CN113477662A - Method for low-temperature pyrolysis of organic solid waste and generating device thereof - Google Patents
Method for low-temperature pyrolysis of organic solid waste and generating device thereof Download PDFInfo
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- 238000000197 pyrolysis Methods 0.000 title claims abstract description 169
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- 238000000034 method Methods 0.000 title claims abstract description 45
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- 239000003546 flue gas Substances 0.000 claims abstract description 75
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- Incineration Of Waste (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a low-temperature pyrolysis method and a generating device for organic solid waste, and belongs to the technical field of solid waste treatment. The method for low-temperature pyrolysis of the organic solid waste comprises the following steps: carrying out dehydration-preheating-carbonization treatment on organic solid waste, wherein the organic solid waste is preheated to 150-200 ℃ after dehydration; the carbonization treatment is to further carbonize the preheated organic solid waste to obtain combustible flue gas and ash, wherein the carbonization treatment temperature is 300-450 ℃, and open fire is not generated in the carbonization process. The organic solid waste is treated by a specific low-temperature pyrolysis process, so that the low-temperature pyrolysis reaction is ensured, the compounds containing carbon, hydrogen and oxygen in the organic solid waste are reduced into combustible components such as hydrocarbon, carbon monoxide, carbon black, hydrogen, oxygen and the like, high-concentration combustible gas is obtained by pyrolysis, the volume ratio of the combustible components is more than 50%, and the generation of harmful substances such as dioxin, nitrogen oxide and the like to the environment in the low-temperature pyrolysis process is reduced.
Description
Technical Field
The invention relates to the technical field of solid waste treatment, in particular to a method for low-temperature pyrolysis of organic solid waste and a generating device thereof.
Background
In the field of solid waste treatment, organic solid waste is mainly divided into biomass solid waste and petroleum derivative solid waste, and is mainly compounds of C (carbon), H (hydrogen) and O (oxygen) in terms of components. At present, three main methods for treating solid wastes include landfill, volume reduction treatment (combustion) and preparation of biomass recyclable products (compost or preparation of fuel rods). The landfill causes excessive pollution to the environment, occupies a large amount of land, influences the living environment of residents and causes that projects are difficult to land. The prepared biomass recyclable product has strict requirements on components of solid wastes, needs a large amount of other auxiliary materials, has high input cost, is easy to cause subsequent pollution, and has low actual operability. The treatment of reducing volume can effectively solve the problem of the existing refuse surrounding, and is a promising solid waste treatment direction at present. In the process of reducing the volume of organic solid wastes, pyrolysis and low-temperature pyrolysis are mainly adopted at present, the pyrolysis is incineration treatment, but the waste incineration still needs a large amount of land, the waste stacking and the waste transfer need a large amount of energy consumption, a large amount of odor is generated, and secondary pollution can be generated. Low temperature pyrolysis has many advantages over pyrolysis: the layer-by-layer transfer of the garbage is reduced; the equipment is miniaturized without large land acquisition; during combustion, stirring is not needed, no raise dust is generated, and a large amount of dioxin, nitrogen oxide, sulfur dioxide and dust containing heavy metal compounds are not generated in the combustion process.
