A packable tubular radiant catalytic reactor

Abstract

The present application relates to the technical fields of solid catalyst heating, in particular to a loadable column radiation catalytic reaction furnace, which comprises a shell and heating pipes, the inner wall of the shell is connected with an insulation layer, the heating pipes are installed in the shell, the shell is provided with a heating assembly for heating the heating pipes, the heating pipes comprise vertical pipes and horizontal pipes, the vertical pipes are provided with several, the horizontal pipes are connected between two adjacent vertical pipes, an inlet pipe is connected to one vertical pipe, an outlet pipe is connected to one vertical pipe, and the two ends of the vertical pipe are connected with closed flanges. The present application has the effect of improving the cleaning efficiency of the heating pipes.

Description

Technical Field

[0001] This invention relates to the field of solid catalyst heating technology, and in particular to a fillable tube-type radiation catalytic reactor. Background Technology

[0002] To facilitate the generation of new gas from a gaseous medium via a solid catalyst catalytic reaction, workers need to bring the solid catalyst to a specific catalytic temperature. A refillable tube-type radiative catalytic reactor is commonly used to heat the solid catalyst. The principle is that the solid catalyst is placed inside the heating tubes of the reactor, and the heating elements within the reactor generate thermal radiation. This radiation causes the heating tubes to heat up, exchanging heat with the solid catalyst inside, thus raising the catalyst's temperature to the specific catalytic temperature and achieving the effect of generating new gas from a gaseous medium.

[0003] However, current technology requires solid catalysts to be heated within a heating tube at least 12 meters long to obtain the required amount of gas from the chemical reaction in the gaseous medium. New gas will undergo scaling at high temperatures; the more scale forms, the more heat it absorbs, leading to a decrease in the heat exchange efficiency of the heating tube and potentially causing substandard internal temperatures and excessively high external temperatures. This can easily result in safety accidents such as bulging, cracking, or tube bursting. Therefore, regular cleaning of the heating tube is necessary. However, a 12-meter heating tube is quite long, increasing the difficulty and labor intensity for workers and reducing cleaning efficiency. Summary of the Invention

[0004] To improve the cleaning efficiency of heating tubes, this application provides a refillable tube-type radiation catalytic reactor.

[0005] This application provides a fillable tubular radiation catalytic reactor with the following technical solution:

[0006] A refillable tube-type radiation catalytic reactor includes a shell and heating tubes. An insulation layer is connected to the inner wall of the shell. The heating tubes are installed inside the shell. A heating assembly for heating the heating tubes is provided on the shell. The heating tubes include vertical tubes and horizontal tubes. Several vertical tubes are provided. A horizontal tube is connected between two adjacent vertical tubes. An inlet pipe is connected to one vertical tube, and an outlet pipe is connected to one vertical tube. Both ends of the vertical tubes are connected to sealing flanges.

[0007] By adopting the above technical solution, during heating, the solid catalyst is placed inside the heating tube beforehand, and then the gaseous medium is introduced into the heating tube. The heating element heats the heating tube, causing the solid catalyst to catalyze the gaseous medium in a high-temperature environment to generate new gas. The sealing flange is used on one side for easy connection to other components and on the other side for easy sealing of both ends of the vertical pipe. The heating tube is divided into several vertical and horizontal pipes. This arrangement not only reduces the space occupied by the heating tube and makes it easier to install, but also allows workers to easily clean scale and solid catalyst inside the vertical pipe using tools through the sealing flange. This reduces the difficulty of cleaning scale inside the heating tube, lowers the labor intensity of workers, and improves the cleaning efficiency of the heating tube.

[0008] Optionally, a filter plate is connected to one end of the horizontal tube near the inlet tube, and the filter plate has a plurality of filter holes.

[0009] By adopting the above technical solution, scale will form on the gas under high temperature conditions, and there is also a possibility of scale formation in the horizontal pipe. Due to the installation position of the horizontal pipe, the scale inside the horizontal pipe is difficult to clean. By installing a filter plate inside the horizontal pipe, the filter holes only allow gas to flow through, so that the solid catalyst and scale are intercepted as much as possible inside the vertical pipe, making it easier for workers to clean the scale.

[0010] Optionally, a cooling water jacket is provided on the vertical pipe near the closed flange, and the cooling water jackets on the same side are connected in series.

[0011] By adopting the above technical solution, after the riser pipe heats up, the temperature of the sealing flange also increases, which raises the possibility of deformation. The sealing flange relies on bolts tightly fitting the sealing plate to achieve a seal; if it deforms, the sealing effect will fail, and gas will leak at the sealing flange. Workers use the flowing water in the cooling water jacket to cool the riser pipe area near the sealing flange, thereby reducing the temperature of the sealing flange and minimizing the possibility of deformation.

[0012] Optionally, a temperature sensor is connected to the closed flange at the top of the vertical pipe, and the sensing end of the temperature sensor passes through the closed flange and extends into the interior of the vertical pipe.

[0013] By adopting the above technical solution, the temperature sensor can not only detect the actual temperature of the solid catalyst in each vertical pipe, enabling staff to better control the temperature rise of the solid catalyst, but also determine the difference in the scale content in each vertical pipe by the rate of solid catalyst temperature rise, so as to remind staff to clean the scale in the vertical pipe in time.

[0014] Optionally, the vertical pipe is provided with a plurality of reinforcing rings, and the vertical pipe passes through the reinforcing rings.

[0015] By adopting the above technical solution, the vertical pipe may deform when heated. The reinforcing ring is used to restrain the vertical pipe, reducing the possibility of deformation.

[0016] Optionally, a fixing seat is connected to the vertical tube near the bottom end of the vertical tube, and the vertical tube is mounted on the housing through the fixing seat. A compensating corrugated pipe is provided on the vertical tube near the top end of the vertical tube.

[0017] By adopting the above technical solution, when the vertical pipe is heated, it extends along its length due to the constraint of the reinforcing ring. This can easily cause the temperature sensor located at the top of the vertical pipe to shift, potentially damaging it. To address this, the heating element is secured within the housing using a fixing bracket, ensuring the vertical pipe extends towards its top. A compensating bellows is then installed, causing deformation to compensate for the increased length of the vertical pipe, thus preventing temperature sensor displacement and reducing the likelihood of damage.

[0018] Optionally, the heating assembly includes a fixing frame, a heating steel pipe, an insulating ring, and a junction box. The fixing frame is connected to the inner wall of the housing. Several heating steel pipes are connected to the fixing frame. The insulating ring is connected between the fixing frame and the heating steel pipes. The junction box is connected to the outer wall of the housing and is electrically connected to the heating steel pipes.

[0019] By adopting the above technical solution, workers installed the heating steel pipe on a fixed frame to secure it, and used an insulating ring to separate the heating steel pipe from the fixed frame, reducing the possibility of short circuits. During heating, workers used a junction box to energize the heating steel pipe, causing it to generate heat radiation. The temperature of the heating pipe increased due to the heat radiation, achieving the effect of heating the pipe to a higher temperature.

[0020] Optionally, the heating steel pipe is made of an austenitic nickel-chromium alloy material.

[0021] By adopting the above technical solutions, nickel-chromium alloys possess high high-temperature strength, good plasticity, high emissivity, non-magnetic properties, and good corrosion resistance, enabling heating steel pipes to maintain long-term use and improving their reliability.

[0022] Optionally, the insulation layer is made of compressed ceramic fiber cotton modules and aerogel material, and the fixing frame is connected to the insulation layer.

[0023] By adopting the above technical solution, the insulation layer made of compressed ceramic fiber cotton module and aerogel material has excellent heat preservation effect. The ceramic fiber cotton itself has good thermal stability and heat insulation performance, which can effectively ensure that the temperature inside the shell does not get lost.

