CN107551769B - Vehicle-mounted glycol dewatering device and absorption system - Google Patents
Vehicle-mounted glycol dewatering device and absorption system Download PDFInfo
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- CN107551769B CN107551769B CN201710940263.4A CN201710940263A CN107551769B CN 107551769 B CN107551769 B CN 107551769B CN 201710940263 A CN201710940263 A CN 201710940263A CN 107551769 B CN107551769 B CN 107551769B
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- reboiler
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- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 title claims abstract description 118
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 95
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 title claims abstract description 59
- 239000007788 liquid Substances 0.000 claims abstract description 130
- 230000018044 dehydration Effects 0.000 claims abstract description 44
- 238000006297 dehydration reaction Methods 0.000 claims abstract description 44
- 239000000945 filler Substances 0.000 claims abstract description 28
- 238000012856 packing Methods 0.000 claims description 25
- 239000007791 liquid phase Substances 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 10
- 239000012071 phase Substances 0.000 claims description 6
- 239000006096 absorbing agent Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 16
- 238000011900 installation process Methods 0.000 abstract description 7
- 238000000926 separation method Methods 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 6
- 239000007789 gas Substances 0.000 description 82
- 238000000034 method Methods 0.000 description 33
- 230000008569 process Effects 0.000 description 33
- 230000008929 regeneration Effects 0.000 description 18
- 238000011069 regeneration method Methods 0.000 description 18
- 239000002737 fuel gas Substances 0.000 description 10
- 239000002250 absorbent Substances 0.000 description 6
- 230000002745 absorbent Effects 0.000 description 6
- 239000006185 dispersion Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 239000002994 raw material Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005587 bubbling Effects 0.000 description 2
- 238000010327 methods by industry Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 1
- 239000003830 anthracite Substances 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Landscapes
- Gas Separation By Absorption (AREA)
Abstract
The invention provides a vehicle-mounted glycol dehydration device and an absorption system, and relates to the technical field of gas separation. The vehicle-mounted glycol dehydration device comprises a prying seat, an absorption tower, a rectifying column and a reboiler communicated with the bottom of the rectifying column, wherein the absorption tower, the rectifying column and the reboiler are fixedly arranged on the prying seat, a rich liquid outlet and a lean liquid inlet are arranged on the absorption tower, a rich liquid inlet communicated with the rich liquid outlet is arranged on the rectifying column, and a lean liquid outlet communicated with the lean liquid inlet is arranged on the reboiler. Avoiding a plurality of problems of the absorption tower and the rectifying column in the subsequent installation process, saving manpower and material resources. The absorption system comprises the vehicle-mounted glycol dehydration device, and the problems of installation and resetting of an absorption tower and a rectifying column, installation of filler internals and the like are not involved in the subsequent installation process, so that the labor intensity of field installation is reduced.
Description
Technical Field
The invention relates to the technical field of gas separation, in particular to a vehicle-mounted glycol dehydration device and an absorption system.
Background
Dehydration is a common chemical separation process, and some gas wells have better gas quality, do not contain acid gas components and have sufficient heat value, and can enter a long-distance pipeline network only by dehydration. In the traditional dehydration device, other equipment except equipment such as an absorption tower, a rectifying column, a chimney and the like can be prized, but in the field, the workload of installation, such as installation of the absorption tower, resetting of the rectifying column, installation of filler internals, resetting of a pipeline and the like, is still required, and a large amount of manpower and material resources are consumed.
Disclosure of Invention
The invention aims to provide a vehicle-mounted glycol dehydration device, which is used for mounting an absorption tower and a rectifying column on a prying seat, so that the problem of high working strength in the subsequent mounting process is solved.
Another object of the present invention is to provide an absorption system, which includes the above-mentioned vehicle-mounted glycol dehydration device, and can avoid the consumption of a lot of manpower and material resources in the subsequent installation process of the absorption tower and the rectification column.
The invention is realized in the following way:
the utility model provides a vehicular glycol dewatering device, includes sled seat, absorption tower, rectifying column and the reboiler of communicating with rectifying column bottom, and absorption tower, rectifying column and reboiler are all fixed mounting on sled seat, are provided with rich liquor export and lean liquor import on the absorption tower, are provided with the rich liquor import with rich liquor export intercommunication on the rectifying column, are provided with the lean liquor export with lean liquor import intercommunication on the reboiler.
