阅读说明：本技术 一种茶叶冷风烘干装置 (tealeaves cold wind drying device ) 是由 李玥楼 于 2019-10-19 设计创作，主要内容包括：一种茶叶冷风烘干装置,包括：干燥箱体、提升传送带、梯形干燥传送带、引风机、电动机、出料口、出料传送带、限位刮平装置和控制箱,本申请不需要通过加热设备或高温气体作为介质对茶叶进行干燥,采用形成强对流的常温空气对茶叶进行低温干燥,起到节能减排的效果,设计梯形干燥传送带延长茶叶在干燥箱体中的路径,从而使茶叶在常温空气中也能有足够的时间交换水份,实现低温干燥的目的,本申请利用限位刮平装置和横杆式传送带的特点,保证茶叶进入干燥箱体时的堆高,系统可以根据茶叶品种和品质的不同自动调整堆高,使堆高处于最适合干燥的高度。(A cold air drying device for tea leaves comprises: drying box, promote the conveyer belt, trapezoidal dry conveyer belt, the draught fan, a motor, the discharge gate, exit conveyor, spacing strickle off device and control box, this application need not dry tealeaves as the medium through firing equipment or high-temperature gas, the normal atmospheric temperature air that adopts to form strong convection current carries out the low temperature drying to tealeaves, play energy saving and emission reduction's effect, design trapezoidal dry conveyer belt extension tealeaves route in drying box, thereby make tealeaves also can have sufficient time exchange moisture content in normal atmospheric temperature air, realize the purpose of low temperature drying, this application utilizes the characteristics of spacing strickle off device and cross-bar conveyor, pile height when guaranteeing tealeaves to get into drying box, the system can pile height according to the different automatic adjustment of tealeaves variety and quality, make and pile the eminence in the height that is most fit for the drying.)

1. The utility model provides a tealeaves cold wind drying device which characterized in that includes: the drying box body (1), the lifting conveyor belt (2), the trapezoidal drying conveyor belt (3), the draught fan (4), the motor (5), the discharge port (6), the discharge conveyor belt (7), the limiting scraping device (8) and the control box (9), wherein the lifting conveyor belt (2) penetrates through the top of the side face of the drying box body (1) to be connected with the top of the trapezoidal drying conveyor belt (3) in the drying box body (1), the limiting scraping device (8) stretches across the lifting conveyor belt (2) and is fixed on the two sides of the lifting conveyor belt (2), the trapezoidal drying conveyor belt (3) is respectively provided with a plurality of return strokes, the trapezoidal drying conveyor belt (3) is respectively connected with the discharge port (6) from the top of the drying box body (1) to the bottom of the drying box body (1) in an end-to-end manner, a bracket (10) is welded on the side face of the drying box body, draught fan (4) are installed in the side and the top outside of drying box (1) respectively, draught fan (4) and the inside intercommunication of drying box (1), hygrometer (11) are installed on drying box (1) inside wall, exit conveyor (7) are located drying box (1) below, control box (9) are installed on drying box (1) outside support, control box (9) respectively with draught fan (4), trapezoidal drying conveyor (3) and hygrometer (11) electric connection.

2. The cold air drying device for tea leaves as claimed in claim 1, wherein: two openable maintenance doors (12) are arranged on the side face of the drying box body (1), and the maintenance doors (12) are opened and closed through pull buckles.

3. The cold air drying device for tea leaves as claimed in claim 1, wherein: the lifting conveyor belt (2), the trapezoidal drying conveyor belt (3) and the discharging conveyor belt (7) are all cross-bar conveyor belts.

4. The cold air drying device for tea leaves as claimed in claim 1, wherein: spacing strickle device (8) including support holder (13), electric lift pole (14) and scraper (15), support holder (13) and promotion conveyer belt (2) both sides fixed connection, install at support holder (13) both ends electric lift pole (14), scraper (15) both ends and electric lift pole (14) fixed connection.

Technical Field

The invention relates to the field of low-temperature drying equipment, in particular to a cold air drying device for tea.

