Metal filter element cleaning device of process exhaust system

Abstract

A metal filter element cleaning device of a process exhaust system comprises an upper cover plate and a side wall. A motor is installed on the upper cover plate, a gear of the motor is connected with a gear of a lifting device, the lifting device is connected with a gravity lifting appliance through a steel wire rope, and the lower end face of the gravity lifting appliance is clamped into and separated from a clamping groove of the filter element shielding cover plate; the side wall is connected with a cleaning liquid interface and a nozzle; the filter element solves the problem that the purification effect is reduced by attachments after the filter element of the screen purifier is used for a long time, and only the filter element can be replaced, and the service life of the filter element of the screen purifier is prolonged. The use shows that the cleaning device is simple and quick to operate, and can reliably and efficiently clean the filter element of the silk screen purifier for a long time.

Description

Technical Field

[0001] This invention relates to the technical field of cleaning high-efficiency filter elements and purifier filter elements in post-process exhaust systems, and specifically to a metal filter element cleaning device for a process exhaust system. Background Art

[0002] The wire mesh purifier and medium and high efficiency filter in the tail gas system of the post-treatment process are important tail gas purification units in the process. The filter elements of the wire mesh purifier and the medium efficiency filter are made of stainless steel wire mesh. The main function is to intercept the mist droplets and aerosols in the tail gas. For a long time, the filter element will be blocked, and the differential pressure of the wire mesh purifier or the medium efficiency filter element will increase and the purification effect will deteriorate. The filter element needs to be replaced to maintain the stability of the system. The replaced filter element has a high radioactivity level and a large volume, which puts a certain pressure on waste treatment and storage. In view of this problem, after manually flushing the stainless steel filter element with 2mol / L washing acid, the dosage level of the filter element is greatly reduced, the amount of cleaning liquid is less, and the cleaning effect is obvious. At the same time, the cleaned filter element can be reused. A stainless steel filter element cleaning device is now designed to clean the filter element with reduced purification effect and failure, so as to realize the reuse of the filter element, extend the service life of the filter element, and reduce the cost of radioactive waste treatment and storage. Summary of the invention

[0003] The purpose of the present invention is to develop a cleaning device for process exhaust filter elements to extend the service life of wire mesh purifiers and center filter elements, and the operation of the tool must meet the requirements of safety, convenience, and efficiency.

[0004] The technical solution of the present invention is as follows: a metal filter element cleaning device for a process exhaust system, comprising an upper cover plate and a side wall; a motor is installed on the upper cover plate, the gear of the motor is connected to the gear of a lifting device, the lifting device is connected to a gravity hanger through a wire rope, and the lower end surface of the gravity hanger is engaged with and disengaged from the slot of the filter element shielding cover plate;

[0005] The cleaning liquid interface and the nozzle are connected to the side wall;

[0006] The upper cover plate of the cleaning device is connected and fixed to the side wall by locking bolts.

[0007] The hook of the gravity spreader contracts and re-bounces through its own structure.

[0008] There is a peep window on the side wall.

[0009] An isolation plate is installed on the gravity lifter. When the gravity lifter rises to the top, the isolation plate contacts the isolation platform on the side wall, dividing the internal space of the metal filter element cleaning device of the process exhaust system into a lower cleaning chamber and an upper control chamber, and sealing and isolating them.

[0010] An induction probe is installed on the isolation table.

[0011] There are lifting ears on the upper cover.

[0012] The side walls are located on the base.

[0013] There is a gasket at the bottom of the side wall.

[0014] The motor passes through the upper cover plate and is connected to the gear below via a bearing.

