CN1888084A - Hot blast stove with heat accumulating burner - Google Patents
Hot blast stove with heat accumulating burner Download PDFInfo
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- CN1888084A CN1888084A CN 200610012964 CN200610012964A CN1888084A CN 1888084 A CN1888084 A CN 1888084A CN 200610012964 CN200610012964 CN 200610012964 CN 200610012964 A CN200610012964 A CN 200610012964A CN 1888084 A CN1888084 A CN 1888084A
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Abstract
The present invention discloses one kind of hot blast stove with one main heat accumulating chamber and one heat accumulating burner connected through pipeline to the main heat accumulating chamber. The heat accumulating burner has small inside heat accumulating chambers, and through controlling the fume amount through the inside heat accumulating chambers, the combustion supporting air and coal gas may be preheated to over 1000 deg.c. The hot blast stove with blast furnace gas as single fuel may have its output hot blast temperature reach 1300 deg.c.
Description
Technical field
The present invention relates to a kind of hotblast stove that is used for metallurgy industry, relate to a kind of hot blast stove with heat accumulating burner specifically.
Background technology
Hotblast stove provided hot blast for iron-smelting blast furnace during ironmaking was produced, and hot blast temperature is an important indicator of blast furnace ironmaking, improved hot blast temperature and can improve combustion intensity, reduced ratio of putting coke into furnace, can also increase and produce iron amount and injecting coal quantity.100 ℃ of the every raisings of blast furnace air temperature, iron coke per ton ratio can reduce 20kg, increases output 4%.Therefore, metallurgy industry is all attached great importance to wind-warm syndrome remained on and is carried out smelting operation on the higher level.
At present, the blast funnace hot blast stove of domestic use uses sleeve-type ceramic burner mostly, grid type ceramic burner, three-port type ceramic burner and Ka Lujinshi top burner etc.More than several burners do not possess the ability of self-preheating air, coal gas, if use blast furnace gas to be fuel, do not adopt other preheating measure, because blast furnace gas calorific value is lower, flame temperature is not high during burning, and its hot-blast outlet temperature is on the low side, approximately 950-1050 ℃.
From the angle of reasonable utilization of energy, blast funnace hot blast stove uses the self-produced blast furnace gas of blast furnace to be fuel, and the high-temperature hot-air that can produce more than 1200 ℃ is optimal.For this reason, need carry out preheating to air, the coal gas that Combustion of Hot Air Furnace is used, the preheating technology of using has the roasting kiln of building an additional combustion blast furnace gas at present, but the approach of preheated air, coal gas, build the roasting kiln of an additional combustion blast furnace gas exactly, the low-temperature flue gas that the high-temperature flue gas admixture of its generation part is discharged by hotblast stove, by metallic recuperator, but preheated air, coal gas reach about 300 ℃; Be exactly in the blast-furnace hot-air stokehold in addition, build two little hotblast stoves, utilize two little Combustion of Hot Air Furnace air feeds to hocket, the warm-air supply blast furnace and hot blast cupola combustion of its generation is used.Though above-mentioned two kinds of approach can improve flame temperature with air, gas preheating to certain temperature, have realized high hot blast temperature, such must needs built a cover system in addition, and increased many equipment, brings operation control complicated, improved production cost.Therefore, the way of seeking more effective, higher air, gas preheating temperature has become urgent problem.
Summary of the invention
The objective of the invention is for addressing the above problem, and provide a kind of burner self that utilizes that air, coal gas are carried out two accumulation of heats, is the hot blast stove with heat accumulating burner of fuel with single blast furnace gas.
Realization above-mentioned purpose technical solution is finished like this: a kind of hot blast stove with heat accumulating burner, comprise the primary regenerator, and wherein vault one side in described primary regenerator connects a combustion chamber by pipe connecting.
In the present invention, related combustion chamber has a housing, is provided with left and right combustion channels in its housing successively, the little regenerator of left and right coal gas, and the little regenerator of left and right air, the middle part has a hot-blast outlet to communicate with combustion channels; The little regenerator of described left and right coal gas is passed through the outlet of pipe connection one coal gas reversing valve respectively, gas inlet by this coal gas reversing valve links to each other with gas main, the exhanst gas outlet of this coal gas reversing valve links to each other with coal gas side induced draft fan by pipeline, the air of composition, gas double heat-accumulation combustion chamber.
In the present invention, by the little regenerator of left and right coal gas, coal gas reversing valve; The little regenerator of left and right air, air reversing valve is formed air, gas double heat-accumulation combustor.
