Gas cooler for phthalic anhydride production

Abstract

The embodiment of the invention discloses a gas cooler for phthalic anhydride production, and relates to the technical field of phthalic anhydride production. The gas cooler for phthalic anhydride production comprises a shell assembly, a gas inlet, a gas outlet, a water inlet, a water outlet, a pipeline and a rotary spiral brush cleaning assembly, the shell assembly is provided with a containing space, the pipeline is installed in the containing space, the gas inlet and the gas outlet are both installed in the shell assembly and communicated with the pipeline, and the rotary spiral brush cleaning assembly is installed in the containing space. The water inlet and the water outlet are both formed in the shell assembly and communicate with the containing space, and the rotary spiral brush cleaning assembly is installed on the pipeline and used for cleaning the pipeline, so that the cooler can be automatically cleaned, heat dissipation fins cannot be corroded, convenience and rapidness are achieved, and the cleaning efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of phthalic anhydride production, and in particular to a gas cooler for phthalic anhydride production. Background Art

[0002] Phthalic anhydride, also known as phthalic anhydride, is currently widely used in the chemical, pharmaceutical and fine chemical industries. The cooling of phthalic anhydride gas is an important production process. When cooling phthalic anhydride gas, a gas cooler suitable for phthalic anhydride is needed. The existing coolers are divided into coil type and fin type. During use, because part of the phthalic anhydride will adhere to the coil or fin, it will corrode the coil or fin, so the cooler needs to be cleaned regularly. The current cleaning is not convenient to disassemble, resulting in inconvenience in cleaning and affecting the cleaning efficiency. Summary of the invention

[0003] Based on this, it is necessary to provide a gas cooler for phthalic anhydride production, which aims to solve the problem that the existing coolers are divided into coil type and fin type. During use, because part of the phthalic anhydride will adhere to the coil or fin, which will corrode the coil or fin, the cooler needs to be cleaned regularly. The current cleaning is not convenient for disassembly, resulting in inconvenience in cleaning and affecting the technical problem of cleaning efficiency.

[0004] The present invention provides a gas cooler for phthalic anhydride production, which comprises a shell component, an air inlet, an air outlet, a water inlet, a water outlet, a pipeline and a rotating spiral brush cleaning component. The shell component is provided with an accommodating space, the pipeline is installed in the accommodating space, the air inlet and the air outlet are both installed on the shell component and are respectively connected to the pipeline, the water inlet and the water outlet are both installed on the shell component and are respectively connected to the accommodating space, and the rotating spiral brush cleaning component is installed on the pipeline and is used to clean the pipeline.

[0005] In one embodiment, the gas cooler for phthalic anhydride production also includes cooling fins and copper sheets connected to the cooling fins, the pipe is provided with a spiral groove, the groove wall of the spiral groove is provided with an opening connected to the interior of the pipe, the copper sheet is spirally inserted into the opening and partially arranged in the pipe, the rotary spiral brush cleaning assembly includes a coil, a mounting part, a mounting shaft, a magnetic core and a cleaning part, the coil surrounds the pipe, the mounting part is installed on the pipe wall, the mounting shaft is connected to the mounting part and passes through the magnetic core, and the magnetic core is connected to the cleaning part.

[0006] In one embodiment, the cleaning piece includes a connecting rod, and a first brush head and a second brush head connected to the connecting rod, the first brush head is used to brush off the phthalic anhydride on the copper sheet, and the second brush head is used to brush off the phthalic anhydride on the groove wall in the pipe, and to brush off the phthalic anhydride on the inner wall of the pipe.

[0007] In one embodiment, the gas cooler for phthalic anhydride production further comprises a sealing member, which is installed in the groove and used for sealing the connection between the opening and the copper sheet.

[0008] In one embodiment, the shell assembly includes an upper cover, a shell and a base, and the upper cover, the shell and the base are arranged to form the accommodating space.

[0009] In one embodiment, the upper cover is detachably connected to the shell.

[0010] In one of the embodiments, the upper cover is provided with an air inlet channel and an air outlet channel, the upper cover is provided with a first flow channel, the base is provided with a second flow channel, the pipeline is connected with the first flow channel and the second flow channel through a sealing sheet, the air inlet channel is connected with the air outlet channel through the first flow channel, the pipeline, and the second flow channel, the air inlet is connected with the air inlet channel, the air outlet is connected with the air outlet channel, and the inner diameter of the first flow channel is larger than the inner diameter of the second flow channel.

[0011] In one embodiment, the base is further provided with a discharge channel connected to the second flow channel, and the phthalic anhydride and phthalic anhydride liquid brushed out of the pipeline flow into the discharge channel through the second flow channel.

[0012] In one embodiment, the gas cooler for phthalic anhydride production further includes a control valve, which is installed on the base and communicated with the discharge channel.

