CN111434398A - Industrial waste salt treatment device and method - Google Patents
Industrial waste salt treatment device and method Download PDFInfo
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- CN111434398A CN111434398A CN201910032754.8A CN201910032754A CN111434398A CN 111434398 A CN111434398 A CN 111434398A CN 201910032754 A CN201910032754 A CN 201910032754A CN 111434398 A CN111434398 A CN 111434398A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
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Abstract
The invention provides an industrial waste salt treatment device and method. The device comprises: the pyrolysis unit is used for carrying out thermal decomposition treatment on the industrial waste salt to form a gas phase part and a solid phase part; the gas phase treatment unit is used for treating the gas phase part to obtain dischargeable flue gas; and the solid phase treatment unit is used for treating the solid phase part to obtain product salt, wherein the solid phase treatment unit is used for treating the solid phase part according to the composition of the industrial waste salt to obtain the product salt with different components. According to the invention, the industrial waste salt is pyrolyzed, so that melting points are avoided, and energy utilization and pipeline blockage prevention are facilitated; meanwhile, the solid phase part generated after pyrolysis is treated according to the industrial waste salt component of the incoming material to obtain the product salt with different components, the treatment object range of the industrial waste salt is effectively increased, and the gas phase part after pyrolysis is treated to form dischargeable smoke to be discharged into the air, so that the environmental pollution is avoided.
Description
Technical Field
The invention relates to the field of garbage treatment, in particular to an industrial waste salt treatment device and method.
Background
The industrial waste salt refers to various waste residues, dust and other wastes discharged in the industrial production process. In the process of producing organic and inorganic chemical products, production enterprises in the industrial field generate a large amount of dangerous wastes with high salt content, and the traditional dangerous waste incineration process cannot be directly treated due to the characteristics of easy coking and incombustibility. Meanwhile, the hazardous waste often has high water solubility, does not meet the standard of a landfill site, and often has the phenomenon that waste salt in a large-scale industrial park cannot be buried.
Therefore, the invention provides an industrial waste salt treatment device and method, which are used for solving the problems in the prior art.
Disclosure of Invention
In this summary, concepts in a simplified form are introduced that are further described in the detailed description. This summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In order to solve the problems in the prior art, the invention provides an industrial waste salt treatment device, which comprises:
the pyrolysis unit is used for carrying out thermal decomposition treatment on the industrial waste salt to form a gas phase part and a solid phase part;
the gas phase treatment unit is used for treating the gas phase part to obtain dischargeable flue gas;
and the solid phase treatment unit is used for treating the solid phase part to obtain product salt, wherein the solid phase treatment unit is used for treating the solid phase part according to the composition of the industrial waste salt to obtain the product salt with different components.
Illustratively, the solid phase processing unit comprises a quality analysis salt system, and the quality analysis salt system performs crystallization processing on a saline solution formed by the solid phase part according to the composition of the industrial waste salt.
Illustratively, the mass spectrometry salt system includes a freeze crystallization device and/or an evaporative crystallization device.
Illustratively, the solid phase treatment unit includes a waste salt collection device to configure the solid phase portion into the brine solution.
Illustratively, the solid phase treatment unit further comprises a low temperature plasma treatment unit for treating organic residues of the solid phase fraction during formation of the brine solution.
Illustratively, the solid phase treatment unit includes a measuring device for measuring a COD value of the brine solution, and when the COD value is higher than a set value, the brine solution in the waste salt device is introduced into the low temperature plasma treatment unit.
Illustratively, the gas phase treatment unit comprises a salt catching device, a secondary combustion chamber, a heat recovery device, a quenching tower, a comprehensive reactor, a bag-type dust remover, a washing tower and a chimney which are arranged in sequence.
The system further comprises a conveying device for conveying the solid-phase particles captured by the salt capturing device into the solid-phase processing unit for processing.
