Method for rapidly moistening and puffing tobacco stems and application

Abstract

The invention discloses a method for rapidly moistening and puffing tobacco stems and application. The method comprises the following steps: 1) preparing stem washing water by using ammonium carbonate and water; 2) washing stems by using the prepared stem washing water; (3) steaming the washed tobacco stems by using a high-pressure stem steaming machine, and maintaining the pressure for a certain time; (4) after the pressure maintaining time is over, continuously heating and boosting the stem steaming machine, and maintaining the pressure for a certain time again; (5) after the secondary pressure maintaining is finished, the high-pressure stem steaming machine is subjected to rapid pressure relief; and (6) after pressure relief is finished, the steamed tobacco stems are taken out. High-pressure stem steaming is conducted after the tobacco stems are washed with water, moisture can permeate into the tobacco stems rapidly, the tobacco stem moistening time is shortened, meanwhile, stem washing water containing ammonium carbonate is prepared for stem washing, ammonium carbonate is decomposed at high temperature after permeating into the tobacco stems, a large amount of gas is generated, the gas is rapidly discharged from the tobacco stems in the rapid pressure relief process, and the tobacco stems are washed completely. And the tobacco stems are properly puffed, so that the subsequent preparation and processing of the cut stems are facilitated. Compared with the method for manufacturing the tobacco stem shreds, the method for manufacturing the tobacco stem shreds can shorten the time by 3-5 hours, and the production efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of tobacco, and particularly relates to a method for rapidly moistening and puffing tobacco stems and an application thereof. Background Art

[0002] Tobacco stems are an important component of tobacco leaves. After tobacco leaves are separated from stems, tobacco stems accounting for about 25% of the weight of tobacco leaves can be obtained. Tobacco stems can be used to make stem shreds or reconstituted tobacco leaves. In the process of making stem shreds, the tobacco stems need to be moistened with water first to swell, then squeezed into sheets for slicing, and finally heated and pressurized to quickly release the pressure to make them puffy. In this technical solution, the tobacco stems need to be stored in a storage cabinet for 4-6 hours after adding water and moistening, in order to allow the inside and outside of the tobacco stems to fully absorb moisture, so that the shriveled cells can be filled and softened again, which is convenient for subsequent pressing and slicing of stems. However, the existing technical solutions have the disadvantages of being time-consuming and occupying a lot of equipment. Summary of the invention

[0003] In order to reduce the time for tobacco stems to regain moisture and become permeable during the preparation of shredded stems, the present invention provides a method for rapidly permeating and puffing tobacco stems and its application.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A method for rapidly moistening and puffing tobacco stems comprises the following steps:

[0006] 1) Add ammonium carbonate to water to prepare stem washing water, the mass of ammonium carbonate is 10%-20% of the mass of water;

[0007] 2) washing the tobacco stems with the stem washing water prepared in step 1), wherein the moisture content of the tobacco stems before washing is 8-14%, and the moisture content of the tobacco stems after washing is 35-45%, the temperature of the stem washing water is 30-40° C., and the washing time is 30-60 seconds;

[0008] 3) steaming the washed tobacco stems in step 2) using a high-pressure stem steamer, wherein the equipment used for steaming the tobacco stems is an intermittent rotary stem steamer, using saturated steam for steaming the tobacco stems, the temperature of the steaming stems is 80-130° C., the pressure of the steaming stems is 0.1-0.27 MPa, and the pressure is maintained for 3-10 minutes;

[0009] 4) After the pressure holding time is over, the temperature of the stem steamer is continued to be raised to 150-160°C, the pressure is raised to 0.5-0.7MPa, and the pressure is maintained for 3-10 minutes;

[0010] 5) After the intermediate pressure maintenance in step 4) is completed, the high-pressure stem steaming machine is quickly depressurized, and the depressurization time is less than 2 minutes;

[0011] 6) After the pressure is released, take out the steamed tobacco stems.

[0012] Preferably, in step 1), the mass of ammonium carbonate is 14%-18% of the mass of water;

[0013] Further preferably, the mass of ammonium carbonate is 16% of the mass of water.

[0014] Preferably, in step 2), the moisture content of the tobacco stems before washing is 10-12%, and the moisture content of the tobacco stems after washing is 38-42%, the temperature of the stem washing water is 35° C., and the washing time is 45 seconds.

[0015] Preferably, in step 3), the temperature for steaming the stems is 90-110° C., the pressure for steaming the stems is 0.1-0.14 MPa, and the holding time is 3-5 min.

[0016] Preferably, in step 4), the temperature of the stem steamer is 155° C. after the temperature is increased, the pressure of the stem steamer is 0.55 MPa after the pressure is increased, and the pressure holding time is 3-5 min.

[0017] Preferably, in step 5), the pressure release time is less than 30 seconds.

[0018] The above method for quickly moistening and puffing tobacco stems.

[0019] The above method and application of quickly moistening and puffing tobacco stems.

[0020] The beneficial effects of the present invention are:

[0021] 1. The present invention steams the tobacco stems under high pressure after washing them with water. Under the action of steam pressure and temperature, water can quickly penetrate into the tobacco stems, shortening the time for the tobacco stems to be moistened, thereby improving the production efficiency of shredded stems and reducing the waiting time of equipment.

