Softening device for treating high-hardness, low-alkalinity salt-containing wastewater

A technology of salt-containing wastewater and softening device, applied in the field of water treatment, can solve the problems of large consumption of chemicals, difficulty in controlling the dosage of chemicals, easy dust pollution in the surrounding environment, etc., achieving complete reaction, high hardness removal efficiency, and saving chemicals cost effect

Inactive Publication Date: 2015-04-08
INNER MONGOLIA JIUKE KANGRUI ENVIRONMENTAL TECH
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Problems solved by technology

[0021] The above methods for removing hardness all have the disadvantages of large consumption of chemicals,

Method used

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  • Softening device for treating high-hardness, low-alkalinity salt-containing wastewater
  • Softening device for treating high-hardness, low-alkalinity salt-containing wastewater

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[0046] The present invention will be further explained below in conjunction with the drawings:

[0047] Such as figure 1 with figure 2 As shown, the structure of the softening device for treating high-hardness, low-alkalinity saline wastewater according to the present invention is as follows:

[0048] A softening device for treating high-hardness, low-alkalinity, salt-containing wastewater, including: pool body base 2, settling tank 10, production pool 8, water production pipe 9, mud pipe 13 and mud pump 14, and pool body base 2 are arranged side by side with a sedimentation tank 10 and a production tank 8, the sedimentation tank 10 and the production tank 8 are communicated through a water production pipe 9, and the mud pipe 13 communicates with the bottom of the sedimentation tank 10 through a mud pump 14, which also includes the inlet Water pipe 5, dosing pipe 7, air inlet pipe 1, water distributor 11, pipeline mixer 6, microporous aeration pipe 3, mixer 15 and water outlet we...

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Abstract

The invention relates to a softening device for treating high-hardness, low-alkalinity salt-containing wastewater and belongs to the field of water treatment in environmental protection. A settling tank and a water-production tank are arranged on a tank body pedestal of the softening device, an inverted stirrer is arranged in the settling tank, a water outlet weir is arranged above the settling tank, a mixing reaction zone and a settling zone are sequentially arranged at the upper part and a lower part of the settling tank, microporous aeration pipes are arranged at the upper part of the settling zone and are communicated by virtue of gas inlet pipes; and water distributors are arranged in the middle of the settling zone and are communicated with water inlet pipes, pipeline mixers are arranged on the water inlet pipes, and chemical agent adding pipes are arranged on the pipeline mixers. According to the softening device, by adding carbon dioxide and caustic soda into the wastewater, chemical agent addition, gas distribution, stirring and reaction are performed in the softening device so that carbon dioxide and caustic soda and calcium and magnesium ions in water are reacted to achieve the removal of water hardness, the utilization efficiency is increased, the dust pollution is avoided, the energy consumption is decreased, the chemical agent cost is saved, the removal rate of the hardness is very high and the reaction is completely performed.

Description

technical field [0001] The invention belongs to the field of water treatment in environmental protection, and relates to a softening device for treating waste water with high hardness and low alkalinity containing salt. Background technique [0002] At present, several common treatment methods for the removal of hardness in industrial saline wastewater are: lime softening method, lime-soda ash softening method, lime-gypsum treatment method and double alkali method. [0003] Lime softening method is usually used for water with high hardness and high alkalinity; lime-soda ash softening method or double alkali method is used for water with high hardness and low alkalinity; and lime-soda softening method is used for negative hard water with low hardness and high alkalinity. Gypsum treatment. [0004] Lime softening method: In order to avoid dust pollution caused by adding quicklime (CaO), the quicklime is usually made into slaked lime (Ca(OH)2, that is, slaked lime) for use, an...

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Application Information

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IPC IPC(8): C02F5/02
Inventor 赛世杰王俊辉刘慧杭天浜刘丹茹孟庆军李思序李乐郭默然姚红锐
Owner INNER MONGOLIA JIUKE KANGRUI ENVIRONMENTAL TECH
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