Circulating fluidized bed conveying device with cloth bag dust removal function

Abstract

The utility model discloses a circulating fluidized bed conveying device with a cloth bag dust removal function. According to the technical scheme, the circulating fluidized bed conveying device is characterized by comprising filtering equipment, and a conveying device; the filtering equipment comprises a filtering cylinder; the separation cylinder is arranged in the filter cylinder and is fixedly connected to the top of the filter cylinder; the spiral plate is fixedly connected to the inner wall of the filter cartridge, a cooling channel flowing in the spiral direction of the spiral plate is arranged in the spiral plate, and cold water enters the cooling channel from the bottom of the cooling channel and flows out of the cooling channel from the top of the cooling channel; the flat plate is fixedly connected into the separation cylinder, and the separation cylinder is divided into a collection cavity located at the top of the flat plate and a filtering cavity located at the bottom of the flat plate by the flat plate; and a filter cloth bag; the flue gas is cooled through the cold water in the spiral channel, so that the temperature of the flue gas is reduced, the damage to the filter cloth bag caused by high temperature of the flue gas is reduced, and the service life of the filter cloth bag is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of fluidized bed fly ash filtering, and more particularly to a circulating fluidized bed conveying device with bag dust removal function. Background Art

[0002] When the circulating fluidized bed is working, it will filter out the fly ash in the generated flue gas, and then transport it back to the fluidized bed through a conveying device for full combustion.

[0003] In the existing technology, the filtering devices matched with the conveying devices are mostly set as bag dust collectors. However, since the temperatures of fly ash and air in the flue gas are relatively high, the high temperature directly acts on the bags of the bag dust collector, causing damage to the bags and reducing the service life of the bag dust collector. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a circulating fluidized bed conveying device with bag dust removal function, which first cools the flue gas through cold water in the spiral channel, so that the temperature of the flue gas is reduced, thereby reducing the damage to the filter bag caused by the high temperature of the flue gas and increasing the service life of the filter bag.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a conveying device for a circulating fluidized bed with a bag dust removal function, comprising a filtering device for filtering out fly ash from the flue gas generated by the fluidized bed;

[0006] and a conveying device connected to the filtering device, the conveying device being used to convey the fly ash filtered out by the filtering device back into the fluidized bed;

[0007] The filtering device includes a filter cartridge, which is configured as a cylinder;

[0008] A separation cylinder is disposed in the filter cylinder and fixedly connected to the top of the filter cylinder, and the separation cylinder and the filter cylinder are coaxially disposed;

[0009] A spiral plate is fixedly connected to the inner wall of the filter cartridge and spirally arranged around the axis of the filter cartridge. A cooling channel is provided in the spiral plate, and flows along the spiral direction of the spiral plate. Cold water enters the cooling channel from the bottom of the cooling channel and flows out of the cooling channel from the top of the cooling channel.

[0010] A flat plate is fixedly connected to the separating cylinder, and the flat plate divides the separating cylinder into a collecting chamber located at the top of the flat plate and a filtering chamber located at the bottom of the flat plate;

[0011] And a filter cloth bag, wherein a plurality of filter cloth bags are provided and fixedly connected to the bottom of the flat plate, a plurality of through holes are provided on the flat plate, each filter cloth bag corresponds to a through hole, and the through holes connect the filter cloth bag with the collecting chamber.

[0012] The utility model is further configured to include an air intake pipe, which is fixedly connected to the filter cartridge and transports smoke into the filter cartridge along the tangential direction of the filter cartridge. The smoke transported by the air intake pipe is located at the bottom of the topmost position of the spiral plate.

[0013] The utility model is further configured to include an air outlet pipe, which is fixedly connected to the top of the filter cartridge and communicates with the collecting chamber;

[0014] and a backflush pipe, which is fixedly connected to the top of the filter cartridge and communicated with the collecting chamber; and an air pump for blowing gas into the collecting chamber is connected to the backflush pipe.

[0015] The utility model is further configured as follows: a plurality of support nets are fixedly connected to the bottom of the flat plate, the support nets are configured as a tubular structure with an open top, each support net corresponds to a cloth bag, the cloth bag is sleeved outside the corresponding support net, and the inner cavity of the support net is connected to the through hole corresponding to the cloth bag sleeved on the outside.

