Biomass combustion conduction oil boiler for high-temperature pyrolysis waste gas

Abstract

The utility model discloses a kind of biomass combustion heat-conducting oil boiler of high-temperature pyrolysis waste gas, including heat exchange chamber, combustion chamber, gas cracking device, heat-conducting oil coil, fuel conveying device;Heat exchange chamber is fixedly connected above combustion chamber, and heat exchange chamber top is equipped with smoke outlet II, bottom inlet port;Heat-conducting oil coil is set in heat exchange chamber inside, gas cracking device is connected with heat exchange chamber two sides by passing between heat-conducting oil coil;Fuel conveying device is fixed in heat exchange chamber one side by support support, and fuel conveying device bottom is fixedly connected with inlet port.The utility model mixes mixed gas formed after oil refining evaporation waste gas and flue gas of boiler combustion by gas cracking device and is transported to heat-conducting oil boiler to carry out high-temperature pyrolysis, effectively solve the environmental protection and peculiar smell problem in oil refining process, and the heat of mixed cracking gas after high-temperature pyrolysis can also be released and waste heat is recycled.

Description

Technical Field

[0001] This utility model belongs to the technical field of thermal oil boilers, and specifically relates to a biomass combustion thermal oil boiler for high-temperature pyrolysis waste gas. Background Technology

[0002] In the process of refining animal fats from heat transfer oil, the heat transfer oil needs to be heated by burning fuel in a heat transfer oil boiler to provide a stable heat source for the refining pot. This process is accompanied by two main types of waste gases: first, a large amount of hot flue gas generated by the combustion of boiler fuel, which, if directly emitted, is not only a waste of energy but also causes thermal pollution to the local environment; second, the refining evaporation waste gas formed by the evaporation of moisture and volatile substances in the oil in the high-temperature heat transfer oil pot, which not only emits a foul odor but also pollutes the environment if directly emitted. Therefore, it is necessary to purify the waste gases generated during the animal fat refining process to prevent the refining evaporation waste gas from polluting the environment.

[0003] According to the existing technology announcement number CN223179043U, a thermal oil boiler is described. This device transfers the heat generated by the burner to the thermal oil in the first oil supply pipe through a first heat exchanger, and transfers the heat of the flue gas in the exhaust pipe to the thermal oil in the second oil supply pipe through a second heat exchanger, thereby maximizing the recovery of the heat generated by the burner combustion.

[0004] A search revealed a waste heat recovery device for a thermal oil boiler with the existing technology announcement number CN222480777U. This device uses the heat energy provided by the combustion of fossil fuels to heat the thermal oil. The waste gas is treated and heat-absorbing by a flocculant aqueous solution in the waste heat recovery water tank. The flocculant aqueous solution absorbs the heat energy in the waste gas and then heats the thermal oil in the return oil pipe. Furthermore, the heat energy diffused in the waste gas after being treated by the waste heat recovery water tank can also be used to preheat the fossil fuels, thus maximizing the recovery and utilization of heat energy in the waste gas.

[0005] However, both of the above devices can only heat the heat transfer oil and recover waste heat from the flue gas generated by fuel combustion. The oil refining evaporation waste gas generated during the refining of animal fats also needs to be purified by external equipment. Therefore, a biomass combustion heat transfer oil boiler that can pyrolyze waste gas at high temperature is needed, which can pyrolyze the oil refining evaporation waste gas while heating the heat transfer oil. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a biomass combustion thermal oil boiler for high-temperature pyrolysis of waste gas. The mixed gas formed by mixing the oil refining evaporation waste gas with the flue gas from the boiler combustion is transported to the thermal oil boiler through a gas pyrolysis device for high-temperature pyrolysis. This not only decomposes pollutants and odors in the high-temperature environment of the thermal oil boiler, achieving harmless treatment of waste gas and effectively solving the environmental protection and odor problems in the oil refining process, but also allows for the recovery and utilization of the heat released by the mixed pyrolysis gas after high-temperature pyrolysis.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A biomass combustion thermal oil boiler for high-temperature pyrolysis waste gas includes a heat exchange chamber, a combustion chamber, a gas pyrolysis device, thermal oil coils, and a fuel conveying device. The heat exchange chamber is fixedly connected above the combustion chamber, and has a flue gas outlet II at the top and a feed inlet at the bottom. The thermal oil coils are disposed inside the heat exchange chamber, and the gas pyrolysis device passes through the thermal oil coils and connects to both sides of the heat exchange chamber. The fuel conveying device is supported and fixed to one side of the heat exchange chamber by a bracket, and its bottom is fixedly connected to the feed inlet.

[0009] The combustion chamber has a slag removal port on one side and a clean air oxygen supply port on the other side, and the grate is fixedly connected to the inside of the combustion chamber; the combustion chamber is equipped with a burner.

[0010] The gas pyrolysis device includes an inlet gas collection box, an inlet pipe I, an outlet pipe, an outlet gas collection box, an exhaust port, an inlet pipe II, a connecting pipe I, a connecting pipe II, and a connecting pipe III. The inlet gas collection box is located on one side of the heat exchange chamber, with one end of the inlet pipe I fixedly connected to the top of the inlet gas collection box, and several outlet pipes are provided on one side of the inlet gas collection box. The outlet gas collection box is located on the other side of the heat exchange chamber, with several inlet pipes II provided on one side of the outlet gas collection box, and one end of the exhaust port is fixedly connected to the other side of the outlet gas collection box, while the other end is fixedly connected to a fan. The connecting pipes I, II, and III are arranged sequentially inside the heat exchange chamber, and both ends of the connecting pipes I, II, and III pass through through holes on both sides of the heat exchange chamber and are fixedly connected to the outlet pipe and the inlet pipe II, respectively.

[0011] The heat transfer oil coil is fixedly connected to the heat exchange chamber via several connecting plates, and the oil inlet of the heat transfer oil coil is fixedly connected to the bottom of the heat exchange chamber, while the oil outlet of the heat transfer oil coil is fixedly connected to the top of the heat exchange chamber. The heat transfer oil coil is a double-layer heat transfer oil coil, and the heat transfer oil coil is arranged around connecting pipe I, connecting pipe II, and connecting pipe III. The oil inlet is connected to the outlet of the hot oil pump via a pipe, and the oil outlet is connected to the inlet of the hot oil pump via a pipe.

[0012] The fuel conveying device includes a screw feeder, a hopper, and a blower; the hopper is fixedly connected to the top of the support, the screw feeder is fixedly connected to the bottom of the hopper, and the screw feeder is fixedly connected to the feed inlet through a pipe; the blower is fixedly connected to one side of the support through a connecting seat, and the air outlet of the blower is fixedly connected to one end of the screw feeder.

[0013] The advantages of this utility model compared with the prior art are as follows:

[0014] The mixed gas formed by mixing the evaporation waste gas from oil refining with the flue gas from boiler combustion is transported to the thermal oil boiler through a gas pyrolysis device for high-temperature pyrolysis. This not only decomposes pollutants and odors in the high-temperature environment of the thermal oil boiler, achieving harmless treatment of waste gas and effectively solving the environmental protection and odor problems in the oil refining process, but also allows for the recovery and utilization of the heat released by the mixed pyrolysis gas after high-temperature pyrolysis. Attached Figure Description

[0015] Appendix Figure 1 This is a schematic diagram of the structure of a biomass combustion heat transfer oil boiler for high-temperature pyrolysis waste gas according to this utility model.

[0016] Appendix Figure 2 It is attached Figure 1 A schematic diagram of the structure on the other side of the heat exchanger and combustion chamber;

[0017] Appendix Figure 3 It is attached Figure 1 A schematic diagram of the structure of the fuel delivery device;

[0018] Appendix Figure 4 It is attached Figure 1 Schematic diagram of the middle combustion chamber;

[0019] Appendix Figure 5 It is attached Figure 1 Schematic diagram of the connection structure between the gas pyrolysis unit, the heat transfer oil coil and the heat exchange chamber;

[0020] Appendix Figure 6 It is attached Figure 1 Top view of the internal structure of the heat exchanger chamber;

[0021] In the diagram: 1. Heat exchange chamber; 102. Exhaust port II; 103. Feed inlet; 2. Combustion chamber; 201. Slag removal port; 202. Clean air oxygen supply port; 203. Grate; 3. Gas pyrolysis device; 301. Inlet gas collection box; 3011. Inlet pipe I; 3012. Outlet pipe; 302. Outlet gas collection box; 3021. Exhaust port; 3022. Inlet pipe II; 303. Connecting pipe I; 304. Connecting pipe II; 305. Connecting pipe III; 4. Heat transfer oil coil; 401. Oil inlet; 402. Oil outlet; 403. Connecting plate; 5. Fuel conveying device; 501. Screw feeder; 502. Feed hopper; 503. Air distributor; 6. Support frame. Detailed Implementation

[0022] To facilitate understanding by those skilled in the art, the following is a detailed explanation in conjunction with the appendix. Figure 1-6 The technical solution of this utility model will be further described in detail below.

[0023] A biomass combustion thermal oil boiler for high-temperature pyrolysis waste gas includes a heat exchange chamber 1, a combustion chamber 2, a flue gas outlet II 102 at the top of the heat exchange chamber 1, and a feed inlet 103 at the bottom; the thermal oil coil 4 is disposed inside the heat exchange chamber 1, and the gas pyrolysis device 3 passes through the thermal oil coil 4 and is connected to both sides of the heat exchange chamber 1; the fuel conveying device 5 is supported and fixed to one side of the heat exchange chamber 1 by a bracket 6, and the bottom of the fuel conveying device 5 is fixedly connected to the feed inlet 103; the combustion chamber 2 has a slag removal port 201 on one side and a clean air oxygen supply port 202 on the other side, and the grate 203 is fixedly connected inside the combustion chamber 2; a burner is disposed inside the combustion chamber 2.

[0024] The gas pyrolysis device 3 includes an inlet gas collection box 301, an inlet pipe I 3011, an outlet pipe 3012, an outlet gas collection box 302, an exhaust port 3021, an inlet pipe II 3022, a connecting pipe I 303, a connecting pipe II 304, and a connecting pipe III 305. The inlet gas collection box 301 is located on one side of the heat exchange chamber 1. One end of the inlet pipe I 3011 is fixedly connected to the top of the inlet gas collection box 301, and several outlet pipes 3012 are provided on one side of the inlet gas collection box 301. The outlet gas collection box 302 is located on the other side of the heat exchange chamber 1. Several inlet pipes II 3022 are provided on one side of the outlet gas collection box 302, and one end of the exhaust port 3021 is fixedly connected to the other side of the outlet gas collection box 302, while the other end is fixedly connected to a fan. The connecting pipes I 303, II 304, and III 305 are as shown in the attached diagram. Figure 5 and attached Figure 6 As shown, they are arranged sequentially inside the heat exchange chamber 1, and the two ends of the connecting pipes I 303, II 304, and III 305 pass through the through holes on both sides of the heat exchange chamber 1 and are fixedly connected to the air outlet pipe 3012 and the air inlet pipe II 3022, respectively.

[0025] The heat transfer oil coil 4 is fixedly connected to the heat exchange chamber 1 through several connecting plates 403, and the oil inlet 401 of the heat transfer oil coil 4 is fixedly connected to the bottom of the heat exchange chamber 1, and the oil outlet 402 of the heat transfer oil coil 4 is fixedly connected to the top of the heat exchange chamber 1; the heat transfer oil coil 4 is a double-layer heat transfer oil coil, and the heat transfer oil coil 4 is arranged around the connecting pipe I 303, the connecting pipe II 304, and the connecting pipe III 305; the oil inlet 401 is connected to the liquid outlet of the hot oil pump through a pipe, and the oil outlet 402 is connected to the liquid inlet of the hot oil pump through a pipe.

[0026] The fuel conveying device 5 includes a screw feeder 501, a hopper 502, and an air distributor 503. The hopper 502 is fixedly connected to the top of the support 6, the screw feeder 501 is fixedly connected below the hopper 502, and the screw feeder 501 is fixedly connected to the feed inlet 103 through a pipe. The air distributor 503 is fixedly connected to one side of the support 6 through a connecting seat, and the air outlet of the air distributor 503 is fixedly connected to one end of the screw feeder 501.

[0027] A biomass combustion thermal oil boiler for high-temperature pyrolysis waste gas operates as follows:

[0028] The fuel conveying device 5 uses a screw feeder 501 to transport biomass fuel from the hopper 502 into the combustion chamber 2 above the grate 203. The biomass fuel is ignited by the burner to generate high-temperature flue gas, which heats the heat transfer oil coil 4 and the connecting pipes I 303, II 304, and III 305 in the gas pyrolysis device 3. At the same time, preheated outside clean air is introduced into the combustion chamber 2 through the clean air oxygen inlet 202 to provide oxygen for the combustion of biomass fuel. Most of the flue gas generated during combustion enters the dust removal device through the exhaust port II 102 on the heat exchange chamber 1 for treatment. Then, the flue gas after dust removal and the oil refining evaporation waste gas enter the gas mixing box together to form mixed waste gas to be pyrolyzed.

[0029] The mixed waste gas to be cracked enters the inlet gas collection box 301 through the inlet pipe I 3011, and then passes through the outlet pipe 3012 into the connecting pipe I 303, connecting pipe II 304, and connecting pipe III 305 for heating and cracking. The cracked gas passes through the inlet pipe II 3022 into the outlet gas collection box 302, and is extracted from the exhaust port 3021 by a fan for waste heat recovery and utilization. Finally, the gas that has completed waste heat recovery and utilization is further purified and then discharged.

