阅读说明：本技术 提高凝固形态的膏状炼乳的生产工艺 (Production process of paste condensed milk with improved solidification form ) 是由 林向京 施端剑 于 2021-08-17 设计创作，主要内容包括：本发明涉及炼乳技术领域,具体涉及提高凝固形态的膏状炼乳的生产工艺,包括如下步骤：S1：取一定的新鲜的原乳；S2：对原乳进行预热杀菌；S3：浓缩过滤处理；S4：喷雾干燥,将浓缩乳通过固化设备进一步提炼凝固；S5：搅拌冷却。通过将真空浓缩后的浓缩乳,配合设置的干燥机构对浓缩乳进一步的进行干燥,通过将热空气与浓缩乳的接触的关系,能够在热空气流动的过程中,能够使得浓缩乳中的水分进一步的流失,进而使得冷却后的浓缩乳能够保持良好的凝固状态,同时可以通过合理的控制热空气的温度对热交换的效率进行调控而合理的对炼乳的最终凝固状态进行控制,保证较好的凝固形态。(The invention relates to the technical field of condensed milk, in particular to a production process of paste condensed milk for improving the solidification form, which comprises the following steps: s1: taking certain fresh raw milk; s2: preheating and sterilizing the raw milk; s3: concentration and filtration treatment; s4: spray drying, and further refining and solidifying the concentrated milk by a solidifying device; s5: stirring and cooling. Through the condensed milk after with vacuum concentration, the drying mechanism that the cooperation set up is further dry to the condensed milk, through the relation with the contact of hot-air and condensed milk, can be at the in-process that the hot-air flows, can make the further loss of moisture in the condensed milk, and then make the condensed milk after the cooling can keep good coagulation condition, can regulate and control the efficiency of heat exchange through the temperature of reasonable control hot-air simultaneously and the reasonable final coagulation condition to the condensed milk is controlled, guarantee better solidification form.)

1. The production process of the paste condensed milk for improving the solidification form is characterized by comprising the following production steps:

s1: taking certain fresh raw milk, and carrying out pretreatment;

s2: preheating and sterilizing the raw milk; adopting a high-temperature short-time sterilization method or an ultrahigh-temperature instantaneous sterilization method, wherein a sheet type or tubular type sterilizer can be used, the sterilization condition is 80-85 ℃, and the sterilization is kept for 30 seconds; an ultrahigh-temperature instantaneous sterilization device is used for sterilizing at the temperature of 120-150 ℃ for 1-2 seconds;

s3: concentrating and filtering, namely concentrating the raw milk by using a triple-effect vacuum evaporator, concentrating the raw milk to one fourth of the original volume, and filtering the concentrated milk by using a double-shaft filter;

s4: spray drying, and further refining and solidifying the concentrated milk by a solidifying device;

s5: stirring and cooling, cooling to 28-30 ℃ while stirring, keeping for about 1 hour, standing, and further cooling to 12-15 ℃;

the curing equipment comprises a reaction tank (7), the reaction tank (7) is positioned in a closed box, the outer wall of the box is further provided with an air inlet and an air outlet which are communicated with the outside, the upper end of the reaction tank (7) is provided with a drying mechanism through the upper side of a connecting cylinder (10), the upper side of the drying mechanism is provided with a feed hopper (13), the curing equipment further comprises an air supply module, the air supply module comprises an air blowing mechanism and an auxiliary processing mechanism, the air blowing mechanism comprises an air blower (1) which is relatively fixed with the reaction tank (7), and the auxiliary processing mechanism comprises an air filter box (2) arranged at the air inlet of the air blower (1); and the air heater (5) is arranged at an air outlet of the air blower (1), and the air heater (5) conveys hot air into the drying mechanism through a pipe fitting to air-dry the concentrated condensed milk.

2. The process of claim 1, wherein the pre-treatment of S1 comprises filtering raw milk, particularly filtering through a screen, and centrifuging the filtered raw milk after filtering.

3. The production process of the cream condensed milk with the improved solidification form according to claim 1, wherein a placing groove (701) is formed in the middle of the reaction tank (7), a through groove (702) is formed in the outer wall of the lower end of the placing groove (701), the position, located in the through groove (702), of the reaction tank (7) is fixedly provided with a flow guide pipe (8), a motor (9) is fixedly arranged on the bottom surface of the reaction tank (7), and a stirring blade is fixedly arranged on an output shaft of the motor (9) through a coupling and used for stirring and cooling the dried condensed milk.

