A fan unit control system based on multiple degassing bins

Abstract

The present invention discloses a fan group control system based on multiple degassing bins, comprising a degassing fan group, a heat exchange and filtering device, a plurality of degassing units, a gas distribution valve group and a dust removal device; the degassing unit comprises a degassing bin body, an air intake control valve group and a hydrocarbon detector; degassing gas is provided by the degassing fan group, and the degassing gas is distributed to each degassing bin body for gas supply through the gas distribution valve group, thereby saving investment in degassing fans and reducing energy consumption; and by arranging hydrocarbon detectors in the degassing bin body to monitor the monomer concentration in each degassing bin body in real time, the total degassing gas volume generated by the degassing fan group and the degassing gas volume distributed to each degassing bin body by the gas distribution valve group can be adjusted in real time according to the detection value of the hydrocarbon detector in each degassing bin body, thereby further reducing the energy consumption of system operation.

Description

Technical Field

[0001] The present invention relates to the field of energy-saving fan technology, and in particular to a fan unit control and system based on multiple degassing bins. Background Art

[0002] After polymerization of polyolefin products is complete, residual monomers remain in the polymer. These monomers are slowly released after leaving the reactor, with the release rate decreasing over time. Consequently, the residual monomer content in the polymer decreases over time. Polyolefin monomers are often flammable and explosive gases. For example, the monomer of polyethylene is ethylene. To ensure the safety of explosive polyolefin production and storage, the produced polyolefin products must be degassed using a degassing chamber. The polymer product within the degassing chamber releases residual monomers, and if the monomer concentration reaches explosive levels, it can cause an accident. Therefore, a certain amount of gas must be introduced into the degassing chamber to maintain a safe monomer concentration at all locations within the chamber.

[0003] Experiments show that the release rate of polymer monomers is closely related to the ambient temperature and the time of production, but has nothing to do with the monomer concentration around the polymer. Therefore, the amount of gas introduced into the degassing chamber has nothing to do with the degassing rate, but is related to the temperature of the introduced gas.

[0004] Polymer production is prone to power outages, machine failures, and other accidents. Due to the unique nature of the degassing chamber, a malfunction of the front-end fan or power supply failure can easily lead to a production safety accident, presenting a significant production risk. Summary of the Invention

[0005] The purpose of the present invention is to propose a fan unit control system based on multiple degassing bins to solve one or more technical problems existing in the above-mentioned background technology.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A fan unit control system based on multiple degassing bins, comprising a degassing fan unit, a heat exchange and filtering device, multiple degassing units, a gas distribution valve group, and a dust removal device; the degassing unit comprises a degassing bin body, an air intake control valve group, and a hydrocarbon detector;

[0008] The input end of the heat exchange and filtering device is connected to the output end of the degassing air unit, and the output ends of the heat exchange and filtering device are respectively connected to the input ends of the gas distribution valve group, and the gas distribution valve group is respectively connected to the input ends of the air inlet control valve groups of the multiple degassing units; the heat exchange and filtering device is used to adjust the temperature of the degassed gas so that the temperature of the gas input to the degassing bin body is at the optimal degassing temperature, and the gas distribution valve group is used to distribute the gas generated by the degassing air unit to each of the degassing bin bodies;

[0009] The degassing bin body is provided with a plurality of gas input ends, and the output ends of the air intake control valve group are respectively connected to the plurality of gas input ends of the degassing bin body, and the air intake control valve group is used to evenly distribute the degassed gas provided by the degassing blower group to each gas input end of the degassing bin body;

[0010] The hydrocarbon detector is installed in the degassing chamber, and is used to detect the monomer gas concentration in the degassing chamber in real time. The degassing air unit and the gas distribution valve group respectively adjust the total gas supply and the gas volume entering the degassing chamber in real time according to the detection value of the hydrocarbon detector;

[0011] The tail gas discharge ends of the degassing bin bodies are all connected to the dust removal device.

