Furnace bag-type dust collector capable of efficiently cleaning ash

Abstract

The utility model relates to a furnace bag-type dust collector capable of efficiently cleaning ash, which comprises an upper box body, a middle box body and a lower box body which are sequentially arranged from top to bottom, an exhaust cavity is arranged in the upper box body, the furnace bag-type dust collector further comprises a lifting ash cleaning device, the lifting ash cleaning device comprises a lifting frame, an air box and a lifting mechanism, and the lifting frame is positioned in the exhaust cavity. The lifting frame is provided with a plurality of air supply pipelines arranged in the length direction of the upper box body in the width direction of the upper box body, air injection pipelines in one-to-one correspondence with the filter bags are arranged below the air supply pipelines, the lifting mechanism is arranged on the upper box body and drives the lifting frame to move up and down, and the air supply pipelines are located in the exhaust cavity when the lifting frame is located at the highest position; when the air supply pipelines are located at the lowest position, the lower ends of the air supply pipelines extend into the filter bags, the air box is fixed above the upper box body and supplies air to the air supply pipelines, and the air box is provided with an air inlet pipeline connected with a high-pressure air source. By adopting the scheme, the utility model provides the furnace bag-type dust collector capable of efficiently cleaning the ash, which can improve the fly ash trapping efficiency.

Description

Technical Field

[0001] The utility model relates to the field of garbage incineration equipment, in particular to a furnace bag dust collector with high-efficiency dust cleaning. Background Art

[0002] The waste incineration power plant collects domestic waste and incinerates it in a unified manner, using the heat from the incineration to generate electricity while treating the waste gas generated by the incineration in a unified manner, making rational use of resources while avoiding waste gas pollution. The furnace bag filter is a flue gas purification device connected to the boiler, which captures the fly ash contained in the waste gas.

[0003] A traditional furnace bag dust collector includes an upper box body, a middle box body and a lower box body which are arranged in sequence from top to bottom, an exhaust chamber is arranged in the upper box body, a filter bag chamber is arranged in the middle box body, a perforated plate is arranged between the exhaust chamber and the filter bag chamber, the perforated plate is provided with air holes arranged in a square array, a filter bag is arranged in the filter bag chamber, which corresponds to the air holes one by one and the bag opening is fixed to the air holes, an air inlet for dust-laden gas to enter is arranged on the side of the filter bag chamber near the bottom, an exhaust port for purified gas to discharge is arranged on the side of the exhaust chamber, the lower box body is hopper-shaped and is provided with a discharge chamber for collecting fly ash, a discharge valve is arranged at the bottom of the discharge chamber, and a pulse nozzle is also provided in the exhaust chamber opposite to the bag opening of the filter bag, which outputs pulse gas to the filter bag to shake the fly ash attached to the outside of the filter bag into the discharge chamber.

[0004] The above structure has certain disadvantages, namely, there is a certain distance between the pulse nozzle and the bag opening of the filter bag, which causes part of the gas ejected by the pulse nozzle to leak directly from the exhaust chamber, affecting the impact effect on the filter bag. Moreover, with the development of furnace bag dust collectors, the vertical length of the bags has gradually increased, further weakening the impact effect, making it impossible to completely shake off the fly ash attached to the outer side of the bottom of the bags, invisibly increasing the number of shutdowns for cleaning, thereby affecting the subsequent capture efficiency. In addition, the air supply pipe that provides gas to the pulse nozzle is arranged along the length direction of the upper box body. Due to the long length of the upper box body, the air pressure of the pulse nozzle delivered to the end of the air supply pipe is insufficient, which also affects the impact effect. Summary of the invention

[0005] In view of the shortcomings of the prior art, the utility model aims to provide a high-efficiency ash-cleaning furnace bag filter that improves fly ash capture efficiency.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: comprising an upper box body, a middle box body and a lower box body which are arranged in sequence from top to bottom, an exhaust chamber is arranged in the upper box body, a filter bag chamber is arranged in the middle box body, a perforated plate is arranged between the exhaust chamber and the filter bag chamber, the perforated plate is provided with ventilation holes arranged in a square array, a filter bag corresponding to the ventilation holes one by one and with the bag opening fixed to the ventilation holes is arranged in the filter bag chamber, an air inlet for dust-containing gas to enter is arranged on the side of the filter bag chamber close to the bottom, an exhaust port for purified gas to be discharged is arranged on the side of the exhaust chamber, the lower box body is hopper-shaped and is provided with a discharge chamber for collecting fly ash, and the bottom of the discharge chamber A discharge valve is provided in the upper part, and it also includes a lifting and cleaning device, the lifting and cleaning device includes a lifting frame, an air box and a lifting mechanism, the lifting frame is located in the exhaust chamber, the lifting frame is provided with a plurality of air supply pipes arranged along the length direction of the upper box body along the width direction of the upper box body, and jet pipes corresponding to the filter bags are provided below the air supply pipes, the lifting mechanism is provided on the upper box body and drives the lifting frame to move up and down, when the lifting frame is in the highest position, the air supply pipe is located in the exhaust chamber, and when it is in the lowest position, the lower end of the air supply pipe extends into the filter bag, the air box is fixed above the upper box body and supplies air to each air supply pipe respectively, and the air box is provided with an air intake pipe connected to the high-pressure air source.

[0007] By adopting the above technical solution, when dust cleaning is required, the lifting frame is driven down by the lifting mechanism, so that the lower end of the air supply pipe extends into the filter bag, and the high-pressure gas enters the air supply pipe through the air box and is ejected from the jet pipe, which impacts the filter bag, thereby realizing the dust cleaning function. After the dust cleaning is completed, the lifting frame is driven up by the lifting mechanism to restore the initial position. The above structure has the following advantages: ① When the jet pipe jets, the lower end of the jet pipe is located inside the filter bag. Compared with the traditional structure, the gas ejected will not leak into the exhaust chamber, thereby ensuring the impact effect, and the jet position is lower, and the impact covers a larger range of the filter bag; ② After the jet is completed, the jet pipe will return to the highest position, which reduces the impact on the gas flow at the bag mouth of the filter bag compared with the traditional structure, thereby ensuring the stable operation of the equipment; ③ The air box is transferred to the upper part of the upper box body with a larger area, so that the air box can provide sufficient gas at any time; ④ The setting direction of the air supply pipe is changed from the length direction to the width direction, which greatly shortens the length of the air supply pipe, makes the air supply of each jet pipe more sufficient and the air pressure more uniform, thereby ensuring the impact effect.

[0008] The utility model is further configured as follows: the lifting mechanism includes a cylinder fixed above the upper box body and a guide seat symmetrically arranged on both sides of the cylinder, a connecting rod is arranged between adjacent air supply pipes, the cylinder is driven downward to be provided with a cylinder shaft extending into the exhaust chamber and fixed to the connecting rod, the guide seat is vertically provided with a guide hole, and the guide hole is slidably provided with a guide rod extending into the exhaust chamber and fixed to the connecting rod.

[0009] By adopting the above technical solution, the cylinder cooperates with multiple guide rods to make the lifting of the lifting frame more stable, and the connecting rod connected to the air supply pipeline is used as the connection point with the cylinder shaft and the guide rod, making the strength of the connection more reliable.

[0010] The utility model is further configured as follows: the air box is arranged along the width direction of the upper box body, an air supply valve is arranged in front of the air box, and the air supply valve is located on the upper side wall of the exhaust cavity and is provided with an air supply joint connected to the upper side of the air supply pipeline through a hose.

[0011] By adopting the above technical solution, the air supply position of each air supply pipe is on the upper side, so that the air supply pressure of each jet pipe is more uniform. At the same time, the air supply connector of the air supply valve is located on the upper side wall of the exhaust chamber, which is convenient for plugging and unplugging the hose connected to the air supply pipe, making debugging and disassembly more convenient.

[0012] The utility model is further configured as follows: a one-way valve is arranged at the lower end of the jet pipeline.

[0013] By adopting the above technical solution and adding a one-way valve, on the one hand, it can prevent impurities from entering the jet pipe and causing blockage, and on the other hand, it can maintain a certain air pressure in the air supply pipe, thereby quickly ejecting high-pressure gas.

[0014] The utility model is further configured as follows: the one-way valve comprises a valve body, a flow channel is vertically penetrated through the valve body, a truncated cone cavity with a small end facing upward and a steel ball sealingly matched with the side wall of the truncated cone cavity are arranged in the flow channel, an adjusting bolt with threaded matching is arranged at the lower end of the flow channel, an air vent is vertically penetrated through the adjusting bolt, and a cylindrical spring is compressed between the upper end of the adjusting bolt and the steel ball.

[0015] By adopting the above technical scheme, the cylindrical spring acts on the steel ball, so that the steel ball maintains a sealing fit with the side wall of the truncated cone cavity, so that the gas can be ejected only after the air pressure in the air supply pipeline exceeds the set value. At the same time, the cylindrical spring is compressed by the easily disassembled adjusting bolt. On the one hand, it is easy to replace the cylindrical spring after fatigue to ensure the sealing effect. On the other hand, by replacing cylindrical springs of different specifications, the jet air pressure set value can be adjusted to make the control more precise. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional diagram of a specific implementation of the utility model;

[0017] Figure 2 It is a cross-sectional view of a specific implementation mode of the utility model;

[0018] Figure 3 for Figure 2 A magnified view of middle;

[0019] Figure 4 It is a three-dimensional diagram of the lifting and cleaning device;

[0020] Figure 5 for Figure 3 Enlarged view of B. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] like Figure 1 — Figure 5As shown, the utility model discloses a highly efficient furnace bag dust collector, comprising an upper box body 1, a middle box body 2 and a lower box body 3 which are arranged in sequence from top to bottom, an exhaust chamber 11 is arranged in the upper box body 1, a filter bag chamber 21 is arranged in the middle box body 2, a perforated plate 12 is arranged between the exhaust chamber 11 and the filter bag chamber 21, the perforated plate 12 is provided with ventilation holes arranged in a square array, a filter bag 4 which corresponds to the ventilation holes one by one and the bag opening is fixed to the ventilation holes is arranged in the filter bag chamber 21, an air inlet 22 for dust-containing gas to enter is arranged on the side of the filter bag chamber 21 near the bottom, an exhaust port 13 for purified gas to be discharged is arranged on the side of the exhaust chamber 11, and the lower box body 3 is hopper-shaped and is provided with There is a discharge chamber 31 for collecting fly ash, and a discharge valve 32 is arranged at the bottom of the discharge chamber 31. The discharge valve 32 is an existing component available on the market, which is not described in detail and does not affect the understanding of the structure. It also includes a lifting and cleaning device, which includes a lifting frame 5, an air box 6 and a lifting mechanism. The lifting frame 5 is located in the exhaust chamber 11. The lifting frame 5 is provided with a plurality of air supply pipes 51 arranged along the length direction of the upper box body 1 along the width direction of the upper box body 1. An injection pipe 52 corresponding to the filter bag 4 is arranged below the air supply pipe 51. The lifting mechanism is arranged on the upper box body 1 and drives the lifting frame 5 to move up and down. When the lifting frame 5 is at the highest position, the air supply pipe 51 is located in the exhaust chamber 11. When it is in the lowest position, the lower end of the air supply pipe 51 extends into the filter bag 4, and the air box 6 is fixed above the upper box body 1 and supplies air to each air supply pipe 51 respectively. The air box 6 is provided with an air inlet pipe 61 connected to the high-pressure air source. When dust cleaning is required, the lifting frame 5 is driven down by the lifting mechanism to make the lower end of the air supply pipe 51 extend into the filter bag 4, and the high-pressure gas enters the air supply pipe 51 through the air box 6 and is ejected from the jet pipe 52, which impacts the filter bag 4, thereby realizing the dust cleaning function. After the dust cleaning is completed, the lifting frame 5 is driven up by the lifting mechanism to restore the initial position. The above structure has the following advantages: ① When the jet pipe 52 is jetting, the lower end of the jet pipe 52 is located inside the filter bag 4, Compared with the traditional structure, the gas ejected will not leak into the exhaust chamber 11, ensuring the impact effect, and the jet position is lower, and the impact covers a larger range of the filter bag 4; ② The jet pipe 52 will return to the highest point after the jet is completed, which reduces the impact on the gas flow at the bag mouth of the filter bag 4 compared with the traditional structure, ensuring stable operation of the equipment; ③ The air box 6 is transferred to the upper part of the upper box body 1 with a larger area, so that the air box 6 can provide sufficient gas at any time; ④ Change the setting direction of the air supply pipe 51, from adjusting it along the length direction to adjusting it along the width direction, greatly shortening the length of the air supply pipe 51, so that each jet pipe 52 supplies more sufficient gas and the air pressure is more uniform, thereby ensuring the impact effect.

[0024] The lifting mechanism includes a cylinder 7 fixed on the top of the upper box body 1 and a guide seat 71 symmetrically arranged on both sides of the cylinder 7, a connecting rod 53 is arranged between adjacent air supply pipes 51, and the cylinder 7 is driven downward to be provided with a cylinder shaft 72 extending into the exhaust chamber 11 and fixed with the connecting rod 53. The guide seat 71 is vertically provided with a guide hole 711, and the guide hole 711 is slidably provided with a guide rod 73 extending into the exhaust chamber 11 and fixed with the connecting rod 53. The cylinder 7 is coordinated with multiple guide rods 73 to make the lifting of the lifting frame 5 more stable. The connecting rod 53 connected to the air supply pipe 51 is used as a connection point connected to the cylinder shaft 72 and the guide rod 73, so that the strength of the connection is more reliable. In addition, a movable seal is arranged between the guide hole 711 and the guide rod 73. The movable seal is an existing component available on the market, generally a sealing ring 712.

[0025] The air box 6 is arranged along the width direction of the upper box body 1, and an air supply valve 62 is arranged in front of the air box 6. The air supply valve 62 is located on the upper side wall of the exhaust chamber 11. An air supply connector 64 connected to the upper side of the air supply pipe 51 through a hose 63 is arranged. The air supply connector 64 can adopt various commercially available connectors for connecting pipes. The air supply position of each air supply pipe 51 is the upper side, so that the air pressure of each jet pipe 52 is more uniform. At the same time, the air supply connector 64 of the air supply valve 62 is located on the upper side wall of the exhaust chamber 11, which is convenient for plugging and unplugging the hose 63 connected to the air supply pipe 51, making debugging and disassembly more convenient. In addition, in order to clearly express the structure of the hose 63, the hose 63 is straight. In the embodiment, the hose 63 is relatively long and is actually in a bent state, which is not shown in the drawings.

[0026] A one-way valve 54 is provided at the lower end of the jet pipe 52. The one-way valve 54 is added to, on the one hand, prevent impurities from entering the jet pipe 52 and causing blockage, and on the other hand, maintain a certain air pressure in the air supply pipe 51, thereby quickly ejecting high-pressure gas.

[0027] The one-way valve 54 includes a valve body 541, which is vertically penetrated by a flow channel 542. A conical cavity 543 with a small end facing upward and a steel ball 544 sealingly matched with the side wall of the conical cavity 543 are arranged in the flow channel 542. An adjusting bolt 545 with threaded fit is arranged at the lower end of the flow channel 542. An air vent 5451 is vertically penetrated by the adjusting bolt 545. A cylindrical spring 546 is compressed and arranged between the upper end of the adjusting bolt 545 and the steel ball 544. The cylindrical spring 546 acts on the steel ball 544 to keep the steel ball 544 sealingly matched with the side wall of the conical cavity 543, so that the gas can be ejected only after the air pressure in the air supply pipe 51 exceeds the set value. At the same time, the cylindrical spring 546 is compressed by the easily disassembled adjusting bolt 545. On the one hand, it is easy to replace the cylindrical spring 546 after it is fatigued to ensure the sealing effect. On the other hand, the set value of the jet air pressure can be adjusted by replacing cylindrical springs 546 of different specifications to make the control more precise.

Claims

1. A highly efficient dust-cleaning furnace bag dust collector, comprising an upper box body, a middle box body and a lower box body arranged in sequence from top to bottom, an exhaust chamber is arranged in the upper box body, a filter bag chamber is arranged in the middle box body, a perforated plate is arranged between the exhaust chamber and the filter bag chamber, the perforated plate is provided with ventilation holes arranged in a square array, a filter bag corresponding to the ventilation holes one by one and the bag opening is fixed to the ventilation holes is arranged in the filter bag chamber, an air inlet for dust-containing gas to enter is arranged on the side of the filter bag chamber near the bottom, an exhaust port for purified gas to be discharged is arranged on the side of the exhaust chamber, the lower box body is hopper-shaped and is provided with a discharge chamber for collecting fly ash, and a discharge valve is arranged at the bottom of the discharge chamber, characterized in that: It also includes a lifting and cleaning device, which includes a lifting frame, an air box and a lifting mechanism. The lifting frame is located in the exhaust chamber. The lifting frame is provided with a plurality of air supply pipes arranged along the length direction of the upper box body along the width direction of the upper box body. Jet pipes corresponding to the filter bags are provided below the air supply pipes. The lifting mechanism is provided on the upper box body and drives the lifting frame to move up and down. When the lifting frame is in the highest position, the air supply pipe is located in the exhaust chamber. When it is in the lowest position, the lower end of the air supply pipe extends into the filter bag. The air box is fixed above the upper box body and supplies air to each air supply pipe. The air box is provided with an air intake pipe connected to a high-pressure air source.

2. The high-efficiency dust removal furnace bag filter according to claim 1 is characterized in that: The lifting mechanism includes a cylinder fixed above the upper box body and a guide seat symmetrically arranged on both sides of the cylinder. A connecting rod is arranged between adjacent air supply pipes. The cylinder is driven downward to have a cylinder shaft extending into the exhaust chamber and fixed to the connecting rod. The guide seat is vertically provided with a guide hole, and the guide hole is slidably provided with a guide rod extending into the exhaust chamber and fixed to the connecting rod.

3. The high-efficiency dust removal bag filter according to claim 1 is characterized in that: The air box is arranged along the width direction of the upper box body, and an air supply valve is arranged in front of the air box. The air supply valve is located on the upper side wall of the exhaust cavity and is provided with an air supply joint connected to the upper side of the air supply pipeline through a hose.

4. The high-efficiency dust removal bag filter according to claim 1 is characterized in that: A one-way valve is arranged at the lower end of the jet pipeline.

5. The high-efficiency furnace bag filter for dust removal according to claim 4 is characterized in that: The one-way valve includes a valve body, a flow channel is vertically penetrated through the valve body, a conical cavity with a small end facing upward and a steel ball sealed with the side wall of the conical cavity are arranged in the flow channel, an adjusting bolt with threaded cooperation is arranged at the lower end of the flow channel, an air vent is vertically penetrated through the adjusting bolt, and a cylindrical spring is compressed between the upper end of the adjusting bolt and the steel ball.

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