CN202588247U - High moisture tobacco material drying tower - Google Patents

Abstract

The utility model provides a tobacco material drying tower which can dry a high moisture tobacco material and has high heat utilization efficiency. The drying tower comprises a feed vapor lock, a material sucking venturi tube perpendicular to the ground and coaxial inner and outer drying cylinders, a negative pressure generated when the drying air flow passes through the venturi tube sucks the tobacco material into the inner drying cylinder, upper and lower sections of the inner drying cylinder have approximately equal diameters in the height direction, the diameter of the upper section of the inner drying cylinder is larger than that of the lower section of the inner drying cylinder, correspondingly, the diameter of the upper section of the outer drying cylinder is larger than that of the lower section of the outer drying cylinder, accordingly, the dry wind speed changes from slowly to fast in the inner drying cylinder, when the tobacco material reaches to the top end to be thrown to the outer drying cylinder, the dry wind speed changes from fast to slowly, the dried tobacco material can have a long heat exchange time of drying and can be fully dried in a diameter reducing drying area, and thereby the requirement for drying the high moisture tobacco material can be met. The high moisture tobacco material drying tower has the advantages that the energy is saved, the drying temperature is low, the drying efficiency is high, the crushed tobacco materials are few, technological requirements of processing strength and drying uniformity and the like of the high moisture tobacco material can be met, and the like.

Description

High-moisture tobacco drying tower

Technical field:

The utility model relates to the tobacco shreds drying equipment on the tobacco cutting production line, relates in particular to a kind of drying tower that utilizes moist heated-air drying high-moisture tobacco.

Background technology:

The tobacco drying is the important procedure in the tobacco cutting production process.The dry operation target of tobacco is moisture requirement and the precision of part moisture content to reach regulation of removing in the tobacco, improves the filling value of tobacco simultaneously, and assorted gas such as the excitant of minimizing tobacco and xylon gas improve the suction of tobacco and distinguish the flavor of.Dry run generally adopts heat conduction and thermal convection current form that the moistened tobacco material is heated, and makes water evaporates and discharge in the moist tobacco.

At present, the baking tobacco machine that the dry tobacco of domestic and international tobacco processing enterprise generally uses mainly contains fluidized bed type cut-tobacco drier, cylinder cut tobacco dryer and air-flow cut-tobacco drier etc.

Development through decades is perfect, and all kinds of cut-tobacco drier Cong Jie Gou ﹑ Performance And Reliabilities aspect has all reached higher level, can satisfy the demand of baking tobacco technology basically.But above-mentioned various baking tobacco drying equipments all are used for conventional moisture (generally below 40%) drying process demand to be designed; And with the tobacco (more than 45%) of traditional device processing high-moisture; Its baking temperature is very high very big with processing intensity; The quality of heavy damage tobacco, thus must be to the drying plant of the tobacco design special of special moisture, drying efficiency at first will be arranged efficiently and reduce tobacco and make broken; The second, certain reasonable baking temperature (160-220) ℃ arranged; The 3rd, equipment takes up an area of will be less, energy-conservation.

From several kinds of present baking tobacco machine performances relatively; The tobacco of cylinder baking silk is made broken higher, and drying capacity is lower, and energy consumption is also higher; Fluidized bed type cut-tobacco drier drying capacity is also on the low side; And dry back tobacco water uniformity is relatively poor, so, more than two kinds of form of device all be not suitable for being used for being used for dry high-moisture tobacco.And characteristics that pneumatic conveying drying has and advantage are relatively to be fit to high-moisture tobacco drying, are characterized in: gas-solid two white heat mass transfer surfaces are long-pending big, and drying efficiency is high; Because tobacco is in the high degree of dispersion state in air-flow, two alternate contacts area are increased greatly, in higher air velocity (under 20-40m/s) effects; The relative velocity of gas-solid two phases is higher, and volumetric heat transfer coefficient is big, and the high drying capacity of the thermal efficiency is stronger; Also relatively evenly, energy-saving effect is remarkable for moisture Control.So pneumatic conveying drying is drier than being more suitable for the high-moisture tobacco.

The core of pneumatic conveying dryer is exactly a drier; The drier of the normal air-flow that uses has many kinds in tobacco processing at present; Mainly contain straight pipe type, manage tower and back taper tubular type pneumatic conveyer dryer etc.; The baking temperature of wherein managing tower pneumatic conveyer dryer use is more suitable, and result of use is good, can better satisfy the demand of production technology.And for the tobacco of oven dry considerable moisture, straight pipe type and back taper tubular type pneumatic conveyer dryer in use baking temperature relatively with generally higher 10 to 30 ℃ of pipe tower driers, influence to some extent for the quality of tobacco.

For example CN2613153Y discloses a kind of and the supporting novel stem explosion puffing drying machine of the above primary processing line of production capacity >=8000kg/h; Its drying device that adopts is made up of reducer pipe, drying tower, reducing discharge nozzle and gas-material separator; In be provided with two groups of separators the discharging cover connect reducer pipe; And the inlet side of reducer pipe and expansion end connect the expansion material pipe that mixes in bellows and the drying tower respectively; The discharging opening of drying tower bottom is connected with gas-material separator through the reducing material pipe of expansion, and gas lock is equipped with in the bottom of gas-material separator; The gas-material separator top links to each other with heater with blower fan through backwind tube.This equipment drying efficiency is high, but that the reducing material pipe of its peripheral hardware takes up an area of equipment is big, and structure is compact inadequately, and the unresolved common broken problem of making.

CN201034408Y discloses a kind of new type of airflow formula stem drying tower, comprises the charging gas lock, connects the horizontal feed pipe through Venturi tube and is connected to drying tower; This drying tower is connected with feeder, and an expansion chamber wherein is set between described charging gas lock and Venturi tube; Described horizontal feed pipe connects an independently drying tower.For this reason, do not need to dispose warming and humidifying equipment separately, but the broken problem of making in the dry run do not solved at all, and can't be carried out the efficient drying of the high-moisture tobacco of moisture big 45%.

Summary of the invention

The utility model technical problem to be solved provides a kind of heat utilization efficiency height and can effectively realize the tobacco drying tower that the high-moisture tobacco is dry.

The utility model comprises charging vapour lock, suction Venturi tube and two inside and outside dryings that concentric is provided with; Bottom one side of inner drying tube is connected with the dry gas stream pipeline; The napex of inner drying tube is unobstructed opening, and this open end is provided with spacing with the closed top end of outer drying; Said inner drying tube is divided into approximate impartial two sections, and the hypomere diameter is less than the epimere diameter; Corresponding outer drying also is divided into approximate impartial two sections, and the hypomere diameter is less than the epimere diameter, and the lateral cross section between formed inner drying tube and the outer drying is long-pending, and epimere is greater than hypomere.

Simultaneously, make brokenly, guarantee the smooth motion herein of tobacco material, be equipped with a mild linkage section between the following two sections reducings of the inner drying tube of said drying tower and outer drying above that for reducing tobacco.

The top can be provided with the pyramid type deflector in the said outer drying, and the unobstructed opening on inner drying tube top and this pyramid type deflector are at a distance of about 80-100 centimetres.When tobacco is dished out under the effect of inner drying tube top at dry gas stream, can shed two sections area of space of urceolus and inner core through the pyramid type deflector, tobacco can obtain abundant drying, and can reduce tobacco as much as possible and make broken.

In addition; Said suction Venturi tube is set up perpendicular to ground; Its acute angle spray orifice directly is communicated with inner drying tube bottom; Omit connection Venturi tube commonly used in the existing pneumatic conveying drying tower and spend bend pipes with 90 of drying, the bump that can reduce tobacco is made broken, makes the dry gas stream regulation and control that more are easy to get simultaneously.

In addition, can confirm the height of said inside and outside drying, be generally 10 meters to 18 meters according to the concrete technological requirement of processing tobacco material.Simultaneously, the inner drying tube of said drying tower and outside between the drying, at the short transverse higher slice connecting rod is set, firmly the inner drying tube is fixing.

The utility model adopts the corresponding reducing design of drying tower inner/outer tube; The inner drying pipe is in short transverse; Two two sections approximate impartial diameters are up big and down small up and down, and the diameter that corresponds to outer drying also is set to up big and down small, and air-flow and the tobacco speed through zones of different the time is changed; Dry wind speed is slack-off by soon in the inner drying tube; Outreach when shedding outer drying then by accelerating slowly at tobacco, the tobacco that the is dried heat exchanger time dry in the reducing arid region is longer, drying is more abundant, satisfies the dry demand of high-moisture tobacco thereby reach.The utility model can effectively reduce the temperature of dry gas stream; Required dry air temperature is only between 160-220 ℃; Have energy-conservation, baking temperature is low, drying efficiency is high, tobacco is made broken characteristics such as little, can fully satisfy the technological requirement such as processing intensity and uniform drying property of high-moisture tobacco.

Description of drawings:

Fig. 1 is the utility model structural representation.

Among the figure: 1 ﹑ support; 2 ﹑ heat-insulation layers; 3 ﹑ dry-heat air blast pipes; 4 ﹑ charging jigging conveyers; 5 ﹑ charging gas locks; 6 ﹑ feed pipes; 7 ﹑ Venturi tubes; 8, hypomere inner core; 9 ﹑ transition inner cores; 10 ﹑ epimere inner cores; 11 ﹑ pyramid type deflectors; 12 ﹑ epimere urceolus; 13 ﹑ transition urceolus; 14 ﹑ hypomere urceolus; The outlet of 15 ﹑ gas material; 16 ﹑ connecting rods; 17 ﹑ annular water injector.

The specific embodiment:

As shown in Figure 1, the said novel tobacco dry materials of the utility model tower comprises support 1; It is the supporting of drying tower, and whole drying all has heat-insulation layer 2, is dry-heat air blast pipe 3 in the bottom of drying tower; Blast pipe is connected with Venturi tube 7, on the top of support 1 charging gas lock 5 is installed, and before its inlet, a jigging conveyer 4 is installed; Gas lock 5 outlets link to each other with feed pipe 6; The trunnion portion of Venturi tube 7 is connected with feed pipe 6, and Venturi tube 7 is connected in aggregates with hypomere inner core 8, transition inner core 9 and epimere inner core 10, and 10 outlets of epimere inner core face the pyramid type deflector 11 that is arranged on the urceolus cat head; Epimere urceolus 12 is connected one with transition urceolus 13 with hypomere urceolus 14, is gas material outlets 15 in the bottom of hypomere urceolus 14.Gas material outlet 15 can be connected with any gas material separating device.In order to keep distance and the stability of inner core between interior and the urceolus, between inner core and urceolus, connecting rod 16 is set at the short transverse higher slice.And also be provided with an annular water injector 17 in the conical end of pyramid type deflector 11.

As shown in Figure 1; The diameter of hypomere inner core 8 is less than epimere inner core 10, and simultaneously, the diameter of hypomere urceolus 14 is also less than the diameter of epimere urceolus 12; And the cross section that forms between hypomere inner core 8 and the hypomere urceolus 14 is less than the cross section that forms between epimere inner core 10 and the epimere urceolus 12.

The operation principle and the process of the utility model are following: the same with other pneumatic conveying dryer; At first equipment is through the preheating of dozens of minutes; After device systems arrives the condition that feeds intake, the tobacco of high-moisture to be dried will be transported to gas lock 5 through flow controlling unit by jigging conveyer 4, and tobacco gets into the moment of feed pipe 6 from gas lock 5; Temperature is that the negative pressure that 160-220 ℃ of high speed dry gas stream produces through Venturi tube 7 time just gets into its suction Venturi tube in the hypomere inner core 8 simultaneously; And rapidly through transition inner core 9 and epimere inner core 10, in this process, the movement velocity of tobacco relatively from fast to slow; This makes the time of tobacco and dry gas stream heat exchange longer relatively; When the pyramid type deflector 11 that outreaches, the reduction of speed also helps reducing the impact strength of tobacco and barrel, thereby making of reduction tobacco is broken.Tobacco is shed in epimere urceolus 12, transition urceolus 13 and the hypomere urceolus 14 inner core arid region corresponding with it through the guiding of pyramid type deflector 11; At this moment tobacco movement velocity relatively from slow to fast; Tobacco is once more after the sufficient heat exchange; Arrive outlet 15 fast, accomplish material gas through the gas material separating device and separate.

In the pneumatic conveying drying process, between inner core and urceolus, played the effect of firm inner core at the connecting rod 16 of short transverse layering setting.After accomplishing production task, use the annular water injector 17 on the pyramid type deflector 11 to spray clean water cleaning inner core, simultaneously, this annular water injector 17 also plays the effect of fire-fighting.In addition, equipment has good heat-insulation layer 2, can reduce the loss of heat, reduces energy resource consumption.

Claims (5)

1. high-moisture tobacco drying tower; Comprise charging vapour lock, suction Venturi tube and two inside and outside dryings that concentric is provided with; Bottom one side of inner drying tube is connected with the dry gas stream pipeline; The napex of inner drying tube is unobstructed opening, and this open end is provided with spacing with the closed top end of outer drying; It is characterized in that: said inner drying tube is divided into approximate impartial two sections, and the hypomere diameter is less than the epimere diameter; Corresponding outer drying also is divided into approximate impartial two sections, and the hypomere diameter is less than the epimere diameter, and the lateral cross section between formed inner drying tube and the outer drying is long-pending, and epimere is greater than hypomere.

2. according to the said high-moisture tobacco of claim 1 drying tower, it is characterized in that: be equipped with a mild linkage section between the following two sections reducings of the inner drying tube of said drying tower and outer drying above that.

3. according to the said high-moisture tobacco of claim 1 drying tower, it is characterized in that: the top is provided with the pyramid type deflector in the outer drying, and the unobstructed opening on inner drying tube top and this pyramid type deflector are at a distance of about 80-100 centimetres.

4. according to claim 1,2 or 3 said high-moisture tobacco drying towers, it is characterized in that: said suction Venturi tube is set up perpendicular to ground, and its acute angle spray orifice directly is communicated with inner drying tube bottom.

5. according to the said high-moisture tobacco of claim 4 drying tower, it is characterized in that: the inner drying tube of said drying tower and outside between the drying, at the short transverse higher slice connecting rod is set.

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