CN1202597A - Preparation collection and transfer technology for coal mill - Google Patents
Preparation collection and transfer technology for coal mill Download PDFInfo
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- CN1202597A CN1202597A CN 98113583 CN98113583A CN1202597A CN 1202597 A CN1202597 A CN 1202597A CN 98113583 CN98113583 CN 98113583 CN 98113583 A CN98113583 A CN 98113583A CN 1202597 A CN1202597 A CN 1202597A
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Abstract
The present technology adopts high density dust bag type collector as the coal powder collecting equipment, middle material distributing compartment to distribute material and natural chute to transfer coal powder, and the said arrangement has short coal powder collecting and transferring flow path, low power consumption, less maintenance job and less environmental pollution.
Description
The invention belongs to coal and grind and collect transportation art fully, be specifically related to a kind of new technology of the coal dust in the coal grinding system being collected conveying.
The equipment and the technology of coal powder collection conveying for a long time are that environmental protection field relevant technologies and equipment are directly indiscriminately imitated usefulness basically.Yet the coal dust dust collection device belongs to production equipment, has concurrently to collect product and two kinds of functions of environmental protection, and the coal powder density of grinding machine pulverized coal preparation system is up to 300～1300g/Nm
3, higher more than tens of times than the dust content in environmental protection field, simple dustproof or environmental protection equipment is difficult to be competent at, so have to adopt multistage dust collection device to satisfy the needs of production and environmental protection.Usually three grades of equipment that adopt two stage cyclone (or multitube) to add sack cleaner in coal powder-grinding system gather dust, and often are provided with the two-stage blower fan.Bring problems thus: 1. pulverized coal preparation system resistance height, power consumption are big; 2. multistage gathering dust makes defeated powder equipment many, and equipment failure rate increases, and because defeated powder flow is big, and seriously polluted when safeguarding, difficulty is big, the maintenance cost height causes the utilization rate of integral device to reduce; 3. exhaust emissions exceeds standard, and causes coal dust to run off, and environmental pollution is serious.The coal dust that each dust collection device is collected is by many conveyor delivery, and conveying process is many, and the maintenance, repair workload is big, the equipment failure rate height, seriously restrict the operating rate of producing, produced the hard friction when machinery is failed powder in addition, can not adapt to the safety in production of bituminous coal powder.
The objective of the invention is to provide that a kind of flow process is short, energy consumption is low, the maintenance, repair amount is few, and the coal that can satisfy production and environmental protection needs grinds and is equipped with the collecting and conveying system new technology at the deficiency that above-mentioned existing technology exists.
Technical matters of the present invention is as follows: the hot flue gas of A, hot-blast stove production only needs just directly to enter coal mill through one group of control valve; B, raw coal grind in coal mill, drying; Coal dust after C, the grinding and hot flue gas are brought into mill separator and select powder; D, coarse grained coal dust return in the coal mill and grind; E, qualified fine powder enter in the high concentrate dust bag collector, and the gas powder separates; F, collected coal dust enter the intermediate section feed bin through flapper, evenly sub-material; G, powder are transported to the powder storehouse by natural elephant trunk; H, tail gas enter atmosphere through air exhauster, chimney.
The patented product high concentrate dust bag collector (patent No. ZL 96234810.4) of this process using Safety Environment Protection Research Inst., Ministry of Metallurgical Industry, is three grades of traditional work simplifications of gathering dust the one-level technology of gathering dust, and SR descends, and energy consumption is little, operating cost is low, and the plant maintenance amount is little.Adopt the intermediate section feed bin to add the defeated powder of nature elephant trunk and substitute the defeated powder of original many machineries, reduced pollution and maintenance, repair workload, it is minimum that energy consumption is reduced to, and do not produce the hard friction.This technological process is the shortest, and efficient, energy-conservation, safety, health have satisfied production and environmental protection requirement well.
Accompanying drawing 1: this preparation collection and transfer technology for coal mill flow chart
Below in conjunction with accompanying drawing technological process of the present invention is further elaborated.
This preparation collection and transfer technology for coal mill flow process is: the hot flue gas that A, hot-blast stove 1 are produced only needs just directly to enter coal mill 2 through one group of control valve; B, raw coal grind in coal mill 2, drying; Coal dust after C, the grinding and hot flue gas are brought into mill separator 3 and select powder; D, coarse grained coal dust return in the coal mill 2 and grind; E, qualified fine powder enter in the high concentrate dust bag collector 4, and the gas powder separates; F, collected coal dust enter intermediate section feed bin 5 through flapper, evenly sub-material; G, powder are transported to powder storehouse 7 by natural elephant trunk 6 again; H, tail gas enter atmosphere through air exhauster 8, chimney 9.
This preparation collection and transfer technology for coal mill, adopt high concentrate dust bag collector 4 one-level dust collection devices to replace original three grades of dust collection devices, SR is reduced significantly, the hot-blast stove 1 that can realize heating system like this provides dry wind regime to coal mill 2 one to one, the adjusting of wind-warm syndrome no longer is subjected to the restriction of any condition, and can all save the air-introduced machine of high-temperature area, valve, whole process system only by former coal dust air exhauster 8 as power, realize full negative pressure production.Intermediate section feed bin 5 can compile the coal dust that 2～3 cover dust collecting systems are collected simultaneously, such 2～3 cover dust collecting systems can be failed powder system by a shared cover, nature elephant trunk 6 can be carried in the powder storehouse 7, powder to 1～10 any one, has realized that multiple spot fails powder, has simplified the conveying flow process of coal dust greatly.Owing to natural elephant trunk 6 landlines are longer, need rationally to determine the size of nature elephant trunk 6 and horizontal plane angle, should prevent from conveying freely not to be resulted in blockage because of angle is too small, avoid angle excessive again, make dust collecting system be provided with too high and the increase investment.This defeated powder system nature elephant trunk 6 only is 42 ° with the angle of horizontal plane, and far below 60 ° of code requirement, not only defeated powder is unimpeded, and has reduced equipment investment.Adopt intermediate section feed bin 5 to add the mode that nature elephant trunk 6 multiple spots are carried, system failure rate is close to zero.Also disposed coal dust pocket type gathering system computer controller according to the requirement of this technology, the automatic Detection ﹠ Controling and the fault alarm of this technology operating condition have been realized, make that coal dust is carried, the adjusting outfit is very flexible, only need crawl the corresponding button just coal dust can be delivered to fast any one powder storehouse 7.
