CN201434578Y - Drying furnace gas inlet system for coal injection and pulverized coal preparation - Google Patents
Drying furnace gas inlet system for coal injection and pulverized coal preparation Download PDFInfo
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- CN201434578Y CN201434578Y CN2009201282141U CN200920128214U CN201434578Y CN 201434578 Y CN201434578 Y CN 201434578Y CN 2009201282141 U CN2009201282141 U CN 2009201282141U CN 200920128214 U CN200920128214 U CN 200920128214U CN 201434578 Y CN201434578 Y CN 201434578Y
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Abstract
The utility model discloses a drying furnace gas inlet system for coal injection and pulverized coal preparation, which comprises a combustion gas main pipe, a combustion-supporting gas main pipe, a combustion gas branch pipe and a combustion-supporting gas branch pipe. An adjusting valve I and a flow meter I are arranged on the combustion gas main pipe, an adjusting valve II and a flow meter II are arranged on the combustion-supporting gas main pipe, two ends of the combustion gas branch pipe positioned on two sides of the adjusting valve I and the flow meter I are communicated with the combustion gas main pipe, two ends of the combustion-supporting gas branch pipe positioned on two sides of the adjusting valve II and the flow meter II are communicated with the combustion-supporting gas main pipe, and the flow meters and the adjusting valves with flow ranging from one-eighth to one-fourth of that of an original adjusting valve are respectively disposed on the combustion gas branch pipe and the combustion-supporting gas branch pipe. By adopting a small flow adjusting valve to adjust combustion gas and combustion-supporting gas, the gas inlet system achieves more accurate control ofthe combustion gas and the combustion-supporting gas, has more convenient operation, effectively decreases labor strength of operating staff, avoids explosion caused by CO concentration exceeding standard and secondary combustion owing to excessive combustion gas inside a drying furnace and a coal mill, and greatly raises safety performance.
Description
Technical field
The utility model relates to a kind of gas handling system that is used for metallurgy industry, particularly a kind of coal injection and pulverization drying oven gas handling system.
Background technology
In the present metallurgy industry, the iron-smelter coal spraying process comprises that mainly raw coal supply system, coal dust preparation system, injection system and combustion system finish.Pulverizing process mainly utilizes 90%～95% blast-furnace hot-air furnace exhaust to mix with the flue gas of 5%～10% dry combustion furnace, and mixed gas is as the thermal insulation medium in powder process inerting, drying and conveying and powder storehouse.
In the prior art, coal injection and pulverization drying oven gas handling system comprises the combustion gas person in charge and the combustion-supporting gas person in charge that the gas outlet is communicated with drying oven, and combustion gas is provided with control valve and flowmeter on being responsible for, and combustion-supporting gas also is provided with control valve and flowmeter on being responsible for.It is bigger than normal that the combustion gas person in charge and combustion-supporting gas are responsible for the control valve type selecting range of going up installation, main to satisfy the higher demand of blast furnace gas consumption.But the consumption of blast furnace gas is lower when summer, and it is just not too accurate to adopt range control valve bigger than normal to regulate again, can not satisfy the requirement of combustion gas and the accurate mixed combustion of combustion-supporting gas, causes the flow of combustion-supporting gas reality to regulate from motion tracking.Therefore, the control valve that control valve that the production operation personnel must repeatedly be responsible for to the Field adjustment combustion gas and combustion-supporting gas are responsible for, the situation of flame burning judges that its combustion gas mixing is more normal than whether in the dry according to the observation then furnace chamber, keeps normal production with this.There is following defective in above-mentioned coal injection and pulverization drying oven gas handling system: one, regulate range control valve inaccuracy bigger than normal, can only make the situation of flame combustion in the dry furnace chamber dry up and judge that operation is inconvenience very, also increase labor intensity of operating personnel simultaneously; Two, the adjusting of combustion gas and combustion-supporting gas is inaccurate, if combustion gas is excessive, will cause the CO concentration over-standard, the coal pulverizer that a large amount of combustion gas simultaneously enters drying oven and postorder causes that second-time burning produces the phenomenon of setting off firecrackers, if what coal pulverizer ground is inflammable and explosive bituminous coal, consequence will be more serious.
Therefore, be badly in need of coal injection and pulverization drying oven gas handling system of the prior art is improved, make more accurate, the more convenient operation of air inlet adjustment, improve security performance simultaneously.
The utility model content
In view of this, the utility model provides a kind of coal injection and pulverization drying oven gas handling system, adopts arm accurately to regulate, and air inlet adjustment is more accurate, operation is also more convenient, avoid combustion gas and the combustion-supporting gas can not strict phenomenon, improved security performance greatly by the mixing ratio burning.
