The expanding processing device of bypass curing
The utility model relates generally to former and the technology in the grain and food field of feed processing, particularly relates to the device of extrusion processing and the method for expanding processing.
The processing unit (plant) that existing food, feed extrusion are used comprises extrusion chamber, is provided with extruding screw in the extrusion chamber, and extrusion chamber one end is provided with charging aperture, and the other end is provided with the discharging cutter sweep.During work, extruding screw is pushed material to the discharging cutter sweep from charging aperture continuously, and material is expanded and be cut moulding.In this process, several stages such as material has successively passed through feeding, rubs up, final slaking, the pressure of material increases gradually, and temperature raises gradually, and under high temperature, high pressure, shear conditions, the rerum natura of material changes.Become pasty state by powdery, starch gelatinization, albuminous degeneration, cellulosic are partly degraded, refinement, and pathogenic bacteria are killed, and sanitary index improves, the toxic component inactivation; Final material is under powerful pressure differential effect, and material is by expanded, dehydration, cooling, dilated product short texture, porous, crisp, and palatability and local flavor are preferably arranged.But, all energy that material is extruded, stirs, shears, rubs all are the mechanical energy that derives from the input of extrusion equipment, the input of these mechanical energy has influence on the pressure and temperature of material, also promptly have influence on the curing degree of material, when the curing degree of material is not enough, the expanded quality of material will be affected, therefore, for guaranteeing that product has good quality, material itself should have enough energy.In the prior art, in order to reduce the mechanical energy energy consumption, some producers can add steam at the feeding end in material, because the interpolation of steam can improve the gelatinization degree of material, reduce the mechanical energy that needs in the material gelatinization process, but its amplitude are limited.Because: the space of Builking cavity is very little, and the time of staying of material in whole Builking cavity is very short, and the time of steam and material infiltration is very short, and like this, material becomes relatively limited because of the amount of cure of the effect lifting of steam.
The utility model content
The purpose of this utility model is to provide a kind of can reduce food, feed extrusion energy consumption, and can control the expanding processing device of the bypass curing of material curing degree as required, and a kind of method of utilizing this device to carry out expanding processing is provided simultaneously.
For this reason, the expanding processing device of the bypass curing that the utility model provides, it comprises extrusion chamber, be provided with extruding screw in the extrusion chamber, extrusion chamber one end is provided with charging aperture, the other end is provided with the discharging cutter sweep, described extruding screw is provided with the resistance material ring that matches with extrusion chamber, the resistance material ring is separated into extrusion chamber near extrusion chamber of charging aperture one side with near the second extrusion chamber of discharging cutter sweep one side, be provided with by-pass line between extrusion chamber and the second extrusion chamber extrusion chamber is connected with second extrusion chamber, described by-pass line is provided with steam heating cavity outward.
In the expanding processing device that the utility model provides, the resistance material ring is separated into extrusion chamber and second extrusion chamber with extrusion chamber, and material is after preliminary extruding, can enter in the by-pass line, under pressure state, the steam that material is passed in the steam heating cavity heats, make the rapid slaking of material, become pasty state, then, material enters in the second extrusion chamber through by-pass line, after being extruded the further pressurization of screw rod, from the discharging of discharging cutter sweep, the material instantaneous loss of pressure is expanded, and is cut moulding.Compared with prior art, the utility model can be regulated the pressure of the steam that feeds in the steam heating cavity, the curing degree that flow is controlled material, to adapt to the demand of different material; In by-pass line, after material was ripened, it was liquid or semi-fluid state, the good fluidity of material, and mechanical resistance is little, has reduced mechanical friction, has saved from the mechanical energy of the input of extruding screw, has reduced the wearing and tearing of extruding screw and extrusion chamber.Material can form the material envelope, the problem that the usefulness of having avoided the gap between extrusion chamber and the extruding screw to cause internal leakage to bring reduces.This device is energy-conservation, efficient, can be used for the expanding processing of materials such as grain, feed.
For conveniently regulating the water content of material, simultaneously, can in material, directly import heat energy, be provided with steam near the resistance material ring position on the described extrusion chamber and mend inlet.In case of necessity, can in material, mend the steam of certain pressure, promote the flowability of material slaking and energy strength imparting material by steam benefit inlet.
For making things convenient for pipe arrangement and heating, described by-pass line takes the shape of the letter U, and the steam inlet of steam heating cavity respectively is provided with one in the opening both sides of U-shaped, and the steam (vapor) outlet of steam heating cavity is arranged on the bottom of U-shaped.
For ease of regulating the pressure of material in the by-pass line, described by-pass line is provided with control valve.Can regulate the pressure of material in the by-pass line by the aperture of control valve.
Description of drawings
Fig. 1 is the structural representation of device described in the utility model.
Among the figure, 1 discharging cutter sweep, 2 second extrusion chambers, 3 control valves, 4 extruding screws, 5 resistance material rings, 6 steam are mended inlet, 7 extrusion chambers, 8 charging apertures, 9 transmission systems, 10,14 steam inlets, 11 steam (vapor) outlets, 12 steam heating cavity, 13 by-pass lines.
The specific embodiment
As shown in Figure 1, expanding processing device for bypass curing, comprise extrusion chamber, be provided with extruding screw 4 in the extrusion chamber, extrusion chamber one end is provided with charging aperture 8, and the other end is provided with discharging cutter sweep 1, and extruding screw 4 is provided with the resistance material ring 5 that matches with extrusion chamber, resistance material ring 5 is separated into extrusion chamber an extrusion chamber 7 of close charging aperture 8 one sides and is provided with steam near close resistance material ring 5 positions on 2, extrusion chambers 7 of second extrusion chamber of discharging cutter sweep 1 one sides mends inlet 6; Be provided with by-pass line 13 between extrusion chamber 7 and the second extrusion chamber 2 and an extrusion chamber 7 be connected the by-pass line 13 outer steam heating cavity 12 that are provided with second extrusion chamber 2; By-pass line 13 takes the shape of the letter U, and the steam inlet 10,14 of steam heating cavity 12 respectively is provided with one in the opening both sides of U-shaped, and the steam (vapor) outlet 11 of steam heating cavity 12 is arranged on the bottom of U-shaped, also is provided with a control valve 3 on by-pass line 13.
Extruding screw 4 links to each other with transmission system 9, and the power of motor is 15KW in the transmission system 9, and extruding screw 4 diameters are 60mm; The extruding screw 4 of same diameter needed the motor of configuration 30KW in the past; Through practical proof, because the setting of by-pass line 13 is arranged, can obviously reduce the power of motor, the heat energy of comparing and increasing reduces power of motor and has remarkable economy.
A) utilize the single serew bulker of a prior art to carry out pilot production, obtain relevant parameter.The main motor 160KW of prior art bulking machine, screw diameter 165mm, the draw ratio of screw rod is 13: 1, the screw arrangement zone is divided into feeding zone, rubs up the district, final slaking district;
The prescription of material sees Table one, and the material grinding fineness is 95% by 80 mesh sieves, and 99.5% crosses 60 mesh sieves, and 100% crosses 50 mesh sieves.Material at first carries out precuring in a common quality-adjusting device, the gelatinization degree of material is 45% behind the process quality-adjusting device, and material temperature is 95 ℃, and the moisture of material is 19%.
The prescription of table one material (weight percentage)
|Dregs of beans
|The young cake of dish
|Add up to
Material enters in the bulking machine and pushes, and the discharging nib in the discharging cutter sweep uses the 3.0mm diameter.Increase feeding capacity during production to improve main motor load, when main load-rate of motor was 95%, bulking machine output was 5.5 tons/hour as far as possible, and at this moment, the ton material power consumption of this bulking machine is 27.3kWh/t.The dilated product gelatinization degree that finally obtains is 100%, and swelling granular is full, attractive in appearance.
B) utilize the utility model technology to improve, and carry out pilot production, obtain relevant parameter at this single serew bulker.Equally, this single serew bulker, main motor 160Kw, screw diameter 165mm, the draw ratio of screw rod is 13: 1.
From the charging aperture feeding, to the inner steam 4% that adds of material, the time of staying is 5 minutes in by-pass line when material reaches an extrusion chamber end, and the pressure in this zone is 0.6Mpa, and steam pressure is 0.6Mpa in the steam heating cavity.All the other technological parameters are constant.
Increase feeding capacity during production to improve main motor load, when main load-rate of motor was 95%, the output of this device was 11.5 tons/hour as far as possible, and playing ton material power consumption is 13.2KWh/t.The dilated product gelatinization degree that finally obtains is 100%, and swelling granular is full, attractive in appearance.
The contrast test relevant parameter sees Table two
Table two production control parameter and testing result parameter
|Main motor current (KW)
|The gelatinization degree of dilated product (%)
|The output of bulking machine (t/h)
|Ton material power consumption (KWh/t)
||Drop to 47.8 %
Two groups of tests of A, B are compared, and the maturing process of material is mainly finished in not needing to import " by-pass line " of too much mechanical energy in the utility model.The slaking of this part mainly comes from material and keep the regular hour under certain temperature and certain pressure, and energy of its outer input mainly is the cheap steam of relative worth.So, utilize the utility model, under the constant situation of mechanical energy input, reach equally at the expanded back of material gelatinization degree under 100% the prerequisite, the production capacity of bulking machine promotes 1.5～3 times, and main motor ton material power consumption only is 33～67% of a prior art.