CN109224825A - A kind of boiler smoke condensable particulate matter removal collaboration heat recovery system - Google Patents

A kind of boiler smoke condensable particulate matter removal collaboration heat recovery system Download PDF

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Publication number
CN109224825A
CN109224825A CN201811122778.4A CN201811122778A CN109224825A CN 109224825 A CN109224825 A CN 109224825A CN 201811122778 A CN201811122778 A CN 201811122778A CN 109224825 A CN109224825 A CN 109224825A
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China
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heat
water
cooling
flue gas
pipe
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CN201811122778.4A
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Inventor
许昌日
郝向宇
周文祥
刘丹丹
程俊峰
张开元
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Beijing SPC Environment Protection Tech Co Ltd
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Beijing SPC Environment Protection Tech Co Ltd
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Priority to CN201811122778.4A priority Critical patent/CN109224825A/en
Publication of CN109224825A publication Critical patent/CN109224825A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/002Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/80Semi-solid phase processes, i.e. by using slurries
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/96Regeneration, reactivation or recycling of reactants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases

Abstract

The present invention relates to a kind of boiler smoke condensable particulate matters to remove collaboration heat recovery system, system mainly includes desulfurizing tower, flue gas condenser, heat pump, heat-exchanger rig, sets gradually slurry pool, gas approach, slurries spraying layer, flue gas condenser, catch basin, cooling condensed water spraying layer, demister, exhaust pass in desulfurizing tower from top to bottom.The outer heat pump of desulfurizing tower is connected by cooling water circulating pump with flue gas condenser;Heat-exchanger rig is connect with cooling condensation spraying layer, while being also connected by cooling condensate circulating pump, self-cleaning filter with header tank, and header tank also passes through reuse water pump and is connected with slurry pool.The present invention realizes that 75% or more condensable Removal efficiency of particulate matter, smoke dust discharge concentration are lower than 5mg/Nm3While can be with recovered flue gas condensation heat for the UTILIZATION OF VESIDUAL HEAT INs such as heat supply, recycling heat accounts for the 40~45% of gross heat input, has effects of energy saving and emission reduction.

Description

A kind of boiler smoke condensable particulate matter removal collaboration heat recovery system
Technical field
The invention belongs to energy conservation and environmental protection, especially one of Air Pollution Control field boiler smoke condensables Grain object removal collaboration heat recovery system and method.
Background technique
Current China achieves larger achievement on traditional coal smoke type contamination control, realizes substantially by taking coal-burning power plant as an example Minimum discharge to NOx, flue dust and SO2 in coal-fired flue-gas.However fire coal boiler fume is removed containing flue dust and gaseous SO2,NOx Equal conventional pollutions beyond the region of objective existence, there is also the pollutant that one kind is condensable particulate matter, this kind of existing smoke gas treatment skills of matter utilization Art (such as SCR denitration, electrostatic or bag-type dusting, wet desulphurization) can not remove.
Coal fire discharged particulate matter can be divided into directly discharge in solid form may filter that particulate matter (filterable Particulate matter, FPM) and condensable particulate matter (Condensable Particulate Matter, CPM).Root According to the definition of US Gov Env Protection Agency (EPA), CPM refers to be existed in a gaseous form in flue, is emitted into atmosphere immediately Condense the substance of the solid-state or liquid particles object that are formed.From the perspective of morphology, CPM is mainly agglomerated by gaseous material, partial size one As less than 1 μm, belong to fine particle, be present in surrounding air in the form of an aerosol.It is various due to being usually enriched on CPM The pollutants such as heavy metal (such as Se, As, Pb, Cr) and PAHs (polycyclic aromatic hydrocarbon), mostly carcinogen and genotoxicity paramorphogen Matter, it is very harmful.
