PTA product filtering device with automatic cleaning function

Abstract

The utility model relates to the field of PTA (pure terephthalic acid) product production equipment, in particular to a PTA product filtering device with an automatic cleaning function, which comprises two product filters, an inert gas input pipe is arranged at the bottom of each product filter, a feeding pipe is arranged at the top of each product filter and connected to a stock bin, and each product filter comprises a shell. A cylindrical filter screen is arranged in the shell, a pneumatic vibrator is arranged on the side wall of the cylindrical filter screen, a second branch pipe is arranged on the inert gas input pipe and connected to the top of the product filter, and a filter residue conveying pipe is arranged at the bottom of the product filter. According to the utility model, the pneumatic vibrator is arranged on the cylindrical filter screen of the product filter, the pneumatic vibrator can be started under the condition of blockage, blocky materials are shattered and shaken off, finally, the materials are conveyed to the slag bin from the filter slag conveying pipe, finally, packaging is completed, and automatic cleaning of the product filter is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to PTA product production equipment field especially a PTA product filter device with automatic cleaning function. BACKGROUND

[0002] In prior art, when filtering PTA product, two filters are switched, after one filter is blocked, the other filter is started to clean the blocked filter. Meanwhile, the fluid in the running process of PTA product filter is composed of gas, liquid and solid, under the condition of high solid content in the filter, blocky material is produced, which is easy to block the filter, so the filter needs to be switched frequently, consumes a lot of manpower, and a large amount of PTA particles are diffused into the air during the cleaning process, causing environmental pollution and increasing the risk of occupational diseases of cleaning personnel. SUMMARY

[0003] The utility model discloses a PTA product filter device with automatic cleaning function can filter PTA product, and automatically clean the filter after being blocked, so as to reduce the labor input and be safer.

[0004] The utility model discloses a kind of PTA product filter devices with automatic cleaning function, including two product filters, the bottom of product filter is provided with inert gas input pipe, product filter top is provided with feeding pipe, feeding pipe is connected to bunker, the product filter includes shell, is provided with cylindrical filter screen in shell interior, the bottom of cylindrical filter screen is inclined inclined plane, cylindrical filter screen separates shell into two cavities, inclined plane of the bottom of cylindrical filter screen is towards feed inlet, pneumatic vibrator is provided on the side wall of cylindrical filter screen, and pneumatic vibrator is located in the lower cavity range of shell, first branch pipe is provided on inert gas input pipe, the first branch pipe is connected to pneumatic vibrator, second branch pipe is provided on inert gas input pipe, the second branch pipe is connected to the top of product filter, filter residue conveying pipe is provided on the bottom of product filter.

[0005] The filter residue conveying pipe is connected to residue bunker, first bag filter is provided on the top of residue bunker, emptying pipe is provided on first bag filter, third branch pipe is provided on inert gas input pipe, the third branch pipe is connected to first bag filter, for blowback to first bag filter.

[0006] Discharge pipe is provided on the bottom of residue bunker, second bag filter is provided on discharge pipe, the bottom of discharge pipe is used to connect ton bag, the second bag filter is used to discharge gas in residue bunker during bagging process.

[0007] The third branch pipe is also connected to the second cloth bag filter for back blowing of the second cloth bag filter.

[0008] A filter residue scale is arranged at the bottom of the discharge pipe, and the ton bag is arranged on the filter residue scale for weighing the filter residue.

[0009] A material level meter is arranged on the residue bin for displaying the filter residue in the residue bin.

[0010] The PTA product filter device with automatic cleaning function provided by the utility model sets pneumatic vibrator on the cylindrical filter screen of the product filter, and the pneumatic vibrator can be started in the case of blockage to shake and shake off the blocky material, finally conveyed to the residue bin from the filter residue conveying pipe, finally completed packing, realizes the automatic cleaning of the product filter, improves the performance of stable operation of equipment, can reduce the labor input, and protects the environment. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a structural schematic view of the utility model;

[0012] Figure 2 It is a structural schematic view of the product filter of the utility model. DETAILED DESCRIPTION

[0013] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows by combining with the drawings and preferred embodiments.

