CN202361351U - Device for reducing coal consumption by utilizing waste heat of boiler - Google Patents
Device for reducing coal consumption by utilizing waste heat of boiler Download PDFInfo
- Publication number
- CN202361351U CN202361351U CN2011205008317U CN201120500831U CN202361351U CN 202361351 U CN202361351 U CN 202361351U CN 2011205008317 U CN2011205008317 U CN 2011205008317U CN 201120500831 U CN201120500831 U CN 201120500831U CN 202361351 U CN202361351 U CN 202361351U
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- heating system
- boiler
- economizer
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Abstract
The utility model discloses a device for reducing coal consumption by utilizing waste heat of boiler. The device comprises the boiler, a duster, a low-temperature economizer and a desulfurizing tower which are successively communicated through flues, The device also comprises a low-pressure water feed heating system, a condenser and a deaerator, wherein the condenser is communicated with the low-pressure water feed water heating system through a first water inlet pipe, and the low-pressure water feed heating system is communicated with the deaerator through a first water outlet pipe; the deaerator is communicated with the boiler through a third water outlet pipe, and the low-pressure water feed heating system is communicated with a first water inlet of the low-temperature economizer through a second water inlet pipe; and a first water outlet of the low-temperature economizer is communicated with the low-pressure water feed heating system through a second water outlet pipe. According to the utility model, the low-pressure water feed heating system is connected in parallel with the low-temperature economizer, and water passing through the low-pressure water feed heating system is heated and a part of the water enters the low-temperature economizer to be heated simultaneously; and the sucking rate of the low-pressure water feed heating system is reduced, the heat of exhausted fume in the boiler is fully utilized, and the energy source is saved.
Description
Technical field
The utility model relates to boiler afterheat and utilizes the energy-saving equipment field, particularly relates to a kind of device that utilizes boiler afterheat to practice thrift coal consumption.
Background technology
The high-temperature flue gas that general power plant soot produces is through behind the boiler economizer, and flue-gas temperature is reduced to about 120～160 ℃, and the flue-gas temperature of this part is lower; Just do not utilized, present national power plant is energy-conservation more and more to be paid attention to, and burned coal price rises steadily; Cost of electricity-generating is higher; Therefore be necessary,, exhaust gas temperature be reduced to 90～110 ℃ even lower power plant's low-temperature flue gas heat recovery.Under the prerequisite of assurance device safe and reliable operation, the degree of depth reduces exhaust gas temperature, realizes flue gas waste heat recovery, reaches energy saving purposes.
At present, improve power plant's generating efficiency, one of method of practicing thrift electric coal consumption is exactly to reduce exhaust gas temperature, and is used for generating to this part heat.The method that tradition reduces exhaust gas temperature mainly contains the increase Air Preheater Heating Surface; Strengthen high-pressure economizer heating surface or the like; And the design of the heating surface of boiler of power plant is through the development of decades; Reached optimal design basically, can not change easily otherwise can be to the boiler heating power system, structure causes adverse effect.
The utility model content
For solving the problems of the technologies described above, the utility model provides a kind of a kind of device that utilizes boiler afterheat to practice thrift coal consumption that can fully absorb the boiler emission flue gas heat.
The boiler afterheat that utilizes of the utility model is practiced thrift the device of coal consumption; Comprise the boiler, deduster, low-level (stack-gas) economizer and the desulfurizing tower that are communicated with successively through flue; Also comprise low pressure feed water heating system, condenser and oxygen-eliminating device; Said condenser is communicated with the low pressure feed water heating system through first water inlet pipe, and said low pressure feed water heating system is communicated with oxygen-eliminating device through first outlet pipe, and said oxygen-eliminating device is communicated with boiler through the 3rd outlet pipe; The low pressure feed water heating system is communicated with first water inlet of said low-level (stack-gas) economizer through second water inlet pipe, and first delivery port of low-level (stack-gas) economizer is communicated with the low pressure feed water heating system through second outlet pipe.
Further, said low pressure feed water heating system comprises at least two low-pressure heaters, is cascaded through pipeline between the said low-pressure heater.
Further, first water inlet of said low-level (stack-gas) economizer is communicated with pipeline between the low-pressure heater through second water inlet pipe, and first delivery port of low-level (stack-gas) economizer is communicated with through first outlet pipe that second outlet pipe and low pressure heat a side.
Further, be provided with booster pump and control valve successively on the 3rd outlet pipe between said oxygen-eliminating device and the boiler.
Further, be provided with booster pump and control valve successively on second water inlet pipe between said low-level (stack-gas) economizer and the low-pressure heater.
Further, the flue between said low-level (stack-gas) economizer and the desulfurizing tower is provided with air-introduced machine.