In the present invention, related combustion chamber has a housing, is provided with left and right combustion channels in the housing successively, left and right coal gas ring casing, the little regenerator of left and right air; This middle part has a hot-blast outlet to communicate with combustion channels; Described left and right coal gas ring casing connects left and right gas stop valve respectively by pipeline; The little regenerator of described left and right air is passed through the outlet of pipe connection one air reversing valve respectively, air intlet by this air reversing valve connects a gas blower, the exhanst gas outlet of this air reversing valve links to each other with the air side induced draft fan by pipeline, the air single regenerative combustion chamber of composition.
In the present invention, by the little regenerator of left and right air, air reversing valve; Left and right coal gas ring casing, left and right gas stop valve is formed the air single regenerative burner.
In the present invention, related combustion chamber has a housing, is provided with left and right combustion channels in its housing successively, left and right air ring casing, the little regenerator of left and right coal gas; This middle part has a hot-blast outlet to communicate with combustion channels; Described left and right air ring casing connects left and right air cutoff valve respectively by pipeline; The little regenerator of described left and right coal gas is passed through the outlet of pipe connection one coal gas reversing valve respectively, gas inlet by this coal gas reversing valve connects gas main, the exhanst gas outlet of this coal gas reversing valve links to each other with coal gas side induced draft fan by pipeline, the coal gas list heat-accumulation combustion chamber of composition.
In the present invention, by the little regenerator of left and right coal gas, coal gas reversing valve; Left and right air ring casing, left and right air cutoff valve are formed coal gas list heat-accumulation combustor.
In the present invention, described pipe connecting is provided with the expansion compensator that corrugated tube constitutes.
In above-mentioned, related air, its principle of work of gas double heat-accumulation combustor are: heat-storage type burner can be with coal gas, air preheating simultaneously.When a side air, the little regenerator of coal gas are in burning during working order, cooled coal gas, freezing air be by red-hot heat storage, is heated to be heating gas, warm air goes burning; Opposite side air, the little regenerator of coal gas necessarily are in the accumulation of heat state, the flue gas major part that burning produces is drained through the hotblast stove primary regenerator, the small portion flue gas passes through heat-storage type burner air heat storage, coal gas heat storage through combustion channels under the effect of induced draft fan, after making heat storage accumulate following heat, discharge through the burner flue.After 3～10 minutes, two regenerator working ordeies are exchanged.
In above-mentioned, related its principle of work of air single regenerative burner is: heat-storage type burner is when works better, and two little regenerator of air can not be in a kind of working order.When a little regenerator of air was in the burning working order, this side coal gas path was open-minded, and freezing air is heated to be warm air and goes combustion-supporting by red-hot heat storage; The little regenerator of another air necessarily is in the accumulation of heat state as flue, this side coal gas path blockade, the flue gas major part that burning produces is drained through the hotblast stove primary regenerator, the small portion flue gas arrives the air heat storage of heat-storage type burner through combustion channels under the effect of induced draft fan, after making heat storage accumulate following heat, discharge through the burner flue.After 3～10 minutes, both sides coal gas path, two little regenerator working ordeies of air are exchanged.
In above-mentioned, related its principle of work of coal gas list heat-accumulation combustor is: heat-storage type burner is when works better, and two little regenerator of coal gas can not be in a kind of working order.When a little regenerator of coal gas was in the burning working order, this air flue was open-minded, and cooled coal gas is heated to be heating gas and goes the combustion burning by red-hot heat storage; The little regenerator of another coal gas necessarily is in the accumulation of heat state as flue, this air flue is closed, the flue gas major part that burning produces is drained through the hotblast stove primary regenerator, the small portion flue gas arrives the coal gas heat storage of heat-storage type burner through combustion channels under the effect of induced draft fan, after making heat storage accumulate following heat, discharge through the burner flue.After 3～10 minutes, the both sides air flue, two little regenerator working ordeies of coal gas are exchanged.
The positively effect that hot blast stove with heat accumulating burner of the present invention has is: by connecting a combustion chamber in original primary regenerator, make it become the burner of a heat accumulating type.So in when burning, this burner self can ℃ improve air, coal gas accumulation of heat to 1000 flame temperature greatly.With single blast furnace gas is fuel, and under the prerequisite that does not increase any off-set facility, the hot wind supply furnace temperature can be above 1300 ℃ outward to make hotblast stove.It is low to efficiently solve existing hotblast stove blast furnace gas calorific value, flame temperature problem on the low side during burning.
Description of drawings
Fig. 1 is a synoptic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.Institute is an air single regenerative burner hotblast stove synoptic diagram to accompanying drawing, by air single regenerative burner hotblast stove ins and outs involved in the present invention is described, this figure is used for reference and explanation usefulness, is not to be used for restriction originally
Scope of invention.
By air single regenerative burner hotblast stove shown in Figure 1.It has a primary regenerator 1 and combustion chamber 2 two partss form.Its primary regenerator 1 has a vault, and a taper reducing is arranged at this top, and heat storage 4 is set in the primary regenerator, and bottom one side is established an exhanst gas outlet 17.Be connected with the vault of a combustion chamber 2 at the pipe connecting 3 of its primary regenerator 1 vault, one side by the cylindricality of connection.The dome portions of this combustion chamber 2 is provided with the taper reducing equally.A box hat is adopted in described combustion chamber 2, and its interior building by laying bricks or stones with refractory materials forms.Upper isolation in this combustion chamber 2 become a left combustion channels 6 and a right combustion channels 7, and the pipe connecting 3 of the cylindricality by arch crown part is communicated with primary regenerator 1.The corresponding connection in bottom in this combustion chamber 2 with left and right combustion channels 6 and 7 be little regenerator 11 of left air and the little regenerator 10 of right air that isolation is arranged to.Pass through two airs of an air reversing valve 15 of pipe connection in the bottom of the little regenerator 11 of described left and right air and 10.This air reversing valve 15 has an air intlet, two airs, an exhanst gas outlet, and the import of its air reversing valve 15 links to each other with gas blower 14 by pipeline; The exhanst gas outlet of air reversing valve 15 links to each other with induced draft fan 16 by pipeline.A hot-blast outlet 5 is established at the middle part of described combustion chamber 2.Between the top of hot-blast outlet 5 bottoms and the little regenerator 11 of left and right air and 10, being arranged with left coal gas ring casing 9 and right coal gas ring casing 8, be attached thereto logical pipeline on it respectively and be provided with left gas stop valve 13 and gas stop valve 12.
In above-mentioned, by little regenerator of left and right air and air reversing valve, the air single regenerative burner that left and right coal gas ring casing and left and right gas stop valve are formed.
In above-mentioned, described cylindricality pipe connecting 3 is provided with expansion compensator.Here used expansion compensator is that to be provided with corrugated tube as compensation.In the middle of reality, also can select other form for use.
The air single regenerative burner is when burning, and the combustion air that gas blower 14 bloats enters the little regenerator 11 of left air by air reversing valve 15 left side air intlets, and freezing air is heated to be warm air by the little regenerator 11 of red-hot left air and enters combustion channels 6; This moment, left gas stop valve 13 was in open mode.At this moment coal gas also enters left gas flue 6 by ring casing 9; Coal gas with red-hot combustion air in 6 li mixed firings of combustion channels.The high-temperature flue gas that burning produces, most of primary regenerator 1 that enters into hotblast stove by the pipe connecting 3 of cylindricality; Flow through behind the heat storage 4, arrange flues by exhanst gas outlet 17; The sub-fraction of the high-temperature flue gas that burning simultaneously produces flows to right combustion channels 7, after by the little regenerator 10 of right air the heat major part being stayed this regenerator, this partial fume is discharged by induced draft fan 16 through the reversing valve exhanst gas outlet through air reversing valve 15 right side air intlets.After burner is in above-mentioned state 3-10 minute, advance the heat working order of going into to burn by the little regenerator 10 of the right air of two gas stop valves, air reversing valve 15 conversion work states, right combustion channels 7, right coal gas ring casing 8.Burner is when burning, and above-mentioned two kinds of working ordeies were exchanged once every 3-10 minute.
After the Combustion of Hot Air Furnace state is finished, transfer the air feed state to.Under this state, air reversing valve 15 is closed, and at this moment, left and right gas stop valve 13 and 14 is all closed.The exhanst gas outlet 17 of high pressure cold wind 1 bottom from the primary regenerator enters primary regenerator 1, enters combustion channels through heat storage 4, cylindricality pipe connecting 3, flows to the hot blast main pipe line from hot-blast outlet 5.
The operation of whole hotblast stove is to hocket under burning, air feed two states.
Because the flue gas that enters the little thermophore of air chamber is very high, can improve the temperature of combustion flame with more than the preheating of air to 1000 ℃, can realize that hotblast stove sends hot blast temperature outside more than 1300 ℃.
In above-mentioned, related its work of single heat-accumulation combustor is that principle is: during works better, the little regenerator 11 of left and right air and 10 in the combustion chamber 2 can not be in a kind of working order.When wherein the little regenerator of an air was in the burning working order, this moment, fuel passage was open-minded, and freezing air is heated to be warm air and goes combustion-supporting by red-hot heat storage; The little regenerator of another air necessarily is in the accumulation of heat state as flue, this path blockade that burns, products of combustion (flue gas) is most of drains through the hotblast stove primary regenerator, the small portion flue gas is under the effect of induced draft fan, through the heat storage of combustion channels to the regenerator burner, and after in the long-pending heat down, discharge through the burner flue.After 3-10 minute, two little regenerator of air are exchanged working order.
Claims (8)
1, a kind of hot blast stove with heat accumulating burner comprises the primary regenerator, it is characterized in that, vault one side in described primary regenerator (1) connects a combustion chamber (2) by pipe connecting (3).
2, by the described hot blast stove with heat accumulating burner of claim 1, it is characterized in that described combustion chamber (2), have a housing, be provided with left and right combustion channels in its housing successively, the little regenerator of left and right coal gas, the little regenerator of left and right air, middle part have a hot-blast outlet to communicate with combustion channels; The little regenerator of described left and right coal gas is passed through the outlet of pipe connection one coal gas reversing valve respectively, gas inlet by this coal gas reversing valve links to each other with gas main, the exhanst gas outlet of this coal gas reversing valve links to each other with coal gas side induced draft fan by pipeline, the air of composition, gas double heat-accumulation combustion chamber.
3, by the described hot blast stove with heat accumulating burner of claim 2, it is characterized in that, by the little regenerator of left and right coal gas, coal gas reversing valve; The little regenerator of left and right air, air reversing valve is formed air, gas double heat-accumulation combustor.
4, by the described hot blast stove with heat accumulating burner of claim 2, it is characterized in that, described combustion chamber (2) has a housing, is provided with left and right combustion channels (6,7), left and right coal gas ring casing (9,8), the little regenerator of left and right air (11,10) in its housing successively; This middle part has hot air outlet (5) to communicate with combustion channels; Described left and right sides coal gas ring casing (9,8) is connected with left and right gas stop valve (13,12); The little regenerator of described left and right air (11,10) is connected with air reversing valve (15) air, and its air intlet and exhanst gas outlet link to each other with induced draft fan (16) with gas blower (14) respectively, the air single regenerative combustion chamber of composition.
5, by the described hot blast stove with heat accumulating burner of claim 4, it is characterized in that, by the little regenerator of left and right air (11,10), air reversing valve (15); Left and right coal gas ring casing (9,8), left and right gas stop valve (13,12) is formed the air single regenerative burner.
6, by the described hot blast stove with heat accumulating burner of claim 2, it is characterized in that described combustion chamber (2) have a housing, be provided with left and right combustion channels in the housing successively, left and right air ring casing, the little regenerator of left and right coal gas; This middle part has a hot-blast outlet to communicate with combustion channels; Described left and right air ring casing connects left and right air cutoff valve respectively by pipeline; The little regenerator of described left and right coal gas is passed through the outlet of pipe connection one coal gas reversing valve respectively, gas inlet by this coal gas reversing valve connects gas main, the exhanst gas outlet of this coal gas reversing valve links to each other with coal gas side induced draft fan by pipeline, the coal gas list heat-accumulation combustion chamber of composition.
7, by the described hot blast stove with heat accumulating burner of claim 6, it is characterized in that, by the little regenerator of left and right coal gas, coal gas reversing valve; Left and right air ring casing, left and right air cutoff valve are formed coal gas list heat-accumulation combustor.
By the described hot blast stove with heat accumulating burner of claim 1, it is characterized in that 8, described pipe connecting (3) is provided with the expansion compensator that corrugated tube constitutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610012964 CN1888084A (en) | 2006-07-19 | 2006-07-19 | Hot blast stove with heat accumulating burner |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610012964 CN1888084A (en) | 2006-07-19 | 2006-07-19 | Hot blast stove with heat accumulating burner |
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| CN1888084A true CN1888084A (en) | 2007-01-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808057A (en) * | 2011-05-30 | 2012-12-05 | 温向阳 | Coal base direct reduction iron process of external heating horizontal channel type furnace |
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2006
- 2006-07-19 CN CN 200610012964 patent/CN1888084A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808057A (en) * | 2011-05-30 | 2012-12-05 | 温向阳 | Coal base direct reduction iron process of external heating horizontal channel type furnace |
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