Safety protection device and system for isooctyl nitrate production plant

Abstract

The utility model relates to the technical field of isooctyl nitrate production, in particular to a safety protection device and system for an isooctyl nitrate production plant, which comprises an air inlet fan and an air outlet fan arranged on two opposite walls of the plant, and a ventilation mechanism arranged on the walls of the plant, the ventilation mechanism comprises a replacement assembly arranged on the wall of the plant and located on one side of the air outlet fan and a ventilation assembly arranged on the wall of the plant and arranged on the air outlet fan in a covering mode. The replacement assembly is used in cooperation with the ventilation assembly. The movable plate driven by the electric push rod is matched with the double-replacement-opening design, mechanical pushing and replacement of the activated carbon module are conducted in a closed mode in the whole operation process, and personnel are prevented from making direct contact with toxic substances. A spline rod-slide rail mechanism ensures balanced stress when the box cover is opened and closed, and a push plate pressing system pre-tightened by a spring is combined, so that the module positioning reliability under the condition of high air tightness is ensured; the air inlet fan and the high-position air outlet fan form laminar ventilation, the adsorption box body covers the structural layout of the air outlet fan, and pollution gas directionally flows through the activated carbon adsorption layer.

Description

Technical Field

[0001] This utility model relates to the field of isooctyl nitrate production technology, specifically to a safety protection device and system for isooctyl nitrate production plants. Background Technology

[0002] During the production of isooctyl nitrate, the nitration reaction stage generates large amounts of toxic and harmful gases such as nitrogen oxides (NOx) and nitric acid vapor (HNO), and organic solvents such as isooctyl alcohol easily form volatile organic compounds (VOCs). Existing plants generally use fixed ventilation systems combined with activated carbon adsorption devices to treat these harmful gases, but this approach has significant drawbacks in practical applications:

[0003] 1) Replacing the activated carbon adsorption module requires shutdown and disassembly, which is complex and poses a risk of secondary pollution;

[0004] 2) Traditional ventilation systems cannot achieve real-time response to the concentration of harmful gases, often resulting in insufficient air exchange or energy waste;

[0005] 3) The lack of a multi-parameter interlocking control system makes it difficult to provide timely warnings and handle sudden gas leak accidents.

[0006] These problems severely restrict production safety and environmental compliance. Utility Model Content

[0007] The purpose of this invention is to provide a safety protection device and system for isooctyl nitrate production plants, which is mainly used to solve the problems mentioned in the background art, such as the need to shut down the machine for disassembly and reassembly when replacing activated carbon adsorption modules, which are complicated to operate and pose a risk of secondary pollution.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a safety protection device and system for an isooctyl nitrate production plant, comprising an intake fan and an exhaust fan installed on two opposite walls of the plant, and a ventilation mechanism installed on the plant wall. The ventilation mechanism includes a replacement component installed on the plant wall and located on one side of the exhaust fan, and a ventilation component installed on the plant wall and covering the exhaust fan. The replacement component is used in conjunction with the ventilation component.

[0009] Furthermore, the replacement assembly includes a placement box detachably connected to the factory wall, a box cover hinged to the placement box, and an electric push rod located on the factory wall and at the bottom of the placement box; the placement box has a first replacement port through it, the box cover has a push plate slidably connected to it via a slide rod, the slide rod is fitted with a spring, the two ends of the spring are respectively connected to the box cover and the push plate, the output shaft of the electric push rod is connected to a moving rod, the moving rod is connected to a moving plate, and the moving plate is adapted to the replacement port.

[0010] Furthermore, the ventilation assembly includes an adsorption box detachably connected to the factory wall and covered by an exhaust fan, and a ventilation hood disposed on the adsorption box; the adsorption box has a second replacement port adapted to the first replacement port, and the ventilation hood is connected to a ventilation pipe.

[0011] Furthermore, a spline rod is rotatably connected to the push plate, and a keyway adapted to the box cover is opened on the box cover, and the spline rod can slide in the keyway.

[0012] Furthermore, the factory building wall is provided with a chute located on the other side of the exhaust fan.

[0013] Furthermore, the safety protection system includes multiple sensors and alarms installed in the factory building; the sensors, alarms, air intake fans, air exhaust fans, and electric actuators are all interlocked with the PLC controller.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0015] 1. Modular Replacement and Safety Isolation: A movable plate driven by an electric actuator, combined with a dual replacement port design, enables the mechanical pushing and replacement of activated carbon modules. The entire operation is conducted in a sealed environment, preventing direct contact with toxic substances. A splined rod-slide rail mechanism ensures balanced force during lid opening and closing, while a spring-preloaded push-plate clamping system ensures reliable module positioning under high airtightness conditions.

[0016] 2. Intelligent airflow organization optimization: The intake fan and the high-level exhaust fan form a laminar flow ventilation, which, together with the structure of the exhaust fan covered by the adsorption box, allows the polluted gas to flow directionally through the activated carbon adsorption layer.

[0017] 3. Multimodal emergency response: Through the fusion detection of multiple parameters such as NOx, O2, and LEL, the PLC controller calculates the gas diffusion model in real time. When the NOx concentration in the nitration reaction zone exceeds the preset value, the intake fan is activated and the exhaust fan is activated in reverse for forced exhaust.

[0018] 4. Online maintenance and waste recycling: The chute structure and the moving plate work together to achieve directional sliding collection of saturated activated carbon. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the present utility model;

[0020] Figure 2 This is a rear view of the present invention;

[0021] Figure 3 This is a side view of the present invention;

[0022] Figure 4 This is a structural diagram of the ventilation mechanism of this utility model;

[0023] Figure 5 This is a partial structural diagram of the present utility model;

[0024] Figure 6 This is a system block diagram of the present invention.

[0025] In the picture:

[0026] 1. Intake fan; 2. Exhaust fan; 3. Placement box; 4. Box cover; 5. Electric push rod; 6. Slide rod; 7. Push plate; 8. Spring; 9. Moving rod; 10. Moving plate; 11. Adsorption box; 12. Ventilation hood; 13. Ventilation pipe; 14. Spline rod; 15. Chute. Detailed Implementation

[0027] Please see Figures 1 to 5 A safety protection device for an isooctyl nitrate production plant mainly consists of an intake fan 1 and an exhaust fan 2 installed on two opposite walls of the plant, and a ventilation mechanism mounted on the plant walls. The intake fan 1 is located in the clean area (non-production side), while the exhaust fan 2 is designed at a high position with short, straight ducts. Both the intake fan 1 and exhaust fan 2 contain 4-20mA analog feedback or passive contact signals for interlocking control by a PLC controller. This ventilation mechanism primarily adsorbs harmful gases using adsorption carbon blocks, and then further treats the adsorbed gases (e.g., catalytic combustion, alkaline washing, etc.) before releasing them into the air, reducing the environmental impact of harmful gases.

[0028] The ventilation system consists of replacement components and ventilation components.

[0029] Specifically, the replacement assembly includes a placement box 3, a box cover 4, and an electric push rod 5. The placement box 3 is detachably connected to the factory wall by bolts and screws, and is used to place activated carbon blocks. A first replacement port (e.g., through-hole) is provided on the placement box 3. Figure 1 (As shown); the lid 4 is hinged to one side of the placement box 3, and the other side is fixed to the placement box 3 by a snap-fit. Multiple sliding holes are provided on the lid 4, and sliding rods 6 are installed in the sliding holes. Springs 8 are fitted onto the sliding rods 6. One end of the sliding rod 6 is connected to a push plate 7 located inside the placement box 3. The push plate 7 is adapted to the inner wall of the placement box 3, and a sealing strip is installed on the outer wall of the push plate 7. Both ends of the spring 8 are fixed to the lid 4 and the push plate 7 respectively. A splined rod 14 is rotatably connected to the push plate 7 via a bearing. A keyway adapted to the lid 4 is provided on the lid 4, and the splined rod 14 can slide within the keyway (e.g., ...). Figure 5As shown, when the box cover 4 needs to be rotated, first pull the spline rod 14 so that the push plate 7 is close to the box cover 4. When the push plate 7 no longer affects the opening and closing of the box cover 4, rotate the spline rod 14 so that its protrusion is locked on the box cover 4. The electric push rod 5 is installed on the factory wall and located below the ventilation mechanism. The electric push rod 5 has a self-locking function. A moving rod 9 is connected to the output shaft of the electric push rod 5. A moving plate 10 is connected to the moving rod 9. The moving plate 10 is adapted to the first replacement port. The moving rod 9 can be moved by the electric push rod 5, which in turn moves the first replacement port inside the moving plate 10.

[0030] Specifically, the ventilation assembly includes an adsorption box 11 and a ventilation hood 12. The adsorption box 11 is detachably connected to the factory wall by bolts and screws and covers the exhaust fan 2. A second replacement port is opened through the adsorption box 11, and the size of the second replacement port is the same as that of the first replacement port. The ventilation hood 12 is provided on the adsorption box 11 (e.g., Figure 3 As shown in the figure, a ventilation pipe 13 is connected to the ventilation hood 12 to transport the adsorbed harmful gases to other treatment equipment. A chute 15 is also provided on the wall of the plant, located on the other side of the exhaust fan 2, for collecting the used activated carbon blocks.

[0031] like Figure 6 As shown, the safety protection system consists of multiple sensors and alarms installed within the plant. Specifically, the sensors include: nitrogen oxide (NOx) sensors installed in the nitrate ester reactor and nitration reaction zone; nitric acid vapor (HNO3) sensors installed near the breather valve of the storage tank; isooctyl alcohol (VOCs) and flammable gas (LEL) sensors installed on the top of the storage tank; oxygen (O2) sensors installed in the nitrogen purging area; temperature and humidity sensors installed around the reactor; and pressure sensors installed in the compressed air pipeline and reactor pressure relief port. All the aforementioned sensors, alarms, intake fan 1, exhaust fan 2, and electric actuator 5 are interlocked with a PLC controller. A threshold is set on the PLC controller. When the value detected by the sensor differs from the set threshold, a signal is transmitted to the PLC controller, which then activates the alarm to alert personnel; and controls the opening and closing of intake fan 1 and exhaust fan 2, as well as their rotation speed. The PLC controller can also control the extension and retraction of the output shaft of electric actuator 5.

[0032] Working process and principle of this utility model:

[0033] When using the ventilation mechanism of this device, first pull the spline rod 14 to move the push plate 7, compressing the spring 8 until the push plate 7 no longer obstructs the rotation of the cover 4. Then rotate the spline rod 14 so that the protrusion on the spline rod 14 locks onto the cover 4. Then open the cover 4 and place multiple activated carbon blocks that are compatible with the first replacement port into the placement box 3. Then rotate the cover 4 in the opposite direction so that the cover 4 covers the opening of the placement box 3 again and fixes the positions of the placement box 3 and the cover 4 at this time by the buckle (not shown in the figure). Then rotate the spline rod 14 so that the spring 8 restricts it, moving the spline rod 14 and thus moving the push plate 7 to press the activated carbon blocks. Then activate the electric push rod 5, which moves the moving rod 9 and thus the moving plate 10, thereby pushing the activated carbon blocks into the second replacement port. Finally, fresh air is introduced into the factory through intake fan 1, and toxic gases are drawn out of the factory through exhaust fan 2. The gases are adsorbed by activated carbon blocks, and the adsorbed air is transported through ventilation pipe 13 to other purification equipment for further purification before being discharged into the air.

[0034] When the safety protection system of this device is in use, sensors installed in the factory building detect the gas generated during the production of isooctyl nitrate. When the measured value is different from the threshold set in advance on the PLC controller, the PLC controller controls the alarm to be activated, alerting the staff inside the factory building. Then, it controls the opening of intake fan 1 and exhaust fan 2 or controls the speed of intake fan 1 and exhaust fan 2. Fresh air is introduced through intake fan 1 and harmful gas is discharged through exhaust fan 2. The harmful gas is adsorbed by the ventilation mechanism located outside the factory building and transported to other toxic gas treatment equipment for purification.

Claims

1. A safety protection device and system for an isooctyl nitrate production plant, comprising an intake fan (1) and an exhaust fan (2) installed on opposite walls of the plant, and a ventilation mechanism installed on the plant walls, characterized in that, The ventilation mechanism includes a replacement component installed on the wall of the factory building and located on one side of the exhaust fan (2), and a ventilation component installed on the wall of the factory building and covering the exhaust fan (2); the replacement component is used in conjunction with the ventilation component.

2. The safety protection device and system as described in claim 1, characterized in that, The replacement assembly includes a placement box (3) detachably connected to the wall of the factory building, a box cover (4) hinged to the placement box (3), and an electric push rod (5) located on the wall of the factory building and at the bottom of the placement box (3). The placement box (3) has a first replacement port through it. The box cover (4) is slidably connected to a push plate (7) via a slide rod (6). A spring (8) is sleeved on the slide rod (6). The two ends of the spring (8) are connected to the box cover (4) and the push plate (7) respectively. A moving rod (9) is connected to the output shaft of the electric push rod (5). A moving plate (10) is connected to the moving rod (9). The moving plate (10) is adapted to the replacement port.

3. The safety protection device and system as described in claim 2, characterized in that, The ventilation assembly includes an adsorption box (11) detachably connected to the wall of the factory and covered by the exhaust fan (2), and a ventilation hood (12) provided on the adsorption box (11); a second replacement port adapted to the first replacement port is provided through the adsorption box (11), and a ventilation pipe (13) is connected to the ventilation hood (12).

4. The safety protection device and system as described in claim 2, characterized in that, A spline rod (14) is rotatably connected to the push plate (7), and a keyway adapted to the box cover (4) is opened on the box cover (4), and the spline rod (14) can slide in the keyway.

5. The safety protection device and system as described in claim 1, characterized in that, The wall of the factory building is provided with a chute (15) located on the other side of the exhaust fan (2).

6. The safety protection device and system as described in claim 1, characterized in that, It includes multiple sensors and alarms installed in the factory building; the sensors, alarms, intake fan (1), exhaust fan (2) and electric actuator (5) are all interlocked with the PLC controller.

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