Illustratively, the solid phase treatment unit further comprises a multi-stage purification unit for performing a multi-stage purification treatment on the brine solution before the brine solution enters the quality analysis salt system.
The crushing device is used for crushing the industrial waste salt.
The invention also provides an industrial waste salt treatment method, which comprises the following steps:
obtaining industrial waste salt;
thermally decomposing the industrial waste salt to obtain a solid phase fraction and a gas phase fraction;
and respectively treating the gas phase part and the solid phase part to respectively obtain dischargeable flue gas and product salt, wherein the solid phase part is treated according to the composition of the industrial waste salt to obtain product salt with different compositions.
Illustratively, the step of treating the solid fraction comprises:
dissolving the solid phase portion to form an aqueous salt solution;
subjecting the brine solution to a quality analysis salt crystallization process to obtain product salts having different compositions.
Illustratively, the mass-separation salt crystallization treatment includes freeze crystallization and/or evaporative crystallization.
Illustratively, the brine solution is subjected to a multi-stage purification process prior to being subjected to a mass-separation salt crystallization process.
Illustratively, the brine solution is further subjected to a low temperature plasma treatment prior to being subjected to a mass-separation salt crystallization treatment.
Illustratively, the step of treating the solid phase portion further comprises measuring a COD value of the brine solution before the crystallization treatment, and performing the low-temperature plasma treatment on the brine solution when the COD value is higher than a set value.
Illustratively, the industrial waste salt is subjected to a crushing treatment before being subjected to thermal decomposition.
According to the device and the method for treating the industrial waste salt, the industrial waste salt is subjected to pyrolysis treatment, compared with treatment technologies such as melting and the like, a melting point is avoided, and energy utilization and pipeline blockage prevention are facilitated; meanwhile, the solid phase part generated after pyrolysis is treated according to the industrial waste salt component of the incoming material to obtain product salt with different components, the treatment object range of the industrial waste salt is effectively enlarged, and the gas phase part after pyrolysis is treated to form dischargeable smoke to be discharged into the air, so that the industrial waste salt is effectively treated, and the environmental pollution is avoided.
Drawings
The following drawings of the invention are included to provide a further understanding of the invention. The drawings illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.
In the drawings:
FIG. 1 is a block diagram of an industrial waste salt treatment apparatus according to an embodiment of the present invention;
FIG. 2 is a flow diagram of a method for treating industrial waste salt according to one embodiment of the present invention.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.
In order to provide a thorough understanding of the present invention, a detailed description will be given in the following description to illustrate the industrial waste salt treatment apparatus and method of the present invention. It will be apparent that the practice of the invention is not limited to the specific details known to those skilled in the art of waste treatment. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.
It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art. In the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same elements are denoted by the same reference numerals, and thus the description thereof will be omitted.
Example one
In order to solve the problems in the prior art, the invention provides an industrial waste salt treatment device, which comprises:
the pyrolysis unit is used for carrying out thermal decomposition treatment on the industrial waste salt to form a gas phase part and a solid phase part;
the gas phase treatment unit is used for treating the gas phase part to obtain dischargeable flue gas;
and the solid phase treatment unit is used for treating the solid phase part to obtain product salt, wherein the solid phase treatment unit is used for treating the solid phase part according to the composition of the industrial waste salt to obtain the product salt with different components.
The industrial waste salt treatment apparatus of the present invention is schematically described below with reference to fig. 1, in which fig. 1 is a block diagram of the structure of an industrial waste salt treatment apparatus according to an embodiment of the present invention.
Referring to fig. 1, an apparatus for treating industrial waste salt according to an embodiment of the present invention includes a pyrolysis unit for performing a thermal decomposition treatment on industrial waste salt to form a gas phase part and a solid phase part. Compared with the melting technology and the like, the pyrolysis avoids melting points, and has advantages in energy utilization and pipeline blockage prevention.
