Method for treating C5 resin wastewater

Abstract

The invention discloses a method for treating C5 resin wastewater, belongs to the technical field of wastewater treatment, and mainly solves the technical problems of corrosion and blockage of downstream pipelines of a C5 resin production system, paralysis of a sewage treatment system and environmental pollution in the prior art. The method comprises the following steps: discharging wastewater produced by a C5 resin device into an oil separation tank for oil separation treatment, separating resin gel floating matters, grease such as heavy oil and other solid substances in the high-salinity wastewater, neutralizing the high-salinity wastewater with concentrated sulfuric acid in a neutralizing tank until the pH value is 7.0-8.0, so that aluminum hydroxide in the high-salinity wastewater is precipitated in a granular form, and separating the solid substances in the high-salinity wastewater; and solid-liquid separation can be carried out through a filtering means, so that wastewater treatment of the C5 resin device is completed. According to the C5 resin wastewater treatment method provided by the invention, corrosion and blockage of a downstream pipeline of a C5 resin production system are avoided, and the risk of environmental pollution caused by paralysis of a downstream sewage biochemical treatment system is also reduced.

Description

technical field [0001] The invention relates to waste water treatment technology, in particular to a method for treating carbon five resin waste water. Background technique [0002] In the production process of carbon five petroleum resin, the raw material of the polymerization kettle is added to the catalyst according to a certain proportion, and through the catalysis of the catalyst, the carbon five hydrocarbons are polymerized at a certain temperature, and the polymerized material is mixed with water and a certain amount of lye , to remove the catalyst in the polymerization solution, and the wastewater from the polymerization solution is alkaline. [0003] In order to meet the operation of the device, the pH value is adjusted to strong alkaline during the alkaline cleaning process, and the pH value of the discharged wastewater reaches between 12.5 and 13.0. The alkaline wastewater produced is mainly produced by neutralizing the acidic catalyst with sodium hydroxide, of wh...

AI Technical Summary

Problems solved by technology

If the waste water is not treated, it will not only cause corrosion and blockage of the pipeline downstream of the system, but also cause paralysis of the downstream sewage biochemical treatment system and cause environmental pollution and other problems.

If the pH value of the alkali elution catalyst system of the carbon five resin unit is lowered during the production process, the pipeline of the alkali washing system will be fouled and blocked, which will affect the operation cycle

[0004] At present, the wastewater produced by C5 petroleum resin is neutralized by setting up a high-saline water neutralization pool treatment device to drop related acids to the high-saline water. After a large amount of suspended solids are generated, flocculants are added to make it Suspended solids coagulate and precipitate, but after adding flocculant, the COD contained in the wastewater increases correspondingly, which seriously affects the treatment of wastewater

Suspended solids that have not been coagulated by flocculants cannot be thoroughly filtered or centrifuged. In the existing high-saline water treatment equipment, even if a neutralization and sedimentation system is installed, it cannot be separated due to the large amount of suspended solids produced. The only way to deal with it is to discharge the clear water on the upper layer after a long period of natural settlement, but the required settlement site and settlement time are very large, which does not meet the requirements of chemical companies with continuous production needs, and the discharge water will entrain some sediments to the surrounding areas. Serious pollution of water bodies and fouling of sewer lines

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