Equipment performance

1Provide***Optimized system energy-saving design solutions:1Condensate Recovery System Design Proposal, Reduces Gas Consumption2Electrical control system design solution, reduce energy consumption

2Equipped with imported brand burners, high degree of automation, automatically blowing according to controller instructions, electronic automatic ignition, automatic combustion, automatic proportional adjustment of fuel/air, with stable performance and good combustion effect. Also includes an extinguishing protection device to ensure safe operation.

3Computerized bathing boiler controller, all functions are magically stored on a smart chip, the boiler can be turned on with one button, operates automatically on a timed and temperature schedule, users can set the boiler's on/off time, and once set, there's no need for constant supervision, saving time and effort.

4The fire tube is fitted with flame-retardant baffles, which slow down the smoke exhaust speed, enhance heat exchange, and result in lower temperature smoke leaving the smoke chamber, reducing heat loss and saving fuel.

Boiler heat loss

1. The heat loss caused by flue gas emissions from gas boilers is primarily due to the volume of flue gas and the emission temperature. During the exhaust process, when the boiler is not in a sealed state, air flow carries away some heat, resulting in heat loss. Flue gas emissions account for the largest proportion of heat loss, approximately 4.5%-8.2%.

2. Heat loss due to incomplete fuel combustion, primarily caused by two factors: one is the presence of combustible gas components in the flue gas within the boiler, which is related to the furnace temperature, air coefficient, and the mixing flow of fuel and gas, thereby affecting the volatilization rate and content of the fuel. The other is the incomplete combustion of solid fuel, more influenced by the granular nature of the solid fuel. During combustion, if the temperature is not high and the gas flow is poor, the flying ash can easily form sediments. Too much sediment accumulation prevents the remaining fuel particles from being fully combusted, leading to the formation of carbon black and causing heat loss in solid fuel gas boilers. Factors such as fuel properties, moisture content, temperature, power load, and the air propulsion force within the boiler can easily lead to fuel heat loss.

3. Heat Dissipation Loss of Gas Boilers: The heat dissipated into the external air from the metal structures exposed to the atmosphere of the boiler unit, such as the furnace wall and flue, is referred to as heat dissipation loss. This loss is directly related to the surface area of the boiler unit, as well as the insulation and thermal insulation conditions.

4. Heat loss due to boiler ash sediment: During the combustion process of fuel in a gas boiler, as the internal temperature of the boiler continuously rises, the heat loss expelled outside the boiler is referred to as heat loss due to boiler ash sediment.

Combustion Equipment

During the development of boilers, the type of fuel greatly affects the furnace and combustion equipment. Therefore, not only is it required to develop various furnace types to accommodate the combustion characteristics of different fuels, but also to improve combustion efficiency to conserve energy. Furthermore, technological improvements in the furnace and combustion equipment necessitate minimizing pollutants (*oxides and nitrogen oxides) in the boiler exhaust.

Mechanized Grate

Early potshell boilers used fixed grates, primarily burning high-quality coal and wood, with coal addition and slag removal performed manually. The introduction of the straight tube boiler led to the adoption of mechanized grates, with chain grate being widely utilized. Under-grate air supply evolved from a non-segmented "common storage air" to segmented air supply. Initially, the combustion chamber was low and inefficient. Later, recognizing the role of combustion chamber volume and structure, the chamber was raised and equipped with arches and secondary air, thereby enhancing combustion efficiency.

Room heating stove

When the generator set's power exceeds 6 megawatts, the grate sizes of these layer-fired furnaces are too large and the structures too complex, making them difficult to arrange. Therefore, room-fired furnaces began to be used in the 1920s, which burn coal powder and oil. Coal is ground into powder by a coal mill and then injected into the furnace chamber for combustion by a burner, thereby no longer being limited by the combustion equipment's capacity. Since the early stages of World War II, almost all power station boilers have been equipped with room-fired furnaces.

Direct Current Burner

Early coal powder furnaces used U-shaped flames. The coal powder air stream emitted by the burner first descends and then turns to rise in the furnace chamber. Later, a swirl burner arranged on the front wall emerged, forming an L-shaped torch flame inside the furnace. As the boiler capacity increased, the number of swirl burners also rose, which could be arranged on both sides of the walls or on the front and rear walls. Around 1930, a straight-flow burner arranged at the four corners of the furnace emerged, mostly adopting a circular combustion method.

Fuel Boiler

Post-World War II, with oil prices low, many countries began widely using oil-fired boilers. The automation level of oil-fired boilers was easy to enhance. After oil prices increased in the 1970s, many countries reverted to utilizing coal resources. At this time, the capacity of power station boilers also grew larger, demanding that combustion equipment not only burn completely and ignite stably, but also operate reliably, perform well under low loads, and reduce pollutants in the exhaust.

In coal-fired (especially lignite-fired) power plant boilers, employing staged combustion or low-temperature combustion technology, such as delaying the mixture of coal powder and air or adding flue gas to the air to slow down combustion, or dispersing burners to control furnace temperature, not only suppresses the formation of nitrogen oxides but also reduces slagging. Boiling combustion, a type of low-temperature combustion, can not only burn solid fuels with very high combustible ash but also incorporate limestone into the boiling bed for desulfurization.

Gas Boiler

Boilers were once a symbol of the industrial age, but as time has passed, these relics of the old industrial era struggle to fully meet the needs of modern businesses. So, how should boiler companies, plagued by diseases, address this issue? Gas boilers can help you solve the problem!

Generally, common issues with boilers include being costly and environmentally unfriendly, posing high safety risks, requiring dedicated management due to their large footprint, and being麻烦 to operate with various safety permits needed. Using a gas hot water boiler can address all these issues. Firstly, regarding cost and environmental concerns, gas boilers utilize combustible gases with zero emissions. They also come with intelligent pressure control, eliminating risks like explosions or carbon monoxide poisoning. Due to advanced technology, these boilers have a small footprint, are easy to operate without the need for a specialist, and run automatically with just a button press. As they are not coal-fired, no safety permits are required.

Gas boiler maintenance involves its own set of procedures, not just the boiler itself but also the auxiliary equipment and accessories. The maintenance of a single gas boiler unit alone is a complex matter, as the boiler's structure is intricate. Only regular normal use and thorough post-maintenance can ensure a longer service life. Compared to more complex boiler types like circulating fluidized bed boilers and power plant boilers, the maintenance of gas hot water and steam boilers is relatively easier due to the simpler structure of the boiler itself, but it is still much more challenging than routine mechanical maintenance.

1. Cleanliness:

Open the burner door, remove the rear shell panel, and unscrew the boiler's rear cleaning port screws. Clean the gas pipeline with a wire brush. Clean the combustion chamber with a soft brush. Remove the residue from the boiler, screw the cleaning port screws back on, close the burner door, and check if the seal ring is intact.

2. Antifreeze

If the boiler is installed in an area with temperatures below 0°C, the following protective measures must be taken: If the boiler room is outdoors, lower the indoor temperature to 15°C or 18°C to keep the boiler running all day. If the room will be unoccupied for an extended period, empty the water from the boiler.

3. Cathodic Protection

Boiler components are made of various materials (such as cast iron, copper, aluminum, etc.). Cathodic protection measures must be taken to prevent electrochemical corrosion.

4. Wastewater Discharge

Bottom drain of gas boilers can prevent smoke condensation. Smoke condensation is caused by water content in the flue gas (diesel or natural gas) and low flue gas temperature. Burning 1kg of diesel produces 1.04kg of water. Some of this water is exhausted through the chimney, some is absorbed by the chimney walls, and the rest settles at the bottom of the chimney. The amount of water produced is influenced by factors such as flue gas temperature (efficiency reaches 91% with flue gas temperature at 170℃), the total surface area of the chimney, the material of the chimney, and the insulation of the chimney.

5. Burner Maintenance:

Maintenance of gas boilers and burners is best performed after the heating season, rather than at the beginning. This is because combustion byproducts can corrode the boiler and clean out accumulated carbon, so it's not advisable to allow byproducts to linger in the boiler for too long.

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