Online purging device for filter element of filter

Abstract

The utility model belongs to the technical field of steel and iron, and relates to an on-line purging device for a filter element of a filter, which comprises two groups of on-line purging facilities which are arranged in parallel and can be switched for use, and each group of purging facilities comprises a front stop valve, a blow-off pipe, a filter, a detachable filter element, a purging pipe, a bleeder and a rear stop valve which are sequentially connected from front to back, differential pressure detection devices are arranged in front of and behind the filter. The filter and the detachable filter element are vertically arranged, the blow-off pipe is arranged on the upstream side of the air flow direction of the filter, and an outlet of the blow-off pipe faces downwards so as to ensure that impurities can be discharged in time. The purge pipe is arranged on the downstream side of the filter in the airflow direction and is connected with external purge gas. The on-line purging device for the filter element of the filter can realize on-line alternate use of two filters, and can obviously reduce the risks of filter blockage and system shutdown. The device does not need to disassemble the filter or interrupt the operation of upstream and downstream equipment in production operation, so that the economic loss caused by system shutdown can be obviously reduced, the manual maintenance cost is greatly saved, and the production efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of steel technology and relates to an online purging device for filter elements. Background Technology

[0002] In the context of rapid industrial development, the requirements for filtration in various production processes are increasingly stringent. Filters, as key equipment, are widely used in numerous fields. After a period of use, traditional filter elements gradually become clogged due to the accumulation of impurities, affecting filtration efficiency and flow rate. When filter elements need cleaning or replacement, it is usually necessary to shut down upstream and downstream equipment and manually disassemble the filter elements for cleaning or replacement. This method is not only time-consuming and labor-intensive but also leads to production interruptions, causing significant economic losses to enterprises. Especially in industries with continuous production, such as the steel industry, shutdowns can affect the progress of the entire production line and even impact product quality and delivery time.

[0003] To address this issue, the industry has been seeking more efficient and convenient methods for filter maintenance. However, traditional maintenance methods are not only inefficient but also costly, failing to meet the continuous and stable requirements of modern industrial production. Therefore, developing a device capable of cleaning and maintaining filter elements without interrupting production is of paramount importance. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an online purging device for filter elements, which is simple and easy to operate, and does not require manual disassembly and installation.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an online purging device for filter cartridges, comprising at least two sets of parallel and switchable online purging facilities, each set of online purging facilities being provided with a pre-shut-off valve, a drain pipe, a filter, a purging pipe, a vent pipe, and a post-shut-off valve in sequence from the gas inlet to the gas outlet of the pipeline; differential pressure detection devices are also provided on the pipelines before and after the filter.

[0006] Optionally, the filter can be a cone filter or a T-shaped filter.

[0007] Optionally, the filter contains a filter element that is removable and installed vertically.

[0008] Optionally, the drain pipe is located upstream of the airflow direction of the filter and has its outlet facing downwards. This drain pipe is connected to a sump pit, depending on the site conditions.

[0009] Optionally, the sewage pipe is also equipped with a primary sewage valve and a secondary sewage valve; a sampling port is provided between the primary sewage valve and the secondary sewage valve, and the sampling port is connected to the sewage pipe through the sampling valve.

[0010] Optionally, the differential pressure detection device is a differential pressure transmitter, with detection points located on both sides of the filter element, and the signal can be transmitted remotely to detect and monitor changes in filter element resistance during the production process.

[0011] Optionally, the purge pipe is located downstream of the filter in the direction of airflow and is connected to external purge gas.

[0012] Optionally, the external purging gas can be nitrogen or vapor.

[0013] Optionally, a pressure transmitter is also installed on the pipeline between the filter and the drain pipe.

[0014] The beneficial effects of this utility model are as follows: This utility model provides an online filter element purging device, which can realize the online alternation of two filters. The online cleaning through an automated system reduces the need for manual operation, saves labor and time costs, has a simple structure, and is easy to operate. It can provide strong support for enterprises to improve production efficiency, reduce costs, and ensure product quality.

[0015] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0016] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0017] Figure 1 This is a flowchart of the present invention;

[0018] Figure 2 This is an installation diagram of the present invention;

[0019] Figure 3 for Figure 2 The left view.

[0020] Reference numerals: 1. First pre-shut-off valve; 2. Filter A; 3. First post-shut-off valve; 4. First primary drain valve; 5. First secondary drain valve; 6. First purge valve; 7. First vent valve; 8. Differential pressure transmitter; 9. First pressure transmitter; 10. Second pre-shut-off valve; 11. Filter B; 12. Second post-shut-off valve; 13. Second primary drain valve; 14. Second sampling valve; 15. Second secondary drain valve; 16. Second purge valve; 17. Second vent valve; 18. Second pressure transmitter; 19. Detailed Implementation

[0021] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0022] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0023] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0024] Please see Figures 1-3 This is an online purging device for filter cartridges, comprising two sets of parallel and switchable online purging facilities. One set of online purging facilities, from the gas inlet to the gas outlet, is sequentially equipped with a first pre-shutdown valve 1, an A filter 2, a first post-shutdown valve 3, a first primary drain valve 4, a first sampling valve 5, a first secondary drain valve 6, a first purging valve 7, a first vent valve 8, and a first pressure transmitter 10. The other set of online purging facilities, from the gas inlet to the gas outlet, is sequentially equipped with a second pre-shutdown valve 11, a B filter 12, a second post-shutdown valve 13, a second primary drain valve 14, a second sampling valve 15, a second secondary drain valve 16, a second purging valve 17, a second vent valve 18, and a second pressure transmitter 19. Differential pressure detection devices are also installed on the pipelines before and after the two sets of filters.

