On-line pressure relief device of bag filter

Abstract

The utility model relates to the technical field of filtering equipment, in particular to an on-line pressure relief device of a bag filter, which comprises a shell, a filter bag is mounted in the shell, a filter bag framework is arranged on the outer wall of the filter bag, a feeding pipe and a cleaning pipe are connected to the upper part of one side of the shell, and a discharging pipe and a back flushing pipe are connected to the bottom of the other side of the shell. A top cover is installed on the top of the shell, and a three-way pipe is installed on the top of the top cover. In the on-line pressure relief device of the bag filter, aiming at the defects or defects that an existing bag filter is not subjected to on-line pressure relief during regular disassembly and cleaning in the operation process, and a purging facility or an equipment body is not cleaned regularly, an on-line pressure relief facility convenient to operate is provided for the shell of the bag filter; a single inlet pipe at an inlet is changed into two pipelines, and a pipeline is additionally arranged at a liquid outlet pipe orifice, so that online cleaning and purging are facilitated, the cleaning time is shortened, the yield is improved, and the production, operation and maintenance and process costs are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of filtration equipment, and specifically to an on-line pressure relief device for a bag filter. Background Technique

[0002] As an efficient and flexible filtration equipment, the bag filter has been widely used in the impurity removal process of liquid materials in the production of wet-process phosphoric acid refining, water-soluble fertilizers, and iron phosphate and other chemical production processes. It effectively intercepts impurities in the liquid through the filter bag installed inside, thereby ensuring the purity of the output liquid. However, the traditional bag filter has certain limitations in design, especially in terms of on-line pressure relief and cleaning of the equipment, showing obvious deficiencies.

[0003] Specifically, traditional bag filters usually do not have on-line pressure relief and cleaning devices. During long-term use, this will lead to a decrease in the filtration efficiency of the filter bag and an increase in the internal pressure of the equipment, thereby affecting the filtration effect and the service life of the equipment. In addition, when the filter bag needs to be replaced or the equipment needs to be cleaned, due to the pressure in the pipeline, there are significant safety hazards during the operation process, and it is easy to cause the spraying of liquid materials during disassembly, which not only affects the on-site operation environment but also increases the loss of raw and auxiliary materials.

[0004] Therefore, aiming at the deficiencies of traditional bag filters in terms of pressure relief and cleaning, a new type of on-line pressure relief and cleaning device is urgently needed to improve the use efficiency and safety of the equipment, reduce the loss of liquid materials during the operation process, so as to meet the requirements of high efficiency, safety, and environmental protection in modern chemical production. Content of the Utility Model

[0005] The purpose of the utility model is to provide an on-line pressure relief device for a bag filter to solve the problem that existing bag filters usually do not have on-line pressure relief and cleaning devices, which will lead to a decrease in the filtration efficiency of the filter bag and an increase in the internal pressure of the equipment during long-term use, thereby affecting the filtration effect and the service life of the equipment as mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides an on-line pressure relief device for a bag filter, including a housing. A filter bag is installed inside the housing, and a filter bag skeleton is arranged on the outer wall of the filter bag. The upper part of one side of the housing is connected with a feed pipe and a cleaning pipe, the bottom of the other side of the housing is connected with a discharge pipe and a backwashing pipe, the top of the housing is installed with a top cover, a three-way pipe is installed on the top of the top cover, the bottom end of the three-way pipe is connected with the inside of the housing, the top end of the three-way pipe is connected with a pressure gauge, and an exhaust port is arranged on one side of the three-way pipe.

[0007] Preferably, a base is installed at the bottom of the housing.

[0008] Preferably, the top cover is detachably covered on the top of the housing by means of a buckle.

[0009] Preferably, the feed pipe and the cleaning pipe are arranged in parallel. One end of the feed pipe and the cleaning pipe penetrates the outer wall of the housing and enters the filter bag, and the ends of the feed pipe and the cleaning pipe are combined into one outlet.

[0010] Preferably, a first valve is installed at the end of the tee pipe close to the pressure gauge, and a second valve is installed at the tee pipe close to the exhaust port.

[0011] Preferably, the discharge pipe is arranged horizontally, the backwashing pipe is arranged vertically, and the bottom end is installed on the discharge pipe. Switch valves are installed on both the discharge pipe and the backwashing pipe.

[0012] Preferably, switch valves are installed on both the feed pipe and the cleaning pipe.

