explain why the temperature of boiler exhaust gases should be maintained above minimum value

Diesel Exhaust Gas

2020-1-22 · In addition to the physical properties, the exhaust system designer must know certain other exhaust gas parameters. These include exhaust gas temperature—which is of special importance for the design of catalytic aftertreatment devices, as catalyst performance is a function of temperature—and exhaust gas flow rate.

Boiler Combustion | CleanBoiler.org

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%.

Steam Boiler Questions and Answers

2019-12-18 · 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: Please tell me how air inlet temperature affects boiler efficiency. What are the benefits of air preheating? then you should recalculate the control valves KV-value (CV-value

What is the Most Efficient Temperature to Keep the …

If you set it too high, as is possible if you use the first method and put the heating on full with an idea to turning it off soon after, the risk is that the water which returns to the condensing boiler after having circulated through the radiators will be too high a temperature to recover enough heat from the boiler’s exhaust gases.

Condensing Boiler Fumes - South Gloucestershire

2017-7-11 · condensing mode the flue gases give up their ‘latent heat’ which is recovered by the heat exchanger within the boiler and used to preheat the return water. As a result the temperature of the gases leaving the flue of a condensing boiler is typically 50-60°C compared with 120-180°C in a current non-condensing boiler. At the same time an

Engine Exhaust Back Pressure - DieselNet

Boiler - Wikipedia

2020-3-11 · A boiler is a closed vessel in which fluid (generally water) is heated. The fluid does not necessarily boil.The heated or vaporized fluid exits the boiler for use in various processes or heating applications, including water heating, central heating, boiler …

Low Temperature Corrosion in Boiler and Its Prevention

Air Fuel Ratio Effect on Combustion Efficiency

Combustion efficiency is dependent upon using the right amount of air to consume the fuel. In fuel-fired process heating, the largest source of energy loss is through the exhaust stack, which is why managing air flow is essential to combustion efficiency. When fuel burns in the presence of oxygen it is converted to carbon dioxide, water and heat.

CHAPTER 6 : GAS SAMPLING SYSTEMS

2019-11-26 · exhaust gases from the vehicle being tested. 2.2.6 The sampling system must be gas-tight. The design of the variable-dilution sampling system and the material that go to make it up must be such that they do not affect the pollutant concentration in the diluted exhaust gases. Should