Internal filtering type dust removal equipment

Abstract

The utility model discloses an internal filtration type dust removal equipment, including equipment body, filtration system, blowing system and reverse air suction system, equipment body is composed of steel support, shell, hanging beam, tubesheet and ash bucket, tubesheet divides the shell to form closed space, the shell below the tubesheet is connected with air inlet flue, the shell above the tubesheet is provided with purified air outlet, and the dust bucket is connected with the air inlet flue. The filter system comprises a plurality of filter bags, the plurality of filter bags are inversely arranged on the tubesheet, the bag openings of the filter bags are communicated with the lower part of the tubesheet, and the reverse air suction system comprises a cyclone dust collector, a reverse air suction fan, an ash silo, a reverse air suction pneumatic switch valve and an air inlet valve. According to the utility model, the mode of inversely installing the filter cartridge is adopted, the flue gas penetrates through the filter bag from the inside of the filter bag from bottom to top, and dust particles in the flue gas are filtered under the action of the filter bag, so that the aim of purifying the flue gas is fulfilled. The dust on the surface of the filter bag and floating dust in the equipment are thoroughly removed by adopting a dust removal mode of rotating pulse injection assisted reverse air suction, so that the long-term efficient and stable operation of the equipment is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of air purification, in particular to an internal filtering dust removal device. Background Art

[0002] In the non-electrical industries such as industrial silicon and glass, a large amount of fine and light dust particles are generated during the production process, and some dusts have a certain viscosity, such as the flue gas of industrial silicon furnace: ① The smoke is very fine and has a large area, and about 90% of it is less than 1um, and the smoke capacity is relatively light, only 200kg / m³; ② The main component of the smoke is SiO2, which has strong adhesion, high thermal resistance and resistivity. This type of dust is not only difficult to capture, but also difficult to clean, and it is easy to stick to the bag, causing high equipment resistance, and in severe cases, it causes blockage.

[0003] The traditional dust removal process uses a positive pressure / negative pressure reverse suction large bag dust collector. The dust cleaning principle is that the reverse suction airflow vibrates the filter bag to make the dust attached to the surface of the filter bag fall off. Since the reverse suction power is provided by the reverse suction fan, there is no induced airflow. In high-concentration dust or humid environments, the dust is not completely removed. Therefore, the normal operation resistance of the large bag dust collector is relatively high, the fan selection is large, and the energy consumption is high. Utility Model Content

[0004] In order to solve the above technical problems, the utility model designs an internal filtration dust removal device, which is suitable for flue gas conditions with small dust particle size, low density and certain viscosity, and is used to solve the problems of dust removal equipment being difficult to clean and high operating resistance, while reducing the investment cost and operating cost of the equipment.

[0005] The utility model adopts the following technical solutions:

[0006] An internal filtration dust removal device includes a device body, a filtering system, a blowing system and a reverse suction system. The device body is composed of a steel bracket, a shell, a hanging beam, a flower plate, and an ash hopper. The ash hopper is arranged at the bottom of the flower plate. The flower plate separates the closed space formed by the shell. The shell below the flower plate is connected to the air intake flue. The shell above the flower plate is provided with a purified air outlet. The filtering system includes a plurality of filter bags, which are invertedly installed on the flower plate. The bag openings of the filter bags are connected to the bottom of the flower plate. The blowing system includes a blowing valve and a blowing pipe. and air pipe, the spray pipe is installed between multiple filter bags on the flower plate, and is used to spray the outside of multiple filter bags. The reverse suction system includes a cyclone dust collector, a reverse suction fan, an ash bin, a reverse suction pneumatic switch valve and an air intake valve. The lower part of the flower plate is connected to the cyclone dust collector through a reverse suction pipeline, and a reverse suction pneumatic switch valve is installed on the reverse suction pipeline. The lower part of the cyclone dust collector is connected to the ash bin, and the upper part is connected to the reverse suction fan through a pipeline. The reverse suction fan is connected to the air intake duct through a pipeline, and an air intake valve is installed on the air intake duct. The internal filter dust removal equipment adopts an inverted filter cartridge method. The flue gas penetrates the filter bag from the bottom to the top, and the dust particles in the flue gas are filtered under the action of the filter bag to achieve the purpose of purifying the flue gas. The equipment adopts a rotary pulse spray-assisted reverse suction cleaning method to thoroughly remove the dust on the surface of the filter bag and the floating dust in the equipment, ensuring the long-term, efficient and stable operation of the equipment.

