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Method for preparing water gas from organic hazardous waste

A water gas and hazardous waste technology is applied in the field of using organic hazardous waste to prepare water gas, and can solve the problems of poor dioxin control effect, low treatment efficiency of organic hazardous waste, and inability to recycle and utilize resources.

Inactive Publication Date: 2018-08-17
绍兴凤登环保有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned technical problems of the prior art, the object of the present invention is to provide a method for preparing water gas by utilizing organic hazardous waste, which effectively solves the problems of low treatment efficiency of some organic hazardous waste, poor dioxin control effect, Resources cannot be recycled, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The residue after the production and recovery of DMF solvent from synthetic leather is made to pH 7-9 by adding acid or alkali;

[0026] The raw coal is made into small pieces of fine coal through a rolling screen and a crusher; water and coal-water slurry additives are added, and the DMF residue is added according to the ratio of coal: DMF residue = 10:1. The liquid is stirred in the middle underground tank, passed through the vibrating screen, and the coal water slurry with a concentration of 55-65% is obtained, and is transported to the finished product tank by the slurry pump, stirred, and set aside;

[0027] The air is cryogenically separated by the air separation equipment to produce pure oxygen. After the oxygen is compressed, it passes through a special nozzle together with the coal water slurry and is sprayed into the gasifier. Gasification and cracking reactions to produce CO, CO 2 、H 2 , N 2 and hydrogen sulfide and other substances of water gas;

[0028]...

Embodiment 2

[0031] Waste solvents containing toluene, methyl ethyl ketone, ethyl acetate, xylene and corresponding paints, inks, paints and other substances are obtained from paint, ink, paint and other industries, and the ash content is controlled to be ≤ 10%;

[0032] The raw coal is made into pulverized coal with a mesh size of less than 200 through rolling screens and crushers;

[0033] The air is cryogenically separated by the air separation equipment to produce pure oxygen, and the compressed oxygen, water vapor, coal powder and waste solvent are sprayed into the gasifier through the respective / or the same nozzle, and the temperature is 1450~1550℃, 4.0~4.1 Gasification and cracking reactions are carried out under MPa high temperature and high pressure conditions to generate CO, CO 2 、H 2 , N 2 and hydrogen sulfide water gas;

[0034] High-temperature water gas (about 1350°C) enters the quenching chamber and is quenched by 250°C hot water to obtain water gas at 240°C and 3.9MPa. ...

Embodiment 3

[0037] Rectification waste obtained from pesticide production, with a fluorine content of ≤0.2%;

[0038] The raw coal is made into small pieces of fine coal through a rolling sieve and a crusher; add water and coal-water slurry additives, and add pesticide rectification residues according to the ratio of coal: pesticide distillation residues = 20:1, stir evenly, and send to The ball mill is ground into liquid, stirred in the middle underground tank, and passed through the vibrating screen to obtain a coal-water slurry with a concentration of 55-65%, which is transported to the finished product tank by a slurry pump, stirred, and set aside;

[0039] The air is cryogenically separated by air separation equipment to produce pure oxygen, and the compressed oxygen and coal-water slurry are sprayed into the gasifier through respective / or the same nozzle, and are heated at 1350-1450°C, 4.0-4.1MPa at high temperature and high pressure Gasification and cracking reactions are carried o...

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PUM

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Abstract

The invention relates to a method for preparing water gas from organic hazardous waste. The method comprises the following steps: (1) removing strong oxidizing substances contained in the organic hazardous waste, and adjusting the pH to be 6 to 9; (2) blending different organic hazardous waste into a homogeneous mixture with a certain heat value; (3) preparing the organic hazardous waste and / or coal into a fluid or powder; (4) feeding the organic hazardous waste and / or coal into a gasifier, and carrying out a gasification and pyrolysis reaction under a high temperature condition to produce water gas; (5) chilling the obtained water gas of which the temperature is 1,000 DEG C or more with water of 100 to 250 DEG C to obtain small molecular water gas of 250 DEG C or less; (6) entering different processing procedures according to different subsequent processes to obtain methanol, ammonia, ethylene glycol or olefin. By adopting the method, the problems of low treatment efficiency for a part of organic hazardous waste, poor dioxin control effect, incapability of recycling resources and the like in the existing incineration technology are solved effectively.

Description

technical field [0001] The invention relates to a method for treating organic hazardous waste, in particular to a method for preparing water gas by utilizing organic hazardous waste. Background technique [0002] At present, the centralized treatment and disposal methods of hazardous waste mainly include landfill and incineration, among which organic hazardous waste is generally incinerated. The general temperature of the incineration method is 900-1000°C, which not only consumes a large amount of fuel, but also has difficulty in guaranteeing the treatment effect of organic hazardous waste containing PCBs and other refractory substances. At the same time, the incineration method will produce a variety of secondary pollutants, including fly ash, sulfur oxides, nitrogen oxides, heavy metals, and dioxins. The current incineration technology has limited control effects on heavy metals and dioxins. With the improvement of environmental protection standards, the pressure on the...

Claims

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Application Information

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IPC IPC(8): C10J3/48C10J3/72
CPCC10J3/48C10J3/72C10J2300/0946C10J2300/1656C10J2300/1665Y02E50/30
Inventor 王明霞章磊董强富周忠虎张浙锦梁华王浩祥李安安陈新
Owner 绍兴凤登环保有限公司
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