Heating mechanism and oxidation reaction container for synthesizing formaldehyde

Abstract

The utility model discloses a heating mechanism and an oxidation reaction container used for synthesizing formaldehyde, the heating mechanism comprises a supporting assembly, a porcelain tube assembly and an electric heating assembly, the supporting assembly comprises a supporting ring, a plurality of first supporting pieces detachably arranged on the supporting ring and a second supporting piece used for supporting the first supporting pieces and connected to the supporting ring; the porcelain tube assembly comprises a plurality of porcelain tubes, each first supporting piece is sleeved with one porcelain tube, and each porcelain tube is composed of a plurality of sub-tubes; the electric heating assembly comprises a plurality of electric heating pieces, and the ceramic tube on each first supporting piece is wound with the corresponding electric heating piece. The supporting ring, the first supporting piece and the second supporting piece are not in contact with the electric heating piece. The heating mechanism is not prone to high-temperature deformation in the using process, the service life is greatly prolonged, even if part of components are damaged, the heating mechanism can be replaced independently, overall replacement is not needed, the using cost is greatly reduced, and the heating mechanism can be applied to an oxidation reaction container for synthesizing formaldehyde to serve as a heat supply assembly.

Description

Technical Field

[0001] The utility model relates to the field of silver method synthetic formaldehyde oxidation furnaces, and specifically relates to a heating mechanism and an oxidation reaction vessel for synthesizing formaldehyde. Background Art

[0002] Formaldehyde is an important basic organic chemical raw material, which is widely used in industries such as chemical engineering, medicine, pesticides, and light industry, and can produce more than 100 downstream products. The silver method production is one of the methods for producing formaldehyde. In this method, silver is used as a catalyst, and a mixture of methanol and air is used as a raw material. The catalytic oxidation reaction is carried out in a fixed-bed reactor to produce formaldehyde. However, this catalytic oxidation reaction needs to be carried out under heating conditions. However, the existing heating mechanism is prone to deformation at high temperatures during long-term use, resulting in uneven heat supply. As a result, the catalyst silver is prone to uneven heating, affecting the distribution state of silver in the reaction vessel, and aggregation may occur, reducing the contact area, thus causing the catalytic effect of silver to decline, shortening the service life of the silver catalyst, frequent shutdowns, and increasing production costs. At the same time, once some components of the existing heating mechanism are damaged or aged, the whole needs to be replaced, and the cost is relatively high. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide an improved heating mechanism. This heating mechanism is not prone to high-temperature deformation during use, and its service life is greatly extended. Moreover, even if some components are damaged, only the damaged components can be replaced separately, without the need to replace the whole, greatly reducing the use cost.

[0004] The utility model also provides an oxidation reaction vessel for synthesizing formaldehyde, which includes the above heating mechanism.

[0005] To achieve the above purpose, the utility model adopts the following technical solution:

[0006] A heating mechanism, the heating mechanism includes:

[0007] A support assembly, which includes a support ring, a first support member, and a second support member. There are multiple first support members arranged side by side. There is at least one second support member and it is used to support the first support member. The two ends of the first support member are respectively detachably arranged on the support ring, and the two ends of the second support member are respectively connected to the support ring;

[0008] A porcelain tube assembly, which includes multiple porcelain tubes. Each porcelain tube is sleeved on each first support member, and the porcelain tube is composed of multiple sub-tubes;

[0009] An electric heating assembly, which includes multiple electric heating elements. Each electric heating element is wound around the porcelain tube on each first support member;

[0010] The support ring, the first support member, and the second support member are respectively not in contact with the electric heating element.

[0011] In some embodiments of the present utility model, the materials of the support ring, the first support member, and the second support member are respectively stainless steel materials.

[0012] In some embodiments of the present utility model, the material of the electric heating element is copper.

[0013] According to some preferred aspects of the present utility model, the first support member includes a support body, a locking member, and locking rods respectively formed at both ends of the support body. Through holes for inserting the locking rods are formed on the support ring, and the locking member cooperates with the locking rods to lock the support body on the support ring.

