A boiler burner and a boiler

Abstract

The utility model relates to a kind of boiler burner and boiler, including flue gas pipe, branch pipe, burner body and flue gas utilization mechanism, the flue gas pipe bottom is connected with branch pipe, flue gas utilization mechanism is equipped between the burner body and branch pipe, the flue gas generated in boiler enters flue gas pipe, adjustable control valve body on flue gas pipe, with the control valve body on branch pipe, make part of flue gas enter branch pipe, wherein, flue gas pipe outside connection filtering equipment, by starting air sending spare, flue gas in branch pipe is sent into combustion chamber in burner body, specifically, start centrifugal fan, outside air is sucked into inlet pipe, by air through conical groove in inlet pipe, into branch pipe, since branch pipe exhaust end is located in exhaust pipe, airflow is rapidly from branch pipe into exhaust pipe, make in negative pressure chamber in box body, produce negative pressure, flue gas is passed through branch pipe and enters box body, from exhaust pipe into burner body.

Description

Technical Field

[0001] This utility model relates to the field of boiler burner technology, specifically a boiler burner and a boiler. Background Technology

[0002] In boiler burners, the flue gas produced after fuel combustion is usually discharged directly into the atmosphere through the flue or discharged after only simple purification treatment. The temperature of this flue gas is generally between 150-300℃, carrying a large amount of sensible heat, and also contains some unburned combustible components, which are not effectively utilized.

[0003] During combustion, nitrogen reacts with oxygen at high temperatures to produce nitrogen oxides, making it impossible to make reasonable use of the flue gas. The combustion atmosphere cannot be adjusted through recycling, and the waste heat it carries can preheat the combustion air or fuel. This inadequate utilization of resources results in low energy efficiency and high cost of pollutant emission control in boiler operation. Therefore, we need to provide a boiler burner and boiler. Utility Model Content

[0004] The purpose of this utility model is to provide a boiler burner and boiler, which is equipped with a flue gas utilization mechanism connected to the burner body, which can transport the flue gas generated by the boiler to the burner body and utilize the components and heat in the flue gas, thereby significantly improving energy utilization efficiency and solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a boiler burner, comprising:

[0006] The flue gas pipe, the branch pipe, the burner body and the flue gas utilization mechanism are provided. The bottom of the flue gas pipe is connected to the branch pipe. The flue gas utilization mechanism is provided between the burner body and the branch pipe. The exhaust end of the flue gas utilization mechanism is located in the inner cavity of the burner body and is used to send the flue gas into the burner body for reuse.

[0007] The flue gas utilization mechanism includes a box body, an exhaust pipe, and an air supply component. The box body is connected to a branch pipe, and an exhaust pipe is connected between the box body and the burner body. An air supply component is provided on the top of the box body.

[0008] Preferably, the air supply component includes an air inlet pipe, a centrifugal fan, and a negative pressure section. The air inlet pipe is connected to the top of the housing and the centrifugal fan is connected to the top. The negative pressure section is located at the bottom of the air inlet pipe and is used to send the flue gas in the branch pipe into the exhaust pipe.

[0009] Preferably, the negative pressure section includes a negative pressure chamber and a branch pipe. The branch pipe is connected to the bottom of the air inlet pipe, and the exhaust port of the branch pipe is located at the air inlet of the exhaust pipe. The negative pressure chamber is located inside the box and is connected to the air supply pipe and the air inlet pipe.

[0010] Preferably, the air inlet pipe is equipped with a regulating valve, and the air inlet of the centrifugal fan is detachably connected to a filter screen.

[0011] Preferably, both the flue pipe and the branch pipe are provided with control valve bodies.

[0012] Preferably, a support base is fixedly installed at the bottom of the burner body, and a mounting bracket is fixedly installed on one side of the support base.

[0013] Preferably, the bottom of the intake pipe is provided with a tapered structure that is wider at the top and narrower at the bottom.

[0014] On the other hand, this utility model proposes a boiler including the above-mentioned burner.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This utility model is equipped with a flue gas utilization mechanism connected to the burner body, which can transport the flue gas generated by the boiler to the burner body and utilize the components and heat in the flue gas, which can significantly improve energy utilization efficiency. The waste heat carried by the flue gas is directly introduced into the combustion chamber, reducing heat loss. At the same time, the inert components in the flue gas can reduce the oxygen concentration in the combustion zone and inhibit the generation of nitrogen oxides, which can reduce the investment and operating costs of denitrification equipment. The unburned combustible components are burned in the combustion chamber, reducing energy waste and pollutant emissions. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a front view of the structure of this utility model;

[0019] Figure 3 This is a perspective view of the flue gas utilization mechanism of this utility model;

[0020] Figure 4 This is a three-dimensional sectional view of the negative pressure part of this utility model.

[0021] In the diagram: 1. Flue gas pipe; 2. Branch pipe; 3. Burner body; 4. Flue gas utilization mechanism; 41. Box body; 42. Exhaust pipe; 43. Gas supply component; 431. Inlet pipe; 432. Centrifugal fan; 433. Negative pressure section; 4331. Negative pressure chamber; 4332. Branch pipe; 5. Regulating valve; 6. Filter screen; 7. Control valve body; 8. Support base; 9. Mounting bracket. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-4 The present invention provides a technical solution: a boiler burner, comprising: a flue gas pipe 1, a branch pipe 2, a burner body 3 and a flue gas utilization mechanism 4. The bottom of the flue gas pipe 1 is connected to the branch pipe 2. The flue gas utilization mechanism 4 is provided between the burner body 3 and the branch pipe 2. The exhaust end of the flue gas utilization mechanism 4 is located in the inner cavity of the burner body 3, and is used to send the flue gas into the burner body 3 for reuse.

[0024] The flue gas utilization mechanism 4 includes a box 41, an exhaust pipe 42, and an air supply component 43. The box 41 is connected to the branch pipe 2, and the exhaust pipe 42 is connected between the box 41 and the burner body 3. The air supply component 43 is provided on the top of the box 41.

[0025] Specifically, a flue gas utilization mechanism 4 is connected to the burner body 3, which can transport the flue gas generated by the boiler into the burner body 3 to utilize the components and heat in the flue gas, which can significantly improve energy utilization efficiency. The waste heat carried by the flue gas is directly introduced into the combustion chamber, reducing heat loss. At the same time, the inert components in the flue gas can reduce the oxygen concentration in the combustion zone and inhibit the generation of nitrogen oxides, which can reduce the investment and operating costs of denitrification equipment. The unburned combustible components are burned in the combustion chamber, reducing energy waste and pollutant emissions.

[0026] The air supply component 43 includes an air inlet pipe 431, a centrifugal fan 432, and a negative pressure section 433. The air inlet pipe 431 is connected to the top of the box body 41, and the centrifugal fan 432 is connected to the top. The negative pressure section 433 is located at the bottom of the air inlet pipe 431 and is used to send the flue gas in the branch pipe 2 into the exhaust pipe 42.

[0027] Furthermore, the top end of the intake pipe 431 is sealed to the outlet of the centrifugal fan 432 via a flange, and the bottom end of the intake pipe 431 vertically penetrates the top of the box body 41 and extends into the interior of the box body 41. The penetration point between the intake pipe 431 and the box body 41 is sealed with a high-temperature resistant sealing ring. The negative pressure section 433 is located at the bottom of the intake pipe 431 and is connected to the intake pipe 431. It can generate negative pressure when the air flows in the intake pipe 431, drawing the flue gas in the branch pipe 2 into the box body 41, and then sending it into the burner body 3 through the exhaust pipe 42. Power is provided by the centrifugal fan 432. Combined with the negative pressure effect of the negative pressure section 433, the stable delivery of flue gas is achieved.

[0028] The negative pressure section 433 includes a negative pressure chamber 4331 and a branch pipe 4332. The branch pipe 4332 is connected to the bottom of the air inlet pipe 431, and the exhaust port of the branch pipe 4332 is located at the air inlet of the exhaust pipe 42. The negative pressure chamber 4331 is located inside the box 41 and is connected to the air supply pipe and the air inlet pipe 431.

[0029] It is worth noting that the negative pressure chamber 4331 is a hollow structure inside the box 41, and is connected to both the branch pipe 2 and the exhaust pipe 42; one end of the branch pipe 4332 is connected to the bottom of the intake pipe 431, and the other end extends to the air inlet of the exhaust pipe 42, with a gap between the exhaust end of the branch pipe 4332 and the air inlet of the exhaust pipe 42; the branch pipe 4332 is made of high-temperature resistant alloy material, and its diameter gradually decreases from the end connected to the intake pipe 431 to the exhaust end, forming a converging nozzle structure. When the centrifugal fan 432 sends air into the intake pipe 431, the air passes through... The conical structure at the bottom of the intake pipe 431 accelerates the air into the branch pipe 4332 and ejects it at high speed from the exhaust end of the branch pipe 4332. Due to the momentum exchange of the fluid, a negative pressure is generated in the gap between the exhaust end of the branch pipe 4332 and the air inlet of the exhaust pipe 42, which causes the flue gas in the negative pressure chamber 4331 to be drawn into the exhaust pipe 42, realizing the initial mixing of flue gas and air. The negative pressure is generated by utilizing the principle of fluid mechanics, without the need for an additional power device, saving energy. At the same time, the scaling nozzle structure increases the air velocity, enhances the negative pressure effect, and improves the flue gas intake efficiency.

[0030] An regulating valve 5 is provided inside the air inlet pipe 431, and a filter screen 6 is detachably connected to the air inlet of the centrifugal fan 432;

[0031] It should be noted that the centrifugal fan 432 is fixed to the mounting base on the top of the housing 41 by bolts. Its air inlet is connected to a filter cylinder 6 via threads. The filter cylinder 6 is made of 304 stainless steel and has a double-layer filter: an inner 100-mesh metal mesh and an outer activated carbon adsorption layer, which can filter dust and impurities in the air. Simultaneously, the filter cylinder 6 prevents impurities from entering the burner body 3 and affecting combustion efficiency, solving the problem of impurity contamination during traditional flue gas delivery. A regulating valve 5 is installed inside the air inlet pipe 431. The regulating valve 5 is a butterfly valve structure, allowing air to pass through... Driven by a motor and electrically connected to an external PLC controller, the airflow in the intake pipe 431 can be adjusted in real time according to the temperature and oxygen content inside the burner body 3. The filter cylinder 6 at the air intake of the centrifugal fan 432 is detachably connected to the centrifugal fan 432 via a snap-fit, facilitating regular cleaning and replacement. The setting of the regulating valve 5 enables precise control of the airflow, making the mixing ratio of flue gas and air more reasonable, ensuring the stability and efficiency of combustion. The detachable design of the filter cylinder 6 solves the problem of inconvenient cleaning and replacement of traditional filters, reducing maintenance costs.

[0032] Both the flue pipe 1 and the branch pipe 2 are equipped with control valve bodies 7;

[0033] Furthermore, the control valve body 7 is an electric ball valve, which is electrically connected to an external PLC controller and can precisely control the flue gas flow rate in flue gas pipe 1 and branch pipe 2; the surface is coated with a high-temperature resistant and anti-corrosion coating. The electric ball valve enables precise adjustment of the flue gas diversion ratio and can flexibly adjust the amount of flue gas entering branch pipe 2 according to the boiler's operating conditions.

[0034] A support base 8 is fixedly installed at the bottom of the burner body 3, and a mounting bracket 9 is fixedly installed on one side of the support base 8;

[0035] The support base 8 is made of cast iron and is fixed to the ground with anchor bolts. A mounting bracket 9 is fixedly installed on one side of the support base 8. The mounting bracket 9 is a welded angle steel structure used to fix the relevant pipes of flue gas pipe 1, branch pipe 2 and flue gas utilization mechanism 4. The cast iron material of the support base 8 has high strength and stability, ensuring the stable operation of the burner body 3. The mounting bracket 9 is used for placing the boiler, and the burner body 3 is connected to the boiler.

[0036] The bottom of the intake pipe 431 is provided with a tapered structure that is wider at the top and narrower at the bottom.

[0037] The cone-shaped structure has a cone angle of 60-90 degrees and is manufactured by integrally molding with the intake pipe 431. It is made of high-temperature resistant stainless steel, which can accelerate the air in the intake pipe 431, increase the airflow velocity when entering the branch pipe 4332, enhance the negative pressure effect of the negative pressure section 433, and thus improve the smoke intake efficiency. The integral molding manufacturing method ensures the connection strength between the cone-shaped structure and the intake pipe 431, and the high-temperature resistant stainless steel material is suitable for high-temperature smoke environment, extending the service life of the intake pipe 431.

