Catalytic debinding furnace structure capable of saving inert gas consumption

Abstract

The utility model provides a catalytic debinding furnace structure capable of saving inert gas consumption, which relates to the technical field of industrial equipment and comprises a control cabinet and an acid conveying device, a reaction furnace is arranged on one side of the acid conveying device, an oxalic acid gasification box is arranged at the bottom of the acid conveying device, and an oxalic acid steam conveying pipeline is fixed on the upper portion of the gasification box. By adopting a mode of installing an active airflow pipeline, the problem that oxalic acid in an oxalic acid gasification box cannot be quickly conveyed into a reaction furnace under the nitrogen-free or micro-nitrogen condition in the degreasing process is solved, an inert gas plays a role in conveying oxalic acid catalyst gas, gaseous oxalic acid is conveyed into a furnace body to participate in a catalytic degreasing reaction, and the service life of the reaction furnace is prolonged. If the amount of nitrogen in the stage is relatively low, the gasified oxalic acid can be self-decomposed in a high-temperature state in a volatilization chamber due to slow airflow conveying, the oxalic acid is self-decomposed into carbon dioxide, carbon monoxide and water in the high-temperature state, the amount of oxalic acid participating in catalytic degreasing is reduced, and the degreasing rate is also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial equipment, in particular to a catalytic degreasing furnace structure capable of saving inert gas consumption. Background Art

[0002] Catalytic degreasing furnace is a kind of equipment used for degreasing products in metal powder injection molding (MIM) technology. Its principle is to use oxalic acid / nitric acid as a catalyst and depolymerize the organic carrier molecule polyformaldehyde into smaller volatile formaldehyde gas molecules at a specific temperature. These formaldehyde gases can gradually emit from the inside of the embryo, thereby achieving the purpose of product degreasing.

[0003] The oxalic acid catalytic degreasing furnace on the market is now completely superior to the nitric acid catalytic degreasing furnace in terms of environmental protection and degreasing efficiency. The principle of the oxalic acid catalytic degreasing furnace is to quantitatively transport solid oxalic acid to a high-temperature volatilization box, and then vaporize it into gaseous oxalic acid under the high temperature conditions of the volatilization box. In addition, the oxalic acid delivery device (patent number: 202220859301.X) is also equipped with an inert gas inlet, the purpose of which is to transport the vaporized oxalic acid to the inside of the furnace through inert gas, thereby catalyzing the degreasing reaction. When the oxalic acid catalyst reacts with the polyformaldehyde in the product in the furnace, the polyformaldehyde decomposes to produce a large amount of formaldehyde gas and emits it from the inside of the product. The explosion limit of formaldehyde is 7~73%. Therefore, when the formaldehyde gas reaches a certain concentration, if there is air in the furnace, if the formaldehyde and air are mixed, there will be a risk of combustion and explosion.

[0004] In the prior art, in order to prevent air from remaining in the furnace when the equipment enters the degreasing stage, an inert gas flushing is generally performed for a period of time before degreasing, and the air in the furnace is diluted with the inert gas until the air content in the furnace is far below the explosion value of formaldehyde (nitrogen is generally used as a protective gas for catalytic degreasing). In addition, the inert gas also plays the role of transporting oxalic acid catalyst gas. When solid oxalic acid is transported to the volatilization chamber, the solid oxalic acid is converted into gaseous oxalic acid at high temperature. The gaseous oxalic acid is transported into the furnace body with the nitrogen gas flow to participate in the catalytic degreasing reaction. If the amount of nitrogen at this stage is relatively low, the vaporized oxalic acid will not be transported into the furnace body in time due to the slow airflow. The high temperature in the volatilization chamber will cause the gaseous oxalic acid to self-decompose (oxalic acid begins to sublime at 100°C, sublimates rapidly at 125°C, sublimates in large quantities at 157°C, and begins to decompose). Oxalic acid self-decomposes into carbon dioxide, carbon monoxide and water under high temperature. The amount of oxalic acid involved in catalytic degreasing is reduced, and the relative degreasing rate will also be lower, resulting in reduced production efficiency, increased demand for oxalic acid, and increased production costs. Summary of the invention

