Carbon electric heating roasting equipment free of harmful gas and zero in carbon emission

Abstract

The invention belongs to the field of carbon, and provides harmful gas-free and zero-carbon-emission carbon electric heating roasting equipment which comprises metal material heating bodies, a carbon raw product is placed between the metal material heating bodies, metal materials are electrified to heat the metal materials, roasting of the carbon raw product is achieved, and the carbon raw product is obtained. The raw carbon product is a carbon forming blank containing adhesives such as asphalt, negative electrode powder containing volatile component gas and a carbon material needing dry distillation and carbonization, a metal material is electrified to heat after a filler is added between the metal material heating body and the raw carbon product, and the filler and the raw carbon product are heated to 600-1200 DEG C through conduction; according to the invention, the carbon product and the filler are uniformly heated by the metal material heating body through clean electric power, and volatile gas discharged during heating is not diluted by combustion waste gas, so that the treatment difficulty is simple, and the volatile gas can be recycled.

Description

Technical Field

[0001] The invention belongs to the field of carbon products, in particular to a carbon electric roasting equipment with no harmful gas and zero carbon emission. Background Art

[0003] Roasting, one of the four major processes in the production of carbon products, forming, roasting, graphitization and machining, currently has the following mainstream equipment technologies: covered ring roasting furnace, open roasting furnace, car bottom roasting furnace and tunnel kiln. Although their structures are different, they all use fuel gas combustion as the heat source. Not only is the CO2 emission large, but the carbon products also emit volatile gases accounting for 7-9% of their mass during the roasting process. The components include asphalt smoke, benzopyrene, particulate matter, nitrogen oxides and SO2, which are discharged together with the combustion exhaust gas, making environmental protection management more difficult. After the exhaust gas meets the standards, it still needs to be discharged into the air through the chimney. Using green electricity to develop new roasting equipment is a call for new quality productivity.

[0004] The dry distillation, carbonization process and waste gas treatment of other carbon raw products are basically similar to the above-mentioned roasting process.

[0005] To this end, the inventors have proposed a carbon electric roasting equipment with no harmful gases and zero carbon emissions to solve the problems raised by the background technology. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a carbon electric roasting equipment with no harmful gas and zero carbon emission to solve the problems existing in the prior art.

[0007] The invention discloses an electric heating roasting equipment for carbon with no harmful gas and zero carbon emission, which comprises a process of passing electric current through a metal material heating element to make it heat up, thereby realizing a roasting process for a carbon raw product placed therein.

[0008] Preferably, a filler is added between the metal material heating element and the carbon raw product, and the metal material is heated by electricity, and the filler and the carbon product are heated by conduction to reach 600-1200°C.

[0009] Preferably, the carbon raw product is a carbon forming blank containing a binder, a negative electrode powder containing a volatile gas, and a carbonaceous material that needs to be dry-distilled and carbonized.

[0010] Preferably, the shape of the metal material heating element can be changed according to the needs of the carbon product to be heated.

[0011] Preferably, a tubular cracking cooling device is fixed on the metal material heating element.

[0012] Preferably, power can be supplied to a single metal material heating element; power can also be supplied to a plurality of metal material heating elements connected end to end to form a series circuit; and the series circuits can also be arranged in parallel according to production capacity requirements.

[0013] Preferably, the roasting equipment also includes a cracking cooling device, a gas collecting and dispersing channel, a cooling, dust removal and dehydration device, a gas boiler, an internal combustion engine, an industrial furnace and other gas-using devices.

[0014] Preferably, there is no chimney required for exhausting the combustion exhaust gas and volatile gases generated by heating the carbonization chamber with the combustion gas.

[0015] Preferably, the roasting equipment includes a power supply device consisting of a complete transformer, a flexible power supply, a rectifier cabinet, a busbar, a soft connection, etc.

[0016] Preferably, the volatile gases generated during the roasting process are burned through a gas-using device to emit CO2, and ultra-low emissions are achieved after passing through a denitrification device. The emissions can also be catalytically hydrogenated to produce methanol, formic acid, ethanol, acetic acid and other compounds to achieve zero carbon emissions.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention uses electric current to evenly heat the carbon products and fillers through the metal heating element. The volatile gases discharged during the process are not diluted by the combustion exhaust gas, so the treatment difficulty is not only simple but also can be recycled.

[0019] 2. After the volatile gas discharged from roasting is cracked and cooled, there is no asphalt smoke, benzopyrene, tar, particulate matter and other harmful solid, liquid and gas substances.

[0020] 3. There is no combustion exhaust gas emission, and the improved thermal efficiency and reduced energy consumption are contributions to the dual carbon strategy.

[0021] 4. The main components of the gas discharged after cracking are carbon monoxide, methane, hydrogen, etc., which are burned in gas-using equipment to produce relatively pure carbon dioxide, and then catalytically hydrogenated to produce methanol, ethanol, formic acid, acetic acid and other compounds, achieving zero carbon emissions from the carbon roasting furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 , Figure 2 This is a structural diagram of Embodiment 1 of the present invention;

[0023] Figure 3 , Figure 4 This is a structural diagram of Embodiment 2 of the present invention;

[0024] In the figure:

[0025] 1. Rectifier transformer, rectifier cabinet; 2. Positive busbar; 3. Negative busbar; 4. Metal heating element; 5. Filling material; 6. Carbon products; 7. Cracking cooling device; 8. Gas collecting hood; 9. Gas collecting and dispersing channel; 10. Flue gas pipeline; 11. Cooling, dust removal and dehydration device; 12. Centrifugal fan; 13. Gas using device; DETAILED DESCRIPTION

[0026] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to describe the present invention, but are not intended to limit the scope of the present invention.

[0027] Embodiment 1: As shown in the attached Figure 1 As shown: The present invention provides a carbon electric roasting equipment with no harmful gas and zero carbon emission, including a metal material heating body 4, a carbon raw product 6 is placed between the metal material heating body 4, the metal material is energized to make it heat up, and the carbon raw product 6 is roasted, the carbon raw product 6 is a carbon forming blank containing an adhesive such as asphalt, a negative electrode powder containing volatile gas, and a carbonaceous material that needs to be distilled and carbonized, and a filler 5 that needs to be added is added between the metal material heating body 4 and the carbon raw product 6. The negative electrode material and the like that are not needed are then energized to make the metal material heat up, and the filler 5 and the carbon product 6 are heated by conduction to 600-1200°C, and the metal A tubular cracking and cooling device 7 is fixed on the metal material heating element 4. 58 metal material heating elements 5 are connected end to end to form a series circuit connected to a power supply device for power supply. The power supply device can be fixed or movable. In this case, it is a fixed type. When the cracking and cooling device 7 is at a high temperature, it receives volatile gas produced by another group of furnaces and is sent into its bottom through a gas collecting and dispersing channel 9. In the process of gas rising, it is cracked at high temperature to generate small molecular combustible gas with a narrow range. It is discharged through a flue gas pipe 10 under the sealing of a gas collecting hood 8, and is purified by a cooling, dust removing and dehydrating device 11 before entering a gas using device 13. The CO2 discharged after combustion in the gas using device 13 is passed through a denitrification device to achieve ultra-low emissions.

[0028] Embodiment 2: As shown in the attached Figure 2As shown: The present invention provides a carbon electric heating roasting equipment with no harmful gas and zero carbon emission, including a metal material heating element 4, the metal material heating element 4 is cylindrical and a carbon raw product 6 is placed inside, the metal material is energized to make it heat up, and the carbon raw product 6 is roasted, the carbon raw product 6 is a carbon forming blank containing an adhesive such as asphalt, a negative electrode powder containing volatile gas, and a carbonaceous material that needs to be distilled and carbonized, a filler 5 that needs to be added is added between the cylindrical metal material heating element 4 and the carbon raw product 6, and the metal material is energized to make it heat up, and the filler 5 and the carbon product 6 are heated by conduction to 600-1200°C, and the cylindrical metal material heating element 4 The shape can be changed according to the needs of the heated carbon product 6. The cylindrical metal material heating element 4 is preferably arranged in an equilateral triangle. 38 cylinders are connected from top to bottom and from bottom to bottom to form a series circuit and are connected to the power supply device. The power supply device can be fixed or movable. In this case, it is fixed. The outer triangular area of ​​the equilateral triangle arrangement is a cracking and cooling device 7. When it is at a high temperature, it receives the volatile gas produced by another group of furnaces and is sent into its bottom by the gas collecting and dispersing channel 9. In the process of gas rising, it is cracked at high temperature to generate small molecular combustible gas with a narrow range, which is discharged from the flue gas pipe 10 and purified by the cooling, dust removal and dehydration device 11 before entering the gas using device 13. The CO2 discharged after combustion in the gas using device 13 is passed through the denitrification device to achieve ultra-low emissions.

[0029] The power supply unit is powered by a rectifier transformer and a rectifier cabinet 1, and supplies power to the series circuit composed of the metal material heating element 4 through the positive bus 2 and the negative bus 3. When the current passes through the metal material heating element 4, Q=I 2 The Rt law generates resistance heat, and a group of series circuits are formed by the metal material heating element 4, the purpose of which is to increase the load voltage, reduce the current, and make the load circuit more reasonable. According to the production capacity, multiple groups of power supply units can be successively incorporated, and the production capacity load is more balanced through the reasonable combination of series and parallel.

[0030] The carbon product 4 and the filler 5 are placed in the cylindrical metal heating element 4. When the power supply unit supplies power, the current flows through, and the metal heating element 4 will heat up. The heating lasts for 300-800 hours, and the temperature rises to 600-1200°C according to the different uses of the product. When the power is turned off, the gas collecting hood 8 is opened and the temperature is lowered to below 300°C by the chimney effect of the cracking cooling device 7 before being taken out.

[0031] In the volatile gas utilization unit, the volatile gas discharged during the roasting process of the product is collected by the gas collecting hood 8, and enters the gas collecting and dispersing channel 9 of the high-temperature furnace that has been powered off through the branch of the flue gas pipe 10, and then is sent to the bottom of the furnace. During the rising process of the gas, the small molecular combustible gas with a narrow range is cracked and discharged through the high temperature, and then collected by the gas collecting hood 8 of the high-temperature furnace that has been powered off, and enters the cooling, dust removal and dehydration device through the flue gas pipe 10 for cooling and purification, and then the purified gas enters the gas using device 13 through the centrifugal fan 12, so as to achieve ultra-low emissions. In addition, because the gas in the gas collecting hood 8 is a flammable gas, a pipeline venting and purge valve and a pipeline switching valve are required on the pipeline to ensure the safety of operation and maintenance.

[0032] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention without affecting the claims of the present invention.

[0033] In the drawings of the embodiments disclosed in the present invention, only the structures involved in the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0034] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A carbon electric roasting equipment with no harmful gas and zero carbon emission, Features: Electric current passes through the metal material heating element (4) to heat it, thereby achieving a roasting process for the carbon raw product (6) placed therein.

2. According to claim 1, a carbon electric roasting equipment with no harmful gas and zero carbon emission, Features: A filler (5) is added between the metal material heating element (4) and the carbon raw product (6), and the metal material is energized to generate heat, and the filler (5) and the carbon product (6) are heated by conduction to a temperature of 600-1200°C.

3. According to claim 1, a carbon electric roasting equipment with no harmful gas and zero carbon emission, Features: The carbon raw product (6) is a carbon forming blank containing a binder, a negative electrode powder containing a volatile gas, and a carbonaceous material that needs to be dry-distilled and carbonized.

4. According to claim 1, a carbon electric roasting equipment with no harmful gas and zero carbon emission, Features: The shape of the metal material heating element (4) can be changed according to the needs of the carbon product (6) to be heated.

5. According to claim 4, a carbon electric roasting equipment with no harmful gas and zero carbon emission, Features: A tubular cracking cooling device (7) is fixed on the metal material heating element (4).

6. According to claim 5, a carbon electric roasting equipment with no harmful gas and zero carbon emission, Features: Power can be supplied to a single metal material heating element (4); power can also be supplied to a plurality of metal material heating elements (4) connected end to end to form a series circuit; and the series circuits can also be arranged in parallel according to production capacity requirements.

7. According to claim 1, a carbon electric roasting equipment with no harmful gas and zero carbon emission, Features: The roasting equipment also includes a cracking cooling device (7), a gas collecting and dispersing channel (9), a cooling, dust removal and dehydration device (11), and gas-using devices (13) such as gas boilers, internal combustion engines, and industrial furnaces.

8. According to claim 1, a carbon electric roasting equipment with no harmful gas and zero carbon emission, Features: There is no chimney required for discharging the combustion exhaust gas and volatile gas generated by heating the carbonization chamber with the combustion gas.

9. According to claim 1, a carbon electric roasting equipment with no harmful gas and zero carbon emission, Features: The roasting equipment includes a power supply device consisting of a complete transformer, a flexible power supply, a rectifier cabinet, a busbar, a soft connection, etc.

10. According to claim 7, a carbon electric roasting equipment with no harmful gas and zero carbon emission, Features: The volatile gas generated during the roasting process is burned by the gas-using device (13) and then discharged as CO 2 Ultra-low emissions can be achieved after passing through the denitrification device, and the emissions can also be catalytically hydrogenated to produce methanol, formic acid, ethanol, acetic acid and other compounds to achieve zero carbon emissions.

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