CN105645682A - Steel hydrochloric acid pickling wastewater treatment device - Google Patents
Steel hydrochloric acid pickling wastewater treatment device Download PDFInfo
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- CN105645682A CN105645682A CN201610015863.5A CN201610015863A CN105645682A CN 105645682 A CN105645682 A CN 105645682A CN 201610015863 A CN201610015863 A CN 201610015863A CN 105645682 A CN105645682 A CN 105645682A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention relates to a steel hydrochloric acid pickling wastewater treatment device which comprises a negative pressure evaporator, a steam condenser, a gas absorption tank, an aeration oxidation precipitation tank, a regulating tank and a flow-deflection aeration filter tank, wherein the negative pressure evaporator comprises a negative pressure evaporator water inlet pipe, a negative pressure evaporator water outlet pipe, a heating and pressure regulation device and a gas outlet pipe; the steam condenser comprises a steam inlet, a hydrochloric acid receiving tank, a cooling liquid inlet, a cooling liquid outlet and a steam outlet; a hydrochloric acid gas absorbent is arranged in the gas absorption tank; the gas absorption tank is provided with an upper cover; the upper cover of the gas absorption tank is in a conical structure; the top end of the conical structure is provided with a gas collection pipe; the aeration oxidation precipitation tank comprises an aeration mixing region and a precipitation range; the bottom of the aeration mixing region is provided with an aeration tray; an aeration oxidation precipitation tank water distribution branch pipe is arranged above the aeration tray; the middle upper part of the flow-deflection aeration filter tank is cylindrical, and the lower part is a conical structure; and the flow-deflection aeration filter tank comprises a downstream region, an upstream region and a sludge region.
Description
Technical field
The present invention relates to technical field of waste water processing, be specifically related to a kind of steel chlorohydric acid pickling wastewater treatment equipment.
Background technology
Pickling is a kind of method of cleaning metal surface, is also the necessary process of steel production and processing, its objective is to remove the oxide of metal surface. In acid cleaning process, acid cleaner contacts with metal surface and reacts, and along with the increase of the reduction of hydrogen ion concentration and concentration of metal ions in acid solution, the pickling efficiency of acid solution also constantly reduces, and becomes the pickle liquor needing outer row. For common iron, the pickling effect of hydrochloric acid relatively sulphuric acid is more notable, and the release effect of chlorohydric acid pickling makes base iron loss less, and therefore hydrochloric acid is increasingly becoming the main flow abluent in steel cleaning.
Containing substantial amounts of hydrion with Fe in steel hydrochloric acid pickling waste liquor2+It is main metal ion, if directly discharging the ecological environment that will have a strong impact on water body and soil, poisoning animals and plants around, causing soil property calcification, destroying soil layer construction; If people and animals' water that by mistake drink acidity is bigger, gently then cause gastroenteritis, heavy then digestive system of burning; If taking in too much heavy metal ion, also can cause people and animals' metal poisoning, finally human health being caused serious harm. In addition, pickling waste waters is high because of its acidity, the biological self reproducing in biological treatment of waste water system is also had certain impact, also can endanger the water conservancy project structure such as sewer pipe and armored concrete, cause burn into destruction etc. Meanwhile, chlorohydric acid pickling waste water acidity is high, and iron salt content is big, if directly discharge is also the waste of a kind of resource.
In medium-sized and small enterprises, the traditional processing mode of chlorohydric acid pickling waste water is that outward transport trust processes and adds alkali neutralisation treatment. Wherein adding alkali neutralisation treatment uses carbide slag or lime slaking product to react with the acid in pickle liquor, metal ion, produces Fe (OH)2Both are processed after solid-liquid separation by precipitation respectively. This technique includes the processes such as neutralization, flocculation, precipitation, filtration, treatment effect is general, needs add a large amount of alkali and flocculant, there is the problems such as flow process is tediously long, effluent quality instability up to standard, floor space are big, the a large amount of body refuse dehydrations difficulty produced, is therefore eliminated gradually in practical application process. And large enterprise is generally adopted high-temperature roasting method, it is advantageous that the response rate of regenerated acid and iron salt is high, but invest huge, equipment requirements is high, and operating condition is strict, runs and maintenance cost is also high, and the large-scale promotion of this technique is limited by some extent.
