CN111040789A - Oil-gas direct-combustion heating garbage pyrolysis device and garbage pyrolysis method - Google Patents
Oil-gas direct-combustion heating garbage pyrolysis device and garbage pyrolysis method Download PDFInfo
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- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
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Abstract
The embodiment of the invention provides a garbage pyrolysis device adopting oil gas direct combustion heating, which comprises a pyrolysis chamber, a heat insulation layer and a wall surface flue gas chamber, wherein the wall surface flue gas chamber is connected with the wall surface of the pyrolysis chamber, and the heat insulation layer is coated outside the wall surfaces of the pyrolysis chamber and the wall surface flue gas chamber; the oil gas direct-fired heating chamber is arranged in the pyrolysis chamber, high-temperature pyrolysis oil gas generated by pyrolysis is sent into the oil gas direct-fired heating chamber to be directly fired so as to heat materials in the pyrolysis chamber, and generated high-temperature flue gas is sent into the wall surface flue gas chamber to heat the materials in the pyrolysis chamber again through heat exchange. The oil gas direct-fired heating garbage pyrolysis device fully utilizes sensible heat and latent heat of pyrolysis high-temperature oil gas, improves the heat efficiency of a system, realizes low emission of pollution and improves the quality of pyrolysis products; the waste heat of the flue gas is utilized to heat the garbage materials at the same time, so that the materials are uniformly heated, and the problem of coking of the materials in the pyrolysis reactor is effectively solved. The embodiment of the invention also provides a garbage pyrolysis method using the oil-gas direct-combustion heating garbage pyrolysis device.
Description
Technical Field
The invention belongs to the technical field of garbage pyrolysis treatment, and particularly relates to an oil-gas direct-combustion heating garbage pyrolysis device. The invention also provides a garbage pyrolysis method using the oil gas direct-combustion heating garbage pyrolysis device.
Background
At present, the problem of garbage inundation is faced all over the world, and a large amount of garbage not only occupies precious land resources, but also causes the problems of environmental pollution and the like. The domestic garbage is used as an important component of garbage, and if the domestic garbage is not properly treated, the domestic environment, the ecological environment and the body health of people are influenced if the domestic garbage is not properly treated, and the image of a city or even a country and the sustainable development of the economic society are greatly influenced. The domestic garbage contains a large amount of organic matters, such as kitchen waste, plastics, waste paper and the like, and has the characteristics of recycling and resource reutilization, so that the reduction, resource utilization and harmless treatment of the domestic garbage are particularly important.
At present, a plurality of disposal modes of the domestic garbage are mainly landfill and incineration methods, but the aims of reducing, recycling and harmlessness of the domestic garbage cannot be simultaneously realized by the conventional disposal modes. Pyrolysis is a process of decomposing organic matters into combustible low-molecular compounds under the anoxic or anaerobic condition, and pyrolysis products including pyrolysis carbon, pyrolysis oil and pyrolysis gas can be obtained, so that the method is an effective means for realizing harmless, quantitative reduction and resource utilization of household garbage. However, due to the complexity of the components of the household garbage, a series of problems exist in the pyrolysis process, such as the overall thermal efficiency of the pyrolysis system is yet to be further improved; the difficulty of product separation is increased due to the adoption of solid or gas heat carrier heating, and the subsequent oil gas treatment difficulty and the organic sewage treatment capacity are high due to the complex garbage components and products; the garbage materials are coked due to uneven heating in the pyrolysis device, so that the pyrolysis efficiency is reduced; the pyrolysis gas is mixed with the heating flue gas, so that the quality of the oil gas is poor and the like. In view of this, there is a real need to develop a new generation of garbage pyrolysis technology to solve the problems in the organic garbage pyrolysis process.
Disclosure of Invention
The invention aims to solve the technical problems of low pyrolysis efficiency, high subsequent treatment difficulty, poor quality of product oil gas and the like of household garbage organic matters in the pyrolysis process in the prior art, and provides an oil gas direct-fired heating garbage pyrolysis device and a garbage pyrolysis method.
