A heating device for a crude benzene hydrogenation reaction system

Abstract

This utility model discloses a heating device for a crude benzene hydrogenation reaction system, comprising a shell and a jacket disposed on the outer wall of the shell. The shell is vertically arranged. The top of the jacket has a feed inlet, and the bottom of the jacket has a connecting hole communicating with the interior of the shell. The top of the shell has a discharge outlet. A hollow shaft is concentrically arranged inside the shell, and a motor is disposed at the bottom of the shell. The output shaft of the motor extends into the shell and connects to the lower end of the hollow shaft. A central heating element is disposed inside the hollow shaft. Several annular plates are arranged vertically at intervals inside the shell, with a flow channel between the inner side of the annular plates and the hollow shaft. The annular plates divide the interior of the shell into multiple heating spaces. Each heating space has several peripheral heating elements evenly distributed around its circumference. The heating elements in each heating space can operate independently. A stirring paddle is disposed on the hollow shaft in each heating space. In summary, this utility model has the advantages of uniform heating, good temperature control, and low heat loss.

Description

Technical Field

[0001] This utility model relates to the technical field of heating equipment for benzene hydrogenation systems, specifically to a heating device for a crude benzene hydrogenation reaction system. Background Technology

[0002] The heating device of the crude benzene hydrogenation reaction system is a key piece of equipment in the crude benzene refining process. It is mainly used to provide suitable temperature conditions for the hydrogenation reaction, heating the crude benzene and hydrogen to the temperature required for the reaction, usually 300℃~400℃, and compensating for heat loss during the reaction process. This ensures that hydrodesulfurization, denitrification, olefin saturation and other processes are carried out efficiently, and also ensures the activity of the catalyst.

[0003] In crude benzene hydrogenation reaction systems, tubular heaters are typically used to heat the gas-liquid mixture of crude benzene and hydrogen. These heaters usually use coal gas as fuel, heating the medium inside the tubes through the heat generated from fuel combustion. This heating method consumes a large amount of coal gas and produces a significant amount of flue gas, increasing the load on waste gas treatment and causing environmental pollution. Although some heaters now use electric heating, they generally suffer from uneven heating, difficulty in temperature control, poor heating effect, and significant heat loss, which are detrimental to the long-term stable operation of the crude benzene hydrogenation reaction system. Therefore, developing a heating device for crude benzene hydrogenation reaction systems that provides uniform heating, good temperature control, and minimal heat loss is objectively necessary. Utility Model Content

[0004] The purpose of this invention is to provide a heating device for a crude benzene hydrogenation reaction system that provides uniform heating, good temperature control, and minimal heat loss.

[0005] The purpose of this utility model is achieved as follows: it includes a shell and a jacket disposed on the outer wall of the shell. The shell is vertically arranged. The top of the jacket is provided with a feed port, and the bottom of the jacket is provided with a connecting hole communicating with the interior of the shell. The top of the shell is provided with a discharge port. A hollow shaft is concentrically arranged inside the shell. The upper end of the hollow shaft is rotatably connected to the shell. A motor is disposed at the bottom of the shell. The output shaft of the motor extends into the shell and is connected to the lower end of the hollow shaft. A central heating element is disposed inside the hollow shaft. Several annular plates are arranged vertically and vertically inside the shell. A flow channel is left between the inner side of the annular plates and the hollow shaft. The annular plates divide the interior of the shell into multiple heating spaces. Several peripheral heating elements are evenly distributed around the circumference of each heating space. The heating elements in each heating space can operate independently. A stirring paddle is disposed on the hollow shaft in each heating space.

[0006] Furthermore, a spiral guide plate is provided on the outer wall of the shell inside the jacket.

[0007] Furthermore, several annular heat-conducting plates are provided on the outer wall of the shell inside the jacket.

[0008] Furthermore, heat-conducting blocks are provided on the surrounding heating elements.

