CN102978310B - Coal powder injection method for blast furnace - Google Patents
Coal powder injection method for blast furnace Download PDFInfo
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- CN102978310B CN102978310B CN201210546591.3A CN201210546591A CN102978310B CN 102978310 B CN102978310 B CN 102978310B CN 201210546591 A CN201210546591 A CN 201210546591A CN 102978310 B CN102978310 B CN 102978310B
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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 is generally made up of two to three injection systems, is arranged in juxtaposition.The main processes of coal powder injection is generally and packs coal dust into winding-up tank by powder storehouse, close pressurising in charging valve and the backward tank of diffusion valve, after reaching certain pressure, open coal powder injection valve, coal dust in winding-up tank is sprayed into blast furnace, after a system winding-up operation finishes, close coal powder injection valve, open diffusion valve, nitrogen in tank is put into the cloth bag collection machine of Pulverized Coal Bin top or pulverized coal preparation system, the coal dust wherein containing is recovered, and nitrogen enters atmosphere without any utilization.
Existing a kind of technology that reclaims the nitrogen in winding-up tank: the winding-up tank that winding-up is finished is communicated with a gas-holder, a pressed gas part in winding-up tank enters gas-holder and stores, in the time having winding-up tank to need pressurising, gas-holder is communicated with this winding-up tank, a part of gas in gas-holder enters this winding-up tank, thereby has reclaimed a part of nitrogen.The weak point of the method is that technique is more complicated, needs investment gas-holder, takes up room larger, and the rate of recovery is not high.
Also having a kind of method of jetting tank nitrogen recycling is that a blast furnace arranges three injection systems, by not pressure release immediately of winding-up tank complete winding-up wherein, need the winding-up tank of pressurising to be connected but this tank and another are installed to powder, a part of pressed gas enters needs the winding-up of pressurising tank to be utilized.There is complex process in the method, deficiency that rate of recovery of nitrogen is not high equally.
Summary of the invention
The technical problem to be solved in the present invention is, for the above-mentioned defect existing in prior art, a kind of blast-furnace coal powder injection method is provided, and the method by simple structure, simple technical process and lower initial outlay realize the nitrogen recycling utilization ratio of higher winding-up tank.
The present invention for solving the problems of the technologies described above adopted technical scheme is:
A kind of blast-furnace coal powder injection method, comprises the following steps:
A, the coal dust in Pulverized Coal Bin is packed in the winding-up tank of injection system;
B, use the high pressure gas that obtain from new source of the gas by the pressurization of winding-up tank and coal dust is sprayed into blast furnace;
The nozzle that C, gas by winding-up in tank are directed at 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 be connected for the first pipeline that passes into new source of the gas, the outlet of the first nozzle is in Pulverized Coal Bin; Described second nozzle is connected with second pipe, and described second pipe communicates with the pipeline being connected on winding-up tank; The gas of jetting in tank in described step C is directed at second nozzle and then is sprayed into Pulverized Coal Bin by pipeline, second pipe successively.
In such scheme, also comprise step D, in carrying out step C, reduce or cut off the supply of the gas of new source of the gas to Pulverized Coal Bin lower nozzle.
In such scheme, in described step D, reduce source of the gas supply and realize in the following way: described the first pipeline is communicated with second pipe, shares the first nozzle and second nozzle by the gas of the first pipeline with by the gas of second pipe; Gas in winding-up tank is directed at the first nozzle by pipeline, second pipe and the first pipeline successively, replaces the gas that a part is new, thereby reduces the consumption of Pulverized Coal Bin lower nozzle to new source of the gas.
In such scheme, described step D can also realize in the following way:
On described second pipe, reverse checkvalve is installed, its direction is to allow gas to flow in Pulverized Coal Bin, in order to prevent that the new source of the gas that passes into the first pipeline from entering the pipeline that leads to the tank of jetting;
Mounting heater on described second pipe, enters the gas of Pulverized Coal Bin in order to heating;
On described second pipe, flow control element is installed, this flow control element is the pipeline that one section of internal diameter is less than the first pipeline or second pipe internal diameter, or choker-line, or orifice plate;
On pipeline on described winding-up tank, variable valve is installed, variable valve has top hole pressure and regulates and cutting function, controls pressure or the flow of pipeline;
Reduce or cut off the supply of the gas of new source of the gas to 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 arranged on the pipeline communicating with the tank of jetting.
