Coaxial different-speed combined paddle reactor

Abstract

The invention relates to a coaxial different-speed combined paddle reactor which is used in synchronous saccharifying fermentation of biomass-based ethanol production. The reactor comprises a cylindrical vertical vessel and a stirring device axially installed in the vessel, wherein the comprises a helical ribbon type stirring paddle helically arranged around a stirring shaft from top to bottom, a lower layer stirring paddle installed on the stirring shaft near the lower part of the cylindrical vertical vessel, and a bottom stirring paddle installed at the bottom end of the stirring shaft at the bottom of the cylindrical vertical vessel. According to the invention, a three-blade combination mode is adopted, so that the effects of shearing and circulating materials are achieved; under the combined action of the above two flows, the materials added into the reactor can be quickly mixed, so that the energy consumption distribution in a stirring tank is more uniform, thereby realizing efficient utilization of energy; the reactor can solve the problem of wall sticking of the materials near the wall surface; the reactor reinforces heat transfer, promote uniform suspension of granules and is simple in structure; the structure and operation parameters can be easily adjusted; and the reactor is convenient to process, manufacture and install.

Description

technical field [0001] The invention relates to a biomass reactor, in particular to a coaxial variable speed combined paddle reactor. Background technique [0002] With the rapid development of modern industry, the demand for energy has increased sharply. Most of the energy consumed by countries in the world today comes from fossil resources. Fossil energy not only has limited reserves, but also causes a large amount of NO x , SO 2 and other harmful gases and CO 2 , methane and other greenhouse gas emissions, so the development of environmentally friendly renewable resources is becoming increasingly important. As one of the most promising renewable energy sources, fuel ethanol has attracted more and more attention from various countries. [0003] At present, the production of fuel ethanol mainly uses sugar crops (Brazil) and corn (USA) as raw materials. Their output is limited by food resources, and the cost of raw materials is as high as 40% of the total cost. It is dif...

AI Technical Summary

Problems solved by technology

At the same time, due to the adhesiveness of the biomass system, a relatively large amount of material will adhere to the reactor wall and paddles under a certain amount of material in the reactor, which cannot be mixed effectively.

Since the stirring paddle of this equipment does not have the function of scraping the wall, the material adhering to the wall of the reactor cannot be removed in time, resulting in a decrease in the heat transfer performance of the reactor

In addition, steel balls or similar devices added to the cylinder to enhance the mixing effect obviously increase the complexity of the equipment and the difficulty of equipment processing, which is not conducive to industrial scale-up, and the rolling mixer is noisy when it is running, the mixing time is long, and the energy consumption is high.

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