CN203904114U - Acid-pickling iron-containing waste water treatment device - Google Patents
Acid-pickling iron-containing waste water treatment device Download PDFInfo
- Publication number
- CN203904114U CN203904114U CN201420342081.9U CN201420342081U CN203904114U CN 203904114 U CN203904114 U CN 203904114U CN 201420342081 U CN201420342081 U CN 201420342081U CN 203904114 U CN203904114 U CN 203904114U
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- reaction pond
- aerated reaction
- tank
- neutralizing
- water inlet
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Abstract
The utility model discloses an acid-pickling iron-containing waste water treatment device. The treatment device comprises an oil-removal regulating tank, a neutralizing aeration reaction tank, an accurate pH regulation neutralizing reaction tank and a primary settling tank which are connected sequentially, wherein the primary settling tank is simultaneously connected with a filter pressing drying tank and a secondary settling tank respectively; an aeration device is laid at the bottom of the neutralizing aeration reaction tank, a baffle is arranged at the bottom and divides the neutralizing aeration reaction tank into a gravel reaction zone close to a water inlet and a finely broken stone accumulation zone close to a water outlet; and a suspension conveyor is arranged above the neutralizing aeration reaction tank and a plurality of feeding baskets containing limestone are suspended on the suspension conveyor. According to the treatment device, limestone blocks are conveyed into the neutralizing aeration reaction tank in batches, so that the reaction is more thorough, and less settling residue is generated.
Description
Technical field
The utility model belongs to pickling waste waters processing technology field, is specifically related to a kind of pickling containing the treatment unit of iron waste water.
Background technology
In the production process of steel product, conventionally need to the surface of steel product, carry out cleanup acid treatment with hydrochloric acid, to remove the oxide compound on steel product surface.With after chlorohydric acid pickling steel product, produce a large amount of pickling waste waterss, these pickling waste waterss can not directly discharge, otherwise pollute the environment, must be by processing, could discharge after meeting discharging standards.
The usual method of these iron content pickling wastewater treatments has neutralisation, crystallization process, thermal degradation method, ion exchange method etc.It is neutralisation that current processing pickling waste waters adopts maximum methods.Common neutralisation processing technological flow is: equalizing tank, dosing neutralization reaction, precipitation process, filtration treatment, sludge treatment etc.Neutralisation is simple, but there is the problem that sludge quantity is difficult too greatly, processing cost is high, economy is very poor, major cause is that the thing that feeds intake because neutralization reaction is common is lime powder or milk of lime, if with lime powder or lime slurry neutralization, due to uncontrollable, feed intake and level of response, can cause lime powder or milk of lime to deposit in a large number, cause the quantity of slag too large, and sediment cannot be recycled, and not only cause the wasting of resources, more increased sludge treatment cost.
Adopt Wingdale as the thing that feeds intake, carry out neutralization reaction, can effectively reduce the generation of mud, what but prior art adopted is directly in pickling waste waters, to add large quantities of lime stone, in this kind of method, the chemical reaction of Wingdale and pickling waste waters easily causes the inadequate situation of reaction to occur because of the accumulation of Wingdale, and sediment is still a lot.
Utility model content
The above-mentioned shortcoming existing for prior art, it is a kind of for the treatment unit containing iron waste water after chlorohydric acid pickling that the purpose of this utility model is to provide, and controls the input amount of Wingdale, makes Wingdale and pickling waste waters reaction more complete.
To achieve these goals, the technical solution adopted in the utility model is:
Pickling is containing the treatment unit of iron waste water, comprise connect successively oil removal equalizing tank, in and aerated reaction pond, accurate adjustment pH neutralization reaction pond and primary sedimentation basin, primary sedimentation basin connects respectively press filtration mummifying pool and secondary sedimentation basins simultaneously;
Aerating apparatus is laid in described and aerated reaction pond bottom, in bottom, baffle plate is set simultaneously, by and aerated reaction pond be divided near the rubble reaction zone of water inlet with near the fine stone accumulation area of water outlet; In and aerated reaction pond top be provided with overhead chain conveyer, on overhead chain conveyer, be hung with some splendid attire Wingdales to charging basket.
