CN102765741B - Separating and purifying device and method of white mud/carbide slag-gypsum process desulphurization gypsum slurry - Google Patents
Separating and purifying device and method of white mud/carbide slag-gypsum process desulphurization gypsum slurry Download PDFInfo
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Abstract
The invention discloses a separating and purifying device and method of white mud/carbide slag-gypsum process desulphurization gypsum slurry. The device comprises a first-stage separation tank separation device and a second-stage separation tank separation device, wherein the first-stage separation tank separation device and the second-stage separation tank separation device comprise agitation tanks and sedimentation tanks of which the bottom parts and middle parts are communicated with one another; the agitation tanks are provided with agitation blades, slurry pipes and circulating water pipes; slurry outlets are formed on the bottom parts of the agitation tanks; suspended liquid outlets are formed on the middle parts of the sedimentation tanks; and the slurry outlet of a first-stage sedimentation tank first-stage separation device is communicated with the slurry pipe of a second-stage sedimentation tank second-stage separation device. The device and method disclosed by the invention have the advantages that the characteristic of different sedimentation rates of gypsum granules and black suspended matters in the gypsum slurry is utilized, and the black suspended matters are removed from the gypsum slurry by a two-stage suspending and agitating sedimentation separation device, so that the moisture of the gypsum is guaranteed to be stable below 10%, the gypsum purity is higher than 90%, and the quality of the white mud/carbide slag-gypsum process desulphurization gypsum is effectively improved.
Description
Technical field
The present invention relates to flue gas desulfurization technique field, be specifically related to a kind of separation, impurity removal apparatus and method of white clay/acetylene sludge-gypsum process desulphurization gypsum slurries.
Background technology
With white clay/carbide slag, do in white clay/acetylene sludge-gypsum process flue gas desulfurization course of sweetening agent, water-insoluble impurity in white clay/carbide slag and from the constantly accumulation in absorption tower of the grey branch in flue gas, form particle diameter below 45 μ m, true density is at 1.5～1.8g/cm
3between black suspension mixture, be called for short black suspension thing.Black suspension thing is accumulated in gypsum slurries, has reduced the stability of desulfuration efficiency and desulphurization system.Black suspension thing is discharged and is entered after dewatering system with desulfurated plaster, due to hydrocyclone separation technology poor effect, during the dehydration of vacuum band filter, black suspension thing can stick in filter cloth, gypsum surface, make gypsum dehydration become difficult, gypsum purity reduces simultaneously, and quality declines.
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 vent pipe of desulfuration absorbing tower bottom is connected to the spraying plant on drying tower top through gypsum overboard pump, the first tributary pipe of former flue, booster fan through 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 smoke-uptake of desulfuration absorbing tower is connected with chimney.This device makes full use of former flue gas heat, with lower energy consumption, complete the dehydration of desulfurated plaster slurries, hydrocyclone and the vacuum belt machine of conventional dehydration system have been 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 white clay/carbide slag-gypsum wet sulfur removal technology, because black suspension impurity lock outlet capacity in the gypsum slurries of white clay/carbide slag sulfur removal technology is stronger, hot flue gas can not effectively be removed this part moisture, so this technique is not suitable for the dehydration of the gypsum slurries of white clay/carbide slag-gypsum wet sulfur removal technology.
Publication number is that the Chinese patent of CN102071587A discloses a kind of method of removing black colloid substances in papermaking white mud of flue gas desulfurization absorbent, this invention is carried out desulfurization pre-treatment to white clay, white clay is through changing the steps such as stock tank, vibratory screening apparatus, ultrasonic cleaning equipment, size-mixing tank, black jelly in white clay is discharged with rinse water overflow, and purity improves.With white clay after pre-treatment, make sweetening agent, gypsum qualitt improves.Publication number is that the Chinese patent of CN102351232A discloses a kind of technique of removing ferrosilicon in carbide slag slurries, the magnetic field that is 0.05-0.5T by magneticstrength after carbide slag slurry sieves, remove ferrosilicon particle wherein, reduce carbide slag desulfurization and produce the black impurity in desulfurated plaster, improve the quality of gypsum.Above-mentioned two kinds for the treatment of processs are all that sweetening agent is processed, and make it meet the requirement of flue gas desulfurization technique.But limited due to white clay/carbide slag pre-treating technology application, in white clay/acetylene sludge-gypsum process flue gas desulfurization technique, to apply lessly, in white clay/carbide slag, impurity affects problem to white clay/acetylene sludge-gypsum process flue gas desulphurization system and gypsum qualitt and still exists.
