Multi-stage cutting drainage air distribution device, drying chamber and dryer

Abstract

The invention discloses a multi-stage cutting drainage air distribution device. The multi-stage cutting drainage air distribution device comprises a flow guide air hopper, an air distribution plate and an air uniformizing plate. The flow guide air hopper is composed of a plurality of arc-shaped air cutting guide plates with different radians. A first-stage air guide plate cutter opening of each arc-shaped air cutting guide plate is located in one side of an air inlet. The air distribution plate is composed of a plurality of movable air cutting guide plates. A second-stage air guide plate cutter opening of each movable air cutting guide plate faces the side where an air outlet of the flow guide air hopper is located, and the structure of each movable air cutting guide plate can guide the air direction to be the vertical direction. The air uniformizing plate is a plate with a plurality of boxes and is arranged perpendicularly below or above an air outlet of the air distribution plate. The invention further discloses a drying chamber comprising the multi-stage cutting drainage air distribution device and a dryer.

Description

technical field [0001] The invention relates to the field of drying machinery and equipment, in particular to a direct-fired chain plate bed hot air tunnel drying chamber and a drying machine. Background technique [0002] The chain plate hot air tunnel dryer is a common through-flow dryer. The hot air used as the drying medium is usually produced by the air heated by the preheater. According to the heating method, it can be divided into two categories: one is the indirect heat exchange method, that is, the air is heated by steam or heated heat transfer oil through the partition heat exchanger; the other is the direct heating method, that is, flammable gas, liquid, etc. Or the high-temperature flue gas produced by solid combustion is directly used as a drying medium, and commonly used equipment such as a hot blast stove. The hot blast stove method of direct heating solves the loss of multiple transfers of heat energy and improves the efficiency of heat energy use. [0003]...

AI Technical Summary

Problems solved by technology

The form of uniform opening is to form a damping effect in the air chamber with a large air volume and air pressure to avoid the segregation of hot air to achieve the effect of uniform air distribution. Its essence is to rely on a large air volume to achieve uniform distribution of hot air. High circulation fans are used to stabilize the air volume and pressure of the air chamber, resulting in a large waste of kinetic energy. At the same time, there are disadvantages such as small operation adjustable capacity, and small adaptability to different drying varieties and different dry humidity, especially for heat sensitivity. It is difficult to adjust the drying of materials, and it is not suitable for drying light materials; from the perspective of equipment, the air chamber with large air volume and pressure also needs to strengthen the structural strength of the air plate

In order to overcome the above weaknesses, on the basis of the uniform hole opening air distribution device, a variable opening ratio punching plate is developed, which reduces the running resistance, reduces the air volume and pressure, and reduces the energy consumption of the fan. However, this structure is still It is the principle of using the air chamber composed of perforated plates or hole caps to form a damping effect to avoid hot air segregation; the design of the inclined air distribution plate with variable opening ratio needs to simulate the trajectory of hot air under a certain air volume and pressure to arrange changing openings Aperture and spacing require more complex targeted design and calculation; the dependence on air volume and pressure is greatly reduced, and the useless power consumption of fans is reduced, but the pertinence of drying conditions is increased, and the adaptability to changes is reduced. It is not easy to change and adjust the fan operating parameters

Both of the above two methods have the disadvantages that the dust of the dried materials is easy to accumulate in the air chamber to further pollute the fresh dried materials, and there is a disadvantage of difficult cleaning

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