Dust removal and explosion prevention system for bisphenol A feeding station

Abstract

The utility model relates to a dust removal device, and particularly discloses a dust removal explosion-proof system for a bisphenol A feeding station, which comprises a feeding bin, a feeding pipe arranged on the feeding bin, a first filter communicated with the feeding bin, a nitrogen pipeline arranged in a circulating manner, an air supply pipe connected with the nitrogen pipeline, and an exhaust pipe connected with the nitrogen pipeline, the compressor is arranged on the nitrogen pipeline, the filtering device is arranged on the nitrogen pipeline, and the buffer tank is arranged on the nitrogen pipeline; the first filter is connected with the nitrogen pipeline and arranged on the upstream of the filter device, the filter device is arranged on the upstream of the compressor, and the buffer tank is arranged on the downstream of the compressor. The dust removal and explosion prevention system for the bisphenol A feeding station can effectively absorb dust generated in the feeding process, reduce the oxygen concentration in the pipeline and prevent explosion.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of dust removal device, specifically, relate to a dust removal explosion -proof system for bisphenol A feeding station. BACKGROUND

[0002] Bisphenol A, also known as BPA, is an organic compound, mainly used for producing polycarbonate, epoxy resin, polysulfone resin, polyphenyl ether resin, unsaturated polyester resin and various high molecular materials.

[0003] When the dose of bisphenol A is much higher than the content in the current human body, it may cause organ failure, leukemia and rapid weight loss. The minimum explosion concentration of bisphenol A dust is 20g / m3. When the concentration of bisphenol A dust in the air reaches or exceeds this value, it may cause explosion when encountering fire or other ignition source.

[0004] The bisphenol A conveying system manually unpacks and feeds. The ton bag is lifted to the upper side of the receiving hopper by the hoist mechanism such as a gourd. The worker puts the discharge port into the feeding port of the receiving hopper below, then unties the bottom rope of the ton bag, and falls naturally to the receiving hopper below by gravity. A switch valve is arranged below the receiving hopper to separate the rear system. The rear system is provided with a basket and a warehouse pump for conveying to the designated warehouse. Bisphenol A dust is generated during the feeding process, which affects the health of workers, and dust explosion accidents may occur when the air concentration reaches a certain concentration. UTILITY MODEL CONTENT

[0005] The utility model aims at providing a dust removal explosion -proof system for bisphenol A feeding station, which can effectively absorb the dust generated during the feeding process, reduce the oxygen concentration in the pipeline, and prevent explosion.

[0006] The utility model realizes the following technical scheme: the dust removal explosion -proof system for bisphenol A feeding station of the utility model, including feeding bin, feeding pipe being arranged on the feeding bin, first filter being communicated with the feeding bin, nitrogen pipeline being arranged circularly, air supplement pipe being connected with the nitrogen pipeline, exhaust pipe being connected with the nitrogen pipeline, compressor being arranged on the nitrogen pipeline, filter device being arranged on the nitrogen pipeline, and buffer tank being arranged on the nitrogen pipeline;The first filter is connected with the nitrogen pipeline and arranged on the upstream of the filter device, the filter device is arranged on the upstream of the compressor, and the buffer tank is arranged on the downstream of the compressor.

[0007] Further, the filter device comprises a pair of second filters arranged in parallel.

[0008] Further, the inlet and outlet of the pair of second filters are each provided with a first valve.

[0009] Further, the nitrogen pipeline is provided with a second valve, which is arranged between the filtering device and the buffer tank.

[0010] Further, the exhaust pipe is provided with a third valve and a dust removal tank.

[0011] Further, the air supplement pipeline is connected with the outlet end of the first filter.

[0012] Further, the air supplement pipeline is provided with a fourth valve at the connection with the nitrogen pipeline, and a fifth valve at the connection with the first filter.

[0013] Further, the nitrogen pipeline is provided with an oxygen concentration meter and a differential pressure meter, which are arranged upstream of the filtering device.

[0014] The dust explosion prevention system for the bisphenol A feeding station has the following advantages and beneficial effects: when in use, the material is fed into the feeding bin through the feeding pipe, in the process, the dust and air in the feeding bin are extracted through the first filter by the compressor, since there is high-concentration nitrogen in the nitrogen pipeline, the air and dust (part of the dust that is not filtered by the first filter) enter the pipeline, since the oxygen concentration in the nitrogen pipeline is very low, the probability of dust explosion is significantly reduced, and the nitrogen in the nitrogen pipeline is circulated, and does not need to be updated in real time, only needs to be supplemented according to the high and low oxygen concentration in the nitrogen pipeline. The unfiltered dust is prevented from entering the compressor by the filtering device, part of the air sucked from the feeding bin is accommodated by the buffer tank, and the accumulated high-pressure gas in the nitrogen pipeline is discharged through the exhaust pipe. The device can not only directly absorb the dust generated in the feeding process, avoid the dust from escaping into the air, protect the health of workers and avoid environmental dust explosion, but also intermittently inject nitrogen into the circulating pipeline, which can not only reduce the amount of nitrogen, but also reduce the oxygen concentration in the nitrogen pipeline and the risk of dust explosion in the pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The dust explosion prevention system for the bisphenol A feeding station has the following advantages and beneficial effects: when in use, the material is fed into the feeding bin through the feeding pipe, in the process, the dust and air in the feeding bin are extracted through the first filter by the compressor, since there is high-concentration nitrogen in the nitrogen pipeline, the air and dust (part of the dust that is not filtered by the first filter) enter the pipeline, since the oxygen concentration in the nitrogen pipeline is very low, the probability of dust explosion is significantly reduced, and the nitrogen in the nitrogen pipeline is circulated, and does not need to be updated in real time, only needs to be supplemented according to the high and low oxygen concentration in the nitrogen pipeline. The unfiltered dust is prevented from entering the compressor by the filtering device, part of the air sucked from the feeding bin is accommodated by the buffer tank, and the accumulated high-pressure gas in the nitrogen pipeline is discharged through the exhaust pipe. The device can not only directly absorb the dust generated in the feeding process, avoid the dust from escaping into the air, protect the health of workers and avoid environmental dust explosion, but also intermittently inject nitrogen into the circulating pipeline, which can not only reduce the amount of nitrogen, but also reduce the oxygen concentration in the nitrogen pipeline and the risk of dust explosion in the pipeline.

[0016] Icons: 11-Feeding bin, 12-Feeding pipe, 13-First filter, 14-Fifth valve, 21-Nitrogen pipeline, 22-Maintenance gas pipe, 23-Exhaust pipe, 24-Compressor, 25-Filter device, 251-Second filter, 252-First valve, 26-Buffer tank, 27-Second valve, 28-Third valve, 29-Dust collector, 210-Fourth valve, 211-Oxygen concentration meter, 212-Differential pressure meter. Detailed Implementation

[0017] Example

[0018] The following description, in conjunction with specific embodiments, further illustrates the point, as shown in the appendix. Figure 1 As shown, the dust removal and explosion-proof system for a bisphenol A feeding station in this embodiment includes a feeding hopper 11, a feeding pipe 12 disposed on the feeding hopper 11, a first filter 13 connected to the feeding hopper 11, a circulating nitrogen pipeline 21, a make-up air pipe 22 connected to the nitrogen pipeline 21, an exhaust pipe 23 connected to the nitrogen pipeline 21, a compressor 24 disposed on the nitrogen pipeline 21, a filter device 25 disposed on the nitrogen pipeline 21, and a buffer tank 26 disposed on the nitrogen pipeline 21; the first filter 13 is connected to the nitrogen pipeline 21 and disposed upstream of the filter device 25, the filter device 25 is disposed upstream of the compressor 24, and the buffer tank 26 is disposed downstream of the compressor 24. Specifically, during use, materials are fed into the feeding hopper 11 through the feeding pipe 12. During this process, the compressor 24 extracts dust and air from the feeding hopper 11 through the first filter 13. Because there is a high concentration of nitrogen in the nitrogen pipeline 21, the probability of dust explosion is significantly reduced due to the low oxygen concentration in the nitrogen pipeline 21. Furthermore, the nitrogen in the nitrogen pipeline 21 is circulated and does not require real-time replenishment; it only needs to be replenished through the air supply pipe 22 according to the oxygen concentration in the nitrogen pipeline 21. The filter device 25 prevents unfiltered dust from entering the compressor 24, the buffer tank 26 can hold some of the air drawn in from the feeding hopper 11, and the exhaust pipe 23 can discharge the accumulated high-pressure gas in the nitrogen pipeline 21. This device can not only directly absorb the dust generated during the feeding process, preventing it from escaping into the air and protecting workers' health, but also prevent environmental dust explosions. Furthermore, the intermittent injection of nitrogen into the circulation pipeline can not only reduce the amount of nitrogen used, but also reduce the oxygen concentration in the nitrogen pipeline 21, thereby reducing the risk of dust explosions in the pipeline.

[0019] The filtering device 25 in the embodiment comprises a pair of second filters 251 arranged in parallel. The inlet and outlet of the pair of second filters 251 are provided with first valves 252. Specifically, the pair of second filters 251 are arranged to facilitate replacement of the second filters 251. When the filters need to be replaced, the first valves 252 at both ends of the second filters 251 need to be closed first.

[0020] The nitrogen pipeline 21 in the embodiment is provided with a second valve 27, which is arranged between the filtering device 25 and the buffer tank 26. Specifically, by adjusting the opening degree of the second valve 27, the flow rate through the second valve 27 can be adjusted, and thus the circulating flow rate of nitrogen in the nitrogen pipeline 21 can be adjusted.

[0021] The exhaust pipe 23 in the embodiment is provided with a third valve 28, and the exhaust pipe 23 is provided with a dust removal tank 29. Specifically, before the gas in the nitrogen pipeline 21 is discharged through the exhaust pipe 23, the dust in the gas is removed through the dust removal tank 29.

[0022] The air supplement pipe 22 in the embodiment is connected to the outlet end of the first filter 13. Specifically, after a certain period of operation, air can be injected into the first filter 13 in the reverse direction through the air supplement pipe 22, so that the material adsorbed on the first filter 13 is blown into the feeding bin 11, thereby preventing the first filter 13 from being blocked.

[0023] The connection between the air supplement pipe 22 and the nitrogen pipeline 21 in the embodiment is provided with a fourth valve 210, and the connection between the air supplement pipe 22 and the first filter 13 is provided with a fifth valve 14.

[0024] The nitrogen pipeline 21 in the embodiment is provided with an oxygen concentration meter 211 and a differential pressure meter 212; the oxygen concentration meter 211 and the differential pressure meter 212 are arranged upstream of the filtering device 25. Specifically, the oxygen concentration in the nitrogen pipeline 21 can be detected by the oxygen concentration meter 211. When the oxygen concentration is too high, nitrogen can be added in time through the air supplement pipe 22 (the gas in the nitrogen pipeline 21 needs to be discharged),

[0025] In summary, the dust explosion prevention system for the bisphenol A feeding station in the embodiment is used to feed the material into the feeding bin 11 through the feeding pipe 12, and in the process, the compressor 24 can extract the dust and air in the feeding bin 11 through the first filter 13. Since there is a high concentration of nitrogen in the nitrogen pipeline 21, the air and dust (part of the dust that is not filtered by the first filter 13) enter the pipeline. Since the oxygen concentration in the nitrogen pipeline 21 is very low, the probability of dust explosion is significantly reduced. The nitrogen in the nitrogen pipeline 21 is in a circulating flow, and it is not necessary to update it in real time. It only needs to be supplemented according to the high and low oxygen concentration in the nitrogen pipeline 21. The nitrogen in the nitrogen pipeline 21 is supplemented through the air supplement pipe 22. The unfiltered dust can be prevented from entering the compressor 24 through the filtering device 25. The buffer tank 26 can accommodate part of the air sucked from the feeding bin 11. The accumulated high-pressure gas in the nitrogen pipeline 21 can be discharged through the exhaust pipe 23. Through the device, not only can the dust generated in the feeding process be directly absorbed, but also the dust can be prevented from escaping into the air, protecting the health of workers and avoiding environmental dust explosion. In addition, the nitrogen is intermittently injected into the circulating pipeline, which not only reduces the amount of nitrogen used, but also reduces the oxygen concentration in the nitrogen pipeline 21 and the risk of dust explosion in the pipeline.

[0026] The preferred embodiments of the utility model are described above, and the utility model is not limited to the above. Those skilled in the art can make various modifications and changes to the utility model. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A dust explosion prevention system for a bisphenol A feeding station, characterized in that: The device comprises a feeding bin (11), a feeding pipe (12) arranged on the feeding bin (11), a first filter (13) communicated with the feeding bin (11), a nitrogen pipeline (21) arranged in a circulation mode, a gas supplement pipe (22) connected with the nitrogen pipeline (21), an exhaust pipe (23) connected with the nitrogen pipeline (21), a compressor (24) arranged on the nitrogen pipeline (21), a filtering device (25) arranged on the nitrogen pipeline (21), and a buffer tank (26) arranged on the nitrogen pipeline (21). The first filter (13) is connected with the nitrogen pipeline (21) and arranged upstream of the filtering device (25), the filtering device (25) is arranged upstream of the compressor (24), and the buffer tank (26) is arranged downstream of the compressor (24).

2. The dust explosion prevention system for a bisphenol A feeding station according to claim 1, characterized in that: The filtering device (25) comprises a pair of second filters (251) arranged in parallel.

3. The dust removal and explosion prevention system for a bisphenol A feeding station according to claim 2, characterized in that: The inlet and outlet of the pair of second filters (251) are each provided with a first valve (252).

4. The dust explosion prevention system for a bisphenol A feeding station of claim 1, characterized in that: A second valve (27) is arranged on the nitrogen pipeline (21) and between the filtering device (25) and the buffer tank (26).

5. The dust explosion prevention system for a bisphenol A feeding station of claim 1, characterized in that: A third valve (28) is arranged on the exhaust pipe (23), and a dust removal tank (29) is arranged on the exhaust pipe (23).

6. The dust explosion prevention system for a bisphenol A feeding station of claim 1, wherein: The gas supplement pipe (22) is connected with the outlet end of the first filter (13).

7. The dust explosion prevention system for a bisphenol A feeding station according to claim 6, characterized in that: A fourth valve (210) is arranged at the connection between the gas supplement pipe (22) and the nitrogen pipeline (21), and a fifth valve (14) is arranged at the connection between the gas supplement pipe (22) and the first filter (13).

8. The dust explosion prevention system for a bisphenol A feeding station of claim 1, wherein: An oxygen concentration instrument (211) and a differential pressure instrument (212) are arranged on the nitrogen pipeline (21) and upstream of the filtering device (25).

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