CN203810375U - Efficient zero-dew point corrosion coal economizer - Google Patents
Efficient zero-dew point corrosion coal economizer Download PDFInfo
- Publication number
- CN203810375U CN203810375U CN201420155537.0U CN201420155537U CN203810375U CN 203810375 U CN203810375 U CN 203810375U CN 201420155537 U CN201420155537 U CN 201420155537U CN 203810375 U CN203810375 U CN 203810375U
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- Prior art keywords
- economizer
- pipeline
- heat exchanger
- temperature
- heat
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- 230000007797 corrosion Effects 0.000 title claims abstract description 30
- 238000005260 corrosion Methods 0.000 title claims abstract description 30
- 239000003245 coal Substances 0.000 title abstract 12
- 239000002253 acid Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 5
- 239000003546 flue gas Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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- Control Of Steam Boilers And Waste-Gas Boilers (AREA)
Abstract
The utility model discloses an efficient zero-dew point corrosion coal economizer which comprises a coal economizer, a heat exchanger, a first pipeline, a second pipeline and a third pipeline. The high-temperature heat source inlet of the heat exchanger is connected with the third pipeline, the heat source outlet of the heat exchanger is connected with a heat source outlet pipeline, and the cold source inlet of the heat exchanger is connected with a low temperature boiler feeding pipe; the inlet of the coal economizer is connected with the cold source outlet of the heat exchanger through a first pipeline, and the outlet of the coal economizer is connected with a high-temperature section coal economizer through the second pipeline; a high-temperature heat source medium flows out of the heat exchanger through the heat source outlet pipeline after entering the heat exchanger for heat exchange and temperature reduction through the third pipeline; the temperature of boiler feeding water reaches to an acid dew point temperature of the coal economizer through heat exchanging and heating of the heat exchanger, and then flows out of the heat exchanger from the cold source outlet of the heat exchanger, then enters the coal economizer through the first pipeline, then flows out of the coal economizer through the outlet of the coal economizer after absorbing the heat of the coal economizer, and finally enters into a boiler steam pocket or a high-temperature coal economizer through the second pipeline.
Description
Technical field
The utility model relates to one efficiently without dew point corrosion economizer.
Background technology
For reclaim in oil refining, chemical industry, cement and metallurgical technology, produce in, low-temperature flue gas waste heat, conventionally adopt economizer.But if adopt common economizer, low temperature boiler feedwater directly enters economizer not through preheating in the situation that, because conventionally containing a small amount of SO in flue gas
2/ SO
3, easily causing the low-temperature dew point corrosion of economizer, thereby reduce the economizer life-span, serious generation equipment corrosion is revealed.We have developed the efficient technological process without dew point corrosion economizer specially for this reason, set up heat exchanger, utilize the heat heating economizer import low temperature feedwater of high temperature heat source, improve the actual feed temperature of economizer, thereby guarantee that the minimum tube wall temperature of economizer is higher than dew-point temperature, thoroughly avoid economizer to produce dew point corrosion.
Utility model content
The purpose of this utility model is to overcome the defect of prior art and provides one efficiently without dew point corrosion economizer, it utilizes the high temperature heat source of heat exchanger to heat the low temperature boiler feedwater of economizer, make the minimum tube wall temperature of economizer higher than dew-point temperature, thereby avoid low-temperature dew point corrosion.
The purpose of this utility model is achieved in that one is efficiently without dew point corrosion economizer, comprises economizer, heat exchanger, the first to the 3rd pipeline, wherein,
The high temperature heat source import of described heat exchanger connects described the 3rd pipeline, and the thermal source outlet of this heat exchanger connects a thermal source outlet conduit, and the low-temperature receiver entrance of this heat exchanger connects a low temperature boiler feedwater pipeline;
The entrance of described economizer is connected with the low-temperature receiver outlet of described heat exchanger by described the first pipeline, and the outlet of described economizer connects boiler-steam dome or high-temperature economizer by described second pipe;
The heat exchange cooling that high temperature heat source medium enters described heat exchanger by the 3rd pipeline is rear by described thermal source outlet conduit outflow heat exchanger; More than the described heat exchanger heat exchange of boiler feedwater process is heated and is elevated to the acid dew-point temperature of economizer, then export outflow heat exchanger from the low-temperature receiver of described heat exchanger, enter described economizer by described the first pipeline again, then after absorbing the heat of economizer, flow out economizer by the outlet of economizer, finally enter boiler-steam dome or high-temperature economizer by described second pipe.
