CN111964056A - Ceramic burner and top combustion hot blast stove - Google Patents
Ceramic burner and top combustion hot blast stove Download PDFInfo
- Publication number
- CN111964056A CN111964056A CN202010898351.4A CN202010898351A CN111964056A CN 111964056 A CN111964056 A CN 111964056A CN 202010898351 A CN202010898351 A CN 202010898351A CN 111964056 A CN111964056 A CN 111964056A
- Authority
- CN
- China
- Prior art keywords
- air
- gas
- layer
- burner
- sub
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 66
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 65
- 239000003034 coal gas Substances 0.000 claims abstract description 35
- 239000003245 coal Substances 0.000 claims abstract description 10
- 239000000779 smoke Substances 0.000 claims description 7
- 238000009825 accumulation Methods 0.000 claims description 4
- 239000011449 brick Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000001172 regenerating effect Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 121
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 12
- 239000003546 flue gas Substances 0.000 abstract description 12
- 230000009286 beneficial effect Effects 0.000 abstract description 9
- 238000005516 engineering process Methods 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
- 238000005338 heat storage Methods 0.000 description 8
- 238000005260 corrosion Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 239000011819 refractory material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/02—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone
- F23D14/04—Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone induction type, e.g. Bunsen burner
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/14—Preheating the combustion air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/48—Nozzles
- F23D14/58—Nozzles characterised by the shape or arrangement of the outlet or outlets from the nozzle, e.g. of annular configuration
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/62—Mixing devices; Mixing tubes
- F23D14/64—Mixing devices; Mixing tubes with injectors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/66—Preheating the combustion air or gas
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention relates to a ceramic burner and a top combustion type hot blast stove, and belongs to the field of burners. The coal gas sub-runners in the ceramic burner have two layers of sub-runners sharing one air inlet; two layers of sub-runners in the air sub-runners share one air inlet; in the axial direction of the burner, the uppermost layer is a coal gas nozzle layer, the lowermost layer is an air nozzle layer, and other layers are air-coal mixing layers with air nozzles and coal gas nozzles arranged at the same layer; in the circumferential direction of the combustor, each gas nozzle and each air nozzle are independently arranged at intervals. The ceramic burner can enable air and gas to be mixed more uniformly, is beneficial to advancing the burning ignition position, is beneficial to improving the capability of the burner and reduces the temperature difference of the burner. The ceramic burner is applied to a top-burning hot blast stove, and is matched with a thick-thin combustion technology to reduce the content of NOx in combustion flue gas of the hot blast stove, so that the ceramic burner is a low-nitrogen environment-friendly ceramic burner and the top-burning hot blast stove.
Description
Technical Field
The invention belongs to the field of burners, and particularly relates to a ceramic burner and a top combustion type hot blast stove.
Background
At the end of the 20 th century, 80 s, first-steel top-fired hot blast stoves began to be put into operation in large blast furnaces, and at the same time, top-fired hot blast stoves, represented by russian kalugu type, were gradually popularized and applied in russia, ukraine, china, and the like; wherein China's canadian 5000m3And japanese JFE3200m3The application of the top combustion type hot blast stove in the super-large blast furnace is taken as a representative, and the application of the top combustion type hot blast stove in the super-large blast furnace is marked to realize breakthrough.
With the continuous development of blast furnace smelting technology, the requirement for high air temperature is more urgent, the high air temperature is an important measure for cost reduction and efficiency improvement, and the combustion temperature of a combustor is also continuously increased in order to obtain the high air temperature, so that the high combustion efficiency is also the requirement for the development of a top combustion type hot air furnace combustor.
However, the requirement of high air temperature brings environmental protection problem, and the emission of NOx in the combustion flue gas is increased correspondingly, on one hand, the emission of high NOx can not meet the increasingly strict national emission standard, and on the other hand, the NOx in the combustion flue gas of the hot blast stove can generate stress corrosion to the furnace shell of a high-temperature area and low-temperature dew point corrosion after a heat exchanger, thereby affecting the service life of the hot blast stove and the equipment thereof. Therefore, the existing top combustion hot blast stove can not realize two functions under the requirements of high wind temperature and high environmental protection.
Disclosure of Invention
In view of the above, the present invention provides a ceramic burner and a top-combustion hot blast stove, which can improve the combustion efficiency of the burner, control the generation amount of NOx, and prolong the service life of the equipment on the premise of meeting the environmental protection development requirement.
