A test device for fine removal of coal gas

Abstract

This application discloses an experimental apparatus for the fine separation of coal gas, comprising: a reactor, a wall insulation component fixedly installed on the outer wall of the reactor; a temperature equalization component fixedly installed in the inner cavity of the wall insulation component; and an auxiliary heat dissipation mechanism installed on the wall insulation component. The auxiliary heat dissipation mechanism includes an openable and closable sealing cover and a control unit. This application, through the overall technical solution formed by the reactor, the wall insulation component, the temperature equalization component, and the auxiliary heat dissipation mechanism, on the one hand, utilizes the temperature equalization component to eliminate the temperature gradient between the axial and circumferential directions of the reactor, ensuring the uniformity of the temperature field in the reaction zone; on the other hand, utilizes the auxiliary heat dissipation mechanism to break the static insulation equilibrium state, introducing ambient refrigerant for forced convection heat transfer when necessary; and simultaneously utilizes the flow channel inside the temperature equalization component to preheat the unreacted raw coal gas and recover waste heat from the wall, thereby reducing experimental energy consumption.

Description

Technical Field

[0001] This application relates to the technical field of coal gas purification test equipment, and in particular to a test device for coal gas fine separation. Background Technology

[0002] In the coal gasification and coking industries, hydrogen sulfide and organic sulfur in coal gas not only corrode pipelines and equipment, but also produce sulfur dioxide after combustion, causing environmental pollution. Therefore, the development of efficient coal gas desulfurization technology and corresponding catalysts / adsorbents is a key focus of industry research. In the technology research and development stage, it is usually necessary to use experimental devices to simulate industrial conditions and test the sulfur capacity, reaction rate and stability of desulfurization materials.

[0003] Existing coal gas desulfurization test equipment typically includes a pretreatment unit, a heating unit, and a fixed-bed reactor. Among these, the reactor, as the core reaction site, directly determines the reliability of the experimental data through the accuracy and stability of its temperature control.

[0004] Since desulfurization reactions are mostly exothermic and often require simulation of variable operating conditions during the experiment, significant heat fluctuations will occur inside the reactor. In order to maintain the reaction temperature, existing technologies usually set up a heat insulation layer on the outer wall of the reactor. However, the experimental device needs to frequently switch between different stages such as heating, constant temperature, and cooling. When relying solely on the heat insulation structure, the wall surface has a large thermal inertia and the temperature drop rate is uncontrollable, making it difficult to meet the experimental requirements for rapid cooling.

[0005] In other words, existing technologies have the following technical problems: ordinary reaction devices struggle to effectively control the wall temperature. Therefore, an experimental device for the fine separation of coal gas is proposed to address these issues. Utility Model Content

[0006] This application provides a test apparatus for the fine separation of coal gas to solve the problem that conventional reaction apparatuses in the prior art have difficulty in effectively controlling the wall temperature.

[0007] According to one aspect of this application, a test apparatus for gas fine separation is provided, comprising: The reactor has a wall insulation component fixedly installed on its outer wall. A temperature equalization component is also fixedly installed in the inner cavity of the wall insulation component, and the temperature equalization component is fixedly connected to the outer wall of the reactor. The wall insulation component is also equipped with an auxiliary heat dissipation mechanism, which includes an openable and closable sealing cover and a control unit.

[0008] Furthermore, the wall insulation component includes an insulation shell and an insulation layer; The heat-insulating outer shell is fixedly installed on the outer wall of the reactor, forming a closed annular heat-insulating chamber; An insulation layer is fixedly installed on the inner wall of the insulation shell.

[0009] Furthermore, the temperature distribution assembly includes a temperature distribution sleeve, temperature distribution fins, and heat pipes; The temperature equalization sleeve is wrapped and fixed to the outer wall of the reactor.

[0010] Furthermore, several heat-equalizing fins are fixedly connected to the arc-shaped outer wall of the heat-equalizing sleeve, and the heat-equalizing fins are distributed in a ring array. The uniform temperature fins extend in a vertical, sheet-like shape along the reactor axis.

[0011] Furthermore, a heat-conducting pipe is fixedly connected to the temperature-equalizing fin, and the heat-conducting pipe is spirally wound and fixed to the temperature-equalizing fin.

[0012] Furthermore, a medium output end is provided at one end of the heat pipe, and a medium input end is provided at the other end of the heat pipe.

[0013] Furthermore, air vents are provided on both the upper and lower side walls of the insulation shell, forming a vertically connected airflow channel.

[0014] Furthermore, the sealing cover is rotatably connected to the outer wall of the insulation shell via a hinge, forming a flip-opening and closing structure.

[0015] Furthermore, a control unit is connected to the outer wall of the sealing cover. The control unit includes a first connecting rod and an adjusting ring. One end of the first connecting rod is fixedly connected to the outer wall of the sealing cover, and the other end of the first connecting rod is rotatably connected to a second connecting rod. An adjusting ring is slidably connected to the outer wall of the heat-insulating shell, and the adjusting ring is rotatably connected to one end of the second connecting rod.

[0016] Furthermore, a push plate is fixedly connected to the side of the adjusting ring, one end of which is fixedly connected to one end of an electric push rod, and the other end of the electric push rod is fixedly connected to the outer wall of the insulation shell.

[0017] To address the technical problem in existing technologies where the reactor insulation structure of conventional experimental devices only provides unidirectional insulation, leading to heat accumulation and uncontrolled wall temperature due to the exothermic desulfurization reaction, thus affecting the accuracy of adsorbent sulfur capacity data, this application designs a reactor experimental structure that combines insulation, temperature equalization, and active heat dissipation. The overall technical solution, formed by the reactor, wall insulation components, temperature equalization components, and auxiliary heat dissipation mechanism, eliminates the axial and circumferential temperature gradients in the reactor using the temperature equalization components, ensuring the uniformity of the temperature field within the reaction zone. Simultaneously, the auxiliary heat dissipation mechanism breaks the static insulation equilibrium, introducing ambient refrigerant for forced convection heat transfer when necessary. Furthermore, the internal flow channels of the temperature equalization components preheat the unreacted raw gas and recover residual heat from the wall, thereby reducing experimental energy consumption. This design is particularly suitable for temperature-variable adsorption, reaction kinetic testing, and adsorbent screening and evaluation in coal gas desulfurization processes. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of one embodiment of this application; Figure 2 This is a front view structural diagram of one embodiment of this application; Figure 3 This is a schematic diagram of the internal structure of a wall insulation component according to an embodiment of this application; Figure 4 This is a cross-sectional structural diagram of a wall insulation component according to an embodiment of this application; Figure 5 This is a schematic diagram of the structure of a temperature equalization component according to an embodiment of this application; Figure 6 This is one embodiment of the present application. Figure 1 A magnified structural diagram of point A; Figure 7 This is a schematic diagram showing the connection between the heating module and the pretreatment module according to one embodiment of this application.

[0020] In the picture: 1. Reactor; 2. Support base; 3. Wall insulation components; 301. Insulation shell; 302. Insulation layer; 303. Vent; 4. Temperature equalization assembly; 401. Temperature equalization sleeve; 402. Temperature equalization fins; 403. Heat pipe; 404. Medium output end; 405. Medium input end; 5. Auxiliary heat dissipation mechanism; 501. Sealing cover plate; 502. Mounting hinge; 503. First connecting rod; 504. Second connecting rod; 505. Adjusting ring; 506. Push plate; 507. Electric push rod; 6. Heating module; 7. Preprocessing module. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0022] Please see Figure 1 and Figure 2 The experimental apparatus shown includes: Reactor 1, with a wall insulation component 3 fixedly installed on the outer wall of reactor 1, is used to reduce radial heat loss of reactor 1 under constant temperature conditions and maintain stable temperature in the reaction zone. A temperature equalization component 4 is also fixedly installed in the inner cavity of the wall insulation component 3. The temperature equalization component 4 is fixedly connected to the outer wall of the reactor 1 to form a tight heat conduction contact interface, which is used to conduct heat from the local high temperature area of ​​the reactor 1 wall to the low temperature area. The wall insulation component 3 is also equipped with an auxiliary heat dissipation mechanism 5, which includes an openable and closable sealing cover 501 and a control unit. It is used to change the sealed state of the wall insulation component 3 under high temperature conditions or cooling stage, establish a gas convection channel, and realize controlled heat dissipation and cooling of the reactor 1 wall.

[0023] This application presents an integrated technical solution consisting of a reactor 1, a wall insulation component 3, a temperature equalization component 4, and an auxiliary heat dissipation mechanism 5. On the one hand, the temperature equalization component 4 eliminates the axial and circumferential temperature gradients in the reactor 1, ensuring the uniformity of the temperature field within the reaction zone. On the other hand, the auxiliary heat dissipation mechanism 5 breaks the static insulation equilibrium state, introducing ambient refrigerant for forced convection heat transfer when necessary. Simultaneously, the flow channels inside the temperature equalization component 4 preheat the unreacted raw material gas and recover residual heat from the wall, thereby reducing experimental energy consumption. This solution is particularly suitable for temperature-variable adsorption, reaction kinetic testing, and adsorbent screening and evaluation in coal gas desulfurization processes.

[0024] For specific technical solutions, please refer to Figure 7As shown, the experimental apparatus also includes a heating module 6 and a pretreatment module 7. The pretreatment module 7, the heating module 6 and the reactor 1 are connected in series through pipelines to form a complete gas purification test circuit.

[0025] Specifically, the pretreatment module 7 is a filtration and washing unit used to remove tar, dust and free water from the raw coal gas and to adjust the coal gas pressure to the test set value.

[0026] Heating module 6 is a tubular electric heating furnace or electric heating belt, used to heat the pretreated room temperature coal gas to the initial reaction temperature. During the experiment, the pretreatment module 7 is first turned on to stabilize the flow rate and composition of the raw coal gas so that the impurity content entering the system meets the test requirements. Then, the coal gas to be reacted is heated by heating module 6 to reach the set reaction inlet temperature. After that, it is introduced into reactor 1, where the hydrogen sulfide gas is removed through the adsorbent bed inside reactor 1.

[0027] In a preferred embodiment of this application, see [reference] Figure 2 and Figure 3 As shown, a support base 2 is fixedly connected to the outer wall of the reactor 1. The support base 2 is used to fix the reactor 1 and maintain its axial horizontal or vertical installation posture; the wall insulation component 3 includes an insulation shell 301 and an insulation layer 302. The heat-insulating outer shell 301 is fixedly installed on the outer wall of the reactor 1 to form a closed annular heat-insulating chamber.

[0028] An insulation layer 302 is fixedly installed on the inner wall of the insulation shell 301.

[0029] Furthermore, the insulation layer 302 is made of aluminum silicate fiber felt or aerogel composite material, which is used to block the thermal radiation and thermal convection between the reactor 1 and the external environment. Through this technical solution, the insulation layer 302 can effectively reduce the maintenance power of the heating module 6, thereby reducing the energy consumption during the experiment and maintaining the stability of the reaction zone temperature.

[0030] In a preferred embodiment of this application, see [reference] Figure 4 and Figure 5 As shown, the temperature equalization assembly 4 includes a temperature equalization sleeve 401, temperature equalization fins 402, and a heat pipe 403; The uniform temperature sleeve 401 is fixed to the outer wall of the reactor 1. The uniform temperature sleeve 401 is located in the annular gap between the heat insulation shell 301 and the reactor 1, which is used to expand the heat exchange area and equalize the circumferential temperature distribution.

[0031] Several heat-equalizing fins 402 are fixedly connected to the arc-shaped outer wall of the heat-equalizing sleeve 401, and the heat-equalizing fins 402 are arranged in a ring array. The uniform temperature fin 402 extends in a vertical sheet shape along the axial direction of reactor 1.

[0032] Through this technical solution, the uniform temperature sleeve 401 and the uniform temperature fins 402 can quickly guide the excessive heat in the local area of ​​the reactor 1 to the low temperature area, thereby reducing the temperature difference between the axial and circumferential directions of the reactor 1 and improving the temperature uniformity of the bed.

[0033] Specifically, both the temperature equalization sleeve 401 and the temperature equalization fins 402 are made of high thermal conductivity metal materials, such as copper or aluminum alloy, which play a role in reducing thermal resistance and accelerating the thermal equilibrium process.

[0034] In one specific embodiment of this application, see [reference]. Figure 5 As shown, a heat pipe 403 is also fixedly connected to the heat-spreading fin 402. The heat pipe 403 is spirally wound and fixed to the heat-spreading fin 402, serving as a channel for the flow of heat exchange medium and playing a role in further enhancing heat exchange efficiency.

[0035] Furthermore, one end of the heat pipe 403 is provided with a medium output end 404, and the other end of the heat pipe 403 is provided with a medium input end 405, which is used to connect to an external medium circulation system or a raw material gas pipeline.

[0036] With this technical solution, when it is necessary to assist in cooling or fine-tune the temperature of reactor 1, a heat exchange medium can be introduced into the heat pipe 403 to quickly remove the heat of reaction. Alternatively, the raw material cold gas that has passed through the pretreatment module 7 can be introduced into the heat pipe 403 to preheat the raw material gas using the waste heat of reactor 1.

[0037] Furthermore, in order to establish a natural convection heat dissipation channel, see [reference needed]. Figure 3 and Figure 4 As shown, air vents 303 are provided on both the upper and lower side walls of the heat insulation shell 301.

[0038] The air vents 303 on the upper and lower sides form an airflow channel that runs vertically through the annular chamber, allowing ambient air to flow from bottom to top through the chamber when the auxiliary heat dissipation mechanism 5 is turned on.

[0039] With the above technical solution, when the wall temperature of reactor 1 is too high, the air vent 303 can be opened. Through the chimney effect, cold air from the outside can enter through the air vent 303 at the bottom, while hot air can be discharged through the air vent 303 at the top, which can accelerate the heat dissipation of the wall and achieve passive cooling without the need for an external power fan.

[0040] In a preferred embodiment of this application, see [reference] Figure 1 and Figure 6As shown, the sealing cover 501 is rotatably connected to the outer wall of the insulation shell 301 via the mounting hinge 502, forming a flip-open and closeable structure. The sealing cover 501 is used to cover or expose the air vent 303, thereby controlling the opening and closing of the airflow channel.

[0041] Further, see Figure 6 As shown, a control unit is connected to the outer wall of the sealing cover plate 501. The control unit includes a first connecting rod 503 and an adjusting ring 505. One end of the first connecting rod 503 is fixedly connected to the outer wall of the sealing cover plate 501, and the other end of the first connecting rod 503 is rotatably connected to a second connecting rod 504.

[0042] An adjusting ring 505 is slidably connected to the outer wall of the heat-insulating shell 301, and the adjusting ring 505 is rotatably connected to one end of the second connecting rod 504.

[0043] Furthermore, a push plate 506 is fixedly connected to the side of the adjusting ring 505, one end of the push plate 506 is fixedly connected to one end of the electric push rod 507, and the other end of the electric push rod 507 is fixedly connected to the outer wall of the heat insulation shell 301, forming a linear drive mechanism.

[0044] With this technical solution, when it is necessary to maintain the heat preservation state, the electric push rod 507 can be retracted, the adjusting ring 505 can be pulled to reset, and the sealing cover plate 501 can be driven to close the air hole 303, thereby blocking the airflow channel. When auxiliary heat dissipation is required, the electric push rod 507 can be extended, which in turn pushes the adjusting ring 505 to move, causing the sealing cover 501 to flip open, so that the air vents 303 on the heat insulation shell 301 are exposed to the environment, which plays the role of using the ambient cold air to cool the wall of the reactor 1.

[0045] By setting up the auxiliary heat dissipation mechanism 5, it is possible to switch between the two working modes of heat preservation and heat dissipation, thereby realizing the rapid adjustment of the wall temperature of reactor 1 and solving the problem that a single heat preservation structure cannot adapt to the fluctuation of exothermic reaction conditions.

[0046] The circuits, electronic components, and modules involved are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this application does not involve any improvement to the software and methods.

[0047] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A test apparatus for the fine separation of coal gas, characterized in that: include: The reactor (1) is provided with a wall insulation component (3) fixedly installed on the outer wall of the reactor (1). A temperature equalization component (4) is also fixedly installed in the inner cavity of the wall insulation component (3), and the temperature equalization component (4) is fixedly connected to the outer wall of the reactor (1). The wall insulation component (3) is also provided with an auxiliary heat dissipation mechanism (5), which includes an openable and closable sealing cover (501) and a control unit.

2. The experimental apparatus for gas separation according to claim 1, characterized in that: The wall insulation component (3) includes an insulation shell (301) and an insulation layer (302); The heat-insulating shell (301) is fixedly installed on the outer wall of the reactor (1) to form a closed annular heat-insulating chamber; An insulation layer (302) is fixedly provided on the inner wall of the insulation shell (301).

3. The experimental apparatus for gas separation according to claim 1, characterized in that: The temperature equalization component (4) includes a temperature equalization sleeve (401), temperature equalization fins (402), and a heat pipe (403). The temperature equalization sleeve (401) is wrapped and fixed to the outer wall of the reactor (1).

4. The experimental apparatus for gas separation according to claim 3, characterized in that: A plurality of temperature equalization fins (402) are fixedly connected to the arc-shaped outer wall of the temperature equalization sleeve (401), and the plurality of temperature equalization fins (402) are arranged in a ring array. The uniform temperature fins (402) extend in a vertical sheet shape along the axial direction of the reactor (1).

5. The experimental apparatus for gas separation according to claim 4, characterized in that: A heat-conducting pipe (403) is also fixedly connected to the temperature-equalizing fin (402), and the heat-conducting pipe (403) is spirally wound and fixed to the temperature-equalizing fin (402).

6. The experimental apparatus for gas separation according to claim 5, characterized in that: One end of the heat pipe (403) is provided with a medium output end (404), and the other end of the heat pipe (403) is provided with a medium input end (405).

7. The experimental apparatus for gas separation according to claim 2, characterized in that: The heat-insulating shell (301) has air holes (303) on both the upper and lower side walls, and the air holes (303) on the upper and lower sides form an airflow channel that runs through the upper and lower sides.

8. The experimental apparatus for gas separation according to claim 7, characterized in that: The sealing cover (501) is rotatably connected to the outer wall of the heat insulation shell (301) via a mounting hinge (502) to form a flip-opening and closing structure.

9. The experimental apparatus for gas separation according to claim 8, characterized in that: A control unit is connected to the outer wall of the sealing cover (501). The control unit includes a first connecting rod (503) and an adjusting ring (505). One end of the first connecting rod (503) is fixedly connected to the outer wall of the sealing cover (501), and the other end of the first connecting rod (503) is rotatably connected to a second connecting rod (504). An adjusting ring (505) is slidably connected to the outer wall of the heat-insulating shell (301), and the adjusting ring (505) is rotatably connected to one end of the second connecting rod (504).

10. The experimental apparatus for gas separation according to claim 9, characterized in that: A push plate (506) is fixedly connected to the side of the adjusting ring (505). One end of the push plate (506) is fixedly connected to one end of an electric push rod (507). The other end of the electric push rod (507) is fixedly connected to the outer wall of the heat insulation shell (301).

Images