CN1151898C

CN1151898C - Method for sorting material in place

Info

Publication number: CN1151898C
Application number: CNB021380910A
Authority: CN
Inventors: 夏正林; 王训明
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-08-06
Filing date: 2002-08-06
Publication date: 2004-06-02
Anticipated expiration: 2022-08-06
Also published as: CN1394698A

Abstract

The present invention discloses a method for sorting materials on the spot and a device thereof, which is particularly suitable for sorting loose tobacco products. The method is carried out in a box which can blow transversely and vertically upwards. The box under a feed inlet provides transversal inlet air and vertical inlet air, and when materials freely fall after entering the box, the transversal air sorts the materials in a blowing mode, and the vertical air carries out flotation to the materials, so that heavy objects fall through an air inlet, and light objects fall into the box and are conveyed out by a conveying mechanism.

Description

A kind of method of sorting material in place

Technical field

The present invention relates to a kind of method and apparatus that bulk material is carried out sorting on the spot, be particularly useful for tobacco production line tobacco product is carried out the foreign matter sorting.

Background technology

As everyone knows in the tobacco production process, often be mixed with many foreign material in the tobacco product, as metal, stone etc., also can produce some foreign matters during these more external PROCESS FOR TREATMENT, separate as leaf stalk and in pipe tobacco, can produce stalk when clean and sign, expanded cut tobacco can produce caking etc. when producing, and these foreign matters can have a negative impact to the production process and the product quality of cigarette, therefore must adopt certain process that these foreign material are sorted out.

In the ordinary course of things, mostly adopt the method segregating foreign objects of in a casing, using flotation on the tobacco production line.Be that loose tobacco product is admitted in the air-flow that is in vertical pipe, its floating velocity difference of material according to different densities, tobacco leaf and stalk are separated, concrete grammar is as follows: tobacco stalk quality is big, wind area is little, its floating velocity is about 6 meter per seconds, and quality of tobacco is little, wind area is big, its floating velocity is about 1.5 meter per seconds, its principle as shown in Figure 1, by selecting uprush speed, make its less than the floating velocity of offal the floating velocity greater than tobacco leaf, offal freely falls in pipeline, tobacco leaf is then taken away by air-flow, and offal has just obtained effective the separation with tobacco leaf like this.Simultaneously, tobacco leaf is then taken to the appointed place by the air communication piping, has finished the strength conveying.

The method that above flotation and strength are carried has good separating effect, still, for the smaller tobacco product of moisture, as the pipe tobacco after the oven dry, can produce fragmentation to a certain degree in process of pneumatic transmission, and then influence cigarette quality.

Summary of the invention

The purpose of this invention is to provide grow tobacco a separation method and an equipment on the spot, the foreign matter that is used for the tobacco product production process separates, the technical method that uses the present invention to propose, can farthest reduce the fragmentation of tobacco product in the foreign matter separation process, thereby improve the product quality of cigarette, can reduce simultaneously the production cost of cigarette effectively, improve the economic benefit of tobacco productive corporation.

Realize that main technique methods of the present invention is: the present invention has adopted a casing, the direction casing provides transverse air-intake and vertical air intake under the charging aperture of casing, loose material is sent into when freely falling behind the casing, utilizing transverse air-intake with vertical air intake it to be waftd selects and the sorting of flotation secondary, by the secondary sorting, heavy object such as metal, offal etc. fall by vertical intake stack, and light object such as tobacco leaf, pipe tobacco etc. are sent casing by conveying mechanism.

At first, utilize transverse air-intake to the choosing of wafing of the tobacco product in falling.Vary in size according to separated object volume density difference and wind area, the different separation that obtain the different densities particle of the distance that separated object descends slowly and lightly under the horizontal air stream effect of certain wind speed, adjust the wind speed of transverse air-intake, to the choosing of wafing of separated object, owing to adopted the floating velocity of wind speed horizontal in the casing far below separated object, light object is sent casing after just freely falling after the sphere of action that breaks away from side air admission.

But the choosing of wafing can descend to some extent for the object separating effect that mass density and wind area are more or less the same, in order to guarantee separating effect, the object that adopts vertical air intake to select wafing carries out a flotation again, promptly when falling into vertically upward in the air intake zone, material that partial density and wind area are more or less the same utilize the difference of floating velocity to carry out flotation, the little material of mass density enters the choosing of wafing of beam wind zone once more under the effect of wind speed vertically upward, the light object that will mix is wherein selected.

The waft choosing and the acting in conjunction of flotation can improve the separation accuracy of object greatly, have guaranteed separating effect.

By adjusting transverse air-intake and the air quantity of vertical air intake and the size between the two, can produce different waft choosing and flotation effect, thereby go for different occasions, separate different materials.

Though in vertical intake stack, have than higher wind speed, but the cross section of vertical intake stack is much smaller than the cross section of casing, make the casing cross section keep suitable wind speed, the material of different densities of weight drops on the different parts in the casing, in whole process, except dust, material is not taken out of casing by air-flow, thereby has realized separating on the spot.

