CN85203488U

CN85203488U - Tower-form grain drier without ventilating box

Info

Publication number: CN85203488U
Application number: CN 85203488
Authority: CN
Inventors: 臧安国; 张化杰; 李和平
Original assignee: Liaoning Provincial Grain Research Institute
Current assignee: Liaoning Provincial Grain Research Institute
Priority date: 1985-08-16
Filing date: 1985-08-16
Publication date: 1986-06-18

Abstract

The utility model relates to a tower-form grain drier without a ventilating box, which can be used for drying grains. The drying medium is the indirect heated air, and the utility model adopts the countercurrent method to carry out drying. Ventilating nodes are arranged between sections, and the inner part of each ventilating node is composed of a plurality of funnels with holes or without holes. Definite gaps are arranged between the funnels, and inner part of each section isn't provided with the ventilating box device. The grain falls along a curve in the drying process, and the hot and the cool medium carry out the drying and the cooling effects on the grain through the funnels in the ventilating nodes. The utility model has the advantages of large drying strength, uniform drying, low heat consumption, etc. In the condition that the inferior coal is used, the heat consumption is about 1300 kilocalorie for evaporating one kilogram water to dry the corn.

Description

A kind of tower grain drier that does not have the venting box device

The present invention can be used for grain drying, and it relates to grain and falls naturally by gravity, the similar grain drier that drying medium following current and adverse current from grain are passed; Its medium is a kind of air of being crossed by indirect; The present invention is exactly the wet exchange of heat of carrying out following current and adverse current with the special construction and the grain of this pure hot-air by inside.

Before the present invention occurred, the drying machine of similar structures all adopted concurrent drying, and promptly grain stream is consistent with the flow direction of thermal medium; The adverse current that adopts in cooling that also has is cooled off; Rower drier is existing following current, again adverse current is arranged, and all contains the venting box structure in its dryer section and the cooling section.This concurrent drying mode and rower drier have its superiority, but its dry tenacity is lower, and precipitation is irregular, dry particularly that moisture it is little to exist precipitation range when the grain below 20%, consume blower pressure bigger wait not enough.

The present invention be a kind of be the tower grain drier of drying medium with the indirect air, wherein tower body mainly by

The grain section, give hot arc, dryer section, delay section, cooling section and delivery device is formed, each is intersegmental is furnished with the joint of ventilation; Each intersegmental part does not have the venting box device; Grain enters

After the grain section, fall successively, by from delivery device, discharging behind the cooling section.Thermal medium is to go downstream in giving hot arc, is to sail against the current in dryer section, and the cold medium that enters in the cooling section also is upstream.The top that this machine gives hot arc is furnished with the joint of ventilation, it is characterized in that this ventilations saves to be made up of some funnels not with holes, and certain interval is arranged between funnel; Being furnished with the joint that ventilates between hot arc and the dryer section giving, forming by some funnels that have many holes.When grain fell, thermal medium was to pass the grain layer from bottom to top in dryer section, Here it is said counter-current drying; It is that this ventilation joint also is made up of some funnels that have many holes, and certain interval is arranged between funnel, is sealed in the bottom of pasting the funnel gap owing to be furnished with the joint of ventilation between dryer section and delay section that hot blast can pass from bottom to top; Under the ventilation joint is delay section, when thermal medium enters when ventilating joint from diffusor entry, just blown in the hole of funnel and enter in the dryer section, adverse current is passed the grain layer from bottom to up, then discharges from the ventilation joint diffuser outlet of giving between hot arc and the dryer section.Also be furnished with the joint of ventilation in the cooling section bottom, this ventilation joint also is made up of some funnels with holes, and certain interval is arranged between funnel, is sealed in the bottom of pasting the funnel gap.The area in each hole on the above-mentioned funnel of mentioning should be less than the granularity of baking grain grain, on the funnel in the joint that ventilates the porose gross area should be slightly larger than the sectional area of the intake stack of diffuser.Owing to, therefore do not have the venting box device at each intersegmental part giving heat, drying, tempering, the mutual junction of cooling section and giving the hot arc top and the flow direction that cooling section bottom is furnished with the hot and cold medium of joint control that ventilates respectively.It is not each other on same vertical line that each intersegmental funnel is arranged, and therefore works as grain and enters Grain section and when falling is actually that curve falls in the process after cooling section is discharged.

The present invention adopts the reflux type drying to dryer section grain, can guarantee that the outlet of grain in dryer section contacts with the medium of maximum temperature all the time; When grain begins when preheating section falls, its grain temperature is low, moisture content is high, the rising of grain temperature, moisture content reduce behind the contact thermal medium, grain after the intensification that at this moment continues to fall and that reduce moisture content continues to contact with high temperature thermal medium in dryer section, this just helps disposable grain moisture content being dropped to safe moisture content, the precipitation that also helps low moisture content grain can reach that dry tenacity is big, uniform drying, purpose that hear rate is low, is using under the colm condition; The hear rate of dry corn evaporation per kilogram water is about 1300 kilocalories; This machine has also cut the venting box device in each section, but the touch opportunity of economical with materials, simplified structure and increase medium and grain; The grain curve falls can play the effect of mixing in addition.

Be illustrated below with reference to 1,2,3 pairs of inventions of drawing

The explanation of Fig. 1

This machine is made up of tower body, combustion furnace, heat exchanger three parts.The tide grain in tower body by

The grain bucket 1. successively 3. by preheating section by gravity fall, dryer section 6., delay section 8. with cooling section 10., after collection grain bucket (13) by outside delivery device (14) the discharge machine, thereby finish whole dry runs; 7. the drying medium (adding hot-air) that comes out from heat exchanger enters in the tower through diffuser (17), the joint that ventilates, and sails against the current then by dryer section 6., and 4. its dry waste gas through ventilating joint, diffuser 5., outside (16) discharge machine; The cold wind of cooling section is to be entered in the tower by diffuser (12), the joint (11) that ventilates, and when sailing against the current by cooling section 10., 9. its cooling exhaust saves through ventilating, diffuser (18) is discharged; This part waste gas of discharging is used again, replenished behind a little hot blast medium as preheating section, 2. enter in the tower through diffuser (15), the joint that ventilates, go downstream by preheating section, its waste gas also be through ventilate joint 4., diffuser 5., outside (16) discharge machine.

The explanation of Fig. 2

1. being funnel shaped, for the hole on the bucket, 3. is the gap location between the funnel 2., 4. is the bottom of airtight funnel.

The explanation of Fig. 3

This figure is atresia, the funnel of back cover not.

Claims

1, a kind of is the grain drier of being made up of combustion furnace, heat exchanger and tower body of drying medium with the indirect air; Wherein said tower body mainly comprises

The grain section, give hot arc, dryer section, delay section, cooling section and delivery device.Each intersegmental junction is furnished with the joint of ventilation; It is characterized in that the ventilation joint between said dryer section and the delay section is made up of some funnels that have many holes, certain interval is arranged between funnel, locate to be sealed in the bottom of pasting the funnel gap; Ventilation joint under the said cooling section is characterized in that said ventilation joint is made up of some funnels that have many holes, and certain interval is arranged between funnel, is sealed at the lower curtate place of pasting the funnel gap.

2, according to the said ventilation joint that gives the hot arc top of claim 1, it is characterized in that said ventilation joint is made up of some funnels not with holes, certain interval is arranged between funnel.

3, according to the funnel in the said ventilation joint that gives between hot arc, dryer section, the cooling section of claim 1, it is characterized in that said funnel is not on same vertical line.

4, according to the said some funnels with holes of claim 1, it is characterized in that the aperture in each hole should be less than the granularity of baking grain grain, the gross area in hole should be slightly larger than the sectional area of the intake stack of diffuser on all funnels in the joint that ventilates.