Method and system for treating high-salt and high-nitrate industrial wastewater

A technology for wastewater treatment and nitrification industry, applied in water/sewage treatment, multi-stage water/sewage treatment, oxidized water/sewage treatment, etc. Avoid overdose and wasted effects

Active Publication Date: 2020-02-18
BEIJING FUMEIJIA ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Method and system for treating high-salt and high-nitrate industrial wastewater
  • Method and system for treating high-salt and high-nitrate industrial wastewater
  • Method and system for treating high-salt and high-nitrate 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 method and a system for treating high-salt and high-nitrate industrial wastewater. The treatment method comprises the steps of pretreatment neutralization desalting, electroreduction nitrate nitrogen removal, chlorine absorption for removing ammonia, and electrooxidation for producing chlorine, so sequential flow and mutual coupling of a treatment water sample among alltreatment processes are achieved. Two sets of treatment systems for solving the problem of high-salt and high-nitrate industrial wastewater treatment by means of three characteristic cycles, namely sodium cycle, chlorine cycle and alkali cycle, are provided; a series of criterion parameters, standards, methods and three control equations are provided, on-demand addition, preparation and accurate feeding of related medicaments are quantitatively guided from the aspect of parameter control to achieve the effective treatment of the treatment water sample in each step and the sequential coordination and stable circulation among the treatment processes in each step, so the completion of the denitration task is guaranteed, the excessive alkali production capacity in the conversion process can befully utilized and absorbed, excessive use and waste of the medicaments can be avoided, and the maximum limit on the content of hypochlorides in final effluent can be achieved.

Description

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

Claims

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Application Information

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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