CN115677178A - Combustion method of glass kiln - Google Patents
Combustion method of glass kiln Download PDFInfo
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- CN115677178A CN115677178A CN202211482067.4A CN202211482067A CN115677178A CN 115677178 A CN115677178 A CN 115677178A CN 202211482067 A CN202211482067 A CN 202211482067A CN 115677178 A CN115677178 A CN 115677178A
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- 239000011521 glass Substances 0.000 title claims abstract description 145
- 238000009841 combustion method Methods 0.000 title claims abstract description 46
- 239000007921 spray Substances 0.000 claims abstract description 290
- 238000002485 combustion reaction Methods 0.000 claims abstract description 280
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 251
- 239000001257 hydrogen Substances 0.000 claims abstract description 250
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 244
- 210000000481 breast Anatomy 0.000 claims abstract description 36
- 239000000446 fuel Substances 0.000 claims abstract description 36
- 239000006066 glass batch Substances 0.000 claims abstract description 25
- 238000002844 melting Methods 0.000 claims abstract description 23
- 230000008018 melting Effects 0.000 claims abstract description 23
- 239000002803 fossil fuel Substances 0.000 claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims description 51
- 238000010304 firing Methods 0.000 claims description 32
- 239000000463 material Substances 0.000 claims description 17
- 229910052760 oxygen Inorganic materials 0.000 claims description 15
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical group [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 14
- 239000001301 oxygen Substances 0.000 claims description 14
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 150000002431 hydrogen Chemical class 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 238000007670 refining Methods 0.000 claims 2
- 239000011449 brick Substances 0.000 abstract description 14
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 7
- 229910052799 carbon Inorganic materials 0.000 abstract description 7
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 34
- 239000005361 soda-lime glass Substances 0.000 description 28
- 230000000052 comparative effect Effects 0.000 description 25
- 238000006243 chemical reaction Methods 0.000 description 22
- 239000003345 natural gas Substances 0.000 description 15
- 230000002829 reductive effect Effects 0.000 description 10
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 8
- 238000005352 clarification Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000005855 radiation Effects 0.000 description 6
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 229910002092 carbon dioxide Inorganic materials 0.000 description 4
- 239000001569 carbon dioxide Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- HMUNWXXNJPVALC-UHFFFAOYSA-N 1-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]piperazin-1-yl]-2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)N1CCN(CC1)C(CN1CC2=C(CC1)NN=N2)=O HMUNWXXNJPVALC-UHFFFAOYSA-N 0.000 description 1
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- LDXJRKWFNNFDSA-UHFFFAOYSA-N 2-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]ethanone Chemical compound C1CN(CC2=NNN=C21)CC(=O)N3CCN(CC3)C4=CN=C(N=C4)NCC5=CC(=CC=C5)OC(F)(F)F LDXJRKWFNNFDSA-UHFFFAOYSA-N 0.000 description 1
- YLZOPXRUQYQQID-UHFFFAOYSA-N 3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)-1-[4-[2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidin-5-yl]piperazin-1-yl]propan-1-one Chemical compound N1N=NC=2CN(CCC=21)CCC(=O)N1CCN(CC1)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F YLZOPXRUQYQQID-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000005357 flat glass Substances 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002006 petroleum coke Substances 0.000 description 1
- 230000009919 sequestration Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
Images
Classifications
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
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- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
The invention discloses a combustion method of a glass kiln, wherein a side combustion spray gun is arranged on the side wall of a nozzle brick of the glass kiln to heat and clarify glass batch in a molten pool of the glass kiln, fossil fuel is selected as fuel in the side combustion spray gun, a second hydrogen energy combustion spray gun and a third hydrogen energy combustion spray gun are respectively arranged above and below the side combustion spray gun to heat and clarify the glass batch in the molten pool of the glass kiln, and hydrogen is selected as fuel in the hydrogen energy combustion spray gun. The combustion method can increase the flame coverage area, improve the heating and melting efficiency and reduce the consumption of carbon-based fuel, thereby reducing CO in the combustion process 2 The discharge amount of (c); and can also prevent the flame from flying upwards to cause damage to the crown and the breast wall.
Description
Technical Field
The invention relates to the technical field of glass production, in particular to a combustion method of a glass kiln.
Background
The glass enterprises are carbon dioxide emission-increasing households, taking flat glass as an example, the total glass output in 2021 year is 10.2 hundred million weight boxes, the carbon dioxide emission of the whole industry is 2800 ten thousand tons, and the carbon dioxide emission occupancy rate generated by fossil fuel is up to 60%.
The melting step of glass production is one of the most carbon dioxide-emitting processes. The main method for melting the glass batch is to arrange a plurality of fuel spray guns on the side wall or the top of the glass melting furnace at intervals, the fuel spray gun arranged on the side wall is generally called a side-burning spray gun (the side-burning spray gun is arranged between the position of the side wall and the side-burning spray guns and is used for spraying a small furnace level of a combustion improver), the fuel spray gun arranged on the top (such as a crown) is generally called a top-burning spray gun, fuel is sprayed into the glass melting furnace through the spray guns, meets the combustion improver (air or oxygen) sprayed by the small furnace and generates heat through combustion reaction, the generated heat heats and melts the glass batch in the glass melting furnace, and the clarified and uniform glass batch is formed at a certain temperature.
At present, the main fuels adopted in the glass melting process are natural gas, heavy oil, coal tar, petroleum coke powder and coal gas (the coal gas is composed ofCO、H 2 And mixed gas of methane) and the like, and the main chemical compositions of the fuel are two or three elements of C, H and O, wherein the content of C is the highest, and the main product after the fuel is combusted is CO 2 、H 2 O, and the like. To reduce CO 2 The emission can be increased by increasing the combustion efficiency (such as increasing the consumption of combustion improver, or using oxygen to replace air as combustion improver), or by increasing the flue gas treatment efficiency (such as tail end absorption and CO sequestration) 2 Etc.), none of which can fundamentally solve CO 2 The problem of large production, replacement of fossil fuels with green fuels to reduce carbon dioxide emissions is one of the fastest and most efficient ways, and new combustion methods are needed. Although hydrogen is a green clean energy, has high heat value, replaces the traditional fossil fuel, and can reduce CO 2 The amount of production. However, hydrogen is chemically reactive, the flame produced by combustion is short, and the furnace and lance system are easily burnt by simply replacing the existing fossil fuel with hydrogen in the lance system of the existing glass furnace.
Disclosure of Invention
The invention aims to provide a method for reducing CO aiming at the technical defects in the prior art 2 The combustion method of glass kiln with generation quantity is characterized by that on the side wall of nozzle brick of glass kiln a side-burning spray gun is used for heating and clarifying glass batch material in the melting pool of glass kiln, the fuel in the side-burning spray gun is made up by using fossil fuel, and a second hydrogen energy combustion spray gun and a third hydrogen energy combustion spray gun which are respectively added over and under the side-burning spray gun are used for heating and clarifying glass batch material in the melting pool of glass kiln, the fuel in the hydrogen energy combustion spray gun is made up by using hydrogen gas, and the flow rate of fossil fuel in the side-burning spray gun is 50-170Nm 3 The pressure is 0.012-0.02MPa.
A first hydrogen energy combustion spray gun sleeved in the side combustion spray gun is additionally used for heating and clarifying the glass batch in the molten pool of the glass kiln, the gun head of the first hydrogen energy combustion spray gun extends out of the side combustion spray gun and extends to 15-35cm towards the inside of the glass kiln, and the fuel in the first hydrogen energy combustion spray gun isHydrogen gas with a flow rate of 20-60Nm 3 The pressure is 0.005-0.01MPa.
The second hydrogen energy combustion spray gun is arranged 15-20cm above the side combustion spray gun, a gun head of the second hydrogen energy combustion spray gun extends into the glass kiln and faces towards the glass material liquid, the included angle between the second hydrogen energy combustion spray gun and the horizontal direction is 5-15 degrees, the distance between the gun head and the plane where the inner side wall of the breast wall of the glass kiln is located is 20-36cm, and the flow of hydrogen is 30-50Nm 3 The pressure is 0.015-0.025MPa.
The third hydrogen energy combustion spray gun is arranged 10-15cm under the side combustion spray gun, the gun head of the third hydrogen energy combustion spray gun extends into the glass kiln, the distance from the plane of the inner side wall of the breast wall is 20-35cm, and the flow of hydrogen is 20-65Nm 3 H, the pressure is 0.004-0.008MPa;
preferably, the third hydrogen energy combustion spray gun is sleeved with a combustion-supporting medium spray gun, and the gun head of the combustion-supporting medium spray gun extends out of the third hydrogen energy combustion spray gun and extends for 6-11cm towards the inside of the glass kiln;
more preferably, when the combustion-supporting medium is air, the air flow is 5-16Nm 3 H, the pressure is 0.05-0.18MPa; when the combustion-supporting medium is oxygen, the flow rate is 2.5-10Nm 3 H, the pressure is 0.1-0.25MPa; or the combustion-supporting medium spray gun is closed.
Or the third hydrogen energy combustion spray gun is arranged at the position 8-15cm under the side combustion spray gun, the gun head of the third hydrogen energy combustion spray gun extends into the glass kiln, the distance from the plane of the inner side wall of the breast wall is 10-16cm, and the flow of the hydrogen is 50-180Nm 3 H, the pressure is 0.004-0.008MPa;
a plurality of combustion-supporting medium spray guns are sleeved in the third hydrogen energy combustion spray gun, the combustion-supporting medium spray guns are uniformly distributed in the third hydrogen energy combustion spray gun, and the gun head of each combustion-supporting medium spray gun extends out of the third hydrogen energy combustion spray gun and extends outwards for 6-11cm;
preferably, the number of the combustion-supporting medium spray guns is 4-6, and when the combustion-supporting medium is air, the air flow rate of each combustion-supporting medium spray gun is 5-16Nm 3 H, the pressure is 0.05-0.18MPa; when the combustion-supporting medium is oxygen, the flow rate of each combustion-supporting medium spray gun is 2.5-10Nm 3 H, the pressure is 0.1-0.25MPa; or the combustion-supporting medium lance is closed.
A fourth hydrogen energy combustion spray gun is arranged at a position 30-45cm below the side combustion spray gun, the gun head of the fourth hydrogen energy combustion spray gun extends into the glass kiln, the distance from the plane of the inner side wall of the breast wall is 8-12cm, the fourth hydrogen energy combustion spray gun is additionally used for heating and clarifying the glass batch in the molten pool of the glass kiln, the fuel is hydrogen, and the flow rate of the hydrogen is 20-30Nm 3 H is the ratio of the total weight of the catalyst to the total weight of the catalyst. The flow rate of the second hydrogen energy combustion spray gun is 90-150Nm 3 The pressure is 0.015-0.025MPa.
Two third hydrogen energy combustion spray guns are symmetrically arranged at the oblique lower part of each side combustion spray gun along the length direction of the kiln, the distance between each third hydrogen energy combustion spray gun and each side combustion spray gun in the vertical direction is 10-20cm, the gun head of each third hydrogen energy combustion spray gun extends into the glass kiln, the distance between each third hydrogen energy combustion spray gun and the corresponding side combustion spray gun in the plane of the inner side wall of the breast wall is 10-16cm, and the flow of hydrogen of each third hydrogen energy combustion spray gun is 20-50Nm 3 The pressure is 0.004-0.008MPa.
Two third hydrogen energy combustion spray guns are symmetrically arranged at the oblique lower part of each side combustion spray gun along the length direction of the kiln, the distance between each third hydrogen energy combustion spray gun and each side combustion spray gun in the vertical direction is 10-20cm, the gun head of each third hydrogen energy combustion spray gun extends into the glass kiln, the distance between each third hydrogen energy combustion spray gun and the corresponding side combustion spray gun in the plane of the inner side wall of the breast wall is 10-16cm, and the flow of hydrogen of each third hydrogen energy combustion spray gun is 20-50Nm 3 The pressure is 0.004-0.008MPa.
One or more fifth hydrogen energy combustion spray guns are arranged between two adjacent side combustion spray guns in the kiln, the distance between the gun head of each fifth hydrogen energy combustion spray gun and the plane of the inner side wall of the breast wall, which extends into the glass kiln, is 5-8cm, the fifth hydrogen energy combustion spray guns are used for additionally heating and clarifying the glass batch in the molten pool of the glass kiln, the fuel of each fifth hydrogen energy combustion spray gun is hydrogen, and the flow rate of the hydrogen is 130-220Nm 3 /h；
Preferably, a combustion-supporting medium spray gun is sleeved in the fifth hydrogen energy combustion spray gun, and high-pressure gas is introduced into the combustion-supporting medium spray gun at the pressure of 0.3-0.7MPa;
more preferably, the high pressure gas is high pressure air, and the high pressure air flow rate is 5-16Nm 3 H; or the high-pressure gas is high-pressure oxygen,high pressure oxygen flow 2.5-10Nm 3 H; or the high-pressure gas is high-pressure nitrogen with the flow rate of 2-7Nm 3 /h。
The spray gun system used in the combustion method is obtained by improvement and optimization on the basis of fully utilizing the existing spray gun for introducing fossil fuel, and comprises the steps of additionally arranging a hydrogen energy combustion spray gun in the existing side-burning spray gun and additionally arranging the hydrogen energy combustion spray gun at the upper part and/or the lower part of the existing side-burning spray gun. When the spray gun system is used for combustion, flame sprayed by the side-burning spray gun with the hydrogen energy combustion spray gun added inside is mixed flame of hydrogen flame wrapped by carbon-based fuel (traditional fossil fuel) flame, and the mixed flame forms long flame due to large internal hydrogen pressure, so that the flame coverage area can be increased, the heating and melting efficiency is improved, the consumption of the carbon-based fuel is reduced, and the CO content in the combustion process is reduced 2 The amount of discharge of (c). The flame sprayed by the hydrogen energy combustion spray gun which is additionally arranged at the upper part of the side-burning spray gun and the gun head of which inclines downwards (towards the direction of the glass material liquid) can form a flame curtain to block the long flame below and prevent the flame below from flying upwards to cause the main crown and the breast wall to be damaged. The hydrogen energy combustion spray gun additionally arranged at the lower part of the side-burning spray gun can generate steam during combustion, the steam is attached to the liquid level of the glass feed liquid, the viscosity of the glass feed liquid on the surface can be reduced, the melting of the glass batch and the clarification of the glass feed liquid are accelerated, the fuel consumption is reduced, and the CO in the combustion process is reduced 2 The amount of discharge of (c). In addition, the spray gun system has low cost for the reconstruction of the existing glass kiln.
The hydrogen energy combustion spray gun positioned at the lower part of the side combustion spray gun can increase the amount of combustion improver such as air or oxygen and the like according to specific working conditions, the fuel and the combustion improver in the spray gun are positioned above the liquid level of the relatively closed glass feed liquid, the fuel and the combustion improver can quickly react and burn after being added, the radiation heat transfer of flame to the glass feed liquid is accelerated, and meanwhile, oxidizing flame is generated, which is beneficial to the melting of glass batch. The introduction of the combustion improver can be closed according to specific working conditions, and at the moment, the hydrogen energy fuel sprayed by the hydrogen energy combustion spray gun can absorb the combustion-supporting medium sprayed by the upper side combustion spray gun, so that local reductive flame is formed at the liquid level of the glass batch, and the protection of the reducing agent in the glass batch and the clarification of the glass batch are facilitated.
