A boiler exhaust gas device

Abstract

This invention discloses a boiler exhaust gas emission device, including an exhaust pipe connected to a boiler. The exhaust pipe expands outward from the middle to form a thickened section. An annular groove is provided on the inner surface of the exhaust pipe opposite the thickened section, and the outer ring of the annular groove extends into the thickened section. A fixing block and multiple sealing blocks are provided in the annular groove. A fixing ring is provided inside the exhaust pipe opposite the annular groove. The outer ring of the fixing ring abuts against the inner surfaces of the fixing block and the sealing blocks. An annular air cavity is formed between the fixing block, the sealing blocks, and the annular groove. One of the sealing blocks is pressed down to form an insertion cavity between itself and the sealing blocks on both sides. A scraper is inserted into the insertion cavity to seal it. This invention has a simple structure. The rotating scraper can scrape away dust adhering to the inner wall of the exhaust pipe in one go, greatly increasing efficiency, avoiding affecting the exhaust gas emission efficiency, and reducing corrosion of the exhaust pipe.

Description

Technical Field

[0001] This invention relates to the field of exhaust gas emission technology, and more specifically to a boiler exhaust gas emission device. Background Technology

[0002] A boiler is an energy conversion device. The energy input to a boiler includes the chemical energy of fuel and electrical energy. The boiler outputs steam, high-temperature water, or organic heat carriers with a certain amount of thermal energy.

[0003] Traditional boilers typically discharge exhaust gas through exhaust pipes and intermediate treatment equipment before releasing it into the atmosphere. However, current exhaust pipes lack dust removal structures. After prolonged exhaust, a large amount of dust and other impurities accumulate on the inner wall of the pipe, accelerating pipe damage and reducing its inner diameter, thus affecting exhaust efficiency. Furthermore, the internal filters and other structures of the exhaust pipe can obstruct dust removal, making it impossible to completely remove dust from the inside of a single exhaust pipe at once, thus impacting dust removal efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a boiler exhaust gas emission device in which the installed filter screen does not affect dust removal, so that the inner wall of a pipe can be completely cleaned in one go, greatly increasing efficiency.

[0005] This invention is achieved through the following technical solution: a boiler exhaust gas emission device, comprising an exhaust pipe connected to a boiler, wherein the middle of the exhaust pipe expands outward to form a thickened portion, and an annular groove is provided on the inner surface of the exhaust pipe opposite to the thickened portion, the outer ring of the annular groove extends into the thickened portion, a fixing block and multiple sealing blocks are provided in the annular groove, a fixing ring is provided inside the exhaust pipe opposite to the annular groove, the outer ring of the fixing ring abuts against the inner surface of the fixing block and the sealing block, an annular air cavity is formed between the fixing block, the sealing block and the annular groove, one of the sealing blocks is pressed down to form an insertion cavity between the sealing blocks on both sides, a scraper is inserted into the insertion cavity to seal the insertion cavity, one side of the scraper protrudes to form an extension, and a drive mechanism for rotating the scraper is installed on the outside of the exhaust pipe.

[0006] As a preferred technical solution, the fixing block and multiple sealing blocks are arranged in a ring structure, with the fixing block and sealing blocks abutting each other. The inner surfaces of both the fixing block and the sealing blocks are arc-shaped, and the degree of arc matches the degree of arc of the ring body. Sealing rings are installed on the outside of the multiple sealing blocks. The sealing rings protrude at the gaps between the sealing blocks to form sealing parts. The sealing parts are inserted into the gaps between the sealing blocks and are adhered and fixed to the sealing blocks. The inner side of the fixing block is installed on the outer ring surface of the ring body. The outer side of the fixing block extends through the sealing ring into the annular groove and narrows inward to form a connecting part. The outer side of the connecting part is installed on the inner wall of the annular groove, and a ventilation channel is formed between the connecting part and the annular groove.

[0007] As a preferred technical solution, an air injection pipe communicating with the annular groove is installed on the outer ring surface of the thickened part, and an air valve is installed on the air injection pipe.

[0008] As a preferred technical solution, the outer ring surface of the sealing ring is provided with through holes facing the sealing block, and each through hole is provided with a compression spring. One end of the compression spring is installed on the outer surface of the sealing block, and the other end is installed on the inner wall surface of the annular groove.

[0009] As a preferred technical solution, the thickness of the sealing block and the fixing block matches the width of the annular groove, and the thickness of the sealing ring also matches the width of the annular groove.