[0022] 2. The stem washing water containing ammonium carbonate configured in the present invention is used for stem washing. After the ammonium carbonate penetrates into the tobacco stems, it is heated to above 150°C and then decomposed to produce ammonia, carbon dioxide and water. These gases are quickly discharged from the tobacco stems during the rapid pressure relief process, which destroys the fiber bonding strength in the tobacco stems and makes the tobacco stems moderately puffed, which is convenient for the subsequent preparation and processing of stem shreds. DETAILED DESCRIPTION

[0023] It should be noted that the following detailed descriptions are illustrative and are intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0025] Example 1

[0026] 1) Add ammonium carbonate to water to prepare stem washing water, the mass of ammonium carbonate is 16% of the mass of water;

[0027] 2) Washing the tobacco stems with the stem washing water prepared in step 1), wherein the moisture content of the tobacco stems before washing is 12% and the moisture content of the tobacco stems after washing is 40%, the temperature of the stem washing water is 35° C., and the washing time is 45 seconds;

[0028] 3) steaming the washed tobacco stems in step 2) using a high-pressure stem steamer, wherein the equipment used for steaming the tobacco stems is an intermittent rotary stem steamer, using saturated steam for steaming the tobacco stems, the steaming temperature is 110° C., the steaming pressure is 0.14 MPa, and the pressure is maintained for 4 minutes;

[0029] 4) After the pressure holding time is over, the temperature of the stem steamer is continued to be raised to 155°C, the pressure is increased to 0.55MPa, and the pressure is maintained for 3 minutes;

[0030] 5) After the intermediate pressure maintenance in step 4) is completed, the high-pressure stem steaming machine is quickly depressurized for 20 seconds;

[0031] 6) After the pressure is released, the tobacco stems are taken out after being steamed, pressed and sliced ​​to prepare shredded stems.

[0032] Comparative Example 1

[0033] The difference from Example 1 is that in step 1) to step 2), the stem washing water is ordinary purified water with a water temperature of 60°C, the stems are stored for 6 hours after washing, and then the stems are pressed and sliced ​​to prepare stem shreds, and the processes in step 3) to step 5) are not adopted.

[0034] Comparative evaluation

[0035] Table 1 Difference in moisture content of inner and outer layers of tobacco stems

[0036] serial number Inner layer (%) Outer layer (%) Difference (%) Blank sample (tobacco stems after washing) 42 28 14 Example 1 40 38 2 Comparative Example 1 41 38 3

[0037] It can be seen from the data in Table 1 that the embodiment 1 of the present invention achieves the same tobacco stem moistening effect as the stored stems.

[0038] Table 2 Differences in stem size

[0039] serial number Average diameter(mm) Blank sample (tobacco stems after washing) 2.72 Example 1 3.97 Comparative Example 1 (tobacco stems after storage) 3.34

[0040] It can be seen from the data in Table 2 that the diameter of the tobacco stems in Example 1 of the present invention increases by 18.86% relative to that in Comparative Example 1, and the present invention plays a role in puffing the tobacco stems.

Claims

1. A method for rapidly moistening and puffing tobacco stems, comprising the following steps: 1) Add ammonium carbonate to water to prepare stem washing water, the mass of ammonium carbonate is 10%-20% of the mass of water; 2) washing the tobacco stems with the stem washing water prepared in step 1), wherein the moisture content of the tobacco stems before washing is 8-14%, and the moisture content of the tobacco stems after washing is 35-45%, the temperature of the stem washing water is 30-40° C., and the washing time is 30-60 seconds; 3) steaming the washed tobacco stems in step 2) using a high-pressure stem steamer, wherein the equipment used for steaming the tobacco stems is an intermittent rotary stem steamer, using saturated steam for steaming the tobacco stems, the temperature of the steaming stems is 80-130° C., the pressure of the steaming stems is 0.1-0.27 MPa, and the pressure is maintained for 3-10 minutes; 4) After the pressure holding time is over, the temperature of the stem steamer is continued to be raised to 150-160°C, the pressure is raised to 0.5-0.7MPa, and the pressure is maintained for 3-10 minutes; 5) After the intermediate pressure maintenance in step 4) is completed, the high-pressure stem steaming machine is quickly depressurized, and the depressurization time is less than 2 minutes; 6) After the pressure is released, take out the steamed tobacco stems.

2. The method for rapidly moistening and puffing tobacco stems according to claim 1, characterized in that: In step 1), the mass of ammonium carbonate is 14%-18% of the mass of water; Preferably, the mass of ammonium carbonate is 16% of the mass of water.

3. The method for rapidly moistening and puffing tobacco stems according to claim 1, characterized in that: In step 2), the moisture content of the tobacco stems before washing is 10-12%, and the moisture content of the tobacco stems after washing is 38-42%. The temperature of the stem washing water is 35° C., and the washing time is 45 seconds.

4. The method for rapidly moistening and puffing tobacco stems according to claim 1, characterized in that: In step 3), the temperature of steaming the stems is 90-110° C., the pressure of steaming the stems is 0.1-0.14 MPa, and the pressure holding time is 3-5 min.

5. The method for rapidly moistening and puffing tobacco stems according to claim 1, characterized in that: In step 4), the temperature of the stem steaming machine is 155° C. after the temperature is increased, the pressure of the stem steaming machine is 0.55 MPa after the pressure is increased, and the pressure holding time is 3-5 minutes.

6. The method for rapidly moistening and puffing tobacco stems according to claim 1, characterized in that: In step 5), the pressure relief time is less than 30s.

7. The method for rapidly moistening and puffing tobacco stems according to any one of claims 1 to 6.

8. The method for rapidly moistening and puffing tobacco stems as claimed in claim 7 and its use.