Illustratively, the industrial waste salt treatment device further comprises a crushing device for crushing the industrial waste salt. The industrial waste salt after the crushing treatment enters a pyrolysis device, so that the thermal decomposition reaction is more sufficient, and the efficiency of the industrial waste salt treatment is effectively improved. Illustratively, the industrial waste salt is first crushed before being treated by the industrial waste salt treatment device. Illustratively, the industrial waste salt firstly enters a storage bin and is conveyed to a crusher for crushing, the crushed waste salt is screened by a vibrating screen, and the crushed waste salt is conveyed to a pyrolysis unit of the industrial waste salt treatment device by a screw feeder after being weighed and measured by a weighing scale.
According to an example of the invention, the step of feeding the industrial waste salt into the pyrolysis unit for pyrolysis comprises preheating of the pyrolysis device, temperature rise of pyrolysis materials (industrial waste salt), and heating of pyrolysis feed materials (industrial waste salt) to the pyrolysis temperature under anaerobic conditions. Illustratively, the industrial waste salt is dehydrated when heated to the temperature of 100-150 ℃, the organic matter is evaporated when heated to the temperature of 380-150 ℃, and the cracking reaction is generated when heated to the temperature of 600-380 ℃. The cracking reaction produces a gas phase fraction comprising the oil and gas mixture and a solid phase fraction comprising the mixed salts.
With continued reference to FIG. 1, the industrial waste salt is processed through a pyrolysis unit to produce a solid phase portion and a gaseous phase portion. The gas phase part enters a gas phase treatment unit to finally form dischargeable flue gas. The solid phase part enters a solid phase treatment unit to finally form the product salt.
As shown in FIG. 1, the solid phase treatment unit comprises a mass spectrometry salt system. Illustratively, as shown in fig. 1, the quality analysis salt system includes a salt analysis system a for processing the solid phase portion to obtain sodium sulfate salt, a salt analysis system B for processing the solid phase portion to obtain sodium chloride and sodium nitrate salt, and a salt analysis system C for processing the solid phase portion to obtain potassium salt. And the quality analysis salt system crystallizes the solution formed by the solid phase part according to the composition of the industrial waste salt to obtain the product salt, thereby effectively increasing the range of treatment objects of the industrial waste salt.
Illustratively, the mass spectrometry salt system includes a freeze crystallization device and/or an evaporative crystallization device. Set up multiple crystallization device in the salt system is analysed to the quality, carry out different crystallization to different salt and handle, improved the acquisition efficiency of product salt, promoted the treatment effeciency of industry waste salt, effectively practiced thrift manufacturing cost.
Illustratively, the evaporative crystallization device is provided with a rectifying section, so that the crystallization efficiency of the evaporative crystallization device is further improved, and the treatment effect of ammonia salt can also be improved.
Illustratively, the solid phase treatment unit further comprises a waste salt collection device for preparing the solid phase part into a salt water solution. Illustratively, the waste salt collecting device utilizes the process water in the pyrolysis device to carry out the configuration of the saline solution, so that the water can be saved on the one hand, and the discharge of the process wastewater is solved on the other hand. It is to be understood that the configuration of the waste salt collecting device for the brine solution using the process water of the pyrolysis device is merely exemplary, and any process water in the garbage waste treatment process is applicable to the present invention.
Illustratively, the solid phase treatment unit further comprises a multi-stage purification unit for performing a multi-stage purification treatment on the brine solution before the brine solution enters the quality analysis salt system. The method has the advantages that the saline solution is subjected to multi-stage purification before being input into the quality analysis salt system for crystallization, impurities in the saline solution are reduced through multi-stage sedimentation and overflowing steps, the impurities are prevented from being separated out in the subsequent crystallization process and mixed into the product salt, and the effect of pre-purification is achieved on the product salt.
