CN106468432B - Method for preventing garbage pyrolysis from blocking and garbage pyrolysis device used by same - Google Patents
Method for preventing garbage pyrolysis from blocking and garbage pyrolysis device used by same Download PDFInfo
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- CN106468432B CN106468432B CN201510518454.2A CN201510518454A CN106468432B CN 106468432 B CN106468432 B CN 106468432B CN 201510518454 A CN201510518454 A CN 201510518454A CN 106468432 B CN106468432 B CN 106468432B
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Abstract
The invention discloses a method for preventing garbage pyrolysis stagnation and a garbage pyrolysis device used by the same. In order to overcome the defects that the conventional garbage pyrolysis is easy to block and generate dioxin, and the construction, operation and maintenance costs are high, the garbage pyrolysis device is used for pyrolyzing and screening the garbage in the transverse movement, performing solid-phase pyrolysis below the transverse movement of the garbage and performing gas-phase pyrolysis above the transverse movement of the garbage, and is provided with a screening mechanism, at least two solid-phase pyrolysis chambers are arranged below the screening mechanism, and a gas-phase pyrolysis chamber is arranged above the screening mechanism. The invention is used for garbage disposal, can prevent the garbage from pyrolysis and blocking, realizes automatic screening of the garbage during the incineration process, and carries out classification chamber progressive pyrolysis, the pyrolysis is sufficient and energy-saving, the generation of dioxin can be better prevented, the space utilization rate is high, the occupied area is small, the construction investment can be reduced, the operation and maintenance cost is low, and the effect benefit of the garbage disposal is better.
Description
Technical Field
The invention relates to a method for preventing garbage pyrolysis stagnation and a garbage pyrolysis device used by the same.
Background
The garbage pyrolysis is a garbage disposal means widely adopted in developed countries, and the proportion of the garbage incineration pyrolysis disposal in countries with scarcity of cultivated land such as Japan reaches 65-80%. However, the existing garbage incineration pyrolysis treatment device has the following defects:
firstly, the existing garbage pyrolysis method is easy to generate pyrolysis blockage. The blockage in the pyrolysis process not only increases the maintenance and operation cost, but also changes the pyrolysis state, influences the control of inhibiting the generation of dioxin at the front section of the incineration process, increases the difficulty and cost of subsequent dioxin treatment, and increases the possibility of secondary pollution caused by the subsequent purification and removal of dioxin-like substances in flue gas.
Secondly, the existing garbage pyrolysis device can not realize the automatic screening of the garbage in the incineration process, and the classified progressive pyrolysis is carried out, so as to better prevent the generation of dioxin. The existing garbage mixture contains domestic organic matters, and various components such as plastics, glass, ceramic chips, metal, cement blocks and the like, and the classification treatment difficulty before incineration is high, and the cost is high, so that the garbage mixture is mostly adopted to be directly put into a furnace for incineration. However, the problem of burning the garbage mixture directly in the furnace without screening is that the burning temperature is difficult to adapt to organic garbage which is easy to generate dioxin and inorganic garbage which is easy to cause blockage, influence the burning state and discharge slag.
Secondly, the process flow and the mechanism unit of the existing pyrolysis device extend transversely, and gaseous substances such as moisture, smoke and the like generated in the garbage pyrolysis process and easy to rise are moved transversely by a high-power induced draft fan to enter the next treatment, especially the hot gas generated by the preliminary pyrolysis of organic matters easy to generate dioxin, so that the secondary combustion further treatment energy consumption is high, the treatment is difficult to be sufficient, and the pyrolysis effect for preventing the generation of the dioxin is not ideal; and the mechanism units extend transversely, so that the occupied area is large and the one-time investment is large. The establishment mark 142 + 2009 provides that the investment estimation of main equipment and a system of a newly-built grate incinerator, which mainly take import as main, can be controlled according to the value of not more than 50 ten thousand yuan/(t/d); the investment estimation of the localization of all main equipment of the grate furnace incineration plant can be controlled according to 40 ten thousand yuan/(t/d) or less; the investment estimation index of the newly-built fluidized bed furnace incineration plant can be controlled according to the condition that the investment estimation index is not higher than 35 ten thousand yuan/(t/d). In this regard, an undeveloped economic basis and a strong investment capacity are difficult to build.
