Plasma treatment system for medical waste treatment and hydrogen recovery

Abstract

The utility model provides a plasma treatment system for medical waste treatment and hydrogen recovery. The system comprises a pretreatment and feeding system, a stock bin, a plasma gasification furnace, a waste heat boiler, an ash residue collection system, a tail gas treatment system, a hydrogen recovery system and a public and auxiliary system which are communicated in sequence, wherein a plasma generator is arranged at the middle lower part of the body of the plasma gasification furnace. According to the device, volume reduction, weight reduction and harmless treatment of medical wastes can be realized, and meanwhile, recyclable hydrogen is generated.

Description

Technical Field

[0001] The utility model relates to a plasma processing system for processing medical waste and recovering hydrogen. Background Art

[0002] Currently, medical waste is primarily treated using high-temperature steam, microwave sterilization, chemical treatment, and incineration. These three methods fail to achieve the desired reduction in waste volume; the treated waste remains solid waste and must be re-incinerated or recycled. Traditional incineration processes, however, leave residues and fly ash that remain hazardous waste, and they also incompletely burn, resulting in low volume reduction. Solidification processes and dedicated landfills are still necessary, and the environmental hazards of dioxin and heavy metal leaching cannot be avoided during this process.

[0003] Therefore, how to achieve harmless treatment, emission reduction and resource utilization of medical waste is an urgent problem that needs to be solved in this field. Utility Model Content

[0004] The technical problem addressed by this utility model is to provide a plasma treatment system for medical waste treatment and hydrogen recovery. This system aims to address the existing problems of incomplete medical waste combustion, low waste reduction, the need for a solidification process and dedicated landfills, and the environmental hazards of dioxin and heavy metal leaching. This plasma treatment system for medical waste treatment and hydrogen recovery achieves harmless treatment, waste reduction, and resource reuse.

[0005] To solve the above technical problems, the utility model provides a plasma treatment system for medical waste treatment and hydrogen recovery, characterized in that it includes a pretreatment and feeding system, a silo, a plasma gasification furnace, a waste heat boiler, an ash collection system, an exhaust gas treatment system, a hydrogen recovery system and a public auxiliary system (not shown in the figure) connected in sequence;

[0006] Wherein, a plasma generator is provided in the middle and lower part of the main body of the plasma gasification furnace.

[0007] In the present invention, the pretreatment and feeding system includes a crushing and high-temperature waste integrated machine (not shown in the figure), which is composed of a main body (not shown in the figure), a sealing door (not shown in the figure), a stirring mechanism (not shown in the figure), a crushing mechanism (not shown in the figure), a piping system (not shown in the figure) and a control system (not shown in the figure).

[0008] Preferably, the ash collection system includes a slag pool.

[0009] Preferably, the tail gas treatment system comprises a semi-dry deacidification quench tower, a bag-type dust collector, a cooler and a purification desulfurization tower.

[0010] Preferably, the hydrogen recovery system comprises a Roots blower, a gas storage tank, a compressor, a PSA-TSA hydrogen purification device and a hydrogen storage tank.

[0011] Preferably, the public auxiliary system comprises a steam boiler, a compressed air system, a nitrogen making system and a soft water system.

[0012] In the utility model, the plasma gasification furnace is an adiabatic reactor.

[0013] Preferably, the plasma gasification furnace is in the form of a vertical fixed-bed atmospheric gasification furnace.

[0014] Preferably, the components of the plasma gasification furnace comprise a furnace body (not shown in the figure), an inner lining feed inlet (not shown in the figure), temperature measuring points (not shown in the figure), a combustion gas port (not shown in the figure), a waste liquid injection port (not shown in the figure) and an observation port (not shown in the figure).

[0015] Preferably, the material of the inner wall (not shown in the figure) of the plasma gasification furnace is refractory material, further preferably light refractory insulation material, and more preferably acid-resistant, wear-resistant, high-temperature-resistant and alternating temperature stress-resistant refractory light insulation material.

