How much is a babjehec professional natural gas boiler?
Cleaning of Gas Boilers
Boilers, after prolonged operation, inevitably develop scale and corrosion issues. The primary cause of scale formation in boilers is the presence of hardness components in the feed water. As the water is continuously evaporated and concentrated at high temperatures and pressures, a series of physical and chemical reactions occur inside the boiler, ultimately forming hard, dense scale on the heat transfer surfaces. This reduces the heat exchange efficiency and, due to under-scale corrosion, can lead to a decrease in the boiler's water-cooled wall heat absorption, an increase in the outlet temperature of the boiler furnace, and an increase in boiler losses. Additionally, scaling within the water-cooled walls can reduce heat transfer efficiency, potentially causing the wall temperature to rise and leading to pipe bursts in the water-cooled walls, affecting the safe operation of the boiler. Scale is the "root of all evils" in boilers and is a major cause of boiler accidents. Its危害性 primarily manifests as a waste of a large amount of fuel. Since the thermal conductivity of scale is only a fraction of that of steel, when scale forms on the heat transfer surfaces, heat transfer is impeded. To maintain a certain output of the boiler, the fire side temperature must be increased, leading to heat loss through radiation and exhaust gas. Now, high-efficiency, environmentally friendly, and non-corrosive cleaning agents can be used to clean gas boilers, revealing the original color of the metal in the tubes and reducing the impact of scaling and biological algae sludge. Additionally, it has a剥离 effect on iron oxide and sub-oxide, which can extend the service life of gas boilers, reduce energy consumption, and improve productivity. [2]
Maintenance of Gas Boilers
1. During operation, pay attention to the following points for gas boilers: (1) Gas boilers are not allowed to burn at positive pressure or have smoke emissions from the furnace chamber, as this may easily damage the cover over the coal feeding opening; (2) No water should accumulate on the horizontal surface at the bottom of the gas boiler to prevent dampness and corrosion.
2. The gas boiler should be inspected once every 2-3 weeks during operation.
3. The gas boiler should be shut down and undergo a comprehensive inspection and maintenance every 3-6 months of operation: (1) Inspect the interior and exterior of the gas boiler, including the welds of the pressure parts and the presence of corrosion on the inside and outside of the steel plates. If severe defects are found, they should be repaired immediately. If the defects are not severe, they can be repaired during the next shutdown. If any suspicious areas are found that do not affect safe production, a record should be made for future reference; (2) After the inspection, apply boiler bottom paint to the waterline to prevent corrosion.
4. Gas boilers and boiler bases should be painted at least once a year.
5. Maintenance Methods for Gas Boilers Not Used for Extended Periods: There are two methods, dry and wet. For boilers not used for more than a month, dry maintenance should be employed. For those not used for less than a month, wet maintenance can be used.
(1) Dry Maintenance Method: After the boiler is shut down, drain the boiler water, thoroughly clean the internal dirt, rinse it clean, and dry it with low heat inside the furnace (be cautious not to use high heat). Then, place blocks of unslaked lime with a diameter of 10-30 mm in separate trays inside the drum, ensuring they do not touch the metal. The weight of the unslaked lime should be calculated at 8 kg per cubic meter of drum volume. Close all manholes, handholes, and pipeline valves, and inspect them every three months. If the unslaked lime breaks down into a crumbly state, it should be replaced immediately. When the boiler is restarted, remove the unslaked lime and trays.
(2) Wet Storage Method: After the boiler is shut down, drain the boiler water, thoroughly clean the internal dirt, flush it clean, and then refill it with treated water to the full. Heat the boiler water to 100°C to expel gases from the water, then close all valves. This method should not be used in cold climates to prevent the boiler water from freezing and damaging the boiler.
