CN101074410B - Filter-pressing process for producing malt extract during production of beer - Google Patents

Abstract

The invention relates to a fully automatic diaphragm wort filter press for pressing beer wort, and a beer saccharification mash filtration process realized by using the diaphragm wort filter press. Pressed state; feed, the mash pouring pump quickly fills the mash into the filter press with a large flow rate, and the mash is first pumped in from the feed port at the bottom of one side of the filter plate; press filtration, when the mash is full of the filter press , the wort flows out from the outlet hole on the other side through the filter cloth, and flows into the boiling pot through the balance tank. When no material is detected in the mash pot, the mash pouring pump is automatically closed; Press the grains layer, dry the grains layer; after the pre-compression, start to wash the grains, the water for washing the grains is pumped in by the pump, and flows out after passing through the grains layer; Automatically close; blow air from the diaphragm again to squeeze the bad layer, and dry the bad layer; then open the exhaust valve on the pipeline to discharge the compressed air in the diaphragm plate; after the exhaust is completed, open the filter plate, and the wheat grain will Get into trouble by yourself.

Description

Press filtration process for preparing wort in beer production

technical field

The invention relates to a fully automatic diaphragm wort filter press for filtering beer wort, and a beer wort filtration process realized by the diaphragm wort filter press, which belongs to the field of filter equipment and beer wort filtration process manufacturing.

Background technique

The wort filtration methods used in beer production mainly include lauter tank method and filter press method. At present, the wort filtration of most breweries in my country adopts the lauter tank method. In the past ten years, people have made a series of improvements to the structure and working method of the filter tank, but this filter method always has the disadvantages of long filter time, low yield and low degree of automation. Although various auxiliary measures have been taken, these problems have not been fundamentally resolved. With the development of breweries in the direction of large-scale, the capacity of saccharification equipment will also increase. This has brought great difficulty to traditional wort lauter. Because the larger the diameter of the filter tank and the longer the tiller arm, the greater the rotational torque. The torque is large, the diameter of the main shaft is large, the reducer is large, the load is large, and the motor is large, which increases the difficulty of manufacturing and increases the cost. In addition, the diameter of the filter tank is large, and when the filter sieve plate is installed, it is more difficult to ensure its levelness, which affects the filtering effect.

Invention content:

Design purpose: To avoid the shortcomings in the background technology, design a wort filter press specially used for beer saccharification wort filtration, and use the wort filter press to replace the traditional filter tank, so as to realize rapid wort filtration , High efficiency, energy saving, high quality, fully automatic.

Design scheme: In beer production, wort filtration is an important stage in the preparation of wort, and the wort is fermented and filtered to be beer. The so-called wort filtration means that after the saccharification process is over, the substances dissolved from the raw materials in the mash are separated from the insoluble grains in the shortest time to obtain clarified wort and a good extract yield. The wort filtration method used in beer production mainly includes the lauter tank method. In the past ten years, although people have made a series of improvements to the structure and working methods of the filtration tank, this filtration method always has the disadvantages of long filtration time, low yield, and low degree of automation. Auxiliary measures, but have not been able to fundamentally solve these technical problems. In order to solve this technical problem, this application replaces the traditional filter tank with filter press equipment in terms of structural design; in terms of technology, according to the process of beer saccharification and wort filtration, the filter tank is replaced by the continuous pressure filtration process of filter press The technique of intermittent filtration, to realize the design purpose of this application.

