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Purification method of coking wastewater

A technology for coking wastewater and wastewater, which is applied in chemical instruments and methods, separation methods, water pollutants, etc., can solve the problems of not mentioning the effect of ammonia removal and ammonia removal by activated carbon, high equipment requirements, ozone leakage, etc., and achieve regeneration. Simple and reliable operation, low equipment investment and short process

Inactive Publication Date: 2019-03-15
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 effect of activated carbon on ammonia removal and ammonia removal, 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 public report on the use of molecular sieves to adsorb tar and ammonia nitrogen in coking wastewater.

Method used

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  • Purification method of coking wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] The specific implementation is as figure 1As shown in the device process, the coking waste water with a tar concentration of 180mg / L, a volatile ammonia content of 3g / L (ammonium bicarbonate, free ammonia), and a COD (chemical oxygen demand) of 8000 mg / L is sent to the dust removal equipment. Ash pretreatment adsorbent adsorption tower, the coking wastewater after adsorption enters the deammonization adsorption tower, and the attached agent is molecular sieve adsorbent, and the adsorbent adopts hydrophobic ZSM-5 molecular sieve; the adsorbed wastewater is sent to the storage Pool; the tar content in the treated wastewater is 2.2 mg / L, the ammonia nitrogen content is 80 mg / L, and the COD content is 2000 mg / L.

[0038] After the pretreatment adsorbent is adsorbed and saturated, the dedusted dust is filtered and sent to the coal blending station for coal blending. After the adsorbent in the deamination adsorption tower is saturated, it is regenerated with nitrogen at 150°...

Embodiment 2

[0040] The specific implementation is as figure 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

[0042] 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.

[0043] 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 purification method of coking wastewater. The invention mainly aims at solving the technical problems of high ammonia content and high oil content of the coking wastewater affect the operation efficiency of a subsequent biochemical device and unstable effluent index. According to the purification method disclosed by the invention, the technical problems are solved by adopting the technical scheme of feeding the coking wastewater into an adsorption tower filled with an adsorbent which is a microcrystalline material adsorbent. The treatment method can be used in the industrial production for removing ammonia from the coking wastewater.

Description

technical field [0001] The invention belongs to the field of waste water treatment, in particular to a method for purifying coking waste water. Background technique [0002] Coking wastewater mainly comes from coking, gas purification and refining of chemical products. It is wastewater containing high concentrations of phenol, cyanide, oil, ammonia nitrogen and toxic and harmful organic substances. The main source is the residual ammonia water produced in the nitrogen distillation process. Coking wastewater is a recognized industrial wastewater that is difficult to biodegrade. The difficulty of its treatment lies in the high content of cyanide and phenols, the difficulty of biodegradation of polycyclic aromatic hydrocarbons and heterocyclic compounds, and poor biodegradability. High concentrations of ammonia nitrogen inhibit biological activity and lead to biodegradation. Nitrogen does not work well. At present, the treatment method of coking wastewater mainly adopts biolog...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/40C02F101/16
CPCC02F1/28C02F1/40C02F2101/16
Inventor 叶青保马广伟虞文胜周稳华
Owner 铜陵泰富特种材料有限公司
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