Summary of the invention
The technical problem to be solved in the present invention is: in order to solve the difficult problem in above-mentioned steel chlorohydric acid pickling wastewater treatment, and the present invention provides a kind of steel chlorohydric acid pickling wastewater treatment equipment.
The technical solution adopted for the present invention to solve the technical problems is: a kind of steel chlorohydric acid pickling wastewater treatment equipment, including vacuum evaporator, steam condenser, gas absorption cell, aerating oxidation sedimentation tank, regulating reservoir and baffling aerating filter.
Described vacuum evaporator includes vacuum evaporator water inlet pipe, vacuum evaporator outlet pipe, heating and pressure controlling device and escape pipe, and described vacuum evaporator water inlet pipe and vacuum evaporator outlet pipe are provided with controlled valve.
Described vacuum evaporator escape pipe connects steam condenser.
Described steam condenser includes steam inlet, hydrochloric acid reception tank, coolant inlet, cooling liquid outlet, steam (vapor) outlet.
Described gas absorption cell is provided with gas absorption cell air inlet pipe, gas absorption cell is provided with gas absorption cell upper cover, gas absorption cell upper cover design coning structure, conical structure top is provided with gas absorption cell discharge, gas absorption cell receives the gas from steam condenser and aerating oxidation sedimentation tank, is contained with HCl gas absorbent in gas absorption cell.
Described vacuum evaporator outlet pipe connects aerating oxidation sedimentation tank water inlet pipe.
Described aerating oxidation sedimentation tank includes aeration mixed zone and settling zone, aeration is provided with aeration plate bottom mixed zone, described aeration plate be arranged over aerating oxidation sedimentation tank water distribution branch pipe, described aerating oxidation sedimentation tank water distribution branch pipe connects aerating oxidation sedimentation tank water inlet pipe, described aeration plate is connected to the aerator outside aerating oxidation sedimentation tank by aeration tube, it is provided with baffle plate in described settling zone, the inwall of this baffle plate and sedimentation tank forms the waste water runner entering settling zone as waste water, the exit of settling zone is provided with aerating oxidation sedimentation tank three phase separator, the outlet top of settling zone is provided with aerating oxidation sedimentation tank overfalling weir, the tapered structure of settling zone bottom design, sediment discharge valve it is provided with bottom settling zone. aerating oxidation sedimentation tank overfalling weir connects aerating oxidation sedimentation tank outlet pipe and regulating reservoir. aerating oxidation sedimentation tank is provided with cone upper cover, and the top of cone upper cover is provided with gas sampling pipe.
Described regulating reservoir includes regulating reservoir water inlet pipe and regulating reservoir outlet pipe, for regulating the pH value of waste water; The water outlet of regulating reservoir outlet pipe enters baffling aerating filter.
Described baffling aerating filter middle and upper part is conical structure for cylindrical, bottom, including lower current area, ascending zone and mud district; Described lower current area is positioned at the middle part of the cylindrical structural of baffling aerating filter, for cylindrical structural, lower current area top is provided with baffling aerating filter water inlet pipe and baffling aerating filter water distributor, lower current area filler it is provided with in the middle part of lower current area, lower current area bottom is provided with lower current area aeration tube, the bottom of described lower current area is provided with deflection plate, and the vertical section of described deflection plate is horn-like; Described ascending zone is positioned at the top of the periphery of lower current area, deflection plate, is provided with ascending zone filler in the middle part of ascending zone, and bottom is provided with ascending zone aeration tube, and the exit on ascending zone top is provided with baffling aerating filter overfalling weir; Described mud district is positioned at the bottom of the bottom of baffling aerating filter, lower current area and ascending zone, and the bottom in mud district is provided with baffling aerating filter mud discharging valve.
