Pre-treatment equipment management and maintenance


Pre-treatment equipment management and maintenance

 Pre-treatment equipment in operation should be routine maintenance and regular maintenance, maintenance content and maintenance frequency is shown in Table 3-5 and Table 3-6.

Table 3-5 Pre-treatment equipment routine maintenance

 

Inspection items

Item

Standard

Remarks

Each process

Metal mesh (strainer)

Normal

 

Nozzle, spray pipe

Normal

 

 

Pressure

Given value

 

 

Temperature

Given value

 

 

Spraying of spraying

Given value

 

 

Pumps, motors

Normal

 

 

Liquid level in the tank

Given value

 

 

Heating unit

Heat supply

Normal

 

Heat exchanger population temperature

Given value

Record Adjustment

 

Circulation system pressure

Given value

Sweeping

 

Heated oil-water separator

Temperature

Normal

Record Adjustment

Circulating fluid volume

Given value

Adjustment

 

Discharge oil volume

Normal

Records

 

De-slagging device

Circulating fluid volume

Given value

Adjustment

Clearness of circulating back fluid

Normal

Sweeping

 

Residual discharge volume

Normal

Records

 

Pharmacological supplementation

Replenish the liquid volume in the tank

Normal

Recording, adjustment

Supplementary additions

Normal

Adjustment

 

Water supply

Given value

Adjustment

 

Other

Dosage of pharmaceuticals

Records

 

Number of units handled

Records

 

 

 

Table 3-6 Pre-treatment equipment regular maintenance

Work sequence

Item

Maintenance Frequency®

Remark

Pre-skimmed

Tank, circulation system

1/month

Waste cleaning

Degreasing

Tank, circulation system

1/12 months (less than 10,000 units/year)

1/6 month (1~50,000/year) 1/4 month (50,000+)

Inverted groove cleaning

Heated oil-water separator

1/month

1/6 months

Inspection and cleaning Cleaning Cleaning

 

First wash

Tank, circulation system

1/month

Waste cleaning

Second wash

Tank, circulation system

1/3 month

Waste cleaning

Tables

Tank, circulation system

1/month

Waste cleaning

Phosphorization

Tank, circulation system

1/12 months (less than 10,000 units/year)

1/6 month (1~50,000/year), 1/4 month (50,000+)

Inverted groove cleaning

1/12 months

Nitric acid cleaning or disassembly cleaning

 

 

Heat Exchangers

1/month

Nitric acid cleaning

 

1/year

Disassembly for cleaning

 

 

Nitric acid tank

1/year

Sweeping

 

De-slagging system

1/6 months

Sweeping

 

Third wash

Tank, circulation system

1/month

Waste cleaning

Fourth wash

Tank, circulation system

1/3 month

Waste cleaning

Pure water washing

Tank, circulation system

1/6 months

Waste cleaning

The frequency of ① is determined by reference to experience and relevant case records, and depends on the operation of the equipment.

 

 


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