CN204569446U - A kind of industrial effluent treatment unit - Google Patents
A kind of industrial effluent treatment unit Download PDFInfo
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- CN204569446U CN204569446U CN201420822080.4U CN201420822080U CN204569446U CN 204569446 U CN204569446 U CN 204569446U CN 201420822080 U CN201420822080 U CN 201420822080U CN 204569446 U CN204569446 U CN 204569446U
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Abstract
A kind of industrial effluent treatment unit, comprising: a neutralization tank, and flyash acid system is produced removal of impurities waste liquid that aluminum oxide produces reacts at described neutralization tank and lime or milk of lime; A solid-liquid separation unit, carries out solid-liquid separation to the removal of impurities waste liquid from neutralization tank, discharges solid slag; A spray roasting unit, carries out spray roasting to the liquid material removing solid slag from solid-liquid separation unit, the calcium chloride product carrying device obtained; A smoke absorption unit, makes the flue gas from spray roasting unit absorb outer row after process through described smoke absorption unit.This device is made up of the unit equipment of several maturation, and flow process is short, and construction cost and running cost are all lower, can realize the recycling treatment of industrial effluent.
Description
Technical field
The application relates to industrial effluent recycling field, more particularly, is the removal of impurities liquid waste treating apparatus that flyash acid system produces in alumina process.
Background technology
Produce at flyash acid system in the process of aluminum oxide, flyash and hydrochloric acid are prepared burden by a certain percentage, to utilize in pickling equipment stripping flyash the metal oxides such as aluminium, iron, calcium, magnesium, gallium, obtain impure liquor alumini chloridi under certain temperature.The waste water that liquor alumini chloridi produces in scavenging process and in gallium leaching process is called removal of impurities waste liquid.
In removal of impurities waste liquid, primary metal ion content is: iron ion 114 ~ 170g/l, aluminum ion 12 ~ 27g/l, also containing a small amount of calcium, magnesium ion etc., is muriate, and usually also containing free hydrochloric acid, concentration is 3 quality %.
Prior art is that removal of impurities waste liquid is directly carried out spray roasting, obtains elementary iron, aluminium blended solid, does general solid waste and stores up.After flue gas use water absorbs, the waste water produced adds alkali neutralization, and Treated sewage reusing after membrane concentration, haline water is arranged outward.
In technique, Problems existing has two aspects: on the one hand in waste liquid ferric ion and hydrochloric acid serious to equipment corrosion; Hydro-oxidation sodium neutralization on the other hand, costly.If select additive method process by after waste liquid separating-purifying, produce high-purity iron oxide red and water purification agent, considerable benefit, but investment cost is larger.
Therefore, for solving Problems existing in existing process for treating waste liquor, need a kind of investment of research and development low and eco-friendly liquid waste disposal scheme, to realize the recycling treatment that flyash acid system produces the removal of impurities waste liquid that aluminum oxide produces.
Summary of the invention
The purpose of this utility model is: provide a kind of industrial effluent treatment unit, and the removal of impurities waste liquid that flyash acid system production aluminum oxide is produced is recycled process in both economical and eco-friendly mode.
Industrial effluent treatment unit provided by the utility model comprises:
A neutralization tank, makes flyash acid system produce the removal of impurities waste liquid that produces of aluminum oxide and reacts at described neutralization tank and lime or milk of lime;
A solid-liquid separation unit, carries out solid-liquid separation to the removal of impurities waste liquid from neutralization tank, discharges solid slag;
A spray roasting unit, carries out spray roasting to the liquid material removing solid slag from solid-liquid separation unit, the calcium chloride product carrying device obtained;
A smoke absorption unit, makes the flue gas from spray roasting unit absorb outer row after process through described smoke absorption unit.
In the industrial effluent treatment unit that the application provides, any one in the solid-liquid separation unit that described solid-liquid separation unit can select this area to commonly use, preferred pressure filter.
In the industrial effluent treatment unit that the application provides, any one in the spray roasting equipment that described spray roasting unit can select this area to commonly use, is preferably fluidized bed with spraying drying-granulating machine.
In the industrial effluent treatment unit that the application provides, any one in the flue gas processing device that described smoke absorption unit can select this area to commonly use, such as, described smoke absorption unit comprises the spray column, two-level absorption tower and the tail gas absorber that set gradually.
In the industrial effluent treatment unit that the application provides, be provided with cooling unit, for cooling calcium chloride product in the downstream of described spray roasting unit.
Compared with prior art, the beneficial effect major embodiment of industrial effluent treatment unit that provides of the application is in the following areas:
The industrial effluent treatment unit of the application is made up of the unit equipment of several maturation, and flow process is short, and construction cost and running cost are all lower; Removal of impurities waste liquid in flyash acid system production alumina process, by not only greatly reducing the discharge of the three wastes after this device process, can also generate the calcium chloride product meeting industry standard.
Accompanying drawing explanation
Fig. 1 be the application a kind of embodiment schematic diagram of industrial effluent treatment unit is provided.
Embodiment
Further illustrate below in conjunction with accompanying drawing the industrial effluent treatment unit that the application provides, but therefore the application is not subject to any restriction.
As shown in Figure 1, the industrial effluent treatment unit that the application provides comprises: neutralization tank 1, makes flyash acid system produce the removal of impurities waste liquid that produces of aluminum oxide and reacts at this neutralization tank and lime or milk of lime; Solid-liquid separation unit 2, carries out solid-liquid separation to the removal of impurities waste liquid from neutralization tank, discharges solid slag; Spray roasting unit 3, carries out spray roasting granulation to the liquid material being stripped of solid slag from solid-liquid separation unit 2, the calcium chloride product carrying device obtained; Smoke absorption unit 4, makes the flue gas from spray roasting unit absorb outer row after process through described smoke absorption unit.
