Premixing type burner

Abstract

The utility model relates to a premixing type burner which comprises a shell, a fuel gas inlet pipeline, an air inlet pipeline, a metal net supporting frame, a metal net, an ignition device, a conical pipe, an air flow uniformizing piece, a mixing flow channel and an upper conical pipe. The metal net supporting frame and the ignition device are arranged at an opening in the top of the shell, the lower conical pipe, the mixing flow channel and the upper conical pipe are sequentially arranged in the shell from bottom to top, the lower end of the lower conical pipe is communicated with the fuel gas inlet pipeline, and the air flow uniformizing piece is arranged on the outer side wall of the lower conical pipe. According to the premixing type burner, the lower conical pipe, the mixing flow channel and the upper conical pipe are arranged in the premixing type burner, high-pressure fuel gas is injected into the lower conical pipe, the lower conical pipe generates negative pressure to suck air in a rolling mode, and the air enters the lower conical pipe after being subjected to flow equalizing through the air flow equalizing piece. Therefore, the burner is high in burning efficiency and sufficient in burning.

Description

Technical Field

[0001] The utility model relates to the technical field of burners, in particular to a premix burner. Background Art

[0002] The burner of the existing steam generating device is used to bake the heat exchanger so that the water in the heat exchanger evaporates. However, the existing burner has incomplete combustion, complex body structure, low combustion efficiency, unstable combustion, high manufacturing cost, narrow adjustment range, and poor market applicability. Therefore, the structure of the existing burner needs to be further improved. Utility Model Content

[0003] The utility model aims to provide a premix burner with high combustion efficiency and complete combustion.

[0004] The purpose of the utility model is achieved in this way:

[0005] The ventilator is a kind of premix burner, comprising an outer shell, a gas inlet pipe, an air inlet pipe, a metal mesh support frame, a metal mesh and an ignition device. The gas inlet pipe and the air inlet pipe are arranged at the bottom of the outer shell, the metal mesh support frame and the ignition device are arranged at the top opening of the outer shell, and the metal mesh is arranged on the metal mesh support frame. The burner is characterized in that it also comprises a lower conical tube, an air flow equalizer, a mixing flow channel and an upper conical tube. The lower conical tube, the mixing flow channel and the upper conical tube are arranged in the outer shell in sequence from bottom to top. The lower conical tube is in the shape of a trumpet with a narrow upper part and a wide lower part, and the upper conical tube is in the shape of a trumpet with a wide upper part and a narrow lower part. The lower end of the lower conical tube is connected with the gas inlet pipe, the air flow equalizer is arranged on the outer side wall of the lower conical tube, the air flow equalizer connects the air inlet pipe and the lower conical tube, the upper end of the lower conical tube is connected with the bottom end of the mixing flow channel, the air inlet pipe is connected with the side of the lower conical tube, and the inner end of the gas inlet pipe faces the bottom end of the mixing flow channel. The utility model is provided with a lower conical tube, a mixing flow channel and an upper conical tube inside, and the high-pressure gas is injected into the lower conical tube, and the lower conical tube generates negative pressure, and the air is sucked in, and the air enters the lower conical tube after being uniformly flowed through the air uniform flow member. The gas and air of the premixed burner of the utility model are uniformly mixed, so the utility model has high combustion efficiency and complete combustion.

[0006] The present invention can also be further improved as follows.

[0007] The lower end of the upper conical tube is provided with a spiral guide blade.

[0008] A flame arrester is arranged in the upper conical tube.

[0009] The diameter of the lower conical tube is smaller than the diameter of the upper conical tube.

[0010] The length of the lower tapered tube is shorter than the length of the upper tapered tube.

[0011] The outer shell includes a lower shell and an upper shell connected to each other, the tops of the lower shell and the upper shell are open, the metal mesh support frame, the metal mesh, and the ignition device are arranged in the upper shell, the lower conical tube, the mixing flow channel, the upper conical tube and the air flow equalizer are arranged in the lower shell, and the gas inlet pipe and the air inlet pipe are arranged on the lower shell.

[0012] A first regulating valve is arranged on the gas inlet pipeline, and a second regulating valve is arranged on the air inlet pipeline.

[0013] The beneficial effects of the utility model are as follows:

[0014] 1. The utility model is provided with a lower conical tube, a mixing flow channel and an upper conical tube. High-pressure gas is injected into the lower conical tube, and the lower conical tube generates negative pressure, and air is sucked in. The air enters the lower conical tube after being uniformly flowed through the air uniformizer. The gas and air of the premixed burner of the utility model are evenly mixed, so the utility model has high combustion efficiency and full combustion. In addition, the burner of the utility model no longer relies on additional fans to assist in air supply, which can reduce energy consumption and cost. The premixed burner of the utility model is energy-saving and safe, and has low power consumption.

[0015] 2. The utility model is provided with a flame arrester inside to prevent the flashback phenomenon caused by low gas pressure, thereby ensuring the safe operation of the burner.

[0016] 3. When the utility model burns, the theoretical air volume can be distributed to each combustion hole in the metal mesh according to a suitable proportion, so as to achieve complete combustion, generate a small amount of nitrogen oxides, and emit less pollutant gases.

