CN209706079U - Cleaning type steam-smoke-gas preheater - Google Patents

Abstract

The utility model relates to the field of garbage incineration flue gas treatment, in particular to a dust-removing steam-flue gas preheater, which includes a shell, the shell includes a flue gas chamber and a heat exchange chamber, and a heat exchange tube is arranged in the heat exchange chamber. The heat exchange tube is provided with a steam inlet and a steam outlet, the flue gas chamber is provided with a flue gas inlet, and the heat exchange chamber is provided with a flue gas outlet. The flue gas chamber is provided with a number of cylindrical dust removal filter cartridges, and the flue gas chamber is equipped with With flue pipe. The utility model has the advantage of improving the heat exchange efficiency of the heat exchange tube. By setting the dust removal filter cartridge in the flue gas chamber, the dust content of the flue gas entering the heat exchange chamber is reduced, so that the outer wall of the heat exchange tube is not easy to scale, thus improving the heat exchange efficiency of the heat exchange tube and prolonging the service life of the heat exchange tube Service life; by setting an exhaust port on the top of the partition between the flue gas chamber and the heat exchange chamber, part of the high-temperature flue gas flows back into the flue gas chamber from the exhaust port to preheat the low-temperature flue gas, which indirectly improves the exchange rate. heat transfer efficiency of the heater.

Description

Dust removal steam-flue gas preheater

technical field

The utility model relates to the field of garbage incineration flue gas treatment, in particular to a dust removal type steam-flue gas preheater.

Background technique

Steam-flue gas preheater (SGH) and flue gas-flue gas preheater (GGH) are the main auxiliary heating equipment for the SCR tail gas treatment equipment of waste incinerator. Denitrification is generally used in combination with SGH and GGH to save heat source steam. The flue gas released by the waste incinerator after the waste is burned is dedusted by the dust collector and desulfurized by the desulfurization tower, and then the temperature of the flue gas is raised to SCR through the flue gas-flue gas preheater (GGH) and steam-flue gas preheater (SGH) The temperature required for catalyst denitrification, and then the flue gas is sent to the SCR to complete the NOX treatment in the flue gas, so that the NOX content of the exhaust flue gas can reach the latest national emission standards.

The utility model patent with the authorized notification number CN208154515U discloses a convective heat exchange air preheater. The outer layer of the shell is provided with an outer insulation layer, the upper part of the shell is provided with an air inlet, and the right end is provided with an air outlet. A layer of refractory castable, heat-insulating castable is filled between the left end of the refractory castable and the shell, the burner is installed in the middle of the left end of the shell, the bottom of the shell is provided with a saddle, and the manhole is set in the middle of the outer shell. The utility model adopts direct-fired heating, controls the constant temperature of the outlet of the preheater through adjustable fuel consumption and the start and stop of the burner, and reduces the temperature of the shell through the way of air staging and mixing, increasing the preheating service life of the device. Because the flue gas produced by incineration of garbage contains a lot of dust, when the dust-containing flue gas passes through the heat exchange tube for a long time, it will cause scaling on the outer wall of the heat exchange tube, thus affecting the heat exchange efficiency of the heat exchange tube.

Utility model content

The purpose of the utility model is to provide a dust removal type steam-flue gas preheater, which has the advantage of improving the heat exchange efficiency of the heat exchange tube.

The purpose of the above-mentioned utility model of the utility model is achieved through the following technical solutions: a dust-removing steam-flue gas preheater, including a shell, the shell includes a flue gas chamber and a heat exchange chamber, and the heat exchange chamber is equipped with a heat exchanger The heat pipe, the heat exchange tube is provided with a steam inlet and a steam outlet, the flue gas chamber is provided with a flue gas inlet, and the heat exchange chamber is provided with a flue gas outlet, and the flue gas chamber is provided with a number of cylindrical dust filter cartridges, There is a flue gas pipe outside the flue gas chamber, one end of the dust removal filter cartridge is connected to the flue gas pipe, the other end of the dust removal filter cartridge is fixed with a bottom sealing plate, and a motor is fixed on the bottom sealing plate, the motor is driven to connect with the rotating shaft, and the rotating shaft runs through the bottom sealing The plate extends into the dust removal filter cartridge, and the rotating shaft is located on the central axis of the dust removal filter cartridge. The dust removal filter cartridge includes a folded plate filter screen, which is surrounded by a cylindrical shape, and a rod is fixed on the rotating shaft, and the rod rod is used to move the folding plate. plate strainer.

By adopting the above technical scheme, the flue gas generated by burning garbage enters several dust removal filter cartridges from the flue gas inlet, and the flue gas with less dust content filtered by the dust removal filter cartridges enters the flue gas chamber, and then flows into the heat exchange chamber to be mixed with steam Heat exchange, because the dust content in the flue gas is small, the outer wall of the heat exchange tube is not easy to scale, so the heat exchange efficiency of the heat exchange tube can be improved and the service life of the heat exchange tube can be extended. The motor starts intermittently to drive the rotating shaft to rotate, and the rod on the rotating shaft scrapes the inner wall of the folded plate filter element, shaking off the dust adhered to the folded plate filter element, so that the dust removal filter cartridge maintains a good dust removal and filtering effect.

Preferably, the end of the dust removal filter cartridge is fixedly provided with a mounting flange, and the mounting flange is connected to the end of the flue gas pipe through bolts.

By adopting the above technical scheme, the dust removal filter cartridge and the flue gas pipe are connected through the installation flange, so that the dust removal filter cartridge and the flue gas pipe can be easily disassembled, so that the dust removal filter cartridge can be disassembled to clean up the accumulated dust.

Preferably, manholes are provided on the outer wall of the smoke chamber.

By adopting the above technical scheme, manholes are provided on the flue gas chamber, which can facilitate maintenance personnel to enter the flue gas chamber to remove or install the dust removal filter cartridge or perform other maintenance.

Preferably, several V-shaped corners are fixed on the inner wall of the folded plate filter, and the ends of the rods are in contact with the V-shaped corners.

By adopting the above technical solution, the V-shaped wrapping angle plays a protective role for the folded plate filter, avoiding the long-term direct contact between the rod and the folded plate filter, which will cause the wear of the folded plate filter, and indirectly prolong the service life of the dust removal filter cartridge.

Preferably, the bottom sealing plate is provided with a dust-proof bearing, and the rotating shaft passes through the dust-proof bearing.

By adopting the above technical scheme, the dust-blocking structures on both sides of the dust-proof bearing can not only protect the balls from being worn due to debris entering the bearing, but also prevent the dust-laden smoke from the inner chamber of the dust-removing filter cartridge from passing through the gap between the rotating shaft and the bottom sealing plate. leakage.

Preferably, the heat exchange chamber includes an upper chamber body and a lower chamber body, the upper chamber is provided with an upper heat exchange tube group, and the lower chamber is provided with a lower heat exchange tube group; one end of the upper heat exchange tube group is connected to a second One pipe, the other end of the upper heat exchange tube group is connected with the second pipe, one end of the lower heat exchange tube group is connected with the third pipe, and the other end of the lower heat exchange tube group is connected with the fourth pipe; the first pipe Both the third pipeline and the third pipeline are provided with steam inlets, and the second pipeline and the fourth pipeline are both provided with steam outlets.

By adopting the above technical scheme, the steam exchanges heat with the flue gas through two sets of heat exchange tubes (upper heat exchange tube group and lower heat exchange tube group), which improves the heat exchange efficiency and the utilization rate of steam heat. Using a set of heat exchange tubes (the total length of the set of heat exchange tubes is equal to the total length of the two sets of heat exchange tubes) shortens the flow path of the steam in the heat exchange tubes and reduces the heat loss of the steam.

Preferably, a partition is provided between the heat exchange chamber and the flue gas chamber, and a through hole is provided on the partition.

By adopting the above technical solution, the flue gas in the flue gas chamber is concentrated and enters the heat exchange chamber from the through hole, and the flue gas in the flue gas chamber can further settle dust before passing through the through hole.

Preferably, an exhaust port is provided on the top of the separator.

By adopting the above technical scheme, most of the flue gas is discharged from the flue gas outlet after exchanging heat with steam in the heat exchange chamber, and a small part flows back into the flue gas chamber from the exhaust port to preheat the low-temperature flue gas, which indirectly improves the heat transfer efficiency of the heat exchanger. As the hot air rises, the flue gas with a higher temperature floats on the top of the heat exchange chamber, and this part of the flue gas flows back into the flue gas chamber through the exhaust port.

In summary, the beneficial technical effects of the utility model are:

1. By setting the dust removal filter cartridge in the flue gas chamber, the dust content of the flue gas entering the heat exchange chamber is reduced, so that the outer wall of the heat exchange tube is not easy to scale, thus improving the heat exchange efficiency of the heat exchange tube and prolonging the heat exchange time. the service life of the tube;

2. Use the motor to start intermittently to drive the rod to scrape the inner wall of the folded plate filter element, so that the dust adhered to the folded plate filter element is shaken off, so that the dust removal filter cartridge maintains a good dust removal and filtration effect;

3. By setting an exhaust port on the top of the partition between the flue gas chamber and the heat exchange chamber, part of the high-temperature flue gas flows back into the flue gas chamber from the exhaust port to preheat the low-temperature flue gas, which indirectly improves the heat transfer. The heat exchange efficiency of the device.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the dust removal type steam-flue gas preheater;

Fig. 2 is a schematic diagram of the structure on the left side of Fig. 1;

Fig. 3 is a schematic diagram of the internal structure of the flue gas chamber;

Fig. 4 is a schematic diagram of the internal structure of the dust removal filter cartridge;

Fig. 5 is a schematic structural view of Fig. 1 with the smoke chamber hidden.

In the figure, 1, flue gas chamber; 1a, manhole; 2, heat exchange chamber; 21, upper chamber body; 22, lower chamber body; 3, steam inlet; 4, steam outlet; 5, flue gas inlet; 6, Flue gas outlet; 7. Dust removal filter cartridge; 71. Folded plate filter; 711. V-shaped wrap angle; 72. Bottom sealing plate; 73. Mounting flange; 8. Flue gas pipe; 9. Motor; 10. Rotating shaft; 11. Rod; 12. Dust-proof bearing; 13. Upper heat exchange tube group; 14. Lower heat exchange tube group; 15. First pipe; 16. Second pipe; 17. Third pipe; 18. Fourth pipe ; 19, partition; 19a, through hole; 19b, exhaust port.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Embodiment: Figure 1 is a dust-removing steam-flue gas preheater disclosed by the utility model, which includes a shell, and the left half of the shell is a heat exchange chamber 2, and a dense heat exchange chamber is installed in the heat exchange chamber 2 The right half of the housing is the flue gas chamber 1. The heat exchange tube is provided with a steam inlet 3 and a steam outlet 4, and the steam enters the heat exchange tube from the steam inlet 3 and heats the heat exchange tube; the right side of the flue gas chamber 1 is provided with a flue gas inlet 5, and the There is a flue gas outlet 6 on the left side (see Figure 2). The flue gas generated by incineration of garbage enters the shell from the flue gas inlet 5, and is discharged from the flue gas outlet 6 after heat exchange and temperature rise when flowing through the heat exchange tube.

1 and 5, the heat exchange chamber 2 and the flue gas chamber 1 are separated by a vertical partition 19, and the partition 19 is provided with a through hole 19a for the flue gas to be discharged from the flue gas chamber 1 into the heat exchange chamber 2, The top of the partition 19 is also provided with an exhaust port 19b, and the flue gas after heat exchange with steam in the heat exchange chamber 2 rises to the top of the heat exchange chamber 2, and then flows back into the flue gas chamber 1 from the exhaust port 19b , can preheat the low-temperature flue gas in the flue gas chamber 1, thereby indirectly improving the heat exchange efficiency of the preheater.

As shown in Figure 1, the heat exchange chamber 2 is divided into an upper chamber body 21 and a lower chamber body 22, and an upper heat exchange tube group 13 is installed in the upper chamber body 21, and a lower heat exchange tube group 14 is installed in the lower chamber body 22. , the upper heat exchange tube group 13 and the lower heat exchange tube group 14 are composed of several heat exchange tubes. One end of the upper heat exchange tube group 13 is connected with the first pipeline 15, the other end of the upper heat exchange tube group 13 is connected with the second pipeline 16; one end of the lower heat exchange tube group 14 is connected with the third pipeline 17, and the lower The other end of the heat exchange tube group 14 is connected with a fourth tube 18 . Both the first pipe 15 and the third pipe 17 have a steam inlet 3 , and the second pipe 16 and the fourth pipe 18 have a steam outlet 4 . The steam exchanges heat with the flue gas through two sets of heat exchange tubes (upper heat exchange tube group 13 and lower heat exchange tube group 14), which improves the heat exchange efficiency and the utilization rate of steam heat. The heat pipe (the total length of this group of heat exchange tubes is equal to the total length of the two sets of heat exchange tubes) shortens the flow path of steam in the heat exchange tubes and reduces the heat loss of steam.

As shown in Figure 3, a plurality of cylindrical dust removal filter cartridges 7 are arranged in the flue gas chamber 1, and the dust removal filter cartridges 7 are composed of a folded plate filter screen 71, a mounting flange 73 and a bottom sealing plate 72, and the mounting flange 73 and The bottom sealing plate 72 is fixed on both ends of the folded plate filter screen 71, and the folded plate filter screen 71 is surrounded by a hollow cylinder. There is a flue gas pipe 8 outside the flue gas chamber 1, and branch pipes corresponding to the number of dust removal filter cartridges 7 are separated from the flue gas pipe 8. The branch pipes penetrate into the flue gas chamber 1 and are connected with the installation flange 73 by bolts. 73 connect the dust removal filter cartridge 7 and the flue gas pipe 8, so that the dust removal filter cartridge 7 and the flue gas cartridge are conveniently disassembled, so that the dust removal filter cartridge 7 is cleaned up. The outer wall of the flue gas chamber 1 is provided with a manhole 1a, which is convenient for maintenance personnel to enter into the flue gas chamber 1 to remove or install the dust removal filter cartridge 7.

3 and 4, a motor 9 is fixed on the bottom sealing plate 72, and a rotating shaft 10 is fixed on the rotating shaft of the motor 9. The rotating shaft 10 is located on the central axis of the folded plate filter screen 71, and the rotating shaft 10 extends from the folded plate. One end in the filter screen 71 is vertically fixed with rods 11, and the inwall of the folded plate filter screen 71 is fixed with some V-shaped wrap angles 711, and the end of the rods 11 contacts with the V-shaped wrap angles 711, and the rods 11 are used to dial Moving flap filter screen 71. The V-shaped wrap angle 711 protects the folded plate filter screen 71, avoids long-term direct contact between the rod rod 11 and the folded plate filter screen 71 and causes the folded plate filter screen 71 to be worn, and indirectly prolongs the service life of the dust removal filter cartridge 7. There is a round hole in the center of the bottom sealing plate 72, and a dust-proof bearing 12 is fixed in the round hole, and the rotating shaft 10 is passed through the dust-proof bearing 12. The wear of the balls can also prevent the dust-laden smoke in the inner cavity of the dust removal filter cartridge 7 from leaking from the matching gap between the rotating shaft 10 and the bottom sealing plate 72 .

