CN-121970811-A - Whey powder preparation facilities of spray drying and vibration fluidized bed cooperation

CN121970811ACN 121970811 ACN121970811 ACN 121970811ACN-121970811-A

Abstract

The invention is suitable for the technical field of dairy processing, and provides a whey powder preparation device with cooperation of spray drying and a vibrating fluidized bed, which comprises a frame, a pretreatment unit, a spray drying tower unit, a vibrating fluidized bed unit and a closed loop air return unit, wherein the pretreatment unit is fixedly arranged on the frame, the pretreatment unit is in sealed communication with the spray drying tower unit, the spray drying tower unit is in sealed communication with the vibrating fluidized bed unit, the closed loop air return unit is respectively in bidirectional sealed communication with an air exhaust end and an air inlet end of the units, and the whey powder preparation device is characterized in that the whey powder preparation device is prepared continuously at a low temperature through cooperation of a triple progressive structure, can effectively retain heat-sensitive nutrient components of whey, improve lactose crystallinity, solve industry pain points of easy caking of products, greatly reduce production energy consumption and is suitable for industrialized resource utilization of cheese whey byproducts.

Inventors

WANG HAOTAO
LI DONGLI
ZHANG YULU
ZHU ZHE
DU XIANGXIANG
XU DONGHONG
Pan Gaixiang
MA RONG
Zi Baoxia
ZHANG BOXIANG

Assignees

陕西省定边县乳品实业有限公司

Dates

Publication Date: 20260505
Application Date: 20260324

Claims (10)