A kind of method adopting above-mentioned steel chlorohydric acid pickling wastewater treatment equipment to carry out wastewater treatment, has following steps:
1. steel chlorohydric acid pickling waste water enters vacuum evaporator by vacuum evaporator water inlet pipe, the temperature that heating regulates vacuum evaporator with pressure controlling device is 80��90 DEG C, vacuum is 0.05��0.07, the raising of vacuum can be greatly lowered the reaction temperature of waste water, waste water is made to seethe with excitement at relatively low temperature, accelerate the diffusion rate of HCl, reduce evaporation time.HCl in waste water evaporates away from waste water, enters steam condenser by vacuum evaporator escape pipe; Waste water after evaporation enters aerating oxidation sedimentation tank water inlet pipe by vacuum evaporator outlet pipe.
2. steam enters steam condenser by steam inlet, coolant is entered steam condenser by coolant inlet, steam contacts with coolant, the cooled liquid of heat in steam absorbs to be taken away, HCl gas becomes hydrochloric acid liquid, fall under gravity into hydrochloric acid reception tank, the HCl recovery recycling in hydrochloric acid reception tank; Absorb the coolant after heat to be flowed out by cooling liquid outlet, steam after cooling is entered gas absorption cell by steam (vapor) outlet and gas absorption cell air inlet pipe, HCl gas absorbent in gas absorption cell absorbs the HCl composition in gas further, and the discharge on gas absorption cell top is the collection and confinement of gases discharge after absorption process.
3. the waste water after evaporation enters the middle and lower part of aerating oxidation sedimentation tank by aerating oxidation sedimentation tank water inlet pipe and aerating oxidation sedimentation tank water distribution branch pipe; It is positioned at the aeration plate below aerating oxidation sedimentation tank water distribution branch pipe and produces a large amount of tiny bubbles, the Fe in waste water2+It is oxidized to Fe3+, generate Fe2O3, the waste water runner of the waste water entrance settling zone after oxidation reaction, aerating oxidation sedimentation tank three phase separator realizes solid-liquid separation; Fe2O3Sink to the bottom of aerating oxidation sedimentation tank settling zone under gravity, discharged by the sediment discharge valve of bottom; Waste water enters regulating reservoir by aerating oxidation sedimentation tank overfalling weir, aerating oxidation sedimentation tank outlet pipe, regulates the pH value of waste water, and the waste water after regulating reservoir adjustment enters baffling aerating filter.
4. the waste gas that aerating oxidation sedimentation tank produces is collected by the gas sampling pipe on cone upper cover top, enter gas absorption cell, HCl gas absorbent in gas absorption cell absorbs the HCl composition in waste gas further, and the discharge on gas absorption cell top is the collection and confinement of gases discharge after absorption process.
5. waste water passes through baffling aerating filter water inlet pipe, baffling aerating filter water distributor enters the lower current area of baffling aerating filter, air and the waste water that lower current area aeration tube produces crosses generation biochemical reaction in lower current area filler, waste water is filtered by lower current area filler simultaneously, waste water is by entering ascending zone after deflection plate, ascending zone filler occurs biochemical reaction, waste water is filtered by ascending zone filler simultaneously, the mud that lower current area and ascending zone produce sinks to mud district, emitted by the baffling aerating filter mud discharging valve bottom mud district, water after the process of baffling aerating filter is by baffling aerating filter overfalling weir qualified discharge.
6. the Fe that aerating oxidation sedimentation tank is discharged2O3Dehydration, recycle after drying.
7. outward transport after the excess sludge dehydration that baffling aerating filter produces.
The invention has the beneficial effects as follows: treatment in accordance with local conditions, capital expenditure is few, easy to maintenance, and energy consumption is relatively low, steel chlorohydric acid pickling waste water is had reasonable process depth effect, it is possible to realize sewage recycling, sewage is comprehensively utilized.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is the structural representation of embodiment of the present invention vacuum evaporator.
In Fig. 1: 1. vacuum evaporator, 1-1. vacuum evaporator water inlet pipe, 1-2. vacuum evaporator outlet pipe, 1-3. heats and pressure controlling device, 1-4. vacuum evaporator escape pipe.
Fig. 2 is the structural representation of embodiment of the present invention steam condenser.
In Fig. 2: 2. steam condenser, 2-1. steam inlet, 2-2. steam (vapor) outlet, 2-3. hydrochloric acid reception tank, 2-4. coolant inlet, 2-5. cooling liquid outlet.
Fig. 3 is the structural representation of embodiment of the present invention gas absorption cell.
