High-efficiency three-dimensional mass transfer tower plate with self-cleaning characteristic for resisting pollution and blockage

Abstract

The invention relates to an anti-fouling and anti-blocking efficient three-dimensional mass transfer tower plate with a self-cleaning characteristic, which comprises a plate lift gas opening and an injection assembly arranged on the plate lift gas opening, and is characterized in that an arch-shaped hole array is formed in a side plate of the injection assembly, and a free end fence strip is formed; a streamlined riser side plate is arranged between the plate riser opening and the injection assembly; and a disturbance assembly for retarding dirt deposition is arranged in a liquid retention area on the tower plate. On one hand, the disturbance assembly is additionally arranged in the liquid retention area, so that the deposition and growth process of dirt on the tower plate is slowed down to a great extent; on the other hand, the gas phase motion resistance is reduced through introduction of the arc rectangular gas rising pipe; due to the arrangement of the arch-shaped open pore array of the jet cover, the equivalent diameter of the open pores is increased, and meanwhile, a free end fence strip is formed, so that the jet cover has a self-cleaning effect, the anti-pollution and anti-blocking performance of the tower plate is greatly improved, and the service life of the tower plate is prolonged.

Description

Technical Field

[0001] The present invention relates to the field of distillation technology in the petroleum, chemical and pharmaceutical industries, and in particular to a high-efficiency three-dimensional mass transfer tower plate with self-cleaning properties for resisting fouling and clogging, which can effectively delay the anti-clogging period of the distillation tower and improve the separation efficiency. Background Art

[0002] In chemical production, when the material contains solid particles, heavy components in the oil phase, or the raw materials decompose during the distillation process to produce suspended matter or floccules, they usually accumulate over time, and the formed products will be deposited and aggregated on the tower plate, gradually blocking the gas or liquid phase channels, resulting in a sharp decrease in the operating load and distillation efficiency of the distillation tower, and even causing system interruption in severe cases. Therefore, the distillation tower of the non-clean system is generally stopped for cleaning every other cycle. The cleaning cycle depends on the blockage situation. The cleaning cycle is sometimes less than a month, which seriously affects the normal operation of the process and greatly increases the labor intensity of the workers.

[0003] Compared with the bubbling tray, the jet type three-dimensional mass transfer tray is a more resistant to blockage. For example, Chinese patent ZL202222749127.6 discloses a large flux anti-blockage tray, which retains the riser and replaces the sleeve with two layers of baffles staggered on the upper part. The two layers of baffles have a relatively small crushing effect on the liquid and gas phases, and the gas phase cannot shear the liquid phase into smaller droplets, so the efficiency is relatively low. The other two layers of staggered baffles need to be fed in separately from the manhole and need to be welded with other components such as the tower wall and downcomer in the tower, which makes disassembly and assembly very troublesome.

[0004] At present, various anti-clogging tower plates based on three-dimensional mass transfer tower plates have greatly extended the blockage period of mass transfer elements by utilizing the large-volume injection characteristics, and have a wide range of application scenarios. However, for highly non-clean systems, such as the current treatment process of lignite wastewater, the deposition of scale on the tower plates has not been resolved, especially in the liquid retention area. The scale layer can often reach 10-20mm in 10-15 days. Once scale accumulates on the tower plates, the scale layer will grow rapidly, thereby causing blockage of the mass transfer elements.

[0005] Therefore, it is necessary to provide a more novel and comprehensive technical solution to simultaneously overcome the technical difficulties of dirt deposition on the plate and dirt clogging of the mass transfer element, so as to achieve the purpose of extending the clogging period to the greatest extent while ensuring the separation efficiency. Summary of the invention

[0006] The purpose of the present invention is to provide a high-efficiency three-dimensional mass transfer tower plate with self-cleaning properties for resisting fouling and plugging, in view of the shortcomings of the existing anti-plugging tower plates.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is: A high-efficiency three-dimensional mass transfer tower plate with self-cleaning properties for resisting fouling and clogging, comprising a plate gas lift opening and an injection assembly arranged thereon, characterized in that an array of arched openings is provided on the side plate of the injection assembly to form a free end railing; a streamlined gas lift pipe side plate is provided between the plate gas lift opening and the injection assembly; and a disturbance assembly for slowing down dirt deposition is provided in the liquid retention area on the tower plate.

