CN112126548A - Technology for recycling sealed pit mud of Maotai-flavor liquor fermentation pit - Google Patents
Technology for recycling sealed pit mud of Maotai-flavor liquor fermentation pit Download PDFInfo
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Abstract
The invention belongs to the technical field of wine making, and particularly discloses a process for recycling sealed pit mud of a fermentation pit of Maotai-flavor liquor, which comprises soaking, dissolving and pulping; separating impurities; solid-liquid separation and mould inactivation; and processing by a finished product machine and the like. The waste pit sealing mud is treated in a pure physical mode for recycling; performing pasteurization to inactivate mould and other miscellaneous bacteria in the waste cellar sealing mud and remove peculiar smell; large-scale and centralized production; the waste pit sealing mud is physically separated by mechanical equipment such as soaking, pulping, roller screening, inclined tube precipitation, sterilization and the like, the equipment is connected, and the streamlined production is carried out; the equipment layout is ingenious and well-distributed, the elevation difference is fully utilized, the pit mud to be treated forms self-flow, the equipment investment and the material conveying are reduced, the cost is saved, and the production consumption is reduced; the pug mill is used for mixing the new mud with the treated pit mud, so that no waste water or waste residue is generated, and the pug mill is environment-friendly and energy-saving; and supernatant after the inclined tube precipitation is recycled to the primary soaking pool, the clear liquid is recycled, and no wastewater is discharged.
Description
Technical Field
The invention relates to the technical field of wine making, in particular to a process for recycling sealed pit mud of a fermentation pit of Maotai-flavor liquor.
Background
The pit mud for sealing the fermented Maotai-flavor liquor is red-brown subacid clayey mauve mud, and comprises the following main components: silicon dioxide, silicate, organic matter, microorganisms, trace elements such as iron, copper, etc., and a large amount of moisture. The pit sealing mud is widely applied to sealing the fermentation pit of the solid Maotai-flavor liquor due to the sealing property, permeability and good moisturizing and heat insulating effects. The mauve mud is the only pit sealing mud which meets the pit sealing use standard in the production process of mauve white spirit wine, has very limited resources and belongs to non-renewable resources. After the cellar sealing mud is subjected to multi-round fermentation and repeated use, the sealed cellar mud is mixed with a plurality of rice husks and fermented grains, contains a large number of microbial floras, is cracked or hardened if being continuously used, and cannot play a role in sealing, moisture preservation and ventilation. Meanwhile, the influence of mould or other mixed bacteria can cause the phenomena of mildew, putrefaction and odor generation, thereby causing environmental pollution. With the increase of the yield of the Maotai-flavor liquor and the extension of a brewing workshop, the cellar sealing mud resource is less and less, and the whole cellar sealing mud is in an exhausted development state. Because sealed cellar for storing things mud is in the use, every round of fermentation all has 50% abandonment, and after the fermentation round of every year, sealed cellar for storing things mud is abandoned completely, not only the resource of wasting but also the polluted environment.
Therefore, the recycling of the pit mud not only accords with the national industrial policy, but also solves the problem of shortage of pit mud soil resources for enterprises, reduces the production cost of pit mud soil exploitation, transportation and the like, protects the surrounding environment, is beneficial to green and environment-friendly production and sustainable development of the enterprises, is very necessary and is feasible.
At present, in a maotai-flavor liquor production place, because sealed pit mud-mauve mud is high in price and completely mined, some small and medium-sized wineries do not need any treatment and regeneration after fermentation is finished in one annual round, waste pit mud is prolonged and used, and after the waste pit mud is sealed, because a large amount of rice hulls and impurities are mixed, the waste pit mud does not have permeability, so that the fermentation temperature is too high, the cracking of the pit mud and the 'package burning' phenomenon of fermented grains in a fermentation tank are generated, the effects of heat preservation, moisture preservation and permeability are not achieved, and liquor pollution and quality accidents are more easily caused. In another mode, some small wine plants use plastic films to cover fermentation pits to replace pit sealing mud for moisture preservation and heat preservation production, but the problem that plasticizers in white wine exceed standards exists, and meanwhile, the respiration of microorganisms is inhibited, so that serious production accidents such as reduction of wine yield and unqualified products are caused.
Disclosure of Invention
The invention aims to provide a process for recycling sealed pit mud of a Maotai-flavor liquor fermentation pit, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a sealed pit mud recycling process for a Maotai-flavor liquor fermentation pit comprises the following specific steps:
s1: soaking and dissolving to prepare pulp:
soaking: collecting and transporting waste solid sealed pit mud to a regeneration workshop, firstly primarily sorting and crushing pit mud blocks to be treated, transporting the pit mud blocks to a soaking pool, and soaking until the pit mud blocks are completely soaked and expanded by water absorption to form softened wet mud;
dissolving and pulping: conveying the soaked softened wet mud to a pulping tank through a lifter, adding water, fully stirring to prepare slurry with the solid content of 30%, wherein the slurry contains diluted and dissolved sealed pit mud, and also contains substances such as rice husks, fermented grains, stones and the like;
s2: impurity separation: after pulping is finished, the slurry flows into an impurity separation process by using a liquid level difference, and substances such as rice hulls, fermented grains, stones and the like contained in the slurry are filtered out by using a drum screen and an iron remover; the method specifically comprises the following steps: the screening cylinder is rotated at a certain rotating speed through a speed changing system, and pit mud slurry passes through the screening cylinder from top to bottom to be separated; discharging the separated solution from the lower part of the front end of the screening cylinder to step S3, and discharging impurities such as rice hulls, stones, scrap iron and the like from the tail part of the lower end of the screening cylinder;
s3: solid-liquid separation and mould inactivation:
solid-liquid separation: the pit mud slurry with impurities removed enters a bevel edge precipitation tank for preliminary precipitation, the supernatant enters a filtrate collection tank and is conveyed to a soaking pool through a conveying pump for soaking original solid pit mud, and part of the supernatant is conveyed to a drum sieve through a mud pump for washing the sieve mesh;
and (3) mould inactivation:
for the cellar sealing mud containing mould and putrefactive, the sterilization treatment is carried out before the solid-liquid separation, the pasteurization technology is adopted for sterilization, the heat source is high-temperature steam, the high-temperature steam is directly introduced into an inclined tube precipitation tank, the temperature is increased to 65-68 ℃, the temperature is kept for 10min, and the growth-type pathogenic bacteria, mould, yeast and the like are inactivated;
directly entering step S4 for the cellar sealing mud without mildewing;
s4: processing by a finished product machine: the finished product machine is a pugging machine, separated and sterilized mud-shaped precipitates enter the pugging machine, the pugging machine adopts double-shaft feeding and stirring, raw materials are fully rotated and extruded in a mud cylinder, mud with medium water content obtained by solid-liquid separation and untreated original pit mud are mixed and stirred, and the mud is qualified after visual inspection and physical and chemical inspection to obtain a finished product for later use.
Preferably, in step S1, the soaking water used in the soaking is raw water of the production process, and the soaking water consumption is 20-25%.
Preferably, in step S2, the drum screen is a single-stage screening device, the main structure of the drum screen is a screening cylinder, the mesh size of the screening cylinder is 10 meshes, the outside of the screening cylinder is sealed by a sealing cover, and the iron remover is a wet iron remover device.
Preferably, in step S2, during the screening process, the system is cleaned by a flushing device to avoid scaling and pollution.
Preferably, in step S3, the inclined plate settling tank is made of food-grade stainless steel plates by welding, the solution enters the inclined plate settling tank, the pit mud flows and slides down from top to bottom to settle at the bottom of the settling tank, and the supernatant in the settling process is discharged through a liquid collecting tank at the upper part of the settling tank.
Preferably, in step S4, the wet mud processed by the finishing machine has a water content of about 15% to less than 20%.
Compared with the prior art, the invention has the beneficial effects that: .
In the pit mud recycling process provided by the invention, no chemical substance is added, and the waste pit sealing mud is treated in a pure physical mode for recycling; performing pasteurization to inactivate mould and other miscellaneous bacteria in the waste cellar sealing mud and remove peculiar smell; centralized collection and centralized treatment are realized, and large-scale centralized production is facilitated; the waste pit sealing mud is physically separated by mechanical equipment such as soaking, pulping, roller screening, inclined tube precipitation, sterilization and the like, the equipment is connected, and the streamlined production is carried out; the equipment layout is ingenious and well-distributed, the elevation difference is fully utilized, the pit mud to be treated forms self-flow, the equipment investment and the material conveying are reduced, the cost is saved, and the production consumption is reduced; the pug mill is used for mixing the new mud with the treated pit mud, so that no waste water or waste residue is generated, and the pug mill is environment-friendly and energy-saving; and supernatant after the inclined tube precipitation is recycled to the primary soaking pool, the clear liquid is recycled, and no wastewater is discharged.
Drawings
FIG. 1 is an overall process flow diagram of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the waste pit mud contains a large amount of rice hulls, microbial flora and other impurities, and no other additives such as any organic or inorganic substances are allowed to be added in the regeneration process, so that the treatment process must meet the process requirements and production sanitation requirements of production raw materials, auxiliary materials, packaging materials and the like, and all other added substances are avoided. Therefore, the regeneration process of the sealed pit mud is a relatively original and traditional regeneration process, only raw water for production and necessary mechanical equipment are required for regeneration, and food-grade 304 stainless steel is required for the mechanical equipment to contact the sealed pit mud.