However, the secondary combustion of the current low-temperature pyrolysis technology still needs a large amount of energy consumption, and high-concentration combustible flue gas which can be spontaneously combusted or ignited to be combusted is not obtained through the low-temperature pyrolysis treatment of solid waste. CN107245435A discloses a device and a method for methane production by pyrolysis-biochemical coupling of difficult biochemical solid waste, the difficult biochemical solid waste enters a medium temperature pyrolysis chamber through a closed continuous feeding device for medium temperature pyrolysis, materials are converted into volatile gas and biochar, the biochar is directly discharged into a water cooling jacket storage box from a greenhouse in a pyrolysis furnace, the volatile gas directly enters a high temperature catalysis chamber of the pyrolysis furnace for further catalytic pyrolysis into high temperature pyrolysis mixed gas mainly containing hydrogen and carbon monoxide, the high temperature pyrolysis mixed gas is subjected to temperature reduction gas-liquid separation through a gas-liquid separation and cooler, the generated non-condensable gas and pyrolysis water containing water-soluble organic matters respectively enter a biological methane production reactor in different forms, and the gas components such as hydrogen and carbon monoxide of the pyrolysis gas and the water-soluble organic matters in the pyrolysis water are converted into methane through the action of microorganisms, thereby realizing the high-quality clean resource utilization of the methane converted from the organic solid wastes difficult to be biochemically generated. The method can realize the conversion and utilization of the organic solid waste only by medium-temperature pyrolysis and high-temperature catalytic pyrolysis treatment and a special biological methane production reactor, has complex process and high energy consumption of the whole process, and cannot directly pyrolyze the organic solid waste into high-concentration combustible gas at low temperature.
Disclosure of Invention
The invention aims to solve the technical problems that the existing organic solid waste low-temperature pyrolysis treatment technology still needs secondary combustion, has high energy consumption and cannot obtain high-concentration combustible flue gas capable of spontaneous combustion or low-energy combustion through low-temperature pyrolysis, and provides a method for low-temperature pyrolysis of organic solid waste.
The invention also aims to provide a generating device for low-temperature pyrolysis of organic solid wastes.
The above purpose of the invention is realized by the following technical scheme:
the method for low-temperature pyrolysis of organic solid waste comprises the steps of carrying out dehydration preheating, carbonization and ashing treatment on the organic solid waste;
wherein the organic solid waste dehydration and preheating treatment is to preheat the organic solid waste to 150-200 ℃ for 30-60 min;
the carbonization treatment is to further carbonize the preheated organic solid waste to obtain combustible flue gas and ash, wherein the carbonization treatment temperature is 300-450 ℃, the carbonization treatment time is 30-60 min, and open fire is not generated in the carbonization process. Wherein, it is required to be noted that:
organic solid waste enters a pyrolysis device through closed feeding, and is subjected to dehydration treatment at the temperature of 100 ℃ until the water content is 30-50%, and the organic solid waste is discharged from a gas outlet after water evaporation;
organic solid waste after dehydration continuously rises to 150-200 ℃ for preheating treatment, preheating is carried out for more quickly entering a pyrolysis carbonization state, carbonization lead time is reduced, and the temperature of a carbonization zone can be more uniform and stable.
The organic solid waste pyrolysis process of the invention does not generate open fire, and avoids the combustion process, because C, H, O, Cl and the like generate dioxin on the surface of fly ash through reaction or under the catalytic action of heavy metal ions during open fire combustion.
After a certain temperature is reached, the organic solid waste is pyrolyzed at a low temperature (the material is carbonized without open fire) in the pyrolysis device, the material is cracked by the carbonized heat energy to form a reduction reaction, compounds containing C (carbon), H (hydrogen) and O (oxygen) in the solid waste are reduced into hydrocarbon, carbon monoxide, carbon black, hydrogen, oxygen and the like, and the reduction reaction is mainly carried out, so the volume of the formed carbon dioxide is less, and the volume of combustible components in the formed mixed gas is higher by the residual oxygen which is not fully reacted, and the mixed gas has a very low oxygen index, is combustible and does not need secondary combustion treatment with large energy consumption.
The organic solid waste comprises industrial oil cotton cloth, domestic garbage and medical garbage.
The medium-temperature pyrolysis temperature is controlled to be 300-450 ℃, for example, 350 ℃, 410 ℃ and 420 ℃.
Preferably, the temperature of the combustible flue gas is 100-180 ℃. For example, the temperature may be 150 ℃, 160 ℃ and 170 ℃.
The condition for synthesizing dioxin from flue gas is that the temperature is about 300 ℃, the components of the flue gas contain Cl ions, and the temperature of the discharged combustible flue gas is controlled to be 100-180 ℃, so that the synthesis of dioxin can be avoided.