(1) Design of wort filter press: 1. Frame part: The frame part is the main body of the equipment, used to support the filter mechanism and connect other components. When the equipment is working, the piston in the oil cylinder pushes the compression plate to compress the filter plate, diaphragm plate and filter cloth between the compression plate and the thrust plate to ensure that the pressurized material liquid is pressurized in the filter chamber filter. The present application is equipped with a transition plate, and the number of different effective filter plates can be changed by moving the transition plate and pressing the wall plate, so as to adapt to different feeding quantities. 2. Filtration part: It is composed of filter plates, diaphragm plates and filter cloth sandwiched between the filter plates alternately arranged on the main beam. The alternate arrangement of filter plates and diaphragm plates forms several independent filter units—— filter chamber. At the beginning of filtration, the mash is driven by the mash pouring pump, and enters each filter chamber through the feed port of the thrust plate, and is filtered by the pressure generated by the mash pouring pump. Due to the function of the filter cloth, the solid remains in the filter chamber to form a filter cake, and the filtrate is discharged from the outlet hole. After the original wort is filtered, the compressed air is passed into the diaphragm plate, the diaphragm is bulged, the bad layer is squeezed, and the bad layer is pressed dry. In the case of not using the washing water, 80% of the bad layer can be recovered At the same time, the dross layer becomes thinner, which improves the efficiency of washing dregs. After the pre-compression is finished, the dregs washing starts. The dregs washing water is pumped in by the dregs pouring pump and flows out after passing through the dregs layer. Press the bad layer and dry the bad layer. In the process of using the filter press, the filter cloth plays a key role, and its performance and correct selection directly affect the filtering effect. 3. Pulling part: the automatic pulling mechanism part is composed of hydraulic motor, manipulator, transmission mechanism and pulling pause device. The hydraulic motor drives the transmission chain to drive the manipulator to move and pull the filter plates apart one by one. The pause device can control the stop and advance action during the drawing process at any time, so as to ensure the smooth realization of the drawing and unloading of the drawing mechanism. 4. Hydraulic part: The hydraulic part is the power device that drives the compression plate to compress and loosen the filter plate, and is equipped with a plunger pump and various control valves. When pressing the filter plate, the plunger pump motor starts, the piston rod moves forward, and presses the filter plate; when the oil pressure rises to the upper limit set by the system, the pump stops; at this time, the filter press enters the automatic pressure maintaining state; When the oil pressure drops to the lower limit set by the system, the plunger pump motor restarts to ensure the working pressure required for filtration; when returning, the plunger pump motor starts, the piston rod drives the compression plate to return, and the filter plate is loosened; When pulling the plate, the plunger pump starts, and the manipulator automatically reciprocates to pull the plate. When the last plate is pulled, the proximity switch installed on the main beam on the side of the thrust plate is triggered, and the manipulator automatically returns. When the manipulator returns to the side of the cylinder seat, it starts When it is in the starting position, touch the proximity switch to stop automatically. 5. Electric control part: The electric control part is the control center of the whole system.

(2) Use the wort filter press to realize the beer saccharification wort filtration process: 1. Preheating, the hydraulic system will compress the pressure plate and automatically maintain it within the pre-set pressure range. After the filtration process starts, press the filter The exhaust valve and feed valve on the top of the machine are opened at the same time, and at the same time, the mash pouring pump is started (hot water is preheated to the specified temperature), and water is injected into the filter press for preheating. After a period of preheating, the mash pouring pump automatically At the same time, the hot water valve is automatically closed. It should be noted that preheating is only performed during the first batch of equipment operation or when necessary. 2. Feeding: The mash pouring pump (frequency conversion) quickly fills the mash into the filter press with a large flow rate. The mash is first pumped in from the feed port at the bottom of one side of the filter press plate, and when it is full, it is pumped in through the upper and lower feed holes on one side at the same time, in order to reduce the oxygen absorption of the wort and make the mash flow in the filter press frame. Even distribution and smooth flow in the chamber. The wort passes through the filter cloth and flows out through the wort outlet hole on the other side. 3. Press filtration: The filtered wort flows into the boiling pot through the balance tank through the filter press. When no material is detected in the mash pot, the mash pouring pump is automatically closed. 4. Pre-compression: After the original wort is filtered, the compressed air is passed into the diaphragm plate, the diaphragm is bulged, the bad layer is squeezed, and the bad layer is pressed dry. It can be recycled without using the bad washing water. 80% of the extract in the bad layer is reduced, and the bad layer is thinned, which improves the washing efficiency. 5. Washing of grains: Keep the pre-compressed pressure and start washing grains. The water for washing grains is pumped in by the dumping pump, and flows out after passing through the grains layer; after the washing of grains meets the preset requirements, the dumping pump will automatically shut down. 6. Compression: Increase the pressure of blowing air from the diaphragm to squeeze the bad layer, and dry the bad layer. 7. Exhaust: Open the exhaust valve on the pipeline to discharge the compressed air in the diaphragm plate. 8. Unloading the bad: the bad cake is located in the filter chamber, and the filter chamber can only be formed when the filter plate and the diaphragm plate are closed. Therefore, the filter plates are pulled apart one by one under the action of the automatic plate pulling device, and the wheat grains fall into the grain hopper by themselves. 9. Turn off the filter press: After the above process is completed, the filter press will automatically push the filter plate to the filter press state to prepare for the next pot of filter press. 10. It is also necessary to consider the cleaning of the filter press, that is, the cleaning of the pipeline and filter cloth after the entire filter press runs for a week.