Analysis according to Louis A.Corio team of the U.S. to the 18 granular material discharged results of coal-fired flue-gas in the U.S., flue gas It is that account for total particle object amount average value be 51% to 49%, FPM that CPM, which accounts for total particle object amount average value, in particulate matter.This means that coal-fired CPM discharge amount is in phase same level, and its portion in the total emission volumn of PM10 and PM2.5 with FPM substantially in flue gas It is bigger, it can not be ignored.However, count at present it is granular material discharged only include FPM, the true discharge of Particulates from Coal Combustion cannot be represented Situation.It can be seen that control CPM discharge controls particulate matter of the coal-fired source to environmental emission to complete, realize that particulate matter subtracts to real Row has great significance.
Chinese patent CN104707432B discloses the system and side of dust and condensable particulate matter in collaboration removal flue gas Method, the patent make the saturation wet flue gas for being sprayed formation or nearly saturation wet flue gas cooling using the heat exchanger being arranged in spray column, So that dust and condensable particulate matter inside flue gas is formed drop and is separated from flue gas after growing up and remove condensable particulate matter. But it is limited using only heat exchanger cooling extent, and the waste heat after heat exchange does not also efficiently use.
Chinese patent CN204841384U discloses a kind of zero water consumption system of wet desulphurization, new on the basis of former desulfurizer Increase cooling condensation tower and heat exchanger, cooling circulating water and desulfurizing tower are exported into neat stress direct contact heat transfer in cooling condensation tower Cooling, and trapped the fine mist of condensation using spraying layer and deduster layer, realize the recycling of water, recirculated water is changed with air again Heat is cooling water temperature, the recycle-water from neat stress is realized, to reach zero water consume of desulphurization system.But the patent emphasis Water-saving, the removal of flue gas condensable particle is not related to, and system is relative complex, taken up a large area.
Summary of the invention
The present invention provides a kind of boiler smoke condensable particulate matter removal association to make up the limitation in above-mentioned technology Same heat recovery system, recuperation of heat utilizes while removing flue gas condensable particulate matter, achieves energy-saving and emission reduction purposes.
To achieve the above object, the technical scheme adopted by the invention is as follows:
A kind of boiler smoke condensable particulate matter removal collaboration heat recovery system, it is characterised in that: mainly include desulfurizing tower, Reclaiming system for condensation heat, cooling condense water circulation system, set gradually slurry pool, serum recycle from top to bottom in the desulfurizing tower Pump, serum recycle pipe, gas approach, slurries spraying layer, flue gas condenser, catch basin, cooling condensed water spraying layer, demister, Exhaust pass, the reclaiming system for condensation heat include the first cooling water-circulating pipe, cooling water circulating pump, the second cooling water circulation Pipe, heat pump, heat supply return pipe, heat supply water pipe, low pressure steam inlet pipe, steam condensation water pipe, the reclaiming system for condensation heat is also It is connected with external plant area low-pressure steam general pipeline, plant area's steam condensation pipe network, plant area's hot water pipe net, the cooling condensed water The circulatory system includes collector pipe, header tank, reuse water pump, self-cleaning filter, cooling condensate circulating pump, the first cooling condensation Water-circulating pipe, heat-exchanger rig, the second cooling condensate circulating water pipe, mist eliminator flushing water pipe, cold source import, cold source outlet.
Further, the heat pump by the first cooling water-circulating pipe and the second cooling water-circulating pipe, cooling water circulating pump with The flue gas condenser is connected, the heat pump also respectively with low pressure steam inlet pipe, steam condensation water pipe, heat supply water pipe, supply Hot return pipe is connected.
Further, heat exchanger tube uses snakelike form of tubes, heat exchanger tube length direction and flue gas flow direction in the flue gas condenser It is mutually perpendicular to.
Further, the low pressure steam inlet pipe is connected with plant area low-pressure steam general pipeline, the steam condensation water pipe with Plant area's steam condensation pipe network is connected, and the heat supply water pipe, heat supply return pipe and plant area hot water pipe net are connected.
Further, the catch basin is connected by collector pipe with header tank, and the header tank passes through reuse water pump and slurry Liquid pool is connected, and the header tank also passes through self-cleaning filter, cooling condensate circulating pump, the first cooling condensate circulating water pipe Be connected with heat-exchanger rig, the heat-exchanger rig also pass through the second cooling condensate circulating water pipe and mist eliminator flushing water pipe respectively with The cooling condensed water spraying layer is connected with the demister.
