Salt product comminution filtration apparatus

Abstract

The application relates to a salt product crushing and filtering device, which comprises a crushing box, a cavity arranged in the crushing box, an opening arranged at the lower end of the crushing box, and a salt crushing operation in the cavity; a gas feeding device, an output end of the gas feeding device being communicated with the cavity, and high-pressure gas flow being fed to the cavity; and a vibrating screen arranged below the crushing box and corresponding to the opening position; wherein the high-pressure gas flow fed by the gas feeding device is dry cold gas flow; compared with the prior art, the crushing does not need mechanical moving parts, metal pollution is avoided, and the dry cold gas flow is used to keep the salt dry and low-temperature, so that the quality is not damaged.

Description

Technical Field

[0001] This invention relates to the field of salt production technology, and more specifically, to a salt product crushing and filtering device. Background Technology

[0002] In the salt chemical and food processing industries, the crushing and screening of salt products are crucial steps affecting finished product quality and production efficiency. Due to their hygroscopic and agglomerating properties, salt materials often exhibit adhesion, clumping, and equipment blockage during the crushing process. This not only reduces crushing efficiency but also affects screening results and the uniformity of the final product. Traditional salt crushing equipment typically employs mechanical grinding, impact, or shearing methods for crushing, followed by grading using vibrating screens. However, the heat generated during mechanical crushing, coupled with the strong hygroscopic nature of salt, easily leads to localized temperature rises and moisture release. This causes salt particles to re-agglomerate, even adhering to the screen surface, resulting in screen blockage and severely impacting the stability of continuous production and the consistency of product particle size.

[0003] While commonly used integrated crushing and screening devices have achieved continuous operation of crushing and screening to some extent, they still have many limitations. For example, some devices have a fixed screen directly installed at the bottom of the crushing chamber, relying on the gravity of the material and the wind force generated by the rotation of the crusher to achieve preliminary screening. However, fine particles easily accumulate on the screen surface, and if not cleaned in time, the screening efficiency will drop sharply. Other systems use external circulating fans to guide airflow for auxiliary conveying and cooling, but the air is generally not dehumidified, and when it comes into contact with salt powder, it exacerbates moisture absorption and agglomeration, especially in high humidity environments. In addition, mechanical vibrating screens are prone to reduced amplitude due to salt powder adhesion during long-term operation, shortening the screen life and requiring frequent shutdowns for cleaning or replacement, which seriously affects equipment utilization and production economy.

[0004] On the other hand, existing technologies attempt to introduce airflow-assisted crushing and material conveying methods, such as using airflow energy to accelerate and crush materials through collision or using pneumatic conveying to carry crushed materials out of the crushing zone. However, these conventional airflow-assisted methods often neglect the control of airflow temperature and humidity, failing to fundamentally solve the problem of changes in the physical properties of salt materials caused by thermal melting or moisture absorption. Especially in the production of high-requirement food salt and fine chemical salt, the moisture content and particle distribution of the finished salt have strict standards, which traditional processes find difficult to consistently meet.

[0005] Therefore, there is an urgent need to develop a high-efficiency crushing and filtering device that can effectively suppress the moisture absorption and thermal agglomeration of salt products during the crushing process, achieve stable operation in low temperature and low humidity environments, improve crushing efficiency and screening accuracy, and at the same time reduce equipment maintenance frequency and energy consumption, so as to meet the dual requirements of modern salt product processing industry for product quality and production process reliability. Utility Model Content

[0006] The main objective of this invention is to provide a salt product crushing and filtering device that can produce high-quality, small-particle fine salt.

[0007] To solve the above-mentioned technical problems, the present invention proposes a salt product crushing and filtering device, comprising: a crushing box having a cavity inside and an opening at its lower end, wherein the salt is crushed inside the cavity; an air supply device having its output end connected to the cavity to supply high-pressure airflow to the cavity; and a vibrating screen disposed below the crushing box, corresponding to the opening position; wherein the high-pressure airflow supplied by the air supply device is a dry and cold airflow.

[0008] In the above technical solution, the air supply device further includes: a compressor for outputting high-pressure airflow; a dry cooler, the input end of which is connected to the output end of the compressor, and the output end of the dry cooler is connected to one end of the air supply pipe; an air supply pipe, one end of which is connected to the dry cooler and the other end of which is connected to the cavity, and an inlet is provided on the air supply pipe; and an inlet pipe, one end of which is connected to the inlet.

[0009] In any of the above technical solutions, the pulverizing box is further divided into an upper box and a lower box, both of which are bowl-shaped, and the larger cross-section ends of the two are interlocked to form a cavity.

[0010] In any of the above technical solutions, the vibrating screen further includes: a screen frame, which is disposed below the crushing box and corresponds to the opening position; a screen mesh, which is disposed at one end of the screen frame near the crushing box; and a vibrator, which is disposed on the screen frame.

[0011] In any of the above technical solutions, the vibrator further includes: a rotating shaft rotatably mounted on the screen frame; an eccentric wheel fixedly mounted on the rotating shaft; and a motor for driving the rotating shaft to rotate.

[0012] In any of the above technical solutions, a pulley is further provided on the motor output shaft and the rotating shaft, and the connection is made by belt drive.

[0013] In any of the above technical solutions, a further provision is made on the screen frame, which is located between the screen and the vibrator to accommodate the salt passing through the screen.

[0014] In any of the above technical solutions, further, a baffle is provided at the upper end of the screen frame around the outer circumference of the screen mesh, and its inner diameter is larger than the diameter of the opening.

[0015] Beneficial effects: Compared with existing technologies, the pulverizing process eliminates the need for mechanical moving parts, avoids metal contamination, and uses dry, cold airflow to keep the salt dry and at low temperatures to prevent quality damage. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the cross-section of the present invention; Figure 3 This is a schematic diagram of the structure of the vibrator of the present invention.

[0018] The annotations in the attached figures are explained as follows: 1. Crushing box; 11. Upper box body; 12. Lower box body; 2. Air supply device; 21. Compressor; 22. Dry cooler; 23. Air supply pipe; 24. Feed inlet; 3. Vibrating screen; 31. Screen frame; 311. Feeding tray; 32. Screen mesh; 33. Vibrator; 331. Rotating shaft; 332. Eccentric wheel; 333. Motor; 334. Pulley Detailed Implementation

[0019] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely a part of the embodiments of this application, and not all of the embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without inventive effort are within the scope of protection of this invention.

[0020] It should be noted that, as shown in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" do not specifically refer to the singular and may also include the plural. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, and these steps and elements do not constitute an exclusive list; the method or apparatus may also include other steps or elements.

[0021] If the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0022] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0024] This invention proposes a salt product pulverizing and filtering device.

[0025] The salt product crushing and filtering device of this application will be described in detail below through the following embodiments.

[0026] Example 1: like Figure 1 As shown in the figure, this embodiment proposes a salt product crushing and filtering device, including: a crushing box 1, which has a cavity inside and an opening at its lower end, and the salt is crushed in the cavity; an air supply device 2, whose output end is connected to the cavity and supplies high-pressure airflow to the cavity; and a vibrating screen 3, which is set below the crushing box 1 and corresponds to the opening position; wherein, the high-pressure airflow supplied by the air supply device 2 is a dry and cold airflow.

[0027] The air supply device 2 continuously delivers high-pressure dry and cold airflow into the cavity, causing the salt in the cavity to collide and rub against each other, so as to crush the salt blocks evenly and with high quality until the salt reaches the preset diameter and falls through the vibrating screen 3 and leaves the cavity. The salt that does not meet the requirements continues to be crushed in the cavity.

[0028] Example 2: This embodiment is a further improvement based on Embodiment 1.

[0029] like Figure 1 As shown, in this embodiment, the air supply device 2 includes: a compressor 21 for outputting high-pressure airflow; a dry cooler 22, the input end of which is connected to the output end of the compressor 21, and the output end of the dry cooler 22 is connected to one end of the air supply pipe 23; the air supply pipe 23, one end of which is connected to the dry cooler 22, and the other end of which is connected to the cavity, and the air supply pipe 23 is provided with a feed inlet 24; and a feed pipe, one end of which is connected to the feed inlet 24.

[0030] The dry cooler 22 includes a heat exchanger, an evaporator, and a gas-liquid separator. The high-pressure, humid, and hot airflow output from the compressor 21 first passes through the heat exchanger for preliminary cooling. The cooled airflow then passes through the evaporator for further cooling, becoming a low-temperature, low-humidity airflow and condensate. After passing through the gas-liquid separator, a low-temperature, low-humidity environment is maintained inside the cavity, thus keeping the salt dry and at a low temperature. This avoids the slight dissolution of the salt particles on the surface and subsequent re-agglomeration caused by local temperature rise, thereby inhibiting the agglomeration phenomenon from the source and ensuring the pulverization effect.

[0031] A feed inlet 24 is provided on the air supply pipe 23 between the dry cooler 22 and the cavity, allowing direct feeding during operation. Driven by the unidirectional high-pressure airflow, the added salt will move into the cavity and will not flow back into the dry cooler 22. The end of the air supply pipe 23 connected to the cavity at the same position as the feed pipe is lower than the other end, so that even if the compressor 21 is not in operation and feeding is performed, the salt will still enter the cavity under gravity and will not flow back into the dry cooler 22.

[0032] Example 3: This embodiment is a further improvement based on any of the above embodiments.

[0033] like Figure 2 As shown, in this embodiment, the pulverizing box 1 is divided into an upper box body 11 and a lower box body 12, both of which are bowl-shaped, and the larger cross-section ends of the two are interlocked to form a cavity.

[0034] The disc-shaped cavity formed by the combination of the upper box 11 and the lower box 12 allows the high-pressure airflow to form a circumferential rotating airflow in the cavity when it is not input into the cavity in the radial direction of the crushing box 1. This causes the salt in the cavity to rotate and collide with each other in the circumferential direction, and the fine salt particles can fall into the bottom opening along the inner wall of the crushing box 1 under the action of gravity and enter the vibrating screen 3.

[0035] Example 4: This embodiment is a further improvement based on any of the above embodiments.

[0036] like Figure 2As shown, in this embodiment, the vibrating screen 3 includes: a screen frame 31, which is disposed below the crushing box 1 and corresponds to the opening position; a screen 32, which is disposed at one end of the screen frame 31 near the crushing box 1; and a vibrator 33, which is disposed on the screen frame 31. A feed tray 311 is also disposed on the screen frame 31, positioned between the screen 32 and the vibrator 33, for accommodating salt passing through the screen 32. A baffle wall is provided around the outer circumference of the screen 32 at the upper end of the screen frame 31, and its inner diameter is larger than the diameter of the opening.

[0037] The salt particles crushed in the crushing box 1 fall onto the screen 32 supported by the screen frame 31. Under the continuous vibration of the vibrator 33, the salt particles falling on the screen 32 are continuously screened, so that salt particles of the required size pass through the screen 32 and fall into the feed tray 311. The bottom surface of the feed tray 311 is set with an incline, and an opening is set at the lowest point of the incline. Under the action of gravity, the screened fine salt will leak out from the opening on the bottom surface of the feed tray 311 and enter the next production process. The baffle set at the upper end of the screen frame 31 can prevent the salt from falling vertically due to the airflow in the crushing box and splashing out of the vibrating screen 3.

[0038] Example 5: This embodiment is a further improvement based on any of the above embodiments.

[0039] like Figure 3 As shown, in this embodiment, the vibrator 33 includes: a rotating shaft 331, rotatably mounted on the screen frame 31; an eccentric wheel 332, fixedly mounted on the rotating shaft 331; and a motor 333 for driving the rotating shaft 331 to rotate. A pulley 334 is provided on the output shaft of the motor 333 and the rotating shaft 331, and they are connected by belt drive.

[0040] The vibrating screen 3 employs circular vibration, driven by a motor 333 to rotate a shaft 331. The shaft 331 then drives an eccentric wheel 332 fixed to it. The rotating eccentric wheel 332 generates a unidirectional, continuously rotating centrifugal force, causing the entire vibrating screen 3 to vibrate longitudinally in a circular motion relative to the crushing box 1. The core advantage of circular vibration lies in its efficient multi-dimensional composite motion mode. The circular motion trajectory generates strong vertical acceleration, which throws the material into the air, allowing it to fully disperse and re-layer in the air, greatly increasing the contact opportunity between fine particles and the screen openings, thus significantly improving screening efficiency. Simultaneously, the throwing and falling of the material creates a continuous impact on the screen 32, producing a self-cleaning effect. This effectively dislodges particles stuck in the screen openings, a crucial characteristic for handling easily deliquescent and easily adherent salts, effectively reducing downtime for cleaning and ensuring continuous production.

[0041] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A salt product pulverizing and filtering device, characterized in that, include: A crushing box (1) is provided with a cavity inside and an opening at its lower end, in which salt is crushed. The air supply device (2) has its output end connected to the cavity and supplies high-pressure airflow to the cavity; A vibrating screen (3) is located below the crushing box (1) and corresponds to the opening position; The high-pressure airflow delivered by the air delivery device (2) is a dry and cold airflow.

2. The salt product pulverizing and filtering device according to claim 1, characterized in that, The air supply device (2) includes: Compressor (21), used to output high-pressure airflow; A dry cooler (22) has its input end connected to the output end of the compressor (21); An air supply pipe (23) is connected at one end to the dry cooler (22) and at the other end to the cavity. An inlet (24) is provided on the air supply pipe (23). The feed pipe is connected at one end to the feed port (24).

3. The salt product pulverizing and filtering device according to claim 1, characterized in that, The crushing box (1) is divided into an upper box body (11) and a lower box body (12), both of which are bowl-shaped. The larger cross-section ends of the two are fastened together to form the cavity.

4. The salt product pulverizing and filtering device according to claim 1, characterized in that, The vibrating screen (3) includes: A sieve frame (31) is disposed below the crushing box (1) and corresponds to the opening position; A screen (32) is disposed on the screen frame (31) near the end of the crushing box (1); A vibrator (33) is mounted on the screen frame (31).

5. The salt product pulverizing and filtering device according to claim 4, characterized in that, The vibrator (33) includes: A rotating shaft (331) is rotatably mounted on the screen frame (31); An eccentric wheel (332) is fixedly mounted on the rotating shaft (331); A motor (333) is used to drive the rotating shaft (331) to rotate.

6. The salt product pulverizing and filtering device according to claim 5, characterized in that, The output shaft of the motor (333) and the rotating shaft (331) are provided with pulleys (334) and are connected by belt drive.

7. The salt product pulverizing and filtering device according to claim 4, characterized in that, The screen frame (31) is also provided with a feeding tray (311), which is located between the screen (32) and the vibrator (33) to hold the salt that passes through the screen (32).

8. The salt product pulverizing and filtering device according to claim 4, characterized in that, The upper end of the sieve frame (31) is provided with a baffle wall around the outer circumference of the sieve mesh (32), and its inner diameter is larger than the diameter of the opening.

Images