Drawings
FIG. 1 is a schematic longitudinal sectional view in front elevation showing the structure of a lance system in the combustion method of example 1;
FIG. 2 is a schematic side view showing the structure of a lance system in the combustion method of embodiment 1;
FIG. 3 is a schematic longitudinal sectional view of a structure of a lance system in the combustion method of embodiment 2;
FIG. 4 is a schematic side view showing the structure of a lance system in the combustion method of embodiment 2;
FIG. 5 is a schematic side view showing the structure of a lance system in the combustion method of embodiment 3;
FIG. 6 is a schematic view showing the structure of a conventional glass furnace;
in the figure: 1-side burning a spray gun; 2-combustion-supporting medium spray gun; 31-a first hydrogen-energy combustion lance; 32-a second hydrogen-energy combustion lance; 33-a third hydrogen energy spray gun; 34-a fourth hydraulic spray gun; 35-a fifth hydrogen energy spray gun; 4-breast wall; 5-small furnace; 6-nozzle brick.
Detailed Description
As shown in FIG. 6, the combustion lance system of the prior glass kiln generally comprises a side combustion lance 1 (which is usually positioned at the same horizontal position as the small furnace) arranged in a nozzle brick 6, the nozzle brick 6 is built between a breast wall 4 and a pool wall, and sometimes comprises a top combustion lance arranged at the inner side of a main crown, and traditional fossil fuel (such as methane CH) is introduced into the side combustion lance 1 4 ) The fuel meets combustion improver (air and/or oxygen) introduced into the small furnace at the gun mouth (nozzle) of the gun head to generate combustion reaction to generate flame, and the glass batch is melted into glass feed liquid. The invention improves and optimizes the spray gun system of the existing glass kiln after deeply exploring the operating condition of the current mainstream glass kiln and the combustion mode of the spray gun system, adds the hydrogen energy combustion spray gun on the basis of keeping the original traditional fossil fuel injection gun as far as possible, partially replaces the traditional fossil fuel by the green clean fuel-hydrogen, determines all parameters of the combustion process, such as the type of fuel introduced into each spray gun, the arrangement position of the spray gun, the flow rate and the pressure of the fuel and the like, and finally realizes the effective reduction of CO in the combustion process 2 The amount of hydrogen to be discharged is reduced.
The present invention will be described in more detail with reference to specific examples and will be further described below, but the present invention is not limited to these examples.
Example 1
The combustion method provided by the present embodiment uses a combustion lance system with the following modifications, as shown in fig. 1 and 2:
1. a first hydrogen energy combustion spray gun 31 is additionally arranged in the existing side combustion spray gun 1 (can be horizontally arranged, can also be inclined downwards to enable a gun head to face glass feed liquid, and the included angle between the gun head and the horizontal direction is 3-8 degrees), the first hydrogen energy combustion spray gun 31 is sleeved in the side combustion spray gun 1 (can be coaxial or not), the gun head extends out of the side combustion spray gun 1 and extends outwards for 15-35cm, and the flow rate of the first hydrogen energy combustion spray gun 31 is 20-60Nm 3 H, the pressure is 0.005-0.01MPa; the natural gas flow in the side burning spray gun is 50-170Nm 3 H (the flow of the side-firing lance in the conventional kiln without the hydrogen energy lance is 100-200Nm 3 H) and the pressure is 0.012-0.02MPa. Because hydrogen burning produces steam, steam can take flame to upwards drift toward the big arch direction lighter, mainly through the pressure of controlling hydrogen in first hydrogen can burning spray gun 31 and the pressure of the interior natural gas of side burning spray gun when burning for the flame of first hydrogen can burning spray gun 31 is shorter than the flame of side burning spray gun 1 spun, wraps up the flame of hydrogen burning with the flame of natural gas burning, guarantees that the flame end is the flame that produces by natural gas burning, in order to avoid steam to take the flame drift to burn and to damage the big arch. The side-burning spray gun 1 sprays flame of carbon-based fuel (traditional fossil fuel), hydrogen flame wrapping the first hydrogen energy burning spray gun forms mixed flame, and the mixed flame forms long flame due to large internal hydrogen pressure, so that the flame coverage area can be increased, the breast wall 4 is prevented from being burnt, the heating and melting efficiency is improved, the use amount of the carbon-based fuel is reduced, and CO in the combustion process is reduced 2 The amount of discharge of (c).
2. A second hydrogen energy combustion spray gun 32 (which can be a round pipe as shown in figure 2) with a downward inclined gun head is additionally arranged at the upper part of the side combustion spray gun 1, and the flow rate of hydrogen is 30-50Nm 3 H, pressure 0015-0.025MPa, the second hydrogen energy combustion spray gun 32 is set up in the side and burns the position 15-20cm directly over spray gun 1, with the one-to-one correspondence of side and burning the spray gun position of below, in the same horizon (have no altitude difference in the vertical direction), and stretch out the nozzle brick and extend into the kiln, the length that stretches out is 20-36cm apart from the level where the breast wall is located, the included angle with horizontal direction is 5-15 degrees, the included angle that the second hydrogen energy combustion spray gun 32 sets up and cooperate with distance between the spray guns 1 of side burning, can block the flame of the spray gun 1 of side burning of lower part, prevent the flame from carrying on the bunch upwards, burn and damage crown and breast wall; the effect of preventing the flame from floating upwards is limited when the included angle is too small; the included angle is too large, and the included angle can be crossed with flame generated by a side-burning spray gun below, so that the original state, shape and combustion condition of the flame can be influenced, and the radiation heat transfer of the glass can be influenced; and the air flow generated by the flame with an overlarge included angle can impact the liquid level of the glass feed liquid, disturb the liquid flow of the glass feed liquid and influence the clarification effect of the glass feed liquid.
3. A third hydrogen energy combustion spray gun 33 (which can be horizontally arranged or inclined downwards to enable the gun head to face the glass material liquid and form an included angle of 3-8 degrees with the horizontal direction) is additionally arranged at the lower part of the existing side combustion spray gun 1, the third hydrogen energy combustion spray gun 33 is positioned at the position which is 10-15cm under the side combustion spray gun 1 and corresponds to the position of the side combustion spray gun above the side combustion spray gun one by one, the third hydrogen energy combustion spray gun extends out of a nozzle brick and extends into the kiln, the extending length is 20-35cm away from the plane where the breast wall is positioned, and the flow of hydrogen is 20-65Nm 3 The pressure is 0.004-0.008MPa, and the third hydrogen energy combustion spray gun 33 is closer to the longitudinal distance of the liquid level of the glass material liquid, so that the energy generated by flame combustion is radiated to the glass material liquid, and the radiation heat transfer of the flame to the glass material liquid is accelerated. Meanwhile, a combustion-supporting medium spray gun 2 is additionally arranged in the furnace, the combustion-supporting medium spray gun 2 is sleeved in a third hydrogen energy combustion spray gun 33 (which can be coaxial or non-coaxial), and the third hydrogen energy combustion spray gun 33 extends out to extend 6-11cm into the glass furnace. When in use, the combustion-supporting medium can be filled with air (the flow rate is 5-16 Nm) 3 At a pressure of 0.05-0.18MPa, or oxygen (flow rate of 2.5-10 Nm) 3 At a pressure of 0.1 to 0.25MPa, optionally without introduction of a combustion-supporting medium (flow = 0). When the combustion-supporting medium is introduced into the third hydrogen energy combustion spray gun 33, and H 2 ：O 2 Is less than 2, and an oxidizing flame is generated to contribute to melting of the glassAnd (4) transforming. When the third hydrogen energy combustion spray gun 33 is filled with only hydrogen (without filling combustion-supporting medium) or H 2 ：O 2 When the molar ratio is more than 2, the hydrogen can absorb combustion-supporting media sprayed from a small furnace (a side-burning spray gun) at the upper part, so that a reducing flame is formed at a local position covered by the flame of the third hydrogen energy burning spray gun 33, and the reduction-supporting flame is beneficial to protecting the reducing agent in the glass batch and clarifying the glass feed liquid; that is, the embodiment can select whether to introduce the combustion-supporting medium according to different working conditions, and when the glass feed liquid is in the melting zone of the melting tank, the combustion-supporting medium is introduced; and in the clarification zone, a combustion-supporting medium is not introduced, or the combustion-supporting medium can be not introduced when the reducing agent in the glass batch needs to be protected.
Using the combustion lance system of this example to melt a common soda-lime-silica glass batch to 1580℃, taking a 600t/d glass production line as an example, the first hydrogen-energy combustion lance 31 extends 25cm outward beyond the side-firing lance 1 and the hydrogen flow rate is 40Nm 3 The pressure is 0.008MPa, and the natural gas flow in the side-burning spray gun is up to 80Nm 3 The pressure is 0.016MPa. The hydrogen flow rate of the second hydrogen combustion lance 32 is 40Nm 3 The pressure is 0.02MPa, the side-burning spray gun is arranged at 18cm right above the side-burning spray gun 1 and extends into the glass kiln, the distance from the plane of the inner side wall of the breast wall is 26cm, and the included angle between the horizontal direction and the side-burning spray gun is 10 degrees. The third hydrogen energy combustion spray gun 33 is positioned 10cm under the side combustion spray gun 1 and extends into the glass kiln, the distance from the plane of the inner side wall of the breast wall is 30cm, and the hydrogen flow is 40Nm 3 H, pressure 0.006MPa. The combustion-supporting medium spray gun 2 is not communicated with the combustion-supporting medium. Annual CO 2 The discharge amount is 10.8-12.1 ten thousand tons, and the hydrogen consumption amount is 105.12 ten thousand Nm/year 3 (ii) a And the combustion method and the lance system (using natural gas as fuel) using the existing glass kiln are used for producing CO annually 2 The discharge amount was 14.5 ten thousand tons (1 ten thousand tons of CO) 2 The discharge amount is equivalent to 1000 ten thousand Nm 3 Produced by combustion of natural gas).
Comparative example 1-1: the conventional soda-lime-silica glass batch was melted to 1580 c using the parameters of the combustion method and lance system of example 1 except that the first hydrogen-fired lance 31 was nested within the side-fired lance 1 and extended out of the side-fired lance 1 by 10cm, andthe flow rate of the hydrogen-energy combustion spray gun 31 is 70Nm 3 H, the pressure is 0.008MPa; the fuel (natural gas) flow rate of the side-firing lance was 40Nm 3 The pressure is 0.016MPa, the other conditions are not changed, and the CO for producing 600t glass per day is obtained by conversion 2 The amount discharged was 349 tons/day, and the hydrogen consumption was 2640Nm 3 。
Comparative examples 1 to 2: the ordinary soda-lime-silica glass batch was melted to 1580 c using the combustion method and the parameters of the lance system of example 1, except that the first hydrogen-energy combustion lance 31 was nested inside the side-firing lance 1 and extended out of the side-firing lance 1 by 45cm, and the hydrogen flow rate of the first hydrogen-energy combustion lance 31 was 15Nm 3 H, the pressure is 0.008MPa; fuel (natural gas) flow of side-firing lance to 80Nm 3 The pressure is 0.016MPa, other conditions are not changed, and the CO is converted into the CO for producing 600t of glass per day 2 The discharge amount is 388 tons/day, and the hydrogen consumption is 360Nm 3 。
Comparative examples 1 to 3: the ordinary soda-lime-silica glass batch is melted to 1580 ℃ by using the parameters of the combustion method and the lance system of the example 1, only the second hydrogen energy combustion lance 32 is arranged at a position 10cm right above the side combustion lance 1 and extends into the glass kiln, the distance from the plane of the inner side wall of the breast wall is 26cm, the included angle with the horizontal direction is 10 degrees, and the hydrogen flow rate of the second hydrogen energy combustion lance 32 is 60Nm 3 H, the pressure is 0.02MPa, other conditions are not changed, and the CO for producing 600t of glass per day is obtained by conversion 2 The discharge amount was 364 tons/day, and the hydrogen consumption was 1440Nm 3 。
Comparative examples 1 to 4: the ordinary soda-lime-silica glass batch was melted to 1580 c using the parameters of the combustion method and lance system of example 1 except that the second hydrogen-energy combustion lance 32 was positioned 30cm directly above the side-firing lance 1 and extended into the glass kiln at a distance of 26cm from the plane of the inside wall of the breast wall and an angle of 10 ° to the horizontal, and the hydrogen flow rate of the second hydrogen-energy combustion lance 32 was 20Nm 3 H, the pressure is 0.02MPa, other conditions are unchanged, and the CO for producing 600t glass per day is obtained by conversion 2 The discharge amount is 383 tons/day, and the hydrogen consumption is 480Nm 3 。
Comparative examples 1 to 5: by way of example1, melting the common soda-lime-silica glass batch to 1580 ℃ by using all parameters of a spray gun system, wherein only a second hydrogen energy combustion spray gun 32 is arranged at a position 18cm right above the side combustion spray gun 1 and extends into a glass kiln, the distance from the plane of the inner side wall of a breast wall is 15cm, the included angle between the plane and the horizontal direction is 20 degrees, and the hydrogen flow of the second hydrogen energy combustion spray gun 32 is 40Nm 3 H, the pressure is 0.02MPa, other conditions are not changed, and the CO for producing 600t of glass per day is obtained by conversion 2 The amount of discharged hydrogen was 369 tons/day, and the amount of consumed hydrogen was 960Nm 3 。
Comparative examples 1 to 6: the ordinary soda-lime-silica glass batch was melted to 1580 c using the parameters of the combustion method and lance system of example 1 except that the second hydrogen-energy combustion lance 32 was positioned 18cm directly above the side-firing lance 1 and extended into the glass kiln at a distance of 45cm from the plane of the inside wall of the breast wall and at an angle of 0 ° to the horizontal, and the hydrogen flow rate of the second hydrogen-energy combustion lance 32 was 40Nm 3 H, the pressure is 0.02MPa, other conditions are unchanged, and the CO for producing 600t glass per day is obtained by conversion 2 The amount of discharged gas was 370 tons/day, and the amount of hydrogen consumed was 960Nm 3 。
Comparative examples 1 to 7: the ordinary soda-lime-silica glass batch was melted to 1580 c using the parameters of the combustion method and lance system of example 1 except that the third hydrogen-energy combustion lance 33 was placed 25cm directly below the side-firing lance 1 and extended into the glass kiln at a distance of 45cm from the plane of the inside wall of the breast wall and the hydrogen flow rate of the third hydrogen-energy combustion lance 33 was 10Nm 3 H, the pressure is 0.006MPa, other conditions are unchanged, and CO for producing 600t glass per day is obtained by conversion 2 The amount of discharged gas was 395 ton/day, and the amount of hydrogen consumed was 240Nm 3 。
Comparative examples 1 to 8: the conventional soda-lime-silica glass batch was melted to 1580 ℃ using the combustion method and various parameters of the lance system of example 1, except that the tertiary hydrogen combustion lance 33 was placed 5cm directly below the side-firing lance 1 and extended 10cm outward beyond the lance, and the hydrogen flow rate of the tertiary hydrogen combustion lance 33 was 80Nm 3 H, the pressure is 0.006MPa, other conditions are unchanged, and the CO is converted to produce 600t glass per day 2 The discharge amount is 355 tons/day, and the hydrogen consumption is1920Nm 3 。
