Organic waste gas pipe containing viscous substances

Abstract

The utility model relates to an organic waste gas pipe containing viscous substances. The organic waste gas pipe comprises a waste gas pipe body, a heat tracing jacketed pipe, an expansion joint, an external sealing box and a jacketed end plate. The waste gas pipe is of a cylindrical tubular structure, is located in the center of the interior of the heat tracing jacketed pipe and is used for organic waste gas containing viscous waste materials such as tar to pass through. The heat tracing jacketed pipe is of a cylindrical tubular structure and is used for allowing hot air required by jacketed hot air heat tracing to pass through, so that the waste gas pipe is kept at the working temperature. The expansion joint is of a spring-shaped structure, is located in the middle of the heat tracing jacketed pipe and is used for absorbing stretching compression generated by inconsistent expansion amount of the waste gas pipe and the heat tracing jacketed pipe. And the external sealing box is connected with the jacket end plate. By changing the heat tracing design mode, the problems that a heat tracing system is unstable, high in cost, difficult to construct and the like are solved, and meanwhile by adding an expansion joint structure, the heat tracing maximum allowable temperature is increased.

Description

Technical Field

[0001] This application relates to the field of organic waste gas treatment, and more particularly to an organic waste gas pipe containing viscous substances. Background Technology

[0002] The types of carbon fibers produced on a large industrial scale include polyacrylonitrile (PAN)-based carbon fiber, pitch-based carbon fiber, and viscose-based carbon fiber. Among them, polyacrylonitrile-based carbon fiber has developed rapidly due to its simpler production process and better overall performance. It holds an absolute advantage in carbon fiber production, with the widest range of applications, the largest consumption, and the fastest development. my country's carbon fiber production is mainly based on polyacrylonitrile-based carbon fiber.

[0003] The mechanism of carbonized tar formation is as follows: Due to various reasons, the ladder-like bilayer molecular chain structure of pre-oxidized fibers cannot achieve the ideal requirements, with an aromatization index of only about 50%, and some single-chain units still remaining, resulting in insufficient thermal stability. At high temperatures, the single-chain and single-bond portions of the polymer chains naturally become weak points, easily leading to molecular chain breakage and the formation of small molecular fragments. These small molecular fragments are mostly unsaturated substances, which are prone to further condensation and aggregation in the high-temperature environment of the carbonization furnace, forming carbonized tar.

[0004] When the exhaust gas from carbon fiber is piped to the exhaust gas treatment equipment, tar in the exhaust gas adheres to the pipes, clogging them and affecting the exhaust. Tar has a high viscosity and is difficult to remove from the clogged pipes.

[0005] The existing pipeline design for tar-containing organic waste gas uses stainless steel pipes with electric heat tracing. To maintain the fluidity of the tar and prevent pipe blockage, the electric heat tracing needs to be stably maintained above 550℃. At high temperatures, the heat tracing wire has a short lifespan, is prone to burnout, the heat tracing system is unstable, costly, and difficult to construct. Utility Model Content

[0006] In view of this, this application proposes a pipe for organic waste gas containing viscous substances, the structure of which includes a waste gas pipe, a heat tracing jacket pipe, and an expansion joint; and a jacket end plate. The waste gas pipe is a cylindrical tubular structure located at the internal center of the heat tracing jacket pipe, used for the passage of organic waste gas containing viscous waste. The heat tracing jacket pipe has a cylindrical tubular structure, is sleeved on the outside of the waste gas pipe, and heats the waste gas pipe to maintain its working temperature; and there are two or more heat tracing jacket pipes. The expansion joint is a telescopic structure, and the two or more heat tracing jacket pipes are connected by the expansion joint.

[0007] Preferably, the exhaust pipe is provided with flange structures at both ends. The flanges have an airtight structure and are suitable for connecting to an exhaust gas input device or an exhaust gas treatment device.

[0008] Preferably, the heat tracing jacket includes a heat tracing gas port, which serves as either a heat tracing gas inlet or outlet according to the connection sequence of the organic waste gas pipe containing viscous substances.

[0009] Preferably, the organic waste gas pipe containing viscous substances includes an external sealing box. The external sealing box is located on the outside of the connection between the two waste gas pipes, and the heat tracing jacket pipe is sealed to both sides of the external sealing box.

[0010] Preferably, the outer sealing box includes jacketed end plates at both ends, with airflow distribution holes inside the jacketed end plates and flange threaded connection holes on the outside of the jacketed end plates, and the outside of the jacketed end plates is connected to the sealing box.

[0011] Preferably, the heat tracing jacket includes at least three airflow distributors with a baffle structure.

[0012] Preferably, a temperature control device is provided on the heat tracing jacket. The temperature control device measures the internal temperature of the heat tracing jacket. When the internal temperature is lower than the condensation temperature of the viscous organic matter inside, the temperature control device will control the heat generating device to generate heat and input it into the heat tracing jacket through the heat tracing gas port.

[0013] Preferably, the jacket end plate has airflow distribution holes inside.

[0014] Preferably, the outer sealed box is opened by sliding.

[0015] Preferably, the airflow distributor includes uniformly distributed circular air holes.

[0016] The beneficial effects of this utility model are:

[0017] By changing the heat tracing design, the problems of instability, high cost, and difficult construction of the heat tracing system were solved. At the same time, by adding an expansion joint structure, the maximum allowable temperature of the heat tracing was increased.

[0018] Other features and aspects of this application will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are included in and form part of this specification, illustrate exemplary embodiments, features, and aspects of this application together with the specification and serve to explain the principles of this application.

[0020] Figure 1 This diagram shows the main structure of the organic waste gas pipe device containing viscous substances according to an embodiment of this application;

[0021] Figure 2 This diagram shows the connection between the viscous organic waste gas pipe device and external equipment according to an embodiment of this application;

[0022] Figure 3This diagram illustrates the structural method of opening the external sealing box of the organic waste gas pipe containing viscous substances according to an embodiment of this application.

[0023] Figure 4 This diagram illustrates the principle of heat insulation using a flange structure for the jacket end plate in an embodiment of this application. Detailed Implementation

[0024] Various exemplary embodiments, features, and aspects of this application will now be described in detail with reference to the accompanying drawings. The same reference numerals in the drawings denote elements that have the same or similar functions. Although various aspects of the embodiments are shown in the drawings, they are not necessarily drawn to scale unless specifically indicated otherwise.

[0025] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model or simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] The term “exemplary” as used herein means “serving as an example, embodiment, or illustration.” Any embodiment illustrated herein as “exemplary” is not necessarily to be construed as superior to or better than other embodiments.

[0028] Furthermore, to better illustrate this application, numerous specific details are provided in the following detailed description. Those skilled in the art should understand that this application can be implemented without certain specific details. In some instances, methods, means, components, and circuits well-known to those skilled in the art have not been described in detail in order to highlight the main points of this application.

[0029] This utility model relates to a pipe for transporting organic waste gas containing viscous substances, applied in the field of waste gas transmission containing viscous organic substances, serving to transport the waste gas containing organic substances to subsequent waste gas treatment equipment. Its structure includes a waste gas pipe, a heat-tracing jacket pipe, and an expansion joint; a jacket end plate. The waste gas pipe is a cylindrical tubular structure located at the center of the heat-tracing jacket pipe, used for the passage of organic waste gas containing viscous waste. The heat-tracing jacket pipe has a cylindrical tubular structure, sleeved on the outside of the waste gas pipe, heating the waste gas pipe to maintain its operating temperature; and there are two or more heat-tracing jacket pipes. The expansion joint is a telescopic structure, connecting two or more heat-tracing jacket pipes.

[0030] In one possible embodiment, flange structures are provided at both ends of the exhaust pipe. The flanges have an airtight structure and are suitable for connecting to an exhaust gas input device or an exhaust gas treatment device.

[0031] In one possible embodiment, the heat tracing jacket includes a heat tracing gas port, which serves as either a heat tracing gas inlet or outlet depending on the connection sequence of the viscous organic waste gas pipe.

[0032] In one possible embodiment, the organic waste gas pipe containing viscous substances includes an external sealing box. The external sealing box is disposed on the outside of the connection between the two waste gas pipes, and heat tracing jacket pipes are sealed to both sides of the external sealing box.

[0033] In one possible embodiment, the jacket end plate has an airflow distribution hole inside, and a flange threaded connection hole is provided on the outside of the jacket end plate, and the outside of the jacket end plate is connected to the sealing box.

[0034] In one possible embodiment, the heat tracing jacket includes at least three airflow distributors with baffle structures.

[0035] In one possible embodiment, a temperature control device is provided on the heat tracing jacket. The temperature control device measures the internal temperature of the heat tracing jacket, and when the internal temperature is lower than the condensation temperature of the viscous organic matter inside, the temperature control device controls the heat generating device to generate heat and input it into the heat tracing jacket through the heat tracing gas port.