The industrial effluent treatment unit that the application provides works in such a way: flyash acid system is produced the removal of impurities waste liquid generated in alumina process and first introduced neutralization tank 1, add lime or milk of lime neutralizes, control ph 6-7, ageing 2-3 hour, then waste liquid is delivered to solid-liquid separation unit 2 and carries out solid-liquid separation, make iron, the impurity such as aluminium are removed completely from waste liquid, the solid slag obtained is stored up as first iron ore or general solid waste, the filtrate obtained delivers to spray roasting unit 3, obtained calcium chloride product after spray roasting granulation, the flue gas produced is delivered to smoke absorption unit 4 and is carried out absorption process, the filter cake washing water of fresh water or solid-liquid separation unit is adopted to contact with flue gas adverse current in spray column and follow-up smoke absorption tower, flue-gas temperature is reduced, the water vapor condensation carried secretly in flue gas gets off, make Ca simultaneously
2+, Cl
-be recovered etc. being dissolved in absorption liquid.As smoke absorption unit CaCl in the absorption liquid that obtains
2concentration is higher, such as, close to 16 quality %, can return the part of spray roasting unit as charging, to reclaim CaCl
2product.As smoke absorption unit CaCl in the absorption liquid that obtains
2concentration is lower, as a part for neutralization tank charging after can mixing with unslaked lime.
Embodiment 1
By 1m
3removal of impurities waste liquid is placed in neutralization tank, the 0.3 ton of calcium hydroxide neutralizing treatment added, control pH value is 6-7, ageing 2-3 hour, is washed by Filter Press, completely except the impurity such as de-iron, aluminium, solid slag as first iron ore or generally solid waste store up.In the filtrate obtained, the concentration of calcium chloride is about 16 quality %, its temperature about 80 DEG C, and enter the roasting of fluidized bed with spraying drying-granulating machine, temperature controls at 260-300 DEG C, generates 0.5 ton of calcium chloride product.
Chemically examine by analysis, in products obtained therefrom, the content of calcium chloride is 92 quality %, and magnesium and alkali metal chloride (NaCl meter) content are 3 quality %, can reach rower requirement.
Embodiment 2
By 1m
3removal of impurities waste liquid is placed in neutralization tank, adds 0.32 ton of calcium hydroxide neutralizing treatment, control pH value is 6-7, ageing 2-3 hour, is washed by Filter Press, completely except the impurity such as de-iron, aluminium, solid slag as first iron ore or generally solid waste store up.In gained filtrate, calcium chloride concentration is 20 quality %, and its temperature is 82 DEG C, and enter the roasting of fluidized bed with spraying drying-granulating machine, temperature controls at 260-300 DEG C, generates 0.5 ton of calcium chloride product.
Chemically examine by analysis, in product, the content of calcium chloride is 91.5 quality %, and magnesium and alkali metal chloride (NaCl meter) content are 3.5 quality %, can meet rower requirement.
Calcium chloride product rower HG/T2327-92 is in table 1:
Table 1
Claims (5)
1. an industrial effluent treatment unit, is characterized in that, this device comprises:
A neutralization tank, makes flyash acid system produce the removal of impurities waste liquid that produces of aluminum oxide and reacts at described neutralization tank and lime or milk of lime;
A solid-liquid separation unit, carries out solid-liquid separation to the removal of impurities waste liquid from neutralization tank, discharges solid slag;
A spray roasting unit, carries out spray roasting to the liquid material removing solid slag from solid-liquid separation unit, the calcium chloride product carrying device obtained;
A smoke absorption unit, makes the flue gas from spray roasting unit absorb outer row after process through described smoke absorption unit.
2. industrial effluent treatment unit according to claim 1, is characterized in that, described solid-liquid separation unit selects pressure filter.
3. industrial effluent treatment unit according to claim 2, is characterized in that, described spray roasting unit selects fluidized bed with spraying drying-granulating machine.
4. industrial effluent treatment unit according to claim 3, is characterized in that, described smoke absorption unit comprises the spray column, two-level absorption tower and the tail gas absorber that set gradually.
5. the industrial effluent treatment unit according to claim 1 or 4, is characterized in that, is provided with cooling unit, for cooling calcium chloride product in the downstream of described spray roasting unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420822080.4U CN204569446U (en) | 2014-12-22 | 2014-12-22 | A kind of industrial effluent treatment unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420822080.4U CN204569446U (en) | 2014-12-22 | 2014-12-22 | A kind of industrial effluent treatment unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204569446U true CN204569446U (en) | 2015-08-19 |
Family
ID=53862116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420822080.4U Active CN204569446U (en) | 2014-12-22 | 2014-12-22 | A kind of industrial effluent treatment unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204569446U (en) |
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2014
- 2014-12-22 CN CN201420822080.4U patent/CN204569446U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Chen Dong Inventor after: Wang Hongbin Inventor after: Xu Jing Inventor after: Hu Hongxia Inventor after: Ji Xueliang Inventor after: Yang Lei Inventor after: Guo Zhaohua Inventor after: Zheng Haifeng Inventor after: Song Litao Inventor after: Liu Darui Inventor before: Guo Zhaohua |
|
| CB03 | Change of inventor or designer information |