Water-cooling full-premixing burner

Abstract

The utility model relates to a water-cooling full-premixing burner which comprises a burning fire grate assembly, the burning fire grate assembly is of a rectangular frame structure, and the interiors of the peripheral side walls of the burning fire grate assembly are of cavity structures which are communicated with one another. A plurality of combustion water-cooling tube bundles and turbulent flame tube bundles which are vertically distributed are arranged in the combustion fire grate assembly, and the two ends of the combustion water-cooling tube bundles and the two ends of the turbulent flame tube bundles communicate with a cavity of the combustion fire grate assembly correspondingly; the sections of the combustion water-cooling tube bundles are rectangular, a channel is arranged between every two adjacent combustion water-cooling tube bundles, mixed gas injection tubes are arranged in the channels, and the turbulent flame tube bundles and the mixed gas injection tubes are arranged in a one-to-one correspondence mode; the forced water-cooling burner is reasonable in structural design, a forced water-cooling structure is adopted in the whole forced water-cooling burner, burning temperature is lowered, generation of nitric oxide is greatly reduced, the working condition of stable burning can be fully achieved, and the content of the nitric oxide and the content of carbon monoxide after burning both reach the national standard or below.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler equipment, in particular to a water-cooled full premix burner. Background Art

[0002] Gas boiler combustion produces nitrogen oxides, which harm the atmospheric environment. The amount of nitrogen oxide emissions mainly depends on the burner that is equipped with the boiler. Currently, the low-nitrogen burners that can meet the requirements on the market include flue gas recirculation low-nitrogen burners and metal mesh surface combustion low-nitrogen burners. These burners have many defects such as large space, high cost and easy clogging. How to solve these problems and reduce the nitrogen oxide emissions of the burner has become an issue to be resolved in the industry. Utility Model Content

[0003] In order to solve the deficiencies in the prior art, the purpose of the utility model is to provide a water-cooled full premix burner for reducing the nitrogen oxide emissions of the burner.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A water-cooled full premix burner, comprising a combustion fire bar assembly, characterized in that: the combustion fire bar assembly is a rectangular frame structure, the two opposite side walls of the combustion fire bar assembly are open structures, and the surrounding side walls of the combustion fire bar assembly are interconnected cavity structures;

[0006] The combustion fire bar assembly is provided with a plurality of vertically distributed combustion water cooling tube bundles and turbulent flame tube bundles, the two ends of which are respectively connected to the cavity of the combustion fire bar assembly, the combustion water cooling tube bundle is arranged at an open position on one side of the combustion fire bar assembly, and the turbulent flame tube bundle is located inside the combustion water cooling tube bundle;

[0007] The cross section of the combustion water-cooling tube bundle is rectangular, and a channel is provided between adjacent combustion water-cooling tube bundles. A mixed gas injection pipe is provided in the channel. The turbulent flame tube bundle and the mixed gas injection pipe are arranged one by one and are located in the center of the inner side of the turbulent flame tube bundle.

[0008] The width of the channel is 3-5 mm, and the aperture of the mixed gas injection pipe is 1 mm.

[0009] The spacing between the turbulent flame tube bundles is 5-10 mm.

[0010] An ignition gun is installed on the side wall of the combustion fire bar assembly.

[0011] A fire viewing hole is installed on the side wall of the combustion fire bar assembly.

[0012] The outer side wall of the combustion fire bar assembly is also provided with a cooling water connection inlet and a cooling water connection outlet which are welded and fixed thereto, and the cooling water connection inlet and the cooling water connection outlet are respectively communicated with the cavity of the combustion fire bar assembly.

[0013] The open side edges of the combustion fire bar assembly are all provided with flanges connected and fixed thereto.

[0014] It also includes a mixed gas hood chamber, which is openly connected to the other side of the combustion fire bar assembly away from the combustion water-cooling tube bundle.

[0015] The beneficial effects of the utility model are: reasonable structural design, the overall adoption of a forced water cooling structure, which reduces the combustion temperature, greatly reduces the generation of nitrogen oxides, can fully achieve a stable combustion condition, and the nitrogen oxide and carbon monoxide contents after combustion are both below the national standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 It is a schematic diagram of the main structure of the combustion fire grate assembly.

[0019] Figure 3 It is a schematic diagram of the main structure of the combustion fire grate assembly (without turbulent flame tube bundle).

[0020] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure of "AA".

[0021] In the figure: 1 mixed gas hood cavity, 2 combustion fire row assembly, 21 combustion water cooling tube bundle, 22 mixed gas injection pipe, 23 turbulent flame tube bundle, 24 cooling water connection inlet, 25 cooling water connection outlet, 26 ignition gun, 27 fire viewing hole, 28 cavity, 29 flange. DETAILED DESCRIPTION

[0022] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0023] according to Figures 1 to 4 As shown: This embodiment provides a water-cooled full premix burner, including a combustion fire row assembly 2 and a mixed gas hood chamber 1, wherein:

[0024] The combustion fire row assembly 2 is a rectangular frame structure, and the front and rear side walls of the combustion fire row assembly 2 are open structures. The interior of the surrounding side walls of the combustion fire row assembly 2 is a cavity 28 structure that is interconnected. The cavity 28 is used for cooling water circulation, and a water cooling effect is achieved through the circulation of cooling water.

