CN220512205U - System for eliminating bubbles of reconstituted tobacco by thick slurry method special for heating cigarettes - Google Patents

Abstract

The utility model belongs to the technical field of reconstituted tobacco production and processing, and particularly relates to a system for eliminating bubbles of reconstituted tobacco by a thick slurry method special for heating cigarettes. The system for eliminating the bubbles of the reconstituted tobacco by the thick slurry method special for heating the cigarettes comprises an adhesive adding device, a pulverizer, a powder homogenizing bin, a homogenizing mixer, a thick slurry preparation tank, a defoaming and buffering integrated tank, a first three-way valve, a second three-way valve, a first vacuumizing device and a second vacuumizing device. The utility model adopts a three-level bubble control elimination method, which gradually eliminates the generated bubbles of thick slurry while reducing the bubble generation in the thick slurry, ensures the quality of thick slurry and reconstituted tobacco after molding and drying, and improves the strength, the processing resistance and the quality stability of heated cigarette products. The system has the advantages of simple structure, high reliability, convenient operation, capability of rapidly eliminating bubbles in thick slurry, and good process adaptability and popularization significance.

Description

System for eliminating bubbles of reconstituted tobacco by thick slurry method special for heating cigarettes

Technical Field

The utility model belongs to the technical field of reconstituted tobacco production and processing, and particularly relates to a system for eliminating bubbles of reconstituted tobacco by a thick slurry method special for heating cigarettes.

Background

The heated cigarette is a novel tobacco product, and the tobacco core material is heated by an external heat source, so that atomized media, aroma components and additional aroma in the tobacco core material volatilize to generate smoke similar to the smoke burnt by the traditional cigarette, and compared with the traditional cigarette, the reduction of most harmful components in the smoke of the heated cigarette reaches more than 90%. The reported methods for heating the tobacco core material of the cigarette mainly comprise four types of reconstituted tobacco by a papermaking method, a dry method, a thick slurry method and a rolling method.

The production process of thick slurry method tobacco core material is that after the tobacco is crushed into tobacco powder, the fiber, the adhesive, the water and the atomizing agent are added to mix and stir into the thick slurry of the tobacco powder, and then the thick slurry is poured into a steel belt for tape casting and shaping, and the special thick slurry method reconstituted tobacco for heating cigarettes is produced after drying. The adhesive is used as a key raw material of thick slurry method and rolling method technology, and determines the final forming quality of the reconstituted tobacco product special for heating cigarettes. However, the types of binders generally used mainly include natural pectin, guar gum, starch, cellulose (sodium carboxymethyl cellulose, etc.), etc., when the binder is used, the binder needs to be dissolved in advance or mixed with a certain concentration of added fiber, fumigant, water, perfume, etc. to form a feed liquid, in order to ensure that the binder is uniformly dissolved, a long stirring time is generally required, in addition, the binder is prepared into a liquid, the viscosity is high, a large number of bubbles are generated in the stirring and dissolving process, and the bubbles cannot be dissipated by themselves in the subsequent process of uniformly mixing the feed liquid with the smoke powder. Simultaneously, the feed liquid and the tobacco powder are further stirred and mixed at a high speed, and more new bubbles can be generated. The thick slurry has high viscosity and poor fluidity, and internal bubbles are difficult to rise to the liquid level to break and eliminate automatically, so that the thick slurry is cast on a steel belt to be molded and dried, and the peeled reconstituted tobacco contains a large number of holes, so that the local strength of the reconstituted tobacco is reduced, and the subsequent processing performance is influenced; and the existence of a large number of holes can change the density of the core material, deteriorate the heat conductivity and cause the fluctuation of the product quality.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model provides a special thick slurry method reconstituted tobacco bubble elimination system for heating cigarettes, which adopts a three-stage bubble control elimination method, reduces the generation of bubbles in thick slurry, gradually eliminates the generated thick slurry bubbles, ensures the quality of thick slurry and reconstituted tobacco after molding and drying, and improves the strength, the processing resistance and the quality stability of heated cigarette products.

Based on the above purpose, the utility model adopts the following technical scheme:

the system comprises an adhesive adding device, a pulverizer, a powder homogenizing bin, a homogenizing mixer, a thick slurry preparation tank, a defoaming and buffering integrated tank, a first three-way valve, a second three-way valve, a first vacuumizing device and a second vacuumizing device;

the side wall of the pulverizer is provided with a first feeding pipe, the side wall of the first feeding pipe is provided with an adhesive adding port, and the output end of the adhesive adding device is communicated with the adhesive adding port through a pipeline; the top end of the pulverizer is provided with a first discharging pipe;

the top end of the powder homogenizing bin is provided with a second feeding hole, and the bottom end of the powder homogenizing bin is provided with a second discharging hole; the first discharging pipe is communicated with the second feeding port through a pipeline;

the top end of the homogenizing mixer is provided with a third feed inlet, a fourth feed inlet and a fifth feed inlet, and the side wall of the homogenizing mixer is provided with a third discharge outlet; the second discharge port is communicated with the third feed port through a pipeline; the third feeding port is a mixed powder inlet, and the fourth feeding port is a mixed liquid inlet;

the top end of the thick slurry preparation tank is provided with a sixth feed inlet and a first extraction opening, and the bottom end of the thick slurry preparation tank is provided with a fourth discharge opening; the third discharge port is communicated with the sixth feed port through a pipeline;

a seventh feed port, an eighth feed port and a second extraction port are formed in the top end of the defoaming and buffering integrated tank, and a fifth discharge port is formed in the bottom end of the defoaming and buffering integrated tank;

the first three-way valve is provided with a first inlet end, a first outlet end and a first reflux end, the fourth discharge port is communicated with the first inlet end of the first three-way valve through a pipeline, the first outlet end of the first three-way valve is communicated with the seventh feed port through a pipeline, and the first reflux end of the first three-way valve is communicated with the fifth feed port through a pipeline;

the second three-way valve is provided with a second inlet end, a second outlet end and a second reflux end, the fifth discharge port is communicated with the second inlet end of the second three-way valve through a pipeline, and the second reflux end of the second three-way valve is communicated with the eighth feed port through a pipeline.

Further, a crushing roller which is horizontally arranged is arranged in the crusher, the shaft end of the crushing roller extends out of the crusher, and the shaft end of the crushing roller is connected with a first working motor.

Further, a turnover roller which is horizontally arranged is arranged in the powder homogenizing bin, and the shaft end of the turnover roller is connected with a second working motor.

It is further preferred that the powder homogenizing bin is disposed at a position higher than the homogenizing mixer in order to facilitate feeding of the powder homogenizing bin to the homogenizing mixer during actual production processing.

Further, be equipped with the first (mixing) shaft of vertical setting in the homogeneity blender, the axle head of first (mixing) shaft is connected with the third work motor, is equipped with first stirring leaf on the first (mixing) shaft.

Further, a second stirring shaft which is vertically arranged is arranged in the thick paste preparation tank, the shaft end of the second stirring shaft is connected with a fourth working motor, and a second stirring blade is arranged on the second stirring shaft.

Further, the first vacuumizing device comprises a first air extraction valve, a first vacuum pump and a first vacuum gauge; the air extraction end of the first vacuum pump is communicated with the first air extraction opening through a first air extraction pipe, the first air extraction valve is arranged at the joint of the first air extraction opening and the first air extraction pipe, the first air extraction valve is provided with a first signal receiving end, and the first vacuum pump is provided with a second signal receiving end;

the pressure sensing end of the first vacuum gauge stretches into the thick paste preparation tank, the first vacuum gauge is provided with a first signal transmitting end and a second signal transmitting end, the first signal transmitting end is electrically connected with the first signal receiving end, and the second signal transmitting end is electrically connected with the second signal receiving end;

the first vacuum gauge is provided with a threshold value, the pressure sensing end of the first vacuum gauge senses the negative pressure in the thick slurry preparation tank in the operation process of the thick slurry preparation tank, when the pressure sensing end of the first vacuum gauge senses that the negative pressure in the thick slurry preparation tank is lower than the threshold value, the first signal transmitting end transmits an opening signal to the first signal receiving end, at the moment, the first extraction valve is opened, meanwhile, the second signal transmitting end transmits an opening signal to the second signal receiving end, the first vacuum pump is started, and the first vacuum pump is utilized to vacuumize the thick slurry preparation tank; when the pressure sensing end of the first vacuum gauge senses that the negative pressure in the thick paste preparation tank reaches a threshold value, a closing signal is sent to the first signal receiving end through the first signal sending end, the first extraction valve is closed, meanwhile, a closing signal is sent to the second signal receiving end through the second signal sending end, and the first vacuum pump is closed;

the electrical connection modes of the first signal sending end, the first signal receiving end, the second signal sending end and the second signal receiving end are conventional in the prior art, and are not the utility model, so that the description is omitted.

Further, a third stirring shaft which is vertically arranged is arranged in the defoaming and buffering integrated tank, and the shaft end of the third stirring shaft is connected with a fifth working motor.

Further, a first screen frame and a second screen frame are arranged on the third stirring shaft.

Preferably, the first screen frame is located above the second screen frame; the top cap of defoaming buffer memory integrative jar is equipped with downwardly extending's annular section of thick bamboo, and annular section of thick bamboo bottom opening, first reel are located annular section of thick bamboo inboard.

It is further preferred that the bottom end of the annular cylinder is lower than the bottom end (5-10) cm of the first screen frame and lower than the top end (3-5) cm of the second screen frame.

Further, the second vacuumizing device comprises a second air extraction valve, a second vacuum pump and a second vacuum gauge; the air extraction end of the second vacuum pump is communicated with the second air extraction opening through a second air extraction pipe, the second air extraction valve is arranged at the joint of the second air extraction opening and the second air extraction pipe, the second air extraction valve is provided with a third signal receiving end, and the second vacuum pump is provided with a fourth signal receiving end;

the pressure sensing end of the second vacuum meter extends into the defoaming and buffering integrated tank, the second vacuum meter is provided with a third signal transmitting end and a fourth signal transmitting end, the third signal transmitting end is electrically connected with the third signal receiving end, and the fourth signal transmitting end is electrically connected with the fourth signal receiving end;

the second vacuum meter is provided with a threshold value, the pressure sensing end of the second vacuum meter senses the negative pressure in the defoaming and buffering integrated tank in the operation process of the defoaming and buffering integrated tank, when the pressure sensing end of the second vacuum meter senses that the negative pressure in the defoaming and buffering integrated tank is lower than the threshold value, the third signal transmitting end transmits an opening signal to the third signal receiving end, at the moment, the second extraction valve is opened, and simultaneously, the fourth signal transmitting end transmits an opening signal to the fourth signal receiving end, the second vacuum pump is started, and the second vacuum pump is utilized to vacuumize the defoaming and buffering integrated tank; when the negative pressure in the pressure sensing end induction defoaming and buffering integrated tank of the second vacuum meter reaches a threshold value, a closing signal is sent to a third signal receiving end through a third signal sending end, the second extraction valve is closed, a closing signal is sent to a fourth signal receiving end through a fourth signal sending end, and the second vacuum pump is closed;

the third signal transmitting end, the third signal receiving end, the fourth signal transmitting end and the fourth signal receiving end are electrically connected in a conventional manner in the prior art, and are not the utility model, so that the description is omitted.

Further, a first discharge valve is arranged at the fourth discharge port, and a first discharge pump is arranged on a pipeline connected with the first three-way valve at the fourth discharge port.

Further, a second discharge valve is arranged at the fifth discharge port, and a second discharge pump is arranged on a pipeline connected with the fifth discharge port and the second three-way valve.

Further, the first inlet end, the first outlet end and the first return end of the first three-way valve may be opened or closed separately, respectively, and the second inlet end, the second outlet end and the second return end of the second three-way valve may be opened or closed separately, respectively.

Further, based on a general inventive concept, the utility model also provides a method for eliminating bubbles of reconstituted tobacco by a thick slurry method special for heating cigarettes, which comprises the following steps:

1) Crushing and mixing the tobacco fragments and the adhesive in a crusher according to the proportion, and homogenizing and temporarily storing the obtained mixed powder in a powder homogenizing bin;

2) The mixed powder and the mixed liquid material enter a homogenizing mixer according to the proportion, thick slurry is obtained through full mixing, and meanwhile, the first-stage bubble control of the thick slurry is realized;

3) The thick slurry enters a thick slurry preparation tank, and is circularly mixed between a homogenizing mixer and the thick slurry preparation tank, and in the mixing process, the thick slurry reaches a set vacuum degree under the action of a first vacuumizing device, so that no air is mixed in the thick slurry during the circular mixing of the thick slurry, and the second-stage bubble control of the thick slurry is realized;

4) The thick slurry enters an integrated defoaming and buffering tank after being circularly mixed, two-stage centrifugal circulation defoaming treatment is carried out in the integrated defoaming and buffering tank, the thick slurry reaches a set vacuum degree under the action of a second vacuumizing device, and vacuum circulation defoaming treatment is carried out, so that third-stage bubble control of the thick slurry is realized; and conveying the thick slurry subjected to defoaming treatment to a tape casting forming process.

Specifically, in the step 3), the circulation mixing time is (30-60) min; the working vacuum degree of the first vacuumizing device is (30-50) kPa.

Specifically, in the step 4), the circulating defoaming time is (20-40) min; the working vacuum degree of the second vacuumizing device is (40-60) kPa.

Specifically, in step 4), the main process of the two-stage centrifugal circulation defoaming treatment is as follows: thick slurry entering the defoaming and buffering integrated tank is rapidly thrown to the surface of the annular cylinder under the action of centrifugal force through a first screen frame rotating at a high speed, so that first-stage centrifugal defoaming treatment is realized, thick slurry flows into a second screen frame rotating at a high speed through the surface of the annular cylinder, and is rapidly thrown to the inner wall of the defoaming and buffering integrated tank body again under the action of centrifugal force, so that second-stage centrifugal defoaming treatment is realized.

Compared with the prior art, the utility model has the beneficial effects that:

according to the utility model, the adhesive is added at the inlet of the pulverizer, the adhesive is dissolved in the homogenizing mixer, compared with the traditional process (the adhesive is added in the preparation process of mixed liquid materials), the dissolving position of the adhesive is moved backwards, a large number of bubbles are avoided in the preparation process of the liquid materials, and meanwhile, the bubbles generated in thick slurry can be eliminated step by arranging the bubble control structure in the thick slurry preparation tank and the defoaming and buffering integrated tank, so that the thick slurry and the quality of reconstituted tobacco after molding and drying are ensured, and the strength, the processing resistance and the quality stability of heated cigarette products are improved.

The system provided by the utility model has the advantages of simple structure, high reliability and convenience in operation, can reduce the generation of bubbles in thick slurry, can effectively eliminate the bubbles in thick slurry, and has good process adaptability and popularization significance.

Drawings

FIG. 1 is a schematic diagram of a system for eliminating bubbles in reconstituted tobacco by a thick slurry method special for heating cigarettes in example 1;

wherein: 1. the device comprises a pulverizer, 2, a powder homogenizing bin, 3, a homogenizing mixer, 4, a thick liquid preparation tank, 5, a defoaming and buffering integrated tank, 6, a first three-way valve, 7, a second three-way valve, 11, a first feeding pipe, 12, a first working motor, 13, a first discharging pipe, 21, a second working motor, 31, a third feeding port, 32, a fourth feeding port, 33, a fifth feeding port, 34, a third discharging port, 35, a third working motor, 41, a sixth feeding port, 42, a fourth working motor, 43, a first extraction valve, 44, a first vacuum pump, 45, a first vacuum gauge, 51, a seventh feeding port, 52, an eighth feeding port, 53, a fifth working motor, 54, a first screen frame, 55, a second screen frame, 56, an annular cylinder, 57, a second extraction valve, 58, a second vacuum pump, 59, a second vacuum gauge, 61, a first discharging valve, 62, a first discharging pump, 71, a second discharging valve, 72 and a second discharging pump.

Detailed Description

For an understanding of the present utility model, reference will now be made in detail to the present utility model, examples of which are illustrated in the accompanying drawings and described in the preferred embodiments, but the scope of the utility model is not limited to the specific embodiments.

Unless defined otherwise, all technical and scientific terms used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the scope of the present utility model.

Unless otherwise specifically indicated, the various raw materials, reagents, instruments, equipment and the like used in the present utility model are commercially available or may be prepared by existing methods.

Example 1

As shown in fig. 1, the system for eliminating bubbles of reconstituted tobacco by a thick slurry method special for heating cigarettes comprises an adhesive adding device (not shown in the figure), a pulverizer 1, a powder homogenizing bin 2, a homogenizing mixer 3, a thick slurry preparation tank 4, a defoaming and buffering integrated tank 5, a first three-way valve 6, a second three-way valve 7, a first vacuumizing device and a second vacuumizing device;

the right side wall of the pulverizer 1 is provided with a first feeding pipe 11, the first feeding pipe 11 is used for adding tobacco fragments and forming powder in the pulverizer 1, the side wall of the first feeding pipe 11 is provided with an adhesive adding port, and the output end of the adhesive adding device is communicated with the adhesive adding port through a pipeline;

the pulverizer 1 is internally provided with a horizontally arranged pulverizing roller, the shaft end of the pulverizing roller extends out of the pulverizer to the left, and the shaft end of the pulverizing roller is connected with a first working motor 12, and the axial center line of the first feeding pipe 11 is parallel to the axial center line of the pulverizing roller in the embodiment; the top end of the pulverizer 1 is provided with a first discharging pipe 13;

the top end of the powder homogenizing bin 2 is provided with a second feeding hole, and the bottom end of the powder homogenizing bin is provided with a second discharging hole; a turnover roller which is horizontally arranged is arranged in the powder homogenizing bin 2, and the shaft end of the turnover roller is connected with a second working motor 21; the first discharging pipe 13 is communicated with the second feeding port through a pipeline;

in the actual production and processing process, in order to facilitate the feeding of the powder homogenizing bin 2 to the homogenizing mixer 3, the powder homogenizing bin 2 is arranged at a position higher than the homogenizing mixer 3, specifically, in this embodiment, other devices in the system for eliminating bubbles of reconstituted tobacco by the thick slurry method special for heating cigarettes are arranged on the horizontal ground (0 m), and the powder homogenizing bin 2 is arranged on the two-layer ground (6 m height) of a factory building.

The top end of the homogenizing mixer 3 is provided with a third feeding port 31, a fourth feeding port 32 and a fifth feeding port 33, and the side wall of the homogenizing mixer 3 is provided with a third discharging port 34; the second discharge port is communicated with the third feed port 31 through a pipeline; the third feeding port 31 is a mixed powder inlet, and the fourth feeding port 32 is a mixed liquid inlet; the homogenizing mixer 3 is internally provided with a first stirring shaft which is vertically arranged, the shaft end of the first stirring shaft is connected with a third working motor 35, and a first stirring blade (not marked in the figure) is arranged on the first stirring shaft.

The top end of the thick paste preparation tank 4 is provided with a sixth feed inlet 41 and a first extraction opening, and the bottom end of the thick paste preparation tank 4 is provided with a fourth discharge opening; the third discharge port 34 is communicated with the sixth feed port 41 through a pipeline; a second stirring shaft which is vertically arranged is arranged in the thick paste preparation tank 4, the shaft end of the second stirring shaft is connected with a fourth working motor 42, and a second stirring blade is arranged on the second stirring shaft;

the first vacuumizing device comprises a first air extracting valve 43, a first vacuum pump 44 and a first vacuum gauge 45; the air extraction end of the first vacuum pump 44 is communicated with the first air extraction opening through a first air extraction pipe, the first air extraction valve 43 is arranged at the joint of the first air extraction opening and the first air extraction pipe, the first air extraction valve 43 is provided with a first signal receiving end, and the first vacuum pump 44 is provided with a second signal receiving end;

the pressure sensing end of the first vacuum gauge 45 stretches into the thick paste preparation tank 4, the first vacuum gauge 45 is provided with a first signal sending end and a second signal sending end, the first signal sending end is electrically connected with the first signal receiving end, and the second signal sending end is electrically connected with the second signal receiving end;

the first vacuum gauge 45 is set with a threshold value, during the operation of the thick slurry preparation tank 4, the pressure sensing end of the first vacuum gauge 45 senses the negative pressure in the thick slurry preparation tank 4, when the pressure sensing end of the first vacuum gauge 45 senses that the negative pressure in the thick slurry preparation tank 4 is lower than the threshold value, the first signal sending end sends an opening signal to the first signal receiving end, at the moment, the first extraction valve 43 is opened, and simultaneously, the second signal sending end sends an opening signal to the second signal receiving end, the first vacuum pump 44 is started, and the first vacuum pump 44 is utilized to vacuumize the thick slurry preparation tank 4; when the negative pressure in the thick paste preparation tank 4 sensed by the pressure sensing end of the first vacuum gauge 45 reaches a threshold value, a closing signal is sent to the first signal receiving end through the first signal sending end, the first extraction valve 43 is closed, meanwhile, a closing signal is sent to the second signal receiving end through the second signal sending end, and the first vacuum pump 44 is closed;

the electrical connection modes of the first signal sending end, the first signal receiving end, the second signal sending end and the second signal receiving end are conventional in the prior art, and are not the utility model, so that the description is omitted;

the top end of the defoaming and buffering integrated tank 5 is provided with a seventh feeding port 51, an eighth feeding port 52 and a second extraction port, and the bottom end of the defoaming and buffering integrated tank 5 is provided with a fifth discharging port; a third stirring shaft which is vertically arranged is arranged in the defoaming and buffering integrated tank 5, and the shaft end of the third stirring shaft is connected with a fifth working motor 53;

the third stirring shaft is provided with a first screen frame 54 and a second screen frame 55, and preferably, the first screen frame 54 is positioned above the second screen frame 55; the top cover of the defoaming and buffering integrated tank 5 is provided with a downwardly extending annular cylinder 56, the bottom end of the annular cylinder 56 is opened, and the first screen frame 54 is positioned at the inner side of the annular cylinder 56; preferably, the bottom end of the annular cylinder 56 is lower than the bottom end (5-10) cm of the first screen frame 54 and lower than the top end (3-5) cm of the second screen frame 55.

The first screen frame 54, the second screen frame 55 are all rotatable structures with slits all around, specifically, the first screen frame 54 and the second screen frame 55 are formed by encircling a round bottom frame and an annular side frame, wherein the area of the bottom frame of the second screen frame 55 is larger than that of the bottom frame of the first screen frame 54, slits are formed around the front, the back, the left and the right of the side frame of the first screen frame 54 and the second screen frame 55, the slit width of the first screen frame 54 is 0.85mm, the slit width of the second screen frame 55 is 0.65mm, the rotation speed of the first screen frame 54 and the second screen frame 55 is adjusted by controlling the frequency of the fifth working motor 53, in addition, the first screen frame 54 and the second screen frame 55 can be formed by encircling square bottom frames and a plurality of square side frames.

The second vacuumizing device comprises a second air extraction valve 57, a second vacuum pump 58 and a second vacuum gauge 59; the air extraction end of the second vacuum pump 58 is communicated with the second air extraction opening through a second air extraction pipe, the second air extraction valve 57 is arranged at the joint of the second air extraction opening and the second air extraction pipe, the second air extraction valve 57 is provided with a third signal receiving end, and the second vacuum pump 58 is provided with a fourth signal receiving end;

the pressure sensing end of the second vacuum gauge 59 extends into the defoaming and buffering integrated tank 5, the second vacuum gauge 59 is provided with a third signal transmitting end and a fourth signal transmitting end, the third signal transmitting end is electrically connected with a third signal receiving end, and the fourth signal transmitting end is electrically connected with a fourth signal receiving end;

the second vacuum gauge 59 is set with a threshold value, during the operation of the defoaming and buffering integrated tank 5, the pressure sensing end of the second vacuum gauge 59 senses the negative pressure in the defoaming and buffering integrated tank 5, when the pressure sensing end of the second vacuum gauge 59 senses that the negative pressure in the defoaming and buffering integrated tank 5 is lower than the threshold value, an opening signal is sent to the third signal receiving end through the third signal sending end, at the moment, the second air extraction valve 57 is opened, meanwhile, an opening signal is sent to the fourth signal receiving end through the fourth signal sending end, the second vacuum pump 58 is started, and the second vacuum pump 58 is used for vacuumizing the defoaming and buffering integrated tank 5; when the negative pressure in the pressure sensing end induction defoaming and buffering integrated tank 5 of the second vacuum gauge 59 reaches a threshold value, a closing signal is sent to a third signal receiving end through a third signal sending end, the second extraction valve 57 is closed, meanwhile, a closing signal is sent to a fourth signal receiving end through a fourth signal sending end, and the second vacuum pump 58 is closed;

the third signal transmitting end, the third signal receiving end, the fourth signal transmitting end and the fourth signal receiving end are electrically connected in a conventional manner in the prior art, and are not the utility model, so that the description is omitted.

The first three-way valve 6 is provided with a first inlet end, a first outlet end and a first reflux end, the fourth discharge port is communicated with the first inlet end of the first three-way valve 6 through a pipeline, the fourth discharge port is provided with a first discharge valve 61, a first discharge pump 62 is arranged on a pipeline connected with the first three-way valve 6, the first outlet end of the first three-way valve 6 is communicated with the seventh feed port 51 through a pipeline, and the first reflux end of the first three-way valve 6 is communicated with the fifth feed port 33 through a pipeline;

the second three-way valve 7 is provided with a second inlet end, a second outlet end and a second reflux end, the fifth discharge port is communicated with the second inlet end of the second three-way valve 7 through a pipeline, the second discharge valve 71 is arranged at the fifth discharge port, the second discharge pump 72 is arranged on the pipeline connecting the fifth discharge port with the second three-way valve 7, the second reflux end of the second three-way valve 7 is communicated with the eighth feed port 52 through a pipeline, the second outlet end of the second three-way valve 7 is connected to the subsequent casting forming process through a pipeline, and therefore the material discharged by the defoaming and buffering integrated tank 5 is refluxed to the defoaming and buffering integrated tank 5 and the subsequent casting forming process.

The first inlet end, the first outlet end and the first return end of the first three-way valve 6 may be opened or closed individually, respectively, and the second inlet end, the second outlet end and the second return end of the second three-way valve 7 may be opened or closed individually, respectively.

In the utility model, the first three-way valve 6 and the second three-way valve 7 are pneumatic three-way L-shaped switch valves; the first extraction valve 43 and the second extraction valve 57 are pneumatic switch ball valves; the first vacuum pump 44 and the second vacuum pump 58 are both water ring vacuum pumps; the first vacuum gauge 45 and the second vacuum gauge 59 are absolute pressure transmitters, and the components are only required to be conventional devices in the prior art and are not the utility model, so that the description is omitted.

The utility model mainly realizes the elimination of the air bubbles of the reconstituted tobacco through three-level air bubble control, and mainly comprises the following aspects:

the utility model changes the original mode of adding the adhesive into the tobacco leaves after adding the adhesive into the liquid material preparation tank into the mode of adding the adhesive into the adhesive adding port on the first feeding pipe 11 of the grinder 1. In the running process, the mixed powder is further uniformly mixed by the powder homogenizing bin 2 and then is mixed with the mixed liquid in the homogenizing mixer 3, so that the dissolving position of the adhesive is moved backwards, a large number of bubbles are avoided in the liquid preparation process, and the first-stage bubble control of thick slurry is realized.

The mixed powder is a mixture of an adhesive and smoke powder, and the mixed liquid is a mixture of additional fibers, a smoke agent, water and the like. The adhesive is one of sodium carboxymethyl cellulose, methyl cellulose and hydroxypropyl methyl cellulose, the external fiber is one of natural color or bleached needle wood fiber, and the fuming agent is glycerin.

In actual production, the powder mix and the liquid mix are formulated with a material composition commonly used in the industry, only one example of which is listed here, for example, the powder mix is composed of 1.5 parts of binder and 60 parts of tobacco powder, and the liquid mix is composed of 2 parts of additional fiber, 10 parts of smoke agent and 300 parts of water, and it will be understood by those skilled in the art that the present utility model is not limited to the specific formulation composition described herein.

The working temperature of the pulverizer 1 is less than or equal to 50 ℃.

And secondly, a first vacuum device is arranged outside the thick slurry preparation tank 4, so that no air is mixed when the mixed powder and the mixed liquid are circularly mixed between the homogenizing mixer 3 and the thick slurry preparation tank 4, air bubbles are avoided in the thick slurry preparation process, and the second-stage air bubble control of the thick slurry is realized. The working vacuum degree of the first vacuumizing device is (30-50) kPa.

The thick slurry preparation tank 4 is also communicated with the fifth feed inlet 33 and the seventh feed inlet 51 through the first three-way valve 6, materials discharged from the thick slurry preparation tank 4 can enter the homogenizing mixer 3 and the defoaming and buffering integrated tank 5, and the mixed powder and the mixed liquid are circularly mixed between the homogenizing mixer 3 and the thick slurry preparation tank 4 through the first three-way valve 6, wherein the circulating mixing time is (30-60) min. When the mixed powder and the mixed liquid reach the circulation mixing time, the thick slurry is stopped to be circularly stored in the thick slurry preparation tank 4, and after the thick slurry preparation tank 4 is vacuumized, the thick slurry is pumped to the defoaming and buffering integrated tank 5 through the first discharging pump 62.

And thirdly, a two-stage centrifugal defoaming structure is arranged in the defoaming and buffering integrated tank 5, and a second vacuumizing device is arranged outside the defoaming and buffering integrated tank 5. The thick slurry after circulating mixing in the thick slurry preparation tank 4 enters the defoaming and buffering integrated tank 5 through the seventh feed inlet 51 for circulating defoaming treatment, and mainly comprises two steps of two-stage centrifugal circulating defoaming treatment and vacuum defoaming treatment so as to realize third-stage bubble control of the thick slurry.

The two-stage centrifugal defoaming structure comprises a first screen frame 54, a second screen frame 55 and an annular cylinder 56, and the rotation speed of the first screen frame 54 and the rotation speed of the second screen frame 55 are adjusted by controlling the frequency of a fifth working motor 53.

The two-stage centrifugal circulation defoaming treatment mainly comprises the following steps: the thick slurry entering the defoaming and buffering integrated tank 5 is rapidly thrown to the surface of the annular cylinder 56 through the first screen frame 54 rotating at a high speed under the action of centrifugal force, so that the first-stage centrifugal defoaming treatment is realized, then the thick slurry flows into the second screen frame 55 rotating at a high speed through the surface of the annular cylinder 56, and is rapidly thrown to the inner wall of the defoaming and buffering integrated tank 5 again under the action of centrifugal force, so that the second-stage centrifugal defoaming treatment is realized.

The main process of the vacuum defoaming treatment is as follows: after the thick slurry in the thick slurry preparation tank 4 is fed, the second extraction valve 57 and the second vacuum pump 58 are opened, when the set vacuum degree (40-60) kPa is reached, the second discharge valve 71 is opened, thick slurry in the defoaming and buffering integrated tank 5 is pumped by the second discharge pump 72, enters the eighth feed port 52 of the defoaming and buffering integrated tank 5 through the second three-way valve 7, circularly enters the defoaming and buffering integrated tank 5, and starts to perform the circulating defoaming treatment, when the set circulating defoaming time (20-40) min is reached, the defoaming and buffering integrated tank 5 is vacuumized, and the thick slurry after the defoaming treatment is conveyed to the next working procedure through the second discharge pump 72 and the outlet end of the second three-way valve 7.

In the first, second and third-stage bubble control process of the first thick paste slurry, the temperature of the thick paste slurry is controlled to be less than or equal to 40 ℃.

Example 2

Embodiment 2 provides a method for eliminating bubbles of reconstituted tobacco by a thick slurry method special for heating cigarettes, which specifically comprises the following steps:

1) The tobacco fragments enter the pulverizer 1 from the first feeding pipe 11, meanwhile, the adhesive enters the pulverizer 1 from the adhesive adding port, mixed powder is obtained after pulverization in the pulverizer 1, then the mixed powder enters the powder homogenizing bin 2 through the first discharging pipe 13, the mixed powder in the powder homogenizing bin 2 is homogenized through overturning, and the mixed powder enters the homogenizing mixer 3 from the third feeding port 31;

meanwhile, adding mixed liquid material from the fourth feed inlet 32, starting the third working motor 35 to mix the mixed powder material and the mixed liquid material, and compared with the conventional technology, the adhesive is added in the preparation process of the mixed liquid material, so that the backward movement of the dissolving position of the adhesive is realized, a large number of bubbles are avoided in the preparation process of the mixed liquid material, the first-stage bubble control of thick slurry is realized, and the composition and the proportion of the mixed powder material and the mixed liquid material in the embodiment 2 are the same as those in the embodiment 1;

2) The mixed thick slurry is discharged from the third discharge hole 34 and enters the thick slurry preparation tank 4 through the sixth feed hole 41, the fourth working motor 42 is started to further mix materials, at the moment, the negative pressure in the thick slurry preparation tank 4 is detected through the first vacuum gauge 45, when the negative pressure in the thick slurry preparation tank 4 is lower than a threshold value, an opening signal is sent to the first signal receiving end of the first extraction valve 43 through the first signal sending end of the first vacuum gauge 45, an opening signal is sent to the second signal receiving end of the first vacuum pump 44 through the second signal sending end of the first vacuum gauge 45, the first extraction valve 43 and the first vacuum pump 44 are opened, the first vacuum pump 44 starts to perform vacuum pumping, when the pressure sensing end of the first vacuum gauge 45 senses that the negative pressure in the thick slurry preparation tank 4 reaches the threshold value, a closing signal is sent to the first signal receiving end through the first signal sending end, the first vacuum valve 43 is closed, and meanwhile, a closing signal is sent to the second signal receiving end through the second signal sending end of the first vacuum gauge 45, and the first vacuum pump 44 is closed;

