Reaction tank for water-soluble fertilizer

Abstract

The utility model discloses a reaction tank for a water-based water-soluble fertilizer. The reaction tank comprises a tank body and a stirring and heating device, wherein the tank body is externally wrapped with a heat-insulating layer. The stirring and heating device is an integrated structure of a stirring mechanism and a heating mechanism, the stirring mechanism is mounted on the upper plate, and a rotating shaft is rotationally connected with the lower plate through a bearing; upper and lower blades respectively positioned above and below the lower plate are sleeved on the rotating shaft; and the upper and lower blades respectively stir liquid to flow upwards and downwards. A heating pipe of the heating mechanism is fixedly connected with the upper plate and the lower plate, a heating piece is arranged in the heating pipe, and the heating piece is fixed by an insulating refractory material in the heating pipe and is insulated from the heating pipe. The section of the tank body is elliptical, and the stirring and heating devices are arranged at two focuses of the ellipse. A turning cover covers the feeding port of the tank body, and the tank bottom is spherical or arc-shaped. The heat exchanger is high in heat exchange efficiency, intensifies internal turbulent flow of liquid, and promotes uniform mixing and reaction of raw materials.

Description

Technical Field

[0001] The utility model is applied to the field of water-soluble fertilizer production, and relates to the emulsification reaction of raw materials of water-based water-soluble fertilizers. Specifically, it is a reaction tank capable of heating and stirring. Background Technique

[0002] Water-soluble fertilizers are regarded as the new favorite of fertilizers, and water-soluble fertilizers containing humic acid are also the hot spots in the product production of fertilizer enterprises. Water-soluble fertilizers can be divided into water-based, granular and powder types. The water-based type can be directly sprayed on the leaves of crops, or directly irrigated or sprayed on the land, which is convenient to use, especially more suitable for soil improvement in water-scarce areas. In the production process of water-soluble fertilizers, raw materials and additives of various nutrients need to be added to the reaction stirring tank, and stirred and reacted at a certain temperature to fully mix and dissolve all the raw materials of various components. Therefore, the reaction tank has become the key equipment for the production of water-based water-soluble fertilizers.

[0003] There are many patent applications related to the stirring reaction tank of water-soluble fertilizers. Some are improved on the stirring device. For example, CN211936738U is a stirring device for water-soluble fertilizer production, which adopts a combination of stirring blades and gas stirring, but it is easy to form a stirring dead angle at the bottom of the tank, and the heating component is set at the bottom of the tank, resulting in low heating efficiency. Some adopt different heating methods. For example, CN219091761U is a liquid fertilizer stirring tank, the tank body is of double-layer structure, with water inside, and the tank is heated and cooled by water. The electric heater is set at the bottom of the tank body, and the tank body is heated by heating water, and then the liquid fertilizer is heated, with low heating efficiency. The temperature sensor is set on the outer wall of the tank body, and does not directly measure the reaction temperature of the liquid fertilizer. CN219232334U is a reaction device for liquid water-soluble fertilizers. A heating jacket is arranged on the outer periphery of the tank body, and an electric heating plate is arranged in the heating jacket, and heat-conducting oil is introduced into the heating jacket. The heat-conducting oil is heated by the electric heating plate, and then the liquid water-soluble fertilizer in the tank is heated. Like the aforementioned patents, the indirect heating method is adopted, with low thermal efficiency. CN220071397U is a reaction kettle for water-soluble fertilizers. The heating pipe is located above the stirring head, and the high-temperature water pump sends hot water into the heating pipe. The hot water exchanges heat with the liquid in the tank body through the heating pipe to heat the liquid in the tank body. This scheme is applicable to places with high-temperature waste water, but the temperature cannot be controlled. Content of the Utility Model

[0004] The technical problem solved by the utility model is: aiming at the above problems, a reaction tank for water-based water-soluble fertilizers is provided, in which the heating element is arranged in the liquid water-soluble fertilizer, and the stirring strengthens the liquid turbulence, improving the raw material mixing efficiency and heating efficiency.

[0005] The technical solution adopted by the utility model is as follows: The reaction tank for water-based water-soluble fertilizer comprises a tank body and a stirring and heating device; the stirring and heating device is a structure in which a stirring mechanism and a heating mechanism are installed as a whole through an upper plate and a lower plate, and is fixedly installed on the top plate of the tank body. The stirring mechanism includes a driving mechanism, a rotating shaft, upper blades, a bearing mechanism, and lower blades; the driving mechanism is fixedly installed on the upper plate, and its output end is fixedly connected to the rotating shaft, and the rotating shaft is rotatably connected to the lower plate through the bearing mechanism; the upper blades and the lower blades fixed by set screws are sleeved on the rotating shaft; the upper blades are located above the lower plate, and the lower blades are located below the lower plate; after the rotating shaft rotates, the upper blades stir the liquid to flow upward to avoid air entrainment, and the lower blades stir the liquid to flow downward to drive the sediment at the bottom of the tank. The heating mechanism includes a terminal, a heating tube, insulating refractory material, and a heating element; the heating tubes are evenly distributed around the rotating shaft in a circumferential manner and are fixedly connected to the upper plate and the lower plate, and a heating element is arranged in the heating tube, and the heating element is fixed by the insulating refractory material in the heating tube, insulated from the heating tube, and connected to the terminal on the upper surface of the upper plate through a wire. The outer surface of the tank body is wrapped with a heat-insulating layer, and the upper surface of the upper plate is covered with a heat-insulating layer to prevent heat dissipation.

[0006] Furthermore, the cross-section of the tank body is oval, and the stirring and heating device is arranged at two foci of the ellipse; the cross-section of the tank body is circular, and the stirring and heating device is arranged at the center of the circle. An inner wall thermocouple is arranged on the inner wall of the tank body far away from the heating mechanism; a central thermocouple is arranged on the near side of the heating tube.

[0007] Furthermore, a flip cover is covered on the feeding port of the tank body, and the flip cover is either rotatably connected to the upper plate or matched with the groove on the top plate. Opening or pushing open the flip cover facilitates feeding and observation.

[0008] Furthermore, the bottom of the tank body is spherical or arc-shaped to avoid forming a dead zone. A discharge port or a cleaning port is arranged at the lowest point of the tank body.

[0009] The beneficial effects of the utility model are as follows: In the utility model, the effective heating section of the heating tube is completely immersed in the liquid, and the heat exchange efficiency is high. Under the condition that the liquid surface is basically calm, the upper and lower blades strengthen the turbulence inside the liquid, promoting the uniform mixing and reaction of the raw materials. Description of the Drawings

[0010] Figure 1 is the front view schematic diagram of Embodiment 1 and also the Figure 2 B-B sectional view schematic diagram;

[0011] Figure 2 is Figure 1 top view schematic diagram;

[0012] Figure 3 is Figure 1 A-A sectional view schematic diagram;

[0013] Figure 4 It is the front view schematic diagram of Embodiment 2;

[0014] Figure 5 is Figure 4 the top view schematic diagram of;

[0015] In the figure: 1 - top plate, 2 - thermocouple, 3 - stirring mechanism, 4 - upper plate, 5 - flip cover, 6 - heating mechanism, 7 - tank body, 8 - lower plate, 9 - heat insulation layer, 10 - discharge port, 11 - cleaning port;

[0016] 21 - inner wall thermocouple, 22 - center thermocouple;

[0017] 31 - driving mechanism, 32 - rotating shaft, 33 - upper blade, 34 - bearing mechanism, 35 - lower blade;

[0018] 61 - terminal, 62 - heating tube, 63 - insulating refractory material, 64 - heating element. Specific embodiments Embodiment 1

[0019] The reaction tank structure of the aqueous water-soluble fertilizer is as shown in the appendix Figures 1-3 shown, including the tank body 7, the stirring mechanism 3, the heating mechanism 6, etc. The cross-section of the tank body 7 is oval, as shown in the appendix Figure 2 shown. Stirring and heating devices are respectively arranged at the two foci of the ellipse. The stirring and heating device is a stirring mechanism 3 and a heating mechanism 6 which are installed as an integral structure through the upper plate 4 and the lower plate 8.

[0020] The stirring mechanism 3 includes a driving mechanism 31, a rotating shaft 32, upper blades 33, a bearing mechanism 34, lower blades 35, etc., as shown in the appendix Figure 1 shown. The driving mechanism 31 is a frequency conversion motor and a reducer, which is fixedly installed on the upper plate 4, and its output end is fixedly connected to the rotating shaft 32. The rotating shaft 32 is rotationally connected to the lower plate 8 through the bearing mechanism 34. Upper blades 33 and lower blades 35 are sleeved on the rotating shaft 32, and the upper and lower blades can rotate driven by the rotating shaft. The upper blade 33 is located above the lower plate 8, and the lower blade 35 is located below the lower plate 8. After the rotating shaft rotates, the two blades stir the liquid to promote the liquid flow according to the arrow shown in the appendix Figure 1 shown. The upper blade stirs the liquid to flow upward, and the lower blade stirs the liquid to flow downward, thereby forming a negative pressure at the lower plate, promoting the liquid around to flow towards the lower plate, reducing the resistance of the lower plate to the liquid flow. At the same time, the lower plate is used to strengthen the liquid turbulence and promote the mixing reaction of components. The upper and lower blades are fixed on the rotating shaft with set screws, and the up and down positions of the upper blade 33 and the lower blade 35 on the rotating shaft 32 can be adjusted through the set screws, corresponding to the liquid level in the tank and the distance from the bottom of the tank.

[0021] The heating mechanism 6 includes a terminal 61, a heating tube 62, an insulating refractory 63, a heating element 64, etc. The terminal 61 is fixed on the upper surface of the upper plate. The heating tubes 62 are circumferentially distributed around the rotating shaft 32 and are fixedly connected to the upper plate 4 and the lower plate 8. A heating element 64 is arranged in the heating tube 62. The heating element 64 is fixed by the insulating refractory 63 in the heating tube 62, is insulated from the heating tube 62, and is connected to the terminal 61 through a wire for power-on heating.

[0022] In this embodiment, three temperature-measuring thermocouples 2 are installed. One is the inner-wall thermocouple 21, which is arranged on the inner wall of the tank body far from the heating mechanism 6, and two center thermocouples 22 are arranged near the heating tube 62. As shown in the appendix Figure 2 As shown, the on-off heating power of the heating mechanism 6 is controlled by the temperature of the center thermocouple 22, and the stirring speed is controlled by the temperature difference between the inner-wall thermocouple 21 and the center thermocouple 22.

[0023] The upper plate of the stirring mechanism 3 is installed on the top plate 1 of the tank body. On the outside of the upper plate, a flip cover 5 is rotatably connected. The flip cover covers the feeding port of the tank body. When feeding or observing the inside of the tank, the flip cover is opened. When heating and stirring the reaction, the flip cover 5 is covered. To prevent heat dissipation from the inside of the tank body, a heat-insulating layer 9 is wrapped around the outer wall of the tank body. Similarly, heat-insulating layers are also covered on the upper plate and the top plate. Since the reaction heating inside the tank is about 70°C - 80°C, the heat-insulating materials on the upper plate and the top plate should not be water-absorbing materials, or the flip cover should be sealed. The heat-insulating materials on the upper plate and the top plate also serve the function of fixing the wires.

[0024] The bottom of the tank body 7 is spherical or arc-shaped. A discharge port 10 and a cleaning port 11 are arranged at the lower part of the tank body. The cleaning port 11 is installed at the bottom of the tank body, and the discharge port 10 is higher than the connecting edge of the two spherical or arc-shaped bottoms.

[0025] When this embodiment is used, the flip cover is opened, and raw materials such as water, animal fat, and vegetable oil are added from the feeding port. At the same time, the stirring mechanism is started. When the liquid level of the raw materials is higher than the height of the heating element in the heating tube, power is supplied for heating. Under the action of the auxiliary agent, the animal fat and vegetable oil undergo an emulsification reaction to generate unsaturated fatty acids dissolved in water. Then, lignin, etc. are added, and heating and stirring are carried out again to generate a water-based water-soluble fertilizer semi-finished product. During the heating reaction process, the power-on power of the heating element is controlled by the temperature of the center thermocouple, and the stirring mechanism is controlled by the temperature difference between the inner-wall thermocouple and the center thermocouple. After the reaction is completed, the power is cut off, and heating and stirring are stopped. The liquid in the tank is allowed to stand and precipitate. The flip cover is opened for heat dissipation. When the temperature drops to 40°C - 50°C, the discharge port is opened, and the water-based water-soluble fertilizer semi-finished product is pumped to the storage tank at the next station by a pump. After pumping, the discharge port is closed. First, the stirring mechanism is started, and then the cleaning port is opened to discharge the residues insoluble in water from the cleaning port.

[0026] In this embodiment, the upper blades stir the liquid to flow upward, preventing air from being involved, and the lower blades stir the liquid to flow downward, which can push the sediment at the bottom of the tank into the liquid. The heating tubes are evenly distributed near the stirring blades, causing the liquid to form a large-scale turbulence, which not only accelerates the heat exchange but also facilitates the contact reaction of the raw materials. The lower plate is rotationally connected to the positioning rotating shaft, making the rotation of the rotating shaft stable. The rotating shaft only bears torque and does not bear bending moment, and the lower plate also helps to increase the turbulence of the liquid. The spherical or arc-shaped tank bottom avoids dead zones and helps with the flow and mixing of the liquid. Two stirring and heating devices are arranged at the two foci of the ellipse of the tank body, and the rotation directions of their rotating shafts can be controlled separately. The liquid can be quickly and evenly mixed by rotating in the same or opposite directions, quickly or slowly, so that the temperature difference between the inner wall thermocouple and the central thermocouple can be quickly adjusted, making the liquid temperature uniform. Embodiment 2

[0027] In view of the fact that there are many manufacturing processes and high manufacturing costs for the tank bottom in Embodiment 1, this embodiment uses a circular tank body, and a set of stirring and heating devices is arranged at the center of the tank body, as shown in the attached Figure 4 and the attached Figure 5 shown. Except for the above changes, 1) the rotational connection of the flip cover 5 is changed to a groove fit with the top plate, as shown in the enlarged view in the attached Figure 1 . The groove fit helps with the sealing of the tank body, and it can also be pushed open for feeding and observation. 2) The cleaning port is changed to a discharge port 10. After the reaction is completed, the liquid in the tank can be pumped to the storage tank at the next station, where it is cooled and left to stand, improving the production efficiency of the tank body. In Embodiment 1, the cleaning port can also be changed to a discharge port 10, and it is cooled and left to stand in the storage tank.

[0028] Compared with Embodiment 1, in this embodiment, only the method of adjusting the blade rotation speed can be used to adjust the temperature difference between the inner wall thermocouple and the central thermocouple, and the means is relatively single.

[0029] The design concept of the present utility model is to strengthen the internal turbulence of the liquid under the condition that the liquid surface is basically calm, which promotes the uniform mixing and reaction of the raw materials and also improves the heating efficiency. Compared with the tank body with heating devices arranged on the tank wall or the tank bottom, the present utility model has a high heating efficiency.

Claims

1. A reaction tank for aqueous water-soluble fertilizer, comprising a tank body and a stirring and heating device; characterized in that: The stirring and heating device is a structure in which the stirring mechanism (3) and the heating mechanism (6) are installed as a whole through the upper plate (4) and the lower plate (8), and is fixedly installed on the top plate of the tank body; The stirring mechanism (3) includes a driving mechanism (31), a rotating shaft (32), upper blades (33), a bearing mechanism (34), and lower blades (35); the driving mechanism (31) is fixedly installed on the upper plate (4), and its output end is fixedly connected to the rotating shaft (32), and the rotating shaft (32) is rotatably connected to the lower plate (8) through the bearing mechanism (34); upper blades (33) and lower blades (35) fixed with set screws are sleeved on the rotating shaft (32); the upper blades (33) are located above the lower plate (8), and the lower blades (35) are located below the lower plate (8); after the rotating shaft rotates, the upper blades (33) stir the liquid to flow upward, and the lower blades (35) stir the liquid to flow downward; The heating mechanism (6) includes a terminal (61), a heating tube (62), insulating refractory material (63), and a heating element (64); the heating tubes (62) are evenly distributed around the rotating shaft (32) and are fixedly connected to the upper plate (4) and the lower plate (8), a heating element (64) is arranged in the heating tube (62), and the heating element (64) is fixed by the insulating refractory material (63) in the heating tube (62), insulated from the heating tube (62), and connected to the terminal (61) on the upper surface of the upper plate (4) through a wire; The outer surface of the tank body is wrapped with a heat-insulating layer, and the upper surface of the upper plate (4) is covered with a heat-insulating layer.

2. The reaction tank of an aqueous water-soluble fertilizer according to claim 1, characterized in that: The cross-section of the tank body is oval, and the stirring and heating device is arranged at the two foci of the ellipse; the cross-section of the tank body is circular, and the stirring and heating device is arranged at the center of the circle.

3. The reaction tank of an aqueous water-soluble fertilizer according to claim 2, characterized in that: An inner wall thermocouple (21) is arranged on the inner wall of the tank body far from the heating mechanism (6); a central thermocouple (22) is arranged on the near side of the heating tube (62).

4. The reaction tank of an aqueous water-soluble fertilizer according to claim 1, characterized in that: A flip cover (5) covers the feeding port of the tank body.

5. The reaction tank of an aqueous water-soluble fertilizer according to claim 4, characterized in that: The flip cover (5) is rotatably connected to the upper plate (4) or is matched with the groove of the top plate.

6. The reaction tank of an aqueous water-soluble fertilizer according to claim 1, characterized in that: The bottom of the tank body is spherical or arc-shaped.

7. The reaction tank of an aqueous water-soluble fertilizer according to claim 6, characterized in that: An outlet (10) or a cleaning port (11) is arranged at the lowest point of the tank body.

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