CN214635248U - Waste heat utilization system of clean flue gas of desulfurization - Google Patents
Waste heat utilization system of clean flue gas of desulfurization Download PDFInfo
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- CN214635248U CN214635248U CN202120884676.7U CN202120884676U CN214635248U CN 214635248 U CN214635248 U CN 214635248U CN 202120884676 U CN202120884676 U CN 202120884676U CN 214635248 U CN214635248 U CN 214635248U
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Abstract
A waste heat utilization system of desulfurization clean flue gas belongs to the field of waste heat utilization devices. The utility model solves the problem that the existing limestone-gypsum wet desulphurization process generates the large-scale desulphurization clean flue gas waste heat utilization system equipment with waste heat. The main slurry circulating pipe is connected with the absorption tower, the main slurry circulating pipe is communicated with a slurry input pipe and a slurry output pipe, the flash evaporation absorption tank is connected with the steam generator, the dilute solution pump is installed between the output end of the flash evaporation absorption tank and the input end of the steam generator, the steam generator is connected with the heat exchanger, the concentrated solution pump is installed between the output end of the steam generator and the input end of the heat exchanger, the heat exchanger is connected with the flash evaporation absorption tank, the heat supply network water return pipe is connected with the heat exchanger, the heat exchanger is connected with the steam condenser, and the steam condenser is connected with the heat supply network output pipe.
Description
Technical Field
The utility model relates to a waste heat utilization system of clean flue gas of desulfurization belongs to the waste heat utilization equipment field.
Background
The desulfurization process of coal-fired power plants in China generally adopts a limestone-gypsum wet desulfurization process, the clean desulfurization flue gas at 50-60 ℃ generated by the process is discharged into the atmosphere along with saturated vapor, and in order to recover the heat in the clean desulfurization flue gas and the saturated vapor and reduce the energy consumption of unit GDP, professionals try the following various schemes:
1. water spraying, condensation and heat taking: through add the water spray cooling tower (or utilize desulfurizing tower defroster headspace to do tower dual cycle) after the desulfurization, reduce the gas temperature through the water spray cooling mode, promote the temperature of spraying. The spray water enters the spray circulation again after being cooled by the cooling device. The device has the advantages that the waste heat of the flue gas can be recycled deeply, and the defects of limited space, waste water generation and increased flue gas resistance are overcome;
2. condensing flue gas of a flue surface type heat exchanger to obtain heat: a flue gas heat exchanger is arranged in the flue after desulfurization, the temperature of flue gas is reduced through flue gas heat exchange, and the purpose of reducing the moisture content of the flue gas after desulfurization and extracting the waste heat of the flue gas is achieved. The heat exchanger has large heat exchange area and is easy to corrode, scale, block, wear and the like;
3. slurry surface type condensation heat extraction: a slurry cooler is arranged on the main slurry circulating pipeline, and the temperature of flue gas at a desulfurization outlet is reduced by cooling desulfurization slurry, so that the purpose of waste heat utilization is realized. The technology has small change on the absorption tower, but generates waste water which is easy to abrade, corrode, scale and block;
4. spraying a strong water absorption solution: the method adopts tower double circulation or auxiliary tower construction mode, and uses strong water absorption solution and flue gas to carry out reverse spraying, so that 40% -70% of water vapor in the flue gas is absorbed by the solution, latent heat contained in the flue gas and solution heat in the absorption process are released, and the method is used for heating process desalted water or heat supply network backwater. Meanwhile, in the process of circularly contacting the flue gas with the solution, dust particles, sulfur dioxide and formed aerosol in the flue gas are adsorbed by the solution, so that the comprehensive effects of purifying and dehumidifying the flue gas are achieved. Its advantages are no generation of waste water, limited space and high resistance to fume.
