Low-temperature carbonization furnace with waste gas collection function

Abstract

The utility model discloses a low-temperature carbonization furnace with waste gas collection, and particularly relates to the technical field of low-temperature carbonization furnace equipment, which comprises a furnace body, a bottom plate arranged below an inner cavity of the furnace body, a temperature sensor mounted at the top of the inner cavity of the furnace body, heating pipes mounted on two sides of the temperature sensor, and two waste discharge ports arranged on one side of the inner cavity of the furnace body, one side of each waste discharge port is fixedly communicated with a waste discharge assembly, the waste discharge assembly comprises a connecting pipe arranged on one side of the furnace body, one side of the connecting pipe is fixedly communicated with a collecting pipe, one side of the collecting pipe is provided with an air pump, one side of the air pump is fixedly communicated with a waste gas inlet, and one side of the waste gas inlet is fixedly communicated with a waste gas and combustion improver mixing chamber. According to the low-temperature carbonization furnace, waste gas generated in the furnace body can be discharged after being treated, and the retention time of the waste gas in the low-temperature carbonization furnace is shortened, so that the pre-oxidation performance of carbon fibers is improved, the waste gas treatment process in the carbonization process is perfected, and the waste gas treatment effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of low-temperature carbonization furnace equipment, and more specifically, to a low-temperature carbonization furnace with waste gas collection. Background Art

[0002] Carbon fiber is a new fiber material with high strength and high modulus, containing more than 95% carbon. It has excellent properties such as light weight, high strength, good thermal stability, and dimensional stability, and has been widely used in various fields of military and

[0003] civil industries. The low-temperature carbonization furnace is an important piece of equipment on the carbon fiber production line, usually using a metal muffle. During use, the metal muffle will have significant thermal expansion and contraction. During low-temperature carbonization, a large amount of tar and waste gas will be discharged from the fiber material. If the tar and waste gas cannot be efficiently discharged from the furnace body, it will lead to a poor working environment for the metal muffle, thus seriously polluting the fiber and resulting in low-quality carbon fiber.

[0004] After retrieval, a Chinese patent with the authorization announcement number CN209550272U discloses a low-temperature carbonization furnace. When the main discharge port is blocked during the production process, this structure switches to the standby waste discharge port, and at the same time cleans the blocked main waste discharge port. After the cleaning is completed, it switches back to the main waste discharge port, ensuring that the metal muffle always maintains a high level of working effect, thereby improving the waste discharge efficiency of the waste discharge device and ensuring smooth waste discharge at the discharge port.

[0005] However, when this structure is actually used, the harmful gas in the low-temperature carbonization furnace is discharged from the waste discharge port, and this gas still remains in the furnace body, and the treatment effect of the discharged gas is not sufficient, thereby reducing the quality of carbon fiber and having an impact on the environment. In view of this, the present utility model proposes a low-temperature carbonization furnace with waste gas collection. Summary of the Utility Model

[0006] In order to overcome the above-mentioned defects of the prior art, the present utility model provides a low-temperature carbonization furnace with waste gas collection to solve the problems raised in the above background art.

[0007] To achieve the above object, the present utility model provides the following technical solutions: a low-temperature carbonization furnace with waste gas collection, including a furnace body. A bottom plate is provided at the bottom of the inner cavity of the furnace body. A temperature sensor is installed at the top of the inner cavity of the furnace body. Heating tubes are installed on both sides of the temperature sensor. Two waste discharge ports are opened on one side of the inner cavity of the furnace body. A waste discharge assembly is fixedly communicated with one side of the two waste discharge ports. The waste discharge assembly includes a connecting pipe provided on one side of the furnace body. A confluence pipe is fixedly communicated with one side of the connecting pipe. An air pump is installed on one side of the confluence pipe. An exhaust gas inlet is fixedly communicated with one side of the air pump. An exhaust gas and combustion-supporting agent mixing chamber is fixedly communicated with one side of the exhaust gas inlet. A combustion-supporting gas interface pipe is provided at the top of the exhaust gas inlet. A combustion chamber is provided at the top of the exhaust gas and combustion-supporting agent mixing chamber. A gas dischargeable chamber is provided on one side of the combustion chamber. A discharge port is provided at the top of the gas dischargeable chamber.

[0008] It can be seen that in the above structure, the raw materials are put into the furnace body. The temperature of the heating tubes is controlled by the controller. The air pump sucks the gas in the furnace body into the exhaust gas and combustion-supporting agent mixing chamber, then enters the combustion chamber, and finally is discharged through the discharge port at the top of the gas dischargeable chamber, achieving the purpose of collecting and treating the exhaust gas.

[0009] In order to be able to put the raw materials into the furnace body and adjust the temperature in the furnace body, preferably, a door plate is provided on one side of the furnace body. The door plate is connected to one side of the furnace body through a hinge. A temperature display is fixedly provided on one side of the door plate. An auxiliary rod is provided on one side of the temperature display. Both the auxiliary rod and the temperature display are fixedly connected to one side of the door plate.

