Constant-temperature closed reactor for formaldehyde preparation

Abstract

The utility model discloses a constant temperature closed reactor for formaldehyde preparation, which belongs to the technical field of formaldehyde production equipment and comprises a device body, a top cover is arranged on the upper surface of the device body, a boosting component is arranged in the top cover and comprises a driving mechanism, a first crown gear is connected outside the driving mechanism in a meshed manner, and a second crown gear is connected outside the first crown gear in a meshed manner. A half-thread sleeve is arranged in the first crown gear, a connecting plate is arranged outside the half-thread sleeve, and an isolation plate is arranged on the lower surface of the connecting plate. According to the reaction tank disclosed by the utility model, when residual raw materials need to be pushed, the working driving mechanism can drive the isolation plate to move downwards through the first crown gear and the half-thread sleeve so as to seal the raw material gas inlet pipe, and meanwhile, the second crown gear can drive the boosting plate to move downwards through the half-thread round rod so as to push the residual raw materials into the reaction tank body; according to the reactor, residual raw materials can be pushed into the reaction tank body, so that the situation that the local temperature of the reactor is high or low due to non-uniform methanol content is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of formaldehyde production equipment, and specifically relates to a constant temperature closed reactor for formaldehyde preparation. Background Art

[0002] There are two methods for preparing formaldehyde from methanol: the silver method and the iron-molybdenum method. Formaldehyde gas can be obtained by reacting a mixture of methanol and air under the action of a catalyst. In a tubular reactor with an iron-molybdenum catalyst, the raw gas enters the reactor raw gas cavity from the reactor inlet, and then enters the catalyst loading tube from the raw gas cavity. After contacting the iron-molybdenum catalyst, an oxidation reaction occurs. The mixed gas after the reaction enters the lower insulation layer cavity, and then is transported from the reactor outlet to the vaporizer and absorption tower.

[0003] In the prior art, in a general formaldehyde reactor, after the raw gas enters the reactor, a portion of it enters the reaction tank body and contacts with the catalyst in the tank body to react, and a portion of it will remain in the air inlet pipe, causing uneven mixing of methanol and air in the raw gas. After the raw gas with uneven methanol content enters the reaction tank body and contacts with the catalyst, the heat released by the reaction will vary due to the uneven methanol content, resulting in high and low local temperatures in the reactor. Therefore, a constant temperature closed reactor for formaldehyde preparation is needed to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a constant temperature closed reactor for preparing formaldehyde to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a constant temperature closed reactor for preparing formaldehyde, comprising a device body, a top cover is provided on the upper surface of the device body, a booster assembly is provided inside the top cover, the booster assembly comprises a driving mechanism, a first crown gear is meshedly connected to the outside of the driving mechanism, a semi-threaded sleeve is provided inside the first crown gear, a connecting plate is provided outside the semi-threaded sleeve, an isolation plate is provided on the lower surface of the connecting plate, a bearing is provided at the top end of the semi-threaded sleeve, a second crown gear is clamped outside the bearing, a semi-threaded round rod is provided inside the second crown gear, and a booster plate is provided at the bottom end of the semi-threaded round rod.

[0006] By providing a driving mechanism, a first crown gear, a semi-threaded sleeve, a connecting plate, an isolating plate, a bearing, a second crown gear, a semi-threaded round rod and a booster plate, when it is necessary to push the residual raw material, the driving mechanism is started, and the working driving mechanism drives the first crown gear to rotate, and the rotating first crown gear drives the semi-threaded sleeve to move downward, thereby driving the connecting plate and the isolating plate to move downward, and sealing the raw material inlet pipe, and at the same time, the second crown gear moves downward with the semi-threaded sleeve, thereby meshing with the driving mechanism, and then the driving mechanism drives the second crown gear to rotate, and the rotating second crown gear drives the semi-threaded round rod to move downward, thereby driving the booster plate to move downward, and the raw material remaining in the raw material inlet pipe is pushed into the reaction tank body.

[0007] As a preferred embodiment, the lower surface of the device body is provided with supporting legs, the number of the supporting legs is four and they are distributed in a circular array, the device body is provided with a constant temperature layer, and the constant temperature layer is provided with a reaction tank body.

[0008] By providing a constant temperature layer, the reaction tank body can be kept warm, preventing the reaction tank body from being damaged due to excessive temperature difference.

[0009] As a preferred embodiment, a raw material air inlet pipe is opened in the top cover, a formaldehyde air outlet is opened in the top cover, the raw material air inlet pipe and the formaldehyde air outlet are symmetrically arranged, and a limiting groove is provided in the top cover, and the limiting groove is located above the raw material air inlet pipe.

[0010] By setting a limiting groove, when it is necessary to isolate the raw material intake pipe, the first crown gear will drive the semi-threaded sleeve to move downward, thereby driving the connecting plate and the isolation plate to move downward, and the limiting groove can limit the semi-threaded sleeve through the connecting plate to prevent the semi-threaded sleeve from rotating with the first crown gear, and when it is necessary to push the residual raw material, the second crown gear will drive the semi-threaded round rod to move downward, thereby driving the booster plate to move downward, and the limiting groove can limit the semi-threaded round rod through the booster plate to prevent the semi-threaded round rod from rotating with the second crown gear.

[0011] As a preferred implementation, a movable groove is provided in the top cover, and the movable groove is located above the limiting groove.

[0012] By providing the moving groove, the second crown gear can move in the top cover, which is more convenient.

[0013] As a preferred implementation, a protective cover is provided outside the top cover.

[0014] By providing a protective cover, the driving mechanism can be protected to prevent the driving mechanism from being hit and then damaged.

[0015] As a preferred embodiment, the driving mechanism is rotatably connected in the top cover, the first crown gear is located in the moving groove, the connecting plate is located in the limiting groove, the isolation plate is located in the limiting groove, the second crown gear is located in the moving groove, the semi-threaded round rod is slidably connected in the semi-threaded sleeve, and the booster plate is located on one side of the isolation plate.

[0016] By providing a driving mechanism, a first crown gear, a semi-threaded sleeve, a connecting plate and an isolating plate, when the raw materials need to be isolated, the driving mechanism is started, the working driving mechanism will drive the first crown gear to rotate, and the rotating first crown gear will drive the semi-threaded sleeve to move downward, thereby driving the connecting plate and the isolating plate to move downward, and sealing the raw material inlet pipe.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] The utility model is provided with a driving mechanism, a first crown gear, a semi-threaded sleeve, a connecting plate, an isolating plate, a bearing, a second crown gear, a semi-threaded round rod and a booster plate. When it is necessary to push the residual raw material, the working driving mechanism will drive the isolating plate to move downward through the first crown gear and the semi-threaded sleeve to seal the raw material inlet pipe. At the same time, the second crown gear will drive the booster plate to move downward through the semi-threaded round rod to push the residual raw material into the reaction tank body. The reactor can push the residual raw material into the reaction tank body to prevent the methanol content from being uneven, thereby causing the problem of high and low local temperatures in the reactor.

[0019] The utility model provides a limiting groove, when it is necessary to isolate the raw material intake pipe, the first crown gear will drive the semi-threaded sleeve to move downward, thereby driving the connecting plate and the isolation plate to move downward, the limiting groove can limit the semi-threaded sleeve through the connecting plate, and prevent the semi-threaded sleeve from rotating together with the first crown gear, and when it is necessary to push the residual raw material, the second crown gear will drive the semi-threaded round rod to move downward, thereby driving the booster plate to move downward, and the limiting groove can limit the semi-threaded round rod through the booster plate, and prevent the semi-threaded round rod from rotating together with the second crown gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model in a frontal perspective;

[0021] Figure 2 It is a schematic diagram of the sectional structure of the utility model in a front view;

[0022] Figure 3 It is a schematic diagram of a front three-dimensional cross-sectional structure of the top cover of the utility model;

[0023] Figure 4 It is a schematic diagram of a side-view three-dimensional cross-sectional structure of the top cover of the utility model;

[0024] Figure 5 For this utility model Figure 2 The enlarged view of point A in the middle;

[0025] Figure 6 For this utility model Figure 3 The enlarged view of point B in the middle;

[0026] Figure 7 For this utility model Figure 4 Enlarged view of point C in the middle.

