Air inlet dustproof device of air pre-heater and using method of air inlet dustproof device

Abstract

The invention relates to the technical field of air pre-heater air inlet dust prevention, in particular to an air pre-heater air inlet dust prevention device and a using method thereof, and the air pre-heater air inlet dust prevention device comprises an air pre-heater and a dust prevention assembly. The dustproof assembly comprises a smoke pipe, a dustproof piece and a self-cleaning piece. The filter screen and the scraper are arranged in the smoke pipe, so that dust is effectively intercepted and automatically cleaned, the blocking risk of the air inlet of the air pre-heater is remarkably reduced, and the smoke circulation efficiency is improved; due to the design of the spiral blade, the smoke can drive the rotating shaft to rotate in the flowing process, then the filter screen is automatically cleaned, and the manual maintenance requirement is reduced; the intermittent knocking function of the vibration hammer effectively prevents dust accumulation of the spiral blade, and the transmission effect and long-term stability of the blade are guaranteed; the whole structure is simple, installation is convenient, operation is reliable, the operation cost and the failure rate of the air pre-heater are greatly reduced, the adaptability of the air pre-heater in the severe environment is improved, and the service life of the air pre-heater in the severe environment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of air preheater air intake dust prevention, in particular to an air preheater air intake dust prevention device and a use method thereof. Background Art

[0002] With the development of industrial production, air preheaters are increasingly used in energy, chemical, metallurgy and other industries. However, during the operation of the air preheater, due to the large amount of dust in the flue gas, it is easy to cause the air inlet to be blocked and the equipment to be worn, thus affecting the normal operation and heat exchange efficiency of the air preheater.

[0003] At present, although there are some solutions to the problem of dust prevention for air preheater intake, such as setting up conventional filters and cleaning devices, these methods generally have certain limitations. Conventional filters are prone to self-clogging when intercepting dust, resulting in increased resistance to flue gas flow, which in turn affects the working efficiency of the air preheater. In addition, existing cleaning devices often need to be shut down regularly for manual cleaning, which not only increases maintenance costs, but may also affect production due to untimely cleaning. Summary of the invention

[0004] In view of the above problems existing in the prior art, the present invention is proposed.

[0005] Therefore, the first purpose of the present invention is to propose an air preheater air inlet dust prevention device to solve the dust prevention problem of the air preheater air inlet, improve the equipment operation efficiency and reduce the maintenance cost.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: an air preheater intake dust prevention device, which includes an air preheater; a dust prevention component, including a smoke pipe, a dust prevention part, and a self-cleaning part, one end of the smoke pipe is connected to the air preheater, and the dust prevention part and the self-cleaning part are both arranged in the smoke pipe.

[0007] As a preferred solution of the air preheater air inlet dust prevention device of the present invention, the side wall of the smoke pipe is provided with a hole.

[0008] As a preferred solution of the air preheater air intake dust prevention device described in the present invention, the dust prevention component includes a filter and a dust collecting box, the dust collecting box is arranged outside the smoke pipe, below the hole; the filter is arranged inside the smoke pipe, above the dust collecting box.

[0009] As a preferred solution of the air preheater air intake dust prevention device described in the present invention, the self-cleaning part includes a rotating shaft, a base, and a scraper. The base is arranged in the smoke pipe, the rotating shaft is rotatably matched with the base, and the scraper is connected to the rotating shaft.

[0010] As a preferred solution of the air preheater air intake dust prevention device of the present invention, wherein: the rotating shaft is provided with spiral blades; and one end of the rotating shaft is provided with an opening.

[0011] As a preferred solution of the air preheater air inlet dust prevention device described in the present invention, the base is provided with a support rod and a ring platform, the support rod connects the smoke pipe and the side wall of the base, and the ring platform is arranged on the side wall of the base; the inner wall of the opening of the rotating shaft is rotatably matched with the outer wall of the base, and the outer wall of the opening is rotatably matched with the ring platform.

[0012] As a preferred solution of the air preheater air intake dust prevention device of the present invention, the scraper is provided with a connecting rod, the connecting rod passes through the base and is fixedly connected to the bottom of the opening.

[0013] As a preferred solution of the air preheater air intake dust prevention device described in the present invention, the self-cleaning part also includes a vibrator, which is slidably matched with the base; the vibrator is provided with a spring and a protrusion, the spring is arranged between the vibrator and the end face of the base, and the protrusion is arranged on the side wall of the vibrator.

[0014] As a preferred solution of the air preheater air intake dust prevention device of the present invention, the inner wall of the rotating shaft opening is also provided with a spiral protrusion, and the spiral protrusion cooperates with the convex block.

[0015] The second purpose of the present invention is to propose a method for using an air preheater air intake dust prevention device, which includes an air preheater air intake dust prevention device, and also includes the following steps: connecting one end of the smoke pipe to the air inlet of the air preheater; passing high-temperature flue gas, and filtering the ash particles and foreign matter carried by the flue gas when passing through the filter and entering the dust collecting box; the flue gas drives the rotating shaft to rotate through the spiral blades, so that the scraper cleans the filter and the vibrator cleans the rotating shaft.

[0016] The beneficial effects of the present invention are as follows: this scheme realizes effective interception and automatic cleaning of dust by arranging a filter and a scraper in the smoke duct, significantly reduces the risk of blockage of the air inlet of the air preheater, and improves the flue gas circulation efficiency; the design of the spiral blades enables the shaft to rotate during the flow of flue gas, thereby automatically cleaning the filter and reducing the need for manual maintenance; the intermittent knocking function of the vibrator effectively prevents dust accumulation on the spiral blades, ensuring the transmission effect and long-term stability of the blades; the overall structure is simple, easy to install, and reliable in operation, which greatly reduces the operating cost and failure rate of the air preheater and improves the adaptability and service life of the air preheater in harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0018] Figure 1 This is a scene diagram of the air preheater intake dust prevention device.

[0019] Figure 2 It is a cross-sectional view of the air preheater air intake dust prevention device.

[0020] Figure 3 This is the structural diagram of the dust prevention parts of the air preheater intake dust prevention device.

[0021] Figure 4 This is a cross-sectional view of the self-cleaning parts of the air preheater air intake dust prevention device.

[0022] Figure 5 This is a cross-sectional view from another angle of the self-cleaning part of the air preheater intake dust prevention device. DETAILED DESCRIPTION

[0023] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0024] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0025] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an embodiment that is mutually exclusive with other embodiments, either individually or selectively.

[0026] Example 1

[0027] Reference Figure 1 and Figure 2 , which is the first embodiment of the present invention, and provides an air preheater air intake dust prevention device, the air preheater air intake dust prevention device comprises an air preheater 100 and a dust prevention assembly 200,

[0028] Specifically, the dustproof assembly 200 includes a smoke pipe 201, a dustproof member 202, and a self-cleaning member 203. One end of the smoke pipe 201 is connected to the air preheater 100, and the dustproof member 202 and the self-cleaning member 203 are both arranged in the smoke pipe 201.

[0029] The smoke pipe 201 connects the air inlet end with the air preheater 100 . The dustproof part 202 filters the ash particles and foreign matters carried in the smoke when the smoke enters. The self-cleaning part 203 performs self-cleaning on the dustproof part 202 .

[0030] Example 2

[0031] Reference Figure 2 to Figure 5 , which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0032] Specifically, the side wall of the smoke pipe 201 is provided with a hole 201a, which is used to transfer the impurities remaining in the smoke pipe;

[0033] Specifically, the dustproof member 202 includes a filter 202a and a dust box 202b. The dust box 202b is arranged outside the smoke pipe 201 and below the hole 201a. The filter 202a is arranged inside the smoke pipe 201 and above the dust box 202b.

[0034] The filter screen 202a is detachably connected to the smoke pipe 201, and the dust collecting box 202b collects impurities intercepted by the filter screen 202a.

[0035] A baffle is also provided in the dust box 202b, which is L-shaped. After impurities fall into the dust box 202b, the baffle can prevent the impurities from re-entering the flue under the flow of flue gas. In addition, although the baffle is fixedly connected to the side wall of the dust box 202b, since the baffle is relatively thin, it can rotate within a certain range around the fixed point. When impurities fall onto the baffle, the baffle will vibrate and shake the impurities into the box.

[0036] Specifically, the self-cleaning member 203 includes a rotating shaft 203a, a base 203b, and a scraper 203c. The base 203b is disposed in the smoke pipe 201. The rotating shaft 203a and the base 203b are rotatably matched. The scraper 203c is connected to the rotating shaft 203a. An opening 203e is disposed at one end of the rotating shaft 203a.

[0037] The scraper 203c is fitted with the filter screen 202a, and the rotating shaft 203a rotates to drive the scraper 203c to remove impurities on the surface of the filter screen 202a. The base 203b is used to fix the rotating shaft.

[0038] It is worth noting that a wedge is provided at the lower end of the scraper 203c to facilitate cleaning of the filter 202a, and a brush may be provided on the contact surface between the scraper 203c and the filter 202a to improve the cleaning ability of the filter 202a.

[0039] Specifically, the base 203b is provided with a support rod 203f and a ring platform 203g, the support rod 203f connects the smoke tube 201 and the side wall of the base 203b, and the ring platform 203g is provided on the side wall of the base 203b; the inner wall of the opening 203e of the rotating shaft 203a is rotatably matched with the outer wall of the base 203b, and the outer wall of the opening 203e is rotatably matched with the ring platform 203g.

[0040] Specifically, the scraper 203c is provided with a connecting rod 203h, which penetrates the base 203b and is fixedly connected to the bottom of the opening 203e;

[0041] The connecting rod 203h is rotatably matched with the base 203b.

[0042] Specifically, the self-cleaning member 203 further includes a vibrating hammer 204, which is slidably matched with the base 203b; the vibrating hammer 204 is provided with a spring 204a and a protrusion 204b, the spring 204a is provided between the vibrating hammer 204 and the end surface of the base 203b, and the protrusion 204b is provided on the side wall of the vibrating hammer 204;

[0043] The vibrating hammer 204 is used to clean the impurities remaining on the rotating shaft 203a and the spiral blade 203d by vibrating, so as to avoid the increase of resistance and the influence on the rotation of the rotating shaft 203a;

[0044] It is worth noting that the side wall of the vibrating hammer 204 is also provided with a round platform, and the base 203b is provided with a corresponding slideway, and the slideway and the round platform are slidably matched (see Figure 4 ) thereby limiting the circumferential movement of the vibrating hammer 204, and the vibrating hammer 204 is provided with a channel capable of accommodating the connecting rod 203h.

[0045] Specifically, the inner wall of the opening 203e of the rotating shaft 203a is further provided with a spiral protrusion 203i, and the spiral protrusion 203i cooperates with the protrusion 204b.

[0046] Spring 204a is a pressure spring. When the rotating shaft 203a rotates, the protrusion 204b moves along the spiral path formed by the spiral protrusion 203i to the end of the spiral protrusion 203i, and then under the action of the spring 206, the vibrating hammer 204 pops out to the outside and hits the cross-section of the rotating shaft 203a, thereby shaking off the dust on the surface of the rotating shaft 203a. Then, when the rotating shaft 203a continues to rotate, the spiral protrusion 203i on the other side squeezes the protrusion 204b again, and a repeated vibration and cleaning process is performed.

[0047] Example 3

[0048] Reference Figure 1 to Figure 5 , which is the third embodiment of the present invention, and this embodiment provides a method for using an air preheater air intake dust prevention device, including an air preheater air intake dust prevention device, and also includes the following steps:.

[0049] Connect one end of the smoke pipe 201 to the air inlet of the air preheater 100;

[0050] High-temperature flue gas is introduced, and the ash particles and foreign matter carried by the flue gas are filtered out when the flue gas passes through the filter 202a and enters the dust collecting box 202b;

[0051] The smoke passes through the spiral blade 203d to drive the rotating shaft 203a to rotate, so that the scraper 203c cleans the filter screen 202a, and the vibrating hammer 204 cleans the rotating shaft 203a.

[0052] The dust dropped after the vibration hammer 204 vibrates the rotating shaft 203a will be drawn back into the filter screen 202a by the smoke, and then scraped into the dust box 202b by the scraper 203c, effectively avoiding the situation where foreign matter remains in the flue 201.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention 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 invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An air preheater air intake dust prevention device, characterized in that: include, Air preheater (100); A dustproof component (200) comprises a smoke pipe (201), a dustproof part (202), and a self-cleaning part (203); one end of the smoke pipe (201) is connected to the air preheater (100); and the dustproof part (202) and the self-cleaning part (203) are both arranged in the smoke pipe (201).

2. The air preheater air intake dust prevention device according to claim 1, characterized in that: The side wall of the smoke pipe (201) is provided with a hole (201a).

3. The air preheater air intake dust prevention device according to claim 2, characterized in that: The dust-proof part (202) comprises a filter (202a) and a dust box (202b); the dust box (202b) is arranged outside the smoke pipe (201) and below the hole (201a); the filter (202a) is arranged inside the smoke pipe (201) and above the dust box (202b).

4. The air preheater air intake dust prevention device according to claim 3, characterized in that: The self-cleaning member (203) comprises a rotating shaft (203a), a base (203b), and a scraper (203c); the base (203b) is arranged in the smoke pipe (201); the rotating shaft (203a) and the base (203b) are rotatably matched; and the scraper (203c) is connected to the rotating shaft (203a).

5. The air preheater air intake dust prevention device according to claim 4, characterized in that: The rotating shaft (203a) is provided with a spiral blade (203d); One end of the rotating shaft (203a) is provided with an opening (203e).

6. The air preheater air intake dust prevention device according to claim 5, characterized in that: The base (203b) is provided with a support rod (203f) and a ring platform (203g), the support rod (203f) connects the smoke pipe (201) and the side wall of the base (203b), and the ring platform (203g) is provided on the side wall of the base (203b); The inner wall of the opening (203e) of the rotating shaft (203a) is rotationally matched with the outer wall of the base (203b), and the outer wall of the opening (203e) is rotationally matched with the ring platform (203g).

7. The air preheater air intake dust prevention device according to claim 6, characterized in that: The scraper (203c) is provided with a connecting rod (203h), and the connecting rod (203h) passes through the base (203b) and is fixedly connected to the bottom of the opening (203e).

8. The air preheater air intake dust prevention device according to claim 7, characterized in that: The self-cleaning member (203) further comprises a vibrating hammer (204) which is slidably matched with the base (203b); The vibrating hammer (204) is provided with a spring (204a) and a convex block (204b); the spring (204a) is provided between the vibrating hammer (204) and an end surface of the base (203b); and the convex block (204b) is provided on a side wall of the vibrating hammer (204).

9. The air preheater air intake dust prevention device according to claim 8, characterized in that: The inner wall of the opening (203e) of the rotating shaft (203a) is also provided with a spiral protrusion (203i), and the spiral protrusion (203i) cooperates with the convex block (204b).

10. A method for using an air preheater air intake dust prevention device, characterized in that: The air preheater air intake dust prevention device according to claim 9 further comprises the following steps: Connecting one end of the smoke pipe (201) to the air inlet of the air preheater (100); High-temperature flue gas is introduced, and the ash particles and foreign matter carried by the flue gas are filtered out when the flue gas passes through the filter (202a) and enters the dust collecting box (202b); The smoke passes through the spiral blade (203d) to drive the rotating shaft (203a) to rotate, so that the scraper (203c) cleans the filter screen (202a) and the vibrating hammer (204) cleans the rotating shaft (203a).

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