Low-cost and high-efficiency treatment technology for coking and semi-coke wastewater

A technology of semi-coke wastewater and treatment process, which is applied in water/sewage treatment, biological water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of high cost of semi-coke wastewater and poor treatment effect, and achieve saving Cost savings, low water vapor content, and reduced energy consumption

Pending Publication Date: 2019-11-26
石家庄惠洁科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention proposes a low-cost and high-efficiency treatment process for coking and semi-coke wastewater, which solves the problems of high cost and poor treatment effect of coking and semi-coke wastewater in the prior art

Method used

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  • Low-cost and high-efficiency treatment technology for coking and semi-coke wastewater
  • Low-cost and high-efficiency treatment technology for coking and semi-coke wastewater
  • Low-cost and high-efficiency treatment technology for coking and semi-coke wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Such as figure 1 As shown, a low-cost and high-efficiency treatment process for coking wastewater includes the following steps:

[0030] S1. Degreasing

[0031] Coal tar, suspended oil and suspended solids with large particles were removed from the coking wastewater to obtain deoiled coking wastewater; wherein, the coking wastewater was from Maanshan Iron and Steel Co., Ltd., and the COD in the coking wastewater was 5000mg / L;

[0032] S2. High negative pressure enhanced gas stripping to remove ammonia

[0033] The deoiled coking and semi-coke wastewater obtained in step S1 is subjected to high negative pressure enhanced gas stripping at -0.05MPa and 35-50°C to obtain gas phase ammonia and liquid phase wastewater; the gas phase ammonia is cooled to obtain a mass concentration of 20 % ammoniacal liquor, the ammoniacal liquor with mass concentration of 30% can be obtained by using ordinary distillation tower to distill the ammoniacal liquor;

[0034] S3. Adsorption deph...

Embodiment 2

[0039] A low-cost and high-efficiency treatment process for semi-coke wastewater, comprising the following steps:

[0040] S1. Degreasing

[0041] Remove the coal tar, suspended oil and suspended matter with larger particles in the semi-coke wastewater, and obtain the deoiled semi-coke wastewater; wherein, the semi-coke wastewater comes from Shaanxi Coal Industry Chemical Group Co., Ltd., and the COD in the semi-coke wastewater is 5000mg / L;

[0042] S2. High negative pressure enhanced gas stripping to remove ammonia

[0043] The deoiled semi-coke and semi-coke wastewater obtained in step S1 are subjected to high negative pressure enhanced gas stripping at -0.03MPa and 50°C to obtain gas phase ammonia and liquid phase wastewater; the mass concentration of gas phase ammonia is 20% after cooling ammoniacal liquor, the ammoniacal liquor with a mass concentration of 30% can be obtained by using an ordinary distillation tower to distill the ammoniacal liquor;

[0044] S3. Adsorp...

Embodiment 3

[0049] A low-cost and high-efficiency treatment process for semi-coke wastewater, comprising the following steps:

[0050] S1. Degreasing

[0051] Remove the coal tar and suspended oil and suspended solids with larger particles in the semi-coke wastewater to obtain the deoiled semi-coke wastewater; wherein, the semi-coke wastewater comes from Shaanxi Yulin Shaanxi Coal Construction Co., Ltd., and the COD in the semi-coke wastewater is 9000mg / L;

[0052] S2. High negative pressure enhanced gas stripping to remove ammonia

[0053] The deoiled semi-coke and semi-coke wastewater obtained in step S1 are subjected to high negative pressure enhanced gas stripping at -0.08MPa and 35°C to obtain gas phase ammonia and liquid phase wastewater; the mass concentration of gas phase ammonia is 20% after cooling ammoniacal liquor, the ammoniacal liquor with a mass concentration of 30% can be obtained by using an ordinary distillation tower to distill the ammoniacal liquor;

[0054] S3. Ad...

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Abstract

The invention belongs to the technical field of wastewater treatment, and provides a low-cost and high-efficiency treatment technology for coking and semi-coke wastewater. The technology comprises thefollowing steps: S1, deoiling: removing coal tar and large-particle suspended oil and suspended matters in the coking and semi-coke wastewater to obtain deoiled coking and semi-coke wastewater; S2,performing high negative pressure enhanced gas stripping ammonia removal: carrying out high negative pressure enhanced gas stripping on the deoiled coking and semi-coke wastewater obtained in step S1 under -0.08 to -0.03 MPa at 35-50 DEG C in order to obtain gas phase ammonia and liquid phase wastewater; S3, performing adsorbing dephenolization: performing adsorbing dephenolization on the liquid phase wastewater obtained in step S2 by adopting an adsorbent to adsorb phenols in the wastewater in order to obtain dephenolized wastewater; and S4, biochemically treating effluent: biochemically treating on the dephenolized wastewater obtained in step S3, and discharging the treated water after reaching standards. The technology solves the problems of high cost and poor treatment effect of the coking and semi-coke wastewater in the prior art.

Description

technical field [0001] The invention belongs to the technical field of wastewater treatment and relates to a low-cost and high-efficiency treatment process for coking and semi-coke wastewater. Background technique [0002] Coking plants are an important part of the production of iron and steel enterprises. Coke is an important raw material for iron and steel smelting, and the chemical products recovered from coking are supplied to the production of many industries. The main task of the coking plant is to carry out high-temperature dry distillation of coal-coking, and to recycle the by-products produced in the coking process. Coking wastewater is industrial wastewater containing volatile phenols, polycyclic aromatic hydrocarbons, oxygen, sulfur, nitrogen and other heterocyclic compounds produced during the high-temperature dry distillation, purification and recovery of by-products of coking and gas. It is a kind of industrial wastewater with high CODcr, high phenol value, hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F101/16C02F101/34
CPCC02F1/10C02F1/285C02F1/40C02F3/00C02F9/00C02F2101/16C02F2101/345C02F2303/14
Inventor 吕志芦远卓
Owner 石家庄惠洁科技有限公司
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