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Zero-emission treatment system and process for volatile phenol in salt-containing wastewater

A technology of salt-containing wastewater and volatile phenol, applied in water/sewage treatment, heating water/sewage treatment, flotation water/sewage treatment, etc., can solve the problems of limiting size scale, limiting reactor size, reactor clogging, etc. Achieve the effect of reducing the cost of materials, less welding seams, and less clogging

Active Publication Date: 2020-08-07
克拉玛依九工环保技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For the treatment of high-organic, high-ammonia-nitrogen, and highly toxic waste salt-containing phenolic water, supercritical oxidation technology is mostly used in the prior art, but conventional supercritical treatment faces two bottlenecks that are difficult to solve. One is the precipitation of salt in the supercritical state. The clogging of the reactor, followed by the influence of the pressure and temperature of the reactor and strong oxidation corrosion, limits the size of the reactor, that is, limits the size and scale

Method used

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  • Zero-emission treatment system and process for volatile phenol in salt-containing wastewater
  • Zero-emission treatment system and process for volatile phenol in salt-containing wastewater
  • Zero-emission treatment system and process for volatile phenol in salt-containing wastewater

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Effect test

Embodiment 1

[0029] Embodiment 1: as figure 1 As shown, a zero-emission treatment system for volatile phenols in saline wastewater, including air flotation tank 1, multi-effect evaporator 2, No. 1 preheating heat exchanger 3, No. 2 preheating heat exchanger 4, supercritical Reactor, multi-stream heat exchanger 6, incineration torch 7, concentration equipment 8, flash tank 9, the supercritical reactor is provided with the upper feed port of the supercritical reactor and the lower feed port of the supercritical reactor, the supercritical The feed inlet of the lower part of the reactor is located in the middle and lower part of the side wall of the supercritical reactor, and the supercritical reactor is provided with two respectively No. 1 supercritical reactor 5-1 and No. 2 supercritical reactor 5-2, and an air flotation tank 1 The gas charged is inert gas, the gas outlet 1.1 of the air flotation tank is connected with the incineration torch 7, the water outlet 1.2 of the air flotation tank ...

Embodiment 2

[0030] Embodiment 2: as figure 2 As shown, a zero-emission treatment system for volatile phenols in saline wastewater, including air flotation tank 1, multi-effect evaporator 2, No. 1 preheating heat exchanger 3, No. 2 preheating heat exchanger 4, supercritical Reactor 5, multi-stream heat exchanger 6, incineration torch 7, concentration equipment 8, flash tank 9, supercritical reactor 5 is provided with supercritical reactor upper feed inlet and supercritical reactor lower feed inlet, The feed inlet of the lower part of the supercritical reactor is located at the middle and lower part of the side wall of the supercritical reactor 5, and the supercritical reactor 5 is provided with two respectively No. 1 supercritical reactor 5-1 and No. 2 supercritical reactor 5-2, The gas outlet 1.1 of the air flotation tank is connected with the incineration torch 7, the water outlet 1.2 of the air flotation tank is connected with the feed liquid inlet 2.1 of the multi-effect evaporator th...

Embodiment 3

[0031] Embodiment 3: as figure 1 As shown, a zero-emission treatment process for volatile phenol in saline wastewater includes the following steps: the salt-containing phenol wastewater is separated from oil, gas, and waste water through the air flotation tank 1, and the waste gas separated by the air flotation tank 1 is incinerated The torch 7 is incinerated, the waste water at the separation place of the air flotation tank 1 is evaporated by the multi-effect evaporator 2, the waste gas of the multi-effect evaporator 2 is incinerated by the torch 7, and the concentrated waste water after the multi-effect evaporation is heated by the No. 1 preheating heat exchanger 3 After entering the concentration equipment 8 to concentrate, the waste gas produced after concentration is sent to incineration torch 7 for incineration, the concentrated steam is discharged outside, and the concentrated liquid after concentration is heated by No. 2 preheating heat exchanger 4 and then passed throu...

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Abstract

The invention discloses a zero-emission treatment system for volatile phenol in salt-containing wastewater. A second material outlet of a first preheating heat exchanger is communicated with a feed port in the upper part of a first supercritical reactor; a first material outlet of a multi-flow heat exchanger is communicated with a feed port in the upper part of a second supercritical reactor through a second pipeline, and a medium outlet of the multi-flow heat exchanger is communicated with a feed port in the lower part of the first supercritical reactor and a feed port in the lower part of the second supercritical reactor. The invention also provides a zero-emission treatment process for volatile phenol in salt-containing wastewater. Pretreatment is carried out by using an air floatationtank, volatile phenol in the pretreated wastewater is partially removed, and quality-divided oxidation treatment is carried out on phenol-free wastewater and phenol-containing wastewater by using a multi-effect evaporator, so that the phenol-containing water is circularly oxidized in the system and is not discharged. A trace amount of strong brine is discharged from a strong brine end, so that thedischarge concentration is not higher than one ten thousandth or one hundred thousandth of inlet water.

Description

technical field [0001] The invention relates to the field of treatment of salty and phenolic wastewater, in particular to a zero-discharge treatment system and process for volatile phenol in saline wastewater. Background technique [0002] Chemical plants, pesticide plants, and printing and dyeing plants discharge high-organic, high-ammonia-nitrogen, highly toxic, salty, and phenolic wastewater that is difficult to treat. At present, it is usually diluted first before treatment. The processing cost is high and the processing is not thorough. Some toxic substances have only reached the discharge standard after dilution, but have not really been transformed into harmless substances, and the total amount of toxic substances has not changed. [0003] For the treatment of high-organic, high-ammonia-nitrogen, and highly toxic waste salt-containing phenolic water, supercritical oxidation technology is mostly used in the prior art, but conventional supercritical treatment faces two...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10F23G7/06C02F101/34
CPCC02F9/00F23G7/06C02F1/24C02F1/048C02F1/06C02F1/02C02F1/72C02F2101/345
Inventor 王力兴苏立辉顾法生王惠叶春
Owner 克拉玛依九工环保技术有限公司
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