Background

Tea leaf drying is one of the most important factors influencing tea leaf quality, the process and operation of the tea leaf drying are continuously improved for hundreds of years, from the most original manual operation to the current automatic operation, and from the traditional hot air drying to the current low-temperature drying, and the improvement of the processes enables the production efficiency and quality of the tea leaves to be continuously improved.

The basic principle of traditional tea leaf drying is as follows: the hot air is used as a medium to take away excessive moisture of tea leaves, so that the tea leaves are dried, and the tea leaves are invented from the first automatic tea leaf dryer in 1879 to an empire type dryer designed by Jackson in 1910. After the development history of more than 130 years, various types of tea leaf dryers appear, but the principles and the structures of the dryers are not changed greatly, and the dryers are only improved in the aspects of fully utilizing heat, saving fuel and the like. However, with the requirement of people on the quality of tea, the requirement of low-temperature drying is increasingly greater under the development condition of reducing the flavor of the tea, the low-temperature requirement cannot be met by traditional drying, the baking taste of the tea after high-temperature drying is heavier, the original quality of the tea is affected, and nutrient substances are easily decomposed under certain low-temperature conditions.

Disclosure of Invention

The invention aims to provide a low-temperature tea drying device.

A cold air drying device for tea leaves comprises: the drying box body, a lifting conveyor belt, a trapezoidal drying conveyor belt, a draught fan, a motor, a discharge port, a discharge conveyor belt, a limiting scraping device and a control box, wherein the lifting conveyor belt penetrates through the top of the side face of the drying box body and is connected with the top of the trapezoidal drying conveyor belt in the drying box body, the limiting scraping device stretches across the lifting conveyor belt and is fixed on two sides of the lifting conveyor belt, the trapezoidal drying conveyor belt is respectively provided with a plurality of return strokes which are respectively connected with the discharge port from the top of the drying box body to the bottom of the drying box body in an end-to-end manner, a bracket is welded on the side face of the drying box body, the motor drives the trapezoidal conveyor belt to work, the draught fan is respectively arranged on the side face and the outer side face of the drying box body, the draught fan, the control box is respectively electrically connected with the trapezoidal drying conveyor belt of the induced draft fan and the hygrometer.

Furthermore, two openable maintenance doors are arranged on the side face of the drying box body and are opened and closed through pull buckles.

furthermore, the lifting conveyor belt, the trapezoidal drying conveyor belt and the discharging conveyor belt are all cross-bar conveyor belts.

Further, spacing strickle off device includes support holder, electric lift pole and scraper, support holder and promotion conveyer belt both sides fixed connection, and electric lift pole installs at support holder both ends, scraper both ends and electric lift pole fixed connection.

Description of the working principle:

The raw materials is promoted to dry box top by the promotion conveyer belt, promote the in-process and meet with spacing strickle the device off, spacing strickle the thickness that the device was equallyd divide the heap with tealeaves according to demand automatic rising regulation tealeaves, the conveyer belt all adopts the cross bar formula conveyer belt dry with tealeaves heap, tealeaves gets into trapezoidal dry conveyer belt through the promotion conveyer belt, tealeaves slowly moves on trapezoidal dry conveyer belt, the draught fan starts this moment, top draught fan and side draught fan simultaneous working, produce the convection current in the drying cabinet, thereby moisture in the tealeaves is taken away along with the air and realizes the effect of low temperature drying, tealeaves after the drying is seen off after falling into exit conveyor from the discharge gate.

The invention has the advantages that:

(1) According to the method, the tea leaves do not need to be dried by heating equipment or high-temperature gas as a medium, and the tea leaves are dried at low temperature by adopting normal-temperature air forming strong convection, so that the effects of energy conservation and emission reduction are achieved.

(2) the trapezoidal drying conveyor belt is designed to prolong the path of the tea leaves in the drying box body, so that the tea leaves can exchange moisture in the normal-temperature air for enough time, and the aim of low-temperature drying is fulfilled.

(3) This application utilizes the characteristics of spacing strickleing off device and crossbar formula conveyer belt, guarantees piling height when tealeaves gets into dry box, and the system can pile the height according to the different automatic adjustment of tealeaves variety and quality, makes to pile the height in the most suitable dry height.

