CN208920038U - A kind of thermal power plant's combined type Two-way Cycle fume afterheat effective utilization system - Google Patents
A kind of thermal power plant's combined type Two-way Cycle fume afterheat effective utilization system Download PDFInfo
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- CN208920038U CN208920038U CN201821539018.9U CN201821539018U CN208920038U CN 208920038 U CN208920038 U CN 208920038U CN 201821539018 U CN201821539018 U CN 201821539018U CN 208920038 U CN208920038 U CN 208920038U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The utility model discloses a kind of thermal power plant's combined type Two-way Cycle fume afterheat effective utilization systems, the outlet of condensed water input channel and the outlet of Secondary Air steam air heater are connected with the entrance of No. 9 low-pressure heaters, the outlet of No. 9 low-pressure heaters is connected with the entrance of No. 8 low-pressure heaters, the entrance of No. 8 low-pressure heaters exported with No. 7 low-pressure heaters, the entrance of entrance and the two-stage supercharging pump of one-level booster pump is connected, the outlet of two-stage supercharging pump is connected through second level low-level (stack-gas) economizer with the entrance of Secondary Air steam air heater, the outlet of one-level booster pump is connected with the entrance of level-one low-level (stack-gas) economizer back segment, the outlet of level-one low-level (stack-gas) economizer back segment is divided into three tunnels, wherein, the first via is connected with the entrance of one-level booster pump, second tunnel is connected with the entrance of level-one low-level (stack-gas) economizer leading portion, before third road and level-one low-level (stack-gas) economizer The outlet of section and the outlet of No. 7 low-pressure heaters are connected, which can be suitable for the unit for adding bag filter.
Description
Technical field
The utility model belongs to thermal power plant's heat recovery field, is related to more than a kind of thermal power plant's combined type Two-way Cycle flue gas
Hot effective utilization system.
Background technique
Station boiler flue gas loss is that a most important heat loss, the exhaust gas temperature of station boiler are usual in boiler operatiopn
It is 120~150 DEG C, corresponding heat loss is equivalent to the 5%~12% of fuel heat, accounts for the 60%~70% of boiler heat loss.
For the economy for improving power plant, it is necessary to reduce exhaust gas temperature, reduce flue gas loss, therefore low temperature province has all been installed additional in most of power plant
Coal device, to recycle flue gas heat.
Low-level (stack-gas) economizer is one group of heated surface bundle, when flue gas is flowed through herein, is exchanged heat with the water in pipe, to drop
Low smoke temperature improves condensing water temperature.
Low-level (stack-gas) economizer is typically mounted between air preheater outlet and electric precipitation entrance, but for using electrostatic fabric filter
Unit installs low-level (stack-gas) economizer in deduster entrance, it is low and Water vapor condensation occurs flue-gas temperature easily occurs, and then lead to cloth bag
On there is water droplet, adhere to soot particle, it is hardened to occur cloth bag, influences dust removing effects.
In addition, power plant usually needs to install Secondary Air steam air heater, by auxiliary vapour to prevent air preheater from cold end low-temperature corrosion occurs
For the steam of header supply as heating source, when unit starting, need to additionally consume starting trouble fuel.
Therefore, develop that a kind of bag filter unit, to be not required to the extraneous fume afterheat for providing heat source efficient suitable for installing additional
Using system, it is of great significance for improving unit efficiency, promoting economy of power plant.
Utility model content
To solve problems of the prior art, it is double that the purpose of this utility model is to provide a kind of thermal power plant's combined types
Circulating flue gas waste heat effective utilization system, which can be suitable for the unit for adding bag filter, and does not need outer
Boundary provides heat source.
