CN2119622U

CN2119622U - Negative pressure hot air blow type cylinder drier

Info

Publication number: CN2119622U
Application number: CN 91233058
Authority: CN
Inventors: 宁光昌
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-12-31
Filing date: 1991-12-31
Publication date: 1992-10-21

Abstract

The utility model relates to a negative pressure hot air blow type cylinder drier used for drying materials in small factories of feed, food, agricultural and sideline products, or chemical lines industries, which belongs to the mechanical manufacturing field. A negative pressure induced draft loop is installed, and based on the structure of the present fire roasting type cylinder drier; the loop comprises a preheating pipe rotated by a cylinder, a throttle valve, a nozzle, a hollow mandrel and a draught fan. The material port is sealed by a cover, the air is turned into drying hot blast by passing through the preheating discharge pipe under the pumping action of the draught fan in use; the hot blast sprays to the heat wet material writhed in the cylinder after changed into hot blast jet stream by passing through the nozzle; the moisture is sucked out of the cylinder though the hollow mandrel. The negative pressure hot air blow type cylinder drier can supply the hot blast to itself; the airflow and the machine can stir together; thus, the energy is saved, the work efficiency is high, and the coast is low.

Description

Negative pressure hot air blow type cylinder drier

The utility model relates to negative pressure that a kind of medium or small factory oven dry material that is applicable to feed, food, rural area product or chemical industry the uses formula cylinder dryer that spurts, and belongs to mechanical manufacturing field.

Existing roller dryer by its material mode of heating, generally can be divided into formula or air-flow heated type two big classes between directly-heated.Directly-heated type is directly to add thermal material with electric heater in cylinder, indirect-heating is to roast drum outer wall with stove fire, conducted heat to material by barrel, these two kinds of drying ovens are main thermal source without hot blast all again, and cylinder is shorter, simple in structure, need not to join in addition hot-blast stove, but just because of do not have hot air source, the air inducing air blast that moisture overflows by gravity-flow ventilation or only the air distribution amount is very little in the tube, this is unfavorable for the eliminating of fully contacting of wet feed and air and moisture very much, so this " vexed stir-fry formula " small-sized cylinder dryer efficient is not high.On the other hand, air-flow heated type cylinder dryer, cylindrical shell is not heated by stove fire, and the hot blast that is come by hot-blast stove is blasted cylinder, when adding thermal material, is rushing out the material in turning over, but has increased evaporation surface and continued operation greatly.But its major defect is: as the air of heat transfer medium, thermal capacity is very little, desiring provides enough evaporation latent heats to material, certainly will need the hot air source of the big air quantity of high temperature and very long cylinder and high performance exhaust cleaner, thereby drying system cost height, it is also higher to consume energy, and is unsuitable for medium or small factory and selects for use.Chinese patent 88205828.2 " sleeve rotary dryers " has the coaxial affixed cylinder of multilayer, can shorten body length exponentially, Chinese patent 88202582.5 " swinging spray hot wind moving material dryer " has been installed hot-blast main and a plurality of hot blast nozzle in tube, can organize the hot gas diffluence to rush out material better, but these two kinds of dryers still can not be avoided said flow heated type drying machine structure complexity, the system cost height, high shortcoming consumes energy.

The objective of the invention is the major advantage of above-mentioned indirect-heating and air-flow heated type cylinder dryer to be rolled into one and avoid its major defect, for medium or small factory provides a kind of efficient, energy-conservation, inexpensive drying plant.

Purpose of the present invention can realize by following measure: the negative pressure induced wind loop is installed on indirect-heating cylinder dryer, and this loop is formed by be loaded on the preheating comb, air throttle, nozzle, hollow mandrel and the air-introduced machine that rotate around the cylinder thereupon.

Because in the indirect-heating cylinder dryer, the required evaporation latent heat of moist material water evaporates is mainly from the barrel of being roasted by stove fire, therefore desire seething by air-flow aggravation material to quicken evaporation and to take except that moisture, just not needing to resemble provides big air quantity and high wind-warm syndrome by hot-blast stove the air-flow heated type dryer, but should not use cold wind or useless flue gas.Therefore the preheating comb is installed around cylinder, comb is with heated by stove fire and flue gas, be connected at the cylinder other end under the swabbing action of the air-introduced machine on the hollow mandrel, air is preheated to dry-heat air through comb, form the hot gas jet via nozzle and spray to material in turning in the cylinder, making thermal material be the shape that spurts in slightly being the tube chamber of negative pressure fully contacts with heated drying air, the very fast drying of material and the tube intracavity gas be tending towards steam-laden gradually, temperature reduces, and extracts out outside the tube through the hollow mandrel subsequently.

In order to regulate the air inducing amount, the wind speed of wind-warm syndrome and control hollow mandrel suction moisture reduces the too much loss of material, need establish air throttle in the air inducing loop, and air throttle should be installed in the air inlet place of preheating comb or the upstream of nozzle, makes and produces negative pressure preferably in the chamber.

One end of cylinder is by the sealing of the sealing ring of bearing both sides, and the other end will expect mouthful to obturage by end cap, thereby in drying course, except that the air inducing loop, drum cavity and atmosphere partition are to keep negative pressure state.

In order to organize hot gas jet flow field in the tube better, the nozzle axis in the air inducing loop should not be parallel with cylinder axis, should be suitable angle with the cylinder axis direction.

Below in conjunction with the description of drawings specific embodiment.

Structure as shown in the figure, 1, for the preheating comb, 2, be air throttle, 3, be cylinder, 4, be bearing, 5, be the hollow mandrel, 6, be air-introduced machine, 7, be sealing ring, 8, be decelerator, 9, be sprocket wheel, 10, be support wheel, 11, be nozzle, 12, be flight, 13, be end cap, 14, smoke barrier, 15, be petticoat pipe and support compositions such as (not drawing among the figure), the characteristics of this machine are to have installed the negative pressure induced wind loop, and this loop is by be installed on the preheating comb 1 that rotates around the cylinder device, air throttle 2 thereupon, nozzle 11, hollow mandrel 5 and air-introduced machine 6 are formed.Right-hand member is a charging aperture, obturages with end cap 13 during oven dry, adds the effect of the sealing ring 7 of upper bearing (metal) 4 both sides, makes a chamber except that the air inducing loop, cuts off with atmosphere.During by the charging of material mouth, cylinder just changes, cylinder counter-rotating during discharging, be subjected to thermal material rotation on one side under cant timber 12 drives, Yi Bian turn over, by the swabbing action of air-introduced machine 6, air is through air throttle 2, and preheating comb 1 and nozzle 11 spray to the material that landing is got off, and material obtains drying very soon like this.Moisture is carried low amounts of dust secretly and is discharged cylindrical shell by air-introduced machine, and simple and easy cyclone dust collectors or feeding sedimentation condensation chamber can be installed in the air-introduced machine downstream.

By above explanation as can be known, in the dryer of the present invention, the wet stock evaporation latent heat is mainly from stove fire.The air inducing loop structure that installs additional is also uncomplicated, extract dry-heat air by stove fire and flue residue heat, make full use of this hot blast and have to absorb and carry the function of steam and the function of spurting, saved hot-blast stove, also favourable water evaporates under subnormal ambient, thus reach efficient, energy-conservation, inexpensive effect.

Claims

1, a kind of negative pressure formula cylinder dryer that spurts, form by cylinder, mandrel, end cap, bearing, support wheel, transmission mechanism, enclosure and support, it is characterized in that being equipped with the negative pressure induced wind loop, this loop is by be loaded on the preheating comb 1 that rotates around the cylinder thereupon, air throttle 2, nozzle 11, hollow mandrel 5 and air-introduced machine 8 are formed.

2, the negative pressure according to claim 1 formula cylinder dryer that spurts is characterized in that air throttle 2 is installed in the upstream of air inlet place, air inducing loop or nozzle 11.

3, the negative pressure according to claim 1 formula cylinder dryer that spurts is characterized in that sealing ring 7 is equipped with in the both sides of bearing 4, and during drying operation, end cap 13 will expect mouthful to obturage, thereby drum cavity cuts off with atmosphere except that the air inducing loop.

4, the negative pressure according to claim 1 formula cylinder dryer that spurts, the interior ring that it is characterized in that hollow mandrel 5 and bearing 4 maintains static moving, and outer shroud rotates with cylinder.