Steam boiler inspection method

1. Steam boiler pressure gauge and water level gauge

Check if they are abnormal, whether the elbow, the connection of the connecting pipe and the opening and closing of the intermediate valve are abnormal. Whether the water level indicated by the water level meter is correct, whether the status of the drain valve of the water level column is correct, and whether the pressure gauge has a statutory inspection mark within the time limit.

2. Steam boiler safety valve, drain valve, discharge pipe

Check that they have been adjusted to the specified opening pressure and that the installation of the drain is reasonable. Check if the bleed tube is blocked and if there are any measures to prevent it.

3, sewage device

Check whether the opening and closing of the drain valve is flexible, and whether there is sufficient room for adjustment of the lining of the packing cover. Is there any abnormality in the drain line?

4. Main air valve, water supply shut-off valve and reverse stop

Check their opening and closing status for any abnormalities and whether the bonnet material has a margin.

5, air valve

After the hydrostatic test to the full water state, the furnace starts to vapor and must be kept open.

6, the pipeline

Check whether the connection, support, expansion joints, hydrophobicity and heat preservation of the gas water pipeline meet the requirements. After the metal is fouled, it will overheat, and the metal will appear to creep, deform, and bulge. In severe cases, overheating will occur. The scale layer is located between the metal wall surface and the heated medium-water vapor. Because the thermal conductivity of the scale layer is small, it has significant heat insulation effect, and the temperature of the metal wall surface is greatly increased after scaling. It is estimated that on the evaporation heating surface, the scale of the depositing scale often collapses and collapses. The heated shell (drum) that deposits scale often overheats the bulge, and the heated surface tube that deposits scale often overheats.

Tests have shown that for steam boilers with a working pressure of 1.4 MPa, fuel waste can be up to 8% due to the formation of 1 mm thick mixed scale. According to statistics, the traditionally used steam boiler boilers that are widely used at present are still cleaned and maintained according to the scale of the steam boiler. Even if the scale is 4 to 5 mm thick, the pipe is cleaned. In this scaling process, I do not know how many coals are wasted unconsciously, and steam boilers are also damaged to varying degrees. At present, people generally think that this is a normal steam boiler combustion method, which will greatly increase energy consumption. Lead to energy waste. 1.6 mm of scale can consume 15% more energy, and 9.6 mm of scale can consume 55% more energy.

Therefore, steam boiler descaling is an important measure to save energy. The Zhaoli constant water molecular processor has the special function of removing scale. In the process of boiling water, calcium, magnesium ions and acid ions react chemically, and the calcium carbonate and magnesium carbonate crystals formed form scale, and after Zhao Liheng The water treated by the water molecule processor produces calcium bicarbonate and magnesium bicarbonate. These two substances are relatively soft, do not accumulate on the container wall, and are easily carried away by water, thereby achieving the desired descaling effect. The use of Zhaoli Hengshui molecular processor will bring good economic benefits. High-pressure steam boilers or steam boilers containing austenitic steel materials. Coal-fired heat-conducting oil furnaces should not use sodium hydroxide as the main caustic detergent.