Treatment device and method for recycling fly ash and sludge through synergistic ultrahigh-temperature melting

Abstract

The invention provides a treatment device and method for recycling fly ash and sludge through collaborative ultrahigh-temperature melting, and relates to the technical field of incineration of fly ash and sludge, the treatment device comprises a fly ash and sludge pretreatment unit, a melting gasification unit and a gas treatment unit, and the fly ash and sludge pretreatment unit is used for pretreating fly ash and sludge; the waste derived fuel is pressed into spherical or blocky waste derived fuel; the melting gasification unit comprises a conveying system and a melting gasification furnace, a depressurization expansion bag is arranged at the top of the melting gasification furnace, and the melting gasification furnace utilizes constant-speed and quantitative high-temperature spiral airflow to meet the requirement for redox of waste derived fuel; the gas inlet end of the gas treatment unit is connected with the depressurization expansion bag, and the gas treatment unit comprises a Brown type fluid high-temperature heating and cooling waste gas treatment device connected with the melting gasification furnace; according to the method, the fly ash and sludge treatment effect is remarkable, near-zero emission of waste gas, waste liquid and waste residues can be achieved, resource reutilization can be achieved, and energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of incineration fly ash and sludge treatment, and in particular to a treatment device and method for fly ash and sludge coordinated ultra-high temperature melting resource utilization. Background Art

[0002] Domestic waste incineration fly ash (hereinafter referred to as incineration fly ash) is a powdery substance collected by the flue gas purification system of domestic waste incineration. It is a hazardous waste (coded as HW18). The incineration fly ash contains organic pollutants such as benzopyrene, benzanthracene, dioxins and heavy metals such as Cr, Cd, Hg, Pb, Cu, Ni, etc. It is a highly dangerous solid waste. Among them, dioxins are chlorinated tricyclic aromatic hydrocarbon organic compounds with multiple toxic effects, which are irreversible teratogenic, carcinogenic and mutagenic; Hg and its compounds are extremely neurotoxic and can cause serious damage to multiple organs of the human body. In addition, the current domestic waste incineration fly ash also presents the following characteristics: high chlorine content, acidic substances such as hydrogen chloride generated by the incineration and decomposition of chlorine-containing plastics in domestic waste, react with alkaline substances in the flue gas purification system, and the products enter the incineration fly ash. The salt in the garbage is also eventually enriched in the incineration fly ash. The chlorine element in the incineration fly ash mainly exists in the form of soluble chloride salts, such as sodium chloride, potassium chloride, calcium chloride, etc. The composition is complex and fluctuates greatly. Furthermore, in addition to toxic and harmful substances such as heavy metals and dioxins, incineration fly ash also contains calcium, silicon, aluminum, iron oxides, chloride salts, carbon, sulfur, and phosphorus elements. If these fly ash from the incineration of domestic waste are not properly disposed of, they will cause serious harm to the environment. In addition, the incineration of medical waste will also produce fly ash, which also needs to be safely disposed of.

[0003] Sludge is a semi-solid organic waste derived from urban sewage treatment. It is an important measure needed at present to implement harmless treatment of sludge, promote resource utilization, and achieve synergistic efficiency in pollution reduction and carbon reduction.

[0004] Therefore, a processing device and method that can synergistically process fly ash and sludge, reduce waste emissions, and achieve resource recycling is in urgent need of invention. Summary of the invention

[0005] The purpose of the present invention is to provide a processing device for fly ash and sludge coordinated ultra-high temperature melting resource utilization to solve the above-mentioned technical problems existing in the prior art; the preferred technical scheme among the many technical schemes provided by the present invention can produce many technical effects; see the detailed description below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The present invention provides a fly ash and sludge coordinated ultra-high temperature melting resource processing device, comprising a fly ash and sludge pretreatment unit, a melting gasification unit and a gas treatment unit which are arranged in sequence, wherein: the fly ash and sludge pretreatment unit is used to pretreat fly ash and sludge, and press them into spherical or block-shaped waste-derived fuel; the melting gasification unit comprises a conveying system and a melting gasification furnace, the feed end of the conveying system is connected to the fly ash and sludge pretreatment unit, the discharge end of the conveying system is connected to the melting gasification furnace, the melting gasification furnace uses a constant speed and quantitative high-temperature spiral airflow to meet its oxidation and reduction of the waste-derived fuel, the top of the melting gasification furnace is provided with a pressure reduction expansion bag, and the bottom of the melting gasification furnace is provided with a high-temperature lava slag outlet; the air inlet end of the gas treatment unit is connected to the pressure reduction expansion bag, the gas treatment unit is provided with an exhaust port, and the gas treatment unit comprises a Brownian fluid high-temperature heating and cooling waste gas treatment device, and the Brownian fluid high-temperature heating and cooling waste gas treatment device is connected to the melting gasification furnace.

