This section presents methods that can save fuel, reduce boiler operating costs, and increase boiler efficiency. In this regard, different heat losses are introduced and their amount is determined.
The efficiency of a typical boiler is about 75%. Of course, boilers with a new design have efficiencies between 90-80%
Usually, the maximum working pressure of this type of boilers is 25 bar and they have a capacity between 5 to 10 tons per hour.
Industrial boilers:
These boilers are known as industrial boilers and have high efficiency, very good quality, and good response speed.
These types of boilers are Bottom Supported has two separate drums of natural rotation type and are capable of producing steam with a maximum capacity of 450 tons per hour.
The burners of this type of boiler are in the front wall and in terms of the arrangement of thermal surfaces, the flow of smoke is evenly distributed on the surfaces.
The high quality of the desired standards and structures and their high efficiency make customers be satisfied.
Capacity and design conditions:
- Production steam tonnage: Maximum 450 tons per hour
- Maximum working pressure: 127 kg / cm2g
- Maximum steam temperature: 515 ºC
- Combustion Air Supply System: Force Draft Fan
- Fuel: gas, liquid (single or double burned)
Advantages and specifications of industrial boilers:
- High speed response of this boiler to load changes
- High reliability
- These boilers can be produced in the factory and then transported to the site.
It is worth mentioning that in cases where there are restrictions on road freight, this type of boiler can be transported in smaller sections, and installation and set-up operations can be performed on-site. The steam produced by this model of boiler can be superheated or saturated and depends on the customer’s opinion and request.
Integrated boilers:
This type of Bottom Supported boiler has two separate water and steam drums and a natural water and steam circulation system. Also, due to the many experiments and experiences that exist in the design and construction of this type of boiler, it is possible to design and manufacture them advanced.
Capacity and design conditions:
- Production steam tonnage: up to 250 tons per hour
- Maximum steam pressure: 120 kg / cm2g
- Maximum steam temperature: C480
- Combustion Air Supply System: Force Draft Fan
- Fuel: gaseous liquid (single or double burned)
Industrial – Power plant Boilers:
This boiler has both industrial and power consumption and has high efficiency and minimal heat loss. It operates with high pressure and temperature and is used in medium capacities in industries. This type of boiler is connected to its metal structure only from above (Top Support) and has a drum without reheater. Besides, these boilers are of the radiant type and have a rotation system. Capacity and design conditions:
- Production steam tonnage: maximum T / H 680
- Maximum steam pressure: 150 kg / cm2g
- Maximum steam temperature: C549
- Combustion Air Supply System: Force Draft Fan
- Fuel: gas, liquid (single or double burned)
This type of boiler is used to produce steam in thermal power plants. These boilers with a natural rotation system, single drum, and have several stages of superheater, reheater, and economizer.
