A high-efficiency domestic waste pyrolysis gasification furnace system

Abstract

The present invention relates to a high-efficiency pyrolysis gasification furnace system for domestic waste, and belongs to the technical field of domestic waste incineration treatment equipment. The pyrolysis gasification furnace system includes a feed bin, a double-roller feeding device, an upper flue, an upper cover, a furnace cover seat, a furnace body, a grate assembly, a grate transmission device, a rotating platform, a furnace body transmission device, a furnace body support seat, a bottom support seat, a primary air supply duct, a slag discharge device, and a concrete water tank. The high-efficiency pyrolysis gasification furnace system for domestic waste of the present invention has a novel structure, efficient and environmentally friendly operation, and is suitable for high-efficiency and environmentally friendly small-scale waste treatment projects in small counties and towns in developed areas at home and abroad, with a treatment scale of 50 to 500 tons of domestic waste per day, and is easy to promote and apply.

Description

Technical Field

[0001] The invention belongs to the technical field of domestic waste incineration treatment equipment, and in particular relates to a high-efficiency domestic waste pyrolysis gasification furnace system. Background Art

[0002] Domestic waste is not only the culprit of environmental pollution, but also a potential resource. Scientific and rational use of it to turn waste into treasure has become an urgent problem that the world needs to solve. At present, there are three main domestic waste treatment technologies: incineration, landfill and composting. The mainstream is direct incineration, which puts the garbage into an incinerator for combustion treatment. However, the domestic domestic waste is large in volume, low in calorific value, and complex in composition, which is very inconvenient to handle. First, the domestic waste in a region is extremely scattered, uncompressed, and large in volume, resulting in high transportation costs; secondly, the domestic waste is not sorted, has high moisture content, and low in calorific value, so the combustion is very unstable and incomplete, resulting in incomplete combustion, large amount of slag, and low thermal energy utilization efficiency; thirdly, incomplete combustion is very likely to produce excessive flue gas and fly ash, leading to pollution and other environmental problems.

[0003] In recent years, with the strengthening of environmental awareness and the introduction of increasingly stringent national and local environmental protection policies and regulations, "harmlessness, reduction and resource utilization" have become the basic principles to be followed in the treatment and disposal of domestic waste, and how to enhance the control of secondary pollution is becoming increasingly important. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and provide a high-efficiency domestic waste pyrolysis gasification furnace system. The system has a novel structure, efficient and environmentally friendly operation, and is suitable for high-efficiency and environmentally friendly small-scale waste treatment projects in small counties and towns in developed areas at home and abroad. The relatively small-scale (50-500t / d) domestic waste treatment devices are serialized and highly standardized.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A high-efficiency domestic waste pyrolysis gasification furnace system, comprising a feed bin, a double-roller feeding device, an upper flue, an upper cover, a furnace cover seat, a furnace body, a grate assembly, a grate transmission device, a rotating platform, a furnace body transmission device, a furnace body support seat, a bottom support seat, a primary air supply duct, a slag discharge device and a concrete water tank;

[0007] A double-roller feeding device is installed at the lower part of the feeding bin at the upper end of the upper cover;

[0008] The discharge port of the double-roller feeding device is connected to the discharge port of the upper cover;

[0009] The upper flue inlet is connected to the flue outlet of the upper cover;

[0010] The upper cover is fastened to the furnace cover seat, and the furnace cover seat is fixedly installed on the equipment foundation;

[0011] The upper end of the furnace body with water seal structure is rotatably connected to the lower end of the furnace cover seat;

[0012] The grate assembly is rotatably connected to the core shaft at the bottom of the furnace body support seat inside the furnace body; the grate assembly is drivingly connected to the grate transmission device;

[0013] The grate transmission device is fixedly installed on the side of the furnace body;

[0014] The rotating platform is rotatably connected to the furnace body support seat; the rotating platform is transmission-connected to the furnace body transmission device;

[0015] The upper end of the rotating platform is fixedly connected to the lower end of the furnace body;

[0016] The furnace body support seat is fixedly connected to the bottom support seat;

[0017] The bottom support seat is fixedly installed on the equipment foundation;

[0018] The air inlet of the primary air supply duct is installed above the middle of the concrete water tank below the furnace body support seat, and the primary air supply duct is connected to the furnace body;

[0019] The slag discharge device is fixedly installed on the equipment foundation above the concrete water tank and below the slag outlet at the bottom of the furnace body;

[0020] Further, preferably, the feed bin is in a rectangular shape.

[0021] Further, preferably, the double-roller feeding device comprises two sets of servo motors, two sets of roller assemblies and a rectangular parallelepiped bracket body;

[0022] The upper end of the bracket body is fixedly connected to the lower discharge port of the feed bin, and the lower end is fixedly connected to the upper feed port of the upper cover;

[0023] The two groups of roller assemblies are arranged in parallel and connected to the bracket body, and the two groups of servo motors are respectively connected to the two groups of roller assemblies in a transmission manner;

[0024] The two groups of roller assemblies feed materials when they both rotate inwards, with the rotation direction of one group of rollers being opposite to that of the other group of rollers.

[0025] Further, preferably, the grate assembly includes a first scraper, a positive rotation active grate, a first positive rotation driven grate, a second positive rotation driven grate, a third positive rotation driven grate, a grate cap active sleeve shaft, an upper bearing, a fixed mandrel, a lower bearing, a thrust bearing, an upper shaft cover, a lower shaft cover and a wind chamber;

[0026] The forward active grate, the first forward driven grate, the second forward driven grate and the third forward driven grate are all provided with slag discharge holes; the slag discharge holes are communicated with the wind chamber;

[0027] The positive rotation active grate, the first positive rotation driven grate, the second positive rotation driven grate and the third positive rotation driven grate are all annular grates, and scrapers are fixed at the radial edges; the multiple layers of annular grates are stacked in a tower shape, and the central axis of each layer of annular grates is eccentrically arranged with respect to the rotation axis of the fixed mandrel fixed at the bottom of the grate;

[0028] The wind chamber is located in the hollowed-out area below the solid castings of the forward active grate, the first forward driven grate, the second forward driven grate, and the third forward driven grate; the primary air is led to each wind chamber from the branch of the pipe at the bottom of the furnace body through the primary air supply duct;

[0029] The forward-rotating active grate, the first forward-rotating driven grate, the second forward-rotating driven grate, and the third forward-rotating driven grate are all fixedly connected to the active sleeve shaft;

[0030] The forward active grate, the first forward driven grate, the second forward driven grate, and the third forward driven grate are arranged in a step-by-step manner from bottom to top, with a distance between adjacent grates, and the radial direction is getting smaller and smaller;

[0031] The conical grate cap at the top of the grate assembly is provided with through holes around it, and is fastened to the through holes corresponding to the third forward-rotating driven grate by bolts;

[0032] The active sleeve shaft is movably sleeved with the fixed core shaft;

[0033] The upper end of the active sleeve shaft is fixed with an upper shaft cover to prevent axial movement; the lower end of the active sleeve shaft is sealed with a lower shaft cover;

[0034] The upper bearing shell and the lower bearing shell are connected to the upper and lower inner holes of the active sleeve shaft by interference fit, and are connected to the fixed core shaft by clearance fit to form upper and lower sliding bearing friction pairs;

[0035] The fixed mandrel is fixedly connected to the furnace body support seat;

[0036] A thrust bearing is also provided between the fixed core shaft at the bottom of the furnace body support seat and the lower end of the active sleeve shaft;

[0037] The grate transmission device comprises a large bevel gear, a small bevel gear, a grate frequency conversion motor and a grate reduction device;

[0038] The grate frequency conversion motor is connected to the small bevel gear via a grate reduction device;

[0039] The small bevel gear is located in the furnace body and is meshedly connected with the large bevel gear;

[0040] The large bevel gear is fixedly connected to the lower end surface of the forward-rotating active grate.

[0041] Further, preferably, the furnace body transmission device includes a furnace body pinion, a furnace body outer gear ring, a furnace body reduction device and a furnace body variable frequency motor;

[0042] The upper end surface of the outer gear ring of the furnace body is fixedly connected to the lower end surface of the rotating platform;

[0043] The inner hole of the furnace body outer gear ring is rotatably connected to the furnace body support seat through a cylindrical roller bearing;

[0044] The furnace body frequency conversion motor is fixedly installed on the furnace body support seat;

[0045] The furnace body variable frequency motor is connected to the furnace body pinion through a furnace body speed reduction device;

[0046] The furnace body pinion and the furnace body outer gear ring are meshed and connected, and the furnace body pinion is located at the lower side of the furnace body outer gear ring to avoid dust and oil accumulation causing jamming and other faults;

[0047] Further, preferably, the slag discharge device comprises a slag discharge trough, a slag discharge scraper, a slag discharge swing arm articulated oil cylinder, a front arm articulated oil cylinder, a rear arm articulated oil cylinder, a rear arm, a front arm, a first scraper and a support;

[0048] The support of the slag discharge device is installed on the concrete water tank equipment foundation;

[0049] The cylinder body of the forearm articulated oil cylinder is hinged on the front end of the support; the forearm articulated oil cylinder is symmetrically arranged on both sides of the support;

[0050] The cylinder body of the rear arm articulation oil cylinder is articulated on the rear arm and is symmetrically arranged on the rear arm near the end side of the main supporting connecting rod;

[0051] The first scraper is welded and connected to the forearm fixing pin after being positioned;

[0052] The front arm, rear arm and slag scraper are sequentially connected to form a connecting rod mechanism;

[0053] The slag discharge chute is fixed on the rear end of the support;

[0054] The cylinder body of the slag unloading swing arm hinged oil cylinder is hinged on the rear end of the support;

[0055] The slag unloading scraper is driven by a slag unloading swing rod hinged to an oil cylinder.

[0056] Compared with the prior art, the present invention has the following beneficial effects:

[0057] (1) Due to the relative rotation between the furnace body and the furnace body support seat, and between the furnace body and the furnace cover seat, the internal grate assembly and the furnace body also rotate relative to each other; at the same time, the rotation direction and speed of the furnace body are controlled by the furnace body frequency conversion motor, and the rotation direction and speed of the grate are controlled by the grate frequency conversion motor; therefore, the device structure described in the present invention includes external rotation and internal rotation, which are two independent parts. When each layer of the grate is blocked by residue, by controlling the forward and reverse rotation of the grate frequency conversion motor or the furnace body frequency conversion motor, a reverse friction force is generated between the grate and the furnace wall of the furnace body and an extrusion force between the slag, so that the residue is squeezed and crushed into particles that can be smoothly discharged to the outside of the furnace body, effectively ensuring the continuity and smoothness of the slag discharge.

[0058] (2) The frequency conversion controls the automatic rotation of the furnace body (including the parts fixedly connected to the furnace body), which not only ensures the uniform distribution of garbage in the furnace body, but also avoids the local accumulation and compaction caused by the irregular and irregular fixed feeding of materials at the front end in the feeding bin. Under the operation of the double-stick feeding device, it also has certain chopping, stirring and uniform feeding functions. Therefore, the device of the present invention can effectively ensure the stability of the incineration condition and further reduce the heat loss rate when feeding at the front end, and the reduction is obvious.

[0059] (3) Since the grate is arranged in an "umbrella" shape, the central axis of each ring-shaped grate plate is eccentric to the axis of the rotating sleeve shaft supporting the grate of this layer. During the rotation process, the solid waste and slag fusion generate a strong lateral extrusion force between the different intervals between the grate and the furnace wall. As a result, the residual slag in the furnace is finally crushed and falls into the slag outlet through the slag discharge holes and gaps of the grate and is discharged out of the furnace body, ensuring the continuity of the entire gasification furnace combustion cycle.

[0060] (4) Since the furnace body components (including the rotating platform, etc.) are rotating and the furnace cover base components (including the upper cover, etc.) are fixed, the flue gas seal is achieved between the two through an effective water-cooled jacket sealing technology, thereby effectively solving the problem of secondary pollution caused by the leakage of flue gas mixture due to poor sealing between the furnace cover base and the furnace body; and since the slag discharge device is a typical "arm-type" connecting rod mechanism with a simple overall structure, it can achieve two-way selection of fully automated remote control and on-site emergency operation through hydraulic transmission. The main body of the equipment is above the water surface with a low probability of failure and is easy to safely repair in case of failure. Therefore, the fully water-cooled and reduced smaller block or granular slag can be directly transported for secondary utilization.

[0061] (5) Since the labyrinth sealing technology of the water seal structure ensures that the system of the invention has good airtightness, the power consumption required for flue gas diversion is greatly reduced compared with traditional furnace types; and since the flue gas is leak-proof and sealed, the slag is safely transported harmlessly, so the harmless treatment of the invention is very obvious; and since the high-temperature pyrolysis gas and water vapor can be purified, refined, and compressed to form secondary thermal energy, such as clean gas, hot water heating, steam insulation, preheating flue gas, steam power generation, etc.; the slag can also be used as a secondary material, such as magnetic separation to recover ferrous metals, fine materials to make cement raw materials, and coarse materials to crush bricks, etc., so the device of the invention effectively improves the energy utilization rate of the pyrolysis gasification furnace of the incinerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Figure 1 It is a structural schematic diagram of a high-efficiency domestic waste pyrolysis gasification furnace system of the present invention;

[0063] Figure 2 It is a structural schematic diagram of a grate assembly and a grate transmission device of a high-efficiency domestic waste pyrolysis gasification furnace system of the present invention;

[0064] Figure 3 It is a schematic diagram of the structure of the water seal device of the high-efficiency domestic waste pyrolysis gasification furnace system of the present invention;

[0065] Figure 4 A schematic diagram of the combustion principle of the high-efficiency domestic waste pyrolysis gasification furnace system of the present invention;

[0066] Among them, 1. feed bin; 2. double-roller feeding device; 3. upper flue; 4. upper cover; 5. furnace cover seat; 6. furnace body; 7. grate assembly; 8. grate transmission device; 9. rotating platform; 10. furnace body transmission device; 11. furnace body support seat; 12. bottom support seat; 13. primary air supply duct; 14. slag discharge device; 15. concrete water tank; 2-1. two sets of servo motors; 2-2. two sets of roller assemblies; 2-3. rectangular bracket body; 5-1. bottom plate; 5-2. first through hole; 6-1. water seal device; 6-1.1. annular water seal groove; 6-1.2. separation ring; 6-1.3. second through hole; 6-1.4. sewage outlet ;6-1.5, drain outlet;6-2, exhaust outlet;6-3, slag outlet;7-1, scraper;7-2, positive rotation active grate;7-3, first positive rotation driven grate;7-4, second positive rotation driven grate;7-5, third positive rotation driven grate;7-6, grate cap;7-7, active sleeve shaft;7-8, upper bearing;7-9, upper shaft cover;7-10, fixed mandrel;7-11, lower bearing;7-12, thrust bearing;7-1 3. Lower shaft cover; 7-14. Wind chamber; 8-1. Large bevel gear; 8-2. Small bevel gear; 8-3. Grate frequency conversion motor; 8-4. Grate speed reducer; 10-1. Furnace body pinion; 10-2. Furnace body outer gear ring; 10-3. Furnace body speed reducer; 10-4. Furnace body frequency conversion motor; 14-1. Slag unloading chute; 14-2. Slag unloading scraper; 14-3. Slag unloading swing arm articulated cylinder; 14-4. Forearm articulated cylinder; 14-5. Rear arm articulated cylinder; 14-6. Rear arm; 14-7. Forearm; 14-8. First scraper; 14-9. Support. DETAILED DESCRIPTION

[0067] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0068] Those skilled in the art will understand that the following examples are only used to illustrate the present invention and should not be considered to limit the scope of the present invention. If no specific technology, connection relationship or condition is specified in the examples, the technology, connection relationship, condition described in the literature in the field or the product specification is used. If the manufacturer of the materials, instruments or equipment used is not specified, they are all conventional products that can be purchased.

[0069] It will be understood by those skilled in the art that, unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present invention refers to the presence of the features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we say that an element is "connected" to another element, it can be directly connected to the other element, or there can be intermediate elements.

[0070] In the description of the present invention, unless otherwise specified, "plurality" means two or more than two. The terms "inside", "upper", "lower", etc., indicating positions or state relationships, are based on the positions or state relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operate in a specific position, and therefore cannot be understood as limiting the present invention.

[0071] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention will be understood according to specific circumstances.

[0072] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art in the art to which the present invention belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless defined as herein.

[0073] Example 1

[0074] like Figure 1 As shown, a high-efficiency domestic waste pyrolysis gasification furnace system includes a feed bin 1, a double-roller feeding device 2, an upper flue 3, an upper cover 4, a furnace cover seat 5, a furnace body 6, a grate assembly 7, a grate transmission device 8, a rotating platform 9, a furnace body transmission device 10, a furnace body support seat 11, a bottom support seat 12, a primary air supply duct 13, a slag discharge device 14 and a concrete water tank 15;

[0075] A double-roller feeding device 2 is installed at the lower part of the feed bin 1 at the upper end of the upper cover 4;

[0076] The discharge port of the double-roll feeding device 2 is connected to the discharge port of the upper cover 4;

[0077] The inlet of the upper flue 3 is connected to the flue outlet of the upper cover 4;

[0078] The upper cover 4 is fastened to the furnace cover seat 5, and the furnace cover seat 5 is fixedly installed on the equipment foundation;

[0079] The upper end of the furnace body 6 with the water seal structure is rotatably connected to the lower end of the furnace cover seat 5 with the water seal structure;

[0080] The grate assembly 7 is rotatably connected to the bottom mandrel of the furnace body support seat 11 inside the furnace body 6; the grate assembly 7 is transmission-connected to the grate transmission device 8;

[0081] The grate transmission device 8 is fixedly mounted on the side of the furnace body 6;

[0082] The rotating platform 9 is rotatably connected to the furnace body support seat 11; the rotating platform 9 is transmission-connected to the furnace body transmission device 10;

[0083] The upper end of the rotating platform 9 is fixedly connected to the lower end of the furnace body 6;

[0084] The furnace body support base 11 is fixedly connected to the bottom support base 12;

[0085] The bottom support seat 12 is fixedly installed on the equipment foundation;

[0086] The air inlet of the primary air supply duct 13 is installed above the middle of the concrete water tank 15 below the furnace body support seat 11, and the primary air supply duct 13 is connected to the furnace body 6;

[0087] The slag discharge device 14 is fixedly installed on the equipment foundation above the concrete water tank 15 and below the slag discharge port at the bottom of the furnace body 6 .

[0088] Example 2

[0089] like Figures 1-2 As shown, a high-efficiency domestic waste pyrolysis gasification furnace system includes a feed bin 1, a double-roller feeding device 2, an upper flue 3, an upper cover 4, a furnace cover seat 5, a furnace body 6, a grate assembly 7, a grate transmission device 8, a rotating platform 9, a furnace body transmission device 10, a furnace body support seat 11, a bottom support seat 12, a primary air supply duct 13, a slag discharge device 14 and a concrete water tank 15;

[0090] A double-roller feeding device 2 is installed at the lower part of the feed bin 1 at the upper end of the upper cover 4;

[0091] The discharge port of the double-roll feeding device 2 is connected to the discharge port of the upper cover 4;

[0092] The inlet of the upper flue 3 is connected to the flue outlet of the upper cover 4; the upper flue 3 is a transition flue connecting the gasification furnace body device and the comprehensive utilization or treatment of flue gas;

[0093] The upper cover 4 is fastened to the furnace cover seat 5, and the furnace cover seat 5 is fixedly installed on the equipment foundation;