Pulverized Coal Bin is used for storing coal suitable for blowing powder, and the first pipeline is for introducing the first nozzle by new nitrogen, and the first nozzle is arranged on the bottom of Pulverized Coal Bin, plays rheomorphism.The diffusion valve of injection system is for putting into Pulverized Coal Bin by the gas in winding-up tank by diffuse channel.Hydathode is installed on second pipe, in order to the moisture of draining in diffused gas.Well heater is installed on second pipe, enters the nitrogen of Pulverized Coal Bin in order to heating.Reverse checkvalve is installed on second pipe, in order to prevent that the new source of the gas that passes into the first pipeline from entering the pipeline that leads to the tank of jetting.Control the pressure of pipeline or the function of flow and realized by variable valve, variable valve has top hole pressure and regulates and cutting function; Also can realize by flow control element is installed on second pipe, this flow control element can be the pipeline that one section of internal diameter is less than the first pipeline or second pipe internal diameter, can be also choker-line, can be also orifice plate.Hydathode, well heater, reverse checkvalve, flow control element can be arranged on pipeline, also can be arranged on second pipe, and its built-up sequence, quantity do not limit.On pipeline or second pipe, some parts can be according to circumstances installed, other valve also can be installed.
Be communicated with the second pipe that reclaims nitrogen by 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, first the coal dust in Pulverized Coal Bin is packed in the winding-up tank of injection system; Then use the high pressure gas that obtain from new source of the gas through valve, winding-up tank is pressurizeed and coal dust is sprayed into blast furnace; Then by winding-up, the gas in tank is directed at Pulverized Coal Bin bottom the first nozzle or second nozzle spray into Pulverized Coal Bin, reduce simultaneously or cut off the supply of the gas of new source of the gas to Pulverized Coal Bin bottom the first nozzle or second nozzle by reverse checkvalve, well heater, hydathode, flow control element and variable valve; Finally, when winding-up operation finishes to proceed to while diffusing operation, open variable valve, in winding-up tank, gas enters the second nozzle of bottom, powder storehouse through pipeline and second pipe, 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 winding-up tank is introduced to the first nozzle of Pulverized Coal Bin by other element on pipeline and pipeline, replaced the new source of the gas of a part, thereby reduce consumption of air source.
Brief description of the 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.
In 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 channels, 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 Pulverized Coal Bin is packed in the winding-up tank of injection system;
B, use the high pressure gas that obtain from new source of the gas by the pressurization of winding-up tank and coal dust is sprayed into blast furnace;
The nozzle that C, gas by winding-up in tank are directed at Pulverized Coal Bin bottom sprays into Pulverized Coal Bin;
D, in carrying out step C, reduce or cut off the supply of the gas of new source of the gas to Pulverized Coal Bin lower nozzle.
Shown in Fig. 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; First pipeline 2 one end 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 end are connected with the second nozzle 5 being installed on the bottom bulkhead of Pulverized Coal Bin 1, and the other end is connected with pipeline 11, and pipeline 11 the other ends are connected with winding-up tank 15, and variable valve 10 is installed on pipeline 11.
Shown in Fig. 2, on described second pipe 4, flow control element 9 is installed, this flow control element 9 is pipelines that one section of internal diameter is less than the first pipeline 2 or second pipe 4 internal diameters, or choker-line, or orifice plate, control the pressure of pipeline 11 or the function of flow and also can be realized by variable valve 10, this valve can have adjusting and cutting function.
On described second pipe 4, hydathode 8 is installed.
On described second pipe 4, well heater 7 is installed.
On described second pipe 4, reverse checkvalve 6 is installed, its direction is to allow gas to flow to Pulverized Coal Bin 1 is interior.
Described second pipe 4 is connected with the first pipeline 2, shares the first nozzle 3 and second nozzle 5 by the gas of the first pipeline 2 with by the gas of second pipe 4.
One end that described pipeline 11 connects winding-up tank 15 is provided with special purpose interface, or shares an interface with the diffuse channel 12 of winding-up tank 15.
In embodiment, injection system 14 is 2.
Pulverized Coal Bin 1 is for storing coal suitable for blowing powder, and the first pipeline 2 is arranged on the bottom of Pulverized Coal Bin 1 for new nitrogen being introduced to the first nozzle 3, the first nozzles 3, plays rheomorphism.The diffusion valve 16 of injection system 14 is for putting into Pulverized Coal Bin 1 by the gas in winding-up tank 15 by diffuse channel 12.Hydathode 8 is installed on second pipe 4, in order to the moisture of draining in diffused gas.Well heater 7 is installed on second pipe 4, enters the nitrogen of Pulverized Coal Bin 1 in order to heating.Reverse checkvalve 6 is installed on second pipe 4, in order to prevent that the new source of the gas that passes into the first pipeline 2 from entering the pipeline 11 that leads to the tank 15 of jetting.Control the pressure of pipeline 11 or the function of flow and realized by variable valve 10, variable valve 10 has top hole pressure and regulates and cutting function; Also can realize by flow control element 9 is installed on second pipe 4, this flow control element 9 can be the pipeline that one section of internal diameter is less than the first pipeline 2 or second pipe 4 internal diameters, can be also choker-line, can be also orifice plate.Hydathode 8, well heater 7, reverse checkvalve 6, flow control element 9 can be arranged on pipeline 11, also can be arranged on second pipe 4, and its built-up sequence, quantity do not limit.On pipeline 11 or second pipe 4, some parts can be according to circumstances installed, other valve also can be installed.