Summary of the invention
The invention provides a kind of separation, impurity removal apparatus and method of white clay/acetylene sludge-gypsum process desulphurization gypsum slurries, utilize gypsum particle and feature that in gypsum slurries, black suspension thing subsidence rate is different, adopt two-stage to suspend and stir black suspension thing in settling separation device removal gypsum slurries, guarantee that gypsum water ratio is stabilized in below 10%, gypsum purity is greater than 90%, effectively improves the quality of white clay/acetylene sludge-gypsum process desulphurization gypsum.
A separation, impurity removal device for white clay/acetylene sludge-gypsum process desulphurization gypsum slurries, comprises flash trapping stage device and secondary separation device, and described flash trapping stage device and secondary separation device include:
Steel basin and subsider that bottom and middle part are communicated with mutually;
Stirring rake, slurry pipe and circulating pipe are set in described steel basin, and described steel basin bottom is provided with slurries outlet;
Described subsider middle part is provided with suspension outlet;
The slurries outlet of described flash trapping stage device is communicated with the slurry pipe of described secondary separation device.
Because the foreign matter content of white clay/carbide slag is very high, in the gypsum slurries of white clay/acetylene sludge-gypsum process desulphurization technology, contain a lot of black suspension things, these black suspension thing particle diameters are in 0～45 μ m left and right, and settling velocity, not as gypsum, still still possesses certain settling character.Utilize the gypsum particle in gypsum slurries different with the subsidence rate of black suspension thing, by two-stage, stir settlement separate by the black suspension Impurity removal in gypsum slurries.
In flash trapping stage device, at the lower gypsum particle of low mixing speed (60-200rpm), be deposited to slurries bottom, black suspension thing is suspended in the black suspension of upper strata, because slurries are in whipped state, have part gypsum and enter black suspension approaching the interfacial position of black suspension, therefore subsider is set, upper strata black suspension after stirring is introduced in subsider, sedimentation again, makes to enter part gypsum particle in black suspension and again settles down and be back in the slurries of steel basin bottom.
The separated removal of black suspension thing of 70% left and right in the gypsum slurries of flash trapping stage device separation, underflow slurries are delivered in secondary separation device, simultaneously by circulating pipe delivery cycle water or process water, same, under low mixing speed (60-200rpm), gypsum and black suspension thing complete secondary separation, after separation finishes, in gypsum slurries, remaining 30% black suspension thing is separated removes, and underflow slurries are sent into the gypsum that dewaters to obtain in vacuum band filter.
Between described subsider and described steel basin bottom, by curve bend, be communicated with, inverted vacuum breaker is set in this curve bend.
Gravitate; the gypsum particle settling down in subsider can be in curve bend flows back to suspension steel basin very smoothly; but described steel basin and subsider bottom and middle part are all communicated with; impact is stressed; bottom tie point pressure is larger; when in subsider, liquid level reduces, slurries preferentially flow into subsider from bottom tie point.Therefore, in described curved bend pipeline section, inverted vacuum breaker is set, prevents adverse current, upper strata suspension overflow in steel basin is entered in subsider.
Between the middle part of described subsider and described steel basin, by inclination upflow tube, be communicated with, the entrance of described inclination upflow tube is communicated with steel basin, outlet is communicated with subsider, and entrance is higher than outlet.
The angle of described inclination upflow tube and vertical plane is 30～50 degree.
The distance of the entrance of described inclination upflow tube and steel basin bottom is 2/5～4/5 of steel basin diameter, and described suspension outlet is positioned at 10～30cm place, top of inclination upflow tube outlet.
In subsider, there is no stirring action, gypsum particle and black suspension thing all can sedimentations in subsider for the black suspension of having carried like this part gypsum particle, the black suspension that enters subsider from steel basin is tilted to current downflow, when entering subsider, below the outlet of inclination upflow tube, form turbulent flow, the turbulent flow forming in subsider can make sedimentation part black suspension thing Eddy diffusion rise and to enter inclination upflow tube outlet upper area, then from suspension outlet, discharge.
It is the gathering section of 5～45 ° that described subsider bottom has angle of inclination, and the height of this gatherings section is 1/10～1/5 of subsider height, and this draws in bottom section and is communicated with described curve bend upper end.The diameter of propeller blade of described stirring rake is 3/5～4/5 of steel basin diameter, with the distance of steel basin bottom be 5～20cm.Bottom slurries can fully be stirred.
Described slurry pipe forms concentric or eccentric structure with the stir shaft of stirring rake, and bottom outlet is positioned at 10～20cm place, blade top of stirring rake.
Reduce the interference of steel basin inner assembly to stirring rake blade, make black suspension separation surface steady, thereby reduce the content that approaches black suspension separation surface position gypsum.
Described stirring rake can be the model that is conducive to arbitrarily solid-liquid separation, can be two leaf oars, three leaf oars and other number of sheets oars.
Stirring rake is avoided in the bottom outlet of described circulating pipe, lower than the entrance of described inclination upflow tube, recirculated water can be mixed to greatest extent with described gypsum slurries.
The present invention is also provided with a suspension treatment trough, and described suspension treatment trough is communicated with the suspension outlet of flash trapping stage device and secondary separation device and the entrance of circulating pipe by pipeline respectively.In suspension treatment trough, the sedimentation of black suspension thing, the clear liquor of removing black suspension thing recycles as recirculated water.
But black suspension thing settling velocity is slow, in the recirculated water that makes to recycle, may contain the black suspension thing that part is not removed.Therefore, preferably, cylinder barrel shaped is arranged on described suspension treatment trough top, turbination is arranged in bottom, the stage casing of described suspension treatment trough cylinder barrel shaped is provided with 2～3 layers every stream baffle plate or conduit, the pipeline being communicated with described suspension outlet is positioned at described baffles or conduit below, and the pipeline being communicated with the entrance of described circulating pipe is positioned at the described top every stream baffle plate or conduit.
In black suspension treatment trough, black suspension thing, in every stream baffle plate or vessel layers below, slowly deposits, and finally from mud discharging mouth, discharges.Every stream baffle plate or vessel layers, black suspension thing is helped to settlement action, when black suspension is by when flowing baffle plate or conduit, black suspension thing settles down, and clear liquor enters every stream baffle plate or conduit top, as recirculated water, uses.
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, the some inclining tubes that comprise the back up pad of horizontal positioned and run through this back up pad, 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 that flows baffle plate and puts.
Described steel basin sidewall is provided with vision slit, and the upper end of described vision slit is higher than described inclination upflow tube entrance 10～15cm, and lower end is lower than described inclination upflow tube entrance 30～35cm.By vision slit, observe black suspension separation surface situation, when separation surface lower than inclination upflow tube entrance under along time, can regulate by increasing mixing speed, otherwise, as the same.
The present invention also provides a kind of separation, impurity removal method of white clay/acetylene sludge-gypsum process desulphurization gypsum slurries, comprising:
(1) described gypsum slurries is introduced in the steel basin of flash trapping stage device, stir layering, upper strata suspension overflow is entered in this grade of subsider, sedimentation again in subsider, the slurry reflux of subsider bottom is to steel basin, the suspension on top is flowed out by suspension outlet, and after separation finishes, the slurries of steel basin bottom are introduced in secondary separation device and carried out secondary separation;
(2) bottom slurries in the steel basin of flash trapping stage device are introduced in the steel basin of secondary separation device, in this steel basin, pass into recirculated water simultaneously, stir layering, upper strata suspension overflow is entered in this grade of subsider, sedimentation again in subsider, subsider bottom slurry reflux is to steel basin, and top suspension is flowed out by suspension outlet, after secondary separation finishes, the bottom slurries in steel basin are through the gypsum that dewaters to obtain.
Suspension sedimentation in subsider from described flash trapping stage device and secondary separation device is processed, as recirculated water, sent back in the steel basin of described flash trapping stage device and secondary separation device.
In described two-stage tripping device, mixing speed is 60-200rpm.Under this mixing speed, gypsum can fully be stirred, and is suspended in tripping device bottom, and the black suspension thing in gypsum rises to black suspension liquid layer, gypsum and the layering of black suspension thing, and layering is obvious.When mixing speed is during lower than 60rpm, separation unit bottoms has gypsum deposition, fully stirring and segregation.When mixing speed is during higher than 200rpm, bottom calcium plaster liquid layer raises, and black suspension liquid layer reduces, and gypsum and black suspension thing layered effect are poor.
