CN218096741U - Vinasse batch fermentation continuous drying system - Google Patents

Abstract

The utility model discloses a vinasse batch fermentation continuous drying system, wherein an air inlet of each vinasse fermentation machine is sequentially provided with a secondary preheater and a tertiary preheater along the air flowing direction, a hot side inlet of the secondary preheater is connected with a high-temperature hot water pipe, and a hot side outlet of the secondary preheater is connected with a low-temperature hot water pipe; a hot side inlet of the third-stage preheater is connected with a high-temperature condensate pipe, and a cold side outlet of the third-stage preheater is connected with a condensate water return pipe; the air outlet of each vinasse fermentation machine is respectively connected with the hot side inlet of the primary preheater through a fermentation tail gas discharge pipe, the hot side outlet of the primary preheater is connected with the peculiar smell absorption tower, the cold side outlet of the primary preheater is connected with the inlet of the air blower through a fresh air door, and the outlet of the air blower is connected with the cold side inlet of the secondary preheater; the air return inlet of the distiller's grains fermenting machine is also connected with the inlet of the blower. The system adopts multi-batch time-sharing fermentation and continuous discharging, improves the utilization rate of equipment, reduces the engineering investment and reduces the energy consumption.

Description

Continuous drying system for batch fermentation of vinasse

Technical Field

The utility model relates to a lees fermentation system especially relates to a lees batch fermentation continuous drying system, belongs to lees fermentation technical field.

Background

The vinasse is the residue left after brewing the wine by rice, wheat, sorghum and the like, is the direct leftovers in the brewing process, contains a certain proportion of grains, can save fine materials for feeding cattle, contains rich crude protein which is about 2 to 3 times higher than the content of corn, also contains various trace elements, vitamins, saccharomycetes and the like, and has very high content of lysine, methionine and tryptophan, which cannot be provided by crop straws.

Since the distillers 'grains have high fiber content (rice hull), low energy content, high water content and are not easy to store, the distillers' grains are used as waste in distillery and are accumulated everywhere.

The vinasse raw material can be used as feed, but if the vinasse raw material is directly fed to animals, the situation that the animals suffer from insufficient nutrition, indigestion and the like can be caused, and the animals can be seriously poisoned by alcohol. And the vinasse is fermented, so that the harmful substances in the vinasse can be absorbed and decomposed by means of the metabolic process of the probiotics, and the effect of non-toxic treatment is achieved. After the vinasse is fermented, the contents of yeast protein and organic acid are increased, the digestion and absorption of animals are facilitated, the intestinal health of the animals is improved, the vinasse is used as leftovers, the vinasse fermented feed has the characteristic of low price, can be effectively used as a supplementary raw material in the breeding industry, has good use effect and economic benefit, and promotes the development of vinasse fermented feed.

Because the vinasse has high moisture, small volume weight and large unit volume and needs aerobic fermentation, the traditional production mode of fermentation and drying in an aerobic fermentation disc or fermentation in a continuous fermentation machine and drying in a roller dryer is mostly adopted in the past.

The traditional vinasse mode has the following disadvantages:

a) The fermentation and drying in the fermentation tower are adopted, so that the equipment utilization rate and the production efficiency are low, and the investment is overlarge;

b) The raw materials have high moisture content, and heat in the production process is not fully recycled, so that heat waste is caused, the energy consumption is increased, and the production cost of the product is increased;

c) The fermentation and drying sections are not continuous, the peak discharge amount is large, the required tail gas treatment device is very large, the investment of tail gas treatment equipment is high, the return rate is low, and the production is not profitable; if the waste water is directly discharged, not only energy is wasted, but also the environment is polluted;

d) The fermentation tower is special equipment for fermentation, the equipment has low temperature resistance, and the process of drying the fermentation materials in the fermentation machine is adopted, so that low-air-temperature drying is absolutely adopted, the drying temperature and the heat utilization efficiency are reduced, the energy consumption is high, and the production cost of the product is improved; and the drying is not uniform, which causes unstable product quality, therefore, the method is not suitable for being used as a drying material.

e) Because a batch fermentation and drying production mode is adopted, the whole process is not easy to adopt continuous and automatic production.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the problem that exists among the prior art, provide a lees batch fermentation continuous drying system, adopt many batches timesharing fermentations, the continuous ejection of compact, improve equipment utilization rate reduces the engineering investment, reduces the energy consumption.

