Process gas pipeline joint filter

Abstract

The utility model relates to the technical field of filters, in particular to a process gas pipeline joint filter which comprises a steel pipe, a filter element is mounted in the steel pipe, a first flange is arranged at the end, far away from a gas inlet, of the steel pipe, a second flange is connected to the flange, far away from the gas inlet, of the first flange, and the second flange is used for sealing the other end of the steel pipe; the side wall of the steel pipe fixedly communicates with a diversion elbow; a filter element is mounted in the steel pipe; a supporting seat is fixed on the outer side of the filter element and is propped against the inner wall of the steel pipe; a guide cylinder is fixed on one side, far away from the second flange, of the filter element and connected with the filter element; a filter screen is mounted in the filter element; a fixing plate is fixed to the side, close to the second flange, of the filter element, a plurality of filter holes are formed in the middle of the filter element in an array mode, the flow guide cylinder is arranged to change the flow direction of airflow, the flow resistance of the filter is reduced, the service life of the filter screen is prolonged, the filter element and the filter screen are detachably designed, and the filter screen is convenient to replace and clean.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically a filter for the connection of process gas pipelines. Background Technology

[0002] If the welding of equipment pipelines is completed immediately and then directly connected to the equipment, various foreign objects such as sand, scale, and debris carried by the process gas are very likely to enter the equipment. Once these foreign objects enter, they can easily cause malfunctions such as jamming and blockage. This will not only interfere with the normal operation of the equipment, but in severe cases, it can also directly cause physical damage to the equipment. To avoid the above situations, a special filter is usually installed upstream of the equipment to effectively block these foreign objects from entering the equipment, thereby ensuring the safe and stable operation of the equipment.

[0003] During actual system operation, polymers and debris gradually accumulate on the filter screen, or the filter screen may develop stress corrosion cracks due to long-term erosion by corrosive components contained in the process gas, resulting in a decrease in filtration efficiency. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a filter for the connection of process gas pipeline.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a filter for a process gas pipeline connection, comprising a steel pipe, a filter element installed inside the steel pipe, a first flange located away from the gas inlet end of the steel pipe, a second flange connected to the first flange away from the gas inlet flange, the second flange being used for sealing the other end of the steel pipe; a flow guide elbow fixedly connected to the side wall of the steel pipe; a filter element installed inside the steel pipe; the filter element is cylindrical, with a support fixed to its outer side, the support abutting against the inner wall of the steel pipe; a flow guide tube fixed to the side of the filter element away from the second flange, one end of the flow guide tube abutting against the inside of the steel pipe, the other end converging and connected to the filter element; a filter screen installed inside the filter element; a fixing plate fixed to the side of the filter element near the second flange, the fixing plate having an L-shaped cross-section, its L end expanding outward along the edge, the fixing plate being installed between the first flange and the second flange along the edge; multiple filter holes arranged in an array in the middle of the filter element.

[0006] As a further preferred embodiment of this utility model, the support base facing the steel pipe is an elastic structure, and the part of the elastic structure that abuts against the inner wall of the steel pipe is made of elastic material. The support base has multiple rings fixed to the outer wall of the filter element to prevent the filter element from vibrating during filtration and to facilitate removal and replacement.

[0007] As a further preferred embodiment of this utility model, a sight glass plate is fixed to the second flange, and the sight glass plate is used to observe the inside of the filter element.

[0008] As a further preferred embodiment of this utility model, differential pressure installation ports are provided at the flow guide elbow and the steel pipe inlet, with built-in differential pressure transmitters. The differential pressure changes of the fluid passing through the filter can be directly monitored in the control room, and the filter element blockage can be judged in a timely manner based on the differential pressure warning prompts.

[0009] As a further preferred embodiment of this utility model, the inner surface of the filter element near the second flange is fixed with mounting grooves on the upper and lower surfaces. The mounting grooves are C-shaped cylinders, and pull rods are fitted into the upper and lower mounting grooves to facilitate the removal of the filter element.

[0010] As a further preferred embodiment of this utility model, the filter screen is connected to the filter element by fixing bolts. Multiple fixing bolts are arranged circumferentially at any end of the steel pipe. A gasket is installed between the bolt head near the second flange and the filter screen. The nut of the fixing bolt is installed between the bolt head and the inner wall of the filter element. The edge of the guide tube converging end is installed between the bolt head away from the second flange and the filter screen, which facilitates the separation and replacement of the filter screen and the individual cleaning of the filter element.

[0011] As a further preferred embodiment of this utility model, the guide tube is bowl-shaped, and multiple annular sealing rings are fixed at the joint between it and the steel pipe to facilitate the guidance and sealing of gas.

