CN110963619A - Integrated treatment device for steel pickling waste liquid - Google Patents
Integrated treatment device for steel pickling waste liquid Download PDFInfo
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- CN110963619A CN110963619A CN201911212524.6A CN201911212524A CN110963619A CN 110963619 A CN110963619 A CN 110963619A CN 201911212524 A CN201911212524 A CN 201911212524A CN 110963619 A CN110963619 A CN 110963619A
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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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- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
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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
- C02F1/66—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
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/203—Iron or iron compound
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention relates to an integrated treatment device for steel pickling waste liquid, which is provided with a replacement chamber, an ionization chamber, an alkalization chamber, a precipitation chamber, a mixing chamber, an adsorption chamber, a filter chamber and a clear water chamber. The treatment device can effectively treat the steel pickling waste liquid, has the advantages of simple and practical method, low investment and high recovery rate of the regenerated acid and the iron salt, and is suitable for being applied to small and medium-sized enterprises.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to an integrated treatment device for steel pickling waste liquid.
Background
Pickling is a conventional method for cleaning metal surfaces and is also a necessary process for steel production and processing, and aims to remove oxides from the metal surfaces. In the pickling process, the acid cleaning agent is contacted with the metal surface and reacts with the metal surface, and the pickling efficiency of the acid liquor is continuously reduced along with the reduction of the hydrogen ion concentration and the increase of the metal ion concentration in the acid liquor, so that the acid liquor becomes the pickling waste liquid which needs to be discharged. For common steel, the pickling effect of hydrochloric acid is more remarkable than that of sulfuric acid, and the loss of base iron is less due to the stripping effect of hydrochloric acid pickling, so that hydrochloric acid gradually becomes a main cleaning agent in a steel cleaning process.
The steel pickling waste liquid contains a large amount of hydrogen ions and metal ions, and if the waste liquid is directly discharged, the ecological environment of water and soil is seriously influenced. At present, the traditional treatment modes of the pickling waste liquid are outward transportation consignment treatment and alkali addition neutralization treatment. The alkali is added for neutralization treatment, carbide slag or lime slaking product is adopted to react with acid and metal ions in the acid washing waste liquid to generate hydroxide precipitate, and the carbide slag and the lime slaking product are respectively treated after solid-liquid separation. The process comprises the processes of neutralization, flocculation, sedimentation, filtration and the like, and has the problems of long flow, more facilities, large occupied area and the like. Large-scale enterprises generally adopt a high-temperature roasting method, and the method has the advantages of high recovery rates of the regenerated acid and the ferric salt, but has huge investment, high equipment requirements, strict operating conditions and high operation and maintenance costs, which limits the large-scale popularization of the process.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: in order to overcome the defects in the prior art, the invention provides an integrated treatment device for steel pickling waste liquid.
The technical scheme adopted by the invention for solving the technical problems is as follows: an integrated treatment device for steel pickling waste liquid comprises a displacement chamber, an ionization chamber, an alkalization chamber, a precipitation chamber, a mixing chamber, an adsorption chamber, a filter chamber and a clean water chamber, wherein the displacement chamber is provided with a stirring area and a separation area, the upper part of the stirring area is provided with a liquid inlet pipe, the lower part of the stirring area is provided with a displacement stirrer, and a displacer adding meter is arranged between the liquid inlet pipe and the displacement stirrer; the ionization chamber is provided with an anode region, a cathode region and an intermediate region which is positioned between the anode region and the cathode region and communicated with the separation region, an anion exchange membrane is arranged between the intermediate region and the anode region, and a cation exchange membrane is arranged between the intermediate region and the cathode region; the alkalization chamber is communicated with the cathode area and is provided with an alkali liquor adding meter and a blast stirring oxidizer; the settling chamber is communicated with the alkalization chamber, a settling discharge valve is arranged at the bottom of the settling chamber, and a supernatant discharge pipe is arranged at the upper part of the settling chamber; the mixing chamber is respectively communicated with the middle area of the ionization chamber and a clear liquid discharge pipe of the settling chamber, and a mixing stirrer is arranged in the mixing chamber; the adsorption chamber is communicated with the side part of the mixing chamber, and an adsorbent is arranged in the adsorption chamber; the filtering chamber is communicated with one side of the adsorption chamber, and a filtering material is arranged in the filtering chamber; the clear water chamber communicates one side of filter chamber, and the clear water chamber is equipped with the outlet pipe of discharge water up to standard.
The lower part of the replacement chamber is provided with a conical structure consisting of an inclined bottom plate, and the lower part of the conical structure is provided with a replacement discharge valve.
