CN101585615A - Calcium saponification art for ammonium chloride wastewater - Google Patents
Calcium saponification art for ammonium chloride wastewater Download PDFInfo
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- CN101585615A CN101585615A CNA2009100333032A CN200910033303A CN101585615A CN 101585615 A CN101585615 A CN 101585615A CN A2009100333032 A CNA2009100333032 A CN A2009100333032A CN 200910033303 A CN200910033303 A CN 200910033303A CN 101585615 A CN101585615 A CN 101585615A
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- ammonium chloride
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Abstract
The invention relates to a calcium saponification art for the ammonium chloride wastewater, which solves the problem of secondary pollution since the prior art is difficult to be suitable for the wastewater treatment with different concentration and comprises following steps: A. adding the ammonium chloride wastewater into a stirring groove, sampling and analyzing the NH4 [+] concentration in the ammonium chloride wastewater; B. adjusting the NH4 [+] concentration in the ammonium chloride wastewater to 106.9g/L; C. adding proper calcium hydrate in the ammonium chloride wastewater, stirring uniformly, sampling and analyzing the ammonia water concentration; D. adjusting the ammonia water concentration to 1.9 mol/L-2.1 mol/L, adding in a seal settling basin for settling 3-4 hours, performing the organic saponification of the rare-earth and the nonferrous metal. The invention has the advantages that it is suitable for processing the ammonium chloride wastewater with different concentration, has low cost, complete reaction without secondary pollution and effectively uses the wastewater resource.
Description
Technical field
The present invention relates to technical field of waste water processing, especially relate to a kind of calcium saponification art of ammonium chloride waste-water.
Background technology
The direct discharging of ammonium chloride waste-water will aggravate the eutrophy degree at acceptor water source greatly, serious environment pollution, discharging simultaneously directly also is a kind of serious waste of resource, therefore ammonium chloride waste-water is handled and is utilized the zero release that realizes waste water significant to the environmental protection and the utilization of resources.To the processing of ammonium chloride waste-water, the main technique method has physics method and chemical method at present.Methods such as ion exchange method, ammonia stripping, vaporizing extract process, multiple-effect evaporation method and electrodialysis are arranged in the physics method.Chemical method has biochemical treatment process, the art treatments such as (or calcium hydroxide) processing that add alkali.
Ion exchange method: zeolite is a kind of ammonium ion to be had the very silico-aluminate of strong selectivity, generally is used to remove the clinoptilolite that is of ammonia nitrogen as ion exchange resin.This method has that reduced investment, technology are simple, operation advantage comparatively easily, but for the ammonia nitrogen waste water of high density, can make resin regeneration frequent and cause operational difficulty, and regenerated liquid still be high-concentration ammonia nitrogenous wastewater, needs processing again.Ammonia stripping, vaporizing extract process: ammonia stripping, stripping are mass transfer processes, promptly when high pH, thereby waste water and air are contacted closely reduce the process of ammonia concentration in the waste water, impellent poor between the equilibrium partial pressure that ammonia concentration is suitable in the dividing potential drop of ammonia in the air and the waste water.Advantages such as ammonia stripping, stripping process have that flow process is simple, treatment effect is stable, capital cost and running cost are lower, but its shortcoming is to generate incrustation scale, and in large-scale ammonia stripping, stripping tower, generating incrustation scale is a serious operational issue.The evaporative crystallization method: thus method of evaporation is to utilize the bath heat of heating steam to make the gasification of being heated of water in the waste water make waste water obtain spissated a kind of treatment process, this method is applicable to that the processing of high density ammoniated wastewater and crystallisation process combine, and ammonium nitrides is recycled.But it is very high for the low concentration wastewater working cost.In chemical method, the treatment effect of biochemical process is stable, and process cost is lower, if but ammonium chloride waste-water concentration is higher, surpass 10000mg/L, and bacterial classification can't be survived, and biochemical treatment can't be carried out.Add alkali (or calcium hydroxide) though concentrate and reclaim the ammonium chloride waste-water that ammonia technology can adapt to various concentration, exist and consume high, reaction not exclusively and have a secondary pollution problems.
For this reason, people have carried out long-term exploration, have proposed various solutions.For example, Chinese patent literature discloses a kind of ammonium chloride waste-water zero-displacement treatment process [application number: 200310117823.4], and concrete grammar is: (1) ammonium chloride solution enters pretreatment unit, makes water quality SDI＜3, turbidity＜0.1NTU after the processing.(2) enter multistage multistage reverse osmosis membrane group.Condensed water ammonium chloride concentration after the reverse osmosis membrane group is handled can reach 5-8%.(3) the reverse osmosis unit concentrated water outlet of coming out enters the distillation evaporation unit and further is concentrated into ammonium chloride concentration 36-45%.(4) the ammonium chloride concentrated solution after the further concentration is produced ammonium chloride to the crystallization apparatus crystallisation by cooling, and crystalline mother solution returns evaporation unit through decalcification, magnesium apparatus after handling, and enters evaporation unit with the concentrated water outlet of reverse osmosis membrane group and circulates concentrated.The present invention not only can reach the zero emission requirement of ammonium chloride waste-water, and can obtain two kinds of products, and ammonia chloride crystal and technology fresh water are handled the waste water of ammonium chloride content from 500MG/L-200000MG/L.But aforesaid method exists the processing step complexity, wastes time and energy the more high technological deficiency of tooling cost:.
Summary of the invention
The objective of the invention is at the problems referred to above, a kind of easy handling is provided, cost is lower, and is time saving and energy saving, can realize efficient recovery, the calcium saponification art of the ammonium chloride waste-water of energy-conserving and environment-protective.
For achieving the above object, the present invention has adopted following technical proposal: the calcium saponification art of this ammonium chloride waste-water is characterized in that this technology comprises the steps:
A, ammonium chloride waste-water is put into steel basin, NH4 in the sampling analysis ammonium chloride waste-water
+Concentration;
B, according to analytical results, with the NH4 in the ammonium chloride waste-water
+Concentration is adjusted to 106.9g/L, and ammonium chloride waste-water is mixed;
C, in ammonium chloride waste-water, add an amount of calcium hydroxide, stir the sampling analysis ammonia concn;
D, according to the analytical results of step C, when ammonia concn is adjusted to 1.9mol/L-2.1mol/L, put it into the sealing settling tank, precipitation 3-4 hour is carried out organic saponification of rare earth and non-ferrous metal.
In the calcium saponification art of above-mentioned ammonium chloride waste-water, among the described step B, if NH4 in the ammonium chloride waste-water
+Concentration is lower than 106.9g/L, then adds solid ammonium chloride and is adjusted to NH4
+Concentration is 106.9g/L.
In the calcium saponification art of above-mentioned ammonium chloride waste-water, among the described step D, if ammonia concn is lower than 1.9mol/L in the ammonium chloride waste-water, then adding solid ammonium chloride, to be adjusted to ammonia concn be 1.9mol/L-2.1mol/L.
In the calcium saponification art of above-mentioned ammonium chloride waste-water, among the described step B, NH4 in the ammonium chloride waste-water
+When concentration was lower than 106.9g/L, the adding solid ammonium chloride also stirred 15-20 minute.
In the calcium saponification art of above-mentioned ammonium chloride waste-water, among the described step C, the churning time behind the adding calcium hydroxide is 15-20 minute.
In the calcium saponification art of above-mentioned ammonium chloride waste-water, among the described step C, NH4
+Concentration is the 5M of 106.9g/L
3The weight that adds calcium hydroxide in the ammonium chloride waste-water is 450g.
Compared with prior art, the advantage of the calcium saponification art of this ammonium chloride waste-water is: 1, easy handling and enforcement, entire treatment technology is time saving and energy saving, can be applicable to that the ammonium chloride waste-water of various concentration is handled.2, processing cost is lower, reacts completely, and does not have the secondary pollution problem.3, when solving environmental problem, make waste water resource obtain effective utilization, have the higher value of environmental protection and economic worth.4, can carry out recycle, realize energy-saving and emission-reduction.
Embodiment
The calcium saponification art of this ammonium chloride waste-water comprises the steps:
A, ammonium chloride waste-water is pumped and puts into steel basin from merge storage tank, NH4 in the sampling analysis ammonium chloride waste-water
+Concentration.
B, according to analytical results, with the NH4 in the ammonium chloride waste-water
+Concentration is adjusted to 106.9g/L, and ammonium chloride waste-water is mixed.
C, in ammonium chloride waste-water, add an amount of calcium hydroxide, stir the sampling analysis ammonia concn;
D, according to the analytical results of step C, when ammonia concn is adjusted to 1.9mol/L-2.1mol/L, put it into the sealing settling tank, precipitation 3-4 hour is carried out organic saponification of rare earth and non-ferrous metal.