Comparative examples 1 to 9: the conventional soda-lime-silica glass batch was melted to 1580 c using the parameters of the combustion method and lance system of example 1 except that the third hydrogen-energy combustion lance 33 was positioned 10cm directly below the side-firing lance 1 and extended 30cm outward beyond the nozzle block, and the hydrogen flow rate of the third hydrogen-energy combustion lance 33 was 40Nm 3 The pressure is 0.002MPa, the pressure of the second hydrogen energy combustion spray gun 32 is 0.01MPa, the pressure of the first hydrogen energy combustion spray gun 31 is 0.002MPa, other conditions are unchanged, and CO for producing 600t glass per day is obtained by conversion 2 The amount of discharged gas was 367 tons/day, and the amount of hydrogen consumed was 960Nm 3 。
Comparative examples 1 to 10: the ordinary soda-lime-silica glass batch is melted to 1580 ℃ by using the parameters of the combustion method and the spray gun system of the embodiment 1, and only the pressure of the first hydrogen energy combustion spray gun 31 is 0.02MPa, the pressure of the second hydrogen energy combustion spray gun 32 is 0.04MPa, the pressure of the third hydrogen energy combustion spray gun 33 is 0.01MPa, the pressure of natural gas in the side combustion spray gun is 0.016MPa, and other conditions are unchanged, so that the CO for producing 600t glass per day is obtained by conversion 2 The discharge amount is 341 tons/day, and the hydrogen consumption amount is 2880Nm 3 。
Example 2
The combustion process provided in this example uses a combustion lance system similar to that of example 1, except for the following modifications, as shown in figures 3 and 4:
1. in the existing side-firing spray gun 1 (the natural gas flow in the side-firing spray gun is 50-170 Nm) 3 A third hydrogen energy combustion spray gun 33 (which can be horizontally arranged or inclined downwards to enable the gun head to face the glass material liquid and form an included angle of 3-8 degrees with the horizontal direction and can be long strip-shaped as shown in figure 4) is additionally arranged at the lower part of the chamber with the pressure of 0.012-0.02MPa, the third hydrogen energy combustion spray gun 33 is positioned at 8-15cm under the side combustion spray gun 1, the gun head can extend into the glass kiln, the distance from the plane of the inner side wall of the breast wall can be 10-16cm, and the flow of hydrogen is 50-180Nm 3 The pressure is 0.004-0.008MPa, and the third hydrogen energy combustion spray gun 33 is closer to the longitudinal distance of the liquid level of the glass material liquid, so that the energy generated by flame combustion is radiated to the glass material liquid, and the radiation heat transfer of the flame to the glass material liquid is accelerated. At the same time, a combustion-supporting medium is added in the interior of the combustion-supporting chamberThe combustion-supporting medium spray guns 2 are equidistantly and horizontally arranged and sleeved (the shaft of each combustion-supporting medium spray gun 2 and the shaft of the third hydrogen energy combustion spray gun 33 can be positioned at the same horizontal position or different horizontal positions) in the third hydrogen energy combustion spray gun 33 and are parallel to the third hydrogen energy combustion spray gun 33, and the third hydrogen energy combustion spray gun 33 is extended out to extend 5-10cm into the glass kiln. When in use, the combustion-supporting medium can be filled with air (the flow rate is 5-16 Nm) 3 At a pressure of 0.05-0.18MPa, or oxygen (flow rate of 2.5-10 Nm) 3 At a pressure of 0.1 to 0.25MPa, optionally without introduction of a combustion-supporting medium (flow = 0). When the combustion-supporting medium is introduced into the third hydrogen energy combustion spray gun 33, and H 2 ：O 2 The molar ratio of (1) is less than 2, and an oxidizing flame is generated, which is beneficial to the melting of the glass. When the third hydrogen energy combustion spray gun 33 is filled with only hydrogen (without filling combustion-supporting medium) or H 2 ：O 2 When the molar ratio is more than 2, the hydrogen can absorb combustion-supporting media sprayed from an upper small furnace (at a side-burning spray gun), so that a reducing flame is formed at a local position covered by the flame of the third hydrogen energy burning spray gun 33, and the reduction-supporting flame is beneficial to protecting the reducing agent in the glass batch and clarifying the glass feed liquid; that is, the embodiment can select whether to introduce the combustion-supporting medium according to different working conditions, and when the glass feed liquid is in the melting zone of the melting tank, the combustion-supporting medium is introduced; and when the glass batch is positioned in the clarification zone, a combustion-supporting medium is not introduced, or the combustion-supporting medium can not be introduced when the reducing agent in the glass batch needs to be protected.
2. A third hydrogen energy combustion spray gun 34 (which can be arranged horizontally or inclined downwards so that the gun head faces the glass material liquid, the included angle between the gun head and the horizontal direction is 3-8 degrees and can be strip-shaped as shown in figure 4) is additionally arranged on the pool wall at the lower part of the third hydrogen energy combustion spray gun 33, the fourth hydrogen energy combustion spray gun 34 is positioned at the position of 30-45cm at the lower part of the existing side combustion spray gun 1, the gun head can extend into the glass kiln, the distance between the gun head and the plane of the inner side wall of the breast wall can be 8-12cm, and the hydrogen flow is 20-30Nm 3 The pressure is 0.01-0.02MPa, holes are formed at the lower part of the existing nozzle brick, the flame condition between flame and the glass feed liquid is further increased, the heat transfer to the glass feed liquid is further increased, and the viscosity of the glass feed liquid is reduced.
3. The existing side-burning spray gun 1 is additionally provided with a gun at the upper partA second downwardly inclined hydrogen-fired lance 32 (which may be in the form of an elongate strip as shown in figure 4) having a hydrogen flow rate of 90 to 150Nm 3 The pressure is 0.015-0.025MPa, the second hydrogen energy combustion spray gun 32 is arranged at a position which is 10-20cm above the side combustion spray gun 1 and is positioned at the same horizontal position (namely, no height difference exists in the vertical direction), the second hydrogen energy combustion spray gun 32 extends out of the nozzle brick and extends into the kiln, the gun head of the second hydrogen energy combustion spray gun can extend into the glass kiln, the distance from the plane of the inner side wall of the breast wall can be 6-10cm, and the included angle between the gun head and the horizontal direction is 5-15 degrees; the included angle of the second hydrogen energy combustion spray gun 32 is matched with the distance between the side combustion spray guns 1, so that the flame of the side combustion spray gun 1 at the lower part can be blocked, and the flame is prevented from flying upwards to cause damage to the crown and the breast wall; the effect of preventing the flame from floating upwards is limited when the included angle is too small; the included angle is too large, and the included angle can be crossed with flame generated by a side-burning spray gun below, so that the original state, shape and burning condition of each flame are influenced, and the radiation heat transfer to the glass is influenced; and the air flow generated by the flame with an overlarge included angle can impact the liquid level of the glass feed liquid, disturb the liquid flow of the glass feed liquid and influence the clarification effect of the glass feed liquid.