[0010] In order to control the temperature of the combustion-supporting gas added so that it can burn fully after entering the combustion chamber, preferably, a heater is provided at the bottom of the combustion-supporting gas interface pipe. One side of the combustion-supporting gas interface pipe is communicated with the exhaust gas and combustion-supporting agent mixing chamber.

[0011] In order to ensure the safety and efficiency during gas treatment, preferably, a heat-resistant metal material layer, a refractory heat storage body, and a heat insulation layer are provided in sequence from the outside to the inside of the exhaust gas and combustion-supporting agent mixing chamber, the combustion chamber, and the gas dischargeable chamber.

[0012] In order to control the gas flow rate and achieve a stable gas combustion effect, preferably, a throttle port one is provided at the connection between the combustion chamber and the exhaust gas and combustion-supporting agent mixing chamber, and a throttle port two is provided at the connection between the combustion chamber and the gas dischargeable chamber.

[0013] In order to achieve an efficient gas treatment effect, preferably, a cleaning port is provided on one side of the exhaust gas and combustion-supporting agent mixing chamber, a combustion gas inlet is provided on one side of the combustion chamber, an ignition device is provided above the combustion gas inlet, and a supplementary air inlet is provided on one side of the gas dischargeable chamber.

[0014] To support the equipment and increase the stability during operation, preferably, a number of support blocks are provided at the bottom of the furnace body and at the bottom of the waste gas and combustion-supporting agent mixing chamber.

[0015] Technical effects and advantages of the present utility model:

[0016] 1. By providing a waste gas discharging assembly, the air pump sucks the gas in the furnace body into the waste gas and combustion-supporting agent mixing chamber, so as to reduce the residence time of the waste gas generated during the low-temperature carbonization process in the low-temperature carbonization furnace, improve the pre-oxidation performance of carbon fiber, and by providing a waste gas and combustion-supporting agent mixing chamber, a combustion chamber and a gas dischargeable chamber, the waste gas treatment process during the carbonization process is improved, the blockage of the pipeline at the carbonization furnace end can be reduced and the waste gas pipeline can be kept unobstructed, and the waste gas treatment effect is improved;

[0017] 2. By adding high-purity oxygen to the combustion-supporting gas interface pipe, the combustible waste gas can be effectively combusted, the waste gas treatment pressure at the rear end can be reduced, the gas flow is controlled by the first throttle port and the second throttle port, a stable waste gas combustion effect is achieved, and by providing a heat-resistant metal material layer, a refractory heat storage body and a heat insulation layer, the gas treatment process is made safer and more efficient, which is beneficial to environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0019] Figure 2 It is a front view of the present utility model.

[0020] Figure 3 It is a side view of the present utility model.

[0021] Figure 4 It is a rear view of the present utility model.

[0022] Figure 5 It is a top view of the present utility model

[0023] Figure 6 It is a sectional view of the furnace body structure of the present utility model

[0024] Figure 7 It is a sectional view of the waste gas discharging assembly of the present utility model.

[0025] The reference numerals are: 1, furnace body; 2, bottom plate; 3, temperature sensor; 4, heating pipe; 5, waste discharge port; 6, connecting pipe; 7, manifold; 8, air pump; 9, waste gas inlet; 10, waste gas and combustion-supporting agent mixing chamber; 11, combustion-supporting gas interface pipe; 12, combustion chamber; 13, dischargeable gas chamber; 14, discharge port; 15, door panel; 16, temperature display; 17, auxiliary rod; 18, heater; 19, heat-resistant metal material layer; 20, refractory heat storage body; 21, heat insulation layer; 22, throttle port one; 23, throttle port two; 24, cleaning port; 25, combustion gas inlet; 26, ignition device; 27, air supply port; 28, support block. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] As shown in the attached Figure 1-7 The low-temperature carbonization furnace with waste gas collection shown in the figure includes a furnace body 1. A bottom plate 2 is arranged at the bottom of the inner cavity of the furnace body 1. A temperature sensor 3 is installed at the top of the inner cavity of the furnace body 1. Heating pipes 4 are installed on both sides of the temperature sensor 3. Two waste discharge ports 5 are opened on one side of the inner cavity of the furnace body 1. A waste discharge assembly is fixedly communicated with one side of the two waste discharge ports 5. The waste discharge assembly includes a connecting pipe 6 arranged on one side of the furnace body 1. A manifold 7 is fixedly communicated with one side of the connecting pipe 6. An air pump 8 is installed on one side of the manifold 7. A waste gas inlet 9 is fixedly communicated with one side of the air pump 8. A waste gas and combustion-supporting agent mixing chamber 10 is fixedly communicated with one side of the waste gas inlet 9. A combustion-supporting gas interface pipe 11 is arranged at the top of the waste gas inlet 9. A combustion chamber 12 is arranged at the top of the waste gas and combustion-supporting agent mixing chamber 10. A dischargeable gas chamber 13 is arranged on one side of the combustion chamber 12. A discharge port 14 is arranged at the top of the dischargeable gas chamber 13.