To reach the purpose of this utility model, thermal power plant's combined type Two-way Cycle fume afterheat described in the utility model is efficient
It include that condensed water input channel, Secondary Air steam air heater, No. 9 low-pressure heaters, No. 8 low-pressure heaters, No. 7 low pressure add using system
Hot device, one-level booster pump, two-stage supercharging pump, second level low-level (stack-gas) economizer, level-one low-level (stack-gas) economizer back segment and level-one low-level (stack-gas) economizer
Leading portion；
The outlet of condensed water input channel and the outlet of Secondary Air steam air heater are connected with the entrance of No. 9 low-pressure heaters, and 9
The outlet of number low-pressure heater is connected with the entrance of No. 8 low-pressure heaters, and the outlet of No. 8 low-pressure heaters adds with No. 7 low pressure
The entrance of the entrance of hot device, the entrance of one-level booster pump and two-stage supercharging pump is connected, and the outlet of two-stage supercharging pump is low through second level
Warm economizer is connected with the entrance of Secondary Air steam air heater, the outlet of one-level booster pump and the entrance of level-one low-level (stack-gas) economizer back segment
It is connected, the outlet of level-one low-level (stack-gas) economizer back segment is divided into three tunnels, wherein the first via is connected with the entrance of one-level booster pump,
Second tunnel is connected with the entrance of level-one low-level (stack-gas) economizer leading portion, outlet and No. 7 of the third road with level-one low-level (stack-gas) economizer leading portion
The outlet of low-pressure heater is connected；
Wherein, level-one low-level (stack-gas) economizer leading portion is installed in thermal power plant between bag filter and air-introduced machine, a grade low-temp
Economizer back segment and second level low-level (stack-gas) economizer are located in thermal power plant between air-introduced machine and desulfurizing tower, and level-one low-level (stack-gas) economizer back segment
And second level low-level (stack-gas) economizer is set gradually along flow of flue gas direction, it is pre- that Secondary Air steam air heater is located at pressure fan and air in thermal power plant
Between hot device.
Further include the low province's back-water valve (BWV) of second level and hot air hose bypass valve, wherein one end of hot air hose bypass valve with
The outlet of second level low-level (stack-gas) economizer is connected, one end of the low province's back-water valve (BWV) of second level and the other end and two of hot air hose bypass valve
The outlet of secondary wind steam air heater is connected, and the other end of the low province's back-water valve (BWV) of second level is connected with the entrance of No. 9 low-pressure heaters.
It further include the low province's inlet adjustment valve of level-one and the low province's inlet adjustment valve of second level, wherein the low province's inlet adjustment valve of level-one
One end and one end of the low province's inlet adjustment valve of second level be connected with the outlet of No. 8 low-pressure heaters, the low province's entrance tune of second level
The other end of section valve is connected with the entrance that two-stage supercharging pumps, the other end of the low province's inlet adjustment valve of level-one and one-level booster pump
Entrance is connected.
It further include recycling regulating valve, wherein recycle one end of regulating valve and the outlet of level-one low-level (stack-gas) economizer back segment
It is connected, the other end for recycling regulating valve is connected with the entrance of one-level booster pump.
It further include the low province's bypass valve of level-one and the low province's back-water valve (BWV) of level-one, wherein the one of the low province's bypass valve of level-one
End is connected with the outlet of level-one low-level (stack-gas) economizer back segment, one end province's bypass valve low with level-one of the low province's back-water valve (BWV) of level-one
Outlet and the outlet of level-one low-level (stack-gas) economizer leading portion are connected, the other end of the low province's back-water valve (BWV) of level-one and No. 7 low-pressure heaters
Outlet is connected.
Compared with prior art, the utility model has the following beneficial effects:
When specific operation, cloth bag removes thermal power plant's combined type Two-way Cycle fume afterheat effective utilization system of the utility model
The flue gas of dirt device output is successively through the heat exchange of level-one low-level (stack-gas) economizer leading portion, air-introduced machine, level-one low-level (stack-gas) economizer back segment heat exchange and two
It is discharged after the heat exchange of grade low-temp economizer through desulfurizing tower and chimney, to realize while realizing that flue gas is cooling to condensed water
Then heating heats the cold Secondary Air in Secondary Air steam air heater by the condensed water after heating, enter to improve
The temperature of cold Secondary Air in burner hearth further promotes the temperature of flue gas, avoids leading to bag-type dust since flue-gas temperature is too low
The problem that device is hardened, dust removing effects are poor.It avoids the problem that cold end low-temperature corrosion occurs for air preheater simultaneously, while not needing outer
Boundary provides heat source.
