CN117537614A - Heating hearth capable of improving temperature uniformity and self-preheating combustion method - Google Patents
Heating hearth capable of improving temperature uniformity and self-preheating combustion method Download PDFInfo
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- CN117537614A CN117537614A CN202311364413.3A CN202311364413A CN117537614A CN 117537614 A CN117537614 A CN 117537614A CN 202311364413 A CN202311364413 A CN 202311364413A CN 117537614 A CN117537614 A CN 117537614A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 42
- 238000009841 combustion method Methods 0.000 title description 4
- 239000000779 smoke Substances 0.000 claims abstract description 52
- 239000003517 fume Substances 0.000 claims abstract description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 112
- 239000003546 flue gas Substances 0.000 claims description 112
- 238000002485 combustion reaction Methods 0.000 claims description 49
- 238000007599 discharging Methods 0.000 claims description 8
- 238000009826 distribution Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 claims description 6
- 238000012806 monitoring device Methods 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 5
- 238000010285 flame spraying Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B17/00—Furnaces of a kind not covered by any preceding group
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
- F27D17/002—Details of the installations, e.g. fume conduits or seals
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D99/00—Subject matter not provided for in other groups of this subclass
- F27D99/0001—Heating elements or systems
- F27D99/0033—Heating elements or systems using burners
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- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Tunnel Furnaces (AREA)
Abstract
The utility model provides a can improve heating furnace of temperature homogeneity, comprises furnace wall (1), bell (15) and a plurality of self-preheating nozzle body (5) of embedding, and run through the wall body inside and outside, its characterized in that: two sides of the furnace wall (1) are correspondingly distributed in a group of face-to-face manner A 、1 B ) The burner is provided with a plurality of self-preheating burner bodies (5) which are distributed in a staggered manner and a furnace wall smoke discharge channel inlet (2) which is positioned in the hearth, so that a glowing air flow outlet of the self-preheating burner bodies (5) arranged on one side of the furnace wall is opposite to the furnace wall smoke discharge channel inlet (2) arranged on the opposite hearth; and hidden fume exhaust passages are arranged in the furnace walls (1) which are respectively provided with the self-preheating burner bodies (5)A track (12).
Description
Technical Field
The invention relates to a heating hearth capable of improving the temperature uniformity of the hearth and a self-preheating combustion method thereof, and belongs to the technical field of industrial furnace heating.
Background
The uniform and accurate control of the temperature in the hearth of the industrial furnace is the key for improving the quality of heated materials and reducing the energy consumption. The key to realizing uniformity of temperature in the furnace and accurate control is the combustion state of the burner arranged in the furnace and the trend of flue gas in the furnace.
The same lines at home and abroad propose a plurality of designs for realizing the temperature uniformity in the hearth of the industrial furnace, improving the quality of heated articles and reducing the energy consumption. The technical measures for achieving this aim are summarized in the following categories:
(1) When the temperature in the furnace is lower (the furnace temperature is less than or equal to 800 ℃), a high-temperature fan is arranged in the furnace to stir or circulate strong convection to the atmosphere in the furnace so as to ensure the uniformity of the temperature in the furnace.
(2) When the furnace temperature is higher (the furnace temperature is more than or equal to 800 ℃), the uniformity of the temperature in the furnace is pursued mainly by improving the high-speed combustion of the burner to stir the flue gas in the furnace. Such as pulse combustion, high-speed burner combustion, flameless combustion, etc.
(3) When the furnace temperature exceeds 1200 ℃, the uniformity of the temperature in the furnace is difficult to realize only by the combustion state (the local high temperature area is obvious), and the trend (or path) of the smoke emission in the furnace plays a very important role in the uniformity of the temperature in the furnace.
For the condition of high furnace temperature (the furnace temperature is more than or equal to 1200 ℃), in order to meet the requirement of the relative uniformity of the temperature in the furnace, a plurality of attempts are made on the arrangement of a smoke emission outlet. For example, the initial stage of the slab walking beam heating furnace is designed to be upper smoke exhaust, so that the influence on the temperature uniformity of the preheating section is large, and the slab preheating is particularly unfavorable. At present, the lower smoke discharge is changed, and the preheating effect of the plate blank is greatly improved. For example, a soaking furnace for heating an ingot is also provided with a smoke outlet for discharging smoke downward.