Further, be provided with spiral helicine water service pipe in the said low-level (stack-gas) economizer, an end of said water service pipe is communicated with first water inlet, and the other end of water service pipe is communicated with first delivery port.
Compared with prior art the beneficial effect of the utility model is:
The boiler afterheat that utilizes of the utility model is practiced thrift the device of coal consumption; Through the low pressure feed water heating system is parallelly connected with low-level (stack-gas) economizer; Water through the low pressure feed water heating system also has part to get in the low-level (stack-gas) economizer when being heated to be heated, and a large amount of fume afterheats get into low adding system, and this part heat is converted into electric work with certain efficient; Make full use of the heat of discharging flue gas in the boiler, practiced thrift the energy.
Description of drawings
Fig. 1 is the flow chart of the utility model.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the utility model is described in further detail.Following examples are used to explain the utility model, but are not used for limiting the scope of the utility model.
As shown in Figure 1; A kind of device that utilizes boiler afterheat to practice thrift coal consumption; Comprise the boiler 1, sack cleaner 2, low-level (stack-gas) economizer 3, desulfurizing tower 4, condenser 5, oxygen-eliminating device 6, the low pressure feed water heating system 7 that are communicated with successively through flue; Low pressure feed water heating system in the present embodiment comprises first low-pressure heater 8, second low-pressure heater 9, the 3rd low-pressure heater 10 and the 4th low-pressure heater 11; Condenser 5 is communicated with a side of first low-pressure heater 8 through first water inlet pipe 12; The opposite side of first low-pressure heater 8 is series at through pipeline between second low-pressure heater 9, the 3rd low-pressure heater 10 and the 4th low-pressure heater 11 successively, and the opposite side of the 4th low-pressure heater 11 is communicated with oxygen-eliminating device 6 through first outlet pipe 13, and oxygen-eliminating device 6 passes through the 3rd outlet pipe 18 and is communicated with boiler 1; Pipeline between the 3rd low-pressure heater 10 and the 4th low-pressure heater 11 is communicated with first water inlet 15 of low-level (stack-gas) economizer 3 through second water inlet pipe 14, and first delivery port 16 of low-level (stack-gas) economizer 3 passes through second outlet pipe 17 and the 4th low-pressure heater 11 and is communicated with first outlet pipe 13 between the oxygen-eliminating device 6.
The boiler afterheat that utilizes of the utility model is practiced thrift the device of coal consumption, is provided with booster pump 19 and control valve 20 on the 3rd outlet pipe 18 between its oxygen-eliminating device 6 and the boiler 1 successively.
The boiler afterheat that utilizes of the utility model is practiced thrift the device of coal consumption, is provided with booster pump 21 and control valve 22 on second water inlet pipe 14 between its low-level (stack-gas) economizer 3 and the low-pressure heater successively.
The boiler afterheat that utilizes of the utility model is practiced thrift the device of coal consumption, and the flue between its low-level (stack-gas) economizer 3 and the desulfurizing tower 4 is provided with air-introduced machine 23, can control the flow direction of flue gas in the boiler 1.
The boiler afterheat that utilizes of the utility model is practiced thrift the device of coal consumption, is provided with spiral helicine water service pipe 24 in its low-level (stack-gas) economizer 3, and an end of water service pipe 24 is communicated with first water inlet 15, and the other end of water service pipe is communicated with first delivery port 16.
The effect of condenser 5 is, with forming condensate after the steam cooled in the boiler 1.
The effect of control valve is through regulating the flow of condensate, to realize the control to the water yield, the variation of assurance boiler load.
The effect of booster pump is the water-flowing amount that assurance needs, the cascade utilization of realization smoke discharging residual heat.
The boiler afterheat that utilizes of the utility model is practiced thrift the device of coal consumption, during work, in sack cleaner 2, enters the flue gas of 120～160 degree in the boiler 1, and the flue gas after handling through sack cleaner 2 gets in the low-level (stack-gas) economizer 3; When flue gas is in boiler 1 enters sack cleaner 2; Condensing in the condenser 5 heated through first low-pressure heater 8, second low-pressure heater 9 and the 3rd low-pressure heater 10 through first water inlet pipe 12 successively; When condensed water passes through the pipeline between the 3rd low-pressure heater 10 and the 4th low-pressure heater 11; The part of condensed water gets in the spiral helicine water service pipe 24 in the low-level (stack-gas) economizer 3 carries out heat exchange with boiler 1 interior flue gas of discharging; A part is proceeded heating through the 4th low-pressure heater 11, gets into together in the oxygen-eliminating device 6 through first outlet pipe 13 then and handles, at last through in the pipeline in the 3rd outlet pipe 18 entering boilers 1; And flue gas can constantly get in the low-level (stack-gas) economizer 3 and condensed water carries out heat exchange, and the flue gas after the heat exchange gets into desulfurizing tower 4 desulfurization, after chimney discharge, repetitive cycling according to this.
