CN108941153B - Inherent organic waste containing treatment and separation system based on supercritical water oxidation technology - Google Patents
Inherent organic waste containing treatment and separation system based on supercritical water oxidation technology Download PDFInfo
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- CN108941153B CN108941153B CN201810609786.5A CN201810609786A CN108941153B CN 108941153 B CN108941153 B CN 108941153B CN 201810609786 A CN201810609786 A CN 201810609786A CN 108941153 B CN108941153 B CN 108941153B
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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
Abstract
The invention discloses a treatment and separation system for wastes containing inherent machines based on a supercritical water oxidation technology, which comprises a pretreatment module for wastes containing solid, an oxidant supply module, a supercritical water oxidation module, a subsequent product cooling and pressure reduction module and a subsequent product on-line separation module. The solid waste is subjected to multistage crushing, screening and grinding through devices such as a screw conveyer, a crusher, a vibrating screen, an iron remover, a grinding pump and the like, so that the feeding requirement of supercritical water oxidation is met. Meanwhile, the quartz sand is added to grind the deposition salt possibly generated in the system, so that the problems of salt deposition and blockage of equipment such as a heat exchanger, a reactor and the like are avoided. For the gas-liquid-solid three-phase product after the reaction, a two-stage separation measure combining a three-phase separator and a liquid-solid two-phase separator is adopted, and meanwhile, the liquid phase separated by the liquid-solid separator is subjected to cyclic separation, so that the liquid-solid separation efficiency is improved, and meanwhile, the solid residue after the reaction can be used for making bricks, preparing ceramsite, selling and the like, so that the system economy is improved.
Description
Technical Field
The invention belongs to the field of treating solid-containing waste by a supercritical water oxidation technology, and relates to a treatment and separation system for solid-containing waste based on the supercritical water oxidation technology.
Background
In recent years, with the continuous development of the industry in China, the discharge amount of solid-containing waste is increased year by year, the solid-containing waste mainly comprises solid and semi-solid waste substances, such as slag, sludge, waste products and the like, and for inherent organic waste, the organic matter content is high, the organic matter types are various, the COD concentration is high, and meanwhile, toxic substances such as heavy metals and the like can be contained, and the toxic substances can also contain explosiveness, radioactivity, corrosiveness and the like, so that the solid-containing waste has serious harm to human beings and the environment. Most of the existing treatment methods for wastes containing inherent machines are incineration methods, which have a certain treatment effect, but when the incineration methods are used for treating the wastes containing the inherent machines, dioxin with strong toxicity can be generated, and secondary pollution such as oxysulfide, nitric oxide, fly ash and the like can also be generated; in addition, when the incineration method is used, auxiliary fuel needs to be added to maintain combustion, so that the system economy is reduced, and the treatment cost is high.
Supercritical Water Oxidation (SCWO) technology has significant advantages in the treatment of inherently organic-containing waste. The supercritical water oxidation technology utilizes the characteristic that nonpolar molecules such as oxygen, organic matters and the like can be completely dissolved in supercritical water under a supercritical condition, oxygen is used as an oxidant to react with the organic matters under the supercritical condition, a large amount of heat is released in the reaction process, and when the concentration of the organic matters reaches about 3 wt.%, the reaction system can maintain the reaction by utilizing the heat released by the reaction system, so that auxiliary fuel does not need to be added from the outside, and the operation cost of the system is reduced. Meanwhile, the supercritical water oxidation technology has the advantages of high reaction rate and high organic matter efficiency, and toxic organic matters can be degraded into CO in extremely short reaction time2、N2、H2O and other small molecular compounds, and secondary pollutants such as dioxin, oxysulfide, nitric oxide and the like can not be generated in the reaction process, and the treatment process has no peculiar smell and does not need a subsequent gas device. After solid-containing waste is treated by supercritical water oxidation technology, heavy metal can be stabilized and stabilized in solid-phase residue, and simultaneously, the volume reduction and the quantification of the solid-containing waste can be realized.