The anode region is internally provided with an anode which is made of graphite material and is arranged into a ring-shaped or square-lattice structure, and the cathode region is internally provided with a cathode which is made of graphite or stainless steel material and is arranged into a ring-shaped or square-lattice structure.
The anode area is internally provided with an anolyte discharge pipe, and the upper parts of the anode area and the cathode area are respectively provided with an electrolytic gas discharge pipe.
The bottom of the settling chamber is of a conical structure, and the settling discharge valve is arranged at the bottom end of the conical structure.
One side of the adsorption chamber is provided with an adsorbent fixing plate with holes.
And filter material fixing plates with holes are arranged on two sides of the filter chamber.
The invention has the beneficial effects that: the method adopts a displacement mode to displace heavy metal simple substance precipitation in the pickling waste liquid, an ionization mode to ionize acid radical ions and iron ion-containing cations in the steel pickling waste liquid, and an alkalization mode to generate ferric hydroxide precipitates from ferric ions in the waste liquid, and finally discharges up-to-standard water through precipitation, adsorption and filtration.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic sectional view of a-a in fig. 1.
FIG. 3 is a schematic cross-sectional view of B-B in FIG. 1.
In the figure: 1. the device comprises a displacement chamber, 1-1 stirring area, 1-2 separation area, 1-3 liquid inlet pipe, 1-4 displacer adding meter, 1-5 displacement stirrer, 1-6 displacement discharge valve, 2 ionization chamber, 2-1 anode area, 2-2 cathode area, 2-3 intermediate area, 2-4 anolyte discharge pipe, 3 alkalization chamber, 3-1 alkali liquor adding meter, 3-2 blast stirring oxidizer, 4 settling chamber, 4-1 settling discharge valve, 4-2 supernatant discharge pipe, 5 mixing chamber, 6 adsorption chamber, 7 filtering chamber, 8 clear water chamber and 8-1 water outlet pipe.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1 to 3, the integrated treatment device for the steel pickling waste liquid comprises a replacement chamber 1, an ionization chamber 2, an alkalization chamber 3, a precipitation chamber 4, a mixing chamber 5, an adsorption chamber 6, a filter chamber 7 and a clean water chamber 8.
The displacement chamber 1 is provided with a stirring area 1-1 and a separation area 1-2, and a separation plate is arranged between the stirring area 1-1 and the separation area 1-2; a liquid inlet pipe 1-3 for introducing pickling waste liquid is arranged at the upper part of the stirring area 1-1, a displacer addition meter 1-4 for adding a displacer is arranged at the middle upper part of the stirring area 1-1, and the displacer added by the displacer addition meter 1-4 is zero-valent iron powder; a replacement stirrer 1-5 for stirring and mixing the pickling waste liquid is arranged in the stirring area 1-1; the lower part of the replacement chamber 1 adopts an inclined bottom plate to form a conical structure, and the bottom of the conical structure is provided with a replacement discharge valve 1-6 for discharging solid matters obtained by replacement.
A rectifying plate is arranged between the displacement chamber 1 and the ionization chamber 2, the ionization chamber 2 comprises an anode region 2-1, a cathode region 2-2 and a middle region 2-3, wherein the middle region 2-3 is communicated with a separation region 1-2 of the displacement chamber 1, and the anode region 2-1 and the cathode region 2-2 are positioned at two sides of the middle region 2-3; the middle area 2-3 and the anode area 2-1 are separated by an anion exchange membrane, and the middle area 2-3 and the cathode area 2-2 are separated by a cation exchange membrane; an anode made of graphite material is arranged in the anode region 2-1, the cross section of the anode can be circular or rectangular, and the anode is arranged into an annular or grid-shaped structure; the cathode area 2-2 is internally provided with a cathode made of graphite or stainless steel materials, the cross section of the cathode is circular or rectangular, the cathode is arranged into an annular or grid-shaped structure, and the anode and the cathode are respectively communicated with the anode and the cathode of a direct current power supply. An anolyte discharge pipe 2-4 is arranged in the anode area 2-1, and electrolytic gas discharge pipes are respectively arranged at the upper parts of the anode area 2-1 and the cathode area 2-2.
The alkalization chamber 3 is communicated with a cathode region 2-2 of the ionization chamber 2, and the alkalization chamber 3 is provided with an alkali liquor adding meter 3-1 and a blast stirring oxidizer 3-2.
The settling chamber 4 is communicated with the alkalization chamber 3, the bottom of the settling chamber 4 is designed to be a conical structure, a settling discharge valve 4-1 is arranged at the lower part of the conical structure, and a supernatant discharge pipe 4-2 is arranged at the upper part of the settling chamber 4.
