CN109663490A - Wet desulfurization flue gas condenser system and flue gas condensing method with water balance function - Google Patents
Wet desulfurization flue gas condenser system and flue gas condensing method with water balance function Download PDFInfo
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- CN109663490A CN109663490A CN201811648313.2A CN201811648313A CN109663490A CN 109663490 A CN109663490 A CN 109663490A CN 201811648313 A CN201811648313 A CN 201811648313A CN 109663490 A CN109663490 A CN 109663490A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/002—Separation 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/96—Regeneration, reactivation or recycling of reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
Abstract
The invention discloses a kind of wet desulfurization flue gas condenser systems with water balance function.It includes sprayed slurry heat-exchange system, cooling water recirculation system and water balance system；The water balance system includes mist eliminator flushing pump, more medium filter, rotational flow station between the absorption tower stock tank and the more medium filter, demister and mist eliminator flushing water lines in the desulfuration absorbing tower and positioned at the spraying layer top；Absorption tower stock tank lower part is equipped with the mist eliminator flushing water lines company for being passed through the demister, is successively arranged the mist eliminator flushing pump, rotational flow station, the more medium filter in the mist eliminator flushing water lines.The present invention has through water balance system while reducing water consume, guarantees the unaffected advantage of the water balance of desulphurization system.The invention also discloses the flue gas condensing methods of the wet desulfurization flue gas condenser system with water balance function.
Description
Technical field
The present invention relates to wet desulfurization flue gas condenser systems, more specifically say it is a kind of wet process with water balance function
Desulfurization fume condenser system.The invention further relates to the flue gas condensing sides of the wet desulfurization flue gas condenser system with water balance function
Method.
Background technique
Domestic thermal power plant has completed the minimum discharge environmental protection technology transformation of a new round substantially at present.From present case
It sees, thermal power plant is by low nitrogen burning transformation, denitrating flue gas transformation, cleaner reform, desulfurizing fly ash in furnace etc., standard limit of smog release
Meet minimum discharge NOx、SO2And dust emission standard.Desulfurizing tower (wet electrical dust precipitator) exports wet saturated flue gas and directly passes through cigarette
Chimney discharge, although pollutant discharge amount is limited, forms white plume in chimney breast, biggish with ambient humidity in winter
Area, white plume tail is longer, forms visual pollution and may cause certain pressure from public opinion.
Flue gas is carried out to condense on the one hand can tighten control dust, SO3The discharge amount of equal pollutants, reduces dust China
Atmospheric environment causes serious pollution；On the one hand the water consumption that can reduce power plant desulfurization, increases economic efficiency, and saves water money
Source.As various regions government organs constantly put into effect the regulation that related flue gas takes off white improvement and exhaust gas temperature control, need to develop at present
A kind of novel wet desulfurization flue gas condenser system, can reach reduces dust, SO3The discharge amount of equal pollutants, and can be certainly
The dynamic water balance for maintaining desulphurization system.
That there are treatment quantities is big, flue gas cool-down heat exchange amount is big, flue gas cool-down cold source is not easy to select for flue gas condensing system at present
The problems such as taking, simultaneously because condensation process, which has a large amount of condensed water, enters desulphurization system, weighing to previous level, it is certain to cause
Destruction in degree is difficult when especially various regions policy requirements flue-gas temperature reduction amplitude is larger in winter through former desulfurization system
The Self-regulation ability of system keeps water balance.
It is existing application No. is CN201810371497.6, patent name is " wet desulfurization flue gas disappear white system ", disclosure
The wet desulfurization flue gas that a kind of desulfurizer mist eliminator flushing water of collection can be used as U-shaped catch basin self-cleaning disappears white system, but
It achievees the effect that water balance by recycling mist eliminator flushing water recycling, has the disadvantage in that and 1) increases catch basin
Return water system occupies the space between spraying layer and demister for transformation project, may influence the effect of demister
Fruit need to increase absorption tower to arrange the tank systems that catchment, integrated engineering amount is significantly if you need to guarantee the defogging effect of demister
Increase；2) mist eliminator flushing water need to use the lesser clear water of solid content, and mist eliminator flushing water can be by demisting while rinsing
The solid particle adhered on device is brought into flushing water, is collected using buffer tank to mist eliminator flushing water, and water tank sheet
The function that body is not separated by solid-liquid separation, if you need to which the mist eliminator flushing water clear liquid of collection to be obviously layered, due to contained solid in flushing water
Body grain diameter is smaller, need to stand the long period and can be only achieved the effect of layering, and the operation of mist eliminator flushing water system is frequently,
Therefore it uses clear liquid to be used as mist eliminator flushing water and improper.