Adopt the coal of this technology to grind collecting and conveying system fully, the on average low 5.0mg/Nm of exhaust dust content
3, far below the setting 100mg/Nm of national environmental protection method
3, can reduce the finished product pulverized coal flow every year and fail to keep an appointment 139 tons.Dust collection device is reduced to one-level by three grades, corresponding flue length also is kept to original 1/8, the equipment resistance of high concentrate dust bag collector 4 is stabilized in below the 1200Pa, thereby SR descends, make the operating current of the supporting 6KV motor of air exhauster 8 reduce 25A, 130.92 ten thousand Kwh that can economize on electricity every year amount to powder economize on electricity 6.7Kwh per ton.Defeated powder system has been cancelled tens of equipment, and 87.35 ten thousand kw can economize on electricity the whole year.Realize the configuration one to one of heat supply and preparation, go to transfer two air-introduced machine annual operating costs can save 19.27 ten thousand yuan.Can reduce 114.03 ten thousand yuan of Maintenance and Repair expenses the whole year.
Claims (5)
1. preparation collection and transfer technology for coal mill, its feature process is as follows successively:
The hot flue gas that A, hot-blast stove (1) are produced only needs just directly to enter coal mill (2) through one group of control valve;
B, raw coal grind in coal mill (2), drying;
Coal dust after C, the grinding and hot flue gas are brought into mill separator (3) and select powder;
D, coarse grained coal dust return in the coal mill (2) and grind;
E, qualified fine powder enter in the high concentrate dust bag collector (4), and the gas powder separates;
F, collected coal dust enter intermediate section feed bin (5) through flapper, evenly sub-material;
G, powder are transported to powder storehouse (7) by natural elephant trunk (6);
H, tail gas enter atmosphere through air exhauster (8), chimney (9).
2. preparation collection and transfer technology for coal mill as claimed in claim 1 is characterized in that hot-blast stove (1) provides dry wind regime to coal mill (2) one to one.
3. preparation collection and transfer technology for coal mill as claimed in claim 1 is characterized in that intermediate section feed bin (5) can compile the coal dust that 2～3 cover dust collecting systems are collected simultaneously.
4. preparation collection and transfer technology for coal mill as claimed in claim 1 is characterized in that nature elephant trunk (6) can carry any one in the powder storehouse (7), powder to 1～10.
5. preparation collection and transfer technology for coal mill as claimed in claim 1 is characterized in that the nature elephant trunk (6) and the angle of horizontal plane are 42 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98113583 CN1202597A (en) | 1998-06-02 | 1998-06-02 | Preparation collection and transfer technology for coal mill |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98113583 CN1202597A (en) | 1998-06-02 | 1998-06-02 | Preparation collection and transfer technology for coal mill |
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| Publication Number | Publication Date |
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| CN1202597A true CN1202597A (en) | 1998-12-23 |
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| CN 98113583 Pending CN1202597A (en) | 1998-06-02 | 1998-06-02 | Preparation collection and transfer technology for coal mill |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102559319A (en) * | 2011-12-22 | 2012-07-11 | 中信重工机械股份有限公司 | Integral process and device for crushing, drying, forming and upgrading lignite containing moisture |
| CN102719292A (en) * | 2012-07-03 | 2012-10-10 | 中冶赛迪工程技术股份有限公司 | Process and system for preparing blast furnace pulverized coal injection by utilizing waste gas of hot blast stove only |
| CN102889609A (en) * | 2011-07-20 | 2013-01-23 | 上海机易电站设备有限公司 | Pulverizing system of smoke drying lignite coal steel ball mill |
| CN103688121A (en) * | 2011-07-19 | 2014-03-26 | 巴布考克日立株式会社 | Drying conveyer, and thermal electric power generation system provided with same |
-
1998
- 1998-06-02 CN CN 98113583 patent/CN1202597A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103688121A (en) * | 2011-07-19 | 2014-03-26 | 巴布考克日立株式会社 | Drying conveyer, and thermal electric power generation system provided with same |
| CN102889609A (en) * | 2011-07-20 | 2013-01-23 | 上海机易电站设备有限公司 | Pulverizing system of smoke drying lignite coal steel ball mill |
| CN102889609B (en) * | 2011-07-20 | 2016-03-16 | 上海援梦电力能源科技咨询中心 | Smoke drying steel ball brown-coal milling system |
| CN102559319A (en) * | 2011-12-22 | 2012-07-11 | 中信重工机械股份有限公司 | Integral process and device for crushing, drying, forming and upgrading lignite containing moisture |
| CN102559319B (en) * | 2011-12-22 | 2014-05-28 | 中信重工机械股份有限公司 | Integral process and device for crushing, drying, forming and upgrading lignite containing moisture |
| CN102719292A (en) * | 2012-07-03 | 2012-10-10 | 中冶赛迪工程技术股份有限公司 | Process and system for preparing blast furnace pulverized coal injection by utilizing waste gas of hot blast stove only |
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