CN101798101A - Process for preparing potassium sulfate crystal by utilizing industrial wastewater from 26 acid production - Google Patents
Process for preparing potassium sulfate crystal by utilizing industrial wastewater from 26 acid production Download PDFInfo
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- CN101798101A CN101798101A CN200910008844A CN200910008844A CN101798101A CN 101798101 A CN101798101 A CN 101798101A CN 200910008844 A CN200910008844 A CN 200910008844A CN 200910008844 A CN200910008844 A CN 200910008844A CN 101798101 A CN101798101 A CN 101798101A
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- Prior art keywords
- tartar
- vitriolate
- xln
- preparation technology
- trade effluent
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- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a process for preparing potassium sulfate crystal by utilizing industrial wastewater from the 26 acid production process through treatment. The process comprises the following preparing steps of: a, adding original wastewater adsorbed by resin into potassium hydroxide for neutralization, and regulating pH value of the wastewater from 2.5 to between 6 and 7.5; b, introducing the wastewater with the pH value of between 6 and 7.5 to an evaporation crystallizer for evaporation and crystallization, and condensing the wastewater till supersaturated concentration; and c, pumping the concentrated crystal and saturated mother solution of potassium sulfate to a centrifuge for solid-liquid separation, and finally obtaining crystalline potassium sulfate. The process for preparing the potassium sulfate crystal by utilizing the industrial wastewater from the 26 acid production treats the industrial wastewater and can also form a byproduct with certain economic value. The process has good synergy with an original 26 acid production process and has the characteristics of simple and convenient operation and management and low operating cost.
Description
Technical field
The present invention relates to a kind of processing method of industrial waste water, a kind of specifically preparation technology who utilizes the trade effluent production byproduct vitriolate of tartar xln of producing 26 acid generations.
Background technology
Generally all contain a large amount of salt compounds in the trade effluent, if these salt compounds emit with waste water, not only cause the pollution of environment, and be a kind of wasting of resources, if useful material wherein can be recycled, not only can reduce pollution, and can reach the effect of saving cost environment.Contain a large amount of vitriolate of tartar in the trade effluent that 26 acid produce, 26 sour English names are 2-Hydroxy-6-Naphthoic Acid, and molecular formula is C
11H
8O
3Good method is used for 26 acid are produced the preparation technology that trade effluent is converted into the vitriolate of tartar xln to go back none at present.
Summary of the invention
Purpose of the present invention produces the preparation technology that trade effluent is converted into the vitriolate of tartar xln for 26 acid that utilize that a kind of technological effect is good, operational management is easy, running cost is low are provided.
The technical scheme that realizes above-mentioned purpose is as follows:
26 acid produce the preparation technology that trade effluent is produced the vitriolate of tartar xln, comprise the steps:
A, at first will add potassium hydroxide neutralization carrying out pH through 26 acid producing waste waters after the resin absorption and adjust, and make it to adjust to 6-7.5 from 2.5;
B, again will adjust waste water behind the pH pump in the evaporative crystallizer concentrate, crystallization, be concentrated into supersaturation concentration;
C, the xln after concentrating and the saturated mother liquor of vitriolate of tartar pump into whizzer and carry out solid-liquid separation, finally obtain the lenticular vitriolate of tartar.
Wherein said evaporative crystallizer is single, double, multiple-effect evaporation crystallizer.
Wherein in the concentration process, the flow velocity of material is 0.5-3m/s in the evaporative crystallizer.
Wherein the temperature of evaporative crystallization is 45-130 ℃.
Wherein the pressure of evaporative crystallization is 0.2～0.5MPa evaporating pressure, (vacuum tightness)-0.03～0.085MPa.
The preparation technology that 26 acid of the present invention produce trade effluent production vitriolate of tartar xln can make water separate with vitriolate of tartar guaranteeing that sulfur acid potassium waste water under situation about not being hydrolyzed, improves concentration by evaporation concentration, is purpose to reach recycling; Technological effect of the present invention is good simultaneously, and it is easy to reach operational management, the characteristics that running cost is low.
Embodiment
The invention will be further described below in conjunction with specific embodiment.
26 acid produce the preparation technology that trade effluent is converted into the vitriolate of tartar xln, comprise the steps:
A, at first will add the potassium hydroxide neutralization through the original waste water after the resin absorption, with waste water pH value be adjusted to 6～7.5 from 2.5;
B, the waste water that pH value is adjusted to after 6～7.5 pump into evaporative crystallizer, in evaporative crystallizer, keep 45-130 ℃ temperature condition, keep 0.2～0.5MPa evaporating pressure simultaneously, the condition of (vacuum tightness)-0.03～0.085MPa is carried out evaporative crystallization to waste water, and the flow velocity that needs to keep material in this process is 0.5-3m/s;
C, the xln after concentrating enter whizzer and carry out solid-liquid separation, finally obtain the lenticular vitriolate of tartar.
The concentration 5～20% of vitriolate of tartar before the described evaporation is brought up to supersaturation concentration after evaporation, produce the vitriolate of tartar xln.
Described energy-saving vaporizer is efficient energy-saving vaporizer or steam compression type energy-saving evaporator.
The high temperature of described efficient energy-saving vaporizer is imitated end and is used forced circulation pump, and circulation time keeps the material flow 0.5-3m/s in the tubulation.
Material flow in the described well heater tubulation is 1.5-3.0m/s.
The vaporization temperature of described vaporizer remains on 45-130 ℃, and the drop temperature that concentrates back vitriolate of tartar xln is lower than 50～80 ℃.
The present invention utilizes existing equipment, can finish through simple technical finesse, and cost is low.