However, when supercritical water oxidation technology is used for treating the waste containing inherent organic matters, the problems are also existed:
(1) the solid waste is mostly solid, semi-solid and other waste materials, the solid waste does not have fluidity, the solid waste is difficult to transport by directly using power devices such as pumps, and when the solid waste is treated by using a supercritical water oxidation continuous device, the solid waste needs to be properly pretreated.
(2) If the solid waste contains massive hard foreign matters and the like, when the solid waste enters the continuous supercritical water oxidation system, equipment can be damaged, so that the system directly goes wrong during operation, and the safety and the reliability of the system are seriously influenced.
(2) Due to the special properties of solid-containing waste, such as containing insoluble inert solids, etc., the solid-containing waste is easy to deposit and block when transported in a supercritical water oxidation system. Meanwhile, due to the special property of supercritical water, the solubility of the supercritical water to inorganic salt is extremely low, when the salt content in solid waste is high, the inorganic salt is crystallized and precipitated under the action of the supercritical water, finally, the deposition and blockage of the salt can occur in equipment, the safe operation of the system is influenced, and meanwhile, the degradation efficiency of reactants is reduced.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a treatment and separation system for wastes containing inherent organisms based on a supercritical water oxidation technology, which can effectively solve the problems of pretreatment, salt deposition, blockage and the like in the process of treatment of the wastes containing solid by the supercritical water oxidation technology, efficient separation and resource utilization of solid products after treatment and the like.
In order to achieve the purpose, the invention adopts the following technical scheme to realize the purpose:
the system comprises a solid waste pretreatment module, an oxidant supply module, a supercritical water oxidation module, a subsequent product cooling and pressure reduction module and a subsequent product on-line separation module; the method comprises the following steps that sludge containing solid waste is pretreated by a solid waste pretreatment module and then enters a solid waste pretreatment module, and the preheated sludge enters a supercritical water oxidation module to be mixed and reacted with an oxidant conveyed by an oxidant supply module; and the product after the reaction is cooled by the subsequent product cooling and pressure reducing module and then enters the subsequent product on-line separation module for three-phase separation.
The invention further improves the following steps:
the solid waste containing pretreatment module comprises a solid waste containing material bin, a softened water tank and a quartz sand bin; an outlet of the solid waste material containing bin is connected with the crusher through a first screw conveyer; the softened water tank is connected with the solid waste containing blending tank through a softened water pump; the outlet of the solid waste containing blending tank is sequentially connected with a vibrating screen, a screw pump, an iron remover, a grinding pump and a solid waste containing buffer tank; the foreign matter outlet of the vibrating screen is connected with the slag storage tank; and a second screw conveyor passing through the quartz sand bin is connected with the buffer tank containing solid wastes.
The preheating module containing solid wastes comprises a material pump and a heat exchanger, after pretreatment is completed, materials are conveyed to an inlet of an inner pipe of the heat exchanger through the material pump and are preheated in the heat exchanger, hot fluid of an outer pipe of the heat exchanger is derived from high-temperature fluid after supercritical water oxidation reaction, and fresh materials enter a material inlet of the supercritical water oxidation module through an outlet of the inner pipe of the heat exchanger after preheating of the inner pipe of the heat exchanger.
The supercritical water oxidation module is a supercritical water oxidation reactor, a material inlet of the supercritical water oxidation reactor is connected with an outlet of an inner pipe of the heat exchanger, an oxidant inlet is connected with an oxidant supply module, an outlet hot fluid is communicated with an inlet of an outer pipe hot fluid of the heat exchanger, and the hot fluid after heat exchange enters the subsequent product cooling and pressure reduction module through an outlet of an outer pipe of the heat exchanger.
The oxidant supply module comprises a liquid oxygen storage tank, an outlet of the liquid oxygen storage tank is sequentially connected with a liquid oxygen pump, a liquid oxygen gasifier and an oxygen buffer tank, and an outlet of the oxygen buffer tank is connected with an oxidant inlet of the supercritical water oxidation reactor.
