Hangguo:Your Professional Bypass Stack Manufacturer!
Hangzhou Hangguo General Equipment Co., Ltd. has been established since December, 2000. As a subsidiary of XIZI Clean Energy Equipment Manufacturing Co,.tld.（Stock code：002534）the Company specializes in the design and manufacture of auxiliary engine and heavy duty equipment for boilers. The company has produced 115 sets of flue gas bypass systems and 152 sets of flue gas baffle doors, covering all continents in the world.
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![HRSG Bypass Stack System]()
HRSG Bypass Stack SystemBypass stack is self-support structure, the gas path is ID 8000mm, and it design as rainproof. The casing of stack is roll up by steel stack.read more -
![High Quality Bypass Dampers 4WD Adjustable Dampers]()
High Quality Bypass Dampers 4WD Adjustable DampersBypass stack is self-support structure, the gas path is ID 8000mm, and it design as rainproof. The casing of stack is roll up by steel stack.read more -
![Exhaust Gas Bypass System]()
Exhaust Gas Bypass SystemBypass stack is self-support structure, the gas path is ID 8000mm, and it design as rainproof. The casing of stack is roll up by steel stack.read more -
![Main Stack & Bypass Stack Silencers]()
Main Stack & Bypass Stack SilencersBypass stack is self-support structure, the gas path is ID 8000mm, and it design as rainproof. The casing of stack is roll up by steel stack.read more -
![HRSG BYPASS STACK DAMPERS]()
HRSG BYPASS STACK DAMPERSBypass stack is self-support structure, the gas path is ID 8000mm, and it design as rainproof. The casing of stack is roll up by steel stack.read more -
![Self-support Structure Bypass Steel Stack]()
Self-support Structure Bypass Steel StackBypass stack is self-support structure, the gas path is ID 8000mm, and it design as rainproof. The casing of stack is roll up by steel stack.read more -
![Self-support Structure Bypass Stacks]()
Self-support Structure Bypass StacksBypass stack is self-support structure, the gas path is ID 8000mm, and it design as rainproof. The casing of stack is roll up by steel stack.read more -
![Self-support Structure HRSG Bypass Stacks]()
Self-support Structure HRSG Bypass StacksBypass stack is self-support structure, the gas path is ID 8000mm, and it design as rainproof. The casing of stack is roll up by steel stack.read more -
![HRSG Bypass Stacks]()
HRSG Bypass StacksBypass stack is self-support structure, the gas path is ID 8000mm, and it design as rainproof. The casing of stack is roll up by steel stack.read more -
![Heat-Recovery Steam Generators And Bypass Stacks]()
Heat-Recovery Steam Generators And Bypass StacksBypass stack is self-support structure, the gas path is ID 8000mm, and it design as rainproof. The casing of stack is roll up by steel stack.read more -
![Bypass Stack with Lighting System]()
Bypass Stack with Lighting SystemThe casing of stack is equipped with a lighting system, which is convenient for maintenance personnel to walk and overhaul at night. The illumination of each floor platform is calculated and designedread more -
![Insulation Bypass Chimney]()
Insulation Bypass ChimneyThe internal insulation system consists of Insulation, Liner Panels, Retaining/Supporting Studs and hardware (see Figure 8).read more
Why Choose Us
Rich Experience
Hangguo has been developing, designing and manufacturing bypass systems for more than 20 years, the bypass systems of T130, FT8,5B, 6B, 6FA, 9E, 7FA, V94.2, SGT5-4000F, SGT5-5000F, 9F, 9HA, Sgt5-8000h and M701J have been successfully developed, designed and manufactured.
Our Products
Our products cover GE, Siemens, MHI,Ansaldobreda and other major gas engine suppliers of various main power generation, models, the company supplies 126 sets of gas engine bypass system, among them, 48 sets of 9F and above gas turbine bypass chimney supply performance.
High Quality
Our company has established a sound quality management system and passed the approval of ISO9000, ISO14000 and OHSAS18001 China quality certification center. The company has been awarded the title of "advanced enterprise of social responsibility" by hangzhou municipal people's government, and is the cultivation enterprise of hidden champion in yuhang district.
Advanced Equipment
Our company has advanced machining equipment, including CNC gantry cutting machine, horizontal 8-meter lathe, gantry planer, boring machine, hydraulic bending machine, automatic welding machine, CNC machining center and other advanced equipment, capable of processing various parts. In addition, it also has a large number of processing equipment such as lathe, milling, planing, grinding, boring, slotting machine, etc., which can meet the processing needs of various parts, as well as key equipment and facilities such as large shot blasting room and paint spraying room.
Advantages of Bypass Stack
Simple vs. Combined Cycle
The bypass stack allows a power plant to switch between simple cycle (gas turbine only) and combined cycle (gas turbine + steam turbine) operation based on demand and conditions. This flexibility is crucial for optimizing power generation efficiency and meeting peak demand.
Independent GT Operation
The bypass stack isolates the GT from the ST and HRSG, enabling the GT to continue operating even if the ST or HRSG is down for maintenance or repairs. This prevents costly downtime and power outages.
Rapid Start-up and Shutdown
Bypass stacks facilitate faster startup and shutdown procedures, allowing plants to respond quickly to changing power demands and grid requirements.
Reduced Thermal Stress on HRSG
By allowing the GT exhaust gases to bypass the HRSG, the bypass stack minimizes thermal stress on the HRSG during startup and shutdown, extending its lifespan and reducing maintenance costs.
Lower Construction Costs
The bypass stack reduces the need for costly, flexible HRSG designs, as the HRSG is not constantly exposed to the hot exhaust gases from the GT.
Reduced Cycling Fatigue
The bypass stack can minimize cycling of the gas turbine during system trips, reducing wear and tear and extending the turbine's lifespan.
Fuel Efficiency
The ability to operate in simple cycle during off-peak hours or when the ST is down can lead to fuel savings.
Reduced Emissions
By allowing for the GT to operate independently, the bypass stack can help optimize emissions control strategies, such as using less fuel or switching to alternative fuels during different operating modes.
Application of Bypass Stack
Switching between Combined and Simple Cycle Operation
Combined Cycle:
The exhaust gases from the gas turbine heat the water in the HRSG to produce steam, which then drives the steam turbine, generating additional power.
Simple Cycle:
The bypass stack diverts the exhaust gases directly to the atmosphere, bypassing the HRSG. This allows the gas turbine to operate independently, generating power without the need for the steam turbine cycle.
Maintenance and Troubleshooting of the HRSG
When the HRSG needs to be taken offline for maintenance or repairs, the bypass stack provides a way to safely vent the exhaust gases, allowing the gas turbine to continue operating.This ensures that power generation is not disrupted while the HRSG is undergoing repairs.
Startup and Shutdown of the Power Plant
During the startup and shutdown processes, the steam cycle may not be fully operational, and the bypass stack can be used to temporarily bypass the HRSG while the steam turbine cycle is ramping up or down.
Emergency Situations
If the steam turbine experiences a trip (emergency shutdown), the bypass stack can be used to ensure that the gas turbine continues to operate and that the exhaust gases are safely vented.
Other Applications
In some industrial applications, bypass stacks are used to control the discharge of combustion gases from other processes, such as drying or heating, to ensure that air pollution control devices are not damaged or overloaded.
Maintenance of Bypass Stack
Just as with any major power plant equipment, the Heat-Recovery Steam Generator and the bypass stack require regular maintenance. These components are subject to extremely high temperatures. Although these components work together to extend the lifecycle and efficiency of the plant, they must be in proper working order and in good condition to function at full capacity. In combined-cycle power facilities or in industrial cogeneration plants, the HRSG is an important component to the plant’s total, overall efficiency. Since the HRSG & bypass stack are large metal structures commonly exposed to wide temperature fluctuations & environmental concerns, the system needs proactive attention to ensure continued reliability.
Regular Inspections:
Visual Inspection: Regularly check the bypass stack for any signs of damage, such as cracks, rust, or corrosion, especially after periods of high usage or extreme weather.
Leak Checks: Ensure there are no leaks in the system, which can compromise its efficiency and potentially lead to safety hazards.
Structural Integrity: Inspect the stack's structure for any signs of deformation or instability.
Damper Function: Verify that any dampers in the bypass system are operating correctly and sealing properly.
Maintenance and Repairs:
Cleaning: Regularly clean the bypass stack to remove any build-up of soot or debris, which can affect its performance.
Corrosion Protection: Apply protective coatings or treatments to prevent corrosion, especially in areas exposed to harsh conditions.
Repair or Replacement: Address any damage or leaks promptly by repairing or replacing damaged components, such as liners, seals, or structural elements.
Proper Ventilation: Ensure that the bypass stack has adequate ventilation to prevent overheating and potential safety hazards.
Specialized Maintenance:
HRSG and Bypass Stack: In some cases, the bypass stack is integrated with a Heat-Recovery Steam Generator (HRSG), which requires specialized maintenance.
Professional Assistance: Consider engaging experienced professionals for specialized maintenance tasks, such as inspections, repairs, or replacement of HRSG components.
Packaging and Shipping
Our Certificates
FAQ
We're professional bypass stack manufacturers and suppliers in China for over 20 years, featured by good service and competitive price. We warmly welcome you to buy high quality bypass stack made in China here from our factory.
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