[0015] The significant effect of the present invention is that the cleaning device for the filter element of the wire mesh purifier is developed and processed, which solves the problem that the filter element of the wire mesh purifier has been used for a long time and the purification effect is reduced due to attachments, and the filter element can only be replaced, thereby extending the service life of the filter element of the wire mesh purifier. The use shows that the cleaning device is simple and quick to operate, and can clean the filter element of the wire mesh purifier for a long time, reliably and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the filter element;

[0017] Figure 2 is a schematic diagram of a cleaning device;

[0018] Figure 3 This is a demonstration diagram of the device;

[0019] Figure 4 A top view of the installation of the cleaning pipe for the cleaning container;

[0020] Figure 5 It is a top view of the spreader structure;

[0021] Figure 6 This is the main view of the spreader structure;

[0022] Figure 7 The overall schematic diagram of cleaning is shown below;

[0023] Marks and corresponding parts names in the attached drawings:

[0024] In the figure: 1 motor, 2 lifting device, 3 lifting ear, 4 fastening bolt, 5 upper cover plate, 6 laser sensor, 7 cleaning liquid interface, 8 peep window, 9 gravity hanger, 10 nozzle, 11 side wall, 12 shielding cover plate, 13 isolation plate, 14 isolation platform, 15 base, 16 sealing gasket. DETAILED DESCRIPTION

[0025] Many specific details are described in the following description to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present application, so the present application is not limited by the specific implementation disclosed below.

[0026] The terms used in one or more embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of the present application. The singular forms of "a", "said" and "the" used in one or more embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of the present application refers to and includes any or all possible combinations of one or more associated listed items.

[0027] It should be understood that, although the terms first, second, etc. may be used to describe various information in one or more embodiments of the present application, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of the present application, the first may also be referred to as the second, and similarly, the second may also be referred to as the first.

[0028] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0029] A cleaning device for metal filter element of process exhaust system comprises an upper cover plate 5 and a side wall 11. The upper cover plate 5 of the cleaning device is connected and fixed to the side wall 11 by a locking bolt 4. A motor 1 is installed on the upper cover plate 5. The motor 1 rotates the gear below through the shield through the bearing. The gear of the motor 1 is connected to the gear of the lifting device 2. The wire rope on the lifting device 2 is connected to the gravity hanger 9. The hook of the gravity hanger 9 can be retracted and re-elasticized through its own structure. The lower end surface of the gravity hanger 9 can be engaged with and disengaged from the slot of the filter element shielding cover plate 12. A peep window 8 is opened on the side wall 11. Through the peep window 8, the connection between the gravity hanger 9 and the shielding cover plate 12 can be observed and confirmed. An isolation plate 13 is installed on the gravity hanger 9. When the gravity hanger 9 rises to the top, the isolation plate 13 contacts the isolation platform 14 on the side wall 11, and the internal space of the cleaning device for metal filter element of process exhaust system is divided into a lower cleaning chamber and an upper control chamber, and the isolation is performed. An induction probe 6 is installed on the isolation platform 14, and the induction probe 6 confirms whether the gravity hanger 9 has risen to the right position through induction.

[0030] The cleaning liquid interface 7 and the nozzle 10 are connected to the side wall 11, and different cleaning agents can be connected through a flexible joint. The pressure gauge on the pipeline confirms that the pressure meets the information requirements. The cleaning agent is sprayed at high pressure through the nozzle 10 to perform high-pressure flushing on the stainless steel filter element.

[0031] There are lifting lugs 3 on the upper cover plate 5, and the lifting lugs 3 are connected with a crane, so that the cleaning device can be moved. The cleaning device upper cover plate 5 can be hoisted for maintenance.

[0032] The side wall 11 is located on the base 15, and a sealing gasket 16 is provided at the bottom of the side wall 11; the cleaning device is designed with three sealing gaskets. The first one is designed at the base 15 of the cleaning device, and is used to isolate the inside of the cleaning device from the outside world during the cleaning of the filter element. The second one is at the upper part of the base 15 of the cleaning device. After the cleaning device is used, the gravity hoist 9 is dropped to the bottom, and the isolation plate 13 of the gravity hoist 9 is located above the sealing gasket 16, which can isolate the internal space of the cleaning device. The third one is at the top of the cleaning device. When the gravity hoist rises to the top in a gas state, the space where the lifting device is located can be isolated from the cleaning space.