[0008] Preferably, the fly ash and sludge pretreatment unit comprises a feed bin, a first pretreatment conveying device, a mixing device, a second pretreatment conveying device and a ball press, wherein: the feed bin is used for feeding fly ash and sludge; the feed end of the first pretreatment conveying device is connected to the feed bin; the feed port of the mixing device is arranged at the discharge end of the first pretreatment conveying device, the discharge port of the mixing device is connected to the feed end of the second pretreatment conveying device, and the mixing device is provided with a strong oxidant injection port; the discharge end of the second pretreatment conveying device is connected to the feed port of the ball press, and the discharge port of the ball press is located above the feed end of the conveying system.

[0009] Preferably, the conveying system includes a vertical conveying device, a buffer silo and a horizontal conveying device arranged in sequence along the conveying direction, the feed end of the vertical conveying device is connected to the fly ash and sludge pretreatment unit; the discharge end of the horizontal conveying device is connected to the melter gasification furnace; the number of the conveying systems is set to at least two.

[0010] Preferably, the melt-gasification unit comprises an oxygen generator, and the oxygen generator is connected to the melt-gasification furnace; a plurality of air inlet pipes are circumferentially arranged on the furnace wall of the melt-gasification furnace.

[0011] Preferably, the melt-gasification unit comprises a circulating water cooling tank and a magnetic separator, wherein: the circulating water cooling tank is arranged at the discharge end of the melt-gasification furnace; the magnetic separator is connected to the circulating water cooling tank and is used for separating heat-resistant alloys.

[0012] Preferably, the pressure-reducing expansion bag is connected to an exhaust branch, the exhaust branch is connected to the low-temperature plasma filter through a connecting pipe, and a high-frequency filter is arranged on the exhaust branch; there are at least two exhaust branches, each of which is provided with the high-frequency filter, and all the exhaust branches are arranged in parallel.

[0013] Preferably, the connecting pipeline is connected to an internal combustion generator through a connecting branch, and the internal combustion generator provides electric energy for the fly ash and sludge coordinated ultra-high temperature melting resource processing device; the Brownian fluid high-temperature heating and cooling exhaust gas treatment device includes a heating section and a cooling section, the heating section is connected to the melting gasification furnace through a hot gas outlet pipeline, and the cooling section is connected to the low-temperature plasma filter through a cold gas outlet pipeline.

[0014] Preferably, the gas processing unit further comprises a dust collector, wherein: the low-temperature plasma filter is connected to the dust collector; and the dust collector is connected to an exhaust pipe.

[0015] Preferably, the gas processing unit also includes a pressure swing adsorption hydrogen extraction device, which includes an adsorber, a hydrogen extraction compressor and a hydrogen tank, wherein: the adsorber is connected to a carbon monoxide inlet pipe and a reflux pipe, the carbon monoxide inlet pipe is connected to the exhaust pipe, and the reflux end of the reflux pipe is connected to the internal combustion generator; the hydrogen extraction compressor is connected to the adsorber; and the hydrogen tank is connected to the hydrogen extraction compressor.

[0016] The present invention provides a method for processing fly ash and sludge by coordinated ultra-high temperature melting and resource utilization, which at least comprises the following steps:

[0017] Pre-treating fly ash and sludge by a fly ash and sludge pre-treatment device and pressing them into waste-derived fuel in the form of pellets or blocks;

[0018] The waste-derived fuel is transported to the melt-gasification furnace through a conveying system, and the Brownian fluid high-temperature cooling exhaust gas treatment device provides heat energy for the melt-gasification furnace. The melt-gasification furnace uses a constant-speed and quantitative high-temperature spiral airflow to satisfy its oxidation-reduction of the waste-derived fuel, generating liquid high-temperature lava and exhaust gas. The liquid high-temperature lava is discharged through the high-temperature lava slag outlet of the melt-gasification furnace and processed as a resource;

[0019] The waste gas is treated by the gas treatment unit and then discharged.

