Tapioca starch clean production method

Abstract

The invention discloses a tapioca starch clean production method comprising the processes of cassava raw material preparing, mud-removing machine mud removing, drum dry impurity removing, cassava bath tank cleaning, disintegrator crushing, rasping machine pulping, sand remover sand removing, horizontal centrifugal sieve sieving, multi-stage cyclone concentration refining extracting, scraper centrifuge dehydration, air flow drying, and finished product packaging. A two-stage dry method is used for removing mud and peels, such that cleaning water is saved, and the burden on subsequent processes is reduced. The cleaning method is changed from a former leaching method into a tank soaking washing method, such that the method is adapted to impurity-removal treatment, and cleaning water is saved. Water discharged from various processes is stored in different tanks, and is recycled, such that water resource recycling is realized. In summary, with the method, an existing treatment mode is changed. Through clean production means such as source control and process emission reduction, resource utilization rate is improved, and pollutant production amount is minimized. The content of clean production is truly embodied, and a win-win solution for industrial economy and the environment is finally realized.

Description

technical field [0001] The invention belongs to the technical field of cassava starch production, in particular to a clean production method of cassava starch. Background technique [0002] Cassava starch processing enterprises have always been large consumers of water resources, and the waste of water resources is serious. This has brought double pressure on technology and economics to the environmental protection of starch production enterprises. Many small enterprises have been forced to close down or merge and change ownership. Most starch processing enterprises mainly adopt the traditional production process: drum wet impurity removal → secondary hammer crusher crushing and dissociation (the dissociation effect can only reach 90% generally) → vertical centrifugal sieve screening → sand removal → disc Separation → dehydration → air drying → packaging of finished products by chip separator. The brief description is that fresh cassava is transported into the drum. The cass...

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Problems solved by technology

[0005] 2) Large consumption of fresh water

[0006] On the one hand, due to the very weak awareness of water resource recycling, the recycling of process water is not considered at all in the process of product process route design; on the other hand, the overall equipment level in the industry is backward and the technical reserves are insufficient. and quality, had to use clean water to rinse repeatedly, resulting in a serious waste of clean water, wastewater discharge per ton of cassava starch products (about 20 ~ 25m 3 ) remain high

[0007] 3) The process equipment is backward and the starch extraction rate is low

[0008] At present, the domestic starch production industry generally has low automation level in key processing links such as crushing, separation, disk machine refining, and drying, and the treatment effect is not ideal. Large labor investment, high equipment failure rate, serious problems such as leaking, dripping, and leaking

The situation that it is difficult to increase the production level due to backward equipment must be changed as soon as possible

[0009] 4) Washing cassava water and sieving and refining process discharge water are not properly treated separately, and are not treated differently for recycling, resulting in waste of water resources; the water content of cassava residue in traditional processes is relatively large, generally 85% to 92%. Direct discharge increases the degree of environmental pollution

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