CN1683602A

CN1683602A - On-line nickel recovering integrated machine for electroplating production line

Info

Publication number: CN1683602A
Application number: CN 200510053288
Authority: CN
Inventors: 陈启松
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-02-25
Filing date: 2005-02-25
Publication date: 2005-10-19

Abstract

The on-line nickel recovering apparatus for electroplating production line precisely filters, evaporates and concentrates the first nickel plating washing water and returns the concentrated washing water directly to the electrolytic bath; treats the second and third washing water through ion exchange process to obtain nickel sulfate solution while obtaining effluent from the mixed column for returning to the production line. The present invention realizes the on-line recovery of nickel and washing water and has raised economic utility and reduced environmental pollution.

Description

On-line nickel recovering integrated machine for electroplating production line

A kind of device that is used for the online recovery nickel of electroplating assembly line metal is a kind of being installed in by the electroplating assembly line specifically, by the processing to the nickel plating washing water, reclaims noble metal nickel; Simultaneously, can reclaim the device of corresponding pure water.

In recent years, the electroplating industry fast development, China has thousands of electroplating assembly lines, mainly be distributed in the Yangtze River Delta and Zhu's tessellated region, electroplating used plating material mainly is precious metals such as copper, chromium, nickel, one-level, secondary, three grades of rinsings are generally arranged behind each road electroplating work procedure, and washing process can be taken the part precious metal out of.The regular practice of present domestic the sector is washing water directly to be discharged into Sewage Plant handle; The conventional processing way that adopts be by physico-chemical process with heavy metal precipitation, the consequence of generation is: both wasted precious metal, may cause secondary heavy metal contamination again.For this reason, both at home and abroad the expert has done a large amount of effort, attempts online recovery nickel metal; But effect is often undesirable.As the evaporation concentration absorption method, because water running expense per ton about 100 yuan, can't receive on the Technological Economy; Though membrane separation technique can reclaim pure water, also can obtain the precious metal concentrated solution simultaneously, because the existence of electroplating additive makes the life-span of film become big problem; By the non-reversibility (next procedure is not applicable to last process) of additive, it is unrealistic that online recovery is become simultaneously.

The objective of the invention is: provide a kind of all-in-one (precious metal principles such as copper, chromium are the same) that can realize that the online nickel of electroplating assembly line reclaims can effectively solve an above-mentioned difficult problem, when reclaiming precious metal nickel, can also obtain corresponding pure water, be a kind of cleaning (or zero release) technology of carrying out production strictly in line with rules and regulations from essential meaning.

The technical solution adopted for the present invention to solve the technical problems is: to one-level nickel plating washing water, adopt secondary filter to add the way of evaporation concentration, direct reuse is to coating bath; Adopting two positive the moon to add an ion exchange method of mixing to two, three grades of washing water separates; Two cationic exchange coloum series connection are used alternatingly.Can get NiSO4 solution from one-level sun column regeneration; The mixing column water outlet can reach the pure water level, and direct reuse is to production line; Thereby realize that online nickel reclaims and the purpose of corresponding pure water recovery.

The invention has the beneficial effects as follows: can realize online recovery to the precious metal nickel (copper, chromium are too) that produces in the electroplating assembly line production process, can also reclaim corresponding washing water simultaneously; Both can be enterprise and directly created good economic benefit (generally investment then is recoverable then); Can avoid heavy metal contamination again, have good social benefit environment.

Below in conjunction with drawings and Examples the present invention is further described

Fig. 1 is a schematic diagram of the present invention

Among Fig. 1: 1, housing system 2, vaporizer 3, microfroc filter 4, cationic exchange coloum 5, cationic exchange coloum 6, anion-exchange column 7, mixed type ion exchange column

" on-line nickel recovering integrated machine for electroplating production line " as shown in the figure, the microfroc filter (3) that vaporizer (2) is housed in whole housing system (1) and joins with it, the two be combined into first recovery system: i.e. the nickel recovery system of one-level washing water; In addition, cationic exchange coloum (4), cationic exchange coloum (5), anion-exchange column (6) and mixed type ion exchange column (7) also are housed in housing system, and the organic assembling of (two sun one cloudy mix) four becomes second recovery system: the nickel recovery system of the unnecessary washing water of secondary and three grades of washing water.

In Fig. 1, electroplate final stage groove by A to after the suitable evaporation concentration of vaporizer (2), replenishing from the one-level washing water of nickel plating production line through housing system inflow microfroc filter (3), directly reclaim.To entering, G is to derivation by F in the heating steam of vaporizer (2); Be evaporated gas by H to derivation.The secondary washing water except that additional one-level rinse bath, unnecessary washing water and three grades of washing water in the lump by C to flowing into cationic exchange coloum (4), (5), again through anion-exchange column (6) and mixed type ion exchange column (7) through housing system (1); Water outlet is the pure water state; Directly by E to derivation, the plating production line of wiring back is made three grades of washing water and is used.The bath water of secondary replenishes by three grades, and the one-level bath water is replenished by secondary, and this process also claims countercurrent washing.When cationic exchange coloum (4) when reaching capacity, regenerating with dilute sulphuric acid to get NiSO ₄Solution, by D to adding to nickel plating chopped-off head groove.Back two cationic exchange coloums of regenerating exchange use: promptly (4), (5) are used alternatingly mutually.After reaching capacity, anion-exchange column and mixed type ion exchange column (be mainly additive and SO ₄ ^{+ 2}And Cl ^-1), can use diluted alkaline and rare NaCl water reuse respectively.

Claims

1, a kind of device that is used for the online recovery nickel of electroplating assembly line metal is characterized in that: the one-level washing water from the nickel plating production line are introduced microfroc filter, electroplate the final stage groove after can replenish after the suitable evaporation concentration of vaporizer, directly reclaim;

2, online nickel retrieving arrangement according to claim 1, it is characterized in that: the unnecessary washing water of secondary and three grades of washing water are introduced the cationic exchange coloum of two-stage tandem in the lump again through anion-exchange column and mixed type ion exchange column, water outlet is the pure water state, and the plating production line of wiring back is made three grades of washing water and used; When cationic exchange coloum reached capacity, regenerating with dilute sulphuric acid to get NiSO ₄Solution adds to nickel plating chopped-off head groove, and back two cationic exchange coloums of regenerating exchange use.