CN211373225U - Ignition heat-preservation preheating system based on low-calorific-value gas - Google Patents
Ignition heat-preservation preheating system based on low-calorific-value gas Download PDFInfo
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- CN211373225U CN211373225U CN201921891137.5U CN201921891137U CN211373225U CN 211373225 U CN211373225 U CN 211373225U CN 201921891137 U CN201921891137 U CN 201921891137U CN 211373225 U CN211373225 U CN 211373225U
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- 238000004321 preservation Methods 0.000 title claims abstract description 149
- 238000010438 heat treatment Methods 0.000 claims abstract description 53
- 238000005245 sintering Methods 0.000 claims abstract description 48
- 238000002485 combustion reaction Methods 0.000 claims abstract description 25
- 239000000446 fuel Substances 0.000 claims description 44
- 230000000087 stabilizing effect Effects 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 12
- 230000005855 radiation Effects 0.000 claims description 12
- 239000003381 stabilizer Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 4
- 239000003034 coal gas Substances 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 15
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 56
- 230000000694 effects Effects 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000002349 favourable effect Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000003491 array Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 230000001502 supplementing effect Effects 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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Abstract
An ignition heat-preservation preheating system based on low-calorific-value gas comprises an ignition section and a heat-preservation preheating section according to the running direction of a sintering machine trolley; an ignition device is arranged in the ignition section and is positioned above the sintering machine trolley; a preheating heat exchanger and a heat-preservation burner are arranged in the heat-preservation preheating section, and the preheating heat exchanger and the heat-preservation burner are arranged above the sintering trolley; the system also includes a low heating value gas conduit; and a low-heating-value gas pipeline or a combustion air pipeline is connected to the preheating heat exchanger for heat exchange and then connected to the ignition device. The utility model provides a technical scheme, ignition inserts low heat value coal gas and burns, can effectively carry furnace's temperature value for the heat that low heat value coal gas burning produced satisfies the standard of igniteing to the sintering material, effectively utilizes low heat value coal gas, reduces environmental pollution, reduction enterprise manufacturing cost.
Description
Technical Field
The utility model relates to a system is preheated to hybrid, concretely relates to system is preheated in ignition heat preservation based on low heat value coal gas belongs to sintering device technical field.
Background
The ignition furnace is ignition equipment of a sintering production process and is used for providing high-temperature banded flames to the surface of a mixture on a sintering machine trolley, and the mixture is sintered from top to bottom under the action of air draft. The ignition temperature of the ignition furnace is directly related to the ignition effect and the quality of the sintered mineral product. The ignition furnace using low heat value gas, such as blast furnace gas, as fuel has a theoretical ignition temperature of only 1000 ℃, cannot meet production requirements, and needs preheating and heat supplementing measures to raise the ignition temperature by raising the temperature of air or gas entering the ignition furnace.
The traditional onboard preheating mode is generally that a heat exchanger is additionally arranged at the heat preservation section of an ignition furnace, the radiant heat of the ignition furnace and the charge level is adopted, or a single preheating furnace device is additionally arranged to preheat air or coal gas, and the ignition and charge level waste heat radiation preheating mode is adopted, so that the temperature is increased in a limited way after preheating, and the effect is not ideal. In addition, the mode of preheating by adopting a single preheating furnace device consumes more coal gas, can not recycle the waste heat of the charge level, and the high-temperature flue gas generated by fuel combustion is not reasonably utilized.
Taking blast furnace gas as an example, the ignition temperature is 600-700 ℃, the gas is difficult to ignite in an open space, and the gas can not be directly used for heat supply combustion without a closed combustion chamber. After the blast furnace gas is ignited, when the ambient temperature is lower than 700 ℃, the combustion is unstable, the fire is easy to be extinguished, and the safety is poor.
In the prior art, the following defects exist:
1. the mode of additionally arranging a heat exchanger in the heat preservation section of the ignition furnace to recover the radiation waste heat of the ignition furnace and the charge level has limited preheating temperature increase, large temperature gradient of the heat preservation section and low heat exchange efficiency, and is difficult to effectively increase the ignition temperature.
