Pure phthalic anhydride tower reboiler

Abstract

The utility model discloses a pure phthalic anhydride tower reboiler which comprises a reboiler body, a cleaning unit is movably installed in an inner cavity of the reboiler body, the cleaning unit comprises a moving frame installed in the inner cavity of the reboiler body in a sliding mode and a cleaning frame installed on one side of the moving frame in a rotating mode, and one side of the cleaning frame is movably installed in the moving frame. And a driving unit in the moving frame is used for driving. According to the pure phthalic anhydride tower reboiler, the reciprocating lead screw is driven by the driving device to rotate, the transmission head at the upper end of the moving frame and the reciprocating lead screw are in transmission to drive the moving frame to move towards one side, the cleaning frame on one side is pushed to clean the inner wall of the mounting pipe, and the situation that the volume of the reboiler body is reduced due to condensation of substances such as incrustation on the inner wall of the mounting pipe is avoided; and the pipeline is blocked.

Description

Technical Field

[0001] The utility model belongs to the technical field of reboilers, in particular to a pure phthalic anhydride tower reboiler. Background Art

[0002] Phthalic anhydride, also known as phthalic anhydride (abbreviated as PA), appears as a white, scaly solid or powder, or white, needle-shaped crystals with a slight odor. It sublimes easily and is slightly soluble in cold water, readily soluble in hot water and hydrolyzed to phthalic acid. It is soluble in ethanol, benzene, and pyridine, and slightly soluble in ether. The production of phthalic anhydride requires a phthalic anhydride column, of which the reboiler is a key component. As the name suggests, the reboiler vaporizes the liquid again. Its structure is similar to that of a condenser, except that one is used to reduce temperature, while the reboiler heats and vaporizes. The material expands and even vaporizes due to the heat in the reboiler, reducing its density. This causes the material to leave the vaporization chamber and smoothly return to the column. The gas and liquid phases return to the column, with the gas phase rising through the trays while the liquid phase falls to the bottom. Due to the static pressure difference, the liquid level at the bottom of the column is continuously replenished by the evaporated portion.

[0003] However, when the reboiler is in use, if solid matter such as scale condenses on the inner wall, it is easy to adhere to the tube wall, causing the internal volume of the reboiler to decrease, affecting normal use, and easily corroding the inner wall of the pipe, making cleaning more inconvenient. Utility Model Content

[0004] The utility model aims to provide a pure phthalic anhydride column reboiler to solve the technical problems raised in the background technology.

[0005] To achieve the above-mentioned object, the specific technical solution of the present invention is as follows: A pure phthalic anhydride column reboiler comprises a reboiler body, wherein a cleaning unit is movably installed in the inner cavity of the reboiler body;

[0006] The cleaning unit includes a moving frame slidably mounted in the inner cavity of the reboiler body and a cleaning frame rotatably mounted on one side of the moving frame. One side of the cleaning frame is movably mounted inside the moving frame and is driven by a driving unit inside the moving frame.

[0007] Preferably, the reboiler body includes a mounting tube installed in the middle of the reboiler body and a reciprocating screw movably installed at the upper end of the mounting tube, and the reciprocating screw is installed through the cleaning unit.

[0008] Preferably, both ends of the reciprocating screw are installed in the limit groove provided at the upper end of the mounting tube through bearings, one end of the reciprocating screw is connected to the output end of the driving motor, and a transmission head is fixedly installed at the upper end of the movable frame. The reciprocating screw is arranged through the transmission head and is installed to match the transmission head, and the limit groove matches the size of the transmission head.

[0009] Preferably, the cleaning rack includes a support ring and a cleaning brush fixedly mounted on the outside of the support ring, and the cleaning brush is mounted in contact with the inner wall of the mounting tube.

[0010] Preferably, the support ring is fixedly provided with an inclined scraper on the outside. The inclined scrapers are arranged in multiple groups and are evenly distributed on the outer ring surface of the support ring. The outer edges of the inclined scrapers are arranged in contact with the inner wall of the mounting tube.

[0011] Preferably, a driving gear ring is fixedly mounted on one side of the support ring, and the driving gear ring is rotatably mounted inside the movable frame and is driven to rotate by a driving unit.

[0012] Preferably, the driving unit includes a driving gear meshedly installed on one side of the driving gear ring and a first bevel gear fixedly installed on one side of the driving gear. The connection between the driving gear and the first bevel gear is installed and fixed through a bearing. A second bevel gear is meshedly installed on one side of the first bevel gear. One side of the first bevel gear is fixedly connected to a rotating gear installed on the outside of the mobile frame. The rotating gear meshes with fixed racks fixedly installed on both sides of the upper end of the inner wall of the mounting tube for transmission.