Further, in a preferred embodiment of the present invention, the prying seat is further provided with a lean-rich liquid heat exchanger and a lean liquid conveying device, the rich liquid outlet of the absorption tower is communicated with the cold side inlet of the lean-rich liquid heat exchanger, the cold side outlet of the lean-rich liquid heat exchanger is communicated with the rich liquid inlet of the rectifying column, the lean liquid outlet is communicated with the hot side inlet of the lean-rich liquid heat exchanger, the hot side outlet of the lean-rich liquid heat exchanger is communicated with the input end of the lean liquid conveying device, and the output end of the lean liquid conveying device is communicated with the lean liquid inlet.
Further, in a preferred embodiment of the present invention, a rectifying column condenser and a flash tank are further installed on the prying seat, a hot side inlet of the rectifying column condenser is communicated with a top of the rectifying column, a cold side inlet of the rectifying column condenser is communicated with a rich liquid outlet, a cold side outlet of the rectifying column condenser is communicated with an inlet of the flash tank, and a bottom outlet of the flash tank is communicated with a cold side inlet of the lean-rich liquid heat exchanger.
Further, in a preferred embodiment of the present invention, the vehicle-mounted glycol dehydration device further includes a stripping gas pipe for conveying stripping gas, a stripping compartment is disposed on the reboiler, and an outlet end of the stripping gas pipe is disposed above a bottom plate of the stripping compartment.
Further, in a preferred embodiment of the present invention, a stripping compartment is provided in the reboiler housing.
Further, in the preferred embodiment of the present invention, the specific surface area of the absorption tower is greater than 300m 2 /m 3 Is a filler of (a).
Further, in a preferred embodiment of the present invention, the absorption tower employs a tray type liquid distributor and a double-row vane type gas distributor.
Further, in a preferred embodiment of the present invention, the absorption tower is laterally discharged.
Further, in a preferred embodiment of the present invention, the rectification column uses a specific surface area of more than 250m 2 /m 3 Is a small filler of (a).
An absorption system comprises the vehicle-mounted glycol dehydration device.
The beneficial effects of the invention are as follows: according to the vehicle-mounted glycol dehydration device obtained through the design, the absorption tower and the rectifying column are arranged on the prying seat, so that a plurality of problems of the absorption tower and the rectifying column in a subsequent installation process are avoided, and manpower and material resources are saved. The invention also provides an absorption system which comprises the vehicle-mounted glycol dehydration device, and the problems of installation and resetting of an absorption tower and a rectifying column, installation of filler internals and the like are not involved in the subsequent installation process, so that the workload of on-site installation is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a first schematic structural view of a vehicle-mounted glycol dehydration device provided in embodiment 1 of the present invention;
fig. 2 is a second schematic structural view of the vehicle-mounted glycol dehydration device provided in embodiment 1 of the present invention;
fig. 3 is a schematic structural diagram of a vehicle-mounted glycol dehydration device according to embodiment 2 of the present invention;
FIG. 4 is a schematic diagram of the reboiler of FIG. 3;
FIG. 5 is a cross-sectional view of section A-A of FIG. 4;
FIG. 6 is a cross-sectional view of section B-B of FIG. 4;
FIG. 7 is a schematic view of the gas distributor of FIG. 4;
fig. 8 is a schematic structural diagram of a vehicle-mounted glycol dehydration device according to embodiment 3 of the present invention.
