A leachate concentrate coordinated superenthalpy combustion evaporation treatment device and method

Abstract

The present invention discloses a leachate concentrate coordinated super-enthalpy combustion evaporation treatment device and method. It includes a combustion chamber, an evaporation chamber and a heat exchange tube. A high-efficiency heat transfer medium layer is arranged at the upper end of the combustion chamber to accelerate the heat transfer to the evaporation chamber. The inner wall is provided with components such as a smoke outlet and a thermocouple. The intermediate air intake device contains multiple structures. The gas-liquid nozzle inputs part of the atomized concentrate and air into the combustion chamber under pressure, and generates eddy currents and turbulence effects with the mixed combustible gas to enhance the gas-liquid mixing effect. The discharge electrode and the outer electrode form an inter-electrode discharge covered by the medium, and a large amount of plasma is generated to assist combustion, so as to realize the coordinated super-enthalpy combustion and rapid flash evaporation of dried flowers by part of the concentrate. The evaporation chamber receives heat from the combustion chamber to promote the evaporation and drying of the concentrate. The waste heat utilization unit can effectively utilize the waste heat of steam and the waste heat of super-enthalpy combustion flue gas to preheat the concentrate and the mixed gas, increase the enthalpy value, and further accelerate the evaporation of the concentrate and the coordinated super-enthalpy combustion rate while saving energy, thereby improving the treatment efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of garbage leachate treatment and disposal, and specifically relates to a leachate concentrate coordinated super-enthalpy combustion evaporation treatment device and method. Background Art

[0002] The annual output of landfill leachate in my country reaches more than 30 million tons. The composition of landfill leachate is complex, with high concentration of organic pollutants, high chroma, strong odor, high ammonia nitrogen, and may also contain heavy metal ions and toxic and harmful substances. At home and abroad, the composite treatment process of pretreatment (flocculation sedimentation, biochemical treatment) + deep treatment (UF, NF, RO, DTRO, etc.) is mainly used for landfill leachate. Membrane treatment is currently the most widely used deep treatment technology in China, accounting for more than 60% of the total landfill leachate treatment. However, membrane treatment will produce leachate concentrate, which has more complex components, contains a large amount of humus and other difficult-to-degrade organic matter, and contains inorganic salt ions, calcium and magnesium ions and heavy metal ions, with high hardness and conductivity, making it more difficult to treat and dispose of. Therefore, although membrane technology has become more mature, and the water production rate and concentration multiples of membrane systems have been continuously improved, the disposal of leachate concentrate after leachate membrane treatment has become a bottleneck in the application of membrane technology. At present, domestic leachate concentrate treatment and disposal mostly adopts reinjection method or evaporation concentration method. The reinjection method has low treatment cost and simple operation, but multiple cycles of reinjection will cause the accumulation of salt, heavy metals and difficult-to-degrade organic matter in the leachate, increasing the difficulty of subsequent leachate treatment. Evaporation concentration method is an effective method of volume reduction treatment and disposal. This method can be used to precipitate salt crystals and recover them without pollutant discharge. In practical applications, it has the advantages of small footprint, high water production and zero pollutant discharge. The commonly used evaporation methods of leachate concentrate in China include: submerged combustion evaporation, machine evaporation and recompression, and negative pressure evaporation.

[0003] The structure of submerged combustion evaporation is complex, prone to corrosion, has a short service life, a long evaporation time, low energy efficiency, low thermal efficiency, and is difficult to operate and maintain; the machine evaporation and recompression disposal method has a large energy loss, high equipment cost, specific requirements for materials, and potential safety hazards. In addition, the effective temperature difference of the evaporator is small and the heat exchange area is large, which requires the use of a rising film or falling film evaporator; negative pressure evaporation needs to be operated under a vacuum state, and the system sealing requirements are high. If the seal is not tight, air will enter the system, which will affect the heat transfer efficiency and evaporation effect. In addition, negative pressure evaporation is usually carried out at a lower temperature, and the heat transfer coefficient is relatively low. The same evaporation amount requires a larger heat transfer area, and the system structure is complex, and repair and maintenance are difficult. Therefore, it is urgent to develop a concentrated liquid evaporation treatment device and method with high thermal efficiency, short evaporation time, high heat exchange efficiency, and simple operation and maintenance.

[0004] In order to improve the heat exchange and treatment efficiency of the evaporation and drying process of landfill leachate concentrate and realize the rapid reduction treatment of landfill leachate concentrate, the present invention utilizes super-enthalpy combustion high-temperature evaporation crystallization and combines it with the concentrated liquid synergistic super-enthalpy combustion flash drying treatment, and fully utilizes the waste heat generated by the operation of the device to preheat the gas and liquid to increase their enthalpy value. A leachate concentrate synergistic super-enthalpy combustion evaporation treatment device has been developed. The device has a simple structure, high thermal efficiency, high energy efficiency, short evaporation time, long service life, only produces a small amount of residue, and the salt crystals precipitated by evaporation can be recycled, thereby realizing efficient reduction treatment and disposal of leachate concentrate. Summary of the invention

[0005] The purpose of the present invention is to provide a device and method for treating leachate concentrate by coordinated super-enthalpy combustion evaporation in order to solve the above-mentioned problems.

[0006] The technical scheme adopted by the present invention is as follows: a leachate concentrate coordinated super-enthalpy combustion evaporation treatment device and method, including a combustion chamber, an evaporation chamber and a heat exchange tube, a high-efficiency heat transfer medium layer is arranged at the upper end of the interior of the combustion chamber, and the inner wall of the combustion chamber is provided with a symmetrical flue gas outlet, a furnace thermocouple, an igniter, a cylindrical outer electrode, and a cylindrical outer electrode quartz protective layer; an air intake device is arranged in the middle of the combustion chamber, four rows of symmetrical mixed combustion gas nozzles are arranged at the upper end of the air intake device, four rows of symmetrical annular discharge electrodes are arranged on the outer wall, four rows of symmetrical pre-mixed gas nozzles are arranged at the lower end, and a rectifier is arranged at the bottom and connected to the mixed gas pipeline; two symmetrical gas-liquid nozzles, a quartz bottom plate and a slag discharge hole are arranged at the lower part of the combustion chamber, one end of the quartz bottom plate is provided with heat-resistant asbestos, and a slag discharge valve is arranged at the end of the quartz bottom plate opposite to the heat-resistant asbestos, the output end of the slag discharge valve is provided with the input end of the ash slag collecting tank, and one end of the flue gas outlet is provided with a smoke exhaust pipe flange.

