SU1150457A1 - Recirculation drier - Google Patents

Abstract

RECIRCULATION GRAIN DRYER, containing a countercurrent heating chamber, a heat exchanger bunker to which the drying and cooling ducts with ducts are connected, a gas supplying chamber located between the mines, a zluzionny column for heating the grain, connected to the drying shaft to the drying shaft, and gas pipelines for heating the grain, connected to the drying shaft to the drying shaft, and gas pipelines for fresh grain, connected to the drying shaft, and gas pipelines for fresh grain, and gas pipelines for fresh grain, connected with a drying agent to the drying shaft, and gas pipelines for fresh grain, connected with the drying shaft to the drying shaft, and gas pipelines for fresh grain, connected to the grain, connected with a drying agent to the drying shaft, and gas pipelines for fresh grain, connected to a fresh air heater, heated grain, connected through a drying agent to the drying shaft, and gas pipelines for fresh grain, connected to a fresh air heater, connected with a drying agent to the drying shaft, and gas pipelines for fresh grain, connected to a fresh air dryer cooling air and recycling the spent drying agent, which means that, in order to increase productivity and reduce fuel consumption, part of the drying box The second shaft is made through passage for a fresh drying agent with regulating dampers, and between this shaft and the louver column there is additionally installed a mixing chamber for fresh and spent drying agent, equipped with a tray-collection of impurities and a screw conveyor for their removal.

Description

cl

about

4 SL

The invention relates to the technique of drying grain and can be used in grain-receiving enterprises of the harvesting system and in agriculture. The purpose of the invention is to increase the productivity of the grain dryer and reduce fuel consumption for drying the grain. Figure 1 shows schematically the proposed dryer; in Fig.2, section A-A in Fig. 1} in Fig. 3 - a pop river section of the drying shaft; 4 is a section B-B in FIG. 3, the recirculating grain dryer contains operational bins 1 and 2, a louver column 3 for preheating the raw grain with a loading bunker 4 and an exhaust device 5, a counter-current heating chamber 6 with a loading hopper 7 , a contact heat exchanger divided by a longitudinal partition 8 into compartments 9 and 10, a drying 11 and a cooling 12 shafts equipped with non-power exhaust devices 13 and 14, a chamber 15 for mixing fresh and spent into a drying agent stack and deposition of dust in casings from this shaft, equipped with a collecting tray and a screw conveyor 16 for removing dust from the chamber, chambers 17 and 18 for supplying the drying agent and cooling air to the mines, heat-insulated partition 19, elevators 20 - 2 fans 23 - 25 furnace 26 , topside 28 and 27 and recirculating 29 and 30 gas pipelines, cyclones, dust separators 31, equipped with a common gas collector 32, a hopper for dust-related 33, samoteks 34-36. In the drying shaft, part of the supply 37 and discharge 38 ducts are made through, for which the plugs are removed at the entrance of the drying agent into the duct or in it and the rotary adjustment valve 39 is installed at the outlet ends of this row of ducts. The grain dryer works as follows. The initial raw grain from the operational bins enters the noria 20, and then into the hopper 4, and, passing the louvered column 3, is heated by 10-15 ° C and dries due to the transverse blowing of the layer with a mixture of fresh and spent drying agent (11) in the mine 11 temperature 6072 ° C and a relative humidity of 25-35%. i In the steady state operation of the grain dryer, the heated and partially dried raw grain coming out of the column by means of an outlet 5 is removed from the column and mixed with the recirculating from the drying shaft and but Riya 21 is fed to the feed hopper 7 and the countercurrent heating chamber 6, where it additionally heats up to the maximum allowable temperature in the countercurrent of the mixture of fresh and spent drying agent in this chamber with a temperature of 250-350 0 and a relative humidity of 1.5-2.5%. The heated grain coming from the heating chamber during the filling of the drying shaft and the compartment 9 of the head of the storage tank of the heat exchanger through the drain window in the upper part of the partition 8 fills the cooling shaft 12 and the compartment 10 of the heat exchanger. In the process of grain extraction in the compartments of the heat exchanger bunker for 10–20 minutes, temperature equalization occurs and the moisture content in the grain is partially redistributed, which intensifies its drying and cooling processes, reducing the possibility of grain overheating. The recirculating grain, after the binning in the compartment, is additionally dried in the Drying shaft with an isothermal condition at a drying agent temperature of 70-100 ° C and a relative humidity of 5-10%. At the same time, part of the drying agent (20-25% of the total input into the mine), without blowing a layer of grain in the mine, enters the chamber 15 through the passageways into the chamber 15, where it mixes with the drying agent spent in the mine, and then passes through the layer of the moved raw grain in louver column. The grain from the drying shaft is recycled by means of the non-power outlet device 14. The grain, after being settled in the compartment 10 of the heat exchanger, enters the cooling shaft and as a result of blowing the layer with atmospheric air with a temperature t | 3 it is cooled and partially dried, and then with the help of an outlet device 13 is sent to the elevator 22 and removed from the dryer. The installation of drainage drips 3436 ensures the operation of the grain dryer at the maximum possible loading of the compartments of the heat exchanger and the hopper above the louvered column, eliminates the blockage of norias grain and the backflow of the countercurrent heating chamber. The proposed recirculation grain dryer provides for the utilization of the heat of the drying agent spent in the heating chamber and the drying shaft by mixing it with fresh from the furnace and re-passing the reward through the grain layer in the chamber, the drying shaft and the louvre heater. This became possible as a result of the installation of an organization 1150 5 10 574 mixing chamber between this shaft and the louvre heater, as well as the installation of recirculation air ducts, which ensure (after cleaning from dust and mixing with fresh) the supply of the drying agent spent in the heating chamber again to this heating chamber and the drying shaft. The installation at the bottom of the mixing chamber of the collection tray of the slush precipitates and the screw conveyor 16 ensures reliable operation of the mixing chamber and allows for the necessary adjustment of the aerodynamic mode of operation of the drying shaft, precluding the removal of normal grain from the discharge and through ducts.

6B

AT

33

eleven

.15

37

38

39

39

te.J

Fig.C

Claims (1)

A RECIRCULATING GRAIN DRYER containing a countercurrent heating chamber, a heat and moisture exchanger hopper, to which a drying and cooling shaft with ducts, a gas supply chamber located between the shafts, a louver column for heating grain, a hook) are connected through the drying agent to the drying shaft, and gas lines for the fresh drying agent cooling air and recirculation of spent drying agent, characterized in that, in order to increase productivity and reduce fuel consumption, part of the duct of the drying shaft they are made as a passage for a fresh drying agent with control dampers, and between this shaft and a louvered column an additional mixing chamber is installed for a fresh and spent drying agent, equipped with an impurity collector tray and a screw conveyor at the bottom for their output. 1 1150457 2