CN212442517U - Comprehensive treatment system for hazardous waste - Google Patents
Comprehensive treatment system for hazardous waste Download PDFInfo
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- CN212442517U CN212442517U CN202021416671.3U CN202021416671U CN212442517U CN 212442517 U CN212442517 U CN 212442517U CN 202021416671 U CN202021416671 U CN 202021416671U CN 212442517 U CN212442517 U CN 212442517U
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Abstract
The utility model relates to a hazardous waste comprehensive treatment system, which belongs to the field of hazardous waste treatment, and comprises a supercritical water gasification combined oxidation system for treating high-water-content waste, a rotary kiln high-temperature incineration system for treating solid and semi-solid waste and a high-temperature plasma treatment system for treating waste without calorific value and with low calorific value; a hydrogen-rich gas channel is communicated from the supercritical water gasification combined oxidation system to the rotary kiln high-temperature incineration system; a fly ash and residue channel is communicated from the rotary kiln high-temperature incineration system to the high-temperature plasma treatment system; a deacidification wastewater channel is communicated from the rotary kiln high-temperature incineration system to the supercritical water gasification combined oxidation system; a high-temperature flue gas channel is communicated from the high-temperature plasma treatment system to the rotary kiln high-temperature incineration system. Organically combines supercritical water treatment, incineration treatment and high-temperature plasma treatment technologies, and solves the problem that a single technology is difficult to meet the requirements of recycling, reducing and harmless comprehensive treatment of hazardous wastes.
Description
Technical Field
The utility model belongs to the technical field of hazardous waste handles, a hazardous waste integrated processing system is related to.
Background
Technologies commonly used for treating hazardous waste include incineration technology, plasma treatment technology, supercritical water treatment technology, and the like. The above three techniques each have advantages and disadvantages, and they are slightly different in suitability for processing objects. The supercritical water treatment technology is suitable for treating high-water-content waste, particularly organic waste, and when the supercritical water treatment technology is used for treating solid or semi-solid waste with low water content, although the conversion from low water content to high water content can be realized through dilution, the technology is not optimal through economic cost accounting. The types of hazardous wastes which can be treated by the incineration technology are wide and are relatively mature, but when high-water-content or low-calorific-value wastes are treated, the reduction, recycling and harmless treatment are difficult to realize by the incineration technology, and according to the current regulations of the ministry of environmental protection, incineration residues, fly ash and deacidification wastewater still belong to hazardous wastes and need to be safely buried or reprocessed. The plasma high-temperature treatment technology can completely convert the dangerous waste into the highly stable harmless glassy state slag, so that resource utilization is realized, particularly when the dangerous waste without or with low calorific value is treated, the technology has incomparable advantages, but when the dangerous waste with high calorific value or high volatility is treated, a subsequent treatment system which is the same as the incineration technology is needed, and the waste with high water content cannot be treated.
With the increasing amount and variety of hazardous wastes and the stricter and stricter environmental requirements, the single treatment technology for hazardous wastes has been difficult to satisfy the comprehensive treatment requirements of recycling, reducing and harmlessness of hazardous wastes, and when the single technology is adopted, secondary pollution is easily caused if the hazardous wastes are not properly treated.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing a hazardous waste comprehensive treatment system solves the problem that adopts alone and burns technology, plasma treatment technique and supercritical water treatment technique and be difficult to satisfy hazardous waste resourceization, minimizing, innoxious comprehensive treatment requirement.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a comprehensive treatment system for hazardous waste comprises a supercritical water gasification combined oxidation system for treating high-water-content waste, a rotary kiln high-temperature incineration system for treating solid and semi-solid waste and a high-temperature plasma treatment system for treating waste without and with low calorific value; a hydrogen-rich gas channel is communicated from the supercritical water gasification combined oxidation system to the rotary kiln high-temperature incineration system; a fly ash and residue channel is communicated from the rotary kiln high-temperature incineration system to the high-temperature plasma treatment system; a deacidification wastewater channel is communicated from the rotary kiln high-temperature incineration system to the supercritical water gasification combined oxidation system; a high-temperature flue gas channel is communicated from the high-temperature plasma treatment system to the rotary kiln high-temperature incineration system.
Further, the supercritical water gasification combined oxidation system comprises a high-water-content waste tank bin, a pretreatment device, a high-pressure pump, a supercritical water gasification combined oxidation reaction device and a liquid-solid separation device which are sequentially communicated; the liquid-solid separation device is respectively communicated with a water purification tank pool and a first recycling residue bin.
