External thermal insulation structure of high-temperature reaction kettle

Abstract

The utility model belongs to the technical field of thermal insulation of high-temperature reaction kettles, and particularly relates to an external thermal insulation structure of a high-temperature reaction kettle, which comprises a barrel body, end sockets connected to two ends of the barrel body and a catalyst bed layer arranged in the barrel body, and the external thermal insulation structure comprises a first thermal insulation material arranged on the outer wall of the reaction kettle, another layer of first thermal insulation material is further stacked on the first thermal insulation material in the non-bed area of the barrel, a second thermal insulation material is further stacked on the first thermal insulation material in the non-bed area of the end socket, and the thermal insulation performance of the first thermal insulation material is better than that of the second thermal insulation material. According to the distribution characteristics of the temperature of the outer surface of the reaction kettle, various thermal insulation materials with various thicknesses are selected, corresponding external thermal insulation structures are designed for different areas of the outer wall of the reaction kettle, and finally, the temperature of the outer wall of the whole reaction kettle is kept at about 300 DEG C, so that the heat loss is reduced, and the optimal energy-saving effect is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of high-temperature reactor insulation technology, specifically relating to an external insulation structure for a high-temperature reactor. Background Technology

[0002] The existing high-temperature reactor structure includes a horizontal cylindrical body and two end caps connected to both ends of the body. Inlets for gaseous material entry and outlet are located at the top and bottom of the body, respectively. Inside the reactor is a catalyst bed, which consists of a refractory brick platform (with a certain porosity to support the passage of gaseous media) formed at its center by refractory bricks, and a catalyst bed layer approximately 1.5m thick, situated on the refractory brick platform. The reactor's workflow is roughly as follows: high-temperature material enters through the top inlet and reacts vertically through the catalyst bed; gaseous reaction products exit through the bottom inlet and proceed to the next process.

[0003] The internal temperature of the aforementioned reactor is maintained at around 600℃. The outer wall of the reactor is made of ordinary carbon steel, and the temperature needs to be controlled between 120℃ and 350℃. Therefore, the reactor needs to be equipped with an external insulation structure to achieve the purpose of preventing scalding and saving energy. However, the current external insulation structure uses a single material and a single thickness of insulation material to wrap the entire outer surface of the reactor, which can only ensure that the highest temperature point is <350℃ and the lowest temperature point is >120℃. This results in a large fluctuation in the surface temperature of the reactor depending on the area, and some low-temperature areas have a large amount of heat dissipation, resulting in waste. Summary of the Invention

[0004] To overcome the above problems, this utility model proposes an external insulation structure for a high-temperature reactor to reduce heat loss in the reactor.

[0005] This utility model achieves its purpose through the following technical solution. A high-temperature reactor external insulation structure, the reactor comprising a cylinder, end caps connected to both ends of the cylinder, and a catalyst bed disposed within the cylinder, the external insulation structure comprising a first insulation material disposed on the outer wall of the reactor, another layer of first insulation material stacked on the first insulation material in the non-bed area of ​​the cylinder, and a second insulation material stacked on the first insulation material in the non-bed area of ​​the end caps, the first insulation material having better thermal insulation performance than the second insulation material.

[0006] Furthermore, the thickness of the first insulation material is 3-10mm, and the thickness of the second insulation material is 1-10mm.

[0007] Furthermore, the thickness of the first insulation material is 8mm, and the thickness of the second insulation material is 5mm.

[0008] Furthermore, the first insulation material is aerogel felt, and the second insulation material is ceramic fiber paper.

[0009] This utility model has the following advantages:

[0010] Based on the temperature distribution characteristics of the reactor surface, various insulation materials of different materials and thicknesses are selected, and corresponding external insulation structures are designed for different areas of the reactor surface. Ultimately, the temperature of the entire reactor surface is maintained at around 300℃, reducing heat loss and achieving the best energy-saving effect. Attached Figure Description

[0011] Figure 1 This is a front view of a high-temperature reactor employing the external insulation structure of this utility model;

[0012] Figure 2 for Figure 1 Sectional view of AA;

[0013] Figure 3 for Figure 2 Enlarged view of region C in the middle;

[0014] Figure 4 for Figure 2 Sectional view of BB;

[0015] Figure 5 for Figure 4 A magnified diagram of region D in the middle.

[0016] In the figure, 1-reaction vessel; 2-cylinder; 3-head; 4-catalyst bed; 5-first insulation material; 6-second insulation material. Detailed Implementation

[0017] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] Please see Figure 1 The high-temperature reactor employing the external insulation structure of this invention includes a cylindrical body 2, end caps 3 connected to both ends of the cylindrical body 2, and a catalyst bed 4 disposed within the cylindrical body 2. Please refer to [link / reference]. Figures 2 to 5 The external insulation structure includes a first insulation material 5 disposed on the outer wall of the reactor 1, another layer of first insulation material 5 is stacked on the first insulation material 5 in the non-bed area of ​​the cylinder 2, and a second insulation material 6 is stacked on the first insulation material 5 in the non-bed area of ​​the head. The thermal insulation performance of the first insulation material 5 is better than that of the second insulation material 6.