Clearly this indicates that: the design of the position of the smoke outlet has great influence on the uniformity of the temperature in the furnace. Although the smoke outlet of many industrial furnaces is well improved in temperature uniformity in the furnace through the optimized design, because the flow of the smoke in the furnace is influenced by the furnace type, the heated objects and the like, a stagnation area still exists in the furnace, so that the heating quality of the heated objects is seriously influenced due to the fact that the local temperature in the furnace is too high or too low, and particularly, the production process is seriously influenced due to the fact that the temperature is too high or too low in the tank type metal reduction furnace.
Another way to achieve uniformity of temperature in the furnace is to "stir" the flue gas in the furnace by pulse combustion to achieve uniformity of the furnace temperature. For example, regenerative combustion is one type of pulse combustion. The burner is opened and closed regularly through the reversing valve, namely the high preheating temperature of the combustion air is improved, the flue gas is recovered for preheating, and the effect of stirring the flue gas in the furnace is achieved. However, this combustion mode is a combustion process performed on a pair of burners, i.e., one burner burns and the opposite burner discharges smoke. The stroke of flue gas in the furnace is in a straight line, in addition, the local temperature near the burner is high due to the high preheating temperature of combustion air, and the temperature of the flue gas near the smoke exhaust part is low, generally, the difference between the highest temperature and the lowest temperature in the furnace is 150-200 ℃, the temperature fluctuation in the furnace is large, and the furnace temperature uniformity in the real sense is difficult to realize. Also, the pulse combustion process results in large temperature fluctuations within the furnace, which is not well suited for some furnaces requiring constant temperature heating.
Therefore, a heating furnace capable of improving the uniformity of the temperature in the heating furnace chamber has been sought, and a technical problem that the skilled person desires to solve has been always sought.
Disclosure of Invention
The purpose of the invention is that: aims to provide a heating furnace hearth structure capable of realizing uniform distribution of temperature in a furnace and accurately controlling the temperature and a combustion control method thereof, thereby achieving the aims of improving the quality of heated objects and reducing energy consumption.
The utility model provides a can improve heating furnace of temperature homogeneity, by furnace wall 1, bell 15 and embedding, run through a plurality of self-preheating nozzle body 5 inside and outside the wall body and constitute, its characterized in that: two sides of the furnace wall 1 are correspondingly distributed face to face A 、1 B The burner is provided with a plurality of self-preheating burner bodies 5 distributed in a staggered manner and a furnace wall smoke discharge channel inlet 2 positioned in the hearth, so that a glowing air flow outlet of the self-preheating burner bodies 5 arranged on one side of the furnace wall is opposite to the furnace wall smoke discharge channel inlet 2 arranged on the opposite hearth; and a hidden flue gas discharge channel 12 is arranged in each corresponding furnace wall 1 provided with the self-preheating burner body 5.
Further, the hidden flue gas discharge channel 12 is composed of a furnace wall 1 and a flue gas channel outer partition wall 13 on a hearth at the inner side of the front end of the self-preheating burner body 5, a furnace wall flue gas discharge channel inlet 2 is arranged between every two adjacent self-preheating burner bodies 5 on the hidden flue gas discharge channel 12, and the furnace wall flue gas discharge channel inlet 2 and the hidden flue gas discharge channel 12 are communicated with each other.
Further, the two side furnace walls 1 A 、1 B A plurality of rows of self-preheating burner bodies 5 which are distributed in parallel up and down are distributed on the upper part, and hidden flue gas discharge channels 12 between two adjacent self-preheating burner bodies 5 in each row are communicated with each other.
Further, the self-preheating burner body 5 consists of a self-preheating burner flame nozzle 4 arranged at the front end of the self-preheating burner body 5, a self-preheating burner gas inlet 11, a self-preheating burner combustion air inlet 7, a burner ignition device 9 and a flame monitoring device 10 which are arranged at the rear part of the self-preheating burner body 5 and on the burner body positioned at the outer side of a furnace wall, and a self-preheating burner heat exchanger flue gas inlet 14 which is positioned at the tail part of the burner body and is communicated with a hidden flue gas discharge channel 12 and used for conveying high-temperature flue gas is arranged at the front part of the self-preheating burner body 5; the self-preheating burner combustion air inlet 7 is communicated with the combustion air branch pipe 19 and the flame ejection port 22 through the combustion air distribution box 18; the flue gas inlet 8 of the self-preheating burner heat exchanger is communicated with a flue gas discharge pipeline 21 outside the furnace wall through a connecting pipe.
