CN206347566U - Burner with inferior speed device - Google Patents

Abstract

The utility model discloses a kind of burner with inferior speed device, including burner body, hot-air channel and gas passage are provided with burner body, hot-air channel, gas passage are connected by being arranged at the hot air inlet on burner body top, gas entry with heated air source, coal gas source respectively, the lower end of burner body sets combuster, combustion chamber is disposed with mixed zone, recirculating zone, accelerating region and outlet, mixed zone and is provided with igniter from top to bottom.The utility model Asia, which has, shortens the heat time, reduces exhaust gas temperature, reduces flue gas loss, improves in-furnace temperature uniformity, shortens the advantage of equal temperature time.It inhales in the volume for the red-hot air-flow of high speed that burner with inferior speed sprays and under stirring action, reaches that the temperature difference can be down to≤20 DEG C in optimum state, bag, so as to shorten baking time, improve productivity ratio, while saving energy consumption.

Description

Burner with inferior speed device

Technical field

The utility model is related to industrial furnace technology field, in particular to a kind of burner with inferior speed device.

Background technology

The performance of industrial furnace apparatus for baking has very big to tapping temperature, steelmaking operations rate, furnace life of large-scale steel mill etc. Influence.Ladle baking is between steel-making and the main production process of continuous casting two, and the height of baking temperature of steel ladle is overall to coordinating Production plays an important role, and the meaning to continuous casting is more great.

Two conditions of usual flame stabilization burning：One kind is to meet combust mixed gas air-fuel ratio, reflects bar in chemistry In the range of part, one kind is that burning mixture speed is equal with combustion reaction products speed, burning mixture speed>Burning is anti- Product rates are answered, are commonly called as：Fire is taken off, puts out, lift flame.It is on the contrary：Burning mixture speed<Combustion reaction products speed, is commonly called as：Return Fire,

For burner, not only to ensure that fuel can smoothly catch fire, but also require to form stable after catching fire Flame, occur without from flame, put out, de- fire, tempering the problems such as so that with stable combustion process.If the burning after catching fire Flame is off and on, then the burner does not just possess practical value, therefore, how to ensure that flame can be stablized in a certain position Put, enable the fuel continued stable combustion that has caught fire without extinguishing, be in combustion technology one it is very crucial the problem of, be also combustion One more complicated and particularly important problem of burning technology research.

The content of the invention

The purpose of this utility model is low for traditional burner flame speed, and based on radiation heat transfer, heat convection is extremely low The problem of drawback, strengthens the burner with inferior speed device that convection current is remodeled there is provided a kind of.

To achieve the above object, the burner with inferior speed device designed by the utility model, including burner body, the burner Hot-air channel and gas passage are provided with body, the hot-air channel, gas passage are respectively by being arranged at burner sheet Hot air inlet, the gas entry on body top are connected with heated air source, coal gas source, and the lower end of the burner body is provided with burning Room, it is characterized in that, the combustion chamber is disposed with mixed zone, recirculating zone, accelerating region and spout from top to bottom, described Igniter is provided with mixed zone.

Further, the mixed zone, recirculating zone, accelerating region and spout are arranged step by step in convergence shape so that combustion gas and sky Gas more fully can be mixed and accelerated, so as to improve ignition success rate and efficiency of combustion, prevent detonation and safety is raw Hidden danger is produced, production cost is saved.

Further, the burner body lower end gas passage exit is provided with cloth hole baffle plate, and cloth hole baffle plate is by sky Gas and combustion gas are divided into tiny multi beam air-flow, so as to be more fully mixed.

Further, the burner body lower end hot-air channel exit is provided with air adjustment plate, the regulation Plate obliquely arranges that mixed gas, which is ejected on inclined-plane, to be shot back, and forms recirculating zone so that burning is more stable and fills Point, export acceleration of being pressurizeed to it while shrinking

Further, the surrounding of mixed zone in the combustion chamber, recirculating zone, accelerating region and spout is filled out by fire clay Fill, spout flame temperature can reach 1400 DEG C, and general material resistance to elevated temperatures is without so good, it is necessary to which often replacing, causes dimension Protect cost too high, it is good to fill high temperature resistant property using fire clay, indeformable and cost is low.