Taking a 600t/d glass production line as an example, the combustion spray gun system of the embodiment is used for melting the common soda-lime-silica glass batch to 1580 ℃, wherein the third hydrogen energy combustion spray gun 33 is positioned 10cm under the side combustion spray gun 1, and the flow of hydrogen is 100Nm 3 H, pressure 0.006MPa. The combustion-supporting medium spray gun 2 is not communicated with the combustion-supporting medium. The fourth hydrogen energy combustion spray gun 34 is positioned at the lower part 40cm of the existing side combustion spray gun 1, and the hydrogen flow is 25Nm 3 H, pressure 0.015MPa. The flow rate of hydrogen in the second hydrogen-energy combustion lance 32 is 120Nm 3 The pressure is 0.02MPa, the second hydrogen energy combustion spray gun 32 is arranged at the position 15cm right above the side combustion spray gun 1, and the included angle between the second hydrogen energy combustion spray gun and the horizontal direction is 10 degrees. Annual CO 2 The amount of discharge was 10.2 to 11.1 ten thousand tons, and the amount of hydrogen consumption was 214.62 ten thousand Nm 3 (ii) a And the combustion method and the lance system (using natural gas as fuel) using the existing glass kiln are used for producing CO annually 2 The discharge amount was 14.5 ten thousand tons.
Comparative example 2-1: the ordinary soda-lime-silica glass batch was melted to 1580 ℃ using the combustion method and various parameters of the lance system of example 2, except that the fourthThe hydrogen energy combustion spray gun 34 is arranged at a position 20cm under the side combustion spray gun 1, and the hydrogen flow is 40Nm 3 The pressure is 0.015MPa, other conditions are not changed, and the CO for producing 600t glass per day is obtained by conversion 2 The discharge amount is 358 tons/day, and the hydrogen consumption is 1680Nm 3 The day is.
Comparative example 2-2: the ordinary soda-lime-silica glass batch was melted to 1580 c using the combustion method and lance system parameters of example 2, except that the fourth hydraulic combustion lance 34 was placed 55cm directly below the side-firing lance 1 and the hydrogen flow was 10Nm 3 The pressure is 0.015MPa, other conditions are not changed, and the CO for producing 600t glass per day is obtained by conversion 2 The discharge amount was 393 tons/day, and the hydrogen consumption was 240Nm 3 The day is one.
Comparative examples 2 to 3: the ordinary soda-lime-silica glass batch was melted to 1580 ℃ using the combustion method and parameters of the lance system of example 2, except that the second hydrogen-energy combustion lance 32 was placed 5cm directly above the side-firing lance 1, the angle to the horizontal was 0 °, and the hydrogen flow rate of the second hydrogen-energy combustion lance 32 was 180Nm 3 H, the pressure is 0.02MPa, other conditions are not changed, and the CO for producing 600t of glass per day is obtained by conversion 2 The discharge amount is 331 tons/day, and the hydrogen consumption amount is 4320Nm 3 The day is.
Comparative examples 2 to 4: the ordinary soda-lime-silica glass batch was melted to 1580 c using the parameters of the combustion method and lance system of example 2 except that the second hydrogen-energy combustion lance 32 was placed 30cm directly above the side-firing lance 1 at an angle of 20 degrees to the horizontal, and the hydrogen flow rate of the second hydrogen-energy combustion lance 32 was 60Nm 3 H, the pressure is 0.02MPa, other conditions are unchanged, and the CO for producing 600t glass per day is obtained by conversion 2 The amount of discharged hydrogen was 363 tons/day, and the amount of consumed hydrogen was 1440Nm 3 The day is.
Comparative examples 2 to 5: the conventional soda-lime-silica glass batch was melted to 1580 c using the combustion method and the parameters of the lance system of example 2, except that the third hydrogen-energy combustion lance 33 was placed 25cm directly below the side-firing lance 1 and the hydrogen flow rate of the third hydrogen-energy combustion lance 33 was 30Nm 3 H, the pressure is 0.006MPa, other conditions are unchanged, and the CO is converted to produce 600t glass per day 2 Discharge capacity375 ton/day hydrogen consumption is 720Nm 3 The day is.
Comparative examples 2 to 6: the conventional soda-lime-silica glass batch was melted to 1580 c using the combustion method and the parameters of the lance system of example 2, except that the third hydrogen-energy combustion lance 33 was placed 5cm directly below the side-firing lance 1 and the hydrogen flow rate of the third hydrogen-energy combustion lance 33 was 210Nm 3 H, the pressure is 0.006MPa, other conditions are unchanged, and CO for producing 600t glass per day is obtained by conversion 2 The discharge amount is 320 tons/day, and the hydrogen consumption amount is 5040Nm 3 The day is.
Comparative examples 2 to 7: the ordinary soda-lime-silica glass batch is melted to 1580 ℃ by using the parameters of the combustion method and the spray gun system in the embodiment 2, and only the pressure of the third hydrogen energy combustion spray gun 33 is 0.002MPa, the pressure of the second hydrogen energy combustion spray gun 32 is 0.01MPa, the pressure of the fourth hydrogen energy combustion spray gun 34 is 0.005MPa, other conditions are not changed, and the CO for producing 600t glass per day is obtained by conversion 2 The emission was 315 tons/day, and the hydrogen consumption was 5880Nm 3 The day is one.
Example 3
The combustion process provided in this example uses a combustion lance system similar to that of examples 1 and 2, except for the following modifications, as shown in fig. 5:
1. side burning spray guns 1 (the natural gas flow in the side burning spray guns is 50-170 Nm) arranged on the two sides of each small furnace 5 on the side wall of the nozzle brick of the existing glass kiln 3 Pressure of 0.012-0.02 MPa) is usually two, two third hydrogen energy combustion spray guns 33 (which can be horizontally arranged or inclined downwards so that the gun heads face the glass material liquid and the included angle with the horizontal direction is 3-8 degrees, and can be long-strip-shaped as shown in figure 5) are symmetrically distributed and additionally arranged along the length direction of the furnace (namely the flowing direction of the glass material liquid) at the oblique lower part of each side combustion spray gun 1 respectively, so that the two third hydrogen energy combustion spray guns 33 and the side combustion spray guns 1 form an isosceles triangle with the side combustion spray guns 1 as the vertexes; two sides of the small furnace 5 are respectively provided with a side burning spray gun 1, so that the third hydrogen energy burning spray guns 33 are provided with four, the four third hydrogen energy burning spray guns 33 are all on the same horizontal line, the vertical distance between the horizontal line and the side burning spray guns 1 is 10-20cm, and the gun heads can extend into the glass kiln and are away from the breastThe distance between the planes of the inner wall and the inner wall of the wall can be 10-16cm, and the hydrogen flow in the third hydrogen energy combustion spray gun 33 is 20-50Nm 3 H, pressure 0.004-0.008MPa.
2. In the same way as in example 2, a second hydrogen-energy combustion lance 32 (which is long as shown in FIG. 5 and is also shown in FIG. 4) with a downwardly inclined lance head is additionally arranged at the upper part of the conventional side-firing lance 1, and the flow rate of hydrogen is 90-150Nm 3 The pressure is 0.015-0.025MPa, and the second hydrogen energy combustion spray gun 32 is arranged at a position which is 10-20cm above the side combustion spray gun 1 and is positioned at the same horizontal position (namely, no height difference exists in the vertical direction); the second hydrogen energy combustion spray gun 32 extends out of the nozzle brick and extends into the kiln, the extending length is 20-36cm away from the plane where the breast wall is located, the included angle between the extending length and the horizontal direction is 5-15 degrees, the included angle formed by the second hydrogen energy combustion spray gun 32 is matched with the distance between the second hydrogen energy combustion spray gun and the side combustion spray gun 1, the flame of the side combustion spray gun 1 at the lower part can be blocked, and the flame is prevented from flying upwards to form a cluster to burn a crown and the breast wall; the effect of preventing the flame from floating upwards is limited when the included angle is too small; the included angle is too large, and the included angle can be crossed with flame generated by a side-burning spray gun below, so that the original state, shape and combustion condition of the flame can be influenced, and the radiation heat transfer of the glass can be influenced; and the air flow generated by the flame with an overlarge included angle can impact the liquid level of the glass feed liquid, disturb the liquid flow of the glass feed liquid and influence the clarification effect of the glass feed liquid.
3. Two side-firing spray guns 1 are respectively arranged on two sides of each small furnace 5 of the existing glass kiln, so that two adjacent side-firing spray guns 1 exist between the two small furnaces (see fig. 5). A fifth hydrogen energy combustion spray gun 35 (which can be horizontally arranged or inclined downwards to enable the gun heads to face the glass material liquid and have an included angle of 3-8 degrees with the horizontal direction) is additionally arranged between two adjacent side combustion spray guns 1 and distributed in a plurality of rows and a plurality of lines (4 rows and 2 rows are shown in figure 5), the interval of each row is 15-25cm, the gun heads can extend into the glass kiln, the distance from the plane of the inner side wall of the breast wall can be 5-8cm, and the hydrogen flow is 130-220Nm 3 H, pressure 0.05-0.1MPa. Meanwhile, a combustion-supporting medium spray gun 2 is additionally arranged at the position of the gun core (the same as the embodiment 1), the combustion-supporting medium spray gun 2 is sleeved inside a fifth hydrogen energy combustion spray gun 35 (the flame length can be coaxial or non-coaxial), the main function is to increase the flame length, the coverage area of the flame is increased, and the flame combustion-supporting medium spray gun is arranged between two pairs of small flame spray gunsThe position without flame in the middle of the furnace is added with hydrogen energy combustion flame, so that the uniformity of glass feed liquid can be improved, and the melting speed and quality of glass can be improved. The combustion-supporting medium spray gun 2 is a high-pressure gas spray gun, the pressure is generally 0.3-0.7MPa, and the combustion-supporting medium can be air (the dosage is 5-16 Nm) 3 H), or oxygen (in an amount of 2.5-10 Nm) 3 H), high-pressure nitrogen can be introduced into the combustion-supporting medium spray gun, the flame rigidity is increased by utilizing the high pressure of the nitrogen, the flame is elongated, and the nitrogen flow is 2-7Nm 3 /h。
Taking a 600t/d glass production line as an example, the combustion spray gun system of the embodiment is used for melting the common soda-lime-silica glass batch to 1580 ℃, wherein the vertical distance between the third hydrogen energy combustion spray gun 33 and the side combustion spray gun 1 in the vertical direction is 15cm, and the hydrogen flow in the third hydrogen energy combustion spray gun 33 is 35Nm 3 H, pressure 0.004-0.008MPa. The flow rate of hydrogen in the second hydrogen-energy combustion lance 32 is 120Nm 3 The pressure is 0.02MPa, the second hydrogen energy combustion spray gun 32 is arranged at the position 15cm above the side combustion spray gun 1 and extends out of the nozzle brick for 28cm, and the included angle between the second hydrogen energy combustion spray gun and the horizontal direction is 10 degrees. The fifth hydrogen-energy combustion spray guns 35 are distributed in two rows, the interval between the two rows is 20cm, and the hydrogen flow is 170Nm 3 H, pressure 0.08MPa. The combustion-supporting medium spray gun 2 is not filled with combustion-supporting medium or nitrogen. Annual CO 2 The discharge amount is 9.5-10.3 ten thousand tons, and the annual hydrogen consumption amount is 284.7 ten thousand Nm 3 (ii) a And the combustion method and the lance system (using natural gas as fuel) using the existing glass kiln are used for producing CO annually 2 The discharge amount was 14.5 ten thousand tons.
Comparative example 3-1: the normal soda-lime-silica glass batch was melted to 1580 c using the combustion method and the parameters of the lance system of example 3, except that the vertical distance between the third hydrogen-energy combustion lance 33 and the side-firing lance 1 was 5cm, and the hydrogen flow rate was 60Nm 3 H, the pressure is 0.002MPa, other conditions are not changed, and CO for producing 600t glass per day is obtained by conversion 2 The discharge amount was 360.5 tons/day, and the hydrogen consumption was 1440Nm 3 The day is.
Comparative example 3-2: the normal soda-lime-silica glass batch was melted to 1580 ℃ using the combustion method and parameters of the lance system of example 3, except that the third hydrogen-energy combustion lanceThe vertical distance between the 33 and the side-firing spray gun 1 in the vertical direction is 30cm, and the hydrogen flow rate is 10Nm 3 H, pressure 0.01MPa, and other conditions are unchanged, and CO for producing 600t glass per day is obtained by conversion 2 The amount of discharged hydrogen was 390 tons/day, and the amount of consumed hydrogen was 240Nm 3 The day is.
Comparative examples 3 to 3: the ordinary soda-lime-silica glass batch was melted to 1580 ℃ using the combustion method and various parameters of the lance system of example 3, except that the second hydrogen-energy combustion lance 32 was placed 5cm directly above the side-firing lance 1 and extended 45cm outward beyond the nozzle brick, with an angle of 0 ° to the horizontal, and the hydrogen flow rate of the second hydrogen-energy combustion lance 32 was 180Nm 3 H, the pressure is 0.02MPa, other conditions are unchanged, and the CO for producing 600t glass per day is obtained by conversion 2 The discharge amount was 329 tons/day, and the hydrogen consumption was 4320Nm 3 The day is.
Comparative examples 3 to 4: the ordinary soda-lime-silica glass batch was melted to 1580 ℃ using the combustion method and various parameters of the lance system of example 3, except that the second hydrogen-energy combustion lance 32 was placed 30cm directly above the side-firing lance 1 and extended 15cm outward beyond the nozzle brick, with an angle of 20 ° to the horizontal, and the hydrogen flow rate of the second hydrogen-energy combustion lance 32 was 60Nm 3 H, the pressure is 0.02MPa, other conditions are unchanged, and the CO for producing 600t glass per day is obtained by conversion 2 The discharge amount was 358 tons/day, and the hydrogen consumption was 1440Nm 3 The day is.
Comparative examples 3 to 5: the ordinary soda-lime-silica glass batch is melted to 1580 ℃ by using the parameters of the combustion method and the lance system of the embodiment 3, only the pressure of the third hydrogen energy combustion lance 33 is 0.002MPa, the pressure of the second hydrogen energy combustion lance 32 is 0.01MPa, the pressure of the fifth hydrogen energy combustion lance 35 is 0.08MPa, and other conditions are not changed, so that the CO for producing 600t glass per day is obtained by conversion 2 The discharge amount is 303 tons/day, and the hydrogen consumption amount is 7800Nm 3 The day is one.
Comparative examples 3 to 6: the conventional soda-lime-silica glass batch was melted to 1580 c using the combustion method and lance system parameters of example 3 except that the pressure of the third hydrogen-fired lance 33 was 0.02MPa, the pressure of the second hydrogen-fired lance 32 was 0.04MPa and the pressure of the fifth hydrogen-fired lance 35 was 0.08MPaMPa, and other conditions are unchanged, and the CO for producing 600t glass per day is obtained by conversion 2 The amount of discharged hydrogen was 293 tons/day, and the hydrogen consumption was 7800Nm 3 The day is.
Comparative examples 3 to 7: the ordinary soda-lime-silica glass batch was melted to 1580 ℃ using the parameters of the combustion method and lance system of example 3, except that the fifth hydrogen-energy combustion lance 35 was distributed in two rows, spaced 10cm apart, with a hydrogen flow rate of 100Nm 3 H, pressure 0.08MPa, and other conditions are unchanged, and CO for producing 600t glass per day is obtained by conversion 2 The amount of discharged hydrogen was 346 tons/day, and the amount of consumed hydrogen was 2400Nm 3 The day is.
