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Coking wastewater advanced treatment system and treatment method thereof

A technology for advanced treatment and coking wastewater, applied in natural water treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve the problems of poor system operation stability, large-scale evaporation system, and low utilization rate of resources. Achieve the effects of reducing the amount of evaporated water, ensuring safe and stable operation, and reducing investment and operating costs

Pending Publication Date: 2021-11-02
内蒙古晶泰环境科技有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In order to solve the problems existing in the current coking wastewater treatment process, such as low resource utilization rate, large-scale follow-up evaporation system, high treatment cost, poor system operation stability, etc., the first purpose of the present invention is to provide a kind of equipment investment cost and water treatment cost Coking wastewater advanced treatment system with low cost, high resource utilization rate and stable system operation

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  • Coking wastewater advanced treatment system and treatment method thereof

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Effect test

Embodiment 1

[0041] Embodiment 1: as figure 1 As shown, a coking wastewater advanced treatment system includes a first high-salt wastewater delivery pipe, a first pretreatment system, a second high-salt wastewater delivery pipe, a mixing tank, a second pretreatment system, a three-stage salt separation system and Evaporation and crystallization system; the outlet end of the first high-salt wastewater delivery pipe communicates with the water inlet of the regulating tank of the first pretreatment system; the outlet of the first reverse osmosis unit of the first pretreatment system and the second high-salt wastewater delivery pipe The water outlets of the mixing tank are all connected to the water inlet of the mixing tank; the water outlet of the mixing tank is connected to the water inlet of the second high-efficiency sedimentation unit of the second pretreatment unit; the water outlet of the decarbonization unit of the second pretreatment unit is connected to the third fraction The water i...

Embodiment 2

[0048] Embodiment 2: utilize the method for processing coking waste water of embodiment 1 system, it comprises the following steps:

[0049] (1) Primary pretreatment: TDS 3700mg / L, COD 35mg / L, total hardness 650mg / L, sulfate radical 1000mg / L, chloride ion 1000mg / L, alkalinity 400mg / L, fluoride ion 10mg / L, total silicon The 12mg / L salty wastewater is sent to the first pretreatment system through the first high-salt wastewater delivery pipe, and then passes through the first high-efficiency precipitation unit to remove hard and alkali, and the first sand filter unit and the first ultrafiltration unit to remove SS in the water and colloid, and finally concentrated by the first reverse osmosis unit to obtain concentrated water with a TDS of 16000mg / L. Add sodium hydroxide and sodium carbonate to adjust the pH value of the wastewater in the first high-efficiency precipitation unit to between 11 and 11.5; the total hardness of the effluent from the first high-efficiency precipitatio...

Embodiment 3

[0061] Embodiment 3: utilize the method for processing coking waste water of embodiment 1 system, it comprises the following steps:

[0062] (1) Primary pretreatment: TDS 3000mg / L, COD 30mg / L, total hardness 500mg / L, sulfate radical 500mg / L, chloride ion 500mg / L, alkalinity 350mg / L, fluoride ion 8mg / L, total silicon The 10mg / L salty wastewater is sent to the first pretreatment system through the first high-salt wastewater delivery pipe, and then passes through the first high-efficiency precipitation unit to remove hard and alkali, and the first sand filter unit and the first ultrafiltration unit to remove SS in the water and colloid, and finally concentrated by the first reverse osmosis unit to obtain concentrated water with a TDS of 10,000mg / L, and the produced water is sent to the reuse water tank for reuse, realizing 70% of the water is reused; to the first high-efficiency precipitation unit Add sodium hydroxide and sodium carbonate to adjust the pH value of the wastewater ...

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Abstract

The invention discloses a coking wastewater advanced treatment system and a treatment method thereof. The system comprises a first high-salinity wastewater conveying pipe, a first pretreatment system, a second high-salinity wastewater conveying pipe, a mixing pool, a second pretreatment system, a three-stage salt separation system and an evaporative crystallization system, the method comprises the following steps: (1) primary pretreatment; (2) secondary pretreatment; (3) third-stage salt separation; and (4) evaporative crystallization. According to the invention, stage treatment of high-concentration coking wastewater and low-concentration coking wastewater is realized, the water treatment pressure of a subsequent system is reduced, and safe and stable operation of the subsequent system can be ensured; the evaporation water quantity is greatly reduced, the energy consumption of evaporation and crystallization is effectively reduced, and the investment and operation cost of an evaporation and crystallization system is greatly reduced; the wastewater is subjected to salt separation by adopting a three-stage salt separation method, so that the yield of carnallite is greatly reduced, high-quality sodium sulfate crystal salt and sodium chloride crystal salt can be obtained, and the resource utilization rate is greatly improved.

Description

Technical field: [0001] The patent of the invention belongs to the field of wastewater treatment, and specifically relates to a coking wastewater advanced treatment system and a treatment method thereof. Background technique: [0002] Coking wastewater is industrial organic wastewater produced during high-temperature dry distillation of coal to obtain coke and gas purification, by-product recovery and refining; it mainly includes tar refining separation water, refined benzene separation water, coke quenching wastewater, gas purification water, gas cooling water, etc. Coking wastewater contains a large number of toxic components, which are difficult to degrade and have poor biodegradability; and the soluble organic matter in coking wastewater mainly includes high concentrations of phenols, cyanides, polycyclic aromatic hydrocarbons, heterocyclic compounds, ammonia nitrogen, etc. [0003] The combination of pretreatment, biological treatment and advanced treatment is the cokin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/10C02F101/10C02F101/14C02F103/36
CPCC02F9/00C02F1/001C02F2001/007C02F1/441C02F1/444C02F1/442C02F1/04C02F1/66C02F1/52C02F2101/14C02F2101/10C02F1/78C02F1/38C02F2103/365
Inventor 乔宇张帅张水水田力贺名威肖龙博
Owner 内蒙古晶泰环境科技有限责任公司
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