In order to achieve the purpose, the invention provides the following technical scheme:
a ceramic burner comprises a shell and a ceramic lining arranged in the shell, wherein a gas loop connected with a gas inlet pipe and an air loop connected with an air inlet pipe are arranged in the ceramic lining; along the axial direction of the burner, the gas sub-channels penetrating through the ceramic lining form a plurality of layers of gas nozzles on the inner wall surface of the ceramic lining, and the air sub-channels penetrating through the ceramic lining form a plurality of layers of air nozzles on the inner wall surface of the ceramic lining.
The gas sub-runners connected with the gas loop are provided with three layers from top to bottom, wherein the third layer of gas sub-runner shares one gas inlet with the second layer of gas sub-runner in the form of a second layer of gas sub-runner branch; the air sub-runners connected with the air loop are provided with three layers from top to bottom, wherein the air sub-runner of the first layer shares an air inlet with the air sub-runner of the second layer in the form of a branch of the air sub-runner of the second layer.
In the axial direction of the burner, the uppermost layer is a coal gas nozzle layer, the lowermost layer is an air nozzle layer, and other layers are air-coal mixing layers with air nozzles and coal gas nozzles arranged at the same layer; in the circumferential direction of the combustor, each gas nozzle and each air nozzle are independently arranged at intervals.
Further, in the circumferential direction of the burner, the gas jets and the air jets are arranged in an alternating pattern.
Furthermore, on a horizontal plane vertical to the axis of the burner, an included angle alpha between the axis of the air sub-channel with one port as the air nozzle and the symmetrical axis of the burner on the horizontal plane1Is 0 to 45 degrees; an included angle alpha between the axis of the gas branch channel with one end opening as a gas nozzle and the symmetric axis of the burner on the horizontal plane2Is 0 to 45 degrees; on the vertical surface, one end opening is the included angle beta between the axial line of the air branch channel of the air nozzle and the axial line of the burner1Is 45 degrees to 90 degrees; included angle beta between the axis of the gas branch channel with one end opening as the gas nozzle and the axis of the burner2Is 45-90 degrees.
Furthermore, the coal gas sub-runners on the uppermost layer are obliquely arranged in the direction of the lower part of the mixing chamber through nozzles, the coal gas sub-runners on the second layer are horizontally arranged in the axis mode, and the coal gas sub-runners on the third layer are obliquely arranged in the direction of the lower part of the mixing chamber through nozzles.
The air branch passages on the uppermost layer are arranged with the nozzles inclined toward the upper part of the mixing chamber, the air branch passages on the second layer are arranged with the axes thereof horizontal, and the air branch passages on the third layer are arranged with the nozzles inclined toward the upper part of the mixing chamber.
A top combustion hot blast stove comprises a ceramic burner, a conical section combustion chamber and a regenerative chamber which are sequentially connected from high to low along the axis direction; a hot air outlet is arranged on the straight cylinder section of the conical section combustion chamber; the ceramic burner is the ceramic burner.
Furthermore, the lower part of the heat accumulation chamber is provided with a gas collection chamber, a heat accumulator is arranged in the heat accumulation chamber, and the heat accumulator is arranged above the gas collection chamber through a supporting device.
Further, the supporting equipment comprises a pillar, a joist and a quincunx hole grate which are arranged from bottom to top in sequence; the bottom of the regenerator is provided with a smoke outlet and a cold air inlet at the position corresponding to the support.
Further, the ceramic lining and the cone section combustion chamber in the ceramic combustor act on the outer shell through brick supports respectively.
Furthermore, in the same air-coal mixing layer, the number of the coal gas nozzles is the same as that of the air nozzles.
The invention has the beneficial effects that:
the low NOx burner matched with the top combustion type hot blast stove divides air gas into a plurality of staggered cyclone mixing on a horizontal plane or realizes the staggered cyclone mixing of the air gas in a vertical direction through the change of an internal structure form, so that the mixing is more uniform, the combustion is more sufficient and the combustion efficiency is improved in the same combustion space.
The NOx content in the combustion flue gas can be reduced by adopting a thick-thin combustion technology through the non-stoichiometric proportion of local air gas so as to meet the requirements of national environmental protection and hot blast stove technical development; and the emission of NOx in combustion flue gas is reduced, the stress corrosion of a furnace shell in a high-temperature area and the dew point corrosion of a low-temperature section of a heat exchanger can be reduced, and therefore the service lives of the hot blast stove and equipment thereof are prolonged.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and combinations particularly pointed out hereinafter.
Drawings
For the purposes of promoting a better understanding of the objects, aspects and advantages of the invention, reference will now be made to the following detailed description taken in conjunction with the accompanying drawings in which:
FIG. 1 is a schematic structural view of a top-fired stove;
FIG. 2 is a schematic structural view of a ceramic burner;
FIG. 3 is an enlarged view of a portion of FIG. 2;
FIG. 4 is a cross-sectional view A-A of FIG. 2;
fig. 5 is an enlarged view of a portion B of fig. 1.