Further, a return channel is communicated from the water purification tank pool to the high-water-content waste tank bin, and the water purification tank pool is also provided with a drainage channel.
Further, the rotary kiln high-temperature incineration system comprises a solid and semi-solid waste tank bin, a rotary kiln, a secondary combustion chamber, a waste heat boiler and a post-treatment device which are sequentially communicated; the hydrogen-rich gas channel is communicated with the rotary kiln and the secondary combustion chamber from the supercritical water gasification combined oxidation reaction device respectively; the deacidification wastewater channel is communicated with the high-water-content waste tank bin from the post-treatment device.
Further, the post-treatment device is communicated with a discharge chimney.
Further, the high-temperature plasma treatment system comprises a non-calorific-value and low-calorific-value waste tank bin, a high-temperature plasma treatment device and a recycling residue bin II which are sequentially communicated; the fly ash and residue channel is respectively communicated with the high-temperature plasma treatment device from the second combustion chamber, the waste heat boiler and the post-treatment device; the high-temperature flue gas channel is communicated with the second combustion chamber from the high-temperature plasma processing device.
The beneficial effects of the utility model reside in that:
(1) the utility model discloses a combine supercritical water gasification allies oneself with oxidation treatment technique, rotary kiln high temperature to burn technique and high temperature plasma processing technique organically, realize dangerous discarded object minimizing, innoxious and resourceful treatment, finally realize the zero release. And the comprehensive property, adaptability and economical efficiency of treating the dangerous waste are improved.
(2) The utility model discloses a with the rich hydrogen gas of supercritical water treatment production to and the high temperature flue gas that plasma treatment produced are applied to among the incineration disposal, improve energy utilization, reduce the demand of purchasing the energy outward. Through the hydrogen-rich gas that uses supercritical water to handle production in incineration disposal, reduce the holistic hydrocarbon proportion of gas, and then reduced nitrogen oxide's production, reinforcing energy-conservation nature, economic nature and feature of environmental protection.
(3) The utility model discloses a deacidification waste water that will burn the processing production lets in supercritical water gasification and allies oneself with oxidation system, not only allies oneself with oxidation treatment system to supercritical water gasification and carries out the preliminary treatment quenching and tempering, utilizes supercritical water gasification to allie oneself with the organic matter of oxidation system in with deacidification waste water to carry out thorough processing simultaneously, reaches innocent treatment effect, avoids producing secondary pollution. The harmless and resource treatment of the residue and the fly ash generated in the incineration treatment is realized through a high-temperature plasma treatment system, and the secondary pollution is finally avoided.
(4) The utility model discloses a use high temperature flue gas with high temperature plasma processing system in rotary kiln high temperature burns the system, reduced high temperature plasma processing system's follow-up equipment to simplify the system, make equipment compacter.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
For the purposes of promoting a better understanding of the objects, features and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
fig. 1 is a schematic layout diagram of a hazardous waste comprehensive treatment system of the present invention.
Reference numerals: the system comprises a high-water-content waste tank bin 1, a pretreatment device 2, a high-pressure pump 3, a supercritical water gasification combined oxidation reaction device 4, liquid-solid substances 5, hydrogen-rich gas 6, purified water 7, resource residues 8, a liquid-solid separation device 9, a water purification tank 10, a resource residue bin I11, a solid and semisolid waste tank bin 12, a rotary kiln 13, a secondary combustion chamber 14, a waste heat boiler 15, a fuel recovery heat energy post-product 16, a post-treatment device 17, waste heat boiler residues 18, fly ash and residues 19, a discharge chimney 20, a non-calorific-value and low-calorific-value waste tank bin 21, a high-temperature plasma treatment device 22, secondary combustion chamber residues 23, a resource residue bin II 24, plasma resource residues 25, deacidification wastewater 26, discharge purified water 27 and reuse purified water 28.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in any way limiting the scope of the invention; for a better understanding of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
Referring to fig. 1, a comprehensive treatment system for hazardous waste includes a supercritical water gasification combined oxidation system for treating high water content waste, a rotary kiln high-temperature incineration system for treating solid and semi-solid waste, and a high-temperature plasma treatment system for treating waste with no calorific value and low calorific value.