Detailed description of the invention
The structural schematic diagram of Fig. 1 the utility model；
Fig. 2 is the location drawing of the utility model installation.
Wherein, 1 it is the low province's inlet adjustment valve of level-one, 2 be one-level booster pump, 3 is level-one low-level (stack-gas) economizer back segment, 4 for again
Circulating regulation valve, 5 be level-one low-level (stack-gas) economizer leading portion, 6 be the low province's bypass valve of level-one, 7 be the low province's back-water valve (BWV) of level-one, 8 be
The low province's inlet adjustment valve of second level, 9 be two-stage supercharging pump, 10 be second level low-level (stack-gas) economizer, 11 be Secondary Air steam air heater, 12 be second level
Low province's back-water valve (BWV), 13 be hot air hose bypass valve, 14 be No. 7 low-pressure heaters, 15 be No. 8 low-pressure heaters, 16 be No. 9 low
Press heater.
Specific embodiment
The utility model is further described with reference to the accompanying drawing.
As shown in Figures 1 and 2, thermal power plant's combined type Two-way Cycle fume afterheat effective utilization system described in the utility model
Including condensed water input channel, 15, No. 7 low-pressure heatings of low-pressure heater of low-pressure heater 16,8 of Secondary Air steam air heater 11,9
Device 14, one-level booster pump 2, two-stage supercharging pump 9, second level low-level (stack-gas) economizer 10, level-one low-level (stack-gas) economizer back segment 3 and a grade low-temp save
Coal device leading portion 5；The outlet of condensed water input channel and the outlet of Secondary Air steam air heater 11 and the entrance phase of No. 9 low-pressure heaters 16
Connection, the outlet of No. 9 low-pressure heaters 16 are connected with the entrance of No. 8 low-pressure heaters 15, the outlet of No. 8 low-pressure heaters 15
It is connected with the entrance of the entrance of No. 7 low-pressure heaters 14, the entrance of one-level booster pump 2 and two-stage supercharging pump 9, two-stage supercharging pump
9 outlet is connected through second level low-level (stack-gas) economizer 10 with the entrance of Secondary Air steam air heater 11, the outlet and level-one of one-level booster pump 2
The entrance of low-level (stack-gas) economizer back segment 3 is connected, and the outlet of level-one low-level (stack-gas) economizer back segment 3 is divided into three tunnels, wherein the first via and one
The entrance of grade booster pump 2 is connected, and the second tunnel is connected with the entrance of level-one low-level (stack-gas) economizer leading portion 5, and third road is low with level-one
The outlet of warm economizer leading portion 5 and the outlet of No. 7 low-pressure heaters 14 are connected；Wherein, level-one low-level (stack-gas) economizer leading portion 5 is installed
In thermal power plant between bag filter and air-introduced machine, level-one low-level (stack-gas) economizer back segment 3 and second level low-level (stack-gas) economizer 10 are located at fire
In power plant between air-introduced machine and desulfurizing tower, and level-one low-level (stack-gas) economizer back segment 3 and second level low-level (stack-gas) economizer 10 are along flow of flue gas side
To setting gradually, Secondary Air steam air heater 11 is located in thermal power plant between pressure fan and air preheater.
The utility model further includes the low province's back-water valve (BWV) 12 of second level and hot air hose bypass valve 13, wherein hot air hose bypass
One end of regulating valve 13 is connected with the outlet of second level low-level (stack-gas) economizer 10, by one end of the low province's back-water valve (BWV) 12 of second level and hot air hose
The outlet of the other end and Secondary Air steam air heater 11 of road regulating valve 13 is connected, the other end of the low province's back-water valve (BWV) 12 of second level and No. 9
The entrance of low-pressure heater 16 is connected.
The utility model further includes the low province's inlet adjustment valve 1 of level-one and the low province's inlet adjustment valve 8 of second level, wherein level-one is low
One end of one end and the low province's inlet adjustment valve 8 of second level for saving inlet adjustment valve 1 is connected with the outlet of No. 8 low-pressure heaters 15
Logical, the other end of the low province's inlet adjustment valve 8 of second level is connected with the entrance of two-stage supercharging pump 9, the low province's inlet adjustment valve 1 of level-one
The other end is connected with the entrance of one-level booster pump 2.
The utility model further includes recycling regulating valve 4, wherein one end of recycling regulating valve 4 and a grade low-temp save coal
The outlet of device back segment 3 is connected, and the other end of recycling regulating valve 4 is connected with the entrance of one-level booster pump 2.
The utility model further includes the low province's bypass valve 6 of level-one and the low province's back-water valve (BWV) 7 of level-one, wherein by the low province of level-one
One end of road regulating valve 6 is connected with the outlet of level-one low-level (stack-gas) economizer back segment 3, one end of the low province's back-water valve (BWV) 7 of level-one and level-one
The outlet of low province's bypass valve 6 and the outlet of level-one low-level (stack-gas) economizer leading portion 5 are connected, the low province's back-water valve (BWV) 7 of level-one it is another
End is connected with the outlet of No. 7 low-pressure heaters 14.
The specific work process of the utility model are as follows:
Bag filter output flue gas enter in level-one low-level (stack-gas) economizer leading portion 5, and with level-one low-level (stack-gas) economizer leading portion 5
Interior water exchanges heat, and flue-gas temperature is reduced to 105 DEG C by 140 DEG C, and the flue gas after cooling makes its temperature through air-introduced machine compressed action
Degree rises to 113 DEG C, enters back into level-one low-level (stack-gas) economizer back segment 3, and exchange heat with the water in level-one low-level (stack-gas) economizer back segment 3,
So that flue-gas temperature continues to be reduced to 95 DEG C, then into second level low-level (stack-gas) economizer 10, and with second level low-level (stack-gas) economizer 10
Interior water exchanges heat, so that flue-gas temperature is reduced to 75 DEG C or so, is most discharged after desulfurizing tower is handled from chimney afterwards.
Condensed water is entered level-one by the low province's inlet adjustment valve 1 of level-one and is pressurized by the export supply of No. 8 low-pressure heaters 15
In pump 2, the condensed water after pressurization enters in level-one low-level (stack-gas) economizer back segment 3, then with after flue gas heat exchange, the temperature of condensed water is by 70
DEG C or so be increased to 88 DEG C or so；Condensed water advances in level-one low-level (stack-gas) economizer leading portion 5, and carries out heat exchange with flue gas and rise
Temperature makes its temperature be increased to 120 DEG C or so, is back to condensate line eventually by the low province's back-water valve (BWV) 7 of level-one, No. 8 low pressure add
The condensed water that hot device 15 exports enters in second level low-level (stack-gas) economizer 10 through the low province's inlet adjustment valve 8 of second level, two-stage supercharging pump 9, and
Heat exchange heating is carried out with flue gas in second level low-level (stack-gas) economizer 10, so that the water temperature of condensed water is increased to 85 DEG C of left sides by 65 DEG C or so
The right side subsequently enters in Secondary Air steam air heater 11, and exchanges heat in Secondary Air steam air heater 11 with cold Secondary Air, so that water temperature drops
To 53 DEG C or so, cold Secondary Air temperature is increased to 70 DEG C or so.
The low province's inlet adjustment valve 1 of level-one and the low province's inlet adjustment valve 8 of second level are used to adjust the entrance of level-one low-level (stack-gas) economizer
Water temperature, recycling regulating valve 4 is also used for the adjusting of level-one low-level (stack-gas) economizer inlet water temperature in underload: by adjusting hot water
Recirculation volume makes the water temperature of level-one low-level (stack-gas) economizer entrance not less than 70 DEG C.
