CN2157461Y

CN2157461Y - Material dryer

Info

Publication number: CN2157461Y
Application number: CN 92246138
Authority: CN
Inventors: 宋文华; 宋郁
Original assignee: NORTHEAST CHINA ELECTRIC POWER COLLEGE
Current assignee: NORTHEAST CHINA ELECTRIC POWER COLLEGE; Northeast Electric Power University
Priority date: 1992-12-31
Filing date: 1992-12-31
Publication date: 1994-02-23
Anticipated expiration: 2002-12-31

Abstract

The utility model relates to the improvement of a material dryer with a fluidized bed for drying the granular material of low temperature. A casing is divided into a drying chamber in an upper part and a wind chamber in a lower part through a horizontal hole plate. Horizontal and longitudinal heating pipe series and a series of transversal partition plates are arranged above the hole plate. A longitudinal partition plate can be arranged. The height of the partition plate is higher than that of material fluidization. The material enters from an inlet and is in a fluidized state under the action of a medium. The material flows from a gap below the transversal partition plate to an outlet direction. The material and the medium are heated simultaneously. The material is cooled in a cooling region. The utility model has the advantages of non-deterioration for the material, high efficiency, rapid drying speed, great percent of removed water, and utilization of residual gas.

Description

Material dryer

The utility model relates to the improvement of material drying device, particularly relates to the improvement with fluidizing drying bed drying device, is applicable to the drying of graininess material.

Steam power drying unit commonly used comprises boiler, several thermal towers, Leng Ta.Boiler produces the saturated vapor with certain pressure, and the undue drum of warp enters the coiled pipe of thermal towers at different levels respectively, enters trench or send boiler back to after heat exchange.The material of being dried is successively by thermal towers at different levels, from the top down, be heated through coiled pipe, and be vaporized with part moisture, wet steam is extracted out by air-introduced machine and is entered atmosphere, and material enters Leng Ta after being dried by thermal tower, and cold tower causes circulation of air by air-introduced machine, make material be cooled to uniform temperature, collect then and preserve.This drying device structure is huge, and the use steel are many, drive apparatus is many, civil engineering costs is high.

The 5HY-2.5 type foodstuff drying device that tractor-operated machine factory under the agricultural machinery company of Chengdu produces has overcome more above-mentioned shortcomings, this dryer comprises cooking stove, blower fan and drier, its drier comprises housing, be provided with the orifice plate of inclination in the housing, orifice plate is being divided into two parts up and down in the shell, top is hothouse, the bottom is an air compartment, hothouse has the grain inlet in the higher side of orifice plate, a side lower at orifice plate has grain-export, the waste discharge gas port is arranged at top, on orifice plate, have oval-shaped hole density interphase, the high-temperature flue gas that blower fan produces cooking stove during work is sent into the air compartment of drier, enter hothouse through orifice plate, close place, hole air quantity is big, grain above the orifice plate is blown afloat, the adjacent of dredging to the hole falls, because orifice plate tilts, making the total flow direction of grain is to flow to lower outlet from higher inlet, because grain is constantly blown afloat by high-temperature flue gas in flow process, be so-called fluidisation, increased the touch opportunity of flue gas and grain, can make the moisture in the grain vaporize out more fully, moist waste gas is discharged by the exhaust outlet on top, and the grain that is dried is flowed out by grain-export.The weak point of this drying machine is: the heat dissipation energy is many, and is seriously polluted to dried material, produces burnt paste, be full of cracks, quick-fried waist, destruction material chemical analysis, and one time precipitation range is too little.

Task of the present utility model provides that a kind of thermal efficiency height, precipitation range are big, precipitation speed is fast, baking temperature is low, does not produce pollutions, the drying device of assurance quality of material.

Task of the present utility model is to realize like this.Drying device comprises the orifice plate in housing and the shell, and orifice plate is divided into two parts up and down to space in the shell, and its top is divided into hothouse, and the bottom is divided into air compartment, and the hothouse side is provided with material inlet, material outlet, and top is provided with waste gas outlet, and the side is provided with peep hole.The air compartment side is provided with the drying medium inlet.Said orifice plate is horizontal level, the orifice plate periphery seals close the connection with housing, and the aperture that gathers on the orifice plate is provided with a series of lateral partitions vertical with orifice plate above orifice plate, also be provided with the heating piping of level, heating tube connects with steam inlet that is located at housing and condensate water outlet mutually by the collection case.What is called laterally is meant vertical with the flow direction of material in drying device, and flow direction of material then is vertical.

For material can only be passed through from lateral partitions bottom, the height of lateral partitions is higher than the fluid height of material, is provided with uniform gap between the bottom of lateral partitions and the orifice plate, and this gap is greater than the size of material, and the two side ends of transverse plate is very close to each other.

In order to produce good goods fluid effect, the percent opening of orifice plate is 5-40%, and aperture is uniform, and hole shape is a kind of in circle, square, rectangle, the ellipse.

