Skid-mounted system for efficiently combusting biomass and preparing biochar from waste heat

Abstract

The invention provides a skid-mounted biomass efficient combustion and waste heat biochar preparation system which comprises a combustion furnace and further comprises at least one pyrolyzing furnace, the pyrolyzing furnace is used for pyrolyzing biomass filled in the pyrolyzing furnace, a heat energy conveying pipe penetrating through the pyrolyzing furnace in a sealed mode is arranged in the pyrolyzing furnace, the heat energy conveying pipe is communicated with the combustion furnace, and the heat energy conveying pipe is communicated with the combustion furnace. The heat energy conveying pipe is used for conveying heat generated by aerobic combustion of the combustion furnace into the pyrolyzing furnace; the water heater is provided with a heating cavity, and the heating cavity communicates with the heat energy conveying pipe through a first heat conveying pipe. The gas recycling and biomass oil separating unit comprises a tubular heat exchanger which is communicated with the pyrolyzing furnace through an exhaust pipe and is used for condensing biomass oil in the high-temperature gas, and a heat exchange pipe in the tubular heat exchanger is connected with a plurality of vertical oil discharge pipes; one end of the gas conveying pipe communicates with the heat exchange pipe, and the other end of the gas conveying pipe communicates with the combustion furnace and is used for conveying the pyrolysis gas to the combustion furnace for recycling. The method realizes efficient recycling of carbon resources, reduces carbon emission, and is energy-saving and environment-friendly.

Description

Technical Field

[0001] The invention relates to the technical field of utilization of waste agricultural and forestry biomass resources, and in particular to a skid-mounted biomass efficient combustion and waste heat production biochar system. Background Art

[0002] The output of abandoned agricultural and forestry biomass in rural areas is large, and most of them are stored, landfilled, returned to the field and incinerated, which not only occupies a large amount of land resources, but also easily causes water, soil and air pollution. However, due to the advantages of biomass such as renewability, carbon neutrality and wide distribution, the use of biomass energy can not only reduce greenhouse gas emissions, but also realize the resource utilization of biomass waste and promote the development of circular economy. After pyrolysis of biomass, three-phase products of biogas, bio-oil and biochar can be generated. If the pyrolysis products can be fully recycled and utilized, it will not only provide clean energy, but also greatly reduce the secondary pollution caused by the unreasonable use of biomass. Therefore, the resource utilization of abandoned agricultural and forestry biomass has become the best solution to solve the hazards caused by the storage, landfill, return to the field and incineration of abandoned agricultural and forestry biomass.

[0003] The treatment of waste agricultural and forestry biomass requires the use of pyrolysis devices to realize the resource utilization of waste agricultural and forestry biomass. These pyrolysis devices all produce biochar by high-temperature carbonization of waste agricultural and forestry biomass sent into the combustion furnace of the pyrolysis device under oxygen-free or oxygen-deficient conditions, and the pyrolysis gas generated by pyrolysis in the pyrolysis device is sent to the aerobic combustion heating furnace in the heating box through the pyrolysis gas transmission pipeline. However, in order to ensure that the pyrolysis gas generated by pyrolysis does not block the pyrolysis gas transmission pipeline, it is necessary to drive the pyrolysis furnace to rotate with a motor to make the waste agricultural and forestry biomass fully burn and minimize the impurities mixed in the pyrolysis gas. However, since the pyrolysis gas contains biomass oil, directly burning it aerobically will also affect the full utilization of biomass oil. In addition, the pyrolysis device is an exothermic reaction, and a large amount of heat is directly discharged, which also makes the waste heat not fully utilized. Furthermore, using a motor to drive the pyrolysis furnace to rotate will also generate a lot of energy consumption. Therefore, a small skid-mounted biomass efficient combustion and waste heat biochar production system that can prepare biochar, recover bio-oil, produce gas for reuse, and utilize waste heat without the need for electricity supply is designed. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a skid-mounted biomass efficient combustion and waste heat biochar production system, which aims to solve the problems raised in the technical background. Without the need for electricity supply, it can effectively solve the problem of high energy consumption, improve the utilization rate of biomass, effectively recover biochar and bio-oil, and make efficient use of waste heat and reuse pyrolysis gas. It provides an effective disposal method for agricultural and forestry waste biomass, realizes efficient recycling of carbon resources, thereby reducing carbon emissions and saving energy and protecting the environment.