Further, the heat-exchanger rig also sets up cold source import and cold source and exports, the cold source can be sky gas and water or its His cold source.
The present invention also provides a kind of boiler smoke condensable particulate matters to remove collaboration heat recovery method, comprising the following steps:
N1. it is saturated into cooling after the flue gas of desulfurizing tower and slurries counter current contacting, saturation wet flue gas rises to flue gas condensing Device;
N2. flue gas condenser will be saturated wet flue gas temperature and reduce, and saturation wet flue gas reduces the water being precipitated and can coagulate because of temperature Tie particulate matter condensation growth near flue gas condenser, condensable particulate matter a part after condensation growth fall into slurry pool and by Removing, another part continue to rise to slurries spraying layer with wet flue gas;
N3. the sub-cooled condensed water that slurries spraying layer sprays further decreases flue-gas temperature, and saturation wet flue gas is precipitated more More water falls into collection with cooling condensed water with after cooling condensed water collision, washing after the further condensation growth of condensable particulate matter Enter header tank after sink;
N4. through slurries spraying layer, treated that flue gas enters demister, and drop is trapped by demister in flue gas, purified Flue gas is excluded by exhaust pass;
N5. the cooling water in flue gas condenser enters heat pump after absorbing the heat for being saturated wet flue gas, and heat release is dropped in heat pump Send flue gas condenser after temperature back to;
N6. the heat that heat supply return water absorbs cooling water releasing in heat pump once heats up, while steam is cold in sorption type heat pump Hot secondary temperature elevation is coagulated, steam condensate (SC) enters the processing of plant area's steam condensation water system, and the heat supply return water after heating enters plant area's heat Pipe network, the heat supply return water to cool down after heat supply reenter heat pump heat absorption heating;
N7. the particle water mixed liquid of header tank bottom coohng condensed water is periodically emitted into desulphurization tower slurry pool;Through from clearly Filter is washed treated cooling condensed water, heat-exchanger rig heat exchange cooling, a part of cooling condensed water are delivered to by circulating pump It is sent into the spraying layer of desulfurizing tower, another part is as desulfurizer mist eliminator flushing water reuse.
The beneficial effects of the present invention are:
(1) flue gas condenser is absorbed after wet flue gas heat by surface heat exchanging mode in heat using water as cold source in desulfurizing tower Heat release, which recirculates, in pump utilizes, and water consumption is few, pollution-free.Flue gas condenser makes to be saturated wet flue gas cooling precipitation largely simultaneously Water promotes growing up for condensable particulate matter;
(2) continue to continue to cool down with cooling condensed water counter current contacting cooling, condensable particulate matter through condensed wet flue gas Condensation growth, at the same with cooling condensed water collision, washing and further removed, most cut again through demister with drop afterwards It stays, completes the removal of condensable particulate matter in flue gas.
(3) using plant area's low-pressure steam as driving heat source, cooling water tow taste heat is recycled by absorption heat pump, Condensation heat of flue gas is transferred to supplying hot water, realizes the recycling of condensation heat of flue gas.
(4) further cooling condensation of the cooling condensing capacity that header tank is collected for desulfurization saturation wet flue gas, and one Divide the flushing of supplement desulfurizer mist eliminator or desulfurization slurry water, realizes water resource recycling.
(5) the condensable particle of a kind of boiler smoke condensable particulate matter removal collaboration heat recovery system provided by the invention 75% or more object removal rate, while smoke dust discharge concentration is also able to achieve lower than 5mg/Nm3
Detailed description of the invention
Fig. 1 is a kind of boiler smoke condensable particulate matter removal collaboration heat recovery system schematic diagram of the invention;
1-desulfurizing tower, 2-slurry pools, 3-gas approach, 4-slurries spraying layers, 5-flue gas condensers, 6-are catchmented Slot, 7-cooling condensed water spraying layers, 8-demisters, 9-exhaust pass, the 10-the first cooling water-circulating pipe, 11-cooling waters Circulating pump, the 12-the second cooling water-circulating pipe, 13-heat pumps, 14-heat supply return pipes, 15-heat supply water pipes, 16-low-pressure steams Inlet tube, 17-steam condensation water pipes, 18-slurry circulating pumps, 19-serum recycle pipes, 20-collector pipes, 21-header tanks, 22-reuse water pumps, 23-self-cleaning filters, 24-cooling condensate circulating pumps, the 25-the first cooling condensate circulating water pipe, It is 26-heat-exchanger rigs, the 27-the second cooling condensate circulating water pipe, 28-mist eliminator flushing water pipes, 29-cold source imports, 30-cold Source outlet.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings and specific examples, but invention which is intended to be protected is simultaneously It is without being limited thereto.
