Biochemical sludge processing method

A biochemical sludge and treatment method technology, applied in pyrolysis treatment of sludge and other directions, can solve problems such as unsuitable land use, occupy large land, damage the environment, etc., achieve good economic and social benefits, reduce equipment investment, save energy effect of cost

Inactive Publication Date: 2014-12-31
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biochemical sludge produced by the treatment of chemical wastewater is not suitable for land use due to its high organic content; landfill will produce seepage that will damage the environment and occupy a large amount of land, so the landfill treatment method is gradually banned by various countries; The water content of biochemical sludge is as high as 96-99%, and it is also as high as 70%-85% after mechanical dehydration. Sludge incineration must first dry the sludge, usually after mechanical drying, and then go through percolation or evaporation Remove most of the moisture in the sludge and then incinerate it. The cost of building an incineration device is very high, and the smoke pollution and waste residue generated during the incineration process also require corresponding post-treatment measures, so the use of incineration to treat biochemical sludge is also subject to great restrictions

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1: 70 parts of coal, 0.5 part of biochemical sludge with a water content of 75%, 30 parts of cyclohexanone wastewater and 0.5 part of lignosulfonate are added to a rod mill according to the mass ratio, and the rod mill forms water coal Slurry, coal water slurry viscosity in 700 ~ 1400mPa. Between S, in line with the process requirements. Pump the prepared coal-water slurry to the coal slurry tank for storage, and use the diaphragm pump to transport the coal-water slurry in the coal slurry tank to the raw material inlet of the Texaco coal gasifier. The oxygen-coal ratio is 480, and the coal-water slurry And oxygen enters the gasification layer of the Texaco coal gasifier, gasifies at 1350°C to generate process gas and produces slag, and the sludge in the coal-water slurry is completely gasified at 1350°C. After the process gas enters the quenching section, it is discharged from the process gas outlet, and hydrogen is obtained through the subsequent purification ...

Embodiment 2

[0051] Example 2: 60 parts of coal, 5 parts of biochemical sludge with a water content of 85%, 40 parts of nitrobenzene wastewater and 1 part of humate are added to the rod mill according to the mass ratio, and the rod mill forms a coal-water slurry , CWS viscosity in 700 ~ 1400mPa. Between S, in line with the process requirements. The prepared coal water slurry is pumped to the coal slurry tank for storage, and the diaphragm pump is used to transport the coal water slurry in the coal slurry tank to the raw material inlet of the Texaco coal gasifier, and the coal water slurry and oxygen enter the Texaco The gasification layer of the coal gasification furnace, with an oxygen-to-coal ratio of 500, is gasified at 1400°C to generate process gas and slag, and the sludge in the coal-water slurry is completely gasified at 1400°C. After the process gas enters the quenching section, it is discharged from the process gas outlet, and hydrogen is obtained through the subsequent purificat...

Embodiment 3

[0052] Example 3: 65 parts of coal, 3 parts of biochemical sludge with a water content of 80%, 35 parts of nitrochlorobenzene waste water and 0.1 part of naphthalenesulfonic acid formaldehyde condensate are added to the rod mill according to the mass ratio, and the rod mill forms Coal water slurry, the viscosity of coal water slurry is 700~1400mPa. Between S, in line with the process requirements. The prepared coal water slurry is pumped to the coal slurry tank for storage, and the diaphragm pump is used to transport the coal water slurry in the coal slurry tank to the raw material inlet of the Texaco coal gasifier, and the coal water slurry and oxygen enter the Texaco The gasification layer of the coal gasifier has an oxygen-to-coal ratio of 490. It is gasified at 1380°C to generate process gas and slag. The sludge in the coal-water slurry is completely gasified at 1380°C. After the process gas enters the quenching section, it is discharged from the process gas outlet, and h...

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Abstract

The invention relates to a biochemical sludge processing method; biochemical sludge is mixed in the preparation of water coal slurry, and the water coal slurry is gasified at high temperature by use of a texaco coal gasification furnace, so that the biochemical sludge is completely gasified for n implementation of harmless biochemical sludge, in the gasification process, the water coal slurry is decomposed into process gas, and the end product is hydrogen. According to the biochemical sludge processing method, the biochemical sludge can be directly used for the preparation of the coal water slurry without drying, so that the cost of drying the biochemical sludge is saved; by use of the texaco coal gasification furnace in the prior art for processing the coal water slurry with the biochemical sludge, biochemical sludge treatment equipment investment is reduced, no new processing equipment is needed, and the method has good economic and social benefits.

Description

technical field [0001] The invention relates to a method for treating biochemical sludge. When preparing coal-water slurry, biochemical sludge is mixed, and the coal-water slurry is passed into a Texaco coal gasifier (the Texaco coal gasifier is used as a gasification device). The high heat generated during the coal gasification process is used to achieve the purpose of sludge treatment. The biochemical sludge is a general term, and the treatment method provided by the present invention can be used for any sludge produced by biochemical treatment of sewage. Background technique [0002] The chemical industry is a traditional pillar industry in my country, and the chemical raw materials and products produced are widely used in various fields. A large amount of wastewater generated in the production process of chemical enterprises is mainly treated by biochemical methods, resulting in a large amount of biochemical sludge. Biochemical sludge has the dual nature of pollution a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10
Inventor 李正琪李昕阳侯秀华魏令勇
Owner CHINA PETROLEUM & CHEM CORP
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