The subsequent product cooling and pressure reducing module comprises a steam generator and a cooling water tank; an outlet of the outer pipe of the heat exchanger enters a hot fluid inlet in the steam generator to be connected; the cooling water tank is connected with the steam generator through a cooling water pump; the steam generator is connected with the subsequent product on-line separation module through a pressure reducing valve.
The subsequent product on-line separation module is connected with the three-phase separator, the subsequent liquid phase treatment device and the subsequent solid phase treatment device; an outlet of the pressure reducing valve is connected with the three-phase separator, the gas phase which reaches the standard and is separated by the three-phase separator is directly discharged, the liquid phase enters a subsequent liquid phase processing device, a solid phase outlet is sequentially connected with a solid phase product bin, a third screw conveyor and a centrifugal machine, a liquid phase outlet which is centrifuged by the centrifugal machine is sequentially connected with a material returning tank and a material returning pump, and an outlet of the material returning pump is connected with a material returning inlet of the three-phase separator; and (4) feeding the dry solid residue of the centrifuge into a subsequent solid phase treatment device for recovering the solid residue.
Compared with the prior art, the invention has the following beneficial effects:
the invention utilizes supercritical water oxidation technology to harmlessly treat solid waste, pretreats the solid waste, thoroughly breaks and breaks the solid waste by adopting a multi-stage mode of breaking up, crushing and removing foreign matters, simultaneously properly mixes the solid waste, and circumferentially and radially mixes the solid waste by adopting a frame type and impeller type stirrer, so that the subsequent transportation and treatment conditions of the system can be met, and the continuous transportation and distribution capacity of the system is improved.
Furthermore, the quartz sand is added in front of the heat exchanger which is easy to deposit and block, and by utilizing the characteristics of hardness and wear resistance of the quartz sand, solid particles such as deposited salt and the like which possibly exist in the heat exchanger and the reactor are taken away under the condition that the material flow rate is greater than the critical settling flow rate, so that the problems of solid particle deposition, blocking and the like which possibly occur in equipment such as the heat exchanger, the reactor and the like are avoided.
Furthermore, the reactor used in the invention is an internal thread tubular reactor, compared with the traditional tubular reactor, the internal thread tube can enhance the turbulence intensity of fluid in the reactor, enhance the heat exchange and the degradation efficiency of solid waste, and simultaneously avoid the salt deposition in the reactor due to the disturbance of the fluid, thereby improving the safety and reliability of the system.
Furthermore, the invention improves the gas-liquid-solid separation by adopting a three-phase separator, adopts the combination of two-stage separation technology of gas-liquid-solid three-phase separation and liquid-solid separation, and simultaneously circulates the liquid-phase product after liquid-solid separation, so that the water content of the separated solid-phase product is lower, and the separation efficiency is greatly improved.
Furthermore, the supercritical water oxidation treatment system for the solid-containing waste not only realizes the reasonable utilization of heat, but also generates steam by using the redundant heat generated in the reaction process, and the generated steam is used for industry or sale; meanwhile, the harmless solid phase components after the reaction realize on-line separation and are mainly used for making bricks, preparing ceramic granules or selling. The reasonable utilization of the two resources greatly reduces the system running cost and improves the system economy.
Drawings
FIG. 1 is a schematic view of a reaction system of the present invention.
Wherein: 1-solid waste material containing bin; 2-a first screw conveyor; 3-a crusher; 4-a solid waste-containing blending tank; 5-softening the water tank; 6-softening the water pump; 7-stirring the mixture; 8-vibrating screen; 9-a slag storage tank; 10-screw pump; 11-a de-ironing separator; 12-a grinding pump; 13-a buffer tank containing solid waste; 14-a material pump; 15-a heat exchanger; 16-supercritical water oxidation reactor; 17-a liquid oxygen storage tank; 18-liquid oxygen pump; 19-liquid oxygen gasifier; 20-an oxygen buffer tank; 21-a steam generator; 22-cooling water tank; 23-a cooling water pump; 24-a pressure relief valve; 25-a three-phase separator; 26-solid phase product silo; 27-a third screw conveyor; 28-subsequent liquid phase treatment device; 29-centrifuge; 30-material returning tank; 31-a feed back pump; 32-a subsequent solid phase treatment device; 33-quartz sand silo; 34-second screw conveyor.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, the system for treating and separating organic waste containing solids based on supercritical water oxidation technology comprises a solid waste containing pretreatment module, an oxidant supply module, a supercritical water oxidation module, a subsequent product cooling and pressure reduction module and a subsequent product on-line separation module.
