CN102631811A - Device and method for separating and removing impurities of carbide slag desulfurized gypsum slurry - Google Patents
Device and method for separating and removing impurities of carbide slag desulfurized gypsum slurry Download PDFInfo
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- CN102631811A CN102631811A CN2012101146548A CN201210114654A CN102631811A CN 102631811 A CN102631811 A CN 102631811A CN 2012101146548 A CN2012101146548 A CN 2012101146548A CN 201210114654 A CN201210114654 A CN 201210114654A CN 102631811 A CN102631811 A CN 102631811A
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Abstract
The invention discloses a device and method for separating and removing impurities of carbide slag desulfurized gypsum slurry, belonging to the technical field of smoke desulfurization. The device for separating and removing the impurities of the carbide slag desulfurized gypsum slurry comprises a hydraulic cyclone separator and a vacuum belt filter and further comprises a primary settling tank and a secondary settling tank, wherein the primary settling tank and the secondary settling tank are internally provided with stirring blades; the upper part of the primary settling tank is provided with a circulating water inlet, a circulating water outlet and a first slurry inlet, and the first slurry inlet is communicated with the bottom of the hydraulic cyclone separator through a pipe; the first slurry outlet is arranged at the bottom of the primary settling tank; the secondary settling tank is internally provided with a process water pipe, an overflow opening and a second slurry inlet, and the second slurry inlet is communicated with the first slurry outlet through a pipeline; and a second slurry outlet is arranged at the bottom of the secondary settling tank through the pipe and is communicated with the slurry inlet of the vacuum belt filter through the pipe. According to the device and method for separating and removing the impurities of the carbide slag desulfurized gypsum slurry, disclosed by the invention, the gypsum slurry prepared by the carbide slag desulfurization process is separated through cyclone and then sequentially settled through two stages, black suspension impurities are removed, and the desulfurized gypsum with water content of lower than 10% is prepared.
Description
Technical field
The present invention relates to the flue gas desulfurization technique field, be specifically related to the apparatus and method that a kind of carbide slag desulfurated plaster slurries separate removal of impurities.
Background technology
The carbide slag main component is Ca (OH)
2, Mg (OH)
2Deng alkaline matter, can be used as the desulfurizing agent of flue gas desulfurization.At present, it is in the majority with wet method to utilize alkaline trade waste such as carbide slag to carry out flue gas desulfurization, adopts carbide slag significant for reducing flue gas desulfurization operating cost, the treatment of wastes with processes of wastes against one another, protection environment as desulfurizing agent.
Publication number is that the Chinese patent document of CN101642674A discloses the pretreated wet fuel gas desulfurizing technology of a kind of carbide slag slurry; As desulfurizing agent flue gas being carried out wet desulphurization with carbide slag slurry handles; In carbide slag slurry, add catalyst; And blast air and carry out oxidation reaction, the carbide slag slurry after the oxidation reaction remakes to desulfurizing agent carries out smoke-gas wet desulfurization and handles.Publication number is that the Chinese patent document of CN101816891A discloses the pretreated ozonation and wet-method flue gas desulphurization process of a kind of carbide slag; As desulfurizing agent flue gas is carried out wet desulphurization with carbide slag; In calcium carbide scorification slag process, feed the gaseous mixture of ozone and oxygen; Carry out oxidation reaction, and then with the carbide slag slurry after the oxidation flue gas is carried out wet desulphurization and handle.Above-mentioned two kinds of sulfur removal technologies all are to be desulfurizing agent with the carbide slag, handle being used for after the carbide slag slurry oxidation pre-treatment that flue gas is carried out sulfur removal technology, reach the purpose of the treatment of wastes with processes of wastes against one another, economic environmental protection.But because the special nature of carbide slag, there are a lot of problems in the processing of the accessory substance gypsum slurries that flue gas desulfurization obtained by carbide slag, and the gypsum dehydration performance is bad, and moisture content is very high in the final gypsum patty will.
Carbide slag is the wet trade waste of a large amount of dischargings in the preparation of ethyne by carbide process, contains the more impurity that the process upstream section is brought into that comes from.Ash in partial impurities and the flue gas grades and in the absorption tower, constantly accumulates, and forms a kind of particle diameter below 5 μ m, and real density is at 1.5～1.8g/cm
3Between black suspension impurity, after hydraulic cyclone separated, stream returned the absorption tower to this material of part through the top; Part together gets into vacuum band filter with gypsum, has verified this black suspension impurity particle diameter less than gypsum, and hydrocyclone is difficult to separate; Adhesion is bigger simultaneously, is easy to be adsorbed in gypsum surface, stops up the hydrophobic duct of gypsum;,, be to influence the gypsum moisture content that vacuum band filter comes out can not be stabilized in the main cause below 10%.
Notification number is dewatering and the device that the Chinese invention patent of CN1325419C discloses a kind of flue gas desulfurization gypsum slurry; Next door at desulfuration absorbing tower connects drying tower; The gypsum slurries discharge pipe of desulfuration absorbing tower bottom is connected to the sprayer unit on drying tower top through the gypsum excavationg pump, and first tributary pipe of former flue is communicated to the mouth that advances of drying tower bottom through booster fan, parget water sub-controller or the flue gas distributor of series connection; The drying tower bottom is provided with the gypsum displacer; The second tributary manifold of the pipe of drying tower and former flue closes, and is communicated to the mouth that advances of desulfuration absorbing tower, and the smokejack of desulfuration absorbing tower is connected with chimney.This device makes full use of former flue gas heat; Accomplish the dehydration of desulfurated plaster slurries with lower energy consumption; The hydrocyclone and the vacuum belt of conventional dehydration system have been saved; Be applicable to the gypsum dehydration technology of limestone-gypsum wet fuel gas desulfurizing technology, if this technology is used for the gypsum slurries dehydration of carbide slag-gypsum wet sulfur removal technology, because black suspension impurity is stronger to the adsorption capacity of Free water in the gypsum slurries of carbide slag sulfur removal technology; Hot flue gas can not effectively be removed this part moisture, so this technology is inapplicable and the dehydration of the gypsum slurries of carbide slag-gypsum wet sulfur removal technology.