simultaneously, a first discharge valve 61, a first discharge pump 62, a first inlet end and a first backflow end of a first three-way valve 6 are opened, a first outlet end of the first three-way valve 6, a third feed inlet 31 and a fourth feed inlet 32 are closed, materials flow back to the homogenizing mixer 3 and enter the thick slurry preparation tank 4, so that the circulating mixing between the homogenizing mixer 3 and the thick slurry preparation tank 4 is realized, and the circulating mixing time is (30-60) min;

the first vacuum device is used for vacuumizing, so that no air is mixed when the mixed powder and the mixed liquid are circularly mixed between the homogenizing mixer 3 and the thick slurry preparation tank 4, bubbles are avoided in the thick slurry preparation process, and the second-stage bubble control of the thick slurry is realized; the working vacuum degree of the first vacuumizing device is (30-50) kPa;

when the mixed powder and the mixed liquid reach the circulation mixing time, the first reflux end of the first three-way valve 6 is closed, the first outlet end is opened, thick slurry stops circulating and is stored in the thick slurry preparation tank 4, the first vacuum device is stopped for vacuumizing, after the thick slurry preparation tank 4 is vacuumized, thick slurry is pumped by the first discharge pump 62 and enters the defoaming and buffering integrated tank 5 through the first outlet end of the first three-way valve 6 and the seventh feed inlet 51;

3) After the thick slurry enters the defoaming and buffering integrated tank 5, a fifth working motor 53 is started to further mix materials, and the thick slurry third-stage bubble control is realized through two steps of two-stage centrifugal circulation defoaming treatment and vacuum defoaming treatment in the defoaming and buffering integrated tank 5;

the two-stage centrifugal circulation defoaming treatment mainly comprises the following steps: the thick slurry entering the defoaming and buffering integrated tank 5 is rapidly thrown to the surface of an annular cylinder 56 under the action of centrifugal force through a first screen frame 54 rotating at a high speed, so that the first-stage centrifugal defoaming treatment is realized, then the thick slurry flows into a second screen frame 55 rotating at a high speed through the surface of the annular cylinder 56, and is rapidly thrown to the inner wall of the defoaming and buffering integrated tank 5 again under the action of centrifugal force, so that the second-stage centrifugal defoaming treatment is realized;

the main process of the vacuum defoaming treatment is as follows: after the thick slurry in the thick slurry preparation tank 4 is fed, detecting the negative pressure in the defoaming and buffering integrated tank 5 through the second vacuum gauge 59, when the negative pressure in the defoaming and buffering integrated tank 5 is lower than a threshold value, sending an opening signal to a third signal receiving end of the second extraction valve 57 through a third signal sending end of the second vacuum gauge 59, sending an opening signal to a fourth signal receiving end of the second vacuum pump 58 through a fourth signal sending end of the second vacuum gauge 59, opening the second extraction valve 57 and the second vacuum pump 58, starting vacuumizing the second vacuum pump 58, sending a closing signal to the third signal receiving end through the third signal sending end when the set vacuum degree (40-60) kPa is reached, closing the second extraction valve 57, and simultaneously sending a closing signal to the fourth signal receiving end through the fourth signal sending end, and closing the second vacuum pump 58;

simultaneously, the second discharge valve 71, the second discharge pump 72, the second inlet end and the second reflux end of the second three-way valve 7 are opened, the first outlet end of the first three-way valve 6 is closed, thick slurry in the defoaming and buffering integrated tank 5 is pumped by the second discharge pump 72, enters the eighth feed port 52 of the defoaming and buffering integrated tank 5 through the second three-way valve 7, circularly enters the defoaming and buffering integrated tank 5, and starts to perform circular defoaming treatment;

when the set circulation defoaming time (20-40) min is reached, the second reflux end of the second three-way valve 7 is closed, the second vacuum device is stopped to vacuumize, the defoaming and buffering integrated tank 5 is used for discharging vacuum, the second outlet end of the second three-way valve 7 is opened, and the thick slurry after defoaming treatment is conveyed to the next working procedure through the second discharge pump 72 and the second outlet end of the second three-way valve 7.

Reconstituted tobacco products made from thick stock slurries treated with the system and method of the present utility model are tested as follows.

The thick slurry processed by the bubble elimination system is prepared into reconstituted tobacco products, 8 groups of samples are selected to detect tensile strength, elongation and density, and the average value of each index is calculated and compared with the reconstituted tobacco products of thick slurry method which are not processed by the bubble elimination system, and the results are shown in table 1.

Table 1 comparison of physical Properties of reconstituted tobacco in thick slurry method before and after treatment by bubble elimination System

The comparison result shows that after the thick slurry is subjected to bubble elimination treatment, the prepared thick slurry reconstituted tobacco product has improved key physical indexes such as longitudinal tensile strength, longitudinal elongation, transverse tensile strength, transverse elongation and the like, wherein the longitudinal tensile strength and the transverse tensile strength are respectively increased by 14.00 percent and 18.06 percent compared with those before treatment, if too many bubbles exist in the thick slurry, the thick slurry is blocked by the bubbles with large size and small size, so that the uniformity of the prepared thick slurry reconstituted tobacco is poor, and at the same time, the bubble parts are free of adhesives, fibers and tobacco powder, the strength is weak, the tobacco product is extremely easy to break in the follow-up disordered shredding and ordered rolling processes, and the integral processing resistance is further influenced. Therefore, the effective elimination of the slurry bubbles in the thick slurry method has important significance for improving the physical properties of the reconstituted tobacco products in the thick slurry method.

