Tunnel kiln flue gas dust removal device

Abstract

The utility model relates to the technical field of flue gas dust removal, and discloses a tunnel kiln flue gas dust removal device which comprises an air duct, an air inlet is formed in the right end of the air duct, an air outlet is formed in the left end of the air duct, a bottom plate is fixedly connected to the bottom end of the air duct, an annular connecting piece is fixedly connected to the bottom end of the bottom plate, and a dust collection cylinder is arranged on the inner side of the annular connecting piece. The top end of the air duct is provided with a placement groove, the inner side of the placement groove is provided with a cover plate, the top end of the cover plate is fixedly connected with a driving motor, the output end of the driving motor penetrates through and extends to the inner side of the air duct, the outer side of the output end of the driving motor is fixedly connected with a fan, and the air duct comprises an upper half part and a lower half part; according to the utility model, the lugs are arranged, the lugs and the cover plate are connected through the bolts, so that quick disassembly and assembly can be realized, the cover plate, the driving motor and the fan can be taken out together, dust attached to the fan surface of the fan can be cleaned, and compared with the prior art, convenience and quickness are realized, and time is saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to tunnel kiln flue gas dust removal technical field, concretely is a tunnel kiln flue gas dust removal device. BACKGROUND

[0002] Tunnel kiln is by refractory material, heat preservation material and building material and is built in the inside equipped with kiln car and so on carrying tool with tunnel similar kiln, is the modernization continuous firing heat engineering equipment, tunnel kiln is generally a long straight line shape tunnel, its both sides and top have fixed wall and dome, bottom track that is running on the kiln car, combustion equipment sets up in the middle two sides of tunnel kiln, constitutes fixed high temperature zone - firing zone, the high temperature flue gas of combustion under the action of tunnel kiln front chimney or induced draft fan, along tunnel flows to the kiln head direction, preheats gradually the product that enters the kiln, this segment constitutes the preheating zone of tunnel kiln, the cold air is blown into the kiln tail of tunnel kiln, cools the product of the latter section in tunnel kiln, and the cold air that is blown in flows through the product and is heated, then is extracted and sent into the dryer as the heat source of drying green body, this segment constitutes the cooling zone of tunnel kiln.

[0003] The flue gas generated by tunnel kiln firing sample generally needs to be treated by dust removal and desulfurization to meet the emission standard of flue gas, and then the flue gas is discharged, the existing dust removal methods include cyclone dust removal, electrostatic dust removal and bag dust removal, etc., wherein in the cyclone dust removal process, the fan is easy to be contaminated with dust, if not cleaned regularly, the working load of the driving device will be increased, and the electric energy is wasted, and the existing equipment is mostly inconvenient to disassemble the fan, therefore, a tunnel kiln flue gas dust removal device is proposed to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] (I) technical problem solved

[0005] The utility model aims at solving the problem that in the cyclone dust removal process, the fan is easy to be contaminated with dust, if not cleaned regularly, the working load of the driving device will be increased, and the electric energy is wasted, and the existing equipment is mostly inconvenient to disassemble the fan, and proposes a tunnel kiln flue gas dust removal device.

[0006] (II) technical scheme

[0007] The technical scheme of the utility model for solving the above technical problem is as follows:

[0008] The utility model provides a tunnel kiln flue gas dust removal device, including the air duct, the left end of air duct is the air inlet, the right end of air duct is the air outlet, the bottom of air duct is fixedly connected with the bottom plate, the bottom of bottom plate is fixedly connected with the annular connecting piece, the inner side of annular connecting piece is provided with dust collecting cylinder, is equipped with the dust hole on the annular connecting piece, the top of cover plate is fixedly connected with the lug, the lug is fixedly connected with the air duct through bolt,

[0009] The air duct comprises an upper half and a lower half, the upper half of the air duct is in a rectangular cross section, the lower half of the air duct is in a circular truncated cone shape with a wide upper part and a narrow lower part, the upper half and the lower half of the air duct are separated by a partition plate, the partition plate is provided with a through hole for connecting the upper half and the lower half of the air duct, and the fan is located in the upper half of the air duct.

[0010] Based on the above technical scheme, the utility model still can make improvement as follows.

[0011] Preferably, the dust collecting cylinder is threadedly connected to the inner side of the annular connecting piece.

[0012] Preferably, the dust hole is in a circular arc shape, the diameter difference between the inner circle and the outer circle of the circular arc shape is 2 cm, and the position of the dust hole is matched with the lower half of the air duct.

[0013] (Three) beneficial effects

[0014] Compared with the prior art, the technical scheme of the present application has the following beneficial technical effects:

[0015] The utility model discloses a lug is set, and the lug and the cover plate are connected through bolt and can be quickly disassembled, can take out the cover plate, drive motor and fan together, and the dust adhered to the fan face is cleaned, which is convenient, time-saving and labor-saving compared with the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is the whole structure schematic diagram of the utility model;

[0017] Figure 2 It is the relative position relation structure schematic diagram of drive motor and fan of the utility model;

[0018] Figure 3 It is the relative position relation structure schematic diagram of air duct and placing groove of the utility model;

[0019] Figure 4 It is the relative position relation structure schematic diagram of annular connecting piece and dust hole of the utility model.

[0020] In the diagram: 1. Air duct; 2. Base plate; 3. Annular connecting plate; 4. Dust collection cylinder; 5. Dust collection hole; 6. Placement slot; 7. Cover plate; 8. Drive motor; 9. Fan; 10. Ear plate. Detailed Implementation

[0021] 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.

[0022] In the embodiments, by Figures 1-4 A dust removal device for flue gas in a tunnel kiln is provided, comprising a duct 1, an air inlet at the left end of the duct 1, an air outlet at the right end of the duct 1, a base plate 2 fixedly connected to the bottom end of the duct 1, an annular connecting piece 3 fixedly connected to the bottom end of the base plate 2, a dust collection cylinder 4 provided on the inner side of the annular connecting piece 3, a dust collection hole 5 opened on the annular connecting piece 3, a placement groove 6 opened at the top end of the duct 1, a cover plate 7 placed on the inner side of the placement groove 6, a drive motor 8 fixedly connected to the top end of the cover plate 7, the output end of the drive motor 8 passing through and extending to the inner side of the duct 1, a fan 9 fixedly connected to the outer side of the output end of the drive motor 8, and an ear piece 10 fixedly connected to the top end of the cover plate 7, the ear piece 10 being fixedly connected to the duct 1 by bolts.

[0023] The air duct 1 includes an upper half and a lower half. The upper half of the air duct 1 has a rectangular cross-section, and the lower half of the air duct 1 has a frustum-shaped cross-section that is wider at the top and narrower at the bottom. The upper half and the lower half of the air duct 1 are separated by a partition. The partition has through holes for connecting the upper half and the lower half of the air duct 1. The fan 9 is located in the upper half of the air duct 1.

[0024] With the above setup, dust-laden flue gas enters the upper rectangular duct from the left-hand air inlet of duct 1. The drive motor 8 rotates the fan 9, forcing the airflow to accelerate to the left. The negative pressure generated by the fan 9 enhances the intake efficiency. At the same time, the airflow forms local turbulence at the baffle due to the through-holes, promoting inertial collisions of large particles.

[0025] When the airflow enters the lower half of the circular table-shaped air duct through the partition hole, the inclined angle of the inner wall of the lower half of the circular table guides the airflow to form a centrifugal motion, and the dust particles are separated from the airflow under the action of gravity and centrifugal force, slide along the inner wall of the lower half, and the settled dust enters the dust collecting cylinder 4 through the dust falling hole 5 on the annular connecting piece 3. The rigid fixing of the annular connecting piece 3 and the bottom plate 2 forms a continuous flow guide surface, avoiding dust accumulation dead angle, and the airflow completing dust removal is discharged from the right end of the air duct 1. When the machine is stopped, the dust collecting cylinder 4 can be removed for cleaning without interrupting the main structure of the air duct 1. It should be noted that a sealing ring is arranged between the placing groove 6 and the cover plate 7 to prevent gas overflow. The ear piece 10 and the cover plate 7 are connected by bolts to realize quick disassembly and assembly. The cover plate 7, the driving motor 8 and the fan 9 can be taken out together to clean the dust attached to the fan 9. In addition, the bolt connection between the ear piece 10 and the cover plate 7 provides axial restraint force to avoid abnormal noise or sealing failure caused by loosening of the cover plate 7 during long-term operation. The ear piece 10 and the cover plate 7 are integrally cast, and the contact surface of the cover plate 7 and the placing groove 6 is uniformly pressed by the bolt pretightening force, with a sealing interface gap of ≤0.05mm, which can withstand the pressure fluctuation in the air duct 1 and solve the air leakage problem of the traditional buckle type cover plate.

[0026] Referring to Figures 1-4 , wherein the dust collecting cylinder 4 is threadedly connected to the inner side of the annular connecting piece 3;

[0027] Through the above structure, the thread connection is tightly engaged by the spiral surface (pitch ≤2mm), and the flat surface of the end face of the annular connecting piece 3 and the dust collecting cylinder 4 is pressed to form a double sealing interface, which effectively prevents the dust-containing airflow from escaping from the joint. During the dust cleaning operation, quick disassembly and assembly can be realized, saving time. It should be noted that the thread engagement length is ≥8mm (equivalent to 4-5 complete threads), which cooperates with the axial pretightening force generated by the self-weight of the dust collecting cylinder 4 to keep the connection stable under the working condition of vibration frequency ≤50Hz and acceleration ≤0.6g, avoiding accidental falling during operation.

[0028] Referring to Figures 1-4 , wherein the shape of the dust falling hole 5 is circular arc, the diameter difference between the inner circle and the outer circle of the circular arc is 2cm, and the position of the dust falling hole 5 is matched with the lower half of the air duct 1;

[0029] Through the above structure, the diameter difference between the inner and outer circles of the circular arc dust falling hole 5 is 2cm, forming a gradually expanding conical surface, which forms a continuous curvature with the conical angle of the lower half of the air duct 1. This structure makes the dust particles slide into the dust collecting cylinder 4 along the tangent direction, reduces the probability of collision with the hole wall, reduces the airflow resistance, and makes the dust fall more smoothly.

[0030] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and implementations, it is to be understood that the terminology used is for the purpose of descriptive clarity and that it is intended to be limited only by the words recited in the appended claims. The scope of the present application shall be limited only by the claims.

[0031] While the embodiments of the present application have been shown and described with respect to particular embodiments thereof, it will be understood by those skilled in the art that various changes in form and details can be made therein without departing from the spirit and scope of the application. Therefore, the scope of the application should not be limited by the embodiments, but should be defined only in accordance with the following claims and their equivalents.

Claims

1. A dust removal device for flue gas in a tunnel kiln, characterized in that, Includes an air duct (1), with an air inlet at the left end and an air outlet at the right end. A base plate (2) is fixedly connected to the bottom end of the air duct (1), and an annular connecting piece (3) is fixedly connected to the bottom end of the base plate (2). A dust collection cylinder (4) is provided on the inner side of the annular connecting piece (3), and a dust collection hole (5) is opened on the annular connecting piece (3). A placement groove (6) is opened at the top end of the air duct (1), and a cover plate (7) is placed on the inner side of the placement groove (6). A drive motor (8) is fixedly connected to the top end of the cover plate (7). The output end of the drive motor (8) passes through and extends to the inner side of the air duct (1). A fan (9) is fixedly connected to the outer side of the output end of the drive motor (8). An ear piece (10) is fixedly connected to the top end of the cover plate (7), and the ear piece (10) is fixedly connected to the air duct (1) by bolts. The air duct (1) includes an upper half and a lower half. The upper half of the air duct (1) has a rectangular cross section, and the lower half of the air duct (1) has a frustum shape that is wider at the top and narrower at the bottom. The upper half and the lower half of the air duct (1) are separated by a partition. The partition has a through hole for connecting the upper half and the lower half of the air duct (1). The fan (9) is located in the upper half of the air duct (1).

2. The tunnel kiln flue gas dust removal device according to claim 1, characterized in that: The dust collection cylinder (4) is threaded to the inside of the annular connecting piece (3).

3. The tunnel kiln flue gas dust removal device according to claim 1, characterized in that: The dust collection hole (5) is arc-shaped, with a diameter difference of 2cm between the inner and outer circles. The position of the dust collection hole (5) is adapted to the lower half of the air duct (1).

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