CN2179960Y - Multi-section reversing flow-through tower type grain dryer - Google Patents

Abstract

The utility model discloses a grain drier, characterized by: the tower body sequentially comprises a feeding port, a drying section, a tempering section, a secondary drying section and a cooling section from top to bottom. The lower part of the cooling section is provided with a grain discharging grid plate and a discharge hole, the grain discharging grid plate is controlled by a shift motor, the drying section is separated by a plurality of layers of grain columns which are longitudinally arranged, the lower part of the drying section formed by the plurality of layers of grain columns is provided with a tempering section, the lower part of the tempering section is a secondary drying section formed by the plurality of layers of grain columns, the lower part of the secondary drying section is a cooling section, and the air inlet and the air outlet of the plurality of layers of grain columns are alternately arranged.

Description

Tower-type grain dryer

The utility model relates to the tower grain drier of a kind of multistage commutation percolation.

Grain drying is very important technical process in the grain storage work, many water content grains drying, developed the dry setting of all kinds for many years both at home and abroad in succession, it wherein is drying medium with the hot blast, cross-flow mode drying equipment, be that the grain flow direction is vertical with the drying medium flow direction, generally adopting " thick-layer drying principles " structure is individual layer net post formula grain post, depth of grain layer 300-400mm, in the dry run, individual layer grain post has not only influenced drying efficiency, and the grain layer is thicker in the grain post, the temperature of inner each point grain grain contact hot blast, it is bigger that humidity differs, even take to improve medium temperature, strengthen the commutation layer is set in air quantity and the grain post, still exist grain baking back inhomogeneous, inferior quality, defectives such as percent cracked rice height, simultaneously to penetrate resistance of grain layer big for hot blast, increase power consumption, cooling section is taked cross-flow, and cooling does not meet grain drying mechanism, for improving output, equipment volume is bigger, space availability ratio is lower, complex process, manufacturing cost height.

The purpose of this utility model provides that a kind of equipment volume is little, space availability ratio is high, drying efficiency is high, the tower grain drier of the uniform multistage commutation percolation of grain heat-drying.

The purpose of this utility model adopts following technical scheme to be achieved:

Accompanying drawing is a structural representation of the present utility model.

As shown in the figure: the utility model tower body is followed successively by feeding mouth, dryer section, delay section, redrying section, cooling section from top to bottom, be provided with moving type row's grain screen and discharging opening in the cooling section bottom, row's grain screen is by the displacement Electric Machine Control, dryer section is separated by the multilayer grain post of vertical setting, the dryer section bottom that consists of at multilayer grain post is provided with delay section, for the redrying section that is consisted of by multilayer grain post, be cooling section in the bottom of redrying section in the delay section bottom The inlet, outlet of multilayer grain post is for being arranged alternately.

Because the utility model is warded off new footpath in addition, absorb the elite of domestic and international all kinds of drying equipment, according to grain drying " thin layer principle ", depth of grain layer is 100mm only, and many net post types drying layer of original creation design, make the temperature of the grain grain contact hot blast at grain any position in drying layer, humidity is close, the in addition reasonable disposition of drying medium flow process, the hot blast multistage commutation of grain layer both sides, quality is even after making grain drying, the drying efficiency height, this machine can adopt square tower-like " building block system " steel framework structure, technology is reasonable, compact conformation, any parts have higher interchangeability in the tower body, the requirement of tower body internal condition grain drying technology, be provided with and give heat-drying-tempering-redrying-each section of cooling, wherein dryer section can be according to the grain moisture content size, the dry number of plies and dryer section are set arbitrarily, the moving speed of dry run China Oil and Food Import and Export Corporation laminar flow and tempering, the moving speed of cooling section grain laminar flow is non-such with present all kinds of drying equipments, three's flow velocity is close, but the dryer section flow velocity is tempering, 2.5 times of cooling section flow velocity, thereby realized grain rapid draing, at a slow speed tempering, the process for cooling requirement, dryer section is taked thin layer cross-flow stoving process, not only can intensified drying process, shorten drying time, improve heat exchange coefficient, and can improve equipment capacity, guarantee simultaneously and improve the grain heat-drying quality, cooling section adopts the adverse current stoving process, outside air contacts minimum temperature grain at first in the cooling procedure, be conducive to reduce the stress cracking that grain produces because of temperature shock, improve drying quality, draining crop mechanism adopts moving type row grain screen, and row's grain is even, speed can steplessly be adjusted, in " thin layer drying " process, it is little that hot blast penetrates resistance of grain layer, reduces power consumption, part waste gas is recycled and is saved heat energy, improve the thermal efficiency, equipment capacity is big, and volume is little, save material, low cost of manufacture.

Embodiment 1

Tower grain drier is worn in the multistage commutation, as figure, grain is sent in the tower by elevator, drying section 1 layer that is dried is divided into multilayer grain post 2, the dryer section bottom is a delay section 3, makes grain internal junction Heshui part to the extexine diffusive migration, and the delay section bottom is the redrying section, its underpart is a cooling section 5, and the cooling section bottom is a moving type row grain screen 6.Grain is flowed downward by cat head according to deadweight in the dry run, the inner no dead angle area of tower body, whole process about 3 hours at dwell time in the tower, precipitation range once＞8%, every index is better than national standard, "+" number expression air inlet among the figure, "-" number expression exhaust, each layer grain post inlet, outlet is for being arranged alternately.

Claims (1)

1, a kind of grain drier, comprise tower body, delay section, feeding mouth, discharging opening and row's grain screen, it is characterized in that: tower body is followed successively by feeding mouth from top to bottom, dryer section, delay section, the redrying section, cooling section, be provided with moving type row's grain screen and discharging opening in the cooling section bottom, row's grain screen is by the displacement Electric Machine Control, dryer section is separated by the multilayer grain post of vertical setting, the dryer section bottom that constitutes at multilayer grain post is provided with delay section, be the redrying section that constitutes by multilayer grain post in the delay section bottom, in the bottom of redrying section is cooling section, the advancing of multilayer grain post, the gas outlet is for being arranged alternately.