In order to solve the technical problems, the embodiment of the invention provides a garbage pyrolysis device adopting oil-gas direct combustion heating, which comprises a pyrolysis chamber, a heat insulation layer and a wall surface flue gas chamber, wherein the pyrolysis chamber is used for carrying out pyrolysis reaction on garbage materials in the pyrolysis chamber, and the heat insulation layer is coated outside the wall surface of the pyrolysis chamber and plays a role in heat insulation; the wall surface flue gas chamber is arranged between the pyrolysis chamber and the heat insulation layer and is connected with the wall surface of the pyrolysis chamber, wherein:
a bin for containing garbage materials is arranged at the upper part of one end of the pyrolysis chamber, an air outlet leading to the outside is arranged on the side wall of the other end of the pyrolysis chamber, and an outlet at the lower end of the bin is communicated with the pyrolysis chamber through a feeding screw to feed the garbage materials; a chain plate is horizontally arranged in the pyrolysis chamber, the chain plate is driven by a motor to transport garbage materials and solid pyrolysis products in the pyrolysis chamber, and a discharge hole for discharging pyrolytic carbon is formed in the bottom of the pyrolysis chamber at the transport tail end of the chain plate; the oil-gas direct-fired heating chamber is horizontally arranged in the middle of the pyrolysis chamber and comprises a direct-fired flue gas chamber, a burner and a direct-fired chamber flue gas outlet; the burners are distributed on one side wall in the direct-fired flue gas chamber and communicated with the gas outlet to input high-temperature pyrolysis oil gas; the direct combustion chamber flue gas outlet is distributed on the other side wall, opposite to the burner, in the direct combustion flue gas chamber and communicated with the wall surface flue gas chamber, high-temperature flue gas in the direct combustion flue gas chamber is sent into the wall surface flue gas chamber, and the wall surface flue gas chamber is provided with a wall surface flue gas outlet leading to the outside; the oil gas direct-fired heating chamber is characterized in that a decoking device is further arranged in the pyrolysis chamber, and the decoking device is horizontally arranged on the upper surface and the lower surface of the oil gas direct-fired heating chamber and used for removing cokes on the surface of the oil gas direct-fired heating chamber.
Preferably, the chain plates are arranged in two layers, the conveying directions of the two layers of chain plates are opposite, and the two layers of chain plates are respectively positioned above and below the oil-gas direct-combustion heating chamber.
Preferably, the number of the burners is 5-10, and the burners are uniformly distributed on the side wall in the direct combustion flue gas chamber; the number of the smoke outlets of the direct combustion chamber is 3-5.
Preferably, the burner is externally sleeved with a flame-proof sleeve, and the flame-proof sleeve can be made of heat-resistant materials such as silicon carbide and the like, and can be used for isolating high-temperature flame so as to prevent the high-temperature flame from directly contacting with the inner pipe body of the heating chamber.
Preferably, the decoking device comprises a rotating roller, a transmission chain and a decoking shovel, wherein: the rotation gyro wheel drives transmission chain reciprocating motion, the decoking shovel cross-section is trapezoidal, trapezoidal shorter base one end with transmission chain connects, trapezoidal longer base one end with the surface contact of oil gas direct combustion heating chamber.
The embodiment of the invention also provides a garbage pyrolysis method, and the device for directly combusting and heating garbage by using oil gas comprises the following steps:
1. removing inorganic matters in the garbage, and conveying the sorted organic garbage materials into the pyrolysis chamber through the feeding screw;
2. the garbage materials in the pyrolysis chamber are subjected to pyrolysis reaction under the transportation of the chain plate;
3. discharging pyrolytic carbon generated by pyrolysis in the pyrolysis chamber, inputting generated high-temperature pyrolysis oil gas into the oil gas direct-fired heating chamber for combustion, and generating high-temperature flue gas by combustion;
4. and sending the high-temperature flue gas in the oil gas direct-fired heating chamber into the wall surface flue gas chamber, and discharging the high-temperature flue gas after heat exchange.
