Grain dryer quality appraisal

grain dryer, also known as hot air drying box, refers to agricultural machinery and equipment that uses a rotary heating device that can generate a large amount of hot air in a short period of time. It can kill insect eggs and solve grain drying problems through high-temperature treatment. With the improvement of grain varieties and the increase in unit yields, grain dryers are increasingly used.
Grain drying is an important step in processing grains. It is crucial to choose a grain dryer with high quality, long service life, economical and practical, good reliability and high degree of automation.
In the case of grain dryer quality appraisal, Zhongke Testing can provide grain dryer quality appraisal services.

can be divided into cross-flow dryers, mixed-flow dryers, co-flow dryers, forward and counter-flow, mixed-counterflow and forward-mixed flow dryers;
can be divided into batch operation grain dryers, continuous operation grain dryers and circulating operation grain dryers according to working methods;
can be divided into normal temperature ventilation dryers and heated air flow dryers according to the principle.

GBT 16714-2007 Continuous grain dryer
GB/T 6970-2007 Grain dryer test method
GB/T 26550-2011 Test and evaluation of year-on-year thermal efficiency of grain dryer
GB/T 21399-2008 Evaluation rules for automatic control systems of grain dryers
GB/T 21162-2007 Conversion rules for unit heat consumption and processing capacity of downstream grain dryers
GB/T 30467-2013 Conversion rules for unit heat consumption and processing capacity of cross-flow grain dryers
JB/T 13628-2020 Circulating grain dryer
LS/T 3516-1988 Grain dryer technical conditions

A cooperative of the plaintiff signed a purchase and sale contract for mechanical products with a machinery company of the defendant. The plaintiff purchased a dryer and ancillary equipment from the defendant. When using the grain dryer produced by the defendant, the plaintiff discovered that the dried grain was unevenly dry and wet and had the phenomenon of smearing. The defendant sent people to the plaintiff's place to repair the machine, but it still could not meet the usage standards. After negotiation with the defendant, the lawsuit was brought to court.
was entrusted by the court to conduct an appraisal and analysis on "whether there are quality problems" with the grain dryer involved in the case.
identification analysis results:
identification analysis expert group discussed the relevant information and on-site investigation of the grain dryer involved and conducted a comprehensive quality and technical analysis, and made the following suggestions and conclusions:
based on GB/T 16714-2007 stipulates that "drying uniformity shall not be greater than 2%, and the actual measurement is 7.62", which does not meet the requirements of the standard; the design drying capacity of the object to be identified is 100t%/h, and the actual measurement is 112.17t%/h, which meets the design requirements.