Fireproof and explosion-proof silicon powder bag-type dust collector

Abstract

The utility model discloses a fireproof and explosion-proof silicon powder bag-type dust collector which comprises a bag-type dust collector, a pressure sensor, a temperature sensor, a controller, an alarm and a fire hose, pressure sensors are respectively arranged in the upper part and the lower part of the bag-type dust collector, a temperature sensor is arranged in the bag-type dust collector, a fire-fighting water pipe is arranged at the upper part in the bag-type dust collector, and a spray head is arranged at the water outlet end of the fire-fighting water pipe; the signal output ends of the two pressure sensors and the signal output ends of the temperature sensors are all connected with the signal input end of the controller through signals, and the signal output end of the controller is connected with the signal input end of the alarm through signals. The material bin has the advantages that the material bin is simple in structure and easy to implement, the production safety is effectively improved, and the risk of dust explosion in the material bin is eliminated; meanwhile, manual opening of the discharging valve for discharging is not needed, and time and labor are saved.

Description

Technical Field:

[0001] The utility model relates to the technical field of bag filters, and particularly relates to a fire and explosion-proof silicon powder bag filter. Background Art:

[0002] In the powder-making process of industrial silicon, a bag filter is used for dust recovery, that is, the dust generated by crushers and mills is collected by the bag filter. At present, although there are 5 aluminum plate pressure relief ports on the box body of the bag dust removal bin for pressure relief when the pressure reaches a certain level, when the explosion pressure is reached, the blasting aluminum plate cannot ensure accurate opening, and there is a high risk of flash fire. Moreover, all the dust collected by the bag filter is collected in the silo at the lower part of the bag filter by pulsed gas. When the silo is full of dust, the operator needs to manually open the discharge valve at the lower part of the silo, connect the dust to the ton bag, and manually close the discharge valve after unloading the dust. Since the diameter of the pipe above the discharge valve is large and the diameter of the pipe below is small, material jamming often occurs during the unloading process, and manual knocking and dredging are required, which is time-consuming and laborious and also poses a safety hazard. Since there is always dust left in the silo and there is no detection of important parameters such as temperature, pressure, and differential pressure inside the bag filter, when the temperature inside the bag filter is too high or ironware is mixed in and flash explosion occurs, the bag filter is extremely likely to explode, and the explosion-proof effect is poor; moreover, there is no fire extinguishing measure inside the existing bag filter, which poses a major safety hazard. Content of the Utility Model:

[0003] The purpose of the utility model is to provide a fire and explosion-proof silicon powder bag filter with a simple structure, time-saving and labor-saving, and improved production safety.

[0004] The utility model is implemented by the following technical solutions: The purpose of this patent is to provide a fire and explosion-proof silicon powder bag filter, which includes a bag filter, a pressure sensor, a temperature sensor, a controller, an alarm, and a fire water pipe; pressure sensors are respectively arranged inside the upper and lower parts of the bag filter, a temperature sensor is arranged inside the bag filter, the fire water pipe is arranged above the inside of the bag filter, and a spray head is arranged at the water outlet end of the fire water pipe; the signal output ends of the two pressure sensors and the temperature sensor are respectively connected to the signal input end of the controller through signals, and the signal output end of the controller is connected to the signal input end of the alarm through signals.

[0005] Further, a bursting disc is arranged on the pressure relief port of the bag filter.

[0006] Further, an automatic discharge valve is provided at the discharge opening of the bag filter; the automatic discharge valve includes a discharge box, a rotating shaft rotates horizontally in the discharge box, and a plurality of paddles are fixed on the surface of the rotating shaft in the discharge box along the radial direction of the rotating shaft; both ends of the rotating shaft movably penetrate the discharge box, and one end of the rotating shaft is in transmission connection with the output end of a driving motor fixed on one side of the discharge box.

[0007] Further, a photoelectric sensor is fixedly arranged on the other side of the discharge box, and an "L"-shaped baffle is fixed at the other end of the rotating shaft. The horizontal section of the baffle is fixed at the end of the rotating shaft, and the vertical section of the baffle movably blocks the light emitting end of the photoelectric sensor; the signal output end of the photoelectric sensor is signal-connected to the signal input end of the controller.

[0008] Advantages of the present utility model: 1. The structure of the present utility model is simple and easy to implement. By setting pressure sensors, temperature sensors and a controller, the two pressure sensors continuously monitor the pressures on the upper and lower sides of the bag filter and transmit them to the controller for calculating the pressure difference value. When the pressure difference value exceeds the range, it indicates that there is a risk of dust explosion inside the bag filter, and the controller controls the alarm to sound, and the operator operates the bag filter to stop; the temperature sensor continuously monitors the temperature inside the bag filter and transmits it to the controller. When the temperature is higher than the upper limit value, it indicates that there is a fire inside the bag filter, and the controller controls the alarm to sound, and the operator operates the bag filter to stop, and at the same time turns on the fire fighting water to cool down and extinguish the fire inside the bag filter, effectively improving the production safety.

[0009] 2. An automatic discharge valve is adopted. During the operation of the bag filter, the driving motor keeps running and drives the rotating shaft to rotate, and then drives the paddles to rotate, so that the dust removal powder in the silo of the bag filter is directly discharged into the lower ton bag, avoiding the existence of dust removal powder in the silo and eliminating the risk of dust explosion inside the silo; at the same time, there is no need for manual opening of the discharge valve for discharging, which saves time and effort. Description of the drawings:

[0010] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0011] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0012] Figure 2 It is a schematic diagram of the structure of the automatic discharge valve.

[0013] Bag dust collector 1, pressure sensor 2, temperature sensor 3, controller 4, alarm 5, fire hose 6, spray head 7, bursting disc 8, automatic discharge valve 9, blanking box 91, rotating shaft 92, paddle 93, drive motor 94, photoelectric sensor 95, baffle 96. Specific implementation mode:

[0014] Example: As Figure 1-2 shown, a fire and explosion proof silicon powder bag dust collector includes a bag dust collector 1, a pressure sensor 2, a temperature sensor 3, a controller 4, an alarm 5 and a fire hose 6; pressure sensors 2 are respectively arranged inside the upper and lower parts of the bag dust collector 1, a temperature sensor 3 is arranged inside the bag dust collector 1, a fire hose 6 is arranged above the inside of the bag dust collector 1, and a spray head 7 is arranged at the water outlet end of the fire hose 6; signal output ends of the two pressure sensors 2 and the temperature sensor 3 are signal-connected to a signal input end of the controller 4, and a signal output end of the controller 4 is signal-connected to a signal input end of the alarm 5.

[0015] The two pressure sensors 2 continuously monitor the pressures on the upper and lower sides of the bag dust collector 1 and transmit them to the controller 4 for calculating the pressure difference. When the pressure difference exceeds the set range, it indicates that there is a risk of dust explosion inside the bag dust collector 1. The controller 4 controls the alarm 5 to give an alarm, and the operator operates the bag dust collector 1 to stop. The temperature sensor 3 continuously monitors the temperature inside the bag dust collector 1 and transmits it to the controller 4. When the temperature is higher than the upper limit value, it indicates that a fire has occurred inside the bag dust collector 1. The controller 4 controls the alarm 5 to give an alarm, and the operator operates the bag dust collector 1 to stop. At the same time, the fire water is turned on to cool down and extinguish the fire inside the bag dust collector 1, effectively improving the production safety.

[0016] A bursting disc 8 is arranged at the pressure relief port of the bag dust collector 1. The bursting disc 8 is made of national standard aluminum alloy material. When the internal pressure of the bag dust collector 1 exceeds 0.01 MPa, the bursting disc 8 automatically opens for pressure relief. Compared with an aluminum plate, it can accurately open when the pressure inside the bag dust collector 1 reaches a certain level, reducing the risk of flash fire and explosion.

[0017] An automatic discharge valve 9 is arranged at the blanking port of the bag dust collector 1; the automatic discharge valve 9 includes a blanking box 91, a rotating shaft 92 rotates horizontally inside the blanking box 91, and a plurality of paddles 93 arranged radially along the rotating shaft 92 are fixed on the surface of the rotating shaft 92 inside the blanking box 91; both ends of the rotating shaft 92 movably penetrate through the blanking box 91, and one end of the rotating shaft 92 is in transmission connection with an output end of a drive motor 94 fixed on one side of the blanking box 91.

[0018] During the operation of the bag filter 1, the driving motor 94 keeps running, drives the rotating shaft 92 to rotate, and then drives the paddle 93 to rotate, so that the dust removal powder in the silo of the bag filter 1 is directly discharged into the lower ton bag, avoiding the presence of dust removal powder in the silo and eliminating the risk of internal dust explosion in the silo; at the same time, there is no need to manually open the discharge valve for discharging, saving time and effort.

[0019] On the other side of the feeding box 91, a photoelectric sensor 95 is fixedly arranged. At the other end of the rotating shaft 92, an "L"-shaped baffle 96 is fixed. The horizontal section of the baffle 96 is fixed at the end of the rotating shaft 92, and the vertical section of the baffle 96 is movably arranged to block the light emitting end of the photoelectric sensor 95; the signal output end of the photoelectric sensor 95 is signal-connected to the signal input end of the controller 4.

[0020] The photoelectric sensor 95 constantly detects the baffle 96 and transmits the signal to the controller 4. The rotating baffle 96 enables the photoelectric sensor 95 to detect the corresponding signal at regular intervals. When the baffle 96 cannot be detected for a long time or is detected for a long time, it indicates that the automatic discharge valve 9 has a fault. The controller 4 controls the alarm 5 to give an alarm, and the operator operates the bag filter 1 to stop, improving the working safety of the bag filter 1.

[0021] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A fireproof and explosion-proof silicon powder bag filter, characterized in that: It includes a bag dust collector, a pressure sensor, a temperature sensor, a controller, an alarm and a fire hose; pressure sensors are respectively arranged in the upper and lower parts of the bag dust collector, a temperature sensor is arranged in the bag dust collector, the fire hose is arranged above the bag dust collector, and a sprinkler head is arranged at the water outlet of the fire hose; the signal output ends of the two pressure sensors and the temperature sensor are connected with the signal input end of the controller through signals, and the signal output end of the controller is connected with the signal input end of the alarm through signals; an automatic unloading valve is arranged at the discharge port of the bag dust collector; the automatic unloading valve includes a discharge box, a rotating shaft is horizontally rotated in the discharge box, and a plurality of paddles arranged radially along the rotating shaft are fixed on the surface of the rotating shaft in the discharge box; both ends of the rotating shaft movably pass through the discharge box, and one end of the rotating shaft is transmission-connected with the output end of a driving motor fixed to one side of the discharge box.

2. A fireproof and explosion-proof silicon powder bag filter according to claim 1, characterized in that: A bursting membrane is arranged on the pressure relief port of the bag filter.

3. The fireproof and explosion-proof silicon powder bag filter according to claim 1, characterized in that: A photoelectric sensor is fixedly arranged on the other side of the discharge box, and an "L"-shaped baffle is fixed on the other end of the rotating shaft. The horizontal section of the baffle is fixed on the end of the rotating shaft, and the vertical section of the baffle is movably arranged on the light emitting end of the photoelectric sensor; the signal output end of the photoelectric sensor is connected with the signal input end of the controller through a signal.

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