Comparative examples 3 to 8: the conventional soda-lime-silica glass batch was melted to 1580 ℃ using the parameters of the combustion method and lance system of example 3, except that the fifth hydrogen-energy combustion lance 35 was distributed in two rows, spaced 30cm apart, with a hydrogen flow rate of 250Nm 3 H, pressure 0.08MPa, and other conditions are unchanged, and CO for producing 600t glass per day is obtained by conversion 2 The discharge amount is 312 tons/day, and the hydrogen consumption is 6000Nm 3 The day is.
The foregoing is only a preferred embodiment of the invention and it should be noted that modifications and embellishments could be made by those skilled in the art without departing from the principle of the invention and should also be considered as the content of the invention.
Claims (10)
1. A combustion method of a glass kiln is characterized in that a second hydrogen energy combustion spray gun and a third hydrogen energy combustion spray gun which are respectively and additionally arranged above and below the side combustion spray gun are used for heating and clarifying the glass batch in the melting bath of the glass kiln, the fuel in the hydrogen energy combustion spray gun is selected from hydrogen, and the flow of the fossil fuel in the side combustion spray gun is 50-170Nm 3 The pressure is 0.012-0.02MPa.
2. The method of combustion as set forth in claim 1,the method is characterized in that a first hydrogen energy combustion spray gun sleeved in the side combustion spray gun is additionally used for heating and clarifying the glass batch in the molten pool of the glass kiln, the gun head of the first hydrogen energy combustion spray gun extends out of the side combustion spray gun and extends to 15-35cm towards the interior of the glass kiln, the fuel in the first hydrogen energy combustion spray gun is hydrogen, and the flow of the hydrogen is 20-60Nm 3 The pressure is 0.005-0.01MPa.
3. The combustion method according to claim 1 or 2, wherein the second hydrogen energy combustion spray gun is arranged 15-20cm above the side combustion spray gun, a gun head of the second hydrogen energy combustion spray gun extends into the glass kiln and faces to the glass material liquid, an included angle between the second hydrogen energy combustion spray gun and the horizontal direction is 5-15 degrees, the distance between the gun head and a plane where the inner side wall of a breast wall of the glass kiln is located is 20-36cm, and the flow rate of hydrogen is 30-50Nm 3 The pressure is 0.015-0.025MPa.
4. A combustion process according to any one of claims 1 to 3 wherein the third hydrogen-energy combustion lance is located within the range of from 10 to 15cm directly below the side-firing lance and has a tip extending into the glass furnace at a distance of from 20 to 35cm from the plane of the inner side wall of the breast wall and wherein the flow rate of hydrogen is from 20 to 65Nm m 3 H, the pressure is 0.004-0.008MPa;
preferably, the third hydrogen energy combustion spray gun is sleeved with a combustion-supporting medium spray gun, and the gun head of the combustion-supporting medium spray gun extends out of the third hydrogen energy combustion spray gun and extends for 6-11cm towards the inside of the glass kiln;
more preferably, when the combustion-supporting medium is air, the air flow is 5-16Nm 3 H, the pressure is 0.05-0.18MPa; when the combustion-supporting medium is oxygen, the flow rate is 2.5-10Nm 3 H, the pressure is 0.1-0.25MPa; or the combustion-supporting medium spray gun is closed.
5. The combustion process defined in any one of claims 1-3 wherein the third hydrogen-energy combustion lance is positioned 8-15cm directly below the side-firing lance and has its tip extending into the glass furnace at a distance of 10-16cm from the plane of the inner side wall of the breast wall and wherein the flow rate of hydrogen is 50-180Nm 3 H, the pressure is 0.004-0.008MPa;
a plurality of combustion-supporting medium spray guns are sleeved in the third hydrogen energy combustion spray gun, the combustion-supporting medium spray guns are uniformly distributed in the third hydrogen energy combustion spray gun, and the gun heads of the combustion-supporting medium spray guns extend out of the third hydrogen energy combustion spray gun and extend outwards for 6-11cm;
preferably, the number of the combustion-supporting medium spray guns is 4-6, and when the combustion-supporting medium is air, the air flow rate of each combustion-supporting medium spray gun is 5-16Nm 3 H, the pressure is 0.05-0.18MPa; when the combustion-supporting medium is oxygen, the flow rate of each combustion-supporting medium spray gun is 2.5-10Nm 3 H, the pressure is 0.1-0.25MPa; or the combustion-supporting medium lance is closed.
6. The combustion process according to any one of claims 1 to 5, characterized in that a fourth hydrogen-energy combustion lance is arranged 30-45cm below the side-firing lance and extends into the glass furnace at a distance of 8-12cm from the plane of the inner side wall of the breast wall, and the fourth hydrogen-energy combustion lance is used for additionally heating and refining the glass batch in the molten bath of the glass furnace, wherein the fuel is hydrogen and the flow rate of the hydrogen is 20-30Nm 3 /h。
7. The combustion method as claimed in claim 6, wherein the second hydrogen-energy combustion lance is arranged 15-20cm above the side-firing lance, the lance head extends into the glass furnace towards the glass feed liquid, the included angle between the second hydrogen-energy combustion lance and the horizontal direction is 5-15 °, the distance from the lance head to the plane of the inner side wall of the breast wall is 6-10cm, and the flow rate of hydrogen is 90-150Nm 3 The pressure is 0.015-0.025MPa.
8. The combustion method as claimed in any one of claims 1 to 3, wherein two third hydrogen-energy combustion lances are symmetrically arranged obliquely below each side-firing lance along the length of the furnace, the third hydrogen-energy combustion lances are spaced from the side-firing lances by a vertical distance of 10 to 20cm and extend with tips into the glass furnace at a distance of 10 to 16cm from the plane of the inner side wall of the breast wall, and the flow rate of hydrogen gas from the third hydrogen-energy combustion lances is set to be equal to20-50Nm 3 The pressure is 0.004-0.008MPa.
9. The combustion method as claimed in claim 6 or 7, wherein two third hydrogen-energy combustion spray guns are symmetrically arranged along the length direction of the furnace obliquely below each side-burning spray gun, the vertical distance between each third hydrogen-energy combustion spray gun and each side-burning spray gun is 10-20cm, the gun heads of the third hydrogen-energy combustion spray guns extend into the glass furnace, the distance between each third hydrogen-energy combustion spray gun and the plane of the inner side wall of the breast wall is 10-16cm, and the flow rate of hydrogen of the third hydrogen-energy combustion spray guns is 20-50Nm 3 The pressure is 0.004-0.008MPa.
10. The combustion process as claimed in any one of claims 1 to 9, characterized in that one or more fifth hydrogen-energy combustion lances are arranged in the furnace between two adjacent side-firing lances, the tips of which lances extend into the furnace at a distance of 5 to 8cm from the plane of the inner side wall of the breast wall, and the fifth hydrogen-energy combustion lances are used additionally for heating and refining the glass batch in the bath of the glass furnace, the fuel of the fifth hydrogen-energy combustion lances being hydrogen, the flow rate of the hydrogen being 130 to 220Nm 3 /h；
Preferably, a combustion-supporting medium spray gun is sleeved in the fifth hydrogen energy combustion spray gun, high-pressure gas is introduced into the combustion-supporting medium spray gun, and the pressure is 0.3-0.7MPa;
more preferably, the high pressure gas is high pressure air, and the high pressure air flow rate is 5-16Nm 3 H; or the high-pressure gas is high-pressure oxygen with the flow rate of 2.5-10Nm 3 H; or the high-pressure gas is high-pressure nitrogen with the flow rate of 2-7Nm 3 /h。
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