CN105314654A - Recycling device for nitrogen-containing wastewater - Google Patents
Recycling device for nitrogen-containing wastewater Download PDFInfo
- Publication number
- CN105314654A CN105314654A CN201510795014.1A CN201510795014A CN105314654A CN 105314654 A CN105314654 A CN 105314654A CN 201510795014 A CN201510795014 A CN 201510795014A CN 105314654 A CN105314654 A CN 105314654A
- Authority
- CN
- China
- Prior art keywords
- ammonium chloride
- sodium
- resorber
- sodium bicarbonate
- decomposer
- 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.)
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Abstract
The invention belongs to the technical field of chemical engineering and environmental engineering, and relates to a recycling device for ammonia nitrogen-containing wastewater. The recycling device adopts a complete circulating system formed by a decomposer, an absorber and an ammonium chloride separating system. The ammonia nitrogen-containing wastewater enters the decomposer to react with recycled circulating sodium bicarbonate to generate ammonia gas and carbon dioxide, the ammonia gas and the carbon dioxide are sucked into the absorber to react with a sodium chloride solution, separated sodium bicarbonate returns to the decomposer, sodium chloride is dissolved in a mother solution and recycled in an ammonium chloride recycling system, and after ammonium chloride is separated, the mother solution serves as the sodium chloride solution to return to the absorber. In this way, recycling of the ammonia nitrogen-containing waste liquid is achieved through the circulating and reciprocating steps, the byproduct ammonium chloride is obtained, only a small amount of heat energy is consumed, a medium is close to be neutral, and the corrosivity is little.
Description
Technical field
The invention belongs to the technical field of chemical engineering and environmental engineering, be specially a kind of regeneration device of the nitrogenous effluent often run in chemical engineering, more precisely, is a kind of regeneration device of nitrogen-containing wastewater.
In chemical industry, double decomposition (comprising ion exchange method) is often adopted to manufacture its sodium salt from a kind of ammonium salt of acid, sylvite or other salts, at this moment can the aqueous solution of a large amount of containing ammonium chloride of association, be difficult to process.Can adopt electroosmose process enrichment at present, or adopt the method for evaporation concentration to reclaim, but because corrodibility is strong and other various reasons, cost of equipment is high, and energy consumption is high, usually can not obtain promising result.The present invention advises a kind of simple and reliable and economic sodium-chlor-carbon dioxide recycle subtraction unit, can receive promising result.
Background technology
Industrial frequent employing replacement(metathesis)reaction manufactures the salt of various acid, and wherein the most frequently used raw material is the ammonium salt of certain acid.Now be illustrated to manufacture sylvite.If with H
nac represents certain acid, and the reaction formula using its ammonium salt to manufacture sylvite can be expressed as follows:
（NH
4）
nAc+nKCl=K
nAc+nNH
4Cl
The ammonium chloride of by-product is often present in a large number containing product K
nin the solution of Ac, be difficult to be separated simply and effectively.The present invention is exactly for this problem, and suggestion is a kind of simple and practical, corrodes very littlely to consume again very low regeneration device.
Summary of the invention
The measure of technical solution problem
The method of the present invention's suggestion is called sodium-chlor-carbon dioxide recycle method, based on the easy decomposes of bicarbonate of ammonia and the low solubility of sodium bicarbonate.Whole device is made up of be mutually related splitter and resorber two major portions, and the working cycle related to is:
1, in splitter, the ammonium chloride in solution and reaction of sodium bicarbonate generate bicarbonate of ammonia and sodium-chlor
NH
4Cl+NaHCO
3=NaCl+NH
4HCO
3
NH
4hCO
3=NH
3+ CO
2+ H
2o, ammonia and carbonic acid gas enter gas phase and are drawn in resorber.
The sodium-chlor exceeding saturation concentration is separated out, and is separated.Mother liquor is deamination, returns production system and recycles, and reclaims sodium-chlor and is sent to resorber.
2, the process completed in absorption phase is:
NaCl+NH
3+CO
2+H
2O，=NH
4Cl+NaHCO
3
Sodium bicarbonate is separated with mother liquor, and sodium bicarbonate is recycled to the reaction that splitter participates in decomposing ammonium chloride again, the sodium-chlor of mother liquor dissolving circulation, separating ammonium chloride, is then recycled to resorber absorbing carbon dioxide and ammonia again.
Process so circulates and carries out, and be constantly reproduced containing ammonia nitrogen mother liquor and get back to the use of sylvite reactive system, ammonium chloride is constantly exhausted from system (byproduct).Carbonic acid gas and sodium-chlor circulate in systems in which, just a small amount of heat energy of consumption.Decomposition heat very low due to bicarbonate of ammonia, the energy that this process consumes, wants much less than evaporation concentration.Particularly, this process is all carried out in close to neutral environment, and corrode very little, cost of equipment reduces greatly.
