Pickling sewage treatment works
Release time:
2024-06-25
Pickling process is an essential process for galvanizing, electroplating, metal products, machinery manufacturing, steel, metal materials and other industries. Pickling wastewater usually includes: deoiling (grease) wastewater; hydrochloric acid, sulfuric acid, nitric acid, hydrofluoric acid, phosphoric acid and other monoacid or several mixed acid wastewater; flushing wastewater and purification wastewater. According to different products, enterprises in various industries add chemical additives and other auxiliary materials in the degreasing and phosphoric acid purification process. Local environmental protection bureaus formulate different discharge standards for different types of enterprises according to the functional zoning of local waters. In the same region, different industries have different emission substances and emission standards. Pickling enterprises must formulate treatment modes and specific contents according to the emission standards.
Case analysis
CASE ANALYSIS
Product classification: Pickling sewage treatment engineering
Project Name: Sewage Treatment Project of a Metal Enterprise in Dongguan
Pollution control type: pickling wastewater and daily sewage treatment
Processing scale: daily processing capacity of 80 tons
Implementation of standards: integrated emission standards
Treatment process: using coagulation sedimentation inclined tube sedimentation quartz filtration treatment process
Project Description: Pickling Sewage Treatment Project, the treatment water volume of the project is 80m ³/d, and the treatment effect reaches the national first-class discharge standard.
Characteristics and difficulties of pickling wastewater treatment
CHARACTERISTICS AND DIFFICULTIES OF PICKLING WASTEWATER TREATMENT
Pickling process is an essential process for galvanizing, electroplating, metal products, machinery manufacturing, steel, metal materials and other industries. Pickling wastewater usually includes: deoiling (grease) wastewater; hydrochloric acid, sulfuric acid, nitric acid, hydrofluoric acid, phosphoric acid and other monoacid or several mixed acid wastewater; flushing wastewater and purification wastewater. According to different products, enterprises in various industries add chemical additives and other auxiliary materials in the degreasing and phosphoric acid purification process. Local environmental protection bureaus formulate different discharge standards for different types of enterprises according to the functional zoning of local waters. In the same region, different industries have different emission substances and emission standards. Pickling enterprises must formulate treatment modes and specific contents according to the emission standards.
Inlet water quality and outlet water quality
WATER QUALITY AND WATER QUALITY
Effect after treatment
THE EFFECT AFTER TREATMENT
The sewage treatment system designed for the metal enterprise has good effluent quality, and the main water quality index can meet the discharge standard, which can well adapt to the unstable influent water quality. The effluent of the system can meet the comprehensive sewage discharge standard, which effectively solves the problem of not meeting the standard. According to the actual requirements and design process, the treatment process of coagulation sedimentation inclined tube sedimentation quartz filtration is adopted to improve water quality, meet the requirements of effluent standards and ensure the long-term stable operation of the sewage treatment system.
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