The low province's bypass valve 6 of level-one is for adjusting the water flow for flowing through level-one low-level (stack-gas) economizer leading portion 5, when a grade low-temp
When the smoke temperature that economizer leading portion 5 exports is higher, the low province's bypass valve 6 of level-one is turned down, when level-one low-level (stack-gas) economizer leading portion 5 exports
Smoke temperature it is relatively low when, tune up the low province's bypass valve 6 of level-one, hot air hose bypass valve 13 is for controlling Secondary Air steam air heater 11
The secondary air temperature of outlet reduces the hot water amount for flowing through Secondary Air steam air heater 11 when wind-warm syndrome is higher, i.e. increase hot air hose bypass is adjusted
Section 13 aperture of valve need to increase the hot water amount for flowing through Secondary Air steam air heater 11 when wind-warm syndrome is relatively low, turn down hot air hose bypass at this time and adjust
Save valve 13.
To sum up, flue gas passes through multiple gas-water heat exchangers, and waste heat is fully recycled, and realizes condensing water temperature
With the promotion of Secondary Air temperature, unit coal consumption is reduced, unit efficiency is improved.In addition, the utility model uses two sections of two-stage
Design, substantially increases flue gas waste heat recovery efficiency, using the modular design of low-level (stack-gas) economizer water steam air heater, the heat of recycling
For heat-setting water and cold Secondary Air, unit coal consumption is significantly reduced, promotes unit efficiency.In addition, two-stage low temperature economizer water
Side is independent Two-way Cycle, realizes that respective water recycles by the booster pump being equipped with.The investment of two-stage low temperature economizer, exit and therefore
Barrier shuts down and is independent of each other, and greatly improves the reliability of system.
Claims (5)
1. a kind of thermal power plant's combined type Two-way Cycle fume afterheat effective utilization system, which is characterized in that including condensing water inlet pipe
Road, Secondary Air steam air heater (11), No. 9 low-pressure heaters (16), No. 8 low-pressure heaters (15), No. 7 low-pressure heaters (14), one
Grade booster pump (2), two-stage supercharging pump (9), second level low-level (stack-gas) economizer (10), level-one low-level (stack-gas) economizer back segment (3) and a grade low-temp
Economizer leading portion (5)；
The outlet of condensed water input channel and the outlet of Secondary Air steam air heater (11) are connected with the entrance of No. 9 low-pressure heaters (16)
Logical, the outlet of No. 9 low-pressure heaters (16) is connected with the entrance of No. 8 low-pressure heaters (15), No. 8 low-pressure heaters (15)
It exports and is connected with the entrance of the entrance of No. 7 low-pressure heaters (14), the entrance of one-level booster pump (2) and two-stage supercharging pump (9),
The outlet of two-stage supercharging pump (9) is connected through second level low-level (stack-gas) economizer (10) with the entrance of Secondary Air steam air heater (11), and level-one increases
The outlet of press pump (2) is connected with the entrance of level-one low-level (stack-gas) economizer back segment (3), the outlet of level-one low-level (stack-gas) economizer back segment (3)
It is divided into three tunnels, wherein the first via is connected with the entrance of one-level booster pump (2), the second tunnel and level-one low-level (stack-gas) economizer leading portion (5)
Entrance be connected, third road is connected with the outlet of level-one low-level (stack-gas) economizer leading portion (5) and the outlet of No. 7 low-pressure heaters (14)
It is logical；
Wherein, level-one low-level (stack-gas) economizer leading portion (5) is installed in thermal power plant between bag filter and air-introduced machine, and a grade low-temp saves
Coal device back segment (3) and second level low-level (stack-gas) economizer (10) are located in thermal power plant between air-introduced machine and desulfurizing tower, and a grade low-temp saves coal
Device back segment (3) and second level low-level (stack-gas) economizer (10) are set gradually along flow of flue gas direction, and Secondary Air steam air heater (11) is located at thermoelectricity
In factory between pressure fan and air preheater.
