CN202835356U

CN202835356U - Semi-jet type nozzle

Info

Publication number: CN202835356U
Application number: CN201220391234XU
Authority: CN
Inventors: 王斌; 徐伟栋; 刘慧�
Original assignee: CHANGZHOU ENN GAS ENGINEERING Co Ltd
Current assignee: CHANGZHOU ENN GAS ENGINEERING Co Ltd
Priority date: 2012-08-08
Filing date: 2012-08-08
Publication date: 2013-03-27
Anticipated expiration: 2022-08-08

Abstract

The utility model discloses a semi-jet type nozzle. The semi-jet type nozzle comprises an air tube and a low voltage natural gas pipe, wherein a natural gas distributor is fixed at the front end of the low voltage natural gas pipe; the rear end of the low voltage natural gas pipe extends out of the air tube; the front end of the air tube is connected with a mixed chamber cover for covering the natural gas distributor; a mixed gas pipe penetrates into the low voltage natural gas pipe; a gas outlet end of the mixed gas pipe is positioned on one side of the natural gas distributor; the rear end of the low voltage natural gas pipe is provided with a nozzle capable of spraying middle pressure natural gas and injecting air; and a mixed chamber capable of mixing the middle pressure natural gas and the air and spraying the mixed gas into the mixed gas pipe is formed between the nozzle and the mixed gas pipe. According to the utility model, through combination of common vortex mixing of the low pressure natural gas and the air as well as spraying and combustion of the middle pressure natural gas and through the adoption of a method of preheating secondary air, carbon particles are separated out from partial hydrocarbons in the mixed gas of the low pressure natural gas and the air before cracking by using high temperature flame obtained by combustion of the middle pressure natural gas, as a result, bright flames can be obtained; and the length of a main flame is also lengthened.

Description

Half injecting type burner

Technical field

The utility model relates to and a kind ofly prolongs the length of flame and brightness has specific (special) requirements to flame half used injecting type burner of industrial heating furnace.

Background technology

In industrial heating furnace, often because technological requirement, flame brightness and the length of jet combustion there is certain requirement, water-gas commonly used was as the burning source of the gas of nozzle in the past.And along with the use of natural gas, in view of natural gas clean environment firendly and price advantage, natural gas just is used widely as the burning source of the gas.If but only rely on low pressure natural gas for jet combustion, then can't reach the purpose that prolongs the length of flame, improves flame brightness, and adopt the mesohigh natural gas can cause cost to rise, therefore must select suitable nozzle structure, rationally utilize the mesolow natural gas, both satisfy instructions for use, and can not cause again the significantly rising of cost.

The utility model content

The technical problems to be solved in the utility model is: overcome the deficiency in the prior art, a kind of half injecting type burner is provided, mix the mode that combines with middle pressure natural gas injection burning by low pressure natural gas and the common eddy flow of air, prolong the length of flame that sprays in the burner, improve flame brightness.

The technical scheme that its technical problem that solves the utility model adopts is: a kind of half injecting type burner, comprise airduct, be located in the low pressure natural gas pipe in the airduct, low pressure natural gas pipe front end is fixed with the natural gas distributor with spray-hole, stretch out outside the airduct low pressure natural gas pipe rear end, the airduct front end is connected with the hybrid chamber cover that covers natural gas distributor, be equipped with mixture pipe in the described low pressure natural gas pipe, the outlet side of mixture pipe is positioned at natural gas distributor one side, press during low pressure natural gas pipe rear end is provided with and can sprays natural gas and simultaneously injection enter the nozzle of air, be provided with the mixing chamber that middle pressure natural gas can be mixed and spurts into mixture pipe with air between nozzle and the mixture pipe.

Between described airduct inwall and the low pressure natural gas pipe outer wall and nearly natural gas distributor place is provided with water conservancy diversion wind dish.

Described mixing chamber is fixed on the low pressure natural gas inside pipe wall, mixing chamber has the ejection cavity of cone segments, the hybrid chamber of stretched section and the diffusion chamber that cone is forged, the large end of ejection cavity is towards nozzle, the large end of diffusion chamber is towards mixture pipe, and the small end of ejection cavity links to each other with the hybrid chamber two ends respectively with the small end of diffusion chamber.

Described nozzle is arranged on the low pressure natural gas inside pipe wall, nozzle comprises the fixed disk fixing with the low pressure natural gas inside pipe wall, the fixed disk center is provided with the nozzle body that emission direction is aimed at ejection cavity, but circumferentially offers respectively the through hole that injection enters outside air around nozzle body on the fixed disk.

Be connected with the air blast pipe on the described airduct sidewall, be connected with low-pressure inlet pipe on the sidewall of low pressure natural gas pipe.

The beneficial effects of the utility model are: the utility model adopts low pressure natural gas and the common eddy flow of air to mix with middle pressure natural gas injection burning and combines, form by the preheating Secondary Air, hydrocarbon partial in the gaseous mixture that the thermal-flame that middle pressure combustion of natural gas forms mixes low pressure natural gas and air is separated out carbon granules and is obtained luminous flame before cracking, also elongate the length of main flame, satisfied the instructions for use that to flame brightness has the industrial heating furnace of specific (special) requirements.

Description of drawings

Below in conjunction with drawings and embodiments the utility model is further specified.

Fig. 1 is structural representation of the present utility model.

1. airducts, 2. low pressure natural gas pipes, 3. natural gas distributors, 31. spray-holes, 4. hybrid chamber covers, 5. mixture pipes, 6. nozzles, 61. fixed disks, 62. nozzle bodies, 63. through holes, 7. mixing chambers, 71. ejection cavities, 72. hybrid chambers, 73. diffusion chambers, 8. water conservancy diversion wind dishes, 9. air intake ducts, 10. low-pressure inlet pipe among the figure

The specific embodiment

By reference to the accompanying drawings the utility model is further described now.The schematic diagram that these accompanying drawings are simplification only illustrates basic structure of the present utility model in a schematic way, so it only shows the formation relevant with the utility model.

A kind of half injecting type burner as shown in Figure 1, being applicable to flame brightness has the industrial heating furnace of specific (special) requirements, comprise airduct 1, be located in the low pressure natural gas pipe 2 in the airduct 1, be connected with air blast pipe 9 on airduct 1 sidewall, be connected with low-pressure inlet pipe 10 on the sidewall of low pressure natural gas pipe 2.Low pressure natural gas pipe 2 front ends are fixed with the natural gas distributor 3 with spray-hole 31, stretch out outside the airduct 1 low pressure natural gas pipe 2 rear ends, between airduct 1 inwall and low pressure natural gas pipe 2 outer walls and nearly natural gas distributor 3 places are provided with the water conservancy diversion wind dish 8 that can change wind direction, accelerate wind-force, and airduct 1 front end is connected with the hybrid chamber cover 4 that cover cap is lived natural gas distributor 3.

Be equipped with mixture pipe 5 in the described low pressure natural gas pipe 2, the outlet side of mixture pipe 5 passes natural gas distributor 3 and end face flushes with the outer face of hybrid chamber cover 4, press during low pressure natural gas pipe 2 rear ends are provided with and can spray natural gas and simultaneously injection enter the nozzle 6 of air, be provided with the mixing chamber 7 that middle pressure natural gas can be mixed and spurts into mixture pipe 5 with air between nozzle 6 and the mixture pipe 5.

Specifically, described mixing chamber 7 is fixed on low pressure natural gas pipe 2 inwalls, mixing chamber 7 has the ejection cavity 71 of cone segments, the hybrid chamber 72 of stretched section and the diffusion chamber 73 that cone is forged, the large end of ejection cavity 71 is towards nozzle 6, the large end of diffusion chamber 73 is towards mixture pipe 5, and the small end of the small end of ejection cavity 71 and diffusion chamber 73 links to each other with hybrid chamber 72 two ends respectively.

Described nozzle 6 is arranged on low pressure natural gas pipe 2 inwalls, nozzle 6 comprises the fixed disk 61 fixing with low pressure natural gas pipe 2 inwalls, fixed disk 61 centers are provided with the nozzle body 62 that emission direction is aimed at ejection cavity 71, but circumferentially offer respectively the through hole 63 that injection enters outside air around nozzle body 62 on the fixed disk 61.

During use, middle pressure natural gas is by at a high speed ejection of nozzle body 62, and the through hole 63 injection air on fixed head 61 utilize venturi principle, after middle pressure natural gas and air mix in mixing chamber 7, along mixture pipe 5 ejections; Low pressure natural gas by low-pressure inlet pipe 10 enter low pressure natural gas pipe 2 interior after, spray-hole 31 from natural gas distributor 3 sprays, the air that enters airduct 2 from air blast pipe 9 is after 8 break-ins of water conservancy diversion wind dish are accelerated, with the low pressure natural gas mixed combustion of spray-hole 31 ejections on the natural gas distributor 3.In said process, from nozzle body 62 at a high speed ejection by the thermal-flame that forms of pressure combustion of natural gas, with the low pressure natural gas of ejection on the natural gas distributor 3 and the part methane cracking in the gaseous mixture that mixes of the air in the airduct 2, separate out carbon granules and obtain luminous flame, also elongated the length of main flame, reach the combustion efficiency that substitutes former water-gas burner, satisfied the instructions for use that to flame brightness has the industrial heating furnace of specific (special) requirements.

Above-mentioned embodiment only is explanation technical conceive of the present utility model and characteristics; its purpose is to allow the personage that is familiar with technique can understand content of the present utility model and is implemented; can not limit protection domain of the present utility model with this; all equivalences of doing according to the utility model Spirit Essence change or modify, and all should be encompassed in the protection domain of the present utility model.

Claims

1. one and half injecting type burners, comprise airduct (1), be located in the low pressure natural gas pipe (2) in the airduct (1), low pressure natural gas pipe (2) front end is fixed with the have spray-hole natural gas distributor (3) of (31), stretch out outside the airduct (1) low pressure natural gas pipe (2) rear end, airduct (1) front end is connected with the hybrid chamber cover (4) that covers natural gas distributor (3), it is characterized in that: be equipped with mixture pipe (5) in the described low pressure natural gas pipe (2), the outlet side of mixture pipe (5) is positioned at natural gas distributor (3) one sides, press during low pressure natural gas pipe (2) rear end is provided with and can sprays natural gas and simultaneously injection enter the nozzle (6) of air, be provided with the mixing chamber (7) that middle pressure natural gas can be mixed and spurts into mixture pipe (5) with air between nozzle (6) and the mixture pipe (5).

2. half injecting type burner according to claim 1 is characterized in that: between described airduct (1) inwall and low pressure natural gas pipe (2) outer wall and nearly natural gas distributor (3) locate to be provided with water conservancy diversion wind dish (8).

3. half injecting type burner according to claim 1, it is characterized in that: described mixing chamber (7) is fixed on low pressure natural gas pipe (2) inwall, mixing chamber (7) has the ejection cavity (71) of cone segments, the hybrid chamber (72) of stretched section and the diffusion chamber (73) that cone is forged, the large end of ejection cavity (71) is towards nozzle (6), the large end of diffusion chamber (73) is towards mixture pipe (5), and the small end of the small end of ejection cavity (71) and diffusion chamber (73) links to each other with hybrid chamber (72) two ends respectively.

4. half injecting type burner according to claim 3, it is characterized in that: described nozzle (6) is arranged on low pressure natural gas pipe (2) inwall, nozzle (6) comprises the fixed disk (61) fixing with low pressure natural gas pipe (2) inwall, fixed disk (61) center is provided with the nozzle body (62) that emission direction is aimed at ejection cavity (71), and fixed disk (61) upward centers on nozzle body (62) but circumferentially offers respectively the through hole (63) that injection enters outside air.

5. half injecting type burner according to claim 1 is characterized in that: be connected with air blast pipe (9) on described airduct (1) sidewall, be connected with low-pressure inlet pipe (10) on the sidewall of low pressure natural gas pipe (2).