Summary of the invention
The invention provides the apparatus and method that a kind of carbide slag desulfurated plaster slurries separate removal of impurities; Utilize black suspension impurity rate of settling different features in gypsum particle and the carbide slag gypsum slurries; Adopt the secondary sedimentation to remove black suspension impurity in the carbide slag gypsum; Guarantee that the gypsum moisture content is stabilized in below 10%, simultaneously Ca (OH) in the slurries
2, CaCO
3Deng less desulfurizing agent of particle etc. removal effect is preferably arranged also, effectively improve the quality of carbide slag desulfurated plaster.
A kind of carbide slag desulfurated plaster slurries separate the device of removal of impurities, comprise hydrocyclone and vacuum band filter, also comprise the first grade subsides groove and the secondary subsider of equal built-in stirring blade; Described first grade subsides groove top is provided with recirculated water inlet, circulating water outlet and first slurries inlet, and described first slurries inlet is communicated with said hydrocyclone bottom through pipeline; Described first grade subsides trench bottom is provided with the outlet of first slurries; Second slurries inlet that is provided with fresh water (FW) technology water pipe, overfall in the described secondary subsider and is communicated with the outlet of first slurries through pipeline; Described secondary subsider bottom is provided with second slurries outlet that is communicated with the slurries inlet of vacuum band filter through pipeline.
The gypsum slurries of carbide slag desulfurization continues to return desulfurizing tower through the stream of the top after the cyclonic separation in gypsum pumping water inlet power cyclone separator, the underflow slurries are sent in the first grade subsides groove; Start the paddle in the first grade subsides groove, through recirculated water entrance and exit delivery cycle water in the first grade subsides groove, the gypsum particle in the gypsum slurries is different with the rate of settling of black suspension impurity simultaneously; Low mixing speed (60～150 change/min) gypsum particle sinks in the slurries of bottom down, the black suspension impurity in the gypsum slurries floats in the supernatant liquid on then, and along with recirculated water flows out; After sedimentation finishes; About 70% black suspension impurity is recycled water and takes away in the gypsum slurries, and the underflow slurries are delivered in the secondary subsider, starts the paddle in the secondary subsider; Simultaneously through technology water pipe delivery technology water in the secondary subsider; Same, low mixing speed (60～150 change/min) gypsum particle sinks down in lower floor's slurries down, the black suspension impurity of remainder then disperses into fresh water (FW) to come-up in the gypsum slurries; And along with fresh water (FW) flows out; About 30% black suspension impurity of remainder separated remove, after sedimentation finishes, the underflow slurries are sent in the vacuum band filter dewater.
The general subsider or the bottom of agitator tank and outer wall junction are all at an angle of 90; Being provided with easily like this forms the stirring dead angle in the corner of bottom and outer wall; Also be unfavorable for simultaneously the smooth discharge of slurries; So as a kind of optimized technical scheme of the present invention, it is 45～50 ° gathering section that the bottom of said first grade subsides groove and secondary subsider has the angle of inclination, the height of described gathering section is 1/6～1/5 of place subsider height.
Because the special nature of carbide slag contains a lot of black suspension impurity in the gypsum slurries of carbide slag sulfur removal technology, these black suspension impurity particle diameters are about 0～5 μ m; Sinking speed still still possesses certain settling character not as gypsum, and hydraulic cyclone can not be removed; So the present invention is provided with the two-stage subsider, paddle is set in subsider, the slurries that come out from the hydrocyclone underflow pass through the sedimentation separation of two-stage subsider successively; Because in whipping process; Gypsum particle in the slurries sinks, and the slurries that contain a large amount of gypsum particles mainly are positioned at the bottom of subsider, can access sufficient stirring in order to make slurries; Black suspension impurity can be separated to greatest extent; The blade of described paddle is arranged on the bottom of subsider, for the slurries that make whole subsider bottom can both be stirred fully, as a kind of optimized technical scheme; Described first slurries outlet and the outlet of second slurries all are positioned at the gathering section of place subsider, and described paddle is provided with two groups of blades up and down.
Last blade is positioned at 1/3～2/5 place, groove subsider bottom, distance place, and following blade is positioned at the gathering section of subsider bottom, place, apart from subsider bottom 10～20cm; Gypsum particle content higher slurries in subsider middle and lower part all can be stirred fully like this; Black suspension impurity in the slurries just can better be separated, when going out oar after sedimentation finishes, because grout outlet has the stirring action of following blade; The deposition of slurries and the obstruction of grout outlet can be prevented, oar can be gone out smoothly; A kind of preferred technical scheme, described upward blade is two, following blade is four; Be straight oblique 45 ° of blades; Because following blade is near the slurries exit, following blade is set to 4, under equal mixing speed, can strengthen the stirring dynamics; Prevent the deposition of slurries, slurries can be discharged from the slurries outlet more smoothly in the subsider bottom.
During sedimentation, continuous feeds recirculated water to slurries in the first grade subsides groove in the first grade subsides groove, and recirculated water is from the input of recirculated water inlet; Circulating water outlet is discharged, and in the continuous whipping process of paddle, the gypsum particle in the slurries sinks; Black suspension impurity disperses to advance in the recirculated water on top toward come-up, and along with recirculated water flows out; The first grade subsides groove is when operate as normal; The black suspension interface on gypsum slurries and the top of bottom is at 1/2～2/3 place apart from the bottom, so for the removal of impurities that makes recirculated water can participate in slurries better separates and swimmingly the black suspension impurity in the slurries taken out of, as a kind of optimized technical scheme of the present invention; Said recirculated water inlet is 3/4～5/6 of a first grade subsides groove height with the distance of first grade subsides trench bottom, is preferably 5/6 of first grade subsides groove height; The distance of said circulating water outlet and first grade subsides trench bottom is 2/3～3/4 of a first grade subsides groove height, is preferably 2/3 of first grade subsides groove height.
About 70% black suspension impurity all is removed in the first grade subsides groove in the gypsum slurries; Part black suspension impurity possibly overstock in gypsic horizon, so, as a kind of optimal technical scheme of the present invention; The delivery port of said technology water pipe is positioned at the below of blade; Preferably, be positioned at 20～50cm place, below, the grout outlet of the pipeline of said connection second slurries inlet is positioned at 10～20cm place, top of blade.Through the technology water pipe to secondary subsider bottom delivery technology water; And the outlet of fresh water (FW) is recently low from the outlet of the underflow slurries of first grade subsides groove, when sending the secondary subsider to from the underflow slurries of first grade subsides groove, just receives the mixing power from below technology buoyancy of water and paddle so simultaneously, overstocks black suspension impurity in gypsic horizon and under double action, just can better disperse in the slurries; Under stirring action; Gypsum particle sinks, and black suspension impurity flows out from overfall with fresh water (FW) to come-up; In the gypsum slurries after the secondary sedimentation; Black impurity can be removed completely, delivers at last in the vacuum band filter and dewaters, and can access moisture content at the desulfurated plaster below 10%.
During secondary subsider operate as normal; For gypsum particle can be separated with black suspension impurity better; As a kind of optimized technical scheme; In the secondary subsider, be provided with 2～3 layers of separated baffle plate or conduit of flowing that are positioned at the overfall below, the distance of described overfall and secondary subsider bottom is 3/4～5/6 of a secondary subsider height.It is some at a distance from flow that described separated stream baffle plate is set to be parallel to each other, and have the angle of 30～60 degree with vertical direction, and be provided with carriage, and all are fixed on this carriage at a distance from the two ends of flows.Described conduit, the some oblique cutting pipes that comprise the gripper shoe of horizontal positioned and run through this gripper shoe, all oblique cutting pipes be parallel to each other and with vertical direction have 30～60 the degree angle.The separated flow of the separated stream of adjacent two layers baffle plate or the oblique cutting pipe of adjacent two layers conduit are mutually 30～60 degree angles and put.In whipping process; Possibly have in the stirring entering upper strata black suspension of gypsum particle along with paddle of part, flow out with fresh water (FW), like this certainly will be for causing the decline of gypsum output; Be provided with at a distance from stream baffle plate or conduit; Just can only allow black suspension to pass through with the gypsum particle retaining below, flow out with fresh water (FW).During secondary subsider operate as normal, the interface of lower floor's slurries and upper strata suspension should at a distance from the below of stream baffle plate or conduit, roughly be positioned at 1/2～2/3 of secondary subsider and highly locate above last blade.
For the recirculated water and the fresh water (FW) that flow out in first grade subsides groove and the secondary subsider can be fully utilized, the present invention also is provided with a dashpot, and said dashpot is communicated with respectively with recirculated water inlet, circulating water outlet and overfall.After the process simple process, continue to return in the first grade subsides groove and circulate in dashpot by the water outlet that comes in first grade subsides groove and the secondary subsider, water resource can be used more effectively.
Can carry out preliminary sedimentation processing eaily in order to make from the water outlet of first grade subsides groove and secondary subsider; Return recycle in the first grade subsides groove; As a kind of optimized technical scheme; Cylinder barrel shaped is arranged on described dashpot top, and turbination is arranged in the bottom, and the middle part is provided with at a distance from stream baffle plate or conduit (this is consistent with structure in the secondary subsider at a distance from stream baffle plate or conduit) in the described cylindrical drum; The pipeline of communication loop water inlet with is communicated with at a distance from stream baffle plate or conduit top, the pipeline of communication loop water out and overfall is communicated with below flowing baffle plate or conduit with separated.Like this; Water in the dashpot passes through settlement action; Black suspension impurity mainly is distributed at a distance from the stream baffle plate or below the conduit, discharges through the dashpot bottom, sends Waste Water Treatment to; Water more than stream baffle plate or conduit can satisfy the requirement of first grade subsides recirculated water, continues to send to recycle in the first grade subsides groove.
In infall process; Need the slurries sedimentation situation in the in good time observation subsider; Because all being positioned at 1/2～2/3 of place subsider, the interface of two-stage subsider highly locates; So,, be equipped with peep hole on described first grade subsides groove and the secondary subsider outer wall as a kind of optimized technical scheme; The top of described peep hole is 2/3 of a subsider height with the distance of subsider bottom, place, and the distance bottom the subsider of place bottom of described peep hole is 1/2 of a subsider height.Can better observe the sedimentation situation in the subsider more easily.
When making recirculated water send in the first grade subsides groove; Can more large-arealy contact with slurries; Can better discharge during discharge; Described recirculated water inlet and circulating water outlet are set to flat taper shape with the pipeline place of connection, and the outer wall of a flat conical end opening place of expanding and first grade subsides groove is tangent, and 3～5 blocks of following current plates that recirculated water is divided equally are set in flat taper shape; The following current plate that direction is set is consistent with water (flow) direction, divide equally the back from the recirculated water of dashpot through the following current plate in the recirculated water porch of first grade subsides groove and get in the first grade subsides groove.
