Thermal cracking heating equipment

Abstract

The utility model provides thermal cracking heating equipment, which belongs to the technical field of thermal cracking heating and comprises a heat compensation heating furnace for providing heat for a reaction kettle body, and the heat compensation heating furnace comprises a furnace body, a combustion chamber barrel and a combustion net; the combustion chamber barrel is arranged in the furnace body, and the combustion chamber barrel and the furnace body define a jacket for flue gas circulation; a gas mixing chamber is defined by a gas outlet of the combustion chamber barrel and the gas outlet end of the furnace body. The combustion chamber barrel is sleeved with a first spiral blade; an inner cavity of the gas outlet end of the combustion chamber barrel is in a cone shape reducing in the gas outlet direction; the combustion net is arranged on the side, close to the air inlet of the combustion chamber barrel, in the combustion chamber barrel, a combustion chamber is defined by the combustion net, and the combustion net is sleeved with a second spiral blade. The combustion furnace solves the technical problems that an existing combustion furnace is large in heat loss and high in potential safety hazard, and has the advantages of being capable of effectively improving the energy utilization rate and guaranteeing safety.

Description

Technical Field

[0001] The utility model belongs to the technical field of thermal cracking heating, and in particular relates to thermal cracking heating equipment. Background Art

[0002] Pyrolysis of waste tires involves an irreversible thermochemical reaction in an oxygen-free or oxygen-deficient atmosphere, using high temperatures to decompose the organic matter in waste tires, releasing volatile products and forming solid char. This incomplete thermal degradation process can produce gaseous, liquid, and solid products. This method can completely pyrolyze waste tires into useful products such as pyrolysis oil, pyrolysis carbon black, and pyrolysis non-condensable gases. To maintain a high temperature, the reactor where the pyrolysis reaction takes place must be heated, which requires a significant amount of energy.

[0003] The commonly used heating method is to use a combustion furnace to provide high-temperature flue gas to a heating box outside the reactor body, thereby heating the material inside the reactor body. However, the existing combustion furnaces often have problems such as large heat loss and high safety hazards. Utility Model Content

[0004] The details of one or more embodiments of the present invention are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent.

[0005] The utility model provides a thermal cracking heating device, which solves the technical problems of large heat loss and high safety hazards in existing combustion furnaces, and has the characteristics of being able to effectively improve energy utilization and ensure safety.

[0006] The utility model discloses a thermal cracking heating device, comprising a supplementary heating furnace for providing heat to a reactor body, the supplementary heating furnace comprising a furnace body, a combustion chamber cylinder, and a combustion net; the combustion chamber cylinder is arranged in the furnace body, and the combustion chamber cylinder and the furnace body define a jacket for flue gas circulation; the air outlet of the combustion chamber cylinder and the air outlet end of the furnace body define an air mixing chamber; the combustion chamber cylinder is outer-mounted with a first spiral blade; the inner cavity of the air outlet end of the combustion chamber cylinder is a cone with a reduced diameter along the air outlet direction; the combustion net is arranged in the combustion chamber cylinder on the side close to the air inlet of the combustion chamber cylinder, and the combustion net defines a combustion chamber, and the combustion net is outer-mounted with a second spiral blade.

[0007] In some embodiments, the combustion net includes a cylindrical portion close to the air inlet side of the combustion chamber cylinder, and a conical portion connected to the cylindrical portion, and the end of the conical portion away from the cylindrical portion defines the air outlet of the combustion net, and the conical portion is a reducing structure along the air outlet direction.

[0008] In some embodiments, a plurality of flame-spraying holes are formed on the cylindrical portion, and the second spiral blade is sleeved outside the cylindrical portion.

[0009] In some embodiments, the invention further comprises a burner connected to the combustion chamber, and a fuel inlet pipe for providing fuel to the combustion chamber.