[0005] In order to solve the above technical problems, the implementation scheme provided by the present invention is to provide a skid-mounted biomass efficient combustion and waste heat biochar production system, including a combustion furnace for aerobically burning the biomass fed into the combustion furnace, and also including:

[0006] A pyrolysis furnace, at least one of which is used to pyrolyze the biomass filled in the pyrolysis furnace, wherein the pyrolysis furnace includes a heat energy delivery pipe which is sealed and passes through the pyrolysis furnace, and the heat energy delivery pipe is connected to the combustion furnace, and the heat energy delivery pipe is used to deliver the heat generated by the aerobic combustion of the combustion furnace into the pyrolysis furnace, so as to provide heat for the oxygen-free or oxygen-deficient pyrolysis of the biomass in the pyrolysis furnace;

[0007] The water heater has a heating chamber, and the heating chamber is connected to the heat energy transmission pipe through a first heat transmission pipe;

[0008] Gas recovery and biomass oil separation unit, including:

[0009] The tubular heat exchanger is connected to the pyrolysis furnace through an exhaust pipe and is used to condense the biomass oil in the high-temperature gas. The heat exchange tubes in the tubular heat exchanger are connected to a plurality of vertical oil discharge pipes.

[0010] The gas delivery pipe has one end connected to the heat exchange pipe and the other end connected to the combustion furnace, and is used to deliver the pyrolysis gas to the combustion furnace for reuse.

[0011] Preferably, a carbon dioxide filter is connected between the heat exchange tube and the gas delivery tube.

[0012] Preferably, a gas collecting tank is connected between the carbon dioxide filter and the gas delivery pipe, a first valve is provided on the gas delivery pipe and the exhaust pipe, and a filter screen is provided on the inner wall of the pyrolysis furnace.

[0013] Preferably, an ignition device is provided inside the combustion furnace, and the ignition device is connected to the output end of the gas delivery pipe.

[0014] Preferably, a drying furnace is further provided between the pyrolysis furnace and the hot water boiler, and the drying furnace is used to pre-dry the biomass pyrolyzed in the pyrolysis furnace. The hot water boiler is connected to a water vapor exhaust pipe, and a second valve is provided on the water vapor exhaust pipe. The drying furnace includes a second heat transfer pipe that is sealed and passes through the drying furnace, one end of the second heat transfer pipe is connected to the heat energy transfer pipe, and the other end of the second heat transfer pipe is connected to the first heat transfer pipe.

[0015] Preferably, there are two pyrolysis furnaces, and the two pyrolysis furnaces are a first pyrolysis furnace and a second pyrolysis furnace, the first pyrolysis furnace includes a first heat energy transport pipe that is sealed and passes through the first pyrolysis furnace, the second pyrolysis furnace includes a second heat energy transport pipe that is sealed and passes through the second pyrolysis furnace, and one end of the first heat energy transport pipe is connected to the combustion furnace, the other end of the first heat energy transport pipe is connected to one end of the second heat energy transport pipe, and the other end of the second heat energy transport pipe is connected to the first heat transfer pipe.

[0016] Preferably, the pyrolysis furnace further comprises a hollow cylindrical furnace body, the heat transport pipe is arranged in the cylindrical furnace body along the transverse axis of the cylindrical furnace body, and the biomass is filled in the biomass pyrolysis zone between the cylindrical furnace body and the tube wall of the heat transport pipe.

[0017] Preferably, a wood-burning stove is provided on the top of the pyrolysis furnace, and a baking chamber is also provided on the top outer wall of the pyrolysis furnace.

[0018] Preferably, a biochar collection box is provided at the bottom of the pyrolysis furnace.