Icon: 100-prying the base; 100 a-vehicle-mounted glycol dehydration device; 100 b-vehicle-mounted glycol dehydration device; 100 c-a vehicle-mounted glycol dehydration device; 110-an absorption column; 112-feed gas inlet; 114-rich liquor outlet; 116-lean liquid inlet; 118-dry gas outlet; 120-rectifying column; 121-a first rectification column; 122-rich liquor inlet; 123-rectifying column condenser; 124-liquid inlet; 126-condensate separation tank; 127-a second rectification column; 130-reboiler; 131-a burner; 134-lean liquid outlet; 1341-lean liquor overflow pipe; 1312—a heat source inlet; 132-stripping gas line; 133-deflector; 1331-gas phase passage; 1332-liquid phase channels; 135-gas distributor; 1351-branch pipes; 1352-dispersion balls; 136-a stripping compartment; 137-manhole; 138-heating means; 139-filler baffle; 1391—a gas-liquid passage; 1392-a through hole; 140-a lean-rich liquid heat exchanger; 150-lean solution conveying device; 160-flash evaporation a tank; 161-a dry gas lean liquid heat exchanger; 166-first solution filter; 168-a second solution filter; 169-buffer tank; 170-a fuel gas buffer tank; 180-dry gas filter; 190-raw gas filter.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center," "longitudinal," "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
Example 1
Referring to fig. 1 and 2, the present embodiment provides a vehicle-mounted glycol dehydration device 100a, which includes a sled base 100, an absorption tower 110, a rectification column 120, and a reboiler 130 connected to the bottom of the rectification column 120, wherein the absorption tower 110, the rectification column 120, and the reboiler 130 are fixedly mounted on the sled base 100, a rich liquid outlet 114 and a lean liquid inlet 116 are provided on the absorption tower 110, a rich liquid inlet 122 connected to the rich liquid outlet 114 is provided on the rectification column 120, and a lean liquid outlet 134 connected to the lean liquid inlet 116 is provided on the reboiler 130.
It should be noted that, the absorption tower 110 and the rectification column 120 are fixedly installed on the prying seat 100, so that the working processes during on-site installation, such as installation of the absorption tower 110, resetting of the rectification column 120, installation of filler internals, resetting of a pipeline and the like, are all unnecessary to be performed on site, transportation is convenient, and equipment fixed on the prying seat 100 is directly fixed on site for use, so that the consumption of manpower and material resources is reduced.
Specifically, the skid base 100 is used for a skid-mounted chassis, a group of devices are fixed on the skid base 100, a pry bar can be used for moving and positioning, and the skid base 100 can be a chassis made of angle steel or i-steel. The heat source inlet 1312 on the reboiler 130 provides heating gas for the reboiler 130, and the specific structure and working principle are the same as the heat supply mode of the existing reboiler 130.
Specifically, the dehydration of glycol is to use glycol as an absorbent, absorb water vapor in the raw material gas in the absorption tower 110, heat and regenerate the raw material gas in the rectification column 120 and the reboiler 130, and return the regenerated absorbent to the absorption tower 110. The raw material gas enters from a raw material gas inlet 112 of the absorption tower 110, fully contacts absorbent glycol in the absorption tower 110, dry gas after moisture in the raw material gas is absorbed is output from a dry gas outlet 118, glycol solution absorbing the moisture is output from a rich liquid outlet 114 of the absorption tower 110, enters a rich liquid inlet 122 of a rectifying column 120, a reboiler 130 is used for providing a heat source for heating the rectifying column 120, glycol and steam are separated in the rectifying column 120 and the reboiler 130, heavy component glycol is output from a lean liquid outlet 134 on the reboiler 130, enters a lean liquid inlet 116 on the absorption tower 110, and the absorption process of the next stage is carried out.
Further, the skid base 100 is further provided with a lean-rich liquid heat exchanger 140 and a lean liquid conveying device 150, the rich liquid outlet 114 of the absorption tower 110 is communicated with the cold side inlet of the lean-rich liquid heat exchanger 140, the cold side outlet of the lean-rich liquid heat exchanger 140 is communicated with the rich liquid inlet 122 of the rectifying column 120, the lean liquid outlet 134 is communicated with the hot side inlet of the lean-rich liquid heat exchanger 140, the hot side outlet of the lean-rich liquid heat exchanger 140 is communicated with the input end of the lean liquid conveying device 150, and the output end of the lean liquid conveying device 150 is communicated with the lean liquid inlet 116.
