Dehydrating tower for producing purified terephthalic acid

Abstract

The utility model relates to the technical field of terephthalic acid production, in particular to a dehydrating tower for purified terephthalic acid production. Comprising a dehydrating tower body and an auxiliary device, and the auxiliary device comprises a cover plate, a guide pipe with holes, an exhaust pipe, a uniform distribution pipe, a filter, a cleaning valve, a heating assembly, a temperature measuring assembly and a material control assembly. The electric heater works to heat, vaporize and pressurize and convey the input inert gas, the filter filters the inert gas, and the inert gas is conveyed through the uniform distribution pipe and then is ejected to a terephthalic acid and washed dehydrated acetic acid solvent area in the dehydrating tower body through the output side guide hole of the guide pipe with the hole, so that the terephthalic acid and the washed dehydrated acetic acid solvent are mixed and dried; therefore, the problem that the dehydration effect of the refined terephthalic acid is not ideal due to the fact that the refined terephthalic acid cannot be effectively dried in an inert gas heating vaporization mode when the existing dehydration tower is used for dehydrating the refined terephthalic acid is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of terephthalic acid production, in particular to a dehydration tower for the production of purified terephthalic acid. Background Art

[0002] Terephthalic acid is a dicarboxylic acid, which is mainly produced from paraxylene. It is solid at room temperature, does not melt when heated, and sublimates above 300°C. If heated in a closed container, it can melt at 425°C. It is insoluble in water at room temperature and is the main raw material for producing polyester. It is often used to manufacture synthetic polyester resins, synthetic fibers, etc.

[0003] At present, during the refining process of terephthalic acid, it needs to be dehydrated. However, the existing dehydration tower currently used cannot use the inert gas heating vaporization method to effectively dry the refined terephthalic acid when dehydrating the refined terephthalic acid, resulting in unsatisfactory dehydration effect of the refined terephthalic acid. Utility Model Content

[0004] The utility model aims to provide a dehydration tower for the production of purified terephthalic acid, aiming to solve the problem that the existing dehydration tower currently used cannot use the inert gas heating vaporization method to effectively dry the purified terephthalic acid when dehydrating the purified terephthalic acid, resulting in an unsatisfactory dehydration effect of the purified terephthalic acid.

[0005] To achieve the above-mentioned purpose, the utility model provides a dehydration tower for the production of purified terephthalic acid, comprising a dehydration tower body and an auxiliary device;

[0006] The auxiliary device includes a cover plate, a perforated conduit, an exhaust pipe, an equalizing pipe, a filter, a cleaning valve, a heating component, a temperature measuring component and a material control component. The cover plate is fixedly connected to the dehydration tower body and is located at the top of the dehydration tower body. The perforated conduit is fixedly connected to the cover plate and extends into the dehydration tower body, and a circular array is arranged on the cover plate. The exhaust pipe is threadedly connected to the cover plate and is located on the cover plate. The equalizing pipe is detachably connected to the perforated conduit and is located at the top of the perforated conduit. The filter is fixedly connected to the equalizing pipe and is located at the input side of the equalizing pipe. The cleaning valve is threadedly connected to the cover plate and is located at the top of the cover plate. The heating component is arranged on the side of the dehydration tower body close to the filter. The temperature measuring component is arranged on the front side of the dehydration tower body. The material control component is arranged on the dehydration tower body.

[0007] Wherein, the heating assembly includes an electric heater and a connecting pipe, the electric heater is fixedly connected to the dehydration tower body and is located on the rear side of the dehydration tower body; the connecting pipe is detachably connected to the electric heater and detachably connected to the filter, and is located on the side of the electric heater close to the filter.

[0008] Wherein, the temperature measurement component includes a temperature sensor and a display, the temperature sensor is fixedly connected to the dehydration tower body and located on the front side of the dehydration tower body; the display is fixedly connected to the dehydration tower body and located on the side of the dehydration tower body close to the temperature sensor.

[0009] Among them, the material control assembly includes a feed pipe, a discharge pipe and a discharge valve, the feed pipe is welded on the upper right side of the dehydration tower body; the discharge pipe is welded on the lower right side of the dehydration tower body; the discharge valve is fixedly connected to the dehydration tower body and is located at the bottom of the dehydration tower body.

