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Treatment and special treater of waste water in making salt and nitro-group

A waste water treatment, waste water technology, applied in the direction of water/sewage treatment, heating water/sewage treatment, water/sewage multi-stage treatment, etc., can solve the problems of complex process technology, large equipment investment, high separation cost, etc., to achieve simple process, Less investment in equipment, good separation effect

Inactive Publication Date: 2006-08-16
上海太平洋化工(集团)淮安元明粉有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the nitrate-salt cogeneration technology of Sulzer, Switzerland can be used to treat the above-mentioned Na 2 SO 4 Salt-making wastewater, but the investment in the equipment is large, the process technology is complicated, the separation cost is high, and the separation effect is poor
At present, there is no known technology that can be used to treat the above-mentioned nitrification waste water containing NaCl

Method used

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  • Treatment and special treater of waste water in making salt and nitro-group

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Effect test

Embodiment 1

[0019] A kind of nitrate making (salt making) wastewater treatment method described in the present embodiment comprises the following steps:

[0020] 1. Heating

[0021] The wastewater is heated to 60°C and maintained at this temperature.

[0022] 2. Add salt

[0023] Adding NaCl to the wastewater makes the Na in the wastewater 2 SO 4 Just right at the saturation point.

[0024] 3. Thickening

[0025] Thickening treatment is carried out for the waste water treated in step 2, so that the Na 2 SO 4 Crystallized out.

[0026] 4. Separation

[0027] For the wastewater treated in step 3, use a centrifuge or other existing processes to separate Na 2 SO 4 Crystals and NaCl slurry.

Embodiment 2

[0029] A kind of nitrate making (salt making) wastewater treatment method described in the present embodiment comprises the following steps:

[0030] 1. Heating

[0031] The wastewater is heated to 100°C and maintained at this temperature.

[0032] 2. Add salt

[0033] Adding NaCl to the wastewater makes the Na in the wastewater 2 SO 4 Just right at the saturation point.

[0034] 3. Thickening

[0035] Adopt thickener or other existing thickening equipment to carry out thickening treatment for the waste water processed through step 2, make the Na in the waste water 2 SO 4 Crystallized out.

[0036] 4. Separation

[0037] For the wastewater treated in step 3, use a centrifuge or other existing processes to separate Na 2 SO 4 Crystals and NaCl slurry.

Embodiment 3

[0039] A special equipment for wastewater treatment of nitrate or salt production described in this embodiment includes a tank body 2, a circulation pipe 7, a circulation pump 8, a waste water inlet 5, a salt inlet 6, Na 2 SO 4 Slurry outlet 4, overflow port 1, suspended bed 3, etc., wherein the tank body 2 is a cylindrical container, the tank body 2 is provided with a heating device, the bottom of the tank body 2 is provided with a suspended bed 3, and one end of the circulation pipe 7 is located at The upper part of the tank body 2, the other end is arranged at the lower part of the tank body 2 and the suspension bed 3, and the circulating pump 8 is arranged in the circulating pipe 7 to transport the liquid in the upper part of the tank body 2 to the lower part of the tank body 2, and the circulating pipe 7 Also be provided with waste water inlet 5 and salt adding port 6, are respectively used for supplementing the waste water in the tank body 2 and adding salt to waste wate...

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Abstract

Treatment of nitre making or salt-making wastewater and its special apparatus are disclosed. The process is carried out by heating waste water to 60~100DEG C, adding NaCl into waste water, controlling Na2SO4 on saturation point, thickening treating for waste water to crystallization precipitating Na2SO4, and separating Na2SO3 crystal and NaCl pulp from waste water. The nitre making (salt-making) apparatus consists of pot, circulating pipe, circulating pump, wastewater inlet, salt-feeding opening, Na2SO4 pulp outlet and spillway. One side of circulating pipe is set on the top of pot, and another end is set on the bottom of pot. The circulating pipe is arranged with circulating pump, waster water inlet and salt-feeding opening. It is simple, less investment and has better separation effect.

Description

technical field [0001] The present invention relates to a kind of waste water treatment method and its special equipment, especially refers to the process of making nitrate or salt containing low concentration Na 2 SO 4 Wastewater treatment method and its special equipment. Background technique [0002] Preparation of Na 2 SO 4 The wastewater usually contains >60g / L NaCl, while the wastewater from NaCl usually contains >30g / L NaCl 2 SO 4 . At present, the nitrate-salt cogeneration technology of Sulzer, Switzerland can be used to treat the above-mentioned Na 2 SO 4 Salt-making wastewater, but the investment in the equipment is large, the process technology is complex, the separation cost is high, and the separation effect is poor. At present, there is no known technology that can be used to treat the above-mentioned nitrification waste water containing NaCl. Contents of the invention [0003] The object of the present invention is to provide a kind of waste w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04C02F1/04C02F1/58C01D5/00
Inventor 唐伯祥王斌涛居忠
Owner 上海太平洋化工(集团)淮安元明粉有限公司
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