The implementation principle of this embodiment is: the flue gas produced by incineration of garbage enters a plurality of dust removal filter cartridges 7 from the flue gas inlet 5, and the flue gas with low dust content filtered by the dust removal filter cartridges 7 enters the flue gas chamber 1, and then The flue gas flows into the heat exchange chamber 2 to exchange heat with steam. Because the dust content in the flue gas is small, the outer wall of the heat exchange tube is not easy to scale, so the heat exchange efficiency of the heat exchange tube can be improved and the service life of the heat exchange tube can be extended. The motor 9 starts intermittently to drive the rotating shaft 10 to rotate, and the rod 11 on the rotating shaft 10 scrapes the inner wall of the folded plate filter element to shake off the dust adhered to the folded plate filter element, so that the dust removal filter cartridge 7 maintains a good dust removal and filtering effect.

The embodiments of this specific embodiment are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model accordingly: all equivalent changes made according to the structure, shape and principle of the present utility model are all valid. Should be covered within the protection scope of the present utility model.

Claims (8)

1. a kind of cleaning type steam-smoke-gas preheater, including shell, shell includes smoke chamber (1) and Heat Room (2), Heat Room (2) heat exchanger tube is equipped in, heat exchanger tube is equipped with steam inlet (3) and steam (vapor) outlet (4), and smoke chamber (1) is equipped with gas inlet (5), Heat Room (2) is equipped with exhanst gas outlet (6), it is characterised in that: the dedusting of several cylinders is equipped in the smoke chamber (1) Filter cylinder (7), smoke chamber (1) are externally provided with fume pipe (8), and one end of dedusting filter cylinder (7) is connect with fume pipe (8), dedusting filter cylinder (7) The other end be fixed with bottom sealing plate (72), be fixed on bottom sealing plate (72) motor (9), on motor (9) be drivingly connected shaft (10), Shaft (10) stretches in dedusting filter cylinder (7) through bottom sealing plate (72), and shaft (10) is located on the central axes of dedusting filter cylinder (7), removes Dirt filter cylinder (7) includes folded plate strainer (71), and folded plate strainer (71) surrounds cylinder, rod (11), stick are fixed in shaft (10) Bar (11) is for stirring folded plate strainer (71).

2. cleaning type steam-smoke-gas preheater according to claim 1, it is characterised in that: the end of the dedusting filter cylinder (7) Portion is fixed with mounting flange (73), and mounting flange (73) and the end of fume pipe (8) are bolted.

3. cleaning type steam-smoke-gas preheater according to claim 1, it is characterised in that: the outer wall of the smoke chamber (1) It is equipped with manhole (1a).

4. cleaning type steam-smoke-gas preheater according to claim 1, it is characterised in that: the folded plate strainer (71) Several V-type cornerites (711) are fixed on inner wall, the end of rod (11) is contacted with V-type cornerite (711).

5. cleaning type steam-smoke-gas preheater according to claim 1, it is characterised in that: set on the bottom sealing plate (72) Have shield bearing (12), shaft (10) is arranged in shield bearing (12).

6. cleaning type steam-smoke-gas preheater according to claim 1, it is characterised in that: the Heat Room (2) includes upper Chamber body (21) and lower chamber body (22), upper chamber body (21) is interior to be equipped with upper heat exchange pipe group (13), and lower heat exchanger tube is equipped in lower chamber body (22) Group (14)；One end of upper heat exchange pipe group (13), which is connected, to be had first pipe (15), and the other end connection of upper heat exchange pipe group (13) has the Two pipelines (16), one end of lower heat exchange pipe group (14), which is connected, to be had third pipeline (17), and the other end of lower heat exchange pipe group (14) is connected There is the 4th pipeline (18)；It is equipped with steam inlet (3) on first pipe (15) and third pipeline (17), second pipe (16) and the Steam (vapor) outlet (4) are equipped on four pipelines (18).

7. cleaning type steam-smoke-gas preheater according to claim 1, it is characterised in that: the Heat Room (2) and flue gas Partition (19) are equipped between room (1), partition (19) is equipped with through-hole (19a).

8. cleaning type steam-smoke-gas preheater according to claim 7, it is characterised in that: set at the top of the partition (19) There is exhaust outlet (19b).