In Fig. 3: 3. gas absorption cell, 3-1. gas absorption cell air inlet pipe, 3-2. gas absorption cell upper cover, 3-3. gas absorption cell discharge, 3-4. HCl gas absorbent.
Fig. 4 is the structural representation of embodiment of the present invention aerating oxidation sedimentation tank.
In Fig. 4: 4. aerating oxidation sedimentation tank, 4-1. aeration mixed zone, 4-2. settling zone, 4-3. aeration plate, 4-4. aerating oxidation sedimentation tank water distribution branch pipe, 4-5. aerating oxidation sedimentation tank water inlet pipe, 4-6. aerator, 4-7. baffle plate, 4-8. aerating oxidation sedimentation tank three phase separator, 4-9. aerating oxidation sedimentation tank overfalling weir, 4-10. sediment discharge valve, 4-11. aerating oxidation sedimentation tank upper cover, 4-12. gas sampling pipe.
Fig. 5 is the structural representation of embodiment of the present invention baffling aerating filter.
In Fig. 5: 5. baffling aerating filter, 5-1. lower current area, 5-2. ascending zone, 5-3. mud district, 5-4. baffling aerating filter water inlet pipe, 5-5. baffling aerating filter water distributor, 5-6. lower current area filler, 5-7. lower current area aeration tube, 5-8. deflection plate, 5-9. ascending zone filler, 5-10. baffling aerating filter overfalling weir, 5-11. baffling aerating filter mud discharging valve.
Fig. 6 is the process chart of the embodiment of the present invention.
Detailed description of the invention
In conjunction with the accompanying drawings, the present invention is further detailed explanation. These accompanying drawings are the schematic diagram of simplification, and the basic structure of the present invention is only described in a schematic way, and therefore it only shows the composition relevant with the present invention.
Embodiment
As shown in Fig. 1��Fig. 6, one steel chlorohydric acid pickling wastewater treatment equipment of the present invention, including vacuum evaporator 1, steam condenser 2, gas absorption cell 3, aerating oxidation sedimentation tank 4, regulating reservoir and baffling aerating filter 5.
Described vacuum evaporator 1 includes vacuum evaporator water inlet pipe 1-1, vacuum evaporator outlet pipe 1-2, heating and pressure controlling device 1-3 and vacuum evaporator escape pipe 1-4, and described vacuum evaporator water inlet pipe 1-1, vacuum evaporator outlet pipe 1-2 are provided with controlled valve.
Described vacuum evaporator escape pipe 1-4 connects steam condenser 2.
Described steam condenser 2 includes steam inlet 2-1, steam (vapor) outlet 2-2, hydrochloric acid reception tank 2-3, coolant inlet 2-4, cooling liquid outlet 2-5.
Described gas absorption cell 3 is provided with gas absorption cell air inlet pipe 3-1, gas absorption cell is provided with gas absorption cell upper cover 3-2, gas absorption cell upper cover design coning structure, conical structure top is provided with gas absorption cell discharge 3-3, gas absorption cell receives the gas from steam condenser and aerating oxidation sedimentation tank, is contained with HCl gas absorbent 3-4 in gas absorption cell.
Described vacuum evaporator outlet pipe 1-2 connects aerating oxidation sedimentation tank water inlet pipe.
Described aerating oxidation sedimentation tank 4 includes aeration mixed zone 4-1 and settling zone 4-2, aeration plate 4-3 it is provided with bottom aeration mixed zone, described aeration plate be arranged over aerating oxidation sedimentation tank water distribution branch pipe 4-4, described aerating oxidation sedimentation tank water distribution branch pipe 4-4 connects aerating oxidation sedimentation tank water inlet pipe 4-5, described aeration plate 4-3 is connected to the aerator 4-6 outside aerating oxidation sedimentation tank by aeration tube, baffle plate 4-7 it is provided with in described settling zone, the inwall of this baffle plate and sedimentation tank forms the waste water runner entering settling zone as waste water, the exit of settling zone is provided with aerating oxidation sedimentation tank three phase separator 4-8, the outlet top of settling zone is provided with aerating oxidation sedimentation tank overfalling weir 4-9, the tapered structure of settling zone bottom design, sediment discharge valve 4-10 it is provided with bottom settling zone.Aerating oxidation sedimentation tank overfalling weir 4-9 connects aerating oxidation sedimentation tank outlet pipe and regulating reservoir. Aerating oxidation sedimentation tank is provided with the aerating oxidation sedimentation tank upper cover 4-11 of cone, and the top of aerating oxidation sedimentation tank upper cover 4-11 is provided with gas sampling pipe 4-12.
Described regulating reservoir includes regulating reservoir water inlet pipe and regulating reservoir outlet pipe, for regulating the pH value of waste water; The water outlet of regulating reservoir outlet pipe enters baffling aerating filter 5.
Described baffling aerating filter 5 middle and upper part is conical structure for cylindrical, bottom, including lower current area 5-1, ascending zone 5-2 and mud district 5-3; Described lower current area 5-1 is positioned at the middle part of the cylindrical structural of baffling aerating filter, for cylindrical structural, lower current area top is provided with baffling aerating filter water inlet pipe 5-4 and baffling aerating filter water distributor 5-5, lower current area filler 5-6 it is provided with in the middle part of lower current area, lower current area bottom is provided with lower current area aeration tube 5-7, the bottom of described lower current area is provided with deflection plate 5-8, and the vertical section of described deflection plate is horn-like; Described ascending zone 5-2 is positioned at the top of the periphery of lower current area 5-1, deflection plate 5-8, is provided with ascending zone filler 5-9 in the middle part of ascending zone, and bottom is provided with ascending zone aeration tube, and the exit on ascending zone top is provided with baffling aerating filter overfalling weir 5-10; Described mud district 5-3 is positioned at the bottom of the bottom of baffling aerating filter, lower current area and ascending zone, and the bottom in mud district is provided with baffling aerating filter mud discharging valve 5-11.
A kind of method adopting above-mentioned steel chlorohydric acid pickling wastewater treatment equipment to carry out wastewater treatment, has following steps:
1. steel chlorohydric acid pickling waste water enters vacuum evaporator by vacuum evaporator water inlet pipe 1-1, the temperature that heating regulates vacuum evaporator with pressure controlling device 1-3 is 85 DEG C, vacuum is 0.06, the raising of vacuum can be greatly lowered the reaction temperature of waste water, waste water is made to seethe with excitement at relatively low temperature, accelerate the diffusion rate of HCl, reduce evaporation time. HCl in waste water evaporates away from waste water, enters steam condenser 2 by vacuum evaporator escape pipe 1-4; Waste water after evaporation enters aerating oxidation sedimentation tank water inlet pipe 4-5 by vacuum evaporator outlet pipe 1-2.
2. HCl steam enters steam condenser 2 by steam inlet 2-1, coolant is entered steam condenser by coolant inlet 2-4, steam contacts with coolant, the cooled liquid of heat in steam absorbs to be taken away, HCl gas becomes hydrochloric acid liquid, fall under gravity into hydrochloric acid reception tank 2-3, the HCl recovery recycling in hydrochloric acid reception tank; Absorb the coolant after heat to be flowed out by cooling liquid outlet 2-5, steam after cooling is entered gas absorption cell 3 by steam (vapor) outlet 2-2 and gas absorption cell air inlet pipe 3-1, HCl gas absorbent 3-4 in gas absorption cell 3 absorbs the HCl composition in gas further, and gas absorption cell discharge 3-3 is the collection and confinement of gases discharge after absorption process.
3. the waste water after evaporation enters the middle and lower part of aerating oxidation sedimentation tank by aerating oxidation sedimentation tank water inlet pipe 4-5 and aerating oxidation sedimentation tank water distribution branch pipe 4-4; It is positioned at the aeration plate 4-3 below aerating oxidation sedimentation tank water distribution branch pipe 4-4 and produces a large amount of tiny bubbles, the Fe in waste water2+It is oxidized to Fe3+, generate Fe2O3, the waste water runner of the waste water entrance settling zone after oxidation reaction, aerating oxidation sedimentation tank three phase separator 4-8 realizes solid-liquid separation; Fe2O3Sink to the bottom of aerating oxidation sedimentation tank settling zone under gravity, discharged by the sediment discharge valve 4-10 of bottom;Waste water enters regulating reservoir by aerating oxidation sedimentation tank overfalling weir 4-9, aerating oxidation sedimentation tank outlet pipe, regulates the pH value of waste water, and the waste water after regulating reservoir adjustment enters baffling aerating filter 5.
4. the waste gas that aerating oxidation sedimentation tank produces is collected by the gas sampling pipe 4-12 on cone upper cover top, enter gas absorption cell 3, HCl gas absorbent 3-4 in gas absorption cell absorbs the HCl composition in waste gas further, and gas absorption cell discharge 3-3 is the collection and confinement of gases discharge after absorption process.
5. waste water passes through baffling aerating filter water inlet pipe 5-4, baffling aerating filter water distributor 5-5 enters the lower current area 5-1 of baffling aerating filter, air and the waste water that lower current area aeration tube 5-7 produces crosses generation biochemical reaction in lower current area filler 5-6, waste water is filtered by lower current area filler 5-6 simultaneously, waste water is by entering ascending zone 5-2 after deflection plate 5-8, ascending zone filler 5-9 occurs biochemical reaction, waste water is filtered by ascending zone filler 5-9 simultaneously, the mud that lower current area and ascending zone produce sinks to mud district 5-3, emitted by the baffling aerating filter mud discharging valve 5-11 bottom mud district, water after the process of baffling aerating filter is by baffling aerating filter overfalling weir 5-10 qualified discharge.
6. the Fe that aerating oxidation sedimentation tank is discharged2O3Dehydration, recycle after drying.
7. outward transport after the excess sludge dehydration that baffling aerating filter produces.
With the above-mentioned desirable embodiment according to the present invention for enlightenment, by above-mentioned description, relevant staff can carry out various change and amendment completely in the scope not necessarily departing from this invention technological thought. The technical scope of this invention is not limited to the content in description, it is necessary to determine its technical scope according to right.
Claims (2)
1. a steel chlorohydric acid pickling wastewater treatment equipment, it is characterised in that: include vacuum evaporator (1), steam condenser (2), gas absorption cell (3), aerating oxidation sedimentation tank (4), regulating reservoir and baffling aerating filter (5);
Described vacuum evaporator (1) includes vacuum evaporator water inlet pipe (1-1), vacuum evaporator outlet pipe (1-2), heating and pressure controlling device (1-3) and vacuum evaporator escape pipe (1-4), and described vacuum evaporator water inlet pipe (1-1), vacuum evaporator outlet pipe (1-2) are provided with controlled valve;
Described vacuum evaporator escape pipe (1-4) connects steam condenser (2);
Described steam condenser (2) includes steam inlet (2-1), steam (vapor) outlet (2-2), hydrochloric acid reception tank (2-3), coolant inlet (2-4) and cooling liquid outlet (2-5);
Described gas absorption cell (3) is provided with gas absorption cell air inlet pipe (3-1), gas absorption cell is provided with gas absorption cell upper cover (3-2), gas absorption cell upper cover design coning structure, conical structure top is provided with gas absorption cell discharge (3-3), gas absorption cell receives the gas from steam condenser and aerating oxidation sedimentation tank, is contained with HCl gas absorbent (3-4) in gas absorption cell;
Described vacuum evaporator outlet pipe (1-2) connects aerating oxidation sedimentation tank water inlet pipe;
Described aerating oxidation sedimentation tank (4) includes aeration mixed zone (4-1) and settling zone (4-2), aeration plate (4-3) it is provided with bottom aeration mixed zone, described aeration plate be arranged over aerating oxidation sedimentation tank water distribution branch pipe (4-4), described aerating oxidation sedimentation tank water distribution branch pipe (4-4) connects aerating oxidation sedimentation tank water inlet pipe (4-5), described aeration plate (4-3) is connected to the aerator (4-6) outside aerating oxidation sedimentation tank, baffle plate (4-7) it is provided with in described settling zone, the inwall of this baffle plate and sedimentation tank forms the waste water runner entering settling zone as waste water, the exit of settling zone is provided with aerating oxidation sedimentation tank three phase separator (4-8), the outlet top of settling zone is provided with aerating oxidation sedimentation tank overfalling weir (4-9), the tapered structure of settling zone bottom design, sediment discharge valve (4-10) it is provided with bottom settling zone,Aerating oxidation sedimentation tank overfalling weir (4-9) connects aerating oxidation sedimentation tank outlet pipe and regulating reservoir; Aerating oxidation sedimentation tank is provided with aerating oxidation sedimentation tank upper cover (4-11) of cone, and the top of aerating oxidation sedimentation tank upper cover (4-11) is provided with gas sampling pipe (4-12);
