CN108298459B

CN108298459B - Lifting type SCR catalyst on-site regeneration equipment

Info

Publication number: CN108298459B
Application number: CN201810228999.3A
Authority: CN
Inventors: 张巍; 宋权斌
Original assignee: Changsha University of Science and Technology
Current assignee: Changsha University of Science and Technology
Priority date: 2018-03-20
Filing date: 2018-03-20
Publication date: 2023-06-30
Anticipated expiration: 2038-03-20
Also published as: CN108298459A

Abstract

The invention discloses lifting type SCR catalyst field regeneration equipment, which comprises a fixed support frame which is in butt joint with an SCR catalyst field reaction station, wherein a liquid storage component is arranged at the bottom end of the fixed support frame, a conveying lifting component which can extend into the liquid storage component is arranged in the fixed support frame, a butt joint component for butt joint with the reaction station SCR catalyst is arranged at the bottom end of the conveying lifting component, and a heating lifting component for heating the SCR catalyst is arranged above the butt joint component on the conveying lifting component. The device has the advantages of simple and compact structure, short period, low cost, small workload and capability of improving the regeneration quality.

Description

Lifting type SCR catalyst on-site regeneration equipment

Technical Field

The invention mainly relates to the field of flue gas purification, in particular to lifting SCR catalyst on-site regeneration equipment.

Background

In recent years, with the reduction of the environmental capacity of China and the stricter national emission standards of nitrogen oxides, the emission reduction pressure of the nitrogen oxides is larger and larger. At present, the emission control of the coal-fired power plant on the nitrogen oxides is mainly divided into pre-generation control and post-generation control, wherein the pre-generation control mainly comprises a low-nitrogen combustion technology and a re-combustion technology, and the post-generation control mainly comprises a dry method and a wet method. The control after combustion of coal-fired power plants in China mainly adopts a selective catalytic reduction method (Selective Catalytic Reduction, SCR) in a dry method to be applied to a flue gas denitration system. This technology is basically applied in most power plants in japan, europe, and united states, etc.

The SCR denitration principle is to reduce NOx into nitrogen and water which have no pollution to the atmosphere under certain conditions by utilizing the reduction function of ammonia on nitrogen oxides, and the SCR is currently the most widely applied, mature and effective flue gas denitration technology in the world, and has the advantages of small secondary pollution and high purification efficiency. However, the catalyst has a lifetime of 3-5 years due to ash blocking, poisoning and abrasion, and the catalyst has high cost, so that the method of regenerating and activating the catalyst is necessary to reduce the operation cost of the SCR system.

At present, the regeneration method of the SCR denitration catalyst in the coal-fired power plant is to remove the SCR catalyst module to a regeneration manufacturer, regularly overturn the regenerated SCR catalyst module in a cleaning tank and a regeneration tank, and because the volume and the weight of the catalyst module are relatively large and the catalyst wall is relatively thin, the catalyst is not suitable for strong stirring or carrying, and the existing SCR denitration catalyst regeneration is mostly designed and manufactured according to each flow respectively, so that the occupied area of the existing SCR denitration catalyst regeneration device is too large and construction funds are consumed. In addition, due to the continuity of the regeneration process, the SCR denitration catalyst module to be regenerated is required to be carried from one device to another for multiple times, and in the carrying process, the damage of the SCR denitration catalyst module to be regenerated is extremely easy to cause, so that the regeneration quality is affected.

Disclosure of Invention

The invention aims to solve the technical problem of overcoming the defects of the prior art and providing lifting type SCR catalyst on-site regeneration equipment which has the advantages of simple and compact structure, short period, low cost, small workload and capability of improving the regeneration quality.

In order to solve the technical problems, the invention adopts the following technical scheme:

the lifting type SCR catalyst field regeneration device comprises a fixed support frame which is in butt joint with an SCR catalyst field reaction station, wherein a liquid storage component is arranged at the bottom end of the fixed support frame, a conveying lifting component which can extend into the liquid storage component is arranged in the fixed support frame, a butt joint component for butt joint of the SCR catalyst at the reaction station is arranged at the bottom end of the conveying lifting component, and a heating lifting component for heating the SCR catalyst is arranged above the butt joint component on the conveying lifting component.

