CN102978310A - Coal powder injection method for blast furnace - Google Patents
Coal powder injection method for blast furnace Download PDFInfo
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- CN102978310A CN102978310A CN2012105465913A CN201210546591A CN102978310A CN 102978310 A CN102978310 A CN 102978310A CN 2012105465913 A CN2012105465913 A CN 2012105465913A CN 201210546591 A CN201210546591 A CN 201210546591A CN 102978310 A CN102978310 A CN 102978310A
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Abstract
The invention provides a coal powder blowing method for a blast furnace, which comprises the following steps: A, putting coal powder in a coal powder bin into a blowing tank of a blowing system; B, obtaining high-pressure gas from a new gas source, pressurizing the blowing tank, and blowing the coal powder into a blast furnace; C, guiding the gas in the blowing tank to a nozzle at the lower part of the coal powder bin, and blowing into the coal powder bin; and D, reducing or cutting off the supply of the gas from the new gas source to the nozzle at the lower part of the coal powder bin while the step C is implemented, wherein the step D is implemented in a way that a check valve, a heater, a drainer, a flow control element and a regulating valve are mounted on a pipeline from the blowing tank to the coal powder bin to reduce or cut off the supply of the gas from the new gas source to the first nozzle or second nozzle at the lower part of the coal powder bin. According to the invention, the gas source in the blowing tank is guided into the first nozzle of the coal powder bin through the pipeline and other elements on the pipeline to replace one part of the new gas source, thereby reducing the consumption of the blowing gas source.
Description
Technical field
The present invention relates to particularly breeze blowing field, ironmaking equipment field, be specifically related to a kind of blast-furnace coal powder injection method.
Background technology
The most of medium that adopts nitrogen to carry as coal dust of existing blast-furnace coal powder injection.The breeze blowing of a blast furnace generally is made of two to three injection systems, is arranged in juxtaposition.The main processes of coal powder injection is generally coal dust by the powder storehouse winding-up tank of packing into, close pressurising in charging valve and the backward tank of diffusion valve, open the coal powder injection valve after reaching certain pressure, coal dust in the winding-up tank is sprayed into blast furnace, after system's winding-up operation finishes, close the coal powder injection valve, open diffusion valve, nitrogen in the tank is put into the cloth bag collection machine of Pulverized Coal Bin top or pulverized coal preparation system, and the coal dust that wherein contains is recovered, and nitrogen then enters atmosphere without any utilization.
Existing a kind of technology that reclaims the nitrogen in the winding-up tank: the winding-up tank that finishes of will jetting is communicated with a gas-holder, pressed gas part in the winding-up tank enters gas-holder and stores, when the tank of having waited to jet needs pressurising gas-holder is communicated with this winding-up tank, a part of gas in the gas-holder enters this winding-up tank, thereby has reclaimed a part of nitrogen.The weak point of the method is that technique is complicated, needs the investment gas-holder, and it is larger to take up room, and the rate of recovery is not high.
Also having a kind of method of jetting the tank nitrogen recycling is that a blast furnace arranges three injection systems, the not immediately pressure release of winding-up tank that winding-up wherein is complete, need the winding-up tank of pressurising to be connected but this tank and another are installed powder, a part of pressed gas enters needs the winding-up tank of pressurising to be utilized.There is complex process equally in the method, the deficiency that rate of recovery of nitrogen is not high.
Summary of the invention
The technical problem to be solved in the present invention is, for the defects that exists in the prior art, a kind of blast-furnace coal powder injection method is provided, and the method by simple structure, simply technical process reaches the nitrogen recycling utilization ratio that lower initial outlay realizes higher winding-up tank.
The present invention solves the problems of the technologies described above the technical scheme that adopts to be:
A kind of blast-furnace coal powder injection method comprises the following steps:
A, the coal dust in the Pulverized Coal Bin is packed in the winding-up tank of injection system;
B, use will jet tank pressurization and coal dust sprayed into blast furnace of the high pressure gas that obtain from new source of the gas;
The nozzle that gas in C, the tank of will jetting is directed at the Pulverized Coal Bin bottom sprays into Pulverized Coal Bin.
