CN104740992B - A kind of carbide slag gypsum flue gas deep desulfuration dust arrester and method - Google Patents
A kind of carbide slag gypsum flue gas deep desulfuration dust arrester and method Download PDFInfo
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Abstract
The invention discloses a kind of carbide slag gypsum flue gas deep desulfuration dust arrester and method, including desulfurizing tower, wet-esp demister, sedimentation basin, dewatering system and serum producing system, using two-step desulfurization tower and wet-esp demister cascaded structure, compared with traditional double tower double circulation desulphurization technique, desulfuration efficiency is up to more than 99%, simultaneously effective reduce taking up room for desulfurizing tower, the present invention is with carbide slag as desulfurizing agent, the treatment of wastes with processes of wastes against one another, environment benefits and economic gains are notable, two-stage cyclone classification slurrying is used simultaneously, the slurries of different size are produced respectively, while desulfurizing tower absorption efficiency is ensured, desulfurizing tower inner stuffing layer is effectively prevented to block, with reference to wet-esp demister, further improve efficiency of dust collection, especially PM2.5, the dust zero discharges such as PM2.5 can almost be realized.
Description
Technical field
The invention belongs to flue gas desulfurization and dedusting field, and in particular to a kind of flue gas deep desulfuration with carbide slag as desulfurizing agent
Dust arrester and method.
Background technology
Carbide slag slurry main active is Ca (OH)2, carbide slag solution useful application is used in desulfuration absorbing tower
Absorb the SO in flue gas2, it is general in 95% or so, slightly above conventional lime using carbide slag/lime-gypsum method desulfuration efficiency
Stone-gypsum, therefore application is more and more extensive.But due to Ca (OH)2Water is slightly soluble in, exist a disadvantage, more than
Determine the easy occluding device pipeline of carbide slag solution of concentration.
For example, notification number discloses the wet method that a kind of carbide slag is pre-processed for the Chinese invention patent of the B of CN 101642674
Flue gas desulfurization technique, wet desulphurization treatment is carried out using carbide slag slurry as desulfurizing agent to flue gas, is added in carbide slag slurry
Catalyst, and blast air and carry out oxidation reaction, the carbide slag slurry after oxidation reaction is re-used as desulfurizing agent and carries out flue gas wet method
Desulfurization process.A kind of application publication number carbide slag pretreatment for the Chinese invention patent document of the A of CN 101816891 is disclosed
Ozonation and wet-method flue gas desulphurization process, wet desulphurization is carried out using carbide slag as desulfurizing agent to flue gas, in carbide slag slugging process
In be passed through the gaseous mixture of ozone and oxygen, carry out oxidation reaction, the carbide slag slurry after oxidation carries out flue gas and takes off as desulfurizing agent
Sulphur.Both the above technique is all that, using primary cycle absorption tower, absorption efficiency is difficult to meet the requirement of current minimum discharge standard,
And can not be using concentration carbide slag solution higher.
The Chinese invention patent document of Publication No. CN 102921287A discloses a kind of double tower Two-way Cycle limestone wet-process
Desulfurizer and method, its device include gas cleaning part, absorbent supply section, slurries oxidizing and crystallizing part and calcium plaster
Fluid dewatering part；The patent carries out desulfurization by double tower Two-way Cycle using lime stone, and desulfuration efficiency is improved, but discharge
Flue gas there is the dust such as PM2.5 higher, it is difficult to ensure current environmental protection discharge standard.
The content of the invention
Present invention solves the technical problem that being：For existing acetylene sludge-gypsum process desulphurization exist desulfuration efficiency it is not high and
A kind of fume emission defect not up to standard, there is provided flue gas deep desulfuration dust arrester and method with carbide slag as desulfurizing agent, has
SO in effect ground removing flue gas2、SO3, PM2.5 etc., the purpose of deep purifying is realized in terms of flue gas desulfurization and dedusting two.
