Boiler shock wave soot blower rupture pipe condensate self-removal device
By installing a sealing collector and a self-draining valve at the bottom of the flat section of the boiler shock wave sootblower, the problems of furnace tube rupture and sootblowing pipe corrosion caused by condensate accumulation were solved, achieving effective evaporation and discharge of condensate and ensuring the safe and stable operation of the boiler.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN ANCAI PHOTOVOLTAIC ADVANCED MATERIAL CO LTD
- Filing Date
- 2025-07-02
- Publication Date
- 2026-06-30
AI Technical Summary
The existing boiler shock wave sootblower's bursting pipes cause furnace tube rupture and sootblowing pipe corrosion after high-temperature flue gas condensate accumulates, posing safety hazards and increasing equipment maintenance costs.
A sealed collector and a self-draining valve are installed at the bottom of the flat section of the shock wave sootblower. The condensate is collected and evaporated or discharged through the drain hole to prevent the condensate from flowing into the furnace body. The sealed collector and heat transfer jacket are designed to be inclined upwards to facilitate the evaporation and discharge of the condensate.
It effectively prevents corrosion and cracking caused by condensate flowing into the furnace body, extends the service life of the equipment, reduces maintenance costs, and ensures the safe operation of the boiler.
Smart Images
Figure CN224434434U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of shock wave soot blower technology, and specifically relates to a device for automatically removing condensate from the bursting pipe of a boiler shock wave soot blower. Background Technology
[0002] The shockwave sootblower duct consists of two parts: a straight section and a horizontal section. The horizontal section extends 0.3 meters into the boiler body from the side, while the external bursting duct is 1.2 meters long. The flue gas temperature inside the boiler casing is approximately 250 degrees Celsius. The flue gas inside the boiler casing contains 20% water vapor and corrosive gases such as NH4, SO2, and HCl. Due to the significant temperature difference between the internal and external bursting ducts, condensation occurs on the pipe walls of the straight and horizontal sootblowing ducts outside the boiler body. This condensation flows into the boiler body through the height difference of the straight sootblowing duct. The condensation causes corrosion at the points where the horizontal section of the duct contacts the boiler wall, or drips onto the high-temperature furnace tubes inside the casing, leading to tube bursts. This results in frequent corrosion damage and leaks from bursting furnace tubes.
[0003] The soot on the furnace tubes is blown away using a shock wave sootblower. The DN150 flat section of the shock wave sootblower has a 1.2-meter section outside the furnace body. After the high temperature of the flue gas inside the section cools down, condensation easily forms on the pipe wall. Since the sootblower pipe is a closed structure, the collected condensation cannot be discharged and can only flow into the furnace body through the DN150 ruptured pipe. If the condensation drips onto the high temperature furnace tubes for a long time, it will cause the furnace tubes to burst and the sootblowing pipe to corrode, creating a major safety hazard. At the same time, it will also cause the boiler to shut down and the system to switch, resulting in the danger of excessive emissions of flue gas dust.
[0004] The shockwave sootblower consists of 60 DN150mm x 8 pipes, layered and inserted into φ180 holes in a 5mm thick steel plate of the furnace body. The bursting pipes are welded and fixed to the steel plate on the furnace wall. Their function is to deliver the generated shockwave gas through these bursting pipes into the furnace body, blowing and vibrating away the soot on the furnace tubes to ensure effective heat exchange area. The sootblowing pipes and the boiler body are a welded, sealed structure. Affected by external temperature and insulation, high-temperature flue gas inside the shockwave sootblower pipes outside the furnace body condenses on the pipe walls. This condensate collects at the bottom of the DN150x8 pipes and flows into the boiler body. When this condensate drips onto the high-temperature furnace tubes, it frequently causes sudden furnace tube ruptures and leaks, as well as corrosion and gas leaks at the bottom of the sootblowing pipes, leading to shutdowns. These failures necessitate system shutdowns for repairs, impacting normal environmental emissions and waste heat power generation. To ensure the safe operation of the waste heat boiler and prevent accidents such as furnace tube rupture and water leakage, as well as corrosion and gas leakage at the bottom of the soot blowing pipe, frequent system shutdowns are required for furnace tube welding and leak sealing, and soot blowing pipe replacement, which significantly increases equipment maintenance costs.
[0005] Therefore, improvements are needed to address the condensate corrosion problem in shock wave soot blowers, taking into account the above circumstances. Summary of the Invention
[0006] The purpose of this invention is to address the shortcomings of the existing technology by providing a self-removing device for condensate from the bursting pipe of a boiler shock wave sootblower, effectively solving the problems of boiler tube bursting and sootblowing pipe corrosion caused by accumulated condensate.
[0007] To solve the above technical problems, the technical solution adopted by this utility model is as follows:
[0008] The boiler shock wave soot blower rupture pipe condensate self-removal device includes a horizontal section pipe connected to the shock wave soot blower and a condensate collector sleeved on the horizontal section pipe. The connection part at the end of the horizontal section pipe enters the furnace body and communicates with the furnace body and is arranged at an angle a degree upward on the horizontal line. The side of the connection part near the condensate collector is lower than the inside of the furnace body.
[0009] The condensate collector is located outside the furnace wall and includes a sealed collector fitted on a horizontal pipe section and a self-draining valve installed at the bottom of the sealed collector. A drain hole is also opened at the bottom of the horizontal pipe section located inside the sealed collector.
[0010] A heat transfer jacket is also sealed and fixed between the sealed collector and the outer side of the furnace wall.
[0011] The connecting part is inclined upwards at an angle of 1 to 10 degrees to the horizontal line.
[0012] The connecting part is inclined upward at 3 degrees to the horizontal line.
[0013] The bottom of the sealed collector is covered with an anti-corrosion layer, and the self-draining valve is installed on the anti-corrosion layer.
[0014] The sealed collector and the heat transfer jacket are fully welded together.
[0015] The sealed collector also has an insulation layer on its annular outer wall.
[0016] The self-draining valve is threaded onto the anti-corrosion layer.
[0017] The beneficial effects of this utility model are:
[0018] (1) The condensate removal device for the ruptured pipe of the shock wave sootblower of the boiler is achieved by opening a drain hole at the bottom of the flat section of the shock wave sootblower pipe, welding a sealing collector around the flat section of the pipe near the furnace wall, and installing a self-draining valve at the bottom of the sealing collector. The device adds a condensate collection, evaporation and self-draining device to the flat section of the pipe, thereby eliminating the condensate generated by the high temperature flue gas in the sootblower pipe outside the furnace body. This avoids the condensate from flowing directly into the high temperature furnace tubes of the furnace body, which could cause corrosion or rupture of the sootblower pipes and furnace tubes. This solves the problem of condensate flowing into the furnace body from the ruptured pipe of the shock wave sootblower, which could cause furnace tube rupture and corrosion and gas leakage of the sootblower pipe.
[0019] (2) Without increasing equipment modification costs, the existing horizontal straight section closed pipe method is redesigned to be angled upward with the horizontal line and a closed ring condensate collection and evaporation drainage device is installed. This effectively solves the problems of furnace tube bursting and soot blowing pipe corrosion caused by the collection of condensate. It realizes the function of condensate diffusion and evaporation into water vapor and discharge with flue gas or timely discharge from the system, extends the service life of the boiler shock wave soot blower burst pipe, and reduces equipment maintenance costs.
[0020] (3) To extend the service life of sootblower pipes and furnace tubes and avoid the problems of condensate accumulation causing furnace tube cracking and corrosion of sootblower pipes, effectively ensuring the maximum sootblowing effect of shock wave sootblower and boiler operation safety. Attached Figure Description
[0021] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation
[0022] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.
[0023] This utility model provides a device for automatically removing condensate from the burst pipe of a boiler shock wave soot blower, such as... Figure 1 As shown. The boiler shock wave soot blower rupture pipe condensate self-removal device includes a horizontal section pipe 7 connected to the shock wave soot blower and a condensate collector sleeved on the horizontal section pipe 7. The connection part at the end of the horizontal section pipe is connected to the furnace body and is inclined upward at an angle a degree to the horizontal line. The side of the connection part near the condensate collector is lower than the inside of the furnace body.
[0024] The condensate collector is located outside the furnace wall 9 and includes a sealed collector 1 that is sealed on a horizontal pipe and a self-draining valve 4 installed at the bottom of the sealed collector 1. The bottom of the horizontal pipe 7 located inside the sealed collector 1 also has a drain hole. A heat transfer sleeve 6 is also sealed and fixed between the sealed collector 1 and the outside of the furnace wall 9 near the furnace body.
[0025] The horizontal section of pipe 7 is inclined upwards at an angle of 1 to 10 degrees to the horizontal line. In this embodiment, the horizontal section of pipe 7 is inclined upwards at an angle of 3 degrees to the horizontal line.
[0026] The bottom of the sealed collector is covered with an anti-corrosion layer 10, and the self-draining valve 4 is arranged on the anti-corrosion layer; preferably, the self-draining valve 4 is threadedly installed on the anti-corrosion layer 10.
[0027] The sealed collector 1 and the heat transfer sleeve 6 are fully welded together; and the annular outer wall of the sealed collector 1 is also provided with a heat insulation layer 5, which is made of aluminum silicate for heat insulation.
[0028] The present invention will be further described below with reference to the accompanying drawings.
[0029] The shockwave soot blower rupture pipe condensate self-removal device includes a sealed collector 1 for condensate collection, a self-draining valve 4, an insulation layer 5, a heat transfer jacket of φ180X2.5 6, a flat section pipe of DN150X8 7, a 5mm thick furnace wall 9, a 6mm anti-corrosion layer 10, and φ25mm threaded holes 11 on the anti-corrosion layer.
[0030] The flat section pipe of the shock wave sootblower is DN150x8, which passes through the heat transfer sleeve 6 of φ180X2.5mm on the furnace wall. The heat transfer sleeve 6 is fully welded to the furnace wall 9. The flat section pipe 7 is inclined upward at a 3-degree angle to the horizontal line, and the flat section pipe is fully welded to the heat transfer sleeve on the furnace wall to support the weight of the sootblower.
[0031] An 8mm water outlet is opened at the center of the bottom of the DN150x8 horizontal pipe section located 150mm from the outside of the furnace wall. The condensate collected by the horizontal pipe section of the soot blower 1.2 meters outside the furnace is discharged into the condensate collector.
[0032] Centered on the φ8mm water flow hole on the horizontal pipe 7, a ring-shaped sealing collector 1 with a thickness of 5mm, material of 45# steel, and a diameter of φ350X2mm is welded to achieve system sealing and condensate collection and evaporation.
[0033] The bottom of the annular sealing collector 1 is covered with an anti-corrosion layer 10, which can be made of 6mm thick anti-corrosion steel plate, material Q235.
[0034] When welding the φ350X5mm annular sealing collector 1, the center line of the DN150 flat section pipe 7 is used as the reference, with the upper half being 150mm and the lower half being 200mm.
[0035] A φ25mm threaded hole is made at the center of the anti-corrosion layer at the bottom of the annular sealing collector 1, and a condensate drain valve 4 is installed at the threaded hole 12 to allow excess condensate in the annular sealing collector 1 to be discharged in a timely manner.
[0036] During use, the condensate generated by the DN150X8 horizontal pipe 7 outside the shock wave soot blower furnace body is resisted by the 3° upward slope of the horizontal pipe entering the furnace body. The collected condensate preferentially enters the 6mm thick anti-corrosion layer 10 at the bottom of the φ350X2mm closed annular collector 1 through the φ10mm water flow hole. Because the φ350X2mm annular condensate collector 1 is fully welded to the DN150x8 horizontal pipe 7 and the φ180X2.5mm heat transfer sleeve 6, the internal temperature of the closed annular collector 1 is very high. Under the high temperature of the closed annular collector 1, a small amount of condensate is quickly evaporated into water vapor.
[0037] The flat section pipe 7 of the sootblower is connected to the furnace body. Under the negative pressure of the boiler system, the water vapor evaporated in the sealed annular collector 1 returns to the flat section pipe 7 through the φ10mm water flow hole and enters the furnace body through the 3° upward slope discharge port. Under the negative pressure of the flue gas system of the furnace body, the water vapor is discharged with the boiler flue gas. If there is a lot of condensate in the shock wave sootblower burst pipe during the rainy season, the water in the sealed annular collector 1 cannot be completely evaporated. The condensate remaining in the sealed annular collector 1 is discharged through the φ25mm wire hole 11 and the self-draining valve 4.
[0038] When installing the sealed collector 1, a pre-existing installation gap is provided to facilitate disassembly and maintenance.
[0039] This sealed annular condensate collector effectively solves the problem of condensate from high-temperature flue gas flowing into the furnace body from the 1.2-meter burst pipe outside the furnace. It prevents condensate from dripping onto high-temperature furnace tubes, causing tube bursts, and avoids the combination of condensate and corrosive gases from the flue gas forming a corrosive liquid that corrodes the sootblower pipes and furnace tubes. The collected condensate enters the condensate collector through a φ10mm orifice and quickly turns into water vapor under the heat transfer effect of the φ180X2.5mm furnace wall sleeve, then is discharged with the flue gas. Excess residual liquid is discharged through a φ25mm threaded hole 11 self-draining valve, eliminating the problem of sudden shutdowns caused by condensate bursting of high-temperature furnace tubes and corrosion of sootblower pipes during operation, thus ensuring compliance with flue gas emission standards.
[0040] This invention addresses the previous issues of condensate dripping from the blasting pipes of shockwave sootblowers into the furnace body, and the DN150 horizontal section of the blasting pipe outside the furnace body entering the furnace body at a 3-degree upward angle to the horizontal. By adding a self-draining device, this invention eliminates the safety hazards of condensate dripping from the blasting pipes into the furnace body, leading to cracks and leaks in the furnace tubes. It also solves the problem of corrosion and gas leakage in the sootblower pipes caused by the combination of condensate and corrosive flue gas, reducing unplanned equipment downtime and ensuring the safe and stable operation of the boiler.
[0041] This utility model, after being put into use in the retrofitting of waste heat boilers, reduced the number of equipment failures from once every 3 or 4 months to zero. It also solved the problems of condensate dripping from the shock wave sootblower pipe causing high-temperature furnace tube rupture and corrosion of the sootblower pipe. The manufacturing cost is low, making it economical and practical. It effectively solves the problems of condensate dripping from the sootblower pipe causing high-temperature furnace tube rupture and corrosion of the sootblower pipe, improves the boiler's safe operation coefficient, and makes maintenance and operation flexible and convenient.
[0042] If this patent uses terms such as "first" and "second" to define components, those skilled in the art should know that the use of "first" and "second" is merely for the convenience of describing this utility model and simplifying the description, and the above terms have no special meaning.
[0043] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
[0044] In the description of this utility model, it should be understood that the terms "front", "rear", "left", "right", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used to facilitate the description of this utility model and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this utility model.
Claims
1. A boiler shock pimple device burst pipe condensate self-removal device, characterized in that: It includes a flat section pipe connected to the shock wave soot blower and a condensate collector sleeved on the flat section pipe. The connection part at the end of the flat section pipe enters the furnace body and communicates with the furnace body and is arranged at an angle a degree upwards from the horizontal line. The side of the connection part near the condensate collector is lower than the inside of the furnace body. The condensate collector is located outside the furnace wall and includes a sealed collector fitted on a horizontal pipe section and a self-draining valve installed at the bottom of the sealed collector. A drain hole is also opened at the bottom of the horizontal pipe section located inside the sealed collector. A heat transfer jacket is also sealed and fixed between the sealed collector and the outer side of the furnace wall.
2. The boiler shock wave soot blower rupture pipe condensate self-removal device according to claim 1, characterized in that: The connecting part is inclined upwards at an angle of 1 to 10 degrees to the horizontal line.
3. The boiler shock wave soot blower rupture pipe condensate self-removal device according to claim 2, characterized in that: The connecting part is inclined upward at 3 degrees to the horizontal line.
4. The boiler shock wave soot blower rupture pipe condensate self-removal device according to claim 1, characterized in that: The bottom of the sealed collector is covered with an anti-corrosion layer, and the self-draining valve is installed on the anti-corrosion layer.
5. The boiler shock wave soot blower rupture pipe condensate self-removal device according to claim 1, characterized in that: The sealed collector and the heat transfer jacket are fully welded together.
6. The boiler shock wave soot blower rupture pipe condensate self-removal device according to claim 1, characterized in that: The sealed collector also has an insulation layer on its annular outer wall.
7. The boiler shock wave soot blower rupture pipe condensate self-removal device according to claim 4, characterized in that: The self-draining valve is threaded onto the anti-corrosion layer.