In an actual pyrolysis process, incomplete pyrolysis reaction often occurs, so that the saline solution configured by the waste salt collecting device often contains organic residues which cannot be processed by a subsequent quality analysis salt system, and in order to further improve the processing efficiency, the solid phase processing unit further comprises a low-temperature plasma processing unit for processing the organic residues of the solid phase part in the process of forming the solution. Illustratively, the efficiency of the treatment is further enhanced by cracking the organic residue by a sliding arc discharge plasma torch.
Illustratively, the solid phase treatment unit includes a measuring device for measuring a COD value of the brine solution, and when the COD value is higher than a set value, the brine solution in the waste salt device is introduced into the low temperature plasma treatment unit. COD (chemical oxygen demand) is an index for measuring the amount of reducing substances in water. The reducing substances in the water include various organic substances, nitrites, sulfides, ferrous salts and the like. But primarily organic. The efficiency of the pyrolysis reaction can be detected by measuring the COD value, thereby judging whether there is an organic residue in the brine solution that has not undergone an effective pyrolysis reaction. When the COD value is higher than the set value, the saline solution in the waste salt device enters the low-temperature plasma treatment unit, so that the transitional use of a low-temperature plasma treatment process can be avoided, the COD value directly enters a quality separation salt analysis system under the set value, the efficiency of crystallization salt analysis is effectively improved, and the capacity is maximized.
With continued reference to FIG. 1, the exemplary gas phase treatment unit includes, in order, a salt trap, a secondary combustion chamber, a heat recovery unit, a quench tower, an integrated reactor, a bag-type dust collector, a scrubber, and a stack. In the cracking process, part of salt particles often enter the gas phase treatment unit along with the gas phase part, and the salt capturing device is used for capturing solid phase particles in the gas phase part.
Illustratively, the industrial waste salt treatment device further comprises a conveying device for conveying the solid-phase particles captured by the salt capturing device into the solid-phase treatment unit for treatment. As shown in fig. 1, the solid-phase particles captured by the salt capturing device further enter a waste salt collecting device of the solid-phase processing unit through a conveying device, so that the waste salt collecting device processes the salt particles to obtain product salt, and the efficiency of industrial waste salt processing is further improved.
And the gas phase part treated by the salt catching device enters a secondary combustion chamber for combustion treatment, organic waste gas in the gas phase part is removed, high-temperature waste gas is formed and enters a heat recovery device for recovering latent heat therein, then enters a quench tower for cooling to form cooling gas, the cooling gas enters a comprehensive reactor for desulfurization and denitration treatment, then enters a bag-type dust remover for dust removal, and finally enters a washing tower for deacidification treatment, so that the discharged flue gas is discharged through a chimney.
Now, an exemplary description of an industrial waste salt processing apparatus according to an embodiment of the present invention has been completed, and according to the industrial waste salt processing apparatus of the present invention, a pyrolysis process is performed on an industrial waste salt, compared with a melting process and the like, a melting point is avoided, which is beneficial to energy utilization and pipeline blockage prevention, and meanwhile, a solid phase portion generated after the pyrolysis is selectively crystallized according to an industrial waste salt component of an incoming material to form a product salt, and different crystallization processes are performed for different salts, thereby effectively increasing a processing object range of the industrial waste salt. The gas phase part after pyrolysis is treated to form dischargeable flue gas to be discharged into the air, so that industrial waste salt is effectively treated, and environmental pollution is avoided.
Example two
The invention also provides an industrial waste salt treatment method which is carried out by adopting the industrial waste salt treatment device in the first embodiment. An industrial waste salt treatment method according to the present invention will be described below with reference to fig. 2.
First, referring to fig. 2, step S1 is performed: and obtaining industrial waste salt.
In order to reduce the amount of waste liquid, a heating and drying method is often adopted to evaporate salt-containing waste water to obtain solid waste salt, and the solid waste salt is transported to an industrial waste salt treatment device for treatment.
Next, with continued reference to fig. 2, step S2 is performed: the industrial waste salt is thermally decomposed to obtain a solid phase fraction and a gaseous phase fraction.
