CN110542111A - Boiler low temperature flue gas treatment system - Google Patents
Boiler low temperature flue gas treatment system Download PDFInfo
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- CN110542111A CN110542111A CN201910783994.1A CN201910783994A CN110542111A CN 110542111 A CN110542111 A CN 110542111A CN 201910783994 A CN201910783994 A CN 201910783994A CN 110542111 A CN110542111 A CN 110542111A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1006—Arrangement or mounting of control or safety devices for water heating systems
- F24D19/1009—Arrangement or mounting of control or safety devices for water heating systems for central heating
- F24D19/1015—Arrangement or mounting of control or safety devices for water heating systems for central heating using a valve or valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/18—Hot-water central heating systems using heat pumps
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Chimneys And Flues (AREA)
Abstract
the invention relates to the field of smoke plume treatment by using waste heat of boiler exhaust smoke, and particularly discloses a low-temperature smoke treatment system for a boiler. This boiler low temperature flue gas treatment system, including the former flue of end connection chimney, its characterized in that: a flue between the outlet of the desulfurization tower and a chimney is provided with a flue gas latent heat recovery tower, and the flue gas latent heat recovery tower is connected with an original flue through a low-temperature flue gas bypass flue and a recovery tower outlet flue; a high-temperature air source taking air channel is communicated with an original flue between an outlet flue of the recovery tower and a chimney, and an outlet air channel of the air preheater is communicated with the high-temperature air source taking air channel; the outlet of the smoke latent heat recovery tower is connected in parallel and communicated with the absorption heat pump and the cooling water plate for exchange. The invention has reasonable design and flexible application, effectively controls smoke plume, partially utilizes the waste heat of smoke, improves the unit benefit and realizes the coexistence of economic benefit, environmental protection benefit and social benefit of a power plant.
Description
(I) technical field
The invention relates to the field of smoke plume treatment by using waste heat of boiler exhaust smoke, in particular to a low-temperature smoke treatment system of a boiler.
(II) background of the invention
The low-temperature flue gas desulfurized by the thermal power generating unit has low waste heat grade and high recycling difficulty, and a smoke plume treatment project carried out in response to the national environmental protection requirement cannot fully utilize the recycled waste heat resource, and the smoke plume treatment effect is only realized in a narrow environmental temperature range.
Disclosure of the invention
In order to make up for the defects of the prior art, the invention provides the boiler low-temperature flue gas treatment system which is economic and environment-friendly, has high unit benefit and high flue gas waste heat utilization rate.
The invention is realized by the following technical scheme:
The utility model provides a boiler low temperature flue gas treatment system, includes the former flue of end-to-end connection chimney, has arranged air heater and desulfurizing tower, its characterized in that in proper order along flue gas flow direction in the former flue: a flue between the outlet of the desulfurization tower and a chimney is provided with a flue gas latent heat recovery tower, and the flue gas latent heat recovery tower is connected with an original flue through a low-temperature flue gas bypass flue and a recovery tower outlet flue; a high-temperature air source taking air channel is communicated with an original flue between an outlet flue of the flue gas latent heat recovery tower and a chimney, and a high-temperature air mixing air valve is arranged on a connecting port of the high-temperature air source taking air channel and the original flue; the air preheater is arranged on an outlet air channel of a blower of the blower, the air heater is arranged on an inlet air channel of the blower, the outlet air channel of the air preheater is communicated with the high-temperature air source taking air channel, and the high-temperature air source taking air valve is arranged on the communication port; the outlet of the smoke latent heat recovery tower is provided with an absorption heat pump and a cooling water plate which are connected in parallel.
in the invention, the flue gas latent heat recovery tower reduces the temperature of the flue gas through low-temperature cooling water, so that water vapor in the flue gas is condensed and latent heat of vaporization is released, and pollutants such as dust, sulfur dioxide, oxynitride and the like in the flue gas are absorbed and cleaned again, thereby realizing smoke plume treatment and reducing the total amount of the water vapor in the flue gas; and then the flue gas temperature is increased, the relative humidity of the flue gas is reduced, and the smoke plume treatment in a wider environment temperature range is realized.
The more preferable technical scheme of the invention is as follows:
A water inlet of the flue gas latent heat recovery tower is communicated with a heater water return pipeline of the air heater, a cooling water main pipeline of the absorption heat pump, a plate exchange water outlet pipeline of the cooling water plate and a condensate water drain pipe in parallel, the condensate water drain pipe is communicated with a flue gas condensate water tank, and a condensate water drain valve is installed on the condensate water drain pipe; and storing the water vapor condensed from the flue gas in a flue gas condensed water tank, or using the water vapor for desulfurization and water supplement, or using the water vapor for industrial water.
The water outlet of the flue gas latent heat recovery tower is communicated with the water inlet of the air heater through a heater water taking pipeline and a heater water taking regulating valve, and the water outlet of the air heater is communicated with a heater water return pipeline.
The water outlet of the flue gas latent heat recovery tower is communicated with the water inlet of the absorption heat pump through a cooling water return main pipeline and a heat pump inlet valve, the water outlet of the absorption heat pump is communicated with a cooling water main pipeline, and a heat pump outlet valve is installed on the cooling water main pipeline.
The water outlet of the flue gas latent heat recovery tower is communicated with the cooling water plate through the plate-exchange water inlet pipeline and the plate-exchange water inlet valve, the water outlet communicated with the plate-exchange water outlet pipeline is communicated with the plate-exchange water outlet pipeline, and the plate-exchange water outlet pipeline is provided with the plate-exchange water outlet valve.
A cooling water booster pump and a cooling water spraying regulating valve are arranged on a water inlet of the flue gas latent heat recovery tower, and a recovery tower booster pump is arranged on a water outlet of the flue gas latent heat recovery tower; a main flue bypass valve is arranged on a low-temperature flue gas bypass flue of the flue gas latent heat recovery tower, and a recovery tower outlet air valve is arranged on a recovery tower outlet flue; and a main flue gas isolating valve is arranged on the original flue between the low-temperature flue gas bypass flue and the outlet flue of the recovery tower.
The flue gas latent heat absorption tower is communicated with an industrial water replenishing pipeline through a water replenishing regulating valve and is used for replenishing water at the initial stage of system starting.
The absorption heat pump works among three heat sources, except for the flue gas latent heat recovery tower disclosed previously, one end of the heat source is a heat source which is communicated with a steam system through a gas source steam inlet pipeline and a steam inlet regulating valve, is communicated with a condensed water system through a condensed water electric valve and a condensed water return pipeline, and takes steam from an original system as a driving heat source; the heat source at the other end is communicated with a heat supply and return water main pipeline through a heat supply and return water bypass water taking pipeline and a heat supply and return water bypass water return pipeline respectively, and a main pipeline regulating valve positioned between the heat supply and return water main pipeline is arranged on the heat supply and return water main pipeline; a bypass water taking isolating valve and a bypass water taking circulating pump are installed on the heat supply return water bypass water taking pipeline, and a bypass return water valve is installed on the heat supply return water bypass return water pipeline.
The heat exchange water inlet and the water outlet of the cooling water plate exchange are respectively communicated with a circulating cooling water system in parallel through a circulating cooling water intake pipeline and a circulating cooling water return pipeline, a circulating cooling water intake pump is installed on the circulating cooling water intake pipeline, and a circulating cooling water return valve is installed on the circulating cooling water return pipeline.
According to the invention, the flue gas latent heat recovered by the method, the first part heats the heating backwater of the heat supply network (in winter), and the consumption of the steam heating backwater is reduced; the second part heats cold air (in winter), improves the exhaust gas temperature and the flue gas temperature at a desulfurization outlet, and improves the latent heat grade of the desulfurized low-grade flue gas. The flue gas (all the year) after being heated, cooled and dehumidified is heated by high-temperature air, so that the temperature of the flue gas is increased, and the relative humidity of water vapor in the flue gas is reduced. Extracting heat of flue gas spray cooling water by using a heat pump in winter, and controlling the temperature of the spray water entering the flue gas latent heat recovery tower; latent heat recovered from the flue gas in summer is mainly discharged through circulating water.
The invention has reasonable design and flexible application, effectively treats the smoke plume, partially utilizes the waste heat of the smoke, improves the unit benefit, realizes the coexistence of the economic benefit, the environmental protection benefit and the social benefit of a power plant, and solves the problems that the smoke plume treatment process is limited by the environmental temperature and the latent heat of low-temperature smoke is recycled.
(IV) description of the drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of the present invention.
In the figure, 1 an air blower inlet air duct, 2 an air blower, 3 an air blower outlet air duct, 4 an air preheater, 5 a desulfurizing tower, 6 an original flue duct, 7 a chimney, 8 a main flue gas isolating valve, 9 a main flue bypass valve, 10 a low-temperature flue gas bypass flue duct, 11 a flue gas booster fan, 12 a flue gas latent heat recovery tower, 13 a recovery tower outlet flue duct, 14 a recovery tower outlet air valve, 15 a recovery tower booster pump, 16 a cooling water return main duct, 17 a heat pump inlet valve, 18 an absorption heat pump, 19 a heat pump outlet valve, 20 a cooling water main duct, 21 a cooling water booster pump, 22 a water spray regulating valve, 23 a heater water taking regulating valve, 24 a heater water taking duct, 25 an air heater, 26 a heater water return duct, 27 a high-temperature air source air valve, 28 a high-temperature air source air duct, 29 a high-temperature air mixing air valve, 30 a plate water changing duct, 31 a plate water changing, 33 board trades the water outlet valve, 34 board trades the outlet pipe, 35 comdenstion water drain pipe, 36 comdenstion water drain valve, 37 flue gas condensate water tank, 38 main pipeline governing valves, 39 bypass water intaking closing valves, 40 bypass water intaking circulating pump, 41 heat supply return water bypass water intaking pipeline, 42 heat supply return water bypass return water pipeline, 43 bypass return water valves, 44 air supply admission pipelines, 45 admission governing valves, 46 condensate water electric valves, 47 condensate water return pipelines, 48 recirculated cooling water intaking pipeline, 49 recirculated cooling water intaking pump, 50 recirculated cooling water return valves, 51 recirculated cooling water return pipelines, 52 moisturizing governing valves.
(V) detailed description of the preferred embodiments
the attached drawing is an embodiment of the invention. The embodiment comprises an original flue 6 with the tail end connected with a chimney 7, wherein an air preheater 4 and a desulfurizing tower 5 are sequentially arranged in the original flue 6 along the flow direction of flue gas, a flue gas latent heat recovery tower 12 is arranged on a flue between the outlet of the desulfurizing tower 5 and the chimney 7, and the flue gas latent heat recovery tower 12 is connected with the original flue 6 through a low-temperature flue gas bypass flue 10 and a recovery tower outlet flue 13; a high-temperature air source taking air duct 28 is communicated with the original flue 6 between the recovery tower outlet flue 13 and the chimney 7, and a high-temperature air mixing air valve 29 is arranged on a connecting port of the high-temperature air source taking air duct 28 and the original flue 6; the air preheater 4 is arranged on the air blower outlet air duct 3 of the air blower 2, the air heater 25 is arranged on the air blower inlet air duct 1 of the air blower 2, the outlet air duct of the air preheater 4 is communicated with the high-temperature air source taking air duct 28, and the high-temperature air source taking air valve 27 is arranged on the communication port; the outlet of the flue gas latent heat recovery tower 12 is communicated with the absorption heat pump 18 and the cooling water plate exchanger 32 in parallel.
The water inlet of the flue gas latent heat recovery tower 12 is connected in parallel with a heater water return pipeline 26 of the air heater 25, a cooling water main pipeline 20 of the absorption heat pump 18, a plate exchange water outlet pipeline 34 of the cooling water plate exchanger 32 and a condensate water drain pipe 35, the condensate water drain pipe 35 is communicated with a flue gas condensate water tank 37, and the condensate water drain pipe 35 is provided with a condensate water drain valve 36.