[0094] The upper end of the furnace body 6 with a water seal structure is rotatably connected to the lower end of the furnace cover seat 5 with a water seal structure, and sealing is achieved through the water seal;

[0095] The grate assembly 7 is rotatably connected to the bottom mandrel of the furnace body support seat 11 inside the furnace body 6; the grate assembly 7 is transmission-connected to the grate transmission device 8;

[0096] The grate transmission device 8 is fixedly mounted on the side of the furnace body 6;

[0097] The rotating platform 9 is rotatably connected to the furnace body support seat 11; the rotating platform 9 is transmission-connected to the furnace body transmission device 10;

[0098] The upper end of the rotating platform 9 is fixedly connected to the lower end of the furnace body 6;

[0099] The furnace body support base 11 is fixedly connected to the bottom support base 12;

[0100] The bottom support seat 12 is fixedly installed on the equipment foundation;

[0101] The air inlet of the primary air supply duct 13 is installed above the middle of the concrete water tank 15 below the furnace body support seat 11, and the primary air supply duct 13 is connected to the furnace body 6;

[0102] The slag discharge device 14 is fixedly installed on the equipment foundation above the concrete water tank 15 and below the slag outlet at the bottom of the furnace body 6; the slag discharge device 14 controls the ash and slag at the slag outlet at the bottom of the furnace body 6 to fall into the concrete water tank 15 for cooling in an orderly manner through the hydraulic and connecting rod equipment in the device.

[0103] Preferably, the feed bin 1 is in the shape of a cuboid, and more preferably, the four inner corners are rounded and smooth.

[0104] Preferably, the double-roller feeding device 2 comprises two sets of servo motors 2-1, two sets of roller assemblies 2-2 and a rectangular parallelepiped bracket body 2-3;

[0105] The upper end of the bracket body 2-3 is fixedly connected to the lower discharge port of the feed bin 1, and the lower end is fixedly connected to the upper feed port of the upper cover 4;

[0106] The two groups of roller assemblies 2-2 are arranged in parallel and connected to the bracket body 2-3, and the two groups of servo motors 2-1 are respectively connected to the two groups of roller assemblies 2-2 in a transmission manner;

[0107] The two groups of roller assemblies 2-2 feed materials when they both rotate inwards, with the rotation direction of one group of rollers being opposite to that of the other group of rollers.

[0108] The front and rear sides of the two groups of roller assemblies 2-2 are designed with detachable flange connections with threaded fastening connection, which are respectively installed on the front and rear sides of the bracket body 2-3. The left and right sides are also designed with detachable flange connection large cover plates 2-5 with threaded fastening connection, which are respectively installed on the left and right sides of the bracket body 2-3.

[0109] After adopting the above structure, when the larger volume of materials in the feed bin is blocked and causes the two groups of roller assemblies 2-2 to malfunction, the small cover plate 2-4 and the large cover plate 2-5 can be used as inspection holes, and at least one of the cover plates can be opened to remove the blockage, and the double-roller feeding device 2 can be inspected without stopping the furnace. The structure is simple and the operation is convenient.

[0110] Example 3

[0111] like Figures 1-2 As shown, a high-efficiency domestic waste pyrolysis gasification furnace system includes a feed bin 1, a double-roller feeding device 2, an upper flue 3, an upper cover 4, a furnace cover seat 5, a furnace body 6, a grate assembly 7, a grate transmission device 8, a rotating platform 9, a furnace body transmission device 10, a furnace body support seat 11, a bottom support seat 12, a primary air supply duct 13, a slag discharge device 14 and a concrete water tank 15;

[0112] A double-roller feeding device 2 is installed at the lower part of the feed bin 1 at the upper end of the upper cover 4;

[0113] The discharge port of the double-roll feeding device 2 is connected to the discharge port of the upper cover 4;

[0114] The inlet of the upper flue 3 is connected to the flue outlet of the upper cover 4; the upper flue 3 is a transition flue connecting the gasification furnace body device and the comprehensive utilization or treatment of flue gas;

[0115] The upper cover 4 is fastened to the furnace cover seat 5, and the furnace cover seat 5 is fixedly installed on the equipment foundation;

[0116] The upper end of the furnace body 6 with a water seal structure is rotatably connected to the lower end of the furnace cover seat 5, and is sealed by the water seal;

[0117] The grate assembly 7 is rotatably connected to the bottom mandrel of the furnace body support seat 11 inside the furnace body 6; the grate assembly 7 is transmission-connected to the grate transmission device 8;

[0118] The grate transmission device 8 is fixedly mounted on the side of the furnace body 6;

[0119] The rotating platform 9 is rotatably connected to the furnace body support seat 11; the rotating platform 9 is transmission-connected to the furnace body transmission device 10;

[0120] The upper end of the rotating platform 9 is fixedly connected to the lower end of the furnace body 6;

[0121] The furnace body support base 11 is fixedly connected to the bottom support base 12;

[0122] The bottom support seat 12 is fixedly installed on the equipment foundation;

[0123] The air inlet of the primary air supply duct 13 is installed above the middle of the concrete water tank 15 below the furnace body support seat 11, and the primary air supply duct 13 is connected to the furnace body 6;

[0124] The slag discharge device 14 is fixedly installed on the equipment foundation above the concrete water tank 15 and below the slag outlet at the bottom of the furnace body 6; the slag discharge device 14 controls the ash and slag at the slag outlet at the bottom of the furnace body 6 to fall into the concrete water tank 15 for cooling in an orderly manner through the hydraulic and connecting rod equipment in the device.

[0125] Preferably, the feed bin 1 is in the shape of a cuboid, and more preferably, the four inner corners are rounded and smooth.

[0126] Preferably, the double-roller feeding device 2 comprises two sets of servo motors 2-1, two sets of roller assemblies 2-2 and a rectangular parallelepiped bracket body 2-3;

[0127] The upper end of the bracket body 2-3 is fixedly connected to the lower discharge port of the feed bin 1, and the lower end is fixedly connected to the upper feed port of the upper cover 4;

[0128] The two groups of roller assemblies 2-2 are arranged in parallel and connected to the bracket body 2-3, and the two groups of servo motors 2-1 are respectively connected to the two groups of roller assemblies 2-2 in a transmission manner;

[0129] The two groups of roller assemblies 2-2 feed materials when they both rotate inwards, with the rotation direction of one group of rollers being opposite to that of the other group of rollers.

[0130] The front and rear sides of the two groups of roller assemblies 2-2 are designed with detachable flange connections with threaded fastening connection, which are respectively installed on the front and rear sides of the bracket body 2-3. The left and right sides are also designed with detachable flange connection large cover plates 2-5 with threaded fastening connection, which are respectively installed on the left and right sides of the bracket body 2-3.

[0131] After adopting the above structure, when the larger volume of materials in the feed bin is blocked and causes the two groups of roller assemblies 2-2 to malfunction, the small cover plate 2-4 and the large cover plate 2-5 can be used as inspection holes, and at least one of the cover plates can be opened to remove the blockage, and the double-roller feeding device 2 can be inspected without stopping the furnace. The structure is simple and the operation is convenient.

[0132] Preferably, it includes a scraper 7-1, a positive rotation active grate 7-2, a first positive rotation driven grate 7-3, a second positive rotation driven grate 7-4, a third positive rotation driven grate 7-5, a grate cap 7-6, an active sleeve shaft 7-7, an upper bearing bush 7-8, a fixed mandrel 7-10, a lower bearing bush 7-11, a thrust bearing 7-12, an upper shaft cover 7-9, a lower shaft cover 7-13 and a wind chamber 7-14;

[0133] The forward active grate 7-2, the first forward driven grate 7-3, the second forward driven grate 7-4, and the third forward driven grate 7-5 are all provided with slag discharge holes; the slag discharge holes are communicated with the wind chamber 7-14; and the forward active grate 7-2, the first forward driven grate 7-3, the second forward driven grate 7-4, and the third forward driven grate 7-5 are all annular gratings, and scrapers 7-1 are fixed at the radial edges; the multiple layers of annular gratings are stacked in a tower shape, and the central axis of each layer of annular gratings is eccentrically arranged with respect to the rotation axis of the fixed mandrel 7-10 fixed at the bottom of the grate 5;

[0134] The air chamber 7-14 is located in the hollowed-out area below the solid castings of the forward active grate 7-2, the first forward driven grate 7-3, the second forward driven grate 7-4, and the third forward driven grate 7-5. It is a general term for each air chamber and is not a component. The primary air is led to each air chamber from the branch pipe at the bottom of the furnace body through the primary air supply duct 13.

[0135] The forward active grate 7-2, the first forward driven grate 7-3, the second forward driven grate 7-4, and the third forward driven grate 7-5 are all fixedly connected to the active sleeve shaft 7-7;

[0136] The forward active grate 7-2, the first forward driven grate 7-3, the second forward driven grate 7-4, and the third forward driven grate 7-5 are arranged in a step-by-step manner from bottom to top, and a distance is left between adjacent grates, and the radial direction becomes smaller and smaller;

[0137] The scraper 7-1 is fixed to the radial edge of each layer of the grate, welded perpendicular to the grate plane and with a certain cutting angle, and the scraper 7-1 is cast and formed by high temperature wear-resistant cast iron; 3 to 6 scrapers are evenly arranged on the edge of each layer of the grate, and when the solid and liquid slag mixture in the furnace is squeezed between the grate and the inner wall of the furnace body, the eccentrically rotating grate drives the scraper to cut or crush the slag mixture, and the slag mixture falls to the slag discharge hole or the next layer;

[0138] The conical grate cap 7-6 at the top of the grate assembly 7 is provided with through holes around it, and is fastened to the corresponding through holes of the third forward-rotating driven grate 7-5 by bolts;

[0139] The active sleeve shaft 7-7 is movably sleeved with the fixed core shaft 7-10;

[0140] The upper end of the active sleeve shaft 7-7 is fixed with an upper shaft cover 7-9 to prevent axial movement; the lower end of the active sleeve shaft 7-7 is sealed with a lower shaft cover 7-13;

[0141] The upper bearing bushing 7-8 and the lower bearing bushing 7-11 are connected to the upper and lower inner holes of the active sleeve shaft 7-7 by interference fit, and are connected to the fixed core shaft 7-10 by clearance fit to form upper and lower sliding bearing friction pairs; the bearing bushing material of the upper bearing bushing 7-8 and the lower bearing bushing 7-11 is made of wear-resistant ductile iron or bronze casting and then machined;

[0142] The fixed mandrels 7-10 are fixedly connected to the furnace support seat 11;

[0143] A thrust bearing 7-12 is also provided between the root of the fixed mandrel 7-10 fixed at the bottom of the furnace body support seat 11 and the lower end of the active sleeve shaft 7-7, and the fixed mandrel 7-10 and the active sleeve shaft 7-7 are rotatably connected through the thrust bearing;

[0144] Preferably, the grate transmission device 8 includes a large bevel gear 8-1, a small bevel gear 8-2, a grate variable frequency motor 8-3 and a grate reduction device 8-4;

[0145] The grate frequency conversion motor 8-3 is connected to the small bevel gear 5-10 through the grate reduction device 8-4;

[0146] The small bevel gear 8-2 is located in the furnace body 6 and is meshedly connected with the large bevel gear 8-1;

[0147] The large bevel gear 8-1 is fixedly connected to the lower end surface of the forward-rotating active grate 7-2.

[0148] Preferably, the furnace body transmission device 10 includes a furnace body pinion 10-1, a furnace body outer gear ring 10-2, a furnace body speed reduction device 10-3 and a furnace body variable frequency motor 10-4;

[0149] The upper end surface of the outer gear ring 10-2 of the furnace body is fixedly connected to the lower end surface of the rotating platform 9;

[0150] The inner hole of the furnace body outer gear ring 10-2 is rotatably connected to the furnace body support seat 11 through a cylindrical roller bearing;

[0151] The furnace body variable frequency motor 10-4 is fixedly mounted on the furnace body support seat 11;

[0152] The furnace body variable frequency motor 10-4 is directly connected to the furnace body pinion 10-1 through the furnace body speed reducer 10-3;

[0153] The furnace body pinion 10 - 1 is meshedly connected with the furnace body outer gear ring 10 - 2 , and the furnace body pinion 10 - 1 is located at the lower side of the furnace body outer gear ring 10 - 2 .

[0154] Preferably, the slag discharge device 14 includes a slag discharge trough 14-1, a slag discharge scraper 14-2, a slag discharge swing arm articulated cylinder 14-3, a front arm articulated cylinder 14-4, a rear arm articulated cylinder 14-5, a rear arm 14-6, a front arm 14-7, a first scraper 14-8 and a support 14-9;

[0155] The support 14-9 of the slag discharge device 14 is installed on the equipment foundation of the concrete water tank 15; the concrete water tank 15 is located on the equipment foundation directly below the bottom support seat 12, forming a U-shaped slag falling channel;

[0156] The cylinder body of the forearm articulated oil cylinder 14-4 is hinged on the front end of the support 14-9; the forearm articulated oil cylinder 14-4 is symmetrically arranged on both sides of the support 14-9;

[0157] The cylinder body of the rear arm articulation oil cylinder 14-5 is articulated on the rear arm 14-6 and is symmetrically arranged on the rear arm 14-6 near the end side of the main supporting connecting rod;

[0158] The first scraper 14-8 is welded and connected to the forearm 14-7 after being positioned with a fixing pin;

[0159] The front arm 14-7, the rear arm 14-6, and the slag scraper 14-8 are sequentially connected to form a connecting rod mechanism, so as to realize a complete set of slag discharge combined cycle actions such as pushing the cooled ash falling from the bottom of the furnace body 6 to the concrete water tank 15 to the slag discharge tank 14-1 and lifting and resetting the first scraper fixed on the joint surface of the front arm 14-7 and the concrete water tank 15;

[0160] The slag discharge chute 14-1 is fixed on the rear end of the support 14-9;

[0161] The cylinder body of the slag unloading swing arm hinged oil cylinder 14-2 is hinged on the rear end of the support 14-9;

[0162] The slag scraper 14-2 is driven by the slag swing arm hinged cylinder 14-3, so as to realize the back and forth ash swinging action so that the ash is discharged through the slag chute 14-1.

[0163] The present invention realizes the single action and action combination of forward and backward, up and down, and pushing and unloading slag by driving the corresponding front arm articulated oil cylinder 14-4, rear arm articulated oil cylinder 14-5, and slag unloading swing arm articulated oil cylinder 14-3.

[0164] The first scraper 14-8 and the slag scraper 14-2 welded and fixed on the forearm 14-7 are made of wear-resistant steel plates after casting and processing, ensuring scratch resistance and durability;

[0165] The slag scraper 14-2 is driven by the slag swing arm hinged cylinder 14-3, so as to realize the back and forth ash swinging action so that the ash is discharged through the slag chute 14-1;

[0166] The second scraper 14-8 and the front arm 14-7 are in the slag discharge position during the process in which the rear arm 14-6 is transferred from the slag discharge lower position of the slag discharge port 6-3 at the bottom of the furnace body to the slag discharge upper position of the slag discharge trough 14-1;

[0167] The second scraper 14-8 and the front arm 14-7 are in the non-slag discharge position during the process in which the rear arm 14-6 is transferred from the slag discharge upper position of the slag discharge chute 14-1 to the slag discharge lower position of the slag drop port 6-3.

[0168] Preferably, Figure 3 As shown, the water seal device (i.e., flue gas sealing device) 6-1 is a water seal structure labyrinth seal formed by the upper cover 4, the lower end of the furnace cover seat 5 and the upper end of the furnace body 6, which form three layers of 10-30mm wide annular water seal grooves 6-1.1 (a, b, c from the inside to the outside) and two 40-60mm separation rings 6-1.2; when the flue gas (steam) in the furnace body leaks from the furnace cover seat and the water seal groove at the upper end of the furnace body with dust particles, the labyrinth channel makes it difficult for the flue gas (steam) to diffuse out of the furnace body, thus playing a good sealing role;

[0169] The upper ends of the two separation rings 6-1.2 are provided with a suitable number of second through holes 6-1.3 to connect the three annular water seal grooves 6-1.1 to ensure the relative balance of the pressure on the end faces of the labyrinth seals;

[0170] The bottom plates of the outer and inner annular water seal grooves 6-1.1 are both provided with drainage ports 6-1.4 (also called drain ports), and the bottom plate of the middle annular water tank 6-1.1 is connected with a drain port 6-1.5, and the drainage of sewage and wastewater is achieved through the valves on the drainage ports 6-1.4 and 6-1.5 connecting pipes;

[0171] The furnace cover seat 5 is also provided with a bottom plate 5-1 whose lower end passes through the furnace cover seat 5, and the bottom plate 5-1 is provided with a first through hole 5-2 corresponding to the annular water tank and a water inlet pipe for the annular water tank to enter water; cooling water enters the cooling water cavity of each layer from the water inlet pipe of the first through hole 5-2 of the furnace cover seat 5 to cool the furnace cover seat 5 and the furnace body 6, and the water vapor formed after heating is discharged from the pipe connected to the steam discharge port of the furnace cover seat 5 to take away the heat.

[0172] Preferably, the furnace construction engineering of the upper flue 3, the upper cover 4, the furnace cover seat 5, and the furnace body 6 in the present invention;

[0173] The feed bin 1, the lower entrance of the double-roller feeding device 2, and the entire exit of the upper flue 3 are all provided with at least one circle of suitable refractory layer, and the refractory layer is made of silicon carbide bricks or castables, which are high-temperature wear-resistant and corrosion-resistant SiC particle-reinforced aluminum-based composite materials SiC-40-85. Refractory bricks can play a role in heat insulation, thereby reducing the temperature of the outer wall of the furnace cover.

[0174] The upper part of the furnace body 6 includes a carbon steel layer, a thermal insulation material layer, a leveling layer, and a refractory material layer from the outside to the inside; the thermal insulation material layer adopts high-temperature resistant aluminum silicate and ceramic fiber materials; the refractory material layer adopts a high-aluminum-based composite material Al-60~85 that is resistant to high temperature, wear and corrosion; the refractory material layer can play a role in thermal insulation, thereby controlling the radiant heat temperature of the outer wall of the furnace body and reducing the surface temperature of the outer wall.

[0175] The middle and lower parts of the furnace body 6 are water-cooled jacket structures, cold water of desalted water enters, and water vapor is discharged through the exhaust port 6-2 connected to the pipeline, and drain and sewage outlets are provided.

[0176] In the present invention, except that the furnace cover seat 5 component (including the parts fixed thereon) and the furnace body support seat 11 component (including the parts fixed thereon) are fixed and stationary structures, the furnace body transmission device 10 drives the furnace body 6 component (including the parts fixed thereon) to rotate concentrically outside, and the grate transmission device 8 drives the grate assembly 7 to rotate eccentrically inside. The structural features and relationships of each component are described as follows:

[0177] ① Feed bin 1 is an upright box-type structure. It is not only the passage for the crushed garbage to enter the furnace from the lower hopper, but also a place for temporary storage of garbage. During operation, the garbage loaded into the bin occupies more than 1 / 2 of the entire bin height, which can prevent the smoke in the furnace from overflowing from the bin and ensure the stability of the negative pressure in the furnace.

[0178] ② The double-roller feeding device 2 is installed at the lower part of the silo. Two sets of servo motors drive two sets of roller assemblies to rotate slowly, so that the crushed and dried garbage in the silo is continuously and evenly fed into the furnace.

[0179] ③ The labyrinth sealing structure of the upper cover 4, the lower end of the furnace cover seat 5 and the upper end of the furnace body 6 is provided with two layers of stainless steel water seal rings, the inner water seal blocks the flue gas in the furnace, and the outer water seal blocks the air outside the furnace.

[0180] ④ The furnace body 6 is a vertical cylindrical structure with a grooved water seal on the upper end surface, which is divided into three parts: upper, middle and lower (such as Figure 3 ), the upper part is the flue gas flow and garbage drying layer, the middle part is the pyrolysis gasification, oxidation combustion and reduction burnout layer, and the lower part is the slag cooling and slag discharge layer.

[0181] ⑤ Grate assembly 7 and grate transmission device 8. They are the core of the continuous and stable operation of the pyrolysis gasification furnace, and play the role of supporting materials, rotating slag removal and uniform air distribution. It is installed at the bottom of the lower end of the rotating furnace body 6. During operation, through slow rotation, the eccentric grate cap and the eccentric force of the grid plate squeeze the molten slag into a narrow place and are crushed by the extrusion with the lower inner wall of the furnace body. Under the blocking effect of the slag removal partition on the furnace body 6, it is discharged from the grate slag discharge hole or the gap between the grate plates and falls into the conical slag drop port below it.

[0182] ⑥ It consists of a cylindrical rotating platform 9, a furnace body 6 and a furnace body transmission device 10. The rotating platform 9 is an intermediate component connecting the furnace body 6 and the furnace body transmission device 10. The furnace body transmission device 10 is a large cylindrical roller bearing structure with large bearing force and stable rotation, which drives the furnace body and the rotating platform to rotate slowly, so that the garbage falling into the furnace from the drop port fixed on the upper cover can be evenly spread to maintain the relative stability of the combustion condition in the furnace.

[0183] ⑦ The slag outlet 6-3 at the bottom of the furnace body, the slag discharge device 14 and the concrete water tank 15 constitute the slag discharge and slag discharge system of the furnace body device. The conical slag outlet at the bottom of the furnace body 6 is inserted into the concrete water tank 15 to form a water seal, and the primary air supply duct 13 penetrates the wind chamber under the grate from the center of the conical slag outlet. The cooled slag falls into the water from the gap between the conical slag outlet and the primary air supply duct 13, settles to the bottom of the concrete water tank 15, is discharged by the slag discharge device 14, and then transported or recycled for secondary use. No dust is generated at the work site, truly realizing clean production.

[0184] The main working process and combustion characteristics of the high-efficiency domestic waste pyrolysis gasification furnace system of the present invention (such as Figure 3 ) yes:

[0185] Solid waste such as domestic garbage that has undergone primary selection, crushing and fermentation (referred to as "solid waste") is put into the feed port and fed evenly through the speed control of the double-roll feeding device. It enters the upper part of the furnace body and is dried, dispersed, dehydrated and volatilized quickly under the drying of the rising hot flue gas flow. Due to the rotation of the furnace body, these solid wastes fall evenly on the grate layers in the middle of the furnace body and burn. Under the action of the hot air flow and radiant heat, they quickly volatilize and heat up. After the organic matter in the solid waste is heated to the pyrolysis temperature, it is first thermally decomposed in an oxygen-deficient state. Part of the thermal decomposition gas burns when it meets oxygen, and the unburned gas is discharged from the upper flue outlet into the secondary combustion chamber or the gas secondary utilization device.

[0186] With the continuous input of solid waste such as garbage, the remaining part after thermal decomposition will form a large amount of high-temperature charcoal residue, and in the process of moving downward, it will react violently with the oxygen in the air sent from the primary air supply duct at the bottom of the furnace body, releasing a large amount of heat to supply the garbage just entering the furnace for drying, dehydration, and heating and thermal decomposition; the high-temperature residue after burning out moves downward and falls with the slow eccentric rotation of the grate. The air supply device sends the combustion-supporting air into the wind chamber under the grate through the pipeline, and under the action of pressure, it enters from the slag discharge hole of the grate or the gap between the grid plates, absorbs the residual heat of the residue to become high-temperature combustion-supporting air, and then enters the furnace body for the combustion of residual char and part of the pyrolysis gas. As the cold air continues to enter, the residue is gradually cooled down. After the initial cooling, the residue is crushed and broken under the centrifugal force and eccentric extrusion force of the internally rotating annular grid. It is squeezed out from the slag discharge hole or the gap between the grids and falls into the ash hopper to the water-sealed slag trough. The slag is then scraped out of the water trough by the slag discharge device to complete the slag discharge.

[0187] The present invention shows and describes the basic principles, main features and advantages of the device of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A high-efficiency domestic waste pyrolysis gasification furnace system, characterized by: It comprises a feed bin (1), a double-roller feeding device (2), an upper flue (3), an upper cover (4), a furnace cover seat (5), a furnace body (6), a grate assembly (7), a grate transmission device (8), a rotating platform (9), a furnace body transmission device (10), a furnace body support seat (11), a bottom support seat (12), a primary air supply duct (13), a slag discharge device (14) and a concrete water tank (15); A double-roller feeding device (2) is installed at the lower part of the feed bin (1) at the upper end of the upper cover (4); The discharge port of the double-roller feeding device (2) is connected to the discharge port of the upper cover (4); The inlet of the upper flue (3) is connected to the flue outlet of the upper cover (4); The upper cover (4) is fastened to the furnace cover seat (5), and the furnace cover seat (5) is fixedly installed on the equipment foundation; The upper end of the furnace body (6) with a water seal structure is rotatably connected to the lower end of the furnace cover seat (5); The grate assembly (7) is rotatably connected to a core shaft at the bottom of a furnace body support seat (11) inside the furnace body (6); the grate assembly (7) is drivingly connected to a grate transmission device (8); The grate transmission device (8) is fixedly mounted on the side of the furnace body (6); The rotating platform (9) is rotatably connected to the furnace body support seat (11); the rotating platform (9) is transmission-connected to the furnace body transmission device (10); The upper end of the rotating platform (9) is fixedly connected to the lower end of the furnace body (6); The furnace body support seat (11) is fixedly connected to the bottom support seat (12); The bottom support seat (12) is fixedly mounted on the equipment foundation; The air inlet of the primary air supply duct (13) is installed above the middle of the concrete water tank (15) below the furnace body support seat (11), and the primary air supply duct (13) is connected to the furnace body (6); The slag discharge device (14) is fixedly installed on the equipment foundation above the concrete water tank (15) and below the slag discharge port at the bottom of the furnace body (6); The grate assembly (7) comprises a scraper (7-1), a forward-rotating active grate (7-2), a first forward-rotating driven grate (7-3), a second forward-rotating driven grate (7-4), a third forward-rotating driven grate (7-5), a grate cap (7-6), an active sleeve shaft (7-7), an upper bearing bush (7-8), a fixed mandrel (7-10), a lower bearing bush (7-11), a thrust bearing (7-12), an upper shaft cover (7-9), a lower shaft cover (7-13) and a wind chamber (7-14); The forward active grate (7-2), the first forward driven grate (7-3), the second forward driven grate (7-4), and the third forward driven grate (7-5) are all provided with slag discharge holes; the slag discharge holes are communicated with the wind chamber (7-14); and the forward active grate (7-2), the first forward driven grate (7-3), the second forward driven grate (7-4), and the third forward driven grate (7-5) are all annular gratings, and scrapers (7-1) are fixed at the radial edges; the multiple layers of annular gratings are stacked in a tower shape, and the central axis of each layer of annular gratings is eccentrically arranged with respect to the rotation axis of a fixed core shaft (7-10) fixed at the bottom of the grate (5); The wind chamber (7-14) is located in the hollowed-out area below the solid castings of the forward-rotating active grate (7-2), the first forward-rotating driven grate (7-3), the second forward-rotating driven grate (7-4), and the third forward-rotating driven grate (7-5); primary air is led to each wind chamber through a primary air supply duct (13) from a branch pipe at the bottom of the furnace body; The forward-rotating active grate (7-2), the first forward-rotating driven grate (7-3), the second forward-rotating driven grate (7-4), and the third forward-rotating driven grate (7-5) are all fixedly connected to the active sleeve shaft (7-7); The forward-rotating active grate (7-2), the first forward-rotating driven grate (7-3), the second forward-rotating driven grate (7-4), and the third forward-rotating driven grate (7-5) are arranged in a step-like manner from bottom to top, with a distance between adjacent grates, and the radial distances are getting smaller and smaller; The conical-hat-shaped grate cap (7-6) at the top of the grate assembly (7) is provided with through holes around its periphery and is fastened to the corresponding through holes of the third forward-rotating driven grate (7-5) by bolts; The active sleeve shaft (7-7) is movably sleeved with the fixed core shaft (7-10); The upper end of the active sleeve shaft (7-7) is fixed with an upper shaft cover (7-9) to the upper bearing bush (7-8) to prevent axial movement; the lower end of the active sleeve shaft (7-7) is sealed with a lower shaft cover (7-13); The upper bearing shell (7-8) and the lower bearing shell (7-11) are connected to the upper and lower inner holes of the active sleeve shaft (7-7) by interference fit, and are connected to the fixed core shaft (7-10) by clearance fit to form upper and lower sliding bearing friction pairs; The fixed core shaft (7-10) is fixedly connected to the furnace body support seat (11); A thrust bearing (7-12) is also provided between the root of a fixed core shaft (7-10) fixed at the bottom of the furnace body support seat (11) and the lower end of the active sleeve shaft (7-7), and a rotational connection between the fixed core shaft (7-10) and the active sleeve shaft (7-7) is achieved through the thrust bearing; The grate transmission device (8) comprises a large bevel gear (8-1), a small bevel gear (8-2), a grate variable frequency motor (8-3) and a grate speed reducer (8-4); The grate variable frequency motor (8-3) is connected to the small bevel gear (8-2) via a grate speed reducer (8-4); The small bevel gear (8-2) is located in the furnace body (6) and is meshedly connected with the large bevel gear (8-1); The large bevel gear (8-1) is fixedly connected to the lower end surface of the forward-rotating active grate (7-2); The furnace body transmission device (10) comprises a furnace body pinion (10-1), a furnace body outer gear ring (10-2), a furnace body speed reduction device (10-3) and a furnace body variable frequency motor (10-4); The upper end surface of the outer gear ring (10-2) of the furnace body is fixedly connected to the lower end surface of the rotating platform (9); The inner hole of the furnace body outer gear ring (10-2) is rotatably connected to the furnace body support seat (11) via a cylindrical roller bearing; The furnace body variable frequency motor (10-4) is fixedly mounted on the furnace body support seat (11); The furnace body variable frequency motor (10-4) is directly connected to the furnace body pinion (10-1) through a furnace body speed reduction device (10-3); The furnace body pinion (10-1) is connected to the furnace body outer gear ring (10-2) by gear meshing, and the furnace body pinion (10-1) is located at the lower side of the furnace body outer gear ring (10-2).

2. The high-efficiency domestic waste pyrolysis gasification furnace system according to claim 1 is characterized in that: The feed bin (1) is in the shape of a rectangular parallelepiped.

3. The high-efficiency domestic waste pyrolysis gasification furnace system according to claim 1 is characterized in that: The double-roller feeding device (2) comprises two groups of servo motors (2-1), two groups of roller assemblies (2-2) and a rectangular parallelepiped bracket body (2-3); The upper end of the bracket body (2-3) is fixedly connected to the lower discharge port of the feed bin (1), and the lower end is fixedly connected to the upper feed port of the upper cover (4); The two groups of roller assemblies (2-2) are arranged in parallel and connected to the bracket body (2-3), and the two groups of servo motors (2-1) are respectively connected to the two groups of roller assemblies (2-2) in a transmission manner; The two groups of roller assemblies (2-2) feed materials while rotating inwards, with the rotation direction of one group of rollers being opposite to that of the other group of rollers.

4. The high-efficiency domestic waste pyrolysis gasification furnace system according to claim 1 is characterized in that: The slag discharge device (14) comprises a slag discharge chute (14-1), a slag discharge scraper (14-2), a slag discharge swing arm articulated oil cylinder (14-3), a front arm articulated oil cylinder (14-4), a rear arm articulated oil cylinder (14-5), a rear arm (14-6), a front arm (14-7), a first scraper (14-8) and a support (14-9); The support (14-9) of the slag discharge device (14) is installed on the equipment foundation of the concrete water tank (15); The cylinder body of the forearm articulated oil cylinder (14-4) is hinged on the front end of the support (14-9); the forearm articulated oil cylinder (14-4) is symmetrically arranged on both sides of the support (14-9); The cylinder body of the rear arm articulation oil cylinder (14-5) is articulated on the rear arm (14-6) and is symmetrically arranged on the rear arm (14-6) near the end side of the main support connecting rod; The first scraper (14-8) is welded and connected to the fixing pin of the forearm (14-7) after being positioned; The front arm (14-7), the rear arm (14-6), and the slag scraper (14-2) are sequentially connected to form a connecting rod mechanism; The slag discharge chute (14-1) is fixed on the rear end of the support (14-9); The cylinder body of the slag unloading swing arm hinged oil cylinder (14-3) is hinged on the rear end of the support (14-9); The slag-discharging scraper (14-2) is driven by a slag-discharging swing arm hinged oil cylinder (14-3).

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