Pretreatment device for extracting cellulose and hemicellulose from crop straw to produce ethanol

Abstract

The invention relates to a pretreatment device for extracting cellulose and hemicellulose from crop straw to produce ethanol. The pretreatment device comprises a horizontal pretreatment tank (1), a steam generator (6), a feeding pump (9) and a mixer (91); the steam generator (6) and the feeding pump (9) are connected with the mixer (91) in parallel, and the mixer (91) is connected with the horizontal pretreatment tank (1). Compared with the prior art, the pretreatment device has the advantages that the structure is reasonable, and the pretreatment efficiency can be improved.

Description

technical field [0001] The invention relates to the field of crop pretreatment, in particular to a pretreatment device for extracting cellulose and hemicellulose from crop stalks to produce ethanol. Background technique [0002] With the increasingly serious problems of environmental pollution and energy shortage, the utilization of crop straw has been widely concerned by scientific researchers. It is well known that crop straw is only a household fuel for farmers, and the burning of straw not only has a low utilization rate but also causes pollution to the environment. Using crop stalks to produce ethanol can not only alleviate the problem of energy shortage, but also protect the environment, which is a way to kill two birds with one stone. At present, the pretreatment of crop straw mainly includes physical methods, chemical methods, physicochemical methods and biological methods. These methods involve pretreatment equipment. Using a scientific and reasonable equipment can...

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Problems solved by technology

[0004] Because the vertical pretreatment tank occupies less equipment, the vertical agitator is easy to manufacture, and it is not easy to cause problems such as sagging and deformation of the stirring shaft, so that the vertical pretreatment tank is generally used now, but the vertical pretreatment tank is very important for mixing and material homogeneity. There are limitations in chemical and other aspects, especially because the vertical pretreatment tank has to overcome gravity, as well as the looseness and free fall of solid materials, it is not easy to make the materials uniform up and down and inside and outside, resulting in poor pretreatment effect , and the site of sticking to the wall and sticking to the bottom is serious

[0005] There are also horizontal structures used as reactors or fermentation tanks in other fields, but there are few reports on the application of straw pretreatment equipment, because the horizontal pretreatment tank occupies a large area, the equipment is not easy to enlarge, and the stirring device is not easy to manufacture and It is easy to sag and deform, etc., and it is not economical to use

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