CN201230545Y - Backward and forward grain drier - Google Patents

Abstract

The utility model discloses a reverse and fair current food grain dryer which comprises a machine body having a vertical structure; the top of the machine body is provided with a food grain inlet, a food grain storage room, a drying room, a cooling chamber and a food grain discharge room are sequentially communicated under the food grain inlet, wherein the side wall of the drying room is provided with a hot air inlet and a waste air outlet, the side wall of the cooling chamber is provided with a cold air inlet and a waste air outlet, the bottom of the food grain discharge room is provided with a food grain discharge hole, and the drying room is provided with three groups of drying layers from top to bottom, wherein the topmost group of drying layers and the undermost group of drying layers consist of a reverse current drying section and a fair current drying section, and the middle group of drying layers consist of the fair current drying section; the hot air inlets are respectively arranged at the lower side of the reverse current drying section and the upper side of the fair current drying section, and the waste air outlets are respectively arranged at the upper side of the reverse current drying section and the lower side of the fair current drying section. The utility model is suitable for drying multiple grain varieties such as maize, soy bean, paddy, and the like and has the advantages of remarkable energy-saving effect, high thermal efficiency, good quality of the dried food grain, no scorch and smash, correspondence to the natural drying law, and the like.

Description

Contrary following current foodstuff drying device

Technical field

The utility model relates to a kind of drying equipment, is specifically related to a kind of contrary following current foodstuff drying device.

Background technology

Along with sustained and rapid development economic and science and technology, China's grain yield increases day by day, the Northeast is the main silo of China, grain is many, also brought a great problem, because grain is after results, contain bigger moisture, can not put in storage at once, need through oven dry or airing, otherwise putting in storage back grain will moldy metamorphism, in addition, the moisture content of grain is too high, will produce heat, thereby cause the egg hatch in the grain, strengthened the destruction of disease and pest, therefore, airing or the drying of grain before storage is absolutely necessary, and airing needs broad place and good weather, and grain harvest weather in season in the Northeast's has changeed ice, even begin to snow, airing is infeasible at all, if grain can not be dried timely, cause very big economic loss, the most complex structure of existing foodstuff drying device, volume is big, the single stoving process of many employings on the stoving process flow process, and it is big as energy consumption that foodstuff drying device is existed aspect oven dry, the thermal efficiency is low, oven dry back grain has burnt the paste, many deficiencies such as fragmentation.

The utility model content

The utility model provides a kind of obvious energy conservation, thermal efficiency height, has dried by the fire the contrary following current foodstuff drying device that the back grain quality is good, nothing Jiao sticks with paste, nothing is broken, meet the air dry rule in order to solve weak point of the prior art.

For solving the problems of the technologies described above, contrary following current foodstuff drying device of the present utility model, the body that comprises vertical structure, the top of body offers grain-entering mouth, be communicated with the grain storage chamber below the grain-entering mouth, grain storage is communicated with drying chamber below the chamber, the drying chamber sidewall offers hot blast import and waste gas outlet, be communicated with cooling chamber below the drying chamber, the cooling chamber sidewall offers cold wind import and waste gas outlet, be communicated with row's grain chamber below the cooling chamber, row's grain chamber bottom row of offering grain mouth, described drying chamber is provided with three groups of baking zones from top to bottom, go up most one group and the baking zone of next group by an adverse current oven dry section and a following current oven dry section composition, middle one group baking zone is made up of following current oven dry section, and the hot blast import is located at the downside of adverse current oven dry section and the upside of following current oven dry section respectively, and waste gas outlet is located at the upside of adverse current oven dry section and the downside of following current oven dry section respectively.

The following current oven dry section of the one group of baking zone in centre of described drying chamber is provided with two-layer continuously.

Be equipped with delay section below the adverse current oven dry section of described drying chamber and the following current oven dry section.

The cold wind import of described cooling chamber is opened in the middle part sidewall of cooling chamber, and waste gas outlet is opened in the upper portion side wall and the lower sides of cooling chamber.

Adopt said structure, the grain of grain in entering dryer at first will heat up, have only grain temperature height to be elevated to certain degree and could carry out effective caloic exchange with hot blast, the drying mode that adopts contrary following current to replace from top to bottom, grain at first enters adverse current oven dry section through the grain storage chamber after entering this machine, freezing grain and hot blast are to carry out heat exchange with the form of counter current contacting, the thermal efficiency is very high, grain obtained rapidly heating up in the extremely short time, and then enter following current oven dry section, grain and hot blast carry out the caloic exchange with the following current form, the damp grain of low temperature of hot blast contact high-moisture percentage, grain contact thermal medium is in about several seconds, by the precipitation fast that heats up also rapidly, and the unlikely intensification of grain is very fast, has guaranteed grain quality; It is according to the special circumstances of northeast grain and in conjunction with drying principles that baking zone is provided with three groups, in time adopts the form of adverse current and following current to different phase, thereby has guaranteed the quality of grain, has increased the thermal efficiency, has reached effect energy-conservation, that guarantee the quality; After each oven dry section delay section is set all, the outer temperature and humidity gradient of grain intragranular reaches the balance unanimity, guarantee to dry by the fire the quality and the precipitation rate of grain, drying chamber adopts concurrent drying at last, low-temperature grain contacts with hot blast, oven dry relatively relaxes with process between cooling off, has avoided causing damaging because of rapid heat cycle the situation of grain quality; Cooling chamber adopts contrary following current form, has both increased the thermal efficiency, has also guaranteed grain quality; The utility model is applicable to the drying of plurality of cereals kinds such as corn, soybean, paddy, principle according to grain drying and heat and mass, from angle energy-conservation, that guarantee the quality, and in conjunction with the actual conditions of northeast grain, have obvious energy conservation, thermal efficiency height, baking back grain quality good, do not have burnt stick with paste, do not have broken, meet advantage such as air dry rule.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

The specific embodiment

As shown in Figure 1, contrary following current foodstuff drying device of the present utility model, the body 16 that comprises the building block type vertical structure that is layering, the top of body 16 offers grain-entering mouth 17, be communicated with grain storage chamber 18 below the grain-entering mouth 17, be communicated with drying chamber below the grain storage chamber 18, in the present embodiment, drying chamber sets gradually adverse current oven dry section 1 from top to bottom, delay section 2, following current oven dry section 3, delay section 4, following current oven dry section 5, delay section 6, following current oven dry section 7, delay section 8, adverse current oven dry section 9, delay section 10, following current oven dry section 15 and delay section 11, lower sides in adverse current oven dry section 1 and adverse current oven dry section 9 offers hot blast import 20-1 and hot blast import 20-2 respectively, upper portion side wall offers waste gas outlet 20-3 and waste gas outlet 20-4 respectively, following current oven dry section 3, following current oven dry section 5, the upper portion side wall of following current oven dry section 7 and following current oven dry section 15 is respectively equipped with hot blast import 22-1, hot blast import 22-2, hot blast import 22-3 and hot blast import 22-4, lower sides is respectively equipped with waste gas outlet 22-5, waste gas outlet 22-6, waste gas outlet 22-7 and waste gas outlet 22-8, be communicated with cooling chamber 12 below the delay section 11 of the drying chamber bottom, cooling chamber 12 middle part sidewalls offer cold wind import 19, cooling chamber 12 upper portion side wall and lower sides offer waste gas outlet 35-1 and waste gas outlet 35-2 respectively, be communicated with row's grain chamber 13 below the cooling chamber 12, row 13 bottoms, grain chamber offer row's grain mouth 14.

During work, grain enters grain storage chamber 18 by grain-entering mouth 17, enter the adverse current oven dry section 1 of drying chamber then, grain that temperature is lower and hot blast are to carry out heat exchange with the form of counter current contacting, the thermal efficiency is very high, grain obtained rapidly heating up in the extremely short time, enter delay section 2 then, the outer temperature and humidity gradient of grain intragranular reaches the balance unanimity, guarantee to dry by the fire the quality and the precipitation rate of grain, and then enter following current oven dry section 3, grain and hot blast carry out the caloic exchange with the following current form, the low temperature tide grain of hot blast contact high-moisture percentage, grain contact thermal medium is in about several seconds, by the precipitation fast that heats up also rapidly, and the unlikely intensification of grain is very fast, guaranteed grain quality, through continuous three layers concurrent drying and tempering, when being about to enter cooling, carry out once contrary concurrent drying again, because hot blast temperature is controlled separately, this moment, hot blast temperature was relatively lower, carry out contrary concurrent drying, utilize the high further precipitation of characteristics of the thermal efficiency of the counter-current drying of adverse current oven dry section 9, effectively remove grain inside in conjunction with water, enter following current oven dry section 15 at last and adopt concurrent drying, low-temperature grain contacts with hot blast, and oven dry relatively relaxes with process between cooling off, has avoided causing damaging because of rapid heat cycle the situation of grain quality.If adopt the adverse current oven dry at last, hot blast contacts with outlet temperature grain, the grain temperature is very high, and then cool off, the stress of grain inside can not get relaxing, and grain quality is reduced, and also heat is caused very big waste in addition, through the deliquescing of tempering after heat epidermis, the pore expansion, internal moisture is moved to epidermis, and precipitation is just very easy, grain enters cooling chamber 12, adopt the methods for cooling of contrary following current, both increased the thermal efficiency, also guaranteed grain quality, dry cooled grain enters row's grain chamber 13, is discharged to collect by row's grain mouth 14 at last and puts in storage.

Claims (4)

1, contrary following current foodstuff drying device, the body that comprises vertical structure, the top of body offers grain-entering mouth, be communicated with the grain storage chamber below the grain-entering mouth, grain storage is communicated with drying chamber below the chamber, the drying chamber sidewall offers hot blast import and waste gas outlet, be communicated with cooling chamber below the drying chamber, the cooling chamber sidewall offers cold wind import and waste gas outlet, be communicated with row's grain chamber below the cooling chamber, row's grain chamber bottom row of offering grain mouth, it is characterized in that: described drying chamber is provided with three groups of baking zones from top to bottom, go up most one group and the baking zone of next group form by adverse current oven dry section and following current oven dry section, middle one group baking zone section is made up of the following current oven dry, the hot blast import is located at the downside of adverse current oven dry section and the upside of following current oven dry section respectively, and waste gas outlet is located at the upside of adverse current oven dry section and the downside of following current oven dry section respectively.

2, contrary following current foodstuff drying device according to claim 1 is characterized in that: the following current oven dry section of the one group of baking zone in centre of described drying chamber is provided with two-layer continuously.

3, contrary following current foodstuff drying device according to claim 2 is characterized in that: be equipped with delay section below the adverse current oven dry section of described drying chamber and the following current oven dry section.

4, contrary following current foodstuff drying device according to claim 3, it is characterized in that: the cold wind import of described cooling chamber is opened in the middle part sidewall of cooling chamber, and waste gas outlet is opened in the upper portion side wall and the lower sides of cooling chamber.

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