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Method for ammonia removal of coking wastewater

A coking wastewater and ammonia removal technology, applied in chemical instruments and methods, separation methods, water pollutants, etc., can solve the problems of undisclosed ammonia removal, tar removal, high equipment requirements, and large power consumption, etc., and achieve regeneration operation Simple and reliable, low equipment investment and low energy consumption

Inactive Publication Date: 2019-03-12
铜陵泰富特种材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method does not mention the degreasing effect of activated carbon and the effect of degreasing, and the combination of activated carbon and ozone consumes a lot of power, requires high equipment, and is prone to ozone leakage, causing secondary pollution
[0007] In the above-mentioned documents, there is no report on the use of molecular sieves to adsorb deamination and detarring in coking wastewater.

Method used

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  • Method for ammonia removal of coking wastewater

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Experimental program
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Effect test

Embodiment 1

[0035] The specific implementation is as figure 1 As shown in the device process, the coking wastewater with a tar concentration of 181mg / L, a volatile ammonia content of 3g / L (ammonium bicarbonate, free ammonia), and a COD (chemical oxygen demand) of 8000 mg / L is fed into the adsorption The adsorbent is a molecular sieve adsorbent, and the adsorbent is a hydrophobic ZSM-5 molecular sieve; the waste water after adsorption is sent to the storage tank; part of the waste water in the storage tank is reused as cooling water, and part of it is discharged . The tar content in the treated wastewater was 2.2 mg / L, the ammonia nitrogen content was 80 mg / L, and the COD content was 2000 mg / L.

Embodiment 2

[0037] The specific implementation is asfigure 1 As shown in the device process, the coking wastewater containing tar concentration of 200mg / L is sent to the adsorption tower filled with adsorbent, wherein the adsorbent is a molecular sieve adsorbent, and the adsorbent adopts TS-1 molecular sieve; the coking wastewater after adsorption Send it to the storage tank; part of the wastewater in the storage tank is reused as cooling water, and part of it is discharged. The coking wastewater before treatment contains 200 mg / L of tar, 3 g / L of volatile ammonia, and 8000 mg / L of COD. In the coking wastewater after treatment, the content of tar is 3 mg / L, and the content of ammonia nitrogen is 60 mg / L. The COD content is 1500 mg / L.

Embodiment 3

[0039] The specific implementation is as figure 1 As shown in the device process, the coking wastewater containing tar concentration of 220mg / L is sent to the adsorption tower filled with adsorbent, wherein the adsorbent is molecular sieve adsorbent, and the adsorbent adopts Ti-MOR molecular sieve; the coking wastewater after adsorption is sent to into the storage tank; part of the wastewater in the storage tank is reused as cooling water, and part of it is discharged.

[0040] The coking wastewater before treatment contains a tar concentration of 100 mg / L, a volatile ammonia content of 4 g / L, and a COD of 7000 mg / L. In the coking wastewater after treatment, the tar content is 1 mg / L, and the ammonia nitrogen content is 50 mg / L. The COD content is 1000 mg / L.

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Abstract

The invention relates to a treatment method for ammonia removal of coking wastewater, which mainly solves the technical problems of influence on subsequent ammonia distilling efficiency and influenceon running and exhaust of biochemical device of high content of ammonia-nitrogen and tar in the coking wastewater. The treatment method adopts the technical scheme with the following steps of sendingthe coking wastewater with high content of ammonia-nitrogen into an adsorption tower filled with an adsorbent, wherein the adsorbent is a molecular sieve adsorbent; sending the purified water into a water storage tank, and recycling one part of purified water as cooling water, so that the technical problems can be solved. The treatment method is suitable for the industrialized production process of coking wastewater treatment.

Description

technical field [0001] The invention belongs to the field of waste water treatment, in particular to a deammonification method for coking waste water. Background technique [0002] Coking wastewater mainly comes from the process of coking, gas purification and refining of chemical products. It is wastewater containing high concentrations of ammonia nitrogen, phenol, cyanide, oil and toxic and harmful organic substances. The main source is the residual ammonia water with high ammonia nitrogen produced in the nitrogen distillation process. In order to reduce the concentration of ammonia nitrogen in coking wastewater, an ammonia distillation system is usually set up to pretreat the remaining ammonia water. The high ammonia nitrogen in the coking wastewater will increase the load of the ammonia distillation system and increase the amount of alkali, and the correspondingly higher pH value of the ammonia distillation wastewater will affect the treatment efficiency of the subsequen...

Claims

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Application Information

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IPC IPC(8): C02F1/28C02F1/40C02F101/16
CPCC02F1/28C02F1/40C02F2101/16C02F2303/16
Inventor 孙广亿虞文胜马广伟叶青保
Owner 铜陵泰富特种材料有限公司
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