RU2217490C2 - Flow line for obtaining of protein-vitamin product - Google Patents

Abstract

FIELD: reprocessing of alcohol production wastes. SUBSTANCE: flow line has pipe for supplying of distillery slops and discharge of solid and liquid processing products, as well as intermediate vessel, dehydrating device, drier, filtrate concentrating device arranged at liquid reprocessing product discharge pipe, pelletizer, and ready product collector, which are connected with one another through transportation equipment. Dehydrating device is made in the form of vacuum filter and filtrate concentrating device is formed as separator. Flow line is equipped with evaporator and barometric condenser having water supply manifold, hot dry air supply-discharge device providing reaction of air with solid products, ventilation chamber and at least one cyclone. Evaporator and barometric condenser are arranged at vacuumizing manifold between vacuum filter and vacuum pump. Liquid processing product discharge pipe is connected to evaporator and made in the form of closure comprising intermediate vessel for liquid processing product. Hot dry air supply-discharge device is arranged at solid processing product discharge line. Ventilation chamber is arranged between pelletizer and ready product collector. First inlet of at least one cyclone is connected to ventilation chamber via fan, second inlet is connected via other fan to drier, and third inlet is connected to hot dry air supply-discharge device. Outlet of cyclone is connected to pelletizer. EFFECT: increased efficiency, enhanced reliability in operation and improved quality of product. 3 cl, 1 dwg

Description

 The invention relates to the alcohol industry, and in particular to technological processes for processing waste from alcohol production.

 The known process of low temperature dehydration of substances in vacuum [Description of the invention to the patent of the Russian Federation 2134854, F 26 5/06, publ. 08/20/1999, Bull. 23]. The process is carried out in a vacuum volume, in which the holder of the processed substance, the heater, the condenser, the condensate collector and the heat exchanger are placed.

 The technological process is notable for its considerable complexity and extremely low productivity.

 The known process for the disposal of molasses stillage [Description of the invention to the copyright certificate of the USSR 357216, C 12 F 3/10, publ. 10/31/1972, Bull. 33]. The equipment chain includes a mixer, a centrifuge, a defecator, a second centrifuge, a saturator, an ion exchanger, an aerotank and a sump. Utilization products include organic fertilizers, purified water and semi-finished products for the production of sodium glutamine and betaine.

 This process can be considered as an alternative to the common and popular (mainly abroad) technology for the evaporation of post-alcohol stillage.

 A known standard scheme for producing protein-vitamin product, which consists in drying the post-alcohol distillery stillage [Fuks A.A. Technology of alcohol production. - M .: Pishchepromizdat, 1951, p. 483-488, 534-536, fig. 147]. Drying equipment includes a scraper conveyor installed in the technological sequence, on which the main mass of water is separated, a filter apparatus and a drying drum. For disposal of the entire liquid part of the stillage, the possibility of using evaporators is provided.

 The drying process of post-alcohol stillage stillage is characterized by high energy intensity and low productivity, as a result of which it is currently replaced by more economical and productive methods.

 A known method of manufacturing high-quality animal feed [Description of the invention to US patent 4552775, NKI 426/624, publ. 12.11.1985], which was carried out on a production line including lines for supplying post-alcohol stillage and discharging solid and liquid products of its processing and interconnected by means of interoperational transfer dryer, a sifting device and a drum in which part of the dried product is mixed with fresh stillage coming in from the stripping column, thus, one part of the protein-vitamin product is diverted to the packaging, and the other is returned back to the manufacturing process. Obviously, the use of such technology in conditions of periodic shutdowns of alcohol production, for example, for carrying out preventive measures, etc., requires significant costs for its restarting, while ensuring the continuity of the production cycle will be difficult.

 The closest in combination of essential features of the claimed invention will be a production line that implements a method for the production of feed additives for livestock (protein-vitamin product) [Description of the invention to US patent 5260089, NKI 426/624, publ. 11/09/1993], including lines for supplying post-alcohol stillage and removal of solid and liquid products of its processing and interconnected by means of interoperational transfer device for dewatering, made in the form of a centrifuge, a drying drum, an associated device for concentrating the filtrate, made in the form of an evaporator located at the exit of the highway for the removal of liquid processed products, a granulator and a collection of finished products.

 To date, this technology is the most advanced, but its main disadvantages include limited technological capabilities in terms of increasing the productivity of the line, for example, the possibility of using this technology at distilleries with a productivity of 4-6 thousand decalitres per day is doubtful. Also, centrifuges as dehydration devices do not provide a sufficient degree of separation of solid products from the post-alcohol stillage, which requires further evaporation of the liquid fraction to separate the remaining dry substances, and this makes the process of producing a protein-vitamin product very energy-intensive. In addition, while ensuring high line productivity, the use of many centrifuges is required, which leads to significant noise, which negatively affects the working conditions of the staff.

 The problem solved by the first invention of the group is to further expand the operational and technological capabilities of the production line for the production of protein-vitamin product.

 The technical result is to increase the productivity of the line, increase the reliability of its operation, reduce the energy intensity of production and improve the quality of the protein-vitamin product. Additionally, working conditions for staff will improve.

 To solve the problem in a well-known production line for the production of protein and vitamin product, including lines for supplying post-alcohol stillage and removal of solid and liquid products of its processing and interconnected means of interoperational transfer an intermediate tank, a device for dehydration, a dryer, a device for concentrating the filtrate, located at the outlet of the line for the removal of liquid processed products, a granulator and a collection of finished products, a device for dehydration is made in an ide of a vacuum filter, and the device for concentrating the filtrate is in the form of a separator, in addition, the line is equipped with an evaporator and a barometric condenser with a water supply line, a device for supplying and removing hot dry air, made with the possibility of interaction of air with solid products, a ventilation chamber and, at least at least one cyclone, while the evaporator and the barometric condenser are located on the vacuum supply line between the vacuum filter and its vacuum pump, the liquid discharge line the processed products are connected with the evaporator and made in the form of a shutter, including an intermediate tank for liquid processed products, a device for supplying and removing hot dry air is located on the line for removing solid processed products, and a ventilation chamber is located between the granulator and the finished product collector, one of the entrances at least one cyclone is connected to the ventilation chamber through a fan, a second inlet through another fan is connected to a dryer, a third input is connected to a device water-discharge of hot dry air, and the cyclone outlet is connected to a granulator.

Besides:
- the vacuum filter is made with a descending cloth and a continuous tissue regeneration system;
- the line is equipped with a mixer located in front of the granulator and connected to the separator.

 The invention is illustrated by the drawing, which shows the General scheme of the production line for the production of protein-vitamin product.

 The production line for the production of protein-vitamin product includes lines 1, 2 and 3 for supplying post-alcohol stillage stillage (1) and removal of solid (2) and liquid (3) products of its processing and interconnected by means of interoperable transmission (various conveyors, for example, screw conveyors, tape, pipelines, etc., are conventionally shown in the form of lines ending with arrows) an intermediate tank 4, a device 5 for dehydration, a dryer 6, a device 7 for concentrating the filtrate, located at the outlet of the line 3 for draining liquid processing products, pelletizer 8 and 9, a collection of finished products.

 In accordance with the inventive concept, the dewatering device 5 is made in the form of a vacuum filter 5, for example, with a converging web and a continuous tissue regeneration system and a vacuum pump 10. Vacuum filters 5 are serially produced by Russian enterprises, while it is not known from the prior art about their use in alcohol industry for the separation of post-alcohol distillation stillage into solid and liquid fractions, which, obviously, is associated with the need to resolve existing contradictions of a technical nature. The device 7 for concentrating the filtrate is made in the form of a separator 7, in addition, the line is equipped with an evaporator 11 and a barometric condenser 12 with a water supply line 13, a device for supplying and removing hot dry air, made with the possibility of interaction of air with solid products - the so-called preliminary ( or preparatory) drying, ventilation chamber 15 and at least one cyclone 16.

 The evaporator 11 and the barometric condenser 12 are located on the line 17 for supplying vacuum between the vacuum filter 5 and the vacuum pump 10, the line 3 for removal of liquid processed products is connected to the evaporator 11 and is made in the form of a shutter 18, including an intermediate tank 19 for liquid processed products, a supply device 14 -discharge of hot dry air is located on the line 2 of the removal of solid processed products from the vacuum filter 5 in front of the dryer 6, and the ventilation chamber 15 is located between the granulator 8 and the collector 9 g otovoy products.

 The intensification of drying processes involves the use and movement of large volumes of air, with which a very large amount (up to 10%) of light dry fractions of a protein-vitamin product can be transported, which must be trapped. For this, one of the inputs 20 of at least one cyclone 16 is connected to the ventilation chamber 15 through a fan 21, the second input 22 (or the input of the second cyclone is not shown conventionally) through another fan 23 is connected to a dryer 6, the third input 24 (or the second the input of the second cyclone, or the input of the third cyclone is also not shown conditionally) is connected to the device 14 for supplying and removing hot dry air, and the output 25 of the cyclone 16 (or the outputs of the cyclones mentioned alternatively and conditionally not shown) is connected to the granulator 8.

 The operational capabilities of the line are further expanded after it is equipped with a mixer 26, which must be placed in front of the granulator 8 and connected to the dryer 6 and the separator 7.

 We will consider the operation of the line as an example.

 After alcohol, for example, grain bard from the distillation apparatus (not shown conventionally) through line 1 enters the intermediate tank 4, where it is accumulated in the volume necessary for the smooth operation of the device 5. As a device 5 for dehydration, a BOP type vacuum filter with a converging cloth and a continuous tissue regeneration system manufactured by the Russian company Uralkhimmash from the city of Yekaterinburg was used, designed to filter products other than post-alcohol stillage.

 After the vacuum filter 7, the post-alcohol distillation stillage is divided into two streams, one of which includes a solid product, and the other a liquid, the so-called filtrate. The solid product looks like a loose mass with a moisture content of 40% to 80%. The filtrate includes 2-4% solids, some of which are in suspension, and some are dissolved.

 The filter 7 is provided by a vacuum pump 10. To obtain a deeper vacuum, the line 3 is equipped with an evaporator 11 and a barometric condenser 12. The line 3 at the outlet of the evaporator includes a valve 18, which is made in the form of a rather long vertically installed pipe, the lower end of which is lowered into the intermediate tank 19 with filtrate. This technical solution allows a fairly simple way to obtain a vacuum value reaching minus 0.95 atm, in contrast to the simple use of a vacuum pump 10, which provides about minus 0.6 atm.

 From the canvas of the vacuum filter 5, the solid product is fed to the dryer 6, for example, rotary-drum, by means of an interoperational transfer means (this is usually a screw conveyor). Prior to this, the solid product, as it moves by the conveyor, interacts with hot, dry air. The device 14 provides this possibility due to, for example, conventional blowing of a moving and stirred product or blowing directly at the exit from the web, etc. After such pre-treatment, the product loses up to 5% moisture, ideally representing a small lump wet from the inside and covered with a dry or relatively dry crust on the outside, after which it enters dryer 6, significantly increasing its productivity and improving working conditions, because significantly slows down the formation of caramel on its walls. After dryer 6, the product has a moisture content of 20-25% and can be granulated in device 8. From granulator 8, the product enters the ventilation chamber 15, where it is brought to a moisture content of 10-14%, after which it enters the collection 9 of the finished product, is packaged on the device 27, for example, in bags or poured in bulk in a lockable container and transported to a warehouse or consumer. The protein content in the finished product can reach 40%.

 A certain amount of solids (up to 2.5%) remains in the filtrate. In the past, this product was routed along line 3, as a rule, to a sump and only partially to boilers (not shown conditionally), replacing about 75% of the water added to the grain. For this reason, the production line is equipped with a device for concentrating the filtrate — a separator 7 installed at the outlet 28 of line 3. Separator 7 allows you to additionally separate up to 2% of dry matter from the filtrate, which can be used as an independent product in the form of slurry with a moisture content of 75% protein content up to 54% or enter the technological process - mixer 26, where after mixing with a solid product the protein is enriched to its content, for example, 44% and above. In this case, the granulator receives a wetter starting product. Product granules become denser and heavier.

 To increase the yield of the product, the exhaust air from devices 14, 6 and 15 passes through a cyclone-type air purifier - cyclone 16, in which solid particles of protein-vitamin product are separated, which subsequently enter granulator 8. Almost pure air is released into the atmosphere. To intensify cleaning, the ventilation chamber 15 and the dryer 6 are additionally equipped with fans 21 and 23.

 The implementation of the invention allows to obtain a protein-vitamin product that is of high quality, while the production line can be equipped with equipment that provides the necessary capacity of distilleries, for example, a vacuum filter 5 of the appropriate capacity, or their required quantity. The technology implemented by the production line minimizes the damage to the environment. All this allows us to conclude that the invention will take its rightful place among the technologies that ensure the disposal of post-alcohol stillage.

Claims (3)

1. A production line for the production of protein-vitamin product, including lines for supplying post-alcohol stillage and removal of solid and liquid products of its processing, and interconnected means of interoperational transfer of an intermediate tank, a device for dehydration, a dryer, a device for concentrating the filtrate located at the outlet lines for removal of liquid processed products, a granulator and a collection of finished products, characterized in that the device for dewatering is made in the form of a vacuum filter RA, and the device for concentrating the filtrate is in the form of a separator, in addition, the line is equipped with an evaporator and a barometric condenser with a water supply line, a device for supplying and removing hot dry air, made with the possibility of interaction of air with solid products, a ventilation chamber, and at least one cyclone, while the evaporator and the barometric condenser are located on the vacuum supply line between the vacuum filter and its vacuum pump, the liquid product removal line is processed Ki is connected with the evaporator and is made in the form of a shutter that includes an intermediate tank for liquid processed products, a device for supplying and removing hot dry air is located on the line for removing solid processed products, and a ventilation chamber is located between the granulator and the finished product collector, one of the entrances at least one cyclone is connected to the ventilation chamber through a fan, a second inlet, through another fan, is connected to a dryer, a third input is connected to a hot-water inlet-outlet device about dry air, and the cyclone outlet is connected to a granulator. 2. The line according to claim 1, characterized in that the vacuum filter is made with a converging web and a continuous tissue regeneration system. 3. The line according to claim 1, characterized in that it is equipped with a mixer located in front of the granulator and connected to the separator.