CN204420961U - A kind of high-sulfur fume afterheat electricity generation boiler anti-low-temperature corrosion device - Google Patents
A kind of high-sulfur fume afterheat electricity generation boiler anti-low-temperature corrosion device Download PDFInfo
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- CN204420961U CN204420961U CN201420841056.5U CN201420841056U CN204420961U CN 204420961 U CN204420961 U CN 204420961U CN 201420841056 U CN201420841056 U CN 201420841056U CN 204420961 U CN204420961 U CN 204420961U
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Abstract
The utility model discloses a kind of high-sulfur fume afterheat electricity generation boiler anti-low-temperature corrosion device, economizer (4) is comprised in boiler of power generation by waste heat (1), high pressure drum (7) outside boiler of power generation by waste heat is connected with low pressure drum (6), the entrance of boiler feed pump (8) is connected with the outlet of low pressure drum, water water-to-water heat exchanger (9) is provided with outside boiler of power generation by waste heat, boiler feedwater delivery side of pump, the low-temperature receiver water inlet of water water-to-water heat exchanger, low-temperature receiver delivery port, economizer, the thermal source water inlet of water water-to-water heat exchanger, thermal source delivery port is connected successively with high pressure drum, make high pressure drum, low pressure drum, boiler feed pump, water water-to-water heat exchanger and economizer form boiler supply water deaerating pre-heating system, the thermal source of oxygen-eliminating device directly provides saturated vapor to realize by high pressure drum, the operating temperature of boiler feed pump is the leaving water temperature of low pressure drum, and ensure the safe operation of boiler feed pump, due to the heat exchange effect of water water-to-water heat exchanger, the coolant-temperature gage that enters of economizer is greater than flue gas dew point temperature, avoids it to occur cold end corrosion phenomenon.
Description
Technical field
The utility model relates to fume afterheat power field, specifically a kind of high-sulfur fume afterheat electricity generation boiler anti-low-temperature corrosion device.
Background technology
Known, generally high-temperature flue gas is inputted boiler of power generation by waste heat at fume afterheat power field and carry out the object that heat exchange generation superheated steam realizes cogeneration; When the fuel of boiler of power generation by waste heat front end be natural gas or coal gas time, the SO in flue gas
2and SO
3comparision contents is low, and corresponding flue gas dew point is also lower; When the fuel of boiler of power generation by waste heat front end is heavy oil, residual oil, tar or petroleum coke powder, SO in flue gas
2and SO
3content can be higher, so corresponding flue gas dew point is also higher, large between 150 ~ 160 DEG C, even higher, now in boiler of power generation by waste heat, the operating pressure of low pressure evaporator wants>=0.55MPa (g), namely operating temperature about wants>=162 DEG C, and the heat exchange surface of guarantee low pressure evaporator is not in below flue gas dew point temperature, just can avoid cold end corrosion; If but work at this temperature, boiler feed pump just runs under extreme conditions, and under extreme conditions, the expansion of the pump housing can increase interruption of service and the frequency of maintenance of feed pump to longtime running, almost can not longtime running.
In order to solve the problem, the low pressure evaporator of most of boiler of power generation by waste heat is forced to cooling and runs, the heat-transfer surface of low pressure evaporator is made to be in environment lower than flue gas dew point temperature, result cold end corrosion causes heat-transfer surface to penetrate booster in a large number very soon, frequent shutoff or replacing, have a strong impact on the cycle of operation of boiler of power generation by waste heat.
Utility model content
The purpose of this utility model is to provide a kind of high-sulfur fume afterheat electricity generation boiler anti-low-temperature corrosion device, and this device can prevent boiler from occurring cold end corrosion when using high-sulfur flue gas, and makes boiler feed pump safe operation simultaneously.
The utility model solves the technical scheme that its technical problem adopts:
A kind of high-sulfur fume afterheat electricity generation boiler anti-low-temperature corrosion device, economizer is comprised in boiler of power generation by waste heat, high pressure drum outside boiler of power generation by waste heat is communicated with by saturated steam pipe with low pressure drum, the entrance of boiler feed pump is connected with the outlet of low pressure drum, described anti-low-temperature corrosion device also comprises the water water-to-water heat exchanger be located at outside boiler of power generation by waste heat, boiler feedwater delivery side of pump is connected with the low-temperature receiver water inlet of water water-to-water heat exchanger, the low-temperature receiver delivery port of water water-to-water heat exchanger is connected with the entrance of economizer, the outlet of economizer is connected with the thermal source water inlet of water water-to-water heat exchanger, the thermal source delivery port of water water-to-water heat exchanger is connected with the entrance of high pressure drum, make high pressure drum, low pressure drum, boiler feed pump, water water-to-water heat exchanger and economizer form boiler supply water deaerating pre-heating system.
The beneficial effects of the utility model are, cancel the low pressure evaporator in traditional boiler of power generation by waste heat, by arranging water water-to-water heat exchanger at the port of export of boiler feed pump, high pressure drum, low pressure drum, boiler feed pump, water water-to-water heat exchanger and economizer is made to form boiler supply water deaerating pre-heating system, on the one hand, the thermal source of oxygen-eliminating device directly provides saturated vapor to realize by high pressure drum; On the other hand, the operating temperature of boiler feed pump is the leaving water temperature of low pressure drum, far below the limiting value of boiler feed pump, ensure the safe operation of boiler feed pump, meanwhile, due to the heat exchange effect of water water-to-water heat exchanger, the coolant-temperature gage that enters of economizer is greater than flue gas dew point temperature, avoids it to occur cold end corrosion phenomenon.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated:
Fig. 1 is the structural representation of the utility model embodiment.