Specifically, the lean-rich liquid heat exchanger 140 is configured to exchange heat between the lean liquid output from the lean liquid outlet 134 of the reboiler 130 and the rich liquid output from the rich liquid outlet 114 of the absorption tower 110, so that the temperature of the lean liquid is primarily reduced, which is beneficial to enhancing the absorption efficiency of the next absorption process, and the rich liquid to be heated and regenerated is primarily warmed, thereby improving the energy utilization rate and the regeneration efficiency of the regeneration process. The lean solution transporting device 150 is a lean solution pump for supplying the transported power.
It should be noted that, the reason why the conventional process cannot fix the absorption tower 110 and the rectification column 120 to the sled base 100 is that the height is too high for transportation. Therefore, it is necessary to use a highly efficient packing to increase the absorption efficiency, thereby reducing the height of the absorption tower 110 while ensuring the absorption effect.
Further, the absorption tower 110 has a specific surface area of more than 300m 2 /m 3 Is used in the rectification column 120, and the specific surface area is more than 250m 2 /m 3 Is a small filler of (a). The absorption tower 110 and the rectifying column 120 are both filled with high-efficiency filler with large specific surface area, so that the contact area between the high-efficiency filler and gas-liquid phase can be increased, the heights of the absorption tower 110 and the rectifying column 120 are obviously reduced, and the absorption tower 110 and the rectifying column 120 are conveniently arranged on the prying seat 100.
Preferably, the packing of the absorption tower 110 is a combined packing comprising a specific surface area of more than 250m 2 /m 3 And a specific surface area of greater than 500m 2 /m 3 Is filled in the gaps of the regular packing. The efficient small-sized filler is filled in the gaps of the regular filler, so that the contact area between the filler layer and the gas-liquid is increased, the filler space of the absorption tower 110 is fully utilized, and the same absorption efficiency is ensured, and the tower height of the absorption tower 110 is reduced.
Specifically, the specific surface area is more than 250m 2 /m 3 The structured packing of (2) can be 250Y structured packing with specific surface area more than 500m 2 /m 3 The small filler of (2) may be a theta-ring filler. The structured packing is uniformly distributed in a geometric figure in the tower, and the structured packing has large specific surface area, small pressure drop, uniform fluid distribution and high mass and heat transfer efficiency. The 250Y structured packing is 250Y corrugated structured packing, and has the advantages of light weight, high specific surface area, easy replacement and the like. The small-sized filler is small-particle efficient filler with nominal size smaller than 10mm, and is mostly made of metal wires, metal nets or metal plates, and the small-sized filler is small in ring shape, triangle shape and the like, such as theta-ring filler, calendaring hole ring filler and single-ring spiral filler. Therefore, the wave of the structured packing is fully utilized in the gaps of the structured packing of 250Y filled with the theta-ring packing with large specific surface areaThe space can be fully utilized under the limited height of the packing layer in the absorption tower 110, so that the absorption efficiency of the absorption tower 110 can be increased.
Further, the absorption tower 110 employs a disk type liquid phase distributor and a double-row vane type gas distributor. The tray-type liquid phase distributor can uniformly disperse the absorbent, and simultaneously has lower height, thereby being beneficial to reducing the height of the absorption tower 110. The double-row vane type gas distributor can also reduce the height of the absorber 110 to some extent due to its double-row vane type structure on the premise of uniformly distributing the gas.
Further, the absorber 110 is discharged laterally. The absorption tower 110 and the rectification column 120 are both laterally discharged, for example, the rich liquid outlet 114 of the absorption tower 110 is arranged on the side wall of the bottom of the absorption tower 110, the dry gas outlet 118 is arranged on the side wall of the top of the absorption tower 110, and compared with the arrangement of the discharge holes at the top and the bottom of the tower, the arrangement of parts such as nozzles and elbows at the top and the bottom of the absorption tower 110 can be omitted, so that the tower height of the absorption tower 110 is reduced, and the absorption tower 110 is fixedly arranged on the pry seat 100.
The vehicle-mounted glycol dehydration apparatus 100a according to this embodiment has a simple structure, is a dehydration apparatus with low process accuracy requirements, the absorption tower 110 and the rectifying column 120 can be fixed on the prying seat 100, so that the labor intensity in the subsequent installation process is reduced.