The boiler afterheat that utilizes of the utility model is practiced thrift the device of coal consumption; Through low pressure feed water heating system 7 is parallelly connected with low-level (stack-gas) economizer 3; Water through low pressure feed water heating system 7 also has part to get in the low-level (stack-gas) economizer 3 when being heated to be heated; Reduce the caloric value of low pressure feed water heating system 7, made full use of the heat of discharging flue gas in the boiler 1, practiced thrift the energy.
The above only is the preferred implementation of the utility model; Should be understood that; For those skilled in the art; Under the prerequisite that does not break away from the utility model know-why, can also make some improvement and modification, these improvement and modification also should be regarded as the protection domain of the utility model.
Claims (7)
1. device that utilizes boiler afterheat to practice thrift coal consumption; Comprise the boiler, deduster, low-level (stack-gas) economizer and the desulfurizing tower that are communicated with successively through flue; It is characterized in that: also comprise low pressure feed water heating system, condenser and oxygen-eliminating device; Said condenser is communicated with the low pressure feed water heating system through first water inlet pipe, and said low pressure feed water heating system is communicated with oxygen-eliminating device through first outlet pipe, and said oxygen-eliminating device is communicated with boiler through the 3rd outlet pipe; The low pressure feed water heating system is communicated with first water inlet of said low-level (stack-gas) economizer through second water inlet pipe, and first delivery port of low-level (stack-gas) economizer is communicated with the low pressure feed water heating system through second outlet pipe.
2. the device that utilizes boiler afterheat to practice thrift coal consumption as claimed in claim 1, it is characterized in that: said low pressure feed water heating system comprises at least two low-pressure heaters, is cascaded through pipeline between the said low-pressure heater.
3. the device that utilizes boiler afterheat to practice thrift coal consumption as claimed in claim 2; It is characterized in that: first water inlet of said low-level (stack-gas) economizer is communicated with pipeline between the low-pressure heater through second water inlet pipe, and first delivery port of low-level (stack-gas) economizer is communicated with through first outlet pipe that second outlet pipe and low pressure heat a side.
4. the device that utilizes boiler afterheat to practice thrift coal consumption as claimed in claim 3 is characterized in that: be provided with booster pump and control valve successively on the 3rd outlet pipe between said oxygen-eliminating device and the boiler.
5. the device that utilizes boiler afterheat to practice thrift coal consumption as claimed in claim 4 is characterized in that: be provided with booster pump and control valve successively on second water inlet pipe between said low-level (stack-gas) economizer and the low-pressure heater.
6. the device that utilizes boiler afterheat to practice thrift coal consumption as claimed in claim 5, it is characterized in that: the flue between said low-level (stack-gas) economizer and the desulfurizing tower is provided with air-introduced machine.
7. the device that utilizes boiler afterheat to practice thrift coal consumption as claimed in claim 6, it is characterized in that: be provided with spiral helicine water service pipe in the said low-level (stack-gas) economizer, an end of said water service pipe is communicated with first water inlet, and the other end of water service pipe is communicated with first delivery port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205008317U CN202361351U (en) | 2011-12-06 | 2011-12-06 | Device for reducing coal consumption by utilizing waste heat of boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205008317U CN202361351U (en) | 2011-12-06 | 2011-12-06 | Device for reducing coal consumption by utilizing waste heat of boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202361351U true CN202361351U (en) | 2012-08-01 |
Family
ID=46572535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205008317U Expired - Fee Related CN202361351U (en) | 2011-12-06 | 2011-12-06 | Device for reducing coal consumption by utilizing waste heat of boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202361351U (en) |
-
2011
- 2011-12-06 CN CN2011205008317U patent/CN202361351U/en not_active Expired - Fee Related
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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 | ||
| CP02 | Change in the address of a patent holder |
Address after: 100192 D-3-303 room, Dongsheng science and Technology Park, No. 66 Xiao Dong Road, Beijing, Haidian District, Zhongguancun Patentee after: Beijing Longteng Huachuang Environmental Energy & Technology Co., Ltd. Address before: 100085, building 7, building 18, Anning Road, Qinghe, Beijing, Haidian District 410 Patentee before: Beijing Longteng Huachuang Environmental Energy & Technology Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: 100192, Haidian District, Beijing, 66 West Wing Road, No. 16, 4, Room 401 Patentee after: Beijing Longteng Huachuang Environmental Energy & Technology Co., Ltd. Address before: 100192 D-3-303 room, Dongsheng science and Technology Park, No. 66 Xiao Dong Road, Beijing, Haidian District, Zhongguancun Patentee before: Beijing Longteng Huachuang Environmental Energy & Technology 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: 20120801 Termination date: 20171206 |