Blast furnace gas washing circulating water system
A circulating water system, blast furnace gas technology, applied in the direction of gaseous effluent wastewater treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problems that zinc-containing wastewater is difficult to work
Inactive Publication Date: 2014-01-15
SHAANXI SHENGMAI PETROLEUM
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Problems solved by technology
Because this type of wastewater contains many factors such as cyanide, chlorine, and sulfur that interfere with zinc precipitation, traditional chemical precipitation treatment methods are often difficult to be effective for zinc-containing wastewater, so there is no successful treatment of this type of wastewater in China to achieve better removal. Examples of Effects or Compliance Emissions
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Embodiment 1
[0009] The blast furnace gas scrubbing circulating water system includes an advection pool, a lifting pump room, an inclined plate pool, an artesian ditch, a primary water absorption well, a secondary water absorption well and a pump room connected in sequence. There is also a gap between the inclined plate pool and the sewage treatment plant It is connected to the sodium hypochlorite oxidation and hydroxide sedimentation tank and the sewage mixing tank. In addition, the inclined plate tank is also connected to the sludge treatment system. The primary water absorption well is also connected to the cooling tower, and the other end of the cooling tower is connected to the secondary water absorption well.
[0010] Among them, the mass depth of available chlorine in the sodium hypochlorite oxidation and hydroxide sedimentation tank is 250mg / L, the pH is 9-10, the temperature is 25°C, and the stirring reaction time of sewage in the sodium hypochlorite oxidation and hydroxide sediment...
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The invention discloses a blast furnace gas washing circulating water system, and relates to a sewage treatment device. The blast furnace gas washing circulating water system comprises a parallel flow pool, a boosting pump room, an inclined plate pool, a self-flowing ditch, a primary suction well, a secondary suction well and a pump room which are sequentially connected, wherein a sodium hypochlorite oxidizing and hydroxide precipitating tank and a sewage mixing pool are further connected between the inclined plate pool and a sewage treatment plant. After practical application on a production site for some time, through detection, the average mass concentration of total cyanides in a water sample at a discharge port outside the sewage mixing pool is decreased to 4.42 mg / L and the average mass concentration of zinc ions is 14.7l mg / L, thus meeting standard requirements of industrial circulating water.
Description
technical field [0001] The invention relates to a sewage treatment device. Background technique [0002] Blast furnace gas washing is to wash the gas from the top of the ironmaking blast furnace after being dedusted by the dry gravity dust collector through water washing to make it into clean gas, and then send it to the metallurgical plant for use as fuel. Due to the direct contact between the washing water and the gas, fine solid impurities (also known as gas mud), minerals and harmful substances in the gas also enter the water, resulting in water pollution. The treatment process of domestic blast furnace gas washing water includes precipitation, cooling, water circulation scale and corrosion inhibition treatment, sludge dehydration and utilization and other main processes. Among them, the sedimentation method mainly removes the suspended solids in the water, but it is not enough for the blast furnace gas washing wastewater discharged from the circulation treatment sy...
Claims
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IPC IPC(8): C02F9/04C02F103/18
Inventor 王耀斌
Owner SHAANXI SHENGMAI PETROLEUM