CN214406129U - Flue gas cooler and boiler - Google Patents

Abstract

The utility model relates to a flue gas cooling technology field provides a flue gas cooler and boiler, and this flue gas cooler includes: the body, this internal top-down is provided with multistage continuous H type fin cooling tube bank: and the anti-abrasion protective tile is sleeved on the pipeline of the first layer of the H-shaped fin cooling tube row of each stage, and the length direction of the anti-abrasion protective tile is consistent with the length direction of the pipeline. The utility model provides a flue gas cooler, the abrasionproof is established to the cover on the pipeline of the first layer of the H type fin cooling tube row of each grade and is protected the tile, blow to H type fin cooling tube row from last when the flue gas, the abrasionproof protects the tile and can protect the pipeline of the superiors not receive the direct invasion of flue gas, prevent that the flue gas from directly blowing the pipeline of the superiors, thereby avoid the wearing and tearing of flying dust and impurity in the flue gas to lead to the pipe wall attenuate to cause the emergence of revealing the problem, be favorable to prolonging this flue gas cooler's life.

Description

Flue gas cooler and boiler

Technical Field

The utility model relates to a flue gas cooling technology field, concretely relates to flue gas cooler and boiler.

Background

At present, the domestic biomass power generation industry is rapidly developed, the installed capacity is gradually increased, but the long-period stable operation of the biomass grate firing boiler becomes the key of the profit of the biomass power generation industry.

Biomass layer among the prior art fires the boiler, in order to improve combustion efficiency, carries out recycle to the heat in the flue gas, can set up the gas cooler at biomass layer fires the outlet flue of boiler usually, utilizes the heat in the flue gas to heat the cooling water in the gas cooler, later carries the hot water after will heating back to in the biomass layer fires the boiler. The existing flue gas cooler comprises five-stage H-shaped finned cooling tube rows connected from top to bottom, wherein the uppermost stage of the cooling tube row is connected with a flue gas outlet of a boiler, the lowermost stage of the cooling tube row is communicated with the outside, and flue gas is cooled from top to bottom and then discharged from the bottom of the flue gas cooler. However, because the fuel of the biomass grate firing boiler is greatly influenced by seasons and collection modes, the burnout rate of the biomass grate firing boiler is not high, the carbon content of fly ash is high, and the wall of each stage of cooling tube bank is easy to be thinned due to the abrasion of the fly ash and impurities, and finally leakage is caused.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the cooling tube bank of the flue gas cooler among the correlation technique and leading to the pipe wall attenuate because of the wearing and tearing of flying dust and impurity easily, finally cause the defect of revealing to a flue gas cooler and boiler are provided.

The utility model provides a flue gas cooler, include: the body, this internal top-down is provided with multistage continuous H type fin cooling tube bank: and the anti-abrasion protective tile is sleeved on the pipeline of the first layer of the H-shaped fin cooling tube row of each stage, and the length direction of the anti-abrasion protective tile is consistent with the length direction of the pipeline.

Furthermore, the anti-abrasion protective tile comprises an upper half tile and a lower half tile which are mutually buckled and connected.

Further, the flue gas cooler also comprises a light pipe cooling tube row which is positioned in the body and is connected with the H-shaped fin cooling tube row at the last stage.

Further, the tube panel gap of the light pipe cooling tube row is larger than that of the H-shaped fin cooling tube row of each stage.

Further, the flue gas cooler also comprises a soot blower which is positioned outside the body, an air outlet pipe of the soot blower extends into the body, an air outlet pipeline is positioned between two adjacent upper and lower H-shaped fin cooling pipe rows, and an air hole on the air outlet pipe faces downwards and is opposite to a pipe panel gap of the H-shaped fin cooling pipe row.

Further, the gas outlet pipe comprises a gun pipe and a rake pipe; one end of the gun tube is connected with a blowing port of the soot blower, the other end of the gun tube is sealed, and the extending direction of the gun tube is consistent with the length direction of the body; the harrow tube is perpendicular to the gun tube, the extension direction of the harrow tube is consistent along the width direction of the body, and the air holes are formed in the tube wall of the harrow tube.

