A rapid opening and closing device for the tail gas chimney of a crude benzene tubular furnace

Abstract

This utility model discloses a rapid opening and closing device for a coarse benzene tube furnace tail gas chimney, relating to the field of rapid chimney opening and closing technology. It includes an inlet section, the right end of which is connected to an exhaust section via an installation section. The exhaust section is connected to the chimney body. A butterfly valve is installed at the middle of the inner side of the installation section. The front and rear surfaces of the butterfly valve are rotatably connected to corresponding positions on the installation section via bearings. The rear end of the butterfly valve is connected to a power mechanism. An annular tube is fitted onto the right side of the upper surface of the inlet section. The right side surface of the annular tube is connected at equal angles to the left ends of blowing pipes. The right end of each blowing pipe extends through a circular hole at a corresponding position on the inlet section into the installation section. The left end of the annular tube is connected to an air compressor mechanism. A pressure sensor is installed inside the inlet section. When the valve is opened, high-pressure air is released to the valve body surface. The high-speed airflow reduces the contact between the tail gas and the valve body surface, while the high-pressure gas guides the tail gas to be discharged quickly.

Description

Technical Field

[0001] This utility model relates to the field of rapid chimney opening and closing technology, specifically a rapid opening and closing device for a coarse benzene tube furnace tail gas chimney. Background Technology

[0002] Crude benzene tubular furnace tail gas refers to the waste gas generated after the combustion of coal gas in the tubular heating furnace during the crude benzene distillation process. Crude benzene is a by-product of coal coking production. Washed benzene rich oil needs to be heated in a tubular furnace for crude benzene distillation, refining, and other treatments. The treatment of crude benzene tubular furnace tail gas requires desulfurization and denitrification. It is recommended to send the tail gas to the coke oven flue gas desulfurization and denitrification system for purification to ensure that it meets emission standards. At the same time, the heat of the tail gas is recovered to achieve energy saving.

[0003] Existing exhaust gas chimney ducts are directly connected to the atmosphere. After long-term operation, the valves inside the ducts are prone to having deposits from the exhaust gas adhering to their surfaces. Long-term accumulation may corrode the valve body surface, affecting the airtightness of the valve body. Frequent cleaning of the valve body is required, which is too troublesome. To address this, we propose a rapid opening and closing device for a coarse benzene tube type furnace exhaust gas chimney. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a rapid opening and closing device for the tail gas chimney of a coarse benzene tube furnace. When the valve is opened, high-pressure air is released to the surface of the valve body. The contact between the tail gas and the valve body surface is reduced by the high-speed airflow. At the same time, the tail gas is guided to be discharged quickly by the high-pressure gas, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a rapid opening and closing device for a coarse benzene tube furnace tail gas chimney, comprising an inlet section, the right end of which is connected to an exhaust section via an installation section, the exhaust section being connected to the chimney body, a butterfly valve being installed at the middle of the inner side of the installation section, the front and rear surfaces of the butterfly valve being rotatably connected to corresponding positions on the installation section via bearings, the rear end of the butterfly valve being connected to a power mechanism, an annular tube being sleeved on the right side of the upper surface of the inlet section, the right side surface of the annular tube being connected to the left end of a blowing pipe at equal angles, the right end of each blowing pipe extending through a circular hole opened at a corresponding position on the inlet section into the installation section, the left end of the annular tube being connected to an air compressor mechanism, a pressure sensor being installed inside the inlet section, and the pressure sensor being connected to an external control switch group via an external controller.

[0006] The design incorporates a blowpipe to blow high-pressure air onto the butterfly valve. This high-pressure air forms an air film that isolates most of the exhaust gas, reducing contact between the butterfly valve and the exhaust gas while simultaneously cleaning the valve surface and extending its lifespan. When controlling exhaust gas emission, the power mechanism controls the butterfly valve to rotate, allowing the flue gas to pass through the valve and enter the exhaust section. From there, the flue gas is discharged into the chimney. At this time, a pneumatic compressor generates high-pressure air, which is then introduced into the annular pipe and blown onto the butterfly valve surface through the blowpipe, further reducing contact between the flue gas and the butterfly valve.

