A composite furnace device for converting carbon dioxide and a method of using the same

Abstract

The present invention discloses a composite furnace device for converting carbon dioxide, including a furnace body, wherein the top and bottom of the furnace body are respectively provided with a carbon material raw material feeding port and a carbon material raw material discharging device, and the furnace body is sequentially provided with a preheating section, a dry distillation section, a reaction section, and a cooling section from top to bottom, and the furnace body side walls corresponding to the dry distillation section and the reaction section are connected with an air intake device, and the bottom of the furnace body side wall corresponding to the cooling section is connected with a carbon dioxide feeding device, and the furnace body side walls corresponding to the dry distillation section and the reaction section are connected with a reaction section gas exhaust pipe, and the furnace body top is also provided with an exhaust gas exhaust pipe, and the reaction section gas exhaust pipe is connected to the exhaust gas exhaust pipe through a pipeline, and the furnace body side walls corresponding to the dry distillation section, the reaction section, and the cooling section are provided with thermocouples. The present invention utilizes the waste heat of a blue charcoal furnace to convert carbon dioxide, and solves the problems of a large amount of heat loss in the industrial process of making coke or blue charcoal from coal and high heat consumption in the process of converting carbon dioxide in the prior art.

Description

Technical Field

[0001] The present invention belongs to the technical field of carbon emission reduction and coal coking equipment, and relates to a composite furnace device for converting carbon dioxide. The present invention also relates to a method for using the composite furnace device. Background Art

[0002] The research and development of carbon dioxide emission reduction technology at home and abroad mainly focuses on two aspects. The first is to control the source and reduce the generation of carbon dioxide, but due to the distribution of raw materials and fuels, it is difficult to achieve full coverage. The second is to capture the carbon dioxide in the exhaust gas and seal it or make it into products such as dry ice, but the biggest problem with this technology is that the carbon dioxide knowledge has undergone a physical form transformation and has not fundamentally achieved carbon dioxide emission reduction.

[0003] The reaction of carbon dioxide and carbon to produce carbon monoxide is feasible in principle, but the reaction is endothermic and requires the absorption of a large amount of heat energy. In other words, it is not economical to directly heat carbon to reduce carbon dioxide to produce carbon monoxide. In the industrial process of making coke or semi-coke from coal, the reaction temperature is high, and the coke or semi-coke produced is generally cooled by water quenching, which not only causes a large amount of heat loss, but also seriously wastes water resources. It has become extremely urgent and important to seek a suitable process device to achieve waste heat recovery and carbon emission reduction. Summary of the invention

[0004] The purpose of the present invention is to provide a composite furnace device for converting carbon dioxide, which utilizes the waste heat of a blue charcoal furnace to convert carbon dioxide, thereby solving the problems of large amounts of heat loss in the industrial process of making coke or blue charcoal from coal and high heat consumption in the process of converting carbon dioxide in the prior art.

[0005] Another object of the present invention is to provide a method for using a composite furnace device for converting carbon dioxide.

[0006] The technical solution adopted by the present invention is a composite furnace device for converting carbon dioxide, including a furnace body, a carbon raw material feeding port is arranged on the top of the furnace body, a carbon raw material discharging device is arranged on the bottom of the furnace body, and the furnace body is sequentially arranged from top to bottom as a preheating section, a dry distillation section, a reaction section, and a cooling section. The side walls of the furnace body corresponding to the dry distillation section and the reaction section are connected with air intake devices, the bottom of the side walls of the furnace body corresponding to the cooling section is connected with a carbon dioxide feeding device, the side walls of the furnace body corresponding to the dry distillation section and the reaction section are connected with a reaction section gas exhaust pipe, and a tail gas exhaust pipe is also arranged on the top of the furnace body. The reaction section gas exhaust pipe is connected to the tail gas exhaust pipe or the carbon monoxide recovery and application device through a pipeline, and thermocouples are arranged on the side walls of the furnace body corresponding to the dry distillation section, the reaction section, and the cooling section.

[0007] The present invention is also characterized in that

[0008] A carbon material raw material silo and a carbon material raw material feeding hopper are arranged on the top of the furnace body from bottom to top, and gate valves are arranged between the furnace body and the carbon material raw material silo and between the carbon material raw material silo and the carbon material feeding hopper.

[0009] The air intake device includes a mixed gas inlet pipe arranged on the outside of the furnace body of the distillation section and the reaction section, and a plurality of mixed gas branch pipes are arranged from bottom to top on the side walls of the furnace body corresponding to the distillation section and the reaction section. The mixed gas inlet pipes of the distillation section and the reaction section are respectively connected to the mixed gas branch pipes of the corresponding sections. A plurality of heating holes are arranged on the side wall of the furnace body at a position corresponding to each mixed gas branch pipe. The heating holes are connected to the corresponding mixed gas branch pipes, and the channels of the heating holes are arranged to be inclined downward.

