CN113046104A - Pyrolysis device and pyrolysis method for red mud catalytic biomass infrared pyrolysis - Google Patents
Pyrolysis device and pyrolysis method for red mud catalytic biomass infrared pyrolysis Download PDFInfo
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- CN113046104A CN113046104A CN202110296831.8A CN202110296831A CN113046104A CN 113046104 A CN113046104 A CN 113046104A CN 202110296831 A CN202110296831 A CN 202110296831A CN 113046104 A CN113046104 A CN 113046104A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B23/00—Other methods of heating coke ovens
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/02—Dust removal
- C10K1/026—Dust removal by centrifugal forces
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/04—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials
- C10K1/046—Reducing the tar content
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
Abstract
The utility model provides a pyrolysis device and pyrolysis method of red mud catalysis living beings infrared pyrolysis, component element includes gas supply system, pyrolysis reaction system, result detection and recovery system, gas cylinder, gas mass flow meter, mist preheater and the steam generator of gas supply system pass through the air duct and connect, are infrared heating device's tubular infrared heating element around pyrolysis reactor of pyrolysis reaction system, and foraminiferous quartz plate is installed at the center, and the result detects and the recovery system carries out on-line analysis gas composition. The device and the pyrolysis method based on the device can realize fast temperature rise in the biomass and pyrolysis processes, the biomass and the red mud are subjected to harmless treatment through the device, and high-quality tar and pyrolysis gas are obtained under the action of catalytic pyrolysis.
Description
Technical Field
The invention relates to the technical field of waste resource utilization, in particular to a pyrolysis device and a pyrolysis method for red mud catalytic biomass infrared pyrolysis.
Background
The red mud is industrial solid waste discharged when the aluminum industry extracts aluminum oxide, the red mud amount is larger and larger along with the development of the aluminum industry and the reduction of the bauxite grade, the red mud is alkaline substance, the alkali in the red mud can be dissolved out along with the showering of rainwater, the surface water and the underground water can be polluted, and the biomass in China has development potential equivalent to the utilization prospect of the red mud.
The biomass comprises agricultural product processing residues, forestry wood residues, animal wastes and the like, and the yield of the biomass is huge in the global range every year and can reach the billion tons. The biomass resource reserves in China can reach 4.6 hundred million tons compared with standard coal. At present, a biomass treatment method mainly comprises incineration or non-treatment, and the incineration of biomass is great waste of hydrocarbon energy in biomass and can cause serious pollution to the atmospheric environment. The main stream processing method of the red mud comprises damming and wet stacking, wherein partial alkali liquor is recycled by natural sedimentation separation, the red mud is dried and dehydrated and then stacked, and partial enterprises adopt dry stacking, so that the stacking amount is reduced, the stacking height can be increased, the processing cost is increased, the land still needs to be occupied, the rainwater in the south is sufficient, the land alkalization and water pollution are easily caused, and the like.
Pyrolysis is a good method for obtaining energy from waste energetic materials, more tar and pyrolysis gas can be obtained by pyrolyzing coal, biomass and the like, and red mud contains Al2O3、Fe2O3For the metal oxides, researchers have obtained higher tar yield by pyrolyzing biomass and pure metal oxide catalysts respectively, but research and development on biomass and red mud co-pyrolysis devices are few.
Disclosure of Invention
In order to solve the defects of the existing biomass and red mud treatment, the invention provides a pyrolysis device and a pyrolysis method for red mud catalytic biomass infrared pyrolysis, which can realize fast temperature rise and high yield in the biomass and pyrolysis process.
In order to achieve the purpose, the technical scheme of the invention is as follows: the utility model provides a pyrolysis device of infrared pyrolysis of red mud catalysis living beings, component element includes gas supply system, pyrolytic reaction system, result detection and recovery system, and the concrete structure and the relation of connection of component element are:
gas supply system's gas cylinder, gaseous mass flow meter, mist preheater and steam generator, the gas cylinder is connected with gaseous mass flow meter, and gaseous mass flow meter passes through the air duct and is connected with mist preheater inlet pipe, and steam generator is connected with gaseous mass flow meter, and gaseous mass flow meter is same with mist preheater inlet pipe connection, and mist preheater's outlet pipe connection is to the air inlet of heater. The red mud and the biomass can be subjected to pyrolysis reaction under different pyrolysis atmospheres through the gas supply system, and the optimal atmosphere condition of pyrolysis can be known by observing different pyrolysis atmospheres.
The pyrolysis reaction system comprises a heater, a reactor, a support column, a plug, a reaction plate, a thermocouple, quartz wool, a single chip microcomputer, a pressure gauge and a thermometer, wherein the plug of the reactor is welded with a mixed gas preheater, the quartz wool is filled in the hole of the reactor top end and the heater, the reactor is coated in the center of the reactor by a tubular infrared heating element, the thermocouple is arranged on the outer wall of the reactor, the upper part of the heater is supported by the support column, the single chip microcomputer, the pressure gauge, the temperature and display gauge are embedded in the lower part of the heater, the pressure gauge is welded with the reactor, the temperature display gauge is connected with the thermocouple, and the reaction plate;
the product detection and recovery system comprises a heat-preservation heating belt, a cyclone separator, a semicoke recovery tank, a condenser, an oil separator, an ice water bath pool, an acetone washing bottle, an air outlet valve, a wet-type flowmeter, a gas collection bin and a gas chromatography analyzer, wherein the semicoke recovery tank is positioned at the left lower part of the pyrolysis reaction system, the semicoke recovery tank is welded with the reactor through a stainless steel pipe, the heat-preservation heater is wound outside the stainless steel pipe, the cyclone separator, the oil separator, the acetone washing bottle and the wet-type flowmeter are connected with the gas chromatography analyzer in sequence through a silica gel pipe, the oil separator is positioned in the condenser, the acetone washing bottle is arranged in the ice water bath pool, and the gas collection bin is connected with the gas chromatography analyzer to perform on-line gas component analysis.
The reactor is 80mm in diameter, 350mm in length and 5mm in thickness and is made of quartz.
The reactor is provided with a reaction plate with holes 50mm away from the bottom, the diameter of each hole is 5mm, the density of the holes is 5ppi, and the material is quartz.
The pyrolysis method of the pyrolysis device suitable for the infrared pyrolysis of the red mud catalytic biomass comprises the following steps:
1) fully mixing the red mud and the biomass in proportion, taking down a plug at the top of the reactor, and allowing the red mud and the biomass to enter the reactor for starting pyrolysis;
2) connecting all systems and all pipelines of the device, opening the gas cylinder, closing the plug, adjusting the gas mass flow meter to control the flow rate, and checking the gas tightness, wherein the gas in the gas cylinder firstly enters the reactor to completely remove the air in the reactor, and after the gas flow rate is adjusted, the soap water is used for checking the tightness of the device to ensure the air tightness of the device and then carrying out the next operation;
3) opening the mixed gas preheater and the steam generator and respectively adjusting the temperature, and starting the reaction after the temperature is increased to the target temperature and is adjusted;
4) after the pyrolysis reaction is finished, a pyrolysis gas product at the bottom in the reactor is firstly separated from semicoke contained in the cyclone separator, the separated semicoke is collected by a semicoke recovery tank, the gas product subjected to cyclone separation is condensed by a condenser, tar components in the gas product are cooled and condensed, the obtained tar enters an oil separator for collection, the gas product is collected by an acetone washing bottle immersed in an ice water bath tank, the tar which is not condensed by the condenser is collected in a gas collection bin after passing through a wet flowmeter, and the gas collection bin is connected with a gas chromatograph analyzer for on-line analysis of gas components.
The quality of a product obtained by singly pyrolyzing biomass is not ideal, in order to obtain a high-quality pyrolysis product, catalytic co-pyrolysis is an excellent means, red mud and biomass are loaded into a reactor body, pyrolysis reaction is started after air in the reactor body is removed, the biomass is uniformly and quickly heated and starts to generate pyrolysis reaction under the action of a tubular infrared heating element in the high-temperature reactor body, and macromolecular organic matters are decomposed into micromolecular alkane, olefin, aromatic hydrocarbon and the like under the catalytic action of metal oxide;
the gas flow is 200 ml/min-300 ml/min.
The temperature of the infrared heater is 500-900 ℃, the heating rate is 10-100 ℃/s, the temperature of the mixed gas preheater is 200-300 ℃, and the temperature of the steam generator is 120-150 ℃.
The temperature of the mixed gas preheater was 300 ℃.
The mixing ratio of the biomass to the red mud is 2: 1-1: 2, the biomass is crushed into particles with the particle size of 0.2-0.45mm, and the red mud is ground to be below 200 meshes.
The invention has the beneficial effects that:
1. the red mud can perform catalytic pyrolysis on biomass, can obtain high-quality tar, can achieve the aim of treating waste by waste, and treats the waste while treating the biomass. Realizes the harmless treatment of the biomass and obtains high-quality tar and pyrolysis gas.
2. The device can realize the quick and uniform heating of the biomass, reduce pyrolysis by-products and be beneficial to the production of tar.
3. The catalytic pyrolysis of the red mud to the biomass is realized without adding a catalyst.
4. Can overcome the defects that the traditional catalyst is expensive and can not be recycled, and has good common pyrolysis effect.
5. The product recovery efficiency is high, the gas product is firstly subjected to cyclone separator to remove impurities such as semicoke and the like, tar is efficiently recovered through a condenser and acetone washing bottle, and finally the components of the gas product can be analyzed on line.
Drawings
Fig. 1 is a schematic structural diagram of a red mud catalytic biomass infrared pyrolysis device provided by the invention.
Fig. 2 is a schematic structural diagram of a tubular infrared element, a heater and a thermocouple of the red mud catalytic biomass infrared pyrolysis device.
Fig. 3 is a schematic structural diagram of a reaction plate of the red mud catalytic biomass infrared pyrolysis device.
Labeled as: the device comprises a gas cylinder 1, a gas mass flow meter 2, a steam generator 3, a mixed gas preheater 4, a heater 5, a plug 6, quartz wool 7, a reactor 8, a thermocouple 9, a tubular infrared heating element 10, a reaction plate 11, a heat preservation heating band 12, a support column 13, a semicoke recovery tank 14, a stm32 single-chip microcomputer 15, a cyclone separator 16, a pressure gauge 17, a thermometer 18, a condenser 19, an oil separator 20, an acetone washing bottle 21, an air outlet valve 22, an ice water bath 23, a wet type flow meter 24, a gas collection bin 25 and a gas phase chromatographic analyzer 26.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and examples.
It should be noted that, unless otherwise explicitly stated or limited, the terms "connected" and "connected" in the description of the present invention are to be construed broadly, and may be, for example, fixedly, detachably, or integrally, mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Example 1
As shown in fig. 1 to 3, the red mud catalytic biomass infrared pyrolysis device provided by the invention comprises a gas supply system, a pyrolysis reaction system, and a product detection and recovery system. The concrete structure and the connection relation of the components are as follows:
the gas supply system comprises a gas cylinder 1, a gas mass flow meter 2, a steam generator 3 and a mixed gas preheater 4, wherein the gas cylinder 1, the gas mass flow meter 2, the steam generator 3 and the mixed gas preheater 4 are connected through stainless steel gas guide pipes with the diameters of 3-5 mm, the gas cylinder 1 is connected with the gas mass flow meter 2, the gas mass flow meter 2 is connected with an inlet pipeline of the gas preheater 4 through a gas guide pipe, the steam generator 3 is connected with a second gas mass flow meter 2-1, the other end of the second gas mass flow meter 2-1 is connected with an inlet pipeline of the mixed gas preheater 4, an outlet pipeline of the mixed gas preheater 4 is connected to a gas inlet of a heater 5, and;
the pyrolysis reaction system comprises a heater 5, a reactor 8, a tubular infrared heating element 10, a reaction plate 11, a support column 13, a plug 6, a thermocouple 9, quartz wool 7, a single chip microcomputer 15, a pressure gauge 17 and a thermometer 18, wherein the plug 6 is connected with a mixed gas preheater 4 through an air passage, the quartz wool is filled in a pore of the reactor 8 and the heater 5, the reactor 8 is coated in the center of the reactor 8 by the tubular infrared heating element 10, the thermocouple 9 is arranged on the outer wall of the reactor 8, the upper part of the heater 5 is supported by the support column, the single chip microcomputer 15, the pressure gauge 17 and the thermometer 18 are embedded in the lower part of the heater, the pressure gauge 17 is welded with the reactor 8, the thermometer 18 is connected with the thermocouple 9, and the reaction plate 11 is integrally connected;
the product detection and recovery system comprises a heat-preservation heating belt 12, a cyclone separator 16, a semicoke recovery tank 14, a condenser 19, an oil separator 20, an ice-water bath tank 23, an acetone washing bottle 21, an air outlet valve 22, a wet-type flowmeter 24, a gas collection bin 25 and a gas chromatography analyzer 26, wherein the semicoke recovery tank 14 is positioned at the left lower part of the pyrolysis reaction system, the semicoke recovery tank 14 is welded with the reactor 8 through a stainless steel pipe, the heat-preservation heating belt 12 is wound outside the stainless steel pipe, the cyclone separator 16, the oil separator 20, the acetone washing bottle 21 and the wet-type flowmeter 24 are sequentially connected through a silica gel pipe, the oil separator 20 is positioned in the condenser 19, the acetone washing bottle 21 is positioned in the ice-water bath tank 23, and the gas collection bin 25 is connected with the gas chromatography analyzer 36 to analyze gas components on line.
The width of the heater 5 is 500mm, the length is 600mm, the thickness is 350mm, and the appearance material is stainless steel. A hole with the diameter of 100mm is arranged in the middle of the upper side surface of the support for placing the reactor 8, an air hole with the diameter of 100mm is also arranged in the middle of the lower side surface of the support for connecting an air outlet pipeline, a hole with the diameter of 60mm is arranged in the middle of the rear side surface of the support for welding a bearing, and the bearing is welded with the support 13. An air hole with the diameter of 5mm is arranged above the inner side surface of the opening of the heater 9 and is used for being welded with the pressure gauge 17, the reactor 8 is coated at the center of the reactor by the heater 5, and quartz wool with the thickness of 5mm is arranged between the tubular infrared heating element 10 and the outer wall of the reactor 8.
The diameter of the reactor 8 is 80mm, the length is 350mm, the thickness is 5mm, and the material is quartz. The reactor 8 is provided with a reaction plate 11 with holes 50mm away from the bottom, the diameter of the holes is 5mm, the density of the holes is 5ppi, the holes are uniformly distributed, and the material is quartz.
Example 2
An example of a pyrolysis method suitable for the red mud-catalyzed biomass infrared pyrolysis device is that the pyrolysis device is connected according to the connection method described in example 1, 100g of dried biomass is added to the reaction plate 11 of the reactor 8, the gas entering the gas cylinder 1 is preferably nitrogen, i.e. the biomass is pyrolyzed in nitrogen atmosphere, the gas flow is 200ml/min, the gas tightness of the device is firstly checked, the gas outlet valve 22 is opened, the temperature of the mixed gas preheater 4 is adjusted to 300 ℃, the temperature of the steam generator 3 is adjusted to 120 ℃, the temperature of the heater 5 is 600 ℃, when all the adjusted temperatures are increased to the adjusted temperatures, the biomass starts pyrolysis reaction in the reactor 8, and the obtained product contains about 24.33% of coke, about 40.82% of tar product and about 28.75% of gas product.
Example 3
Another example of the pyrolysis method of the pyrolysis device suitable for the infrared pyrolysis of the red mud-catalyzed biomass is that the pyrolysis device is connected according to the connection method described in example 1, the gas in the gas cylinder is preferably nitrogen, i.e. the pyrolysis is performed under the nitrogen atmosphere, the flow of the nitrogen is 200ml/min, the gas tightness of the device is firstly checked, the gas outlet valve 22 is opened, the temperature of the mixed gas preheater 4 is adjusted to 300 ℃, the temperature of the steam generator 3 is adjusted to 120 ℃, when all the adjusted temperatures are increased to the adjusted temperatures, the biomass is crushed to 0.2-0.45mm, the red mud is ground to 200 meshes or less, 200g of the dried red mud and the biomass are added to the reaction plate 11 of the reactor 8, the heater 5 is opened for pyrolysis, and the temperature of the heater 5 is 600 ℃; the ratio of biomass to red mud is 1: 1, the coke content in the obtained product is about 25.23%, the tar content is about 45.93%, and the gas content is about 24.84%.
The working principle and the process are as follows:
a red mud catalytic biomass infrared pyrolysis device and a pyrolysis method are provided, wherein a plug 6 is taken down, charging is carried out after a charging proportion is set, a gas cylinder is opened after charging is finished, a gas outlet valve 22 is opened and a gas mass flowmeter 2 is adjusted to control flow, gas firstly enters a reactor 8 to remove air completely, a steam generator 3 and a mixed gas preheater 4 are opened and temperature is respectively adjusted, after temperature adjustment is finished, after the temperature rises to the target temperature, the biomass starts pyrolysis reaction in the reactor 8, the biomass is quickly heated under the action of the tubular infrared heating element, the biomass is uniformly and quickly heated and starts pyrolysis reaction, macromolecular organic matters accelerate the reaction and are heated and decomposed into micromolecular alkane, olefin, aromatic hydrocarbon and the like under the catalytic action of transition metal oxides in the red mud, and pyrolysis volatile matters and inert gases enter a recovery and detection system through the small holes of the reaction plate 11; the pyrolysis gas product is firstly separated from the semicoke contained in the cyclone separator 16, the separated semicoke is collected by a semicoke recovery tank 14, the gas product separated by cyclone is condensed by a condenser 19, tar components in the gas product are condensed by cooling, the obtained tar enters an oil separator 20 for collection, the gas product is collected by an acetone washing bottle 21 soaked in an ice water bath 23 and is not condensed by the condenser, finally, the gas is collected in a gas collection bin 25 after passing through a wet flowmeter 24, and the gas collection bin 25 is connected with a gas chromatographic analyzer 26 for on-line analysis of gas components.
In particular, the gas cylinder 1, the gas mass flow meter 2, the steam generator 3, the mixed gas preheater 4, the stm32 single chip microcomputer 15, the cyclone separator 16, the pressure gauge 17, the thermometer 18, the condenser 19, the wet flow meter 24, the discharge valve 22 and the gas chromatograph 26 are all general standard components or components known to those skilled in the art, and these components or instruments can be found by inquiring relevant manual or standard. According to the red mud catalytic biomass pyrolysis device and the pyrolysis method, provided by the invention, the temperature can be rapidly increased, the biomass is subjected to in-situ catalytic pyrolysis to obtain a high-quality pyrolysis product, and energy is recovered while the red mud and the biomass are subjected to harmless treatment.
In particular, the semicoke recovery tank 14, the oil separator 20 and the gas collecting bin 25 are made of stainless steel, and the sizes of the stainless steel, the oil separator and the gas collecting bin can be optimized according to the feeding amount of the reagent.
Claims (8)
1. The utility model provides a pyrolysis device of infrared pyrolysis of red mud catalysis living beings, component element includes gas supply system, pyrolytic reaction system, result detection and recovery system, its characterized in that, the concrete structure and the relation of connection of component element are:
the gas cylinder is connected with the gas mass flow meter, the gas mass flow meter is connected with an inlet pipeline of the mixed gas preheater through a gas guide pipe, the steam generator is connected with the other gas mass flow meter and then connected with the inlet pipeline of the mixed gas preheater, an outlet pipeline of the mixed gas preheater is connected to a gas inlet of the heater, and the heating device is connected with an inlet of the plug;
the pyrolysis reaction system comprises a heater, a reactor, a support column, a plug, a reaction plate, a thermocouple, quartz wool, a single chip microcomputer, a pressure gauge and a thermometer, wherein the plug of the reactor is welded with a mixed gas preheater, the quartz wool is filled in a hole of the reactor top end and the heater, the reactor is coated in the center of the reactor by a tubular infrared heating element, the thermocouple is arranged on the outer wall of the reactor, the upper part of the heater is supported by the support column, the single chip microcomputer, the pressure gauge, the temperature and display gauge are embedded in the lower part of the heater, the pressure gauge is welded with the reactor, the temperature display gauge is connected with the thermocouple;
the product detects and recovery system includes heat preservation heating band, cyclone, semicoke accumulator, condenser, oil separator, ice water bath, acetone wash bottle, air outlet valve, wet-type flowmeter, gas collection storehouse and gas chromatography appearance, semicoke accumulator is located pyrolytic reaction system's left side below, and semicoke accumulator passes through stainless steel pipe and reactor welding, and the outside winding insulated heater of stainless steel pipe, cyclone, oil separator, acetone wash bottle, wet-type flowmeter, gas collection storehouse and gas chromatography appearance loop through the silicone tube and connect, and oil separator is located the condenser, and the acetone wash bottle is arranged in ice water bath, and the gas collection storehouse is connected with gas chromatography appearance and is carried out on-line analysis gas composition.
2. The pyrolysis device for the infrared pyrolysis of the red mud catalytic biomass according to claim 1, characterized in that: the reactor is 80mm in diameter, 350mm in length and 5mm in thickness and is made of quartz.
3. The pyrolysis device for the infrared pyrolysis of the red mud catalytic biomass according to claim 1, characterized in that: the reactor is provided with a reaction plate with holes 50mm away from the bottom, the diameter of each hole is 5mm, the density of the holes is 5ppi, and the reaction plate is made of quartz.
4. The pyrolysis method of the red mud catalytic biomass infrared pyrolysis device is characterized by comprising the following steps:
1) taking down a plug at the top of the reactor, loading and fully mixing the biomass and the red mud, and then adding the mixture, wherein the red mud and the biomass enter the reactor to wait for pyrolysis;
2) connecting a pipeline, opening a gas cylinder, closing a plug, adjusting the gas flow, checking the gas tightness, opening a mixed gas preheater, and allowing the gas in the gas cylinder to enter a reactor to completely remove the air in the reactor;
3) opening a steam generator and a mixed gas preheater and respectively adjusting the temperature, adjusting pyrolysis parameters through a single chip microcomputer when the temperature rises to a target temperature, and starting a pyrolysis reaction;
4) after the pyrolysis reaction is finished, the pyrolysis product at the bottom in the reactor enters a discharge recovery tank, the pyrolysis gas product is firstly subjected to heat preservation in a pipeline and then is separated from semicoke contained in the cyclone separator and is collected by the semicoke recovery tank, the gas product is condensed by a condenser and then is collected by an oil separator to obtain tar, the gas product is subjected to acetone bottle washing in an ice water bath, finally, the gas which is not condensed is collected in a gas collection bin after passing through a wet flowmeter, and the gas collection bin is connected with a gas chromatograph to analyze gas components on line.
5. A pyrolysis process according to claim 4 wherein the gas flow is from 200 to 300 ml/min.
6. A pyrolysis method according to claim 4, wherein the temperature of the heater is 500 to 800 ℃, the temperature rise rate is 10 to 100 ℃/s, the temperature of the mixed gas preheater is 200 to 300 ℃, and the temperature of the steam generator is 120 to 150 ℃.
7. A pyrolysis process according to claim 4 wherein the temperature of the mixed gas preheater is 300 ℃.
8. A pyrolysis method according to claim 4, wherein the mixing ratio of the biomass to the red mud is 2: 1-1: 2, drying the red mud at 65 ℃ for 12 hours and grinding the dried red mud to 200 meshes.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113462410A (en) * | 2021-07-30 | 2021-10-01 | 重庆大学 | Infrared rapid heating medical waste's pyrolysis polygeneration system |
| CN113462421A (en) * | 2021-07-30 | 2021-10-01 | 重庆大学 | Pyrolysis method for heating medical waste or waste plastic by molten salt |
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