Example 2
The vehicle-mounted glycol dehydration apparatus 100b provided in this embodiment has the same implementation principle and technical effects as those of embodiment 1, and for brevity, reference may be made to the corresponding contents of embodiment 1. The difference is that the process of the vehicle-mounted glycol dehydration device 100b provided in this embodiment is more complete, and the absorption and regeneration efficiency is higher, and for the process that has higher process requirements on the absorption and regeneration process, the heights of the absorption tower 110 and the rectification column 120 can be reduced by optimizing the process, so that the absorption tower and the rectification column 120 can be fixedly mounted on the skid base 100.
Referring to fig. 3, the skid base 100 is further provided with a rectification column condenser 123 and a flash tank 160, wherein a hot side inlet of the rectification column condenser 123 is communicated with the top of the rectification column 120, a cold side inlet of the rectification column condenser 123 is communicated with the rich liquid outlet 114, a cold side outlet of the rectification column condenser 123 is communicated with an inlet of the flash tank 160, and a bottom outlet of the flash tank 160 is communicated with a cold side inlet of the lean-rich liquid heat exchanger 140.
It should be noted that, the heat flow of the rich liquid output from the rich liquid outlet 114 of the absorption tower 110 flowing into the rectifying column condenser 123 through the top of the rectifying column 120 is heat exchanged, the rich liquid is primarily warmed up, the natural gas and the water in the rich liquid are primarily separated after the pressure reduction and separation by the flash tank 160, the liquid output from the bottom of the flash tank 160 is mainly glycol and water, and the liquid is heat exchanged with the hot lean liquid by the lean-rich liquid heat exchanger 140, which is equivalent to the secondary warming up of the rich liquid, the heat of the lean liquid output from the vapor at the top of the rectifying column 120 and the lean liquid outlet 134 is fully utilized in the process of the secondary warming up, so that the energy utilization rate is improved, and the regeneration efficiency of the absorbent glycol in the regeneration process is advantageously improved.
Further, the pry seat 100 is further provided with a condensate separating tank 126, an inlet of the condensate separating tank 126 is communicated with the top of the rectifying column condenser 123, gas output from the top of the rectifying column 120 is cooled and liquefied by the rectifying column condenser 123, then enters the condensate separating tank 126, liquid is discharged from a bottom outlet of the condensate separating tank 126, and tail gas is discharged from a top outlet of the condensate separating tank 126.
Further, a first solution filter 166 and a second solution filter 168 are provided on a communication line between the bottom outlet of the flash tank 160 and the cold side inlet of the lean-rich liquid heat exchanger 140, the first solution filter 166 is filled with a first filter packing, and the second solution filter 168 is filled with a second filter packing. Specifically, the first filter filler may be activated carbon for adsorbing organic matters in the output liquid at the bottom of the flash tank 160, so as to improve the purity of the lean liquid in the glycol regeneration process. The second filter packing may be quartz sand or anthracite, etc. for mechanical filtering to improve the purity of the rich solution entering the rich solution inlet 122 and the quality of the regenerated lean solution.
Further, the skid base 100 is further provided with a fuel gas buffer tank 170, an inlet of the fuel gas buffer tank 170 is communicated with a top outlet of the flash tank 160, and a top outlet of the fuel gas buffer tank 170 is communicated with the burner 131 of the reboiler 130. The gas output from the top of the flash tank 160 is mainly natural gas with a small amount of water vapor, and this gas is stored as fuel gas for fueling the burner 131 of the reboiler 130, so that the energy utilization rate is improved, and the process cost is reduced. In addition, a drain port is provided at the bottom of the fuel gas buffer tank 170 for draining moisture in the gas output from the top outlet of the flash tank 160.
Further, a dry gas-lean solution heat exchanger 161 is disposed on a communication pipeline between an output end of the lean solution conveying device 150 and the lean solution inlet 116, a hot side inlet of the dry gas-lean solution heat exchanger 161 is communicated with an output end of the lean solution conveying device 150, a hot side outlet of the dry gas-lean solution heat exchanger 161 is communicated with the lean solution inlet 116, a cold side inlet of the dry gas-lean solution heat exchanger 161 is communicated with the dry gas outlet 118, and a cold side outlet of the dry gas-lean solution heat exchanger 161 is communicated with an inlet of the fuel gas buffer tank 170. The dry gas-lean liquid heat exchanger 161 is used for exchanging heat between lean liquid output by the lean liquid conveying device 150 and dry gas output by the dry gas outlet 118, so that the lean liquid is cooled for the second time, which is beneficial to improving the absorption efficiency in the next absorption process.
Further, a dry gas filter 180 is provided on a communication line between the dry gas lean liquid heat exchanger 161 and the fuel gas buffer tank 170, an inlet of the dry gas filter 180 is communicated with a cold side outlet of the dry gas lean liquid heat exchanger 161, a top outlet of the dry gas filter 180 is communicated with an inlet of the fuel gas buffer tank 170, and a top outlet of the dry gas filter 180 is communicated with a bottom of the reboiler 130 through a gas stripping gas pipe 132. The dry gas filter 180 mechanically filters the dry gas, discharges liquid glycol in the dry gas, the glycol is output from a drain outlet at the bottom of the dry gas filter 180, pure dry gas is output from the top of the dry gas filter 180, a part of the pure dry gas enters the next process as a product, a part of the pure dry gas enters the fuel gas buffer tank 170 to provide fuel for the reboiler 130, and a part of the pure dry gas enters the bottom of the reboiler 130 as stripping gas, so that the energy utilization rate of the whole process is improved.
Further, the vehicle-mounted glycol dehydration apparatus 100b further comprises a raw gas filter 190, and the raw gas is filtered by the raw gas filter 190 before entering the raw gas inlet 112 of the absorption tower 110, so as to remove liquid water or free liquid substances in the raw gas, and improve the process effect of the subsequent absorption and regeneration processes.
Further, referring to fig. 3 and 4, the vehicle-mounted glycol dehydration apparatus 100b further includes a gas stripping pipeline 132 for delivering gas stripping gas, and a gas stripping compartment 136 is disposed in a shell of the reboiler 130, so that the volume of the apparatus is reduced by integrating the apparatus. The outlet end of the stripping gas conduit 132 is disposed above the floor of the stripping compartment 136. The packing is filled in the stripping compartment 136 for carrying out the stripping process, the liquid at the bottom of the rectifying column 120 enters the reboiler 130 and enters the stripping compartment 136 through the gas-liquid channel 1391 on the stripping compartment 136, and the dry gas is used as stripping gas and is led into the bottom of the stripping compartment 136 through the through hole 1392 by the stripping gas pipeline 132, so that the partial pressure of water vapor is reduced, the stripping action is enhanced in a bubbling mode, the moisture in the glycol solution is separated, and the regeneration efficiency of the glycol is increased.
Specifically, a heating element 138, a baffle 133 and a packing baffle 139 are disposed in the cavity of the reboiler 130, and the packing baffle 139 is a baffle of the stripping compartment 136 near the side of the baffle 133. The heating unit 138 is used for heating the gas and the liquid in the cavity of the reboiler 130, and has the same structure and operation principle as the existing heat exchange assembly for heating. Referring to fig. 5, a gas phase channel 1331 for gas circulation is formed between the top of the baffle 133 and the top wall of the reboiler 130, and a liquid phase channel 1332 for liquid circulation is formed between the bottom of the baffle 133 and the bottom wall of the reboiler 130. Referring to fig. 6, a gas-liquid channel 1391 through which gas phase and liquid phase circulate is formed between the top of the packing baffle 139 and the top wall of the reboiler 130, and a sealing baffle structure is disposed below the gas-liquid channel 1391. Specifically, the gas-liquid channel 1391 is in a strip-shaped hole structure, and liquid phase flows in from the bottom of the baffle 133 and enters the stripping compartment 136 through the gas-liquid channel 1391 at the top of the filler baffle 139, reducing the occurrence of back mixing.
