CN115307152B - Method for disposing solid waste by using tertiary air - Google Patents

Abstract

The present invention discloses a method for disposing solid waste by using tertiary air, and the method comprises the following steps: garbage and tertiary air enter, adjust the usage of tertiary air, introduce raw materials, set sealing device and garbage ash decomposition: Step A. Garbage and tertiary air enter: solid waste and tertiary air enter from one side of rotating tertiary air, driven by the rotating motion of the transmission device, the waste gas and ash after the garbage calcination enter the decomposition furnace, and the variable speed transmission device is designed to flexibly adjust the residence time of the material in the tertiary air duct. The method for disposing solid waste by using tertiary air utilizes the high temperature tertiary air of cement production to realize the rapid drying and ignition of the solid waste fed into the dynamic tertiary air duct, and realizes stable combustion, wherein the waste gas generated enters the decomposition furnace for continuous combustion and decomposition, and the ash generated enters the decomposition furnace and then enters the rotary kiln for continuous calcination and solidification.

Description

A method for disposing solid waste using tertiary air

Technical Field

The invention relates to the field of solid waste treatment, and in particular to a method for treating solid waste using tertiary air.

Background Art

When using industrial kilns to incinerate solid waste and domestic garbage, in order to solve the problem of unstable combustion of such multi-phase solid waste, there are usually binding requirements on the calorific value of the materials entering the furnace, and targeted equipment structure development is required for the drying, ignition, combustion, and burnout areas to ensure the incineration treatment effect; the solid waste incineration disposal devices commonly used in the cement industry are mainly of the following types:

1) Mechanical biological method: The combustible components in the solid waste are dehydrated and sorted by mechanical biological method, and then enriched to prepare RDF. Part of the slag produced by RDF combustion is used as a substitute for raw materials, and part of the sorted residue is landfilled.

2) Pyrolysis furnace technology: After simple dehydration and coarse crushing, the solid waste is fed into the pyrolysis gasification furnace through a sealed feeding device. A fluidized quartz sand layer is laid in the pyrolysis gasification furnace. After the solid waste enters the furnace, it is heated, dried, gasified, and heat transferred in the fluidized quartz sand layer. The combustible matter of the solid waste is converted into combustible flue gas through pyrolysis and enters the decomposition furnace.

3) Hot plate furnace technology: After simple dehydration and coarse crushing, the solid waste is sent to the hot plate furnace for incineration. There is a rotating furnace plate at the bottom of the hot plate furnace, and refractory materials are configured inside.

4) Step furnace technology: The tertiary air area entering the furnace is remodeled, and a step furnace with an inclination angle of 12 to 15 degrees is implanted at the bottom of the decomposition furnace. Part or all of the tertiary air of the furnace body passes through the step furnace, and the solid waste is fed into the step furnace through a sealed feeder.

5) Grate furnace technology: After simple dehydration, the solid waste is sent to the grate furnace for incineration.

As shown in Figure 1 of the specification: the technical characteristics and existing problems of the above-mentioned different combustion technology routes are mainly reflected in the following aspects:

1) Mechanical biological method: RDF particle size and moisture directly affect the combustion process of solid waste in the decomposition furnace, and the deflagration phenomenon affects the stability of the decomposition furnace; the waste stays in the furnace for a short time, and some large particles or difficult-to-burn materials are disposed of with post-combustion, which is prone to incomplete combustion.

2) Gasification furnace technology: The thermal quality of the gasified flue gas in the gasifier is not high, and the thermal conversion efficiency entering the decomposition furnace is low, about 30%; the quality of solid waste has a great influence on the pyrolysis process, and necessary supplementary combustion measures need to be configured.

3) Hot plate furnace technology: The hot plate furnace is implanted in the cone part of the decomposition furnace, which has an adverse effect on the effective volume of the decomposition furnace and the stable control of the flow field, destroying the balance of the original burning system. Solid waste with high moisture content can only be burned on the surface of the furnace plate in a fixed bed in the hot plate furnace, and the burnout rate of the scraper entering the furnace is low.

4) Step furnace technology: The residence time of the material strictly depends on the frequency of grate movement at the bottom or the frequency of compressed air purge.

