Methanol decomposition device for spheroidizing annealing furnace

Abstract

This utility model belongs to the technical field of annealing furnaces, and particularly relates to a methanol decomposition device for a spheroidizing annealing furnace. It includes a furnace body and a heat insulation plate. An oil pressure swing adsorption device is connected to the outside of the furnace body. A feed inlet is provided on the furnace body, connected to a methanol delivery pipe. A honeycomb plate is rotatably connected inside the furnace body, with a catalyst placed on the honeycomb plate. An annular groove is formed on the outer peripheral wall of the honeycomb plate, and several equidistantly arranged ball bearings are rotatably connected within the annular groove. A sliding groove is formed on the inner wall of the furnace body corresponding to the honeycomb plate, with the other part of the ball bearings embedded in the sliding groove. Several spiral guide fins are arranged around the outer peripheral wall of the furnace body, with channels between the spiral guide fins for the methanol delivery pipe to wind around. A toothed protrusion is formed around the lower end face of the honeycomb plate, and mounting holes are formed on the furnace body corresponding to the toothed protrusions, connected to a rotary motor. Compared with the prior art, this utility model effectively improves methanol decomposition efficiency and catalyst utilization, while reducing energy consumption and maintenance costs.

Description

Technical Field

[0001] This utility model relates to the field of annealing furnace technology, and more specifically, to a methanol decomposition device for a spheroidizing annealing furnace. Background Technology

[0002] In the spheroidizing annealing process of materials such as bearing steel and tool steel, a protective gas must be continuously introduced to prevent workpiece oxidation. The H2 / CO mixture (ratio of approximately 2:1) produced by methanol cracking is an ideal source of protective gas due to its high reducing power and non-coking properties.

[0003] For example, the methanol decomposition furnace for auxiliary use in spheroidizing annealing furnace disclosed in patent announcement number CN209406292 U, involves pouring methanol into a methanol inlet, vaporizing the methanol through a vaporization device, heating it through a heating tube, observing the temperature inside the furnace through a temperature control panel, performing vapor-liquid separation through a pressure swing adsorption device, and extracting hydrogen through a fan and delivering it to the annealing furnace through the annealing furnace interface to form a protective atmosphere, thereby improving working efficiency.

[0004] In the above process, the high-temperature gas generated by the cracking reaction is directly cooled by a cooling device, resulting in a significant amount of sensible heat being wasted by the cooling water. Simultaneously, the vaporization of liquid methanol requires continuous energy consumption from the heating elements. Furthermore, the furnace body is a fully enclosed welded structure with only a catalyst inlet and no dedicated maintenance outlet or removable module. When the catalyst fails due to sintering and caking, it cannot be completely removed. The furnace must be shut down for cooling before being cut and disassembled, incurring not only high cutting and welding costs and material expenses but also significant production losses. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a methanol decomposition device for a spheroidizing annealing furnace that is more energy-efficient.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A methanol decomposition device for a spheroidizing annealing furnace includes a furnace body and a heat insulation plate. An oil pressure swing adsorption device is connected to the outside of the furnace body. A feed inlet is provided on the furnace body and connected to a methanol delivery pipe. A honeycomb plate is rotatably connected inside the furnace body, and a catalyst is placed on the honeycomb plate.

[0008] The outer peripheral wall of the honeycomb panel has an annular groove, within which several equally spaced ball bearings are rotatably connected. The inner wall of the furnace body has a sliding groove corresponding to the honeycomb panel, with the other part of the ball bearings embedded in the sliding groove, and the ball bearings and the sliding groove being rotatably connected.

[0009] The outer perimeter of the furnace body is surrounded by several spiral guide fins, and channels are provided between the spiral guide fins for the methanol delivery pipe to be wound around.

[0010] The lower end face of the honeycomb panel is provided with protruding teeth. The furnace body is provided with mounting holes corresponding to the positions of the protruding teeth. A rotary motor is connected to the mounting holes. The output end of the rotary motor is placed in the mounting holes. The output end of the rotary motor is provided with a gear that meshes with the protruding teeth so that the rotary motor can rotate and drive the honeycomb panel to rotate.

