Boiler flue descaling device

Abstract

This invention discloses a boiler flue descaling device, comprising multiple descaling units fixed to the sidewall of the flue. Each descaling unit includes a support pipe, a cooling medium conveying pipe and an adjusting rod arranged sequentially from the outside to the inside within the support pipe, and a drive unit for driving the adjusting rod to move axially back and forth. A first gap is formed between the inner wall of the cooling medium conveying pipe and the outer wall of the adjusting rod. The inner wall of the output end of the cooling medium conveying pipe is provided with a conical inner wall, and a section of the adjusting rod corresponding to the conical inner wall is provided with a conical section adapted to the conical inner wall. A nozzle is provided at the output end of the cooling medium conveying pipe, and the nozzle extends into the flue. This invention uses an adjusting rod to regulate the injection volume of dry ice gas, and simultaneously uses a gas conveying pipe to inject gas and mix it with the dry ice gas before spraying it out. The vaporization and explosion of the dry ice particles create a vibration and crushing effect on the flue gas particles and the dirt on the inner wall of the flue, thereby achieving the purpose of flue descaling, reducing production costs, and facilitating operation.

Description

Technical Field

[0001] This invention relates to the field of boiler flue desulfurization technology, and in particular to a boiler flue descaling device. Background Technology

[0002] Due to the adhesion of flue gas particles to the inner wall of the boiler flue, coupled with the large temperature fluctuations and unstable temperature difference cycle within the flue, blocky sulfides easily form on the inner wall of the flue after a period of use, which increases the risk of blockage. Since there are many types of gases passing through the flue, the accumulated materials can easily react with components in other gases to form harmful gases that are discharged, greatly affecting the requirements for gas emission. Over time, this will have a significant impact on the local air quality. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a boiler flue descaling device that facilitates the removal of sulfur-containing deposits from the inner wall of the flue.

[0004] To solve the above-mentioned technical problems, the present invention adopts a technical solution as follows: a boiler flue descaling device is provided, including a flue and a plurality of descaling unit groups arranged at intervals along the height direction of the flue. Each descaling unit group includes a cooling medium storage unit and a plurality of descaling units. The input end of each descaling unit is connected to the output end of the cooling medium storage unit, and the output end is connected to the flue.

[0005] Each descaling unit includes a support pipe fixed to the side wall of the flue, a cooling medium delivery pipe and an adjusting rod arranged sequentially from the outside to the inside of the support pipe, and a drive unit for driving the adjusting rod to move axially back and forth. A first gap for the flow of cooling medium is formed between the inner wall of the cooling medium delivery pipe and the outer wall of the adjusting rod. The diameter of the inner wall of the output end of the cooling medium delivery pipe gradually increases in the direction away from the input end to form a conical inner wall. A section of the adjusting rod corresponding to the conical inner wall is defined as a conical segment adapted to the conical inner wall. The amount of gap between the first gap and the section of the conical inner wall can change with the reciprocating movement of the adjusting rod. A nozzle is provided at the output end of the cooling medium delivery pipe that can communicate with the first gap and extends into the flue.

[0006] Using the above structure, in order to fully react with the flue gas in the flue and thoroughly descale the inner wall of the flue, multiple descaling unit groups are set on the outside of the flue. To facilitate the installation of multiple descaling unit groups, each descaling unit group includes a cooling medium storage unit and multiple descaling units. The input end of each descaling unit is connected to the output end of the cooling medium storage unit, and the output end is connected to the flue, simplifying the connection structure. The cooling medium storage unit injects compressed air and dry ice gas into the descaling units. The dry ice gas and compressed air are mixed, and the mixed gas and liquid are sprayed into the flue under high pressure to fully mix with the flue gas particles to achieve the purpose of desulfurization. Since the flue gas flow rate in the flue may vary, an adjustable rod is provided to adjust the gas output of the cooling medium delivery pipe. Under the premise of satisfying the descaling reaction, the amount of dry ice gas discharged is reduced, which can not only achieve the purpose of flue descaling, but also avoid the increase of carbon dioxide content in the atmosphere at the production location, and save costs. The structure is simple and compact, and the operation is convenient.