[0028] Specifically, in this structure, when the furnace body 1 is working, the air pump 8 sucks the generated gas from the waste discharge port 5 and discharges it into the waste gas and combustion-supporting agent mixing chamber 10, then burns through the combustion chamber 12, and finally enters the dischargeable gas chamber 13. Finally, the waste gas is discharged through the discharge port 14 at the top of the dischargeable gas chamber 13, so as to achieve the collection and treatment of waste gas.

[0029] In a specific embodiment, as shown in the attached Figure 1 、 2As shown, a door panel 15 is provided on one side of the furnace body 1. The door panel 15 is connected to one side of the furnace body 1 through a hinge. A temperature display 16 is fixedly provided on one side of the door panel 15, and an auxiliary rod 17 is provided on one side of the temperature display 16. Both the auxiliary rod 17 and the temperature display 16 are fixedly connected to one side of the door panel 15.

[0030] Specifically, in this structure, the raw materials are put into the furnace body 1 by opening the door panel 15. The temperature display 16 enables the staff to see the temperature situation inside the furnace body 1, so as to adjust the temperature and ensure the working quality.

[0031] In a specific embodiment, as shown in the appendix Figure 3 As shown, a heater 18 is provided at the bottom of the combustion-supporting gas interface pipe 11, and one side of the combustion-supporting gas interface pipe 11 is connected to the waste gas and combustion-supporting agent mixing chamber 10.

[0032] Specifically, in this structure, the combustion-supporting gas enters the combustion-supporting gas interface pipe 11. At this time, the heater 18 controls the temperature of the combustion-supporting gas, so as to achieve the effect of full combustion during combustion.

[0033] In a specific embodiment, as shown in the appendix Figure 7 As shown, the waste gas and combustion-supporting agent mixing chamber 10, the combustion chamber 12, and the dischargeable gas chamber 13 are successively provided with a heat-resistant metal material layer 19, a refractory heat storage body 20, and a heat insulation layer 21 from the outside to the inside.

[0034] Specifically, in this structure, by successively arranging the heat-resistant metal material layer 19, the refractory heat storage body 20, and the heat insulation layer 21 from the outside to the inside in the chamber body, the safety and efficiency during gas treatment are ensured.

[0035] In a specific embodiment, as shown in the appendix Figure 7 As shown, a throttle port one 22 is provided at the connection between the combustion chamber 12 and the waste gas and combustion-supporting agent mixing chamber 10, and a throttle port two 23 is provided at the connection between the combustion chamber 12 and the dischargeable gas chamber 13.

[0036] Specifically, in this structure, the gas passes through the throttle port one 22 and the throttle port two 23 in sequence. During this process, the gas flow is controlled to achieve a stable waste gas treatment effect.

[0037] In a specific embodiment, as shown in the appendix Figure 3 、 7 As shown, a cleaning port 24 is provided on one side of the waste gas and combustion-supporting agent mixing chamber 10, a combustion gas inlet 25 is provided on one side of the combustion chamber 12, an ignition device 26 is provided above the combustion gas inlet 25, and a makeup air port 27 is provided on one side of the dischargeable gas chamber 13.

[0038] Specifically, in this structure, the cleaning port 24 is used to clean the exhaust gas and combustion-supporting agent mixing chamber 10. The combustion gas inlet 25 is used to introduce combustion gas and burn it by turning on the ignition device 26. The air supply port 27 adjusts the indoor pressure and discharges the gas after combustion.

[0039] In a specific embodiment, as shown in the appendix Figure 1 、 3 several supporting blocks 28 are provided at the bottom of the furnace body 1 and the bottom of the exhaust gas and combustion-supporting agent mixing chamber 10.

[0040] Specifically, in this structure, the supporting blocks 28 support the furnace body 1 and the waste discharge assembly to increase the stability during operation.

