CN104226036A - Novel bag support keel and application thereof in pulse-jet bag-type dust remover - Google Patents

Abstract

The invention discloses a novel bag support keel. The novel bag support keel consists of external longitudinal supporting reinforcing steel bars and internal supporting members, wherein each end part of each internal supporting member is equidistantly fixed at the inner sides of the external longitudinal supporting reinforcing steel bars through spot welding, so as to form a radial star-shaped internal supporting structure. According to the novel bag support keel, each end part of each internal supporting member is equidistantly fixed on the external longitudinal supporting reinforcing steel bars through spot welding, so that only the longitudinal supporting reinforcing steel bars are in supporting contact with a bag, the lateral supporting contact with the bag is completely avoided, then, the efficiency of dust removal is effectively increased, the wear and fatigue damage to the bag caused by the keel are reduced, and the service life of the bag is prolonged. The invention simultaneously discloses application of the keel in a pulse-jet bag-type dust remover.

Description

New type bag support keel and its application in pulse jet bag filter

technical field

The invention relates to the field of industrial dust removal, in particular to a novel bag support keel in the field of industrial dust removal and its application in pulse jet bag dust collectors.

Background technique

The bag dust removal technology is a mature solid dust and particle collection and industrial flue gas purification technology. Among them, the pulse jet bag filter has become the main application technology for industrial dust collection and flue gas purification in my country, especially ultrafine dust control. The bag filter uses the filtration principle to separate solid particles and gases. The key filter element is the component formed by the bag and the supporting keel. The cloth bag is generally made of filter material with specific air permeability and adaptable to different temperature and chemical environment processed by functional resin fiber through acupuncture or spunlace process, and the supporting keel is welded by carbon steel or stainless steel wire. When the dust removal system is working, the fan is used to draw the flue gas that needs to be treated into the dust collector, the cloth bag intercepts the dust, and the keel supports the cloth bag to maintain its shape in a negative pressure state and provide space to discharge the purified gas. In the pulse injection system, when the pressure difference reaches a certain level, the system starts the dust removal program, and uses the reverse high-pressure pulse air jet to remove the collected dust filter cake from the surface of the bag and fall into the ash hopper below the dust collector.

Because of its high dust removal efficiency and adaptability, especially the ability to collect ultra-fine dust, the bag filter has occupied a dominant position in the control of industrial dust emissions. With the continuous improvement of our country's requirements for energy saving and emission reduction, higher requirements are constantly put forward for bag dust removal technology.

At present, the bag filter generally uses a bag with a round cross section. The supporting keel is generally supported by a round steel ring, and multiple longitudinal steel wires are welded equidistantly outside the steel ring at specific intervals to form a supporting frame. As a key component of the dust collector, the supporting keel directly affects the filtration and purification efficiency of the dust collector. At present, the traditional circular keel on the market uses circular steel rings or star-shaped steel rings as support rings to support longitudinal steel bars. Long-term high-pressure pulse injection of these support rings will cause local wear and fatigue damage to the longitudinal direction with relatively poor strength of the bag, directly Affect the life of the bag; the impact of the bag on the support ring during blowing will also directly lead to the excessive discharge of instantaneous dust; It is easy to be partially attached to the horizontal support ring supporting the keel. If the keel is long, dozens of support rings will generate great resistance, and it is extremely difficult to extract the keel.

Contents of the invention

In order to solve the above-mentioned technical problems, the object of the present invention is to provide a new type of cloth bag supporting keel and its application, which can completely avoid the lateral support contact with the cloth bag on the basis of a small increase in cost, effectively improve the dust removal efficiency, and reduce the impact of the keel on the cloth bag. wear and fatigue damage, and prolong the service life of the bag.

In order to solve the problems of the technologies described above, the present invention adopts the following technical solutions:

The new bag support keel, which is applied to the bag filter, is composed of external longitudinal support steel bars and a plurality of internal supports arranged at intervals. It is characterized in that the ends of each internal support are fixed at equal intervals on the external longitudinal The inner side of the supporting steel bars forms a supporting keel with a radial star-shaped internal supporting structure.

Wherein, the internal support part includes a central fixing part and a plurality of connecting parts, one end of the connecting part is welded on the central fixing part, and the other end point is welded on the corresponding external longitudinal support steel bar, and the connecting parts are made of steel wire Double-strand or 8-shaped cross-section steel wire formed by bending 180°. .

Wherein, the central fixing member is a steel ring with a circular section or a stamped steel ring.

Wherein, the connecting pieces are equidistantly distributed on the central fixing piece, and the total number is any number greater than 7.

Wherein, the connecting piece is an L-shaped component, one end of which is welded to the intermediate fixing piece, and the bent outer end is spot-welded to the external longitudinal support steel bar.

Wherein, the external longitudinal support reinforcement is a reinforcement with a circular cross section.

Among them, the diameter of the external longitudinal support reinforcement is 1.5-2.5 times the diameter of the single-strand reinforcement of the connector of the internal support or 0.75-1.25 times the width of the 8-shaped section of the connector, so that after the L-shaped member is welded to the external longitudinal support, The connections of internal supports are wholly or mostly hidden inside the longitudinal reinforcement.

Wherein, the materials of the external longitudinal support steel bars and the internal support members include various grades of carbon steel and stainless steel, and after the keel is made, anti-rust, galvanized, and plastic-plated treatments are carried out.

The invention also discloses the application of a new bag support keel supporting a pleated bag in a pulse-jet bag filter, which is characterized in that the keel used by the bag filter in conjunction with the pleated bag has the above-mentioned structure.

Compared with the prior art, the present invention has the following beneficial effects:

The present invention provides a brand-new concept of cloth bag support keel, which replaces the traditional round keel. Since the ends of the internal support members are fixed on the external longitudinal support steel bars at equal intervals by spot welding, only the longitudinal support steel bars have support contact with the bag, completely avoiding The horizontal support and contact with the bag can effectively improve the dust removal efficiency, reduce the wear and fatigue damage of the keel to the bag, and prolong the service life of the bag; The material and processing cost of the matching keel, while the support keel only supports the bag with longitudinal steel bars, completely eliminates the unnecessary contact and wear of the keel to the bag, and reduces the cohesion and friction of the bag to the keel parts after use, greatly reducing the difficulty of keel disassembly .

Description of drawings

Fig. 1 is a schematic diagram of the front structure of the inner support member corresponding to 10 longitudinal reinforcement keels of the present invention;

Fig. 2 is a schematic diagram of the back structure of the internal support member corresponding to 10 longitudinal steel bars of the present invention;

Fig. 3 is a schematic diagram of the front structure of the inner support member corresponding to 8 longitudinal reinforcement keels of the present invention;

Fig. 4 is a schematic diagram of the front structure of the inner support member corresponding to 12 longitudinal reinforcement keels of the present invention;

Fig. 5 is a schematic diagram of the structure of the dust bag keel of the present invention;

Fig. 6 is a schematic diagram of the combination of the keel of the dust-removing cloth bag and the pleated cloth bag of the present invention.

Description of the main components of the drawings

10 External longitudinal support reinforcement

12 Internal supports

121 center fixing

122 connectors

13 keel top cover

14 pleated bag body

15 Pleat pocket opening.

Detailed ways

In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

Please refer to FIG. 1 , FIG. 2 and FIG. 3 , which are structural schematic diagrams of three kinds of internal support members of the bag keel according to the present invention. The inner support 12 includes a central fixing part 121 and a plurality of connecting parts 122, one end of each connecting part 122 is welded on the central fixing part 121, and the other end is welded on the corresponding outer longitudinal support bar 10, each connecting part 122 Keeping the same spacing to form a star-shaped radial structure, the connecting piece 122 can be a double-strand steel wire formed by bending the steel wire by 180°; it can also be a steel bar with a figure-eight cross section.

In the above embodiments, the central fixing member 121 can be a circular steel ring, but the shape is not limited thereto.

In order to enhance the firmness of the connecting piece 122 welded on the external longitudinal support steel bar 10, as a preferred implementation, the connecting piece 122 is designed as an L-shaped component, one end of the component is welded on the intermediate fixing piece 121, and the other end of the bending Welded on the inner side of the external longitudinal support reinforcement 10.

The inner support member 12 can be cut or stamped from a steel plate of appropriate thickness to form a radial multi-arm star-shaped structural support member.

Please refer to Figure 5, which is a schematic diagram of the structure of the bag supporting keel. The new cloth bag support keel includes a top cover 13, an external longitudinal support steel bar 10, and a plurality of internal support members 12 arranged at intervals. shaped star-shaped internal support structure. In this embodiment, the outer longitudinal support reinforcement 10 is a single-strand steel wire, the inner support ring 121 of the inner support member 12 is preferably a round-section steel bar, and the connector 122 can be a double-strand steel wire formed by bending the steel wire at 180°; it can also be A steel bar with a figure-eight cross section. As a preferred embodiment, the diameter of the steel bar used as the external longitudinal support bar 10 is 1.5-2.5 times the diameter of the single-strand steel bar of the connector or 0.75-1.25 times the cross-sectional width of the 8-shaped steel bar, so that the end of the connector 122 is welded to the outside After the longitudinal support reinforcement 10 is installed, the welding point is hidden inside the longitudinal reinforcement. After the keel is loaded into the cloth bag, only the longitudinal reinforcement has supporting contact with the cloth bag, so as to avoid and reduce the unnecessary contact of the internal support reinforcement to the cloth bag.