As a further improvement of the above technical scheme:

the conveying lifting assembly comprises a winch and a lifting frame, the winch is fixedly arranged at the top in the fixed supporting frame and connected with the lifting frame through a steel wire rope, the butt joint assembly is arranged at the bottom end of the lifting frame, and the heating lifting assembly is arranged on the lifting frame.

The lifting frame comprises an upper transverse frame, a lower transverse frame and a vertical frame, wherein the upper transverse frame and the lower transverse frame are fixedly connected through the vertical frame, the butt joint assembly is arranged on the lower transverse frame, and the heating lifting assembly is arranged on the upper transverse frame.

The upper transverse frame and the lower transverse frame are respectively provided with a vertical guide sleeve, a vertical rail extending into the liquid storage assembly is arranged in the fixed support frame, and the vertical guide sleeves are arranged on the vertical rail in a sliding manner.

The butt joint assembly comprises butt joint rails and butt joint rails, the butt joint rails are distributed on two opposite sides of the lower transverse frame and fixedly connected with vertical guide sleeves on the corresponding sides, one end of each butt joint rail is hinged, and the other end of each butt joint rail is in butt joint with the corresponding reaction station or vertically overturns into the fixed supporting frame.

The heating lifting assembly comprises a telescopic frame and a heater, wherein the telescopic frame is arranged at the bottom of the upper transverse frame, and the heater is arranged at the bottom of the telescopic frame.

The fixed support frame comprises an outer support frame and an inner support frame, the outer support frame is fixedly abutted to an SCR catalyst site reaction station, the inner support frame is fixed in the outer support frame, the liquid storage assembly is arranged at the bottom of the inner support frame, the vertical rail is arranged at the inner side of the inner support frame, the winch is fixedly arranged at the top in the inner support frame, and the inner support frame is provided with an opening and closing door for overturning the abutting rail at the abutting position.

The fixed support frame and the SCR catalyst field reaction station are provided with traction blocks for driving the SCR catalyst to translate along the butt assembly.

The liquid storage assembly comprises a liquid storage tank, and a liquid inlet and a liquid outlet are formed in the side part and the bottom part of the liquid storage tank.

An anti-collision net is arranged at a position, close to the bottom, in the liquid storage tank, and a stirrer is arranged below the anti-collision net in the liquid storage tank.

Compared with the prior art, the invention has the advantages that:

when the lifting type SCR catalyst on-site regeneration equipment is used, clean water is filled in a stock solution component, the SCR catalyst of a reaction station is horizontally moved to a butt component in a fixed supporting frame, a conveying lifting component is started to drive the SCR catalyst on the butt component to descend, the SCR catalyst is soaked in a liquid phase of the stock solution component, stubborn dust attached to the surface of the SCR catalyst is loosened and falls, the conveying lifting component is started to drive the SCR catalyst to reciprocally lift and move so that the loosened dust is cleaned, after cleaning is completed, the conveying lifting component is started to drive the SCR catalyst to lift to an original position, the heating lifting component is started to descend to the vicinity of the SCR catalyst, a heating function is started, the integral temperature of the SCR catalyst reaches 120 ℃, if a plurality of SCR catalyst modules are involved, the SCR catalyst after cleaning and drying are completed is returned to the reaction station, the cleaning and drying of all the SCR catalyst modules are repeated, then the stock solution component body is filled in the stock solution component, the SCR catalyst is soaked in the stock solution, the stock solution component is reciprocally lifted to enable the relaxed dust to be cleaned, after the cleaning and drying is completed, the SCR catalyst is lifted to the integral temperature is lifted to reach the original position, the heating function is started to enable the SCR catalyst to be heated, the integral temperature reaches to reach the original position, the original temperature after the cleaning is solidified, the catalyst is heated, the integral temperature is heated to be heated, and is solidified, and the catalyst is solidified to be heated to reach the original position. Compared with the traditional structure, the regeneration equipment can realize the on-site ortho-position translation regeneration effect of the SCR catalyst, does not need to be carried for many times, and has the advantages of short period, low cost and small workload; the problem of damage caused by repeated transportation can be prevented, and the regeneration quality is improved; as the lifting type field regeneration device is also lifting type field regeneration equipment, the upper space is fully utilized, the structure is simple and compact, and the occupied area is reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic view of the a-direction structure of fig. 1.

Fig. 3 is a schematic view of the use state of the present invention (SCR catalyst translational transport state).

Fig. 4 is a schematic view of the use state of the present invention (SCR catalyst soaked state).