[0013] The utility model of a pure phthalic anhydride tower reboiler has the following advantages:

[0014] 1. This pure phthalic anhydride tower reboiler, after the reboiler body has been used for a period of time, the driving device can be started to drive the reciprocating screw to rotate, and the transmission head at the upper end of the movable frame and the reciprocating screw drive drive the movable frame to move to one side, pushing the cleaning frame on one side to clean the inner wall of the installation pipe, so as to avoid the condensation of scale and other substances on the inner wall of the installation pipe, resulting in the reduction of the volume of the reboiler body and the blockage of the pipeline.

[0015] 2. In this pure phthalic anhydride tower reboiler, when the mobile frame moves, the rotating gear meshes with the fixed rack for transmission, the rotating gear rotates, and then the second bevel gear fixed on one side drives the first bevel gear on one side to rotate, and the driving gear drives the driving gear ring to rotate. When moving for cleaning, the cleaning brush brushes the inner wall to improve the cleaning effect, and inclined scrapers are evenly arranged on the upper end of the support ring to brush away dirt on the inner wall that is inconvenient to brush, making the cleaning more thorough. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the reboiler body structure of the utility model;

[0019] Figure 3 This is a schematic structural diagram of the cleaning unit of the present utility model;

[0020] Figure 4 This is a schematic structural diagram of the cleaning rack of the present utility model;

[0021] Figure 5 For the utility model Figure 4 A in the middle is an enlarged structural diagram;

[0022] Explanation of the marks in the figure: 100, reboiler body; 110, mounting tube; 120, reciprocating screw; 130, limiting groove; 140, fixed rack; 200, cleaning unit; 210, moving frame; 211, transmission head; 220, cleaning frame; 221, support ring; 222, cleaning brush; 223, driving gear ring; 224, inclined scraper; 230, driving unit; 231, driving gear; 232, first bevel gear; 233, second bevel gear; 234, rotating gear. DETAILED DESCRIPTION

[0023] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0024] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0026] In the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0027] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0028] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of a pure phthalic anhydride column reboiler of the present invention in conjunction with the accompanying drawings.

[0029] like Figure 1-5 As shown, a pure phthalic anhydride column reboiler of the present invention comprises a reboiler body 100 , and a cleaning unit 200 is movably installed in the inner cavity of the reboiler body 100 .

[0030] The reboiler body 100 includes a mounting pipe 110 installed in the middle of the reboiler body 100 and a reciprocating screw 120 movably installed at the upper end of the mounting pipe 110 . The reciprocating screw 120 is installed through the cleaning unit 200 .

[0031] The cleaning unit 200 includes a movable frame 210 slidably mounted in the inner cavity of the reboiler body 100 and a cleaning frame 220 rotatably mounted on one side of the movable frame 210 . One side of the cleaning frame 220 is movably mounted inside the movable frame 210 and is driven by a driving unit 230 inside the movable frame 210 .

[0032] The cleaning frame 220 includes a support ring 221 and a cleaning brush 222 fixedly mounted on the outside of the support ring 221 . The cleaning brush 222 is mounted in contact with the inner wall of the mounting tube 110 .

[0033] Both ends of the reciprocating screw rod 120 are installed in the limiting groove 130 set at the upper end of the mounting tube 110 through bearings. One end of the reciprocating screw rod 120 is connected to the output end of the driving motor. The upper end of the movable frame 210 is fixedly installed with a transmission head 211. The reciprocating screw rod 120 is arranged through the transmission head 211 and is installed to match each other. The limiting groove 130 matches the size of the transmission head 211.

[0034] After the reboiler body 100 has been used for a period of time, the driving device can be started to drive the reciprocating screw 120 to rotate. The transmission head 211 at the upper end of the movable frame 210 and the reciprocating screw 120 drive the movable frame 210 to move to one side, pushing the cleaning frame 220 on one side to clean the inner wall of the installation pipe 110, so as to prevent the condensation of scale and other substances on the inner wall of the installation pipe 110 from causing the volume of the reboiler body 100 to decrease, thereby clogging the pipeline, etc.

[0035] A driving gear ring 223 is fixedly installed on one side of the support ring 221. The driving gear ring 223 is rotatably installed inside the mobile frame 210 and is driven to rotate by the driving unit 230. An inclined scraper 224 is fixedly installed on the outside of the support ring 221. The inclined scrapers 224 are arranged in multiple groups and are evenly distributed on the outer ring surface of the support ring 221. The outer edge of the inclined scraper 224 is arranged in contact with the inner wall of the mounting tube 110.

[0036] The driving unit 230 includes a driving gear 231 meshedly installed on one side of the driving gear ring 223 and a first bevel gear 232 fixedly installed on one side of the driving gear 231. The connection between the driving gear 231 and the first bevel gear 232 is fixed by a bearing. A second bevel gear 233 is meshedly installed on one side of the first bevel gear 232. One side of the first bevel gear 232 is fixedly connected to a rotating gear 234 installed on the outside of the mobile frame 210. The rotating gear 234 meshes with the fixed racks 140 fixedly installed on both sides of the upper end of the inner wall of the mounting tube 110 for transmission.