Technical solution 1: Press filtration process for producing wort from saccharification mash in the beer production process, (1) Close the wort filter press, the hydraulic system will automatically compress the filter plate and automatically maintain it at a certain pressure level, press filter The machine enters the state of automatic pressure maintenance; (2) Feeding: The mash pouring pump (frequency conversion) quickly fills the mash into the filter press with a large flow rate. Finally, it is pumped in from two feeding holes on one side at the same time, so as to reduce the oxygen absorption of wort and make the mash distribute evenly and flow smoothly in the frame chamber of the filter press. (3) Filtration: The filtered wort flows into the boiling pot through the balance tank through the filter press. When no material is detected in the mash pot, the mash pouring pump is automatically closed. (4) Pre-compression: After the original wort is filtered, the compressed air is passed into the diaphragm plate, the diaphragm is bulged, the bad layer is squeezed, and the bad layer is pressed dry. 80% of the leachate in the dross layer is recovered, and the dregs layer is thinned at the same time, which improves the efficiency of washing the dregs. (5) Washing of grains: keep the pre-compressed pressure, start to wash grains, the water for washing grains is pumped in by the dumping pump, and flows out after passing through the grains layer; after the washed grains reach the preset amount, the dumping pump will automatically shut down. (6) Compression: Increase the pressure of blowing air from the diaphragm to squeeze the bad layer, and dry the bad layer. (7) Exhaust: Open the exhaust valve on the pipeline to discharge the compressed air in the diaphragm plate. (8) Grain unloading: Open the filter plate, and the wheat grains will fall into the grain hopper by itself. (9) Turn off the filter press: After the above process is completed, the filter press will automatically push the filter plate to the filter press state to prepare for the next pot of filter press.

Technical solution 2: Fully automatic diaphragm wort filter press, which includes a frame part, a filter part, a drawing part, a hydraulic part and an electrical control part, and is characterized in that it is equipped with a movable press on the main beam of the frame part. Tight wallboard (7) and transition plate (8), can adjust the quantity of effective filter plate.

Compared with the background technology, the present invention has the advantages of high production efficiency, which can be completed within 2 hours from wort entering the filter press to unloading, and can be fully automatic filtered 12 to 14 times a day, which improves the saccharification efficiency; second, the product quality High, the wort enters from the lower side of the filter press, fills the filter chamber to form a closed system, and the entire filtration and washing process is in a closed state, which greatly reduces the oxidation of the wort during the filtration process and avoids the wort Oxygen absorption, good wort quality, ensures the pure taste of beer brewing; third, the yield rate of the saccharification chamber is increased to 100%, surpassing the lauter method; fourth, it can adapt to different auxiliary material ratios, because the traditional wort lauter Natural filtration, with wheat husk as the filter layer, so it is difficult to filter when the proportion of auxiliary materials increases, but this application has no special requirements for the proportion of raw materials and auxiliary materials, hammer milling can be used, and wheat, rice, corn, corn can be increased The proportion of auxiliary materials such as starch greatly reduces the cost of raw materials; fifth, the water consumption is small, and because the membrane filter plate is used to squeeze the dross layer, the water content of the dross layer is lower, which reduces waste water discharge; sixth, the washing efficiency is high, because the application Diaphragm extrusion is adopted, the dross layer is thin, the dregs washing effect is good, and the water used for dregs washing is significantly reduced; Seventh, the load adaptability is strong, and the operation elasticity is large, and its load can fluctuate between 70% and 110% of the normal load, even if the malt quality It is poor, and the filtration time can also be guaranteed; eighth, it has strong adaptability to the quality of raw materials, and can perform normal filtration under higher wort viscosity, and the filtration is not affected by the quality of raw materials. The original wort concentration can reach 26% to 30% %, suitable for high-concentration brewing; nine is high degree of automation, adopts PLC control, the operation is completed on the host computer, and the filtration and cleaning are fully automated; ten is the design of the integration of machine, electricity and liquid, which is not only reasonable in structure, but also simple and reliable in operation , and easy maintenance; Eleven is the design of the movable transition plate in the wort filter press, moving the plate and pressing the wall plate can change the number of different effective filter plates to adapt to different feeding volumes; Twelve is the frame High strength, long service life, guaranteed wort quality, improved saccharification yield, is an ideal substitute for lauter tanks and traditional filters in beer brewing.