The reference numerals in the drawings denote:

1. fixing the supporting frame; 11. an outer support; 12. an inner support; 121. opening and closing a door; 2. a liquid storage component; 21. a liquid storage tank; 211. a liquid inlet; 212. a liquid outlet; 22. an anti-collision net; 23. a stirrer; 3. a transport lift assembly; 31. a hoist; 32. a lifting frame; 321. an upper horizontal frame; 322. a lower horizontal frame; 323. a mullion; 324. a vertical guide sleeve; 4. a butt joint assembly; 41. a butt joint rail; 42. a butt joint track; 5. heating the lifting assembly; 51. a telescopic frame; 52. a heater; 6. a vertical rail; 7. traction hoist.

Detailed Description

The invention will be described in further detail with reference to the drawings and the specific examples.

Fig. 1 to 4 show an embodiment of lifting type on-site regeneration equipment for an SCR catalyst according to the present invention, which comprises a fixed support frame 1 butted with an on-site reaction station of the SCR catalyst, a liquid storage component 2 is arranged at the bottom end of the fixed support frame 1, a conveying lifting component 3 capable of extending into the liquid storage component 2 is arranged in the fixed support frame 1, a butt joint component 4 for butt-joint the SCR catalyst at the reaction station is arranged at the bottom end of the conveying lifting component 3, and a heating lifting component 5 for heating the SCR catalyst is arranged above the butt joint component 4 on the conveying lifting component 3. During the use, annotate the clear water in stock solution subassembly 2, on the butt subassembly 4 in with the SCR catalyst translation of reaction station to fixed support frame 1, start and carry lifting assembly 3 to drive the SCR catalyst on the butt subassembly 4 and descend, make the SCR catalyst soak in the liquid phase of stock solution subassembly 2, after the obstinate laying dust that adheres to the SCR catalyst surface loosens and drops, start and carry lifting assembly 3 and drive the reciprocating lifting motion of SCR catalyst, make the laying dust that loosens obtain wasing, after wasing, start and carry lifting assembly 3 and drive the SCR catalyst and promote to the home position, start heating lifting assembly 5 and descend near the SCR catalyst, start heating function, make the whole temperature of SCR catalyst reach 120 ℃, if a plurality of SCR catalyst modules are involved, accomplish the washing and the SCR catalyst home run of drying and temporarily park of reaction station, the washing and the drying of all SCR catalyst modules are accomplished in the above-mentioned action, then stock solution subassembly 2 body is carried out blowdown and is washd, and is annotated again in the activation solution to subassembly 2, will accomplish the washing and dry SCR catalyst soak in activation solution of stock solution subassembly 2 and wash, make the setting up and carry lifting assembly 3, then drive the catalyst and lift the catalyst to the home position, it is carried to the catalyst to the home position to the place, start heating function, the catalyst is carried to the home position to the place, the catalyst is heated, the catalyst is solidified and is heated to the home position is reached, the catalyst is solidified to the home position is heated, and is heated to the catalyst is heated to the home to the place is baked, and is heated to the place. Compared with the traditional structure, the regeneration equipment can realize the on-site ortho-position translation regeneration effect of the SCR catalyst, does not need to be carried for many times, and has the advantages of short period, low cost and small workload; the problem of damage caused by repeated transportation can be prevented, and the regeneration quality is improved; as the lifting type field regeneration device is also lifting type field regeneration equipment, the upper space is fully utilized, the structure is simple and compact, and the occupied area is reduced.

In this embodiment, the conveying lifting assembly 3 includes a hoist 31 and a lifting frame 32, the hoist 31 is fixedly mounted at the top in the fixed supporting frame 1, the hoist 31 is connected with the lifting frame 32 through a steel wire rope, the butt joint assembly 4 is arranged at the bottom end of the lifting frame 32, and the heating lifting assembly 5 is mounted on the lifting frame 32. In this structure, start hoist engine 31, hoist engine 31 passes through wire rope and drives crane 32 and go up and down, and crane 32 drives butt subassembly 4 and the synchronous lift of heating lifting assembly 5 to realize the lift of SCR catalyst, guaranteed the reciprocal delivery path of SCR catalyst from reaction station to regeneration station promptly.