Further, referring to fig. 4 and 7, a gas distributor 135 is further disposed in the stripping compartment 136, and a manhole 137 for facilitating the installation of packing is further disposed at the top of the stripping compartment 136. Specifically, gas distributor 135 includes a branch 1351 and a dispersion ball 1352, branch 1351 communicating with the outlet end of stripping gas conduit 132, dispersion ball 1352 being higher than the inlet end of lean liquid overflow pipe 1341. The stripping gas is output by the stripping gas pipeline 132 and then enters the branch pipe 1351 of the gas distributor 135 to be conveyed to the dispersion balls 1352, and the gas is output from the dispersion balls 1352 to strengthen the bubbling effect, so that the effect of the stripping process is improved, and the purity of the lean solution is improved. The dispersion balls 1352 are higher than the inlet end of the lean liquid overflow pipe 1341, so that the stripping gas is prevented from entering the lean liquid overflow pipe 1341 to reduce the purity of the lean liquid.
It should be noted that, compared with the process of embodiment 1, the vehicle-mounted glycol dehydration device 100b provided in this embodiment is more complete, improves the working efficiency and product quality of the absorption and regeneration process, and can be applied to a process with higher separation precision.
Example 3
Referring to fig. 8, the vehicle-mounted glycol dehydration apparatus 100c according to this embodiment has the same implementation principle and technical effects as those of embodiment 2, and for brevity, reference may be made to the corresponding contents of embodiment 2 where this embodiment is not mentioned. The difference is that the rectification column 120 of the vehicle-mounted glycol dehydration device 100c provided in this embodiment includes a first rectification column 121 and a second rectification column 127.
The rectification column 120 includes a first rectification column 121 and a second rectification column 127, i.e., the rectification column 120 is divided into two parts, one part is integrated with the reboiler 130, and the other part is used alone after being combined with the rectification column condenser 123. The height of the rectifying column 120 can be increased by the arrangement, the process engineering with higher requirements on the glycol regeneration process can be adopted, and the absorbing tower 110 and the rectifying column 120 can be fixedly arranged on the pry seat 100 while meeting the process requirements.
Specifically, the hot side inlet of the rectification column condenser 123 is communicated with the top of the first rectification column 121, the reboiler 130 is communicated with the bottom of the second rectification column 127, the second rectification column 127 is provided with a liquid inlet 124, the bottom outlet of the first rectification column 121 is communicated with the liquid inlet 124 of the second rectification column 127, and the cold side outlet of the lean-rich liquid heat exchanger 140 is communicated with the rich liquid inlet 122 on the second rectification column 127.
It should be noted that, the rich liquid inlet 122 is disposed on the second rectifying column 127, the gas phase after the regeneration process performed by the second rectifying column 127 and the reboiler 130 enters the first rectifying column 121 to continue the regeneration process, so as to improve the regeneration efficiency, the hot steam provides a heat source for the rectifying column condenser 123, and the gas-liquid separation is performed by the condensate separating tank 126 after cooling.
It should be noted that, compared to the vehicle-mounted glycol dehydration device 100b in embodiment 2, the vehicle-mounted glycol dehydration device 100c provided in this embodiment is suitable for a process with a higher regeneration requirement, and the total height of the rectification column 120 is equal to the sum of the first rectification column 121 and the second rectification column 127, so that the vehicle-mounted glycol dehydration device can achieve better regeneration efficiency while meeting the requirement of being mounted on the sled base 100.
The invention also provides an absorption system which comprises the vehicle-mounted glycol dehydration device. The absorbent of the absorption system absorbs the components to be absorbed in the raw material gas through the absorption tower 110, and the rich liquid is regenerated in the rectifying column 120 and the reboiler 130 and then returns to the absorption tower 110.