Description of drawings:

Fig. 1 is a structural schematic diagram of a fully automatic diaphragm wort filter press.

Fig. 2 is a structural schematic diagram of the thrust wallboard.

Fig. 3 is a structural schematic diagram of a compact wallboard.

Fig. 4 is a structural schematic diagram of a filter plate.

Fig. 5 is a schematic diagram of the structure of the diaphragm plate.

Fig. 6 is a structural schematic diagram of the transition plate.

Explanation of reference numbers:

1. Thrust plate 2. Thrust wall plate 3. Diaphragm plate 4. Filter plate 5. Manipulator 6. Main beam 7. Compression wall plate 8. Transition plate 9. Compression plate 10. Oil cylinder seat 11. Hydraulic station 12 , exhaust through hole 13, feed through hole 14, feed branch hole 15, liquid outlet through hole 16, liquid outlet branch hole 17, sealing surface O-ring 18, O-ring 19, press medium inlet 20, polypropylene Diaphragm 21, liner 22, feed chute.

Detailed ways:

Embodiment 1: with reference to accompanying drawing 1～6. Fully automatic diaphragm wort filter press, which includes a frame part, a filter part, a pull plate part, a hydraulic part and an electrical control part. The frame part is mainly composed of a thrust plate 1, a compression plate 9, an oil cylinder seat 10 and a main beam 6 etc. parts are formed, and its manufacturing process is prior art, does not describe here. The filter part is composed of the filter plate 4, the diaphragm plate 3 and the filter cloth arranged on the main beam in a certain order. The filter plates and the diaphragm plates are arranged alternately to form several independent filter units—filter chambers. A sealing surface O-ring 17 is embedded around the filter plate 4 between the thrust plate 1 and the pressing plate 9, and the sealing surface contacts between the filter plate and the diaphragm plate. The automatic plate-drawing mechanism part is made up of hydraulic motor, manipulator 5, transmission mechanism and plate-drawing suspension device etc., and its manufacturing process is prior art, does not describe here. Hydraulic part 11 and electric control part are prior art, do not describe here. Thrust wallboard 2 adopts prior art molding and is located on the main beam 6 of the frame part, the transition plate 8 is located on the main beam 6 of the frame part, and the diaphragm plate 3 and the filter plate 4 in the filter part are provided with inlets and outlets up and down. The feed port through hole 13, the feed through hole 13 communicates with the filter chamber through the feed branch hole 14. The feed branch hole 14 located in the filter plate 4 is molded.

