Fermented grain stacking method

Abstract

The invention relates to a fermented grain stacking method in the technical field of wine brewing, which specifically comprises the following steps of: feeding sand, namely starting a steam exhaust machine when the stacking temperature of a coarse sand round is 28-30 DEG C and the humidity exceeds 60%; the heap temperature is 30-35 DEG C in one round, two fans are started, the heap temperature is increased to three in the next day, and an exhaust turbine is not started. The number of the fans is increased to four on the third day, and one exhaust turbine is started when the external temperature exceeds 30 DEG C. The stacking temperature is 28-32 DEG C in three rounds, four fans are arranged during stacking, five fans are increased in the next day, six fans are increased in the third day, one exhaust turbine is started when the external temperature exceeds 30 DEG C, and two fans are started when the external temperature exceeds 35 DEG C. The piling temperature of four rounds is 26-30 DEG C, 5-6 fans are arranged during piling, 6 fans are arranged in the next day, and 3 steam exhausters are started. And when the external temperature exceeds 30 DEG C, the steam exhaust machine is started as required. According to the method, the fermentation effect of the fermented grains in each turn can be remarkably improved.

Description

Technical Field

[0001] The invention belongs to the technical field of wine brewing, and particularly relates to a method for piling up mash. Background Art

[0002] In the liquor brewing process, the mash stacking process plays a vital role. The mash stacking process has specific requirements for the pile specifications, usually with a height of 1.5-2 meters and a pile diameter of 6-7 meters. However, in different brewing stages, such as lower sand, rough sand, and from round one to round seven, the mash presents significant differences in shape. These differences are not only reflected in the appearance, but also in the physical structure and microbial community distribution characteristics inside the mash. At the same time, the starting temperature, top stacking temperature, and dumping temperature of the mash at each stage are not the same. The starting temperature determines the initial growth activity of the microorganisms, the top stacking temperature affects the rate and stability of the fermentation process, and the dumping temperature is related to the final quality of the mash. This temperature difference is determined by the characteristics of the mash in different rounds and the brewing target requirements.

[0003] At present, in the actual operation of piling up the mash pile, the industry generally adopts the collaborative operation of plate chain fans and steam exhaust fans to dissipate heat and exhaust steam from the mash pile. Generally, four plate chain fans and two steam exhaust fans are used for heat dissipation and exhaust steam from the first to the seventh round, and the frequency of the plate chain fans and steam exhaust fans is generally 40-50HZ. Due to the different properties of the mash in each round, it is difficult to meet the heat dissipation and exhaust steam requirements of the mash piles at different stages, resulting in insufficient top temperature and maintenance days of the mash piles in some rounds, which leads to poor fermentation effect of the mash in some rounds. Summary of the invention

[0004] The invention aims to provide a method for piling up fermented grains, so as to improve the top temperature and the maintenance days of each round of fermented grains piles.

[0005] A method for piling up fermented grains in this scheme comprises the following steps:

[0006] (1) The stacking and roughing rounds: the starting temperature is 28-30℃, the top temperature is 26-28℃, and the dumping temperature is 24-26℃; the plate chain fan is not turned on during the stacking and roughing rounds. When the humidity of the mash exceeds 60%, one exhaust fan is turned on, the plate chain fan frequency is 40-50HZ, and the exhaust fan frequency is 25-30HZ;

[0007] (2) One round: the starting temperature is 30-35°C, the upper temperature is 28-32°C, and the dumping temperature is 26-28°C; two plate chain fans are turned on during the first round of starting, and the number of plate chain fans is increased to three on the second day after the starting operation is completed. The exhaust fan is not turned on in this round; the frequency of the plate chain fans is 40-50HZ;

[0008] (3) Second round: the starting temperature is 30-35°C, the upper temperature is 28-32°C, and the dumping temperature is 26-28°C; two plate chain fans are turned on during the second round of starting. The number of plate chain fans increases to 3 on the second day after the starting operation is completed, and increases to 4 on the third day. When the external ambient temperature exceeds 30°C, one exhaust fan is turned on; the frequency of the plate chain fan is 40-50HZ, and the frequency of the exhaust fan is 40-50HZ;