In this system, the connection of the devices is as follows:
contain 1 export in solid waste material storehouse and 2 imports of first screw conveyer and link to each other, 2 exports in first screw conveyer link to each other with 3 imports of breaker, 3 exports in breaker link to each other with containing 4 material imports of solid waste allotment jar, soften 5 exports in the water pitcher and soften 6 imports of water pump and link to each other, it links to each other with containing 4 demineralized water imports of solid waste allotment jar to soften 6 exports of water pump, it links to each other with 8 imports of shale shaker to contain 4 exports in the solid waste allotment jar, 8 exports in shale shaker and 10 imports of screw pump link to each other, 11 exports in screw pump link to each other with deironing ware 11 imports, 11 exports in deironing ware link to each other with 12 imports of grinding pump, 12 exports link to each other with containing solid waste buffer tank 13 exports in grinding pump 12, 33 exports in quartz sand storehouse and 34 imports. The outlet of the buffer tank 13 containing solid wastes is connected with the inlet of a material pump 14, the outlet of the material pump 14 is connected with the inlet of an inner tube of a heat exchanger 15, and the outlet of the inner tube of the heat exchanger 15 is connected with the material inlet of a supercritical water oxidation reactor 16.
The outlet of the liquid oxygen storage tank 17 is connected with the inlet of a liquid oxygen pump 18, the outlet of the liquid oxygen pump 18 is connected with the inlet of a liquid oxygen gasifier 19, the outlet of the liquid oxygen gasifier 19 is connected with the inlet of an oxygen buffer tank 20, and the outlet of the oxygen buffer tank 20 is connected with the oxygen inlet of a supercritical water oxidation reactor 16.
16 export of supercritical water oxidation reactor product links to each other with the 15 outer pipe hot-fluid import of heat exchanger, and the 15 outer pipe hot-fluid export of heat exchanger links to each other with 21 import of steam generator product, and 21 export of steam generator product links to each other with the import of reducing valve 24, and the export of cooling water tank 22 links to each other with 23 imports of cooling water pump, and 23 exports of cooling water pump link to each other with 21 cooling water import of steam generator, and steam generator 21 produces steam for industrial device or sell outward.
The outlet of the pressure reducing valve 24 is connected with the product inlet of the three-phase separator 25, the gas phase of the three-phase separator 25 is discharged to the air, the liquid phase outlet of the three-phase separator 25 is connected with the subsequent liquid phase processing device 28, the solid phase outlet of the three-phase separator 25 is connected with the inlet of the solid phase product bin 26, the outlet of the solid phase product bin 26 is connected with the inlet of the third screw conveyer 27, the outlet of the third screw conveyer 27 is connected with the inlet of the centrifuge 29, the liquid phase outlet of the centrifuge 29 is connected with the inlet of the material returning tank 30, the outlet of the material returning tank 30 is connected with the inlet of the material returning pump 31, the outlet of the material returning pump 31 is connected with the material returning inlet of the three-phase separator 25.
In this embodiment, the supercritical water oxidation technology is used for treating sludge-like waste containing inherent organic substances, and the pretreatment module and the subsequent product on-line separation module for waste containing inherent organic substances are described in detail:
when the system is started, the system is filled with softened water, the temperature of the system is gradually increased through an external electric heater, the system is gradually increased in pressure after the temperature is increased, the system is gradually increased in temperature and pressure to a supercritical state, and preparation before the system is started is well made.
