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Pretreatment process method and device for removing aniline in wastewater through potassium ferrate

A technology of potassium ferrate and process method, which is applied in water/sewage multi-stage treatment, oxidized water/sewage treatment, water/sludge/sewage treatment and other directions, can solve problems such as shortening, solve secondary pollution, improve biochemical The effect of processing efficiency

Inactive Publication Date: 2009-11-04
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a pretreatment process and equipment for potassium ferrate to remove aniline in wastewater. The method utilizes the strong oxidizing property of potassium ferrate to oxidize refractory aniline into a series of aliphatic hydrocarbons, In this way, the biochemical treatment efficiency of the follow-up process is improved, and the secondary pollution problem common in other processes is solved, and grid-like shelves are added in the coagulation area to shorten the reaction time and improve the reaction efficiency; in the coagulation area and the precipitation area Increase the transition zone between them, and add grid-shaped partitions to improve the sedimentation effect

Method used

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  • Pretreatment process method and device for removing aniline in wastewater through potassium ferrate
  • Pretreatment process method and device for removing aniline in wastewater through potassium ferrate
  • Pretreatment process method and device for removing aniline in wastewater through potassium ferrate

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Embodiment 1

[0034] The aniline-containing wastewater to be treated is sucked by the lift pump 2 through the water inlet pipe 1 and injected into the tubular mixer 7, in the tubular mixer 7 and the high-speed rail injected into the tubular mixer by the metering pump 5 through the feed pipe 4 Potassium is mixed thoroughly. Flow through the connecting pipe 8, enter the coagulation reaction zone 13, pass through the grid-shaped shelf 10, shelf 11, and shelf 12 from top to bottom, and then enter the coagulation reaction zone 14, and pass through the grid-shaped shelf from bottom to top. Shelf plate 12, shelf plate 11, shelf plate 10, and then enter coagulation reaction zone 15, respectively pass through grid-shaped shelf plate 10, shelf plate 11, shelf plate 12 from top to bottom, and then enter coagulation reaction zone 16, by Go through the grid-shaped shelf 12, shelf 11, and shelf 10 from bottom to top, then enter the coagulation reaction zone 17, pass through the grid-shaped shelf 10, shel...

Embodiment 2

[0036] In order to degrade aniline effectively, the waste water with aniline concentration of 62mg / L was artificially prepared, and a set of production equipment was established by using the new technology proposed by the present invention, and the treated water volume was 0.3m 3 / h.

[0037] The rising flow rate in the tube mixer is 0.8-1.0m / s, its height is 1000mm, its inner diameter is 10mm, its outer diameter is 15mm, and an orifice plate is set every 25mm.

[0038]The length and width of the lower bottom of the integrated coagulation and sedimentation device are 1400mm*400mm, the length and width of the upper bottom are 1200mm*400mm, the height is 1200mm, and the length, width and height of the drainage tank are 200*400*200. Among them, the size of the coagulation zone is 600mm*400mm*1200, the height of the bottom of the sedimentation zone is 400mm, the height of the inclined plate sedimentation zone is 400mm, and the height of the clear water zone of the sedimentation ta...

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Abstract

The invention relates to a pretreatment process method and a device for removing aniline in wastewater through potassium ferrate. The method comprises the following steps: intensively mixing the wastewater to be treated and potassium ferrate in a tubular mixer, and setting the rate of flowing water in the tube to 0.8 to 1.0m / s; leading the intensively mixed wastewater into a tableflap type coagulating basin for 30min of reaction; and leading the reacted wastewater into a precipitation pool for precipitation, setting upward flowing rate in the precipitation pool to 10 to 15 mm / s, and leading the output water into a conventional biochemical system after precipitation. The method makes use of the strong oxidizing property of potassium ferrate to oxidize hardly degradable aniline into a series of aliphatic hydrocarbons, thereby improving the biochemical treatment efficiency of a subsequence process, and solving the problem of secondary pollution universally lying in other processes. In addition, a grid-shape holder plate is arranged in a coagulation area so as to shorten the reaction time and improve the reaction efficiency. A transition area is arranged between the coagulation area and the precipitation area and a grid-shaped baffle plate is also added to improve the precipitation effect.

Description

technical field [0001] The invention belongs to the field of pretreatment process and equipment for removing aniline in wastewater, and in particular relates to a pretreatment process method and equipment for removing aniline in wastewater with potassium ferrate. Background technique [0002] Aniline is an important raw material commonly used in dye manufacturing, printing and dyeing, rubber, pharmaceuticals, plastics and paints. It is a highly toxic chemical and is listed as a priority environmental pollutant for control. The discharge of industrial wastewater must be strictly controlled. GB3838-2002 stipulates that the upper limit of aniline discharge from surface water sources is 0.1mg / L. At present, the methods for treating aniline wastewater mainly include adsorption method, biological method, and advanced oxidation method (photocatalytic oxidation, electrochemical oxidation, supercritical oxidation). [0003] The adsorption method mainly uses the adsorption of activa...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F1/72C02F1/52C02F101/38
Inventor 薛罡刘亚男龚清杰高品杨林
Owner DONGHUA UNIV
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