Bag type filter for silicon dioxide powder

Abstract

The utility model discloses a silicon dioxide powder bag type filter which comprises a bag type filter body, silicon dioxide powder, a gas inlet, a gas outlet, a bag type filter bag, a tube plate for fixing the filter bag, a gas pipeline for backwashing the filter bag and a piston ring for fixing the filter bag, the silicon dioxide powder, the gas inlet and the gas outlet are formed in the bag type filter body; the tube plate for fixing the filter bag is arranged in the bag filter body, and the filter bag of the bag filter is fixed on the tube plate for fixing the filter bag through the piston ring for fixing the filter bag; the filter bag backwashing gas pipeline is fixedly arranged in the bag type filter body, extends out of the bag type filter body and is externally connected with a gas source through a backwashing gas inlet, and a backwashing gas outlet nozzle is arranged on the filter bag backwashing gas pipeline and faces a filter bag of the bag type filter. The utility model relates to the technical field of filtering equipment, and can solve the problem that in the prior art, the internal pressure of a bag filter body rises, so that a filter bag of a bag filter floats upwards.

Description

TECHNICAL FIELD

[0001] The utility model relates to filter equipment technical field especially relates to a silicon dioxide powder bag filter. BACKGROUND

[0002] Silica is widely used as an additive in silicone, adhesive and other materials, which is an important substance that can increase the viscosity of materials, give materials thixotropy and improve the mechanical properties of materials. Among them, especially the fumed silica prepared by flame hydrolysis method, also known as pyrogenic silica, can be used as an additive for high value-added silicone rubber and adhesive. The diameter of the primary particles of fumed silica is about 5-50 nm, which is very small and easy to scatter under the blowing of gas.

[0003] In the production process of silica, many gases will flow into the silica bin, such as air conveying gas responsible for conveying silica into the bin and sealing gas responsible for preventing silica powder from being damp in the bin. With the change of silica production conditions, the amount of gas flowing into the bin will have a large fluctuation.

[0004] Because silica powder is easy to scatter, a bag filter is usually arranged above the bin to collect and separate silica, thereby preventing silica from being mixed into the gas discharged outside the bin. The lower part of the bag filter body is silica powder and gas inlet, which is directly connected with the bin, so the pressure on the outer surface of the bag filter bag (filtering side) is consistent with the pressure inside the bin. The bag filter bag is made of resin and is in a cylindrical shape. When installing the bag filter bag, the bag filter bag is inserted into the hole in the filter bag fixing pipe plate from top to bottom and is fixed.

[0005] Since the bag filter bag is made of soft resin material and is not directly and firmly fixed on the filter bag fixing pipe plate by using screws and other fasteners, a filter bag fixing expansion ring is installed on the upper part of the bag filter bag, which fixes the bag filter bag on the filter bag fixing pipe plate through the filter bag fixing expansion ring. When silica powder adheres to the outer surface of the bag filter bag, the filtering efficiency of the bag filter bag will decrease, which leads to the increase of the internal pressure of the bag filter body. When the silica production conditions change, the amount of gas flowing into the bin may increase sharply, at this time the pressure inside the bin will rise rapidly, thereby causing the internal pressure of the bag filter body to rise rapidly. The increase of the internal pressure of the bag filter body will cause the filter bag fixing expansion ring to loosen, thereby causing the bag filter bag to lose fixation and float up.

[0006] Meanwhile, since the proficiency of each worker in installing the bag filter filter bag is different, the firmness of each bag filter filter bag and the fixed position of the bag filter filter bag are also different. When the firmness of the bag filter filter bag is low or the bag filter filter bag is fixed at a position that is directly impacted by the inflowing gas, the bag filter filter bag may float up when the pressure inside the bin is low.

[0007] When the pressure difference between the inside and outside of the bag filter body reaches a certain degree, the bag filter filter bag floats up, the expansion ring for fixing the filter bag loosens, and the silica leaks out from the gap between the floating bag filter filter bag and the tube plate for fixing the filter bag. Once the above leakage occurs, the bag filter body needs to be opened for cleaning, and then the floating bag filter filter bag is fixed back to the original position. This operation not only reduces the production efficiency, but also may pollute the environment. Therefore, it is necessary to provide a silica powder bag filter which can solve the problem of floating of the bag filter filter bag caused by the increase of the internal pressure of the bag filter body in the prior art. SUMMARY

[0008] The purpose of the present application is to provide a silica powder bag filter which can solve the problem of floating of the bag filter filter bag caused by the increase of the internal pressure of the bag filter body in the prior art.

[0009] The present application is implemented as follows:

[0010] A silica powder bag filter, comprising a bag filter body, a silica powder, a gas inlet, a gas outlet, a bag filter filter bag, a tube plate for fixing the filter bag, a gas pipeline for backwashing the filter bag, and an expansion ring for fixing the filter bag; the silica powder and the gas inlet are arranged at the bottom of the bag filter body, and the gas outlet is arranged at one side of the top of the bag filter body; the tube plate for fixing the filter bag is arranged in the bag filter body, which divides the bag filter body into two chambers, and the silica powder, the gas inlet and the gas outlet are respectively located in the two chambers; a plurality of bag filter filter bags are fixed at the reserved holes of the tube plate for fixing the filter bag by the expansion ring for fixing the filter bag and are inserted into the chamber where the silica powder and the gas inlet are located; the gas pipeline for backwashing the filter bag is fixedly arranged in the bag filter body and located in the chamber where the gas outlet is located, one end of the gas pipeline for backwashing the filter bag extends to the outside of the bag filter body and is connected to the gas source through the backwashing gas inlet, a plurality of backwashing gas outlet nozzles are arranged on the gas pipeline for backwashing the filter bag, and the plurality of backwashing gas outlet nozzles respectively face the plurality of bag filter filter bags.

[0011] The filter bag backwashing gas pipeline is provided with a filter bag anti-floating clamp on the filter bag backwashing gas pipeline fixing clamp, the filter bag anti-floating clamp clamps the bag filter filter bag, and the bag filter filter bag is fixed below the filter bag backwashing gas pipeline.

[0012] The bag filter body is provided with a communication pest control device pipeline, the communication pest control device pipeline communicates with a chamber where the silica powder and the gas inlet are located; the communication pest control device pipeline is externally connected with a pest control device and is provided with a safety valve.

[0013] The set pressure of the safety valve is the same as the design pressure of the bag filter body.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] 1、 the utility model discloses a filter bag backwashing gas pipeline, and the filter bag backwashing gas pipeline introduces backwashing airflow through a backwashing gas inlet and sprays to the bag filter filter bag through a backwashing gas outlet nozzle, can remove the silica powder adhered on the bag filter filter bag, guarantees the filtering effect of the bag filter filter bag, avoids the problem that the internal pressure of the bag filter body rises due to the decline of the filtering capacity of the bag filter filter bag, and further solves the floating problem of the bag filter filter bag, also solves the problem that the silica powder leaks from the gas outlet of the bag filter, avoids the open cleaning of the bag filter body and environmental pollution, and realizes the continuous collection and separation of silica.

[0016] 2、 the utility model discloses a filter bag anti-floating clamp and filter bag backwashing gas pipeline fixing clamp, can fix the bag filter filter bag below the filter bag backwashing gas pipeline, utilizes the fixed installation of the filter bag backwashing gas pipeline on the bag filter body, guarantees the firm and stable installation of the bag filter filter bag in the bag filter body, thereby solving the floating problem of the bag filter filter bag, also solving the problem that the silica powder leaks from the gas outlet of the bag filter, avoiding the open cleaning of the bag filter body and environmental pollution, and realizing the continuous collection and separation of silica.

[0017] 3、 the utility model discloses a safety valve and communication pest control device pipeline, and the set pressure of the safety valve is the same as the design pressure of the bag filter body, when the internal pressure of the bag filter body rises, the safety valve is automatically opened, and the excess pressure is released to the pest control device through the communication pest control device pipeline, guaranteeing the safety and continuous operation of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1is the structural schematic view of the silica powder bag filter of the utility model (install the filter bag backwash gas pipeline) ;

[0019] Figure 2 is Figure 1 is the backwash partial view of the single bag filter filter bag in the silica powder bag filter of the utility model;

[0020] Figure 3 is the reinforcing schematic view of the single bag filter filter bag in the silica powder bag filter of the utility model;

[0021] Figure 4 is the reinforcing side view of the single bag filter filter bag in the silica powder bag filter of the utility model;

[0022] Figure 5 is the reinforcing top view of the single bag filter filter bag in the silica powder bag filter of the utility model;

[0023] Figure 6 is the structural schematic view of the silica powder bag filter of the utility model (install the safety valve and the communication pest control equipment pipeline).

[0024] In the figure, 1 is the bag filter body, 2 is the silica powder and gas inlet, 3 is the gas outlet, 4 is the bag filter filter bag, 5 is the filter bag fixing pipe plate, 6 is the filter bag backwash gas pipeline, 7 is the backwash gas inlet, 8 is the filter bag fixing expansion ring, 9 is the backwash gas outlet nozzle, 10 is the filter bag anti-floating clamp, 11 is the filter bag backwash gas pipeline fixing clamp, 12 is the safety valve, 13 is the communication pest control equipment pipeline. DETAILED DESCRIPTION

[0025] The utility model will be further described in connection with the drawings and specific embodiments.

[0026] Please refer to the drawings Figure 1 and the drawings Figure 2The utility model provides a kind of silica powder bag filter, including bag filter body 1, silica powder, gas inlet 2, gas outlet 3, bag filter filter bag 4, filter bag fixed with pipe plate 5, filter bag backwashing gas pipeline 6 and filter bag fixed with ring 8;Silica powder, gas inlet 2 is arranged at the bottom of bag filter body 1, and gas outlet 3 is arranged at the top side of bag filter body 1;Filter bag fixed with pipe plate 5 is arranged in bag filter body 1, and bag filter body 1 is divided into two chambers, and silica powder, gas inlet 2 and gas outlet 3 are located in two chambers respectively;A plurality of bag filter filter bags 4 are fixed in the reserved hole of filter bag fixed with pipe plate 5 by filter bag fixed with ring 8 and are inserted in the chamber where silica powder, gas inlet 2 are located;Filter bag backwashing gas pipeline 6 is fixed in bag filter body 1 by screw and is located in the chamber where gas outlet 3 is located, one end of filter bag backwashing gas pipeline 6 extends to the outside of bag filter body 1 and is connected with gas source by backwashing gas inlet 7, a plurality of backwashing gas outlet nozzles 9 are arranged on filter bag backwashing gas pipeline 6 at intervals, and a plurality of backwashing gas outlet nozzles 9 are respectively arranged towards a plurality of bag filter filter bags 4.

[0027] By the arrangement of filter bag backwashing gas pipeline 6, gas source supplies backwashing airflow to filter bag backwashing gas pipeline 6 through backwashing gas inlet 7 regularly, and the backwashing airflow is sprayed into bag filter filter bag 4 from backwashing gas outlet nozzle 9, so that the silica powder adhered to bag filter filter bag 4 can be removed, the situation that the pressure in bag filter body 1 rises due to the reduction of the filtering efficiency of bag filter filter bag 4 can be avoided, and the problem that bag filter filter bag 4 floats up due to the pressure rise in bag filter body 1 is solved.

[0028] Preferably, the number and arrangement position of backwashing gas outlet nozzle 9 can be determined according to the number and arrangement position of bag filter filter bag 4, and backwashing gas outlet nozzle 9 is arranged one-to-one with bag filter filter bag 4 to ensure the backwashing effect.

[0029] Please refer to the accompanying drawings Figure 3 to the accompanying drawings Figure 5 , the filter bag backwashing gas pipeline 6 is provided with a clamp 10 for preventing the filter bag from floating up through a filter bag backwashing gas pipeline fixing clamp 11, the clamp 10 for preventing the filter bag from floating up clamps the bag filter filter bag 4, so that the bag filter filter bag 4 is fixed below the filter bag backwashing gas pipeline 6.

[0030] The filter bag backwashing gas pipeline fixing clamp 11 can be adaptively selected according to the shape and size of the filter bag backwashing gas pipeline 6, and can be clamped on the filter bag backwashing gas pipeline 6. The prevent filter bag floating clamp 10 and the filter bag backwashing gas pipeline fixing clamp 11 can adopt an integrated structure or a split fixing connection structure, and the prevent filter bag floating clamp 10 can be adaptively arranged according to the shape and size of the bag filter filter bag 4, and can be clamped on the bag filter filter bag 4, so that the bag filter filter bag 4 is fixed below the filter bag backwashing gas pipeline 6.

[0031] Since the filter bag backwashing gas pipeline 6 is fixed on the bag filter body 1 by screws, the floating and horizontal displacement of the bag filter filter bag 4 can be avoided, and the bag filter body 1 is not affected by the internal pressure.

[0032] Preferably, the prevent filter bag floating clamp 10 can be designed as a handle, so that the bag filter filter bag 4 can be more conveniently held by hand when the bag filter filter bag 4 is installed or removed, and the operation is more convenient.

[0033] Please refer to the accompanying drawings Figure 6 The bag filter body 1 is provided with a communication pest control device pipeline 13, which is in communication with a chamber in which the silica powder and the gas inlet 2 are located; the communication pest control device pipeline 13 is provided with a safety valve 12, and the communication pest control device pipeline 13 is externally connected to a pest control device.

[0034] Although the floating of the bag filter filter bag 4 can be prevented by backwashing and clamping fixation, if the internal pressure of the bag filter body 1 exceeds the design pressure, the equipment may also be damaged. Therefore, by setting the normally closed safety valve 12, when the internal pressure of the bag filter body 1 reaches or exceeds the design pressure of the bag filter body 1, the safety valve 12 is opened to release pressure, and the gas is discharged to the pest control device through the safety valve 12 and the communication pest control device pipeline 13, so as to prevent the internal pressure of the bag filter body 1 from rising, and to achieve the purpose of protecting the safety of the equipment.

[0035] The set pressure of the safety valve 12 is the same as the design pressure of the bag filter body 1.

[0036] Preferably, the safety valve 12 can adopt a gas pressure type valve body, and the set pressure threshold of the safety valve 12 is set as the design pressure of the bag filter body 1. When the internal pressure of the bag filter body 1 reaches the design pressure, the safety valve 12 is started to open to release pressure, and the safe operation of the equipment is ensured.

[0037] Please refer to the accompanying drawings Figure 1 to Figure 6 The working process and working principle of the utility model are as follows:

[0038] The silica powder and the gas enter the bag filter body 1 through the silica powder and the gas inlet 2, and the silica powder is filtered by the bag filter filter bag 4, and the filtered waste gas is discharged through the gas outlet 3.

[0039] After the bag filter body 1 runs for a period of time, the silica powder is attached in the bag filter filter bag 4, which may cause the filtration capacity of the bag filter filter bag 4 to decrease. At this time, the backwashing gas inlet 7 can be opened to introduce a backwashing gas flow, the backwashing gas flow is sprayed into the bag filter filter bag 4 through the backwashing gas outlet nozzle 9 of the filter bag backwashing gas pipeline 6, and the silica powder attached in the bag filter filter bag 4 is backwashed. After the silica powder attached to the bag filter filter bag 4 is removed by backwashing, the pressure difference of the bag filter filter bag 4 can be reduced, thereby avoiding the problem of the bag filter filter bag 4 floating up caused by the internal pressure of the bag filter body 1 rising, and the waste gas after backwashing is discharged to the atmosphere through the gas outlet 3.

[0040] However, when the internal pressure of the bag filter body 1 rises due to changes in silica production conditions and other factors, the bag filter filter bag 4 can be reinforced by the setting of the filter bag anti-floating clamp 10 and the filter bag backwashing gas pipeline fixing clamp 11, thereby further avoiding the problem of the bag filter filter bag 4 floating up. At the same time, the safety valve 12 is automatically opened to release the excess pressure, the waste gas is discharged to the decontamination equipment through the communication decontamination equipment pipeline 13, and the pressure in the bag filter body 1 is normal, thereby ensuring the safe and continuous operation of the equipment.

[0041] The above is only a preferred embodiment of the present application, and is not used to limit the protection scope of the present application, therefore, any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A silica powder baghouse filter characterized by: The bag filter body (1), the silica powder, the gas inlet (2), the gas outlet (3), the bag filter filter bag (4), the filter bag fixing pipe plate (5), the filter bag backwashing gas pipeline (6) and the filter bag fixing expansion ring (8) are included; the silica powder and the gas inlet (2) are arranged at the bottom of the bag filter body (1), and the gas outlet (3) is arranged at one side of the top of the bag filter body (1); the filter bag fixing pipe plate (5) is arranged in the bag filter body (1), and the bag filter body (1) is divided into two chambers, and the silica powder, the gas inlet (2) and the gas outlet (3) are located in the two chambers respectively; a plurality of bag filter filter bags (4) are fixed at the reserved holes of the filter bag fixing pipe plate (5) by the filter bag fixing expansion ring (8) and inserted into the chamber where the silica powder and the gas inlet (2) are located; the filter bag backwashing gas pipeline (6) is fixedly arranged in the bag filter body (1) and located in the chamber where the gas outlet (3) is located, one end of the filter bag backwashing gas pipeline (6) extends to the outside of the bag filter body (1) and is connected with the gas source through the backwashing gas inlet (7), a plurality of backwashing gas outlet nozzles (9) are arranged on the filter bag backwashing gas pipeline (6) at intervals, and the plurality of backwashing gas outlet nozzles (9) respectively face the plurality of bag filter filter bags (4).

2. The silica powder baghouse filter of claim 1, characterized by: The filter bag backwashing gas pipeline (6) is provided with a filter bag floating prevention clamp (10) through a filter bag backwashing gas pipeline fixing clamp (11), the filter bag floating prevention clamp (10) clamps the bag filter filter bag (4), and the bag filter filter bag (4) is fixed below the filter bag backwashing gas pipeline (6).

3. The silica powder baghouse filter of claim 1, wherein: The bag filter body (1) is provided with a communication pest control equipment pipeline (13), the communication pest control equipment pipeline (13) communicates with the chamber where the silica powder and the gas inlet (2) are located; the communication pest control equipment pipeline (13) is provided with a safety valve (12), and the communication pest control equipment pipeline (13) is connected with the pest control equipment.

4. A silica powder baghouse filter according to claim 3, characterized by: The set pressure of the safety valve (12) is the same as the design pressure of the bag filter body (1). The set pressure of the safety valve (12) is the same as the design pressure of the bag filter body (1).

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