[0009] (4) Three rounds: the starting temperature is 28-32°C, the upper pile temperature is 26-28°C, and the dumping temperature is 24-26°C; 4 plate chain fans are turned on during the three rounds of starting, and the number of plate chain fans is increased to 5 on the second day after the starting operation is completed, and to 6 on the third day. When the external ambient temperature exceeds 30°C and is lower than 35°C, 1 exhaust fan is turned on, and when the external ambient temperature exceeds 35°C, 2 exhaust fans are turned on; the plate chain fan frequency is 40-50HZ, and the exhaust fan frequency is 40-50HZ;

[0010] (5) Four rounds: the starting temperature is 26-30℃, the upper pile temperature is 24-28℃, and the dumping temperature is 24-26℃; 5-6 plate chain fans are turned on during the four rounds of starting, and the number of plate chain fans on the second day after the starting operation is completed is 6. Three exhaust fans are turned on throughout this round; the plate chain fan frequency is 40-50HZ, and the exhaust fan frequency is 40-50HZ;

[0011] (6) Five rounds: the starting temperature is 26-30°C, the upper pile temperature is 24-28°C, and the dumping temperature is 24-26°C; two plate chain fans are turned on during the five rounds of starting the pile, and the number of plate chain fans is increased to 3 on the second day after the starting operation is completed, and to 4 on the third day. When the external ambient temperature exceeds 30°C and is lower than 35°C, one exhaust fan is turned on, and when the external ambient temperature exceeds 35°C, two exhaust fans are turned on; the plate chain fan frequency is 40-50HZ, and the exhaust fan frequency is 40-50HZ;

[0012] (7) Six rounds: the starting temperature is 26-30°C, the upper pile temperature is 24-28°C, and the dumping temperature is 24-26°C. Two plate chain fans need to be turned on during the six rounds of starting. The number of plate chain fans will be increased to three on the second day after the starting operation is completed. When the external ambient temperature exceeds 30°C, one exhaust fan will be turned on. The frequency of the plate chain fans is 40-50HZ, and the frequency of the exhaust fan is 40-50HZ.

[0013] The above-mentioned starting temperature refers to the average value of three temperatures randomly measured at a depth of 20 cm in the pile after starting the pile; the pile-up temperature refers to the average value of three temperatures randomly measured on the surface of the pile after the pile is piled up the next day; the dumping temperature refers to the temperature of the pile 20-30 cm away from the outer layer when the fermented grains pile is completed.

[0014] Furthermore, before piling up the mash, 2% to 3% by weight of rice husk is added to the mash and mixed evenly.

[0015] Furthermore, before the second round of mash is piled up, 2.5% to 3.5% by weight of rice husk is added to the mash and mixed evenly.

[0016] Furthermore, before the third and fourth rounds of mash are piled up, 4% to 5% by weight of rice husk is added to the mash and mixed evenly.

[0017] Furthermore, before piling up the five-round mash, 3% to 4% by weight of rice husk is added to the mash and mixed evenly.

[0018] Furthermore, before the sixth round of mash is piled up, 2% to 3% by weight of rice husk is added to the mash and mixed evenly.

[0019] Furthermore, the diameter of the mash pile is 6-7m and the height is 1.8-2m.

[0020] Furthermore, in rounds one to five, the thickness of the mash transported on the plate chain is 4 to 5 cm.

[0021] Furthermore, in six rounds, the thickness of the mash transported on the plate chain is 5 to 6 cm. DETAILED DESCRIPTION

[0022] The following is further described in detail through specific implementation methods:

[0023] Embodiment 1: A method for stacking fermented grains, comprising the following steps:

[0024] (1) Sand and coarse sand cycle: The plate chain fan is not turned on during the sand and coarse sand cycle. When the humidity of the mash exceeds 60%, one exhaust fan is turned on. The frequency of the plate chain fan is 40-50HZ, and the frequency of the exhaust fan is 25-30HZ.

[0025] (2) One round: Two plate chain fans are turned on during one round of stacking. The number of plate chain fans increases to three on the second day after the stacking operation is completed. The exhaust fan is not turned on during this round. The frequency of the plate chain fans is 40-50HZ.

[0026] (3) Second round: Two plate chain fans are turned on during the second round of stacking. The number of plate chain fans increases to three on the second day after the stacking operation is completed, and increases to four on the third day. When the external ambient temperature exceeds 30°C, one exhaust fan is turned on; the frequency of the plate chain fans is 40-50 Hz, and the frequency of the exhaust fan is 40-50 Hz;

[0027] (4) Three rounds: When starting the pile for three rounds, 4 plate chain fans are turned on. The number of plate chain fans increases to 5 on the second day after the pile starting operation is completed, and increases to 6 on the third day. When the external ambient temperature exceeds 30°C and is lower than 35°C, 1 exhaust fan is turned on. When the external ambient temperature exceeds 35°C, 2 exhaust fans are turned on. The frequency of the plate chain fans is 40-50HZ, and the frequency of the exhaust fans is 40-50HZ.

[0028] (5) Four rounds: 5-6 plate chain fans are turned on during the four rounds of stacking. On the second day after the stacking operation is completed, the number of plate chain fans is 6 and 3 exhaust fans are turned on. The frequency of the plate chain fans is 40-50 Hz and the frequency of the exhaust fans is 40-50 Hz.

[0029] (6) Five rounds: Two plate chain fans are turned on during the five rounds of stacking. The number of plate chain fans increases to three on the second day after the stacking operation is completed, and increases to four on the third day. When the external ambient temperature exceeds 30°C and is lower than 35°C, one exhaust fan is turned on. When the external ambient temperature exceeds 35°C, two exhaust fans are turned on. The frequency of the plate chain fans is 40-50 Hz, and the frequency of the exhaust fans is 40-50 Hz.

[0030] (7) Six rounds: Two plate chain fans need to be turned on during the six rounds of stacking. The number of plate chain fans will be increased to three on the second day after the stacking operation is completed. When the external ambient temperature exceeds 30°C, one exhaust fan will be turned on; the frequency of the plate chain fans is 40-50HZ, and the frequency of the exhaust fan is 40-50HZ.

[0031] In the above process, the data related to the starting temperature, the upper temperature and the dropping temperature of each round are shown in Table 1 below:

[0032] Table 1: Data of starting temperature, stacking temperature and throwing temperature in each round

[0033]

[0034] In the above process, a husk machine is used to add husks to the mash. The amount of husk added at each stage and the operating frequency of the husk machine are shown in Table 2 below:

[0035] Table 2: Husk addition parameters

[0036]

[0037]

[0038] The automatic rake turning machine added to the conveying plate chain of the mash is used to turn on the rake turning machine immediately if the mash clumps are large during the stacking process and adjust the height according to the nature of the mash to ensure the mash is broken up. The specific parameters are shown in Table 3:

[0039] Table 3: Feeding parameters

[0040]

[0041] In the above process, the shapes of the mash piles at each stage are shown in Table 4 below:

[0042] Table 4: Parameters of fermented grains pile

[0043]

[0044] Comparative Example: A method for stacking mash, which differs from Example 1 only in that no husk is added to the mash in each round, and in addition, the use of the plate chain fan and the exhaust fan is different, as shown in Table 5 below:

[0045] Table 5: Comparative plate chain fan and exhaust fan usage

[0046]

[0047] The temperature data of the fermented grains after each round of stacking and fermentation of Example 1 and the comparative example are compared as shown in Table 6 below:

[0048] Table 6: Comparative data of temperature data after stacking and fermentation of the fermented grains in each round of the comparative example and embodiment 1

[0049]

[0050]

[0051] Due to the special high-temperature stacking method of Maotai-flavor liquor, within the appropriate top temperature range, the higher the top temperature and the longer the maintenance time, the better the fermentation effect of the mash. As shown in Table 6: by adding husks and turning on appropriate exhaust fans and steam exhaust fans according to the characteristics of each round of mash, the moisture and temperature of the mash are ensured to be suitable for microbial growth. After using this set of parameters, the top temperature of each round of stacking fermentation is increased, and the number of days the top temperature is maintained is increased by about 1-2 days.

[0052] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A method for piling up fermented grains, characterized in that: The following steps are involved: (1) The stacking and roughing rounds: the starting temperature is 28-30℃, the top temperature is 26-28℃, and the dumping temperature is 24-26℃; the plate chain fan is not turned on during the stacking and roughing rounds. When the humidity of the mash exceeds 60%, one exhaust fan is turned on, the plate chain fan frequency is 40-50HZ, and the exhaust fan frequency is 25-30HZ; (2) One round: the starting temperature is 30-35°C, the upper temperature is 28-32°C, and the dumping temperature is 26-28°C; two plate chain fans are turned on during the first round of starting, and the number of plate chain fans is increased to three on the second day after the starting operation is completed. The exhaust fan is not turned on in this round; the frequency of the plate chain fans is 40-50HZ; (3) Second round: the starting temperature is 30-35°C, the upper temperature is 28-32°C, and the dumping temperature is 26-28°C; two plate chain fans are turned on during the second round of starting. The number of plate chain fans increases to 3 on the second day after the starting operation is completed, and increases to 4 on the third day. When the external ambient temperature exceeds 30°C, one exhaust fan is turned on; the frequency of the plate chain fan is 40-50HZ, and the frequency of the exhaust fan is 40-50HZ; (4) Three rounds: the starting temperature is 28-32°C, the upper pile temperature is 26-28°C, and the dumping temperature is 24-26°C; 4 plate chain fans are turned on during the three rounds of starting, and the number of plate chain fans is increased to 5 on the second day after the starting operation is completed, and to 6 on the third day. When the external ambient temperature exceeds 30°C and is lower than 35°C, 1 exhaust fan is turned on, and when the external ambient temperature exceeds 35°C, 2 exhaust fans are turned on; the plate chain fan frequency is 40-50HZ, and the exhaust fan frequency is 40-50HZ; (5) Four rounds: the starting temperature is 26-30℃, the upper pile temperature is 24-28℃, and the dumping temperature is 24-26℃; 5-6 plate chain fans are turned on during the four rounds of starting, and the number of plate chain fans on the second day after the starting operation is completed is 6. Three exhaust fans are turned on throughout this round; the plate chain fan frequency is 40-50HZ, and the exhaust fan frequency is 40-50HZ; (6) Five rounds: the starting temperature is 26-30°C, the upper pile temperature is 24-28°C, and the dumping temperature is 24-26°C; two plate chain fans are turned on during the five rounds of starting the pile, and the number of plate chain fans is increased to 3 on the second day after the starting operation is completed, and to 4 on the third day. When the external ambient temperature exceeds 30°C and is lower than 35°C, one exhaust fan is turned on, and when the external ambient temperature exceeds 35°C, two exhaust fans are turned on; the plate chain fan frequency is 40-50HZ, and the exhaust fan frequency is 40-50HZ; (7) Six rounds: the starting temperature is 26-30°C, the upper pile temperature is 24-28°C, and the dumping temperature is 24-26°C. Two plate chain fans need to be turned on during the six rounds of starting. The number of plate chain fans will be increased to three on the second day after the starting operation is completed. When the external ambient temperature exceeds 30°C, one exhaust fan will be turned on. The frequency of the plate chain fans is 40-50HZ, and the frequency of the exhaust fan is 40-50HZ.

2. The method for stacking fermented grains according to claim 1, characterized in that: Before piling up the mash, add 2% to 3% of its weight of rice husk into the mash and mix well.

3. A method for stacking fermented grains according to claim 2, characterized in that: Before the second round of mash is piled up, 2.5% to 3.5% of its weight of rice husk is added to the mash and mixed evenly.

4. The method for stacking fermented grains according to claim 3, characterized in that: Before piling up the third and fourth rounds of mash, add 4% to 5% of its weight of rice husks into the mash and mix well.

5. The method for stacking fermented grains according to claim 4, characterized in that: Before piling up the fifth round of mash, add 3% to 4% of its weight of rice husk to the mash and mix well.

6. The method for stacking fermented grains according to claim 5, characterized in that: Before piling up the mash from the sixth round, add 2% to 3% of its weight of rice husks into the mash and mix well.

7. The method for stacking fermented grains according to claim 6, characterized in that: The diameter of the mash pile is 6-7m and the height is 1.8-2m.

8. A method for stacking fermented grains according to any one of claims 1 to 7, characterized in that: In rounds one to five, the thickness of the mash transported on the plate chain is 4 to 5 cm.

9. A method for stacking fermented grains according to claim 8, characterized in that: In six rounds, the thickness of the mash transported on the plate chain is 5 to 6 cm.

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