[0013] Preferably, the filter bag skeleton includes a rectangular outer frame, and a plurality of blocking rods are installed on the front and back sides of the outer frame. The filter bag skeleton is arranged between the blocking rods on both sides.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] In the online pressure relief device of the bag filter, aiming at the deficiencies or defects of the existing bag filter during operation, such as no online pressure relief during regular disassembly and cleaning, no regular cleaning and purging facilities, or problems with the equipment body, an easy-to-operate online pressure relief facility is provided on the housing of the bag filter. The single inlet pipe at the inlet is changed to two pipelines, and a new pipeline is added at the liquid outlet. Compared with the prior art, it has the characteristics of safe, efficient, and convenient cleaning, purging operations, which is beneficial for online cleaning, purging, shortening the cleaning time, increasing the output, and reducing the production operation and maintenance and process costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall structural schematic diagram of the present utility model;

[0017] Figure 2 is the partial structural schematic diagram of the present utility model;

[0018] The meanings of the various reference numerals in the figure are as follows:

[0019] 1. Housing; 11. Feed pipe; 12. Cleaning pipe; 13. Outlet; 14. Discharge pipe; 15. Backwashing pipe; 2. Filter bag; 3. Filter bag skeleton; 31. Outer frame; 32. Blocking rod; 4. Base; 5. Top cover; 51. Buckle; 6. Tee pipe; 61. First valve; 62. Second valve; 63. Pressure gauge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] The present utility model provides an on-line pressure relief device for a bag filter, as Figure 1 - Figure 2 shown, which includes a housing 1. A filter bag 2 is installed inside the housing 1. A filter bag skeleton 3 is arranged on the outer wall of the filter bag 2. A feed pipe 11 and a cleaning pipe 12 are connected to the upper part of one side of the housing 1. A discharge pipe 14 and a backwashing pipe 15 are connected to the bottom of the other side of the housing 1. A top cover 5 is installed on the top of the housing 1. A three-way pipe 6 is installed on the top of the top cover 5. The bottom end of the three-way pipe 6 is connected to the inside of the housing 1. The top end of the three-way pipe 6 is connected to a pressure gauge 63. An exhaust port is arranged on one side of the three-way pipe 6. Through the three-way pipe and the exhaust port arranged on the top cover, on-line pressure relief of the filter is realized. When the pressure inside the filter is too high, the pressure can be released in time through the exhaust port, ensuring that the filter operates within a safe pressure range, effectively preventing equipment damage or operation hazards caused by excessive pressure. The installation of the pressure gauge 63 enables the operator to monitor the pressure inside the filter in real time, providing accurate data support for timely adjusting operation parameters or taking pressure relief measures. The design of the on-line pressure relief device avoids the spraying of liquid materials caused by the internal pressure during the disassembly process of traditional filters, thus eliminating potential safety hazards, protecting the safety of operators, and at the same time reducing the loss of raw and auxiliary materials. Through the cleaning pipe 12 and the backwashing pipe 15, the filter can be conveniently cleaned and backwashed on-line without disassembling the equipment, greatly improving the maintenance efficiency and cleaning effect of the equipment. Due to the realization of on-line pressure relief and cleaning functions, the downtime of the equipment is reduced, the continuous working ability of the filter is improved, and thus the overall production efficiency is enhanced.

[0022] In this embodiment, a base 4 is installed at the bottom of the housing 1 to facilitate the support and fixation of the housing 1.

[0023] Specifically, the top cover 5 is detachably covered on the top of the housing 1 through a buckle 51, facilitating the installation, fixation and disassembly of the top cover 5.

[0024] Furthermore, the feed pipe 11 and the cleaning pipe 12 are arranged in parallel. One ends of the feed pipe 11 and the cleaning pipe 12 penetrate the outer wall of the housing 1 and enter the filter bag 2. The ends of the feed pipe 11 and the cleaning pipe 12 are combined into one outlet 13.

[0025] Further, a first valve 61 is installed at the end of the three-way pipe 6 close to the pressure gauge 63 to facilitate controlling the switch for pressure measurement, and a second valve 62 is installed at the three-way pipe 6 close to the exhaust port to facilitate controlling the exhaust operation.

[0026] Further, the discharge pipe 14 is horizontally arranged, the backwashing pipe 15 is vertically arranged, and the bottom end thereof is installed on the discharge pipe 14. Switch valves are installed on both the discharge pipe 14 and the backwashing pipe 15 to facilitate opening and closing of the discharge pipe 14 and the backwashing pipe 15.

[0027] Further, switch valves are installed on both the feed pipe 11 and the cleaning pipe 12 to facilitate opening and closing of the feed pipe 11 and the cleaning pipe 12.

[0028] Further, the filter bag skeleton 3 includes a rectangular outer frame 31, and a plurality of blocking rods 32 are installed on the front and back sides of the outer frame 31. The filter bag skeleton 3 is arranged between the blocking rods 32 on both sides to facilitate supporting and positioning of the filter bag 2.

[0029] When the on-line pressure relief device of the bag filter of the present utility model is in use, first check whether the first valve 61 of the pressure gauge 63 is in the open state and whether the second valve 62 is in the closed state. After confirmation, the second valve 62 is closed and the first valve 61 of the pressure gauge 63 is in the open position. The cleaning pipe 12 is closed, the backwashing pipe 15 is closed, and the top cover 5 is confirmed to be tightly covered; after confirmation; the filtered liquid passes through the feed pipe 11, is filtered by the filter bag 2, and then the clear liquid flows out through the backwashing pipe 15; after the pressure indication of the pressure gauge 63 rises, the valve of the feed pipe 11 is closed, the valve of the discharge pipe 14 is closed, the second valve 62 is slowly opened, after pressure relief, the top cover 5 is disassembled; the filter bag 2 and the filter bag skeleton 3 are taken out, and the filter bag 2 is cleaned; after completion, it can be reused.

[0030] Close the valves of the inlet and outlet pipelines, open the valve of the backwashing pipe 15, open the valve of the cleaning pipe 12, after the cleaning pressure drops, close the valve of the backwashing pipe 15, open the second valve 62, compressed air enters from the cleaning pipe 12 (a separate access port is reserved on the pipeline), discharges from the second valve 62, and blows the filter bag 2 with compressed air in the positive direction. After about 5 minutes, close the cleaning pipe 12, open the backwashing pipe 15 or the second valve 62, and blow the filter bag 2 with compressed air in the reverse direction. After about 5 minutes, the cleaning, positive blowing, and reverse blowing are completed, and then it can be put into use after feeding.

[0031] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An online pressure relief device for a bag filter, comprising a housing (1), characterized in that: A filter bag (2) is installed inside the shell (1), and a filter bag frame (3) is provided on the outer wall of the filter bag (2); a feed pipe (11) and a cleaning pipe (12) are connected to the upper part of one side of the shell (1), and a discharge pipe (14) and a back-blowing pipe (15) are connected to the bottom of the other side of the shell (1); a top cover (5) is installed on the top of the shell (1), and a three-way pipe (6) is installed on the top of the top cover (5); the bottom end of the three-way pipe (6) is connected to the inside of the shell (1), the top end of the three-way pipe (6) is connected to a pressure gauge (63), and one side of the three-way pipe (6) is provided with an exhaust port.

2. The bag filter online pressure relief device according to claim 1 is characterized in that: A base (4) is installed at the bottom of the shell (1).

3. The bag filter online pressure relief device according to claim 1 is characterized in that: The top cover (5) is detachably covered on the top of the housing (1) via a buckle (51).

4. The bag filter online pressure relief device according to claim 1, characterized in that: The feed pipe (11) and the cleaning pipe (12) are arranged in parallel, one end of the feed pipe (11) and the cleaning pipe (12) penetrates the outer wall of the shell (1) and enters the filter bag (2), and the ends of the feed pipe (11) and the cleaning pipe (12) are combined into an outlet (13).

5. The bag filter online pressure relief device according to claim 1, characterized in that: A first valve (61) is installed at the end of the three-way pipe (6) close to the pressure gauge (63), and a second valve (62) is installed at the end of the three-way pipe (6) close to the exhaust port.

6. The bag filter online pressure relief device according to claim 1, characterized in that: The discharge pipe (14) is arranged horizontally, and the back-blowing pipe (15) is arranged vertically, with the bottom end mounted on the discharge pipe (14). Both the discharge pipe (14) and the back-blowing pipe (15) are equipped with switch valves.

7. The bag filter online pressure relief device according to claim 1, characterized in that: The feed pipe (11) and the cleaning pipe (12) are both equipped with switch valves.

8. The bag filter online pressure relief device according to claim 1, characterized in that: The filter bag skeleton (3) comprises a rectangular outer frame (31), a plurality of blocking rods (32) are installed on the front and back sides of the outer frame (31), and the filter bag skeleton (3) is arranged between the blocking rods (32) on both sides.

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