15tph SZL series coal-fired chain grate water tube steam boiler project for the chemical industry

15tph SZL series coal-fired chain grate water tube steam boiler project for the chemical industry ZOZEN Boiler successfully completed the production and shipment of SZL series coal-fired steam boilers within the agreed period with a...

2tph DZL series coal-fired chain grate steam boiler project for the food industry in Mongolia

2tph DZL series coal-fired chain grate steam boiler project for the food industry in Mongolia Through the Internet, We knew that ZOZEN Boiler was a strong industrial boiler manufacturer and supplier which had a good reputation on...

22 million kcal YLW series coal-fired chain grate thermal oil heater project for the clothing industry

22 million kcal YLW series coal-fired chain grate thermal oil heater project for the clothing industry The coal-fired thermal oil heater produced by ZOZEN Boiler was featured with convenient installation, high thermal efficiency and stable ...

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1. The air in the economizer and condenser has not drained yet when firing. The safety valves of economizer and condenser need to be turned on to exhaust steam. Return pipe valves also need to be turned on, enabling the steam in the economizer and condenser to return to softened water tank.

2. The outlet water temperature is so high that economizer and condenser will have vaporization phenomenon. The outlet water temperature of economizer and condenser need to be controlled.

3. The check valve of the inlet of economizer and condenser is not at normal conditions. The check valve needs to be repaired.
1. The bed temperature rises sharply.

2. Oxygen levels go down and sometimes drop to zero.

3. The electric current of primary air fan is less and wind pressure of air compartment is higher.

4. Negative pressure of furnace is increased while the electric current of induced draft fan is reduced.

5. The slag discharge is difficult or unsuccessful.

6. When appearing bed clinkering, the bed temperature and bed pressure will be uneven distributed and not at normal condition; the measuring point of part bed temperature rises or falls abnormally.

7. The indicator of bed pressure has a very small fluctuation.
1. The fire grate is damaged and needs to be replaced.

2. There are excessive gaps of fire grate, which need to be adjusted.

3. The proportion of coal powder is too high. The coal need to be screened.
The life of the heat medium oil for thermal fluid heater is related to the operating temperature, and the life is shorter when the operating temperature is high.

After half a year, the heat medium oil is used for sampling every 2-3 months. When the flash point of the heat medium oil changes by more than 20%, the acid value is less than 0.5 mgKOH/g, and the residual carbon is less than 1.5 wo/o, when the color of oil becomes dark, it indicates that it has failed and needed to be replaced.

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