In addition, the temperature of the combustible flue gas obtained by carbonization is about 100-180 ℃, if the carbonization temperature is too high, the temperature of the obtained flue gas can be obviously increased to 300 ℃, so that dioxin components can be generated, open fire combustion can be caused even if the carbonization temperature is too high, the temperature of the flue gas discharged after combustion cannot be controlled below 300 ℃, and therefore the temperature of the discharged combustible flue gas needs to be controlled within the range of the invention and also needs to be cooperatively controlled.
Preferably, the volume content of oxygen in the combustible flue gas is 13-14%.
The combustible flue gas finally obtained by the invention has high combustible component content, and because the overall temperature is controlled in a lower range to carry out low-temperature pyrolysis reaction, nitrogen components in the air are not reduced to form nitric oxides (the forming temperature of oxynitride is about 1000 ℃), the whole low-temperature pyrolysis process is reduction reaction, the proportion of generated carbon dioxide is also lower, dioxin components are hardly generated, the oxygen index of the combustible flue gas is below 5%, and the high-quality combustible flue gas can be obtained.
The oxygen content of the obtained combustible flue gas is 13-14%, the oxygen content is an important index of emission (GB18485-2014 domestic garbage incineration pollution control standard 3.18), the oxygen index of the outlet flue gas is low, fresh air (oxygen) does not need to be supplied in the subsequent combustible tail gas treatment process (combustion), the subsequent addition can play a negative role in cooling the combustion process because the temperature of the fresh air is low, and once the temperature is reduced, the reaction speed is reduced, so that stable combustion cannot be maintained.
The invention also specifically protects a generating device for realizing the low-temperature pyrolysis of the organic solid waste, which comprises a pyrolysis cavity, a pyrolysis layer temperature measuring device, a flue gas temperature measuring device, a controllable air inlet and a smoke outlet, wherein the flue gas temperature measuring device and the smoke outlet are arranged at the upper part of the pyrolysis cavity and are used for detecting the temperature of combustible flue gas; the pyrolysis layer temperature measuring device is arranged at the middle lower part of the pyrolysis cavity and is used for detecting the temperature of preheating and carbonization treatment; the controllable air inlet is arranged at the lower part of the pyrolysis cavity and is used for adjusting the temperature of preheating and carbonization treatment and the temperature of combustible flue gas.
Wherein, it is required to be noted that:
in the generating device, organic solid waste is fed from the upper end of the generating device and is fed into a pyrolysis cavity, the bottom of the pyrolysis cavity is ignited, the organic solid waste starts to be heated, evaporated and dehydrated after ignition until the water content is about 30-50%, the temperature in the furnace continuously rises to generate organic solid waste preheating reaction, the preheating temperature is detected by a pyrolysis layer temperature measuring device to reach 150-200 ℃, meanwhile, the organic solid waste is continuously fed from the upper end of the generating device, newly-fed organic solid waste is coated on the outer layer of the organic solid waste which is preheated to 150-200 ℃, the evaporation and dehydration reaction is generated, and water is discharged from a gas outlet. Meanwhile, the temperature in the furnace is continuously increased to 300-450 ℃, the organic solid waste is preheated to perform low-temperature pyrolysis reaction, the organic solid waste is further subjected to carbonization reaction to obtain combustible flue gas, the combustible flue gas is discharged from a gas outlet, the residual substances are subjected to ashing reaction in the furnace, the generated ash is discharged from the bottom of a pyrolysis cavity, and in the whole carbonization process, the whole reaction process is controlled by the air inlet amount of the controllable air inlet to avoid open fire.
When the organic solid waste which is fed at the beginning is subjected to low-temperature pyrolysis, the organic solid waste new material which enters subsequently is dehydrated and enters a preheating stage, the organic solid waste which continuously enters is continuously coated on the outer layer of the preheated organic solid waste to generate dehydration reaction, and the whole treatment process can be continuously carried out by continuously feeding.