When the system normally operates, sludge containing solid wastes is placed in a solid waste material bin 1, the sludge is quantitatively conveyed into a crusher 3 through a first screw conveyor 2, a blade is arranged on a conveying screw at the rear half part of the first screw conveyor 2, foreign matters such as large sludge, bricks and the like are subjected to primary shearing crushing, the sludge subjected to shearing crushing enters the crusher 3, the sludge is subjected to secondary crushing, the sludge is further scattered, the sludge subjected to secondary crushing enters a solid waste containing blending tank 4, blending and homogenizing are performed in the solid waste containing blending tank 4, a softened water outlet in a softened water tank 5 is connected with an inlet of a softened water pump 6, the softened water required by blending the sludge is quantitatively conveyed into the solid waste containing blending tank 4 through the softened water pump 6, the amount of softened water required to be added is determined according to the initial water content of the sludge, the sludge is blended to about 90 percent of water content, the material pump has fluidity, and meets the conveying requirement of a subsequent material pump. Meanwhile, the stirrer 7 is arranged in the solid waste-containing blending tank 4, the stirrer 7 is in a frame type combined impeller type, and the combination of the stirrer 7 and the impeller can ensure that the sludge blending tank is uniformly stirred in the circumferential direction and the radial direction, so that the sludge is prevented from settling and gathering. The sludge after blending and homogenizing directly enters a vibrating screen 8, under the vibration separation action of the vibrating screen 8, some metal foreign matters such as bolts and the like which are not easy to break are separated from the sludge with good fluidity, the screened foreign matters are placed in a slag storage tank 9 for subsequent treatment and placement, the sludge is subjected to third-level screening treatment in the vibrating screen 8, the screened sludge is connected with an inlet of a screw pump 10 and is conveyed into an iron remover 11 by the screw pump 9, ferromagnetic impurities mixed in the sludge are further finely removed in the iron remover 11, the safe and normal work of mechanical equipment such as a grinder in a subsequent conveying system is ensured, the sludge after ferromagnetic impurities are removed enters a subsequent grinding pump 12, the sludge is ground until the particle size of the sludge is between 30 and 40 nm. The ground sludge enters a buffer tank 13 containing solid waste. Meanwhile, a proper amount of quartz sand is added into the buffer tank 13 containing the solid wastes, the quartz sand is conveyed into the buffer tank 13 containing the solid wastes from a quartz sand bin 33 by a second screw conveyor 34 and is mixed with the sludge, and the added amount of the quartz sand meets the condition that the flow rate of the mixed materials is greater than the critical settling velocity in the system. The material that does not contain impurity and mobility are good after the preliminary treatment is accomplished is carried heat exchanger 15 inner tube import via material pump 14, and the material preheats in heat exchanger 15, and heat-transfer fluid comes from the high-temperature fluid after the supercritical water oxidation reaction in heat exchanger 15 outer tube, and fresh material enters into 16 material imports of reactor through heat exchanger 15 inner tube export after the heat exchanger 15 inner tube preheats the completion.
The oxidant in the reaction system is oxygen which is derived from the gasification of liquid oxygen. The outlet of the liquid oxygen storage tank 17 is connected with the inlet of a liquid oxygen pump 18, the outlet of the liquid oxygen pump 18 conveys liquid oxygen into a liquid oxygen gasifier 19, the liquid oxygen is gasified into oxygen under the action of air in the liquid oxygen gasifier, the outlet of the liquid oxygen gasifier 19 is connected with an oxygen buffer tank 20, the gasified oxygen is stored in the oxygen buffer tank 20, and the oxygen outlet on the oxygen buffer tank 20 is connected with the oxidant inlet of the reactor 16.
