Apparatus for thermal processing of bulk material

FIELD: food-processing industry and food-concentrates industry, in particular, equipment for thermal processing of bulk cereal products.

SUBSTANCE: apparatus has transportation mechanism, hopper-accumulator with dosing device, heating device and lateral baffles. Heating device is made in the form of linear or flat emitters arranged lengthwise of conveyor and perpendicular to transportation path. Vertical baffles are positioned in equally spaced relation at site adjoining emitters, lengthwise of transportation path, with said space being at least 0.5 the height of emitter above conveyor surface.

EFFECT: improved quality of ready product.

4 dwg

 

The invention relates to the processing industry and can be used for heat treatment of bulk grain products in the food and feed industries.

Known device for processing fodder grain containing sources of infrared radiation, the mesh conveyor, passing inside the heating chamber (Patent No. 1379116, UK, class. And 23 L 1/20, 1975) [1].

One of the drawbacks is the charring of the grain as it passes under the source of infrared radiation during processing, which reduces the quality of the finished product.

Also known device for processing fodder grain containing sources of infrared radiation, net conveyor device for loading and unloading grain, airtight side walls located above the conveyor (A.S. No. 904643, USSR, class. And 23 L 1/20, 1982) [2].

The drawback is the uneven heating of the mass of grain, resulting in lower product quality.

The most similar in design is the installation for the heat treatment of grain, containing a tape transporting mechanism and bar quartz lamps located above the ribbon along the length of the conveyor perpendicular to the direction of transportation (Patent No. 2056109, RF, CL And 23 K 1/00, 23 N 17/00) [3].

The disadvantage is the unevenness of oblojennosti the grain surface,located on the surface of the tape, in the transverse direction (along the lamps), which leads to uneven heating and reduce the homogeneity of the quality of the finished product. This is because the maximum irradiance, and therefore the maximum temperature of the product in the middle of the conveyor is higher than the side walls (figure 1).

Thus, the known device does not provide the same thermal regime of thermal treatment of granular product in the transverse direction of the conveyor and receiving a quality product.

The technical result, which is achieved by the invention is to improve the quality of the finished product.

This technical result is achieved in that the apparatus for the heat treatment of solids containing transporting mechanism containing a storage hopper with a metering device, a heat radiation device in the form placed along the length of the conveyor perpendicular to the direction of transportation of linear or planar emitters, and side reflectors entered in the setup emitters along the direction of transportation of vertical reflectors, breaking the treatment area in the transverse direction on a number of independent zones. This improves the uniformity of exposure of the processed product, which in turn leads to higher quality of the finished prod the KTA. In addition, the application of the fight on screens set in increments S=kN, where N is the height of the reflector above the conveyor, K - factor, reduces uneven oblojennosti in the treatment area, which also increases the quality of the finished product.

Figure 1 shows the distribution of oblojennosti under the emitters to the width of the conveyor with only the side screens. The maximum irradiance, in this case, and hence the temperature will be in the center.

Figure 2 shows the layout of the longitudinal vertical reflectors: 1 - conveyor, 2 - bar or flat emitters, 3 - longitudinal reflector (screen), 4 - side reflectors (screens).

Figure 3 presents the distribution of oblojennosti under the emitter width of the conveyor with the longitudinal vertical reflectors.

Figure 4 shows a view of the device from the side.

The device comprises a frame 1, a transporting mechanism 2, the hopper feeder 3 with a metering device 4, the unit emitters 5 are located above the conveyor containing chamber formed by the upper reflector 6, the pallet conveyor 7 and the side screens 8. Inside the unit emitters are linear or planar emitters 9, installed in a horizontal position above the conveyor along its length across the direction of transport. In addition, t is m the same set of longitudinal vertical reflectors 10 increments S=k· H.

The device operates as follows. Include the drive transmission mechanism 2 and the emitters of the block 5. The processed grain is fed into the hopper feeder 3, where metering device 4 is evenly distributed by a monolayer on the conveyor 2. In the flow of infrared radiation generated by the emitter 9, the grain is exposed to heat and light processing. Vertical longitudinal reflectors 10 smash a treatment area in the transverse direction on a number of independent zones (figure 3)that, due to the unambiguous decreasing the dependence of the uniformity of oblojennosti J (minimum oblojennosti in the treatment area to the maximum) from the relationship k=S/H (step height), improves the figure. At step S and, respectively, k tends to zero field oblojennosti tends to uniform, i.e. J tends to unity. As a result the temperature in the treatment zone is aligned and increases the quality of the finished product.

However, as smaller screens (increasing the number of sections) due to absorption of radiation by the screens, the number of which, respectively, in the treatment area increases, the irradiance in the center sections will fall, because most of the radiation energy will be absorbed by the screens, but don't get on the product. Figure 5 shows the influence of the relations K=S/H (step to the height of the lamp) on Energetichesky the efficiency section of W (the ratio of the energy getting the product to the energy emitted by the emitter within the section).

Sources of information

1. Great Britain Patent No. V, And 23 L 1/20.

2. The USSR, A.S. No. 904643, And 23 L 1/20.

3. RF patent No. 2056109, And 23 K 1/00, 23 N 17/00 (prototype).

Installation for the heat treatment of bulk products, including transporting mechanism, the storage hopper with metering device, a heat radiation device in the form placed along the length of the conveyor perpendicular to the direction of transportation of linear or planar emitters and side reflectors, characterized in that in the setup of a linear or planar emitters along the direction of transportation are vertical reflectors in increments of not less 0.5 height of the radiator above the surface of the conveyor.



 

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