Illustratively, the industrial waste salt is first crushed before being treated by the industrial waste salt treatment device. Illustratively, the industrial waste salt firstly enters a storage bin and is conveyed to a crusher for crushing, the crushed waste salt is screened by a vibrating screen, and the crushed waste salt is conveyed to a pyrolysis unit of the industrial waste salt treatment device by a screw feeder after being weighed and measured by a weighing scale.
According to an example of the invention, the step of feeding the industrial waste salt into the pyrolysis unit for pyrolysis comprises preheating of the pyrolysis device, temperature rise of pyrolysis materials (industrial waste salt), and heating of pyrolysis feed materials (industrial waste salt) to the pyrolysis temperature under anaerobic conditions. Illustratively, the industrial waste salt is dehydrated when heated to the temperature of 100-150 ℃, the organic matter is evaporated when heated to the temperature of 380-150 ℃, and the cracking reaction is generated when heated to the temperature of 600-380 ℃. The cracking reaction produces a gas phase fraction comprising the oil and gas mixture and a solid phase fraction comprising the mixed salts.
Compared with the treatment technologies such as melting and the like, the method avoids melting points and is beneficial to energy utilization and pipeline blockage prevention.
Next, with continued reference to fig. 2, step S3 is performed: and respectively processing the gas phase part and the solid phase part to respectively obtain dischargeable flue gas and product salt, wherein the solid phase part is processed according to the composition of the industrial waste salt to obtain product salt with different compositions.
The solid phase part generated after pyrolysis is treated according to the industrial waste salt component of the incoming material to obtain product salt with different components, thereby effectively increasing the range of treatment objects of the industrial waste salt. The gas phase part after pyrolysis is treated to form dischargeable flue gas to be discharged into the air, so that industrial waste salt is effectively treated, and environmental pollution is avoided.
Illustratively, the step of treating the gas phase fraction comprises: the gas phase part firstly passes through a salt catching device to carry out salt catching treatment on the salt particles contained in the gas phase part, and the caught salt particles are further used in a solid phase treatment step so that the waste salt collecting device can treat the salt particles to obtain product salt, and the efficiency of industrial waste salt treatment is further improved. And the gas phase part treated by the salt catching device enters a secondary combustion chamber for combustion treatment, organic waste gas in the gas phase part is removed, high-temperature waste gas is formed and enters a heat recovery device for recovering latent heat therein, then enters a quench tower for cooling to form cooling gas, the cooling gas enters a comprehensive reactor for desulfurization and denitration treatment, then enters a bag-type dust remover for dust removal, and finally enters a washing tower for deacidification treatment, so that the discharged flue gas is discharged through a chimney.
Illustratively, the step of treating the solid fraction comprises: dissolving the solid phase portion to form an aqueous salt solution; subjecting the brine solution to a quality analysis salt crystallization process to obtain product salts of different compositions.
Illustratively, the mass-separation salt crystallization treatment includes freeze crystallization and/or evaporative crystallization. In actual production, industrial waste salts with different salt contents, such as sodium sulfate salt, sodium chloride, sodium nitrate salt, potassium salt and the like, are frequently present. According to one embodiment of the invention, the mass-analysis salt crystallization treatment is used for treating the solid phase part by different crystallization methods to respectively obtain sodium sulfate salt, sodium chloride and sodium nitrate salt and potassium nitrate salt, so that the crystallization treatment of the solution formed by the solid phase part is realized according to the composition of the industrial waste salt, the product salt is obtained, and the treatment object range of the industrial waste salt is effectively increased. Meanwhile, different crystallization treatments are carried out on different salts, so that the acquisition efficiency of product salt is improved, the treatment efficiency of industrial waste salt is improved, and the production cost is effectively saved.
