CN101982207B - Method for treating wastes generated in the synthetic processes of methylamine and dimethyl formamide - Google Patents
Method for treating wastes generated in the synthetic processes of methylamine and dimethyl formamide Download PDFInfo
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- CN101982207B CN101982207B CN 201010505741 CN201010505741A CN101982207B CN 101982207 B CN101982207 B CN 101982207B CN 201010505741 CN201010505741 CN 201010505741 CN 201010505741 A CN201010505741 A CN 201010505741A CN 101982207 B CN101982207 B CN 101982207B
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Abstract
A method for treating wastes generated in the synthetic processes of methylamine and dimethyl formamide comprises the following steps: (1) firstly using the waste water generated in the synthetic process of methylamine to dissolve the solid residues filtered in the synthetic process of dimethyl formamide; (2) mixing the liquid obtained in the step (1) with coal dust to prepare coal water slurry; and (3) burning the coal water slurry obtained in the (2) as fuel and condensing the obtained water vapor to water. The method has the following advantages: the solid residues filtered in the synthetic process of dimethyl formamide are sodium salts, mainly sodium carbonate, thus being extremely easy to be soluble in water, and can be directly transmitted to the destination via the pipeline, thus avoiding secondary pollution.
Description
Technical field
The present invention relates to a kind of chemical industry treatment of wastes produced method, particularly a kind of method of handling the refuse that is produced in methylamine and the dimethyl formamide building-up process.
Background technology
The refuse that is produced in methylamine and the dimethyl formamide building-up process comprises: the residue in methylamine waste water and the dimethyl formamide filter, and the out-of-date methods of present two kinds of treatments of wastes produced mainly use biochemical method to handle waste water; Method with filtration, landfill is handled residue.
The shortcoming of present method:
1, the biochemical treatment investment is big, and when waste water composition and changes in flow rate, treatment effect differs greatly, and contamination accident may take place;
2, handle residue with the method for filtration, landfill, secondary pollution can take place in the filter residue of filtration in the process of cleaning entrucking, the processing mode that landfill is backward especially, and the land resource that waste is valuable, and can produce contaminated water source.
Summary of the invention
The object of the present invention is to provide a kind of economy and do not produce the method for the refuse that is produced in processing methylamine and the dimethyl formamide building-up process of secondary pollution.
For realizing the object of the invention, the present invention adopts following method:
A kind of method of handling the refuse that is produced in methylamine and the dimethyl formamide building-up process wherein, may further comprise the steps:
(1) earlier with the solid residue that filters out in the waste water dissolving dimethyl formamide building-up process that produces in the methylamine distillation process;
(2) liquid and the coal dust with gained in (1) step is mixed and made into water-coal-slurry;
(3) with the burning that acts as a fuel of the water-coal-slurry of gained in (2) step, with the water vapor condensation Cheng Shui of gained.
The present invention handles the method for the refuse that is produced in methylamine and the dimethyl formamide building-up process, and wherein, the liquid of step (1) gained and the weight ratio of coal dust are: 30～40: 60～70.
The present invention handles the method for the refuse that is produced in methylamine and the dimethyl formamide building-up process, and wherein, the particle mean size of coal dust is 30～60 μ m.
The present invention handles the method for the refuse that is produced in methylamine and the dimethyl formamide building-up process, and wherein, the particle diameter of coal is less than 0.5mm in the water-coal-slurry dispersion.
The present invention handles the method for the refuse that is produced in methylamine and the dimethyl formamide building-up process, and wherein, the particle diameter of coal partly accounts for 80% of dispersion weight percentage less than 0.05mm in the water-coal-slurry.
Advantage of the present invention is:
1, the solid residue that filters out in the dimethyl formamide building-up process, this residue are that sodium salt is mainly sodium carbonate, and be very easily water-soluble, can directly send into the destination through pipeline, avoids secondary pollution.