In the description of the present utility model, it should be noted that, for the azimuth words such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present utility model and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present utility model that the device or element referred to must have a specific azimuth configuration and operation.

It should be noted that the terms "first," "second," and the like in the description and in the claims of the present application are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the present application described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, what should be said is: the foregoing description is only of the preferred embodiments of the utility model and the application of the principles of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the present utility model has been described in connection with the above embodiments, it is to be understood that the utility model is not limited to the specific embodiments disclosed and that many other and equally effective embodiments may be devised without departing from the spirit of the utility model, and the scope thereof is determined by the scope of the appended claims.

Claims (5)

1. The system is characterized by comprising an adhesive adding device, a pulverizer, a powder homogenizing bin, a homogenizing mixer, a thick slurry preparation tank, a defoaming and buffering integrated tank, a first three-way valve, a second three-way valve, a first vacuumizing device and a second vacuumizing device;

the side wall of the pulverizer is provided with a first feeding pipe, the side wall of the first feeding pipe is provided with an adhesive adding port, and the output end of the adhesive adding device is communicated with the adhesive adding port through a pipeline; the top end of the pulverizer is provided with a first discharging pipe;

the top end of the powder homogenizing bin is provided with a second feeding hole, and the bottom end of the powder homogenizing bin is provided with a second discharging hole; the first discharging pipe is communicated with the second feeding port through a pipeline;

the top end of the homogenizing mixer is provided with a third feed inlet, a fourth feed inlet and a fifth feed inlet, and the side wall of the homogenizing mixer is provided with a third discharge outlet; the second discharge port is communicated with the third feed port through a pipeline; the third feeding port is a mixed powder inlet, and the fourth feeding port is a mixed liquid inlet;

the top end of the thick slurry preparation tank is provided with a sixth feed inlet and a first extraction opening, and the bottom end of the thick slurry preparation tank is provided with a fourth discharge opening; the third discharge port is communicated with the sixth feed port through a pipeline;

a seventh feed port, an eighth feed port and a second extraction port are formed in the top end of the defoaming and buffering integrated tank, and a fifth discharge port is formed in the bottom end of the defoaming and buffering integrated tank;

the first three-way valve is provided with a first inlet end, a first outlet end and a first reflux end, the fourth discharge port is communicated with the first inlet end of the first three-way valve through a pipeline, the first outlet end of the first three-way valve is communicated with the seventh feed port through a pipeline, and the first reflux end of the first three-way valve is communicated with the fifth feed port through a pipeline;

the second three-way valve is provided with a second inlet end, a second outlet end and a second reflux end, the fifth discharge port is communicated with the second inlet end of the second three-way valve through a pipeline, and the second reflux end of the second three-way valve is communicated with the eighth feed port through a pipeline.

2. The system for removing bubbles from reconstituted tobacco by thick slurry process special for heating cigarettes according to claim 1, wherein the first vacuumizing device comprises a first air extraction valve, a first vacuum pump and a first vacuum gauge; the air extraction end of the first vacuum pump is communicated with the first air extraction opening through a first air extraction pipe, the first air extraction valve is arranged at the joint of the first air extraction opening and the first air extraction pipe, the first air extraction valve is provided with a first signal receiving end, and the first vacuum pump is provided with a second signal receiving end;

the pressure sensing end of the first vacuum meter stretches into the thick paste preparation tank, the first vacuum meter is provided with a first signal sending end and a second signal sending end, the first signal sending end is electrically connected with the first signal receiving end, and the second signal sending end is electrically connected with the second signal receiving end.

3. The system for eliminating bubbles in reconstituted tobacco by thick slurry method special for heating cigarettes according to claim 1, wherein a crushing roller which is horizontally arranged is arranged in the crusher, the shaft end of the crushing roller extends out of the crusher, and the shaft end of the crushing roller is connected with a first working motor;

a turnover roller which is horizontally arranged is arranged in the powder homogenizing bin, and the shaft end of the turnover roller is connected with a second working motor;

a first stirring shaft which is vertically arranged is arranged in the homogenizing mixer, the shaft end of the first stirring shaft is connected with a third working motor, and a first stirring blade is arranged on the first stirring shaft;

a second stirring shaft which is vertically arranged is arranged in the thick slurry preparation tank, the shaft end of the second stirring shaft is connected with a fourth working motor, and a second stirring blade is arranged on the second stirring shaft;

a third stirring shaft which is vertically arranged is arranged in the defoaming and buffering integrated tank, and the shaft end of the third stirring shaft is connected with a fifth working motor.

4. The system for eliminating bubbles in reconstituted tobacco by thick slurry process special for heating cigarettes according to claim 3, wherein the third stirring shaft is provided with a first screen frame and a second screen frame; the first screen frame is positioned above the second screen frame; the top cap of defoaming buffer memory integrative jar is equipped with downwardly extending's annular section of thick bamboo, and annular section of thick bamboo bottom opening, first reel are located annular section of thick bamboo inboard.

5. The system for eliminating bubbles in reconstituted tobacco by thick slurry method special for heating cigarettes according to claim 1, wherein the second vacuumizing device comprises a second air extraction valve, a second vacuum pump and a second vacuum gauge; the air extraction end of the second vacuum pump is communicated with the second air extraction opening through a second air extraction pipe, the second air extraction valve is arranged at the joint of the second air extraction opening and the second air extraction pipe, the second air extraction valve is provided with a third signal receiving end, and the second vacuum pump is provided with a fourth signal receiving end;

the pressure sensing end of the second vacuum meter stretches into the defoaming and buffering integrated tank, the second vacuum meter is provided with a third signal sending end and a fourth signal sending end, the third signal sending end is electrically connected with a third signal receiving end, and the fourth signal sending end is electrically connected with a fourth signal receiving end.