SU765613A1 - Apparatus for drying agricultural products - Google Patents

Description

The invention relates to installations for drying agricultural materials with various properties, such as grains, herbs. Known are universal installations for drying agricultural products with drying and cooling zones and a chain-slat conveyor located in them, perforated gas distribution grids under the conveyor branches. , central and lower gas distribution manifolds 1 The disadvantage of this installation is; its low productivity when drying materials with different properties. The purpose of the invention is to increase the productivity of the plant due to the implementation of the optimal technological scheme for the grain or vegetable-stem material. To achieve this goal, the installation contains lateral recirculation of the bottom box and a bypass channel connecting the lower and central collectors, in the latter of which there is a transverse partition and a prodral partition with a window, the recirculation box, the bypass channel, the lower collector and the window are provided with valves. FIG. 1 shows the proposed installation, plan view; in fig. 2 - section through the drying chamber; in fig. 3 shows section A-A in FIG. 2; in fig. 4 shows a section BB in FIG. 2; in fig. 5 shows a section B-B in FIG. 3; in fig. 6 - section through the drying chamber; in fig. 7 - section G-Y in FIG. 6; in fig. 8 is a sectional view of D-D and a fig. 7. FIG. 1-5 shows the sections of the installation when drying bulk materials, and FIG. 6-8 - when drying fibrous materials. The installation includes a drying chamber 1 with chain-slat conveyor 2, gas distribution grids 3, side gas distribution box 4, which consists of bypass 5 and recirculation 6 channels. The installation includes a mixing chamber 7, a heat generator 8, fans 9 and 10 .. B a central gas distribution manifold is equipped with a cross-section 11 and a lengthwise 12 partition.

in the lower manifold there is a turning flap 13. A longitudinal partition 12 is made

a window that overlaps with flap 14.

The fan 10 is connected to the lower gas distribution manifold by means of an diffuser with a valve 15. The lower gas distribution. The limiting grid 3 ends with an unloading device 16. A rotary partition 17 is provided in the bypass channel 5, and a rotary valve 18 is provided in the recirculation 6. The lateral wall of the drying chamber 1 has 19-21 windows with the bypass channel 5, with a recirculation channel 6 - window 22, and with the cooling fan diffuser - window 23, the Topj collection of central gas distribution manifold 24 and the lower 25.

The process of suji agricultural products in the unit proposed plant is carried out as follows. The wet material by the conveyor 2 is continuously moved from the loading point along the upper and then along the lower gas distribution grids 3 to the discharge device 16. When moving, the material is blown with heat-transfer agent, subject to flow.

When the bulk materials are cooled (see Figs. 1-5), the butterfly valves 13 and the partition 17 are installed in a vertical position. The window in the longitudinal partition 12 is closed by a shutter 14. The rotary shutter 18 opens the way for the partial exhaust coolant through the recirculation channel 6 to the mixing chamber 7. The shutter 15 is set to the open position. The heat carrier by the fan 9 is supplied to the lower super-thickened layer of material and through the windows 19 and 21 and bypass kshal 5 to the wet material located on the upper grate. Atmospheric air for cooling the dried material by the fan 10 is supplied to the cooling zone. The heat carrier exhausted in the upper layer is emitted into the atmosphere, and from the lower layer, along with the air heated in the cooling zone, is directed through the window 22 through the recirculation channel 6 to the mixing chamber 7.

For sushk.ch poorly flowable stalked materials, the porter installation (see Fig. 6-8) is rearranged, the cooling zone flap 13 is turned, and the partition 17 of the bypass channel 5 is set to the horizontal position, by the flap.

14 opens a window in the longitudinal partition 12, the rotary valve of the recirculation channel 6 and the valve | 15 from the cooling fan 10 are set to the closed position. The coolant is supplied only to the lower gas distribution manifold, passes through the dried lower layer of material, and then most of it goes through the windows 20 and 21 and the bypass channel 5 is fed under the upper layer,

the smaller part is through the window opened by the flap 14 into the zone of preliminary drying.

This installation allows you to improve the technical and economic performance and productivity, making the most of

its main devices. The system of pivotal partitions and dampers in combination with gas distribution manifolds connected by channels, allows you to quickly change the technological scheme, with sui

bulk materials, such as grains, supply of heat-transfer agent to each layer with partial recycling and cooling of dried material in the cooling zone, and when drying low-density stalked, for example, herbs, heat transfer medium is sequentially processed in two layers using the cooling zone as a drying layer.

Claims (1)

Invention Formula A plant for drying agricultural products, containing a chamber with drying and cooling zones and a chain-slat conveyor located in it, perforated gas distribution grids installed under the conveyor branches, central and lower gas distribution collectors, which in order to increase productivity, the installation contains a lateral recirculation box and a bypass channel connecting the lower and central collectors, in the latter of which there is a transverse partition and a longitudinal and a partition with a window, the recirculation box, the bypass channel, the lower manifold and the window being provided with flaps. Sources of information taken into account in the examination 1. USSR Copyright Certificate № 444042 Cl. F 26 V 17/04, 1974. P f Figure 1 I g / j. 777- I l l / 5 25 L5 0 // city / I- / 1 l-r0: / g. 3 B- 6 G 5 // FIG. 6,138 / eleven and YYY 7 Z1