A device for processing material in the form of particles containing a binder liquid fluidized bed

 

(57) Abstract:

The unit is equipped with> at least one nozzle for supplying containing binder liquid, accommodated in the housing in the area above generated during operation of the fluidized bed. The outlet nozzle in a generally downward direction is made in the form of a sieve plate. The nozzle is made in the form blockstring nozzle. The body is made mostly with circular cross-section. Area spray nozzles are oriented in the radial direction. Area spray extends only from one side of the vertical middle axis of the housing mostly along the radius of the beam. The nozzle is mounted for rotation around its center axis of the housing. The nozzle may be made in the form of a two-component blockstring nozzle with external mixing of components. A nozzle configured to supply the atomizing gas under pressure 2-7 bar and be atomised fluid under pressure 0,2-3,0 bar. The nozzle is also made for fluid flow, in the case of water supply, which is about 1.5 to 5.0 l/min, the Device may contain multiple plasmatronic nozzles, preferably 6-12 nozzles uniformly distributed over the circumference of the body. Nozzle with rachav the form of a sieve bottom placed the plate, equipped with a mainly radial slits for the passage of air. Plate mounted for rotation c to ensure coincidence of the positions of the slits and plasmatronic nozzles. The surface of the fluidized bed, at any time covered by the nozzles, is 10-25% of the total surface of the fluidized bed. Covered by one nozzle surface of the fluidized bed is 150-750 cm2preferably 600-700 cm2. The technical result is the supply of narrow and uniform particle size distribution of the treated material, hardly containing particles of a large size and almost dust-free. 9 C.p. f-crystals, 2 Il.

The invention relates to the processing of material in the form of liquid particles in a fluidized bed, in particular to a device for processing material in the form of particles containing a binder liquid fluidized bed.

Medicine, additives to food and other products often at the end of the manufacturing process are in the form of a powder or mixture of powders of a specific particle size distribution. Even if the product is chemically or from another point of view is suitable for use for certain purposes, it may still sometimes practice does not fully Express its deistvijah the problem of insufficient chemical resistance or danger of the powder material due to dust can be solved by granulating powder material, in case you need to supply particles of the granulate does not interfere with the protective substance.

A device for processing material in the form of particles containing a binder liquid fluidized bed, comprising a housing, provided with a bottom in the form of a bolt connected to the gas source, at least one nozzle for supplying containing binder liquid, accommodated in the housing in the area above generated during operation of the fluidized bed, and the outlet nozzle in a generally downward direction is made in the form of a sieve plate, means for trapping dust and at least one opening for release of gas placed in the upper part of the body (see U.S. patent N 3382093, CL 427213, 1968).

A disadvantage of the known device lies in the fact that it is not guaranteed in a very narrow and uniform particle size of the processed material, hardly containing particles of larger size and virtually dust-free.

The objective of the invention is to create a device for processing material in the form of particles containing a binder liquid fluidized bed, reliably providing a very narrow and uniform particle size of the processed material, pocts proposed device for processing material in the form of particles containing a binder liquid fluidized bed, comprising a housing, provided with a bottom in the form of a bolt connected to the gas source, at least one nozzle for supplying containing binder liquid, accommodated in the housing in the area above generated during operation of the fluidized bed, and the outlet nozzle in a generally downward direction is made in the form of a sieve plate, means for trapping dust and at least one opening for release of gas placed in the upper part of the body, due to the fact that the nozzle is made in the form of blockstring nozzle, and the body is made in the base with a circular cross-section, and area spray blockstring nozzles are oriented in the radial direction, and the area of the spray extends only from one side of the vertical middle axis of the housing mostly along the radius of the beam, and a nozzle mounted for rotation around its center axis of the housing.

Very good results are achieved when using blockstring nozzle, made in the form of a two-component blockstring nozzle with external mixing of components with which to be atomised liquid auxiliary gas stream is sprayed after leaving the nozzle and periodistica, probably, in spite of the auxiliary pressure of the atomizing gas, creates a well-distributed stream with the dynamics of droplets, in the case of transfer of powder to granulate together with the fluidized powder material, leading to a particularly uniform agglomeration.

Preferably plasmotroane nozzle is made with the possibility of sputtering gas under a pressure of 2 to 7 bar and be atomised fluid under pressure 0,2 - 3,0 bar. This plasmotroane nozzle can be made for fluid flow, in the case of water which is about 1.5 to 5.0 l/min

The proposed device is expediently contains several plasmatronic nozzles, preferably 6 to 12 plasmatronic nozzles uniformly distributed over the circumference of the body. Ploskostnye nozzle can use the levers to be mounted on the Central rotary shaft, and the rotary shaft and the levers can be hollow.

Under made in the form of a sieve plate of the device can be placed stove, equipped with a mainly radial slits for the passage of air, and a plate mounted for rotation providing matching provisions of the cracks and plasmatronic nozzles.

Suitable for carrying out the method of two-component ploskostyami nozzles are, for example, nozzle Spraying Systems company. In the experiments it was found that suitable nozzle is, among others, the nozzle of the specified company brand SUE 45, which has a spray angle 45o.

When processing additive to feedstuff used in the following example of the proposed method, the best is to download made in the form of a sieve plate 200 - 300 kg of powder raw materials on m2the bottoms. As gas fluidization in the case of the following example using nitrogen, and the temperature of the nitrogen as it enters the device is of powder material is heated to a temperature above 70oC, preferably 80oC. In the following with reference to the attached drawing is illustrated a schematic design of the proposed device according to one form of execution. The drawing shows: Fig.1 is a schematic vertical section through the main part of the device; Fig.2 is a schematic horizontal section through the device showing the installation of spray nozzles.

The device 1, a schematic section of which is shown in Fig. 1, provided with a cylindrical casing 2 for receiving subject material processing at the lower end covered by a plate 3 in the form of a sieve, the size of the cells which is selected to ensure that only a small dose intended for placement on the bottom of the raw material can pass through is made in the form of a sieve plate. The housing 2 has a top cover 4, which has at least one hole 5 for gas release, made in the wall 6 of the cylindrical body 2.

Under the bottom 3 has a gas chamber 7, provided with holes 8 for the gas inlet provided with not shown in the drawings blower. The dash-dotted line 9 in the upper part of the housing 2 is shown schematically a filter for trapping the supplied gas is top fed back into the tank, where is the material, or are going to order the other processing.

On average axis of the device in its lower area with a rotatably mounted driven from the engine 10 to the shaft 11, the bottom passing through the bottom 3 and above the bottom 3 provided with a spray arms 12, at the end of which has a one of a two-component nozzle 13. In Fig. 2 shows that the shaft 11 at equal angular distance around the circumference installed six of the spray arms 12, on which there are six nozzles 13, located at a distance of approximately half the radius between the shaft 11 and the wall 6 of the housing 2. For the supply of liquid in the nozzle 13 by means not shown in the drawing means of the shaft 11 and the spray arms 12 are hollow.

According to the drawing, the form of the housing 2 is not provided with a window for loading and emptying of the housing bottom can output side of the device, as shown in the drawing by a gap 14 in the wall 6 of the housing 2. The device is intended for intermittent operation.

Used for testing the device has a body diameter of approximately 2 m, that is, when considering the cross-section of the shaft 11, the bottom surface is estimated 3.1 m2. the quiet is installed approximately at the height of 145 cm above the bottom 3. That is, when the height of the generated fluidized bed of about 75 cm, the distance of the nozzles from the fluidized bed is approximately 70 see Nozzles operate with a gas pressure of approximately 4 bar. When liquid pressure of about 1.5 bar, water flow rate of each nozzle is approximately 4.7 l/min, and spraying with a 5% aqueous solution of methylcellulose flow rate of each nozzle depending on the liquid pressure is about 0.6 to 1.4 l/min

In used for field experience device, the drive shaft 11 is made to rotate at a speed ranging from 0.2 to 10 revolutions per minute.

The proposed device can be used for granulating powder additive to feedstuff containing bacitracin in the form of zinc salts. The following illustrates a typical operation of the device.

Example. Shown on the drawing, the device loads 712,5 kg powder additive to feedstuff containing bacitracin in the form of zinc salts. The powder has a particle size of 1 to 40 μm, and the main fraction of particles is on the order of 10 to 15 μm. In addition 5 to 30 wt.% bacitracin in the form of a zinc salt powder contains fermentation residues from the manufacturing process and carbsperserving heated to a temperature of 95oC nitrogen gas for about 20 minutes, heated to a temperature of 80oC.

To begin then injecting a fluid granulation using six plasmatronic nozzle, and the jet is directed downward in the direction of the fluidized bed. The nozzle rotating device with a speed of 6 revolutions per minute. Inject a total of 750 l of a 5% solution of methylcellulose temperature 30oC.

To create a fluidized bed in the device enter an increasing number of nitrogen gas with a temperature of about 100oC, first 40 m3/min, and at the end of 187 m3/min. and the Amount of injected fluid granulating in the beginning is 4 l/min, and every time after injection of 20 l feed rate increase of one liter per minute, up to 8 l/min While increasing the speed of the fluid granulating every time at the same time increase the amount of gas fluidization 10 m3/min, up to 90 m3/min. After injection of 120 litres granulating the speed of injection is reduced to 4 l/min and kept at this level. The time of injection of a total of approximately 3 hours.

Upon completion of the injection and flushing nozzles in a certain amount of water obtained is 2">

Granulometric composition of the obtained granulate is very uniform, and the proportion of particles with a size of 180 to 710 μm is 80%, which corresponds to the specified value. Size 125 to 1000 μm have 98% of the granulate and there is 0.01% of fine particle size less than 45 microns, which, however, also corresponds to the specified value.

1. A device for processing material in the form of particles containing a binder liquid fluidized bed, comprising a housing, provided with a bottom in the form of a bolt connected to the gas source, at least one nozzle for supplying containing binder liquid, accommodated in the housing in the area above generated during operation of the fluidized bed, and the outlet nozzle in a generally downward direction is made in the form of a sieve plate, means for trapping dust and at least one opening for release of gas placed in the upper part of the body, characterized in that the nozzle is made in the form of blockstring nozzle, the body is made mostly with circular cross-section, and area spray blockstring nozzles are oriented in the radial direction, and the area of the spray extends only from one side of the vertical middle axis to the LASS="ptx2">

2. The device under item 1, characterized in that the nozzle is made in the form of a two-component blockstring nozzle with external mixing of components.

3. The device according to p. 2, characterized in that plasmotroane nozzle configured to supply the atomizing gas under a pressure of 2 to 7 bar and be atomised fluid under pressure 0,2 - 3,0 bar.

4. The device under item 2 or 3, characterized in that plasmotroane nozzle is made for fluid flow, in the case of water supply, which is about 1.5 to 5.0 l/min

5. Device at least one of PP.1 to 4, characterized in that it contains several plasmatronic nozzles, preferably 6 to 12 plasmatronic nozzles uniformly distributed over the circumference of the body.

6. Device at least one of PP.1 to 5, characterized in that ploskostnye nozzle with the help of levers mounted on the Central rotary shaft.

7. The device according to p. 6, characterized in that the rotating shaft and the levers are hollow.

8. Device at least one of PP.1 to 7, characterized in that under performed in the form of a sieve plate is placed a plate, provided with a mainly radial slits for the passage of air, moreover, the l

9. Device at least one of PP.2 to 8, characterized in that the surface of the fluidized bed, at any time covered ploskostyami nozzles is 10 to 25% of the total surface of the fluidized bed.

10. Device at least one of PP.2 to 9, characterized in that covered one ploskostiam nozzle surface of the fluidized bed is 150 to 750 cm2preferably 600 to 700 cm2.

 

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