The present invention adopts the following technical scheme that realization：A kind of acetylene sludge-gypsum process flue gas deep desulfuration dust arrester, bag
Include：
Desulfurizing tower, the desulfurizing tower is the spray column and packed tower connected by the first flue 9, wherein first grade desulfurizing tower 2
It is spray column, two-grade desulfurizing tower 13 is packed tower, and flue gas is sent into from the smoke inlet of first grade desulfurizing tower 2；
Wet-esp demister 29, is connected, the dedusting with the exhanst gas outlet of two-grade desulfurizing tower 13 by the second flue 23
Wet EFI drenching layer 26 inside demister is connected with clean solution tank 32 by the wet pipeline of electric circulating pump 31；
Sedimentation basin 20, the two-grade desulfurizing slurry pool 15 with the bottom of two-grade desulfurizing tower 13 is connected, and the upper strata of the sedimentation basin 20 is clear
Liquid is connected with clean solution tank 32, the bottom of the sedimentation basin 20 and clean solution tank 32 respectively with the first grade desulfurizing of the bottom of first grade desulfurizing tower 2
Slurry pool 8 is connected；
Dewatering system, is connected with the bottom of first grade desulfurizing slurry pool 8 by pipeline, connection in the first grade desulfurizing slurry pool 8
There is oxidation air 7, will be deposited in after the slurries of bottom of pond are oxidized to gypsum slurries and send into dewatering system.
Further, 2-5 layers of spraying layer is provided with inside the first grade desulfurizing tower 2, spraying layer and bottom of towe in the desulfurizing tower
Desulfurization slurry pond connected by desulphurization circulating pump conduit.
Further, 1-3 layers of packing layer is provided with inside the two-grade desulfurizing tower 13, form of bio-carrier uses random packing or rule
Whole filler, each packing layer is correspondingly provided with one layer of spraying layer, and the spraying layer in the desulfurizing tower passes through with the desulfurization slurry pond of bottom of towe
Desulphurization circulating pump conduit is connected.
Further, it is equipped with desulfurization agitator in the first grade desulfurizing slurry pool 8 and two-grade desulfurizing slurry pool 15.
Further, the dewatering system includes dewatering cyclone 38 and vacuum belt filter 39, the dewatering cyclone 38
Connected with the bottom of first grade desulfurizing slurry pool 8, wherein, the underflow opening of dewatering cyclone is connected with vacuum belt filter 39, and top head piece connects
Pass to effluent treatment plant, the gypsum filter cake outward transport of vacuum belt filter production, filtrate recycle.
Acetylene sludge-gypsum process flue gas deep desulfuration dust arrester in the present invention, also including to the He of first grade desulfurizing slurry pool 8
Two-grade desulfurizing slurry pool 15 conveys the serum producing system of carbide slag slurry.
Further, the serum producing system includes carbide slag slurries liquid pool 33, deckered stock chest 37 and thin pulp pond 36；The electricity
Rock ballast slurry pool 33 is connected two-stage cyclones by pump with pipeline, wherein the top head piece of one-level cyclone 34 and second cyclone 35
Connection, the underflow opening of one-level cyclone 34 is connected with deckered stock chest 37, and the top head piece of second cyclone 35 is connected with thin pulp pond 36, and two
The underflow opening of level cyclone 35 is connected with the circulation of carbide slag slurries liquid pool 33；Thin pulp pond 36 is by pump and pipeline and two-grade desulfurizing slurries
Pond 15 connects；Deckered stock chest 37 is connected by pump and pipeline with first grade desulfurizing slurry pool 8.
Further, the epimere of the sedimentation basin 20 is provided with curb 18 and overfall 21；One end of the curb 18 and two
Level desulfurization slurry pond 15 is connected, and the other end is connected with the vertical conduit 19 in sedimentation basin, and the overfall 21 connects with clean solution tank 32
It is logical.