[0009] Furthermore, a baffle is installed on the hollow shaft at the bottom of each heating space.

[0010] Furthermore, a heat radiation reflective film and a heat insulation layer are sequentially arranged on the outer wall of the jacket from the inside to the outside.

[0011] Furthermore, a thermocouple is installed in each heating space.

[0012] Furthermore, a drain port is provided at the bottom of the casing.

[0013] This invention is used for heating materials in a crude benzene hydrogenation reaction system. In use, the central heating element and the surrounding heating element are activated to preheat the temperature inside the shell. The gas-liquid mixture of crude benzene and hydrogen to be heated enters the jacket through the feed port. The gas-liquid mixture flows from top to bottom inside the jacket, and then enters the shell through the connecting hole at the bottom of the jacket. Inside the shell, it flows from bottom to top and passes through each heating space in sequence, completing the heating in each heating space. Finally, it is discharged from the discharge port at the top of the shell. In this invention, a gas-liquid mixture of crude benzene and hydrogen flows upward within the shell. During this flow, both the central heating element and the surrounding heating elements within the shell simultaneously heat the gas-liquid mixture. This simultaneous heating from both the center and periphery of the shell results in better heating efficiency and more uniform heating. Simultaneously, the motor is activated, driving the hollow shaft to rotate, which in turn drives the stirring paddle. The stirring paddle agitates the gas-liquid mixture, causing it to swirl within the shell. This constant flow of the gas-liquid mixture ensures more uniform heating and a better heating effect. Furthermore, this invention includes independently operable surrounding heating elements within each heating space. In actual operation, the heating power of the surrounding heating elements gradually increases from bottom to top, meaning the heating temperature of each heating space gradually increases from bottom to top, achieving gradual heating of the gas-liquid mixture. This improves the heating efficiency of the gas-liquid mixture. Furthermore, by controlling and adjusting the heating temperature within each heating space, precise temperature control of the gas-liquid mixture can be achieved, resulting in good temperature control. Additionally, in this invention, the new gas-liquid mixture enters the jacket from the top and then into the shell. During its flow within the jacket, it absorbs heat emitted from the shell. This heat can be used to preheat the gas-liquid mixture, and it also reduces heat waste and loss, improving heat utilization. In summary, this invention has the advantages of uniform heating, good temperature control, and low heat loss. Attached Figure Description

[0014] Figure 1This is a schematic diagram of the overall structure of this utility model; In the diagram: 1-shell, 2-jacket, 3-inlet, 4-connecting hole, 5-outlet, 6-hollow shaft, 7-motor, 8-central heating element, 9-ring plate, 10-surround heating element, 11-stirring paddle, 12-spiral guide plate, 13-ring heat-conducting plate, 14-heat-conducting block, 15-baffle plate, 16-heat radiation reflective film, 17-insulation layer, 18-thermocouple, 19-drain. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings, but this description is not intended to limit the present invention in any way. Any changes or improvements made based on the present invention shall fall within the protection scope of the present invention.

[0016] like Figure 1 As shown, this utility model includes a housing 1 and a sleeve 2 disposed on the outer wall of the housing 1. The housing 1 is vertically arranged. The top of the sleeve 2 is provided with a feed inlet 3, and the bottom of the sleeve 2 is provided with a communicating hole 4 communicating with the interior of the housing 1. The top of the housing 1 is provided with a discharge outlet 5. A hollow shaft 6 is concentrically arranged inside the housing 1. The upper end of the hollow shaft 6 is rotatably connected to the housing 1. A motor 7 is disposed at the bottom of the housing 1. The output shaft of the motor 7 extends into the housing 1 and is connected to the lower end of the hollow shaft 6. A central heating element 8 is disposed inside the hollow shaft 6. The housing 1 has several annular plates 9 spaced vertically inside, with a flow channel between the inner side of the annular plates 9 and the hollow shaft 6. The annular plates 9 divide the interior of the housing 1 into multiple heating spaces. Each heating space has several peripheral heating elements 10 evenly distributed around its circumference. The peripheral heating elements 10 in each heating space can operate independently, and the heating temperature in each heating space can be controlled individually. Each hollow shaft 6 in each heating space is equipped with a stirring paddle 11. The stirring paddle 11 is existing technology and is used to stir the gas-liquid mixture in the heating space. In this invention, both the central heating element 8 and the peripheral heating elements 10 are existing heating elements, and a resistance heating structure can be used to heat the gas-liquid mixture inside the housing 1.