[0010] In some embodiments, a heating box is provided outside the reactor body; the high-temperature flue gas generated by the combustion of fuel in the combustion chamber is mixed with the flue gas flowing through the jacket and enters the mixing chamber to obtain high-temperature flue gas, which is transported into the heating box through a pipeline to provide heat for the reactor body.

[0011] In some embodiments, a recycling pipe connected to the air outlet of the heating box is further included, and an air outlet of the recycling pipe is connected to the air inlet of the jacket.

[0012] In some embodiments, a heat exchanger is further included, wherein one air inlet of the heat exchanger is connected to a high-pressure blower, and the high-pressure blower sends external air into the heat exchanger; the other air inlet of the heat exchanger is connected to the other air outlet of the recycling pipe.

[0013] In some embodiments, heat exchange tubes are provided in the heat exchanger, and the shell of the heat exchanger and the heat exchange tubes define a shell layer; the air outlet of the high-pressure blower is connected to the air inlet of the heat exchange tubes, and the air outlet of the heat exchange tubes is connected to the air inlet of the burner; another air outlet of the return pipe is connected to the air inlet of the shell layer.

[0014] In some embodiments, a desulfurization fan is further included, and the air inlet of the desulfurization fan is connected to the air outlet of the shell.

[0015] In some embodiments, a circulation fan is provided on the recycling pipeline, and an explosion vent is provided on the furnace body.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] The utility model provides a thermal cracking heating device, which adopts a supplementary heat heating furnace to provide heat for a reactor body, and effectively improves energy utilization while ensuring safety by limiting the structure of the supplementary heat heating furnace. Specifically, a first spiral blade is arranged outside the combustion chamber cylinder as a flue exhaust guide blade to prevent the entering high-temperature flue exhaust gas from short-circuiting when moving to the right; by limiting the inner cavity of the gas outlet end of the combustion chamber cylinder to be a cone with a reduced diameter along the gas outlet direction, the busbar of the furnace wall on the upper part of the furnace is made into an arc cone shape to converge and disperse the fire head pressure, so that the flame can smoothly enter the flue; by arranging a second spiral blade outside the combustion net as a guide blade, it can prevent the high-temperature flue gas from generating vortexes during injection, resulting in defects such as poor airflow, energy loss, and noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic diagram of the structure of a thermal cracking heating device provided in an embodiment of the present utility model;

[0020] Figure 2 A schematic structural diagram of a combustion chamber cylinder provided in an embodiment of the present utility model;

[0021] Figure 3 A schematic diagram of the structure of the combustion network provided by an embodiment of the utility model;

[0022] In the above figures: 1. Supplementary heat heating furnace; 101. Furnace body; 102. Combustion chamber cylinder; 103. Jacket; 104. Mixing chamber; 105. First spiral blade; 106. Combustion net; 107. Combustion chamber; 108. Second spiral blade; 109. Flame hole; 2. Burner; 3. Heating box; 4. Return pipe; 5. Heat exchanger; 6. High-pressure blower; 7. Desulfurization fan; 8. Circulation fan. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Based on the embodiments provided by the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0024] The present invention provides a thermal cracking heating device. Figure 1Schematic diagram of the structure of the thermal cracking heating device according to the embodiment of the present invention. Figure 1 As shown, the thermal cracking heating device at least includes a supplementary heating furnace 1 for providing heat to the reactor body, and the supplementary heating furnace 1 includes a furnace body 101, a combustion chamber barrel 102, and a combustion net 106; the combustion chamber barrel 102 is arranged in the furnace body 101, and the combustion chamber barrel 102 and the furnace body 101 define a jacket 103 for flue gas circulation; the gas outlet of the combustion chamber barrel 102 and the gas outlet end of the furnace body 101 define a gas mixing chamber 104; Figure 2 As shown, the combustion chamber cylinder 102 is provided with a first spiral blade 105; the inner cavity of the gas outlet end of the combustion chamber cylinder 102 is a cone with a reduced diameter along the gas outlet direction; the combustion net 106 is provided in the combustion chamber cylinder 102 near the air inlet side of the combustion chamber cylinder 102, and the combustion net 106 defines a combustion chamber 107, as shown in FIG. Figure 3 As shown, the combustion mesh 106 is provided with a second spiral blade 108 on its outer cover.

