Efficient catalytic pyrolysis furnace system

Abstract

The utility model discloses an efficient catalytic pyrolyzing furnace system which comprises a pyrolyzing furnace, a mixing assembly, a first gas conveying pipeline and a second gas conveying pipeline, the pyrolyzing furnace comprises a furnace body, a boiler barrel and a heat accumulator, an independent combustion chamber is arranged in the furnace body, and an airflow channel communicated with the combustion chamber is arranged in the furnace body; a first air inlet and a second air inlet which are communicated with the combustion chamber are formed in the lower portion of the boiler body, and the boiler barrel is arranged on the top of the boiler body and communicated with the airflow channel. The mixing assembly comprises a mixer and an input pipeline, one end of the input pipeline is connected with the outlet end of the mixer, and the other end of the input pipeline is connected with the feed port; one end of the first gas conveying pipeline is connected with the first gas inlet; one end of the second gas conveying pipeline is connected with the second gas inlet. Air, natural gas and steam are ingeniously injected into the combustion chamber, so that heat release in the furnace body can be kept stable under linkage matching adjustment of the steam and the natural gas, and meanwhile it is ensured that pollutants generated in the furnace body are controlled.

Description

Technical Field

[0001] The utility model relates to the technical field of catalytic pyrolysis, in particular to a high-efficiency catalytic pyrolysis furnace system. Background Art

[0002] Solid waste resource conversion refers to the process of converting domestic garbage, industrial waste and other wastes into reusable resources. Among them, solid waste resources can be burned in boilers as fuel to release heat. When solid waste resources are used as fuel for boiler combustion, they have the characteristics of high pollution, low calorific value and large calorific value fluctuation. However, when solid waste undergoes pyrolysis and oxidation combustion reactions in the boiler, the reaction temperature in the boiler will fluctuate with the calorific value of the solid waste fuel, resulting in lower reaction efficiency and higher pollution emissions. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a high-efficiency catalytic pyrolysis furnace system.

[0004] The present application embodiment provides a high-efficiency catalytic pyrolysis furnace system, comprising:

[0005] A pyrolysis furnace, comprising a furnace body, a boiler drum and a heat storage body arranged inside the furnace body, wherein an independent combustion chamber is arranged inside the furnace body, and an air flow channel connected to the combustion chamber is arranged inside the furnace body, the heat storage body is arranged in the combustion chamber, a feed port connected to the furnace body is arranged at the upper part of the furnace body, a first air inlet and a second air inlet connected to the combustion chamber are arranged at the lower part of the furnace body, and the boiler drum is arranged at the top of the furnace body and connected to the air flow channel;

[0006] A mixing assembly, comprising a mixer and an input pipeline, one end of the input pipeline is connected to the outlet end of the mixer, the other end of the input pipeline is connected to the feed port, and the mixer is used to mix the reactants to be pyrolyzed with steam;

[0007] a first gas pipeline, one end of which is connected to the first gas inlet, and the other end of which is used to be connected to an external combustible gas source to pass the combustible gas into the combustion chamber;

[0008] A second air supply pipeline has one end connected to the second air inlet, and the other end of the second air supply pipeline is used to connect to external air so as to pass air into the combustion chamber.

[0009] In one embodiment, the combustion chamber is disposed in the middle of the furnace body.

[0010] In one embodiment, heat conducting plates are arranged around the outer wall of the combustion chamber in sequence from top to bottom.

[0011] In one embodiment, it also includes a steam pipeline, a steam turbine and a generator, one end of the steam pipeline is connected to the air outlet end of the boiler drum, and the other end of the steam pipeline is connected to the steam turbine to pass the heated steam into the steam turbine. The generator is connected to the steam turbine so that the generator generates electricity under the drive of the steam turbine.

[0012] In one embodiment, a pressure regulating valve is further included, and the pressure regulating valve is arranged on the first gas supply pipeline to adjust the pressure of the combustible gas entering the combustion chamber.

[0013] In one embodiment, a flow controller is further included. The flow controller is arranged on the first gas pipeline and is located in front of the pressure regulating valve. The flow controller is used to adjust the flow of the combustible gas entering the combustion chamber.

[0014] In one embodiment, the lower portion of the furnace body is provided with a slag discharge channel, and the bottom of the furnace body is provided with a slag discharge port connected to the slag discharge channel.

[0015] In one embodiment, the diameter of the slag discharge channel gradually decreases from top to bottom.

