Filter press filtering system for improving freshness of wort
By adding a balance tank in the filter press system, extending the exhaust pipe, increasing the water supply line and sewage valve, and adjusting the feeding and discharge method of the filter press, the problem of excessive oxygen content during wort filtration is solved. Significantly improves beer freshness and saccharification efficiency while reducing wort loss.
Patent Information
- Application Number
- CN202411590320.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-02-14
AI Technical Summary
During the wort filtration process, the wort content is too high, resulting in severe oxidation of wort and bad flavor, affecting the freshness and quality of beer. At the same time, oxygen absorption caused by equipment shutdown protection during the filtration process and automatic pressure relief risk, resulting in wort loss.
By increasing the height of the balance tank, extend the exhaust pipe of the filter press to below the high liquid level signal of the balance tank, add the top water pipe of the sugar-to-top filter press, add the drain valve of the filter press before the balance tank, and adjust the inlet and outlet method of the filter press , to avoid overflow, disconnection and oxygen absorption.
It effectively reduces the oxygen content of wort, improves the freshness of beer, reduces wort loss, and improves the saccharification efficiency. The oxygen content of wort is reduced by more than 66%, the single pot saccharification yield has increased by 1.76-2.94%, and the saccharification efficiency has increased by 6.83-10.6%.
Smart Images
Figure CN119432515A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of beer production, and in particular relates to a saccharification operation system of a beer factory, and specifically relates to a filter press filtering system for improving the freshness of wort. Background Art
[0002] As the main alcoholic beverage consumed in the Chinese market, beer is favored by consumers for its clean taste and good palatability. Beer is a kind of carbonated, sparkling, low-alcohol fermented wine made from malt, water, hops and other main raw materials through yeast fermentation and processing. The production process of beer includes malt crushing, saccharification, filtration, boiling, spin sedimentation, cooling, fermentation, filtration, packaging and so on. Filtration after saccharification plays a very important role in the beer production process and is an important link to ensure the quality, flavor and safety of beer. It can be said that the freshness of the wort in the saccharification and filtration stages determines the level of freshness of the entire beer fermentation and finished product.
[0003] Both the filter press system and the filter tank system can be used for filtering wort. The filter press has some obvious advantages over the filter tank in beer production, such as higher production efficiency: the filter press can achieve a production efficiency of more than 12 batches per day, which is higher than the efficiency of the traditional filter tank; high degree of automation: the filtration of the filter press, the system CIP (Clean-In-Place) and the cleaning of the filter cloth can all be fully automatically controlled, reducing manual operations; reducing substances that affect the flavor of beer: the use of a filter press can reduce the entry of substances that may affect the flavor of beer, such as wheat bran polyphenols, pigments, bitter substances, and high molecular weight proteins, fats, fatty acids and β-glucans in malt into the wort, ensuring the good taste and clarity of the wort. Although the filter press system itself has a high operating efficiency, the control of the oxygen content of the wort during the filtration process is poor, which will cause serious oxidation of the wort, produce many undesirable flavors, and affect the freshness and quality of the beer. Under normal operating conditions, the oxygen content of the filtered wort exceeds 1500PPb, while the oxygen content of the filtered wort in the factory using the filter tank is below 50PPb. This is mainly due to the fluctuation of the flow rate of the wort during the filtration process, which causes the balance tank at the outlet of the filter press to overflow or cut off, causing the filter press equipment to shut down for protection, thereby absorbing a large amount of oxygen. In addition, there is a risk of automatic pressure relief during the resumption of production after the filter press is shut down, which can easily cause the first wort to leak, resulting in wort loss and waste of raw materials. Summary of the invention
[0004] In view of the above-mentioned defects of the prior art, the purpose of the present invention is to solve the problem that too high dissolved oxygen in wort of the saccharification filter press system affects the freshness and quality of beer, and to reduce the loss of the filter press process.
[0005] The present invention is mainly improved in the following aspects:
[0006] Raise the balance tank and keep the inlet position unchanged to avoid overflow. Extend the exhaust pipe to below the high liquid level signal of the balance tank to avoid interruption of wort filtration.
[0007] Add a top water pipeline for the saccharification pot, lead a branch from the slop washing water pipeline to the saccharification pot, do pipeline top water and filter slop washing, reduce the filter press interruption time during the filtration process, and balance the tank overflow problem.
[0008] Add a drain valve to the filter press in front of the balancing tank, adjust the emptying position of the filter press, adjust the running path of the first wort of the filter press, adjust the previous bottom-in and top-out mode to a two-in and four-out mode, fix the opening of the mash pump in front of the filter press, use the regulating valve in front of the balancing tank to control the liquid level of the balancing tank, and use the PID of the balancing tank outlet regulating valve to control the flow of the filter press.
[0009] The specific technical solution adopted by the present invention is as follows:
[0010] A filter press filtering system for improving the freshness of wort, comprising a saccharification pot, a slop water tank, a filter press, and a balancing tank, wherein the saccharification pot and the filter press, the filter press and the balancing tank, and the slop water tank and the filter press are connected by pipelines, and the volume of the balancing tank is 5 to 15 m 3 , height is 2 to 10m.
[0011] Furthermore, the volume of the balance tank is 5 to 10 m 3 , height is 2 to 5m.
[0012] The equipment was modified to increase the height of the balance tank from 3m to 4m, and the volume of the balance tank from 4m 3 Adjusted to 6m 3 The height of the inlet pipe of the balancing tank is kept unchanged to ensure that the balancing tank does not overflow during operation and the inlet pipe of the balancing tank is fully submerged to prevent the wort from absorbing oxygen during the process of entering the filter press.
[0013] In some specific embodiments, a high liquid level indicator is provided on the balancing tank, a filter press exhaust pipe is provided in the balancing tank, and the filter press exhaust pipe is extended below the high liquid level indicator. The exhaust pipe is intermittently opened to exhaust the air of the filter press.
[0014] Furthermore, the high liquid level indicating device is arranged at a distance of 2.5 to 3.5 m from the upper end of the balance tank.
[0015] In some specific embodiments, the high liquid level indicating device is a high liquid level indicator light.
[0016] In some specific embodiments, the filter press exhaust pipe is extended to 0.5 to 1.5 m below the high liquid level signal lamp.
[0017] For equipment modification, the overall height of the balance tank was increased and the exhaust pipe of the filter press was extended to below the high liquid level signal of the balance tank. This avoided the wort splashing in the balance tank during intermittent exhaust, causing false high liquid level alarms and stopping the mash pump.
[0018] In some specific embodiments, a saccharification pot top water pipeline is provided on the water outlet pipeline of the slop water tank, and the saccharification pot top water pipeline is connected to the saccharification pot.
[0019] Top water means that hot water is used to push the mash in the pipe into the filter press to prevent residue in the pipe, reduce liquid level fluctuations, and prevent flow interruption.
[0020] The equipment was modified by installing a top water pipeline for the saccharification pot, and a branch was led from the outlet pipeline of the slop washing water tank to the saccharification pot to provide top water and slop washing, thereby reducing the flow interruption time of the filter press during the filtration process and balancing the tank overflow problem.
[0021] In some specific embodiments, a balancing tank feed pipe is provided on the balancing tank, and a filter press drain valve is provided on the balancing tank feed pipe.
[0022] For equipment modification and program optimization, add a drain valve for the filter press in front of the balancing tank, modify the program, and adjust the emptying position of the filter press to avoid emptying the pipeline behind the balancing tank during the emptying process of the filter press, which will cause high dissolved oxygen content in the next batch of wort.
[0023] In some specific embodiments, the filter press is provided with more than two inlet and outlet ports.
[0024] Furthermore, the filter press is provided with two feed ports and four discharge ports.
[0025] Modify the program of the filter press, adjust the running path of the first wort of the filter press, and adjust the previous bottom-in and top-out mode to a two-in and four-out mode.
[0026] Modify the filter press program, fix the opening of the mash pump in front of the filter press, use the regulating valve in front of the balancing tank to control the liquid level in the balancing tank; use the PID of the balancing tank outlet regulating valve to control the flow of the filter press.