[0007] To facilitate a full reaction, preferably, the cooling medium is defined as dry ice powder, and the cooling medium delivery pipe is defined as a dry ice powder delivery pipe;

[0008] Each of the descaling units further includes a gas delivery pipe disposed between the support pipe and the cooling medium delivery pipe, wherein the inner wall of the gas delivery pipe and the outer wall of the cooling medium delivery pipe form a space for gas flow; the output ends of the gas delivery pipe, the cooling medium delivery pipe, and the adjusting rod are covered by a cover, the cover having a mixing chamber that is in sealed communication with the first gap and the second gap, the nozzle being defined as an outlet nozzle disposed on the cover, the input end of the outlet nozzle communicating with the mixing chamber, and the output end extending into the flue;

[0009] The cooling medium storage unit includes a compressed gas transfer tank and a dry ice transfer tank. The output end of the compressed gas transfer tank is connected to the input end of the gas delivery pipe to deliver compressed gas to the second gap. The output end of the dry ice transfer tank is connected to the input end of the cooling medium delivery pipe to deliver dry ice powder to the first gap.

[0010] To facilitate the installation and fixing of the cooling medium delivery pipe, preferably, an air storage cover is provided at the output end of the cooling medium delivery pipe, and an air outlet is provided on the air storage cover. One end of the air outlet is connected to the first gap, and the other end is connected to the mixing chamber.

[0011] To facilitate rapid injection of ammonia-containing solution, preferably, each of the descaling units also includes a cooling gas pipe disposed between the support pipe and the gas delivery pipe, wherein a third gap for cooling gas to flow is formed between the inner wall of the cooling gas pipe and the outer wall of the gas delivery pipe.

[0012] The cooling medium storage unit also includes a pressure stabilizing tank. One side of the pressure stabilizing tank is provided with a first output end that is connected to the compressed gas transfer tank, and the other side is provided with a second output end that is connected to the cooling gas pipe, so as to deliver the cooling gas to the third gap.

[0013] To facilitate thorough mixing of gas and liquid, preferably, a first guide groove is provided on the inner wall of the gas conveying pipe, and a first guide block is provided on the outer wall of the cooling medium conveying pipe at a position corresponding to the first guide groove. The first guide block extends into the first guide groove to facilitate the installation and positioning of the cooling medium conveying pipe.

[0014] To facilitate the installation and positioning of the adjusting rod, preferably, a second guide groove is provided on the inner wall of the cooling medium conveying pipe, and a second guide block is provided on the outer wall of the adjusting rod at a position corresponding to the second guide groove. The second guide block extends into the second guide groove to facilitate the installation and positioning of the adjusting rod.

[0015] To ensure the airtightness of the gas delivery pipe, preferably, a sealing disc is provided at the gas inlet end of the gas delivery pipe, the liquid inlet end of the cooling medium delivery pipe is provided through the sealing disc, and a connecting disc is sleeved on the outside of the outlet end of the cooling medium delivery pipe.

[0016] To ensure the sealing between the cooling medium delivery pipe and the regulating pipe, preferably, a sealing ring is embedded in the inner wall of the inlet end of the cooling medium delivery pipe, and the regulating rod passes through the sealing ring and extends out of the cooling medium delivery pipe on the side corresponding to the inlet end of the cooling medium delivery pipe.

[0017] To prevent the leakage of ammonia-containing solution when the seal of the cooling medium delivery pipe fails, preferably, a fixing sleeve is fitted on the protruding end of the adjusting rod, and an expansion tube is fitted on the outside of the fixing sleeve. One end of the expansion tube is connected to the fixing sleeve, and the other end is connected to the connecting plate.

[0018] To simplify the structure and facilitate the movement of the adjusting rod, the drive unit preferably includes a bracket mounted on the gas delivery pipe, with a left support plate and a right support plate vertically mounted on the bracket. A lead screw is positioned between the two support plates, and a drive motor is mounted on the right support plate. One end of the lead screw is connected to the output end of the drive motor. A connecting block is screwed onto the lead screw, and a connecting plate is positioned at the non-screwed end of the connecting block. One end of the connecting plate is connected to the extended end of the adjusting rod.

[0019] Beneficial effects: This invention features an adjusting rod to regulate the injection volume of dry ice gas, and a gas delivery pipe to inject gas that mixes with the dry ice gas before being sprayed out. This causes the dry ice particles to vaporize and explode, creating a vibration and crushing effect on the flue gas particles and the dirt on the inner wall of the flue, thereby achieving the purpose of flue descaling. It also reduces production costs and is easy to operate. Attached Figure Description

[0020] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments of this application and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0021] Figure 1 This is a schematic diagram of the installation structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the installation structure for the support pipe.

[0023] Figure 3 for Figure 2 Enlarged view of point A in the image.

[0024] Figure 4 for Figure 2 BB section view in the middle.

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the support tube.

[0026] The meanings of the labels in the attached diagram are as follows:

[0027] Support pipe-1; Cooling gas pipe-10; Third gap-101; Gas delivery pipe-2; First guide groove-20; Second gap-202; Cover-21; Mixing chamber-211; Gas outlet nozzle-212; Sealing plate-23; Connecting plate-24;

[0028] Cooling medium delivery pipe-3; First guide block-30; Conical inner wall-301; First gap-302; Adjusting rod-31; Conical section-311; Air accumulator-32; Air outlet-321; Sealing ring-33; Second guide groove-34; Second guide block-35; Fixing sleeve-36; Corrugated expansion pipe-37;

[0029] Bracket-4; Lead screw-40; Left support plate-41; Right support plate-42; Drive motor-43; Connecting block-5; Connecting plate-51; Flue-6; Compressed gas turnover tank-71; Dry ice turnover tank-72; Pressure stabilizing tank-73; First output end-731; Second output end-732. Detailed Implementation

[0030] Depend on Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, the present invention includes a flue 6 and a plurality of descaling unit groups arranged at intervals along the height direction of the flue 6. Each descaling unit group includes a cooling medium storage unit and a plurality of descaling units. The input end of each descaling unit is connected to the output end of the cooling medium storage unit, and the output end is connected to the flue 6.

[0031] Each of the descaling units includes a support pipe 1 fixed to the side wall of the flue 6, a cooling medium conveying pipe 3 and an adjusting rod 31 arranged sequentially from the outside to the inside of the support pipe 1, and a drive unit for driving the adjusting rod 31 to move axially back and forth; a first gap 302 for the flow of cooling medium is formed between the inner wall of the cooling medium conveying pipe 3 and the outer wall of the adjusting rod 31; the inner diameter of the output end of the cooling medium conveying pipe 3 gradually increases in the direction away from the input end to form a conical inner wall 301; a section of the adjusting rod 31 corresponding to the conical inner wall 301 is defined as a conical segment 311 adapted to the conical inner wall 301; the gap amount of the first gap 302 corresponding to the conical segment 311 and the section of the conical inner wall 301 can change with the reciprocating movement of the adjusting rod 31; a nozzle is provided at the output end of the cooling medium conveying pipe 3 that can communicate with the first gap 302, and the nozzle extends into the flue 6.

[0032] Specifically, the cooling medium is defined as dry ice powder, and the cooling medium conveying pipe 3 is defined as a dry ice powder conveying pipe; each of the descaling units also includes a gas conveying pipe 2 disposed between the support pipe 1 and the cooling medium conveying pipe 3, and a gas flow is formed between the inner wall of the gas conveying pipe 2 and the outer wall of the cooling medium conveying pipe 3; a cover 21 is provided over the output ends of the gas conveying pipe 2, the cooling medium conveying pipe 3, and the adjusting rod 31, and the cover 21 has a mixing chamber 211 that is in sealed communication with the first gap 302 and the second gap 202; the nozzle is defined as an exhaust nozzle 212 disposed on the cover 21, the input end of the exhaust nozzle 212 is in communication with the mixing chamber 211, and the output end extends into the flue 6.

[0033] The cooling medium storage unit includes a compressed gas storage tank 71 and a dry ice storage tank 72. The output end of the compressed gas storage tank 71 is connected to the input end of the gas delivery pipe 2 to deliver compressed gas to the second gap 202. The output end of the dry ice storage tank 72 is connected to the input end of the cooling medium delivery pipe 3 to deliver dry ice powder to the first gap 302. A gas storage cover 32 is provided at the output end of the cooling medium delivery pipe 3. A gas outlet 321 is provided on the gas storage cover 32. One end of the gas outlet 321 is connected to the first gap 302, and the other end is connected to the mixing chamber 211.

[0034] Each of the descaling units also includes a cooling gas pipe 10 disposed between the support pipe 1 and the gas delivery pipe 2, and a third gap 101 for cooling gas to flow is formed between the inner wall of the cooling gas pipe 10 and the outer wall of the gas delivery pipe 2; the cooling medium storage unit also includes a pressure stabilizing tank 73, one side of the pressure stabilizing tank 73 is provided with a first output end 731 communicating with the compressed gas transfer tank 71, and the other side is provided with a second output end 732 communicating with the cooling gas pipe 10, so as to deliver cooling gas to the third gap 101.

[0035] A first guide groove 20 is provided on the inner wall of the gas conveying pipe 2, and a first guide block 30 is provided on the outer wall of the cooling medium conveying pipe 3 at a position corresponding to the first guide groove 20. The first guide block 30 extends into the first guide groove 20 to facilitate the installation and positioning of the cooling medium conveying pipe 3. A second guide groove 34 is provided on the inner wall of the cooling medium conveying pipe 3, and a second guide block 35 is provided on the outer wall of the adjusting rod 31 at a position corresponding to the second guide groove 34. The second guide block 35 extends into the second guide groove 34 to facilitate the installation and positioning of the adjusting rod 31.

[0036] A sealing disc 23 is provided at the gas inlet end of the gas delivery pipe 2, and the liquid inlet end of the cooling medium delivery pipe 3 is provided through the sealing disc 23. A connecting disc 24 is sleeved on the outside of the outlet end of the cooling medium delivery pipe 3.

[0037] A sealing ring 33 is embedded in the inner wall of the inlet end of the cooling medium conveying pipe 3. The adjusting rod 31 passes through the sealing ring 33 and extends out of the cooling medium conveying pipe 3 on one side corresponding to the inlet end of the cooling medium conveying pipe 3. A fixing sleeve 36 is fitted on the extended end of the adjusting rod 31. An expansion tube 37 is fitted on the outside of the fixing sleeve 36. One end of the expansion tube 37 is connected to the fixing sleeve 36, and the other end is connected to the connecting plate 24.

[0038] The drive unit includes a bracket 4 mounted on the gas delivery pipe 2. A left support plate 41 and a right support plate 42 are vertically mounted on the bracket 4. A lead screw 40 is located between the two support plates. A drive motor 43 is mounted on the right support plate 42. One end of the lead screw 40 is connected to the output end of the drive motor 43. A connecting block 5 is screwed onto the lead screw 40. A connecting plate 51 is located at the non-screwed end of the connecting block 5. One end of the connecting plate 51 is connected to the extended end of the adjusting rod 31.