Described regulating reservoir includes regulating reservoir water inlet pipe and regulating reservoir outlet pipe, for regulating the pH value of waste water; The water outlet of regulating reservoir outlet pipe enters baffling aerating filter (5);
Described baffling aerating filter (5) middle and upper part is conical structure for cylindrical, bottom, including lower current area (5-1), ascending zone (5-2) and mud district (5-3); Described lower current area (5-1) is positioned at the middle part of the cylindrical structural of baffling aerating filter, for cylindrical structural, lower current area top is provided with baffling aerating filter water inlet pipe (5-4) and baffling aerating filter water distributor (5-5), lower current area filler (5-6) it is provided with in the middle part of lower current area, lower current area bottom is provided with lower current area aeration tube (5-7), the bottom of described lower current area is provided with deflection plate (5-8), and the vertical section of described deflection plate is horn-like; Described ascending zone (5-2) is positioned at the top of the periphery of lower current area (5-1), deflection plate (5-8), ascending zone filler (5-9) it is provided with in the middle part of ascending zone, bottom is provided with ascending zone aeration tube, and the exit on ascending zone top is provided with baffling aerating filter overfalling weir (5-10); Described mud district (5-3) is positioned at the bottom of the bottom of baffling aerating filter, lower current area and ascending zone, and the bottom in mud district is provided with baffling aerating filter mud discharging valve (5-11).
2. one kind adopts the method that steel chlorohydric acid pickling wastewater treatment equipment as claimed in claim 1 carries out wastewater treatment, it is characterised in that: there are following steps;
1. steel chlorohydric acid pickling waste water enters vacuum evaporator by vacuum evaporator water inlet pipe (1-1), heating and pressure controlling device (1-3) regulate the temperature of vacuum evaporator be 80��90 DEG C, vacuum be 0.05��0.07, the raising of vacuum can be greatly lowered the reaction temperature of waste water, waste water is made to seethe with excitement at relatively low temperature, accelerate the diffusion rate of HCl gas, reduce evaporation time; HCl gas in waste water evaporates away from waste water, enters steam condenser (2) by vacuum evaporator escape pipe (1-4); Waste water after evaporation enters aerating oxidation sedimentation tank water inlet pipe (4-5) by vacuum evaporator outlet pipe (1-2);
2. HCl gas enters steam condenser (2) by steam inlet (2-1), coolant is entered steam condenser by coolant inlet (2-4), steam contacts with coolant, the cooled liquid of heat in steam absorbs to be taken away, HCl gas becomes hydrochloric acid liquid, fall under gravity into hydrochloric acid reception tank (2-3), the HCl recovery recycling in hydrochloric acid reception tank; Absorb the coolant after heat to be flowed out by cooling liquid outlet (2-5), steam after cooling is entered gas absorption cell (3) by steam (vapor) outlet (2-2) and gas absorption cell air inlet pipe (3-1), HCl gas absorbent (3-4) in gas absorption cell (3) absorbs the HCl composition in gas further, and gas absorption cell discharge (3-3) is the collection and confinement of gases discharge after absorption process;
