A combined carbonization furnace, a combined carbonization system and a carbonization process

Abstract

The present invention discloses a combined carbonization furnace, a combined carbonization system and a carbonization process. The combined carbonization furnace comprises two or more carbonization units that can be stacked vertically. Each carbonization unit includes a refractory shell and a refractory bottom plate. The refractory shell and the refractory bottom plate enclose a carbonization cavity with an open top. The carbonization cavity includes a carbonization section and a combustion section. The combustion section is located above the carbonization section and is provided with a first air suction pipe. The refractory shell of the upper carbonization unit is placed on the refractory shell of the lower carbonization unit in a sealed and removable manner. The carbonization section is provided with a carbonization flue, and perforations are formed in the refractory bottom plate. The carbonization units of the above-mentioned combined carbonization furnace can be moved or relocated, and can also be assembled or disassembled with each other. Therefore, the carbonization process and products can be changed and adjusted, so that it has multiple uses or functions and has high flexibility; when the carbon materials in a certain carbonization unit are carbonized to maturity, the carbonization unit can be immediately removed, thereby reducing energy consumption and usage costs.

Description

Technical Field

[0001] The present invention belongs to the carbonization technology in the production of industrial carbon materials, and particularly relates to a combined carbonization furnace, a combined carbonization system and a carbonization process. Background Art

[0002] A carbonization furnace is a main equipment involved in the carbon material processing process. For example, the carbonization furnace in the production of activated carbon, the coke oven in the production of coal coking, and the furnace for mixing and calcining various materials by using the combustion heat of carbon, etc. Industrially, the so-called carbonization process refers to a process of hermetically heating or baking some specific carbonaceous materials in an airtight state, also known as the dry distillation process or pyrolysis process of carbon. Of course, depending on different carbon material products and different occasions, there will be different requirements for the heating method, heating rate, heating temperature, etc. of the raw materials, and even different requirements for the control of the entire dry distillation process and the treatment of the produced gas, liquid, and solid substances.

[0003] At present, the carbonization furnaces or carbonization furnace processes in industry are generally developed and designed specifically for a certain product, that is, the carbonization furnace is usually designed as a fixed-type and fixed-form furnace. The furnace body type and the process process setting are fixed and unchangeable, and even the change in the product output per furnace is very small. Therefore, the existing carbonization furnaces have the disadvantages of single use or function, poor flexibility, and high use cost. Summary of the Invention

[0004] The purpose of the present invention is to provide a combined carbonization furnace, a combined carbonization system and a carbonization process to solve the problems of single use or function, poor flexibility, and high use cost existing in the existing carbonization furnaces.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A combined carbonization furnace includes two or more carbonization units that can be stacked vertically. The carbonization unit at the bottommost layer is removably and hermetically arranged on the collecting flue. A sealing top cover is removably arranged on the top opening of the carbonization unit at the uppermost layer. Each carbonization unit includes a refractory shell and a refractory bottom plate. The refractory shell and the refractory bottom plate enclose a carbonization cavity with a top opening. The carbonization cavity includes a carbonization section for placing carbon materials and a combustion section for burning flue gas. The combustion section is located above the carbonization section, and a first air suction pipe leading from outside the refractory shell to the combustion section is provided on the refractory shell. The refractory shell of the upper carbonization unit is hermetically and removably placed on the refractory shell of the lower carbonization unit. A carbonization flue for the downward passage of flue gas is provided at the carbonization section, and a perforation for the flue gas to pass through to the lower carbonization unit or the collecting flue is opened on the refractory bottom plate.

[0007] Furthermore, a number of heat transfer flue plates are vertically and spaced apart in the carbonization section of the carbonization cavity, dividing the carbonization section into a number of carbonization chambers. Carbonization flues are provided on the heat transfer flue plates. The bottom of the heat transfer flue plates is in contact with the upper surface of the refractory bottom plate, and the carbonization flues are arranged corresponding to the perforations.

[0008] Furthermore, the refractory bottom plate is a removable plate, which is detachably assembled to the bottom of the refractory shell through a number of connecting pins, facilitating the discharging of materials in the carbonization cavity.

[0009] A combined carbonization system includes a collecting flue. A number of flue connection ports are spaced apart on the collecting flue. The above-mentioned combined carbonization furnaces are provided on the flue connection ports, and an air extraction device for extracting the flue gas in the collecting flue is connected to the smoke exhaust end of the collecting flue.

[0010] Furthermore, the combined carbonization system further includes an automatic handling system. The automatic handling system includes a carbonization furnace handling trolley and a hoisting trolley. The hoisting trolley is arranged above the combined carbonization furnace, and the carbonization furnace handling trolley is arranged on one side of the combined carbonization furnace. A number of hooks are provided on the refractory shell and the sealing top cover respectively, facilitating the loading and unloading of the refractory shell or the sealing top cover by hoisting.

[0011] Furthermore, a flue gas waste heat boiler is also provided on the collecting flue to recover and reuse the waste heat of the high-temperature flue gas in the collecting flue.

[0012] Furthermore, the exhaust end of the air extraction device is connected to a cyclone dust collector through a pipeline, and the cyclone dust collector is connected to a chimney through a pipeline.

[0013] Furthermore, a number of flue connection bases are spaced apart on the collecting flue. The inner cavity of the flue connection base includes a rectangular section and an inverted conical section located below the rectangular section. The refractory shell of the carbonization unit at the bottommost layer is placed on the flue connection base through a sealing gasket, and the contraction cone opening of the inverted conical section is docked with the flue connection port of the collecting flue.

[0014] Preferably, a second air suction pipe with an adjustable opening leading to the rectangular section of its inner cavity is provided on the flue connection base.

[0015] A carbonization process includes the following steps:

[0016] Load the formulated and shaped carbonization raw materials into the first carbonization unit. Then, lift the first carbonization unit through the automatic handling system and place it on a flue connection port of the collecting flue. Then, hoist the sealing top cover to the top of the first carbonization unit.

[0017] The gas generated by the carbonized raw materials in the first carbonization unit is ignited by preheating or using an external heat source, so that the temperature in the carbonization unit reaches the process set temperature, the first air intake pipe is opened, and the gas overflowing from the carbonization chamber is mixed with the inhaled air to cause combustion or partial combustion, and the flue gas generated by the combustion reaction goes downward, passes through the carbonization flue, and transfers the heat carried by the material in the carbonization chamber to heat and dry distill it, and then the flue gas is sent to the collecting flue through the perforation and the flue connection port, and the first carbonization unit enters the normal working state;

[0018] The second carbonization unit loaded with carbonization raw materials is lifted by the automatic handling system and placed on another flue connection port of the collecting flue, and then the first carbonization unit and the sealing top cover that have entered the normal working state are placed on the second carbonization unit by the automatic handling system. The refractory shells of the two are sealed by a sealing gasket. Since the carbonization flues of the first carbonization unit and the second carbonization unit are connected, the flue gas from the first carbonization unit enters the carbonization flue of the second carbonization unit, and at the same time, the materials in the carbonization chamber of the second carbonization unit are heated and the overflowing gas is ignited until the second carbonization unit also enters the normal working state;

[0019] Continue to place the carbonization unit and the sealed top cover that have entered the normal working state on the next carbonization unit to be heated, and repeat this operation so that all the carbonization units of all the combined carbonization furnaces on the flue are in the normal working state.

[0020] The beneficial effect of the present invention is that, compared with the prior art, the combined carbonization system is composed of one or more combined carbonization furnaces, each combined carbonization furnace includes more than two carbonization units stacked vertically, the carbonization units can be moved or moved, and can also be assembled and disassembled with each other, so the carbonization process can be changed and adjusted, and the product can also be changed, so that it has multiple uses or functions and has high flexibility; when the carbon material in a carbonization unit is carbonized and mature, the carbonization unit can be immediately removed, thereby avoiding wasting process time and energy, greatly improving the carbonization efficiency, and reducing energy consumption and use costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a combined carbonization system provided by an embodiment of the present invention;

[0022] Figure 2 It is a structural schematic diagram of a combined carbonization furnace provided in one embodiment of the present invention. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0024] For ease of understanding the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, these embodiments are provided so that the disclosure of the present invention can be understood more thoroughly and comprehensively. It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] Please refer to Figure 1 and Figure 2 As shown, in this embodiment, a combined carbonization system mainly includes a collecting flue 1, a combined carbonization furnace 2, a carbonization furnace handling trolley 3, a hoisting crane 4, a flue gas waste heat boiler 5, a flue gas induced draft fan 6, a cyclone dust collector 7 and an exhaust chimney 8. The collecting flue 1 is an underground horizontal flue, which is built with refractory materials. A number of flue connection ports are arranged at intervals on the collecting flue 1, and a flue connection base 9 for connecting with the combined carbonization furnace 2 is built on the flue connection ports. According to different process requirements, the combined carbonization furnace 2 can be selectively arranged on one or some of the flue connection bases 9. The hoisting crane 4 is arranged above the combined carbonization furnace 2, and the carbonization furnace handling trolley 3 is arranged on one side of the combined carbonization furnace 2. The smoke exhaust end of the collecting flue 1 is connected with a flue gas induced draft fan 6. The flue gas waste heat boiler 5 is arranged on the collecting flue 1. The exhaust end of the flue gas induced draft fan 6 is connected with a cyclone dust collector 7 through a pipeline, and the cyclone dust collector 7 is connected with the exhaust chimney 8 through a pipeline.

[0026] The combined carbonization furnace 2 is composed of a number of carbonization units 20. In this embodiment, every two carbonization units 20 are vertically stacked to form a combined carbonization furnace 2. Each combined carbonization furnace 2 is respectively located on the collecting flue 1, and a sealed top cover 10 is arranged at the top of the uppermost carbonization unit 20. Connecting and sealing gaskets 11 are provided between the vertically stacked carbonization units 20, between the carbonization unit 20 and the sealed top cover 10 and the flue connection base 9. The process operation between each combined carbonization furnace 2 is in parallel operation, while the process operation between the carbonization units 20 of the combined carbonization furnace 2 is in series operation. The replacement and handling of the carbonization units 20 during the operation process are completed by the carbonization furnace handling trolley 3 and the hoisting trolley 4. Hooks 12 for hoisting are provided on each carbonization unit 20 and the sealed top cover 10.

[0027] The operation of the combined carbonization furnace 2 and the subsequent carbonization process system is carried out under a slightly negative pressure or slightly vacuum state, and the operating power within the system is provided by the flue gas induced draft fan 6.

[0028] The carbonization unit 20 includes a rectangular steel structure housing 200, a refractory lining 201, a refractory bottom plate 202, connecting pins 203, refractory heat transfer flue plates 204, a first air suction pipe 205 with adjustable opening and a fire-viewing and sampling pipe 206. The steel structure housing 200 serves as the framework of the carbonization unit 20 for load-bearing, and the refractory lining 201 is used for heat insulation. The steel structure housing 200 and the refractory lining 201 together form an integral rigid body. Inside this rectangular integral rigid body, the refractory heat transfer flue plates 204 adopt an inlaid structure, that is, multiple refractory heat transfer flue plates 204 are vertically inserted into the rectangular steel structure housing 200 to divide it into several carbonization chambers 207. The refractory heat transfer flue plate 204 is a plate with a certain thickness and has several vertical carbonization flues 208 drilled on it. It is both the partition plate of the carbonization chamber 207 and the flue plate for conducting partition heat transfer into the carbonization chamber 207. Of course, the refractory heat transfer flue plate 204 can also be cast into an integral part together with the refractory lining 201, which mainly depends on the convenience of production operation and raw material processing. The refractory bottom plate 202 of the carbonization unit 20 is a movable bottom, which is fixed by inserting and extracting the connecting pins 203 arranged horizontally around the steel structure housing 200. The movable bottom structure facilitates the discharging of materials in the carbonization chamber. The upper surface of the refractory bottom plate 202 contacts the bottom of the vertical refractory heat transfer flue plate 204, and several through holes 209 corresponding to and communicating with the carbonization flues 208 are provided on the refractory bottom plate 202 to facilitate the passage of flue gas. At the same time, the through holes 209 also have the function of connecting the airflows of the upper and lower two carbonization units 20 into one body. A suitable space with a small height is left near the top inside the steel structure housing 200, and this space can be called the combustion chamber 210 of the carbonization unit 20. On the two side wall plates of the combustion chamber 210, a first air suction pipe 205 with adjustable opening is horizontally arranged, and the amount of air inhaled into the combustion chamber 210 can be controlled by the opening of the first air suction pipe 205. Inside this combustion chamber 210, the inhaled air is mixed with the gas overflowing from the carbonization chamber 207 to undergo combustion or partial combustion. The flue gas generated by the combustion reaction descends and passes through the carbonization flues 208 of the refractory heat transfer flue plate 204, transferring the carried heat to the materials in the carbonization chamber 207. A fire-viewing and sampling pipe 206 is arranged at the center near the top of the carbonization chamber 207 to monitor the carbonization process.

[0029] The sealed top cover 10 is composed of a rectangular steel shell and a refractory lining and forms an integral body. Hooks 12 for lifting are provided beside the four corners of it. A local top cover pressure gauge 13 and a top cover thermometer 14 are arranged on the top of the sealed top cover 10 to observe the working pressure and temperature inside the carbonization furnace box.

[0030] The inner cavity of the flue connection base 9 includes a rectangular section and an inverted conical section located below the rectangular section. The upper end of the flue connection base 9 is docked with the steel structure shell 200 of the carbonization unit 20 at the bottommost layer, and a sealing gasket 11 is provided at the docking position. The contraction cone opening of the inverted conical section in the inner cavity of the flue connection base 9 is docked with the flue connection port of the collecting flue. A second air suction pipe 15 with an adjustable opening leading to the rectangular section of its inner cavity is provided on the flue connection base 9. The inverted conical section in the inner cavity of the flue connection base 9 and the flue connection port of the collecting flue are both a flue gas collection chamber and a combustion chamber of a combined carbonization furnace 2, so that the combustible components in the flue gas distilled from the combined carbonization furnace 2 can be completely burned as much as possible before entering the collecting flue 1. A flue gas waste heat boiler 5 is provided on the collecting flue 1, which recovers the heat energy of the flue gas on the one hand and reduces the temperature of the flue gas discharged to the atmosphere on the other hand. The flue gas waste heat boiler 5 can be designed as a saturated steam boiler, a superheated steam boiler, or even a hot water boiler according to the on-site heat source demand, and is self-contained, including a feed water system, a blowdown system, a heat source output system, etc. A flue gas induced draft fan 6 is provided at the outlet end of the collecting flue 1 to provide power for the operation of the carbonization furnace system. The outlet of the flue gas induced draft fan 6 is connected to a cyclone dust collector 7 through a first pipe 16, and the gas outlet of the cyclone dust collector 7 is connected to a chimney 8 through a second pipe 17. Both the first pipe 16 and the second pipe 17 are made of steel pipes, and a flue gas composition sampling port 18 and a flue gas thermometer port 19 are provided on the second pipe 17.

[0031] The specific technological steps of the above combined carbonization system are as follows:

[0032] In the raw material yard, the formed carbonization raw materials are loaded into a certain carbonization unit 20 of the combined carbonization furnace 2 (such as Figure 1a, b, c, d) marked in the figure, and transported to the carbonization section by the carbonization furnace transport trolley 3 via the track; the carbonization unit 20 is lifted by the lifting trolley 4 and transported to a flue connecting base 9 of the collecting flue 1 (there are several combined carbonization furnaces 2, and there are several flue connecting bases 9 on the collecting flue 1, and the two match), and then a sealing top cover 10 is covered (the number of sealing top covers 10 matches the number of combined carbonization furnaces 2). During the first production, it is necessary to preheat the carbonization unit 20 and the raw materials, or use an external heat source to ignite the carbonization furnace so that the temperature in the furnace reaches 600°C to 650°C, and then open the first air intake pipe 205, and the gas overflowing from the carbonization chamber 207 mixes with the inhaled air to cause combustion or partial combustion. The flue gas generated by the combustion reaction goes downward and passes through the carbonization flue 208 of the refractory heat transfer flue plate 204, and transfers the heat it carries to the material in the carbonization chamber 207, which is heated and distilled. The flue gas passes through the carbonization flue 208 of the refractory heat transfer flue plate 204 and the refractory bottom plate 202 and enters the flue connecting base 9. In the flue connecting base 9, the flue gas continues to mix and burn with the air entering the flue connecting base 9 from the second air intake pipe 15. Finally, the flue gas is sent to the collecting flue 1. At this point, the first carbonization unit 20 basically enters a normal working state.

[0033] Repeat the process of transporting the second carbonization unit 20 loaded with materials from the raw material yard to the carbonization section via the track using the carbonization furnace transport trolley 3, and then the second carbonization unit 20 is lifted by the hoisting trolley 4 and transported to another flue connection base 9 of the flue 1, and then the first carbonization unit 20 and the sealing top cover 10 that have entered normal working state are lifted by the hoisting trolley 4 and placed on the second carbonization unit 20 (a connecting sealing gasket 11 is placed between the steel structure shells 200 of the two carbonization units 20). Since the carbonization flue 208 of the refractory heat transfer flue plate 204 between the two carbonization units 20 is through, that is, the carbonization flue 208 is connected from top to bottom, the flue gas from the first carbonization unit 20 enters the flue of the second carbonization unit 20, and the flue gas passing through the flue of the second carbonization unit 20 heats the materials in the carbonization chamber of the second carbonization unit 20 and ignites the overflowing gas until the second carbonization unit 20 also enters normal working state.

[0034] The heat discharged from the last carbonization unit 20 (or the carbonization unit 20 that is working normally in front) is used to heat the material of the next carbonization unit 20. This operation of repeatedly moving the box body allows all the carbonization units 20 of the combined carbonization furnace 2 to enter a normal working state (also called a hot working state of the carbonization furnace). Of course, when the material in a carbonization unit 20 that is in a normal working state reaches the carbonization final temperature or the set carbonization time, it can be moved to the carbonization furnace transport trolley 3 at any time by the crane trolley 4 and sent to the next process or the carbonization product cooling area.

[0035] The carbonization unit 20 in the hot operating state has a very high temperature. The discharging and loading operations generally take only dozens of seconds to a few minutes. Since the carbonization unit 20 just after discharging contains a high amount of residual heat, the materials newly loaded into the carbonization unit 20 just after discharging can directly enter the normal working state without going through the preheating operation again. As described above, this carbonization process belongs to a cyclic operation process.

[0036] The flue gas generated during the working process (material dry distillation process) of the combined carbonization furnace 2 is sucked into the collecting flue 1 by the flue gas induced draft fan 6. During the carbonization process of the carbonization furnace, generally, every ton of raw carbon or carbon material will generate hundreds of cubic meters of flue gas. The temperature of the flue gas is 800°C - 1800°C, carrying a huge amount of heat. It is natural to recycle this part of the heat. This invention or this carbonization furnace process realizes the recovery of this part of the heat by means of the flue gas waste heat boiler 5 installed on the collecting flue 1. As described above, this flue gas waste heat boiler 5 belongs to an independent system, and the boiler can be set according to the actual heat source requirements on site. This boiler can be designed as a boiler for producing saturated steam, superheated steam, or hot water products, or it can be designed as a boiler that can provide all three, so that the products can be used to drive steam turbines for power generation, can be used as industrial heat sources, or can also be used for civil heating.

[0037] The temperature of the flue gas discharged from the flue gas waste heat boiler 5 is already very low (generally 140°C - 180°C). Subsequently, the flue gas enters the flue gas induced draft fan 6. The type of the induced draft fan can be a centrifugal fan or a Roots blower, etc. The flue gas sent out from the flue gas induced draft fan 6 enters the cyclone dust collector 7 through the first pipeline 16. After being dust-removed and purified by the cyclone dust collector 7, it enters the exhaust chimney 8 through the second pipeline 17 and is discharged from the exhaust chimney 8. A flue gas composition sampling port 18 and a flue gas thermometer port 19 are provided on the second pipeline 17, and the exhaust temperature and exhaust composition (SO 2 , NO X etc.) of the flue gas can be monitored and analyzed. Of course, the exhaust composition SO 2 , NO X of the flue gas must meet the national and local environmental protection standards. If the standard requirements cannot be met, desulfurization and denitrification treatment facilities can be added between the cyclone dust collector 7 and the exhaust chimney 8 from the process.

[0038] It should be noted that this combined carbonization system is not only applicable to the carbonization process of industrial carbon materials, but can also be applied to processes such as coking and calcination according to the needs for adaptive adjustment.

[0039] The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, various changes and modifications can be made to the present invention, and these changes and modifications all fall within the scope claimed by the present invention. The scope claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined carbonization furnace, characterized in that, it includes two or more carbonization units that can be stacked vertically. The carbonization unit at the bottommost layer is removably and hermetically arranged on the collecting flue. A sealing top cover is removably arranged on the top opening of the carbonization unit at the uppermost layer. Each carbonization unit includes a refractory shell and a refractory bottom plate. The refractory shell and the refractory bottom plate enclose a carbonization cavity with a top opening. The carbonization cavity includes a carbonization section for placing carbon materials and a combustion section for burning flue gas. The combustion section is located above the carbonization section, and a first air suction pipe leading from outside the refractory shell to the combustion section is provided on the refractory shell. The refractory shell of the carbonization unit at the upper layer is hermetically and removably placed on the refractory shell of the lower layer carbonization unit. A carbonization flue for the downward passage of flue gas is provided at the carbonization section, and perforations for the flue gas to pass through to the lower carbonization unit or into the collecting flue are provided on the refractory bottom plate.

2. The combined carbonization furnace according to claim 1, characterized in that, a number of heat transfer flue plates that are vertically and spaced apart are arranged in the carbonization section of the carbonization cavity to divide the carbonization section into several carbonization chambers. The carbonization flue is provided on the heat transfer flue plates. The bottom of the heat transfer flue plates is in contact with the upper surface of the refractory bottom plate. The carbonization flue is arranged corresponding to the perforations.

3. The combined carbonization furnace according to claim 1, characterized in that, the refractory bottom plate is a movable plate, and it is removably assembled to the bottom of the refractory shell through a number of connecting pins.

4. A combined carbonization system, characterized in that, it includes a collecting flue. A number of flue connection ports are spaced apart on the collecting flue. The combined carbonization furnace according to any one of claims 1 - 3 is provided on each flue connection port, and an air extraction device for extracting the flue gas in the collecting flue is connected to the smoke exhaust end of the collecting flue.

5. The combined carbonization system according to claim 4, characterized in that, it further includes an automatic handling system. The automatic handling system includes a carbonization furnace handling trolley and a hoisting trolley. The hoisting trolley is arranged above the combined carbonization furnace. The carbonization furnace handling trolley is arranged on one side of the combined carbonization furnace. A number of hooks are provided corresponding to the refractory shell and the sealing top cover.

6. The combined carbonization system according to claim 4, characterized in that, a flue gas waste heat boiler is further provided on the collecting flue.

7. The combined carbonization system according to claim 4, characterized in that, the exhaust end of the air extraction device is connected to a cyclone dust collector through a pipeline, and the cyclone dust collector is connected to a chimney through a pipeline.

8. The combined carbonization system according to claim 4, characterized in that, a number of flue connection bases are spaced apart on the collecting flue. The inner cavity of the flue connection base includes a rectangular section and an inverted conical section located below the rectangular section. The refractory shell of the carbonization unit at the bottommost layer is placed on the flue connection base through a sealing gasket. The contraction cone opening of the inverted conical section is docked with the flue connection port of the collecting flue.

9. The combined carbonization system according to claim 8, It is characterized in that The flue connection base is provided with a second air intake pipe of a rectangular section leading to its inner cavity.

10. A carbonization process, It is characterized in that It includes the following steps: The prepared carbonized raw materials are loaded into the first carbonization unit, and then the first carbonization unit is lifted by an automatic handling system and placed on a flue connection port of the flue, and then the sealing top cover is lifted to the top of the first carbonization unit; The gas generated by the carbonized raw materials in the first carbonization unit is ignited by preheating or using an external heat source, so that the temperature in the carbonization unit reaches the process set temperature, the first air intake pipe is opened, and the gas overflowing from the carbonization chamber is mixed with the inhaled air to cause combustion or partial combustion, and the flue gas generated by the combustion reaction goes downward, passes through the carbonization flue, and transfers the heat carried by the material in the carbonization chamber to heat and dry distill it, and then the flue gas is sent to the collecting flue through the perforation and the flue connection port, and the first carbonization unit enters the normal working state; The second carbonization unit loaded with carbonization raw materials is lifted by the automatic handling system and placed on another flue connection port of the collecting flue, and then the first carbonization unit and the sealing top cover that have entered the normal working state are placed on the second carbonization unit by the automatic handling system. The refractory shells of the two are sealed by a sealing gasket. Since the carbonization flues of the first carbonization unit and the second carbonization unit are connected, the flue gas from the first carbonization unit enters the carbonization flue of the second carbonization unit, and at the same time, the materials in the carbonization chamber of the second carbonization unit are heated and the overflowing gas is ignited until the second carbonization unit also enters the normal working state; Continue to place the carbonization unit and the sealed top cover that have entered the normal working state on the next carbonization unit to be heated, and repeat this operation so that all the carbonization units of all the combined carbonization furnaces on the flue are in the normal working state.

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