Preferably, in the step 1, the organic waste material is particles with a particle size of less than 50 mm.
Preferably, in the step 2, the reaction temperature in the pyrolysis chamber is controlled to be 500-800 ℃.
Preferably, in the step 3, the temperature of the flue gas in the oil gas direct-fired heating chamber is controlled to be 900-1100 ℃.
Preferably, in the step 4, the temperature of the flue gas in the wall surface flue gas chamber is controlled to be 600-700 ℃.
According to the technical scheme of the embodiment of the invention, organic garbage materials are spirally conveyed to a chain plate in a pyrolysis chamber through a bin and a feeding screw, and the garbage materials are heated by an oil-gas direct-combustion heating chamber and a wall surface smoke chamber to generate pyrolysis reaction in the conveying process on the chain plate; the high temperature pyrolysis oil gas that the pyrolysis produced then sends into and burns in the oil gas direct combustion heating chamber, and the high temperature flue gas that the burning produced lets in wall flue gas chamber and is used for heating for the rubbish material, and its beneficial effect is as follows:
1. the oil gas high-temperature direct combustion pyrolysis garbage is adopted, sensible heat and latent heat of the pyrolysis high-temperature oil gas are fully utilized, the heat efficiency of a system is improved, and the high-temperature direct combustion of the oil gas is convenient for controlling the temperature of flue gas to be higher than the decomposition temperature of dioxin, so that low emission of pollution is realized;
2. the garbage is pyrolyzed without a heat carrier through high-temperature oil gas direct combustion, so that products are conveniently separated, the quality of oil gas is improved, and the reduction and resource utilization of the household garbage are facilitated;
3. the oil gas direct-fired heating chamber and the wall surface flue gas chamber simultaneously heat the garbage materials in the pyrolysis chamber, so that the garbage materials are uniformly heated, the problem of material coking in the pyrolysis reactor is solved, and efficient pyrolysis is realized;
4. the garbage treatment process does not produce or only produces a small amount of organic sewage, and the operation cost is low.
Drawings
FIG. 1 is a schematic structural diagram of a pyrolysis device for heating garbage by directly combusting oil gas provided by an embodiment of the invention;
FIG. 2 is a schematic structural view of the oil-gas direct-fired heating chamber shown in FIG. 1;
FIG. 3 is a schematic structural view of the decoking apparatus shown in FIG. 1;
fig. 4 is a flowchart illustrating steps of a method for pyrolyzing waste according to an embodiment of the present invention.
[ main component symbol description ]
1-a pyrolysis chamber; 11-a storage bin; 12-a feed screw; 13-link plate; 14-oil gas direct combustion heating chamber; 141-direct combustion flue gas chamber; 142-a burner; 143-flame barrier; 144-direct combustion chamber flue gas outlet; 15-a decoking device; 151-rotating rollers; 152-a drive chain; 153-decoking shovel; 16-an air outlet; 17-a discharge hole;
2-wall surface flue gas chamber; 21-wall flue gas outlet;
and 3, an insulating layer.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides an oil-gas direct-fired heating garbage pyrolysis device and a garbage pyrolysis method aiming at the existing problems.
