Method and system for co-treatment of coking wastewater sludge and tar residues

A technology for coking wastewater and co-processing, applied in chemical instruments and methods, inorganic chemistry, carbon compounds, etc., can solve the problems of inability to achieve resource utilization, instability, and increase in coke oven heat load, and achieve resource utilization and The effect of harmless treatment, increasing porosity and specific surface area, and high economic benefits

Pending Publication Date: 2020-01-21
CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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Problems solved by technology

[0006] (2) The viscosity of tar residue and the volatility of its components will cause the oil residue to stick to the belt conveyor and belt idlers, resulting in uneven coal blending process, and the volatility of tar residue components makes The batching is difficult to be precise, which leads to unstable coke quality and increases the heat load of the coke oven
[0007] (3) Due to the presence of a large amount of polycyclic aromatic hydrocarbons (such as polycyclic aromatic hydrocarbons and benzene) in coking wastewater sludge and tar residue, a large amount of toxic and harmful gases will be produced during incomplete combustion as fuel or coal blending additives, causing atmospheric pollution in coking plants. Up-to-standard discharge increases the difficulty and cost of treatment
[0008] The current treatment methods for these two solid wastes cannot achieve environmentally friendly, green and sustainable resource utilization, and the whereabouts of the final treated pollution cannot be effectively guaranteed, and cannot meet the needs of production and environmental protection

Method used

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  • Method and system for co-treatment of coking wastewater sludge and tar residues

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Embodiment 1

[0038] Such as figure 1 , the embodiment of the present invention provides a method for synergistic treatment of coking wastewater sludge and tar residue, comprising:

[0039] S1, pretreating the coking wastewater sludge and tar residue, reducing the moisture content of the coking wastewater sludge to 30% to 50%, and reducing the moisture content of the tar residue to 70% to 93%;

[0040] S2, mixing and molding the dewatered sludge and dehydrated tar residue to obtain a molding mixture;

[0041] S3, the molding mixture is used as a raw material to prepare activated carbon.

[0042] In the above method, the pretreatment of the coking wastewater sludge is mainly to dehydrate the sludge. In one embodiment, the water content of the coking wastewater sludge is reduced to about 40%. As a preferred scheme, in S1, the pretreatment method of coking wastewater sludge includes:

[0043] S111, add acid-base regulator, ion flocculant, inorganic salt pretreatment agent and demulsifier to...

Embodiment 2

[0057] Such as figure 1 , the embodiment of the present invention provides a system for the co-processing of coking wastewater sludge and tar residue, including a waste material mixing unit 300, a forming unit 400, a carbonization furnace 500, and an activation reaction tower 600 sequentially connected by a material transfer unit; A sludge pretreatment unit for reducing the water content of coking wastewater sludge and a tar residue pretreatment unit for reducing the water content of tar residue, the dewatered sludge outlet of the sludge pretreatment unit and the dehydration of the tar residue pretreatment unit The outlets of the tar residue are respectively connected to the material inlets of the waste mixing unit 300 through screw conveyors.

[0058] As mentioned in Example 1 above, the sludge pretreatment unit is mainly used to reduce the water content of coking wastewater sludge, preferably to reduce the water content of coking wastewater sludge to 30% to 50%, and more pre...

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Abstract

The invention relates to a method and system for co-treatment of coking wastewater sludge and tar residues. The method comprises the following steps: respectively reducing the moisture contents of thecoking wastewater sludge and the tar residues to 30-50% and 70-93% by a pretreatment method; mixing the dehydrated sludge and the dehydrated tar residues, molding, and preparing activated carbon by taking the molded mixture as a raw material. The system comprises a waste mixing unit, a molding unit, a carbonization furnace and an activation reaction tower which are sequentially connected througha material transfer unit. The system also comprises a sludge pretreatment unit and a tar residue pretreatment unit which are respectively used for reducing the water content of the sludge and the tarresidues, and the two pretreatment units are respectively connected with a material inlet of the waste material mixing unit through a spiral conveyor. The dehydrated coking wastewater sludge and tar residues are mixed to prepare the activated carbon, the dehydrated sludge can serve as a carbon-based skeleton structure of the tar residues, the porosity and specific surface area of the activated carbon are increased, cooperative treatment of the coking wastewater sludge and the tar residues is achieved, and the coking wastewater sludge and the tar residues can be turned into wealth.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and in particular relates to a co-processing method of coking wastewater sludge and tar residue and a co-processing system of coking wastewater sludge and tar residue. Background technique [0002] In the process of coking to prepare gas, coke and coal tar, a large amount of industrial solid waste will be produced; in the process of coking production, 0.1% tar residue will be produced in the process unit, and about 100% will be produced in the coking wastewater treatment unit About 0.2% biochemical sludge. Most enterprises fail to properly recycle and utilize the large amount of sludge and tar residue produced. [0003] In the current resource utilization technology in the field of coking, coking wastewater sludge is a semi-dry solid waste with complex rheology due to its complex composition, containing inorganic substances, toxic and harmful substances (such as microorganisms, org...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/324C01B32/342C01B32/39
CPCC01B32/324C01B32/342C01B32/39
Inventor 王文超尹鹏肖国俊赵颖张亭亭
Owner CHINA CITY ENVIRONMENT PROTECTION ENGINEERING LIMITED COMPANY
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