Biomass abnormal circulating fluidized bed gasifier

Abstract

The invention provides a biomass abnormal circulating fluidized bed gasifier which consists of a fluidized bed, a gas distributor, an ash discharge tube, a gas inlet tube, a feed inlet, a first-level gas-solid separator, a cinder circulating return tube, a return feeder, a second-level gas-solid separator, a silicon-potassium fertilizer outlet and a gas outlet. The fluidized bed consists of a turbulent fluidized bed and an entrained bed reactor. The gas distributor and the ash discharge tube are arranged at the bottom of the turbulent fluidized bed. A biomass feed inlet is arranged in a position which is 100-2000mm far from the bottom of the entrained bed reactor, and the first-level and second-level gas-liquid separators are arranged at the top. Coarse particle ash of the first-level gas-liquid separator enters into the circulating return tube and is connected with the turbulent fluidized bed at the bottom of the abnormal circulating fluidized bed through the returner. High-temperature refine ash of the second-level gas-liquid separator is fed outwards as the silicon-potassium fertilizer from the silicon-potassium fertilizer outlet, and gas is fed outwards as a product gas from the gas outlet.

Description

1. Technical field [0001] The invention provides a biomass special-shaped circulating fluidized bed gasifier, which belongs to the field of biomass energy equipment. 2. Background technology [0002] China has a huge amount of solid biomass available, mainly agricultural waste and wood waste. The distribution of biomass is scattered, and it is difficult to collect and transport. Under the current conditions in China, it is difficult to adopt large-scale combustion technology. Biomass gasification technology is a new technology that uses biomass as energy in the 20th century. [0003] Biomass (mainly crop straw) gasification is a technology of thermochemical conversion of biomass. Its basic principle is to heat the biomass raw material under incomplete combustion conditions to make the organic hydrocarbon chains with higher molecular weight Cleavage to lower molecular weight CO, H 2 、CH 4 Combustible gas is a common way to convert biomass energy. Biomass gasification has...

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Problems solved by technology

The equipment structure of fixed bed gasification technology is simple, the operating cost is low, and the biomass conversion rate is as high as 98%, but the tar is more difficult to handle, so it is suitable for small-scale gasification; fluidized bed gasification technology can be used for large and medium-sized Large-scale gasification, the opera...

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