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Recycle method of recycled water

A technology for reclaimed water and reclaimed water, applied in the field of water treatment, can solve the problems of high cost, large investment and technical difficulty, and achieve the effect of low cost, high reclaimed water reuse rate and lower production cost.

Inactive Publication Date: 2011-08-31
KAILUAN GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The water quality of this part of the sewage is very poor, containing more colloids, suspended solids, bacteria and a certain amount of iron ions, higher turbidity, COD, and higher hardness and alkalinity, due to large investment, high cost and technical difficulty Large, has always been a technical problem in the field of domestic circulating water treatment

Method used

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Examples

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Embodiment 1

[0028] Example 1: The effluent (110t / h) of coking wastewater after biochemical and advanced treatment is mixed with circulating water sewage, reverse osmosis concentrated water from desalination station, boiler sewage and other reclaimed water in the adjustment tank of lime + flocculation sedimentation process 1 A mixture is formed. After the mixed solution (300t / h) is subjected to lime + flocculation sedimentation and multi-media filter, the effluent COD≤10mg / L, total hardness≤35mg / L, total alkalinity≤85mg / L, chloride ion≤100mg / L; About 200t / h of media filter water is directly used as reuse water, and the remaining water of about 100t / h is treated by activated carbon filter, softener, ultrafiltration filter and secondary reverse osmosis equipment. The effluent of the secondary reverse osmosis equipment and the water discharged from the multi-media filter are directly used as reuse water; the concentrated water of the secondary reverse osmosis equipment is treated by the conce...

Embodiment 2

[0029] Example 2: The effluent (110t / h) of coking wastewater after biochemical and advanced treatment is mixed with recycled water sewage, reverse osmosis concentrated water from desalination station, boiler sewage and other reclaimed water in the adjustment tank of lime + flocculation sedimentation process 1 . After the mixed solution (300t / h) passes through lime + flocculation sedimentation and multi-media filter, about 200t / h of water is directly discharged to the circulating water system, and the remaining about 100t / h of water passes through activated carbon filter and softener , ultrafiltration filter, precision filter and secondary reverse osmosis equipment treatment. The reverse osmosis effluent and the water discharged from the multi-media filter are directly sent to the circulating water system; the reverse osmosis concentrated water is used to flush the coal preparation belt or quench coke.

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Abstract

The invention discloses a recycle method of recycled water, which comprises the steps of: mixing cooked wastewater with the recycled water by the biochemically-treated and deeply-treated discharged water; and treating the mixed water through a lime+flocculation precipitating working procedure, a multi-medium filtering working procedure, a filtering working procedure by active carbon, a softening working procedure by a softener, an ultra-filtering working procedure and a reverse osmosis working procedure to obtain recycling water, wherein the recycling water is used as compensating water of circulating water, greening water, boiler water or fire fighting water. The recycle method of the recycled water can be used for wholly recycling the cooker wastewater; and the recycle method of the recycled water is used for mixing the cooked wastewater with the recycled water such as the circulating water wastewater, deoxidization station reverse osmosis concentrated water, the boiler wastewater and the like through the biochemically-treated and the deeply-treated discharged water and then treating the mixing water together, so that the quality of the recycled water is improved, the treatment difficulty is reduced, and the recycled water is high in yield and low in cost.

Description

technical field [0001] The present invention relates to a water treatment method, in particular to a process in which the effluent of coking wastewater after biochemical and advanced treatment is mixed with reclaimed water such as circulating water sewage, reverse osmosis concentrated water from a desalination station, and boiler sewage. Water reuse methods. Background technique [0002] The coking wastewater produced in the production process of coal chemical enterprises is complex in composition and belongs to toxic and harmful organic wastewater. After biochemical treatment, there are still certain harmful substances that are difficult to degrade. Moreover, the water contains a large amount of chloride ions. Only by further removing these substances, It can be used as supplementary water for circulating water. Coal chemical production also requires a large amount of circulating cooling water. In order to ensure the quality of circulating cooling water, it is necessary to...

Claims

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Application Information

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IPC IPC(8): C02F9/14C10L9/10C02F1/52C02F1/44
Inventor 房承宣徐贺明王亚涛王庆非李建华李国忠甄旭东
Owner KAILUAN GRP
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