MXPA00004910A - Ceramic burner for gases and regenerative heat generator provided with the said burner - Google Patents

Abstract

Ceramic burner for gases, especially for use in the combustion chamber (2) of a regenerative heat generator, such as a hot-blast stove (1) for a blast furnace (1), which ceramic burner is provided with a first feed duct (13) for a first combustion component, such as a combustible gas, and with a second feed duct (12) for a second combustion component, such as combustion air, the first feed duct (13) opening out into a substantially elongate outlet opening (15) and the second feed duct opening out into at least one second outlet opening (14), the latter opening(s) extending essentially parallel to and downstream of the first outlet opening, a partition (11), which continues as far as the two outlet openings (14, 15), furthermore being situated between the first feed duct (13) and the second feed duct (12), in which ceramic burner at least one of the first and second feed ducts (12, 13) is provided with means for imparting turbulence, during operation, to the combustion component emerging through the duct(s) in question, which turbulence is such that a combustible mixture of the two combustion components is formed upstream of the end of the partition (11).

Description

CERAMIC GAS BURNER AND REGENERATION HEAT GENERATOR PROVIDED WITH SUCH MACHINE DESCRIPTION OF THE INVENTION The invention relates to a ceramic gas grinder, especially for use in the combustion chamber of a regeneration heat generator, such as a heat recuperator for a blast furnace, whose ceramic burner ica is provided with a first feed pipe for a first combustion component, < -as a combustible gas, and with a feeding tube for a second co-leader < In combustion such as casting air, the first supply duct opens towards a substantially disengaged exit opening and the second supply duct opens at least one second exit opening, the last opening it extends essentially parallel to and downstream of the first opening and outlet, a division, which continues up to the two outlet openings, whose outlet openings are adhered directly to the combustion chamber further being located between the first "feed" duct the second feeding duct. The invention is also related to a regeneration heat generator pro-ced with a ceramic mill of this nature. When a blast furnace is operated, a plurality of heat recuperators are grouped near this blast furnace, resulting in the exchange of one heat recuperator to another, which means that it is always possible to feed the blast furnace, for example. from a discharge port to a heated heat recuperator, with hot air as a reaction component. When a recuperator or heat ~ disconnects from a high , or:? o, can be reheated by means of gas from the cor. the burner of the ceramic burner, in which the hot combustion gas flows through the combustion chamber and the heat retention ee absorbs the heat of the combustion gas -Insure, so that this heat can then be requested once more, in a subsequent operation phase, for the air c:, when it is fed to the heat recuperator by means of the supply port. For the good of the efficiency of the installation, it is very important that the combustion components fed to the ceramic burner be burned as completely as possible before the hot combustion gas flows through the caloi intent cell. . For this reason,] i? s structures have been taught for the ceramic meter. In the roving frame of the aforementioned known type, embodiments are known in which a single feed pipe is provided for the combustion gas and a feed pipe for the combustion air. Designs are also known in which a duct for the fuel gas is centrally located between years of power for the combustion area. There are also known designs in which the safe operation of a pipeline for CGT air supply or use includes an opening, centers that change the division of this heat distribution in a given hole. . The latest design is described, or -Example in the European patent EP 0, 090, 096. Although known designs have already allowed me to achieve considerable improvements in combustion efficiency, it has been found that, without moo-jo, in further improvements are still feasible. In particular, it has been found that it is very important to keep the ignition of the flame as close as possible to the wind above me all the time. This is because if this ignition is carried out at a higher altitude, as a result of a thorough mixing of the combustion components, it is possible that the combustion site will start to fluctuate considerably, leading to the pulsation of the flame. which can cause vibration in the installation in its entirety. Therefore, the object of the invention is to provide features that cause the combustion to take place virtual, constant, and preferably very close to the openings of A solution has now been found which can be used in designs with one / two ducts "A power for the combustion co-following and also for designs in which the c. The outlet opening of each feeding duct is a single outlet or is divided into separate holes.The purpose is to ensure that at least one of the first and second ducts of supply are provided with means for imparting turbulence, during the operation, to the combustion component as it emerges through the ducts in question, whose turbulence: - such that a fuel mixture e the two components combustion forms upstream and adjoins e to the extreme d- division. that this turbulence can occur even if the means comprise a gradual widening, which accommodates near the exit openings of at least the first second food pipeline, of the cross section of the pipeline in question, so that the gradual widening is promoted by the configuration of the division so that the gradual grading is followed to the extreme It divides, through a gradual ensnability, as a result of its being a chamber of urbulence. In the place where the aorupting sanctions take place, the turbulence will be • The combustion element flowing through this expansion in the additional space created, whose turollence also drags the other combustion component, resulting in a combustible mixture forming in the turbulence.This ominable mixture can be ignited immediately. in < => same place, due to the fact that there is a low eloquence of flow in the turbulence in the longitudinal direction of the combustion chamber, resulting in a flame that can not be quickly "blown away". Of course, the abrupt widening should be wide enough to ensure sufficient strength, and it has been found that good results are obtained if the cutting is 1 to 20 to 35% of the cut. cross origin of the method in question. It has been found that not only the steps of the gradual widening which -tributes ai e > of the new design, but also better results if the fifteen - . 15 -isancharaient: gradual is followed, has the fi The division, through a gradual widening, resulted in the formation of a Chamber of I-Dulence. Due to the gradual widening, the | amara of turbulence acquires a volu sufficient to impart turbulence to a larger amount of gas and therefore to mix it and form a fuel mixture. This? D? C? Onal? Ent ° ensures the stability of the rorroación of f _ a ma just above the end of the di ission.

In the? E 2 700 786, a gas burner and chamber are written in a gas mixing chamber. -moustible _ air which is. located air stream of the combustion chamber and separated from the medianterpa by a channel with a restricted transverse cut.In the sealed chamber, the combustion of the mixture is done by means of this cross-sectional cut. Since. < = • n the current ceramic burner of the present invention the gas and air outlet openings are opened directly in the combustion can and The means for imparting turbidity form a combustible mixture, current, and adjacent to the ina. of the cision, the waxing of the fuel mixture from "ales mea ios." EP 0 590 096 describes a cigarette lighter -It was a mica in which the outlets for > 3 '- air has been configured to be able to create "ulence starting from the openings to the combustion chamber, no means of separation, such as a gradual widening It has been described to be able to create turbulence and / or air and gas mixture running above the openings and adjacent to the end of the division. In US Pat. No. 3,837,893 the prior art of the ceramics engineers has been described on which the present invention constitutes an improvement. In addition to the described ceramic burner, the invention is also related to a generator d heat of regeneration, such as a heat recuperator for a blast furnace, which is provided '- ~ > n. No supply port to supply gas to the ^ r rale n taoo and a discharge port to discharge heated gas, comprising a chamber KD of combustion and a shaft of retention and heat, the combustion chamber, to be able to heat the heater of heat, is provided with a ceramica noch ro, the ceramic burner is of the 'roo described earlier. 1 The introduction will be explained in more detail .- of the nte making reference to three figures, in ias . uaies: Figure 1 shows as an example of a heat regenerating heat exchanger, or heat recovery 20 for a blast furnace; Figure 2 shows a detail II of Fiura 1 on an enlarged scale; Figure 3 shows another modality of this size.

In Figure 1, the number 1 d reference i'id.ca a heat generator n the -orna of a recuperator to Q heat for a blast furnace. The recuperator i < - > The heat comprises a heat pump 2 and a heat retention valve 3, the windows are repaired one from the other by a wall 4. A ceramic burner 5 is located in the back of the combustion chamber. The combustion air for the ceramic burner is delivered through the port or connection, and the [Fuel in the form of a fuel is supplied through port 7 of connection. The combustion air and combustion gas nozzle burns in the combustion chamber 2, the exhaust gases emanating from the combustion rise. n stop in the combustion chamber 2, - ^ 3 ^ _ a n by the furnace of the anille 8, and then r tsan through the axis 3 of heat retention the aai is filled with refractory rings (not ostrated), where they give off heat sensitive to refractory bricks. The combustion gases that have been cooled as a result of this action of the heat recuperator through the discharge ports 9, one of which is astrated.

After the refractory lad-illos 'i t n been heated to a sufficient temperature, -I supply of fuel and combustion air through ports 6 and 7 is discontinued, after the cold air is served through the discharge port. This cold air in oceans flows through the area of -G-I tion of high temperature on axis 3 ; - retection and heat, se ^ < . In the same way, it leaves the heat recuperator by port 10. The port is connected to a distribution system for air - '.-. m "air-to-go", to be able to feed it Tie oven The g - s fuel that is fed from the port 1 connection is diverted ... clearly within the first dictation 13 for fuel gas, while the connection cable is connected to the second pipe 12 for the combustion air. The pipelines 12 LJ of power are separated from each other by division 11. The configuration around the upper end of division 11 is indicated by II and illustrates in detail, on an enlarged scale, in Figure The reference number orres pond ient - s of Figure 1 are related (ie, corresponding elements in -a Figure 2. In Figure., one can see that - the quality opening 14 of the supply duct 12 is located at a higher position than At an angle with respect to the outlet opening of the duct 13 for the fuel gas, as a result, the air flow is capable of penetrating the gas flow, resulting in mixing to form a combustible mixture. The feed pipe 3 is prooorged, below the opening 15, with a gradual expansion 16 which leads to a local narrowing of the pipe 11. E - gradual broadening 16 is joined by a widening 1 7 gradual in the direction of the uertara 15. As a result, a turbulence chamber 18 is formed between the gradual expansion 16, • ^ 1 gradual widening and the opening 15 from D to 11 d a. In the turbulence chamber 18, a movement of intense turbulence, which is attended just upstream of the outlet opening 15, is imparted to part of the gas flow, resulting in the entrainment of the combustion air from the pipeline. 12. As a result, a rich fuel mixture which has a low elution component in the main direction of flow through the combustion chamber 2 is formed in the turbulence zone 18. If this rich combustible mixture is ignited, the flame front will remain stable near the free end of the division. As a result, the pulsation of the fla is avoided, and consequently the phenomenon of vibration through the entire structure will also be avoided. e appointment On the other hand, the efficiency of i o m c u s t i o n is improved. As already mentioned, the The design is not limited to the illustrated design. In some cases, preference is given to a ceramic burner in which two ducts 12a and 12 ° of combustion air inlet are placed , _trically with respect to the supply duct 13 for the fuel gas. In this mode, as illustrated in FIG. 3, two divisions 11a and 11b are provided instead of a single division 11 and there are two openings 14a and 14b d- ^ s for the supply ducts 12a and 2o. An equally good effect is also obtained if the outlet openings 14 (or 14a and 14) for the combustion air are divided into stationary ports.

Claims (3)

1. Ceramic burner for gases, especially for use in the combustion chamber of a high-generation caler generator, as a heat recuperator for a blast furnace, the ceramic burner is supplied with a first duct for a first duct of feed for a first combustion component, such as a gas < : i usible, with a second feed duct for a second combustion component, such as a combustion nozzle, the first feed duct opens to a substantially elongated outlet opening and the second feed duct opens towards him. minus a second opening from Q to 1 i d a, these latter openings are e--; It essentially runs parallel to and current from the first outlet opening, a division, which continues up to the two exit openings, whose saline openings open directly into the combustion chamber as well as a. ar, located between the urimer supply duct and the second feed duct, and in which at least one of the first and second feed arc is provided with means to impart turbulence, hard operation to the combustion component while It emerges from the ducts in question, whose turbulence is such that a combustible mixture of the two imposing fuel streams is formed upstream of the reservoir at the end of the division, the means for imparting turbulence comprise gradual broadening, the which is accommodated near the outlet openings of at least the first and / or the second supply duct, of the transverse cut of the duct in question, so that the - n s a c hami e t g a gual is provided by the '' Infiguration of the division, and so that the gradual widening is followed, until the end of the division, by means of a gradual widening, The result of the formation of a camera of irony.

2. Ceramic burner according to claim 1, characterized in that the gradual nsanchamiento ascends from 20 to 35% of the original cross section of the duct in question.

3. Regeneration heat generator, such as an even heat recuperator, a blast furnace, which is provided with a supply port to supply gas to be heated and a discharge port to discharge heated casks, which comprises a chamber of combustion and a heat retention shaft, the combustion chamber, in order to heat the heat generator, is operated with a ceramic burner, characterized in that the ceramic burner is of the same type. with one of 1s claims terrors SUMMARY Ceramic burner for gases, especially for use in the chamber (2) of .-- mb ussion, - a heat generator of r-ae a ration, "as a heat recuperator A) for a blast furnace ( 1), whose ceramic burner is arranged on a first pipe (13) of -Amention for a first combustion component, such as a fuel gas, and with a fuel pipeline 12) for an imposing second d- combustion, r-i eats air from '- om b ustión, er pr'imer duct (13 > power supply r' D r e towards the aperture (15) of elongated elongated output and the second feed duct opens to at least the second .- - r t a r a (14 > output, this last opening is It is essentially parallel to and downstream of the first outlet opening, a line of sight (11), which continues up to the two outlet ports (14, 15), furthermore being -etched between the first duct (13) of power e_ second, uct (12) of al. mentation, in whose As a result, I read the first and second supply ducts (12, 13), which are supplied by means of turbulence, during the operation, to the combustion component that emerges through the ducts in question, whose turbulence ° 3 such that a combustible mixture of the two combustion components is formed upstream of the end of the di- ission (11).