5) Grate furnace technology: This technology uses cold air as combustion-supporting air and water quenching to remove slag, and introduces heat dissipation into the thermal pipeline of the decomposition furnace, which reduces the thermal utilization efficiency of the system.

In view of this, an in-depth study was conducted on the above-mentioned issues, which led to the present case.

Summary of the invention

In order to fill the gap in the market, the present invention provides a method for disposing solid waste using tertiary air.

The object of the present invention is to provide a method for disposing solid waste using tertiary air to solve the problems raised in the above-mentioned background technology.

To achieve the above object, the present invention provides the following technical solution: a method for treating solid waste using tertiary air, the treatment method comprising the following steps: introducing garbage and tertiary air, adjusting the usage of tertiary air, introducing raw materials, setting a sealing device and decomposing garbage ash:

Step A. Garbage and tertiary air inlet: solid waste and tertiary air enter from one side of the rotating tertiary air duct. Driven by the rotating motion of the transmission device, the waste gas and ash after the garbage calcination enter the decomposition furnace. The variable speed transmission device is designed to flexibly adjust the residence time of the material in the tertiary air duct;

Step B. Adjust the usage of tertiary air: Use the gate to control the usage of tertiary air in the rotary furnace to ensure that 20% to 80% of the tertiary air can be distributed to the furnace to provide oxygen for waste incineration and make the system combustion atmosphere an oxygen-rich atmosphere;

Step C. Introducing raw materials: The stable combustion of solid waste will release a large amount of heat. In order to ensure the safety of the equipment and protect the refractory materials, a part of the raw materials is introduced into the dynamic tertiary branch pipe in the design, and the coupling balance between the heat absorption of raw material carbonate decomposition and the heat release of solid waste combustion is used to control the temperature in the pipe;

Step D. Set up sealing device: Because the dynamic tertiary air duct is a rotating component, the system operates at negative pressure, and there are high-temperature gases and materials, special sealing devices are set at both ends to reduce air leakage and ensure combustion conditions;

Step E. Garbage ash decomposition: The garbage ash after combustion in the dynamic tertiary air duct enters the decomposition furnace from the newly added unloading slope, reducing the impact on the original system of the decomposition furnace, ensuring that the material enters the furnace smoothly and enters the rotary kiln to complete calcination.

Furthermore, step A includes a furnace body, characterized in that: the bottom of the furnace body is welded and fixed to the smoke chamber, and a coal powder inlet pipe is installed on the upper right side of the furnace body, and a dynamic tertiary air duct is installed at the bottom of the coal powder inlet pipe, and the bottom of the dynamic tertiary air duct is supported by an inclination adjustment device, and the bottom of the inclination adjustment device is fixed by a support frame, and the support frame is installed on a base, a static tertiary air duct is installed at one end of the dynamic tertiary air duct away from the furnace body, and the left side of the static tertiary air duct is limitedly supported by a support frame, and the bottom of the static tertiary air duct is connected to the decomposition furnace.

Furthermore, the dynamic tertiary air duct includes a rotary kiln, a furnace outlet pipe, a first movable connecting ring, a left elastic connecting cloth bag, a sealing structure, an annular bearing, a raw material inlet, a sealing door, a right elastic connecting cloth bag, a static air duct inlet pipe, a second movable connecting ring and a carrier plate, and the end of the furnace outlet pipe is welded and fixed to the furnace body outlet, and the end of the static air duct inlet pipe is welded and fixed to the inlet of the static tertiary air duct.

Furthermore, sealing structures are screwed and installed at both ends of the rotary kiln, and the two ends of the rotary kiln are screwed and fixed to the left elastic connecting cloth bag and the right elastic connecting cloth bag respectively through the sealing structure, and at the same time, the end of the left elastic connecting cloth bag away from the sealing structure is screwed and fixed to the first movable connecting ring, and the end of the right elastic connecting cloth bag away from the sealing structure is screwed and fixed to the second movable connecting ring.

Furthermore, the furnace outlet pipe and the first movable connecting ring are formed into a concentric circle structure, and the furnace outlet pipe and the first movable connecting ring are movably connected via a sealed bearing; the static air duct inlet pipe and the second movable connecting ring are formed into a concentric circle structure, and the static air duct inlet pipe and the second movable connecting ring are movably connected via a sealed bearing.

