Oil Shale Semi-coke Fluidized Combustion Heat Pipe Circulating Gas Heating Furnace

Abstract

An oil shale semicoke fluidization burning heat pipe type circulation gas heating furnace comprises a fluidized bed burning furnace and a tail heat exchanger which are communicated. The lower end of a furnace chamber of the fluidized bed burning furnace is connected with an air distribution device. The furnace chamber is provided with a residual gas burner and a secondary air nozzle. A film type wall heat exchanger is arranged on the periphery of the furnace chamber. The air distribution device is provided with a primary air inlet. A high-low-temperature air preheating pipe type heater and a high-low-temperature gas heat pipe type heater are arranged in a tail smoke channel of the tail heat exchanger. A high-medium-temperature gas heat pipe type heater is arranged in a gas channel of the tail heat exchanger. A medium-temperature gas inlet, a gas nozzle and a hot gas outlet are formed in the gas channel. A cold air inlet, a smoke outlet and a hot air outlet are formed in the tail smoke channel. A cold gas main pipeline is connected with an inlet header of the film type wall heat exchanger and the gas nozzle. An outlet header of the film type wall heat exchanger is connected with the medium-temperature gas inlet. The hot air outlet of the tail pipe type heat exchanger is connected with the primary air inlet and the secondary air nozzle respectively.

Description

technical field [0001] The invention relates to a device for heating circulating gas in an oil shale gas heat carrier dry distillation process. The device can also be used for coal, waste tires and biomass. Background technique [0002] Oil shale is an important energy resource. The reserves of oil shale resources in the world are very huge, and its reserves are as high as (10~15)×10 18 kJ, accounting for about (26-43) × 10 of the total amount of various energy sources in the world 18 35% of kJ, which is higher than the known reserves of crude oil in the world (8×10 18 ~10×10 18 kJ). [0003] The development and utilization of oil shale currently mainly adopts the carbonization furnace-based process route for carbonization and refining. The existing carbonization furnace-based process route uses gas heat carrier as the main heat carrier: the heat cycle gas is used as the main heating carrier to add to the middle of the carbonization furnace The retort shale is heated, w...

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Problems solved by technology

[0009] The purpose of the present invention is to substantially improve the existing heating furnace that uses gas combustion to heat and circulate gas, and to combine oil shale semi-coke fluidized bed combustion with the furnace inner membrane wall heat exchanger and tail heat pipe heat exchanger Organically combined to form an oil shale semi-coke fluidized combustion heat pipe circulating gas heating furnace, which not only effectively solves the combustion problem of oil shale dry distillation semi-coke, but also realizes the heating problem of hot gas required by the gas heat carrier. It has a comprehensive High degree of utilization, low cost, scientific and reasonable, etc.

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