Analyze the reasons for foaming at the bottom of the single-stage gas generator.
The reasons for foaming at the furnace bottom of a single-stage gas generator are exactly opposite to the reasons for foaming at the furnace surface. Foaming at the furnace surface is caused by the air reaching the furnace surface in different situations. Foaming at the furnace bottom is caused by the hot gas pouring ash to the furnace bottom and mixing with the gasification agent at the furnace bottom, causing foaming. Therefore, there is one upward air and one downward gas. The two travel in different media and in different directions.
The gate valve or regulating butterfly valve of the air main pipe or air branch pipe is suddenly closed to a large extent, resulting in low pressure in the air main pipe or branch pipe. The pressure of the furnace gas is greater than the pressure at the furnace bottom, causing the gas to flow back. During the gas flow back, it passes through the hot recovery layer and gasification layer, causing it to further heat up. When the hot gas reaches the bottom of the furnace, it mixes with air and causes bubbling at the bottom of the gas generator. At this time, the water seal at the bottom of the furnace will be washed away, and gas leakage from the furnace bottom will occur. This situation occurs in a cold gas system composed of multiple generators. This situation will not occur in a 1-to-1 situation (that is, one fan, one furnace, and one exhaust conveyor are running).
During a power outage, the remaining gas flows back, causing bubbling at the bottom of the single-stage gas generator. In a hot gas station, the gas generally flows back due to the blast, so there will be no bubbling at the furnace bottom. deal withSingle stage gas generatorThe method of foaming at the bottom of the furnace is to quickly inject a large amount of steam into the bottom of the furnace. On the one hand, it forms a positive pressure at the bottom of the furnace, and on the other hand, the steam adds air to the gas, which can prevent the bottom of the gas generator from foaming again.