Cold and hot water mixing device and material preheating system

Abstract

The utility model belongs to the field of dairy product processing, and discloses a cold and hot water mixing device which comprises a tank body and flow guide plates arranged in the tank body, flow passing holes are formed in the flow guide plates, the flow passing holes in every two adjacent flow guide plates are distributed in a radial staggered mode to form a spiral turbulent flow channel, and efficient mixing of cold water and hot water can be promoted. The utility model also discloses a material preheating system which comprises a first preheating unit and a second preheating unit, the system utilizes the cold and hot water mixing device to realize that the temperature of water to be subjected to heat exchange is input into the plate heat exchanger together with raw milk for heat exchange, and the temperature of the raw milk after heat exchange is higher than 18 DEG C; and the steam energy consumption of the pasteurization machine can be reduced. According to the utility model, raw milk can be preheated, the original temperature of the raw milk entering the pasteurization machine is increased, and the steam energy consumption of the pasteurization machine is reduced; the preheating device is suitable for production of dairy products or production lines where materials need to be preheated.

Description

TECHNICAL FIELD

[0001] The utility model belongs to dairy product processing field, specifically a cold and hot water mixing device and material preheating system. BACKGROUND

[0002] The pasteurizer is a kind of food processing equipment based on pasteurization method, and its core principle is to kill pathogen in liquid food such as milk by controlling temperature and time, while maximumly preserving nutrient components and flavor, and currently, the sterilization temperature of milk is usually controlled at 95-98 DEG C in factory.

[0003] In current milk processing, raw milk (initial temperature is usually 10-18 DEG C) in ingredient tank is directly transported to pasteurizer for heating sterilization. However, the steam energy consumption of pasteurizer is inversely proportional to the temperature difference of imported material, that is, the lower the initial temperature of raw milk entering pasteurizer, the more steam quantity required for heating to target sterilization temperature, and the higher the energy consumption. For example, when the inlet temperature of raw milk is 10 DEG C, pasteurizer needs to consume more heat energy to increase the temperature to sterilization temperature interval, and the energy consumption is high. SUMMARY

[0004] To solve the above problems in prior art, the utility model aims at providing a cold and hot water mixing device and material preheating system to reduce the steam energy consumption of pasteurizer.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] The utility model provides a cold and hot water mixing device, including the tank body, its inside forms the hollow flow passage that penetrates axially, the top wall or bottom wall of tank body is equipped with the cold water inlet and hot water inlet, and the bottom wall or top wall is equipped with the water outlet, the tank body is along its axial direction interval and is equipped with at least two baffles, baffle is perpendicular to the water flow direction and is equipped with the overflow hole, and the overflow hole on adjacent two baffles is distributed and forms spiral turbulent flow channel in radial staggered distribution.

[0007] As the limitation of the utility model: six baffles are arranged, six baffles are arranged in parallel, a plurality of first overflow holes are arranged on the first baffle close to the bottom wall and the second baffle close to the top wall, one second overflow hole is arranged on each of the four third baffles between the first baffle and the second baffle, and the second overflow holes on adjacent two third baffles are distributed in radial staggered distribution.

[0008] As the further limitation of the utility model: the diameter of second overflow hole is 1 / 4-1 / 3 of the inner diameter of tank body.

[0009] As another limitation of the utility model: the tank side wall is fixed with a mounting ring for connecting with the base body equipment.

[0010] The utility model also provides a material preheating system, including first preheating unit, first preheating unit includes:

[0011] Cold and hot water mixing device;

[0012] Cold water tank, its export end is connected with the tank cold water inlet pipe through the first water pump;

[0013] Hot water tank, its export end is connected with the tank hot water inlet pipe through the second water pump;

[0014] Plate heat exchanger, its water inlet is connected with the tank water outlet through the pipeline, and the discharge port of plate heat exchanger is used to be connected with sterilization equipment.

[0015] As a limitation of the utility model: the pipeline between the first water pump and the tank is provided with a pressure reducing valve and a check valve;The pipeline between the second water pump and the tank is provided with a proportional regulating valve and a check valve.

[0016] As a further limitation of the utility model: it further includes a circulating pipeline and a reversing valve, one end of the circulating pipeline is connected with the water outlet of plate heat exchanger, the reversing valve is arranged at the end of the circulating pipeline away from plate heat exchanger, and the circulating pipeline is connected to CIP clean water tank or cold water tank through the reversing valve.

[0017] As a further limitation of the utility model: it further includes a central control system and a temperature sensor arranged at the tank water outlet, and the temperature sensor, the proportional regulating valve and the reversing valve are electrically connected with the central control system.

[0018] As a further limitation of the utility model: it further includes a second preheating unit, the second preheating unit includes a cold and hot water mixing device and a plate heat exchanger;A temperature sensor is also arranged at the tank water outlet in the second preheating unit, and the temperature sensor is electrically connected with the central control system;The cold water inlet pipe of the tank in the second preheating unit is connected with the first water pump, and the hot water inlet pipe of the tank in the second preheating unit is connected with the second water pump;The water inlet of the plate heat exchanger in the second preheating unit is connected with the tank water outlet through the pipeline, and the discharge port of the plate heat exchanger is used to be connected with sterilization equipment, and the water outlet of the plate heat exchanger is connected to the circulating pipeline through the pipeline.

[0019] As a further limitation of the utility model: the pipeline between the tank in the second preheating unit and the first water pump is provided with a pressure reducing valve and a check valve, and the pipeline between the tank in the second preheating unit and the second water pump is provided with a proportional regulating valve and a check valve;The proportional regulating valve is electrically connected with the central control system.

[0020] Compared with the prior art, the utility model has the beneficial effects that:

[0021] The utility model provides a cold -hot water mixing device, wherein at least two flow guides are arranged in the tank body, the overflow holes on the adjacent two flow guides are distributed in radial staggered mode and form spiral turbulent flow channel.

[0022] The utility model further provides a material preheating system, including first preheating unit, first preheating unit includes cold -hot water mixing device, cold water tank, hot water tank, plate heat exchanger, when working, cold water tank transports cold water to tank body, hot water tank transports hot water to tank body, and cold -hot water is discharged from tank body water outlet to plate heat exchanger after mixing in tank body, and raw milk in batching tank also enters plate heat exchanger, because the water temperature of discharge from tank body water outlet is higher than raw milk, carries out heat exchange with raw milk in plate heat exchanger, and the temperature of raw milk after heat exchange is higher than 18 DEG C, when entering pasteurizer to sterilize with this temperature, the steam energy consumption of pasteurizer can reduce.

[0023] The material preheating system further includes a central control system, and a temperature sensor arranged at the tank body water outlet is used to detect the temperature of the discharged water.

[0024] In summary, the utility model can preheat raw milk, improve the original temperature of raw milk entering the pasteurizer, and reduce the steam energy consumption of the pasteurizer. BRIEF DESCRIPTION OF DRAWINGS

[0025] The utility model will be described further in detail in combination with the drawings and specific embodiments.

[0026] Figure 1 It is the structural schematic diagram of the utility model embodiment 1.

[0027] Figure 2 It is the internal structure schematic diagram of the utility model embodiment 1.

[0028] Figure 3 It is the application structure schematic diagram of the utility model embodiment 2.

[0029] Figure 4 The application structure schematic view of the embodiment 3 of the utility model.

[0030] In the drawing: 1 - jar body, 2 - cold water inlet, 3 - hot water inlet, 4 - water outlet, 5 - first deflector, 6 - second deflector, 7 - third deflector, 8 - first overflow hole, 9 - second overflow hole, 10 - mounting ring, 11 - plate heat exchanger, 12 - batching tank, 13 - first water pump, 14 - second water pump, 15 - cold water pipeline, 16 - hot water pipeline, 17 - pressure reducing valve, 18 - check valve, 19 - proportional control valve, 20 - circulating pipeline, 21 - reversing valve, 22 - CIP clean water tank, 23 - cold water tank, 24 - hot water tank. DETAILED DESCRIPTION

[0031] The preferred embodiments of the utility model are described below in combination with the drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the utility model and do not constitute a limitation on the utility model.

[0032] The orientation words or position relations such as "left", "right" in the embodiments are based on the orientation relations in the drawings of the utility model specification, and are only used to facilitate the description of the utility model and simplify the description, and are not indicative or implied of the specific orientation, specific orientation structure and operation of the device or element, and therefore cannot be understood as a limitation on the content protected by the utility model. Figure 2

[0033] Embodiment 1 cold and hot water mixing device

[0034] As Figures 1-2 ​As shown, the embodiment includes a cylindrical tank body 1, which forms an axial through hollow flow channel inside. The top wall or bottom wall of the tank body 1 is provided with a cold water inlet 2 and a hot water inlet 3, and the corresponding bottom wall or top wall is provided with a water outlet 4. In the embodiment, the cold water inlet 2 and the hot water inlet 3 are arranged on the bottom wall of the tank body 1, and the water outlet 4 is arranged on the top wall. At least two flow guide plates are arranged in the tank body 1 along the axial direction, the flow guide plates are arranged perpendicular to the water flow direction, the flow guide plates are provided with flow holes, and the flow holes on the adjacent two flow guide plates are radially staggered to form a spiral turbulent flow channel. Specifically, in the embodiment, six flow guide plates are arranged, the six flow guide plates are arranged in parallel, the outer contour of the flow guide plate is circular, the diameter of the flow guide plate is the same as the inner diameter of the tank body 1, so that the flow guide plate blocks the water flow and ensures that the water flow can only pass through the flow hole. A plurality of first flow holes 8 are arranged on the first flow guide plate 5 close to the bottom wall and the second flow guide plate 6 close to the top wall, one second flow hole 9 is arranged on each of the four third flow guide plates 7 between the first flow guide plate 5 and the second flow guide plate 6, and the diameter of the first flow hole 8 is smaller than the diameter of the second flow hole 9. The diameter of the second flow hole 9 is 1 / 4-1 / 3 of the inner diameter of the tank body 1, and in the embodiment, the diameter of the second flow hole 9 is 90mm, the diameter of the first flow hole 8 is much smaller than the diameter of the second flow hole 9, and a plurality of first flow holes 8 are densely arranged on the first flow guide plate 5 and the second flow guide plate 6. Figure 2 The number and position of the first flow holes 8 drawn on the first flow guide plate 5 and the second flow guide plate 6 in the figure are only for illustration, and in actual use, the first flow holes 8 are densely arranged and distributed on the first flow guide plate 5 and the second flow guide plate 6.

[0035] The second flow holes 9 on the adjacent two third flow guide plates 7 are radially staggered, as shown in the figure. Figure 2 As shown, the second flow hole 9 on the third flow guide plate 7 close to the first flow guide plate 5 is arranged on the left side, and correspondingly, the second flow hole 9 on the third flow guide plate 7 above the third flow guide plate 7 is arranged on the right side, so as to realize the radial staggered distribution.

[0036] Working principle: cold and hot water enters from the bottom wall of the tank body 1, first flows through the first flow guide plate 5, and then flows through the second flow holes 9 on the four third flow guide plates 7. The radially staggered distribution of the second flow holes 9 causes the cold and hot water flow to be forced to produce radial deflection during the axial advancement, and the alternating centrifugal force and centripetal force generated when the water flow continuously passes through different third flow guide plates 7 can realize efficient mixing of the cold and hot water. Finally, the mixed water that meets the use temperature is discharged from the water outlet 4 of the tank body 1.

[0037] In order to improve the embodiment, the mounting ring 10 is fixed on the side wall of the tank body 1, which is used to connect the tank body 1 with the base body equipment. Here, the base body equipment can be an existing large support or a large detection equipment.

[0038] Embodiment 2: Material preheating system

[0039] This embodiment includes a first preheating unit, such as... Figure 3 As shown, the first preheating unit includes Embodiment 1, a cold water tank 23, a hot water tank 24, and a plate heat exchanger 11. In this embodiment, the cold water tank 23 contains softened water at a temperature of 10-25℃, and the hot water tank 24 contains softened water recovered from the air compressor at a temperature of 60-70℃. The outlet of the cold water tank 23 is connected to the cold water inlet 2 of the tank body 1 via a first water pump 13; this section of the pipeline is the cold water pipeline 15. The outlet of the hot water tank 24 is connected to the hot water inlet 3 of the tank body 1 via a second water pump 14; this section of the pipeline is the hot water pipeline 16. A pressure reducing valve 17 and a check valve 18 are installed on the pipeline between the first water pump 13 and the tank 1 (i.e., the cold water pipeline 15); a proportional regulating valve 19 and a check valve 18 are installed on the pipeline between the second water pump 14 and the tank 1 (i.e., the hot water pipeline 16). The pressure reducing valve 17, proportional regulating valve 19, and check valve 18 are all existing technologies, and their principles will not be detailed here. The drawing of the proportional regulating valve 19 in the figure is for illustrative purposes only. The hot water input is adjusted by regulating the opening of the proportional regulating valve 19, thereby regulating the temperature of the water discharged from the tank 1. Here, both the first water pump 13 and the second water pump 14 are existing centrifugal pumps. In actual applications, the first water pump 13 and the second water pump 14 may be placed inside the cold water tank 23 and the hot water tank 24, respectively. Figure 3 The first water pump 13 and the second water pump 14 are shown in the diagram for illustrative purposes only.

[0040] The inlet of the plate heat exchanger 11 is connected to the outlet 4 of the tank 1 via a pipe. During operation, water that meets the heat exchange temperature and is discharged from the outlet 4 of the tank 1 enters the plate heat exchanger 11. Simultaneously, raw milk (with an initial temperature typically of 10-18℃) from the mixing tank 12 also enters the plate heat exchanger 11 for heat exchange. The outlet of the plate heat exchanger 11 is used to connect to sterilization equipment. For example, after the hot and cold water in the tank 1 are mixed, the water temperature discharged from the outlet 4 of the tank 1 is 30℃. After heat exchange with the raw milk, the raw milk temperature is also 30℃. The raw milk is then discharged from the outlet of the plate heat exchanger 11 and enters the pasteurizer for sterilization. Because the raw milk temperature entering the pasteurizer is 30℃, compared to 10-18℃, the steam energy consumption required for the pasteurizer to raise the raw milk from 30℃ to 95-98℃ is reduced, thus achieving the goal of reducing energy consumption.

[0041] To recycle the softened water in the plate heat exchanger 11, this embodiment also includes a circulation pipeline 20 and a reversing valve 21. One end of the circulation pipeline 20 is connected to the outlet of the plate heat exchanger 11, and the reversing valve 21 is located at the end of the circulation pipeline 20 away from the plate heat exchanger 11. The circulation pipeline 20 is connected to the CIP clean water tank 22 or the cold water tank 23 through the reversing valve 21. The reversing valve 21 is existing technology and has the function of switching between different pipeline flow directions; its principle will not be detailed here. Figure 3The drawing of the heat exchange valve is only as a schematic. The water discharged from the water outlet of the plate heat exchanger 11 is first considered to enter the CIP clean water tank 22 for use, and when the liquid level of the CIP clean water tank 22 is sufficient, the water is discharged to the cold water tank 23 through the reversing valve 21 for re-input into the tank body 1 for use, thereby realizing the recycling of water and saving water resources.

[0042] In order to realize automatic control, the embodiment further comprises a central control system and a temperature sensor arranged at the water outlet 4 of the tank body 1, and the temperature sensor, the proportional regulating valve 19 and the reversing valve 21 are electrically connected with the central control system, which is a prior art. Working principle: The temperature sensor arranged at the water outlet 4 of the tank body 1 is used to detect the temperature of the water discharged from the tank body 1, for example, the set temperature of the discharged water is 30℃, and when the temperature is lower than 30℃, the temperature sensor transmits a signal to the central control system, and the central control system controls the opening degree of the proportional regulating valve 19 to increase the input amount of hot water. In addition, when the liquid level of the CIP clean water tank 22 is sufficient, the sensor in the CIP clean water tank 22 transmits a signal to the central control system, and the central control system controls the reversing valve 21 to make the water in the circulation pipeline 20 flow to the cold water tank 23.

[0043] The use process of the embodiment is as follows: the water in the cold water tank 23 and the water in the hot water tank 24 enter from the bottom wall of the tank body 1, and after effective mixing in the tank body 1, the water temperature is 30℃, which is discharged from the water outlet 4 at the top wall of the tank body 1, enters the plate heat exchanger 11, and the raw milk (10-18℃) in the ingredient tank 12 also enters the plate heat exchanger 11 to exchange heat with the 30℃ water. After heat exchange, the temperature of the raw milk is 30℃, which is discharged from the discharge port of the plate heat exchanger 11 and enters the pasteurizer for sterilization. At the same time, the low-temperature water after heat exchange with the raw milk is discharged from the water outlet of the plate heat exchanger 11, enters the circulation pipeline 20, and is reused in the CIP clean water tank 22 or the cold water tank 23.

[0044] Embodiment 3: Material preheating system

[0045] As shown in Figure 4 , the embodiment adds a second preheating unit on the basis of embodiment 2 for increasing the pasteurization efficiency. As for the parts of embodiment 2, the embodiment will not be described again.

[0046] The second preheating unit comprises the plate heat exchanger 11 of embodiment 1; and a temperature sensor is arranged at the water outlet 4 of the tank body 1 in the second preheating unit, which is electrically connected with the central control system.

[0047] As shown in Figure 2 , 4 , the first water pump 13 is connected with the cold water inlet 2 of the tank body 1 in the second preheating unit, and a pressure reducing valve 17 and a one-way valve 18 are arranged on the pipeline between the tank body 1 in the second preheating unit and the first water pump 13. Specifically, as shown in Figure 4As shown, in the embodiment, a branch pipeline is branched from the cold water pipeline 15 and connected to the tank 1, and a pressure reducing valve 17 and a one-way valve 18 are arranged on the branch pipeline.

[0048] As shown, the second water pump 14 is connected to the hot water inlet 3 of the tank 1 in the second preheating unit by a pipeline, and a proportional adjusting valve 19 and a one-way valve 18 are arranged on the pipeline between the tank 1 in the second preheating unit and the second water pump 14, and the proportional adjusting valve 19 is electrically connected to the central control system. Figure 2 , 4 As shown, in the embodiment, a branch pipeline is branched from the cold water pipeline 15 and connected to the tank 1, and a pressure reducing valve 17 and a one-way valve 18 are arranged on the branch pipeline. Figure 4

[0049] The temperature sensor is used to detect the temperature of the water discharged from the tank 1, and if the temperature of the water is lower than 30℃, the temperature sensor sends a signal to the central control system, and the central control system controls the opening degree of the proportional adjusting valve 19 to increase the input amount of hot water into the tank 1 in the second preheating unit.

[0050] The plate heat exchanger 11 in the second preheating unit has its water inlet connected to the water outlet 4 of the tank 1 by a pipeline, has its discharge port used for being connected to a sterilization device, and has its water outlet connected to the circulating pipeline 20 by a pipeline.

[0051] The use process of the embodiment is the same as that of the embodiment 2, and the difference is that, in the embodiment, the cold water in the cold water tank 23 enters the two tanks 1, and the hot water in the hot water tank 24 also enters the two tanks 1. The water with a temperature of 30℃ discharged from the two tanks 1 respectively enters the plate heat exchanger 11, wherein the tank 1 in the first preheating unit supplies water to one plate heat exchanger 11, and the tank 1 in the second preheating unit supplies water to two plate heat exchangers 11. Finally, the low-temperature water after heat exchange in the three plate heat exchangers 11 all enters the circulating pipeline 20.

[0052] It should be noted that the above only describes the preferred embodiments of the utility model, and is not used to limit the utility model, and although the utility model is described in detail by referring to the above embodiments, for those skilled in the art, the technical scheme recorded in the above embodiments can be modified, or some technical features can be replaced equivalently. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.​

Claims

1. A hot and cold water mixing device, characterized in that, The tank includes a hollow flow channel that runs through the interior. The top or bottom wall of the tank has a cold water inlet and a hot water inlet, and the corresponding bottom or top wall has an outlet. At least two guide plates are spaced apart along the axial direction inside the tank. The guide plates are perpendicular to the water flow direction and have flow holes. The flow holes on two adjacent guide plates are radially staggered to form a spiral turbulent flow channel.

2. The hot and cold water mixing device according to claim 1, characterized in that, There are six guide plates arranged in parallel. The first guide plate near the bottom wall and the second guide plate near the top wall are provided with multiple first flow holes. Each of the four third guide plates between the first and second guide plates is provided with a second flow hole. The second flow holes on adjacent third guide plates are radially staggered. The diameter of the first flow hole is smaller than the diameter of the second flow hole.

3. The hot and cold water mixing device according to claim 2, characterized in that, The diameter of the second overflow orifice is 1 / 4 to 1 / 3 of the inner diameter of the tank.

4. The hot and cold water mixing device according to any one of claims 1-3, characterized in that, An installation ring for connecting to the base equipment is fixed on the side wall of the tank.

5. A material preheating system, characterized in that, The first preheating unit includes: The hot and cold water mixing device according to any one of claims 1-4; The outlet of the cold water tank is connected to the cold water inlet pipe of the tank body via a first water pump. The hot water tank has its outlet connected to the hot water inlet pipe of the tank body via a second water pump. The plate heat exchanger has its inlet connected to the tank outlet via a pipeline, and its outlet is used to connect to sterilization equipment.

6. The material preheating system according to claim 5, characterized in that, A pressure reducing valve and a check valve are installed on the pipeline between the first water pump and the tank; a proportional regulating valve and a check valve are installed on the pipeline between the second water pump and the tank.

7. The material preheating system according to claim 6, characterized in that, It also includes a circulation pipeline and a reversing valve. One end of the circulation pipeline is connected to the outlet of the plate heat exchanger, and the reversing valve is located at the end of the circulation pipeline away from the plate heat exchanger. The circulation pipeline is connected to the CIP clean water tank or cold water tank through the reversing valve.

8. The material preheating system according to claim 7, characterized in that, It also includes a central control system and a temperature sensor installed at the tank outlet. The temperature sensor, proportional control valve, and reversing valve are all electrically connected to the central control system.

9. The material preheating system according to claim 8, characterized in that, It also includes a second preheating unit, which includes the hot and cold water mixing device and the plate heat exchanger as described in any one of claims 1-4; a temperature sensor is also provided at the outlet of the tank in the second preheating unit, which is electrically connected to the central control system; the first water pump is connected to the cold water inlet pipe of the tank in the second preheating unit, and the second water pump is connected to the hot water inlet pipe of the tank in the second preheating unit; the plate heat exchanger in the second preheating unit has its inlet connected to the outlet of the tank through a pipe, its outlet used to connect to the sterilization equipment, and its outlet connected to the circulation pipe through a pipe.

10. The material preheating system according to claim 9, characterized in that, A pressure reducing valve and a check valve are installed on the pipeline between the tank and the first water pump in the second preheating unit. A proportional regulating valve and a check valve are also installed on the pipeline between the tank and the second water pump in the second preheating unit. The proportional regulating valve is electrically connected to the central control system.

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