[0019] Specifically, taking the high-temperature reactor mentioned above as an example, there is a catalyst bed 4 with a thickness of about 1.5m in the middle of the reactor 1. The heat released during the reaction will cause the temperature of the catalyst bed 4 to rise. Therefore, the outer wall temperature of the cylinder bed area is higher than the outer wall temperature of the non-bed area of ​​the cylinder, and the outer wall temperature of the head bed area is higher than the outer wall temperature of the head non-bed area. The area on the cylinder that is flush with the catalyst bed is defined as the cylinder bed area, and the other areas on the cylinder are defined as the cylinder non-bed area. The area on the head that is flush with the catalyst bed is defined as the head bed area, and the other areas on the head are defined as the head non-bed area.

[0020] Furthermore, after the hot material enters the reactor, it distributes laterally and then flows vertically towards the two end caps 3 on both sides of reactor 1. Due to the impact of the high-temperature material, the outer wall temperature of the end caps 3 is higher than that of the upper and lower parts of the cylinder. Specifically, the area above the bed region of the cylinder is the upper part of the cylinder, and the area below the bed region is the lower part of the cylinder. Because anchoring nails are welded to the inner wall of the end caps 3 to secure the refractory bricks, these anchoring nails increase heat transfer. Since the inner wall of the cylinder 2 does not have these anchoring nails, the temperature of the end caps 3 is generally higher than that of the cylinder 2 (regardless of whether it is the bed region or the non-bed region). In other words, the outer wall temperature of the reactor, from highest to lowest, is: end cap bed region > end cap non-bed region > cylinder bed region > cylinder non-bed region.

[0021] During construction, the reactor 1 is divided into four zones based on its outer wall temperature. Two types of insulation materials, first insulation material 5 and second insulation material 6, are used. The insulation effect of first insulation material 5 is superior to that of second insulation material 6. The first step involves applying an 8mm thick layer of first insulation material 5 to the entire outer wall of the reactor. The second step involves applying a 5mm thick layer of second insulation material 6 to the non-bed areas of the end caps on both sides. The third step involves applying an 8mm thick layer of first insulation material 5 to the non-bed areas of the cylinder. In practical applications, the temperature at the top of the cylinder is approximately 30°C higher than the temperature at the bottom. To simplify the process, the same insulation scheme can be used for both the top and bottom of the cylinder, or the insulation material at the bottom of the cylinder can be appropriately thickened according to actual needs.

[0022] After construction, the high-temperature head bed area has only one layer of 8mm thick first insulation material, while the low-temperature non-bed area of ​​the cylinder has two layers of first insulation material totaling 16mm thick. This achieves the goal of controlling the temperature of the entire reactor shell wall at around 300℃, thereby minimizing heat loss from the reactor and achieving energy-saving effects.

[0023] Optionally, the thickness of the first insulation material 5 is 3-10 mm, and the thickness of the second insulation material 6 is 1-10 mm. In other embodiments of this utility model, the thicknesses of the first and second insulation materials can be adjusted according to reaction requirements.

[0024] In this embodiment, the first insulation material 5 is aerogel felt; the second insulation material 6 is ceramic fiber paper. In other embodiments of this utility model, the materials of the first and second insulation materials can be adjusted according to the reaction requirements.

[0025] This patent claims rights not only for the reactor described herein, but also for other similar high-temperature reactors with uneven temperature distribution.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-temperature reactor external insulation structure, the reactor (1) comprising a cylindrical body (2), end caps (3) connected to both ends of the cylindrical body (2), and a catalyst bed (4) disposed within the cylindrical body (2), characterized in that, The external insulation structure includes a first insulation material (5) set on the outer wall of the reactor (1), another layer of first insulation material (5) is stacked on the first insulation material (5) in the non-bed area of ​​the cylinder, and a second insulation material (6) is stacked on the first insulation material (5) in the non-bed area of ​​the head. The heat insulation performance of the first insulation material (5) is better than that of the second insulation material (6).

2. The external insulation structure for a high-temperature reactor according to claim 1, characterized in that... The thickness of the first insulation material (5) is 3-10mm, and the thickness of the second insulation material (6) is 1-10mm.

3. The external insulation structure for a high-temperature reactor according to claim 2, characterized in that, The thickness of the first insulation material (5) is 8mm, and the thickness of the second insulation material (6) is 5mm.

4. The external insulation structure for a high-temperature reactor according to any one of claims 1-3, characterized in that, The first insulation material (5) is aerogel felt, and the second insulation material (6) is ceramic fiber paper.

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