In such scheme, described nozzle comprises the first nozzle and the second nozzle on the bottom bulkhead that is installed on Pulverized Coal Bin, described the first nozzle and the first pipeline connection that is used to pass into new source of the gas, and the outlet of the first nozzle is in Pulverized Coal Bin; Described second nozzle links to each other with second pipe, described second pipe be connected to the pipeline of winding-up on the tank and communicate; Gas among the described step C in the winding-up tank is directed at second nozzle and then sprays into Pulverized Coal Bin by pipeline, second pipe successively.
In such scheme, also comprise step D, when carrying out step C, reduce or cut off new source of the gas to the supply of the gas of Pulverized Coal Bin lower nozzle.
In such scheme, reduce the source of the gas supply among the described step D and realize in the following way: described the first pipeline is communicated with second pipe, by the gas of the first pipeline with by shared the first nozzle of the gas of second pipe and second nozzle; Gas in the winding-up tank is directed at the first nozzle by pipeline, second pipe and the first pipeline successively, replaces the new source of the gas of a part, thereby reduces new source of the gas to the consumption of Pulverized Coal Bin lower nozzle.
In such scheme, described step D can also realize in the following way:
At described second pipe reverse checkvalve is installed, its direction is to allow gas to flow in Pulverized Coal Bin, enters the pipeline that leads to the tank of jetting in order to prevent the new source of the gas that passes into the first pipeline;
Mounting heater on described second pipe enters the gas of Pulverized Coal Bin in order to heating;
At described second pipe flow control element is installed, this flow control element be one section internal diameter less than the pipeline of the first pipeline or second pipe internal diameter, or choker-line, or orifice plate;
At described pipeline variable valve is installed, variable valve has top hole pressure to be regulated and cutting function, pressure or the flow of control pipeline;
Reduce or cut off new source of the gas to the supply of the gas of Pulverized Coal Bin bottom the first nozzle or second nozzle by reverse checkvalve, well heater, flow control element and variable valve.
In such scheme, described hydathode, well heater, reverse checkvalve, flow control element also can be installed on the pipeline that communicates with the tank of jetting.
Pulverized Coal Bin is used for storing the coal suitable for blowing powder, and the first pipeline is used for new nitrogen is introduced the first nozzle, and the first nozzle is installed in the bottom of Pulverized Coal Bin, plays rheomorphism.The diffusion valve of injection system is put into Pulverized Coal Bin for the gas in the tank of will jetting by diffuse channel.At second pipe hydathode is installed, in order to the moisture in the diffused gas of draining.At second pipe well heater is installed, enters the nitrogen of Pulverized Coal Bin in order to heating.At second pipe reverse checkvalve is installed, enters the pipeline that leads to the tank of jetting in order to prevent the new source of the gas that passes into the first pipeline.The pressure of control pipeline or the function of flow are realized that by variable valve variable valve has top hole pressure to be regulated and cutting function; Also can realize by flow control element is installed at second pipe, this flow control element can be one section internal diameter less than the pipeline of the first pipeline or second pipe internal diameter, also can be choker-line, also can be orifice plate.Hydathode, well heater, reverse checkvalve, flow control element can be installed on the pipeline, also can be installed on the second pipe, and its built-up sequence, quantity are not done restriction.Can some parts be installed according to circumstances on pipeline or the second pipe, other valve can be installed yet.
Be communicated with the second pipe that reclaims nitrogen by the winding-up tank by the first pipeline of new nitrogen, such two kinds of nitrogen just can share the first nozzle and second nozzle by the first pipeline and second pipe.
Principle of work of the present invention: in the winding-up operation of an injection system, in the winding-up tank of the injection system of at first coal dust in the Pulverized Coal Bin being packed into; Then use the high pressure gas that obtain from new source of the gas to pressurize and coal dust is sprayed into blast furnace through the valve tank of will jet; Then the first nozzle or second nozzle that the gas in the tank of will jetting is directed at the Pulverized Coal Bin bottom spray into Pulverized Coal Bin, reduce by reverse checkvalve, well heater, hydathode, flow control element and variable valve simultaneously or cut off new source of the gas to the supply of the gas of Pulverized Coal Bin bottom the first nozzle or second nozzle; Finish to change over to when diffusing operation when the winding-up operation at last, open variable valve, gas enters the second nozzle of bottom, powder storehouse through pipeline and second pipe in the winding-up tank, at this moment the new nitrogen of the first pipeline can be closed, or the gas flow of the first pipeline is reduced.
Beneficial effect of the present invention: the source of the gas in the tank of will jetting replaces the new source of the gas of a part, thereby reduces consumption of air source by the first nozzle of other element introducing Pulverized Coal Bin on pipeline and the pipeline.
Description of drawings
Fig. 1 is the structural representation that blowing method of the present invention does not comprise step D.
Fig. 2 is the structural representation of blowing method of the present invention.
Among the figure, 1. Pulverized Coal Bin, 2. the first pipeline, 3. the first nozzle, 4. second pipe, 5. second nozzle, 6. reverse checkvalve, 7. well heater, 8. hydathode, 9. flow control element, 10. variable valve, 11. pipelines, 12. diffuse channel, 13. diffusion valves, 14. injection systems, 15. winding-up tanks, 16. valves.
Embodiment
Below in conjunction with drawings and Examples technical scheme of the present invention is further described in detail.
Blast-furnace coal powder injection method of the present invention comprises the following steps:
A, the coal dust in the Pulverized Coal Bin is packed in the winding-up tank of injection system;
B, use will jet tank pressurization and coal dust sprayed into blast furnace of the high pressure gas that obtain from new source of the gas;
The nozzle that gas in C, the tank of will jetting is directed at the Pulverized Coal Bin bottom sprays into Pulverized Coal Bin;
D, when carrying out step C, reduce or cut off new source of the gas to the supply of the gas of Pulverized Coal Bin lower nozzle.
With reference to shown in Figure 1, the present invention realizes the fine coal blowing unit of blast of above-mentioned blowing method, comprises Pulverized Coal Bin 1, the first pipeline 2, the first nozzle 3, second pipe 4, second nozzle 5, some injection systems that are arranged in juxtaposition 14, winding-up tank 15, diffusion valve 13, diffuse channel 12, pipeline 11; The first pipeline 2 one ends connect new source of the gas, and the other end connects the first nozzle 3, the first nozzles 3 and is installed on the bottom bulkhead of Pulverized Coal Bin 1, and the outlet of the first nozzle 3 is in Pulverized Coal Bin; Second pipe 4 one ends link to each other with second nozzle 5 on the bottom bulkhead that is installed on Pulverized Coal Bin 1, and the other end links to each other with pipeline 11, and pipeline 11 the other ends link to each other with winding-up tank 15, and variable valve 10 is installed on the pipeline 11.
With reference to shown in Figure 2, on the described second pipe 4 flow control element 9 is installed, this flow control element 9 is that one section internal diameter is less than the pipeline of the first pipeline 2 or second pipe 4 internal diameters, or choker-line, or orifice plate, the pressure of control pipeline 11 or the function of flow can be realized by variable valve 10 that also this valve can have to be regulated and cutting function.
On the described second pipe 4 hydathode 8 is installed.
On the described second pipe 4 well heater 7 is installed.
On the described second pipe 4 reverse checkvalve 6 is installed, its direction is to allow gas to Pulverized Coal Bin 1 interior flowing.
Described second pipe 4 is connected with the first pipeline 2, by the gas of the first pipeline 2 with by shared the first nozzle 3 of the gas of second pipe 4 and second nozzle 5.
The end that described pipeline 11 connects winding-up tank 15 is provided with special purpose interface, and perhaps the diffuse channel 12 with winding-up tank 15 shares an interface.
Among the embodiment, injection system 14 is 2.