[0012] Preferably, an emergency protective gas tank is also included, and the output end of the emergency protective gas tank is connected to the input end of the air intake control valve group; when the degassing air unit fails or the power is cut off, the emergency protective gas tank is used to pass the stored protective gas into the degassing bin body through the air intake control valve group.

[0013] Preferably, the degassing unit also includes a smoke detector, which is arranged in the degassing chamber body and is used to monitor the smoke concentration in the degassing chamber body; when the smoke detector detects that the smoke concentration in the degassing chamber body exceeds a set value, the emergency protective gas tank will pass the stored protective gas into the degassing chamber body through the air intake control valve group.

[0014] Preferably, it further comprises a static eliminator, which is connected to the material input end of the degassing bin body and is used to eliminate static electricity on the material entering the degassing bin body.

[0015] Preferably, the degassing unit further includes a material self-circulation channel, and the material self-circulation channel is respectively connected to the material discharge end and the second material input end of the degassing bin body.

[0016] Preferably, it also includes an inter-tank scheduling channel, and the degassing unit also includes an air locking and reversing device, the input end of the air locking and reversing device is connected to the material discharge end of the degassing bin body, the first output end of the air locking and reversing device is connected to the material self-circulation channel, the starting end of the inter-tank scheduling channel is connected to the second output end of the air locking and reversing device, and the end of the inter-tank scheduling channel is connected to the third material input end of the degassing bin body.

[0017] Preferably, it also includes a discharge conveying channel, the starting end of the discharge conveying channel is connected to the discharge conveying gas supply end, the end of the discharge conveying channel is connected to the material degassing output end, and the discharge conveying channel is connected to the second output end of the air locking and reversing device, which is used to provide conveying air pressure to discharge the degassed material to the material degassing output end.

[0018] Preferably, it also includes a self-circulating conveying air pipe, the starting end of which is connected to the self-circulating conveying gas supply end, and the self-circulating conveying air pipe is connected to the material self-circulating channel, for providing conveying air pressure so that the material enters the degassing bin body again through the material self-circulating channel.

[0019] Preferably, a plurality of cones are provided at the bottom of the degassing bin body, and the cones are cones of equal taper or cones of unequal taper.

[0020] Preferably, the cone is connected to a gas input interface, and the gas input interface is communicated with the output end of the intake control valve group.

[0021] The beneficial effects of the present invention are as follows: degassing gas is provided by a degassing air unit, and the degassing gas is distributed to each degassing bin through a gas distribution valve assembly, thereby saving investment in degassing air units and reducing energy consumption. Furthermore, by installing hydrocarbon detectors within the degassing bins to monitor the monomer concentration within each degassing bin in real time, the total degassing gas volume generated by the degassing air unit and the degassing gas volume distributed to each degassing bin by the gas distribution valve assembly can be adjusted in real time based on the detection values ​​of the hydrocarbon detectors within each degassing bin, further reducing the energy consumption of system operation. Furthermore, the present invention utilizes heat exchange and filtration devices to regulate the temperature of the degassing gas, ensuring that the degassing gas is within the optimal degassing temperature range and ensuring degassing efficiency and effectiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings further illustrate the present invention, but the contents in the accompanying drawings do not constitute any limitation to the present invention.

[0023] Figure 1 It is a schematic diagram of the system structure of one embodiment of the present invention.

[0024] Among them: degassing fan unit 1, heat exchange and filtering device 2, gas distribution valve group 3, dust removal device 4,

[0025] Degassing bin body 5, air intake control valve group 6, hydrocarbon detector 7, emergency protective gas tank 8, smoke detector 9, static elimination device 10, material self-circulation channel 11, inter-tank scheduling channel 12, air locking and reversing device 13, discharge conveying channel 14, self-circulation conveying air pipe 15. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0027] A fan unit control system based on multiple degassing bins in this embodiment is described in the attached Figure 1 , including a degassing fan unit 1, a heat exchange and filtering device 2, multiple degassing units, a gas distribution valve group 3 and a dust removal device 4; the degassing unit includes a degassing bin body 5, an air intake control valve group 6 and a hydrocarbon detector 7;

[0028] The input end of the heat exchange and filtration device 2 is connected to the output end of the degassing air unit 1, and the output ends of the heat exchange and filtration device are respectively connected to the input ends of the gas distribution valve group 3, and the gas distribution valve group 3 is respectively connected to the input ends of the air inlet control valve groups 6 of multiple degassing units; the heat exchange and filtration device 2 is used to adjust the temperature of the degassed gas so that the temperature of the gas input to the degassing bin body 5 is at the optimal degassing temperature, and the gas distribution valve group 3 is used to distribute the gas generated by the degassing air unit 1 to each degassing bin body 5;

[0029] The degassing bin body 5 is provided with multiple gas input ends, and the output ends of the air intake control valve group 6 are respectively connected to the multiple gas input ends of the degassing bin body 5. The air intake control valve group 6 is used to evenly distribute the degassed gas provided by the degassing blower unit 1 to each gas input end of the degassing bin body 5;

[0030] The hydrocarbon detector 7 is installed in the degassing chamber body 5 and is used to detect the monomer gas concentration in the degassing chamber body 5 in real time. The degassing fan unit 1 and the gas distribution valve unit 3 adjust the total gas supply volume and the gas volume entering the degassing chamber body 5 in real time according to the detection value of the hydrocarbon detector 7;

[0031] The tail gas discharge ends of the degassing bin body 5 are connected to the dust removal device 4. The dust removal device 4 is used to remove the dust from the tail gas discharged from the degassing bin body 5 and then send it to the tail gas treatment system for tail gas treatment.

[0032] This embodiment uses a degassing air unit 1 to provide degassing gas to the degassing unit, and distributes the degassing gas to each degassing bin 5 through a gas distribution valve group 3, saving investment in the degassing air unit and reducing energy consumption. Furthermore, by installing a hydrocarbon detector 7 in the degassing bin 5 to monitor the monomer concentration in each degassing bin 5 in real time, the total degassing gas volume generated by the degassing air unit 1 and the degassing gas volume distributed by the gas distribution valve group 3 to each degassing bin 5 can be adjusted in real time based on the detection values ​​of the hydrocarbon detector 7 in each degassing bin 5, further reducing the energy consumption of the system operation. In addition, this embodiment also uses a heat exchanger and a filter device to adjust the temperature of the degassing gas, so that the degassing gas is within the optimal degassing temperature range, ensuring degassing efficiency and effectiveness. The degassing gas is then removed from the dust by the dust removal device 4 and sent to the exhaust gas treatment system for exhaust gas treatment.

[0033] Since the production time of the polymers stored in each degassing bin body 5 is different, the monomer release rate of each degassing bin body 5 is different at the same time. Therefore, in this embodiment, multiple fans are combined into a degassing fan unit 1. When selecting the fan, it is only necessary to meet the total air volume of all degassing bin bodies 5 at the same time. Compared with each degassing bin body 5 being equipped with a separate fan, the total air volume of the fan can be reduced by nearly half, which can effectively save investment.

[0034] Preferably, an emergency shielding gas tank 8 is further included, the output end of which is connected to the input end of the air inlet control valve group 6. When the degassing blower unit 1 fails or experiences a power outage, the emergency shielding gas tank 8 is used to pass the stored shielding gas (such as nitrogen, argon, or carbon dioxide) into the degassing bin body 5 through the air inlet control valve group 6. Thus, in this embodiment, by connecting the emergency shielding gas tank 8 to the system and connecting it to the air inlet control valve to achieve gas supply to each degassing bin body 5 in an emergency, the system can respond to safety conditions such as blower failure and power outage through the compressed gas stored in the emergency shielding gas tank 8, thereby ensuring production safety.

[0035] Preferably, the degassing unit further includes a smoke detector 9, which is installed in the degassing chamber body 5 and is used to monitor the smoke concentration in the degassing chamber body 5. When the smoke detector 9 detects that the smoke concentration in the degassing chamber body 5 exceeds a set value, the emergency protective gas tank 8 introduces the stored protective gas into the degassing chamber body 5 through the air inlet control valve group 6. Thus, the smoke detector 9 monitors the smoke in the degassing chamber body 5, and when the smoke exceeds the preset value, an alarm is triggered, and protective gas is introduced into the corresponding degassing chamber body 5 through the emergency protective gas tank 8 to promptly address the safety hazard.

[0036] Preferably, the device further includes a static eliminator 10, which is connected to each material input port of the degassing bin body 5. The static eliminator 10 is used to eliminate static electricity in the materials entering the degassing bin body 5. This prevents static electricity generated during material transportation from being carried into the degassing bin body 5 and causing static electricity accumulation, which could be dangerous.

[0037] Preferably, the degassing unit further includes a material self-circulation channel 11, which is connected to the material discharge end and the second material input end of the degassing bin body 5. By providing the material self-circulation channel 11, the material can be self-circulated during the degassing process, thereby improving the uniformity of the material in the degassing bin body 5 and preventing excessively high local monomer concentrations.

[0038] Preferably, the degassing unit further includes an inter-tank scheduling channel 12, and an air lock and reversing device 13. The input end of the air lock and reversing device 13 is connected to the material discharge end of the degassing bin body 5, the first output end of the air lock and reversing device 13 is connected to the material self-circulation channel 11, the starting end of the inter-tank scheduling channel 12 is connected to the second output end of the air lock and reversing device 13, and the end of the inter-tank scheduling channel 12 is connected to the third material input end of the degassing bin body. The inter-tank adjustment channel allows the material to flow in each degassing bin body 5. At the same time, under the action of the air lock and reversing device 13, the material in each degassing bin body 5 can be controlled and scheduled, facilitating maintenance and emergency response.

[0039] Preferably, it also includes a discharge conveying channel 14, the starting end of the discharge conveying channel 14 is connected to the discharge conveying gas supply end, the end of the discharge conveying channel 14 is connected to the material degassing output end, and the discharge conveying channel 14 is connected to the second output end of the air locking and reversing device 13, which is used to provide conveying air pressure to discharge the degassed material to the material degassing output end.

[0040] Preferably, it also includes a self-circulating conveying air pipe 15, the starting end of the self-circulating conveying air pipe 15 is connected to the self-circulating conveying gas supply end, and the self-circulating conveying air pipe 15 is connected to the material self-circulating channel 11, which is used to provide conveying air pressure so that the material can enter the degassing bin body 5 again through the material self-circulating channel 11.

[0041] Preferably, the bottom of the degassing bin body 5 is provided with multiple cones, each of equal or unequal tapers. The taper of the cones at the bottom of the degassing bin body 5, the distribution of air inlet points, and the air volume at the air inlet points can be determined based on actual testing to adapt to different types of polymers and ensure uniform air volume within the degassing bin.

[0042] Preferably, the cone is connected to a gas input interface, which is connected to the output end of the air intake control valve group 6. Each cone is provided with a gas input interface, so that the air intake control valve group 6 can evenly distribute the degassed gas provided by the degassing blower group 1 to the gas input interfaces of each cone of the degassing bin body 5, ensuring uniform gas volume at each position in the degassing bin body 5.

[0043] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and are not to be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will readily conceive of other specific embodiments of the present invention without inventive effort, and such embodiments will fall within the scope of protection of the present invention.

Claims

1. A fan unit control system based on multiple degassing bins, characterized in that: It includes a degassing fan unit, a heat exchange and filtering device, multiple degassing units, a gas distribution valve group and a dust removal device; the degassing unit includes a degassing bin body, an air intake control valve group and a hydrocarbon detector; The input end of the heat exchange and filtering device is connected to the output end of the degassing air unit, and the output ends of the heat exchange and filtering device are respectively connected to the input ends of the gas distribution valve group, and the gas distribution valve group is respectively connected to the input ends of the air inlet control valve groups of the multiple degassing units; the heat exchange and filtering device is used to adjust the temperature of the degassed gas so that the temperature of the gas input to the degassing bin body is at the optimal degassing temperature, and the gas distribution valve group is used to distribute the gas generated by the degassing air unit to each of the degassing bin bodies; The degassing bin body is provided with a plurality of gas input ends, and the output ends of the air intake control valve group are respectively connected to the plurality of gas input ends of the degassing bin body, and the air intake control valve group is used to evenly distribute the degassed gas provided by the degassing blower group to each gas input end of the degassing bin body; The hydrocarbon detector is installed in the degassing chamber, and is used to detect the monomer gas concentration in the degassing chamber in real time. The degassing air unit and the gas distribution valve group respectively adjust the total gas supply and the gas volume entering the degassing chamber in real time according to the detection value of the hydrocarbon detector; The tail gas discharge ends of the degassing bin body are connected to the dust removal device; The degassing unit further includes a material self-circulation channel, which is respectively connected to the material discharge end and the second material input end of the degassing bin body; It also includes an inter-tank scheduling channel, and the degassing unit also includes an air locking and reversing device. The input end of the air locking and reversing device is connected to the material discharge end of the degassing bin body, the first output end of the air locking and reversing device is connected to the material self-circulation channel, the starting end of the inter-tank scheduling channel is connected to the second output end of the air locking and reversing device, and the end of the inter-tank scheduling channel is connected to the third material input end of the degassing bin body.

2. A fan unit control system based on multiple degassing bins according to claim 1, characterized in that: It also includes an emergency protective gas tank, the output end of which is connected to the input end of the air intake control valve group; when the degassing air unit fails or the power is cut off, the emergency protective gas tank is used to pass the stored protective gas into the degassing bin through the air intake control valve group.

3. A fan unit control system based on multiple degassing bins according to claim 2, characterized in that: The degassing unit also includes a smoke detector, which is arranged in the degassing chamber body and is used to monitor the smoke concentration in the degassing chamber body; when the smoke detector detects that the smoke concentration in the degassing chamber body exceeds a set value, the emergency protective gas tank will pass the stored protective gas into the degassing chamber body through the air intake control valve group.

4. A fan unit control system based on multiple degassing bins according to claim 1, characterized in that: It also includes a static eliminator, which is connected to the material input end of the degassing bin body and is used to eliminate static electricity on the material entering the degassing bin body.

5. The fan unit control system based on multiple degassing bins according to claim 1, characterized in that: It also includes a discharge conveying channel, the starting end of the discharge conveying channel is connected to the discharge conveying gas supply end, the end of the discharge conveying channel is connected to the material degassing output end, and the discharge conveying channel is connected to the second output end of the air locking and reversing device, which is used to provide conveying air pressure to discharge the degassed material to the material degassing output end.

6. A fan unit control system based on multiple degassing bins according to claim 5, characterized in that: It also includes a self-circulating conveying air pipe, the starting end of which is connected to the self-circulating conveying gas supply end, and the self-circulating conveying air pipe is connected to the material self-circulating channel, which is used to provide conveying air pressure so that the material can re-enter the degassing bin body through the material self-circulating channel.

7. A fan unit control system based on multiple degassing bins according to claim 1, characterized in that: The bottom of the degassing bin body is provided with a plurality of cones, and the cones are cones of equal taper or cones of unequal taper.

8. A fan unit control system based on multiple degassing bins according to claim 7, characterized in that: The cone is connected to a gas input interface, and the gas input interface is communicated with the output end of the intake control valve group.

Images