Aluminium alloy chromate-free overall agent compatibility treatment and wastewater zero discharge system

Abstract

An aluminium alloy chromate-free overall agent compatibility treatment and wastewater zero discharge system comprises an agent compatible system and a series-opposing water-saving system, wherein the agent compatible system consists of a 1# deburring and degreasing bath and a 7# chromate-free passivation bath; the series-opposing water-saving system consists of a water washing compatible subsystem provided with not less than three non-mobile water washing baths, and an agent recycling subsystem provided with not less than one non-mobile water washing bath; the 1# deburring and degreasing bath, the water washing compatible subsystem and the agent recycling subsystem are in series-opposing arrangement on the whole, and a water inlet is formed in the starting end in the water flowing direction and connected with a water inflow channel by a water inflow control valve; and the 7# chromate-free passivation bath is arranged between the water washing compatible subsystem and the agent recycling subsystem. Due to the configuration of washing water series-opposing connection and agent retention and recycling on the basis of agent compatibility, the wastewater zero-discharge water-saving system is realized.

Description

technical field [0001] The invention relates to the technical field of surface treatment of aluminum materials, in particular to a chromium-free integral agent-compatible treatment of aluminum alloys and a waste water zero-discharge system. Background technique [0002] The layout of standard chromized line slots is as follows: figure 2 As shown, it includes 1# acid degreasing tank, 2# flowing water washing tank, 3# flowing water washing tank, 4# chromizing tank, 5# flowing water washing tank and 6# flowing water washing tank. Among them, 1# acid degreasing tank and 4# chromizing tank are working tanks, 2#, 3# and 4#, 5# are two sets of independent flowing water washing tanks, that is, two chemical tanks, two sets of flowing water washing tanks, tap water 2 in and 2 out. The layout of standard chromized line slots has the following disadvantages: [0003] 1. The deburring ability of 1# acid degreasing tank is not enough. Although this tank is added with 50-80g / L sulfuric...

AI Technical Summary

Problems solved by technology

For this reason, the aluminum material factory specially dispatched workers to deburr with a cloth wheel machine first, then degrease and chromize, which was time-consuming and laborious, and the effect was low;

[0004] 2. The 4# chromating tank contains chromic anhydride and fluorine, which pollutes the 5# and 6# flowing washing tanks and increases the cost of wastewater treatment;

[0005] 3. The 4# chromating tank contains chromic anhydride and fluorine. When the aluminum material is hung, the acid mist containing chromic anhydride and hydrogen fluoride will pollute the workshop, seriously endangering the health of workers;

[0006] 4. The 4# chroming tank contains chromic anhydride, and the surface of the aluminum material after chromizing contains hexavalent chromium. Such aluminum profiles enter thousands of households, and the potential harm to users is very terrible. After decades, when these aluminum profiles contain When the hexavalent chromium aluminum profile enters the recycling period, how to supervise and deal with it is a huge social problem;

[0007] 5. The 1# acid degreasing tank contains phosphorus and fluorine, which pollutes the 2# and 3# flowing washing tanks and increases the cost of wastewater treatment;

[0008] 6. 2#, 3# and 5#, 6# are two sets of independent water washing systems. The tap water enters from the 3# tank and exits from the 2# tank in reverse series; similarly, the tap water enters from the 6# tank and the 5# tank Out, in reverse series; two sets of cleaning water systems are not connected to each other, double the amount of cleaning water, double the cost of wastewater treatment

[0011] 2. The corrosion ability of 4# alkaline etching tank is too strong, and the aluminum consumption is too high, which will increase the huge cost of aluminum consumption

Statistics show that the aluminum consumption of 4# alkali etching tank is 6-10Kg / ton of material, and the cost of aluminum consumption for this tank is more than 100 yuan / ton of material; in addition, the waste water and slag formed by aluminum consumption must be treated, and the cost will further increase;

[0012] 3. The process is too long, greatly reducing work efficiency

[0015] 1. It is necessary to build sedimentation tanks, filters, etc., which will increase equipment investment;

[0016] 2. Sedimentation tanks and filters need special personnel to take care of them, which increases labor costs;

[0017] 3. The deburring ability of the degreasing tank is not enough, and the scrap rate is high;

[0018] 4. The 1# degreasing tank and the 5# passivation tank are not completely compatible, and need to be separated by a flowing water washing tank, and then recycled after treatment;

[0019] 5. The 5# passivation tank uses organic alcohol as a corrosion inhibitor. If it is used for a long time, the bacteria will multiply and the bath will become smelly, which will affect the production environment.

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