The utility model burner with inferior speed device, with the heat time is shortened, reduces exhaust gas temperature, reduces flue gas loss, In-furnace temperature uniformity is improved, shortens the advantage of equal temperature time.The volume for the red-hot air-flow of high speed that it sprays in burner with inferior speed is inhaled Under stirring action, reach that the temperature difference can be down to≤20 DEG C in optimum state, bag, so as to shorten baking time, improve production Rate, while saving energy consumption.

Brief description of the drawings

Fig. 1 is the utility model structural representation；

Fig. 2 is enlarged drawing at I in Fig. 1；

In figure：Burner body 1, hot air inlet 2, gas entry 3, combustion chamber 4, mixed zone 4.1, recirculating zone 4.2 accelerates Area 4.3, outlet 4.4, igniter 5, cloth hole baffle plate 6, hot-air channel 7, gas passage 8, air adjustment plate 9, fire clay 10, Bell body 11.

Embodiment

The utility model is described in further detail below in conjunction with the drawings and specific embodiments.

As depicted in figs. 1 and 2, in a kind of burner with inferior speed device of the utility model, including burner body 1, burner body 1 Hot-air channel 7 and gas passage 8 are provided with, hot-air channel 7, gas passage 8 are respectively by being arranged at the top of burner body 1 Hot air inlet 2, gas entry 3 connects with heated air source, coal gas source.The exit of gas passage 8 is provided with cloth hole baffle plate 6, The exit of hot-air channel 7 is provided with air adjustment plate 9.Air adjustment plate 9 is obliquely arranged.

The lower end of burner body 1 sets combuster 4.The lower end of combustion chamber 4 is stretched into bell body 11.Combustion chamber 4 from Mixed zone 4.1, recirculating zone 4.2, accelerating region 4.3 and outlet 4.4 are up to disposed with down.Mixed zone 4.1, recirculating zone 4.2, plus Fast area 4.3 and outlet 4.4 are arranged step by step in convergence shape.Mixed zone 4.1, recirculating zone 4.2, accelerating region 4.3 and the surrounding for exporting 4.4 Filled by fire clay 10.Igniter 5 is provided with mixed zone 4.1.

Burner with inferior speed itself is with a combustion chamber 4, after the fuel of burner body 1 is mixed with air, in combustion chamber 4 Burning (more than 85%) completely is substantially carried out, high-temperature fuel gas is from 4.4 bulbs of pressure of convergence outlet to spray at a high speed, and its speed is 90-120m/s, reaches as high as 300m/s, and general only several meter per seconds of burner spouting velocity are to tens meter per seconds.It is reachable due to burning 300m/s, volumetric heat intensity is up to 6.28 × 108KJ/ (m3h).

Burner with inferior speed shows following aspect to energy-saving effect：

1) reinforcing convection current is remodeled, and shortens the heat time, and traditional Baking out lid burner flame speed is very low, is changed with flame Based on heat, because flame speed is low, combustion product is laminar flow being heated the flowing on surface, and its convection current hot coefficient of remodeling is：H= NU λ/d, wherein nusselt number NU=0.332Pr1/3Pe1/2.And high velocity burner to heated object surface flow with disorderly Based on stream, NU=Pr1/2 (0.036Re0.8-836) in the coefficient of heat transfer is if with certain identical heating bag chamber size, combustion product temperature Spend for 1790 DEG C, 900 DEG C of heated object temperature uses general burner (muzzle velocity is 5m/s) and high combustion rate burner (to take 150m/ S), then it is the former 4 times that can estimate heat convection heattransfer rate, because the quantity of heat convection is increased, reduces exhaust gas temperature, reduces Flue gas loses.

2) in-furnace temperature uniformity is improved, shortens equal temperature time, it is due to that the high speed that burner with inferior speed sprays is red-hot The volume of air-flow is inhaled and stirring action, under optimum state, and the temperature difference can be down to≤20 DEG C in bag, so as to shorten baking time, improves Productivity ratio, while saving energy consumption.

3) air is preheated using flue gas, after combustion air normal temperature supply burner, is being surrounded on the ring of nozzle periphery In the bag sucked inside gap preheater with injector, flue gas is preheated after carrying out heat exchange, what preheated air was supplied with nozzle again Fuel mixing, burning, with the sub- flame sprayed at a high speed, air preheat can be reached 350~400 by general ladle at 1000 DEG C DEG C, it can save energy more than 15%.General air preheating temperature often improves 100 DEG C, capable of saving fuel about 5%.

4) using sub- high speed nozzle convergence structure, stable burning under sub- high-velocity combustion state is reached, in sub- injection gas at a high speed Under stream effect, peripheral gas flow, which can be presented, is provided with strong chemical reaction (i.e. no combustion process) in one recirculating zone, recirculating zone, Combustion reaction products almost burning completely, high temperature, that composition is homogeneous are wherein only filled with, it is reverse spout week that it, which is flowed to, Enclose, and be brought into by turbulent diffusion in the primary air of fresh combustion mixture.It is this to backflow and brought into newly by turbulent diffusion The high-temp combustion reaction product of fresh combustion mixture can play a part of a fixed continuity point burning things which may cause a fire disaster, so as to play stable fire The effect of flame.

Current coke-stove gas price is about 54 yuan/GJ, according to every cubic metre of about 0.98 yuan of coke-stove gas price of calculating.With Singly bag toasts coal gas average discharge 500m before new technology³/ h, uses coal gas average discharge 250m after new technology³/ h, it is contemplated that save coal Gas consumption 50%, under continuous duty, was toasted by daily 18 hours, and insulation in 6 hours is calculated.Energy is saved in single bag steel-making daily About 4410 yuan of source expense.Create direct economic benefit：4410*365=160.965 ten thousand yuan

Although being described in conjunction with the accompanying embodiment of the present utility model, for the technology people of the art For member, on the premise of the utility model is not departed from, some deformations can also be done, replaces and improves, these are also considered as belonging to Protection domain of the present utility model.

Claims (6)

1. it is provided with hot-air channel (7) in a kind of burner with inferior speed device, including burner body (1), the burner body (1) With gas passage (8), the hot-air channel (7), gas passage (8) are respectively by being arranged at the heat on burner body (1) top Air intake (2), gas entry (3) are connected with heated air source, coal gas source, and the lower end of the burner body (1) is provided with burning Room (4), it is characterised in that：The combustion chamber (4) is disposed with mixed zone (4.1), recirculating zone (4.2), acceleration from top to bottom Igniter (5) is provided with area (4.3) and spout (4.4), the mixed zone (4.1).

2. burner with inferior speed device according to claim 1, it is characterised in that：The mixed zone (4.1), recirculating zone (4.2), accelerating region (4.3) and spout (4.4) are arranged step by step in convergence shape.

3. the burner with inferior speed device according to claims 1 or 2, it is characterised in that：Burner body (1) lower end coal Gas passage (8) exit is provided with cloth hole baffle plate (6).

4. burner with inferior speed device according to claim 3, it is characterised in that：Burner body (1) lower end hot-air Passage (7) exit is provided with air adjustment plate (9).

5. burner with inferior speed device according to claim 4, it is characterised in that：The air adjustment plate (9) is oblique Arrangement.

6. burner with inferior speed device according to claim 1, it is characterised in that：The interior mixed zone of the combustion chamber (4) (4.1), the surrounding of recirculating zone (4.2), accelerating region (4.3) and spout (4.4) is filled by fire clay (10).