System for preventing water carryover in long-term operation of steam sootblowers
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DATANG HUANGDAO POWER GENERATION
- Filing Date
- 2025-09-10
- Publication Date
- 2026-08-07
AI Technical Summary
[0003]本实用新型的目的就是为了解决蒸汽吹灰器无法在运行中疏水等问题，提供一种防止蒸汽吹灰器长时间运行中带水的系统
[0006]1、本实用新型在旁路管道上加装旁路电磁阀，可以使锅炉内的冷凝水排出，降低锅炉因为蒸汽带水造成锅炉受热面减薄过多造成爆管的现象，降低安全隐患。
Smart Images
Figure CN224607704U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a water treatment system for steam soot blowers during long-term operation. Technical Background
[0002] During prolonged operation, the temperature of the steam in the lower part of the steam sootblower gradually decreases, eventually condensing into water. As the water level rises, this water carryover occurs in the steam, thinning the heating surface. Excessive thinning can even cause tube rupture, forcing the boiler to shut down. Currently, the steam sootblower is only drained once before commissioning, making it impossible to drain during operation. This is the root cause of water carryover during prolonged operation. The inability to drain during operation is due to the original electric drain valve causing severe system depressurization upon opening, resulting in low steam pressure for the sootblower. This prevents sootblowing and can even cause the long rod of the sootblower to deform due to insufficient heat carried by the steam, becoming stuck inside the furnace and posing a safety hazard. Utility Model Content
[0003] The purpose of this invention is to solve the problem that steam soot blowers cannot drain water during operation, and to provide a system to prevent water from entering the steam soot blower during long-term operation.
[0004] To address the aforementioned shortcomings, this utility model adopts the following technical solution: A system for preventing water carryover in steam sootblowers during prolonged operation comprises: a sootblowing gas source main pipe, which is divided into an auxiliary sootblowing gas source pipe and a sootblowing gas source branch pipe. The auxiliary sootblowing gas source pipe is connected to an air preheater. The sootblowing gas source branch pipes are respectively connected to the sootblower inlet pipes in the left wall, front wall, right wall, and rear wall areas of the boiler body. A bypass pipe is fixedly installed at the lowest point of each sootblower inlet pipe. A bypass manual valve and a bypass solenoid valve are installed on the bypass pipe.
[0005] The system for preventing water from entering the steam sootblower during long-term operation includes an electric drain valve and a manual drain valve installed at the lowest point of each sootblower inlet pipe. Beneficial effects
[0006] 1. This utility model adds a bypass solenoid valve to the bypass pipeline, which can discharge the condensate in the boiler, reduce the phenomenon of boiler tube rupture caused by excessive thinning of the boiler heating surface due to steam carrying water, and reduce safety hazards.
[0007] 2. When the bypass solenoid valve installed on the bypass pipeline of this utility model has internal leakage, the bypass manual door can be opened for isolation and maintenance, which reduces the frequency of boiler shutdown and reduces the economic losses of the factory.
[0008] 3. The sootblowing gas source of this utility model supplies steam to the sootblower through the sootblowing gas source header. A drain valve is installed at the lowest point or a location prone to water accumulation in the sootblower inlet pipe. The drain valve is connected to the steam pipeline system through a pipeline. When condensate is generated during steam transportation, and when the temperature before the drain valve is below 120°C, the bypass solenoid valve automatically opens to discharge the condensate, ensuring that the dryness of the steam entering the sootblower meets the requirements and preventing wet steam from affecting the sootblowing effect or damaging the equipment. When the temperature before the drain valve reaches 180°C, the bypass solenoid valve automatically closes. When the solenoid valve leaks internally, the bypass valve can be closed for isolation and maintenance. Attached Figure Description
[0009] Appendix Figure 1 This is a flowchart of the soot blowing system of this utility model; In the diagram: 1. Bypass manual door; 2. Bypass solenoid valve; 3. Soot blower; 4. Bypass pipe; 5. Manual drain valve; 6. Electric drain valve; 7. Air preheater; 8. Soot blowing gas source main pipe; 9. Auxiliary soot blowing gas source pipe; 10. Soot blowing gas source branch pipe; 11. Soot blower inlet pipe. Detailed Implementation
[0010] Reference Figure 1 A system for preventing water carryover in steam soot blowers during long-term operation comprises: a soot blowing gas source main pipe 8, which is divided into an auxiliary soot blowing gas source pipe 9 and a soot blowing gas source branch pipe 10. The auxiliary soot blowing gas source pipe is connected to an air preheater 7. The soot blowing gas source branch pipes are respectively connected to soot blower inlet pipes 11 in the left wall, front wall, right wall and rear wall areas of the boiler body. A bypass pipe 4 is fixedly installed at the low point of each soot blower inlet pipe. A bypass manual door 1 and a bypass solenoid valve 2 are installed on the bypass pipe.
[0011] Each soot blower inlet pipe is equipped with an electric drain valve 6 and a manual drain valve 5 at its lowest point.
[0012] The bypass pipeline is equipped with a bypass solenoid valve. The bypass solenoid valve on the bypass pipeline is automatically opened or closed according to the temperature before the manual drain valve. When the bypass solenoid valve is opened, the condensate can be discharged to avoid safety hazards caused by high boiler temperature.
[0013] The bypass pipeline is equipped with a bypass manual valve. When the bypass solenoid valve on the bypass pipeline leaks internally, the bypass manual valve can be manually closed for isolation and maintenance.
[0014] The sootblowing gas source supplies steam to the sootblower through the sootblowing gas source header. A condensate drain valve is installed at the lowest point or a location prone to water accumulation in the sootblower inlet pipe. The condensate drain valve is connected to the steam pipeline system through a pipeline. When condensate is generated during steam transportation, and when the temperature before the manual condensate drain valve is below 120°C, the bypass solenoid valve automatically opens to discharge the condensate, ensuring that the dryness of the steam entering the sootblower meets the requirements and preventing wet steam from affecting the sootblowing effect or damaging the equipment. When the temperature before the manual condensate drain valve reaches 180°C, the bypass solenoid valve automatically closes. If the solenoid valve leaks internally, the bypass manual valve can be closed for isolation and maintenance.
Claims
1. A system for preventing water carryover during prolonged operation of a steam soot blower, comprising: The soot blowing gas source main pipe is characterized in that: the soot blowing gas source main pipe is divided into an auxiliary soot blowing gas source pipe and a soot blowing gas source branch pipe; the auxiliary soot blowing gas source pipe is connected to the air preheater; the soot blowing gas source branch pipes are respectively connected to the soot blower inlet pipes in the left wall, front wall, right wall and rear wall areas of the boiler body; a bypass pipe is fixedly installed at the low point of each soot blower inlet pipe; and a bypass manual valve and a bypass solenoid valve are installed on the bypass pipe.
2. The system for preventing water carryover during long-term operation of a steam soot blower according to claim 1, characterized in that: Each soot blower inlet pipe is equipped with an electric drain valve and a manual drain valve at its lowest point.