1. The whey powder preparation device is characterized by comprising a frame (1), a pretreatment unit (2), a spray drying tower unit (3), a vibrating fluidized bed unit (4) and a closed loop return air unit (5), wherein the pretreatment unit (2), the spray drying tower unit (3), the vibrating fluidized bed unit (4) and the closed loop return air unit (5) are fixedly arranged on the frame (1); the discharging end of the pretreatment unit (2) is communicated with the top feeding end of the spray drying tower unit (3) in a sealing way through a high-pressure conveying pipeline; the conical bottom discharge port of the spray drying tower unit (3) is communicated with the head end feed port of the vibrating fluidized bed unit (4) in a sealing way; The air inlet end of the closed loop air return unit (5) is respectively communicated with the tower top air exhaust end of the spray drying tower unit (3) and the tail end air exhaust end of the vibrating fluidized bed unit (4) in a sealing manner, and the air outlet end of the closed loop air return unit (5) is respectively communicated with the tower body air inlet end of the spray drying tower unit (3) and the bed body air inlet end of the vibrating fluidized bed unit (4) in a sealing manner.
2. The device for preparing whey powder by combining spray drying and vibrating fluidized bed according to claim 1, wherein the pretreatment unit (2) comprises a raw material buffer tank (21), a low Wen Nalv concentration component (22), a low-temperature pasteurizer (23) and a high-pressure feed pump (24) which are sequentially communicated in a sealing way; The concentrated solution outlet of the low Wen Nalv concentration assembly (22) is communicated with the feed inlet of the low-temperature pasteurizer (23), the discharge outlet of the low-temperature pasteurizer (23) is communicated with the feed inlet of the high-pressure feed pump (24), and the discharge outlet of the high-pressure feed pump (24) is the discharge end of the pretreatment unit (2).
3. The whey powder preparation device combining spray drying and vibration fluidized bed according to claim 1, wherein the spray drying tower unit (3) comprises a vertical tower body (31), a centrifugal atomizer (32), a low-temperature rotational flow air inlet assembly (33) and a cyclone separator (34); The centrifugal atomizer (32) is fixedly arranged at the center of the top of the vertical tower body (31), and a feed inlet of the centrifugal atomizer (32) is a feed end of the spray drying tower unit (3); The low-temperature rotational flow air inlet assembly (33) is fixedly arranged on the upper side wall of the vertical tower body (31) and is uniformly distributed along the circumferential direction of the vertical tower body (31); The feeding port of the cyclone separator (34) is communicated with the air exhaust end of the top of the vertical tower body (31) in a sealing way, the solid phase outlet of the cyclone separator (34) is communicated with the cone bottom discharging port of the vertical tower body (31) in a sealing way, and the gas phase outlet of the cyclone separator (34) is the air exhaust end of the spray drying tower unit (3).
4. A whey powder preparation device in cooperation with a spray drying and vibrating fluidized bed as claimed in claim 3, wherein the low-temperature cyclone air inlet assembly (33) comprises at least 3 groups of cyclone air inlets (331), the air outlet direction of each group of cyclone air inlets (331) is parallel to the tangential direction of the inner wall of the vertical tower body (31), and the air outlet directions of all the cyclone air inlets (331) are consistent.
5. The device for preparing whey powder by combining spray drying and vibrating fluidized bed according to claim 1, wherein the vibrating fluidized bed unit (4) comprises a horizontal bed body (41), a vibrating driving assembly (42), an air distribution plate (43) and a segmented air chamber (44); the horizontal bed body (41) is fixedly arranged on the frame (1) through a damping spring, and the vibration driving assembly (42) is fixedly arranged on the side wall of the feeding end of the horizontal bed body (41); The air distribution plate (43) is horizontally fixed in the inner cavity of the horizontal bed body (41) to divide the inner cavity of the horizontal bed body (41) into an upper material cavity and a lower air chamber cavity; The sectional air chamber (44) is arranged in the lower air chamber cavity and is sequentially divided into a crystallization heat preservation air chamber (441), a drying air chamber (442) and a cooling air chamber (443) along the material conveying direction of the horizontal bed body (41).
6. The device for preparing whey powder by combining spray drying and vibrating fluidized bed as claimed in claim 5, wherein the tops of the crystallization heat preservation air chamber (441), the drying air chamber (442) and the cooling air chamber (443) are respectively communicated with the corresponding areas of the air distribution plate (43), the side wall of each air chamber is provided with an independent air inlet interface and a PT100 temperature control assembly, and each air inlet interface is hermetically communicated with the air outlet end of the closed loop air return unit (5).
7. The whey powder preparation device with the cooperation of spray drying and vibrating fluidized bed according to claim 1, wherein the closed loop air return unit (5) comprises a pulse bag dust collector (51), a surface cooler (52), a steam heater (53) and a variable frequency centrifugal fan (54) which are sequentially communicated in a sealing manner; The air inlet of the pulse type bag-type dust collector (51) is the air inlet end of the closed-loop air return unit (5), and the air outlet of the variable-frequency centrifugal fan (54) is the air outlet end of the closed-loop air return unit (5).
8. The device for preparing whey powder by combining spray drying and vibrating fluidized bed as claimed in claim 2, wherein the low Wen Nalv concentration component (22) comprises a nanofiltration membrane group (221) and a reverse osmosis membrane group (222) which are connected in series, the molecular weight cut-off of the nanofiltration membrane group (221) is 200-1000Da, the operating pressure of the nanofiltration membrane group (221) and the reverse osmosis membrane group (222) is 1.0-2.5MPa, and the operating temperature range is 10-20 ℃.
9. The whey powder preparation device combining spray drying and vibrating fluidized bed as claimed in claim 5, wherein the air distribution plate (43) is provided with air distribution holes with different apertures corresponding to the crystallization heat preservation air chamber (441), the drying air chamber (442) and the cooling air chamber (443), the apertures of the air distribution holes are sequentially 2mm, 1.5mm and 1mm, the aperture ratio of the air distribution holes is sequentially decreased along the material conveying direction, and the aperture ratio is sequentially 10%, 6% and 2%.
10. The whey powder preparation device cooperated with the spray drying and vibrating fluidized bed according to claim 1, wherein a sealing air locking discharge valve (6) is arranged between a conical bottom discharge port of the spray drying tower unit (3) and a feed port of the vibrating fluidized bed unit (4), the feed port of the sealing air locking discharge valve (6) is connected with a conical bottom discharge port flange of a vertical tower body (31), and a discharge port of the sealing air locking discharge valve (6) is connected with a front end feed port flange of a horizontal bed body (41).

Description

Whey powder preparation facilities of spray drying and vibration fluidized bed cooperation Technical Field The invention belongs to the technical field of dairy processing, and particularly relates to a whey powder preparation device with cooperation of spray drying and a vibrating fluidized bed. Background Whey is a main byproduct in the cheese production process, about 10 tons of whey liquid is produced per 1 ton of cheese produced, and the whey liquid is rich in lactose, whey protein, mineral and other nutritional ingredients, and is a well-known 'nutrition warehouse'. The high-value recycling of the whey is realized by preparing the whey powder, which not only accords with the industrial direction of national circular economy and green low-carbon development, but also solves the problems of environmental pollution caused by direct discharge of the whey and high enterprise treatment cost. At present, the industrialized preparation of whey powder mostly adopts a high-temperature evaporation concentration combined spray drying process, and the matched device has the following prominent technical defects in practical application: The existing device mostly adopts a mode of combining high-temperature multi-effect evaporation concentration with high-temperature instantaneous sterilization at a temperature of more than 60 ℃ in a raw material pretreatment link, the components such as heat-sensitive whey protein, vitamins and the like in whey are easy to generate thermal denaturation and oxidation loss, the denaturation rate of the whey protein is generally more than 15%, the nutritional value of a product is greatly reduced, meanwhile, the heat load of a subsequent drying link is too high due to high-temperature concentration, the production energy consumption is high, and the source management and control of the raw material quality cannot be realized; The spray drying link adopts a single high-temperature direct-injection drying structure, the contact mode of hot air and atomized feed liquid is unreasonable, the control precision of the drying temperature is poor, the air inlet temperature is generally higher than 180 ℃, the inactivation of thermosensitive components is further enhanced, the drying rate of atomized liquid drops is uneven, the particle size distribution width of powder exceeds 40%, the amorphous lactose accounts for more than 30%, the core hidden danger is buried in moisture absorption and agglomeration in the subsequent storage process of the product, and the quality control of the drying process cannot be realized; The synergy of spray drying and a fluidized bed is only a simple series structure, a sectional lactose crystallization, drying and cooling synergistic treatment structure is not provided, the temperature, heat preservation time and crystal form conversion process of lactose crystallization cannot be accurately controlled, the crystallinity of finished lactose is generally lower than 70%, the hygroscopicity is strong, caking is easy to occur in the storage and transportation processes, the fluidity and the quick dissolution of the product are poor, meanwhile, the existing device is not provided with a closed loop return air structure, the waste heat recovery rate is lower than 30% due to direct hot air discharge, the production energy consumption is high, and the quality shaping, energy saving and consumption reduction of a terminal product cannot be realized; There is therefore a need for a whey powder preparation apparatus that cooperates with a vibrating fluidized bed to solve the above problems. Disclosure of Invention An object of an embodiment of the present invention is to provide a whey powder preparation apparatus with cooperation of spray drying and a vibrating fluidized bed, so as to solve the problems set forth in the background art. In order to achieve the above purpose, the present invention provides the following technical solutions: a whey powder preparation device combining spray drying and a vibrating fluidized bed comprises a frame, and a pretreatment unit, a spray drying tower unit, a vibrating fluidized bed unit and a closed loop return air unit which are fixedly arranged on the frame; the discharging end of the pretreatment unit is communicated with the top feeding end of the spray drying tower unit in a sealing way through a high-pressure conveying pipeline; the conical bottom discharge port of the spray drying tower unit is communicated with the head end feed port of the vibrating fluidized bed unit in a sealing way; The air inlet end of the closed loop air return unit is respectively communicated with the tower top air exhaust end of the spray drying tower unit and the tail end air exhaust end of the vibrating fluidized bed unit in a sealing manner, and the air outlet end of the closed loop air return unit is respectively communicated with the tower body air inlet end of the spray drying tower unit and the bed body air inlet end of the vibrating fluidized b