Among the above-mentioned steps B, if NH4 in the ammonium chloride waste-water
+Concentration is lower than 106.9g/L, then adds solid ammonium chloride and stirs 15-20 minute, and ammonium chloride waste-water is adjusted to NH4
+Concentration is 106.9g/L.
Among the above-mentioned steps C, the churning time behind the adding calcium hydroxide is 15-20 minute, is preferably 10 minutes.NH4
+Concentration is the 5M of 106.9g/L
3The weight that adds calcium hydroxide in the ammonium chloride waste-water is 450g.
Among the above-mentioned steps D, if ammonia concn is lower than 1.9mol/L in the ammonium chloride waste-water, then adding solid ammonium chloride, to be adjusted to ammonia concn be 1.9mol/L-2.1mol/L.
Specific embodiment described herein only is that the present invention's spirit is illustrated.The technician of the technical field of the invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has used term morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present invention more easily; They are construed to any additional restriction all is contrary with spirit of the present invention.
Claims (6)
1. the calcium saponification art of an ammonium chloride waste-water is characterized in that, this technology comprises the steps:
A, ammonium chloride waste-water is put into steel basin, NH4 in the sampling analysis ammonium chloride waste-water
+Concentration;
B, according to analytical results, with the NH4 in the ammonium chloride waste-water
+Concentration is adjusted to 106.9g/L, and ammonium chloride waste-water is mixed;
C, in ammonium chloride waste-water, add an amount of calcium hydroxide, stir the sampling analysis ammonia concn;
D, according to the analytical results of step C, when ammonia concn is adjusted to 1.9mol/L-2.1mol/L, put it into the sealing settling tank, precipitation 3-4 hour is carried out organic saponification of rare earth and non-ferrous metal.
2. the calcium saponification art of ammonium chloride waste-water according to claim 1 is characterized in that, among the described step B, if NH4 in the ammonium chloride waste-water
+Concentration is lower than 106.9g/L, then adds solid ammonium chloride and is adjusted to NH4
+Concentration is 106.9g/L.
3. the calcium saponification art of ammonium chloride waste-water according to claim 1 is characterized in that, among the described step D, if ammonia concn is lower than 1.9mol/L in the ammonium chloride waste-water, then adding solid ammonium chloride, to be adjusted to ammonia concn be 1.9mol/L-2.1mol/L.
4. the calcium saponification art of ammonium chloride waste-water according to claim 2 is characterized in that, among the described step B, and NH4 in the ammonium chloride waste-water
+When concentration was lower than 106.9g/L, the adding solid ammonium chloride also stirred 15-20 minute.
5. according to the calcium saponification art of claim 1 or 2 or 3 or 4 described ammonium chloride waste-waters, it is characterized in that among the described step C, the churning time behind the adding calcium hydroxide is 15-20 minute.
6. according to the calcium saponification art of claim 1 or 2 or 3 or 4 described ammonium chloride waste-waters, it is characterized in that, among the described step C, NH4
+Concentration is the 5M of 106.9g/L
3The weight that adds calcium hydroxide in the ammonium chloride waste-water is 450g.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100333032A CN101585615A (en) | 2009-06-18 | 2009-06-18 | Calcium saponification art for ammonium chloride wastewater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100333032A CN101585615A (en) | 2009-06-18 | 2009-06-18 | Calcium saponification art for ammonium chloride wastewater |
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| CN101585615A true CN101585615A (en) | 2009-11-25 |
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|---|---|---|---|
| CNA2009100333032A Pending CN101585615A (en) | 2009-06-18 | 2009-06-18 | Calcium saponification art for ammonium chloride wastewater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351295A (en) * | 2011-09-05 | 2012-02-15 | 江苏隆昌化工有限公司 | Method for treating p-chloro-o-nitroaniline wastewater |
| CN109881010A (en) * | 2019-03-12 | 2019-06-14 | 安徽寒锐新材料有限公司 | The processing method of cobalt carbonate mother liquor in cobalt powder presoma cobalt carbonate preparation process |
-
2009
- 2009-06-18 CN CNA2009100333032A patent/CN101585615A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102351295A (en) * | 2011-09-05 | 2012-02-15 | 江苏隆昌化工有限公司 | Method for treating p-chloro-o-nitroaniline wastewater |
| CN109881010A (en) * | 2019-03-12 | 2019-06-14 | 安徽寒锐新材料有限公司 | The processing method of cobalt carbonate mother liquor in cobalt powder presoma cobalt carbonate preparation process |
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Application publication date: 20091125 |