[0010] Wherein, the auxiliary device also includes a filter screen and a steel mesh plate, the filter screen is fixedly connected to the exhaust pipe and is located inside the exhaust pipe; the steel mesh plate is fixedly connected to the exhaust pipe and is located above the filter screen.

[0011] The utility model discloses a dehydration tower for producing purified terephthalic acid. The cover plate is installed on the top of the dehydration tower body, the perforated conduit is installed on the cover plate and extends into the dehydration tower body, the exhaust pipe is installed on the cover plate, the equalizing pipe is installed on the top of the perforated conduit, the filter is installed on the input side of the equalizing pipe, the cleaning valve is installed on the cover plate, the heating component is arranged on the side of the dehydration tower body close to the filter, the temperature measuring component is arranged on the front side of the dehydration tower body, and the material control component is arranged on the dehydration tower body. During processing, the worker sequentially injects terephthalic acid and washed dehydrated acetic acid solvent into the dehydration tower body through the material control component, and then controls the dehydration tower body to be heated. The electric heater works to heat, vaporize and pressurize the inert gas input from the external pipe, and the filter filters the inert gas being transported. The heated, vaporized and pressurized inert gas is transported through the equalizing pipe and then ejected through the output side guide hole of the perforated conduit to the terephthalic acid and washed dehydrated acetic acid solvent area in the dehydration tower body to mix and dry them, thereby solving the problem that the currently used dehydration tower cannot effectively dry the purified terephthalic acid by heating and vaporizing the purified terephthalic acid, resulting in unsatisfactory dehydration effect of the purified terephthalic acid. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0013] Figure 1It is a schematic diagram of the overall structure of a dehydration tower for producing purified terephthalic acid according to the first embodiment of the utility model.

[0014] Figure 2 It is a structural schematic diagram of a perforated catheter according to the first embodiment of the utility model.

[0015] Figure 3 It is a schematic diagram of the overall structure of a dehydration tower for producing purified terephthalic acid according to the second embodiment of the utility model.

[0016] Figure 4 It is a schematic structural diagram of the filter screen of the second embodiment of the utility model.

[0017] In the figure: 101-dehydration tower body, 102-cover plate, 103-perforated conduit, 104-exhaust pipe, 105-equalizing pipe, 106-filter, 107-cleaning valve, 108-electric heater, 109-connecting pipe, 110-temperature sensor, 111-display, 112-feed pipe, 113-discharge pipe, 114-discharge valve, 201-filter screen, 202-wire mesh plate. DETAILED DESCRIPTION

[0018] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0019] Embodiment 1:

[0020] like Figure 1 and Figure 2 As shown, Figure 1 This is a schematic diagram of the overall structure of the dehydration tower used in the production of purified terephthalic acid. Figure 2 It is a structural schematic diagram of a perforated conduit 103. The utility model provides a dehydration tower for the production of purified terephthalic acid: it includes a dehydration tower body 101 and an auxiliary device, the auxiliary device includes a cover plate 102, a perforated conduit 103, an exhaust pipe 104, an equalizing pipe 105, a filter 106, a cleaning valve 107, a heating component, a temperature measuring component and a material control component, the heating component includes an electric heater 108 and a connecting pipe 109, the temperature measuring component includes a temperature sensor 110 and a display 111, and the material control component includes a feed pipe 112, a discharge pipe 113 and a discharge valve 114. The above scheme can solve the problem that when the currently used dehydration tower dehydrates purified terephthalic acid, the purified terephthalic acid cannot be effectively dried by inert gas heating vaporization, resulting in an unsatisfactory dehydration effect of the purified terephthalic acid. It can be understood that the above scheme can achieve effective drying of purified terephthalic acid by inert gas heating vaporization, thereby improving the treatment effect.

[0021] In this embodiment, the dehydration tower body 101 can be fixed by the bottom support feet and anchor bolts, and a mounting platform is provided at the rear side of the shell of the dehydration tower body 101.