In the above embodiment, the materials of the outer longitudinal support bars 10 and the inner support members 12 can be selected from various grades of carbon steel and stainless steel, and after they are made into keels, they can also be treated with rust prevention, galvanization, and plastic plating.

During production, a plurality of connecting pieces 122 are welded at equal intervals on the central fixing piece 121 to form an internal support piece 12, and the same number of longitudinal steel bars are respectively welded to the ends of each connecting piece 122, and then the keel roof is welded on top of the longitudinal steel bars 13 forms the head of the keel, and the bottom of the longitudinal steel bar is vertically folded inward to form the bottom of the keel of the dust-removing bag to obtain a complete keel of the dust-removing bag. Longitudinal steel bars and internal support 12, top cover 13 and bottom cover can be made of carbon steel or stainless steel, suitable for common circular cloth bags and pleated cloth bags of the same size.

The dust bag keel can be made into two or several sections according to the needs. The end of each section to be connected is equipped with a specially designed connection assembly that is convenient for on-site connection, so that the connected keel can reach the required total length of the keel, and the connected keel The outline of the connecting part has all the characteristics of the keel body.

The keel design of the present invention can be used for a traditional circular cloth bag of corresponding size to form a filter assembly, and can also be used to form an assembly with a pleated cloth bag of the same size. When the filter assembly is composed of ordinary round bags, the fatigue damage of the ordinary keel support ring to the bag can be completely avoided.

Fig. 6 is a schematic diagram of the combination of the bag supporting keel and the pleated cloth bag made with the above-mentioned preferred supporting member.

In the present invention, the internal support 12 has only point contact with the longitudinal steel bar, the connecting piece 122 and the welding spot are hidden inside the longitudinal steel bar, and after the keel is loaded into the cloth bag 14, only the longitudinal steel bar 10 has supporting contact with the cloth bag 14, completely avoiding the horizontal deformation of the keel. The additional dust emission caused by the wear and impact of the support on the bag is easy to install and disassemble, and the production cost and transportation cost of the keel are greatly reduced.

The above is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present invention can easily think of changes or Replacement should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims (9)

1. The new bag support keel, which is applied to the bag filter, is composed of external longitudinal support steel bars and multiple internal supports arranged at intervals. It is characterized in that the ends of each internal support are fixed at equal intervals by spot welding The outer longitudinal supports the inner side of the steel bars, forming a supporting keel with a radial star-shaped inner support structure. 2. The new cloth bag supporting keel according to claim 1, wherein the internal support includes a central fixing piece and a plurality of connecting pieces, one end of the connecting piece is welded on the central fixing piece, and the other end is welded On the corresponding external longitudinal support reinforcement, the connecting piece is a double-strand or 8-shaped reinforcement steel wire formed by bending the steel wire by 180°. 3. The novel cloth bag supporting keel according to claim 2, characterized in that, the central fixing member is a steel ring with a circular section or a stamped steel ring. 4. The novel cloth bag supporting keel according to claim 2, characterized in that, said connecting pieces are equidistantly distributed on the central fixing piece, and the total number is any number greater than 7. 5. The novel cloth bag supporting keel according to any one of claims 2 to 4, characterized in that, the connector is an L-shaped member, one end of which is welded on the middle fixing member, and the bent outer end Spot welded to the external longitudinal support reinforcement. 6. The novel cloth bag supporting keel according to claim 1 or 2, characterized in that, the external longitudinal supporting reinforcement is a circular cross-section reinforcement. 7. The novel cloth bag supporting keel according to claim 5, characterized in that the diameter of the outer longitudinal support reinforcement is 1.5-2.5 times the diameter of the single-strand reinforcement of the connector of the inner support or 0.75-2.5 times the width of the 8-shaped section of the connector. 1.25 times, so that after the L-shaped member is welded to the external longitudinal support, all or most of the connecting parts of the internal support are hidden inside the longitudinal reinforcement. 8. The novel cloth bag support keel according to claim 1 or 2, characterized in that, the materials of the external longitudinal support reinforcement and the internal support members include carbon steel and stainless steel of various labels, and rust prevention, Galvanized, plastic-plated treatment. 9. The application of the pleated bag supporting the new bag support keel in the pulse jet bag filter, characterized in that the keel used by the bag filter in conjunction with the pleated bag has the characteristics described in any one of the above claims 1 to 8 Structure.