Plasma ignition device and small medical waste rapid pyrolysis system

Abstract

The invention provides a plasma ignition device and a small medical waste rapid pyrolysis system, and the plasma ignition device comprises a mobile platform; the power supply device is mounted on the mobile platform; the plasma igniter is mounted on the mobile platform, and the plasma igniter is suitable for spraying plasmas under the action of the power supply device; wherein the mobile platform is suitable for adjusting the position of the plasma igniter relative to pyrolysis furnaces of different medical waste rapid pyrolysis systems in the height direction and the horizontal direction, so that a nozzle of the plasma igniter extends into the pyrolysis furnace to spray plasmas into the pyrolysis furnace and ignite medical waste in the pyrolysis furnace; and the starting and heating time of the small medical waste rapid pyrolysis system can be shortened.

Description

Technical Field

[0001] At least one embodiment of the present disclosure relates to the technical field of medical waste treatment, and in particular to a plasma ignition device and a small-scale medical waste rapid pyrolysis system. Background Art

[0002] Medical waste refers to waste that is directly or indirectly infectious, toxic or otherwise harmful, generated by medical institutions in the course of medical treatment, prevention, health care and other related activities. Medical waste is infectious and is an important component of hazardous waste. In major public health emergencies, medical waste generally shows the characteristics of large-scale increase in a short period of time, stronger infectiousness, concentrated sources and complex composition, which requires the medical waste environmental management system to have sufficient disposal capacity and rapid emergency response capabilities.

[0003] In recent years, a pollution prevention and control technology pattern has been initially formed in the relevant technologies, with centralized disposal as the core, and incineration technology (rotary kiln, fixed bed) and non-incineration technology (high-temperature steam, chemical, microwave, high-temperature dry heat, etc.) coexisting. Compared with non-incineration technology, pyrolysis incineration is more in line with the needs of small-scale in-situ disposal due to its thorough disinfection and sterilization and high degree of reduction. It is conducive to solving the problems of wide dispersion of medical waste, high collection and transportation risks, and flexible disposal capacity under grassroots or public health emergencies.

[0004] Pyrolysis gasifiers in related technologies mostly use diesel, heavy oil, waste oil, methanol and other fuels for ignition, but they have problems such as large fuel consumption, inconvenient transportation, high operating costs, and the use process affects the operation effect of the purification equipment of the subsequent system, as well as slow heating rate in the initial stage of ignition and incomplete fuel combustion. Summary of the invention

[0005] In view of this, the present disclosure provides a plasma ignition device that can be adapted to different small-scale medical waste rapid pyrolysis systems and shorten the startup and heating time of the small-scale medical waste rapid pyrolysis systems.

[0006] As one aspect of the embodiments of the present disclosure, a plasma ignition device is provided, comprising a mobile platform, an arc striking device and a plasma igniter. A power supply device is mounted on the mobile platform, and a plasma igniter is mounted on the mobile platform. The plasma igniter is adapted to spray plasma under the action of the power supply device. The mobile platform is adapted to adjust the position of the plasma igniter relative to the pyrolysis furnace of different medical waste rapid pyrolysis systems in the height direction and the horizontal direction, so that the nozzle of the plasma igniter extends into the pyrolysis furnace, so as to spray the plasma into the pyrolysis furnace and ignite the medical waste in the pyrolysis furnace.

[0007] According to an embodiment of the present disclosure, the plasma ignition device further includes a heat supply pipe and a blower. The heat supply pipe passes through the opposite sides of the arc striking device, and the end of the plasma igniter opposite to the nozzle is installed at one end of the heat supply pipe. The blower is installed at the other end of the heat supply pipe and is suitable for blowing air into the heat supply pipe. An air duct is formed between the heat supply pipe and the plasma igniter, so that the heat generated by the plasma igniter is blown into the pyrolysis furnace through the blower.

[0008] According to an embodiment of the present disclosure, one end of the heat delivery pipe connected to the plasma igniter is configured to be retractable along the length direction of the heat delivery pipe to adjust the depth of the plasma igniter extending into the pyrolysis furnace.

[0009] According to an embodiment of the present disclosure, the mobile platform includes a base, a plurality of universal wheels and a plurality of lifters. The plurality of universal wheels are installed at intervals on the lower surface of the base, and are suitable for adjusting the horizontal position of the plasma igniter relative to the pyrolysis furnace. The plurality of lifters are installed between the lower surface of the base and the plurality of universal wheels, and are suitable for adjusting the height of the plasma igniter.

[0010] According to an embodiment of the present disclosure, the plasma igniter includes a first shell, an anode, a cathode and an arc-starting device. The first shell has an air inlet pipe, and the external working gas is input into the first shell from the air inlet pipe. The cathode is arranged in the first shell, and the anode is arranged in the first shell. The arc-starting device is suitable for generating an arc-starting pulse under the action of a power supply device at the initial stage of ignition to break through the working gas between the cathode and the anode. Under the action of the arc-starting pulse, the electric field formed by the anode and the cathode ionizes the working gas in the electric field to generate plasma.

[0011] According to an embodiment of the present disclosure, the arc striking device comprises a second housing, a main power supply and a rectifier. The main power supply is installed in the second housing and is used to provide direct current. The rectifier is installed in the second housing and is used to invert the direct current into alternating current. The arc striking head of the arc striking device extends through the cathode into the space between the anode and the cathode, and is used to generate the arc striking pulse under the action of the alternating current.

[0012] As another aspect of the embodiments of the present disclosure, a small-scale medical waste rapid pyrolysis system with plasma ignition is provided, comprising: a temperature maintaining component, a pyrolysis furnace and any one of the above-mentioned plasma ignition devices. A storage space is formed inside the pyrolysis furnace, and the above-mentioned pyrolysis furnace is rotatably arranged on the above-mentioned temperature maintaining component, and the above-mentioned pyrolysis furnace has an ignition port that can be opened and closed. Among them, the moving platform of the above-mentioned plasma ignition device is adjusted so that the plasma igniter extends into the above-mentioned storage space through the above-mentioned ignition port, so as to spray plasma into the above-mentioned storage space, ignite the medical waste in the storage space, make the temperature in the above-mentioned storage space rise to the pyrolysis temperature, and maintain the above-mentioned pyrolysis temperature through the above-mentioned temperature maintaining component, so as to provide pyrolysis conditions for the medical waste that subsequently enters the above-mentioned storage space.

[0013] According to an embodiment of the present disclosure, the pyrolysis furnace includes an inner shell and an outer shell. The inner shell forms the accommodation space, and the inner shell is rotatably disposed on the temperature maintaining assembly. The outer shell is statically sleeved on the periphery of the inner shell relative to the temperature maintaining assembly, and a flue is formed between the outer shell and the inner shell. The temperature maintaining assembly is suitable for burning fuel to generate flue gas, and the flue gas provides heat to the accommodation space via the flue, so that the accommodation space is maintained at the pyrolysis temperature. After exchanging heat with the inner shell, the flue gas is discharged from the outlet located on the outer shell.

[0014] According to an embodiment of the present disclosure, the pyrolysis furnace further comprises a heat-insulating layer, which is statically sleeved in the outer shell relative to the temperature-maintaining assembly, wherein the flue is located between the heat-insulating layer and the inner shell.

[0015] According to an embodiment of the present disclosure, the two ends of the pyrolysis furnace are respectively provided with a first end cover and a second end cover that are stationary relative to the temperature maintaining assembly, and the pyrolysis furnace is rotatably installed between the first end cover and the second end cover. The first end cover is provided with a feed port, and the feed port is suitable for transferring medical waste from the outside into the pyrolysis furnace, and the second end cover is provided with a discharge port. Among them, the ignition port is provided on the first end cover, the pyrolysis furnace is obliquely installed on the temperature maintaining assembly, and the end provided with the feed port is higher than the end provided with the discharge port, so that the pyrolysis products and pyrolysis gases of the medical waste after pyrolysis are gradually moved to the discharge port during the rotation of the pyrolysis furnace, and discharged from the discharge port.

[0016] According to the plasma ignition device of the embodiment of the present disclosure, the position of the plasma igniter relative to the pyrolysis furnace of different medical waste rapid pyrolysis systems can be adjusted through a mobile platform that can be adjusted in the height direction and the horizontal direction, so that the nozzle of the plasma igniter extends into the pyrolysis furnace, sprays high-temperature plasma into the pyrolysis furnace, and ignites the medical waste in the pyrolysis furnace, so that the plasma ignition device can be adapted to different small medical waste rapid pyrolysis systems. The startup and heating time of the small medical waste rapid pyrolysis system is shortened, and the disposal efficiency of medical waste is improved. The plasma ignition device can be quickly deployed to different locations by setting a movable platform, so as to adapt to the decentralized medical waste treatment needs and reduce the risks of medical waste during transportation. In addition, the same set of plasma ignition devices can be used in multiple locations, which improves the utilization rate and treatment range of the plasma ignition device, and can cope with the problems of wide dispersion of medical waste, high collection and transportation risks, and weak flexible disposal capabilities in special scenarios such as grassroots and sudden health conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0018] Figure 1 A perspective view of a plasma ignition device according to an embodiment of the present disclosure is schematically shown;

[0019] Figure 2 A partial cross-sectional view of a plasma igniter according to an embodiment of the present disclosure is schematically shown;

[0020] Figure 3 A perspective view of a mounting portion according to an embodiment of the present disclosure is schematically shown;

[0021] Figure 4 A cross-sectional view of a mounting portion according to an embodiment of the present disclosure is schematically shown;

[0022] Figure 5 A partial half-section side view of a small-scale medical waste rapid pyrolysis system according to an embodiment of the present disclosure is schematically shown.

[0023] The following are the descriptions of the reference numerals:

[0024] 1- Plasma ignition device;

[0025] 11- Mobile platform;

[0026] 111- base;

[0027] 112-Universal wheel;

[0028] 113-lifter;

[0029] 12- Power supply device;

[0030] 121- second housing;

[0031] 13- Plasma igniter;

[0032] 131-nozzle;

[0033] 132- cathode;

[0034] 133- anode;

[0035] 134-intake pipe;

[0036] 135-arc starting head;

[0037] 136- magnetic field coil;

[0038] 14-heat delivery pipeline;

[0039] 141-main body;

[0040] 142-installation part;

[0041] 143-support frame;

[0042] 1431-Inner ring;

[0043] 1432-outer ring;

[0044] 1433-Connector;

[0045] 144-fixing parts;

[0046] 1441-Fixing hole

[0047] 145-air duct;

[0048] 15- Blower;

[0049] 16-Protective net;

[0050] 2- Temperature maintenance components;

[0051] 21-burner;

[0052] 3- Pyrolysis furnace;

[0053] 31-inner shell;

[0054] 32-housing;

[0055] 33- insulation layer;

[0056] 34-first end cover;

[0057] 341-feeding port;

[0058] 35- second end cover;

[0059] 351-discharging port;

[0060] 36- Flue;

[0061] 37- driving motor;

[0062] 38- Transmission belt. DETAILED DESCRIPTION

[0063] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0064] The terms used herein are only for describing specific embodiments and are not intended to limit the present disclosure. The terms "comprise", "include", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0065] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification, and should not be interpreted in an idealized or overly rigid manner.

[0066] When using expressions such as "at least one of A, B, and C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, and C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc. When using expressions such as "at least one of A, B, or C, etc.", it should generally be interpreted as the meaning of the expression generally understood by those skilled in the art. For example, "a system having at least one of A, B, or C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or A, B, C, etc.

[0067] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only reference directions of the drawings and are not intended to limit the scope of protection of the present disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or configurations will be omitted when they may cause confusion in the understanding of the present disclosure.

[0068] Figure 1 A perspective view of a plasma ignition device according to an embodiment of the present disclosure is schematically shown. Figure 2 A partial cross-sectional view of a plasma igniter according to an embodiment of the present disclosure is schematically shown.

[0069] As one aspect of the embodiments of the present disclosure, a plasma ignition device 1 is provided. Figure 1 and Figure 2 As shown, the plasma ignition device 1 includes a mobile platform 11, a power supply device 12 and a plasma igniter 13. The power supply device 12 is installed on the mobile platform 11, and the plasma igniter 13 is installed on the mobile platform 11. The plasma igniter 13 is suitable for spraying plasma under the action of the power supply device 12. Among them, the mobile platform 11 is suitable for adjusting the position of the plasma igniter 13 relative to the pyrolysis furnace 3 of different medical waste rapid pyrolysis systems in the height direction and the horizontal direction, so that the nozzle 131 of the plasma igniter 13 extends into the pyrolysis furnace 3, so as to spray plasma into the pyrolysis furnace 3 and ignite the medical waste in the pyrolysis furnace 3.

[0070] According to the plasma ignition device 1 of the embodiment of the present disclosure, the position of the plasma igniter 13 relative to the pyrolysis furnace 3 of different medical waste rapid pyrolysis systems can be adjusted through the mobile platform 11 that can be adjusted in the height direction and the horizontal direction, so that the nozzle 131 of the plasma igniter 13 extends into the pyrolysis furnace 3, sprays high-temperature plasma into the pyrolysis furnace 3, and ignites the medical waste in the pyrolysis furnace 3, so that the plasma ignition device 1 can be adapted to different small medical waste rapid pyrolysis systems. The startup and heating time of the small medical waste rapid pyrolysis system is shortened, and the disposal efficiency of medical waste is improved. The plasma ignition device 1 can be quickly deployed to different locations by setting the movable platform 11, so as to adapt to the decentralized medical waste treatment needs and reduce the risks of medical waste during transportation. In addition, the same set of plasma ignition devices 1 can be used at multiple locations, which improves the utilization rate and treatment range of the plasma ignition device 1, and can cope with the problems of wide dispersion of medical waste, high collection and transportation risks, and weak flexible disposal capabilities in special scenarios such as grassroots and sudden health conditions.

[0071] According to the embodiments of the present disclosure, the plasma temperature is extremely high, reaching tens of thousands of degrees Celsius, and can quickly heat medical waste to the temperature required for pyrolysis (usually 500-850°C), shortening the startup and heating time.

[0072] According to the embodiments of the present disclosure, the plasma ignition device 1 can achieve rapid start and stop, facilitate miniaturized on-site disposal of medical waste, and adapt to special scenarios such as public health emergencies.

[0073] According to the embodiments of the present disclosure, plasma ignition does not require the use of fuel, thus avoiding pollutants generated by fuel combustion, such as carbon dioxide, sulfur oxides, nitrogen oxides, etc.

[0074] According to an embodiment of the present disclosure, the nozzle 131 is used to guide the generated plasma flame for ignition.

[0075] According to the embodiments of the present disclosure, Figure 1 As shown, the plasma ignition device 1 further includes a heat supply pipe 14 and a blower 15. The heat supply pipe 14 passes through opposite sides of the power supply device 12, and the end of the plasma igniter opposite to the nozzle 131 is installed at one end of the heat supply pipe 14 (for example, Figure 1 The blower 15 is installed at the other end of the heat delivery pipe 14 (for example, Figure 1 The heat delivery pipe 14 is the right end of the heat delivery pipe 14 in the perspective shown in the figure), which is suitable for blowing air into the heat delivery pipe 14. Among them, an air duct 145 is formed between the heat delivery pipe 14 and the plasma igniter 13, so that the heat generated by the plasma igniter is blown into the pyrolysis furnace 3 through the blower 15.

[0076] According to the embodiment of the present disclosure, the heat generated by the plasma igniter is blown into the pyrolysis furnace 3 by the blower 15 to preheat the pyrolysis furnace 3, thereby reducing the heating time of the pyrolysis furnace 3 and reducing energy consumption.

[0077] According to the embodiments of the present disclosure, Figure 1 As shown, the plasma ignition device 1 further includes a protective net 16 installed at the air inlet end of the heat supply pipe 14 to filter the air entering the air supply pipe.

[0078] According to the embodiments of the present disclosure, Figure 1 As shown, one end of the heat delivery pipe 14 connected to the plasma igniter is constructed to be retractable along the length direction of the heat delivery pipe 14 to adjust the depth of the plasma igniter extending into the pyrolysis furnace 3 and accelerate the gas circulation.

[0079] Figure 3 Schematically shows a stereoscopic view of the mounting portion 142 according to an embodiment of the present disclosure, Figure 4 A cross-sectional view of the mounting portion 142 according to an embodiment of the present disclosure is schematically shown.

[0080] According to the embodiments of the present disclosure, Figure 3 and Figure 4 As shown, the heat delivery pipe 14 includes a main body 141 and a mounting portion 142 for mounting the plasma igniter 13. One end of the main body 141 close to the mounting portion 142 can be extended and retracted along the length direction of the heat delivery pipe 14.

[0081] According to the embodiments of the present disclosure, Figure 3 and Figure 4As shown, a plurality of annular support frames 143 (eg, 2 or 3) are installed in the mounting portion 142 for supporting and fixing an end of the plasma igniter 13 away from the nozzle 131 .

[0082] In an illustrative embodiment, Figure 3 and Figure 4 As shown, the support frame 143 includes an inner ring 1431, an outer ring 1432 and a plurality of connectors 1433. The outer ring 1432 is sleeved on the outer periphery of the inner ring 1431 by a plurality of connectors 1433 (for example, 3, 4, 5 or 6) arranged at intervals. The support frame 143 can be installed in the mounting portion 142 by welding, wherein the plasma igniter 13 is installed on the inner ring 1431.

[0083] On the inner ring 1431 of the support frame 143 located at the end of the mounting portion 142 (that is, the air outlet end), a plurality of fixing members 144 (for example, 3, 4, 5 or 6) are formed extending outwardly along the circumferential direction, and fixing holes 1441 are formed on the fixing members 144. External bolts pass through the matching members on the housing of the plasma igniter and the fixing holes 1441 on the fixing members 144, and the plasma igniter 13 is installed on the inner ring 1431 by the cooperation of nuts and bolts.

[0084] It is understandable that the support frame 143 away from the air outlet end of the mounting portion 142 is used to support the plasma igniter 13. The support frame 143 located at the air outlet end of the mounting portion 142 is used to cooperate with the housing of the plasma igniter to fix the plasma igniter 13.

[0085] According to an embodiment of the present disclosure, the portion of the heat transport pipe 14 that is capable of expansion and contraction may be in the form of a bellows, a spiral, a sleeve or a slider.

[0086] According to the embodiments of the present disclosure, Figure 1 As shown, the mobile platform 11 includes a base 111, a plurality of universal wheels 112 and a plurality of lifters 113. The plurality of universal wheels 112 are installed at intervals on the lower surface of the base 111, and are suitable for adjusting the horizontal position of the plasma igniter 13 relative to the pyrolysis furnace 3. The plurality of lifters 113 are installed between the lower surface of the base 111 and the plurality of universal wheels 112, and are suitable for adjusting the height of the plasma igniter 13.

[0087] In an illustrative embodiment, the lifter 113 may be a hydraulic lifter or a screw lifter.

[0088] According to the embodiments of the present disclosure, Figure 2As shown, the plasma igniter 13 includes a first shell, an anode 133, a cathode 132 and an arc-starting device. The first shell has an air inlet pipe 134, and the external working gas is input into the first shell from the air inlet pipe 134. The cathode 132 is arranged in the first shell, and the anode 133 and the cathode 132 are arranged in the first shell with a gap. The arc-starting device is suitable for generating an arc-starting pulse under the action of the power supply device 12 at the initial stage of ignition to break through the working gas between the cathode 132 and the anode 133. Under the action of the arc-starting pulse, the electric field formed by the anode 133 and the cathode 132 ionizes the working gas in the electric field to generate plasma.

[0089] In an illustrative embodiment, the life of the cathode 132 can be >1200 hours, the life of the anode can be >800 hours, the power of the plasma igniter 13 can be 1 Kw, the maximum output power can be 3 Kw, and the operating current can be 3~15A.

[0090] In an illustrative embodiment, the working gas may include one or more of air, nitrogen and argon, and the maximum gas flow rate is 8 L / min.

[0091] According to an embodiment of the present disclosure, the arc striking device uses an arc striking method to strike an arc on a plasma arc circuit by automatic arc striking and / or automatic arc rotating.

[0092] According to an embodiment of the present disclosure, the arc striking device may use a non-contact arc striking method.

[0093] According to an embodiment of the present disclosure, the plasma ignition device 1 can adopt a remote control (such as DCS control) function, and when the operating temperature of the arc ignition device 12 exceeds a preset temperature, the arc ignition device 12 can be extinguished and an alarm can be issued. Figure 1 As shown, the power supply device 12 includes a second housing 121, a main power supply, a rectifier and an arc-starting generating device 122. The main power supply is installed in the second housing 121 for providing direct current. The rectifier is installed in the second housing 121 for inverting direct current into alternating current. The arc-starting head 135 of the arc-starting device extends from the cathode 132 into the space between the anode 133 and the cathode 132, and is used to generate an arc-starting pulse under the action of the alternating current.

[0094] In an illustrative embodiment, the main power supply is connected in a three-phase four-wire mode, and the main power supply adopts a constant current working mode, with an accuracy of >1% and an electrical conversion efficiency of >90%.

[0095] In an illustrative embodiment, the main power supply adopts a full inverter power supply design, high-speed digital signal processing (DSP) chip control, automatic arc ignition, arc ignition voltage>10 kV, and touch screen display and operation.

[0096] In an illustrative embodiment, the main power supply has over-current, short-circuit, phase loss, water shortage protection and anti-spark protection.

[0097] In an illustrative embodiment, the size of the main power supply may be: length×width×height=300 mm×600 mm×600 mm, which is suitable for miniaturized equipment.

[0098] In an illustrative embodiment, the rectifier module can be removed and installed in the second housing 121 through a plug-in structure.

[0099] According to the embodiments of the present disclosure, Figure 2 As shown, the arc starter 135 extends from the cathode 132 into the space between the anode 133 and the cathode 132 to ensure that the arc can be reliably established and maintained between the anode 133 and the cathode 132 .

[0100] According to an embodiment of the present disclosure, the plasma igniter 13 further includes a cooling device, which cools the anode 133, the cathode 132 and the arc starter 135 in an air-cooling manner.

[0101] According to an embodiment of the present disclosure, the magnetic field coil 136 of the arc striking device is wound on the outer surface of the anode 133. After the arc striking head 135 generates an arc striking pulse, the magnetic field coil can rotate and stabilize the plasma arc to form a stable, rotating plasma arc, which is ejected from the nozzle 131 to ignite the medical waste that needs to be ignited, so as to improve work efficiency and reliability.

[0102] Figure 5 A partial half-section side view of a small-scale medical waste rapid pyrolysis system according to an embodiment of the present disclosure is schematically shown.

[0103] As another aspect of the present disclosure, a small-scale medical waste rapid pyrolysis system using plasma ignition is provided. Figure 5 As shown, it includes a temperature maintenance component 2, a pyrolysis furnace 3 and any one of the above-mentioned plasma ignition devices 1. A storage space is formed inside the pyrolysis furnace 3, and the pyrolysis furnace 3 is rotatably arranged on the temperature maintenance component 2. The pyrolysis furnace 3 has an ignition port that can be opened and closed. Among them, the movable platform 11 of the plasma ignition device 1 is adjusted so that the plasma igniter 13 extends into the storage space through the ignition port to spray plasma into the storage space, ignite the medical waste in the storage space, increase the temperature in the storage space to the pyrolysis temperature, and maintain the pyrolysis temperature through the temperature maintenance component 2, so as to provide pyrolysis conditions for the medical waste that subsequently enters the storage space.

[0104] According to the plasma-ignited small medical waste rapid pyrolysis system of the embodiment of the present disclosure, the position of the plasma igniter 13 relative to the pyrolysis furnace 3 of different medical waste rapid pyrolysis systems can be adjusted through the mobile platform 11 that can be adjusted in the height direction and the horizontal direction, so that the nozzle 131 of the plasma igniter 13 extends into the pyrolysis furnace 3, sprays high-temperature plasma into the pyrolysis furnace 3, and ignites the medical waste in the pyrolysis furnace 3, so that the plasma ignition device 1 can be adapted to different small medical waste rapid pyrolysis systems. The startup and heating time of the small medical waste rapid pyrolysis system is shortened, and the disposal efficiency of medical waste is improved. Through the movable plasma ignition device 1, small medical waste rapid pyrolysis systems can be quickly deployed to different locations, so as to adapt to the decentralized medical waste treatment needs and reduce the risks of medical waste during transportation. In addition, the same set of plasma ignition devices 1 can be used at multiple locations, which improves the utilization rate and treatment range of the plasma ignition device 1, and solves the problems of wide dispersion of medical waste, high collection and transportation risks, and weak flexible disposal capabilities in special scenarios such as grassroots and sudden health conditions.

[0105] According to the embodiment of the present disclosure, the temperature in the pyrolysis furnace 3 is ensured to be stable within the pyrolysis temperature range through the temperature maintaining component 2, so as to ensure that the medical waste is completely decomposed and reduce the generation of harmful substances. The impact on the environment is small, which helps to achieve the harmless, reduced and resourceful treatment of medical waste.

[0106] According to an embodiment of the present disclosure, after the plasma ignition device 1 ignites the current pyrolysis furnace 3, the plasma ignition device 1 can be removed from the ignition port and the ignition port can be closed, so that the storage space in the pyrolysis furnace 3 is in an oxygen-deficient or oxygen-free state. In this way, the storage space can always be maintained at the pyrolysis temperature through the temperature maintaining component 2, providing conditions for direct pyrolysis of medical waste that subsequently enters the storage space.

[0107] According to the embodiments of the present disclosure, Figure 5 As shown, the pyrolysis furnace 3 includes an inner shell 31 and an outer shell 32. A containing space is formed inside the inner shell 31, and the inner shell 31 is rotatably arranged on the temperature maintenance component 2. The outer shell 32 is statically sleeved on the periphery of the inner shell 31 relative to the temperature maintenance component 2, and a flue 36 is formed between the outer shell 32 and the inner shell 31. Among them, the temperature maintenance component 2 is suitable for burning fuel to generate high-temperature flue gas, and the flue gas provides heat to the containing space through the flue 36, so that the containing space is maintained at the pyrolysis temperature, and the flue gas is discharged from the outlet located on the outer shell 32 after heat exchange with the inner shell 31.

[0108] According to an embodiment of the present disclosure, a wear-resistant layer is provided on the inner wall of the inner shell 31, and the post-firing compressive strength of the wear-resistant layer is ≥70 MPa.

[0109] According to the embodiments of the present disclosure, Figure 5 As shown, the pyrolysis furnace 3 further includes a heat-insulating layer 33, which is statically sleeved in the outer shell 32 relative to the temperature-maintaining assembly 2. The flue 36 is located between the heat-insulating layer 33 and the inner shell 31.

[0110] According to the embodiment of the present disclosure, by providing a heat-insulating layer 33 on the outer shell 32, at least a portion of the heat of the high-temperature flue gas in the flue 36 can be reflected to the inner shell 31, thereby reducing heat loss and improving energy utilization efficiency.

[0111] According to an embodiment of the present disclosure, the thermal conductivity of the thermal insulation layer 33 is ≤0.6 W / m·k.

[0112] According to the embodiments of the present disclosure, Figure 5 As shown, the two ends of the pyrolysis furnace 3 are respectively provided with a first end cover 34 and a second end cover 35 which are stationary relative to the temperature maintenance component 2, and the pyrolysis furnace 3 is rotatably installed between the first end cover 34 and the second end cover 35. The first end cover 34 is provided with a feed port 341, which is suitable for transferring medical waste from the outside into the pyrolysis furnace 3, and the second end cover 35 is provided with a discharge port 351. Among them, the ignition port is provided on the first end cover 34, the pyrolysis furnace 3 is obliquely installed on the temperature maintenance component 2, and one end provided with the feed port 341 is higher than the end provided with the discharge port 351, so that the pyrolysis products and pyrolysis gas of the medical waste after pyrolysis are gradually moved to the discharge port 351 during the rotation of the pyrolysis furnace 3, and discharged from the discharge port 351.

[0113] In an illustrative embodiment, the angle between the axis of the pyrolysis furnace 3 and the horizontal plane may range from 5° to 20°, for example, any one of 5°, 10°, 12°, 15°, 20°, etc.

[0114] According to an embodiment of the present disclosure, a material shifting plate arranged along the circumferential direction may be further provided in the inner shell 31 to shift the medical waste toward the discharge port 351 during the rotation of the inner shell 31 .

[0115] In an illustrative embodiment, the discharge port 351 may be disposed at the lower portion of the second end cover 35 to facilitate the discharge of the pyrolysis products.

[0116] According to the embodiments of the present disclosure, Figure 5 As shown, a discharge pipe is provided on the discharge port 351, and the discharge pipe extends upward in the height direction to form an exhaust port for discharging pyrolysis gas. The discharge pipe extends downward in the height direction to form a slag outlet for discharging solid pyrolysis products.

[0117] In an illustrative embodiment, Figure 5As shown, the temperature maintaining unit includes a combustion chamber and a pyrolysis gas. The combustion chamber is arranged below the pyrolysis furnace 3 and communicated with the flue 36. The burner 21 is adapted to burn the fuel in the combustion chamber to generate flue gas.

[0118] In an exemplary embodiment, the combustion chamber may be constructed of refractory bricks.

[0119] In an illustrative embodiment, Figure 5 As shown, one end of the inner shell 31 extends axially from the outer shell 32 and the insulation layer 33 to form an extension. A rack is circumferentially arranged on the outer wall of the extension. The small medical waste rapid pyrolysis system also includes a drive motor 37, a transmission gear and a transmission belt 38. The drive motor 37 is mounted on the base, and the transmission gear is mounted on the base, and is suitable for rotating under the drive of the drive motor 37. The transmission belt 38 is sleeved between the extension and the transmission gear, and meshes with the rack and the transmission gear to drive the inner shell 31 to rotate under the drive of the rotating motor.

[0120] According to the plasma-ignited small-scale medical waste rapid pyrolysis system provided by the embodiment of the present disclosure, the medical waste in the pyrolysis furnace 3 is ignited by the plasma ignition device 1, with high reliability, hot start time ≤10min, and temperature increase time to 850°C ≤1h, meeting the requirements for miniaturized in-situ rapid start-stop and safe disposal of medical waste.

[0121] In an illustrative embodiment, when using the plasma ignition small medical waste rapid pyrolysis system provided in the embodiment of the present disclosure, the mobile platform 11 can be used to move the plasma igniter 13 to a suitable position, and the height of the plasma igniter 13 can be adjusted using multiple lifts 113 so that the plasma igniter 13 reaches a suitable height.

[0122] Then, the power supply can be connected and the heat supply device can be started. Specifically, the heat supply pipe 14 can be placed at a designated position, the blower 15 can be started, the air can be collected by the blower 15, and then the air and the heat generated by the plasma igniter 13 can be sent to the inside of the pyrolysis furnace 3 through the heat supply pipe 14, and the temperature maintenance component 2 can be started at the same time to preheat the medical waste in the pyrolysis furnace 3.

[0123] In an exemplary embodiment, the density and thermal conductivity of medical waste are 0.25 kg / m 3and 1.9kJ / (kg.K), and the medical waste treatment capacity is 200kg / d. The medical waste to be treated enters from the medical waste feed port 341. After the main power supply is turned on, the input voltage is 380 V±10%, 50 HZ, and it is connected through a three-phase four-wire method. The AC current is converted into DC power through the main power supply. The working voltage is 30~80 V, no-load>250 V, and the working current is 2~15 A. The rectifier converts the DC power into AC power. Under the electric field provided by the cathode 132 and the anode 133 of the plasma ignition device 1, the arc device 12 triggers the anode 133 and the cathode 132 through AC power to generate a plasma flame to ignite the medical waste. The hot start time of the plasma ignition small medical waste rapid pyrolysis system is ≤10min, and the temperature rise time to 850℃ is ≤1h, which can meet the requirements of small-scale in-situ rapid start-stop and safe disposal of medical waste.

[0124] The embodiments of the present disclosure are described above. However, these embodiments are only for illustrative purposes and are not intended to limit the scope of the present disclosure. Although the embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage. The scope of the present disclosure is defined by the attached claims and their equivalents. Without departing from the scope of the present disclosure, those skilled in the art may make a variety of substitutions and modifications, which should all fall within the scope of the present disclosure.

Claims

1. A plasma ignition device, characterized in that: include: Mobile platforms; A power supply device, mounted on the mobile platform; as well as A plasma igniter, mounted on the mobile platform, the plasma igniter being adapted to spray plasma under the action of the power supply device; Among them, the mobile platform is suitable for adjusting the position of the plasma igniter relative to the pyrolysis furnace of different medical waste rapid pyrolysis systems in the height direction and the horizontal direction, so that the nozzle of the plasma igniter extends into the pyrolysis furnace to spray the plasma into the pyrolysis furnace and ignite the medical waste located in the pyrolysis furnace.

2. The plasma ignition device according to claim 1, characterized in that: Also includes: A heat delivery pipe passes through two opposite sides of the power supply device, and an end of the plasma igniter opposite to the nozzle is installed at one end of the heat delivery pipe; as well as A blower, installed at the other end of the heat delivery pipe, suitable for blowing air into the heat delivery pipe; Wherein, an air duct is formed between the heat supply pipe and the plasma igniter, so that the heat generated by the plasma igniter is blown into the pyrolysis furnace through the blower.

3. The plasma ignition device according to claim 2, characterized in that: One end of the heat delivery pipe connected to the plasma igniter is configured to be retractable along the length direction of the heat delivery pipe to adjust the depth of the plasma igniter extending into the pyrolysis furnace.

4. The plasma ignition device according to claim 2, characterized in that: The mobile platform comprises: Base; a plurality of universal wheels, installed at intervals on the lower surface of the base, suitable for adjusting the horizontal position of the plasma igniter relative to the pyrolysis furnace; A plurality of lifters are installed between the lower surface of the base and the plurality of universal wheels, and are suitable for adjusting the height of the plasma igniter.

5. The plasma ignition device according to claim 1, characterized in that: The plasma igniter comprises: A first shell having an air inlet pipe, through which external working gas is input into the first shell; a cathode disposed in the first shell; and an anode, disposed in the first shell; The arc striking device is suitable for generating an arc striking pulse under the action of the power supply device at the initial stage of ignition to break through the working gas between the cathode and the anode. Under the action of the arc striking pulse, the electric field formed by the anode and the cathode ionizes the working gas in the electric field to generate plasma.

6. The plasma ignition device according to claim 5, characterized in that: The power supply device comprises: a second shell; a main power supply, installed in the second housing, for providing direct current; and A rectifier device is installed in the second shell and is used to invert the direct current into alternating current. The arc striking head of the arc striking device passes through the cathode and extends into the space between the anode and the cathode, so as to generate the arc striking pulse under the action of the alternating current.

7. A small-scale medical waste rapid pyrolysis system with plasma ignition, characterized in that: include: Temperature maintenance components; A pyrolysis furnace, wherein a receiving space is formed inside, the pyrolysis furnace is rotatably arranged on the temperature maintaining assembly, and the pyrolysis furnace has an ignition port that can be opened and closed; as well as The plasma ignition device according to any one of claims 1 to 6; Among them, the moving platform of the plasma ignition device is adjusted so that the plasma igniter extends into the containing space through the ignition port to spray plasma into the containing space, ignite the medical waste in the containing space, increase the temperature in the containing space to the pyrolysis temperature, and maintain the pyrolysis temperature through the temperature maintaining component to provide pyrolysis conditions for the medical waste that subsequently enters the containing space.

8. The small-scale medical waste rapid pyrolysis system according to claim 7, characterized in that: The pyrolysis furnace comprises: An inner shell, the accommodating space is formed inside, and the inner shell is rotatably arranged on the temperature maintaining assembly; An outer shell is statically sleeved on the periphery of the inner shell relative to the temperature maintaining assembly and forms a flue between the outer shell and the inner shell; The temperature maintaining component is adapted to burn fuel to generate flue gas, and allow the flue gas to provide heat to the accommodation space via the flue, so that the accommodation space is maintained at the pyrolysis temperature; Wherein, after the flue gas exchanges heat with the inner shell, it is discharged from the air outlet located on the outer shell.

9. The small-scale medical waste rapid pyrolysis system according to claim 8, characterized in that: The pyrolysis furnace also includes: A heat-insulating layer is statically sleeved in the outer shell relative to the temperature-maintaining component; Wherein, the flue is located between the thermal insulation layer and the inner shell.

10. The small-scale medical waste rapid pyrolysis system according to claim 7, characterized in that: The two ends of the pyrolysis furnace are respectively provided with a first end cover and a second end cover which are stationary relative to the temperature maintaining assembly, and the pyrolysis furnace is rotatably installed between the first end cover and the second end cover; The first end cover is provided with a feed port, and the feed port is suitable for transferring medical waste from the outside into the pyrolysis furnace, and the second end cover is provided with a discharge port; Among them, the ignition port is arranged on the first end cover, the pyrolysis furnace is installed on the temperature maintaining assembly at an angle, and the end with the feed port is higher than the end with the discharge port, so that the pyrolysis products and pyrolysis gas of the medical waste after pyrolysis are gradually moved to the discharge port during the rotation of the pyrolysis furnace and discharged from the discharge port.

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