[0007] By adopting the above technical solution, the efficient heat transfer medium layer is used as the key medium for heat conduction. It can quickly and evenly distribute the heat in the combustion chamber, so that the leachate concentrate can quickly obtain sufficient heat during evaporation and drying, accelerate the evaporation process, and improve the processing efficiency. At the same time, the stable thermal environment is conducive to the full combustion reaction, reducing incomplete combustion products, and promoting the smooth realization of synergistic super-enthalpy combustion and flash drying. Flue gas outlet and exhaust pipe flange The flue gas outlet bears the heavy responsibility of timely discharging the high-temperature flue gas generated by combustion, which is indispensable for maintaining the stable pressure in the combustion chamber and ensuring continuous combustion. The exhaust pipe flange facilitates the connection between the flue gas outlet and the exhaust pipe, ensures the sealing and stability of the flue gas emission system, prevents flue gas leakage, and ensures the safe and efficient operation of the entire system. The thermocouple in the furnace monitors the temperature in the combustion chamber in real time, providing key data for operators to accurately control the combustion reaction process. With these data, combustion parameters such as fuel supply and air intake can be accurately adjusted to ensure that the combustion is always in the best state, achieve efficient and stable combustion and evaporation and drying process, and prevent abnormal conditions such as overheating from causing damage to the equipment. As the starting device of the combustion reaction, the igniter can provide initial energy, ignite the mixed gas of the mixed combustible gas and the leachate concentrate, and start the entire combustion process. It is the primary link for the normal operation of the system, ensuring that the subsequent super-enthalpy combustion, evaporation and crystallization processes can be carried out in an orderly manner. The cylindrical outer electrode and the annular discharge electrode work together to generate plasma in the combustion chamber when the pulse voltage is applied. The active substances in the plasma greatly increase the combustion reaction rate and combustion temperature, realize the super-enthalpy combustion of low-concentration combustible gas and leachate concentrate, and allow the concentrate to flash dry quickly, improve the processing efficiency, and reduce pollutant emissions. The outer electrode quartz protective layer provides physical protection for the outer electrode to prevent it from being damaged under high temperature, high pressure and complex chemical environment, extend the service life of the outer electrode, ensure the stability of the discharge process, and then ensure the continuous stability of the plasma combustion-supporting effect, and maintain the normal operation of the entire combustion system. The mixed combustion gas nozzle and the front mixed gas nozzle are responsible for accurately delivering the mixed combustible gas to the combustion chamber to ensure that it is in full contact with the leachate concentrate and provide the necessary fuel for the combustion reaction. The rectifier rectifies the incoming mixed gas to stabilize the airflow and optimize the combustion effect. The mixed gas pipeline is not only a conveying channel for the mixed gas, but its spiral winding structure with the superheated steam pipe can also use the heat of the superheated steam to preheat the mixed gas, increase the enthalpy value of the combustible gas, meet the super-enthalpy combustion preheating requirements, and promote the improvement of combustion efficiency. The gas-liquid nozzle evenly sprays the mixed gas and liquid of the leachate concentrate and air after the negative pressure self-absorption of air in the Venturi tube into the combustion chamber, so that the gas and liquid are fully mixed to form a good dispersion effect, which is conducive to the plasma medium barrier discharge, accelerates the combustion reaction, and realizes the efficient synergistic super-enthalpy combustion and rapid flash drying of the concentrated liquid.Quartz base plate, heat-resistant asbestos, slag discharge valve and ash collection tank The quartz base plate provides bottom support for the combustion chamber, and the heat-resistant asbestos provides insulation protection to prevent excessive heat loss and protect the base plate from high temperature damage. The solid residue after combustion is naturally deposited on the quartz base plate under the action of gravity. The slag discharge valve is opened regularly, and these residues enter the ash collection tank through the slag discharge valve, which is convenient for centralized collection and subsequent treatment, maintaining the cleanliness of the combustion chamber and ensuring the continuous and stable operation of the system.

[0008] In a preferred embodiment, a scraper, an evaporation chamber slag discharge groove, a slag discharge spiral device, a drive motor, a sealing sleeve and a slag discharge pipe are provided at the bottom of the evaporation chamber; concentrated liquid water inlet pipes are symmetrically connected on both sides, and an air collecting hood is provided at the upper end, which is connected to the saturated steam pipe, the generator set impeller and the superheated steam pipe.

[0009] By adopting the above technical solution, when the scraper drives the slag discharge spiral device to rotate by the driving motor, the crystalline solid at the bottom of the evaporation chamber is scraped and sent to the slag discharge trough, and the slag discharge spiral device further transmits it to the slag discharge pipe for discharge. The sealing sleeve ensures sealing when the slag discharge device stops to prevent leakage of the concentrated liquid. This combination effectively realizes solid-liquid separation, discharges solid residues, and maintains the normal operation of the evaporation chamber. The slag discharge trough of the evaporation chamber serves as a temporary collection area for the scraper to transport the crystalline solid, which facilitates the slag discharge spiral device to discharge the solids in an orderly manner to avoid the accumulation of residues affecting the evaporation efficiency and equipment operation. The concentrated liquid inlet pipe is symmetrically arranged on both sides of the evaporation chamber to ensure that the leachate concentrate enters the evaporation chamber evenly and stably, so that the concentrated liquid is evenly distributed in the evaporation chamber, which is conducive to the efficient heat transfer and evaporation process. The gas collecting hood, saturated steam pipe, generator impeller and superheated steam pipe The gas collecting hood collects the saturated steam generated by evaporation, transports it through the saturated steam pipe, and drives the impeller of the generator set to rotate and generate electricity. The generated electricity is used to reheat the steam through a resistance wire to form superheated steam. The superheated steam is used to preheat the air and mixed combustible gas. At the same time, some volatile and semi-volatile organic matter in the saturated steam is removed, realizing energy recovery and pollutant elimination, and improving the energy efficiency and environmental protection of the system.

[0010] In a preferred embodiment, the air intake device inputs the combustible mixed gas through the front mixed gas nozzle and the mixed combustion gas nozzle, and the gas-liquid nozzle is connected to the gas-liquid mixing pipe, the venturi tube, the concentrate pressurizing pipe and the secondary pressurizing pump in sequence.

[0011] By adopting the above technical solution, the front mixed gas nozzle and the mixed combustion gas nozzle serve as the key channels for the combustible mixed gas to enter the combustion chamber. They can spray the precisely adjusted and preheated combustible mixed gas into the combustion chamber evenly and stably, ensuring that the mixed gas is fully in contact with the leachate concentrate and air in the combustion chamber, providing suitable fuel conditions for the combustion reaction, and promoting the efficient combustion reaction. The secondary booster pump pressurizes part of the leachate concentrate through the concentrate pressure pipe, so that it forms a negative pressure in the venturi tube, thereby self-priming air into the concentrate to achieve preliminary mixing of air and concentrate. The mixed gas and liquid are then further mixed evenly through the gas-liquid mixing pipe, and finally the gas-liquid nozzle sprays the evenly mixed gas and liquid into the combustion chamber with a good atomization effect. This series of components work together to ensure that the leachate concentrate is fully mixed with the air, forming a mixed gas and liquid that is conducive to combustion, improving the combustion efficiency, and promoting the synergistic super-enthalpy combustion and rapid flash drying of the concentrate. At the same time, this method can also make the combustion more complete, reduce pollutant emissions, and improve the treatment effect of the entire device on the leachate concentrate.

[0012] In a preferred embodiment, the mixed gas draws air by a vortex blower, and the gas volume is controlled by a connected air intake valve to enter the gas mixer through a gas flowmeter. In addition, the combustible gas is transferred to the gas pipe through a gas bottle, and then enters through a connected pressure reducing valve through a gas flowmeter. After the combustible gas and air are fully mixed, they enter the mixed gas pipeline. An air intake pipe is provided at one end of the vortex blower, a flowmeter is provided at the lower end of the gas mixer, a pressure gauge is provided at one end of the mixed gas pipeline, and an insulation layer is provided on the outside of the mixed gas pipeline.