Pulverized Coal Bin 1 is used for storing the coal suitable for blowing powder, and the first pipeline 2 is used for new nitrogen is introduced the bottom that the first nozzle 3, the first nozzles 3 are installed in Pulverized Coal Bin 1, plays rheomorphism.The diffusion valve 16 of injection system 14 is put into Pulverized Coal Bin 1 for the gases in the tank 15 of will jetting by diffuse channel 12.At second pipe 4 hydathode 8 is installed, in order to the moisture in the diffused gas of draining.At second pipe 4 well heater 7 is installed, enters the nitrogen of Pulverized Coal Bin 1 in order to heating.At second pipe 4 reverse checkvalve 6 is installed, enters the pipeline 11 that leads to the tank 15 of jetting in order to prevent the new source of the gas that passes into the first pipeline 2.The pressure of control pipeline 11 or the function of flow are realized that by variable valve 10 variable valve 10 has top hole pressure to be regulated and cutting function; Also can realize by flow control elements 9 are installed at second pipe 4, this flow control element 9 can be one section internal diameter less than the pipeline of the first pipeline 2 or second pipe 4 internal diameters, also can be choker-line, also can be orifice plate.Hydathode 8, well heater 7, reverse checkvalve 6, flow control element 9 can be installed on the pipeline 11, also can be installed on the second pipe 4, and its built-up sequence, quantity are not done restriction.Can some parts be installed according to circumstances on pipeline 11 or the second pipe 4, other valve can be installed yet.
Can be communicated with the second pipe 4 that reclaims nitrogen by the winding-up tank by the first pipeline 2 of new nitrogen, such two kinds of nitrogen just can share the first nozzle 3 and second nozzle 5 by the first pipeline 2 and second pipe 4.
In the winding-up operation of an injection system 14, in the winding-up tank 15 of the injection system 14 of at first coal dust in the Pulverized Coal Bin 1 being packed into; Then use the high pressure gas that obtain from new source of the gas to pressurize and coal dust is sprayed into blast furnace through valve 16 tank 15 of will jet; Then the first nozzle 3 or second nozzle 5 that the gas in the tank 15 of will jetting is directed at Pulverized Coal Bin 1 bottom spray into Pulverized Coal Bin 1, reduce by reverse checkvalve 6, well heater 7, hydathode 8, flow control element 9 and variable valve 10 simultaneously or cut off new source of the gas to the supply of the gas of Pulverized Coal Bin 1 bottom the first nozzle 3 or second nozzle 5; The operation of jetting at last finishes to change over to when diffusing operation, open variable valve 10, winding-up tank 15 interior gases enter the second nozzle 5 of 1 bottom, powder storehouse through pipeline 11 and second pipe 4, at this moment the new nitrogen of the first pipeline 2 can be closed, or the gas flow of the first pipeline 2 is reduced.In fact the function of this device is exactly that the nitrogen that will jet in the tank 15 is introduced the first nozzle 3 of Pulverized Coal Bin 1 by pipeline 11, second pipe 4 and the first pipeline 2, replaces the new nitrogen of a part, thereby reduces nitrogen consumption.
The new source of the gas of choosing among the embodiment is nitrogen, can certainly select other suitable gas.
Above-described only is preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, and the equivalence of therefore doing according to the present patent application claim changes, and still belongs to protection scope of the present invention.
Claims (6)
1. blast-furnace coal powder injection method comprises the following steps: A, the coal dust in the Pulverized Coal Bin is packed in the winding-up tank of injection system; B, use will jet tank pressurization and coal dust sprayed into blast furnace of the high pressure gas that obtain from new source of the gas, it is characterized in that: also comprise step C, the gas in the tank of will jetting is directed at the nozzle of Pulverized Coal Bin bottom and then sprays into Pulverized Coal Bin.
2. blast-furnace coal powder injection method as claimed in claim 1, it is characterized in that: described nozzle comprises the first nozzle and the second nozzle on the bottom bulkhead that is installed on Pulverized Coal Bin, described the first nozzle and the first pipeline connection that is used to pass into new source of the gas, the outlet of the first nozzle is in Pulverized Coal Bin; Described second nozzle links to each other with second pipe, described second pipe be connected to the pipeline of winding-up on the tank and communicate; Gas among the described step C in the winding-up tank is directed at second nozzle and then sprays into Pulverized Coal Bin by pipeline, second pipe successively.
3. blast-furnace coal powder injection method as claimed in claim 1 or 2 is characterized in that: also comprise step D, reduce when carrying out step C or cut off new source of the gas to the supply of the gas of Pulverized Coal Bin lower nozzle.
4. blast-furnace coal powder injection method as claimed in claim 3, it is characterized in that: reduce the source of the gas supply among the described step D and realize in the following way: described the first pipeline is communicated with second pipe, by the gas of the first pipeline with by shared the first nozzle of the gas of second pipe and second nozzle; Gas in the winding-up tank is directed at the first nozzle by pipeline, second pipe and the first pipeline successively, replaces the new source of the gas of a part, thereby reduces new source of the gas to the consumption of Pulverized Coal Bin lower nozzle.
5. blast-furnace coal powder injection method as claimed in claim 3, it is characterized in that: described step D can also realize in the following way:
At described second pipe reverse checkvalve is installed, its direction is to allow gas to flow in Pulverized Coal Bin, enters the pipeline that leads to the tank of jetting in order to prevent the new source of the gas that passes into the first pipeline;
Mounting heater on described second pipe enters the gas of Pulverized Coal Bin in order to heating;
At described second pipe flow control element is installed, this flow control element be one section internal diameter less than the pipeline of the first pipeline or second pipe internal diameter, or choker-line, or orifice plate;
At described pipeline variable valve is installed, variable valve has top hole pressure to be regulated and cutting function, pressure or the flow of control pipeline;
Reduce or cut off new source of the gas to the supply of the gas of Pulverized Coal Bin bottom the first nozzle or second nozzle by reverse checkvalve, well heater, flow control element and variable valve.
6. blast-furnace coal powder injection method as claimed in claim 5, it is characterized in that: described hydathode, well heater, reverse checkvalve, flow control element also can be installed on the pipeline that communicates with the tank of jetting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210546591.3A CN102978310B (en) | 2012-12-17 | 2012-12-17 | Coal powder injection method for blast furnace |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210546591.3A CN102978310B (en) | 2012-12-17 | 2012-12-17 | Coal powder injection method for blast furnace |
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| CN102978310A true CN102978310A (en) | 2013-03-20 |
| CN102978310B CN102978310B (en) | 2014-09-10 |
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| CN201210546591.3A Expired - Fee Related CN102978310B (en) | 2012-12-17 | 2012-12-17 | Coal powder injection method for blast furnace |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070074643A1 (en) * | 2005-10-04 | 2007-04-05 | Future Energy Gmbh | Method and device for the regulated feed of pulverized fuel to an entrained flow gasifier |
| CN101781692A (en) * | 2009-11-06 | 2010-07-21 | 中冶赛迪工程技术股份有限公司 | Blast-furnace coal powder injection method and system thereof |
| CN102212628A (en) * | 2011-05-31 | 2011-10-12 | 武汉钢铁(集团)公司 | Spare pulverized coal supply method and system for blast furnace pulverized coal blowing |
| CN102787191A (en) * | 2012-08-21 | 2012-11-21 | 中冶南方工程技术有限公司 | System and process for pulverized coal injection of blast furnace |
-
2012
- 2012-12-17 CN CN201210546591.3A patent/CN102978310B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070074643A1 (en) * | 2005-10-04 | 2007-04-05 | Future Energy Gmbh | Method and device for the regulated feed of pulverized fuel to an entrained flow gasifier |
| CN101781692A (en) * | 2009-11-06 | 2010-07-21 | 中冶赛迪工程技术股份有限公司 | Blast-furnace coal powder injection method and system thereof |
| CN102212628A (en) * | 2011-05-31 | 2011-10-12 | 武汉钢铁(集团)公司 | Spare pulverized coal supply method and system for blast furnace pulverized coal blowing |
| CN102787191A (en) * | 2012-08-21 | 2012-11-21 | 中冶南方工程技术有限公司 | System and process for pulverized coal injection of blast furnace |
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| CN102978310B (en) | 2014-09-10 |
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Effective date of registration: 20170711 Address after: 430083, Gate No. 2, Qingshan District, Hubei, Wuhan Patentee after: Wuhan iron and Steel Company Limited Address before: 430080 Wuhan, Hubei Friendship Road, No. 999, Wuchang Patentee before: Wuhan Iron & Steel (Group) Corp. |
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Granted publication date: 20140910 Termination date: 20181217 |