Preferably, in and the water inlet end in aerated reaction pond be provided with floating ball liquid level control valve.
Preferably, in and the water outlet end in aerated reaction pond be provided with filter screen.
Preferably, described aerating apparatus is the compressed air pipe that is snakelike sigmoid, bottom, during compressed air pipe is fixed on by fixation clip and aerated reaction pond; On compressed air pipe, be evenly distributed with solarization air cap.
Preferably, at the bottom of in fine stone accumulation area place and aerated reaction pond is inclination pond, water inlet end position is higher than water outlet end position, and inclination angle is 10 °～20 °.
Preferably, the distance of baffle plate and water inlet end pool wall is greater than one to the width of charging basket.
Owing to having adopted technique scheme, the beneficial effects of the utility model are:
1) mode first by overhead chain conveyer, Wingdale being added step by step, make the acidic solution reaction in Wingdale and waste water more abundant, can avoid excessive calcium carbonate impurity to sneak in ferric hydroxide precipitate, greatly improve the purity of final product ironic hydroxide; And reduced the accumulation of Wingdale sediment, effectively saved resource, reduced the processing cost of mud simultaneously.
2) Wingdale moves to strong acid district to charging basket from the weak weak acid district of acidity, and sails against the current, and by counter-current principle, makes Wingdale more abundant with reacting of pickling waste waters.
Accompanying drawing explanation
Fig. 1 is treatment unit schematic block diagram of the present utility model.
Fig. 2 be of the present utility model in and aerated reaction pond schematic diagram.
Fig. 3 is aerating apparatus schematic diagram of the present utility model.
Mark in figure: 1-oil removal equalizing tank, in 2-and aerated reaction pond, 21-overhead chain conveyer, 22-is to charging basket, 23-water inlet, 231-floating ball liquid level control valve, 24-water outlet, 241-filter screen, 25-aerating apparatus, 251-compressed air pipe, 252-fixation clip, 253-solarization air cap, 26-baffle plate, 2a-rubble reaction zone, 2b-fine stone accumulation area, 3-accurate adjustment pH neutralization reaction pond, 4-primary sedimentation basin, 5-press filtration mummifying pool, 6-secondary sedimentation basins.
Embodiment
Below in conjunction with accompanying drawing, the enforcement for the treatment of unit of the present utility model is illustrated:
With reference to Fig. 1, pickling of the present utility model is containing the treatment unit of iron waste water, comprise connect successively oil removal equalizing tank 1, in and aerated reaction pond 2, accurate adjustment pH neutralization reaction pond 3 and primary sedimentation basin 4, primary sedimentation basin 4 connects respectively press filtration mummifying pool 5 and secondary sedimentation basins 6 simultaneously.
With reference to Fig. 2, in and 2 bottoms, aerated reaction pond lay aerating apparatuss 25, baffle plate 26 is set in bottom simultaneously, by and aerated reaction pond 2 be divided near the rubble reaction zone 2a of water inlet 23 with near the fine stone accumulation area 2b of water outlet 24.The highly about 300mm of baffle plate 26, baffle plate 26 positional distance water inlet 23 end pool walls give charging basket 22 slightly wide than one, and this design is that the turbulent flow forming for fear of water inlet 23 is involved in fine stone accumulation area 2b by tiny Wingdale.
