Carbon crystal plate heat supply-based tobacco leaf curing barn with heat recovery device and temperature and humidity control method thereof

文档序号：752740 发布日期：2021-04-06 浏览：81次中文

阅读说明：本技术 一种带热回收装置的基于碳晶板供热的烟叶烤房及其温湿度控制方法 (Carbon crystal plate heat supply-based tobacco leaf curing barn with heat recovery device and temperature and humidity control method thereof ) 是由任杰尹东升郑成鹏谭效磊朱丹平徐秀红于 2020-12-21 设计创作，主要内容包括：本发明属于烟叶烘烤调制技术领域,具体涉及一种带热回收装置的基于碳晶板供热的烟叶烤房及其温湿度控制方法。本发明所提供的烟叶烤房包括装烟室,装烟室两侧侧墙上设有相连接的显热交换装置和湿热风管道；同时采用碳晶加热板以实现烟叶清洁、经济、高效烘烤。该烟叶烤房通过特定温湿度控制方法：(1)烘烤参数设定(2)烘烤过程干球温度控制(3)烘烤过程湿球温度及显热交换控制,可以实现以电能为能源,以远红外辐射传热为主、对流传热为辅进行烟叶烘烤,实现烟叶清洁烘烤的同时,达到烟叶内部和外部同时干燥,提高烟叶柔软性,保证烟叶质量。(The invention belongs to the technical field of tobacco leaf baking and modulation, and particularly relates to a carbon crystal plate heat supply-based tobacco leaf baking room with a heat recovery device and a temperature and humidity control method thereof. The tobacco leaf curing barn provided by the invention comprises a tobacco containing chamber, wherein the side walls on the two sides of the tobacco containing chamber are provided with a sensible heat exchange device and a damp and hot air pipeline which are connected; meanwhile, the carbon crystal heating plate is adopted to realize clean, economical and efficient baking of the tobacco leaves. The tobacco leaf curing barn adopts a specific temperature and humidity control method: (1) the tobacco leaf baking method has the advantages that the baking parameters are set (2), the baking process dry bulb temperature is controlled (3), the baking process wet bulb temperature and sensible heat exchange control is realized, tobacco leaf baking can be realized by taking electric energy as energy, far infrared radiation heat transfer is taken as a main part, convection heat transfer is taken as an auxiliary part, the inside and outside of the tobacco leaf are dried simultaneously when the tobacco leaf is cleaned and baked, the softness of the tobacco leaf is improved, and the quality of the tobacco leaf is guaranteed.)

1. A tobacco leaf curing barn with a heat recovery device and based on carbon crystal plate heat supply is characterized by comprising a tobacco containing chamber, wherein the side walls on the two sides of the tobacco containing chamber are provided with a sensible heat exchange device and a damp and hot air pipeline which are connected;

the carbon crystal heating plate and the tobacco hanging beam are arranged in the tobacco loading chamber, and a curing barn fresh air port and a moisture removal fan are arranged on the wall body of the tobacco loading chamber; the carbon crystal heating plates are arranged on the inner sides of the top and the bottom of the tobacco containing chamber and are used for heating tobacco leaves hung on the tobacco hanging beam; the fresh air ports of the curing barn are arranged at the bottoms of the side walls at the two sides of the tobacco containing chamber, and the moisture exhausting fan is arranged at the upper parts of the side walls at the two sides of the tobacco containing chamber;

the sensible heat exchange device comprises a damp and hot air inlet, an external fresh air inlet, a heat exchanger, a damp and hot air outlet after heat exchange, a fresh air outlet after heat exchange and a fresh air pipeline; the heat exchanger is arranged at the central position of the sensible heat exchange device; the wet and hot air inlet is arranged on one side of the sensible heat exchange device and is connected with a wet and hot air pipeline, and the wet and hot air outlet after heat exchange is positioned on the opposite side of the wet and hot air inlet; the external fresh air inlet is arranged on one side of the sensible heat exchange device, and the fresh air outlet after heat exchange is arranged on the oblique opposite side of the external fresh air inlet and is connected with the fresh air port of the curing barn; the fresh air pipeline is arranged on two sides of the fresh air outlet after heat exchange.

2. The tobacco leaf curing barn according to claim 1, wherein a tobacco containing chamber door for an operator to enter and exit is further arranged on one side wall of the tobacco containing chamber, a circulating air duct and a circulating fan are mounted on the inner side of the wall opposite to the tobacco containing chamber door, and the lower portion of the circulating air duct is connected with the circulating fan.

3. The tobacco flue-curing barn according to claim 1 or 2, wherein the carbon crystal heating plates are installed in one or more numbers; the number of the circulating fans is one or more, and the number of the circulating air channels is consistent with that of the circulating fans; the number of the moisture exhausting fans is one or more.

4. The tobacco curing barn of claim 1, wherein the heat exchangers are in one or more groups.

5. The tobacco flue-curing barn according to claim 1, wherein the heat exchanger is of a fin structure and is made of any one of hydrophilic aluminum foil and epoxy resin.

6. A temperature and humidity control method of a carbon crystal plate heat supply-based tobacco leaf curing barn with a heat recovery device is characterized by comprising the following steps:

(1) setting baking parameters: setting target dry bulb temperature Tdset and target wet bulb temperature Twset in the tobacco loading chamber at different stages of tobacco leaf curing, and setting target heating temperature An of the odd-number carbon crystal plate according to the target dry bulb temperature Tdset and the target wet bulb temperature Twset; setting an even number of carbon crystal plate overheating protection temperatures B3;

if the Tdset is less than or equal to 42 ℃, setting the target heating temperature of the odd-number carbon crystal plate to be A1;

if the temperature is 42 ℃ and Tdset is less than or equal to 54 ℃, the target heating temperature of the odd-numbered carbon crystal plate is set to be A2;

if the temperature is 54 ℃ and Tdset is less than or equal to 70 ℃, the target heating temperature of the odd-numbered carbon crystal plate is set to be A3;

(2) controlling the temperature of the dry balls in the baking process: in the tobacco leaf baking process, in a certain temperature detection period, detecting the actual dry bulb temperature Tdroom, the actual temperature B1 of the odd-numbered carbon crystal plate and the actual temperature B2 of the even-numbered carbon crystal plate in the tobacco containing chamber, and comparing the temperatures with the target dry bulb temperature Tdset, the target heating temperature An of the odd-numbered carbon crystal plate and the overheating protection temperature B3 of the even-numbered carbon crystal plate as follows:

if the Tdset is less than or equal to 42 ℃ and B1 is greater than A1+ B4, closing the odd-numbered carbon crystal plates;

if the Tdset is less than or equal to 42 ℃ and the B1 is less than or equal to A1-B4, opening the odd-number carbon crystal plates;

if the temperature is 42 ℃ and Tdset is less than or equal to 54 ℃ and B1 is greater than A2+ B4, the odd-numbered carbon crystal plates are closed;

if the temperature is 42 ℃ and Tdset is less than or equal to 54 ℃ and B1 is less than or equal to A2+ B4, opening the odd-numbered carbon crystal plates;

if the temperature is 54 ℃ and the Tdset is less than or equal to 70 ℃ and B1 is greater than A3+ B4, the odd-numbered carbon crystal plate is closed;

if the temperature is 54 ℃ and Tdset is less than or equal to 70 ℃ and B1 is less than or equal to A3+ B4, opening the odd-numbered carbon crystal plates;

if Tdroom is less than or equal to Tdset-B5 and B2 is less than or equal to B3, starting the even carbon crystal plates;

if Tdroom > Tdset + B5, the even-numbered carbon crystal plates are closed;

if B2> B3, the even carbon crystal plate is closed;

the detection of the next period is carried out in such a cycle;

wherein B4 is the opening and closing temperature control amplitude difference of the odd-number carbon crystal plates; b5 is the opening and closing temperature control amplitude difference of even carbon crystal plates;

(3) and (3) wet bulb temperature and sensible heat exchange control in the baking process: in the tobacco leaf baking process, in a certain temperature detection period, detecting the actual wet bulb temperature Tfrom in the tobacco containing chamber, and comparing the actual wet bulb temperature Tfrom with the target wet bulb temperature Twset:

if Tfrom > Twset + B6, the moisture exhausting fan is started;

if Tdroom is less than or equal to Tdset + B6, the moisture exhaust fan is turned off; the detection of the next period is carried out in such a cycle;

wherein, B6 is the temperature control amplitude difference of the circulating fan.

7. The temperature and humidity control method according to claim 6, wherein in the step (1), n of the target heating temperature An of the odd-numbered carbon crystal plates is 1, 2, 3; the adjusting range of A1 is 50-60 ℃; the adjusting range of A2 is 60-70 ℃; the adjusting range of A3 is 75-90 ℃.

8. The temperature and humidity control method according to claim 6, wherein the parameter range of B4 in the step (2) is 0-1 ℃; the parameter range of B5 is 0-1 ℃; the parameter range of B3 is 80-100 ℃.

9. The temperature and humidity control method according to claim 6, wherein the parameter range of B6 in the step (3) is 0-1 ℃.

10. The temperature and humidity control method according to claim 6, wherein the temperature detection period is t, and the parameter range of the temperature detection period t is 1-10 s.

Technical Field

The invention belongs to the technical field of tobacco leaf baking and modulation, and particularly relates to a carbon crystal plate heat supply-based tobacco leaf baking room with a heat recovery device and a temperature and humidity control method thereof.

Background

At present, most of bulk curing barns applied to various tobacco-producing areas in China are bulk curing barns or bulk curing barn groups built according to the file No. 2009/418 of national tobacco institute, coal is used as a main energy source, energy consumption is high, pollution is high, baking becomes a main pollution source of tobacco agricultural production, and therefore reduction of coal pollution in the baking process becomes a problem which needs to be solved urgently in the modern tobacco agricultural propulsion process. China is a high-energy-consumption country, and the country strives to promote and adjust an energy structure, so that tobacco leaf baking by using new energy instead of coal is a necessary choice. Among the new energy sources which can be utilized, the tobacco leaf baking by utilizing electric energy to replace coal is a simple and effective choice. The heat pump baking takes electric energy as energy, can realize clean baking of tobacco leaves, is adopted in many tobacco leaf producing areas in China at present, but the construction cost of a heat pump baking room is high, and the large-scale application of the heat pump baking room is limited; in addition, the heat pump baking is only the replacement of a baking heat source, the characteristics of forced ventilation and convection heat transfer of tobacco leaf baking are not changed, the interior and the surface of the tobacco leaf cannot be dried simultaneously, and the tobacco leaf is not soft after baking. Therefore, a novel tobacco leaf curing barn and a temperature and humidity control method are needed, and the curing quality of tobacco leaves is guaranteed while clean curing is realized.

Disclosure of Invention

The invention aims to solve the problems in the prior art and provides a carbon crystal plate heat supply-based tobacco leaf curing barn with a heat recovery device and a temperature and humidity control method thereof, so as to realize clean, economic and efficient curing of tobacco leaves; the tobacco leaf curing room provided by the invention can realize tobacco leaf curing by taking electric energy as an energy source, mainly taking far infrared radiation heat transfer as a main source and taking convection heat transfer as an auxiliary source, achieves simultaneous drying of the inside and the outside of the tobacco leaves while realizing clean curing of the tobacco leaves, improves the flexibility of the tobacco leaves and ensures the quality of the tobacco leaves.

The technical scheme of the invention is as follows:

a tobacco leaf curing barn with a heat recovery device and based on carbon crystal plate heat supply comprises a tobacco loading chamber, wherein sensible heat exchange devices and wet and hot air pipelines which are connected are arranged on the side walls of the two sides of the tobacco loading chamber;

And a cigarette loading chamber door for the operator to enter and exit is further arranged on one side wall body of the cigarette loading chamber, a circulating air duct and a circulating fan are installed on the inner side of the wall body opposite to the cigarette loading chamber door, and the lower part of the circulating air duct is connected with the circulating fan.

The existing curing barn generally has a heating chamber, and circulating air is heated and then enters a tobacco containing chamber through a circulating fan, so that tobacco leaves are heated. Different from the existing curing barn, the curing barn provided by the invention only has a tobacco loading chamber, does not have a heating chamber and also does not have a preheating chamber, and the carbon crystal heating plate of the curing barn is arranged in the tobacco loading chamber and does not need a heating chamber; when moisture is discharged, external fresh air is preheated through the sensible heat exchange device, and a preheating chamber is not needed.