Further, the hidden flue gas discharge channel 12 is communicated with a flue gas inlet 14 of the self-preheating burner heat exchanger arranged around the front nozzle body of the self-preheating burner body 5, and enters a flue gas discharge pipeline 21 outside the whole furnace wall through a self-preheating burner body 5 arranged in the furnace wall 1, which is exposed outside the furnace wall, and a self-preheating burner flue gas discharge outlet 8 communicated with the inner cavity of the self-preheating burner body 5.
The heating furnace chamber capable of improving the temperature uniformity heats the workpiece in the furnace and discharges the smoke as follows:
1) Multiple furnace wall self-preheating burner 5A arranged on two side furnace walls 1 1-N After ignition, the flue gas from the flame ejection port 22 enters the inner cavity of the whole hearth to uniformly heat the workpiece 3 arranged in the whole hearth;
2) Under the pushing of the subsequent hot smoke continuously flowing in from the flame spraying port 22, the forward smoke enters the hidden smoke discharge channel 12 which is communicated with the furnace wall and is arranged in the furnace wall through the furnace wall smoke discharge channel inlet 2 arranged on the inner wall surface of the hearth at the other side of the corresponding surface;
3) Under the further pushing of the continuously-flowing subsequent hot smoke, the smoke enters the hidden smoke discharge channel 12 to enter the corresponding self-preheating burner 5B 1-N Is passed through the self-preheating burner 5B, and is provided with a self-preheating burner fume discharge inlet 14 1-N In the realization of the heat exchanger of the self-preheating burner 5B 1-N Preheating combustion air and discharging the preheated combustion air into the side furnace wall 1 A An outer fume discharge duct 21;
4) Simultaneously with it: the flue gas generated by the self-preheating burner body 5 on the other side simultaneously enters the corresponding surface furnace wall 1 B An inlet 2 of a flue gas discharge channel of the upper furnace wall enters the furnace wall 1 arranged at the position through a hidden flue gas discharge channel 12 which is arranged at the position communicated with the inlet 2 of the flue gas discharge channel of the furnace wall A The self-preheating burner body 5 is arranged at the position, and is discharged to a flue gas discharge pipeline 21 after passing through the self-preheating burner heat exchanger.
According to the heating hearth capable of improving temperature uniformity and the self-preheating combustion method thereof, provided by the technical scheme, each heated workpiece arranged in the inner cavity of the furnace body can be uniformly heated through the plurality of groups of self-preheating burner bodies arranged on the corresponding furnace wall surface and the hidden flue gas discharge channel 12 arranged on the hearth between every two adjacent self-preheating burner bodies 5 and composed of the flue gas channel outer partition wall and the furnace wall hidden flue gas discharge channel inlet 2.
The combustion mode has the advantages that the smoke emission is carried out through the hidden smoke exhaust pipeline in the whole furnace wall instead of being concentrated in one smoke exhaust channel, so that the temperature in the furnace is ensured to be very uniform and single, the temperature difference in the furnace is greatly reduced, the heated object is ensured not to be adversely affected by ultrahigh temperature and local low temperature, the heating quality of the heated object is fundamentally improved, and the furnace is particularly suitable for metal reduction high-temperature furnaces of a plurality of reduction tanks. Not only can the service life of the reduction tank be prolonged, but also the metal reduction efficiency can be improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of the internal state of the furnace in operation of the present invention;
FIG. 3 is a schematic view of a horizontal section and a schematic view of the thermal insulation in the operational state of FIG. 2;
FIG. 4 is an enlarged view of a part of the structure of FIG. 3;
FIG. 5 is a cross-sectional view taken along the direction of FIG. 2 A-A;
FIG. 6 is a schematic view of a self-preheating burner body
FIG. 7 is a left side view of FIG. 6;
FIG. 8 is a heating and flue gas conductance diagram.
In the figure:
1-a furnace wall; 1 A -a furnace wall; 1 B -a furnace wall;
2-a flue gas discharge channel inlet of the furnace wall;
3-a heated workpiece;
4-self-preheating burner flame nozzle;
5-self-preheating burner body;
6-flow direction of flue gas in the furnace is a streamline;
7-a self-preheating burner combustion air inlet;
8-a self-preheating burner flue gas discharge outlet;
9-a burner ignition device;
10-flame monitoring device;
11-self-preheating burner gas inlet;
12-hidden flue gas discharge channels;
13-a partition wall outside the flue gas channel;
14-a flue gas inlet of the self-preheating burner heat exchanger;
15-furnace cover;
16-cushion blocks;
17-a lightweight insulating material;
18-a combustion air distribution box;
19-combustion air branch pipes;
20-a ceramic insulating tube;
21-a flue gas discharge pipeline;
22-flame ejection port.
Detailed Description
The invention provides a heating hearth capable of improving temperature uniformity, which has the following core originality: through set up a plurality of self-preheating flame nozzle bodies and corresponding stove wall flue gas emission passageway entry and hidden flue gas emission passageway that each other are dislocation distribution on the face-to-face distribution of heating furnace both sides, make every self-preheating flame nozzle body all carry the hot flue gas of high temperature simultaneously to the furnace in, can in time pass through the stove wall flue gas emission passageway entry and hidden flue gas emission passageway entry of opposite again with the flue gas after having heated the work piece and discharge the furnace, let whole furnace inner chamber be in controllable time all the time and be in high temperature environment, accomplish the heating to the work piece in the stove.
The invention is further elucidated below in conjunction with the drawings of the description and examples of the invention are given. Such a heating chamber as shown in fig. 1-5 can improve temperature uniformity.
The heating hearth capable of improving temperature uniformity consists of a furnace wall 1, a furnace cover 15 and a plurality of self-preheating nozzle bodies 5 which are embedded and penetrate through the inside and the outside of the wall body, and is characterized in that: two sides of the furnace wall 1 are correspondingly distributed face to face A 、1 B The burner is provided with a plurality of self-preheating burner bodies 5 distributed in a staggered manner and a furnace wall smoke discharge channel inlet 2 positioned in the hearth, so that a glowing air flow outlet of the self-preheating burner bodies 5 arranged on one side of the furnace wall is opposite to the furnace wall smoke discharge channel inlet 2 arranged on the opposite hearth; and hidden flue gas is arranged in each corresponding furnace wall 1 provided with the self-preheating burner body 5And a discharge passage 12.
The hidden flue gas discharge channel 12 is composed of a furnace wall 1 and a flue gas channel outer partition wall 13 on a hearth at the inner side of the front end of the self-preheating burner body 5, a furnace wall flue gas discharge channel inlet 2 is arranged between every two adjacent self-preheating burner bodies 5 on the hidden flue gas discharge channel 12, and the furnace wall flue gas discharge channel inlet 2 and the hidden flue gas discharge channel 12 are communicated with each other.
The two sides of the furnace wall 1 A 、1 B A plurality of self-preheating burner bodies 5 which are distributed in parallel up and down are distributed on the upper part, and hidden smoke discharging channels 12 between every two adjacent self-preheating burner bodies 5 are communicated with each other.
In practical application, the number of lines of the self-preheating burner bodies 5 arranged on the furnace walls at two sides can be determined by the volume of the hearth, the volume of the hearth is large, and particularly, the hearth with larger depth can be provided with a plurality of layers of self-preheating burner bodies.
FIGS. 5 and 6 show specific construction diagrams of the self-preheating burner body 5 applied to the heating hearth capable of improving temperature uniformity according to the present invention; fig. 7 shows a schematic view of a specific structure of a flame ejection port at the front of the self-preheating burner body 5.
The self-preheating burner body 5 shown in the figure consists of a self-preheating burner flame nozzle 4 arranged at the front end of the self-preheating burner body 5, a self-preheating burner gas inlet 11, a self-preheating burner combustion air inlet 7 and a burner ignition device 9 and a flame monitoring device 10 which are arranged on the burner body outside a furnace wall and positioned at the rear part of the self-preheating burner body 5, and a self-preheating burner heat exchanger flue gas inlet 14 which is communicated with a hidden flue gas discharge channel 12 and used for conveying high-temperature flue gas is arranged at the front part of the self-preheating burner body 5; the self-preheating burner combustion air inlet 7 is communicated with the combustion air branch pipe 19 and the flame ejection port 22 through the combustion air distribution box 18; the flue gas inlet 8 of the self-preheating burner heat exchanger is communicated with a flue gas discharge pipeline 21 outside the furnace wall through a connecting pipe.