In order to solve the technical problem, the utility model discloses a lees batch fermentation continuous drying system, including many lees fermentation machines, the air intake of each lees fermentation machine is equipped with second grade preheater and tertiary preheater along the air flow direction in proper order, the hot side entry of second grade preheater links to each other with the high temperature hot-water pipe, the hot side export of second grade preheater links to each other with the low temperature hot-water pipe; a hot side inlet of the three-stage preheater is connected with a high-temperature condensate pipe, and a cold side outlet of the three-stage preheater is connected with a condensate water return pipe; the air outlet of each vinasse fermentation machine is connected with the hot side inlet of the primary preheater through a fermentation tail gas discharge pipe, the hot side outlet of the primary preheater is connected with the lower air inlet of the peculiar smell absorption tower, the cold side inlet of the primary preheater is communicated with the atmosphere, the cold side outlet of the primary preheater is connected with the inlet of an air blower through a fresh air door, and the outlet of the air blower is connected with the cold side inlet of the secondary preheater; and the air return inlet of the vinasse fermentation machine is also connected with the inlet of the air blower through an air return adjusting door.

As the utility model discloses an improvement, each the discharge gate of lees fermentation machine links to each other with the lower extreme entry of fermentation lees promotion scraper blade, and the upper end export of fermentation lees promotion scraper blade links to each other with the wet material entry butt joint of tube bank dryer, and the drier export of tube bank dryer links to each other with the entry of material distribution valve, the export of material distribution valve one with the lower extreme entry of fermentation lees promotion scraper blade links to each other, and two exports of material distribution valve link to each other with the entry that the auger was carried to fermentation lees, and the export that the auger was carried to fermentation lees passes through feed airlock valve and links to each other with the pneumatic conveying pipeline, and the export of pneumatic conveying pipeline links to each other with the upper portion entry of active drying tower, and the bottom drying layer below of active drying tower is equipped with the cooling layer, the discharge gate of cooling layer below links to each other with finished product lees output tube through the airlock valve.

As a further improvement of the utility model, the outlet of the top exhaust hood of the tube bundle dryer is connected with the air inlet of the air heater, the air outlet of the air heater is connected with the air inlet of the first cyclone dust collector, the top discharge port of the first cyclone dust collector is connected with the waste heat recovery and purification system, and the bottom discharge port of the first cyclone dust collector is connected with the middle inlet of the fermented distiller's grain lifting scraper through the discharge valve; the periphery of the top exhaust hood of the tube bundle dryer and the periphery of the first cyclone dust collector are respectively provided with a heat tracing steam coil, the heat tracing steam coil and a steam inlet of the tube bundle dryer are respectively connected with a steam generation pipe, and the heat tracing steam coil and a drain outlet of the tube bundle dryer are respectively connected with the high-temperature condensate pipe.

As a further improvement, the cooling layer of active drying tower is aired exhaust and is linked to each other with the air intake of sack filter, the bottom of sack filter pass through the valve of airing exhaust with finished product lees output tube links to each other, and the air outlet of sack filter links to each other with the cooling blower entry, and the cooling blower export links to each other with natural tuber pipe jointly with multi-stage heater's air intake, multi-stage heater's hot air exitus with the bottom drying layer air intake of active drying tower links to each other, and multi-stage heater is along air current direction warm water heating section, congeals water heating section and steam heating section respectively, and the steam generation pipe links to each other with the hot side entry of steam heating section, and the hot side export of steam heating section reaches high temperature condensate pipe links to each other with the hot side entry of congealing water heating section respectively, and congeals the hot side export of water heating section and links to each other with the comdenstion water back flow.

As a further improvement of the present invention, the cold side inlet of the waste heat recovery and purification system is connected with the outlet of the low temperature hot water pipe, and the cold side outlet of the waste heat recovery and purification system is connected with the inlet of the high temperature hot water pipe; and the outlet of the high-temperature hot water pipe is connected with the hot side inlet of the warm water heating section of the multi-stage heater, and the hot side outlet of the warm water heating section of the multi-stage heater is connected with the inlet of the low-temperature hot water pipe.