Reference numerals:
the device comprises a ceramic burner 1, a conical section combustion chamber 2, a regenerator 3, a mixing chamber 4, a gas collection chamber 5, a regenerator 6, a support device 7, a brick support 8 and a shell 9;
the gas-liquid separation device comprises a ceramic lining 101, a gas inlet pipe 102, a gas loop 103, an air inlet pipe 104, an air loop 105, a gas sub-channel 106, an air sub-channel 107, a gas nozzle 108 and an air nozzle 109;
a hot air outlet 201; a smoke outlet 301 and a cold air inlet 302;
a pillar 701, a joist 702, a quincunx-hole grate 703;
a first layer of gas sub-runner 106a, a second layer of gas sub-runner 106b and a third layer of gas sub-runner 106 c;
a first layer air subchannel 107a, a second layer air subchannel 107b, and a third layer air subchannel 107 c;
hot-blast stove axis OO ', ceramic burner symmetry axis PP', gas runner axis MM ', air runner axis NN'.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention in a schematic way, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustrating the invention only and not for the purpose of limiting the same, and in which there is shown by way of illustration only and not in the drawings in which there is no intention to limit the invention thereto; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front", "rear", etc., based on the orientation or positional relationship shown in the drawings, it is only for convenience of description and simplification of description, but it is not an indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes, and are not to be construed as limiting the present invention, and the specific meaning of the terms may be understood by those skilled in the art according to specific situations.
Referring to fig. 2 to 4, a ceramic burner 1 comprises a housing 9 and a ceramic liner 101 disposed in the housing 9, the ceramic liner 101 is provided with a gas loop 103 connected to a gas inlet pipe 102 and an air loop 105 connected to an air inlet pipe 104, the gas loop 103 is connected to a gas bypass 106 for introducing gas in the gas loop into a mixing chamber 4, and the air loop 105 is connected to an air bypass 107 for introducing air in the air loop into the mixing chamber 4; in the direction of the axis OO' of the burner, the gas branch passage 106 passing through the ceramic liner 101 forms a plurality of layers of gas jets 108 on the inner wall surface of the ceramic liner 101, and the air branch passage 107 passing through the ceramic liner 101 forms a plurality of layers of air jets 109 on the inner wall surface of the ceramic liner.
In the ceramic burner 1, the gas in the gas loop 103 is introduced into the mixing chamber 4 through the gas branch passage 106, and a plurality of gas nozzles 108 are arranged in the same standard high layer, namely the gas nozzles 108 are arranged in a mode of surrounding the wall surface of the mixing chamber 4 and in a mode of being arranged along the axis OO' of the burner in a high-low mode to form a plurality of layers, so that the gas can be uniformly distributed in all positions of the mixing chamber without aggregation. Correspondingly, air is also introduced into the mixing chamber 4 in the same manner; because the air nozzle 109 and the gas nozzle 108 are overlapped, the air and the gas can be synchronously mixed in a multilayer staggered rotational flow in the horizontal direction when being injected. On one hand, the process can lead the air inlet and the coal gas to be mixed more uniformly, and the combustion efficiency is higher; on the other hand, the combustion position can be advanced, which is beneficial to fully utilizing the combustion chamber of the hot blast stove, improving the capability of the burner and reducing the temperature difference of the burner, thereby being beneficial to improving the service life of the refractory material of the burner.
Specifically, in the ceramic burner 1, the gas branch channel 106 connected to the gas loop 103 is provided with three layers (106 a, 106b, 106c in the figure) from top to bottom, wherein the third layer of gas branch channel 106c shares one gas inlet with the second layer of gas branch channel 106b in the form of a branch of the second layer of gas branch channel 106 b; the air sub-channels 107 connected to the air loops 105 are provided with three layers (107 a, 107b, 107c in the figure) from top to bottom, wherein the first layer of air sub-channels 107a shares one air inlet with the second layer of air sub-channels 107b in the form of branches of the second layer of air sub-channels 107 b. In the direction of the axis OO' of the burner, four nozzle layers are formed, the uppermost layer is a coal gas nozzle layer, the lowermost layer is an air nozzle layer, and the other two layers are air-coal mixing layers with air nozzles and coal gas nozzles arranged on the same layer. In the circumferential direction of the burner, each gas nozzle and each air nozzle are independently arranged at intervals, which means that even in the air-coal mixing layer, the gas nozzles and the air nozzles do not share (gas outlet) nozzles. The arrangement is more beneficial to the arrangement of the air loop, the gas loop, the air sub-channel and the gas sub-channel in a limited space, and simultaneously, the air and the gas can be ensured to be mixed in the mixing chamber 4.