Thirdly, the existing waste incineration pyrolysis device needs more auxiliary energy, and the utilization efficiency of the heat generated by waste incineration is not high enough, so that the waste incineration cost is high. In addition, the existing garbage incineration device has higher requirements on the heat value and the moisture of the garbage. CJ/T118-2000 stipulation, "the annual average moisture content of the domestic garbage entering the furnace is not more than 50%, the annual average ash content is not more than 30%, and the annual average low-grade calorific value is not less than 4.18 MJ/kg". In order to ensure stable combustion, the technical code of domestic garbage disposal engineering stipulates that the garbage incinerator needs to be provided with an ignition burner and an auxiliary burner, and a large amount of auxiliary fuel needs to be consumed.
The defects of the existing garbage pyrolysis device greatly limit the popularization and application of the garbage incineration pyrolysis in China, particularly the application in small and medium-sized cities.
Although some domestic units and individuals have been dedicated to the research of the waste incineration pyrolysis device, the existing shortcomings are attempted to be overcome. For example, document CN201410085904.9 discloses that a pretreatment system, a flue gas treatment system, and a leachate treatment system are added to the existing garbage power generation system, and a beneficial attempt is made to reduce the generation of dioxin precursors; document CN201320090207.3 discloses the use of an oxygen-enriched combustion device and a secondary air system to ensure the combustion temperature of the waste gas of an incinerator to the maximum extent, so as to facilitate the turbulent flow of a secondary combustion chamber, prolong the retention time in the secondary combustion chamber, and achieve certain effect in decomposing dioxin. However, these technologies cannot prevent pyrolysis blockage, cannot automatically screen garbage in pyrolysis, and perform classified chamber-division progressive pyrolysis, cannot better prevent the generation of dioxin, and are not highly practical, and the pyrolysis effect benefit needs to be further improved.
Disclosure of Invention
The invention aims to overcome the defects, and provides a method for preventing garbage pyrolysis and blockage and a garbage pyrolysis device used by the method, which can prevent garbage pyrolysis and blockage, realize automatic screening of garbage in the incineration process, realize classified chamber-division progressive pyrolysis, have sufficient pyrolysis and energy conservation, can better realize environment-friendly pyrolysis of the garbage for preventing dioxin from generating, have high space utilization rate and small occupied area, can reduce construction investment, have low operation and maintenance cost, and have better garbage treatment effect and benefit.
In order to achieve the purpose, the technical scheme of the invention is that the method for preventing the pyrolysis and blockage of the garbage comprises the following steps:
a. the garbage is moved transversely in the garbage pyrolysis device, and pyrolysis screening is carried out in the transverse movement;
b. the solid phase pyrolysis of the garbage is carried out below the transverse movement of the garbage, and the gas phase pyrolysis of the garbage is carried out above the transverse movement of the garbage.
The garbage pyrolysis device used in the method for preventing garbage pyrolysis stagnation comprises a cavity with a garbage inlet, wherein the cavity is provided with a screening mechanism for receiving garbage, the screening mechanism is provided with at least two screening rollers which are transversely arranged at intervals and move in the same direction, at least two solid phase pyrolysis chambers are arranged below the screening mechanism, a gas phase pyrolysis chamber is arranged above the screening mechanism, and the screening mechanism, the solid phase pyrolysis chamber and the gas phase pyrolysis chamber are respectively provided with a hot air conveying mechanism.
The solid-phase pyrolysis chambers are provided with inclined walls which are connected with each other, each solid-phase pyrolysis chamber is provided with a burning-out chamber, an air cavity and an ash slag channel, the air cavity is communicated with the burning-out chamber through an air channel of the interlayer, the ash slag channel is communicated with the burning-out chamber and penetrates through the interlayer and the air cavity, the peripheral wall of the ash slag channel passing through the air cavity is provided with a lug, and the air cavity is connected with a hot air conveying mechanism.
