Flue gas collecting device of multifunctional tubular heating furnace

Abstract

The utility model discloses a multifunctional tubular heating furnace flue gas collecting device which comprises a gas mixer, the gas output end of the gas mixer is connected with a tubular furnace, a three-way valve is installed on a pipeline at the output end of the tubular furnace, and a gas absorption bottle I and a gas absorption bottle II are arranged on a pipeline behind the three-way valve; the other path is communicated with the output end of the liquid storage tank through a pipeline, and a liquid atomizing pump is mounted on the pipeline; the gas inlet end and the gas outlet end of the gas mixer are both connected in a sealed mode through flanges, and the gas inlet end is provided with three gas inlet branches which are the gas I gas inlet branch, the gas II gas inlet branch and the gas III gas inlet branch. And the tube furnace is placed in the heating sleeve. The device is used for heating raw materials and collecting and absorbing smoke, has the advantages of being large in smoke absorbing amount, simple in equipment structure, easy and convenient to operate, safe and reliable, effectively protects experimenters, and prevents the experimenters from making contact with toxic reagents for a long time.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of tubular heating furnace, specifically relates to a multifunctional tubular heating furnace flue gas collecting device. BACKGROUND

[0002] The tubular heating furnace is a kind of heat treatment equipment commonly used in chemical, chemical and material research, can provide relatively stable temperature, humidity and other operating environments for experimental raw materials, so that raw materials are heated and heat preserved under specific gas atmosphere, and are prevented from oxidation and pollution.In the tubular furnace heating experiment taking coal, pitch or carbon-based material as raw material, generally, nitrogen, air, carbon dioxide and other single gases or mixed gases are introduced into the tubular furnace to maintain the environmental changes of target experiment, so as to collect target products and obtain corresponding test rules.

[0003] The tubular heating furnace generally uses a hollow tube made of quartz or corundum as a reaction tube, the reaction tube is horizontally placed on a fixed table, and the middle part is placed in a heating jacket, the heating jacket is provided with light refractory material to achieve heat insulation and heat preservation, and the two ends of the reaction tube are located outside the heating jacket and are connected with front and rear experimental equipment respectively.The existing tubular heating furnace generally needs to be equipped with a special gas mixing device when carrying out flue gas experiment, which not only occupies a large area, but also needs to re-set circuit connection device and gas connection accessories, in addition, temporary flue gas absorption bottle and connecting pipeline also need to be equipped.Therefore, the experimental equipment is often mismatched, damaged, the pipeline is not tightly sealed, and the experimental operation is frequent.

[0004] Since the two ends of the reaction tube extend out of the heating jacket, the inner wall of the reaction tube outlet will be attached with flue gas condensate during the experiment, and the above-mentioned attachments will affect the accuracy of this experiment and the next experiment if not cleaned in time.If cleaned in time, it needs to use toxic solvents such as toluene and dichloromethane to clean manually and repeatedly, which not only consumes time and effort, but also harms the health of experimental personnel.

[0005] Patent CN214087732U discloses a water vapor activation device for activated carbon preparation, which can realize quantitative control of gas, but also has the problem of large equipment area, and cannot solve the problem of steam condensation attached to the inner wall of the tubular furnace.

[0006] Patent CN221172954U discloses a laboratory tubular furnace water vapor feeding and control device, which can realize stable and continuous gas entering the tubular furnace, and greatly avoids the condensation problem of steam in the tubular furnace, but the scheme is not suitable for flue gas collection experiment. UTILITY MODEL CONTENTS

[0007] In order to overcome the above technical problems, the utility model discloses a kind of multifunctional tubular heating furnace flue gas collection devices, which is used to heat raw material and generate and capture absorption flue gas, with the advantages of large flue gas absorption amount, simple equipment structure, easy operation, safe and reliable, effectively protect experimental personnel, avoid long time contact toxic reagent.