[0019] The skid-mounted biomass efficient combustion and waste heat biochar production system proposed in the present invention has particularly significant technical advantages and innovative effects compared to the prior art, specifically:

[0020] (1) The system disclosed in the present invention is a skid-mounted pyrolysis device that can prepare biomass into biochar and recover bio-oil, and can also reuse pyrolysis gas and waste heat from combustion. Heat energy is generated by burning biomass and transmitted to the pyrolysis furnace, drying furnace and hot water boiler through a heat transmission pipe for pyrolysis, drying biomass and boiling water, thereby improving energy utilization and avoiding heat loss. Secondly, the biogas generated by pyrolysis of biomass can be reused in the device for secondary combustion, thereby increasing the combustion heat, improving the efficiency of biomass pyrolysis, and achieving biomass recycling and self-sufficiency. At the same time, the biochar prepared by pyrolysis can be reused for farmland or barren soil improvement, and the generated bio-oil can be used as a green and environmentally friendly fuel. The device of the present invention does not require electricity supply, can effectively solve the problems of low efficiency, high energy consumption and long cycle of traditional processes, improve the efficiency of biomass utilization, provide an effective disposal method for agricultural and forestry waste biomass, and achieve efficient recycling of carbon resources, thereby reducing carbon emissions.

[0021] (2) The present invention uses a plurality of pyrolysis furnaces in series to achieve efficient and low-cost pyrolysis of biomass, thereby improving the efficiency of value-added processing of agricultural straw.

[0022] (3) The present invention is provided with a wood-burning stove and a baking chamber at the combustion furnace, and cooking can be performed using the heat generated by the combustion of biomass; the present invention is provided with a hot water boiler, and the waste heat output by the drying furnace can be reused to boil water, thereby ensuring full utilization of heat and improving energy utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of a skid-mounted biomass efficient combustion and waste heat biochar production system of the present invention.

[0024] Figure 2 Schematic diagram of the structure of the first pyrolysis furnace according to the present invention.

[0025] Description of reference numerals:

[0026] 1. Combustion furnace; 101. Ventilation port; 102. Biomass delivery port; 103. Firewood stove; 104. Baking box; 105. Ash outlet; 106. Biochar collection box; 107. Heat delivery port; 2. First pyrolysis furnace; 201. First skid-mounted sealing cover; 202. First biomass pyrolysis zone; 203. First heat delivery pipe; 204. First exhaust pipe; 205. Sealing strip; 206. First biomass feed port; 207. First filter; 3. Second pyrolysis furnace; 301. Second skid-mounted sealing cover; 302. Second biomass pyrolysis zone; 303. Second heat delivery pipe; 304. Second exhaust pipe; 305. Sealing strip; 306. First biomass feed port; 207. First filter; 6. Second biomass feed port; 307. Second filter screen; 4. Drying furnace; 401. Third skid-mounted sealing cover; 402. Third biomass pyrolysis zone; 403. Second heat transfer pipe; 404. Water vapor discharge pipe; 405. Sealing strip; 406. Third biomass feed port; 407. Third filter screen; 5. Second heat transfer pipe; 501. Fourth skid-mounted port; 6. Hot water boiler; 601. Hot water valve; 602. Water inlet; 7. Hot water collection bottle; 8. Tubular heat exchanger; 801. Vertical oil drain pipe; 9. Oil collecting tank; 10. Carbon dioxide filter; 11. Gas collection tank; 1101. Air inlet; 1102. Exhaust port; 12. Ignition device. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] The inventors found that biomass will produce three-phase products during pyrolysis, among which biochar has strong adsorption capacity and can be used for soil remediation, sewage treatment, etc., while bio-oil and biogas can be used for fuel, power generation, etc. The skid-mounted equipment has a compact structure and occupies a small area, which greatly saves space. At the same time, the skid-mounted equipment also has the advantages of easy overall movement and high equipment reuse rate.