[0025] The above-mentioned thermal cracking heating equipment adopts a supplementary heating furnace 1 to provide heat for the reactor body. By limiting the structure of the supplementary heating furnace 1, the energy utilization rate is effectively improved while ensuring safety. Specifically, a first spiral blade 105 is arranged outside the combustion chamber cylinder 102 as a flue exhaust guide blade to prevent the entering high-temperature flue exhaust gas from short-circuiting when moving to the right; by limiting the inner cavity of the gas outlet end of the combustion chamber cylinder 102 to a cone with a reduced diameter along the gas outlet direction, the busbar of the upper furnace wall of the furnace is made into an arc cone shape to converge and disperse the fire head pressure so that the flame can smoothly enter the flue; by arranging a second spiral blade 108 as a guide blade outside the combustion net 106, it can prevent the high-temperature flue gas from generating vortexes during injection, resulting in poor airflow, energy loss, noise and other disadvantages.

[0026] In order to further converge and disperse the fire head pressure so that the flame in the combustion chamber 107 can smoothly enter the mixing chamber 104, the combustion net 106 includes a cylindrical portion on the air inlet side close to the combustion chamber cylinder 102, and a conical portion connected to the cylindrical portion. The end of the conical portion away from the cylindrical portion defines the air outlet of the combustion net 106, and the conical portion is a reducing structure along the air outlet direction.

[0027] In order to evenly distribute the fuel gas and the combustion-supporting air and ensure a stable and efficient combustion process, a plurality of flame-spraying holes 109 are opened on the cylindrical portion, and the second spiral blade 108 is sleeved outside the cylindrical portion.

[0028] Some embodiments further include a burner 2 connected to the combustion chamber 107 and a fuel inlet pipe for supplying fuel to the combustion chamber 107. A heating box 3 is disposed outside the reactor body. The high-temperature flue gas generated by the combustion of the fuel in the combustion chamber 107 is mixed with the flue gas flowing through the jacket 103 and into the gas mixing chamber 104. The resulting high-temperature flue gas is transported through a pipe to the heating box 3 to provide heat for the reactor body.

[0029] To achieve heat reuse and improve heat utilization, a return pipe 4 is also included, connected to the air outlet of the heating box 3. One air outlet of the return pipe 4 is connected to the air inlet of the jacket 103. A heat exchanger 5 is further included. One air inlet of the heat exchanger 5 is connected to a high-pressure blower 6, which delivers external air into the heat exchanger 5. Another air inlet of the heat exchanger 5 is connected to another air outlet of the return pipe 4. In some embodiments, the heat exchanger 5 is provided with heat exchange tubes, and the shell of the heat exchanger 5 and the heat exchange tubes define a shell layer. The air outlet of the high-pressure blower 6 is connected to the air inlet of the heat exchange tubes, which is connected to the air inlet of the burner 2. Another air outlet of the return pipe 4 is connected to the air inlet of the shell layer. The high-pressure blower 6 sends external air into the heat exchange tubes in the heat exchanger 5 for heat exchange, and then enters the burner 2; the flue gas transported to the heat exchanger 5 through the return pipe 4 circulates through the shell side of the heat exchanger 5 and exchanges heat with the air in the heat exchange tubes. The commonly used heating method is to provide heat to the thermal cracking reactor through high-temperature flue gas. However, the temperature of the high-temperature flue gas after heating is often still relatively high. Direct discharge not only poses a safety hazard, but also causes heat waste. This embodiment realizes the further utilization of the heat of the heated flue gas and improves the heat utilization rate. In some embodiments, a circulating fan 8 is provided on the return pipe 4, and an explosion vent is provided on the furnace body 101.

[0030] Furthermore, a desulfurization blower 7 is included, the air inlet of which is connected to the air outlet of the shell. After heating, the flue gas discharged is transported to the external desulfurization and denitrification tower through an output main pipeline. The output main pipeline is equipped with a flow control valve, which is interlocked with the desulfurization blower 7 to control the pressure within the pyrolysis kettle heating box 3.

[0031] The working process of the above-mentioned pyrolysis heating equipment is as follows:

[0032] The main function of the circulating heat exchanger 5 is to utilize the principle of heat exchange between high-temperature and low-temperature gases. High-temperature flue gas is introduced into the circulating heat exchanger 5, where it undergoes heat exchange with the low-temperature gas supplied by the high-pressure blower 6. Ultimately, hot air at a higher temperature is output for use by the burner 2. This recovers heat from the exhaust gas, reduces energy consumption and production costs, and minimizes environmental pollution. The circulating heat exchanger 5 is installed horizontally. The flue gas outlet is located on the left side of the housing and is connected to the pipe below the flow control valve of the output main pipeline. The flue gas inlet is located on the right side of the housing and is connected to the flue gas input pipeline. This flue gas input pipeline is equipped with a flow control valve to control the flow of heated flue gas into the circulating heat exchanger 5. An air inlet is located on the lower right side of the front of the circulating heat exchanger 5 housing. High-pressure blower 6 draws external air into the internal heat exchanger tubes. The heat exchange air outlet is located vertically on the upper left side of the housing. A local pressure gauge is located on the upper right side of the housing to monitor the supply air pressure within the circulating heat exchanger 5. The hot air outlet of the circulating heat exchanger 5 is connected to the hot air output duct, which delivers the heated air to the hot air inlet of the burner 2 for fuel distribution. The high-temperature flue gas of the circulating heat exchanger 5 flows through the inner wall of the heat exchange tubes, while the preheated air flows through the outer wall of the heat exchange tubes.

[0033] The function of the supplementary heating furnace 1 is to recycle heat energy. The exhaust flue gas passes through the supplementary heating furnace 1 to exchange heat between the untreated high-temperature flue gas and the low-temperature medium (such as air), thereby realizing waste heat recovery. The left end plate of the supplementary heating furnace 1 is provided with a burner 2 mounting seat, and the burner 2 is docked and fixed thereto. A base is provided at the lower part of the supplementary heating furnace for fixing the furnace body 101 for operation. The burner 2 provides heat energy for the supplementary heating furnace 1. The fuel inlet device of the burner 2 is on the left side of the burner 2 and is connected to the fuel inlet pipe. The fuel used is provided by an external storage tank. The hot air inlet of the burner 2 is vertically arranged on the upper part of the shell and is connected to the hot air output pipe of the circulating heat exchanger 5 to provide high-temperature distribution air for the burner 2. A fire viewing port is provided on the upper part of the left end plate of the supplementary heating furnace 1 for observing the combustion conditions in the supplementary heating furnace 1. A flue gas inlet is provided on the left side of the upper part of the shell of the supplementary heating furnace 1, which is connected to the flue gas input main pipeline, and the high-temperature flue gas discharged from the pyrolysis kettle heating box 3 is reintroduced into the supplementary heating furnace 1 for recycling, providing heat energy for the pyrolysis kettle. A gravity-type explosion vent is vertically provided in the middle part of the upper part of the supplementary heating furnace 1. When the pressure in the supplementary heating furnace 1 exceeds the set standard, it can automatically release the pressure, thereby ensuring the safe operation of the supplementary heating furnace 1. An on-site thermometer and an on-site pressure gauge of the supplementary heating furnace 1 are vertically provided on the right side of the shell of the supplementary heating furnace 1, which are used to detect the temperature and pressure inside the furnace body 101. The flue gas input jacket 103 of the supplementary heating furnace 1 is filled with thermal insulation material to prevent the internal high-temperature flue gas from dissipating heat.