The gas phase pyrolysis chamber is provided with a mixed rotation middle cavity and an air compression peripheral cavity, the upper end and the lower end of the mixed rotation middle cavity are provided with openings, the mixed rotation middle cavity is communicated with the air compression peripheral cavity through an air compression channel on the peripheral wall of the mixed rotation middle cavity, the air compression channel is obliquely cut through the peripheral wall of the mixed rotation middle cavity, and the air compression peripheral cavity is connected with a hot air conveying mechanism.
Be equipped with the moisture passageway between rubbish entry and gaseous phase pyrolysis room the top of gaseous phase pyrolysis room is equipped with mixes the gas passageway, moisture passageway, gaseous phase pyrolysis room respectively with mix the gas passageway intercommunication, mix the gas passageway and mix the gas pyrolysis room intercommunication.
A guide partition is arranged below the moisture channel and the gas phase pyrolysis chamber.
Compared with the prior art device, the invention enables the garbage to move transversely in the garbage pyrolysis device (the conventional garbage is pyrolyzed vertically), and the garbage is pyrolyzed and screened in the transverse movement; in the garbage transverse movement, preliminary pyrolysis, drying, shrinkage and progressive screening are carried out, solid-phase pyrolysis is carried out on the solid-phase objects of the garbage under the screen under the garbage transverse movement, and gas-phase pyrolysis is carried out on the gas-phase objects generated by the garbage in the garbage transverse movement pyrolysis and the solid-phase pyrolysis above the garbage transverse movement. The progressive pyrolysis and screening in the movement can further be carried out in a chambered way, so that pyrolysis stagnation can be prevented; and because the progressive motion pyrolysis screening and the chamber-divided pyrolysis are provided with hot air conveying mechanisms capable of supplying different temperatures, the chamber-divided classification pyrolysis can be realized, and the generation of dioxin in the pyrolysis can be better prevented.
The screening mechanism for receiving the garbage is arranged in the cavity and provided with at least two screening rollers which are transversely arranged at intervals and move in the same direction, at least two solid-phase pyrolysis chambers are arranged below the screening mechanism, a gas-phase pyrolysis chamber is arranged above the screening mechanism, and the screening mechanism, the solid-phase pyrolysis chamber and the gas-phase pyrolysis chamber are respectively provided with a hot air conveying mechanism.
The screening mechanism can be provided with a plurality of screening rollers which transversely move at intervals and move in the same direction and a hot air conveying mechanism, so that the garbage transversely moves, pyrolyzes and screens, and hot air with different temperatures can be respectively introduced into the screening mechanism, the gas-phase pyrolysis chamber and the solid-phase pyrolysis chamber according to requirements. When garbage enters the screening mechanism from a garbage inlet or enters the screening rollers on one end or one side of the screening mechanism, the garbage can directionally advance towards the other end or the other side of the screening mechanism, various components in the garbage can realize progressive pyrolysis, volume reduction (volume reduction) and screening at different temperatures in different sections in the advancing process of the screening mechanism, certain substances in the garbage can fall into the solid phase pyrolysis chamber below the screening mechanism through the screening rollers at intervals in the advancing process, the pyrolysis at different temperatures is further carried out, water mist and smoke generated by the pyrolysis of the garbage in the screening mechanism and the solid phase pyrolysis chamber can rise upwards, and the water mist and the smoke enter the gas phase pyrolysis chamber above the screening mechanism for further pyrolysis. Thus, the garbage is screened, classified and respectively pyrolyzed in the advancing process, so that pyrolysis blockage is prevented, hot air below 300 ℃ can be supplied as required in the primary pyrolysis and shrinkage stage of the screening mechanism, the garbage entering the pyrolysis cavity is firstly preheated, dried, shrunk and primarily pyrolyzed, so that organic matters generating dioxin are pyrolyzed and gasified at the temperature without generating dioxin to generate combustible organic matters not generating dioxin (experiments show that the organic matters easily generating dioxin in the garbage can be pyrolyzed and gasified to the combustible organic matters not generating dioxin at the temperature below 300 ℃), the combustible organic matters are further guided into a gas phase pyrolysis chamber and the like above the screening mechanism and are mixed with hot air at the temperature of 300-600 ℃ for secondary combustion, so that the generation of dioxin-like substances can be completely pyrolyzed and oxidized without generating dioxin, secondary pollution of pyrolysis is avoided, and thus the generation of dioxin-like substances is prevented from the source, instead of the prior method of purifying the incineration flue gas to ensure that dioxin substances reach the standard and are discharged.
