Filtering device for low-nitrogen combustor

Abstract

The utility model discloses a filtering device for a low-nitrogen combustor, and relates to the field of low-nitrogen combustors, the filtering device comprises a combustor body, a filtering assembly and an adjusting assembly, gas enters a gas inlet cylinder, through a plurality of adhesion plates which are obliquely arranged in a staggered mode, smoke is guided to sequentially pass through the adhesion plates, and through the curved surfaces of the outer surfaces of the adhesion plates, the smoke is guided to pass through the adjusting assembly; the flue gas is guided by the adhesion plate on the upper layer and hit on the surface of the adhesion plate on the lower layer, so that large-particle substances in the flue gas are adsorbed on the adhesion plate, the large-particle substances are filtered, the blockage problem is avoided, and the device is convenient to use and high in practicability. The hexagonal nut at one end of the two-way threaded rod is rotated by using other tools, so that the two-way threaded rod is driven to rotate, the two control blocks oppositely move in the connecting cylinder, then the gap of the space in the connecting cylinder is controlled, the gas flow rate is adjusted, and the gas inlet amount is conveniently controlled.

Description

A filter device for a low-NOx burner Technical Field

[0001] This utility model relates to the field of low-NOx burner technology, and in particular to a filter device for a low-NOx burner. Background Technology

[0002] A low-NOx burner is a combustion device designed to reduce nitrogen oxide emissions. Nitrogen oxides are a class of harmful gases, mainly generated by the reaction of nitrogen and oxygen at high temperatures during combustion. They have a negative impact on the environment and human health. Low-NOx burners effectively reduce the generation of nitrogen oxides by optimizing the combustion process, lowering the combustion temperature, controlling the oxygen supply, and using other technical means.

[0003] When using a low-NOx burner, the amount of air entering the burner is controlled to reduce the generation of nitrogen oxides. After a certain period of combustion, some of the flue gas needs to be reintroduced into the combustion chamber to reduce the oxygen concentration and temperature in the combustion zone. During this flue gas recirculation process, a filtration device is required to filter the flue gas that is about to return to the burner.

[0004] Existing low-NOx burners typically use filters to circulate flue gas, primarily to remove large particles and prevent secondary combustion from causing blockages. However, using filters to remove large particles can lead to blockages after use, resulting in increased gas pressure. Filters designed for these large particles are inconvenient to use. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] To address the problems existing in the prior art, this utility model provides a filter device for low-NOx burners.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: a filter device for a low-NOx burner, comprising a burner body, a filter assembly disposed on the outer surface of the burner body, and an adjustment assembly disposed on the top of the filter assembly;

[0009] The filter assembly includes an air inlet cylinder fixedly installed on the upper surface of the burner body. A fixing ring is provided at the top of the air inlet cylinder, and several connecting rings are provided below the fixing ring. The upper surface of the top connecting ring is fixedly connected to the lower surface of the fixing ring. A connecting rod is fixedly connected between adjacent connecting rings, and an adhesive plate is fixedly connected to the inner side of the connecting ring.

[0010] The adjustment assembly includes a connecting cylinder disposed at the top of the air intake cylinder, a fixed box fixedly connected to the outer surface of the connecting cylinder, a bidirectional threaded rod movably connected inside the fixed box, and two control blocks meshing with the outer surface of the bidirectional threaded rod.

[0011] In a preferred embodiment of the filter device for a low-NOx burner described in this utility model, a plug ring is fixedly connected to the lower surface of the fixing ring, and a slot that mates with the plug ring is provided on the top of the air inlet cylinder.

[0012] In a preferred embodiment of the filter device for a low-NOx burner described in this utility model, an insert block is inserted into the outer surface of the air inlet cylinder, a pull block is fixedly connected to the end of the insert block away from the air inlet cylinder, a tension spring is fixedly connected between the pull block and the air inlet cylinder, and the air inlet cylinder and the insert ring are both provided with insertion holes that cooperate with the insert block.

[0013] In a preferred embodiment of the filter device for a low-NOx burner described in this utility model, the outer surface of the adhesive plate is provided with a curved surface, the adhesive plate is inclined, and the adhesive plates are arranged alternately from top to bottom.

[0014] In a preferred embodiment of the filter device for a low-NOx burner described in this utility model, an external threaded cylinder is fixedly connected to the top of the fixing ring, and an internal thread that mates with the external threaded cylinder is provided on the bottom of the inner side of the connecting cylinder.

[0015] As a preferred embodiment of the filter device for a low-NOx burner described in this utility model, the control block has a threaded hole inside that mates with a bidirectional lead screw. One end of the threaded hole near another control block is connected to an insertion hole. Compression springs are fixedly connected to the inner walls of the insertion holes inside the two control blocks. A sleeve is fixedly connected between the two compression springs. The bidirectional threaded rod passes through the inside of the sleeve, and one end of the bidirectional threaded rod passes through the outer surface of the fixed box and is fixedly connected to a hexagonal nut.

[0016] (III) Beneficial Effects

[0017] This invention provides a filter device for a low-NOx burner. It has the following advantages:

[0018] 1. Gas enters the interior of the air inlet cylinder and is guided by several staggered and obliquely arranged adhesive plates. The gas passes through these plates sequentially, and the curved surface of the adhesive plates increases the surface area. The gas is guided by the upper adhesive plates and impacts the surface of the lower adhesive plates, causing large particles in the gas to be adsorbed onto the plates. This effectively filters large particles without causing blockages and makes the gas easy to use.

[0019] 2. Use other tools to rotate the hexagonal nut at one end of the double-threaded rod, thereby driving the double-threaded rod to rotate, causing the two control blocks to move towards each other inside the connecting cylinder, thereby controlling the gap in the space inside the connecting cylinder, thus realizing the adjustment of gas flow rate and facilitating the control of gas intake. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 is a schematic diagram of the overall structure of this utility model.

[0022] Figure 2 is an exploded view of the filter assembly of this utility model.

[0023] Figure 3 is a schematic diagram of the structure of the adhesive plate of this utility model.

[0024] Figure 4 is an exploded structural diagram of the pull block of this utility model.

[0025] Figure 5 is an exploded structural diagram of the adjustment component of this utility model.

[0026] Figure 6 is a schematic diagram of the internal structure of the control block of this utility model.

[0027] In the diagram, 1. Burner body; 2. Filter assembly; 201. Inlet cylinder; 202. Fixing ring; 203. Insert ring; 204. Connecting ring; 205. Connecting rod; 206. External threaded cylinder; 207. Adhesive plate; 208. Tension spring; 209. Insert block; 210. Pull block; 3. Adjustment assembly; 301. Connecting cylinder; 302. Fixing box; 303. Control block; 304. Bidirectional threaded rod; 305. Compression spring; 306. Sleeve. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0029] Example 1

[0030] Referring to Figures 1, 2, 3 and 4, the first embodiment of the present invention is provided. This embodiment provides a filter device for a low-NOx burner, including a burner body 1, a filter assembly 2 disposed on the outer surface of the burner body 1, and an adjustment assembly 3 disposed on the top of the filter assembly 2.

[0031] The filter assembly 2 includes an air inlet 201 fixedly installed on the upper surface of the burner body 1. A fixing ring 202 is provided at the top of the air inlet 201, and several connecting rings 204 are provided below the fixing ring 202. The upper surface of the connecting ring 204 at the top is fixedly connected to the lower surface of the fixing ring 202. A connecting rod 205 is fixedly connected between adjacent connecting rings 204, and an adhesive plate 207 is fixedly connected to the inner side of the connecting ring 204.

[0032] Specifically, a retaining ring 203 is fixedly connected to the lower surface of the retaining ring 202, and a slot that mates with the retaining ring 203 is provided on the top of the air inlet cylinder 201. By setting the retaining ring 203 and the slot, the retaining ring 202 is limited, thereby preventing the connecting ring 204 from causing the adhesive plate 207 to shake.

[0033] Specifically, an insert block 209 is inserted into the outer surface of the air intake cylinder 201. A pull block 210 is fixedly connected to the end of the insert block 209 away from the air intake cylinder 201. A tension spring 208 is fixedly connected between the pull block 210 and the air intake cylinder 201. The air intake cylinder 201 and the insert ring 203 are both provided with insertion holes that cooperate with the insert block 209. Through the arrangement of the insert block 209, the pull block 210 and the tension spring 208, the insert ring 203 is locked, thereby locking the fixing ring 202 and preventing the fixing ring 202 from falling off. Sealing rings are provided on the outer surface of the insert ring 203 above and below the insertion hole, and a sealing ring is also provided on the lower surface of the fixing ring 202, thereby preventing gas leakage.

[0034] Specifically, the outer surface of the adhesive plate 207 is provided with a curved surface. The adhesive plate 207 is inclined and staggered from top to bottom. The curved surface of the adhesive plate 207 is wavy. By setting the curved surface, the surface area of ​​the adhesive plate 207 is increased, thereby improving the adhesion effect. Furthermore, by tilting and staggering, the upper adhesive plate 207 can guide gas to the lower adhesive plate 207. The gas guided by the upper adhesive plate 207 is directed and impacted onto the surface of the lower adhesive plate 207, thereby achieving the filtration of large particulate matter.

[0035] Furthermore, the gas enters the interior of the air inlet 201 and is guided by several staggered and obliquely arranged adhesive plates 207. The gas passes through these adhesive plates 207 sequentially, and the curved surface of the outer surface of the adhesive plates 207 increases the surface area. This allows the gas to be guided by the upper adhesive plate 207 and impact the surface of the lower adhesive plate 207, thereby adsorbing large particles in the gas onto the adhesive plates 207 and filtering out large particles. Sealing rings are provided on the outer surface of the insertion ring 203 above and below the insertion hole.

[0036] Example 2

[0037] Referring to Figures 1, 5 and 6, this is the second embodiment of the present invention. This embodiment is based on the previous embodiment. The adjusting component 3 includes a connecting cylinder 301 disposed on the top of the air inlet cylinder 201. A fixing box 302 is fixedly connected to the outer surface of the connecting cylinder 301. A bidirectional threaded rod 304 is movably connected inside the fixing box 302. Two control blocks 303 are engagedly connected to the outer surface of the bidirectional threaded rod 304.

[0038] Specifically, the top of the retaining ring 202 is fixedly connected to the external threaded cylinder 206, and the bottom of the inner side of the connecting cylinder 301 is provided with an internal thread that mates with the external threaded cylinder 206. Through the setting of the external threaded cylinder 206 and the internal thread on the inner side of the connecting cylinder 301, the air inlet cylinder 201 and the connecting cylinder 301 are connected, and the bottom of the connecting cylinder 301 is provided with a sealing ring for sealing.

[0039] Specifically, the control block 303 has a threaded hole inside that mates with the bidirectional lead screw. One end of the threaded hole near another control block 303 is connected to an insertion hole. Compression springs 305 are fixedly connected to the inner walls of the insertion holes inside both control blocks 303. A sleeve 306 is fixedly connected between the two compression springs 305. The bidirectional threaded rod 304 passes through the inside of the sleeve 306. One end of the bidirectional threaded rod 304 passes through the outer surface of the fixing box 302 and is fixedly connected to a hexagonal nut. Through the arrangement of the compression springs 305 and the sleeve 306, the sleeve 306 can shield the part of the bidirectional threaded rod 304 that passes through the inside of the connecting pipe. Both ends of the sleeve 306 are connected and sealed to the insertion holes on the outer surface of the control block 303. There are gaps between the two sides of the control block 303 and the inner wall of the connecting pipe, thereby ensuring that the inside of the connecting pipe can maintain air intake, thus ensuring the safety of the oxygen concentration inside the burner.

[0040] Furthermore, by using other tools to rotate the hexagonal nut at one end of the bidirectional threaded rod 304, the bidirectional threaded rod 304 is rotated, causing the two control blocks 303 to move towards each other inside the connecting cylinder 301, thereby controlling the gap in the space inside the connecting cylinder 301 and thus adjusting the gas flow rate.

[0041] Working principle: When filtering the circulating flue gas of the low-NOx burner, the fixing ring 202, through the connecting block and connecting rod 205, drives the adhesive plate 207 to be inserted into the inside of the air inlet cylinder 201. When the fixing ring 202 is inserted, the insert block 209 needs to be pulled out by the pull block 210, so that the insert block 209 is disengaged from the slot. Then, the insert ring 203 is inserted into the slot at the top of the air inlet pipe. The insert block 209 is released, and under the reset action of the tension spring 208, the insert block 209 is inserted into the insertion hole, thereby locking the air inlet pipe and the insert ring 203. Then, through the cooperation of the connecting cylinder 301 and the external threaded cylinder 206, the connecting cylinder 301 is installed on the top of the air inlet cylinder 201. The top of the connecting cylinder 301 is connected to the circulating flue gas pipe. After assembly, the bidirectional threaded rod 30 is rotated using other tools. The hexagonal nut at one end of the 4-axis drives the bidirectional threaded rod 304 to rotate, causing the two control blocks 303 to move towards each other inside the connecting cylinder 301. This controls the gap in the space inside the connecting cylinder 301, thereby regulating the gas flow rate. The gas passing through the connecting cylinder 301 enters the interior of the air inlet cylinder 201. Through several staggered and obliquely arranged adhesive plates 207, the flue gas is guided to pass through several adhesive plates 207 in sequence. The curved surface of the outer surface of the adhesive plates 207 increases the surface area, allowing the flue gas to be guided by the upper adhesive plate 207 and impact the surface of the lower adhesive plate 207. This causes large particles in the flue gas to be adsorbed onto the adhesive plates 207, thereby filtering large particles and ultimately completing the filtration of the circulating flue gas of the low-NOx burner.

[0042] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

Claims

1. A filter device for a low-NOx burner, comprising a burner body (1), characterized in that: A filter assembly (2) is provided on the outer surface of the burner body (1), and an adjustment assembly (3) is provided on the top of the filter assembly (2). The filter assembly (2) includes an air inlet cylinder (201) fixedly installed on the upper surface of the burner body (1). A fixing ring (202) is provided on the top of the air inlet cylinder (201), and several connecting rings (204) are provided below the fixing ring (202). The upper surface of the connecting ring (204) located at the top is fixedly connected to the lower surface of the fixing ring (202). A connecting rod (205) is fixedly connected between the connecting rings (204), and an adhesive plate (207) is fixedly connected to the inner side of the connecting rings (204); the adjusting assembly (3) includes a connecting cylinder (301) disposed on the top of the air inlet cylinder (201), a fixing box (302) is fixedly connected to the outer surface of the connecting cylinder (301), a bidirectional threaded rod (304) is movably connected inside the fixing box (302), and two control blocks (303) are engaged with the outer surface of the bidirectional threaded rod (304).

2. The filter device for a low-NOx burner according to claim 1, characterized in that: The lower surface of the fixed ring (202) is fixedly connected to the insert ring (203), and the top of the air inlet cylinder (201) is provided with a slot that cooperates with the insert ring (203).

3. A filter device for a low-NOx burner according to claim 2, characterized in that: An insert block (209) is inserted into the outer surface of the air intake cylinder (201). A pull block (210) is fixedly connected to one end of the insert block (209) away from the air intake cylinder (201). A tension spring (208) is fixedly connected between the pull block (210) and the air intake cylinder (201). The air intake cylinder (201) and the insert ring (203) are both provided with insertion holes that cooperate with the insert block (209).

4. A filter device for a low-NOx burner according to claim 3, characterized in that: The outer surface of the adhesive plate (207) is provided with a curved surface, the adhesive plate (207) is inclined, and the adhesive plates (207) are arranged alternately from top to bottom.

5. A filter device for a low-NOx burner according to claim 4, characterized in that: The top of the fixing ring (202) is fixedly connected to an external threaded cylinder (206), and the bottom of the inner side of the connecting cylinder (301) is provided with an internal thread that cooperates with the external threaded cylinder (206).

6. A filter device for a low-NOx burner according to claim 5, characterized in that: The control block (303) has a threaded hole inside that mates with the bidirectional lead screw. One end of the threaded hole near the other control block (303) is connected to an insertion hole. The inner walls of the insertion holes inside the two control blocks (303) are fixedly connected with compression springs (305). A sleeve (306) is fixedly connected between the two compression springs (305). The bidirectional threaded rod (304) passes through the inside of the sleeve (306). One end of the bidirectional threaded rod (304) passes through the outer surface of the fixed box (302) and is fixedly connected with a hexagonal nut.

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