A light ends removal column

Abstract

The present application relates to production device technical field, especially to a kind of light removal rectifying tower, the top of the main body is provided with gas outlet, the upper right side of the main body is provided with reflux port, the middle left side of the main body is provided with feed inlet, the lower right side of the main body is provided with gas inlet, the bottom of the main body is provided with discharge port, the inside of the main body is fixedly provided with several fixed mechanisms, the upper portion of the fixed mechanism is provided with tray mechanism, the present application is designed into the size of upper cross section smaller than the size of lower cross section by sieve hole, greatly reduce the generation of liquid leakage phenomenon, the lower surface of tray mechanism is set as arc shape, when the liquid of lower plate splashes to the bottom of upper plate with gas, it will flow to the tip of arc surface under the action of gravity, and then drop back to lower plate, without staying on the lower surface of upper plate to cause pollution, the upper surface of tray is designed into special shape, different filtering impurities effect can be generated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of production devices, in particular to a light-removing rectifying column. BACKGROUND

[0002] The light-removing rectifying column is a tower type gas-liquid contact device for rectification. By utilizing the different volatility of each component in the mixture, i.e. the different vapor pressure of each component at the same temperature, the light component (low-boiling substance) in the liquid phase is transferred to the gas phase, and the heavy component (high-boiling substance) in the gas phase is transferred to the liquid phase, so as to achieve the purpose of separation. The light-removing rectifying column is also a mass transfer and heat transfer device widely used in petroleum and chemical production.

[0003] Patent No. CN107812503A discloses a light-removing column, the main content of which is: a light-removing column, comprising: a base ring plate, a rib plate, a skirt, a cover plate, an open outlet pipe rib plate, a liquid outlet pipe, a bottom cone, an exhaust pipe, a lower cylinder, a coil pipe, a field liquid level meter pipe, a lower variable liquid level meter pipe, an upper variable liquid level meter pipe, an upper field liquid level meter pipe, a liquid level meter joint, a lower conical cylinder, a pressure gauge joint, a first thermocouple port, a middle cylinder, a second thermocouple port, a tray, a first liquid seal plate, an upper conical cylinder, an upper cylinder, a reflux inlet, a second liquid seal plate, a top oval head, a gas outlet, a vent and an upper pressure gauge port. The light-removing column has simple structure and low manufacturing cost. The light-removing column is provided with three layers of cylinder and continuous coiled coil pipe, so that it has the advantages of large production capacity, high separation efficiency, small pressure drop, small liquid holdup, large operation flexibility and the like, and has good light-removing effect and high efficiency.

[0004] The existing light-removing rectifying column at least has the following problems which have not been solved:

[0005] 1. In actual production, when the gas velocity is too small or the opening of the tray is too large, the tray will produce liquid leakage phenomenon;

[0006] 2. The upward gas flow sometimes carries the liquid droplets on the lower tray to the upper tray, and the liquid droplets are not easy to drop, causing pollution of the upper tray;

[0007] Therefore, a light-removing rectifying column is proposed, which can effectively reduce the generation of liquid leakage phenomenon and upper tray pollution phenomenon. SUMMARY

[0008] The purpose of the present application is to provide a light-removing rectifying column to reduce the generation of liquid leakage phenomenon and upper tray pollution phenomenon in actual production.

[0009] In order to achieve the above object, the present application provides the following technical scheme: a light-removing rectifying tower, comprising a main body, a gas outlet is arranged at the top of the main body, a reflux inlet is arranged at the upper right side of the main body, a feed inlet is arranged at the middle left side of the main body, a gas inlet is arranged at the lower right side of the main body, a discharge outlet is arranged at the bottom of the main body, a plurality of fixed rings are fixedly arranged in the main body, a tray is arranged at the upper part of the fixed ring, the fixed ring is used for fixing the tray on the main body, and the tray is used for providing a contact place for gas-liquid two phases.

[0010] Preferably, the outer ends of the channels of the gas outlet at the top of the main body, the reflux inlet at the upper right side of the main body, the feed inlet at the middle left side of the main body, the gas inlet at the lower right side of the main body and the discharge outlet at the bottom of the main body are all welded and connected with flanges.

[0011] By welding flanges at the outer ends of the channels of the gas outlet, the reflux inlet, the feed inlet, the gas inlet and the discharge outlet, compared with traditional welding, the flanges have more flexibility, when the pipeline connected with the main body of the rectifying tower needs to be replaced due to leakage and other accidents, the flanges can make installation and disassembly more convenient while ensuring sealing effect.

[0012] Preferably, the fixed ring comprises a supporting ring and a cylindrical boss, the supporting ring is a three-step annular structure, the supporting ring is fixed in the main body, and four cylindrical bosses are uniformly distributed on the upper surface of the supporting ring in the circumferential direction.

[0013] Preferably, the tray is a circular stepped structure, the steps of the tray correspond to the steps of the supporting ring, a plurality of sieve holes are arranged on the upper surface and the vertical step surface of the tray, four fixing holes are uniformly arranged on the upper surface of the tray in the circumferential direction, the cylindrical boss is inserted into the fixing hole, a discharge hole is arranged at the edge of the fixing hole, a downcomer is arranged at the lower end of the discharge hole, and an overflow weir is arranged at the upper edge of the discharge hole.

[0014] By arranging the supporting ring, the supporting ring can support the tray, by arranging the supporting ring and the tray into a three-step structure, different from the common flat tray, the stepped tray can store more liquid, which is beneficial to the full contact between gas and liquid, by arranging a plurality of sieve holes on the upper surface and the vertical step surface of the tray, more gas can pass through the sieve holes to contact with the liquid, by arranging the cylindrical boss on the supporting ring and the fixing hole with a size matched with the cylindrical boss on the tray, when installing, the tray is only needed to be placed on the fixed ring, and then the cylindrical boss is inserted into the fixing hole, by arranging the overflow weir, the liquid flowing down the upper plate can be temporarily intercepted, the liquid height is maintained, so that the liquid can fully contact with the gas passing through the sieve hole, and by arranging the downcomer, the liquid of the upper plate can flow to the lower plate more stably, and the liquid cannot splash everywhere to cause pollution.

[0015] Preferably, the lower surface of the tray is arranged as an arched structure.

[0016] By arranging the lower surface of the tray as an arched structure, when the liquid on the lower plate splashes to the bottom of the upper plate with the gas, it will flow to the tip of the arched surface under the action of gravity, and then drip back to the lower plate, without staying on the lower surface of the upper plate to cause pollution.

[0017] Preferably, the size of the upper cross section of the sieve hole is smaller than the size of the lower cross section.

[0018] By designing the sieve hole with the size of the upper cross section smaller than the size of the lower cross section, the liquid on the upper surface is less likely to leak into the lower plate through the sieve hole, and according to the Venturi effect, when the restricted flow passes through the reduced flow section, the fluid appears to increase in speed, which is inversely proportional to the flow section, so when the gas passes through the sieve hole, the sieve hole will increase the speed of the gas, making it more difficult for the liquid to leak into the lower plate.

[0019] Preferably, the inner surface of the main body and the outer surface of the tray are coated with an anti-corrosion coating.

[0020] By coating the inner surface of the main body and the outer surface of the tray with an anti-corrosion coating, the working surfaces of the tray and the main body are well protected, effectively improving the service life of the equipment.

[0021] As an embodiment of the present application, the upper surface of the tray is wavy, and the sieve hole is opened in the raised part of the upper surface.

[0022] By designing the upper surface of the tray as wavy, the shapes of the two sides of the sieve hole are the same, and the outer surface of the tray has a certain curvature, so the entire tray has a low impact on the external liquid flow rate. However, due to the height difference between the highest point and the lowest point on the upper surface, some difficult-to-dissolve or insoluble solid substances in the liquid can be left in the recess during the flow of the liquid, which can be cleaned up during shutdown.

[0023] As an embodiment of the present application, the upper surface of the tray is a trapezoidal boss with the same angle on both sides, and the sieve hole is opened at the top level of the boss.

[0024] By designing the upper surface of the tray as a trapezoidal boss with the same angle on both sides, there is no arc transition between the outer surfaces of every two adjacent sieve holes, so when the external liquid flows over the upper surface of the tray, the flow rate will decrease to a certain extent, allowing the gas-liquid two phases to be more fully contacted, and some difficult-to-dissolve or insoluble substances in the liquid can be left in the recess, which can be cleaned up during shutdown.

[0025] As an embodiment of the present application, the upper surface of the tray is a straight-angle trapezoidal boss with slope on one side, and the sieve hole is opened at the top level of the boss.

[0026] By designing the upper surface of the tray as a single-side sloped right-angled trapezoidal boss, when the external liquid flows through the upper surface of the tray, the sloped side can reduce the liquid flow rate, so that the gas-liquid two phases can be more fully contacted, the right-angled side has a great influence on the liquid flow rate, has a great hindering effect on the reverse flow of the liquid, can prevent the backflow of the bottom liquid, and can leave some difficultly soluble or insoluble substances in the recess for centralized cleaning when shutdown.

[0027] Compared with the prior art, the beneficial effects of the present application are:

[0028] 1、The present application greatly reduces the generation of liquid leakage by designing the sieve hole as a size smaller than the lower cross-sectional size.

[0029] 2、The present application sets the lower surface of the tray as an arched shape, when the liquid of the lower plate splashes to the bottom of the upper plate with the gas, it will flow to the tip of the arched surface under the action of gravity, and then drop back to the lower plate, without staying on the lower surface of the upper plate to cause pollution.

[0030] 3、The present application can produce different effects of filtering impurities by designing the upper surface of the tray as a special shape. DETAILED DESCRIPTION

[0031] Figure 1 It is a front overall sectional view of the present application;

[0032] Figure 2 It is a top view of the fixed ring of the present application;

[0033] Figure 3 It is a side view of the fixed ring of the present application;

[0034] Figure 4 It is a top view of the wave-shaped tray in the present application;

[0035] Figure 5 It is a front sectional view of the wave-shaped tray in the present application;

[0036] Figure 6 It is a top view of the tray with the same angle on both sides of the boss in the present application;

[0037] Figure 7 It is a front sectional view of the tray with the same angle on both sides of the boss in the present application;

[0038] Figure 8 It is a top view of the tray with a single-side right angle of the boss in the present application;

[0039] Figure 9 It is a front sectional view of the tray with a single-side right angle of the boss in the present application;

[0040] In the figure: main body 1, gas outlet 2, reflux port 3, feed inlet 4, air inlet 5, discharge port 6, fixed ring 7, tray 8, cylindrical boss 71, retainer ring 72, screen hole 81, fixed hole 82, discharge hole 83, overflow weir 84, downcomer 85. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0042] Case 1:

[0043] Please refer to Figures 1 to 9 The present application provides a technical solution: a light-removing rectifying tower, comprising a main body 1, a gas outlet 2 is formed at the top of the main body 1, a reflux port 3 is formed at the upper right side of the main body 1, a feed inlet 4 is formed at the middle left side of the main body 1, an air inlet 5 is formed at the lower right side of the main body 1, a discharge port 6 is formed at the bottom of the main body 1, a plurality of fixed rings 7 are fixedly arranged in the interior of the main body 1, a tray 8 is arranged at the upper part of the fixed ring 7, the fixed ring 7 is used for fixing the tray 8 on the main body 1, and the tray 8 is used for providing a contact place for gas-liquid two-phase.

[0044] Specifically, the channel outer end of the gas outlet 2 at the top of the main body 1, the reflux port 3 at the upper right side, the feed inlet 4 at the middle left side, the air inlet 5 at the lower right side and the discharge port 6 at the bottom are all welded and connected with flanges.

[0045] By adopting the above technical solution, the flanges are welded at the channel outer end of the gas outlet 2, the reflux port 3, the feed inlet 4, the air inlet 5 and the discharge port 6, which is more flexible than traditional welding. When the pipeline connected with the main body 1 of the rectifying tower needs to be replaced due to leakage and other accidents, the installation and disassembly can be more convenient while ensuring the sealing effect.

[0046] Specifically, the fixed ring 7 comprises a retainer ring 72 and a cylindrical boss 71, the retainer ring 72 is a three-layer stepped annular structure, the retainer ring 72 is fixed in the interior of the main body 1, and four cylindrical bosses 71 are uniformly distributed on the upper surface of the retainer ring 72 in the circumferential direction.

[0047] Specifically, the tray 8 is a circular stepped structure, the steps of the tray 8 correspond to the steps of the support ring 72, a plurality of sieve holes 81 are arranged on the upper surface and the vertical stepped surface of the tray 8, four fixing holes 82 are uniformly arranged on the upper surface of the tray 8 in the circumferential direction, the cylindrical boss 71 is inserted into the fixing hole 82, a discharge hole 83 is arranged at the edge of the fixing hole 82, a downcomer 85 is arranged at the lower end of the discharge hole 83, and an overflow weir 84 is arranged at the upper edge of the discharge hole 83.

[0048] By adopting the above technical scheme, the support ring 72 can support the tray 8, the support ring 72 and the tray 8 are arranged in a three-step structure, which is different from the common flat tray, the tray 8 in the stepped structure can store more liquid, which is beneficial to the full contact between the gas and the liquid, a plurality of sieve holes 81 are arranged on the upper surface and the vertical stepped surface of the tray 8, which can make more gas contact with the liquid through the sieve holes 81, the cylindrical boss 71 is arranged on the support ring 72, the fixing hole 82 with a size matching that of the cylindrical boss 71 is arranged on the tray 8, and during installation, the tray 8 is only needed to be placed on the fixing ring 7, so that the cylindrical boss 71 is inserted into the fixing hole 82, the overflow weir 84 is arranged, which can temporarily intercept the liquid flowing from the upper plate, maintain a certain liquid height, and make the liquid fully contact with the gas flowing out of the sieve hole 81, and the downcomer 85 is arranged, which can make the liquid of the upper plate flow to the lower plate relatively stably and not splash everywhere to cause pollution.

[0049] Specifically, the lower surface of the tray 8 is arranged in an arc shape.

[0050] By adopting the above technical scheme, the lower surface of the tray 8 is arranged in an arc shape, when the liquid of the lower plate splashes to the bottom of the upper plate along with the gas, the liquid will flow to the tip of the arc surface under the action of gravity, and then drip back to the lower plate, and will not stay on the lower surface of the upper plate to cause pollution.

[0051] Specifically, the size of the upper cross section of the sieve hole 81 is smaller than the size of the lower cross section.

[0052] By adopting the above technical scheme, the sieve hole 81 is designed to have a smaller upper cross section than lower cross section, the liquid on the upper surface is not easy to leak into the lower plate through the sieve hole 81, and according to the Venturi effect, it is known that when the limited flow passes through the reduced flow section, the flow rate of the fluid increases, and the flow rate is inversely proportional to the flow section, so when the gas passes through the sieve hole 81, the sieve hole 81 will increase the flow rate of the gas, so that the liquid is more difficult to leak into the lower plate.

[0053] Specifically, the inner surface of the main body 1 and the outer surface of the tray 8 are coated with an anti-corrosion coating.

[0054] By adopting the technical scheme, the corrosion-resistant coating is coated on the inner surface of the main body 1 and the outer surface of the tray 8, so that the working surfaces of the tray 8 and the main body 1 are well protected, and the service life of the equipment is effectively improved.

[0055] Specifically, the upper surface of the tray 8 is wavy, and the sieve hole 81 is arranged at the protruding part of the upper surface.

[0056] By adopting the technical scheme, the upper surface of the tray 8 is designed to be wavy, the shapes of the two sides of the sieve hole 81 are the same, and the outer surface of the tray has a certain curvature, so that the influence of the entire tray on the external liquid flow rate is low, but due to the height difference between the highest point and the lowest point of the upper surface, part of the difficultly soluble or insoluble solid substances in the liquid can be left in the recess during the liquid flow, and then concentrated cleaning is performed when the machine is stopped.

[0057] Working principle: the feed is added from the feed inlet 4, the liquid in the feed and the liquid from the upper tower section flow together along the tower under the action of gravity, the vapor in the feed and the vapor from the lower tower section flow together along the tower, and the vapor passes through the sieve hole 81 of each layer of tray 8 in turn from bottom to top, under the action of the overflow weir 84, the upper surface of each layer of tray 8 can maintain a certain depth of liquid layer, the gas is dispersed into the liquid layer through the tray 8, and the gas-liquid two phases are countercurrently contacted for mass transfer, the volatile components in the liquid phase enter the gas phase, and the difficultly volatile components in the gas phase enter the liquid phase, the upper cross-sectional size of the sieve hole 81 is smaller than the lower cross-sectional size, which greatly reduces the generation of liquid leakage, the lower surface of the tray 8 is arched, when the liquid of the lower plate splashes to the bottom of the upper plate with the gas, it will flow to the bottom end along the arched surface under the action of gravity, and then drop back to the lower plate, and will not stay on the lower surface of the upper plate to cause pollution, when the upper surface of the tray 8 is designed to be different shapes, different effects of filtering impurities can be generated, the product of the gas outlet 2 is high-purity volatile components, and the product of the tower bottom discharge outlet 6 is high-purity difficultly volatile components.

[0058] Embodiment 2:

[0059] Please refer to Figures 1 to 9 The application provides a technical scheme: a light-removing rectifying tower, which comprises a main body 1, the top of the main body 1 is provided with a gas outlet 2, the upper right side of the main body 1 is provided with a reflux inlet 3, the middle left side of the main body 1 is provided with a feed inlet 4, the lower right side of the main body 1 is provided with an air inlet 5, the bottom of the main body 1 is provided with a discharge outlet 6, a plurality of fixed rings 7 are fixedly arranged in the main body 1, the upper part of each fixed ring 7 is provided with a tray 8, the fixed ring 7 is used for fixing the tray 8 on the main body 1, and the tray 8 is used for providing a contact place for gas-liquid two phases.

[0060] Specifically, the passages of the gas outlet 2 at the top of the main body 1, the reflux inlet 3 at the upper right side of the main body 1, the feed inlet 4 at the middle left side of the main body 1, the air inlet 5 at the lower right side of the main body 1 and the discharge outlet 6 at the bottom of the main body 1 are all welded and connected with flanges.

[0061] By adopting the above technical scheme, the flanges are welded at the outer ends of the passages of the gas outlet 2, the reflux inlet 3, the feed inlet 4, the gas inlet 5 and the discharge outlet 6, which is more flexible than traditional welding, and when the pipeline connected with the rectifying tower body 1 needs to be replaced due to leakage or other accidents, the installation and dismounting can be more convenient while the sealing effect is ensured.

[0062] Specifically, the fixing ring 7 comprises a supporting ring 72 and a cylindrical boss 71, the supporting ring 72 is a three-step annular structure, the supporting ring 72 is fixed in the interior of the body 1, and the upper surface of the supporting ring 72 is uniformly provided with four cylindrical bosses 71 in the circumferential direction.

[0063] Specifically, the tray 8 is a circular stepped structure, the steps of the tray 8 correspond to the steps of the supporting ring 72, a plurality of sieve holes 81 are formed in the upper surface and the vertical step surface of the tray 8, four fixing holes 82 are uniformly formed in the circumferential direction of the upper surface of the tray 8, the cylindrical boss 71 is inserted into the fixing hole 82, a discharge hole 83 is arranged at the edge of the fixing hole 82, a downcomer 85 is arranged at the lower end of the discharge hole 83, and an overflow weir 84 is arranged at the upper edge of the discharge hole 83.

[0064] By adopting the above technical scheme, the supporting ring 72 is arranged to support the tray 8, the supporting ring 72 and the tray 8 are arranged in a three-step structure, which is different from the common planar tray, the stepped tray 8 can store more liquid, which is conducive to the full contact between the gas and the liquid, a plurality of sieve holes 81 are formed in the upper surface and the vertical step surface of the tray 8, which can make more gas contact with the liquid through the sieve holes 81, the cylindrical boss 71 is arranged on the supporting ring 72, the fixing hole 82 with a size matching that of the cylindrical boss 71 is formed in the tray 8, and during installation, the tray 8 is only needed to be placed on the fixing ring 7, and then the cylindrical boss 71 is inserted into the fixing hole 82, the overflow weir 84 is arranged, which can temporarily intercept the liquid flowing down the upper plate, maintain a certain liquid height, and make the liquid fully contact with the gas flowing out of the sieve holes 81, and the downcomer 85 is arranged, which can make the liquid of the upper plate flow to the lower plate more smoothly and not splash everywhere to cause pollution.

[0065] Specifically, the lower surface of the tray 8 is arranged in an arc shape.

[0066] By adopting the above technical scheme, the lower surface of the tray 8 is arranged in an arc shape, when the liquid of the lower plate splashes to the bottom of the upper plate along with the gas, the liquid will flow to the tip of the arc surface under the action of gravity and then drip back to the lower plate, and will not stay on the lower surface of the upper plate to cause pollution.

[0067] Specifically, the size of the upper cross section of the sieve hole 81 is smaller than the size of the lower cross section.

[0068] By adopting the technical scheme, the screen hole 81 is designed to have an upper cross-sectional size smaller than a lower cross-sectional size, so that the liquid on the upper surface is less likely to leak into the lower plate through the screen hole 81, and according to the Venturi effect, it is known that when the limited flow passes through the reduced flow section, the flow rate of the fluid increases, and the flow rate is inversely proportional to the flow section, so that when the gas passes through the screen hole 81, the screen hole 81 can increase the flow rate of the gas, so that the liquid is more difficult to leak to the lower plate.

[0069] Specifically, the inner surface of the main body 1 and the outer surface of the tray 8 are coated with an anti-corrosion coating.

[0070] By adopting the technical scheme, the inner surface of the main body 1 and the outer surface of the tray 8 are coated with an anti-corrosion coating, which can effectively protect the working surfaces of the tray 8 and the main body 1, thereby effectively prolonging the service life of the equipment.

[0071] Specifically, the upper surface of the tray 8 is a trapezoidal boss with the same angle on both sides, and the screen hole 81 is arranged at the top horizontal position of the boss.

[0072] By designing the upper surface of the tray 8 as a trapezoidal boss with the same angle on both sides, since there is no arc transition between the outer surfaces of every two adjacent screen holes 81, when the external liquid flows over the upper surface of the tray 81, the flow rate will decrease to a certain extent, so that the gas-liquid two phases can be more fully contacted, and at the same time, some difficult-to-dissolve or insoluble substances in the liquid can be left in the recess for centralized cleaning when the equipment is stopped.

[0073] Working principle: The feed is added from the feed inlet 4, and the liquid in the feed and the liquid from the upper tower section together descend along the tower under the action of gravity, and the vapor in the feed and the vapor from the lower tower section together ascend along the tower, and pass through the screen holes 81 of the tray 8 in each layer in turn from bottom to top, and under the action of the overflow weir 84, the upper surface of each tray 8 can maintain a certain depth of liquid layer, the gas is dispersed into the liquid layer by the tray 8, and the gas-liquid two phases are countercurrently contacted for mass transfer, the easily volatile components in the liquid phase enter the gas phase, and the difficult-to-volatile components in the gas phase enter the liquid phase, the upper cross-sectional size of the screen hole 81 is smaller than the lower cross-sectional size, which greatly reduces the generation of liquid leakage, the lower surface of the tray 8 is arched, when the liquid of the lower plate splashes to the bottom of the upper plate with the gas, it will flow to the bottom end under the action of gravity along the arched surface, and then drop back to the lower plate, and will not stay on the lower surface of the upper plate to cause pollution, when the upper surface of the tray 8 is designed in different shapes, different effects of filtering impurities can be produced, the product of the gas outlet 2 is high-purity easily volatile components, and the product of the tower bottom discharge outlet 6 is high-purity difficult-to-volatile components.

[0074] Implementation case 3:

[0075] Please refer to Figures 1 to 9The application provides a technical scheme: a light-removing rectifying tower, which comprises a main body 1, an air outlet 2 is arranged at the top of the main body 1, a reflux port 3 is arranged at the upper right side of the main body 1, a feed inlet 4 is arranged at the middle left side of the main body 1, an air inlet 5 is arranged at the lower right side of the main body 1, a discharge outlet 6 is arranged at the bottom of the main body 1, a plurality of fixed rings 7 are fixedly arranged in the main body 1, a tray 8 is arranged at the upper portion of the fixed ring 7, the fixed ring 7 is used for fixing the tray 8 on the main body 1, and the tray 8 is used for providing a contact place for gas-liquid two-phase.

[0076] Specifically, the air outlet 2 at the top of the main body 1, the reflux port 3 at the upper right side of the main body 1, the feed inlet 4 at the middle left side of the main body 1, the air inlet 5 at the lower right side of the main body 1 and the discharge outlet 6 at the bottom of the main body 1 are all welded and connected with flanges at the outer ends of the channels.

[0077] According to the technical scheme, the flanges are welded at the outer ends of the channels of the air outlet 2, the reflux port 3, the feed inlet 4, the air inlet 5 and the discharge outlet 6, so that the flanges are more flexible than traditional welding, and when the pipeline connected with the main body 1 of the rectifying tower needs to be replaced due to leakage and other accidents, the flanges can be conveniently installed and removed while ensuring the sealing effect.

[0078] Specifically, the fixed ring 7 comprises a supporting ring 72 and a cylindrical boss 71, the supporting ring 72 is a three-step annular structure, the supporting ring 72 is fixed in the main body 1, and four cylindrical bosses 71 are uniformly distributed on the upper surface of the supporting ring 72 in the circumferential direction.

[0079] Specifically, the tray 8 is a circular stepped structure, the steps of the tray 8 correspond to the steps of the supporting ring 72, a plurality of sieve holes 81 are arranged on the upper surface and the vertical step surface of the tray 8, four fixing holes 82 are uniformly arranged on the upper surface of the tray 8 in the circumferential direction, the cylindrical boss 71 is inserted into the fixing hole 82, a discharge hole 83 is arranged at the edge of the fixing hole 82, a downcomer 85 is arranged at the lower end of the discharge hole 83, and an overflow weir 84 is arranged at the upper edge of the discharge hole 83.

[0080] By adopting the technical scheme, the supporting ring 72 can support the tray 8, the tray 8 in a three-step structure is different from a common flat tray, the tray 8 in the three-step structure can store more liquid, which is beneficial to the full contact between the gas and the liquid, the plurality of sieve holes 81 are arranged on the upper surface of the tray 8 and the vertical step surface, so that more gas can contact the liquid through the sieve holes 81, the cylindrical boss 71 is arranged on the supporting ring 72, the fixing hole 82 matched with the size of the cylindrical boss 71 is arranged on the tray 8, and when the tray 8 is installed, the cylindrical boss 71 is inserted into the fixing hole 82, the liquid flowing down from the upper tray can be temporarily intercepted by the overflow weir 84, the liquid height is maintained, and the liquid can fully contact the gas passing through the sieve holes 81, and the liquid of the upper tray can flow to the lower tray relatively stably through the liquid downpipe 85, and the pollution phenomenon caused by splashing is avoided.

[0081] Specifically, the lower surface of the tray 8 is in an arc shape.

[0082] By adopting the technical scheme, the lower surface of the tray 8 is in an arc shape, when the liquid of the lower tray splashes to the bottom of the upper tray along with the gas, the liquid can flow to the bottom end along the arc surface under the action of gravity, and then drop back to the lower tray, and the pollution caused by staying on the lower surface of the upper tray is avoided.

[0083] Specifically, the size of the upper cross section of the sieve hole 81 is smaller than the size of the lower cross section.

[0084] By adopting the technical scheme, the size of the upper cross section of the sieve hole 81 is smaller than the size of the lower cross section, the liquid on the upper surface is not easy to leak into the lower tray through the sieve hole 81, and according to the Venturi effect, when the limited flow passes through the reduced flow section, the flow rate of the fluid increases, and the flow rate is inversely proportional to the flow section, so when the gas passes through the sieve hole 81, the sieve hole 81 can increase the flow rate of the gas, so that the liquid is more difficult to leak into the lower tray.

[0085] Specifically, the inner surface of the main body 1 and the outer surface of the tray 8 are coated with an anticorrosive coating.

[0086] By adopting the technical scheme, the inner surface of the main body 1 and the outer surface of the tray 8 are coated with an anticorrosive coating, which can protect the working surfaces of the tray 8 and the main body 1, and effectively prolong the service life of the equipment.

[0087] Specifically, the upper surface of the tray 8 is a straight-angled trapezoidal boss with a slope on one side, and the sieve hole 81 is arranged on the top horizontal part of the boss.

[0088] By designing the upper surface of the tray 8 as a single-sided sloping right-angled trapezoidal boss, when the external liquid flows through the upper surface of the tray 8, the sloping side can reduce the liquid flow rate, so that the gas-liquid two phases can be more fully contacted, and the right-angled side has a greater effect on the liquid flow rate and has a greater hindering effect on the reverse flow of the liquid, which can prevent backflow of the bottom liquid, and at the same time can leave some difficult-to-dissolve or insoluble substances in the recess for centralized cleaning when the machine is stopped.

[0089] Working principle: the feed is added from the feed inlet 4, the liquid in the feed and the liquid from the upper tower section together descend along the tower under the action of gravity, the vapor in the feed and the vapor from the lower tower section together ascend along the tower, and successively pass through the screen holes 81 of each layer of the tray 8 from bottom to top, under the action of the overflow weir 84, the upper surface of each layer of the tray 8 can maintain a certain depth of liquid layer, the gas is dispersed into the liquid layer by the tray 8, the gas-liquid two phases are countercurrently contacted for mass transfer, the volatile components in the liquid phase enter the gas phase, and the difficult-to-volatile components in the gas phase enter the liquid phase, the upper cross-sectional size of the screen hole 81 is smaller than the lower cross-sectional size, which greatly reduces the generation of liquid leakage, the lower surface of the tray 8 is arched, when the liquid of the lower plate is splashed to the bottom of the upper plate with the gas, it will flow to the bottom end along the arched surface under the action of gravity, and then drop back to the lower plate, and will not stay on the lower surface of the upper plate to cause pollution, the upper surface of the tray 8 is designed in different shapes, which can produce different effects of filtering impurities, the product of the gas outlet 2 is a high-purity volatile component, and the product of the tower bottom discharge outlet 6 is a high-purity difficult-to-volatile component.

[0090] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for light ends removal from a light ends removal column, characterized by: The method comprises: feeding the feed from the feed port, the liquid in the feed and the liquid from the upper tower section descending together along the tower under the action of gravity, the vapor in the feed and the vapor from the lower tower section ascending together along the tower, sequentially passing through the sieve holes of each layer of tower plates from bottom to top, the upper surface of each layer of tower plates being capable of maintaining a liquid layer of a certain depth under the action of the overflow weirs, the gas being dispersed into the liquid layer through the tower plates, the gas-liquid two phases countercurrently contacting to perform mass transfer, the easily volatile components in the liquid phase entering the gas phase, the difficult volatile components in the gas phase transferring into the liquid phase, the upper cross-sectional size of the sieve hole being smaller than the size of the lower cross section, reducing the generation of liquid leakage phenomenon, the lower surface of the tower plate being arched, when the liquid of the lower plate splashes to the bottom of the upper plate with the gas, the liquid will flow to the bottom end tip along the arched surface under the action of gravity, and then drip back to the lower plate, without staying on the lower surface of the upper plate to cause pollution; The rectifying tower comprises a main body, a gas outlet is arranged at the top of the main body, a reflux port is arranged at the upper right side of the main body, a feed port is arranged at the middle left side of the main body, an air inlet is arranged at the lower right side of the main body, a discharge port is arranged at the bottom of the main body, a plurality of fixed rings are fixedly arranged in the main body, a tower plate is arranged at the upper part of the fixed ring, and the fixed ring is used for fixing the tower plate on the main body; the tower plate is used for providing a contact place for the gas-liquid two phases. The tower plate is a circular stepped structure, a plurality of sieve holes are arranged on the upper surface of the tower plate and the vertical stepped surface; the upper surface of the tower plate is a straight-angled trapezoidal boss with one side having a slope, and the sieve holes are arranged at the top horizontal part of the boss; by designing the upper surface of the tower plate as a straight-angled trapezoidal boss with one side having a slope, when the external liquid flows through the upper surface of the tower plate, the side with the slope can reduce the liquid flow rate, so that the gas-liquid two phases can be more fully contacted, the straight-angled side has a great influence on the liquid flow rate, has a hindering effect on the reverse flow of the liquid, can prevent the backflow of the bottom liquid, and can also leave some difficult-to-dissolve or insoluble substances in the liquid in the recess for centralized cleaning when the machine is stopped. The fixed ring comprises a supporting ring and a cylindrical boss, the supporting ring is a three-stepped annular structure, the supporting ring is fixed in the main body, and four cylindrical bosses are uniformly distributed on the upper surface of the supporting ring in the circumferential direction. The stepped structure of the tower plate corresponds to the stepped structure of the supporting ring, the upper surface of the tower plate is uniformly provided with four fixing holes in the circumferential direction, the cylindrical boss is inserted into the fixing hole, a discharge hole is arranged at the edge of the fixing hole, a downcomer is arranged at the lower end of the discharge hole, and an overflow weir is arranged at the upper edge of the discharge hole. The lower surface of the tower plate is provided as a continuous arched structure.

2. A method of light ends removal according to claim 1, characterized in that: The outer ends of the channels of the gas outlet at the top of the main body, the reflux port at the upper right side of the main body, the feed port at the middle left side of the main body, the air inlet at the lower right side of the main body and the discharge port at the bottom of the main body are all welded and connected with flanges.

3. The method of claim 1, wherein the method is characterized by: The inner surface of the main body and the outer surface of the tower plate are coated with an anticorrosion coating.

4. The method of claim 1 wherein: The shape of the upper surface of the tower plate is replaced by a wavy shape, and the sieve holes are arranged at the raised parts of the wavy surface.

5. The method of claim 1 wherein: The shape of the upper surface of the tray plate is replaced by a trapezoidal boss with the same angle on both sides instead of a straight trapezoidal boss with slope on one side, and the screen hole is opened at the top level of the boss.

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