In this embodiment, the lifting frame 32 includes an upper horizontal frame 321, a lower horizontal frame 322 and a vertical frame 323, the upper horizontal frame 321 and the lower horizontal frame 322 are fixedly connected through the vertical frame 323, the butt joint assembly 4 is arranged on the lower horizontal frame 322, and the heating lifting assembly 5 is mounted on the upper horizontal frame 321. In this structure, go up horizontal frame 321 and lower horizontal frame 322 and connect fixedly through mullion 323 and form holistic frame construction, simple structure is stable, forms the fretwork in the centre, and the SCR catalyst of being convenient for moves to butt subassembly 4, has also guaranteed the running space of heating lifting assembly 5, has filled and has utilized the space, and its design is very ingenious.

In this embodiment, the upper transverse frame 321 and the lower transverse frame 322 are both provided with vertical guide sleeves 324, the vertical rail 6 extending into the liquid storage assembly 2 is installed in the fixed support frame 1, and the vertical guide sleeves 324 are slidably arranged on the vertical rail 6. The vertical guide sleeve 324 and the vertical rail 6 are matched to ensure the integral lifting linearity of the lifting frame 32, avoid the phenomena of rotation, deflection and collision and improve the integral lifting stability.

In this embodiment, the butt joint assembly 4 includes a butt joint track 41 and a butt joint track 42, where the butt joint track 41 is distributed on two opposite sides of the lower transverse frame 322 and fixedly connected with the vertical guide sleeve 324 on the corresponding side, and one end of the butt joint track 42 is hinged with the butt joint track 41, and the other end is butt-jointed with the reaction station or vertically turned into the fixed support frame 1. In this structure, butt joint track 41 is adorned admittedly on lower horizontal frame 322 for bear the SCR catalyst that translation was come over, also guaranteed the smoothness nature of SCR catalyst translation simultaneously, and butt joint track 42 mainly plays the bridge effect between butt joint track 41 and the reaction station, and it does not influence two stations normal operating again when overturning to fixed support frame 1.

In this embodiment, the heating and lifting assembly 5 includes a telescopic frame 51 and a heater 52, the telescopic frame 51 is installed at the bottom of the upper transverse frame 321, and the heater 52 is installed at the bottom of the telescopic frame 51. The telescopic frame 51 is used for driving the heater 52 to reciprocate, and can convey the heater 52 to the vicinity of the SCR catalyst during descending, so that the heating efficiency is improved; the heater 52 can be sent to a position far away from the liquid storage assembly 2 when the device is lifted, so that the heater 52 is prevented from touching water.

In this embodiment, the fixed support 1 includes an outer support 11 and an inner support 12, the outer support 11 is fixedly abutted to the site reaction station of the SCR catalyst, the inner support 12 is fixed in the outer support 11, the liquid storage component 2 is disposed at the bottom of the inner support 12, the vertical rail 6 is mounted at the inner side of the inner support 12, the winch 31 is fixedly mounted at the top of the inner support 12, and the inner support 12 is provided with an opening and closing door 121 for overturning the abutting track 42 at the abutting position. In this structure, outer support frame 11 is as the main support piece of overall structure, and the installation basis of each subassembly in the interior is formed to inner support frame 12, and open and close door 121 is used for dodging butt joint track 42 and closes the turnover mouth, guarantees that two stations do not influence each other.

In this embodiment, the fixed support frame 1 and the SCR catalyst site reaction station are provided with a traction hoist 7 for driving the SCR catalyst to translate along the butt assembly 4. When the traction hoist 7 on the two sides respectively acts, the SCR catalyst is translated to the butt assembly 4 from the reaction station, or the SCR catalyst is translated to the reaction station from the butt assembly 4.

In this embodiment, the liquid storage assembly 2 includes a liquid storage tank 21, and a liquid inlet 211 and a liquid outlet 212 are disposed at the side and bottom of the liquid storage tank 21. In this structure, the fresh water and the activation liquid are filled from the liquid inlet 211 and discharged from the liquid outlet 212.

In this embodiment, an anti-collision net 22 is disposed in the liquid storage tank 21 near the bottom, and a stirrer 23 is disposed below the anti-collision net 22 in the liquid storage tank 21. The design of the anti-collision net 22 can play a role in buffering, and is used for preventing the lower transverse frame 322 from forming rigid collision with the bottom of the liquid storage tank 21 when being lowered to the excessive position; the stirrer 23 is used for stirring during drainage, so that the dirt and dust can be stirred and lifted, and the dirt and dust can be prevented from adhering.

While the invention has been described in terms of preferred embodiments, it is not intended to be limiting. Many possible variations and modifications of the disclosed technology can be made by anyone skilled in the art, or equivalent embodiments with equivalent variations can be made, without departing from the scope of the invention. Therefore, any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention shall fall within the scope of the technical solution of the present invention.

Claims

1. The utility model provides a lift-type SCR catalyst scene regeneration equipment which characterized in that: including fixed support frame (1) with the butt joint of SCR catalyst site reaction station, fixed support frame (1) bottom is equipped with stock solution subassembly (2), is equipped with in fixed support frame (1) and can stretch to transport lifting unit (3) in stock solution subassembly (2), transport lifting unit (3) bottom is equipped with butt subassembly (4) that are used for butt reaction station SCR catalyst, be equipped with on transport lifting unit (3) in butt subassembly (4) top and be used for heating lifting unit (5) to SCR catalyst, fixed support frame (1) and SCR catalyst site reaction station are equipped with and are used for driving the traction hoist (7) of SCR catalyst along butt subassembly (4) translation, stock solution subassembly (2) are including liquid reserve tank (21), liquid reserve tank (21) lateral part and bottom are equipped with inlet (211) and leakage fluid dram (212) respectively.

2. The elevating SCR catalyst on-site regeneration equipment of claim 1, wherein: the conveying lifting assembly (3) comprises a winch (31) and a lifting frame (32), the winch (31) is fixedly arranged at the top in the fixed supporting frame (1), the winch (31) is connected with the lifting frame (32) through a steel wire rope, the butt joint assembly (4) is arranged at the bottom end of the lifting frame (32), and the heating lifting assembly (5) is arranged on the lifting frame (32).

3. The elevating SCR catalyst on-site regeneration equipment of claim 2, wherein: the lifting frame (32) comprises an upper transverse frame (321), a lower transverse frame (322) and a vertical frame (323), wherein the upper transverse frame (321) and the lower transverse frame (322) are fixedly connected through the vertical frame (323), the butt joint assembly (4) is arranged on the lower transverse frame (322), and the heating lifting assembly (5) is arranged on the upper transverse frame (321).

4. The elevating SCR catalyst on-site regeneration equipment as defined in claim 3, wherein: the upper transverse frame (321) and the lower transverse frame (322) are respectively provided with a vertical guide sleeve (324), a vertical rail (6) extending into the liquid storage assembly (2) is arranged in the fixed support frame (1), and the vertical guide sleeves (324) are slidably arranged on the vertical rail (6).

5. The elevating SCR catalyst on-site regeneration equipment as defined in claim 4, wherein: the butt joint assembly (4) comprises butt joint rails (41) and butt joint rails (42), the butt joint rails (41) are distributed on two opposite sides of the lower transverse frame (322) and fixedly connected with vertical guide sleeves (324) on the corresponding sides, one end of each butt joint rail (42) is hinged to the butt joint rail (41), and the other end of each butt joint rail is in butt joint with the corresponding reaction station or vertically overturned into the fixed support frame (1).

6. The elevating SCR catalyst on-site regeneration equipment of claim 5, wherein: the heating lifting assembly (5) comprises a telescopic frame (51) and a heater (52), the telescopic frame (51) is arranged at the bottom of the upper transverse frame (321), and the heater (52) is arranged at the bottom of the telescopic frame (51).

7. The elevating SCR catalyst on-site regeneration equipment of claim 6, wherein: the fixed support frame (1) comprises an outer support frame (11) and an inner support frame (12), the outer support frame (11) is fixedly abutted to an SCR catalyst site reaction station, the inner support frame (12) is fixed in the outer support frame (11), the liquid storage assembly (2) is arranged at the bottom of the inner support frame (12), the vertical rail (6) is arranged at the inner side of the inner support frame (12), the winch (31) is fixedly arranged at the top in the inner support frame (12), and an opening and closing door (121) for overturning a butt joint track (42) is arranged at the butt joint position of the inner support frame (12).

8. The elevating SCR catalyst on-site regeneration equipment according to any one of claims 1 to 7, wherein: an anti-collision net (22) is arranged at a position, close to the bottom, in the liquid storage tank (21), and a stirrer (23) is arranged below the anti-collision net (22) in the liquid storage tank (21).