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Treatment method of phenol-cyanogen wastewater generated by coal gas generation furnace

A technology of gas generator and treatment method, which is applied in biological water/sewage treatment, multi-stage water treatment, water/sewage treatment, etc., can solve the problem of unstable treatment effect of biochemical treatment method, large investment in coal-water slurry preparation system, Deal with high cost problems, achieve obvious economic and environmental benefits, avoid inhibition, and reduce pollution

Inactive Publication Date: 2017-05-17
SICHUAN NORMAL UNIVERSITY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

The biochemical treatment method has unstable treatment effect and high cost; although the separate incineration method has a good treatment effect, the treatment cost is high; the coal-water slurry preparation system of the coal-water slurry treatment method has a large investment, and many manufacturers do not have this system, so it is difficult implement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] Example 1: Treat 1m per day 3 Phenol cyanide wastewater (pH8.2, COD Cr 8400mg / L, volatile phenol 950mg / L, CN - 4.2mg / L, T-N120mg / L), after iron-zinc composite powder reduction (add 5g of iron-zinc composite powder per liter of wastewater, time 4h, 25°C, CO 2 Pressure 0.1MPa), hydrolytic acidification (24h, pH6.0), aerobic biochemical (12h) and activated carbon biological filter tower (hydraulic load is 40m 3 / m 2 .d, the total thickness of activated carbon is 2m) treatment, the effluent water quality is COD Cr 84mg / L, CN - 0.18mg / L, volatile phenol 0.36mg / L, T-N 18mg / L.

Embodiment 2

[0008] Embodiment 2: 20m is processed every day 3 Phenol cyanide wastewater (pH8.1, COD Cr 8900mg / L, volatile phenol 1050mg / L, CN - 4.6mg / L, T-N115mg / L), after iron-zinc composite powder reduction (add 10g of iron-zinc composite powder per liter of wastewater, time 2h, 45℃, CO 2 Pressure 0.3MPa), hydrolytic acidification (8h, pH8.0), aerobic biochemical (8h) and porous ceramsite biological filter tower (hydraulic load is 100m 3 / m 2 .d. The total thickness of porous ceramsite is 4m), and the effluent quality is COD Cr 84mg / L, CN - 0.12mg / L, volatile phenol 0.34mg / L, T-N 16mg / L.

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Abstract

The invention provides a treatment method of phenol-cyanogen wastewater generated by a coal gas generation furnace. The treatment method comprises the treatment procedures of filtering, reducing iron-zinc composite powder by pressurizing CO2, precipitating, carrying out hydrolytic acidification, carrying out aerobic treatment, treating by a biological filter tower and the like; and the treated wastewater can be discharged after stably reaching standards.

Description

technical field [0001] The invention relates to a treatment method for phenol cyanide wastewater produced by a gas generator. Background technique [0002] Coal gas is a kind of fuel widely used in production and life. It is produced from coal through a series of chemical reactions in a gas generator. In the process of preparing cold gas, phenol-cyanide wastewater (wastewater containing phenol and cyanide) will inevitably be produced. If the wastewater is directly discharged into the environment, it will cause serious pollution to the environment. At present, the treatment methods of phenol cyanide wastewater mainly include biochemical treatment method, separate incineration method, coal water slurry treatment method and raw material treatment method mixed into drying tower. The biochemical treatment method has unstable treatment effect and high cost; although the separate incineration method has a good treatment effect, the treatment cost is high; the coal-water slurry pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/30C02F101/34C02F101/18
CPCC02F1/66C02F1/705C02F3/30C02F3/34C02F9/00C02F2001/007C02F2003/001C02F2003/003C02F2101/18C02F2101/345C02F2301/046C02F2301/08
Inventor 龙炳清崔伟陈刚
Owner SICHUAN NORMAL UNIVERSITY
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