In order to achieve the above technical solution, an embodiment of the present invention provides a refuse pyrolysis apparatus heated by oil gas direct combustion, as shown in fig. 1, including a pyrolysis chamber 1, a heat insulation layer 3 and a wall surface flue gas chamber 2, wherein the heat insulation layer 3 is coated outside a chamber wall of the pyrolysis chamber 1, the wall surface flue gas chamber 2 is disposed between the pyrolysis chamber 1 and the heat insulation layer 3 and connected to the chamber wall of the pyrolysis chamber 1, and wherein:
a bin 11 for containing garbage materials is arranged at the upper part of one end of the pyrolysis chamber 1, an air outlet 16 leading to the outside is arranged on the side wall of the other end of the pyrolysis chamber 1, and an outlet at the lower end of the bin 11 is communicated with the pyrolysis chamber 1 through a feeding screw 12 to feed the garbage materials; a chain plate 13 is horizontally arranged in the pyrolysis chamber 1, the chain plate 13 is driven by a motor to transport garbage materials and solid pyrolysis products in the pyrolysis chamber 1, and a discharge hole 17 for discharging pyrolytic carbon is formed in the bottom of the pyrolysis chamber 1 at the transport tail end of the chain plate 13; the oil-gas direct-fired heating chamber 14 is horizontally arranged in the middle of the pyrolysis chamber 1, as shown in fig. 2, the oil-gas direct-fired heating chamber 14 comprises a direct-fired flue gas chamber 141, a burner 142 and a direct-fired chamber flue gas outlet 144; the burner 142 is distributed on one side wall in the direct-fired flue gas chamber 141 and is communicated with the gas outlet 16 to input high-temperature pyrolysis oil gas; the flue gas outlet 144 of the direct combustion chamber is distributed on the other side wall of the direct combustion flue gas chamber 141 opposite to the burner 142 and communicated with the wall surface flue gas chamber 2, so that high-temperature flue gas in the direct combustion flue gas chamber 141 is sent into the wall surface flue gas chamber 2, and the wall surface flue gas chamber 2 is provided with a wall surface flue gas outlet 21 leading to the outside; the pyrolysis chamber 1 is also internally provided with a decoking device 15, and the decoking device 15 is horizontally arranged on the upper surface and the lower surface of the oil-gas direct-fired heating chamber 14 and is used for removing cokes on the surface of the oil-gas direct-fired heating chamber 14.
Example 1
The utility model provides a rubbish pyrolysis device, as shown in fig. 1, mainly comprises pyrolysis chamber 1, heat preservation 3 and wall flue gas chamber 2, and including pyrolysis chamber 1 and wall flue gas chamber 2 together are wrapped up by heat preservation 3, wherein, pyrolysis chamber 1 includes feed bin 11, feeding spiral 12, link joint 13, oil gas direct combustion heating chamber 14, decoking ware 15, gas outlet 16 and discharge gate 17, and wall flue gas chamber 2 includes wall exhanst gas outlet 21, and is specific:
the feed bin 11 is located the 1 one end upper portion position of pyrolysis chamber, and 11 lower extremes of feed bin are provided with feeding spiral 12, and organic waste material can be carried into in the pyrolysis chamber 1 by feeding spiral 12.
The chain plate 13 is positioned inside the pyrolysis chamber 1, is horizontally arranged, can be driven by a variable frequency motor, and plays a role in conveying materials; in a better embodiment, the chain plates 13 are arranged in two layers respectively above and below the oil-gas direct-combustion heating chamber 14, and the conveying directions of the two layers of chain plates 13 are opposite.
The gas outlet 16 is positioned on the side surface of the pyrolysis chamber 1 and used for leading out high-temperature pyrolysis oil gas; the discharge port 17 is arranged at the bottom of the pyrolysis chamber, and is positioned at the position below the tail end of the lower chain plate 13 in the embodiment, and the pyrolysis carbon generated by pyrolysis is directly discharged out of the pyrolysis chamber 1 through the discharge port 17 under the transportation of the chain plate 13.