2, can reduce expenses; Mainly be that the coal slurry that makes up water burns in gasification furnace the part heat can be provided because contain organic matter in (1) waste water and residue, and generate carbon dioxide, water and nitrogen oxide; Preceding two kinds is not pollutant; Nitrogen oxide forms stable sodium salt with sodium carbonate etc. in water, not only can not pollute, and practice thrift expense; (2) waste water in the production of methylamine, this waste water mainly by steam condensate aborning reuse obtain, therefore, do not contain other mechanical admixture except organic matter and alkali lye; Metal ion content etc., water quality is better, uses this waste water can improve the pH value of Heisui River system; Effectively prevent Corrosion of Pipeline, the waste water direct dissolved residue of can lowering the temperature, temperature has certain reduction in long-distance course of conveying; Adjust temperature before the coal blending again, like this can the economized cycle cooling water inflow, the reduction expense; (3) in the coal gasification process, sodium carbonate liquor liquid can with the reaction of sulfide in the coal gas, reduce the load of desulfurization process, the sodium salt fusing point is lower simultaneously, the allocating the ash fusion point that helps to reduce coal into and can reduce expenses of this waste water.
Further the present invention will be described through the specific embodiment below.
The specific embodiment
Embodiment 1
The solid residue amount that produce the every day in step 1, Huaihe River, the Anhui joint-stock company dimethyl formamide building-up process in the filter device therefor is 2 tons; About 800 tons of the waste water every day that produces in Huaihe River, the Anhui joint-stock company methylamine distillation process; With 2 tons of solid residues in the filter device therefor in 800 tons of waste water dissolving dimethyl formamide building-up processes that produce in the methylamine distillation process; The concentration of sodium carbonate is 0.2% in the liquid of gained, COD value (Chemical Oxygen Demand, COD) 5474mg/L, pH value be 10.5;
Step 2, be that coal dust and 1.1 tons of lignin of 30～60 μ m stirred 1 hour, remove particle diameter greater than removing the part of particle diameter greater than 0.5mm with 802 tons of waste water of gained in the step 1,1203 tons particle mean size;
Step 3, with the burning that acts as a fuel of the water-coal-slurry of gained in the step 2, with the water vapor condensation Cheng Shui of gained.
Huaihe River, Anhui joint-stock company water-coal-slurry prepares the workshop, needs every day 1500 tons of clear water to dispose water-coal-slurry, utilizes waste water can reduce 802 tons of clear water magnitude of recruitments.
The wastewater treatment expense is 12 yuan/ton, reduces 9600 yuan of 802 tons of sewage disposal expenses every day, 3,200,000 yuan of annual minimizings.
The residue treatment expense is 110 yuan/ton, reduces 220 yuan of disposal costs every day, 7.3 ten thousand yuan of annual minimizings.
Practice thrift 0.5 yuan/ton in clear water, reduce expenses 401 yuan every day, 140,000 yuan of annual saving.
COD in the waste water and residue mixture＞5000, pH value can provide certain heat 10～11 in gasification furnace, the alkaline matter that replenishes when reducing coal blending is simultaneously reduced expenses 150,000 yuan every year.
Embodiment 2
The solid residue amount that produce the every day in step 1, Huaihe River, the Anhui joint-stock company dimethyl formamide building-up process in the filter device therefor is 2 tons; About 800 tons of the waste water every day that produces in Huaihe River, the Anhui joint-stock company methylamine distillation process; With 2 tons of solid residues in the filter device therefor in 800 tons of waste water dissolving dimethyl formamide building-up processes that produce in the methylamine distillation process; The concentration of sodium carbonate is 0.2% in the liquid of gained, COD value (Chemical Oxygen Demand, COD) 5480mg/L, pH value be 10.4;
Step 2, be that coal dust and 12 tons of lignin of 30～60 μ m stirred 1 hour, remove particle diameter greater than removing the part of particle diameter greater than 0.5mm with 802 tons of waste water of gained in the step 1,1604 tons particle mean size;
Step 3, with the burning that acts as a fuel of the water-coal-slurry of gained in the step 2, with the water vapor condensation Cheng Shui of gained.
Embodiment 3
The solid residue amount that produce the every day in step 1, Huaihe River, the Anhui joint-stock company dimethyl formamide building-up process in the filter device therefor is 2 tons; About 800 tons of the waste water every day that produces in Huaihe River, the Anhui joint-stock company methylamine distillation process; With 2 tons of solid residues in the filter device therefor in 800 tons of waste water dissolving dimethyl formamide building-up processes that produce in the methylamine distillation process; The concentration of sodium carbonate is 0.2% in the liquid of gained, COD value (Chemical Oxygen Demand, COD) 5470mg/L, pH value be 10.6;
Step 2, be that coal dust and 5.8 tons of lignin of 30～60 μ m stirred 1 hour, remove particle diameter greater than removing the part of particle diameter greater than 0.5mm with 802 tons of waste water of gained in the step 1,1500 tons particle mean size;
Step 3, with the burning that acts as a fuel of the water-coal-slurry of gained in the step 2, with the water vapor condensation Cheng Shui of gained.
Above embodiment describes preferred implementation of the present invention; Be not that scope of the present invention is limited; Design under the prerequisite of spirit not breaking away from the present invention; Various distortion and improvement that those of ordinary skills make technical scheme of the present invention all should fall in the definite protection domain of claims of the present invention.
Claims (3)
1. a method of handling the refuse that is produced in methylamine and the dimethyl formamide building-up process is characterized in that, may further comprise the steps:
(1) earlier with the solid residue that filters out in the waste water dissolving dimethyl formamide building-up process that produces in the methylamine distillation process;
(2) be that coal dust and 1.1 tons of lignin of 30～60 μ m stirred 1 hour with the particle mean size of 802 tons, 1203 tons of the liquid of gained in (1) step, remove the part of particle diameter greater than 0.5mm; Be mixed and made into water-coal-slurry;
(3) with the burning that acts as a fuel of the water-coal-slurry of gained in (2) step, with the water vapor condensation Cheng Shui of gained.
2. a method of handling the refuse that is produced in methylamine and the dimethyl formamide building-up process is characterized in that, may further comprise the steps:
(1) earlier with the solid residue that filters out in the waste water dissolving dimethyl formamide building-up process that produces in the methylamine distillation process;
(2) be that coal dust and 12 tons of lignin of 30～60 μ m stirred 1 hour with the particle mean size of 802 tons, 1604 tons of the liquid of gained in (1) step, remove the part of particle diameter greater than 0.5mm; Be mixed and made into water-coal-slurry;
(3) with the burning that acts as a fuel of the water-coal-slurry of gained in (2) step, with the water vapor condensation Cheng Shui of gained.
3. a method of handling the refuse that is produced in methylamine and the dimethyl formamide building-up process is characterized in that, may further comprise the steps:
(1) earlier with the solid residue that filters out in the waste water dissolving dimethyl formamide building-up process that produces in the methylamine distillation process;
(2) be that coal dust and 5.8 tons of lignin of 30～60 μ m stirred 1 hour with the particle mean size of 802 tons, 1500 tons of the liquid of gained in (1) step, remove the part of particle diameter greater than 0.5mm; Be mixed and made into water-coal-slurry;
(3) with the burning that acts as a fuel of the water-coal-slurry of gained in (2) step, with the water vapor condensation Cheng Shui of gained.
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| CN 201010505741 CN101982207B (en) | 2010-10-13 | 2010-10-13 | Method for treating wastes generated in the synthetic processes of methylamine and dimethyl formamide |
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| CN104531242B (en) * | 2014-12-08 | 2016-05-11 | 西北化工研究院 | A kind of method of preparing water-coal-slurry with methylamine waste water |
| CN106475393A (en) * | 2015-08-27 | 2017-03-08 | 中国石油化工股份有限公司 | A kind of acetic acid residue method for innocent treatment |
| CN106315953B (en) * | 2016-09-09 | 2019-03-12 | 福州大学 | A kind of waste water advanced recovery processing technique of synthetic leather and device |
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| US4777024A (en) * | 1987-03-06 | 1988-10-11 | Fuel Tech, Inc. | Multi-stage process for reducing the concentration of pollutants in an effluent |
| CN101050183A (en) * | 2006-04-07 | 2007-10-10 | 山东华鲁恒升化工股份有限公司 | New type production system for methylamine, and new technique for producing methylamine by using the system |
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