How to control the gas during the operation of the shaft seal electric heater

How to control the gas during the operation of the shaft seal electric heater

The main function of the shaft seal electric heater is to extract the mixed gas from the sealing system of the steam turbine, preventing gas leakage from the sealing end into the turbine room and oil system, thereby polluting the environment and damaging the quality of oil products. Gas substances enter the shaft seal electric heater and cool into water, heating the condensate, and the remaining uncondensed gas is discharged into the atmosphere.

If the resistance of drainage reflux is increased, the drainage of the shaft seal electric heater will return to the steam surface of the condenser at a certain height after passing through multiple water seals. The difference in flow resistance and height is exactly equal to the vacuum of the condenser, which is more normal at this time.

Using shaft sealed electric heater gas return steam method to heat condensate water, reducing heat loss; The shaft seal electric heater is in a slightly negative pressure state during operation, with a pressure of about -6kpa and a vacuum pressure difference of about 10m from the condenser. According to the working principle of multi-stage water seals, this multi-stage water seal must generate a resistance of more than 10m during operation to ensure smooth drainage and prevent air leakage.

The multi-stage water seal from the shaft seal electric heater to the condenser is a 4-stage water seal, with each stage water seal cylinder about 3 meters high. The structure of the multi-stage water seal is analyzed, and the function of the multi-stage water seal is to maintain the drainage water level of the shaft and protect the vacuum state. Once the water in the multi-stage water seal is filled, its water level remains basically unchanged.

Installation location and requirements for explosion-proof electric heaters

1, Installation location of explosion-proof electric heater

The installation location of explosion-proof electric heaters should not have accumulated water or dripping water, especially when installing equipment in mining faces with large water splashes. It is prohibited to randomly place debris unrelated to the safe operation and maintenance of explosion-proof equipment. The installation of equipment should be stable and reliable, comply with the installation requirements specified in the product manual, and there should be no tilting or vibration. After installation, the low-voltage switch should be flat and firm, and the inclination angle of the magnetic switch should not exceed 15 °

Sufficient distance should be left between explosion-proof electric heaters and equipment or between them and walls for easy maintenance. The installation position of the high-voltage explosion-proof switch for the explosion-proof electric heater must be flat. When connecting the cable to the switch, it must pass through the incoming device, which must be filled with insulation glue and sealed tightly.

2, The installation of explosion-proof electric heater equipment should meet the requirements of explosion-proof performance

1. All screws and spring washers of the explosion-proof electric heater must be fully tightened, and the gap between the explosion-proof joint surfaces should meet the regulations. The explosion-proof surface should not rust, and any rust should be treated.

2. The wiring process meets the standard requirements.

3. The locking device should be firm and reliable.

Www.superbheater.com