In fine stone accumulation area 2b place and aerated reaction pond 2 is at the bottom of inclination pond, water inlet 23 end positions are higher than water outlet 24 end positions, inclination angle is 10 °～20 °, and being convenient to ironic hydroxide suspension liquid can flow to water outlet 24 ends and be unlikely to produce alluvial in inlet end from water inlet 23 ends.Produce after for some time, at fine stone accumulation area, 2b has the Wingdale that some are scattered, and due to the weak acid district in water outlet 24 ends, Wingdale speed of response is extremely slow, as piled up many and should carry out pond operation clearly, the Wingdale that is scattered of water side is drawn clearly to the rubble reaction zone 2a of water-in 23 ends.Water outlet 24 drive water side pool wall from bottom about 500mm place, and the filter screen 241 that aperture is 5mm is set, avoid the limestone particle being scattered to flow out with ironic hydroxide suspension liquid.
In and water inlet 23 ends in aerated reaction pond 2 be provided with floating ball liquid level control valve 231, in pond, during liquid level step-down, automatically open switch, enlargement discharge; When liquid level meets the requirements, by floating ball liquid level control valve 231, automatically close water inlet 23, play a kind of effect of automatic adjusting.
In and 2 tops, aerated reaction pond be provided with the gravity system being formed to charging basket 22 and overhead chain conveyer 21 by lime.Giving charging basket 22 is common cubes storage cage, and size specification is definite according to unit time treatment capacity, and basket is selected resistance to acid attack material, basket grid is 10-30mm, basket bottom arranges a switching arrangement, while arriving water inlet 23 end to charging basket 22, rubble in basket is poured over to rubble reaction zone 2a.Overhead chain conveyer 21 is for giving the automatic transmission of charging basket 22, and overhead chain conveyer 21 adopts circular trackways, a siding track in and 2 tops, aerated reaction pond, opposite side track, can artificial loading in a Wingdale raw ore dress basket feeding area.Utilize overhead chain conveyer 21, by in the sending into of one basket one basket, Wingdale and aerated reaction pond 2, and can enter from water outlet 24 one end, in water inlet 23 one end, pour Wingdale into, Wingdale submerges in pond in mobile process, the counter-current principle adopting, makes the reaction of Wingdale and pickling waste waters more abundant.
With reference to Fig. 2, Fig. 3, aerating apparatus 25 is for being the compressed air pipe 251 of snakelike sigmoid, and compressed air pipe 251 is tube spacing 100-150mm back and forth, in the size basis of caliber, sets with the size in aerated reaction pond 2.During compressed air pipe 251 is fixed on by fixation clip 252 and 2 bottoms, aerated reaction pond; On compressed air pipe 251, be evenly distributed with solarization air cap 253.Aerating apparatus 25 of the present utility model not only provides oxygen for carrying out oxidizing reaction, also utilizes the pressurized air of large flow to form turbulent flow, and ferrous hydroxide and ferric hydroxide precipitate that disturbance generates, avoid sediment.Directly boring on pressurized air coil pipe, solarization air cap 253 apertures are 0.5mm, solarization air cap 253 spacing 50mm.Large because of solarization air cap 253 apertures, during aeration, increased turbulent disturbance dynamics, saved the cost of purchasing aeration head.Aerating apparatus 25 can directly adopt pressurized air that the existing pressurized air central gas supply of factory station provides as source of the gas, compressed-air actuated operate pressure is 0.4～0.8MPa, because large-scale compressed air station is lower than the unit air feed cost of independent air compressor machine, saved running cost.
In and the main chemical reactions formula of the 2 li of generations in aerated reaction pond be:
①CaCO
3+2H
+→CO
2↑+H
2O+Ca
2+；
②Fe
2++2OH
-→Fe(OH)
2↓；
③4Fe(OH)
2+2H
2O+O
2→4Fe(OH)
3↓；
④4Fe
2++10H
2O+O
2→4Fe(OH)
3↓+8H
+；
Above chemical reaction be in and the main chemical reactions that occurs of aerated reaction pond 2, the pickling waste waters of sending into from water inlet 23, mainly comprise Fe
2+and H
+, add Wingdale (CaCO
3) after, pass through Fe
2+and CO
3 2-hydrolysis, there is chemical reaction 1. and 2., then chemical reaction occurs 3. after aerating apparatus 25 constantly pass into air, generate with Fe (OH)
3the suspension liquid of precipitation, is also attended by chemical reaction generation 4., the H of generation in the while and in aerated reaction pond 2
+return chemical reaction 1. in and Wingdale (CaCO
3) reaction.So circulation, by constantly adding Wingdale (CaCO
3) can constantly consume Fe in pickling waste waters
2+and H
+, finally from water outlet 24, discharge Fe (OH)
3suspension liquid, and be mainly CaCl
2solution.
