CN201391866Y

CN201391866Y - Pre-mixed combustor

Info

Publication number: CN201391866Y
Application number: CN200920041464U
Authority: CN
Inventors: 朱桂章
Original assignee: Individual
Current assignee: Individual
Priority date: 2009-04-01
Filing date: 2009-04-01
Publication date: 2010-01-27
Anticipated expiration: 2019-04-01

Abstract

The utility model discloses a pre-mixed combustor which comprises a gas guide tube, a combustion head and screws. The gas guide tube adopts multi-segment variable-diameter structure, and both ends of the middle segment circular tube are respectively connected with a gas inlet and a gas outlet through extended conical tubes. Radial notches are symmetrically arranged on the outer wall of the joint part of the gas inlet on the lower end and the conical tube, the combustion head is filled in the gas outlet on the upper end and the gas outlet is radially locked by the screws. The inner hole of the combustion head is a main combustion port, a plurality of micro gas pores are arranged on the circumference of the inner hole to form an auxiliary combustion port. Fuel gas flows in through the gas inlet and is sufficiently mixed with air through the guide tube with multi-segment transverse variable sections, and the combustion is more sufficient. When the mixed gas sprayed from the micro gas pores is ignited, the formed flame surrounds the flame in the main combustion port and prevents the flame in the main combustion port from spreading so that columnar long flame is formed, the heat efficiency is improved and the pre-mixed combustor is applicable to various fuel gas heating equipments.

Description

Pre-mixing type combustion apapratus

Technical field

The utility model relates to a kind of gas burner, and specifically, the utility model relates to a kind of with combustion gas and the burner that burns again after air fully mixes.

Background technology

Inflammable gases such as natural gas, oil liquefied gas and coal gas are a kind of calorific value height, clear energy sources easy to use, are used widely in civilian and industrial furnace.The efficiency of combustion of gas-fired equipment and burner structure have crucial relation.For many years, people constantly study burner structure, in the hope of obtaining higher efficiency of combustion.The burner structure of prior art mainly contains mixing tube premix nozzle and adds two kinds of forms that injector mixes, these two kinds of structures all with combustion gas as original power, regulate fired heat duty by regulating gas flow.Although prior art can realize effectively regulating gas flow, because of structure unreasonable, the gaseous-pressure instability in the burner, it is inhomogeneous to cause combustion gas to mix with air, it is insufficient to burn, column flame is stablized in difficult formation.

The utility model content

The utility model is primarily aimed at the deficiencies in the prior art, a kind of pre-mixing type combustion apapratus of reducer pipe structure is proposed, this structure is utilized wireway more piece mutation structure, make the combustion gas of circulation suck air, compressed again, diffusion mixing process, form uniform mist, create conditions, long, stable and easy adjusting of the flame that produces during burning for fully burning.

The utility model is achieved through the following technical solutions technical goal.

Pre-mixing type combustion apapratus, it comprises the wireway of tubulose, the combustion head and the screw of flange-like.Its improvements are: described wireway is a more piece reducer pipe structure, and pipe two ends, stage casing connect air inlet and gas outlet respectively by the conical pipe that extends out.Be on the air inlet of lower end and the conical pipe junction outer wall and be symmetrical arranged the wide radial slot of 7～11mm.Being in the gas outlet of upper end plug adorns combustion head and is radially locked by screw; Described combustion head is main port with endoporus, little pore of the uniform Φ 1.5～2.5mm of ring endoporus one-week interval 4～6mm.

In the said structure, combustion head is flange-like, its flange and gas outlet endoporus matched in clearance.

The utility model compared with prior art has following good effect:

1, the wireway of variable-diameter structure, simple in structure, make easily;

2, combustion gas and the air that accompanies through compressing repeatedly and spreading, form uniform mist when having the wireway of variable-diameter structure, make burning more abundant;

3, combustion head endoporus flame is protected and led by the uniform little pore combustion flame of periphery, easily forms column flame, reduces thermal loss, improves efficiency of combustion.

Description of drawings

Fig. 1 is the utility model structural representation.

Fig. 2 is the side view of Fig. 1.

The specific embodiment

Below with reference to the accompanying drawings and in conjunction with the embodiments, the utility model is elaborated.

Pre-mixing type combustion apapratus shown in the drawings is applied on the gas-fired infrared radiant tube heating equipment, and it comprises the wireway 1 of tubulose, the combustion head 2 and the screw 3 of flange-like.Described wireway 1 is a more piece reducer pipe structure, and pipe two ends, stage casing connect air inlet and gas outlet respectively by the conical pipe that extends out.Be on the air inlet of lower end and the conical pipe junction outer wall and be arranged with the wide radial slot of 9mm 1.1.Being in the gas outlet of upper end plug adorns combustion head 2 and is radially locked by screw 3.Described combustion head 2 is the main body port with endoporus 2.2, and little pore 2.1 of the uniform Φ 2.0mm of ring endoporus 2.2 one-week interval 4.5mm is formed the auxiliary combustion mouth.Combustion gas is introduced from the air inlet end, the gas-flow that high velocity stream is crossed forms local decompression, inhaled air flows into conical pipe with combustion gas from both sides radial slot 1.1, be compressed and mix after the stage casing pipe is done the diffusion mixing from other end conical pipe, final most of mist flows out from combustion head 2 endoporus 2.2, and remainder is from uniform little pore 2.1 outflows of 2.2 1 weeks of ring endoporus.The mist that flows out once the little pore 2.1 of igniting at first ignites, the mist that the endoporus 2.2 that ignites simultaneously flows out.Flame in the outer flame block of one circle ring endoporus 2.2, thereby the long flame of formation column.

The utility model fully mixes combustion gas and air by more piece lateral cross section sudden change, makes that burning is more abundant, the thermal efficiency is higher, flame is more stable.

Claims

1, a kind of pre-mixing type combustion apapratus, it comprises the wireway (1) of tubulose, the combustion head (2) and the screw (3) of flange-like; It is characterized in that: described wireway (1) is more piece reducer pipe structure, pipe two ends, stage casing connect air inlet and gas outlet respectively by the conical pipe that extends out, and are on the air inlet of lower end and the conical pipe junction outer wall to be symmetrical arranged the wide radial slot of 7～11mm (1.1); Being in the gas outlet of upper end plug adorns combustion head (2) and is radially locked by screw (3); Described combustion head (2) is main port with endoporus (2.2), little pore (2.1) of the uniform Φ 1.5～2.5mm of ring endoporus (2.2) one-week interval 4～6mm.