Drawings

Fig. 1 is a schematic structural diagram of the cold air tea leaf drying device;

FIG. 2 is a schematic structural view of the limiting and strickling device;

The designations in the drawings have the following meanings: 1-drying the box body; 2-lifting the conveyor belt; 3-trapezoidal drying conveyor belt; 4-a draught fan; 5-an electric motor; 6-discharging port; 7-a discharge conveyor belt; 8-limiting and leveling device; 9-a control box; 10-a bracket; 11-a hygrometer; 12-a maintenance door; 13-a support bracket; 14-an electric lifting rod; 15-scraper.

Detailed Description

A cold air drying device for tea leaves comprises: the drying box body 1, the lifting conveyor belt 2, the trapezoid drying conveyor belt 3, the draught fan 4, the motor 5, the discharge port 6, the discharge conveyor belt 7, the limiting leveling device 8 and the control box 9, wherein the lifting conveyor belt 2 penetrates through the top of the side face of the drying box body 1 to be connected with the top of the trapezoid drying conveyor belt 3 in the drying box body 1, the limiting leveling device 8 stretches across the lifting conveyor belt 2 and is fixed on two sides of the lifting conveyor belt 2, the trapezoid drying conveyor belt 3 respectively has a plurality of return strokes which are respectively connected with the discharge port 6 from the top of the drying box body 1 to the bottom of the drying box body 1 in an end-to-end manner, a bracket 10 is welded on the side face of the drying box body 1, the motor 5 is installed on the bracket 10, the motor 5 drives the trapezoid drying conveyor belt 3 to work, the draught fan 4 is respectively installed on, discharging conveyor 7 is located drying box 1 below, and control box 9 is installed on the support of drying box 1 outside, and control box 9 respectively with draught fan 4, trapezoidal drying conveyor 3 and 11 electric connection of hygrometer.

Preferably, two openable and closable maintenance doors 12 are arranged on the side surface of the drying box body 1, and the maintenance doors 12 are opened and closed through fasteners.

Preferably, the lifting conveyor 2, the trapezoidal drying conveyor 3 and the outfeed conveyor 7 are all cross-bar conveyors.

Preferably, the limiting and leveling device 8 comprises a supporting bracket 13, an electric lifting rod 14 and a scraper 15, the supporting bracket 13 is fixedly connected with two sides of the lifting conveyor belt 2, the electric lifting rod 14 is installed at two ends of the supporting bracket 14, and two ends of the scraper 15 are fixedly connected with the electric lifting rod 14.

Application examples

In order to show that the drying effect of the present application is excellent, the present application is compared with the drying effects of low-temperature vacuum drying and hot air drying, the present application is divided into 3 experimental groups respectively, each group dries 500 kg of tea leaves of the same variety and the same production process, the experimental group 1 adopts low-temperature vacuum drying equipment for drying, the experimental group 2 adopts traditional hot air drying equipment for drying, the experimental group 3 adopts the low-temperature drying device described in the present application for drying, the drying is respectively required to be performed until the water content of the tea leaves is 8% -10%, the average value is obtained by repeating the experiment for 3 times, the time required by the whole drying process (including the time of repeated loading and unloading) and the tea leaf conditions after drying are recorded for comparison, and the:

Group of	Time (h) required for the whole drying process	Status of dried tea
			Experimental group 1	9～11	Good color and luster, large energy consumption and insufficient fragrance of tea
Experimental group 2	4.5～6	Poor color and luster, high energy consumption, strong tea aroma and slightly scorched flavor
			Experimental group 3	5.1～6.2	Good color, low energy consumption, and refreshing tea fragrance

As can be seen from the table above, the experiment group 1 has long time consumption of low-temperature vacuum drying, and the tea leaves are not fragrant, but can keep better color and luster of the tea leaves; the tea dried by hot air in the experimental group 2 has poor color and luster and large energy consumption, but the time consumption is short and the tea fragrance improving effect is good; the tea processed by the low-temperature drying device in the experimental group 3 has good color and luster, low energy consumption and short time consumption, and can keep the original faint scent of the tea and also has certain aroma-improving effect.