Treating and recycling zero-emission technology and equipment for coking phenol-cyanogen wastewater

Abstract

The invention discloses a treating and recycling zero-emission technology for coking phenol-cyanogen wastewater. According to the treating and recycling zero-emission technology, a pre-sedimentation oil separating tank, an air floating system, an adjusting aeration tank, an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank, a coagulating reaction tank, a quick filtering tank, an ultrafiltration raw water tank, an ultrafiltration system, a nanofiltration system, a reverse osmosis system, a concentrated water aerobic tank, a concentrated water anoxic tank, an SBR tank, a chemical oxidation tank, a bitter water film concentrating system, a softening rigidity removing system, a low-pressure sea-water film system, a high-pressure sea-water film system, an MVR evaporating system, a sludge thickening tank, a press filter and a Roots blower are adopted for technological treatment. The invention further discloses treating and recycling zero-emission equipment for coking phenol-cyanogen wastewater. The treating and recycling zero-emission technology and equipment are high in treatment efficiency and low in cost, and have the advantages that zero emission of sewage can be realized.

Description

technical field

[0001] The invention relates to a zero-discharge process and equipment for the treatment and reuse of coking phenol cyanide wastewater. Background technique

[0002] Coking wastewater is high-concentration organic wastewater produced during coal coking, gas purification, and coking product processing. It contains a large amount of organic and inorganic pollutants such as phenols and cyanides. It is highly polluting and difficult to degrade. Existing treatment methods generally fall into three categories: physical-chemical methods, biochemical methods, and physical-chemical-biochemical methods, such as the processing methods disclosed in patents with publication numbers CN1721344 and CN100348519. Although the existing treatment processes can treat coking phenol-cyanide wastewater, there is room for optimization and improvement in terms of process flow, treatment cost, and treatment effect. Contents of the invention

[0003] The object of the present inventi...

Examples

Embodiment 1

[0028] Embodiment one: see figure 1 , a zero-discharge process for the treatment and reuse of coking phenol cyanide wastewater. The coking phenol cyanide wastewater enters the pre-sedimentation grease trap, and after removing part of the oil in the pre-settling grease trap, it is pumped into the air flotation system. After being treated by the air flotation system, the large Part of the oil and insoluble and part of soluble inorganic matter and organic matter are removed and enter the regulating aeration tank. After the water volume is adjusted and the water quality is homogenized, it enters the anaerobic tank. Most of the sludge is returned to the inlet end of the anaerobic tank to increase the concentration of anaerobic suspended sludge.

[0029] The effluent from the anaerobic tank enters the anoxic tank, and after being hydrolyzed by anaerobic and facultative bacteria to remove part of the phenol cyanide and a large part of ammonia nitrogen, the macromolecular insoluble or...

Embodiment 2

[0051] Embodiment 2: A zero-discharge equipment for the treatment and reuse of coking phenol cyanide wastewater, which has a pre-sedimentation grease trap, an air flotation system, an adjustable aeration tank, an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank, and a mixing tank. Coagulation reaction pool, rapid filtration pool, ultrafiltration raw water pool, ultrafiltration system, nanofiltration system, reverse osmosis system, concentrated water aerobic pool, concentrated water anoxic pool, SBR pool, chemical oxidation pool, brackish water membrane concentration system , Softening and hardness removal system, low-pressure seawater membrane system, high-pressure seawater membrane system, MVR evaporation system, sludge concentration tank, filter press, Roots blower.

[0052] Pre-sedimentation grease trap, air flotation system, regulating aeration tank, anaerobic tank, anoxic tank, aerobic tank, secondary settling tank, coagulation reaction tank,...

technical field

[0001] The invention relates to a zero-discharge process and equipment for the treatment and reuse of coking phenol cyanide wastewater. Background technique

[0002] Coking wastewater is high-concentration organic wastewater produced during coal coking, gas purification, and coking product processing. It contains a large amount of organic and inorganic pollutants such as phenols and cyanides. It is highly polluting and difficult to degrade. Existing treatment methods generally fall into three categories: physical-chemical methods, biochemical methods, and physical-chemical-biochemical methods, such as the processing methods disclosed in patents with publication numbers CN1721344 and CN100348519. Although the existing treatment processes can treat coking phenol-cyanide wastewater, there is room for optimization and improvement in terms of process flow, treatment cost, and treatment effect. Contents of the invention

[0003] The object of the present inventi...

Examples

Embodiment 1

[0028] Embodiment one: see figure 1 , a zero-discharge process for the treatment and reuse of coking phenol cyanide wastewater. The coking phenol cyanide wastewater enters the pre-sedimentation grease trap, and after removing part of the oil in the pre-settling grease trap, it is pumped into the air flotation system. After being treated by the air flotation system, the large Part of the oil and insoluble and part of soluble inorganic matter and organic matter are removed and enter the regulating aeration tank. After the water volume is adjusted and the water quality is homogenized, it enters the anaerobic tank. Most of the sludge is returned to the inlet end of the anaerobic tank to increase the concentration of anaerobic suspended sludge.

[0029] The effluent from the anaerobic tank enters the anoxic tank, and after being hydrolyzed by anaerobic and facultative bacteria to remove part of the phenol cyanide and a large part of ammonia nitrogen, the macromolecular insoluble or...

Embodiment 2

[0051] Embodiment 2: A zero-discharge equipment for the treatment and reuse of coking phenol cyanide wastewater, which has a pre-sedimentation grease trap, an air flotation system, an adjustable aeration tank, an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank, and a mixing tank. Coagulation reaction pool, rapid filtration pool, ultrafiltration raw water pool, ultrafiltration system, nanofiltration system, reverse osmosis system, concentrated water aerobic pool, concentrated water anoxic pool, SBR pool, chemical oxidation pool, brackish water membrane concentration system , Softening and hardness removal system, low-pressure seawater membrane system, high-pressure seawater membrane system, MVR evaporation system, sludge concentration tank, filter press, Roots blower.

[0052] Pre-sedimentation grease trap, air flotation system, regulating aeration tank, anaerobic tank, anoxic tank, aerobic tank, secondary settling tank, coagulation reaction tank,...

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