Further, the flue gas cooler also comprises a slide rail and a slide block; the sliding rail is arranged on the inner wall of the body, and the extending direction of the sliding rail is consistent with the length direction of the body; the slide block is arranged at one end of the rake pipe, which is back to the gun barrel, and the slide block is slidably arranged on the slide rail and is suitable for guiding the rake pipe to move along the length direction of the body.

Furthermore, the flue gas cooler also comprises a guide pipe, wherein one end of the guide pipe extends into the body and is arranged between the two adjacent H-shaped fin cooling pipe rows, and the other end of the guide pipe is positioned outside the body; the barrel is movably inserted in the guide tube along the length direction of the body.

Furthermore, the flue gas cooler also comprises a header which is positioned in the body and arranged between two adjacent H-shaped fin cooling tube rows, a water outlet of the header is connected with a water inlet of the upstream H-shaped fin cooling tube row, and a water inlet of the header is connected with a water outlet of the downstream H-shaped fin cooling tube row.

The utility model also provides a boiler, including the aforesaid flue gas cooler.

The utility model discloses technical scheme has following advantage:

the utility model provides a flue gas cooler, the abrasionproof is established to the cover on the pipeline of the first layer of the H type fin cooling tube row of each grade and is protected the tile, blow to H type fin cooling tube row from last when the flue gas, the abrasionproof protects the tile and can protect the pipeline of the superiors not receive the direct invasion of flue gas, prevent that the flue gas from directly blowing the pipeline of the superiors, thereby avoid the wearing and tearing of flying dust and impurity in the flue gas to lead to the pipe wall attenuate to cause the emergence of revealing the problem, be favorable to prolonging this flue gas cooler's life.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a front view of a flue gas cooler provided in an embodiment of the present invention;

FIG. 2 is a side view of a flue gas cooler provided in an embodiment of the present invention;

fig. 3 is a schematic structural view of an anti-abrasion protection tile in a flue gas cooler according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a soot blower in a flue gas cooler according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a gun tube and a rake tube in a flue gas cooler according to an embodiment of the present invention;

FIG. 6 is a side view of a soot blower of a flue gas cooler installed in an H-shaped finned cooling tube bank in accordance with an embodiment of the present invention;

fig. 7 is a schematic structural view of a slide rail and a slide block in a flue gas cooler according to an embodiment of the present invention;

FIG. 8 is a front view of a flue gas cooler header provided in an embodiment of the present invention;

fig. 9 is a side view of a header of a flue gas cooler provided in an embodiment of the present invention.

Description of reference numerals:

1-body; 2-H type fin cooling tube bank; 3-light pipe cooling tube bank;

4-a soot blower; 5-upper half tile; 6-lower half tile;

7-a guide tube; 8-a barrel; 9-a harrow pipe;

10-a reinforcing rod; 11-a slide block; 12-a slide rail;

13-a header; 14-main tube; 15-branch pipe.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

FIG. 1 is a front view of a flue gas cooler provided in an embodiment of the present invention; FIG. 2 is a side view of a flue gas cooler provided in an embodiment of the present invention; fig. 3 is a schematic structural view of an anti-abrasion protection tile in a flue gas cooler according to an embodiment of the present invention; as shown in fig. 1, fig. 2 and fig. 3, the utility model provides a flue gas cooler, including: the body 1, top-down is provided with multistage continuous H type fin cooling tube bank 2 in the body 1: and the anti-abrasion protective tile is sleeved on the pipeline of the first layer of each stage of the H-shaped fin cooling tube row 2, and the length direction of the anti-abrasion protective tile is consistent with the length direction of the pipeline.

Specifically, the body 1 can be a tank body with a rectangular cross section, the periphery of the tank body is sealed, smoke enters from an opening above the body 1, passes through a tube panel gap of the H-shaped fin cooling tube bank 2 at each stage, and is finally discharged out of the body 1 from an opening at the bottom of the body 1. For example, five stages of H-shaped fin cooling tube rows 2 connected from top to bottom can be arranged in the body 1, the H-shaped fin cooling tube rows 2 adjacent to each other from top to bottom are communicated with each other, and cooling water flows from the last stage H-shaped fin cooling tube row 2 to the first stage H-shaped fin cooling tube row 2 from bottom to top, namely the flow direction of flue gas is opposite to the flow direction of cooling water. For example, the anti-abrasion protective tile may be a tubular structure, and is sleeved on the first layer of the pipe of each stage of the H-shaped fin cooling pipe row 2, that is, the pipe on the uppermost layer, and when the flue gas passes through each stage of the H-shaped fin cooling pipe row 2, the flue gas contacts the pipe on the uppermost layer first, and after the anti-abrasion protective tile is arranged, the pipe on the uppermost layer can be prevented from directly contacting the flue gas, so that the pipe is protected. For example, the wear protection tile may be made of 09CrCuSb, ND steel.

In one embodiment, the wear protection tile comprises an upper half-tile 5 and a lower half-tile 6 which are snap-fit connected to each other. For example, for the convenience of installation, the wear-resistant protective tile can be made into an upper half tile 5 and a lower half tile 6 which are buckled with each other up and down. The upper half tile 5 and the lower half tile 6 can be connected by riveting, welding and the like. Wherein, the size of abrasionproof protection tile can be selected as required.

In one embodiment, the flue gas cooler further comprises a light pipe cooling tube row 3 which is positioned in the body 1 and is connected with the last H-shaped fin cooling tube row 2. For example, a light pipe cooling tube bank 3 may be added downstream of the last H-shaped fin cooling tube bank 2, and the light pipe cooling tube bank 3 is formed by winding only one or more tubes, and may have a diameter of 32mm and a tube wall thickness of 4 mm. The length of the light pipe cooling tube row 3 is designed according to the requirement, so that the temperature of the smoke discharged by the body 1 is not more than 130 ℃. In addition, the smoke can be liquefied due to the reduction of the smoke exhaust temperature during the start-stop of the furnace, the chlorine and the sulfur in the smoke are easy to corrode the pipe, and the light pipe cooling pipe bank 3 can be made of ND steel, so that the acid resistance and the corrosion resistance are improved.

In one embodiment, the tube panel gap of the light pipe cooling tube row 3 is larger than the tube panel gap of each stage of the H-shaped fin cooling tube row 2. Secondly, because the nearer to the low reaches, the flue gas temperature is low, condenses water easily in fluorescent tube cooling tube bank 3 department of final stage, and the surface is stained with the ash easily behind the condensation, is stained with the ash too much, makes the tube panel clearance cigarette take place to block up easily, and the increase fluorescent tube cooling tube bank 3's of this final stage tube panel clearance is favorable to in time falling the ash and prevents to block up.

FIG. 4 is a schematic structural diagram of a soot blower in a flue gas cooler according to an embodiment of the present invention; as shown in fig. 4, in one embodiment, the flue gas cooler further includes a soot blower 4 located outside the body 1, an air outlet pipe of the soot blower 4 extends into the body 1, an air outlet pipe is located between two adjacent upper and lower H-shaped fin cooling pipe rows 2, and an air hole on the air outlet pipe faces downward and is opposite to a tube panel gap of the H-shaped fin cooling pipe row 2.

For example, to prevent soot and impurities contained in the flue gas from clogging the tube panel gap, a sootblower 4 may be provided to purge the tube panel gap. The air source of the soot blower 4 can be water vapor with certain pressure to prevent the alternation of cold and hot, which leads to the rupture of the cooling tube bank. Wherein, a plurality of soot blowers 4 can be arranged, and an air outlet pipe is arranged between every two adjacent H-shaped fin cooling pipe rows 2. Or a plurality of air outlet pipes are led out from one soot blower 4 to sweep the two adjacent H-shaped fin cooling pipe rows 2 up and down. The air holes on the air outlet pipe are all arranged at the bottom of the pipe wall, namely, when air is blown, the air is blown downwards to blow the top of the downstream H-shaped fin cooling pipe row 2. Wherein, the gas pocket can have a plurality ofly, and a plurality of gas pockets set up along the length direction of outlet duct, promptly, is unanimous with the length direction of body 1. Wherein, for the H-shaped fin cooling tube bank 2 located at the top, the outlet tube is located at a preset interval above the H-shaped fin cooling tube bank, for example, the preset interval may be 326 mm.

Fig. 5 is a schematic structural diagram of a gun tube and a rake tube in a flue gas cooler according to an embodiment of the present invention; as shown in fig. 5, in one embodiment, the gas outlet pipe comprises a gun barrel 8 and a rake pipe 9; one end of the gun tube 8 is connected with the air blowing port of the soot blower 4, the other end of the gun tube is sealed, and the extending direction of the gun tube 8 is consistent with the length direction of the body 1; the harrow tube 9 is vertical to the gun barrel 8, the extension direction of the harrow tube 9 is consistent along the width direction of the body 1, and the air holes are arranged on the tube wall of the harrow tube 9. For example, there may be one barrel 8 and four rake pipes 9, wherein each two rake pipes 9 are a group, one group is arranged symmetrically on both sides of the barrel 8, and is cross-shaped with the barrel 8, and the two groups of rake pipes 9 are arranged at certain intervals along the length direction of the barrel 8. Wherein the size of the harrow tube 9 can be set as required. When the device is used, the gun barrel 8 can be moved along the length direction of the body 1, so that the air holes in the rake pipes 9 can purge pipe panel gaps at different positions. For example, in order to increase the strength of the entire outlet duct, a reinforcing rod 10 may be provided between the gun barrel 8 and the rake pipes 9, and the reinforcing rod 10 may be disposed obliquely in a zigzag shape with respect to the two rake pipes 9 on the same side.

FIG. 6 is a side view of a soot blower of a flue gas cooler installed in an H-shaped finned cooling tube bank in accordance with an embodiment of the present invention; fig. 7 is a schematic structural view of a slide rail and a slide block in a flue gas cooler according to an embodiment of the present invention; as shown in fig. 6 and 7, in one embodiment, the flue gas cooler further includes a slide rail 12 and a slide block 11; the sliding rail 12 is arranged on the inner wall of the body 1, and the extending direction of the sliding rail 12 is consistent with the length direction of the body 1; a slide block 11 is arranged at one end of the harrow tube 9 opposite to the gun barrel 8, and the slide block 11 is slidably arranged on a slide rail 12 and is suitable for guiding the harrow tube 9 to move along the length direction of the body 1.

For example, an opening may be formed in a side wall of the body 1, and the barrel 8 may extend into the body 1 through the opening, wherein the barrel 8 is located on a width-wise centerline of the H-fin cooling tube bank 2. The length of the harrow tube 9 is equal to half of the width of the H-shaped fin cooling tube row 2, a slide block 11 is arranged at the tail end of the harrow tube 9 far away from the gun barrel 8, and a slide rail 12 is arranged at the corresponding position of the inner wall of the body 1, so that the harrow tube 9 can move along the slide rail 12. The slide rail 12 and the inner wall of the body 1 can be welded or bolted, and the slide block 11 and the harrow tube 9 can be welded. Wherein, the air hole is arranged at the bottom of the pipe wall of the harrow pipe 9, and the air is blown downwards. The number and the positions of the air holes can be designed according to needs. The end of the rake pipe 9 remote from the barrel 8 may be sealed.

In one embodiment, the flue gas cooler further comprises a guide pipe 7, one end of the guide pipe 7 extends into the body 1 and is arranged between the two adjacent H-shaped fin cooling pipe rows 2, and the other end of the guide pipe 7 is positioned outside the body 1; the barrel 8 is movably inserted in the guide tube 7 along the length direction of the body 1. For example, the guide pipe 7 may be welded to the body 1, and the soot blower 4 and the end of the guide pipe 7 away from the body 1 may be sealed. The pipe diameter of guide tube 7 is greater than the pipe diameter of barrel 8 for barrel 8 can move in guide tube 7, plays certain direction and supporting role to barrel 8.

FIG. 8 is a front view of a flue gas cooler header provided in an embodiment of the present invention; fig. 9 is a side view of the header in the flue gas cooler provided in an embodiment of the present invention, as shown in fig. 8 and fig. 9, in an embodiment, the flue gas cooler further includes a header 13 located in the body 1 and disposed between two adjacent H-shaped fin cooling tube rows 2, a water outlet of the header 13 is connected to a water inlet of the H-shaped fin cooling tube row 2 at the upstream, and a water inlet of the header 13 is connected to a water outlet of the H-shaped fin cooling tube row 2 at the downstream.

For example, in order to facilitate connection between the upstream and downstream two stages of the H-shaped fin cooling tube rows 2, a header tank 13 may be provided therebetween, wherein the header tank 13 is provided near the inner wall of the body 1 in the region between the inner wall of the body 1 and the H-shaped fin cooling tube row 2. For example, the header tank 13 may include a main pipe 14 and a plurality of branch pipes 15 separated from the main pipe 14, both ends of the main pipe 14 are sealed, and the number of the branch pipes 15 is equal to the number of the pipes of each row 2 of H-shaped fin cooling pipes. The branch pipes 15 for water outlet of the header 13 can be correspondingly welded with the pipelines for water inlet of the upstream H-shaped fin cooling pipe row 2 one by one; alternatively, the branch 15 for the outlet of the header 13 may be in communication with the inlet of the boiler; or the branch pipes 15 for water inlet of the header 13 can be correspondingly welded with the pipelines for water outlet of the downstream H-shaped fin cooling pipe row 2 one by one; alternatively, the branch pipes 15 for the water inlet of the header 13 may be welded to the respective pipes of the downstream light pipe cooling pipe row 3 for the water outlet in a one-to-one correspondence. In order to ensure the strength of the main pipe 14, the connection points of the branch pipes 15 and the main pipe 14 may be staggered.

The utility model also provides a boiler, including foretell flue gas cooler.

To sum up, the utility model provides a flue gas cooler has following advantage:

1, the installation is more flexible, and the installation method can adapt to complex and changeable installation environments;

2, the bearing capacity is stronger, and the strength is higher;

3, the heat dissipation performance is better, and the maintenance is more convenient.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (10)

1. A flue gas cooler, comprising:

the body, this internal top-down is provided with multistage continuous H type fin cooling tube bank:

and the anti-abrasion protective tile is sleeved on the pipeline of the first layer of the H-shaped fin cooling tube row of each stage, and the length direction of the anti-abrasion protective tile is consistent with the length direction of the pipeline.

2. The flue gas cooler of claim 1,

the anti-abrasion protective tile comprises an upper half tile and a lower half tile which are mutually buckled and connected.

3. The flue gas cooler of claim 1,

the cooling device also comprises a light pipe cooling tube row which is positioned in the body and is connected with the H-shaped fin cooling tube row at the last stage.

4. The flue gas cooler of claim 3,

the tube panel clearance of the light tube cooling tube row is larger than that of each stage of H-shaped fin cooling tube row.

5. The flue gas cooler of claim 1,

the air outlet pipe of the soot blower extends into the body, the air outlet pipeline is positioned between the two adjacent upper and lower H-shaped fin cooling tube rows, and the air hole on the air outlet pipe faces downwards and is opposite to the tube panel gap of the H-shaped fin cooling tube row.

6. The flue gas cooler of claim 5,

the gas outlet pipe comprises a gun barrel and a rake pipe;

one end of the gun tube is connected with a blowing port of the soot blower, the other end of the gun tube is sealed, and the extending direction of the gun tube is consistent with the length direction of the body;

the harrow tube is perpendicular to the gun tube, the extension direction of the harrow tube is consistent along the width direction of the body, and the air holes are formed in the tube wall of the harrow tube.

7. The flue gas cooler of claim 6,

the device also comprises a slide rail and a slide block;

the sliding rail is arranged on the inner wall of the body, and the extending direction of the sliding rail is consistent with the length direction of the body;

the slide block is arranged at one end of the rake pipe, which is back to the gun barrel, and the slide block is slidably arranged on the slide rail and is suitable for guiding the rake pipe to move along the length direction of the body.

8. The flue gas cooler of claim 6,

the cooling device also comprises a guide pipe, wherein one end of the guide pipe extends into the body and is arranged between two adjacent H-shaped fin cooling pipe rows, and the other end of the guide pipe is positioned outside the body;

the barrel is movably inserted in the guide tube along the length direction of the body.

9. The flue gas cooler of claim 1,

the water inlet of the header is connected with the water outlets of the H-shaped fin cooling tube rows at the downstream.

10. A boiler, characterized by comprising a flue gas cooler according to any of claims 1-9.

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