Coking wastewater treatment method with lignite and semi-coke used as novel adsorbent

A technology for coking wastewater and treatment methods, which is applied in the direction of adsorption water/sewage treatment, water/sewage treatment, chemical instruments and methods, etc., can solve the problems that lignite cannot be directly used, the effect of adsorption and removal is poor, and the treatment cost is high, so as to improve Wastewater treatment efficiency, low price, good adsorption effect

Inactive Publication Date: 2019-09-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if only lignite is used as raw material to prepare coking wastewater adsorbent to treat coking wastewater, the adsorption and removal effect is poor,

Method used

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  • Coking wastewater treatment method with lignite and semi-coke used as novel adsorbent
  • Coking wastewater treatment method with lignite and semi-coke used as novel adsorbent

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Experimental program
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Effect test

Embodiment 1

[0044] In this embodiment, a coking wastewater treatment method using lignite and semi-coke as a novel adsorbent comprises the following steps:

[0045] (1) Brown coal is pulverized to 3mm in the roller crusher, and semi-coke is crushed to 5mm in the roller crusher, and semi-coke and lignite powder meeting the requirements are obtained by screening;

[0046] (2) According to the ratio of 1:1, semi-coke and lignite are used to carry out continuous countercurrent relative movement and high-intensity full mixing of semi-coke and lignite powder with a strong mixer, in order to achieve mixed granulation of the original powder of semi-coke lignite, Obtain semi-coke-brignite mixed pellets;

[0047] (3) Activate the semi-coke-lignite mixed pellets obtained in step (2) under water vapor at 130°C, and use the surplus 130°C low-temperature hot air in iron and steel enterprises for drying treatment to make a mixed adsorbent to replace the existing coking Activated carbon as traditional a...

Embodiment 2

[0053] In this embodiment, a coking wastewater treatment method using lignite and semi-coke as a novel adsorbent comprises the following steps:

[0054] (1) Brown coal is pulverized to 3mm in the roller crusher, and semi-coke is crushed to 5mm in the roller crusher, and semi-coke and lignite powder meeting the requirements are obtained by screening;

[0055] (2) The semi-coke and lignite are mixed according to the ratio of 2:1, and the semi-coke and lignite powder are continuously mixed with high-intensity countercurrent relative motion by a powerful mixer, in order to achieve the mixed granulation of the original powder of the semi-coke lignite, Obtain semi-coke-brignite mixed pellets;

[0056] (3) Activate the semi-coke-brignite mixed pellets obtained in step (2) under 130 DEG C of water vapor, and use the surplus hot air of 180 DEG C in iron and steel enterprises to carry out drying treatment to make a mixed adsorbent;

[0057] (4) Put the mixed adsorbent into the adsorpti...

Embodiment 3

[0062] In this embodiment, a coking wastewater treatment method using lignite and semi-coke as a novel adsorbent comprises the following steps:

[0063] (1) Brown coal is pulverized to 3mm in the roller crusher, and semi-coke is crushed to 5mm in the roller crusher, and semi-coke and lignite powder meeting the requirements are obtained by screening;

[0064] (2) semi-coke and lignite are mixed and granulated according to a ratio of 3:1 to obtain semi-coke-lignite mixed pellets;

[0065] (3) Activate the semi-coke-brignite mixed pellets obtained in step (2) under 130°C water vapor, and use the surplus 130°C low-temperature hot air in iron and steel enterprises to carry out drying treatment to make a mixed adsorbent;

[0066] (4) Put the mixed adsorbent into the adsorption column, the effective adsorption height of the adsorption column is 1.5m, and pass coking wastewater into the adsorption column (control the mass ratio of coking wastewater and adsorbent to be 15:1; 2L / min), ...

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Abstract

The invention discloses a coking wastewater treatment method with lignite and semi-coke used as a novel adsorbent, and belongs to the technical field of treatment of coking wastewater. The coking wastewater treatment method with the lignite and the semi-coke used as the novel adsorbent comprises the following steps of (1) crushing the semi-coke and the lignite, and then conducting screening to obtain semi-coke powder and lignite powder with preserved particle size; (2) mixing the semi-coke powder and the lignite powder according to a set ratio for granulation so as to obtain semi-coke-lignite mixed spherical particles; (3) conducting activation and drying treatment on the semi-coke-lignite mixed spherical particles to produce a mixed adsorbent; (4) conducting adsorption operation on coking wastewater by means of the mixed adsorbent; and (5) taking out the humid mixed adsorbent with saturated adsorption, conducting drying to obtain mixed powder, and using the obtained mixed powder as a coking raw material or a sintering process fuel or a blast furnace injection fuel to achieve secondary utilization of the adsorbent. The method is suitable for large-scale treatment of coking wastewater, has a good adsorption effect and is low in cost, secondary utilization of the semi-coke and lignite mixed powder adsorbent is achieved, and the treatment cost of the coking wastewater is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of coking wastewater treatment, and in particular relates to a coking wastewater treatment method using lignite and semi-coke as novel adsorbents. Background technique [0002] Coking wastewater is produced during coal thermal processing, from coal washing, coke quenching, by-product processing and refining in the coking process. At the same time, some wastewater is also produced in the process of gas purification and chemical product recovery. Its water quality is complex, with a wide variety of components and a high concentration of pollutants. In addition to inorganic pollutants such as ammonia, cyanide, and thiocyanate, it also contains phenol, oil, naphthalene, pyridine, quinoline, anthracene, and other fused ring aromatics. Compounds, etc., are currently one of the most difficult wastewater to treat. [0003] At present, the conventional treatment technology of domestic coking wastewater can be divide...

Claims

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Application Information

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IPC IPC(8): B01J20/20B01J20/28B01J20/30C02F1/28C02F101/30
CPCB01J20/20B01J20/28019B01J2220/4875C02F1/281C02F2101/30
Inventor 卢云飞杨浩钰潘建郭正启
Owner CENT SOUTH UNIV
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