Furthermore, a raw material inlet is provided on the upper surface of the rotary kiln, and a sealing door is movably installed on the upper side of the raw material inlet through a hinge, and the end of the sealing door is fixed to the surface of the rotary kiln by bolt connection.

Furthermore, the inclination adjustment device includes a support plate, a fixed block, a mounting plate, a transmission rod, a movable seat, a screw, a drive motor, a limit block and a limit column, and a screw is movably installed on the surface of the mounting plate, the screw is screwed in a screw hole opened inside the movable seat, and the end of the screw is fixed to the output shaft of the drive motor through a coupling.

Furthermore, both ends of the movable seat are welded with limiting blocks, and limiting columns are inserted into limiting holes inside the limiting blocks. The limiting columns are arranged in two groups and are installed on the upper surface of the mounting plate through a fixing plate.

Furthermore, two sets of transmission rods are hingedly installed on the surface of the movable seat, and one end of the transmission rod away from the movable seat is hinged to the bottom of the carrier plate, a support plate is welded to the lower right side of the bottom of the carrier plate, and the bottom of the support plate is hinged to the fixed block.

Compared with the prior art, the beneficial effects of the present invention are: utilizing the high-temperature tertiary air of cement production to achieve rapid drying and ignition of the solid waste fed into the dynamic tertiary air duct, thereby achieving stable combustion, wherein the waste gas generated enters the decomposition furnace for continued combustion and decomposition, and the generated ash enters the decomposition furnace and then enters the rotary kiln for continuous calcination and solidification; compared with various existing solid waste disposal devices, such as gasification furnaces, mechanical biological methods, hot plate furnaces, stepped furnaces, grate furnaces, etc., the present invention has the unique advantages of relatively simple system, small footprint, less investment, stable and reliable operation, low operating costs, strong adaptability to solid waste, and high burnout rate.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a diagram of a prior art solid waste treatment process mentioned in the background technology;

FIG2 is a solid waste treatment process diagram of the structure of the present invention;

FIG3 is a schematic diagram of the dynamic tertiary air duct installation structure of the present invention;

FIG4 is a schematic diagram of a dynamic tertiary air duct and an inclination adjustment device of the structure of the present invention;

FIG5 is a top view of the mounting plate of the structure of the present invention;

FIG6 is a schematic cross-sectional view of a rotary kiln according to the present invention.

In the figure: 1. furnace body; 2. smoke chamber; 3. base; 4. support frame; 5. coal powder inlet pipe; 6. dynamic tertiary air duct; 60. rotary kiln; 61. furnace outlet pipe; 62. first movable connecting ring; 63. elastic connecting cloth bag on the left; 64. sealing structure; 65. annular bearing; 66. raw material inlet; 67. sealing door; 68. elastic connecting cloth bag on the right; 69. static air duct inlet pipe; 70. second movable connecting ring; 71. carrier plate; 7. support frame; 8. inclination adjustment device; 81. support plate; 82. fixing block; 83. mounting plate; 84. transmission rod; 85. movable seat; 86. screw rod; 87. driving motor; 88. limit block; 89. limit column; 9. static tertiary air duct; 10. into the decomposition furnace.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

Specific implementation method 1: Please refer to Figures 1-6. The present invention provides a technical solution: a method for disposing solid waste using tertiary air, the disposal method includes the following steps: garbage and tertiary air intake, adjusting the usage of tertiary air, introducing raw materials, setting a sealing device and garbage ash decomposition:

Step A. Garbage and tertiary air enter: solid waste and tertiary air enter from one side of the rotating tertiary air duct. Driven by the rotating motion of the transmission device, the waste gas and ash after the garbage calcination enter the decomposition furnace 10. The variable speed transmission device is designed to flexibly adjust the residence time of the material in the tertiary air duct;

Step B. Adjust the usage of tertiary air: Use the gate to control the usage of tertiary air in the rotary furnace to ensure that 20% to 80% of the tertiary air can be distributed to the furnace to provide oxygen for waste incineration and make the system combustion atmosphere an oxygen-rich atmosphere;

Step C. Introducing raw materials: The stable combustion of solid waste will release a large amount of heat. In order to ensure the safety of the equipment and protect the refractory materials, a part of the raw materials is introduced into the dynamic tertiary branch pipe in the design, and the coupling balance between the heat absorption of raw material carbonate decomposition and the heat release of solid waste combustion is used to control the temperature in the pipe;

Step D. Setting a sealing device: Since the dynamic tertiary air duct 6 is a rotating component, the system operates at negative pressure and there are high-temperature gases and materials, special sealing devices are set at both ends to reduce air leakage and ensure combustion conditions;

Step E. Garbage ash decomposition: The garbage ash after combustion in the dynamic tertiary air duct 6 enters the decomposition furnace 10 from the additional unloading slope, reducing the impact on the original system of the decomposition furnace 10, ensuring that the material enters the furnace smoothly and enters the rotary kiln to complete calcination.

Working principle: When in use, a dynamic tertiary air duct 6 is installed at the bottom of the furnace body 1 of the decomposition furnace of the current large-scale cement clinker burning system, and the high-temperature tertiary air of cement production is used to quickly dry and ignite the solid waste garbage fed into the dynamic tertiary air duct 6 to achieve stable combustion. The waste gas generated enters the decomposition furnace 10 to continue to burn and decompose, and the ash generated enters the decomposition furnace 10 and then enters the rotary kiln 60 for continuous calcination and solidification. Compared with various existing solid waste disposal devices, such as gasification furnaces, mechanical biological methods, hot plate furnaces, step furnaces, grate furnaces, etc., it has the unique advantages of relatively simple system, small footprint, less investment, stable and reliable operation, low operating costs, strong adaptability to solid waste, and high burnout rate.

Specific embodiment 2: This embodiment is a further limitation of specific embodiment 1, and step A includes a furnace body 1, which is characterized in that: the bottom of the furnace body 1 is welded and fixed to the smoke chamber 2, and a coal powder inlet pipe 5 is installed on the upper right side of the furnace body 1, and a dynamic tertiary air duct 6 is installed at the bottom of the coal powder inlet pipe 5, and the bottom of the dynamic tertiary air duct 6 is supported by an inclination adjustment device 8, and the bottom of the inclination adjustment device 8 is fixed by a support frame 4, and the support frame 4 is installed on the base 3, and a static tertiary air duct 9 is installed at one end of the dynamic tertiary air duct 6 away from the furnace body 1, and the left side of the static tertiary air duct 9 is limitedly supported by a support frame 7, and the bottom of the static tertiary air duct 9 is connected to the decomposition furnace 10.

As shown in Figure 2-6: The dynamic tertiary air duct 6 is set up, and the tertiary air duct in the cement clinker production process is transformed. A part of the tertiary air duct at the furnace inlet end is changed into an inclined and dynamically rotatable device: the dynamic tertiary air duct 6. At the same time, a solid waste feeding inlet is designed: the raw material inlet 66. Through the rotating equipment, the spiral tumbling process of the rotation process contacts with the high-temperature tertiary air, thereby realizing the physical and chemical processes of preheating, drying, decomposition, combustion and other physical and chemical processes of solid waste.

Specific embodiment three: This embodiment is a further limitation of specific embodiment two, and the dynamic tertiary air duct 6 includes a rotary kiln 60, a furnace outlet pipe 61, a first movable connecting ring 62, a left elastic connecting cloth bag 63, a sealing structure 64, an annular bearing 65, a raw material inlet 66, a sealing door 67, a right elastic connecting cloth bag 68, a static air duct inlet pipe 69, a second movable connecting ring 70 and a carrier plate 71, and the end of the furnace outlet pipe 61 is welded and fixed to the outlet of the furnace body 1, and the end of the static air duct inlet pipe 69 is welded and fixed to the inlet of the static tertiary air duct 9.

As shown in Figure 4: the rotation of the rotary kiln 60 is driven by a large gear and a driving gear fixed to the output of the driving motor. The wheel belts on both sides of the surface of the rotary kiln 60 are set on the supporting wheels to ensure the stability of the rotary kiln 60 when working; by applying high-temperature tertiary air to assist combustion, the combustion of calorific materials in solid waste forms a strong oxidizing atmosphere to ensure a higher degree of burnout of solid waste in the dynamic rotating tertiary air.

