CN102631811B - 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
- Publication number
- CN102631811B CN102631811B CN201210114654.8A CN201210114654A CN102631811B CN 102631811 B CN102631811 B CN 102631811B CN 201210114654 A CN201210114654 A CN 201210114654A CN 102631811 B CN102631811 B CN 102631811B
- Authority
- CN
- China
- Prior art keywords
- slurries
- subsider
- grade subsides
- gypsum
- carbide slag
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
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 flue gas desulfurization technique field, be specifically related to a kind of apparatus and method of carbide slag desulfurated plaster slurries separation, impurity removal.
Background technology
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, utilize the alkaline trade wastes such as carbide slag to carry out flue gas desulfurization in the majority with wet method, adopt carbide slag significant for reducing flue gas desulfurization operating cost, the treatment of wastes with processes of wastes against one another, protection of the environment as desulfurizing agent.
Publication number is that the Chinese patent literature of CN101642674A discloses the pretreated wet fuel gas desulfurizing technology of a kind of carbide slag slurry, using carbide slag slurry as desulfurizing agent, flue gas is carried out to wet desulphurization processing, in carbide slag slurry, add 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 smoke-gas wet desulfurization processing.Publication number is that the Chinese patent literature of CN101816891A discloses the pretreated ozonation and wet-method flue gas desulphurization process of a kind of carbide slag, using carbide slag as desulfurizing agent, flue gas is carried out to wet desulphurization, in calcium carbide scorification slag process, pass into the gaseous mixture of ozone and oxygen, carry out oxidation reaction, and then with oxidation after carbide slag slurry flue gas is carried out to wet desulphurization processing.Above-mentioned two kinds of sulfur removal technologies are all take carbide slag as desulfurizing agent, by being used for after carbide slag slurry oxidation pre-treatment that flue gas is carried out to sulfur removal technology processing, reach the object of the treatment of wastes with processes of wastes against one another, economic environmental protection.But due to 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 gypsum dehydration performance is bad, and in final gypsum patty will, moisture content is very high.
Carbide slag is the wet trade waste of a large amount of discharges in preparation of ethyne by carbide process, contains the more impurity that process upstream section is brought into that comes from.Ash in partial impurities and flue gas grades and constantly accumulates in absorption tower, 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 hydrocyclone separation technology, this material of part returns to absorption tower through top stream, and part together enters vacuum band filter with gypsum, verify this black suspension impurity particle diameter and be less than gypsum, hydrocyclone is difficult to separate, and adhesion is larger simultaneously, is easy to be adsorbed in gypsum surface, stop up the hydrophobic duct of gypsum,,, be to affect vacuum band filter gypsum moisture content 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, side 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 gypsum excavationg pump, the first tributary pipe of former flue, through the booster fan of series connection, parget water sub-controller or smoke distributor are communicated to the mouth that enters of drying tower bottom, drying tower bottom is provided with gypsum displacer, the second tributary manifold of the pipe of drying tower and former flue closes, and be communicated to the mouth that enters of desulfuration absorbing tower, the smokejack of desulfuration absorbing tower is connected with chimney.This device makes full use of former flue gas heat, complete the dehydration of desulfurated plaster slurries with lower energy consumption, hydrocyclone and the vacuum belt of conventional dehydration system are saved, be applicable to the gypsum dehydration technique of wet desulfurization of flue gas by limestone-gypsum method technique, if the gypsum slurries dehydration by this technique for carbide slag-gypsum wet sulfur removal technology, because black suspension impurity in the gypsum slurries of carbide slag sulfur removal technology is stronger to the adsorption capacity of Free water, hot flue gas can not effectively be removed this part moisture, so this technique is inapplicable and the dehydration of the gypsum slurries of carbide slag-gypsum wet sulfur removal technology.
Summary of the invention
The invention provides a kind of apparatus and method of carbide slag desulfurated plaster slurries separation, impurity removal, utilize gypsum particle and feature that in carbide slag gypsum slurries, black suspension impurity sedimentation speed is different, adopt secondary sedimentation to remove black suspension impurity in carbide slag gypsum, guarantee that gypsum moisture content is stabilized in below 10%, simultaneously Ca (OH) in slurries
2, CaCO
3also there is good removal effect Deng the less desulfurizing agent of particle etc., effectively improve the quality of carbide slag desulfurated plaster.
A device for carbide slag desulfurated plaster slurries separation, impurity removal, comprises hydrocyclone and vacuum band filter, also comprises 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 entrance, circulating water outlet and the first slurries entrance, and the first described slurries entrance is communicated with described hydrocyclone bottom by pipeline; Described first grade subsides trench bottom is provided with the first slurries outlet; In described secondary subsider, be provided with fresh water (FW) technique water pipe, overfall and export with the first slurries the second slurries entrance being communicated with by pipeline; Described secondary subsider bottom is provided with the second slurries outlet being communicated with the slurries entrance of vacuum band filter by pipeline.
