CN102326858A - Roller type tobacco stalk continuous microwave expansion device - Google Patents

Abstract

A drum-type continuous microwave expansion device for tobacco stems, comprising a microwave source cavity (2) mounted on a frame (1), a material conveying roller (6) that passes through the middle of the microwave source cavity and can rotate along the axis ), the drum drive mechanism (23), the air-cooling system (26) arranged on the protective cover, and the fixed microwave suppression components (5, 5′) are set outside the material conveying drum and located at both ends of the microwave source cavity. The feed end and discharge end of the conveying drum are respectively connected to a fixed feed end cylinder (3) and a discharge end cylinder (10) through a rotary member (4), and the feed end cylinder is connected to the feed device (7). A discharge device (12) is connected to the lower part of the discharge end cylinder, and a dust collector (9) is also connected to the upper part of the discharge end cylinder; a protective cover (24) is placed on the microwave source cavity and the microwave suppression component. The invention can prepare tobacco stems with high puffing degree and low crushing rate, and further prepare shredded stems with good quality. It can meet the requirements of specialized, large-scale and continuous production.

Description

A drum type tobacco stem continuous microwave expansion equipment

technical field

The invention belongs to the technical field of microwave continuous expansion treatment equipment for expanding tobacco stems. the

Background technique

With the rapid development of the modern tobacco industry, the safety and economy of tobacco products have attracted more and more attention. The expanded shredded stems obtained after the tobacco stems are individually processed have increasingly prominent application value due to their outstanding advantages, mainly as follows: the expanded shredded stems can effectively reduce the tar content of cigarette products and improve the safety of cigarette products; After the treatment, the bitterness, spicy taste, irritation and miscellaneous gas of the tobacco stems are significantly reduced, and the quality of cigarette products is improved; the expanded shredded stems have a higher filling value, and adding them to the cigarette formula can greatly reduce costs and increase Corporate profits. Therefore, in the production process of shredded cigarettes, about 20% to 30% of tobacco stems need to be made into shredded tobacco stems and blended into shredded tobacco. Expanded tobacco stems have been widely used in the production of modern cigarettes, and their application prospects Vast, urgently need industrial production equipment to provide support. the

At present, my country's tobacco companies mainly use high-temperature and high-humidity processing technology to make cut stems, that is, to wet the tobacco stems under heating, then cut the tobacco stems into shreds, and then expand the shredded tobacco through the shredded tobacco flashing equipment. The existing cut stem production line mainly has three forms: one is the stem silk thread produced by HAUI Company in Germany, and its expansion equipment is composed of HT and vibrating trough drying machine; the other is the stem silk thread produced by British LEGG Company, and its expansion equipment is composed of super It is composed of a backtracking machine and a ring-type tobacco stem cutting machine; the third is the stem-making silk thread of the Italian COMAS company, and its expansion equipment is composed of a stem humidifier and an expansion tower. These tobacco stem processing equipment have a relatively low expansion degree, a high crushing rate, and a low utilization rate of the tobacco stem. the

Chinese published patent CN1387802A and Chinese published patent CN1387802 all disclose a kind of cut stem production process with microwave puffed tobacco stem technology as the core, "expanding first, then cutting, and restoring shape"; Chinese published patent CN1554293 discloses a tobacco shredded New process, wherein the puffing treatment of tobacco stems adopts microwave puffing; Chinese patent CN1518906A discloses a pretreatment method of tobacco stems mixed with microwave low-loss solid medium particle heat medium and treated with microwaves; Chinese patent CN101214086A discloses a The invention relates to a pretreatment method for tobacco stems which is pretreated by gas heat medium and treated with microwaves in a gas heat medium environment. However, what these patents disclose are all techniques or methods for microwave treatment of tobacco stems, and few mention the equipment technology for microwave puffing treatment of tobacco stems. Chinese published patent CN2607033Y discloses a multi-wave source and multi-feeder microwave expansion tobacco stem device, including a microwave magnetron, a driving power supply connected to the microwave magnetron, a heating box, a material inlet and outlet, and a suppression section on the inlet and outlet. A plurality of microwave magnetrons connected to the excitation chamber are arranged at the bottom of the heating box, and a preheating section is arranged at the rear end of the suppression section of the tobacco stem inlet; at the same time, a front end of the suppression section of the tobacco stem outlet is arranged. There is an insulation section. The device is essentially a conventional tunnel dryer used to expand tobacco stems, with low and uneven power density and poor expansion effect. Chinese published patent CN101214086A discloses a tobacco stem pretreatment method and equipment using the method through gas heat medium pretreatment and microwave treatment in the gas heat medium environment, the equipment includes gas heat medium preheating mechanism, microwave composite expansion processing agencies, etc. This patent mainly describes the method of pretreatment of tobacco stems, and only gives a conceptual description of its equipment, which is still a long way from industrial production application. the

The application of microwave puffed tobacco stems is severely restricted due to the lack of equipment and technology related to the microwave puffing of tobacco stems. the

Contents of the invention

The purpose of the present invention is to solve the deficiencies in the prior art, to provide a drum-type continuous microwave expansion equipment for tobacco stems that can meet the requirements of specialization, large-scale and continuous production. Tobacco stems with high and low crushing rate can be prepared to obtain cut stems with good quality. the

The purpose of the present invention is achieved through the following technical solutions. the

A drum-type continuous microwave expansion device for tobacco stems, including a microwave source cavity installed on a frame, a material conveying drum that passes through the middle of the microwave source cavity and can rotate along the axis, a drum driving mechanism, and a protective The air-cooling system on the cover is equipped with fixed microwave suppression components at both ends of the microwave source cavity outside the material delivery drum, and fixed feed ends are connected to the feed end and discharge end of the material delivery drum through rotary components. The barrel and the discharge end barrel, the feed end barrel is connected with the feeding device, the lower part of the discharge end barrel is connected with a discharge device, and the upper part of the discharge end barrel is also connected with a dust collector; the microwave source cavity and the microwave suppression component cover With protective cover. the

The microwave source cavity of the present invention is a positive odd polyhedral cylinder with an operation door on one side wall and at least two microwave feeding ports on the other side wall. The positive and odd polyhedral cylinders of the present invention are pentagonal cylinders, forming a polyhedral focusing type microwave resonant cavity composed of multi-tube low-power non-coherent power. the

The frame of the present invention is a triangular frame, the bottom corner of the triangular frame is installed on the base through a hinge shaft or a bolt, and a flat plate is installed on the surface opposite to the bottom corner, and the microwave source cavity, the drum driving mechanism, and the feeding device are all Installed on a flat plate; a push rod that can move up and down is connected to the bottom of one end of the flat plate. the

The material conveying roller of the present invention is installed in cooperation with the microwave source cavity through a sleeve sleeved on its outer surface; the microwave suppression member is sleeved on the sleeve; The annular reactive energy leakage suppressor on the sleeve, the annular resistive energy leakage suppressor composed of a wave-absorbing filler ring and the wave-absorbing sealing ring, and the ring-shaped reactive energy leakage suppressor and the annular resistive energy leakage suppressor The pressure sleeve outside the suppressor, the inner end side plate of the pressure sleeve and the outer end side plate of the microwave source cavity are fixedly connected through the connecting member; the annular reactive energy leakage suppressor, the annular resistive energy leakage suppressor and their pressure sleeves are composed Anti-microwave leakage structure; the anti-microwave leakage structure is connected with the microwave source cavity as a whole and fixed, and the material conveying roller rotates along the axis to form a rotary dynamic sealing structure. the

The material conveying roller of the present invention is arranged obliquely, and the inclination angle of its axis line relative to the horizontal plane is not more than 15 degrees, and a copying plate is installed on the inner wall of the material conveying roller. the

The feeding device of the present invention is a variable-pitch anti-blocking screw feeding conveying device, which is directly connected with the feeding end barrel, and the two ends of the shaft of the screw feeding conveying device are sealed with a graphite shaft sealing device. the

In the present invention, a synchronous mechanism is connected between two rotary components arranged at both ends of the material conveying roller, and the synchronous mechanism is connected with a driving mechanism. the

The protective cover of the present invention is an integral structure covering the cavity of the microwave source and the microwave suppression component, or is composed of an upper protective cover and a lower protective cover. the

The discharge device of the present invention is an all-metal micro-gap star-shaped rotary discharge device capable of preventing microwave leakage. the

The filler in the wave-absorbing filler ring of the present invention is silicon rubber sealing gasket or metal shielding net, and the sealing material of the wave-absorbing sealing ring is graphite or silicon rubber or pyramid foam. the

The present invention can fully adopt automatic control and is easy to operate. The microwave power density is high, the heating speed is fast, time and labor are saved, and energy consumption can be effectively reduced. The expansion rate and expansion uniformity of the produced tobacco stems are high, and high-quality shredded stems can be prepared. The continuous delivery of tobacco stems can be realized by using the material conveying drum, without intermittent emptying and feeding, the path of the tobacco stems before turning over in the drum is consistent, the absorption of microwave energy is consistent, the degree of material expansion is consistent, and the obtained expanded tobacco The stem expansion rate is high, the expansion uniformity is good, and the processing efficiency is high, which can meet the requirements of specialization, large-scale and continuous production. the

The microwave source cavity adopts a positive-odd multi-faceted cylindrical structure that is installed on one side wall and microwave feeding ports are uniformly opened on the other side wall, which can significantly improve the uniformity of microwave distribution and effectively reduce microwave dead angles. the

The frame structure of the triangular frame is adopted, and the flat plate of the frame is connected with the push rod, so that the height of the equipment and the inclination angle of the material conveying roller can be adjusted conveniently to meet the requirements of actual production. the

The rotary dynamic sealing structure adopts a combination structure of a reactive energy leakage suppressor and a resistive energy leakage suppressor. The reactive energy leakage suppressor can reflect most of the microwave energy back to the furnace cavity and perform a certain degree of microwave energy. The attenuation of the wave absorbing material ring and the wave absorbing sealing ring are combined into a resistive energy leakage suppressor and installed at the rear end of the reactive energy leakage suppressor, which can absorb the remaining microwave energy again. , to further play a better protective role, effectively control the microwave leakage, and prevent the microwave leakage of the rotary microwave drying equipment. The leakage is less than 0.5mW/cm ² required by the national standard, which can achieve the ideal protective effect.

Microwave synthesis adopts multi-tube low-power incoherent power synthesis polyhedral focusing technology, which can increase the microwave power density in the material area. the

The feeding device adopts the variable pitch anti-blocking screw feeding conveying device, which is directly connected with the drum body, and can smoothly realize the continuous conveying of materials. the

The material conveying drum adopts a downward-sloping placement method with a high feeding end and a low discharging end. A copy board is set inside the drum, which can make the processed tobacco stems roll down naturally due to gravity during the transportation process, and strengthen the tobacco stems. puffing effect. the

The content of the present invention will be further elaborated below in conjunction with the accompanying drawings. the

Description of drawings

Fig. 1 is the structural representation that protective cover of the present invention is in taking off state;

Fig. 2 is the front view of the protective cover of the present invention in the state of taking it off;

Fig. 3 is the left view of Fig. 2;

Fig. 4 is a structural schematic diagram of the present invention in the microwave suppression structure section;

Fig. 5 is the front view of microwave source cavity;

Fig. 6 is the left side view of Fig. 5;

Fig. 7 is a view from the direction A of Fig. 5 .

In the figure, 1-frame; 1a-plate; 2-microwave source cavity; 3-feed end cylinder; 4-revolving member; Material device; 8-microwave feeder; 9-dust collector; 10-discharging end cylinder; 11-operating door; 12-discharging device; 13-bolt; 14-base; 15-push rod; 16-sleeve; 17-reactive leakage energy suppressor; 18-absorbing filler ring; 19-absorbing sealing ring; 20-pressure sleeve; 21-connecting member; 22-synchronous mechanism; 23-roller driving mechanism; ; 25-lower protective cover; 26-air cooling system; 27-silo. the

Detailed ways

As shown in Fig. 1, Fig. 2 and Fig. 3, the present invention includes a microwave source cavity 2 installed on the frame 1, a protective cover covering the outside of the microwave source cavity, passing through the middle of the microwave source cavity transversely and along the The material conveying roller 6 rotating on the axis, the roller driving mechanism 23, and the air cooling system 26 arranged on the protective cover are equipped with fixed microwave suppression components 5, 5' at both ends of the microwave source cavity outside the material conveying roller 6, The feed end and discharge end of the material conveying drum are respectively connected with a fixed feed end cylinder 3 and a discharge end cylinder 10 through a rotary member 4, the feed end cylinder is connected with the feeding device 7, and the lower part of the discharge end cylinder is connected There is a discharge device 12, and a dust collector 9 is connected to the upper part of the discharge end cylinder, and a protective cover is placed on the microwave source cavity 2 and the microwave suppression components 5, 5'. The rotary member 4 is directly connected with the material conveying drum 6, which can realize the expansion of the tobacco stem in the rotary expansion treatment under the microwave environment. The material conveying drum 6 is made of wave-permeable macromolecule and its composite material or inorganic material, and a copy board is installed on the inner wall. Protective cover can adopt integral protective cover, but preferably adopts the structure that is combined by upper protective cover 24 and lower protective cover 25 as shown in the figure, has not only played protective effect, is convenient to disassembly and maintenance again. the

The microwave source cavity 2 is shown in Fig. 5, Fig. 6 and Fig. 7 as a positive odd polyhedral cylinder with multiple microwave feed ports 8 on the side wall of the cavity and an operation door 11 on one side wall. The microwave source cavity 2 in this embodiment is a pentagonal cylinder. An operation door 11 is equipped with on one side wall, and microwave feeding port 8 is offered on other four side walls. The number of microwave feed ports distributed on each side wall is set according to the power level, and the number of microwave feed ports is generally set to 12 to 16. The microwave source adopts multi-tube low-power (2450MHz) non-coherent power synthesis polyhedron focusing microwave resonator technology. Microwave power density in the material area inside the applicator cavity. The microwave feeding port 8 is a rectangular port, including but not limited to the form in the national standard BJ22-26. The microwave source cavity 2 is welded by metal material plates, and can also be formed by other methods. The metal materials can be selected from 304# stainless steel, 316# stainless steel, copper plates, aluminum plates, or metal materials commonly used in other industries. In order to improve the rigidity and anti-corrosion performance of the microwave source cavity. The four-sided microwave arrangement of the pentagonal cylinder of the microwave source cavity 2 is significantly improved compared to the three-sided microwave arrangement of the tetrahedron, which can effectively reduce microwave dead angles. the

The frame 1 is a triangular frame with one corner downward as the bottom corner. The bottom corner of the triangular frame is installed on the base 14 through hinge shafts or bolts 13, and a flat plate 1a is installed on the surface opposite to the bottom corner. The microwave source cavity 2. The drum driving mechanism 23 and the feeding device 7 are all installed on the flat plate; a push rod 15 that can move up and down is connected to the bottom of one end of the flat plate. The push rod can be an electric push rod or a hydraulic push rod to drive the hydraulic push rod. The hydraulic mechanism of the rod can be mounted on the base 14 . the

As shown in Figure 4, the material conveying roller 6 is installed in cooperation with the microwave source cavity 2 through the sleeve 16 sleeved on its outer surface; the microwave suppression components 5, 5' are sleeved on the sleeve 16; the microwave suppression components include An annular reactive energy leakage suppressor 17 that is sequentially fitted on the sleeve in the axial direction of the material conveying roller from the inside to the outside, an annular resistive energy leakage suppressor composed of a wave-absorbing filler ring 18 and a wave-absorbing sealing ring 19, and a set On the pressure sleeve 20 outside the annular reactive energy leakage suppressor and the annular resistive energy leakage suppressor, the inner end side plate of the pressure sleeve is fixedly connected with the outer end side plate of the microwave source cavity 2 through the coupling member 21 . The outer end side plates of the pressure sleeves on both sides are respectively connected with the feed end cylinder and the discharge end cylinder through connecting pieces. The annular reactive energy leakage suppressor, the annular resistive energy leakage suppressor and their pressure sleeve 20 constitute an anti-microwave leakage structure; the anti-microwave leakage structure is connected with the microwave source cavity 2 as a whole and is fixed, and the material conveying roller 6 is fixed along the axis The line rotates to form a rotary dynamic seal structure. The filler in the wave-absorbing packing material ring 18 is a silicone rubber gasket or metal shielding net, and the sealing material of the wave-absorbing sealing ring 19 is graphite or silicon rubber or pyramid foam. the

The material conveying roller 6 is arranged obliquely, and the inclination angle of its axis line relative to the horizontal plane is not more than 15 degrees. Microwave synthesis adopts multi-tube low-power non-coherent power synthesis polyhedral focusing technology. The feeding device 7 adopts a variable-pitch anti-blocking screw feeding conveying device, which is directly connected with the feeding end cylinder 3 and can continuously convey materials. Both ends of the shaft of the screw feeding conveying device are sealed with a graphite shaft sealing device, which can realize continuous conveying of materials and electrical sealing. the

The material conveying drum is connected with the rotary member to form a rotary drum body, and the double-end synchronous transmission is realized through the synchronous mechanism, which can realize the rotary expansion treatment of the tobacco stem expansion in the microwave environment, and effectively improve the product quality. the

The feeding device 7, the feeding end cylinder 3, the material conveying drum 6, the rotary member 4, the microwave suppression structure 5, 5', the microwave source cavity 2, and the discharger 12 of the present invention are connected together to form a microwave airtight application system , to provide protection for the full use of microwave energy, electromagnetic compatibility and labor safety. The feeding device 7, the material conveying drum 6, the rotary member 4, the microwave suppression structure 5, 5', and the discharger 12 are connected to each other to form an airtight application system, which realizes the formation of the gas heat medium environment and the recovery and utilization of the gas heat medium and energy saving. the

When working, the roller driving mechanism 23 starts to drive the material conveying roller 6 to rotate. The feeding device 7 takes the tobacco stem material from the silo 27 and delivers it to the feeding end cylinder, and then enters the material delivery drum 6 . The tobacco stems are transported by the rotary motion of the material conveying drum 6. In the inclined material conveying roller, the tobacco stems are continuously turned by the action of gravity and the movement of the copying board. During the transmission process, the tobacco stems are dried and expanded under the action of the microwave field emitted by the microwave source in the microwave source cavity 2 , and then enter the discharge end cylinder 10 , and then fall into the discharge container 12 . The dust generated during the tobacco stem transportation and drying expansion process is discharged after being processed by the dust collector 9 . the

Claims (10)

1. drum-type offal continuous microwave expansion equipment; It is characterized in that; Comprise the microwave source cavity (2) that is installed on the frame (1), from microwave source cavity intermediate lateral pass and can be along mass transport cylinder (6), the drum drive (23) of axle center rotation, be arranged at the air cooling system (26) on the protective cover; Outside mass transport cylinder (6), be positioned at microwave source cavity two ends and be set with fixing microwave inhibition member (5,5 '); Feed end and discharge end at the mass transport cylinder are connected with fixing feed end tube (3) and discharge end tube (10) through revolving member (4) respectively; The feed end tube is connected with feed arrangement (7), and discharge end tube bottom is connected with discharger (12), also is connected with deduster (9) on discharge end tube top; Be covered with protective cover (24) at microwave source cavity (2) and microwave inhibition member (5,5 ').

