CN216693614U - Dust recovery unit that falls of rotation air preheater - Google Patents

Abstract

The utility model discloses a ash recovery device of a rotary air preheater, which comprises a heat exchange bin, a heat exchange rotor is rotatably arranged in the heat exchange bin, and baffle plates are arranged on the upper and lower sides of the heat exchange rotor, so that the The partition divides the interior of the heat exchange bin into a flue gas area and an air area, a smoke outlet is arranged on the lower side of the smoke area, a filter funnel is fixed in the smoke outlet, and the leak at the lower end of the filter funnel is fixed A conveying pipe transversely extending through the smoke outlet is provided. By arranging a filter funnel and a conveying pipe, the utility model can filter the dust and impurities contained in the flue gas flowing to the smoke outlet, and keep them on the filter funnel, and the flue gas is smoothly discharged from the smoke outlet, and then retained. Driven by gravity and airflow, the dust on the filter funnel enters the conveying pipe through the funnel of the filter funnel one after another. Then, the spiral blades in the conveying pipe are driven to rotate by the motor to discharge the dust separately, which facilitates the collection and treatment of dust.

Description

A kind of ash recovery device of rotary air preheater

technical field

The utility model relates to the technical field of air preheaters, in particular to a falling ash recovery device of a rotary air preheater.

Background technique

Air preheater is a device widely used in power station boilers to improve the heat exchange performance of the boiler and reduce energy consumption. It can be divided into two types: tubular type and rotary type. By alternately flowing flue gas and air through the heating surface of the rotor in the preheater to achieve heat transfer, the existing rotary air preheater can basically meet the needs of daily use, but there are still some shortcomings that need to be improved.

Patent document CN113108304A proposes a flue gas outlet device for an air preheater, including a flue, and the flue includes a flue gas input end, a flue gas output end, and a flue gas dust collection end connected to the main body of the air preheater; The connecting part of the flue gas input end, the flue gas output end and the dust collecting end; the connecting part is provided with a slope that collides with the flue gas to settle the dust, the flue gas dust collecting end is used to collect the settled dust, and the flue gas output end is used for outputting For the flue gas after settled dust, the flue gas and dust collecting end is arranged below the connecting part, and the flue gas and dust collecting end includes a settling ash hopper connected with the connecting part and a closed ash discharge device connected with the settling ash hopper. The invention effectively solves the problems of increased flue resistance, increased power consumption of the induced draft fan, increased exhaust gas temperature, reduced heat exchange effect of the air preheater, and increased heat loss due to the accumulation of dust in the flue, and the dust is recycled and utilized. That is, environmental protection and increased income.

When using the air preheater to recover the waste heat in the flue gas, the dust impurities contained in the flue gas will not only stay in the air preheater, affecting the heat exchange efficiency of the air preheater, but also easily pass through the air preheater directly to the subsequent pipelines or pipes. In order to avoid the above-mentioned problems, an ash recovery device for a rotary air preheater is urgently needed.

Utility model content

The purpose of the present utility model is to provide a ash recovery device of a rotary air preheater, so as to solve the problems raised in the above-mentioned background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a ash recovery device of a rotary air preheater, comprising a heat exchange bin, wherein a heat exchange rotor is rotatably arranged in the heat exchange bin, and the heat exchange rotor is up and down. The sides are provided with baffles, the baffles divide the interior of the heat exchange bin into a smoke area and an air area, a smoke outlet is arranged on the lower side of the smoke area, and a filter funnel is fixed in the smoke outlet, so The lower end of the filter funnel is fixedly provided with a conveying pipe that penetrates the smoke outlet horizontally, and a spiral blade is rotated in the conveying pipe. motor driven.

Preferably, the motor has two upper and lower output ends, a gear ring is fixedly arranged on the outside of the heat exchange rotor, and an output end of the motor is coaxially and fixedly connected with a first gear matching the gear ring.

Preferably, the other output end of the motor is coaxially and fixedly connected with a first bevel gear, the first bevel gear is meshed and connected with a second bevel gear, and the second bevel gear is coaxially and fixedly connected with a transmission shaft. The transmission shaft rotates through the conveying pipe and is coaxially and fixedly connected with the helical blade.

Preferably, an ash discharge port is provided at one end of the conveying pipe extending through the smoke outlet.

Preferably, a cleaning brush attached to the top of the heat exchange rotor is fixedly arranged in the flue gas zone.

Preferably, two sweeping plates that can sweep over the bottom surface of the flue gas region are rotatably arranged in the flue gas region, and a driving assembly for driving the two sweeping plates to rotate in opposite directions synchronously is arranged in the heat exchange chamber.

Preferably, the drive assembly includes a drive rod rotatably arranged in the heat exchange chamber, the drive rod is coaxially fixedly connected with a second gear, the second gear is meshed and connected with a third gear, and the third gear is connected to the same The shaft is fixedly connected with a driven rod which is rotatably arranged in the heat exchange chamber, and the two sweeping plates are respectively fixedly connected with the driving rod and the driven rod.

Preferably, a slope body is provided at the edge of the inner bottom surface of the heat exchange bin, and the shape of the free end of the sweeping plate matches the slope body.

Compared with the prior art, the beneficial effects of the present utility model are:

The ash recovery device of the rotary air preheater can filter the dust and impurities contained in the flue gas flowing to the smoke outlet by setting a filter funnel and a conveying pipe, and keep them on the filter funnel, and the flue gas can be smoothly discharged from the flue gas. Then, the dust trapped on the filter funnel, driven by gravity and airflow, enters the conveying pipe through the filter funnel one after another, and then the spiral blades in the conveying pipe driven by the motor to rotate can discharge the dust separately. It facilitates the collection and treatment of dust and prevents air pollution caused by the direct discharge of dust with the flue gas.

Description of drawings

Fig. 1 is the overall sectional structure schematic diagram of the present utility model;

Fig. 2 is the front view sectional structure schematic diagram of the utility model;

Fig. 3 is the side view sectional structure schematic diagram of the utility model;

Fig. 4 is the top view sectional structure schematic diagram of the utility model;

FIG. 5 is an enlarged schematic view of the structure at A in FIG. 3 of the present invention.

In the figure: 1, heat exchange bin; 2, heat exchange rotor; 3, partition plate; 4, flue gas area; 5, air area; 6, smoke outlet; 7, filter funnel; 8, conveying pipe; 9, spiral Blade; 10, motor; 11, gear ring; 12, first gear; 13, first bevel gear; 14, second bevel gear; 15, drive shaft; 16, ash outlet; 17, cleaning brush; 18, sweep plate; 19, driving rod; 20, second gear; 21, third gear; 22, driven rod; 23, slope; 24, smoke inlet; 25, air outlet; 26, air inlet; 27, handle .

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Referring to Figures 1-5, the rotary air preheater provided by the embodiments of the present utility model The ash recovery device includes a heat exchange bin 1, a heat exchange rotor 2 is rotatably arranged in the heat exchange bin 1, and the upper and lower sides of the heat exchange rotor 2 are provided with baffles 3, which divide the interior of the heat exchange bin 1 into flue gas Zone 4 and air zone 5, a smoke outlet 6 is arranged on the lower side of the flue gas zone 4, a filter funnel 7 is fixed in the smoke outlet 6, and a transporter that runs horizontally through the smoke outlet 6 is fixed at the leak at the lower end of the filter funnel 7. The pipe 8 and the conveying pipe 8 are rotatably provided with helical blades 9 , and the rotation of the heat exchange rotor 2 and the rotation of the helical blades 9 are both driven by the motor 10 fixedly installed outside the heat exchange bin 1 .

Specifically, the heat exchange bin 1 is used to provide a relatively airtight occasion for the heat exchange between flue gas and air; the heat exchange rotor 2 is formed by connecting and combining heat sinks that are easy to conduct heat, and there is a hollow structure on it, which can facilitate gas circulation , the heat exchange rotor 2 can quickly absorb the waste heat carried by the flue gas in the flue gas area 4 and store it, and at the same time, it can conduct the stored heat to the cold air in the air area 5 to preheat the cold air; The flue gas is in direct contact with the air to avoid turbulent flow; the upper side of the flue gas area 4 is provided with a smoke inlet 24, and the flue gas enters the heat exchange bin 1 through the smoke inlet 24, and then contacts the heat exchange rotor 2 to lose heat, Finally, it is discharged from the smoke outlet 6; the upper side of the air zone 5 is provided with an air outlet 25, while the lower side is provided with an air inlet 26. 2 contact and absorb heat, and finally discharged from the air outlet 25; the top of the filter funnel 7 is set to a conical filter screen structure, and the leak port is set to a tubular structure, and the filter screen structure of the filter funnel 7 can block the dust and impurities in the flue gas, And make the flue gas pass through smoothly; the conveying pipe 8 is communicated with the leak of the filter funnel 7; the outer diameter of the spiral blade 9 is equal to the inner diameter of the conveying pipe 8, so that the spiral blade 9 can restrict the circulation of the gas, so that the flue gas It is not easy to enter the conveying pipe 8, and then the screw blade 9 can drive the dust in the conveying pipe 8 to move through the screw feeding action that occurs when rotating. In actual use, the flue gas flows to the smoke outlet 6 after the heat consumption is completed in the heat exchange chamber 1, and then is filtered by the filter funnel 7, so that the dust impurities in the flue gas are separated from the flue gas gas, and the dust remains in the flue gas. The upper end of the filter funnel 7, and after the flue gas smoothly passes through the filter funnel 7, it is discharged through the smoke outlet 6; the dust retained on the filter funnel 7 is driven by gravity and airflow, and enters the transport through the filter funnel 7 leak. In the pipe 8, then, the motor 10 drives the helical blade 9 to rotate to produce a helical feeding effect, so that the dust in the conveying pipe 8 leaves the smoke outlet 6 and is separately discharged in a centralized manner, which facilitates the collection and processing of dust and prevents dust from accompanying the flue gas. Air pollution caused by direct emissions.

Compared with the prior art, the ash recovery device of the rotary air preheater proposed by the embodiment of the present invention can remove the ash contained in the flue gas flowing to the smoke outlet 6 by setting the filter funnel 7 and the conveying pipe 8 . The dust and impurities are filtered and retained on the filter funnel 7, and the flue gas is smoothly discharged from the smoke outlet 6. Then, the dust that stays on the filter funnel 7 is driven by gravity and airflow, and passes through the filter funnel 7. Enter into the conveying pipe 8, and then, the spiral blades 9 in the conveying pipe 8 driven by the motor 10 to rotate can discharge the dust separately, which facilitates the collection and processing of the dust and prevents the air pollution caused by the direct discharge of the dust with the flue gas.

As a preferred technical solution of this embodiment, the motor 10 has two output ends, upper and lower, a ring gear 11 is fixedly arranged on the outside of the heat exchange rotor 2 , and a first gear matching the ring gear 11 is coaxially and fixedly connected to an output end of the motor 10 . 12. Specifically, when the motor 10 starts, it drives the first gear 12 to rotate, and the first gear 12 drives the heat exchange rotor 2 to rotate through the meshing action with the gear ring 11, so that the heating surface of the heat exchange rotor 2 is in the flue gas area. 4 and the air zone 5 are switched to realize the heat exchange function.

As a preferred technical solution of this embodiment, the other output end of the motor 10 is coaxially and fixedly connected with a first bevel gear 13, the first bevel gear 13 is meshed with a second bevel gear 14, and the second bevel gear 14 is coaxially and fixedly connected with a The transmission shaft 15 rotates through the conveying pipe 8 and is coaxially and fixedly connected with the helical blade 9. Specifically, when the motor 10 is started, it drives the first bevel gear 13 to rotate, and the first bevel gear 13 passes through the second bevel gear 14. The meshing drives the drive shaft 15 to rotate, and the drive shaft 15 drives the helical blade 9 to rotate, so that the helical blade 9 can produce a helical feeding effect on the dust in the conveying pipe 8, so that the dust moves away from the smoke outlet 6 in the conveying pipe 8. and discharged separately.

As a further preferred technical solution of this embodiment, an ash discharge port 16 is provided at one end of the conveying pipe 8 extending through the smoke outlet 6. Specifically, the ash discharge port 16 is provided for the centralized discharge of dust, and is independent of the Outside the smoke outlet 6.

