Tobacco leaf moistening structure of redrying machine capable of redrying by using full saturated steam
By using fully saturated steam and fan-shaped atomization nozzles in the refrigeration section of the refrigeration machine, the problem of water droplets forming water-stained smoke is solved, achieving uniform moisture and energy-saving effects of tobacco leaves, reducing production costs.
Patent Information
- Application Number
- CN202422356890.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-08-29
- Estimated Expiration
- 2034-09-26
AI Technical Summary
During the process of re-wetting tobacco leaves, the existing re-growing machine uses circulating direct-injected steam and water to cause water droplets to form smoke, which also increases energy consumption and production costs.
A fully saturated steam refrigerator is used to install a fan-shaped atomization nozzle and a universal adjustable nozzle in the tide recovery section, and use saturated steam to recover, avoid the use of soft water, ensure that the tobacco leaves are evenly damp and save steam consumption.
It improves the permeability and uniformity of tobacco leaves, avoids the formation of water-stained smoke, reduces steam consumption, and reduces production costs.
Smart Images
Figure CN223274883U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a leaf moistening structure of a tobacco leaf re-drying machine which utilizes fully saturated steam for re-drying, and belongs to the technical field of tobacco leaf re-drying. Background Art
[0002] In the production process of cigarettes, redrying of tobacco leaves is an important link in the process of processing tobacco leaves after primary drying into cigarette production. The main purpose of redrying of tobacco leaves is to adjust and control the moisture content of tobacco leaves for safe storage and aging, thereby meeting the needs of cigarette production.
[0003] The tobacco redrying machine used in existing redrying plants is a device that feeds the tobacco leaves after threshing and destemming into the redrying machine. The tobacco leaves are then spread flat on the conveyor chain of the redrying machine, and the tobacco leaves are continuously dried, cooled, and rehumidified to control the moisture content of the tobacco leaves. After the tobacco leaves enter the redrying machine, the heat exchanger inside it generates stable heat to dry the tobacco leaves through hot air convection. The stable temperature requires steam produced by the boiler workshop at a pressure of 0.8-1.2MPa, which is transported to the redrying machine through a steam pipeline.
[0004] After being dried in the redrying machine, the tobacco leaves are cooled by circulating air and then enter the rehumidification area. The rehumidification of the existing redrying machine uses circulating air to carry direct injection steam and water to rehumidify the tobacco leaves, increasing the moisture content of the tobacco leaves from 10% to 13%, meeting the process requirements for packaging and storage.
[0005] However, the existing redrying machine uses circulating direct-injection steam and water to rehumidify tobacco leaves, but there are the following problems. Due to the addition of soft water, the steam is easily cooled to form water droplets. The water droplets fall on the tobacco leaves and easily form water-stained tobacco and steamed tobacco. At the same time, in order to make the tobacco leaves rehumidify quickly and thoroughly, the rehumidification zone of the redrying machine must be kept at a certain temperature. The injection of low-temperature soft water will take away a lot of heat and increase the steam consumption in the rehumidification zone, which not only causes a waste of resources but also increases production costs for enterprises. Utility Model Content
[0006] In view of this, the purpose of the present invention is to provide a blade moistening structure for a redrying machine that only utilizes fully saturated steam for redrying, so as to at least solve the problems mentioned in the background art.
[0007] The purpose of this utility model is achieved through the following technical solutions:
[0008] A leaf moistening structure of a redrying machine utilizing fully saturated steam redrying includes a redrying machine body, which is divided into a drying section and a rehumidification section. A material conveying chain is provided in the redrying machine body. The structure also includes a saturated steam preparation device, which is connected to a saturated steam heating main pipe located in the redrying machine body through a pipeline. An air jet and a saturated steam branch pipe are connected to the saturated steam heating main pipe in each rehumidification section. A fan-shaped nozzle capable of forming a fan surface of saturated steam is connected to the end of the saturated steam branch pipe. The fan-shaped saturated steam ejected from the fan-shaped nozzle is parallel to the material conveying chain.
[0009] The aforementioned leaf-wetting structure of the re-drying machine utilizing fully saturated steam for re-drying is that the fan-shaped nozzle is a universally adjustable nozzle.
[0010] The aforementioned leaf moistening structure of the redrying machine utilizing fully saturated steam for redrying is that the air jet nozzle is a universally adjustable nozzle.
[0011] The aforementioned blade moistening structure of the redrying machine utilizing fully saturated steam redrying is that a valve and a pressure gauge are provided on the pipeline connecting the saturated steam preparation device and the saturated steam heating main.
[0012] The blade moistening structure of the above-mentioned re-drying machine using fully saturated steam for re-drying is that the fan-shaped nozzle is a straight-line nozzle with a nozzle outlet.
