CN108949207A - A kind of internal-combustion and-heating type biomass continuously carbonizing system and its production technology - Google Patents

Abstract

A kind of internal-combustion and-heating type biomass continuously carbonizing system, including internal-combustion and-heating type upright furnace and xyloid coal air purifying apparatus, upright furnace includes dryer section from top to bottom, dry distillation charring section, cooling section, the tracery wall two sides of cooling section are arranged radially multiple gas distribution grid below the gas port of tracery wall, the nearly gas port arrangement of gas distribution grid, and multiple gas-distributing channels are formed between gas port, the collection ballute battle array of dryer section passes through xyloid coal air purifying apparatus, gas mixer, the main airway of tracery wall, gas port, gas-distributing channel is communicated with gas distribution grid, production technology are as follows: raw material is first through dryer section, dry distillation charring section obtains dry distillation gas, dry distillation gas passes through collection ballute battle array again, gas cleaning device, which enters after gas mixer is mixed with air by 1.7~2.1: 1, rises to half flameless combustion of progress of dry distillation charring section.The design is applicable not only to the dry distillation charring of small particle material, and improves the calorific value of dry distillation gas and the yield of biomass carbon.

Description

A kind of internal combustion and internal heating biomass continuous carbonization system and its production process

technical field

The invention belongs to the technical field of biomass carbonization, and in particular relates to an internal combustion and internal heating type biomass continuous carbonization system and a production process thereof.

Background technique

Biomass carbonization refers to the use of thermochemical reaction principles to process biomass raw materials (straw: cotton, castor, sunflower and other plant stalks, forestry three biology: forestry waste and wood processing residues and others) through certain process, chemical The process by which a reaction produces products and by-products. During the carbonization process, the excess water and volatiles in the biomass raw materials are removed, and the cellulose, hemicellulose, lignin, etc. are partially decomposed, not only biochar can be obtained, but also combustible gas and condensable liquid can be produced (wood tar and wood vinegar) and other products.

Chinese patent: Authorized announcement number CN205740890, the utility model patent of authorized announcement date on November 30, 2016 discloses a continuous biomass charcoal gas cogeneration device, the top of the furnace body is provided with a feed port, and the bottom is provided with a discharge port And the unloading hopper, the inner cavity of the furnace is provided with a drying chamber and a carbonization chamber in sequence from top to bottom, and a gas inlet connected with the inner cavity of the furnace is arranged on the side wall of the furnace body at the top of the carbonization chamber, and the gas inlet is connected to the combustion chamber through the air intake pipe. The gas outlet of the discharge hopper is connected to the gas outlet, and the gas outlet connected to the inner cavity of the furnace is provided on the side wall of the unloading hopper. Into the combustion chamber, an air extraction device is installed on the air extraction pipe, and a sieve plate is installed at the bottom of the carbonization chamber. The carbonization chamber and the discharge port are separated by a sieve plate, and the sieve plate is driven by a driving device. Although the calorific value of combustible gas obtained by it is as high as 1250kcal/m ³ , the following defects still exist:

1. The device is an external-combustion and internal-heating carbonization furnace with a complex structure, which requires a separate combustion chamber and burner, making it difficult to heat and ignite;

2. This device is only suitable for biomass raw materials with larger particles (particle size greater than 30mm). For biomass raw materials with a particle size of less than 30mm, due to dense accumulation, small gaps, poor air permeability, high-temperature flue gas is difficult to penetrate The material layer makes it difficult to carbonize the middle part of the raw material, which affects the yield and quality of biochar.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned problems existing in the prior art, and provide an internal combustion and internal heat continuous biomass carbonization system and its production process, which are suitable for the carbonization of small particle biomass raw materials.

For realizing above object, technical scheme of the present invention is as follows:

An internal combustion and internal heating type biomass continuous carbonization system, comprising an internal combustion and internal heating type vertical furnace, the interior of the internal combustion and internal heating type vertical furnace includes a feeding section, a drying section, a dry distillation carbonization section, and a cooling section connected in sequence from top to bottom. A flower wall is arranged in the cooling section, and a plurality of air distribution grids located below the air guide holes of the flower wall are arranged radially on both sides of the flower wall. The air distribution grids are arranged near the air guide holes, and a plurality of Divide the airway.

The air distribution grid has a zigzag structure or is formed by a plurality of stainless steel grid bars vertically arranged at equal intervals of 5 to 10 mm, and the distance between adjacent air distribution grids is 100 to 300 mm.

The system also includes a gas purification device, the top of the drying section is provided with a gas collection umbrella array, and the exhaust port of the gas collection umbrella array passes through the bridge pipe, the gas purification device, the return gas pipeline and the gas mixer in sequence. The air intake outer pipe is connected, the air intake inner pipe coaxially arranged inside the air intake outer pipe is connected with the air pipeline, and the exhaust port of the gas mixer passes through the main air channel of the flower wall, the air guide hole and the inlet of the air distribution channel in turn. connected.

The gas purification device includes a water-sealed gas collection box, a Venturi tower, a swirl plate tower, a gas blower, and a cyclone demister. The exhaust end of the sealed gas box communicates with the inlet end of the furnace gas pipeline through the Venturi tower, the swirl plate tower, the gas fan, and the cyclone demister in turn.

The liquid outlets of the water-sealed gas collection box and the Venturi tower are all communicated with the wood vinegar and wood tar clarification and separation heat tank through No. 1 recovery pipeline, and the discharge outlets of the swirl plate tower, gas blower, and cyclone demister The liquid ports are all communicated with the clarification and separation cold tank of wood vinegar and wood tar through the No. 2 recovery pipeline.

The dry distillation and carbonization section is provided with several temperature-measuring thermocouples, and the temperature-measuring thermocouples extend from the furnace wall of the internal-combustion and internal-heating vertical furnace to the vicinity of the junction between the vertical line of the adjacent gas distribution grid and the top surface of the flower wall;

The bottom of the internal-combustion and internal-heating vertical furnace is provided with a wood vinegar liquid that communicates with the bottom of the cooling section to seal out the coke groove.

A production process of an internal combustion and internal heat type biomass continuous carbonization system comprises the following steps in sequence:

Drying: first feed the raw material into the internal combustion internal heating type vertical furnace from the feeding section, and then the raw material enters the drying section to exchange heat with the gas heat carrier to complete the drying, wherein the raw material is at least one of agricultural and forestry waste and domestic garbage RDF kind;

Dry distillation carbonization and cooling: firstly, the dried raw material enters the dry distillation carbonization section under the action of its own gravity and is carbonized by gas heat carrier to obtain dry distillation gas and dry distillation material, and then the dry distillation material passes through the cooling section and is discharged out of the furnace. The gas heat carrier flows to the drying section, and after exchanging heat with the raw materials in the drying section, it enters the gas purification device through the gas collection umbrella array and the bridge tube for purification and cooling treatment. Part of the purified and cooled gas passes through the furnace gas pipeline and is fed into the The outer tube enters the gas mixer, and mixes with the air entering the gas mixer through the inlet inner tube according to the required ratio to form a mixed gas, and then the mixed gas passes through the main air channel, air guide hole, sub-air channel, and air distribution grid in turn. Exchange heat with the carbonized material in the cooling section, then rise to the material layer of the carbonization and carbonization section for semi-flameless combustion, and form a gas heat carrier to carry out carbonization and carbonization of the dry raw material in the carbonization and carbonization section, wherein the volume of the gas and air The ratio is 1.7～2.1:1.

In the drying step, the particle size of the raw material is 3-120mm, the water content thereof is below 25%, and the drying temperature is 150-200°C;

In the dry distillation carbonization and cooling steps, the temperature of the carbonization carbonization is 250-650°C.

The dry distillation carbonization and cooling steps also include the recovery of wood vinegar and wood tar;

The recovery of wood vinegar and wood tar refers to: during the purification and cooling process, the mixture of wood vinegar and wood tar produced in the water-sealed gas collection box and Venturi tower enters the wood vinegar and wood tar through No. 1 recovery pipeline. In the tar clarification and separation hot tank, the mixture of wood vinegar and wood tar produced in the swirl plate tower, gas fan, and cyclone demister enters the wood vinegar and wood tar clarification and separation cold tank through the No. 2 recovery pipeline, and separates Get wood vinegar, wood tar.

The dry distillation carbonization and cooling step also includes the preliminary processing operation of the dry distillation material;

The primary processing of the retort material refers to: the retort material is discharged from the cooling section, enters the wood vinegar liquid to seal out the coke groove, and is used as the primary product of carbon-based fertilizer after being impregnated in the wood vinegar liquid.

Compared with prior art, the beneficial effect of the present invention is:

1. An internal combustion and internal heating type biomass continuous carbonization system of the present invention includes an internal combustion and internal heating type vertical furnace, and the interior of the internal combustion and internal heating type vertical furnace includes a feeding section, a drying section, a dry distillation carbonization section, and a cooling section connected in sequence from top to bottom, There is a flower wall in the cooling section. On both sides of the flower wall, there are a plurality of air distribution grids located below the air guide holes of the flower wall. The design arranges air distribution grids on both sides of the flower wall and forms multiple air distribution channels with the air guide holes, which not only achieves uniform air distribution, but also makes the gas discharged from the air guide holes penetrate the small particle material layer in the horizontal direction. Therefore, the air permeability problem of small particle materials is solved, and the internal combustion and internal heating type vertical furnace is guaranteed to be suitable for dry distillation and carbonization of biomass materials with particle sizes ranging from 3 to 120 mm. Therefore, the present invention is suitable for dry distillation and carbonization of biomass materials with a particle size of 3-120 mm.

2. The top of the drying section in the internal combustion and internal heat type biomass continuous carbonization system of the present invention is provided with a gas-collecting umbrella array, and the exhaust port of the gas-collecting umbrella array passes through the bridge pipe, the gas purification device, the furnace gas pipeline and the gas The air intake outer pipe of the mixer is connected, the air intake inner pipe coaxially arranged inside the air intake outer pipe is connected with the air pipeline, and the exhaust port of the gas mixer passes through the main air channel of the flower wall, the air guide hole and the air distribution channel in turn. The inlet is connected. During the production process, the dry distillation gas generated during the dry distillation and carbonization process will enter the gas purification device through the bridge pipe for purification treatment. Part of the purified dry distillation gas will be used as a heat source for dry distillation and carbonization, and enter the gas mixer through the furnace gas pipeline. After being mixed with air in a specific ratio, it rises to the material layer of the carbonization section for semi-flameless combustion, forming a gas heat carrier to carbonize the dry raw material in the carbonization section. This design utilizes the control of incomplete combustion of gas in the furnace. The oxygen heating method and the method of mixing gas and air before burning not only ensure uniform heating and convenient temperature control, but also make the calorific value of dry distillation gas greater than 1500kcal/m ³ , which is about 40% higher than the calorific value of conventional biomass gasification gas , The yield of the obtained biochar is as high as 30% to 40%, which is much higher than the 15% to 25% of conventional biomass gasification polygeneration, and the carbonization cycle is shortened to 6 to 8 hours. Therefore, the invention not only improves the calorific value of dry distillation gas and the yield of biomass charcoal, but also shortens the carbonization cycle.

Description of drawings

Fig. 1 is a structural block diagram of the present invention.

Fig. 2 is a schematic structural view of an internal-combustion and internal-heating vertical furnace in Example 1 of the present invention.

FIG. 3 is a side view of FIG. 2 .

FIG. 4 is a schematic structural diagram of the gas distribution grid in Example 6. FIG.

In the picture:

Internal combustion and internal heating type vertical furnace 1, feeding section 11, drying section 12, dry distillation and carbonization section 13, cooling section 14, flower wall 15, main air passage 151, sub-air passage 152, air distribution grid 153, air guide hole 154, gas collection umbrella Array 16, gas purification device 2, water-sealed gas collection box 21, Venturi tower 22, swirl plate tower 23, gas fan 24, cyclone demister 25, bridge pipe 3, return gas pipeline 4, gas mixer 5 , air intake outer pipe 51, air intake inner pipe 52, No. 1 recovery pipeline 61, No. 2 recovery pipeline 62, wood vinegar and wood tar clarification and separation hot tank 71, wood vinegar and wood tar clarification and separation cold tank 72, wood Vinegar liquid seals out the coke groove 8, temperature measuring thermocouple 9;

The direction indicated by the solid line is the direction of the airflow, and the direction indicated by the dotted line is the direction of the liquid.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1 to Fig. 4, an internal combustion and internal heating type biomass continuous carbonization system includes an internal combustion and internal heating type vertical furnace 1, and the interior of the internal combustion and internal heating type vertical furnace 1 includes a feed section 11, a drying Section 12, dry distillation and carbonization section 13, cooling section 14, the cooling section 14 is provided with a flower wall 15, and the two sides of the flower wall 15 are radially provided with a plurality of air distribution grids 153 below the air guide holes 154 of the flower wall 15, The air distribution grid 153 is arranged close to the air guide holes 154 , and a plurality of air distribution channels 152 are formed between the air guide holes 154 .

The air distribution grid 153 is a zigzag structure or a plurality of stainless steel grid bars vertically arranged at equal intervals of 5-10 mm, and the distance between adjacent air distribution grids 153 is 100-300 mm.

The system also includes a gas purification device 2, the top of the drying section 12 is provided with a gas collection umbrella array 16, and the exhaust port of the gas collection umbrella array 16 passes through the bridge pipe 3, the gas purification device 2, and the furnace gas pipe in turn. The road 4 communicates with the air intake outer pipe 51 of the gas mixer 5, and the air intake inner pipe 52 coaxially arranged inside the air intake outer pipe 51 communicates with the air pipeline, and the exhaust port of the gas mixer 5 passes through the flower wall 15 in turn. The main air passage 151, the air guide hole 154 communicate with the inlet of the air distribution passage 152.

The gas purification device 2 includes a water-sealed gas collection box 21, a Venturi tower 22, a swirl plate tower 23, a gas blower 24, and a cyclone demister 25. The exhaust ends of 3 are connected, and the exhaust end of the water-sealed gas collection box 21 is connected with the inlet end of the furnace gas pipeline 4 through the Venturi tower 22, the swirl plate tower 23, the gas fan 24, and the cyclone demister 25. .

The drain outlets of the water-sealed gas collection box 21 and the Venturi tower 22 are all communicated with wood vinegar and wood tar clarification and separation heat tank 71 through No. 1 recovery pipeline 61, and the swirl plate tower 23, gas blower 24, The liquid outlets of the cyclone eliminator 25 communicate with the clarification and separation cold tank 72 of wood vinegar and wood tar through No. 2 recovery pipeline 62 .

The dry distillation and carbonization section 13 is provided with several temperature-measuring thermocouples 9, and the temperature-measuring thermocouples 9 extend from the furnace wall of the internal-combustion and internal-heating vertical furnace 1 to the vertical line of the adjacent gas distribution grid 153 and the top of the flower wall 15. Near the intersection of faces;

The bottom of the internal-combustion and internal-heating vertical furnace 1 is provided with a coke groove 8 communicated with the bottom of the cooling section 14 by wood vinegar liquid.

A production process of an internal combustion and internal heat type biomass continuous carbonization system comprises the following steps in sequence:

Drying: first feed the raw materials into the internal combustion and internal heating vertical furnace 1 from the feeding section 11, and then the raw materials enter the drying section 12 to exchange heat with the gas heat carrier to complete the drying. at least one of

Dry distillation carbonization and cooling: firstly, the dried raw material enters the carbonization carbonization section 13 under the action of its own gravity and is carbonized by gas heat carrier to obtain carbonization gas and carbonization material, and then the carbonization material passes through the cooling section 14 and is discharged out of the furnace. The gas flows to the drying section 12 along with the gas heat carrier, and after exchanging heat with the raw material in the drying section 12, it enters the gas purification device 2 through the gas collection umbrella array 16 and the bridge tube 3 in turn for purification and cooling treatment, and part of the purified and cooled gas passes through the furnace The gas pipeline 4 enters the interior of the gas mixer 5 through the outer intake pipe 51, and mixes evenly with the air entering the gas mixer 5 through the inner intake pipe 52 to form a mixed gas according to the required ratio, and then the mixed gas passes through the main air channel in turn 151. Air guide holes 154, gas distribution channels 152, and gas distribution grid 153 exchange heat with the carbonization material in the cooling section 14, and then rise to the carbonization section 13 for semi-flameless combustion to form a gas heat carrier for the carbonization The dry raw material in the carbonization section 13 is carbonized by dry distillation, wherein the volume ratio of the gas to air is 1.7-2.1:1.

In the drying step, the particle size of the raw material is 3-120mm, the water content thereof is below 25%, and the drying temperature is 150-200°C;

In the dry distillation carbonization and cooling steps, the temperature of the carbonization carbonization is 250-650°C.

The dry distillation carbonization and cooling steps also include the recovery of wood vinegar and wood tar;

The recovery of wood vinegar and wood tar refers to: during the purification and cooling process, the mixture of wood vinegar and wood tar produced inside the water-sealed gas collecting box 21 and the Venturi tower 22 enters the wood via No. 1 recovery pipeline 61. Vinegar and wood tar are clarified and separated in the hot tank 71, and the mixture of wood vinegar and wood tar produced inside the swirl plate tower 23, gas blower 24, and cyclone demister 25 enters the wood vinegar and wood tar through No. 2 recovery pipeline 62. Tar is clarified and separated in the cold tank 72, and separated to obtain wood vinegar and wood tar.

The dry distillation carbonization and cooling step also includes the preliminary processing operation of the dry distillation material;

The primary processing of the retort material refers to: the retort material is discharged from the cooling section 14 and enters the wood vinegar liquid to seal out the coke tank 8, and is used as the primary product of carbon-based fertilizer after being impregnated in the wood vinegar liquid therein.

Contents of the present invention are described as follows:

The raw material of the present invention can be straw, rice husk, peanut shell, miscellaneous wood, waste bamboo and other agricultural and forestry waste and/or domestic garbage RDF, and its shape can be granule, briquette or sheet (such as wood chips, bamboo chips, etc. ), which can improve the utilization rate of raw materials and reduce production costs. At the same time, the device of the present invention has a wide range of adaptability to the moisture content of materials, and can realize that raw materials with a moisture content of less than 25% can be directly fed into the furnace.

Part of the dry distillation gas obtained in the present invention is used as an internal heat source, and the remaining gas can be used for ignition combustion or gas power generation. The retort material can be directly used in coal-fired power plants, and can also be processed into machine-made charcoal, activated carbon, or used as the primary product of carbon-based fertilizer after being impregnated in the coke tank 8 sealed with wood vinegar. The wood vinegar after clarification and separation can be used for recycling in the water-sealed gas collecting box 21, the Venturi tower 22, the swirl plate tower 23 and the wood vinegar liquid sealing out the coke tank 8, and can also be used as foliar fertilizer.

Air distribution channel 152: The present invention sets the distance between adjacent air distribution channels 152 at 100-300mm, which ensures a better penetration effect of the mixed gas along the horizontal direction, and can be used according to the distribution of material particle size in practical application. Sure.

Drying step: In this step, the drying temperature is controlled at 150-200°C to ensure that the material can be dehydrated without chemical reaction.

Example 1:

Referring to Figures 1 to 3, an internal combustion and internal heating type biomass continuous carbonization system includes an internal combustion and internal heating type vertical furnace 1 and a gas purification device 2. Material section 11, drying section 12, carbonization and carbonization section 13, and cooling section 14, the top of the drying section 12 is provided with an air-collecting umbrella array 16, and the dry distillation and carbonization section 13 is provided with several temperature-measuring thermocouples 9, the A flower wall 15 is arranged in the cooling section 14, and the gas purification device 2 includes a water-sealed gas collecting box 21, a Venturi tower 22, a swirl plate tower 23, a gas blower 24, and a cyclone demister 25. A plurality of air distribution grids 153 located below the air guide holes 154 of the flower wall 15 are provided in the lateral radial direction. The air distribution grids 153 are in a zigzag structure, and the distance between adjacent air distribution grids 153 is 200 mm, which is close to the air guide holes. 154, and form a plurality of air distribution passages 152 between the air guide hole 154, the exhaust port of the air collection umbrella array 16 passes through the bridge pipe 3, the water-sealed air collection box 21, the Venturi tower 22, the swirl plate The tower 23, the gas fan 24, the cyclone demister 25, the furnace gas pipeline 4 communicate with the air intake outer pipe 51 of the gas mixer 5, and the air intake inner pipe 52 coaxially arranged inside the air intake outer pipe 51 is connected with the air The pipelines are connected, and the exhaust port of the gas mixer 5 communicates with the inlet of the gas distribution channel 152 through the main air channel 151 and the air guide hole 154 of the flower wall 15 successively, and the liquid discharge of the water-sealed gas collecting box 21 and the Venturi tower 22 The outlets are all communicated with wood vinegar and wood tar clarification and separation heat tank 71 through No. 1 recovery pipeline 61, and the liquid outlets of the water-sealed gas collecting box 21 and Venturi tower 22 are all connected with wood vinegar through No. 1 recovery pipeline 61. It communicates with the wood tar clarification and separation heat tank 71, and the liquid outlets of the swirl plate tower 23, the gas blower 24, and the cyclone demister 25 are all connected to wood vinegar and wood tar clarification and separation cold tank 72 through the No. 2 recovery pipeline 62 In the same way, the temperature-measuring thermocouple 9 extends from the furnace wall of the internal-combustion and internal-heating type vertical furnace 1 to the vicinity of the junction between the vertical line of the adjacent gas distribution grid 153 and the top surface of the flower wall 15, and the internal-combustion and internal-heating type vertical furnace 1 The bottom of the bottom is also provided with the wood vinegar liquid that communicates with the bottom of the cooling section 14 to seal out the coke groove 8.

A production process of an internal combustion and internal heat type biomass continuous carbonization system is carried out sequentially according to the following steps:

Drying: first feed the raw material into the internal combustion and internal heating vertical furnace 1 from the feeding section 11, and then the raw material enters the drying section 12 to exchange heat with the gas heat carrier to complete the drying. The raw material is straw particles with a particle size of 6 ~50mm, the water content is 9%, and the drying temperature is 200°C;

Dry distillation carbonization and cooling: firstly, the dried raw material enters the dry distillation carbonization section 13 under the action of its own gravity and is carbonized by gas heat carrier to obtain dry distillation gas and dry distillation material, and then the dry distillation material is discharged from the cooling section 14 and enters the wood vinegar liquid seal The coke discharge tank 8 is used as the initial product of charcoal-based fertilizer after being impregnated with the wood vinegar liquid therein. At the same time, the dry distillation gas flows to the drying section 12 along with the gas heat carrier, and after exchanging heat with the raw material of the drying section 12, it passes through the gas-collecting umbrella array 16, The bridge pipe 3 enters the water-sealed gas collection box 21, the Venturi tower 22, the swirl plate tower 23, the gas blower 24, and the cyclone demister 25 for purification and cooling treatment, and part of the purified and cooled gas passes through the furnace gas pipeline 4 Afterwards, it enters the gas mixer 5 through the intake outer tube 51, and mixes evenly with the air that enters the gas mixer 5 through the intake inner tube 52 to form a mixed gas, and then the mixed gas passes through the main air channel 151 and the air guide hole in turn. 154. After the gas distribution channel 152 and the gas distribution grid 153, it exchanges heat with the dry distillation material in the cooling section 14, and then rises to the carbonization and carbonization section 13 for semi-flameless combustion to form a gas heat carrier for the carbonization and carbonization section 13. The dry raw material is carbonized by dry distillation, and the mixture of wood vinegar and wood tar produced in the water-sealed gas collection box 21 and the Venturi tower 22 enters the wood vinegar and wood tar clarification and separation heat tank 71 through the No. 1 recovery pipeline 61, and the swirl plate The mixture of wood vinegar and wood tar produced inside tower 23, gas blower 24, and cyclone demister 25 enters wood vinegar and wood tar clarification and separation cold tank 72 through No. 2 recovery pipeline 62, and separates wood vinegar and wood tar. Wherein, the carbonization temperature is 550° C., and the volume ratio of gas to air is 1.8:1.

Example 2:

The difference with Example 1 is:

The raw material is straw briquettes with a particle size of 32mm, a water content of 17%, and a drying temperature of 190°C.

Example 3:

The difference with Example 1 is:

The raw material is peanut shells, the particle size is 8-30mm, the water content is 22%, and the drying temperature is 188°C;

Example 4:

The difference with Example 1 is:

The raw material is bamboo chips, the particle size is 20-100mm, the moisture content is 25%, and the drying temperature is 180°C.

Example 5:

The difference with Example 1 is:

The raw material is domestic garbage RDF with a particle size of 6-50mm, a water content of 12%, and a drying temperature of 195°C.

Embodiment 6:

Referring to Fig. 4, the difference with Embodiment 1 is:

The air distribution grid 153 is formed by a plurality of stainless steel grid bars vertically arranged at equal intervals of 5mm.

Embodiment 7:

Referring to Fig. 4, the difference with embodiment 6 is:

The carbonization temperature of the dry distillation is 500° C., and the volume ratio of the wood gas to air is 2.0:1.

Claims (10)

1. A continuous carbonization system of internal combustion and internal heat type biomass, characterized in that: The system comprises an internal-combustion and internal-heating type vertical furnace (1), and the inside of the internal-combustion and internal-heating type vertical furnace (1) includes a feeding section (11), a drying section (12), a dry distillation and carbonization section ( 13), the cooling section (14), the cooling section (14) is provided with a flower wall (15), and the two sides of the flower wall (15) are radially provided with a plurality of air guide holes (154) located in the flower wall (15) The lower air distribution grid (153), the air distribution grid (153) is arranged close to the air guide hole (154), and forms a plurality of air distribution channels (152) between the air guide hole (154). 2. A continuous internal combustion and internal heating biomass carbonization system according to claim 1, characterized in that: the gas distribution grid (153) is a zigzag structure or consists of a plurality of stainless steel grid bars at equal intervals of 5 to 10 mm They are vertically arranged, and the distance between adjacent air distribution grids (153) is 100-300mm. 3. A kind of internal combustion and internal heat type biomass continuous carbonization system according to claim 1 or 2, characterized in that: the system also includes a gas purification device (2), and the top of the drying section (12) is provided with a collector The gas umbrella array (16), the exhaust port of the gas-collecting umbrella array (16) passes through the bridge pipe (3), the gas purification device (2), the furnace gas pipeline (4) and the gas mixer (5) successively The air intake outer pipe (51) communicates, and the air intake inner pipe (52) coaxially arranged inside the air intake outer pipe (51) communicates with the air pipeline, and the exhaust port of the gas mixer (5) passes through the flower wall ( 15) The main air passage (151), air guide hole (154), sub-air passage (152) communicate with the air distribution grid (153). 4. A kind of internal combustion and internal heat type biomass continuous carbonization system according to claim 3, characterized in that: said gas purification device (2) comprises a water-sealed gas collection box (21), a Venturi tower (22), a rotary Flow plate tower (23), gas blower (24), cyclone demister (25), the inlet end of described water-sealed gas collecting box (21) communicates with the exhaust end of bridge pipe (3), and water-sealed collection The exhaust end of the gas box (21) passes through the Venturi tower (22), the swirl plate tower (23), the gas fan (24), the cyclone demister (25) and the inlet of the furnace gas pipeline (4) in sequence. end-to-end. 5. A kind of internal combustion internal heat type biomass continuous carbonization system according to claim 4, it is characterized in that: the liquid outlet of described water-sealed gas collection box (21), Venturi tower (22) is all recovered through No. 1 Pipeline (61) communicates with wood vinegar and wood tar clarification and separation heat tank (71), and the liquid outlets of described swirl plate tower (23), gas blower (24), cyclone demister (25) all pass through two No. recovery pipeline (62) communicates with wood vinegar and wood tar clarification and separation cold tank (72). 6. A kind of internal combustion and internal heat type biomass continuous carbonization system according to claim 1 or 2, characterized in that: The dry distillation and carbonization section (13) is provided with several temperature-measuring thermocouples (9), and the temperature-measuring thermocouples 9) extend from the furnace wall of the internal-combustion and internal-heating vertical furnace (1) to the adjacent gas distribution grid (153) Near the junction of the vertical line of the wall and the top surface of the flower wall (15); The bottom of the internal-combustion and internal-heating vertical furnace (1) is provided with a wood vinegar liquid sealing coke groove (8) communicated with the bottom of the cooling section (14). 7. A production process of the internal combustion internal heating type biomass continuous carbonization system according to claim 1, characterized in that: The system also includes a gas purification device (2), the top of the drying section (12) is provided with a gas collection umbrella array (16), and the exhaust port of the gas collection umbrella array (16) passes through the bridge pipe (3 ), the gas purification device (2), the furnace gas pipeline (4) communicate with the air inlet outer pipe (51) of the gas mixer (5), and the air inlet inner pipe (51) coaxially arranged inside the air inlet outer pipe (51) The pipe (52) communicates with the air pipeline, and the exhaust port of the gas mixer (5) communicates with the inlet of the air distribution channel (152) through the main air channel (151) and the air guide hole (154) of the flower wall (15) successively; Described production technique comprises the following steps in turn: Drying: first feed the raw material into the internal combustion and internal heating vertical furnace (1) from the feeding section (11), then the raw material enters the drying section (12) to exchange heat with the gas heat carrier to complete drying, wherein the raw material is agricultural and forestry waste At least one of RDF of objects and domestic waste; Dry distillation carbonization and cooling: first, the dried raw material enters the dry distillation carbonization section (13) under the action of its own gravity and is carbonized by gas heat carrier to obtain dry distillation gas and dry distillation material, and then the dry distillation material passes through the cooling section (14) and is discharged from the furnace In addition, at the same time, the dry distillation gas flows to the drying section (12) along with the gas heat carrier, and after exchanging heat with the raw material in the drying section (12), it enters the gas purification device (2) through the gas collection umbrella array (16) and the bridge tube (3) successively. The purified and cooled part of the gas passes through the furnace gas pipeline (4) and then enters the gas mixer (5) through the air inlet outer pipe (51), and is mixed with the gas entering through the air inlet inner pipe (52). The air in the device (5) is mixed evenly according to the required ratio to form a mixed gas, and then the mixed gas passes through the main air channel (151), the air guide hole (154), the branch air channel (152), the air distribution grid (153) and the cooling The dry distillation material in the section (14) is heat-exchanged, and then rises to the material layer of the dry distillation carbonization section (13) for semi-flameless combustion, forming a gas heat carrier to carry out dry distillation carbonization of the dry raw material in the dry distillation carbonization section (13), wherein, The volume ratio of the gas to the air is 1.7-2.1:1. 8. The production process of a kind of internal combustion and internal heating type biomass continuous carbonization system according to claim 7, characterized in that: In the drying step, the particle size of the raw material is 3-120mm, the water content thereof is below 25%, and the drying temperature is 150-200°C; In the dry distillation carbonization and cooling steps, the temperature of the carbonization carbonization is 250-650°C. 9. The production process of a kind of internal combustion and internal heating type biomass continuous carbonization system according to claim 7, characterized in that: Described gas purifying device (2) comprises water-sealed gas collecting box (21), Venturi tower (22), swirl plate tower (23), gas fan (24), cyclone demister (25), described water The inlet end of the sealed gas collection box (21) communicates with the exhaust end of the bridge pipe (3), and the exhaust end of the water-sealed gas collection box (21) passes through the Venturi tower (22), the swirl plate tower (23) ), gas blower (24), cyclone demister (25) communicate with the inlet end of the furnace gas pipeline (4); The drain outlets of the water-sealed gas collection box (21) and the Venturi tower (22) are all communicated with wood vinegar and wood tar clarification and separation heat tank (71) through No. 1 recovery pipeline (61), and the cyclone The drain outlets of plate tower (23), gas fan (24), and cyclone demister (25) are all communicated with wood vinegar and wood tar clarification and separation cold tank (72) through No. 2 recovery pipeline (62); The dry distillation carbonization and cooling steps also include the recovery of wood vinegar and wood tar; The recovery of wood vinegar and wood tar refers to: during the purification and cooling process, the mixture of wood vinegar and wood tar produced inside the water-sealed gas collection box (21) and Venturi tower (22) passes through the No. 1 recovery pipe Road (61) enters wood vinegar and wood tar clarification and separation heat tank (71), and the wood vinegar and wood tar produced inside described swirl plate tower (23), gas blower (24), cyclone demister (25) The mixture enters wood vinegar and wood tar clarification and separation cold tank (72) through No. two recovery pipelines (62), and separates to obtain wood vinegar and wood tar. 10. The production process of a kind of internal combustion and internal heating type biomass continuous carbonization system according to claim 7, characterized in that: The bottom of the internal-combustion and internal-heating vertical furnace (1) is provided with a wood vinegar liquid that communicates with the bottom of the cooling section (14) to seal out the coke groove (8); The dry distillation carbonization and cooling step also includes the preliminary processing operation of the dry distillation material; The primary processing of the retort material refers to: the retort material is discharged from the bottom of the cooling section (14), enters the wood vinegar liquid to seal the coke tank (8), and is used as the primary product of carbon-based fertilizer after being impregnated in the wood vinegar liquid.