For the said heating piping of the rate of drying of accelerating material is vertically arranged, promptly parallel with flow direction of material, and the steam inlet of heating tube and material inlet are positioned at the same side of drying device, because heat exchange, make heating piping diminish gradually, form the low temperature falling-rate periods of drying the rate of heat addition of drying medium and material the flow direction along material.

In order above orifice plate, to be provided with at least one longitudinal baffle the drying time that increases material, the height of longitudinal baffle is higher than the fluid height of material, longitudinal baffle is except that the material turning point, its lower end is connected no gap with orifice plate, and at the material turning point, be provided with the gap between the lower end of longitudinal baffle and the orifice plate, this gap is greater than the size of material.Corresponding is, heating piping passes longitudinal baffle by the collection case and still is vertical layout at the material turning point, and the flow direction with material is consistent all the time to make the flow direction of steam in heating tube.

No matter the drying device of longitudinal baffle or the drying device of no longitudinal baffle are arranged, and one section before material outlet is the cooling zone, and this orifice plate top, district does not have heating tube, and heating piping stopped before this district, and material is cooled to allowable temperature by this district the time.

For the drying medium that makes air compartment evenly passes the aperture of orifice plate, in air compartment, be provided with equal pressing plate, equal uniform apertures on the pressing plate, all the pressing plate periphery is connected with housing, and is very close to each other.

In order to guarantee the modulability of drying device, be respectively equipped with control valve at material inlet and material outlet and heating steam import.

Intensive aperture on the orifice plate can be uniform, also can be non-uniform.Orifice plate can connect by the flange at housing middle part, and housing two parts up and down is convenient to installation and maintenance with the flange connection.

Advantage of the present utility model:

1, because material and drying medium are to obtain heat from the heat pipe that feeds steam, belong to low temperature drying, material does not contact flue gas, so material is not contaminated in dry run, the phenomenon of burnt paste, be full of cracks, quick-fried waist and destruction material chemical analysis can not take place.

2, the design of conventional drying device will be determined certain drying condition, be constant rate of drying or falling-rate periods of drying, but the drying mechanism in two stages and influence factor are completely different, and the water content of material often alter a great deal during practical application, the measure of being taked is not necessarily effective, so the thermal efficiency is low.The drying device that the utility model provides on the advantage basis that guarantees the conventional drying device, has adopted to overcome its not enough measure, has realized fast efficient on the basis of low temperature drying.

3, can utilize low-grade heat source, for example industrial residual air has energy-saving significance.

4, no drive disk assembly and rotatable parts are simple in structure, and volume is little.

5, drying medium blows away light foreign material in the dry run, and material obtain in the cooling zone again the cooling, so this dry device is to integrate selection by winnowing, drying and cool off three functions.

6, this device precipitation range is big, and adaptability is strong, and drying capacity is big, and drying time is short, and is easy and simple to handle, regulates nimblely, is suitable for automation.

The utility model is described in further detail below in conjunction with drawings and Examples.

Fig. 1 is the vertical section schematic diagram with drying device of a longitudinal baffle.

Fig. 2 is the vertical view with drying device of a longitudinal baffle.

Fig. 3 does not have the vertical profile of the drying device of longitudinal baffle to look schematic diagram.

Embodiment 1, drying device with a longitudinal baffle, referring to Fig. 1, Fig. 2, substantially the horizontal orifice plate 2 in the housing 1 that is rectangle is divided into two parts up and down to housing, and top is hothouse 3 and cooling zone, the bottom is an air compartment 4, orifice plate 2 peripheries are connected zero-clearance with housing, the circular aperture that evenly gathers on the orifice plate, and this hole is drying medium enters hothouse from air compartment a passage.Air compartment one side is provided with drying medium inlet 15, the bottom is inclined upwardly Zi the far-end that enters the mouth, there is the even pressing plate 14 of level at the air compartment middle part, all the pressing plate periphery closely is connected with housing, all densely covered aperture on the pressing plate is provided with longitudinal baffle 7 and vertical with it a series of lateral partitions 6 above orifice plate 2, and longitudinal baffle and lateral partitions are all vertical with orifice plate, it highly all is higher than the fluid height of material in drier, and longitudinal baffle and lateral partitions can be sustained height.Causing in the goods fluid height, is that the common engineers and technicians in this area are known, and it can be by calculating or testing and determine.Be provided with uniform gap between the lower end of each lateral partitions and the orifice plate, this gap is greater than the size of material.Longitudinal baffle leaves the gap same with lateral partitions between material turning point lower end and orifice plate, all the other then are to connect closely.In hothouse, be provided with heating piping 5 above the orifice plate, heating piping passes each lateral partitions from longitudinal baffle one side, pass longitudinal baffle at the housing other end by the collection case and be vertical layout again, pass each lateral partitions, stopping apart from terminal certain distance, top is a collection case and is fed outside the shell by a pipe, be steam inlet 10, terminal also combines in the collection case, leads to outside the shell i.e. condensate water outlet 11 by a pipe.There is not one section drying bed of heating tube to be the cooling zone, top in the heating tube steam inlet, promptly the top, hothouse side of housing is provided with material inlet 8, in the housing side of steam outlet near orifice plate, be provided with material outlet 9, drier top is provided with waste gas outlet 12.

During work, put into certain thickness material by the material mouth, by drying medium inlet, the drying medium that feeds certain pressure is a compressed air, and drying medium passes orifice plate after by equal pressing plate, makes goods fluid, promptly is in fluidized state.The waste gas outlet of waste gas above hothouse discharged, and the steam inlet of heating piping feeds steam or other industrial exhaust heats.Material is heated in fluid mapper process with drying medium, the outer moisture content vaporization of material is discharged by outlet with waste gas, and outlet is shifted in the gap that material passes under fluidized state below the lateral partitions successively, at last in the cooling zone, drop to the temperature of permission and flow out from material outlet.In fluid mapper process, reduce gradually to the material outlet temperature from material inlet, enter the compressed-air actuated temperature of hothouse, the fluidized state of humidity, speed and material is constant, yet in dry run, owing to be subjected to the restriction of heating tube steam, and temperature, humidity and the material temperature of hothouse inner drying medium, water content are all being changed, so this dry device has been realized non-constant drying, form condensate water in the heating tube after the steam heat release and emit by condensate outlet.

For the ease of installation and maintenance, this drying device divides two parts up and down, connects with flange, and orifice plate is crushed on flange and connects in the meet, and crimping face is provided with rubber washer.Lateral partitions can be fixed on the heating piping, and longitudinal baffle can be fixed on the lateral partitions, and there is the collection case at the heating piping two ends, and and the steam inlet, the condensate water outlet connects.

The drying device of embodiment 2, no longitudinal baffle is referring to Fig. 3.Orifice plate 2 tops have only a series of lateral partitions 6 in the housing 1, not turnover of heating piping 5, lead to the other end from an end, stopping compiling before arrival is terminal is that a pipe leads to outside the shell, it is condensate water outlet 11, same end in heating tube steam inlet 10 is provided with material inlet 8, and condensate water exports a side and is provided with material outlet 9 by the hole utmost point, and all the other are with embodiment 1.

Need to prove, " the seal connection " mentioned in this specification and claims book for the lower end of the two side ends of lateral partitions and longitudinal baffle be meant for be dried material can not by, can be in fact the gap that loose fit one class is arranged, its gap be much smaller than the size of material.

Claims

1, a kind of low temperature drying device, comprise the orifice plate 2 in housing 1 and the shell, the orifice plate upper space is a hothouse 3, and lower space is an air compartment 4, and hothouse is provided with material inlet 8, material outlet 9, waste gas outlet 12, peep hole 13, air compartment are provided with drying medium inlet 15, it is characterized in that: said orifice plate 2 is horizontal level, and the orifice plate top is provided with the heating piping 5 of a series of lateral partitions 6 and the level vertical with orifice plate.

2, device according to claim 1 is characterized in that: the height of lateral partitions, be higher than the goods fluid height, and be provided with the gap between the lower end of lateral partitions and the orifice plate, this gap is greater than the size of material, and the lateral partitions two side ends is that seal connects.

3, device according to claim 1 is characterized in that: the percent opening of said orifice plate is 5-40%, the hole be shaped as a kind of in circle, square, rectangle, the circle.

4, device according to claim 1 is characterized in that: said heating piping is for vertically arranging, and is promptly consistent with flow direction of material, and the thermal source of heating tube inlet 10 and material inlet 8 are positioned at the same side of device.

5, according to claim 1 or 2 or 3 or 4 described devices, it is characterized in that: above orifice plate, be provided with at least one longitudinal baffle 7, the height of longitudinal baffle is higher than the fluid height of material, the lower end of longitudinal baffle is connected with orifice plate, at the material turning point, be gapped between the bottom of end of longitudinal baffle and the orifice plate, the size in gap is greater than the size of material, and heating piping turns to the longitudinal baffle opposite side to keep flow direction consistent with flow direction of material all the time at the material turning point by the collection case.

6, device according to claim 5 is characterized in that: be the cooling zone between one section hothouse before the material outlet, promptly heating piping stopped before this district, and having a pipe that compiles to lead to shell is outward condensate water outlet 11.

7, device according to claim 4 is characterized in that: one section hothouse space before the material outlet is the cooling zone, and promptly heating tube stopped before this district.

8, device according to claim 1 is characterized in that: be provided with equal pressing plate 14 in air compartment 4, all pressing plate is the porous plate that horizontal perimeter is connected with housing, all the uniform aperture of pressing plate.