Powder collecting device

Abstract

The utility model relates to the technical field of blast furnace ironmaking equipment, in particular to a powder collecting device which comprises a filtering box body, and an air outlet and an air inlet are formed in the two sides of the filtering box body respectively. The purified air induced draft fan is arranged on one side of the air outlet; the filtering assembly is arranged in the filtering box body; the back flushing box body is arranged at the top of the filtering box body; the reverse blowing assembly is arranged on the reverse blowing box body; and the pulverized coal collecting hopper is arranged at the bottom of the filtering box body. The back-blowing assembly is arranged, external air is introduced into the filter box body through the pulsator, coal dust on the filter assembly is blown off, mechanical moving parts, back-blowing fans and compressed air storage tanks are reduced, the later labor intensity of workers is reduced, and the equipment failure rate is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of blast furnace ironmaking equipment, in particular to a powder collecting device. Background Art

[0002] Injecting pulverized coal into the blast furnace to replace part of the coke can, on the one hand, save the investment in coking, build fewer coke ovens, and reduce air pollution caused by coking; on the other hand, it can greatly relieve the tight supply and demand situation of coking coal.

[0003] When processing pulverized coal, a filter with a dust removal cloth bag is required for filtration. Often, after the filter cloth bag is used many times, too many small particles of pulverized coal will adhere to the surface of the filter cloth bag. At this time, the filter cloth bag needs to be subjected to powder collection treatment. In the prior art, the filter with a dust removal cloth bag usually sets mechanical moving parts, a reverse blower and a compressed air storage tank. First, by driving the mechanical moving parts, the dust adhering to the dust removal bag falls into the dust removal hopper below. Secondly, a reverse blower is set to introduce the compressed air in the compressed air storage tank, and the reverse blower is used to blow the compressed air to move the dust removal bag, and then the tiny dust adhering to the dust removal bag is blown off. Its powder collection steps are more, making the later maintenance more cumbersome, and at the same time being restricted by the compressed air. Summary of the Utility Model

[0004] The utility model provides a powder collecting device, which sets a reverse blowing assembly to introduce external air into the filter box body through a pulsator, so as to blow off the filter assembly, reduce the setting of mechanical moving parts, a reverse blower and a compressed air storage tank, reduce the later labor intensity of personnel, and reduce the equipment failure rate.

[0005] To achieve the above object, the utility model provides a powder collecting device, including:

[0006] A filter box body, in which a plurality of filter chambers are arranged, a purification chamber is arranged at a position close to the top of the filter box body, a clean air outlet is opened between the bottom of the purification chamber and the filter chamber, and an exhaust port and an air inlet are respectively arranged on both sides of the filter box body;

[0007] A clean air induced draft fan, which is arranged on one side of the exhaust port;

[0008] A filter assembly, a plurality of which are arranged, and the filter assemblies are respectively arranged in the filter chambers;

[0009] A reverse blowing box body, which is arranged on the top of the purification chamber, and a pulsating air flow port is opened between the reverse blowing box body and the purification chamber;

[0010] Blowing-back assembly, the blowing-back assembly is arranged on the blowing-back box body, the blowing-back assembly includes a cylinder valve, a pulsator and a pulsator transmission mechanism, the cylinder valves are uniformly arranged on the inner part of the blowing-back box body at a certain distance, the cylinder valves are used to separate the purification chamber and the inner cavity of the blowing-back box body, one end of the blowing-back box body is connected to the pulsator, and the pulsator is matched with the pulsator transmission mechanism;

[0011] Coal powder collecting hopper, the coal powder collecting hopper is arranged at the bottom of the filtering box body.

[0012] Furthermore, the powder collecting device further includes a controller, and the cylinder valve, the pulsator transmission mechanism and the clean gas induced draft fan are all connected to the controller.