The methods for recovering the waste heat can realize the waste heat utilization of the desulfurized flue gas, but the methods have the problems of large investment and wide occupied area and are difficult to realize the use in large-scale markets. Therefore, a clean flue gas waste heat utilization system with small floor area, less investment, simple structure and convenient maintenance is needed to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model provides a problem that the clean flue gas waste heat utilization system of desulfurization that has the waste heat is upsized, and then disclose "a waste heat utilization system of clean flue gas of desulfurization". A brief summary of the present invention is provided below in order to provide a basic understanding of some aspects of the present invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention.
The technical scheme of the utility model:
a waste heat utilization system of desulfurization clean flue gas comprises an absorption tower, an absorption spraying system, a slurry circulating pump, a stop valve, a flash evaporation absorption tank, a desizing pump, a main slurry circulating pipe, a dilute solution pump, a steam generator, a steam condenser, a concentrated solution pump and a heat exchanger, wherein the absorption tower spraying system is installed in the absorption tower, the lower end of the main slurry circulating pipe is communicated with the lower part of the absorption tower, the upper end of the main slurry circulating pipe is communicated with the absorption tower spraying system, the main slurry circulating pipe is sequentially provided with the slurry circulating pump and the stop valve along the medium flowing direction, the main slurry circulating pipe is communicated with a slurry input pipe and a slurry output pipe, the stop valve is arranged at the midpoint of the slurry input pipe and the slurry output pipe, the other end of the slurry input pipe is connected with the output end of the flash evaporation absorption tank, the other end of the slurry output pipe is connected with the input end of the flash evaporation absorption tank, and the desizing pump is installed on the slurry input pipe, the output of flash evaporation absorption tank passes through the tube coupling with steam generator's input, the dilute solution pump is installed on the pipeline between flash evaporation absorption tank output and the steam generator input, steam generator's output passes through the tube coupling with the input of heat exchanger, the concentrated solution pump is installed on the pipeline between steam generator output and the heat exchanger input, the output of heat exchanger passes through the tube coupling with the input of flash evaporation absorption tank, the heat supply network wet return is connected with the input of heat exchanger, the output of heat exchanger passes through the tube coupling with steam condenser's input, steam condenser's output is connected with the heat supply network output tube.
Furthermore, a flue gas inlet and a flue gas outlet are processed on the absorption tower, the flue gas inlet is formed in the side wall of the absorption tower, the flue gas outlet is formed in the top of the absorption tower, an absorption tower spraying system is installed in the absorption tower, and the absorption tower spraying system is connected with the input end of the main slurry circulating pipe.
Further, install first electric butterfly valve on the thick liquid input tube, install second electric butterfly valve on the thick liquid output tube, first electric butterfly valve and second electric butterfly valve arrange the both ends at the trip valve respectively.
Furthermore, the input end of the steam generator is connected with a heat source pipe, the output end of the steam generator is connected with a flash evaporation exhaust steam drain pump, and a water spraying desuperheater is arranged on the heat source pipe.
Furthermore, the output end of the steam condenser is connected with a drain pump, and a heat supply network circulating pump is installed on a heat supply network water return pipe.
Further, a slurry reverse tower interface is processed at the bottom of the flash evaporation absorption tank, a slurry input pipe is communicated with the flash evaporation absorption tank through the slurry reverse tower interface, a dilute solution outlet and a vacuum pump interface are processed on the side wall of the flash evaporation absorption tank, the vacuum pump is connected with the flash evaporation absorption tank through the vacuum pump interface, the dilute solution outlet is connected with the input end of the steam generator through a pipeline, a concentrated solution spraying inlet is processed at the top of the flash evaporation absorption tank and connected with the output end of the heat exchanger, a concentrated solution spraying header is installed inside the flash evaporation absorption tank and connected with the concentrated solution spraying inlet, a plurality of concentrated solution nozzles are installed on the concentrated solution spraying header, a slurry spraying inlet is processed on the side wall of the flash evaporation absorption tank, a slurry output pipe is communicated with the flash evaporation absorption tank through the slurry spraying inlet, and the slurry spraying inlet is connected with the slurry spraying header, the slurry spraying header is arranged in the flash evaporation absorption tank cavity, and a plurality of slurry nozzles are arranged on the slurry spraying header.
Further, install tuber pipe, air distribution plate and defroster in the flash evaporation absorption tank, the defroster is arranged at flash evaporation absorption tank intermediate position, and the air distribution plate is installed to the defroster upper end, installs a plurality of tuber pipes on the air distribution plate.
Further, install air distribution plate, defroster and hood in the flash evaporation absorption tank, the defroster is arranged at flash evaporation absorption tank intermediate position, and air distribution plate is installed to the defroster upper end, installs a plurality of hoods on the air distribution plate.
Furthermore, an air pipe, a demister and baffle plates are installed in the flash evaporation absorption tank, the demister is arranged at the middle position in the flash evaporation absorption tank, the two baffle plates are fixed on the inner wall of the flash evaporation absorption tank in a staggered mode, and the air pipe is fixedly installed on the baffle plates.
The utility model has the advantages that:
1. compared with the existing products, the waste heat utilization system of the desulfurization clean flue gas has the advantages of simple and reliable equipment, low investment and operation cost, and effectively solves the problem of larger occupied area of the desulfurization flue gas waste heat recovery system, and mass transfer and heat transfer in the waste heat utilization system of the utility model can be realized in the same equipment;
2. the waste heat utilization system of the desulfurization clean flue gas has simple structure, can be independently maintained when individual equipment is damaged or needs to be maintained, and does not influence the working efficiency;
3. the utility model discloses a cooperation that has arranged defroster, air distribution plate and tuber pipe in the flash evaporation absorption tank among the clean flue gas waste heat utilization system of desulfurization is used, has stabilized the air current in the flash evaporation absorption tank, and the vapor after making the thick liquid evaporation can stably rise.
4. The utility model discloses an in the flash evaporation absorption tank of clean flue gas waste heat utilization system of desulfurization, the cooperation installation that provides multiple scheme through tuber pipe, air distribution plate, defroster, hood and baffling board is used for stabilizing the air current in the flash evaporation absorption tank and stable, and discharge the lithium bromide dilute solution from the flash evaporation absorption tank.
Drawings
FIG. 1 is a schematic diagram of the overall connection relationship of a waste heat utilization system for desulfurizing clean flue gas;
FIG. 2 is a schematic view of the internal structure of a flash absorption tank;
FIG. 3 is a schematic view of the internal structure of a flash absorption tank equipped with a hood;
fig. 4 is a schematic view of the internal structure of a flash absorption tank equipped with baffles.
In the figure, 1-an absorption tower, 2-an absorption tower spraying system, 3-a slurry circulating pump, 4-a first electric butterfly valve, 5-a cut-off valve, 6-a second electric butterfly valve, 7-a flash evaporation absorption tank, 8-a vacuum pump, 9-a desizing pump, 10-a main slurry circulating pipe, 11-a dilute solution pump, 12-a water spray desuperheater, 13-a steam generator, 14-a steam condenser, 15-a hydrophobic pump, 16-a concentrated solution pump, 17-a flash evaporation exhaust steam hydrophobic pump, 18-a heat exchanger, 19-a heat network circulating pump, 20-a flue gas inlet, 21-a flue gas outlet, 22-a slurry reverse tower interface, 23-a dilute solution outlet, 24-a concentrated solution spraying inlet, 25-a concentrated solution spraying header and 26-a concentrated solution nozzle, 27-vacuum pump interface, 28-air pipe, 29-air distribution plate, 30-demister, 31-slurry spray inlet, 32-slurry spray header, 33-slurry nozzle, 34-air cap, 35-baffle plate, 36-heat source pipe, 37-slurry input pipe, 38-slurry output pipe, 39-heat network return pipe and 40-heat network output pipe.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described below with reference to specific embodiments shown in the accompanying drawings. It should be understood that the description is intended to be exemplary, and not to limit the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