Can be communicated with the second pipe 4 that reclaims nitrogen by 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, first the coal dust in Pulverized Coal Bin 1 is packed in the winding-up tank 15 of injection system 14; Then use the high pressure gas that obtain from new source of the gas through valve 16, winding-up tank 15 is pressurizeed and coal dust is sprayed into blast furnace; Then the first nozzle 3 or the second nozzle 5 that the gas in winding-up tank 15 are directed to Pulverized Coal Bin 1 bottom spray into Pulverized Coal Bin 1, reduce simultaneously or cut off the supply of the gas of new source of the gas to Pulverized Coal Bin 1 bottom the first nozzle 3 or second nozzle 5 by reverse checkvalve 6, well heater 7, hydathode 8, flow control element 9 and variable valve 10; The operation of finally jetting finishes will proceed to while diffusing operation, open variable valve 10, the interior gas of winding-up tank 15 enters 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 the nitrogen in winding-up tank 15 to be introduced to 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 in embodiment is nitrogen, can certainly select other suitable gas.
Above-described is only 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 the scope of the claims changes, and still belongs to protection scope of the present invention.
Claims (5)
1. a blast-furnace coal powder injection method, comprises the following steps: A, the coal dust in Pulverized Coal Bin is packed in the winding-up tank of injection system; B, use the high pressure gas that obtain from new source of the gas by the pressurization of winding-up tank and coal dust is sprayed into blast furnace, it is characterized in that: also comprise step C, the gas in winding-up tank is directed to the nozzle of Pulverized Coal Bin bottom and then sprays into Pulverized Coal Bin;
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 be connected for the first pipeline that passes into new source of the gas, the outlet of the first nozzle is in Pulverized Coal Bin; Described second nozzle is connected with second pipe, and described second pipe communicates with the pipeline being connected on winding-up tank; The gas of jetting in tank in described step C is directed at second nozzle and then is sprayed into Pulverized Coal Bin by pipeline, second pipe successively.
2. blast-furnace coal powder injection method as claimed in claim 1, is characterized in that: also comprise step D, in carrying out step C, reduce or cut off the supply of the gas of new source of the gas to Pulverized Coal Bin lower nozzle.
3. blast-furnace coal powder injection method as claimed in claim 2, it is characterized in that: in described step D, reduce source of the gas supply and realize in the following way: described the first pipeline is communicated with second pipe, shares the first nozzle and second nozzle by the gas of the first pipeline with by the gas of second pipe; Gas in winding-up tank is directed at the first nozzle by pipeline, second pipe and the first pipeline successively, replaces the gas that a part is new, thereby reduces the consumption of Pulverized Coal Bin lower nozzle to new source of the gas.
4. blast-furnace coal powder injection method as claimed in claim 2, is characterized in that: described step D can also realize in the following way:
On described second pipe, reverse checkvalve is installed, its direction is to allow gas to flow in Pulverized Coal Bin, in order to prevent that the new source of the gas that passes into the first pipeline from entering the pipeline that leads to the tank of jetting;
Mounting heater on described second pipe, enters the gas of Pulverized Coal Bin in order to heating;
On described second pipe, flow control element is installed, this flow control element is the pipeline that one section of internal diameter is less than the first pipeline or second pipe internal diameter, or choker-line, or orifice plate;
On pipeline on described winding-up tank, variable valve is installed, variable valve has top hole pressure and regulates and cutting function, controls pressure or the flow of pipeline;
Reduce or cut off the supply of the gas of new source of the gas to Pulverized Coal Bin bottom the first nozzle or second nozzle by reverse checkvalve, well heater, flow control element and variable valve.
5. blast-furnace coal powder injection method as claimed in claim 4, is characterized in that: on the pipeline that winding-up tank communicates, hydathode is installed, described well heater, reverse checkvalve, flow control element also can be arranged on the pipeline communicating 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 CN102978310A (en) | 2013-03-20 |
| CN102978310B true CN102978310B (en) | 2014-09-10 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202005021660U1 (en) * | 2005-10-04 | 2009-03-05 | Siemens Aktiengesellschaft | Apparatus for the controlled supply of combustible dust in an air flow gasifier |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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| CN102978310A (en) | 2013-03-20 |
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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 |
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