[0008] In order to achieve the above object, the utility model adopts the technical scheme of:

[0009] A kind of multifunctional tubular heating furnace flue gas collection device, including gas mixer 1, the gas output end of gas mixer 1 is connected with tubular furnace 3, three-way valve 5 is installed on the pipeline of the output end of tubular furnace 3, gas absorption bottle I 6, gas absorption bottle II 7 are arranged on the pipeline after three-way valve 5 one-way;Another way is communicated with the output end of liquid storage tank 9 by pipeline, and liquid atomizing pump 8 is installed on the pipeline;

[0010] The gas inlet end and the gas outlet end of the gas mixer 1 are both closed connected using flanges, and the gas inlet end is provided with three gas inlet branches, which are gas I inlet branch, gas II inlet branch and gas III inlet branch.

[0011] The tubular furnace 3 is placed in the heating jacket 2.

[0012] The heating jacket 2 is provided with a refractory lining inside, which can realize long-term heat preservation while resisting high temperature, and the refractory lining is hollow. The heating jacket 2 is provided with common hydraulic and manual locking devices in the market, which can realize quick opening and instantaneous locking of the heating jacket.

[0013] The tubular furnace 3 is connected and fixed with the heating jacket 2 by flanges at both ends.

[0014] The gas disperser 4 is installed at the internal gas inlet of the tubular furnace 3, and the gas disperser 4 is connected with the tubular furnace 3 by flanges.

[0015] The gas inlet flange outside the tubular furnace 3 is connected with the outlet pipeline of the gas mixer 1 by quick detachable pipeline, and the gas outlet flange outside is connected with the gas inlet pipeline of the three-way valve 5 by quick detachable pipeline.

[0016] The liquid inlet of the three-way valve 5 is connected with the outlet pipeline of the liquid atomizing pump 8, and the gas outlet of the three-way valve 5 is connected with the inlet pipeline of the gas absorption bottle I 6 after being connected with the pipeline.

[0017] A pressure gauge and a safety valve are arranged on the outlet pipeline of the three-way valve 5, and a bursting disc is arranged after the safety valve. When the pipeline pressure exceeds a certain value, the bursting disc breaks and releases pressure, preventing overpressure of the subsequent equipment.

[0018] The gas absorption bottle I 6 and the gas absorption bottle II 7 are both single devices, and the inlets and outlets of the gas absorption bottle I 6 and the gas absorption bottle II 7 are connected by quick detachable pipelines; the pipeline of the gas absorption bottle I 6 and the gas absorption bottle II 7 is closer to the bottom of the bottle at the gas inlet end, and the pipeline is closer to the mouth of the bottle at the gas outlet end.

[0019] The gas inlet end and the gas outlet end of the gas absorption bottle I 6 and the gas absorption bottle II 7 are integrally formed and are not connected with each other, and are respectively connected with the bottle mouth pistons of the gas absorption bottle I 6 and the gas absorption bottle II 7;

[0020] The gas absorption bottle I 6 and the gas absorption bottle II 7 contain liquid for absorbing flue gas, and the liquid is one or more combinations of water, petroleum ether, acetone, dichloromethane, cyclohexane and toluene. The gas absorption bottle I 6 and the gas absorption bottle II 7 can be connected in series or parallel, and are not limited to the gas absorption bottle I 6 and the gas absorption bottle II 7.

[0021] The liquid atomizing pump 8 can pump and atomize the liquid in the liquid storage tank 9, and is used for cleaning the inner walls of the tube furnace 3, the gas absorption bottle I 6, the gas absorption bottle II 7 and the connected pipelines.

[0022] The gas mixer 1 is a common pressurized gas mixer, which can uniformly mix multiple gases; three branch gases can be used alone or simultaneously, and each branch gas is provided with a flow meter and a flow regulating valve to realize visual and accurate control of the flow. The three branch gases entering the gas mixer 1 are not limited to three branches, and can be increased or decreased according to actual conditions. The outlet pipeline of the gas mixer 1 is provided with a flow meter, a pressure gauge and a safety valve, and a bursting disc is arranged behind the safety valve. When the pipeline pressure exceeds a certain value, the bursting disc breaks and releases pressure to prevent overpressure of the subsequent equipment.

[0023] The heating jacket 2 is provided with an integrated PLC system, and the system has no special requirements, and can realize control of different heating rates, constant temperature time and operation of the air exchange fan.

[0024] The heating jacket 2 contains a thermocouple inside, which can display the measured temperature on the display screen in real time through the PLC system. The thermocouple has no special requirements, and can meet the temperature measurement requirements of process conditions.