[0022] The cover plate 102 is fixedly connected to the dehydration tower body 101 and is located at the top of the dehydration tower body 101; the perforated conduit 103 is fixedly connected to the cover plate 102 and extends into the dehydration tower body 101, and is arranged in a circular array on the cover plate 102; the exhaust pipe 104 is threadedly connected to the cover plate 102 and is located on the cover plate 102; the equalizing pipe 105 is detachably connected to the perforated conduit 103 and is located at the top of the perforated conduit 103; the filter 106 is fixedly connected to the equalizing pipe 105 and is located at the input side of the equalizing pipe 105; the cleaning valve 107 is threadedly connected to the cover plate 102 and is located at the top of the cover plate 102; the heating component is arranged on the side of the dehydration tower body 101 close to the filter 106; the temperature measuring component is arranged on the front side of the dehydration tower body 101; and the material control component is arranged on the dehydration tower body 101. The cover plate 102 is fixed to the top of the dehydration tower body 101 by bolts, and a sealing gasket is arranged at the contact point. After installation, the interior of the dehydration tower body 101 is sealed. The mounting plate of the perforated conduit 103 is mounted on the cover plate 102 by bolts, and 4 groups are arranged in a circular array. The four air guide connecting plates on the equalizing pipe 105 are connected to the top connecting plate of the perforated conduit 103 by screws and nuts. The output side flange of the filter 106 is connected to the input side flange of the equalizing pipe 105 by screws and nuts. The threaded mounting end at the bottom of the cleaning valve 107 can be directly Installed in the threaded mounting through hole on the cover plate 102, the top flange of the cleaning valve 107 is connected to the external clean water delivery pipeline, and clean water can be introduced through the cleaning valve 107 during processing and use to perform internal cleaning. The heating component is arranged on the side of the dehydration tower body 101 close to the filter 106, and is used for heating, vaporizing and pressurizing the inert gas. The temperature measuring component is arranged on the front side of the dehydration tower body 101 for temperature monitoring. The material control component is arranged on the dehydration tower body 101, and is used for material input, output and water discharge after drying.

[0023] Secondly, the electric heater 108 is fixedly connected to the dehydration tower body 101 and is located at the rear side of the dehydration tower body 101; the connecting pipe 109 is detachably connected to the electric heater 108 and the filter 106 and is located on the side of the electric heater 108 close to the filter 106. The electric heater 108 is installed on the mounting platform at the rear side of the dehydration tower body 101 by bolts, and its T-shaped input pipe is arranged on the right side and connected to the inert gas delivery pipeline. A pressurized air pump is arranged at the top outlet for pressurizing the gas for delivery. The input side flange of the connecting pipe 109 is connected to the output side flange of the pressurized air pump at the top of the electric heater 108 by bolts, and the output side flange is connected to the input side flange of the filter 106 by screws and nuts.

[0024] Then, the temperature sensor 110 is fixedly connected to the dehydration tower body 101 and is located at the front side of the dehydration tower body 101; the display 111 is fixedly connected to the dehydration tower body 101 and is located at the side of the dehydration tower body 101 close to the temperature sensor 110. The temperature sensor 110 is installed on the dehydration tower body 101 by bolts, and is used to monitor the temperature inside the dehydration tower body 101 and feed the information back to the control system. The display 111 is installed on the dehydration tower body 101 by bolts, and a heat insulation board is set at the installation contact with the dehydration tower body 101 for safety protection. After receiving the monitoring data of the temperature sensor 110, the control system performs processing and calculation, and the final data can be displayed through the display 111.

[0025] Finally, the feed pipe 112 is welded to the upper right side of the dehydration tower body 101; the discharge pipe 113 is welded to the lower right side of the dehydration tower body 101; the discharge valve 114 is fixedly connected to the dehydration tower body 101 and is located at the bottom of the dehydration tower body 101. The feed pipe 112 is welded to the feed port of the dehydration tower body 101, and a threaded cover is installed on the inlet to seal it; the discharge pipe 113 is welded to the feed port of the dehydration tower body 101, and a threaded cover is installed on the inlet to seal it; the discharge valve 114 mounting plate is installed on the outside of the water outlet at the bottom of the dehydration tower body 101 by bolts.

