Heat-generating equipment determines the quality of the drying agent and the stability of the entire drying process. The section includes direct and indirect heating solutions, as well as burner systems selected for dryer capacity and product requirements.
Two principles for forming the drying agent solve different tasks. The choice depends on the product, temperature requirements and acceptable system cost.
With direct heating, the drying agent is formed directly by combustion products. This option provides high efficiency and is used where the drying technology permits this composition of the drying agent.
With indirect heating, combustion products do not contact the drying air stream. Heat is transferred through a heat exchanger, producing a clean drying agent at the outlet.
The summary values are taken from the prepared direct and indirect heating comparison table.
| Parameter | Direct heating | Indirect heating |
|---|---|---|
| Efficiency | до 95–98% | 85–90% |
| Drying agent | with combustion products | clean |
| Drying product application | feed, grade 2 | food, seed |
| Cost | lower | higher |
The burner, furnace block and heat-exchanger section are considered as one system. This makes it possible to match heat generation to the actual capacity and operating mode of a specific grain dryer.
Provide the dryer and product parameters. ECOGRAIN specialists can match the solution to the required operating mode.
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