The first embodiment is as follows: the present embodiment is described with reference to fig. 1, and the system for utilizing waste heat of desulfurized clean flue gas of the present embodiment comprises an absorption tower 1, an absorption spray system 2, a slurry circulating pump 3, a shut-off valve 5, a flash evaporation absorption tank 7, a desizing pump 9, a main slurry circulating pipe 10, a dilute solution pump 11, a steam generator 13, a steam condenser 14, a concentrated solution pump 16 and a heat exchanger 18, wherein the absorption tower 1 is internally provided with the absorption spray system 2, the lower end of the main slurry circulating pipe 10 is communicated with the lower part of the absorption tower 1, the upper end of the main slurry circulating pipe 10 is communicated with the absorption tower spray system 2, the main slurry circulating pipe 10 is sequentially provided with the slurry circulating pump 3 and the shut-off valve 5 along the medium flowing direction, the main slurry circulating pipe 10 is communicated with a slurry input pipe 37 and a slurry output pipe 38, the shut-off valve 5 is arranged at the midpoint of the slurry input pipe 37 and the slurry output pipe 38, the other end of the slurry input pipe 37 is connected with the output end of the flash evaporation absorption tank 7, the other end of the slurry output pipe 38 is connected with the input end of the flash evaporation absorption tank 7, the slurry input pipe 37 is provided with a desizing pump 9, the output end of the flash evaporation absorption tank 7 is connected with the input end of the steam generator 13 through a pipeline, the dilute solution pump 11 is arranged on the pipeline between the output end of the flash evaporation absorption tank 7 and the input end of the steam generator 13, the output end of the steam generator 13 is connected with the input end of the heat exchanger 18 through a pipeline, the concentrated solution pump 16 is arranged on the pipeline between the output end of the steam generator 13 and the input end of the heat exchanger 18, the output end of the heat exchanger 18 is connected with the input end of the flash evaporation absorption tank 7 through a pipeline, the heat supply network water return pipe 39 is connected with the input end of the heat exchanger 18, the heat supply network circulating pump 19 is arranged on the heat supply network water return pipe 39, the output end of the heat exchanger 18 is connected with the input end of the steam condenser 14 through a pipeline, and the output end of the steam condenser 14 is connected with the heat supply network output pipe 40, when heat is taken, the stop valve 5 is closed, the slurry circulating pump 3 and the desizing pump 9 are started in a linkage manner, gypsum slurry exchanges heat with desulfurization flue gas in the absorption tower 1 and then is input into the flash evaporation absorption tank 7 through the main slurry circulating pipe 10 and the slurry output pipe 38 to exchange heat, moisture in the slurry absorbs heat at low pressure in the flash evaporation absorption tank 7 and is evaporated in a saturated manner, the gypsum slurry flows back into the absorption tower 1 through the slurry input pipe 37 and the main slurry circulating pipe 10 and exchanges heat with the flue gas in the absorption tower 1 again, the gypsum slurry after exchanging heat in the flash evaporation absorption tank 7 flows back into the absorption tower spraying system 2 through the main slurry circulating pipe 10 to be sprayed, the absorption tower spraying system 2 is installed at the position close to the top end of the absorption tower 1, the sprayed gypsum slurry exchanges heat with the desulfurization flue gas in the absorption tower conveniently, the stop valve 5 is used for opening the stop valve 5 and closing the first electric butterfly valve 4 and the second electric butterfly valve 6 when the system fails, the flash absorption tank 7 is isolated, and the maintenance and repair of the equipment are facilitated. The lithium bromide concentrated solution is input into the flash evaporation absorption tank 7 through an input port of the flash evaporation absorption tank 7, in the flash evaporation absorption tank 7, the water vapor evaporated by the lithium bromide concentrated solution absorption slurry is changed into a lithium bromide dilute solution, then the lithium bromide dilute solution is conveyed into a steam generator 13 by a dilute solution pump 11, the dilute solution of lithium bromide heats at high temperature in steam generator 13, the dilute solution is heated the evaporation of water and becomes the concentrated solution of lithium bromide, input to heat exchanger 18 in concentrated solution pump 16, the water of heat supply network water changing pipe is input to another input of heat exchanger 18, water and the concentrated solution of lithium bromide carry out the heat transfer in heat exchanger 18, the concentrated solution of lithium bromide after the heat transfer sprays in flowing into flash evaporation absorption tank 7 once more, the saturated vapor of the ordinary pressure that evaporates in steam generator 13 gets into steam condenser 14 in, release the heat to in the heat supply network output tube 40, thereby realize waste heat utilization's function.
