How to reduce the problem of wastewater pollution in the production of chlorohydrins?

How to reduce the problem of wastewater pollution in the production of chlorohydrins?

In the modern chemical industry, the production of epoxy resin mainly uses the chlorohydrin process. The chlorohydrin method is based on ethylene oxide as raw material, through chlorohydrin, oxidation, neutralization and other process steps, the final preparation of epoxy resin. A large amount of wastewater will be produced in the production process of chlorohydrin method, which not only contains high concentration of organic matter, acid and alkali substances, salt, but also may contain toxic and harmful substances, causing serious pollution to the environment. Therefore, how to reduce the problem of wastewater pollution in the production of chlorohydrin has become a key problem to be solved urgently in the industry.

1. of Chlorohydrin Production Wastewater Pollution Status

Chlorohydrin production wastewater mainly includes cracking reaction wastewater, distillation wastewater, acid and alkali neutralization wastewater, etc. These effluents are characterized by high COD (chemical oxygen demand) values, unstable pH values, high salt content, and may contain refractory organic and toxic substances. If not treated, the direct discharge of these wastewater will cause long-term harm to the water environment, and even cause irreversible effects on the surrounding ecology. The high cost and technical difficulty of wastewater treatment also bring heavy economic burden to enterprises.

2. Chlorohydrin Production Wastewater Pollution Cause Analysis

1. High energy consumption in the production process The production process of chlorohydrins involves multiple reactions, many of which produce large amounts of wastewater, especially cracking reactions and distillation processes. The large amount of these wastewater and the high concentration of pollutants have brought great challenges to the subsequent treatment.

2. Complicated types of pollutants The pollutants in the wastewater produced by chlorohydrin process include organic matter, acid and alkali substances, salt and chloride. Among them, organic substances such as epoxy resin monomers, by-products, etc., are difficult to decompose by a simple method, resulting in increased difficulty in handling.

3. Low resource utilization efficiency At present, many enterprises have not realized the recycling of wastewater in the production process of chlorohydrin method, which leads to the waste of water resources and the increase of pollutant discharge. Some useful substances in wastewater are not recovered, further aggravating the environmental burden.

3. to Reduce Chlorohydrin Production Wastewater Pollution Measures

1. Optimize production process and reduce waste water generation Enterprises can reduce the amount of wastewater generated by optimizing the production process. For example, in cracking reactions and distillation processes, more efficient reactors and separation techniques are used to reduce the formation of by-products. By improving the sealing of the equipment, leakage and leakage are reduced, thereby reducing the amount of waste water generated.

2. Physical and chemical treatment combined with biological treatment For the waste water that has been produced, a combination of physicochemical treatment and biological treatment can be used. Physical and chemical treatment, including evaporation and concentration, flocculation and sedimentation technology, can effectively remove the salt and part of the organic matter in the wastewater. Biological treatment further reduces the COD value and toxicity of wastewater by using microorganisms to decompose organic matter. Combining these two methods can significantly improve the efficiency of wastewater treatment.

3. waste water resource utilization The resource utilization of wastewater is an important way to reduce the pollution of wastewater from chlorohydrin production. For example, by reusing the treated wastewater into the production process, the use of fresh water can be reduced and the water consumption of enterprises can be reduced. Some useful substances in wastewater, such as epoxy resin by-products, can be recycled into valuable products, further enhancing the economic benefits of enterprises.

4. Strengthening environmental management and monitoring Enterprises should strengthen the environmental management of wastewater treatment process and establish a perfect monitoring system. Through online monitoring equipment, real-time monitoring of wastewater discharge to ensure that wastewater treatment to meet national environmental standards. Maintain and update wastewater treatment facilities on a regular basis to ensure their efficient operation.

4. summary and prospect

The problem of wastewater pollution in the production of chlorohydrins is a complex and multifaceted challenge. By optimizing the production process, strengthening the research and development and application of wastewater treatment technology, promoting the utilization of wastewater resources and improving the environmental management system, the impact of wastewater pollution on the environment can be effectively reduced. In the future, with the advancement of technology and the further improvement of environmental protection policies, the problem of wastewater pollution from chlorohydrin production will be effectively solved, thereby promoting the development of the industry in a green and sustainable direction.