A kind of boiler smoke condensable particulate matter removal collaboration heat recovery system, mainly includes desulfurizing tower (1), flue gas condensing Device (5), heat pump (13), heat-exchanger rig (26), the desulfurizing tower (1) is inner to set gradually slurry pool (2), serum recycle from top to bottom Pump (18), serum recycle pipe (19), gas approach (3), slurries spraying layer (4), flue gas condenser (5), catch basin (6), cooling Condensed water spraying layer (7), demister (8), exhaust pass (9).The heat pump (13) by first cooling water-circulating pipe (10) and Second cooling water-circulating pipe (12), cooling water circulating pump (11) are connected with the flue gas condenser (5), and the heat pump (13) is also It is connected respectively with low pressure steam inlet pipe (16), steam condensation water pipe (17), heat supply water pipe (15), heat supply return pipe (14). Heat exchanger tube uses snakelike form of tubes in the flue gas condenser (5), and heat exchanger tube length direction is mutually perpendicular to flue gas flow direction.It is described Low pressure steam inlet pipe (16) is connected with plant area low-pressure steam general pipeline, the steam condensation water pipe (17) and plant area's steam condensation Pipe network is connected, and the heat supply water pipe (15), heat supply return pipe (14) and plant area hot water pipe net are connected.
Catch basin (6) of the present invention is connected by collector pipe (20) with header tank (21), and the header tank (21) is logical It crosses reuse water pump (22) to be connected with slurry pool (2), the header tank (21) also passes through self-cleaning filter (23), cooling condensation Water-circulating pump (24), first cooling condensate circulating water pipe (25) are connected with heat-exchanger rig (26), and the heat-exchanger rig (26) is also By second cooling condensate circulating water pipe (27) and mist eliminator flushing water pipe (28) respectively with the cooling condensed water spraying layer (7) It is connected with the demister (8).The heat-exchanger rig (26) also sets up cold source import (29) and cold source outlet (30), described cold Source can be sky gas and water or other cold sources.The heat pump (13) uses absorption heat pump, and driving heat source is steam, lithium bromide is molten Liquid is absorbent, water is evaporant.
A kind of boiler smoke condensable particulate matter removal collaboration heat recovery method provided by the invention, using a kind of above-mentioned pot Kiln gas condensable particulate matter removal collaboration heat recovery system, comprising the following steps:
N1. enter the flue gas of desulfurizing tower (1) and the slurries counter current contacting of slurries spraying layer (4) ejection through gas approach (3) Cooling saturation afterwards, saturation wet flue gas rise to flue gas condenser (5);
N2. saturation wet flue gas passes through flue gas condenser (5), using cooling water as flue gas condenser (5) cold source by flue gas Temperature reduces, and saturation wet flue gas reduces the water being precipitated and condensable particulate matter near flue gas condenser (5) heat exchanger tube because of temperature Condensation growth, condensable particulate matter a part after condensation growth fall into slurry pool (2) with condensate liquid and are removed, another part Subsequent cooling condensed water spraying layer (7) is continued to rise to wet flue gas;
N3. it cools down the sub-cooled condensed water that condensed water spraying layer (7) adverse current sprays and further decreases flue-gas temperature, be saturated More water are precipitated in wet flue gas, with cooling after colliding, wash with cooling condensed water after the further condensation growth of condensable particulate matter Condensed water falls into catch basin (6) and enters header tank (21) afterwards;
N4. through cooling condensed water spraying layer (7) treated, flue gas enters demister (8), and drop is by demister in flue gas Trapping, thus the remaining condensable particulate matter that removal is adsorbed by drop, purified flue gas is excluded by exhaust pass (9);
N5. the cooling water in above-mentioned n2 step enters heat after flue gas condenser (5) absorb the heat of saturation wet flue gas It pumps (13), is sent into flue gas condenser (5) after heat release cooling in heat pump and absorbs heat again, cycle operation.