Per-cent described in the present invention all refers to mass percent in the situation that there is no specified otherwise.
Beneficial effect of the present invention:
Existing gypsum slurry separation plant only includes a suspension steel basin or one-level hydrocyclone, and after separation finishes, or gypsum loss is serious, or the difficulty of the gypsum treatment after sedimentation, also easily causes separation efficiency low.The present invention arranges two-stage tripping device and carries out separation, can be to greatest extent that the black suspension impurity in gypsum slurries is separated, improve the purity of gypsum, and reduce the water ratio of gypsum.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the sectional view of tripping device of the present invention;
Fig. 3 is the vertical view of tripping device of the present invention;
Fig. 4 is the sectional view of suspension treatment trough of the present invention;
Fig. 5 is the structural representation of subsider in Fig. 2, curve bend and vacuum breaker part.
Embodiment
As shown in Figure 1, a kind of separation, impurity removal device of white clay/acetylene sludge-gypsum process desulphurization gypsum slurries, comprises flash trapping stage device 1, secondary separation device 2, vacuum band filter 3 and suspension treatment trough 4.
Flash trapping stage device 1 is identical with the structure of secondary separation device 2, as shown in Figures 2 and 3, comprises steel basin 102 and subsider 111 that bottom and middle part are communicated with mutually.
The middle part of steel basin 102 is communicated with by inclination upflow tube 110 with the middle part of subsider 111, the entrance of inclination upflow tube 110 is communicated with steel basin 102, and the distance apart from steel basin 102 bottoms is 3/5 of steel basin 102 diameters, the outlet of inclination upflow tube 110 is communicated with subsider 111, inclination upflow tube 110 is 45 degree with the angle of vertical plane, and entrance is higher than outlet.
20cm place higher than 110 outlets of inclination upflow tube on subsider 111 arranges suspension outlet 109, vision slit 112 is set on the sidewall of steel basin 102, the upper end of vision slit 112 higher than on inclination upflow tube 110 entrances along 15cm, lower end lower than under inclination upflow tube 110 outlet along 30cm.
The structure of suspension treatment trough 3 as shown in Figure 4, cylinder barrel shaped is arranged on top, and turbination is arranged in bottom, and cylinder barrel shaped Duan Zhongshe haves three layers every stream baffle plate 301, all insert every the below of stream swash plate 301 bottom of two sewer pipes 302, and obconic bottom arranges mud discharging mouth 303.
Every stream baffle plate 301, by carriage and two ends, be fixed on some on this carriage and form every flow, allly every flow, be parallel to each other and have the angle of 45 degree with vertical direction, adjacent two layers is put every flow mutually in angle of 45 degrees every stream baffle plate.
As shown in Figure 1, the outlet of the slurries of flash trapping stage device 1 is communicated with the entrance of the slurry pipe of secondary separation device 2 by pipeline, and the slurries outlet of secondary separation device 2 is communicated with the slurries entrance of vacuum band filter 3; The suspension outlet of flash trapping stage device 1 and secondary separation device 2 is communicated with the sewer pipe 302 of suspension treatment trough 3 respectively, the circulating pipe of flash trapping stage device 1 and secondary separation device 2 respectively by pipeline be communicated to suspension treatment trough 3 every flowing swash plate 301 tops.
Between vacuum band filter 4 and suspension treatment trough 3, be also provided with pipeline and be communicated with, the waste liquid in vacuum band filter 4 is sent back in suspension treatment trough 3 and processed, in secondary separation device 2, also have additional technique water pipe, the deficiency of replenishment cycles water.
Technical process of the present invention is as follows:
Gypsum slurries A from white clay/acetylene sludge-gypsum process desulphurization technology, delivers to flash trapping stage device 1 by slurry pipe, opens and stirs, and mixing speed 60～200rpm, makes gypsum slurries in suspension stratification state.Continue to carry gypsum slurries, when gypsum slurries liquid level reaches inclination upflow tube entrance, continue to increase calcium plaster liquid measure.Afterwards, by vision slit, observe layering situation and the interfacial position of gypsum slurries, suitably adjust mixing speed.When the gypsum slurries liquid level in steel basin is 1.2～1.5 times of steel basin diameter, open the valve that this grade of tripping device slurries outlet and suspension export, the slurries outflow of taking advantage of a situation, enters respectively in suspension treatment trough 3 and secondary separation device 2.