[0020] The invention provides a fly ash and sludge coordinated ultra-high temperature melting resource processing device and method, which has at least the following beneficial effects:

[0021] The fly ash and sludge coordinated ultra-high temperature melting resource processing device comprises a fly ash and sludge pretreatment unit, a melting gasification unit and a gas treatment unit which are arranged in sequence. The fly ash and sludge pretreatment unit solidifies dioxins, heavy metals, chloride salts and other toxic and harmful substances in the fly ash and sludge in the lattice structure of the treated material through pretreatment, and presses them into spherical or block-shaped waste-derived fuel. The waste-derived fuel has greater mechanical strength and density, can slow down the gas release rate at low temperature, and ensures that it can smoothly enter the high temperature zone of the melting gasification unit.

[0022] The melt gasification unit includes a conveying system and a melt gasification furnace. The feed end of the conveying system is connected to the fly ash and sludge pretreatment unit, and the discharge end of the conveying system is connected to the melt gasification furnace. A pressure reduction expansion bag is arranged on the top of the melt gasification furnace, and a high-temperature lava slag outlet is arranged on the bottom of the melt gasification furnace. The air inlet end of the gas treatment unit is connected to the pressure reduction expansion bag, and the gas treatment unit is provided with an exhaust port. The gas treatment unit includes a Brownian fluid high-temperature heating and cooling waste gas treatment device, and the Brownian fluid high-temperature heating and cooling waste gas treatment device is connected to the melt gasification furnace. When treating waste-derived fuel, the conveying system transports the waste-derived fuel to the melt gasification furnace, and the Brownian fluid high-temperature heating The cooling waste gas treatment device provides stable thermal energy for the melt gasifier. The melt gasifier uses a constant speed and quantitative high-temperature spiral airflow to meet its oxidation-reduction needs for waste-derived fuels, eventually forming waste gas and high-temperature lava. After the high-temperature lava is discharged through the slag outlet, it is processed and reused as a resource. The waste gas enters the gas treatment unit, which processes it and then discharges it from the exhaust port. The Brownian fluid high-temperature heating and cooling waste gas treatment device can stably provide the melt gasifier with the temperature required for the oxidation-reduction reaction of 1800℃~2200℃, while ensuring good waste gas treatment effects. The continuous and stable temperature range can effectively guarantee the reaction effect. At the same time, combined with the subsequent gas treatment, the waste gas treatment effect is significant.

[0023] The present invention cooperates with the fly ash and sludge pretreatment unit, the melting gasification unit and the gas treatment unit, which not only has a significant fly ash and sludge treatment effect, can achieve near-zero emissions of waste gas, waste liquid and waste residue, but also can achieve resource recycling, energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 It is a structural schematic diagram of a fly ash machine sludge treatment unit of the present invention;

[0027] Figure 3 It is a schematic diagram of the structure of the melting gasification unit and the gas processing unit of the present invention;

[0028] Figure 4 is a schematic diagram of the main view of the melter-gasifier of the present invention;

[0029] Figure 5 is a schematic top view of the melter-gasifier of the present invention;

[0030] Figure 6 Schematic diagram of spiral airflow forming of the present invention;

[0031] Figure 7 It is a schematic structural diagram of the Brownian fluid high-temperature heating and cooling waste gas treatment device of the present invention;

[0032] Figure 8 This is a schematic diagram of the structure of the high-frequency electromagnetic heating device of the present invention.

[0033] Fig. 9 is a schematic front view of the high frequency filter of the present invention;

[0034] Fig.10 is a schematic side view of a high frequency filter of the present invention;

[0035] Fig.11 It is a structural schematic diagram of the adsorber of the present invention;

[0036] Fig.12 It is a structural schematic diagram of the hydrogen extraction compressor of the present invention.

[0037] Reference numerals

[0038] 1. Fly ash and sludge pretreatment unit; 11. Feeding bin; 12. First pretreatment conveying device; 13. Mixing device; 14. Second pretreatment conveying device; 15. Ball press; 2. Melting gasification unit; 21. Vertical conveying device; 22. Buffer silo; 23. Horizontal conveying device; 24. Melting gasification furnace; 241. Air inlet pipe; 25. Pressure reduction expansion bag; 26. Circulating water cooling tank; 27. Magnetic separator; 28. Oxygen generator; 3. Gas treatment unit; 31. Brownian fluid high temperature heating and cooling waste gas treatment device; 3 11. Cooling section; 312. Heating section; 313. High-frequency induction power supply; 314. High-frequency coil; 315. Ceramic insulating cylinder; 316. Filter; 317. High-frequency induction electrode; 318. Alkali solution spray; 319. Condenser; 32. Exhaust branch; 33. Connecting pipeline; 34. High-frequency filter; 35. Internal combustion generator; 36. Low-temperature plasma filter; 37. Dust collector; 38. Pressure swing adsorption hydrogen extraction device; 381. Adsorber; 382. Hydrogen extraction compressor; 383. Hydrogen tank. DETAILED DESCRIPTION