As a further improvement, the top tail gas discharge port of the active drying tower is connected with the air inlet of the second cyclone dust collector, the bottom of the second cyclone dust collector is connected with the finished product vinasse output pipe through an air-tight valve, and the top discharge port of the second cyclone dust collector is connected with the second-stage drying tail gas treatment system.

As a further improvement, the top row of mouth of peculiar smell absorption tower communicates with each other with the atmosphere through the absorption tower exhaust fan, and the pond moisturizing mouth of peculiar smell absorption tower links to each other with the normal water pipe, and the pond outlet of peculiar smell absorption tower links to each other with the entry of normal water pump, and the export of normal water pump passes through the circulating pump and links to each other with the shower on peculiar smell absorption tower upper portion.

As the further improvement of the utility model, the peculiar smell absorption tower is also matched with an alkali tank, the inlet pipeline of the alkali pump is inserted into the lower part of the alkali tank, the outlet pipeline of the alkali pump is connected with the alkali adding port of the water tank of the peculiar smell absorption tower, and the rotating speed of the alkali pump is controlled by the pH value of the water tank of the peculiar smell absorption tower.

Compared with the prior art, the utility model discloses following beneficial effect has been obtained: 1. the waste heat in the drying, heat tracing and tail gas is fully recycled, the inlet air of the fermentation machine is preheated, the energy consumption is further reduced, part of water is evaporated in the fermentation process, the water content of the discharged material is reduced, and the drying energy consumption is reduced;

2. the heat of the tail gas of the vinasse fermentation machine is fully utilized, the reflux is reasonably carried out, and the heat tracing is carried out on the roof, so that the mixed bacteria pollution caused by dripping of condensed water is avoided;

3. the drying system is divided into two stages of drying, and the first stage of drying adopts a low-energy-consumption tube bundle dryer, so that the steam consumption can be saved, the drying efficiency is high, and the energy unit consumption is low; the secondary drying adopts an integrated drying device of a live drying tower and a cooler, so that the steam consumption is further saved; preheating inlet air of the dryer by using high-temperature condensate water of the tube bundle dryer; the cooling tail gas is directly used as the inlet air of the dryer after being filtered by the cloth bag, and the heat of the cooling air is completely recovered;

4. the whole system has low equipment investment and operation cost and stable product quality.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.

FIG. 1 is a flow chart of a fermentation system of the present invention;

FIG. 2 is a flow chart of a fermentation tail gas treatment system according to the present invention;

fig. 3 is a flow chart of the drying system of the present invention.

In the figure: 1. a vinasse fermentation machine; 1a, an inlet chute of a fermentation machine; 1b, an outlet chute of the fermentation machine; 1c, a condensate pump; 1d, an exhaust adjusting door; 1e, a fermentation tail gas discharge pipe; 1f, a return air adjusting door; 1g, a fresh air door; 1h, a blower; 2. a peculiar smell absorption tower; 2a, a reclaimed water pump; 2b, an exhaust fan of the absorption tower; 2c, an alkali tank; 2d, an alkali pump; 3. a fermented lees lifting scraper plate; 4. a tube bundle dryer; 4a, a top exhaust hood; 5. a material distribution valve; 6. a fermented distiller's dried grain conveying auger; 7. an air supply pipeline; 8. a hot air blower; 9. a first cyclone dust collector; 10. a waste heat recovery purification system; 11. a live state drying tower; 12. a cloth bag filter; 13. a cooling fan; 14. a multi-stage heater; 15. a second cyclone dust collector; G1. a raw steam pipe; G2. a high-temperature condensate pipe; G3. a tube bundle drying tail gas discharge pipe; G4. a reclaimed water pipe; G5. a sewage discharge pipe; G6. a low temperature hot water pipe; G7. a high temperature hot water pipe; G8. a condensed water return pipe; G9. drying the tail gas pipe in an active state; G10. a finished product vinasse output pipe; H1. a primary preheater; H2. a secondary preheater; H3. a tertiary preheater.

Detailed Description

In the following description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, and do not mean that the device must have a specific orientation.