Above-mentioned is efficient without dew point corrosion economizer, wherein, on described the 3rd pipeline, a flow control device is also set, and this flow control device is an automatic or manual control valve.
Above-mentioned is efficient without dew point corrosion economizer, wherein, a flow switch is set respectively on described the first pipeline, second pipe and between the first pipeline and second pipe, and this flow switch is an automatic or manual control valve.
Above-mentioned is efficient without dew point corrosion economizer, and wherein, the low-temperature receiver entrance of described heat exchanger and low-temperature receiver outlet arrange respectively a temperature indicator.
Above-mentioned is efficient without dew point corrosion economizer, wherein, between described low temperature boiler feedwater pipeline and described the first pipeline and between described the 3rd pipeline and described thermal source outlet conduit, a bypass adjusting device is set respectively.
The efficient technical scheme without dew point corrosion economizer of the present utility model, set up heat exchanger, utilize the low temperature boiler feedwater of the high temperature heat source heating economizer of heat exchanger, boiler feedwater after being preheated enters economizer and flue gas heat exchange again, makes boiler feedwater after economizer heat exchange, enter boiler-steam dome or high-temperature economizer.The efficient actual feed temperature that has improved economizer without dew point corrosion economizer of the present utility model, thereby guarantee that the minimum tube wall temperature of economizer is higher than dew-point temperature, thoroughly avoid economizer corrosion, economizer is moved under the state without low-temperature dew point corrosion, the life-span is long, reliability is higher.
Brief description of the drawings
Fig. 1 is the efficient structural representation without dew point corrosion economizer of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Refer to Fig. 1, one of the present utility model, efficiently without dew point corrosion economizer, comprises economizer 1, heat exchanger 2, the first to the 3rd pipeline 7～9, wherein:
The high temperature heat source import of heat exchanger 1 connects the 3rd pipeline 9, and the thermal source outlet of this heat exchanger 2 connects a thermal source outlet conduit 10, and the low-temperature receiver entrance of this heat exchanger 2 connects a low temperature boiler feedwater pipeline 11; The entrance of this economizer 1 is connected with the low-temperature receiver outlet of heat exchanger 2 by the first pipeline 7, and the outlet of economizer 1 connects boiler-steam dome or high-temperature economizer by second pipe 8;
One flow switch 4 is set respectively on the first pipeline 7, second pipe 8 and between the first pipeline 7 and second pipe 8, and this flow switch 4 can be a hand-operated valve or control valve;
The heat exchange cooling that high temperature heat source medium enters heat exchanger 2 by the 3rd pipeline 9 is rear by thermal source pipeline 10 outflow heat exchangers 2; More than 2 heat exchange of boiler feedwater process heat exchanger are heated and are elevated to the acid dew-point temperature of economizer 1, then export outflow heat exchanger 2 from the low-temperature receiver of heat exchanger 2, enter economizer 1 by the first pipeline 7 again, then after absorbing the flue gas heat of economizer 1, flow out economizer 1 by the outlet of economizer 1, finally enter boiler-steam dome or high-temperature economizer by second pipe 8.
In the time that economizer 1 breaks down, the flow switch 4 arranging between the flow switch 4 arranging on the first pipeline 7 and second pipe 8 and the first pipeline 7 and second pipe 8, can excise out this section of economizer 1, does not participate in heat exchange.
One flow control device 5 is set on the 3rd pipeline 9, this flow control device 5 is automatic or manual control valves 5, in low-temperature receiver entrance and the low-temperature receiver outlet of heat exchanger 2, a temperature indicator 6 is set respectively simultaneously, regulate the flow of the high temperature heat source medium that enters heat exchanger 2 by flow control device 5, the temperature of heated low temperature feedwater is remained on dew-point temperature;
One bypass adjusting device 3 is set between low temperature boiler feed pipe 11 and the first pipeline 7 and a bypass adjusting device 3 is set respectively between the 3rd pipeline 9 and thermal source outlet conduit 10, when the temperature of boiler feedwater reaches the acid dew-point temperature of economizer 1 when above, can directly not enter economizer 1 by the heat exchange of heat exchanger 2, now high temperature heat source medium also can directly flow out from thermal source outlet conduit 10.