[0025] The combustion fire bar assembly 2 is provided with a plurality of vertically distributed mixed gas injection pipes 22, a combustion water cooling tube bundle 21 and a turbulent flame tube bundle 23. The mixed gas injection pipes 22, the combustion water cooling tube bundle 21 and the turbulent flame tube bundle 23 are installed near the rear open position of the combustion fire bar assembly 2. The mixed gas hood chamber 1 is located outside the front open position of the combustion fire bar assembly 2. The two are connected and fixed to each other through respective flanges 29 and maintain a closed connection. The mixed gas hood chamber 1 is installed with components such as a fan and a gas valve.

[0026] Since the combustion water-cooling tube bundle 21 and the turbulent flame tube bundle 23 both adopt a tube structure, the two ends of the combustion water-cooling tube bundle 21 and the turbulent flame tube bundle 23 are respectively connected to the cavity 28 of the combustion fire bar assembly 2, so that the combustion water-cooling tube bundle 21 and the turbulent flame tube bundle 23 can also meet the circulation of cooling water, thereby further enhancing the water cooling effect, reducing the combustion temperature, and reducing the generation of nitrogen oxides. In the installation position of the combustion water-cooling tube bundle 21 and the turbulent flame tube bundle 23, the combustion water-cooling tube bundle 21 is arranged close to the open position of the combustion fire bar assembly 2, and the turbulent flame tube bundle 23 is located on the inner side of the combustion water-cooling tube bundle 21; through the cavity 28, the combustion water-cooling tube bundle 21 and the turbulent flame tube bundle 23, it can be achieved that there is continuous cooling water to force cooling the combustion fire bar assembly 2;

[0027] In the specific shapes of the combustion water-cooled tube bundle 21 and the turbulent flame tube bundle 23, the cross-section of the combustion water-cooled tube bundle 21 is rectangular, which makes full use of the structural space and ensures a good cooling water flow rate. The cross-section of the turbulent flame tube bundle 23 is circular. At the same time, the combustion water-cooled tube bundle 21 and the turbulent flame tube bundle 23 are respectively arranged in a row evenly distributed. A channel is provided between adjacent combustion water-cooled tube bundles 21, and the channel width is 3mm. A mixed gas injection pipe 22 is provided in the channel, and the aperture of the mixed gas injection pipe 22 is 1mm. The turbulent flame tube bundle 23 is arranged one by one with the mixed gas injection pipe 22, and is located at the inner side of the turbulent flame tube bundle 23. The spacing between the turbulent flame tube bundles 23 is 8mm, which can meet the stability of combustion.

[0028] At the same time, an ignition gun 26 and a fire observation hole 27 are installed on the side wall of the combustion fire bar assembly 2, which are used to ignite the gas of the mixed gas injection pipe 22 and observe the combustion effect.

[0029] The outer side wall of the combustion fire bar assembly 2 is also provided with a cooling water connection inlet 24 and a cooling water connection outlet 25 welded and fixed thereto. The cooling water connection inlet 24 is located on the top outer side wall of the combustion fire bar assembly 2, and the cooling water connection outlet 25 is located on the bottom outer side wall of the combustion fire bar assembly 2. The cooling water connection inlet 24 and the cooling water connection outlet 25 are respectively connected to the cavity 28 of the combustion fire bar assembly 2, so as to meet the connection with the external pipeline, thereby realizing the entry and exit of cooling water.

[0030] The above description is only a preferred implementation mode of the present utility model. As long as the technical solution of the purpose of the present utility model is achieved by basically the same means, it belongs to the protection scope of the present utility model.

Claims

1. A water-cooled fully premixed burner, comprising a combustion fire row assembly, characterized in that: The combustion fire bar assembly is a rectangular frame structure, the two opposite side walls of the combustion fire bar assembly are open structures, and the interior of the surrounding side walls of the combustion fire bar assembly is a cavity structure that is interconnected; The combustion fire bar assembly is provided with a plurality of vertically distributed combustion water cooling tube bundles and turbulent flame tube bundles, the two ends of which are respectively connected to the cavity of the combustion fire bar assembly, the combustion water cooling tube bundle is arranged at an open position on one side of the combustion fire bar assembly, and the turbulent flame tube bundle is located inside the combustion water cooling tube bundle; The cross section of the combustion water-cooling tube bundle is rectangular, and a channel is provided between adjacent combustion water-cooling tube bundles. A mixed gas injection pipe is provided in the channel. The turbulent flame tube bundle and the mixed gas injection pipe are arranged one by one and are located in the center of the inner side of the turbulent flame tube bundle.

2. The water-cooled fully premixed burner according to claim 1, characterized in that: The width of the channel is 3-5 mm, and the aperture of the mixed gas injection pipe is 1 mm.

3. The water-cooled fully premixed burner according to claim 1, characterized in that: The spacing between the turbulent flame tube bundles is 5-10 mm.

4. The water-cooled fully premixed burner according to claim 1, characterized in that: An ignition gun is installed on the side wall of the combustion fire bar assembly.

5. The water-cooled fully premixed burner according to claim 1, characterized in that: A fire viewing hole is installed on the side wall of the combustion fire bar assembly.

6. The water-cooled fully premixed burner according to claim 1, characterized in that: The outer side wall of the combustion fire bar assembly is also provided with a cooling water connection inlet and a cooling water connection outlet which are welded and fixed thereto, and the cooling water connection inlet and the cooling water connection outlet are respectively communicated with the cavity of the combustion fire bar assembly.

7. The water-cooled fully premixed burner according to claim 1, characterized in that: The open side edges of the combustion fire bar assembly are all provided with flanges connected and fixed thereto.

8. The water-cooled fully premixed burner according to claim 1, characterized in that: It also includes a mixed gas hood chamber, which is openly connected to the other side of the combustion fire bar assembly away from the combustion water-cooling tube bundle.

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