A kind of material sorting device for realizing that said method provides, it comprises casing, is provided with charging aperture, transverse air-intake mouth from top to bottom in a side of casing, in the bottom of casing vertical air inlet and drawing mechanism is arranged, and at the top of casing exhaust duct is arranged; The air register that can regulate the exhaust outlet size also is housed on exhaust duct; Vertical air inlet is positioned at charging one side of bottom half, and its best air-admitting surface is about 1/5 of casing cross-sectional area.

Advantage of the present invention and effect:

1, owing to adopted waft choosing and flotation, therefore has good separating effect.

Though 2 have adopted twice sorting, total gas consumption is less than traditional flotation, so energy consumption is low.

3, owing to realized separating on the spot, material is not carried out strength and carry, therefore little to the material injury, do not produce fragmentation.

4, floor space is little, flexibility good, can be used for the multiple occasion of tobacco production line more easily.

Description of drawings

Also further specify characteristics of the present invention in conjunction with the accompanying drawings below by specific embodiment.

Fig. 1 is the background technology schematic diagram;

Fig. 2 is a schematic diagram of the present invention;

Fig. 3 is a device structure schematic diagram of the present invention.

Among the figure: 1. vertical airduct, 2. side air admission mouth, 3. apparatus for feeding, 4. exhaust duct, 5. casing, 6. discharging equipment, 7. charging aperture, arrow is depicted as the flow direction of wind.

The specific embodiment

As shown in Figure 3, the present invention is made up of vertical blast pipe (1), side air admission mouth (2), apparatus for feeding (3), exhaust duct (4), casing (5), discharging equipment (6), charging aperture parts such as (7).

Elect example as with the pipe tobacco branch: contain the part stalk in the pipe tobacco after the oven dry and sign and other foreign material, these foreign material must be separated from pipe tobacco.This moment is because the moisture content of pipe tobacco is lower, so pipe tobacco is more crisp, and is broken easily.

The pipe tobacco that contains stalk label and other foreign material is sent into casing (5) by apparatus for feeding (3) through charging aperture (7), and does the movement of falling object in casing (5); To casing in provide beam wind by side air admission mouth (2) this moment, and pipe tobacco has produced drift under horizontal wind action, and the pipe tobacco that the part drift distance is bigger is directly dropping under the influence of inertia and gravity on the discharging equipment (6), is sent casing (5); Because the wind area of stalk label and pipe tobacco differs and is not very big, therefore beam wind can not be very big, this makes the part pipe tobacco be mingled in continuation whereabouts in stalk label and the foreign material, near vertical blast pipe (1), wind speed in the vertical blast pipe (1) is signed less than stalk greater than the floating velocity of pipe tobacco and the floating velocity of foreign material, stalk is signed and foreign material can pass vertical blast pipe (1), in casing (5), fall, pipe tobacco is then blown afloat by vertically-supplying air, laterally descending slowly and lightly to discharging equipment (6) under the wind action, take casing (5) out of by discharging equipment (6).

Owing to realized on the spot separating, and, therefore can not make pipe tobacco produce fragmentation carrying out flotation and wafing that pipe tobacco is not subjected to strong mechanical force when selecting.

In this process, exhaust duct (4) provides negative pressure for casing (5), and ash discharge, dedusting; On exhaust duct (4), arranged an air register,, thereby adjusted flotation effect with wind speed in the adjustment casing (5) and the wind speed in the vertical blast pipe (1); By regulating the aperture of transverse air-intake mouth (2), can adjust horizontal wind speed, select effect thereby adjust to waft.

Usually exhaust duct (4) sack cleaner or cyclone dust collectors direct and on the production line are connected, and provide institute's required airflow by deduster.

Claims

1, a kind of method of sorting material in place, in the casing that can laterally blow and blow vertically upward, carry out, at first loose material is in the process that falls, under the beam wind effect, separate the choosing of wafing with the wind area difference according to density, the material that density is big, wind area is little freely falls, and passes vertically upward and discharges casing behind the air intake zone; The material that density is little, wind area is big freely falls after the sphere of action that breaks away from beam wind with transverse air-intake drift forwards, is transferred mechanism and sends casing; The material that partial density and wind area are more or less the same utilizes the difference of floating velocity to carry out flotation in falling into vertically upward the air intake zone time, and the little material of mass density enters the choosing of wafing of the beam wind zone of action once more under the effect of wind speed vertically upward.

2, the method for sorting material in place according to claim 1 is characterized in that: Song Feng wind speed is signed less than stalk greater than the floating velocity of pipe tobacco and the floating velocity of foreign material vertically upward.

3, a kind of device of sorting material in place, it is characterized in that: it comprises casing (5), side at casing (5) is provided with charging aperture (7), transverse air-intake mouth (2) from top to bottom, and vertical blast pipe (1) and drawing mechanism (6) are arranged in the bottom of casing, and exhaust duct (4) is arranged at the top of casing.

4, sorting material in place device according to claim 3 is characterized in that: the air register that can regulate the exhaust outlet size also is housed on exhaust duct.

5, sorting material in place device according to claim 3 is characterized in that: vertical air inlet is positioned at charging one side of bottom half.

6, according to claim 3 or 5 described sorting material in place devices, it is characterized in that: the best area of vertical air inlet is 1/5 of a casing cross section.