Preferably, in the circumferential direction of the burner, the plurality of gas nozzles 108 and the plurality of air nozzles 109 arranged in the same layer are alternately arranged, that is, on an air-coal mixing layer (the air nozzles and the gas nozzles are located on the same elevation layer), the gas nozzles 108 are correspondingly arranged on two sides of each air nozzle 109, and the air nozzles 109 are correspondingly arranged on two sides of each gas nozzle 108, so that the air-coal staggered swirl mixing can achieve the optimal effect.
For better swirl effect, the gas and the air are ejected from the gas nozzle 108 and the air nozzle 109 at a certain spatial angle, which means that the gas outlet end is the gas of the gas nozzle 108/the air nozzle 109Runners 106/air runners 107 are arranged at a spatial angle in the ceramic lining 101. Preferably, in a horizontal plane perpendicular to the direction of the axis OO ', an angle α is formed between the (spatial) axis NN ' of the air branch duct 107 of the air nozzle 109 (and the axis of the air nozzle) and the symmetry axis PP ' of the ceramic burner in the horizontal plane1Is 0 to 45 degrees. On the vertical surface, an included angle beta between the axis NN 'of the air branch channel 107 with one port as the air nozzle 109 and the axis OO' of the ceramic burner1Is 45-90 degrees. Here, the axis NN ' may be projected on a horizontal plane and a vertical plane, respectively, and the symmetry axis PP ' is a straight line having any diameter on a horizontal plane perpendicular to the axis OO ' of the ceramic burner.
Similarly, on a horizontal plane perpendicular to the axis OO ', an angle α between the (spatial) axis MM ' (which is also the gas nozzle axis) of the gas branch channel 106 of the gas nozzle 108 and the symmetry axis PP ' of the ceramic burner on the horizontal plane is defined as the angle α between the gas nozzle axis and the symmetry axis of the ceramic burner2Is 0 to 45 degrees. On the vertical surface, the included angle beta between the axis MM 'of the gas branch channel with one end opening as the gas nozzle and the axis OO' of the burner2Is 45-90 degrees. According to actual requirements, the spatial inclination angles of the air nozzle and the gas nozzle can be selected to be the same or different.
As a further improvement of the above, the gas branch passage (first layer gas branch passage 106a) located at the uppermost layer is provided with the nozzle inclined toward the lower portion of the mixing chamber 4, the gas branch passage 106b located at the second layer is provided with the axis thereof horizontal, and the gas branch passage 106c located at the third layer is provided with the nozzle inclined toward the lower portion of the mixing chamber. The air flow branch passage (first layer air flow branch passage 107a) located at the uppermost layer is provided with nozzles inclined toward the upper portion of the mixing chamber 4, the air flow branch passage 107b located at the second layer is provided with its axis horizontal, and the air flow branch passage 107c located at the third layer is provided with nozzles inclined toward the upper portion of the mixing chamber 4. At the moment, air and coal gas correspondingly sprayed out from each layer of nozzles can realize 'rotational flow' in the mixed type 4, and besides the 'rotational flow', the air and the coal gas can realize 'mixed flow' in the mixed type due to reverse spraying because the nozzles face different directions, so that the air-coal gas staggered rotational flow mixing achieves the optimal effect.
As shown in fig. 1 and 5, the top-combustion hot blast stove comprises a ceramic burner 1, a conical section combustion chamber 2 and a regenerative chamber 3 which are connected in sequence from high to low along an axis OO'; a hot air outlet 201 is arranged on the straight cylinder section of the conical section combustion chamber 2; the ceramic burner 1 is the above-described ceramic burner.
The structure form of the ceramic burner 1 is adjusted by the top combustion type hot blast stove, coal gas in a coal gas loop 103 is introduced into a mixing chamber 4 through a coal gas sub-channel 106, three layers of coal gas nozzles 108 are formed by the coal gas sub-channels 106a, 106b and 106c which are arranged in a high-low mode, three layers of air nozzles 109 are formed by the air sub-channels 107a, 107b and 107c which are arranged in a high-low mode, and meanwhile, the lower layer of coal gas nozzles and the upper layer of air nozzles are arranged corresponding to the same level layer in a mode of nozzle alternate arrangement, so that staggered swirl mixing of air and coal gas between layers can be synchronously realized in the process of injecting air and coal gas, so that the air and coal gas are mixed more uniformly, and the combustion efficiency is higher; through the non-stoichiometric proportion of local air gas and the adoption of thick and thin combustion, the aim of reducing the content of NOx in combustion flue gas can be fulfilled in a matched manner. In addition, the arrangement can also lead the combustion ignition position to be advanced, thus being beneficial to more fully utilizing the combustion chamber of the hot blast stove, being beneficial to improving the capability of the burner and reducing the temperature difference of the burner, thereby being beneficial to improving the service life of the refractory material of the burner.
In addition, for better matching with the dense-dilute combustion, the number of the coal gas nozzles 108 is the same as that of the air nozzles 109 in the same air-coal mixing layer.
In the top combustion type hot blast furnace, the lower part of the heat storage chamber 3 is provided with a gas collection chamber 5, a heat storage body 6 is arranged in the heat storage chamber 3, and the heat storage body 6 is arranged above the gas collection chamber 5 through a supporting device 7. The supporting device 7 comprises a pillar 701, a joist 702 and a quincunx-hole grate 703 which are arranged from bottom to top in sequence; the bottom of the regenerator 3 is provided with a smoke outlet 301 and a cold air inlet 302 at the position corresponding to the support column 701, wherein the cold air inlet 302 can also enter from the smoke outlet 301.
In the top combustion type hot blast stove, the ceramic lining 2 is built by a plurality of layers of refractory materials, the working layer of the ceramic lining 101 can be made of refractory materials with excellent thermal shock resistance, the lower edge of the mixing chamber 4 is connected with the conical section combustion chamber 2, and the ceramic lining 101 and the conical section combustion chamber 2 in the whole ceramic burner 1 act on the metal shell 9 through the brick support 8 respectively.
The following description will be given by taking a top-fired hot blast stove as an example:
the refractory material arranged in the metal shell 9 comprises a (air-gas) mixing chamber 4, a conical section combustion chamber 2, a regenerator 3 and a gas collection chamber 5 from top to bottom according to the functional parts of the components. Wherein a supporting device 7 for supporting a heat accumulator 6 is arranged between the heat accumulator 3 and the lower gas collecting chamber 5.
Be equipped with three-layer air spout 109 and three-layer coal gas spout 108 on this ceramic burner 1 in top combustion formula hot-blast furnace, wherein two-layer coal gas spout correspond with two-layer air spout with the interval arrangement of the same elevation layer form, on this ceramic burner, the conformal four layers of spout layers that form, from top to bottom do in proper order: the air-gas nozzle layer comprises a gas nozzle layer, an air-gas nozzle layer and an air nozzle layer. On the horizontal plane, the gas nozzles and the air nozzles are arranged in a staggered mode around the circumferential direction. The aim of reducing the content of NOx in combustion smoke can be fulfilled by adopting thick-thin combustion through the non-stoichiometric proportion of local air gas.
Air is introduced into the air loop 105 through an air inlet pipe 104, three groups (also three layers) of air diversion channels 107a, 107b and 107c are connected to the air loop 105 from top to bottom, wherein the air diversion channels 107a and 107b are the same inlet, the outlet is divided into two layers, and the three layers of air diversion channels 107a, 107b and 107c correspondingly form three layers of air nozzles on the wall surface of the mixing chamber 4.
Air enters the mixing chamber 4 from the air loop 105 via three sets of air diversion channels 107a, 107b, 107c and the air jets corresponding to each air diversion channel. The first layer air branch channel 107a of the two layers of air branch channels 107a and 107b with the same inlet is led to the second layer of coal gas branch channel 106b and is alternately arranged with the same interval. The lowest layer of the three air nozzle layers from bottom to top only has air nozzles; the other two layers are air-gas nozzle layers including airGas spout and coal gas spout. In order to further enhance mixing, the included angle alpha between the central axis of the three layers of air nozzles and the radius line of the combustor on the horizontal plane1Is 15-30 degrees; to further enhance mixing, the included angle beta between the vertical axes of the central axis mixing chamber of the three-layer air nozzle on the vertical plane1Is 60 to 75 degrees.
Correspondingly, the gas is introduced into the gas loop 105 through a gas inlet pipe 102, three groups (also three layers) of gas sub-runners 106a, 106b and 106c are connected to the gas loop 105 from top to bottom, wherein the gas sub-runners 106b and 106c are the same inlet, the outlet is divided into two layers, and the three layers of gas sub-runners correspondingly form three layers of gas nozzles on the wall surface of the mixing chamber 4.
