CN2081035U

CN2081035U - Combined burner with low combustion-gas pressure for industrial boiler

Info

Publication number: CN2081035U
Application number: CN 90203424
Authority: CN
Inventors: 陈祖安; 冯骏
Original assignee: CHEN ZU AN
Current assignee: CHEN ZU AN
Priority date: 1990-03-23
Filing date: 1990-03-23
Publication date: 1991-07-17

Abstract

The utility model discloses a combined burner with low burning-gas pressure for an industrial boiler. More than three injection burners with smaller flow rate and low burning-gas pressure are vertically arranged on one or a plurality of annular pipes for burning-gas distribution or radiated boxes for burning-gas distribution, and can be arbitrarily assembled up into a matched group combined burner according to the boiler capacity. The burner can inject unburned chemical components of a single small burner towards the large flame for removing burnout, which is favorable to reduce the degree of chemical incomplete burn to enhance the thermal efficiency of the boiler. Meanwhile, in the group burner comprising a plurality of or about twenty small burners, complete flameout possibility in the operation is as small as almost zero. Thus, compared with a boiler adopting a single gas-burner, the utility model enhances running safety and reliability.

Description

Combined burner with low combustion-gas pressure for industrial boiler

The utility model belongs to the low gas pressure combination burner of combustion apparatus.

Existing single gas burner, as the low-pressure gas injection burner, (20 meters of big flows ³More than/time) time, its burner oversize, it is complete inadequately to burn, and boiler thermal output is lower, generally requires flame supervision and flame-out protection device.

The purpose of this utility model is the deficiency that is to overcome single gas burner, improves the thermal efficiency of gas fired-boiler and the security reliability of operation.Solve the big oversize difficulty of flow low-pressure fuel gas injection burner preferably, provide the combination gas burner that flame requires occasion to use vertically upward or downwards.

The design specification of this low gas pressure combination burner is: 1. the gaseous-pressure before the burner is 300 during boiler operatiopn ^{+ 50}MmH ₂O; 2. the design's gas flow is 60 meters ³In/time, can be arbitrarily made with range of flow is 12～120 meters ³The time; 3. boiler adapted blower fan not; 4. flame diameter should adapt with flue and be longer, makes flame good to the degree of filling of combustion chamber; 5. completing combustion to greatest extent and safety, reliability should be arranged; And to the boiler of different capabilities, its burner can combine arbitrarily, need not redesign.The combustion gas of this torch is meant coal gas, natural gas or oil gas.

Requirement according to above-mentioned purpose and design specification, new-type structural design and technical measures that the utility model adopts are as follows: 1, burner design is burnt combination burner by synthesizing a group than big flow than the little sets of burners of low gas pressure injection type of low discharge more than 3, the gas flow of the little burner of each injection type is the modulus of the required gas quantity of each capacity boiler of design discharge scope.This combination burner just can random set synthesize the burner of required gas quantity of different capabilities boiler and flame diameter, and the size of burner and boiler furnace are complementary, and can burn low-pressure fuel gas, does not need blower fan.Burn different in the stove internal combustion in groups with single burner by several little sets of burners, just variant in the size of flame and the temperature field in furnace degree that is evenly distributed, the gas flame that also is each little burner is to spray to one than its much bigger flame group, the imperfect combustion combustible of little burner ejection is burnouted in big flame group, thereby can greatly improve the discharge quality of flue gas; 2, the little burner vertically-arranged of each injection type is distributed on the ring pipe 1 or several combustion gas, or vertically-arranged distributes on the radiation case 1 combustion gas.Select the annular tube type gas distributor for use, its benefit is that two rings can use simultaneously, also can only use any, so the adjusting of combination burner ratio increased, but deficiency is to have 2～3 little burnings to chew when extinguishing in one group of burner, need manually go to ignite again; Select the box burner distributor of radiation for use, and make the burner of central authorities circles and banj keep the distance that suits mutually, one of them is lighted, then wherein burner can both ignite automatically.Because boiler is in service when several burner combustions, the burner of burning can not extinguish entirely, so do not need to settle flame-out protection device.In addition, the windward side of each the little burner on the box gas distributor of radiation arranges than second ring circle, because the windward side of the inner ring of second ring circle is blocked to some extent by the outer ring.

With two embodiment, in conjunction with the accompanying drawings, structure of the present utility model is described as follows below:

Fig. 1 is the plane that Industrial Boiler is arranged with the second ring pipe of low gas pressure combination burner.

Fig. 2 is the A-A cutaway view that Industrial Boiler is arranged with the second ring pipe of low gas pressure combination burner.

Fig. 3 is the plane of Industrial Boiler with the box layout of radiation of low gas pressure combination burner.

Fig. 4 is the elevation of Industrial Boiler with the box layout of radiation of low gas pressure combination burner.

First embodiment of the present utility model, as shown in Figure 1, 2, it is made up of little burner of injection type and gas distributor, the little burner of the injection type of present embodiment has 15, gas distributor has two, wherein 6 little burner vertically-arrangeds are distributed on the interior ring pipe (4), and 9 little burner vertically-arrangeds are distributed on the outer ring pipe (4) in addition.The little burner of described injection type, as shown in Figure 2, it is a little burner of low gas pressure injection type than low discharge, its nozzle (3) is a round tube, the lower end vertically-arranged distributes on the top-portion apertures of ring pipe (4) and is tightly connected in combustion gas, the upper end is stretched into the lower end of mixing tube (1) and is formed a wind suction inlet (7), and 60～70% air quantity is provided; Mixing tube (1) on nozzle (3) top is an inferior pyramidal, goes up little expansion, and the toroidal gas mixing tube of top reducing fully mixes the combustion gas that nozzle (3) sprays into a wind suction inlet (7) inhaled air at this; At the outer secondary wind suction line (2) of mixing tube (1) epimere circle is a circular suction line of slightly receiving suitable for reading, and it is outer and keep certain interval to be enclosed within mixing tube (1).The little cylindrical in nose circle and mixing tube middle part forms secondary wind suction inlet (8) down.And transfer air quantity with the accent blast cap (5) that is rotated with on the cylindrical.Described gas distributor is an inside and outside annular pipe (4) of equidistant placement with flat, its lower end is fixing with three uniform support plates (6), the upper end has uniform hole to be connected with the lower end of nozzle (3), inside and outside annular pipe right part air inlet enters pipe (9,10) with combustion gas respectively and is connected, and is connected with outer valve control combustion gas house steward thus.This embodiment is by 60 meters of boiler gas flows ³The design of/time, the little burner quantity and the ring pipe number of other combination burners should be done corresponding increase and decrease with boiler capacity, but minimum little burner is 3, and ring pipe is 1, and in addition, ring pipe can be made ring shape, also can make polygon.

Second embodiment of the present utility model, shown in Fig. 3,4,15 little burners of injection type (1,2,3,5) are that vertically-arranged is distributed on the box gas distributor of radiation, central authorities' circle is gone up and is arranged 5 burners, arrange 2 burners on 5 banjs respectively, and the spacing between them can be reached as long as one of them is lighted, then can both ignite automatically, and the burner on 5 banjs also can be ignited automatically thus along 5 burners of hoop.The structure that the little burner of described injection type is identical with having of first embodiment does not repeat at this.The box gas distributor of described radiation (11), shown in Fig. 3,4, it is an annular gas distributor with 5 uniform banjs, and the middle part, lower end of central annulus is fuel gas inlet pipe (9), and the upper end has nozzle (3) lower end of the suitable Kong Yuxiao burner that all distributes to be tightly connected.

Press the structure and the distribution form of the foregoing description, and the structure principle of Combination Design of the present utility model and measure, designed combination burner can burn low-pressure fuel gas (300 without blower fan ^{+ 50}MmH ₂O) work, and can be 12～120 meters of gas flows ³Press boiler capacity combination burner arbitrarily in/time, flame diameter and flue adapt and are longer, and good to the degree of filling of combustion chamber, and fuel gas buring is complete, and is safe and reliable, the thermal efficiency height of boiler (being about 90%).Fume emission and noise reach state-set standard.

Claims

1, a kind of Industrial Boiler low gas pressure combination burner, it is made up of the little burner and the bottom gas distributor of top vertically-arranged, described little burner is the low gas pressure injection burner than low discharge, the lower end of lower nozzle (3) is connected with ring pipe or the box distributor of radiation (4 or 11) upper end, the upper end is stretched in mixing tube (1) lower end and is formed a wind suction inlet (7), the secondary wind suction line (2) of mixing tube (1) top overcoat keeps certain interval with mixing tube, lower end and mixing tube cylindrical form secondary wind suction inlet (8), it is characterized in that combination burner, be by more than 3 than the low gas pressure injection burner of low discharge, vertically-arranged distributes on the ring pipe 1 or several combustion gas, the group who forms big gas flow burns combination burner, this burner is used for low gas pressure steam (hot water) boiler, and can be arbitrarily made with the combination burner that is complementary by boiler capacity, described low gas pressure injection burner, its nozzle (3) is a round tube, the lower end vertically-arranged distributes on the top-portion apertures of ring pipe (4) and is tightly connected in combustion gas, the upper end is stretched into the lower end of mixing tube (1) and is formed a wind suction inlet (7), and 60～70% air quantity is provided; Mixing tube (1) on nozzle (3) top is an inferior pyramidal, goes up little expansion, and the toroidal gas mixing tube of top reducing fully mixes the combustion gas that nozzle (3) sprays into a wind suction inlet (7) inhaled air at this; Secondary wind suction line (2) outside mixing tube (1) epimere circle is a circular suction line of slightly receiving suitable for reading, it is outer and keep certain interval to be enclosed within mixing tube (1), the little cylindrical in nose circle and mixing tube middle part forms secondary wind suction inlet (8) down, and transfers air quantity with the accent blast cap (5) that is rotated with on the cylindrical.

2, low gas pressure combination burner as claimed in claim 1, it is characterized in that gas distributor is isoplanar equidistant two circular gas distribution pipes (4), an or radiation combustion gas distributor box (11), there are the uniform hole that reaches the distance of igniting automatically and nozzle (3) lower end of burner to be tightly connected above it, and are connected with outside combustion gas house steward with fuel gas inlet.