[0016] The utility model is further configured as follows: a plurality of heat conducting sheets arranged along the spiral direction of the spiral plate are fixedly connected to the bottom of the spiral plate.

[0017] The utility model is further configured to include a water inlet pipe connected to the bottom of the spiral plate for supplying cold water into the cooling channel;

[0018] and a water outlet pipe connected to the top of the spiral plate for delivering water in the cooling channel.

[0019] The utility model is further configured as follows: a dust collecting hopper is fixedly connected to the bottom of the filter cartridge;

[0020] The bottom of the dust hopper is fixedly connected to a dust outlet pipe, which is connected to the top of the conveying equipment to deliver the fly ash collected in the dust hopper to the conveying equipment;

[0021] The dust outlet pipe is provided with a relevant blower.

[0022] The utility model is further configured as follows: the conveying device is configured as an auger, the air outlet pipe is connected to the top of the feed end of the auger, and the discharge end of the auger is connected to the fluidized bed.

[0023] To sum up, compared with the prior art, the utility model has the following beneficial effects: the utility model first cools the flue gas through the cold water in the spiral channel, so that the temperature of the flue gas is reduced, thereby reducing the damage to the filter bag caused by the high temperature of the flue gas, and improving the service life of the filter bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic diagram of the overall structure of the embodiment;

[0025] Figure 2 is a cross-sectional view of a filtering device according to an embodiment;

[0026] Figure 3 for Figure 2 A magnified schematic diagram of part A;

[0027] Figure 4 for Figure 2 An enlarged schematic diagram of part B.

[0028] In the figure: 10, filtering equipment; 2, conveying equipment; 3, filter cartridge; 31, air inlet pipe; 32, air outlet pipe; 33, backflush pipe; 4, dust hopper; 5, dust outlet pipe; 51, air lock; 6, separator; 60, flat plate; 601, through hole; 61, collecting chamber; 62, filter chamber; 7, spiral plate; 71, cooling channel; 72, heat conducting plate; 73, water inlet pipe; 74, water outlet pipe; 8, support net; 81, filter bag. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the following is a clear and complete description of the technical solution of the present invention in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of this application. In addition, the directional terms mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only referenced to the directions of the drawings. Therefore, the directional terms used are used to illustrate rather than limit the invention.

[0030] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0031] Example: A conveying device for a circulating fluidized bed with bag dust removal function, see the attached Figure 1 -Attached Figure 4 , comprising a filtering device 10 and a conveying device 2, wherein the filtering device 10 is used to filter out fly ash from the flue gas generated by the fluidized bed; the conveying device 2 is connected to the filtering device 10, and the conveying device 2 is used to convey the fly ash filtered out by the filtering device 10 to the fluidized bed again;

[0032] The filtering device 10 includes a filter cartridge 3, a separator cartridge 6, a spiral plate 7, a flat plate 60 and a filter bag 81, wherein the filter cartridge 3 is configured as a cylinder; the separator cartridge 6 is disposed in the filter cartridge 3 and fixedly connected to the top of the filter cartridge 3, and the separator cartridge 6 is coaxially disposed with the filter cartridge 3; the spiral plate 7 is fixedly connected to the inner wall of the filter cartridge 3, and the spiral plate 7 is spirally disposed around the axis of the filter cartridge 3; a cooling channel 71 is disposed in the spiral plate 7, which flows along the spiral direction of the spiral plate 7, and cold water enters the cooling channel 71 from the bottom of the cooling channel 71 and flows out of the cooling channel 71 from the top of the cooling channel 71; a flat plate 60 is fixedly connected in the separator cartridge 6, and the flat plate 60 divides the separator cartridge 6 into a collecting chamber 61 located at the top of the flat plate 60 and a filter chamber 62 located at the bottom of the flat plate 60; a plurality of filter bags 81 are provided and fixedly connected to the bottom of the flat plate 60, and a plurality of through holes 601 are disposed on the flat plate 60, each filter bag 81 corresponds to a through hole 601, and the through holes 601 connect the filter bag 81 with the collecting chamber 61.

[0033] Specifically, this embodiment further includes an air intake pipe 31 , which is fixedly connected to the filter cartridge 3 and transports smoke into the filter cartridge 3 along the tangential direction of the filter cartridge 3 . The smoke transported by the air intake pipe 31 is located at the bottom of the topmost position of the spiral plate 7 .

[0034] The flue gas sent out from the fluidized bed is sent along the tangent of the filter tube 3 to between the filter tube 3 and the separation tube 6. Under the guidance of the spiral plate 7, the spiral roller spirally flows downward. During the flow process, the temperature of the flue gas is absorbed by the cold water in the cooling channel 71, reducing the temperature. The flue gas enters the separation tube 6 from the bottom of the separation tube 6, and then contacts the filter bag 81. At this time, the temperature of the flue gas is reduced and it is not easy to damage the filter bag 81. The flue gas is then filtered by the filter bag 81, and the air enters the filter bag 81 and enters the collecting chamber 61 through the through hole 601, and then is discharged from the filter tube 3. The fly ash goes down to the bottom of the filter tube 3, and then enters the conveying equipment 2 and is transported to the fluidized bed by the conveying equipment 2.

[0035] Specifically, this embodiment also includes an air outlet pipe 32 and a back-blowing pipe 33. The air outlet pipe 32 is fixedly connected to the top of the filter cartridge 3 and is connected to the collecting chamber 61; the back-blowing pipe 33 is fixedly connected to the top of the filter cartridge 3 and is connected to the collecting chamber 61, and the back-blowing pipe 33 is connected to an air pump for blowing gas into the collecting chamber 61.

[0036] The gas entering the collecting chamber 61 is discharged to the outside through the outlet pipe 32; valves are provided on both the outlet pipe 32 and the back-blowing pipe 33. During daily use, the valve of the back-blowing pipe 33 is closed, and the valve of the outlet pipe 32 is opened. The gas in the collecting chamber 61 is discharged to the outside through the outlet pipe 32. When it is necessary to clean the fly ash on the filter bag 81, the valve of the back-blowing pipe 33 is opened, and the valve of the outlet pipe 32 is closed. Gas is blown into the collecting chamber 61 through the air pump, and the gas enters the filter bag 81 and passes through the filter bag 81 outward to blow off the fly ash on the filter bag 81.

[0037] Specifically, a plurality of support nets 8 are fixedly connected to the bottom of the flat plate 60. The support nets 8 are configured as a tubular structure with an open top. Each support net 8 corresponds to a cloth bag, which is sleeved on the outside of the corresponding support net 8. The inner cavity of the support net 8 is connected to the through hole 601 corresponding to the cloth bag sleeved on the outside.

[0038] Specifically, a plurality of heat conducting sheets 72 arranged along the spiral direction of the spiral plate 7 are fixedly connected to the bottom of the spiral plate 7. Through the arrangement of the heat conducting sheets 72, the heat of the flue gas can be more fully transferred to the water in the spiral channel.

[0039] Specifically, this embodiment also includes a water inlet pipe 73 and a water outlet pipe 74. The water inlet pipe 73 is connected to the bottom of the spiral plate 7 to supply cold water into the cooling channel 71; the water outlet pipe 74 is connected to the top of the spiral plate 7 to discharge the water in the cooling channel 71.

[0040] Specifically, a dust collecting hopper 4 is fixedly connected to the bottom of the filter cartridge 3; a dust outlet pipe 5 is fixedly connected to the bottom of the dust collecting hopper 4, and the dust outlet pipe 5 is connected to the top of the conveying equipment 2 to deliver the fly ash collected in the dust collecting hopper 4 into the conveying equipment 2; a blower 51 is provided on the dust outlet pipe 5.

[0041] Specifically, the conveying device 2 is configured as an auger, the air outlet pipe is connected to the top of the feed end of the auger, and the discharge end of the auger is connected to the fluidized bed.

