Low-nitrogen burner with flue gas internal circulation function

Abstract

The utility model relates to the technical field of flue gas circulation of combustors, and discloses a low-nitrogen combustor with a flue gas internal circulation function, which is characterized in that one side of the top of a bottom plate is fixedly connected with a furnace body, the top of the furnace body is provided with a gas outlet, and the other side of the top of the bottom plate is fixedly connected with a first cylinder through a bracket; a smoke conveying pipe is fixedly connected to the end, close to the furnace body, of the first cylinder and fixedly connected to one side of the furnace body, a square rod is rotatably connected to the middle of the end, away from the furnace body, of the inner side of the first cylinder, a round rod is fixedly connected to the other end of the square rod, and blowing fan blades are fixedly connected to the other end of the round rod. The surface of the square rod is slidably sleeved with a sliding cylinder, a square hole matched with the square rod is formed in the middle of the sliding cylinder, and an annular inclined groove is formed in the circumferential surface of the sliding cylinder. According to the utility model, the technical effects that the flue gas is automatically mixed with air while being circulated, the re-combustion capability of the flue gas is improved, and the heat utilization rate is improved are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas circulation of burners, in particular to a low-nitrogen burner with a flue gas internal circulation function. Background Art

[0002] A low-nitrogen burner is a device that can effectively reduce the emission of nitrogen oxides during the combustion process. It controls the generation of nitrogen oxides during the combustion process through a series of technical means. After searching, the Chinese patent authorization number CN220981328U discloses a low-nitrogen burner with a flue gas internal circulation function. The top of the support frame is fixedly connected to a furnace body, one side of the support frame is fixedly connected to a fixed column, the fixed column is arranged on the outside of the support frame, and a plurality of support columns are arranged on the top of the fixed column. The ends of the plurality of support columns close to the fixed columns are respectively fixedly connected to fixed gaskets, the fixed gaskets are fixedly connected to the fixed columns, the support columns are fixedly connected to the fixed columns through the fixed gaskets, and the ends of the support columns away from the fixed gaskets are fixedly connected to the burners. The utility model drives the fan blades on the rotating shaft to rotate through a motor, so that the flue gas inside the furnace body is drawn into the circulation box through the smoke inlet pipe, and the smoke inside the circulation box is sent into the burner for combustion through the connecting pipe. The heat of combustion is sent into the furnace body through the smoke outlet pipe for circulation, thereby realizing the recycling of the flue gas, thereby reducing the pollution of the flue gas to the environment.

[0003] The low-nitrogen burner with flue gas internal circulation function in the above-mentioned patent has the following shortcomings: the equipment draws the flue gas inside the furnace body into the circulation box through the smoke inlet pipe, and sends the flue gas inside the circulation box into the burner for combustion through the connecting pipe. The heat of combustion is sent into the furnace body through the smoke outlet pipe for circulation, thereby realizing the recycling of the flue gas. However, when the flue gas burns in the burner, a large amount of heat will be lost in the burner, and the heat sent to the furnace body will be reduced too much, resulting in too low heat input efficiency. For this reason, a low-nitrogen burner with flue gas internal circulation function is designed. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a low-nitrogen burner with a flue gas internal circulation function.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A low-nitrogen burner with a flue gas internal circulation function, wherein one side of the top of the bottom plate is fixedly connected to a furnace body, an air outlet is arranged on the top of the furnace body, and the other side of the top of the bottom plate is fixedly connected to a first cylinder through a bracket, an end of the first cylinder close to the furnace body is fixedly connected to a smoke delivery pipe, and the smoke delivery pipe is fixedly connected to one side of the furnace body, a square rod is rotatably connected to the middle of one end of the inner side of the first cylinder away from the furnace body, the other end of the square rod is fixedly connected to a round rod, the other end of the round rod is fixedly connected to a blowing fan blade, a plurality of stirring rods are fixedly connected to the circumferential surface of the round rod, a sliding cylinder is provided on the surface of the square rod, and the sliding cylinder A square hole matching the square rod is provided in the middle of the column, and an annular bevel groove is provided on the circumferential surface of the sliding cylinder. A baffle rod is fixedly connected to the inside of the first cylinder, and the other end of the baffle rod is slidably connected in the annular bevel groove. A baffle plate is fixedly connected to the end of the sliding cylinder away from the furnace body, and a plurality of ventilation holes are provided on the baffle plate at equal distances. Sliding rods are slidably sleeved on both sides of the baffle plate, and the baffle plate is provided with circular holes matching the sliding rods. The ends of the two sliding rods close to the furnace body are fixedly connected to the same annular thin sheet, and the other ends of the two sliding rods are fixedly connected to protrusions, and the ends of the two sliding rods close to the protrusions are sleeved with springs.

[0007] As a further solution of the utility model, two air inlet holes are provided at one end of the first cylinder away from the furnace body, and square thin sheets are rotatably connected to the inner side of the first cylinder near the two air inlet holes.

[0008] As a further solution of the utility model, a connecting cover is fixedly connected to the middle of the top of the first cylinder, a second cylinder is fixedly connected to the top of the connecting cover, a smoking pipe is fixedly connected to one end of the second cylinder close to the furnace body, and the smoking pipe is fixedly connected to one side of the furnace body.

[0009] As a further solution of the utility model, a motor is fixedly connected to the middle of one end of the second cylinder away from the furnace body, the output end of the motor passes through the second cylinder and is fixedly connected to a rotating rod, and the other end of the rotating rod is fixedly connected to an exhaust fan blade, and a first transmission wheel is fixedly sleeved on the circumferential surface of the rotating rod.

[0010] As a further solution of the utility model, a second transmission wheel is fixedly sleeved on one end of the round rod close to the first transmission wheel, and a same belt is sleeved between the second transmission wheel and the first transmission wheel.

[0011] As a further solution of the utility model, a guide pipe is fixedly connected to the bottom of the other side of the furnace body, and a flamethrower is fixedly connected to the other end of the guide pipe.

[0012] The beneficial effects of the utility model are:

[0013] The utility model: due to the adoption of the first cylinder, the second cylinder, the motor, the rotating rod, the exhaust fan blades, the blowing fan blades, the square thin sheets, the stirring rod, the baffle rod, the sliding cylinder, the baffle plate, the vent hole, the annular thin sheets, the sliding rod and the spring technical means, when the smoke enters the first cylinder and the second cylinder, the air is automatically sucked in, and the smoke and air are mixed and injected into the bottom of the furnace body again, so as to achieve better combustion and make full use of the heat, effectively solve the problems raised in the background technology, and then realize the technical effect of automatically mixing the smoke with the air while circulating, improving the smoke re-combustion ability and improving the heat utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall structure of a low-nitrogen burner with a flue gas internal circulation function proposed by the utility model;

[0015] Figure 2 This is a schematic cross-sectional structural diagram of a first cylinder and a second cylinder of a low-nitrogen burner with a flue gas internal circulation function proposed by the utility model;

[0016] Figure 3 This is a schematic diagram of the partial internal structure of the first cylinder of a low-nitrogen burner with a flue gas internal circulation function proposed by the utility model.

[0017] In the figure: 1, bottom plate; 2, furnace body; 3, air outlet; 4, flamethrower; 401, guide pipe; 5, first cylinder; 501, smoke delivery pipe; 502, air inlet; 6, second cylinder; 601, smoking pipe; 7, motor; 701, rotating rod; 8, first transmission wheel; 9, exhaust fan blade; 10, belt; 11, blowing fan blade; 12, square rod; 13, square sheet; 14, round rod; 15, stirring rod; 16, second transmission wheel; 18, baffle; 19, sliding cylinder; 20, annular inclined groove; 21, baffle; 22, vent; 23, annular sheet; 24, slide rod; 25, spring; 26, bump; 27, connecting cover. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0019] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0020] Reference Figure 1-Figure 3A low-nitrogen burner with a flue gas internal circulation function comprises a bottom plate 1, a furnace body 2 is fixedly connected to one side of the top of the bottom plate 1, an air outlet 3 is arranged on the top of the furnace body 2, a first cylinder 5 is fixedly connected to the other side of the top of the bottom plate 1 through a bracket, a smoke delivery pipe 501 is fixedly connected to one end of the first cylinder 5 close to the furnace body 2, and the smoke delivery pipe 501 is fixedly connected to one side of the furnace body 2, a square rod 12 is rotatably connected to the middle of the inner end of the first cylinder 5 away from the furnace body 2, a round rod 14 is fixedly connected to the other end of the square rod 12, a blowing fan blade 11 is fixedly connected to the other end of the round rod 14, a plurality of stirring rods 15 are fixedly connected to the circumferential surface of the round rod 14, a sliding cylinder 19 is slidingly sleeved on the surface of the square rod 12, and the sliding cylinder 19 A square hole matching the square rod 12 is provided in the middle, an annular bevel groove 20 is provided on the circumferential surface of the sliding cylinder 19, a baffle rod 18 is fixedly connected to the inside of the first cylinder 5, and the other end of the baffle rod 18 is slidably connected in the annular bevel groove 20, a baffle plate 21 is fixedly connected to the end of the sliding cylinder 19 away from the furnace body 2, a plurality of vent holes 22 are provided at equal intervals on the circumference of the baffle plate 21, sliding rods 24 are slidably sleeved on both sides of the baffle plate 21, the baffle plate 21 is provided with a circular hole matching the sliding rod 24, the ends of the two sliding rods 24 close to the furnace body 2 are fixedly connected to the same annular thin sheet 23, the other ends of the two sliding rods 24 are fixedly connected to a protrusion 26, and the ends of the two sliding rods 24 close to the protrusion 26 are sleeved with a spring 25.

[0021] In this embodiment, two air inlet holes 502 are provided at one end of the first cylinder 5 away from the furnace body 2, and square thin sheets 13 are rotatably connected to the inner side of the first cylinder 5 near the two air inlet holes 502. The arrangement of the square thin sheets 13 enables the square thin sheets 13 to open and suck air into the first cylinder 5 when the baffle 21 is away from the air inlet holes 502.

[0022] In this embodiment, a connecting cover 27 is fixedly connected to the middle of the top of the first cylinder 5, a second cylinder 6 is fixedly connected to the top of the connecting cover 27, a smoking pipe 601 is fixedly connected to one end of the second cylinder 6 close to the furnace body 2, and the smoking pipe 601 is fixedly connected to one side of the furnace body 2.

[0023] In this embodiment, a motor 7 is fixedly connected to the middle of one end of the second cylinder 6 away from the furnace body 2, and the output end of the motor 7 passes through the second cylinder 6 and is fixedly connected to a rotating rod 701, and the other end of the rotating rod 701 is fixedly connected to an exhaust fan blade 9. The exhaust fan blade 9 can be used to suck the smoke at the top of the furnace body 2 into the second cylinder 6 and the first cylinder 5, and a first transmission wheel 8 is fixedly sleeved on the circumferential surface of the rotating rod 701.

[0024] In this embodiment, a second transmission wheel 16 is fixedly sleeved on one end of the round rod 14 close to the first transmission wheel 8, and a same belt 10 is sleeved between the second transmission wheel 16 and the first transmission wheel 8. Through the arrangement of the belt 10, the first transmission wheel 8 and the second transmission wheel 16, the motor 7 can drive the rotating rod 701 and the square rod 12 to rotate simultaneously.

[0025] In this embodiment, a guide pipe 401 is fixedly connected to the bottom of the other side of the furnace body 2 , and a flamethrower 4 is fixedly connected to the other end of the guide pipe 401 .

[0026] Working principle: When in use, start the flamethrower 4 to transport the flame into the furnace body 2 through the guide tube 401, the heat generated by the flame and the smoke flow upward, start the motor 7, and drive the exhaust fan blades 9 to rotate through the rotating rod 701, so that the smoke at the top of the furnace body 2 can be sucked into the second cylinder 6. Through the arrangement of the first transmission wheel 8, the second transmission wheel 16 and the belt 10, the motor 7 can also drive the round rod 14 and the square rod 12 to rotate, and through the blowing fan blades 11, the smoke passes through the second cylinder 6 and the connecting cover 27 into the first cylinder 5, and is then sent into the furnace body 2 by the blowing fan blades 11. During the rotation of the square rod 12, through the arrangement of the sliding cylinder 19, the annular inclined groove 20 and the blocking rod 18, The sliding cylinder 19 moves back and forth. When the sliding cylinder 19 brings the baffle 21 close to the square sheet 13, the air between the baffle 21 and the first cylinder 5 squeezes the annular sheet 23, so that the spring 25 is compressed, and the air mixes with the flue gas from the vent 22. When the baffle 21 is away from the square sheet 13, the space pressure between the baffle 21 and the first cylinder 5 becomes smaller. At this time, the two square sheets 13 rotate the rod. At this time, the air enters the first cylinder 5 from the air inlet 502. In this way, after the flue gas enters the first cylinder 5, there will be a continuous flow of air mixed with the flue gas. Through the rotation of the stirring rod 15, the flue gas and air are mixed and fully enter the furnace body 2 for full combustion, thereby reducing the emission of nitrogen oxides.

[0027] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A low nitrogen burner with flue gas internal circulation function, comprising a bottom plate (1), characterized in that: The top side of the bottom plate (1) is fixedly connected to a furnace body (2), the top of the furnace body (2) is provided with an air outlet (3), the other side of the top of the bottom plate (1) is fixedly connected to a first cylinder (5) through a bracket, the end of the first cylinder (5) close to the furnace body (2) is fixedly connected to a smoke delivery pipe (501), and the smoke delivery pipe (501) is fixedly connected to one side of the furnace body (2), the middle part of the inner side of the first cylinder (5) away from the furnace body (2) is rotatably connected to a square rod (12), the other end of the square rod (12) is fixedly connected to a round rod (14), the other end of the round rod (14) is fixedly connected to a blower fan blade (11), the circumferential surface of the round rod (14) is fixedly connected to a plurality of stirring rods (15), the surface of the square rod (12) is slidably sleeved with a sliding cylinder (19), and the middle part of the sliding cylinder (19) is provided with a sliding cylinder that is parallel to the square rod (12). The sliding cylinder (19) is provided with an annular inclined groove (20) on its circumferential surface, a baffle rod (18) is fixedly connected to the interior of the first cylinder (5), and the other end of the baffle rod (18) is slidably connected in the annular inclined groove (20), the end of the sliding cylinder (19) away from the furnace body (2) is fixedly connected to a baffle plate (21), a plurality of vent holes (22) are equidistantly provided on the circumference of the baffle plate (21), both sides of the baffle plate (21) are slidably sleeved with sliding rods (24), the baffle plate (21) is provided with a circular hole matching the sliding rods (24), the ends of the two sliding rods (24) close to the furnace body (2) are fixedly connected to the same annular thin sheet (23), the other ends of the two sliding rods (24) are fixedly connected to a protrusion (26), and the ends of the two sliding rods (24) close to the protrusion (26) are sleeved with a spring (25).

2. The low nitrogen burner with flue gas internal circulation function according to claim 1 is characterized in that: Two air inlet holes (502) are provided at one end of the first cylinder (5) away from the furnace body (2), and square thin sheets (13) are rotatably connected to the inner side of the first cylinder (5) near the two air inlet holes (502).

3. The low nitrogen burner with flue gas internal circulation function according to claim 1 is characterized in that: A connection cover (27) is fixedly connected to the middle of the top of the first cylinder (5), and a second cylinder (6) is fixedly connected to the top of the connection cover (27). A smoking pipe (601) is fixedly connected to the end of the second cylinder (6) close to the furnace body (2), and the smoking pipe (601) is fixedly connected to one side of the furnace body (2).

4. The low nitrogen burner with flue gas internal circulation function according to claim 3 is characterized in that: A motor (7) is fixedly connected to the middle of one end of the second cylinder (6) away from the furnace body (2); the output end of the motor (7) passes through the second cylinder (6) and is fixedly connected to a rotating rod (701); the other end of the rotating rod (701) is fixedly connected to an exhaust fan blade (9); and a first transmission wheel (8) is fixedly sleeved on the circumferential surface of the rotating rod (701).

5. The low nitrogen burner with flue gas internal circulation function according to claim 1 is characterized in that: A second transmission wheel (16) is fixedly sleeved on one end of the round rod (14) close to the first transmission wheel (8), and a same belt (10) is sleeved between the second transmission wheel (16) and the first transmission wheel (8).

6. The low nitrogen burner with flue gas internal circulation function according to claim 1 is characterized in that: The other side of the furnace body (2) is provided with a bottom fixedly connected to a guide tube (401), and the other end of the guide tube (401) is fixedly connected to a flame injector (4).

Images