CN107166911A

CN107166911A - A kind of pneumatic dryer

Info

Publication number: CN107166911A
Application number: CN201710330612.0A
Authority: CN
Inventors: 张平亮
Original assignee: Wuxi Professional College of Science and Technology
Current assignee: Wuxi Professional College of Science and Technology
Priority date: 2017-05-11
Filing date: 2017-05-11
Publication date: 2017-09-15

Abstract

The invention provides a kind of pneumatic dryer, its simple in construction, action component is few, stable operation and be easy to control, can effectively shorten drying time, improve drying efficiency, drying effect is good；It includes feed screw, hot-air mouthful, outlet, it also includes the shell being installed on base, the hot-air mouthful is arranged at the base side, the shell is built with inner tube to form ring cavity structure, the feed screw for being installed on the shell side is connected with the annular chamber, the base is hollow structure, the shell outer wall in the base cavity pocket is provided with the first air inlet, classification mouth is provided with said inner tube top, and the drying device outside the shell is connected by connected classification pipe, the drying device includes at least two drying tubes, the caliber of the every drying tube is different, described in the head end connected with the classification pipe the second air inlet is being provided with drying tube, the outlet is set described in end on drying tube.

Description

A kind of pneumatic dryer

Technical field

The present invention relates to a kind of dry materials processing machinery, specially a kind of pneumatic dryer.

Background technology

With the development of dry technology, ancient box-type drying equipment is progressively replaced by pneumatic conveying dryer, air-flow Drying equipment is quickly grown, extensively in chemical industry, and food is used in pharmaceuticals industry, and the operation principle of pneumatic conveying drying is to utilize heat Air is fully contacted with powdery or graininess wet stock in flow process, is conducted heat and is passed between gas and solid material Matter, so that wet stock reaches dry purpose, but the air-flowing type drying equipment of existing use, complicated, action component Many and fluctuation of service, control is not easy to, especially for remaining to the free-flowing particulate matter material in gas, such as moist shape Monosodium glutamate, citric acid and glucose during state etc., its drying time length, drying efficiency are low, effect is poor.

The content of the invention

In view of the above-mentioned problems, the invention provides a kind of pneumatic dryer, its simple in construction, action component is few, operation Stablize and be easy to control, can effectively shorten drying time, improve drying efficiency, drying effect is good.

Its technical scheme is such：It includes feed screw, hot-air mouth, outlet, it is characterised in that it is also wrapped Include the shell being installed on base, the hot-air mouth is arranged at the base side, the shell is built with inner tube to be formed Ring cavity structure, the feed screw for being installed on the shell side is connected with the annular chamber, and the base is hollow Structure, the shell outer wall in the base cavity pocket is provided with the first air inlet, and classification mouth is provided with said inner tube top, and The drying device outside the shell is connected by connected classification pipe, the drying device includes at least two drying tubes, The caliber of the every drying tube is different, and the second air inlet is being provided with drying tube described in the head end connected with the classification pipe, The outlet is set described in end on drying tube.

It is further characterized by, and the drying device includes the first drying tube being sequentially connected, the second drying tube, the 3rd Drying tube, the caliber of first drying tube is more than the caliber of second drying tube and less than the pipe of the 3rd drying tube Footpath, the classification pipe is connected with first drying tube, and second air inlet is arranged on first drying tube, the row Outlet is arranged on the 3rd drying tube；

The shell, inner tube are round tube；The classification pipe is bend pipe；

First air inlet at least 4, and it is uniformly distributed in the shell outer wall.

The beneficial effects of the invention are as follows aqueous powder is sent into annular chamber by feed screw, hot by shell is entered Air is sucked, and is thrown toward shell wall, and collision is produced to it and is rubbed, and completes preliminarily dried, is reached and is divided then along shell Level mouth, and risen to by being classified pipe in drying device, drying tube of the particle in motion process Jing Guo different tube diameters size, The movement velocity of grain alternately changes between acceleration and deceleration, air-flow is increased with intergranular relative velocity with heat transfer area, So as to enhance heat transfer, mass transfer rate, drying time is shortened, drying efficiency is improved, drying effect is good, whole equipment structure Simply, action component is few, stable operation and be easy to control, also allow for manufacturing and repair.

Brief description of the drawings

Fig. 1 is the structural representation of the present invention.

Embodiment

As shown in figure 1, the present invention includes feed screw 1, hot-air mouth 3, outlet 10, it also includes being installed on base Shell 2 on 4, hot-air mouthful 3 is arranged at the side of base 4, and shell 2, to form ring cavity structure, is installed on built with inner tube 12 The feed screw 1 of the side of shell 2 is connected with annular chamber 13, and base 4 is hollow structure, the outer wall of shell 2 in the cavity of base 4 Provided with 4 the first air inlets 5, and be uniformly distributed in the outer wall of shell 2, be provided with the top of inner tube 12 classification mouth 14, and by with its Drying device outside the classification connection shell 2 of pipe 11 of connection, drying device includes at least two drying tubes, the pipe of every drying tube Footpath is different, is provided with the head end drying tube connected with classification pipe 11 on the second air inlet 6, end drying tube and sets outlet 10；Shell 2, inner tube 12 are round tube；Classification pipe 11 is bend pipe, and classification pipe 11 is arranged at the upper end right side of inner tube 12.

Drying device includes the first drying tube 7, the second drying tube 8, the 3rd drying tube 9 being sequentially connected, the first drying tube 7 Caliber be more than the second drying tube 8 caliber and less than the 3rd drying tube 9 caliber, classification pipe 11 connect with the first drying tube 7 Logical, the second air inlet 6 is arranged on the first drying tube 7, and outlet 10 is arranged on the 3rd drying tube 9.

The course of work of the present invention is that aqueous powder enters shell 2 by feed screw 1, wherein in the middle of because of two sections of spirals There is material, cause material to seal, can prevent hot blast from causing dust collector to outflow, be not easily blocked；It is suitable along the internal toroidal cavities 13 of shell 2 Hour hands are moved from below to up, multiple air inlets 5 on the entrance shell 2 of hot-air mouthful 3, and aqueous powder is by the high speed of entrance shell 2 Hot-air is sucked, and is thrown toward the inwall of shell 2, and collision is produced to it and is rubbed, and preliminarily dried, arrives then along shell 2 upwards Up to classification mouth 14；A small amount of non-siccatives decline to be handled again together with the aqueous powder of dog-house again, is done at the beginning of most of aqueous powder After dry, replace the thermal current and powder for reducing and promoting with the pulsed pneumatic drying pipe expanded using vortex speed with caliber using shell 2 Shape or graininess wet stock are fully contacted in flow process, and it is in suspended state, dielectric gas and solid in hot blast to make material Heat and mass transfer is carried out between material, so that being dried around each particle of wet stock；The is risen to through being classified pipe 11 One drying tube 7, then through rising to the second drying tube 8 into the secondary blast of the second air inlet 6, air-flow flows through at a relatively high speed, Particle is produced accelerated motion, when its accelerated motion ends, dry caliber sudden enlargement, rise to the 3rd drying tube 9, due to Particle motion inertia, make this section of endoparticle speed be more than air velocity, particle in motion process, due to gas-flow resistance without It is disconnected to slow down, until its deceleration ends, so repeat alternately to make drying tube caliber reduce with expanding, the movement velocity of particle is existed Slow down again after acceleration, in variable-speed motion state, make air-flow and intergranular relative velocity and heat transfer area larger, radiating surface Product is small, and loss is few, gas, it is solid between heat transfer coefficient and heat transfer surface area it is all very big, it is especially suitable so as to enhance heat transfer, mass transfer rate Dried for many heat sensitive materials, its intake air temperature can be higher than fusing point, softening point and the decomposition point of material, higher to obtain Productivity and heat transfer efficiency, finally dry powder discharged by outlet 10.

Claims

1. a kind of pneumatic dryer, it includes feed screw, hot-air mouth, outlet, it is characterised in that it also includes peace Loaded on the shell on base, hot-air mouth is arranged at the base side, and the shell is built with inner tube to form annular Cavity configuration, the feed screw for being installed on the shell side is connected with the annular chamber, and the base is hollow structure, The shell outer wall in the base cavity pocket is provided with the first air inlet, is provided with classification mouth on said inner tube top, and pass through Connected classification pipe connects the drying device outside the shell, and the drying device includes at least two drying tubes, every The caliber of the drying tube is different, and the second air inlet, end are being provided with drying tube described in the head end connected with the classification pipe The outlet is set on the drying tube.

2. a kind of pneumatic dryer according to claim 1, it is characterised in that the drying device includes being sequentially connected The first drying tube, the second drying tube, the 3rd drying tube, the caliber of first drying tube is more than the pipe of second drying tube Footpath and the caliber for being less than the 3rd drying tube, the classification pipe are connected with first drying tube, and second air inlet is set It is placed on first drying tube, the outlet is arranged on the 3rd drying tube.

3. a kind of pneumatic dryer according to claim 1, it is characterised in that the shell, inner tube are round tube； The classification pipe is bend pipe.

4. a kind of pneumatic dryer according to claim 1, it is characterised in that first air inlet at least 4, And it is uniformly distributed in the shell outer wall.