CN101832700A

CN101832700A - Microwave drying mechanism

Info

Publication number: CN101832700A
Application number: CN200910127502A
Authority: CN
Inventors: 周爱英
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-03-11
Filing date: 2009-03-11
Publication date: 2010-09-15

Abstract

The invention relates to a microwave drying mechanism, which is characterized in that a rotary container is arranged in a furnace body in an inclined mode; the high end and the low end of the rotary container are provided with an inlet orifice and a discharge pipe respectively; in order to prevent microwaves from leaking at the inlet orifice and a discharge hole, microwave inhibitors are respectively arranged at parts where a feeding pipe and the discharge pipe are combined with the furnace body; the microwave inhibitors are circular ring sleeves with ring baffles, and the circular ring sleeves are respectively sleeved on pipe walls of the feeding pipe and the discharge pipe; the rotary container is made of a nonmetallic material with high heat resistance, excellent mechanical properties and easy penetration by microwave; fine ostioles are densely covered on the body of the rotary container, and a right quantity of baffles are uniformly distributed on the body of inner wall of the rotary container; and the baffles are parallel to the axis of the rotary container in a length direction. In order to prevent the inclined rotary container from generating axial float, an axial anti-thrust frame is arranged on the furnace body at the end of the rotary container, and the anti-thrust frame and an annular rotary support arranged on the body of the rotary container form the matching relationship of rotary movement.

Description

A kind of microwave drying mechanism

Technical field

The present invention relates to a kind of microwave mechanism, particularly a kind of microwave drying mechanism.Belong to the microwave application equipment technical field.

Background technology

At present, because the development of microwave technology utilizes microwave that the drying of material is obtained certain development and application.Microwave has the more characteristics of Fast Heating, homogeneous heating for the moisture content in the material, and has the high characteristics of the efficiency of heating surface, so microwave drying technology is widely used in agricultural product, Chinese medicine, rubber, plastic industry, and receives effect preferably.

Mainly be divided into two kinds at existing microwave dryer: the microwave dryer of batch (-type) or continous way, wherein the microwave dryer of continous way mainly adopts conveyer belt to carry out the conveying of material.In order to prevent the leakage of microwave, equipment openings at two ends aspect ratio is less, and the ventilatory function of equipment is relatively poor, thereby, the only suitable lower material of dry water content, though some equipment has been settled blast apparatus, but, because the defective of conveyor type continuous microwave drying equipment self, material still has many problems in the process of drying, at first, air-flow can only pass through from the upper surface of conveyer belt both sides or material, and the upper surface of material is by carrying out material cooling and taking away the steam of evaporation, though the material top layer has obtained good drying, but bottom material internal water steam on the conveyer belt, superfluous heat is difficult to carry out in time with air-flow, and it is overheated to be easy to generate, and causes material rotten; (2) because the equipment degassing function is poor, and steam (producing in the dry run) runs into the relatively low equipment inwall of temperature, the condensation residual titration causes by a material and crosses thermal denaturation easily, has influenced the quality of product; (3) material is carried the influence that is subject to ambient impurities on conveyer belt, simultaneously causes that easily device interior makes moist when handling the high material of water content, causes short circuit, has influenced the service life of product quality and equipment, and has reduced product quality; (4) for the bigger material of water content, because equipment is poor to material internal ventilation cooling capacity, water vapor diffusion speed is slow, has influenced the rate of drying of material, so steam, heat cause the material over-heat inside easily in the material accumulated inside; (5) layer thickness is owing to be subjected to condition restriction such as material properties, water content, so conveyor type microwave dryer production capacity is difficult to improve; (6) can not effectively contact with material owing to gas, so gas effciency is low, simultaneously, because dry materials is to carry out on the conveyer belt that opens wide, so gas recovery difficulty, cause environmental pollution easily.In addition, the time of delivery of material in drying oven can not be controlled effectively.

Summary of the invention

The objective of the invention is to: a kind of continuous microwave drying mechanism that solves graininess or heat sensitive material is provided, this heating using microwave mechanism, not only can improve the diffusion velocity of steam, reduce gathering of heat in the material, avoid material in the dry run because overheated and sex change, simultaneously, can improve the service life of equipment and the security of operation, simultaneously, can the speed of gyration that hold material container be controlled arbitrarily according to the concrete condition of dry materials.

For achieving the above object, the technical solution adopted in the present invention is: a kind of microwave drying mechanism, it is made up of body of heater, revolution container, axial thrust frame, preceding rotary support, taper joint, annular rotary support, microwave generator, driving wheel, follower, frequency control motor, feed pipe, discharge nozzle, microwave TVS etc.

Container tilts to lay in body of heater, high-end and low side at rotary container is provided with charging aperture and discharge nozzle respectively, in order to prevent that microwave from leaking from the feed inlet and outlet position, bound fraction at feed pipe and discharge nozzle and body of heater is provided with the microwave TVS respectively, the microwave TVS is the annulus cover of band annular baffle, its annulus cover is set on the tube wall of feed pipe and discharge nozzle, the revolution container is heat-resisting, satisfactory mechanical property, the nonmetallic materials that microwave penetrates are easily made, tiny aperture gathers on its health, on the body of its inwall, the baffle plate of uniform right quantity, baffle plate are parallel with the axis of revolution container in the longitudinal direction.For the revolution container can be rotated flexibly, in the bottom of taper joint preceding rotary support is set, for the revolution container that does not cause inclination produces axial play, on the end body of heater of revolution container, the axial thrust frame is set, thrust frame and the matching relationship that is arranged on the annular rotary support composition gyration on one's body of revolution container.In revolution container bottom appropriate location follower is installed, follower and driving wheel are formed intermeshing relation, and driving wheel is driven by frequency control motor.For the ease of steam in the discharge body of heater and unnecessary heat, at the bottom and the top of body of heater air inlet pipe and blast pipe are set respectively, microwave generator is arranged on the side of shaft.

