A flow-through screen plate

Abstract

The present invention relates to a tower plate, and in particular to a flow-through sieve plate. It is composed of multiple layers of sieve plates, each layer of sieve plates includes a side sieve plate, a middle sieve plate, a support ring, side bolts and connecting bolts; the support ring is an annular plate, the support ring is fixed to the tower body, the support ring has holes along the circumference, the side bolt heads are fixed to the bottom surface of the support ring, and the side bolt screws pass through the holes; the side sieve plates are fixed to both ends of the support ring by side bolts, the side sieve plates are connected to the middle sieve plates by connecting bolts, the middle sieve plates are connected by connecting bolts, the middle sieve plates are fixed to the middle of the support ring, and the middle sieve plates are fixed to the support ring by side bolts; the middle of the side sieve plates and the middle of the middle sieve plates are both stamped downwards to be stamped into a trapezoid, rectangle or arc shape. Stable operation is ensured, and uneven gas-liquid distribution caused by manufacturing and installation deviations in large-diameter towers is overcome.

Description

Technical Field

[0001] The invention relates to a tower plate, in particular to a through-flow type sieve plate. Background Art

[0002] In petrochemical, oil refining, chemical, light industry, environmental protection, medicine and atomic energy and other industrial sectors, tower plates and packings are widely used in chemical unit processes such as distillation, absorption, extraction, absorption, washing and cooling. Packings have the advantages of high separation efficiency, small pressure drop and large processing capacity, but the cost is large, the operation flexibility is small, and the requirements for supporting tower internals are high; tower plates have large operation flexibility, anti-clogging, low cost, and relatively large separation efficiency, but the pressure drop will be large and the processing capacity is low.

[0003] The through-flow sieve plate is a commonly used tower plate with the characteristics of simple structure, easy processing, convenient installation and maintenance, and low investment. However, due to the defects of unstable operation and low operating flexibility caused by the gas and liquid phases passing through the same sieve hole in the through-flow sieve plate, the application of the through-flow sieve plate is limited. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a flow-through sieve plate, which ensures stable operation and overcomes the uneven gas-liquid distribution caused by manufacturing and installation deviations in large-diameter towers.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A through-flow screen plate is composed of multiple layers of screen plates, each layer of screen plates includes a side screen plate, a middle screen plate, a support ring, side bolts and connecting bolts; the support ring is an annular plate, the support ring is fixed to the tower body, the support ring has holes along the circumference, the side bolt heads are fixed to the bottom surface of the support ring, and the side bolt screws pass through the holes; the side screen plates are fixed to both ends of the support ring by side bolts, the side screen plates are connected to the middle screen plates by connecting bolts, the middle screen plates are connected by connecting bolts, the middle screen plates are fixed to the middle of the support ring, and the middle screen plates are fixed to the support ring by side bolts; the middle of the side screen plates and the middle screen plates are both stamped downward to be stamped into a trapezoid, rectangle or arc shape.

[0007] The front and rear ends of the edge screen plate are both provided with bolt holes; one end of the left and right ends is provided with a bolt hole, and the other end is provided with an upward bend.

[0008] The front and rear ends of the middle screen plate are both provided with bolt holes, and the left and right ends are both provided with upward bends.

[0009] The side sieve plates and the middle sieve plates are both made of thin plates with a thickness of less than 4 mm.

[0010] The side sieve plates and the middle sieve plates are both made of stainless steel.

[0011] In the multi-layer sieve plates, the upper sieve plates and the lower sieve plates adjacent to each other are perpendicular to each other in the horizontal and vertical directions.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1) The middle of the side sieve plate and the middle sieve plate of the present invention are both punched downward to form a trapezoid, rectangle or arc shape. By punching some sieve holes downward, gas and liquid pass through different sieve holes respectively, which ensures stable operation and increases the rigidity of the sieve plate.

[0014] 2) When the sieve plates are installed, the upper and lower adjacent sieve plates are vertical, the liquid is evenly distributed, turbulence is increased, and the adaptability to gas-liquid loads is improved.

[0015] 3) The side sieve plates of the present invention are fixedly connected to both ends of the support ring by side bolts, the side sieve plates are connected to the middle sieve plates by connecting bolts, the middle sieve plates are connected to each other by connecting bolts, and the middle sieve plates are fixedly connected to the support ring by side bolts; the present invention is simple to manufacture and easy to install. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic front view of the structure of the present invention;

[0017] Figure 2 yes Figure 1 A-direction sectional view;

[0018] Figure 3 yes Figure 1 B-direction cross-sectional view;

[0019] Figure 4 It is a schematic diagram of the support ring structure of the present invention.

[0020] In the figure: 1-left side sieve plate 2-middle sieve plate 3-support ring 4-side bolts 5-connecting bolts 6-nuts 7-bolt holes 8-right side sieve plate 9-tower body DETAILED DESCRIPTION

[0021] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0022] Example:

[0023] like Figures 1 to 4 As shown, a flow-through sieve plate includes an upper sieve plate and a lower sieve plate, and the upper sieve plate and the lower sieve plate each include a left sieve plate 1, a right sieve plate 8, a middle sieve plate 2, a support ring 3, side bolts 4 and connecting bolts 5.

[0024] like Figure 4 As shown, the support ring 3 is a circular ring plate, and bolt holes 7 are evenly distributed on the circumference of the support ring 3, and the bolt holes 7 correspond to the side bolts 4.

[0025] like Figure 1 to Figure 3 As shown, the support ring 3 is horizontally welded on the tower body 9 , the heads of the side bolts 4 are fixed to the bottom surface of the support ring 3 , and the screws of the side bolts 4 pass through the bolt holes 7 .

[0026] The left side sieve plate 1 is made of a stainless steel sheet with a thickness of less than 4 mm. The left side sieve plate 1 is a flat plate. The middle part of the left side sieve plate 1 is punched downward to form a trapezoid. The left end, front end and rear end of the left side sieve plate 1 are provided with circular holes corresponding to the bolt holes 7 of the support ring 3. The right end of the left side sieve plate 1 is provided with an upward bend and is provided with bolt holes corresponding to the connecting bolts 5.

[0027] The right side sieve plate 8 is made of a stainless steel sheet with a thickness of less than 4 mm. The right side sieve plate 8 is a flat plate. The middle part of the right side sieve plate 8 is punched downward to form a trapezoid. The right end, front end and rear end of the right side sieve plate 8 are provided with circular holes corresponding to the bolt holes 7 of the support ring 3. The left end of the right side sieve plate 8 is provided with an upward bend and is provided with bolt holes corresponding to the connecting bolts 5.

[0028] The middle sieve plate 2 is made of a stainless steel sheet with a thickness of less than 4 mm. The middle sieve plate 2 is a flat plate. The middle of the middle sieve plate 2 is punched downward to form a trapezoid. The left and right ends of the middle sieve plate 2 are provided with upward bends and bolt holes corresponding to the connecting bolts 5 are provided.

[0029] The left end, front end and rear end of the left sieve plate 1 are fixed to the support ring 3 by side bolts 4 and nuts 6, and the right end is connected to the left end of the middle sieve plate 2 by connecting bolts 5, the front end and rear end of the middle sieve plate 2 are fixed to the support ring 3 by side bolts 4 and nuts 6, the right end of the middle sieve plate 2 is connected to the left end of the right sieve plate 8 by connecting bolts 5, and the right end, front end and rear end of the right sieve plate 8 are fixed to the support ring 3 by side bolts 4 and nuts 6.

[0030] like Figure 2 , Figure 3 As shown, when the sieve plates are installed, the adjacent upper sieve plates and lower sieve plates are perpendicular to each other horizontally and vertically, the upper sieve plates are arranged longitudinally, and the lower sieve plates are arranged transversely.

[0031] The present invention ensures stable operation and increases the rigidity of the sieve plate by punching some sieve holes downwards, so that gas and liquid pass through different sieve holes respectively. When the sieve plate is installed, the upper and lower adjacent sieve plates are vertical, the liquid is evenly distributed, turbulence is increased, and the adaptability to gas-liquid load is improved. The present invention is simple to manufacture and easy to install.

[0032] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A through-flow screen plate, characterized in that: It is composed of multiple layers of sieve plates, each layer of sieve plates includes a side sieve plate, a middle sieve plate, a support ring, side bolts and connecting bolts; the support ring is an annular plate, the support ring is fixed to the tower body, the support ring has holes along the circumference, the side bolt heads are fixed to the bottom surface of the support ring, and the side bolt screws pass through the holes; the side sieve plates are fixed to both ends of the support ring by side bolts, the side sieve plates are connected to the middle sieve plates by connecting bolts, the middle sieve plates are connected by connecting bolts, the middle sieve plates are fixed to the middle of the support ring, and the middle sieve plates are fixed to the support ring by side bolts; the middle of the side sieve plates and the middle sieve plates are both stamped downward to be stamped into a trapezoid, rectangle or arc shape; The front and rear ends of the edge sieve plate are provided with bolt holes; one end of the left and right ends is provided with a bolt hole, and the other end is provided with an upward bend; The middle screen plate is provided with bolt holes at both the front and rear ends, and upward bends at both the left and right ends; The side sieve plates and the middle sieve plates are both made of thin plates with a thickness of less than 4 mm; In the multi-layer sieve plates, the upper sieve plates and the lower sieve plates adjacent to each other are perpendicular to each other in the horizontal and vertical directions.

2. A through-flow screen plate according to claim 1, characterized in that: The side sieve plates and the middle sieve plates are both made of stainless steel.

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