Existing number of patent application are as follows: CN201810729913.5, patent name are a kind of " desulfurization fume plume improvement system
System " disclose it is a kind of pre- cool exchanger is set on desulfurizing tower gas approach, condensation is set gradually on desulfurizing tower exhaust pass
A kind of desulfurization fume plume governing system of cooler, pre- heat exchanger.But it is by arranging that condensate cooler reaches in flue
Condensation effect has the disadvantage in that 1) comparison increases condensing heat exchanger in slurries, and being arranged in slurries is liquid-liquid heat exchange,
Being arranged in flue gas is liquid-gas heat exchange, and liquid-liquid heat exchanger overall heat exchange coefficient ratio liquid-gas heat exchanger overall heat exchange coefficient is high
Close to 10 times, therefore increasing condensing heat exchanger equipment heat exchange area in flue gas can be much larger with overall volume weight, greatly improves
Manufacturing cost；2) it is arranged in the high-altitude in the heat exchanger mounting height on net flue usually near 40 meters away from ground, is arranged in
The heat exchanger mounting height of recycle slurry liquid pipe is typically not greater than 10 meters away from ground, simultaneously because the big weight weight of heat exchanger volume, peace
Dress difficulty is big, security risk is more, installation period is long；3) heat exchanger being arranged on net flue needs to increase boiler induced-draft fan
Power, the heat exchanger being arranged in slurries need to increase the power of circulating pump, and the promotion of air-introduced machine power is about circulation pump power
10 times of promotion, energy consumption is higher.
Therefore need to develop a kind of flue gas condensing system, solve existing treatment quantity is big, flue gas cool-down heat exchange amount is big,
Flue gas cool-down cold source is not easy the problems such as choosing, while also ensuring that the water balance of former desulphurization system is not destroyed.
Summary of the invention
The first object of the present invention is to provide for a kind of wet desulfurization flue gas condenser system with water balance function, solution
Certainly existing treatment quantity is big, flue gas cool-down heat exchange amount is big, flue gas cool-down cold source is not easy the problems such as choosing, while can guarantee original
The water balance of desulphurization system is not destroyed.
The second object of the present invention is to provide the flue gas condensing of the wet desulfurization flue gas condenser system with water balance function
Method is collected water using sprayed slurry heat-exchange system and water balance system and is not required to as the water that inventive desulfurization technique is consumed
Want or reduce additional moisturizing.
In order to realize the first purpose of aforementioned present invention, the technical solution of the present invention is as follows: a kind of with water balance function
Wet desulfurization flue gas condenser system, it is characterised in that: including sprayed slurry heat-exchange system, cooling water recirculation system and water balance
System,
The sprayed slurry heat-exchange system includes desulfuration absorbing tower, slurry circulating pump and is set to outside the desulfuration absorbing tower
The slurry heat exchanger of side, spraying layer and circulation in the desulfuration absorbing tower and positioned at the desulfuration absorbing tower top
Slurries pipeline；
The desulfuration absorbing tower bottom is equipped with absorption tower stock tank, is equipped with smoke inlet in the middle part of the desulfuration absorbing tower side wall,
The smoke inlet is set between the spraying layer and the absorption tower stock tank；Absorption tower stock tank lower part is described equipped with being passed through
The loop slurry pipeline of spraying layer, the loop slurry pipeline towards the spraying layer are equipped with the serum recycle
Pump；
The cooling water recirculation system includes the mechanical-draft cooling tower set on the slurry heat exchanger side, described in connection
The cooling water pipeline and cooling water circulating pump of mechanical-draft cooling tower and the slurry heat exchanger；
The water balance system include mist eliminator flushing pump, more medium filter, be set to the absorption tower stock tank with it is described
Rotational flow station between more medium filter, in the desulfuration absorbing tower and be located at the spraying layer top demister with
And mist eliminator flushing water lines；The spraying layer is between the demister and the smoke inlet 2；
Absorption tower stock tank lower part is equipped with the mist eliminator flushing water lines company for being passed through the demister, the demister punching
The mist eliminator flushing pump, rotational flow station, the more medium filter are successively arranged on wash water pipeline.