The tobacco loading chamber is internally provided with a carbon crystal heating plate, a tobacco hanging beam, a circulating fan and a tobacco loading chamber door, and the wall body of the tobacco loading chamber is provided with a curing barn fresh air inlet, a circulating air duct and a moisture exhaust fan. The carbon crystal heating plates are arranged on the bottom surface and the inner side of the top of the tobacco containing chamber and used for heating tobacco leaves. The tobacco hanging beam is arranged in the tobacco containing chamber and used for hanging tobacco leaves. The curing barn fresh air opening is formed in the bottom of the side walls on the two sides of the tobacco containing chamber and used for allowing outside fresh air to enter the tobacco containing chamber during moisture removal. Dress cigarette room door setting is in dress cigarette room one side for operating personnel's business turn over during dress cigarette. The circulating fan is arranged on the inner side of the wall body opposite to the cigarette containing chamber door and used for providing power for circulating flow of air in the cigarette containing chamber. The circulating air duct is arranged on the wall body opposite to the cigarette containing chamber door, and the lower part of the circulating air duct is connected with the circulating fan and used for orderly and circularly flowing air in the cigarette containing chamber. The moisture exhausting fan is arranged on the upper parts of the side walls on the two sides of the tobacco containing chamber and used for exhausting moist and hot air in the tobacco containing chamber during moisture exhausting.

The sensible heat exchange device comprises a damp and hot air inlet, an external fresh air inlet, a heat exchanger, a damp and hot air outlet after heat exchange, a fresh air outlet after heat exchange and a fresh air pipeline. The sensible heat exchange device is arranged on the side walls of two sides of the tobacco loading chamber, the upper part of the sensible heat exchange device is connected with a damp and hot air pipeline through a damp and hot air inlet, and the lower part of the sensible heat exchange device is connected with a fresh air port of the curing barn through a fresh air outlet after heat exchange and used for recovering heat of damp and hot air exhausted from the tobacco loading chamber and heating the fresh air by utilizing the heat. The wet and hot air pipelines are arranged on the side walls of the two sides of the smoke containing chamber, are connected with a wet and hot air inlet of the sensible heat exchange device and are used for conveying wet and hot air discharged by the moisture exhaust fan to the sensible heat exchange device.

The wet and hot air inlet is arranged on one side of the sensible heat exchange device, is connected with the wet and hot air pipeline and is used for introducing wet and hot air discharged by the moisture exhaust fan into the heat exchanger. And the hot and humid air outlet after heat exchange is arranged at the opposite side of the hot and humid air outlet after heat exchange and is used for flowing out of the hot and humid air after heat exchange. And the external fresh air inlet is arranged on one side of the sensible heat exchange device and used for allowing external fresh air to enter the heat exchanger. The fresh air outlet after heat exchange is arranged on the oblique opposite side of the external fresh air inlet, is connected with the fresh air port of the curing barn and is used for allowing the fresh air after heat exchange to enter the tobacco holding chamber. The fresh air pipeline is arranged on two sides of the external fresh air inlet and the fresh air outlet after heat exchange and used for orderly flowing of external fresh air in the heat exchanger.

The carbon crystal heating plates are mounted in one or more blocks; the number of the circulating fans is one or more, the number of the circulating air ducts can be one or more, and the number of the circulating air ducts is consistent with that of the circulating fans; the number of the moisture exhausting fans is one or more.

The heat exchangers are one or more groups; the structure of the heat exchanger is a fin structure, and can also be other structures; the material of the heat exchanger is hydrophilic aluminum foil, epoxy resin material or other materials.

A temperature and humidity control method of a carbon crystal plate heat supply-based tobacco leaf curing barn with a heat recovery device comprises the following steps:

(1) setting baking parameters: setting target dry bulb temperature Tdset and target wet bulb temperature Twset in the tobacco loading chamber at different stages of tobacco leaf baking, and setting target heating temperature An (n is 1, 2 and 3) of the odd-number carbon crystal plates on the basis of the target dry bulb temperature Tdset and the target wet bulb temperature Twset; setting an even number of carbon crystal plate overheating protection temperatures B3;