The gypsum slurries of carbide slag desulfurization enters in hydrocyclone through gypsum pumping, top stream after cyclonic separation continues to return desulfurizing tower, underflow slurries are sent in first grade subsides groove, start the paddle in first grade subsides groove, simultaneously by recirculated water entrance and exit to delivery cycle water in first grade subsides groove, gypsum particle in gypsum slurries is different with the rate of settling of black suspension impurity, sink in the slurries of bottom at the lower gypsum particle of low mixing speed (60～150 turn/min), black suspension impurity in gypsum slurries floats in supernatant liquid, and along with recirculated water flows out, after sedimentation finishes, in gypsum slurries, the black suspension impurity of 70% left and right is recycled water and takes away, underflow slurries are delivered in secondary subsider, start the paddle in secondary subsider, simultaneously by technique water pipe to delivery technology water in secondary subsider, same, sink down in lower floor's slurries at the lower gypsum particle of low mixing speed (60～150 turn/min), black suspension impurity remaining in gypsum slurries disperses into fresh water (FW) to floating, and along with fresh water (FW) flows out, the black suspension impurity of 30% left and right of remainder is separated and removed, after sedimentation finishes, underflow slurries are sent in vacuum band filter and dewatered.
General subsider or the bottom of agitator tank and outer wall junction are all at an angle of 90, the easily corner at bottom and outer wall that arranges like this forms stirring dead angle, also be unfavorable for the smooth discharge of slurries simultaneously, so as the preferred technical scheme of one of the present invention, it is the gathering section of 45～50 ° that the bottom of described first grade subsides groove and secondary subsider has angle of inclination, and the height of described gathering section is 1/6～1/5 of place subsider height.
Due to the special nature of carbide slag, in the gypsum slurries of carbide slag sulfur removal technology, contain a lot of black suspension impurity, these black suspension impurity particle diameters are in 0～5 μ m left and right, sinking speed is not as gypsum, but still possesses certain settling character, hydraulic cyclone can not be removed, so the present invention is provided with two-stage subsider, paddle is set in subsider, pass through successively the sedimentation separation of two-stage subsider from hydrocyclone underflow slurries out, due in whipping process, gypsum particle in slurries sinks, the slurries that contain a large amount of gypsum particles are mainly positioned at the bottom of subsider, in order to make slurries be stirred fully, 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 be stirred fully, as the preferred technical scheme of one, the first described slurries outlet and the outlet of the second slurries are all positioned at the gathering section of place subsider, described paddle is provided with upper and lower two groups of blades.
Upper blade is positioned at apart from 1/3～2/5 place, place groove subsider bottom, lower blade is positioned at the gathering section of subsider bottom, place, apart from subsider bottom 10～20cm, the slurries that subsider middle and lower part gypsum particle content is higher so all can be stirred fully, black suspension impurity in slurries just can better be separated, while going out oar after sedimentation finishes, because grout outlet has the stirring action of lower 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 upper blade is two, lower blade is four, be straight oblique 45 ° of blades, because lower blade is near slurries exit, lower blade is set to 4, under equal mixing speed, can strengthen stirring dynamics, prevent the deposition of slurries in subsider bottom, slurries can be discharged from slurries outlet more smoothly.
Slurries are in first grade subsides groove when sedimentation, continuous passes into recirculated water in first grade subsides groove, recirculated water is inputted from recirculated water entrance, circulating water outlet is discharged, in the continuous whipping process of paddle, gypsum particle in slurries sinks, black suspension impurity is toward floating, disperse in the recirculated water on top, and along with recirculated water flows out, first grade subsides groove is in the time of normal work, the gypsum slurries of bottom and the black suspension interface on top are at 1/2～2/3 place apart from bottom, so for the removal of impurities that makes recirculated water can participate in better slurries separates and swimmingly the black suspension impurity in slurries is taken out of, as the preferred technical scheme of one of the present invention, the distance of described recirculated water entrance and first grade subsides trench bottom is 3/4～5/6 of first grade subsides groove height, be preferably 5/6 of first grade subsides groove height, the distance of described circulating water outlet and first grade subsides trench bottom is 2/3～3/4 of first grade subsides groove height, is preferably 2/3 of first grade subsides groove height.