[0025] In this embodiment, the filters are configured in a one-in-one-out configuration, i.e., filter A 2 and filter B 12. When one filter is in use, the other is in standby mode. This method ensures that production will not be interrupted when the filters need cleaning or filter element replacement.

[0026] Furthermore, both filter A 2 and filter B 12 are preferably conical or T-shaped filters, with internal filter elements that are removable. The filters and removable filter elements are vertically arranged in a vertical installation. This arrangement facilitates the cleaning and replacement of the filter elements and also helps to improve filtration efficiency.

[0027] The drain pipe is positioned upstream of the filter in the airflow direction with its outlet pointing downwards to ensure timely discharge of impurities. In this embodiment, the drain pipe is also equipped with a primary drain valve (such as a first primary drain valve 4 or a second primary drain valve 14) and a secondary drain valve (such as a first secondary drain valve 6 or a second secondary drain valve 16). A sampling port is provided between the primary and secondary drain valves, and this sampling port is connected to the drain pipe via a sampling valve (such as a first sampling valve 5 or a second sampling valve 15). This allows for sampling and testing of impurities in the drain pipe when needed.

[0028] The differential pressure detection device is a differential pressure transmitter 9, with detection points located on both sides of the filter element, and the signal can be transmitted remotely. This allows for real-time monitoring and control of changes in filter element resistance during production, enabling timely measures to be taken for cleaning or replacement of the filter element.

[0029] The purge pipe is located downstream of the filter in the airflow direction and is connected to an external purge gas. In this embodiment, the external purge gas is nitrogen or steam. When the filter element needs to be cleaned, the purge valve on the purge pipe (such as the first purge valve 7 or the second purge valve 17) can be opened to send the external purge gas into the filter to purge the filter element.

[0030] In addition, pressure transmitters (such as the first pressure transmitter 10 and the second pressure transmitter 19) are installed on the pipeline between the filter and the drain pipe to monitor the pressure at the filter inlet or outlet.

[0031] The specific working process of this embodiment is as follows:

[0032] Taking filter A2 as an example, when dust-laden gas passes through filter A2 with an 80-mesh filter element, differential pressure transmitter 9 monitors the differential pressure value of filter A2 in real time. When the differential pressure value reaches the set value (e.g., 15 kPa), the system automatically interlocks to open the front and rear shut-off valves of filter B12 (second front shut-off valve 11, second rear shut-off valve 13), and after receiving the signal that it is fully open, interlocks to close the front and rear shut-off valves of filter A2 (first front shut-off valve 1, first rear shut-off valve 3). Then, the system automatically interlocks to open the first vent valve 8 corresponding to filter A2, and closes the first vent valve 8 when the pressure gauge of the first pressure transmitter 10 is ≤1 kPa. After detecting that the first vent valve 8 is fully closed, the system automatically interlocks to open the first secondary drain valve 6 (the first primary drain valve 4 is normally open), and sends purging gas into the process gas pipeline through the purging port to purge the filter element of filter A2. After a certain period of time (e.g., 15 minutes) or after testing the sampling port with a white cloth and finding no obvious impurities, the purging can be stopped and the first and second drain valves 6 can be closed. At this time, filter A 2 enters the standby state. The above process is performed alternately by filter A 2 and filter B 12, which can achieve continuous online use.

[0033] Through the description of the specific embodiments above, the structure and features of this utility model have become clear. The online filter cartridge purging device of this utility model has advantages such as simple structure, convenient operation, and high degree of automation, and can provide strong support for enterprises to improve production efficiency, reduce costs, and ensure product quality.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An online purging device for filter cartridges, characterized in that: It includes at least two sets of parallel and switchable online purging facilities. Each set of online purging facilities is provided with a pre-shut-off valve, a drain pipe, a filter, a purging pipe, a vent pipe, and a post-shut-off valve in sequence from the gas inlet to the gas outlet. Differential pressure detection devices are also installed on the pipes before and after the filter.

2. The filter element online purging device according to claim 1, characterized in that: The filter is either a cone filter or a T-shaped filter.

3. The filter element online purging device according to claim 2, characterized in that: The filter contains a filter element, which is removable and installed vertically.

4. The filter element online purging device according to claim 1, characterized in that: The drain pipe is located upstream of the airflow direction of the filter and has its outlet facing downwards. This drain pipe is connected to the sump pit depending on the site conditions.

5. The filter element online purging device according to claim 4, characterized in that: The sewage pipe is also equipped with a primary sewage valve and a secondary sewage valve; a sampling port is provided between the primary sewage valve and the secondary sewage valve, and the sampling port is connected to the sewage pipe through the sampling valve.

6. The filter element online purging device according to claim 1, characterized in that: The differential pressure detection device is a differential pressure transmitter. The detection points are located on both sides of the filter element, and the signal can be transmitted remotely to detect and monitor changes in filter element resistance during the production process.

7. The filter element online purging device according to claim 1, characterized in that: The purge pipe is located downstream of the filter in the direction of airflow and is connected to external purge gas.

8. The filter element online purging device according to claim 7, characterized in that: The external purging gas is nitrogen or vapor.

9. The filter element online purging device according to claim 1, characterized in that: A pressure transmitter is also installed on the pipeline between the filter and the sewage pipe.

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