Beneficial effect: owing to adopt continuous microwave drier, in dry run, material constantly rotatablely moves at container body, its surface constantly obtains upgrading, all have an opportunity the to be subjected to heating of microwave of material particles or powder on its surface, avoid material internal water steam to gather, thereby guaranteed the uniformity of dried material quality; Simultaneously, in rotary course, it is loose that solid accumulation becomes, and gas can fully contact with material, helps improving the diffusion of steam, has accelerated the speed of microwave drying; Particularly to heat-sensitive substance, because the material surface is constantly upgraded, air-flow and material are in reverse contact process, and air-flow is taken away part steam and heat, avoided of the generation of material inside, guaranteed the quality of dried material because of the superheating phenomenon that steam, heat accumulation caused.

Description of drawings

Accompanying drawing 1 is a schematic diagram of the present invention.

Shown in the figure: 1, body of heater; 2, revolution container; 3, axial thrust frame; 4, preceding rotary support; 5, taper joint; 6, annular rotary support; 7, microwave generator; 8, driving wheel; 9, follower; 10, variable-frequency governor; 11, feed pipe; 12, discharge nozzle; 13, microwave TVS; 14, baffle plate; 15, air inlet pipe; 16, blast pipe.

The specific embodiment

To turn round container (2) tilts to lay in body of heater (1), high-end and low side at rotary container (2) is provided with charging aperture (11) and discharge nozzle (12) respectively, in order to prevent that microwave from leaking from the feed inlet and outlet position, bound fraction at feed pipe (11) and discharge nozzle (12) and body of heater (1) is provided with microwave TVS (13) respectively, microwave TVS (13) is the annulus cover of band annular baffle, its annulus cover is set on the tube wall of feed pipe (11) and discharge nozzle (12), revolution container (2) is heat-resisting, satisfactory mechanical property, the nonmetallic materials that microwave penetrates are easily made, tiny aperture gathers on its health, on the body of its inwall, the baffle plate of uniform right quantity (14), baffle plate (14) are parallel with the axis of revolution container (2) in the longitudinal direction.For revolution container (2) can be rotated flexibly, in the bottom of taper joint (5) preceding rotary support (4) is set, for the revolution container (2) that does not cause inclination produces axial play, on the end body of heater (1) of revolution container (2), axial thrust frame (3) is set, thrust frame (3) and the matching relationship that is arranged on revolution container (2) annular rotary support (6) composition gyration on one's body.In revolution container bottom appropriate location follower (9) is installed, follower (9) is formed intermeshing relation with driving wheel (8), and driving wheel (8) is driven by frequency control motor (10).For the ease of discharging interior steam of body of heater (1) and unnecessary heat, at the bottom and the top of body of heater air inlet pipe (15) and blast pipe (16) are set respectively, microwave generator (7) is arranged on the side of shaft.

Claims

1. microwave drying mechanism, it is characterized in that: will turn round container (2) and in body of heater (1), tilt to lay, high-end and low side at rotary container (2) is provided with charging aperture (11) and discharge nozzle (12) respectively, in order to prevent that microwave from leaking from the feed inlet and outlet position, bound fraction at feed pipe (11) and discharge nozzle (12) and body of heater (1) is provided with microwave TVS (13) respectively, microwave TVS (13) is the annulus cover of band annular baffle, its annulus cover is set on the tube wall of feed pipe (11) and discharge nozzle (12), revolution container (2) is heat-resisting, satisfactory mechanical property, the nonmetallic materials that microwave penetrates are easily made, tiny aperture gathers on its health, on the body of its inwall, the baffle plate of uniform right quantity (14), baffle plate (14) are parallel with the axis of revolution container (2) in the longitudinal direction.

2. a kind of microwave drying mechanism according to claim 1, it is characterized in that: can rotate flexibly in order to make revolution container (2), in the bottom of taper joint (5) preceding rotary support (4) is set, for the revolution container (2) that does not cause inclination produces axial play, on the end body of heater (1) of revolution container (2), axial thrust frame (3) is set, thrust frame (3) and the matching relationship that is arranged on revolution container (2) annular rotary support (6) composition gyration on one's body.

3. a kind of microwave drying mechanism according to claim 1 and 2, it is characterized in that: follower (9) is installed in revolution container bottom appropriate location, follower (9) is formed intermeshing relation with driving wheel (8), and driving wheel (8) is driven by frequency control motor (10).

4. according to claim 1 or 3 described a kind of microwave drying mechanisms, it is characterized in that: for the ease of discharging interior steam of body of heater (1) and unnecessary heat, bottom and top at body of heater are provided with air inlet pipe (15) and blast pipe (16) respectively, and microwave generator (7) is arranged on the side of shaft.