CN201954524U - Low-temperature economizer - Google Patents
Low-temperature economizer Download PDFInfo
- Publication number
- CN201954524U CN201954524U CN 201120028085 CN201120028085U CN201954524U CN 201954524 U CN201954524 U CN 201954524U CN 201120028085 CN201120028085 CN 201120028085 CN 201120028085 U CN201120028085 U CN 201120028085U CN 201954524 U CN201954524 U CN 201954524U
- Authority
- CN
- China
- Prior art keywords
- temperature heat
- low
- heat exchange
- exchange tube
- tube bundle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000004071 soot Substances 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000003466 welding Methods 0.000 claims description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 14
- 239000003546 flue gas Substances 0.000 abstract description 13
- 238000005260 corrosion Methods 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 23
- 239000002956 ash Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 241000440444 Phakopsora Species 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The utility model discloses a low-temperature economizer, comprising a shell (1), high-temperature heat-exchange pipe bundles (2), low-temperature heat-exchange pipe bundles (3), water inlets (4) and water outlets (5), wherein the shell (1) is internally provided with 1-4 groups of high-temperature heat-exchange pipe bundles (2) and 1-4 groups of low-temperature heat-exchange pipe bundles (3), the high-temperature heat-exchange pipe bundles (2) and the low-temperature heat-exchange pipe bundles (3) are connected in series through connection pipes (6), each group of high-temperature heat-exchange pipe bundle (2) is provided with one water outlet, each group of low-temperature heat-exchange pipe bundle (3) is provided with one water inlet (4), and soot blowers (7) are arranged between the high-temperature heat-exchange pipe bundles (2) and the low-temperature heat-exchange pipe bundles (3). By means of the low-temperature economizer disclosed by the utility model, the heat energy of flue gas of a boiler can be recovered, the temperature of the flue gas exhausted by the boiler is reduced, the circulation efficiency of a power plant is improved, and the advantages of corrosion resistance, long service life, difficulty in soot formation and clogging and low equipment investment are achieved.
Description
Technical field
The utility model relates to a kind of economizer, and particularly a kind of low-level (stack-gas) economizer that can reduce all kinds of station boiler exhaust gas temperatures belongs to boiler afterheat and reclaims energy-saving field.
Background technology
Along with the raising of people's living standard, also increasing to the demand of electric power, therefore a lot of power plant generating equipment is also in continuous improvement.Because the increase-volume of generating set reconstruction, the exhaust gas temperature of a lot of power plant all can raise, and departs from the original design value, and the rising temperature reaches 20～500 degree, and the cycle efficieny that has so not only influenced boiler efficiency and power plant has also increased coal-fired use amount.In order to solve the problem that flue-gas temperature raises, a lot of power plant are provided with economizer in flue, utilize economizer with flue gas cool-down, but traditional economizer in use seriously corroded can occur, the problem that service life is short.And traditional economizer also exists that heat exchange efficiency is low, the easy fouling of heat-exchanging tube bundle, equipment manufacturing cost and the high shortcoming of maintenance cost.
The utility model content
The purpose of this utility model is, a kind of low-level (stack-gas) economizer is provided, and the heat energy that it can the recovery boiler flue gas reduces the exhaust gas temperature of boiler, improve the cycle efficieny in power plant, and have corrosion-resistant, long service life, be difficult for fouling and the little advantage of equipment investment.
The technical solution of the utility model, a kind of low-level (stack-gas) economizer, comprise housing, high-temperature heat exchange tube bundle, low-temperature heat exchange tube bank, water inlet, delivery port, be provided with 1～4 group of high-temperature heat exchange tube bundle and 1～4 group of low-temperature heat exchange tube bank in the housing, high-temperature heat exchange tube bundle and low-temperature heat exchange tube bank all are connected in series by tube connector, be equipped with delivery port on every group of high-temperature heat exchange tube bundle, be equipped with water inlet in every group of low-temperature heat exchange tube bank, be equipped with soot blower between high-temperature heat exchange tube bundle and the low-temperature heat exchange tube bank.Owing to be mingled with a large amount of dusts in the flue gas, dust is easy to attached on the heat-exchanging tube bundle, when the dust on the heat-exchanging tube bundle save bit by bit more and more the time, can influence the heat exchange efficiency of heat-exchanging tube bundle, therefore soot blower is set prevents dust attached on the heat-exchanging tube bundle, thereby has guaranteed the heat exchange efficiency of low-level (stack-gas) economizer.
In the aforesaid low-level (stack-gas) economizer, be provided with the tube bank of 2 groups of high-temperature heat exchange tube bundles and 2 groups of low-temperature heat exchanges in the housing, every group of high-temperature heat exchange tube bundle and low-temperature heat exchange tube bank all are connected in series by tube connector.
In the aforesaid low-level (stack-gas) economizer, high-temperature heat exchange tube bundle and low-temperature heat exchange tube bank all adopt the ratio-frequency welding finned tube to be made.The purpose that adopts the ratio-frequency welding finned tube is in order to have increased heat exchange area, to have reduced the size of low-level (stack-gas) economizer, having reduced equipment manufacturing cost.
In the aforesaid low-level (stack-gas) economizer, the tube wall of the heat-exchanging tube bundle in the high-temperature heat exchange tube bundle outside is 2 times of other heat-exchanging tube bundle tube wall thickness.Because the heat-exchanging tube bundle in the high-temperature heat exchange tube bundle outside at first contacts with flue gas, the corrosion that is subjected to flue gas is more serious than other tube banks, and therefore the wall thickness with outside heat-exchanging tube bundle increases, and strengthens the resistance to corrosion of outside heat-exchanging tube bundle.
In the aforesaid low-level (stack-gas) economizer, the heat exchanger tube of low-temperature heat exchange tube bank adopts the ND steel to form.Contain the Cu element in the ND steel, the Cu element can improve corrosion resistance, because Cu forms the Cu2S film on the surface of steel, can suppress anode reaction.The ND steel has fine and close interior phakopsora structure, and barrier propterty is preferably arranged; The heat-exchanging tube bundle of low-level (stack-gas) economizer adopts the ND steel to make, and the life-span is long, safe and reliable, can realize the long period safe operation of equipment.The ND steel has the premium properties of anti-low-temperature dew point corrosion, has wide suitable prospect.
In the aforesaid low-level (stack-gas) economizer, soot blower adopts steam sootblower or acoustic wave ash ejector.
Compared with prior art, heat exchanger tube of the present utility model adopts the ratio-frequency welding finned tube, can expand the heat exchange area 5-15 of light pipe (be generally doubly) significantly, thereby the heat transfer area of low-level (stack-gas) economizer is increased, volume significantly reduces, and compact conformation has reduced the quantity of pressurized elbow, weld seam quantity, thus the probability that leaks reduced.Because flue gas forms boundary-layer when flowing through finned tube, produce vortex, seldom therefore the chance that fly ash granule strikes tube wall is difficult for fouling.The fume side flow resistance is little, can satisfy existing boiler induced-draft fan service requirement, reduces the power consumption that therefore increases.And the utility model can be according to the size of flue true form flexible design designing apparatus, and equipment investment is little, and payoff period is short, is generally 2-4.
Description of drawings
Fig. 1 is a front view of the present utility model;
Fig. 2 is a vertical view of the present utility model;
Fig. 3 is a side view of the present utility model.
Being labeled as in the accompanying drawing: 1-housing, 2-high-temperature heat exchange tube bundle, the tube bank of 3-low-temperature heat exchange, 4-water inlet, 5-delivery port, 6-tube connector, 7-soot blower.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is further described.
Steam sootblower and acoustic wave ash ejector all can be bought acquisition on market.
Operation principle of the present utility model: low-level (stack-gas) economizer is a basic heat exchange principle of utilizing thermal conduction study, and the outer high-temperature flue gas of condensate water in the heat-exchanging tube bundle and pipe carries out exchange heat by tube wall.At first low-level (stack-gas) economizer is installed in the back-end ductwork of boiler, flue gas enters low-level (stack-gas) economizer, condensate water enters low-temperature heat exchange tube bank 3 from water inlet 4, enter high-temperature heat exchange tube bundle 2 by tube connector 6 then, condensate water produces heat exchange by tube wall and high-temperature flue gas in flow process, with the temperature reduction of flue gas.Water (flow) direction of the present utility model is opposite with the flow of flue gas direction, and the mean temperature difference that this arrangement can make the mean temperature difference of low-level (stack-gas) economizer arrange than following current is big, and effectively conserve space reduces heat exchange area, makes heat exchange more abundant.
Claims (6)
1. low-level (stack-gas) economizer, it is characterized in that: comprise housing (1), high-temperature heat exchange tube bundle (2), low-temperature heat exchange tube bank (3), water inlet (4), delivery port (5), be provided with 1～4 group of high-temperature heat exchange tube bundle (2) and 1～4 group of low-temperature heat exchange tube bank (3) in the housing (1), high-temperature heat exchange tube bundle (2) and low-temperature heat exchange tube bank (3) are connected in series by tube connector (6), be equipped with delivery port (5) on every group of high-temperature heat exchange tube bundle (2), be equipped with water inlet (4) in every group of low-temperature heat exchange tube bank (3), be equipped with soot blower (7) between high-temperature heat exchange tube bundle (2) and the low-temperature heat exchange tube bank (3).
2. low-level (stack-gas) economizer according to claim 1 is characterized in that: be provided with 2 groups of high-temperature heat exchange tube bundles (2) and 2 groups of low-temperature heat exchange tube banks (3) in the housing (1), high-temperature heat exchange tube bundle (2) and low-temperature heat exchange tube bank (3) all are connected in series by tube connector (6).
3. low-level (stack-gas) economizer according to claim 1 and 2 is characterized in that: high-temperature heat exchange tube bundle (2) and low-temperature heat exchange tube bank (3) all adopt the ratio-frequency welding finned tube to be made.
4. low-level (stack-gas) economizer according to claim 1 is characterized in that: the tube wall of the heat-exchanging tube bundle in the close outside of high-temperature heat exchange tube bundle (2) is 2 times of other heat-exchanging tube bundle pipe thickness.
5. low-level (stack-gas) economizer according to claim 1 is characterized in that: the heat exchanger tube of low-temperature heat exchange tube bank (3) adopts the ND steel to form.
6. low-level (stack-gas) economizer according to claim 1 is characterized in that: soot blower (7) adopts steam sootblower or acoustic wave ash ejector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120028085 CN201954524U (en) | 2011-01-27 | 2011-01-27 | Low-temperature economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120028085 CN201954524U (en) | 2011-01-27 | 2011-01-27 | Low-temperature economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201954524U true CN201954524U (en) | 2011-08-31 |
Family
ID=44498634
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120028085 Expired - Fee Related CN201954524U (en) | 2011-01-27 | 2011-01-27 | Low-temperature economizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201954524U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114110556A (en) * | 2021-11-17 | 2022-03-01 | 清华大学 | Combined spiral finned tube low-temperature economizer |
-
2011
- 2011-01-27 CN CN 201120028085 patent/CN201954524U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114110556A (en) * | 2021-11-17 | 2022-03-01 | 清华大学 | Combined spiral finned tube low-temperature economizer |
| CN114110556B (en) * | 2021-11-17 | 2023-01-10 | 清华大学 | Combined spiral finned tube low-temperature economizer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100035, B, building 5, Huadian building, No. 273 Xizhimen Main Street, Beijing, Xicheng District Patentee after: Huadian Environmental Protection System Engineering Co., Ltd. Patentee after: CHINA HUADIAN ENGINEERING CO., LTD. Address before: 100035, B, building 5, Huadian building, No. 273 Xizhimen Main Street, Beijing, Xicheng District Patentee before: Huadian Environmental Protection System Engineering Co., Ltd. Patentee before: China Huadian Engineering (Group) Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110831 Termination date: 20200127 |