Chemical pharmaceutical wastewater pretreatment system

Abstract

The invention discloses a chemical pharmacy wastewater pretreatment system. The system is characterized in that the outlet of an ultrahigh concentration wastewater collection pool is connected with an MVR evaporator, evaporated water enters an evaporated water collection pool, and the evaporated water collection pool is connected with a buffer pool and a comprehensive wastewater equalization pool; the front portion of a high concentration wastewater collection pool is provided with an oil separation zone, the water outlet of the high concentration wastewater collection pool is connected with a first high concentration water sedimentation pool, and wastewater from the first high concentration water sedimentation pool enters the buffer pool; and the buffer pool is connected with a multidimensional electrocatalysis reactor, the water outlet of the multidimensional electrocatalysis reactor is connected with an inner electrolysis bath, the water outlet of the inner electrolysis bath is connected with a catalytic oxidation tank, the water outlet of the catalytic oxidation tank is connected with a pH adjusting pool, the water outlet of the pH adjusting pool is connected with a second high concentration water sedimentation pool, the outlet of the second high concentration water sedimentation pool is connected with a transfer pool, and the transfer pool is connected with the comprehensive equalization pool; and a low concentration wastewater collection pool is connected with the sedimentation pools, and an oil separation sedimentation pool is connected with the comprehensive equalization pool. The system improves the biodegradability of wastewater.

Description

technical field [0001] The invention relates to a wastewater treatment method, in particular to a wastewater pretreatment system in a chemical pharmaceutical factory. Background technique [0002] Wastewater from chemical pharmaceutical factories mainly comes from pharmaceutical intermediate production wastewater, equipment cleaning wastewater, plant floor cleaning wastewater, and domestic sewage, among which domestic sewage mainly comes from the drainage of canteens, toilets, and bathrooms in the factory area. [0003] The main sources of pharmaceutical intermediate production wastewater are: [0004] ① Process wastewater, such as various crystallization mother liquors, phase inversion mother liquors, adsorption raffinate, etc.; [0005] ② Washing waste water, including the washing water of reactors, filters, catalyst carriers, resins and other equipment and components, as well as the washing waste water of ground and utensils, etc.; [0006] ③ Recovery of residual liquid...

AI Technical Summary

Problems solved by technology

[0011] ③ The composition of wastewater is complex, containing substances that are difficult for microorganisms to degrade or even have a strong inhibitory effect on microorganisms, such as organic or inorganic salts, intermediate products, residual solvents, drug residues and decomposition products added during the reaction process. The presence of concentration can inhibit the growth of microorganisms in the case of small doses, prolong the start-up and acclimatization period of biochemical systems, reduce anaerobic gas production and biochemical treatment efficiency

[0012] ④Because the wastewater contains pharmaceutical components and is biologically toxic, the biodegradability of the wastewater is poor

[0013] ⑤The pH value of wastewater changes frequently and fluctuates in a large range; the pH value of wastewater is either acidic or alkaline

[0016] ⑧There are many drainage points, some wastewater is discharged intermittently, acidity and alkalinity and temperature change greatly, so a large collection and adjustment device is required

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