In another embodiment proposed by the present invention, a cleaning brush 17 attached to the top of the heat exchange rotor 2 is fixedly arranged in the flue gas area 4. Specifically, the flue gas enters the heat exchange bin 1 through the flue gas inlet 24 and communicates with the heat exchange chamber 1. When the heat exchange rotor 2 is in contact, dust will remain on the upper end surface of the heat exchange rotor 2, and the cleaning brush 17 is arranged so that when the heat exchange rotor 2 rotates, its upper end surface can be continuously wiped by the cleaning brush 17, so that the The retained dust is cleaned, reducing the influence of the dust covering the surface of the heat exchange rotor 2 on the heat exchange performance of the heat exchange rotor 2 .

In another embodiment proposed by the present invention, two sweeping plates 18 are rotatably arranged in the flue gas area 4 and can sweep over the inner bottom surface of the flue gas area 4, and the heat exchange bin 1 is provided with two sweeping plates 18 for driving the two sweeping plates 18 synchronously. The drive assembly that rotates in the opposite direction, specifically, the smoke outlet 6 usually does not cover the inner bottom surface of the entire flue gas area 4, so that stubborn dust and impurities may remain on the inner bottom surface of the flue gas area 4. The setting of the sweeping plate 18, It is to sweep the bottom surface of the flue gas area 4 through its rotation, and the sweeping direction is the direction close to the smoke outlet 6, so that the stubborn dust retained in the flue gas area 4 can be brought to the smoke outlet 6, and then It can facilitate the discharge and recycling of dust.

As a preferred technical solution of this embodiment, the drive assembly includes a drive rod 19 rotatably arranged in the heat exchange chamber 1 , a second gear 20 is fixedly connected to the drive rod 19 coaxially, and the second gear 20 is meshed with a third gear 21 . The third gear 21 is coaxially and fixedly connected with a driven rod 22 rotatably disposed in the heat exchange chamber 1 , and the two sweeping plates 18 are fixedly connected with the driving rod 19 and the driven rod 22 respectively. Specifically, one end of the driving rod 19 extends to the There is a handle 27 on the outside of the heat exchange chamber 1. The second gear 20 is meshed with the third gear 21, so that the driving rod 19 and the driven rod 22 rotate in opposite directions, and then drive the two sweeping plates 18 to rotate in the opposite direction synchronously. In this way, the sweeping plate 18 can rotate in the direction of synchronously approaching the smoke outlet 6 or rotate synchronously away from the direction of the smoke outlet 6 in the smoke area 4, and the two sweeping plates 18 can form a clamping effect to ensure the smoke area. 4. The stubborn dust retained on the inner bottom surface can be swept to the smoke outlet 6 by the sweeping plate 18. In actual use, the handle 27 rotates the driving rod 19, the driving rod 19 drives the second gear 20 to rotate, and the second gear 20 drives the driven rod 22 to rotate in the opposite direction to the driving rod 19 through the meshing relationship with the third gear 21. Therefore, the driving rod 19 and the driven rod 22 synchronously drive the two sweeping plates 18 to rotate in opposite directions in the smoke area 4. When the two sweeping plates 18 rotate synchronously in the direction close to the smoke outlet 6, the smoke can be removed The stubborn dust remaining on the ground in zone 4 is swept to the smoke outlet 6.

As a further preferred technical solution of this embodiment, a slope body 23 is provided at the edge of the inner bottom surface of the heat exchange bin 1, and the shape of the free end of the sweeping plate 18 matches the slope body 23. Specifically, specifically, the setting of the slope body 23 , so that most of the dust can be guided by the inclined surface and approach the smoke outlet 6, and then can be moved to the smoke outlet 6 by the sweeping action of the matching sweeping plate 18.

Working principle: When the dust and impurities in the flue gas need to be recovered and processed in a centralized manner, the flue gas firstly consumes heat in the heat exchange chamber 1 and flows to the smoke outlet 6, and then is filtered by the filter funnel 7, so that the The dust impurities in the flue gas are separated from the flue gas gas, and the dust remains on the upper end of the filter funnel 7, and the flue gas gas passes through the filter funnel 7 smoothly and is discharged through the smoke outlet 6; Driven by the air flow, they enter the conveying pipe 8 through the leak of the filter funnel 7. Then, the output end of the motor 10 drives the first bevel gear 13 to rotate, and the first bevel gear 13 drives the transmission through the meshing relationship with the second bevel gear 14. The shaft 15 rotates, and the transmission shaft 15 drives the helical blade 9 to rotate, so that the helical blade 9 can produce a helical feeding effect on the dust in the conveying pipe 8, so that the dust moves away from the smoke outlet 6 in the conveying pipe 8, and is finally discharged by the conveying pipe 8. The ash discharge port 16 is centrally discharged to the outside, which facilitates the separate collection and processing of dust, and prevents air pollution caused by the direct discharge of dust with the flue gas.

In addition, when the air preheater is used at one end for a period of time, some stubborn dust will remain in the flue gas area 4, and the driving rod 19 can be rotated through the handle 27, and the driving rod 19 drives the second gear 20 to rotate, and the second gear 20 passes through The meshing relationship with the third gear 21 drives the driven rod 22 and the driving rod 19 to rotate in opposite directions. Therefore, the driving rod 19 and the driven rod 22 synchronously drive the two sweeping plates 18 to rotate in the opposite directions in the smoke area 4. When the two When each sweeping plate 18 rotates synchronously in the direction close to the smoke outlet 6, the stubborn dust remaining on the surface of the smoke area 4 can be cleaned to the smoke outlet 6, and then go through the above-mentioned separation and transportation process of the smoke and dust The dust is collected and processed separately.

Claims (8)

1. The utility model provides a rotation air preheater's ash recovery unit that falls, includes heat transfer storehouse (1), its characterized in that: the internal rotation of heat transfer storehouse (1) is provided with heat transfer rotor (2), downside all is provided with baffle (3) on heat transfer rotor (2), baffle (3) divide heat transfer storehouse (1) inside into flue gas district (4) and air district (5), flue gas district (4) downside is provided with outlet flue (6), outlet flue (6) internal fixation is provided with filter funnel (7), filter funnel (7) lower extreme leak department is fixed and is provided with conveyer pipe (8) that transversely runs through outlet flue (6), conveyer pipe (8) internal rotation is provided with helical blade (9), the rotation of heat transfer rotor (2) and the rotation of helical blade (9) are all through motor (10) the drive of heat transfer storehouse (1) outer fixed mounting.

2. The ash falling recovery device of the rotary air preheater as recited in claim 1, wherein: the motor (10) is provided with an upper output end and a lower output end, a gear ring (11) is fixedly arranged on the outer side of the heat exchange rotor (2), and a first gear (12) matched with the gear ring (11) is coaxially and fixedly connected with one output end of the motor (10).

3. The fallen ash recovery device of the rotary air preheater as claimed in claim 2, wherein: the motor is characterized in that a first bevel gear (13) is coaxially and fixedly connected with the other output end of the motor (10), a second bevel gear (14) is meshed and connected with the first bevel gear (13), a transmission shaft (15) is coaxially and fixedly connected with the second bevel gear (14), and the transmission shaft (15) rotates to penetrate through the conveying pipe (8) and is coaxially and fixedly connected with the helical blade (9).

4. The fallen ash recovery device of the rotary air preheater as claimed in claim 1, wherein: the conveying pipe (8) penetrates through one end extending out of the smoke outlet (6) and is provided with an ash discharging opening (16).

5. The fallen ash recovery device of the rotary air preheater as claimed in claim 1, wherein: and a cleaning brush (17) attached to the top of the heat exchange rotor (2) is fixedly arranged in the smoke area (4).

6. The fallen ash recovery device of the rotary air preheater as claimed in claim 1, wherein: two sweeping plates (18) capable of sweeping the inner bottom surface of the flue gas area (4) are rotatably arranged in the flue gas area (4), and a driving assembly for driving the two sweeping plates (18) to synchronously rotate in opposite directions is arranged in the heat exchange bin (1).

7. The fallen ash recovery device of the rotary air preheater as claimed in claim 6, wherein: drive assembly includes actuating lever (19) that the internal rotation of heat transfer storehouse (1) set up, coaxial fixedly connected with second gear (20) on actuating lever (19), second gear (20) meshing is connected with third gear (21), the coaxial fixedly connected with of third gear (21) rotates driven lever (22) that set up in heat transfer storehouse (1), two sweep board (18) respectively with actuating lever (19), driven lever (22) fixed connection.

8. The fallen ash recovery device of the rotary air preheater as claimed in claim 7, wherein: a slope body (23) is arranged at the edge of the inner bottom surface of the heat exchange bin (1), and the appearance of the free end part of the sweeping plate (18) is matched with the slope body (23).

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