The principle of operation of such a self-preheating burner body 5 as described above is as follows:
the fuel gas and the combustion air are respectively arranged on the self-preheating burner body 5 A The self-preheating burner gas inlet 11 and the combustion air branch pipe 19 on the rear shell are sprayed into a hearth at a flame spraying port 22 at the front part of the self-preheating burner body 5 after being ignited by an ignition burner ignition device 9, and heat treatment is carried out on a workpiece 3 arranged in the hearth; then under the effect of continuously spraying flame from the flame spraying port 22 at the front part of the self-preheating burner body 5 to the hearth, the high-temperature flue gas which enters the hearth earlier and is used for baking the workpiece is discharged from the flue gas discharge channel inlet 2 of the furnace wall arranged on the opposite hearth; and enters the self-preheating burner body 5 arranged on the opposite hearth through a hidden flue gas discharge channel 12 communicated with the inlet 2 of the flue gas discharge channel of the furnace wall B A hidden flue gas discharge channel 12 communicated with the hidden flue gas discharge channel 12 arranged in the opposite hearth, which is used for leading the heated high-temperature flue gas to flow from the opposite self-preheating burner body 5 B Is introduced from a high-temperature flue gas inlet around the self-preheating burner flame nozzle 4 and finally from the self-preheating burner body 5 B The tail self-preheating burner fume discharge outlet 8 is discharged into the self-preheating burner body 5 B A connected flue gas discharge duct 21.
FIG. 8 shows a schematic diagram of the operation of the entire heating chamber with improved temperature uniformity, and can also be considered as self-preheating burner 5A from multiple walls within the entire heating chamber 1-N Schematic diagram of overall combustion process after ignition combustion:
multiple furnace wall self-preheating burner 5A arranged on one side furnace wall 1 1-N After combustion, the flue gas 6 generated by combustion is led from the self-preheating burner flue gas discharge port 8 to enter through the furnace wall flue gas discharge channel inlet 2 on the inner wall surface of the furnace wall 1 at the other side of the corresponding surface, and enters the corresponding self-preheating burner 5B through the hidden flue gas discharge channel 12 communicated with the hidden flue gas discharge channel inlet 2 1-N Is passed through the self-preheating burner 5B, and is provided with a self-preheating burner fume discharge inlet 14 1-N In the realization of the heat exchanger of the self-preheating burner 5B 1-N PreheatingThe combustion air is discharged into the side furnace wall 1 A An outer fume discharge duct; likewise, the flue gas generated by the self-preheating burner body 5 on the other side simultaneously enters the corresponding surface furnace wall 1 B An inlet 2 of a flue gas discharge channel of the upper furnace wall enters the furnace wall 1 arranged at the position through a hidden flue gas discharge channel 12 which is arranged at the position communicated with the inlet 2 of the flue gas discharge channel of the furnace wall A The self-preheating burner body 5 is arranged at the position, and is discharged to a flue gas discharge pipeline 21 after passing through the self-preheating burner heat exchanger.
The fuel gas and the combustion air respectively enter the self-preheating burner 5 through a fuel gas inlet 11 and a combustion air inlet 7 of the self-preheating burner, high-temperature flame generated by combustion enters the furnace through a flame nozzle 4 of the self-preheating burner, and an object 3 to be heated is heated; the generated smoke flow is in the flow direction indicated by the flow direction schematic streamline 6, so that most smoke enters the smoke inlet 2 of the hidden smoke discharging channel 12, enters the burner heat exchanger inlet 14 on the opposite side furnace wall 1 through the hidden smoke discharging channel 12, and part of the smoke generated by the burner is driven by the high-speed smoke negative pressure of the burner of the opposite side furnace wall, bypasses the channel between heated objects and the smoke of the opposite burner to be mixed and enters the smoke inlet 2 of the hidden smoke discharging channel 12 adjacent to the burner, and enters the smoke inlet of the burner heat exchanger of the opposite side furnace wall together with the smoke of the opposite burner; so that the flow of the high-temperature flue gas in the furnace in different areas of the furnace body enables the temperature in the furnace to be uniform.