N6. heat supply return water absorption in heat pump (13) simultaneously once heats up from the heat that cooling water is released, while to steam Vapour is that steam condensation heat secondary temperature elevation, steam condensate (SC) enter plant area's steam condensation water system in sorption type heat pump (13) under driving heat source System processing, the supplying hot water after heating enter plant area's hot water pipe net, carry out recuperation of heat utilization, the heat supply return water to cool down after heat supply Reenter heat pump (13) heat absorption heating, cycle operation;
N7. heavy through self gravity settlement action into particulate matter in the cooling condensed water of header tank (21) in above-mentioned n3 step For product in header tank (21) bottom, header tank (21) bottom particles water mixed liquid is emitted into desulfurization by regular utilization reuse water pump (22) Tower (1) slurry pool (2);Supernatant is delivered to by cooling condensate circulating pump (24) after self-cleaning filter (23) are handled and is changed Thermal (26), cooling condensed water are cold in heat-exchanger rig (26) and external cold source heat exchange cooling rear portion feeding desulfurizing tower (1) But condensed water spraying layer (7), spray traps condensable particulate matter again, and cycle operation, another part is as desulfurizing tower (1) demisting Device (8) flushing water reuse.
Inventive desulfurization tower (1) inlet flue gas cools down at wet through slurries spraying layer (4) at saturation wet flue gas, subsequently into cigarette Gas condenser (5);It is saturated wet flue gas and passes through flue gas condenser (5) cooling and the water and condensable particulate matter of precipitation in flue gas condensing The neighbouring condensation growth of device (5) heat exchanger tube, condensable particulate matter a part after condensation growth fall into slurry pool (2) with condensate liquid and It is removed, another part continues to rise to subsequent cooling condensed water spraying layer (7) with wet flue gas;Cooling condensed water spraying layer (7) the sub-cooled condensed water that adverse current sprays further decreases flue-gas temperature, and more water, condensable is precipitated in saturation wet flue gas Catch basin (6), which is fallen into, with cooling condensed water after colliding, wash with cooling condensed water after the grain further condensation growth of object enters collection afterwards Water tank (21);Through cooling condensed water spraying layer (7) treated, flue gas enters demister (8), and drop is caught by demister in flue gas Collection, thus the remaining condensable particulate matter that removal is adsorbed by drop, purified flue gas is excluded by exhaust pass (9), at this time 75% or more condensable Removal efficiency of particulate matter, while smoke dust discharge concentration is also able to achieve lower than 5mg/Nm3
Cooling water enters heat pump (13) after absorbing the heat for being saturated wet flue gas in above-mentioned flue gas condenser (5), in heat pump It is sent into flue gas condenser (5) after heat release cooling to absorb heat again, cycle operation.Heat supply return water is absorbed in heat pump (13) and is come from simultaneously The heat that cooling water is released once heats up, at the same using steam as driving heat source under the secondary liter of steam condensation heat in sorption type heat pump (13) Temperature, steam condensate (SC) enter the processing of plant area's steam condensation pipe network, and the supplying hot water after heating enters plant area's hot water pipe net, carry out heat It recycles, the heat supply return water to cool down after heat supply reenters heat pump (13) heat absorption and heats up, cycle operation, the above process Heat pump recovered flue gas condensation heat accounts for the 40~45% of gross heat input, and energy-saving effect is obvious;Into the cooling condensation of header tank (21) Particulate matter is deposited on header tank (21) bottom through self gravity settlement action in water, and regular utilization reuse water pump (22) is by header tank (21) bottom particles water mixed liquid is emitted into desulfurizing tower (1) slurry pool (2);Supernatant leads to after self-cleaning filter (23) are handled Supercooling condensate circulating pump (24) is delivered to heat-exchanger rig (26), and cooling condensed water is through heat-exchanger rig (26) cooling rear portion It is sent into desulfurizing tower (1) cooling condensed water spraying layer (7), spray trapping condensable particulate matter, cycle operation, another part are made again For desulfurizing tower (1) demister (8) flushing water reuse, water resource recycling is realized.
