CN107303481B

CN107303481B - Plastic structured packing

Info

Publication number: CN107303481B
Application number: CN201610254698.9A
Authority: CN
Inventors: 王宝华
Original assignee: Individual
Current assignee: Individual
Priority date: 2016-04-21
Filing date: 2016-04-21
Publication date: 2021-04-27
Anticipated expiration: 2036-04-21
Also published as: CN107303481A

Abstract

The invention relates to a novel plastic structured packing, which aims to overcome the defects of poor wetting property and low mass transfer efficiency of the traditional plastic packing, improve the inherent manufacturing and processing mode, superpose and mix corrugated plate sheets with different thicknesses and plastic wires with different wire diameters to manufacture plastic plate corrugated packing with higher mass transfer efficiency and more precise plastic wire mesh packing, and enhance the water distribution and gas distribution performance of the packing through special treatment on the surface of the corrugated plate. Can be widely applied to the fields of petroleum, chemical industry, biology, pharmacy, environmental protection and the like. The novel plastic structured packing is a plate corrugated sheet with plastic ribs and ribs, which is manufactured by adopting a plastic sheet with a certain thickness; the plastic wires with different wire diameters are adopted to prepare single-layer, double-layer or multi-layer plastic wire mesh sheets with plastic frameworks, the plastic sheet sheets and the wire mesh sheets are further processed into corrugated sheets with different corrugated configurations in a heating mode, and the surfaces of the corrugated sheets are roughened by using a cutting tool.

Description

Plastic structured packing

Technical Field

The invention relates to a novel plastic regular packing, in particular to a novel plastic plate corrugated packing and a novel plastic net corrugated packing, and belongs to the field of gas-liquid mass transfer equipment in a chemical separation process.

Background

In the field of mass transfer and separation engineering, a tower is a very important mass transfer and separation device. The packed tower is used as one kind of tower equipment, has wide application range, covers various fields of petroleum, chemical industry, biology, medicine, environmental protection and the like, and has the advantages of large flux, low pressure drop, high efficiency, energy consumption saving and the like. The filler is used as a core element of the packed tower and plays an extremely important role in mass, energy and momentum transfer between gas and liquid or liquid and liquid. The packing types are classified into regular packing and random packing according to different structures and filling modes. At present, in chemical separation, the structured packing is widely applied, has the advantages of high mass transfer efficiency and good gas-liquid distribution performance, and can almost have no amplification effect through reasonable corrugated structure design.

The regular packing can be divided into corrugated packing, grid packing and pulse packing, wherein the corrugated packing is most widely used and has excellent performance; the corrugated packing is divided into plate corrugated packing and wire mesh corrugated packing. The plate corrugated filler has high strength and strong corrosion resistance, is particularly suitable for large-diameter towers and occasions with large gas-liquid load, and has relatively low manufacturing cost; the silk screen has unique capillary action and good wetting property, the liquid phase is easy to form a film, the silk screen is commonly used in fine chemical engineering, and the separation task of precise rectification can be realized.

At the moment of environmental protection, the packed tower is often used for recovering and treating waste water, waste gas and waste solids, such as: ammonia nitrogen wastewater recovery, ammonia-containing tail gas treatment, particle dust removal and the like. At present, most of the filler is metal or ceramic, which limits the recovery of three wastes. The waste liquid often contains substances with strong acid and alkali, and corrodes metals, so that the metal filler needs to be replaced frequently; the ceramic is fragile and has high resistance, and especially when the system is dirty, the cleaning of the ceramic filler is difficult. The plastic filler has excellent corrosion resistance, light weight and easy assembly and disassembly. The common plastic fillers in the market are all manufactured by rolling plastic sheets, are mostly corrugated, have consistent sheet thickness and cannot effectively promote liquid phase turbulence; even if the wire mesh corrugated packing is manufactured, the used plastic wires have overlarge diameters, so that the porosity of the packing is large, the mass transfer efficiency is low, the separation effect is poor, the film forming property of the surface of the plastic is poor, and the formation and the updating of a liquid film are not facilitated, so that the application range of the plastic packing is limited.

Disclosure of Invention

The invention relates to a novel plastic structured packing, which is in the specific form of plate corrugated and net corrugated plastic structured packing, aims to overcome the defects of poor wetting property and low mass transfer efficiency of the traditional plastic packing, improves the inherent manufacturing and processing mode, superposes and mixes corrugated sheets with different thicknesses and plastic wires with different wire diameters to manufacture plastic plate corrugated packing with higher mass transfer efficiency and more precise plastic wire net packing, and enhances the water distribution and gas distribution performance of the packing through special treatment on the surface of the corrugated sheets.

In order to achieve the purpose, the invention adopts the following technical scheme:

a novel plastic structured packing is specifically divided into a novel plastic plate corrugated structured packing and a novel plastic net corrugated packing.

A novel plastic plate corrugated packing is made of plastic plates with the thickness of 0.1-5 mm, the distance between each plastic rib is determined on each plastic plate, and then the plastic plates between two ribs are stretched to a certain degree, so that the thickness of the stretched plastic plates is thinner than that of the ribs, and the ribs form bulges on the plastic plates. The length of the interval between every two ribs is determined by the specific surface area of the prepared filler, and the stretching degree can be adjusted according to the thickness of the required corrugated sheet.

The utility model provides a novel plastic slab ripple packs, its characterized in that will form the plastic slab roll of muscle and bone and become have the folding groove, form certain ripple structural board ripple piece, can roll into different ripple structures with board ripple piece according to the demand, if: oblique lines, broken lines, arc transition lines and the like.

The novel plastic plate corrugated packing is characterized in that the surface of a plastic corrugated sheet rolled out of a corrugated structure is roughened, so that the wettability of the packing is improved, and the specific mode is as follows: the surfaces of the plastic corrugated sheets are subjected to hooking, rubbing and rubbing to different degrees by using a cutting tool, so that the surfaces of the plastic corrugated sheets are in a groove shape, a burr shape and a messy hair shape.

The novel plastic plate corrugated packing is characterized in that: and superposing a plurality of plastic corrugated plate sheets with the determined corrugated configuration and the finished rough surface treatment, manufacturing a packing disc according to a certain chord length and height, and filling the packing disc into a packing tower in a combined mode.

A novel plastic mesh corrugated packing is formed by plastic wires with different wire diameters, and is characterized in that the plastic wires with the wire diameters within the range of 0.5-10 mm are adopted to manufacture a framework of the mesh packing, and the plastic wires with relatively thick thickness are adopted at the upper and lower parallel ends of the framework to ensure a certain supporting effect; in the area formed by the two ends being clamped, a plurality of strands of plastic wires are adopted to sequentially connect the two ends as an intermediate framework, the distance between each strand is determined by the specific surface area of the manufactured filler, the intermediate framework forms a certain included angle with the horizontal direction so as to ensure the inclination shape, the angle is between 10 and 90 degrees, each strand of framework is parallel to each other, the diameter of the plastic wires for manufacturing the intermediate framework is smaller than that of the thick plastic wires for manufacturing the frameworks at the two ends of the corrugated sheet, and the specific size of the wire diameter can be determined according to the air flow strength and the liquid flow strength.

The novel plastic mesh corrugated filler is characterized in that a plastic wire mesh with the wire diameter of 0.05-1 mm is woven on the plastic framework on the basis of the plastic framework, and single-layer, double-layer or multi-layer plastic wire meshes can be woven on the plastic framework according to different separation requirements and different operation systems to form a plastic mesh. The higher the mesh number of the screen, the easier the liquid is to form a film, and the larger the area of the formed liquid film is.

And (3) carrying out heating rolling treatment on the woven and molded plastic mesh, and processing the plastic mesh into a three-dimensional corrugated sheet with folding grooves by utilizing the plasticity of the structure of the plastic at high temperature, wherein the processed peak height is determined by the specific surface area of the prepared filler. In addition, according to different filler types, the intermediate framework can be processed into different corrugated structures according to requirements during heating and rolling, such as: oblique lines, broken lines, arc transition lines and the like.

The surface of the plastic wire mesh corrugated sheet which is processed and formed is subjected to roughness treatment, so that the hydrophilicity of the filler is increased. The specific mode is that the surface of the whole plastic silk screen is processed by using a cutting tool, and the surface of the plastic silk screen is in a burr shape by means of multiple times of light scraping and friction, so that the film forming property is enhanced.

The novel plastic mesh corrugated filler is characterized in that: and (3) overlapping a plurality of layers of the plastic wire mesh corrugated sheets with the determined corrugated configuration and the rough surface, manufacturing a packing disc according to a certain chord length and height, and filling the packing disc into a packing tower in a combined mode.

Compared with the known technology, the invention can be commented as follows:

1. the plastic ribs are manufactured on a common plastic plate, the thickness of the ribs is larger than that of the plate piece between two ribs, and the protrusions formed by the ribs increase the area of a liquid film, so that the contact area between gas and liquid is increased, and the mass transfer process is strengthened; in addition, the thickness of the plastic plate is reduced as much as possible, certain mechanical strength is guaranteed, and the quality of the filler is reduced while the stacking stability of the multiple discs of the filler is guaranteed.

2. The novel plastic plate corrugated packing can roll plastic plates with ribs into different corrugated configurations such as oblique lines, broken lines or circular transition lines according to requirements during rolling, thereby ensuring high separation efficiency.

3. According to the novel plastic plate corrugated filler, roughening treatment is carried out on a plastic corrugated plate piece by adopting a cutting tool, and the surfaces of the corrugated plate pieces are in a groove shape, a burr shape and a messy hair shape through hooking, rubbing and rubbing in different degrees, so that the surface wettability of the filler is effectively improved, a liquid phase is better formed into a film, and the mass transfer process is strengthened.

4. The corrugated sheet framework is made of plastic silk screens with different silk diameters, the plastic silk with finer silk diameters is woven on the made plastic framework, single-layer and double-layer plastic silk screens can be woven according to different separation requirements, and if efficient precise rectification is needed, multiple layers of plastic silk screens can be woven. Compared with the traditional manufacturing method of pressing the whole plastic into a corrugated sheet or punching, the novel plastic wire mesh regular packing has more outstanding wetting performance, the liquid phase is easier to form a film on the surface of the fine plastic wire, and the film area is increased, so that the effective gas-liquid contact area is greatly increased, the mass transfer process is strengthened, and the excellent mass transfer efficiency is realized.

5. When the novel plastic mesh corrugated filler is used for rolling a plastic wire mesh, the plastic wire mesh can be rolled into different corrugated configurations such as an oblique line type, a broken line type or a circular arc transition line according to requirements, so that the turbulence of a descending liquid phase and an ascending gas phase is promoted, the surface updating of a liquid film is enhanced, the mass transfer efficiency is improved, and the mass transfer performance is enhanced.

6. The surface treatment methods of the fillers commonly used at present are physical methods and chemical methods, such as high-speed sand blasting and chemical solvent dipping, but the treatment methods are easy to cause breakage and corrosion of the fine plastic silk screen. The invention adopts the cutting tool to prick the surface of the plastic by lightly scraping and rubbing the plastic wire for many times, thereby achieving the purpose of enhancing the wettability.

Drawings

FIG. 1 is a schematic view of rib structure of a plastic plate with an inclination angle of 45 °.

FIG. 2 is a schematic view showing the structure of a linear plastic plate corrugated packing having a corrugation angle of 45 °.

Fig. 3 is a schematic structural view of a plastic skeleton with an inclination angle of 45 °.

Fig. 4 is a schematic diagram of a single-layer plastic mesh structure with an inclination angle of 45 °.

FIG. 5 is a schematic view of a linear plastic mesh corrugated packing with a corrugation inclination angle of 45 °.

Detailed Description

The novel plastic wire mesh regular packing of the invention is further explained below with reference to the accompanying drawings.

Referring to fig. 1, the plastic plate corrugated packing of the present invention is prepared by first making plastic ribs on a plastic plate with a certain thickness, stretching the plastic plate at certain intervals, and forming bulges with a certain thickness between two stretches to obtain the plastic ribs. Fig. 1 is a schematic structural view of a plastic sheet with a 45 degree inclination angle of ribs.

Referring to fig. 2, the plastic plate corrugated packing according to the present invention is manufactured into a plastic plate with ribs as shown in fig. 1, and then rolled into different corrugated structures as required. Figure 2 shows a straight line plastic sheet corrugated packing sheet with a 45 degree angle of corrugation.

Referring to fig. 3, the plastic mesh corrugated packing according to the present invention is firstly required to make a plastic skeleton to provide a supporting function for a subsequently woven fine mesh. The upper and lower horizontal parallel two ends of the net sheet are made of plastic wires with wire diameters within the range of 0.5 mm-10 mm, the middle part between the two ends is a plurality of plastic frameworks which are parallel to each other and form a certain angle with the horizontal, the plastic frameworks are connected with the horizontal part, the wire diameters of the plastic frameworks of the part are smaller than the wire diameters of the plastic wires at the two ends, the horizontal included angle range is 10-90 degrees, and a plastic framework with a 45-degree included angle with the horizontal is shown in figure 1.

Referring to fig. 4, after the plastic skeleton shown in fig. 3 is manufactured, a plastic mesh sheet is formed by weaving plastic filaments having a filament diameter in the range of 0.05mm to 1mm on the skeleton, and the weaving manner may be single-layer, double-layer or multi-layer, and fig. 4 shows a single-layer woven plastic mesh sheet.

Referring to fig. 5, the plastic mesh sheet is heated to form a three-dimensional corrugated sheet with folding grooves, and corrugated ridges with different structures, such as straight lines or folding lines, can be rolled according to different separation requirements. Fig. 5 shows a straight line type corrugation structure with an inclination angle of 45 °.

The above embodiments are provided for clarity and completeness of description of the novel plastic structured packing, and the types of plastic materials, the different diameters and meshes of the plastic filaments, the change of the corrugated structure form and angle, and the use of different types of cutting tools are all within the protection scope of the present invention. Various modifications and equivalent arrangements of the disclosed embodiments are considered to be within the scope of the present invention.

Claims

1. A plastic structured packing, in particular to a plastic plate corrugated packing with plastic ribs and a net corrugated packing with a plastic framework;

manufacturing plastic ribs in a convex shape at certain intervals on a plastic plate with the thickness of 0.1-5 mm, wherein the thickness of the ribs is larger than that of a corrugated plate between two ribs; firstly, determining the distance between each plastic rib on a plate, and further stretching the plastic plate between two ribs to a certain degree, so that the thickness of the stretched plastic plate is thinner than that of the ribs, and the ribs form bulges on the plastic plate;

rolling the plastic sheet to form ribs into corrugated sheet with different corrugated configurations and with folding grooves, and rolling into corrugated configurations of oblique lines, broken lines or circular transition lines according to requirements; using a cutting tool to perform surface roughening treatment of hooking, rubbing and rubbing at different degrees on the surface of the plastic corrugated sheet, so that the surface of the plastic corrugated sheet is in a groove shape, a burr shape and a messy hair shape; superposing a plurality of plastic corrugated plates with determined corrugated configurations and finished surface roughening treatment, manufacturing a packing disc according to a certain chord length and height, and filling the packing disc into a packing tower in a combined mode;

the method comprises the following steps of manufacturing a plastic framework by using plastic wires, weaving finer plastic wires on the plastic framework to form a plastic wire mesh sheet, processing a three-dimensional corrugated sheet with folding grooves in a heating mode, and rolling the corrugated sheet into a corrugated structure;

the plastic framework is made of plastic wires with the wire diameter within the range of 0.5 mm-10 mm, the upper end and the lower end of the plastic framework are horizontal plastic wires which are parallel to each other, a plurality of plastic wires which are parallel to each other, form a certain angle with the horizontal direction and are connected with the upper end and the lower end are arranged in an area formed by clamping the two ends, and the wire diameter of the horizontal plastic wires is larger than that of the inclined plastic wires;

the corrugated sheets with different thicknesses and the plastic wires with different wire diameters are superposed and mixed to be made into plastic plate corrugated packing and plastic wire mesh packing.

2. A plastic structured packing as claimed in claim 1, wherein: the included angle between the ribs formed on the plastic plate and the horizontal direction is between 10 and 90 degrees.

3. A plastic structured packing as claimed in claim 1, wherein: the included angle between the plastic wires connected with the upper end and the lower end of the framework and the horizontal direction is between 10 and 90 degrees.

4. A plastic structured packing as claimed in claim 1, wherein: the plastic wire mesh is woven by plastic wires with the wire diameter within the range of 0.05 mm-1 mm, and the weaving mode is single-layer, double-layer or multi-layer.

5. A plastic structured packing as claimed in claim 1, wherein: the three-dimensional plastic wire mesh corrugated sheet is rolled into a diagonal line type, fold line type or arc transition line type corrugated structure.

6. A plastic structured packing as claimed in claim 1, wherein: and forming burrs on the surface of the plastic wire mesh sheet subjected to rolling forming by using a cutting tool in a mode of lightly scraping and rubbing for multiple times.