[0026] When the utility model is used to solve the problem that the dehydration tower currently used for dehydrating purified terephthalic acid cannot be effectively dried by heating and vaporizing purified terephthalic acid with inert gas, resulting in unsatisfactory dehydration effect of purified terephthalic acid, during processing, workers sequentially inject terephthalic acid and washed dehydrated acetic acid solvent into the dehydration tower body 101 through the feed pipe 112, and then control the electric heater 108 to work, heat and vaporize the inert gas input from the external pipe line and pressurize the inert gas for transportation, the connecting pipe 109 assists in transportation, and the filter 106 filters the inert gas for transportation, heats, vaporizes and pressurizes the inert gas. After the inert gas is transported through the equalizing pipe 105, it is sprayed out through the output side guide holes of the plurality of perforated conduits 103 to the terephthalic acid and the washed dehydrated acetic acid solvent area in the dehydration tower body 101 to mix and dry them. The dried and dehydrated purified terephthalic acid is discharged through the discharge pipe 113. The water generated by drying can be discharged by opening the discharge valve 114. The exhaust pipe 104 is used for exhausting waste gas, thereby solving the problem that when the currently used dehydration tower dehydrates purified terephthalic acid, the purified terephthalic acid cannot be effectively dried by heating and vaporizing the purified terephthalic acid, resulting in an unsatisfactory dehydration effect of the purified terephthalic acid.

[0027] Embodiment 2:

[0028] like Figure 3 and Figure 4 As shown, Figure 3 This is a schematic diagram of the overall structure of the dehydration tower used in the production of purified terephthalic acid. Figure 4 201 is a schematic diagram of the structure of the filter screen 201. On the basis of the first embodiment, the utility model provides a dehydration tower for the production of purified terephthalic acid. The auxiliary device further includes a filter screen 201 and a steel wire mesh plate 202.

[0029] The filter screen 201 is fixedly connected to the exhaust pipe 104 and is located inside the exhaust pipe 104; the steel mesh plate 202 is fixedly connected to the exhaust pipe 104 and is located above the filter screen 201. A stepped groove is provided in the outlet cavity at the top of the exhaust pipe 104 to facilitate the fixing and installation of the filter screen 201 and the steel mesh plate 202 by bolts.

[0030] In this embodiment, by setting the filter 201, the exhaust gas generated by the equipment processing can be filtered through the filter 201 and then discharged. By setting the wire mesh plate 202, external debris can be prevented from falling into the dehydration tower body 101, and the filter 201 can be protected at the same time.

[0031] What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still within the scope covered by the present application.

Claims

1. A dehydration tower for producing purified terephthalic acid, comprising a dehydration tower body, characterized in that: Also includes auxiliary devices; The auxiliary device includes a cover plate, a perforated conduit, an exhaust pipe, an equalizing pipe, a filter, a cleaning valve, a heating component, a temperature measuring component and a material control component. The cover plate is fixedly connected to the dehydration tower body and is located at the top of the dehydration tower body. The perforated conduit is fixedly connected to the cover plate and extends into the dehydration tower body, and a circular array is arranged on the cover plate. The exhaust pipe is threadedly connected to the cover plate and is located on the cover plate. The equalizing pipe is detachably connected to the perforated conduit and is located at the top of the perforated conduit. The filter is fixedly connected to the equalizing pipe and is located at the input side of the equalizing pipe. The cleaning valve is threadedly connected to the cover plate and is located at the top of the cover plate. The heating component is arranged on the side of the dehydration tower body close to the filter. The temperature measuring component is arranged on the front side of the dehydration tower body. The material control component is arranged on the dehydration tower body.

2. The dehydration tower for producing purified terephthalic acid according to claim 1, characterized in that: The heating assembly includes an electric heater and a connecting pipe. The electric heater is fixedly connected to the dehydration tower body and is located at the rear side of the dehydration tower body. The connecting pipe is detachably connected to the electric heater and detachably connected to the filter, and is located on the side of the electric heater close to the filter.

3. The dehydration tower for producing purified terephthalic acid according to claim 1, characterized in that: The temperature measurement component includes a temperature sensor and a display. The temperature sensor is fixedly connected to the dehydration tower body and is located at the front side of the dehydration tower body; the display is fixedly connected to the dehydration tower body and is located on the side of the dehydration tower body close to the temperature sensor.

4. The dehydration tower for producing purified terephthalic acid according to claim 1, characterized in that: The material control assembly includes a feed pipe, a discharge pipe and a discharge valve. The feed pipe is welded to the upper right side of the dehydration tower body; the discharge pipe is welded to the lower right side of the dehydration tower body; the discharge valve is fixedly connected to the dehydration tower body and is located at the bottom of the dehydration tower body.

5. The dehydration tower for producing purified terephthalic acid according to claim 1, characterized in that: The auxiliary device also includes a filter screen and a steel mesh plate. The filter screen is fixedly connected to the exhaust pipe and is located inside the exhaust pipe; the steel mesh plate is fixedly connected to the exhaust pipe and is located above the filter screen.

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