Device and control method for producing carbon sequestration stone by using CO2-containing industrial tail gas

Abstract

The application relates to a device and a control method for producing carbon fixation stone by using CO2-containing industrial tail gas, which comprises a carbonization bin body, a conveying device, a temperature control device, a concentration control device, a pressure control device and a control box; the carbonization bin body comprises a carbonization bin and four bin doors, the four bin doors divide the carbonization bin into three spaces, namely an inlet replacement chamber, a carbonization chamber and an outlet replacement chamber, and the four bin doors are respectively an inlet replacement chamber door, an inlet carbonization chamber door, an outlet carbonization chamber door and an outlet replacement chamber door. The device can accurately adjust reaction conditions such as temperature, gas concentration and gas pressure in the reaction process; the device has good airtightness and high stability, the reliability is high through software control of various experimental conditions in the reaction; continuous carbonization can be realized, the carbon fixation stone does not need to stop the device when entering and leaving the device, and the stability of the carbonization condition can be maintained.

Description

Technical Field

[0001] This invention relates to the field of environmental protection and carbonization equipment technology, and in particular to an apparatus and control method for producing solid carbonite using industrial tail gas containing CO2. Background Technology

[0002] The massive emission of greenhouse gases has led to global warming and climate change, which has a significant negative impact on the ecological environment. Greenhouse gases include water vapor, carbon dioxide, and most refrigerants. Therefore, controlling carbon emissions is one of the important means to mitigate global warming.

[0003] The reaction between steel slag in industrial solid waste and carbon dioxide in industrial exhaust gas requires certain conditions, such as reaction pressure, carbon dioxide concentration in the exhaust gas, and reaction temperature. Since most research on the carbonization reaction of steel slag is still in the laboratory stage, and commercially available equipment cannot accurately measure and control the reaction pressure, concentration, and temperature, nor can it achieve continuous production, there is an urgent need for a new type of equipment to accurately measure and control the reaction conditions such as reaction pressure, concentration, and temperature during the carbonization process, and to achieve continuous production. Summary of the Invention

[0004] The purpose of this invention is to provide an apparatus and control method for producing solid carbonite using industrial tail gas containing CO2, so as to achieve precise measurement and control of reaction conditions such as reaction pressure, concentration, and temperature during the carbonization process, and to realize continuous production.

[0005] To achieve the above objectives, this application employs the following technical solution:

[0006] An apparatus for producing solid carbonite using industrial tail gas containing CO2 includes a carbonization chamber, a conveying device, a temperature control device, a concentration control device, a pressure control device, and a control box.

[0007] The carbonization chamber includes a carbonization chamber and four doors. The four doors divide the carbonization chamber into three spaces: an inlet replacement chamber, a carbonization chamber, and an outlet replacement chamber. The four doors are the inlet replacement chamber door, the carbonization chamber door, the carbonization chamber door, and the outlet replacement chamber door.

[0008] The conveying device includes an inlet conveying device, an inlet replacement chamber conveying device, a carbonization chamber conveying device, an outlet replacement chamber conveying device, and an outlet conveying device. The inlet conveying device is located at the front end of the carbonization chamber, the inlet replacement chamber conveying device is located inside the inlet replacement chamber, the carbonization chamber conveying device is located inside the carbonization chamber, the outlet replacement chamber conveying device is located inside the outlet replacement chamber, and the outlet conveying device is located at the rear end of the carbonization device. The inlet conveying device, the inlet replacement chamber conveying device, the carbonization chamber conveying device, the outlet replacement chamber conveying device, and the outlet conveying device are connected end to end for conveying carbonaceous stone.

[0009] The temperature control device includes a temperature detection device, a heating device, and a cooling device. The temperature detection device is located on the side of the carbonization chamber, the cooling device is a water-cooled coil located in the upper part of the carbonization chamber, and the heating device is an electric heating tube located at the bottom of the carbonization chamber.

[0010] The concentration control device includes an inlet pipe, an outlet pipe, and a concentration detection device. The inlet pipe and the outlet pipe enter the carbonization chamber from the top of the carbonization chamber, and the concentration detection device is located on the side of the carbonization chamber.

[0011] The pressure control device includes an inlet pipe and an outlet pipe for a pressure detection device and a concentration control device, wherein the pressure detection device is located on the side of the carbonization chamber.

[0012] The control box includes a display screen and a data processing device. The display screen is used to display and control various experimental conditions, and the data processing device is used to receive signals from various sensors and control the operation of various devices.

[0013] Furthermore, both the inlet replacement chamber and the outlet replacement chamber are equipped with exhaust pipes, and each exhaust pipe is equipped with a solenoid valve for exhausting air.

[0014] Furthermore, each conveying part in the conveying device is equipped with a limit sensor to sense the position of the board and transmit the detection signal to the control box.

[0015] Furthermore, a drain outlet is provided at the bottom of the carbonization chamber to discharge the wastewater generated during the reaction process.

[0016] Furthermore, the water-cooling coil is equipped with a solenoid valve, and the electric heating tube is equipped with a solenoid switch. Both the solenoid valve and the solenoid switch are electrically connected to the control box.

[0017] Furthermore, both the air inlet pipe and the air outlet pipe are equipped with solenoid valves, which are electrically connected to the control box.

[0018] Furthermore, the air inlet pipe is connected to the air inlet fabric pipe, and the air outlet pipe is connected to the air outlet fabric pipe.

[0019] A control method for an apparatus for producing carbonaceous solids using CO2-containing industrial tail gas, comprising the following steps using any of the above-mentioned apparatus:

[0020] S1, close the inlet replacement chamber door, inlet carbonization chamber door, outlet carbonization chamber door and outlet replacement chamber door, and introduce pressurized industrial exhaust gas;

[0021] S2. Set the reaction temperature, gas pressure, gas concentration, and reaction time via the control box's display screen;

[0022] S3. Start running the equipment for the first set time to bring the conditions inside the device up to the preset conditions of step S2.

[0023] S4. Place the carbonite on the inlet conveying device. When the limit sensor detects that the carbonite has been placed in place, the solenoid valve of the inlet replacement chamber exhaust pipe opens, venting the gas from the inlet replacement chamber. The inlet replacement chamber door opens, and the inlet conveying device and the inlet replacement chamber conveying device start operating. After the limit sensor detects that the carbonite has completely entered the inlet replacement chamber, the inlet conveying device and the inlet replacement chamber conveying device stop operating, the solenoid valve of the inlet replacement chamber exhaust pipe closes, and the inlet replacement chamber door closes. The carbonization chamber door opens, and the inlet replacement chamber conveying device and the carbonization chamber conveying device start operating. After the limit sensor detects that the carbonite has completely entered the carbonization chamber, the inlet replacement chamber conveying device and the carbonization chamber conveying device stop operating, the carbonization chamber door closes, and the carbonization reaction begins.

[0024] S5. If the concentration detection device detects a decrease in the gas concentration in the carbonization chamber during the reaction process, the intake pipe solenoid valve opens to start gas intake. Once the preset concentration is reached, the intake pipe solenoid valve closes to stop gas intake. If the concentration detection device detects an increase in the gas concentration in the carbonization chamber during the reaction process, the exhaust pipe solenoid valve opens to start exhaust. Once the preset concentration is reached, the exhaust pipe solenoid valve closes to stop exhaust.

[0025] S6. If the pressure detection device detects a decrease in gas pressure in the carbonization chamber during the reaction process, the intake pipe solenoid valve opens to start gas intake. After reaching the preset pressure, the intake pipe solenoid valve closes to stop gas intake. If the pressure detection device detects an increase in gas pressure in the carbonization chamber during the reaction process, the exhaust pipe solenoid valve opens to start exhaust. After reaching the preset pressure, the exhaust pipe solenoid valve closes to stop exhaust.

[0026] S7. If the temperature detection device detects an increase in the gas temperature in the carbonization chamber during the reaction process, the water pump of the water-cooled coil will start running and stop running after reaching the preset temperature; if the temperature detection device detects a decrease in the gas temperature in the carbonization chamber during the reaction process, the electric heating tube will start heating and stop heating after reaching the preset temperature.

[0027] S8. After the reaction time is reached, the carbonization chamber door opens, and the carbonization chamber conveying device and the outlet replacement chamber conveying device start operating. After the limit sensor detects that the solidified carbon has completely entered the outlet replacement chamber, the carbonization chamber conveying device and the outlet replacement chamber conveying device stop operating, and the carbonization chamber door closes. The inlet replacement chamber exhaust pipe solenoid valve opens, discharging the inlet replacement chamber gas. The outlet replacement chamber exhaust pipe solenoid valve opens, discharging the outlet replacement chamber gas. The outlet replacement chamber door opens, and the outlet replacement chamber conveying device and the outlet conveying device start operating. After the limit sensor detects that the solidified carbon has completely exited the outlet replacement chamber, the outlet replacement chamber conveying device and the outlet conveying device stop operating, the outlet replacement chamber door opens, and the carbonization reaction is complete.

[0028] The beneficial effects of this invention are:

[0029] 1. The device can precisely adjust reaction conditions such as temperature, gas concentration, and gas pressure during the reaction process.

[0030] 2. The apparatus has good airtightness and high stability. The experimental conditions in the reaction are controlled by software, which ensures high reliability.

[0031] 3. The device can achieve continuous carbonization, and the carbonite can enter and exit the device without stopping the machine, thus maintaining stable carbonization conditions. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the continuous carbonization device for producing solid carbonite using industrial tail gas containing CO2, according to the present invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Inlet conveyor; 2. Inlet replacement chamber conveyor; 3. Carbonization chamber conveyor; 4. Outlet replacement chamber conveyor; 5. Outlet conveyor; 6. Inlet replacement chamber door; 7. Inlet carbonization chamber door; 8. Outlet carbonization chamber door; 9. Outlet replacement chamber door; 10. Inlet replacement chamber exhaust pipe; 11. Outlet replacement chamber exhaust pipe; 12. Inlet pipe; 13. Outlet pipe; 14. Circulating fan; 15. Inlet air distribution pipe; 16. Outlet air distribution pipe; 17. Cooling device; 18. Heating device; 20. Drain outlet; 23. Concentration detection device; 24. Temperature detection device; 25. Pressure detection device; 26. Inlet replacement chamber; 27. Carbonization chamber; 28. Outlet replacement chamber. Detailed Implementation

[0035] It should be noted that the following detailed descriptions are exemplary and intended to provide further illustration of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0036] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms “comprising” and / or “including” are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0037] like Figure 1 As shown, this application provides an apparatus for producing solid carbon using industrial tail gas containing CO2, including a carbonization chamber, a conveying device, a temperature control device, a concentration control device, a pressure control device, and a control box.

[0038] The carbonization chamber of this application includes a carbonization chamber and four chamber doors. The four chamber doors divide the carbonization chamber into three spaces: an inlet conversion chamber, a carbonization chamber, and an outlet replacement chamber. The four chamber doors, from left to right, are the inlet replacement chamber door, the inlet carbonization chamber door, the outlet carbonization chamber door, and the outlet replacement chamber door.

[0039] The conveying system includes an inlet conveying device 1, an inlet replacement chamber conveying device 2, a carbonization chamber conveying device 3, an outlet replacement chamber conveying device 4, and an outlet conveying device 5. The inlet conveying device 1 is located at the front end of the carbonization chamber, the inlet replacement chamber conveying device 2 is located inside the inlet replacement chamber 26, the carbonization chamber conveying device 3 is located inside the carbonization chamber 27, the outlet replacement chamber conveying device 4 is located inside the outlet replacement chamber 28, and the outlet conveying device 5 is located at the rear end of the carbonization unit. The inlet conveying device 1, inlet replacement chamber conveying device 2, carbonization chamber conveying device 3, outlet replacement chamber conveying device 4, and outlet conveying device 5 are connected end-to-end for conveying carbonaceous stones.

[0040] The temperature control device includes a temperature detection device 24, a heating device, and a cooling device. The temperature detection device 24 is located on the side of the carbonization chamber 27. The cooling device 17 is a water-cooled coil located in the upper part of the carbonization chamber 27. The heating device 18 is an electric heating tube located in the bottom of the carbonization chamber 27.

[0041] The concentration control device includes an inlet pipe 12, an outlet pipe 13, and a concentration detection device 23. The inlet pipe 12 and the outlet pipe 13 enter the carbonization chamber 27 from the upper part of the carbonization chamber, and the concentration detection device 23 is located on the side of the carbonization chamber 27.

[0042] The pressure control device includes an inlet pipe and an outlet pipe for a pressure detection device and a concentration control device. The pressure detection device is located on the side of the carbonization chamber.

[0043] The control box includes a display screen and a data processing module. The display screen can show and control various experimental conditions, and the data processing module can receive signals from various sensors and control the operation of various devices.

[0044] The inlet replacement chamber 26 and the outlet replacement chamber 28 are equipped with an inlet replacement chamber exhaust pipe 10 and an outlet replacement chamber exhaust pipe 11, respectively. Both the inlet replacement chamber exhaust pipe 10 and the outlet replacement chamber exhaust pipe 11 are equipped with solenoid valves for exhaust. The carbonization chamber body has a drain outlet 20 located at the bottom of the carbonization chamber 27, used to discharge wastewater generated during the reaction process. The inlet pipe 12 and the outlet pipe 13 are connected to the outside of the carbonization chamber via a circulating fan 14 to maintain gas circulation within the carbonization equipment. The inlet pipe 12 and the outlet pipe 13 are respectively connected to the inlet gas distribution pipe 15 and the outlet gas distribution pipe 16 to maintain uniform gas distribution within the carbonization chamber.

[0045] The control method of this device includes the following steps:

[0046] S1. Close the inlet replacement chamber door 6, the inlet carbonization chamber door 7, the outlet carbonization chamber door 8, and the outlet replacement chamber door 9, and introduce pressurized industrial exhaust gas.

[0047] S2. Set the reaction temperature, gas pressure, gas concentration, and reaction time via the control box's display screen.

[0048] S3. Start running the equipment for 30 minutes to bring the internal conditions of the device up to the preset conditions of step S2.

[0049] S4. Place the carbonite on the inlet conveying device 1. When the limit sensor detects that the carbonite has been placed in place, the solenoid valve of the inlet replacement chamber exhaust pipe 10 opens, discharging the gas from the inlet replacement chamber 26. The inlet replacement chamber door 6 opens, and the inlet conveying device 1 and the inlet replacement chamber conveying device 2 begin to operate. After the limit sensor detects that the carbonite has completely entered the inlet replacement chamber 26, the inlet conveying device 1 and the inlet replacement chamber conveying device 2 stop operating, the solenoid valve of the inlet replacement chamber exhaust pipe 10 closes, and the inlet replacement chamber door 6 closes. The carbonization chamber door 7 opens, and the inlet replacement chamber conveying device 2 and the carbonization chamber conveying device 3 begin to operate. After the limit sensor detects that the carbonite has completely entered the carbonization chamber 27, the inlet replacement chamber conveying device 2 and the carbonization chamber conveying device 3 stop operating, the carbonization chamber door 7 closes, and the carbonization reaction begins.

[0050] S5. If the concentration detection device 23 detects a decrease in the gas concentration in the carbonization chamber 27 during the reaction process, the solenoid valve of the inlet pipe 12 opens to start gas intake. After the preset concentration is reached, the solenoid valve of the inlet pipe 12 closes to stop gas intake. If the concentration detection device 23 detects an increase in the gas concentration in the carbonization chamber 27 during the reaction process, the solenoid valve of the outlet pipe 13 opens to start gas exhaust. After the preset concentration is reached, the solenoid valve of the outlet pipe 13 closes to stop gas exhaust.

[0051] S6. If the pressure detection device 25 detects a decrease in gas pressure in the carbonization chamber 27 during the reaction process, the solenoid valve of the inlet pipe 12 opens to start gas intake. After reaching the preset pressure, the solenoid valve of the inlet pipe 12 closes to stop gas intake. If the pressure detection device 25 detects an increase in gas pressure in the carbonization chamber 27 during the reaction process, the solenoid valve of the outlet pipe 13 opens to start gas exhaust. After reaching the preset pressure, the solenoid valve of the outlet pipe 13 closes to stop gas exhaust.

[0052] S7. If the temperature detection device 24 detects an increase in the gas temperature inside the carbonization chamber 27 during the reaction process, the water pump of the cooling device 17 starts running and stops running after reaching the preset temperature; if the temperature detection device 24 detects a decrease in the gas temperature inside the carbonization chamber 27 during the reaction process, the electric heating tube used by the heating device 18 starts heating and stops heating after reaching the preset temperature.

[0053] S8. After the reaction time is reached, the carbonization chamber door 8 opens, and the carbonization chamber conveying device 3 and the outlet replacement chamber conveying device 4 start operating. After the limit sensor detects that the solidified carbon has completely entered the outlet replacement chamber 28, the carbonization chamber conveying device 3 and the outlet replacement chamber conveying device 4 stop operating, and the carbonization chamber door 8 closes. The solenoid valve of the inlet replacement chamber exhaust pipe 10 opens, and the gas in the inlet replacement chamber 26 is discharged. The solenoid valve of the outlet replacement chamber exhaust pipe 11 opens, and the gas in the outlet replacement chamber 28 is discharged. The outlet replacement chamber door 9 opens, and the outlet replacement chamber conveying device 4 and the outlet conveying device 5 start operating. After the limit sensor detects that the solidified carbon has completely exited the outlet replacement chamber 28, the outlet replacement chamber conveying device 4 and the outlet conveying device 5 stop operating, and the outlet replacement chamber door 9 closes. The carbonization reaction is complete.

[0054] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A continuous carbonization device for producing solid carbonite using CO2-containing tail gas, characterized in that, It includes a carbonization chamber, a conveying device, a temperature control device, a concentration control device, a pressure control device, and a control box; The carbonization chamber includes a carbonization chamber and four doors. The four doors divide the carbonization chamber into three spaces: an inlet replacement chamber, a carbonization chamber, and an outlet replacement chamber. The four doors are the inlet replacement chamber door, the carbonization chamber door, the carbonization chamber door, and the outlet replacement chamber door. The conveying device includes an inlet conveying device, an inlet replacement chamber conveying device, a carbonization chamber conveying device, an outlet replacement chamber conveying device, and an outlet conveying device. The temperature control device includes a temperature detection device, a heating device, and a cooling device; The concentration control device includes an inlet pipe, an outlet pipe, and a concentration detection device. The pressure control device includes a pressure detection device and an air inlet pipe and an air outlet pipe for a concentration control device; The control box includes a display screen and a data processing device; The inlet replacement chamber and the outlet replacement chamber are respectively equipped with an inlet replacement chamber exhaust pipe and an outlet replacement chamber exhaust pipe; Each conveying part of the conveying device is equipped with a limit sensor to sense the position of the carbonaceous stone and transmit the detection signal to the control box. The air inlet pipe is connected to the air inlet cloth pipe, and the air outlet pipe is connected to the air outlet cloth pipe. The inlet conveying device is located at the front end of the carbonization chamber, the inlet replacement chamber conveying device is located inside the inlet replacement chamber, the carbonization chamber conveying device is located inside the carbonization chamber, the outlet replacement chamber conveying device is located inside the outlet replacement chamber, and the outlet conveying device is located at the rear end of the carbonization chamber. The inlet conveying device, the inlet replacement chamber conveying device, the carbonization chamber conveying device, the outlet replacement chamber conveying device, and the outlet conveying device are connected end to end for conveying carbonite. The temperature detection device is located on the side of the carbonization chamber, the cooling device is a water-cooled coil located in the upper part of the carbonization chamber, and the heating device is an electric heating tube located at the bottom of the carbonization chamber. The air inlet pipe and air outlet pipe enter the carbonization chamber from the top of the carbonization chamber, and the concentration detection device is located on the side of the carbonization chamber; The pressure detection device is located on the side of the carbonization chamber; The display screen is used to display and control various experimental conditions, and the data processing device is used to receive signals from various sensors and control the operation of various devices. The water-cooling coil is equipped with a solenoid valve, and the electric heating tube is equipped with a solenoid switch. Both the solenoid valve and the solenoid switch are electrically connected to the control box. Both the air inlet pipe and the air outlet pipe are equipped with solenoid valves, which are electrically connected to the control box.

2. The continuous carbonization apparatus for producing solid carbonite using CO2-containing tail gas according to claim 1, characterized in that, Both the inlet replacement chamber exhaust pipe and the outlet replacement chamber exhaust pipe are equipped with solenoid valves for exhaust.

3. The continuous carbonization device for producing solid carbonite using CO2-containing tail gas according to claim 1, characterized in that, A drain outlet is provided at the bottom of the carbonization chamber.

4. A control method for a continuous carbonization apparatus for producing solid carbon using CO2-containing tail gas, comprising the apparatus described in any one of claims 1 to 3, characterized in that, Includes the following steps: S1. Close the inlet replacement chamber door, the inlet carbonization chamber door, the outlet carbonization chamber door, and the outlet replacement chamber door, and introduce pressurized exhaust gas containing CO2; S2. Set the reaction temperature, gas pressure, gas concentration, and reaction time via the control box's display screen; S3. Start running the equipment for the first set time to bring the conditions inside the device up to the preset conditions of step S2. S4. Place the carbonite on the inlet conveying device. When the limit sensor detects that the carbonite has been placed in place, the solenoid valve of the inlet replacement chamber exhaust pipe opens, venting the gas from the inlet replacement chamber. The inlet replacement chamber door opens, and the inlet conveying device and the inlet replacement chamber conveying device start operating. After the limit sensor detects that the carbonite has completely entered the inlet replacement chamber, the inlet conveying device and the inlet replacement chamber conveying device stop operating, the solenoid valve of the inlet replacement chamber exhaust pipe closes, and the inlet replacement chamber door closes. The carbonization chamber door opens, and the inlet replacement chamber conveying device and the carbonization chamber conveying device start operating. After the limit sensor detects that the carbonite has completely entered the carbonization chamber, the inlet replacement chamber conveying device and the carbonization chamber conveying device stop operating, the carbonization chamber door closes, and the carbonization reaction begins. S5. If the concentration detection device detects a decrease in the gas concentration in the carbonization chamber during the reaction process, the inlet solenoid valve opens to start gas intake. Once the preset concentration is reached, the inlet solenoid valve closes to stop gas intake. If the concentration detection device detects an increase in the gas concentration in the carbonization chamber during the reaction process, the outlet solenoid valve opens to start gas exhaust. Once the preset concentration is reached, the outlet solenoid valve closes to stop gas exhaust. S6. If the pressure detection device detects a decrease in gas pressure in the carbonization chamber during the reaction process, the inlet solenoid valve opens to start gas intake. Once the preset pressure is reached, the inlet solenoid valve closes to stop gas intake. If the pressure detection device detects an increase in gas pressure in the carbonization chamber during the reaction process, the outlet solenoid valve opens to start gas exhaust. Once the preset pressure is reached, the outlet solenoid valve closes to stop gas exhaust. S7. If the temperature detection device detects an increase in the gas temperature in the carbonization chamber during the reaction process, the water pump of the water-cooled coil will start running and stop running after reaching the preset temperature; if the temperature detection device detects a decrease in the gas temperature in the carbonization chamber during the reaction process, the electric heating tube will start heating and stop heating after reaching the preset temperature. S8. After the reaction time is reached, the carbonization chamber door opens, and the carbonization chamber conveying device and the outlet replacement chamber conveying device start operating. After the limit sensor detects that the solidified carbon has completely entered the outlet replacement chamber, the carbonization chamber conveying device and the outlet replacement chamber conveying device stop operating, and the carbonization chamber door closes. The inlet replacement chamber exhaust pipe solenoid valve opens to discharge the inlet replacement chamber gas. The outlet replacement chamber exhaust pipe solenoid valve opens to discharge the outlet replacement chamber gas. The outlet replacement chamber door opens, and the outlet replacement chamber conveying device and the outlet conveying device start operating. After the limit sensor detects that the solidified carbon has completely exited the outlet replacement chamber, the outlet replacement chamber conveying device and the outlet conveying device stop operating, and the outlet replacement chamber door closes. The carbonization reaction is complete.

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