The coal injection and pulverization drying oven gas handling system that the utility model provides, comprise the combustion gas person in charge and the combustion-supporting gas person in charge that the gas outlet is communicated with drying oven, described combustion gas is provided with control valve I and flowmeter I on being responsible for, combustion-supporting gas is provided with control valve II and flow Table II on being responsible for, also comprise combustion gas arm and combustion-supporting gas arm, the two ends of described combustion gas arm are positioned at the outside of control valve I and flowmeter I and are communicated with the combustion gas person in charge, and it is the control valve III of control valve I flow 1/8～1/4 that flow Table III and flow are set on the combustion gas arm; The two ends of described combustion-supporting gas arm are positioned at the outside of control valve II and flow Table II and are communicated with the combustion-supporting gas person in charge, and it is the control valve IV of control valve II flow 1/8～1/4 that flow Table IV and flow are set on the combustion-supporting gas arm.
Further, also comprise hybrid chamber, the gas outlet that the described combustion gas person in charge and combustion-supporting gas are responsible for is communicated with drying oven by hybrid chamber;
Further, the described combustion gas person in charge's inlet end is provided with electronic stop valve and/or pneumatic cut-off valve;
Further, also comprise the combustion-supporting gas air exhauster, the air inlet that described combustion-supporting gas is responsible for is communicated with the gas outlet of combustion-supporting gas air exhauster.
The beneficial effects of the utility model: coal injection and pulverization drying oven gas handling system of the present utility model adopts on combustion gas is responsible for and sets up the combustion gas arm, combustion-supporting gas is set up the combustion-supporting gas arm on being responsible for, and the control valve that flow is former regulating valve flow 1/8～1/4 is set on combustion gas arm and combustion-supporting gas arm, consumption at blast furnace gas is lower, regulate by control valve for small flows, make combustion gas and combustion-supporting gas strictness mixing ratio burning on request, not only the control of combustion gas and combustion-supporting gas is more accurate, and operating personnel only need once regulate by control valve for small flows and finish, easy to operate, reduced labor intensity of operating personnel effectively, avoid the CO concentration over-standard simultaneously and combustion gas is excessive in the coal pulverizer of drying oven and postorder causes that second-time burning produces the phenomenon of setting off firecrackers, and has improved security performance greatly.
Description of drawings
Accompanying drawing is a structural representation of the present utility model.
The specific embodiment
Accompanying drawing is a structural representation of the present utility model, and as shown in the figure: coal injection and pulverization drying oven gas handling system comprises the combustion gas person in charge 1, the combustion-supporting gas person in charge 2, hybrid chamber 13, combustion gas arm 7 and combustion-supporting gas arm 8.The combustion gas person in charge 1 and combustion-supporting gas are responsible for 2 gas outlets and are communicated with hybrid chamber 13, and hybrid chamber 13 is communicated with drying oven 14, and the gases that the combustion gas person in charge 1 and combustion-supporting gas are responsible for conveying in 2 carry out hybrid chamber 13 and mixing in hybrid chamber 13, enter drying oven 14 internal combustion again.Combustion gas is responsible on 1 control valve I3 and flowmeter I4 is set, the two ends of combustion gas arm 7 are positioned at the outside of control valve I3 and flowmeter I4 and are responsible for 1 with combustion gas and are communicated with, and it is the control valve III9 of control valve I3 flow 1/8～1/4 that flowmeter III10 and flow are set on the combustion gas arm 7; Combustion-supporting gas is responsible on 2 control valve II5 and flowmeter II6 is set, the two ends of combustion-supporting gas arm 8 are positioned at the both sides of control valve II5 and flowmeter II6 and are responsible for 2 with combustion-supporting gas and are communicated with, and it is the control valve IV11 of control valve II5 flow 1/8～1/4 that flowmeter IV12 and flow are set on the combustion-supporting gas arm 8.
Set up combustion gas arm 7 by being responsible on 1 in former combustion gas, combustion-supporting gas is responsible on 2 and is set up combustion-supporting gas arm 8, when the large usage quantity of blast furnace gas, the combustion gas person in charge 1 and combustion gas arm 7 use simultaneously, at first the control valve I3 on 1 is responsible in the coarse adjustment combustion gas, control valve III9 on the fine tuning combustion gas arm 7 again adjusts combustion-supporting gas simultaneously and is responsible for control valve II5 on 2 and the control valve IV11 on the combustion-supporting gas arm 8, realizes the accurate proportioning of combustion gas and combustion-supporting gas; When the consumption of blast furnace gas is low, adopt the control valve III9 of combustion gas arm 7 to regulate, the control valve IV11 that adjusts simultaneously on the combustion-supporting gas arm 8 just can satisfy the requirement of hanging down consumption.So not only can realize the accurate proportioning of combustion-supporting gas and combustion gas, and operating personnel operate and adjusting is also convenient, have improved security performance simultaneously greatly.
In the present embodiment, the flow of the control valve III9 that installs on the combustion gas arm 7 is 1/8～1/4 of a control valve I3 flow, and the flow of the control valve IV11 that installs on the combustion-supporting gas arm 8 is a control valve II5 flow 1/8～1/4.If the flow of control valve III9 is less than 1/8 of control valve I3 flow, the flow of control valve IV11 is during less than control valve II5 flow 1/8, and it is longer to regulate the used time of control valve control flow, inconvenient operation; If the flow of control valve III9 is greater than 1/4 of control valve I3 flow, the flow of control valve IV11 is during greater than control valve II5 flow 1/4, regulate control valve control flow inaccuracy, cause that combustion gas is excessive in the coal pulverizer of CO concentration over-standard or drying oven and postorder causes that second-time burning produces the phenomenon of setting off firecrackers.