The oil-gas direct-fired heating chamber 14 is positioned in the pyrolysis chamber 1 and is horizontally arranged, and high-temperature pyrolysis oil gas generated by pyrolysis in the pyrolysis chamber 1 is used as fuel to be combusted in the oil-gas direct-fired heating chamber 14 to heat materials in the pyrolysis chamber 1; the oil gas direct-fired heating chamber 14 is composed of a burner 142, a flame-proof sleeve 143, a direct-fired flue gas chamber 141 and a direct-fired chamber flue gas outlet 144, wherein: the number of the burners 142 is usually 5-10, and the burners are uniformly distributed on one side wall of the direct-fired flue gas chamber 141; the burner 142 is externally sleeved with a flame-proof sleeve 143, and the flame-proof sleeve 143 can be made of heat-resistant materials such as silicon carbide and the like, and can be used for preventing high-temperature flame from directly contacting with the inner pipe body of the heating chamber; the number of the flue gas outlets 144 of the direct combustion chamber is usually 3-5, and the flue gas outlets are arranged on the side wall of the direct combustion flue gas chamber 141 opposite to the burner 142; as shown in fig. 2, in the present embodiment, the number of the burners 142 is 7, and the number of the flue gas outlets 144 of the direct combustion chamber is 3.
The decoking devices 15 are positioned on the upper surface and the lower surface of the oil-gas direct-fired heating chamber 14 and are used for removing cokes formed on the upper surface and the lower surface of the oil-gas direct-fired heating chamber in the pyrolysis process of the garbage materials; as shown in fig. 3, in this embodiment, the decoking device 15 is composed of a rotating roller 151, a transmission chain 152 and a decoking shovel 153, wherein the section of the decoking shovel 153 is trapezoidal, the end of the short bottom of the decoking shovel 153 is connected with the transmission chain 152, the end of the long bottom is in contact with the surface of the oil-gas direct-fired heating chamber 14, and when the rotating roller 151 rotates to drive the transmission chain 152 to reciprocate, the decoking shovel 153 scrapes off the coked materials on the upper and lower surfaces of the oil-gas direct-fired heating chamber 14;
the wall surface flue gas chamber 2 is connected with the wall surface of the pyrolysis chamber 1, high-temperature flue gas generated in the oil gas direct-fired heating chamber 14 is sent into the wall surface flue gas chamber 2 through a flue gas outlet 144 of the direct-fired chamber, materials in the pyrolysis chamber 1 are heated through heat exchange, and the high-temperature flue gas waste heat generated by high-temperature pyrolysis oil gas combustion is fully utilized; the high-temperature flue gas in the wall flue gas chamber 2 is discharged through the wall flue gas outlet 21.
In order to better implement the above technical solution, an embodiment of the present invention further provides a method for pyrolyzing waste, where the oil-gas direct-combustion heating waste pyrolysis apparatus described in the above embodiment is used, as shown in fig. 4, the method includes the steps of:
s1, removing inorganic matters in the garbage, and conveying the sorted organic garbage materials into a pyrolysis chamber through a feeding screw;
s2, carrying out pyrolysis reaction on the garbage materials in the pyrolysis chamber under chain plate transportation;
s3, discharging pyrolytic carbon generated by pyrolysis in the pyrolysis chamber, inputting the generated high-temperature pyrolysis oil gas into the oil gas direct-combustion heating chamber for combustion, and generating high-temperature flue gas by combustion;
and S4, sending high-temperature flue gas in the oil gas direct-fired heating chamber into a wall surface flue gas chamber, and discharging the high-temperature flue gas after heat exchange.
Example 2
Pyrolysis treatment process of certain household garbage:
the domestic garbage of a garbage station comprises the following specific components:
the treatment process comprises the following steps:
1. inorganic substances such as muck, metal and the like in the household garbage are removed through sorting, and the residual garbage materials are conveyed into a storage bin and then are conveyed into a pyrolysis chamber of an oil-gas direct-combustion heating garbage pyrolysis device through a feeding screw;
2. conveying the garbage materials by using a chain plate in a pyrolysis chamber, wherein the garbage materials are subjected to pyrolysis reaction;
3. discharging pyrolytic carbon generated by pyrolysis in the pyrolysis chamber from a discharge hole at the bottom of the pyrolysis chamber, and feeding high-temperature pyrolysis oil gas generated by pyrolysis into the oil gas direct-fired heating chamber through a gas outlet on the side wall of the pyrolysis chamber for combustion to generate high-temperature flue gas;
4. high-temperature flue gas in the oil gas direct-fired heating chamber is sent into the wall surface flue gas chamber through a flue gas outlet of the direct-fired chamber, and the high-temperature flue gas is finally discharged from the wall surface flue gas outlet after heating materials in the pyrolysis chamber.