Illustratively, the brine solution is subjected to a multi-stage purification process prior to being subjected to a mass-separation salt crystallization process. The method has the advantages that the saline solution is subjected to multi-stage purification before being input into the quality analysis salt system for crystallization, impurities in the saline solution are reduced through multi-stage sedimentation and overflowing steps, the impurities are prevented from being separated out in the subsequent crystallization process and mixed into the product salt, and the effect of pre-purification is achieved on the product salt.
In an actual pyrolysis process, incomplete pyrolysis reaction often occurs, so that the saline solution configured by the waste salt collecting device often contains organic residues which cannot be processed by a subsequent quality analysis salt system, and in order to further improve the processing efficiency, the saline solution is exemplarily subjected to low-temperature plasma processing before being subjected to quality analysis salt crystallization processing. For treating the organic residue of the solid phase part during the formation of the solution. Illustratively, the efficiency of the treatment is further enhanced by cracking the organic residue by a sliding arc discharge plasma torch.
Illustratively, the step of treating the solid phase portion further comprises measuring a COD value of the brine solution before the crystallization treatment, and performing the low temperature plasma treatment on the brine solution when the COD value is higher than a set value. COD (chemical oxygen demand) is an index for measuring the amount of reducing substances in water. The reducing substances in the water include various organic substances, nitrites, sulfides, ferrous salts and the like. But primarily organic. The efficiency of the pyrolysis reaction can be detected by measuring the COD value, thereby judging whether there is an organic residue in the brine solution that has not undergone an effective pyrolysis reaction. When the COD value is higher than the set value, the saline solution in the waste salt device enters the low-temperature plasma treatment unit, so that the transitional use of a low-temperature plasma treatment process can be avoided, the quality separation and salt crystallization treatment can be directly carried out when the COD value is below the set value, the efficiency of salt separation and crystallization is effectively improved, and the capacity is maximized.
According to an example of the invention, an industrial waste salt treatment plant receives 24 tons of industrial waste salt per day (sodium sulfate and sodium chloride account for 50% respectively), the received industrial waste salt firstly enters a crushing device to be crushed to obtain waste salt powder, then the waste salt powder is input into a pyrolysis unit to be pyrolyzed, organic matters in the waste salt are decomposed to be about 20% of total salt amount after thermal heat treatment, the pyrolyzed waste salt is subjected to the treatment, wherein a solid phase part enters a waste salt collecting device through a conveying device to be prepared into 20% -25% saline solution, then the COD value of the saline solution is measured, when the COD value is lower than 500 mg/L, the saline solution does not need to be subjected to further low-temperature plasma treatment and directly enters a multistage purification unit 14, after multistage sedimentation and filtration, the saline solution enters a salt separation system A of a mass salt separation system to be subjected to freezing crystallization to obtain mirabilite, and residues enter a salt separation system B to be subjected to evaporation crystallization to obtain sodium chloride.
In conclusion, according to the device and the method for treating the industrial waste salt, the industrial waste salt is subjected to pyrolysis treatment, compared with treatment technologies such as melting and the like, a melting point is avoided, energy utilization and pipeline blockage prevention are facilitated, meanwhile, a solid phase part generated after pyrolysis is treated according to industrial waste salt components of incoming materials to obtain product salt with different components, and the treatment object range of the industrial waste salt is effectively enlarged. The gas phase part after pyrolysis is treated to form dischargeable flue gas to be discharged into the air, so that industrial waste salt is effectively treated, and environmental pollution is avoided.
The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (17)
1. An industrial waste salt treatment device, characterized by comprising:
the pyrolysis unit is used for carrying out thermal decomposition treatment on the industrial waste salt to form a gas phase part and a solid phase part;
the gas phase treatment unit is used for treating the gas phase part to obtain dischargeable flue gas;
and the solid phase treatment unit is used for treating the solid phase part to obtain product salt, wherein the solid phase treatment unit is used for treating the solid phase part according to the composition of the industrial waste salt to obtain the product salt with different components.
2. The industrial waste salt treatment apparatus according to claim 1, wherein the solid phase treatment unit comprises a quality analysis salt system, and the quality analysis salt system performs crystallization treatment on the saline solution formed by the solid phase part according to the composition of the industrial waste salt.
