Filtering device in MOCA production process

Abstract

The utility model relates to the technical field of chemical equipment, in particular to a filtering device in the MOCA production process, which comprises a body provided with a barrel-shaped shell, a rotating shaft is arranged on the central axis of the shell, a base is arranged at the bottom of the rotating shaft, and a cofferdam is arranged between the base and the body; a plurality of supporting frameworks are uniformly and symmetrically arranged from the middle part to the upper part of the rotating shaft, the supporting frameworks are connected with a rotating part in a supporting manner, and the rotating part comprises a plurality of uniformly arranged filtering cavities and a barrel-shaped rotating part side wall connected with the peripheries of the filtering cavities; a filter bag support frame is arranged at the upper part of the filter cavity, and a detachably connected filter plate is arranged at the bottom; a purging pipeline is fixedly arranged on the outer side of the side wall of the filtering cavity; a limiting stopper is arranged between the side wall of the rotating piece and the body shell, and cover body supports are symmetrically arranged on the two sides of the upper portion and the two sides of the lower portion of the body shell. The filter is simple and convenient to clean, the filter material can be repeatedly used, the labor intensity is reduced, the use amount of filter paper is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, in particular to a filtering device in the MOCA production process. Background Art

[0002] 3,3'-Dichloro-4,4'-diaminodiphenylmethane (MOCA) is primarily used as a bridging agent for polyurethane and epoxy resins. In actual production, after removing water and free raw materials, materials are filtered to remove impurities. Closed plate filters are often used, and wastewater generated during the production process is simply treated and reused. The recycled water often contains metal ions, such as calcium and magnesium, which are present in the wastewater or generated during the production process. These ions react with the raw materials to form small amounts of precipitates, clogging the filter paper in the filtration device and causing frequent downtime for cleaning. Each cleaning requires a long downtime, followed by removal and replacement of the filter material (disposable filter paper bags). This is a heavy and time-consuming process, seriously impacting production efficiency. Utility Model Content

[0003] The technical problem to be solved by the utility model is: in view of the shortcomings of the existing technology such as the large amount of filter materials used and the long downtime for cleaning and replacement, a filtering device is provided in the MOCA production process. The filtering device is simple and convenient to clean, the filter materials can be reused, the labor intensity is reduced, the amount of filter paper used is reduced, and the production efficiency is improved.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] A filtering device for use in an MOCA production process comprises a main body provided with a cylindrical outer shell, a rotating shaft (which does not rotate during filtering operation) being provided on the central axis of the outer shell, a base being provided at the bottom of the rotating shaft, and a cofferdam being provided between the base and the main body; a plurality of supporting frames being evenly and symmetrically provided from the middle to the upper part of the rotating shaft, the supporting frames being connected and supported by a rotating member, the rotating member comprising a plurality of evenly provided filter cavities (one for filtering, one for purging, and the others being spare) and a side wall of a cylindrical rotating member connected to the outer periphery of the filter cavity; a filter bag support frame (for supporting a filter bag) being provided at the upper part of the filter cavity, and a detachably connected filter plate being provided at the bottom; a purging pipe being fixedly provided on the outer side of the side wall of the filter cavity; a limiter being provided between the side wall of the rotating member and the main body outer shell (for fixing the rotating member and the outer shell), and a cover bracket being symmetrically provided on both sides of the upper and lower parts of the main body outer shell for supporting a feed sealing cover, a discharge sealing cover, a purge upper sealing cover and a purge lower sealing cover provided with a cylinder (not required for other filter cavities).

[0006] Preferably, the filter bag support frame is a perforated plate support frame. The middle and lower parts of the filter bag support frame are provided with a plurality of liquid permeable holes.

[0007] Preferably, the filter plate is placed on four support columns symmetrically arranged on the side walls of the filter cavity.

[0008] Preferably, the limiter comprises a pull rod, a spring pulled by the pull rod, and a supporting link controlled by the pull rod and the spring, wherein a pin is provided at the top end of the supporting link to realize the limiting function.

[0009] Preferably, the purge pipe is arranged outside the filter cavity near the side wall of the rotating part, a pneumatic valve is provided at the connection between the bottom end of the purge pipe and the side wall of the filter cavity, and a quick-connect joint is provided at the upper end of the purge pipe.

[0010] Preferably, the feed sealing cover is a flat sealing cover with a feed port provided on the cover; the top of the discharge sealing cover is provided with an arc (to increase the volume inside the cover to prevent material from gathering and affecting filtration), and the top of the cover is provided with a discharge port.

[0011] Preferably, the discharge sealing cover is provided with a temperature-controlling jacket (which has the function of heat preservation. The temperature of the material will drop after filtration, especially in winter when the temperature of the material may drop significantly after filtration, so steam or hot water is needed for heat preservation). The temperature-controlling jacket is provided with a hot water / steam inlet and a hot water / steam outlet for heat preservation of the material in the filter cavity.

[0012] Preferably, the top of the upper sealing cover for purging is provided with an arc (the filter bag will turn up during purging, and there needs to be a large enough space to prevent the filter bag from bending, piling up, or blocking and affecting the degree of cleaning), and the lower sealing cover for purging is a flat sealing cover.

[0013] Preferably, the feed sealing cover and the purge upper sealing cover are both provided with a height adjustment device, which includes an adjusting handwheel arranged on the outside of the side wall of the filter cavity, an adjusting rod connected to the adjusting handwheel and passing through the side wall of the filter cavity and the edge of the feed sealing cover or the purge upper sealing cover (turning the adjusting handwheel moves the adjusting rod up and down), and a quick-connect buckle at the lower part of the edge of the feed sealing cover or the purge upper sealing cover; a thread for movement matching the adjusting rod is provided on the side wall of the filter cavity, as well as a cavity for moving the adjusting rod up and down.

[0014] Preferably, the upper portion of the filter bag support frame is provided with a button hole, and the filter bag is provided with a button point, which is connected to the filter bag support frame through the button hole.

[0015] Preferably, the upper and lower sealing covers are both provided with material outlets, which are connected to a waste collection tank outside the main body through pipes; the waste collection tank has an air extraction port on its side wall, a support device and a filter bag inside, a feed port with a filter screen and a one-way air inlet (cooperating with the air extraction port to assist in filtration) on its top; the bottom of the tank is arc-shaped, a filter screen is provided on the upper edge of the arc-shaped bottom, and a sewage outlet is provided on the top of the arc-shaped bottom, which can effectively further separate the filter residue.

[0016] Preferably, the filter plate is provided with filter cloth to form a three-layer filtration to enhance the filtration effect.

[0017] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0018] 1. The material of the utility model is filtered twice by the filter bag and the filter plate and then flows out from the outlet of the lower cover. The two filter materials can be repeatedly cleaned and reused under the condition that there is no damage. In addition, the filter device is reasonably designed and simple in structure, which can achieve effective filtration of the feed liquid.

[0019] 2. The utility model is provided with multiple filter chambers, one of which is filtering while the others can be purged and cleaned, filter paper replaced, or in standby state. At the same time, by changing the structure of the filtering device, the initial filtration area and impurity storage chamber space are increased. The device reduces the immediate inventory of materials to be filtered inside the filtering device, greatly reducing the possibility of disassembling and cleaning the filter during the process; ensuring the continuity of production, improving production efficiency and reducing material consumption.

[0020] In short, the utility model is simple and convenient to clean, the filter material can be used repeatedly, the labor intensity is reduced, the amount of filter paper used is reduced, and the production efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the top view of the structure of an embodiment of the utility model;

[0023] Figure 3 This is a schematic structural diagram of a limiter according to an embodiment of the present utility model;

[0024] Figure 4 This is a schematic structural diagram of the filter cavity according to an embodiment of the present utility model;

[0025] Figure 5 This is a schematic diagram of the top view of the filter cavity according to an embodiment of the present utility model;

[0026] Figure 6This is a structural diagram of the height adjustment device for the upper sealing cover of the purge according to an embodiment of the present utility model;

[0027] Among them, 1. outer shell; 2. rotating shaft; 3. base; 4. cofferdam; 5. supporting frame; 6. filter chamber; 7. side wall of rotating part; 8. filter bag support frame; 9. filter plate; 10. purge pipe; 11. limiter; 111. pull rod; 112. spring; 113. supporting connecting rod; 114. pin; 12. cover bracket; 13. feed sealing cover; 14. discharge sealing cover; 15. purge upper sealing cover; 16. adjusting hand wheel; 17. adjusting rod; 18. quick connect buckle; 19. buckle hole. DETAILED DESCRIPTION

[0028] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0029] like Figures 1 to 6 As shown, the utility model is a filtering device for use in the production process of MOCA, comprising a main body (not shown) provided with a cylindrical shell 1, a rotating shaft 2 being provided on the central axis of the shell 1, a base 3 being provided at the bottom of the rotating shaft 2, and a cofferdam 4 being provided between the base 3 and the main body (which does not rotate with the rotating shaft, collects waste materials and protects the internal components of the main body; prevents impurities from falling when opening the bottom valve and disassembling the filter plate, or block materials that are not completely discharged in abnormal situations); three groups of supporting frames 5 are evenly and symmetrically arranged from the middle to the upper part of the rotating shaft 2, with four supporting frames in each group, for a total of twelve supporting frames 5, and the supporting frames 5 are connected and supported by a rotating member (not shown), which includes four evenly arranged filter cavities 6 (one for filtering, one for purging, and the others are for standby) and a cylindrical rotating part side wall 7 connected to the outer periphery of the filter chamber 6; a filter bag support frame 8 (for supporting the filter bag) is provided on the upper part of the filter chamber 6, and a detachably connected filter plate 9 is provided on the bottom; a purge pipe 10 is fixedly provided on the outer side of the side wall of the filter chamber 6; a limiter 11 (for fixing the rotating part and the shell) is provided between the rotating part side wall 7 and the main body shell 1, and a cover body bracket 12 is symmetrically provided on both sides of the upper and lower parts of the main body shell 1, for supporting a feed sealing cover 13, a discharge sealing cover 14, a purge upper sealing cover 15 and a purge lower sealing cover (not marked) provided with a cylinder (not marked).