[0038] On the other hand, this embodiment proposes a boiler, including a burner. The burner body 3, centrifugal fan 432, regulating valve 5 and control valve body 7 involved in this application are all implemented using existing mature technologies and are connected to an external PLC controller and power supply. This is a conventional technical means in this field, so its specific circuit connection, control logic and working process will not be described in detail.

[0039] The flue gas generated in the boiler of this device enters the flue gas pipe 1. The control valve 7 on the flue gas pipe 1 and the control valve 7 on the branch pipe 2 can be adjusted to allow part of the flue gas to enter the branch pipe 2. The flue gas pipe 1 is externally connected to a filter device. By activating the air supply component 43, the flue gas in the branch pipe 2 is sent into the combustion chamber of the burner body 3. Specifically, the centrifugal fan 432 is activated to draw in external air into the air inlet pipe 431. The air passes through the conical groove in the air inlet pipe 431 and enters the branch pipe 4332. Since the exhaust end of the branch pipe 4332 is located in the exhaust pipe... Inside 42, the airflow quickly enters the exhaust pipe 42 from the branch pipe 4332, creating a negative pressure in the negative pressure chamber 4331 inside the box 41. The flue gas enters the box 41 through the branch pipe 2 and then enters the burner body 3 through the exhaust pipe 42. The flue gas temperature is too high and will not pass through the centrifugal fan 432, thereby extending the service life of the centrifugal fan 432. The high-temperature flue gas is reused. The box 41 and the gas pipe in this application are both heat-insulated pipes. At the same time, a heat insulation ring is provided at the connection between the centrifugal fan 432 and the air inlet pipe 431 to reduce heat transfer.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A boiler burner, characterized in that, include: The flue gas pipe (1), the branch pipe (2), the burner body (3) and the flue gas utilization mechanism (4) are provided. The bottom of the flue gas pipe (1) is connected to the branch pipe (2). The flue gas utilization mechanism (4) is provided between the burner body (3) and the branch pipe (2). The exhaust end of the flue gas utilization mechanism (4) is located in the inner cavity of the burner body (3) and is used to send the flue gas into the burner body (3) for reuse. The flue gas utilization mechanism (4) includes a box body (41), an exhaust pipe (42) and an air supply component (43). The box body (41) is connected to the branch pipe (2). The exhaust pipe (42) is connected between the box body (41) and the burner body (3). The air supply component (43) is provided on the top of the box body (41).

2. A boiler burner according to claim 1, characterized in that: The air supply component (43) includes an air inlet pipe (431), a centrifugal fan (432), and a negative pressure section (433). The air inlet pipe (431) is connected to the top of the box body (41), and the centrifugal fan (432) is connected to the top. The negative pressure section (433) is located at the bottom of the air inlet pipe (431) and is used to send the flue gas in the branch pipe (2) into the exhaust pipe (42).

3. A boiler burner according to claim 2, characterized in that: The negative pressure section (433) includes a negative pressure chamber (4331) and a branch pipe (4332). The branch pipe (4332) is connected to the bottom of the air inlet pipe (431), and the exhaust port of the branch pipe (4332) is located at the air inlet of the exhaust pipe (42). The negative pressure chamber (4331) is located inside the box body (41) and is connected to the air supply pipe and the air inlet pipe (431).

4. A boiler burner according to claim 2, characterized in that: The air inlet pipe (431) is equipped with a regulating valve (5), and the air inlet of the centrifugal fan (432) is detachably connected with a filter screen (6).

5. A boiler burner according to claim 1, characterized in that: Both the flue pipe (1) and the branch pipe (2) are equipped with control valve bodies (7).

6. A boiler burner according to claim 1, characterized in that: A support base (8) is fixedly installed at the bottom of the burner body (3), and a mounting bracket (9) is fixedly installed on one side of the support base (8).

7. A boiler burner according to claim 2, characterized in that: The bottom of the air intake pipe (431) is provided with a tapered structure that is wider at the top and narrower at the bottom.

8. A boiler, characterized in that, Includes the boiler burner as described in any one of claims 1-7.

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