[0027] In the figure: 1. Device body; 2. Support legs; 3. Constant temperature layer; 4. Reaction tank body; 5. Top cover; 6. Raw material air inlet pipe; 7. Formaldehyde air outlet; 8. Limiting groove; 9. Moving groove; 10. Protective cover; 11. Boosting assembly; 111. Driving mechanism; 112. First crown gear; 113. Semi-threaded sleeve; 114. Connecting plate; 115. Isolation plate; 116. Bearing; 117. Second crown gear; 118. Semi-threaded round rod; 119. Boosting plate. DETAILED DESCRIPTION

[0028] The utility model is further described below in conjunction with embodiments.

[0029] The following examples are used to illustrate the present invention, but cannot be used to limit the scope of protection of the present invention. The conditions in the examples can be further adjusted according to specific conditions, and simple improvements to the method of the present invention under the premise of the concept of the present invention are all within the scope of protection claimed by the present invention.

[0030] See also Figure 1-7 The utility model provides a constant temperature closed reactor for preparing formaldehyde, comprising a device body 1, a supporting leg 2 is arranged on the lower surface of the device body 1, the number of the supporting legs 2 is four and they are distributed in a ring array, a constant temperature layer 3 is arranged in the device body 1, a reaction tank body 4 is arranged in the constant temperature layer 3, the constant temperature layer 3 can be used to keep the reaction tank body 4 warm, and prevent the reaction tank body 4 from being damaged due to excessive temperature difference, a top cover 5 is arranged on the upper surface of the device body 1, a raw material air inlet pipe 6 is opened in the top cover 5, a formaldehyde air outlet 7 is opened in the top cover 5, the raw material air inlet pipe 6 and the formaldehyde air outlet 7 are symmetrically arranged, a limiting groove 8 is arranged in the top cover 5, the limiting groove 8 is located above the raw material air inlet pipe 6, a moving groove 9 is arranged in the top cover 5, the moving groove 9 is located above the limiting groove 8, and a protective cover 10 is arranged outside the top cover 5;

[0031] A booster assembly 11 is provided in the top cover 5, and the booster assembly 11 includes a driving mechanism 111. By providing a protective cover 10, the driving mechanism 111 can be protected to prevent the driving mechanism 111 from being collided and then damaged. The driving mechanism 111 is rotatably connected in the top cover 5, and the driving mechanism 111 is externally meshed and connected with a first crown gear 112, and the first crown gear 112 is located in the moving groove 9. A semi-threaded sleeve 113 is provided in the first crown gear 112, and a connecting plate 114 is provided outside the semi-threaded sleeve 113. The connecting plate 114 is located in the limiting groove 8, and an isolation plate 115 is provided on the lower surface of the connecting plate 114. By providing the driving mechanism 111, the first crown gear 112, the semi-threaded sleeve 113, the connecting plate 114 and the isolation plate 115, 5. When it is necessary to isolate the raw material, the driving mechanism 111 is started. The working driving mechanism 111 will drive the first crown gear 112 to rotate. The rotating first crown gear 112 will drive the semi-threaded sleeve 113 to move downward, thereby driving the connecting plate 114 and the isolation plate 115 to move downward to seal the raw material inlet pipe 6. The isolation plate 115 is located in the limiting groove 8. A bearing 116 is provided at the top of the semi-threaded sleeve 113. The second crown gear 117 is clamped on the outside of the bearing 116. The bearing 116 reduces the friction resistance of the semi-threaded sleeve 113 in the second crown gear 117, and can limit the second crown gear 117. The second crown gear 117 is located in the moving groove 9. The moving groove 9 is provided to make the second crown gear 117 7 can be moved in the top cover 5, which is more convenient. A semi-threaded round rod 118 is arranged in the second crown gear 117. The semi-threaded round rod 118 is slidably connected in the semi-threaded sleeve 113. A booster plate 119 is arranged at the bottom end of the semi-threaded round rod 118. By setting the limiting groove 8, when it is necessary to isolate the raw material intake pipe 6, the first crown gear 112 will drive the semi-threaded sleeve 113 to move downward, thereby driving the connecting plate 114 and the isolation plate 115 to move downward. The limiting groove 8 can limit the semi-threaded sleeve 113 through the connecting plate 114 to prevent the semi-threaded sleeve 113 from rotating with the first crown gear 112. When it is necessary to push the residual raw material, the second crown gear 117 will drive the semi-threaded round rod 118 to move downward, thereby driving the booster plate 119. 9 moves downward, the limiting groove 8 can limit the semi-threaded round rod 118 through the booster plate 119 to prevent the semi-threaded round rod 118 from rotating with the second crown gear 117. The booster plate 119 is located on one side of the isolation plate 115. By providing the second crown gear 117, the semi-threaded round rod 118 and the booster plate 119, when it is necessary to push the residual raw material, the second crown gear 117 will move downward with the semi-threaded sleeve 113, thereby engaging with the driving mechanism 111, and then the driving mechanism 111 will drive the second crown gear 117 to rotate, and the rotating second crown gear 117 will drive the semi-threaded round rod 118 to move downward, thereby driving the booster plate 119 to move downward, and the raw material remaining in the raw material inlet pipe 6 is pushed into the reaction tank body 4.

[0032] The working principle and use process of the utility model are as follows: when it is necessary to push the residual raw material, the driving mechanism 111 is started, and the working driving mechanism 111 will drive the first crown gear 112 to rotate, and the rotating first crown gear 112 will drive the semi-threaded sleeve 113 to move downward, thereby driving the connecting plate 114 and the isolation plate 115 to move downward, and the raw material inlet pipe 6 is sealed. At the same time, the second crown gear 117 will move downward with the semi-threaded sleeve 113, thereby engaging with the driving mechanism 111, and then the driving mechanism 111 will drive the second crown gear 117 to rotate, and the rotating second crown gear 117 will drive the semi-threaded round rod 118 to move downward, thereby driving the booster plate 119 to move downward, and the raw material remaining in the raw material inlet pipe 6 is pushed into the reaction tank body 4.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thermostatic closed reactor for preparing formaldehyde, comprising a device body (1), characterized in that: A top cover (5) is provided on the upper surface of the device body (1), a booster assembly (11) is provided inside the top cover (5), and the booster assembly (11) comprises a driving mechanism (111), the driving mechanism (111) is externally meshedly connected with a first crown gear (112), a semi-threaded sleeve (113) is provided inside the first crown gear (112), a connecting plate (114) is provided outside the semi-threaded sleeve (113), an isolation plate (115) is provided on the lower surface of the connecting plate (114), a bearing (116) is provided at the top end of the semi-threaded sleeve (113), a second crown gear (117) is externally clamped on the bearing (116), a semi-threaded round rod (118) is provided inside the second crown gear (117), and a booster plate (119) is provided at the bottom end of the semi-threaded round rod (118).

2. A constant temperature closed reactor for preparing formaldehyde according to claim 1, characterized in that: The lower surface of the device body (1) is provided with supporting legs (2), the number of the supporting legs (2) is four and they are distributed in a ring array, the device body (1) is provided with a constant temperature layer (3), and the constant temperature layer (3) is provided with a reaction tank body (4).

3. A constant temperature closed reactor for preparing formaldehyde according to claim 1, characterized in that: A raw material air inlet pipe (6) is provided in the top cover (5), and a formaldehyde air outlet (7) is provided in the top cover (5). The raw material air inlet pipe (6) and the formaldehyde air outlet (7) are symmetrically arranged with each other. A limiting groove (8) is provided in the top cover (5), and the limiting groove (8) is located above the raw material air inlet pipe (6).

4. A thermostatic closed reactor for preparing formaldehyde according to claim 1, characterized in that: A movable groove (9) is provided in the top cover (5), and the movable groove (9) is located above the limiting groove (8).

5. The isothermal closed reactor for preparing formaldehyde according to claim 1, characterized in that: The top cover (5) is provided with a protective cover (10) outside.

6. A constant temperature closed reactor for preparing formaldehyde according to claim 1, characterized in that: The driving mechanism (111) is rotatably connected in the top cover (5); the first crown gear (112) is located in the moving groove (9); the connecting plate (114) is located in the limiting groove (8); the isolation plate (115) is located in the limiting groove (8); the second crown gear (117) is located in the moving groove (9); the semi-threaded round rod (118) is slidably connected in the semi-threaded sleeve (113); and the booster plate (119) is located on one side of the isolation plate (115).

Images