The invention also discloses a kind of acetylene sludge-gypsum process flue gas deep desulfuration dust collection method, using above-mentioned deep desulfuration
Dust arrester, specifically includes following steps：
Step 1：Temperature is sent into first grade desulfurizing tower 2 in 130-170 DEG C of former flue gas, inside flue gas and first grade desulfurizing tower
Carbide slag slurry A contacts under spraying layer circulated sprinkling, the Ca (OH) in carbide slag slurry A2With SO in flue gas2Reaction generation is sub-
Calcium sulfate, air is blasted by the oxidation air 7 in first grade desulfurizing slurry pool 8, and reacted calcium sulfite slurries are forced into oxygen
Chemical conversion gypsum slurries are simultaneously deposited in the bottom of first grade desulfurizing slurry pool 8；
Step 2：Flue gas after being purified through first grade desulfurizing tower 2 enters two-grade desulfurizing tower 13 by flue, and flue gas enters two grades and takes off
Contacted with the carbide slag slurry B under the spraying layer circulated sprinkling in two-grade desulfurizing tower while packing layer 12 in sulphur tower, flue gas
In remaining SO2Further with carbide slag slurry B in Ca (OH)2Reaction generation calcium sulfite, calcium sulfite slurries pass through two grades
Desulfurization slurry pond 15 enters the layering of the bottom precipitation of sedimentation basin 20, and bottom solid content enters in the calcium sulfite serum recycle of 30-50%
Enter in first grade desulfurizing slurry pool 8, same to force oxidation generation gypsum slurries, the upper clear supernate overflow of sedimentation basin 20 enters clean solution tank 32
In；
Step 3：Flue gas after being purified through two-grade desulfurizing tower 13 enters wet-esp demister 29, flue gas warp by flue 23
After the purification of two-step desulfurization tower, containing more water smoke and PM2.5, the anode of wet-esp demister 29 is entered after flue gas dispersion
Between plate 28, under the corona of negative electrode awns line 27 effect on periphery, water smoke and PM2.5 in flue gas are adhered to by chargedization and moving
On positive plate 28, the spray liquid of the wet EFI drenching layer 26 in wet-esp demister will adsorb water smoke on positive plate 28 and
PM2.5 is washed away into clean solution tank 32, and the clean flue gas for removing water smoke and PM2.5 is arranged by the exhanst gas outlet of wet-esp demister
Go out, complete the desulfurization and dedusting discharge of flue gas, the clear liquid in clean solution tank 32 is flowed into first grade desulfurizing slurry pool 8, keeps first grade desulfurizing
Water balance inside slurry pool 8.
Step 4：After forcing the gypsum slurries after oxidation to be classified through dewatering cyclone 38 in first grade desulfurizing slurry pool 8, will starch
Liquid concentration is further dehydrated in the bottom slurry feeding vacuum belt filter 39 of 40-55%, and ultimately forms moisture content less than 10%
Gypsum filter cake, the top of dewatering cyclone 38 stream concentration sends to Waste Water Treatment less than 4% slurries.
Further, the carbide slag slurry A and carbide slag in the first grade desulfurizing slurry pool 8 and two-grade desulfurizing slurry pool 15
Serum producing systems of the slurries B as described in claim 6 or 7 is provided, and is comprised the following steps that：
During carbide slag solid is by manually or mechanically adding carbide slag slurries liquid pool 33, process water dilution is configured to concentration in 15-
25% carbide slag slurry, after being classified through one-level cyclone 34, underflow enters deckered stock chest 37, and is mixedly configured into a small amount of process water
Carbide slag slurry A of the concentration in 20-30%, pH value between 5-6, through pump and pipeline to first grade desulfurizing tower slurry pool 8；One
Level cyclone 34 top stream slurries enter second cyclone 35 and are further classified, and the bottom slurry of second cyclone 35 returns carbide slag slurry
Pond 33, the top of second cyclone 35 stream slurries go to thin pulp pond 36, and process water is diluted to electricity of the concentration in 2-6%, pH value between 7-8
Rock ballast slurries B, by pump and pipeline to two-grade desulfurizing slurry pool 15.
The present invention is had the advantages that using above-mentioned technical proposal：
(1) with carbide slag as desulfurizing agent, the treatment of wastes with processes of wastes against one another, environment benefits and economic gains are notable.
(2) using two-step desulfurization tower and wet-esp demister cascaded structure, with traditional double tower double circulation desulphurization technique
Compare, desulfuration efficiency simultaneously effective reduces taking up room for desulfurizing tower up to more than 99%.
(3) two-stage cyclone classification slurrying is used, the slurries of different size is produced respectively, particle diameter is larger, the more electricity of impurity
Rock ballast slurries are used for one-level spray desulfurizing tower, and particle is small, and quality carbide slag slurry high is used for two grades of filler desulfurizing towers, are ensureing
While two-grade desulfurizing tower absorption efficiency, it is effectively prevented from desulfurizing tower inner stuffing layer and blocks.
(4) wet-esp mist eliminator flushing water is the clear liquid after desulfurization slurry precipitation, and ion concentration is higher, is conducive to water
Mist and dust charge electrification, further result in that efficiency of dust collection is high, and especially PM2.5, can almost realize the dust zero-emission such as PM2.5
Put.
Brief description of the drawings
Fig. 1 is a kind of structural representation of carbide slag of the invention-gypsum flue gas deep desulfuration dust arrester.
Label declaration in figure：
1-first grade desulfurizing smoke inlet 2-first grade desulfurizing tower 3-first grade desulfurizing tower spraying layer
4-first grade desulfurizing exhanst gas outlet 5-first grade desulfurizing circulating pump 6-first grade desulfurizing agitator
7-oxidation air, 8-first grade desulfurizing the 9-the first flue of slurry pool
10-two-grade desulfurizing smoke inlet 11-two-grade desulfurizing, 12-packing layer of spraying layer
13-two-grade desulfurizing tower 14-two-grade desulfurizing exhanst gas outlet 15-two-grade desulfurizing slurry pool
16-two-grade desulfurizing agitator 17-two-grade desulfurizing, 18-curb of circulating pump
19-vertical conduit 20-sedimentation basin, 21-overfall
The flue of 22-serum outlet 23-the second 24-wet electric smoke inlet
25-wet electric exhanst gas outlet 26-wet EFI drenching layer 27-negative electrode awns line
28-positive plate, 29-wet-esp demister 30-flue gas even distribution device
31-wet electric 32-clean solution tank of circulating pump, 33-carbide slag slurries liquid pool
34-one-level cyclone 35-second cyclone, 36-thin pulp pond
37-deckered stock chest, 38-dewatering cyclone, 39-vacuum belt filter
Specific embodiment
As shown in figure 1, a kind of acetylene sludge-gypsum process flue gas deep desulfuration dust arrester includes, first grade desulfurizing is specifically included
Tower 2, two-grade desulfurizing tower 13, wet-esp demister 29, sedimentation basin 20, serum producing system and dewatering system.
Desulfurizing tower, the desulfurizing tower is the spray column and packed tower connected by the first flue 9, wherein first grade desulfurizing tower 2
It is spray column, two-grade desulfurizing tower 13 is packed tower, and flue gas is sent into from the smoke inlet of first grade desulfurizing tower 2；Wet-esp demisting
Device 29, is connected, the wet EFI drenching layer inside the dedusting demister with the exhanst gas outlet of two-grade desulfurizing tower 13 by the second flue 23
26 are connected with clean solution tank 32 by the wet pipeline of electric circulating pump 31；Sedimentation basin 20, the two-grade desulfurizing with the bottom of two-grade desulfurizing tower 13 is starched
Liquid pool 15 is connected, and the supernatant liquor of the sedimentation basin 20 is connected with clean solution tank 32, the bottom point of the sedimentation basin 20 and clean solution tank 32
First grade desulfurizing slurry pool 8 not with the bottom of first grade desulfurizing tower 2 is connected；Dewatering system, with the bottom of first grade desulfurizing slurry pool 8 by pipe
Road is connected, and oxidation air 7 is connected with the first grade desulfurizing slurry pool 8, and the slurries that will be deposited in bottom of pond are oxidized to gypsum slurries
After send into dewatering system.
The inside hypomere of first grade desulfurizing tower 2 has first grade desulfurizing slurry pool 8, and epimere has first grade desulfurizing spraying layer 3, and one-level is arranged at top
Desulfurization fume outlet 4, middle part is provided with first grade desulfurizing smoke inlet 1；First grade desulfurizing spraying layer 3 passes through with first grade desulfurizing slurry pool 8
First grade desulfurizing circulating pump 5 and pipeline are connected.There are oxidation air 7 and first grade desulfurizing agitator 6, one in first grade desulfurizing slurry pool
Level desulfurizing tower exhanst gas outlet 4 is connected by the first flue 9 with two-grade desulfurizing tower 13.2-5 layers of spray is provided with inside first grade desulfurizing tower 2
Drenching layer.
The inside hypomere of two-grade desulfurizing tower 13 has two-grade desulfurizing slurry pool 15, and epimere has two-grade desulfurizing spraying layer 11 and packing layer
12, two-grade desulfurizing spraying layer 11 is located above packing layer 12；Two-grade desulfurizing smoke inlet 10, two-grade desulfurizing spraying layer 11 are arranged at top
Realize connecting by two-grade desulfurizing circulating pump 17 and pipeline with two-grade desulfurizing slurry pool 15, be provided with two-grade desulfurizing slurry pool 15
Two-grade desulfurizing agitator 16.There are two-grade desulfurizing tower flue gas to export 14 between two-grade desulfurizing tower slurry pool 15 and lower floor's packing layer 12,
Connected with wet-esp demister 28 by the second flue 23.1-3 layers of packing layer is provided with inside two-grade desulfurizing tower 13, each is filled out
The bed of material is correspondingly provided with one layer of spraying layer, and filler can be random packing or structured packing, such as cascade ring, Raschig ring etc., it is also possible to
It is perforated plate corrugated filler, metal hexagon grid, metal triangular type positive wave structured packing.
Two-grade desulfurizing tower slurry pool 15 is connected with sedimentation basin 20, the epimere of sedimentation basin 20 have curb 18 and overfall 21,
There is vertical slurry conduit 19 centre；Curb 18 is connected with two-grade desulfurizing slurry pool 15, and overfall 21 is connected with clean solution tank 32
It is logical；The bottom of sedimentation basin 20 is provided with serum outlet 22, and serum outlet 22 is connected with first grade desulfurizing slurry pool 8.
The bottom of wet-esp demister 29 is provided with clean solution tank 32, wet electric smoke inlet 24 and flue gas even distribution device 30, middle part
There are some vertical parallel positive plates 28, there is negative electrode awns line 27 between positive plate 28, positive plate 28 and the top of negative electrode awns line 27 set
There is wet EFI drenching layer 26, wet EFI drenching layer 26 passes through wet electric circulating pump 31 and pipeline communication with clean solution tank 32.Wet-esp
The top of demister 29 is provided with wet electric exhanst gas outlet 25, and thus neat stress discharges.Clean solution tank 32 is connected with first grade desulfurizing tower slurry pool 8
It is logical.
First grade desulfurizing slurry pool 8 and two-grade desulfurizing tower slurry pool 15 provide carbide slag slurry, slurries by serum producing system
Preparation system includes carbide slag slurries liquid pool 33, thin pulp pond 36, deckered stock chest 37, one-level cyclone 34 and second cyclone 35, calcium carbide
Slurry liquid pool 33 is connected by pump with pipeline with one-level cyclone, and the top of one-level cyclone 34 head piece is connected with second cyclone 35
Logical, the underflow opening of one-level cyclone 34 is connected with deckered stock chest 37, and the top of second cyclone 35 head piece is connected with thin pulp pond 36, underflow
Mouth is connected with carbide slag slurries liquid pool 33.Thin pulp pond 36 is connected by pump and pipeline with two-grade desulfurizing slurry pool 15, deckered stock chest
37 are connected by pump and pipeline with first grade desulfurizing slurry pool 8.
The all absorption SO of whole desulfurizer2Calcium sulfite slurries be pooled to first grade desulfurizing slurry pool, force to be oxidized to
Send into dewatering system after gypsum slurries, dewatering system includes dewatering cyclone 38 and vacuum belt filter 39, dewatering cyclone 38 with
First grade desulfurizing slurry pool 8 is connected, and the underflow opening of dewatering cyclone 38 is connected with plaster splint filter 39, and top head piece removes wastewater treatment car
Between.The gypsum outward transport that vacuum belt filter 39 is produced, filtrate recycle.
The acetylene sludge-gypsum process flue gas depth for applying above-mentioned acetylene sludge-gypsum process flue gas deep desulfuration dust arrester takes off
Sulphur dust collection method, its step is as follows：
Step 1：Temperature is sent into first grade desulfurizing tower 2 in 130-170 DEG C of former flue gas, inside flue gas and first grade desulfurizing tower
Carbide slag slurry A contacts under spraying layer circulated sprinkling, the Ca (OH) in carbide slag slurry A2With SO in flue gas2Reaction generation is sub-
Calcium sulfate, air is blasted by the oxidation air 7 in first grade desulfurizing slurry pool 8, and reacted calcium sulfite slurries are forced into oxygen
Chemical conversion gypsum slurries are simultaneously deposited in the bottom of first grade desulfurizing slurry pool 8；
Step 2：Flue gas after being purified through first grade desulfurizing tower 2 enters two-grade desulfurizing tower 13 by flue, and flue gas enters two grades and takes off
Contacted with the carbide slag slurry B under the spraying layer circulated sprinkling in two-grade desulfurizing tower while packing layer 12 in sulphur tower, flue gas
In remaining SO2Further with carbide slag slurry B in Ca (OH)2Reaction generation calcium sulfite, calcium sulfite slurries pass through two grades
Desulfurization slurry pond 15 enters the layering of the bottom precipitation of sedimentation basin 20, and bottom solid content enters in the calcium sulfite serum recycle of 30-50%
Enter in first grade desulfurizing slurry pool 8, same to force oxidation generation gypsum slurries, the upper clear supernate overflow of sedimentation basin 20 enters clean solution tank 32
In；
Step 3：Flue gas after being purified through two-grade desulfurizing tower 13 enters wet-esp demister 29, flue gas warp by flue 23
After the purification of two-step desulfurization tower, containing more water smoke and PM2.5, the anode of wet-esp demister 29 is entered after flue gas dispersion
Between plate 28, under the corona of negative electrode awns line 27 effect on periphery, water smoke and PM2.5 in flue gas are adhered to by chargedization and moving
On positive plate 28, the spray liquid of the wet EFI drenching layer 26 in wet-esp demister will adsorb water smoke on positive plate 28 and
PM2.5 is washed away into clean solution tank 32, and the clean flue gas for removing water smoke and PM2.5 is arranged by the exhanst gas outlet of wet-esp demister
Go out, complete the desulfurization and dedusting discharge of flue gas, the clear liquid in clean solution tank 32 is flowed into first grade desulfurizing slurry pool 8, keeps first grade desulfurizing
Water balance inside slurry pool 8.
Step 4：After forcing the gypsum slurries after oxidation to be classified through dewatering cyclone 38 in first grade desulfurizing slurry pool 8, will starch
Liquid concentration is further dehydrated in the bottom slurry feeding vacuum belt filter 39 of 40-55%, and ultimately forms moisture content less than 10%
Gypsum filter cake, the top of dewatering cyclone 38 stream concentration sends to Waste Water Treatment less than 4% slurries.
During above-mentioned acetylene sludge-gypsum process desulphurization treatment flue gas, first grade desulfurizing slurry pool 8 and two-grade desulfurizing slurries
Carbide slag slurry A and carbide slag slurry B in pond 15 are provided by serum producing system, are comprised the following steps that：
During carbide slag solid is by manually or mechanically adding carbide slag slurries liquid pool 33, process water dilution is configured to concentration in 15-
25% carbide slag slurry, after being classified through one-level cyclone 34, underflow enters deckered stock chest 37, and is mixedly configured into a small amount of process water
Carbide slag slurry A of the concentration in 20-30%, pH value between 5-6, through pump and pipeline to first grade desulfurizing tower slurry pool 8；One
Level cyclone 34 top stream slurries enter second cyclone 35 and are further classified, and the bottom slurry of second cyclone 35 returns carbide slag slurry
Pond 33, the top of second cyclone 35 stream slurries go to thin pulp pond 36, and process water is diluted to electricity of the concentration in 2-6%, pH value between 7-8
Rock ballast slurries B, by pump and pipeline to two-grade desulfurizing slurry pool 15.
Following examples are completed using said apparatus and method.
Embodiment 1
From the coal-fired flue-gas after boiler bag-type dust, exhaust gas volumn 500200m3/ h, first grade desulfurizing smoke inlet titanium dioxide
Sulphur concentration 3000mg/Nm3, dust concentration 192mg/m3, 135 DEG C of flue-gas temperature.Removed through acetylene sludge-gypsum process flue gas deep desulfuration
After dirt device, wet electric exhanst gas outlet sulfur dioxide concentration 14mg/Nm3, desulfuration efficiency is up to 99.5%, dust concentration 8mg/Nm3,
PM2.5 is less than 15ug/Nm3, 46 DEG C of flue-gas temperature.
Embodiment 2
From the coal-fired flue-gas after boiler bag-type dust, exhaust gas volumn 270100m3/ h, first grade desulfurizing smoke inlet titanium dioxide
Sulphur concentration 2670mg/Nm3, dust concentration 174mg/m3, 130 DEG C of flue-gas temperature.Removed through acetylene sludge-gypsum process flue gas deep desulfuration
After dirt device, wet electric exhanst gas outlet sulfur dioxide concentration 12mg/Nm3, up to 99.5%, flue dust is not detected desulfuration efficiency, and PM2.5 is low
In 15ug/Nm3, 44 DEG C of flue-gas temperature.
Embodiment 3
From the coal-fired flue-gas after boiler bag-type dust, exhaust gas volumn 441253m3/ h, first grade desulfurizing smoke inlet titanium dioxide
Sulphur concentration 3640mg/Nm3, dust concentration 192mg/m3, 140 DEG C of flue-gas temperature.Removed through acetylene sludge-gypsum process flue gas deep desulfuration
After dirt device, wet electric exhanst gas outlet sulfur dioxide concentration 15mg/Nm3, desulfuration efficiency is up to 99.5%, flue dust 7mg/Nm3, PM2.5 is low
In 15ug/Nm3, 52 DEG C of flue-gas temperature.
Preferable implementation example of the invention is these are only, is not intended to limit the invention, it is all in spirit of the invention and principle
Within, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (2)
1. a kind of acetylene sludge-gypsum process flue gas deep desulfuration dust collection method, it is characterised in that use following device, the device bag
Include：
Desulfurizing tower, the desulfurizing tower is the spray column and packed tower connected by the first flue (9), wherein first grade desulfurizing tower (2)
It is spray column, two-grade desulfurizing tower (13) is packed tower, and flue gas is sent into from the smoke inlet of first grade desulfurizing tower (2)；
Wet-esp demister (29), is connected with the exhanst gas outlet of two-grade desulfurizing tower (13) by the second flue (23), and this is removed
Wet EFI drenching layer (26) inside dirt demister is connected with clean solution tank (32) by wet electric circulating pump (31) pipeline；
Sedimentation basin (20), the two-grade desulfurizing slurry pool (15) with two-grade desulfurizing tower (13) bottom is connected, on the sedimentation basin (20)
Layer clear liquid is connected with clean solution tank (32), the bottom of the sedimentation basin (20) and clean solution tank (32) respectively with first grade desulfurizing tower (2) bottom
First grade desulfurizing slurry pool (8) connection in portion；
Dewatering system, is connected with first grade desulfurizing slurry pool (8) bottom by pipeline, connection in the first grade desulfurizing slurry pool (8)
There is oxidation air (7), will be deposited in after the slurries of bottom of pond are oxidized to gypsum slurries and send into dewatering system；
Specifically include following steps：
Step (1)：Temperature is sent into first grade desulfurizing tower (2) in 130-170 DEG C of former flue gas, inside flue gas and first grade desulfurizing tower
Carbide slag slurry A contacts under spraying layer circulated sprinkling, the Ca (OH) in carbide slag slurry A2With SO in flue gas2Reaction generation is sub-
Calcium sulfate, air is blasted by the oxidation air (7) in first grade desulfurizing slurry pool (8), and reacted calcium sulfite slurries are strong
Oxygenerating is into gypsum slurries and is deposited in first grade desulfurizing slurry pool (8) bottom；
Step (2)：Flue gas after being purified through first grade desulfurizing tower (2) enters two-grade desulfurizing tower (13) by flue, and flue gas enters two grades
Contacted with the carbide slag slurry B under the spraying layer circulated sprinkling in two-grade desulfurizing tower while packing layer (12) in desulfurizing tower,
Remaining SO in flue gas2Further with carbide slag slurry B in Ca (OH)2Reaction generation calcium sulfite, calcium sulfite slurries lead to
Cross two-grade desulfurizing slurry pool (15) and enter the layering of sedimentation basin (20) bottom precipitation, calcium sulfite of the bottom solid content in 30-50%
Serum recycle enters in first grade desulfurizing slurry pool (8), same to force oxidation generation gypsum slurries, and sedimentation basin (20) upper clear supernate is overflow
Stream enters in clean solution tank (32)；
Step (3)：Flue gas after being purified through two-grade desulfurizing tower (13) enters wet-esp demister (29), cigarette by flue (23)
After gas is purified through two-step desulfurization tower, containing more water smoke and PM2.5, wet-esp demister (29) is entered after flue gas dispersion
Positive plate (28) between, periphery negative electrode awns line (27) corona effect under, water smoke and PM2.5 in flue gas by chargedization simultaneously
Movement is adhered on positive plate (28), and the spray liquid of the wet EFI drenching layer (26) in wet-esp demister will be adsorbed in anode
Water smoke and PM2.5 on plate (28) are washed away into clean solution tank (32), remove the clean flue gas of water smoke and PM2.5 by wet-esp
The exhanst gas outlet discharge of demister, completes the desulfurization and dedusting discharge of flue gas, and the clear liquid in clean solution tank (32) flows into first grade desulfurizing slurry
In liquid pool (8), the water balance for keeping first grade desulfurizing slurry pool (8) internal；
Step (4)：After forcing the gypsum slurries after oxidation to be classified through dewatering cyclone (38) in first grade desulfurizing slurry pool (8), will
Concentration of slurry is sent into vacuum belt filter (39) and is further dehydrated in the bottom slurry of 40-55%, and ultimately forms moisture content and be less than
10% gypsum filter cake, dewatering cyclone (38) top slurries of the stream concentration less than 4% send to Waste Water Treatment.