In the above-mentioned technical solutions, the spraying layer has multilayer, and the absorption tower stock tank is passed through the circulation of the spraying layer
Slurries pipeline has a plurality of；The slurry circulating pump is successively arranged on towards the loop slurry pipeline of spraying layer described in first layer
And slurry heat exchanger；The slurry heat exchanger is arranged in the pipeline of the serum recycle pump intake or is arranged in the slurries and follows
In the pipeline of ring pump discharge.
In the above-mentioned technical solutions, described towards being successively arranged on the loop slurry pipeline of spraying layer described in the second layer
Slurry circulating pump and slurry heat exchanger.
In the above-mentioned technical solutions, the more medium filter and rotational flow station lower end, which are equipped with, is passed through the desulfuration absorbing tower
Blowoff line.
In order to realize the second purpose of aforementioned present invention, the technical solution of the present invention is as follows: described has the function of water balance
Wet desulfurization flue gas condenser system flue gas condensing method, characterized by the following steps:
Step 1: after former flue gas enters desulfuration absorbing tower from smoke inlet, it is located at below first layer spraying layer
The slurries cooling that spraying layer sprays, fraction slurries evaporation make flue gas form saturation state；The absorption tower stock tank is followed by slurries
Ring pumps to spraying layer and provides slurries；
Step 2: circulatory mediator enters in slurry heat exchanger and slurry heat exchanger under the driving of cooling water circulating pump
Slurries exchange heat；Circulatory mediator temperature after heat exchange rises, enters in mechanical-draft cooling tower and is cooled, and restores initial
Temperature, then carry out by cooling water circulating pump the circulation of next heat exchange-cooling；Slurry temperature decline after heat exchange, passes through slurry
Liquid circulating pump is pumped into first layer spraying layer；
Step 3: the flue gas of saturation is sprayed when passing through first layer spraying layer by the slurries that cooling water recirculation system cools down
When pouring in saturated flue gas, the vapor in saturated flue gas is with small particle dust, SO3Colloidal solid condenses granulating as the nuclei of condensation
The biggish drop of diameter；
Step 4: drop a part of condensation directly drops down onto the stock tank of absorption tower, and another part is desulfurized in absorption tower
Demister is fallen into the stock tank of absorption tower after intercepting；
Step 5: the source using the slurries in the stock tank of absorption tower as mist eliminator flushing water is passed through in rotational flow station and carries out
It is separated by solid-liquid separation, the less overflow of solid content, which is passed into more medium filter, to be separated by solid-liquid separation, into more medium filter
For slurries by filtering, the rinse-system into demister is rinsed demister；The more underflow of solid content passes through sewage pipe
Road enters trench and returns to desulfuration absorbing tower；More medium filter sewerage enters trench by blowoff line and returns to desulfurization suction
Receive tower；Desulfurization fume exports at the top of desulfuration absorbing tower.
In the above-mentioned technical solutions, in step 2, circulatory mediator is at least one of demineralized water, water vapour.
The present invention has the advantage that
(1) present invention guarantees that the water balance of desulphurization system is unaffected through water balance system while reducing water consume,
So that it is guaranteed that the normal operation of desulphurization system；Solve that prior art treatment quantity is big, flue gas cool-down heat exchange amount is big, flue gas drop
Warm cold source is not easy the problems such as choosing；
(2) water that sprayed slurry heat-exchange system of the present invention and water balance system are collected can be used for offsetting the present invention as de-
The water that sulphur technique is consumed does not need or reduces additional moisturizing；Conventional wet sulfur removal technology is compared, present invention reduces absorption towers most
Whole exhaust gas temperature reduces the vapor with flue gas emission, saves water resource；
(3) conventional wet sulfur removal technology is compared, flue gas of the invention can utilize the small particle in flue gas in condensation process
Dust, SO3Colloidal solid is condensed into the biggish drop of partial size as the nuclei of condensation, to be conducive to be removed by demister, reaches reduction
Dust, SO3Effect.