[0013] Compared to the existing technology, the present invention utilizes a single saturated steam rehumidification mode in the rehumidification section of the reheating machine. By installing air jets on the existing saturated steam heating main pipe to spray steam back outward, a set of fan-shaped atomizing nozzles is also added to each rehumidification zone. This utilizes saturated steam to moisten the tobacco leaves, allowing them to fully absorb moisture and raise their temperature within the cylinder. This improves the uniformity and penetration of moistening while maintaining a stable tobacco flow rate. By eliminating the addition of soft water, the formation of water-stained and steamed tobacco leaves is avoided, ensuring the original color of the tobacco leaves and meeting the moisture and temperature requirements of the threshing process. Calculations show that using saturated steam to moisten the leaves reduces energy consumption per ton of tobacco leaves by approximately 3% compared to the traditional steam and soft water mixed mode, demonstrating excellent economic value.
[0014] The newly installed fan-shaped atomizing nozzle sprays fan-shaped saturated steam parallel to the material conveying chain. This angle avoids the contact between the steam and the drying machine mesh plate and the bottom plate of the rehumidification zone, ensuring the atomization and effective circulation effect of the rehumidification steam, and improving the uniformity and stability of the tobacco leaf moisture.
[0015] The fan-shaped nozzle and air nozzle adopt universal adjustable nozzles, the angle of which can be adjusted according to the site, reducing the difficulty of installation. It can be flexibly adjusted in the narrow space of the lower air inlet and return moisture area and is easy to disassemble and assemble, making it easy to maintain.
[0016] Other advantages, objectives, and features of the present invention will be described in detail in the following description and, to some extent, will be apparent to those skilled in the art upon examination and study of the following or may be learned from practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings, in which:
[0018] Figure 1 It is a structural diagram of the utility model;
[0019] Figure 2 Schematic diagram of a universally adjustable nozzle. DETAILED DESCRIPTION
[0020] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0021] Example 1
[0022] like Figure 1 and Figure 2 As shown, it includes a re-drying machine body 1, which is divided into a multi-stage drying section and a re-humidification section. A material conveying chain for conveying tobacco slices is provided in the re-drying machine body 1. The utility model is an improvement on the re-humidification section, which cancels the soft water atomization humidification mode of the high-pressure water pump and only uses saturated steam for re-humidification. Therefore, a saturated steam preparation device is required to obtain saturated steam. The saturated steam preparation device is preferably a steam boiler. The saturated steam preparation device is connected to the saturated steam heating main pipe 2 located in the re-drying machine body 1 through a pipeline. The pipe connected to the steam heating main pipe 2 is provided with a valve and a pressure gauge; an air nozzle 3 and a saturated steam branch pipe 4 are connected to the saturated steam heating main pipe 2 in each rehumidification section. The air nozzle 3 adopts a universally adjustable nozzle structure, and the steam formed at the outlet of the air nozzle 3 is umbrella-shaped; a fan-shaped nozzle 5 that can form a fan surface of saturated steam is connected to the end of the saturated steam branch pipe 4. The fan-shaped nozzle 5 is a universally adjustable nozzle. The fan-shaped surface saturated steam ejected by the fan-shaped nozzle 5 is parallel to the material conveying chain 6. The fan-shaped nozzle 5 is a straight-line nozzle with a nozzle outlet.
[0023] The above description is only a preferred embodiment of the present invention and does not constitute any form of confidentiality restriction on the present invention. Any simple modification, equivalent change and modification of the above embodiment made based on the technical essence of the present invention without departing from the content of the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.
Claims
1. A leaf moistening structure of a re-drying machine utilizing fully saturated steam for re-drying, comprising a re-drying machine body (1), wherein the re-drying machine body (1) is divided into a drying section and a re-humidification section, and a material conveying chain is provided in the re-drying machine body (1), characterized in that: The invention also includes a saturated steam preparation device, which is connected to a saturated steam heating main pipe (2) located in a reheating machine body (1) through a pipeline. An air jet nozzle (3) and a saturated steam branch pipe (4) are connected to the saturated steam heating main pipe (2) in each rehumidification section. A fan-shaped nozzle (5) capable of forming a fan-shaped saturated steam is connected to the end of the saturated steam branch pipe (4). The fan-shaped nozzle (5) ejects the fan-shaped saturated steam in parallel with the material conveying chain (6).
2. The leaf moistening structure of the redrying machine using fully saturated steam redrying according to claim 1, characterized in that: The fan-shaped nozzle (5) is a universally adjustable nozzle.
3. The leaf moistening structure of the redrying machine using fully saturated steam redrying according to claim 2, characterized in that: The air nozzle (3) is a universally adjustable nozzle.
4. The leaf moistening structure of the redrying machine using fully saturated steam redrying according to claim 3, characterized in that: A valve and a pressure gauge are provided on the pipeline connecting the saturated steam preparation device and the saturated steam heating main pipe (2).
5. The leaf moistening structure of the redrying machine using fully saturated steam redrying according to claim 2, characterized in that: The fan-shaped nozzle (5) is a nozzle with a straight-line nozzle outlet.