Embodiment 1
Referring to Fig.1, for the coal-burning boiler of capacity 75t/h, desulfurizing tower (1) entrance amount of theoretical flue gas about 110000Nm3/ h, The temperature of saturation wet flue gas after slurries spraying layer (4) drops to about 50 DEG C, subsequently into flue gas condenser (5);It is saturated wet cigarette Gas passes through flue gas condenser (5), uses water as cold source, flue-gas temperature is reduced about 2 DEG C, saturation wet flue gas is reduced due to temperature The water of precipitation and condensable particulate matter condensation growth near flue gas condenser (5) heat exchanger tube, the condensable after condensation growth Grain object a part falls into slurry pool (2) with condensate liquid and is removed, and another part continues to rise to subsequent cooling with wet flue gas Condensed water spraying layer (7);The sub-cooled condensed water that cooling condensed water spraying layer (7) adverse current sprays further decreases flue-gas temperature 3~5 DEG C, more water are precipitated in saturation wet flue gas, collide, wash with cooling condensed water after the further condensation growth of condensable particulate matter Catch basin (6), which is fallen into, with cooling condensed water after washing enters header tank (21) afterwards;Through cooling condensed water spraying layer (7) treated cigarette Gas enters demister (8), and drop is trapped by demister in flue gas, thus the remaining condensable particulate matter that removal is adsorbed by drop, Purified flue gas is excluded by exhaust pass (9), at this time 75% or more condensable Removal efficiency of particulate matter, while being also able to achieve cigarette Dirt concentration of emission is lower than 5mg/Nm3
Cooling water enters heat pump (13) after absorbing the heat for being saturated wet flue gas in above-mentioned flue gas condenser (5), in heat pump It is sent into flue gas condenser (5) after heat release cooling to absorb heat again, cycle operation.Heat supply return water is absorbed in heat pump (13) and is come from simultaneously The heat that cooling water is released once heats up, at the same using steam as driving heat source under the secondary liter of steam condensation heat in sorption type heat pump (13) Temperature, steam condensate (SC) enter the processing of plant area's steam condensation water system, and the supplying hot water after heating enters plant area's hot water pipe net, carry out heat It recycles, the heat supply return water to cool down after heat supply reenters heat pump (13) heat absorption and heats up, cycle operation, the above process Heat pump recovered flue gas condensation heat accounts for the 40~45% of gross heat input, and energy-saving effect is obvious;Into the cooling condensation of header tank (21) Particulate matter is deposited on header tank (21) bottom through self gravity settlement action in water, and regular utilization reuse water pump (22) is by header tank (21) bottom particles water mixed liquid is emitted into desulfurizing tower (1) slurry pool (2);Supernatant leads to after self-cleaning filter (23) are handled Supercooling condensate circulating pump (24) is delivered to heat-exchanger rig (26), and cooling condensed water is changed in heat-exchanger rig (26) with outside air 4~5 DEG C of rear portions of heat drop temperature are sent into desulfurizing tower (1) cooling condensed water spraying layer (7), again spray trapping condensable particle Object, cycle operation, another part is as desulfurizing tower (1) demister (8) flushing water reuse.Supplement desulfurizing tower removes in above process Day with fog rinses or desulfurization slurry water about 2.4~2.8t/h, realizes water resource recycling.
Embodiment 2
Referring to Fig.1, for 300MW Class Coal Fired Boilers, desulfurizing tower (1) entrance amount of theoretical flue gas about 120000Nm3/ h, warp The temperature of saturation wet flue gas after slurries spraying layer (4) drops to about 54 DEG C, flue gas condensable particulate matter removal collaboration recuperation of heat system It unites similar to Example 1, uses water as cold source, flue-gas temperature is reduced about 1 DEG C, cooling condensed water spraying layer (7) adverse current is sprayed Sub-cooled condensed water out further decreases 2~4 DEG C of flue-gas temperature, at this time 75% or more condensable Removal efficiency of particulate matter, together When be also able to achieve smoke dust discharge concentration lower than 5mg/Nm3.Heat pump recovered flue gas condensation heat accounts for the 40~45% of gross heat input;Into The cooling condensed water of header tank (21) is in heat-exchanger rig (26) and 4~5 DEG C of latter portions of external plant area's recirculated cooling water heat exchange cooling It is distributed into desulfurizing tower (1) cooling condensed water spraying layer (7), another part is as desulfurizing tower (1) demister (8) flushing water reuse. Desulfurizer mist eliminator flushing or desulfurization slurry water about 5.8~6.3t/h are supplemented during this, realize water resource recycling.
The present invention realizes that 75% or more condensable Removal efficiency of particulate matter, smoke dust discharge concentration are lower than 5mg/Nm3While can With recovered flue gas condensation heat for UTILIZATION OF VESIDUAL HEAT INs such as heat supplies, recycling heat accounts for the 40~45% of gross heat input, has energy-saving and emission-reduction Effect.
The above is a preferred embodiment of the present invention, it is noted that for those skilled in the art For, without departing from the principles of the present invention, it can also make several improvements and retouch, these improvements and modifications It should be regarded as protection scope of the present invention.

Claims (10)

1. a kind of boiler smoke condensable particulate matter removal collaboration heat recovery system, it is characterised in that: including desulfurizing tower and divide The reclaiming system for condensation heat that is not connected with the desulfurizing tower and cooling condensation water circulation system, the desulfurizing tower is from top to bottom successively Setting slurry pool, slurry circulating pump, serum recycle pipe, gas approach, slurries spraying layer, flue gas condenser, catch basin, cooling are solidifying Spraying layer, demister, exhaust pass are born water, the reclaiming system for condensation heat includes the first cooling water-circulating pipe, cooling water circulation Pump, the second cooling water-circulating pipe, heat pump, heat supply return pipe, heat supply water pipe, low pressure steam inlet pipe, steam condensation water pipe, it is described Cooling condensation water circulation system includes collector pipe, header tank, reuse water pump, self-cleaning filter, cooling condensate circulating pump, the One cooling condensate circulating water pipe, heat-exchanger rig, the second cooling condensate circulating water pipe, mist eliminator flushing water pipe, cold source import, cold source Outlet.
2. a kind of boiler smoke condensable particulate matter removal collaboration heat recovery system according to claim 1, feature exist In: the heat pump passes through the first cooling water-circulating pipe and the second cooling water-circulating pipe, cooling water circulating pump and the flue gas condensing Device is connected.
3. a kind of boiler smoke condensable particulate matter removal collaboration heat recovery system according to claim 1, feature exist In: the heat pump is connected with low pressure steam inlet pipe, steam condensation water pipe, heat supply water pipe, heat supply return pipe respectively.
4. a kind of boiler smoke condensable particulate matter removal collaboration heat recovery system according to claim 1, feature exist In: the flue gas condenser includes heat exchanger tube, and the heat exchanger tube uses snakelike form of tubes, heat exchanger tube length direction and flue gas flow direction It is mutually perpendicular to.
5. a kind of boiler smoke condensable particulate matter removal collaboration heat recovery system according to claim 1, feature exist In: the low pressure steam inlet pipe is connected with plant area low-pressure steam general pipeline, the steam condensation water pipe and plant area's steam condensation Pipe network is connected, and the heat supply water pipe, heat supply return pipe and plant area hot water pipe net are connected.
6. a kind of boiler smoke condensable particulate matter removal collaboration heat recovery system according to claim 1, feature exist In: the catch basin is connected by collector pipe with header tank, and the header tank is connected by reuse water pump with slurry pool.
7. a kind of boiler smoke condensable particulate matter removal collaboration heat recovery system according to claim 1, feature exist In: the header tank passes through self-cleaning filter, cooling condensate circulating pump, the first cooling condensate circulating water pipe and heat-exchanger rig It is connected.
8. a kind of boiler smoke condensable particulate matter removal collaboration heat recovery system according to claim 1, feature exist In: the heat-exchanger rig is sprayed with the cooling condensed water respectively by the second cooling condensate circulating water pipe and mist eliminator flushing water pipe Drenching layer is connected with the demister.
9. a kind of according to claim 1, boiler smoke condensable particulate matter removal collaboration heat recovery system described in 7 or 8, special Sign is: the heat-exchanger rig setting cold source import and cold source export, and the cold source can be sky gas and water or other cold sources.
10. a kind of boiler smoke condensable particulate matter removal collaboration heat recovery method, based on described in one of claim 1-9 one Kind boiler smoke condensable particulate matter removal collaboration heat recovery system, comprising the following steps:
N1. it is saturated into cooling after the flue gas of desulfurizing tower and slurries counter current contacting, saturation wet flue gas rises to flue gas condenser;
N2. flue gas condenser will be saturated wet flue gas temperature and reduce, and saturation wet flue gas reduces the water being precipitated and condensable because of temperature Grain object condensation growth near flue gas condenser, condensable particulate matter a part after condensation growth fall into slurry pool and are taken off It removes, another part continues to rise to slurries spraying layer with wet flue gas;
N3. the sub-cooled condensed water that slurries spraying layer sprays further decreases flue-gas temperature, and saturation wet flue gas is precipitated more Water falls into catch basin with cooling condensed water with after cooling condensed water collision, washing after the further condensation growth of condensable particulate matter Enter header tank afterwards;
N4. through slurries spraying layer, treated that flue gas enters demister, and drop is trapped by demister in flue gas, purified flue gas It is excluded by exhaust pass;
N5. the cooling water in flue gas condenser enters heat pump after absorbing the heat for being saturated wet flue gas, in heat pump after heat release cooling Send flue gas condenser back to;
N6. the heat that heat supply return water absorbs cooling water releasing in heat pump once heats up, while steam condensation heat in sorption type heat pump Secondary temperature elevation, steam condensate (SC) enter the processing of plant area's steam condensation water system, and the heat supply return water after heating enters plant area's hot-water line Net, the heat supply return water to cool down after heat supply reenter heat pump heat absorption heating;
N7. the particle water mixed liquid of header tank bottom coohng condensed water is periodically emitted into desulphurization tower slurry pool;Through self-cleaning Filter treated cooling condensed water, is delivered to heat-exchanger rig heat exchange cooling by circulating pump, a part of cooling condensed water is sent into The spraying layer of desulfurizing tower, another part is as desulfurizer mist eliminator flushing water reuse.
CN201811122778.4A 2018-09-26 2018-09-26 A kind of boiler smoke condensable particulate matter removal collaboration heat recovery system Pending CN109224825A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110227332A (en) * 2019-06-14 2019-09-13 无锡市东方环境工程设计研究所有限公司 The dehumidification purification system of depth containing wet flue gas
CN111167293A (en) * 2020-01-07 2020-05-19 无锡市华星电力环保修造有限公司 Method and equipment for FWGD cooperative fine particulate matter and SO3 removal
CN111659231A (en) * 2019-03-06 2020-09-15 中国石油化工股份有限公司 Flue gas desulfurization and fog dispersal device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111659231A (en) * 2019-03-06 2020-09-15 中国石油化工股份有限公司 Flue gas desulfurization and fog dispersal device
CN111659231B (en) * 2019-03-06 2022-03-08 中国石油化工股份有限公司 Flue gas desulfurization and fog dispersal device
CN110227332A (en) * 2019-06-14 2019-09-13 无锡市东方环境工程设计研究所有限公司 The dehumidification purification system of depth containing wet flue gas
CN111167293A (en) * 2020-01-07 2020-05-19 无锡市华星电力环保修造有限公司 Method and equipment for FWGD cooperative fine particulate matter and SO3 removal

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