[0013] In one embodiment, the water inlet and the water outlet are both installed on the shell, and the height of the water inlet is higher than the height of the water outlet, or the height of the water inlet is lower than the height of the water outlet.

[0014] Implementing the embodiments of the present invention will have the following beneficial effects: The gas cooler for phthalic anhydride production of the present invention is adopted. The shell component of the gas cooler for phthalic anhydride production is provided with a accommodating space, a pipeline is installed in the accommodating space, an air inlet and an air outlet are both installed in the shell component and are respectively connected with the pipeline, so that phthalic anhydride gas can flow out from the air inlet through the pipeline to the air outlet, a water inlet and a water outlet are both installed in the shell component and are respectively connected with the accommodating space, so that coolant can flow out from the water inlet through the accommodating space to the water outlet, a rotating spiral brush cleaning component is installed in the pipeline and is used to clean the pipeline, so that the cooler can clean itself without corroding the heat dissipation fins, and the cleaning efficiency is improved conveniently and quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] in: Figure 1 This is an axonometric schematic diagram of a gas cooler for phthalic anhydride production in one embodiment.

[0017] Figure 2 for Figure 1 A front view of a gas cooler for phthalic anhydride production is shown.

[0018] Figure 3 for Figure 2 A cross-sectional view of AA in a gas cooler for phthalic anhydride production is shown.

[0019] Figure 4 for Figure 3 The diagram shows a partial enlarged schematic diagram of section B in a gas cooler for phthalic anhydride production.

[0020] Figure 5 for Figure 1 A schematic diagram of a first angle explosion of a gas cooler for phthalic anhydride production is shown.

[0021] Figure 6 for Figure 1 A second angle explosion diagram of a gas cooler for phthalic anhydride production is shown.

[0022] Figure 7 for Figure 1 A side view of a gas cooler for phthalic anhydride production is shown.

[0023] Figure 8 for Figure 7 Cross-sectional view of CC in a gas cooler for phthalic anhydride production.

[0024] Reference numerals: 1. Shell assembly; 11. Upper cover; 111. Air inlet channel; 112. Air outlet channel; 113. First flow channel; 12. Shell; 13. Base; 131. Second flow channel; 132. Discharge channel; 14. Accommodation space; 2. Air inlet; 3. Air outlet; 4. Water inlet; 5. Water outlet; 6. pipe; 61. spiral groove; 62. opening; 7. Rotary spiral brush cleaning assembly; 71. Coil; 72. Mounting piece; 73. Mounting shaft; 74. Magnetic core; 75. Cleaning piece; 751. Connecting rod; 752. First brush head; 753. Second brush head; 8. Heat sink fins; 9. Copper sheet; 101. Sealing element; 102. Control valve. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0027] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They 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, and therefore cannot be understood as a limitation on the present invention.

[0028] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0029] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0030] Please combine Figures 1 to 8 Now, the gas cooler for phthalic anhydride production provided by the present invention is described.

[0031] A gas cooler for phthalic anhydride production comprises a shell assembly 1, an air inlet 2, an air outlet 3, a water inlet 4, a water outlet 5, a pipeline 6 and a rotating spiral brush cleaning assembly 7. The shell assembly 1 is provided with a accommodating space 14, the pipeline 6 is installed in the accommodating space 14, the air inlet 2 and the air outlet 3 are both installed on the shell assembly 1 and are respectively connected to the pipeline 6, the water inlet 4 and the water outlet 5 are both installed on the shell assembly 1 and are respectively connected to the accommodating space 14, and the rotating spiral brush cleaning assembly 7 is installed on the pipeline 6 and is used to clean the pipeline 6.

[0032] It can be understood that the shell component 1 of the gas cooler for phthalic anhydride production is provided with a accommodating space 14, the pipeline 6 is installed in the accommodating space 14, the air inlet 2 and the air outlet 3 are both installed in the shell component 1, and are respectively connected with the pipeline 6, so that the phthalic anhydride gas can flow out from the air inlet 2 through the pipeline 6 and out of the air outlet 3, the water inlet 4 and the water outlet 5 are both installed in the shell component 1, and are respectively connected with the accommodating space 14, so that the coolant can flow out from the water inlet 4 through the accommodating space 14 and out of the water outlet 5, the rotating spiral brush cleaning component 7 is installed on the pipeline 6, and is used to clean the pipeline 6, so that the cooler can clean itself without corroding the heat sink fins 8, which is convenient and quick to improve the cleaning efficiency.

[0033] It should be noted that the air inlet 2 is connected to an external air pump, which can transport phthalic anhydride gas into the pipeline 6 and flow it into the gas storage tank from the air outlet 3, so that phthalic anhydride gas can continuously enter the pipeline 6, and the water inlet 4 is connected to an external water pump, which can transport coolant into the accommodating space 14 to cool the pipeline 6, and the cooled liquid flows out from the water outlet 5 to the water tank, so that the cooling water in the accommodating space 14 continuously circulates to cool the pipeline 6.

[0034] In this embodiment, the gas cooler for phthalic anhydride production also includes a heat sink 8 and a copper sheet 9 connected to the heat sink 8. The pipe 6 is provided with a spiral groove 61. The groove wall of the spiral groove 61 is provided with an opening 62 connected to the inside of the pipe 6. The copper sheet 9 is spirally inserted into the opening 62 and partially arranged in the pipe 6. The rotary spiral brush cleaning assembly 7 includes a coil 71, a mounting member 72, a mounting shaft 73, a magnetic core 74 and a cleaning member 75. The coil 71 surrounds the pipe 6. The mounting member 72 is installed on the wall of the pipe 6. The mounting shaft 73 is connected to the mounting member 72 and penetrates the magnetic core 74. The magnetic core 74 is connected to the cleaning member 75. The phthalic anhydride gas in the pipe 6 transfers heat to the copper sheet 9. The heat of the copper sheet 9 is transferred to the heat sink 8 outside the pipe 6, so that the cooling water in the accommodating space 14 can cool the heat sink 8. The heat sink fins 8 are arranged outside the pipe 6 to avoid the corrosion of the phthalic anhydride gas to the heat sink fins 8. The mounting shaft 73 is penetrated by a magnetic core 74 so that the magnetic core 74 can move on the mounting shaft 73. When the coil 71 is energized, the coil 71 generates a magnetic force, which can drive the magnetic core 74 to move on the mounting shaft 73. Since the copper sheet 9 and the wall surface of the groove are spiral, when the magnetic core 74 drives the cleaning piece 75 to move, the spiral copper sheet 9 and the wall surface of the groove will guide the cleaning piece 75 to rotate, thereby cleaning the copper sheet 9, the wall surface of the groove and the inner wall of the pipe 6. Next, the coil 71 is energized in the reverse direction, and the magnetic core 74 drives the cleaning piece 75 to move in the reverse direction. At this time, the cleaning piece 75 will clean the other side of the copper sheet 9 and the wall surface of the groove, and clean the inner wall of the pipe 6 again.

[0035] Specifically, the cleaning member 75 includes a connecting rod 751, and a first brush head 752 and a second brush head 753 connected to the connecting rod 751. The first brush head 752 is used to brush off the phthalic anhydride on the copper sheet 9, and the second brush head 753 is used to brush off the phthalic anhydride on the wall of the groove in the pipe 6, and brush off the phthalic anhydride on the inner wall of the pipe 6. Since the phthalic anhydride in the gas flows in the pipe 6, the coolant outside the pipe 6 will cool the phthalic anhydride gas, so that phthalic anhydride crystals and liquefied phthalic anhydride water droplets will be produced on the copper sheet 9, the wall of the groove and the inner wall of the pipe 6. By providing the first brush head 752 and the second brush head 753, the copper sheet 9, the wall of the groove and the inner wall of the pipe 6 can be cleaned.

[0036] Furthermore, the gas cooler for phthalic anhydride production further includes a seal 101, which is installed in the groove and used to seal the connection between the opening 62 and the copper sheet 9. The seal 101 can be a high temperature resistant sealing strip, and by providing the seal 101, the copper sheet 9 can be firmly inserted in the opening 62, and the phthalic anhydride gas in the pipeline 6 can be prevented from flowing out through the opening 62.

[0037] In addition, the housing assembly 1 includes an upper cover 11, a shell 12 and a base 13, and the upper cover 11, the shell 12 and the base 13 are arranged to form a receiving space 14. The base 13 and the shell 12 can be made in one piece. The upper cover 11 and the shell 12 are detachably connected. In this way, the upper cover 11 and the shell 12 can be disassembled to open the receiving space 14. The copper sheet 9 can be disassembled from the opening 62, so that the copper sheet 9 and the heat sink fins 8 can be taken out from the receiving space 14 to clean them more deeply.

[0038] Further, the upper cover 11 is provided with an air inlet channel 111 and an air outlet channel 112, the upper cover 11 is provided with a first flow channel 113, the base 13 is provided with a second flow channel 131, the pipeline 6 is connected with the first flow channel 113 and the second flow channel 131 through a sealing sheet, the air inlet channel 111 is connected with the air outlet channel 112 through the first flow channel 113, the pipeline 6, and the second flow channel 131, the air inlet 2 is connected with the air inlet channel 111, the air outlet 3 is connected with the air outlet channel 112, and the inner diameter of the first flow channel 113 is greater than the inner diameter of the second flow channel 131. Specifically, the phthalic anhydride gas entering the air inlet 2 flows into the pipeline 6 through the first flow channel 113, the gas in the pipeline 6 flows into the air outlet channel 112 through the second flow channel 131, and the gas in the air outlet channel 112 flows out from the air outlet 3.

