Why Boiler Exhaust Gas Need To Be Maintained, energy-saving coal & biomass fired thermal oil heaters

Riviera - Opinion - How will the 2020 sulphur cap affect your boiler?

The burner and control panel will need to be replaced. Also, gas flames have less radiation heat transfer, so a boiler designed for fuel oil may require a study to be completed to see if its capacity can be maintained at the same rating as using fuel oil.

Exhaust gas heat recovery boiler

The Aalborg AV-6H exhaust gas boiler is a water tube boiler for heat recovery, typically after gas engine. The boiler comes in a horisontal layout and compact work-shop assembled module. It is easy and fast to install while allowing maximised access for convenient maintenance and service. • High-efficient counterflow design for heating of hot ...

What is the use of a damper in a boiler?

1/13/2018 · The method and speed of opening the insulation varies from kettle to other. Some open up 6 percent every minute until it reaches The complete opening of steam production, and in the case of insulation is a key element to protect the boiler from the exhaust of the turbine.

Boiler Combustion

Selective non-catalytic reduction involves the injection of a NOx reducing agent, such as ammonia or urea, into the boiler exhaust gases at a temperature of approximately 1400-1600°F. The ammonia or urea breaks down the NOx in the exhaust gases into water and atmospheric nitrogen. Selective non-catalytic reduction reduces NOx up to 70%.

Guide to Managing the Condensate for Condensing Water Heaters

The condensing process is achieved by passing the piped hot flue gases through the cooler return water flowing back into the boiler. Flue gas starts to condense when it drops below its dew point of 55°C. This is why condensing boilers are designed to accommodate a return water temperature of 54°C or less.

What is fuel air ratio and what %ge it is maintained in boiler?

It is a amount of air and fuel mixed in a proper proportion so that the fuel atomized inside get burnt fully . This proportion is fixed by the servo motor in the boiler. The servomotor will be connected to flaps and they send the desired amount of...

Exhaust gas economizer on auxiliary engines

Exhaust gas economizer on auxiliary engines. A case study of potential savings that can be made by installing an exhaust gas economizer on an auxiliary diesel engine. Diploma thesis in the Marine Engineering Programme . DANIEL HENRIKSSON . RIKARD NYMAN VIERTO

Gas Boiler Venting: Importance of Proper Ventilation and

Gas boiler venting has always been of great importance. Why? It helps to prevent the occurrence of rot in under-floor voids and roof spaces, lets in enough oxygen for solid fuel and gas used in the burning process, lets out carbon dioxide, fumes and water vapor, etc.

Oil & Gas Furnace Flues Need Cleaning

10/14/2014 · The majority of homeowners with wood-burning stoves and/or fireplaces understand the need for an annual chimney cleaning and inspection.On the flipside, many homeowners don’t realize that their oil and/or gas heating appliances—be it a furnace, boiler or even a hot water heater—also rely on a chimney for proper venting of the exhaust.

Boiler (power generation)

A boiler or steam generator is a device used to create steam by applying heat energy to water.Although the definitions are somewhat flexible, it can be said that older steam generators were commonly termed boilers and worked at low to medium pressure (7–2,000 kPa or 1–290 psi) but, at pressures above this, it is more usual to speak of a steam generator.

Why should the flue gas temperature be observed frequently

Flue gas is a type of exhaust gas that exits the atmosphere througha pipe often called a flue. Flue gas can be seen exiting powerplants, a fireplace, oven, boiler or steam generator. share with ...

Boiler Room Air Supply

The proper operation of any boiler is dependent on the systems that support and connect to it. These include, but are not limited to; the boiler room fresh air supply, flue gas exhaust system, fuel delivery system, power distribution grid, and the steam or hot water

Combustion Fundamentals - Industrial Wiki

Static pressure is progressively lower as gas travels from the inlet to the induced draft fan. Induced draft (ID) fans exhaust combustion products from the boiler. In doing so, they create sufficient negative pressure to establish a slight suction in the furnace (0.2 to 0.5 inches of water). An airfoil centrifugal fan is typically used.

Boiler energy efficiency measures

Boiler energy efficiency measures - shipboard good practices Formation of marine boiler : A boiler in one form or another will be found on every type of ship. Where the main machinery is steam powered, one or more large watertube boilers will be fitted to produce

Back to Basics: Venting for Gas-Fired Boilers | 2003-06-04

The rating plate contains basic information about the boiler, such as the manufacturer, model number, input and the vent category. All gas-fired, low pressure steam and hot water boilers certified to the ANSI Z21.13 standard are required to have the vent system category (I, II, III or IV) on the rating plate.


Waste Heat Inlet Gas Temperature °F 600—2,500 Waste Heat Mass Gas Flow Lbs/hr 1,000—400,000 FIG. 1 Since 1864 Johnston Boiler Company has built a reputation on innovative designs and rigid adherence to quality. We believe that boilers must be dependable. Today, as in 1864, Johnston’s employees take personal pride in the

Venting a Natural Gas Fired Boiler

12/22/2007 · I'm not all that familiar with HVAC issues and looking for some explanation and help with venting a natural gas furnace for hot water baseboard heat. This would be for construction with new house. Is it necessary to vent directly into a brick chimney or if I …

Do I need new flue when replacing combi boiler with the same

I'm replacing the old and non working combi boiler with a new combi boiler from the same brand. Do I need to replace the flue too or can I safely use the existing one? Is there any other cost associated other than the new boiler and labour for gas safe plumber?


Early boilers provided this stream of air, or draught, through the natural action of convection in a chimney connected to the exhaust of the combustion chamber. Since the heated flue gas is less dense than the ambient air surrounding the boiler, the flue gas rises in the chimney, pulling denser, fresh air into the combustion chamber.

Why economiser is used in boiler

Boiler is an energy conversion device, the energy input to the boiler with the fuel chemical energy, electrical energy, high-temperature flue gas heat, etc., and after boiler conversion, exporting ...

Efficiency in boilers and beyond

In the 1960s, the number of boilers for shipyards around Europe increases. During this decade, the unique combined oil and exhaust gas boiler is designed and introduced to the market. In 1998, the first large oil-fired boiler MISSION OL is delivered. The boiler is a result of the best technology from Sunrod and Aalborg Industries. 1919 1960s ...

Boiler or Furnace Service- why do I need one and what will

Apr 18, 2016 · A well-maintained furnace costs less to run and systems that have been maintained each year will last longer – in some cases twice as long! That goes for your furnace, boiler, water heater and even your natural gas fireplace. One final tip to leave you with.

Marine Engineering Knowledge

Describe three different types of tube used for exhaust gas boilers. Give two reasons why a tube would be condemned. How would a leaking tube to be rectified? How can the operating efficiency of an exhaust gas boiler be maintained at an acceptable level?

Steam Boiler Questions and Answers

If you have a diesel engine exhaust gas economizer then 7 bar boiler pressure would gain more heat from the exhaust gases. Boiler Questions and Answers Question: Cavitation in a two flow line We have a steam genereting facilty using process heat.

Factory owners must ensure the boiler is

boiler and may cause boiler explosion with consequent injuries to personnel. * All automatic safety devices such as safety valve, pressure switch and low-water cut-off switches should be tested periodically to ensure they are in good working condition at all times. * If accident happens to a boiler or its auxiliary, owner must immediately stop

Everything You Need to Know About Combustion Chemistry

12/9/2010 · The modulating boiler is a combustion system that adjusts its firing level and steam production to meet a changing output demand. ... a range of fuel compositions, noting ambient temperature variations, and knowing the current humidity will allow the boiler set points to be maintained. ... (exhaust gas) temperature to the ...

PAT Testing London | Gas Appliance Testing | Gas and PAT

Why do I need boiler servicing? To test gas appliances are working safely and efficiently the manufacturers of gas appliances recommend an annual service. Boiler Servicing GasandPAT.com only use qualified Gas Engineers to carry out Boiler Servicing.

Thermal Power Plants: What is a negative DRAFT?

10/25/2017 · Negative draft is nothing but a negative pressure (pressure lower than outer atmospheric pressure )maintained in the boiler using induced draft fans. Otherwise if the boiler has positive pressure, flue gas may come out if there are any leaks in the boiler, which is …

Industrial boiler technology for beginners

Design of an industrial boiler At full capacity a boiler of this size converts 3 000 litres of fuel oil or a corresponding amount of natural gas to thermal or process heat every hour. This would be sufficient to heat more than 2 000 houses. Because of the huge volume of

How to Clean & Maintain Gas Furnaces

Nov 12, 2012 · Gas furnaces need to be cleaned and maintained in very particular ways to ensure their longevity. Clean and maintain gas furnace with help from a plumbing, heating and cooling specialist in this ...

Replacement Gas Boilers

Many older boilers have AFUE ratings of only 55-65%. If your boiler has not been well maintained, then its efficiency may be even lower. The current minimum AFUE for a new fossil-fueled hot water boiler is 80%, and the minimum rating for a gas-fired steam boiler is 75%. New high-efficiency boilers can have AFUE ratings of 90% or higher.

Why vacuum breaker is provided in condensing turbine exhaust

In modern Combined Cycle Power Stations, the exhaust gas from Gas Turbines, which contains significant amount of heat energy is diverted to water boilers to …

Maximizing Heating System Gains with Hybrid Boiler Plants

be returned to the boiler at or above 130-140F in order to prevent flue gas condensation from occurring. The dew point of exhaust gases is normally in the range of 135F. Hybrid plants can be utilized in legacy/existing plants or new designs. Depending on the condi …

Boiler Combustion Efficiency

This is optimised and maintained by measuring the output of oxygen level of the exhaust/flue gas by using an oxygen sensor in a closed loop feedback system to a controller for regulating the input mix. This is especially useful when the quality of fuel supplied may vary (i.e. gas from different sources).

Importance of Maintaining Your Boiler – American

Boilers may have connections that are not properly sealed, such as those that have not been maintained for a while. This can result in exhaust leakage, which contains carbon monoxide gas. This gas is odorless, colorless, and tasteless. It can also be fatal, which is why it is important to have your boiler inspected for gas leaks on a regular basis.