Detailed description of the invention
Fig. 1 is schematic structural view of the invention.
Fig. 2 is that the present invention leads on the loop slurry pipeline of second layer spraying layer and is successively arranged slurry circulating pump and slurries change
The structural schematic diagram of hot device.
1- sprayed slurry heat-exchange system in figure, 1.1- desulfuration absorbing tower, the absorption tower 1.11- stock tank, 1.12- smoke inlet,
1.2- slurry circulating pump, 1.3- slurry heat exchanger, 1.4- spraying layer, 1.5- loop slurry pipeline, 2- cooling water recirculation system,
2.1- mechanical-draft cooling tower, 2.2- cooling water circulating pump, 2.3- cooling water pipeline, 3- water balance system, the punching of 3.1- demister
Wash pump, 3.2- rotational flow station, 3.3- more medium filter, 3.4- demister, 3.5- mist eliminator flushing water lines, 3.6- sewage pipe
Road.
Specific embodiment
The performance that the invention will now be described in detail with reference to the accompanying drawings, but they and do not constitute a limitation of the invention, only
It is for example.Keep advantages of the present invention more clear by explanation simultaneously and is readily appreciated that.
Refering to known to attached drawing: a kind of wet desulfurization flue gas condenser system with water balance function, including sprayed slurry are changed
Hot systems 1, cooling water recirculation system 2 and water balance system 3,
The sprayed slurry heat-exchange system 1 include desulfuration absorbing tower 1.1, slurry circulating pump 1.2 and be set to the desulfurization
The slurry heat exchanger 1.3 in 1.1 outside of absorption tower, is set in the desulfuration absorbing tower 1.1 and is located at the desulfuration absorbing tower 1.1
The spraying layer 1.4 and loop slurry pipeline 1.5 on top；
1.1 bottom of desulfuration absorbing tower is equipped with absorption tower stock tank 1.11, is equipped in the middle part of 1.1 side wall of desulfuration absorbing tower
Smoke inlet 1.12, the smoke inlet 1.12 are set between the spraying layer 1.4 and the absorption tower stock tank 1.11；The suction
It receives 1.11 lower part of tower stock tank and is equipped with the loop slurry pipeline 1.5 for being passed through the spraying layer 1.4, lead to the spraying layer 1.4
The loop slurry pipeline 1.5 be equipped with the slurry circulating pump 1.2；
The cooling water recirculation system 2 includes the mechanical-draft cooling tower 2.1 set on 1.3 side of slurry heat exchanger,
It is connected to the cooling water pipeline 2.3 and cooling water circulating pump of the mechanical-draft cooling tower 2.1 and the slurry heat exchanger 1.3
2.2；
The water balance system 3 includes mist eliminator flushing pump 3.1, and more medium filter 3.3 is set to the absorption tower stock tank
Rotational flow station 3.2 between 1.11 and the more medium filter 3.3 is set in the desulfuration absorbing tower 1.1 and is located at described
The demister 3.4 and mist eliminator flushing water lines 3.5 on 1.4 top of spraying layer；The spraying layer 1.4 is located at the demister
Between 3.4 and the smoke inlet 1.12；
1.11 lower part of absorption tower stock tank is equipped with the company of mist eliminator flushing water lines 3.5 for being passed through the demister 3.4, institute
It states and is successively arranged the mist eliminator flushing pump 3.1, rotational flow station 3.2, the more medium filter in mist eliminator flushing water lines 3.5
3.3, for the water balance for guaranteeing desulphurization system, rotational flow station is set and more medium filter is filtered the slurries in absorption tower,
The solid content for reducing slurries, uses filtered slurries as mist eliminator flushing water；Water balance system is to maintain desulfurization
New mist eliminator flushing pump is arranged in the water balance of system, and the source using the slurries in absorption tower as mist eliminator flushing water leads to
The cyclone for crossing the first order is separated by solid-liquid separation, and the less overflow of solid content enters in the more medium filter of the second level, is contained
Absorption tower is returned to admittedly measuring more underflow and entering trench；The slurries for entering the more medium filter of the second level pass through filtering,
It is cold since the flue gas of saturation has a large amount of water after the cooling period to overcome the prior art for the requirement that mist eliminator flushing water can be met
It is solidifying, the shortcomings that entering in desulphurization system, use process water that can be destroyed for the water balance of the system of mist eliminator flushing water.