In gypsum slurries, the black suspension impurity of 70% left and right is all removed in first grade subsides groove, part black suspension impurity may overstock in gypsic horizon, so, as a preferred technical solution of the present invention, the delivery port of described technique water pipe is positioned at the below of blade, preferably, be positioned at 20～50cm place, below, the grout outlet of the pipeline of described connection the second slurries entrance is positioned at 10～20cm place, top of blade.By technique 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, in the time that sending secondary subsider to, the underflow slurries from first grade subsides groove are just subject to like this mixing power from below technique buoyancy of water and paddle simultaneously, the black suspension impurity overstocking in gypsic horizon just can better disperse in slurries under double action, under stirring action, gypsum particle sinks, black suspension impurity is to floating, flow out from overfall with fresh water (FW), in gypsum slurries after secondary sedimentation, black impurity can be removed thoroughly, finally deliver in vacuum band filter and dewater, can obtain the desulfurated plaster of moisture content below 10%.
When secondary subsider is normally worked, in order to make gypsum particle can separate better with black suspension impurity, as the preferred technical scheme of one, in secondary subsider, be provided with and be positioned at 2～3 layers of overfall below every stream baffle plate or conduit, described overfall is 3/4～5/6 of secondary subsider height with the distance bottom secondary subsider.Described be set to be parallel to each other every stream baffle plate some every flow, and there are the angles of 30～60 degree with vertical direction, and be provided with carriage, all two ends every flow are all fixed on this carriage.Described conduit, comprises the gripper shoe of horizontal positioned and runs through some inclining tubes of this gripper shoe, and all inclining tubes are parallel to each other and have 30～60 angles of spending with vertical direction.Adjacent two layers is mutually 30～60 degree angles every the inclining tube every flow or adjacent two layers conduit of stream baffle plate and puts.In whipping process, may have the gypsum particle of part along with the stirring of paddle enters in the black suspension of upper strata, flow out with fresh water (FW), like this certainly will be for causing the decline of gypsum output, arrange every stream baffle plate or conduit, just gypsum particle can be kept off below, only allow black suspension to pass through, flow out with fresh water (FW).When secondary subsider is normally worked, the interface of lower floor's slurries and upper strata suspension should, above upper blade, every the below of stream baffle plate or conduit, roughly be positioned at 1/2～2/3 At The Height of secondary subsider.
For the recirculated water and the fresh water (FW) that make to flow out in first grade subsides groove and secondary subsider can be fully utilized, the present invention is also provided with a dashpot, and described dashpot is communicated with respectively with recirculated water entrance, circulating water outlet and overfall.By in first grade subsides groove and secondary subsider come water outlet in dashpot after simple process, continue to return in first grade subsides groove and circulate, water resource can be used more effectively.
In order to make can to carry out eaily preliminary sedimentation processing from the water outlet of first grade subsides groove and secondary subsider, return in first grade subsides groove and recycle, as the preferred technical scheme of one, cylinder barrel shaped is arranged on described dashpot top, turbination is arranged in bottom, in described cylindrical drum, middle part is provided with every stream baffle plate or conduit (should be consistent with the structure in secondary subsider every stream baffle plate or conduit), the pipeline of communication loop water inlet be communicated with every stream baffle plate or conduit top, the pipeline of communication loop water out and overfall be communicated with every stream baffle plate or conduit below.Like this, water in dashpot passes through settlement action, black suspension impurity is mainly distributed in every stream baffle plate or below conduit, discharge by dashpot bottom, send Waste Water Treatment to, can meet the requirement of first grade subsides recirculated water every stream baffle plate or water more than conduit, continue to send in first grade subsides groove and recycle.
In infall process, need the slurries sedimentation situation in good time observation subsider, because the interface of two-stage subsider is all positioned at 1/2～2/3 At The Height of place subsider, so, as the preferred technical scheme of one, on described first grade subsides groove and secondary subsider outer wall, be equipped with peep hole, the distance of the top of described peep hole and place subsider bottom is 2/3 of subsider height, described peep hole be 1/2 of subsider height with the distance of place subsider bottom bottom.Can observe better more easily the sedimentation situation in subsider.
When making recirculated water send in first grade subsides groove, can more large-arealy contact with slurries, when discharge, can better discharge, described recirculated water entrance and circulating water outlet and pipeline connectivity part are set to flat taper shape, the outer wall of the flat conical one end opening part expanding and first grade subsides groove is tangent, 3～5 blocks of following current plates that recirculated water is divided equally are set in flat taper shape, the setting party of following current plate, to consistent with water (flow) direction, enters in first grade subsides groove after the recirculated water porch of first grade subsides groove is divided equally by following current plate from the recirculated water of dashpot.
For slurries can be contacted with recirculated water or the fresh water (FW) sent in subsider to greatest extent in whipping process, as the preferred technical scheme of one, in described secondary subsider, between the delivery port of technique water pipe, overfall and the second slurries entrance, be mutually 120 degree angles; In described first grade subsides groove, recirculated water entrance is just in time positioned at circulating water outlet the both sides that first grade subsides groove is relative.