[0039] The working principle of this invention is as follows:

[0040] like Figures 1 to 5As shown, the drive motor 43 is a reciprocating motor. During normal use, the solenoid valve (not shown) on the first output terminal 731 is opened, and gas is supplied from the pressure stabilizing tank 73 to the compressed gas transfer tank 71. Then, compressed gas is injected into the air inlet pipe 2 from the compressed gas transfer tank 71. The compressed gas is injected into the gas mixing chamber 211 through the first gap 302 between the inner wall of the gas delivery pipe 2 and the outer wall of the cooling medium delivery pipe 3. At the same time, dry ice gas is injected into the cooling medium delivery pipe 3 from the dry ice transfer tank 72. The dry ice gas flows into the gas storage hood 32 through the second gap 202 between the inner wall of the cooling medium delivery pipe 3 and the outer wall of the adjusting rod 31, and exits through the conical air outlet 32, which is smaller on the outside and larger on the inside. 1. The compressed air and dry ice gas are sprayed into the mixing chamber 211. In this way, the compressed air and dry ice gas are mixed in the mixing chamber 211, and finally, under the pressure of the compressed air, they are sprayed into the flue 6 through the outlet nozzle 212. Since the temperature of the dry ice gas is -78.5℃, after the dry ice gas particles come into contact with the surface of the flue gas molecules in the flue 6, the attached dirt is frozen to embrittle and cracked due to the rapid heat transfer of the dry ice molecules until it explodes. The dry ice particles penetrate into the dirt and the inner wall of the flue 6 through the impact of the explosion. Under the high temperature in the flue 6, they quickly vaporize, and the volume increases by 800 times in an instant, forcing the dirt to detach from the inner wall of the flue 6, thus achieving the purpose of cleaning.

[0041] When the exhaust volume in flue 6 decreases, the dry ice gas discharge volume needs to be reduced simultaneously. At this time, the drive motor 43 is started, driving the lead screw 40 to rotate. The connecting block 5, which is screwed to the lead screw 40, moves horizontally to the left as the thread rotates. The connecting plate 51, which is connected to the connecting block 5, also moves to the left simultaneously. The adjusting rod 31, which is connected to the connecting plate 51, also moves to the left, meaning the conical section 311 also moves to the left. Since the conical section 311 has a conical structure that is larger on the outside and smaller on the inside, when it moves to the left, the discharge port gap formed between the second gap 202 and the conical surface of the conical section 311 gradually decreases. That is, without adjusting the pressure, the dry ice gas injection volume per unit time decreases, thus achieving the purpose of reducing the dry ice gas discharge volume. When the conical surface of the conical section 311 completely abuts against the conical inner wall 301, the second gap 202 is sealed by the conical surface of the conical section 311, meaning the outlet position of the cooling medium conveying pipe 3 is completely sealed (e.g., Figure 3 (The position of the left side of the cone section 311 shown by the dotted line) will no longer inject dry ice gas; when needed, follow the aforementioned steps to start the drive motor 43 in reverse so that the connecting block 5 drives the adjusting rod 31 to move to the right, and adjust the size of the gas outlet gap according to the specific requirements of use.

[0042] During use, when the gas output from flue 6 is stable, it is not necessary to block the dry ice gas discharge. The drive motor 43 can then be turned on to achieve reciprocating rotation, that is, to make the adjusting rod 31 reciprocate within the cooling medium delivery pipe 3. When the adjusting rod moves to the position of the gas accumulator 32, the conical structure on the adjusting rod 31 fits against the conical structure of the inner wall of the gas accumulator 32 (e.g., Figure 3 The right side of the cone-shaped segment 311 (as shown by the dotted line) is precisely where the dry ice particles are compressed and broken up to achieve a better vaporization and explosion effect.

[0043] After use, open the solenoid valve (not shown) on the second output terminal 732 to inject cooling air from the pressure stabilizing tank 73 into the cooling air pipe 10. The cooling air enters the flue 6 through the third gap 101 to reduce the temperature and quickly reduce dust, so as to prevent the accumulation on the exhaust nozzle 212 from causing blockage.

[0044] After a certain period of use, the exhaust nozzle 212 may be corroded and damaged due to the influence of gas composition, which will increase the exhaust volume. Although it does not affect the effect of jet descaling, it will increase the production cost. In order to facilitate timely replacement, the exhaust nozzle 212 is screwed onto the cover 21.

[0045] It should be noted that although a sealing ring 33 is provided in front of the cooling medium conveying pipe 3, the sealing ring will eventually fail due to the high-temperature environment. Therefore, four sealing rings 33 are embedded in this embodiment to extend the service life of the seal. At the same time, a corrugated expansion tube 37 is also sleeved on the outside of the adjusting rod 31 to prevent the leakage of dry ice gas after all the sealing rings 33 fail. Since the main component of dry ice gas is carbon dioxide, in order to control atmospheric emissions and reduce the greenhouse effect, the overflowing dry ice gas will all flow into the corrugated expansion tube 37 and accumulate. This can maintain the air quality in the production area and ensure the safety of the processing area. At the same time, when the pressure in the cooling medium conveying pipe 3 decreases, the dry ice gas accumulated in the corrugated expansion tube 37 will be discharged into the cooling medium conveying pipe 3 from the gap of the sealing rings 33 for reuse. Later, if it is confirmed that there is a lot of leakage, the dry ice gas accumulated inside will be extracted first, then the corrugated expansion tube 37 will be removed, and finally the sealing rings 33 and the corrugated expansion tube 37 will be replaced.

[0046] In addition, since both the gas delivery pipe 2 and the cooling medium delivery pipe 3 are located inside the support pipe 1, i.e., the support pipe 1 is a unit of the descaling device, the number of support pipes 1 should be adapted to the properties of the gas being processed. The number of support pipes shown in this embodiment is not unique.

Claims

1. A boiler flue descaling device, characterized in that: It includes a flue (6) and multiple descaling unit groups spaced apart along the height direction of the flue (6). Each descaling unit group includes a cooling medium storage unit and multiple descaling units. The input end of each descaling unit is connected to the output end of the cooling medium storage unit, and the output end is connected to the flue (6). Each of the descaling units includes a support pipe (1) fixed to the side wall of the flue (6), a cooling medium conveying pipe (3) and an adjusting rod (31) arranged sequentially from the outside to the inside of the support pipe (1), and a drive unit for driving the adjusting rod (31) to move axially back and forth; a first gap (302) for the flow of cooling medium is formed between the inner wall of the cooling medium conveying pipe (3) and the outer wall of the adjusting rod (31); the inner diameter of the output end of the cooling medium conveying pipe (3) gradually increases in the direction away from the input end to form a conical inner wall (301); a section of the adjusting rod (31) corresponding to the conical inner wall (301) is defined. For the conical segment (311) adapted to the conical inner wall (301), the gap amount of the first gap (302) corresponding to a section of the conical segment (311) and the conical inner wall (301) can change with the reciprocating movement of the adjusting rod (31); an air storage cover (32) is provided at the output end of the cooling medium conveying pipe (3), the inner wall of the air storage cover (32) is a conical structure, the conical structure fits the conical surface structure of the adjusting rod (31), an air outlet (321) is provided on the air storage cover (32), one end of the air outlet (321) is connected to the first gap (302), and the other end is connected to the mixing chamber (211); The cooling medium is defined as dry ice powder, and the cooling medium conveying pipe (3) is defined as a dry ice powder conveying pipe. Each descaling unit also includes a gas conveying pipe (2) disposed between the support pipe (1) and the cooling medium conveying pipe (3). A gas flow is formed between the inner wall of the gas conveying pipe (2) and the outer wall of the cooling medium conveying pipe (3). The output ends of the gas conveying pipe (2), the cooling medium conveying pipe (3), and the adjusting rod (31) are covered with a cover (21). The cover (21) has a mixing chamber (211) that is in sealed communication with the first gap (302) and the second gap (202). The output end of the cooling medium conveying pipe (3) is provided with a nozzle that can communicate with the first gap (302). The nozzle is defined as an exhaust nozzle (212) provided on the cover (21). The input end of the exhaust nozzle (212) is connected to the mixing chamber (211), and the output end extends into the flue (6).

2. The boiler flue descaling device as described in claim 1, characterized in that: The cooling medium storage unit includes a compressed gas transfer tank (71) and a dry ice transfer tank (72). The output end of the compressed gas transfer tank (71) is connected to the input end of the gas delivery pipe (2) to deliver compressed gas to the second gap (202). The output end of the dry ice transfer tank (72) is connected to the input end of the cooling medium delivery pipe (3) to deliver dry ice powder to the first gap (302).

3. The boiler flue descaling device as described in claim 2, characterized in that: Each of the descaling units also includes a cooling gas pipe (10) disposed between the support pipe (1) and the gas delivery pipe (2), and a third gap (101) for cooling gas to flow is formed between the inner wall of the cooling gas pipe (10) and the outer wall of the gas delivery pipe (2). The cooling medium storage unit also includes a pressure stabilizing tank (73). The pressure stabilizing tank (73) has a first output end (731) on one side that is connected to the compressed gas turnover tank (71), and a second output end (732) on the other side that is connected to the cooling gas pipe (10) to deliver the cooling gas to the third gap (101).

4. The boiler flue descaling device as described in claim 2, characterized in that: A first guide groove (20) is provided on the inner side wall of the gas conveying pipe (2), and a first guide block (30) is provided on the outer wall of the cooling medium conveying pipe (3) at the position corresponding to the first guide groove (20). The first guide block (30) extends into the first guide groove (20) so as to facilitate the installation and positioning of the cooling medium conveying pipe (3).

5. The boiler flue descaling device as described in claim 2, characterized in that: A second guide groove (34) is provided on the inner side wall of the cooling medium conveying pipe (3), and a second guide block (35) is provided on the outer wall of the adjusting rod (31) at the position corresponding to the second guide groove (34). The second guide block (35) extends into the second guide groove (34) so ​​as to install and position the adjusting rod (31).

6. The boiler flue descaling device as described in claim 5, characterized in that: A sealing disc (23) is provided at the gas inlet end of the gas delivery pipe (2), and the liquid inlet end of the cooling medium delivery pipe (3) is provided through the sealing disc (23). A connecting disc (24) is sleeved on the outside of the outlet end of the cooling medium delivery pipe (3).

7. The boiler flue descaling device as described in claim 6, characterized in that: A sealing ring (33) is embedded on the inner wall of the inlet end of the cooling medium conveying pipe (3). The adjusting rod (31) passes through the sealing ring (33) and extends out of the cooling medium conveying pipe (3) on one side corresponding to the inlet end of the cooling medium conveying pipe (3).

8. The boiler flue descaling device as described in claim 6, characterized in that: A fixing sleeve (36) is fitted on the extended end of the adjusting rod (31), and an expansion tube (37) is fitted on the outside of the fixing sleeve (36). One end of the expansion tube (37) is connected to the fixing sleeve (36), and the other end is connected to the connecting plate (24).

9. The boiler flue descaling device as described in claim 2, characterized in that: The drive unit includes a bracket (4) mounted on the gas delivery pipe (2), a left support plate (41) and a right support plate (42) vertically mounted on the bracket (4), a lead screw (40) between the two support plates, a drive motor (43) mounted on the right support plate (42), one end of the lead screw (40) being connected to the output end of the drive motor (43); a connecting block (5) is screwed onto the lead screw (40), a connecting plate (51) is mounted on the non-screwed end of the connecting block (5), and one end of the connecting plate (51) being connected to the extended end of the adjusting rod (31).

Images