CN107973330A - Alkaline residue supernatant and anhydrous sodium sulphate prepare calcium sulphate dihydrate, the device of strong brine and its production method - Google Patents
Alkaline residue supernatant and anhydrous sodium sulphate prepare calcium sulphate dihydrate, the device of strong brine and its production method Download PDFInfo
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- CN107973330A CN107973330A CN201711492329.4A CN201711492329A CN107973330A CN 107973330 A CN107973330 A CN 107973330A CN 201711492329 A CN201711492329 A CN 201711492329A CN 107973330 A CN107973330 A CN 107973330A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
- C01D3/06—Preparation by working up brines; seawater or spent lyes
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
- C01P2006/65—Chroma (C*)
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
- C01P2006/82—Compositional purity water content
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Abstract
The present invention relates to a kind of calcium sulphate dihydrate, the preparation facilities of strong brine and method, particularly a kind of alkaline residue supernatant and anhydrous sodium sulphate prepares calcium sulphate dihydrate, the device of strong brine and its production method.Dissolving bucket and supernatant liquid pump are connected by pipeline with reactor inlet respectively, and the outlet of reactor is connected by pipeline with slurries bucket, and the export pipeline of filtrate tank is connected with salt dissolving process and dissolving bucket entrance respectively.Anhydrous sodium sulphate forms metabisulfite solution after entering dissolving bucket, is admitted in reactor；Slurries are pumped through slurries, suspension separator is sent to band filter；Filtrate in filtrate knockout drum, discharges out of filtrate knockout drum, wash water knockout drum；Stored from the filtrate of filtrate knockout drum discharge through filtrate tank, filtrate pump conveying, go to other device areas to continue to use as wash water from the wash water of wash water knockout drum discharge.Any nucleation accelerating agent, chemical additives need not be added in reaction process, cost is lower.
Description
Technical field
The present invention relates to a kind of calcium sulphate dihydrate, the preparation facilities of strong brine and method, particularly a kind of alkaline residue supernatant
Calcium sulphate dihydrate, the device of strong brine and its production method are prepared with anhydrous sodium sulphate.
Background technology
Ammonia-soda process soda manufacture technique, which often produces 1 ton of soda ash, will produce 8~10m3Main component for calcium chloride, sodium chloride
And the evaporated waste ammonia liquid containing a small amount of alkaline residue solid particle, its handling problems is always global problem, traditional processing method one
As all be using cinder field precipitation-solid alkaline residue stockpiling-clear liquid it is up to standard system discharge.In order to further reduce discharge pressure, each ammonia alkali
Enterprise is almost provided with alkaline residue supernatant and prepares calcium chloride process, but by the shadow of the factors such as calcium chloride product recessed market
Ring, the utilization of capacity is relatively low, and supernatant treating capacity is minimum in overall quantum of output proportion, especially national environmental protection power in recent years
Degree is gradually increased, and the processing of alkaline residue supernatant and problem of complex utilization will the serious survival and development for restricting ammonia alkali enterprise.Member is bright
Accessory substance of the powder as industry, its market is narrow, cheap, and added value is not fully utilized.
At present, there are certain research, such as Ma Baoguo etc. in terms of calcium sulphate dihydrate is prepared using trade waste both at home and abroad
Patent disclosed in people《A kind of method that high-purity Dihydrate gypsum whiskers are prepared using industrial by-products calcium chloride》（CN
105671627 A）In, using industrial by-product slurry as raw material, nucleation accelerating agent, chemical additives are added, with technical grade sulfuric acid sodium
In hydrothermal condition（30~80 DEG C）Under it is agitated, insulation and etc.（Reaction time is 1~4h）Calcium sulphate dihydrate slurry is prepared,
The method need to add nucleation accelerating agent, chemical additives are bound to cause cost rise, and reaction process needs to heat, complex steps,
Reaction time is long, in addition, secondary the thing washings and strong brine that are produced in reaction process do not clearly state whereabouts, disposal is not
When secondary pollution etc. can be caused.