In summary, the invention provides a vehicle-mounted glycol dehydration device, which is characterized in that an absorption tower and a rectifying column are fixedly arranged on a prying seat, so that the problems of installation of the absorption tower, resetting of the rectifying column, installation of filler internals and the like are avoided in the subsequent field construction process, and the workload of field installation is reduced; the rich liquid is initially heated by a rectifying column condenser, so that the regeneration efficiency of the glycol is improved; the rectification column is divided into two parts, one part is integrated with the reboiler, and the other part is used independently after being combined with the rectification column condenser, so that the height of the rectification column can be increased, and the process engineering with higher requirements on the glycol regeneration process can be met. The invention also provides an absorption system, which avoids a plurality of problems of the absorption tower and the rectifying column in the subsequent installation process and saves manpower and material resources by installing the absorption tower and the rectifying column on the prying seat.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The vehicle-mounted glycol dehydration device is characterized by comprising a prying seat, an absorption tower, a rectifying column and a reboiler communicated with the bottom of the rectifying column, wherein the absorption tower, the rectifying column and the reboiler are fixedly arranged on the prying seat, a rich liquid outlet and a lean liquid inlet are arranged on the absorption tower, a rich liquid inlet communicated with the rich liquid outlet is arranged on the rectifying column, and a lean liquid outlet communicated with the lean liquid inlet is arranged on the reboiler;
the vehicle-mounted glycol dehydration device further comprises a gas stripping pipeline for conveying gas stripping, a gas stripping compartment is arranged in the shell of the reboiler, and the outlet end of the gas stripping pipeline is arranged above the bottom plate of the gas stripping compartment;
a heating component, a guide plate and a packing baffle are arranged in a cavity of the reboiler, and the packing baffle is a baffle on one side of the stripping compartment close to the guide plate; the heating component is used for heating gas and liquid in the cavity of the reboiler, a gas phase channel for gas circulation is formed between the top of the guide plate and the top wall of the reboiler, and a liquid phase channel for liquid circulation is formed between the bottom of the guide plate and the bottom wall of the reboiler; a gas-liquid channel for gas phase and liquid phase circulation is formed between the top of the packing baffle and the top wall of the reboiler, and a sealing baffle structure is arranged below the gas-liquid channel; the gas-liquid channel is in a bar-shaped hole structure, and liquid phase flows in from the bottom of the guide plate and enters the gas stripping compartment through the gas-liquid channel at the top of the filler baffle.
2. The vehicle-mounted glycol dehydration device according to claim 1, wherein the pry seat is further provided with a lean and rich liquid heat exchanger and a lean liquid conveying device, the rich liquid outlet of the absorption tower is communicated with a cold side inlet of the lean and rich liquid heat exchanger, a cold side outlet of the lean and rich liquid heat exchanger is communicated with the rich liquid inlet of the rectifying column, the lean liquid outlet is communicated with a hot side inlet of the lean and rich liquid heat exchanger, a hot side outlet of the lean and rich liquid heat exchanger is communicated with an input end of the lean liquid conveying device, and an output end of the lean liquid conveying device is communicated with the lean liquid inlet.
3. The vehicle-mounted glycol dehydration device of claim 2, wherein the skid base is further provided with a rectification column condenser and a flash tank, a hot side inlet of the rectification column condenser is communicated with the top of the rectification column, a cold side inlet of the rectification column condenser is communicated with the rich liquid outlet, a cold side outlet of the rectification column condenser is communicated with an inlet of the flash tank, and a bottom outlet of the flash tank is communicated with a cold side inlet of the lean-rich liquid heat exchanger.
4. The vehicle-mounted glycol dehydration apparatus according to any one of claims 1 to 3, wherein said absorption tower has a specific surface area of more than 300m 2 /m 3 Is a filler of (a).
5. The vehicle-mounted glycol dehydrator according to claim 4, wherein said absorption tower employs a tray type liquid phase distributor and a double-row vane type gas distributor.
6. The vehicle-mounted glycol dehydrator according to claim 4, wherein said absorber is side-draw.
7. The vehicle-mounted glycol dehydration apparatus according to any one of claims 1 to 3, wherein said rectification column employs a specific surface area of more than 250m 2 /m 3 Is a small filler of (a).
8. An absorption system comprising the vehicle-mounted glycol dehydration apparatus of any one of claims 1-7.
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| CN201710940263.4A CN107551769B (en) | 2017-10-11 | 2017-10-11 | Vehicle-mounted glycol dewatering device and absorption system |
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| CN201710940263.4A CN107551769B (en) | 2017-10-11 | 2017-10-11 | Vehicle-mounted glycol dewatering device and absorption system |
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| CN107551769B true CN107551769B (en) | 2024-04-05 |
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| CN204385153U (en) * | 2015-01-21 | 2015-06-10 | 杰瑞(天津)石油工程技术有限公司 | Sledge-borne type triglycol natual gas dehydrate unit |
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