The second embodiment is as follows: the embodiment is described with reference to fig. 1, and the system for utilizing waste heat of desulfurized clean flue gas of the embodiment is characterized in that a flue gas inlet 20 and a flue gas outlet 21 are processed on the absorption tower 1, the flue gas inlet 20 is arranged on the side wall of the absorption tower 1, the flue gas outlet 21 is arranged at the top of the absorption tower 1, desulfurized flue gas before heat exchange enters the absorption tower 1 from the flue gas inlet 20, and desulfurized flue gas after heat exchange is discharged from the flue gas outlet 21 of the absorption tower 1.
The third concrete implementation mode: the embodiment is described with reference to fig. 1, and the waste heat utilization system for the desulfurized clean flue gas of the embodiment is characterized in that a first electric butterfly valve 4 is installed on the slurry input pipe 37, a second electric butterfly valve 6 is installed on the slurry output pipe 38, the first electric butterfly valve 4 and the second electric butterfly valve 6 are respectively arranged at two ends of the stop valve 5, the first electric butterfly valve 4 controls the gypsum slurry to flow into the flash absorption tank 7 from the absorption tower 1 to be rapidly opened and closed, and the second electric butterfly valve 6 controls the gypsum slurry to flow back to the absorption tower 1 from the flash absorption tank 7 to be rapidly opened and closed.
The fourth concrete implementation mode: the embodiment is described with reference to fig. 1, in which the input end of the steam generator 13 is connected with a heat source pipe 36, the output end of the steam generator 13 is connected with a flash evaporation exhaust steam drain pump 17, a water spray desuperheater 12 is arranged on the heat source pipe 36, steam, gas flame or high-temperature flue gas is input into the steam generator 13 through the heat source pipe 36 to evaporate the moisture of the lithium bromide dilute solution, the evaporated moisture is discharged from the steam generator 13 through the flash evaporation exhaust steam drain pump 17, and the water spray desuperheater 10 is used for preventing the heat of the heat source input into the steam generator 13 from being too high, so as to perform a cooling process in time.
The fifth concrete implementation mode: in the present embodiment, the waste heat utilization system for the desulfurized clean flue gas according to the present embodiment is described with reference to fig. 1, wherein the output end of the steam condenser 14 is connected to the steam drain pump 15, the heat supply network water return pipe 39 is provided with the heat supply network circulating pump 19, the high-temperature steam after heat exchange in the steam condenser 14 forms condensed water after heat exchange in the steam condenser 14, the condensed water is discharged from the steam condenser 14 by the drain pump 15, and the heat supply network circulating pump 19 controls the water flow rate flowing into the heat exchanger 18.
The sixth specific implementation mode: the embodiment is described with reference to fig. 1 to 4, and the system for utilizing waste heat of desulfurized clean flue gas of the embodiment includes a slurry reverse tower interface 22 formed at the bottom of the flash evaporation absorption tank 7, a slurry input pipe 37 communicated with the flash evaporation absorption tank 7 through the slurry reverse tower interface 22, a dilute solution outlet 23 and a vacuum pump interface 27 formed on the side wall of the flash evaporation absorption tank 7, a vacuum pump 8 connected with the flash evaporation absorption tank 7 through the vacuum pump interface 27, the dilute solution outlet 23 connected with the input end of the steam generator 13 through a pipeline, a concentrated solution spray inlet 24 formed at the top of the flash evaporation absorption tank 7, the concentrated solution spray inlet 24 connected with the output end of the heat exchanger 18, a concentrated solution spray header 25 installed inside the flash evaporation absorption tank 7, the concentrated solution spray header 25 connected with the concentrated solution spray inlet 24, and a plurality of concentrated solution spray nozzles 26 installed on the concentrated solution spray header 25, a slurry spraying inlet 31 is processed on the side wall of the flash evaporation absorption tank 7, a slurry output pipe 38 is communicated with the flash evaporation absorption tank 7 through the slurry spraying inlet 31, the slurry spraying inlet 31 is connected with a slurry spraying header pipe 32, the slurry spraying header pipe 32 is installed in the cavity of the flash evaporation absorption tank 7, a plurality of slurry nozzles 33 are installed on the slurry spraying header pipe 32, a lithium bromide concentrated solution enters from a concentrated solution spraying inlet 24 and is sprayed into the flash evaporation absorption tank 7 through a concentrated solution lean nozzle 26, gypsum slurry enters from the slurry spraying inlet 31 and is sprayed into the flash evaporation absorption tank 7 through the slurry nozzles 33, a vacuum pump 8 maintains vacuum in the flash evaporation absorption tank 7 through a vacuum pump interface 27, moisture in the gypsum slurry is evaporated in a low-pressure heat absorption saturation mode, water vapor evaporated from the gypsum slurry rises in the flash evaporation absorption tank 7, the lithium bromide concentrated solution is combined with the rising water vapor to form a lithium bromide dilute solution and is discharged from a dilute solution outlet 23, the gypsum slurry after heat exchange is discharged from slurry reverse tower interface 22.
The seventh embodiment: the embodiment is described with reference to fig. 1 to 4, and the system for utilizing waste heat of desulfurized clean flue gas of the embodiment includes an air pipe 28, an air distribution plate 29 and a demister 30 installed in the flash evaporation absorption tank 7, the demister 30 is arranged at an intermediate position in the flash evaporation absorption tank 7, the air distribution plate 29 is installed at the upper end of the demister 30, the air distribution plate 29 is provided with a plurality of air pipes 28, the demister 30 is used for filtering impurities in water vapor after gypsum slurry evaporation, the air distribution plate 29 and the air pipe 28 keep the air direction in the flash evaporation absorption tank 7 stable, and it is ensured that the evaporated water vapor can rise and be combined with a lithium bromide concentrated solution.
The specific implementation mode is eight: the embodiment is described with reference to fig. 1 to 4, and the waste heat utilization system of the desulfurization clean flue gas of the embodiment is characterized in that an air distribution plate 29, a demister 30 and an air cap 34 are installed in the flash evaporation absorption tank 7, the demister 30 is arranged at the middle position in the flash evaporation absorption tank 7, the air distribution plate 29 is installed at the upper end of the demister 30, a plurality of air caps 34 are installed on the air distribution plate 29, the air caps 34 and the air pipe 28 have the same function, and a worker can perform various options according to his own needs.
The specific implementation method nine: the embodiment is described with reference to fig. 1 to 4, and the system for utilizing the residual heat of the desulfurized clean flue gas of the embodiment includes an air pipe 28, a demister 30 and a baffle plate 35 installed in the flash evaporation absorption tank 7, the demister 30 is arranged at the middle position in the flash evaporation absorption tank 7, the two baffle plates 35 are fixed on the inner wall of the flash evaporation absorption tank 7 in a staggered manner, the air pipe 28 is fixedly installed on the baffle plate 35, and the baffle plate 35 is used for bearing the lithium bromide dilute solution and conveying the lithium bromide dilute solution to the dilute solution outlet 23.