[0014] Further, external threads and limit holes are formed on the locking rods. The locking member includes a first nut, a second nut, and a locking pin. The first nut and the second nut can respectively be screwed onto the locking rods, and the second nut can abut against the first nut. The locking pin can be inserted into the limit holes, and the locking pin is used to prevent the second nut from disengaging from the locking rod.

[0015] Even further, the locking pin is made of a heat-resistant material that can be bent. The locking pin includes a clamping head with a radial dimension larger than the limit hole, and a first clamping tail and a second clamping tail that can respectively pass through the limit hole. The locking pin includes an unlocked state and a locked state. When the locking pin is in the locked state, the first clamping tail and the second clamping tail are respectively bent to prevent the locking pin from disengaging from the limit hole; when the locking pin is in the unlocked state, the first clamping tail and the second clamping tail respectively extend along the axis of the limit hole and allow the locking pin to disengage from the limit hole.

[0016] In some embodiments of the present utility model, the extending direction of the first support member is perpendicular to the extending direction of the second support member.

[0017] In some embodiments of the present utility model, there are 2n second support members symmetrically arranged along the diameter of the support ring, where n is greater than or equal to 1.

[0018] In some embodiments of the present utility model, the multiple sub-tubes are closely butted to form the porcelain tube.

[0019] In some embodiments of the present utility model, the multiple first support members are equally spaced.

[0020] According to some preferred aspects of the present utility model, the support ring includes a support ring body and a hook connected to one end of the support ring body, and the hook has a hook groove with an opening facing downward.

[0021] Another technical solution provided by the present utility model: An oxidation reaction vessel for synthesizing formaldehyde, which includes a reactor body having a reaction cavity and a heating component disposed in the reaction cavity, and the heating component includes the heating mechanism described above.

[0022] Due to the application of the above technical solution, the present utility model has the following advantages compared with the prior art:

[0023] Based on the defects of the existing heating mechanism, such as being prone to high-temperature deformation resulting in uneven heat supply, and the need for overall replacement after some components are damaged or aged, the present utility model innovatively provides a heating mechanism with a new structure. The heating mechanism includes three-level supports, with the support ring as the foundation, and further combines two interacting support members to achieve the stability and firmness of the overall structure, and is not prone to high-temperature deformation. Then, by winding the electric heating element around the first support member through a porcelain tube, it is beneficial to the uniform distribution of the electric heating element and realizes uniform heat supply. In particular, by detachably arranging the first support member and the porcelain tube being composed of multiple sub-tubes, the flexibility of the structure and the ability to facilitate replacement are greatly improved. When some components are damaged, only the damaged parts can be replaced through the design of these structures, which greatly reduces the use cost. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1 It is a schematic structural diagram of the heating mechanism in the present utility model;

[0026] Figure 2 It is a schematic structural diagram of the cooperation between the first support member, the porcelain tube, and the electric heating element in the present utility model;

[0027] Figure 3 It is a schematic structural diagram of the end of the first support member in the present utility model;

[0028] Figure 4 It is a schematic structural diagram of one of the locking pins in the present utility model (in the locked state);

[0029] Figure 5This is the second structural schematic diagram of the locking nail in the present utility model (unlocked state);

[0030] Figure 6 This is a partial structural schematic diagram of the support ring in the present utility model;

[0031] Figure 7 It is Figure 6 The enlarged schematic diagram of part A in

[0032] In the attached drawing reference numerals: 1, support ring; 11, through hole; 12, support ring body; 13, hook; 131, hooking groove; 2, first support member; 21, support body; 22, locking member; 221, first nut; 222, second nut; 223, locking nail; 2231, clamping head; 2232, first clamping tail; 2233, second clamping tail; 23, locking rod; 231, external thread; 3, second support member; 4, porcelain tube; 41, sub-tube; 5, electric heating element. Detailed implementation manners

[0033] In order to make the above objects, features and advantages of the present utility model more obvious and understandable, the present utility model will be described in detail below in conjunction with the attached drawings and specific implementation manners. Many specific details are set forth in the following description in order to fully understand the present utility model. However, the present utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0034] In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0036] The preferred implementation manners of the present utility model will be described in detail below in conjunction with the attached drawings.

[0037] Such as Figures 1 to 7As shown, in this example, a heating mechanism is provided, which includes a support assembly, a porcelain tube assembly, and an electric heating assembly. Among them, the support assembly includes a support ring 1, a first support member 2, and a second support member 3. There are multiple first support members 2 arranged in parallel, and there is at least one second support member 3 for supporting the first support member 2. The two ends of the first support member 2 are respectively detachably arranged on the support ring 1, and the two ends of the second support member 3 are respectively connected to the support ring 1. The porcelain tube assembly includes multiple porcelain tubes 4, and each first support member 2 is sleeved with a porcelain tube 4, and the porcelain tube 4 is composed of multiple sub-tubes 41. The electric heating assembly includes multiple electric heating elements 5, and each electric heating element 5 is wound around the porcelain tube 4 on each first support member 2. The support ring 1, the first support member 2, and the second support member 3 are not in contact with the electric heating element 5 respectively.

[0038] In this example, the main functions of the porcelain tube are as follows: 1. Separate the electric heating element 5 from the support assembly, especially the first support member 2; 2. Also play a supporting role. Since the porcelain tube 4 is a rigid member, it is beneficial to support the electric heating element 5; 3. By using the porcelain tube 4 formed by multiple sub-tubes 41, for example, multiple sub-tubes 41 can be closely butted to form the porcelain tube 4, which does not affect other functions. Moreover, when the porcelain tube 4 is damaged in some areas during use, only the sub-tube 41 corresponding to the damaged area can be replaced, reducing the use cost. Of course, in this example, the electric heating assembly also includes components for power supply, but they can be set far away from the electric heating element, and preferably can realize power supply without being exposed to a high-temperature environment.

[0039] In some other embodiments, porcelain tubes can also be provided on the second support member.

[0040] Furthermore, the materials of the support ring 1, the first support member 2, and the second support member 3 are respectively stainless steel materials, and the material of the electric heating element 5 is copper. Stainless steel materials have good heat resistance, wide sources, and easy availability. Using copper as the material of the electric heating element 5 has good heat generation performance and long service life.

[0041] In this example, the first support member 2 includes a support body 21, a locking member 22, and locking rods 23 respectively formed at both ends of the support body 21. Through holes 11 for inserting the locking rods 23 are formed on the support ring 1, and the locking member 22 cooperates with the locking rods 23 to lock the support body 21 on the support ring 1. Further, external threads 231 and limit holes (not shown) are formed on the locking rods 23. The locking member 22 includes a first nut 221, a second nut 222, and a locking pin 223. The first nut 221 and the second nut 222 can be respectively screwed onto the locking rods 23, and the second nut 222 can abut against the first nut 221. The locking pin 223 can be inserted into the limit hole, and the locking pin 223 is used to prevent the second nut 222 from disengaging from the locking rods 23.

[0042] The locking pin 223 is made of a heat-resistant material that can be bent. The locking pin 223 includes a clamping head 2231 with a radial dimension larger than the limiting hole, and a first clamping tail 2232 and a second clamping tail 2233 that can respectively pass through the limiting hole. The locking pin 223 has an unlocked state and a locked state. When the locking pin 223 is in the locked state, the first clamping tail 2232 and the second clamping tail 2233 are respectively bent to prevent the locking pin 223 from detaching from the limiting hole; when the locking pin 223 is in the unlocked state, the first clamping tail 2232 and the second clamping tail 2233 respectively extend along the axis of the limiting hole and allow the locking pin 223 to detach from the limiting hole.

[0043] In this example, the extending direction of the first support member 2 is perpendicular to the extending direction of the second support member 3. The plurality of first support members 2 are equally spaced. There are 2n second support members 3 symmetrically arranged along the diameter of the support ring 1, where n is greater than or equal to 1.

[0044] In this example, the support ring 1 includes a support ring body 12 and a hook 13 with one end connected to the support ring body 12. The hook 13 has a hook groove 131 with an opening facing downwards.

[0045] Furthermore, as shown in Figure 1 The support ring 1, the first support member 2, and the second support member 3 divide the entire heating area into multiple areas. Of course, only the first support member 2 is provided with an electric heating element 5. Therefore, the division of the heating area by the second support member 3 only plays a minor role. The distribution state of the plurality of first support members 2 mainly determines the heating amount of the heating area. Therefore, in this example, it is preferred that the plurality of first support members 2 are equally spaced, so that the electric heating elements 5 can be equally spaced, ensuring the uniformity of heating. And for the distribution structure as shown in Figure 1 Both the first support member 2 and the second support member 3 are supported on the support ring 1, and the second support member 3 is located below the first support member 2 and plays a role in supporting the first support member 2. In this way, it is maximally ensured that the first support member 2 is not easily deformed. It has enough support points, making the overall stability better. During actual high-temperature use, it is not easily deformed, thus ensuring the durability of uniform heating.

[0046] As shown in Figure 2 The electric heating element 5 only exemplarily shows its schematic structure wound around the porcelain tube 4. In reality, the upper part of the electric heating element 5 can be lapped and supported on the porcelain tube 4. Figure 2 In order to clearly show the corresponding winding method, when the electric heating element 5 is wound, its upper part protrudes from the porcelain tube 4. Of course, if some auxiliary support components are used, the electric heating element 5 can also be fixed in the schematic structure shown in Figure 2 At the same time, the schematic diagram of the porcelain tube 4 formed by tightly splicing a plurality of sub-tubes 41 can be seen from Figure 2As can be seen, in the actual use process, there may also be a small gap between them, as long as it can be ensured that the electric heating element 5 does not contact the first support member 2.

[0047] See Figures 3 to 5 As shown, it gives a schematic structure of detachably arranging the first support member on the support ring. Through holes are provided on the support ring, and the locking rod 23 formed on the support body 21 can pass through the through holes, thus realizing the support. If it is necessary to further fix it detachably on the support ring, an external thread 231 is further provided on the locking rod 23, so that it can cooperate with the nut to achieve fastening. In this example, two nuts are provided, namely the first nut 221 and the second nut 222. The first nut 221 realizes locking the first support member relative to the support ring, and the second nut 222 plays the same role and can further hold the first nut 221 against it to prevent it from detaching, ensuring the stability of the locking. In particular, in this example, a locking pin 223 is also provided. The locking pin 223 is equivalent to a further stabilizing means. It is located at the rear side of the second nut 222, and its main function is to further hold the second nut 222 against it to prevent them from rotating in the reverse direction and detaching, greatly improving the long-term stability of the first support member on the support ring. Moreover, in this example, the locking pin 223 is formed by a heat-resistant material that can be bent, and locking and unlocking can be achieved by changing its shape, greatly improving the convenience; in addition, Figure 3 In the figure, the positions of the first nut 221, the second nut 222, and the locking pin 223 are relatively far apart only for the convenience of distinguishing these three components. In actual use, the second nut 222 can be abutted against the right end of the first nut 221, and the locking pin 223 can be abutted against the right end of the second nut 222.

[0048] See Figures 6 to 7 As shown, in this example, a plurality of through holes 11 for the first support member to pass through are formed on the support ring body 12 of the support ring, and at the same time, a hook 13 for fixing the support ring at a specific position is also provided. The hook 13 has a hook groove 131 with an opening facing downwards, which can be conveniently and easily hooked on the area to be fixed, with good operation convenience and without affecting the setting and use of other components.

[0049] In some other embodiments, an oxidation reaction vessel for synthesizing formaldehyde is also provided, including a reactor body having a reaction cavity and a heating component arranged in the reaction cavity. The heating component includes the above-mentioned heating mechanism.

[0050] In summary, based on the defects of the existing heating mechanism, such as being prone to high-temperature deformation resulting in uneven heat supply, damage or aging of some components requiring overall replacement, etc., the present utility model innovatively provides a heating mechanism with a new structure. The heating mechanism includes three-level supports, with a support ring as the basis, and further combines two interacting support members to achieve the stability and firmness of the overall structure, being not prone to high-temperature deformation. Then, by winding the electric heating element around the first support member through a porcelain tube, it is beneficial to the uniform distribution of the electric heating element and realizes uniform heat supply. In particular, by detachably arranging the first support member and forming the porcelain tube by multiple sub-tubes, the flexibility of the structure and the ability to facilitate replacement are greatly improved. When some components are damaged, only the damaged parts can be replaced through the design of these structures, greatly reducing the use cost.

[0051] The above embodiments are only for illustrating the technical concept and features of the present utility model, and the purpose is to enable those skilled in the art to understand the content of the present utility model and implement it accordingly. It cannot be used to limit the protection scope of the present utility model. Any equivalent changes or modifications made according to the spirit and essence of the present utility model should be covered within the protection scope of the present utility model.

Claims

1. A heating mechanism, characterized in that, The heating mechanism includes: A support assembly, which includes a support ring, a first support member, and a second support member. A plurality of the first support members are arranged in parallel. There is at least one second support member for supporting the first support members. Two ends of each first support member are detachably arranged on the support ring respectively, and two ends of the second support member are connected to the support ring respectively; A porcelain tube assembly, which includes a plurality of porcelain tubes. Each porcelain tube is sleeved on a corresponding first support member, and each porcelain tube is composed of a plurality of sub-tubes; An electric heating assembly, which includes a plurality of electric heating elements. Each electric heating element is wound around the porcelain tube on a corresponding first support member; The support ring, the first support member, and the second support member are not in contact with the electric heating element respectively.

2. The heating mechanism according to claim 1, wherein The materials of the support ring, the first support member, and the second support member are stainless steel materials respectively.

3. The heating mechanism according to claim 1, wherein The material of the electric heating element is copper.

4. The heating mechanism according to claim 1, wherein The first support member includes a support body, a locking member, and locking rods formed at two ends of the support body respectively. Through holes for inserting the locking rods are formed on the support ring, and the locking member cooperates with the locking rods to lock the support body on the support ring.

5. The heating mechanism according to claim 4, wherein External threads and limit holes are formed on the locking rods. The locking member includes a first nut, a second nut, and a locking pin. The first nut and the second nut can be screwed onto the locking rods respectively, and the second nut can abut against the first nut. The locking pin can be inserted into the limit hole, and the locking pin is used to prevent the second nut from detaching from the locking rod.

6. The heating mechanism according to claim 5, characterized in that, The locking pin is made of a heat-resistant material that can be bent. The locking pin includes a clamping head with a radial dimension larger than the limit hole, and a first clamping tail and a second clamping tail that can respectively pass through the limit hole. The locking pin has a locked state and an unlocked state. When the locking pin is in the locked state, the first clamping tail and the second clamping tail are bent respectively to prevent the locking pin from detaching from the limit hole; when the locking pin is in the unlocked state, the first clamping tail and the second clamping tail extend along the axis of the limit hole respectively and allow the locking pin to detach from the limit hole.

7. The heating mechanism according to claim 1, characterized in that, The extending direction of the first support member is perpendicular to the extending direction of the second support member; and / or, there are 2n second support members symmetrically arranged along the diameter of the support ring, where n is greater than or equal to 1.

8. The heating mechanism according to claim 1, wherein The plurality of sub-tubes are closely butted to form the porcelain tube; and / or, the plurality of first support members are equally spaced.

9. The heating mechanism according to claim 1, wherein, The support ring includes a support ring body and a hook connected to one end of the support ring body. The hook has a hook slot with an opening facing downwards.

10. An oxidation reaction vessel for synthesizing formaldehyde, comprising a reactor body having a reaction cavity and a heat supply component disposed in the reaction cavity, characterized in that, The heat supply assembly includes the heating mechanism according to any one of claims 1-9.

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