[0013] By adopting the above technical solution, the vortex fan is used as a power source to extract air through the air intake pipe to provide the necessary oxygen for the combustion reaction. Its stable operation can ensure the continuity and stability of the air supply, meet the demand for oxygen in the combustion process, and enable the combustion reaction to proceed smoothly. The intake valve accurately controls the amount of air entering the gas mixer, and cooperates with the gas flow meter to achieve precise regulation and real-time monitoring of the air intake. This helps to accurately control the air ratio according to the combustion requirements, optimize the combustion effect, improve the combustion efficiency, and ensure the safety and stability of the system operation. The gas cylinder stores the combustible gas, and the gas pipe transports it to the gas mixer. The pressure reducing valve reduces the pressure of the combustible gas so that its pressure meets the requirements of the combustion system and ensures safe and stable gas supply. The gas flow meter accurately measures the gas flow entering the gas mixer, which is convenient for accurate proportioning with the air volume, ensuring that the mixed gas reaches the ideal combustion conditions and achieves efficient and stable combustion. The gas mixer fully mixes the air and combustible gas so that the two are evenly distributed to form a mixture suitable for combustion. The flow meter monitors the flow of mixed gas and provides flow data to the operator so that the intake valve and pressure reducing valve can be further adjusted to achieve precise control of the flow and ratio of the mixed gas and ensure that the combustion reaction is carried out in the best state. The mixed gas pipeline serves as a conveying channel for the mixed gas to transport the mixed gas to the combustion chamber. The barometer monitors the air pressure in the pipeline in real time to ensure that the mixed gas enters the combustion chamber at a suitable pressure to prevent abnormal pressure from affecting the combustion effect or equipment safety. The insulation layer reduces the heat loss of the mixed gas during transportation and maintains the temperature of the mixed gas, which helps to improve the combustion efficiency. At the same time, it avoids the safety hazards caused by the excessively high temperature of the outer wall of the pipeline, ensuring the safe and efficient operation of the system.

[0014] In a preferred embodiment, a generator impeller is disposed at one end of the evaporation chamber, a motor group is disposed at one end of the generator impeller, and a resistance wire is disposed at one side of the motor group.

[0015] By adopting the above technical solution, the saturated steam generated in the evaporation chamber is used to generate electricity through the impeller of the generator set and the generator set, and the generated electricity is used to reheat the steam through the resistance wire to obtain superheated steam of 450℃~850℃.

[0016] In a preferred embodiment, a bottom scraper is provided on one side of the interior of the evaporation chamber, and a slag discharge spiral device is provided on the bottom scraper through a rotating shaft, an input end of a slag discharge trough of the evaporation chamber is provided on the output end of the drive motor, an insulating protective layer is provided on one end of the drive motor, an input end of a slag discharge pipe is provided on the output end of the evaporation chamber slag discharge trough, and a sealing sleeve is connected to the slag discharge spiral device.

[0017] By adopting the above technical scheme, the evaporation chamber utilizes the high temperature generated by super-enthalpy combustion to quickly evaporate and crystallize, the bottom scraper rotating shaft and the spiral rod of the slag discharge spiral device are connected by gears, the output end of the driving motor is provided with the input end of the evaporation chamber slag discharge trough, one end of the driving motor is provided with a thermal insulation protective layer, the output end of the evaporation chamber slag discharge trough is provided with the input end of the slag discharge pipe, and the slag discharge spiral device is connected with a sealing sleeve.

[0018] In a preferred embodiment, the superheated steam pipe and the high-temperature flue gas exhaust pipe are connected to a flue gas filter, the flue gas filter is connected to an axial flow fan, a rain cap is provided on the top, a condensate outlet is provided at one end of the superheated steam pipe, and a drain valve is provided at one end of the condensate outlet.

[0019] By adopting the above technical solution, the superheated steam pipe transports the superheated steam generated in the evaporation chamber to the flue gas filter. In this process, the superheated steam can preheat other components, realize heat recovery and utilization, and improve energy utilization. The high-temperature flue gas exhaust pipe guides the high-temperature flue gas generated in the combustion chamber to the flue gas filter. The high-temperature flue gas is filtered before being discharged to remove particulate matter and harmful gases therein, reducing pollution to the environment. The two are connected to the flue gas filter to ensure that the steam and flue gas in the system are purified before being discharged, which meets environmental protection requirements. When the axial flow fan is running, negative pressure is formed in the superheated steam pipe and the high-temperature flue gas exhaust pipe. For the superheated steam pipe, the negative pressure prompts the saturated steam generated in the evaporation chamber to quickly enter the superheated steam pipe for subsequent power generation and heat exchange processes, while ensuring that the superheated steam can be discharged in time to avoid steam accumulation in the system causing pressure increase, affecting system safety and operation efficiency. For the high-temperature flue gas exhaust pipe, the negative pressure causes the high-temperature flue gas generated by combustion to be quickly discharged from the combustion chamber, ensuring that the pressure in the combustion chamber is stable, which is conducive to the continuous combustion reaction, and at the same time accelerates the flue gas to enter the flue gas filter for purification. Installed on the top of the final exhaust pipe, the rain cap can prevent rainwater from entering the exhaust pipe and flue gas filter and other equipment. Rainwater entering may cause corrosion and damage to the equipment, affecting the normal operation of the system. The rain cap effectively protects the equipment from rainwater erosion, extends the service life of the equipment, and ensures the stable operation of the system. In the superheated steam pipe, the steam will partially condense to form condensate during the transmission and heat exchange process. The condensate outlet provides a discharge channel for the condensate, and the drain valve controls the discharge of the condensate. Opening the drain valve regularly can discharge the condensate accumulated in the superheated steam pipe, avoid the accumulation of condensate in the pipe, affect the steam flow and heat exchange efficiency, and even cause pipe corrosion or other failures, to ensure the normal operation of the system.

[0020] In a preferred embodiment, a water inlet pump is provided on one side of the evaporation chamber, a concentrated liquid water inlet pipe is provided at one end of the water inlet pump, a water inlet valve is provided at one end of the concentrated liquid water inlet pipe, saturated steam in the evaporation chamber enters the superheated steam pipes symmetrically arranged on both sides from the saturated steam pipe through the guide device, a guide device is provided at one end of the resistance wire, an insulation layer is provided outside the heat exchange tube, and a superheated steam pipe thermocouple is provided at one end of the insulation layer.

[0021] By adopting the above technical solution, the leachate concentrate is pumped into the concentrate inlet pipe by the water inlet pump, the water inlet valve is opened, the leachate concentrate enters the evaporation chamber, and the saturated steam generated in the evaporation chamber enters the superheated steam pipes symmetrically arranged on both sides through the saturated steam pipe through the diversion device. The saturated steam drives the impeller of the generator set to rotate and generates electricity through the generator set. The generated electricity is used to reheat the saturated steam through the resistance wire to form superheated steam. The superheated steam thermocouple can monitor the steam temperature in real time, and the superheated steam is used to preheat the air and the mixed combustible gas. An insulation layer is set outside the heat exchange tube.

[0022] In a preferred embodiment, a high-temperature flue gas exhaust pipe is provided at one end of the axial flow fan, a smoke exhaust port is provided on one side of the high-temperature flue gas exhaust pipe, a smoke filter is provided at one end of the smoke exhaust port, a high-temperature flue gas exhaust pipe is provided on the outer surface of the concentrate water inlet pipe, and an insulation layer is provided on the outside of the concentrate water inlet pipe.