The spraying layer 1.4 has multilayer, and the absorption tower stock tank 1.11 is passed through the recycle slurry liquid pipe of the spraying layer 1.4
Road 1.5 has a plurality of；The slurries are successively arranged on towards the loop slurry pipeline 1.5 of spraying layer 1.4 described in first layer to follow
Ring pump 1.2 and slurry heat exchanger 1.3；The slurry heat exchanger 1.3 be arranged in the pipeline of 1.2 entrance of slurry circulating pump or
It is arranged in the pipeline that the slurry circulating pump 1.2 exports (as shown in Figure 1)；Sprayed slurry heat-exchange system is in absorption tower spraying layer
Slurry heat exchanger is set on the loop slurry pipeline of top (i.e. first layer states spraying layer), the slurries being derived from absorption tower are being starched
It in liquid heat exchanger, is cooled down by recirculated cooling water, slurry heat exchanger is indirect type heat exchanger；According to the needs of project, cooling width
Degree is usually between 5~10 DEG C；Slurries after cooling enter spraying layer by loop slurry pipeline, spray into absorption tower with it is full
The flue gas of sum mixes, and the flue gas of saturation cools down condensation after encountering the lower slurries of temperature；Using in flue gas small particle dust,
SO3Colloidal solid is condensed into the biggish drop of partial size as the nuclei of condensation, reduces dust and SO in discharge flue gas3Content；Condensation
Drop part directly drop down onto the stock tank on absorption tower, the demister that another part is absorbed tower falls into the slurry on absorption tower after intercepting
Chi Zhong, this part water is recycled in desulphurization system, to reduce the water consume of desulphurization system；For the project of transformation, need
Increase the lift of circulating pump, to overcome slurry heat exchanger bring resistance.
The slurry circulating pump is successively arranged on towards the loop slurry pipeline 1.5 of spraying layer 1.4 described in the second layer
1.2 and slurry heat exchanger 1.3, as the spare of first layer spraying layer, the spraying layer of first layer is top layer's spraying layer, the second layer
Spraying layer is time upper layer spraying layer (as shown in Figure 2).
The mechanical-draft cooling tower 2.1 passes through with the mechanical-draft cooling tower 2.1 and the slurry heat exchanger 1.3
Cooling water pipeline 2.3, which is sequentially connected, is combined into cooling circuit, and cooling water recirculation system is preferable using demineralized water or other water quality
Water is as circulatory mediator, under the driving of cooling water circulating pump, enters slurry heat exchanger and is changed with the slurries in heat exchanger
Heat；Cooling water temperature after heat exchange rises, and is cooled then into mechanical-draft cooling tower, restores initial temperature, then
The circulation of next heat exchange-cooling is carried out by cooling water circulating pump.
The more medium filter 3.3 and 3.2 lower end of rotational flow station are equipped with the sewage pipe for being passed through the desulfuration absorbing tower 1.1
Road 3.6.
Refering to known to attached drawing: the flue gas condensing side of the wet desulfurization flue gas condenser system with water balance function
Method includes the following steps:
Step 1: after former flue gas enters desulfuration absorbing tower 1.1 from smoke inlet 1.12, it is located at first layer spraying layer
The slurries cooling that the spraying layer 1.4 of 1.4 lower sections sprays, fraction slurries evaporation make flue gas form saturation state；The absorption tower slurry
Pond 1.11 provides slurries to spraying layer 1.4 by slurry circulating pump 1.2；
Step 2: circulatory mediator enters slurry heat exchanger 1.3 and changes with slurries under the driving of cooling water circulating pump 2.2
Slurries in hot device 1.3 exchange heat；Circulatory mediator temperature rises, is cooled into mechanical-draft cooling tower 2.1 after heat exchange,
Restore initial temperature, then carries out the circulation of next heat exchange-cooling by cooling water circulating pump 2.2；Slurry temperature after heat exchange
Decline, is pumped into first layer spraying layer 1.4 by slurry circulating pump 1.2；First layer spraying layer 1.4 is the spraying layer of top layer；
Step 3: the flue gas of saturation is when passing through first layer spraying layer 1.4, the slurry that is cooled down by cooling water recirculation system 2
When liquid spray is into saturated flue gas, the vapor in saturated flue gas is with small particle dust, SO3Colloidal solid is condensed as the nuclei of condensation
At the biggish drop of partial size, dust and SO in discharge flue gas are reduced3Content；
Step 4: drop a part of condensation directly drops down onto absorption tower stock tank 1.11, and another part is desulfurized absorption tower
Demister 3.4 in 1.1 is fallen into absorption tower stock tank 1.11 after intercepting, this part water is recycled in desulphurization system, to drop
The low water consume of desulphurization system；
Step 5: the source using the slurries in absorption tower stock tank 1.11 as 3.4 flushing water of demister is passed through rotational flow station
It is separated by solid-liquid separation in 3.2, the less overflow of solid content, which is passed into more medium filter 3.3, to be separated by solid-liquid separation, into more
For the slurries of medium filter 3.3 by filtering, the rinse-system into demister 3.4 is rinsed demister；Solid content compared with
More underflows enters trench by blowoff line 3.6 and returns to desulfuration absorbing tower 1.1；More medium filter sewerage passes through blowdown
Pipeline 3.6 enters trench and returns to desulfuration absorbing tower 1.1, and rotational flow station 3.2 carries out first order filtering, more medium filter to slurries
3.3 pairs of slurries carry out second level filtering, and drainage was made to meet the requirement of mist eliminator flushing water.
In step 2, circulatory mediator is at least one of demineralized water, water vapour, and circulatory mediator is that water quality is preferable
Water.
Embodiment
Now apply the present invention to 300,000 kilowatts certain Thermal generation unit, work one hour, sprays through the invention
Slurries heat-exchange system and water balance system collect about 30 tons of water, can be used for making the water that inventive desulfurization technique is consumed, do not need or
Reduce additional moisturizing.
And the prior art is used, 300,000 kilowatts certain Thermal generation unit works one hour and expends about 30 tons of water, Zhi Nengyi
It is consumed by flat its technique that meets of moisturizing.
Other unaccounted parts belong to the prior art.
Claims (6)
1. a kind of wet desulfurization flue gas condenser system with water balance function, it is characterised in that: exchanging heat including sprayed slurry is
It unites (1), cooling water recirculation system (2) and water balance system (3), the sprayed slurry heat-exchange system (1) include that desulfurization absorbs
Tower (1.1), slurry circulating pump (1.2) and the slurry heat exchanger (1.3) being set on the outside of the desulfuration absorbing tower (1.1), are set to
Spraying layer (1.4) and recycle slurry liquid pipe in the desulfuration absorbing tower (1.1) and positioned at the desulfuration absorbing tower (1.1) top
Road (1.5)；
Desulfuration absorbing tower (1.1) bottom is equipped with absorption tower stock tank (1.11), sets in the middle part of desulfuration absorbing tower (1.1) side wall
Have smoke inlet (1.12), the smoke inlet (1.12) is set to the spraying layer (1.4) and the absorption tower stock tank (1.11)
Between；Absorption tower stock tank (1.11) lower part is equipped with the loop slurry pipeline (1.5) for being passed through the spraying layer (1.4),
The loop slurry pipeline (1.5) towards the spraying layer (1.4) is equipped with the slurry circulating pump (1.2)；
The cooling water recirculation system (2) includes the mechanical-draft cooling tower set on the slurry heat exchanger (1.3) side
(2.1), it is connected to the cooling water pipeline (2.3) of the mechanical-draft cooling tower (2.1) and the slurry heat exchanger (1.3) and cold
But water-circulating pump (2.2)；
The water balance system (3) includes mist eliminator flushing pump (3.1), and more medium filter (3.3) is set to the absorption tower and starches
Rotational flow station (3.2) between pond (1.11) and the more medium filter (3.3), be set to the desulfuration absorbing tower (1.1) in and
Demister (3.4) and mist eliminator flushing water lines (3.5) positioned at the spraying layer (1.4) top；The spraying layer (1.4)
Between the demister (3.4) and the smoke inlet (1.12)；
Absorption tower stock tank (1.11) lower part connects equipped with the mist eliminator flushing water lines (3.5) for being passed through the demister (3.4),
The mist eliminator flushing pump (3.1), rotational flow station (3.2), more Jie are successively arranged on the mist eliminator flushing water lines (3.5)
Mass filter (3.3).
