NECESSITY 

After the boiler has been running for a long time, it is inevitable that there will be scale and rust problems. The appearance of these problems, due to the generation of scale, makes the heat transfer worse, and the boiler efficiency is reduced. Therefore, it is difficult to reach the rated evaporation capacity; and due to the deterioration of heat transfer, the metal is overheated. Under the action of the boiler pressure, the furnace tube bulges or even explodes; the heat transfer is deteriorated, which increases fuel consumption and operating costs. The boiler life is shortened. Therefore, after the boiler fouls, necessary methods should be taken to remove the fouling .

METHOD

Boiler cleaning is divided into mechanical cleaning and chemical cleaning, mechanical cleaning is manual, high-pressure water gun cleaning! Chemical cleaning is acid cleaning. You must find a qualified manufacturer or an environmental protection unit with a qualification certificate.

In order to make the boiler system operate in the optimal state, it is necessary to carry out special chemical treatment on the water system of the boiler system: remove scale, rust and anti-corrosion treatment:

1. Chemical cleaning: adding chemical cleaning agent to clean and disperse the floating rust, dirt and oil in the system, and restore it to a clean metal surface;

2. Daily maintenance: add GR-943C boiler scale inhibitor to avoid metal rust and prevent calcium and magnesium ion crystal precipitation.

Boiler cleaning is divided into two parts, one part is the cleaning of boiler convection tube, superheater tube, air heater, water wall tube scale and rust, that is, water quality treatment of boiler water

The high-pressure water jet cleaning technology uses water as the medium and uses a special equipment system to generate multiple, multi-angle, high-pressure water jets with different strengths. Thoroughly cut, crush, squeeze and flush the internal scales, blockages or surface attachments of the cleaning object to achieve the purpose of complete cleaning. No matter what scale deposit, such as rust, iron oxide scale, resin, chemical residue, paint or epoxy resin, it can be completely removed by high-pressure water jet cleaning equipment to show its metallic color. No chemicals, fluxes or corrosives are needed, and it is safe to use and environmentally friendly.

Blockage of the heating surface of the boiler air preheater, water wall, superheater, economizer, etc. will cause the exhaust gas temperature to rise, the boiler efficiency will decrease, and the induced draft fan power consumption will increase; serious blockage will cause the fan to fail to pull the negative pressure and the furnace oxygen Not enough, the boiler was forced to shut down. Using high-pressure water jet technology, the cleaning effect is very obvious.

The equipment is composed of high-pressure water pump, water inlet hose, high-pressure gun barrel, special nozzle, etc.

Cleaning process: After the tap water is pressurized to 50-100Mpa by the high-pressure pump, it is sent to the actuator on the working surface through the pipeline system. The high-pressure water is ejected from the nozzle to form a very thin and powerful high-pressure water jet. The outlet speed can be as high as 380m/s, which can wash away the scale on the heating surface.

The cleaning technology has the characteristics of high cleaning water pressure, convenient adjustment, no corrosion to the equipment being cleaned, no pollution to the environment, and obvious effects. It is an effective, time-saving, labor-saving and cost-saving method, and it is especially suitable for solving air pre-heating. Problems such as blockage of the heater and serious coking and slagging on the heating surface of the furnace. Generally, the exhaust gas temperature can be reduced by 4 to 12 degrees, the main and reheat steam temperature can be increased by 0.5 to 5 degrees, the power consumption of the induced draft fan can be reduced, and hidden dangers such as creeping expansion and corrosion under scale can be found early, which is very important for the safe and economic operation of the unit help.