[0036] In one possible embodiment, the jacket end plate has airflow distribution holes inside.

[0037] In one possible embodiment, the outer sealed box is opened by sliding.

[0038] In one possible embodiment, the airflow distributor comprises uniform circular air holes.

[0039] Figure 1This diagram illustrates the main structure of a pipe device for organic waste gas containing viscous substances, according to an embodiment of this application. The pipe device 100 includes a waste gas pipe 101, a heat tracing jacket pipe 102, an expansion joint 103, an external sealing box 104, and a jacket end plate 105. The waste gas pipe 101 is made of heat-resistant, high-temperature-resistant, and corrosion-resistant metal material, has a cylindrical tubular structure, and is located at the center of the heat tracing jacket pipe 102, for the passage of organic waste gas containing tar and other viscous waste materials. The heat tracing jacket pipe 102 has a cylindrical tubular structure, for the passage of hot air required for jacketed hot air tracing, maintaining the operating temperature of the waste gas pipe 101. The expansion joint 103 has a spring-like structure, is located in the middle of the heat tracing jacket pipe 102, and is used to absorb the tensile and compressive stresses caused by the inconsistent expansion amounts between the waste gas pipe 101 and the heat tracing jacket pipe 102. The external sealing box 104 is connected to the jacket end plate 105. The exhaust pipe 101 has flange structures 106 at both ends, which can be connected to each other, to an exhaust gas input device, or to an exhaust gas treatment device. The flange structure 106 connection is airtight. The heat tracing jacket pipe 102 includes a heat tracing gas port 107, which can serve as the heat tracing gas inlet and outlet according to the flow direction of the heat tracing gas in the organic exhaust gas pipe device containing viscous substances. The external sealing box 104 is located at the connection point of the flange structures 106 of the two exhaust pipes. The heat tracing jacket pipe 102 includes at least three airflow distributors 108, which are baffles with uniform circular airflow distribution holes, allowing the heat tracing gas to flow uniformly within the heat tracing jacket pipe 102. A temperature control device 109 is provided on the heat tracing jacket pipe 102. The temperature control device 109 measures the internal temperature of the heat tracing jacket tube 102. When the internal temperature is below 550 degrees Celsius, the temperature control device 109 controls the heat gas generating device to generate heat tracing gas and inputs it into the heat tracing jacket tube 102 through the heat tracing gas port 107. The jacket end plate 105 is provided with airflow distribution holes, which can make the heat tracing gas flow evenly in the heat tracing jacket tube 102.

[0040] It should be noted that although the above description uses 550 degrees Celsius as an example to illustrate the working process of the temperature control device, those skilled in the art will understand that this application is not limited to this. In fact, users can flexibly set the measurement reaction temperature of the temperature control device according to their personal preferences and / or actual application scenarios, as long as the viscous organic matter in the exhaust pipe does not adhere to the exhaust pipe due to excessively low temperature.

[0041] Figure 2This diagram illustrates the connection between the viscous organic waste gas pipe device and external equipment according to an embodiment of this application. The overall structure includes carbon fiber production equipment 201, a viscous organic waste gas pipe 100, a combustion fan 202, a shell-cooled fan 203, organic waste gas treatment equipment 204, waste heat recovery equipment 205, a preheated air pipe 206, and an exhaust chimney 207. The exhaust outlet of the carbon fiber production equipment 201 is connected to the exhaust inlet of the viscous organic waste gas pipe 100, and the exhaust outlet of the viscous organic waste gas pipe 100 is connected to the organic waste gas treatment equipment 204. After the organic waste gas treatment equipment 204 treats the waste gas transmitted through the viscous organic waste gas pipe to meet emission standards, it is discharged through the exhaust chimney 207. The waste gas treatment equipment includes a combustion fan 202 and a shell-cooled fan 203 for heating or cooling related equipment. The preheated air pipe 206 is used to preheat the exhaust gas, and the waste heat recovery device 205 is used to collect the waste heat of the system to reduce the system's energy consumption.

[0042] It should be noted that although the connection relationship between the pipe device for transmitting viscous organic waste gas and external equipment has been described above using carbon fiber production equipment as an example, those skilled in the art will understand that this application is not limited to this. In fact, users can flexibly configure the external equipment connected to the pipe device for transmitting viscous organic waste gas according to their personal preferences and / or actual application scenarios, as long as the pipe device is used to transmit viscous organic waste gas.

