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SO2 alkali absorption tower salt-containing wastewater treatment process

A technology for salt-containing wastewater and treatment process, which can be used in water/sewage treatment, oxidized water/sewage treatment, gaseous discharge wastewater treatment, etc., and can solve problems such as environmental pollution

Pending Publication Date: 2021-07-30
南京奇诺自控设备有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of SO 2 Alkaline absorption tower salty wastewater treatment process aims to solve the technical problem that the salty wastewater in the prior art is mostly diluted and discharged through the sewage treatment station of the factory, which is easy to pollute the environment

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  • SO2 alkali absorption tower salt-containing wastewater treatment process

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Embodiment Construction

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0026] In describing the present invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientation or positional relationship indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than Nothing indicating or implying that a referenced device or element...

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Abstract

The invention relates to the technical field of wastewater treatment, in particular to an SO2 alkali absorption tower salt-containing wastewater treatment process which comprises the following steps: respectively conveying a sodium nitrite aqueous solution and oxygen-containing air into an oxidation tower for oxidation reaction to obtain a sodium sulfate aqueous solution; putting the sodium sulfate aqueous solution into a batching tank, adding reactants at the same time, and then uniformly conducting mixing to obtain slurry; and conveying the slurry to a high-pressure pump for pressurization, and then feeding the pressurized slurry into an evaporation granulation tower for atomization to form adornment particles. A small amount of heat is supplemented through hot air generated by the salt-containing wastewater and the reaction heat of the device to produce the colored ornament in the washing powder, so that the influence of discharge of the salt-containing wastewater on the environment can be effectively solved, and better economic benefits and social benefits can be generated.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a SO 2 Alkaline absorption tower salty wastewater treatment process. Background technique [0002] currently on SO 3 In sulfuric acid and sulfonation processes, SO 2 Conversion between 97-98%, no conversion to SO 3 SO 2 Since it does not participate in sulfonation, it is brought into the exhaust gas, in SO 2 In the alkali absorption tower, it reacts with aqueous sodium hydroxide solution to form sodium sulfite Na 2 SO 3 Aqueous solution, sodium sulfite aqueous solution content is 10%, containing 10% sodium sulfite as waste water discharge. [0003] Since the current domestic environmental protection requires that the salt content of saline wastewater is not more than 2000mg / L, that is, the salt content is less than 0.2%, so SO 3 Alkaline absorption wastewater from the sulfonation unit cannot be discharged up to the standard and must be treated. At present, t...

Claims

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Application Information

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IPC IPC(8): C02F1/72B01J2/04C02F103/18
CPCC02F1/727B01J2/04C02F2103/18
Inventor 张挥本刘昌兵
Owner 南京奇诺自控设备有限公司