The content of the invention
Present invention seek to address that it is insufficient present in background technology, and a kind of alkaline residue supernatant and anhydrous sodium sulphate are provided and prepare two water sulphur
Sour calcium, the device of strong brine and its production method.
The device of the invention adopts the following technical scheme that：
A kind of alkaline residue supernatant and anhydrous sodium sulphate prepare the device of calcium sulphate dihydrate, strong brine, including dissolving bucket, reactor, suspension
Separator, band filter, slurries bucket, filtrate pump, wash water knockout drum, filtrate tank, filtrate knockout drum, slurries bucket, supernatant liquid pump, dissolving
Bucket and supernatant liquid pump are connected by pipeline with reactor inlet respectively, and the outlet of reactor is connected by pipeline with slurries bucket, slurry
The outlet of liquid bucket is connected by pipeline with suspension separator and with filter respectively, and two outlets of suspension separator pass through pipe respectively
Road is connected with filter and filtrate tank, and the outlet with filter is connected with wash water knockout drum and filtrate knockout drum respectively by pipeline,
The outlet of filtrate knockout drum is connected by pipeline with filtrate tank, the outlet of wash water knockout drum by pipeline respectively with filtrate tank and its
He connects wash water process；The export pipeline of filtrate tank is connected with salt dissolving process and dissolving bucket entrance respectively.
Device uses following preferred solution：
Dissolving bucket is pumped by metabisulfite solution and the entrance of pipeline and reactor connects, and supernatant liquid pump passes through pipeline and reactor
Entrance connects.
The outlet of slurries bucket is connected with suspension separator entrance and with filter entrance respectively by slurries pump.
Filtrate knockout drum is connected by pipeline with air compressor machine, and wash water knockout drum is connected by pipeline with air compressor machine；Filtrate point
It is connected from tank by pipeline with vacuum pump, wash water knockout drum is connected by pipeline with vacuum pump.
Production method adopts the following technical scheme that：
A kind of alkaline residue supernatant and anhydrous sodium sulphate prepare the production method of calcium sulphate dihydrate, strong brine, carry out as follows：
A, prepared by metabisulfite solution：
Anhydrous sodium sulphate from industrial by-product forms metabisulfite solution after entering dissolving bucket, is admitted in reactor；
B, crystallization reaction：
Metabisulfite solution is realized by lasting stirring in reactor with the alkaline residue supernatant that supernatant liquid pump conveys and mixed, and is occurred
Chemical reaction, forms the mixed serum of Crystallization of Gypsum and sodium chloride solution, slurries are pumped through slurries, suspension separator is sent to
Band filter；
C, filtration washing：
Vacuum pump is connected by filtrate knockout drum, wash water knockout drum and respective line with filter, and vacuum is provided for band filter,
Under vacuum condition, calcium sulphate dihydrate filter cake is retained by belt, and filtrate enters filtrate knockout drum by the hole of belt itself, real
The separation of solid and liquid of existing slurries；Wash water is uniformly sprayed on filter cake upper belt, in band filter under vacuum action, through filter cake
Layer, belt, into wash water knockout drum, realize that chlorine drops in the washing of calcium sulphate dihydrate filter cake；Filtrate in filtrate knockout drum, Yi Jixi
Wash water in water separation tank under the compressed air effect that air compressor machine produces, discontinuity from filtrate knockout drum, wash water knockout drum
Interior discharge；
D, the disposal of filtrate, wash water：
Stored from the filtrate of filtrate knockout drum discharge through filtrate tank, filtrate pump conveying, the filtrate for accounting for 45%~55% volume ratio returns
It is used to dissolve anhydrous sodium sulphate to dissolving bucket, remaining filtrate goes the salt dissolving process of soda manufacture system as product；From wash water knockout drum
The wash water of discharge goes to other device areas to continue to use as wash water.