The conveying of gypsum slurries between hydrocyclone, first grade subsides groove, secondary subsider and vacuum band filter can be implemented by the power of pump, also can be by the position relationship setting between them, make slurries because Action of Gravity Field is able to smooth delivery of power between them, therefore, as the preferred technical scheme of one of the present invention, described waterpower is revolved cyclone separator and is positioned at the top, and below sets gradually first grade subsides groove and secondary subsider and vacuum band filter.Like this, slurries just can be delivered to first grade subsides groove from hydrocyclone by its Action of Gravity Field, then send secondary subsider to from first grade subsides groove, finally send the dehydration of vacuum band filter to from secondary subsider, greatly reduce energy consumption, reduce the production cost of enterprise.
The bottom of described hydrocyclone is also provided with pipeline and is communicated with the slurries entrance of vacuum band filter.On the pipeline that is communicated with vacuum band filter and first grade subsides groove, be equipped with valve, in the time that gypsum slurries does not need to carry out two-stage sedimentation removal of impurities, can directly the underflow slurries of hydrocyclone be sent in vacuum band filter and be dewatered, therefore this dewatering process also can be used in the sulfur removal technologies such as limestone-gypsum method, gypsum slurries being dehydrated.According to the gypsum slurries requirement of different sulfur removal technologies, can adjust very easily device of the present invention, determine in fact to adopt Direct Dehydration still after two-stage sedimentation, to dewater, same set of device can adapt to the gypsum dehydration of different sulfur removal technologies, has reduced greatly the production cost of enterprise.In the time that first grade subsides groove and secondary subsider are not used in gypsum removal of impurities, can change mixing speed in addition, use it for desulfurizing agent stock tank, waste water storage tank etc., save fixed capital investment.
In order can be recycled the water that in vacuum band filter, gypsum is sloughed, the present invention is also provided with a tank, send in this tank from the filtered water of vacuum band filter, then, by the technique cross current of pipeline and secondary subsider, send in secondary subsider and recycle.
For gypsum slurries is stirred fully in first grade subsides groove, the grout outlet of the first described slurries entrance is positioned at 10～20cm place of the upper blade top of paddle.
As the preferred technical scheme of one, it is the gathering section of 45～50 ° that the bottom of described first grade subsides groove and secondary subsider has angle of inclination, the height of described gathering section is 1/6～1/5 of subsider height, the first described slurries outlet and the outlet of the second slurries are all positioned at the gathering section of place subsider, described paddle is provided with upper and lower two groups of blades, upper blade is all positioned at 1/3 At The Height of place subsider, the height of lower blade all exports in same level with the slurries of place subsider, described recirculated water entrance with described in dashpot, be communicated with every the top of stream baffle plate or conduit, described circulating water outlet and overfall with described in dashpot, be communicated with every stream baffle plate below.The gathering section setting of the setting of upper and lower blade and subsider bottom is stirred more fully slurries in the subsider of place, black suspension impurity can be separated to greatest extent, same blade at present and grout outlet are in same level, after sedimentation completes, bottom slurries go out oar in whipping process, slurries can not deposit in bottom, also can not stop up grout outlet; Two-stage subsider structure can effectively be removed the black suspension impurity in slurries, prepares higher-quality gypsum; Dashpot can make the water outlet of two-stage sedimentation be recycled, and greatly reduces the production cost of enterprise.
The present invention also provides a kind of method of carbide slag desulfurated plaster slurries separation, impurity removal, comprising:
By described gypsum slurries, after hydrocyclone separation technology, underflow slurries are introduced first grade subsides groove, stir and carry out first grade subsides, utilize recirculated water to remove upper strata suspended impurity while carrying out first grade subsides;
Underflow slurries after first grade subsides are introduced secondary subsider, secondary sedimentation is carried out in stirring, while carrying out secondary sedimentation, pass into the recycled process water for promoting that turbulent flow forms to secondary subsider, top after secondary sedimentation stream is discharged, and underflow slurries carry out the vacuum filtration gypsum that dewaters to obtain.
Be 30～100um from the particle diameter of particle in the gypsum slurries of carbide slag sulfur removal technology, the solid-liquid concentration of slurries is 10～70%.Due to the special nature of carbide slag, in gypsum slurries, there are a lot of black impurities, these impurity easily stick to gypsum particle surface, be difficult for removing, the present invention utilizes the rate of settling of gypsum particle and black impurity different, stirs the black impurity in gypsum slurries and unreacted Ca (OH) by two-stage
2remove Deng desulfurizing agent and the tiny gypsum of part particle, the gypsum after removal of impurities more easily dewaters.