[0023] By adopting the above technical scheme, due to the operation of the axial flow fan, negative pressure is formed in the high-temperature flue gas exhaust pipe, and the high-temperature flue gas generated by the super-enthalpy combustion in the furnace enters the high-temperature flue gas exhaust pipe through the flue gas exhaust port through negative pressure self-suction, and is then filtered through the flue gas filter and finally discharged by the axial flow fan. At the same time, the high-temperature flue gas exhaust pipe is spirally wound around the concentrate inlet pipe, and an insulation layer is provided on the outside.

[0024] A leachate concentrate collaborative superenthalpy combustion evaporation treatment device and method, comprising the following steps:

[0025] Step 1, super-enthalpy combustion process: after the combustible gas and air are fully mixed by the gas mixer, they are preheated by the mixed gas pipeline, exchanged with the mixed gas pipeline and flow through the rectifier, and the combustible mixed gas enters the superheated steam pipe and the mixed gas pipeline of the combustion chamber from the front mixed gas nozzle and the mixed combustion gas nozzle. In addition, the 10%-30% leachate concentrate after preheating and heat exchange with the concentrated liquid pressurizing pipe and the air mixed gas-liquid enters the combustion chamber from the gas-liquid nozzle, and the mixed combustible gas, air, and atomized concentrated liquid gas generate eddy current and turbulence, and the gas-liquid mixing effect is better. By applying a pulse voltage, the annular discharge electrode and the outer electrode form an inter-electrode discharge covered by the dielectric, and the dielectric barrier discharge of the plasma is performed, and a large amount of plasma is ionized to assist combustion, so as to realize the coordinated super-enthalpy combustion treatment of the concentrated liquid and the combustible mixed gas;

[0026] Step 2, efficient heat exchange process: the concentrate is preheated by the waste heat of the high-temperature flue gas generated by the super-enthalpy combustion in the combustion chamber, and the concentrate water inlet pipe and the concentrate pressure pipe are heat exchanged by the spirally wound high-temperature flue gas exhaust pipe; the air intake pipe and the mixed gas pipeline are spirally wound on the superheated steam pipe, and the saturated steam generated by the evaporation process of the leachate concentrate is preheated by the superheated steam formed by secondary heating. The energy for heating the superheated steam is generated by saturated steam power generation, and the high-temperature flue gas generated by the combustion of the device is used for heat exchange with the superheated steam formed by evaporation and heating, so as to realize the preheating of the leachate concentrate, air, and combustible mixed gas, increase the enthalpy value of the combustible gas, and be more efficient and save energy;

[0027] Step three, leachate concentrate evaporation and drying process: 70%-90% of the leachate concentrate is pumped into the evaporation chamber through the concentrate water inlet pipe by the water inlet pump for evaporation and crystallization; the other 10%-30% of the leachate concentrate is pumped into the Venturi tube through the concentrate pressure pipe by the secondary pressure pump, the Venturi tube self-primes the air mixed with the leachate concentrate and enters the gas-liquid mixing tube, and enters the combustion chamber through the gas-liquid nozzle to cooperate with the combustible gas for super-enthalpy combustion, so as to realize the rapid flash evaporation and drying treatment of the leachate concentrate.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] In the present invention, the high temperature generated by super-enthalpy combustion is used to quickly evaporate the leachate concentrate, and part of the leachate concentrate is directly burned in coordination with the super-enthalpy combustion to perform flash drying, which has high thermal efficiency and energy efficiency, and realizes efficient reduction treatment and disposal of the leachate concentrate. In addition, the saturated steam generated by evaporation is used to generate electricity to heat the steam to obtain superheated steam. The high temperature of the superheated steam has a good preheating effect on the air and the mixed combustible gas, so that the mixed combustible gas meets the preheating requirements of super-enthalpy combustion. The high-temperature flue gas waste heat generated by the super-enthalpy combustion is used to preheat the leachate concentrate. The preheated leachate concentrate can be quickly heated to the evaporation temperature in the evaporation chamber, which can improve the evaporation efficiency. The preheated leachate concentrate is directly sprayed with self-absorbed air from the venturi tube in coordination with the super-enthalpy combustion, which can not only improve the drying efficiency of the leachate concentrate, but also promote the combustion efficiency of the super-enthalpy combustion. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a diagram of a leachate concentrate cooperative superenthalpy combustion evaporation treatment device in the present invention;

[0031] Figure 2 It is a schematic diagram of the structure of the evaporation chamber in the present invention;

[0032] Figure 3 It is a schematic diagram of the cross-sectional structure of the evaporation chamber in the present invention;

[0033] Figure 4 It is a schematic diagram of the structure of the air intake device in the present invention.

[0034] Markings in the figure: 1. Combustion chamber, 2. Evaporation chamber, 3. Insulation protection layer, 4. High-efficiency heat transfer medium layer, 5. Mixed combustion gas nozzle, 6. Pre-mixed gas nozzle, 7. Discharge electrode, 8. Thermocouple in furnace, 9. Ignitor, 10. External electrode, 11. External electrode quartz protection layer, 12. Water inlet pump, 13. Quartz bottom plate, 14. Flue gas outlet, 21. Steam collecting hood, 22. Saturated steam pipe, 23. Scraper, 24. Generator impeller, 25. Guide device, 26. Resistance wire, 27. Superheated steam pipe thermocouple, 28. Insulation layer, 29. Generator, 31. Gas bottle, 32. Gas pipe, 33. Pressure reducing valve, 34. Gas flow meter, 41. Vortex fan, 42. Air intake pipe, 43. Intake valve, 44. Gas flow meter, 51. Gas mixer, 52. Flow meter, 53. Mixed gas pipeline, 54. Barometer, 55. Rectifier, 56. Insulation layer, 121. Concentrate water inlet pipe, 122. Water inlet valve, 123. Secondary booster pump, 124. Concentrate booster pipe, 125. Venturi tube, 126. Gas-liquid mixing pipe, 127. Gas-liquid nozzle, 131. Heat-resistant asbestos, 132. Slag discharge valve, 133. Ash collecting tank, 141. exhaust pipe flange, 142. high-temperature flue gas exhaust pipe, 143. insulation layer, 144. flue gas filter, 145. axial flow fan, 146. rain cap, 221. superheated steam pipe, 222. condensate outlet, 223. drain valve, 231. evaporation chamber slag discharge trough, 232. slag discharge spiral device, 233. drive motor, 234. sealing sleeve, 235. slag discharge pipe. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0036] Reference Figure 1-4 ,

[0037] Reference Figure 1-4A high-efficiency heat transfer medium layer 4 is arranged at the upper end of the combustion chamber 1, and a symmetrical flue gas outlet 14, a furnace thermocouple 8, an igniter 9, a cylindrical outer electrode 10, and a cylindrical outer electrode quartz protective layer 11 are arranged on the inner wall of the combustion chamber 1; an air intake device is arranged in the middle of the combustion chamber 1, and four rows of symmetrical mixed combustion gas nozzles 5 are arranged at the upper end of the air intake device, four rows of symmetrical annular discharge electrodes 7 are arranged on the outer wall, and four rows of symmetrical pre-mixed gas nozzles 6 are arranged at the lower end, and a rectifier 55 is arranged at the bottom and connected to the mixed gas pipeline 53; two symmetrical gas-liquid nozzles 127, a quartz bottom plate 13 and a slag discharge hole are arranged at the lower part of the combustion chamber, one end of the quartz bottom plate 13 is provided with heat-resistant asbestos 131, and a slag discharge valve 132 is arranged at the end of the quartz bottom plate 13 opposite to the heat-resistant asbestos 131, and the output end of the slag discharge valve 132 is provided with the input end of the ash slag collection tank 133, and one end of the flue gas outlet 14 is provided with a smoke exhaust pipe flange 141. The efficient heat transfer medium layer 4 is the key medium for heat conduction. It can quickly and evenly distribute the heat in the combustion chamber 1, so that the leachate concentrate can quickly obtain sufficient heat during evaporation and drying, accelerate the evaporation process, and improve the processing efficiency. At the same time, the stable thermal environment is conducive to the full combustion reaction, reducing incomplete combustion products, and promoting the smooth realization of synergistic super-enthalpy combustion and flash drying. The flue gas outlet 14 and the exhaust pipe flange 141 The flue gas outlet 14 is responsible for timely discharging the high-temperature flue gas generated by the combustion, which is indispensable for maintaining the stable pressure in the combustion chamber and ensuring continuous combustion. The exhaust pipe flange 141 facilitates the connection between the flue gas outlet 14 and the exhaust pipe, ensures the sealing and stability of the flue gas emission system, prevents flue gas leakage, and ensures the safe and efficient operation of the entire system. The thermocouple 8 in the furnace monitors the temperature in the combustion chamber in real time, providing key data for the operator to accurately control the combustion reaction process. With these data, combustion parameters such as fuel supply and air intake can be accurately adjusted to ensure that combustion is always in the best state, achieve efficient and stable combustion and evaporation and drying process, and prevent abnormal conditions such as overheating from causing damage to the equipment. The igniter 9 is a starting device for the combustion reaction. It can provide initial energy, ignite the mixed gas of the combustible gas and the leachate concentrate, and start the entire combustion process. It is the primary link in the normal operation of the system, ensuring that subsequent super-enthalpy combustion, evaporation and crystallization processes can be carried out in an orderly manner.

[0038] The cylindrical outer electrode 10 and the annular discharge electrode 7 work together to generate plasma in the combustion chamber when a pulse voltage is applied. The active substances in the plasma greatly increase the combustion reaction rate and combustion temperature, realize the super-enthalpy combustion of low-concentration combustible gas in coordination with the leachate concentrate, allow the concentrate to flash dry quickly, improve the processing efficiency, and reduce pollutant emissions. The outer electrode quartz protective layer 11 provides physical protection for the outer electrode to prevent it from being damaged under high temperature, high pressure and complex chemical environment, extend the service life of the outer electrode, ensure the stability of the discharge process, and thus ensure the continuous stability of the plasma combustion-supporting effect, and maintain the normal operation of the entire combustion system. The mixed combustion gas nozzle 5 and the pre-mixed gas nozzle 6 are responsible for accurately delivering the mixed combustible gas to the combustion chamber to ensure that it is in full contact with the leachate concentrate and provide the necessary fuel for the combustion reaction. The rectifier 55 rectifies the incoming mixed gas to stabilize the airflow and optimize the combustion effect. The mixed gas pipeline 53 is not only a conveying channel for the mixed gas, but its spiral winding structure with the superheated steam pipe 221 can also use the heat of the superheated steam to preheat the mixed gas, increase the enthalpy value of the combustible gas, meet the super-enthalpy combustion preheating requirements, and promote the improvement of combustion efficiency. The gas-liquid nozzle 127 evenly sprays the mixed gas and liquid of the leachate concentrate and air after the negative pressure self-absorption of air through the venturi tube 125 into the combustion chamber, so that the gas and liquid are fully mixed to form a good dispersion effect, which is conducive to the plasma medium blocking discharge, accelerates the combustion reaction, and realizes the efficient synergistic super-enthalpy combustion and rapid flash drying of the concentrated liquid. The quartz bottom plate 13, heat-resistant asbestos 131, slag valve 132 and ash collection tank 133 The quartz bottom plate 13 provides bottom support for the combustion chamber, and the heat-resistant asbestos 131 provides insulation protection for it to prevent excessive heat loss and protect the bottom plate from high temperature damage. Solid residues after combustion, such as fly ash and particulate matter, are naturally deposited on the quartz bottom plate 13 under the action of gravity. The slag discharge valve 132 is opened regularly, and these residues enter the ash collection tank 133 through the slag discharge valve 132, which is convenient for centralized collection and subsequent treatment, so as to maintain the cleanliness of the interior of the combustion chamber and ensure the continuous and stable operation of the system.

[0039] Reference Figure 1-4The bottom of the evaporation chamber 2 is provided with a scraper 23, a slag discharge groove 231 of the evaporation chamber, a slag discharge spiral device 232, a driving motor 233, a sealing sleeve 234 and a slag discharge pipe 235; the concentrated liquid water inlet pipe 121 is symmetrically connected on both sides, and a gas collecting hood 21 is provided on the upper end, and the gas collecting hood is connected to the saturated steam pipe 22, the impeller 24 of the generator set and the superheated steam pipe 221. When the driving motor 233 drives the slag discharge spiral device 232 to rotate, the scraper 23 scrapes the crystallized solid at the bottom of the evaporation chamber to the slag discharge groove 231, and the slag discharge spiral device 232 further transmits it to the slag discharge pipe 235 for discharge. The sealing sleeve 234 ensures sealing when the slag discharge device stops to prevent leakage of the concentrated liquid. This combination effectively realizes solid-liquid separation, discharges solid residues, and maintains the normal operation of the evaporation chamber. The slag discharge groove 231 of the evaporation chamber serves as a temporary collection area for the scraper 23 to transport the crystallized solid, which is convenient for the slag discharge spiral device 232 to discharge the solid in an orderly manner, avoiding the accumulation of residues that affects the evaporation efficiency and equipment operation. The concentrated liquid inlet pipe 121 is symmetrically arranged on both sides of the evaporation chamber to ensure that the leachate concentrate enters the evaporation chamber evenly and stably, so that the concentrated liquid is evenly distributed in the evaporation chamber, which is conducive to heat transfer and efficient evaporation process. Gas collecting hood 21, saturated steam pipe 22, generator impeller 24 and superheated steam pipe 221 The gas collecting hood 21 collects the saturated steam generated by evaporation, transports it through the saturated steam pipe 22, and drives the generator impeller 24 to rotate and generate electricity. The generated electricity is used to secondary heat the steam through the resistance wire 26 to form superheated steam 450℃-850℃. The superheated steam is used to preheat the air and mixed combustible gas, and at the same time remove some volatile and semi-volatile organic matter in the saturated steam, so as to realize energy recovery and pollutant elimination, and improve the energy efficiency and environmental protection of the system.

[0040] Reference Figure 1-4The air intake device inputs the combustible mixed gas through the pre-mixed gas nozzle 6 and the mixed combustion gas nozzle 5, and the gas-liquid nozzle 127 is connected to the gas-liquid mixing pipe 126, the venturi tube 125, the concentrate pressurizing pipe 124 and the secondary pressurizing pump 123 in sequence. The pre-mixed gas nozzle 6 and the mixed combustion gas nozzle 5 are the key channels for the combustible mixed gas to enter the combustion chamber. They can spray the combustible mixed gas that has been precisely prepared and preheated into the combustion chamber evenly and stably, ensuring that the mixed gas is fully in contact with the leachate concentrate and air in the combustion chamber, providing suitable fuel conditions for the combustion reaction, and promoting the efficient combustion reaction. The secondary pressurizing pump 123 pressurizes part of the leachate concentrate through the concentrate pressurizing pipe 124, so that it forms a negative pressure in the venturi tube 125, thereby self-priming air into the concentrate to achieve preliminary mixing of air and concentrate. The mixed gas and liquid are then further mixed evenly through the gas-liquid mixing pipe 126, and finally the mixed gas and liquid are sprayed into the combustion chamber with good atomization effect by the gas-liquid nozzle 127. This series of components work together to ensure that the leachate concentrate is fully mixed with the air to form a mixed gas and liquid that is conducive to combustion, improve the combustion efficiency, and promote the coordinated super-enthalpy combustion and rapid flash drying of the concentrate. At the same time, this method can also make the combustion more complete, reduce pollutant emissions, and improve the treatment effect of the entire device on the leachate concentrate.

[0041] Reference Figure 1-4, the mixed gas draws air from the vortex fan 41, and the gas volume is controlled by the connected air intake valve 43 and enters the gas mixer 51 through the gas flow meter 44. In addition, the combustible gas is transferred to the gas pipe 32 through the gas bottle 31, and then enters the gas mixer 51 through the gas flow meter 34 through the connected pressure reducing valve 33. After the combustible gas and air are fully mixed, they enter the mixed gas pipeline 53. An air intake pipe 42 is provided at one end of the vortex fan 41, a flow meter 52 is provided at the lower end of the gas mixer 51, a barometer 54 is provided at one end of the mixed gas pipeline 53, and an insulation layer 56 is provided on the outside of the mixed gas pipeline 53. The vortex fan 41, as a power source, draws air through the air intake pipe 42 to provide the necessary oxygen for the combustion reaction. Its stable operation can ensure the continuity and stability of the air supply, meet the demand for oxygen in the combustion process, and enable the combustion reaction to proceed smoothly. The air intake valve 43 accurately controls the amount of air entering the gas mixer 51, and cooperates with the gas flow meter 44 to achieve accurate regulation and real-time monitoring of the air intake volume. This helps to accurately control the air ratio according to the combustion requirements, optimize the combustion effect, improve the combustion efficiency, and ensure the safety and stability of the system operation. The gas bottle 31 stores combustible gas, and the gas pipe 32 transports it to the gas mixer 51. The pressure reducing valve 33 reduces the pressure of the combustible gas so that its pressure meets the requirements of the combustion system and ensures the safety and stability of the gas supply. The gas flow meter 34 accurately measures the gas flow entering the gas mixer 51, which is convenient for accurate proportioning with the air volume to ensure that the mixed gas reaches the ideal combustion conditions and achieves efficient and stable combustion. The gas mixer 51 fully mixes the air and the combustible gas so that the two are evenly distributed to form a mixed gas suitable for combustion. The flow meter 52 monitors the mixed gas flow and provides flow data to the operator so that the intake valve 43 and the pressure reducing valve 33 can be further adjusted to achieve accurate control of the mixed gas flow and ratio to ensure that the combustion reaction is carried out in the best state. The mixed gas pipeline 53 serves as a conveying channel for the mixed gas to convey the mixed gas to the combustion chamber. The barometer 54 monitors the air pressure in the pipeline in real time to ensure that the mixed gas enters the combustion chamber at an appropriate pressure to prevent abnormal pressure from affecting the combustion effect or equipment safety. The insulation layer 56 reduces the heat loss of the mixed gas during transportation and maintains the temperature of the mixed gas, which helps to improve the combustion efficiency and avoids the safety hazards caused by the excessive temperature of the outer wall of the pipeline, ensuring the safe and efficient operation of the system.

[0042] Reference Figure 1-4 A generator impeller 24 is provided at one end of the evaporation chamber 2, a generator set 29 is provided at one end of the generator impeller 24, and a resistance wire 26 is provided at one side of the generator set 29. The saturated steam generated by the evaporation chamber 2 is used to generate electricity through the generator impeller 24 and the generator set 29, and the generated electricity is used to reheat the steam through the resistance wire 26 to obtain superheated steam of 450°C to 850°C.

[0043] Reference Figure 1-4 A bottom scraper 23 is provided on one side of the interior of the evaporation chamber 2. The bottom scraper 23 is provided with a slag removal spiral device 232 through a rotating shaft. The output end of the driving motor 233 is provided with the input end of the evaporation chamber slag removal groove 231. One end of the driving motor 233 is provided with a heat insulation protective layer 3. The output end of the evaporation chamber slag removal groove 231 is provided with the input end of the slag removal pipe 235. The slag removal spiral device is connected with a sealing sleeve 234. The evaporation chamber 2 utilizes the high temperature rapid evaporation crystallization generated by superenthalpy combustion. The rotating shaft of the bottom scraper 23 is connected with the spiral rod of the slag removal spiral device 232 by a gear. The output end of the driving motor 233 is provided with the input end of the evaporation chamber slag removal groove 231. One end of the driving motor 233 is provided with a heat insulation protective layer 3. The output end of the evaporation chamber slag removal groove 231 is provided with the input end of the slag removal pipe 235. The slag removal spiral device is connected with a sealing sleeve 234.

[0044] Reference Figure 1-4 , the superheated steam pipe 221 and the high-temperature flue gas exhaust pipe 142 are connected to the flue gas filter 144. The flue gas filter 144 is connected to an axial flow fan 145 and a rain cap 146 is provided on the top. A condensate outlet 222 is provided at one end of the superheated steam pipe 221, and a drain valve 223 is provided at one end of the condensate outlet 222. The superheated steam pipe 221 transports the superheated steam generated in the evaporation chamber to the flue gas filter 144. In this process, the superheated steam can preheat other components such as the mixed gas pipeline, realize heat recovery and improve energy utilization. The high-temperature flue gas exhaust pipe 142 guides the high-temperature flue gas generated in the combustion chamber to the flue gas filter 144. The high-temperature flue gas is filtered before being discharged to remove particulate matter and harmful gases therein, thereby reducing pollution to the environment.

[0045] The two are connected to the flue gas filter 144, ensuring that the steam and flue gas in the system are purified before being discharged, meeting environmental protection requirements. When the axial flow fan 145 is in operation, negative pressure is formed in the superheated steam pipe 221 and the high-temperature flue gas exhaust pipe 142. For the superheated steam pipe 221, the negative pressure causes the saturated steam generated by the evaporation chamber to quickly enter the superheated steam pipe 221 for subsequent power generation and heat exchange processes, while ensuring that the superheated steam can be discharged in time to avoid steam accumulation in the system causing pressure increase, affecting system safety and operating efficiency. For the high-temperature flue gas exhaust pipe 142, the negative pressure causes the high-temperature flue gas generated by combustion to be quickly discharged from the combustion chamber, ensuring that the pressure in the combustion chamber is stable, which is conducive to the continuous combustion reaction, and at the same time accelerates the flue gas to enter the flue gas filter 144 for purification. Installed on the top of the final exhaust pipe, the rain cap 146 can prevent rainwater from entering the exhaust pipe and the flue gas filter 144 and other equipment. The entry of rainwater may cause corrosion and damage to the equipment, affecting the normal operation of the system. The rain cap 146 effectively protects the equipment from rainwater erosion, extends the service life of the equipment, and ensures the stable operation of the system. In the superheated steam pipe 221, the steam will partially condense to form condensed water during the transmission and heat exchange process. The condensate outlet 222 provides a discharge channel for the condensed water, and the drain valve 223 controls the discharge of the condensed water. Regularly opening the drain valve 223 can discharge the condensed water accumulated in the superheated steam pipe 221, avoiding the accumulation of condensed water in the pipeline to affect the steam flow and heat exchange efficiency, and even cause pipeline corrosion or other failures, to ensure the normal operation of the system.

[0046] Reference Figure 1-4 A water inlet pump 12 is provided on one side of the evaporation chamber 2, a concentrated liquid water inlet pipe 121 is provided at one end of the water inlet pump 12, and a water inlet valve is provided at one end of the concentrated liquid water inlet pipe 121. The saturated steam in the evaporation chamber enters the superheated steam pipe 221 symmetrically arranged on both sides from the saturated steam pipe through the guide device 25, a guide device 25 is provided at one end of the resistance wire 26, an insulation layer 28 is provided outside the heat exchange tube, and an overheated steam pipe thermocouple 27 is provided at one end of the insulation layer 28. The leachate concentrate is pumped into the concentrate inlet pipe 121 by the inlet pump 12, and the inlet valve 122 is opened, and the leachate concentrate enters the evaporation chamber 2. The saturated steam generated in the evaporation chamber enters the superheated steam pipe 221 symmetrically arranged on both sides through the saturated steam pipe through the guide device 25. The saturated steam drives the impeller 24 of the generator set to rotate and generates electricity through the generator set 29. The generated electricity is used to reheat the saturated steam through the resistance wire 26 to form superheated steam 450℃~850℃. The superheated steam thermocouple 27 can monitor the steam temperature in real time, and use the superheated steam to preheat the air and the mixed combustible gas. An insulation layer 28 is set outside the heat exchange tube.

[0047] Reference Figure 1-4A high-temperature flue gas exhaust pipe 142 is provided at one end of the axial flow fan 145, a flue gas outlet 14 is provided at one side of the high-temperature flue gas exhaust pipe 142, a flue gas filter 144 is provided at one end of the flue gas outlet 14, a high-temperature flue gas exhaust pipe 142 is provided on the outer surface of the concentrate water inlet pipe 121, and a heat preservation layer 143 is provided on the outside of the concentrate water inlet pipe 121. Due to the operation of the axial flow fan 145, negative pressure is formed in the high-temperature flue gas exhaust pipe 142, and the high-temperature flue gas generated by the super-enthalpy combustion in the furnace enters the high-temperature flue gas exhaust pipe 142 through the flue gas outlet 14 through negative pressure self-absorption, and then is filtered by the flue gas filter 144, and finally discharged by the axial flow fan 145. At the same time, the high-temperature flue gas exhaust pipe 142 is spirally wound on the concentrate water inlet pipe, and a heat preservation layer 143 is provided on the outside.

[0048] Working principle:

[0049] By directly evaporating the leachate concentrate at a high temperature of over 1000°C generated by superenthalpy combustion, the leachate concentrate can be quickly evaporated, dried and crystallized, and then the saturated steam in the evaporation chamber is used to generate electricity. The generated electricity is used to reheat the saturated steam to obtain superheated steam at 450°C~850°C. The superheated steam is used to preheat the mixed combustible gas, and the superheated steam can remove some volatile and semi-volatile organic matter mixed in the saturated steam, thereby achieving the preheating effect and eliminating some organic pollutants.

[0050] In the furnace, pulse voltage is applied to the inner and outer electrodes to form discharge between the electrodes covered by the dielectric, and the air and concentrated liquid sprayed by the 127 gas-liquid nozzles and the mixed combustible gas released by the 6 front mixed gas nozzles are subjected to plasma dielectric barrier discharge. A large amount of plasma is generated by ionizing the gas air, combustible gas and concentrated liquid, which has a significant combustion-supporting effect, can greatly improve the combustion reaction rate and combustion temperature, and realize the super-enthalpy combustion of low-concentration combustible gas and leachate concentrate in the furnace, so that the concentrated liquid in the spraying furnace is quickly flashed and dried. In addition, the combustion temperature in the furnace is relatively high, and the high-efficiency combustion can make full use of the chemical energy of the gas without producing toxic gases such as dioxins.

[0051] The leachate concentrate spraying and synergistic super-enthalpy combustion system, through the secondary pressurization of the preheated leachate concentrate and conveying it into the Venturi tube, uses the negative pressure of the Venturi tube to self-absorb air to achieve mixing of the concentrate and air. The mixed gas and liquid assist combustion while the concentrate is directly burned and flash evaporated for drying disposal. The synergistic super-enthalpy combustion and drying disposal of the sprayed partial leachate concentrate of 10%~30% is extremely efficient.

[0052] The steam and high-temperature flue gas generated by the operation of the device itself are used to preheat the leachate concentrate and the mixed gas. Saturated steam is used to generate electricity to achieve secondary steam heating, and superheated steam of 450℃~850℃ is obtained. The superheated steam is used for heat exchange to preheat the air and the mixed combustible gas to reach the preheating temperature of super-enthalpy combustion. In addition, the high-temperature flue gas of 600℃~1500℃ generated by the super-enthalpy combustion in the furnace is used to preheat the leachate concentrate. Preheating can increase the enthalpy value of the leachate concentrate sprayed into the furnace for combustion, and increase the super-enthalpy combustion reaction rate. On the other hand, by preheating the concentrate, the concentrate entering the evaporation chamber is quickly heated to the boiling point, which accelerates the evaporation rate.

[0053] An axial flow fan is installed at the end of the exhaust pipe. The operation of the fan keeps the inside of the 22 saturated steam pipe, the 221 superheated steam pipe and the 142 high-temperature flue gas exhaust pipe in a negative pressure state, so that the saturated steam in the evaporation chamber and the high-temperature flue gas in the super-enthalpy combustion furnace are quickly discharged through the negative pressure pipe through self-priming, avoiding the safety hazard of increased air pressure caused by the poor discharge of saturated steam in the evaporation chamber, and the super-enthalpy combustion flue gas is discharged in time to ensure that the combustion efficiency in the furnace is not reduced.

[0054] The mixed combustible gas preheated to the super-enthalpy combustion preheating enthalpy value enters the combustion chamber through the rectifier and the air intake device. In addition, the preheated and air-mixed leachate concentrate is sprayed into the combustion chamber by the gas-liquid nozzle. The mixed combustible gas, air, and concentrate rise to generate eddy currents and turbulences, which strengthen the gas-liquid mixing effect. Then, by applying a pulse voltage to the discharge electrode, a dielectric barrier discharge of the plasma is performed, and a large amount of plasma is generated to assist combustion, thereby improving the combustion efficiency, maintaining a high combustion temperature, and fully super-enthalpy combustion to reduce pollutant emissions, thus achieving efficient leachate concentrate coordinated super-enthalpy combustion treatment and disposal.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A leachate concentrate cooperative superenthalpy combustion evaporation treatment device, comprising a combustion chamber (1), an evaporation chamber (2) and a heat exchange tube, characterized in that: The combustion chamber (1) has a high-efficiency heat transfer medium layer (4) disposed at the upper end thereof, and the inner wall of the combustion chamber (1) is provided with symmetrical smoke exhaust ports (14), a furnace thermocouple (8), an igniter (9), a cylindrical outer electrode (10), and a cylindrical outer electrode quartz protective layer (11); an air intake device is disposed in the middle of the combustion chamber (1), and four rows of symmetrical mixed combustion gas nozzles (5) are disposed at the upper end of the air intake device, four rows of symmetrical annular discharge electrodes (7) are disposed on the outer wall, and four rows of symmetrical front mixed gas nozzles (6) are disposed at the lower end, and a rectifier (55) is disposed at the bottom thereof and connected to the mixed gas pipeline (53); two symmetrical gas-liquid nozzles (1 27), a quartz bottom plate (13) and a slag discharge hole, one end of the quartz bottom plate (13) is provided with heat-resistant asbestos (131), one end of the quartz bottom plate (13) opposite to the heat-resistant asbestos (131) is provided with a slag discharge valve (132), the output end of the slag discharge valve (132) is provided with the input end of the ash collection tank (133), one end of the smoke outlet (14) is provided with a smoke exhaust pipe flange (141), and the bottom of the evaporation chamber (2) is provided with a scraper (23), an evaporation chamber slag discharge tank (231), a slag discharge spiral device (232), a drive motor (233), a sealing sleeve (234) and a slag discharge pipe (235);The two sides are symmetrically connected with a concentrate water inlet pipe (121), and the upper end is provided with a gas collecting hood (21), which is connected to a saturated steam pipe (22), a generator impeller (24) and a superheated steam pipe (221). The mixed gas is extracted by a vortex fan (41), and the gas volume is controlled by a connected air intake valve (43) and enters a gas mixer (51) through a gas flow meter (44). In addition, combustible gas is transferred to a gas pipe (32) through a gas cylinder (31), and then enters a gas mixer (51) through a connected pressure reducing valve (33) and a gas flow meter (34). After being fully mixed with air, the combustible gas and air enter the mixed gas pipeline (53); an air intake pipe (42) is provided at one end of the vortex fan (41); a flow meter (52) is provided at the lower end of the gas mixer (51); a pressure gauge (54) is provided at one end of the mixed gas pipeline (53); an insulating layer (56) is provided on the outer side of the mixed gas pipeline (53); a bottom scraper (23) is provided on one side of the interior of the evaporation chamber (2); a slag removal spiral device (232) is provided on the bottom scraper (23) via a rotating shaft; and the drive motor (233) ) is provided with an input end of an evaporation chamber slag discharge groove (231), one end of the drive motor (233) is provided with a heat insulation protective layer (3), the output end of the evaporation chamber slag discharge groove (231) is provided with an input end of a slag discharge pipe (235), the slag discharge spiral device is connected to a sealing sleeve (234), a water inlet pump (12) is provided on one side of the evaporation chamber (2), a concentrated liquid water inlet pipe (121) is provided on one end of the water inlet pump (12), a concentrated liquid water inlet pipe (121) is provided on one end of the concentrated liquid water inlet pipe (121), and a water inlet valve (122) is provided on one end of the evaporation chamber. Saturated steam enters the superheated steam pipes (221) symmetrically arranged on both sides from the saturated steam pipe through the flow guide device (25); a generator set impeller (24) is arranged at one end of the evaporation chamber (2); a motor set (29) is arranged at one end of the generator set impeller (24); a resistance wire (26) is arranged at one side of the motor set (29); a flow guide device (25) is arranged at one end of the resistance wire (26); an insulation layer (28) is arranged outside the heat exchange pipe; and a superheated steam pipe thermocouple (27) is arranged at one end of the insulation layer (28). ; 2. The leachate concentrate cooperative superenthalpy combustion evaporation treatment device according to claim 1, characterized in that: The air intake device inputs the combustible mixed gas through the front mixed gas nozzle (6) and the mixed combustion gas nozzle (5); the gas-liquid nozzle (127) is connected in sequence to the gas-liquid mixing pipe (126), the venturi tube (125), the concentrated liquid pressurizing pipe (124) and the secondary pressurizing pump (123).

3. A leachate concentrate cooperative superenthalpy combustion evaporation treatment device as claimed in claim 2, characterized in that: The superheated steam pipe (221) and the high-temperature flue gas exhaust pipe (142) are connected to a flue gas filter (144); the flue gas filter (144) is connected to an axial flow fan (145) and is provided with a rainproof cap (146) on the top; a condensate outlet (222) is provided at one end of the superheated steam pipe (221); and a drain valve (223) is provided at one end of the condensate outlet (222).

4. A leachate concentrate cooperative superenthalpy combustion evaporation treatment device as claimed in claim 3, characterized in that: A high-temperature smoke exhaust pipe (142) is provided at one end of the axial flow fan (145), a smoke exhaust port (14) is provided at one side of the high-temperature smoke exhaust pipe (142), a smoke filter (144) is provided at one end of the smoke exhaust port (14), a high-temperature smoke exhaust pipe (142) is provided on the outer surface of the concentrated liquid water inlet pipe (121), and a heat-insulating layer (143) is provided outside the concentrated liquid water inlet pipe (121).

5. The application method of the leachate concentrate cooperative superenthalpy combustion evaporation treatment device according to claim 4, characterized in that: The following steps are involved: Step 1, super enthalpy combustion process: after the combustible gas and air are fully mixed by the gas mixer (51), they are preheated by the mixed gas pipeline (53) and flow through the rectifier (55), and the combustible mixed gas enters the combustion chamber through the front mixed gas nozzle (6) and the mixed combustion gas nozzle (5). In addition, the 10%-30% leachate concentrate and the air mixed gas and liquid after heat exchange between the preheated high-temperature flue gas exhaust pipe (142) and the concentrated liquid pressurizing pipe (124) enter the combustion chamber through the gas-liquid nozzle (127), wherein the superheated steam pipe (221) and the mixed gas pipeline (53) exchange heat, and the mixed combustible gas, air, and atomized concentrated liquid gas generate eddy current and turbulence, so that the gas-liquid mixing effect is better. By applying a pulse voltage, the annular discharge electrode (7) and the outer electrode (10) form an inter-electrode discharge covered by a dielectric, and a dielectric barrier discharge of plasma is performed, and a large amount of plasma is ionized to generate combustion-supporting, thereby realizing the coordinated super enthalpy combustion treatment of the concentrated liquid and the combustible mixed gas; Step 2, efficient heat exchange process: the concentrate is preheated by the waste heat of the high-temperature flue gas generated by the super-enthalpy combustion in the combustion chamber, and the concentrate water inlet pipe (121) and the concentrate pressurizing pipe (124) are heat exchanged by the spirally wound high-temperature flue gas exhaust pipe (142); the air inlet pipe (42) and the mixed gas pipeline (53) are spirally wound on the superheated steam pipe (221), and the superheated steam formed by the secondary heating of the saturated steam generated in the evaporation process of the leachate concentrate is preheated, and the energy for heating the superheated steam is generated by saturated steam power generation, and the high-temperature flue gas generated by the combustion of the device is used for heat exchange with the superheated steam formed by the evaporation and heating, so as to realize the preheating of the leachate concentrate, air, and combustible mixed gas, increase the enthalpy value of the combustible gas, and be more efficient and save energy; Step 3, leachate concentrate evaporation and drying process: 70%-90% of the leachate concentrate is pumped into the evaporation chamber through the concentrate water inlet pipe (121) by the water inlet pump (12) for evaporation and crystallization; the other 10%-30% of the leachate concentrate is pumped into the venturi tube (125) through the concentrate pressure pipe (124) by the secondary pressure pump (123), the venturi tube self-absorbs air to mix the leachate concentrate and enters the gas-liquid mixing pipe (126), and enters the combustion chamber through the gas-liquid nozzle (127) to cooperate with the combustible gas for super-enthalpy combustion, thereby realizing rapid flash evaporation and drying treatment of the leachate concentrate.

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