[0010] Mixed gas branch pipes are arranged on the two side walls corresponding to the furnace body of the dry distillation section and the reaction section.

[0011] The carbon dioxide feeding device includes a carbon dioxide inlet pipe with two ends respectively located inside and outside the furnace body and a circle of carbon dioxide delivery pipe arranged around the outer wall of the furnace body. The carbon dioxide inlet pipe and the carbon dioxide delivery pipe are connected. A plurality of carbon dioxide outlet nozzles are evenly arranged on the side of the carbon dioxide delivery pipe facing the furnace body. The carbon dioxide outlet nozzles extend into the furnace body and are arranged to be tilted downward.

[0012] The reaction stage gas exhaust pipe includes an exhaust main pipe with two ends respectively located inside and outside the furnace body and a circle of gas collecting pipes arranged around the outer wall of the furnace body. The exhaust main pipe is connected to the gas collecting pipe. A plurality of gas collecting branch pipes are evenly arranged on the side of the gas collecting pipe facing the furnace body. The gas collecting branch pipes extend into the furnace body. The exhaust main pipe is connected to the tail gas exhaust pipe or the carbon monoxide recovery and application device, and the gas collecting branch pipes are arranged to be inclined downward.

[0013] A valve is also provided on the exhaust manifold.

[0014] A heat insulating protective layer is also provided on the outside of the furnace body.

[0015] The carbon material raw material discharging device comprises a plurality of discharging gate valves arranged at the bottom end of the furnace body.

[0016] Another technical solution adopted by the present invention is a method for using a composite furnace device for converting carbon dioxide, using the composite furnace device for converting carbon dioxide, and the specific process is as follows:

[0017] When in use, open the two gate valves, and then add carbon raw materials into the furnace body through the carbon raw material feeding hopper so that the furnace body is filled with carbon raw materials. When putting the carbon raw materials into the furnace body, put flammable fuel at the position corresponding to the mixed gas inlet of the heating section at the same time, and then close the two gate valves, extend the ignition rod into the mixed gas inlet pipe to ignite the carbon raw materials in the furnace body, and then connect the mixed gas pipe conveying the mixture of coal gas and air to the mixed gas inlet pipe through a threaded short circuit. When the carbon raw materials in the furnace body are ignited, start to introduce the mixed gas into the furnace, adjust the proportion of the mixed gas, so that the carbon raw materials in the furnace body are in a flameless smoldering state, set thermocouples in the reaction section, distillation section and cooling section of the furnace body to facilitate observation of the temperature in the furnace, observe the temperature in the furnace through the thermocouples on the furnace body, and when the temperature in the reaction section When it reaches 800°C, carbon dioxide is introduced into the cooling section of the furnace body through the carbon dioxide inlet pipe. When the temperature of the reaction section gradually rises to 1000°C, the temperature of the distillation section is observed, and the temperature of the distillation section is controlled at 600-800°C by introducing the mixed gas into the mixed gas inlet pipe corresponding to the distillation section. During operation, gas is taken out through the valve at regular intervals to detect the gas composition. When the carbon monoxide concentration reaches 90%, the valve is opened, and the reaction section gas is mixed with the gas in the exhaust pipe or passed to the carbon monoxide recovery application device for further recovery and treatment. As the carbon monoxide is continuously supplied to the cooling section in the furnace through the carbon oxide inlet pipe, when the temperature of the cooling section is lower than 100°C, the carbon material raw material discharging device is opened to discharge the blue coke. The temperature of the cooling section is observed in time during discharge, and it is stopped in time when it is greater than 100°C.

[0018] The beneficial effects of the present invention are:

[0019] The present invention makes full use of the waste heat in the semi-coke cooling process in the process of coal-to-semi-coke production, realizes the conversion of carbon dioxide to produce carbon monoxide, solves the agglomeration problem in the high-temperature dry distillation of coal, and simultaneously solves or reduces the semi-coke wastewater problem in the water quenching process in the production of coal-to-semi-coke. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a composite furnace device for converting carbon dioxide according to the present invention;

[0021] Figure 2 yes Figure 1 AA view;

[0022] Figure 3 It is a structural schematic diagram of an air intake device in a composite furnace device for converting carbon dioxide according to the present invention;

[0023] Figure 4 It is a schematic diagram of the structure of a heating hole in a composite furnace device for converting carbon dioxide according to the present invention;

[0024] Figure 5It is a structural schematic diagram of a carbon dioxide feeding device in a composite furnace device for converting carbon dioxide according to the present invention;

[0025] Figure 6 The present invention is a schematic diagram of the structure of a reaction section gas exhaust pipe in a composite furnace device for converting carbon dioxide.

[0026] In the figure, 1. furnace body, 2. carbon material raw material feeding port, 3. carbon material raw material discharging device, 4. air intake device, 5. carbon dioxide feeding device, 6. reaction stage gas exhaust pipe, 7. tail gas exhaust pipe, 8. carbon material raw material silo, 9. carbon material raw material feeding hopper, 10. gate valve, 11. furnace body insulation layer, 12. discharging gate valve;

[0027] 4-1. Mixed gas inlet pipe, 4-2. Mixed gas branch pipe, 4-3. Heating hole;

[0028] 5-1. Carbon dioxide inlet pipe, 5-2. Carbon dioxide delivery pipe, 5-3. Carbon dioxide outlet nozzle;

[0029] 6-1. Exhaust main pipe, 6-2. Gas collecting pipe, 6-3. Gas collecting branch pipe, 6-4. Valve. DETAILED DESCRIPTION

[0030] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0031] The present invention provides a composite furnace device for converting carbon dioxide, the structure of which is as follows Figure 1-2 As shown, it includes a furnace body 1, a carbon material raw material feeding port 2 is arranged on the top of the furnace body 1, a carbon material raw material discharging device 3 is arranged at the bottom of the furnace body 1, and the furnace body 1 is sequentially arranged as a preheating section, a dry distillation section, a reaction section, and a cooling section from top to bottom. The side walls of the furnace body 1 corresponding to the dry distillation section and the reaction section are connected with an air intake device 4, and the bottom of the side wall of the furnace body 1 corresponding to the cooling section is connected with a carbon dioxide feeding device 5, and the side walls of the furnace body 1 corresponding to the dry distillation section and the reaction section are connected with a reaction section gas exhaust pipe 6, and a tail gas exhaust pipe 7 is also arranged on the top of the furnace body 1. The reaction section gas exhaust pipe 6 is connected to the tail gas exhaust pipe 7 or connected to a carbon monoxide recovery and application device through a pipeline, and thermocouples are arranged on the side walls of the furnace body 1 corresponding to the dry distillation section, the reaction section, and the cooling section.

[0032] A carbon material raw material silo 8 and a carbon material raw material feeding hopper 9 are sequentially arranged on the top of the furnace body 1 from bottom to top, and gate valves 10 are arranged between the furnace body 1 and the carbon material raw material silo 8 and between the carbon material raw material silo 8 and the carbon material feeding hopper 9.

[0033] like Figure 3-4As shown, the air intake device 4 includes a mixed gas inlet pipe 4-1 arranged on the outer side of the furnace body of the distillation section and the reaction section, and a plurality of mixed gas branch pipes 4-2 are arranged from bottom to top on the side walls of the furnace body corresponding to the distillation section and the reaction section. The mixed gas inlet pipes 4-1 of the distillation section and the reaction section are respectively connected to the mixed gas branch pipes 4-2 of the corresponding sections, and a plurality of heating holes 4-3 are arranged on the side wall of the furnace body at the position corresponding to each mixed gas branch pipe 4-2. The heating holes 4-3 are connected to the corresponding mixed gas branch pipes 4-2, and the channels of the heating holes 4-3 are arranged to be inclined downward.

[0034] Mixed gas branch pipes 4-2 are provided on the corresponding side walls of the dry distillation section and the reaction section furnace body.

[0035] like Figure 5 As shown, the carbon dioxide feeding device 5 includes a carbon dioxide inlet pipe 5-1 with two ends respectively located inside and outside the furnace body 1 and a circle of carbon dioxide delivery pipe 5-2 arranged around the outer wall of the furnace body 1. The carbon dioxide inlet pipe 5-1 is connected to the carbon dioxide delivery pipe 5-2. A plurality of carbon dioxide outlet nozzles 5-3 are evenly arranged on the side of the carbon dioxide delivery pipe 5-2 facing the furnace body 1. The carbon dioxide outlet nozzles 5-3 extend into the furnace body 1, and the carbon dioxide outlet nozzles 5-3 are arranged to be tilted downward.

[0036] like Figure 6 As shown, the reaction stage gas exhaust pipe 6 includes an exhaust main pipe 6-1 whose two ends are respectively located inside and outside the furnace body 1 and a circle of gas collecting pipes 6-2 arranged around the outer wall of the furnace body 1. The exhaust main pipe 6-1 is connected to the gas collecting pipe 6-2. A plurality of gas collecting branch pipes 6-3 are evenly arranged on the side of the gas collecting pipe 6-2 facing the furnace body 1. The gas collecting branch pipes 6-3 extend into the furnace body 1. The exhaust main pipe 6-1 is connected to the tail gas exhaust pipe 7 or the carbon monoxide recovery application device, and the gas collecting branch pipes 6-3 are arranged to be inclined downward.

[0037] A valve 6-4 is also provided on the exhaust manifold 6-1.

[0038] A heat insulating protective layer 11 is also provided on the outside of the furnace body 1 , and the gas collecting pipe 6 - 2 , the carbon dioxide delivery pipe 5 - 2 and the mixed gas branch pipe 4 - 2 are all wrapped in the heat insulating protective layer 11 .

[0039] The carbon material discharge device 3 includes a plurality of discharge gate valves 12 arranged at the bottom end of the furnace body 1 .

[0040] A plurality of thermocouples are evenly arranged on the side walls of the furnace body 1 corresponding to the dry distillation section, the reaction section and the cooling section. The thermocouple of the cooling section is arranged at the bottom end of the side wall of the furnace body 1 corresponding to the cooling section.

[0041] The furnace body of the present invention is cylindrical or square cylindrical in shape.

[0042] When a composite furnace device for converting carbon dioxide is used, two gate valves 10 are opened, and then carbon raw materials are added into the furnace body 1 through the carbon raw material feeding hopper 9, so that the interior of the furnace body 1 is filled with carbon raw materials. When the carbon raw materials are put into the furnace body 1, flammable fuel is put into the position corresponding to the mixed gas inlet 4-1 of the heating section at the same time, and then the two gate valves 10 are closed, and the carbon raw materials in the furnace body 1 are ignited by extending the ignition rod into the mixed gas inlet 4-1, and then the mixed gas pipe for conveying the mixture of coal gas and air is connected to the mixed gas inlet pipe 4-1 through a threaded short circuit. When the carbon raw materials in the furnace body 1 are ignited, the mixed gas is started to be introduced into the furnace, and the ratio of the mixed gas is adjusted so that the carbon raw materials in the furnace body are in a flameless smoldering state. The reaction section, the distillation section and the cooling section of the furnace body 1 are provided with thermocouples to facilitate observation of the temperature in the furnace, and the temperature in the furnace is observed through the thermocouples on the furnace body. Temperature, when the temperature of the reaction section reaches 800°C, carbon dioxide is introduced into the cooling section of the furnace body through the carbon dioxide inlet pipe 5-1. When the temperature of the reaction section gradually rises to 1000°C, the temperature of the distillation section is observed, and the temperature of the distillation section is controlled at 600-800°C by introducing the mixed gas into the mixed gas inlet pipe 4-1 corresponding to the distillation section. During operation, gas is taken out through valve 6-4 at intervals to detect the gas composition. When the carbon monoxide concentration reaches 90%, valve 6-4 is opened, and the reaction section gas is mixed with the gas in the exhaust pipe 7 or passed to the carbon monoxide recovery and application device for further recovery and treatment. As the carbon monoxide is continuously fed to the cooling section in the furnace through the carbon oxide inlet pipe 5-1, when the temperature of the cooling section is lower than 100°C, the carbon material raw material discharging device 3 is opened to discharge the blue carbon. The temperature of the cooling section is observed in time during discharge, and when it is greater than 100°C, it is stopped in time.

[0043] The carbon material raw material silo 8 between the two gate valves 10 of the present invention is filled with carbon material raw materials during operation, forming a material seal to prevent external air from entering.

[0044] The rising carbon dioxide gas in the cooling section exchanges heat with the hot carbon material after the reaction, thereby achieving the purpose of preheating the carbon dioxide and cooling the carbon material.

Claims

1. A method for converting carbon dioxide using a composite furnace device, characterized in that: The composite furnace device comprises a furnace body, the top of the furnace body is provided with a carbon material raw material feeding port, the bottom of the furnace body is provided with a carbon material raw material discharging device, the furnace body is sequentially provided with a preheating section, a dry distillation section, a reaction section, and a cooling section from top to bottom, the side walls of the furnace body corresponding to the dry distillation section and the reaction section are connected with an air intake device, the bottom of the side wall of the furnace body corresponding to the cooling section is connected with a carbon dioxide feeding device, the side walls of the furnace body corresponding to the dry distillation section and the reaction section are connected with a reaction section gas exhaust pipe, the top of the furnace body is also provided with a tail gas exhaust pipe, the reaction section gas exhaust pipe is connected to the tail gas exhaust pipe or connected to a carbon monoxide recovery and application device through a pipeline, and the side walls of the furnace body corresponding to the dry distillation section, the reaction section, and the cooling section are provided with thermocouples; A carbon material raw material silo and a carbon material raw material feeding hopper are arranged on the top of the furnace body from bottom to top, and gate valves are arranged between the furnace body and the carbon material raw material silo and between the carbon material raw material silo and the carbon material feeding hopper; The air intake device comprises a mixed gas inlet pipe arranged outside the furnace body of the dry distillation section and the reaction section, and a plurality of mixed gas branch pipes are arranged from bottom to top on the furnace body side walls corresponding to the dry distillation section and the reaction section, the mixed gas inlet pipes of the dry distillation section and the reaction section are respectively connected to the mixed gas branch pipes of the corresponding sections, a plurality of heating holes are arranged on the furnace body side wall at positions corresponding to each mixed gas branch pipe, the heating holes are connected to the corresponding mixed gas branch pipes, and the channels of the heating holes are arranged to be inclined downward; Mixed gas branch pipes are provided on both side walls corresponding to the furnace body of the dry distillation section and the reaction section; The carbon dioxide feeding device comprises a carbon dioxide inlet pipe with two ends respectively located inside and outside the furnace body and a circle of carbon dioxide delivery pipe arranged around the outer wall of the furnace body, the carbon dioxide inlet pipe is connected to the carbon dioxide delivery pipe, and a plurality of carbon dioxide outlet nozzles are evenly arranged on the side of the carbon dioxide delivery pipe facing the furnace body, the carbon dioxide outlet nozzles extend into the furnace body, and the carbon dioxide outlet nozzles are arranged to be tilted downward; The reaction stage gas exhaust pipe comprises an exhaust main pipe with two ends respectively located inside and outside the furnace body and a circle of gas collecting pipes arranged around the outer wall of the furnace body, the exhaust main pipe is connected to the gas collecting pipe, a plurality of gas collecting branch pipes are evenly arranged on the side of the gas collecting pipe facing the furnace body, the gas collecting branch pipes extend into the furnace body, the exhaust main pipe is connected to the tail gas exhaust pipe or the carbon monoxide recovery and application device, and the gas collecting branch pipes are arranged to be tilted downward; A valve is also provided on the exhaust manifold; The carbon material raw material discharging device includes a plurality of discharging gate valves arranged at the bottom end of the furnace body; The method for converting carbon dioxide is specifically as follows: open two gate valves, and then add carbon raw materials into the furnace body through the carbon raw material feeding hopper so that the furnace body is filled with carbon raw materials, and when putting the carbon raw materials into the furnace body, put flammable fuel at the position of the mixed gas inlet pipe corresponding to the heating section, and then close the two gate valves, extend the ignition rod into the mixed gas inlet pipe to ignite the carbon raw materials in the furnace body, and then connect the mixed gas pipe conveying the mixture of coal gas and air with the mixed gas inlet pipe through a threaded short circuit, and when the carbon raw materials in the furnace body are ignited, start to introduce the mixed gas into the furnace, adjust the ratio of the mixed gas, so that the carbon raw materials in the furnace body are in a flameless smoldering state, set thermocouples in the reaction section, distillation section and cooling section of the furnace body to facilitate observation of the temperature in the furnace, observe the temperature in the furnace through the thermocouples on the furnace body, and when the reaction When the temperature of the section reaches 800℃, carbon dioxide is introduced into the cooling section in the furnace body through the carbon dioxide inlet pipe. When the temperature of the reaction section gradually rises to 1000℃, the temperature of the distillation section is observed, and the temperature of the distillation section is controlled at 600-800℃ by introducing the mixed gas into the mixed gas inlet pipe corresponding to the distillation section. During the operation, gas is taken out through the valve at intervals to detect the gas composition. When the carbon monoxide concentration reaches 90%, the valve is opened to discharge the reaction section gas and mix it with the gas in the tail gas exhaust pipe, or lead to the carbon monoxide recovery application device for further recovery and treatment. As the carbon dioxide is continuously supplied to the cooling section in the furnace through the carbon dioxide inlet pipe, when the temperature of the cooling section is lower than 100℃, the carbon material raw material discharging device is opened to discharge the blue coke. The temperature of the cooling section is observed in time during discharge, and it is stopped in time when it is greater than 100℃.

2. A method for converting carbon dioxide using a composite furnace device according to claim 1, characterized in that: A heat insulating protective layer is also arranged on the outside of the furnace body.

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