The process water that has in advance 1/2 height in secondary separation device 2, after gypsum slurries enters, opens and stirs, and opens the process water at secondary separation device place simultaneously.Other operations are with flash trapping stage device 1, when the gypsum slurries liquid level in steel basin is 1.2～1.5 times of steel basin diameter, open the valve that the outlet of this grade of tripping device slurries and suspension export, the slurries outflow of taking advantage of a situation, enters respectively in suspension treatment trough 3 and vacuum band filter 4.
Black suspension from suspension outlet enters suspension treatment trough 3, in suspension treatment trough 3, sewer pipe 302 is vertical inserts 3 layers every flowing baffle plate below 301, black suspension thing deposits in suspension treatment trough 3, form with flocs unit is deposited in mud discharging mouth 303, open mud discharging mouth 303, discharge black suspension thing B.By the clear liquor of having clarified every stream baffle plate 301, as recirculated water, send in two-stage tripping device and recycle.
Gypsum slurries from secondary separation device 2 dewaters on vacuum band filter 4, gypsum tailings C after having dewatered enters gypsum stacking place, then outward transport is processed or recycling, and part filtrate is delivered to the interior storage of suspension treatment trough 3 by vacuum band filter filtrate line, and part filtrate is arranged outward.
While having enough clear liquors in suspension treatment trough 3, the process water of closing secondary separation device place, ON cycle water.When recirculated water is not enough, can opens the process water D at suspension treatment trough 3 places or again open the process water at secondary separation device place.
When slurries enter flash trapping stage device 1 from thionizer, serum density is moderate, generally do not need to pass into recirculated water, gypsum slurries completes flash liberation in flash trapping stage device 1, while entering secondary separation device 2, because gypsum slurries has passed through one-level, concentrates, need in secondary separation device 2, to pass into recirculated water or process water continuously, reduce the concentration of gypsum slurries, make black suspension thing with floating entering in black suspension waterborne, finally from the slurries outlet of secondary separation device, discharge.
In slurries, black suspension substrate concentration is not high, or when in gypsum, black suspension thing content requirement is not high, can not enable secondary separation device, now can open the recirculated water of flash trapping stage device, make recirculated water produce certain washing action to gypsum slurries, the separation efficiency of suitable increase flash trapping stage device.When recirculated water is not enough, can open the process water D at suspension treatment trough 3 places.In the continuous agitation of stirring rake, the black suspension thing in gypsum constantly floats, and finally from slurries outlet, discharges.
When not opening secondary separation device 2, the outlet of the slurries of flash trapping stage device 1 is directly connected with vacuum band filter 4 by pipeline, and gypsum dehydration is discharged.
From the gypsum slurries A of white clay-gypsum sulfur removal technology, serum density 1.13g/cm
3, solid content 26%, adopts said apparatus and technique separation, impurity removal, and wherein the mixing speed of flash trapping stage device is 90rpm, and the mixing speed of secondary separation device is 90rpm, gained gypsum C water ratio 8.13%, purity 94.9%, black suspension thing content 0.31%.
From the gypsum slurries A of white clay-gypsum sulfur removal technology, serum density 1.08g/cm
3, solid content 20%, adopts said apparatus and technique, only open flash trapping stage device, while ON cycle water or process water, wherein the mixing speed of flash trapping stage device is 90rpm, gained gypsum C water ratio 10.59%, purity 91.3%, black suspension thing content 2.03%.
From the gypsum slurries A of acetylene sludge-gypsum process desulphurization technology, serum density 1.08g/cm
3, solid content 20%, adopts said apparatus and technique separation, impurity removal, and wherein the mixing speed of flash trapping stage device is 90rpm, and the mixing speed of secondary separation device is 90rpm, gained gypsum C water ratio 9.76%, purity 92.7%, black suspension thing content 0.65%.
From the gypsum slurries A of acetylene sludge-gypsum process desulphurization technology, serum density 1.13g/cm
3, solid content 26%, adopts said apparatus and technique, only open flash trapping stage device, while ON cycle water or process water, wherein the mixing speed of flash trapping stage device is 90rpm, gained gypsum C water ratio 12.02%, purity 88.5%, black suspension thing content 2.85%.
