CN205603375U - Continuous type chromium -containing wastewater processing apparatus - Google Patents

Abstract

The utility model provides a continuous type chromium -containing wastewater processing apparatus for solve the problem that chromium -containing wastewater produced a large amount of mud, the scheme is including the electrolytic device, elevator pump, the ion exchange unit that communicate in proper order, still including concentrated machine, circulating slot. The utility model discloses have abilities such as the chromium -containing wastewater of processing, the production of the mud that significantly reduces, energy saving are worth wideling popularize in trades such as electroplating, leather, printing and dyeing.

Description

A kind of continuous way chromate waste water processing means

Technical field

This utility model relates to waste water disposal facility field, is specifically related to a kind of continuous way chromate waste water processing means.

Background technology

The pollution of chromium is maximum with chromic toxicity, hexavalent chromium compound can invade people's human body by digestive tract, respiratory tract, skin and mucosa, mainly accumulate in liver, kidney, hormonal system and pulmonary, there is carcinogenesis, and perforation of nasal septum, the intestines and stomach illness, leukocyte decline, the pulmonary lesion of similar asthma can be caused.Contact skin chromium compounds can cause allergy, and once the concentration of sensitization 3mg/kg is adequate to bring about anaphylactic reaction, can cause " chrome ulcer " that healing is the slowest.Chromium in water can accumulate in the skeleton of fish, and concentration is that 3.0 mg/ L i.e. have lethal effect to fresh-water fishes；Concentration is 0.01mg/L, and some aquatiles just can be made lethal, makes the self purification of water body be suppressed.If with the rural sewage disposal farm containing chromium, chromium is just in plant inner accumulated, and the Digestion of soil with organic matter is suppressed, and causes the agricultural underproduction.

The pollution of chromium is mainly caused by industry, such as plating, leather and printing and dyeing, the chromate waste water of electroplating industry occurs mainly with chromium plating, passivation matting and partial response strip operation, the such as chromed hardened technique of certain Electroplate Factory such as Fig. 1, chromium-plated part is through manual wiping, drip washing, chromium plating, reclaim, product is obtained after drip washing, a large amount of chromate waste waters are produced in second time drip washing operation, Cr VI and total chromium in chromate waste water are belonging to the strict pollutant controlling discharge of country, therefore waste electroplating liquor containing chromium fully must be administered, chromate waste water should be collected separately process, after hexavalent chrome reduction is trivalent chromium, can be with other heavy metal wastewater thereby mixed processing.The method processed at present mainly has sulphite reduction technique, ferrous sulfate-lime treatment technology etc., after using PH regulation, chromium reduction pretreatment, process through broken chromium, two-stage coagulation precipitation comprehensive wastewater again, its shortcoming is to produce the most difficult mud formed by chromium hydroxide precipitation without any exception, therefore, for a kind of effective treatment technology of chromate waste water exploitation and device, make sludge quantity reduce, be really achieved the reduction of recycling economy and running cost.

Summary of the invention

For defect or deficiency present in above-mentioned prior art, this utility model adopts the following technical scheme that, it is provided that a kind of technique is simple, operating cost is low, technology investment is little, produces the device that mud is few simultaneously.

The technical program is as follows, and a kind of continuous way chromate waste water processing means, including the electrolysis unit being sequentially communicated, elevator pump, ion interchange unit；

Regulating tank that electrolysis unit includes being sequentially communicated, electrolysis bath, stillpot, medial launder, also include that alkali liquid tank, alkali liquid tank are connected with stillpot inlet line；

The Filter column that ion interchange unit includes being sequentially communicated, acid male post, except chromium the moon post, the cloudy post of deacidification, also include that acid solution tank, acid solution tank connects with except chromium the moon post inlet line, also include that deionizing post, deionizing post connect with the moon post inlet line that deacidifies.

Further, also include that thickener, thickener connect with deionizing post.

Further, also including circulating slot, circulating slot post cloudy with deacidification connects.

As preferably, electrolysis unit also includes that acid tank, acid tank connect with electrolysis bath inlet line.

As preferably, electrolysis unit also includes that remove impurity grease removal tank, rust cleaning pond, remove impurity grease removal tank, rust cleaning pond are sequentially communicated with electrolysis bath.

As preferably, electrolysis unit also includes air accumulator, and air accumulator connects with electrolysis bath.

Further, electrolysis unit also includes sludge dewatering equipment, and sludge dewatering equipment connects with stillpot, regulating tank respectively.

As preferably, ion interchange unit also includes that regenerative agent tank one, regenerative agent tank one connect with acid male post.

As preferably, ion interchange unit also includes regenerative agent tank two, sweet-water tank, and regenerative agent tank two post cloudy with deacidification connects, and sweet-water tank is respectively communicated with regenerative agent tank two, the cloudy post of deacidification.

The technical program provides the benefit that: 1) can greatly reduce the generation amount of mud；

2) utilizing elevator pump, ion interchange unit utilizes gravity to flow, and saves the energy；

3) run continuously, there is no intermittently operated equipment, meet cleanly production requirement.

Accompanying drawing explanation

In order to be illustrated more clearly that the technical scheme in this utility model embodiment, in describing embodiment below, the required accompanying drawing used is briefly described.

Fig. 1 is the process chart that certain Electroplate Factory is zinc-plated；

Fig. 2 is a kind of continuous way chromate waste water processing means principle schematic.

Detailed description of the invention

For the ease of understanding this utility model, below with reference to relevant drawings, this utility model is described more fully.Accompanying drawing gives first-selected embodiment of the present utility model.But, this utility model can realize in many different forms, however it is not limited to the embodiment of institute's second speed herein.On the contrary, providing the purpose of these embodiments is to make the understanding to disclosure of the present utility model more thorough comprehensively.

It should be noted that be referred to as " being fixedly arranged on " another element when element, it can be directly on another element or can also there is element placed in the middle.When an element is considered as " connection " another element, and it can be directly to another element or may be simultaneously present centering elements.Term as used herein " vertical ", " level ", "left", "right" and similar statement are for illustrative purposes only.

Unless otherwise defined, all of technology used herein and scientific terminology are identical with belonging to the implication that those skilled in the art of the present utility model are generally understood that.It is intended merely to describe the purpose of specific embodiment at term used in the description of the present utility model herein, it is not intended that in limiting this utility model.Term as used herein " and/or " include the arbitrary and all of combination of one or more relevant Listed Items.

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described.

Certain galvanized wire technique is as shown in Figure 1, use degreasing degreasing, Ni Piao tri-road, pickling, Ni Piao tri-road, neutralization, zinc-plated, recovery, Ni Piao tri-road, go out the operations such as light, Ni Piao tri-road, passivation, Ni Piao tri-road, hot water wash, passivation procedure uses chromium passivating agent, thereafter Ni Piao tri-road produces chromate waste water, hot water wash operation produces chromate waste water, and these waste water need individual processing.

A kind of continuous way chromate waste water processing means as shown in Figure 2, in figure, numeral represents: 1, regulating tank；2, electrolysis bath；3, alkali liquid tank；4；Remove impurity grease removal tank；5, rust cleaning pond；6, air accumulator；7, stillpot；8, medial launder；9, elevator pump；10, Filter column；11, acid male post；12, acid solution tank；13, except chromium the moon post；14, deionizing post；15, the cloudy post of deacidification；16, circulating slot；17, acid tank；18, sludge dewatering equipment；19, regenerative agent tank one；20, regenerative agent tank two；21, thickener；22, sweet-water tank.

In the present embodiment, a kind of continuous way chromate waste water processing means, including the electrolysis unit being sequentially communicated, elevator pump 9, ion interchange unit, regulating tank 1 that electrolysis unit includes being sequentially communicated, electrolysis bath 2, stillpot 7, medial launder 8, also include alkali liquid tank 3, alkali liquid tank 3 is connected with stillpot 7 inlet line, is used for controlling being electrolysed out water ph value between 8～4, and the wastewater flow rate of process should be greater than equal to 5m3/h.

Electrolysis unit also includes that acid tank 17, described acid tank 17 connect with described electrolysis bath 2 inlet line, for adjusting the pH value of water inlet between 2～4.

Electrolysis unit also includes remove impurity grease removal tank 4, rust cleaning pond 5, and described remove impurity grease removal tank 4, rust cleaning pond 5 are sequentially communicated with described electrolysis bath 2, for iron filings before stuffing apparatus, carry out remove impurity, oil removing and processing of rust removing.In order to prevent iron filings from luming, timing it should be carried out air water combine recoil, therefore air accumulator 6 and water (tap water) are set, described air accumulator 6 connects with described electrolysis bath 2, backwashing water enters mudpan or regulating tank, in overhaul of the equipments or when stopping transport, the iron filings filler in electrolysis unit must keep not having with water logging, prevents air oxidation and or hardens；Electrolysis unit also includes sludge dewatering equipment 18, and described sludge dewatering equipment 18 connects with described stillpot 7, regulating tank 1 respectively, after a small amount of sludge dewatering, with plastic bag packaging, prevents from polluting surrounding because leaking, drip or being scattered.

nullIon exchange resin is used widely in electroplating wastewater processing，But ion exchange resin belongs to coarse pored structure，There is easily blocking to cause and return the problem washing regeneration difficulty，Simultaneously because resin absorption speed is slower，The investment of switching equipment will be increased in the wastewater treatment process of big flow，After the pretreatment of electrolysis unit，Chromate waste water elevator pump pumps into ion interchange unit to reach the standard of reuse or discharge，Gravity is relied on to flow in ion interchange unit，To save the energy，Ion interchange unit includes the Filter column 10 being sequentially communicated、Acid male post 11、Except chromium the moon post 13、The cloudy post 15 of deacidification，Also include acid solution tank 12，Described acid solution tank 12 connects with except chromium the moon post 13 inlet line，For controlling to enter the waste water pH value of cloudy post below 5，Also include deionizing post 14，Described deionizing post 14 post 15 inlet line cloudy with deacidification connects，The hexavalent chromium mass concentration of water inlet is no more than 200mg/L.

Described ion interchange unit also includes that regenerative agent tank 1, described regenerative agent tank 1 connect with acid male post 11, and industrial hydrochloric acid (HCl) selected by regenerative agent, and rinse water tap water, the end of a period pH value of rinse water controls between 2～3；Described ion interchange unit also includes regenerative agent tank 2 20, sweet-water tank 22, described regenerative agent tank 2 20 post 15 cloudy with described deacidification connects, described sweet-water tank 22 is respectively communicated with regenerative agent tank two, the cloudy post 15 of described deacidification, regenerative agent can be selected for industrial Caustic soda (NaOH), regenerated liquid demineralized water is prepared, the rinse water of cloudy post also uses demineralized water, and the end of a period pH value of rinse water controls between 8～10.

Washing water, the part containing hexavalent chromium during ion exchange resin regeneration return to regulating tank, process rear reuse up to standard containing soda acid and heavy metal ion part.

Device also includes that thickener 21, described thickener 21 connect with deionizing post 14；Also including circulating slot 16, described circulating slot 16 post 15 cloudy with deacidification connects.

This utility model, compared with the device of chemical precipitation method, can greatly reduce the generation amount of mud, and only electrolysis link produces a small amount of mud, can clear up once by some months；Utilize elevator pump, the Filter column of waste water pump to ion interchange unit and utilize gravity to flow, the energy can be saved；Running continuously, middle waste water is collected automatically, does not has intermittently operated equipment, meets cleanly production requirement.

It should finally be noted above example is only the more representational example of this utility model.Obviously this utility model is not limited to above-described embodiment, it is also possible to have many deformation.Every any simple modification, equivalent variations and modification made above example according to technical spirit of the present utility model, is all considered as belonging to protection domain of the present utility model.

Claims (9)

1. a continuous way chromate waste water processing means, it is characterised in that the electrolysis unit that includes being sequentially communicated, elevator pump (9), ion interchange unit；Regulating tank (1) that described electrolysis unit includes being sequentially communicated, electrolysis bath (2), stillpot (7), medial launder (8), also include that alkali liquid tank (3), described alkali liquid tank (3) are connected with stillpot (7) inlet line；

The Filter column (10) that described ion interchange unit includes being sequentially communicated, acid male post (11), except chromium the moon post (13), the cloudy post (15) of deacidification, also include acid solution tank (12), described acid solution tank (12) connects with except chromium the moon post (13) inlet line, also including deionizing post (14), described deionizing post (14) post (15) inlet line cloudy with deacidification connects.

A kind of continuous way chromate waste water processing means the most according to claim 1, it is characterised in that also include that thickener (21), described thickener (21) connect with deionizing post (14).

A kind of continuous way chromate waste water processing means the most according to claim 1, it is characterised in that also include circulating slot (16), described circulating slot (16) post (15) cloudy with deacidification connects.

4. according to a kind of continuous way chromate waste water processing means described in claim 1-3 any one, it is characterised in that described electrolysis unit also includes that acid tank (17), described acid tank (17) connect with described electrolysis bath (2) inlet line.

5. according to a kind of continuous way chromate waste water processing means described in claim 1-3 any one, it is characterized in that, described electrolysis unit also includes that remove impurity grease removal tank (4), rust cleaning pond (5), described remove impurity grease removal tank (4), rust cleaning pond (5) are sequentially communicated with described electrolysis bath (2).

6. according to a kind of continuous way chromate waste water processing means described in claim 1-3 any one, its feature exists, and described electrolysis unit also includes that air accumulator (6), described air accumulator (6) connect with described electrolysis bath (2).

7. according to a kind of continuous way chromate waste water processing means described in claim 1-3 any one, its feature exists, and described ion interchange unit also includes that regenerative agent tank one (19), described regenerative agent tank one (19) connect with acid male post (11).

8. according to a kind of continuous way chromate waste water processing means described in claim 1-3 any one, its feature exists, described ion interchange unit also includes regenerative agent tank two (20), sweet-water tank (22), described regenerative agent tank two (20) post (15) cloudy with described deacidification connects, and described sweet-water tank (22) is respectively communicated with regenerative agent tank two, the cloudy post (15) of described deacidification.

A kind of continuous way chromate waste water processing means the most according to claim 1, its feature exists, and described electrolysis unit also includes sludge dewatering equipment (18), and described sludge dewatering equipment (18) connects with described stillpot (7), regulating tank (1) respectively.