Production method uses following preferred solution：
Anhydrous sodium sulphate used is thenardite or anhydrous slufuric acid sodium solution in step a, sodium sulphate matter in the metabisulfite solution of formation
It is 14%~17% to measure concentration；When the filtrate in by step d, which returns to dissolving bucket, forms circulation, then metabisulfite solution is dissolved by filtrate
Anhydrous sodium sulphate forms.
45~55 DEG C of reactor interior reaction temperature, Crystallization of Gypsum residence time about 30~60min in reactor,
Reactor speed of agitator is 6~80rpm；Crystallization of Gypsum mass content is 7%~8% in reactor discharge slurry, solution
Sodium chloride mass content is 10%~20%, and Crystallization of Gypsum content control is realized by controlling suspension separator to thicken treating capacity
System, and adjust raising band filter live load, filter efficiency；Calcium sulphate dihydrate filter cake moisture content is controlled below 25%, sodium chloride
Content is less than 0.07%.
Compared with prior art, the present invention have the advantages that：Any nucleation need not be added in reaction process to promote
It is lower into agent, chemical additives, cost；Hydro-thermal, heat tracing and insulation are not required in production process, one step of reaction is complete
Into operation is easier, and reaction is fast, efficient, energy consumption is small, cost is low；The strong brine that is more importantly produced in reaction process and
Washings are recycled for production system again, no secondary waste thing discharge, more environmentally-friendly, are breached ammonia alkali enterprise and are being administered alkaline residue
Technical bottleneck in terms of supernatant improvement；The Crystallization of Gypsum particle of preparation uniformly, beneficial to modification, whiteness reach 92% with
On, purity is more than 96%, product grade height, stable quality, excellent performance, can pass through dehumidification treatments and form calcium sulphate dihydrate production
Product, also can produce alpha type high-strength gypsum or β type gypsum products by deep processing, applied to ceramics, hot investment casting, medical, aviation,
The fields such as ship, automobile, plastics, building and industrial art.
Brief description of the drawings
Fig. 1 is the structure diagram of the present invention.
Embodiment
The present invention is stated with reference to the accompanying drawings and embodiments：
A kind of device that calcium sulphate dihydrate, strong brine are prepared using ammonia alkali alkaline residue supernatant and industrial by-product anhydrous sodium sulphate, referring to attached
Fig. 1, in figure：Dissolving bucket 1, metabisulfite solution pump 2, reactor 3, suspension separator 4, air compressor machine 5, band filter 6, vacuum pump 7,
Filtrate pump 8, wash water knockout drum 9, filtrate tank 10, filtrate knockout drum 11, slurries pump 12, slurries bucket 13, supernatant liquid pump 14.
In the present embodiment, dissolving bucket 1 and supernatant liquid pump 14 are connected by pipeline with 3 entrance of reactor respectively, reactor 3
Outlet is connected by pipeline with slurries bucket 13, and the outlet of slurries bucket 13 connects by pipeline with suspension separator 4 and with filter 6 respectively
Connect, two outlets of suspension separator 4 are connected by pipeline with filter 6 and filtrate tank 10 respectively, and the outlet with filter 6 passes through
Pipeline is connected with wash water knockout drum 9 and filtrate knockout drum 11 respectively, and the outlet of filtrate knockout drum 11 passes through pipeline and filtrate tank 10
Connection, the outlet of wash water knockout drum 9 is connected with filtrate tank 10 and other wash water processes respectively by pipeline；The outlet of filtrate tank 1
Pipeline is connected with salt dissolving process and 1 entrance of dissolving bucket respectively.
Dissolving bucket 1 is connected by metabisulfite solution pump 2 and pipeline with the entrance of reactor 3, and supernatant liquid pump, which leads to 14, crosses pipe
Road is connected with 3 entrance of reactor.
The outlet of slurries bucket 13 is connected with the entrance of suspension separator 4 and the entrance with filter 6 respectively by slurries pump 12.
Filtrate knockout drum 11 is connected by pipeline with air compressor machine 5, and wash water knockout drum 9 is connected by pipeline with air compressor machine 5；Filtrate knockout drum
11 are connected by pipeline with vacuum pump 7, and wash water knockout drum 9 is connected by pipeline with vacuum pump 7.
Wash water knockout drum 9 can be arranged to two or more according to actual needs.
Production method embodiment one：
It is a kind of using ammonia alkali alkaline residue supernatant and industrial by-product anhydrous sodium sulphate prepare calcium sulphate dihydrate, strong brine device producer
Method, carries out as follows：
First, prepared by metabisulfite solution：Formation metabisulfite solution is admitted to instead after anhydrous sodium sulphate from industrial by-product enters dissolving bucket 1
Answer in device 3；Sodium sulphate content about 1.1mol/L or so in metabisulfite solution.
2nd, crystallization reaction：Metabisulfite solution is interior by continuing in reactor 3 with the alkaline residue supernatant that supernatant liquid pump 14 conveys
Mixing is realized in stirring, and concurrent biochemical reaction, forms the mixed serum of Crystallization of Gypsum and sodium chloride solution, slurries are through slurry
Liquid pump 12, suspension separate 4 devices and are sent to band filter 6.
3rd, filtration washing：Vacuum pump 7 is by filtrate knockout drum 11, wash water knockout drum 9 and respective line with connecting with filter 6
It is logical, it is that band filter 6 provides vacuum, under vacuum, calcium sulphate dihydrate filter cake is retained by belt, and filtrate passes through belt itself
Hole enter filtrate knockout drum 11, realize the separation of solid and liquid of slurries；Wash water is uniformly sprayed on filter cake upper belt, is filtered in band
In machine 6 under vacuum action, through cake layer, belt, into wash water knockout drum 9, realize that chlorine drops in the washing of calcium sulphate dihydrate filter cake；
Wash water in filtrate in filtrate knockout drum 9, and wash water knockout drum 9 is under the compressed air effect that air compressor machine produces, interruption
Property from filtrate knockout drum 11, discharge in wash water knockout drum 9.
4th, the disposal of filtrate, wash water：The filtrate discharged from filtrate knockout drum 11 stores through filtrate tank 10, filtrate pump 8 is defeated
Send, the filtrate for accounting for 55% volume ratio is back to dissolving bucket 1 for dissolving anhydrous sodium sulphate, remaining filtrate goes to soda manufacture system as product
The salt dissolving process of system；The wash water discharged from wash water knockout drum 9 goes to other device areas to continue to use as wash water.
45~50 DEG C of reactor interior reaction temperature, Crystallization of Gypsum residence time about 60min in reactor, reaction
Device stirs（Paddle）Rotating speed is about 50~80rpm, and metabisulfite solution presses SO with alkaline residue supernatant addition4 2 -With Ca2+Molar ratio 1:
1 control；Crystallization of Gypsum mass content is 7% in reactor discharge slurry, and solution chlorination sodium mass content is 17%, is passed through
Control suspension separator thickening treating capacity realizes that Crystallization of Gypsum content controls, and adjust raising band filter live load,
Filter efficiency；Calcium sulphate dihydrate filter cake moisture content is controlled below 25%, and sodium chloride mass content is less than 0.07%.Can be according to not
The height with sodium chloride content in 6 wash water of filter come out with wash water knockout drum 9, and other device areas are to the wash water sodium chloride
The requirement of content is adjusted accordingly, and the high wash water of sodium chloride content can be mixed with filtrate, can also be low with sodium chloride content wash
Water mixes.