[0008] Furthermore, a number of plate air riser opening positions are evenly arranged on the tower plate, and at the plate air riser opening positions, the tower plate material is stamped and bent to both sides along the center line to form a streamlined structure. The streamlined structure formed by stamping and bending on both sides is the air riser side plate, and the plate air riser opening position is formed at the stamping after forming a plate air riser opening; the plate air riser opening is rectangular, and the two air riser side plates are located on the long sides of the rectangle, and the two air riser side plates surround the air riser, and an injection assembly is arranged directly above the air riser.

[0009] Furthermore, a disturbance component is arranged on the side of the downcomer or the overflow weir and around the injection component, and the opening size of the disturbance component is based on preventing liquid leakage.

[0010] Furthermore, the disturbance component is a plate hole opened on the plate, including one or more combinations of sieve holes, fixed valves or inclined holes; the diameter of the plate holes opened on the plate is 0-30 mm; the interval between the plate holes opened on the plate is 2-8 times the diameter of the plate holes; when the fixed valve or inclined hole is opened, the inclination direction should be parallel to the liquid flow direction on the plate.

[0011] Furthermore, the injection assembly includes a separation plate, an injection hood end plate and an injection hood side plate; the injection hood side plate is in the same direction as the riser side plate and a certain gap is retained; the lower edge of the injection hood end plate is connected to the tower plate on the rectangular short side of the plate riser opening, and the upper edge is connected to the separation plate; the riser side plate, the injection hood end plate and the injection hood side plate form an arc-shaped rectangular gas channel that is larger at the bottom and smaller at the top.

[0012] Furthermore, a certain gap is maintained between the lower edge of the side plate of the injection hood and the tower plate, and a certain gap is maintained between the upper edge of the side plate of the injection hood and the separation plate; The lower edge of the spray hood end plate is welded to the tower plate, the upper edge of the spray hood end plate is welded to the separation plate, and two spray hood side plates are welded to the two spray hood end plates to form a trapezoidal spray hood body.

[0013] Furthermore, a gap of 10-50 mm is retained between the lower edge of the side plate of the injection hood and the tower plate; a gap of 20-80 mm is retained between the upper edge of the side plate of the injection hood and the top of the separation plate.

[0014] Furthermore, the convex side of the streamlined arc of the riser side plate faces the plate riser opening, and the horizontal distance between the tops of the two riser side plates is 1 / 3 to 1 / 4 of the length of the short side of the plate riser opening.

[0015] Furthermore, the separation plate includes a horizontal plate and vertical plates symmetrically arranged on both sides of the horizontal plate. The horizontal plate and the vertical plate are connected and transitioned by an arc angle. The upper edge of the injection hood end plate is welded and fixed to the horizontal plate. The vertical plate does not contact the injection hood side plate and can cover the gap between the injection hood side plate and the upper edge of the injection hood end plate. The size of the horizontal plate is not less than the size of the plate air lifting opening.

[0016] Compared with the prior art, the present invention has the following beneficial effects: On the one hand, the present invention slows down the deposition and growth process of dirt on the tower plate to a great extent by adding a disturbance component in the liquid retention area; on the other hand, the introduction of an arc-shaped rectangular riser reduces the resistance to gas phase movement; the arrangement of the bow-shaped opening array of the injection hood not only increases the equivalent diameter of the opening, but also forms free end bars, which vibrate under the action of high-speed gas, making it difficult for an accumulation layer to form or can be removed due to vibration after the stroke, thereby making the injection hood produce a self-cleaning effect, greatly increasing the anti-fouling and clogging performance of the tower plate and extending the service life of the tower plate.

[0017] The present invention can effectively promote the flow of liquid on the tower plate through the composite disturbance component, especially can increase the disturbance of liquid in the retention area on the plate, thereby delaying the deposition of dirt on the tower plate, and at the same time can also increase the gas phase flux and reduce the plate pressure drop.

[0018] The arc-shaped rectangular riser structure of the present invention not only increases the boundary length of gas-liquid contact, but also its arc-shaped gas flow shape can reduce the degree of gas turbulence, thereby achieving the effect of reducing resistance.

[0019] In the present invention, the arc-shaped long side of the preferred riser is directly punched by the tower plate at the plate hole, and is formed in one piece without welding or other additional materials. The production cost is low, the structural strength is high, and it is not easy to form dirt precipitation at the arc.

[0020] In the present invention, the gap between the lower edge of the injection hood assembly and the tower plate can be adjusted according to the height of the riser. A larger gap is beneficial to increasing the threshold of the thickness of dirt deposition allowed by the tower plate, greatly extending the tower plate cleaning cycle, and improving the tower plate's anti-clogging performance. The gap between the side plate of the injection hood and the separation plate expands the gas phase flow area, making it less prone to clogging. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure shows a three-dimensional structure schematic diagram of a high-efficiency three-dimensional mass transfer tray with self-cleaning properties for resisting fouling and clogging according to the present invention; Figure 2 The figure shows a three-dimensional cross-sectional structure schematic diagram of the injection assembly 32 in the present invention; Figure 3 The figure shows the structure schematic diagram of the injection hood side plate 323 in the present invention; In the figure: 1. left downcomer plate, 2. right downcomer plate, 3. tower plate, 31. disturbance assembly, 32. injection assembly, 33. plate air riser opening, 34 air riser side plate, 321. separation plate, 322. injection hood end plate, 323. injection hood side plate, 3231. arched opening array, 3232. injection hood side plate upper edge, 3233. injection hood side plate lower edge, 3234. free end railing. DETAILED DESCRIPTION

[0022] The present technical solution is described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] The present invention discloses a high-efficiency three-dimensional mass transfer tower plate with self-cleaning characteristics for resisting fouling and clogging, comprising a left downcomer plate 1, a right downcomer plate 2, and a tower plate 3; the tower plate 3 comprises a disturbance component 31 mainly used for disturbing the flow of liquid on the plate, an injection component 32 for mass transfer, a plate air riser opening 33, and an air riser side plate 34.

[0024] The disturbance component 31 is a plate hole opened on the plate, such as one or more combinations of sieve holes, fixed valves or inclined holes. It is preferably set in the liquid retention area on the tower plate, such as the side of the downcomer or overflow weir, the front and back of the side plate of the injection component, the left and right of the end plate, etc. The diameter of the plate hole opened on the plate is 0-30mm, and the plate hole diameter is 0mm, that is, there is no hole on the plate. At this time, the tower plate only has the injection mass transfer function. The disturbance component here does not require mass transfer, and the setting of the opening rate can be determined according to the severity of the liquid retention area, and the relative aperture is small, there will be no leakage, and the deposition time can be extended. When the solid valve or inclined hole is opened, the inclination direction should be parallel to the liquid flow direction on the plate; the plate hole spacing on the plate is 2-8 times the plate hole diameter. During normal operation, the gas phase passes through the disturbance component 31 in the form of bubbles, which can disturb the liquid layer on the plate to promote the turbulence of the liquid phase on the plate, accelerate the flow rate of the liquid phase, and delay the dirt deposition cycle.

[0025] The purpose of the disturbance component 31 is to slow down the deposition of dirt and mainly to disturb the liquid. The arrangement area is the liquid retention area outside the injection component 32.

[0026] A number of plate air riser opening positions are evenly arranged on the tower plate. At the plate air riser opening positions, the tower plate material is punched and bent to both sides along the center line to form a streamlined structure. The streamlined structure formed by punching and bending on both sides is the air riser side plate 34. After punching, the plate air riser opening position forms a plate air riser opening 33; the plate air riser opening 33 is rectangular, and the two air riser side plates 34 are located on the long sides of the rectangle. The two air riser side plates surround the air riser, and an injection assembly 32 is arranged directly above the air riser.

[0027] The injection assembly 32 is arranged directly above the riser side plate 34 for the purpose of mass transfer, and is composed of a separation plate 321, a spray hood end plate 322 and a spray hood side plate 323. The spray hood side plate 323 is in the same direction as the riser side plate 34, and a certain gap is reserved; the lower edge of the spray hood end plate 322 is connected to the tower plate 3 on the rectangular short side of the plate riser opening 33, and the upper edge is connected to the separation plate 321; the riser side plate 34, the spray hood end plate 322 and the spray hood side plate 323 form an arc rectangular gas channel with a larger lower part and a smaller upper part, which is more conducive to reducing the plate pressure drop and improving the gas-liquid mass transfer capacity compared to other straight pipe type risers.

[0028] As an embodiment, preferably, the convex side of the streamlined arc of the riser side plate 34 faces the plate riser opening, and the horizontal distance between the tops of the two riser side plates 34 is half the length of the short side of the plate riser opening.

[0029] The side plate 323 of the spray hood is provided with an array of arched openings 3231 and a free end rail 3234. Figure 3 There are five free end rails in the middle and the upper and lower parts. Since one end of the free end rail is not bound, it will produce obvious vibration under the action of high-speed gas, and the side plate will be self-cleaned. The lower edge 3233 of the injection hood side plate and the tower plate 3 retain a certain gap, and the upper edge 3232 of the injection hood side plate and the separation plate 321 retain a certain gap.

[0030] In the present invention, the riser side plate 34 is integrally stamped with the tower plate. After being combined with the injection assembly, the injection cover end plate is also the riser end plate. The end plate and the riser side plate 34 form an arc-rectangular gas channel.

[0031] As an embodiment, the lower edge of the spray hood end plate 322 is welded to the tower plate, the upper edge of the spray hood end plate is welded to the separation plate, and the two spray hood side plates are welded to the two spray hood end plates to form a trapezoidal spray hood body. The lower edge of the spray hood side plate 323 retains a gap of 10-50 mm with the tower plate; the upper edge of the spray hood side plate retains a gap of 20-80 mm with the top of the separation plate.

[0032] As an embodiment, the number of spoiler components arranged on the left and right sides of the spray hood end plate is greater than the number of spoiler components arranged in front and behind the spray hood side plates.

[0033] As an embodiment, the separation plate 321 includes a horizontal plate and vertical plates symmetrically arranged on both sides of the horizontal plate. The horizontal plate and the vertical plate are connected and transitioned by an arc angle. The upper edge of the injection hood end plate 322 is welded and fixed to the horizontal plate. The vertical plate does not contact the injection hood side plate 323 and can cover the gap between the injection hood side plate and the upper edge of the injection hood end plate. The size of the horizontal plate is not less than the size of the plate air lifting opening 33. Preferably, the width of the horizontal plate is equal to the short side length of the plate air lifting opening, and the length of the horizontal plate is 1.5-2 times the long side length of the plate air lifting opening.

[0034] The dimensions of the specific plate air rise opening, the disturbance component, the air riser side plate, etc. in the present invention can be determined according to actual conditions, which can ensure normal mass transfer of the injection component while minimizing the deposition of the accumulation layer, thereby extending the service life and achieving the purpose of self-cleaning.

[0035] In the present invention, the disturbance component and the injection component realize coupled mass transfer: an auxiliary liquid disturbance component is added to the tower plate, not for the purpose of mass transfer, but only to increase the disturbance of the liquid on the tower plate. The disturbance component can slow down the deposition time of dirt on the tower plate on the one hand, and is also beneficial to the cleaning of dirt on the other hand, while also increasing the gas flux.

[0036] Traditional jet tower plates require holes to be drilled on the tower plates, and the material at the holes will be cut off, resulting in material waste and reducing the rigidity of the tower plates. Compared with the riser welding in other patents, the present application has the characteristics of low processing cost, and because the riser side plates and the tower plates are in a circular arc transition, dirt is not easy to stay and accumulate at this position, reducing the probability of deposition and blockage; in addition, the longitudinal section of the riser is changed from the original straight up and down type to the nozzle type of the flow field, with lower gas phase resistance; the gas has a greater ability to lift liquid.

[0037] Self-cleaning characteristics: The openings on the side panels of the injection hood are in the form of an arched array of openings. The arched array of openings has a larger equivalent diameter and has staggered free-end bars. When the gas passes through the openings at high speed, the free ends will vibrate, thereby removing dirt from the surface and achieving self-cleaning characteristics.

[0038] Any matters not described in the present invention are applicable to the prior art.

Claims

1. A high-efficiency three-dimensional mass transfer tower plate with self-cleaning properties for anti-fouling and anti-clogging, comprising a plate gas lifting opening and an injection assembly arranged thereon, characterized in that: The side plate of the injection assembly is provided with an array of arched openings to form free end railings; a streamlined riser side plate is provided between the plate riser opening and the injection assembly; a disturbance assembly for slowing down dirt deposition is provided in the liquid retention area on the tower plate.

2. The high-efficiency three-dimensional mass transfer tray with self-cleaning properties for resisting fouling and clogging according to claim 1, characterized in that: A number of plate air riser opening positions are evenly arranged on the tower plate. At the plate air riser opening positions, the tower plate material is stamped and bent to both sides along the center line to form a streamlined structure. The streamlined structure formed by stamping and bending on both sides is the air riser side plate. After stamping, the plate air riser opening position forms a plate air riser opening; the plate air riser opening is rectangular, two air riser side plates are located on the long sides of the rectangle, the two air riser side plates surround the air riser, and an injection assembly is arranged directly above the air riser.

3. The high-efficiency three-dimensional mass transfer tray with self-cleaning properties for resisting fouling and clogging according to claim 1, characterized in that: A disturbance component is arranged on the side of the downcomer or overflow weir and around the injection component, and the opening size of the disturbance component is based on the principle of preventing liquid leakage.

4. The high-efficiency three-dimensional mass transfer tray with self-cleaning properties for resisting fouling and clogging according to claim 1, characterized in that: The disturbance component is a plate hole opened on the plate, including one or more combinations of sieve holes, fixed valves or inclined holes; the diameter of the plate hole opened on the plate is 0-30mm; the interval of the plate holes opened on the plate is 2-8 times the diameter of the plate hole; when the fixed valve or inclined hole is opened, the inclination direction should be parallel to the liquid flow direction on the plate.

5. The high-efficiency three-dimensional mass transfer tray with self-cleaning properties for resisting fouling and clogging according to claim 1, characterized in that: The injection assembly includes a separation plate, an injection hood end plate and an injection hood side plate; the injection hood side plate is in the same direction as the riser side plate and a certain gap is retained; the lower edge of the injection hood end plate is connected to the tower plate on the rectangular short side of the plate riser opening, and the upper edge is connected to the separation plate; the riser side plate, the injection hood end plate and the injection hood side plate form an arc-shaped rectangular gas channel that is larger at the bottom and smaller at the top.

6. The high-efficiency three-dimensional mass transfer tray with self-cleaning properties for resisting fouling and clogging according to claim 5, characterized in that: A certain gap is kept between the lower edge of the side plate of the injection hood and the tower plate, and a certain gap is kept between the upper edge of the side plate of the injection hood and the separation plate; The lower edge of the spray hood end plate is welded to the tower plate, the upper edge of the spray hood end plate is welded to the separation plate, and two spray hood side plates are welded to the two spray hood end plates to form a trapezoidal spray hood body.

7. The high-efficiency three-dimensional mass transfer tray with self-cleaning properties for resisting fouling and clogging according to claim 6, characterized in that: A gap of 10-50 mm is maintained between the lower edge of the side plate of the injection hood and the tower plate; a gap of 20-80 mm is maintained between the upper edge of the side plate of the injection hood and the top of the separation plate.

8. The high-efficiency three-dimensional mass transfer tray with self-cleaning properties for resisting fouling and clogging according to claim 1, characterized in that: The convex side of the streamlined arc of the riser side plate faces the plate riser opening, and the horizontal distance between the tops of the two riser side plates is 1 / 3 to 1 / 4 of the length of the short side of the plate riser opening.

9. The high-efficiency three-dimensional mass transfer tray with self-cleaning properties for resisting fouling and clogging according to claim 1, characterized in that: The separation plate includes a horizontal plate and vertical plates symmetrically arranged on both sides of the horizontal plate. The horizontal plate and the vertical plate are connected and transitioned by an arc angle. The upper edge of the injection hood end plate is welded and fixed to the horizontal plate. The vertical plate does not contact the side plate of the injection hood and can cover the gap between the side plate of the injection hood and the upper edge of the end plate of the injection hood. The size of the horizontal plate is not less than the size of the plate air lifting opening.

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