2. a kind of acetylene sludge-gypsum process flue gas deep desulfuration dust collection method according to claim 1, the first grade desulfurizing slurry
What carbide slag slurry A and carbide slag slurry B in liquid pool (8) and two-grade desulfurizing slurry pool (15) were provided comprises the following steps that：
During carbide slag solid is by manually or mechanically adding carbide slag slurries liquid pool (33), process water dilution is configured to concentration in 15-
25% carbide slag slurry, after being classified through one-level cyclone (34), underflow enters deckered stock chest (37), and mixes with a small amount of process water and match somebody with somebody
Carbide slag slurry A of the concentration in 20-30%, pH value between 5-6 is set to, through pump and pipeline to first grade desulfurizing slurry pool
(8)；One-level cyclone (34) top stream slurries enter second cyclone (35) and are further classified, second cyclone (35) bottom slurry
Telegram in reply rock ballast slurry pool (33), second cyclone (35) top stream slurries go to thin pulp pond (36), and process water is diluted to concentration in 2-
6%th, carbide slag slurry B of the pH value between 7-8, by pump and pipeline to two-grade desulfurizing slurry pool (15).
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Families Citing this family (15)
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|---|---|---|---|---|
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| CN106039911A (en) * | 2016-07-29 | 2016-10-26 | 中国神华能源股份有限公司 | Equipment and method for flue gas treatment |
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| CN109351155B (en) * | 2018-11-19 | 2024-06-04 | 江苏一环集团有限公司 | Carbide slag-gypsum wet flue gas desulfurization device and desulfurization method |
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| CN110813046A (en) * | 2019-11-29 | 2020-02-21 | 杨昆 | Double-circulation desulfurization device and desulfurization process |
| CN113019111A (en) * | 2021-03-12 | 2021-06-25 | 山东省环境保护科学研究设计院有限公司 | Preparation system and method of limestone-gypsum method desulfurization slurry with carbide slag as raw material |
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| CN113797739A (en) * | 2021-11-02 | 2021-12-17 | 福建龙净环保股份有限公司 | Limestone-gypsum method flue gas desulfurization system and limestone-gypsum method flue gas desulfurization method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500223A (en) * | 2011-12-02 | 2012-06-20 | 武汉永清环保科技工程有限公司 | Equipment for performing wet-method flue gas desulfurization and producing gypsum by discarded carbide slag |
| CN102921287A (en) * | 2012-10-30 | 2013-02-13 | 北京国电龙源环保工程有限公司 | Double-tower double-circulation limestone wet method desulfurization device and method |
| CN103691296A (en) * | 2013-12-12 | 2014-04-02 | 上海龙净环保科技工程有限公司 | Water circulating system and method of PM2.5 flue gas treatment tower |
| CN103768908A (en) * | 2013-10-30 | 2014-05-07 | 上海龙净环保科技工程有限公司 | Removal tower and technology for wet-type integration desulfurization, denitrification, demercuration and PM 2.5 removal |
| CN103977664A (en) * | 2014-05-16 | 2014-08-13 | 山西清泽环境科技有限公司 | Flue gas desulfurization, denitration and dust removal method |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012179528A (en) * | 2011-02-28 | 2012-09-20 | Hitachi Plant Technologies Ltd | Power source controller for electric precipitator, and electric precipitator having the same |
| JP6553324B2 (en) * | 2013-08-30 | 2019-07-31 | 住友金属鉱山エンジニアリング株式会社 | Power supply control apparatus and method for electrostatic precipitator |
-
2015
- 2015-03-20 CN CN201510126119.8A patent/CN104740992B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500223A (en) * | 2011-12-02 | 2012-06-20 | 武汉永清环保科技工程有限公司 | Equipment for performing wet-method flue gas desulfurization and producing gypsum by discarded carbide slag |
| CN102921287A (en) * | 2012-10-30 | 2013-02-13 | 北京国电龙源环保工程有限公司 | Double-tower double-circulation limestone wet method desulfurization device and method |
| CN103768908A (en) * | 2013-10-30 | 2014-05-07 | 上海龙净环保科技工程有限公司 | Removal tower and technology for wet-type integration desulfurization, denitrification, demercuration and PM 2.5 removal |
| CN103691296A (en) * | 2013-12-12 | 2014-04-02 | 上海龙净环保科技工程有限公司 | Water circulating system and method of PM2.5 flue gas treatment tower |
| CN103977664A (en) * | 2014-05-16 | 2014-08-13 | 山西清泽环境科技有限公司 | Flue gas desulfurization, denitration and dust removal method |
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