Wherein:
in the step 1, the organic garbage can comprise kitchen wastes, waste plastics, waste paper, waste fabrics, bamboo and wood, rubber and the like, and the organic garbage material is particles with the particle size of less than 50 mm;
in the step 2, the reaction temperature in the pyrolysis chamber is controlled to be 500-800 ℃.
In the step 3, the temperature of the flue gas in the oil gas direct combustion heating chamber is controlled to be 900-1100 ℃, the high-temperature pyrolysis oil gas direct combustion effectively utilizes the sensible heat and the latent heat thereof, the combustion temperature is ensured to be higher than the lowest decomposition temperature of dioxin, the decomposition of the dioxin is ensured, and the emission of the dioxin is greatly reduced;
in the step 4, the temperature of the flue gas in the wall flue gas chamber is controlled to be 600-700 ℃, and the regeneration of dioxin is avoided.
Finally, the yield of the pyrolytic carbon is 8.1 percent, the reduction of the organic waste is 91.8 percent, and the smoke emission reaches the standard, wherein the emission of dioxin is less than 0.5ngTEQ/Nm3。
The oil gas direct combustion heating garbage pyrolysis device and the garbage pyrolysis method in the embodiment utilize sensible heat and latent heat of high-temperature pyrolysis oil gas through high-temperature pyrolysis oil gas direct combustion, simultaneously make full use of high-temperature flue gas waste heat, and ensure uniform heating of garbage materials through the arranged devices such as the chain plate and the decoking device, improve the heat efficiency of a system, realize low emission of high-efficiency pyrolysis and pollution, and solve the technical difficulties faced by the conventional garbage pyrolysis device.
For the embodiments of the present invention, the common general knowledge of the known specific structures and characteristics in the schemes is not described too much; the embodiments are described in a progressive manner, technical features related to the embodiments can be combined with each other on the premise of not conflicting with each other, and the same and similar parts among the embodiments can be referred to each other.
In the description of the present invention, the terms "upper", "middle", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the present invention; the terms "communicate," "connect," and the like, unless expressly stated or limited otherwise, are intended to be inclusive and mean that there may be, for example, direct connection or communication, indirect connection through intervening media, and internal connection between two elements.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A garbage pyrolysis device adopting oil gas direct combustion heating comprises a pyrolysis chamber (1) for performing pyrolysis reaction on garbage materials, and is characterized by further comprising a wall surface flue gas chamber (2) and a heat insulation layer (3); the heat-insulating layer (3) is coated outside the wall of the pyrolysis chamber (1); the wall surface flue gas chamber (2) is arranged between the pyrolysis chamber (1) and the heat insulation layer (3) and is connected with the wall surface of the pyrolysis chamber (1), wherein:
a bin (11) for containing garbage materials is arranged at the upper part of one end of the pyrolysis chamber (1), an air outlet (16) leading to the outside is arranged on the side wall of the other end of the pyrolysis chamber (1), and an outlet at the lower end of the bin (11) is communicated with the pyrolysis chamber (1) through a feeding screw (12) to feed the garbage materials; a chain plate (13) is horizontally arranged in the pyrolysis chamber (1), the chain plate (13) is driven by a motor to convey garbage materials and solid pyrolysis products in the pyrolysis chamber (1), and a discharge hole (17) for discharging pyrolysis carbon is formed in the bottom of the pyrolysis chamber (1) at the conveying end position of the chain plate (13);