[0014] Example 1:

[0015] As shown in the drawings, Figure 1 The utility model discloses a PTA product filter device with automatic cleaning function, including two product filters 1, the bottom of product filter 1 sets up inert gas input pipe 2, and the top of product filter 1 is provided with feeding pipe 3, and feeding pipe 3 is connected to bin, Figure 2As shown, the product filter 1 comprises a shell 101, inside which a cylindrical filter screen 102 is arranged, the bottom of the cylindrical filter screen 102 is an inclined slope, the cylindrical filter screen 102 divides the shell 101 into two cavities, an inlet 103 is arranged on the side wall of the lower cavity, the bottom slope of the cylindrical filter screen 102 faces the inlet 103, a pneumatic vibrator 104 is arranged on the side wall of the cylindrical filter screen 102 and is located in the lower cavity of the shell 101, a first branch pipe 5 is arranged on the inert gas input pipe 2 and is connected to the pneumatic vibrator 104, a second branch pipe 4 is arranged on the inert gas input pipe 2 and is connected to the top of the product filter 1, and a filter residue conveying pipe 6 is arranged at the bottom of the product filter 1.

[0016] The product conveying pipeline conveys the PTA product to the silo, and two product filters 1 are arranged side by side on the product conveying pipeline during the conveying process, the product conveying pipeline is connected to the inlets 103 of the product filters 1, and the PTA product enters the product filters 1 from the inlets 103 and is conveyed to the silo through the feeding pipes 3 at the top of the product filters 1 under the action of inert gas. Corresponding valves are arranged at the connection parts of each pipeline and the product filter 1 for switching between the product filters 1.

[0017] In actual production, the PTA product enters the lower cavity of the product filter 1, passes through the cylindrical filter screen 102 under the action of inert gas, enters the upper cavity of the product filter 1, and is conveyed to the silo along the feeding pipe 3. When one of the product filters 1 is blocked, the other product filter 1 is switched to filter the PTA product to ensure the continuous operation of the equipment. The valves of the inert gas input pipe 2, the feeding pipe 3, and the inlet 103 corresponding to the blocked product filter 1 are all closed, the valves of the filter residue conveying pipe 6, the first branch pipe 5, and the second branch pipe 4 corresponding to the blocked product filter 1 are opened, the pneumatic vibrator 104 is started, and inert gas is filled into the upper cavity of the product filter 1 through the first branch pipe 5, so as to backflush the cylindrical filter screen 102 of the product filter 1. Therefore, the blocky material on the cylindrical filter screen 102 is broken and falls off from the cylindrical filter screen 102 and is conveyed outward along the filter residue conveying pipe 6 under the action of inert gas. The above scheme can realize the automatic cleaning of the product filter 1, the cleaning speed is fast, the cleaning is more thorough, and the cleaning frequency can be effectively reduced. At the same time, the manual labor is reduced, the automatic cleaning is realized, the PTA particles in the filter will not be dispersed into the air, so the environment is also protected, and the risk of occupational disease of the workers is greatly reduced.

[0018] The bottom and the sidewall of the cylindrical filter screen 102 are provided with filter holes, and the bottom of the cylindrical filter screen 102 is an inclined surface which is inclined towards the feeding port 103, so that the PTA product can be filtered more smoothly and directly, and the filtering efficiency is improved.

[0019] The filter residue conveying pipe 6 is connected to the residue bin 8, the first bag filter 9 is arranged on the top of the residue bin 8, the emptying pipe 10 is arranged on the first bag filter 9, and the third branch pipe 7 is arranged on the inert gas input pipe 2 and connected to the first bag filter 9 for back blowing of the first bag filter 9.

[0020] The blocky material falling from the cylindrical filter screen 102 enters the bottom of the shell 101, and then is sent into the residue bin 8 along the filter residue conveying pipe 6 by the inert gas filled into the shell 101 through the first branch pipe 5, so that the solid material and the inert gas enter the residue bin 8 at the same time. In order to keep the air pressure in the residue bin 8 balanced, the first bag filter 9 is arranged on the top of the residue bin 8 to filter the solid material in the residue bin 8, and the inert gas is discharged outward, so that the material is not taken away and the environment is not polluted when the gas is discharged. When the gas is discharged for a long time, a large amount of material is attached to the first bag filter 9, which affects the filtering and discharging performance. Therefore, the third branch pipe 7 is used to introduce the inert gas into the first bag filter 9 to back blow the first bag filter 9, so that the solid material attached to the bag reenters the residue bin 8, and the filtering efficiency and the discharging efficiency of the first bag filter 9 are stable. The first bag filter 9 is a known product, and the specific structure is not described here. The connection form of the third branch pipe 7 and the first bag filter 9 is a known technology, and the back blowing of the first bag filter 9 is a conventional technology.

