CN210485708U

CN210485708U - Double-hole mixed flow blunt body burner

Info

Publication number: CN210485708U
Application number: CN201921352499.7U
Authority: CN
Inventors: 王金刚; 赵文凯; 秦亮; 刘旭洋
Original assignee: Xian Shiyou University
Current assignee: Xian Shiyou University
Priority date: 2019-08-20
Filing date: 2019-08-20
Publication date: 2020-05-08
Anticipated expiration: 2029-08-20

Abstract

The utility model discloses a blunt body combustor of diplopore mixed flow, include: the device comprises an inlet flange, a fuel inlet, an oxidant inlet, an isolation hole, a first baffle ring, a second baffle ring, a conical blunt body, a connecting rod, a combustor outlet, an outlet flange, a support rod, a bolt and a barrel body; the inlet flange and the outlet flange are arranged at two ends of the cylinder body; the isolating hole is fixed on the inlet flange; the conical blunt body and the second retaining ring are sequentially fixed on the connecting rod; the first retaining ring is positioned between the blunt body and the second retaining ring and is connected with the inner wall of the cylinder body; the connecting rod is connected with the inlet flange and the outlet flange through the supporting rod. The utility model discloses an useful part lies in: (1) the mixing efficiency of the fuel and the oxidant can be improved, and the content of harmful gas can be reduced; (2) the temperature area of the rear half section area of the combustor is homogenized, and the heat transfer efficiency is improved; (3) the dual pore structure is not limited to fuel and oxidant alone, but may be a mixture of two different gaseous media.

Description

Double-hole mixed flow blunt body burner

Technical Field

The utility model relates to a mixed flow combustor, concretely relates to blunt body combustor of diplopore mixed flow belongs to burner technical field.

Background

Energy plays an important role in the development process of the economic society, the demand of human beings on the energy is increased along with the development of the social economy, meanwhile, the problem of more and more serious environmental pollution is caused by low energy utilization efficiency, and the energy conservation and emission reduction are increasingly emphasized by people. The 'combustion' is the main form of energy utilization for human beings at present, and the existing combustors directly mix fuel and air and lack the technical process of premixing fuel and combustion improver. Generally, insufficient mixing of the fuel and oxidant in the burner, low mixing rates, and insufficient combustion due to insufficient intake air or low oxygen content, results in the generation of smoke, SO₂And harmful gases such as NOx pollute the environment. Therefore, the problem to be solved at present is how to reduce the amount of pollutant emissions of the burner and to improve the combustion efficiency.

SUMMERY OF THE UTILITY MODEL

In order to solve the defects of the prior art, the utility model aims to provide a double-hole mixed flow blunt body burner.

In order to achieve the above object, the utility model adopts the following technical scheme:

a dual orifice mixed flow bluff body burner, comprising: the device comprises an inlet flange, a fuel inlet, an oxidant inlet, an isolation hole, a first baffle ring, a second baffle ring, a conical blunt body, a connecting rod, a combustor outlet, an outlet flange and a cylinder body; the inlet flange and the outlet flange are respectively arranged at two ends of the cylinder body; the isolating hole is fixed on one side of the inlet flange facing the cylinder body, and the center of the isolating hole is superposed with the center of the inlet flange; the conical blunt body and the second retaining ring are sequentially fixed on the connecting rod; the cone top of the conical blunt body faces the inlet flange, and the axis is parallel to the cylinder body; the first retaining ring is positioned between the conical blunt body and the second retaining ring and is connected with the inner wall of the cylinder body; two ends of the connecting rod are provided with supporting rods; the support rod is connected with the inlet flange and the outlet flange.

Preferably, the connecting rod is fixedly connected with the inlet flange and the outlet flange through a supporting rod and a bolt.

The utility model discloses an useful part lies in:

(1) the double-hole mixed flow blunt body burner can improve the mixing efficiency of fuel and oxidant, so that the fuel can be fully combusted, and the generation of harmful gas can be reduced.

(2) After the mixed gas is mixed by the double-hole mixed flow blunt body burner, the temperature of the rear half section area of the burner is homogenized, and the heat transfer efficiency is improved.

(3) The dual pore structure is not limited to the entry of fuel and oxidant, but can be a mixture of two different gaseous media.

Drawings

FIG. 1 is a schematic view of an embodiment of a dual orifice mixed flow bluff body burner of the present invention;

FIG. 2 is a schematic view of the structure at the inlet of the dual port mixed flow bluff body combustor of FIG. 1;

FIG. 3 is a schematic view of the structure of the outlet flange of the dual orifice mixed flow blunt body burner of FIG. 1

Meaning indicated in the figures: 1-inlet flange, 2-fuel inlet, 3-oxidant inlet, 4-isolation hole, 5-conical blunt body, 6-connecting rod, 7-first retaining ring, 8-second retaining ring, 9-burner outlet, 10-outlet flange, 11-support rod, 12-bolt and 13-barrel body.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1, 2 and 3, a dual orifice mixed flow blunt body burner comprising: the fuel gas burner comprises an inlet flange 1, a fuel inlet 2, an oxidant inlet 3, an isolation hole 4, a first baffle ring 7, a second baffle ring 8, a conical blunt body 5, a connecting rod 6, a burner outlet 9, an outlet flange 10, a support rod 11, bolts 12 and a barrel body 13; the inlet flange 1 and the outlet flange 10 are respectively arranged at two ends of the cylinder body 13; the isolating hole 4 is fixed on one side of the inlet flange 1 facing the barrel body 13, and the center of the isolating hole 4 is superposed with the center of the inlet flange 1; the conical blunt body 5 and the second baffle ring 8 are fixed on the connecting rod 6 in sequence; the conical top of the conical blunt body 5 faces the inlet flange 1, and the axis is parallel to the cylinder body 13; the first retaining ring 7 is positioned between the conical blunt body 5 and the second retaining ring 8 and is connected with the inner wall of the barrel body 13; two ends of the connecting rod 6 are connected with the supporting rod 11; the support rod 11 is fixedly connected with the inlet flange 1 and the outlet flange 10 through bolts 12.

In actual operation, an oxidant and a fuel respectively enter the double-hole mixed flow blunt body combustor from the fuel inlet 2 and the oxidant inlet 3 at certain initial speeds, and under the interference blocking effect of the conical blunt body 5, the fuel is firstly subjected to circumferential diffusion and is primarily mixed with the entering oxidant to form mixed fluid.

The mixed fluid forms speed backward flow district at 5 afterbody of conical blunt body, can make fuel and oxidant carry out the secondary in that diplopore mixed flow blunt body combustor is inside like this and mix, the homogeneity to the temperature also can play fine effect, setting up of conical blunt body 5 has also played the effect of stable burning to the fuel simultaneously, conical blunt body 5 rear portion can form high temperature flue gas backward flow district and also played fine promotion effect to the ignition of fuel.

After the mixed fluid passes through the first baffle ring 7, the flow speed is increased, the turbulence degree is enhanced, the mixing efficiency of the oxidant and the fuel is enhanced due to the turbulent flow of the mixed fluid, the mixing degree of the fuel and the oxidant is further enhanced, the temperature of the rear half section area tends to be uniform, and the heat transfer efficiency is improved.

Under the action of the second baffle ring 8, the mixed fluid begins to diffuse in the circumferential direction, finally the fully mixed fluid is fully combusted at the outlet 9 of the combustor, and harmful gases such as smoke and SO generated by the fully mixed fuel₂And the NOx content is reduced, and the aims of energy conservation and emission reduction are achieved.

The dual pore structure is not limited to fuel and oxidant alone but may be a mixture of two different gaseous media.

In the stage of the verification example, the verification is carried out by adopting a modeling simulation method, and the three burners of a cone-shaped bluff body, a ring-shaped bluff body and a combined (cone and circular truncated cone) bluff body are simultaneously adopted for comparison. Under the same initial condition, the utility model discloses the combustor with conical blunt ware is slightly lower some than the indoor temperature of combined blunt body combustor, and the NOx through detecting circular cone type blunt body exit is far below combined blunt body, and consequently, conical blunt body structure advantage is obvious.

It should be noted that the above-mentioned embodiments do not limit the present invention in any way, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A dual orifice mixed flow bluff body burner, comprising: the fuel burner comprises an inlet flange (1), a fuel inlet (2), an oxidant inlet (3), an isolation hole (4), a conical blunt body (5), a connecting rod (6), a first baffle ring (7), a second baffle ring (8), a burner outlet (9), an outlet flange (10), a support rod (11) and a barrel body (13); the inlet flange (1) and the outlet flange (10) are respectively arranged at two ends of the cylinder body (13); the isolation hole (4) is fixed on one side, facing the cylinder body (13), of the inlet flange (1), and the center of the isolation hole (4) is overlapped with the center of the inlet flange (1); the conical blunt body (5) and the second baffle ring (8) are sequentially fixed on the connecting rod (6); the cone top of the conical blunt body (5) faces the inlet flange (1), and the axis of the conical blunt body is parallel to the cylinder body (13); the first baffle ring (7) is positioned between the conical blunt body (5) and the second baffle ring (8) and is connected with the inner wall of the cylinder body (13); two ends of the connecting rod (6) are provided with supporting rods (11); the support rod (11) is connected with the inlet flange (1) and the outlet flange (10).

2. The double-hole mixed flow blunt body burner of claim 1, wherein the connecting rod (6) is fixedly connected with the inlet flange (1) and the outlet flange (10) through a support rod (11) and a bolt (12).