Immersion combustion gasifier can be identified from the name as a fuel heating type gasifier. This type of gasifier uses the flue gas from fuel combustion as the heat source for heating. The flue gas will contact with water for heating. At the same time, the water will be agitated violently. At this time, the hot water will exchange heat with the LNG in the pipe, which greatly improves the heat transfer efficiency.
The structure of the submerged combustion gasifier is relatively simple, mainly because the heat exchange tube bundle is immersed in the pool water, the lower part of the heat exchange tube bundle is welded with the LNG header, the upper part is welded with the NG header, and the LNG enters and exits from the bottom.
When the vaporizer is working, the proportion of fuel gas and air needs to be mixed according to a specific proportion, and then enter the burner for full combustion. At this time, the generated high-temperature flue gas will be distributed to the small holes on the pipe and sprayed into the pool water, and then the flue gas will enter into the pool water to form many bubbles, which will rise rapidly for heating and stirring, so that LNG in the heating tube bundle can be vaporized.
Immersion combustion gasification is characterized by low overall investment and installation cost of the equipment, small floor area and flexible operation, but there is also a disadvantage that the operating cost of the submerged combustion vaporizer is relatively high.
