Filter bag for filtering flue gas

Abstract

The utility model relates to a novel flue gas filtration filter bag manufacturing method, which comprises a bag head, the bottom of the bag head is sleeved with an outer side bag body, the outer side of the bottom of the outer side bag body is sleeved with an outer support sleeve, the inner side of the bottom of the outer side bag body is sleeved on the outer side of a bottom end cover, the bottom end cover is sleeved with an inner side bag body, and the inner side bag body is sleeved on the inner side end cover. The top of the inner side bag body is sleeved with a conical hanging cap, the conical hanging cap is in a round bowl shape, a hook is arranged at the top end of the conical hanging cap, the top end of the inner side bag body extends to the upper side of the conical hanging cap, and the conical hanging cap is sleeved with a first clamp. The top end of the inner side bag body is stably and detachably fixed through a simple structure by using the conical hanging cap, the first clamp and the mounting ring, and the bottom of the inner side bag body is locked through a simple structure by using the locking elastic frame and the locking groove in a matched mode.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of filter bags, and particularly relates to a filter bag for flue gas filtration. BACKGROUND

[0002] As an important filter element, filter bags are widely applied in the fields of dust removal of steel, cement and electric power. The traditional filter bag structure usually comprises a bag head, a bag bottom and a bag body, and a metal framework support structure is arranged in the bag body to ensure the shape and filter area. However, with the increase of dust removal efficiency and the emergence of problems such as aging of dust removal equipment, problems such as large filter wind speed and insufficient filter area also occur, and therefore, considering the reconstruction design space and large cost of the dust remover, a filter bag for flue gas filtration is provided. SUMMARY

[0003] This section aims to summarize some aspects of the embodiments of the application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the application.

[0004] In view of the following technical problems in the prior art: problems such as large filter wind speed and insufficient filter area also occur, and considering the reconstruction design space and large cost of the dust remover.

[0005] To solve the above technical problems, the application provides the following technical scheme: a filter bag for flue gas filtration, comprising a bag head, an outside bag body arranged on the inner side of the bag head, an outside support sleeve arranged on the outer side of the bottom of the outside bag body, the bottom of the outside bag body being sleeved on the outer side of a bottom end cover, the bottom end cover being sleeved with an inside bag body, a conical hanging cap being arranged on the top of the inside bag body, the conical hanging cap being in the shape of a round bowl, a hook being arranged on the top end of the conical hanging cap, the top end of the inside bag body extending to the upper side of the conical hanging cap, a clamp one being sleeved on the conical hanging cap, the clamp one being pressed on the top end of the inside bag body, a mounting ring being arranged on the top end of the clamp one, a fixing bolt being threadedly connected to the mounting ring, and the bottom end of the fixing bolt being threadedly connected to the conical hanging cap.

[0006] As a preferred technical scheme of the filter bag for flue gas filtration, the bottom end cover comprises an inner end cover and an outer end cover, the outer end cover is arranged on the outer side of the bottom end of the inner end cover, and the two ends of the outer end cover are open, and the opening of one end is larger than that of the other end.

[0007] The end of the outer end cover with the smaller opening is fixedly connected to the inner end cover.

[0008] The outer side of the top of the bottom end cover is concavely provided with a locking groove, the top of the inner side of the clamp two is uniformly provided with a plurality of locking elastic frames, the locking elastic frames correspond to the locking groove, and the locking elastic frames are in U-shaped;

[0009] The locking elastic frames press part of the inner side bag body into the inner side of the locking groove, so that the inner side bag body is relatively fixed with the bottom end cover.

[0010] The inner side of the clamp two is provided with a plurality of sliding grooves, the sliding grooves are correspondingly connected with the locking elastic frames, the opposite surfaces of the inner side of the sliding grooves are respectively provided with limiting grooves, the two edges of the locking elastic frames are provided with limiting rods, and the limiting rods are slidably connected with the limiting grooves.

[0011] The locking elastic frames are elastic, when the locking elastic frames extend to the inner side of the clamp two, the two edges of the locking elastic frames are folded to the middle, and the limiting rods slide in the limiting grooves.

[0012] The inner side of the locking elastic frame is provided with an abutting frame, the abutting frame is connected with the two edges of the locking elastic frame, a plurality of locking bolts are threadedly connected on the clamp two, and one end of the locking bolt is movably connected with the abutting frame.

[0013] The locking bolt can extrude the locking elastic frame to extend.

[0014] The bottom end of the outer supporting sleeve is clamped with the clamp three.

[0015] The clamp three extrudes the outer supporting sleeve to shrink, so that the outer supporting sleeve and the bottom end cover clamp and fix the bottom of the inner side bag body.

