A magnetic force feeding, heating and discharging cooling tube furnace and its application

Abstract

The present invention belongs to the field of energy, and particularly relates to the thermal conversion of organic solid waste, and discloses a magnetic force traction feeding heating and discharging cooling tubular furnace. It consists of a boosting trolley, a sample trolley, a magnetic trolley and its track, a barrier pad, a connecting rod, a cooling water jacket, a furnace tube and its heating jacket, and a feeding and discharging port. The magnetic trolley is located below the furnace tube, and the trolley track is parallel to the axis of the furnace tube; the magnetic trolley magnetically traction the boosting trolley connected to the sample trolley through a connecting rod inside the furnace tube; the sample trolley is pushed by the boosting trolley into the core heating area inside the furnace tube for thermal conversion reaction; after the reaction ends, the sample trolley is moved to the cooling water jacket by the traction of the boosting trolley for cooling, and then the boosting trolley and the sample trolley can be taken out from the feeding and discharging port. The present invention has good airtightness and convenient feeding and discharging, can realize the rapid heating and cooling of organic solids, and the cooled sample has a lower temperature, avoiding the risk of reaction with external gases such as air.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy, specifically relates to the technical field of thermal conversion of organic solids, and more specifically relates to a magnetic force traction feeding heating and discharging cooling tube furnace and its application in treating biomass. Background Art

[0002] Organic solids such as crop straws, agricultural waste plastics, and waste tires are important components of bulk solid waste. Through thermochemical conversion methods, organic solid waste can be converted into gas, liquid fuels, chemicals, carbon products, etc., which is an important direction for the high-quality conversion and high-value utilization of organic solids and has become a research hotspot at home and abroad in recent years. However, the current level and ability of thermally converting organic solids into fuels and chemicals are still far lower than those of fossil energy, and it is urgent to overcome the relevant core technologies of efficient conversion and explore new technologies for the thermal conversion of organic solids.

[0003] In the field of efficient conversion technologies for organic solids, organic solids can be pyrolyzed or gasified by rapid or slow heating in a tube furnace, thereby generating gas, liquid fuels, chemicals, carbon products, etc. Some currently disclosed and authorized tube furnaces can be used for the thermal conversion of organic solids. These patents have various advantages, but there are still some deficiencies. For example:

[0004] CN202757440U discloses a movable sliding high-temperature furnace. By fixing the tube furnace tube and relying on the reciprocating movement of the heating furnace body on the tube furnace tube, the experimental sample in the tube furnace tube can quickly enter or exit the high-temperature area; it has the advantages of being simple and effectively meeting the rapid temperature rise and fall of the experimental sample during the experiment; however, there is a deficiency that it is inconvenient for the experimental sample to enter and exit the furnace tube.

[0005] CN209689383U discloses a tube furnace with a sliding member. The disclosed patent is sequentially connected with an inlet pipe, a flange, and a firebrick near one end of the furnace tube, and is sequentially connected with an outlet pipe, a flange, and a firebrick near the other end of the furnace tube. A sliding member is arranged in the furnace tube, including a first track and a second track symmetrically arranged on the inner wall of the furnace tube, and a sample rack is connected between the first track and the second track; it has the advantages that the sample rack arranged in the tube furnace can place multiple crucible boats at the same time, avoiding the spilling of samples, etc.; however, after heating the sample, it is necessary to wait for the furnace body to cool to room temperature before the sample can be taken out, which takes a long time.

[0006] CN105571319B discloses a high-temperature tubular furnace with a sliding mechanism. The disclosed patent consists of a left furnace door, a heating furnace body, a quartz furnace tube, a specimen stage, a right furnace door, and a sliding mechanism. The sliding mechanism is composed of a sliding rod, a sliding rod fixing bracket, a slide rail, a pulley, and a bracket. The left side of the sliding rod is connected to the specimen stage inside the quartz furnace tube, and the right side passes through the right furnace door and is connected to the upper end of the sliding rod fixing bracket. The sliding rod fixing bracket can slide left and right on the slide rail through the pulley at the lower end, driving the sliding rod and the specimen stage to move left and right inside the furnace tube. This patent can achieve the convenient and rapid movement of the specimen between the left furnace door and the high-temperature working area, thus facilitating feeding and discharging. However, there may be a gap and air leakage between the right furnace door and the sliding rod, and there is a possibility of introducing external ambient gas during the feeding process. Summary of the Invention

[0007] To solve the above technical problems, the technical solutions provided by the present invention are as follows:

[0008] The present invention provides a magnetic force traction feeding heating and discharging cooling tubular furnace, which includes a furnace tube, a heating jacket, a cooling water jacket composed of a cooling water inlet, a cooling water outlet, and a water jacket, and a feeding and discharging port. The furnace tube includes a carrier gas inlet and a carrier gas outlet. It is characterized in that it further includes a boosting trolley, a magnetic trolley, a magnetic trolley track, a sample trolley, and a connecting rod.

[0009] The magnetic trolley is located below the furnace tube and can move back and forth on the magnetic trolley track. The magnetic trolley track is parallel to the axis of the furnace tube. The magnetic trolley attracts the boosting trolley inside the furnace tube through magnetic force. The boosting trolley is connected to the sample trolley through a connecting rod, and the boosting trolley and the sample trolley can move back and forth inside the furnace tube.

[0010] Preferably, the sample trolley can be pushed by the boosting trolley into the core heating area inside the furnace tube for thermal conversion reaction. After the reaction ends, the sample trolley is pulled by the boosting trolley and moved into the cooling water jacket for cooling the remaining sample. After cooling, the boosting trolley and the sample trolley can be taken out from the feeding and discharging port, and the solid product of the thermal conversion of the organic solid does not react with the external air.

[0011] Specifically, the high-temperature core heating area of the furnace tube is formed by heating with resistance wires. The carrier gas inlet is arranged at the left end of the heating area of the furnace tube, and the carrier gas outlet is arranged at the right end. A heat insulation sleeve is arranged between the resistance wires in the heating area of the furnace tube and the cooling water jacket, and the heat insulation sleeve is arranged outside the furnace tube.

[0012] More preferably, the boosting trolley is made of iron-nickel material, and under the cooling effect of the cooling water jacket, the temperature of the boosting trolley will not cause the demagnetization of the magnetic trolley.

[0013] Further preferably, the wheels of the boosting trolley are made of ceramic material; preferably, the connecting rod between the boosting trolley and the sample trolley is made of ceramic material and can be in a separated or connected state with the boosting trolley and the sample trolley.

[0014] In a specific embodiment, the cooling water jacket is horseshoe-shaped, and there is a passage left at the lower part of the cooling water jacket for the magnetic trolley to pass through.

[0015] Preferably, the barrier pad is made of a heat-resistant material and is located on the connecting rod. The barrier pad is between the carrier gas outlet and the cold section when the carrier gas flows out from the carrier gas outlet. Further preferably, the barrier pad is disc-shaped and perpendicularly distributed to the connecting rod, and the diameter of the barrier pad is slightly smaller than the inner diameter of the furnace tube to play a role in guiding the thermal conversion gas to the carrier gas outlet.

[0016] Even more preferably, an anti-blowing carrier gas inlet is provided in the cooling section of the furnace body, which is located outside the cooling water jacket to start the anti-blowing carrier gas for accelerated cooling after the sample heating reaction.

[0017] The present invention thus also provides a method for treating biomass by using the magnetic force traction feeding heating and discharging cooling tubular furnace described above, which is characterized by including the following steps:

[0018] Put the organic solid biomass into the sample trolley. The boosting trolley pushes the sample trolley from the inlet and outlet to the cooling water jacket through the connecting rod. Cooling water enters from the water inlet and exits from the cooling water outlet so that the cooling water jacket can keep the sample trolley in a low-temperature state;

[0019] The carrier gas enters the furnace tube from the carrier gas inlet. After the temperature of the heating furnace tube rises to the set temperature, the magnetic trolley moves left along the magnetic trolley track, driving the boosting trolley to move left. The boosting trolley pushes the sample trolley into the high-temperature core area of the furnace tube through the connecting rod for thermal conversion reaction. The volatile substances generated during the reaction process flow out from the carrier gas outlet. Preferably, the barrier pad plays a role in guiding the carrier gas outlet;

[0020] When the set reaction time of the organic solid matter ends, the magnetic trolley moves right along the magnetic trolley track, driving the boosting trolley to move right. The boosting trolley pulls the sample trolley to the cooling water jacket through the connecting rod. Preferably, at this time, part of the carrier gas enters the furnace tube from the anti-blowing carrier gas inlet to assist in cooling the residue of the organic solid matter reaction;

[0021] After the residue of the organic solid matter reaction is cooled to a certain temperature, open the inlet and outlet to take out the sample trolley to obtain the residue of the solid matter reaction.

[0022] Compared with the existing tube furnaces, the magnetic force traction feeding heating and discharging cooling tube furnace provided by the present invention has the following advantages: (1) It is convenient for feeding and discharging; (2) It can meet the rapid heating of experimental samples; (3) It can meet the rapid cooling of experimental samples after reaction; (4) It can maintain a good atmosphere gas during the heating process of experimental samples; (5) The temperature during discharging is low, which can meet the requirement that the sample does not react with the outside gas when removed. In addition, the present invention has good airtightness, which can avoid the intake or leakage of air when the tube furnace feeds materials (when the original tube furnace opens the feeding port to discharge materials, there will be a gap of air leakage for 1-2 seconds. After the present invention discharges materials, the feeding port is sealed, and the tube furnace maintains a certain atmosphere gas and discharges the air component), and can realize the rapid acquisition of thermal conversion solid products, improving the quality of solid products in the thermal conversion process of organic solids. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram (feeding state) of the magnetic force traction feeding heating and discharging cooling tube furnace in the specific embodiment of the present invention.

[0024] Figure 2 It is a schematic diagram (discharging state) of the magnetic force traction feeding heating and discharging cooling tube furnace in the specific embodiment of the present invention.

[0025] Figure 3 It is a cross-sectional view of the cooling water jacket in the magnetic force traction feeding heating and discharging cooling tube furnace in the specific embodiment of the present invention.

[0026] The labels in the figure are: 1 resistance wire, 2 furnace tube, 3 sample trolley, 4 connecting rod, 5 barrier pad, 6 boosting trolley, 7 cooling water inlet, 8 cooling water outlet, 9 cooling water jacket, 10 backflush carrier gas inlet, 11 feeding and discharging port, 12 carrier gas inlet, 13 carrier gas outlet, 14 heat insulation sleeve, 15 magnetic trolley, 16 magnetic trolley track. SPECIFIC EMBODIMENTS

[0027] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0028] Embodiment 1

[0029] As Figure 1 and Figure 2As shown in the figure, the magnetic force feeding and discharging tubular furnace mainly includes a furnace tube 2, a sample trolley 3, a connecting rod 4, a boosting trolley 6, a cooling water jacket 9, a feeding and discharging port 11, a magnetic trolley 15, and a magnetic trolley track 16. The sample trolley 3 is connected to the boosting trolley 6 through the connecting rod 4. The magnetic trolley 15 is directly below the boosting trolley 6. The magnetic trolley 15 is located on the magnetic trolley track 16. The magnetic trolley 15 can attract the boosting trolley 6. The left and right movement of the magnetic trolley 15 on the track can drive the boosting trolley 6 to move left and right in the furnace tube 2. The boosting trolley 6 can push the sample trolley 3 to move left and right in the furnace tube 2 through the connecting rod 4. The sample trolley 3 can move from the cooling water jacket 9 to the high-temperature core area of the furnace tube 2. The high-temperature core area of the furnace tube 2 is formed by heating with a resistance wire 1. A carrier gas inlet 12 is provided at the left end of the heating area of the furnace tube 2, and a carrier gas outlet 13 is provided at the right end of the heating area of the furnace tube 2. A heat insulation sleeve 14 is provided between the resistance wire in the heating area of the furnace tube 2 and the cooling water jacket 9. The heat insulation sleeve 14 is outside the furnace tube 2.

[0030] As Figure 3 shown in the figure, the cooling water jacket 9 is in a horseshoe shape, and a cooling water inlet 7 and a cooling water outlet 8 are provided on the cooling water jacket 9. The magnetic trolley 15 and the magnetic trolley track 16 can pass through the lower channel of the cooling water jacket 9. The wheels of the boosting trolley 15 are ceramic wheels. A barrier pad 5 is provided on the connecting rod 4. The barrier pad 5 plays a role in guiding the flow of the carrier gas outlet when the sample trolley 3 is in the core heating temperature area. The backflush carrier gas inlet 10 is on the furnace tube 2, on the right side of the cooling water jacket 9. After the sample trolley moves to the cooling water jacket, the backflush carrier gas blows the sample through the backflush carrier gas inlet 10, which can accelerate the cooling of the sample.

[0031] Embodiment 2

[0032] During operation, the organic solid is placed in the sample trolley 3. The boosting trolley 6 pushes the sample trolley 3 from the loading and unloading port 11 into the cooling water jacket 9 through the connecting rod 4. By relying on the inflow of water from the cooling water inlet 7 and the outflow of water from the cooling water outlet 8, the cooling water jacket 9 can keep the sample trolley 3 in a low-temperature state. A heat insulation sleeve 14 is provided between the cooling water jacket 9 and the heating wire 1 to separate them. The carrier gas enters the furnace tube 2 from the carrier gas inlet 12. After the temperature of the furnace tube 2 is raised to the set temperature by heating with the heating wire 1, the magnetic trolley 15 moves left along the magnetic trolley track 16, driving the boosting trolley 6 to move left. The boosting trolley 6 pushes the sample trolley 3 into the high-temperature core area of the furnace tube 2 through the connecting rod 4 for thermal conversion reaction. Substances such as volatile components generated during the reaction process flow out from the carrier gas outlet 13, and the barrier pad 5 plays a role in guiding the flow of the carrier gas at the outlet. When the set reaction time of the organic solid ends, the magnetic trolley 15 moves right along the magnetic trolley track 16, driving the boosting trolley 6 to move right. The boosting trolley 6 pulls the sample trolley 3 into the cooling water jacket 9 through the connecting rod 4. At this time, part of the carrier gas enters the furnace tube 2 from the backflush carrier gas inlet 10 to assist in cooling the residue of the organic solid reaction. After the residue of the organic solid reaction is cooled to a certain temperature, the loading and unloading port 11 is opened, and the sample trolley 3 is taken out to obtain the residue of the solid reaction, thus avoiding the risk of air leakage in the tubular furnace during the cooling process of the material.

Claims

1. A magnetic force traction feeding heating and discharging cooling tube furnace, comprising a furnace tube, a heating jacket, a cooling water jacket composed of a cooling water inlet, a cooling water outlet and a water jacket, and a feeding and discharging port. The furnace tube is provided with a carrier gas inlet and a carrier gas outlet, and is characterized in that, It also includes a booster cart, a magnetic cart, a magnetic cart track, a sample cart, and a connecting rod; the magnetic cart is located below the furnace tube and can move back and forth on the magnetic cart track; the magnetic cart track is parallel to the axis of the furnace tube; the magnetic cart attracts the booster cart inside the furnace tube by magnetism, the booster cart is connected to the sample cart through the connecting rod, and the booster cart and the sample cart can move back and forth inside the furnace tube.

2. The magnetic force feeding heating and discharging cooling tube furnace according to claim 1, characterized in that The sample cart can be pushed by the booster cart to the core heating area inside the furnace tube for thermal conversion reaction; after the reaction is completed, the sample cart is moved to the cooling water jacket by the traction of the booster cart for cooling the remaining sample. After cooling, the booster cart and the sample cart can be taken out from the inlet and outlet, and the solid product of the thermal conversion of the organic solid does not react with the outside air.

3. The magnetic force feeding, heating and discharging cooling tube furnace according to claim 1, characterized in that, The high-temperature core heating area of the furnace tube is formed by heating with resistance wires; a carrier gas inlet is provided at the left end of the heating area of the furnace tube, and a carrier gas outlet is provided at the right end; a heat insulation sleeve is provided between the resistance wires of the heating area of the furnace tube and the cooling water jacket, and the heat insulation sleeve is arranged outside the furnace tube.

4. The magnetic force feeding, heating, discharging and cooling tube furnace according to claim 1, characterized in that, The booster cart is made of iron-nickel material, and under the cooling effect of the cooling water jacket, the temperature of the booster cart will not cause the demagnetization of the magnetic cart.

5. The magnetic force feeding, heating and discharging cooling tube furnace according to claim 3, characterized in that, The wheels of the booster cart are made of ceramic material; the connecting rod between the booster cart and the sample cart is made of ceramic material and can be in a separated or connected state with the booster cart and the sample cart.

6. The magnetic force feeding, heating and discharging cooling tube furnace according to claim 1, characterized in that, The cooling water jacket is horseshoe-shaped, and a channel is left at the lower part of the cooling water jacket for the magnetic cart to pass through.

7. The magnetic force feeding heating and discharging cooling tube furnace according to claim 1, characterized in that, The barrier pad is composed of a heat-resistant material and is located on the connecting rod. The barrier pad is between the carrier gas outlet and the cooling section of the furnace body when the carrier gas flows out from the carrier gas outlet.

8. The magnetic force feeding, heating and discharging cooling tube furnace according to claim 1, characterized in that The barrier pad is disc-shaped and is vertically distributed with the connecting rod. The diameter of the barrier pad is slightly smaller than the inner diameter of the furnace tube to play a role in guiding the thermal conversion gas to the carrier gas outlet.

9. The magnetic force feeding, heating and discharging cooling tube furnace according to claim 8, characterized in that, The cooling section of the furnace body is provided with a backflush carrier gas inlet, which is located outside the cooling water jacket to start backflush carrier gas for accelerated cooling after the sample heating reaction.

10. A method for treating biomass using the magnetic force traction feeding heating and discharging cooling tube furnace as described in any one of claims 1 to 9, characterized in that It includes the following steps: Put the organic solid biomass into the sample cart, and the booster cart pushes the sample cart from the inlet and outlet to the cooling water jacket through the connecting rod. Cooling water enters from the water inlet and exits from the cooling water outlet so that the cooling water jacket can keep the sample cart in a low-temperature state. The carrier gas enters the furnace tube from the carrier gas inlet. After the temperature of the furnace tube rises to the set temperature, the magnetic cart moves to the left along the magnetic cart track, driving the booster cart to move to the left. The booster cart pushes the sample cart into the high-temperature core area of the furnace tube through the connecting rod for thermal conversion reaction, and the volatile substances generated during the reaction flow out from the carrier gas outlet. When the set reaction time of the organic solid is over, the magnetic cart moves to the right along the magnetic cart track, driving the booster cart to move to the right. The booster cart pulls the sample cart to the cooling water jacket through the connecting rod. At this time, part of the carrier gas enters the furnace tube from the backflush carrier gas inlet to assist in cooling the residue of the organic solid reaction. After the residue of the organic solid reaction is cooled to a certain temperature, open the inlet and outlet, take out the sample cart, and obtain the residue of the solid reaction.

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