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Purifying method for coking residual ammonia water

A technology for coking residual ammonia water and ammonia water, which is applied in the direction of chemical instruments and methods, separation methods, water pollutants, etc., can solve problems such as activated carbon removal of ammonia and the effect of ammonia removal, high equipment requirements, and ozone leakage, etc., to achieve Simple and reliable regeneration operation, low equipment investment and short process

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

AI Technical Summary

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 report on the use of molecular sieves to adsorb tar in residual ammonia.

Method used

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  • Purifying method for coking residual ammonia water

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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 tar concentration is 180mg / L, the volatile ammonia content is 3g / L (ammonium bicarbonate, free ammonia), and the remaining ammonia water with a COD (chemical oxygen demand) of 8000 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 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 ...

Embodiment 2

[0040] The specific implementation is as figure 1 In the device process shown, the remaining ammonia water with a tar concentration of 200mg / L is sent to an adsorption tower filled with an adsorbent, wherein the adsorbent is a molecular sieve adsorbent, and the adsorbent adopts a 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 a tar concentration of 200 mg / L, a volatile ammonia content of 3 g / L, and a COD of 8000 mg / L. In the remaining ammonia water after treatment, the tar content is 3 mg / L, and the ammonia nitrogen content is 60 mg / L. The COD content is 1500 mg / L.

Embodiment 3

[0042] The specific implementation is as figure 1 In the device process shown, the remaining ammonia water with a tar concentration of 220mg / L is sent to the adsorption tower filled with adsorbents, wherein the adsorbent is a molecular sieve adsorbent, and the adsorbent adopts Ti-MOR molecular sieve; the remaining ammonia water 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 remaining ammonia water 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 remaining ammonia water 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 purifying method for coking residual ammonia water, which mainly solves the technical problem of influence on running and exhaust of subsequent ammonia evaporation equipmentand biochemical equipment of high content of ammonia in the residual ammonia water, high ammonia evaporation energy consumption and high content of oil in the residual ammonia water. The purifying method adopts the technical scheme with the following step of sending ammonia-containing residual ammonia water into an adsorption tower filled with an adsorbent, wherein the adsorbent is a microcrystalline adsorbent, so that the technical problem can be solved. The purifying 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 a method for removing residual ammonia in coking wastewater. 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 phenol, cyanide, oil, ammonia nitrogen and toxic and harmful organic substances. The main source is the oily residual ammonia water produced during the nitrogen distillation process. The tar substances in the remaining ammonia water enter the ammonia distillation tower along with the ammonia water, gradually accumulate in the tray, and eventually block the tray, causing the tray resistance to increase, and even flooding, which seriously affects the production efficiency and the stable operation of the ammonia distillation tower . When tar substances enter the biochemical treatment device, they can significantly inhibit b...

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 周稳华马广伟
Owner 铜陵泰富特种材料有限公司
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