[0007] Furthermore, the power mechanism includes a motor, which is fixedly connected to the rear surface of the mounting section. The output shaft of the motor extends through a circular hole at a corresponding position on the mounting section into the interior of the mounting section and is fixedly connected to a butterfly valve. The input end of the motor is electrically connected to the output end of an external power supply through an external control switch group.

[0008] When the air pressure in the intake section exceeds the critical value set by the air pressure sensor, the air pressure sensor sends a signal to the external controller. The external controller then controls the external control switch group to control the motor, thereby driving the butterfly valve to the open state, thus enabling the discharge operation.

[0009] Furthermore, the air compressor mechanism includes an air tank, which is fixedly connected to the upper surface of the air intake section. An air compressor is fixedly connected to the inside of the air tank via a mounting bracket. The input end of the air compressor is electrically connected to the output end of an external power supply via an external control switch group. A circular pipe is connected to the upper end of the air tank, and a filter screen is fixedly connected in the circular pipe. The lower part of the air tank is connected to an annular pipe via a connecting pipe, and a solenoid valve is installed inside the connecting pipe.

[0010] The design incorporates an air compressor to generate high-pressure air. This high-pressure air is then used to clean and protect the surface of the butterfly valve, thereby extending its service life. When the valve is being discharged, the control solenoid valve opens, allowing the high-pressure air produced by the air compressor to enter the annular pipe through the connecting pipe, then through the annular pipe into the blowing pipe, and finally through the blowing pipe onto the surface of the butterfly valve.

[0011] Furthermore, the air compressor mechanism also includes a second solenoid valve, the air outlet of the air compressor is connected to the upper end of the second circular tube, and the lower end of the second circular tube is connected to the corresponding position on the upper surface of the air inlet section.

[0012] When the air pressure in the intake section is insufficient but there is a special situation where it is still necessary to discharge, high-pressure air is injected to increase the air pressure, thereby reaching the standard for discharge. When pressurization is performed, solenoid valve one is closed and solenoid valve two is opened, so that high-pressure air enters the intake section to increase the air pressure.

[0013] Furthermore, the air compressor mechanism also includes a filter screen, which is fixedly connected to the air inlet on the upper side of the air tank.

[0014] The system is designed with filters to filter the incoming air and prevent the buildup of internal impurities.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: This rapid opening and closing device for the tail gas chimney of a crude benzene tube furnace has the following advantages:

[0016] 1. Design an air blowing pipe to blow high-pressure air onto the butterfly valve. The air film formed by the high-pressure air isolates most of the exhaust gas, reducing the contact between the butterfly valve and the exhaust gas while cleaning the surface of the butterfly valve and improving its service life.

[0017] 2. When the air pressure in the intake section is insufficient but there is a special situation where it is still necessary to discharge, the air pressure is increased by injecting high-pressure air, thereby reaching the standard for discharge pressure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a side view of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0021] In the diagram: 1. Intake section; 2. Installation section; 3. Exhaust section; 4. Motor; 5. Butterfly valve; 6. Compressor tank; 7. Mounting bracket; 8. Air compressor; 9. Connecting pipe; 10. Solenoid valve one; 11. Air blowing pipe; 12. Ring pipe; 13. Solenoid valve two; 14. Filter screen; 15. Air pressure sensor. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-3This embodiment provides a technical solution: a rapid opening and closing device for a coarse benzene tube type furnace tail gas chimney, including an air inlet section 1. The right end of the air inlet section 1 is connected to the exhaust section 3 through an installation section 2. The exhaust section 3 is connected to the chimney body. A butterfly valve 5 is installed in the middle of the inner side of the installation section 2. The front and rear surfaces of the butterfly valve 5 are rotatably connected to the corresponding positions on the installation section 2 through bearings. The rear end of the butterfly valve 5 is connected to a power mechanism. An annular tube 12 is sleeved on the right side of the upper surface of the air inlet section 1. The right side surface of the annular tube 12 is connected to the left end of the blowing pipe 11 at equal angles. The right end of each blowing pipe 11 extends into the installation section 2 through a circular hole opened at the corresponding position on the air inlet section 1. The left end of the annular tube 12 is connected to an air compressor mechanism. A pressure sensor 15 is installed inside the air inlet section 1. The pressure sensor 15 is connected to an external control switch group through an external controller.

[0024] The design includes an air blowing pipe 11, which blows high-pressure air onto the butterfly valve 5. The air film formed by the high-pressure air isolates most of the exhaust gas, reducing the contact between the butterfly valve 5 and the exhaust gas while cleaning the surface of the butterfly valve 5 and improving its service life. When the exhaust gas is being controlled, the butterfly valve 5 is rotated by the power mechanism, allowing the flue gas to pass through the butterfly valve 5 and enter the exhaust section 3. The flue gas is then discharged into the chimney body through the exhaust section 3. At this time, high-pressure air is generated by the air compressor and discharged into the annular pipe 12, and then blown onto the surface of the butterfly valve 5 through the air blowing pipe 11, reducing the contact between the flue gas and the butterfly valve 5.

[0025] The power mechanism includes a motor 4, which is fixedly connected to the rear surface of the mounting section 2. The output shaft of the motor 4 extends through a circular hole opened at a corresponding position on the mounting section 2 into the interior of the mounting section 2 and is fixedly connected to a butterfly valve 5. The input end of the motor 4 is electrically connected to the output end of an external power supply through an external control switch group.

[0026] When the air pressure in the intake section 1 exceeds the critical value set by the air pressure sensor 15, the air pressure sensor 15 sends a signal to the external controller. The external controller controls the external control switch group to control the motor 4 to work, thereby driving the butterfly valve 5 to the open state, so as to carry out the discharge work.

[0027] The air compressor mechanism includes an air tank 6. The air tank 6 is fixedly connected to the upper surface of the air inlet section 1. An air compressor 8 is fixedly connected to the inside of the air tank 6 through a fixing bracket 7. The input end of the air compressor 8 is electrically connected to the output end of an external power supply through an external control switch group. The upper end of the air tank 6 is connected to a circular pipe, and a filter screen 14 is fixedly connected in the circular pipe. The lower part of the air tank 6 is connected to an annular pipe 12 through a connecting pipe 9. A solenoid valve 10 is installed inside the connecting pipe 9.

[0028] The air compressor 8 is designed to generate high-pressure air, which is then used to clean and protect the surface of the butterfly valve 5, thereby extending the service life of the butterfly valve 5. When the discharge operation is performed, the solenoid valve 10 is opened, so that the high-pressure air produced by the air compressor 8 enters the annular pipe 12 through the connecting pipe 9, then enters the blowing pipe 11 through the annular pipe 12, and finally blows onto the surface of the butterfly valve 5 through the blowing pipe 11.

[0029] The air compressor mechanism also includes a second solenoid valve 13. The outlet of the air compressor 8 is connected to the upper end of the second circular pipe, and the lower end of the second circular pipe is connected to the corresponding position on the upper surface of the air inlet section 1.

[0030] When the air pressure in intake section 1 is insufficient but discharge is still desired under special circumstances, high-pressure air is injected to increase the air pressure, thereby reaching the discharge pressure standard. When pressurization is performed, control solenoid valve 10 closes and solenoid valve 2 13 opens, thereby allowing high-pressure air to enter intake section 1 and increase the air pressure.

[0031] The air compressor also includes a filter screen 14, which is fixedly connected to the air inlet on the upper side of the air tank 6.

[0032] The filter 14 is designed to filter the incoming air and prevent the accumulation of internal impurities.

[0033] The working principle of the rapid opening and closing device for the tail gas chimney of a coarse benzene tube furnace provided by this utility model is as follows:

[0034] As the required exhaust gas in intake section 1 gradually increases, the internal pressure gradually rises. When the predetermined limit is reached, the pressure sensor 15 is triggered. The pressure sensor 15 sends a signal to the external controller, which controls the external control switch group to control the motor 4 to work, thereby driving the butterfly valve 5 to the open state. At this time, the external control switch group controls the air compressor 8 to generate high-pressure air. The high-pressure air is discharged into the annular pipe 12 and then blown onto the surface of the butterfly valve 5 through the air blowing pipe 11, reducing the contact between the flue gas and the butterfly valve 5. When the air pressure in intake section 1 is insufficient but the situation is special and it is still necessary to discharge, the air pressure is increased by injecting high-pressure air, thereby reaching the discharge pressure standard. When pressurization is performed, the control solenoid valve 10 is closed and the control solenoid valve 2 is opened, thereby allowing high-pressure air to enter intake section 1 to increase the air pressure.

[0035] It is worth noting that in the rapid opening and closing device for the tail gas chimney of a crude benzene tube furnace disclosed in the above embodiments, the pressure sensor 15 adopts the Mico pressure sensor, the air compressor 8 adopts the Dongcheng air compressor, and the operation of the motor 4, air compressor 8, solenoid valve 10 and solenoid valve 213 is controlled by an external control switch group using a method commonly used in the prior art.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A rapid opening and closing device for a crude benzene tubular furnace tail gas chimney, characterized in that: The system includes an intake section (1), the right end of which is connected to an exhaust section (3) via an installation section (2), and the exhaust section (3) is connected to the chimney body. A butterfly valve (5) is installed in the middle of the inner side of the installation section (2). The front and rear surfaces of the butterfly valve (5) are rotatably connected to the corresponding positions on the installation section (2) via bearings. The rear end of the butterfly valve (5) is connected to a power mechanism. An annular tube (12) is fitted onto the right side of the upper surface of the intake section (1). The right side surface of the annular tube (12) is connected to the left end of the blowing pipe (11) at equal angles. The right end of each blowing pipe (11) extends through a circular hole opened at the corresponding position on the intake section (1) into the installation section (2). The left end of the annular tube (12) is connected to an air compressor mechanism. A pressure sensor (15) is installed inside the intake section (1). The pressure sensor (15) is connected to an external control switch group via an external controller.

2. A quick opening and closing device for the tail gas chimney of a benzol pipe still according to claim 1, characterized in that: The power mechanism includes a motor (4), the motor (4) is fixedly connected to the rear surface of the mounting section (2), the output shaft of the motor (4) extends through the round hole opened at the corresponding position on the mounting section (2) to the interior of the mounting section (2), and is fixedly connected to the butterfly valve (5). The input end of the motor (4) is electrically connected to the output end of the external power supply through an external control switch group.

3. A quick opening and closing device for the tail gas chimney of a benzol pipe still according to claim 1, characterized in that: The air compressor mechanism includes an air tank (6), the air tank (6) is fixedly connected to the upper surface of the air inlet section (1), the air compressor (8) is fixedly connected to the inside of the air tank (6) through a fixing bracket (7), the input end of the air compressor (8) is electrically connected to the output end of an external power supply through an external control switch group, the upper end of the air tank (6) is connected to a circular pipe, a filter screen (14) is fixedly connected in the circular pipe, the lower part of the air tank (6) is connected to an annular pipe (12) through a connecting pipe (9), and a solenoid valve (10) is installed inside the connecting pipe (9).

4. The rapid opening and closing device for a crude benzene tubular furnace tail gas chimney according to claim 3, characterized in that: The air compressor mechanism also includes a second solenoid valve (13), the outlet of the air compressor (8) is connected to the upper end of the second round pipe, and the lower end of the second round pipe is connected to the corresponding position on the upper surface of the air inlet section (1).

5. A quick open and close device for the tail gas chimney of a benzol pipe still according to claim 4, characterized in that: The air compressor also includes a filter screen (14), which is fixedly connected to the air inlet on the upper side of the air tank (6).

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