[0033] When the purifier filter element needs to be cleaned, confirm that the filter element to be cleaned has been switched to the standby group, close the inlet valve of the filter, and slightly open the outlet valve to ensure a certain negative pressure in the pit of the filter element. The gas and liquid generated during cleaning can be collected in the filter pit in a direction.

[0034] Remove the top cover of the filter, lift the cleaning container, move the shielding plug to above the filter element shielding plug, operate the motor to lower the hoist, and observe the positioning and docking of the gravity hoist 9 and the shielding plug through the peep window 8. After the docking is completed, lower the cleaning container and fix it.

[0035] Operate the motor to slowly lift the filter element, and it will automatically stop rising when it reaches the limit.

[0036] Use a metal hose to connect the acid or steam and other media to the live joint, and adjust the cleaning medium pressure through a pressure gauge - the pressure of aqueous media such as acids and alkalis is greater than 0.2MPa, and the pressure of compressed air and steam media is greater than 0.4MPa; the cleaning medium cleans the purifier core through 8 cleaning nozzles, and the cleaning waste liquid flows into the system through the holes of the purifier, effectively preventing the outflow of radioactive waste liquid. The single cleaning waste liquid is controlled within 20L. At the same time, the check valve can effectively prevent radioactive substances from entering the metal hose; after cleaning, use A3 compressed air to purge the filter element to remove the residual accumulated liquid in the filter element. During the purge, pay attention to the negative pressure value of the process exhaust system not being lower than the control range. After the purge is completed, lower the filter element back into the filter, disconnect the shielding plug of the hanger and the filter element, and the cleaning is completed.

[0037] The above description is only a preferred embodiment of this patent and is not intended to limit this patent. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this patent should be included in the scope of protection of this patent.

[0038] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the present application is not limited by the described action sequence, because according to the present application, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present application.

[0039] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0040] The preferred embodiments of the present application disclosed above are only used to help explain the present application. The optional embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of the present application. The present application selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present application, so that those skilled in the art can understand and use the present application well.

Claims

1. A metal filter element cleaning device for a process exhaust system, characterized in that: It comprises an upper cover plate (5) and a side wall (11); a motor (1) is mounted on the upper cover plate (5); a gear of the motor (1) is connected to a gear of a lifting device (2); the lifting device (2) is connected to a gravity hanger (9) via a steel wire rope; the lower end surface of the gravity hanger (9) is engaged with and disengaged from a slot of a filter element shielding cover plate (12); The side wall (11) is connected to a cleaning liquid interface (7) and a spray head (10).

2. A metal filter element cleaning device for a process exhaust system according to claim 1, characterized in that: The upper cover plate (5) of the cleaning device is connected and fixed to the side wall (11) via locking bolts (4).

3. The metal filter element cleaning device for a process exhaust system according to claim 1, characterized in that: The hook of the gravity sling (9) contracts and re-bounces through its own structure.

4. A metal filter element cleaning device for a process exhaust system according to claim 1, characterized in that: A peep window (8) is provided on the side wall (11).

5. The metal filter element cleaning device for a process exhaust system according to claim 1, characterized in that: An isolation plate (13) is installed on the gravity hoist (9). When the gravity hoist (9) rises to the top, the isolation plate (13) contacts the isolation platform (14) on the side wall (11), dividing the internal space of the process exhaust system metal filter cleaning device into a lower cleaning chamber and an upper control chamber, and sealing and isolating them.

6. A metal filter element cleaning device for a process exhaust system according to claim 5, characterized in that: An induction probe (6) is installed on the isolation platform (14).

7. The metal filter element cleaning device for a process exhaust system according to claim 1 is characterized in that: The upper cover plate (5) is provided with a lifting lug (3).

8. The metal filter element cleaning device for a process exhaust system according to claim 1 is characterized in that: The side wall (11) is located on the base (15).

9. A metal filter element cleaning device for a process exhaust system according to claim 8, characterized in that: A sealing gasket (16) is provided at the bottom of the side wall (11).

10. The metal filter element cleaning device for a process exhaust system according to claim 1, characterized in that: The motor (1) passes through the upper cover plate (5) via a bearing and is connected to the gear below.

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