3. the waste water after evaporation enters the middle and lower part of aerating oxidation sedimentation tank by aerating oxidation sedimentation tank water inlet pipe (4-5) and aerating oxidation sedimentation tank water distribution branch pipe (4-4); The aeration plate (4-3) being positioned at aerating oxidation sedimentation tank water distribution branch pipe (4-4) lower section produces a large amount of tiny bubble, the Fe in waste water2+It is oxidized to Fe3+, generate Fe2O3, the waste water runner of the waste water entrance settling zone after oxidation reaction, aerating oxidation sedimentation tank three phase separator (4-8) realizes solid-liquid separation;Fe2O3Sink to the bottom of aerating oxidation sedimentation tank settling zone under gravity, discharged by the sediment discharge valve (4-10) of bottom; Waste water enters regulating reservoir by aerating oxidation sedimentation tank overfalling weir (4-9), aerating oxidation sedimentation tank outlet pipe, regulates the pH value of waste water, and the waste water after regulating reservoir adjustment enters baffling aerating filter (5);
4. the waste gas that aerating oxidation sedimentation tank produces is collected by the gas sampling pipe (4-12) on cone upper cover top, enter gas absorption cell (3), HCl gas absorbent (3-4) in gas absorption cell absorbs the HCl composition in waste gas further, and gas absorption cell discharge (3-3) is the collection and confinement of gases discharge after absorption process;
5. waste water passes through baffling aerating filter water inlet pipe (5-4), baffling aerating filter water distributor (5-5) enters the lower current area (5-1) of baffling aerating filter, the air that lower current area aeration tube (5-7) produces and waste water cross generation biochemical reaction in lower current area filler (5-6), waste water is filtered by lower current area filler (5-6) simultaneously, waste water enters ascending zone (5-2) afterwards by deflection plate (5-8), ascending zone filler (5-9) occurs biochemical reaction, waste water is filtered by ascending zone filler (5-9) simultaneously, the mud that lower current area and ascending zone produce sinks to mud district (5-3), emitted by baffling aerating filter mud discharging valve (5-11) bottom mud district, water after the process of baffling aerating filter is by baffling aerating filter overfalling weir (5-10) qualified discharge,
6. the Fe that aerating oxidation sedimentation tank is discharged2O3Through dehydration, recycle after drying;
7. outward transport after the excess sludge dehydration that baffling aerating filter produces.
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Cited By (8)
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| CN106882903A (en) * | 2017-03-09 | 2017-06-23 | 常州大学 | A kind of steel chlorohydric acid pickling sewage pretreatment device and method |
| CN106892537A (en) * | 2017-03-13 | 2017-06-27 | 常州大学 | A kind of methacrylic acid wastewater processing system |
| CN107324284A (en) * | 2017-07-07 | 2017-11-07 | 天津市职业大学 | A kind of system of recycling treatment iron-contained industrial waste hydrochloric acid |
| CN109030437A (en) * | 2018-07-04 | 2018-12-18 | 中山出入境检验检疫局检验检疫技术中心 | A kind of detection device and detection method of aflatoxin |
| CN109851110A (en) * | 2018-12-20 | 2019-06-07 | 安徽楚江特钢有限公司 | A kind of steel band pickling waste waters processing method |
| CN110482789A (en) * | 2019-08-23 | 2019-11-22 | 江油市长祥特殊钢制造有限公司 | A kind of steel acid waste water processing equipment and its processing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106882903A (en) * | 2017-03-09 | 2017-06-23 | 常州大学 | A kind of steel chlorohydric acid pickling sewage pretreatment device and method |
| CN106892537A (en) * | 2017-03-13 | 2017-06-27 | 常州大学 | A kind of methacrylic acid wastewater processing system |
| CN107324284A (en) * | 2017-07-07 | 2017-11-07 | 天津市职业大学 | A kind of system of recycling treatment iron-contained industrial waste hydrochloric acid |
| CN109030437A (en) * | 2018-07-04 | 2018-12-18 | 中山出入境检验检疫局检验检疫技术中心 | A kind of detection device and detection method of aflatoxin |
| CN109851110A (en) * | 2018-12-20 | 2019-06-07 | 安徽楚江特钢有限公司 | A kind of steel band pickling waste waters processing method |
| CN110482789A (en) * | 2019-08-23 | 2019-11-22 | 江油市长祥特殊钢制造有限公司 | A kind of steel acid waste water processing equipment and its processing method |
| CN111804198A (en) * | 2020-07-29 | 2020-10-23 | 陈丽仙 | A treatment tank for domestic sewage purifies |
| CN114506908A (en) * | 2022-01-24 | 2022-05-17 | 氢华(深圳)实业发展有限公司 | High-concentration hydrogen-rich water cup and water electrolysis device |
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