The invention provides a process for recycling sealed pit mud of a Maotai-flavor liquor fermentation pit, which comprises the following specific steps of:
s1: soaking and dissolving to prepare pulp
The method comprises the steps of collecting and transporting waste solid sealed pit mud to a regeneration workshop, firstly carrying out primary sorting and crushing on pit mud blocks to be processed, conveying the pit mud blocks to a soaking pool, and soaking the pit mud blocks until the pit mud blocks are completely absorbed with water, soaked and expanded to form softened wet mud. The soaking water is raw water of the production process, and the water consumption for soaking is about 20 percent.
The soaked softened wet mud is conveyed to a pulping tank by a lifter, and is fully stirred by adding water to prepare slurry with the solid content of about 30 percent, at the moment, the slurry contains diluted and dissolved sealed pit mud, and also contains substances such as rice husks, fermented grains, stones and the like, and the slurry flows into the next procedure, namely impurity separation, by utilizing the liquid level difference.
The soaking, dissolving and pulping process equipment comprises: a soaking pool, a lifter, a pulping tank, a stirrer and the like.
S2: separation of impurities
The impurity separation is mainly to get rid of foreign matter such as rice husk, stone, iron fillings in the thick liquid, utilizes drum sieve and de-ironing separator can high-efficient screening rice husk, iron fillings and other foreign matters such as stone. The rotary screen related in the scheme adopts a single-stage screening device, and the iron remover related in the scheme is a wet iron remover device.
The main structure of the drum screen is a screening drum, the aperture of a screen mesh is 10 meshes, and the outside of the screen mesh is sealed by a sealing cover. The screening cylinder rotates at a certain rotating speed through the speed change system, and the pit mud slurry is separated from top to bottom through the screening cylinder. The solution obtained by separation is discharged from the lower part of the front end of the screening cylinder and enters the next procedure, namely the solid-liquid separation of pit mud. Rice husk, stone, scrap iron and other impurities are discharged from the tail part of the lower end of the screening cylinder.
In the screening process, the system is cleaned by using a flushing device, so that scaling and pollution are avoided.
The main equipment of the impurity separation section comprises a conveying pipeline, a drum screen, an iron remover, a flushing system, a sundries collecting device and the like.
S3: solid-liquid separation and mold inactivation
This scheme utilization hypotenuse precipitation tank carries out preliminary sedimentation. The solid-liquid separation device concentrates the high-water-content slurry into the medium-water-content slurry, and the main equipment is an inclined tube settling tank according to the design of the precipitation area and the concentration.
The pit mud slurry with impurities removed enters a bevel edge precipitation tank for preliminary precipitation, the supernatant enters a filtrate collection tank, is conveyed to a soaking pool through a conveying pump for soaking original solid pit mud (waste water recycling), and part of the supernatant is conveyed into a drum screen through a mud pump for washing the screen.
If the treatment contains mould and putrefactive pit sealing mud, sterilization treatment is required before dehydration, pasteurization technology is adopted for sterilization, a heat source is high-temperature steam, the high-temperature steam can be directly introduced into an inclined tube precipitation tank, the temperature is increased to 65-68 ℃, heat preservation is carried out for 10min, growth type pathogenic bacteria, mould, saccharomycetes and the like are inactivated, the sterilization efficiency can reach 97.3% -99.9%, only part of thermophilic bacteria, heat-resistant bacteria, spores and the like are remained after disinfection, most of the bacteria are lactic acid bacteria, the lactic acid bacteria cannot mildew, and storage and use of the pit sealing mud cannot be influenced too much. The cellar sealing mud without mildewing can directly enter the next procedure, namely a pugging machine, and separated and sterilized mud-shaped precipitates enter the next procedure, namely the pugging machine. The settling tank is made of food-grade stainless steel plates by welding, the solution enters the inclined plate settling tank, and the particulate matters (pit mud) flow and slide down from top to bottom and settle at the bottom of the settling tank. And discharging supernatant in the sedimentation process through a liquid collecting tank at the upper part of the sedimentation tank.
S4: machine processing of finished products
The finished product machine is a mixing and stirring device for separating solid and liquid to obtain mud with medium water content and untreated original pit mud. The finished product machine is a pug mill, double shafts are used for feeding and stirring, and raw materials are fully rotated and extruded in a mud cylinder. The hardness and viscosity of the produced kiln mud can meet the conditions required by kiln sealing, and the labor power of manually stepping on the mud is reduced. Meanwhile, the uneven phenomenon caused by large earth granularity in manual and mud mixing is reduced. The moisture content of the wet mud treated by the finished product machine is about 15-20%, and the wet mud is convenient to transport and store. And (5) performing visual inspection and physical and chemical inspection to obtain a qualified finished product for later use.
