Fluidized bed boiler to save fuel?
Fluidized bed technology boiler can operate automatically and continuously like FO oil furnace: Automatically feed, automatically keep pressure, automatically pump water, ensure stable steam quality, operator Convenient operation without manual coal feeding and slag removal. The furnace is designed with high efficiency, with an economizer to ensure the temperature of the smoke is below 150°C. The boiler is equipped with two levels of dry and wet dust collection, so it does not pollute the environment because the smoke from the furnace and the coal storage house is sealed, and the ash and slag that comes out is collected.
How to save fuel when using a boiler?
Steam production by waste heat
The boilers – small capacity boilers designed in the past often have very high exhaust temperatures because people have not paid attention to the issue of fuel saving. The problem is to determine a way to make use of the heat in the exhaust smoke in a reasonable and economical way. Old boilers – boilers with flue gas temperatures up to 500 to 600°C the use of an air dryer is uneconomical due to the high requirements for construction materials, on the other hand, the installation of an air dryer The gas entering these devices will change the radiation characteristics of the combustion chamber, adversely affecting the heat transfer process. Therefore, one can consider ways to utilize heat as follows:
– Producing steam by installing a steam generator using exhaust smoke at the outlet of the combustion chamber.
– Install equipment to heat oil or Ethylene Glycol to other places of use.
– Install oil heating equipment to supply boilers – boilers.
However, in practice, because most technological processes require steam, the most commonly used method is a steam generator without a combustion chamber.
It is necessary to regularly check the insulation layer and make timely additions and repairs to reduce heat loss to the environment.
However, when insulation is required, care must be taken in determining the optimum thickness of the insulation, as absorption of moisture into the insulation reduces the desired insulation performance.
Heating the feed water for the boiler
Heating the boiler feed water – the boiler will reduce the amount of oxygen in the water, thereby reducing
be corroded. One of the following methods can be used:
– Reuse condensate.
– Set the boiler water heater – boiler.
Use other heat exchange processes.
Treatment of water supplied to the boiler (pot) with scale and dirt
If the boiler feed water regime is not done well, there are many impurities in the furnace water, which not only creates scale in the boiler that can explode the pipes but also makes the steam quality worse, causing scale formation. steam pipes, in turbine components and can cause serious problems. Therefore, before the water is supplied to the boiler, it is necessary to base on the permissible water quality standards to select the appropriate water treatment methods and strictly implement the water treatment measures. Water quality standards can be referred to (TLTK3).
Condensate recovery is also a possible way to save energy.
Condensate recovery will be an opportunity to optimize boiler-boiler operation and bring about The following
– Reduce the amount of additional water thus reducing the cost of boiler feed water treatment.
– Reduce the concentration of impurities in the furnace water, thereby reducing the amount of blowdown water and reducing the energy consumed for blowdown.
– Take advantage of the amount of condensate to raise the temperature of the feed water without additional energy, and at the same time reduce the amount of steam supplied to the deaerator.
– Capable of increasing capacity without additional power supply.
To consider the possibility of condensate recovery, it is necessary to conduct an investigation of all steam-using equipment in the plant to determine the current amount of condensate discharge and to consider all possibilities of equipment improvement to recover the condensate. clean condensate return.
Reduces losses due to dirt and deposits
In boilers – coal and oil fired boilers, soot clinging to the tubes will act as an insulation layer, hindering heat exchange, so soot should be removed on a regular basis. On the other hand, when scaling on the burning surfaces also increases the wall resistivity. An increase in flue gas temperature may be due to excessive soot or may be deposited on surfaces in contact with water. Table 2 shows the relationship between fuel loss and scale layer thickness.
Currently, to handle the scale layer, we have the following measures:
– Use ultrasound.
– Use permanent magnets.
– Use electromagnetic fields.
When carrying out the treatment of the scale layer, it brings a number of benefits as follows:
– Save from 2 to 4%, fuel money.
– Reduce investment costs in installation and operation of water softening systems.
– Increase the boiler tube life by 1.5 – 2 times. No need to spend money to destroy with acid.
Above are some methods to help save fuel when using boilers in production. Need advice on boiler installation, please contact KS Boiler for a free consultation.
KS – Boiler specializes in manufacturing, installing and maintaining industrial boilers:
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Hotline: 1900 055 595
Office address: No. 9A, Street 73, Tan Quy Dong Residential Area, Tan Phong Ward, District 7, HCM.