External fire down-flow fixed bed type front-furnace carbonization-coupling fire coal power generating device for straws

Abstract

The invention discloses an external fire down-flow fixed bed type front-furnace carbonization-coupling fire coal power generating device for straws. The device comprises a conveying machine, a feedingmachine, an air lock, a main material bin, a carbonization chamber, an air distribution chamber, a slag discharging chamber, an air collector, a heat exchanger, a four-way valve, a first circulatingfan, a combustor, a combustion chamber, an ignition combustor, a temperature adjusting chamber, a second circulating fan, a fan, a fourth circulating fan and a monitoring unit, wherein the conveying machine is connected with the air lock through the feeding machine; the air lock is connected with the slag discharging chamber through the carbonization chamber; the carbonization chamber is connectedwith the heat exchanger; the heat exchanger is connected with a four-way valve; a first outlet of the four-way valve is connected with the combustor through a first circulating fan; the fan is connected with the combustor; the combustor is connected with the combustion chamber; the combustion chamber is connected with the temperature adjusting chamber; an outlet of the temperature adjusting chamber is connected with the carbonization chamber; a second outlet of the four-way valve is connected with the temperature adjusting chamber through the second circulating fan; a third outlet of the four-way valve is connected with the third circulating fan; the circulating fan is connected with a power station boiler; and the monitoring unit is used for monitoring the temperatures of the outlets ofthe combustion chamber and the temperate adjusting chamber. According to the device, the scorification and corrosion problems are solved.

Description

technical field [0001] The invention belongs to the field of utilization of agricultural and forestry waste straws, in particular to a carbonization coupled coal-fired power generation device in front of a fixed-bed furnace with external combustion of straws. Background technique [0002] China is a large agricultural country. The total amount of crop straws that can be collected annually is about 680 million tons, and its calorific value is equivalent to 330 million tons of standard coal, accounting for 7.6% of the country's total energy consumption in 2016. In this context, the extensive utilization of straw is no longer suitable for my country's energy structure and environmental requirements, and straw must be used for high-value utilization such as resource utilization and energy utilization. The energy utilization of straw is mainly divided into two main forms of utilization: fermentation to prepare biogas and combustion for power generation. The form of biogas utiliza...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a carbonization coupled coal-fired power generation device in front of the fixed-bed furnace with external combustion of straw, so as to achieve the coupling of coal-fired power generation for straw carbonization gas production and co-production of straw biochar at the same time, and solve the problem of K in the process of coupling power generation. , Na, Cl and other inorganic elements caused by slagging and corrosion problems

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