The practical experiment shows that: the technical scheme can obviously improve the uniformity of the temperature in the furnace and prevent the problems of local overheating and low heating temperature. Not only ensures the heating quality of the heated object and reduces the heating cost; the method can be popularized to heating furnaces, soaking furnaces and heat treatment in the steel industry; magnesium reduction furnaces in the colored industry; glass industry; heating furnaces in the ceramic kiln industry, and the like. The optimal method for improving the temperature uniformity in the furnace is provided for users, and has great economic benefit.
The foregoing is merely exemplary of the basic embodiments of the invention that the applicant may set forth in accordance with this technical solution, and any modifications, which may be made by one of ordinary skill in the art, without any substantial intention with reference to this technical solution should be considered as falling within the scope of the present invention.
Claims (8)
1. The utility model provides a can improve heating furnace of temperature homogeneity, comprises furnace wall (1), bell (15) and a plurality of self-preheating nozzle body (5) of embedding, and run through the wall body inside and outside, its characterized in that: two sides of the furnace wall (1) are correspondingly distributed in a group of face-to-face manner A 、1 B ) The burner is provided with a plurality of self-preheating burner bodies (5) which are distributed in a staggered manner and a furnace wall smoke discharge channel inlet (2) which is positioned in the hearth, so that a glowing air flow outlet of the self-preheating burner bodies (5) arranged on one side of the furnace wall is opposite to the furnace wall smoke discharge channel inlet (2) arranged on the opposite hearth; and hidden flue gas discharge channels (12) are arranged in the corresponding furnace walls (1) provided with the self-preheating burner bodies (5).
2. A heating furnace capable of improving temperature uniformity as set forth in claim 1, wherein: the hidden type flue gas discharge channel (12) consists of a furnace wall (1) and a flue gas channel outer partition wall (13) on a hearth at the inner side of the front end of the self-preheating type burner body (5), a furnace wall flue gas discharge channel inlet (2) is arranged between every two adjacent self-preheating type burner bodies (5) on the hidden type flue gas discharge channel (12), and the furnace wall flue gas discharge channel inlet (2) and the hidden type flue gas discharge channel (12) are communicated with each other.
3. A heating furnace capable of improving temperature uniformity as set forth in claim 1, wherein: the two sides furnace wall (1) A 、1 B ) A plurality of rows of self-preheating burner bodies (5) which are distributed in parallel up and down are distributed on the upper part, and hidden flue gas discharge channels (12) between every two adjacent rows of self-preheating burner bodies (5) are communicated with each other.
4. A heating furnace capable of improving temperature uniformity as set forth in claim 1, wherein: the self-preheating burner body (5) consists of a self-preheating burner flame nozzle (4) arranged at the front end of the self-preheating burner body (5), a self-preheating burner gas inlet (11) arranged at the rear part of the self-preheating burner body (5) and positioned on the burner body outside a furnace wall, a self-preheating burner combustion air inlet (7), a burner ignition device (9) and a flame monitoring device (10) positioned outside a self-preheating burner heat exchanger flue gas inlet (8) at the tail part of the burner body, and a self-preheating burner heat exchanger flue gas inlet (14) which is communicated with a hidden flue gas discharge channel (12) and used for conveying high-temperature flue gas is arranged at the front part of the self-preheating burner body (5); the self-preheating burner combustion air inlet (7) is communicated with the combustion air branch pipe (19) and the flame ejection port (22) through the combustion air distribution box (18); the flue gas inlet (8) of the self-preheating burner heat exchanger is communicated with a flue gas exhaust pipeline (21) outside the furnace wall through a connecting pipe.
5. A heating furnace capable of improving temperature uniformity as set forth in claim 1, wherein: the hidden type flue gas discharge channel (12) is communicated with a flue gas inlet (14) of the self-preheating burner heat exchanger arranged around the front end nozzle body of the self-preheating burner body (5), and enters a flue gas discharge pipeline (21) outside the whole furnace wall through a self-preheating burner flue gas discharge outlet (8) which is arranged in the furnace wall (1) and is exposed outside the furnace wall of the self-preheating burner body (5) and communicated with the inner cavity of the self-preheating burner body (5).
