One Question per Day: Methanol Technology Exchange Edition 20180713
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Brief description of the characteristics of the burner in the gasification furnace of space furnaces: The burner of the HT-L gasification furnace is manufactured by the 11th Aerospace Research Institute; it is similar to the German GSP gasification burners, with only a slight change in the direction in which the coal powder is injected. 1. An integrated pilot burner, start-up burner, and coal burner is adopted. 2. The pilot burner is located at the center, using natural gas at 0.2 MPa. 3. The burner for starting up uses natural gas at 1.7 MPa from the outlet of the natural gas compressor. After the furnace pressure is raised to 1.0 MPa, coal is fed into the furnace simultaneously through the three coal powder pipelines (there is only one oxygen pipeline, and the oxygen-to-coal ratio is controlled based on the total amount). After coal feeding begins, the pilot burner is removed. The HT-L gasifier uses a top-firing design; as long as the pressure difference at the burner is maintained, the burner will not get damaged. As per the design requirements, the nozzles inside the furnace need to be inspected every 6 months. That is, every 6 months, the space furnace needs to be shut down for maintenance of the nozzles. The water wall is of the coiled type; the circulating water distribution tubes lead out four DN40 water pipes in a relatively even manner. These four pipes surround each other in parallel to form the water wall, with studs and fins between the pipes, upon which refractory material is attached. There are eight temperature measurement points in total in the furnace, with the temperature sensors embedded in the surface of the refractory material. The temperature should not exceed 1000 degrees; if it does, it indicates poor slag attachment or overheating of the furnace. If the temperature is too high, it will eventually damage the water wall. A quenching process is used at the lower part of the furnace body to serve the purpose of washing and cooling.
Features of the gasification furnace burner in space-related furnaces: The burner of the HT-L gasification furnace is manufactured by the 11th Aerospace Research Institute; it is similar to the German GSP gasification burners, with only a slight change in the direction in which the coal powder is injected. 1. An integrated pilot burner, start-up burner, and coal burner is adopted. 2. The pilot burner is located at the center, using natural gas at 0.2 MPa. 3. The burner for starting up uses natural gas at 1.7 MPa from the outlet of the natural gas compressor. After the furnace pressure is raised to 1.0 MPa, coal is fed into the furnace simultaneously through the three coal powder pipelines (there is only one oxygen pipeline, and the oxygen-to-coal ratio is controlled based on the total amount). After coal feeding begins, the pilot burner is removed. The HT-L gasifier uses a top-firing design; as long as the pressure difference at the burner is maintained, the burner will not get damaged. As per the design requirements, the nozzles inside the furnace need to be inspected every 6 months. That is, every 6 months, the space furnace needs to be shut down for maintenance of the nozzles. The water wall is of the coiled type; the circulating water distribution tubes lead out four DN40 water pipes in a relatively even manner. These four pipes surround each other in parallel to form the water wall, with studs and fins between the pipes, upon which refractory material is attached. There are eight temperature measurement points in total in the furnace, with the temperature sensors embedded in the surface of the refractory material. The temperature should not exceed 1000 degrees; if it does, it indicates poor slag attachment or overheating of the furnace. If the temperature is too high, it will eventually damage the water wall. A quenching process is used at the lower part of the furnace body to serve the purpose of washing and cooling.