The main body of the single-stage gas generator consists of a furnace cover, water jacket, grate, chassis device, air inlet box and other components.

The furnace cover is welded from steel plates and lined with refractory and insulating castables. The inner ring plate material and outer ring plate material are welded and manufactured in accordance with the relevant specifications for pressure vessels, which can ensure the safety of the single-stage gas generator. The water jacket is connected to the steam collecting drum, forming a natural circulation system of softened water from top to bottom. The softened water first enters the steam collecting drum, and then descends from the steam collecting drum into the water jacket. After being heated, a steam-water mixture is generated. From the riser to the steam collecting drum, the steam is separated by the steam-water separation device and used as a gasification agent. For the water in the water jacket, the use of tap water for a short period of time can only be allowed when the supply of softened water is stopped to temporarily maintain production.

The undercarriage consists of a worm gear or ratchet and an ash pan. The worm gear or ratchet and the grate are fixed on the ash tray to ensure uniform air distribution at the bottom of the furnace; and the ash removal on both sides can effectively avoid the partial furnace during the operation of the single-stage gas generator and reduce the blast resistance, thus reducing the carry-over, which is beneficial to the purification of gas. A rolling bearing is installed under the ash pan. When the ash pan rotates, the grate rotates at the same time. The ash falls into the ash pan. The small ash knife crushes the ash and the large ash knife discharges the ash pan. The middle air inlet box and the lower water sealing ring of the ash pan form a water seal.
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