[0017] This invention is used for heating materials in a crude benzene hydrogenation reaction system. In use, the central heating element 8 and the surrounding heating element 10 are activated to preheat the temperature inside the shell 1. The gas-liquid mixture of crude benzene and hydrogen to be heated enters the jacket 2 through the feed port 3. The gas-liquid mixture flows from top to bottom in the jacket 2, and then enters the shell 1 through the connecting hole 4 at the bottom of the jacket 2. It flows from bottom to top in the shell 1, passing through each heating space in sequence, and completing the heating in each heating space. Finally, it is discharged from the discharge port 5 at the top of the shell 1.

[0018] In this invention, a gas-liquid mixture of crude benzene and hydrogen flows upward within the shell 1. During this flow, the central heating element 8 and the surrounding heating elements 10, located within the shell 1, simultaneously heat the gas-liquid mixture. Heating from both the center and periphery of the shell 1 results in better heating efficiency and more uniform heating. Simultaneously, the motor 7 is activated, driving the hollow shaft 6 to rotate. The hollow shaft 6 then drives the stirring paddle 11 to rotate, agitating the gas-liquid mixture and causing it to swirl within the shell 1. This constant flow of the gas-liquid mixture ensures more uniform heating and a better heating effect. Furthermore, this invention includes independently operable surrounding heating elements in each heating space. In actual operation, element 10 causes the heating power of the surrounding heating elements 10 to gradually increase from bottom to top, that is, the heating temperature of each heating space gradually increases from bottom to top, realizing the gradual heating of the gas-liquid mixture. This can not only improve the heating efficiency of the gas-liquid mixture, but also achieve precise control of the heating temperature of the gas-liquid mixture by controlling and adjusting the heating temperature in each heating space, resulting in a good temperature control effect. In addition, in this utility model, the new gas-liquid mixture enters the jacket 2 from the top and then enters the shell 1. During the flow process in the jacket 2, it can absorb the heat emitted from the shell 1. On the one hand, this heat can be used to preheat the gas-liquid mixture, and on the other hand, it can reduce heat waste and loss, and improve the heat utilization rate.

[0019] A spiral guide plate 12 is provided on the outer wall of the shell 1 inside the jacket 2. The spiral guide plate 12 forms a spiral channel inside the jacket 2, and the gas-liquid mixture flows in the spiral channel, eliminating dead flow angles and improving heat exchange efficiency.

[0020] Several annular heat-conducting plates 13 are provided on the outer wall of the shell 1 inside the jacket 2. The annular heat-conducting plates 13 are used to conduct the heat emitted by the shell 1 and improve the heating efficiency of the gas-liquid mixture.

[0021] A heat-conducting block 14 is provided on the ambient heating element 10. The heat-conducting block 14 is made of a material with good thermal conductivity and is used to transfer the heat emitted by the ambient heating element 10, increase the heat exchange area, and improve the heat exchange efficiency.

[0022] Each heating space has a baffle plate 15 installed on the hollow shaft 6 at the bottom. When the present invention is in operation, the gas-liquid mixture flows from bottom to top in the shell 1 and flows into each heating space through the flow channel in sequence. In actual operation, it was found that when the gas-liquid mixture flows into the heating space from the flow channel, some of the gas-liquid mixture flows directly upward and cannot spread to the surroundings, which reduces the heating efficiency of the gas-liquid mixture. In order to solve this problem, the baffle plate 15 is set up to block the gas-liquid mixture from flowing upward, forcing the gas-liquid mixture to change direction and spread to the surroundings, increasing the flow path, so that it can contact the surrounding heating elements 10 and improve the heating efficiency of the gas-liquid mixture.