Debugging of the machine: 1. Check the whole machine: (1) Clean the hydraulic station 8 and the electric control box, clean the inside of the fuel tank, check whether the power supply, compression and return oil pipes are installed correctly, and whether the power wiring is safe and reasonable. (2) Clean the frame, filter plate and piston rod, check whether the arrangement of the filter plate is neat and correct; check whether the filter cloth is folded, and if so, flatten it. (3) Check whether the configuration of pipelines and valves such as feeding, air blowing and liquid outlet are correct and reasonable. 2. Electro-hydraulic debugging: (1) After the above required inspection items are confirmed to be correct, inject filtered and cleaned hydraulic oil into the oil tank to the specified oil level (about 55L), and turn on the main power switch. First, adjust the pressure of the high-pressure relief valve and low-pressure relief valve to the highest level, adjust the upper limit of the electric contact pressure gauge to 31MPa, press the "return" button, and observe whether the low oil pump motor rotates clockwise. Then, unscrew the safety relief valve counterclockwise, press the "tighten" button, observe whether the oil pump motor rotates clockwise and tighten the safety relief valve clockwise. (2) First, select the appropriate locking pressure of the high-pressure relief valve and the upper and lower limits of the electric contact pressure gauge according to the feed pressure. When adjusting, first unscrew the high-pressure relief valve counterclockwise, and slowly turn the high-pressure relief valve clockwise under the compressed state to make the pressure of the electric contact pressure gauge reach 27MPa, and then lock it. Then press the "return" button to unload the pressure in the oil cylinder, return to the end, adjust the low-pressure relief valve, when adjusting, first unscrew the low-pressure relief valve counterclockwise, press the "pull plate" button, slowly clockwise in the state of pulling the plate Turn the low-pressure relief valve to lock the pressure gauge to 4MPa, make the piston move repeatedly several times to remove the air in the cylinder, and finally set the pressure range of the electric contact pressure gauge). (The safety valve, high-pressure relief valve, low-pressure relief valve, and electric contact pressure gauge have all been adjusted before leaving the factory, and generally do not require adjustment by the user. If the set pressure needs to be changed, it can be adjusted according to the above method). (3) Let the piston rod drive the compression plate to move back and forth three times again, and check whether it will automatically stop when the oil pressure rises to the upper limit of the electric contact pressure gauge. Observe the drop of oil pressure. It is normal for the pressure drop rate to be less than 3MPa/10min during the first press. When the pressure drops to the lower limit of the electric contact pressure gauge), the motor (D) will automatically start the press. Speed ≤ 2MPa/20min is normal.

Embodiment 2: On the basis of embodiment 1, the pressure filtration process of producing wort by mash mash in the beer production process, (1) close the wort filter press, and the hydraulic system automatically compresses the pressure plate and maintains it automatically At a certain pressure level, the filter press enters the state of automatic pressure maintenance; 1) The hydraulic system automatically compresses the pressure plate and maintains it within the pressure range of 15MPa-18MPa, and the entire filter press is in a closed state; (2) Hot water Quickly inject the mash into the filter press through the pump and pass through the feed hole to preheat the filter plate of the filter press to prevent the temperature from decreasing and the viscosity increasing when the mash enters the filter press. At the same time, the mash entering the filter press does not mix with Air contact to avoid oxygen absorption of wort; (3) The mash is quickly filled into the filter press through the mash pouring pump, and the mash is first fed from the lower side corner of the filter plate, and the upper exhaust valve is opened at the same time Exhaust; (4) When the top of the filter press detects that the material is full in the filter press, the mash is fed from the upper and lower corners of one side, passes through the filter cloth, flows out of the wort from the upper and lower corners of the other side, and passes through the balance tank , into the boiling pot, when no material is detected in the mash pot, the mash pouring pump is automatically closed; (5) After the original wort is filtered, compressed air is passed into the diaphragm plate, and the diaphragm is bulged to squeeze the bad layer , dry the bad layer; (6) After the pre-compression, start to wash the bad, the washing water is pumped in by the mash pouring pump, and flows out after passing through the bad layer; After the type of beer is pre-set), the pouring mash pump is automatically closed, blowing air from the diaphragm again to squeeze the bad layer, and drying the bad layer; (8) the pressing plate retreats, and the plate pulling trolley automatically pulls each filter plate Open, the dross cake will fall into the wheat grain hopper by itself; (9) After all the plates are opened, the pressing plate will be automatically compressed to prepare for the next filtration.

The saccharification mash is quickly filled into the filter press with a large flow rate through the mash pouring pump. The mash is first fed from the feed hole at the corner of the lower part of the filter plate, and at the same time the upper exhaust valve is opened to exhaust. When the top of the filter press After detecting that the filter press is full, the mash is fed from the upper and lower corner feed holes on one side, passes through the filter cloth, flows out of the wort from the upper and lower corner discharge holes on the other side, passes through the balance tank, and enters the boiling pot. When no material is detected in the mash tun, the mash pouring pump will automatically shut down.

The production process of polypropylene diaphragm filter plate, the center liner is formed by mold, hydraulic press and plastic pressing, the blank of polypropylene diaphragm is formed by injection molding, and the hot plate welding machine is equipped with two heating plates, which can align the center liner upper and lower The sealing surface and the back of the upper and lower polypropylene diaphragms are heated at the same time, and the welding is completed once. After heat setting, the sealing surface and each hole of the diaphragm filter plate are processed.

It should be understood that: although the above-mentioned embodiments have described the present invention in more detail, these descriptions are only illustrative of the present invention, rather than limiting the present invention, and any inventions that do not exceed the spirit of the present invention fall within the scope of the present invention. Into the protection scope of the present invention.

Claims (7)

1. full-automatic diaphragm wheat juice pressure filter, it comprises rack section, filtration fraction, the arm-tie part, hydraulic part and electric control system, be provided with to be positioned at and movably compress wallboard (7) and rebound (8) on the rack section girder, change and to compress the quantity that wallboard (7) and the position-adjustable of rebound (8) in filter plates are effectively used filter plate, to adapt to different charging capacitys, it is characterized in that: the filtering chamber of filtration fraction is made up of van-type polypropylene filter plate (4) and polypropylene diaphragm plate (3), diaphragm plate diaphragm (20) adopts the polypropylene material die cast, filtration fraction septation plate (3) and screen plate (4) one sides have charging through hole (13) up and down, and charging through hole (13) props up hole (14) by charging and is communicated with filter chamber.

2. full-automatic diaphragm wheat juice pressure filter according to claim 1 is characterized in that: filter cloth sheet limit is enclosed with O shape circle (18) and embeds in the sealing groove on diaphragm plate (3) and the screen plate (4) in diaphragm plate (3) and the screen plate (4).

3. full-automatic diaphragm wheat juice pressure filter according to claim 2 is characterized in that: be welded into one-piece construction between two polypropylene diaphragms (20) of diaphragm plate (3) and liner plate (21).

4. the technology that adopts the described full-automatic diaphragm wheat of claim 1 juice pressure filter to produce wheat juice in the beer production is characterized in that:

Hydraulic efficiency system compresses filter plates automatically and maintains automatically in the pressure range that configures, and whole pressure filter is in air-tight state;

The pump of falling the wine with dregs is squeezed into pressure filter with hot water fast by feed port, and filter press filter board is carried out preheating; The pump of falling the wine with dregs charges into pressure filter fast with converted mash, and mash is first by the one side angle charging of screen plate bottom, top exhaust valve opening exhaust simultaneously;

When the pressure filter top detects mash is after pressure filter is filled, and mash is through filter cloth, goes out wheat juice by the angular flux up and down of opposite side, enters boiling pot;

When detecting no mash in the brew kettle, the pump of falling the wine with dregs cuts out automatically;

Former wort filtration feeds pressurized air after finishing in diaphragm plate, heaves by diaphragm, and the poor layer of extruding, the lamination that will be pickled with grains or in wine is done, and carries out precompression;

After the precompression end, wash poor water and pump into, pass the back outflow of poor layer and wash poor by the pump of falling the wine with dregs;

Washing poor reach processing requirement after, the pump of falling the wine with dregs cuts out automatically, from the diaphragm poor layer of extruding of blowing, the lamination that will be pickled with grains or in wine is dried once more;

Pressure strip retreats, and pulling car draws back every filter plate automatically, and poor cake promptly falls into the poor bucket of wheat voluntarily;

After all plate drew back, pressure strip compressed automatically, prepared to filter next time.

5. technology according to claim 4 is characterized in that: converted mash charges into pressure filter by the pump of falling the wine with dregs fast with mash, and mash is first by the one side angle feed port charging of screen plate bottom, top exhaust valve opening exhaust simultaneously; Detecting mash when the proofing unit at pressure filter top is after pressure filter is filled, and mash is by inferior horn feed port charging on the side, through filter cloth, last inferior horn discharge hole by opposite side flows out wheat juice, enter boiling pot through surge tank, when detecting no mash in the brew kettle, the pump of falling the wine with dregs cuts out automatically.

6. technology according to claim 4 is characterized in that: thrust wallboard top is provided with exhaust hole, discharges air in the pressure filter by this hole, greatly reduced the oxygenizement of wheat juice in filtration procedure, avoided the oxygen uptake of wheat juice, wort quality is good, has guaranteed that the brewage mouthfeel is pure.

7. technology according to claim 4 is characterized in that: after the former wort filtration end, feed pressurized air in diaphragm plate, heave by polypropylene diaphragm, the poor layer of extruding is not utilizing under the situation of washing poor water, 80% extract in the poor layer of recovery; Make the attenuation of poor layer simultaneously, improved and washed poor efficient.

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