[0029] In view of this, the present invention provides a skid-mounted biomass efficient combustion and waste heat biochar production system, which can effectively solve the problem of high energy consumption, improve biomass utilization, effectively recover biochar and bio-oil, and efficiently utilize waste heat and reuse pyrolysis gas without the need for electricity supply. It provides an effective disposal method for agricultural and forestry waste biomass, realizes efficient recycling of carbon resources, thereby reducing carbon emissions and saving energy and protecting the environment.

[0030] like Figure 1-2 As shown, the present invention provides a skid-mounted biomass efficient combustion and waste heat biochar production system, comprising a combustion furnace 1 for aerobically combusting biomass fed into the combustion furnace 1, and further comprising:

[0031] A pyrolysis furnace, at least one of which is used to pyrolyze the biomass filled in the pyrolysis furnace, wherein the pyrolysis furnace includes a heat energy delivery pipe which is sealed and passes through the pyrolysis furnace, and the heat energy delivery pipe is connected to the combustion furnace 1, and the heat energy delivery pipe is used to deliver the heat generated by the aerobic combustion of the combustion furnace 1 into the pyrolysis furnace, so as to provide heat for the anaerobic or oxygen-poor pyrolysis of the biomass in the pyrolysis furnace;

[0032] The water heater 6 has a heating chamber, and the heating chamber is connected to the heat energy transport pipe through the first heat transport pipe 5;

[0033] Gas recovery and biomass oil separation unit, including:

[0034] The tubular heat exchanger 8 is connected to the pyrolysis furnace through an exhaust pipe and is used to condense the biomass oil in the high-temperature gas. The heat exchange tubes in the tubular heat exchanger 8 are connected to the multi-layer vertical oil discharge pipe 801;

[0035] The gas delivery pipe has one end connected to the heat exchange pipe and the other end connected to the combustion furnace 1, and is used to deliver the pyrolysis gas to the combustion furnace 1 for reuse.

[0036] Specifically, a carbon dioxide filter 10 is connected between the heat exchange tube and the gas delivery tube.

[0037] Specifically, a gas collecting tank 11 is connected between the carbon dioxide filter 10 and the gas delivery pipe, a first valve is provided on the gas delivery pipe and the exhaust pipe, and a filter screen is provided on the inner wall of the pyrolysis furnace.

[0038] The purpose of setting the carbon dioxide filter 10 is to remove carbon dioxide from the biogas, achieve the purpose of purifying the biogas, and increase the calorific value of the biogas to meet the requirements of using it for fuel, power generation, etc.

[0039] The purpose of setting up the gas collection tank 11 is to store the filtered biogas for easy use at any time and to prevent gas loss. If there is no gas collection tower, when people want to end the use of the system, the last biogas produced will be lost.

[0040] Specifically, an ignition device 12 is provided inside the combustion furnace 1, and the ignition device 12 is connected to the output end of the gas delivery pipe. The ignition device 12 is used to ignite the biogas delivered into the combustion furnace 1 by the gas delivery pipe, so as to promote the recovery and reuse of the biogas.

[0041] Specifically, in order to further utilize the waste heat, a drying furnace 4 is further provided between the pyrolysis furnace and the hot water boiler 6. The drying furnace 4 is used to pre-dry the biomass pyrolyzed in the pyrolysis furnace. The hot water boiler 6 is connected to a steam exhaust pipe 404, and a second valve is provided on the steam exhaust pipe 404. The drying furnace 4 includes a second heat transfer pipe 403 that is sealed and passes through the drying furnace 4. One end of the second heat transfer pipe 403 is connected to the heat energy transfer pipe, and the other end of the second heat transfer pipe 403 is connected to the first heat transfer pipe 5.

[0042] A second heat transfer pipe 403 connected to the third skid-mounted sealing cover 401 is provided in the drying furnace 4 along the horizontal axis, and a third biomass pyrolysis zone 402 is formed between the inner wall of the drying furnace 42 and the outer wall of the second heat transfer pipe 403. A third filter screen 407 is provided on the peripheral wall of the drying furnace 4, and a third biomass feed port 406 is provided at one end of the drying furnace 4. A water vapor exhaust pipe 404 is connected to the drying furnace 4.