Specific embodiment four: This embodiment is a further limitation of specific embodiment three. Sealing structures 64 are screwed on both ends of the rotary kiln 60, and the two ends of the rotary kiln 60 are screwed and fixed to the left elastic connecting cloth bag 63 and the right elastic connecting cloth bag 68 through the sealing structure 64, respectively. At the same time, the end of the left elastic connecting cloth bag 63 away from the sealing structure 64 is screwed and fixed to the first movable connecting ring 62, and the end of the right elastic connecting cloth bag 68 away from the sealing structure 64 is screwed and fixed to the second movable connecting ring 70.

As shown in FIG4 , the two ends of the rotary kiln 60 are respectively screwed and fixed to the left elastic connecting cloth bag 63 and the right elastic connecting cloth bag 68 through a sealing structure 64. The setting of the left elastic connecting cloth bag 63 and the right elastic connecting cloth bag 68 will not affect the rotary kiln 60 even if it is tilted. The outer sides of the first movable connecting ring 62 and the second movable connecting ring 70 are both provided with sealed bearings, which will not affect the rotation of the rotary kiln 60.

While the rotary kiln 60 is rotating, high-temperature tertiary air is introduced into the interior thereof; the high-temperature tertiary air of cement production is occupied by the dynamic rotating tertiary air, and the high temperature and high thermal enthalpy of the tertiary air are utilized to realize rapid drying, ignition, stable combustion and complete burnout of solid waste in the tube.

Specific embodiment five: This embodiment is a further limitation of specific embodiment three, the furnace outlet pipe 61 and the first movable connecting ring 62 are concentric circle structures, and the furnace outlet pipe 61 and the first movable connecting ring 62 are movably connected via a sealed bearing; the static air duct inlet pipe 69 and the second movable connecting ring 70 are concentric circle structures, and the static air duct inlet pipe 69 and the second movable connecting ring 70 are movably connected via a sealed bearing.

Under an oxidizing atmosphere, the temperature in the tertiary cyclone duct is stably controlled mainly by controlling the amount of raw material added, and the raw material is used to adjust the coke slag characteristics of the solid waste slag to achieve stable operation of the ash kiln.

Specific embodiment six: This embodiment is a further limitation of specific embodiment four. A raw material inlet 66 is provided on the upper surface of the rotary kiln 60, and a sealing door 67 is movably installed on the upper side of the raw material inlet 66 through a hinge. The end of the sealing door 67 is fixed to the surface of the rotary kiln 60 by bolt connection.

As shown in Figure 4: Both ends of the rotary kiln 60 are screwed with sealing structures 64. In connection with the original equipment, the static tertiary air duct 9, and the decomposition furnace 10, a fixed kiln head sealing device is arranged below the decomposition furnace 10. Unburned materials enter the furnace through an inclined feeding ramp, and an air cannon is provided to handle abnormal working conditions.

Specific embodiment seven: This embodiment is a further limitation of specific embodiment two, and the inclination adjustment device 8 includes a support plate 81, a fixed block 82, a mounting plate 83, a transmission rod 84, a movable seat 85, a screw 86, a drive motor 87, a limit block 88 and a limit column 89, and a screw 86 is movably mounted on the surface of the mounting plate 83, the screw 86 is screwed into a screw hole opened inside the movable seat 85, and the end of the screw 86 is fixed to the output shaft of the drive motor 87 through a coupling.

As shown in Figures 3-5: the working mode of the inclination adjustment device 8 is as follows: when the inclination of the rotary kiln 60 needs to be adjusted, the switch of the driving motor 87 is started, and the output shaft of the driving motor 87 drives the screw rod 86 to rotate, and the screw rod 86 is screwed and installed inside the movable seat 85. The movable seat 85 moves laterally to change the angle between the transmission rod 84 and the carrier plate 71, thereby realizing the inclination adjustment of the rotary kiln 60. By setting the inclination of the rotary kiln 60, the residence time of the material inside the rotary kiln 60 can be controlled.

