Methanol leakage air interchanger for cracking reactor
Methanol leakage was monitored by electrochemical sensors and a PLC controller. Methanol gas was extracted and condensed by an exhaust fan, which solved the problem of methanol leakage in the cracking reactor and achieved safe ventilation and resource recovery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUIZHOU GUICHUN NEW ENERGY GROUP CO LTD
- Filing Date
- 2025-05-15
- Publication Date
- 2026-04-17
AI Technical Summary
The cracking reactor has gaps at the welded joints, which cause methanol leakage, impacting the environment and making it impossible to recover, resulting in resource waste.
An electrochemical sensor and a PLC controller are used to monitor the methanol concentration, triggering an alarm and an exhaust fan to extract the leaked methanol gas. The liquefied methanol is recovered through a condenser, and the methanol concentration is reduced by purging with inert gas.
It enables timely ventilation and recovery of methanol leaks, avoiding environmental pollution and conserving resources.
Smart Images
Figure CN224127229U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of cracking reactor technology, and in particular to a methanol leakage gas exchange device for cracking reactors. Background Technology
[0002] A pyrolysis reactor is a high-pressure pyrolysis device with catalytic reaction; it is an analytical instrument used in the field of energy science and technology.
[0003] Methanol, also known as hydroxymethane, wood alcohol, or wood spirit, is an organic compound. It is light, highly volatile, colorless, flammable, and has an odor very similar to ethanol (a type of alcoholic beverage). However, unlike ethanol, methanol is highly toxic and should not be consumed.
[0004] During the methanol cracking reaction in the cracking reactor, methanol leakage is prone to occur due to gaps in the welded joints of the gas pipeline. Methanol is toxic, and when methanol gas leaks, it affects the environment around the cracking reactor, which is detrimental to production. At the same time, the leaked methanol cannot be recovered, resulting in a waste of resources. Utility Model Content
[0005] To overcome the existing problems of not being able to ventilate leaked methanol gas and not being able to recover it.
[0006] The technical solution of this utility model is as follows: a methanol leakage and gas exchange device for a cracking reactor, comprising a base, a cracking reactor body mounted on top of the base, a methanol storage tank installed inside the cracking reactor body, an electrochemical sensor mounted on the outside of the methanol storage tank, a sensing head mounted on the side of the electrochemical sensor, the sensing head extending into the chamber of the cracking reactor body, an audible and visual alarm mounted below the electrochemical sensor, and a PLC controller mounted below the audible and visual alarm. Both the electrochemical sensor and the audible and visual alarm are electrically connected to the PLC controller. A first mounting hole is opened on the outside of the cracking reactor body, and the first mounting hole is fixedly connected to a suction pipe. One end of the suction pipe is fixedly connected to an exhaust fan, and an output gas pipe is fixedly connected to the side of the exhaust fan. A second solenoid valve is installed inside the output gas pipe, and the second solenoid valve is electrically connected to the PLC controller.
[0007] Preferably, when a methanol storage tank leaks, methanol gas diffuses into the interior of the cracking reactor. At this time, the sensing head of the electrochemical sensor detects methanol. The electrochemical sensor generates a current signal proportional to the concentration through the oxidation-reduction reaction between methanol and the catalyst on the electrode surface. This current signal is transmitted to the PLC controller. The PLC controller compares and analyzes the signal with a preset threshold. When the detected methanol concentration exceeds the safety limit, the control unit inside the PLC controller immediately triggers the alarm system, causing the audible and visual alarms to sound. At the same time, the PLC controller controls the start of the exhaust fan and closes the first solenoid valve, stopping the supply of methanol to the storage tank. After the exhaust fan extracts the leaked methanol gas from the cracking reactor, the ventilation fan is then started to draw inert gas into the cracking reactor for replacement, thereby achieving the effect of ventilation. This can prevent the methanol gas concentration in the cracking reactor from increasing.
[0008] Preferably, a feed pipe is fixedly connected to the top of the methanol storage tank, and a first solenoid valve is installed inside the feed pipe. The first solenoid valve is electrically connected to the PLC controller.
[0009] Preferably, the exhaust fan is equipped with a first support base at its bottom.
[0010] Preferably, a condenser is fixedly connected to one end of the output gas pipe, and a drain pipe is fixedly connected to the side of the condenser, with a control valve installed inside the drain pipe.
[0011] Preferably, a connecting pipe is welded to the side of the condenser away from the outlet pipe, a filter box is fixedly connected to one end of the connecting pipe, and an exhaust pipe is fixedly connected to the side of the filter box.
[0012] Preferably, a second mounting hole is provided on the side of the pyrolysis reactor body away from the first mounting hole, and a first air inlet pipe is fixedly connected inside the second mounting hole.
[0013] Preferably, a fan is fixedly connected to one end of the first air intake pipe, a second support base is fixedly connected to the bottom of the fan, a second air intake pipe is fixedly connected to the side of the fan, a third solenoid valve is installed inside the second air intake pipe, and the third solenoid valve is electrically connected to the PLC controller.
[0014] The beneficial effects of this utility model are:
[0015] 1. This cracking reactor uses a methanol leak ventilation device. When a methanol storage tank leaks, methanol gas diffuses into the main body of the cracking reactor. At this time, the sensing head of the electrochemical sensor detects methanol. The electrochemical sensor generates a current signal proportional to the concentration through the oxidation-reduction reaction between methanol and the catalyst on the electrode surface. This current signal is transmitted to the PLC controller. The PLC controller compares and analyzes the signal with a preset threshold. When the detected methanol concentration exceeds the safety limit, the control unit inside the PLC controller immediately triggers the alarm system, causing the audible and visual alarms to sound. At the same time, the PLC controller controls the start of the exhaust fan and closes the first solenoid valve, stopping the supply of methanol to the methanol storage tank. After the exhaust fan extracts the leaked methanol gas from the main body of the cracking reactor, the exhaust fan is then started to draw inert gas into the main body of the cracking reactor for replacement, thereby achieving the effect of ventilation. This can prevent the methanol gas concentration in the main body of the cracking reactor from increasing.
[0016] 2. The pyrolysis reactor uses a methanol leakage gas exchange device. After the exhaust fan extracts the methanol gas leaking from the main body of the pyrolysis reactor, it is then transported to the condenser. The condenser is set to minus 20 degrees Celsius, which allows the methanol gas to be quickly liquefied and discharged and collected through the drain pipe, thereby achieving the effect of resource recovery.
[0017] 3. The pyrolysis reactor uses a methanol leakage gas exchange device. By setting up a filter box, a small amount of unliquefied methanol gas in the condenser is purified by passing through the activated carbon layer in the filter box. In this way, the purified gas can be directly discharged into the atmosphere, thereby achieving the effect of protecting the environment. Attached Figure Description
[0018] Figure 1 The image shown is a three-dimensional front view of the methanol leakage ventilation device for the pyrolysis reactor of this utility model.
[0019] Figure 2 The image shown is a cross-sectional view of the main body of the pyrolysis reactor for the methanol leakage ventilation device of the pyrolysis reactor of this utility model.
[0020] Figure 3 The diagram shown is a schematic of the extraction and recovery mechanism of the methanol leakage exchange device for the pyrolysis reactor of this utility model.
[0021] Figure 4 The image shown is a right-side perspective view of the methanol leakage ventilation device for the pyrolysis reactor of this utility model.
[0022] Figure 5 The left-side perspective view shows the three-dimensional structure of the methanol leakage ventilation device for the pyrolysis reactor of this utility model.
[0023] Explanation of reference numerals in the attached drawings: 1. Base; 2. Main body of the cracking reactor; 3. Methanol storage tank; 4. Feed pipe; 5. First solenoid valve; 6. Electrochemical sensor; 7. Sensing head; 8. Audible and visual alarm; 9. PLC controller; 10. First mounting hole; 11. Exhaust pipe; 12. Exhaust fan; 13. First support base; 14. Output gas pipe; 15. Second solenoid valve; 16. Condenser; 17. Drain pipe; 18. Control valve; 19. Connecting pipe; 20. Filter box; 21. Exhaust pipe; 22. Second mounting hole; 23. First air inlet pipe; 24. Exhaust fan; 25. Second support base; 26. Second air inlet pipe; 27. Third solenoid valve. Detailed Implementation
[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0025] Please see Figures 1-5 This utility model provides an embodiment of a methanol leakage ventilation device for a cracking reactor, comprising a base 1, a cracking reactor body 2 mounted on top of the base 1, a methanol storage tank 3 installed inside the cracking reactor body 2, an electrochemical sensor 6 mounted on the outside of the methanol storage tank 3, a sensing head 7 mounted on the side of the electrochemical sensor 6, the sensing head 7 extending into the chamber of the cracking reactor body 2, an audible and visual alarm 8 mounted below the electrochemical sensor 6, and a PLC controller 9 mounted below the audible and visual alarm 8, both of which are electrically connected to the PLC controller 9. A first mounting hole 10 is provided on the outside of the cracking reactor body 2, and the first mounting hole 10 is fixedly connected to a suction pipe 11. One end of the suction pipe 11 is fixedly connected to an exhaust fan 12, and an output gas pipe 14 is fixedly connected to the side of the exhaust fan 12, the output gas... The second solenoid valve 15 is installed inside the pipe 14. The second solenoid valve 15 is electrically connected to the PLC controller 9. The methanol in the methanol storage tank 3 can be reacted through the cracking reactor body 2. The methanol storage tank 3 is used to store methanol. The electrochemical sensor 6 can generate a current signal proportional to the concentration by reacting methanol with the catalyst on the electrode surface of the sensing head 7. The current signal is transmitted to the PLC controller 9 for operation. The PLC controller 9 is used to control the audible and visual alarm 8 to perform audible and visual alarms. At the same time, it can control the start of three sets of solenoid valves. The first mounting hole 10 is used to fix the exhaust pipe 11. The exhaust pipe 11 extracts the methanol gas in the cracking reactor body 2 and extracts it into the output gas pipe 14 through the exhaust fan 12. Then, it is output to the condenser 16 for condensation treatment through the output gas pipe 14.
[0026] Please see Figure 2In this embodiment, a feed pipe 4 is fixedly connected to the top of the methanol storage tank 3. A first solenoid valve 5 is installed inside the feed pipe 4. The first solenoid valve 5 is electrically connected to the PLC controller 9. The feed pipe 4 is used to transport methanol material into the methanol storage tank 3 for reaction. The first solenoid valve 5 is used to control the feed rate of the material.
[0027] Please see Figure 3 In this embodiment, a first support base 13 is installed at the bottom of the exhaust fan 12, a condenser 16 is fixedly connected to one end of the output gas pipe 14, a drain pipe 17 is fixedly connected to the side of the condenser 16, and a control valve 18 is installed inside the drain pipe 17; a connecting pipe 19 is welded to the side of the condenser 16 away from the output gas pipe 14, a filter box 20 is fixedly connected to one end of the connecting pipe 19, an exhaust pipe 21 is fixedly connected to the side of the filter box 20, the first support base 13 is used to install the exhaust fan 12, the condenser 16 is set to minus 20 degrees Celsius to liquefy methanol gas and discharge and collect the liquefied methanol, the drain pipe 17 is used to discharge methanol liquid, and the control valve 18 is used to control the discharge of liquid from the drain pipe 17.
[0028] Please see Figure 1 , Figure 2 In this embodiment, a second mounting hole 22 is provided on the side of the pyrolysis reactor body 2 away from the first mounting hole 10. A first air inlet pipe 23 is fixedly connected inside the second mounting hole 22. A blower 24 is fixedly connected to one end of the first air inlet pipe 23. A second support base 25 is fixedly connected to the bottom of the blower 24. A second air inlet pipe 26 is fixedly connected to the side of the blower 24. A third solenoid valve 27 is installed inside the second air inlet pipe 26. The third solenoid valve 27 is electrically connected to the PLC controller 9. The second mounting hole 22 is used to fix the first air inlet pipe 23. The first air inlet pipe 23 delivers inert gas into the pyrolysis reactor body 2. The blower 24 draws the inert gas into the pyrolysis reactor body 2 through the second air inlet pipe 26, thereby achieving the effect of ventilation. This can quickly reduce the methanol gas concentration in the pyrolysis reactor body 2. The second support base 25 is used to fix the blower 24, and the third solenoid valve 27 is used to install the second air inlet pipe 26 for venting.
[0029] During operation, when the methanol storage tank 3 leaks, methanol gas diffuses into the cracking reactor body 2. At this time, the sensing head 7 of the electrochemical sensor 6 detects methanol. The electrochemical sensor 6 generates a current signal proportional to the concentration through the oxidation-reduction reaction between methanol and the catalyst on the electrode surface. This current signal is transmitted to the PLC controller 9. The PLC controller 9 compares and analyzes the signal with a preset threshold. When the detected methanol concentration exceeds the safety limit, the control unit inside the PLC controller 9 immediately triggers the alarm system, causing the audible and visual alarm 8 to sound and light up. At the same time, the PLC controller 9 controls the start of the exhaust fan 12 and closes the first solenoid valve 5, stopping the supply of methanol to the methanol storage tank 3. After the exhaust fan 12 extracts the leaked methanol gas from the cracking reactor body 2, the exhaust fan 24 is started, which draws inert gas into the cracking reactor body 2 for replacement, thereby achieving the effect of ventilation. This can prevent the methanol gas concentration in the cracking reactor body 2 from increasing.
[0030] By implementing the above steps and installing a ventilation device, the hazards caused by methanol gas leakage can be avoided. By installing a recovery device, the leaked methanol gas can be recovered and reused, thereby achieving the effect of saving resources and solving the existing problems of not being able to ventilate or recover leaked methanol gas.
Claims
1. Methanol leakage venting device for cleavage reactors comprising a base (1), characterized in that: A cracking reactor body (2) is installed on the top of the base (1). A methanol storage tank (3) is installed inside the cracking reactor body (2). An electrochemical sensor (6) is installed on the outside of the methanol storage tank (3). A sensing head (7) is installed on the side of the electrochemical sensor (6). The sensing head (7) extends into the chamber of the cracking reactor body (2). An audible and visual alarm (8) is installed below the electrochemical sensor (6). A PLC controller (9) is installed below the audible and visual alarm (8). (6) and the audible and visual alarm (8) are both electrically connected to the PLC controller (9). A first mounting hole (10) is opened on the outside of the pyrolysis reactor body (2). The first mounting hole (10) is fixedly connected to the exhaust pipe (11). One end of the exhaust pipe (11) is fixedly connected to the exhaust fan (12). The side of the exhaust fan (12) is fixedly connected to the output gas pipe (14). A second solenoid valve (15) is installed inside the output gas pipe (14). The second solenoid valve (15) is electrically connected to the PLC controller (9).
2. The methanol leak venting device for a cracking reactor according to claim 1, characterized by: A feed pipe (4) is fixedly connected to the top of the methanol storage tank (3). A first solenoid valve (5) is installed inside the feed pipe (4). The first solenoid valve (5) is electrically connected to the PLC controller (9).
3. The methanol leak venting device for a cracking reactor according to claim 1, characterized by: The bottom of the exhaust fan (12) is equipped with a first support base (13).
4. The methanol leak venting device for a cracking reactor of claim 1, wherein: A condenser (16) is fixedly connected to one end of the output gas pipe (14), and a drain pipe (17) is fixedly connected to the side of the condenser (16). A control valve (18) is installed inside the drain pipe (17).
5. The methanol leak venting device for a cracking reactor of claim 4, wherein: A connecting pipe (19) is welded to the side of the condenser (16) away from the outlet pipe (14). A filter box (20) is fixedly connected to one end of the connecting pipe (19), and an exhaust pipe (21) is fixedly connected to the side of the filter box (20).
6. The methanol leakage venting device for a cracking reactor according to claim 1, characterized by: A second mounting hole (22) is provided on the side of the pyrolysis reactor body (2) away from the first mounting hole (10), and a first air inlet pipe (23) is fixedly connected inside the second mounting hole (22).
7. The methanol leakage venting device for a cracking reactor according to claim 6, characterized by: A fan (24) is fixedly connected to one end of the first air inlet pipe (23). A second support base (25) is fixedly connected to the bottom of the fan (24). A second air inlet pipe (26) is fixedly connected to the side of the fan (24). A third solenoid valve (27) is installed inside the second air inlet pipe (26). The third solenoid valve (27) is electrically connected to the PLC controller (9).