A multi-stage filtration mechanism for the purification of ammonium bifluoride

Abstract

This invention belongs to the field of ammonium bifluoride purification technology, and specifically relates to a multi-stage filtration mechanism for ammonium bifluoride purification. The mechanism includes a tank with protective components on its outer surface, a discharge port at the bottom, a feed port on one side of the top, a motor in the center of the top, a rotating shaft at the motor's output end, a centrifugal drum at the bottom of the shaft, a flow guide platform below the centrifugal drum, and a bag filter at the bottom of the flow guide platform. This invention, through the cooperation of the motor, centrifugal drum, flow guide platform, bag filter, and activated carbon adsorption plate, enables the filtration mechanism to perform multi-stage filtration, avoiding the problem of poor impurity separation when filtration and purification of ammonium bifluoride in the liquid phase. Furthermore, the cooperation of the protective frame, rubber damping plate, rotating rod, and pressure relief cylinder prevents the surface of the device from easily denting or cracking after external impact.

Description

Technical Field

[0001] This utility model relates to the field of ammonium bifluoride purification technology, specifically a multi-stage filtration mechanism for ammonium bifluoride purification. Background Technology

[0002] Ammonium bifluoride is a white or colorless transparent orthorhombic crystal, flaky in shape, with a slightly acidic odor. It has a melting point of 125.6℃ and a boiling point of 240℃. It is hygroscopic in air, slightly soluble in alcohol, and readily soluble in cold water. It decomposes in hot water, and its aqueous solution is strongly acidic, toxic, and highly corrosive. It can be used as a sample digestion reagent and as a surface treatment agent, etching agent, disinfectant, and preservative in the high-precision electronics and pharmaceutical industries. High-purity ammonium bifluoride, due to its superior digestion ability, extremely short digestion time, extremely low background, non-fluoride precipitation, and superior operational safety compared to hydrofluoric acid, has become a novel sample digestion reagent. It can significantly shorten sample digestion time and improve sample pretreatment efficiency. Currently, when ammonium bifluoride is in the liquid phase, it requires purification using a filtration system.

[0003] The existing technology has the following problems:

[0004] 1. Most existing filtration devices for ammonium bifluoride purification adopt a single-stage filtration structure and do not have the function of multi-stage filtration. This also leads to problems with product purity due to poor impurity separation when the device filters and purifies ammonium bifluoride in the liquid phase, which fails to meet the usage requirements.

[0005] 2. The existing filtration mechanisms for ammonium bifluoride purification do not have particularly ideal protective performance. This makes the surface of the device prone to dents or cracks after being subjected to external impacts, reducing the service life of the device and hindering its widespread adoption. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a multi-stage filtration mechanism for ammonium bifluoride purification. This solves the problem that current devices lack multi-stage filtration capabilities, which leads to poor impurity separation during the filtration and purification of ammonium bifluoride in the liquid phase, affecting product purity. Furthermore, the device's protective performance is not ideal, making its surface prone to dents or cracks after external impacts.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a multi-stage filtration mechanism for ammonium bifluoride purification, comprising a tank, a protective component on the outer surface of the tank, a discharge port at the bottom of the tank, a feed port on one side of the top of the tank, a motor in the middle of the top of the tank, a rotating shaft at the output end of the motor, a centrifugal drum at the bottom end of the rotating shaft, a flow guide platform below the centrifugal drum in the tank, a bag filter at the bottom of the flow guide platform, a support plate on one side of the outer surface of the bag filter, and an activated carbon adsorption plate below the bag filter in the tank.

[0008] As a preferred technical solution of this utility model, the protective component includes a protective frame, a rubber damping plate is provided in the middle of one side of the protective frame, telescopic rods are provided at both ends of the protective frame located on the rubber damping plate, a bearing seat is provided at the bottom of the inner side of the protective frame, a rotating rod is provided at the top of the bearing seat, and a stress relief cylinder is provided in the middle of the outer surface of the rotating rod.

[0009] As a preferred embodiment of this utility model, the rubber damping plate is installed on the protective frame by adhesive bonding, and the size of the rubber damping plate is adapted to the size of the protective frame.

[0010] In a preferred embodiment of this utility model, the rotating rod is mounted on the bearing seat via a rotatable connection. The rotating rod and the unloading cylinder are integrated into one unit. There are several groups of unloading cylinders, which are arranged in a circular array.

[0011] As a preferred embodiment of this utility model, the top end of the rotating shaft is fixedly connected to a motor, and the bottom end of the rotating shaft passes through the tank and is fixedly connected to the centrifugal drum. The position of the centrifugal drum corresponds to the position of the feed inlet.

[0012] As a preferred technical solution of this utility model, the bag filter is specifically composed of three sets of filter bags, the precision of the three sets of filter bags is progressively increased, and the filter bags are specifically made of PTFE-coated polypropylene or glass fiber material.

[0013] As a preferred technical solution of this utility model, the activated carbon adsorption plate is fixedly installed on the tank body, and the position of the activated carbon adsorption plate corresponds to the position of the bag filter. The activated carbon adsorption plate is specifically made of coconut shell carbon or acid-washed coal carbon.

[0014] Compared with the prior art, this utility model provides a multi-stage filtration mechanism for the purification of ammonium bifluoride, which has the following beneficial effects:

[0015] 1. This multi-stage filtration mechanism for ammonium bifluoride purification comprises a motor, a centrifugal drum, a flow guide platform, a bag filter, and an activated carbon adsorption plate. During filtration, liquid ammonium bifluoride is first added to the centrifugal drum through the inlet. The motor drives the shaft to rotate the centrifugal drum at high speed, using centrifugal force to separate and remove large particulate impurities from the liquid. The pre-filtered liquid then enters the bag filter via the flow guide platform. This filter employs a three-stage progressive filtration design, with progressively increasing filter bag precision, effectively intercepting small particles of different sizes. Subsequently, the liquid after secondary filtration flows through the activated carbon adsorption plate, which uses coconut shell charcoal or acid-washed coal charcoal as the adsorption medium to further purify the liquid. Through the three-stage treatment process of centrifugal filtration, bag filtration, and activated carbon adsorption, the filtration and purification effect of the ammonium bifluoride liquid is ensured. This design enables the filtration mechanism to have multi-stage filtration capabilities, avoiding the problem of poor impurity separation when filtering and purifying liquid ammonium bifluoride, thus meeting the usage requirements.

[0016] 2. This multi-stage filtration mechanism for ammonium bifluoride purification, by setting up a protective frame, a rubber damping plate, a rotating rod, and a stress-relieving cylinder, allows the impacting object to directly contact the stress-relieving cylinder on the outer surface of the rotating rod when subjected to external impact. The rotation of the stress-relieving cylinder when in contact with the impacting object reduces the impact force and prevents damage to the tank. Then, the protective frame compresses the rubber damping plate, and the deformation of the rubber damping plate under compression provides a buffering effect, weakening and mitigating the impact force, thereby improving the protective performance of the filtration mechanism. This design avoids the problem of easy dents or cracks on the surface of the device after being subjected to external impact, increases the service life of the device, and facilitates its widespread adoption. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a cross-sectional structural diagram of the tank body of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the bag filter of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the protective component of this utility model;

[0021] Figure 5 for Figure 4 Enlarged view of the structure at point A in the middle.

[0022] In the diagram: 1. Tank body; 2. Protective components; 201. Protective frame; 202. Rubber damping plate; 203. Telescopic rod; 204. Bearing seat; 205. Rotating rod; 206. Unloading cylinder; 3. Discharge port; 4. Inlet port; 5. Motor; 6. Rotating shaft; 7. Centrifugal drum; 8. Guide platform; 9. Bag filter; 10. Support plate; 11. Activated carbon adsorption plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Reference Figure 1 , Figure 2 and Figure 3 This utility model provides an embodiment of a multi-stage filtration mechanism for purifying ammonium bifluoride, comprising a tank 1, a protective component 2 on the outer surface of the tank 1, a discharge port 3 at the bottom of the tank 1, a feed inlet 4 on one side of the top of the tank 1, a motor 5 in the middle of the top of the tank 1, a rotating shaft 6 at the output end of the motor 5, a centrifugal drum 7 at the bottom of the rotating shaft 6, a guide platform 8 below the centrifugal drum 7 in the tank 1, a bag filter 9 at the bottom of the guide platform 8, a support plate 10 on one side of the outer surface of the bag filter 9, and an activated carbon adsorption plate 11 below the bag filter 9 in the tank 1; the top end of the rotating shaft 6 is fixedly connected to the motor 5, and the bottom end of the rotating shaft 6 passes through the tank 1 and is fixedly connected to the centrifugal drum 7, the position of the centrifugal drum 7 corresponding to the position of the feed inlet 4;

[0025] Specifically, during filtration, ammonium bifluoride liquid is added to the centrifugal drum 7 through the feed inlet 4, and then the centrifugal drum 7 is rotated at high speed by the motor 5 driving the rotating shaft 6. The centrifugal force is used to separate and remove large particulate impurities in the liquid, thereby improving the filtration and purification effect of ammonium bifluoride liquid.

[0026] Reference Figure 1 , Figure 4 and Figure 5 The protective component 2 includes a protective frame 201. A rubber damping plate 202 is provided in the middle of one side of the protective frame 201. Telescopic rods 203 are provided at both ends of the protective frame 201 and the rubber damping plate 202. A bearing seat 204 is provided at the bottom of the inner part of the protective frame 201. A rotating rod 205 is provided at the top of the bearing seat 204. A force-relieving cylinder 206 is provided in the middle of the outer surface of the rotating rod 205. The rubber damping plate 202 is installed on the protective frame 201 by adhesive connection. The size of the rubber damping plate 202 is adapted to the size of the protective frame 201.

[0027] Specifically, when subjected to external impact, the rubber damping plate 202 is compressed and deformed, which can play a buffering role, weakening and reducing the impact force, thereby improving the protective performance of the filtration mechanism.

[0028] Reference Figure 1 , Figure 4 and Figure 5 The rotating rod 205 is mounted on the bearing seat 204 via a rotatable connection. The rotating rod 205 and the unloading cylinder 206 are integrated. There are several sets of unloading cylinders 206, which are arranged in a ring array.

[0029] Specifically: When subjected to external impact, the impacting object directly contacts the unloading cylinder 206, and the rotation of the unloading cylinder 206 when in contact with the impacting object reduces the impact force and prevents damage to the tank body 1.

[0030] Reference Figure 2 and Figure 3 The bag filter 9 is composed of three sets of filter bags, with the precision of the three sets of filter bags increasing progressively. The filter bags are made of PTFE-coated polypropylene or glass fiber material.

[0031] Specifically, the bag filter 9 adopts a three-stage progressive filtration design, with the filter bag precision increasing sequentially. This effectively intercepts tiny particles of different sizes, further improving the filtration and purification effect of ammonium bifluoride liquid. At the same time, the bag filter 9 used in this application is a relatively common device that is well known to those skilled in the art. In actual use, commercially available mature products that meet the technical specifications can be selected for adaptation and application.

[0032] Reference Figure 2 The activated carbon adsorption plate 11 is fixedly installed on the tank 1. The position of the activated carbon adsorption plate 11 corresponds to the position of the bag filter 9. The activated carbon adsorption plate 11 is made of coconut shell carbon or acid-washed coal carbon.

[0033] Specifically: In the filtration process, coconut shell charcoal or acid-washed coal charcoal can be used as the adsorption medium to further filter and purify the liquid. Coconut shell charcoal has well-developed pores, strong adsorption capacity for small molecule organic matter and pigments, and low ash content, making it suitable for high purity requirements, but it is more expensive and has weaker mechanical strength; acid-washed coal charcoal has better acid resistance, is suitable for adsorbing large molecule impurities, and has a lower cost. The two can be selected according to the actual situation.

[0034] It should be noted that motor 5 is well known or can be found by those skilled in the art related to this utility model, and therefore will not be described here.

[0035] The working principle and usage process of this utility model are as follows: During filtration, ammonium bifluoride liquid is first added to the centrifugal drum 7 through the feed inlet 4. Then, the motor 5 drives the rotating shaft 6 to rotate the centrifugal drum 7 at high speed, using centrifugal force to separate and remove large particulate impurities in the liquid. The liquid after preliminary filtration enters the bag filter 9 through the guide platform 8. This filter adopts a three-stage progressive filtration design, with the filter bag precision increasing sequentially, which can effectively intercept small particles of different sizes. Subsequently, the liquid after secondary filtration flows through the activated carbon adsorption plate 11. This adsorption plate uses coconut shell carbon or acid-washed coal carbon as the adsorption medium, which can further purify the liquid. Through the three-stage treatment process of centrifugal filtration, bag filtration and activated carbon adsorption, the filtration and purification effect of ammonium bifluoride liquid is ensured.

[0036] When subjected to external impact, the impacting object first comes into direct contact with the stress relief cylinder 206 on the outer surface of the rotating rod 205. The rotation of the stress relief cylinder 206 when in contact with the impacting object reduces the impact force and prevents damage to the tank 1. Then, the protective frame 201 in the protective assembly 2 squeezes the rubber damping plate 202. At the same time, the rubber damping plate 202 is deformed by the compression, which can play a buffering role, weakening and reducing the impact force generated by the impact, thereby improving the protective performance of the filtration mechanism.

[0037] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A multi-stage filtration mechanism for purifying ammonium bifluoride, comprising a tank (1), characterized in that: The outer surface of the tank (1) is provided with a protective component (2), the bottom of the tank (1) is provided with a discharge port (3), the top side of the tank (1) is provided with a feed port (4), the middle of the top of the tank (1) is provided with a motor (5), the output end of the motor (5) is provided with a rotating shaft (6), the bottom end of the rotating shaft (6) is provided with a centrifugal drum (7), the tank (1) is provided with a flow guide platform (8) below the centrifugal drum (7), the bottom of the flow guide platform (8) is provided with a bag filter (9), the outer surface side of the bag filter (9) is provided with a support plate (10), and the tank (1) is provided with an activated carbon adsorption plate (11) below the bag filter (9).

2. The multi-stage filtration mechanism for ammonium bifluoride purification according to claim 1, characterized in that: The protective component (2) includes a protective frame (201), a rubber damping plate (202) is provided in the middle of one side of the protective frame (201), telescopic rods (203) are provided at both ends of the rubber damping plate (202) on the protective frame (201), a bearing seat (204) is provided at the bottom inside the protective frame (201), a rotating rod (205) is provided at the top of the bearing seat (204), and a stress relief cylinder (206) is provided in the middle of the outer surface of the rotating rod (205).

3. The multi-stage filtration mechanism for ammonium bifluoride purification according to claim 2, characterized in that: The rubber damping plate (202) is installed on the protective frame (201) by adhesive bonding, and the size of the rubber damping plate (202) is adapted to the size of the protective frame (201).

4. The multi-stage filtration mechanism for ammonium bifluoride purification according to claim 2, characterized in that: The rotating rod (205) is mounted on the bearing seat (204) by a rotatable connection. The rotating rod (205) and the unloading cylinder (206) are integrated. There are several sets of unloading cylinders (206), and the unloading cylinders (206) are arranged in a ring array.

5. The multi-stage filtration mechanism for ammonium bifluoride purification according to claim 1, characterized in that: The top end of the rotating shaft (6) is fixedly connected to the motor (5), and the bottom end of the rotating shaft (6) passes through the tank body (1) and is fixedly connected to the centrifugal drum (7). The position of the centrifugal drum (7) is set to correspond to the position of the feed inlet (4).

6. The multi-stage filtration mechanism for ammonium bifluoride purification according to claim 1, characterized in that: The bag filter (9) is specifically composed of three sets of filter bags, with the precision of the three sets of filter bags increasing progressively. The filter bags are specifically made of PTFE-coated polypropylene or glass fiber material.

7. The multi-stage filtration mechanism for ammonium bifluoride purification according to claim 1, characterized in that: The activated carbon adsorption plate (11) is fixedly installed on the tank (1). The position of the activated carbon adsorption plate (11) corresponds to the position of the bag filter (9). The activated carbon adsorption plate (11) is made of coconut shell carbon or acid-washed coal carbon.

Images