The combustion gas person in charge 1 inlet end is provided with electronic stop valve 15 and pneumatic cut-off valve 16, when control valve on the combustion gas person in charge 1 or combustion gas arm 7 or flowmeter damage, close fuel gas by electronic stop valve 15 or pneumatic cut-off valve 16, be convenient to the maintenance of control valve or flowmeter, because of coal gas is often adopted in combustion gas, dangerous big, thus electronic stop valve 15 and pneumatic cut-off valve 16 are set simultaneously, to improve security performance.
Present embodiment also adopts combustion-supporting gas air exhauster 17, and the combustion-supporting gas person in charge 2 air inlet is communicated with the gas outlet of combustion-supporting gas air exhauster 17.Adopt combustion-supporting gas air exhauster 17 is set on the spot, combustion-supporting gas air exhauster 17 extracting airs are as combustion-supporting gas, and combustion-supporting gas obtains conveniently.
Explanation is at last, above embodiment is only unrestricted in order to the explanation the technical solution of the utility model, although the utility model is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the aim and the scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.
Claims (4)
1. coal injection and pulverization drying oven gas handling system, comprise the combustion gas person in charge (1) and the combustion-supporting gas person in charge (2) that the gas outlet is communicated with drying oven (14), described combustion gas is responsible on (1) control valve I (3) and flowmeter I (4) is set, combustion-supporting gas is responsible on (2) control valve II (5) and flow Table II (6) is set, it is characterized in that: also comprise combustion gas arm (7) and combustion-supporting gas arm (8), the two ends of described combustion gas arm (7) are positioned at the both sides of control valve I (3) and flowmeter I (4) and are responsible for (1) with combustion gas and are communicated with, and it is the control valve III (9) of control valve I (3) flow 1/8～1/4 that flow Table III (10) and flow are set on the combustion gas arm (7); The two ends of described combustion-supporting gas arm (8) are positioned at the both sides of control valve II (5) and flow Table II (6) and are responsible for (2) with combustion-supporting gas and are communicated with, and it is the control valve IV (11) of control valve II (5) flow 1/8～1/4 that flow Table IV (12) and flow are set on the combustion-supporting gas arm (8).
2. coal injection and pulverization drying oven gas handling system according to claim 1 is characterized in that: also comprise hybrid chamber (13), the gas outlet that (1) and the combustion-supporting gas person in charge (2) are responsible in described combustion gas is communicated with drying oven (14) by hybrid chamber (13).
3. coal injection and pulverization drying oven gas handling system according to claim 2 is characterized in that: the inlet end that (1) is responsible in described combustion gas is provided with electronic stop valve (15) and/or pneumatic cut-off valve (16).
4. according to the described coal injection and pulverization drying oven of each claim gas handling system in the claim 1 to 3, it is characterized in that: also comprise combustion-supporting gas air exhauster (17), the air inlet that described combustion-supporting gas is responsible for (2) is communicated with the gas outlet of combustion-supporting gas air exhauster (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201282141U CN201434578Y (en) | 2009-07-28 | 2009-07-28 | Drying furnace gas inlet system for coal injection and pulverized coal preparation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201282141U CN201434578Y (en) | 2009-07-28 | 2009-07-28 | Drying furnace gas inlet system for coal injection and pulverized coal preparation |
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| Publication Number | Publication Date |
|---|---|
| CN201434578Y true CN201434578Y (en) | 2010-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201282141U Expired - Fee Related CN201434578Y (en) | 2009-07-28 | 2009-07-28 | Drying furnace gas inlet system for coal injection and pulverized coal preparation |
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| CN (1) | CN201434578Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320569A (en) * | 2013-05-09 | 2013-09-25 | 马钢控制技术有限责任公司 | Oxygen pressure adjustment apparatus and adjustment method for electric furnace |
| CN106556005A (en) * | 2016-11-21 | 2017-04-05 | 中国五环工程有限公司 | The burning utilization of low heat value fixed gas and oxygen-enriched combusting method |
-
2009
- 2009-07-28 CN CN2009201282141U patent/CN201434578Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103320569A (en) * | 2013-05-09 | 2013-09-25 | 马钢控制技术有限责任公司 | Oxygen pressure adjustment apparatus and adjustment method for electric furnace |
| CN103320569B (en) * | 2013-05-09 | 2015-04-01 | 马钢控制技术有限责任公司 | Adjustment method for oxygen pressure adjustment apparatus by electric furnace |
| CN106556005A (en) * | 2016-11-21 | 2017-04-05 | 中国五环工程有限公司 | The burning utilization of low heat value fixed gas and oxygen-enriched combusting method |
| CN106556005B (en) * | 2016-11-21 | 2019-03-15 | 中国五环工程有限公司 | The burning utilization of low heat value fixed gas and oxygen-enriched combusting method |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100331 Termination date: 20130728 |