For make slurries can be to greatest extent in whipping process with send subsider in recirculated water or fresh water (FW) contact; As a kind of optimized technical scheme, be mutually 120 degree angles in the said secondary subsider between the delivery port of technology water pipe, overfall and second slurries inlet; The recirculated water inlet just in time is positioned at the relative both sides of first grade subsides groove with circulating water outlet in the said first grade subsides groove.
The conveying of gypsum slurries between hydrocyclone, first grade subsides groove, secondary subsider and vacuum band filter can be able to by the power of pump implement; Also can be provided with through the relation of the position between them; Make slurries because the gravity effect is able to smooth delivery of power between them, therefore, as a kind of optimized technical scheme of the present invention; Described waterpower is revolved cyclone separator and is positioned at the top, and the below sets gradually first grade subsides groove and secondary subsider and vacuum band filter.Like this, slurries just can be delivered to the first grade subsides groove from hydrocyclone by its gravity effect, send the secondary subsider to from the first grade subsides groove again, send the dehydration of vacuum band filter to from the secondary subsider at last, greatly reduce energy consumption, reduce the production cost of enterprise.
The bottom of described hydrocyclone also is provided with pipeline and is communicated with the slurries inlet of vacuum band filter.On the pipeline that is communicated with vacuum band filter and first grade subsides groove, be equipped with valve; When gypsum slurries need not carry out two-stage sedimentation removal of impurities; Can directly the underflow slurries of hydrocyclone be sent in the vacuum band filter and dewater, so this dewatering process also can be used in the sulfur removal technologies such as limestone-gypsum method gypsum slurries being dehydrated.Gypsum slurries requirement according to different sulfur removal technologies; Can adjust device of the present invention very easily; Decision adopts directly dehydration still through dewatering after the two-stage sedimentation in fact, and same set of device can adapt to the gypsum dehydration of different sulfur removal technologies, has reduced the production cost of enterprise greatly.When first grade subsides groove and secondary subsider are not used in the gypsum removal of impurities, can change mixing speed in addition, use it for desulfurization thinner stock tank, waste water storage tank etc., save fixed capital investment.
In order to access recycle to the water that gypsum in the vacuum band filter is sloughed; The present invention also is provided with a tank; Send in this tank from the filtered water of vacuum band filter, through the technology cross current of pipeline and secondary subsider, send in the secondary subsider and recycle then.
For gypsum slurries is stirred in the first grade subsides groove fully, the grout outlet of described first slurries inlet is positioned at 10～20cm place of the last blade top of paddle.
As a kind of preferred technical scheme; It is 45～50 ° gathering section that the bottom of said first grade subsides groove and secondary subsider has the angle of inclination; The described height that draws section in is 1/6～1/5 of a subsider height; Described first slurries outlet and the outlet of second slurries all are positioned at the gathering section of place subsider; Described paddle is provided with two groups of blades up and down, and last blade all is positioned at 1/3 of place subsider highly to be located, and the height of following blade all exports on same horizontal plane with the slurries that belong to subsider; Described recirculated water inlet is communicated with the top of separated stream baffle plate or conduit described in the dashpot, and described circulating water outlet and overfall are communicated with the below of separated stream baffle plate described in the dashpot.The gathering section setting of the setting of upper and lower blade and subsider bottom is stirred slurries more fully in the subsider of place; Black suspension impurity can access to greatest extent and separate; With blade and grout outlet are on same horizontal plane at present, after sedimentation was accomplished, the bottom slurries went out oar in whipping process; Slurries can or not stop up grout outlet in bottom deposit yet; Two-stage subsider structure makes the black suspension impurity in the slurries can access effective removal, prepares higher-quality gypsum; Dashpot can make the water outlet of two-stage sedimentation obtain recycle, reduces the production cost of enterprise greatly.
The present invention also provides a kind of carbide slag desulfurated plaster slurries to separate the method for removal of impurities, comprising:
After hydraulic cyclone separated, the underflow slurries were introduced the first grade subsides groove with described gypsum slurries, stirred and carried out first grade subsides, utilized recirculated water to remove the upper strata suspended impurity when carrying out first grade subsides;
Underflow slurries behind the first grade subsides are introduced the secondary subsider; The secondary sedimentation is carried out in stirring; Feed to the secondary subsider when carrying out the secondary sedimentation and be used to the recycled process water of promoting that turbulent flow forms, the top stream after the secondary sedimentation is discharged, the underflow slurries carry out vacuum filtration dewater gypsum.
From particle grain size in the gypsum slurries of carbide slag sulfur removal technology is 30～100um, and the solid-liquid concentration of slurries is 10～70%.Because the special nature of carbide slag; A lot of black impurities are arranged in the gypsum slurries, and these impurity stick to the gypsum particle surface easily, are difficult for removing; The present invention utilizes the rate of settling of gypsum particle and black impurity different, stirs black impurity in the gypsum slurries and unreacted Ca (OH) through two-stage
2Remove Deng desulfurizing agent and the tiny gypsum of part particle, the gypsum after the removal of impurities dewaters more easily.
As a kind of optimized technical scheme, the mixing speed of described first grade subsides and secondary sedimentation is 60～150 commentaries on classics/min.Under this mixing speed, black suspension impurity is with the motion come-up of current, and density, the gypsum that particle is bigger still are in the sedimentation state, and the gypsum particle in the gypsum slurries can be good at separating with black impurity.Speed of agitator is during greater than 150 commentaries on classics/min, and the less relatively gypsum particle of part particle diameter also will float with current, will be unfavorable for the black suspension separate impurities.
Said percentage is not having under the situation of specified otherwise all mass percents among the present invention.
Beneficial effect of the present invention:
(1) after hydraulic cyclone technology; Set up the two-stage subsider; Utilize the difference of gypsum and the black suspension impurity rate of settling in the carbide slag gypsum slurries, remove most of black suspension impurity in the gypsum, also can effectively separate unreacted Ca (OH) in the gypsum slurries simultaneously
2In desulfurizing agent and the tiny gypsum of part particle, improve gypsum purity, reduce gypsum moisture content etc.
When (2) black suspension impurity content value lower, that the gypsum moisture content is stabilized in regulation is following in the gypsum, can not launch this technology; After the subsider that relates in the technology changes speed of agitator, can be used as desulfurization thinner stock tank simultaneously, waste water tank etc. are saved the permanent plant investment.
(3) technologies such as gypsum drying be can save, equipment investment, energy consumption reduced.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the structural representation of first grade subsides groove shown in Figure 1;
Fig. 3 is the vertical view of first grade subsides groove shown in Figure 2;
Fig. 4 is the structural representation of secondary subsider shown in Figure 1;
Fig. 5 is the vertical view of secondary subsider shown in Figure 4.
Each Reference numeral is following among the figure:
1-hydrocyclone 2-first grade subsides groove 3-secondary subsider
4-dashpot 5-vacuum band filter 6-tank
201-paddle one 202-circulation fluid inlet 203-following current baffle plate
The outlet of 204-first slurries inlet 205-peep hole one 206-circulation fluid
207-first slurries outlet 301-paddle two 302-are at a distance from the stream baffle plate
The outlet of 303-technology water pipe 304-second slurries inlet 305-second slurries
306-overfall 307-peep hole two
The specific embodiment
As shown in Figure 1; A kind of carbide slag desulfurated plaster slurries separate the device of removal of impurities; Comprise hydrocyclone 1, first grade subsides groove 2, secondary subsider 3, dashpot 4, vacuum band filter 5 and tank 6; Hydrocyclone 1 directly adopts the commercially available prod with vacuum band filter 5, and that adopt in the present embodiment is the feed rate 57.36m that Beijing China moral foundation environmental protection equipment Co., Ltd produces
3/ h, underflow flow 18.032m
3/ h, excess flow 35.728m
3The DU13/1800 vacuum belt filter that the hydrocyclone of/h and Huzhou Hehua Machinery Co., Ltd. produce, tank 6 adopts common tank to get final product.
Like Fig. 2, shown in Figure 3; First grade subsides groove 2 adopts cylindrical groove, and it is 45 ° gathering section that the bottom of this subsider has the angle of inclination, and the height that draws section in is 1/6 of this subsider height; On the bottom of this subsider gathering section, first slurries outlet 207 is set; First slurries inlet 204 is set at the top of this subsider, in outer wall one side of this subsider and highly locate to be provided with recirculated water apart from base plate 5/6 and enter the mouth 202, enters the mouth on the outer wall of 202 relative sides and be positioned at this subsider 2/3 with recirculated water and highly locate to be provided with circulating water outlet 206; Recirculated water inlet 202 all is arranged to flat taper shape with circulating water outlet 206 with the external pipeline place of connection; A flat conical end that expands links to each other with the outer wall of this subsider, and the outer wall of opening part and this subsider is tangent, at recirculated water 202 places that enter the mouth following current baffle plate 202 is set; Following current baffle plate 202 is three vertical flat boards; Plane, dull and stereotyped place and the recirculated water direction that flows is consistent, and the recirculated water 202 flat taper shapes that enter the mouth are equally divided into 4 lattice, and recirculated water is after 202 dispersions of following current baffle plate in the entering first grade subsides groove 2.In first grade subsides groove 2, be provided with by motor-driven paddle 1; Paddle 1 is provided with upper and lower two groups of blades, and last blade is positioned at apart from this 1/3 place, subsider bottom, is set to two; Following blade is arranged on first slurries and exports on the 207 same level faces; Be set to four, upper and lower blade all is arranged to flat, and plane, blade place becomes 45 with horizontal plane.The pipeline that is communicated with first slurries inlet 204 stretches in this subsider, and its outlet is positioned at 15cm place, blade top.
Peep hole 1 is set on the outer wall of first grade subsides groove 2, and the shape of this peep hole 1 can be provided with according to the difference hobby, can be arranged to circle, rectangle, square etc.; No matter be arranged to any shape; The top that guarantees peep hole 1 is positioned at 2/3 place highly of this subsider, is positioned at 1/2 of this subsider bottom and highly locates, and the size in hole is as the criterion with the sedimentation situation that can conveniently observe in the subsider; In the present embodiment; This peep hole 1 is arranged to its length direction along the axial slot of this subsider, and width is set to 15cm, and the material of this peep hole 1 adopts transparent materials such as lucite.
Like Fig. 4, shown in Figure 5; Secondary subsider 3; Also be cylindrical groove, its sized, polycrystalline substance are consistent with first grade subsides groove 2, on this subsider outer wall and be positioned at this subsider 5/6 and highly locate to be provided with overfall 306; The bottom is provided be provided with position and first slurries of first grade subsides groove 3 of second slurries outlets, 305, the second slurries outlet 305, and to export 207 position identical.
In secondary subsider 3, be provided with motor-driven paddle 2 301; Paddle 1 in this paddle and the first grade subsides groove 2 consistent; This subsider outer wall is provided with peep hole 2 307, and the position of the peep hole 1 on the outer wall of this peep hole and first grade subsides groove 2, size etc. are all consistent.
In secondary subsider 3 near be provided with below the overfall 306 3 layers at a distance from stream baffle plates 302; Every layer of some separated flow that is set to be parallel to each other at a distance from stream baffle plate 302; And should have the angle of 45 degree at a distance from flow plane, place and vertical direction, and be provided with carriage, all are fixed on this carriage at a distance from the two ends of flow; Adjacent two layers is mutually 60 degree angles between the separated flow of stream baffle plate; Be provided with second slurries inlet 304 at the top of this subsider, also be provided with the technology water pipe 303 to this subsider bottom delivery technology water, the grout outlet that is communicated with the pipeline of second slurries inlet 304 is positioned at 15cm place, blade top; Technology water pipe 303 is close to the subsider inwall and is goed deep in the subsider, and its delivery port is arranged to 45 ° of inclined-plane openings and is positioned at 30cm place, blade below.
Second slurries inlet 304 and technology water pipe 303 that the position is set is roughly the same; The position that is provided with of technology water pipe 303, overfall 306 and second grout outlet 305 is seen from vertical view shown in Figure 4 and is mutually hexagonal angle, guarantees that slurries can contact with fresh water (FW) to greatest extent.
Hydrocyclone 1 is positioned at the top, down sets gradually first grade subsides groove 2, secondary subsider 3 and vacuum band filter 5, and vacuum band filter 5 is positioned at below, near vacuum band filter 5, tank 6 is set.
The underflow outlet of hydrocyclone 1 is provided with the two-way pipeline; One the tunnel directly is communicated with the slurries inlet of vacuum band filter 5; Another road is communicated with first slurries inlet 204; The outlet 207 of first slurries is communicated with the outlet 207 of second slurries inlet, 304, the second slurries is communicated with vacuum band filter 5 through pipeline slurries inlet through pipeline; The device of vacuum band filter 5 splendid attire filtered water is communicated with tank 6 through pipeline, and tank 6 is communicated with the technology water pipe 303 of secondary subsider 3 through the pipeline of band pump; Recirculated water inlet 202 is through being communicated with at a distance from stream baffle plate top in pipeline and the dashpot 4, and circulating water outlet 206 and overfall 306 are communicated with below flowing baffle plate through pipeline and dashpot 4 separated, like this; Water in the dashpot passes through settlement action; Black suspension impurity mainly is distributed in below the stream baffle plate, discharges through dashpot 5 bottoms, delivers to Waste Water Treatment; Water more than the stream baffle plate can satisfy the requirement of first grade subsides recirculated water, continues to send to recycle in the first grade subsides groove 2.Be equipped with valve on all connecting pipelines.
Technological process of the present invention is following:
Gypsum slurries A from the carbide slag sulfur removal technology; Deliver to and carry out cyclonic separation in the hydrocyclone 1; Top stream returns and continues circulation in the sulfur removal technology after the cyclonic separation; Underflow is 15cm through connecting pipeline is delivered to the last blade of the paddle 1 in the first grade subsides groove 2 from first slurries inlet 204 above; The fresh water (FW) that has 1/2 height in the first grade subsides groove 2 in advance, motor-driven paddle 1 stir slurries in the first grade subsides grooves 2 (rotating speed of paddle changes 60～150/min), realize the flowing of recirculated water in the first grade subsides groove 2 through dashpot 4, recirculated water inlet 202 and circulating water outlet 206 and connecting pipeline simultaneously.
Slurries in the first grade subsides groove 2 are in the whipping process of paddle 1; Gypsum particle wherein is because faster than the rate of settling of black suspension impurity; Therefore be dispersed in lower floor's slurries, and black suspension impurity is suspended in the supernatant liquid in whipping process because its rate of settling is slower; And along with recirculated water flows out to dashpot; In dashpot, return recycle in the first grade subsides groove 2 through preliminary sedimentation separation continued, when the slurries liquid level be higher than first grade subsides groove 2 height 5/6 after, upper strata black suspension liquid is discharged from circulating water outlet 206; Lower floor's slurries are discharged by first slurries outlet 207 in continuing whipping process, are delivered in the secondary subsider 3 through pipeline.Regulate the amount of slurry, pulp, recirculated water inflow, outflow, observe through peep hole 1, control bottom gypsum slurries and upper strata black suspension liquid interface are realized 2 continuous operations of first grade subsides groove apart from 1/2～2/3 place, first grade subsides groove 2 bottoms.Can remove in the gypsum slurries about 70% black suspension impurity through the sedimentation separation of first grade subsides groove 2, black impurity sedimentation separation in secondary subsider 3 of remaining about 30%.
Deliver to the last blade top 15cm of paddle 2 301 from second slurries inlet 304 through connecting pipeline from the underflow slurries of first grade subsides groove 2; Start paddle 2 301 (rotating speed of paddle changes 50～150/min); From tank 6, in technology water pipe 303, pump into fresh water (FW) through pump simultaneously, technology water pipe 303 is delivered to 30cm place, blade below with fresh water (FW) D, has the fresh water (FW) of 1/2 height in the secondary subsider 3 in advance; Send into slurries in the secondary subsider 3 under the acting in conjunction of the mixing power of technology buoyancy of water and paddle 2 301; Overstock black suspension impurity in gypsic horizon in the slurries and disperse in the fresh water (FW), and flow out from overfall 306, regulate slurry, pulp, fresh water (FW) influx with fresh water (FW); Observe from peep hole 2 307; Control bottom gypsum slurries and upper strata black suspension liquid interface are apart from 1/2～2/3 place, secondary subsider 3 bottoms, and the black suspension liquid on upper strata is delivered in the dashpot 4 through overfall 306, and lower floor's slurries are under agitation by 305 discharges of second grout outlet; Deliver to the slurries inlet of vacuum band filter 5, after 5 dehydrations of vacuum band filter, get gypsum patty will C.
All send to the dashpot 4 from the water that circulating water outlet 206, overfall 306 come out, through after the plain sedimentation processing, underflow B delivers to sewage disposal system in dashpot 4, and supernatant liquid is delivered to circulation in the first grade subsides groove 2.
Filtered water in the vacuum band filter 1 is sent to get in the secondary subsider 3 in the tank 6 and is recycled.
When the black suspension impurity content in the gypsum slurries is low, can not start above-mentioned technology, directly will deliver to the dehydration of vacuum band filter through the underflow slurries after hydrocyclone 1 separates.
Embodiment 1
From the gypsum slurries A of carbide slag sulfur removal technology, serum density 1.13g/cm
3, solid content 26% adopts said apparatus and technology to separate removal of impurities, and wherein the rotating speed of paddle one is 100 commentaries on classics/min, and the rotating speed of paddle two is 110 commentaries on classics/min, gained gypsum C moisture content 8.13%, purity 93.6%, black suspension impurity content 0.21%.
From the gypsum slurries A of carbide slag sulfur removal technology, serum density 1.11g/cm
3, solid content 22% adopts said apparatus and technology to separate removal of impurities, and wherein the rotating speed of paddle one is 80 commentaries on classics/min, and the rotating speed of paddle two is 120 commentaries on classics/min, gained gypsum C moisture content 8.25%, purity 94.3%, black suspension impurity content 0.33%.
From the gypsum slurries A of carbide slag sulfur removal technology, serum density 1.15g/cm
3, solid content 30% adopts said apparatus and technology to separate removal of impurities, and wherein the rotating speed of paddle one is 80 commentaries on classics/min, and the rotating speed of paddle two is 120 commentaries on classics/min, gained gypsum C moisture content 7.59%, purity 94.3%, black suspension impurity content 0.13%.
From the gypsum slurries A of carbide slag sulfur removal technology, serum density 1.13g/cm
3Solid content 26% is delivered to and is carried out cyclonic separation in the hydrocyclone 1, and top stream returns and continues circulation in the sulfur removal technology after the cyclonic separation; Underflow obtains gypsum patty will C after connecting pipeline gets into the dehydration of vacuum band filter; Gypsum patty will C moisture content 17.25%, purity 91.13%, black suspension impurity content 3.17%.
Claims (10)
1. the device of a carbide slag desulfurated plaster slurries separation removal of impurities comprises hydrocyclone (1) and vacuum band filter (5), it is characterized in that, also comprises the first grade subsides groove (2) and the secondary subsider (3) of equal built-in stirring blade (201,301); Described first grade subsides groove (2) top is provided with recirculated water inlet (202), circulating water outlet (206) and first slurries inlets (204), and described first slurries inlets (204) are communicated with said hydrocyclone (1) bottom through pipeline; Described first grade subsides groove (2) bottom is provided with first slurries outlets (207); Be provided with technology water pipe (303), overfall (306) in the described secondary subsider (3) and export second slurries that (207) be communicated with enter the mouth (304) through the pipeline and first slurries; Described secondary subsider (3) bottom is provided with second slurries outlets (305) that are communicated with the slurries inlet of vacuum band filter (5) through pipeline.
2. device according to claim 1 is characterized in that, it is 45～50 ° gathering section that the bottom of said first grade subsides groove (2) and secondary subsider (3) has the angle of inclination, and the height of described gathering section is 1/6～1/5 of place subsider height.
3. device according to claim 2 is characterized in that, described first slurries outlets (207) and second slurries outlets (305) all are positioned at the gathering section of place subsider, and described paddle (201,301) is provided with two groups of blades up and down.
4. device according to claim 3 is characterized in that, said recirculated water inlet (202) is 3/4～5/6 of first grade subsides groove (a 2) height with the distance of first grade subsides groove (2) bottom; Said circulating water outlet (206) is 2/3～3/4 of first grade subsides groove (a 2) height with the distance of first grade subsides groove (2) bottom.
5. device according to claim 4 is characterized in that, the delivery port of said technology water pipe (303) is positioned at the below of blade, and the grout outlet of the pipeline of said connection second slurries inlets (304) is positioned at 10～20cm place, top of blade.
6. device according to claim 5; It is characterized in that; In secondary subsider (2), be provided with 2～3 layers of separated baffle plate or conduit (302) of flowing that are positioned at overfall (306) below, described overfall (306) is 3/4～5/6 of secondary subsider (a 3) height with the distance of secondary subsider (3) bottom.
7. according to the described device of the arbitrary claim of claim 1～6, it is characterized in that, also be provided with a dashpot (4), said dashpot (4) is communicated with respectively with recirculated water inlet (202), circulating water outlet (206) and overfall (306).
8. device according to claim 7; It is characterized in that; Be equipped with peep hole (205,307) on described first grade subsides groove (2) and secondary subsider (3) outer wall; The top of described peep hole (205,307) is 2/3 of a subsider height with the distance of subsider bottom, place, and the distance bottom the subsider of place bottom of described peep hole (205,307) is 1/2 of a subsider height.
9. carbide slag desulfurated plaster slurries separate the method for removal of impurities; It is characterized in that after hydraulic cyclone separated, the underflow slurries were introduced the first grade subsides groove with described gypsum slurries; First grade subsides is carried out in stirring, utilizes recirculated water to remove the upper strata suspended impurity when carrying out first grade subsides; Underflow slurries behind the first grade subsides are introduced the secondary subsider; The secondary sedimentation is carried out in stirring; Feed to the secondary subsider when carrying out the secondary sedimentation and be used to the recycled process water of promoting that turbulent flow forms, the top stream after the secondary sedimentation is discharged, the underflow slurries carry out vacuum filtration dewater gypsum.
10. method according to claim 9 is characterized in that, the mixing speed of described first grade subsides and secondary sedimentation is 60～150 commentaries on classics/min.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104436854A (en) * | 2014-12-12 | 2015-03-25 | 四川达竹煤电（集团）有限责任公司石板选煤发电厂 | Slime water serial treatment system and slime water serial treatment process |
| CN104722136A (en) * | 2015-03-12 | 2015-06-24 | 刘国忠 | Process and device for separating flue gas desulfurization gypsum slurry through self operation |
| CN104959018A (en) * | 2015-06-25 | 2015-10-07 | 浙江天蓝环保技术股份有限公司 | Device and method for redesulfuration with desulfurization ash |
| CN109276947A (en) * | 2018-11-13 | 2019-01-29 | 中国北方稀土（集团）高科技股份有限公司 | The device and method being separated by solid-liquid separation in carbonated rare earth continuous production |
| CN109467115A (en) * | 2018-12-06 | 2019-03-15 | 安徽华塑股份有限公司 | A kind of carbide slag desulfurized gypsum slurries separation, impurity removal technique |
| CN112194163A (en) * | 2020-10-29 | 2021-01-08 | 西安热工研究院有限公司 | Desulfurization gypsum black surface layer removing system and method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0311763B1 (en) * | 1987-10-12 | 1993-10-06 | Passavant-Werke Ag | Sedimentation tank for water and waste water purification |
| US5500197A (en) * | 1990-10-30 | 1996-03-19 | Metallgesellschaft Aktiengesellschaft | Process of purifying gypsum |
| US6159380A (en) * | 1994-07-26 | 2000-12-12 | Container-Care International, Inc. | Water treatment process |
| JP3336061B2 (en) * | 1993-03-03 | 2002-10-21 | 千代田化工建設株式会社 | Manufacturing method of high purity white gypsum |
| CN1597069A (en) * | 2004-08-27 | 2005-03-23 | 北京国电龙源环保工程有限公司 | By product gymsum continuous dehydration method and device in smoke desulfurization process |
| JP2008062208A (en) * | 2006-09-11 | 2008-03-21 | Chugoku Electric Power Co Inc:The | Precipitation tank of desulfurized gypsum, and precipitation method of desulfurized gypsum |
| CN101397148A (en) * | 2007-09-24 | 2009-04-01 | 宝山钢铁股份有限公司 | Purification method of sintered flue gas desulfurization gypsum |
| CN202657976U (en) * | 2012-04-18 | 2013-01-09 | 浙江天蓝环保技术股份有限公司 | Device for removing impurity by separation of carbide slag desulfurized gypsum slurry |
-
2012
- 2012-04-18 CN CN201210114654.8A patent/CN102631811B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0311763B1 (en) * | 1987-10-12 | 1993-10-06 | Passavant-Werke Ag | Sedimentation tank for water and waste water purification |
| US5500197A (en) * | 1990-10-30 | 1996-03-19 | Metallgesellschaft Aktiengesellschaft | Process of purifying gypsum |
| JP3336061B2 (en) * | 1993-03-03 | 2002-10-21 | 千代田化工建設株式会社 | Manufacturing method of high purity white gypsum |
| US6159380A (en) * | 1994-07-26 | 2000-12-12 | Container-Care International, Inc. | Water treatment process |
| CN1597069A (en) * | 2004-08-27 | 2005-03-23 | 北京国电龙源环保工程有限公司 | By product gymsum continuous dehydration method and device in smoke desulfurization process |
| JP2008062208A (en) * | 2006-09-11 | 2008-03-21 | Chugoku Electric Power Co Inc:The | Precipitation tank of desulfurized gypsum, and precipitation method of desulfurized gypsum |
| CN101397148A (en) * | 2007-09-24 | 2009-04-01 | 宝山钢铁股份有限公司 | Purification method of sintered flue gas desulfurization gypsum |
| CN202657976U (en) * | 2012-04-18 | 2013-01-09 | 浙江天蓝环保技术股份有限公司 | Device for removing impurity by separation of carbide slag desulfurized gypsum slurry |
Cited By (12)
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|---|---|---|---|---|
| CN104436854A (en) * | 2014-12-12 | 2015-03-25 | 四川达竹煤电（集团）有限责任公司石板选煤发电厂 | Slime water serial treatment system and slime water serial treatment process |
| CN104722136A (en) * | 2015-03-12 | 2015-06-24 | 刘国忠 | Process and device for separating flue gas desulfurization gypsum slurry through self operation |
| CN104722136B (en) * | 2015-03-12 | 2018-01-05 | 刘国忠 | The technique that self-operating separates desulfurated plaster slurries |
| CN104959018A (en) * | 2015-06-25 | 2015-10-07 | 浙江天蓝环保技术股份有限公司 | Device and method for redesulfuration with desulfurization ash |
| CN109276947A (en) * | 2018-11-13 | 2019-01-29 | 中国北方稀土（集团）高科技股份有限公司 | The device and method being separated by solid-liquid separation in carbonated rare earth continuous production |
| CN109467115A (en) * | 2018-12-06 | 2019-03-15 | 安徽华塑股份有限公司 | A kind of carbide slag desulfurized gypsum slurries separation, impurity removal technique |
| CN109467115B (en) * | 2018-12-06 | 2021-02-23 | 安徽华塑股份有限公司 | Separation and impurity removal process for carbide slag desulfurized gypsum slurry |
| CN112194163A (en) * | 2020-10-29 | 2021-01-08 | 西安热工研究院有限公司 | Desulfurization gypsum black surface layer removing system and method |
| CN112194163B (en) * | 2020-10-29 | 2024-01-23 | 西安热工研究院有限公司 | System and method for removing black surface layer of desulfurized gypsum |
| DE102021120914A1 (en) | 2021-06-09 | 2022-12-15 | Akw Apparate + Verfahren Gmbh | Process and arrangement for separating and dewatering fine grain |
| CN117427413A (en) * | 2023-12-20 | 2024-01-23 | 山西省交通规划勘察设计院有限公司 | Circulating type separation device for desulfurized gypsum slurry |
| CN117427413B (en) * | 2023-12-20 | 2024-03-01 | 山西省交通规划勘察设计院有限公司 | Circulating type separation device for desulfurized gypsum slurry |
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