[0016] The filter bag for filtering flue gas has the following advantages: through the use of the conical hanging cap, the clamp one and the mounting ring, the top end of the inner side bag body is stably and detachably fixed through a simple structure, through the cooperation of the locking elastic frame and the locking groove, the bottom of the inner side bag body is locked through a simple structure, through the use of the bag head, the outer supporting sleeve and the bottom end cover, the bottom end of the outer side bag body is locked by the bottom end cover and the clamp two, and the filter bag has two filtering structures through the above structure, the fixing structure is simple and efficient, and the effective filtering area is greatly expanded. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings. Among them:

[0018] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0019] Figure 2 It is a schematic diagram of the partial enlarged structure of part A in the present application. Figure 1

[0020] Figure 3 It is a schematic diagram of the partial enlarged structure of part B in the present application. Figure 1

[0021] Figure 4 It is a schematic diagram of the structure of the bottom end cover of the present application.

[0022] The drawings are as follows: 1, bag head; 2, outer bag body; 3, conical hanging cap; 4, clamp one; 5, inner bag body; 6, outer support sleeve; 7, clamp two; 8, bottom end cover; 81, inner end cover; 82, outer end cover; 9, clamp three; 10, mounting ring; 11, fixing bolt; 12, locking groove; 13, locking elastic frame; 14, abutting frame; 15, locking bolt; 16, sliding groove; 17, limiting rod; 18, limiting groove. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail in combination with the drawings of the specification.

[0024] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0025] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. In this specification, "in one embodiment" does not mean the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0026] ​​Thirdly, the present application is described in detail in combination with the schematic diagram, in the detailed description of the embodiments of the present application, for the convenience of description, the cross-sectional view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application herein. In addition, the three-dimensional spatial dimensions of length, width and depth should be included in actual production.

[0027] As Figures 1 to 4 shown, the present application provides a filter bag for flue gas filtration, comprising a bag head 1, the inner side of the bag head 1 is provided with an outer bag body 2, the outer side of the bottom of the outer bag body 2 is provided with an outer support sleeve 6, the inner side of the bottom of the outer bag body 2 is sleeved on the outer side of the bottom end cover 8, the bottom end cover 8 is sleeved with the inner bag body 5, the top of the inner bag body 5 is provided with a conical hanging cap 3, the conical hanging cap 3 is a round bowl shape, the top end of the conical hanging cap 3 is provided with a hook, the top end of the inner bag body 5 extends to the upper side of the conical hanging cap 3, the conical hanging cap 3 is sleeved with a clamp 4, the clamp 4 is pressed on the top end of the inner bag body 5, the top end of the clamp 4 is provided with a mounting ring 10, the mounting ring 10 is threadedly connected with a fixing bolt 11, the bottom end of the fixing bolt 11 is threadedly connected with the conical hanging cap 3.

[0028] The bottom end cover 8 comprises an inner end cover 81 and an outer end cover 82, the outer side of the bottom end of the inner end cover 81 is provided with the outer end cover 82, the two ends of the outer end cover 82 are open, and the opening of one end is larger than that of the other end;

[0029] The smaller opening end of the outer end cover 82 is fixedly connected with the inner end cover 81.

[0030] The outer side of the top of the bottom end cover 8 is recessed with a locking groove 12, the top of the inner side of the clamp 7 is uniformly provided with a plurality of locking elastic frames 13, the locking elastic frames 13 correspond to the locking groove 12, and the locking elastic frames 13 are U-shaped;

[0031] The locking elastic frames 13 press part of the inner bag body 5 into the inner side of the locking groove 12, so that the inner bag body 5 is relatively fixed with the bottom end cover 8.

[0032] The inner side of the clamp 7 is provided with a plurality of sliding grooves 16, the sliding grooves 16 are correspondingly connected with the locking elastic frames 13, the inner side of the sliding groove 16 is provided with a limiting groove 18 on two opposite surfaces, the locking elastic frame 13 is provided with a limiting rod 17 on two edges, and the limiting rod 17 is slidably connected with the limiting groove 18;

[0033] The locking elastic frame 13 is elastic, when the locking elastic frame 13 extends and elongates to the inner side of the clamp 7, the two edges of the locking elastic frame 13 fold to the middle, and the limiting rod 17 slides in the limiting groove 18.

[0034] The locking elastic frame 13 is internally provided with an abutting frame 14 connected to two edges of the locking elastic frame 13, and a plurality of locking bolts 15 are threadedly connected to the clamp two 7, one end of the locking bolt 15 being movably connected to the abutting frame 14;

[0035] The locking bolt 15 can extrude and extend the locking elastic frame 13.

[0036] The bottom end of the outer support sleeve 6 is clamped with the clamp three 9;

[0037] The clamp three 9 extrudes and shrinks the outer support sleeve 6, so that the outer support sleeve 6 and the bottom end cover 8 clamp and fix the bottom of the inner bag body 5.

[0038] The outer bag body 2 and the inner bag body 5 adopt polyester fiber, PPS fiber, P84 fiber, PI fiber, aramid fiber, PTFE fiber, etc. The filter bag is divided into two parts, the internal felt and the external felt can be made of the same material or different materials, and the production includes the following steps:

[0039] S1: After the fibers are opened, mixed, carded, laid, and networked, they are respectively subjected to one pre-needling and one main needling in a pre-needling machine and a main needling machine, the pre-needling density is 60-80 stitches / cm 2 , the needling depth is 11-15 mm; the main needling density is 350-400 stitches / cm 2 , the needling depth is 6-8 mm;

[0040] S2: The pre-needling felt is subjected to water jet reinforcement:

[0041] S2.1: The filter base felt with a grammage of 200-600 g / m 2 is obtained, wherein the water jet pressure is 260-360 bar, and the speed is 5-8 m / min;

[0042] S2.2: The filter base felt with a grammage of 200-600 g / m 2 is obtained, wherein the main needling density is 400-450 stitches / cm 2 , the needling depth is 6-8 mm, and the speed is 4-5 m / min;

[0043] S3: After the water jet reinforcement or the needling reinforcement, the base felt is subjected to singeing treatment, and the singeing speed is 16-26 m / min;

[0044] S4: The finishing agent is configured, the finishing agent contains 8%-12% polytetrafluoroethylene emulsion, 4%-6% silicone oil 285 emulsion, and 2%-6% waterproof agent; after being immersed in the finishing agent, the finishing agent is rolled by a roller, wherein the roller pressure is 5-8 bar, and the liquid rate is 50-70%;

[0045] S5: The felt material after impregnation is dried and shaped in an oven to obtain the finished filter material with a grammage of 240-650 g / m2, wherein the oven temperature is set to 150-300°C and the oven speed is 3-6 m / min;

[0046] S6: The shaped felt material is cut according to the specifications to form the outer cylinder and the inner cylinder, wherein the outer cylinder corresponds to a cylinder with a diameter of 130 mm or 160 mm; the inner cylinder is conical with a top diameter of 80-100 mm and a bottom diameter of 100-130 mm, and the height of the inner cylinder is generally two-thirds of the height of the outer cylinder.

[0047] S7: The top of the inner bag body is fixed with a conical hat and a clamp; the bottom is fixed with a ring-shaped end cover and a clamp, and the clamp is fixed to the inner ring of the ring-shaped end cover.

[0048] S8: The top of the outer bag body is fixed with a bag head, and the bottom is fixed with a ring-shaped end cover and a clamp, and the clamp is fixed to the outer ring of the ring-shaped end cover.

[0049] The embodiment is specifically: the flue gas is introduced from the bottom of the inner bag body 5, and the flue gas is filtered in sequence through the inner bag body 5 and the outer bag body 2, so that the inner bag body 5 is cleaned.

[0050] It should be understood that during the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of this disclosure, without undue experimentation.

[0051] It should be noted that the above examples are only used to illustrate the technical solutions of the present application and not to limit it, and although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A filter bag for filtering flue gas, characterized by: The utility model provides a bag head (1), the inside of bag head (1) is provided with outside bag body (2), the outside of bottom of outside bag body (2) is provided with outer support sleeve (6), the inside of bottom of outside bag body (2) is sleeved on the outside of bottom end cover (8), the inside of bottom end cover (8) is sleeved on inside bag body (5), the top of inside bag body (5) is provided with conical hanging cap (3), conical hanging cap (3) is round bowl shape, the top end of conical hanging cap (3) is provided with hook, the top end of inside bag body (5) extends to the upside of conical hanging cap (3), the hoop no.

2. The filter bag for filtering flue gas according to claim 1, characterized in that: The bottom end cover (8) includes an inner end cover (81) and an outer end cover (82), the outer side of the bottom end of the inner end cover (81) is provided with the outer end cover (82), and the two ends of the outer end cover (82) are open, and the opening of one end is larger than that of the other end.

3. The filter bag for filtering flue gas according to claim 1, characterized in that: The outer side of the top of the bottom end cover (8) is recessed with a locking groove (12), and the top of the inner side of the hoop (7) is uniformly provided with a plurality of locking elastic frames (13) corresponding to the locking groove (12), and the locking elastic frame (13) is U-shaped.

4. The filter bag for filtering flue gas according to claim 3, characterized in that: The inner side of the hoop (7) is provided with a plurality of sliding grooves (16) corresponding to the locking elastic frame (13).

5. The filter bag for filtering flue gas according to claim 4, characterized in that: The inner side of the sliding groove (16) is provided with a limiting groove (18) on two opposite surfaces, and the limiting rod (17) is provided on the two edges of the locking elastic frame (13).

6. The filter bag for filtering flue gas according to claim 4, characterized in that: The inner side of the locking elastic frame (13) is provided with an abutting frame (14) connected to the two edges of the locking elastic frame (13), and a plurality of locking bolts (15) are threadedly connected to the hoop (7), and one end of the locking bolt (15) is movably connected to the abutting frame (14).

7. The filter bag for filtering flue gas according to claim 1, characterized in that: The bottom end of the outer support sleeve (6) is clamped with the hoop (9).

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