[0030] The filter plate 9 is placed on four support columns (not marked) symmetrically arranged on the side walls of the filter chamber 6; the limiter 11 includes a pull rod 111, a spring 112 pulled by the pull rod 111, and a support link 113 controlled by the pull rod 111 and the spring 112, and a pin 114 is provided at the top of the support link 113; the feed sealing cover 13 and the purge upper sealing cover 15 are both provided with a height adjustment device (not marked), the height adjustment device includes an adjusting hand wheel 16, an adjusting rod 17 connected to the adjusting hand wheel 16 and passing through the edge of the feed sealing cover 13 or the purge upper sealing cover 14 cover body, and a quick-connect buckle 18 at the lower part of the edge of the feed sealing cover 13 or the purge upper sealing cover 14 cover body; a buckle hole 19 is provided on the upper part of the filter bag support frame.

[0031] In actual application, the filter plate 9 of the filter cavity 6 to be filtered is first placed on the four support columns (not marked) on the side wall of the filter cavity 6, and then the filter bag is placed on the filter bag support frame 8, and the filter bag is buckled by turning outward at the edge; the cover body bracket 12 covers the feed sealing cover 13 and the discharge sealing cover 14, and at the same time, the cylinder and corresponding sealing ring provided on the cover body are used to tighten the cover; then the material is input through the feed port (not marked) on the feed sealing cover 13 for filtration. During the filtration process, steam or hot water (different requirements in different seasons) is introduced through the temperature control jacket provided through the discharge sealing cover 14 to keep the material warm. After being filtered by the filter bag and the filter plate 9, the material is input from the discharge port (not marked) provided on the discharge sealing cover 14 and the corresponding pipeline to the processing device of the subsequent process for further processing; after the filtration is completed, the feed sealing cover 13 and the discharge sealing cover 14 are opened, the filter cavity 6 is turned away for purging and cleaning, and the spare filter cavity 6 is turned over to continue filtering.

[0032] During purging, turn the filter plate 9 over (if filter cloth is provided on the filter plate 9, remove it separately for cleaning and then install it for use), then cover the filter cavity 6 to be purged with the purging upper sealing cover 15 and the purging lower sealing cover, connect the purging pipe 10 to external steam, and the inner cavity of the filter cavity 6, the filter bag and the filter plate 9 can be purged and cleaned; the upper steam purged and the carried material (purging of the filter bag) are transported to a waste collection tank (not shown) outside the body through the material outlet provided on the purging upper sealing cover 15 and the pipe connected thereto, and the lower steam purged and the carried material (purging of the filter plate 9) are transported to a waste collection tank (not shown) outside the body through the material outlet provided on the purging lower sealing cover and the pipe connected thereto; the filter cavity 6 that has been purged and cleaned can continue to filter or be transferred to one side for standby.

[0033] It should be understood that these embodiments are intended only to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the contents of the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of this application.

Claims

1. A filtering device for use in a MOCA production process, characterized in that: It includes a main body with a cylindrical shell, a rotating shaft is provided on the central axis of the shell, a base is provided at the bottom of the rotating shaft, and a cofferdam is provided between the base and the main body; a plurality of support frames are evenly and symmetrically arranged from the middle to the upper part of the rotating shaft, and the support frames are connected and supported with a rotating part, and the rotating part includes a plurality of evenly arranged filter chambers and a cylindrical rotating part side wall connected to the outer periphery of the filter chamber; a filter bag support frame is provided on the upper part of the filter chamber, and a detachable filter plate is provided at the bottom; a purge pipe is fixedly provided on the outer side of the side wall of the filter chamber; a limiter is provided between the side wall of the rotating part and the main body shell, and a cover body bracket is symmetrically arranged on both sides of the upper part and the lower part of the main body shell.

2. The filtering device in the MOCA production process according to claim 1, characterized in that: The filter bag support frame is a perforated plate support frame.

3. The filtering device in the MOCA production process according to claim 1, characterized in that: The filter plate is placed on four support columns symmetrically arranged on the side wall of the filter cavity.

4. The filtering device for MOCA production according to claim 1, characterized in that: The limiter comprises a pull rod, a spring pulled by the pull rod, and a supporting connecting rod controlled by the pull rod and the spring, and a pin is provided on the top end of the supporting connecting rod.

5. The filtering device in the MOCA production process according to claim 1, characterized in that: The purge pipe is arranged outside the filter cavity near the side wall of the rotating part. A pneumatic valve is provided at the connection between the bottom end of the purge pipe and the side wall of the filter cavity, and a quick-connect joint is provided at the upper end of the purge pipe.

6. The filtering device for MOCA production according to claim 1, characterized in that: The upper part of the filter bag support frame is provided with a button hole.

7. The filtering device for MOCA production according to claim 1, characterized in that: The filter plate is provided with a filter cloth.

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