[0041] Working principle of the present utility model:

[0042] When the above structure is specifically used, the staff first opens the door panel 15, then places the carbon fiber inside the furnace body 1 and closes the door panel 15. When the furnace body 1 is working, the temperature detected by the temperature sensor 3 can be digitally displayed through the controller. At this time, the heating tube 4 is temperature-controlled by the controller. At the same time, the air pump 8 sucks the gas generated inside the furnace body 1 through the waste discharge port 5 into the connecting pipe 6, and then enters the manifold pipe 7, and enters the exhaust gas inlet 9 through the air pump 8. Among them, when the air pump 8 is closed, the inside of the furnace body 1 can be sealed to prevent the exhaust gas from overflowing during low-temperature carbonization. When the air pump 8 is turned on, the exhaust gas inside the furnace body 1 can be discharged through the waste discharge port 5;

[0043] When the gas enters the exhaust gas and combustion-supporting agent mixing chamber 10 through the exhaust gas inlet 9, the combustion-supporting gas is added from the combustion-supporting gas interface pipe 11 at this time, and the combustion-supporting gas is heated by the heater 18 so that the gas can burn sufficiently in the combustion chamber 12. The combustion-supporting gas enters the exhaust gas and combustion-supporting agent mixing chamber 10 after being heated by the heater 18. The gas in the exhaust gas and combustion-supporting agent mixing chamber 10 is mixed and then passes through the first throttle port 22. At this time, the first throttle port 22 controls the gas flow. When the gas enters the combustion chamber 12, the combustion gas is added from the combustion gas inlet 25 at this time, and then the ignition device 26 is turned on for combustion. The gas after combustion passes through the second throttle port 23 into the gas dischargeable chamber 13, and then the indoor pressure is adjusted through the air supply port 27. Finally, the gas is discharged from the discharge port 14. This process is safe and environmentally friendly.

[0044] When the work is completed, the door panel 15 is opened, and the carbonized fiber inside the furnace body 1 is taken out to complete the low-temperature carbonization of the carbon fiber and the collection and treatment of the exhaust gas.

[0045] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. Low-temperature carbonization furnace with waste gas collection, comprising a furnace body (1), characterized in that: At the bottom of the inner cavity of the furnace body (1), there is a bottom plate (2). At the top of the inner cavity of the furnace body (1), a temperature sensor (3) is installed. On both sides of the temperature sensor (3), heating tubes (4) are installed. On one side of the inner cavity of the furnace body (1), two waste discharge ports (5) are provided. On one side of the two waste discharge ports (5), a waste discharge assembly is fixedly communicated. The waste discharge assembly includes a connecting pipe (6) arranged on one side of the furnace body (1). On one side of the connecting pipe (6), a confluence pipe (7) is fixedly communicated. On one side of the confluence pipe (7), an air pump (8) is installed. On one side of the air pump (8), an exhaust gas inlet (9) is fixedly communicated. On one side of the exhaust gas inlet (9), an exhaust gas and combustion-supporting agent mixing chamber (10) is fixedly communicated. On the top of the exhaust gas inlet (9), there is a combustion-supporting gas interface pipe (11). On the top of the exhaust gas and combustion-supporting agent mixing chamber (10), a combustion chamber (12) is arranged. On one side of the combustion chamber (12), there is a gas dischargeable chamber (13). On the top of the gas dischargeable chamber (13), there is a discharge port (14).

2. The low-temperature carbonization furnace with waste gas collection according to claim 1, wherein: On one side of the furnace body (1), there is a door panel (15). The door panel (15) is connected to one side of the furnace body (1) through a hinge. On one side of the door panel (15), a temperature display (16) is fixedly provided. On one side of the temperature display (16), there is an auxiliary rod (17). Both the auxiliary rod (17) and the temperature display (16) are fixedly connected to one side of the door panel (15).

3. The low-temperature carbonization furnace with waste gas collection according to claim 1, characterized in that: At the bottom of the combustion-supporting gas interface pipe (11), there is a heater (18). One side of the combustion-supporting gas interface pipe (11) is communicated with the exhaust gas and combustion-supporting agent mixing chamber (10).

4. The low-temperature carbonization furnace with waste gas collection according to claim 1, characterized in that: The exhaust gas and combustion-supporting agent mixing chamber (10), the combustion chamber (12), and the gas dischargeable chamber (13) are sequentially provided with a heat-resistant metal material layer (19), a refractory heat storage body (20), and a heat insulation layer (21) from the outside to the inside.

5. The low-temperature carbonization furnace with waste gas collection according to claim 1, characterized in that: At the connection between the combustion chamber (12) and the exhaust gas and combustion-supporting agent mixing chamber (10), there is a throttle orifice one (22). At the connection between the combustion chamber (12) and the gas dischargeable chamber (13), there is a throttle orifice two (23).

6. The low-temperature carbonization furnace with waste gas collection according to claim 1, characterized in that: On one side of the exhaust gas and combustion-supporting agent mixing chamber (10), there is a cleaning port (24). On one side of the combustion chamber (12), there is a combustion gas inlet (25). Above the combustion gas inlet (25), there is an ignition device (26). On one side of the gas dischargeable chamber (13), there is a air supply port (27).

7. The low-temperature carbonization furnace with waste gas collection according to claim 1, characterized in that: On the bottom of the furnace body (1) and the bottom of the exhaust gas and combustion-supporting agent mixing chamber (10), a number of support blocks (28) are provided.

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