[0030] Meanwhile, the heat transfer oil circulates sequentially through the hot oil pump, oil inlet 401, heat transfer oil coil 4, oil outlet 402, heat transfer oil heat exchange equipment, and hot oil pump, so that the heat transfer oil can be heated and exchanged continuously.

[0031] Finally, the ash from the combustion of biomass fuel falls through the grate 203 to the bottom of the combustion chamber 2. At this point, the ash removal port 201 can be opened to clean the ash in the combustion chamber 2.

[0032] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," "top," "bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, the connection methods are divided into fixed connection and movable connection. Fixed connection methods include, but are not limited to, welding and bolting; movable connection methods include, but are not limited to, sliding connection, rotating connection and threaded connection. The connection method to achieve the desired effect should be selected according to the application of the solution.

[0034] In summary, the power systems, including but not limited to screw feeders, fans, and air distributors, as well as the transmission systems output by their respective power systems, are equipped with protective covers according to their actual installation locations to prevent wear or damage to the power systems and transmission systems caused by the external environment, thereby further ensuring the normal operation of the power systems and transmission systems.

[0035] In summary, the electronic or electrical components, including but not limited to screw feeders, fans, and air distributors, are existing components that were custom-made or purchased. The electrical connections between these components are conventional circuit or electrical connections in the prior art, and the power for each component is provided by an external power source. Therefore, they are not within the scope of protection of this utility model.

[0036] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. A biomass combustion thermal oil boiler for high-temperature pyrolysis waste gas, comprising a heat exchange chamber, a combustion chamber, a gas pyrolysis device, thermal oil coils, and a fuel conveying device; the heat exchange chamber is fixedly connected above the combustion chamber, and has a flue gas outlet II at the top and a feed inlet at the bottom; the thermal oil coils are disposed inside the heat exchange chamber, and the gas pyrolysis device passes through the thermal oil coils and connects to both sides of the heat exchange chamber; the fuel conveying device is supported and fixed to one side of the heat exchange chamber by a bracket, and the bottom of the fuel conveying device is fixedly connected to the feed inlet; characterized in that The combustion chamber is provided with a slag removal port on one side and a clean air oxygen supply port on the other side, and the grate is fixedly connected to the inside of the combustion chamber; The gas pyrolysis device includes an inlet gas collection box, an inlet pipe I, an outlet pipe, an outlet gas collection box, an exhaust port, an inlet pipe II, a connecting pipe I, a connecting pipe II, and a connecting pipe III. The inlet gas collection box is located on one side of the heat exchange chamber, with one end of the inlet pipe I fixedly connected to the top of the inlet gas collection box, and several outlet pipes are provided on one side of the inlet gas collection box. The outlet gas collection box is located on the other side of the heat exchange chamber, with several inlet pipes II provided on one side of the outlet gas collection box, and one end of the exhaust port is fixedly connected to the other side of the outlet gas collection box, while the other end is fixedly connected to a fan. The connecting pipes I, II, and III are arranged sequentially inside the heat exchange chamber, and both ends of the connecting pipes I, II, and III pass through through holes on both sides of the heat exchange chamber and are fixedly connected to the outlet pipe and the inlet pipe II, respectively.

2. The biomass combustion thermal oil boiler for high-temperature pyrolysis waste gas according to claim 1, characterized in that... The combustion chamber is equipped with a burner.

3. A biomass combustion thermal oil boiler for high-temperature pyrolysis waste gas according to claim 1, characterized in that... The heat transfer oil coil is fixedly connected to the heat exchange chamber through several connecting plates, and the oil inlet of the heat transfer oil coil is fixedly connected to the bottom of the heat exchange chamber, while the oil outlet of the heat transfer oil coil is fixedly connected to the top of the heat exchange chamber.

4. A biomass combustion thermal oil boiler for high-temperature pyrolysis waste gas according to claim 3, characterized in that... The heat transfer oil coil is a double-layer heat transfer oil coil, and the heat transfer oil coil is arranged around connecting pipe I, connecting pipe II, and connecting pipe III; the oil inlet is connected to the outlet of the hot oil pump through a pipe, and the oil outlet is connected to the inlet of the hot oil pump through a pipe.

5. A biomass combustion thermal oil boiler for high-temperature pyrolysis waste gas according to claim 1, characterized in that... The fuel conveying device includes a screw feeder, a hopper, and a blower; the hopper is fixedly connected to the top of the support, the screw feeder is fixedly connected to the bottom of the hopper, and the screw feeder is fixedly connected to the feed inlet through a pipe; the blower is fixedly connected to one side of the support through a connecting seat, and the air outlet of the blower is fixedly connected to one end of the screw feeder.

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