The process flow of the invention is relatively physical treatment and pasteurization, the flow is simple, the operation is convenient, the use field and space are considered, structures and factory facilities are required, in the production, the operation is carried out in different shifts and the continuous operation is carried out, and the pit sealing mud to be treated and the finished pit sealing mud are required to be reserved, so that a certain factory field is required when designing research projects, and the square of the Chinese scientific research field is about 100. In the industrial production, each workshop is recommended to be matched with one cellar sealing mud treatment room, and each workshop is alternately operated and used.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The sealed pit mud recycling process for the Maotai-flavor liquor fermentation pit is characterized by comprising the following specific steps of:
s1: soaking and dissolving to prepare pulp:
soaking: collecting and transporting waste solid sealed pit mud to a regeneration workshop, firstly primarily sorting and crushing pit mud blocks to be treated, transporting the pit mud blocks to a soaking pool, and soaking until the pit mud blocks are completely soaked and expanded by water absorption to form softened wet mud;
dissolving and pulping: conveying the soaked softened wet mud to a pulping tank through a lifter, adding water, fully stirring to prepare slurry with the solid content of 30%, wherein the slurry contains diluted and dissolved sealed pit mud, and also contains substances such as rice husks, fermented grains, stones and the like;
s2: impurity separation: after pulping is finished, the slurry flows into an impurity separation process by using a liquid level difference, and substances such as rice hulls, fermented grains, stones and the like contained in the slurry are filtered out by using a drum screen and an iron remover; the method specifically comprises the following steps: the screening cylinder is rotated at a certain rotating speed through a speed changing system, and pit mud slurry passes through the screening cylinder from top to bottom to be separated; discharging the separated solution from the lower part of the front end of the screening cylinder to step S3, and discharging impurities such as rice hulls, stones, scrap iron and the like from the tail part of the lower end of the screening cylinder;
s3: solid-liquid separation and mold inactivation
Solid-liquid separation: the pit mud slurry with impurities removed enters a bevel edge precipitation tank for preliminary precipitation, the supernatant enters a filtrate collection tank and is conveyed to a soaking pool through a conveying pump for soaking original solid pit mud, and part of the supernatant is conveyed to a drum sieve through a mud pump for washing the sieve mesh;
and (3) mould inactivation:
for the cellar sealing mud containing mould and putrefactive, the sterilization treatment is carried out before the solid-liquid separation, the pasteurization technology is adopted for sterilization, the heat source is high-temperature steam, the high-temperature steam is directly introduced into an inclined tube precipitation tank, the temperature is increased to 65-68 ℃, the temperature is kept for 10min, and the growth-type pathogenic bacteria, mould, yeast and the like are inactivated;
directly entering step S4 for the cellar sealing mud without mildewing;
s4: processing by a finished product machine: the finished product machine is a pugging machine, separated and sterilized mud-shaped precipitates enter the pugging machine, the pugging machine adopts double-shaft feeding and stirring, raw materials are fully rotated and extruded in a mud cylinder, mud with medium water content obtained by solid-liquid separation and untreated original pit mud are mixed and stirred, and the mud is qualified after visual inspection and physical and chemical inspection to obtain a finished product for later use.
2. The Maotai-flavor liquor fermentation pit sealed pit mud recycling process according to claim 1, characterized in that: in step S1, the soaking water used in the soaking process is raw water of the production process, and the water consumption for soaking is 20-25%.
3. The Maotai-flavor liquor fermentation pit sealed pit mud recycling process according to claim 1, characterized in that: in step S2, the drum screen is a single-stage screening device, the main structure of the drum screen is a screening cylinder, the mesh size of the screening cylinder is 10 meshes, the outside of the screening cylinder is sealed by a sealing cover, and the iron remover is a wet-type iron remover device.
4. The Maotai-flavor liquor fermentation pit sealed pit mud recycling process according to claim 1, characterized in that: in the step S2, in the screening process, a flushing device is used for cleaning the system to avoid scaling and pollution.
5. The Maotai-flavor liquor fermentation pit sealed pit mud recycling process according to claim 1, characterized in that: in the step S3, the inclined plate settling tank is made of food-grade stainless steel plates through welding, the solution enters the inclined plate settling tank, the pit mud flows and slides downwards from top to bottom and settles at the bottom of the settling tank, and the supernatant in the settling process is discharged through a liquid collecting tank at the upper part of the settling tank.
6. The Maotai-flavor liquor fermentation pit sealed pit mud recycling process according to claim 1, characterized in that: in step S4, the wet mud processed by the product machine contains less than 15-20% of water.
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Cited By (1)
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| CN114752452A (en) * | 2022-03-09 | 2022-07-15 | 江苏今世缘酒业股份有限公司 | Fermented mud manufacturing method and production line |
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Application publication date: 20201225 |