Production method embodiment two：
Fresh water or production by-product brine the dissolving chemical fibre accessory substance anhydrous sodium sulphate in dissolving bucket 1, are equipped to 1.35mol/L or so, 40
DEG C or so metabisulfite solution, metabisulfite solution 2 is sent to reactor 3 through metabisulfite solution pump；By SO4 2 -With Ca2+Molar ratio 1:1
60 DEG C or so of alkaline residue supernatant is added into reactor（CaCl2Mass content 10%, Ca2+1.125 mol/L or so）, two kinds
Liquid stirs reaction in reactor 3, stirring（Frame）6~9rpm of speed, 50~55 DEG C of reaction temperature, what reactor 3 produced
Crystallization of Gypsum residence time about 30min, forms the Crystallization of Gypsum of mass content 8% or so and containing 17% or so
The mixed serum of the solution of sodium chloride, mixed serum is introduced into slurries bucket 13, then is sent to band through slurries pump 12, suspension separator 4
Filter 6 carries out separation of solid and liquid, adjusts 6 wash water flow about 0.5m of band filter3/ t calcium sulphate dihydrates, 6 FREQUENCY CONTROL 10 of band filter~
15Hz, 30~50KPa of vacuum, obtain sodium chloride mass content less than 0.07%, the calcium sulphate dihydrate filter cake of moisture content 25%.
Band 6 washings of filter go other processes to recycle.2.5~3.5 are obtained after calcium sulphate dihydrate slurries separation of solid and liquid
The strong brine of mol/L after filtrate tank 10 collects, through filtrate pump 8 pressurization after, account for volume ratio 45% filtrate send it is molten to dissolving bucket 1
Anhydrous sodium sulphate is solved, remaining filtrate is sent to salt dissolving process, realizes whole recyclings of accessory substance.
Production method embodiment three：
Fresh water or production by-product brine the dissolving chemical fibre accessory substance anhydrous sodium sulphate in dissolving bucket 1, are equipped to 1.35mol/L or so, 40
DEG C or so metabisulfite solution, metabisulfite solution 2 is sent to reactor 3 through metabisulfite solution pump；By SO4 2 -With Ca2+Molar ratio 1:1
60 DEG C or so of alkaline residue supernatant is added into reactor（CaCl2Mass content 10%, Ca2+1.125 mol/L or so）, two kinds
Liquid stirs reaction in reactor 3, stirring（Frame）6~9rpm of speed, 5 DEG C of reaction temperature, the two water sulphur that reactor 3 produces
Sour calcium crystallizes residence time about 30min, forms the Crystallization of Gypsum of mass content 8% or so and containing 17% or so sodium chloride
Solution mixed serum, mixed serum is introduced into slurries bucket 13, then through slurries pump 12, suspension separator 4 be sent to band filter 6 into
Row separation of solid and liquid, adjusts 6 wash water flow about 0.5m of band filter3/ t calcium sulphate dihydrates, with 6 10~15Hz of FREQUENCY CONTROL of filter, very
30~50KPa of sky, obtains sodium chloride mass content less than 0.07%, the calcium sulphate dihydrate filter cake of moisture content 25%.
Band 6 washings of filter go other processes to recycle.3.5 mol/L are obtained after calcium sulphate dihydrate slurries separation of solid and liquid
Strong brine after filtrate tank 10 collects, through filtrate pump 8 pressurization after, account for volume ratio 45% filtrate send to dissolving bucket 1 dissolve member it is bright
Powder, remaining filtrate are sent to salt dissolving process, realize whole recyclings of accessory substance.
Those skilled in the art do not depart from the essence and spirit of the present invention, can have kinds of schemes to realize the present invention, the above
The interest field for being only the preferably feasible embodiment of the present invention, not thereby limiting to the present invention, it is all with the present invention
The equivalence changes that specification and accompanying drawing content are made, are both contained within the interest field of the present invention.
Claims (7)
1. a kind of alkaline residue supernatant and anhydrous sodium sulphate prepare the device of calcium sulphate dihydrate, strong brine, including dissolving bucket, reactor, hangs
Liquid/gas separator, band filter, slurries bucket, filtrate pump, wash water knockout drum, filtrate tank, filtrate knockout drum, slurries bucket, supernatant liquid pump, its
It is characterized in that：Dissolving bucket and supernatant liquid pump are connected by pipeline with reactor inlet respectively, the outlet of reactor by pipeline with
Slurries bucket connects, and the outlet of slurries bucket is connected by pipeline with suspension separator and with filter respectively, two of suspension separator
Outlet be connected respectively by pipeline with filter and filtrate tank, the outlet with filter by pipeline respectively with wash water knockout drum and filter
Liquid knockout drum connects, and the outlet of filtrate knockout drum is connected by pipeline with filtrate tank, and the outlet of wash water knockout drum passes through pipeline point
It is not connected with filtrate tank and other wash water processes；The export pipeline of filtrate tank is connected with salt dissolving process and dissolving bucket entrance respectively.
2. alkaline residue supernatant according to claim 1 and anhydrous sodium sulphate prepare the device of calcium sulphate dihydrate, strong brine, its feature
It is：Dissolving bucket is pumped by metabisulfite solution and the entrance of pipeline and reactor connects, and supernatant liquid pump passes through pipeline and reaction
Device entrance connects.
3. alkaline residue supernatant according to claim 1 and anhydrous sodium sulphate prepare the device of calcium sulphate dihydrate, strong brine, its feature
It is：The outlet of slurries bucket is connected with suspension separator entrance and with filter entrance respectively by slurries pump.
4. alkaline residue supernatant according to claim 1 and anhydrous sodium sulphate prepare the device of calcium sulphate dihydrate, strong brine, its feature
It is：Filtrate knockout drum is connected by pipeline with air compressor machine, and wash water knockout drum is connected by pipeline with air compressor machine；Filtrate knockout drum
It is connected by pipeline with vacuum pump, wash water knockout drum is connected by pipeline with vacuum pump.
5. a kind of alkaline residue supernatant and anhydrous sodium sulphate as described in any one in Claims 1-4 prepares calcium sulphate dihydrate, dense salt
The production method of water, carries out as follows：
A, prepared by metabisulfite solution：
Anhydrous sodium sulphate from industrial by-product forms metabisulfite solution after entering dissolving bucket, is admitted in reactor；
B, crystallization reaction：
Metabisulfite solution is realized by lasting stirring in reactor with the alkaline residue supernatant that supernatant liquid pump conveys and mixed, and is occurred
Chemical reaction, forms the mixed serum of Crystallization of Gypsum and sodium chloride solution, slurries are pumped through slurries, suspension separator is sent to
Band filter；
C, filtration washing：
Vacuum pump is connected by filtrate knockout drum, wash water knockout drum and respective line with filter, and vacuum is provided for band filter,
Under vacuum condition, calcium sulphate dihydrate filter cake is retained by belt, and filtrate enters filtrate knockout drum by the hole of belt itself, real
The separation of solid and liquid of existing slurries；Wash water is uniformly sprayed on filter cake upper belt, in band filter under vacuum action, through filter cake
Layer, belt, into wash water knockout drum, realize that chlorine drops in the washing of calcium sulphate dihydrate filter cake；Filtrate in filtrate knockout drum, Yi Jixi
Wash water in water separation tank under the compressed air effect that air compressor machine produces, discontinuity from filtrate knockout drum, wash water knockout drum
Interior discharge；
D, the disposal of filtrate, wash water：
Stored from the filtrate of filtrate knockout drum discharge through filtrate tank, filtrate pump conveying, the filtrate for accounting for 45%~55% volume ratio returns
It is used to dissolve anhydrous sodium sulphate to dissolving bucket, remaining filtrate goes the salt dissolving process of soda manufacture system as product；From wash water knockout drum
The wash water of discharge goes to other device areas to continue to use as wash water.
6. alkaline residue supernatant according to claim 5 and anhydrous sodium sulphate prepare the production method of calcium sulphate dihydrate, strong brine, its
It is characterized in that：Anhydrous sodium sulphate used is thenardite or anhydrous slufuric acid sodium solution in step a, sulfuric acid in the metabisulfite solution of formation
Sodium mass concentration is 14%~17%；When the filtrate in by step d, which returns to dissolving bucket, forms circulation, then metabisulfite solution is by filtrate
Dissolving anhydrous sodium sulphate forms.
