Urea anti-blocking, crushing and metering integrated system

Abstract

The utility model relates to the technical field of environmental protection equipment, and provides a urea anti-blocking, crushing and metering integrated system which comprises a weighing bin and a urea crusher connected with the weighing bin, the urea crusher is connected with an external dissolving tank, and the weighing bin is of a structure with a wide upper end and a narrow lower end; a feed port is formed in the upper end of the weighing bin, and a discharge port connected with the urea crusher is formed in the lower end of the weighing bin; and an arch breaking mechanism and a vibrating mechanism are arranged at the discharge hole. According to the system, the urea particles can be prevented from blocking the discharge port of the weighing stock bin, the urea particles can smoothly enter the urea pulverizer through the discharge port, powdery urea is prepared, the specific surface area of materials is effectively increased, and therefore the production efficiency of solution preparation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of environmental protection equipment, in particular to a urea anti-blocking, crushing and metering integrated system. Background Art

[0002] In the urea hydrolysis process system, urea solution is the main raw material in the urea hydrolysis process system. The configuration of urea solution will affect the entire urea hydrolysis process system. Therefore, attention should be paid to the blanking problem of the urea silo.

[0003] Generally speaking, urea hydrolysis systems are equipped with a urea storage system, and silos are one method of storage. Since the hydrolysis process requires the use of water vapor to dissolve urea granules, the physical properties of urea granules make them prone to compaction when exposed to moisture, making it difficult to discharge the granules. Therefore, the urea silo should be equipped with appropriate anti-blocking devices at the discharge port.

[0004] CN207956660U discloses a urea granule collection silo, comprising a silo body, within which is disposed a material chute. The material chute comprises a plurality of continuously arranged chute units, each extending obliquely from one side wall of the silo body to the other side wall of the silo body. A hollow discharge port is provided at the bottom of the end of each chute unit, facing the bottom of the starting end of another chute unit. The aforementioned patent document adds a material chute to the silo body, so that after entering the silo body, the urea granules slide along the material chute to the bottom of the silo body. Furthermore, the material chute is composed of multiple chute units, which increases the residence time of the urea granules within the silo body, facilitates cooling of the urea granules, prevents agglomeration of the urea granules, and ensures smooth flow of the material chute. However, the solution of the aforementioned patent document still cannot completely prevent the compaction of urea granules, particularly urea granules that accumulate and adhere to the material chute after long-term use.

[0005] Based on this, the technical problem solved in this case is: how to solve the problem of silo blockage due to urea compaction, which in turn affects the configuration of urea solution. Utility Model Content

[0006] In order to solve the above technical problems, the utility model provides an integrated system for urea anti-blocking, crushing and metering. This system can prevent urea granules from being blocked at the discharge port of the weighing silo, and can enable urea granules to smoothly pass through the discharge port into the urea crusher and prepare powdered urea, effectively increasing the specific surface area of ​​the material, thereby improving the production efficiency of the solution preparation.

[0007] The technical solution of the utility model is:

[0008] A urea anti-blocking, crushing and metering integrated system includes a weighing silo and a urea crusher connected to the weighing silo. The weighing silo has a structure with a wide upper end and a narrow lower end. The upper end of the weighing silo is provided with a feed inlet, and the lower end of the weighing silo is provided with a discharge port connected to the urea crusher. The urea crusher is connected to an external dissolving tank. An arch breaking mechanism and a vibration mechanism are provided at the discharge port.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] The urea crusher of the present invention produces fine urea particles, which can increase the specific surface area, so that the urea particles can achieve good solid-liquid contact with the solution in the external dissolution tank, effectively improving the production efficiency. Of course, during transportation, the arch-breaking mechanism and the vibration mechanism on the weighing silo enable the system of the present invention to prevent the fine urea particles from re-agglomerating due to water vapor condensation, which not only prevents the urea particles from clogging the discharge port of the weighing silo, but also ensures that the particle size of the urea particles is uniform and fine, and avoids the problem of urea particles adhering to the outer wall of the weighing silo, causing a decrease in configuration accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a working schematic diagram of Example 1 of the present utility model;

[0012] Figure 2 This is a schematic diagram of the silo structure of Example 1 of the present utility model.

[0013] The corresponding relationship between the numbers in the figure is as follows:

[0014] Urea crusher 1; silo 2; arch breaking mechanism 21; drive module 211; screw shaft 212; blade 213; vibration mechanism 22; vibrator 221; feed port 201; discharge port 202; valve 203; weight sensor 204; heating coil 205. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0016] Example 1

[0017] refer to Figure 1 、 2A urea anti-blocking, crushing, and metering integrated system includes a weighing silo 2 and a urea crusher 1 connected to the weighing silo 2 for crushing urea granules with a diameter of 0.3 to 0.5 cm into powdered urea; the urea crusher 1 is connected to an external dissolving tank; the weighing silo 2 has a structure with a wide upper end and a narrow lower end; a feed port 201 is provided at the upper end of the weighing silo 2, and a discharge port 202 connected to the urea crusher is provided at the lower end of the weighing silo; an arch breaking mechanism 21 and a vibration mechanism 22 are provided at the discharge port.

[0018] The urea granule conveying and crushing process of this embodiment is as follows: urea granules with a diameter of 0.3 to 0.5 cm are put into the weighing silo 2 through the feed port 201 at the upper end of the weighing silo 2. Since the weighing silo 2 has a wide upper end and a narrow lower end, the urea granules are naturally weighed and fall to the discharge port 202 at the lower end of the weighing silo 2. Under the action of the arch breaking mechanism 21 and the vibration mechanism 22, the powdered urea at the discharge port 202 will be stirred and vibrated to prevent the powdered urea from adhering to the outer wall of the weighing silo 2. Then, the urea granules are put into the urea crusher 1 as needed for crushing to obtain powdered urea, and finally enter the external dissolution tank.

[0019] It should be noted that the urea grinder 1 of this embodiment is a horizontal grinder. Those skilled in the art may replace it with a vertical grinder according to actual conditions, which should also fall within the protection scope of this embodiment.

[0020] In this embodiment, fine urea granules are prepared by the urea crusher 1, thereby increasing the specific surface area of ​​the urea granules, and further achieving good solid-liquid contact between the urea granules and the solution in the external dissolution tank, thereby effectively improving production efficiency. Of course, during transportation, the arch-breaking mechanism 21 and the vibration mechanism 22 on the weighing silo 2 enable the system to prevent the fine urea granules from re-agglomerating due to water vapor condensation, which not only prevents the urea granules from clogging the discharge port 202 of the weighing silo 2, but also ensures that the particle size of the urea granules is uniform and fine, and avoids the problem of urea granules adhering to the outer wall of the weighing silo 2, causing a decrease in configuration accuracy.

[0021] Specifically, the lower end of the weighing silo 2 is a conical structure, and the bottom surface is open to serve as a discharge port 202. Under this design, the powdered urea can fall naturally under the weight. In this embodiment, preferably, the inclination angle of the weighing silo 2 is 120°.

[0022] More specifically, the discharge port 202 is connected to a pipe from the urea grinder 1, and a valve 203 is installed on the pipe. Furthermore, the weighing silo 2 is fixed to a bracket and has four contact points with the bracket, each equipped with a weight sensor 204. This advantage lies in the symmetrical layout of the four weight sensors 204, which provides a more even load distribution, reducing errors caused by local pressure fluctuations on a single weight sensor 204, thereby improving weighing accuracy. With this design, powdered urea can be regularly and quantitatively injected into the external dissolution tank.

[0023] In addition, specifically, the arch-breaking mechanism 21 in this embodiment includes a drive module 211 disposed outside the weighing silo 2, a screw shaft 212 disposed inside the weighing silo 2, and blades 213 disposed on the screw shaft 212; the screw shaft 212 is horizontally disposed at the discharge port 202; the screw shaft 212 is horizontally disposed at the discharge port 202; the drive module 211 is in transmission connection with the screw shaft 212 and is used to drive the screw shaft 212 to rotate. Under this design, the drive module 211 drives the screw shaft 212 to rotate, thereby driving the blades 213 on the screw shaft 212 to rotate and stir the surrounding urea particles, thereby preventing the urea from agglomerating or even clogging the discharge port 202.

[0024] More specifically, the vibration mechanism 22 includes four vibrators 221 arranged on the outer wall of the weighing silo 2; preferably, the four vibrators 221 are evenly arranged along the outer wall of the weighing silo 2; under the above preference, the four vibrators 221 can prevent powdered urea from adhering to the outer wall of the weighing silo 2 in all directions; further preferably, the vibrator 221 is an electromagnetic vibrator 221, which has the advantages that: the electromagnetic vibrator 221 can start and stop quickly, has a short response time, and can adjust the vibration frequency and amplitude as needed to adapt to different working conditions and material properties.

[0025] In actual application, preferably, the outer wall of the weighing silo 2 is wrapped with a heating coil 205; the heating coil 205 is used to heat the urea granules in the weighing silo 2, so as to further prevent the urea granules from becoming hardened due to water vapor. Further preferably, the heating medium in the heating coil 205 is condensed water in the urea hydrolysis to produce ammonia. It should be noted that the condensed water in this embodiment refers to the steam that provides heat in the urea hydrolysis process and is collected in the drain tank after being utilized. The temperature of this condensed water is generally between 90°C and 95°C. The use of condensed water heating can improve the energy utilization rate of the system and significantly improve the environmental protection factor of the system.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements or modifications can be made without departing from the principles of the present invention. These improvements or modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A urea anti-blocking, crushing, and metering integrated system, comprising a weighing silo and a urea crusher connected to the weighing silo, wherein the urea crusher is connected to an external dissolving tank, characterized in that: The weighing silo is a structure with a wide upper end and a narrow lower end; a feed port is provided at the upper end of the weighing silo, and a discharge port connected to the urea crusher is provided at the lower end of the weighing silo; an arch breaking mechanism and a vibration mechanism are provided at the discharge port.

2. The urea anti-blocking, crushing and metering integrated system according to claim 1 is characterized in that: The lower end of the weighing silo is a conical structure, and the bottom surface is an open side to serve as the discharge port.

3. The urea anti-blocking, crushing and metering integrated system according to claim 1 is characterized in that: The arch-breaking mechanism includes a driving module arranged outside the weighing silo, a screw shaft arranged inside the weighing silo, and blades arranged on the screw shaft; the screw shaft is horizontally arranged at the discharge port; the driving module is transmission-connected to the screw shaft and is used to drive the screw shaft to rotate.

4. The urea anti-blocking, crushing and metering integrated system according to claim 1 is characterized in that: The vibration mechanism includes a plurality of vibrators arranged on the outer wall of the weighing silo.

5. The urea anti-blocking, crushing and metering integrated system according to claim 4 is characterized in that: There are at least four vibrators, which are evenly arranged along the outer wall of the weighing silo.

6. The urea anti-blocking, crushing and metering integrated system according to claim 4 or 5, characterized in that: The vibrator is an electromagnetic vibrator.

7. The urea anti-blocking, crushing and metering integrated system according to claim 2, characterized in that: The discharge port is connected to the urea crusher pipeline and a valve is provided on the pipeline.

8. The urea anti-blocking, crushing and metering integrated system according to claim 1 is characterized in that: The urea grinder is used to grind urea particles with a diameter of 0.3 to 0.5 cm into powdered urea.

9. The urea anti-blocking, crushing and metering integrated system according to claim 1, characterized in that: The weighing silo is fixed on a bracket, and a weight sensor is provided at the contact point with the bracket.

10. The urea anti-blocking, crushing and metering integrated system according to claim 9, characterized in that: There are at least three weight sensors.

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