[0034] The high-temperature flue gas output by the burner 2 first passes through the high-temperature combustion net 106 for mixed combustion. The high-temperature combustion net 106 is provided with a varying number of flame holes 109. The main function of the flame holes 109 on the combustion net 106 is to evenly distribute the fuel gas and combustion-supporting air to ensure the stability and efficiency of the combustion process. The outer wall of the high-temperature combustion net 106 is also provided with guide vanes, whose function is to prevent the high-temperature flue gas from generating vortices during injection, resulting in poor airflow, energy loss, noise and other drawbacks. The high-temperature combustion and mixing chamber cylinder of the supplementary heating furnace is arranged outside the high-temperature combustion net 106, and the high-temperature flue gas ejected from the flame holes 109 enters the mixing combustion chamber 107 of the supplementary heating furnace for combustion. The right side of the high-temperature combustion and mixing chamber cylinder adopts a conical design, which is used to make the busbar of the upper furnace wall of the furnace into an arc cone shape to converge and disperse the fire head pressure so that the flame can smoothly enter the flue. The outer wall of the high-temperature combustion and mixing chamber is equipped with flue gas guide vanes to prevent the incoming high-temperature flue gas from short-circuiting as it moves to the right. Guide vanes are also installed on the outer edge of the straight pipe outlet at the rear end of the conical body of the high-temperature combustion and mixing chamber. The high-temperature flue gas generated by the mixed combustion chamber 107 and the flue gas introduced by the flue gas input jacket 103 of the supplementary heating furnace 1 are collected in the mixing chamber 104 and connected to the high-temperature flue gas outlet pipe through the high-temperature flue gas outlet. A control valve is installed on the high-temperature flue gas outlet pipe, connecting it to the high-temperature flue gas inlet of the pyrolysis reactor heating box 3. The high-temperature flue gas inlet is located on the lower left side of the heating box 3, and the heating box 3 is equipped with high-temperature flue gas guide vanes. The high-temperature flue gas outlet is located vertically on the upper right side of the box and connected to a flow control valve. The heating box 3 houses the pyrolysis reactor, and the heat input from the heating box 3 is used to heat the materials within the pyrolysis reactor. The flow control valve is connected to the high-temperature flue exhaust gas output pipe, and the output high-temperature flue exhaust gas is sent to the flue exhaust gas inlet of the high-temperature circulation fan 8. Under the action of the high-temperature circulation fan 8, the high-temperature flue exhaust gas moves toward the flue exhaust gas outlet of the high-temperature circulation fan 8 and circulates into the supplementary heat combustion heating furnace for use.

[0035] The advantages of the above-mentioned pyrolysis heating equipment are mainly reflected in that the supplementary heating furnace 1 can realize the recovery of waste heat of flue gas by exchanging heat with gas medium and supplementing heat, which can help recover a large amount of heat energy in the flue gas of tire pyrolysis and utilize it, saving energy and reducing thermal pollution and heat loss. Specifically, it includes:

[0036] 1. Efficient treatment of exhaust gas: The supplementary heating furnace 1 adopts high-temperature combustion technology, which can effectively treat various flue tail gases with a utilization rate of more than 99%, thus achieving efficient utilization of flue tail gases;

[0037] 2. Energy saving and emission reduction: During the combustion process of the supplementary heating furnace 1, the heat can be recycled and used to preheat the incoming air, thereby reducing fuel consumption and greenhouse gas emissions, and achieving energy saving and emission reduction;

[0038] 3. Environmental protection and pollution-free: The supplementary heating furnace 1 adopts advanced flue gas treatment technology to effectively reduce the emission of harmful substances in the flue gas, such as dioxins and nitrogen oxides, so that its emission standards meet environmental protection requirements and achieve green and environmentally friendly production;

[0039] 4. Economic benefits: The supplementary heating furnace 1 can realize the recycling of waste gas, saving energy costs for the enterprise and improving economic benefits. At the same time, by reducing the emission of toxic and harmful waste gas, it reduces the risk of the enterprise being punished by the environmental protection department and improves the social image of the enterprise;

[0040] 5. The equipment is safe and reliable: the supplementary heating furnace 1 can also adopt advanced automatic control technology to ensure the safety and stability of the equipment during operation. At the same time, the equipment has a compact structure and is easy to operate and maintain, which reduces the failure rate and maintenance cost of the equipment.

[0041] In summary, supplementary combustion heating furnaces, with their high energy efficiency, environmental protection, energy conservation, safety, and reliability, provide a more environmentally friendly and economical energy solution for modern industrial and civilian applications. Furthermore, flue gas supplementary combustion furnaces produce low flue gas emissions, significantly reducing environmental pollution and meeting national environmental protection requirements. They offer high safety, a stable combustion process, and are less susceptible to fire and explosion, ensuring safe use.

[0042] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0043] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A thermal cracking heating device, characterized in that: A supplementary heating furnace for providing heat to the reactor body, the supplementary heating furnace comprising: furnace body; A combustion chamber cylinder, the combustion chamber cylinder being disposed within the furnace body, and the combustion chamber cylinder and the furnace body defining a jacket for flue gas circulation; an air outlet of the combustion chamber cylinder and an air outlet end of the furnace body defining an air mixing chamber; a first spiral blade being disposed on the outer shell of the combustion chamber cylinder; and an inner cavity of the air outlet end of the combustion chamber cylinder being tapered with a decreasing diameter along the air outlet direction; The combustion net is arranged in the combustion chamber cylinder near the air inlet side of the combustion chamber cylinder, and the combustion net defines a combustion chamber. The combustion net is outer-circuited with a second spiral blade.

2. The thermal cracking heating equipment according to claim 1, characterized in that: The combustion net includes a cylindrical portion close to the air inlet side of the combustion chamber cylinder, and a conical portion connected to the cylindrical portion. The end of the conical portion away from the cylindrical portion defines the air outlet of the combustion net, and the conical portion is a reducing structure along the air outlet direction.

3. The thermal cracking heating equipment according to claim 2, characterized in that: A plurality of flame-spraying holes are provided on the cylindrical portion, and the second spiral blade is sleeved outside the cylindrical portion.

4. The thermal cracking heating equipment according to claim 1, characterized in that: The invention also includes a burner connected to the combustion chamber, and a fuel inlet pipe for providing fuel to the combustion chamber.

5. The thermal cracking heating equipment according to claim 4, characterized in that: A heating box is provided outside the reactor body; the high-temperature flue gas generated by the combustion of fuel in the combustion chamber is mixed with the flue gas flowing through the jacket and enters the gas mixing chamber to obtain high-temperature flue gas that is transported to the heating box through a pipeline to provide heat for the reactor body.

6. The thermal cracking heating device according to claim 5, characterized in that: It also includes a recycling pipe connected to the air outlet of the heating box, and an air outlet of the recycling pipe is connected to the air inlet of the jacket.

7. The thermal cracking heating device according to claim 6, characterized in that: It also includes a heat exchanger, one air inlet of the heat exchanger is connected to a high-pressure blower, and the high-pressure blower sends external air into the heat exchanger; the other air inlet of the heat exchanger is connected to the other air outlet of the recycling pipeline.

8. The thermal cracking heating device according to claim 7, characterized in that: The heat exchanger is provided with heat exchange tubes, and the shell of the heat exchanger and the heat exchange tubes define a shell layer; the air outlet of the high-pressure blower is connected to the air inlet of the heat exchange tubes, and the air outlet of the heat exchange tubes is connected to the air inlet of the burner; the other air outlet of the return pipe is connected to the air inlet of the shell layer.

9. The thermal cracking heating device according to claim 8, characterized in that: It also includes a desulfurization fan, and the air inlet of the desulfurization fan is connected to the air outlet of the shell.

10. The thermal cracking heating device according to claim 6, characterized in that: A circulating fan is provided on the recycling pipeline, and an explosion vent is provided on the furnace body.

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