With reference to Fig. 1, Fig. 2, illustrates the enforcement of the treatment process for the treatment of unit of the present utility model, and concrete steps are as follows:
(A) acid waste water of iron content is standing in oil removal equalizing tank 1, oil slick and scum silica frost in isolation, removing water, in pickling waste waters, concentration of hydrochloric acid is 2%～4%.
(B) open water inlet 23 valves toward in and aerated reaction pond 2 injection pickling waste waterss, and open aerating apparatus 25 and carry out aeration.The Wingdale (or other calcium carbonate raw ores) that particle diameter is approximately to 100～500mm be placed in hang carriage in charging basket 22, successively from and aerated reaction pond 2 near water outlet 24 ends, immerse in waste water, under the effect of overhead chain conveyer 21, along flow reversal, advance to charging basket 22.For avoiding ironic hydroxide deposition, as long as leave suspension liquid in reaction tank, aeration just can not stop.
When near water inlet 23 end, open to charging basket 22 bottom switch, the Wingdale in charging basket 22 is poured over to the rubble reaction zone 2a of water inlet 23 ends, along the reinforced place circulation of overhead chain conveyer 21 auto-returned Wingdales, load to charging basket 22.
Floating ball liquid level control valve 231 at water inlet 23 can be controlled flooding velocity automatically.And can control level of response by adjusting the water flow at the mouth of a river 24, and with wide pH value test paper, check, make the pH value of water outlet 24 place's suspension liquids be about 2.
(C) from and the ironic hydroxide suspension liquid that flows out of aerated reaction pond 2 introduce accurate adjustment pH neutralization reaction pond 3, add sodium hydroxide solution, and continue to stir with stirrer, pH value is adjusted to 6～9.
(D) again ironic hydroxide suspension liquid is sent into primary sedimentation basin 4, by unhurried current, standing, make ironic hydroxide form natural sedimentation.
(E) supernatant liquid of primary sedimentation basin 4 is sent into secondary sedimentation basins 6, then through unhurried current, standing, ironic hydroxide is further precipitated, the supernatant liquid rear direct discharge up to standard flowing slowly after standing; The lower floor's ferric hydroxide precipitate flowing slowly in secondary sedimentation basins 6 after standing is sent back in primary sedimentation basin 4 by water pump.
(F) the lower floor's ferric hydroxide precipitate in primary sedimentation basin 4 is sent into press filtration mummifying pool 5, by plate basket pressure filter, carries out press filtration, and the ironic hydroxide after press filtration is through natural mummification, recovery.Ironic hydroxide pack after mummification, can, directly as the starting material of manufacturing red iron oxide, also can send steel mill to smelt or make other purposes.By after ferric hydroxide precipitate press filtration drying and other treatment, the filtrate of generation and draining are sent back in primary sedimentation basin 4 by water pump.
In the utility model, the Wingdale that fine stone accumulation area 2b is scattered is through after a period of time, can clear up and enter rubble reaction zone 2a fully reaction again, but Wingdale raw ore itself contains a small amount of silicate impurity, because of its density larger, the overwhelming majority can not flow out with ironic hydroxide suspension liquid, has guaranteed the purity of ironic hydroxide product.So final waste residue of the present utility model is silicate, quality is about the 1-3% of Wingdale raw ore, and because this waste residue is not containing the material that exceeds standard of legal emission standard, environmental sound, can, for cultivating flowers and plants, reach the zero release of pollutent.
