A birch juice sterilization device with precise temperature control

Abstract

The utility model belongs to birch juice sterilization equipment technical field discloses a temperature control precision's birch juice sterilization equipment, including jar body, the top of jar body is installed with feed port, the bottom of jar body is installed with discharge gate, the inner wall of jar body is installed with the flow guide sleeve that accords with the shape of jar body inner wall, heating mechanism, heating mechanism includes encircles electric heating wire and hollow heat conduction column, the inside installation of hollow heat conduction column has internal heating element, stirring mechanism, stirring mechanism includes main shaft, and main shaft is driven by driving part, and the outer surface of main shaft is installed with multilayer stirring paddle, and the end of stirring paddle is installed with flexible scraper, control system, control system includes PLC controller and at least three temperature sensors. The utility model discloses through double heating structure, all temperature monitoring and PLC dynamic control, can realize the temperature difference of precision control material each area, can eliminate local overheating or sterilization dead angle completely, can improve sterilization pass rate significantly while reserving birch juice active ingredient.

Description

Technical Field

[0001] This utility model relates to the technical field of birch sap sterilization equipment, and in particular to a birch sap sterilization equipment with precise temperature control. Background Technology

[0002] Birch sap is a highly nutritious natural beverage, rich in various vitamins, minerals, and active substances. However, fresh birch sap is extremely prone to spoilage and must be sterilized to extend its shelf life. Currently, the most commonly used sterilization method is pasteurization, which involves heating the birch sap and precisely maintaining it at a specific temperature range (usually between 60°C and 85°C) for a certain period of time to achieve sterilization while preserving nutrients to the maximum extent.

[0003] Existing birch sap sterilization equipment, especially small and medium-sized equipment, mostly uses simple jacketed kettles or coil heat exchangers. These devices generally have the following problems: 1) Inaccurate temperature control: Traditional heating methods (such as bottom heating or single-sided heating) are prone to uneven heating of materials, resulting in local overheating or heating dead zones. Local overheating will destroy the active ingredients and flavor of birch sap, while heating dead zones will lead to incomplete sterilization.

[0004] 2) Low thermal efficiency and high energy consumption: The simple structural design results in low heat exchange efficiency and serious heat loss. More energy is required to reach and maintain the sterilization temperature. Therefore, we propose a birch sap sterilization device with precise temperature control. Utility Model Content

[0005] In view of the problems of inaccurate temperature control, low thermal efficiency, and high energy consumption in the existing birch sap sterilization equipment, this utility model is proposed.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A temperature-controlled birch sap sterilization device includes a tank, with a connected inlet at the top and a connected outlet at the bottom, and a flow guide sleeve that conforms to the shape of the inner wall of the tank. The heating mechanism includes a surrounding electric heating wire installed on the outer wall of the tank and a hollow heat-conducting column installed inside the tank and located on the bottom central axis. An internal heating element is installed inside the hollow heat-conducting column. A stirring mechanism, comprising a main shaft vertically arranged and rotatably mounted inside the tank, the main shaft being driven by a drive component, a multi-layered stirring blade being mounted on the outer surface of the main shaft, a flexible scraper being mounted at the end of the stirring blade, and a flow guide sleeve sleeved over the stirring mechanism; The control system includes a PLC controller installed on the tank and at least three temperature sensors. The PLC controller can independently adjust the power of the surrounding electric heating wire and the internal heating element. The three temperature sensors are installed at different positions inside the tank.

[0007] As a technical solution of the birch sap sterilization equipment with precise temperature control described in this utility model, wherein: the outside of the tank is provided with an insulation jacket filled with insulation material, and the surrounding electric heating wire is located inside the insulation jacket.

[0008] As a technical solution of the birch sap sterilization device with precise temperature control described in this utility model, the hollow heat-conducting column is a heat conductor made of copper or aluminum alloy, and the outer surface of the hollow heat-conducting column is smooth.

[0009] As a technical solution of the birch sap sterilization equipment with precise temperature control according to the present utility model, the driving component is a variable frequency motor, the variable frequency motor is installed on the top of the tank, the output shaft of the variable frequency motor is connected to one end of the main shaft, and the variable frequency motor is electrically connected to the PLC controller.

[0010] As a technical solution of the birch sap sterilization equipment with precise temperature control described in this utility model, a continuous spiral guide plate is installed on the inner wall of the guide sleeve. The spiral direction of the spiral guide plate is matched with the rotation direction of the stirring blade, so that when the stirring mechanism rotates, it drives the material to produce axial movement from top to bottom or from bottom to top.

[0011] As a technical solution of the birch sap sterilization equipment with precise temperature control described in this utility model, the flexible scraper maintains contact with the inner wall of the tank and the inner wall of the guide sleeve when rotating.

[0012] As a technical solution for a birch sap sterilization device with precise temperature control according to this utility model, the three temperature sensors are respectively installed in the upper space of the tank, the middle liquid layer, and the bottom near the discharge port.

[0013] Compared with the prior art, the present invention has at least the following beneficial effects: 1. This utility model, through its dual heating structure, full-area temperature monitoring, and PLC dynamic control, can achieve precise control of the temperature difference in each area of ​​the material, completely eliminate local overheating or sterilization dead zones, and significantly improve the sterilization compliance rate while retaining the active ingredients of birch sap.

[0014] 2. This utility model, through the synergy of heat preservation design, efficient heat conduction and variable frequency stirring, can significantly reduce energy consumption and shorten the sterilization cycle. In addition, the combination of flexible scraper and spiral guide plate can reduce manual cleaning costs, so as to meet the continuous needs of small and medium-sized birch sap production. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them: Figure 1 This is a schematic diagram of the main structure of this utility model.

[0016] Figure 2 This is a cross-sectional structural diagram of the present invention.

[0017] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0018] Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point B.

[0019] Explanation of reference numerals in the attached figures: In the diagram: 1. Tank body; 101. Inlet; 102. Outlet; 201. Surrounding electric heating wire; 202. Hollow heat-conducting column; 203. Internal heating element; 301. Main shaft; 302. Variable frequency motor; 303. Stirring blade; 304. Flexible scraper; 4. Guide sleeve; 401. Spiral guide plate; 501. PLC controller; 502. Temperature sensor; 6. Insulation jacket. Detailed Implementation

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0021] Reference Figures 1-4 A temperature-controlled birch sap sterilization device is provided. This temperature-controlled birch sap sterilization device includes a tank 1. The tank 1 is made of 304 stainless steel (1) and has a volume of 500L to adapt to small and medium-scale production. The top of the tank 1 is equipped with a connected feed inlet 101 and the bottom of the tank 1 is equipped with a connected discharge outlet 102. The inner wall of the tank 1 is detachably equipped with a flow guide sleeve 4 that matches the shape of the inner wall of the tank 1. The heating mechanism includes a circumferential electric heating wire 201 installed on the outer wall of the tank 1 and a hollow heat-conducting column 202 installed inside the tank 1 and located on the central axis at the bottom. The hollow heat-conducting column 202 is equipped with an internal heating element 203 (such as a 3kW stainless steel armored heating rod). The circumferential electric heating wire 201 has a power of 12kW. In application, the cooperation between the circumferential electric heating wire 201 and the internal heating element 203 enables synchronous heating of the tank 1 around the circumference and the central axis, eliminating the problem of local overheating or heating dead zones in traditional equipment, and ensuring temperature uniformity. The stirring mechanism includes a main shaft 301 that is vertically set and rotatably installed inside the tank 1. The main shaft 301 is driven by a drive component. Multiple layers of stirring blades 303 are installed on the outer surface of the main shaft 301. Flexible scrapers 304 (such as food-grade silicone scrapers) are installed at the ends of the stirring blades 303. The flow guide sleeve 4 is fitted with the stirring mechanism. In application, the design of the flexible scraper 304 can scrape off residual materials on the tank wall to avoid component damage and cross-contamination caused by scorching. The control system includes a PLC controller 501 installed on the tank 1 and at least three temperature sensors 502. The PLC controller 501 integrates a touch screen, presets pasteurization programs (adjustable from 60-85℃), sets an upper temperature limit (85℃+2℃), and automatically cuts off the power if the temperature exceeds the limit. The PLC controller 501 can independently control the power of the surrounding electric heating wire 201 and the internal heating element 203. The three temperature sensors 502 are installed at different positions inside the tank 1. In application, the PLC controller 501 dynamically adjusts the heating power based on real-time feedback from the upper, middle, and lower temperature sensors 502, achieving a temperature control accuracy of ±0.5℃ (referencing pasteurization requirements).

[0022] Reference Figure 2 and Figure 3 The tank body 1 is provided with an insulation jacket 6 filled with insulation material (such as polyurethane) on the outside, and the surrounding electric heating wire 201 is located inside the insulation jacket 6. In application, the insulation jacket 6 is designed to reduce heat loss, and the insulation material reduces heat dissipation, thereby reducing energy consumption and maintaining the stability of the temperature inside the tank.

[0023] Reference Figure 2 and Figure 3 The hollow heat-conducting column 202 is a heat conductor made of copper or aluminum alloy, and the outer surface of the hollow heat-conducting column 202 is smooth. In application, the hollow heat-conducting column 202 made of copper / aluminum alloy can accelerate the diffusion of heat from the center to the material, shorten the heating time, and avoid local overheating.

[0024] Reference Figure 1 and Figure 2The driving component is a variable frequency motor 302 with a power of 5.5kW and a speed range of 20-200rpm. The variable frequency motor 302 is installed on the top of the tank 1. The output shaft of the variable frequency motor 302 is connected to one end of the main shaft 301. The variable frequency motor 302 is electrically connected to the PLC controller 501. In application, the variable frequency motor 302 can adjust the stirring speed according to the temperature data through the PLC controller 501 to ensure that the high viscosity material (such as birch sap) flows evenly, thereby improving the efficiency of heat exchange.

[0025] Reference Figure 1 and Figure 2 A continuous spiral guide plate 401 is installed on the inner wall of the guide sleeve 4. The spiral direction of the spiral guide plate 401 is matched with the rotation direction of the stirring blade 303, so that when the stirring mechanism rotates, it drives the material to generate axial movement from top to bottom or from bottom to top. In application, the spiral guide plate 401 and the stirring blade 303 work together to force the material to move axially, eliminate sterilization dead corners, and improve sterilization efficiency.

[0026] Reference Figure 2 and Figure 4 The flexible scraper 304 maintains contact with the inner wall of the tank 1 and the inner wall of the guide sleeve 4 when rotating. In application, the flexible scraper 304 moves in close contact with the tank wall to thoroughly remove the attached substances, reduce the risk of batch-to-batch contamination, and extend the service life of the equipment.

[0027] Reference Figure 2 and Figure 3 Three temperature sensors 502 are respectively installed in the upper space, the middle liquid layer and the bottom near the discharge port 102 of the tank body 1. For example, the upper sensor is 10cm away from the liquid surface, the middle sensor is inserted into the center of the liquid layer and the bottom sensor is near the discharge port 102. In application, the upper, middle and lower monitoring points of the temperature sensor 502 cover different depths of the material and calibrate the temperature difference in real time to ensure that the sterilization temperature meets the standard throughout the process.

[0028] The working principle of this utility model is as follows: Pretreatment stage: After the birch sap is filtered through a 100-mesh filter, it is injected into the tank 1 through the inlet 101, and the liquid level does not exceed 80% of the volume of the tank 1; Sterilization program start-up phase: First, select the sterilization mode on the touch screen of PLC controller 501 (e.g., 72℃±0.5℃, maintained for 15 minutes). Then, PLC controller 501 synchronously starts the surrounding electric heating wire 201 and the inner heating element 203, and the variable frequency motor 302 stirs at 80 rpm. During this period, the data of the three-layer temperature sensor 502 is monitored in real time, and the heating power is dynamically adjusted (e.g., the bottom heating power is increased first to avoid sedimentation). Constant temperature stage: After the target temperature is reached, the PLC controller 501 automatically reduces the heating power to maintain the temperature fluctuation ≤ ±0.3℃, and at the same time the stirring speed is reduced to 40rpm to reduce foam generation; Discharge and cleaning stage: After the timer ends, the PLC controller 501 shuts off the heating mechanism and opens the discharge port 102 to discharge the material. At the same time, the flexible scraper 304 automatically scrapes off the residue on the inner wall during stirring. After the process is completed, the guide sleeve 4 can be removed for deep cleaning.

[0029] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A birch sap sterilization device with precise temperature control, characterized in that: include: The tank (1) has a connected feed inlet (101) installed at the top and a connected discharge outlet (102) installed at the bottom. The inner wall of the tank (1) is fitted with a flow guide sleeve (4) that matches the shape of the inner wall of the tank (1). The heating mechanism includes a surrounding electric heating wire (201) installed on the outer wall of the tank (1) and a hollow heat-conducting column (202) installed inside the tank (1) and located on the bottom central axis. An internal heating element (203) is installed inside the hollow heat-conducting column (202). The stirring mechanism includes a main shaft (301) that is vertically arranged and rotatably installed in the tank (1). The main shaft (301) is driven by a driving component. The outer surface of the main shaft (301) is equipped with multiple layers of stirring blades (303). The end of the stirring blades (303) is equipped with a flexible scraper (304). The guide sleeve (4) is fitted with the stirring mechanism. The control system includes a PLC controller (501) installed on the tank (1) and at least three temperature sensors (502). The PLC controller (501) can independently control the power of the surrounding electric heating wire (201) and the internal heating element (203). The three temperature sensors (502) are installed at different positions inside the tank (1).

2. The birch sap sterilization equipment with precise temperature control according to claim 1, characterized in that: The tank body (1) is provided with an insulation jacket (6) filled with insulation material on the outside, and the surrounding electric heating wire (201) is located inside the insulation jacket (6).

3. The birch sap sterilization equipment with precise temperature control according to claim 1, characterized in that: The hollow heat-conducting column (202) is a heat conductor made of copper or aluminum alloy, and the outer surface of the hollow heat-conducting column (202) is smooth.

4. The birch sap sterilization equipment with precise temperature control according to claim 1, characterized in that: The driving component is a variable frequency motor (302), which is installed on the top of the tank (1). The output shaft of the variable frequency motor (302) is connected to one end of the main shaft (301) for transmission. The variable frequency motor (302) is electrically connected to the PLC controller (501).

5. The birch sap sterilization equipment with precise temperature control according to claim 1, characterized in that: A continuous spiral guide plate (401) is installed on the inner wall of the guide sleeve (4). The spiral direction of the spiral guide plate (401) is matched with the rotation direction of the stirring blade (303), so that when the stirring mechanism rotates, it drives the material to generate axial movement from top to bottom or from bottom to top.

6. The birch sap sterilization equipment with precise temperature control according to claim 1, characterized in that: The flexible scraper (304) remains in contact with the inner wall of the tank (1) and the inner wall of the guide sleeve (4) when it rotates.

7. The birch sap sterilization equipment with precise temperature control according to claim 1, characterized in that: The three temperature sensors (502) are respectively installed in the upper space, the middle liquid layer and the bottom near the discharge port (102) of the tank (1).

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