CN103011484A - Method for treating ammonium chloride wastewater during production of glycin prepared based on chloroacetic acid method - Google Patents
Method for treating ammonium chloride wastewater during production of glycin prepared based on chloroacetic acid method Download PDFInfo
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- CN103011484A CN103011484A CN2013100053131A CN201310005313A CN103011484A CN 103011484 A CN103011484 A CN 103011484A CN 2013100053131 A CN2013100053131 A CN 2013100053131A CN 201310005313 A CN201310005313 A CN 201310005313A CN 103011484 A CN103011484 A CN 103011484A
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Abstract
The invention relates to a method for treating ammonium chloride wastewater during production of glycin prepared based on a chloroacetic acid method. The method comprises the steps that: firstly ammonium chloride wastewater is added into a second effect evaporator, is evaporated 5-10 percent of water by second effect evaporating for 0.5-2 hours under the temperature of 80-90 DEG C; secondly, the wastewater after second effect evaporation is added into a first effect evaporator and the curing agent melamine is added according to the mass ratio of 0.1-1 percent of melamine to ammonium chloride wastewater, and first effect evaporation is carried out for 2-4 hours under the temperature of 110-135 DEG C, formaldehyde generated during the evaporation of the curing agent and the wastewater form a nontoxic and harmless solid, and heating is stopped when precipitation of solids is observed; and then the solids such as ammonium chloride are removed by cooling and filtering at the filtering temperature of 30-40 DEG C; and the filtrate obtained is repeatedly subjected to the procedures to form circulation. The method overcomes the defects in the prior art, not only are resources recovered as much as possible, but also pollution is eliminated.
Description
Technical field
What the present invention relates to is the treatment process for the treatment of process, the especially ammonium chloride waste-water of waste water during a kind of glycine is produced.
Background technology
In recent years, along with the in the world develop rapidly of glyphosate herbicidal, glycine production as the glyphosate main raw material, also obtained developing rapidly in China, each manufacturing enterprise's output also enlarge to improve in succession, as China at present with fastest developing speed, output is maximum, export volume also the very most of employing chloroactic acid method of glycine of the main raw material of maximum glyphosate produce.But the amount as the ammonium chloride waste-water of glycine byproduct also constantly increases thereupon.The domestic processing overwhelming majority for ammonium chloride waste-water all is to adopt the mode of distillation at present.In the ammonium chloride waste-water governance process, can appear at and produce more viscous substance in the still-process, cause the accumulation of waste liquid distillation rear section viscous substance, after viscous substance is accumulated to a certain degree, formed and be difficult to the refuse that distills, filter, not only form pollution but also be a kind of waste, bring very large difficulty to wastewater treatment.
Summary of the invention
Purpose of the present inventionBe to provide a kind of chloroactic acid method to prepare the treatment process of ammonium chloride waste-water in the glycine production, it overcomes the deficiency that above-mentioned prior art exists, and can either reclaim resource as far as possible, again can decontamination.
Technical scheme of the present inventionFor:
A kind of chloroactic acid method of the present invention prepares the treatment process of ammonium chloride waste-water in the glycine production, it is characterized in that steps of the method are:
At first ammonium chloride waste-water is joined 2nd effect evaporator, under 80-90 ℃, carry out two effect evaporations 0.5-2 hour, evaporate 5% one 10% moisture content;
Secondly will join 1st effective evaporator through the waste water of above-mentioned two effect evaporations, and adding solidifying agent trimeric cyanamide, the mass ratio of solidifying agent trimeric cyanamide and ammonium chloride waste-water is 0.1%～1%, under 110-135 ℃, carry out effect evaporation 2-4 hour, the formaldehyde that solidifying agent and waste water produce in evaporative process forms nontoxic solid, to be seen when having solid to separate out, stopped heating;
Then cooling removes by filter the solids such as ammonium chloride, and filtration temperature is controlled at 30-40 ℃;
Gained filtrate is repeated aforesaid operations form circulation.
The present invention be a kind of chloroactic acid method prepare ammonium chloride waste-water in the glycine production treatment process wherein the solidifying agent preferred proportion be the mass ratio 0.15% of solidifying agent and waste water, the increase of solidifying agent ratio causes cost to increase, solidifying agent reduces then that solidification effect reduces.Temperature is 85 ℃ of two effects, and an effect temperature is 120 ℃.Temperature is excessively low, and evaporation time is long, excess Temperature, and then viscosity increases the solidifying agent input amount needs to increase, and cost improves.
Beneficial effect of the present invention is: the at present production of amino acetic acid in China is mainly produced glycine technology as main take chloroactic acid method, and this technique has formed a large amount of ammonium chloride waste-waters, and the method for domestic processing ammonium chloride waste-water mostly adopts economic benefits and social benefits or multiple-effect evaporation.But in evaporative process, a large amount of formaldehyde can occur owing to contain the decomposition of the catalyzer urotropine in glycine reactant stage in the waste water, and the organism such as amino acid in formaldehyde and the waste water form viscous substance.These viscous substances are difficult to distill and solidliquid mixture that water capacity is large running up to a certain degree to form, and have caused very large difficulty to wastewater treatment.The present invention adopts the method that adds solidifying agent on existing basis of processing ammonium chloride waste-water, effectively reduce the amount of one of the component that can form viscous substance in waste water formaldehyde, thereby stoped the formation of viscous substance, be beneficial to the circular treatment of waste water, the accumulation of elimination viscous substance, fundamentally solve formation and the accumulation of viscous substance, so that the processing of ammonium chloride waste-water can be carried out smoothly, solved the problem that waste water can't thoroughly be administered.
Embodiment
Embodiment 1,To add 2nd effect evaporator from rectifying tower about 54kg ammonium chloride waste-water out, carrying out sending into 1st effective evaporator after two effects are evaporated 0.5 hour under 80-90 ℃, and adding solidifying agent trimeric cyanamide 95g, the temperature of one effect evaporation is controlled at 120 ℃, to be seen when having solid to separate out, stop evaporation, solid 15kg is filtered to get in cooling, gets filtrate 26L.Filtrate is repeated the aforesaid operations iterative cycles.
Embodiment 2,To add 2nd effect evaporator from rectifying tower about 55kg ammonium chloride waste-water out, carrying out two effect evaporations under 80-90 ℃ after 1 hour, send into 1st effective evaporator, and adding solidifying agent trimeric cyanamide 60g, the temperature of one effect evaporation is controlled at 130 ℃, and is to be seen when having solid to separate out, stopped heating, solid 14kg is filtered to get in cooling, gets filtrate 27L.Filtrate is repeated the aforesaid operations iterative cycles.
Claims (2)
- A chloroactic acid method prepare glycine produce in the treatment process of ammonium chloride waste-water, it is characterized in that, steps of the method are:At first ammonium chloride waste-water is joined 2nd effect evaporator, evaporated 5% one 10% moisture content 80-90 ℃ of lower two effect evaporations in 0.5-2 hour;Secondly will join 1st effective evaporator through the waste water of above-mentioned two effect evaporations, and adding solidifying agent trimeric cyanamide, the mass ratio of solidifying agent trimeric cyanamide and ammonium chloride waste-water is 0.1%～1%, 110-135 ℃ of next effect evaporation 2-4 hour, the formaldehyde that solidifying agent and waste water produce in evaporative process forms nontoxic solid, to be seen when having solid to separate out, stopped heating;Then cooling removes by filter the solids such as ammonium chloride, and filtration temperature is controlled at 30-40 ℃;Gained filtrate is repeated aforesaid operations form circulation.
- 2. a kind of chloroactic acid method according to claim 1 prepares the treatment process of ammonium chloride waste-water in the glycine production, it is characterized in that the mass ratio 0.15% of solidifying agent and ammonium chloride waste-water; The temperature of reaction of two effect evaporations is controlled at 85 ℃, and the temperature of reaction of an effect evaporation is controlled at 120 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013100053131A CN103011484A (en) | 2013-01-08 | 2013-01-08 | Method for treating ammonium chloride wastewater during production of glycin prepared based on chloroacetic acid method |
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| CN2013100053131A CN103011484A (en) | 2013-01-08 | 2013-01-08 | Method for treating ammonium chloride wastewater during production of glycin prepared based on chloroacetic acid method |
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| CN103011484A true CN103011484A (en) | 2013-04-03 |
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| CN2013100053131A Pending CN103011484A (en) | 2013-01-08 | 2013-01-08 | Method for treating ammonium chloride wastewater during production of glycin prepared based on chloroacetic acid method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109651182A (en) * | 2019-02-21 | 2019-04-19 | 湖北泰盛化工有限公司 | A kind of cleaning method of Production of Ammonium Chloride waste water |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109651182A (en) * | 2019-02-21 | 2019-04-19 | 湖北泰盛化工有限公司 | A kind of cleaning method of Production of Ammonium Chloride waste water |
| CN109651182B (en) * | 2019-02-21 | 2021-09-07 | 湖北泰盛化工有限公司 | Clean treatment method of ammonium chloride production wastewater |
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Application publication date: 20130403 |