[0039] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0040] Embodiment 1:

[0041] The present invention provides a processing device for fly ash and sludge coordinated ultra-high temperature melting resource utilization, referring to Figures 1 to 12 As shown, the fly ash and sludge coordinated ultra-high temperature melting resource processing device includes a fly ash and sludge pretreatment unit 1, a melting gasification unit 2 and a gas treatment unit 3 which are arranged in sequence.

[0042] The melt gasification unit 2 includes a conveying system and a melt gasification furnace 24, the feed end of the conveying system is connected to the fly ash and sludge pretreatment unit 1, the discharge end of the conveying system is connected to the melt gasification furnace 24, a pressure reduction expansion bag 25 is provided on the top of the melt gasification furnace 24, and a high-temperature lava slag outlet is provided at the bottom of the melt gasification furnace 24; the air inlet end of the gas treatment unit 3 is connected to the pressure reduction expansion bag 25, the gas treatment unit 3 is provided with an exhaust port, and the gas treatment unit 3 includes a Brownian fluid high-temperature heating and cooling waste gas treatment device 31, and the Brownian fluid high-temperature heating and cooling waste gas treatment device 31 is connected to the melt gasification furnace 24.

[0043] When treating fly ash and sludge, the fly ash and sludge pretreatment unit 1 first pretreats them and presses them into spherical or block-shaped waste-derived fuels. Then the conveying system conveys the waste-derived fuel to the melt gasifier 24. The Brownian fluid high-temperature heating and cooling waste gas treatment device 31 provides the melt gasifier with heat that meets the temperature required for the redox reaction. The melt gasifier 24 generates a high-temperature spiral airflow to act on the waste-derived fuel, causing it to melt and gasify, generating high-temperature lava and waste gas. The high-temperature lava can be reused after resource processing and sorting, and the waste gas is further processed by the gas treatment unit 3 and discharged harmlessly.

[0044] The fly ash and sludge pretreatment unit 1, the melting gasification unit 2 and the gas treatment unit 3 of the present invention cooperate with each other, not only achieving significant fly ash and sludge treatment effects and achieving near-zero emissions of waste gas, waste liquid and waste, but also achieving resource recycling and environmental protection.

[0045] Embodiment 2:

[0046] Example 2 is based on Example 1:

[0047] like Figures 1 to 12 As shown, the fly ash and sludge pretreatment unit 1 includes a feed bin 11, a first pretreatment conveying device 12, a mixing device 13, a second pretreatment conveying device 14 and a ball press 15.

[0048] The feed bin 11 is used for feeding fly ash and sludge. The first pretreatment conveying device 12 adopts a screw conveying device, whose feed end is connected to the feed bin 11, and whose discharge end is connected to the feed port of the mixing device 13; the mixing device 13 adopts a rotary mixing device, which is provided with a strong oxidant injection port, and a spray device is provided at the position of the strong oxidant injection port; the second pretreatment conveying device 14 adopts a screw conveying device, whose feed end is connected to the discharge port of the mixing device 13, and whose discharge end is connected to the feed port of the ball press 15, and the discharge port of the ball press 15 is connected to the top of the feed end of the conveying system.

[0049] The fly ash and sludge pretreatment unit 1 uses a strong oxidant to stimulate the activity of alkali metal or alkaline earth metal salts in fly ash and sludge, dissolving them and then polymerizing them, and finally condensing and hardening them into low-carbon cementitious materials and carbon materials. During the mixing process, waste paper, straw, waste wood, etc. can be added according to the calorific value requirements and pressed into balls or blocks. After 24 hours of natural curing, the thermomechanical strength is improved to the following indicators: crushing strength M25≧83.0, M40≧72.0; wear resistance M10≦10.50; post-reaction strength CSR≧45; moisture content≦12%; the thermomechanical strength of the waste-derived fuel after pretreatment and solidification is CSR≧45.