[0024] In summary, this application includes at least one of the following beneficial technical effects:

[0025] 1. During heating, the solid catalyst is placed inside the heating tube beforehand. Then, the gaseous medium is introduced into the heating tube, and the heating element heats the tube, causing the solid catalyst to catalyze the gaseous medium at high temperature to generate new gas. A sealing flange is used on one side for easy connection to other components and on the other side for sealing both ends of the vertical pipe. The heating tube is divided into several vertical and horizontal pipes. This design not only reduces the space occupied by the heating tube and facilitates its installation, but also allows workers to easily clean scale and solid catalyst from the vertical pipes using tools through the sealing flange. This reduces the difficulty of cleaning scale from the heating tubes, lowers the workload for workers, and improves the cleaning efficiency of the heating tubes. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of the fillable tube-type radiation catalytic reactor in the embodiments of this application.

[0027] Figure 2 This is a cross-sectional view used in the embodiments of this application to illustrate the internal structure of the fillable tube-type radiation catalytic reactor.

[0028] Figure 3 This is a partial structural schematic diagram of the heating component in an embodiment of this application.

[0029] Figure 4 This is a schematic diagram of the overall structure of the three sets of heating tubes in the embodiment of this application.

[0030] Figure 5 This is a schematic diagram of the structure of a group of heating tubes in an embodiment of this application.

[0031] Figure 6 This is a partial cross-sectional view used to illustrate the filter plate structure in the embodiments of this application.

[0032] Explanation of reference numerals in the attached drawings: 1. Shell; 11. Furnace cover; 12. Furnace shell; 13. Furnace bottom cover; 2. Insulation layer; 3. Heating assembly; 31. Fixing frame; 32. Heating steel pipe; 33. Insulating ring; 34. Junction box; 4. Heating tube; 41. Vertical tube; 411. Inlet tube; 412. Outlet tube; 413. Fixing base; 414. Compensating corrugated pipe; 415. Sealing flange; 42. Horizontal tube; 5. Reinforcing ring; 6. Temperature sensor; 7. Sealing valve; 8. Cooling water jacket; 9. Filter plate; 91. Filter hole. Detailed Implementation

[0033] The following is in conjunction with the appendix Figure 1-6 This application will be described in further detail.

[0034] This application discloses a refillable tube-type radiation catalytic reactor. (See also...) Figure 1 and Figure 2 A refillable tube-type radiation catalytic reactor includes a shell 1 with a total length of 4250 mm, a cylindrical shape, and a diameter of 2200 mm. The shell 1 includes a furnace cover 11, a furnace shell 12, and a furnace bottom cover 13. The furnace cover 11 is connected to the top of the furnace shell 12 via a flange, and the furnace bottom cover 13 is connected to the bottom of the furnace shell 12 via a flange. Insulation layers 2 are fixedly connected to the inner walls of the furnace cover 11, furnace shell 12, and furnace bottom cover 13. The insulation layers 2 are made of compressed ceramic fiber cotton modules and aerogel material, wherein the aerogel is silica aerogel, which is suitable for high-temperature environments and mainly used to insulate the shell 1.

[0035] Reference Figure 2 and Figure 3 The insulation layer 2 contains several sets of heating components 3. This embodiment uses three sets as an example. Each heating component 3 includes a mounting frame 31, a heating steel pipe 32, an insulating ring 33, and a junction box 34. The mounting frame 31 is fixedly connected to the inner wall of the insulation layer 2. The heating steel pipe 32 is made of austenitic nickel-chromium alloy. Several heating steel pipes 32 are mounted on the mounting frame 31. The insulating ring 33 is fixedly connected between the heating steel pipe 32 and the mounting frame 31, and is used to insulate the heating steel pipe 32. Several junction boxes 34 are fixedly connected to the surface of the furnace shell 12. The junction boxes 34 are explosion-proof to improve the safety of the refillable tube-type radiation catalytic reactor during operation. The junction boxes 34 are electrically connected to the heating steel pipes 32.