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a catalytic degreasing furnace structure which can save the consumption of inert gas.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a catalytic degreasing furnace structure that saves inert gas consumption, including a control cabinet and an acid delivery device, a reaction furnace is arranged on one side of the acid delivery device, an oxalic acid gasification box is arranged at the bottom of the acid delivery device, an oxalic acid vapor delivery pipeline is fixed to the top of the oxalic acid gasification box, one end of the oxalic acid vapor delivery pipeline is fixed to the surface of the reaction furnace, an air flow baffle is fixed to the inner wall of the reaction furnace, a furnace circulation fan blade is rotatably connected to the inner wall of the reaction furnace, one end of the furnace circulation fan blade is keyed to a motor, a furnace connection pipeline is fixed to the peripheral surface of the reaction furnace, and an active The airflow pipeline, one end of which is fixed to the top of the oxalic acid gasification box. In the prior art, in order to prevent air from remaining in the furnace when the equipment enters the degreasing stage, an inert gas flushing is generally performed for a period of time before degreasing, and the air in the furnace is diluted with inert gas until the air content in the furnace is far below the explosion value of formaldehyde. In addition, the inert gas also plays a role in transporting oxalic acid catalyst gas. When solid oxalic acid is transported to the volatilization chamber, the solid oxalic acid is converted into gaseous oxalic acid at high temperature. The gaseous oxalic acid is transported into the furnace body with the nitrogen gas flow to participate in the catalytic degreasing reaction. If the amount of nitrogen at this stage is relatively low, Then the vaporized oxalic acid cannot be transported into the furnace body in time due to the slow conveying airflow, and the high temperature state in the volatilization chamber will cause the gaseous oxalic acid to self-decompose. Oxalic acid self-decomposes into carbon dioxide, carbon monoxide and water under high temperature. Then the amount of oxalic acid participating in catalytic degreasing is reduced, and the relative degreasing rate will also become lower, resulting in reduced production efficiency, increased demand for oxalic acid, and increased production costs. To solve this problem, the utility model adopts the method of installing active airflow ducts to achieve a solution, so that when the equipment is running, the motor drives the circulating fan blades in the furnace, so that the circulating fan in the furnace is always in a rotating state during production. Driven by the circulating fan blades in the furnace, the gas in the furnace is sucked to the center of the circulating fan blades in the furnace, and then the airflow is transported to both sides. The transport airflow trajectory shown in the figure is the airflow path. An airflow baffle is arranged on the right side of the inner wall of the reactor. Under the influence of the airflow baffle, a part of the airflow in the reactor will flow through the oxalic acid gasification box of the acid delivery device along the active airflow pipeline. At this time, the vaporized oxalic acid in the volatilization chamber will be transported into the furnace body by these airflows along the gasified oxalic acid trajectory. In this way, the vaporized oxalic acid can be smoothly brought into the furnace cavity for catalytic degreasing reaction, thereby reducing production costs and improving production efficiency.

[0007] Preferably, a circular array of combing air slices are fixed on the circumferential surface of the inner wall of the reactor, and a linear array of combing air holes are opened on the surface of the combing air slices. In the prior art, the airflow pattern in the reactor is not necessarily orderly. In particular, when there is a density difference in the internal airflow and the uniformity of air distribution is poor, turbulence and dead zones are prone to occur in the airflow in the reactor, resulting in unstable air flow and discontinuities. To address such problems, the utility model solves them by installing combing air slices. When the airflow in the reactor forms a trajectory, the combing air slices can increase the contact area between the airflow and the combing air slices through the arrangement of the circular array of combing air holes, thereby improving the uniformity of gas distribution and operating efficiency, thereby achieving the effect of increasing the reaction speed.

[0008] Preferably, thermal insulation cotton is fixed on the circumferential surface of the oxalic acid vapor conveying pipeline, and a heater is provided on the surface of the oxalic acid vapor conveying pipeline. In the prior art, since the oxalic acid vapor conveying pipeline is made of metal, when the oxalic acid vapor suddenly contacts the metal material with good thermal conductivity, it will cause condensation or reduced activity. At the same time, heat is lost due to the temperature difference between the pipeline and the surrounding environment, making the oxalic acid vapor temperature unstable, resulting in reduced reaction efficiency. To solve such problems, the utility model adopts the method of installing thermal insulation cotton to achieve the solution, so that the thermal insulation cotton can effectively isolate the low temperature influence of the external environment, maintain the temperature of the oxalic acid vapor in the pipeline, and prevent it from condensing or reducing its activity. At the same time, during the transportation process, the oxalic acid vapor will lose heat due to the temperature difference between the pipeline and the surrounding environment. The addition of thermal insulation cotton can reduce this heat loss, ensure the temperature stability of the oxalic acid vapor, thereby improving the efficiency and effect of catalytic degreasing, thereby achieving the effect of improving the efficiency of catalytic degreasing.

