Resourceful treatment method of coal tar residues

A treatment method and technology for coal tar, which are applied in the field of resource treatment of coal tar residue, can solve problems such as reducing economic efficiency, waste of water resources, and affecting product quality, etc., so as to solve the problem of environmental pollution, realize resource utilization, eliminate The effect of secondary pollution

Pending Publication Date: 2021-05-25
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation technology of activated carbon by alkali activation method has the following significant disadvantages: (1) equipment corrosion is serious due to the use of alkali; (2) activated carbon products need to be washed to neutrality, which brings serious waste of water resources and environmental pollution; (3) if Incomplete cleaning will cause activator residues and affect product quality; (4) Extensive use of activators greatly increases the cost of the product and reduces the economy, etc.

Method used

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  • Resourceful treatment method of coal tar residues
  • Resourceful treatment method of coal tar residues
  • Resourceful treatment method of coal tar residues

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The tar residue from a coal gasification company in Xinjiang was taken, and the tar residue was subjected to elemental analysis and industrial analysis. The results are shown in Table 1.

[0034] Table 1

[0035]

[0036] 90g of tar residue was mixed with 10g of anthracite to obtain a mixture. The mixed material was dried and pretreated at 120° C. for 2 hours to obtain a dried material. Among them, the condensable gas is condensed and collected, and the non-condensable gas is subjected to high-temperature combustion treatment after being adsorbed by an acidic solution.

[0037] Put the pulverized dry material into extruder and extrude it into a columnar material with a diameter of 2.5mm. The columnar material is subjected to low-temperature pyrolysis at 500°C for 80min under a nitrogen atmosphere to obtain thermal solution material. The gases produced during the pyrolysis process are mixed with those produced during the drying process for centralized treatment. T...

Embodiment 2-4

[0041] The method of Examples 2-4 is the same as that of Example 1, except that the process parameters are different, see Table 3 for details, the yield of each product is shown in Table 4, and the properties of the prepared activated carbon products are shown in Table 5.

Embodiment 5-6

[0043] The raw material of coal tar slag used in Examples 5-6 is coal pyrolysis tar slag from a coking plant in Shandong, and its water content is 3%. The physical parameters after dehydration are shown in Table 2.

[0044] Table 2

[0045]

[0046] The method of Examples 5-6 is the same as that of Example 1, except that the process parameters are different, see Table 3 for details, the yield of each product is shown in Table 4, and the properties of the prepared activated carbon products are shown in Table 5.

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Abstract

The invention discloses a resourceful treatment method of coal tar residues, which comprises the following steps of a, mixing the coal tar residues with coal to obtain a mixture, the coal accounting for 5-15% of the total mass of the mixture, and drying and crushing the mixture to obtain a crushed material, b, pyrolyzing the crushed material to obtain a pyrolyzed material, and c, adding an activating agent into the pyrolyzed material for activation, acquiring an activated carbon product, wherein the activating agent is selected from at least one of oxygen, air, carbon dioxide or flue gas, the activation temperature ranges from 800 DEG C to 1200 DEG C, and the activation time ranges from 90 min to 240 min. According to the resourceful treatment method of the coal tar residues, oil in the tar residues can be recycled, and the residual residues can be prepared into an activated carbon product by adopting a low-cost and environment-friendly method, so that zero emission of hazardous wastes is realized.

Description

technical field [0001] The invention belongs to the field of industrial hazardous waste utilization and the field of coal chemical industry, and in particular relates to a resource treatment method of coal tar residue. Background technique [0002] Coal tar residue (referred to as tar residue) is a black or dark brown viscous paste solid discharged during the gasification, coking or pyrolysis process of coal. The composition of tar residue is complex, mainly containing various pollutants such as benzene series, polycyclic aromatic hydrocarbons, nitrogen-containing and sulfur-containing heterocyclic compounds, and heavy metals. It is currently listed as HW11 hazardous waste by the state. [0003] The coal tar residue treatment technologies that have been reported in the literature mainly include solvent extraction separation, mechanical centrifugal separation, flash evaporation-decanter centrifugal separation, free sedimentation (or solvent extraction)-centrifugal separation,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/336C01B32/33C10G1/00C10B53/04
CPCC01B32/336C01B32/33C10G1/002C10B53/04
Inventor 常秋连
Owner CCTEG CHINA COAL RES INST
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