Gas enters the mixing chamber 4 from the gas loop 103 via three sets of gas diversion channels 106a, 106b, 106c and each gas jet corresponding to a gas diversion channel. The third layer of gas branch channels 106c in the two layers of gas branch channels 106b and 106c with the same inlet are led to the second layer of air branch channels 107b and are alternately arranged with intervals. In the three gas nozzle layers from top to bottom, the uppermost layer is only provided with gas nozzles, and the rest two layers are air-gas nozzle layers and comprise air nozzles and gas nozzles. In order to further enhance mixing, the included angle alpha between the central axis of the three layers of gas nozzles and the radius of the cross section of the burner on the horizontal plane2Is 15-30 degrees; in order to further enhance mixing, the included angle beta between the central axes of the three layers of gas nozzles on the vertical surface and the axis of the mixing chamber2Is 60 to 75 degrees. Through the multilayer staggered cyclone mixing of the air gas, the air gas is mixed more uniformly and is combusted more fully, so that the combustion efficiency is improved.
In the combustion period of the top-combustion hot blast stove, gas and (combustion-supporting) air respectively enter the ceramic burner 1 through the gas inlet pipe 102 and the air inlet pipe 104, and then are sprayed out from the gas nozzles 108 and the air nozzles 109 in a staggered swirling manner, after being mixed well in the mixing chamber 4, the mixed gas enters the conical section combustion chamber 2 for combustion, the content of NOx in the combustion flue gas is reduced by adopting thick and thin combustion according to the non-chemical equivalent ratio by controlling the ratio of each gas nozzle 108 to each air nozzle 109, the content of less NOx in the flue gas generates less stress corrosion to a high-temperature furnace shell, the high-temperature flue gas enters the heat storage chamber 3, the flue gas transmits heat to the heat storage body 6 and then enters the gas collection chamber 5 at the lower part, finally the heat is discharged through the smoke outlet 301, the residual heat in the flue gas can be recycled to air and dew point through a waste heat recovery device, and the content of less NOx in the flue gas generates less low-temperature section corrosion to a waste heat recovery device.
In the air supply period of the top combustion type hot blast stove, cold air enters the air collection chamber 5 from the cold air inlet 302 at the lower part, passes through the heat storage chamber 3, exchanges heat with the high-temperature heat storage body 6, is heated into hot air, is discharged from the hot air outlet 201 at the upper part, and is sent to the blast furnace for smelting of the blast furnace.
Finally, the above embodiments are only intended to illustrate the technical solutions of the present invention and not to limit the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that modifications or equivalent substitutions may be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the claims of the present invention.
Claims (9)
1. A ceramic burner comprises a shell and a ceramic lining arranged in the shell, wherein a gas loop connected with a gas inlet pipe and an air loop connected with an air inlet pipe are arranged in the ceramic lining; along the axial direction of the burner, a plurality of layers of gas nozzles are formed on the inner wall surface of the ceramic lining through the gas sub-channels of the ceramic lining, and a plurality of layers of air nozzles are formed on the inner wall surface of the ceramic lining through the air sub-channels of the ceramic lining; the method is characterized in that:
the gas sub-runners connected with the gas loop are provided with three layers from top to bottom, wherein the third layer of gas sub-runner shares one gas inlet with the second layer of gas sub-runner in the form of a second layer of gas sub-runner branch; the air sub-runners connected with the air loop are provided with three layers from top to bottom, wherein the first layer of air sub-runner shares an air inlet with the second layer of air sub-runner in the form of a branch of the second layer of air sub-runner;
in the axial direction of the burner, the uppermost layer is a coal gas nozzle layer, the lowermost layer is an air nozzle layer, and other layers are air-coal mixing layers with air nozzles and coal gas nozzles arranged at the same layer; in the circumferential direction of the combustor, each gas nozzle and each air nozzle are independently arranged at intervals.
2. The ceramic burner of claim 1, wherein: in the circumferential direction of the burner, the gas jets and the air jets are arranged in an alternating pattern.
3. The ceramic burner of claim 1, wherein: on a horizontal plane vertical to the axis of the burner, an included angle alpha between the axis of an air sub-channel with one port as an air nozzle and the symmetrical axis of the burner on the horizontal plane1Is 0 to 45 degrees; an included angle alpha between the axis of the gas branch channel with one end opening as a gas nozzle and the symmetric axis of the burner on the horizontal plane2Is 0 to 45 degrees; on the vertical surface, one end opening is the included angle beta between the axial line of the air branch channel of the air nozzle and the axial line of the burner1Is 45 degrees to 90 degrees; included angle beta between the axis of the gas branch channel with one end opening as the gas nozzle and the axis of the burner2Is 45-90 degrees.