[0025] A heat dissipation system is arranged between the shell and the lining of the heating jacket 2. Whether the heat dissipation system is running or not can be controlled by the PLC system. When the heat dissipation system is started, the heat dissipation system is an air exchange fan, the air exchange fan is turned on and runs, the circulation of the heating jacket and the external air is accelerated, and thus the cooling speed of the tube furnace 3 is accelerated. The air exchange fan has no special requirements, and can meet the requirements of process conditions.

[0026] The utility model discloses the beneficial effect that:

[0027] (1) The gas is fully mixed and dispersed into small molecules in the gas disperser in the utility model, the effective collision probability of gas molecules and carbon-containing materials is increased, the conversion rate of carbon-containing materials is improved, and flue gas is generated to the maximum extent;

[0028] (2) The flue gas enrichment device adopts a two-stage absorption process, a first stage (for example, gas absorption bottle I) mainly absorbs heavy oil (> 350 DEG C) and small-particle dust, and a second stage (for example, gas absorption bottle II) mainly absorbs light oil (< 350 DEG C), so that components in flue gas are captured and absorbed in sections with high efficiency;

[0029] (3) The utility model adopts high-pressure and detachable sleeve connection, flange connection between pipes, mature process equipment, leakage prevention, easy operation, convenient maintenance and other advantages, avoids long-term contact with toxic reagents, and has no safety and environmental protection risks. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic view of the utility model.

[0031] Among them, 1-gas mixer;2-heating jacket;3-tube furnace;4-gas disperser;5-three-way valve;6-gas absorption bottle I;7-gas absorption bottle II;8-liquid atomizing pump;9-liquid storage tank. DETAILED DESCRIPTION

[0032] The utility model will be further described in detail in combination with the drawings.

[0033] As Figure 1 shown, the utility model discloses a multifunctional tube heating furnace flue gas collection device, including gas mixer 1, heating jacket 2, tube furnace 3, gas disperser 4, three-way valve 5, gas absorption bottle I 6, gas absorption bottle II 7, liquid atomizing pump 8, liquid storage tank 9.

[0034] The gas inlet end and the gas outlet end of the gas mixer 1 are connected by flanges, and three branch gases are arranged in the gas inlet, which are gas I, gas II and gas III respectively.

[0035] The gas I, gas II and gas III are one or more combinations of nitrogen, carbon dioxide, hydrogen, air, oxygen, carbon monoxide, methane and synthetic gas.

[0036] The heating jacket 2 is internally provided with a refractory lining, which is resistant to high temperature and can realize heat preservation effect, and the refractory lining is hollow and can place the tube furnace 3.

[0037] The pipe furnace 3 is connected by flanges at both ends, and the flanges at both ends are respectively provided with supports, and can be respectively connected and fixed with the heating jacket 2. The gas disperser 4 is embedded in the pipe furnace 3 and is connected with the pipe furnace 3 by flanges. The flange at the gas inlet of the pipe furnace 3 is connected with the outlet pipeline of the gas mixer 1 by a quick detachable pipeline, and the flange at the gas outlet is connected with the gas inlet pipeline of the three-way valve 5 by a quick detachable pipeline;

[0038] The operating temperature of the pipe furnace 3 is normal temperature to 1200℃, the heating rate is 5 to 100℃ / min, the operating pressure is normal pressure to 10MPa, the reaction type is pyrolysis, cracking, combustion, gasification and other reactions, and the reaction atmosphere is nitrogen, carbon dioxide, hydrogen, air, oxygen, carbon monoxide, methane, synthetic gas and the like;

[0039] The liquid inlet of the three-way valve 5 is connected with the outlet pipeline of the liquid atomizing pump 8, and the gas outlet is connected with the pipeline and then connected with the inlet pipeline of the gas absorption bottle I 6. The outlet pipeline of the three-way valve 5 is provided with a pressure gauge and a safety valve, and a bursting disc is arranged after the safety valve. When the pipeline pressure exceeds a certain value, the bursting disc breaks and releases pressure, preventing overpressure of the subsequent equipment;

[0040] The gas absorption bottle I 6 and the gas absorption bottle II 7 are both separate equipment, and their inlets and outlets are connected by pipelines. Moreover, the gas inlet end and the gas outlet end of the gas absorption bottle I 6 and the gas absorption bottle II 7 are different, that is, the pipeline at the gas inlet end is closer to the bottom of the bottle, and the pipeline at the gas outlet end is closer to the bottle mouth;

[0041] The operating temperature of the gas absorption bottle I 6 is 50 to 300℃, and the operating pressure is normal pressure to 10MPa;

[0042] The operating temperature of the gas absorption bottle II 7 is normal temperature to 100℃, and the operating pressure is normal pressure to 10MPa;

[0043] The inlet of the liquid atomizing pump 8 is connected with the outlet pipeline of the liquid storage tank 9, and the outlet is connected with the pipeline of the three-way valve 5. The liquid atomizing pump 8 can pump and atomize the liquid in the liquid storage tank 9, and is used for cleaning the inner wall of the pipe furnace 3, the gas absorption bottle I 6, the gas absorption bottle II 7 and the connected pipeline;

[0044] The operating pressure of the liquid atomizing pump 8 is normal pressure to 10MPa, the flow rate is 1 to 100kg / h, and the temperature is normal temperature to 100℃;

[0045] The liquid in the liquid storage tank 9 is one or more combinations of water, petroleum ether, acetone, dichloromethane, cyclohexane and toluene;

[0046] The pipelines of the liquid storage tank 9, the liquid atomizing pump 8 and the three-way valve 5 are all provided with heat tracing and heat preservation measures, and the heat tracing temperature is 20 to 100℃.

[0047] The gas mixer 1 is a common pressurized gas mixer, which can realize uniform mixing of multiple gases. The three branch gases can be used alone or simultaneously, and each branch gas is provided with a flow meter and a flow regulating valve, so that the flow can be visualized and accurately controlled. The gas mixer 1 is provided with three branch gases, which is not limited to three branches, and can be increased or decreased according to actual conditions. The gas mixer 1 is provided with a flow meter, a pressure gauge and a safety valve at the outlet pipeline, and a rupture disc is arranged after the safety valve. When the pipeline pressure exceeds a certain value, the rupture disc breaks and releases pressure, preventing overpressure of the subsequent equipment.

[0048] The heating jacket 2 is provided with an integrated PLC system, which has no special requirements for system selection and can realize control of different heating rates, constant temperature time and operation of the air exchange fan. The internal thermocouple of the heating jacket 2 can measure the temperature and display it on the display screen in real time through the PLC system. The thermocouple has no special requirements and can meet the temperature measurement requirements of the process conditions. A heat dissipation system is arranged between the shell and the lining of the heating jacket 2. Whether the heat dissipation system is running or not can be controlled by the PLC system. When the heat dissipation system is started, the heat dissipation system air exchange fan is turned on and runs, accelerating the circulation of the heating jacket and the external air, thereby accelerating the cooling speed of the tubular furnace 3. The heat exchange fan has no special requirements and can meet the requirements under the process conditions.

[0049] The tubular furnace 3 is made of transparent high-temperature and high-strength tempered glass tube. The two ends of the glass tube are respectively embedded in flanges and fixedly connected. The tubular furnace 3 uses a quartz boat or a ceramic boat to hold the raw materials that need to be heated for flue gas experiments. The gas disperser 4 can disperse the gas introduced, so that the gas is uniformly distributed and passes through the inner wall of the heating furnace 3. The three-way valve 5 is connected to the tubular furnace 3 and the gas absorption bottle I 6 in normal operation, and is connected to the tubular furnace 3 and the liquid atomizing pump 8 when flushing the tubular furnace 3;

[0050] The gas absorption bottle I 6 and the gas absorption bottle II 7 are integrally formed at the gas inlet and outlet ends and are not connected to each other, and are respectively connected to the gas absorption bottle I 6 and the gas absorption bottle II 7 through a piston type bottle mouth. The gas absorption bottle I 6 and the gas absorption bottle II 7 hold the liquid for absorbing the raw material flue gas, and the gas absorption bottle I 6 and the gas absorption bottle II 7 can be connected in series or parallel, and are not limited to the gas absorption bottle I 6 and the gas absorption bottle II 7.

[0051] The device has wide adaptability to raw materials, can process different types of carbon-containing raw materials, has high conversion efficiency and high flue gas enrichment rate, is an economical and reasonable utilization scheme for carbon-containing material conversion and flue gas enrichment, has high conversion rate, pressure operation and easy industrialization, and has good market application prospect.

[0052] Example 1

[0053] This embodiment is an example of heating asphalt and collecting asphalt fumes.

[0054] According to the following Figure 1 After connecting all the equipment, 20 g of ground asphalt particles were weighed into a quartz boat. The heating jacket 2 was opened, the heating furnace 3 outlet flange was opened, the quartz boat containing asphalt particles was placed in the middle position of the heating furnace 3, and then the flange connection was restored, the heating jacket 2 was closed and locked.

[0055] The gas path I (nitrogen) pressure was adjusted to 0.1 MPa, and the front and rear safety valve burst discs of the heating furnace 3 had an explosion pressure of 0.2 MPa. The three-way valve 5 was set to connect the heating furnace 3 and the gas absorption bottle I 6. 100 ml of toluene and dichloromethane were pre-loaded into the gas absorption bottle I 6 and the gas absorption bottle II 7, respectively. The gas path I flow regulating valve was opened, and the nitrogen flow was set to 200 ml / min. The nitrogen was vented through the gas mixer 1, the tubular furnace 3, the gas disperser 4, the three-way valve 5, and the gas absorption bottle I 6 and the gas absorption bottle II 7 were temporarily isolated from the system. The three-way valve 5 and the gas absorption bottle II 7 venting pipeline were connected using a pipeline.

[0056] The heating jacket 2 program was set as follows:

[0057] (1) From room temperature 20℃ to 100℃, time 8 minutes;

[0058] (2) 100℃ constant temperature 1 hour (dry sample asphalt);

[0059] (3) 100℃ to 200℃, time 20 minutes;

[0060] (4) 200℃ constant temperature 2 hours, stop heating, start cooling system, system cooling;

[0061] (5) When the temperature of the heating jacket 2 drops below 30℃, the program ends.

[0062] When the heating jacket 2 program runs for 50 minutes, the pipeline from the three-way valve 5 to the gas absorption bottle II 7 venting pipeline is removed, the three-way valve 5 is connected to the gas absorption bottle I 6 inlet, and the gas absorption bottle II 7 is connected to the venting pipeline.

[0063] When the heating jacket 2 program ends, the gas mixer 1 front hand valve is closed, the heating jacket 2 is opened, the heating furnace 3 rear flange is opened, the quartz boat and residual asphalt sample are taken out, and the heating furnace 3 rear flange is restored. The three-way valve 5 is set to connect the liquid atomizing pump 8 and the heating furnace 3.

[0064] The liquid atomizing pump 8 is started to atomize the 50 ml of toluene in the liquid storage tank 9 and send it into the heating furnace 3 and flush the inner wall of the heating furnace 3. When the toluene in the liquid storage tank 9 is consumed (or after the set flushing time of 2 minutes is over), the liquid atomizing pump 8 is turned off, the three-way valve 5 is set to connect the heating furnace 3 and the gas absorption bottle I 6, and the front hand valve of the gas mixer 1 is opened to send nitrogen into the heating furnace 3 to flush the toluene solution in the heating furnace 3. After the flushing is completed, the front hand valve of the gas mixer 1 is closed.

[0065] The liquid storage tank 9 is filled with 50 ml of dichloromethane, and then the above flushing and flushing operations are repeated. The flushing and flushing operations can be repeated many times, and the amount of reagent filled in the liquid storage tank 9 and the set flushing time can be increased or decreased according to the actual situation.

[0066] After the above operations are completed, the gas absorption bottle I 6 and the gas absorption bottle II 7 are detached from the device and sent to the analysis room for subsequent experimental steps such as rotary evaporation and constant volume.

[0067] The liquid storage tank 9 is filled with alcohol, the three-way valve 5 is connected to the temporary solution bottle, and the above flushing and flushing operations are repeated. The liquid atomizing pump 8 is flushed (if the experiment is the same as before, the liquid atomizing pump 8 can not be flushed).

Claims

1. A multifunctional tubular heating furnace flue gas collection device, characterized in that, It includes a gas mixer (1), the gas output end of the gas mixer (1) is connected to a tubular furnace (3), a three-way valve (5) is installed on the pipeline at the output end of the tubular furnace (3), a gas absorption bottle I (6) and a gas absorption bottle II (7) are installed on one pipeline after the three-way valve (5); the other pipeline is connected to the output end of the liquid storage tank (9), and a liquid atomizing pump (8) is installed on the pipeline. The gas mixer (1) has a flange-sealed connection at both the inlet and outlet ends. The inlet end is provided with three inlet branches, namely the gas I inlet branch, the gas II inlet branch, and the gas III inlet branch. The tubular furnace (3) is placed in the heating jacket (2).

2. The multifunctional tubular heating furnace flue gas collection device according to claim 1, characterized in that, The heating jacket (2) is provided with a refractory lining inside, and the refractory lining is hollow.

3. The multifunctional tubular heating furnace flue gas collection device according to claim 1, characterized in that, The tubular furnace (3) is connected by flanges at both ends, and the flanges at both ends are provided with supports, which are respectively connected and fixed to the heating jacket (2).

4. The multifunctional tubular heating furnace flue gas collection device according to claim 1, characterized in that, A gas disperser (4) is installed at the internal air inlet of the tubular furnace (3), and the gas disperser (4) is connected to the tubular furnace (3) via a flange.

5. The multifunctional tubular heating furnace flue gas collection device according to claim 1, characterized in that, The outer gas inlet flange of the tubular furnace (3) is connected to the outlet pipeline of the gas mixer (1) via a quick-detachable pipeline, and the outer gas outlet flange is connected to the gas inlet pipeline of the three-way valve (5) via a quick-detachable pipeline.

6. The multifunctional tubular heating furnace flue gas collection device according to claim 1, characterized in that, The liquid inlet of the three-way valve (5) is connected to the outlet pipeline of the liquid atomizing pump (8), and the gas outlet of the three-way valve (5) is connected to the pipeline and then connected to the inlet pipeline of the gas absorption bottle I (6). The outlet pipe of the three-way valve (5) is equipped with a pressure gauge and a safety valve, and a rupture disc is installed after the safety valve.

7. The multifunctional tubular heating furnace flue gas collection device according to claim 1, characterized in that, The gas absorption bottle I (6) and the gas absorption bottle II (7) are both separate devices. The inlet and outlet of the gas absorption bottle I (6) and the gas absorption bottle II (7) are connected by quick-disassembly pipes. The pipes at the inlet end of the gas absorption bottle I (6) and the gas absorption bottle II (7) are closer to the bottom of the bottle, and the pipes at the outlet end are closer to the mouth of the bottle.

8. The multifunctional tubular heating furnace flue gas collection device according to claim 7, characterized in that, The inlet and outlet ends of the gas absorption bottle I (6) and the gas absorption bottle II (7) are integrally formed and not connected to each other. They are respectively connected to the bottle mouths of the gas absorption bottle I (6) and the gas absorption bottle II (7) in a piston-like manner. The gas absorption bottle I (6) and the gas absorption bottle II (7) contain liquid for absorbing flue gas. Multiple sets of the gas absorption bottle I (6) and the gas absorption bottle II (7) can be connected in series or in parallel. The liquid atomizing pump (8) is used to pump and atomize the liquid in the storage tank (9) for cleaning the inner walls of the tubular furnace (3), gas absorption bottle I (6), gas absorption bottle II (7) and the connected pipelines.

9. A multifunctional tubular heating furnace flue gas collection device according to claim 1, characterized in that, The gas mixer (1) is a common pressurized gas mixer, which realizes the uniform mixing of multiple gases; the gas mixer (1) has three gas inlet branches, but the gas is not limited to three branches; the gas mixer (1) has a flow meter, a pressure gauge, and a safety valve in the outlet pipeline, and a rupture disc is installed after the safety valve.

10. A multifunctional tubular heating furnace flue gas collection device according to claim 1, characterized in that, The heating jacket (2) is equipped with an integrated PLC system. The heating jacket (2) contains thermocouples that can display the measured temperature on the display screen in real time through the PLC system. A heat dissipation system is provided between the outer shell and the inner lining of the heating jacket (2).

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