A method and system for treating high-salt and high-nitrification industrial wastewater

A technology for waste water treatment and nitrate industry, which is applied in water/sewage treatment, multi-stage water/sewage treatment, oxidized water/sewage treatment, etc. It can solve the problems of low applicability, poor treatment effect, and difficult treatment.

Active Publication Date: 2022-04-01
BEIJING FUMEIJIA ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main advantages of this scheme are the simple structure of the electrolytic cell, zero salt consumption, and simple process, but the main disadvantages are that the high electrolysis voltage leads to high electrolysis energy consumption, low nitrogen removal efficiency, and serious interaction between cathode and anode reactions.
The comprehensive treatment cost is high, the treatment is difficult, the treatment speed is slow, and the treatment effect is poor, and the applicability of the second scheme to the treatment of high-salt and high-nitrate industrial wastewater is lower than that of the first scheme

Method used

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  • A method and system for treating high-salt and high-nitrification industrial wastewater
  • A method and system for treating high-salt and high-nitrification industrial wastewater
  • A method and system for treating high-salt and high-nitrification industrial wastewater

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Embodiment 1

[0089] This embodiment provides a constant flow continuous flow system with a structure such as Figure 4 As shown, it mainly includes neutralization sedimentation tank 12, filter 6, water storage tank 17, cathode water inlet pump 18, electrochemical reactor 14, DC power supply 21, cathode gas-liquid separation tank 11, chlorine absorption pipe 19, anode tail gas separation Tank 20, anode gas-liquid separation tank 25, anode start-up water pump 77 and related pipelines, valves and feeding ports. Among them, there are two neutralization sedimentation tanks 12, filters 6 and water storage tanks 17, and two sets of neutralization and desalination systems are composed of each of the neutralization sedimentation tanks and filters, and the two water storage tanks are two sets of systems Shared, two sets of neutralization and desalination systems are used at the same time or alternately, and the two water storage tanks alternately discharge water to ensure constant flow of water. F...

Embodiment 2

[0096] This embodiment provides an equal-volume batch processing system, such as image 3As shown, it mainly includes pre-treatment system, electrochemical treatment system, chlorine gas absorption system and related valves, pipelines and feeding devices. The pre-treatment system can be selected according to water quality or other considerations, and can be reserved and unnecessary This is achieved through valve control. The pretreatment system mainly includes a neutralization sedimentation tank 12 , a filter 6 and a water storage tank 17 . The electrochemical treatment system mainly includes a DC power supply 21 , an electrochemical reactor 14 , a cathode circulation tank 31 , a cathode circulation pump 34 , an anode circulation pump 38 and an anode circulation tank 30 . The chlorine absorption system is mainly the chlorine absorption tank 28. The feeding device includes two pretreatment feeding ports 1 and 16 and an anode salt replenishing port 55 .

[0097] The cathode c...

Embodiment 3

[0103] This embodiment provides a method for treating high-salt and high-nitrate industrial wastewater. The raw water samples are either one type A or two types B. The operation scheme is: constant flow continuous flow ( Figure 4 Said system), start-up phase anode water sample batching scheme: all 8 kinds.

[0104] Adopt the constant flow continuous flow system described in embodiment 1 ( Figure 4 ) implement the processing method, specifically:

[0105] During pretreatment, for Type A raw water, valves 3, 59, 10 and 8 are closed, and valves 4 and 9 are opened; for Type B raw water, valves 3, 59 and 9 are closed, and valves 4, 8 and 10 are opened .

[0106] In the start-up phase, the raw water is pretreated according to the respective initial feeding parameters in Table 2 for the two types and three types of water samples. The acid or alkali supplementation is completed through the feeding port 16, and then the pretreated effluent is filled with the cathode chamber 15 and ...

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Abstract

The invention relates to a treatment method and system for high-salt and high-nitrification industrial wastewater. The treatment method includes the steps of pre-treatment neutralization and desalination, electroreduction for denitrification, chlorine absorption for ammonia nitrogen and electrooxidation for chlorine production, so that the treated water samples can be The treatment procedures of each step are sequentially flowed and coupled with each other, and two sets of treatment systems are proposed to solve the treatment of high-salt and high-nitrification industrial wastewater with the help of three characteristic cycles—sodium cycle, chlorine cycle and alkali cycle; and a series of judgments are put forward. According to the parameters, standards, methods and three control equations, quantitatively guide the on-demand addition, preparation and precise dosing of relevant agents from the aspect of parameter control, so as to realize the effective treatment of water samples in each step and the treatment procedures in each step. The sequence coordination and stable flow between them not only ensure the completion of the denitrification task, but also make full use of and absorb the excess alkali production capacity in the conversion process, avoid excessive use and waste of chemicals, and at the same time ensure the final effluent hypochlorite Maximum limit for chemical content.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method and system for treating high-salt and high-nitrate industrial wastewater. Background technique [0002] At present, the discharge of nitrate-containing wastewater has become one of the important sources of water environmental pollution, especially high-salt and high-nitrification industrial wastewater. Due to the characteristics of large volume, high concentration and complex water quality, its large-scale and concentrated discharge will cause environmental water quality. severe shock. However, so far, no economical and effective treatment method for this type of wastewater has been found, resulting in more and more serious nitrate water pollution. In areas where discharge standards are tightened and discharge control is strengthened, relevant enterprises are faced with production restrictions and shutdowns threat, which in turn affects the local economic d...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C02F9/06C02F101/16
CPCC02F9/00C02F2101/163C02F1/4676C02F1/76C02F1/4672
Inventor康鹏张红飞章乐
OwnerBEIJING FUMEIJIA ENERGY TECH CO LTD