Mud and oxygen after preheating carry out mixing reaction in supercritical water oxidation reactor 16, and 16 inside internal threads that are equipped with of reactor have strengthened the turbulent intensity of reaction fluid greatly under the effect of internal thread for the degradation that the reactant can be more thorough, simultaneously, under the dual function of the disturbance of internal thread and quartz sand, salt deposit blocking phenomenon that can appear in the reaction process has been avoided. Meanwhile, due to the fact that a large amount of heat is released in the reaction process, the system can be maintained to be in the supercritical state to normally operate without adding extra fuel in the reaction process. One part of the hot fluid after the reaction is used for preheating fresh materials, and the other part of the hot fluid is used for producing steam for sale. Hot fluid at the outlet of the reactor 16 is connected with a hot fluid inlet of an outer pipe of the heat exchanger 15, the hot fluid heats fresh materials in the inner pipe at the outer pipe of the heat exchanger 15, the hot fluid after heat exchange enters a coil hot fluid inlet in the steam generator 21 through an outlet of the outer pipe of the heat exchanger 15, cooling water in the steam generator 21 is sourced from an external cooling water tank 22, the hot fluid is conveyed to a cold water inlet of the steam generator through a cooling water pump 23, generated steam is used for industry or sold outside, an outlet of the coil in the steam generator 21 is connected with an inlet of a pressure reducing valve, and reaction products after temperature reduction enter the.
The low temperature and low pressure product from the outlet of the pressure reducing valve 24 enters a three phase separator 25. The gas phase which reaches the standard and is separated by the three-phase separator 25 is directly discharged aloft, the liquid phase enters a subsequent liquid phase processing device 28, if the gas phase reaches the standard and is discharged or other utilization modes, the separated solid phase is discharged into a solid phase product bin 26 through a slag discharge port at the bottom of the three-phase separator 25, the outlet of the solid phase product bin 26 is connected with the inlet of a third spiral conveyor 27, the outlet of the third spiral conveyor 27 is connected with the material inlet of a centrifugal machine 29, because the separated solid phase product still has certain moisture, two-stage separation is adopted here, the liquid phase which is centrifuged by the centrifugal machine 29 enters a material return tank 30, in order to avoid that the liquid phase still contains partial residue, the separated liquid phase is conveyed to the material return inlet of the three-phase separator 25 through a material return pump 31 to carry out the circulation separation of the liquid phase product, and the dry solid residue which is centrifuged by the centrifugal machine 29 enters a subsequent, the solid residue is recycled, or used for making bricks, preparing ceramic granules, directly selling, and the like.
The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (4)
1. The treatment and separation system for wastes containing inherent machines based on the supercritical water oxidation technology is characterized by comprising a pretreatment module for wastes containing solids, an oxidant supply module, a supercritical water oxidation module, a subsequent product cooling and depressurizing module and a subsequent product on-line separation module; the method comprises the following steps that sludge containing solid waste is pretreated by a solid waste pretreatment module and then enters a solid waste pretreatment module, and the preheated sludge enters a supercritical water oxidation module to be mixed and reacted with an oxidant conveyed by an oxidant supply module; the product after reaction is cooled by a subsequent product cooling and pressure reducing module and then enters a subsequent product on-line separation module for three-phase separation;
the solid waste containing pretreatment module comprises a solid waste containing material bin (1), a softened water tank (5) and a quartz sand bin (33); an outlet of the solid waste material containing bin (1) is connected with a crusher (3) through a first screw conveyer (2); the softened water tank (5) is connected with the solid waste containing blending tank (4) through a softened water pump (6); the outlet of the solid waste containing blending tank (4) is sequentially connected with a vibrating screen (8), a screw pump (10), an iron remover (11), a grinding pump (12) and a solid waste containing buffer tank (13); a foreign matter outlet of the vibrating screen (8) is connected with a slag storage tank (9); a second screw conveyor (34) which passes through the quartz sand bin (33) is connected with a buffer tank (13) containing solid wastes;
the preheating module containing the solid waste comprises a material pump (14) and a heat exchanger (15), after pretreatment is finished, the material is conveyed to an inlet of an inner pipe of the heat exchanger (15) through the material pump (14), preheating is carried out in the heat exchanger (15), hot fluid of an outer pipe of the heat exchanger (15) comes from high-temperature fluid after supercritical water oxidation reaction, and after preheating of the inner pipe of the heat exchanger (15), fresh material enters a material inlet of the supercritical water oxidation module through an outlet of the inner pipe of the heat exchanger (15);
the supercritical water oxidation module is supercritical water oxidation reactor (16), and the material import of supercritical water oxidation reactor (16) links to each other with heat exchanger (15) inner tube export, and the module is supplied with to oxidant import, and the export hot-fluid is linked together with the outer tube hot-fluid import of heat exchanger (15), and the hot-fluid after the heat transfer gets into follow-up product cooling depressurization module through heat exchanger (15) outer tube export.
2. The supercritical water oxidation technology-based inherent organic waste treatment and separation system according to claim 1, characterized in that the oxidant supply module comprises a liquid oxygen storage tank (17), the outlet of the liquid oxygen storage tank (17) is connected with a liquid oxygen pump (18), a liquid oxygen gasifier (19) and an oxygen buffer tank (20) in sequence, and the outlet of the oxygen buffer tank (20) is connected with the oxidant inlet of the supercritical water oxidation reactor (16).
3. The supercritical water oxidation technology-based inherent organic waste-containing processing and separating system according to claim 1, characterized in that the subsequent product temperature and pressure reduction module comprises a steam generator (21), a cooling water tank (22); an outlet of an outer pipe of the heat exchanger (15) enters a hot fluid inlet of the steam generator (21) to be connected; the cooling water tank (22) is connected with the steam generator (21) through a cooling water pump (23); the steam generator (21) is connected with the subsequent product on-line separation module through a pressure reducing valve (24).
4. The supercritical water oxidation technology-based inherent organic waste treatment and separation system as claimed in claim 3, characterized in that the follow-up product on-line separation module comprises a three-phase separator (25), a follow-up liquid phase treatment device (28) and a follow-up solid phase treatment device (32) in connection; an outlet of the pressure reducing valve (24) is connected with a three-phase separator (25), the gas phase which reaches the standard and is separated by the three-phase separator (25) is directly discharged, the liquid phase enters a subsequent liquid phase processing device (28), a solid phase outlet is sequentially connected with a solid phase product bin (26), a third screw conveyor (27) and a centrifugal machine (29), a liquid phase outlet which is centrifuged by the centrifugal machine (29) is sequentially connected with a material returning tank (30) and a material returning pump (31), and an outlet of the material returning pump (31) is connected with a material returning inlet of the three-phase separator (25); the dry solid residue of the centrifuge (29) enters a subsequent solid phase processing device (32) for recovering the solid residue.
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| CN110790466B (en) * | 2019-09-24 | 2020-08-18 | 西安交通大学 | Supercritical hydrothermal flame enhanced supercritical water oxidation organic waste treatment system and regulation and control method |
| CN111781014B (en) * | 2020-06-26 | 2021-07-06 | 西安交通大学 | Online sampling system and method based on supercritical water oxidation technology |
| CN111762866A (en) * | 2020-06-26 | 2020-10-13 | 西安交通大学 | Multifunctional supercritical water enhanced oxidation system for refractory nitrogenous and high-salinity organic pollutants |
| CN112844346A (en) * | 2020-12-31 | 2021-05-28 | 成都九翼环保科技有限公司 | Supercritical hydrothermal powdered activated carbon regeneration device and method |
| CN113003887A (en) * | 2021-03-18 | 2021-06-22 | 西安交通大学 | High-concentration nitrogen-containing organic wastewater denitrification device based on biochemical-supercritical water oxidation coupling technology |
| CN114685021A (en) * | 2022-04-07 | 2022-07-01 | 西安交通大学 | Supercritical water oxidation multi-stage treatment system and method for organic waste |
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| WO1992021621A1 (en) * | 1991-06-03 | 1992-12-10 | Abb Lummus Crest Inc. | Method for suspercritical water oxidation |
| DE10135318A1 (en) * | 2001-07-19 | 2003-01-30 | Bayer Ag | Process for removing deposits from chemical reactors |
| CN202947520U (en) * | 2012-10-31 | 2013-05-22 | 上海海亮铜业有限公司 | Rifled tube |
| CN105600914B (en) * | 2016-03-10 | 2018-09-04 | 西安交通大学 | A kind of indirect heat exchange type supercritical water oxidation system of organic liquid waste and sludge |
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