[0043] Specifically, there are two pyrolysis furnaces, and the two pyrolysis furnaces are a first pyrolysis furnace 2 and a second pyrolysis furnace 3. The first pyrolysis furnace 2 includes a first heat energy transport pipe 203 that is sealed and passes through the first pyrolysis furnace 2. The second pyrolysis furnace 3 includes a second heat energy transport pipe 303 that is sealed and passes through the second pyrolysis furnace 3. One end of the first heat energy transport pipe 203 is connected to the combustion furnace 1, the other end of the first heat energy transport pipe 203 is connected to one end of the second heat energy transport pipe 303, and the other end of the second heat energy transport pipe 303 is connected to the first heat transfer pipe 5.

[0044] Since heat energy decreases during transmission, the temperature at the front end is higher. Therefore, as many pyrolysis furnaces as possible can be set up at the front where the temperature is higher to make full use of the heat. Therefore, two pyrolysis furnaces are set up. If a third pyrolysis furnace is set up afterwards, its internal temperature is low and cannot meet the pyrolysis requirements. Therefore, it is set up as a drying furnace to make full use of the heat.

[0045] Specifically, the pyrolysis furnace also includes a hollow cylindrical furnace body, a heat energy transport pipe is arranged in the cylindrical furnace body along the horizontal axis of the cylindrical furnace body, and the biomass is filled in the biomass pyrolysis zone between the cylindrical furnace body and the tube wall of the heat energy transport pipe. This is because the cylindrical furnace body structure has a large heat exchange area and more complete pyrolysis.

[0046] One end of the cylindrical furnace body is sealed and connected to a skid-mounted sealing cover via a sealing strip 205. If it is the first pyrolysis furnace 2, the end of the first pyrolysis furnace 2 is connected to the first skid-mounted sealing cover 201 via the first sealing strip 205. If it is the second pyrolysis furnace 3, the end of the second pyrolysis furnace 3 is connected to the first skid-mounted sealing cover 301 via a second sealing strip 305.

[0047] A first heat energy delivery pipe 203 connected to the first skid-mounted sealing cover 201 is provided in the first pyrolysis furnace 2 along the horizontal axis, and a first biomass pyrolysis zone 202 is formed between the inner wall of the first pyrolysis furnace 2 and the outer wall of the first heat energy delivery pipe 203. A first filter screen 207 is provided on the peripheral wall of the first pyrolysis furnace 2, a first biomass feed port 206 is provided at one end of the cylindrical furnace body, and a first exhaust pipe 204 is connected to the cylindrical furnace body.

[0048] A second heat energy delivery pipe 303 connected to the second skid-mounted sealing cover 301 is provided in the second pyrolysis furnace 3 along the horizontal axis, and a second biomass pyrolysis zone 302 is formed between the inner wall of the second pyrolysis furnace 3 and the outer wall of the second heat energy delivery pipe 303. A second filter screen 307 is provided on the peripheral wall of the second pyrolysis furnace 3. A second biomass feed port 306 is provided at one end of the cylindrical furnace body, and a second exhaust pipe 304 is connected to the cylindrical furnace body.

[0049] Specifically, a firewood stove 103 is provided on the top of the pyrolysis furnace, and a baking chamber 104 is provided on the top outer wall of the pyrolysis furnace. The heat energy generated by the combustion furnace 1 provides heat for the firewood stove 103 and the baking chamber 104 for cooking.

[0050] Specifically, a biochar collection box 106 is provided at the bottom of the pyrolysis furnace for collecting biochar.

[0051] Example

[0052] like Figure 1-2 As shown, biomass enters the combustion furnace 1 from the biomass delivery port 102 and burns with the gas (the gas can be air or oxygen) delivered into the combustion furnace 1 from the ventilation port 101, and the heat energy generated provides heat for the wood stove 103 and the baking chamber 104 for cooking. In addition, the biochar generated by the combustion process is discharged from the ash outlet 105 and collected in the biochar collection box 106.

[0053] Since there are two pyrolysis furnaces, namely the first pyrolysis furnace 2 and the second pyrolysis furnace 3, and the first pyrolysis furnace 2 and the second pyrolysis furnace 3 are connected by the first heat energy delivery pipe 203 and the second heat energy delivery pipe 303, the hot gas generated by the combustion of the combustion furnace 1 is sent into the first heat energy delivery pipe 203 connected to the first pyrolysis furnace 2 through the heat energy delivery port 107, which is used to provide pyrolysis heat for the biomass filled in the first biomass pyrolysis zone 202 between the inner wall of the first pyrolysis furnace 2 and the first heat energy delivery pipe 203, and biomass oil and gas containing components such as CO, H2 and CH4 are generated after pyrolysis, and the hot gas generated by the combustion of the combustion furnace 1 is sent into the second heat energy delivery pipe 3 through the first heat energy delivery pipe 203. 03, which is used to provide pyrolysis heat for the biomass in the first biomass pyrolysis zone 302 filled between the inner wall of the first pyrolysis furnace 2 and the first heat energy delivery pipe 203, and produce biomass oil and gas containing components such as CO, H2 and CH4 after pyrolysis, while the second pyrolysis furnace 3 is connected to the drying furnace 4 through the second heat delivery pipe 402, which is used to deliver the hot gas generated by the combustion of the combustion furnace 1 into the second heat delivery pipe 402 through the first heat energy delivery pipe 203 and the second heat energy delivery pipe 303, and it is used to provide drying heat for the biomass in the third biomass pyrolysis zone 402 filled between the inner wall of the first pyrolysis furnace 2 and the first heat energy delivery pipe 203, and the water vapor after drying is discharged from the water vapor discharge pipe 404.

[0054] The pyrolysis gas generated by pyrolysis in the first pyrolysis furnace 2 and the second pyrolysis furnace 3 has a high pyrolysis temperature, and the generated pyrolysis gas enters the tubular heat exchanger 8 through the first exhaust pipe 204 and the second exhaust pipe 304 respectively. After the condensable biomass oil is condensed by the tubular heat exchanger 8, it is discharged through the vertical oil discharge pipe 801 for discharging the bio-oil and then collected in the oil collecting tank 9 for centralized recovery. The incondensable gas component first enters the carbon dioxide filter 10, and after CO2 is removed, it enters the gas collection tank 11 through the air inlet 1101 of the gas delivery pipe for collection, and then returns to the exhaust assembly 12 arranged on the combustion furnace 1 through the exhaust port 1102 of the gas delivery pipe connected to the gas collection tank 11 for combustion again, thereby providing fuel for subsequent combustion to realize gas recycling.

[0055] Since the drying furnace 4 is farthest from the combustion furnace 1, the heat reaching it is limited, and the temperature is not enough to pyrolyze the biomass therein. Therefore, the drying furnace 4 is mainly used to dry the biomass, and the dried biomass is used in the pyrolysis furnace to ensure sufficient pyrolysis in the pyrolysis furnace. In addition, the water vapor generated by the drying furnace 4 is discharged from the water vapor discharge pipe 404, and the remaining heat is connected to the first heat transfer pipe 5 and the second heat transfer pipe 402 through the fourth skid port 501. The heat enters the heating chamber of the hot water boiler 6. The hot water boiler 6 can boil the water added from the water inlet 602 by utilizing the residual heat of pyrolysis, so as to boil water, and the boiled water is recovered by the hot water collector 7; the first heat transfer pipe 5 is mainly used to remove pyrolysis tail gas, residues and other substances.