3. The industrial waste salt treatment plant according to claim 2, wherein the quality analysis salt system comprises a freezing crystallization device and/or an evaporative crystallization device.
4. The industrial waste salt treatment plant of claim 2, wherein the solid phase treatment unit comprises a waste salt collection device to configure the solid phase portion into the brine solution.
5. The industrial waste salt treatment plant according to claim 4, wherein the solid phase treatment unit further comprises a low temperature plasma treatment unit for treating organic residues of the solid phase fraction during the formation of the brine solution.
6. The industrial waste salt treatment apparatus according to claim 5, wherein the solid phase treatment unit comprises a measuring device for measuring a COD value of the brine solution, and when the COD value is higher than a set value, the brine solution in the waste salt treatment apparatus is caused to enter the low temperature plasma treatment unit.
7. The industrial waste salt treatment device according to claim 1, wherein the gas phase treatment unit comprises a salt catching device, a secondary combustion chamber, a heat recovery device, a quenching tower, a comprehensive reactor, a bag-type dust remover, a washing tower and a chimney which are arranged in sequence.
8. The industrial waste salt treatment apparatus according to claim 7, further comprising a conveying device for conveying the solid phase particles captured by the salt capturing device into the solid phase treatment unit for treatment.
9. The industrial waste salt treatment plant of claim 2, wherein the solid phase treatment unit further comprises a multi-stage purification unit for performing a multi-stage purification treatment on the brine solution before the brine solution enters the quality analysis salt system.
10. The industrial waste salt treatment apparatus according to claim 1, further comprising a crushing apparatus for crushing the industrial waste salt.
11. A method for treating industrial waste salt is characterized by comprising the following steps:
obtaining industrial waste salt;
thermally decomposing the industrial waste salt to obtain a solid phase fraction and a gas phase fraction;
and respectively treating the gas phase part and the solid phase part to respectively obtain dischargeable flue gas and product salt, wherein the solid phase part is treated according to the composition of the industrial waste salt to obtain product salt with different compositions.
12. The method of claim 11, wherein the step of treating the solid phase fraction comprises:
dissolving the solid phase portion to form an aqueous salt solution;
subjecting the brine solution to a quality analysis salt crystallization process to obtain product salts having different compositions.
13. The industrial waste salt treatment process according to claim 12, wherein the mass-separation salt crystallization process comprises freeze crystallization and/or evaporative crystallization.
14. The method as claimed in claim 12, wherein the brine solution is further subjected to a multi-stage purification process before being subjected to a quality analysis salt crystallization process.
15. The method as claimed in claim 12, wherein the brine solution is further subjected to a low temperature plasma treatment before being subjected to a mass-separation salt crystallization treatment.
16. The industrial waste salt treatment method of claim 15, wherein the step of treating the solid phase part further comprises measuring a COD value of the brine solution before the crystallization treatment, and performing the low temperature plasma treatment on the brine solution when the COD value is higher than a set value.
17. The method as claimed in claim 11, wherein the industrial waste salt is crushed before being thermally decomposed.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111380060A (en) * | 2020-03-21 | 2020-07-07 | 深圳市海文环保技术有限公司 | Chemical waste salt harmless treatment system and method |
| CN114349027A (en) * | 2020-10-14 | 2022-04-15 | 重庆工商大学 | Method and device for removing organic matters in industrial waste salt by using low-temperature plasma |
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2019
- 2019-01-14 CN CN201910032754.8A patent/CN111434398A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111380060A (en) * | 2020-03-21 | 2020-07-07 | 深圳市海文环保技术有限公司 | Chemical waste salt harmless treatment system and method |
| CN114349027A (en) * | 2020-10-14 | 2022-04-15 | 重庆工商大学 | Method and device for removing organic matters in industrial waste salt by using low-temperature plasma |
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