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Waste organic solvent recycling method

An organic solvent and resource-based technology, which is applied in waste fuel, granular/powder fuel gasification, petroleum industry, etc., can solve the problems of unproduct processing, high processing cost, long time consumption, etc., and achieve efficient resource utilization and high efficiency. The effect of safe disposal and resolution of pollution risks

Active Publication Date: 2018-08-17
ZHEJIANG FENGDENG CHEM
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  • Description
  • Claims
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Problems solved by technology

But in fact, in addition to these gaseous substances, dioxins may also be produced, which will still cause harm to the environment
In addition, a variety of toxic and harmful metal salts are also used in the method, and these metal salts may volatilize at high temperatures and also cause harm to the environment
CN105233515A adopts the method of distillation and rectification to process waste organic solvents. The process of this method is relatively complicated, and some organic matter will still remain in the liquid. Therefore, it is difficult to realize its complete separation and utilization
However, this method takes a long time and does not process the incinerated products (gas or solid)
[0007] It can be seen that the following problems still exist in the existing treatment methods about waste organic solvents: (1) harmful substances such as dioxins can be produced in the treatment process, causing secondary pollution; Organic waste; (3) waste will still be generated during the treatment process, which needs further treatment, and the treatment cost is high

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  • Waste organic solvent recycling method

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Embodiment 1

[0075] This embodiment provides a method for resource utilization of waste organic solvents, the method comprising the following steps:

[0076] (1) Mix 19.92t of waste organic solvent produced by Hangzhou Chuanhua Fine Chemical Co., Ltd. with 19.92t of slag washing water and 0.30t of sodium naphthalenesulfonate, the mass ratio of which is 100:100:1.5, and use sulfuric acid solution to adjust the pH value of the mixture For 6.0, prepare the pretreatment solution;

[0077] (2) Mix the pretreatment liquid obtained in step (1) with 26.02t of coal evenly, the mass ratio of waste organic solvent to coal is 100:130.6, and use ball milling to prepare a solid content of 39.32wt% and a viscosity of 630mPa·s coal water slurry;

[0078] (3) spray the coal-water slurry prepared in step (2) into the gasification furnace with a special nozzle, and carry out the gasification reaction for 15 seconds at a temperature of 1450° C. and a pressure of 0.5 MPa in an oxygen-containing atmosphere con...

Embodiment 2

[0083] This embodiment provides a method for resource utilization of waste organic solvents, the method comprising the following steps:

[0084] (1) Mix 5.4t of waste organic solvent produced by Hyosung Chemical Fiber (Jiaxing) with 2.7t of slag flushing water and 0.16t of potassium lignosulfonate, the mass ratio of which is 100:100:3.0, and adjust with sodium hydroxide solution The pH value of the mixed solution is 7.0, and the pretreatment solution is prepared

[0085] (2) Mix the pretreatment liquid obtained in step (1) with 6.28 t of coke evenly, the mass ratio of waste organic solvent to coke is 100:116.3, adopt ball milling treatment, and prepare solid content is 43.2%, viscosity is 740mPa·s CWS;

[0086] (3) Spray the coal-water slurry prepared in step (2) into the gasification furnace with a special nozzle, and carry out the gasification reaction at 1700° C. and a pressure of 1.5 MPa for 2 seconds in an oxygen-containing atmosphere containing 99.7% oxygen, Obtain gas...

Embodiment 3

[0091] This embodiment provides a method for resource utilization of waste organic solvents, the method comprising the following steps:

[0092] (1) Mix 5.0t of organic solvent recovery waste liquid produced by Prodbon Pharmaceuticals with 12.5t of slag washing water and 0.25t of sodium sulfonated humate evenly, with a mass ratio of 100:250:5.0, and adjust with hydrochloric acid solution The pH value of the mixed solution is 5.0, and the pretreatment solution is prepared;

[0093] (2) Mix the pretreatment solution obtained in step (1) with 7.9t of activated carbon evenly, the mass ratio of waste organic solvent to activated carbon is 100:158, and adopt ball milling to prepare a solid content of 30.8wt% and a viscosity of 416mPa·s coal water slurry;

[0094] (3) Spray the coal-water slurry prepared in step (2) into the gasification furnace with a special nozzle, and carry out the gasification reaction for 8 seconds at a temperature of 1100° C. and a pressure of 4.0 MPa in an o...

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Abstract

The invention provides a waste organic solvent recycling method which includes the steps: (1) mixing waste organic solvents, water and auxiliaries and adjusting pH (potential of hydrogen) values to prepare pretreating solution; (2) mixing the pretreating solution with carbon source substances to obtain water-coal-slurry; (3) performing gasification reaction on the water-coal-slurry in oxygen-bearing atmosphere at the temperature of 1100-1700 DEG C under 0.5-4MPa to obtain gaseous products and liquid slag; (4) separating the gaseous products and the liquid slag by chilling to obtain mixed gas and glassy slag. Waste is cooperatively disposed by water-coal-slurry gasification and high-temperature melting, so that the waste organic solvents are decomposed at high temperature in a short time, all elements C, H, O and N in the waste organic solvents are transferred into the gaseous products, the gaseous products are purified and transformed to obtain the mixed gas with high CO2 and H2 content, the mixed gas is used for producing ammonium bicarbonate, and the waste organic solvents are efficiently and safely treated and recycled.

Description

technical field [0001] The invention belongs to the field of harmless disposal and resource utilization of waste organic solvents, and relates to a resource utilization method of waste organic solvents, in particular to a resource of waste organic solvents produced in cleaning and extraction processes in chemical, pharmaceutical and leather industries utilization method. Background technique [0002] In chemical, pharmaceutical and tanning industries, it is necessary to use a large amount of organic solvents as cleaning agents or extraction agents, such as alcohols, ethers, aldehydes, benzene, phenols and esters, etc., some components are single or only two The organic solvents of three components can be reused after evaporation or distillation, but there will still be organic solvent residues to form waste organic solvents, while multi-component organic solvents are difficult to realize the recycling of each component, so they are waste organic solvents. These waste organi...

Claims

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Application Information

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IPC IPC(8): C10L1/32C10J3/46
CPCC10J3/466C10L1/326Y02E50/30
Inventor 陈建李亚平赵楚程燕陶锦华徐旭明王明霞何先标唐量华
Owner ZHEJIANG FENGDENG CHEM
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