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A system and method for resourceful treatment of high-salt organic wastewater

A technology for organic wastewater and recycling, which is applied in water/sewage treatment, chemical instruments and methods, water/sewage multi-stage treatment, etc. The effect of reducing heat energy, efficient separation, and improving the utilization rate of heat energy

Active Publication Date: 2022-01-28
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem that the existing technology cannot realize the high-efficiency treatment of high-salt organic wastewater and the recycling of waste salt, the present invention provides a system and method for resource-processing of high-salt organic wastewater, which can realize high-salt Complete removal of organic matter in wastewater; at the same time, this method can recover high-purity sodium sulfate and hydrochloric acid, and realize the harmless and resourceful disposal of high-salt organic wastewater

Method used

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  • A system and method for resourceful treatment of high-salt organic wastewater
  • A system and method for resourceful treatment of high-salt organic wastewater
  • A system and method for resourceful treatment of high-salt organic wastewater

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Embodiment 1

[0071] This embodiment provides a system for the resourceful treatment of high-salt organic wastewater. The schematic diagram of the system for the resourceful treatment of high-salt organic wastewater is as follows figure 2 As shown, it includes a raw water concentration unit 1, an atomization pyrolysis unit 2 and a sodium sulfate purification unit 3 connected sequentially through pipelines; the gas outlet of the atomization pyrolysis unit is sequentially connected to the hydrochloric acid recovery unit 4 and tail gas treatment through pipelines Unit 5;

[0072] The raw water concentration unit 1 is used to concentrate and treat high-salt organic wastewater; the raw water concentration unit 1 includes a raw water tank, a concentration device and a concentrated water tank connected in sequence through pipelines; the concentration device includes a pressure-driven membrane concentration device, Any one or a combination of at least two of electrically driven membrane concentrat...

Embodiment 2

[0078] This embodiment provides a system for the resourceful treatment of high-salt organic wastewater. Compared with Example 1, the schematic structural diagram of the atomization pyrolysis tower in the system for the resourceful treatment of high-salt organic wastewater is as follows Figure 4 As shown, except that the concentrated liquid sprayed by the atomizing device 22 is in contact with the hot air provided by the burner 23, the rest is the same as that of Embodiment 1.

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Abstract

A system and method for resourceful treatment of high-salt organic wastewater, the system includes five units of raw water concentration, atomization pyrolysis, sodium sulfate purification, hydrochloric acid recovery and tail gas treatment. The raw water concentration unit concentrates the high-salt organic wastewater; the atomization pyrolysis unit adds an acidifying agent to the concentrated solution for acidification, and at the same time adds an oxidant, then atomizes and pyrolyzes the organic matter in the water to completely oxidize and remove, and separates to obtain hydrogen chloride gas and sodium sulfate. Mixed salt; the sodium sulfate purification unit dissolves, removes impurities, evaporates and crystallizes the separated sodium sulfate mixed salt, and the sodium sulfate is purified through recrystallization; the hydrochloric acid recovery unit filters and condenses the separated hydrogen chloride gas to recover hydrochloric acid; tail gas The processing unit deacidifies and purifies the remaining tail gas of the hydrochloric acid recovery unit. The system and method can realize high-efficiency removal of organic matter in high-salt wastewater, and recover hydrochloric acid and sodium sulfate crystalline salt at the same time; realize resourceful treatment of high-salt organic wastewater, and have good application prospects.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and relates to a treatment system and method for organic wastewater, in particular to a system and method for resource-based treatment of high-salt organic wastewater. Background technique [0002] Iron and steel, coal chemical, petrochemical, coal power, nonferrous metallurgy, fine chemical, pharmaceutical and other heavy polluting enterprises not only consume a lot of water resources, but also have a high intensity of sewage discharge. In order to cope with the dual pressures from water resources and the environment, many enterprises have adopted membrane concentration technology to carry out zero-discharge transformation of wastewater treatment systems. High salt content, also contains refractory organic matter. In order to reduce the amount of high-concentration brine, some enterprises crystallize the salt in the wastewater by simply evaporating to dryness. The main c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C01B7/07C01D5/16C02F101/30
CPCC02F9/00C01B7/0706C01D5/16C02F1/12C02F1/66C02F1/72C02F1/78C02F1/44C02F1/727C02F1/722C02F2101/30
Inventor 曹宏斌李玉平高明
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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