As the preferred technical scheme of one, the mixing speed of described first grade subsides and secondary sedimentation is 60～150 turn/min.Under this mixing speed, black suspension impurity is with the motion floating of current, and the larger gypsum of density, particle is still in sedimentation state, and the gypsum particle in gypsum slurries can be good at separating with black impurity.When speed of agitator is greater than 150 turn/min, the gypsum particle that part particle diameter is relatively little also will float with current, will be unfavorable for the separation of black suspension impurity.
Said percentage equal mass percent in the situation that there is no specified otherwise in the present invention.
Beneficial effect of the present invention:
(1) after hydraulic cyclone technique, set up two-stage subsider, utilize the difference of gypsum and black suspension impurity sedimentation speed in carbide slag gypsum slurries, remove most of black suspension impurity in gypsum, also can effectively separate unreacted Ca (OH) in gypsum slurries simultaneously
2in desulfurizing agent and the tiny gypsum of part particle, improve gypsum purity, reduce gypsum moisture content etc.
(2), below the value that in gypsum, black suspension impurity content is lower, gypsum moisture content is stabilized in regulation time, can not enable this technique; The subsider relating in technique changes after speed of agitator, can be used as desulfurizing agent stock tank simultaneously, and waste water tank etc. are saved permanent plant investment.
(3) techniques such as gypsum is dried be can save, equipment investment, energy consumption reduced.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation of the groove of first grade subsides shown in Fig. 1;
Fig. 3 is the top view of the groove of first grade subsides shown in Fig. 2;
Fig. 4 is the structural representation of the subsider of secondary shown in Fig. 1;
Fig. 5 is the top view of the subsider of secondary shown in Fig. 4.
In figure, each Reference numeral is as follows:
1-hydrocyclone 2-first grade subsides groove 3-secondary subsider
4-dashpot 5-vacuum band filter 6-tank
201-paddle one 202-circulation fluid entrance 203-following current baffle plate
204-the first slurries entrance 205-peep hole one 206-circulation fluid outlet
207-the first slurries outlet 301-paddle two 302-are every stream baffle plate
303-technique water pipe 304-second slurries entrance 305-the second slurries outlet
306-overfall 307-peep hole two
The specific embodiment
As shown in Figure 1, a kind of device of carbide slag desulfurated plaster slurries separation, impurity removal, comprise hydrocyclone 1, first grade subsides groove 2, secondary subsider 3, dashpot 4, vacuum band filter 5 and tank 6, hydrocyclone 1 and vacuum band filter 5 directly adopt commercially available prod, and that in the present embodiment, adopt is the feed rate 57.36m that moral foundation environmental protection equipment Co., Ltd of Beijing China 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.
As Fig. 2, shown in Fig. 3, first grade subsides groove 2 adopts cylindrical groove, it is the gathering section of 45 ° that the bottom of this subsider has angle of inclination, the height that draws section in is 1/6 of this subsider height, the first slurries outlet 207 is set in the bottom of this subsider gathering section, the first slurries entrance 204 is set at the top of this subsider, in outer wall one side of this subsider and apart from base plate 5/6 At The Height, recirculated water entrance 202 is set, on the outer wall of a side relative with recirculated water entrance 202 and be positioned at this subsider 2/3 At The Height circulating water outlet 206 is set, recirculated water entrance 202 and circulating water outlet 206 are all arranged to flat taper shape with external pipeline connectivity part, flat conical one end of expanding is connected with the outer wall of this subsider, and the outer wall of opening part and this subsider is tangent, at recirculated water entrance, 202 places arrange following current baffle plate 202, following current baffle plate 202 is three vertical flat boards, dull and stereotyped place plane is consistent with the mobile direction of recirculated water, flat recirculated water entrance 202 taper shape is equally divided into 4 lattice, recirculated water enters in first grade subsides groove 2 after following current baffle plate 202 disperses.In the interior setting of first grade subsides groove 2 by motor-driven paddle 1, paddle 1 is provided with upper and lower two groups of blades, upper blade is positioned at apart from this 1/3 place, subsider bottom, be set to two, lower blade is arranged on the first slurries and exports on 207 same level faces, be set to four, upper and lower blade is all arranged to flat, and blade place plane and horizontal plane angle at 45 °.The pipeline that is communicated with the first slurries entrance 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, the shape of this peep hole 1 can arrange according to difference hobby, can be arranged to circle, rectangle, square etc., no matter be arranged to any shape, guarantee that the top of peep hole 1 is positioned at 2/3 At The Height of this subsider, be positioned at bottom 1/2 At The Height of this subsider, the size in hole is as the criterion with the Deposition Situation that can conveniently observe in subsider, in the present embodiment, this peep hole 1 is arranged to its length direction along the axial slot of this subsider, width is set to 15cm, the material of this peep hole 1 adopts the transparent materials such as lucite.