[0016] In one embodiment, it also includes a heat exchanger and an exhaust pipeline, one end of the exhaust pipeline is connected to the smoke exhaust outlet of the furnace body, the other end of the exhaust pipeline is connected to the heat exchanger, the outlet end of the second gas pipeline is connected to the heat exchanger, and the heat exchanger is connected to the combustion chamber through an inlet pipeline.

[0017] Compared with the prior art, the high-efficiency catalytic pyrolysis furnace system provided in the embodiment of the present application has the following beneficial effects:

[0018] An independent combustion chamber is formed inside the furnace body, and then the combustible gas and air are introduced into the combustion chamber respectively through the first gas pipeline and the second gas pipeline. Under the action of the heat released by the heat storage body, the combustible gas and the air undergo a violent oxidation reaction, thereby releasing a large amount of heat during the reaction, so that the to-be-decomposed material entering the furnace body can undergo a decomposition reaction; at the same time, the generated heat can be used to heat the drum located at the top of the furnace body, so that the water in the drum is heated to generate steam, and the generated steam can be introduced into the mixer to preheat the pyrolysis reactants. Air, natural gas and steam are cleverly injected into the combustion chamber, so that under the coordinated adjustment of steam and natural gas, the heat release in the furnace body can be kept stable, while ensuring that the pollutants generated inside the furnace body are controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a structural schematic diagram of a high-efficiency catalytic pyrolysis furnace system of the present application;

[0020] Figure 2 It is a structural schematic diagram of a pyrolysis furnace in a high-efficiency catalytic pyrolysis furnace system of the present application.

[0021] Numbers in the figure:

[0022] 10. Pyrolysis furnace; 11. Furnace body; 11a. Combustion chamber; 12. Heat storage body; 13. Boiler drum; 14. Feed port; 15. First air inlet; 16. Second air inlet; 17. Air flow channel; 18. Slag outlet; 19. Slag channel; 20. Mixing assembly; 21. Mixer; 22. Input pipeline; 30. First gas pipeline; 40. Second gas pipeline; 50. Steam pipeline; 60. Steam turbine; 70. Generator; 80. Pressure regulating valve; 90. Flow controller; 100. Heat exchanger; 110. Exhaust pipeline. DETAILED DESCRIPTION

[0023] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0024] The following is a further detailed description of the specific implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0025] Please refer to Figure 1 and Figure 2 An embodiment of the present application provides a high-efficiency catalytic pyrolysis furnace 10 system, which includes a pyrolysis furnace 10, a mixing assembly 20, a first gas pipeline 30 and a second gas pipeline 40.

[0026] Specifically, the pyrolysis furnace 10 includes a furnace body 11, a boiler drum 13, and a heat storage body 12 disposed inside the furnace body 11. An independent combustion chamber 11a is disposed inside the furnace body 11, and an air flow channel 17 communicating with the combustion chamber 11a is disposed inside the furnace body 11. The heat storage body 12 is disposed inside the combustion chamber 11a. A feed port 14 communicating with the inside of the furnace body 11 is disposed at the upper portion of the furnace body 11. A first air inlet 15 and a second air inlet 16 communicating with the combustion chamber 11a are disposed at the lower portion of the furnace body 11. The boiler drum 13 is disposed at the top of the furnace body 11 and communicated with the air flow channel 17. The mixing assembly 20 includes a mixer 21 and an input pipeline 22. One end of the input pipeline 22 is connected to the outlet end of the mixer 21, and the other end of the input pipeline 22 is connected to the feed port 14. The mixer 21 is used to mix the reactants to be pyrolyzed with steam. One end of the first gas pipeline 30 is connected to the first gas inlet 15, and the other end of the first gas pipeline 30 is used to be connected to an external combustible gas source to pass the combustible gas into the combustion chamber 11a. One end of the second gas pipeline 40 is connected to the second gas inlet 16, and the other end of the second gas pipeline 40 is used to communicate with external air to pass air into the combustion chamber 11a.

[0027] Exemplarily, the heat storage body 12 is a material or device that can store heat energy and release heat energy when needed, so that the temperature inside the furnace body 11 can be adjusted by absorbing, storing and releasing heat. It should be noted that the heat storage body 12 can be made of graphite material or phase change material (such as heat storage wax, heat storage salt, etc.), which is not limited. The heat storage body 12 increases the energy density of the furnace body 11, makes the pyrolysis gas and air mix more evenly, and greatly reduces the smoke and tar that invade the drum 13.

