CN213294694U - Inorganic waste acid recycling and regenerating device - Google Patents
Inorganic waste acid recycling and regenerating device Download PDFInfo
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- CN213294694U CN213294694U CN202021066019.3U CN202021066019U CN213294694U CN 213294694 U CN213294694 U CN 213294694U CN 202021066019 U CN202021066019 U CN 202021066019U CN 213294694 U CN213294694 U CN 213294694U
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Abstract
The utility model discloses a recovery regenerating unit of inorganic spent acid, including spent acid hold up tank, its characterized in that: the waste acid recovery device is provided with a waste acid lifting pump, a primary filter, a selective ion filter, a concentrated polluted liquid collecting tank and a recovered acid storage tank, wherein the selective ion filter is composed of a selective ion filtering membrane and a membrane shell, a liquid outlet of the waste acid storage tank is connected with the waste acid lifting pump through a first suction pipe, an outlet of the waste acid lifting pump is connected to the primary filter through a first feeding pipeline, an outlet of the primary filter is connected with the selective ion filter through a second feeding pipeline, a filtrate of the selective ion filter enters the recovered acid storage tank through a recovered acid pipeline, and a concentrated polluted liquid is connected to the concentrated polluted liquid collecting tank through a concentrated polluted liquid discharge pipeline. The utility model discloses can carry out recycle to acid, with the pollutant concentration in the spent acid, the alkali that consumes only is about 20% of conventional processing mode in the follow-up processing, and application scope is wide, long service life.
Description
Technical Field
The utility model relates to a waste water treatment technology, concretely relates to a device for carrying out recovery and regeneration to inorganic waste acid.
Background
The acid is an important chemical product and can be used as a cleaning agent, a raw material and a catalyst for industrial production. The industry consumes a large amount of acid every year, and when the impurity concentration in the acid reaches a certain concentration, the acid cannot be used for production and becomes waste acid. According to the national records of hazardous wastes, the acid pickle, acid sludge and acid sludge generated in the processes of manufacturing refined petroleum products, basic chemical manufacturing, steel rolling processing, metal surface treatment and heat treatment processing, electronic component manufacturing and other non-specific industries during production, sale and use belong to hazardous wastes and need to be treated by hazardous waste disposal units with corresponding qualifications. China is the largest acid-producing country and the acid-consuming country in the world, 722767.9 ten thousand tons of sulfuric acid are produced annually in 2015, 9770 ten thousand tons of sulfuric acid are consumed annually, and if the utilization rate is 75%, the annual production amount of the waste sulfuric acid is 2000 ten thousand tons. The waste acid has the dangerous characteristics of high yield, corrosivity, toxicity, reactivity and the like, has great harm to the environment, and causes serious resource waste if not disposed well.
At present, the main process for treating waste acid is a neutralization method, acid-base neutralization processes are adopted by about half of waste acid treatment enterprises in Jiangsu province, and nearly four enterprises treat waste acid by adopting a neutralization precipitation and triple effect evaporation combined process, so that the waste salt slag generated by evaporation is difficult to treat, heavy metals cannot be recycled, and the treatment cost is increased. In addition, a large amount of alkali is inevitably consumed in the neutralization process, and huge waste is caused.
Chinese utility model patent CN205740619U discloses a waste acid treatment device, which comprises an adjusting tank, a primary neutralization reaction tank, a secondary neutralization reaction tank, a tertiary neutralization reaction tank, a sedimentation tank, a solar evaporation room, a baking room, an acid mist collecting tank, an alkali liquor preparation system, a circulating condenser pipe, a distilled water collecting tank, a heat exchanger, a solar heat collector, a sludge concentration tank and a plate and frame filter press; an inlet of the acid mist collection tank is communicated with an acid mist discharge pipe of the regulating tank through an induced draft fan, and an outlet of the acid mist collection tank is connected with an inlet of the primary neutralization reaction tank; the regulating tank, the primary neutralization reaction tank, the secondary neutralization reaction tank and the tertiary neutralization reaction tank are arranged and are sequentially communicated along a pipeline, a primary lift pump is arranged on the pipeline between the regulating tank and the primary neutralization reaction tank, and the alkali liquor preparation system is respectively communicated with the primary neutralization reaction tank, the secondary neutralization reaction tank and the tertiary neutralization reaction tank through pipelines of metering pumps; an outlet of the third-stage neutralization reaction tank is communicated with an inlet of the sedimentation tank through a second-stage lift pump, a sludge outlet of the sedimentation tank is communicated with a sludge concentration tank through the sludge lift pump, a supernatant outlet of the sludge concentration tank is connected with a pipeline of the sedimentation tank, the sludge concentration tank is connected with a plate-and-frame filter press, the plate-and-frame filter press is connected with a baking room through a mud cake conveyer belt, and a filtrate outlet of the plate-and-frame filter press is connected with a solar evaporation room through a pipeline; the water outlet of the sedimentation tank is connected with the solar evaporation room, a waste salt conveying belt is arranged between the solar evaporation room and the baking room, and the solar evaporation room, the heat exchanger and the solar heat collector are sequentially connected for heat exchange; exhaust fans are respectively arranged on the solar evaporation room, the baking room and the sludge concentration tank and are communicated with the distilled water collection tank through a circulating condensation pipe and a condensation collection pipeline; the upper parts of the adjusting tank and the sludge concentration tank are capped; and a stirrer and a pH on-line monitoring device are arranged in the first-stage neutralization reaction tank, the second-stage neutralization reaction tank and the third-stage neutralization reaction tank. The method adopts a multi-stage neutralization reaction tank to solve the problem of acid expiring neutralization and lag, adopts a solar evaporation system to realize energy conservation, and has the problems of large dosage of medicament (especially alkali), more solid waste generation and the like.
Therefore, a new recycling and regenerating device for inorganic waste acid is needed.
Disclosure of Invention
The utility model aims at providing a recovery regenerating unit of inorganic spent acid through structural improvement, realizes spent acid recycle, reduces treatment cost, reduces the medicament consumption.
In order to achieve the purpose of the invention, the technical scheme adopted by the utility model is as follows: the inorganic waste acid recycling and regenerating device comprises a waste acid storage tank, wherein the waste acid storage tank is provided with a waste acid lifting pump, a primary filter, a selective ion filter, a concentrated polluted liquid collecting tank and a recycled acid storage tank, the selective ion filter is composed of a selective ion filtering membrane and a membrane shell, a liquid outlet of the waste acid storage tank is connected with the waste acid lifting pump through a first suction pipe, an outlet of the waste acid lifting pump is connected to the primary filter through a first feeding pipeline, an outlet of the primary filter is connected with the selective ion filter through a second feeding pipeline, a filtered liquid of the selective ion filter enters the recycled acid storage tank through a recycled acid pipeline, and a concentrated liquid of the selective ion filter is connected to the concentrated polluted liquid collecting tank through a concentrated polluted liquid discharge pipeline.
According to the technical scheme, the waste acid filtered by the primary filter selectively permeates inorganic acid in the waste acid through the selective ion filtering membrane, metal ions and other molecular substances are effectively intercepted, the purified acid is used for recycling, and the concentrated waste liquid is stored in the concentrated polluted liquid collecting tank. In the process, about 80% of acid can be recovered, and the concentrated polluted liquid is treated by using the existing neutralization method, and the consumed alkali is only 20% of the conventional treatment mode.
In the technical scheme, the selective ion filtering membrane is a non-glass fiber reinforced plastic wound sanitary nanofiltration membrane, and the aperture is 1-2 nm.
Preferably, the selective ion filtration membrane has a diamond-shaped flow guide net.
The membrane shell of the selective ion filter is a stainless steel reinforced membrane shell with a tetrafluoroethylene lining, and the pressure resistance of the membrane shell is more than 2 Mpa.
The selective ion filter with the structure can be used for treating waste acid containing nitric acid, hydrochloric acid, hydrofluoric acid, sulfuric acid and mixed acid, and has wide applicability.
In the technical scheme, the range of the interception aperture of the primary filter is 0.1-10 mu m.
According to the further technical scheme, an outlet of the recovered acid storage tank is connected with a recovered acid lift pump through a second suction pipe, and an outlet of the recovered acid lift pump is communicated with a regeneration utilization pipeline.
According to the technical scheme, the waste acid storage tank is provided with a control system, an induction type liquid level meter is arranged in the waste acid storage tank, a switching value signal is output to the control system, and the control system outputs and controls the waste acid lifting pump.
According to the preferable technical scheme, the first suction pipe, the feeding pipeline, the acid recovery pipeline and the concentrated polluted liquid discharge pipeline are formed by connecting PPR or PPH pipe fittings through hot melting welding.
Among the above-mentioned technical scheme, as required, can set up the diaphragm pressure gauge of full PP material, monitor the pressure in the pipeline. The contact part of the lift pump and the materials is made of PVC materials, can resist all types of inorganic acids, and the pressure can reach 15 kg.
Because of the application of the technical scheme, compared with the prior art, the utility model has the following advantages:
1. the utility model discloses a set up elementary filter and selectivity ion filter, can recycle about 80% acid, concentrate the pollutant in the spent acid to reduce its processing cost, the alkali that consumes in the follow-up processing only is about 20% of conventional processing mode;
2. the stainless steel reinforced membrane shell with the polytetrafluoroethylene lining can resist all inorganic strong acid including hydrofluoric acid, and has wide application range;
3. the utility model discloses a hot melt welded connection's PPR or PPH pipe fitting, the cooperation is to the selection of elevator pump and manometer for it is corrosion-resistant, long service life in whole return circuit.
Drawings
Fig. 1 is a schematic view of a connection structure according to an embodiment of the present invention.
Wherein: 1. an acid discharge pipeline; 2. a spent acid storage tank; 3. a first suction pipe; 4. a spent acid lift pump; 5. a first feed conduit; 6. a primary filter; 7. a second feed conduit; 8. a selective ion filter; 9. recovering the acid pipeline; 10. a concentrated contaminated liquid discharge pipeline; 11. a concentrated polluted liquid collecting tank; 12. a recycled acid storage tank; 13. a second suction pipe; 14. a recovery acid lift pump; 15. and (5) regenerating and utilizing the pipeline.
Detailed Description
The invention will be further described with reference to the following drawings and examples:
the first embodiment is as follows: referring to fig. 1, an apparatus for recycling inorganic waste acid comprises a waste acid storage tank 2, a waste acid lift pump 4, a primary filter 6, a selective ion filter 8, a concentrated contaminated liquid collecting tank 11, a recycled acid storage tank 12, a recycled acid lift pump 14, and corresponding connecting pipes and control valves.
In the embodiment, the selective ion filter 8 is composed of a selective ion filtering membrane and a membrane shell, wherein the selective ion filtering membrane is a non-glass fiber reinforced plastic wound sanitary nanofiltration membrane with a rhombic flow guide net, and the aperture is 1-2 nm; the membrane shell is a stainless steel reinforced membrane shell with a tetrafluoroethylene lining, and the pressure resistance of the membrane shell is more than 2 Mpa.
As shown in fig. 1, an acid discharge pipeline 1 of the production line is connected to a waste acid storage tank 2, a liquid outlet of the waste acid storage tank 2 is connected to a waste acid lift pump 4 through a first suction pipe 3, an outlet of the waste acid lift pump 4 is connected to a primary filter 6 through a first feeding pipeline 5, an outlet of the primary filter 6 is connected to a selective ion filter 8 through a second feeding pipeline 7, a filtrate of the selective ion filter 8 enters a recovered acid storage tank 12 through a recovered acid pipeline 9, a concentrate of the selective ion filter is connected to a concentrated contaminated liquid collecting tank 11 through a concentrated contaminated liquid discharge pipeline 10, an outlet of the recovered acid storage tank 12 is connected to a recovered acid lift pump 14 through a second suction pipe 13, and an outlet of the recovered acid lift pump 14 is communicated with a recycling pipeline 15.
The device of this embodiment can be established valve body, elevator pump etc. on each pipeline by the operator operation and carry out the operation, also can form the automatic control structure, sets up control system promptly, is equipped with induction type level gauge in spent acid hold up tank, output switching value signal to control system, sets up pressure instrument at each pipeline, output signal to control system, control system output control spent acid elevator pump, recovery acid elevator pump.
The device of the embodiment is applied to a certain electroplating plant, and the nitric acid in the zinc removing tank is purified and recovered. The concentration of nitric acid is 30%, and after the nitric acid is used for a certain time, a large amount of zinc nitrate and aluminum nitrate are accumulated, so that the using effect is influenced, and the nitric acid needs to be replaced again. The waste acid recovery equipment is used for filtering and recovering waste acid, and each batch is 3m3The waste acid was recovered at a treatment rate of 120L/h, and the treatment was completed in about 25 hours in total. The acid liquor is recovered by about 2.3m3Close to 80% recovery. 0.7m remained3The concentrated pollutants are changed into solid waste through alkali adjustment treatment, and compared with the original treatment mode, the alkali consumption is reduced by 80%, and the solid waste is reduced by 30%.
Claims (8)
1. The utility model provides a recovery regenerating unit of inorganic spent acid, includes spent acid holding vessel, its characterized in that: the waste acid recovery device is provided with a waste acid lifting pump, a primary filter, a selective ion filter, a concentrated polluted liquid collecting tank and a recovered acid storage tank, wherein the selective ion filter is composed of a selective ion filtering membrane and a membrane shell, a liquid outlet of the waste acid storage tank is connected with the waste acid lifting pump through a first suction pipe, an outlet of the waste acid lifting pump is connected to the primary filter through a first feeding pipeline, an outlet of the primary filter is connected with the selective ion filter through a second feeding pipeline, filtrate of the selective ion filter enters the recovered acid storage tank through a recovered acid pipeline, and concentrated liquid of the selective ion filter is connected to the concentrated polluted liquid collecting tank through a concentrated polluted liquid discharge pipeline.
2. The apparatus for recycling inorganic waste acid according to claim 1, wherein: the selective ion filtering membrane is a non-glass fiber reinforced plastic wound sanitary nanofiltration membrane, and the aperture is 1-2 nm.
3. The apparatus for recycling inorganic waste acid according to claim 2, wherein: the selective ion filtering membrane is provided with a rhombic flow guide net.
4. The apparatus for recycling inorganic waste acid according to claim 2, wherein: the membrane shell of the selective ion filter is a stainless steel reinforced membrane shell with a tetrafluoroethylene lining, and the pressure resistance of the membrane shell is more than 2 Mpa.
5. The apparatus for recycling inorganic waste acid according to claim 1, wherein: the range of the interception aperture of the primary filter is 0.1-10 mu m.
6. The apparatus for recycling inorganic waste acid according to claim 1, wherein: the outlet of the recovered acid storage tank is connected with a recovered acid lift pump through a second suction pipe, and the outlet of the recovered acid lift pump is communicated with a regeneration utilization pipeline.
7. The apparatus for recycling inorganic waste acid according to claim 1, wherein: the waste acid storage tank is internally provided with an induction type liquid level meter, a switching value signal is output to the control system, and the control system controls the waste acid lifting pump.
8. The apparatus for recycling inorganic waste acid according to claim 1, wherein: the first suction pipe, the feeding pipeline, the acid recovery pipeline and the concentrated polluted liquid discharge pipeline are formed by connecting PPR or PPH pipe fittings through hot melting welding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021066019.3U CN213294694U (en) | 2020-06-11 | 2020-06-11 | Inorganic waste acid recycling and regenerating device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021066019.3U CN213294694U (en) | 2020-06-11 | 2020-06-11 | Inorganic waste acid recycling and regenerating device |
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| CN213294694U true CN213294694U (en) | 2021-05-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114920374A (en) * | 2022-06-01 | 2022-08-19 | 江苏皕成环保科技有限公司 | Acid sludge and waste acid resource recycling and disposal equipment |
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- 2020-06-11 CN CN202021066019.3U patent/CN213294694U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114920374A (en) * | 2022-06-01 | 2022-08-19 | 江苏皕成环保科技有限公司 | Acid sludge and waste acid resource recycling and disposal equipment |
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