As shown in Figure 4, Figure 5, secondary subsider 3, also be cylindrical groove, its specification size, polycrystalline substance are consistent with first grade subsides groove 2, on this subsider outer wall and be positioned at this subsider 5/6 At The Height overfall 306 is set, it is identical that bottom is provided with the position of second setting position of slurries outlet 305, the second slurries outlets 305 and the first slurries outlet 207 of first grade subsides groove 3.
In secondary subsider 3, be provided with motor-driven paddle 2 301, this paddle is consistent with paddle 1 in first grade subsides groove 2, on this subsider outer wall, be provided with peep hole 2 307, position, the size etc. of the peep hole 1 on the outer wall of this peep hole and first grade subsides groove 2 are all consistent.
Interior near arranging 3 layers below overfall 306 every stream baffle plate 302 at secondary subsider 3, every layer of be set to be parallel to each other every stream baffle plate 302 some every flow, and this has the angle of 45 degree every flow place plane and vertical direction, and be provided with carriage, all two ends every flow are all fixed on this carriage, adjacent two layers is mutually 60 degree angles every stream baffle plate between flow, be provided with the second slurries entrance 304 at the top of this subsider, also be provided with to the technique water pipe 303 of this subsider bottom delivery technology water, the grout outlet that is communicated with the pipeline of the second slurries entrance 304 is positioned at 15cm place, blade top, technique water pipe 303 is close to subsider inwall and is goed deep in subsider, its delivery port arranges inclined-plane at 45 ° opening and is positioned at 30cm place, blade below.
The setting position of the second slurries entrance 304 and technique water pipe 303 is roughly the same, the setting position of technique water pipe 303, overfall 306 and the second grout outlet 305 is mutually hexagonal angle from the top view shown in Fig. 4, guarantees that slurries can contact to greatest extent with fresh water (FW).
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 of vacuum band filter 5, tank 6 is set.
The underflow outlet of hydrocyclone 1 arranges two-way pipeline, one tunnel is directly communicated with the slurries entrance of vacuum band filter 5, another road is communicated with the first slurries entrance 204, the first slurries outlet 207 is communicated with by pipeline the second slurries entrance 304, the second slurries outlets 207 are communicated with vacuum band filter 5 slurries entrance by pipeline; The device of vacuum band filter 5 splendid attire filtered water is communicated with tank 6 by pipeline, and tank 6 is communicated with the technique water pipe 303 of secondary subsider 3 by the pipeline with pump; Recirculated water entrance 202 is by pipeline and being communicated with every stream baffle plate top in dashpot 4, circulating water outlet 206 and overfall 306 are communicated with every stream baffle plate below by pipeline and dashpot 4, like this, water in dashpot passes through settlement action, black suspension impurity is mainly distributed in below stream baffle plate, discharges by dashpot 5 bottoms, delivers to Waste Water Treatment, water more than stream baffle plate can meet the requirement of first grade subsides recirculated water, continues to send in first grade subsides groove 2 to recycle.On all connecting pipelines, be equipped with valve.
Technological process of the present invention is as follows:
From the gypsum slurries A of carbide slag sulfur removal technology, deliver to and in hydrocyclone 1, carry out cyclonic separation, after cyclonic separation, top stream returns in sulfur removal technology and continues to circulate, underflow is delivered to the upper blade top 15cm of the paddle 1 in first grade subsides groove 2 from the first slurries entrance 204 through connecting pipeline, in first grade subsides groove 2, there is in advance the fresh water (FW) of 1/2 height, motor drives paddle 1 to stir slurries (turn 60～150/min of the rotating speed of paddle) in first grade subsides groove 2, simultaneously by dashpot 4, recirculated water entrance 202 and circulating water outlet 206 and connecting pipeline are realized flowing of recirculated water in first grade subsides groove 2.
Slurries in first grade subsides groove 2 are in the whipping process of paddle 1, gypsum particle is wherein because the rate of settling than black suspension impurity is fast, therefore be dispersed in lower floor's slurries, and black suspension impurity is because its rate of settling is slower, in whipping process, be suspended in supernatant liquid, and along with recirculated water flows out to dashpot, in dashpot, after preliminary sedimentation separation, continue to return in first grade subsides groove 2 and recycle, when liquid level of slurry 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 the first slurries outlet 207 in continuation whipping process, be delivered in secondary subsider 3 by pipeline.Regulate the amount that flows into, flows out into slurry, pulp, recirculated water, observe by peep hole 1, control bottom gypsum slurries and upper strata black suspension liquid interface apart from 1/2～2/3 place, first grade subsides groove 2 bottom, realize 2 continuous operations of first grade subsides groove.Sedimentation separation through first grade subsides groove 2 can be removed the black suspension impurity of 70% left and right in gypsum slurries, black impurity sedimentation separation in secondary subsider 3 of 30% remaining left and right.