In order to make the technical means, creation characteristics, achievement purpose and efficacy of the utility model easy to understand and understand, the utility model is further explained by combining with the specific figure below.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As shown in fig. 1, the fermentation system of the utility model comprises a lees fermentation machine 1, each lees fermentation machine 1 is an aerobic disc fermentation tower, an air inlet of each lees fermentation machine 1 is sequentially provided with a secondary preheater H2 and a tertiary preheater H3 along the air flow direction, a hot side inlet of the secondary preheater H2 is connected with a high temperature hot water pipe G7, and a hot side outlet of the secondary preheater H2 is connected with a low temperature hot water pipe G6; the hot side inlet of the third-stage preheater H3 is connected with the high-temperature condensate pipe G2, and the cold side outlet of the third-stage preheater H3 is connected with the condensate water return pipe G8.

The air outlet of each vinasse fermentation machine 1 is respectively connected with the hot side inlet of a primary preheater H1 through a fermentation tail gas discharge pipe 1e, the hot side outlet of the primary preheater H1 is connected with a fermentation tail gas treatment system, the cold side inlet of the primary preheater H1 is communicated with the atmosphere, the cold side outlet of the primary preheater H1 is connected with the inlet of an air blower 1H through a fresh air door 1g, and the outlet of the air blower 1H is connected with the cold side inlet of a secondary preheater H2; the return air inlet of the vinasse fermentation machine 1 is also connected with the inlet of the blower 1h through the return air adjusting door 1f.

Wet distillers 'grains with water content of 54% enter the distillers' grains fermentation machine 1 from the inlet elephant trunk 1a of each fermentation machine, are uniformly spread on the material bed, and hot air passes through the material bed from bottom to top to carry out aerobic fermentation. The temperature of fermentation tail gas discharged from an exhaust adjusting door 1d on the upper part of the vinasse fermentation machine 1 is 45 ℃, fresh air entering a hot side of a primary preheater H1 preheats fresh air on a cold side to 30 ℃, fresh air at 30 ℃ is adjusted in flow rate by a fresh air door 1g, is mixed with return air from a return air adjusting door 1f and then is sent to an air inlet of a secondary preheater H2 by a blower 1H, high-temperature hot water at 60 ℃ enters the hot side of the secondary preheater H2 to carry out secondary heating on the mixed air, the water temperature is reduced by 40 ℃, and the mixed air returns to an inlet of a warm water pump 9 for circulation. The mixed air enters an air inlet of a tertiary preheater H3 immediately, the high-temperature condensate water at 150 ℃ heats the mixed air in a tertiary mode, the condensate water after heat release returns to a boiler room through a condensate water return pipe G8, and the mixed air is heated to 45 ℃ and enters the position below a fermentation material bed. The fermentation time of each batch is 24-36h, and because the feed water content is high, a part of water needs to be evaporated in the fermentation process, so that the discharge water content is reduced, and the drying energy consumption is reduced. The heated air is introduced into the fermentation machine to ventilate the fermentation material bed and pre-dry the material, so that the discharging moisture of the fermentation machine is reduced, and the energy consumption of a drying section is saved. The water content of the fermented vinasse is 44%, and the fermented vinasse is discharged from a discharge hole of the vinasse fermentation machine 1 and then enters an outlet chute 1b of the fermentation machine. According to the feeding and discharging sequence, the fermented drying system can continuously produce.

The ceiling of the vinasse fermentation machine 1 is easy to generate condensed water, and the mixed bacteria pollution of materials is caused after the condensed water is dripped. In order to avoid the generation of condensed water on the ceilings, ceiling heat tracing pipes are respectively arranged in each ceiling, the inlets of the ceiling heat tracing pipes are connected with the outlets of a condensed water pump 1c, the inlets of the condensed water pump 1c are connected with a high-temperature condensed water pipe G2, the outlets of the ceiling heat tracing pipes are connected with a condensed water return pipe G8, and the condensed water after heat tracing returns to a boiler room through the condensed water return pipe G8.

As shown in fig. 2, the fermentation tail gas treatment system comprises a peculiar smell absorption tower 2, wherein a hot side outlet of a primary preheater H1 is connected with a lower air inlet of the peculiar smell absorption tower 2, a top discharge outlet of the peculiar smell absorption tower 2 is communicated with the atmosphere through an absorption tower exhaust fan 2b, a water tank water replenishing port of the peculiar smell absorption tower 2 is connected with a reclaimed water pipe G4, a water tank water outlet of the peculiar smell absorption tower 2 is connected with an inlet of a reclaimed water pump 2a, and an outlet of the reclaimed water pump 2a is connected with a spray pipe at the upper part of the peculiar smell absorption tower 2 through a circulating pump; the peculiar smell absorption tower 2 is also matched with an alkali tank 2c, an inlet pipeline of an alkali pump 2d is inserted into the lower part of the alkali tank 2c, and an outlet pipeline of the alkali pump 2d is connected with a water tank alkali adding port of the peculiar smell absorption tower 2.

The tail gas that gets into from the lower part of peculiar smell absorption tower 2 of the hot side exhaust of one-level preheater H1, be equipped with the one-level spraying from top to top in the peculiar smell absorption tower 2 in proper order, second grade packing layer and defroster, the vaporific spray surface of every nozzle toper, cover the cross section of whole absorption tower, the circulating water adopts the normal water that has added alkali lye, because peculiar smell in the tail gas is acidic material and water soluble material, the peculiar smell dissolves in alkali lye, the tail gas exhaust is outdoor, the second grade packing layer is for further increasing the heat transfer area of circulating water and tail gas, adopt two-layer packing to be more even after the upper packing layer for the circulating water passes through the lower packing layer, it is more even to increase circulating water and tail gas contact, increase absorption efficiency. And discharging the circulating water to a sewage treatment plant after the circulating water reaches the set concentration, and supplementing the reclaimed water of the sewage treatment plant into the equipment to be used as washing circulating water. The amount of the liquid caustic added is controlled by a pH value sensor in the circulating water. And the drainage water of the sedimentation tank at the bottom of the peculiar smell absorption tower 2 is discharged into a sewage treatment plant through a sewage discharge pipe G5.

As shown in fig. 3, the discharge port of each distiller's grain fermentation machine is connected with the lower end inlet of the fermentation distiller's grain lifting scraper 3, the upper end outlet of the fermentation distiller's grain lifting scraper 3 is butted with the wet material inlet of the tube bundle drying machine 4, and the fermentation distiller's grains with the water content of 44% enter the tube bundle drying machine 4 to be subjected to primary drying. The shaft end of the discharge end of the tube bundle dryer 4 is provided with a rotary joint, and a steam inlet of the rotary joint is connected with the steam generation pipe G1. Raw steam enters the tube bundle from the discharge end, namely the front end, in the drying process, the steam in the tube bundle advances from front to back, fermented vinasse outside the tube bundle advances from back to front while stirring, and the steam and the fermented vinasse reversely flow. The just entered vinasse has highest humidity and lowest temperature, and still has better heating and drying effects when contacting with the exhausted steam after heat release; along with the stirring of lees and forward movement, self humidity reduces, the temperature improves, and the fresh steam heat transfer that just gets into the higher temperature has fine heating and drying effect throughout, and the dried lees of doing after the drying is discharged from the drier export of front end, and the moisture content falls to 22% wt.

The dry material outlet of the tube bundle dryer 4 is connected with the inlet of a material distribution valve 5, the first outlet of the material distribution valve 5 is connected with the lower end inlet of the fermented distiller's grains lifting scraper 3, and the second outlet of the material distribution valve 5 is connected with the inlet of a fermented distiller's grains conveying auger 6. After the fermented distiller's grains with the water content of 22% are discharged from a dry material outlet of the tube bundle dryer 4, the fermented distiller's grains are distributed by the material distribution valve 5, and one part of the fermented distiller's grains return to the fermented distiller's grains dried conveying auger 6 and enter the tube bundle dryer 4 again, so that the feeding humidity of the tube bundle dryer 4 is reduced, the material properties are improved, and the tube sticking probability is reduced. The other part is conveyed into a secondary drying system by a fermented dried distillers' grain conveying auger 6.

The drain outlet of the tube bundle dryer 4 is connected with a high-temperature condensate pipe G2, and the drained high-temperature condensate water with the temperature of 150 ℃ is collected and used as the heat source of the distiller's grains fermentation machine 1 and the active drying tower 11.