[0016] Preferably, the material of the furnace body of the plasma gasification furnace is steel.

[0017] Preferably, the furnace body of the plasma gasification furnace adopts a cylindrical structure.

[0018] Preferably, the size of the plasma gasification furnace is φ1700*6500mm.

[0019] Preferably, six 200 kW plasma generators (4 with 2 spares) are arranged in the lower part of the plasma gasification furnace, and further four gasification lances (not shown in the figure) can be arranged. Metered compressed air enters the plasma generator and is ionized to form plasma, which is used to maintain the temperature of the melting zone of the plasma gasification furnace, and the melting temperature is above 1300 °C. Part of the energy required for the gasification and melting of medical waste comes from the plasma, and part comes from the heat released by the oxidation reaction of the medical waste itself.

[0020] Preferably, the lower part of the body of the plasma gasification furnace is a slag discharge nipple (not shown in the figure), which is provided with a desalted water cooling device (not shown in the figure) and its lower part is inserted into a slag pool.

[0021] Preferably, a slag discharge burner (not shown in the figure) is provided between the main body of the plasma gasification furnace and the slag discharge short section. The fuel used by the burner is preferably natural gas; the burner is cooled by air compressed by an air compressor.

[0022] Preferably, the plasma generator adopts a water-cooled non-transferred arc method, which has stable ignition, long cathode life, simple structure, small size, easy installation, simple maintenance, and higher electric-to-heat conversion efficiency than the common transferred arc method. The carrier air required by the plasma generator comes from the compressed air system (or a separate air compressor), and the air consumption of a single generator is 70Nm 3 / h.

[0023] Preferably, the plasma generator is connected to a compressed air system or a separately provided air compressor.

[0024] Preferably, the plasma generator is provided with a switching pneumatic ball valve (not shown in the figure), a pressure-stabilizing and reducing valve (not shown in the figure) and a pressure switch (not shown in the figure).

[0025] Preferably, the plasma generator uses water to cool the generator electrodes.

[0026] Among them, preferably, the plasma generator is connected to the cooling water system, and the cooling water system is preferably a closed-loop cooling water system, which consists of a water tank (not shown in the figure), two pipeline booster water pumps (not shown in the figure), a heat exchanger (not shown in the figure), related instruments (not shown in the figure) and a control cabinet (not shown in the figure).

[0027] Preferably, the plasma generator uses a high-power DC regulated current power supply, such as an IGBT tube high-frequency inverter switching DC power supply.

[0028] In the present utility model, the waste heat boiler adopts a horizontal heat exchange boiler.

[0029] Preferably, the outlet of the waste heat boiler is located at the bottom of the waste heat boiler.

[0030] In the present invention, an alkali solution atomizing spray gun is provided in the semi-dry deacidification quenching tower; the alkali solution atomizing spray gun is preferably connected to an alkali solution tank (not shown in the figure), and the alkali solution tank is provided with a valve (not shown in the figure).

[0031] Preferably, the inlet of the semi-dry deacidification and quenching tower is located at the bottom of the semi-dry deacidification and quenching tower, and the outlet of the semi-dry deacidification and quenching tower is located at the top of the semi-dry deacidification and quenching tower.

[0032] Preferably, the outlet of the waste heat boiler is connected to the inlet of the semi-dry deacidification quenching tower.

[0033] Preferably, the inlet of the bag filter is located at the top of the bag filter.

[0034] Preferably, the bag dust collector is provided with an external heat preservation device and a dust collection bin is provided at the bottom.

[0035] Preferably, the cooler is a shell-and-tube cooler.

[0036] Preferably, the inlet of the cooler is located at the top of the cooler, and the outlet of the cooler is located at the bottom of the cooler.

[0037] Preferably, a gas-liquid separator is provided at the cooler outlet.

[0038] Preferably, the inlet of the purification and desulfurization tower is located at the bottom of the purification and desulfurization tower, and the outlet of the purification and desulfurization tower is located at the top of the purification and desulfurization tower.