[0039] In addition, the pipe 6 is connected to the first flow channel 113 and the second flow channel 131 through the sealing sheet. After the upper cover 11 covers the housing 12, the pipe 6 can be pressed at the first flow channel 113 and the second flow channel 131 through the sealing sheet to prevent gas from flowing out. When the pipe 6 needs to be disassembled, the upper cover 11 is opened to take out the pipe 6.

[0040] Furthermore, the base 13 is also provided with a discharge channel 132 connected to the second flow channel 131, and the phthalic anhydride and phthalic anhydride liquid brushed out in the pipe 6 flow into the discharge channel 132 through the second flow channel 131. When the phthalic anhydride crystals in the pipe 6 and the phthalic anhydride gas after cooling are liquefied into water droplets in the pipe 6, they will fall into the discharge channel 132 through the second flow channel 131 after being cleaned by the rotary spiral brush cleaning assembly 7.

[0041] Furthermore, the gas cooler for phthalic anhydride production further comprises a control valve 102, which is mounted on the base 13 and communicated with the discharge channel 132. By opening the control valve 102, the phthalic anhydride crystals and phthalic anhydride water droplets in the discharge channel 132 are discharged.

[0042] In one embodiment, if Figure 1As shown, the water inlet 4 and the water outlet 5 are both installed on the housing 12, and the height of the water inlet 4 is higher than the height of the water outlet 5, so that the cooling water will not overflow from the water inlet 4. The height of the water inlet 4 is lower than the height of the water outlet 5. In this way, after the water enters the water inlet 4, it flows out from the water outlet 5, and the cooling water can be cooled better.

[0043] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0044] The above disclosure is only the preferred embodiment of the present invention, which certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A gas cooler for phthalic anhydride production, characterized in that: The gas cooler for phthalic anhydride production comprises a shell component, an air inlet, an air outlet, a water inlet, a water outlet, a pipeline and a rotating spiral brush cleaning component, the shell component is provided with a containing space, the pipeline is installed in the containing space, the air inlet and the air outlet are both installed on the shell component and are respectively connected to the pipeline, the water inlet and the water outlet are both installed on the shell component and are respectively connected to the containing space, the rotating spiral brush cleaning component is installed on the pipeline and is used to clean the pipeline; The gas cooler for phthalic anhydride production also includes a heat sink fin and a copper sheet connected to the heat sink fin. The pipeline is provided with a spiral groove, and the groove wall of the spiral groove is provided with an opening connected to the inside of the pipeline. The copper sheet is spirally inserted into the opening and partially arranged in the pipeline. The rotary spiral brush cleaning assembly includes a coil, a mounting part, a mounting shaft, a magnetic core and a cleaning part. The coil surrounds the pipeline, the mounting part is installed on the pipeline wall, the mounting shaft is connected to the mounting part, and the magnetic core is passed through, and the magnetic core is connected to the cleaning part. The cleaning member comprises a connecting rod, and a first brush head and a second brush head connected to the connecting rod, wherein the first brush head is used to brush away the phthalic anhydride on the copper sheet, and the second brush head is used to brush away the phthalic anhydride on the groove wall in the pipe, and brush away the phthalic anhydride on the inner wall of the pipe; The gas cooler for phthalic anhydride production further comprises a sealing member, which is installed in the groove and used to seal the connection between the opening and the copper sheet; The shell assembly includes an upper cover, a shell and a base, and the upper cover, the shell and the base are arranged to form the accommodating space; The upper cover is detachably connected to the shell; The upper cover is provided with an air inlet channel and an air outlet channel, the upper cover is provided with a first flow channel, the base is provided with a second flow channel, the pipeline is connected with the first flow channel and the second flow channel through a sealing sheet, the air inlet channel is connected with the air outlet channel through the first flow channel, the pipeline, and the second flow channel, the air inlet is connected with the air inlet channel, the air outlet is connected with the air outlet channel, and the inner diameter of the first flow channel is larger than the inner diameter of the second flow channel.

2. The gas cooler for phthalic anhydride production according to claim 1, characterized in that: The base is also provided with a discharge channel connected to the second flow channel, and the phthalic anhydride and phthalic anhydride liquid brushed out of the pipeline flow into the discharge channel through the second flow channel.

3. The gas cooler for phthalic anhydride production according to claim 2, characterized in that: The gas cooler for phthalic anhydride production further comprises a control valve, which is mounted on the base and communicated with the discharge passage.

4. The gas cooler for phthalic anhydride production according to claim 1, characterized in that: The water inlet and the water outlet are both installed on the shell, and the height of the water inlet is higher than the height of the water outlet, or the height of the water inlet is lower than the height of the water outlet.

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