The top of tube bank desiccator 4 is equipped with top exhaust hood 4a, and the export of top exhaust hood links to each other with the air intake of air heater 8, and the air outlet of air heater 8 links to each other with the air intake of cyclone, and the bottom of cyclone is arranged the material and is passed through the discharge valve and also get into in the middle part entry of fermentation lees promotion scraper blade 3. The top discharge port of the first cyclone dust collector is discharged through a tube bundle drying tail gas discharge pipe G3, the primary drying tail gas discharged from the tube bundle drying tail gas discharge pipe G3 is 85 ℃, enters the waste heat recovery and purification system 10 to recover heat and purify, and the waste heat of the primary drying tail gas is utilized to heat warm water at the temperature of 40 ℃ to 60 ℃ to be used as an air preheating heat source for the vinasse fermentation machine 1 and secondary drying.

Under the suction action of the hot air blower 8, hot tail gas generated by heating and evaporating wet distiller grains is discharged from the top exhaust hood 4a. Because the tail gas has high moisture content and high relative humidity of air, condensed water is easily formed on the top exhaust hood 4a to form a condensation phenomenon, the condensed water formed after condensation drips on a heat exchange tube of the tube bundle dryer 4 to accelerate the corrosion of the heat exchange tube, a heat tracing steam coil is arranged on the periphery of the top exhaust hood 4a to avoid the formation of condensation on the top exhaust hood 4a, the inlet of the heat tracing steam coil is connected with a steam generation tube G1, and the condensed water of the heat tracing steam coil enters a high-temperature condensed water tube G2 to be collected.

The hot air blower 8 sends the hot tail gas into the cyclone dust collector I9 for centrifugal separation, the separated particles return to the fermented wine lees lifting scraper blade 3 through a discharge valve, and the high-temperature tail gas at 85 ℃ is discharged through a drying tail gas discharge pipe G3. The first cyclone dust collector 9 is easy to form condensed water to form a condensation phenomenon, water and materials are mixed to form wet materials after condensation, the wet materials are bonded on the inner wall of the first cyclone dust collector 9 and are easy to cause blockage to affect normal production, a heat tracing steam coil is also arranged on the periphery of the first cyclone dust collector 9 to heat air inside the first cyclone dust collector 9, the relative humidity of the air is reduced, steam in the air cannot form the condensed water, and the condensed water of the heat tracing steam coil also enters a high-temperature condensate pipe G2 to be collected.

The export of fermented distiller's dried grain conveying auger 6 links to each other with wind conveying pipe way 7 through feed airlock, the export of wind conveying pipe way 7 links to each other with the upper portion entry of active drying tower 11, under roots's fan's wind-force effect, the fermented distiller's grain that moisture content is 22% gets into and carries out the secondary drying in the active drying tower 11, the inner chamber of active drying tower 11 is equipped with two-layer at least drying layer usually, bottom drying layer below of active drying tower 11 is equipped with the cooling layer, after the fermented distiller's grain after the secondary drying cools off through the cooling layer, discharge gate below the cooling layer is discharged, and export through airlock and finished product distiller's grain output tube G10.

The cooling layer of the active drying tower 11 exhausts air and is connected with an air inlet of a cloth bag filter 12, the bottom of the cloth bag filter 12 is connected with a finished product vinasse output pipe G10 through an air closing valve, an air outlet of the cloth bag filter 12 is connected with an inlet of a cooling fan 13, an outlet of the cooling fan 13 is connected with an air inlet of a natural air pipe and a multi-stage heater 14, a hot air outlet of the multi-stage heater 14 is connected with an air inlet of a bottom drying layer of the active drying tower 11, the multi-stage heater 14 is respectively provided with a warm water heating section, a condensed water heating section and a steam heating section along the air flow direction, a steam generating pipe G1 is connected with a hot side inlet of the steam heating section, a hot side outlet of the steam heating section and a high-temperature condensed water pipe G2 are respectively connected with a hot side inlet of the condensed water heating section, and a hot side outlet of the condensed water heating section is connected with a condensed water return pipe G8.

