Special Hull Separator

Special Hull Separator

Machine Semenovicha brand NVKH capacity of 80 t/d is designed to separate into fractions of milled sunflower seed oil industry facilities.

Specifications

The design semenovianus machine NVKH laid science-based principles of separation of rosanky to the husk and the kernel, based on differences in size and aerodynamic properties of these two components of rosanky. Easy husks, having large surface area and small mass, exhibits much greater than the core and windage in the air flow - the ability to move at relatively low air velocities. Therefore, if Rosanne contains particles of husk and kernel of the same size, in the air stream they are due to the large differences in the size of the sail can be clearly separated.

Rosanka emerging from selenoorganic machines (NRG or RTS-200), after hulling of sunflower seeds, is a mixture of various particle sizes: large, medium and small husks, of calaca, nemorosa, whole kernel, half kernel (broken), small particles of husk and kernel and oil dust. To separate such a complex mixture of kernel and husk in one go is impossible. So first, in the first stage, ruchanko divided by the linear dimensions in sizing (with progression), the sorting sieves, six fractions, containing the same size particles of husk and kernel. In the second phase, the suction of the machine (Wake) of calibrated fractions of rosanky in an inclined air stream, (each fraction separately, in a separate channel with adjustable airflow) to separate the particles from the husk particles nemorosa, cleavers and core due to their different aerodynamic properties of the sail.

The fine fraction (pass through a sieve Ø 3 mm) composed of very small particles of crushed kernels which are practically not containing husk (oil dust), do not share in the air stream and direct it to a sound fraction of the Wake passing (wpweekly pass), as even at very low speeds the air flow oil dust will be blown along with the husk and separation will not occur.

The machine (Fig.1) consists of wakeboards 1, drive wakeboards 2, screening 3 progression 14 and waveace pipe 4.

Wake is the suction part of the machine. Width of the Wake is divided into five separate chambers. Each chamber has three conical portion adjacent an outboard valve 6 to output the husk; valve 8 for regulating the amount of aspirated air supply valve 19.

Drive wakeboards consists of a fan and motor mounted on a rigid frame. The fan is driven by motor through V-belt transmission.

The screening is a metal body, suspended from the ceiling frame by four steel ropes 9 over the support 10. The frame is fastened to the ceiling by bolts. The ropes are attached to the screening plant by means of lock 11 and wedges 12. Inside the case is a three layer sieve frame 13.

In front of the screening on top is predressed 14 with two tiers of the sieve part. The suction inlet 15 is connected pregressive cloth sleeve by gravity feed product to the machine.

At the rear of the sieving located lead box 16 with an overflow valve, which is located under the outlet nozzle of the screening, connecting with the receiving tubes wakeboards cloth sleeves 17.

In the support frame (traverse) is installed bearings in which revolves a shaft with balance weights 18. Rotation of the shaft from the electric motor through V-belt transmission.

The technological process of separation of rosanky fractions (Fig. 3.) is as follows.

Milled on selenoorganic machines (NRC or RC-200) seeds (rosanka) received in the suction inlet of pregressive, and then the distribution is reset to the top tray of the sieve of progressive ( Ø 3 mm). Gathering (product that has not passed through the sieve) with the sieves arrives consistently on the lower sieve of progressive ( Ø 3 mm). Pass (product that passed through the sieve) of the upper and lower sieves progressive (wpweekly pass – the smallest part of the mixture of crushed kernels which are practically not containing husk) flows in inclined chutes, then combined, neveen is directed into the pipe, and no additional processing is combined with the nucleus coming out of semeno-wakeboards.

Rousanka, having predressed comes on the long top sieve with holes Ø 6mm (2/3 of the length of the layer) and moves to the front of the wakeboards. Smaller particles of rosanky fall through a sieve (pass) and (via) of the sieve pan is coming to the sieve of the second tier; larger, long passed through the upper part of the sieve, fall short top sieve Ø 7mm (1/3 the length of the layer) where the large particles (large husks, whole raw seeds Nidaros) are gathering, forming the first fraction of rosanky and sent to the first chamber wakeboards. The short passage through the sieve forms a second faction and is sent to the second chamber wakeboards.

The second tier of the sieve has holes of Ø 4.5 mm (2/3 of level) and Ø 5mm (1/3 of level). Gathering from these sieves are sent in the third chamber wakeboards. Pass sieves Ø 4.5 mm is supplied to the third tier of sieves sieving. The passage of Ø 5mm sieve is sent to a fourth chamber wakeboards. The third tier of the sieve has holes of Ø 3 mm. the Gathering with these screens is directed into the fifth chamber wakeboards. Pass sieves Ø 3 mm supplied on pallets in VNIIETO pipe and is discharged from the machine, bypassing Wake and unites with the nucleus coming out of semeno-wakeboards.

To reduce the time of contact of oilseeds dust with husk, on the first and second rows of 2/3 of the RAM installed sieve sieve trays. This reduces oil loss from the waste husks.

Thus from rosanky, freed from the coarse fraction caught in the pan long upper sieve middle sieve, stand third and fourth fractions, and even a smaller rosanka the long pan middle sieve is fed to the lower sieve, where gathering with sieves gives a fifth fraction and a sixth passage (the small fraction of rosanky), which is discharged from the machine, passing Wake.

Each of the five fractions of the product received at the Wake, falls into a designated chamber where the product of the winnowing air flow and the separation of husk from the kernel of the difference of aerodynamic characteristics.

The suction chamber semenovichi for treatment of rosanky there are five air channels that receive a fraction of rosanky obtained in the sieving. Each channel can be divided in three parts: reception, sedimentary and output.

In the receiving side of the step has four shelves (blinds) made of sheet steel. Between the shelves there are slits for the passage of air sucked by the fan from the premises of the shop. Shelves installed at an angle of 30-35° to the horizon.

Each of the factions of rosanky goes on the top shelf and then under the action of gravity poured from the shelf on the shelf. A stream of air, piercing the falling layer of rosanky, takes out her lighter particles (husk), and with the last of the shelves is free from the husks to the kernel. The angle of the shelves can vary in the regulation of work wakeboards: the steeper they are installed, the faster rosanka sprinkled on them, neprodolzhitelna processing air and the less the selection of peelings from rosanky.

The sedimentary portion of the aspiration channel is represented by three cones (pockets) flap removal products and vertical baffles to change the direction of movement of the entrained air particles of husk. The air flow created by the fan. For regulation of the air mode (air speed) in each channel includes a gate, a position which can be changed by the reception part wakeboards (where there are shelves) with the helm and cable.

After the passage between the shelves the air, carrying the husk, falls in expanding on the first (yerevanum) cone part of aspiration channel. The air speed is reduced, and in the first cone with fuzzy separation by aerodynamic properties together, removes coarse husk and kernel, partially entrained by the air stream, along with husk. When properly adjusted the operation content of the core in the first taper should not exceed 1-2 %. The fraction deposited in the first cone, must be submitted for re-separation and is called therefore purebeam.

Not settled in the first cone husks by air is carried on and passes between vertical partitions on the second and third cones. Hitting on them, husk slows the movement and settling. The deceleration of the husk is also due to the increase of the cross section of the aspiration channel over the cones, resulting in the second and third cones aspiration chamber settles husks. Air, which contain a very small husks and possibly fine particles of core (oil and dust), through the fan enters the cyclones.

The air velocity in the channels is regulated by more or less opening the damper, changing the height control valves and internal partitions, the inclination of the shelves (blinds) to the horizon. Following the adjustment to make in the second and third cones of all partitions in the husks was not the kernel (it was not the removal of kernel in the husk),

Thus, after aspiration wakeboards get the kernel (of second, third, fourth and fifth sections of the aspiration chamber), oil dust (VI fraction sieving), Nidaros (from the first section of aspiration chamber), pareva (from the first cone) and husk (from the second and third cones aspiration chamber wakeboards). The residue from air pollution control devices emitted from the fan aspiration chamber wakeboards, depending on the composition (oil dust or small husks) attached to the kernel or the husk.

Further operations on the fractions after the release of semeno-wakeboards.

The core of the seeds of the workers, inte dalneyshuyu is sent for processing. Nidaros, consisting mainly of integer and partially destroyed seeds, large husks, goes in the air-sieve separator (BUA-100), where additional separation of large hulls and large litter.

Enriched Nidaros with a lower husk content goes to re, structural collapse, sometimes even on a dedicated (control) rushka, the regulation which provides a more intense impact on unleashes seeds.

Peravai is sent for re-separation of control and Wake Peravia different from the working sizes of sieves and air suction mode in the camera

Husk, leaving husk cones wakeboards, separated into husk and kernel first in a separate dedicated screening wakeboards, and then in the aspiration column. After this, the husk is sent to the warehouse, and the kernel, along with kernel control wakeboards — on grinding.

With a good work aspiration wakeboards in samples of ruchenki taken to the shelves from the first to the fourth section, must not pass through a sieve with holes with a diameter of 3 mm. If that passage is in ruence of the first section, it indicates overload wakeboards, the presence of the passage in ruence of the second to fourth section fishery is an indicator of the poor performance of the screening the result of mismatched sizes of sieves.

Comparative analysis

The use of special semenovichi machine (NVKH) to separate into fractions of milled sunflower seeds applies only in the former Soviet Union.

All the criticisms to NVKH can be reduced to 2:

• additional obrazovaniu husk due to prolonged contact of the husk with crushed core in the process sieve separation into fractions

• need for large area premises, compared to technological schemes with consistent double separation on an air-tumbler screening separators, used by companies "Buhler" or "Allocco"

Not ideal. In theory it is. In real life – no. Everything is relative. Compare with the only real competitive industrial solution with consecutive double separation on an air-tumbler screening separators, used by companies "Buhler" or "Allocco":

• Yes, for circuits with serial dual separation of the desired areas smaller in size, but large in height,
• additional obrazovanie husk also takes place on the sieves of the separators, but the quality of the cleaning at universal in fact separators, worse than specifically designed for this purpose machine (see process description). The removal of the kernel with husk at least 0.5% more in the scheme with consecutive double separation, in comparison with the scheme using Semenovich machines. 0.5% losses husks for crushing plant with production capacity of 500 tons per day – a loss of at least 80 tonnes of oil per year, which in value terms is 64000 USD (at wholesale cost 800 USD per 1 ton of oil).

There are many theoretical concepts that try to solve the problem for more obkalyvanija peelings:

• centrifugal separator

• electrostatic electroseparation

• cascade tapered pneumoseparation ... etc

there is even a separate working installation, but:

• first, obrazovanie decreases, the purification performance deteriorates

• secondly, there is no evidence of industrial exploitation, which would be confirmed by the parameters obtained in the laboratory.

The problem of oil loss with husk, the plant recent years successfully solves the use of the beater-separator husk SL-40, for additional compartments pancake dust from the husks of sunflower.

Only this technological scheme provides the opportunity to achieve industrial production, quality indicators:

• the contents of the kernel in the husk - no more than 1 %,

• oil content of the husk without the kernel – not more than 1.2% higher Botanical,

• lesistost kernel – no more than 10%.

These are averages on a mixed raw material (factory mix) without prior calibration. When applying calibration or processing of large batches of uniform raw material, operational or regulation parameters of the Huller and semenovic during the manufacturing process, in practice, the achieved parameters:

• the contents of the kernel in the husk - no more than 0.8 %,

• oil content of the husk without the kernel – no more than 1% above the Botanical,

• lesistost kernel – no more than 8 %

As shown by many years of experience of hundreds of old and new oil crushing plants, process flow diagram of separation of sunflower rosanky to obtain the sound of the faction with the shell content of up to 10 %, based on semenovichi car brand NVKH – out of competition. And as a plant that only since 2000 have produced far over 1000 machines, I can safely say – there are prophets of the MACHINE in your country.

Concept semenovianus machine R1-ITU R1-MC-2T (probreza the NVKH), developed many decades ago and has proved its effectiveness, but time goes on, new materials and technologies, accumulating operating experience, the plant is constantly improving the design with specialists of leading scientific institutions. Examples of such studies can be found on the tab "materials"