7. alkaline residue supernatant according to claim 5 and anhydrous sodium sulphate prepare the production method of calcium sulphate dihydrate, strong brine, its
It is characterized in that：45~55 DEG C of reactor interior reaction temperature, Crystallization of Gypsum in reactor the residence time about 30~
60min, reactor speed of agitator are 6~80rpm；In reactor discharge slurry Crystallization of Gypsum mass content for 7%~
8%, solution chlorination sodium mass content is 10%~20%, and calcium sulphate dihydrate knot is realized by controlling suspension separator to thicken treating capacity
Brilliant content control, and adjust raising band filter live load, filter efficiency；Calcium sulphate dihydrate filter cake moisture content control 25% with
Under, sodium chloride content is less than 0.07%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109570186A (en) * | 2018-10-24 | 2019-04-05 | 湖北云应矿业技术开发有限公司 | A kind of reuse method of soda-manufacturing waste residue liquid and system using this method |
| CN111569559A (en) * | 2020-05-23 | 2020-08-25 | 河北化工医药职业技术学院 | Waste gas purification dust-free environment-friendly gas leakage monitoring system of dihydrate gypsum production line |
| CN115595665A (en) * | 2022-08-26 | 2023-01-13 | 关祥瑞（Cn） | Method and equipment for preparing calcium sulfate whiskers by using ammonia-soda alkaline residues |
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| CN1297847A (en) * | 2000-12-06 | 2001-06-06 | 化学工业部连云港设计研究院 | Comprehensive utilization method of waste ammonia sode liquid and sodium sulfate containing waste liquid |
| CN101367538A (en) * | 2008-10-09 | 2009-02-18 | 国家海洋局天津海水淡化与综合利用研究所 | Method for preparing calcium sulphate with sulfate containing bittern and calcium containing bittern |
| CN102351155A (en) * | 2011-07-12 | 2012-02-15 | 湖南恒光科技股份有限公司 | Alkali manufacturing technology for combined production of sulfuric acid and cement |
| CN104445337A (en) * | 2014-10-28 | 2015-03-25 | 广东南方碱业股份有限公司 | Method for preparing low-chloride gypsum by using ammonia-soda distillation waste liquid and brine |
| CN104894650A (en) * | 2015-05-31 | 2015-09-09 | 四川理工学院 | Method for preparing calcium sulfate dihydrate whisker from mirabilite and calcium water |
| CN205164294U (en) * | 2015-11-06 | 2016-04-20 | 安徽欣创节能环保科技股份有限公司 | A gypsum discharge system for desulphurization unit of sintering system |
| CN105502466A (en) * | 2016-02-19 | 2016-04-20 | 江苏一夫科技股份有限公司 | Method for preparing alpha high-strength gypsum from chlorine alkali industry cathode wastewater |
| CN106745153A (en) * | 2016-09-23 | 2017-05-31 | 封祁宁 | denitration gypsum cleaning device and method |
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| CN109570186A (en) * | 2018-10-24 | 2019-04-05 | 湖北云应矿业技术开发有限公司 | A kind of reuse method of soda-manufacturing waste residue liquid and system using this method |
| CN111569559A (en) * | 2020-05-23 | 2020-08-25 | 河北化工医药职业技术学院 | Waste gas purification dust-free environment-friendly gas leakage monitoring system of dihydrate gypsum production line |
| CN111569559B (en) * | 2020-05-23 | 2022-03-25 | 河北化工医药职业技术学院 | Waste gas purification dust-free environment-friendly gas leakage monitoring system of dihydrate gypsum production line |
| CN115595665A (en) * | 2022-08-26 | 2023-01-13 | 关祥瑞（Cn） | Method and equipment for preparing calcium sulfate whiskers by using ammonia-soda alkaline residues |
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