Claims (6)
1. a preparation technology who utilizes the trade effluent production byproduct vitriolate of tartar xln of producing 26 acid generations comprises the steps:
A, at first will add the potassium hydroxide neutralization through the original waste water after the resin absorption, with waste water pH value be adjusted to 6～7.5 from 2.5;
B, pH value is adjusted to water after 6～7.5 enters that energy-saving evaporative crystallizer evaporates, crystallization, be concentrated into supersaturation concentration;
C, the xln after concentrating and the saturated mother liquor of vitriolate of tartar pump into whizzer and carry out solid-liquid separation, finally obtain the lenticular vitriolate of tartar.
2. the preparation technology of the trade effluent production byproduct vitriolate of tartar xln of 26 acid generations is produced in utilization according to claim 1, and it is characterized in that: described energy-saving vaporizer is efficient energy-saving vaporizer or steam compression type energy-saving evaporator.
3. the preparation technology of the trade effluent production byproduct vitriolate of tartar xln of 26 acid generations is produced in utilization according to claim 2, it is characterized in that: the high temperature of described efficient energy-saving vaporizer is imitated end and is used forced circulation pump, and circulation time keeps the material flow 0.5-3m/s in the tubulation.
4. a kind of preparation technology who utilizes the trade effluent production byproduct vitriolate of tartar xln of producing 26 acid generations according to claim 3, it is characterized in that: the material flow in the described well heater tubulation is 1.5-3.0m/s.
5. a kind of preparation technology who utilizes the trade effluent production byproduct vitriolate of tartar xln of producing 26 acid generations according to claim 1 and 2, it is characterized in that: the vaporization temperature of described vaporizer remains on 45-130 ℃, and the drop temperature that concentrates back vitriolate of tartar xln is lower than 50～80 ℃.
6. a kind of preparation technology who utilizes the trade effluent production byproduct vitriolate of tartar xln of producing 26 acid generations according to claim 5, it is characterized in that: the concentration 5～20% of vitriolate of tartar before the described evaporation, after evaporation, bring up to supersaturation concentration, produce the vitriolate of tartar xln.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910008844A CN101798101A (en) | 2009-02-10 | 2009-02-10 | Process for preparing potassium sulfate crystal by utilizing industrial wastewater from 26 acid production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910008844A CN101798101A (en) | 2009-02-10 | 2009-02-10 | Process for preparing potassium sulfate crystal by utilizing industrial wastewater from 26 acid production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101798101A true CN101798101A (en) | 2010-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910008844A Pending CN101798101A (en) | 2009-02-10 | 2009-02-10 | Process for preparing potassium sulfate crystal by utilizing industrial wastewater from 26 acid production |
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| CN (1) | CN101798101A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092875A (en) * | 2010-12-09 | 2011-06-15 | 苏州林通新材料科技有限公司 | Wastewater treatment method |
| CN102701505A (en) * | 2012-06-18 | 2012-10-03 | 山东裕源集团有限公司 | Equipment for treating H-acid production wastewater |
| CN102701506A (en) * | 2012-06-18 | 2012-10-03 | 山东裕源集团有限公司 | Method for treating H-acid production wastewater |
| CN102936075A (en) * | 2012-11-13 | 2013-02-20 | 常州大学 | Method for recycling industrial wastewater generated during alanine production |
| CN105016361A (en) * | 2015-08-14 | 2015-11-04 | 天津市永大化学试剂有限公司 | Preparing method of potassium sulphate reagent |
| CN107459050A (en) * | 2017-08-15 | 2017-12-12 | 深圳市深投环保科技有限公司 | RGB waste liquids and depainting Waste Sulfuric Acid processing method |
| CN109592698A (en) * | 2018-12-12 | 2019-04-09 | 天津大学 | A method of preparing funnel-form sodium sulphate from high-salt wastewater |
-
2009
- 2009-02-10 CN CN200910008844A patent/CN101798101A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102092875A (en) * | 2010-12-09 | 2011-06-15 | 苏州林通新材料科技有限公司 | Wastewater treatment method |
| CN102092875B (en) * | 2010-12-09 | 2012-11-14 | 苏州林通新材料科技有限公司 | Chemical waste water treatment method in the process of producing 2,6 acid |
| CN102701505A (en) * | 2012-06-18 | 2012-10-03 | 山东裕源集团有限公司 | Equipment for treating H-acid production wastewater |
| CN102701506A (en) * | 2012-06-18 | 2012-10-03 | 山东裕源集团有限公司 | Method for treating H-acid production wastewater |
| CN102701506B (en) * | 2012-06-18 | 2014-11-26 | 山东裕源集团有限公司 | Method for treating H-acid production wastewater |
| CN102936075A (en) * | 2012-11-13 | 2013-02-20 | 常州大学 | Method for recycling industrial wastewater generated during alanine production |
| CN105016361A (en) * | 2015-08-14 | 2015-11-04 | 天津市永大化学试剂有限公司 | Preparing method of potassium sulphate reagent |
| CN107459050A (en) * | 2017-08-15 | 2017-12-12 | 深圳市深投环保科技有限公司 | RGB waste liquids and depainting Waste Sulfuric Acid processing method |
| CN107459050B (en) * | 2017-08-15 | 2019-07-30 | 深圳市深投环保科技有限公司 | RGB waste liquid and depainting Waste Sulfuric Acid processing method |
| CN109592698A (en) * | 2018-12-12 | 2019-04-09 | 天津大学 | A method of preparing funnel-form sodium sulphate from high-salt wastewater |
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Open date: 20100811 |