According to the invention, flue gas enters from the lower opening of the mixed-rotation middle cavity of the gas-phase pyrolysis chamber, and is mixed with hot air with higher temperature entering from the air compression peripheral cavity to form cyclone mixed combustion, and the rotary ascending combustion is further pyrolyzed, so that extrusion-spraying rotation can be better formed under the action of the induced draft fan, and ascending combustion is carried out upwards, so that pyrolysis is more sufficient, no dead angle exists, dioxin is better prevented from being generated, energy consumption is low, and the effect is good.
According to the invention, a moisture channel is arranged between the garbage inlet and the gas phase pyrolysis chamber, a gas mixing channel is arranged above the gas phase pyrolysis chamber, the moisture channel and the gas phase pyrolysis chamber are respectively communicated with the gas mixing channel, the gas mixing channel is communicated with the gas mixing pyrolysis chamber, and a guide partition is arranged below the space between the moisture channel and the gas phase pyrolysis chamber. Therefore, the gas-phase substances can be better classified and gradually pyrolyzed in the chambers, the gaseous substances can be better fully pyrolyzed, and the generation of dioxin can be prevented.
The solid phase pyrolysis chamber is provided with inclined walls which are mutually connected, the air cavity is communicated with the burning-out chamber through an air channel of the interlayer, the ash passage is communicated with the burning-out chamber and penetrates through the interlayer and the air cavity, and the peripheral wall of the ash passage passing through the air cavity is provided with a lug. Like this can realize the categorised locellus pyrolysis of solid phase material better under the fluidization state, the heat energy of pyrolysis can heat the wind cavity through the lime-ash passageway fully moreover, makes the wind of wind channel spun satisfy the requirement of temperature, pressure better, makes the fluidization state better, makes the pyrolysis more energy-conserving.
The invention is used for garbage disposal, can prevent the garbage from pyrolysis and blocking, realizes automatic screening of the garbage during the incineration process, and carries out classification chamber progressive pyrolysis, the pyrolysis is sufficient and energy-saving, the generation of dioxin can be better prevented, the space utilization rate is high, the occupied area is small, the construction investment can be reduced, the operation and maintenance cost is low, and the effect benefit of the garbage disposal is better.
Drawings
FIG. 1 is a cross-sectional view of a waste pyrolysis apparatus of the present invention.
In the figure, 1, a cavity, 2, a gas mixing pyrolysis chamber, 3, a gas phase pyrolysis chamber, 4, a gas mixing channel, 5, a moisture channel, 6, a mixing rotation middle cavity, 7, a gas compression peripheral cavity, 8, a guide partition, 9, a garbage inlet, 10, a screening mechanism, 11, a burning chamber, 12, an interlayer, 13, a wind cavity, 14, an ash channel, 15, a solid phase pyrolysis chamber and 16, a lug.
Detailed Description
Taking household garbage as an example, the method for preventing garbage pyrolysis blockage of the invention comprises the following steps:
a. the garbage is moved transversely in the garbage pyrolysis device, and pyrolysis screening is carried out in the transverse movement;
b. the solid phase pyrolysis of the garbage is carried out below the transverse movement of the garbage, and the gas phase pyrolysis of the garbage is carried out above the transverse movement of the garbage.
As shown in fig. 1, the waste pyrolysis device used in the method for preventing waste pyrolysis stagnation of the present invention comprises a cavity 1 having a waste inlet 9, wherein the cavity 1 is provided with a sieving mechanism 10 for receiving waste at the waste inlet, the sieving mechanism 10 has at least two sieving rollers which are transversely arranged (from left to right facing fig. 1) at intervals and move in the same direction, at least three solid phase pyrolysis chambers 15 are arranged below the sieving mechanism 10, a gas phase pyrolysis chamber 3 is arranged above the sieving mechanism 10, and the sieving mechanism 10, the solid phase pyrolysis chamber 15 and the gas phase pyrolysis chamber 3 are respectively provided with a hot air conveying mechanism.
Each solid phase pyrolysis chamber 15 is provided with inclined walls which are connected with each other, each solid phase pyrolysis chamber 15 is provided with an ash chamber 11, an air cavity 13 and an ash channel 14, the air cavity 13 is communicated with the ash chamber 11 through an air channel of the interlayer 12, the ash channel 14 is communicated with the ash chamber 11 and penetrates through the interlayer 12 and the air cavity 13, a lug 16 is arranged on the peripheral wall of the ash channel passing through the air cavity 13, and the air cavity 13 is connected with a hot air conveying mechanism.
The gas-phase pyrolysis chamber 3 is provided with a mixed rotation middle cavity 6 and an air compressing peripheral cavity 7, the upper end and the lower end of the mixed rotation middle cavity 6 are provided with openings, the mixed rotation middle cavity 6 is communicated with the air compressing peripheral cavity 7 through an air compressing channel on the peripheral wall of the mixed rotation middle cavity, the air compressing channel is obliquely cut through the peripheral wall of the mixed rotation middle cavity, and the air compressing peripheral cavity 7 is connected with a hot air conveying mechanism.
Be equipped with moisture passageway 5 between the lateral wall that sets up rubbish entry 9 and gaseous phase pyrolysis chamber 3 the top of gaseous phase pyrolysis chamber 3 is equipped with mixes gas passageway 4, moisture passageway 5, gaseous phase pyrolysis chamber 3 respectively with mix gas passageway 4 intercommunication, mix gas passageway 4 and mix gas pyrolysis chamber 2 intercommunication, further, mix gas pyrolysis chamber can be connected with heat exchange mechanism, purification mechanism etc..
A guide partition 8 is provided below the side wall between the moisture channel 5 and the gas phase pyrolysis chamber 3.
Furthermore, the screening roller of the screening mechanism can be connected with a power mechanism, the power mechanism can be connected with a control device, and the rotation speed and force of the screening roller can be automatically adjusted as required, so that the preheating and drying effects and the primary pyrolysis efficiency of the chamber-entering garbage at the temperature below 300 ℃ without generating dioxin can be improved.
Still further, the interval between the screen rollers of the present invention can be adjusted, which can improve the adaptability.
Claims (4)
1. A garbage pyrolysis device comprises a cavity (1) with a garbage inlet (9), and is characterized in that a screening mechanism (10) for receiving garbage is arranged on the cavity (1), the screening mechanism (10) is provided with at least two screening rollers which are transversely arranged at intervals and move in the same direction, at least two solid-phase pyrolysis chambers (15) are arranged below the screening mechanism (10), a gas-phase pyrolysis chamber (3) is arranged above the screening mechanism (10), and the screening mechanism (10), the solid-phase pyrolysis chambers (15) and the gas-phase pyrolysis chamber (3) are respectively provided with a hot air conveying mechanism; each solid phase pyrolysis chamber (15) is provided with inclined walls which are connected with each other, each solid phase pyrolysis chamber (15) is provided with an ash chamber (11), an air cavity (13) and an ash channel (14), the air cavity (13) is communicated with the ash chamber (11) through an air channel of the interlayer (12), the ash channel (14) is communicated with the ash chamber (11) and penetrates through the interlayer (12) and the air cavity (13), a lug (16) is arranged on the peripheral wall of the ash channel passing through the air cavity (13), and the air cavity (13) is connected with a hot air conveying mechanism.
2. The waste pyrolysis device according to claim 1, wherein the gas phase pyrolysis chamber (3) is provided with a mixed rotation middle cavity (6) and an air compressing peripheral cavity (7), the upper end and the lower end of the mixed rotation middle cavity (6) are provided with openings, the mixed rotation middle cavity (6) is communicated with the air compressing peripheral cavity (7) through an air compressing channel on the peripheral wall of the mixed rotation middle cavity, the air compressing channel is obliquely cut through the peripheral wall of the mixed rotation middle cavity, and the air compressing peripheral cavity (7) is connected with a hot air conveying mechanism.
3. A waste pyrolysis device according to claim 1, characterized in that a moisture channel (5) is arranged between the waste inlet (9) and the gas phase pyrolysis chamber (3), a gas mixing channel (4) is arranged above the gas phase pyrolysis chamber (3), the moisture channel (5) and the gas phase pyrolysis chamber (3) are respectively communicated with the gas mixing channel (4), and the gas mixing channel (4) is communicated with the gas mixing pyrolysis chamber (2).
4. A waste pyrolysis device according to claim 3, characterized in that a guide partition (8) is provided below between the moisture channel (5) and the gas phase pyrolysis chamber (3).
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| CN201510518454.2A CN106468432B (en) | 2015-08-22 | 2015-08-22 | Method for preventing garbage pyrolysis from blocking and garbage pyrolysis device used by same |
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| CN201510518454.2A CN106468432B (en) | 2015-08-22 | 2015-08-22 | Method for preventing garbage pyrolysis from blocking and garbage pyrolysis device used by same |
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| CN106468432A CN106468432A (en) | 2017-03-01 |
| CN106468432B true CN106468432B (en) | 2020-07-10 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2043710U (en) * | 1989-03-09 | 1989-08-30 | 崔克勤 | Helical propelling continuous incinerator of refuse |
| CN1687646A (en) * | 2005-05-21 | 2005-10-26 | 郭炜明 | Thermal cracking gasification oven for city domestic garbage |
| CN101532667A (en) * | 2008-12-25 | 2009-09-16 | 张圣东 | Efficient burning furnace with rotary fluidization grate |
| CN201325770Y (en) * | 2008-12-25 | 2009-10-14 | 张圣东 | Roller tooth type conveying mechanism |
| CN201513894U (en) * | 2009-03-30 | 2010-06-23 | 丁宝太 | Combined-type flue gas device for dangerous waste pyrolysis |
| CN204534595U (en) * | 2014-12-30 | 2015-08-05 | 湖南金卫环保设备科技有限公司 | The progressive classification pyrolysis installation of the rubbish preventing bioxin from generating |
-
2015
- 2015-08-22 CN CN201510518454.2A patent/CN106468432B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2043710U (en) * | 1989-03-09 | 1989-08-30 | 崔克勤 | Helical propelling continuous incinerator of refuse |
| CN1687646A (en) * | 2005-05-21 | 2005-10-26 | 郭炜明 | Thermal cracking gasification oven for city domestic garbage |
| CN101532667A (en) * | 2008-12-25 | 2009-09-16 | 张圣东 | Efficient burning furnace with rotary fluidization grate |
| CN201325770Y (en) * | 2008-12-25 | 2009-10-14 | 张圣东 | Roller tooth type conveying mechanism |
| CN201513894U (en) * | 2009-03-30 | 2010-06-23 | 丁宝太 | Combined-type flue gas device for dangerous waste pyrolysis |
| CN204534595U (en) * | 2014-12-30 | 2015-08-05 | 湖南金卫环保设备科技有限公司 | The progressive classification pyrolysis installation of the rubbish preventing bioxin from generating |
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Effective date of registration: 20201210 Address after: Room 1610, 16 / F, headquarters building, Changsha China Power Software Park, 39 Jianshan Road, high tech Development Zone, Changsha, Hunan Province (cluster registration) Patentee after: CHANGSHA CHAOFAN ENVIRONMENT TECHNOLOGY Co.,Ltd. Address before: 2nd floor, Yinxin garden, Lufeng Town, Xupu County, Huaihua City, Hunan Province Patentee before: HUNAN JINWEI ENVIRONMENTAL PROTECTION EQUIPMENT Co.,Ltd. |
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