[0010] As a preferred technical solution, the drive mechanism includes a rubber wheel, a servo motor, and multiple positioning rings. The inner wall of the exhaust pipe is provided with multiple annular positioning grooves, and the positioning rings are movably installed in the positioning grooves. The inner ring surface of the positioning ring is fixedly connected to the outer ring surface of the positioning ring. The outer wall surface of the exhaust pipe is provided with a strip-shaped opening that communicates with the positioning groove at one of the positioning rings. A part of the rubber wheel passes through the strip-shaped opening and abuts against the outer ring surface of the positioning ring. The servo motor is installed on the outer wall surface of the exhaust pipe, and the shaft of the servo motor is installed in the center hole of the rubber wheel.

[0011] As a preferred technical solution, the extension section has two parts, which are respectively set on both sides of the ring body, and the scraper is located on both sides of the ring body to form scraping grooves.

[0012] As a preferred technical solution, a slag discharge port is provided axially on the bottom surface of the exhaust pipe, and a cover plate is fixed in the slag discharge port by screws to seal it.

[0013] As a preferred technical solution, the cross-section of the scraper and the extension is set in an arc shape, and the degree of arc is matched with the degree of arc of the inner wall of the exhaust pipe.

[0014] The beneficial effects of this invention are: the invention has a simple structure. After the gas in the annular gas chamber is released, the rebound energy of the compression spring pulls the sealing block, causing the sealing block to retract completely into the annular groove. An annular channel is formed between the ring body and the exhaust pipe, allowing the scraper to rotate smoothly along the annular channel without obstruction. The rotating scraper can scrape off the dust adhering to the inner wall of the exhaust pipe in one go, greatly increasing efficiency, avoiding affecting the emission efficiency of exhaust gas, and reducing corrosion of the exhaust pipe. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the scraper structure in this invention;

[0018] Figure 3 This is a cross-sectional view of the thickened portion of the exhaust pipe in this invention;

[0019] Figure 4 This is a schematic diagram of the structure of the fixing block in this invention.

[0020] The components are as follows: 1. Exhaust pipe; 2. Thickened part; 3. Annular groove; 4. Sealing block; 5. Ring body; 6. Filter screen; 7. Scraper; 8. Positioning ring; 9. Rubber wheel; 11. Servo motor; 12. Extension part; 13. Scraper groove; 14. Compression spring; 15. Sealing ring; 16. Fixing block; 17. Air valve; 18. Air pipe; 19. Connecting part. Detailed Implementation

[0021] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0022] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0023] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0024] like Figure 1 , Figure 2 , Figure 3 , Figure 4As shown, a boiler exhaust gas emission device of the present invention includes an exhaust pipe 1 connected to a boiler. The middle of the exhaust pipe 1 expands outward to form a thickened part 2. An annular groove 3 is provided on the inner surface of the exhaust pipe 1 opposite to the thickened part 2. The outer ring of the annular groove 3 extends into the thickened part 2. A fixing block 16 and multiple sealing blocks 4 are provided in the annular groove 3. A fixing ring is provided inside the exhaust pipe 1 opposite to the annular groove 3. The outer ring of the fixing ring abuts against the inner surface of the fixing block 16 and the sealing block 4. An annular air cavity is formed between the fixing block 16, the sealing block 4 and the annular groove 3. One of the sealing blocks 4 is pressed down to form an insertion cavity between itself and the sealing blocks 4 on both sides. A scraper 7 is inserted into the insertion cavity to seal the insertion cavity. One side of the scraper 7 protrudes to form an extension part 12. A drive mechanism for rotating the scraper 7 is installed on the outside of the exhaust pipe 1.

[0025] In this embodiment, the fixing block 16 and multiple sealing blocks 4 are arranged in a ring structure. The fixing block 16 and the sealing blocks 4 are abutted against each other. The inner surfaces of the fixing block 16 and the sealing blocks 4 are both arc-shaped, and the degree of arc matches the degree of arc of the ring body 5. Sealing rings 15 are installed on the outside of the multiple sealing blocks 4. The sealing rings 15 protrude from the gaps between the sealing blocks 4 to form sealing parts. The sealing parts are inserted into the gaps between the sealing blocks 4 and are adhered and fixed to the sealing blocks 4. The inner side of the fixing block 16 is installed on the outer ring surface of the ring body 5. The outer side of the fixing block 16 extends through the sealing ring 15 into the annular groove 3 and narrows inward to form a connecting part 19. The outer side of the connecting part 19 is installed on the inner wall surface of the annular groove 3. A ventilation channel is formed between the connecting part 19 and the annular groove 3, so that the gas injected into the annular air cavity can fill the annular groove along the ventilation channel and squeeze all the protrusions of the sealing blocks.

[0026] In this embodiment, an air injection pipe 18 communicating with the annular groove 3 is installed on the outer ring surface of the thickened part 2, and an air valve 17 is installed on the air injection pipe 18.

[0027] In this embodiment, the outer ring surface of the sealing ring 15 is provided with through holes opposite to the sealing block 4, and each through hole is provided with a compression spring 14. One end of the compression spring 14 is installed on the outer side surface of the sealing block 4, and the other end is installed on the inner wall surface of the annular groove 3.

[0028] In this embodiment, the thickness of the sealing block 4 and the fixing block 16 matches the width of the annular groove 3, and the thickness of the sealing ring 15 also matches the width of the annular groove 3, so that the fixing block and multiple sealing blocks can seal the annular groove, thereby increasing the sealing performance.

[0029] In this embodiment, the driving mechanism includes a rubber wheel 9, a servo motor 11, and multiple positioning rings 8. The inner wall of the exhaust pipe 1 is provided with multiple annular positioning grooves. The positioning rings 8 are all movably installed in the positioning grooves. The inner ring surface of the positioning ring 8 is fixedly connected to the outer ring surface of the positioning ring 8. The outer wall surface of the exhaust pipe 1 is provided with a strip-shaped opening that communicates with the positioning groove at one of the positioning rings 8. A part of the rubber wheel 9 passes through the strip-shaped opening and abuts against the outer ring surface of the positioning ring 8. The servo motor 11 is installed on the outer wall surface of the exhaust pipe 1, and the rotating shaft of the servo motor 11 is installed in the center hole of the rubber wheel 9.

[0030] The outer ring of the rubber wheel has anti-slip textures that abut against the outer ring of the positioning ring. The outer ring of the positioning ring is roughened to increase the friction between the rubber wheel and the positioning ring, thereby better driving the positioning ring and scraper to rotate.

[0031] In this embodiment, the extension 12 is provided in two parts and is respectively disposed on both sides of the ring body 5. The scraper 7 is located on both sides of the ring body 5 and forms scraping grooves 13. The scraping grooves reduce the material used of the scraper and reduce the cost.

[0032] In this embodiment, a slag discharge port is provided axially on the bottom surface of the exhaust pipe 1, and a cover plate that seals the slag discharge port is fixed in the slag discharge port by screws.

[0033] In this embodiment, the cross-section of the scraper 7 and the extension 12 is arranged in an arc shape, and the degree of its arc is matched with the degree of arc of the inner wall of the exhaust pipe 1, so that the scraper can make close contact with the inner wall of the exhaust pipe, and the dust adhering to the inner wall of the exhaust pipe can be quickly scraped off through friction with the inner wall of the exhaust pipe.

[0034] When in use, prepare an air pump, connect the air pump to the air injection pipe, and open the air valve. The gas generated by the air pump can be injected into the annular air chamber through the air injection pipe. The gas can squeeze the sealing block inward until the inner side of the sealing block contacts the outer ring surface of the ring body, so that the ring body, the fixed block and the sealing block are sealed to prevent air leakage.

[0035] During dust removal, the air valve is opened, allowing the gas inside the annular air chamber to be discharged through the air injection pipe. After the air pressure is lost, the rebound energy of the compression spring pulls the sealing block, causing the sealing block to enter the annular groove completely, thus forming an annular channel between the ring and the exhaust pipe.

[0036] After the above is completed, the servo motor can rotate forward and reverse. The start of the servo motor drives the rubber wheel, and the rotating rubber wheel can rub against the positioning ring. The friction can drive the positioning ring and scraper to rotate. The scraper, which rotates back and forth, can scrape off the dust adhering to the inner wall of the exhaust pipe, which greatly increases efficiency, avoids affecting the exhaust gas emission efficiency, and also reduces the corrosion of the exhaust pipe. The rotation of the scraper drives the extension part, which can move to the area in front of and behind the fixed block to ensure the comprehensiveness of dust removal in one go and avoid the area in front of and behind the fixed block not being cleaned. After cleaning, the dust will fall to the bottom of the exhaust pipe. Therefore, after opening the cover, the dust can fall out along the slag discharge port, which facilitates slag removal.

