SU1539242A1 - Unit for electroplating metal articles - Google Patents

Abstract

The invention relates to equipment for electroplating and can be used in ferrous and non-ferrous metallurgy, mechanical engineering and other areas of the national economy. The purpose of the invention is to reduce the consumption of salts of non-ferrous metals and water consumed. Wash water from bath 6 through line 8 is drained to installation 10 of membrane cleaning and concentration of effluent containing non-ferrous metal salts. From unit 10, demineralized water is transferred through conduit 11 to reservoir 12, and the concentrate is conveyed through conduit 13 to reserve reservoir 14, from where it is returned to baths 4 using replenishment and filtration system 15 to replenish them. Wash water from baths 3 through conduit 20 enters reagent neutralization system 21, here with this pump 19 discharged acidic wastes are dispensed, which are discharged through conduit 17 to tank 18 from baths 2, 4 and 5 through collector 16. Neutralized drains through system overflow pipe 21 are directed to clarifier 22 for clarification. The design features of the unit make it possible to reduce the consumption of water consumed and to reduce the pollution of water bodies. 1 hp f-ly, 1 ill.

Description

The invention relates to equipment for electroplating and can be used in ferrous and non-ferrous metallurgy, mechanical engineering and other areas of the national economy.

The purpose of the invention is to reduce the consumption of non-ferrous metal salts and water consumption by separately desalting the wash water and then combining them.

The drawing shows a schematic diagram of the unit.

The device comprises a degreasing bath 1, an etching bath 2, a rinsing bath 3 after degreasing and etching, an electroplating bath 4, a trap bath 5, a rinsing bath 6 after coating, a drying chamber 7 and an auto-operator 8 with an automatic control system (not shown), The outlets from the baths 6 by the pipeline 9 are connected to the inlet of the installation 10 of membrane cleaning and concentration of effluents containing salts of non-ferrous metals, the filtrate outlet of which is connected to the tank 12 with a tank 12 for desalting water, and the course of the concentrate by pipeline 13 is connected to the reserve capacity 14 for the electrolyte; To the output of the reserve capacity 14, a system 15 for pumping and filtering the electrolyte is connected. The drain from bath 2 and discharge manifold 16 from baths 4 and 5 are connected via conduit 17 to reservoir 18 for concentrated acidic effluents, to the outlet of which a metering pump 19 is connected, connected to discharge conduit 20 from wash baths 3. The other end of conduit 20 is connected to a reagent neutralization system 21 connected to a settling tank 22. The sludge is removed from the settling tank 22 by

pump 23 connected to a filter

5 24, and the overflow from the settling tank 22 is connected in parallel with the sorption filters 25, the outlets of which are connected by a pipe 26 to the first section of the settling tank 22 and a pipe 27 - with

0 by installation of 28 membrane desalting.

The filtrate outlet from the unit 28 is connected to the demineralized water tank 12, to the outlet from which the water supply pipe 29 is connected

baths 3, 5 and 6, the drain from the baths 1 is connected by pipeline 30 to the pumping system 31 and ultrafiltration cleaning of the degreasing solution,

0 the exit of which is connected to the pipeline 32 return degreasing solution.

The device works as follows.

Auto operator 8 moves metal products sequentially through baths 1, 2, 3, 4, 5, 6 and 7 with working solutions and running water for rinsing. Wash water from bath 6

Q through line 9 is discharged into the installation of 10 membrane cleaning and concentration of effluents containing salts of non-ferrous metals. From installation 10 demineralized water through the pipeline

5 11 is sent to tank 12, and the concentrate is directed via pipeline 13 to reserve tank 14, from where it is returned to bath 4 using a pumping and filtering system 15 for replenishment. Wash water from the baths 3 through the pipeline 20 enters the system 21 reagent neutralization 21, then pumped by this pump 19 discharged acidic wastewater, which through the pipeline 17 is discharged into the tank 18 from the baths 2, 4 and 5 through the collector 16 21 sent to sump 22 for clarification

The precipitate formed in the settling tank 22 is pumped by the pump 23 to the filter 24 for dewatering, and the filtrate is returned to the last section of the settling tank 22. The clarified water is fed in parallel to the sorption filters 25 (through the top to clean the sorbent). The water after sorbent loosening through conduit 26 is dumped into the first section of the settling tank 22. Water purified from organic impurities through conduit 27 is fed to the installation 28 of membrane desalting and desalted water is collected into tank 12, from where the conduit 29 is fed to baths 3, 6 of product washing and in baths 1, 2, 5 to replenish the working solutions. The spent degreasing solution from the bath 1 through line 30 is discharged to the pumping system 31 and ultrafiltration cleaning of the degreasing solution to remove mechanical contaminants and oils. The cleaned degreasing solution through the pipeline 32 is returned to the bath 1.

The design features of the unit make it possible to significantly reduce the consumption of salts of non-ferrous metals and water consumed, and to reduce the pollution of water bodies.

Claims (2)

Claim 1, Electroplating unit for metal products containing surface preparation baths, electroplating baths, rinsing baths, automatic transfer mechanism 15 20 the displacement of products from the bath to the bath, the filtration system and the pumping of working solutions and the reagent neutralization of the effluent with a sump, which is because in order to reduce the consumption of salts of non-ferrous metals and water consumed by separate desalting of the wash water and their subsequent combination, it is equipped with a membrane cleaning and concentration plant for wastewater with non-ferrous metal salts, a membrane desalination plant, a demineralized water tank and a reserve electrolyte tank, while draining after electroplating, it is connected to the inlet of a membrane purification and wastewater concentration plant, the outlet of its filtrate is connected to a tank for demineralized water, and the outlet of the concentrate is connected to the inlet of a reserve electrolyte tank, the outlet of which is connected to baths electrolyte transfer and filtering systems electroplating, the outlet from the clarifier 30 of clarified water after reagent neutralization is connected to the inlet of a membrane desalting plant and a concentrate No wastewater, and the output of the installation - with a container for desalinated water. 35 2. An assembly according to claim 1, characterized in that it is equipped with sorption filters connected by means of pipeline valves to a settling tank and installation for membrane desalting. 25