[0039] Preferably, the outlet of the cooler is connected to the inlet of the purification and desulfurization tower.

[0040] Preferably, the purification and desulfurization tower is provided with a drying layer (not shown in the figure), an activated carbon adsorption layer (not shown in the figure) and a desulfurization layer (not shown in the figure).

[0041] Preferably, the outlet of the purification and desulfurization tower is connected to the gas storage tank via a Roots blower.

[0042] Preferably, the gas storage tank is connected to the PSA-TSA hydrogen purification device via a compressor.

[0043] Preferably, the PSA-TSA hydrogen purification device is provided with a waste gas discharge device at the top and an outlet at the bottom.

[0044] Preferably, the outlet of the PSA-TSA hydrogen purification device is connected to a hydrogen storage tank.

[0045] The utility model provides a plasma treatment system for medical waste treatment and hydrogen recovery as described above, which includes a pretreatment and feeding system, a silo, a plasma gasification furnace, a waste heat boiler, a semi-dry deacidification quenching tower, a bag dust collector, a cooler, a purification and desulfurization tower, a Roots blower, a gas storage tank, a compressor, a PSA-TSA hydrogen purification device, and a hydrogen storage tank, which are connected in sequence;

[0046] Wherein, a plasma generator is provided in the middle and lower part of the main body of the plasma gasification furnace; the plasma generator is connected to an air compressor; the plasma generator is connected to a cooling water system; and a slag pool is provided at the lower part of the plasma gasification furnace.

[0047] The utility model also provides a plasma treatment system method for treating medical waste and recovering hydrogen, which is characterized in that it adopts the plasma treatment system for treating medical waste and recovering hydrogen as described above.

[0048] In the present invention, the working pressure of the pretreatment and feeding system is -250~3800 Pa.

[0049] Preferably, the operating temperature of the pretreatment and feeding system is -250~3800 Pa.

[0050] Preferably, the outlet temperature of the plasma gasification furnace is 850-1000°C.

[0051] Preferably, the melting temperature in the plasma gasification furnace is above 1300 °C.

[0052] Preferably, the gas consumption of a single plasma generator is 70 Nm 3 / h.

[0053] Preferably, in the water-cooled generator electrode, the cooling water is demineralized water.

[0054] Preferably, the inlet temperature of the waste heat boiler is 850-1000°C, for example 1000°C.

[0055] Preferably, the outlet temperature of the waste heat boiler is 400-600°C, for example 500°C.

[0056] In the present invention, the inlet temperature of the semi-dry deacidification quenching tower in the tail gas treatment system is 400-600°C, for example 500°C.

[0057] Preferably, the outlet temperature of the semi-dry deacidification quenching tower in the tail gas treatment system is 170-190°C, for example 180°C.

[0058] Preferably, the gas flow rate in the semi-dry deacidification quenching tower in the tail gas treatment system is 1-1.5 m / s, for example, 1.2 m / s.

[0059] Preferably, the quenching time of the semi-dry deacidification quenching tower in the tail gas treatment system is less than 1 second.

[0060] Preferably, the semi-dry deacidification quenching tower in the tail gas treatment system contains alkali solution, and the alkali solution is preferably a sodium bicarbonate solution.

[0061] Preferably, the inlet temperature of the bag filter in the exhaust gas treatment system is 170-190°C, for example 180°C.

[0062] Preferably, the outlet temperature of the bag filter in the exhaust gas treatment system is 170-190°C, for example 180°C.

[0063] Preferably, the filtration accuracy of the bag filter in the exhaust gas treatment system is 0.08-0.12 μm, for example, 0.1 μm.

[0064] Preferably, the inlet temperature of the cooler in the exhaust gas treatment system is 170-190°C, for example 180°C.

[0065] Preferably, the outlet temperature of the cooler in the exhaust gas treatment system is 40-60°C, for example 50°C.

[0066] Preferably, the cooling water inlet pressure of the cooler in the exhaust gas treatment system is 0.4-0.6 MPa, for example, 0.4 MPa.