A cold side inlet of the waste heat recovery and purification system 10 is connected with an outlet of the low-temperature hot water pipe G6, and a cold side outlet of the waste heat recovery and purification system 10 is connected with an inlet of the high-temperature hot water pipe G7; an outlet of the high-temperature hot water pipe G7 is connected with a hot side inlet of a warm water heating section of the multi-stage heater 14, and a hot side outlet of the warm water heating section of the multi-stage heater 14 is connected with an inlet of the low-temperature hot water pipe G6.

The cooling air discharged from the bottom layer of the active drying tower 11 is about 50 ℃, is filtered by the cloth bag filter 12, is sent into the air inlet of the multi-stage heater 14 by the cooling fan 13, is mixed with the normal-temperature natural air, and then enters the warm water heating section of the multi-stage heater 14, the hot water with the temperature of 60 ℃ output by the waste heat recovery purification system 10 is preheated, the temperature of the hot water is reduced to 40 ℃, and the hot water returns to the waste heat recovery purification system 10 for circulation. Then the hot air is sequentially heated by high-temperature steam condensate and raw steam, the dried high-temperature hot air enters the lower part of the bottom drying layer of the active drying tower 11 and is blown upwards through fermented lees to carry out secondary drying on the fermented lees.

And a tail gas exhaust port at the top of the active drying tower 11 is connected with an air inlet of a second cyclone dust collector 15, the bottom of the second cyclone dust collector 15 is connected with a finished product vinasse output pipe G10 through an air-tight valve, and a exhaust port at the top of the second cyclone dust collector 15 is connected with a secondary drying tail gas treatment system through a fan. And (3) allowing secondary drying tail gas discharged from the top of the active drying tower 11 to enter a second cyclone dust collector 15 for centrifugal separation, recovering material particles, and discharging the secondary tail gas at the temperature of 45 ℃ after the secondary drying tail gas is discharged into a secondary tail gas treatment system through an active drying tail gas pipe G9 for treatment. In order to avoid wall sticking, the outer wall of the second cyclone dust collector 15 is also wound with a heat tracing steam coil.

The foregoing is only a preferred and exemplary embodiment of the present invention, and the basic principles, main features and advantages of the present invention have been shown and described, without thereby limiting the scope of the present invention, which should be understood by those skilled in the art, and the present invention is not limited by the foregoing exemplary embodiments. In addition to the above embodiments, other embodiments of the present invention are also possible without departing from the spirit and scope of the present invention. The utility model discloses still can have various changes and improvements, all adopt the technical scheme that equivalent replacement or equivalent transform formed, all fall in the protection scope that the utility model discloses required. The scope of the invention is defined by the appended claims and equivalents thereof. The technical features of the present invention that have not been described can be realized by or using the prior art, and are not described herein again.

Claims (8)

1. The utility model provides a continuous drying system of lees batch fermentation, includes many lees fermentation machines, its characterized in that: the air inlet of each vinasse fermentation machine is sequentially provided with a secondary preheater and a tertiary preheater along the air flowing direction, the hot side inlet of the secondary preheater is connected with a high-temperature hot water pipe, and the hot side outlet of the secondary preheater is connected with a low-temperature hot water pipe; a hot side inlet of the three-stage preheater is connected with a high-temperature condensate pipe, and a cold side outlet of the three-stage preheater is connected with a condensate water return pipe;

the air outlet of each vinasse fermentation machine is respectively connected with the hot side inlet of the primary preheater through a fermentation tail gas discharge pipe, the hot side outlet of the primary preheater is connected with the lower air inlet of the peculiar smell absorption tower, the cold side inlet of the primary preheater is communicated with the atmosphere, the cold side outlet of the primary preheater is connected with the inlet of an air blower through a fresh air door, and the outlet of the air blower is connected with the cold side inlet of the secondary preheater; and the air return inlet of the vinasse fermentation machine is also connected with the inlet of the air blower through an air return adjusting door.