Ignition temperature rise is kept in the whole dehydration-preheating-carbonization process, subsequent organic solid waste is continuously fed from the upper end of the generating device, low-temperature carbonization heat generated in the furnace body can be continuously and reversely supplied to the preheating and dehydration procedures, namely, ignition treatment is not needed, the whole reaction process can be continuously carried out, ignition is not needed, and energy consumption is greatly reduced.
In the device for producing combustible flue gas by low-temperature pyrolysis of organic solid waste, the pyrolysis cavity is used for carrying out low-temperature pyrolysis reaction on the whole organic solid waste, under the condition that the organic solid waste fed from the upper end is ignited in the pyrolysis furnace, the organic solid waste is subjected to low-temperature pyrolysis (spontaneous combustion of the ignited material) in the pyrolysis furnace, and through the processes of dehydration, preheating, carbonization and ashing, compounds containing C (carbon), H (hydrogen) and O (oxygen) in the organic solid waste are reduced to produce combustible gas components such as hydrocarbon, carbon monoxide, carbon black, hydrogen, oxygen and the like, and the combustible gas components enter the next treatment process through the smoke outlet, so that ash falls into the lower part of the pyrolysis cavity and is discharged.
The pyrolysis layer temperature measuring device can be a pyrolysis layer thermocouple and is used for detecting temperature field temperatures of different temperatures required by drying, preheating and carbonizing processes in the pyrolysis cavity.
The flue gas temperature measuring device can be a flue gas thermocouple and is used for detecting the temperature of the discharged high-concentration combustible flue gas.
The pyrolysis combustible gas with too high pyrolysis temperature and discharge too high temperature can all produce the harmful substance in environment that is unfavorable for discharging, can reduce the production of harmful substance in environment such as dioxin, nitrogen oxide in the low temperature pyrolysis in-process through control pyrolysis temperature field temperature and the temperature of discharge combustible gas.
The device also comprises a controller which is electrically connected with the flue gas temperature measuring device, the pyrolysis layer temperature measuring device and the controllable air inlet.
The temperature detection results of the flue gas temperature measuring device (flue gas thermocouple) and the pyrolysis layer temperature measuring device (pyrolysis layer thermocouple) are fed back to the controller, and the opening and closing degree of the controllable air inlet is directly controlled through the controller.
The low-temperature pyrolysis temperature of the invention is jointly controlled by the pyrolysis layer thermocouple, the flue gas thermocouple and the controllable air inlet, the corresponding temperatures are detected by the thermocouples arranged on the pyrolysis layer and the flue gas layer, and the temperature is reversely corroded to the controller to control the fresh air inflow (the opening degree of the controllable air inlet).
The temperature detection result through the thermocouple can control the entering amount of air in the low-temperature pyrolysis process to guarantee that the temperature field of whole pyrolysis cavity is even stable, prevent the high temperature, and also can jointly control, prevent to take place the naked light burning, produce the harmful substance that is unfavorable for the emission.
Preferably, the number of the flue gas temperature measuring devices is more than or equal to 2. The adoption of a plurality of thermocouples for flue gas temperature control is a double-insurance measure for preventing the thermocouples from being damaged on one hand, and on the other hand, the arithmetic mean of more than two thermocouples is used as the real control temperature, so that the actual outlet flue gas temperature can be more accurately detected. In addition, in the actual operation process, if the difference between the detection values of the two thermocouples is large, the control system can give an alarm to prompt an operator to overhaul, and the safe and stable operation of the device is facilitated.
Preferably, the number of the pyrolysis layer temperature measuring devices is more than or equal to 4. The actual reaction temperature in the pyrolysis cavity can be detected more accurately by detecting the 4 thermocouples distributed around the pyrolysis cavity.
In order to further control the uniform stability of the temperature field of the drying, preheating, carbonization, etc. reaction of the whole low-temperature pyrolysis, it is preferable that the 4 pyrolysis layer thermocouples detect the temperature at 1/2 radius and 1/4 radius from the center position of the pyrolysis chamber, respectively.
