Pulse back-blowing dust remover

Abstract

The utility model discloses a pulse back-blowing dust remover which comprises a shell, a dust removal unit is arranged in the middle of the shell, a dust removal assembly used for filtering dust is arranged in the dust removal unit, a dust removal subarea is arranged above the dust removal unit, airflow enters the dust removal subarea through the dust removal assembly, and the dust removal subarea is communicated with an exhaust pipeline through a stop valve. The side face of the shell is provided with an air inlet communicated with the air purification chamber, the air inlet is provided with an inwards-opened air door, the air door comprises a door plate, the upper end side of the door plate is hinged to the shell, the door plate is provided with a balance weight and a sealing strip, and closing and sealing of the air door can be achieved by means of self weight. A position sensor is arranged at the door plate to detect opening and closing and opening degree of the door plate, a pulse blowing assembly is arranged above the dust removal unit, the position of the door plate is sensed through the position sensor, and opening or closing of a stop valve and pulse back blowing are controlled. And high-pressure air is saved, the ash removal capability is high, the dust removal efficiency is high, the energy consumption is low, and the operation is stable and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of dust collectors, and particularly relates to a pulse jet dust collector. Background Art

[0002] To control dust pollution, dust collectors are usually used. There are many types of dust collectors, and most of them adopt a filtration method, and the filter elements are filter bags, sintered plastic plates, etc. The dusty air flow enters the clean air chamber and is discharged through the exhaust pipe after filtration. The dust is intercepted on the surface of the filter bag or sintered plastic plate. The more dust is intercepted, the lower the dust removal efficiency. Pulse jet is a common dust cleaning method. High-pressure air passes through the pulse solenoid valve to perform reverse jetting on the filter bag and sintered plastic plate to clean the intercepted dust, and the fallen dust is finally collected by the ash hopper. After the dust cleaning is completed, the filtration efficiency of the filter bag or sintered plastic plate is restored.

[0003] Pulse jet usually adopts differential pressure control or time control. For differential pressure control, the differential pressure between the clean air chamber and the exhaust chamber is detected. After the differential pressure reaches the set value, the pulse valve is controlled to perform reverse jet dust cleaning. If zone control is adopted, multiple sets of differential pressure controllers are required, which increases the cost of the dust collector. In addition, the dust in the air flow will block the pipeline for transmitting air pressure with a certain probability, resulting in distorted pressure detection, thereby affecting the efficiency of reverse jet dust cleaning. For time control, the interval time of jetting is fixed. This control method is not flexible enough and the dust cleaning efficiency is low. Therefore, this application proposes a control method for zone pulse jet and a dust collector applying this control method. Summary of the Utility Model

[0004] The purpose of the utility model patent is to provide a pulse jet dust collector, which can overcome the deficiencies of the existing pulse jet control method.

[0005] The utility model adopts the following technical solutions: A pulse jet dust collector includes a housing. A dust removal unit is arranged in the middle of the housing. A dust removal component for filtering dust is arranged in the dust removal unit. Above the dust removal unit is a dust removal zone. The air flow passes through the dust removal component and enters the dust removal zone. The dust removal zone is communicated with the exhaust pipe through a stop valve. Below the dust removal unit is a clean air chamber. An air inlet communicating with the clean air chamber is arranged on the side of the housing. An inward-opening air door is arranged at the air inlet. The air door includes a door panel. The upper end side of the door panel is hinged to the housing. A counterweight and a sealing strip are installed on the door panel, and the air door can be closed and sealed by relying on its own weight. A position sensor is arranged at the door panel to detect the opening, closing and opening degree of the door panel. A pulse jet component is arranged above the dust removal unit. By sensing the position of the door panel through the position sensor, the stop valve and the pulse jet are controlled to be opened or closed.

[0006] Further, an installation plate for fixedly connecting the outer shell is provided on the outer side of the door panel. The installation plate is provided with an arc-shaped strip groove, and the center of the strip groove coincides with the pivot axis of the door panel. A first limit sensor and a second limit sensor are respectively fixed at the fully open and fully closed positions of the air damper on the strip groove.

[0007] Further, a limit screw for restricting the maximum opening of the door panel is threadedly connected to one end of the installation plate away from the outer shell.

[0008] Further, a plurality of mutually independent and partitioned clean air chambers, dust removal units and dust removal zones are provided inside the outer shell. Each dust removal unit communicates with an independent clean air chamber and a dust removal zone, and a plurality of pulse jet components are evenly distributed in each dust removal zone.

[0009] Further, the pulse jet component is connected to a high-pressure air tank. The pulse jet component includes a jet pipe and a pulse solenoid valve. The jet position of the jet pipe corresponds to the filter unit of the dust removal component, and the pulse solenoid valve is arranged on the high-pressure air tank.

[0010] Further, the stop valve includes a cylinder and a valve, and the opening and closing of the stop valve are realized by controlling the movement of the cylinder through a solenoid valve.

[0011] Further, the dust removal component is installed on the flower plate, and the dust removal component uses a sintered plastic plate as a filter element.

[0012] Further, a dust hopper is connected to the lower end of the outer shell. The upper opening of the dust hopper communicates with the clean air chamber, and a dust discharge valve is installed at the lower ash outlet of the dust hopper.

[0013] Further, an air inlet chamber is provided on the side of the outer shell. The clean air chamber is provided with an air inlet pipe. The air inlet chamber communicates with the clean air chamber through an air damper, and the air inlet chamber communicates with the dust hopper.

[0014] The utility model has the following beneficial effects compared with the prior art:

[0015] By sensing the opening of the air damper, the utility model controls the start and stop of the pulse jet in each dust removal zone, can efficiently clean the dust intercepted by the dust removal component, and at the same time saves high-pressure air. The dust collector applying this control method has strong ash cleaning ability, high dust removal efficiency, low energy consumption, stable and reliable operation, meets the national environmental protection requirements, has high economic benefits, and is worthy of being popularized and used. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the front view of the internal structure of the utility model;

[0017] Figure 2 is the side view of the internal structure of the utility model;

[0018] Figure 3 is the front view of the overall structure of the utility model;

[0019] Figure 4 It is the left view of the overall structure of the present utility model;

[0020] Figure 5 It is the right view of the overall structure of the present utility model;

[0021] Figure 6 It is the schematic diagram of the fully open air damper of the present utility model;

[0022] Figure 7 It is the schematic diagram of the half-open air damper of the present utility model;

[0023] Figure 8 It is the schematic diagram of the fully closed air damper of the present utility model;

[0024] Figure 9 It is the schematic diagram of the structure of the globe valve of the present utility model.

[0025] In the figure: 1, intake pipeline; 2, intake chamber; 3, air damper; 301, first air damper; 302, second air damper; 303, third air damper; 31, hinge; 32, door panel; 33, limit screw; 34, counterweight; 35, first limit sensor; 36, second limit sensor; 37, sealing strip; 4, ash hopper; 5, ash discharge valve; 6, clean gas chamber; 7, dust removal unit; 701, first dust removal unit; 702, second dust removal unit; 703, third dust removal unit; 8, high-pressure gas tank; 9, dust removal partition; 901, first dust removal partition; 902, second dust removal partition; 903, third dust removal partition; 10, pulse jet assembly; 11, globe valve; 12, exhaust pipeline. Specific embodiments

[0026] In order to better understand the purpose, structure and function of the present utility model, the following further describes in detail a pulse jet dust collector of the present utility model with reference to the accompanying drawings.

[0027] As Figures 1 to 5As shown, this embodiment provides a pulse back-blowing dust collector, including a shell, a plurality of dust removal units 7 are arranged in the middle of the shell, a plurality of dust removal components for filtering dust and purifying air are evenly arranged in the dust removal unit 7, a plurality of dust removal partitions 9 are arranged above the dust removal unit 7, a plurality of clean air chambers 6 are arranged below the dust removal unit 7, a plurality of clean air chambers 6, a plurality of dust removal units 7 and a plurality of dust removal partitions 9 are independent and isolated from each other, each dust removal unit 7 is connected to an independent clean air chamber 6 and a dust removal partition 9, and a pulse spray component 10 is evenly distributed in each dust removal partition 9. A plurality of pulse spray components 10 are all connected to a high-pressure gas tank 8, and the spray hole of each pulse spray component 10 corresponds to the dust removal unit 7. During the spraying process, the high-pressure airflow can quickly blow away the dust on the outer surface of the dust removal unit 7. A plurality of mutually isolated dust removal partitions 9 are respectively provided with stop valves 11 and connected to an exhaust pipe 12, and the exhaust pipe 12 merges and discharges all the purified air, and a plurality of stop valves 11 can control the on and off of the dust removal partition 9 and the exhaust pipe 12.

[0028] In this embodiment, the clean air chamber 6 includes a first clean air chamber, a second clean air chamber and a third clean air chamber, the dust removal unit 7 includes a first dust removal unit 701, a second dust removal unit 702 and a third dust removal unit 703, the dust removal partition 9 includes a first dust removal partition 901, a second dust removal partition 902 and a third dust removal partition 903, and the number of the stop valves 11 corresponds to the number of the dust removal partitions 9. The stop valve 11 includes a cylinder and a valve, and the opening and closing of the stop valve 11 is controlled by a solenoid valve, and the interface of the solenoid valve is connected to the cylinder. A next-door air pipe joint is provided above the exhaust pipe 12, which is used to connect the solenoid valve and the cylinder of the stop valve 11.

[0029] like Figure 1 and Figure 2 As shown, the side of the shell is provided with an air inlet connected to the clean air chamber 6, and the air inlet is provided with an inwardly opened damper 3. The number of dampers 3 is the same as the number of clean air chambers 6, including a first damper 301, a second damper 302 and a third damper 303.

[0030] like Figures 6 to 8 As shown, the damper 3 includes a door panel 32, which is connected to the shell through a hinge 31 arranged on the upper end side and can be rotated to open. A counterweight 34 and a sealing strip 37 are installed on the door panel 32, and the damper 3 can be closed and sealed by its own weight. A position sensor is arranged at the door panel 32 to detect the opening and closing and the opening degree of the door panel 32. The position of the door panel 32 is sensed by the position sensor to control the opening or closing of the stop valve 11 and the pulse backblowing.

[0031] like Figure 1 As shown, an air inlet chamber 2 is provided on the side of the housing, and the air inlet chamber 2 is connected to an air inlet duct 10 . The air inlet duct 10 guides the dust-laden airflow to each clean air chamber 6 . The air inlet chamber 2 is connected to the clean air chamber 6 through a damper 3 .

[0032] The dusty air flow enters the intake chamber 2 from the intake pipe 1, passes through the air damper 3 and enters the clean air chamber 6. After being purified and filtered by the dust removal unit 7, the air flow enters the dust removal partition 9. After passing through the shut-off valve 11, the air flow converges in the exhaust pipe 12 and is discharged into the atmosphere.

[0033] A dust hopper 4 is provided at the lower end of the housing. The dust hopper 4 is communicated with the intake chamber 2 and the clean air chamber 6. A dust discharge port is provided on the dust hopper 4, and a dust discharge valve 5 is provided on the dust discharge port. The dust on the dust removal unit 7 falls into the dust hopper 4, and the dust discharge valve 5 at the bottom discharges the dust concentratedly to the outside of the dust collector.

[0034] In this embodiment, as Figures 6 to 8 shown, an installation plate fixedly connecting the housing is provided on the outer side of the door panel 32. The installation plate is provided with an arc-shaped strip groove. The center of the strip groove coincides with the pivot axis of the door panel 32. The first limit sensor 35 and the second limit sensor 36 are respectively fixed at the fully open and fully closed positions of the air damper 3 on the strip groove. A limit screw 33 is threadedly connected to the end of the installation plate far from the housing, which can adjust the maximum opening degree and the maximum opening position of the air damper 3, and the limit sensors are adjusted according to the actual situation.

[0035] In this embodiment, the dust removal assembly uses a sintered plastic plate as the filter element, and the dust removal assembly is installed on the flower plate. The pulse jet assembly 10 includes a jet pipe and a pulse solenoid valve. The pulse solenoid valve is provided on the high-pressure gas tank 8, and the jet position of the jet pipe corresponds to the filter unit of the dust removal assembly.

[0036] As Figure 9 shown, the shut-off valve 11 is of a butterfly valve structure. The movement of the cylinder is controlled by an electromagnetic valve to realize the rotation and opening or closing of the butterfly valve. The opening degree of the air damper 3 is sensed by a position sensor to control the opening and closing of the shut-off valve 11 and the pulse solenoid valve.

[0037] The air damper 3 is the only way for the air flow to enter the clean air chamber 6 from the intake chamber 2. The kinetic energy of the air flow can open the air damper 3. The greater the air flow rate, the greater the opening degree of the air damper 3 until the air damper 3 is in a fully open state. At this time, the first limit sensor 35 will receive the opening signal of the air damper 3. When the dust intercepted by the dust removal unit 7 above the clean air chamber 6 becomes more, the air flow resistance becomes larger, and more air flow will flow to the clean air chamber 6 with smaller resistance. At this time, the opening degree of the air damper 3 becomes smaller, and the first limit sensor 35 will not receive the opening signal. In this state, the shut-off valve 11 corresponding to the dust removal partition 9 above the clean air chamber 6 is closed, so that the dust removal partition 9 and the clean air chamber 6 become a static pressure area. The air damper 3 is in a fully closed state under the action of the counterweight, and the corresponding pulse jet assembly 10 performs back blowing operation to clean the dust intercepted on the surface of the dust removal unit 7. During the back blowing process, each clean air chamber 6 and dust removal partition 9 are isolated from each other and can work independently.

[0038] In this embodiment, by sensing the position of the air damper and controlling the zoned pulse backwashing, the control cost is reduced and the operation reliability is improved. Further optimizing the zoned pulse backwashing and dust cleaning function and applying it to the dust removal equipment can improve the dust removal efficiency and reduce the operation cost, which is worthy of being popularized and used. By sensing the opening degree of the air damper to control the start of zoned pulse backwashing, the dust intercepted by the sintered plate filter unit can be efficiently cleaned, the consumption of compressed air can be saved, the control cost can be reduced, and the dust removal efficiency can be improved.

[0039] In summary, this control method can realize the online backwashing and dust cleaning operation of each dust removal zone, with a simple structure and reliable operation. The dust collector applying this control method has a higher dust removal efficiency, a longer service life of the dust removal unit, and reduces the practical cost of the dust collector, which is worthy of being popularized and used.

[0040] It can be understood that the present utility model is described through some embodiments. As is known to those skilled in the art, without departing from the spirit and scope of the present utility model, various changes or equivalent substitutions can be made to these features and embodiments. Additionally, under the teaching of the present utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application belong to the scope protected by the present utility model.

Claims

1. A pulse reverse blow dust collector, characterized in that, It includes a housing. A dust removal unit is arranged in the middle of the housing. A dust removal component for filtering dust is provided in the dust removal unit. Above the dust removal unit is a dust removal partition area. The air flow passes through the dust removal component and enters the dust removal partition area. The dust removal partition area is communicated with an exhaust pipe through a shut-off valve. Below the dust removal unit is a clean air chamber. An air inlet communicating with the clean air chamber is provided on the side of the housing. An inward-opening air damper is arranged at the air inlet. The air damper includes a door panel. The upper end side of the door panel is hinged to the housing. A counterweight and a sealing strip are installed on the door panel. The door can be closed and sealed by relying on its own weight. A position sensor is arranged at the door panel to detect the opening, closing and opening degree of the door panel. A pulse jetting component is arranged above the dust removal unit. The position of the door panel is sensed by the position sensor to control the opening or closing of the shut-off valve and the pulse back blowing.

2. The pulse jet dust collector according to claim 1, wherein An installation plate fixedly connected to the housing is arranged on the outer side of the door panel. The installation plate is provided with an arc-shaped strip groove. The center of the strip groove coincides with the pivot axis of the door panel. A first limit sensor and a second limit sensor are respectively fixed at the fully open and fully closed positions of the air damper on the strip groove.

3. The pulse jet dust collector according to claim 2, wherein A limit screw for restricting the maximum opening degree of the door panel is threadedly connected to one end of the installation plate away from the housing.

4. The pulse jet dust collector according to any one of claims 1 to 3, characterized in that, A plurality of mutually independent and partitioned clean air chambers, dust removal units and dust removal partition areas are arranged in the housing. Each dust removal unit communicates with an independent clean air chamber and a dust removal partition area. A plurality of pulse jetting components are evenly distributed in each dust removal partition area.

5. The pulse jet dust collector according to claim 4, characterized in that, The pulse jetting component is communicated with a high-pressure gas tank. The pulse jetting component includes a jetting pipe and a pulse solenoid valve. The jetting position of the jetting pipe corresponds to the filtering unit of the dust removal component. The pulse solenoid valve is arranged on the high-pressure gas tank.

6. The pulse jet reverse air filter according to claim 5, characterized in that, The shut-off valve includes a cylinder and a valve. The opening and closing of the shut-off valve are realized by controlling the movement of the cylinder through a solenoid valve.

7. The pulse jet dust collector according to claim 1, characterized in that, The dust removal component is installed on a ceiling plate. The dust removal component uses a sintered plastic plate as a filtering element.

8. The pulse jet dust collector according to claim 1, characterized in that, The lower end of the housing is connected with a dust hopper. The upper opening of the dust hopper is communicated with the clean air chamber. A dust discharging valve is installed at the lower ash outlet of the dust hopper.

9. The pulse jet dust collector according to claim 8, wherein An air inlet chamber is arranged on the side of the housing. An air inlet pipe is arranged in the clean air chamber. The air inlet chamber is communicated with the clean air chamber through an air damper. The air inlet chamber is communicated with the dust hopper.

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