[0021] The discharge pipe 11 is arranged at the bottom of the residue bin 8, the second bag filter 12 is arranged on the discharge pipe 11, the bottom of the discharge pipe 11 is used to connect the ton bag 13, and the second bag filter 12 is used to discharge the gas in the residue bin 8 during the bagging process. After the solid material is temporarily stored in the residue bin 8 for a certain amount, it needs to be discharged and collected. Therefore, the discharge pipe 11 and the ton bag 13 are used to collect the solid material. However, since there is inert gas with a certain air pressure in the residue bin 8, the second bag filter 12 is used to discharge the gas when the material is discharged into the ton bag 13, so that the solid material collection process is in a normal pressure state. The second bag filter 12 is a known product, and its specific structure is not described here.

[0022] The third branch pipe 7 is also connected to the second cloth bag filter 12 for back blowing of the second cloth bag filter 12. Since solid materials will also adhere to the cloth bag during the exhaust of the second cloth bag filter 12, resulting in poor filtering effect and unstable exhaust, the third branch pipe 7 is also connected to the second cloth bag filter 12, and the inert gas filled in the third branch pipe 7 is used to back flush the second cloth bag filter 12 to make the solid materials on the cloth bag fall off. Of course, the connection form of the third branch pipe 7 and the second cloth bag filter 12 is the existing known structure, and the back blowing technology of the second cloth bag filter 12 is also the prior art.

[0023] A filter residue scale 14 is arranged at the bottom of the discharge pipe 11, and the ton bag 13 is arranged on the filter residue scale 14 for weighing the filter residue. The ton bag 13 is arranged on the filter residue scale 14 for weighing the amount of filter residue collected by each ton bag 13 to ensure the stability of the collected weight, and the ton bag 13 can be normally used. The filter residue refers to the solid materials.

[0024] A material level meter 15 is arranged on the residue bin 8 for displaying the amount of filter residue in the residue bin 8.

[0025] The material level meter 15 on the residue bin 8 is an existing known product, which mainly displays the amount of filter residue in the residue bin 8. When the amount of filter residue in the residue bin 8 reaches a certain degree, it will be discharged and collected in the ton bag 13.

[0026] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0027] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; can be mechanical connection; can be directly connected, or indirectly connected through intermediate medium, can be the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0028] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0029] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the technical solution of the present application, and any simplification, modification, equivalent change and modification of the above embodiment according to the technical essence of the present application still belongs to the scope of the technical solution of the present application.

Claims

1. A PTA product filtration device with automatic cleaning function, comprising two product filters, an inert gas inlet pipe at the bottom of each product filter, and a feed pipe at the top of each product filter connected to a hopper, characterized in that: The product filter comprises a shell, a cylindrical filter screen is arranged inside the shell, the bottom of the cylindrical filter screen is an inclined slope, the cylindrical filter screen separates the shell into two cavities, an inlet is arranged on the sidewall of the lower cavity, the bottom slope of the cylindrical filter screen faces the inlet, a pneumatic vibrator is arranged on the sidewall of the cylindrical filter screen and located in the range of the lower cavity of the shell, a first branch pipe is arranged on the inert gas input pipe and connected to the pneumatic vibrator, a second branch pipe is arranged on the inert gas input pipe and connected to the top of the product filter, and a filter residue conveying pipe is arranged at the bottom of the product filter.

2. The PTA product filtering device with automatic cleaning function according to claim 1, characterized in that: The filter residue conveying pipe is connected to a residue bin, a first bag filter is arranged on the top of the residue bin, a venting pipe is arranged on the first bag filter, a third branch pipe is arranged on the inert gas input pipe and connected to the first bag filter for back blowing of the first bag filter.

3. The PTA product filtering device with automatic cleaning function according to claim 2, characterized in that: A discharge pipe is arranged at the bottom of the residue bin, a second bag filter is arranged on the discharge pipe, the bottom of the discharge pipe is used for connecting a ton bag, and the second bag filter is used for discharging the gas in the residue bin during bagging.

4. The PTA product filtering device with automatic cleaning function according to claim 3, characterized in that: The third branch pipe is also connected to the second bag filter for back blowing of the second bag filter.

5. The PTA product filtering device with automatic cleaning function according to claim 3, characterized in that: A filter residue scale is arranged at the bottom of the discharge pipe, and the ton bag is arranged on the filter residue scale and used for weighing the filter residue.

6. The PTA product filtering device with automatic cleaning function according to claim 3, characterized in that: A material level meter is arranged on the residue bin and used for displaying the amount of filter residue in the residue bin.

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