[0023] A heat radiation reflective film 16 and a heat insulation layer 17 are sequentially arranged on the outer wall of the jacket 2 from the inside to the outside. Both the heat radiation reflective film 16 and the heat insulation layer 17 are existing technologies. The heat radiation reflective film 16 can reflect the heat emitted from the jacket 2 back, improve the heat utilization rate, and reduce heat loss and waste. The heat insulation layer 17 is used to prevent the heat from being lost from the jacket 2.

[0024] Each heating space is equipped with a thermocouple 18, which is a temperature sensor used to monitor the temperature of the gas-liquid mixture in each heating space. This facilitates the adjustment and control of the temperature in each heating space, improves the heating accuracy of the gas-liquid mixture, and prevents insufficient or excessive heating.

[0025] The bottom of the shell 1 is provided with a drain port 19. During the operation of this utility model, the gas-liquid mixture of crude benzene and hydrogen flows from bottom to top in the shell and is heated during the flow. In actual operation, after the heating of the gas-liquid mixture is completed, since no new liquid mixture is introduced, a part will remain in the shell 1 and cannot be discharged, resulting in material waste. Therefore, the drain port 19 is provided to discharge all the material in the shell 1.

Claims

1. A heating device for a crude benzol hydrogenation reaction system, comprising a shell (1) and a jacket (2) arranged on the outer wall of the shell (1), characterized in that: The housing (1) is vertically arranged. The top of the jacket (2) is provided with a feed inlet (3), and the bottom of the jacket (2) is provided with a connecting hole (4) that communicates with the inside of the housing (1). The top of the housing (1) is provided with a discharge outlet (5). A hollow shaft (6) is concentrically arranged inside the housing (1). The upper end of the hollow shaft (6) is rotatably connected to the housing (1). A motor (7) is provided at the bottom of the housing (1). The output shaft of the motor (7) extends into the housing (1) and is connected to the lower end of the hollow shaft (6). A central heating element (8) is provided inside the hollow shaft (6). Several ring plates (9) are arranged vertically and vertically inside the housing (1). A flow channel is left between the inner side of the ring plate (9) and the hollow shaft (6). The ring plate (9) divides the interior of the housing (1) into multiple heating spaces. Several peripheral heating elements (10) are evenly distributed around the circumference of each heating space. The peripheral heating elements (10) in each heating space can operate independently. A stirring paddle (11) is provided on the hollow shaft (6) in each heating space.

2. The heating device for a crude benzene hydrogenation reaction system according to claim 1, characterized in that: A spiral guide plate (12) is provided on the outer wall of the shell (1) inside the jacket (2).

3. The heating device for a crude benzene hydrogenation reaction system according to claim 1, characterized in that: Several annular heat-conducting plates (13) are provided on the outer wall of the shell (1) inside the jacket (2).

4. The heating device for a crude benzene hydrogenation reaction system according to claim 1, characterized in that: A heat-conducting block (14) is provided on the surrounding heating element (10).

5. The heating device for a crude benzene hydrogenation reaction system according to claim 1, characterized in that: Each heating space has a baffle plate (15) installed on the hollow shaft (6) at the bottom.

6. The heating device for a crude benzene hydrogenation reaction system according to claim 1, characterized in that: The jacket (2) is provided with a heat radiation reflective film (16) and a heat insulation layer (17) from the inside to the outside on its outer wall.

7. The heating device for a crude benzene hydrogenation reaction system according to claim 1, characterized in that: Each heating space is equipped with a thermocouple (18).

8. The heating device for a crude benzene hydrogenation reaction system according to claim 1, characterized in that: The bottom of the housing (1) is provided with a drain port (19).

Images