2. The mode of preheating by adopting a single preheating furnace device consumes more coal gas, needs more equipment and devices, has large investment, heavy equipment, complex pipelines and difficult arrangement, needs a closed and independent combustion chamber for low-calorific-value blast furnace gas and heat supply, and lacks reasonable utilization of high-temperature flue gas generated by fuel combustion.
3. The low-calorific-value blast furnace gas has high ignition temperature, cannot be stably combusted under the working condition of open space and larger induced draft airflow influence, and cannot be directly used for heat compensation of a heat preservation section hearth.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects of the prior art, the utility model can effectively improve the heat value of the low heat value gas, so that the heat generated by the combustion of the low heat value gas meets the standard of ignition of the sintering material, and the quality of the sintering material of the whole sintering machine is effectively ensured; the heating efficiency of the heating section is further improved, low-calorific-value gas is effectively utilized, the environmental pollution is reduced, and the production cost of enterprises is reduced. The utility model provides an ignition heat-preservation preheating system based on low-heat value gas, which comprises an ignition section and a heat-preservation preheating section according to the running direction of a sintering pallet; an ignition device is arranged in the ignition section and is positioned above the sintering machine trolley; a preheating heat exchanger and a heat-preservation burner are arranged in the heat-preservation preheating section, and the preheating heat exchanger and the heat-preservation burner are arranged above the sintering trolley; the system also includes a low heating value gas conduit; the low heating value gas pipeline is connected to the preheating heat exchanger for heat exchange and then connected to the ignition device.
According to the utility model discloses an embodiment provides an ignition heat preservation system of preheating based on low calorific value coal gas:
an ignition heat-preservation preheating system based on low-calorific-value gas comprises an ignition section and a heat-preservation preheating section according to the running direction of a sintering machine trolley; an ignition device is arranged in the ignition section and is positioned above the sintering machine trolley; a preheating heat exchanger and a heat-preservation burner are arranged in the heat-preservation preheating section, and the preheating heat exchanger and the heat-preservation burner are arranged above the sintering trolley; the system also includes a low heating value gas conduit; and a low-heating-value gas pipeline or a combustion air pipeline is connected to the preheating heat exchanger for heat exchange and then connected to the ignition device.
Preferably, the system further comprises a flame holder; the flame stabilizer is arranged on the outer side of the heat-preservation combustor and surrounds the burner of the heat-preservation combustor.
Preferably, the system further comprises a baffle; the guide plate is arranged in the heat-preservation preheating section and is positioned between the sintering machine trolley and the heat-preservation combustor.
Preferably, the heat-retaining burner includes: the burner comprises a burner body, a heat-preservation flame jet and a fuel inlet; the burner body is arranged on the inner side wall of the heat-preservation preheating section; the heat-preservation flame jet is arranged on the burner body and communicated with the interior of the heat-preservation preheating section; the fuel inlet of the heat-insulating combustor is communicated with a low-heating value gas pipeline.
Preferably, the low-calorific-value gas pipeline or the combustion air pipeline is connected to the preheating heat exchanger and is subjected to heat exchange, and the fuel (air) subjected to heat exchange is connected to a fuel (air) inlet of the ignition device through a preheating fuel (air) pipeline; a branch is divided from the low-heat value gas pipeline and is used as a preheating fuel branch, and the preheating fuel branch is connected to a fuel inlet of the heat-preservation combustor.
Preferably, the system further comprises: a temperature measuring device for the heat preservation pre-section; the temperature measuring device of the heat preservation pre-section is arranged in the heat preservation pre-heating section.
Preferably, the system further comprises: ignition section temperature measuring device: the ignition section temperature measuring device is arranged in the ignition section.
Preferably, the flame holder is of a cylinder structure, and a flame holding wire is arranged in the flame holder.
Preferably, the flame stabilizing wire is of a metal wire or metal mesh structure.
Preferably, the baffle is arranged below the flame holder; the guide plate is provided with a vent hole.
Preferably, the upper surface of the baffle is provided with a thermal radiation reflecting film.
Preferably, a plurality of the vent hole arrays are provided on the baffle.