Specifically, the supercritical water gasification combined oxidation system comprises a high-water-content waste tank bin 1, a pretreatment device 2, a high-pressure pump 3, a supercritical water gasification combined oxidation reaction device 4 and a liquid-solid separation device 9 which are sequentially communicated; the liquid-solid separation device 9 is respectively communicated with a water purification tank 10 and a first recycling residue bin 11. A return channel is communicated from the water purification tank 10 to the high-water-content waste tank bin 1, and the water purification tank 10 is also provided with a drainage channel.
The rotary kiln high-temperature incineration system comprises a solid and semi-solid waste tank bin 12, a rotary kiln 13, a secondary combustion chamber 14, a waste heat boiler 15 and a post-treatment device 17 which are sequentially communicated, wherein the post-treatment device 17 is communicated with a discharge chimney 20; the self-supercritical water gasification combined oxidation reaction device 4 is respectively communicated with a rotary kiln 13 and a secondary combustion chamber 14 to form a hydrogen-rich gas channel; a deacidification wastewater channel is communicated with the high-water-content waste tank bin 1 from the post-treatment device 17.
The high-temperature plasma treatment system comprises a non-calorific-value and low-calorific-value waste tank bin 21, a high-temperature plasma treatment device 22 and a second recycling residue bin 24 which are sequentially communicated; the second combustion chamber 14, the waste heat boiler 15 and the post-treatment device 17 are respectively communicated with the high-temperature plasma treatment device 22 to form a fly ash and residue channel; a high-temperature flue gas channel is communicated with the second combustion chamber 14 from the high-temperature plasma processing device 22.
The method for treating the hazardous waste by using the system comprises the following steps:
and (4) classified storage: dividing the dangerous waste into high-water-content waste, solid and semi-solid waste and non-calorific-value and low-calorific-value waste, and storing the waste in corresponding tank bins;
supercritical water treatment: high-water-content waste in a high-water-content waste tank bin 1 is pretreated by a pretreatment device 2, the high-water-content waste is boosted by a high-pressure pump 3 and then is introduced into a supercritical water gasification combined oxidation reaction device 4 for reaction, hydrogen-rich gas 6 generated by the reaction enters a rotary kiln high-temperature incineration system for use, liquid-solid substances 5 generated by the reaction are subjected to liquid-solid separation by a liquid-solid separation device 9, resource residues 8 are obtained from a resource residue bin I11 for subsequent resource utilization, purified water 7 is obtained from a water purification tank 10, one part of the purified water is used as recycled purified water 28 and is returned to the high-water-content waste tank bin 1 through a return channel, water recycling is realized, and the other part of the purified water is discharged through a drainage channel as discharged;
incineration treatment: solid and semi-solid waste in a solid and semi-solid waste tank bin 12 is pretreated and then is introduced into a rotary kiln 13 for primary combustion, then is introduced into a secondary combustion chamber 14 for secondary combustion, high-temperature flue gas generated after combustion enters a waste heat boiler 15 for heat energy recovery, a product 16 after heat energy recovery enters an after-treatment device 17 for treatment, wherein the generated deacidification wastewater 26 enters a high-water-content waste tank bin 1 through a deacidification wastewater channel, the deacidification wastewater is not only used for pretreatment tempering of a supercritical water gasification combined oxidation system, but also is used for decomposing organic matters in the deacidification wastewater 26, and the discharged standard-reaching flue gas is discharged through a discharge chimney 20; the hydrogen-rich gas 6 generated by the supercritical water gasification combined oxidation reaction device 4 is divided into two parts: one part is introduced into the rotary kiln 13 and the other part is introduced into the secondary combustion chamber 14.
Plasma treatment: introducing the waste without calorific value and with calorific value in a waste tank bin 21 without calorific value and with calorific value into a high-temperature plasma treatment device 22 for treatment, and introducing the residue 23 of the secondary combustion chamber 14, the residue 18 of the waste heat boiler 15 and the fly ash and the residue 19 generated by a post-treatment device 17 into the high-temperature plasma treatment device 22 through fly ash and residue channels for treatment respectively, and obtaining plasma resource residues 25 in a resource residue bin two 24 for subsequent resource utilization; the high-temperature flue gas generated by the high-temperature plasma processing device 22 enters the secondary combustion chamber 14 through the high-temperature flue gas channel for combustion and utilization.
By organically combining a supercritical water gasification combined oxidation treatment technology, a rotary kiln high-temperature incineration technology and a high-temperature plasma treatment technology, the reduction, harmless and recycling treatment of hazardous wastes is realized, and finally zero emission is realized. And the comprehensive property, adaptability and economical efficiency of treating the dangerous waste are improved.