[0012] As a further preferred embodiment of this utility model, the cross-section of the filter hole is trapezoidal, and the diameter of the filter hole narrows along the airflow direction. By setting the above structure, the flow velocity at the joint between the filter screen and the filter element is reduced, and the impact on the filter screen is reduced. This can both support the filter screen and prevent fragments from entering the equipment after the filter screen is damaged.

[0013] Technical effects and advantages of the utility model:

[0014] 1. By setting up a flow guide tube to change the airflow direction, the flow resistance of the filter is reduced, thereby ensuring that the filter effect is not reduced due to the flow resistance it generates and the flow interference it causes, and extending the service life of the filter screen.

[0015] 2. Both the filter element and the filter screen are designed to be detachable, with a high degree of integration, and are easy to replace the filter screen and clean the filter element. The double-layer structure allows for separate cleaning, extending the service life of the filter. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a filter at the connection of a process gas pipeline according to the present invention.

[0017] Figure 2This is a schematic diagram of the internal structure of a filter at the connection of a process gas pipeline according to the present invention.

[0018] Figure 3 This is a schematic diagram of the filter screen in a filter at the connection of a process gas pipeline according to the present invention.

[0019] Figure 4 This is a cross-sectional view of the filter screen in a filter at the connection of a process gas pipeline according to this utility model.

[0020] Figure 5 This is a schematic diagram of the flow guide tube in a filter at the connection of a process gas pipeline according to the present invention.

[0021] Figure 6 This is a schematic diagram of the support base in a filter at the connection of a process gas pipeline according to the present invention.

[0022] Figure 7 This is a schematic diagram of the connecting bolts in a filter at the connection point of a process gas pipeline according to this utility model.

[0023] The attached diagram is labeled as follows: 1. Fixing plate; 2. Filter element; 3. Support base; 4. Flow guide tube; 5. Filter screen; 6. No. 1 flange; 7. No. 2 flange; 8. Steel pipe; 9. Flow guide elbow; 10. Sight glass plate; 11. Differential pressure installation port; 12. Installation groove; 13. Tie rod; 14. Fixing bolt; 15. Gasket; 401. Sealing ring; 601. Filter hole. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] See appendix Figure 1-3As shown, a filter for a process gas pipeline connection includes a steel pipe 8, a filter element 2 installed inside the steel pipe 8, a first flange 6 located away from the gas inlet end of the steel pipe 8, and a second flange 7 connected to the first flange 6 away from the gas inlet flange, the second flange 7 being used for sealing the other end of the steel pipe 8; a guide elbow 9 is fixedly connected to the side wall of the steel pipe 8; the filter element 2 is installed inside the steel pipe 8; the filter element 2 is cylindrical, and a support base 3 is fixed to its outer side, the support base 3 being connected to the inner wall of the steel pipe 8. The filter element 2 is abutted against the wall; a guide tube 4 is fixed on the side away from the second flange 7, one end of the guide tube 4 abuts against the inside of the steel pipe 8, and the other end is constricted and connected to the filter element 2; a filter screen 5 is installed inside the filter element 2; a fixing plate 1 is fixed on the side of the filter element 2 near the second flange 7, the fixing plate 1 has an L-shaped cross section, and its L end expands outward along the edge. The L end of the fixing plate 1 is installed between the first flange 6 and the second flange along the edge; multiple filter holes 601 are arranged in an array in the middle of the filter element 2.

[0026] like Figure 6 As shown in this embodiment of the utility model, the support base 3 facing the steel pipe 8 is an elastic structure, and the part of the elastic structure that abuts against the inner wall of the steel pipe 8 is made of elastic material. The support base 3 has four rings fixed to the outer wall of the filter element 2 to prevent the filter element 2 from vibrating during filtration and to facilitate removal and replacement.

[0027] Furthermore, in this embodiment, the support base 3 is T-shaped and made of high-temperature resistant rubber.

[0028] like Figure 1 and 2 As shown in this embodiment of the present invention, the second flange 7 is fixed with a sight glass plate 10, which is used to observe the inside of the filter element 2.

[0029] like Figure 1 As shown in this embodiment of the utility model, a differential pressure installation port 11 is provided at the flow guide elbow 9 and the inlet of the steel pipe 8, with a built-in differential pressure transmitter. The differential pressure change of the fluid passing through the filter can be directly monitored in the control room. The filter element blockage can be judged in time according to the differential pressure warning prompt. The differential pressure transmitter is a common technology and will not be described in detail here.

[0030] like Figure 1 As shown in this embodiment of the present invention, the inner surface of the filter element 2 near the second flange 7 is fixed with mounting grooves 12, which are C-shaped cylinders. Pull rods 13 are fitted into the upper and lower mounting grooves 12 to facilitate the removal of the filter element 2.

[0031] During operation in this embodiment, the pull rod 13 is detachable and does not affect the observation inside the viewing mirror plate 10.

[0032] like Figure 1 and Figure 7 As shown in this embodiment of the utility model, the filter screen 5 is connected to the filter element 2 by fixing bolts 14. The fixing bolts 14 have multiple circumferentially arranged at any end of the steel pipe 8. A gasket 15 is installed between the screw head of the fixing bolt 14 near the second flange 7 and the filter screen 5. The nut of the fixing bolt 14 is installed between the screw head of the fixing bolt 14 and the inner wall of the filter element 2. The edge of the converging end of the guide tube 4 is installed between the screw head of the fixing bolt 14 away from the second flange 7 and the filter screen 5, which facilitates the separation and replacement of the filter screen 5 and the individual cleaning and replacement of the filter element 2.

[0033] like Figure 5 As shown in this embodiment of the utility model, the guide tube 4 is bowl-shaped, and multiple annular sealing rings 401 are fixed at the joint between it and the steel pipe 8 to facilitate the guidance and sealing of gas. The sealing rings 401 are made of [material not specified].

[0034] like Figure 3 and Figure 4 As shown in the embodiment of this utility model, the cross-section of the filter hole 601 is trapezoidal, and the diameter of the filter hole 601 is narrowed along the airflow direction. By setting the above structure, the flow velocity at the joint between the filter screen 5 and the filter core 2 is reduced, and the impact on the filter screen 5 is reduced. It can both support the filter screen 5 and prevent fragments from entering the device after the filter screen 5 is damaged.

[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A process gas duct connection filter comprising a steel pipe in which a filter cartridge is installed inside, characterized in that: The steel pipe is provided with a first flange away from the gas inlet end, the first flange is connected with a second flange away from the gas inlet end flange, and the second flange is used for sealing the other end of the steel pipe; the steel pipe is fixedly connected with a flow guide elbow on the side wall; and a filter core is installed in the steel pipe; The filter core is in a cylindrical shape, and a support seat is fixed to the outer side of the filter core; the support seat is in abutment with the inner wall of the steel pipe; The filter core is fixed with a flow guide cylinder away from the second flange side, one end of the flow guide cylinder is in abutment with the inside of the steel pipe, the other end is convergent, and is connected with the filter core; and a filter screen is installed in the filter core; The filter core is fixed with a fixed plate close to the second flange side, the fixed plate is in an L-shaped cross section, the L-shaped end of the fixed plate is expanded outward, and the L-shaped end of the fixed plate is installed between the first flange and the second flange; A plurality of filter holes are arranged in the middle of the filter core.

2. The process gas pipeline connection filter according to claim 1, wherein the support seat on the side of the steel pipe is of an elastic structure, the abutment part between the elastic structure and the inner wall of the steel pipe is made of an elastic material, and a plurality of rings are fixed to the outer wall of the filter core.

3. The process gas pipeline connection filter according to claim 1, wherein the second flange is fixed with a sight glass plate, and the sight glass plate is used for observing the inside of the filter core.

4. The process gas pipeline connection filter according to claim 1, wherein differential pressure installation openings are arranged at the flow guide elbow and the inlet of the steel pipe, and a differential pressure transmitter is arranged in the differential pressure installation openings.

5. The process gas pipeline connection filter according to claim 1, wherein installation grooves are fixed to the inner surface of the filter core close to the second flange, the installation grooves are C-shaped cylinders, and pull rods are clamped in the installation grooves.

6. The process gas pipeline connection filter according to claim 1, wherein the filter screen is connected to the filter core through fixed bolts, a plurality of fixed bolts are arranged at any end of the steel pipe in a circumferential direction, a gasket is arranged between the screw head of the fixed bolt close to the second flange and the filter screen, and the nut of the fixed bolt and the inner wall of the filter core; and the convergent end of the flow guide cylinder is arranged between the screw head of the fixed bolt away from the second flange and the filter screen.

7. A process gas duct connection filter according to claim 1, wherein: The flow guide cylinder is in a bowl shape, and a plurality of annular sealing rings are fixed to the abutment part between the flow guide cylinder and the steel pipe.

8. The process gas pipeline connection filter according to claim 1, wherein the filter hole is in a trapezoidal cross section, and the hole diameter of the filter hole is convergent along the airflow direction.

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