[0028] Exemplarily, the mixer 21 is used to fully mix the reactants to be pyrolyzed with the generated steam, so as to preheat the reactants to be pyrolyzed before they are introduced into the furnace body 11, which is beneficial to accelerate the cracking reaction.

[0029] Exemplarily, the drum 13 is often used for steam-water separation and steam purification. A certain amount of water is stored in the drum 13, which has a certain amount of heat and working fluid storage. When the working conditions change, the speed of steam pressure change can be slowed down, and a certain buffering effect is played when the water supply and load are not coordinated for a short time. The drum 13 is equipped with internal devices to perform steam-water separation, steam cleaning, pot dosing, and continuous sewage discharge to ensure the quality of steam. In this embodiment, the drum 13 is arranged on the top of the furnace body 11, and the air flow channel 17 is connected to the drum 13, so that a large amount of heat generated after the reaction in the combustion chamber 11a is transmitted to the drum 13 through the air flow channel 17, and then the water in the drum 13 is heated to generate steam, so that the generated steam can enter the mixer 21 to preheat the reactants to be pyrolyzed, and the steam can also drive the steam turbine 60 to generate electricity.

[0030] For example, the combustible gas is introduced into the combustion chamber 11a by the first gas pipeline 30, and then the air is introduced into the combustion chamber 11a by the second gas pipeline 40, and under the action of the heat released by the heat storage body 12, the combustible gas and the air undergo a violent oxidation reaction, thereby releasing a large amount of heat during the reaction, so that the to-be-decomposed material entering the furnace body 11 can undergo a decomposition reaction. In addition, it should be noted that the combustible gas can be natural gas, but is not limited thereto.

[0031] The high-efficiency catalytic pyrolysis furnace 10 system based on the above technical features forms an independent combustion chamber 11a inside the furnace body 11, and then uses the first gas pipeline 30 and the second gas pipeline 40 to respectively pass the combustible gas and air into the combustion chamber 11a, and under the action of the heat released by the heat storage body 12, the combustible gas and the air undergo a violent oxidation reaction, thereby releasing a large amount of heat during the reaction, so that the to-be-decomposed material entering the furnace body 11 can undergo a decomposition reaction; at the same time, the generated heat can also be used to heat the drum 13 arranged on the top of the furnace body 11, so that the water in the drum 13 is heated to generate steam, so that the generated steam can be introduced into the mixer 21 to preheat the to-be-decomposed reactants. Air, natural gas and steam are cleverly injected into the combustion chamber 11a, so that under the coordinated adjustment of steam and natural gas, the heat release in the furnace body 11 can be kept stable, while ensuring that the pollutants generated inside the furnace body 11 are controlled.

[0032] In one embodiment, the combustion chamber 11a is arranged in the middle of the furnace body 11, and heat conducting plates are arranged around the outer wall of the combustion chamber 11a from top to bottom. In this way, the introduced cracked material can make a spiral motion around the outer wall of the combustion chamber 11a, and the heat conducted by the heat conducting plate can be used to heat the cracked material, thereby achieving efficient use of heat. In addition, it should be noted that the heat conducting plate can be connected to the outer wall of the combustion chamber in a spiral shape by an integrated molding method. The specific method of winding is common knowledge of those skilled in the art, and will not be described in detail.

[0033] In one embodiment, it also includes a steam pipeline 50, a steam turbine 60 and a generator 70. One end of the steam pipeline 50 is connected to the air outlet end of the boiler drum 13, and the other end of the steam pipeline 50 is connected to the steam turbine 60 to pass the heated steam into the steam turbine 60. The generator 70 is connected to the steam turbine 60 so that the generator 70 generates electricity under the drive of the steam turbine 60.

[0034] Exemplarily, part of the steam generated by heating the drum 13 is introduced into the steam turbine 60 via the steam pipeline 50, so that the steam turbine 60 is driven to expand and perform work to drive the generator 70 to generate electricity, thereby cleverly realizing energy recovery and avoiding energy waste.

[0035] In one embodiment, a pressure regulating valve 80 is further included. The pressure regulating valve is arranged on the first gas supply pipeline 30 and is used to adjust the pressure of the combustible gas entering the combustion chamber 11a.

[0036] In one embodiment, a flow controller 90 is further included. The flow controller 90 is arranged on the first gas pipeline 30 and is located in front of the pressure regulating valve. The flow controller 90 is used to adjust the flow of the combustible gas entering the combustion chamber 11a. In this way, the flow controller 90 can be used to control the flow of the combustible gas entering the combustion chamber 11a, and the pyrolysis temperature and reaction time can be controlled in real time according to demand.

