Waste incineration system

Abstract

The present application provides a waste incineration system, comprising a first pyrolysis device and a gas shunt. The waste incineration system of the present application creates an oxygen-free negative pressure environment for waste pyrolysis through the first pyrolysis device. The first burner only serves as an ignition function and does not assist combustion to reduce tail gas emissions. After the first pyrolysis device is ignited, the high-temperature heat generated after pyrolysis is efficiently utilized through the downstream gas shunt to introduce hot gas into the first pyrolysis device again, creating an oxygen-free negative pressure environment, allowing household waste to burn fully under high-temperature oxygen-free negative pressure conditions, and reducing tail gas emissions.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of garbage disposal, in particular to a garbage incineration system. BACKGROUND

[0002] The background provided in this section is merely for the purpose of enhancing the understanding of the present disclosure and does not necessarily describe prior art.

[0003] The existing garbage incineration system is not sufficient for burning garbage. The incineration system needs to be carried out in an oxygen environment, and sufficient oxygen needs to be continuously supplied to the combustion furnace, so that the smoke and waste gas components are complex. In addition, fuel (diesel or gasoline, etc.) is needed for auxiliary combustion, which will produce more exhaust gas and smoke particles that cannot be completely eliminated. The exhaust emission treatment is not thorough enough, and the exhaust emission is not clean enough. SUMMARY

[0004] The purpose of the present application is to at least solve the problem of insufficient garbage burning and high pollution emission of the existing garbage incineration system. The purpose is achieved by the following technical scheme:

[0005] The present application provides a garbage incineration system, comprising:

[0006] A first pyrolysis device, comprising a first pyrolysis cavity, a first inlet, a first outlet, a backflow gas inlet and a first burner, the first inlet, the first outlet and the backflow gas inlet are in communication with the first pyrolysis cavity, the first inlet is used for receiving garbage, and the first burner is used for igniting garbage in the first pyrolysis cavity;

[0007] A gas diverter having a diverging inlet, a first diverging outlet and a second diverging outlet, the diverging inlet is in communication with the first diverging outlet and the second diverging outlet respectively, the diverging inlet is also in communication with the first outlet, the first diverging outlet is in communication with the backflow gas inlet, and the second diverging outlet is used for connecting an exhaust gas treatment system.

[0008] The garbage incineration system provided by the present application creates an oxygen-free negative pressure environment for garbage pyrolysis through the first pyrolysis device, and the first burner only serves as an ignition function and does not assist combustion to reduce exhaust emission. After the first pyrolysis device is ignited, the high-temperature heat generated after pyrolysis is efficiently utilized by the downstream gas diverter to introduce hot gas into the first pyrolysis device again, creating an oxygen-free negative pressure environment, allowing household garbage to burn fully under high-temperature oxygen-free negative pressure conditions, and reducing exhaust emission.

[0009] In addition, the garbage incineration system according to the present application can also have the following additional technical features:

[0010] In some embodiments of the present application, the waste incineration system further comprises a waste pretreatment subsystem, the waste pretreatment subsystem comprising a waste treatment device, a conveying device for conveying waste treated by the waste treatment device to the first inlet, and a preheating device installed on the conveying device, the preheating device being provided with a preheating cavity, a preheating inlet and a preheating outlet, the preheating inlet and the preheating outlet both communicating with the preheating cavity, the preheating inlet communicating with the first shunt outlet, and the preheating outlet communicating with the backflow gas inlet.

[0011] In some embodiments of the present application, the waste incineration system further comprises a second pyrolysis device arranged between the first pyrolysis device and the gas shunt, the second pyrolysis device comprising a second pyrolysis cavity, a second inlet, a second outlet and a second burner, the second inlet and the second outlet both communicating with the second pyrolysis cavity, the second inlet further communicating with the first outlet of the first pyrolysis cavity, the second outlet communicating with the shunt inlet, and the second burner being used for igniting waste in the second pyrolysis cavity.

[0012] In some embodiments of the present application, the first pyrolysis device further comprises an air supply assembly arranged inside the first pyrolysis cavity, the air supply assembly comprising an air cavity, an air inlet and an air outlet, the air inlet and the air outlet both communicating with the air cavity, and the air inlet communicating with the backflow gas inlet.

[0013] In some embodiments of the present application, the first pyrolysis device further comprises a support, the air supply assembly being connected to the cavity wall of the first pyrolysis cavity through the support, the first pyrolysis cavity being in the form of a rotating body, the air supply assembly being in the form of a straight pipe, the air supply assembly being arranged coaxially with the first pyrolysis cavity, and a plurality of air outlets being arranged along the circumferential direction and the axial direction of the air supply pipe.

[0014] In some embodiments of the present application, the waste incineration system further comprises a blowing subsystem, the blowing subsystem comprising a heat exchanger and a blower, part of the heat exchanger being arranged inside the second pyrolysis cavity, the inlet of the heat exchanger communicating with the outlet of the blower, the first pyrolysis device further comprising a first blowing port arranged on the radial side wall of the first pyrolysis cavity and communicating with the first pyrolysis cavity, and the outlet of the heat exchanger communicating with the first blowing port.

[0015] In some embodiments of the present application, the first inlet is arranged on the radial side wall of the first pyrolysis cavity, the first blowing port is arranged below the first inlet along the height direction of the first pyrolysis cavity, and the first blowing port is arranged close to the first inlet.

[0016] In some embodiments of the present application, the first pyrolysis device further comprises a second blowing port, the second blowing port is arranged on the radial cavity wall of the first pyrolysis cavity, and the second blowing port is arranged close to the bottom end of the first pyrolysis cavity, the second blowing port is in communication with the first pyrolysis cavity, and the second blowing port is also in communication with the outlet of the heat exchanger.

[0017] In some embodiments of the present application, the waste incineration system further comprises a dust removal subsystem, the dust removal subsystem comprises a water pool, a purification device and a conveying device, at least one of the second pyrolysis device and the gas diverter is provided with a bottom dust outlet pipe, the bottom dust outlet pipe extends into the water pool, the water pool is used to hold a water seal liquid which is higher than the bottom end of the bottom dust outlet pipe, the purification device is used to purify the water seal liquid, and the conveying device is used to convey the water seal liquid to the purification device.

[0018] In some embodiments of the present application, the waste incineration system further comprises a particle collection device, the first pyrolysis device further comprises a first ash discharge hole and a rotary grate, the first ash discharge hole is arranged at the bottom of the first pyrolysis cavity, the first ash discharge hole is in communication with the particle collection device, the rotary grate comprises a rotary disc and a driving device, the rotary disc is provided with a second ash discharge hole, the rotary disc is rotatably arranged at the bottom of the first pyrolysis cavity, and the driving device is used to drive the rotary disc to rotate so that the second ash discharge hole is intermittently in communication with the first ash discharge hole. BRIEF DESCRIPTION OF DRAWINGS

[0019] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The detailed description is made with reference to the accompanying drawings.

[0020] Figure 1 A structure schematic diagram of a waste incineration system according to an embodiment of the present application is schematically shown;

[0021] Figure 2 A partial structure schematic diagram of an incineration part of a waste incineration system according to an embodiment of the present application is schematically shown;

[0022] Figure 3 A partial structure schematic diagram of Figure 1 at A of FIG. 8 is schematically shown;

[0023] Figure 4 A partial structure schematic diagram of another embodiment of a rotary grate according to an embodiment of the present application is schematically shown;

[0024] Figure 5 A structure diagram of a water path part (water pumping water path) of the garbage incineration system according to the embodiment of the present application is schematically shown;

[0025] Figure 6 A structure diagram of a water path part (water pumping water path) of the garbage incineration system according to the embodiment of the present application is schematically shown;

[0026] Figure 7 A structure diagram of the air blowing sub-system according to the embodiment of the present application is schematically shown;

[0027] The reference signs are as follows:

[0028] 1000, garbage incineration system;

[0029] 100, first pyrolysis device; 11, first pyrolysis cavity; 12, first inlet; 13, first outlet; 14, backflow air inlet; 15, first burner; 16, air feeding assembly; 161, air cavity; 162, air inlet; 163, air outlet; 164, support; 171, first ash discharging hole; 172, second ash discharging hole; 173, rotating disc; 174, driving device; 175, rotating shaft; 176, transmission shaft; 177a, first bevel gear; 177b, second bevel gear; 178, support disc; 179, baffle;

[0030] 200, second pyrolysis device; 21, second pyrolysis cavity; 22, second inlet; 23, second outlet; 24, second burner;

[0031] 300, gas diverter; 31, diverging inlet; 32, first diverging outlet; 33, second diverging outlet; 301, hot air filter;

[0032] 40, heat exchanger; 41, air blower; 42, first air blowing port; 43, second air blowing port;

[0033] 50, garbage treatment device; 51, conveying device; 52, preheating device; 53, preheating inlet; 54, preheating outlet; 55, backflow air feeder;

[0034] 600, water pool; 601, purifying device; 602, first water pump; 603, bottom dust discharging pipe; 604, second water pump. DETAILED DESCRIPTION

[0035] Example embodiments of the present disclosure will be described more fully hereinafter with reference to the accompanying drawings. While example embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art.

[0036] It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises", "comprising", "includes", "including" and "has" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or groups thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order in which they are described, unless specifically identified as an order dependent step. It is also to be understood that additional or alternative steps can be employed.

[0037] Although the terms first, second, third, and the like can be used herein to describe various elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can be only used to distinguish one element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second", and the like are used herein to describe a variety of elements, components, regions, layers and / or sections, and do not imply an order or sequence unless clearly indicated by the context. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of example embodiments.

[0038] Spatially relative terms, such as "inner", "outer", "inward", "outward", "lower", "bottom", "top", "upper", and the like, can be used herein for ease of description to describe one element or feature's relationship to another element(s) or feature(s) as illustrated in the figures. Spatially relative terms can be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below" can encompass both an orientation of above and below. The devices can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0039] As Figures 1 to 7As shown, the present application proposes a waste incineration system 1000, comprising:

[0040] A first pyrolysis device 100, comprising a first pyrolysis cavity 11, a first inlet 12, a first outlet 13, a backflow gas inlet 14 and a first burner 15, the first inlet 12, the first outlet 13 and the backflow gas inlet 14 are all communicated with the first pyrolysis cavity 11, the first inlet 12 is used for receiving waste, and the first burner 15 is used for igniting waste in the first pyrolysis cavity 11;

[0041] A gas diverter 300, having a diverging inlet 31, a first diverging outlet 32 and a second diverging outlet 33, the diverging inlet 31 is communicated with the first diverging outlet 32 and the second diverging outlet 33 respectively, the diverging inlet 31 is further communicated with the first inlet 12 through a pipeline, the first diverging outlet 32 is communicated with the backflow gas inlet 14 through a pipeline, and the second diverging outlet 33 is used for communicating with a tail gas treatment system.

[0042] It can be understood that the waste can be collected, treated and preheated and then delivered to the first inlet 12 through a waste pretreatment subsystem, the waste pretreatment subsystem can be connected with a shredder, the shredder can further shred the waste into smaller particles, and the shredded waste can be delivered to the first pyrolysis device 100 through a conveyor arranged behind the shredder.

[0043] The first pyrolysis device 100 is used for pyrolyzing waste at high temperature, and the waste pyrolysis is a thermal decomposition process of waste under anoxic or anaerobic conditions. The pyrolysis of organic waste can obtain gas or liquid fuel which can be separated, recovered and reused. In addition, since the pyrolysis temperature is relatively low, the nitrogen oxides generated in the pyrolysis process are less, and the tail gas emission is minimal, which is beneficial to environmental protection. The first pyrolysis device 100 has the first pyrolysis cavity 11 for receiving waste and pyrolyzing waste, the first pyrolysis cavity 11 can be defined by a first pyrolysis shell of the first pyrolysis device 100, the first pyrolysis shell is provided with the first inlet 12 and the first outlet 13 communicated with the first pyrolysis cavity 11, the first inlet 12 is connected with the outlet of the conveyor to receive the shredded waste, the first burner 15 is arranged in the first pyrolysis cavity 11, the first burner 15 can be an oil burner, which ignites the waste in the first pyrolysis cavity 11 by burning oil to pyrolyze, and the first burner 15 can also be a plasma burner, which ignites the waste in the first pyrolysis cavity 11 by high temperature generated when the plasma burner generates plasma.

[0044] The gas flow divider 300 can be a structure of a cyclone separator, or other gas flow divider structure. The gas flow divider 300 is configured to recycle part of the tail gas generated by the first pyrolysis device 100 into the first pyrolysis chamber 11, so as to generate an oxygen-free negative pressure environment in the first pyrolysis chamber 11, and to completely and fully burn the garbage under high-temperature oxygen-free negative pressure, thereby reducing the amount of tail gas emissions. The gas flow divider 300 has a flow inlet, a first flow outlet 32 and a second flow outlet 33. The flow inlet is in communication with the first outlet 13 through a pipeline, so as to receive the tail gas generated by the first pyrolysis device 100. The first flow outlet 32 is in communication with the recycling gas inlet 14 on the first pyrolysis device 100 through a pipeline, so as to recycle part of the tail gas into the first pyrolysis chamber 11, continue to heat the garbage, fully burn the garbage, improve the pyrolysis efficiency, and reduce emissions.

[0045] Downstream of the gas flow divider 300, a tail gas treatment system can be connected to purify and cool the tail gas, so as to reduce emissions. Specifically, the tail gas treatment system can have a cyclone dust collector and a spray dust removal tower to further purify and cool the tail gas generated by the garbage incineration system. The cyclone dust collector can precipitate particulate matter in the tail gas to facilitate collection of the particulate matter and reduce emissions. The spray dust removal tower can further collect particulate matter in the tail gas to reduce emissions. The cyclone dust collector and the spray dust removal tower can refer to the existing structures of the cyclone dust collector and the spray dust removal tower.

[0046] The gas driving force of the garbage incineration system 1000 can be realized by an induced draft fan arranged downstream of the gas flow divider 300. The induced draft fan extracts the gas in the first pyrolysis device 100, provides the driving force for extracting the gas, drives the tail gas generated by the first pyrolysis device 100 to flow to the tail gas treatment system for cooling and purification, and generates a negative pressure in the first pyrolysis device 100 to create an oxygen-free or low-oxygen environment in the first pyrolysis chamber 11, thereby reducing the production of nitrogen oxides during garbage pyrolysis and further reducing emissions. The structure of the induced draft fan can refer to the existing structure of the induced draft fan.

[0047] The garbage incineration system 1000 according to the present application recycles the tail gas generated by the pyrolysis of garbage into the first pyrolysis device 100 through a circulation pipeline after ignition, generates an oxygen-free negative pressure environment, and completely and fully burns the garbage under high-temperature oxygen-free negative pressure, thereby reducing the amount of tail gas emissions.

[0048] As Figure 1As shown, in some embodiments of the present application, the garbage pretreatment subsystem comprises a garbage treatment device 50, a conveying device 51 for conveying the garbage treated by the garbage treatment device 50 to the first inlet 12, and a preheating device 52 installed on the conveying device 51, the preheating device 52 being provided with a preheating inlet 53 and a preheating outlet 54, both of which are in communication with a preheating cavity, the preheating inlet 53 being in communication with the first shunt outlet 32, and the preheating outlet 54 being in communication with the backflow gas inlet 14.

[0049] It can be understood that the garbage processing device 50 can refer to an existing garbage shredder, which is used to further shred the garbage to facilitate combustion and improve the efficiency of garbage pyrolysis. The conveying device 51 can be a belt conveyor or a screw conveyor, and the screw conveyor can be selected to convey the shredded garbage into the first pyrolysis device 100. The preheating device 52 is installed close to the conveying device 51 to facilitate heating of the garbage. The preheating cavity can be arranged along the conveying direction of the conveying device 51. The preheating cavity can be defined by the outer shell of the preheating device 52, and the preheating cavity has a preheating inlet and a preheating outlet 54. The preheating inlet is communicated with the first shunt outlet 32 of the gas shunt 300 through a pipeline to return the high-temperature tail gas pyrolyzed by the second pyrolysis device 200 to the preheating cavity, preheat the garbage, and make the garbage reach a certain temperature in advance, thereby shortening the time for the garbage to reach the combustion temperature in the first pyrolysis device 100, improving the efficiency of pyrolysis. The preheating outlet 54 is communicated with the backflow inlet 14 on the first pyrolysis device 100, so that the hot gas enters the first pyrolysis cavity 11 after preheating the garbage to continue to pyrolyze the garbage, improve the pyrolysis temperature, and thereby improve the pyrolysis efficiency. Specifically, the garbage pretreatment subsystem can include a hopper, a garbage processing device 50 and a conveying device 51 connected in sequence. The hopper is arranged above the garbage processing device 50, and the garbage in the hopper can fall into the garbage processing device 50 for shredding treatment. The screw conveyor can convey the shredded garbage to the first inlet 12, and then make the garbage enter the first pyrolysis cavity 11 for pyrolysis. The preheating device 52 can include a preheating cavity in a cylindrical structure, which is sleeved on the screw conveyor so that the garbage can be heated by the preheating cavity when moving along the screw conveyor, thereby improving the temperature of the garbage before pyrolysis and improving the pyrolysis efficiency. More specifically, the first inlet 12 can be arranged on the side wall of the first pyrolysis cavity 11, and the first inlet 12 is arranged close to the top end of the first pyrolysis cavity 11. The outlet of the screw conveyor is inclinedly connected with the first inlet 12, so that the garbage can be obliquely dropped into the first pyrolysis cavity 11. The above garbage conveying structure makes the conveying process of the garbage more smooth. Specifically, a backflow induced draft fan 55 can be arranged on the pipeline communicating the preheating cavity with the gas shunt 300 to drive the high-temperature gas to flow from the gas shunt 300 to the preheating cavity, improve the flow speed of the gas, reduce the residence time of the gas in the pipeline, and thereby improve the temperature of the preheating cavity. To improve the purity of the backflow high-temperature gas, a hot air filter 301 can be arranged before the backflow induced draft fan 55 and the gas shunt 300 to filter the high-temperature gas from the gas shunt 300, thereby reducing the failure rate of the backflow induced draft fan 55.

[0050] As Figure 1 and 2As shown, in some embodiments of the present invention, the waste incineration system 1000 further includes a second pyrolysis device 200, which includes a second pyrolysis chamber 21, a second inlet 22, a second outlet 23, and a second burner 24. The second inlet 22 and the second outlet 23 are both connected to the second pyrolysis chamber 21. The second inlet 22 is also connected to the first pyrolysis chamber 11 through a pipeline. The second burner 24 is used to ignite the waste in the second pyrolysis chamber 21.

[0051] Understandably, the function of the second pyrolysis device 200 is to further pyrolyze the exhaust gas generated after the pyrolysis of the first pyrolysis device 100 at high temperature. The second pyrolysis device 200 has a second pyrolysis chamber 21 for receiving the exhaust gas and for further pyrolysis of the exhaust gas. The second pyrolysis chamber 21 can be defined by the second pyrolysis shell of the second pyrolysis device 200. The second pyrolysis shell has a second inlet 22 and a second outlet 23 that communicate with the second pyrolysis chamber 21. The second inlet 22 and the first outlet 13 are connected by a pipeline to receive the exhaust gas generated after the pyrolysis of the first pyrolysis device 100. A second burner 24 is provided in the second pyrolysis chamber 21. The second burner 24 can be a fuel oil burner, which ignites the exhaust gas and residual waste in the exhaust gas in the second pyrolysis chamber 21 by igniting fuel oil for secondary pyrolysis. The second burner 24 can also be a plasma burner, which ignites the waste in the second pyrolysis chamber 21 by generating plasma at high temperature.

[0052] More specifically, a desulfurization and denitrification device can be installed on the pipeline connecting the second pyrolysis device 200 and the first pyrolysis device 100 to desulfurize the tail gas generated after the first pyrolysis device 100 pyrolysis, thereby reducing the sulfur dioxide gas in the emitted tail gas. The desulfurization and denitrification device can refer to existing desulfurization and denitrification devices.

[0053] like Figure 1 , Figure 2 As shown, in some embodiments of the present invention, the first pyrolysis apparatus 100 further includes an air supply assembly 16, which is disposed inside the first pyrolysis chamber 11. The air supply assembly 16 includes an air chamber 161, an air inlet 162, and an air outlet 163. The air inlet 162 and the air outlet 163 are both connected to the air chamber 161, and the air inlet 162 is connected to the return air inlet 14.

[0054] It can be understood that the air supply assembly 16 can be arranged in the first pyrolysis cavity 11 to transport the hot gas returned by the gas flow divider 300 into the first pyrolysis cavity 11, to blow away the garbage, to improve the effect of combustion, and to efficiently utilize the circulating preheating to improve the pyrolysis efficiency. The first pyrolysis cavity 11 has a rotary body structure, for example, a cylindrical cavity, and the air supply assembly 16 can have a straight pipe type air supply pipe structure. The air supply assembly 16 is fixed on the cavity wall of the first pyrolysis cavity 11 by a support 164 and is coaxially arranged with the first pyrolysis cavity 11. The air supply assembly 16 is arranged in the center of the first pyrolysis cavity 11. The air supply pipe is provided with a plurality of air outlets 163. The air outlets 163 can be arranged in the axial direction of the air supply pipe at intervals. The air outlets 163 can also be arranged in multiple rows in the circumferential direction of the air supply pipe. Adjacent two rows of air outlets 163 are arranged staggered, so that the air supply assembly 16 can generate a cyclone in the first pyrolysis cavity 11, to disturb and turn over the garbage in the first pyrolysis cavity 11, to further blow away the garbage, to improve the efficiency of combustion, to make the garbage burn more fully, and to further reduce pollution emissions. Specifically, the air supply pipe can extend along the central axis of the first pyrolysis cavity 11 and be fixed to the wall of the first pyrolysis cavity 11 by supports on both radial sides. The return air inlet 14 can be communicated with the air inlet 162 through an air supply connecting pipe. The air supply connecting pipe can be arranged at the middle position of the first pyrolysis cavity 11 in the height direction of the first pyrolysis cavity 11 and extend in the radial direction of the first pyrolysis cavity 11. The air supply connecting pipe can play a supporting role for the air supply pipe.

[0055] As shown in Figure 7 In some embodiments of the present application, the garbage incineration system 1000 further includes a blowing sub-system. The blowing sub-system includes a heat exchanger 40 and a blower 41. Part of the heat exchanger 40 is arranged inside the second pyrolysis cavity 21. The inlet of the heat exchanger 40 is communicated with the outlet of the blower 41. The first pyrolysis device 100 further includes a first blowing port 42. The first blowing port 42 is arranged on the radial side wall of the first pyrolysis cavity 11 and is communicated with the first pyrolysis cavity 11. The outlet of the heat exchanger 40 is communicated with the first blowing port 42.

[0056] It can be understood that the heat exchanger 40 can be arranged in the second pyrolysis device 200, and specifically, the heat exchanger 40 can adopt a coil type heat exchanger 40, and the coil structure of the heat exchanger 40 can be arranged along the axial direction of the second pyrolysis cavity 21 to provide a larger heat exchange surface area, to exchange heat with the high-temperature gas in the second pyrolysis cavity 21, to improve the heat exchange efficiency, the inlet of the heat exchanger 40 extends out of the second pyrolysis device 200 and communicates with the air blower 41, and the air blower 41 can adopt an existing air blower 41, and the air blower 41 can send the gas into the heat exchanger 40, and then the high temperature generated by the pyrolysis of the waste in the second pyrolysis cavity 21 heats the gas in the heat exchanger 40, and the outlet of the heat exchanger 40 communicates with the first blowing port 42 on the first pyrolysis device 100, and specifically, the heat exchanger 40 can be connected to the first pyrolysis cavity 11 from the first blowing port 42 on the first pyrolysis shell,

[0057] As shown in Figure 7 , in some embodiments of the present application, the first inlet 12 is arranged on the radial side wall of the first pyrolysis cavity 11, and the first blowing port 42 is arranged below the first inlet 12 along the height direction of the first pyrolysis cavity 11, and the first blowing port 42 is arranged close to the first inlet 12.

[0058] It can be understood that the first blowing port 42 can be arranged below the first inlet 12, the first inlet 12 can be arranged obliquely downward, and the blowing direction of the first blowing port 42 can intersect the waste outflow direction of the first inlet 12, so that the hot gas blown out of the first blowing port 42 can blow the waste flowing out of the first inlet 12 toward the center of the first pyrolysis cavity 11, and the waste can be blown away to a certain extent, so that the waste is more reasonably distributed in the first pyrolysis cavity 11, the probability of the waste being stacked in a fixed position in the first pyrolysis cavity 11 is reduced, and the pyrolysis efficiency is improved.

[0059] As shown in Figure 7 , in some embodiments of the present application, the first pyrolysis device 100 further comprises a second blowing port 43, the second blowing port 43 is arranged on the radial cavity wall of the first pyrolysis cavity 11, and the second blowing port 43 is arranged close to the bottom end of the first pyrolysis cavity 11, the second blowing port 43 communicates with the first pyrolysis cavity 11, and the second blowing port 43 further communicates with the outlet of the heat exchanger 40.

[0060] It can be understood that the second blowing port 43 can be arranged at the bottom end of the first pyrolysis cavity 11, that is, arranged at the bottom end of the side wall of the first pyrolysis cavity 11, and the waste at the bottom end of the first pyrolysis cavity 11 can be stirred by hot gas to improve the pyrolysis efficiency, and more specifically, a blowing pipe can be arranged at the second blowing port 43 to further guide the hot gas, so that the hot gas blows upward to the rotary grate and blows away the waste. The rotary grate is arranged at the bottom of the first pyrolysis cavity 11, and the waste can be discharged outside the cavity through the rotary grate after being blown away.

[0061] In addition, the heat exchanger 40 can also be connected to the air supply assembly 16, and can also be connected to the air supply assembly 16. By setting up a blowing subsystem, the high-temperature heated air in the second pyrolysis chamber 21 is transported to the air supply assembly 16. The air supply assembly 16 can transport the high-temperature gas to the first pyrolysis chamber 11, further improving the degree of waste pyrolysis in the first pyrolysis chamber 11, improving the efficiency of pyrolysis, and reducing pollution emissions.

[0062] like Figures 1-7 As shown, in some embodiments of the present invention, the waste incineration system 1000 further includes a dust removal subsystem, which includes a water tank 600, a purification device 601, and a conveying device. At least one of the second pyrolysis device 200 and the gas distributor 300 is provided with a bottom dust outlet pipe 603, which extends into the water tank 600. The water tank 600 is used to hold water seal liquid that covers the bottom end of the bottom dust outlet pipe 603. The purification device 601 is used to purify the water seal liquid, and the conveying device is used to convey the water seal liquid to the purification device 601.

[0063] Understandably, to reduce dust or pyrolysis waste generated by the various subsystems in the waste incineration system 1000, a bottom dust outlet pipe 603 can be installed at the bottom of the second pyrolysis device 200 and the gas distributor 300. The bottom dust outlet pipe 603 extends vertically, with its top end connected to the interior of the second pyrolysis device 200 and the gas distributor 300, and its bottom end inserted into the water tank 600. The water tank 600 is filled with water seal liquid that can submerge the bottom dust outlet pipe 603. By setting the water seal, the discharge from the second pyrolysis device 200 and the gas distributor 300 can be incorporated into the water seal liquid, reducing pollutant emissions. Furthermore, the water tank 600 is equipped with a purification device 601. The purification device 601 can be an existing three-stage wastewater purifier. The three-stage wastewater purifier can circulate and purify the water seal liquid in the water tank 600 to maintain the purity of the water seal liquid. A first water pump 602 connected to the water tank 600 can be used to draw the water seal liquid from the water tank to the purification device 601 for purification. For efficient utilization, the water seal fluid can be pumped into the water tank 600 via a conveying device, such as a second water pump 604 connected to the water tank 600, to achieve efficient utilization of the water seal fluid for dust collection. More specifically, a urea release device can be installed to further purify the water seal fluid. By releasing urea into the water tank 600 through the urea release device, the urea reacts with nitrogen oxides in the dust within the water tank 600 to generate waste with lower environmental pollution, further reducing pollution emissions.

[0064] In some embodiments of the present application, the waste incineration system 1000 further comprises an induced draft fan, which is used to drive the flue gas generated by the first pyrolysis device 100 to flow to the gas distributor 300. It can be understood that, in order to make the gas flow in the waste incineration system 1000 and improve the flow efficiency, the induced draft fan can be arranged downstream of the gas distributor 300. The induced draft fan can refer to the existing structure of the induced draft fan. By arranging the induced draft fan, the gas flow in the waste incineration system 1000 is driven, so that the tail gas generated by the first pyrolysis device 100 flows to the gas distributor 300, the flow speed is improved, and the efficiency of waste treatment is improved.

[0065] As shown in Figure 3 In some embodiments of the present application, the waste incineration system 1000 further comprises a particle collection device, and the first pyrolysis device 100 further comprises a first ash hole 171 and a rotary grate. The first ash hole 171 is arranged at the bottom of the first pyrolysis cavity 11, and the first ash hole 171 is in communication with the particle collection device. The rotary grate comprises a rotary disc 173 and a driving device 174. The rotary disc 173 is provided with a second ash hole 172. The rotary disc 173 is rotatably arranged at the bottom of the first pyrolysis cavity 11. The driving device 174 is used to drive the rotary disc 173 to rotate so that the second ash hole 172 is intermittently communicated with the first ash hole 171.

[0066] It can be understood that a plurality of first ash holes 171 are arranged at the bottom of the first pyrolysis cavity 11 in a circumferential direction of the first pyrolysis cavity 11, and the first ash holes 171 are in communication with the outside of the first pyrolysis device 100. A rotating disc 173 is arranged at the bottom of the first pyrolysis cavity 11, and the rotating disc 173 is rotatable by a driving device 174. The rotating disc 173 is provided with a rotating shaft 175 at the middle portion, the rotating shaft 175 is coaxially arranged with the first pyrolysis cavity 11 and is fixed to the cavity wall of the first pyrolysis cavity 11. The rotating disc 173 is rotatably connected with the rotating shaft 175 through a bearing, the inner ring of the bearing is sleeved on the rotating shaft 175, and the outer ring of the bearing is inserted into a through hole on the rotating disc 173. In order to reinforce the connection between the rotating disc 173 and the rotating shaft 175, a reinforcing member is further arranged at the top of the rotating disc 173, the reinforcing member is sleeved on the bearing, and the reinforcing member is fixed to the rotating disc 173 through bolts. A plurality of second ash holes 172 corresponding to the positions of the first ash holes 171 are arranged on the rotating disc 173. When the driving device 174 drives the first bevel gear 177a to rotate through a transmission shaft 176, the first bevel gear 177a drives the annular tooth surface on the rotating disc 173 to rotate, thereby driving the rotating disc 173 to rotate. At this time, the second ash holes 172 are in intermittent communication with the first ash holes 171, so that the garbage and dust falling on the rotating disc 173 is tumbled by the rotating disc 173 and discharged from the second ash holes 172 to the first ash holes 171 in the first pyrolysis cavity 11. In order to facilitate the collection of dust, a particle collection device such as a dust box or a container capable of containing particulate matter is arranged. A passage is arranged on the outside of the first ash holes 171 and is in communication with the particle collection device, so that the dust can be discharged into the particle collection device. Further, a bagging machine can be arranged to timely bag and package the garbage in the particle collection device.

[0067] As shown in Figure 3 some embodiments of the present application, the driving device 174 is in the form of a motor driving the first bevel gear 177a. The motor is connected with the first bevel gear 177a through a driving shaft to drive the first bevel gear 177a to rotate. The first bevel gear 177a is arranged in the first pyrolysis cavity 11 and is engaged with the annular tooth structure arranged on the outer edge of the rotating disc 173, so that the rotation of the first bevel gear 177a can drive the rotating disc 173 to rotate. In order to reduce the influence of dust on the transmission structure of the driving device 174, a dust baffle is further arranged in the first pyrolysis cavity 11. The dust baffle is arranged above the first bevel gear 177a and the driving shaft to reduce the dust falling into the engagement surface of the first bevel gear 177a and the connection between the driving shaft and the bearing, thereby affecting the rotating movement of the driving device 174.

[0068] As shown in Figure 4As shown, in some embodiments of the present invention, the second bevel gear 177b may also be disposed below the rotating disk 173, the support disk 178 is mounted on the bottom end of the first pyrolysis chamber 11 by a support frame, the support disk 178 is provided with a first row of ash holes 171, the rotating disk 173 is disposed above the support disk 178, the diameter of the rotating disk 173 is larger than that of the support disk 178, a rotating shaft 175 is disposed at the center of the support disk 178, the bottom end of the rotating shaft 175 is connected to the support disk 178, and the top end of the rotating shaft 175 is connected to the rotating disk 173. The rotating disk 173 is rotatably connected to the support disk 178 through the rotating shaft 175, and a bearing may be provided at the connection to reduce frictional resistance. A ring-shaped tooth structure is provided on the lower side of the rotating disk 173, that is, a ring-shaped tooth structure is provided on the portion of the rotating disk 173 that extends radially beyond the support disk 178. The second bevel gear 177b and the drive shaft 176 are located below the rotating disk 173, and the second bevel gear 177b meshes with the ring-shaped tooth structure. The drive shaft 176 passes through the cavity wall of the first pyrolysis chamber 11. One end of the drive shaft 176 is connected to the second bevel gear 177b, and the other end is connected to the motor. This allows the motor to drive the second bevel gear 177b to rotate, thereby driving the rotating disk 173 to rotate, so as to agitate the waste in the first pyrolysis chamber 11 and improve the pyrolysis efficiency. Furthermore, the second row of ash holes 172 on the rotating disk 173 can intermittently communicate with the first row of ash holes 171 on the support disk 178, allowing ash to be discharged from the first pyrolysis chamber 11 for easy collection of pyrolysis dust. In addition, the support plate 178 and the rotating plate 173 are coaxially arranged with the first pyrolysis chamber 11, and there is a gap between the support plate 178 and the cavity wall of the first pyrolysis chamber 11. A baffle 179 is provided above the support plate 178. The baffle 179 can block the gap between the support plate 178 and the cavity wall of the first pyrolysis chamber 11. The baffle 179 is inclined so that the dust on the baffle 179 can fall onto the support plate 178.

[0069] like Figure 3 and Figure 7 As shown, in some embodiments of the present invention, an air blowing pipe communicating with the second air blowing port 43 is provided at the bottom of the first pyrolysis chamber 11. By blowing air onto the bottom of the first pyrolysis chamber 11, the dust at the bottom of the first pyrolysis chamber 11 can be blown up and turned by the airflow, so that the dust can be driven by the rotating disk 173 to fall into the second dust hole 172 and be discharged out of the first pyrolysis chamber 11.

[0070] like Figure 1As shown, in some embodiments of the present application, the waste incineration system 1000 further comprises a hot air filter 301, which is installed on the gas diverter 300. The hot air filter 301 is used to filter the tail gas of the second pyrolysis device 200 before the gas is diverged. The hot air filter 301 can refer to the existing structure of the hot air filter. That is, the hot air filter 301 has an inlet and an outlet. The inlet of the hot air filter 301 is in communication with the first diverging outlet 32 of the gas diverter 300. The outlet of the hot air filter 301 is in communication with the preheating chamber through a pipeline. In this way, the tail gas of the second pyrolysis device 200 is filtered before being diverged, and then flows back to the first pyrolysis chamber 11 to continue heating the waste, and flows back to the preheating chamber to preheat the waste, thereby reducing the phenomenon that too many impurities in the backflow hot gas block the pipeline.

[0071] In some embodiments of the present application, the waste incineration system 1000 further comprises a generator. The generator can be a single-cylinder diesel generator. The generator is used to supply power to the induced draft fan, the water pump, the conveyor, and the control system.

[0072] In some embodiments of the present application, the waste incineration system 1000 is further provided with a control device. The control device is in communication connection with each burner, water pump, and other moving equipment. The waste incineration system 1000 is further provided with a plurality of sensors for monitoring the gas flow rate in each container and pipeline, the water seal liquid level, the temperature in the pyrolysis chamber, the weight of the waste, the pollutant concentration of the tail gas, and the operating parameters of each device, etc. Each sensor is in communication connection with the control device, so that the user can monitor the operation of the system in a timely manner. Specifically, the second pyrolysis device 200 is further provided with a sensor for monitoring the pyrolysis of the waste in the second pyrolysis chamber 21. The pyrolysis of the waste in the second pyrolysis chamber 21 is monitored in real time to adjust the first pyrolysis device 100. For example, when the pyrolysis of the second pyrolysis device 200 is not sufficient, the pyrolysis temperature of the first pyrolysis device 100 is increased, or the temperature of the preheating chamber is increased. Specifically, the flow rate of the hot gas flowing back to the first pyrolysis device 100 and the flow rate of the hot gas flowing back to the preheating chamber can be controlled to achieve the above-mentioned purpose. The burning effect of the first burner 15 can also be controlled to achieve the above-mentioned purpose.

[0073] The above description is only a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. Any changes or replacements within the technical scope disclosed in the present application can be easily thought of by those skilled in the art, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A waste incineration system, characterized by, The garbage incineration system comprises: a first pyrolysis device comprising a first pyrolysis cavity, a first inlet, a first outlet, a backflow gas inlet and a first burner, the first inlet, the first outlet and the backflow gas inlet are in communication with the first pyrolysis cavity, the first inlet is used for receiving garbage, and the first burner is used for igniting garbage in the first pyrolysis cavity; a gas diverter comprising a diverter inlet, a first diverter outlet and a second diverter outlet, the diverter inlet is in communication with the first diverter outlet and the second diverter outlet respectively, the diverter inlet is also in communication with the first outlet, the first diverter outlet is in communication with the backflow gas inlet, and the second diverter outlet is used for communicating with a tail gas treatment system; the garbage incineration system further comprises a second pyrolysis device, the second pyrolysis device is arranged between the first pyrolysis device and the gas diverter, and the second pyrolysis device comprises a second pyrolysis cavity, a second inlet, a second outlet and a second burner, the second inlet and the second outlet are in communication with the second pyrolysis cavity, the second inlet is also in communication with the first outlet of the first pyrolysis cavity, the second outlet is in communication with the diverter inlet, and the second burner is used for igniting garbage in the second pyrolysis cavity; the first pyrolysis device further comprises an air supply assembly, the air supply assembly is arranged inside the first pyrolysis cavity, the air supply assembly comprises an air cavity, an air inlet and an air outlet, the air inlet and the air outlet are in communication with the air cavity, and the air inlet is in communication with the backflow gas inlet; the first pyrolysis device further comprises a support, the air supply assembly is connected with the cavity wall of the first pyrolysis cavity through the support, the first pyrolysis cavity has a rotary body structure, the air supply assembly has a straight pipe structure, and the air supply assembly is arranged coaxially with the first pyrolysis cavity, a plurality of air outlets are arranged along the circumferential direction and the axial direction of the air supply pipe respectively; wherein the first burner is closed after igniting garbage, and hot gas entering through the backflow gas inlet makes the garbage burn in an oxygen-free state; the air outlets are arranged in multiple rows along the circumferential direction of the air supply pipe, and adjacent two rows of air outlets are arranged staggered, so as to generate a cyclone in the first pyrolysis cavity; the garbage incineration system further comprises a blowing sub-system, the blowing sub-system comprises a heat exchanger and a blower, part of the heat exchanger is arranged inside the second pyrolysis cavity, the inlet of the heat exchanger is in communication with the outlet of the blower, the first pyrolysis device further comprises a first blowing port, the first blowing port is arranged on the radial side wall of the first pyrolysis cavity, the first blowing port is in communication with the first pyrolysis cavity, and the outlet of the heat exchanger is in communication with the first blowing port; the first inlet is arranged on the radial side wall of the first pyrolysis cavity, the first blowing port is arranged below the first inlet along the height direction of the first pyrolysis cavity, and the first blowing port is arranged close to the first inlet; The first pyrolysis device further comprises a second blowing port, which is arranged on the radial cavity wall of the first pyrolysis cavity and is arranged close to the bottom end of the first pyrolysis cavity, the second blowing port is in communication with the first pyrolysis cavity, and the second blowing port is also in communication with the outlet of the heat exchanger; The waste incineration system further comprises a particle collecting device, the first pyrolysis device further comprises a first ash discharge hole and a rotary grate, the first ash discharge hole is arranged at the bottom of the first pyrolysis cavity, the first ash discharge hole is in communication with the particle collecting device, the rotary grate comprises a rotary disc and a driving device, the rotary disc is provided with a second ash discharge hole, the rotary disc is rotatably arranged at the bottom of the first pyrolysis cavity, and the driving device is used to drive the rotary disc to rotate so that the second ash discharge hole is intermittently communicated with the first ash discharge hole. The middle part of the rotary disc is provided with a rotating shaft, the rotating shaft is coaxially arranged with the first pyrolysis cavity and is fixed on the cavity wall of the first pyrolysis cavity, a plurality of second ash discharge holes corresponding to the positions of the first ash discharge hole are arranged on the rotary disc, the driving device comprises a first bevel gear, a transmission shaft and a motor, the transmission shaft is arranged through the cavity wall of the first pyrolysis cavity, the motor is arranged outside the first pyrolysis cavity and is in transmission connection with the first bevel gear through the transmission shaft, the outer edge of the rotary disc is provided with an annular tooth structure, the first bevel gear is in meshing connection with the annular tooth structure, when the first bevel gear rotates, the first bevel gear drives the rotary disc to rotate through the annular tooth structure, so that the second ash discharge hole can be intermittently communicated with the first ash discharge hole. The blowing direction of the second blowing port is arranged towards the rotary grate; The heat exchanger is a disc pipe type heat exchanger, the disc pipe structure of the heat exchanger is arranged along the axial direction of the second pyrolysis cavity, the inlet of the heat exchanger extends out of the second pyrolysis device and is in communication with the air blower, and the outlet of the heat exchanger is in communication with the first blowing port and the second blowing port respectively.

2. The waste incineration system according to claim 1, characterized in that, The waste incineration system further comprises a waste pretreatment subsystem, the waste pretreatment subsystem comprises a waste treatment device, a conveying device and a preheating device, the conveying device is used to convey the waste treated by the waste treatment device to the first inlet, the preheating device is installed on the conveying device, the preheating device is provided with a preheating cavity, a preheating inlet and a preheating outlet, the preheating inlet and the preheating outlet are both in communication with the preheating cavity, the preheating inlet is in communication with the first shunt outlet, and the preheating outlet is in communication with the backflow air inlet.

3. The waste incineration system according to claim 1, characterized in that, The waste incineration system further comprises a dust removal subsystem, the dust removal subsystem comprises a water pool, a purification device and a conveying device, at least one of the second pyrolysis device and the gas shunt is provided with a bottom dust outlet pipe, the bottom dust outlet pipe extends into the water pool, the water pool is used to hold a water seal liquid which is higher than the bottom end of the bottom dust outlet pipe, the purification device is used to purify the water seal liquid, and the conveying device is used to convey the water seal liquid to the purification device.

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