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Watertube Boiler Question
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(Mechanical)
(OP)
2 Jun 20 08:16Hi all,
I don't have so much experience on steam boilers and interested to know more.
Is there a type of water-tube boiler which has its steam drum or water drum exposed to heat (either radiation or convection)?
Thanks very much for your help.
Aida Hanani
Replies continue below
(Electrical)
2 Jun 20 10:06Hello Rebecca/Aida,I have not seen every type of water tube boiler in existence, but in my experience only a nominal to minimal amount, if any at all, of any of the drum surfaces are normally "exposed to heat," as the ligaments between tubes are of a relatively low proportion of that part of the surface of the drum that faces the furnace.Depending on design, generally one half or more of the drum surfaces are lagged, as this lagging together with that on the waterwalls comprises the cladding which encloses and seals the furnace / combustion space / gas passages against leakage.
CR
"As iron sharpens iron, so one person sharpens another." [Proverbs 27:17, NIV]
(Petroleum)
2 Jun 20 12:46
Normally steam drum or water drum is exposed to heat of convection.
luis
(Petroleum)
2 Jun 20 16:08Rebecca Hannah see the video bellow. The other doesn´t work. Sorryluis
(Mechanical)
2 Jun 20 19:02Water tube boilers are the most common.
(Petroleum)
2 Jun 20 20:25hacksaw
the most common I think, unless those of the old steam train machines.
(Mechanical)
2 Jun 20 21:37IMHO, it is important to remember the purpose and function of the steam drum to answer your question.The steam drum provides a volume where the steam-water influent (from the boiler tubes) can disengage and the steam can shed some water droplets. The steam drum also directs effluent flow into the downcomers thereby allowing thermal circulation through the system.The steam drum also contains a maintained volume of water that will permit system upsets and changes in steam demand.Finally, the steam drum also becomes a place where solids collect for that all-important continuous blowdown housekeeping requirement.Sooooo.... With all of these requirements, it makes more sense to consider the function of the steam drum to be anything but as additional heat transfer area.Structurally, the weakest point in any water-tube boiler is the location where the tubes penetrate the shell of the steam drum, To further stress this area by subjecting it to the ever changing heat of the fuel seems very unwisePurchasing this book is money well spent:
MJCronin
Sr. Process Engineer
(Mechanical)
3 Jun 20 02:25my 40th Ed, still gets a bit of use, and a lot of the content is helpful beyond, just boilers.
(Mechanical)
4 Jun 20 14:05A thin walled drum probably would not have much of a problem as long as it was always filled halfway with water, but a thick walled drum cannot be permitted to absorb a lot of heat from the combustion gases, as it would generate a thermal stress that would bow or bananna the drum. For that reason steam drums either have insulation under them or at least a radiation shield, and large thick drums are normally located separate from the furnace in a penthouse. A dry drum asorbing heat would fail, as would the waterwalls, if there was heat transfer occurring while it was empty. Another issue is that small low pressure boilers usually have rolled tube to drum attachments, and the thermal stress could fail the rolled joints.
"...when logic, and proportion, have fallen, sloppy dead..." Grace Slick
(Chemical)
5 Jun 20 14:32@ Davefitz , if i remember correctly , most of the Bi-drum Boiler (Industrial Boiler)Bottom of the top drum is in the flue gas path??Further Ligament effeciance is much small in the range of 45-60%
(Mechanical)
6 Jun 20 03:42True, but the mud drum is always 100% full so there is no oeverheat of the top surface, and the flue gas temperature is relatively low. In the convective pass that temp may be -500F while the furnace exit temp may be F or more, with significant radiant heat flux..
"...when logic, and proportion, have fallen, sloppy dead..." Grace Slick
(Chemical)
6 Jun 20 11:17@ Davefitz. Agreed. If i understand the Question correctly '' Is there a type of water-tube boiler which has its steam drum or water drum exposed to heat (either radiation or convection)?''
the Answer is 'Yes' . to my Knowledge not by Radiation but by Convection - and not in the power Generation Boilers but in the Industrial Boilers.
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The industrial steam boiler system holds paramount importance in a diverse array of manufacturing and industrial workflows. Serving as a vital heat-generating system, it finds extensive applications across various sectors, ranging from hospitals and universities to laundry, food processing, breweries, factories, and numerous others. All these industries, and many more, rely on some form of steam boiler system to facilitate their operations with heat or hot water.
Gaining a thorough understanding of the system's core components and adhering to proper operational guidelines is essential for ensuring the smooth functioning of industrial production. In practical usage, numerous users encounter queries regarding the system's key components and operational procedures when managing industrial steam boilers. Therefore, a deeper knowledge and professional guidance are often sought. Queries may encompass, but are not limited to, the following topics:
l What Are The Components of An Industrial Steam Boiler System?
l How Does An Industrial Steam Boiler System Work?
l How To Operate an Industrial Steam Boiler System?
As a leading industrial boiler manufacturer and supplier, EPCB Boiler produces industrial steam boilers with excellent performance and quality, which are widely used in the industrial field, helping companies achieve efficient production and achieve greater success. EPCB custom indutrial steam boiler products include gas steam boiler, oil fired steam boiler, biomass boiler, coal fired boiler and electric steam boiler, and more. ODM/OEM are available.
In this blog, we will explore the components of a steam boiler system and how to properly operate and maintain this critical equipment to ensure that it operates efficiently and stably to promote the continued development of industrial production.
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1. What Are The Main Components Of An Industrial Steam Boiler System?
1.1 What Are Types Of Industrial Steam Boiler Systems
From the perspective of steam boiler manufacturers, there are 5 types of industrial steam boilers most commonly used in industrial applications, which are oil-fired steam boilers, gas-fired steam boilers, coal-fired steam boilers, biomass steam boilers and industrial electric steam boilers. EPCB Boiler specializes in customized steam boiler system design, manufacturing and installation services. It has customized industrial steam boiler systems for thousands of industries,help them become industry leaders.
1.2 What Are Main Components of An Industrial Steam Boiler System?
Different industrial steam boiler systems are composed of different components, usually consisting of the following main components:
1.2.1 Intelligent control system
The intelligent control system of a boiler is a system that integrates advanced technology to monitor, control and optimize the operation of the boiler. Monitor and control various parameters of boiler operation to ensure safe and stable operation of the boiler. The control system includes automatic regulating valves, sensors, control panels, etc.
1.2.2 Combustion system
The area used to burn fuel to produce heat. The fuel burns in the furnace and the heat released is used to heat water, producing steam.
1.2.3 Water supply system
The water supply system of the boiler refers to the system used to provide water to the boiler. It plays the role of transporting, purifying and replenishing water. Through the water supply system, the boiler can obtain a sufficient source of clean water to generate the required steam or hot water, and it reduces boiler damage and operational failures caused by water quality problems.
1.2.4 Energy saving system
Boiler energy-saving system refers to a system that reduces boiler energy consumption and improves energy utilization efficiency by adopting a series of technologies and measures. These systems are designed to minimize energy waste, reduce operating costs, and reduce environmental impact.
1.2.5 Interlock protection system
The boiler interlock protection system is an important system used to ensure the safe operation of the boiler. It monitors, controls and protects various parameters and status of the boiler to ensure that the boiler operates stably within a safe range.
1.2.6 Steam supply system
The boiler steam supply system refers to the system that transports the steam generated by the boiler to the equipment or process that requires steam. It is an important part of the industrial production process and directly affects the operation and efficiency of production equipment.
1.2.7 Emission system
A system used to treat and control the exhaust gases and wastewater produced by boiler combustion. Through the design and operation of the above emission system, the boiler can effectively reduce the impact on the environment, ensure that the emission level meets the requirements of laws and regulations, and achieve the goals of environmental protection and sustainable development.
2. How Does An Industrial Steam Boiler System Work?
2.1 Working Principle of Industrial Steam Boiler System
There are many types of industrial steam boilers, but they are all designed to generate steam for different industrial purposes. EPCB Boilers, being an industry leader, play an important role in this field. Next, EPCB Boiler will introduce the basic working principles of industrial steam boilers:
Fuel combustion and heat release: EPCB Boilers can be used with a variety of fuels, such as coal, natural gas, and oil. These fuels are ignited in the boiler furnace, releasing the heat energy required for high-temperature combustion. At the same time, EPCB Boilers focus on combustion efficiency and environmental protection performance, reducing emissions and improving energy utilization through advanced combustion technology and exhaust gas treatment systems.
Heating and conversion of water into steam: The heating system of the EPCB Boiler is carefully designed to ensure an efficient heat transfer process. The heat energy is transferred to the surrounding tube bundles through the furnace wall casing or directly to the drum so that the water is quickly heated. EPCB Boilers use advanced heating technology to ensure rapid heating and efficient conversion of water into steam.
Steam collection and distribution: Once the water is heated and converted into steam, it will be collected centrally in the steam container at the top of the boiler. EPCB Boilers are equipped with a reliable steam distribution system that delivers steam to where it is needed, such as machinery, heating systems, or processes, ensuring the smooth operation of the production process.
Emission of flue gas: When fuel burns and releases heat energy, flue gas and waste gas are produced and discharged through the flue. A flue is a system of channels that guide flue gases into the atmosphere. The EPCB Boiler&#;s flue gas treatment system uses advanced technology, including flue gas purifiers and other equipment, to minimize pollutant emissions in the exhaust gas, protect the environment, and comply with relevant regulatory standards.
Overall, the working process of an EPCB Boiler includes a continuous cycle of fuel combustion, heat transfer, heating and water conversion to steam, steam collection and distribution, and flue gas emission. EPCB Boilers are committed to efficiently converting fuel energy into usable steam energy to meet the power, heating, and control needs of industrial production while ensuring energy conservation and environmental protection, and providing customers with reliable industrial steam boiler system solutions.
3. How To Operate Industrial Steam Boiler System
Operating an industrial steam boiler system involves several key steps to ensure efficient and safe operation. Here's a summary of how to operate an industrial steam boiler system:
Pre-Startup Checks:
Check the boiler water level and ensure it's at the normal operating level.
Open the water inlet valve to fill the boiler to the desired water level.
Check the level gauges and other instrumentation for accuracy.
Close the water inlet valve once the desired water level is reached.
Verify that the fuel supply (e.g., coal, natural gas, oil) is available and the fuel valves are closed.
Check the upstream and downstream valves and ensure they are in the correct positions.
Inspect all control systems and set them to the off position.
Startup Procedure:
Turn on the water pump to maintain the boiler water level.
Open the blowdown valve to drain any contaminants from the boiler until clean water appears.
Start the air preheater, induced fan, and exhaust fan.
Open the fuel valve and ignite the burner to start the combustion process.
Monitor the boiler closely during startup to ensure all systems are functioning properly.
Operation and Monitoring:
Continuously monitor the boiler's water level, pressure, and temperature.
Adjust the fuel supply and combustion rate to maintain the desired steam output and efficiency.
Periodically check the boiler's instrumentation, including gauges, thermometers, and pressure switches.
Inspect the burner and combustion chamber for any abnormalities or buildup of deposits.
Shutdown Procedure:
Gradually reduce the fuel supply and combustion rate to cool down the boiler.
Close the fuel valve and turn off the burner.
Turn off the water pump, air preheater, induced fan, and exhaust fan.
Drain the boiler of any remaining water to prevent freezing or corrosion.
Maintenance and Safety:
Regularly inspect and maintain the boiler's components, including valves, gaskets, and instrumentation.
Follow the manufacturer's recommendations for cleaning and descaling the boiler.
Ensure all safety devices, such as pressure relief valves and temperature alarms, are functioning properly.
Provide training to operators on safe operation and emergency procedures.
It's important to note that the specific operating procedures for an industrial steam boiler system may vary depending on the manufacturer, model, and application. Always refer to the manufacturer's operating manual and safety guidelines for detailed instructions.
4. Conclusion
In industrial production, EPCB Boiler, as a reliable thermal energy solution provider, play a crucial role in the industrial steam boiler systems produced by EPCB, providing necessary heat energy and power for the production process. The above article focuses on the key components of industrial steam boiler systems and operating guidelines to help readers better understand and manage this critical equipment.
Maintaining and operating a steam boiler system requires certain expertise and skills, as well as caution and attention. Only through correct operation and regular maintenance can the efficient operation and safety of the steam boiler system be ensured. Therefore, EPCB Boiler users are encouraged to follow the operating guidelines provided in this article in daily operations and pay close attention to the operating status and maintenance needs of the system. We hope this article helps you better understand and manage industrial steam boiler systems to ensure the smooth and safe operation of your production process.
If you have any questions about industrial steam boiler system, please contact us.