[0027] Compared with the prior art, the present invention has the following beneficial effects:
[0028] 1. Improved beer freshness. The oxygen content in wort is reduced by more than 66%, effectively reducing the risk of flavor changes or other quality problems caused by oxidation.
[0029] 2. Improvement of extract loss. After the transformation and optimization, the balance tank did not overflow or break, which saved about 15-25HL of high-concentration wort loss and increased the single-pot saccharification yield by 1.76-2.94%.
[0030] 3. Improved saccharification efficiency. Overflow or interruption of the balance tank will cause the filter press system to wait for 5 to 15 minutes. By modifying the balance tank and optimizing the program, the filtration time is shortened by 5 to 10 minutes, and the overall saccharification efficiency is increased by 6.83-10.6%.
[0031] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0032] Figure 1 It is a schematic diagram of the structure and flow of the filter press filtration system before improvement.
[0033] Figure 2 It is a schematic diagram of the structure and flow of the improved filter press filtration system.
[0034] Figure 3 It is a line graph of dissolved oxygen results of the improved filter press filtration system.
[0035] Figure 4 This is a diagram showing the reduction in wort losses in the improved filter press filtration system.
[0036] Description of the markings in the figure:
[0037] 1. Filter press; 11. Feed inlet at the upper end of the filter press; 12. Feed inlet at the lower end of the filter press; 13. Discharge outlet at the upper end of the filter press; 14. Discharge outlet at the lower end of the filter press; 15. Drain valve of the filter press;
[0038] 2. Balance tank; 21. High liquid level signal light; 22. Filter press exhaust pipe; 23. Regulating valve in front of balance tank;
[0039] 3. Saccharification pot;
[0040] 4. Wash the slop water tank. DETAILED DESCRIPTION
[0041] In order to make the technical means, creative features, objectives and effects of the invention easier to understand, the invention is further described below with reference to specific diagrams. However, the invention is not limited to the following implementation cases.
[0042] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, still falls within the scope of the technical contents disclosed by the present invention.
[0043] Example 1
[0044] like Figure 1 As shown, in the beer brewing process, the saccharification pot 3 is a device used to mix malt and water and heat the saccharification reaction. The purpose is to convert the starch in the malt into fermentable sugar through the action of enzymes. This process is called saccharification. After saccharification, the mixed liquid obtained is called mash, and the solid component is called spent grains. Wort and spent grains need to be separated by filtration. The purified wort enters the subsequent process, and the spent grains can be recycled. The saccharified solid-liquid mixture flows to the filter press 1 through a pipeline. The filter press 1 is set with a feed port and a discharge port. The solid-liquid mixture is pumped into the filter press through the feed port, and the wort is separated through the filter cloth, while the spent grains are intercepted by the filter cloth. The filtered wort first enters the balance tank 2, and the regulating valve 23 before the balance tank is used to adjust the material flow entering the balance tank 2 to maintain the liquid level of the balance tank 2 and ensure the stability of the process flow. The height of the balance tank 2 is 3m, and the filter press 1 is provided with a feed port and a discharge port. The filter press 1 filters the wort by applying pressure to push the wort through the filter cloth. The flow rate of the wort will inevitably fluctuate during the filtration process, causing the balance tank 2 to overflow or break, causing the filter press 1 to shut down for protection, thereby absorbing a large amount of oxygen, affecting the freshness of the wort. Compared with the operating capacity of the filter press 1, the buffering capacity of the balance tank 2 is small, resulting in oxygen absorption.
[0045] Example 2
[0046] The following improvements are made in this embodiment: a. increasing the height of the balancing tank; b. extending the exhaust pipe of the filter press; c. adding a water pipeline on the top of the saccharification pot; d. adding a sewage valve for the filter press; e. changing the feeding and discharging method of the filter press.
[0047] like Figure 2As shown, on the basis of Example 1, the height of the overall heightening of the balancing tank 2 is adjusted from the original 3m to 4m, and the height of the inlet pipe of the balancing tank 2 is kept unchanged to ensure that the balancing tank 2 does not overflow during operation and can cover the inlet pipe of the balancing tank 2 throughout the entire process, thereby avoiding the wort from absorbing oxygen during the process of entering the filter press 1; a high liquid level signal lamp 21 is provided on the upper part of the balancing tank 2, and the exhaust pipe 22 of the filter press is extended to below the high liquid level signal lamp 21 of the balancing tank 2, thereby avoiding the wort in the balancing tank 2 from splashing during the intermittent exhaust process, causing the high liquid level signal lamp 21 to falsely alarm and stop the mash pump; a saccharification pot top water pipeline is provided on the outlet pipe of the slop water tank 4, and the saccharification pot top water pipeline is connected to the saccharification pot 3. A branch line is led from the outlet pipe of the slop washing water tank 4 to the saccharification pot 3 for top water and slop washing, which reduces the interruption time of the filter press 1 during the filtration process and solves the overflow problem of the balance tank 2. The residual mash in the inlet pipe of the filter press is transported to the inside of the filter press 1 through the filtration path of the filter press 1 to obtain clear wort, which prevents the mash from remaining in the pipe. A filter press drain valve 15 is added in front of the balance tank 2 to adjust the emptying position of the filter press 1 to avoid the filter press 1 from overflowing during the emptying process. , the pipeline after the balance tank 2 is emptied, resulting in a high dissolved oxygen content in the next batch of wort. The closer the emptying position is to the main body of the filter press 1, the more the pipeline can be emptied, ensuring that the inside of the pipeline is filled with water to prevent oxygen from entering the inside of the pipeline; adjust the running path of the first wort of the filter press 1, and adjust the previous bottom-in and top-out to a two-in and four-out mode, that is, two feed ports and four discharge ports, specifically the upper feed port 11 of the filter press, the lower feed port 12 of the filter press, the upper discharge port 13 of the filter press, and the lower discharge port 14 of the filter press. The solid-liquid mixture is pumped into the filter press 1 through the feed port, and the wort is separated through the filter cloth, while the spent grains are intercepted by the filter cloth. The filtered wort first enters the balance tank 2, and the regulating valve 23 before the balance tank is used to adjust the material flow entering the balance tank 2 and the liquid level of the balance tank 2 to maintain the stability of the process.
[0048] The mash passes through the mash pump and the material pipeline to reach the upper and lower inlets of the filter press 1 at the same time. The mash is evenly distributed between the two filter plates through the filter plate inlet. The wort is filtered through the filter cloth, enters the filter plate, flows out from the four outlets, and is collected together in front of the balance tank 2. The liquid level of the outlet balance tank 2 is controlled by the regulating valve to ensure that the liquid level will not be lower than 70%, so as to prevent air from entering the filter press 1 or the liquid level of the balance tank 2 is too high, causing wort overflow loss. The height of the balance tank 2 is adjusted from 3m to 4m, and the height of the inlet pipe of the balance tank 2 is kept unchanged to ensure that the balance tank 2 does not overflow during operation and can cover the inlet pipe of the balance tank 2 throughout the process, so as to avoid the wort from absorbing oxygen when entering the filter press 1. While raising the height of the balance tank 2 as a whole, the exhaust pipe 22 of the filter press is extended to below the high liquid level signal light 21 of the balance tank 2, so as to avoid the wort splashing in the balance tank 2 during the intermittent exhaust process, causing the high liquid level false alarm and stopping the mash pump; add a filter press drain valve 15 in front of the balance tank 2, and modify the program Modify the program, adjust the emptying position of filter press 1 to avoid emptying the pipeline after balancing tank 2 during the emptying process of filter press 1, resulting in high dissolved oxygen content in the next batch of wort; modify the program, restore the outlet and regulating valve position of filter press 1 to the upper end as the regulating valve and the lower end as the ordinary valve. During operation, only the regulating valve is opened to perform PID control of the liquid level of balancing tank 2, and the control path of filter press 1 entering balancing tank 2 is modified to enter from the top and exit from the bottom; fix the opening of the mash pump in front of filter press 1, and use the regulating valve in front of balancing tank 2 to control the liquid level of balancing tank 2; use the PID of the regulating valve at the outlet of balancing tank 2 to control the flow of filter press.
[0049] Example 3
[0050] Before the project improvement, the flow control and balance tank control of the filter press filtration system fluctuated greatly, and the average dissolved oxygen value was around 800PPb. The technical solution of Example 2 was adopted, and after equipment modification and program optimization, the dissolved oxygen was tracked twice. At present, the average dissolved oxygen value has been reduced to the industry-leading level, and the modification effect is obvious. The relevant experimental results are shown below Figure 3 .
[0051] Example 4
[0052] The technical solution of Example 2 was adopted. After equipment modification and program optimization, the total amount of wort in a single pot was 850HL. After several process operations, the process results and Figure 4 (In the figure, the green line balance tank liquid level is not high, and the blue line filter press flow rate is not interrupted).
[0053] Table 1 The reduction of wort loss in the filter press filtration system after improvement
[0054]
[0055] Example 5
[0056] The technical solution of Example 2 was adopted. After equipment modification and program optimization, the volume of the mash in the saccharification pot was 680-720HL. After several process operations, the process results shown in Table 3 were obtained.
[0057] Table 3 Improvement of process time and efficiency before and after improvement
[0058]
[0059] It can be seen from Examples 2 to 5 that the various improvements of the present invention combined together reduce the oxygen content level of wort by more than 66%, increase the single-pot saccharification yield by 1.76-2.94%, and increase the saccharification efficiency by 6.83-10.6%, and the overall improvement effect is significant.
[0060] The preferred specific embodiments of the present invention are described in detail above. It should be understood that ordinary technicians in the field can make many modifications and changes based on the concept of the present invention without creative work. Therefore, all technical solutions that can be obtained by technicians in the technical field based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of the prior art should be within the scope of protection determined by the claims.
Claims
1. A filter press filtering system for improving the freshness of wort, characterized in that: The invention comprises a saccharification pot, a slurry washing water tank, a filter press, and a balance tank. The saccharification pot and the filter press, the filter press and the balance tank, and the slurry washing water tank and the filter press are connected by pipelines. The saccharification pot and the filter press are connected by pipelines. The saccharification pot and the filter press are connected by pipelines. The saccharification pot and the filter press are connected by pipelines. The saccharification pot and the filter press are connected by pipelines. The saccharification pot and the balance tank ... balance tank are connected by pipelines. The saccharification pot and the filter press are connected by pipelines. 3 , height is 2 to 10m.
2. The filter press filtration system according to claim 1, characterized in that: The volume of the balance tank is 5 to 10 m 3 , height is 2 to 5m.
3. The filter press filtration system according to claim 1, characterized in that: A high liquid level indicating device is arranged on the balancing tank, and a filter press exhaust pipe is arranged in the balancing tank, and the filter press exhaust pipe is extended to below the high liquid level indicating device.
4. The filter press filtering system according to claim 3, characterized in that: The high liquid level indicating device is arranged at a distance of 2.5 to 3.5 m from the upper end of the balance tank.
5. The filter press filtering system according to any one of claims 3 or 4, characterized in that: The high liquid level indicating device is a high liquid level indicator light.
6. The filter press filtering system according to any one of claims 3 or 4, characterized in that: The filter press exhaust pipe is extended to 0.5 to 1.5 m below the high liquid level indicator.
7. The filter press filtration system according to claim 1, characterized in that: A saccharification pot top water pipeline is arranged on the water outlet pipeline of the slop water tank, and the saccharification pot top water pipeline is connected to the saccharification pot.
8. The filter press filtration system according to claim 1, characterized in that: The balancing tank is provided with a balancing tank feed pipe, and the balancing tank feed pipe is provided with a filter press drain valve.
9. The filter press filtration system according to claim 1, characterized in that: The filter press is provided with more than two inlet and outlet ports.
10. The filter press filtration system according to claim 1, characterized in that: The filter press is provided with two feed inlets and four discharge inlets.