In the present application, a furnace cover is provided on a sintering pallet of a sintering machine. The furnace cover is internally provided with a hearth which is divided into a heating section and a heat preservation section. The materials are heated on the sintering trolley through the ignition section and then are subjected to heat preservation in the heat preservation section; wherein, the ignition section is provided with a flame projecting device of the ignition device; and a preheating heat exchanger is arranged above the heat preservation section, and the preheating heat exchanger preheats fuel or combustion air of the ignition device by utilizing radiant heat of the sintering material entering the heat preservation section. In the scheme of this application, ignition inserts low heat value coal gas and burns, can effectively carry furnace's temperature value for the heat that low heat value coal gas burning produced satisfies the standard of igniteing to the sintering material, effectively utilizes low heat value coal gas, reduces environmental pollution, reduction enterprise manufacturing cost.
It should be noted that, in the prior art, the ignition furnace generally consists of an ignition section and a heat preservation section, a conventional mechanical preheating ignition furnace using low-calorific value blast furnace gas as fuel is used, and only the heat exchanger is arranged on the heat preservation section or the preheating furnace is arranged at the rear section of the ignition furnace separately for preheating. The ignition furnace structure of the mixed preheating process keeps consistent with the traditional ignition furnace, the ignition furnace consists of an ignition section and a heat preservation section with certain length, the heat preservation section is designed into a mixed preheating structure only by utilizing the part of the heat preservation section, and the radiation heat and the external heat supplement of the ignition furnace are comprehensively recycled. The mixed preheating structure consists of a preheating heat exchanger of a heat preservation section, a heat preservation combustor and a flame stabilizing guide pipe. The heat source of the mixed preheating mainly has 2 aspects, namely self heat radiation generated by ignition of an ignition furnace and heat radiation of a high-temperature charge level after ignition, and external heat source heat compensation provided by a combustor and taking low-calorific-value gas as fuel.
The low-heat value gas pipeline is firstly led into the preheating heat exchanger for heat exchange and then led into the heat-insulating combustor for combustion. The heat preservation combustor is arranged in the heat preservation section, the temperature in the heat preservation section is adjusted by utilizing the heat generated by combusting the low-calorific-value blast furnace gas, and the condition that the temperature is too low in the heat preservation section is prevented, so that the quality of the sintering material of the whole sintering machine is effectively ensured. Meanwhile, the heat preservation burner heats and preserves heat of the heat preservation section, and can further heat heating fuel or combustion air in the preheating heat exchanger, so that the heating efficiency of the ignition section is further improved.
The preheating process principle is as follows: the mixture on the trolley continues to move forward after finishing ignition in the heating section, the metal heat exchanger is preheated by high-temperature radiant heat of the heating section and the mixture surface, meanwhile, the heat-preservation combustor of the heat-preservation section adopts the blast furnace gas with low calorific value to provide an external heat source, the stable combustion of the blast furnace gas in an open space is controlled through the flame-stabilizing guide pipe, the heat exchanger is heated, and the purpose of improving the preheating temperature is achieved. The opening of the valve is adjusted through the burner, and the heat supplement amount of an external heat source is controlled, so that the preheating temperature is controlled. The heat-preservation burner is arranged on the side surface of the hearth, the sprayed air and coal gas mixed gas directly enters the charge level after the high-temperature flue gas generated by combustion in the flame stabilizing guide pipe is utilized, cold air suction can be effectively reduced, the edge effect generated by air draft sintering is improved, and the heat-preservation burner is favorable for the quality of sintering ores.
In the application, the heat-preservation burner specifically comprises a burner body, and the low-calorific-value blast furnace gas enters the burner through a low-calorific-value gas pipeline. The heat preservation flame jet port sprays out low-heat value blast furnace gas and oxygen-containing gas, the low-heat value blast furnace gas is ignited to generate flame, the flame enters the inside of the heat preservation section, and the sintering material in the heat preservation section is subjected to heat preservation and heating.
In this application, the temperature in the heat-insulating section measured by the temperature measuring device in the heat-insulating preheating section is TReal insurancePassing through the target holding temperature TEye protectorComparing to see whether the actual temperature in the heat preservation section meets the requirement of the target heat preservation temperature or not, thereby carrying out heat preservationThe burner is adjusted accordingly.
