CN103693794A - Method for treating brine prepared through water dissolving and mining of underground sodium sulfate decahydrate - Google Patents
Method for treating brine prepared through water dissolving and mining of underground sodium sulfate decahydrate Download PDFInfo
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- CN103693794A CN103693794A CN201310676005.1A CN201310676005A CN103693794A CN 103693794 A CN103693794 A CN 103693794A CN 201310676005 A CN201310676005 A CN 201310676005A CN 103693794 A CN103693794 A CN 103693794A
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Abstract
The invention discloses a method for treating brine prepared through water dissolving and mining of underground sodium sultafe decahydrate. The method comprises the following steps: A, refining and purifying brine, namely, enabling the brine with the content of sodium sulfate of more than 20 percent and the temperature of 40-50 DEG C to pass through a gap clarifying tank, adding a water purifying agent, sodium carbonate and caustic soda for reaction to remove calcium and magnesium ions, flocculating and naturally clarifying, filtering through a precise filter to obtain refined brine; and B, removing fixed gas, namely, arranging a degassing tower on the top of a refined brine storage tank, circularly pumping to the middle-upper part of the degassing tower through a pump after preheating the refined brine through four-effect vacuum evaporation first-effect condensate with waste heat, spraying downwards, discharging non-condensable gas from the top of the tower, and repeatedly cycling to achieve the purpose of removing the non-condensable gas. The method has the main advantages that a heating source is used for performing heating without being additionally provided with a boiler or adopting other methods, the waste gas of the four-effect vacuum evaporation first-effect condensate is fully utilized for performing heating, the non-condensable gas in the brine is removed, the energy resources are saved, and the evaporation heat efficiency of an evaporator is increased.
Description
Technical field
The present invention relates to a kind of brine treatment method, be specifically related to the brine treatment method that a kind of underground mirabilite hydrate ore deposit solution mining makes.
Background technology
Take the process of salt lake mirabilite ore deposit as raw material production industry Sodium sulphate anhydrous, 99min, dissolve sodium sulfate aqueous salt brine prepared by mirabilite ore, focus on the refining purification of the removal of impurity, often ignored and established Special Equipment except non-condensable gases.Especially the bittern that the underground mirabilite ore of solution mining makes, except non-condensable gases especially seems important.No side, will have a strong impact on normally carrying out of production.Salt lake mirabilite ore deposit, buried underground mirabilite ore, in forming process, by fresh water to becoming ore deposit process, after animals and plants are rotted, organic gas remains in mirabilite ore, behind molten ore deposit, after bittern heating, be dissolved in the non-condensable gases (carbonic acid gas of bittern, methane, hydrogen sulfide etc.), non-condensable gases is brought the heating chamber of vaporizer into, temperature can be along with water of condensation is discharged after reducing, enrichment along with non-condensable gases, taken heating chamber space, stop the steam that slowed down to enter, have a strong impact on the usefulness of vaporizer, can not bring into play the due steam capability of equipment, thereby increased Sodium sulfate anhydrous.min(99) production cost.
In engineering design, at vaporizer, be provided with the pipeline of special discharge non-condensable gases, still, along with a large amount of discharge of non-condensable gases, taken away too much steam, cause energy dissipation, also can increase Sodium sulfate anhydrous.min(99) cost.For CN201220742296.0, CN201210581256.7, CN87108324.8, CN201210017877.2, CN201210345406.4 all refines purification without the brine depth of realizing that removes non-condensable gases.Therefore set up in the present invention, remove specially non-condensable gases device, preferably resolve the refining purifying problem of brine depth.Thereby guaranteed to produce, normally carry out.
Summary of the invention
The technology of the present invention is for problems of the prior art.
The technical solution that realizes above-mentioned purpose is:
The brine treatment method that underground mirabilite hydrate ore deposit solution mining makes, comprises the following steps:
A, refining purified brine: sodium sulphate content is greater than more than 20%, the bittern of temperature 40-50 ℃ is through gap clarifying tank, and interpolation water purification agent, soda ash, caustic soda reaction are removed after calcium and magnesium ion, and the clarification of flocculation nature, through accurate filter filtration, obtains refining bittern;
B, remove non-condensable gas: at refining bittern storage tank top, add degassing tower, refining bittern is by being pumped into circulation, after the first effect of the quadruple effect vacuum-evaporation water of condensation preheating being had surplus heat by band, through pipeline circulation, deliver to degassing tower middle and upper part, spray and under, non-condensable gases is discharged from top of tower, and reciprocation cycle reaches the object that removes non-condensable gases.
Wherein the temperature of the first effect of quadruple effect vacuum-evaporation water of condensation is 120-135 ℃, through the refining brine temperature of preheater preheating, is 95-100 ℃.
Wherein refining bittern storage tank temperature is controlled and is not less than 40 ℃.
Take the major advantage of aforesaid method to be, heat source does not need separately to establish boiler or the heating of other method, and the head that takes full advantage of quadruple effect vacuum-evaporation is imitated condensation water residual heat heating, sloughs bittern non-condensable gases, save the energy, improved evaporator evaporation thermo-efficiency.The ability of having brought into play Sodium sulfate anhydrous.min(99) production unit, has reduced Sodium sulfate anhydrous.min(99) production cost, can reach again Sodium sulfate anhydrous.min(99) national standard and export-grade requirement.