The flue gas latent heat recovery tower 12 mainly exchanges heat with the air heater 25, the absorption heat pump 18 and the cooling water plate exchanger 32, and the specific connection is as follows:
(1) The water outlet of the flue gas latent heat recovery tower 12 is communicated with the water inlet of an air heater 25 through a heater water taking pipeline 24 and a heater water taking regulating valve 23, and the water outlet of the air heater 25 is communicated with a heater water return pipeline 26;
(2) The water outlet of the flue gas latent heat recovery tower 12 is communicated with the water inlet of an absorption heat pump 18 through a cooling water return main pipe 16 and a heat pump inlet valve 17, the water outlet of the absorption heat pump 18 is communicated with a cooling water main pipe 20, and a heat pump outlet valve 19 is installed on the cooling water main pipe 20;
(3) The water outlet of the flue gas latent heat recovery tower 12 is communicated with a cooling water plate exchanger 32 through a plate exchange water inlet pipeline 30 and a plate exchange water inlet valve 31, the water outlet of the cooling water plate exchanger 32 is communicated with a plate exchange water outlet pipeline 34, and a plate exchange water outlet valve 33 is installed on the plate exchange water outlet pipeline 31.
A cooling water booster pump 21 and a cooling water spraying regulating valve 22 are arranged on a water inlet of the flue gas latent heat recovery tower 12, and a recovery tower booster pump 15 is arranged on a water outlet of the flue gas latent heat recovery tower; a main flue bypass valve 9 is arranged on a low-temperature flue gas bypass flue 10 of a flue gas latent heat recovery tower 12, and a recovery tower outlet air valve 14 is arranged on a recovery tower outlet flue 13; and a main flue gas isolating valve 8 is arranged on the original flue 6 between the low-temperature flue gas bypass flue 10 and the recovery tower outlet flue 13.
The heat source at one end of the absorption heat pump 18 is communicated with a steam system through a gas source steam inlet pipeline 44 and a steam inlet regulating valve 45, and is communicated with a condensed water system through a condensed water electric valve 46 and a condensed water return pipeline 47; the heat source at the other end is communicated with a heat supply and return water main pipeline through a heat supply and return water bypass water taking pipeline 41 and a heat supply and return water bypass water return pipeline 42 respectively, and a main pipeline regulating valve 38 positioned between the heat supply and return water main pipeline is arranged on the heat supply and return water main pipeline; a bypass water taking isolating valve 39 and a bypass water taking circulating pump 40 are installed on the heat supply return water bypass water taking pipeline 41, and a bypass return water valve 43 is installed on the heat supply return water bypass return pipeline 42.
The heat exchange water inlet and the heat exchange water outlet of the cooling water plate exchanger 33 are respectively communicated with a circulating cooling water system in parallel through a circulating cooling water taking pipeline 48 and a circulating cooling water return pipeline 51, a circulating cooling water taking pump 49 is installed on the circulating cooling water taking pipeline 48, and a circulating cooling water return valve 50 is installed on the circulating cooling water return pipeline 51.
The specific implementation and application of the invention are as follows:
(1) a flue gas latent heat recovery tower 12 is arranged on an original flue 6 between an outlet of a desulfurizing tower 5 and a chimney 7, the flue gas is connected with the original flue 6 through a low-temperature flue gas bypass flue 10 and a recovery tower outlet flue 13, flue gas is sprayed with low-temperature cooling water at 30 ℃, the temperature of the flue gas is reduced from 45 ℃ to below 35 ℃, the temperature of the spraying water is increased to about 42 ℃, and water vapor in the flue gas is condensed and releases latent heat of vaporization. The branch system can be put into operation all year round.
(2) A high-temperature air mixing air valve 29 is arranged on a flue between a flue 13 at the outlet of the recovery tower and a chimney 7, the temperature of the flue gas is heated to be higher than 40 ℃ from 35 ℃ by using high-temperature air at the outlet of the air preheater 4, the relative humidity of water vapor in the flue gas is reduced, and the smoke plume treatment can be realized in a wider environmental temperature range. The branch system can be put into operation all year round.
(3) An air heater 25 is arranged on an air duct 1 at the inlet of the air feeder, and the air temperature is increased from 1 ℃ to 25 ℃ (in winter) by utilizing the recovered flue gas waste heat, so that the boiler efficiency and the exhaust gas temperature are improved. This branching system can be put into operation only in winter.
(4) An absorption heat pump 18 and a cooling water plate exchanger 33 are arranged at an outlet of the smoke latent heat recovery tower 12, the smoke latent heat recovery tower is communicated with the absorption heat pump 18 through a cooling water return main pipeline 16 and a heat pump inlet valve 17 in winter, cooling water return is reduced from 42 ℃ to 30 ℃ through the absorption heat pump 18, extracted heat is used for heating supply water return, and the temperature of the supply water is increased from 42 ℃ to over 52 ℃; in summer, the plate-changing water inlet pipeline 30 and the plate-changing water inlet valve 31 are communicated with the cooling water plate exchanger 32, and the return water of the cooling water is reduced from 42 ℃ to 30 ℃ by using circulating water. And a recovery tower booster pump 15 is arranged at the outlet of the flue gas latent heat recovery tower 12 and is used for overcoming the resistance loss of the system (the absorption heat pump 18, the cooling water plate exchanger 32 and the air heater 25). And a cooling water booster pump 21 and a cooling water spraying regulating valve 22 are arranged on an outlet pipeline of the system and are used for regulating the flow rate of spraying water and controlling the temperature of the flue gas. Meanwhile, a condensed water drain pipe 35, a condensed water drain valve 36 and a flue gas condensed water tank 37 are arranged in front of an inlet pipeline of the cooling water booster pump 21 and used for storing water vapor condensed from flue gas into the flue gas condensed water tank 37, or used for desulfurization and water supplement, or used for industrial water.
(5) the steam is taken from the original system as the driving heat source of the absorption heat pump 18, an air source steam inlet pipeline 44 and a steam inlet adjusting valve 45 are arranged, and a condensed water return pipeline 47 and a condensed water electric valve 46 are arranged.
(6) Circulating water is taken from an original system to serve as a cold source of cooling return water in summer, a circulating cooling water taking pipeline 48 and a circulating cooling water taking pump 49 are arranged, and a circulating cooling water return pipeline 51 and a circulating cooling water return valve 50 are arranged.
(7) And a water replenishing regulating valve 52 is arranged on the flue gas latent heat recovery tower 12 and is used for replenishing water at the initial stage of system starting.
Claims (9)
1. The utility model provides a boiler low temperature flue gas treatment system, includes former flue (6) of end-to-end connection chimney (7), has arranged air heater (4) and desulfurizing tower (5), its characterized in that in proper order along flue gas flow direction in former flue (6): a flue gas latent heat recovery tower (12) is arranged on an original flue (6) between an outlet of the desulfurizing tower (5) and a chimney (7), and the flue gas latent heat recovery tower (12) is connected with the original flue (6) through a low-temperature flue gas bypass flue (10) and a recovery tower outlet flue (13); a high-temperature air source taking air duct (28) is communicated with the original flue (6) between the recovery tower outlet flue (13) and the chimney (7), and a high-temperature air mixing air valve (29) is arranged on a connecting port of the high-temperature air source taking air duct (28) and the original flue (6); the air preheater (4) is arranged on an air feeder outlet air channel (3) of the air feeder (2), an air heater (25) is arranged on an air feeder inlet air channel (1) of the air feeder (2), the outlet air channel of the air preheater (4) is communicated with a high-temperature air source taking air channel (28), and a high-temperature air source taking air valve (27) is arranged on a communication port; the outlet of the smoke latent heat recovery tower (12) is communicated with an absorption heat pump (18) and a cooling water plate exchanger (32) in parallel.
2. the boiler low temperature flue gas treatment system of claim 1, wherein: the water inlet of the flue gas latent heat recovery tower (12) is connected with a heater water return pipeline (26) of the air heater (25), a cooling water main pipeline (20) of the absorption heat pump (18), and a plate of the cooling water plate replacing (32) is replaced with a water outlet pipeline (34) and a condensed water drain pipe (35), the condensed water drain pipe (35) is communicated with a flue gas condensed water tank (37), and the condensed water drain pipe (35) is provided with a condensed water drain valve (36).
3. The boiler low temperature flue gas treatment system according to claim 1 or 2, wherein: the water outlet of the flue gas latent heat recovery tower (12) is communicated with the water inlet of the air heater (25) through a heater water taking pipeline (24) and a heater water taking regulating valve (23), and the water outlet of the air heater (25) is communicated with a heater water return pipeline (26).
4. The boiler low temperature flue gas treatment system according to claim 1 or 2, wherein: the water outlet of the flue gas latent heat recovery tower (12) is communicated with the water inlet of the absorption heat pump (18) through a cooling water return main pipeline (16) and a heat pump inlet valve (17), the water outlet of the absorption heat pump (18) is communicated with a cooling water main pipeline (20), and a heat pump outlet valve (19) is installed on the cooling water main pipeline (20).
5. The boiler low temperature flue gas treatment system according to claim 1 or 2, wherein: the water outlet of the flue gas latent heat recovery tower (12) is communicated with a cooling water plate exchanger (32) through a plate water exchange inlet pipeline (30) and a plate water exchange inlet valve (31), the water outlet of the cooling water plate exchanger (32) is communicated with a plate water exchange outlet pipeline (34), and a plate water exchange outlet valve (33) is installed on the plate water exchange outlet pipeline (34).
6. The boiler low temperature flue gas treatment system of claim 1, wherein: a cooling water booster pump (21) and a cooling water spraying regulating valve (22) are arranged on a water inlet of the flue gas latent heat recovery tower (12), and a recovery tower booster pump (15) is arranged on a water outlet of the flue gas latent heat recovery tower; a main flue bypass valve (9) is arranged on a low-temperature flue gas bypass flue (10) of the flue gas latent heat recovery tower (12), and a recovery tower outlet air valve (14) is arranged on a recovery tower outlet flue (13); a main flue gas isolating valve (8) is arranged on the original flue (6) between the low-temperature flue gas bypass flue (10) and the recovery tower outlet flue (13).
7. The boiler low temperature flue gas treatment system of claim 1, wherein: the flue gas latent heat absorption tower (12) is communicated with an industrial water replenishing pipeline through a water replenishing regulating valve (52).
8. The boiler low temperature flue gas treatment system of claim 1, wherein: a heat source at one end of the absorption heat pump (18) is communicated with a steam system through a gas source steam inlet pipeline (44) and a steam inlet regulating valve (45), and is communicated with a condensed water system through a condensed water electric valve (46) and a condensed water return pipeline (47); the heat source at the other end is communicated with a heat supply and return water main pipeline through a heat supply and return water bypass water taking pipeline (41) and a heat supply and return water bypass water return pipeline (42), and a main pipeline regulating valve (38) positioned between the heat supply and return water main pipeline is arranged on the heat supply and return water main pipeline; a bypass water taking isolating valve (39) and a bypass water taking circulating pump (40) are installed on the heat supply return water bypass water taking pipeline (41), and a bypass return water valve (43) is installed on the heat supply return water bypass return water pipeline (42).
9. The boiler low temperature flue gas treatment system of claim 1, wherein: the heat exchange water inlet and the water outlet of the cooling water plate exchanger (32) are respectively communicated with a circulating cooling water system in parallel through a circulating cooling water intake pipeline (48) and a circulating cooling water return pipeline (51), a circulating cooling water intake pump (49) is installed on the circulating cooling water intake pipeline (48), and a circulating cooling water return valve (50) is installed on the circulating cooling water return pipeline (51).
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| CN201910783994.1A CN110542111A (en) | 2019-08-23 | 2019-08-23 | Boiler low temperature flue gas treatment system |
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| CN201910783994.1A CN110542111A (en) | 2019-08-23 | 2019-08-23 | Boiler low temperature flue gas treatment system |
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