[0009] Preferably, a joint pad is fixed at one end of the furnace connecting pipe, and a joint pad is fixed at one end of the active airflow pipe, and a plurality of the joint pads are fixed by bolts. In the prior art, when the two pipes are connected, the setting of multiple motors causes inevitable vibration of the equipment, resulting in collision between the pipes. When used for a long time, the pipes are broken and damaged, which reduces the service life of the equipment. To solve such problems, the utility model adopts the method of installing joint pads to solve them. By setting the joint pads, the contact area between the pipes is greatly increased, the friction between the two is improved, and at the same time a larger fixing area is given to the bolts to prevent deformation and damage of the equipment, thereby achieving the effect of increasing the service life of the equipment.

[0010] Preferably, a bearing plate is fixed to the circumferential surface of the reactor, the inner wall of the bearing plate is provided with reinforcing ribs, an oblique bearing piece is fixed to one side of the bearing plate, and an I-beam is fixed to the bottom of the oblique bearing piece by bolts. Through the coordinated support of the bearing plate and the I-beam, greater rigid support is given to the equipment, thereby increasing the vibration resistance threshold, increasing the upper limit of equipment production, and the reinforcing ribs prevent the bearing plate from deformation, thereby increasing the service life of the equipment and increasing the scope of application of the equipment.

[0011] Preferably, a stabilizing triangle is fixed at the bottom of the oblique carrier, and one side of the stabilizing triangle is fixed to one side of the I-beam. The stabilizing triangle provides a stable triangular fixing structure for the oblique carrier and the I-beam, so that the two components are vibrationally linked, while preventing the I-beam from bending outward, thereby improving the stability of the equipment.

[0012] Preferably, a circular array of cotton gaps is provided on the inner wall of the thermal insulation cotton. The cotton gaps on the thermal insulation cotton can leave space for thermal expansion of the pipeline, thereby avoiding rupture of the insulation layer or damage to the pipeline due to insufficient space, thereby improving equipment stability.

[0013] Preferably, a node window is opened on the peripheral surface of the thermal insulation cotton, and the node window is for the convenience of installing a temperature sensor or other monitoring equipment, which is used to monitor the temperature, pressure and other parameters of the medium in the pipeline to ensure the normal operation of the system and facilitate the subsequent maintenance of the equipment.

[0014] Preferably, an inner ring groove is opened on one side of the joint pad, and sealant is applied to the inner wall of the inner ring groove. The sealing performance of the pipe fitting is improved by adding the sealant, and the precision of the equipment is improved.

[0015] Preferably, an additional panel is fixed to the bottom of the I-beam to prevent the bottom of the I-beam from scratching the ground, while increasing friction to prevent the equipment from slipping. Beneficial Effects

[0016] 1. In the prior art, in order to prevent air from remaining in the furnace when the equipment enters the degreasing stage, an inert gas flushing is generally performed for a period of time before degreasing, and the inert gas is used to dilute the air in the furnace until the air content in the furnace is far below the explosion value of formaldehyde. In addition, the inert gas also plays the role of transporting oxalic acid catalyst gas. When solid oxalic acid is transported to the volatilization chamber, the solid oxalic acid is converted into gaseous oxalic acid at high temperature. The gaseous oxalic acid is transported to the furnace body with the nitrogen gas flow to participate in the catalytic degreasing reaction. If the nitrogen amount at this stage is relatively low, the vaporized oxalic acid will not be transported to the furnace body in time due to the slow conveying gas flow. The high temperature state in the volatilization chamber will cause the gaseous oxalic acid to self-decompose. Oxalic acid self-decomposes into carbon dioxide, carbon monoxide and water under high temperature. Then the amount of oxalic acid participating in the catalytic degreasing is reduced, and the relative degreasing rate will also become lower, resulting in production. The efficiency is reduced, the demand for oxalic acid is increased, and the production cost is increased. In order to solve such problems, the utility model adopts the method of installing active airflow ducts to achieve the solution. When the equipment is running, the motor drives the circulating fan blades in the furnace, so that the circulating fan in the furnace is always in a rotating state during production. Driven by the circulating fan blades in the furnace, the gas in the furnace is sucked to the center of the circulating fan blades in the furnace, and then the air flow is transported to both sides. The conveying air flow trajectory shown in the figure is the airflow path. An airflow baffle is provided on the right side of the inner wall of the reactor. Under the influence of the airflow baffle, a part of the airflow in the reactor will flow through the oxalic acid gasification box of the acid delivery device along the active airflow duct. At this time, the vaporized oxalic acid in the volatilization chamber will be transported into the furnace body by these airflows along the gasified oxalic acid trajectory. In this way, the vaporized oxalic acid can be smoothly brought into the furnace cavity for catalytic degreasing reaction, thereby reducing production costs and improving production efficiency.