Specific embodiment eight: This embodiment is a further limitation of specific embodiment seven. Limiting blocks 88 are welded at both ends of the movable seat 85, and limiting columns 89 are inserted into the limiting holes inside the limiting blocks 88. The limiting columns 89 are arranged in two groups and are installed on the upper surface of the mounting plate 83 through a fixing plate.

A gradient difference and a lifting refractory brick device are configured in the rotating tertiary air duct to strengthen the gas-solid mixing and combustion of solid waste in the tertiary air, effectively strengthen the combustion process, and significantly improve the coupling balance between the heat absorption of raw material carbonate decomposition and the heat release of solid waste combustible combustion, thus stabilizing the combustion in the tertiary air.

Due to the gradient difference in the rotating tertiary wind and the refractory brick lifting device, a forced tumbling incineration scheme is adopted to ensure that the moisture in the solid waste is fully contacted with the high-temperature air for rapid drying and dehydration, and to achieve early ignition and combustion.

As shown in Figure 3: Through the setting of the inclination adjustment device 8, the working angle of the dynamic tertiary air duct 6 can be adjusted. Considering the movement speed and residence time of the material, an adjustable tertiary air duct angle device is added to the design of the supporting equipment, so that the material movement process can be more flexibly controlled.

Specific embodiment nine: This embodiment is a further limitation of specific embodiment eight. Two sets of transmission rods 84 are hingedly installed on the surface of the movable seat 85, and one end of the transmission rod 84 away from the movable seat 85 is hinged to the bottom of the carrier plate 71. A support plate 81 is welded to the lower right side of the bottom of the carrier plate 71, and the bottom of the support plate 81 is hinged to the fixed block 82.

The high-temperature tertiary air of the cement kiln system is used to assist combustion, which can ensure that most organic matter burns stably in the pipeline, so that it can be completely decomposed and burned to release heat after entering the decomposition furnace; based on the original tertiary air duct, part of the original tertiary air duct is renovated, and a power device is added to realize the rotation process, and solid waste is disposed of during the rotation process; the renovated tertiary air system has almost no impact on the existing burning system, and if production needs it, it can be quickly switched back to the original system to ensure stable production operation;

Compared with the strict control requirements of traditional hazardous waste incinerators on calorific value and harmful components, the use of high-temperature combustion-supporting tertiary air and online implantation ensures stable combustion in the dynamic tertiary air duct 6, and achieves stable combustion by introducing raw material carbonate decomposition and heat absorption.

A viewing window may be installed on the outside of the rotary kiln 60 to facilitate observation of the drying condition of the material inside the rotary kiln 60 .

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims (7)

1. A method for disposing solid waste by using tertiary air, comprising the following steps: garbage and three wind enter, adjust the tertiary wind use amount, introduce raw materials, set up sealing device and garbage ash decompose, its characterized in that:

Step A, garbage and three wind enter: solid waste and tertiary air enter from one side of the rotary tertiary air, waste gas and ash after garbage calcination enter a decomposing furnace (10) under the driving of the rotary motion of a transmission device, and a variable speed transmission device is designed to flexibly adjust the residence time of materials in a tertiary air pipe;

And B, adjusting the using amount of tertiary air: the flashboard is used for controlling the usage amount of tertiary air of the rotary furnace, so that 20% -80% of the tertiary air can be distributed into the furnace, oxygen is provided for garbage incineration, and the combustion atmosphere of the system is an oxygen-enriched atmosphere;

Step C, introducing raw materials: the stable combustion of the solid waste can release a large amount of heat, in order to ensure the safety of equipment and protect refractory materials, a part of raw materials are introduced into a dynamic three-time branch pipe in design, and the temperature in the pipe is controlled by utilizing the coupling balance between the decomposition heat absorption of the raw materials and the heat release of the solid waste combustion;

Step D, setting a sealing device: because the dynamic tertiary air pipe (6) is a rotary component, the system operates at negative pressure, high-temperature gas and materials exist, and special sealing devices are arranged at two ends for reducing air leakage and guaranteeing combustion conditions;

E, decomposing garbage ash residues: the garbage ash after being burnt by the dynamic tertiary air pipe (6) enters the decomposing furnace (10) from the additionally arranged unloading slope, so that the influence on the original system of the decomposing furnace (10) is reduced, the smooth feeding of materials into the furnace is ensured, and the materials enter the rotary kiln to finish calcination;

