CN211170907U - Refrigeration and iron removal recycling system for waste sulfuric acid - Google Patents
Refrigeration and iron removal recycling system for waste sulfuric acid Download PDFInfo
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- CN211170907U CN211170907U CN201922070849.7U CN201922070849U CN211170907U CN 211170907 U CN211170907 U CN 211170907U CN 201922070849 U CN201922070849 U CN 201922070849U CN 211170907 U CN211170907 U CN 211170907U
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Abstract
The utility model discloses a freezing deironing cyclic utilization system of spent sulfuric acid, include: the sulfuric acid pickling working pool is used for removing oxides on the surface of the steel wire base material; the waste acid temporary storage pool is used for receiving the acid liquor after the reaction in the sulfuric acid pickling working pool and carrying out cooling and precipitation treatment; the waste acid freezing deferrization device is used for receiving the acid liquor pumped by the waste acid temporary storage pool and cooling the acid liquor; and the regenerated acid temporary storage tank is used for receiving the acid liquor conveyed by the waste acid freezing deferrization device and carrying out heating treatment. The utility model discloses can carry out retreatment cyclic utilization to the spent acid, not only solve the problem that hazardous waste received and transported the processing, still can save social resource and manufacturing cost greatly.
Description
Technical Field
The invention relates to the technical field of steel wire production and processing, in particular to a waste sulfuric acid refrigeration iron removal recycling system.
Background
In the production process of the steel wire, the pickling for removing the oxide on the surface of the steel wire is a relatively common, mature and reliable process, a large amount of waste acid is generated after pickling treatment, the subsequent waste acid is high in transportation cost, and the environment is polluted due to improper treatment.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a waste sulfuric acid refrigeration iron removal recycling system which can be used for recycling waste acid, not only solves the problem of hazardous waste collection and transportation, but also greatly saves social resources and production cost.
The refrigeration and iron removal recycling system for the waste sulfuric acid provided by the embodiment of the invention comprises:
the sulfuric acid pickling working pool is used for removing oxides on the surface of the steel wire base material;
the waste acid temporary storage pool is used for receiving the acid liquor after the reaction in the sulfuric acid pickling working pool and carrying out cooling and precipitation treatment;
the waste acid freezing deferrization device is used for receiving the acid liquor pumped by the waste acid temporary storage pool and cooling the acid liquor;
and the regenerated acid temporary storage tank is used for receiving the acid liquor conveyed by the waste acid freezing deferrization device and carrying out heating treatment.
The refrigeration and iron removal recycling system for the waste sulfuric acid provided by the embodiment of the invention at least has the following beneficial effects: in the embodiment, the surface oxide of the steel wire base material is removed through the sulfuric acid pickling working pool, the ferrous sulfate content in the acid solution gradually increases along with the continuous reaction of the oxide, when the ferrous sulfate content is high, the pickling capacity is greatly weakened, so that the steel wire base material is discharged into the waste acid temporary storage pool to be cooled and precipitated, the waste acid subjected to cooling and precipitation is pumped to a waste acid freezing iron removal device, the waste acid solution is cooled to a lower temperature, so that ferrous sulfate crystals in the waste acid solution are separated out, at this time, the ferrous sulfate content can be reduced to a lower level, and the waste acid is conveyed to the regeneration acid temporary storage pool to be naturally heated to the. When the acid liquor is prepared, a certain amount of new sulfuric acid and water are added according to the process requirements, and the prepared acid liquor with the sulfuric acid content of 80-100g/l and the ferrous sulfate content of about 90-100g/l is used, so that the waste sulfuric acid can be recycled for unlimited times, and zero emission of the waste sulfuric acid is realized. And simultaneously, waste residues in the waste acid temporary storage pool are recycled by a hazardous waste company, and the generated ferrous sulfate crystals are recycled by a solid waste company. Therefore, the invention can recycle the waste acid, not only solves the problem of hazardous waste collection and transportation, but also greatly saves social resources and production cost.
According to some embodiments of the invention, the waste acid storage tank is used for storing the acid liquor, and the waste acid storage tank is used for storing the acid liquor.
According to some embodiments of the invention, the waste acid temporary storage tank is a solid-liquid separation filter tank and is also used for separating non-ferrous sulfate solids.
According to some embodiments of the invention, the cooling set temperature of the spent acid freeze iron removal plant is 3 ℃.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic diagram of a system for recycling spent sulfuric acid by freezing and deironing according to an embodiment of the present invention.