[0017] 4. The power adjustment range of the premix burner of the utility model is wide, and the adjustment ratio of stable operation is high. Adjusting valves are set for the air inlet pipeline and the gas inlet pipeline, and the valve opening is changed to achieve the flow of air and gas to achieve a stable burner power load, so that the combustion equipment no longer meets the single power combustion body and configures the burner separately. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the premixed burner of the utility model ( Figure 1 The arrows in the diagram indicate the direction of gas or air flow). DETAILED DESCRIPTION

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Embodiment 1, as Figure 1As shown, a premix burner includes a shell 1, a gas inlet pipe 12, an air inlet pipe 11, a metal mesh support frame 9, a metal mesh 7, a lower conical tube 13, an air flow equalizer 2, a mixing flow channel 3, an upper conical tube 5 and an ignition device 6. The gas inlet pipe 12 and the air inlet pipe 11 are arranged at the bottom of the shell 1, the metal mesh support frame 9 and the ignition device 6 are arranged at the top opening of the shell 1, the metal mesh 7 is arranged on the metal mesh support frame 9, and the lower conical tube 13, the mixing flow channel 3 and the upper conical tube 5 are arranged from bottom to top. They are arranged in the outer shell 1 in sequence, the lower conical tube 13 is in the shape of a trumpet with a narrow upper part and a wide lower part, the upper conical tube 5 is in the shape of a trumpet with a wide upper part and a narrow lower part, the lower end of the lower conical tube 13 is connected with the gas inlet pipe 12, the air uniform flow member 2 is arranged on the outer side wall of the lower conical tube 13, the air uniform flow member 2 connects the air inlet pipe 11 and the lower conical tube 13, the upper end of the lower conical tube 13 is connected with the bottom end of the mixing flow channel 3, the air inlet pipe 11 is connected with the side of the lower conical tube 13, and the inner end of the gas inlet pipe 12 is opposite to the bottom end of the mixing flow channel 3.

[0021] As a more specific technical solution of the utility model.

[0022] The lower end of the upper conical tube 5 is provided with a spiral guide blade 4 .

[0023] A flame arrester 14 is arranged inside the upper conical tube 5 .

[0024] It also includes an air flow equalizer 2 , which is arranged on the outer wall of the lower conical tube 13 . An air inlet hole is arranged on the outer wall of the lower conical tube 13 . The air flow equalizer 2 connects the air inlet pipe 11 and the lower conical tube 13 .

[0025] The diameter of the lower conical tube 13 is smaller than the diameter of the upper conical tube 5 .

[0026] The length of the lower conical tube 13 is shorter than the length of the upper conical tube 5 .

[0027] The outer shell 1 includes a lower shell 17 and an upper shell 18 which are connected to each other. The tops of the lower shell and the upper shell 18 are open. The metal mesh support frame 9, the metal mesh 7, and the ignition device 6 are arranged in the upper shell 18. The lower conical tube 13, the mixing flow channel 3, the upper conical tube 5 and the air flow equalizer 2 are arranged in the lower shell 17. The gas inlet pipe and the air inlet pipe are arranged on the lower shell.

[0028] A first regulating valve 15 is provided on the gas inlet pipeline, and a second regulating valve 16 is provided on the air inlet pipeline.

[0029] The working principle of the utility model is as follows: high-pressure gas is sprayed into the lower conical tube 13 through the gas inlet pipe, and the high-speed gas enters the lower conical tube 13 to generate local negative pressure to suck the air sent into the lower conical tube 13 through the air inlet pipe 11. The air enters the lower conical tube 13 after being uniformly flowed by the air uniform flow member 2, and the air and the gas are mixed in the mixing flow channel 3, and then enter the upper conical tube 5. The high-speed mixed gas generates suction due to the increase in the flow velocity and the increase in static pressure due to the increase in the cross-section of the conical tube. The high-speed mixed gas is guided into the flame arrester 14 through the spiral guide blades, and the air and the gas are uniformly mixed again in the flame arrester 14, and then sprayed upward out of the metal mesh 7, and the ignition device 6 ignites the mixed gas to achieve stable combustion.

Claims

1. A premix burner, comprising a housing, a gas inlet pipe, an air inlet pipe, a metal mesh support frame, a metal mesh and an ignition device, wherein the gas inlet pipe and the air inlet pipe are arranged at the bottom of the housing, the metal mesh support frame and the ignition device are arranged at the top opening of the housing, and the metal mesh is arranged on the metal mesh support frame, wherein: The utility model also includes a lower conical tube, an air flow equalizer, a mixing flow channel and an upper conical tube. The lower conical tube, the mixing flow channel and the upper conical tube are arranged in the outer shell from bottom to top in sequence. The lower conical tube is in the shape of a trumpet which is narrow at the top and wide at the bottom. The upper conical tube is in the shape of a trumpet which is wide at the top and narrow at the bottom. The lower end of the lower conical tube is connected with the gas inlet pipe. The air flow equalizer is arranged on the outer side wall of the lower conical tube. The air flow equalizer connects the air inlet pipe and the lower conical tube. The upper end of the lower conical tube is connected with the bottom end of the mixing flow channel. The air inlet pipe is connected with the side of the lower conical tube. The inner end of the gas inlet pipe faces the bottom end of the mixing flow channel.

2. The premix burner according to claim 1, characterized in that: The lower end of the upper conical tube is provided with a spiral guide blade.

3. The premix burner according to claim 1, characterized in that: A flame arrester is arranged in the upper conical tube.

4. The premix burner according to claim 1, characterized in that: The diameter of the lower conical tube is smaller than the diameter of the upper conical tube.

5. The premix burner according to claim 1, characterized in that: The length of the lower tapered tube is shorter than the length of the upper tapered tube.

6. The premix burner according to claim 1, characterized in that: The outer shell includes a lower shell and an upper shell connected to each other, the tops of the lower shell and the upper shell are open, the metal mesh support frame, the metal mesh, and the ignition device are arranged in the upper shell, the lower conical tube, the mixing flow channel, the upper conical tube and the air flow equalizer are arranged in the lower shell, and the gas inlet pipe and the air inlet pipe are arranged on the lower shell.

7. The premix burner according to claim 1, characterized in that: A first regulating valve is arranged on the gas inlet pipeline, and a second regulating valve is arranged on the air inlet pipeline.

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