[0042] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A conveying device for a circulating fluidized bed with bag dust removal function, characterized in that: The invention comprises a filtering device (10), wherein the filtering device (10) is used to filter out fly ash from the flue gas generated by the fluidized bed; and a conveying device (2), wherein the conveying device (2) is connected to the filtering device (10), and the conveying device (2) is used to convey the fly ash filtered out by the filtering device (10) back into the fluidized bed; The filtering device (10) comprises a filter cartridge (3), wherein the filter cartridge (3) is configured as a cylinder; A separation cylinder (6), wherein the separation cylinder (6) is arranged in the filter cylinder (3) and fixedly connected to the top of the filter cylinder (3), and the separation cylinder (6) and the filter cylinder (3) are coaxially arranged; A spiral plate (7), wherein the spiral plate (7) is fixedly connected to the inner wall of the filter cylinder (3), the spiral plate (7) is spirally arranged around the axis of the filter cylinder (3), and a cooling channel (71) is provided in the spiral plate (7) and flows along the spiral direction of the spiral plate (7), and cold water enters the cooling channel (71) from the bottom of the cooling channel (71) and flows out of the cooling channel (71) from the top of the cooling channel (71); A flat plate (60) is fixedly connected to the separating cylinder (6), and the flat plate (60) separates the separating cylinder (6) into a collecting chamber (61) located at the top of the flat plate (60) and a filtering chamber (62) located at the bottom of the flat plate (60); and filter bags (81), wherein a plurality of filter bags (81) are provided and fixedly connected to the bottom of the flat plate (60), a plurality of through holes (601) are provided on the flat plate (60), each filter bag (81) corresponds to a through hole (601), and the through holes (601) connect the filter bags (81) with the collecting chamber (61).

2. The conveying device for a circulating fluidized bed with bag dust removal function according to claim 1, characterized in that: It also includes an air intake pipe (31), which is fixedly connected to the filter cartridge (3) and transports smoke into the filter cartridge (3) along the tangential direction of the filter cartridge (3), and the smoke transported by the air intake pipe (31) is located at the bottom of the topmost position of the spiral plate (7).

3. The conveying device for a circulating fluidized bed with bag dust removal function according to claim 2, characterized in that: It also includes an air outlet pipe (32), which is fixedly connected to the top of the filter cartridge (3) and communicates with the collecting chamber (61); and a backflush pipe (33), wherein the backflush pipe (33) is fixedly connected to the top of the filter cartridge (3) and communicates with the collecting chamber (61), and the backflush pipe (33) is connected to an air pump for blowing gas into the collecting chamber (61).

4. The conveying device for a circulating fluidized bed with bag dust removal function according to claim 3, characterized in that: A plurality of support nets (8) are fixedly connected to the bottom of the flat plate (60), and the support nets (8) are configured as a tubular structure with an open top. Each support net (8) corresponds to a cloth bag, and the cloth bag is sleeved outside the corresponding support net (8). The inner cavity of the support net (8) is connected to the through hole (601) corresponding to the cloth bag sleeved outside.

5. The conveying device for a circulating fluidized bed with bag dust removal function according to claim 4, characterized in that: A plurality of heat conducting plates (72) arranged along the spiral direction of the spiral plate (7) are fixedly connected to the bottom of the spiral plate (7).

6. The conveying device for a circulating fluidized bed with bag dust removal function according to claim 5, characterized in that: It also includes a water inlet pipe (73), which is connected to the bottom of the spiral plate (7) and is used to supply cold water into the cooling channel (71); and a water outlet pipe (74), wherein the water outlet pipe (74) is connected to the top of the spiral plate (7) and is used for sending water in the cooling channel (71) out.

7. The conveying device for a circulating fluidized bed with bag dust removal function according to claim 6, characterized in that: The bottom of the filter cartridge (3) is fixedly connected to a dust collecting hopper (4); A dust outlet pipe (5) is fixedly connected to the bottom of the dust collecting hopper (4), and the dust outlet pipe (5) is connected to the top of the conveying device (2) to convey the fly ash collected in the dust collecting hopper (4) into the conveying device (2); The dust outlet pipe (5) is provided with a related blower (51).

8. The conveying device for a circulating fluidized bed with bag dust removal function according to claim 7, characterized in that: The conveying device (2) is configured as an auger, the dust discharge pipe (5) is connected to the top of the auger feed end, and the auger discharge end is connected to the fluidized bed.

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