The step A comprises a furnace body (1) and is characterized in that: the bottom of the furnace body (1) is welded and fixed with the smoke chamber (2), a pulverized coal inlet pipe (5) is arranged on the upper right side of the furnace body (1), a dynamic tertiary air pipe (6) is arranged at the bottom of the pulverized coal inlet pipe (5), the bottom of the dynamic tertiary air pipe (6) is supported by an inclination angle adjusting device (8), the bottom of the inclination angle adjusting device (8) is fixed by a supporting frame (4), the supporting frame (4) is arranged on the base (3), a static tertiary air pipe (9) is arranged at one end, far away from the furnace body (1), of the dynamic tertiary air pipe (6), the left side of the static tertiary air pipe (9) is limited and supported by a supporting frame (7), and meanwhile, the bottom of the static tertiary air pipe (9) is communicated with the decomposing furnace (10); the dynamic tertiary air pipe (6) comprises a rotary kiln (60), a furnace outlet pipe (61), a first movable connection ring (62), a left side elastic connection cloth bag (63), a sealing structure (64), an annular bearing (65), a raw material inlet (66), a sealing door (67), a right side elastic connection cloth bag (68), a static air pipe inlet pipe (69), a second movable connection ring (70) and a carrier plate (71), the end part of the furnace outlet pipe (61) is fixedly welded with the outlet of the furnace body (1), and the end part of the static air pipe inlet pipe (69) is fixedly welded with the inlet of the static tertiary air pipe (9).

2. The method for disposing of solid waste by using tertiary air according to claim 1, wherein: sealing structure (64) is installed at the equal spiro union in both ends of rotary kiln (60), and the both ends of rotary kiln (60) are fixed with left side elastic connection sack (63), right side elastic connection sack (68) spiro union respectively through sealing structure (64), and the one end and the first swing joint ring (62) spiro union that sealing structure (64) were kept away from to left side elastic connection sack (63) simultaneously are fixed to the one end and the second swing joint ring (70) spiro union that sealing structure (64) were kept away from to right side elastic connection sack (68).

3. The method for disposing of solid waste by using tertiary air according to claim 1, wherein: the furnace outlet pipe (61) and the first movable connection circular ring (62) are in a concentric circle structure, and the furnace outlet pipe (61) and the first movable connection circular ring (62) are movably connected through a sealing bearing; the static air pipe inlet pipe (69) and the second movable connection circular ring (70) are of a concentric circle structure, and the static air pipe inlet pipe (69) and the second movable connection circular ring (70) are movably connected through a sealing bearing.

4. A method for disposing of solid waste using tertiary air according to claim 2, wherein: raw material inlet (66) has been seted up to rotary kiln (60) upper surface, and the upside of raw material inlet (66) is through hinge installation movable mounting sealing door (67), and sealing door (67) tip is fixed at rotary kiln (60) surface through bolted connection's mode.

5. The method for disposing of solid waste by using tertiary air according to claim 1, wherein: the inclination adjusting device (8) comprises a supporting plate (81), a fixed block (82), a mounting plate (83), a transmission rod (84), a movable seat (85), a screw rod (86), a driving motor (87), a limiting block (88) and a limiting column (89), wherein the screw rod (86) is movably mounted on the surface of the mounting plate (83), the screw rod (86) is in threaded connection with a threaded hole formed in the movable seat (85), and the end part of the screw rod (86) is fixed with an output shaft of the driving motor (87) through a coupler.

6. The method for disposing of solid waste using tertiary air according to claim 5, wherein: limiting blocks (88) are welded at two ends of the movable seat (85), limiting columns (89) are inserted into limiting holes in the limiting blocks (88), and the limiting columns (89) are arranged to be two groups and are arranged on the upper side surface of the mounting plate (83) through the fixing plates.

7. The method for disposing of solid waste using tertiary air according to claim 6, wherein: two groups of transmission rods (84) are hinged to the surface of the movable seat (85), one end, away from the movable seat (85), of each transmission rod (84) is hinged to the bottom of the carrier plate (71), the support plate (81) is welded to the right lower side of the bottom of the carrier plate (71), and the bottom of the support plate (81) is hinged to the fixed block (82).