4. The production process of the pasty condensed milk with the improved solidification form according to claim 2, wherein the drying mechanism comprises two fixing blocks (11) which are symmetrically arranged and fixedly connected with the upper end position of the connecting cylinder (10), one end of each fixing block (11) is fixedly provided with a baffle plate (1101), the top surfaces of the fixing blocks (11) are provided with arc-shaped grooves (1102), the middle parts of the bottom surfaces of the arc-shaped grooves (1102) are provided with communication grooves (1103) in a penetrating manner, the communication grooves (1103) are communicated with the placing groove (701), the upper sides of the fixing blocks (11) are provided with a plurality of partition plates (12) at equal intervals in a linear manner, the two fixing blocks (11) are intermittently distributed between the partition plates (12), the two fixing blocks (11) correspond to the two arranged feeding hoppers (13), and the feeding grooves (1301) are arranged inside the feeding hoppers (13), the feeding groove (1301) corresponds to the communicating groove (1103) in the vertical direction in position, an air outlet pipe (14) is arranged at one end, far away from the baffle plate (1101), of the fixing block (11), an air outlet opening (1401) is formed in one end, close to the fixing block (11), of the air outlet pipe (14), and the air outlet pipe (14) is fixedly connected with an air outlet port (6) of the air heater (5) through a connecting pipe (15).

5. The process for producing condensed cream with improved coagulation ability as claimed in claim 4, wherein the air outlets (1401) are arranged in a symmetrical structure on both sides of the baffle plate (1101) in groups.

6. The production process of the pasty condensed milk with the improved solidification form as claimed in claim 1, wherein the air outlet of the blower (1) is communicated through a three-way pipe (4), the end part of the three-way pipe (4) is fixedly connected with a connecting flange B (501) fixedly arranged on the outer wall of the air heater (5) through a connecting flange A (401), the air inlet part of the blower (1) is connected with the tail end of the air filtering box (2) through a connecting piece (101), and the air inlet end of the air filtering box (2) is fixedly provided with the filter screen (3).

Technical Field

The invention relates to the technical field of condensed milk, in particular to a production process of paste condensed milk with improved solidification form.

Background

Condensed milk is a milk product, and is a beverage made up by using fresh cow milk or goat milk through the processes of disinfection and concentration, and its storage time is long. Usually, most of the water in the fresh milk is removed by vacuum concentration or other methods, and the fresh milk is concentrated to about 25 to 40 percent of the original volume.

Condensed milk aims to remove most of water from fresh milk through vacuum concentration or other methods under the condition of ensuring inconvenient nutritional ingredients of the fresh milk, inhibit the propagation of microorganisms by controlling the environment where the microorganisms grow, thereby improving the quality guarantee time, and after the milk is condensed through a common concentration mode, the precision is not high enough, and simultaneously, because the concentration is incomplete, the solidification effect is not obvious enough, and further the risk of the growth of the microorganisms is higher, a condensed milk production process capable of improving the solidification effect of the condensed milk is provided, so that the storage quality guarantee requirement for a longer time is met.

Disclosure of Invention

Solves the technical problem

Aiming at the defects in the prior art, the invention provides the production process of the paste condensed milk with improved solidification state, which can effectively solve the problems that the precision is not high enough after milk is condensed by a common concentration mode in the prior art, and simultaneously, the risk of microorganism breeding is high due to incomplete concentration and unobvious solidification effect.

Technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme:

the invention provides a production process of paste condensed milk for improving the solidification form, which comprises the following production steps:

s1: taking certain fresh raw milk, and carrying out pretreatment;

s2: preheating and sterilizing the raw milk; adopting a high-temperature short-time sterilization method or an ultrahigh-temperature instantaneous sterilization method, wherein a sheet type or tubular type sterilizer can be used, the sterilization condition is 80-85 ℃, and the sterilization is kept for 30 seconds; an ultrahigh-temperature instantaneous sterilization device is used for sterilizing at the temperature of 120-150 ℃ for 1-2 seconds;

s3: concentrating and filtering, namely concentrating the raw milk by using a triple-effect vacuum evaporator, concentrating the raw milk to one fourth of the original volume, and filtering the concentrated milk by using a double-shaft filter;

s4: spray drying, and further refining and solidifying the concentrated milk by a solidifying device;

s5: stirring and cooling, cooling to 28-30 ℃ while stirring, keeping for about 1 hour, standing, and further cooling to 12-15 ℃;

the curing equipment comprises a reaction tank, wherein the reaction tank is positioned in a closed box body, the outer wall of the box body is further provided with an air inlet and an air outlet which are communicated with the outside, the upper end of the reaction tank is provided with a drying mechanism through the upper side of a connecting cylinder, the upper side of the drying mechanism is provided with a feed hopper, the curing equipment further comprises an air supply module, the air supply module comprises an air blowing mechanism and an auxiliary processing mechanism, the air blowing mechanism comprises an air blower which is relatively fixed with the reaction tank, and the auxiliary processing mechanism comprises an air filter box arranged at the air inlet of the air blower; and the air heater is arranged at the air outlet of the air blower, and conveys hot air into the drying mechanism through the pipe fitting to be used for air-drying the concentrated condensed milk.

Further, the pretreatment in S includes filtration of raw milk, specifically, filtration may be performed by a screen filtration method, and after the filtration treatment, the raw milk after filtration may be centrifuged by a centrifuge.

Further, a placing groove is formed in the middle of the reaction tank, a through groove is formed in the outer wall of the lower end of the placing groove, the reaction tank is located in the through groove and fixedly provided with a flow guide pipe, a motor is fixedly arranged on the bottom surface of the reaction tank, and a stirring blade is fixedly arranged on an output shaft of the motor through a coupler and used for stirring and cooling the dried condensed milk.

Further, the drying mechanism comprises two fixed blocks which are symmetrically arranged and fixedly connected with the upper end of the connecting cylinder, one end of each fixed block is fixedly provided with a baffle, an arc-shaped groove is arranged on the top surface of the fixed block, a communicating groove is arranged in the middle of the bottom surface of the arc-shaped groove in a penetrating way, the communicating groove is communicated with the placing groove, a plurality of partition plates are linearly arranged on the upper side of the fixed block at equal intervals, the two fixed blocks are intermittently distributed between the partition plates and correspond to the two arranged feed hoppers, and a feed chute is arranged in the feed hopper, the feed chute and the communicating chute are corresponding in position in the vertical direction, the one end that the separation blade was kept away from to the fixed block is equipped with the outlet duct, the gas vent has been seted up to the one end that is close to the fixed block on the outlet duct, the outlet duct passes through the connecting pipe and is connected fixedly with air heater's the port of giving vent to anger.

Furthermore, the exhaust ports are distributed on two sides of the baffle plate in a group in a symmetrical structure.

Furthermore, the air outlet of the air blower is communicated with the air outlet of the air blower through a three-way pipe, the end part of the three-way pipe is fixedly connected with a connecting flange B fixedly installed on the outer wall of the air heater through a connecting flange A, the air inlet of the air blower is connected with the tail end of an air filter box through a connecting piece, and a filter screen is fixedly installed at the air inlet of the air filter box.

Advantageous effects

Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:

according to the invention, the concentrated milk after vacuum concentration is further dried by matching with the arranged drying mechanism, and through the contact relationship between the hot air and the concentrated milk, the moisture in the concentrated milk can be further lost in the flowing process of the hot air, so that the cooled concentrated milk can keep a good solidification state, and meanwhile, the heat exchange efficiency can be regulated and controlled reasonably by reasonably controlling the temperature of the hot air, so that the final solidification state of the concentrated milk is controlled reasonably, and a better solidification form is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic overall front view of the curing apparatus of the present invention;

FIG. 2 is a schematic overall side view of the curing apparatus of the present invention;

FIG. 3 is a schematic view of the overall structure of the air supply module of the present invention;

FIG. 4 is a schematic diagram showing the overall explosion structure of the retort and the drying mechanism at the upper side thereof according to the present invention;

FIG. 5 shows the flow direction of the gas at the fixing block when the curing apparatus of the present invention is in use; and condensed milk water evaporation schematic diagram;

FIG. 6 is a front view of the solidification apparatus of the present invention, taken vertically along the direction of flow of the condensed milk;

FIG. 7 is a process flow diagram of the present invention.

The reference numerals in the drawings denote: 1. a blower; 101. a connecting member; 2. an air filtration tank; 3. a filter screen; 4. a three-way pipe; 401. a connecting flange A; 5. an air heater; 501. a connecting flange B; 6. an air outlet port; 7. a reaction tank; 701. a placement groove; 702. a through groove; 8. a flow guide pipe; 9. a motor; 10. a connecting cylinder; 11. a fixed block; 1101. a baffle plate; 1102. an arc-shaped groove; 1103. a communicating groove; 12. a partition plate; 13. a feed hopper; 1301. a feed chute; 14. an air outlet pipe; 1401. an exhaust port; 15. and (4) connecting the pipes.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all 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.

The present invention will be further described with reference to the following examples.

Example (b): the production process of the paste condensed milk with improved solidification form comprises the following production steps:

s1: taking certain fresh raw milk, and carrying out pretreatment;

s2: preheating and sterilizing the raw milk; adopting a high-temperature short-time sterilization method or an ultrahigh-temperature instantaneous sterilization method, wherein a sheet type or tubular type sterilizer can be used, the sterilization condition is 80-85 ℃, and the sterilization is kept for 30 seconds; an ultrahigh-temperature instantaneous sterilization device is used for sterilizing at the temperature of 120-150 ℃ for 1-2 seconds;

s3: concentrating and filtering, namely concentrating the raw milk by using a triple-effect vacuum evaporator, concentrating the raw milk to one fourth of the original volume, and filtering the concentrated milk by using a double-shaft filter;

s4: spray drying, and further refining and solidifying the concentrated milk by a solidifying device;

s5: stirring and cooling, cooling to 28-30 ℃ while stirring, keeping for about 1 hour, standing, and further cooling to 12-15 ℃;

wherein, the curing equipment comprises a reaction tank 7, the reaction tank 7 is arranged in a closed box, and the outer wall of the box is also provided with an air inlet and an air outlet which are communicated with the outside, it should be noted that the arranged reaction tank 7 ensures the fixed connection with the box, the air inlet arranged on the box and the air inlet of the arranged air filter box 2 keep good communication relation, the air outlet arranged on the outer wall of the box keeps the position 1401 which is corresponding to the arranged air outlet pipe 14, the air with certain temperature which is discharged through the air outlet can be discharged from one side position of the baffle plate 1101, the air outlet of the box is correspondingly arranged at the position, the upper end of the reaction tank 7 is provided with a drying mechanism through the upper side of the connecting cylinder 10, the upper side of the drying mechanism is provided with a feed hopper 13, the feed hopper 13 is used for injecting the concentrated milk into the reaction tank 7 from the feed chute 1301, in the process, the concentrated milk can be further dried through the arranged drying mechanism, the moisture in the concentrated milk can be further lost in the flowing process of hot air through the contact relationship between the hot air and the concentrated milk, and the cooled concentrated milk can keep a good solidification state, the solidification equipment further comprises an air supply module, the air supply module comprises an air blowing mechanism and an auxiliary processing mechanism, the air blowing mechanism comprises an air blower 1 which is relatively fixed with the reaction tank 7, and the auxiliary processing mechanism comprises an air filter box 2 arranged at the air inlet of the air blower 1; and the air heater 5 is arranged at an air outlet of the air blower 1, and the air heater 5 conveys hot air into the drying mechanism through a pipe fitting to be used for air-drying the concentrated condensed milk.

The pretreatment in S1 comprises filtering raw milk, specifically filtering by a screen mesh, centrifuging the filtered raw milk by a centrifuge after the filtration treatment, and after the pretreatment is finished, ensuring that the specific gravity of the raw milk is 1.028-1.032 (20 ℃), the acidity is not more than 20 DEG T, the fat content is not less than 3.1%, and the milk solid is not less than 11.5%. The number of mixed bacteria is not more than 20 ten thousand/ml, and the quality of condensed milk after concentration is ensured to meet the standard in the subsequent concentration process.

With reference to fig. 1-6, after the concentrated milk is further dried by the drying mechanism, the concentrated milk can flow into the placing tank 701 through the connection relationship shown in fig. 6, and the stirring blade is fixedly mounted on the output shaft of the motor 9 through the coupling, the concentrated milk in the reaction tank 7 can be further uniformly stirred and cooled, and as an implementation manner, the outer wall of the reaction tank 7 can be provided with a cooling pipe, the concentrated liquid in the placing tank 701 can be stirred and cooled through heat exchange, so as to ensure that the texture of the concentrated liquid is not uniform after the concentrated liquid is completely cooled, the placing tank 701 is provided in the middle of the reaction tank 7, the through groove 702 is provided on the outer wall of the lower end of the placing tank 701, the reaction tank 7 is fixedly mounted with the guide pipe 8 at the through groove 702, through this honeycomb duct 8 that sets up, can derive the concentrate after the primary cooling to carry out one step through collection device to the concentrate and cool off, the bottom surface fixed mounting of retort 7 has motor 9, has stirring vane through shaft coupling fixed mounting on motor 9's the output shaft, is used for the stirring cooling to the condensed milk after the drying.

With reference to fig. 1-6, the drying mechanism is arranged to dry the concentrated solution poured in through the feeding hopper 13, specifically, when the concentrated solution is poured in from the feeding groove 1301, with reference to fig. 6, the flowing direction of the concentrated solution is shown in the figure, in the falling process, after the concentrated solution flows out from the lower end of the feeding groove 1301, the gas with a certain temperature can flow from the side edge of the concentrated solution in the falling process through the air outlet pipe 14 arranged at one side position through the air supply module, and the gas with a high temperature can perform efficient heat exchange after contacting the concentrated solution, in the process, as shown in fig. 5, the moisture in the concentrated solution can be taken away by the high temperature gas with a certain flow rate through the heat exchange, so as to achieve further drying of the concentrated solution, the drying mechanism includes two symmetrically arranged fixed blocks 11 fixedly connected to the upper end position of the connecting cylinder 10, a baffle 1101 is fixedly installed at one end of a fixed block 11, an arc-shaped groove 1102 is formed in the top surface of the fixed block 11, a communication groove 1103 is formed in the middle of the bottom surface of the arc-shaped groove 1102 in a penetrating manner, the communication groove 1103 is communicated with a placing groove 701, a plurality of partition plates 12 are linearly arranged on the upper side of the fixed block 11 at equal intervals, and the plurality of arranged exhaust ports 1401 can be partitioned by the partition plates 12 in the actual drying process, so that in the working process of the drying mechanism, two hot air columns are always positioned at the two sides of the falling concentrated liquid to perform efficient heat exchange on the concentrated liquid falling in a sheet shape, and when the drying mechanism is worthy of attention, as can be known from the foregoing explanation, an air outlet is formed in a box body sleeved outside a reaction tank 7, and is positioned at the position closest to the inner wall of the box body after heat exchange is completed, and the air outlet can extract the gas after heat exchange through an air suction pump, at a certain angle, the efficiency of hot air exchange is further improved by accelerating the flow speed of hot air, and two fixed blocks 11 are intermittently distributed between the partition plates 12, the two fixed blocks 11 correspond to two arranged feed hoppers 13 in position, a feed chute 1301 is arranged inside the feed hoppers 13, the feed chute 1301 corresponds to the communication groove 1103 in position in the vertical direction, an air outlet pipe 14 is arranged at one end, away from the baffle 1101, of the fixed block 11, an air outlet 1401 is arranged at one end, close to the fixed block 11, of the air outlet pipe 14, and the air outlet pipe 14 is fixedly connected with the air outlet port 6 of the air heater 5 through a connecting pipe 15.

With reference to fig. 4, the exhaust port 1401 is arranged to divide the apparatus into two groups by the partition plates 12, specifically, in the operation process of the apparatus, the partition plates 12 that can be arranged are kept relatively sealed, that is, the upper ends of the partition plates 12 that are arranged and the sealing plates inside the case body are kept relatively sealed, the exhaust port 1401 is arranged at two sides of the baffle 1101 in a group in a symmetrical structure, and the two hot air columns are located at two sides of the falling concentrated solution to perform efficient heat exchange on the falling concentrated solution.

With reference to fig. 1-4, the blower 1 is powered on to generate gas, on one hand, the air filter box 2 is arranged at the air inlet of the blower 1 through the auxiliary processing mechanism, and the air filter box 2 can filter impurities from air drawn from the outside of the box; and an air heater 5 arranged at the air outlet of the blower 1, the air heater 5 conveys hot air into the drying mechanism through a pipe fitting for air drying condensed milk, the air outlet of the blower 1 is communicated through a three-way pipe 4, the end part of the three-way pipe 4 is fixedly connected with a connecting flange B501 fixedly arranged on the outer wall of the air heater 5 through a connecting flange A401, the air inlet of the blower 1 is connected with the tail end of an air filter box 2 through a connecting piece 101, and a filter screen 3 is fixedly arranged at the air inlet end of the air filter box 2, the auxiliary processing mechanism can effectively sterilize the air for heat exchange, and the temperature of the heated air can be regulated and controlled through a matched control mechanism of the air heater 5, and the actual heat exchange efficiency can be regulated and controlled through the temperature control, further, the degree of coagulation of the condensed milk obtained by the apparatus can be controlled appropriately.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and the modifications or the substitutions do not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention.