Grading type biomass roller dryer

Abstract

The invention relates to a grading type biomass roller dryer. The grading type biomass roller dryer comprises a base, a drying cylinder arranged on the base, a power device arranged on the base and aheat source, wherein the drying cylinder comprises an inner cylinder body and an outer cylinder body arranged on the inner cylinder body in a sleeving mode; one end of the inner cylinder body is embedded in the side wall of the outer cylinder body in a rolling mode, and the other end of the inner cylinder body extends out of the outer cylinder body; a discharging outlet is formed in the end of theside, extending out of the outer cylinder body, of the inner cylinder body; the power device drives the inner cylinder body to rotate; a first spiral plate is arranged on the outer side wall of the inner cylinder body, a second spiral plate is arranged on the inner side wall of the inner cylinder body, and the spiral direction of the first spiral plate is opposite to that of the second spiral plate; a feeding inlet is formed in the cylinder wall of the side, away from the discharging outlet, of the inner cylinder body, and a scraping hopper is arranged at the feeding inlet; a feeding inlet isformed in the side wall, close to the discharging outlet, of the outer cylinder body, and a feeding hopper is arranged at the feeding inlet; and an air outlet of the heat source extends into the inner cylinder body through the discharging outlet. According to the grading type biomass roller dryer, energy in high-temperature water vapor can be recycled multiple times while water vapor and dust impurities generated by drying biomass raw materials are removed, and thus the drying cost is reduced.

Description

technical field [0001] The invention belongs to the field of dryers, in particular to the field of graded biomass drum dryers. Background technique [0002] The drying of biomass raw materials is a key part of the industrial application of biomass. The drying state of raw materials directly affects the efficiency and income of subsequent processes; treatment; at present, large-scale drying boxes and tunnel drying already exist, such as using hot air to heat the inside of the drum while blowing away the humid air to achieve the purpose of drying; but there are many problems in the drying process, and the current circulation During the drying process of the biomass dryer, the biomass is dried at one time, which causes the moisture released from drying to not be dried immediately, which increases the moisture content in the dryer and reduces the drying rate; at the same time, due to the existing drying The length of the cylinder is very long, and the temperature requirement of...

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Problems solved by technology

[0002] The drying of biomass raw materials is a key part of the industrial application of biomass. The drying state of raw materials directly affects the efficiency and income of subsequent processes; treatment; at present, large-scale drying boxes and tunnel drying already exist, such as using hot air to heat the inside of the drum while blowing away the humid air to achieve the purpose of drying; but there are many problems in the drying process, and the current circulation During the drying process of the biomass dryer, the biomass is dried at one time, which causes the moisture released from drying to not be dried immediately, which increases the moisture content in the dryer and reduces the drying rate; at the same time, due to the existing drying The length of the cylinder is very long, and the temperature requirement of the heat source is also very high, otherwise the purpose of drying will not be achieved, but if the temperature is too high, it will easily lead to partial overheating of the dryer, carbonization of raw materials, and fire in serious cases; in addition, the space inside the cylinder is large , the amount of hot air required is large, and it is easy to cause the hot air to be empty, and the hot air generated by drying is often discharged, which wastes energy and leads to high energy consumption.

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