[0037] In one embodiment, the lower part of the furnace body 11 has a slag discharge channel 19, and the bottom of the furnace body 11 is provided with a slag discharge port 18 connected to the slag discharge channel 19, and the diameter of the slag discharge channel 19 gradually decreases from top to bottom. In this way, the diameter of the slag discharge channel 19 is set to gradually decrease from top to bottom, which can speed up the slag discharge and avoid the problem of blockage.

[0038] In one embodiment, it also includes a heat exchanger 100 and an exhaust pipeline 110, one end of the exhaust pipeline 110 is connected to the smoke exhaust outlet of the furnace body 11, and the other end of the exhaust pipeline is connected to the heat exchanger 100, the gas outlet end of the second gas pipeline 40 is connected to the heat exchanger 100, and the heat exchanger 100 is connected to the combustion chamber 11a through an inlet pipeline.

[0039] Exemplarily, the flue gas generated by combustion is passed into the heat exchanger 100 through the exhaust pipe 110 to exchange heat with the air to be injected into the combustion chamber 11a, so that the heat carried by the flue gas can preheat the air to avoid energy waste.

[0040] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A high-efficiency catalytic pyrolysis furnace system, characterized in that: include: A pyrolysis furnace, comprising a furnace body, a boiler drum and a heat storage body, wherein an independent combustion chamber is arranged inside the furnace body, and an air flow channel connected to the combustion chamber is arranged inside the furnace body, the heat storage body is arranged in the combustion chamber, a feed port connected to the interior of the furnace body is arranged at the upper part of the furnace body, a first air inlet and a second air inlet connected to the combustion chamber are arranged at the lower part of the furnace body, and the boiler drum is arranged at the top of the furnace body and connected to the air flow channel; A mixing assembly, comprising a mixer and an input pipeline, one end of the input pipeline is connected to the outlet end of the mixer, the other end of the input pipeline is connected to the feed port, and the mixer is used to mix the reactants to be pyrolyzed with steam; a first gas pipeline, one end of which is connected to the first gas inlet, and the other end of which is used to be connected to an external combustible gas source to pass the combustible gas into the combustion chamber; A second air supply pipeline has one end connected to the second air inlet, and the other end of the second air supply pipeline is used to connect to external air so as to pass air into the combustion chamber.

2. The high-efficiency catalytic pyrolysis furnace system according to claim 1, characterized in that: The combustion chamber is arranged at a middle position inside the furnace body.

3. The high-efficiency catalytic pyrolysis furnace system according to claim 2, characterized in that: The outer wall of the combustion chamber is sequentially surrounded by heat conducting plates from top to bottom.

4. The high-efficiency catalytic pyrolysis furnace system according to claim 1, characterized in that: It also includes a steam pipeline, a steam turbine and a generator. One end of the steam pipeline is connected to the air outlet end of the boiler drum, and the other end of the steam pipeline is connected to the steam turbine so that the heated steam can be passed into the steam turbine. The generator is connected to the steam turbine so that the generator can generate electricity under the drive of the steam turbine.

5. The high-efficiency catalytic pyrolysis furnace system according to claim 1, characterized in that: It also includes a pressure regulating valve, which is arranged on the first gas pipeline and is used to adjust the pressure of the combustible gas entering the combustion chamber.

6. The high-efficiency catalytic pyrolysis furnace system according to claim 5, characterized in that: It also includes a flow controller, which is arranged on the first gas pipeline and located in front of the pressure regulating valve. The flow controller is used to adjust the flow of the combustible gas entering the combustion chamber.

7. The high-efficiency catalytic pyrolysis furnace system according to claim 1, characterized in that: The lower part of the furnace body is provided with a slag discharge channel, and the bottom of the furnace body is provided with a slag discharge port connected with the slag discharge channel.

8. The high-efficiency catalytic pyrolysis furnace system according to claim 7, characterized in that: The diameter of the slag discharge channel gradually decreases from top to bottom.

9. The high-efficiency catalytic pyrolysis furnace system according to claim 1, characterized in that: It also includes a heat exchanger and an exhaust pipeline, one end of the exhaust pipeline is connected to the smoke exhaust outlet of the furnace body, the other end of the exhaust pipeline is connected to the heat exchanger, the outlet end of the second gas pipeline is connected to the heat exchanger, and the heat exchanger is connected to the combustion chamber through an inlet pipeline.

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