In this application, the temperature that the section temperature measuring device that ignites surveyed in the heating section is the T real and adds, through adding with target heating temperature Ttarget and carry out the contrast, can know whether the actual temperature in the heating section satisfies target heating temperature's requirement. Thereby making corresponding adjustments to the ignition device.
In this application, through the inside with flame leading-in to the heat preservation section that steady flame pipe can be better, the flame that the heat preservation combustor produced is even to the material heat preservation heating in the heat preservation section.
In this application, steady flame pipe level sets up the afterbody that can be favorable to the leading-in steady flame pipe of flame that the heat preservation combustor produced, can carry out the heat preservation heating to the material in the heat preservation section.
It should be noted that the tail of the flame holding conduit is the end of the flame holding conduit away from the thermal insulation flame outlet.
In this application, the guide plate can effectual dispersion from steady flame pipe spun flame (heat), prevents promptly that the flame that the heat preservation combustor produced from excessively heating the material heat preservation in the heat preservation section.
In this application, the heat radiation reflective film can reflect the flame (heat) sprayed onto the deflector to the preheat heat exchanger above the hold-warm section. The heat-insulating burner is effectively prevented from heating the guide plate inefficiently, the heat generated by burning the low-calorific-value blast furnace gas can be better utilized, and the resource utilization rate is improved.
In this application, the guide plate level sets up and the air vent array sets up, is favorable to evenly arranging the heat that the heat preservation combustor grows.
More specifically, the flame holding guide pipe and the flow guide plate are hung and installed below the metal heat exchanger. The flame stabilizing conduit is a cylinder structure made of heat-resistant steel, the flame stabilizing wire consisting of metal wires or metal nets is arranged in the flame stabilizing conduit, one end of the flame stabilizing conduit is connected with a flame path of the heat supplementing burner, the other end of the flame stabilizing conduit extends into a hearth of the heat preservation section, and the end head and the cylinder body are designed into a porous structure. The lower part of the flame stabilizing guide pipe is provided with a guide plate to reduce the airflow disturbance of a combustion area and prevent the situation that the blast furnace gas is not completely combusted and is pumped away when the main pumping flow speed is too high. The guide plate is made of heat-resistant steel plates and is designed to be of a porous structure, and the opening specification is determined by working conditions. The mixed gas of air and coal gas sprayed by the burner arranged on the side wall starts to burn in the flame stabilizing guide pipe, the incompletely burnt coal gas continues to burn outside the flame stabilizing guide pipe, and finally high-temperature flue gas is formed.
According to an embodiment of the present invention, there is provided an ignition furnace:
an ignition furnace, comprising: the ignition furnace hybrid preheating system comprises a furnace cover, a partition plate, a heating section and a heat preservation section, wherein the ignition furnace hybrid preheating system based on low-heating-value coal gas is adopted in the first embodiment; the furnace cover is arranged above the sintering trolley; the baffle is arranged in the furnace cover, and the inner cavity of the furnace cover is divided into a heating section and a heat preservation section by the baffle; the fire-jet of the ignition device is arranged on the furnace cover of the heating section; the ignition furnace mixed preheating system based on the low-heat value gas is arranged on the furnace cover of the heat insulation section.
In the application, the ignition furnace can combine the combustion characteristics of the low-heat-value blast furnace gas, and the low-heat-value blast furnace gas is independently applied to the heat preservation and heating process of the sintering material of the heat preservation section, so that the sintering material entering the heat preservation section of the ignition furnace is effectively preserved, and the product quality is improved.