2. thermal power plant's combined type Two-way Cycle fume afterheat effective utilization system according to claim 1, which is characterized in that also
Including the low province's back-water valve (BWV) (12) of second level and hot air hose bypass valve (13), wherein one end of hot air hose bypass valve (13)
It is connected with the outlet of second level low-level (stack-gas) economizer (10), one end of the low province's back-water valve (BWV) (12) of second level and hot air hose bypass valve
(13) outlet of the other end and Secondary Air steam air heater (11) is connected, and the other end of the low province's back-water valve (BWV) (12) of second level is low with No. 9
The entrance of pressure heater (16) is connected.
3. thermal power plant's combined type Two-way Cycle fume afterheat effective utilization system according to claim 1, which is characterized in that also
Including the low province's inlet adjustment valve (1) of level-one and the low province's inlet adjustment valve (8) of second level, wherein the low province's inlet adjustment valve (1) of level-one
One end and one end of the low province's inlet adjustment valve (8) of second level are connected with the outlet of No. 8 low-pressure heaters (15), and the low province of second level enters
The other end of mouth regulating valve (8) is connected with the entrance of two-stage supercharging pump (9), the other end of the low province's inlet adjustment valve (1) of level-one
It is connected with the entrance of one-level booster pump (2).
4. thermal power plant's combined type Two-way Cycle fume afterheat effective utilization system according to claim 1, which is characterized in that also
Including recycling regulating valve (4), wherein one end of recycling regulating valve (4) and the outlet phase of level-one low-level (stack-gas) economizer back segment (3)
The other end of connection, recycling regulating valve (4) is connected with the entrance of one-level booster pump (2).
5. thermal power plant's combined type Two-way Cycle fume afterheat effective utilization system according to claim 1, which is characterized in that also
Including the low province's bypass valve (6) of level-one and the low province's back-water valve (BWV) (7) of level-one, wherein one end of the low province's bypass valve (6) of level-one
It is connected with the outlet of level-one low-level (stack-gas) economizer back segment (3), the province's bypass low with level-one of one end of the low province's back-water valve (BWV) (7) of level-one is adjusted
The outlet of valve (6) and the outlet of level-one low-level (stack-gas) economizer leading portion (5) are connected, the other end of the low province's back-water valve (BWV) (7) of level-one and No. 7
The outlet of low-pressure heater (14) is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821539018.9U CN208920038U (en) | 2018-09-19 | 2018-09-19 | A kind of thermal power plant's combined type Two-way Cycle fume afterheat effective utilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821539018.9U CN208920038U (en) | 2018-09-19 | 2018-09-19 | A kind of thermal power plant's combined type Two-way Cycle fume afterheat effective utilization system |
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| CN208920038U true CN208920038U (en) | 2019-05-31 |
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ID=66706412
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| CN201821539018.9U Active CN208920038U (en) | 2018-09-19 | 2018-09-19 | A kind of thermal power plant's combined type Two-way Cycle fume afterheat effective utilization system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594774A (en) * | 2019-09-12 | 2019-12-20 | 中国电力工程顾问集团西南电力设计院有限公司 | Heating system of air heater at cold end of air preheater of thermal power plant |
| CN113310042A (en) * | 2021-05-21 | 2021-08-27 | 华能国际电力股份有限公司大连电厂 | Low-temperature coal-saving self-adjusting system for thermal power plant |
-
2018
- 2018-09-19 CN CN201821539018.9U patent/CN208920038U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594774A (en) * | 2019-09-12 | 2019-12-20 | 中国电力工程顾问集团西南电力设计院有限公司 | Heating system of air heater at cold end of air preheater of thermal power plant |
| CN113310042A (en) * | 2021-05-21 | 2021-08-27 | 华能国际电力股份有限公司大连电厂 | Low-temperature coal-saving self-adjusting system for thermal power plant |
| CN113310042B (en) * | 2021-05-21 | 2022-11-29 | 华能国际电力股份有限公司大连电厂 | Low-temperature economizer self-adjusting system for thermal power plant |
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