[0067] Preferably, the cooling water return pressure of the cooler in the exhaust gas treatment system is 0.1-0.3 MPa, for example, 0.2 MPa.

[0068] Preferably, the heat exchange area of ​​the cooler in the exhaust gas treatment system is 3-5 m 2 , for example 4 m 2 .

[0069] In the present invention, the Roots blower in the hydrogen recovery system pressurizes the purified synthesis gas to 40-60 KPa, for example, 50 KPa.

[0070] Preferably, the compressor in the hydrogen recovery system increases the pressure of the purified synthesis gas to 1.0-3.0 MPa, for example, 2.0 MPa.

[0071] The utility model also provides an application of the plasma treatment system for treating medical waste and recovering hydrogen as described above in treating medical waste.

[0072] In this utility model, the plasma gasifier is used to pyrolyze and gasify medical waste. The lower portion of the plasma gasifier body is a slag discharge section, equipped with desalted water for cooling, and its lower portion (i.e., the lower slag skirt) is inserted into the slag pool to a certain depth. Molten glass formed by inorganic matter falls through the slag discharge section into the bottom slag pool, where it is rapidly cooled to form 2-5 mm glassy slag. This slag is regularly removed by a slag scoop, transported to external locations, and treated as general solid waste. A slag discharge burner is installed between the gasifier body and the slag discharge section, fueled by natural gas. The slag discharge burner ensures smooth liquid slag discharge, and all burners are cooled by compressed air.

[0073] The plasma gasification furnace includes a furnace body and a plasma generator located within the furnace body. The furnace body is used to receive the residue from the gasification furnace that has not been completely pyrolyzed and gasified. The plasma generator is used to heat the residue, cracking the organic matter in the residue to produce flue gas and crude synthesis gas, and melting the inorganic matter in the residue into liquid vitreous slag. The flue gas and crude synthesis gas are directly fed into the waste heat boiler, where the heat is recovered. The superheated steam generated by the waste heat boiler can be used for high-temperature disinfection and drying of medical waste pretreatment.

[0074] The cooled syngas enters the semi-dry deacidification quench tower from the bottom. Inside the tower, several alkali atomizing spray guns are installed. Alkali (a sodium bicarbonate solution of a certain concentration) is pumped from a alkali tank into the spray guns, with the alkali flow rate controlled by a valve. Syngas entering the tower from the bottom moves upward, meeting the atomized alkali sprayed downward from the top. Acidic gases such as HCl and H2S are removed from the syngas, rapidly reducing its temperature.

[0075] The cooled synthesis gas enters the bag dust collector to collect fine ash in the gas. The dust collector is provided with external insulation and an ash collection bin is provided at the bottom.

[0076] The gas after ash removal enters the (shell and tube) cooler and is cooled to 50°C. A gas-liquid separator is installed at the cooler outlet, and the condensed water is discharged into the wastewater pipe and enters the sewage system.

[0077] The cooled gas then enters the purification and desulfurization tower, which is equipped with a drying layer, an activated carbon adsorption layer, and a desulfurization layer to remove a small amount of water vapor and trace amounts of sulfides and heavy metal compounds in the gas, thereby avoiding poisoning of the adsorption catalyst of the back-end PSA-TSA hydrogen purification device.

[0078] The gas is pressurized by a Roots blower (the Roots blower provides a micro-negative pressure environment for the plasma gasification furnace and provides power for the plasma gasification melting system), enters a gas storage tank, is pressurized by a compressor (the hydrogen compressor is used to provide power for the PSA-TSA hydrogen purification device), enters the PSA-TSA hydrogen purification device to purify and separate H2 and other gases, the waste gas containing CO enters a flare system, and H2 enters a hydrogen storage tank for storage. The hydrogen in the hydrogen storage tank can provide power for hydrogen fuel cell vehicles such as hydrogen buses and hydrogen heavy trucks through a hydrogen filling station, or can be introduced into a large hydrogen fuel cell energy storage system for power storage.

[0079] On the basis of common sense in the art, the above-mentioned preferred conditions can be combined arbitrarily, that is, to obtain each preferred example of the present application.

[0080] The reagents and raw materials used in the present application are commercially available.

[0081] The positive progress effect of the present application is that the plasma treatment system for medical waste treatment and hydrogen recovery can realize harmless treatment, emission reduction and resource recycling of medical waste. BRIEF DESCRIPTION OF DRAWINGS

[0082] Figure 1 Process flow diagram of the plasma gasification melting hydrogen production system of Example 1

[0083] REFERENCE SIGNS

[0084] Pretreatment and feeding system 0

[0085] Silo 1

[0086] Plasma gasification furnace 2

[0087] Air compressor 3

[0088] Plasma generator 4

[0089] Slag pool 5

[0090] Waste heat boiler 6

[0091] Semi-dry deacidification quench tower 7

[0092] Bag-type dust collector 8

[0093] Cooler 9

[0094] Purification desulfurization tower 10

[0095] Roots blower 11

[0096] Gas storage tank 12

[0097] Compressor 13

[0098] PSA-TSA hydrogen purification unit 14

[0099] Hydrogen storage tank 15

[0100] Exhaust gas treatment system 16

[0101] Hydrogen recovery system 17

[0102] Ash collection system 18 DETAILED DESCRIPTION

[0103] A preferred embodiment is given below, and the present invention is described more clearly and completely in conjunction with the accompanying drawings.

[0104] Composition of medical waste

[0105] Medical waste comes from a wide range of sources and is complex in composition. It can be divided into ten major categories: disposable plastics, disposable paper products, disposable rubber products, disposable testers, laboratory waste, surgical waste, animal testing specimens, wastewater treatment sludge, dressings, and expired pharmaceuticals. These ten categories can be further divided into two main groups: inorganic and organic. The composition and calorific value of medical waste vary significantly between cities and hospitals. Calorific value is closely linked to the organic content. Waste high in plastic and fiber has a relatively high calorific value, while waste high in glass and moisture has a relatively low calorific value.

[0106] Medical waste composition analysis

[0107] 1) The analytical data of typical components in medical waste are shown in Table 1 below:

[0108] Table 1:

[0109]

[0110] 2) Material data is based on the medical waste analysis data from a certain place in China:

[0111] Table 2: Physical and chemical characteristics of medical waste

[0112]

[0113] Table 3: Composition of medical waste

[0114]

[0115] Table 4: Industrial and elemental analysis of medical waste

[0116]

[0117] Example 1

[0118] like Figure 1As shown, embodiment 1 provides a plasma treatment system for medical waste treatment and hydrogen recovery, which comprises a pretreatment and feeding system 0, a bunker 1, a plasma gasification furnace 2, a waste heat boiler 6, a semi-dry deacidification quench tower 7, a bag-type dust collector 8, a cooler 9, a purification desulfurization tower 10, a Roots blower 11, a gas storage tank 12, a compressor 13, a PSA-TSA hydrogen purification device 14, and a hydrogen storage tank 15 connected in sequence.

[0119] The lower middle part of the plasma gasification furnace 2 body is provided with a plasma generator 4.

[0120] The lower part of the plasma gasification furnace 2 is provided with a slag pool 5.

[0121] The plasma generator 4 is connected with the air compressor 3.

[0122] 1. Pretreatment and feeding system

[0123] The medical waste is sent into the crushing and high-temperature waste all-in-one machine by the elevator, and the all-in-one machine is composed of a main body, a sealing door, a stirring mechanism, a crushing mechanism, a pipeline system, a control system and the like (not shown in the figure). The main body is a stainless steel circular vertical structure. The specific structural parameters are shown in Table 5.

[0124] Table 5: Main parameters of the pretreatment and feeding system

[0125]

[0126] 2. Plasma gasification furnace, air compressor, cooling water and slag pool

[0127] The plasma gasification furnace comprises a furnace body and a plasma generator arranged in the furnace body, the furnace body is used for receiving residual waste in the gasification furnace which is not completely pyrolyzed and gasified, and the plasma generator is used for heating the residual waste, cracking organic matter in the residual waste to generate flue gas and crude synthesis gas, and melting inorganic matter in the residual waste into liquid glass body slag, and the glass body slag is discharged into the slag pool.

[0128] The plasma gasification furnace is in the form of a vertical fixed-bed atmospheric gasification furnace, and the main components include: the furnace body is rolled from steel plates, lined with acid-resistant, wear-resistant, high-temperature-resistant and alternating temperature stress-resistant refractory materials, and provided with a feeding port, a temperature measuring point, a combustion gas port, a waste liquid injection port, an observation port and the like in the furnace. The furnace body adopts a cylindrical structure, the outer shell is made of steel plates, lined with light refractory insulation materials, which can effectively reduce the heat transmission outside the furnace. The inner wall is built with high temperature-resistant and corrosion-resistant materials, which can work reliably at high temperature for a long time. The size of the plasma gasification furnace is φ1700×6500mm.

[0129] The material is gasified and cracked until the gas exits, where it remains for at least 2 seconds. This ensures that the organic components of the waste have sufficient energy and reaction time to completely gasify and crack into small molecules, forming combustible syngas (CO, H2, etc.). The reaction zone within the furnace is heated to over 1200°C, and the atmosphere is reducing, avoiding the reaction zone where dioxins are generated.

[0130] The main parameters of the plasma gasification furnace are described in Table 6 below.

[0131] Table 6: Main parameters of plasma gasification furnace

[0132]

[0133] Example 1:

[0134]

[0135] 3. Waste heat boiler

[0136] This system utilizes a horizontally mounted heat exchange boiler. The waste heat boiler recovers heat from the high-temperature syngas and simultaneously cools the flue gas, reducing the temperature of the 1000°C syngas to approximately 500°C. The resulting superheated steam can be used for high-temperature sterilization and drying processes in the medical waste pretreatment process.

[0137] Table 7: Waste Heat Boiler Parameters

[0138]

[0139] 4. Exhaust gas treatment system

[0140] The tail gas treatment system adopts semi-dry deacidification quenching tower + bag dust collector + cooler + purification desulfurization tower

[0141] (1) Semi-dry deacidification quenching tower

[0142] The quench tower consists of a quench tower shell, a two-fluid spray system, and a water supply system (not shown). It also includes equipment for preparing and supplying a deacidification and alkali solution. The quench tower is primarily used to remove acidic gaseous pollutants from syngas. The inlet syngas temperature is 500°C, and the outlet temperature is less than 200°C. A NaHCO3 solution is sprayed to remove most of the acidic substances in the flue gas.

[0143] Under the action of compressed air, the slurry is atomized by the atomizing nozzle. Its structure is a double-layer jacketed tube. The absorbent slurry goes through the inner tube and the compressed air goes through the outer tube. The slurry and compressed air are strongly mixed at the nozzle and then sprayed out from the atomizer nozzle, so that the slurry is atomized into fine particles, which are fully contacted and absorbed by the gas.

[0144] The preparation and supply device of deacidification alkali solution comprises an intermediate tank of deacidification alkali solution and conveying equipment. In the NaHCO3 solution preparation tank, water is stirred to prepare a solution with a certain concentration. The solution is sent to the atomizer nozzle (not shown in the figure) by the liquid pump, and is fully atomized under the action of compressed air. The alkali solution tank is provided with two tanks, one for preparation and one for feeding, which are operated alternately. The alkali solution preparation tank is provided with a stirrer and an electric heater.

[0145] To prevent the quenching tower from being corroded by acid gas, a double-layer structure is adopted inside, and a corrosion-resistant, high-temperature-resistant and fire-resistant material is used on the flue gas contact surface.