2. a kind of wet desulfurization flue gas condenser system with water balance function according to claim 1, it is characterised in that:
The spraying layer (1.4) has multilayer, and the absorption tower stock tank (1.11) is passed through the loop slurry pipeline of the spraying layer (1.4)
(1.5) have a plurality of；The slurry is successively arranged on towards the loop slurry pipeline (1.5) of spraying layer described in first layer (1.4)
Liquid circulating pump (1.2) and slurry heat exchanger (1.3)；The slurry heat exchanger (1.3) is arranged in the slurry circulating pump (1.2) and enters
In the pipeline of mouth or it is arranged in the pipeline of the slurry circulating pump (1.2) outlet.
3. a kind of wet desulfurization flue gas condenser system with water balance function according to claim 1 or 2, feature exist
In: lead on the loop slurry pipeline (1.5) of spraying layer (1.4) described in the second layer and is successively arranged the slurry circulating pump
(1.2) and slurry heat exchanger (1.3).
4. a kind of wet desulfurization flue gas condenser system with water balance function according to claim 3, it is characterised in that:
The more medium filter (3.3) and rotational flow station (3.2) lower end are equipped with the blowoff line for being passed through the desulfuration absorbing tower (1.1)
(3.6)。
5. according to claim 1 in -4 described in any claim with the wet desulfurization flue gas condenser system of water balance function
Flue gas condensing method, characterized by the following steps:
Step 1: after former flue gas enters desulfuration absorbing tower (1.1) from smoke inlet (1.12), it is located at first layer spraying layer
(1.4) the slurries cooling that the spraying layer (1.4) below sprays, fraction slurries evaporation make flue gas form saturation state；The absorption
Tower stock tank (1.11) provides slurries to spraying layer (1.4) by slurry circulating pump (1.2)；
Step 2: circulatory mediator exchanges heat under the driving of cooling water circulating pump (2.2) into slurry heat exchanger (1.3) and slurries
Slurries in device (1.3) exchange heat；Circulatory mediator temperature after heat exchange rises, into quilt in mechanical-draft cooling tower (2.1)
It is cooling, restore initial temperature, then the circulation of next heat exchange-cooling is carried out by cooling water circulating pump (2.2)；Slurry after heat exchange
The decline of liquid temperature, is pumped into first layer spraying layer (1.4) by slurry circulating pump (1.2)；
Step 3: the flue gas of saturation passes through the slurry of cooling water recirculation system (2) cooling when passing through first layer spraying layer (1.4)
When liquid spray is into saturated flue gas, the vapor in saturated flue gas is with small particle dust, SO3Colloidal solid is condensed as the nuclei of condensation
At the biggish drop of partial size；
Step 4: drop a part of condensation directly drops down onto absorption tower stock tank (1.11), and another part is desulfurized absorption tower
(1.1) demister (3.4) in is fallen into absorption tower stock tank (1.11) after intercepting；
Step 5: the source using the slurries in absorption tower stock tank (1.11) as demister (3.4) flushing water is passed through rotational flow station
(3.2) it being separated by solid-liquid separation in, the less overflow of solid content is passed into more medium filter (3.3) and is separated by solid-liquid separation, into
Enter the slurries of more medium filter (3.3) by filtering, the rinse-system into demister (3.4) is rinsed demister；
The more underflow of solid content enters trench by blowoff line (3.6) and returns to desulfuration absorbing tower (1.1)；More medium filter row
Sewage enters trench by blowoff line (3.6) and returns to desulfuration absorbing tower (1.1)；Desulfurization fume is from desulfuration absorbing tower (1.1)
Top output.
6. the flue gas condensing method of the wet desulfurization flue gas condenser system according to claim 5 with water balance function,
It is characterized by: circulatory mediator is at least one of demineralized water, water vapour in step 2.
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| CN111185072A (en) * | 2020-03-12 | 2020-05-22 | 北京中航天业科技有限公司 | Flue gas desulfurization device and flue gas desulfurization method |
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