Accompanying drawing explanation
Accompanying drawing 1 is while using brine treatment method of the present invention, the degassed schematic flow sheet of bittern.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
The brine treatment method that underground mirabilite hydrate ore deposit solution mining makes, comprises the following steps:
A, refining purified brine: sodium sulphate content is greater than more than 20%, the bittern of temperature 40-50 ℃ is through gap clarifying tank, and interpolation water purification agent, soda ash, caustic soda reaction are removed after calcium and magnesium ion, and the clarification of flocculation nature, through accurate filter filtration, obtains refining bittern;
B, remove non-condensable gas: at refining bittern storage tank 1 top, add degassing tower 2, refining bittern is pressed into circulation by pump 3, after the first effect of the quadruple effect vacuum-evaporation water of condensation preheating being had surplus heat by band, through pipeline circulation, deliver to degassing tower 2 middle and upper parts, spray and under, non-condensable gases is discharged from degassing tower 2 tops, and reciprocation cycle, reaches the object that removes non-condensable gases.
Wherein the temperature of the first effect of quadruple effect vacuum-evaporation water of condensation is 120-135 ℃, through the refining brine temperature of preheater preheating, is 95-100 ℃.
Wherein refining bittern storage tank 1 temperature is controlled and is not less than 40 ℃.
Accompanying drawing 1 is while using brine treatment method of the present invention, the degassed schematic flow sheet of bittern.The bittern obtaining through refining stores and collects in refining bittern storage tank 1.The present invention is by the first effect of quadruple effect vacuum-evaporation condensation hot water, and the heat transfer tube through four preheater 5-8 one end, with the refining purified brine countercurrent flow entering from the other end.After preheating bittern through pipeline deliver to degassing tower 2 middle and upper parts sprays and under, non-condensable gases is discharged from degassing tower top, degassed rear bittern is from flowing back to refining bittern storage tank, reciprocation cycle, reaches the object that removes non-condensable gases.
Adopt the advantage of aforesaid method to be, bittern preheating and remove non-condensable gases and complete a technological process, refining bittern storage tank 1 and degassing tower 2 are an integral device system.Less investment, it is complete that deep refining purified brine removes non-condensable gases effect, abundant raising quadruple effect vacuum-evaporation appts efficiency, energy-saving effect is remarkable, reduces Sodium sulfate anhydrous.min(99) production cost.
Above-mentioned specific embodiment is described by example, should be understood that, these embodiment are subject to the impact of different distortion and optional form.It should also be further understood that, claim is not meaned and is limited to disclosed particular form, and should cover all distortion, the equivalence that drop in essence of the present invention and scope, replaces and optional mode.
Claims (3)
1. the brine treatment method that underground mirabilite hydrate ore deposit solution mining makes, comprises the following steps:
A, refining purified brine: sodium sulphate content is greater than more than 20%, the bittern of temperature 40-50 ℃ is through gap clarifying tank, and interpolation water purification agent, soda ash, caustic soda reaction are removed after calcium and magnesium ion, and the clarification of flocculation nature, through accurate filter filtration, obtains refining bittern;
B, remove non-condensable gas: at refining bittern storage tank top, add degassing tower, refining bittern is by being pumped into circulation, after the first effect of the quadruple effect vacuum-evaporation water of condensation preheating being had surplus heat by band, through pipeline circulation, deliver to degassing tower middle and upper part, spray and under, non-condensable gases is discharged from degassing tower top, and reciprocation cycle, reaches the object that removes non-condensable gases.
2. method according to claim 1, wherein the temperature of the first effect of quadruple effect vacuum-evaporation water of condensation is 120-135 ℃, through the refining brine temperature of preheater preheating, is 95-100 ℃.
3. method according to claim 1, wherein refines the control of bittern storage tank temperature and is not less than 40 ℃.
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| CN201310676005.1A CN103693794B (en) | 2013-12-12 | 2013-12-12 | The brine treatment method that mirabilite hydrate ore deposit, a kind of underground solution mining prepares |
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| CN201310676005.1A CN103693794B (en) | 2013-12-12 | 2013-12-12 | The brine treatment method that mirabilite hydrate ore deposit, a kind of underground solution mining prepares |
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| CN103693794A true CN103693794A (en) | 2014-04-02 |
| CN103693794B CN103693794B (en) | 2016-08-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105600857A (en) * | 2015-10-22 | 2016-05-25 | 唐山三友集团兴达化纤有限公司 | Degassing treatment technology of alkaline wastewater in viscose fiber production |
Citations (3)
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| JP2009013101A (en) * | 2007-07-04 | 2009-01-22 | Daikin Ind Ltd | Method for purifying pentafluoroethane |
| CN202849080U (en) * | 2012-07-05 | 2013-04-03 | 郭树林 | Multi-effect spray salt preparation device with circuitous sun bag |
| CN103332706A (en) * | 2013-06-28 | 2013-10-02 | 湖南省湘衡盐化有限责任公司 | Vacuum deoxidation method of salt manufacturing system |
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Patent Citations (3)
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|---|---|---|---|---|
| JP2009013101A (en) * | 2007-07-04 | 2009-01-22 | Daikin Ind Ltd | Method for purifying pentafluoroethane |
| CN202849080U (en) * | 2012-07-05 | 2013-04-03 | 郭树林 | Multi-effect spray salt preparation device with circuitous sun bag |
| CN103332706A (en) * | 2013-06-28 | 2013-10-02 | 湖南省湘衡盐化有限责任公司 | Vacuum deoxidation method of salt manufacturing system |
Non-Patent Citations (1)
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| 方远西等: "探讨硫酸钠型卤水生产制碱用液体盐的方法", 《中国井矿盐》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105600857A (en) * | 2015-10-22 | 2016-05-25 | 唐山三友集团兴达化纤有限公司 | Degassing treatment technology of alkaline wastewater in viscose fiber production |
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