Claims (6)
1. a pickling is containing the treatment unit of iron waste water, comprise connect successively oil removal equalizing tank (1), in and aerated reaction pond (2), accurate adjustment pH neutralization reaction pond (3) and primary sedimentation basin (4), primary sedimentation basin (4) connects respectively press filtration mummifying pool (5) and secondary sedimentation basins (6) simultaneously, it is characterized in that
Aerating apparatus (25) is laid in bottom, in described and aerated reaction pond (2), baffle plate (26) is set in bottom simultaneously, will in and aerated reaction pond (2) be divided near the rubble reaction zone (2a) of water inlet (23) with near the fine stone accumulation area (2b) of water outlet (24); In and aerated reaction pond (2) top be provided with overhead chain conveyer (21), on overhead chain conveyer (21), be hung with some splendid attire Wingdales to charging basket (22).
2. treatment unit according to claim 1, is characterized in that, in and water inlet (23) end in aerated reaction pond (2) be provided with floating ball liquid level control valve (231).
3. treatment unit according to claim 1, is characterized in that, in and water outlet (24) end in aerated reaction pond (2) be provided with filter screen (241).
4. treatment unit according to claim 1, it is characterized in that, described aerating apparatus (25) is the compressed air pipe (251) that is snakelike sigmoid, bottom, during compressed air pipe (251) is fixed on by fixation clip (252) and aerated reaction pond (2); On compressed air pipe (251), be evenly distributed with solarization air cap (253).
5. treatment unit according to claim 1, it is characterized in that, in fine stone accumulation area (2b) place and aerated reaction pond (2) is at the bottom of inclination pond, and water inlet (23) end position is higher than water outlet (24) end position, and inclination angle is 10 °～20 °.
6. treatment unit according to claim 1, is characterized in that, baffle plate (26) is greater than one to the width of charging basket (22) with the distance of water inlet (23) end pool wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420342081.9U CN203904114U (en) | 2014-06-24 | 2014-06-24 | Acid-pickling iron-containing waste water treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420342081.9U CN203904114U (en) | 2014-06-24 | 2014-06-24 | Acid-pickling iron-containing waste water treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203904114U true CN203904114U (en) | 2014-10-29 |
Family
ID=51778404
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420342081.9U Withdrawn - After Issue CN203904114U (en) | 2014-06-24 | 2014-06-24 | Acid-pickling iron-containing waste water treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203904114U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016523A (en) * | 2014-06-24 | 2014-09-03 | 重庆华绿环保科技发展有限责任公司 | Treatment device and treatment method of acid washing iron-containing wastewater |
| CN107381962A (en) * | 2017-08-25 | 2017-11-24 | 四川奥恒环保科技有限公司 | Efficient domestic sewage treatment device |
| CN114477711A (en) * | 2022-03-03 | 2022-05-13 | 中铁五局集团第一工程有限责任公司 | Sludge treatment system |
-
2014
- 2014-06-24 CN CN201420342081.9U patent/CN203904114U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016523A (en) * | 2014-06-24 | 2014-09-03 | 重庆华绿环保科技发展有限责任公司 | Treatment device and treatment method of acid washing iron-containing wastewater |
| CN104016523B (en) * | 2014-06-24 | 2015-10-21 | 重庆华绿环保科技发展有限责任公司 | A kind for the treatment of unit of pickling iron content waste water and treatment process |
| CN107381962A (en) * | 2017-08-25 | 2017-11-24 | 四川奥恒环保科技有限公司 | Efficient domestic sewage treatment device |
| CN114477711A (en) * | 2022-03-03 | 2022-05-13 | 中铁五局集团第一工程有限责任公司 | Sludge treatment system |
| CN114477711B (en) * | 2022-03-03 | 2023-06-30 | 中铁五局集团第一工程有限责任公司 | Sludge treatment system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20141029 Effective date of abandoning: 20151021 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |