A propane separation tower tray installation method for a propane dehydrogenation process

Abstract

The present invention discloses a method for installing a propane separation tower tray in a propane dehydrogenation process, comprising the following steps: step S1, installing a support beam; placing the propane separation tower horizontally, transporting the support beam into the tower, and installing the support beam; step S2, checking the levelness of the tray support ring; checking the levelness of the tray support ring in the propane separation tower, and if it meets the standard, proceeding to step S3; if it does not meet the standard, adjusting it until the levelness meets the standard; step S3, preparing for tray installation; and step S4, installing the tray. The present invention adopts a method of adjusting the support beam installation until the tower is flat on the ground for installation, and then performing other installation steps. Compared with the traditional tray installation method, the construction method of the present invention has a fast construction speed, low operating difficulty, and good safety. It can play a very good role in promoting the construction of the entire tray.

Description

Technical Field

[0001] The present invention relates to the field of propane separation tower tray installation in a propane dehydrogenation process, and more specifically, to a method for installing a propane separation tower tray in a propane dehydrogenation process. Background Art

[0002] The installation of propane splitter trays in the propane dehydrogenation process is a core process for the entire propane dehydrogenation propane splitter. Traditional tray installation methods, which require vertical work, limit the working space, and reduce safety factors, make the construction difficult, require significant investment in safety measures, and prolong the construction period. Therefore, it is necessary to research and develop new methods for the installation of propane splitter trays in the propane dehydrogenation process to meet the needs of chemical projects. Summary of the Invention

[0003] In order to achieve these objectives and other advantages according to the present invention, a method for installing propane separation tower trays in a propane dehydrogenation process is provided, comprising the following steps:

[0004] Step S1, support beam installation;

[0005] The propane separation tower is placed horizontally, the support beam is transported into the tower, and the support beam is installed;

[0006] Step S2, checking the horizontality of the tower tray support ring;

[0007] Performing a level check on the tray support ring in the propane separation tower. If the level meets the standard, proceed to step S3. If the level does not meet the standard, adjust the tray support ring until the level meets the standard.

[0008] Step S3, preparation before tower tray installation;

[0009] Step S4: tower tray installation.

[0010] According to a preferred embodiment of the present invention, the propane separation tower tray installation method of the propane dehydrogenation process, the step S1 specifically includes the following steps:

[0011] Step S11: Place the propane separation tower horizontally, open all inlets and the top nozzle on the propane separation tower, replace the air in the tower, and test the air in the tower;

[0012] Step S12: After the air quality test confirms that it meets the requirements, a scaffolding and a support beam roller are installed in the propane separation tower, and the support beam roller is bolted to the inner wall of the tower;

[0013] Step S13: transporting a support beam from the top nozzle of the propane separation tower into the tower, and the support beam is mounted on the support beam roller during transportation, and the support beam is driven by the rotation of the support beam roller. The support beam is not parallel to the tower axis of the propane separation tower, and the scaffolding is parallel to the support beam;

[0014] Step S14: After the support beam is transported to a preset position, the support beam is preliminarily installed and fixed;

[0015] Step S15: After the support beams are installed, the propane separation tower is erected and the support beams are aligned.

[0016] According to a preferred embodiment of the present invention, in the propane dehydrogenation process propane separation tower tray installation method, step S2 specifically includes the following steps:

[0017] Step S21: Before installing the tower tray, install the tower tray support ring in an annular shape on the inner wall of the propane separation tower, and check that the tower tray support ring is within the allowable deviation of the tower accessory drawing. The difference between the high and low points of the tower tray support ring must not exceed 3.5 mm, and the upper surface of the tower tray support ring is flat and free of burrs, welding slag, and burrs.

[0018] Step S22: Use an optical level or a laser level to detect whether the tower tray support ring is level. During measurement, the optical level or the laser level is fixed on a bracket, and the bracket is also installed on the tower tray support ring. The lower end of the scale is placed on the point to be measured on the tower tray support ring. The difference in readings at each measuring point is the level deviation value.

[0019] Step S23: If the level deviation value of each measured point is within the tolerance range, proceed to step S3; if the level deviation value of a certain measured point is not within the tolerance range, perform local adjustments on the tower plate support ring until the level deviation value of the measured point is within the tolerance range.

[0020] According to a preferred embodiment of the present invention, in the propane dehydrogenation process propane separation tower tray installation method, in the step S23, the tray support ring is locally adjusted, specifically including the following operations: using a crowbar or a hammer to adjust the horizontality of the tray support ring; if the tray support ring exceeds a preset thickness or a preset hardness, the tray support ring can be roasted with fire.

[0021] According to a preferred embodiment of the present invention, in the propane dehydrogenation process propane separation tower tray installation method, step S3 specifically includes the following steps:

[0022] Step S31: pre-assemble a complete tower tray on the ground so that workers can be familiar with the layout of the tower tray and the positions of various components on the tower tray;

[0023] Step S32: A working platform is provided at or below each entry hole in the tower, and a lifting device is provided on each working platform;

[0024] Step S33: prepare the distance pipe between two adjacent downcomers in advance.

[0025] According to a preferred embodiment of the present invention, in the propane dehydrogenation process propane separation tower tray installation method, in step S4, first install the bottom tray in the tower, and then install it layer by layer upward until the top, completing the installation of all trays; wherein, the installation process of each tray is as follows:

[0026] Step S41: First, install downcomers. Multiple downcomers are horizontally installed in parallel on each tower tray. Both ends of each downcomer are fixed to the tower inner wall. The downcomers are installed from the center to the sides. The two middle downcomers are positioned equidistantly based on the centerline of the separation tower. The distance between the two middle downcomers and the centerline of the separation tower is consistent, which is L. The spacing between adjacent downcomers is also L.

[0027] Step S42: vertically install a distance pipe between two adjacent downcomers in sequence, wherein the distance pipe has a length of L;

[0028] Step S43: Each tower tray is composed of multiple tower tray plates. After the downcomers are installed, corresponding tower tray plates are installed between two adjacent downcomers, and each tower tray plate is clamped in the tower tray support ring;

[0029] Step S44: After all the tower plates are installed, that's it.

[0030] The present invention includes at least the following beneficial effects: the present invention adopts a method of adjusting the support beam installation to the tower lying flat on the ground for installation, and then installing other links. Compared with the traditional tower tray installation method, the construction method of the present invention reduces the time of closed and high-altitude operations, improves construction efficiency, and safety is also correspondingly improved, which can play a good promoting role in the construction of the entire tower tray.

[0031] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the installation and use of the optical level or laser level in the present invention. DETAILED DESCRIPTION

[0033] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0034] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are for illustrative purposes only, and those skilled in the art will readily appreciate other obvious variations. The basic principles of the present invention defined in the following description may be applied to other embodiments, variations, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the present invention.

[0035] Those skilled in the art should understand that, in the disclosure of the present invention, the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be understood as limiting the present invention.

[0036] It is to be understood that the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the elements may be multiple, and the term "one" should not be understood as a limitation on the quantity.

[0037] like Figure 1 As shown, a method for installing a propane separation tower tray in a propane dehydrogenation process includes the following steps:

[0038] Step S1, support beam installation;

[0039] The propane separation tower is placed horizontally, and the support beams are transported into the tower and installed; support beam rollers and scaffolding are also required to be installed.

[0040] Step S2, checking the horizontality of the tower tray support ring;

[0041] Performing a level check on the tray support ring in the propane separation tower. If the level meets the standard, proceed to step S3. If the level does not meet the standard, adjust the tray support ring until the level meets the standard.

[0042] Step S3, preparation before tower tray installation;

[0043] Step S4: tower tray installation.

[0044] In the above-mentioned implementation scheme, the installation of the support beams is carried out by adjusting the support beams so that the tower is laid flat on the ground, and then carrying out the installation of other links. The speed of installing the support beams on the ground is 10 to 15 beams per day, and the installation cycle of the scaffolding and rollers is 5 to 7 days. In an implementation project of the present invention, there are 108 support beams, and the total installation time does not exceed 20 days. In contrast, the traditional construction method is to install the support beams after the tower is erected. Usually, the propane separation tower is installed with four or five layers of support beams, and each time a layer of support beams is completed, the installation of the remaining components such as the supporting tower plates is completed. After the installation of each layer of tower plates is completed and accepted, the subsequent support beams are installed. The entire support beam installation cycle is about 90 to 120 days. Compared with the two construction methods, the new construction method has a fast construction speed, low operating difficulty, and good safety. It can play a very good promoting role in the construction of the entire tower plate.

[0045] According to a preferred embodiment of the present invention, the propane separation tower tray installation method of the propane dehydrogenation process, the step S1 specifically includes the following steps:

[0046] Step S11: Place the propane separation tower horizontally, open all inlets and the top nozzle on the propane separation tower, replace the air in the tower, and test the air in the tower;

[0047] Step S12: After the air quality test confirms that it meets the requirements, a scaffolding and a support beam roller are installed in the propane separation tower, and the support beam roller is bolted to the inner wall of the tower;

[0048] Step S13: transporting a support beam from the top nozzle of the propane separation tower into the tower, and the support beam is mounted on the support beam roller during transportation, and the support beam is driven by the rotation of the support beam roller. The support beam is not parallel to the tower axis of the propane separation tower, and the scaffolding is parallel to the support beam;

[0049] Step S14: After the support beam is transported to a preset position, the support beam is preliminarily installed and fixed;

[0050] Step S15: After the support beams are installed, the propane separation tower is erected and the support beams are aligned.

[0051] Each support beam weighs 2 tons and can be transported into the tower through the side entrance or through the top equipment port, depending on the specific difficulty of the operation. Considering that if the site is small, the support beam can be transported into the tower through the top equipment port. Once inside the tower, the support beam is normally not installed horizontally but at a certain angle. When setting up the scaffolding, the installation space and the difficulty of installing the support beam need to be considered.

[0052] Welding of the equipment body inside the tower is prohibited, so the support beam roller can be designed to be bolted and fixed on the bolt holes of the support ring.

[0053] According to a preferred embodiment of the present invention, in the propane dehydrogenation process propane separation tower tray installation method, step S2 specifically includes the following steps:

[0054] Step S21: Before installing the tray, install the tray support ring 1 in an annular shape on the inner wall of the propane separation tower 2, and check that the tray support ring is within the allowable deviation of the tower accessory drawing. The difference between the high and low points of the tray support ring must not exceed 3.5 mm, and the upper surface of the tray support ring is flat and free of burrs, welding slag, and burrs.

[0055] Step S22: Use an optical level 3 or a laser level to detect whether the tower tray support ring 1 is horizontal. During measurement, the optical level 3 or the laser level is fixed on a bracket 4, and the bracket 4 is also installed on the tower tray support ring 1. The lower end of the scale 5 is placed on the point to be measured on the tower tray support ring 1. The difference in readings at each measuring point is the horizontality deviation value;

[0056] The bracket should be arranged in a position that does not affect the monitoring of the monitoring point by the optical level or the laser level. If obstruction occurs when the monitoring point is changed, the position of the bracket needs to be adjusted.

[0057] Step S23: If the level deviation value of each measured point is within the tolerance range, proceed to step S3; if the level deviation value of a certain measured point is not within the tolerance range, perform local adjustments on the tower plate support ring until the level deviation value of the measured point is within the tolerance range.

[0058] According to a preferred embodiment of the present invention, in the propane dehydrogenation process propane separation tower tray installation method, in the step S23, the tray support ring is locally adjusted, specifically including the following operations: using a crowbar or a hammer to adjust the horizontality of the tray support ring; if the tray support ring exceeds a preset thickness or a preset hardness, the tray support ring can be roasted with fire.

[0059] Sometimes there is a large gap between the tower plate support ring and the inner wall of the tower plate. In this case, a gasket is needed to fill the gap between the two.

[0060] According to a preferred embodiment of the present invention, in the propane dehydrogenation process propane separation tower tray installation method, step S3 specifically includes the following steps:

[0061] Step S31: pre-assemble a complete tower tray on the ground so that workers can be familiar with the layout of the tower tray and the positions of various components on the tower tray;

[0062] Step S32: A working platform is provided at or below each entry hole in the tower, and a lifting device is provided on each working platform;

[0063] The working platform is set up to facilitate the safe entry and exit of workers. Lifting equipment, which can be hoisting equipment, is set up on the working platform, so that the equipment in the tower and the tower tray components can be lifted and lowered to the working position.

[0064] Step S33: Prepare the distance pipe between two adjacent downcomers in advance, so as to facilitate the control of the distance between the two adjacent downcomers.

[0065] According to a preferred embodiment of the present invention, in the propane dehydrogenation process propane separation tower tray installation method, in step S4, first install the bottom tray in the tower, and then install it layer by layer upward until the top, completing the installation of all trays; wherein, the installation process of each tray is as follows:

[0066] Step S41: First, install downcomers. Multiple downcomers are horizontally installed in parallel on each tower tray. Both ends of each downcomer are fixed to the tower inner wall. The downcomers are installed from the center to the sides. The two middle downcomers are positioned equidistantly based on the centerline of the separation tower. The distance between the two middle downcomers and the centerline of the separation tower is consistent, which is L. The spacing between adjacent downcomers is also L.

[0067] Step S42: vertically install a distance pipe between two adjacent downcomers in sequence, wherein the distance pipe has a length of L;

[0068] Step S43: Each tower tray is composed of multiple tower tray plates. After the downcomers are installed, corresponding tower tray plates are installed between two adjacent downcomers, and each tower tray plate is clamped in the tower tray support ring;

[0069] Step S44: After all the tower plates are installed, that's it.

[0070] It should be noted that if the inner wall of the tower is severely corroded, the rust must be removed before the tower plate can be installed.

[0071] Compared with the traditional technology, this embodiment does not require repeated precise measurement and adjustment in subsequent work as long as the tower plate support ring is adjusted properly.

[0072] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. A propane separation tower tray installation method for a propane dehydrogenation process, characterized in that: The following steps are involved: Step S1, support beam installation; The propane separation tower is placed horizontally, the support beam is transported into the tower, and the support beam is installed; Step S2, checking the horizontality of the tower tray support ring; Performing a level check on the tray support ring in the propane separation tower. If the level meets the standard, proceed to step S3. If the level does not meet the standard, adjust the tray support ring until the level meets the standard. Step S3, preparation before tower tray installation; Step S4, tower tray installation; The step S1 specifically includes the following steps: Step S11: Place the propane separation tower horizontally, open all inlets and the top nozzle on the propane separation tower, replace the air in the tower, and test the air in the tower; Step S12: After the air quality test confirms that it meets the requirements, a scaffolding and a support beam roller are installed in the propane separation tower, and the support beam roller is bolted to the inner wall of the tower; Step S13: transporting a support beam from the top nozzle of the propane separation tower into the tower, and the support beam is mounted on the support beam roller during transportation, and the support beam is driven by the rotation of the support beam roller. The support beam is not parallel to the tower axis of the propane separation tower, and the scaffolding is parallel to the support beam; Step S14: After the support beam is transported to a preset position, the support beam is preliminarily installed and fixed; Step S15: After the support beams are installed, the propane separation tower is erected and the support beams are aligned; In step S4, first install the bottom tray in the tower, then install it layer by layer upward until the top, and complete the installation of all trays; wherein, the installation process of each tray is as follows: Step S41: First, install downcomers. Multiple downcomers are horizontally installed in parallel on each tower tray. Both ends of each downcomer are fixed to the tower inner wall. The downcomers are installed from the center to the sides. The two middle downcomers are positioned equidistantly based on the centerline of the separation tower. The distance between the two middle downcomers and the centerline of the separation tower is consistent, which is L. The spacing between adjacent downcomers is also L. Step S42: vertically install a distance pipe between two adjacent downcomers in sequence, wherein the distance pipe has a length of L; Step S43: Each tower tray is composed of multiple tower tray plates. After the downcomers are installed, corresponding tower tray plates are installed between two adjacent downcomers, and each tower tray plate is clamped in the tower tray support ring; Step S44: After all the tower plates are installed, that's it.

2. The propane separation tower tray installation method for a propane dehydrogenation process according to claim 1, characterized in that: The step S2 specifically includes the following steps: Step S21: Before installing the tray, install the tray support ring in an annular shape on the inner wall of the propane separation tower. Check that the tray support ring is within the allowable deviation specified in the tower accessory drawing. The difference between the highest and lowest points of the tray support ring must not exceed 3.5 mm. The upper surface of the tray support ring must be flat and free of burrs, welding slag, and burrs. Step S22: Use an optical level or a laser level to detect whether the tower tray support ring is level. During measurement, the optical level or the laser level is fixed on a bracket, and the bracket is also installed on the tower tray support ring. The lower end of the scale is placed on the point to be measured on the tower tray support ring. The difference in readings at each measuring point is the level deviation value. Step S23: If the level deviation value of each measured point is within the tolerance range, proceed to step S3; if the level deviation value of a certain measured point is not within the tolerance range, perform local adjustments on the tower plate support ring until the level deviation value of the measured point is within the tolerance range.

3. The propane separation tower tray installation method for a propane dehydrogenation process according to claim 2, characterized in that: In step S23, the tower tray support ring is partially adjusted, specifically including the following operations: using a crowbar or a hammer to adjust the horizontality of the tower tray support ring; if the tower tray support ring exceeds a preset thickness or a preset hardness, the tower tray support ring can be roasted with fire.

4. The propane separation tower tray installation method for a propane dehydrogenation process according to claim 2, characterized in that: The step S3 specifically includes the following steps: Step S31: pre-assemble a complete tower tray on the ground so that workers can be familiar with the layout of the tower tray and the positions of various components on the tower tray; Step S32: A working platform is provided at or below each entry hole in the tower, and a lifting device is provided on each working platform; Step S33: prepare the distance pipe between two adjacent downcomers in advance.

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