[0013] Furthermore, the filtering component includes a cloth bag pressing frame, a filter bag supporting parallel skeleton, a wide flat cloth bag, a filter bag supporting triangular skeleton, a cage and a cloth bag pressing strip, the wide flat cloth bag includes a plurality of parallel cloth bags, the wide flat cloth bag is arranged outside the filter bag supporting parallel skeleton, the filter bag supporting triangular skeletons are uniformly arranged on both sides of the wide flat cloth bag, the cloth bag pressing strip is arranged at the bottom of the wide flat cloth bag, after the wide flat cloth bag is installed with the cloth bag pressing strip, it is arranged in the cage, and the cloth bag pressing frame is arranged at the top of the wide flat cloth bag to fix the wide flat cloth bag.

[0014] Furthermore, the cylinder valve includes a cylinder and a valve plate, the moving end of the cylinder is connected to one end of the valve plate, when the cylinder valve is in the initial state, the valve plate is arranged at the pulsating air flow port.

[0015] Furthermore, the coal powder collecting hopper includes an ash discharging hopper, a manhole and a bursting hole, the ash discharging hopper is arranged at the bottom of the filtering box body, the bursting hole is arranged on the side of the ash discharging hopper close to the filtering box body, and the manhole is arranged on the side of the ash discharging hopper close to the bottom of the ash discharging hopper.

[0016] Compared with the prior art, a powder collecting device according to an embodiment of the present invention filters the gas containing coal powder, filters and collects large particle coal powder, and purifies the gas at the same time. However, after the filtering component filters for a period of time, the filtering effect of the filtering component becomes poor, and it is necessary to clean and collect the coal powder attached to the filtering component. Among them, by setting a blowing-back assembly, the blowing-back assembly includes a cylinder valve, a pulsator and a pulsator transmission mechanism. By closing the clean gas outlet between the filtering box body and the purification chamber, external air is introduced to form a blowing-back air flow to clean the coal powder on the filtering component, so that the coal powder enters the coal powder collecting hopper below, and then the coal powder is collected, reducing the installation of the original mechanical moving parts, the air blower and the compressed air storage tank, thereby reducing the failure rate of the device and simplifying the operation process of the staff. Description of the Drawings

[0017] Figure 1 The overall front view structural schematic diagram of a powder collection device of the present utility model;

[0018] Figure 2 is Figure 1 the partial enlarged view of area A in

[0019] Figure 3 the front view structural schematic diagram of a filter assembly of a powder collection device of the utility model;

[0020] Figure 4 The overall left view structural schematic diagram of a powder collection device of the present utility model;

[0021] Figure 5 is Figure 4 the partial enlarged view of area B in

[0022] Reference numerals:

[0023] 1000. Filter box body; 1100. Purification chamber; 1200. Air inlet; 1300. Filter chamber;

[0024] 2000. Filter assembly; 2100. Cloth bag pressing frame; 2200. Filter bag support parallel skeleton; 2300. Wide flat cloth bag; 2400. Filter bag support triangular skeleton; 2500. Bag cage; 2600. Cloth bag pressing strip;

[0025] 3000. Reverse blowing box body;

[0026] 4000. Reverse blowing assembly; 4100. Cylinder valve; 4110. Cylinder; 4120. Valve plate;

[0027] 4200. Pulsator; 4300. Pulsator transmission mechanism;

[0028] 5000. Pulverized coal collection hopper; 5100. Ash discharge hopper; 5200. Manhole; 5300. Blasting hole;

[0029] 6000. Pulsating air flow port; 7000. Clean air outlet port. Specific embodiments

[0030] To further understand the purpose, structure, characteristics and functions of the present utility model, the following is a detailed description in conjunction with the embodiments.

[0031] As Figures 1-5 shown, a powder collection device provided according to an embodiment of the present utility model includes: a filter box body 1000, a clean air induced draft fan, a filter assembly 2000, a reverse blowing box body 3000, a reverse blowing assembly 4000 and a pulverized coal collection hopper 5000;

[0032] On both sides of the filter housing 1000, an air inlet 1200 and an air outlet are provided. A purification chamber 1100 is arranged at the central position near the top of the filter housing 1000. A plurality of filter chambers 1300 are arranged inside the filter housing 1000. The filter assembly 2000 is arranged in the filter chamber 1300, and the backwashing housing 3000 is arranged on the top of the purification chamber 1100. At the same time, the backwashing assembly 4000 is arranged on the backwashing housing 3000. The backwashing assembly 4000 includes a cylinder valve 4100, a pulsator 4200 and a pulsator transmission structure 4300. The cylinder valve 4100 can isolate the inner cavity of the backwashing housing 3000 from the purification chamber 1100. One end of the backwashing housing 3000 is connected to the pulsator 4200, and the pulsator transmission mechanism 4300 is connected to the pulsator 4200. Finally, the pulverized coal collecting hopper 5000 is arranged at the bottom of the filter housing 1000;

[0033] Among them, when a powder collecting device of the present utility model filters a gas containing pulverized coal for a long time, the air flow direction is as Figure 1 shown by the solid arrows in the figure. After filtering for a period of time, the filtering effect of the filter assembly 2000 becomes poor. At this time, it is necessary to collect the small particle pulverized coal attached to the filter assembly 2000, so as to change the filtering effect of the filter assembly 2000. During the ash cleaning process, the pulsator transmission mechanism 4300 always opens the pulsator 4200, but the ash cleaning is carried out for each filter chamber 1300 one by one. Among them, a single cylinder valve 4100 is started, and the valve plate 4120 of the cylinder valve 4100 descends from the pulsating air port 6000 to the clean air outlet 7000, so as to isolate the purification channel below the purification chamber 1100 from the filter chamber 1300, so that the inner cavity of the backwashing housing 3000 is communicated with the filter chamber 1300, thereby realizing the communication between the inner cavity of the backwashing housing 3000 and the inside of the filter housing 1000. At this time, because the clean air induced draft fan at the exhaust port is in the air extraction working state and the air inlet 1200 is closed, the inside of the filter housing 1000 is in a negative pressure state, and external air will be quickly and automatically sucked into the inside of the filter housing 1000. At this time, the external air forms a pulsating air flow through the pulsator 4200 ( Figure 1 and Figure 2 the arrows with dotted lines in the figure). The pulsating air flow blows towards the filter assembly 2000 of the corresponding single filter chamber 1300, and the pulsating air flow pulsatingly cleans the pulverized coal attached to the filter assembly 2000. The small particle coal dust detaches from the filter assembly 2000 and falls towards the pulverized coal collecting hopper 5000 below. This ash cleaning process is to clean each filter chamber 1300 one by one. After the ash cleaning of the corresponding filter chamber 1300 is completed, the cylinder valve 4100 of the next filter chamber 1300 is opened. After the pulverized coal to be cleaned falls into the ash discharge hopper, it is discharged by the star-shaped discharger arranged at the bottom of the ash discharge hopper.

[0034] Furthermore, the powder collection device further includes a controller. Among them, the cylinder valve 4100, the pulsator drive mechanism 4300, and the clean air induced draft fan are all connected to the controller. A PLC controller is set inside the controller. By setting a program in the PLC controller, for example, an operator pre-sets the filtering process time. During the filtering process, the PLC controller controls the operation of the cylinder valve 4100 and the pulsator drive mechanism 4300, and controls the clean air induced draft fan to start, so as to discharge the filtered gas by the clean air induced draft fan. When the working time exceeds the filtering process time, the PLC controller will enter the backwashing powder collection process. During the backwashing powder collection process, the PLC controller always controls the pulsator drive mechanism 4300 to rotate the pulsator 4200, and the backwashing cleaning cycle of a single filter chamber 1300 is 60S, including 55S of dust cleaning blowing and 5S of static dust. Among them, the PLC controller controls the cylinder valve 4100 on a single filter chamber 1300 to open, so that external air enters through the pulsator 4200 to form a pulsating air flow. The pulsating air flow enters the inside of the filter chamber 1300 through the pulsating air flow port 6000, so as to perform pulsating backwashing on the filter element 2000 of the filter chamber 1300, achieving the effect of cleaning the filter element 2000 and collecting pulverized coal. After the backwashing powder collection of a single filter chamber 1300 reaches the specified time of 55S, the PLC controller will control the valve plate 4120 of the cylinder valve 4100 of the corresponding filter chamber 1300 to lift, and at the same time control the valve plate 4120 of the cylinder valve 4100 of the next filter chamber 1300 to fall. At this time, the control time of the cylinder valve 4100 is 5S. This 5S interval forms the static time during the dust cleaning process. Subsequently, the PLC controller performs the dust cleaning program on the next single filter chamber 1300 until the filter elements 1300 in all filter chambers 1300 are cleaned up.

[0035] Preferably, the pulsating backwashing air flow formed by the external air entering through the pulsator 4200 is intermittent. A turntable is provided inside the pulsator 4200, and an opening is provided on the turntable. The pulsator drive mechanism 4300 controls the turntable inside the pulsator 4200. When the turntable rotates at a high speed and the opening of the turntable is communicated with the backwashing box body 3000, external air will enter the backwashing box body 3000 through the opening of the turntable inside the pulsator 4200 to form a pulsating backwashing air flow. When the opening of the turntable is not communicated with the backwashing box body 3000, external air cannot enter the backwashing box body 3000 at this time.

[0036] Furthermore, as Figure 3As shown in the figure, the filter component 2000 includes a cloth bag pressing frame 2100, a parallel filter bag support frame 2200, a wide flat cloth bag 2300, a triangular filter bag support frame 2400, a cage 2500, and a cloth bag pressing strip 2600. The wide flat cloth bag 2300 includes a plurality of parallel cloth bags. The wide flat cloth bag 2300 is arranged outside the parallel filter bag support frame 2200. The triangular filter bag support frames 2400 are evenly arranged on both sides of the wide flat cloth bag 2300. The cloth bag pressing strip 2600 is arranged at the bottom of the wide flat cloth bag 2300. After the cloth bag pressing strip 2600 is installed on the wide flat cloth bag 2300, the wide flat cloth bag 2300 is arranged inside the cage 2500. The cloth bag pressing frame 2100 is arranged at the top of the wide flat cloth bag 2300 and fixes the wide flat cloth bag 2300. Among them, the wide flat cloth bag 2300 includes a plurality of parallel cloth bags, so that a single wide flat cloth bag 2300 has a small volume, a large air handling capacity, and a good dust cleaning effect under the same filtration area. The cloth bag pressing frame 2100, the parallel filter bag support frame 2200, the triangular filter bag support frame 2400, the cage 2500, and the cloth bag pressing strip 2600 all assist in fixing the wide flat cloth bag 2300.

[0037] Further, as Figure 2 and Figure 5 shown, the cylinder valve 4100 includes a cylinder 4110 and a valve plate 4120. Among them, the moving end of the cylinder 4110 is connected to one end of the valve plate 4120. When the cylinder valve 4110 is in the initial state, the valve plate 4120 is arranged at the pulsating air flow port 6000. The valve plate 4120 is located at the pulsating air flow port 6000, and the valve plate 4120 is used to isolate the reverse blowing box 3000 and the purification chamber 1100. When the dust cleaning process is carried out, when the cylinder 4110 descends, the moving rod of the cylinder 4110 moves downward, and the moving rod of the cylinder 4110 drives the valve plate 4120 to move downward, so that the reverse blowing box 3000 and the purification chamber 1100 are communicated. At the same time, the valve plate 4120 is located at the clean air outlet 7000, and the clean air channel below the purification chamber 1100 is isolated from the filtration chamber 1300.

[0038] Further, as Figure 1 and Figure 4 shown, the pulverized coal collecting hopper 5000 includes an ash discharge hopper 5100, a manhole 5200, and a bursting hole 5300. The ash discharge hopper 5100 is arranged at the bottom of the filter box 1000. The bursting hole 5300 is arranged on the side of the ash discharge hopper 5100 close to the filter box 1000, and the manhole 5200 is arranged on the side of the ash discharge hopper 5100 close to the bottom of the ash discharge hopper 5100. The ash discharge hopper 5100 is used to collect pulverized coal, the manhole 5200 is used for manual treatment of the blockage problem of the ash discharge hopper 5100, and the bursting hole 5300 is used to observe the internal situation of the ash discharge hopper 5100 and prevent the internal pressure of the filter box 1000 and the ash discharge hopper 5100 from being too high.

[0039] In the description of the present utility model, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" orientation or positional relationship are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0040] The present utility model has been described by the above related embodiments. However, the above embodiments are only examples for implementing the present utility model. It must be pointed out that the disclosed embodiments do not limit the scope of the present utility model. On the contrary, modifications and refinements made without departing from the spirit and scope of the present utility model fall within the scope of patent protection of the present utility model.

Claims

1. A powder collecting device, characterized in that: include: A filter box, wherein a plurality of filter chambers are arranged in the filter box, a purification chamber is arranged near the top of the filter box, a clean air outlet is arranged between the bottom of the purification chamber and the filter chamber, and an exhaust port and an air inlet are arranged on both sides of the filter box; A clean air induced draft fan, the clean air induced draft fan is arranged on one side of the exhaust port; A filter assembly, wherein a plurality of filter assemblies are provided and each of the filter assemblies is disposed in the filter chamber respectively; A backflush box, wherein the backflush box is arranged at the top of the purification chamber, a pulsating air flow opening is provided between the backflush box and the purification chamber, and the backflush box is connected with the purification chamber through the pulsating air flow opening; A back-blowing assembly, the back-blowing assembly is arranged on the back-blowing box, the back-blowing assembly includes a cylinder valve, a pulsator and a pulsator transmission mechanism, the cylinder valve is evenly arranged on the back-blowing box at a certain distance, the cylinder valve is used to separate the purification chamber and the inner cavity of the back-blowing box, one end of the back-blowing box is connected to the pulsator, and the pulsator cooperates with the pulsator transmission mechanism; A coal powder collecting hopper is arranged at the bottom of the filter box.

2. The powder collecting device according to claim 1, characterized in that: It also includes a controller, and the cylinder valve, the pulsator transmission mechanism and the clean air induced draft fan are all connected to the controller.

3. The powder collecting device according to claim 1, characterized in that: The filter assembly includes a bag pressing frame, a filter bag supporting parallel frame, a wide flat cloth bag, a filter bag supporting triangular frame, a bag cage and a bag pressure strip. The wide flat cloth bag includes a plurality of parallel cloth bags. The wide flat cloth bag is arranged outside the filter bag supporting parallel frame. The filter bag supporting triangular frame is evenly arranged on both sides of the wide flat cloth bag. The bag pressure strip is arranged at the bottom of the wide flat cloth bag. After the wide flat cloth bag is installed with the bag pressure strip, it is arranged in the bag cage. The bag pressing frame is arranged on the top of the wide flat cloth bag to fix the wide flat cloth bag.

4. The powder collecting device according to claim 2, characterized in that: The cylinder valve comprises a cylinder and a valve plate, wherein the movable end of the cylinder is connected to one end of the valve plate, and when the cylinder valve is in an initial state, the valve plate is arranged at the pulsating air flow port.

5. The powder collecting device according to claim 1, characterized in that: The coal powder collecting hopper includes an ash hopper, a manhole and a blasting hole. The ash hopper is arranged at the bottom of the filter box body, the blasting hole is arranged on the side of the ash hopper close to the filter box body, and the manhole is arranged on the side of the ash hopper close to the bottom of the ash hopper.

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