The mixing chamber 5 is communicated with the middle area 2-3 of the ionization chamber 2, the supernatant discharged by the supernatant discharge pipe 4-2 of the settling chamber enters the mixing chamber 5, and the mixing chamber 5 is provided with a mixing stirrer.
The adsorption chamber 6 is positioned at the side part of the mixing chamber 5, the adsorption chamber 6 is provided with an adsorbent, and one side of the adsorption chamber is provided with an adsorbent fixing plate with holes; the adsorbent is activated carbon.
The filtering chamber 7 is positioned on one side of the adsorption chamber 6, a filtering material is arranged in the filtering chamber 7, filtering material fixing plates with holes are arranged on two sides of the filtering chamber 7, and the filtering material is coarse sand.
The clear water chamber 8 is positioned at one side of the filter chamber 7, a water outlet pipe 8-1 is arranged in the clear water chamber, and water discharged by the water outlet pipe 8-1 is discharged or recycled after reaching the standard.
The steps of adopting the integrated treatment device for the steel pickling waste liquid to carry out water treatment are as follows:
①, the steel pickling waste liquid enters a stirring area 1-1 of a replacement chamber 1 through a liquid inlet pipe 1-3, a displacer addition meter 1-4 is used for adding zero-valent iron powder, and a replacement stirrer 1-5 is used for stirring and mixing the steel pickling waste liquid, wherein acid in the pickling waste liquid reacts with the zero-valent iron powder to generate iron salt, and the zero-valent iron powder and heavy metal ions in the pickling waste liquid, such as lead, cadmium, mercury, copper, cobalt, nickel, and the like, undergo a reduction reaction to displace the heavy metal ions, such as lead, cadmium, mercury, copper, cobalt, nickel, and the like, and generate corresponding heavy metal simple substance precipitates;
then the steel pickling waste liquid enters a separation area 1-2, and the separated heavy metal simple substance precipitate solid sinks to the lower part of a displacement chamber 1 under the action of gravity and is discharged through a displacement discharge valve 1-6 at the bottom;
the solid discharged from the displacement discharge valves 1-6 is concentrated, dehydrated, dried, crushed, magnetically separated, recovered by zero-valent iron powder and reused as a displacement agent, and metals such as lead, cadmium, mercury, copper, cobalt, nickel and the like are further separated and recovered.
②, the displaced steel pickling waste liquid enters an intermediate zone 2-3 of the ionization chamber 2, under the action of 40V electric field force, acid radical ions in the steel pickling waste liquid enter an anode zone 2-1 through an anion exchange membrane to form acidic anolyte, the anolyte is discharged through an anolyte discharge pipe 2-4 and is reused in production, and cations such as iron ions and the like in the steel pickling waste liquid enter a cathode zone 2-2 through a cation exchange membrane.
③, enabling the waste liquid of the cathode area 2-2 rich in iron ions to enter an alkalization chamber 3, adding a sodium hydroxide solution into an alkali liquor adding meter 3-1, adjusting the pH value of the waste liquid to 7.5-9, stirring and mixing the waste liquid by a blast stirring oxidizer 3-2, oxidizing bivalent iron ions in the waste liquid into trivalent iron ions, and generating ferric hydroxide precipitates from the trivalent iron ions in the waste liquid under an alkaline condition.
④, the waste liquid from the alkalization chamber 3 enters the precipitation chamber 4, the solid precipitate sinks to the lower part of the precipitation chamber 4 under the action of gravity and is discharged through a precipitation discharge valve 4-1 at the bottom, the solid precipitate containing iron ions is further treated and recycled, and the supernatant liquid of the precipitation chamber 4 enters the mixing chamber 5 through a supernatant liquid discharge pipe 4-2.
⑤, the ionized waste liquid in the middle area 2-3 enters the mixing chamber 5 to be mixed with the supernatant liquid discharged by the supernatant liquid discharge pipe 4-2.
⑥, the mixed waste liquid enters the absorption chamber 6, and the active carbon absorbs the pollutants in the water.
⑦, the water adsorbed by the adsorption chamber 6 enters the filter chamber 7 for filtration.
⑧, the water filtered by the filter chamber 7 enters the clear water chamber 8 and is discharged through the water outlet pipe 8-1 to reach the standard for discharge or reuse.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (7)
1. The utility model provides a steel pickling waste liquid integration processing apparatus, has replacement room, ionization chamber, alkalization room, drip chamber, mixing chamber, adsorption chamber, filter chamber and clear water room, characterized by:
the displacement chamber is provided with a stirring area and a separation area, the upper part of the stirring area is provided with a liquid inlet pipe, the lower part of the stirring area is provided with a displacement stirrer, and a displacer adding meter is arranged between the liquid inlet pipe and the displacement stirrer;
the ionization chamber is provided with an anode region, a cathode region and an intermediate region which is positioned between the anode region and the cathode region and communicated with the separation region, an anion exchange membrane is arranged between the intermediate region and the anode region, and a cation exchange membrane is arranged between the intermediate region and the cathode region;
the alkalization chamber is communicated with the cathode area and is provided with an alkali liquor adding meter and a blast stirring oxidizer;
the settling chamber is communicated with the alkalization chamber, a settling discharge valve is arranged at the bottom of the settling chamber, and a supernatant discharge pipe is arranged at the upper part of the settling chamber;
the mixing chamber is respectively communicated with the middle area of the ionization chamber and the supernatant discharge pipe of the settling chamber, and a mixing stirrer is arranged in the mixing chamber;
the adsorption chamber is communicated with the side part of the mixing chamber, and an adsorbent is arranged in the adsorption chamber;
the filtering chamber is communicated with one side of the adsorption chamber, and a filtering material is arranged in the filtering chamber;
the clear water chamber communicates one side of filter chamber, and the clear water chamber is equipped with the outlet pipe of discharge water up to standard.
2. The integrated treatment apparatus for a steel pickling waste liquid according to claim 1, characterized in that: the lower part of the replacement chamber is provided with a conical structure consisting of an inclined bottom plate, and the lower part of the conical structure is provided with a replacement discharge valve.
3. The integrated treatment apparatus for a steel pickling waste liquid according to claim 1, characterized in that: the anode region is internally provided with an anode which is made of graphite material and is arranged into a ring-shaped or square-lattice structure, and the cathode region is internally provided with a cathode which is made of graphite or stainless steel material and is arranged into a ring-shaped or square-lattice structure.
4. The integrated treatment apparatus for a steel pickling waste liquid according to claim 3, characterized in that: the anode area is internally provided with an anolyte discharge pipe, and the upper parts of the anode area and the cathode area are respectively provided with an electrolytic gas discharge pipe.
5. The integrated treatment apparatus for a steel pickling waste liquid according to claim 1, characterized in that: the bottom of the settling chamber is of a conical structure, and the settling discharge valve is arranged at the bottom end of the conical structure.
6. The integrated treatment apparatus for a steel pickling waste liquid according to claim 1, characterized in that: one side of the adsorption chamber is provided with an adsorbent fixing plate with holes.
7. The integrated treatment apparatus for a steel pickling waste liquid according to claim 1, characterized in that: and filter material fixing plates with holes are arranged on two sides of the filter chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911212524.6A CN110963619A (en) | 2019-12-02 | 2019-12-02 | Integrated treatment device for steel pickling waste liquid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911212524.6A CN110963619A (en) | 2019-12-02 | 2019-12-02 | Integrated treatment device for steel pickling waste liquid |
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| CN110963619A true CN110963619A (en) | 2020-04-07 |
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| CN201911212524.6A Pending CN110963619A (en) | 2019-12-02 | 2019-12-02 | Integrated treatment device for steel pickling waste liquid |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016172219A (en) * | 2015-03-17 | 2016-09-29 | 三菱重工業株式会社 | Method of treating treatment-targeted liquid, and system for recycling nitric acid |
| CN109467167A (en) * | 2018-10-30 | 2019-03-15 | 上海大学 | A kind of method of heavy metal in removal stainless steel acid cleaning waste water |
| CN208814789U (en) * | 2018-08-10 | 2019-05-03 | 江苏皕成环保科技有限公司 | A kind of disposal system of waste hydrochloric acid containing heavy metal and sludge |
-
2019
- 2019-12-02 CN CN201911212524.6A patent/CN110963619A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016172219A (en) * | 2015-03-17 | 2016-09-29 | 三菱重工業株式会社 | Method of treating treatment-targeted liquid, and system for recycling nitric acid |
| CN208814789U (en) * | 2018-08-10 | 2019-05-03 | 江苏皕成环保科技有限公司 | A kind of disposal system of waste hydrochloric acid containing heavy metal and sludge |
| CN109467167A (en) * | 2018-10-30 | 2019-03-15 | 上海大学 | A kind of method of heavy metal in removal stainless steel acid cleaning waste water |
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Application publication date: 20200407 |