Of the present utility model efficient without dew point corrosion economizer, utilize the low temperature boiler feedwater of the high temperature heat source heating economizer of heat exchanger, boiler feedwater after being preheated enters economizer and flue gas heat exchange again, makes boiler feedwater after economizer heat exchange, enter boiler-steam dome or high-temperature economizer.The efficient actual feed temperature that has improved economizer without dew point corrosion economizer of the present utility model, thereby guarantee that the minimum tube wall temperature of economizer is higher than dew-point temperature, thoroughly avoid economizer corrosion, economizer is moved under the state without low-temperature dew point corrosion, the life-span is long, reliability is higher.
Above embodiment is only for illustration of the utility model, but not to restriction of the present utility model, person skilled in the relevant technique, in the situation that not departing from spirit and scope of the present utility model, can also make various conversion or modification, therefore all be equal to or similarly technical scheme also should belong to category of the present utility model, should be limited by each claim.
Claims (5)
1. efficiently without a dew point corrosion economizer, comprise economizer, heat exchanger, the first to the 3rd pipeline, it is characterized in that,
The high temperature heat source import of described heat exchanger connects described the 3rd pipeline, and the thermal source outlet of this heat exchanger connects a thermal source outlet conduit, and the low-temperature receiver entrance of this heat exchanger connects a low temperature boiler feedwater pipeline;
The entrance of described economizer is connected with the low-temperature receiver outlet of described heat exchanger by described the first pipeline, and the outlet of described economizer connects high temperature section economizer by described second pipe;
High temperature heat source medium passes through described thermal source outlet conduit outflow heat exchanger after entering described heat exchanger heat exchange cooling by the 3rd pipeline; More than the described heat exchanger heat exchange of boiler feedwater process is heated and is elevated to the acid dew-point temperature of economizer, then export outflow heat exchanger from the low-temperature receiver of described heat exchanger, enter described economizer by described the first pipeline again, then after absorbing the heat of economizer, flow out economizer by the outlet of economizer, finally enter boiler-steam dome or high-temperature economizer by described second pipe.
2. according to claim 1 efficiently it is characterized in that without dew point corrosion economizer, on described the 3rd pipeline, a flow control device is also set, this flow control device is an automatic or manual control valve.
3. according to claim 1 efficiently it is characterized in that without dew point corrosion economizer, a flow switch is set respectively on described the first pipeline, second pipe and between the first pipeline and second pipe, and this flow switch is an automatic or manual control valve.
4. according to claim 1 efficiently it is characterized in that without dew point corrosion economizer, the low-temperature receiver entrance of described heat exchanger and low-temperature receiver outlet arrange respectively a temperature indicator.
5. according to claim 1 efficiently it is characterized in that without dew point corrosion economizer, between described low temperature boiler feedwater pipeline and described the first pipeline and between described the 3rd pipeline and described thermal source outlet conduit, a bypass adjusting device is set respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420155537.0U CN203810375U (en) | 2014-04-01 | 2014-04-01 | Efficient zero-dew point corrosion coal economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420155537.0U CN203810375U (en) | 2014-04-01 | 2014-04-01 | Efficient zero-dew point corrosion coal economizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203810375U true CN203810375U (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420155537.0U Expired - Lifetime CN203810375U (en) | 2014-04-01 | 2014-04-01 | Efficient zero-dew point corrosion coal economizer |
Country Status (1)
| Country | Link |
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| CN (1) | CN203810375U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107631287A (en) * | 2017-09-29 | 2018-01-26 | 苏州海陆重工股份有限公司 | The waterworks of boiler economizer |
-
2014
- 2014-04-01 CN CN201420155537.0U patent/CN203810375U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107631287A (en) * | 2017-09-29 | 2018-01-26 | 苏州海陆重工股份有限公司 | The waterworks of boiler economizer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170816 Address after: Jinhui town Fengxian District Shanghai city 201403 North Village four group B -28 Co-patentee after: ZHEJIANG NINGSONG HEAT ENERGY BOILER EQUIPMENT CO.,LTD. Patentee after: SHANGHAI NINGSONG THERMAL & ENVIRONMENTAL ENGINEERING CO.,LTD. Address before: Jinhui town Fengxian District Shanghai city 201403 North Village four group B -28 Patentee before: SHANGHAI NINGSONG THERMAL & ENVIRONMENTAL ENGINEERING CO.,LTD. |
|
| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140903 |
|
| CX01 | Expiry of patent term |