2. a kind of drum-type offal continuous microwave expansion equipment according to claim 1; It is characterized in that said microwave source cavity (2) is for being equipped with actuating doors (11), offering the positive odd number multi-faceted column that at least two microwaves are presented mouthful (8) at other sidewall at a sidewall.

3. a kind of drum-type offal continuous microwave expansion equipment according to claim 2 is characterized in that said positive odd number multi-faceted column is the pentagon cylinder, has formed the synthetic focusing microwave cavity of polyhedron of multitube small-power non-coherent power.

4. a kind of drum-type offal continuous microwave expansion equipment according to claim 1; It is characterized in that; Said frame (1) is a spandrel frame; The base angle of spandrel frame is installed on the base (14) through hinge or bolt (13), and a flat board (1a) is installed on the face relative with the base angle, and microwave source cavity (2), drum drive (23), feed arrangement (7) all are installed on the flat board; Be connected with the push rod (15) that can move up and down in a dull and stereotyped bottom portion.

5. a kind of drum-type offal continuous microwave expansion equipment according to claim 1 is characterized in that mass transport cylinder (6) cooperates installation through the sleeve (16) that is enclosed within its outer surface with microwave source cavity (2); Microwave suppresses member (5,5 ') and is sleeved on the sleeve (16); Said microwave suppress member comprise along the mass transport drum shaft to from inside to outside be sleeved on successively annular electro resistance on the sleeve leak can TVS (17), by inhale ripple inserts ring (18) with inhale the resistive leakage of annular electro that Bomi seal (19) constitutes can TVS and be sleeved on that the annular electro resistance leaks can TVS and the gland (20) of the resistive leakage of annular electro outside can TVS, the inner side plate of gland is fixedly connected through coupling member (21) with the outer end side plate of microwave source cavity (2); The annular electro resistance is leaked ability TVS and the resistive leakage ability TVS of annular electro and gland (20) thereof and is constituted the anti-microwave leakage structure; Anti-microwave leakage structure and microwave source cavity (2) are connected as one fixed, and mass transport cylinder (6) is formed rotary movable sealing structure along the axial line rotation.

6. a kind of drum-type offal continuous microwave expansion equipment according to claim 1; It is characterized in that; Mass transport cylinder (6) is obliquely installed, and its axial line angle of inclination with respect to the horizontal plane is not more than 15 degree, at mass transport cylinder (6) inwall copy plate is installed.

7. a kind of drum-type offal continuous microwave expansion equipment according to claim 1; It is characterized in that; Said feed arrangement (7) is a varying pitch block-resistant type spiral charging transport; Directly be connected with feed end tube (3), the sealing of graphite shaft sealing device is adopted at the axle two ends of spiral charging transport.

8. a kind of drum-type offal continuous microwave expansion equipment according to claim 1 is characterized in that, is connected with lazy-tongs (22) being arranged between two revolving members (4) at mass transport cylinder two ends, and lazy-tongs connect with drum drive (23).

9. a kind of drum-type offal continuous microwave expansion equipment according to claim 1 is characterized in that, said discharger (12) is for preventing the all-metal microgap star rotary discharger of microwave leakage.

10. a kind of drum-type offal continuous microwave expansion equipment according to claim 5; It is characterized in that; Filler in inhaling ripple inserts ring (18) is silicone rubber seal pad or metallic shield net, and the encapsulant of inhaling Bomi seal (19) is graphite or silicon rubber or pyramid formula foam.

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