[0007] Preferably, the steel support is welded from steel sections and is used to support the entire dust removal equipment.

[0008] Preferably, the shell adopts a structural form of a steel sealing plate or a corrugated plate to form a closed container for sealing the smoke.

[0009] Preferably, a hanging cap is installed on the top of the filter bag and a bag seat is installed on the bottom of the filter bag. The hanging cap is made of flat steel rolled into a circle and welded to a steel plate, and is used to fix the top of the filter bag. The bag seat is made of flat steel rolled into a circle and welded to a fixing ring, and is used to fix the bag opening.

[0010] Preferably, the hanging beam is made of steel section for suspending the hanging cap; the flower plate is processed by laser cutting, and the bag seat is welded on the flower plate.

[0011] Preferably, the ash hopper is used to collect and store captured dust, and discharge the dust to the ash bin through the ash unloading device connected to its lower opening. The ash hopper is a hollow four-sided platform welded by plate reinforcement.

[0012] Preferably, the blowing system further comprises a motor and a bearing, the blowing pipe is rotatably connected to the top of the shell and the flower plate respectively through the bearing, the motor is placed on the top of the shell and connected to the blowing pipe to drive the blowing pipe to rotate.

[0013] Preferably, the air delivery pipe and the blowing pipe are connected by a pipeline and sealed by a buckle, and the blowing pipe can directly rotate freely in the pipe sleeve of the air delivery pipe, and the air delivery pipe delivers compressed air to the blowing pipe.

[0014] Preferably, the filter bags and the spray pipes are arranged with one pipe for four bags at intervals, and the spray pipes are rotated to spray the four groups of filter bags respectively.

[0015] Preferably, the filter bag is made of woven filter cloth or non-woven felt, and the dust-containing gas is filtered by utilizing the filtering effect of the fiber fabric.

[0016] The beneficial effects of the utility model are as follows: (1) the utility model adopts a rotary spraying method, the motor can drive the spray pipe to rotate, a single spray pipe can correspond to multiple filter bags, reduce the number of flower plate openings, reduce the risk of flower plate deformation, and at the same time reduce the number of spray pipes and equipment failures; (2) a combined cleaning method is adopted, first spraying to peel off the dust inside the filter cartridge, and then reverse suction is used to suck away the floating dust in the chamber. The dust is thoroughly cleaned, which can increase the rising flow rate of flue gas, reduce the size of equipment, and reduce investment costs; extend the interval time of filter cartridge spraying and the operating resistance of the equipment, improve the dust removal efficiency and reduce operating costs; (3) a cyclone dust collector is arranged in front of the reverse suction fan, which can effectively reduce the wear of the fan, not only extend the service life of the fan, but also remove part of the dust in the reverse suction wind and extend the resistance rising time of the chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 This is a schematic diagram of the installation of the filter bag in the utility model;

[0019] Figure 3 It is the layout diagram of the blowing pipe in the utility model;

[0020] Figure 4 It is a work flow chart of the utility model;

[0021] In the figure: 1. Equipment body, 2. Filtration system, 3. Blowing system, 4. Back-suction system, 2.1. Filter bag, 2.2. Suspension cap, 2.3. Bag seat, 3.1. Blowing pipe, 4.1. Cyclone dust collector, 4.2. Back-suction fan, 4.3. Ash storage, 4.4. Back-suction pneumatic switch valve, 4.5. Inlet valve. DETAILED DESCRIPTION

[0022] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0023] Example: Figure 1As shown, an internal filtration dust removal device includes a device body 1, a filtering system 2, a blowing system 3 and a reverse suction system 4. The device body is composed of a steel bracket, a shell, a hanging beam, a flower plate, and an ash hopper. The ash hopper is arranged at the bottom of the flower plate. The flower plate separates the closed space formed by the shell. The shell below the flower plate is connected to the air intake flue. The shell above the flower plate is provided with a purified air outlet. The filtering system includes a plurality of filter bags 2.1. The plurality of filter bags are invertedly installed on the flower plate. The bag openings of the filter bags are connected to the bottom of the flower plate. The blowing system includes a blowing valve, a blowing pipe 3.1 and The air delivery pipe and the blowing pipe are installed between the multiple filter bags on the flower plate and are used for blowing the outer sides of the multiple filter bags. The reverse suction system includes a cyclone dust collector 4.1, a reverse suction fan 4.2, an ash bin 4.3, a reverse suction pneumatic switch valve 4.4 and an air intake valve 4.5. The lower part of the flower plate is connected to the cyclone dust collector through a reverse suction pipeline, and a reverse suction pneumatic switch valve is installed on the reverse suction pipeline. The lower part of the cyclone dust collector is connected to the ash bin, and the upper part is connected to the reverse suction fan through a pipeline. The reverse suction fan is connected to the air intake duct through a pipeline, and the air intake valve is installed on the air intake duct.

[0024] The steel bracket is welded from steel sections and is used to support the entire dust removal equipment. The shell adopts the structure of steel sections plus sealing plates or corrugated plates to form a closed container for sealing flue gas.

[0025] like Figure 2 As shown, a hanging cap 2.2 is installed on the top of the filter bag, and a bag seat 2.3 is installed on the bottom of the filter bag. The hanging cap is made of flat steel rolled into a circle and welded to a steel plate, and is used to fix the top of the filter bag. The bag seat is made of flat steel rolled into a circle and welded to a fixing ring, and is used to fix the bag opening. The hanging beam is made of section steel, which is used to suspend the hanging cap; the flower plate is processed by laser cutting, and the bag seat is welded on the flower plate. The ash hopper is used to collect and store the captured dust, and discharge it to the ash bin through the ash unloading device connected to its lower port. The ash hopper is a hollow four-level platform welded by plate reinforcement.

[0026] The spray system also includes a motor and a bearing. The spray pipe is rotatably connected to the top of the shell and the flower plate through the bearing. The motor is placed on the top of the shell and connected to the spray pipe to drive the spray pipe to rotate.

[0027] The gas pipeline and the blowing pipe are connected through pipelines and sealed by buckles. The blowing pipe can rotate freely directly in the pipe sleeve of the gas pipeline. The gas pipeline transports compressed air to the blowing pipe.

[0028] like Figure 3 As shown in the figure, the filter bags and the blowing pipes are arranged in a way that one pipe is used for four bags at intervals. The blowing pipes are rotated to blow the four groups of filter bags respectively. The filter bags are made of textile filter cloth or non-textile felt, and the dust-containing gas is filtered by the filtering effect of the fiber fabric.

[0029] like Figure 4As shown, the flue gas enters the dust collector through the air inlet duct and enters the filter bag from bottom to top. The dust particles in the flue gas are blocked by the filter bag and adsorbed on the inner wall of the filter bag. The clean gas penetrates the filter bag and is discharged from the dust collector from the purified air outlet.

[0030] As the dust in the filter bag increases, the differential pressure above and below the filter cartridge gradually increases. When the dust in the filter bag reaches a certain amount, the differential pressure above and below the filter cartridge reaches the set value, the spray system starts, the pulse spray valve opens, and the compressed air is transported to the spray pipe through the delivery pipe and sprayed at the corresponding filter bag. The dust in the filter bag breaks away from the filter bag and falls into the ash hopper. After spraying one group, the motor starts and rotates with the spray pipe until it is aimed at the next group of filter bags. The pulse spray valve opens to spray this group of filter bags until all four groups of filter bags corresponding to the spray pipe are sprayed. The next group of pulse valves opens to spray the next group until all filter bags in this chamber are sprayed and the spray system stops working.

[0031] When the filter bag of this chamber is sprayed, the reverse suction fan starts interlockingly, and at the same time, the air inlet valve of this chamber is closed interlockingly, and the reverse suction pneumatic switch valve of this chamber is opened. The floating dust in the chamber due to the spraying is sucked out of the dust collector under the action of the reverse suction fan, first passes through the cyclone dust collector on the top of the ash bin to remove the dust in the reverse suction wind, and then is transported to the air intake flue in front of the dust collector through the reverse suction fan. According to the program setting, the reverse suction fan automatically shuts down after running for a period of time, and the reverse suction pneumatic switch valve is closed interlockingly, and the air inlet valve is opened. At this point, the dust cleaning of this chamber is completed, and the flue gas purification work continues.

[0032] The above-described embodiment is only a preferred solution of the present invention and does not limit the present invention in any form. There are other variations and modifications without exceeding the technical solution described in the claims.

Claims

1. An internal filtration dust removal device, characterized in that: It includes an equipment body, a filtering system, a spraying system and a reverse suction system. The equipment body is composed of a steel bracket, a shell, a hanging beam, a flower plate and an ash hopper. The ash hopper is arranged at the bottom of the flower plate. The flower plate separates the closed space formed by the shell. The shell below the flower plate is connected to the air intake flue. The shell above the flower plate is provided with a purified air outlet. The filtering system includes a plurality of filter bags, which are invertedly installed on the flower plate. The bag openings of the filter bags are connected to the bottom of the flower plate. The spraying system includes a spraying valve, a spraying pipe and a gas transmission pipe. The spray pipe is installed between multiple filter bags on the flower plate and is used to spray the outside of multiple filter bags. The reverse suction system includes a cyclone dust collector, a reverse suction fan, an ash bin, a reverse suction pneumatic switch valve and an air intake valve. The lower part of the flower plate is connected to the cyclone dust collector through a reverse suction pipeline, and a reverse suction pneumatic switch valve is installed on the reverse suction pipeline. The lower part of the cyclone dust collector is connected to the ash bin and the upper part is connected to the reverse suction fan through a pipeline. The reverse suction fan is connected to the air intake duct through a pipeline, and the air intake valve is installed on the air intake duct.

2. The internal filtration dust removal equipment according to claim 1 is characterized in that: The steel bracket is welded from steel sections and is used to support the entire dust removal equipment.

3. The internal filtration dust removal equipment according to claim 1 is characterized in that: The shell adopts the structural form of a steel sealing plate or a corrugated plate to form a closed container for sealing the smoke.

4. The internal filtration dust removal equipment according to claim 1 is characterized in that: A hanging cap is installed on the top of the filter bag, and a bag seat is installed on the bottom of the filter bag. The hanging cap is made by rolling flat steel into a circle and welding it to a steel plate, and is used to fix the top of the filter bag. The bag seat is made by rolling flat steel into a circle and welding it to a fixing ring, and is used to fix the bag opening.

5. The internal filtration dust removal equipment according to claim 4 is characterized in that: The hanging beam is made of steel and is used to suspend the hanging cap; the flower plate is processed by laser cutting, and the bag seat is welded on the flower plate.

6. The internal filtration dust removal equipment according to claim 1 is characterized in that: The ash hopper is used to collect and store captured dust, and discharge it to the ash bin through the ash unloading device connected to its lower opening.

7. The internal filtration dust removal equipment according to claim 1 is characterized in that: The spray system also includes a motor and a bearing. The spray pipe is rotatably connected to the top of the shell and the flower plate through the bearing. The motor is placed on the top of the shell and connected to the spray pipe to drive the spray pipe to rotate.

8. The internal filtration dust removal equipment according to claim 7 is characterized in that: The air delivery pipe and the blowing pipe are connected through a pipeline and sealed with a buckle. The blowing pipe can directly rotate freely in the pipe sleeve of the air delivery pipe, and the air delivery pipe delivers compressed air to the blowing pipe.

9. The internal filtration dust removal device according to claim 7, characterized in that: The filter bags and the spray pipes are arranged in a one-pipe-to-four-bag arrangement, and the spray pipes are rotated to spray the four groups of filter bags respectively.

10. The internal filtration dust removal equipment according to claim 1, characterized in that: The filter bag is made of woven filter cloth or non-woven felt, and utilizes the filtering effect of the fiber fabric to filter the dust-containing gas.

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