In-line addition homodisper device

Abstract

This utility model belongs to the field of ice cream production technology and discloses an online addition homogenizing and dispersing device, including a feeding and dispersing tank, a feeding pipe, and a feeding tank. The feeding pipe has a first port, a second port, a third port, and a fourth port. Liquid feed enters the feeding pipe through the first port, and toppings enter through the second port. An ultrasonic atomizer is installed at the third port, and the fourth port is connected to the feeding and dispersing tank. The feeding tank is located at the bottom of the feeding and dispersing tank and is connected to it through a conveying pipe. A control valve is installed on the conveying pipe to open and close the conveying pipe. This utility model realizes the simultaneous addition and homogenizing and dispersing of liquid feed and toppings online, and the mixed liquid feed and toppings are discharged into the feeding tank, which directly supplies the freezing machine. This improves the mixing effect and solves the problems of poor mixing effect and potential large liquid feed waste that exist when using a single aging tank for mixing.

Description

Technical Field

[0001] This utility model relates to the field of ice cream production technology, and in particular to an online addition homogenizing and dispersing device. Background Technology

[0002] In the ice cream industry, flavorings, colorings, and other ingredients are added and mixed in aging tanks. Because aging tanks are relatively large, usually over 5 tons, flavorings, colorings, and other ingredients need to be added to the aging tank at least 1 hour in advance. The agitator in the aging tank also needs to be turned on to stir the ice cream mixture inside the tank to ensure that the flavorings, colorings, and other ingredients are mixed evenly with the ice cream mixture. This not only results in a certain loss of aroma but also in energy consumption. Furthermore, during production line debugging or when equipment malfunctions, flavorings, colorings, and other ingredients used for debugging will also be lost and wasted. Utility Model Content

[0003] The purpose of this invention is to provide an online addition homogenizing and dispersing device to solve the problems of poor material mixing effect and potential large material waste that exist when using a single aging tank for mixing.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] Online addition of homogenizing and dispersing devices, including:

[0006] Feeding and dispersing tank;

[0007] A feeding pipe has a first port, a second port, a third port and a fourth port. Liquid feed enters the feeding pipe through the first port, and small particles enter the feeding pipe through the second port. An ultrasonic atomizer is installed at the third port, and the fourth port is connected to the feeding dispersion tank.

[0008] A feeding tank is located at the bottom of the feeding and dispersing tank and is connected to it via a conveying pipe. A control valve is installed on the conveying pipe to open and close the conveying pipe.

[0009] In some embodiments, the third port is located on the wall of the feeding pipe between the second port and the fourth port, the outlet of the ultrasonic atomizer extends into the interior of the feeding pipe, and the outlet of the ultrasonic atomizer has a notch on the side facing the second port.

[0010] In some embodiments, the jetting direction of the ultrasonic atomizer is inclined from the second port toward the fourth port.

[0011] In some embodiments, a distributor is provided in the feeding pipe between the first port and the third port, and the liquid passes through the distributor, which is arranged in a semi-circular array.

[0012] In some embodiments, a liquid conveying pipe is provided at the first inlet, and a flow stabilizer is provided on the liquid conveying pipe.

[0013] In some embodiments, the feed pipe is equipped with a flow meter.

[0014] In some embodiments, a small material conveying pipe is provided at the second port, and a micro-flow rate feeding pump is provided on the small material conveying pipe. The micro-flow rate feeding pump includes a pump housing and a hose. The pump housing has a groove, and the hose is installed in the groove.

[0015] In some embodiments, the depth of the groove is twice the wall thickness of the hose, and the width of the groove is the width of the hose after it has been flattened.

[0016] In some embodiments, the groove is annular or vortex-shaped.

[0017] In some embodiments, the pump housing includes a fixed disk and a rotating disk. The inner side of the fixed disk is provided with the groove, and the outer side of the fixed disk is provided with a first through hole and a second through hole communicating with the groove. A pressure roller is rotatably mounted on the rotating disk. The rotating disk is coaxially arranged with the fixed disk and encapsulates the hose and the pressure roller.

