Packing layer of rectifying tower

Abstract

The utility model provides a filler layer of a rectifying tower, which relates to the field of rectifying towers and is formed by crossing and stacking a plurality of corrugated edge framework layers and corrugated layers. The corrugated edge and corner framework layer is pressed into a corrugated shape by a plate full of through holes, the peripheral surface of the pressed corrugated edge and corner framework layer is circular and is consistent with the diameter of the corrugated layer, a plurality of break angles on the top surface of the pressed corrugated edge and corner framework layer are flush, and a plurality of break angles on the bottom surface of the plurality of corrugated edge and corner framework layers are flush; fixing holes penetrating through the corrugated edge and corner framework layers and the corrugated layers are formed in the corrugated edge and corner framework layers and the corrugated layers, and the multiple corrugated edge and corner framework layers and the multiple corrugated layers are fixed by screwing bolts after at least two steel bars II penetrate through all the fixing holes; the packing layer of the rectifying tower has the beneficial effects that the packing layer is firmer in structure and faster and more convenient to assemble and fill, and the inside of the rectifying tower is stable and not easy to turn over when encountering gas-liquid phase impact.

Description

Technical Field

[0001] This utility model relates to the field of distillation columns, and more particularly to a distillation column packing layer. Background Technology

[0002] Distillation columns are one of the most common liquid-liquid separation devices in industrial production. In a distillation column, vapor enters from the bottom. The evaporated vapor phase comes into countercurrent contact with the descending liquid. During this contact, volatile components in the descending liquid continuously transfer to the vapor phase, while less volatile components in the vapor phase continuously transfer to the descending liquid. The closer the vapor phase is to the top of the column, the higher the concentration of volatile components, while the closer the descending liquid is to the bottom, the more concentrated the less volatile components become, thus achieving component separation. Based on their internal structure, distillation columns are classified into two types: plate distillation columns and packed distillation columns.

[0003] Corrugated packing in packed distillation columns has advantages such as low pressure drop, high throughput, and high separation efficiency, and is widely used in many towers in the fields of fine chemicals, fragrance industry, oil refining, fertilizer, and petrochemicals.

[0004] The existing corrugated packing layer consists of four layers of corrugated material stacked together. The four layers are then fixed from the outer periphery of the corrugated material using steel sleeves. Since the fixing is done from the outer periphery of the corrugated material, the upper and lower corrugated materials are fixed entirely by the binding force of the external steel strips, which results in an unreliable fixation. Furthermore, binding with steel strips is time-consuming and labor-intensive. After binding, the material must be able to be installed into the distillation column. Since all four layers of corrugated material must be installed into the distillation column simultaneously, and there is no support at the bottom of the corrugated material during the installation process, the installation process not only requires careful attention to avoid the steel strips from falling off due to insecure binding, but also is time-consuming and labor-intensive.

[0005] In addition, the individual corrugated plates of the corrugated packing layer are relatively soft. Under stronger impact, the corrugated plates will not only deform, but the multiple corrugated layers will also affect each other after deformation, which will disrupt the conditions for countercurrent contact between the gas and liquid phases and break the equilibrium environment of the gas and liquid phases. When the rising gas phase cannot fully exchange heat with the countercurrent liquid phase, the excessive liquid phase will easily cause the column to flood. The excessive gas phase will also easily cause the column to overflow, or even overturn the packing layer. Therefore, the modified distillation column packing layer improves this problem. Summary of the Invention

[0006] The purpose of this invention is to provide a distillation column packing layer that is more robust, faster and more convenient to assemble and fill, and stable and less prone to being overturned when encountering gas-liquid phase impacts inside the distillation column.

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

[0008] A distillation column packing layer is composed of several corrugated angular skeleton layers and corrugated layers stacked in an interlaced manner; the corrugated angular skeleton layer is made by pressing a plate with through holes into a corrugated shape, and after pressing, the circumference of the corrugated angular skeleton layer is circular and has the same diameter as the corrugated layer; after pressing, multiple corners on the top surface of the corrugated angular skeleton layer are flush, and multiple corners on the bottom surface of the multiple corrugated angular skeleton layers are flush.

[0009] The corrugated corner skeleton layer and the corrugated layer are provided with fixing holes that penetrate the corrugated corner skeleton layer and the corrugated layer. The multiple corrugated corner skeleton layers and the corrugated layers are fixed by screwing on bolts after passing through all the fixing holes with at least two steel bars II.

[0010] Furthermore, the height of the corrugated layer is 20cm; the corrugated angular skeleton layer is formed by pressing stainless steel plate.

[0011] At least two steel bars I are laid across all the top corners and welded in place. At least two support columns are welded to the bottom of each steel bar I. The other end of the support columns is welded to the filter surface in the corrugated angular skeleton layer or the bottom corner.

[0012] Furthermore, the top surface of the corrugated angular skeleton layer has four bends, and each of the four bends is welded to the reinforcing bar I after lapping.

[0013] Furthermore, the distillation column packing layer consists of five corrugated angular skeleton layers and four corrugated layers, with the top and bottom of the distillation column packing layer being corrugated angular skeleton layers;

[0014] Furthermore, the four corrugated layers between the topmost and bottommost corrugated angular skeletons and the corrugated angular skeleton layer between the four corrugated layers are fixed by steel bars II and bolts;

[0015] The diameter of the corrugated angular skeleton layer is determined according to the diameter of the distillation column, preferably 1.18m, and the inner diameter of the distillation column is 1.19m.

[0016] Furthermore, the diameter of the through holes in the corrugated angular skeleton layer and the strip plate is 4mm, 6mm, or 8mm, and the diameter of the through holes is calculated according to the designed evaporation rate.

[0017] Furthermore, the diameter of the through holes on the corrugated frame layer increases from top to bottom, preferably the diameter of the through holes in the top layer is 4mm, the diameter of the through holes in the middle layer is 6mm, and the diameter of the through holes in the bottom layer is 8mm.

[0018] Furthermore, a strip-shaped notch is provided at the center of the corrugated angle skeleton layer, and a strip plate is provided at the notch. The thickness of the strip plate is ≥0.5cm, and the perimeter of the strip plate is welded to the corrugated angle skeleton layer. The strip plate is provided with several through holes.

[0019] Furthermore, the width of the strip plate ensures that the liquid in the non-porous part of the corrugated corner skeleton layer can flow down without forming a liquid seal. The opening area of ​​the strip plate is equal to or greater than the non-porous area of ​​the corrugated corner skeleton layer, ensuring that the liquid phase in the non-porous part of the corrugated corner skeleton layer cannot form a liquid seal when it flows to the strip plate. The length of the strip plate is equal to the distance between the four top bends, and the width of the strip plate is 1 / 5 of the diameter of the corrugated corner skeleton layer.

[0020] The advantages and positive effects of this utility model are:

[0021] The main function of the corrugated edge skeleton layer is to guide the gas phase and provide the strength of the packing. We set the corrugated edge skeleton layer between the corrugated layers as a support, and the top and bottom of the entire distillation column packing layer are also equipped with corrugated edge skeleton layers. Since the corrugated edge skeleton layer is pressed into a corrugated shape by a plate full of through holes, it blocks the direct impact force and reduces the deformation and overturning phenomenon caused by the direct impact of gas and liquid phases on the corrugated layer.

[0022] Because of the multi-layer corrugated angular skeleton layer, the contact area between the gas and liquid phases is larger and the contact is better. Traditional multi-layer corrugated layer stacking results in low flow deflection efficiency due to the repeated deformation of multiple corrugated plates under impact. This application separates the corrugated layers with multiple corrugated angular skeleton layers, preventing deformation of the corrugated angular skeleton layers. Furthermore, the corrugated layers between the corrugated angular skeleton layers also deform less due to the shielding effect of the corrugated angular skeleton layers. By setting multiple corrugated angular skeleton layers and corrugated layers, and by providing through holes in the corrugated angular skeleton layers, the porosity of the packing is increased, thereby improving the separation efficiency of the packing and making it suitable for the separation of various materials.

[0023] Because a corrugated edge skeleton layer is set between the corrugated layers, and corrugated edge skeleton layers are set above and below the corrugated layers, the mutual influence between the layers is blocked. In addition, the diameter of the vent holes on the corrugated edge skeleton layer gradually increases from top to bottom, and the gas phase gradually decreases and the liquid phase gradually increases from top to bottom, thus reducing the occurrence of tower flooding and tower overflow.

[0024] Because the multi-layered corrugated angular skeleton layer and the corrugated layer are fixed by bolts after passing through all the fixing holes with at least two steel bars II, the assembly is convenient and firm, the filling is faster and more convenient, and the overturning phenomenon caused by impact force is avoided. It is also convenient to replace the corrugated angular skeleton layer with different through hole diameters when changing raw materials later.

[0025] After the corrugated corner skeleton layer is pressed onto the upper corrugated layer, its circumference becomes circular and matches the diameter of the corrugated layer, and it is placed precisely inside the distillation column. Therefore, the corrugated corner skeleton layer will not extend further outward circumferentially. Furthermore, the four corners on the top surface of the pressed corrugated corner skeleton layer are flush, and multiple corners on the bottom surface of multiple corrugated corner skeleton layers are also flush, thus ensuring the stability of the structure. Welding the four corners together with support columns further guarantees the stability of the corrugated corner skeleton layer. The stability of the corrugated corner skeleton layer is further improved by reinforcing steel I and the support columns.

[0026] Because the diameter of the through holes on the corrugated angular skeleton layer increases from top to bottom, the liquid comes into contact with the gas in small amounts and multiple times, thus enhancing the separation efficiency.

[0027] The strip plates, with a thickness of ≥1cm, further enhance the strength of the corrugated edge skeleton layer. By opening holes in the strip plates, it is ensured that the liquid can flow down the non-porous parts of the corrugated edge skeleton layer without forming a liquid seal. The function of the strip plates and through holes is to guide the liquid phase flow, avoiding the occurrence of liquid seal and increasing the pressure inside the tower.

[0028] The diameter of the pressed corrugated angular skeleton layer is 1.18m, and the inner diameter of the distillation column is 1.19m. Therefore, this packing layer is just placed inside the distillation column and the corrugated angular skeleton layer will not extend further in the circumferential direction to cause deformation. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the packing layer of the distillation column of this utility model.

[0030] Figure 2 This is a schematic diagram of a corrugated, angular skeleton layer.

[0031] Figure 3 This is a schematic diagram of the corrugated layer.

[0032] In the picture:

[0033] 1. Corrugated layer; 2. Corrugated angular skeleton layer; 2-1. Through-hole

[0034] 2-2, Corner; 3, Reinforcing bar I; 4, Support column.

[0035] 5. Strip plate 6. Bolt 7. Reinforcing bar II

[0036] 2-3. Filter surface Detailed Implementation

[0037] A distillation column packing layer is composed of five corrugated angular skeleton layers 2 and four corrugated layers 1 stacked in an alternating manner. The top and bottom of the distillation column packing layer are both corrugated angular skeleton layers 2. The corrugated angular skeleton layers 2 and the corrugated layers 1 are provided with fixing holes that penetrate through the corrugated angular skeleton layers 2 and the corrugated layers 1. After multiple layers of the corrugated angular skeleton layers 2 and the corrugated layers 1 are stacked, the four corrugated layers 1 between the topmost and bottommost corrugated angular skeleton layers and the four corrugated layers 1 between the four corrugated layers 1 are fixed by two steel bars II 7 and four bolts 6.

[0038] The height of the corrugated layer 1 is 20cm; the corrugated angular skeleton layer 2 is made of a stainless steel plate with through holes 2-1 pressed into a corrugated shape. After pressing, the circumference of the corrugated angular skeleton layer 2 is circular and has the same diameter as the corrugated layer 1, which is 1.18m. The inner diameter of the distillation column is 1.19m. From top to bottom, the diameter of the through holes 2-1 of the top layer is 4mm, the diameter of the through holes 2-1 of the middle three layers is 6mm, and the diameter of the through holes 2-1 of the bottom layer is 8mm. After pressing, the four corners 2-2 on the top surface of the corrugated angular skeleton layer 2 are flush with each other. Two steel bars I3 are laid on all the corners 2-2 at the top and welded to fix them. Two support columns 4 are welded to the bottom of each steel bar I3. The other end of the support column 4 is welded to the corner 2-2 at the bottom of the corrugated angular skeleton layer 2 to further provide support. The multiple corners 2-2 on the bottom surface of the corrugated angular skeleton layer 2 are flush with each other.

[0039] After the corrugated edge skeleton layer 2 is pressed onto the upper corrugated layer 1, the circumference of the corrugated edge skeleton layer 2 is circular and has the same diameter as the corrugated layer 1, and it is placed inside the distillation column. Therefore, the corrugated edge skeleton layer 2 will not extend further outward. Since the four corners 2-2 on the top surface of the corrugated edge skeleton layer 2 are flush with each other after pressing, and the multiple corners 2-2 on the bottom surface of the corrugated edge skeleton layer 2 are also flush with each other, the structure is stable. The stability of the corrugated edge skeleton layer 2 is further ensured by welding the four corners 2-2 with the support column 4.

[0040] Because the multi-layer corrugated angular skeleton layer 2 and corrugated layer 1 are fixed by screwing on bolts 6 after passing through all fixing holes with at least two steel bars II 7, the assembly is convenient and firm, the filling is faster and more convenient, and the overturning phenomenon caused by impact force is avoided. It is also convenient to replace the corrugated angular skeleton layer 2 with different through hole diameters 2-1 when changing raw materials later.

[0041] Furthermore, a strip-shaped notch is provided at the center of the corrugated angled skeleton layer 2, and a strip plate is provided at the notch. The strip plate is welded to the corrugated angled skeleton layer 2 around its perimeter, and the strip plate is provided with several through holes 2-1. The length of the strip plate is equal to the distance between the four top bends, and the width of the strip plate is 1 / 5 of the diameter of the corrugated angled skeleton layer 2. Therefore, the width of the strip plate ensures that liquid can flow down the non-porous part of the corrugated angled skeleton layer without forming a liquid seal.

[0042] During operation, the liquid phase is fed downwards from the top of the distillation column, and the gas phase is fed upwards from the bottom of the distillation column. During the feeding process, there is an impact force on the packing layer. Since the corrugated edge skeleton layer 2 is pressed into a corrugated shape by a plate with through holes 2-1, the corrugated edge skeleton layer 2 will not deform and will block the direct impact force on the middle corrugated layer 1, reducing the deformation and overturning phenomenon caused by the direct impact of the gas and liquid phases on the corrugated layer 1.

[0043] Because of the multi-layer corrugated angular skeleton layer 2, which has through holes 2-1, the gas phase and liquid phase not only come into contact with the corrugated layer 1, but also with the multi-layer corrugated angular skeleton layer 2. Therefore, the contact area is larger and the contact is better, which increases the porosity of the packing and thus improves the separation efficiency of the packing. It is suitable for the separation of various materials.

[0044] Because the diameter of the through holes 2-1 on the corrugated angular skeleton layer 2 increases from top to bottom, the liquid comes into contact with the gas in small amounts and multiple times, thus enhancing the separation efficiency.

[0045] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A distillation column packing layer, characterized in that: It is composed of several corrugated angular skeleton layers and corrugated layers stacked in an interlaced manner; the corrugated angular skeleton layer is pressed into a corrugated shape from a plate full of through holes. After pressing, the circumference of the corrugated angular skeleton layer is circular and has the same diameter as the corrugated layer. After pressing, multiple corners on the top surface of the corrugated angular skeleton layer are flush, and multiple corners on the bottom surface of the corrugated angular skeleton layers are flush. The corrugated corner skeleton layer and the corrugated layer are provided with fixing holes that penetrate the corrugated corner skeleton layer and the corrugated layer. The multiple corrugated corner skeleton layers and the corrugated layers are fixed by at least two steel bars II through all the fixing holes and then by screwing on bolts. The corrugated angular skeleton layer is formed by pressing stainless steel plate; At least two steel bars I are laid across all the top corners and welded in place. At least two support columns are welded to the bottom of each steel bar I. The other end of the support columns is welded to the filter surface in the corrugated angular skeleton layer or the bottom corner. The corrugated angular skeleton layer has four bends on the top surface, and each of the four bends is welded to the reinforcing bar I after lapping.

2. The distillation column packing layer according to claim 1, characterized in that: The distillation column packing layer consists of five corrugated angular skeleton layers and four corrugated layers, with the top and bottom of the distillation column packing layer being corrugated angular skeleton layers. The four corrugated layers between the topmost and bottommost corrugated angular skeletons and the corrugated angular skeleton layer between the four corrugated layers are fixed by steel bars II and bolts.

3. The distillation column packing layer according to claim 2, characterized in that: The diameter of the through holes on the corrugated angular skeleton layer is 4mm, 6mm, or 8mm.

4. The distillation column packing layer according to claim 3, characterized in that: The diameter of the through holes on the corrugated angular skeleton layer increases from top to bottom.

5. The distillation column packing layer according to claim 4, characterized in that: The diameter of the through hole in the top layer is 4mm, the diameter of the through hole in the middle layer is 6mm, and the diameter of the through hole in the bottom layer is 8mm; the height of the corrugated layer is 20cm; the diameter of the corrugated angular skeleton layer after pressing is 1.18m, and the inner diameter of the distillation column is 1.19m.

6. A distillation column packing layer according to any one of claims 1-5, characterized in that: A strip-shaped notch is provided at the center of the corrugated angle skeleton layer, and a strip plate is provided at the notch. The strip plate is welded to the corrugated angle skeleton layer around its perimeter, and the strip plate has several through holes.

7. A distillation column packing layer according to claim 6, characterized in that: The length of the strip plate is equal to the distance between the four top bends, the width of the strip plate is 1 / 5 of the diameter of the corrugated corner skeleton layer, and the diameter of the through hole on the strip plate is 4mm, 6mm or 8mm.

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