[0056] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A skid-mounted biomass efficient combustion and waste heat biochar production system, comprising a combustion furnace (1) for aerobically combusting biomass fed into the combustion furnace (1), characterized in that: Also includes: A pyrolysis furnace, at least one of which is used for pyrolyzing biomass filled in the pyrolysis furnace, wherein the pyrolysis furnace comprises a heat energy delivery pipe which is sealed and passes through the pyrolysis furnace, wherein the heat energy delivery pipe is connected to the combustion furnace (1), and the heat energy delivery pipe is used for delivering heat generated by aerobic combustion of the combustion furnace (1) into the pyrolysis furnace, thereby providing heat for anaerobic or oxygen-poor pyrolysis of biomass in the pyrolysis furnace; The water heater (6) has a heating chamber, and the heating chamber is connected to the heat energy transport pipe through the first heat transport pipe (5); Gas recovery and biomass oil separation unit, including: A tubular heat exchanger (8) is connected to the pyrolysis furnace through an exhaust pipe and is used to condense biomass oil in the high-temperature gas. The heat exchange tubes in the tubular heat exchanger (8) are connected to a plurality of vertical oil discharge pipes (801); A gas delivery pipe, one end of which is connected to the heat exchange pipe and the other end of which is connected to the combustion furnace (1), is used to deliver the pyrolysis gas to the combustion furnace (1) for reuse.

2. The skid-mounted biomass efficient combustion and waste heat biochar production system according to claim 1 is characterized in that: A carbon dioxide filter (10) is connected between the heat exchange tube and the gas delivery tube.

3. The skid-mounted biomass efficient combustion and waste heat biochar production system according to claim 2 is characterized in that: A gas collecting tank (11) is connected between the carbon dioxide filter (10) and the gas delivery pipe, a first valve is provided on the gas delivery pipe and the exhaust pipe, and a filter screen is provided on the inner wall of the pyrolysis furnace.

4. The skid-mounted biomass efficient combustion and waste heat biochar production system according to claim 1 is characterized in that: An ignition device (12) is provided inside the combustion furnace (1), and the ignition device (12) is connected to the output end of the gas delivery pipe.

5. The skid-mounted biomass efficient combustion and waste heat biochar production system according to claim 1 is characterized in that: A drying furnace (4) is also provided between the pyrolysis furnace and the hot water boiler (6), and the drying furnace (4) is used to pre-dry the biomass pyrolyzed in the pyrolysis furnace. The hot water boiler (6) is connected to a water vapor exhaust pipe (404), and a second valve is provided on the water vapor exhaust pipe (404). The drying furnace (4) includes a second heat transfer pipe (403) that is sealed and runs through the drying furnace (4), one end of the second heat transfer pipe (403) is connected to the heat energy transfer pipe, and the other end of the second heat transfer pipe (403) is connected to the first heat transfer pipe (5).

6. The skid-mounted biomass efficient combustion and waste heat biochar production system according to claim 1 is characterized in that: There are two pyrolysis furnaces, and the two pyrolysis furnaces are a first pyrolysis furnace (2) and a second pyrolysis furnace (3); the first pyrolysis furnace (2) includes a first heat energy transport pipe (203) that is sealed and passes through the first pyrolysis furnace (2); the second pyrolysis furnace (3) includes a second heat energy transport pipe (303) that is sealed and passes through the second pyrolysis furnace (3); one end of the first heat energy transport pipe (203) is connected to the combustion furnace (1), the other end of the first heat energy transport pipe (203) is connected to one end of the second heat energy transport pipe (303), and the other end of the second heat energy transport pipe (303) is connected to the first heat transfer pipe (5).

7. The skid-mounted biomass efficient combustion and waste heat biochar production system according to claim 1 is characterized in that: The pyrolysis furnace also includes a hollow cylindrical furnace body, the heat energy transport pipe is arranged in the cylindrical furnace body along the horizontal axis of the cylindrical furnace body, and the biomass is filled in the biomass pyrolysis zone between the cylindrical furnace body and the tube wall of the heat energy transport pipe.

8. The skid-mounted biomass efficient combustion and waste heat biochar production system according to claim 1 is characterized in that: A firewood stove (103) is provided on the top of the pyrolysis furnace, and a baking chamber (104) is also provided on the outer wall of the top of the pyrolysis furnace.

9. The skid-mounted biomass efficient combustion and waste heat biochar production system according to claim 1, characterized in that: A biochar collection box (106) is provided at the bottom of the pyrolysis furnace.

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