This embodiment is only illustrative of the patent and does not limit the scope of protection thereof, and those skilled in the art can make modifications to its part without departing from the spirit of the patent.
Claims (9)
1. The utility model provides a waste heat utilization system of clean flue gas of desulfurization which characterized in that: comprises an absorption tower (1), an absorption tower spraying system (2), a slurry circulating pump (3), a stop valve (5), a flash evaporation absorption tank (7), a desizing pump (9), a main slurry circulating pipe (10), a dilute solution pump (11), a steam generator (13), a steam condenser (14), a concentrated solution pump (16) and a heat exchanger (18), wherein the absorption tower spraying system (2) is arranged in the absorption tower (1), the lower end of the main slurry circulating pipe (10) is communicated with the lower part of the absorption tower (1), the upper end of the main slurry circulating pipe (10) is communicated with the absorption tower spraying system (2), the main slurry circulating pipe (10) is sequentially provided with the slurry circulating pump (3) and the stop valve (5) along the medium flowing direction, the main slurry circulating pipe (10) is communicated with a slurry input pipe (37) and a slurry output pipe (38), and the stop valve (5) is arranged at the midpoint of the slurry input pipe (37) and the slurry output pipe (38), the other end of the slurry input pipe (37) is connected with the output end of the flash evaporation absorption tank (7), the other end of the slurry output pipe (38) is connected with the input end of the flash evaporation absorption tank (7), the slurry desizing pump (9) is installed on the slurry input pipe (37), the output end of the flash evaporation absorption tank (7) is connected with the input end of the steam generator (13) through a pipeline, the dilute solution pump (11) is installed on a pipeline between the output end of the flash evaporation absorption tank (7) and the input end of the steam generator (13), the output end of the steam generator (13) is connected with the input end of the heat exchanger (18) through a pipeline, the concentrated solution pump (16) is installed on a pipeline between the output end of the steam generator (13) and the input end of the heat exchanger (18), the output end of the heat exchanger (18) is connected with the input end of the flash evaporation absorption tank (7) through a pipeline, and the heat network water return pipe (39) is connected with the input end of the heat exchanger (18), the output end of the heat exchanger (18) is connected with the input end of the steam condenser (14) through a pipeline, and the output end of the steam condenser (14) is connected with a heat supply network output pipe (40).
2. The waste heat utilization system for the desulfurized clean flue gas according to claim 1, characterized in that: a flue gas inlet (20) and a flue gas outlet (21) are processed on the absorption tower (1), the flue gas inlet (20) is arranged on the side wall of the absorption tower (1), and the flue gas outlet (21) is arranged at the top of the absorption tower (1).
3. The waste heat utilization system for the desulfurized clean flue gas according to claim 2, characterized in that: install first electric butterfly valve (4) on thick liquid input tube (37), install second electric butterfly valve (6) on thick liquid output tube (38), first electric butterfly valve (4) and second electric butterfly valve (6) are arranged respectively at the both ends of trip valve (5).
4. The waste heat utilization system for the desulfurized clean flue gas according to claim 1, characterized in that: the input end of the steam generator (13) is connected with a heat source pipe (36), the output end of the steam generator (13) is connected with a flash evaporation exhaust steam drain pump (17), and a water spraying desuperheater (12) is arranged on the heat source pipe (36).
5. The waste heat utilization system for the desulfurized clean flue gas according to claim 4, characterized in that: the output end of the steam condenser (14) is connected with a drain pump (15), and a heat supply network circulating pump (19) is installed on a heat supply network water return pipe (39).
6. The waste heat utilization system for the desulfurized clean flue gas according to claim 1, characterized in that: the bottom of the flash evaporation absorption tank (7) is processed with a slurry reverse tower interface (22), a slurry input pipe (37) is communicated with the flash evaporation absorption tank (7) through the slurry reverse tower interface (22), the side wall of the flash evaporation absorption tank (7) is processed with a dilute solution outlet (23) and a vacuum pump interface (27), a vacuum pump (8) is connected with the flash evaporation absorption tank (7) through the vacuum pump interface (27), the dilute solution outlet (23) is connected with the input end of a steam generator (13) through a pipeline, the top of the flash evaporation absorption tank (7) is processed with a concentrated solution spraying inlet (24), the concentrated solution spraying inlet (24) is connected with the output end of a heat exchanger (18), a concentrated solution spraying header pipe (25) is installed inside the flash evaporation absorption tank (7), the concentrated solution spraying header pipe (25) is connected with the concentrated solution spraying inlet (24), and a plurality of concentrated solution nozzles (26) are installed on the concentrated solution spraying header pipe (25), the side wall of the flash evaporation absorption tank (7) is provided with a slurry spraying inlet (31), a slurry output pipe (38) is communicated with the flash evaporation absorption tank (7) through the slurry spraying inlet (31), the slurry spraying inlet (31) is connected with a slurry spraying header pipe (32), the slurry spraying header pipe (32) is installed in the cavity of the flash evaporation absorption tank (7), and the slurry spraying header pipe (32) is provided with a plurality of slurry nozzles (33).
7. The waste heat utilization system for the desulfurized clean flue gas according to claim 6, characterized in that: install tuber pipe (28), air distribution plate (29) and defroster (30) in flash evaporation absorption tank (7), intermediate position in flash evaporation absorption tank (7) is arranged in defroster (30), and air distribution plate (29) are installed to defroster (30) upper end, install a plurality of tuber pipes (28) on air distribution plate (29).
8. The waste heat utilization system for the desulfurized clean flue gas according to claim 6, characterized in that: install air distribution plate (29), defroster (30) and hood (34) in flash evaporation absorption tank (7), intermediate position in flash evaporation absorption tank (7) is arranged in defroster (30), and air distribution plate (29) are installed to defroster (30) upper end, install a plurality of hoods (34) on air distribution plate (29).
9. The waste heat utilization system for the desulfurized clean flue gas according to claim 6, characterized in that: install tuber pipe (28), defroster (30) and baffling board (35) in flash evaporation absorption tank (7), intermediate position in flash evaporation absorption tank (7) is arranged in defroster (30), and two baffling boards (35) are misplaced and are fixed on flash evaporation absorption tank (7) inner wall, and fixed mounting has tuber pipe (28) on baffling board (35).
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| CN114111095A (en) * | 2021-11-30 | 2022-03-01 | 中国华能集团清洁能源技术研究院有限公司 | Desulfurization slurry flash evaporation heat taking and water taking system and method of open heat pump |
| CN114477335A (en) * | 2022-01-25 | 2022-05-13 | 山东国舜建设集团有限公司 | Desulfurization wastewater evaporation and concentration zero-emission system and process based on double circulation loops |
| WO2023097893A1 (en) * | 2021-11-30 | 2023-06-08 | 中国华能集团清洁能源技术研究院有限公司 | Vertically integrated desulfurization slurry flash evaporation heat extraction system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114111095A (en) * | 2021-11-30 | 2022-03-01 | 中国华能集团清洁能源技术研究院有限公司 | Desulfurization slurry flash evaporation heat taking and water taking system and method of open heat pump |
| WO2023097893A1 (en) * | 2021-11-30 | 2023-06-08 | 中国华能集团清洁能源技术研究院有限公司 | Vertically integrated desulfurization slurry flash evaporation heat extraction system |
| WO2023097895A1 (en) * | 2021-11-30 | 2023-06-08 | 中国华能集团清洁能源技术研究院有限公司 | Open-loop heat pump based grading heat taking and water taking system and method using desulfurization slurry flash evaporation |
| CN114477335A (en) * | 2022-01-25 | 2022-05-13 | 山东国舜建设集团有限公司 | Desulfurization wastewater evaporation and concentration zero-emission system and process based on double circulation loops |
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