Device and method for regulating temperature of coal gas at outlet of fluidized bed gasifier
A technology of fluidized bed gasification furnace and gas temperature, which is applied to the gasification of granular/powdered fuels, the manufacture of combustible gases, and the petroleum industry, etc. It can solve the problems of increased investment costs and increased difficulty in equipment manufacturing, and the method is simple easy effect
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Embodiment 1
[0020] In the middle of the high-temperature-resistant vertical pipe section 6, three nozzles 2 in the middle of the vertical pipe section are arranged at an angle of 120°, and at the top of the high-temperature-resistant vertical pipe section 6, a vertical pipe section top nozzle 3 is arranged. The included angle between the nozzle 2 in the middle of the straight pipe section and the tangent line to the outer wall of the high temperature resistant vertical pipe section 6 is 60°. The nozzle 3 on the top of the vertical pipe section is vertical to the top of the high temperature resistant vertical pipe section 6 .
[0021] (1) During the cold start-up process of the fluidized bed gasifier, feed nitrogen into the nozzle 2 in the middle of the vertical pipe section and the top nozzle 3 of the vertical pipe section to protect the nozzles from being burned and blocked.
[0022] (2) The normal operating conditions of the fluidized bed gasifier are temperature 1000°C and gas volume 3...
Embodiment 2
[0025] The head 5 on the top of the gasifier is provided with three head nozzles 1 uniformly distributed at an angle of 120°, and no nozzles are provided in other positions. The tangent angle between the head nozzle 1 and the outer wall of the gasifier head 5 is 70°.
[0026] (1) During the cold start-up process of the fluidized bed gasifier, carbon dioxide is injected into the head nozzle 1 to protect the nozzle from burning and clogging.
[0027] (2) The normal operating conditions of the fluidized bed gasifier are temperature 950°C and gas volume 39852Nm 3 / h, the gas composition is shown in Table 1. The gas temperature requirement for the subsequent process is 900°C. After the gasifier reaches normal operating conditions, a total of 1218kg / h of deoxygenated water and 12.2kg / h of atomized steam are fed into the head nozzle 1, and the gas temperature drops from 950°C to 900°C for subsequent processes.
[0028] (3) During the shutdown process of the fluidized bed gasifier,...
Embodiment 3
[0030] The top head 5 of the gasifier is equipped with three head nozzles 1 evenly distributed at an angle of 120°, and two nozzles 2 in the middle of the vertical pipe section are arranged symmetrically in the middle of the high-temperature-resistant vertical pipe section 6, and one nozzle 2 is installed in the high-temperature-resistant horizontal pipe section 7. High temperature resistant horizontal pipe nozzle 4. The angle between the head nozzle 1, the middle nozzle 2 of the vertical pipe section and the nozzle 4 of the horizontal pipe section and the outer wall of the gasifier head, the outer wall of the high-temperature-resistant vertical pipe section 6 and the outer wall of the high-temperature-resistant horizontal pipe section 7 is 45°.
[0031] (1) During the cold start-up process of the fluidized bed gasifier, water vapor is supplied to the head nozzle 1, the middle nozzle 2 of the vertical pipe section and the nozzle 4 of the horizontal pipe section to protect the n...
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