Deliver to the upper blade top 15cm of paddle 2 301 from the second slurries entrance 304 through connecting pipeline from the underflow slurries of first grade subsides groove 2, start paddle 2 301 (turn 50～150/min of the rotating speed of paddle), from tank 6, in technique water pipe 303, pump into fresh water (FW) by pump simultaneously, fresh water (FW) D is delivered to 30cm place, upper blade below by technique water pipe 303, in secondary subsider 3, there is in advance the fresh water (FW) of 1/2 height, send into slurries in secondary subsider 3 under the acting in conjunction of the mixing power of technique buoyancy of water and paddle 2 301, the black suspension impurity overstocking in slurries in gypsic horizon disperses in fresh water (FW), and flow out from overfall 306 with fresh water (FW), regulate into slurry, pulp, fresh water (FW) influx, observe from peep hole 2 307, control bottom gypsum slurries and upper strata black suspension liquid interface apart from 1/2～2/3 place, secondary subsider 3 bottom, the black suspension liquid on upper strata is delivered in dashpot 4 through overfall 306, lower floor's slurries are under agitation discharged by the second grout outlet 305, deliver to the slurries entrance of vacuum band filter 5, after 5 dehydrations of vacuum band filter, obtain gypsum patty will C.
All send to dashpot 4 from circulating water outlet 206, overfall 306 water out, in dashpot 4, after plain sedimentation is processed, underflow B delivers to sewage disposal system, and supernatant liquid is delivered to circulation in first grade subsides groove 2.
Filtered water in vacuum band filter 1 is sent in tank 6 and is entered in secondary subsider 3 and recycle.
In the time that the black suspension impurity content in gypsum slurries is lower, can not start above-mentioned technique, directly the underflow slurries after hydrocyclone 1 separates are delivered to the dehydration of vacuum band filter.
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 technique separation, impurity removal, and wherein the rotating speed of paddle one is 100 turn/min, and the rotating speed of paddle two is 110 turn/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 technique separation, impurity removal, and wherein the rotating speed of paddle one is 80 turn/min, and the rotating speed of paddle two is 120 turn/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 technique separation, impurity removal, and wherein the rotating speed of paddle one is 80 turn/min, and the rotating speed of paddle two is 120 turn/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%, deliver to and in hydrocyclone 1, carry out cyclonic separation, after cyclonic separation, top stream returns in sulfur removal technology and continues to circulate, underflow obtains gypsum patty will C after connecting pipeline enters the dehydration of vacuum band filter, gypsum patty will C moisture content 17.25%, purity 91.13%, black suspension impurity content 3.17%.
Claims (5)
1. a device for carbide slag desulfurated plaster slurries separation, impurity removal, comprises hydrocyclone (1) and vacuum band filter (5), it is characterized in that, also comprises 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 entrance (202), circulating water outlet (206) and the first slurries entrance (204), and the first described slurries entrance (204) is communicated with described hydrocyclone (1) bottom by pipeline; Described first grade subsides groove (2) bottom is provided with the first slurries outlets (207); In described secondary subsider (3), be provided with technique water pipe (303), overfall (306) and export by pipeline and the first slurries the second slurries entrance (304) that (207) are communicated with; Described secondary subsider (3) bottom is provided with the second slurries outlets (305) that are communicated with the slurries entrance of vacuum band filter (5) by pipeline;
It is the gathering section of 45～50 ° that the bottom of described first grade subsides groove (2) and secondary subsider (3) has angle of inclination, and the height of described gathering section is 1/6～1/5 of place subsider height;
The first described slurries outlets (207) and the second slurries outlets (305) are all positioned at the gathering section of place subsider, and described paddle (201,301) is provided with upper and lower two groups of blades; Upper blade is positioned at apart from 1/3～2/5 place, place subsider bottom, and lower blade is positioned at the gathering section of subsider bottom, place, apart from subsider bottom 10～20cm;
Described recirculated water entrance (202) is 3/4～5/6 of first grade subsides groove (2) height with the distance of first grade subsides groove (2) bottom; Described circulating water outlet (206) is 2/3～3/4 of first grade subsides groove (2) height with the distance of first grade subsides groove (2) bottom;
The delivery port of described technique water pipe (303) is positioned at the below of blade, and the grout outlet of the pipeline of described connection the second slurries entrance (304) is positioned at 10～20cm place, top of blade.
2. a kind of device of carbide slag desulfurated plaster slurries separation, impurity removal according to claim 1, it is characterized in that, in secondary subsider (3), be provided with and be positioned at 2～3 layers of overfall (306) below every stream baffle plate or conduit (302), described overfall (306) is 3/4～5/6 of secondary subsider (3) height with the distance of secondary subsider (3) bottom.
3. according to the device of a kind of carbide slag desulfurated plaster slurries separation, impurity removal described in claim 1 or 2, it is characterized in that, also be provided with a dashpot (4), described dashpot (4) is communicated with respectively with recirculated water entrance (202), circulating water outlet (206) and overfall (306).
4. a kind of device of carbide slag desulfurated plaster slurries separation, impurity removal according to claim 3, it is characterized in that, on described first grade subsides groove (2) and secondary subsider (3) outer wall, be equipped with peep hole (205,307), the distance of the top of described peep hole (205,307) and place subsider bottom is 2/3 of subsider height, described peep hole (205,307) be 1/2 of subsider height with the distance of place subsider bottom bottom.
5. the method for a carbide slag desulfurated plaster slurries separation, impurity removal, it is characterized in that, by described gypsum slurries, after hydrocyclone separation technology, underflow slurries are introduced first grade subsides groove, first grade subsides is carried out in stirring, utilizes recirculated water to remove upper strata suspended impurity while carrying out first grade subsides; Underflow slurries after first grade subsides are introduced secondary subsider, secondary sedimentation is carried out in stirring, while carrying out secondary sedimentation, pass into the recycled process water for promoting that turbulent flow forms to secondary subsider, top after secondary sedimentation stream is discharged, and underflow slurries carry out the vacuum filtration gypsum that dewaters to obtain; The mixing speed of described first grade subsides and secondary sedimentation is 60～150 turn/min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210114654.8A CN102631811B (en) | 2012-04-18 | 2012-04-18 | Device and method for separating and removing impurities of carbide slag desulfurized gypsum slurry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210114654.8A CN102631811B (en) | 2012-04-18 | 2012-04-18 | Device and method for separating and removing impurities of carbide slag desulfurized gypsum slurry |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102631811A CN102631811A (en) | 2012-08-15 |
| CN102631811B true CN102631811B (en) | 2014-06-04 |
Family
ID=46616492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210114654.8A Active CN102631811B (en) | 2012-04-18 | 2012-04-18 | Device and method for separating and removing impurities of carbide slag desulfurized gypsum slurry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102631811B (en) |
Families Citing this family (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 |
| 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 |
| 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 |
| 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 |
| 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 |
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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102631811A (en) | 2012-08-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102631811B (en) | Device and method for separating and removing impurities of carbide slag desulfurized gypsum slurry | |
| CN1326594C (en) | Flume gas desulfuration method and composite circulated convection absorbing tower | |
| CN103408207B (en) | Integrated test device and method for dredging, dewatering and drying sludge in river and lake | |
| CN101284256B (en) | Technique for decarbonizing fly ash with high ignition loss | |
| CN104959018A (en) | Device and method for redesulfuration with desulfurization ash | |
| CN105000585B (en) | In ardealite and purification process technique | |
| CN203469801U (en) | Desulfurized ash-limestone mixing and slurrying device | |
| CN102553427A (en) | Process and device for flue gas wet desulphurization using carbide slag or white clay as desulfurizing agent | |
| CN212068336U (en) | White mud desulfurization system | |
| CN202657976U (en) | Device for removing impurity by separation of carbide slag desulfurized gypsum slurry | |
| CN105498981B (en) | A kind of high concrete carbon fly ash flotation with foam stabilizing feature takes off charcoal technique | |
| CN102765741B (en) | Separating and purifying device and method of white mud/carbide slag-gypsum process desulphurization gypsum slurry | |
| CN112456672A (en) | Mine water treatment method and system | |
| CN212504522U (en) | Oil-containing sludge advanced treatment equipment | |
| CN101798768A (en) | Waste paper regeneration environmental protection device and method | |
| CN106315652A (en) | Method of separation and purification of desulfurized gypsum and implementation thereof | |
| CN101481176A (en) | Water distribution apparatus and method for up-flow anaerobic sludge bed | |
| CN202729923U (en) | Backflow type high-efficiency air-dissolved air flotation device | |
| CN106495198A (en) | A kind of method that utilization hydrocyclone purifies ardealite | |
| CN214389555U (en) | System for recycling power plant water quality and purifying calcium-containing sludge | |
| CN202823268U (en) | Slurring device for white mud or acetylene sludge | |
| CN110204104B (en) | Suspension medium layer filtration system based on mechanical stirring layering | |
| CN112691523A (en) | System and method for recycling power plant water quality to purify calcium-containing sludge | |
| CN108178362B (en) | Limestone-gypsum desulfurization wastewater zero-emission treatment method and system | |
| CN206688889U (en) | Environment-friendly type tailing dry arranging device and processing system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |