ENERGY SAVING SOLUTION IN THE BOILER SYSTEM

Other complex boiler and heat network systems in factories with valve systems, pipelines, and equipment, with the main task of producing and distributing steam to serve the needs of drying, household heat, pasteurization, ... have power generation in cogeneration plants.

To provide the best solution for the boiler, you need to understand the operation process of this system. This article Cetech will clarify for you about the boiler system

Operation process

The main task of the boiler system is to distribute steam through pipes, valves and auxiliary equipment to reach consumption locations and reduce the pressure of steam to the required pressure at a separate address. . After used steam flow and heat exchange will be converted into condensate and returned to the boiler to turn into steam.

Energy saving solution in boiler system

Accordingly, the solution here is to optimize the combustion process inside the furnace, optimize the heat exchange process inside the furnace and minimize the damage outside the environment, utilizing the excess heat of waste smoke.

Optimize the combustion process inside the combustion chamber

According to the studies, the fire losses in coal-fired boilers are about 20-30% of the energy consumed in the furnace. Accordingly, the carbon content in slag averages 15-35%. Therefore, optimizing the combustion process will help release more energy and save fuel.

The optimal process includes:

• Ensure proper moisture of coal: coal dust is often watered to keep heat and make the combustion process better. However, this will reduce the calorific value of coal, and the amount of char coal is not exhausted by the loss of heat for evaporation.
• Reducing the lowest air coefficient to the lowest: the excess air factor is the amount of air intake for the process of burning more than the necessary air for that fire operation. When this coefficient is high, it reduces the combustion chamber temperature, making combustion more difficult, increasing heat loss due to exhaust fumes. It is possible to check the excess air coefficient by measuring the concentration of Oxygen and Carbon in exhaust fumes. Solution: renovate burn and burn, renovate the coal page method and supply air according to the area in the furnace so that the contact between air and fuel is in the best state.
• Ensure the combustion chamber must be closed: cold air entering the combustion chamber will reduce the temperature in the combustion chamber, affecting the combustion process in the furnace, so maintaining the pressure inside the combustion chamber at 8-10mm H2O. Solution: Adjust the flow of fans and exhaust fans, install more inverters for fans and smoke fans to both save electricity for fans, and easily control fans.

Optimize the heat exchange process in the furnace

The heat exchange process in the boiler is sometimes not focused, so the energy saving way for the boiler needs to be done step by step.

• Water treatment in the furnace: remove the scale components in the water before being put into the furnace, can be removed by water treatment system using cation to heat exchange efficiency of the furnace is best.
• Maintaining a reasonable discharge schedule: the water supply into the furnace and the evaporation of steam and the content of dissolved material in the kiln are increasing, so that the residue on the walls of metal walls will become longer. It is recommended to flush the oven periodically and continuously, and at the same time, promptly add new water so that the concentration of the substances dissolved in the furnace water must not exceed the permitted level. However, when the furnace is discharged, there is also a loss of heat to heat the water, so it is recommended to have the most reasonable and optimal discharge schedule.
• Taking advantage of excess heat from exhaust fumes: There are many boilers that emit smoke from high-temperature furnaces because they have not fully utilized the heat generated from the combustion of the fuel. It is possible to take advantage of the heat from this smoke to heat the water before putting it in the oven, supply air in the oven, FO oil drying, etc. note that it does not cause the smoke temperature to drop below 120 degrees Celsius by the smoke temperature. The low will easily corrode smoke pipes, polluting the surroundings when the weather is cold and humid.

Reduce loss on steam distribution system

In order to reach the required location, it is inevitable that there is a loss of heat through the pipe wall to the outside environment, loss of steam through leaky joints, holes in the pipe due to abrasion or corrosion . Solution: Ensure insulation, insulation of both valves, connectors with special cover structures, deflated points should be sealed as soon as possible.

Optimizing performance of steam equipment (Terminal equipment)

The efficiency of steam-powered equipment also affects the overall performance of boilers and thermal networks. In order to improve this performance, proper cleaning is required, preventing caking, resulting in reduced performance.

Selecting steam traps (Steam trap) also plays an important role in reducing steam loss, enhancing the efficiency of steam equipment.

Installation and improvement of condensate water recovery system

Many factories do not have condensate recovery systems that waste energy, clean water, water treatment chemicals.

If the enterprise does not have a condensate treatment system, it should be installed because it saves a lot of energy for the boiler system.

If there is a condensate water recovery system: should insulate the recovered water pipes, the recovery water tank should also be insulated. The amount of water recovered will be fed into the common furnace with an additional amount of water. When the temperature of the feed water is increased by 6 degrees Celsius, we can increase the efficiency of the boiler and heat network system, thereby reducing fuel consumption significantly.

Hopefully with some energy saving solutions in the shared boiler system above will help you improve efficiency, save fuel consumption costs, reduce heat loss during operation, ... ..

If you have any questions, please contact us directly for the most complete consultation.