CN213699389U - Flue gas waste heat recovery and white system that disappears - Google Patents
Flue gas waste heat recovery and white system that disappears Download PDFInfo
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- CN213699389U CN213699389U CN202021957572.6U CN202021957572U CN213699389U CN 213699389 U CN213699389 U CN 213699389U CN 202021957572 U CN202021957572 U CN 202021957572U CN 213699389 U CN213699389 U CN 213699389U
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Abstract
The utility model relates to the technical field of coal-fired power plant flue gas dehydration and white elimination, in particular to a flue gas waste heat recovery and white elimination system, which comprises an MVR evaporation concentrator A, a heat exchanger B, a spray tower C and a filter D, wherein a first outlet 8 of the MVR evaporation concentrator A is connected with a first inlet 4 of the spray tower C, a second inlet 1 of the spray tower C is used for introducing the flue gas discharged by a power plant boiler, a bottom outlet 3 of the spray tower C is communicated with an inlet 5 of the filter D, an outlet 6 of the filter D is communicated with an inlet 7 of the MVR evaporation concentrator A, a second outlet 9 of the MVR evaporation concentrator A is communicated with a first inlet 11 of the heat exchanger B, a second inlet 12 of the heat exchanger B is used for introducing low-temperature condensation water, an outlet 13 of the heat exchanger B is used for leading out the low-temperature condensation water to return to the boiler, the MVR evaporation concentration technology and a calcium chloride moisture absorption principle are, the aim of eliminating the white smoke and recovering the moisture in the smoke is achieved.
Description
Technical Field
The utility model relates to a coal fired power plant flue gas dehydration white technical field that disappears especially relates to a flue gas waste heat recovery and white system that disappears.
Background
The temperature of flue gas generated after wet desulphurization of a coal-fired boiler of a coal-fired power plant in China is reduced to 45-55 ℃, flue gas at a desulphurization outlet is saturated humidity, the flue gas contains a large amount of water vapor, and the water vapor contains more soluble salts, SO3, gel dust, micro dust and the like (which are main components of haze). The part has a high contribution rate to haze, so that the requirements of eliminating white smoke in many areas in China are provided for reducing environmental pollution.
At present, the smoke whitening technology in China mainly comprises several technical routes of direct smoke heating and discharging, smoke cooling and discharging, and smoke cooling and reheating and discharging, wherein the defects of high system operation energy consumption, blockage of reheater equipment and the like exist in the direct smoke heating and discharging and the smoke cooling and reheating discharging, and after the direct smoke cooling and discharging, the discharged smoke is still the smoke with saturated humidity, so that the requirement of smoke whitening cannot be met at present.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
To prior art not enough, the utility model provides an utilize MVR evaporative concentration technique and calcium chloride moisture absorption principle, realize low-cost operation, reach the flue gas and disappear white and retrieve the flue gas waste heat recovery of the moisture in the flue gas and disappear white system.
(II) technical scheme
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a flue gas waste heat recovery and white system that disappears, includes MVR evaporative concentrator A, heat exchanger B, spray column C, filter D, MVR evaporative concentrator A's first export 8 is connected with spray column C's first entry 4, spray column C's second entry 1 is used for letting in the outer row flue gas of power plant's boiler, spray column C's bottom export 3 and filter D's entry 5 intercommunication, filter D's export 6 and MVR evaporative concentrator A's entry 7 intercommunication, MVR evaporative concentrator A's second export 9 and heat exchanger B's first entry 11 intercommunication, heat exchanger B's second entry 12 is used for letting in low temperature condensate water, heat exchanger B's first export 13 is used for deriving low temperature condensate water and returns the boiler, heat exchanger B's second export 14 is the comdenstion water discharge port.
Preferably, at least one layer of spraying device is arranged in the spraying tower C, a wire mesh demister is arranged at the top of the spraying tower C, a tubular deep demister is arranged above the wire mesh demister, and a buffer reservoir is arranged at the bottom of the spraying tower C.
Preferably, the MVR evaporation concentrator A mainly comprises a preheater, a heater, a circulating pump, a circulating pipeline, an evaporating pot, a vapor compressor, a vacuum pump and a water storage tank body, wherein the preheater adopts a tubular three-phase flow preheater, the heater adopts a self-cleaning evaporator, the heating part of the evaporating pot adopts a tubular heater, and the vapor compressor adopts one of a high-speed centrifugal two-stage vapor compressor, a single screw, a double-screw vapor compressor and a Roots type vapor compressor.
Preferably, the filter D is a sand filter or a fiber filter.
Preferably, the heat exchanger B is a plate heat exchanger.
(III) advantageous effects
Compared with the prior art, the utility model provides a flue gas waste heat recovery and white system that disappears possesses following beneficial effect:
1. this flue gas waste heat recovery and white system that disappears realizes that the flue gas disappears white, solves the defect that current white device that disappears in the operation flue gas blocks up, clearance is frequent, realizes the mummification of flue gas, realizes that the flue gas disappears white.
2. This flue gas waste heat recovery and white system that disappears, a large amount of moisture in the recovery flue gas, solved the defect that moisture can not high-efficiently be retrieved in the low temperature flue gas, the using water of power plant is practiced thrift to solid particles such as gypsum in the reduction flue gas is by a wide margin discharged to atmosphere, has purified the flue gas.
3. The flue gas waste heat recovery and white elimination system realizes flue gas waste heat recovery and reduces coal consumption of a coal-fired boiler of a power plant.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the utility model relates to a flue gas waste heat recovery and white elimination system, which comprises an MVR evaporation concentrator a, a heat exchanger B, a spray tower C and a filter D, wherein a first outlet 8 of the MVR evaporation concentrator a is connected with a first inlet 4 of the spray tower C and is used for introducing a saturated calcium chloride solution with a concentration of more than 56% into the spray tower C, a second inlet 1 of the spray tower C is used for introducing exhaust flue gas of a power plant boiler, a bottom outlet 3 of the spray tower C is communicated with an inlet 5 of the filter D, an outlet 6 of the filter D is communicated with an inlet 7 of the MVR evaporation concentrator a, a second outlet 9 of the MVR evaporation concentrator a is communicated with a first inlet 11 of the heat exchanger B, a second inlet 12 of the heat exchanger B is used for introducing low-temperature condensed water, a first outlet 13 of the heat exchanger B is used for guiding out the low-temperature condensed water to return to the boiler, a second outlet 14 of the heat exchanger B is a condensed water, at least one layer of spraying device is arranged in the spraying tower C, a wire mesh demister is arranged at the top of the spraying tower C, a tubular depth demister is arranged above the wire mesh demister, a buffer reservoir is arranged at the bottom of the spraying tower C, the MVR evaporation concentrator A is industrial common equipment and mainly comprises a preheater, a heater, a circulating pump, a circulating pipeline, an evaporation tank, a vapor compressor, a vacuum pump and a water storage tank body, the preheater adopts a tubular three-phase flow preheater, the heater adopts a self-cleaning evaporator, the heating part of the evaporation tank adopts a tubular heater, the steam compressor adopts one of a high-speed centrifugal two-stage steam compressor, a single screw rod, a double screw rod steam compressor and a Roots type steam compressor, the filter D adopts a sand filter or a fiber filter, and the heat exchanger B adopts a plate heat exchanger.
A first outlet 8 of the MVR evaporation concentrator A is connected with a first inlet 4 of a spray tower C and is used for introducing a saturated calcium chloride solution with the concentration more than 56% into the spray tower C, flue gas discharged by a power plant boiler at about 50 ℃ is introduced into an inlet 1 of the spray tower C, the flue gas is in full contact with the calcium chloride spray solution in the spray tower C, and is subjected to mass transfer, heat exchange and adsorption, moisture in the flue gas is adsorbed into the calcium chloride solution, the calcium chloride solution is diluted and then enters a filter D from a bottom outlet 3 of the spray tower C, impurities in the calcium chloride solution are removed through filtration, the flue gas is led out from an outlet 6 and returns to the MVR evaporation concentrator A for evaporation concentration, the concentrated calcium chloride solution is discharged from an outlet 8 and enters the spray tower C through evaporation concentration of the MVR evaporation concentrator A to realize cyclic utilization, high-temperature condensation water of the MVR evaporation concentrator A enters a heat exchanger B for heat exchange, the low-temperature condensed water of the power plant is introduced into a second inlet 12 of the heat exchanger B, the low-temperature condensed water after temperature rise, which is led out from a first outlet 13 of the heat exchanger B, returns to the boiler to preheat the low-temperature condensed water of the boiler, so that the waste heat is recovered to the boiler, and the condensed water evaporated by the calcium chloride solution after temperature reduction is discharged from a second outlet 14 of the heat exchanger B.