[0043] Figure 3 This diagram illustrates the structural method of opening the external sealing box of the organic waste gas pipe containing viscous substances according to an embodiment of this application. The external sealing box 104 is opened by sliding 301. The upper and lower baffles of the external sealing box 104 can be slidably opened via slide rails on the external sealing box 104, allowing workers to maintain the flange structure 106 connection portion without disassembling the pipe.

[0044] Figure 4 This diagram illustrates the principle of heat insulation using a flange structure for the jacketed end plate, as described in an embodiment of this application. The jacketed end plate 105 has an airflow distribution hole 401 inside. The airflow distribution hole 401's outlet is sealed externally to the internal cavity. A flange hole is opened on the outer side of the end plate for connecting to the sealing box flange, and the airflow distribution hole is opened on the inner side to ensure uniform airflow distribution and flow. The tracing gas can flow evenly from one side of the jacketed end plate 105 to the other side in the direction of 402. The tracing gas can heat the flange structure 106, preventing the condensation of low-temperature tar at that location.

[0045] It should be noted that although the process of heating the flange structure with heat tracing gas has been described above using flow direction 402 as an example, those skilled in the art will understand that this application is not limited to this. In fact, users can flexibly set the flow direction of the heat tracing gas according to their personal preferences and / or actual application scenarios, as long as the flange structure can be heated and insulated during the external sealing process.

[0046] Thus, by installing the viscous organic waste gas pipe included in this application in the production line that discharges viscous organic waste, according to the description of the above embodiments of this application, this application can effectively ensure the flow of viscous organic waste gas in the pipe and prevent the accumulation of viscous organic waste in the pipe.

[0047] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A viscous organic waste gas pipe comprising, The application relates to a waste gas pipe, a heat jacket pipe and an expansion joint. The waste gas pipe is a cylindrical pipe structure, is located in the inner center of the heat jacket pipe, and is used for passing through organic waste gas containing sticky waste materials. The heat jacket pipe has a cylindrical pipe structure, is sleeved outside the waste gas pipe, heats the waste gas pipe, and keeps the waste gas pipe at a working temperature; and the heat jacket pipe is two or more. The expansion joint is a telescopic structure, and two or more heat jacket pipes are connected through the expansion joint. Flange structures are arranged at two ends of the waste gas pipe, the flanges have air-tight structures, are suitable for connecting input waste gas devices or connecting waste gas treatment devices.

2. The viscous-containing organic exhaust duct according to claim 1, wherein The heat jacket pipe comprises heat air inlets and outlets, the heat air inlets and outlets are used as heat air inlets or heat air outlets according to the connecting sequence of the waste gas pipe.

3. The viscous-containing organic exhaust duct according to claim 1, wherein An external sealing box is further arranged.

4. The viscous-containing organic exhaust duct according to claim 1, wherein The external sealing box is arranged outside the connecting position of two waste gas pipes, and the external sealing box is sealingly connected with the heat jacket pipes on both sides. End plates of the heat jacket pipe are arranged at two ends of the external sealing box, airflow distribution holes are arranged in the end plates, flange screw connection holes are arranged outside the end plates, and the end plates are connected with the external sealing box.

5. The viscous-containing organic exhaust duct according to claim 4, wherein At least one airflow distributor is arranged in the heat jacket pipe, the number of the airflow distributors is arranged according to the length of the waste gas pipe, the airflow distributors are fixed inside the heat jacket pipe and slide outside the waste gas pipe.

6. The viscous-containing organic exhaust duct according to claim 3, wherein A temperature control device is arranged on the heat jacket pipe.

7. The viscous-containing organic waste gas pipe according to claim 3, wherein The temperature control device measures the internal temperature of the heat jacket pipe, when the internal temperature is lower than the condensation temperature of the sticky organic materials, the temperature control device controls a heat air generating device to generate heat air and input the heat air into the heat jacket pipe through the heat air inlets and outlets. Airflow distribution holes are arranged in the end plates.

8. The viscous-containing organic waste gas pipe according to claim 5, wherein The external sealing box is opened in a sliding mode.

9. The viscous-containing organic waste gas pipe according to claim 4, wherein The airflow distributors comprise uniformly distributed circular air holes.

10. The viscous-containing organic waste gas pipe according to claim 6, wherein ​

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