[0037] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A boiler exhaust gas emission device, characterized in that: The exhaust pipe (1) is connected to the boiler. The middle of the exhaust pipe (1) is expanded outward to form a thickened part (2). The inner ring surface of the exhaust pipe (1) is provided with an annular groove (3) facing the thickened part (2). The outer ring of the annular groove (3) extends into the thickened part (2). The annular groove (3) is provided with a fixing block (16) and multiple sealing blocks (4). The inside of the exhaust pipe (1) is provided with a fixing ring facing the annular groove (3). The outer ring surface of the fixing ring abuts against the inner side of the fixing block (16) and the sealing block (4). An annular air cavity is formed between the fixing block (16), the sealing block (4) and the annular groove (3). One of the sealing blocks (4) is pressed down to form an insertion cavity between the sealing blocks (4) on both sides. A scraper (7) is inserted into the insertion cavity to seal the insertion cavity. One side of the scraper (7) protrudes to form an extension (12). A drive mechanism that drives the scraper (7) to rotate is installed on the outside of the exhaust pipe (1). The fixing block (16) and multiple sealing blocks (4) are arranged in a ring structure. The fixing block (16) and the sealing block (4) are set in abutment. The inner surfaces of the fixing block (16) and the sealing block (4) are both set in an arc structure, and the degree of arc is matched with the degree of arc of the ring body (5). The sealing ring (15) is installed on the outside of the multiple sealing blocks (4). The sealing ring (15) protrudes from the gap between the sealing blocks (4) to form a sealing part. The sealing part is inserted into the gap between the sealing blocks (4) and is bonded and fixed to the sealing block (4). The inner side of the fixing block (16) is installed on the outer ring surface of the ring body (5). The outer side of the fixing block (16) extends through the sealing ring (15) into the annular groove (3) and narrows inward to form a connecting part (19). The outer side of the connecting part (19) is installed on the inner wall surface of the annular groove (3). A ventilation channel is formed between the connecting part (19) and the annular groove (3).

2. The boiler exhaust gas emission device according to claim 1, characterized in that: An air injection pipe (18) communicating with the annular groove (3) is installed on the outer ring surface of the thickened part (2), and an air valve (17) is installed on the air injection pipe (18).

3. The boiler exhaust gas emission device according to claim 1, characterized in that: The outer ring of the sealing ring (15) is provided with through holes facing the sealing block (4), and each through hole is provided with a compression spring (14). One end of the compression spring (14) is installed on the outer side of the sealing block (4), and the other end is installed on the inner wall of the annular groove (3).

4. The boiler exhaust gas emission device according to claim 1, characterized in that: The thickness of the sealing block (4) and the fixing block (16) matches the width of the annular groove (3), and the thickness of the sealing ring (15) also matches the width of the annular groove (3).

5. The boiler exhaust gas emission device according to claim 1, characterized in that: The drive mechanism includes a rubber wheel (9), a servo motor (11), and multiple positioning rings (8). Multiple annular positioning grooves are provided on the inner wall of the exhaust pipe (1). The positioning rings (8) are movably installed in the positioning grooves. The inner ring surface of the positioning ring (8) is fixedly connected to the outer ring surface of the positioning ring (8). The outer wall surface of the exhaust pipe (1) is provided with a strip-shaped opening that communicates with the positioning groove at one of the positioning rings (8). A part of the rubber wheel (9) passes through the strip-shaped opening and abuts against the outer ring surface of the positioning ring (8). The servo motor (11) is installed on the outer wall surface of the exhaust pipe (1), and the shaft of the servo motor (11) is installed in the center hole of the rubber wheel (9).

6. The boiler exhaust gas emission device according to claim 1, characterized in that: The extension (12) has two parts, which are respectively located on both sides of the ring (5), and the scraper (7) is located on both sides of the ring (5) to form scraping grooves (13).

7. The boiler exhaust gas emission device according to claim 1, characterized in that: The bottom surface of the exhaust pipe (1) is provided with a slag discharge port in the axial direction, and a cover plate is fixed in the slag discharge port by screws to seal it.

8. The boiler exhaust gas emission device according to claim 1, characterized in that: The cross-sections of the scraper (7) and the extension (12) are arranged in an arc shape, and the degree of arc is matched with the degree of arc of the inner wall of the exhaust pipe (1).

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