[0011] The present invention is further configured such that: a through air inlet is provided on the inner wall of the furnace body, the air inlet is located below the honeycomb plate, the air inlet is connected to an air inlet pipe, and a blower is connected to the outside of the air inlet pipe.

[0012] The present invention is further configured such that: a mounting frame is provided on the outer wall of the furnace body, and the rotary motor is fixedly connected to the mounting frame.

[0013] The present invention is further configured such that the honeycomb plate, ball bearings and gears are made of high-temperature resistant materials.

[0014] The present invention is further configured such that: the upper surface of the honeycomb plate is provided with uniformly distributed catalyst fixing grooves.

[0015] Compared with the shortcomings of the prior art, the beneficial effects of this utility model are as follows:

[0016] A rotating motor drives gears that mesh with the convex teeth at the lower end of the honeycomb plate, allowing the honeycomb plate to rotate smoothly with the cooperation of ball bearings and sliding grooves, ensuring full contact and reaction between the catalyst and methanol. The spiral guide fins on the outer periphery of the furnace extend the heating path of the methanol delivery pipe, improving methanol preheating. The air inlet, combined with a blower, evenly distributes air downwards from the honeycomb plate, promoting the flow of decomposition gases. The honeycomb plate, ball bearings, and gears, made of high-temperature resistant materials, ensure stable operation of the device in high-temperature environments. The catalyst fixing grooves on the honeycomb plate prevent catalyst displacement, ensuring reaction uniformity. The overall structure is simple and reliable, effectively improving methanol decomposition efficiency and catalyst utilization while reducing energy consumption and maintenance costs. The blower prevents upward scavenging and carbon deposition. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the honeycomb panel structure according to an embodiment of the present invention.

[0019] Furnace body 1, feed inlet 2, honeycomb plate 3, annular groove 4, ball bearing 5, guide fins 6, convex teeth 7, air inlet 8, rotary motor 9, gear 10, catalyst fixing groove 11. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., 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 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. Therefore, they should not be construed as limitations on this utility model.

[0022] Working principle: First, liquid methanol is fed into the furnace body 1 through the methanol delivery pipe. The methanol is preheated and vaporized as it flows through the channel wound between the spiral guide fins 6. The rotary motor 9 is started to drive the gear 10 to rotate. The gear 10 meshes with the convex teeth 7 at the lower end of the honeycomb plate 3, causing the honeycomb plate 3 to rotate smoothly in the slide groove through the ball bearings 5. The catalyst placed on the honeycomb plate 3 rotates accordingly. At the same time, the blower delivers nitrogen gas to the bottom of the honeycomb plate 3 through the air inlet pipe and air inlet 8. The vaporized methanol comes into full contact with the rotating catalyst and undergoes a decomposition reaction. The gas produced by the reaction enters the external oil pressure swing adsorption device for treatment through the air outlet at the top of the furnace body 1. Throughout the process, the heat insulation plate can effectively reduce heat loss. The honeycomb plate 3, ball bearings 5 ​​and gear 10 made of high-temperature resistant material ensure that the device operates continuously and stably in a high-temperature environment. The catalyst fixing groove 11 keeps the catalyst evenly distributed, ultimately achieving efficient decomposition of methanol.

[0023] like Figures 1 to 2 As shown,

[0024] First, the honeycomb plate 3 is installed in the slide groove inside the furnace body 1 by the ball bearings 5 ​​to ensure that the honeycomb plate 3 can rotate smoothly. Catalyst particles are evenly placed on the upper surface of the honeycomb plate 3. The catalyst particles will be embedded in the pre-set catalyst fixing groove 11 of the honeycomb plate 3 to prevent displacement. The methanol conveying pipe is tightly wound around the outer wall of the furnace body 1 according to the channel direction between the spiral guide fins 6, and the feed port 2 is connected. The rotary motor 9 is fixed to the outer wall of the furnace body 1 by the mounting bracket, and the gear 10 is adjusted to fully mesh with the convex tooth 7 at the lower end of the honeycomb plate 3.