The beneficial effect that the present invention obtains is: (1) does not consume any raw material substantially, and only consuming little heat energy just can a large amount of liquid waste disposal recycling utilization containing ammonia nitrogen, side product sodium chloride.(2) apparatus structure is simple, micro-negative pressure operation, and react and carrying out close to neutral environment, corrosion is slight.(3) efficiency and the benefit of replacement(metathesis)reaction can greatly be improved.
This device is almost applicable to all replacement(metathesis)reactions, no matter is inorganics or organism.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the invention will be further described.
Accompanying drawing is a schematic diagram utilizing sodium-chlor-carbon dioxide recycle to realize the device utilized containing ammonium nitrogen waste water reclamation.
Wherein 2 is treating material entrances, and what dissolved sodium bicarbonate contains ammonium nitrogen waste water from entering splitter 1 here.Be provided with interchanger 6 inside splitter 1, heating steam enters interchanger heating from steam-in 3, maintain the temperature of reaction needed, water of condensation is got rid of from solidifying water out 4.7 is glass visors.The ammonia produced in splitter and carbon dioxide gas, through injector 8 suction resorber solution absorption, absorb feed liquid and circulate through mortar pump by draining mouth 15, do not draw water pump and circulation line in figure.9 is circulation mother liquid of sodium entrances of resorber, and 11 is offgas outlet of resorber.10 is stirrers of resorber, keeps the sodium bicarbonate generated to be in well suspended state.13 is cooling jackets of resorber, and water coolant enters from cooling water inlet 12, gets rid of from cooling water outlet 14, realizes the cooling for absorbing material.The qualified material of denitrogenation is got rid of from the mouth 5 that drains of splitter, and the sodium bicarbonate slip that absorption reaction is qualified is got rid of from the mouth 15 that drains of resorber, is sent to sodium bicarbonate separating machine, filters out sodium bicarbonate, return splitter and recycle through mortar pump.Be separated the mother liquor of sodium bicarbonate, the sodium-chlor of dissolving circulation, after separating ammonium chloride, returns resorber and recycles.Total operating performance is, the ammonium chloride in waste water, through the sodium-chlor of circulation and the effect of carbonic acid gas, is completely segregated out, becomes by-product sale, the waste water of separating ammonium chloride, return manufacturing system completely and reuse, just a small amount of heat energy of consumption.
Claims (3)
1. the regeneration device of a nitrogenous effluent, its Main Basis is by the circulation through intermediate sodium bicarbonate of sodium-chlor and carbonic acid gas, the ammonium chloride Separation and Recovery in waste water, mother liquor returns manufacturing system recycle, and treatment unit comprises the decomposition reactor that has heating unit, and one has stirring and the resorber of refrigerating unit, with an ammonium chloride separation system, and by water pump, filter plant and transport unit couple together, become a complete recycle system.
2. based on the device of claim 1, splitter wherein can operate under malleation or negative pressure condition, and working temperature 40-90 degree Celsius can use any heat source.
3. based on the equipment of claim 1, resorber wherein can use to absorb the injection that slip is working medium and absorb, or gas direct solution absorption in the liquid phase, working temperature 0-60 degree Celsius.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510795014.1A CN105314654A (en) | 2015-11-18 | 2015-11-18 | Recycling device for nitrogen-containing wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510795014.1A CN105314654A (en) | 2015-11-18 | 2015-11-18 | Recycling device for nitrogen-containing wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105314654A true CN105314654A (en) | 2016-02-10 |
Family
ID=55243089
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510795014.1A Pending CN105314654A (en) | 2015-11-18 | 2015-11-18 | Recycling device for nitrogen-containing wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105314654A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108793114A (en) * | 2017-05-07 | 2018-11-13 | 黄尚勋 | A kind of potassium dihydrogen phosphate new process for producing of environmental protection and energy saving |
| CN113479985A (en) * | 2021-08-04 | 2021-10-08 | 中南大学 | Method for transformation deamination of ammonia nitrogen wastewater |
-
2015
- 2015-11-18 CN CN201510795014.1A patent/CN105314654A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108793114A (en) * | 2017-05-07 | 2018-11-13 | 黄尚勋 | A kind of potassium dihydrogen phosphate new process for producing of environmental protection and energy saving |
| CN113479985A (en) * | 2021-08-04 | 2021-10-08 | 中南大学 | Method for transformation deamination of ammonia nitrogen wastewater |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160210 |