Waste mother liquor treatment technology

Abstract

The invention belongs to the field of hazardous waste treatment, and particularly relates to a waste mother liquor treatment technology. In allusion to current problems in the waste mother liquor treatment process, an effective waste mother liquor treatment technology is provided. When organic high-concentration spent liquor or low-salt wastewater is treated, the spent liquor treatment effect is affected due to insufficient salt content and low unit adsorbing capacity of salt surface. By adding soluble salt as an adsorption carrier of waste mother liquor generated by chemical synthetic reactions, the above problem is solved, and organic wastewater which is hard to treat by a traditional evaporative crystallization mode is changed. The pretreatment technological method is unique, provides agood treatment basis for follow-up salt treatment process, and helps to solve the problem that organic waste mother liquor is hard to effectively treat for a long time.

Description

technical field [0001] The invention belongs to the field of hazardous waste treatment, and in particular relates to a process for treating waste mother liquor. Background technique [0002] A large amount of waste liquid will be produced in chemical and chemical production. These waste liquids are characterized by high concentration of organic matter and some high concentration of salt. If they are discharged directly without treatment, the refractory organic matter and High concentrations of soluble inorganic salts will cause serious pollution to the environment. [0003] At present, there are many kinds of treatment methods for these waste liquids, but there are more or less defects. For example, biological treatment, although the research and development of some halophilic bacteria has improved the salt tolerance of these pollutants, but these halophilic bacteria are still limited by the environment, and the treated wastewater still contains a large amount of inorganic ...

AI Technical Summary

Problems solved by technology

For example, biological treatment, although the research and development of some halophilic bacteria has improved the salt tolerance of these pollutants, but these halophilic bacteria are still limited by the environment, and the treated wastewater still contains a large amount of inorganic salts; while some traditional physical The chemical method also has the disadvantages of high energy consumption and high cost; incineration is also a common method for organic waste liquid. The vaporization of waste liquid with too high moisture will take away a lot of heat, increase the amount of auxiliary fuel, and increase the treatment cost; With the development of fluidized bed technology, the application of fluidized bed incinerators in waste disposal is becoming more and more extensive. Although fluidized bed incinerators have many advantages compared with ordinary incinerators in the treatment of high-concentration organic waste liquid, However, there are also some technical difficulties, such as the problem of coking and slagging in the furnace. Since the salts in the waste liquid are mainly alkali metal salts, these salts have low melting points, and crystals with lower melting points are easily formed in the bed during the incineration process. The melting point is in the range of 635-815°C, which will cause sintering and fluidization failure of the bed material, which will lead to serious coking of the bed layer and affect the normal operation of the treatment process. Below the melting point, but low-temperature incineration can easily cause problems such as incomplete combustion and dioxin emissions

Evaporation and desalination method is an important means to realize the reduction of waste liquid, but in practice, it has high requirements on the corrosion resistance of equipment, and finally discharges high-concentration and nearly saturated waste water concentrate, which cannot completely dispose of high-concentration salt-containing organic waste liquid

[0004] Therefore, there is no environmental protection, effective, and low economic cost in the prior art, which is suitable for industrialized application of waste mother liquor treatment process