[0146] Table 8: Semi-dry deacidification quenching tower parameters

[0147]

[0148] (2) Bag filter

[0149] The dust collector adopts a conventional bag filter, and the whole system is composed of a bag filter, a pulse dust cleaning system, a pipeline and control instruments (not shown in the figure). The synthesis gas from the semi-dry deacidification quenching tower is cooled to 180°C and enters the bag filter. The synthesis gas enters from the outside of the filter bag and is discharged from the top of the bin. Most of the fly ash and particulate matter adhere to the surface of the filter bag. The fly ash adhering to the outer surface of the filter bag is blown into the dust collector hopper by compressed air. The dust cleaning method of the bag filter is pulse blowback, which can be cleaned online or offline.

[0150] Table 9: Bag filter parameters

[0151]

[0152] (3) Cooler

[0153] The cooler adopts a shell-and-tube heat exchanger. The synthesis gas and the cooling water are countercurrently cooled and exchanged, the synthesis gas is cooled from 180°C to 50°C in the shell, and the cooling water is in the tube. The cooling water uses closed circulation cooling water.

[0154] Table 10: Main parameters of the cooler

[0155]

Claims

1. A plasma treatment system for medical waste treatment and hydrogen recovery, characterized in that: It includes a pretreatment and feeding system, a silo, a plasma gasification furnace, a waste heat boiler, an ash collection system, a tail gas treatment system, a hydrogen recovery system and a public auxiliary system that are connected in sequence; Wherein, a plasma generator is provided in the middle and lower part of the main body of the plasma gasification furnace.

2. The plasma treatment system for medical waste treatment and hydrogen recovery according to claim 1, characterized in that: The plasma treatment system for medical waste treatment and hydrogen recovery meets one or more of the following conditions: (1) The pretreatment and feeding system includes a crushing and high-temperature waste integrated machine, which consists of a main body, a sealing door, a stirring mechanism, a crushing mechanism, a piping system, and a control system; (2) The ash collection system includes a slag pool; (3) The tail gas treatment system includes a semi-dry deacidification quenching tower, a bag dust collector, a cooler and a purification desulfurization tower; (4) The hydrogen recovery system includes a Roots blower, a gas storage tank, a compressor, a PSA-TSA hydrogen purification device and a hydrogen storage tank; and (5) the public auxiliary system includes a steam boiler, a compressed air system, a nitrogen production system, and a soft water system.

3. The plasma treatment system for medical waste treatment and hydrogen recovery according to claim 1, characterized in that: The plasma treatment system for medical waste treatment and hydrogen recovery meets one or more of the following conditions: (1) The plasma gasification furnace is an adiabatic reactor, (2) The plasma gasification furnace is in the form of a vertical fixed-bed atmospheric pressure gasification furnace; (3) The components of the plasma gasification furnace include: a furnace body, a lining feed port, a temperature measuring point, a combustion gas port, a waste liquid injection port and an observation port; (4) The material of the inner wall of the plasma gasification furnace is refractory material; (5) The material of the furnace body of the plasma gasification furnace is steel; (6) The furnace body of the plasma gasification furnace adopts a cylindrical structure; (7) The size of the plasma gasification furnace is (8) Six 200kW plasma generators are provided in the lower part of the plasma gasification furnace, and further four gasification lances may be provided; (9) The lower part of the plasma gasification furnace body is a slag discharge short section, which is provided with a desalted water cooling device and its lower part is inserted into the slag pool; (10) The plasma generator adopts a water-cooled non-transferred arc method; (11) The plasma generator is connected to a compressed air system or a separately provided air compressor; (12) The plasma generator is provided with a switch pneumatic ball valve, a pressure stabilizing and reducing valve and a pressure switch; (13) The plasma generator uses water to cool the generator electrodes; (14) The plasma generator is connected to a cooling water system; And (15) the plasma generator uses a high-power DC regulated current power supply.

4. The plasma treatment system for medical waste treatment and hydrogen recovery according to claim 3, characterized in that: The material of the inner wall of the plasma gasification furnace is a light refractory heat-insulating material.

5. The plasma treatment system for medical waste treatment and hydrogen recovery according to claim 3, characterized in that: The material of the inner wall of the plasma gasification furnace is a fire-resistant lightweight thermal insulation material that is acid-resistant, wear-resistant, high-temperature-resistant and resistant to alternating temperature stress.

6. The plasma treatment system for medical waste treatment and hydrogen recovery according to claim 3, characterized in that: A slag discharge burner is provided between the main body of the plasma gasification furnace and the slag discharge short section; the burner is cooled by air compressed by an air compressor.

7. The plasma treatment system for medical waste treatment and hydrogen recovery according to claim 6, characterized in that: The fuel used by the burner is natural gas.

8. The plasma treatment system for medical waste treatment and hydrogen recovery according to claim 3, characterized in that: The cooling water system is a closed-loop cooling water system, which consists of a water tank, two pipeline booster water pumps, a heat exchanger, related instruments and a control cabinet.

9. The plasma treatment system for medical waste treatment and hydrogen recovery according to claim 3, characterized in that: The plasma generator adopts an IGBT tube high-frequency inverter switch direct current power supply.

10. The plasma treatment system for medical waste treatment and hydrogen recovery according to claim 1, characterized in that: The plasma treatment system for medical waste treatment and hydrogen recovery meets one or both of the following conditions: (1) The waste heat boiler adopts a horizontal heat exchange boiler; and (2) the outlet of the waste heat boiler is located at the bottom of the waste heat boiler.

11. The plasma treatment system for medical waste treatment and hydrogen recovery according to claim 2, characterized in that: The plasma treatment system for medical waste treatment and hydrogen recovery meets one or more of the following conditions: (1) An alkali liquid atomizing spray gun is provided in the semi-dry deacidification quenching tower; the alkali liquid atomizing spray gun can be connected to an alkali liquid tank, and the alkali liquid tank is provided with a valve; (2) the inlet of the semi-dry deacidification and quenching tower is located at the bottom of the semi-dry deacidification and quenching tower, and the outlet of the semi-dry deacidification and quenching tower is located at the top of the semi-dry deacidification and quenching tower; (3) The outlet of the waste heat boiler is connected to the inlet of the semi-dry deacidification quenching tower; (4) The inlet of the bag filter is located at the top of the bag filter; (5) The bag filter is provided with an external heat preservation device and a dust collection bin is provided at the bottom; (6) The cooler is a shell and tube cooler; (7) The inlet of the cooler is located at the top of the cooler, and the outlet of the cooler is located at the bottom of the cooler; (8) A gas-liquid separator is provided at the outlet of the cooler; (9) The inlet of the purification desulfurization tower is located at the bottom of the purification desulfurization tower, and the outlet of the purification desulfurization tower is located at the top of the purification desulfurization tower; (10) The outlet of the cooler is connected to the inlet of the purification and desulfurization tower; (11) The purification and desulfurization tower is provided with a drying layer, an activated carbon adsorption layer and a desulfurization layer; (12) The outlet of the purification and desulfurization tower is connected to the gas storage tank through a Roots blower; (13) The gas storage tank is connected to the PSA-TSA hydrogen purification device through a compressor; (14) The PSA-TSA hydrogen purification device is provided with an exhaust gas discharge device at the top and an outlet at the bottom; The outlet of the PSA-TSA hydrogen purification device described in (15) is connected to the hydrogen storage tank.

12. A plasma treatment system for medical waste treatment and hydrogen recovery, characterized in that: It includes a pretreatment and feeding system, a silo, a plasma gasifier, a waste heat boiler, a semi-dry deacidification quenching tower, a bag dust collector, a cooler, a purification and desulfurization tower, a Roots blower, a gas storage tank, a compressor, a PSA-TSA hydrogen purification device, and a hydrogen storage tank, which are connected in sequence; Wherein, a plasma generator is provided in the middle and lower part of the main body of the plasma gasification furnace; the plasma generator is connected to an air compressor; the plasma generator is connected to a cooling water system; and a slag pool is provided at the lower part of the plasma gasification furnace.

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