[0037] When the movable frame 210 moves, the rotating gear 234 engages with the fixed rack 140 for transmission, and the rotating gear 234 rotates, and then the second bevel gear 233 fixedly installed on one side drives the first bevel gear 232 on one side to rotate, and the driving gear ring 223 is driven to rotate through the driving gear 231. When moving for cleaning, the cleaning brush 222 brushes the inner wall to improve the cleaning effect, and inclined scrapers 224 are evenly arranged on the upper end of the support ring 221 to brush away dirt on the inner wall that is inconvenient to brush, making the cleaning more thorough.

[0038] The working principle of the pure phthalic anhydride tower reboiler is as follows: after the reboiler body 100 has been used for a period of time, the driving device can be started to drive the reciprocating screw 120 to rotate, and the transmission head 211 at the upper end of the movable frame 210 and the reciprocating screw 120 drive the movable frame 210 to move to one side, pushing the cleaning frame 220 on one side to clean the inner wall of the installation pipe 110, so as to prevent the inner wall of the installation pipe 110 from being condensed due to scale and other substances, resulting in the volume of the reboiler body 100 becoming smaller and the pipeline being blocked. When the cleaning brush 222 moves, it engages with the fixed rack 140 for transmission. The rotating gear 234 rotates, and then the second bevel gear 233 fixed on one side drives the first bevel gear 232 on one side to rotate, and the driving gear ring 223 is driven to rotate through the driving gear 231. When the cleaning brush 222 moves to clean, it brushes the inner wall to improve the cleaning effect. In addition, inclined scrapers 224 are evenly arranged on the upper end of the support ring 221 to brush away dirt on the inner wall that is inconvenient to brush, so that the cleaning is more thorough.

[0039] It is understood that the present invention is described by way of certain embodiments, and those skilled in the art will appreciate that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. Furthermore, under the guidance of the present invention, these features and embodiments may be modified to suit specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A pure phthalic anhydride column reboiler, comprising a reboiler body (100), characterized in that: A cleaning unit (200) is movably installed in the inner cavity of the reboiler body (100); The cleaning unit (200) comprises a movable frame (210) slidably mounted in the inner cavity of the reboiler body (100) and a cleaning frame (220) rotatably mounted on one side of the movable frame (210); one side of the cleaning frame (220) is movably mounted inside the movable frame (210) and driven by a driving unit (230) inside the movable frame (210).

2. A pure phthalic anhydride column reboiler according to claim 1, characterized in that: The reboiler body (100) comprises a mounting tube (110) mounted in the middle of the reboiler body (100) and a reciprocating screw (120) movably mounted on the upper end of the mounting tube (110); the reciprocating screw (120) is installed through the cleaning unit (200).

3. A pure phthalic anhydride column reboiler according to claim 2, characterized in that: Both ends of the reciprocating screw rod (120) are mounted inside a limiting groove (130) provided at the upper end of the mounting tube (110) via bearings; one end of the reciprocating screw rod (120) is connected to the output end of the driving motor; a transmission head (211) is fixedly mounted on the upper end of the movable frame (210); the reciprocating screw rod (120) passes through the transmission head (211) and is mounted in a matching manner with the transmission head (211); and the limiting groove (130) and the transmission head (211) are matched in size.

4. A pure phthalic anhydride column reboiler according to claim 3, characterized in that: The cleaning frame (220) comprises a support ring (221) and a cleaning brush (222) fixedly mounted on the outside of the support ring (221), wherein the cleaning brush (222) is mounted in contact with the inner wall of the mounting tube (110).

5. A pure phthalic anhydride column reboiler according to claim 4, characterized in that: The support ring (221) is fixedly provided with an inclined scraper (224) on the outside. The inclined scrapers (224) are arranged in multiple groups and are evenly distributed on the outer surface of the support ring (221). The outer edges of the inclined scrapers (224) are arranged in contact with the inner wall of the mounting tube (110).

6. A pure phthalic anhydride column reboiler according to claim 5, characterized in that: A driving gear ring (223) is fixedly mounted on one side of the support ring (221). The driving gear ring (223) is rotatably mounted inside the moving frame (210) and is driven to rotate by a driving unit (230).

7. A pure phthalic anhydride column reboiler according to claim 6, characterized in that: The driving unit (230) comprises a driving gear (231) meshedly mounted on one side of a driving gear ring (223) and a first bevel gear (232) fixedly mounted on one side of the driving gear (231); a connection between the driving gear (231) and the first bevel gear (232) is fixedly mounted via a bearing; a second bevel gear (233) is meshedly mounted on one side of the first bevel gear (232); one side of the first bevel gear (232) is fixedly connected to a rotating gear (234) mounted on the outside of the mobile frame (210); and the rotating gear (234) is meshedly driven with fixed racks (140) fixedly mounted on both sides of the upper end of the inner wall of the mounting tube (110).

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