It should be further noted that, in the technical scheme related to the application, the heat exchanger is directly heated by using the low-heat value gas as the fuel and utilizing the heat preservation section of the ignition furnace, so that the preheating temperature can be effectively increased; secondly, the ignition and preheating are highly integrated, the equipment design and arrangement are simple, and the investment is low; then, a mixed preheating process combining direct heat supply and charge level radiation preheating is adopted, high-temperature smoke of an external heat source is provided to act on the sintering charge level, the comprehensive utilization efficiency of the heat source is high, the edge effect generated by air draft sintering can be improved, and the sintered mineral content is facilitated; finally, the ignition furnace is more energy-saving and has better ignition effect.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. according to the technical scheme provided by the application, the condition of over-low temperature in the heat preservation section can be prevented, so that the quality of the sintering material of the whole sintering machine is effectively ensured;
2. according to the technical scheme provided by the application, the heating efficiency of the heating section can be improved;
3. the technical scheme provided by the application can enable the heat preservation heating process to be more uniform for heat preservation heating of the sintering material.
Drawings
Fig. 1 is a schematic diagram of the overall structure of the hybrid preheating system of the ignition furnace based on low-heat value gas;
FIG. 2 is a schematic view of the pipeline connection of the hybrid preheating system of the ignition furnace based on low-heat value gas;
fig. 3 is a schematic structural view of the middle deflector of the present invention.
Reference numerals:
i: an ignition section; II: a heat preservation preheating section; 1: an ignition device; 101: a fuel inlet; 2: preheating a heat exchanger; 3: a heat-preserving burner; 301: a burner body; 302: a thermal insulation flame jet; 303: a fuel inlet; 401: a temperature measuring device for the heat preservation pre-section; 402: an ignition section temperature measuring device; 5: a baffle; 501: a vent hole; 502: a heat radiation reflecting film; 6: a furnace mantle; 7: a partition plate; 8: a heating section; 9: a heat preservation section; 10: a flame stabilizer;
l0: a low heating value gas pipeline; l1: preheating a fuel pipeline; l2: the fuel branch is preheated.
Detailed Description
According to the utility model discloses an embodiment provides an ignition furnace hybrid system of preheating based on low calorific value coal gas:
an ignition heat-preservation preheating system based on low-calorific-value gas comprises an ignition section I and a heat-preservation preheating section II according to the running direction of a sintering machine trolley; an ignition device 1 is arranged in the ignition section I, and the ignition device 1 is positioned above the sintering machine trolley; a preheating heat exchanger 2 and a heat-preservation burner 3 are arranged in the heat-preservation preheating section II, and the preheating heat exchanger 2 and the heat-preservation burner 3 are arranged above the sintering machine trolley; the system also includes a low heating value gas line L0; the low heating value gas pipeline L0 or the combustion air pipeline is connected to the preheating heat exchanger 2 for heat exchange and then connected to the ignition device 1.
Preferably, the system further comprises a flame holder 10; the flame stabilizer 10 is arranged outside the heat-preserving combustor 3 and surrounds the burner of the heat-preserving combustor 3.
Preferably, the system further comprises a baffle 5; and the guide plate 5 is arranged in the heat-preservation preheating section II and is positioned between the sintering machine trolley and the heat-preservation combustor 3.
Preferably, the heat-retaining burner 3 includes: a burner body 301, a heat-insulating flame outlet 302, and a fuel inlet 303; the burner body 301 is arranged on the inner side wall of the heat preservation preheating section II; the heat preservation flame outlet 302 is arranged on the burner body 301, and the heat preservation flame outlet 302 is communicated with the interior of the heat preservation preheating section II; the fuel inlet 303 of the heat-insulating burner 3 is communicated with a low heating value gas pipeline L0.
Preferably, the low heating value gas pipeline L0 or the combustion air pipeline is connected to the preheating heat exchanger 2 for heat exchange, and then the heat exchanged fuel (air) is connected to the fuel inlet 101 or the air inlet of the ignition device 1 through the preheating fuel pipeline L1 (air); the low-heating-value gas pipeline L0 is branched into a preheating fuel branch L2, and the preheating fuel branch L2 is connected to the fuel inlet 303 of the heat-preservation combustor 3.
Preferably, the system further comprises: a temperature-keeping pre-stage temperature-measuring device 401; the heat-preservation pre-section temperature measuring device 401 is arranged in the heat-preservation pre-heating section II.
Preferably, the system further comprises: ignition section temperature measuring device 402: ignition segment temperature measuring device 402 is disposed within ignition segment I.