[0050] The fly ash and sludge pretreatment unit 1 can solidify dioxins and heavy metals in the fly ash in the lattice structure of the stabilized soil, so that the comprehensive toxicity removal rate of the waste-derived fuel before entering the melt gasification furnace 24 can reach more than 75%. While increasing the thermomechanical strength of the spherical waste-derived fuel, its density is improved, which can slow down the gas release rate at low temperatures.

[0051] As an optional embodiment, the conveying system includes a vertical conveying device 21, a buffer silo 22 and a horizontal conveying device 23 which are sequentially arranged along the conveying direction.

[0052] The vertical conveying device 21 adopts an elevator, and its feeding end is connected to the fly ash and sludge pretreatment unit; the spherical waste-derived fuel formed by the briquette machine 15 is transported to the elevator in an arc manner, and the horizontal conveying device 23 adopts a screw conveyor, and its discharging end is connected to the melt gasification furnace 24. The vertical conveying device 21, the buffer silo 22 and the horizontal conveying device 23 cooperate with each other to achieve a significant waste-derived fuel transportation effect.

[0053] The vertical conveying device 21, the buffer silo 22 and the horizontal conveying device 23 are arranged in multiple groups, each group is relatively independent and can operate independently. Optionally, the number is set to two, which are distributed on the outside of the melter gasifier 24 at 90° intervals along the circumferential direction. The two groups of the conveying system are used in one and the other is reserved, which can realize continuous transportation and realize non-stop maintenance of the system.

[0054] In order to prevent the gas diversion of the depressurized expansion bag 25 , a double-layer damping type unloading plate is arranged in the buffer silo 22 .

[0055] As an optional embodiment, the melter-gasifier 24 is connected to an oxygen generator 28 .

[0056] The furnace wall of the melter-gasifier 24 is provided with a plurality of air inlet pipes 241 along the circumferential direction. The air inlet pipes 241 are arranged at an angle to the furnace wall of the melter-gasifier 24 , so that a spiral airflow can be generated to form a tornado shape.

[0057] As an optional embodiment, the melt-gasification unit 2 includes a circulating water cooling tank 26 and a magnetic separator 27 . The circulating water cooling tank 26 is disposed at the discharge end of the melt-gasification furnace 24 , and the magnetic separator 27 is connected to the circulating water cooling tank 26 .

[0058] After the waste-derived fuel is melted and gasified, the liquid high-temperature lava enters the circulating water cooling tank 26 for cooling, and the magnetic separator 27 separates the heat-resistant alloy for subsequent commercial use.

[0059] In the aforementioned cooling process, the solid substance produced is microcrystalline glass, and the gas produced is carbon monoxide. After being purified, the carbon monoxide can be used to extract hydrogen through the subsequent pressure swing adsorption hydrogen extraction device 38 or to supply electricity to the internal combustion generator 35.

[0060] Meanwhile, a large amount of water vapor is generated during the cooling process, which can be used to reduce dust during the operation of the melt-gasification furnace 24 .

[0061] As an optional embodiment, the pressure-reducing expansion bag 25 is connected to an exhaust branch 32, and the exhaust branch 32 is connected to a low-temperature plasma filter 36 through a connecting pipe 33. A gas shut-off valve is provided on the connecting pipe 33 between the connecting pipe 33 and the low-temperature plasma filter 36. A high-frequency filter 34 is provided on the exhaust branch 32. The high-frequency filter 34 is used to remove harmful substances such as sulfides, dioxins, and metal trace elements. Compared with traditional activated carbon filtration, it has a more superior gas purification effect.

[0062] There are at least two exhaust branches 32 , each exhaust branch 32 is provided with a high-frequency filter 34 , and all exhaust branches 32 are arranged in parallel.

[0063] Preferably, the number of exhaust branches 32 is set to two, one for use and one for backup, so as to achieve continuous treatment of fly ash and sludge.

[0064] Furthermore, the high-frequency filter 34 is provided with a pressure sensor, which can provide the internal airflow pressure to the control system in real time. When the high-frequency filter 34 is blocked, it is powered on and heated to 600°C, so that the oil, asphalt and other sticky substances blocked in the high-frequency filter 34 are thermally decomposed and gasified, thereby achieving the effect of automatic unblocking.

[0065] As an optional embodiment, the connecting pipe 33 is connected to an internal combustion generator 35 through a connecting branch. The internal combustion generator 35 burns the exhaust gas to provide electric energy for the Brownian fluid high-temperature heating and cooling exhaust gas treatment device 31.

[0066] The exhaust end of the internal combustion generator 35 is connected to the Brownian fluid high-temperature heating and cooling exhaust gas treatment device 31 through a pipeline. The Brownian fluid high-temperature heating and cooling exhaust gas treatment device 31 includes a heating section 312 and a cooling section 311.

[0067] A first accommodating chamber is provided inside the heating section 312, and a high-frequency electromagnetic heating device is provided in the first accommodating chamber. The high-frequency electromagnetic heating device includes a high-frequency induction power supply 313, a high-frequency coil 314, a ceramic insulating cylinder 315 and a high-frequency induction electrode sheet 317. The high-frequency induction power supply 313 is electrically connected to the high-frequency coil 314 through a cable. The high-frequency coil 314 is wound around the outside of the ceramic insulating cylinder 315. A high-frequency heating chamber and a Brownian motion reaction chamber are provided inside the ceramic insulating cylinder 315, wherein the section of the ceramic insulating cylinder 315 corresponding to the high-frequency coil 314 encloses the high-frequency heating chamber, and the ceramic The insulating cylinder 315 isolates the high-frequency coil 314 from the outside of the heating flow, which can prevent the coil from aging, avoid the decrease of its heat insulation ability, and increase the service life. A filter 316 is arranged in the high-frequency heating chamber. The filter 316 adopts a stainless steel filter. Its air inlet is connected to the exhaust end of the internal combustion generator 35 through a pipeline. The high-frequency induction electrode sheet 317 is embedded in the outer wall of the filter 316. Induction type same-frequency resonance heating is adopted. The outer wall of the ceramic insulating cylinder 315 does not have heat conduction effect. The Brownian motion reaction chamber is connected to a hot gas outlet pipeline, and the hot gas outlet pipeline is connected to the melting gasification furnace 24.

[0068] When the subsequent pressure swing adsorption hydrogen extraction process is not carried out, the gas shut-off valve is closed, and the exhaust gas discharged from the internal combustion generator 35 enters the high-frequency heating chamber. The high-frequency electromagnetic heating device generates high frequency to form a high-frequency electromagnetic field. By utilizing the same-frequency resonance of the high-frequency electromagnetic field, the molecules inside the exhaust gas are made to perform Brownian motion with violent collisions and irregular diffusion in the Brownian motion reaction chamber, thereby achieving instantaneous heating and completing high-temperature thermal decomposition. After that, part of the hot gas with a temperature of about 1000°C flows through the hot gas outlet pipeline into the melt gasification furnace 24, providing it with stable thermal energy.

[0069] The high-frequency electromagnetic heating device with a high-frequency heating chamber and a Brownian motion reaction chamber can instantly heat the exhaust gas in an oxygen-deficient atmosphere. On the one hand, the thermal decomposition of the exhaust gas is more complete, and it can efficiently decompose butadiene, vinyl acid polymers and volatile organic compounds such as benzo(a)pyrene (VOCs) in the exhaust gas, reducing the emission of unburned PM2.5 particulate matter, carbon dioxide, nitrogen oxides, sulfur dioxide and other pollutants. On the other hand, the same-frequency resonance of the high-frequency electromagnetic field can break up the dioxin molecular clusters in the oxygen-deficient atmosphere, greatly reducing the decomposition temperature of dioxins, and achieving significant energy-saving and consumption-reducing effects. At the same time, compared with the existing waste gas incineration secondary combustion chamber, it has a simple structure, low space occupancy, and low construction and use costs.

[0070] In addition, the exhaust gas discharged by the internal combustion generator 35 is usually at 450°C to 500°C, which has a preheating effect, can shorten the heating time of the exhaust gas in the high-frequency heating chamber, and also has the effect of increasing efficiency and saving energy.

[0071] An annular fresh air channel is arranged between the inner wall of the first accommodating cavity and the outer wall of the ceramic insulating cylinder 315, and a fresh air mixing inlet is arranged on the heating section 312 and connected with the fresh air channel. The fresh air mixing inlet and the annular fresh air channel are used for heat dissipation of the high-frequency electromagnetic heating device.

[0072] A second accommodating chamber is provided in the cooling section 311, and the hot gas outlet pipeline is connected to the second accommodating chamber through a pipeline. The second accommodating chamber includes a spray chamber and a cooling chamber. The spray chamber is connected to the hot gas outlet pipeline through a corresponding pipeline. An alkali liquid spray 318 is provided in the spray chamber. The alkali liquid spray 318 is used to neutralize or remove acidic gases. Acidic gases include sulfur oxides, nitrogen oxides, carbon dioxide, etc. A condenser 319 is provided in the cooling chamber. The cooling chamber is connected to the low-temperature plasma filter 36 through the cold gas outlet pipeline. The condenser 319 is S-shaped, which can increase the heat exchange area, extend the heat exchange time, and keep the exhaust temperature at 30-40°C.

[0073] As an optional embodiment, the gas processing unit 3 also includes a dust collector 37, and the low-temperature plasma filter 36 is connected to the dust collector 37. The dust collector 37 is connected to an exhaust pipe, and the dust collector 37 and the low-temperature plasma filter 36 cooperate with each other for gas purification.

[0074] As an optional embodiment, the gas processing unit 3 further includes a pressure swing adsorption hydrogen extraction device 38 , and the pressure swing adsorption hydrogen extraction device 38 includes an adsorber 381 , a hydrogen extraction compressor 382 and a hydrogen tank 383 .

[0075] The adsorber 381 is connected to a carbon monoxide intake pipe and a return pipe, the carbon monoxide intake pipe is connected to the exhaust pipe, and the return end of the return pipe is connected to the internal combustion generator 35; the hydrogen extraction compressor 382 is connected to the adsorber 381; and the hydrogen tank 383 is connected to the hydrogen extraction compressor 382.

[0076] The adsorber 381, hydrogen extraction compressor 382 and hydrogen tank 383 cooperate with each other to effectively extract and store hydrogen for subsequent resource utilization. At the same time, the setting of the reflux pipe can also transport the extracted hydrogen to the internal combustion generator 35 for power generation.

[0077] Example 3

[0078] The present invention provides a method for processing fly ash and sludge by ultra-high temperature melting and resource utilization, and the method for processing fly ash and sludge by ultra-high temperature melting and resource utilization comprises at least the following steps:

[0079] Pre-treating fly ash and sludge by a fly ash and sludge pre-treatment device and pressing them into waste-derived fuel in the form of pellets or blocks;

[0080] The waste-derived fuel is transported to the melter-gasifier 24 through a transport system, and the Brownian fluid high-temperature cooling waste gas treatment device provides heat energy for the melter-gasifier 24. The melter-gasifier 24 uses a constant-speed and quantitative high-temperature spiral airflow to satisfy its oxidation-reduction of the waste-derived fuel, generating liquid high-temperature lava and waste gas. The liquid high-temperature lava is discharged through the high-temperature lava slag outlet of the melter-gasifier 24 and processed as a resource;

[0081] The waste gas is processed by the gas processing unit 3 and then discharged.

[0082] In the process of treating the exhaust gas by the gas treatment unit 3, hydrogen can be extracted and stored by the pressure swing adsorption hydrogen extraction device 38, so as to facilitate the subsequent reuse of hydrogen resources.

[0083] In the description of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", "top", "bottom", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0084] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "multiple" or "several" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0085] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0086] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A fly ash and sludge coordinated ultra-high temperature melting resource processing device, characterized in that: It includes a fly ash and sludge pretreatment unit, a melting gasification unit and a gas treatment unit which are arranged in sequence, wherein: The fly ash and sludge pretreatment unit is used to pretreat fly ash and sludge and press them into waste-derived fuel in the form of pellets or blocks; The melt-gasification unit comprises a conveying system and a melt-gasification furnace, wherein the feed end of the conveying system is connected to the fly ash and sludge pretreatment unit, and the discharge end of the conveying system is connected to the melt-gasification furnace. The melt-gasification furnace utilizes a constant-speed and constant-quantity high-temperature spiral airflow to satisfy its oxidation-reduction of the waste-derived fuel. A pressure-reducing expansion bag is provided on the top of the melt-gasification furnace, and a high-temperature lava slag outlet is provided on the bottom of the melt-gasification furnace. The air inlet end of the gas processing unit is connected to the pressure-reducing expansion bag, the gas processing unit is provided with an exhaust port, and the gas processing unit includes a Brownian fluid high-temperature heating and cooling waste gas treatment device, and the Brownian fluid high-temperature heating and cooling waste gas treatment device is connected to the melter gasifier.

2. The fly ash and sludge coordinated ultra-high temperature melting resource processing device according to claim 1 is characterized in that: The fly ash and sludge pretreatment unit comprises a feed bin, a first pretreatment conveying device, a mixing device, a second pretreatment conveying device and a briquetting machine, wherein: The feed bin is used for feeding fly ash and sludge; The feed end of the first pretreatment conveying device is connected to the feed bin; The feed port of the mixing device is arranged at the discharge end of the first pretreatment conveying device, the discharge port of the mixing device is connected to the feed end of the second pretreatment conveying device, and the mixing device is provided with a strong oxidant injection port; The discharge end of the second pretreatment conveying device is connected to the feed port of the ball press; The discharge port of the ball press is located above the feed end of the conveying system.

3. The fly ash and sludge coordinated ultra-high temperature melting resource processing device according to claim 1 is characterized in that: The conveying system comprises a vertical conveying device, a buffer silo and a horizontal conveying device which are sequentially arranged along the conveying direction, wherein the feed end of the vertical conveying device is connected to the fly ash and sludge pretreatment unit; the discharge end of the horizontal conveying device is connected to the melter-gasifier; The number of the conveying systems is at least two.

4. The fly ash and sludge coordinated ultra-high temperature melting resource processing device according to claim 1 is characterized in that: The melt-gasification unit comprises an oxygen generator, and the oxygen generator is connected to the melt-gasification furnace; The furnace wall of the melter-gasifier is provided with a plurality of air inlet pipes along the circumferential direction.

5. The fly ash and sludge coordinated ultra-high temperature melting resource processing device according to claim 1 is characterized in that: The melt-gasification unit comprises a circulating water cooling tank and a magnetic separator, wherein: The circulating water cooling tank is arranged at the discharge end of the melt-gasification furnace; The magnetic separator is connected to the circulating water cooling tank and is used for separating the heat-resistant alloy.

6. The fly ash and sludge coordinated ultra-high temperature melting resource processing device according to claim 1 is characterized in that: The decompression expansion bag is connected to an exhaust branch, the exhaust branch is connected to a low-temperature plasma filter through a connecting pipe, and a high-frequency filter is arranged on the exhaust branch; There are at least two exhaust branches, each of which is provided with the high-frequency filter, and all the exhaust branches are connected in parallel.

7. The fly ash and sludge coordinated ultra-high temperature melting resource processing device according to claim 6 is characterized in that: The connecting pipeline is connected to an internal combustion generator through a connecting branch, and the internal combustion generator provides electric energy for the fly ash and sludge coordinated ultra-high temperature melting resource processing device; The Brownian fluid high-temperature heating and cooling waste gas treatment device includes a heating section and a cooling section. The heating section is connected to the melt gasification furnace through a hot gas outlet pipeline, and the cooling section is connected to the low-temperature plasma filter through a cold gas outlet pipeline.

8. The fly ash and sludge coordinated ultra-high temperature melting resource processing device according to claim 7 is characterized in that: The gas processing unit also includes a dust collector, wherein: The low-temperature plasma filter is connected to the dust collector; The dust collector is connected with an exhaust pipe.

9. According to the fly ash and sludge coordinated ultra-high temperature melting resource processing device of claim 8, the gas processing unit further comprises a pressure swing adsorption hydrogen extraction device, the pressure swing adsorption hydrogen extraction device comprises an adsorber, a hydrogen extraction compressor and a hydrogen tank, wherein: The adsorber is connected to a carbon monoxide intake pipe and a return pipe, the carbon monoxide intake pipe is connected to the exhaust pipe, and the return end of the return pipe is connected to the internal combustion generator; The hydrogen extraction compressor is connected to the adsorber; The hydrogen tank is connected to the hydrogen extraction compressor.

10. A method for processing fly ash and sludge by ultra-high temperature melting, characterized in that: At least the following steps are included: Pre-treating fly ash and sludge by a fly ash and sludge pre-treatment device and pressing them into waste-derived fuel in the form of pellets or blocks; The waste-derived fuel is transported to the melt-gasification furnace through a conveying system, and the Brownian fluid high-temperature cooling exhaust gas treatment device provides heat energy for the melt-gasification furnace. The melt-gasification furnace uses a constant-speed and quantitative high-temperature spiral airflow to satisfy its oxidation-reduction of the waste-derived fuel, generating liquid high-temperature lava and exhaust gas. The liquid high-temperature lava is discharged through the high-temperature lava slag outlet of the melt-gasification furnace and processed as a resource; The waste gas is treated by the gas treatment unit and then discharged.

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