Preferably, the controllable air inlet is divided into an upper layer and a lower layer which are uniformly distributed around the pyrolysis cavity in a staggered manner. Each air inlet may be independently controlled or group controlled.
Further preferably, the number of the controllable air inlets is 16, and the upper layer and the lower layer are 8 respectively.
Further preferably, there are 4 controllable air inlets per group. The marshalling control of a plurality of air inlets of upper and lower two rows can realize the even control of the whole furnace internal temperature, and the dispersed air inlet is more favorable for even temperature control.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a device for generating combustible flue gas by low-temperature pyrolysis of organic solid waste and a low-temperature pyrolysis method, wherein a pyrolysis layer thermocouple, a flue gas thermocouple and a controllable air inlet are arranged in a pyrolysis cavity, the temperature of temperature fields with different temperatures required by drying, preheating, carbonizing and ashing processes generated in the pyrolysis cavity is detected by the pyrolysis layer thermocouple, the flue gas thermocouple is used for detecting the temperature of discharged high-concentration combustible flue gas, the pyrolysis layer thermocouple, the flue gas thermocouple and the controllable air inlet are combined to control the low-temperature pyrolysis temperature, the generation of environment harmful substances such as dioxin, nitrogen oxide and the like in the low-temperature pyrolysis process is reduced, the low-temperature pyrolysis reaction is ensured, compounds containing carbon, hydrogen and oxygen in the organic solid waste are reduced into combustible components such as hydrocarbon, carbon monoxide, carbon black, hydrogen, oxygen and the like, and high-concentration gas is obtained by pyrolysis, the volume percentage of the combustible components is more than 50 percent, and the generation of harmful substances to the environment, such as dioxin, nitrogen oxide and the like in the low-temperature pyrolysis process is reduced.
The mixed gas formed by the low-temperature pyrolysis method of the organic solid waste has high combustible component proportion, the oxygen volume content of combustible flue gas is 13-14%, and the combustible flue gas is combustible and does not need secondary combustion treatment with high energy consumption.
The low-temperature pyrolysis treatment method for the organic solid waste can effectively realize volume reduction treatment of the organic solid waste, and the ash content after the organic solid waste treatment is only 5-10 per mill of the volume content of the original organic solid waste.
Drawings
Fig. 1 is a schematic structural diagram of a device for producing combustible flue gas by low-temperature pyrolysis of organic solid waste.
FIG. 2 is a process flow diagram of the low temperature pyrolysis of organic solid waste of the present invention.
Detailed Description
The present invention will be further described with reference to specific embodiments, but the present invention is not limited to the examples in any way. The starting reagents employed in the examples of the present invention are, unless otherwise specified, those that are conventionally purchased.
Example 1
The utility model provides a device that organic solid useless low temperature pyrolysis produced combustible flue gas, as shown in figure 1, the device includes pyrolysis cavity 1, pyrolysis layer thermocouple 2, flue gas thermocouple 3, controllable air inlet 4 and exhaust port 5, and flue gas thermocouple 3 and exhaust port 5 set up on the upper portion of pyrolysis cavity 1, and pyrolysis layer thermocouple 2 sets up the well lower part at pyrolysis cavity 1, and controllable air inlet 4 sets up in the lower part of pyrolysis cavity 1, and in the lower part of pyrolysis layer thermocouple.
The device for generating combustible flue gas by low-temperature pyrolysis of organic solid waste is a pyrolysis furnace 6, and an ignition device and an ash discharge port are arranged at the lower part of the pyrolysis furnace.
The device also comprises a controller, wherein the controller is electrically connected with the flue gas thermocouple, the pyrolysis layer thermocouple and the controllable air inlet, the temperature detection results of the flue gas thermocouple and the pyrolysis layer thermocouple are fed back to the controller, and the opening degree of the controllable air inlet is directly controlled by the controller.
The number of the flue gas thermocouples is 2.
The number of the pyrolysis layer thermocouples is 4, and the 4 pyrolysis layer thermocouples respectively detect the temperature at 1/4 radius and 1/2 radius from the center of the pyrolysis cavity.
The number of the controllable air inlets is 16, the upper layer and the lower layer are respectively 8, and the controllable air inlets are staggered and uniformly distributed around the pyrolysis cavity.
Example 2
An organic solid waste low-temperature pyrolysis method based on a generating device for organic solid waste low-temperature pyrolysis is shown in fig. 2, and comprises the following steps:
s1, igniting a pyrolysis furnace, and dehydrating organic solid waste in a pyrolysis cavity;
s2, preheating the dehydrated organic matters to be below 200 ℃, naturally and continuously heating organic solid wastes in the pyrolysis furnace for low-temperature pyrolysis, ensuring that no open fire is generated in the pyrolysis process, performing low-temperature pyrolysis carbonization to obtain combustible flue gas,
wherein the low-temperature pyrolysis temperature is 420 ℃.
Wherein the temperature of the obtained combustible flue gas is 170 ℃, and the oxygen volume content of the combustible flue gas is 13%.
Wherein the organic solid waste of the embodiment 2 is industrial oil cotton cloth, and the main component is C, H, O.
The device for producing combustible flue gas by low-temperature pyrolysis of organic solid waste can realize effective volume reduction of the organic solid waste by low-temperature pyrolysis of the organic solid waste, and the content of ash obtained by final treatment is only 5-10 per mill of the volume content of the original organic solid waste.
The combustible flue gas discharged after the low-temperature pyrolysis of the organic solid waste comprises the following main components in percentage by weight as shown in the following table 1:
TABLE 1
| Composition (I) | N2 | O2 | CnHm | CO | CO2 | H2O | H2 | C | Others |
| Content (wt.) | 32 | 13 | 21 | 19 | 5 | 8 | 0.5 | 1 | 0.5 |
Example 3
An organic solid waste low-temperature pyrolysis method based on a generating device for organic solid waste low-temperature pyrolysis is shown in fig. 2, and comprises the following steps:
s1, igniting a pyrolysis furnace, and drying and dehydrating organic solid wastes in a pyrolysis cavity;
s2, preheating the dehydrated organic matters to be below 200 ℃, naturally and continuously heating organic solid wastes in the pyrolysis furnace for low-temperature pyrolysis, ensuring that no open fire is generated in the combustion process, performing low-temperature pyrolysis carbonization to obtain combustible flue gas,
wherein the low-temperature pyrolysis temperature is 350 ℃.
Wherein the temperature of the obtained combustible flue gas is 150 ℃, and the oxygen volume content of the combustible flue gas is 14%.
Wherein the organic solid waste of the embodiment 3 is domestic garbage, and the main component is C, H, O.
The device for producing combustible flue gas by low-temperature pyrolysis of organic solid waste can realize effective volume reduction of the organic solid waste by low-temperature pyrolysis of the organic solid waste, and the content of ash obtained by final treatment is only 5-10 per mill of the volume content of the original organic solid waste.
The main components and contents of the combustible flue gas discharged after the low-temperature pyrolysis of the organic solid waste are as follows in table 2:
TABLE 2
| Composition (I) | N2 | O2 | CnHm | CO | CO2 | H2O | H2 | C | Others |
| Content (wt.) | 27 | 14 | 20 | 18 | 6 | 13 | 0.2 | 1.3 | 0.5 |
Example 4
An organic solid waste low-temperature pyrolysis method based on a generating device for organic solid waste low-temperature pyrolysis is shown in fig. 2, and comprises the following steps:
s1, igniting a pyrolysis furnace, and drying and dehydrating organic solid wastes in a pyrolysis cavity;
s2, preheating the dehydrated organic matters to be below 200 ℃, naturally and continuously heating organic solid wastes in the pyrolysis furnace for low-temperature pyrolysis, ensuring that no open fire is generated in the combustion process, performing low-temperature pyrolysis carbonization to obtain combustible flue gas,
wherein the low-temperature pyrolysis temperature is 410 ℃.
Wherein the temperature of the obtained combustible flue gas is 160 ℃, and the oxygen volume content of the combustible flue gas is 14%.
The organic solid waste of example 4 is medical waste, and the main component is C, H, O.
The device for producing combustible flue gas by low-temperature pyrolysis of organic solid waste can realize effective volume reduction of the organic solid waste by low-temperature pyrolysis of the organic solid waste, and the content of ash obtained by final treatment is only 5-10 per mill of the volume content of the original organic solid waste.
The main components and contents of the combustible flue gas discharged after the low-temperature pyrolysis of the organic solid waste are as follows in table 3:
TABLE 3
| Composition (I) | N2 | O2 | CnHm | CO | CO2 | H2O | H2 | C | Others |
| Content (wt.) | 33 | 14 | 20 | 18 | 4.5 | 8.5 | 0.2 | 0.9 | 0.9 |
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The method for low-temperature pyrolysis of organic solid waste is characterized in that the organic solid waste is subjected to dehydration preheating-carbonization-ashing treatment,
wherein the organic solid waste dehydration and preheating treatment is to preheat the organic solid waste to 150-200 ℃ for 30-60 min;
the carbonization treatment is to further carbonize the preheated organic solid waste to obtain combustible flue gas and ash, wherein the carbonization treatment temperature is 300-450 ℃, the carbonization treatment time is 30-60 min, and open fire is not generated in the carbonization process.
2. The method for low-temperature pyrolysis of organic solid waste according to claim 1, wherein the temperature of the combustible flue gas is 100 to 180 ℃.
3. The method for low-temperature pyrolysis of organic solid waste according to claim 2, wherein the combustible flue gas has an oxygen content of 13-14% by volume.
4. The generating device for low-temperature pyrolysis of organic solid waste according to any one of claims 1 to 3, characterized by comprising a pyrolysis cavity (1), a pyrolysis layer temperature measuring device (2), a flue gas temperature measuring device (3), a controllable air inlet (4) and a smoke outlet (5), wherein the flue gas temperature measuring device (3) and the smoke outlet (5) are arranged at the upper part of the pyrolysis cavity (1) and used for detecting the temperature of combustible flue gas; the pyrolysis layer temperature measuring device (2) is arranged at the middle lower part of the pyrolysis cavity (1) and is used for detecting the temperature of preheating and carbonization treatment; the controllable air inlet (4) is arranged at the lower part of the pyrolysis cavity (1) and is used for adjusting the temperature of preheating and carbonization treatment and the temperature of combustible flue gas.
5. The apparatus for generating low-temperature pyrolysis of organic solid wastes according to claim 4, further comprising a controller electrically connected to the flue gas temperature measuring device, the pyrolysis layer temperature measuring device and the controllable gas inlet.
6. The apparatus for generating low-temperature pyrolysis of organic solid wastes according to claim 1, wherein the number of the flue gas temperature measuring devices is more than or equal to 2.
7. The apparatus for generating low-temperature pyrolysis of organic solid wastes according to claim 1, wherein the number of the pyrolysis layer temperature measuring devices is not less than 4.
8. The apparatus for generating low-temperature pyrolysis of organic solid wastes according to claim 7, wherein the number of the pyrolysis layer temperature measuring devices is 4, and the 4 pyrolysis layer temperature measuring devices respectively detect the temperature at 1/2 radius and 1/4 radius from the center of the pyrolysis chamber.
9. The apparatus for generating low-temperature pyrolysis of organic solid wastes according to claim 4, wherein the controllable air inlets are divided into an upper layer and a lower layer which are distributed around the pyrolysis cavity in a staggered manner.
10. The apparatus for generating low-temperature pyrolysis of organic solid wastes according to claim 9, wherein the number of the controllable air inlets is 16, and the upper layer and the lower layer are 8 respectively.
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