4. A ceramic burner as claimed in claim 3, wherein: the coal gas sub-runners on the uppermost layer are obliquely arranged in the direction of the lower part of the mixing chamber through nozzles, the coal gas sub-runners on the second layer are horizontally arranged in the axis mode, and the coal gas sub-runners on the third layer are obliquely arranged in the direction of the lower part of the mixing chamber through nozzles;
the air branch passages on the uppermost layer are arranged with the nozzles inclined toward the upper part of the mixing chamber, the air branch passages on the second layer are arranged with the axes thereof horizontal, and the air branch passages on the third layer are arranged with the nozzles inclined toward the upper part of the mixing chamber.
5. A top combustion hot blast stove comprises a ceramic burner, a conical section combustion chamber and a regenerative chamber which are sequentially connected from high to low along the axis direction; a hot air outlet is arranged on the straight cylinder section of the conical section combustion chamber; the method is characterized in that: the ceramic burner according to any one of claims 1 to 4.
6. The top combustion stove according to claim 5, characterized in that: the lower part of the heat accumulation chamber is provided with a gas collection chamber, a heat accumulator is arranged in the heat accumulation chamber, and the heat accumulator is arranged above the gas collection chamber through a support device.
7. The top combustion stove according to claim 6, characterized in that: the supporting equipment comprises a pillar, a joist and a quincunx hole grate which are arranged from bottom to top in sequence; the bottom of the regenerator is provided with a smoke outlet and a cold air inlet at the position corresponding to the support.
8. The top combustion stove according to claim 5, characterized in that: the ceramic lining and the cone-section combustion chamber in the ceramic combustor act on the outer shell through brick supports respectively.
9. The top combustion stove according to claim 5, characterized in that: in the same air-coal mixing layer, the number of the coal gas nozzles is the same as that of the air nozzles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010898351.4A CN111964056A (en) | 2020-08-31 | 2020-08-31 | Ceramic burner and top combustion hot blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010898351.4A CN111964056A (en) | 2020-08-31 | 2020-08-31 | Ceramic burner and top combustion hot blast stove |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111964056A true CN111964056A (en) | 2020-11-20 |
Family
ID=73400216
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010898351.4A Pending CN111964056A (en) | 2020-08-31 | 2020-08-31 | Ceramic burner and top combustion hot blast stove |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111964056A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3891384A (en) * | 1973-11-05 | 1975-06-24 | Bloom Eng Co Inc | Stove burner |
| DE3037609A1 (en) * | 1979-01-27 | 1982-04-22 | Hermann Rappold & Co GmbH, 5160 Düren | Ceramic burner for hot blast stove - with gas channel, air nozzles and salient burner mouth rings coaxial to combustion shaft |
| CN1858492A (en) * | 2005-04-30 | 2006-11-08 | 武汉冶金建筑研究院 | Multiple fire hole flame-free ceramic burner |
| CN201313912Y (en) * | 2008-11-20 | 2009-09-23 | 鞍钢集团设计研究院 | Burner of top-combustion hot-blast stove |
| CN201634702U (en) * | 2010-01-26 | 2010-11-17 | 北京首钢国际工程技术有限公司 | High-temperature and low-oxygen top-combustion type hot-blast stove |
| JP2012241204A (en) * | 2011-05-16 | 2012-12-10 | Nippon Steel Engineering Co Ltd | Ceramic burner for hot blast stove |
| CN103866071A (en) * | 2014-03-14 | 2014-06-18 | 武汉科技大学 | Multi-layer circuit and multi-burner port flameless ceramic burner |
| KR20180008814A (en) * | 2017-08-16 | 2018-01-24 | 엠씨씨 캐피탈 엔지니어링 앤드 리서치 인코포레이션 리미티드 | A top-burning hot blast furnace burner |
| CN207035130U (en) * | 2017-08-16 | 2018-02-23 | 中冶京诚工程技术有限公司 | A kind of rotary-cut top burning type hot blast stove combustor |
| WO2018082001A1 (en) * | 2016-11-04 | 2018-05-11 | 郑州安耐克实业有限公司 | Novel top-combustion hot blast stove |
| CN212456849U (en) * | 2020-08-31 | 2021-02-02 | 中冶赛迪工程技术股份有限公司 | Ceramic burner and top combustion hot blast stove |
-
2020
- 2020-08-31 CN CN202010898351.4A patent/CN111964056A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3891384A (en) * | 1973-11-05 | 1975-06-24 | Bloom Eng Co Inc | Stove burner |
| DE3037609A1 (en) * | 1979-01-27 | 1982-04-22 | Hermann Rappold & Co GmbH, 5160 Düren | Ceramic burner for hot blast stove - with gas channel, air nozzles and salient burner mouth rings coaxial to combustion shaft |
| CN1858492A (en) * | 2005-04-30 | 2006-11-08 | 武汉冶金建筑研究院 | Multiple fire hole flame-free ceramic burner |
| CN201313912Y (en) * | 2008-11-20 | 2009-09-23 | 鞍钢集团设计研究院 | Burner of top-combustion hot-blast stove |
| CN201634702U (en) * | 2010-01-26 | 2010-11-17 | 北京首钢国际工程技术有限公司 | High-temperature and low-oxygen top-combustion type hot-blast stove |
| JP2012241204A (en) * | 2011-05-16 | 2012-12-10 | Nippon Steel Engineering Co Ltd | Ceramic burner for hot blast stove |
| CN103866071A (en) * | 2014-03-14 | 2014-06-18 | 武汉科技大学 | Multi-layer circuit and multi-burner port flameless ceramic burner |
| WO2018082001A1 (en) * | 2016-11-04 | 2018-05-11 | 郑州安耐克实业有限公司 | Novel top-combustion hot blast stove |
| CN108603660A (en) * | 2016-11-04 | 2018-09-28 | 郑州安耐克实业有限公司 | Novel top combustion hot stove |
| KR20180008814A (en) * | 2017-08-16 | 2018-01-24 | 엠씨씨 캐피탈 엔지니어링 앤드 리서치 인코포레이션 리미티드 | A top-burning hot blast furnace burner |
| CN207035130U (en) * | 2017-08-16 | 2018-02-23 | 中冶京诚工程技术有限公司 | A kind of rotary-cut top burning type hot blast stove combustor |
| CN212456849U (en) * | 2020-08-31 | 2021-02-02 | 中冶赛迪工程技术股份有限公司 | Ceramic burner and top combustion hot blast stove |
Non-Patent Citations (2)
| Title |
|---|
| 王贤;罗志红;: "顶燃式热风炉陶瓷燃烧器结构设计优化方向的研究", 钢铁技术, no. 02, 25 June 2013 (2013-06-25) * |
| 王贤;罗志红;: "顶燃式热风炉陶瓷燃烧器结构设计的优化", 炼铁, no. 05, 12 October 2012 (2012-10-12) * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101707893B (en) | Air heater | |
| CN201288198Y (en) | Multi-contact circle rotational flow top burning hot blast stove | |
| CN108603660B (en) | Top combustion hot blast stove | |
| CN105650624A (en) | Hot-blast stove for classification premixed combustion and flow equalizing heat transfer of gas and air | |
| CN201817505U (en) | Low type high-wind temperature top combustion hot blast stove | |
| CN212456849U (en) | Ceramic burner and top combustion hot blast stove | |
| CN203653595U (en) | Hot-blast stove with high-speed swirl premixed heat storage self-preheating combustion device | |
| CN102494343B (en) | Combustion device for rotational flow mixed combustion by spraying air above uniformly distributed gas jets in loop | |
| CN102288022B (en) | Sleeve-type gas-burning shaft kiln | |
| CN202415584U (en) | Hot-blast stove for mixing gas with air and spraying from evenly distributed nozzles to form reverse-flow preheating combustion | |
| CN203517788U (en) | Porous body burning combustor of remixing coal gas whirl flow with premix gas | |
| CN203360477U (en) | Hot blast stove adopting coal gas and air orthogonal jetting and mixing and porous body for combustion supporting | |
| CN111964056A (en) | Ceramic burner and top combustion hot blast stove | |
| CN103740880B (en) | High-velocity burner for self-preheating of rotational flow and back flow in premixed airflow heat accumulator | |
| CN202415583U (en) | Hot-blast stove with upwards spraying air and rotational-flow mixed combusting apparatus and coal gas nozzles uniformly distributed in ring channel | |
| CN202808853U (en) | Hot-blast stove for realizing combustion in heat-retaining mass via up-and-down injecting, hedging and mixing of nozzles in pre-combustion chamber | |
| RU2316600C2 (en) | Air heater | |
| CN102766713A (en) | Air heating furnace with nozzles in pre-burning chamber for reflowing preheating burning by opposed jetting and mixing | |
| CN102051425A (en) | High-wind-temperature hot blast heater with automatic air preheater | |
| CN203653596U (en) | Staged mixed combustion hot-air furnace with annularly and uniformly distributed coal gas and air nozzles | |
| CN1680608B (en) | External distributor style top-burning hot-air furnace | |
| CN103484588A (en) | Top combustion type hot air furnace arranging annular flameless combustion device below arch roof of combustion chamber | |
| CN203807501U (en) | Combustor of top-combustion type hot-blast stove | |
| CN1858492A (en) | Multiple fire hole flame-free ceramic burner | |
| CN202519283U (en) | Hot-blast stove with uniformly distributed nozzles jetting mixed hedging back flows for warm-up combustion in pre-combustion chamber |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |