CN102173559A - Method for melting glass using tail gas in coal low-temperature dry distillation production - Google Patents
Method for melting glass using tail gas in coal low-temperature dry distillation production Download PDFInfo
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- CN102173559A CN102173559A CN2011100083316A CN201110008331A CN102173559A CN 102173559 A CN102173559 A CN 102173559A CN 2011100083316 A CN2011100083316 A CN 2011100083316A CN 201110008331 A CN201110008331 A CN 201110008331A CN 102173559 A CN102173559 A CN 102173559A
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000000197 pyrolysis Methods 0.000 title claims abstract description 28
- 239000003245 coal Substances 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 title abstract description 18
- 238000002844 melting Methods 0.000 title abstract description 16
- 230000008018 melting Effects 0.000 title abstract description 16
- 239000003034 coal gas Substances 0.000 claims abstract description 123
- 239000006060 molten glass Substances 0.000 claims abstract description 35
- 238000002485 combustion reaction Methods 0.000 claims abstract description 17
- 239000012716 precipitator Substances 0.000 claims abstract description 12
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims description 132
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 19
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- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 3
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B5/00—Melting in furnaces; Furnaces so far as specially adapted for glass manufacture
- C03B5/16—Special features of the melting process; Auxiliary means specially adapted for glass-melting furnaces
- C03B5/235—Heating the glass
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Melting And Manufacturing (AREA)
Abstract
The invention discloses a method for melting glass by using tail gas in coal low-temperature dry distillation production. The method comprises the following steps of: (1) feeding the tail gas which is collected at the top of a dry distillation coke oven to an electrical tar precipitator for oil removal and purification through a gas collector pipe to form a clean coal gas; (2) allowing the clean coal gas of the step (1) to enter a glass melting furnace through a coal gas pipe which is connected with the glass melting furnace under the pressure applied by a blower, and pushing the clean coal gas to flow through a coal gas exchanger and a coal gas flue in sequence and then enter a coal gas heat storage chamber in which the clean coal gas is heated to 800 DEG C to 1200 DEG C, wherein the pressure applied by the blower is 500 Pa; (3) allowing the heated clean coal gas of the step (2) to enter a small pre-combustion chamber through the top of the coal gas heat storage chamber and mix with the air in the small pre-combustion chamber, transferring the resulting mixture to a molten glass tank and combusting to melt mixed ingredients of glass. The glass melting furnace used in the method is modified based on the existing furnace process using the producer as the fuel, can effectively utilize the tail gas generated during the coal low-temperature dry distillation (blue-coke) production process, the problems of energy waste and environmental pollution due to the tail gas emission can also be solved, and the method is suitable for generalization and application.
Description
Technical field
The present invention relates to a kind of method of molten glass, specifically is a kind of method of utilizing the tail gas molten glass in coal low-temperature pyrolysis (blue charcoal) production.
Background technology
At present in glass production industry, molten glass is fuel used heavy oil, coal tar, refinery coke, Sweet natural gas, producer gas, coke-oven gas, pure oxygen burning and electrofusion.Every kind of fuel is to having different furnace constructions and burning process.In short supply and the crisis along with world energy sources, price of fuel is high, causes enterprise cost higher, and benefit is on the low side, has reduced the market competitiveness of enterprise.
In traditional glass production, adopt the producer gas molten glass usually; Producer gas is the fuel of gasification being made by producer gas generator, need aim at molten glass and outfit equipment.This coal gas is heating gas, and temperature is at 500～550 ℃, and calorific value is low, because this coal gas does not purify, so tar, dust impurity are more, easily stops up regenerator again, influences glass quality.
The method that adopts the coke-oven gas molten glass is also arranged, and this coke-oven gas also need specially be furnished with the pipeline pressure-flow system, uses special-purpose spray gun in glass kiln internal combustion, its calorific value height; But it is low that coal gas is gone into the kiln temperature, the energy consumption height.
By research, the technician finds that the tail gas that produces has combustibility in the production process of coal low-temperature pyrolysis (blue charcoal).The calorific value of this tail gas is than producer gas height, and is lower than coke-oven gas again, about 1800～2200kcal/m
3And this tail gas all was drained in the past and had bled off, and had both caused energy dissipation, environment is produced pollute again.In order to address these problems, have the successful report that is used for magnesium metal smelting behind this exhaust collection in recent years, can reduce smelting cost greatly, realize recycling economy.
Up to now, Shang Wuyou is used for this tail gas the public information report of molten glass.
Summary of the invention
In order to solve the defective that exists in the above-mentioned prior art, reduce the cost of glass melting, the purpose of this invention is to provide a kind of method of utilizing the tail gas molten glass in coal low-temperature pyrolysis (blue charcoal) production process.
To achieve these goals, the present invention adopts following technical scheme: a kind of method of utilizing coal low-temperature pyrolysis tail gas molten glass comprises that step is as follows:
1) destructive distillation coking furnace top accumulative tail gas is sent into the electrical tar precipitator oil removing through an effuser and be cleaned into purified gas;
2) purified gas of step 1) is under the roots blower applied pressure, and the gas line through being connected with glass melter enters in the glass melter, enters gas regenerator internal heating to 800～1200 ℃ successively behind coal gas exchanger and coal gas flue; Wherein, the roots blower applied pressure is 500Pa;
3) step 2) purified gas after the heating enters molten glass pond internal combustion, the molten glass admixtion in the top, gas regenerator enters the port settling chamber and air mixed again.
Above-mentioned steps 1) in, the top of destructive distillation coking furnace offers the mouth of pipe, is welded with pipeline on its mouth of pipe; Be connected by flange between the import of described effuser and this pipeline; Junction at flange is equipped with gasket.
Above-mentioned effuser also will have the step of this effuser being carried out the resistance to air loss bulge test, test pressure P 〉=0.1MPa before feeding tail gas.
Above-mentioned steps 1) used purified gas in, it contains following weight percent composition: CO 18～26%, H
218～26%, CH
46～10%, CO
25.5～6.5%, O
20.2～1.0%, N
235～45%, calorific value is 1800～2200kcal/m
3
Above-mentioned steps 2) coal gas exchanger used in is for jumping the bell-type coal gas exchanger; This import of jumping the bell-type coal gas exchanger is connected with described gas line; Its outlet is provided with three, and its centre exit is the middle flue that flue gas is discharged; The outlet on left and right both sides is respectively left side flue and right side flue, and left side flue and right side flue are communicated with respectively and with the described coal gas flue of its homonymy setting.
Above-mentioned steps 2) in, the observation purge hole of gas regenerator door is provided with 8-15.
The heat exchange material that the grid form is laid is housed in the above-mentioned gas regenerator, and this heat exchange material is low pore schamotte brick.
The side wall inwall of above-mentioned coal gas flue and arch top internal surface all are coated with and are brushed with sealing slurry, and its thickness is 6-20mm; The side wall outside and the arch top outside surface of described coal gas flue are coated with cement layer and thermal insulation coatings layer from the inside to the outside; Wherein, the thickness of cement layer is 20～40mm, and the thickness of thermal insulation coatings layer is 20～40mm; The outer wall of described gas regenerator and outer side of door are coated with described thermal insulation coatings layer, and its thickness is 30～50mm.
Above-mentioned sealing slurry is formed by water glass and the refractory mortar mixed with 1: 1; Above-mentioned thermal insulation coatings layer is the compound silicate insulating paint of paste.
Owing to adopted technique scheme, beneficial effect of the present invention is as follows: 1) glass furnace that uses of the present invention is to do the transformation of carrying out on the kiln technology basis of fuel at former producer gas, can be with by fully utilizing behind the exhaust collection of discharging in coal low-temperature pyrolysis (blue charcoal) production process after the transformation; Reduced facility investment again, realized effective utilization the tail gas of discharging in the above-mentioned blue charcoal production.2) in order to purify the coal gas into stove, the present invention is provided with effuser at the top of destructive distillation coking furnace, and effuser earlier removes oil purification through electrical tar precipitator after with exhaust collection; Purified gas after the purification enters in the glass melter through gas line, coal gas exchanger, coal gas flue, gas regenerator, port settling chamber under the roots blower applied pressure again; Because this coal gas is the cooled coal gas after purifying, the temperature of cooled coal gas is 52～60 ℃ when the coal gas exchanger place, in coal gas flue enters the gas regenerator, after the heat exchange material of grid-like carries out preheating, temperature is heated to 800～1200 ℃, and the coal gas after the heating is discharged by the top, gas regenerator, by the upcast that is connected with the top, gas regenerator, enter in the port settling chamber with after the air mixed and go into glass kiln internal combustion, the molten glass admixtion; 1350～1650 ℃ of high-temperature flue gas that produce are discharged through gas regenerator and coal gas flue, air regenerator and the air flue of this side respectively from the port settling chamber of opposite side again; High-temperature flue gas heats the refractory brick that is used for heat exchange in gas regenerator and the air regenerator simultaneously; Caloric power of gas height through purifying, inclusion-free, clean, help improving glass quality.3) in order to guarantee the sealing effectiveness of glass melter, all will do sealing ply to gas line, coal gas flue, gas regenerator outer wall, wherein, the sealing ply of the side wall inboard of coal gas flue and arch top internal surface is formed by the sealing slurry brushing; The side wall of the coal gas flue outside, and arch top outside surface be coated with the composite bed of cement and thermal insulation coatings from the inside to the outside; The outer wall of gas regenerator and outer side of door are coated with described thermal insulation coatings layer; Simultaneously, reduce the quantity that is provided with of gas regenerator door upper observation hole, reduce false air coefficient, guarantee the security that coal gas is carried; Setting by sealing ply prevents air admission, and coal gas safety in flue is passed through, to guarantee the trouble-free burning in the glass kiln and to satisfy fusing.4) because the heat exchange material in the gas regenerator is the firebrick structure of grid-like, can carry out effective preheating, help improving the charging temperature of coal gas, improve efficiency of combustion the purification coal gas that passes through thus.5) utilize coal low-temperature pyrolysis (blue charcoal) tail gas molten glass, realized combining of two industries of coking and glass production, accomplished the comprehensive utilization of the energy, the energy " coal " realization " is eaten to do and pressed only ".Also solve the energy dissipation and the environmental pollution that cause because of its emptying simultaneously, realized energy-saving and emission-reduction and recycling economy, benefited promotion and implementation.
Description of drawings
Fig. 1 is the process flow sheet of molten glass method of the present invention
Fig. 2 is for realizing the structural representation of glass melter of the present invention
Fig. 3 is that Fig. 2 A-A is to diagrammatic cross-section
Fig. 4 is for jumping the structural representation of bell-type coal gas exchanger
Embodiment
The used coal gas of the present invention is the tail gas in coal low-temperature pyrolysis (blue charcoal) production process, and the gas collection temperature of this tail gas belongs to flammable explosive gas at 80～90 ℃; Main component is as follows: CO 18～26%, H
218～26%, CH
46～10%, CO
25.5～6.5%, O
20.2～1.0%, N
235～45%, calorific value is 1800～2200kcal/m
3Above-mentioned gaseous constituent is measured with formula gas analyzer difficult to understand, and each the component concentration substitution formula that draws after the mensuration calculates this coal gas low heat value, belongs to known prior art.
As shown in Figure 1, utilize the method for the tail gas molten glass in coal low-temperature pyrolysis (blue charcoal) production, comprise that step is as follows:
1) in coaling system IV inputs to coal destructive distillation coking furnace I, the blue charcoal of combustion-supporting processing down at blower fan V, produced simultaneously tail gas is collected at this destructive distillation coking furnace I top, after collecting by an effuser II this tail gas is sent into that oil removing is cleaned into purified gas in the electrical tar precipitator III; Effuser II also needs the step of carrying out the resistance to air loss bulge test, test pressure P 〉=0.1MPa before feeding this tail gas.
2) behind electrical tar precipitator III, be connected with roots blower, and link with gas line.With the purified gas of step 1) under the roots blower applied pressure, enter in the glass melter through the gas line 29 that is connected with glass melter, behind the coal gas flue 6 of a coal gas exchanger 22 and a side, enter gas regenerator 7 internal heating to 800 of homonymy～1200 ℃ successively; Wherein, the roots blower applied pressure is 500Pa.
3) step 2) purified gas after the heating is in 7 tops, gas regenerator enter the port settling chamber 12 of homonymy and air mixed, molten glass pond 31 internal combustion in the middle part of entering again, molten glass admixtion.
Top at destructive distillation coking furnace I offers the mouth of pipe, is welded with pipeline on its mouth of pipe; Be connected with flange between the import of effuser II and this pipeline; Be equipped with gasket at flange connections.
As Fig. 2, shown in Figure 3, on traditional kiln technology basis of doing fuel with producer gas, transform, for reducing investment, utilize original structure as far as possible, but adapt to the requirement that tail gas in coal low-temperature pyrolysis (blue charcoal) production process of being utilized is done fresh fuel again.
Glass melter utilizes existing coal gas 400T/D float glass smelting kiln, its structure comprises: the checker 2 in the air regenerator 1 of both sides and this air regenerator, the air flue 3 of both sides and air branch flue 4, coal gas branch flue 5,5 ', coal gas flue 6,6 ', gas regenerator 7,7 ', gas regenerator checker 8,8 ', the tongue arch 9 of both sides, gas uptake 10 and port arch 11, the port settling chamber 12 of both sides and pool wall 13, the big arch 14 of melting end, the melting end column 15 of both sides, big arch tie rod 16, the wind fire screen wall 17 of both sides, chimney 18, big damper 19, rotation flashboard 20, middle flashboard 21, coal gas exchanger 22, air interchanger 23, molten glass pond 31.
Wherein, the air regenerator 1 of both sides lays respectively at gas regenerator 7,7 ' the outside, gas regenerator 7,7 ' and the air regenerator that is adjacent between be equipped with wind fire screen wall 17, shift to an earlier date mixed firing to avoid coal gas and air; Gas regenerator 7,7 ' respectively by coal gas flue 6,6 ' and about 22 two side flues of coal gas exchanger join.
The same with coal gas system, the air regenerator 1 of both sides, air regenerator checker 2, air flue 3, air branch flue 4 and air interchanger 23 are formed the transfer system of combustion air, to guarantee coal gas fully burning in glass melter.
The pool wall 13 of both sides, the big arch 14 of the melting end at top, the melting end column 15 of both sides, big arch tie rod 16 is formed molten glass pond 31 and melting furnaces, in frit is housed and has melted good glass metal.By chimney 18, big damper 19, rotation flashboard 20, middle flashboard 21, coal gas exchanger 22, air interchanger 23 constitutes the fume exhaust system of glass melter, and its effect is to make the high-temperature flue gas system's discharge thus that is produced in the molten glass process.
Because the tail gas in coal low-temperature pyrolysis (blue charcoal) production process is done fresh fuel, its H
2Content is than the producer gas height, so more inflammable and explosive; But the condition of burning and blast is entrained air and reaches certain concentration, meets naked light and produces burning and blast.
For avoiding entrained air, characteristics of the present invention just are: the outside and arch top surfaces externally and internally in gas line 29, coal gas flue 6,6 ' the side wall, gas regenerator 7,7 ' outer wall and outer side of door are carried out strict sealing, reduce false air coefficient, strengthen the security that coal gas is carried, prevent coal gas combustion explosion in, to guarantee trouble-free burning and satisfied fusing in the glass melting pond by the course of conveying of coal gas flue and gas regenerator.
The concrete operations of sealing are: with water glass and the refractory mortar sealing slurry with 1: 1 mixed pulp, coal gas flue 6,6 ' side wall inboard and coal gas flue 6,6 ' arch top inner surface are brushed, its thickness is 6-20mm; To the careful brushing in place, slit, guarantee sealed air-tight especially; Be coated with at coal gas flue 6,6 ' the side wall outside and coal gas flue 6,6 ' arch top outside surface and be brushed with cement and thermal insulation coatings layer; Wherein, smear one deck cement earlier, its thickness is 20～40mm, and the best is 30mm; Smear one deck thermal insulation coatings layer then on the surface of cement layer again, its thickness is 20～40mm, and the best is 30mm; The quantity of the observation purge hole on the door of gas regenerator reduces 50% than original equipment, is about 8-15; All adopt the thermal insulation coatings layer to carry out thermal-insulating sealing to gas regenerator 7,7 ' outer wall and outer side of door, its smearing thickness is 30～50mm, and the best is that 30mm is thick; Effectively strengthened the security that coal gas is carried.
The used cement of above-mentioned sealing is ordinary Portland cement Po42.5; The thermal insulation coatings layer is the compound silicate insulating paint of paste, directly is applied in the position of desiring thermal-insulating sealing; Compound silicate insulating paint is the commercially available prod, and main physicochemical property is: SiO
2〉=50%, thermal conductivity 0.035W/m.k, cohesive strength (oven dry) 50KPa.Its characteristics are that plasticity-is strong, and thermal conductivity is low, high insulating effect, and cohesive strength is big, and stopping property is strong, easy construction.
Used gas regenerator in the present embodiment, it is of a size of 2000mm * 2522mm * 4221mm; 35 row are housed in the gas regenerator are cancellate low pore schamotte brick and do heat exchange material, the main physical and chemical index of used low pore schamotte brick is: Al
2O
3〉=42%, Fe
2O
3≤ 1.5%, refractoriness 〉=1750 ℃, 0.2MPa, T0.6 refractoriness under load 〉=1470 ℃, apparent porosity≤14%; Leave the slit between its two adjacent bricks, staggered each other between the adjacent two row bricks, layer with layer between parallel each other; Generally speaking, the size that is provided with of gas regenerator will design according to the melting capacity of glass melter, built-inly is cancellate heat exchange material and also can selects according to processing requirement.
Utilize the idiographic flow of fresh fuel molten glass to be: the cooled coal gas after the purification enters coal gas exchanger 22 through gas line 29, enter coal gas flue 6 ' from the right side flue 27 ' of coal gas exchanger 22, coal gas after the bottom that coal gas flue 6 ' is inserted into gas regenerator 7 ' by connected coal gas branch flue 5 ' will purify is sent into, the top of gas regenerator 7 ' connects the port gas uptake 10 of homonymy, go into molten glass pond 31 internal combustion, the molten glass admixtion after the air mixed that coal gas enters with air regenerator 1 top by homonymy in port gas uptake 10 enters the port settling chamber 12 of homonymy; At this moment, 1350～1650 ℃ of high-temperature flue gas that produce enter gas regenerator 7 and air regenerator 1 with its homonymy from the port settling chamber 12 in left side, coal gas branch flue 5 by 7 bottoms, gas regenerator enters coal gas flue 6 again, enters air flue 3 and the flue gas of discharging through air interchanger 23 crosses at this by coal gas exchanger 22, middle flashboard 21 backs with from the air regenerator 1 bottom air branch flue 4 of homonymy again; Its flue gas is discharged from chimney 18 by rotation flashboard 20, big damper 19 backs of establishing in the main flue again; Air interchanger 23 rises and carries air and discharge flue gas in glass melter in kiln in the air flue, and the effect of air switching flow direction and flow of flue gas direction; Consistent with the commutation program of coal gas exchanger, conversion in common 20 minutes once.Heat exchanges take place with gas regenerator checker 8 ' and air regenerator checker 2 during through gas regenerator and air regenerator in high-temperature flue gas, and heating constitutes the low pore schamotte brick of checker.
The thermopair that can detect the gas temperature after the heating at any time all is equipped with at 7,7 ' top in the gas regenerator.
The present invention is by strengthening the sealing to transport pipe and coal gas flue, gas regenerator body of wall and the door of existing glass melter, prevent air admission coal gas flue 6,6 ', gas regenerator 7, coal gas heating such as 7 ' and the position of passing through, with blast, the premature combustion that prevents coal gas, guarantee the length and the temperature of flame behind the kiln, guarantee that the glass batch of kiln can be fused into the high-quality glass metal.
Above-mentioned effuser is by Q235B steel welding production, and laggard capable resistance to air loss bulge test is finished in welding, test pressure P 〉=0.1MPa, and flange connections adds gasket.
Above-mentioned electrical tar precipitator uses by the Changjiang river, Shaanxi Ingegneria Ambientale SRL and produces, and model is the electrical tar precipitator of DPJ160 type.
As shown in Figure 4, the coal gas exchanger 22 of the present invention's use is for jumping the bell-type coal gas exchanger; It is provided with outer cover 24, jumps cover 25, water seal 26, left side flue 27, right side flue 27 ', middle flue 28, gas line 29, linkage assembly 30.
Jumping the bell-type coal gas exchanger is the coal gas exchange system of glass melter.This import of jumping the bell-type coal gas exchanger is connected with the outlet of gas line 29, and its outlet is provided with three, and centre exit is middle flue 28, i.e. flue gas discharge opening, and the outlet on the left side is a left side flue 27, the outlet on the right is a right side flue 27 '; Left side flue 27 and right side flue 27 ' are communicated with the coal gas flue of homonymy respectively.
By the switch operation program that pre-establishes, in glass melter, carry coal gas and in kiln, discharge flue gas by jumping the bell-type coal gas exchanger, and the flow direction of conversion flow of gas direction and flue gas, conversion in common 20 minutes is once.
Concrete operations are: jump the cover position by 30 conversion of electric motor drives drivening rod mechanism, left side flue 27 or right side flue 27 ' are communicated with in turn with middle flue 28 respectively, to reach the purpose of coal gas commutation.
Coal gas is entered in the outer cover 24 by gas line 29, jumping cover 25 covers the middle flue 28 and the left side flue 27 of this jumping bell-type coal gas exchanger base, with water seal 26 it is sealed, make outer cover 24, jump cover 25 sealings, therefore form two passes, coal gas enters the gas regenerator internal heating of this side by the coal gas flue of right side flue 27 ' through the right side, goes into molten glass pond internal combustion, the molten glass admixtion again after the port settling chamber on right side and air mixed; Behind the gas regenerator in the port settling chamber of the flue gas of this moment in the melting furnaces by the left side, left side and the coal gas flue in left side, discharge by the exhaust gases passes of left side flue 27 and middle flue 28.After the position of cover 25 is jumped in conversion, jumping cover 25 covers the middle flue 28 and the right side flue 27 ' of coal gas exchanger 22 bases, with water seal 26 it is sealed, make outer cover 24, jump cover 25 sealings, form two passes, coal gas enters the gas regenerator internal heating of this side by the coal gas flue of left side flue 27 through the left side, goes into molten glass pond internal combustion, the molten glass admixtion again after the port settling chamber in left side and air mixed; Flue gas in the melting furnaces is discharged by the exhaust gases passes of right side flue 27 ' and middle flue 28 by the port settling chamber on right side, the gas regenerator on right side, the coal gas flue on right side.
The jumping bell-type coal gas exchanger that the present invention is used is for the model of being produced by the Remote Machine Co., Ltd., Wuxi City is the jumping bell-type coal gas exchanger of MJ1.8 type.
Principle of the present invention is as follows: coal is under the secluding air condition, and decomposes generates the process of coal gas, tar, crude benzol and coke, is called the dry distillation of coal (or claiming coking, coking).By the warm eventually difference of heating, can be divided into three kinds: 500～600 ℃ are low-temperature pyrolysis, and 900～1100 ℃ is high temperature carbonization, and 700～900 ℃ is medium temperature carbonization.Be the malleation operation during destructive distillation coking furnace ordinary production, gas blower is combustion-supporting from the bottom air blast, and coal adds from furnace roof, and the coal gas of generation is collected at the top of stove.Top at the destructive distillation coking furnace, the coal gas that is produced in the retort process is collected with pipeline, send into electrical tar precipitator by pipeline again and remove oil purification, after being forced into 500Pa, roots blower is transported to gas line, arrive coal gas flue by coal gas exchanger, be heated to 800～1200 ℃ through the gas regenerator again, by going into molten glass pond internal combustion, molten glass admixtion after port settling chamber and the air mixed.1350～1650 ℃ of high-temperature flue gas that produce are discharged from opposite side port settling chamber, gas regenerator and coal gas flue, air regenerator and air flue, heat the checker that is provided with in gas regenerator and the air regenerator simultaneously, promptly as the refractory brick of heat exchange material.Used roots blower is the blower fan of MLA84WD for the model of being produced by the air-blower plant, Tianjin.
Electrical tar precipitator applies high voltage direct current between plain conductor and metal pipe-wall (or pole plate), be enough to make gas to produce ionized electric field to keep, and makes and forms the corona zone between the anode and cathode.Press electric field theory, positive ion is adsorbed in electronegative corona discharge electrode, and negative ion is adsorbed in the receiving electrode of positively charged; All negative ions that are ionized all are full of the whole space between corona discharge electrode and the receiving electrode.When the coal gas that contains impurity such as tar droplet during by this electric field, the impurity that has adsorbed negative ion and electronics moves to that to discharge institute behind the receiving electrode electrically charged under the effect of electric field Coulomb force, and is adsorbed on the receiving electrode, thereby reach the purpose of Purge gas, be commonly referred to charged phenomenon.Trickling was downwards automatically discharged from the electrical tar precipitator bottom when impurity level on being adsorbed in receiving electrode was increased to greater than its sticking power, and the pure qi (oxygen) body then leaves and enter next procedure from electrical tar precipitator top.
Jumping the bell-type coal gas exchanger is the coal gas exchange system that is used for glass melter.Its import connects gas line, and outlet connects coal gas flue and exhaust gases passes, presses the switch operation program, and in kiln, carry coal gas and in kiln, discharge flue gas, and the flow direction of conversion coal gas and flue gas, conversion in common 20 minutes is once.Jump the position of covering by electric motor drives drivening rod mechanism alternation, left side flue or right side flue are communicated with in turn with middle flue respectively, to reach the purpose of coal gas commutation.
In total system, need the blast of strict control coal gas, premature combustion and go into kiln after the length and the temperature of flame.Its means mainly are by the sealing to the gas line in the coal gas course of conveying, coal gas flue and gas regenerator outer wall and outer side of door, avoid inclusion of air to realize, can guarantee that so also whole fuel enter the melting furnaces internal combustion; Control gas pressure simultaneously in 20～60Pa scope, gas speed and air velocity are complementary, help coal gas, air and mix the angle of pre-burning and flame ejection, thereby guarantee the length and the temperature of fusion of flame behind the kiln, and then guarantee the refining quality of glass in the port settling chamber.
Adopt the quality of technical scheme molten glass of the present invention to meet GB GB11614-2009 standard.
Claims (9)
1. method of utilizing coal low-temperature pyrolysis tail gas molten glass comprises that step is as follows:
1) destructive distillation coking furnace top accumulative tail gas is sent into the electrical tar precipitator oil removing through an effuser and be cleaned into purified gas;
2) purified gas of step 1) is under the roots blower applied pressure, and the gas line through being connected with glass melter enters in the glass melter, enters gas regenerator internal heating to 800～1200 ℃ successively behind coal gas exchanger and coal gas flue; Wherein, the roots blower applied pressure is 500Pa;
3) step 2) purified gas after the heating enters molten glass pond internal combustion, the molten glass admixtion in the top, gas regenerator enters the port settling chamber and air mixed again.
2. method according to claim 1 is characterized in that: the top of the described destructive distillation coking furnace of step 1) offers the mouth of pipe, is welded with pipeline on its mouth of pipe; Be connected by flange between the import of described effuser and the described pipeline; Junction at flange is equipped with gasket.
3. method according to claim 2 is characterized in that: described effuser also will have the step of this effuser being carried out the resistance to air loss bulge test, test pressure P 〉=0.1MPa before feeding tail gas.
4. method according to claim 1 is characterized in that: the described purified gas of step 1) contains following weight percent composition: CO 18～26%, H
218～26%, CH
46～10%, CO
25.5～6.5%, O
20.2～1.0%, N
235～45%, calorific value is 1800～2200kcal/m
3
5. method according to claim 1 is characterized in that: step 2) described coal gas exchanger is for jumping the bell-type coal gas exchanger; This import of jumping the bell-type coal gas exchanger is connected with described gas line, and its outlet is provided with three, and centre exit is the middle flue that flue gas is discharged; The outlet on left and right both sides is respectively left side flue and right side flue, and left side flue and right side flue are communicated with respectively and with the described coal gas flue of its homonymy.
6. method according to claim 1 is characterized in that: step 2) the observation purge hole of described gas regenerator door is provided with 8-15.
7. method according to claim 6 is characterized in that: the heat exchange material of grid-like is housed in the described gas regenerator, and this heat exchange material is low pore schamotte brick.
8. according to each described method of claim 1～7, it is characterized in that: the side wall inboard of described coal gas flue and arch top internal surface all are coated with and are brushed with sealing slurry, and its thickness is 6-20mm; The side wall outside and the arch top outside surface of described coal gas flue all are coated with cement layer and thermal insulation coatings layer from the inside to the outside; Wherein, the thickness of cement layer is 20～40mm, and the thickness of thermal insulation coatings layer is 20～40mm; The outside of the outer wall of described gas regenerator and door is coated with described thermal insulation coatings layer, and its thickness is 30～50mm.
9. method according to claim 8 is characterized in that: described sealing slurry is formed by water glass and the refractory mortar mixed with 1: 1; Described thermal insulation coatings layer is the compound silicate insulating paint of paste.
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| CN102795757A (en) * | 2012-08-27 | 2012-11-28 | 中国建材国际工程集团有限公司 | Method for applying low-heat value gas to combustion in melting furnace |
| CN110645805A (en) * | 2019-10-09 | 2020-01-03 | 陕西神木瑞诚玻璃有限公司 | A method for replacing producer gas with blue carbon tail gas for burning in melting furnace of glass factory |
| CN111233306A (en) * | 2020-02-26 | 2020-06-05 | 北京鑫汇兴通科技有限公司 | Heat preservation and sealing structure of glass melting furnace gas flue and construction process thereof |
| EP4509471A4 (en) * | 2022-04-15 | 2025-07-16 | Nippon Electric Glass Co | Method for producing glass article |
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| EP4063320A1 (en) * | 2021-03-25 | 2022-09-28 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Process for thermoprocessing a charge |
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| US5893940A (en) * | 1997-05-05 | 1999-04-13 | Ppg Industries, Inc. | Reduction of NOx emissions in a glass melting furnace |
| CN101265013A (en) * | 2008-04-28 | 2008-09-17 | 卢爱民 | Combustion generation furnace gas precombustion chamber and heat accumulating chamber for glass tank furnace |
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| US5893940A (en) * | 1997-05-05 | 1999-04-13 | Ppg Industries, Inc. | Reduction of NOx emissions in a glass melting furnace |
| CN101265013A (en) * | 2008-04-28 | 2008-09-17 | 卢爱民 | Combustion generation furnace gas precombustion chamber and heat accumulating chamber for glass tank furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102795757A (en) * | 2012-08-27 | 2012-11-28 | 中国建材国际工程集团有限公司 | Method for applying low-heat value gas to combustion in melting furnace |
| CN102795757B (en) * | 2012-08-27 | 2015-01-21 | 中国建材国际工程集团有限公司 | Method for applying low-heat value gas to combustion in melting furnace |
| CN110645805A (en) * | 2019-10-09 | 2020-01-03 | 陕西神木瑞诚玻璃有限公司 | A method for replacing producer gas with blue carbon tail gas for burning in melting furnace of glass factory |
| CN111233306A (en) * | 2020-02-26 | 2020-06-05 | 北京鑫汇兴通科技有限公司 | Heat preservation and sealing structure of glass melting furnace gas flue and construction process thereof |
| EP4509471A4 (en) * | 2022-04-15 | 2025-07-16 | Nippon Electric Glass Co | Method for producing glass article |
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| CN102173559B (en) | 2013-04-03 |
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