6. A heating furnace capable of improving temperature uniformity as set forth in claim 1, wherein: the self-preheating burner body (5) consists of a self-preheating burner flame nozzle (4) arranged at the front end of the self-preheating burner body (5), a self-preheating burner gas inlet (11) arranged at the rear part of the self-preheating burner body (5) and positioned on the burner body outside a furnace wall, a self-preheating burner combustion air inlet (7), a burner ignition device (9) and a flame monitoring device (10) positioned outside a self-preheating burner heat exchanger flue gas inlet (8) at the tail part of the burner body, and a self-preheating burner heat exchanger flue gas inlet (14) which is communicated with a hidden smoke discharging channel (12) and used for conveying high-temperature flue gas is arranged at the front part of the self-preheating burner body (5); the self-preheating burner combustion air inlet (7) is communicated with the combustion air branch pipe (19) and the flame ejection port (22) through the combustion air distribution box (18); the flue gas inlet (8) of the self-preheating burner heat exchanger is communicated with a flue gas exhaust pipeline (21) outside the furnace wall through a connecting pipe.
7. A heating furnace capable of improving temperature uniformity as set forth in claim 1, wherein: the hidden type flue gas discharge channel (12) is communicated with a flue gas inlet (14) of the self-preheating burner heat exchanger arranged around the front end nozzle body of the self-preheating burner body (5), and enters a flue gas discharge pipeline (21) outside the whole furnace wall through a self-preheating burner flue gas discharge outlet (8) which is arranged in the furnace wall (1) and is exposed outside the furnace wall of the self-preheating burner body (5) and communicated with the inner cavity of the self-preheating burner body (5).
8. A heating furnace capable of improving temperature uniformity as claimed in claims 1-7, wherein: the combustion and discharge processes of the heat treatment furnace chamber capable of improving the temperature uniformity are as follows:
1) Multiple furnace wall self-preheating burners (5A) arranged on two side furnace walls (1) 1-N ) After ignition, the hot smoke from the flame jet (22) enters the inner cavity of the whole hearth, so that the uniform heat treatment of the workpiece (3) arranged in the whole hearth is realized;
2) Under the pushing of the subsequent hot smoke continuously flowing in from the flame spraying port (22), the forward smoke enters the communicated hidden smoke discharge channel (12) through a furnace wall smoke discharge channel inlet (2) arranged on the inner wall surface of the hearth at the other side of the corresponding surface;
3) Under the further pushing of the continuously-flowing subsequent hot smoke, the smoke entering the hidden smoke discharging channel (12) enters the corresponding self-preheating burner (5B) 1-N ) Is passed through the self-preheating burner flue gas discharge inlet (14) of the self-preheating burner (5B 1-N ) Is used for realizing the heat exchanger of the self-preheating burner (5B 1-N ) The combustion air is preheated and then discharged into the side furnace wall (1) A ) An outer fume discharge pipe (21);
4) Simultaneously with it: flue gas generated by the self-preheating burner body (5) at the other side simultaneously enters the corresponding surface furnace wall (1) B ) An inlet (2) of a flue gas discharge channel of the upper furnace wall and enters the furnace wall (1) arranged at the position through a hidden flue gas discharge channel (12) which is arranged at the position and communicated with the inlet (2) of the flue gas discharge channel of the furnace wall A ) The self-preheating burner body (5) passes through the self-preheating burner heat exchanger and is discharged to a flue gas discharge pipeline (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311364413.3A CN117537614A (en) | 2023-10-20 | 2023-10-20 | Heating hearth capable of improving temperature uniformity and self-preheating combustion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311364413.3A CN117537614A (en) | 2023-10-20 | 2023-10-20 | Heating hearth capable of improving temperature uniformity and self-preheating combustion method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117537614A true CN117537614A (en) | 2024-02-09 |
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ID=89794803
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311364413.3A Pending CN117537614A (en) | 2023-10-20 | 2023-10-20 | Heating hearth capable of improving temperature uniformity and self-preheating combustion method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117537614A (en) |
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2023
- 2023-10-20 CN CN202311364413.3A patent/CN117537614A/en active Pending
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