Temperature rise issue of the HT-L gasifier before startup?
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Before starting up, the HT-L gasification furnace is required to have a temperature of over 200°C and a pressure of 2.0 MPa. Should the temperature at the temperature measurement point in the furnace chamber be the same as that of the circulating water in the steam drum? If they are not the same, which one is lower or higher, and what causes this difference?
The furnace temperature is higher than that of the steam drum. Temperature is related to the heat transfer process, and it is necessary to control the heating curve to ensure that the temperature does not exceed the limit. . . . . . . .
The heating prior to ignition of the spacecraft furnace requires the use of water from the steam drum; this water is used to heat the slag layer in the gasification furnace. Why is there a difference between the temperature of the coil and the temperature of the furnace body?
Is the space furnace fed under pressure? Protect the burner.
If there is refractory insulating material on the inner side of the water wall of the gasifier, the temperature of the water wall remains lower than the temperature inside the furnace. After feeding materials, a slag layer forms over the insulating material layer, providing further insulation.
According to what you said, the temperature measured in the furnace chamber of the vaporizer should be lower than the water temperature in the coil, right?
The main difference between the temperature measurement points on the water wall and those on the refractory bricks is that the temperature readings from the water wall do not represent the actual temperature of the furnace wall; they are merely a reference value, which should be around 900 degrees. The temperature sensors are located inside the water wall, at roughly the same level as the refractory material. When slag adheres to the wall, the temperature probes get buried in the slag, and it is by observing these probes that it is possible to determine the condition of slag removal.