Filter press pressing device for glycine filter pressing

Abstract

The utility model discloses a press filter pressing device for glycine filter pressing, which relates to the field of industrial production equipment and comprises a base plate, a hydraulic cylinder, an elastic compensation unit, a bottom plate and a pressing plate. The base plate is rigidly connected with the fixed end of the hydraulic cylinder, the output end of the hydraulic cylinder is connected with the bottom plate through the rigid coupling, and the bottom plate is of a disc-shaped structure and is dynamically connected and matched with the pressing plate through the elastic compensation units distributed in the circumferential direction; a composite sealing structure is arranged on the outer edge of the pressing plate. Aiming at the problems of filtrate leakage, short service life of a sealing assembly, too high energy consumption and the like caused by non-uniform pressure distribution of a traditional pressing device, the device realizes dynamic pressure balance through the synergistic effect of a circumferential elastic compensation unit and a pressure sensing system, and a composite sealing structure is adopted to adaptively fill a microscopic gap.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of industrial production equipment, in particular to a filter press compaction device for glycine filter pressing. BACKGROUND

[0002] In the industrial production of glycine, the filter press compaction device as the core equipment for solid-liquid separation directly affects the product quality and production efficiency. The existing filter press compaction technology generally adopts a hydraulic or mechanical rigid compaction structure, which applies a one-way linear pressure to the filter plate group through a hydraulic cylinder driven piston, and relies on the combination of a metal pressing plate and a rubber sealing ring to realize filter chamber sealing. Such design has certain universality in traditional chemical industry, for example, in mineral processing or sewage treatment, it can meet the basic pressure demand and sealing requirement. However, when facing the special working conditions of high purity, high corrosion and crystal sensitivity of glycine production, the limitations of traditional compaction devices are gradually exposed.

[0003] The main shortcomings of the prior art are due to the adaptability defects of its structure and materials. First, the rigid compaction system cannot dynamically compensate the deformation of the filter plate group under long-term high pressure, resulting in a non-uniform pressure distribution with "high center and low edge". The glycine crystal particle size is small and the filter cake structure is loose, so the edge pressure attenuation will cause mother liquor side leakage, not only causing waste of raw materials, but also causing product conductivity to exceed the standard due to the residual sodium chloride and other impurities, which cannot meet the pharmaceutical grade purity requirements. Second, the traditional rubber sealing ring is prone to swelling and aging in the alternating acid and alkali environment of glycine mother liquor, and the hydraulic system needs to continuously apply high pressure to maintain sealing, which further accelerates the sealing failure, forming a vicious cycle of "pressure compensation dependence". The essence of these defects lies in that the existing technology has not been optimized for the material characteristics of glycine: the rigid compaction structure lacks flexibility adjustment ability, the sealing material cannot balance corrosion resistance and elasticity, and the drive system does not realize energy efficiency grading control according to the characteristics of the filter pressing stage. The above technical shortcomings directly lead to rising production costs and product quality fluctuations. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to at least overcome one of the shortcomings of the prior art, and to provide a filter press compaction device for glycine filter pressing.

[0005] To achieve the above-mentioned purpose, the present application discloses a filter press compaction device for glycine filter pressing, which comprises a base plate, a hydraulic cylinder, an elastic compensation unit, a bottom plate and a pressing plate.

[0006] The base plate is rigidly connected with the fixed end of the hydraulic cylinder, the output end of the hydraulic cylinder is connected with the bottom plate through a rigid coupling, and the bottom plate is in a disc-shaped structure and is dynamically connected and matched with the pressing plate through the circumferentially distributed elastic compensation unit;

[0007] The outer edge of the pressing plate is provided with a composite sealing structure.

[0008] Further, the back of the bottom plate is processed with radial reinforcing ribs, and the height of the ribs is 1.2 times of the thickness of the plate.

[0009] Further, the elastic compensation unit is composed of a disc spring group and a pneumatic capsule in series. The pneumatic capsule is a multi-layer flexible composite structure, the outer layer is a wear-resistant polyurethane coating, and the internal cavity is connected with the pressure controller through an independent air path. The expansion direction of the capsule is consistent with the extension direction of the hydraulic tank.

[0010] Further, a plurality of pressure sensors are embedded in the working surface of the pressure plate in a matrix form. The pressure sensors adopt a fully sealed packaging structure and are coated with a corrosion-resistant film layer on the surface.

[0011] Further, the pressure sensor array is arranged in a honeycomb hexagonal topology, and each sensing unit corresponds to a region of the pressure plate.

[0012] Further, the composite sealing structure includes a base seal and a dynamic compensation element. The base seal is made of a modified polymer material and is injection molded. It has a trapezoidal groove for installing the dynamic compensation element. The dynamic compensation element is an elastic cavity structure. It is connected with the external air source through a micro-channel and an electrically controlled valve. During the compression process, it generates directional deformation according to the real-time pressure gradient. By controlling the amount of external gas, it can adaptively fill the micro gaps caused by processing tolerances or wear.

[0013] Compared with the prior art, the device can realize dynamic pressure balance through the synergistic effect of the circumferential elastic compensation unit and the pressure sensing system, and can adaptively fill the micro gaps by using the composite sealing structure.

[0014] The above-listed beneficial effects are not exhaustive of all advantages. Other potential beneficial effects and detailed technical implementation methods will be further disclosed in the embodiments or other description parts of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0015] The specific embodiments will be better understood after reading the following detailed description in conjunction with the accompanying drawings, in which the positions, sizes, ranges, and the like of the structures shown in the drawings are sometimes not representative of actual positions, sizes, ranges, and the like. In the drawings:

[0016] Figure 1 is a structural schematic diagram of an embodiment of the present disclosure.

[0017] Figure 2 is a partial structural schematic diagram of a pressure plate in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0018] The present disclosure will be described with reference to the attached drawings, which are presented for the purpose of illustration and description. It is to be understood that the present disclosure can be presented in a multitude of different forms and that the present disclosure is not limited to the embodiments set forth herein and illustrated in the drawings. Rather, the embodiments presented herein are meant to provide a more thorough and complete understanding of the present disclosure and its capabilities and the present disclosure encompasses all alternatives, modifications and equivalents falling within the scope of the present disclosure. Also, it should be understood that the embodiments of the present disclosure, as described herein, can be combined in a variety of ways with one another.

[0019] It is to be understood that like numerals refer to like elements throughout the description. In the drawings, the relative sizes of the various features can be distorted for clarity.

[0020] It is to be understood that the phraseology and terminology used herein is for the purpose of description and not of limitation. All technical and scientific terms used herein are to be interpreted according to their ordinary meaning to one skilled in the art unless otherwise defined. For the purposes of the present disclosure, the singular forms "a", "an" and "the" include plural referents unless the context clearly indicates otherwise. For the purposes of the present disclosure, the terms "includes", "including", "comprises" and "comprising", when used to describe this disclosure, specify the presence of stated features but do not preclude the presence or addition of one or more other features.

[0021] It is to be understood that the phraseology and terminology used herein is for the purpose of description and not of limitation. All technical and scientific terms used herein are to be interpreted according to their ordinary meaning to one skilled in the art unless otherwise defined. For the purposes of the present disclosure, the singular forms "a", "an" and "the" include plural referents unless the context clearly indicates otherwise. For the purposes of the present disclosure, the terms "includes", "including", "comprises" and "comprising", when used to describe this disclosure, specify the presence of stated features but do not preclude the presence or addition of one or more other features.

[0022] Reference will now be made to the drawings, which depict several embodiments of the present disclosure. It is to be understood that the embodiments presented herein are meant to provide a more thorough and complete understanding of the present disclosure and its capabilities and the present disclosure encompasses all alternatives, modifications and equivalents falling within the scope of the present disclosure. Also, it should be understood that the embodiments of the present disclosure, as described herein, can be combined in a variety of ways with one another. Figure 1 And 2 The present embodiment relates to a filter press compaction device for glycine filter pressing, which is composed of a base plate 1, a hydraulic cylinder 2, an elastic compensation unit 3, a bottom plate 4, a pressing plate 5 and other key components. The components are connected and matched in a specific way to realize efficient compaction during glycine filter pressing.

[0023] The base plate 1 is made of high-strength alloy steel and is forged as the basic support structure of the entire device, having excellent load-bearing capacity and anti-deformation performance. It is connected to the fixed end of the hydraulic cylinder 2 through a rigid connection, which ensures that the base plate 1 can stably transmit force during hydraulic driving without displacement or deformation. The hydraulic cylinder 2 is made of high-quality carbon steel and is processed through a fine processing technology to ensure the smoothness and precision of its inner and outer walls, thereby improving the working efficiency and service life of the hydraulic cylinder 2. The output end of the hydraulic cylinder 2 is connected to the bottom plate 4 through a rigid coupling, and the material of the coupling 22 is high-strength alloy steel, which can withstand large torque transmission while ensuring the precise centering and stable connection between the bottom plate 4 and the output end of the hydraulic cylinder 2, allowing the bottom plate 4 to move smoothly in a straight line under the drive of the hydraulic cylinder 2.

[0024] The bottom plate 4 is in a disc-shaped structure and is stamped from thick steel plate and treated through a heat treatment process to improve its hardness and toughness. The back of the bottom plate 4 is processed with radial reinforcing ribs, with the rib height being 1.2 times the plate thickness. This design can effectively enhance the overall rigidity of the bottom plate 4 and prevent deformation due to uneven stress during compression. The outer edge of the bottom plate 4 is connected to the circumferentially distributed elastic compensation unit 3, which is composed of a disc spring group 31 and a pneumatic capsule 32 in series.

[0025] More specifically, the pneumatic capsule 32 is a multi-layer flexible composite structure, with a wear-resistant polyurethane coating on the outer layer, having excellent wear resistance and tensile strength. The internal cavity is connected to the pressure controller through an independent air path, and the capsule expansion direction is consistent with the extension direction of the hydraulic cylinder 2. Therefore, while the hydraulic cylinder 2 drives the movement of the bottom plate 4, the pneumatic capsule 32 expands or contracts to achieve elastic compensation of the pressing plate 5, ensuring close contact between the pressing plate 5 and the bottom plate 4 and improving the compression effect.

[0026] The pressing plate 5, as a key component of the compression device, has a number of pressure sensors 51 embedded on its working surface. These pressure sensors 51 are arranged in a matrix form and are sealed with an anti-corrosion film layer on the surface, effectively preventing the corrosion of corrosive substances such as glycine and ensuring the long-term stable operation of the sensors. The pressure sensor 51 array is arranged in a honeycomb hexagonal topology, with each sensor unit corresponding to a region of the pressing plate 5. This arrangement allows for comprehensive monitoring of the stress on the pressing plate 5, ensuring uniform pressure distribution in each region during compression. The outer edge of the pressing plate 5 is provided with a composite sealing structure 52, which includes a base sealing element 521 and a dynamic compensation element 522.

[0027] The base seal 521 is made of modified polymer material by injection molding, which has good flexibility and chemical corrosion resistance, and is provided with a trapezoidal groove for installing the dynamic compensation element 522. The dynamic compensation element 522 is an elastic cavity structure, which is connected with the electric control valve and the external gas source through the micro channel. During the compression process, the directional deformation is generated according to the real-time pressure gradient, and the micro gap formed by the processing tolerance or wear can be filled adaptively by controlling the intake of the external gas source, so as to ensure the sealing performance between the compression plate 5 and the bottom plate 4, and prevent glycine leakage.

[0028] In actual work process, the hydraulic cylinder 2 is started, the output end of the hydraulic cylinder 21 drives the bottom plate 4 to move to the compression plate 5 through the rigid coupling 22, and the elastic compensation unit 3 between the bottom plate 4 and the compression plate 5 begins to play a role. With the advance of the bottom plate 4, the disc spring group 31 is compressed, and the pneumatic capsule 32 gradually expands under the control of the pressure controller, and an elastic force gradually increasing is applied to the compression plate 5. When the bottom plate 4 and the compression plate 5 approach, the dynamic compensation element 522 in the composite seal structure 52 begins to adaptively deform according to the gap between the two, fills the micro gap, and ensures the sealing effect. At this time, the pressure sensor 51 on the compression plate 5 monitors the pressure change of each region in real time, and feeds back the data to the control system, and the control system adjusts the output pressure of the hydraulic cylinder 21 and the inflation degree of the pneumatic capsule 32 according to the data, and finally realizes the uniform compression of glycine, improves the compression filtration efficiency and quality.

[0029] The disc spring group 31 in the elastic compensation unit 3 adopts a combined installation mode of series and parallel, and can be flexibly configured according to the actual required elastic stroke and elastic force. The processing technology of the disc spring includes cold drawing, quenching, tempering and other heat treatment processes, so as to ensure that it has sufficient elasticity and fatigue resistance. In this embodiment, the surface of the disc spring is subjected to corrosion prevention treatment, and a layer of epoxy resin coating with a thickness of 10 μm is coated, so as to prevent rust in humid and corrosive environment. This surface treatment technology is a common known technology in the spring manufacturing field, but in this embodiment, the environmental characteristics of glycine compression filtration are combined, and the service life of the disc spring is further improved.

[0030] In the multi-layer flexible composite structure of the pneumatic capsule 32, in addition to the wear-resistant polyurethane coating layer on the outer layer, it also includes a reinforcing fiber layer and two airtight layers inside. The reinforcing fiber layer is woven with high-strength aramid fiber, which has excellent tensile and tear resistance, and can effectively withstand the internal pressure of the capsule during inflation and contraction. The airtight layer is made of neoprene rubber material, which has good airtightness and aging resistance. The design principle of this multi-layer composite structure has been studied and applied in the field of inflatable structures, and will not be described and explained in detail.

[0031] In this embodiment, the thickness and performance parameters of each layer of material are optimized and adjusted according to the specific needs of glycine pressure filtration to ensure the reliability and stability of the pneumatic capsule 32 in long-term use.

[0032] The pressure sensor 51 adopts a fully sealed packaging structure, and the sensitive element inside is a piezoresistive pressure chip, which has high precision and high stability. The pressure chip is manufactured by micro-machining technology, which can realize high sensitivity pressure detection in a small size. The packaging shell of the sensor is made of stainless steel, and the surface is polished, which has good corrosion resistance and mechanical strength. The packaging technology of this pressure sensor belongs to mature technology in the field of industrial measurement.

[0033] The elastic cavity structure of the dynamic compensation member 522 is provided with a plurality of micro-channels, which are manufactured by precision machining technology and have uniform diameter and smooth inner wall. The layout and size of the micro-channels are determined according to the simulation analysis of the pressure gradient and gap change that may occur during glycine pressure filtration, to ensure that the dynamic compensation member 522 can realize rapid and uniform deformation response under different working conditions. The electric control valve adopts an electromagnetic proportional valve, which can accurately control the intake of the external air source, and has fast response speed and high control precision. This electromagnetic proportional valve is a known technology in the pneumatic control system, but in this embodiment, combined with the characteristics of the dynamic compensation member 522, the flow characteristics and pressure compensation function of the valve are further optimized to realize accurate filling control of the micro gap.

[0034] In summary, the glycine pressure filter press compression device in this embodiment realizes efficient and stable compression of the glycine pressure filtration process through reasonable structural design, high-quality material selection, and close cooperation between components, and has good application prospects. In the design process, the known technologies and well-known technologies in the related fields are fully used, and the special needs of glycine pressure filtration are optimized and innovated to ensure the reliability and efficiency of the device in practical application.

[0035] Although the exemplary embodiments of the present disclosure have been described, it should be understood by those skilled in the art that various changes and modifications can be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure in essence. Therefore, all changes and modifications are included in the protection scope of the present disclosure defined by the claims. The present disclosure is defined by the additional claims, and the equivalents of these claims are also included.

Claims

1. A filter press compaction device for glycine filter pressing, characterized in that, The base plate, hydraulic cylinder, elastic compensation unit, bottom plate and pressing plate are included. The base plate is rigidly connected with the fixed end of the hydraulic cylinder, the output end of the hydraulic cylinder is connected with the bottom plate through a rigid coupling, the bottom plate is in a disc-shaped structure and is dynamically connected with the pressing plate through the circumferentially distributed elastic compensation unit; The outer edge of the pressing plate is provided with a composite sealing structure; The elastic compensation unit is composed of a disc spring group and a pneumatic capsule in series; the pneumatic capsule is a multi-layer flexible composite structure, the outer layer is a wear-resistant polyurethane coating, the internal cavity is connected with a pressure controller through an independent air path, and the expansion direction of the capsule is consistent with the expansion direction of the hydraulic tank; A plurality of pressure sensors are embedded on the working surface of the pressing plate in a matrix form, the pressure sensors adopt a fully sealed packaging structure and are coated with an anticorrosion film layer on the surface; The composite sealing structure comprises a base sealing element and a dynamic compensation element, the base sealing element is made of a modified polymer material and is injection molded, and has a trapezoidal groove for mounting the dynamic compensation element; the dynamic compensation element is an elastic cavity structure and is connected with an external air source through a micro channel and an electrically controlled valve, and generates directional deformation according to the real-time pressure gradient during the pressing process.

2. A press for glycine press filtration according to claim 1, characterised in that Radiating reinforcing ribs are processed on the back surface of the bottom plate, and the height of the ribs is 1.2 times of the thickness of the plate.

3. A press for glycine press filtration according to claim 1, characterized in that The pressure sensor array is arranged in a honeycomb hexagonal topology, and each sensing unit corresponds to an area of the pressing plate.

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