2. The batch fermentation continuous drying system for distillers' grains according to claim 1, wherein: each the discharge gate of lees fermentation machine links to each other with the lower extreme entry of fermentation lees promotion scraper blade, and the upper end export of fermentation lees promotion scraper blade docks with the wet material entry of tube bank desiccator, and the dry material export of tube bank desiccator links to each other with the entry of material distribution valve, and the export of material distribution valve with the lower extreme entry of fermentation lees promotion scraper blade links to each other, and the export of material distribution valve links to each other with the entry of fermentation lees transport auger, and the export of fermentation lees transport auger passes through feed airlock valve and links to each other with the wind pipeline, and the export of wind pipeline links to each other with the upper portion entry of active state drying tower, and the bottom drying layer below of active state drying tower is equipped with the cooling layer, the discharge gate below the cooling layer passes through the airlock valve and links to each other with finished product lees output tube.

3. The batch fermentation continuous drying system for distiller's grains of claim 2, wherein: an outlet of a top exhaust hood of the tube bundle dryer is connected with an air inlet of the hot air blower, an air outlet of the hot air blower is connected with an air inlet of a first cyclone dust collector, a top discharge port of the first cyclone dust collector is connected with a waste heat recovery and purification system, and a bottom discharge port of the first cyclone dust collector is connected with a middle inlet of the fermented distiller grain lifting scraper through a discharge valve; the periphery of the top exhaust hood of the tube bundle dryer and the periphery of the first cyclone dust collector are respectively provided with a heat tracing steam coil, the heat tracing steam coil and a steam inlet of the tube bundle dryer are respectively connected with a steam generation pipe, and the heat tracing steam coil and a drain outlet of the tube bundle dryer are respectively connected with the high-temperature condensate pipe.

4. The batch fermentation continuous drying system for distiller's grains of claim 3, wherein: the cooling layer of the active drying tower is exhausted air and is connected with an air inlet of a cloth bag filter, the bottom of the cloth bag filter is connected with a finished product vinasse output pipe through an air closing valve, an air outlet of the cloth bag filter is connected with a cooling fan inlet, a cooling fan outlet is connected with an air inlet of a natural air pipe and a multi-stage heater together, a hot air outlet of the multi-stage heater is connected with an air inlet of a bottom drying layer of the active drying tower, the multi-stage heater is respectively connected with a warm water heating section, a condensed water heating section and a steam heating section along the air flow direction, a steam generating pipe is connected with a hot side inlet of the steam heating section, a hot side outlet of the steam heating section is connected with a high-temperature condensed water pipe and is respectively connected with a hot side inlet of the condensed water heating section, and an outlet of the condensed water heating section is connected with condensed water condensate water.

5. The distiller's grains batch fermentation continuous drying system of claim 4, wherein: a cold side inlet of the waste heat recovery and purification system is connected with an outlet of the low-temperature hot water pipe, and a cold side outlet of the waste heat recovery and purification system is connected with an inlet of the high-temperature hot water pipe; the outlet of the high-temperature hot water pipe is connected with the hot side inlet of the warm water heating section of the multi-stage heater, and the hot side outlet of the warm water heating section of the multi-stage heater is connected with the inlet of the low-temperature hot water pipe.

6. The distiller's grains batch fermentation continuous drying system of claim 3, wherein: and a tail gas exhaust port at the top of the active drying tower is connected with an air inlet of a second cyclone dust collector, the bottom of the second cyclone dust collector is connected with the finished product vinasse output pipe through an air-closing valve, and a tail gas exhaust port at the top of the second cyclone dust collector is connected with a secondary drying tail gas treatment system.

7. The batch fermentation continuous drying system for distillers' grains according to claim 1, wherein: the top exhaust outlet of the peculiar smell absorption tower is communicated with the atmosphere through an absorption tower exhaust fan, a water tank water replenishing port of the peculiar smell absorption tower is connected with a reclaimed water pipe, a water tank water outlet of the peculiar smell absorption tower is connected with an inlet of a reclaimed water pump, and an outlet of the reclaimed water pump is connected with a spray pipe on the upper part of the peculiar smell absorption tower through a circulating pump.

8. The batch fermentation continuous drying system for distiller's grains of claim 7, wherein: the peculiar smell absorption tower is also matched with an alkali tank, an inlet pipeline of an alkali pump is inserted into the lower part of the alkali tank, an outlet pipeline of the alkali pump is connected with a water tank alkali adding port of the peculiar smell absorption tower, and the rotating speed of the alkali pump is controlled by the pH value of the water tank of the peculiar smell absorption tower.

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