[0036] Reference Figure 2 and Figure 4 The housing 1 contains a heating tube 4 made of NO6617 nickel-based alloy. Several groups of heating tubes 4 are provided; this embodiment uses three groups as an example. Each heating tube 4 includes several vertical tubes 41 and horizontal tubes 42. In this embodiment, a group of three vertical tubes 41 and two horizontal tubes 42 constitutes a heating tube 4. The horizontal tubes 42 are fixedly connected between two adjacent vertical tubes 41. An inlet tube 411 is fixedly connected to one vertical tube 41 near its top, and an outlet tube 412 is fixedly connected to another vertical tube 41 near its bottom. The NO6617 nickel-based alloy has excellent high-temperature resistance and corrosion resistance, allowing the heating tube 4 to maintain good mechanical properties even at long-term high temperatures of 1100 degrees Celsius.

[0037] Reference Figure 5A fixing seat 413 is fixedly connected to a vertical pipe 41 inside a set of heating tubes 4. The fixing seat 413 is installed on the furnace bottom cover 13, and the vertical pipe 41 passes through the furnace top cover. A compensating corrugated pipe 414 is fixedly connected to the vertical pipe 41 near the cooling water jacket 8 at the top of the vertical pipe 41. The compensating corrugated pipe 414 is used to compensate for the deformation in the length direction of the vertical pipe 41, reducing the possibility of the temperature sensor 6 being damaged due to displacement.

[0038] Reference Figure 4 A number of reinforcing rings 5 ​​are fixedly connected to the vertical tube 41. In this embodiment, six are used as an example. The vertical tube 41 is inserted through the reinforcing rings 5. The three sets of heating tubes 4 are evenly distributed around the axis of the reinforcing rings 5. The reinforcing rings 5 ​​are used to restrain the vertical tube 41 and reduce the possibility of deformation of the vertical tube 41.

[0039] Reference Figure 5 Both ends of the riser 41 are equipped with sealing flanges 415, with a distance of 5200mm between them. A temperature sensor 6 is installed at the top of the riser 41, fixedly connected to the sealing flange 415 at the top of the riser 41. The sensing end of the temperature sensor 6 passes through the sealing flange 415 and extends into the interior of the riser 41. The temperature sensor 6 is used to monitor the actual temperature of the solid catalyst inside the riser 41 and to determine the amount of scale buildup inside the riser 41 based on temperature changes, facilitating timely cleaning of the riser 41 by personnel. A sealing valve 7 is installed at the bottom of the riser 41, bolted to the sealing flange 415. The sealing valve 7 is used to facilitate the discharge of the solid catalyst.

[0040] Reference Figure 5 To reduce the possibility of gas leakage caused by deformation of the sealing flange 415 at high temperatures, a cooling water jacket 8 is fixedly connected to the riser 41 near the sealing flange 415, and the cooling water jackets 8 on the same side are connected in series.

[0041] Reference Figure 5 and Figure 6 To facilitate the cleaning of scale inside the vertical pipe 41, a filter plate 9 is fixedly connected to one end of the horizontal pipe 42 near the inlet pipe 411. The filter plate 9 has several filter holes 91. The filter plate 9 is used to prevent scale from entering the horizontal pipe 42, so that the scale is as confined as possible inside the vertical pipe 41, making it easier for the staff to clean.

[0042] The net heating power of the fillable tube radiative catalytic reactor in this embodiment is about 300 kW (not considering heat dissipation). Considering factors such as heat dissipation, the design power of the fillable tube radiative catalytic reactor is 450 kW, and the power of each group of heating steel tubes is 150 kW.

[0043] The implementation principle of a fillable tube-type radiation catalytic reactor according to an embodiment of this application is as follows: During heating, the operator first puts the solid catalyst into the vertical tube 41 and supplies the gas medium into the inlet pipe 411. Then, the junction box 34 is energized to energize the heating steel pipe 32. The heating steel pipe 32 generates heat radiation, and the heating tube 4 is heated by the heat radiation. The solid catalyst undergoes a chemical reaction under the influence of temperature to catalyze the gas medium. The new gas generated by the catalytic reaction of the solid catalyst completes the catalysis of the gas medium.

[0044] The staff divided the heating tube 4 into several vertical tubes 41 and horizontal tubes 42. This arrangement not only reduced the space occupied by the heating tube 4 and made it easier to install, but also made it easier for the staff to use tools to clean the scale and solid catalyst inside the vertical tubes 41 through the sealed flange 415. This reduced the difficulty of cleaning the scale inside the heating tube 4, reduced the labor intensity of the staff, and improved the cleaning efficiency of the heating tube 4.

[0045] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A refillable tube-type radiation catalytic reactor, characterized in that: The device includes a housing (1) and a heating tube (4). An insulation layer (2) is connected to the inner wall of the housing (1). The heating tube (4) is installed inside the housing (1). A heating assembly (3) for heating the heating tube (4) is provided on the housing (1). The heating tube (4) includes a vertical tube (41) and a horizontal tube (42). Several vertical tubes (41) are provided. The horizontal tube (42) is connected between two adjacent vertical tubes (41). An inlet pipe (411) is connected to one vertical tube (41), and an outlet pipe (412) is connected to one vertical tube (41). Both ends of the vertical tube (41) are connected to a sealing flange (415).

2. The refillable tube-type radiation catalytic reactor according to claim 1, characterized in that: The horizontal tube (42) is connected to a filter plate (9) at one end near the inlet tube (411), and the filter plate (9) has a plurality of filter holes (91).

3. The refillable tube-type radiation catalytic reactor according to claim 1, characterized in that: A cooling water jacket (8) is provided on the vertical pipe (41) near the closed flange (415), and the cooling water jackets (8) on the same side are connected in series.

4. The refillable tube-type radiation catalytic reactor according to claim 1, characterized in that: A temperature sensor (6) is connected to the closed flange (415) at the top of the vertical pipe (41). The sensing end of the temperature sensor (6) passes through the closed flange (415) and extends into the interior of the vertical pipe (41).

5. The refillable tube-type radiation catalytic reactor according to claim 1, characterized in that: The vertical tube (41) is provided with several reinforcing rings (5), and the vertical tube (41) passes through the reinforcing rings (5).

6. The refillable tube-type radiation catalytic reactor according to claim 1, characterized in that: A fixing seat (413) is connected to the vertical tube (41) near the bottom end of the vertical tube (41). The vertical tube (41) is installed on the housing (1) through the fixing seat (413). A compensating corrugated pipe (414) is provided on the vertical tube (41) near the top end of the vertical tube (41).

7. The refillable tubular radiative catalytic reactor according to claim 1, characterized in that: The heating assembly (3) includes a fixing frame (31), a heating steel pipe (32), an insulating ring (33), and a junction box (34). The fixing frame (31) is connected to the inner wall of the housing (1). Several heating steel pipes (32) are connected to the fixing frame (31). The insulating ring (33) is connected between the fixing frame (31) and the heating steel pipes (32). The junction box (34) is connected to the outer wall of the housing (1) and is electrically connected to the heating steel pipes (32).

8. The refillable tubular radiative catalytic reactor according to claim 7, characterized in that: The heating steel pipe (32) is made of austenitic nickel-chromium alloy material.

9. The refillable tubular radiative catalytic reactor according to claim 7, characterized in that: The insulation layer (2) is made of compressed ceramic fiber cotton modules and aerogel material, and the fixing frame (31) is connected to the insulation layer (2).

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