[0025] Connect the air inlet pipe to the air inlet hole 8 at the bottom of the furnace body 1, and connect the other end of the air inlet pipe to the blower; finally, connect the air outlet at the top of the furnace body 1 to the oil pressure swing adsorption device. In operation, first start the rotary motor 9, which drives the honeycomb plate 3 to rotate at a constant speed of 5-10 revolutions per minute via the gear 10. At this time, the catalyst forms a uniformly distributed dynamic catalytic layer on the honeycomb plate 3. Next, start the blower, which delivers nitrogen gas to the bottom of the honeycomb plate 3 through the air inlet hole 8 at a wind speed of 0.5-1 m / s. Then, open the methanol delivery pipe valve, and liquid methanol enters the delivery pipe at a flow rate of 100-200 ml per minute. As it flows through the channels between the spiral guide fins 6, it is preheated to a vaporized state of 80-120°C by the heat radiated from the furnace body 1. The gaseous methanol enters the interior of the furnace body 1 through the feed inlet 2 and comes into contact with the rotating catalyst above the honeycomb plate 3.

[0026] During the reaction, the heat insulation plate effectively blocks heat transfer to the upper part of the furnace body 1, concentrating the heat in the honeycomb plate 3 area; after the mixed gas rises to the upper part of the furnace body 1, it enters the oil pressure swing adsorption device through the gas outlet for separation and purification; throughout the entire operation, the honeycomb plate 3, ball bearings 5, and gear 10, made of high-temperature resistant alloy material, can withstand temperatures above 800℃ without deformation, ensuring long-term stable operation of the device; the spiral guide fins with a spiral angle design of 630-45 degrees ensure that the methanol delivery pipe has sufficient heating length without causing excessive bending of the pipeline; the stirring intensity of the catalyst can be controlled by adjusting the speed of the rotary motor 9, and the airflow of the blower can be optimized to optimize the flow state of the reaction gas.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any ordinary changes and substitutions made by those skilled in the art within the scope of the technical solution of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A methanol decomposition device for a spheroidizing annealing furnace, comprising a furnace body (1) and a heat insulation plate, wherein an oil pressure swing adsorption device is connected to the outside of the furnace body (1), and a feed inlet (2) is provided on the furnace body (1), and a methanol conveying pipe is connected to the feed inlet (2), characterized in that: A honeycomb plate (3) is rotatably connected inside the furnace body (1), and the catalyst is placed on the honeycomb plate (3). The outer peripheral wall of the honeycomb panel (3) is provided with an annular groove (4), and a number of equally spaced ball bearings (5) are rotatably connected in the annular groove (4). The inner wall of the furnace body (1) is provided with a sliding groove corresponding to the honeycomb panel (3). The other part of the ball bearings (5) is embedded in the sliding groove, and the ball bearings (5) are rotatably connected to the sliding groove. The outer peripheral wall of the furnace body (1) is surrounded by several spiral guide fins (6), and channels for winding the methanol delivery pipe are provided between the spiral guide fins (6). The lower end face of the honeycomb panel (3) is provided with protruding teeth (7). The furnace body (1) is provided with mounting holes corresponding to the protruding teeth (7). The mounting holes are connected to a rotary motor (9). The output end of the rotary motor (9) is placed in the mounting hole. The output end of the rotary motor (9) is provided with a gear (10) that meshes with the protruding teeth (7) so that the rotary motor (9) can rotate and drive the honeycomb panel (3) to rotate.

2. The methanol decomposition device for a spheroidizing annealing furnace according to claim 1, characterized in that: The inner wall of the furnace body (1) is provided with a through air inlet (8), which is located below the honeycomb plate (3). The air inlet (8) is connected to an air inlet pipe, and a blower is connected to the outside of the air inlet pipe.

3. The methanol decomposition device for a spheroidizing annealing furnace according to claim 1, characterized in that: The furnace body (1) has an installation frame on its outer wall, and the rotary motor (9) is fixedly connected to the installation frame.

4. The methanol decomposition device for a spheroidizing annealing furnace according to claim 1, characterized in that: The honeycomb panel (3), ball bearings (5) and gears (10) are made of high-temperature resistant materials.

5. The methanol decomposition device for a spheroidizing annealing furnace according to claim 1, characterized in that: The upper surface of the honeycomb plate (3) is provided with uniformly distributed catalyst fixing grooves (11).

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