The utility model discloses a flue gas waste heat recovery and white system that disappears, realize that the flue gas disappears white, solve the existing white device that disappears in service flue gas jam, clearance frequent defect, realize the mummification of flue gas, realize the flue gas disappears white; a large amount of moisture in the flue gas is recovered, the defect that the moisture in the low-temperature flue gas cannot be efficiently recovered is overcome, the water used by a power plant is saved, the emission of solid particles such as gypsum and the like in the flue gas to the atmosphere is greatly reduced, and the flue gas is purified; the flue gas waste heat recovery is realized, and the coal consumption of the coal-fired boiler of the power plant is reduced.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. A flue gas waste heat recovery and white elimination system is characterized by comprising an MVR evaporation concentrator A, a heat exchanger B, a spray tower C and a filter D, a first outlet (8) of the MVR evaporation concentrator A is connected with a first inlet (4) of a spray tower C, the utility model discloses a low-temperature condensation water boiler, including spray tower C, filter D, MVR evaporation concentrator A, heat exchanger B, spray tower C's second entry (1) is used for letting in the outer exhaust flue gas of power plant's boiler, spray tower C's bottom export (3) and filter D's entry (5) intercommunication, filter D's export (6) and MVR evaporation concentrator A's entry (7) intercommunication, MVR evaporation concentrator A's second export (9) and heat exchanger B's first entry (11) intercommunication, heat exchanger B's second entry (12) are used for letting in low temperature condensation water, heat exchanger B's first export (13) are used for deriving low temperature condensation water and return the boiler, heat exchanger B's second export (14) are.
2. The system for recovering and eliminating white smoke and waste heat according to claim 1, wherein at least one layer of spraying device is arranged inside the spray tower C, the top of the spray tower C is provided with a wire mesh demister, a tubular depth demister is arranged above the wire mesh demister, and the bottom of the spray tower C is provided with a buffer reservoir.
3. The system for recovering waste heat of flue gas and eliminating white spots of the smoke according to claim 1, wherein the MVR evaporative concentrator A mainly comprises a preheater, a heater, a circulating pump, a circulating pipeline, an evaporating pot, a vapor compressor, a vacuum pump and a water storage tank body, the preheater adopts a tubular three-phase flow preheater, the heater adopts a self-cleaning evaporator, the heating part of the evaporating pot adopts a tubular heater, and the vapor compressor adopts one of a high-speed centrifugal two-stage vapor compressor, a single screw, a double screw vapor compressor and a Roots vapor compressor.
4. The system for recovering the waste heat of the flue gas and eliminating the white content of the flue gas as claimed in claim 1, wherein the filter D is a sand filter or a fiber filter.
5. The system for recovering the waste heat of the flue gas and eliminating the white cast according to claim 1, wherein the heat exchanger B is a plate heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021957572.6U CN213699389U (en) | 2020-09-09 | 2020-09-09 | Flue gas waste heat recovery and white system that disappears |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021957572.6U CN213699389U (en) | 2020-09-09 | 2020-09-09 | Flue gas waste heat recovery and white system that disappears |
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| Publication Number | Publication Date |
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| CN213699389U true CN213699389U (en) | 2021-07-16 |
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| CN202021957572.6U Active CN213699389U (en) | 2020-09-09 | 2020-09-09 | Flue gas waste heat recovery and white system that disappears |
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Effective date of registration: 20230504 Address after: No. A2176, 2nd Floor, College Park, Zhongguancun Dongsheng Science and Technology Park, No.18 Xueqing Road, Haidian District, Beijing, 100088 Patentee after: Beijing shangruoshui Environmental Protection Technology Co.,Ltd. Address before: 4010, 4011, 2 Huatian Road, Huayuan Industrial Zone, Binhai New Area, Tianjin 300450 Patentee before: Qingdazhongneng (Tianjin) Environmental Protection Technology Co.,Ltd. |
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