the oil-gas direct-fired heating chamber (14) is horizontally arranged in the middle of the pyrolysis chamber (1), and the oil-gas direct-fired heating chamber (14) comprises a direct-fired flue gas chamber (141), a burner (142) and a direct-fired chamber flue gas outlet (144); the burner (142) is distributed on one side wall in the direct-fired flue gas chamber (141) and communicated with the gas outlet (16) to input high-temperature pyrolysis oil gas; the direct combustion chamber flue gas outlet (144) is distributed on the other side wall opposite to the burner (142) in the direct combustion flue gas chamber (141) and is communicated with the wall surface flue gas chamber (2), high-temperature flue gas in the direct combustion flue gas chamber (141) is sent into the wall surface flue gas chamber (2), and the wall surface flue gas chamber (2) is provided with a wall surface flue gas outlet (21) leading to the outside;
still be provided with decoking ware (15) in pyrolysis chamber (1), decoking ware (15) level set up in the upper surface and the lower surface of oil gas direct-fired heating chamber (14) are used for cleaing away the coking thing on oil gas direct-fired heating chamber (14) surface.
2. The waste pyrolysis device of claim 1, characterized in that the chain plates (13) are provided with two layers, and the conveying directions of the two layers of chain plates (13) are opposite and are respectively positioned above and below the oil-gas direct-combustion heating chamber (14).
3. The waste pyrolysis device according to claim 1, characterized in that the number of the burners (142) is 5-10, and the burners are uniformly distributed on the side wall in the direct combustion flue gas chamber (141); the number of the flue gas outlets (144) of the direct combustion chamber is 3-5.
4. A refuse pyrolysis apparatus according to claim 1, characterized in that the burner (142) is surrounded by a flame barrier (143) made of silicon carbide.
5. A waste pyrolysis device according to any one of claims 1 to 4, characterized in that the decoking device (15) comprises rotating rollers (151), a transmission chain (152) and a decoking shovel (153), wherein: rotate gyro wheel (151) and drive chain (152) reciprocating motion, decoking shovel (153) cross-section is trapezoidal, trapezoidal shorter base one end with drive chain (152) are connected, trapezoidal longer base one end with the surface contact of oil gas direct combustion heating chamber (14).
6. A method for pyrolyzing refuse by using the oil and gas direct-fired heating refuse pyrolysis apparatus of any one of claims 1 to 5, comprising the steps of:
① removing inorganic matter from the waste, feeding the sorted organic waste material into the pyrolysis chamber through the feed screw;
② the garbage material in the pyrolysis chamber is subjected to pyrolysis reaction under the transportation of the chain plates;
③, discharging pyrolytic carbon generated by pyrolysis in the pyrolysis chamber, inputting generated high-temperature pyrolysis oil gas into the oil gas direct-combustion heating chamber for combustion, and generating high-temperature flue gas by combustion;
④, the high-temperature flue gas in the oil gas direct-fired heating chamber is sent into the wall surface flue gas chamber, and the high-temperature flue gas is discharged after heat exchange.
7. The process of pyrolysis of waste of claim 6, wherein in step ①, the organic waste material is in the form of particles having a size of less than 50 mm.
8. The method of claim 6, wherein in step ②, the reaction temperature in the pyrolysis chamber is controlled to be 500-800 ℃.
9. The method for pyrolyzing refuse according to claim 6, wherein in step ③, the temperature of flue gas in the oil-gas direct-fired heating chamber is controlled to be 900-1100 ℃.
10. The garbage pyrolysis method according to claim 6, wherein in the step ④, the temperature of the flue gas in the wall flue gas chamber is controlled to be 600-700 ℃.
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| CN113481022A (en) * | 2021-07-12 | 2021-10-08 | 北京博霖环境科技有限公司 | Self-cleaning static rotary pyrolysis device |
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