[0017] 2. In the prior art, the airflow pattern in the reactor is not necessarily orderly. In particular, when there is a density gap in the internal airflow and the uniformity of the air distribution is poor, turbulence and dead zones are prone to occur in the airflow in the reactor, resulting in unstable air flow and discontinuities. To address such problems, the utility model solves this problem by installing combing gas slices. When the airflow in the reactor forms a trajectory, the combing gas slices can increase the contact area between the airflow and the combing gas slices through the arrangement of a circular array of combing gas holes, thereby improving the uniformity of gas distribution and operating efficiency, thereby achieving the effect of increasing the reaction speed.

[0018] 3. In the prior art, since the oxalic acid vapor transmission pipeline is made of metal, when the oxalic acid vapor suddenly contacts the metal material with good thermal conductivity, it will cause condensation or reduced activity. At the same time, heat is lost due to the temperature difference between the pipeline and the surrounding environment, making the oxalic acid vapor temperature unstable, resulting in reduced reaction efficiency. To address this problem, the utility model solves it by installing thermal insulation cotton, which can effectively isolate the low temperature influence of the external environment, maintain the temperature of the oxalic acid vapor in the pipeline, and prevent it from condensing or reducing its activity. At the same time, during the transportation process, the oxalic acid vapor will lose heat due to the temperature difference between the pipeline and the surrounding environment. The addition of thermal insulation cotton can reduce this heat loss, ensure the temperature stability of the oxalic acid vapor, thereby improving the efficiency and effect of catalytic degreasing, thereby achieving the effect of improving the efficiency of catalytic degreasing.

[0019] 4. In the prior art, when two pipelines are connected, the setting of multiple motors causes inevitable vibration of the equipment, resulting in collision between the pipelines. When used for a long time, the pipelines are broken and damaged, which reduces the service life of the equipment. To solve this problem, the utility model adopts the method of installing joint pads to solve it. By setting the joint pads, the contact area between the pipelines is greatly increased, the friction between the two is improved, and at the same time a larger fixing area is given to the bolts to prevent deformation and damage of the equipment, thereby achieving the effect of increasing the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional structural schematic diagram of the utility model.

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the reactor of the utility model.

[0022] Figure 3 It is a three-dimensional structural schematic diagram of the control cabinet of the utility model.

[0023] Figure 4 It is a three-dimensional structural schematic diagram of the oxalic acid vapor delivery pipeline of the utility model.

[0024] Figure 5 It is a cross-sectional view from top to bottom of the utility model.

[0025] Figure 6 The utility model is a cross-sectional view from the front to the back.

[0026] Figure 7 It is a cross-sectional view from top to bottom of the reactor of the utility model.

[0027] Figure 8 It is a cross-sectional view of the comb gas distillation sheet of the utility model.

[0028] Fig. 9 It is a three-dimensional structural schematic diagram of the thermal insulation cotton of the utility model.

[0029] Fig.10 It is a three-dimensional structural schematic diagram of the stabilizing triangle member of the utility model.

[0030] Legend:

[0031] 1. Control cabinet; 101. Acid delivery device; 102. Reactor; 2. Oxalic acid gasification box; 201. Oxalic acid steam delivery pipeline; 202. Air flow baffle; 203. In-furnace circulation fan blade; 204. Active air flow pipeline; 205. Continuous furnace pipeline; 3. Combing gas distillation sheet; 301. Combing gas vent; 4. Insulation cotton; 401. Cotton value gap; 402. Section window; 5. Joint pad; 501. Inner ring groove; 6. Bearing plate; 601. Oblique bearing; 602. I-beam; 603. Stable triangle; 604. Added panel; α. Delivery air flow trajectory; β. Gasified oxalic acid trajectory; A. A area identification; B. B area identification; C. C area identification. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0033] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings. Specific embodiments

[0034] Reference Figure 1-10A catalytic degreasing furnace structure for saving inert gas consumption includes a control cabinet 1 and an acid delivery device 101, a reaction furnace 102 is arranged on one side of the acid delivery device 101, an oxalic acid gasification box 2 is arranged at the bottom of the acid delivery device 101, an oxalic acid vapor delivery pipeline 201 is fixed on the top of the oxalic acid gasification box 2, one end of the oxalic acid vapor delivery pipeline 201 is fixed to the surface of the reaction furnace 102, an air flow baffle 202 is fixed to the inner wall of the reaction furnace 102, a furnace circulation fan blade 203 is rotatably connected to the inner wall of the reaction furnace 102, one end of the furnace circulation fan blade 203 is keyed to a motor, a furnace connecting pipeline 205 is fixed to the peripheral surface of the reaction furnace 102, an active air flow pipeline 204 is fixed to one end of the furnace connecting pipeline 205, and the active air flow pipeline One end of 204 is fixed to the top of the oxalic acid gasification box 2. In order to prevent air from remaining in the furnace when the equipment enters the degreasing stage, an inert gas flushing is generally carried out for a period of time before degreasing, and the inert gas is used to dilute the air in the furnace until the air content in the furnace is far below the explosion value of formaldehyde. Catalytic degreasing generally uses nitrogen as a protective gas. In addition, the inert gas also plays the role of transporting oxalic acid catalyst gas. When solid oxalic acid is transported to the volatilization chamber, the solid oxalic acid is converted into gaseous oxalic acid at high temperature. The gaseous oxalic acid is transported into the furnace body with the nitrogen gas flow to participate in the catalytic degreasing reaction. If the nitrogen amount at this stage is relatively low, the gasified oxalic acid will be due to the slow conveying gas flow. Therefore, it cannot be transported into the furnace body in time. The high temperature state in the volatilization chamber will cause the gaseous oxalic acid to self-decompose. Oxalic acid begins to sublime at 100°C, sublimates rapidly at 125°C, and sublimates in large quantities at 157°C and begins to decompose. Oxalic acid self-decomposes into carbon dioxide, carbon monoxide and water under high temperature conditions. Then the amount of oxalic acid involved in catalytic degreasing is reduced, and the relative degreasing rate will also become lower, resulting in reduced production efficiency, increased demand for oxalic acid, and increased production costs. The problem is solved by installing an active airflow duct 204, which realizes that when the equipment is running, the motor drives the circulating fan blades 203 in the furnace, so that the circulating fan in the furnace is always in a rotating state during production, and the gas in the furnace is in the furnace. Driven by the internal circulation fan blades 203, the air is sucked into the center of the internal circulation fan blades 203 and then transported to both sides. The transport airflow trajectory α shown in the figure is the airflow path. An airflow baffle 202 is arranged on the right side of the inner wall of the reaction furnace 102. Under the influence of the airflow baffle 202, a part of the airflow in the reaction furnace 102 will flow through the oxalic acid gasification box 2 of the acid delivery device 101 along the active airflow pipeline 204. At this time, the vaporized oxalic acid in the volatilization chamber will be transported into the furnace body by these airflows along the gasification oxalic acid trajectory β. In this way, the vaporized oxalic acid can be smoothly brought into the furnace cavity for catalytic degreasing reaction, thereby reducing production costs and improving production efficiency.The reactor 102 has gas-combing slices 3 fixed on a circumferential array on the inner wall surface, and gas-combing holes 301 are provided in a linear array on the surface of the gas-combing slices 3. The airflow pattern in the reactor 102 is not necessarily orderly, especially when there is a density difference in the internal airflow and the uniformity of air distribution is poor, the airflow in the reactor 102 is prone to turbulence and dead zones, resulting in unstable air flow and discontinuities. This problem is solved by installing gas-combing slices 3. When the airflow in the reactor 102 forms a trajectory, the gas-combing slices 3 can increase the contact area between the airflow and the gas-combing slices 3 through the arrangement of the gas-combing holes 301 in a circumferential array, thereby improving the uniformity of gas distribution and the operating efficiency, thereby achieving the effect of increasing the reaction speed. A joint pad 5 is fixed at one end of the furnace pipe 205, and a joint pad 5 is fixed at one end of the active airflow pipe 204. Multiple joint pads 5 are fixed by bolts. When the two pipes are connected, the equipment inevitably vibrates due to the setting of multiple motors, resulting in collisions between the pipes. When used for a long time, the pipes are damaged and damaged, which reduces the service life of the equipment. The joint pad 5 is installed to solve the problem. The joint pad 5 is set to greatly increase the contact area between the pipes, increase the friction between the two, and give the bolts a larger fixing area to prevent deformation and damage of the equipment, thereby increasing the service life of the equipment. An inner ring groove 501 is opened on one side of the joint pad 5, and a sealant is applied to the inner wall of the inner ring groove 501. The sealing of the pipe fittings is improved by adding the sealant, and the precision of the equipment is improved.

[0035] The oxalic acid steam delivery pipeline 201 is fixed with insulation cotton 4 on its circumference, and a heater is provided on its surface. Since the oxalic acid steam delivery pipeline 201 is made of metal, when the oxalic acid steam suddenly contacts a metal material with good thermal conductivity, it will cause condensation or activity reduction. At the same time, due to the temperature difference between the pipeline and the surrounding environment, heat is lost, making the oxalic acid steam temperature unstable, resulting in reduced reaction efficiency. The solution is solved by installing insulation cotton 4, so that the insulation cotton 4 can effectively isolate the low temperature influence of the external environment, maintain the temperature of the oxalic acid steam in the pipeline, and prevent it from condensing or reducing its activity. At the same time, during the transportation process, the oxalic acid steam will lose heat due to the temperature difference between the pipeline and the surrounding environment. The addition of insulation cotton 4 can reduce this heat loss, ensure the temperature stability of oxalic acid steam, thereby improving the efficiency and effect of catalytic degreasing, and achieving the effect of improving the efficiency of catalytic degreasing. The circumferential array of the inner wall circumference of the insulation cotton 4 is provided with cotton gaps 401. The cotton gaps 401 on the insulation cotton 4 can leave space for the thermal expansion of the pipeline, avoid the insulation layer from breaking or the pipeline from being damaged due to insufficient space, and improve the stability of the equipment. The four sides of the thermal insulation cotton are provided with nodes 402, and the nodes 402 are for the convenience of installing temperature sensors or other monitoring equipment, which are used to monitor the temperature, pressure and other parameters of the medium in the pipeline to ensure the normal operation of the system and facilitate the later maintenance of the equipment.

[0036] The circumference of the reactor 102 is fixed with a bearing plate 6, and the inner wall of the bearing plate 6 is provided with reinforcing ribs. An oblique carrier 601 is fixed on one side of the bearing plate 6, and an I-beam 602 is fixed to the bottom of the oblique carrier 601 by bolts. The matching and support of the bearing plate 6 and the I-beam 602 provide greater rigid support for the equipment, thereby increasing the vibration resistance threshold and the upper limit of equipment production. The reinforcing ribs prevent the bearing plate 6 from deforming, thereby increasing the service life of the equipment and the scope of application of the equipment. A stable triangular member 603 is fixed to the bottom of the oblique carrier 601, and one side of the stable triangular member 603 is fixed to one side of the I-beam 602. The stable triangular member 603 provides a stable triangular fixed structure between the oblique carrier 601 and the I-beam 602, so that the two components are linked by vibration, and at the same time prevent the I-beam 602 from bending outward, thereby improving the stability of the equipment. An additional panel 604 is fixed to the bottom of the I-beam 602 to prevent the bottom of the I-beam 602 from scratching the ground, and at the same time increase the friction to prevent the equipment from slipping.