Detailed description of the invention
As shown in Figure 1, the utility model provides a kind of high-sulfur fume afterheat electricity generation boiler anti-low-temperature corrosion device, superheater 2 is comprised in boiler of power generation by waste heat 1, evaporimeter 3 and economizer 4, high pressure drum 7 outside boiler of power generation by waste heat 1 is communicated with by saturated steam pipe 10 with low pressure drum 6, the entrance of boiler feed pump 8 is connected with the outlet of low pressure drum 6, described anti-low-temperature corrosion device also comprises the water water-to-water heat exchanger 9 be located at outside boiler of power generation by waste heat 1, the outlet of boiler feed pump 8 is connected with the low-temperature receiver water inlet of water water-to-water heat exchanger 9, the low-temperature receiver delivery port of water water-to-water heat exchanger 9 is connected with the entrance of economizer 4, the outlet of economizer 4 is connected with the thermal source water inlet of water water-to-water heat exchanger 9, the thermal source delivery port of water water-to-water heat exchanger 9 is connected with the entrance of high pressure drum 7, make high pressure drum 7, low pressure drum 6, boiler feed pump 8, water water-to-water heat exchanger 9 and economizer 4 form boiler supply water deaerating pre-heating system.
Cancel the low pressure evaporator in traditional boiler of power generation by waste heat, the thermal source of oxygen-eliminating device 5 directly provides saturated vapor to realize by high pressure drum 7; Industry water (about 130 ~ 140 DEG C) through oxygen-eliminating device 5 deoxygenation enters water water-to-water heat exchanger 9 by boiler feed pump 8, and now the operating temperature of boiler feed pump 8 is lower than its limiting value, can safe operation; The coolant-temperature gage entering water water-to-water heat exchanger 9 is heated to about 165 ~ 175 DEG C, enter economizer 4 afterwards and carry out heat exchange with flue gas, temperature is left economizer 4 after being heated to about 200 ~ 210 DEG C and is returned water water-to-water heat exchanger 9, heat exchange is carried out with the water of 130 ~ 140 DEG C from low pressure drum 6, after transferring heat to the hot water of relative low temperature, temperature reduces to about 165 ~ 175 DEG C, then high pressure drum 7 is entered, saturated vapor is inputted oxygen-eliminating device 5 by saturated steam pipe 10 and provides deoxygenation thermal source by high pressure drum 7, thus forms boiler supply water deaerating pre-heating system; Due to water before entering economizer 4 by water water-to-water heat exchanger 9 heat exchange to 165 ~ 175 DEG C, be greater than the temperature of flue gas dew point, thus there will not be cold end corrosion phenomenon.
The above is only preferred embodiment of the present utility model, not does any pro forma restriction to the utility model; Any those of ordinary skill in the art, do not departing under technical solutions of the utility model ambit, the Method and Technology content of above-mentioned announcement all can be utilized to make many possible variations and modification to technical solutions of the utility model, or be revised as the Equivalent embodiments of equivalent variations.Therefore; every content not departing from technical solutions of the utility model; according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent replacement, equivalence change and modification, all still belong in the scope of technical solutions of the utility model protection.
Claims (1)
1. a high-sulfur fume afterheat electricity generation boiler anti-low-temperature corrosion device, economizer (4) is comprised in boiler of power generation by waste heat (1), boiler of power generation by waste heat (1) high pressure drum (7) is outward communicated with by saturated steam pipe (10) with low pressure drum (6), the entrance of boiler feed pump (8) is connected with the outlet of low pressure drum (6), it is characterized in that, described anti-low-temperature corrosion device also comprises is located at boiler of power generation by waste heat (1) water water-to-water heat exchanger (9) outward, the outlet of boiler feed pump (8) is connected with the low-temperature receiver water inlet of water water-to-water heat exchanger (9), the low-temperature receiver delivery port of water water-to-water heat exchanger (9) is connected with the entrance of economizer (4), the outlet of economizer (4) is connected with the thermal source water inlet of water water-to-water heat exchanger (9), the thermal source delivery port of water water-to-water heat exchanger (9) is connected with the entrance of high pressure drum (7), make high pressure drum (7), low pressure drum (6), boiler feed pump (8), water water-to-water heat exchanger (9) and economizer (4) form boiler supply water deaerating pre-heating system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420841056.5U CN204420961U (en) | 2014-12-27 | 2014-12-27 | A kind of high-sulfur fume afterheat electricity generation boiler anti-low-temperature corrosion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420841056.5U CN204420961U (en) | 2014-12-27 | 2014-12-27 | A kind of high-sulfur fume afterheat electricity generation boiler anti-low-temperature corrosion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204420961U true CN204420961U (en) | 2015-06-24 |
Family
ID=53471328
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420841056.5U Expired - Fee Related CN204420961U (en) | 2014-12-27 | 2014-12-27 | A kind of high-sulfur fume afterheat electricity generation boiler anti-low-temperature corrosion device |
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| CN (1) | CN204420961U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109268094A (en) * | 2017-07-17 | 2019-01-25 | 斗山重工业建设有限公司 | Prevent the supercritical carbon dioxide electricity generation system of low-temperature corrosion |
-
2014
- 2014-12-27 CN CN201420841056.5U patent/CN204420961U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109268094A (en) * | 2017-07-17 | 2019-01-25 | 斗山重工业建设有限公司 | Prevent the supercritical carbon dioxide electricity generation system of low-temperature corrosion |
| CN109268094B (en) * | 2017-07-17 | 2022-04-12 | 斗山重工业建设有限公司 | Supercritical carbon dioxide power generation system capable of preventing low-temperature corrosion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150624 Termination date: 20151227 |
|
| EXPY | Termination of patent right or utility model |