Purifying method for coking ammonia distilling wastewater

A technology for ammonia distillation wastewater and coking, which is applied to chemical instruments and methods, separation methods, water pollutants, etc., can solve the problems of undisclosed adsorption of tar in ammonia distillation wastewater, high equipment requirements, ozone leakage, etc., and achieves simple regeneration operation. Reliable, low equipment investment, short process effect

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 effect of activated carbon degreasing and 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 public report on the use of molecular sieves to adsorb tar in ammonia distillation wastewater.

Method used

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  • Purifying method for coking ammonia distilling 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 flow, the residual ammonia water with a tar concentration of 60mg / L, a fixed ammonia content of 3g / L (ammonium sulfate, ammonium chloride), and a COD (chemical oxygen demand) of 3000 mg / L is fed into the dust removal equipment. Ash pretreatment adsorbent adsorption tower, the remaining ammonia water after adsorption enters the deammonization adsorption tower, wherein the attached agent is molecular sieve adsorbent, and the adsorbent adopts hydrophobic ZSM-5 molecular sieve; the adsorbed waste water is sent to the storage Pool; the tar content in the treated wastewater is 1.2mg / L, the ammonia nitrogen content is 40mg / L, and the COD content is 300mg / 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 a...

Embodiment 2

[0040] The specific implementation is as figure 1 In the device process shown, the remaining ammonia water with a tar concentration of 68mg / L is sent to the adsorption tower filled with adsorbents, wherein the adsorbent is a molecular sieve adsorbent, and the adsorbent adopts TS-1 molecular sieve; the remaining ammonia water 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 remaining ammonia water before treatment contains 680 mg / L of tar, 300 mg / L of fixed ammonia, and 3200 mg / L of COD. After treatment, the tar content is 1.3 mg / L and the ammonia nitrogen content is 4 mg / L. , COD content is 325 mg / L.

Embodiment 3

[0042] The specific implementation is as figure 1 As shown in the device process, the ammonia distillation wastewater containing tar concentration of 50mg / L is sent to the adsorption tower filled with adsorbent, wherein the adsorbent is a molecular sieve adsorbent, and the adsorbent adopts Ti-MOR molecular sieve; the ammonia distillation after adsorption The waste water 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.

[0043] The ammonia distillation wastewater before treatment contains a tar concentration of 50mg / L, a fixed ammonia content of 280mg / L, and a COD of 3200 mg / L. In the treated ammonia distillation wastewater, the tar content is 0.8 mg / L, and the ammonia nitrogen content is 4mg / L. L, COD content is 328 mg / L.

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Abstract

The invention relates to a purifying method for coking ammonia distilling wastewater, which mainly solves the technical problem of influence on running and exhaust of subsequent biochemical device ofhigh content of ammonia and high content of oil in the ammonia distilling wastewater. The purifying method adopts the technical scheme with the following steps of pretreating the ammonia distilling wastewater of a coking factory by an adsorbent A, removing one part of tar in the residual ammonia water, sending the ammonia distilling wastewater after tar removal into an adsorption tower filled witha microcrystalline adsorbent B, adsorbing the ammonia and oil in the residual ammonia water, sending the wastewater after adsorbing into a wastewater biochemical tank, regenerating the adsorbent B after adsorption saturation by nitrogen gas or steam with temperature of 50 to 400 DEG C, and continuing to use, so that the technical problems can be well solved. The method is suitable for the industrialized production of ammonia removal of coking wastewater.

Description

technical field [0001] The invention belongs to the field of coking wastewater treatment, in particular to an ammonia removal method for ammonia distillation wastewater in coking wastewater. 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, of which residual ammonia water is the main source. The ammonia distillation wastewater after the remaining ammonia water passes through ammonia distillation still contains tar, fixed ammonium salts, and phenol cyanides in a considerable concentration. When tar, phenol cyanide, and ammonia nitrogen substances enter the biochemical treatment device, they can significantly inhibit biological activity, increase the load of the biochemical treatment device, and affect the final sewage treatment effect. The current difficulty in the treat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28C02F1/40C02F101/16
CPCC02F1/28C02F1/40C02F2101/16C02F2303/16
Inventor 虞文胜周稳华马广伟李腾姣
Owner 铜陵泰富特种材料有限公司
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