[0037] The working principle of the utility model is as follows: when the equipment is running, the motor drives the circulating fan blades 203 in the furnace, so that the circulating fan in the furnace is always in a rotating state during production. Driven by the circulating fan blades 203 in the furnace, the gas in the furnace is sucked to the center of the circulating fan blades 203 in the furnace, and then conveys the airflow to the surrounding areas on both sides. The conveying airflow trajectory α shown in the figure is the airflow path. An airflow baffle 202 is arranged on the right side of the inner wall of the reaction furnace 102. Under the influence of the airflow baffle 202, a part of the airflow in the reaction furnace 102 will flow through the oxalic acid gasification box 2 of the acid delivery device 101 along the active airflow pipeline 204. At this time, the vaporized oxalic acid in the volatilization chamber will be conveyed into the furnace body by these airflows along the gasification oxalic acid trajectory β path, so that the vaporized oxalic acid can be smoothly brought into the furnace cavity for catalytic degreasing reaction.

[0038] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0039] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A catalytic degreasing furnace structure for saving inert gas consumption, comprising a control cabinet (1) and an acid transport device (101), wherein a reaction furnace (102) is provided on one side of the acid transport device (101), characterized in that: An oxalic acid gasification box (2) is arranged at the bottom of the acid transport device (101); an oxalic acid vapor delivery pipeline (201) is fixed to the top of the oxalic acid gasification box (2); one end of the oxalic acid vapor delivery pipeline (201) is fixed to the surface of the reaction furnace (102); an air flow baffle (202) is fixed to the inner wall of the reaction furnace (102); an in-furnace circulation fan blade (203) is rotatably connected to the inner wall of the reaction furnace (102); one end of the in-furnace circulation fan blade (203) is keyed to a motor; a furnace connection pipeline (205) is fixed to the circumference of the reaction furnace (102); an active air flow pipeline (204) is fixed to one end of the in-furnace circulation pipeline (205); and one end of the active air flow pipeline (204) is fixed to the top of the oxalic acid gasification box (2).

2. A catalytic degreasing furnace structure for saving inert gas consumption according to claim 1, characterized in that: The inner wall surface of the reaction furnace (102) is fixed with gas combing slices (3) in a circular array, and the surface of the gas combing slices (3) is provided with gas combing vents (301) in a linear array.

3. A catalytic degreasing furnace structure for saving inert gas consumption according to claim 1, characterized in that: A heat-insulating cotton (4) is fixed to the peripheral surface of the oxalic acid steam delivery pipeline (201), and a heater is provided on the surface of the oxalic acid steam delivery pipeline (201).

4. A catalytic degreasing furnace structure for saving inert gas consumption according to claim 1, characterized in that: A closure pad (5) is fixed to one end of the furnace connection pipe (205), and a closure pad (5) is fixed to one end of the active airflow pipe (204), and a plurality of closure pads (5) are fixed by bolts.

5. A catalytic degreasing furnace structure for saving inert gas consumption according to claim 1, characterized in that: A bearing plate (6) is fixed to the circumferential surface of the reaction furnace (102), the inner wall of the bearing plate (6) is provided with reinforcing ribs, an oblique bearing member (601) is fixed to one side of the bearing plate (6), and an I-shaped support beam (602) is fixed to the bottom of the oblique bearing member (601) by bolts.

6. A catalytic degreasing furnace structure for saving inert gas consumption according to claim 5, characterized in that: A stabilizing triangle (603) is fixed to the bottom of the oblique carrier (601), and one side of the stabilizing triangle (603) is fixed to one side of the I-shaped support beam (602).

7. A catalytic degreasing furnace structure for saving inert gas consumption according to claim 3, characterized in that: The thermal insulation cotton (4) is provided with cotton gaps (401) in a circular array on the inner wall surface.

8. A catalytic degreasing furnace structure for saving inert gas consumption according to claim 3, characterized in that: A section window (402) is provided on the circumference of the thermal insulation cotton (4).

9. A catalytic degreasing furnace structure for saving inert gas consumption according to claim 4, characterized in that: An inner ring groove (501) is provided on one side of the joint connection pad (5), and a sealant is applied to the inner wall of the inner ring groove (501).

10. A catalytic degreasing furnace structure for saving inert gas consumption according to claim 5, characterized in that: An additional panel (604) is fixed to the bottom of the I-shaped support beam (602).

Images