Through the hydrogen-rich gas 6 that produces supercritical water treatment to and the high temperature flue gas that plasma treatment produced are applied to among the incineration disposal, improve energy utilization, reduce the demand of outsourcing the energy. Through the hydrogen-rich gas 6 that uses supercritical water to handle the production in incineration disposal, reduce the holistic hydrocarbon proportion of gas, and then reduced nitrogen oxide's production, reinforcing energy-conservation nature, economic nature and feature of environmental protection.
Through leading into supercritical water gasification allies oneself with oxidation system with deacidification waste water 26 that incineration disposal produced, not only carry out the preliminary treatment quenching and tempering to supercritical water gasification allies oneself with oxidation treatment system, utilize supercritical water gasification allies oneself with oxidation system to carry out thorough processing with the organic matter in the deacidification waste water 26 simultaneously, reach innocent treatment effect, avoid producing secondary pollution. The harmless and resource treatment of the residue and the fly ash generated in the incineration treatment is realized through a high-temperature plasma treatment system, and the secondary pollution is finally avoided.
The high-temperature flue gas of the high-temperature plasma treatment system is used in the high-temperature incineration system of the rotary kiln, so that the follow-up equipment of the high-temperature plasma treatment system is reduced, the system is simplified, and the equipment is more compact.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.
Claims (6)
1. A hazardous waste comprehensive treatment system is characterized in that: the system comprises a supercritical water gasification combined oxidation system for treating high-water-content waste, a rotary kiln high-temperature incineration system for treating solid and semi-solid waste and a high-temperature plasma treatment system for treating waste without and with low calorific values; a hydrogen-rich gas channel is communicated from the supercritical water gasification combined oxidation system to the rotary kiln high-temperature incineration system; a fly ash and residue channel is communicated from the rotary kiln high-temperature incineration system to the high-temperature plasma treatment system; a deacidification wastewater channel is communicated from the rotary kiln high-temperature incineration system to the supercritical water gasification combined oxidation system; a high-temperature flue gas channel is communicated from the high-temperature plasma treatment system to the rotary kiln high-temperature incineration system.
2. The hazardous waste integrated processing system of claim 1, wherein: the supercritical water gasification combined oxidation system comprises a high-water-content waste tank bin, a pretreatment device, a high-pressure pump, a supercritical water gasification combined oxidation reaction device and a liquid-solid separation device which are sequentially communicated; the liquid-solid separation device is respectively communicated with a water purification tank pool and a first recycling residue bin.
3. The hazardous waste integrated processing system of claim 2, wherein: a return channel is communicated from the water purification tank pool to the high-water-content waste tank bin, and a drainage channel is further arranged in the water purification tank pool.
4. The hazardous waste integrated processing system of claim 2, wherein: the rotary kiln high-temperature incineration system comprises a solid and semi-solid waste tank bin, a rotary kiln, a secondary combustion chamber, a waste heat boiler and a post-treatment device which are sequentially communicated; the hydrogen-rich gas channel is communicated with the rotary kiln and the secondary combustion chamber from the supercritical water gasification combined oxidation reaction device respectively; the deacidification wastewater channel is communicated with the high-water-content waste tank bin from the post-treatment device.
5. The hazardous waste integrated processing system of claim 4, wherein: the post-treatment device is communicated with a discharge chimney.
6. The hazardous waste integrated processing system of claim 4, wherein: the high-temperature plasma treatment system comprises a non-calorific-value and low-calorific-value waste tank bin, a high-temperature plasma treatment device and a recycling residue bin II which are sequentially communicated; the fly ash and residue channel is respectively communicated with the high-temperature plasma treatment device from the second combustion chamber, the waste heat boiler and the post-treatment device; and the high-temperature flue gas channel is communicated with the second combustion chamber from the high-temperature plasma treatment device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021416671.3U CN212442517U (en) | 2020-07-17 | 2020-07-17 | Comprehensive treatment system for hazardous waste |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021416671.3U CN212442517U (en) | 2020-07-17 | 2020-07-17 | Comprehensive treatment system for hazardous waste |
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| CN212442517U true CN212442517U (en) | 2021-02-02 |
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| CN202021416671.3U Active CN212442517U (en) | 2020-07-17 | 2020-07-17 | Comprehensive treatment system for hazardous waste |
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