Claims (5)
1. a separation, impurity removal device for white clay/acetylene sludge-gypsum process desulphurization gypsum slurries, comprises flash trapping stage device and secondary separation device, it is characterized in that,
Described flash trapping stage device and secondary separation device include:
Steel basin (102) and subsider (111) that bottom and middle part are communicated with mutually;
Stirring rake (105), slurry pipe (103) and circulating pipe (101) are set in described steel basin (102), and described steel basin (102) bottom is provided with slurries outlets (106);
Described subsider (111) middle part is provided with suspension outlet (109);
The slurries outlet of described flash trapping stage device is communicated with the slurry pipe of described secondary separation device;
Described subsider (111) and described steel basin (102) are communicated with by curve bend (108) between bottom, and inverted vacuum breaker (107) is set in this curve bend (108);
Between the middle part of described subsider (111) and described steel basin (102), by inclination upflow tube (110), be communicated with, the entrance of described inclination upflow tube (110) is communicated with steel basin (102), outlet is communicated with subsider (111), and described entrance is higher than outlet;
The distance of the entrance of described inclination upflow tube (110) and steel basin (102) bottom is 2/5～4/5 of steel basin (102) diameter, and described suspension outlet (109) is positioned at 10～30cm place, top of inclination upflow tube (110) outlet.
2. separation, impurity removal device according to claim 1, is characterized in that, the diameter of propeller blade of described stirring rake (105) is 1/2～4/5 of steel basin (102) diameter, with the distance of steel basin (102) bottom be 5～20cm.
3. separation, impurity removal device according to claim 2, it is characterized in that, it is the gathering section of 5～45 ° that described subsider (111) bottom has angle of inclination, and the height of this gatherings section is 1/10～1/5 of subsider height, and this draws in bottom section and is communicated with described curve bend upper end.
4. separation, impurity removal device according to claim 3, is characterized in that, described slurry pipe (103) forms concentric or eccentric structure with the stir shaft of stirring rake (105), and bottom outlet is positioned at 10～20cm place, blade top of stirring rake (105).
5. according to the separation, impurity removal device described in the arbitrary claim of claim 1～4, it is characterized in that, also be provided with a suspension treatment trough (3), described suspension treatment trough (3) is communicated with the suspension outlet of flash trapping stage device and secondary separation device and the entrance of circulating pipe by pipeline respectively.
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| CN201210248145.4A CN102765741B (en) | 2012-07-18 | 2012-07-18 | Separating and purifying device and method of white mud/carbide slag-gypsum process desulphurization gypsum slurry |
| CN201310710481.0A CN103803627B (en) | 2012-07-18 | 2012-07-18 | Separation and impurity removal method of white mud/calcium carbide residue-gypsum process based desulfurization gypsum slurry |
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| CN104107832B (en) * | 2014-07-04 | 2016-09-07 | 鹿寨县科凯贸易有限公司 | A kind of processing method of pulp mill white clay industrial residue |
| 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 |
| CN110510651A (en) * | 2019-08-13 | 2019-11-29 | 昆明川金诺化工股份有限公司 | The method and device thereof of atrament in a kind of abjection ardealite |
| CN114108352B (en) * | 2021-11-25 | 2022-09-30 | 华电渠东发电有限公司 | Papermaking white mud pretreatment system and treatment method for wet desulphurization |
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| FI120819B (en) * | 2008-04-09 | 2010-03-31 | Kemira Oyj | Procedure for cleaning plaster |
| CN201644205U (en) * | 2010-04-23 | 2010-11-24 | 中国恩菲工程技术有限公司 | Solid-solid separation device |
| CN202754811U (en) * | 2012-07-18 | 2013-02-27 | 浙江天蓝环保技术股份有限公司 | Separation impurity-removing device of white mud/ carbide slag-ypsum process desulfuration gypsum slurry |
-
2012
- 2012-07-18 CN CN201210248145.4A patent/CN102765741B/en active Active
- 2012-07-18 CN CN201310710481.0A patent/CN103803627B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN103803627A (en) | 2014-05-21 |
| CN102765741A (en) | 2012-11-07 |
| CN103803627B (en) | 2015-07-08 |
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