Preferably, the flame holder 10 is of a cylindrical structure, and a flame holding wire is arranged inside the flame holder 10.
Preferably, the flame stabilizing wire is of a metal wire or metal mesh structure.
Preferably, the baffle 5 is arranged below the flame holder 10; the guide plate 5 is provided with a vent 501.
Preferably, the upper surface of the baffle 5 is provided with a thermal radiation reflecting film 502.
Preferably, a plurality of the ventilation holes 501 are arranged in an array on the baffle 5.
Example 1
An ignition heat-preservation preheating system based on low-calorific-value gas comprises an ignition section I and a heat-preservation preheating section II according to the running direction of a sintering machine trolley; an ignition device 1 is arranged in the ignition section I, and the ignition device 1 is positioned above the sintering machine trolley; a preheating heat exchanger 2 and a heat-preservation burner 3 are arranged in the heat-preservation preheating section II, and the preheating heat exchanger 2 and the heat-preservation burner 3 are arranged above the sintering machine trolley; the system also includes a low heating value gas line L0; the low heating value gas pipeline L0 or the combustion air pipeline is connected to the preheating heat exchanger 2 for heat exchange and then connected to the ignition device 1.
Example 2
Example 1 was repeated except that the system further included a flame holder 10; the flame stabilizer 10 is arranged outside the heat-preserving combustor 3 and surrounds the burner of the heat-preserving combustor 3.
Example 3
Example 2 was repeated except that the system further included a baffle 5; and the guide plate 5 is arranged in the heat-preservation preheating section II and is positioned between the sintering machine trolley and the heat-preservation combustor 3.
Example 4
Example 3 was repeated except that the holding burner 3 included: a burner body 301, a heat-insulating flame outlet 302, and a fuel inlet 303; the burner body 301 is arranged on the inner side wall of the heat preservation preheating section II; the heat preservation flame outlet 302 is arranged on the burner body 301, and the heat preservation flame outlet 302 is communicated with the interior of the heat preservation preheating section II; the fuel inlet 303 of the heat-insulating burner 3 is communicated with a low heating value gas pipeline L0.
Example 5
Example 4 is repeated, except that the low heating value gas pipeline L0 or the combustion air pipeline is connected to the preheating heat exchanger 2 to exchange heat, and then the fuel (or air) after heat exchange is connected to the fuel inlet 101 (or air inlet) of the ignition device 1 through the preheating fuel pipeline L1 (or air pipeline); the low-heating-value gas pipeline L0 is branched into a preheating fuel branch L2, and the preheating fuel branch L2 is connected to the fuel inlet 303 of the heat-preservation combustor 3.
Example 6
Example 5 was repeated except that the system further included: a temperature-keeping pre-stage temperature-measuring device 401; the heat-preservation pre-section temperature measuring device 401 is arranged in the heat-preservation pre-heating section II.
Example 7
Example 6 is repeated except that the system further comprises: ignition section temperature measuring device 402: ignition segment temperature measuring device 402 is disposed within ignition segment I.
Example 8
Example 7 is repeated, except that the flame holder 10 is of a cylindrical structure, and flame holding wires are arranged inside the flame holder 10. The flame stabilizing wire is of a metal wire or metal mesh structure.
Example 9
Example 8 was repeated except that the baffle 5 was placed below the flame holder 10; the guide plate 5 is provided with a vent 501.
Example 10
Example 9 is repeated except that the upper surface of the baffle 5 is provided with a thermal radiation reflecting film 502.
Example 11
Example 10 is repeated except that a plurality of said arrays of ventilation holes 501 are provided in the baffle 5.
Claims (12)
1. An ignition heat-preservation preheating system based on low-calorific-value gas comprises an ignition section (I) and a heat-preservation preheating section (II) according to the running direction of a sintering machine trolley; the method is characterized in that: an ignition device (1) is arranged in the ignition section (I), and the ignition device (1) is positioned above the sintering machine trolley; a preheating heat exchanger (2) and a heat-preservation burner (3) are arranged in the heat-preservation preheating section (II), and the preheating heat exchanger (2) and the heat-preservation burner (3) are arranged above the sintering trolley; the system also comprises a low heating value gas pipeline (L0); the low heating value gas pipeline (L0) or the combustion air pipeline is connected to the preheating heat exchanger (2) for heat exchange and then connected to the ignition device (1).
2. The ignition, heat preservation and preheating system of claim 1, wherein: the system further comprises a flame holder (10); the flame stabilizer (10) is arranged on the outer side of the heat-preservation combustor (3) and surrounds the burner of the heat-preservation combustor (3).
3. The ignition, heat preservation and preheating system of claim 1, wherein: the system further comprises a baffle (5); the guide plate (5) is arranged in the heat-preservation preheating section (II) and is positioned between the sintering machine trolley and the heat-preservation combustor (3).
4. The ignition, heat preservation and preheating system of claim 2, wherein: the system further comprises a baffle (5); the guide plate (5) is arranged in the heat-preservation preheating section (II) and is positioned between the sintering machine trolley and the heat-preservation combustor (3).
5. The ignition, heat preservation, and preheating system of any one of claims 1-4, wherein: the heat-insulating burner (3) comprises: a burner body (301), a heat-insulating flame outlet (302), and a fuel inlet (303); the burner body (301) is arranged on the inner side wall of the heat preservation preheating section (II); the heat-preservation flame outlet (302) is arranged on the burner body (301), and the heat-preservation flame outlet (302) is communicated with the interior of the heat-preservation preheating section (II); the fuel inlet (303) of the heat-preservation combustor (3) is communicated with a low-heating-value gas pipeline (L0).
6. The ignition, heat preservation and preheating system of claim 5, wherein: a low-calorific-value gas pipeline (L0) or a combustion air pipeline is connected to the preheating heat exchanger (2) to exchange heat, and then the heat-exchanged fuel or combustion air is connected to a fuel inlet (101) of the ignition device (1) through a preheating fuel pipeline (L1) or a combustion air pipeline; the low-heating-value gas pipeline (L0) is branched into a preheating fuel branch (L2), and the preheating fuel branch (L2) is connected to a fuel inlet (303) of the heat-preservation combustor (3).
7. The ignition heat-preserving preheating system according to any one of claims 1 to 4 and 6, characterized in that: the system further comprises: a temperature measuring device (401) for a heat preservation pre-section; the heat-preservation pre-section temperature measuring device (401) is arranged in the heat-preservation pre-heating section (II); and/or
The system further comprises: ignition section temperature measuring device (402): the ignition section temperature measuring device (402) is arranged in the ignition section (I).
8. The ignition, heat preservation and preheating system of claim 5, wherein: the system further comprises: a temperature measuring device (401) for a heat preservation pre-section; the heat-preservation pre-section temperature measuring device (401) is arranged in the heat-preservation pre-heating section (II); and/or
The system further comprises: ignition section temperature measuring device (402): the ignition section temperature measuring device (402) is arranged in the ignition section (I).
9. The ignition, heat preservation and preheating system of claim 2, wherein: the flame stabilizer (10) is of a cylinder structure, and flame stabilizing wires are arranged inside the flame stabilizer (10).
10. The ignition, heat preservation and preheating system of claim 9, wherein: the flame stabilizing wire is of a metal wire or metal mesh structure.
11. The ignition, heat preservation and preheating system of claim 4, wherein: the guide plate (5) is arranged below the flame holder (10); the guide plate (5) is provided with a vent hole (501).
12. The ignition, heat preservation and preheating system of claim 11, wherein: a thermal radiation reflecting film (502) is arranged on the upper surface of the guide plate (5); and/or
The vent holes (501) are arranged on the guide plate (5) in an array.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921891137.5U CN211373225U (en) | 2019-11-05 | 2019-11-05 | Ignition heat-preservation preheating system based on low-calorific-value gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921891137.5U CN211373225U (en) | 2019-11-05 | 2019-11-05 | Ignition heat-preservation preheating system based on low-calorific-value gas |
Publications (1)
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| CN201921891137.5U Active CN211373225U (en) | 2019-11-05 | 2019-11-05 | Ignition heat-preservation preheating system based on low-calorific-value gas |
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