[0018] In some embodiments, the rotating disk is provided with a worm gear transmission assembly, and the driving component drives the rotation of the rotating disk through the worm gear transmission assembly.

[0019] In some embodiments, the feeding dispersion tank includes an outer shell and an inner shell, with a cooling channel provided between the outer shell and the inner shell.

[0020] In some embodiments, the online addition homogenizing and dispersing device further includes a circulation pipeline, the two ends of which are respectively connected to the feed pipe and the first port, and a circulation pump is provided on the circulation pipeline, the circulation pump being configured to circulate the mixture in the feeding and dispersing tank in one direction.

[0021] The beneficial effects of this utility model are:

[0022] The online addition homogenizing and dispersing device provided by this utility model achieves simultaneous addition and homogenization of liquid and small materials by setting a feeding pipe on the feeding and dispersing tank. The ultrasonic atomizer can improve the homogenization and dispersion effect. By setting up a feeding and dispersing tank and a feeding tank, the mixture of liquid and small materials in the feeding and dispersing tank can be discharged into the feeding tank, and the feeding tank can directly supply the material to the freezing machine, which helps to improve the mixing effect and solves the problems of poor mixing effect and potential large waste of liquid in the use of a single aging tank for mixing. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the online addition homogenizing and dispersing device provided in this embodiment of the utility model;

[0024] Figure 2 This is a schematic diagram of the feeding pipe in the online addition homogenizing and dispersing device provided in this embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of the micro-flow rate feed pump in the online addition homogenizing and dispersing device provided in this embodiment of the utility model;

[0026] Figure 4 This is a schematic diagram of the second angle structure of the micro-flow rate feed pump in the online addition homogenizing and dispersing device provided in this embodiment of the utility model (with the rotating disk removed).

[0027] In the picture:

[0028] 100. Freezing machine; 101. Sanitary pump;

[0029] 1. Feeding and dispersing tank; 11. Outer shell; 12. Inner shell; 13. Ultrasonic stirrer; 14. Secondary mechanical stirrer;

[0030] 2. Feeding pipe; 21. First port; 22. Second port; 23. Third port; 24. Fourth port;

[0031] 3. Feed tank; 31. Conveying pipe; 32. Control valve; 33. First mechanical agitator;

[0032] 4. Ultrasonic atomizer; 41. Output end;

[0033] 5. Strand divider;

[0034] 6. Liquid conveying pipe; 61. Flow stabilizing tank; 62. Flow meter;

[0035] 7. Small material conveying pipe;

[0036] 8. Micro-flow rate feed pump; 81. Fixed plate; 811. Groove; 82. Rotating plate; 83. Hose; 84. Pressure roller; 85. Worm gear drive assembly;

[0037] 9. Circulation pipeline; 91. Circulation pump. Detailed Implementation

[0038] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0039] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0042] like Figure 1 As shown, this utility model embodiment provides an online addition homogenizing and dispersing device, which is set at the front end of the freezer 100. It improves the existing mixing method of aging tank, improves the mixing efficiency and mixing effect of liquid and small materials, and reduces the waste of a large amount of raw material resources due to unexpected shutdown failures.

[0043] like Figure 1 and Figure 2 The online addition homogenizing and dispersing device in this embodiment includes a feeding and dispersing tank 1, a feeding pipe 2, and a feeding tank 3. The feeding pipe 2 is used to simultaneously add the liquid and the small material into the feeding and dispersing tank 1 for thorough mixing to obtain a mixture that meets the requirements. The mixture is then discharged into the feeding tank 3. The volume of the feeding tank 3 is larger than that of the feeding and dispersing tank 1, which can realize online mixing of the liquid and the small material and supply the mixture obtained by mixing the two to the feeding tank 3 in stages. The feeding tank 3 then supplies the mixture to the freezer 100. The feeding pipe 2 has a first port 21, a second port 22, a third port 23, and a fourth port 24. Liquid feed enters the feeding pipe 2 through the first port 21, while smaller ingredients enter through the second port 22. An ultrasonic atomizer 4 is installed at the third port 23, and the fourth port 24 connects to the feeding dispersion tank 1. The supply tank 3 is located at the bottom of the feeding dispersion tank 1 and is connected to it via a conveying pipe 31. A control valve 32 is installed on the conveying pipe 31 to open and close it. When the mixture in the feeding dispersion tank 1 meets the feeding requirements, the control valve 32 is opened to discharge the mixture into the supply tank 3. The feeding dispersion tank 1 then mixes the liquid and smaller ingredients for the next cycle. The supply tank 3 supplies the freezing machine 100 for normal ice cream production.

[0044] The online addition homogenizing and dispersing device provided by this utility model achieves simultaneous addition and homogenization of liquid and small materials by setting a feeding pipe 2 on the feeding and dispersing tank 1. The ultrasonic atomizer 4 can improve the homogenization and dispersion effect. By setting up the feeding and dispersing tank 1 and the feeding tank 3, the mixture of liquid and small materials in the feeding and dispersing tank 1 can be discharged into the feeding tank 3, and the feeding tank 3 can directly supply the freezing machine 100. Setting up a smaller volume feeding and dispersing tank 1 for mixing is beneficial to improving the mixing effect. Even in the event of an unexpected shutdown or other failure, the loss is limited to the small volume of the feeding and dispersing tank 1, which is far less than the extent of the loss of all raw materials in the aging tank in the prior art. Setting up a larger volume feeding tank 3 to supply the freezing machine 100 can meet the working efficiency requirements of the freezing machine 100, thereby solving the problems of poor liquid mixing effect and potential large liquid waste caused by using a single aging tank for mixing. It should be noted that the control valve 32 can be automatically controlled by starting a butterfly valve.

[0045] In some embodiments, the third port 23 is located on the wall of the feeding pipe 2 between the second port 22 and the fourth port 24, the outlet 41 of the ultrasonic atomizer 4 extends into the interior of the feeding pipe 2, and the outlet 41 of the ultrasonic atomizer 4 has a notch on the side facing the second port 22.

[0046] like Figure 2As shown, the feeding pipe 2 in this embodiment, an improvement on the Y-shaped pipe, is explained as follows: the first port 21 and the fourth port 24, coaxially arranged, connect to the liquid supply end and the feeding dispersion tank 1, respectively, to feed the liquid. The ultrasonic atomizer 4 is inclinedly arranged at the third port 23, and the spray direction of the ultrasonic atomizer 4 is inclined from the second port 22 towards the fourth port 24, thereby increasing the feeding speed of the liquid. The second port 22 is located on the pipeline section of the ultrasonic atomizer 4, and the axis of the second port 22 is parallel to the axis of the first port 21. Small particles entering through the second port 22 first fall onto the receiving plate of the ultrasonic atomizer 4 and are converted into droplets under the action of ultrasonic vibration and atomization, spraying them towards the liquid, thus achieving preliminary mixing with the liquid. Figure 2 As shown, the end of the ultrasonic atomizer 4 has a notch on the side facing the second port 22 so that small materials fall onto the receiving plate to achieve ultrasonic vibration. The receiving plate is bent on the side facing the second port 22 to form a concave arc surface. The small materials (including flavorings and pigments and other additives) are broken into finer particles and atomized into droplets under the high-frequency vibration of the ultrasonic waves, thereby improving the mixing effect.

[0047] In some embodiments, a distributor 5 is provided in the feeding pipe 2 between the first port 21 and the third port 23. The liquid enters the feeding dispersion tank 1 through the distributor 5, and the distributor 5 is arranged in a semi-circular array.

[0048] like Figure 2 As shown, the function of the distributor 5 is to guide the liquid to flow down in separate streams, and to form a semi-circular or crescent-shaped array on the cross-section along the flow direction, which helps to increase the contact area between the feed and the liquid and improve the mixing effect.

[0049] In some embodiments, a liquid conveying pipe 6 is provided at the first port 21, and a flow stabilizer 61 is provided on the liquid conveying pipe 6.

[0050] In some embodiments, a flow meter 62 is provided on the liquid delivery pipe 6.

[0051] like Figure 1 A conveying pipe is installed between the feed end of the liquid and the first port 21 to supply the liquid. A flow stabilizing tank 61 is installed to temporarily store a portion of the liquid, thereby controlling the supply speed and quantity of the liquid and improving the accuracy of the liquid feed rate measurement. The flow stabilizing tank 61 is positioned close to the first port 21 to reduce the difference in liquid flow velocity between the flow stabilizing tank 61 and the first port 21. A flow meter 62 is installed on the liquid conveying pipe 6 at the inlet end of the flow stabilizing tank 61 to detect the flow velocity of the liquid entering the flow stabilizing tank 61, thus measuring the liquid feed rate. It should be noted that multiple flow stabilizing tanks 61 can be installed according to actual needs, with the flow meter 62 located at the inlet end of the last flow stabilizing tank 61 closest to the first port 21.

[0052] In some embodiments, a small material conveying pipe 7 is provided at the second port 22, and a micro-flow rate feeding pump 8 is provided on the small material conveying pipe 7. The micro-flow rate feeding pump 8 includes a pump housing and a hose 83. A groove 811 is provided on the pump housing, and the hose 83 is installed in the groove 811.

[0053] like Figure 3 and Figure 4 As shown, in this embodiment, the micro-flow rate feed pump 8 is used to achieve micro-flow rate control of small materials in order to obtain precise feeding of small materials. Generally, the micro-flow rate feed pump 8 can be a peristaltic pump, but the peristaltic pumps commonly used in the prior art all have the hose 83 set on the inner circumferential surface of the hub, and the liquid is sucked in and discharged by the rotation of the planetary pressure roller 84; in actual use, the hose 83 will contract inward towards the axis and expand outward under the pressure of the planetary pressure roller 84. After long-term operation, the hose 83 often breaks, and the feeding speed is still relatively large compared to the addition of small materials in this utility model, and the flow rate control is not precise enough. Therefore, as Figure 3 and Figure 4 As shown, the micro-flow rate feed pump 8 provided in this embodiment, by providing a groove 811 on the pump housing, allows the hose 83 to be installed within the groove 811, thereby avoiding the problem of the hose 83 being subjected to contraction and expansion tension, which helps to save the life of the hose 83 and reduce the liquid flow rate within the hose 83. Furthermore, the depth of the groove 811 is twice the wall thickness of the hose 83, and the width of the groove 811 is the width of the hose 83 after it is flattened. It can be understood that by installing the hose 83 within the groove 811, when pressure is applied to the hose 83 to promote fluid flow, the hose 83 only deforms within the groove 811. The flow rate of the outflowing liquid is controlled by the flow rate difference per unit area, such as between the hose 83 and the groove 811, which helps to obtain a smaller flow rate and velocity. This is suitable for controlling small quantities of material, and the groove 811 can prevent the hose 83 from undergoing large deformation, thus protecting the hose 83.

[0054] In some embodiments, the groove 811 is annular or vortex-shaped. The hose 83 is disposed in the groove 811, and the pressure roller 84 that applies pressure to the hose 83 can roll on the surface of the groove 811. Thus, the hose 83 is not limited to being set in a semi-circular arc shape. The hose 83 can be rotated multiple times in the groove 811 to increase the flow distance of the fluid, thereby making it easier to control the fluid speed.

[0055] In some embodiments, the pump housing includes a fixed disk 81 and a rotating disk 82. The inner side of the fixed disk 81 is provided with a groove 811, and the outer side of the fixed disk 81 is provided with a first through hole and a second through hole communicating with the groove 811. A pressure roller 84 is rotatably mounted on the rotating disk 82. The rotating disk 82 is coaxially arranged with the fixed disk 81 and encapsulates the hose 83 and the pressure roller 84.

[0056] like Figure 3 and Figure 4 As shown, in this embodiment, the fixed disk 81 is provided with a groove 811 for fixing and installing the hose 83. The two ends of the hose 83 are respectively provided with a first through hole and a second through hole to form the feed end and the discharge end. The rotating disk 82 has an E-shaped cross-section. The central shaft of the rotating disk 82 is connected to the fixed disk 81 through a bearing. Multiple pressure rollers 84 are arranged circumferentially on the central shaft. A driving component is provided at the end of the central shaft away from the fixed disk 81 to drive the rotation of the rotating disk 82. When the rotating disk 82 rotates, the multiple pressure rollers 84 can roll on the surface of the fixed disk 81, thereby applying pressure to the hose 83 protruding from the surface of the fixed disk 81. The liquid in the hose 83 flows from the feed end to the discharge end.

[0057] In some embodiments, the rotating disk 82 is provided with a worm gear transmission assembly 85, and the driving component drives the rotation of the rotating disk 82 through the worm gear transmission assembly 85.

[0058] The worm gear transmission assembly 85 has a speed reduction function. The drive component adopts a frequency conversion speed regulation or gear speed reduction mechanism, which can further slow down the rotation of the rotating disk 82, thereby achieving slow feeding of small materials. It can be understood that by changing the hose 83 with different diameters, the feeding speed of the small materials can be further controlled. Simultaneously, by calculating the addition ratio of small materials in conjunction with the program, digital feeding of the micro-flow rate feeding pump 8 can be achieved, obtaining a precise output of small materials and completing the small material addition work.

[0059] In some embodiments, the feeding dispersion tank 1 includes an outer shell 11 and an inner shell 12, with a cooling channel provided between the outer shell 11 and the inner shell 12.

[0060] For example Figure 1 The feeding dispersion tank 1 has a double-shell structure. The mixed liquid is located in the cavity formed by the inner shell 12. The cavity between the outer shell 11 and the inner shell 12 serves as a cooling channel. The coolant inlet is located near the bottom of the outer shell 11, and the coolant outlet is located near the top. Cooling water can be selected as the coolant to control the temperature of the mixed liquid in the feeding dispersion tank 1 to 0-6℃, which meets the requirements of normal production.

[0061] In some embodiments, the online addition homogenizing and dispersing device further includes a circulation pipeline 9, with the two ends of the circulation pipeline 9 connected to the conveying pipe 31 and the first port 21, respectively. The circulation pipeline 9 is equipped with a circulation pump 91, which is configured to circulate the mixture in the feeding and dispersing tank 1 in one direction.

[0062] like Figure 1The function of the circulating pump 91 is to pump the mixture from the bottom of the feeding and dispersing tank 1 and re-enter it through the first port 21 at the top, thereby circulating the mixture and improving the mixing effect. The circulating pump 91 can be started simultaneously with the addition of the feed liquid and the small components; that is, the mixture and the feed liquid are added simultaneously through the first port 21 into the feeding pipe 2 to mix with the small components before entering the feeding and dispersing tank 1, which facilitates thorough mixing of the small components and improves mixing efficiency.

[0063] Additionally, the feeding tank 3 is equipped with a first mechanical stirrer 33 to stir the mixture in the feeding tank 3 to maintain the uniformity of the mixture; the feeding dispersion tank 1 is equipped with an ultrasonic stirrer 13 and a second mechanical stirrer 14 to accelerate the mixing speed of the liquid and the small materials. A sanitary pump 101 is installed between the feeding tank 3 and the freezer 100, and the sanitary pump 101 is used to supply the mixture in the feeding tank 3 to the freezer 100 for normal production.

[0064] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An online addition homogenizing and dispersing device, characterized in that, include: Feeding and dispersing tank (1); A feeding pipe (2) has a first port (21), a second port (22), a third port (23) and a fourth port (24). Liquid feed enters the feeding pipe (2) through the first port (21), and small particles enter the feeding pipe (2) through the second port (22). An ultrasonic atomizer (4) is provided at the third port (23). The ultrasonic atomizer (4) is configured to ultrasonically vibrate and atomize the small particles and spray them onto the liquid feed. The fourth port (24) is connected to the feeding dispersion tank (1). The feeding tank (3) is located at the bottom of the feeding and dispersing tank (1) and is connected through the conveying pipe (31). A control valve (32) is provided on the conveying pipe (31) to open and close the conveying pipe (31).

2. The online addition homogenizing and dispersing device according to claim 1, characterized in that, The third port (23) is located on the wall of the feeding pipe (2) between the second port (22) and the fourth port (24). The outlet (41) of the ultrasonic atomizer (4) extends into the interior of the feeding pipe (2). The outlet (41) of the ultrasonic atomizer (4) has a notch on the side facing the second port (22).

3. The online addition homogenizing and dispersing device according to claim 2, characterized in that, The ultrasonic atomizer (4) is inclined from the second port (22) toward the fourth port (24).

4. The online addition homogenizing and dispersing device according to claim 1, characterized in that, A distributor (5) is provided in the feeding pipe (2) between the first port (21) and the third port (23). The liquid passes through the distributor (5), which is arranged in a semi-circular array.

5. The online addition homogenizing and dispersing device according to claim 1, characterized in that, A liquid conveying pipe (6) is provided at the first inlet (21), and a flow stabilizer (61) is provided on the liquid conveying pipe (6).

6. The online addition homogenizing and dispersing device according to claim 5, characterized in that, A flow meter (62) is provided on the liquid delivery pipe (6).

7. The online addition homogenizing and dispersing device according to claim 1, characterized in that, A small material conveying pipe (7) is provided at the second opening (22), and a micro-flow rate feeding pump (8) is provided on the small material conveying pipe (7). The micro-flow rate feeding pump (8) includes a pump casing and a hose (83). A groove (811) is provided on the pump casing, and the hose (83) is installed in the groove (811).

8. The online addition homogenizing and dispersing device according to claim 7, characterized in that, The depth of the groove (811) is twice the wall thickness of the hose (83), and the width of the groove (811) is the width of the hose (83) after it is flattened.

9. The online addition homogenizing and dispersing device according to claim 7, characterized in that, The groove (811) is annular or vortex-shaped.

10. The online addition homogenizing and dispersing device according to claim 7, characterized in that, The pump housing includes a fixed disk (81) and a rotating disk (82). The inner side of the fixed disk (81) is provided with the groove (811), and the outer side of the fixed disk (81) is provided with a first through hole and a second through hole communicating with the groove (811). A pressure roller (84) is rotatably mounted on the rotating disk (82). The rotating disk (82) is coaxially arranged with the fixed disk (81) and encapsulates the hose (83) and the pressure roller (84).

11. The online addition homogenizing and dispersing device according to claim 10, characterized in that, The rotating disk (82) is provided with a worm gear transmission assembly (85), and the driving component drives the rotating disk (82) to rotate through the worm gear transmission assembly (85).

12. The online addition homogenizing and dispersing device according to claim 1, characterized in that, The feeding dispersion tank (1) includes an outer shell (11) and an inner shell (12), and a cooling channel is provided between the outer shell (11) and the inner shell (12).

13. The online addition homogenizing and dispersing device according to claim 1, characterized in that, It also includes a circulation pipeline (9), the two ends of which are connected to the feed pipe (31) and the first port (21) respectively. A circulation pump (91) is provided on the circulation pipeline (9), and the circulation pump (91) is configured to circulate the mixture in the feed dispersion tank (1) in one direction.

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