Reference numerals:
a sulfuric acid pickling working pool 100, a waste acid temporary storage pool 200, a waste acid freezing deferrization device 300 and a regenerated acid temporary storage pool 400.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
Referring to fig. 1, the system for recycling the waste sulfuric acid by freezing and deironing according to the embodiment of the invention comprises:
a sulfuric acid pickling working pool 100 for removing oxides on the surface of the steel wire base material;
the waste acid temporary storage pool 200 is used for receiving the acid liquor after the reaction in the sulfuric acid pickling working pool 100 and performing cooling and precipitation treatment;
the waste acid freezing deferrization device 300 is used for receiving acid liquor pumped by the waste acid temporary storage pool 200 and cooling the acid liquor;
and the regenerated acid temporary storage tank 400 is used for receiving the acid liquor conveyed by the waste acid freezing deferrization device 300 and carrying out heating treatment.
The refrigeration and iron removal recycling system for the waste sulfuric acid provided by the embodiment of the invention at least has the following beneficial effects: in this embodiment, the steel wire base material is cleaned of surface oxides by the sulfuric acid pickling tank 100, the ferrous sulfate content in the acid solution gradually increases with the continuous reaction of the oxides, when the ferrous sulfate is greater than or equal to 280g/l, the pickling capacity is greatly reduced, and the steel wire base material is discharged into the temporary waste acid storage tank 200 for cooling and precipitation, the cooled and precipitated waste acid is pumped to the waste acid deironing device 300, the waste acid solution is cooled to a lower temperature such as 3 ℃, so that ferrous sulfate crystals in the waste acid solution are precipitated, and at this time, the ferrous sulfate content is reduced to a lower level (about 110-120 g/l), and the waste acid is conveyed to the temporary regenerated acid storage tank 400 to be naturally heated to room temperature for. When the acid liquor is prepared, a certain amount of new sulfuric acid and water are added according to the process requirements, and the prepared acid liquor with the sulfuric acid content of 80-100g/l and the ferrous sulfate content of about 90-100g/l is used, so that the waste sulfuric acid can be recycled for unlimited times, and zero emission of the waste sulfuric acid is realized. Meanwhile, waste residues in the waste acid temporary storage pool 200 are recycled by a hazardous waste company, and generated ferrous sulfate crystals are recycled by a solid waste company. Therefore, the invention can recycle the waste acid, not only solves the problem of hazardous waste collection and transportation, but also greatly saves social resources and production cost.
According to some embodiments of the present invention, a transfer pump is further included, and the transfer pump is used for pumping the acid liquor in the waste acid temporary storage pool 200 to the waste acid freezing and iron removing device 300. In this embodiment, adopt the delivery pump to carry, improve conveying efficiency.
According to some embodiments of the present invention, the waste acid holding tank 200 is a solid-liquid separation filtration tank, and is also used for separating non-ferrous sulfate solids.
According to some embodiments of the present invention, the cooling set temperature of the spent acid chill iron removal apparatus 300 is 3 ℃.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (4)
1. The utility model provides a system for recycling iron in freezing of waste sulfuric acid, which is characterized in that includes:
the sulfuric acid pickling working pool is used for removing oxides on the surface of the steel wire base material;
the waste acid temporary storage pool is used for receiving the acid liquor after the reaction in the sulfuric acid pickling working pool and carrying out cooling and precipitation treatment;
the waste acid freezing deferrization device is used for receiving the acid liquor pumped by the waste acid temporary storage pool and cooling the acid liquor;
and the regenerated acid temporary storage tank is used for receiving the acid liquor conveyed by the waste acid freezing deferrization device and carrying out heating treatment.
2. The system for recycling waste sulfuric acid by refrigeration and iron removal as claimed in claim 1, wherein: still include the delivery pump, the delivery pump is used for with the acidizing fluid pump sending in the spent acid temporary storage pond is to among the spent acid deironing device that freezes.
3. The system for recycling waste sulfuric acid by refrigeration and iron removal as claimed in claim 1, wherein: the waste acid temporary storage tank is a solid-liquid separation filter tank and is also used for separating non-ferrous sulfate solids.
4. The system for recycling waste sulfuric acid by refrigeration and iron removal as claimed in claim 1, wherein: the cooling set temperature of the waste acid freezing deferrization device is 3 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922070849.7U CN211170907U (en) | 2019-11-26 | 2019-11-26 | Refrigeration and iron removal recycling system for waste sulfuric acid |
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| CN201922070849.7U CN211170907U (en) | 2019-11-26 | 2019-11-26 | Refrigeration and iron removal recycling system for waste sulfuric acid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110846669A (en) * | 2019-11-26 | 2020-02-28 | 鹤山恒基钢丝制品有限公司 | Waste sulfuric acid refrigeration iron removal recycling system and process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110846669A (en) * | 2019-11-26 | 2020-02-28 | 鹤山恒基钢丝制品有限公司 | Waste sulfuric acid refrigeration iron removal recycling system and process |
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