CN205603616U - Granular coal pulverizing system - Google Patents
Granular coal pulverizing system Download PDFInfo
- Publication number
- CN205603616U CN205603616U CN201620040301.1U CN201620040301U CN205603616U CN 205603616 U CN205603616 U CN 205603616U CN 201620040301 U CN201620040301 U CN 201620040301U CN 205603616 U CN205603616 U CN 205603616U
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- CN
- China
- Prior art keywords
- pulverized coal
- flue gas
- butterfly valve
- coal preparation
- electric butterfly
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 239000003245 coal Substances 0.000 title claims abstract description 79
- 238000010298 pulverizing process Methods 0.000 title abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 25
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000003546 flue gas Substances 0.000 claims abstract description 12
- 238000002360 preparation method Methods 0.000 claims description 48
- 239000000567 combustion gas Substances 0.000 claims description 18
- 235000010627 Phaseolus vulgaris Nutrition 0.000 claims description 17
- 244000046052 Phaseolus vulgaris Species 0.000 claims description 17
- 239000000779 smoke Substances 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 15
- 239000007789 gas Substances 0.000 abstract description 13
- 238000003723 Smelting Methods 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000002817 coal dust Substances 0.000 description 18
- 238000002347 injection Methods 0.000 description 10
- 239000007924 injection Substances 0.000 description 10
- 239000004744 fabric Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 239000000446 fuel Substances 0.000 description 5
- 241000196324 Embryophyta Species 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 239000000571 coke Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 238000005272 metallurgy Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 206010010904 Convulsion Diseases 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000004320 controlled atmosphere Methods 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 206010013781 dry mouth Diseases 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Disintegrating Or Milling (AREA)
- Manufacture Of Iron (AREA)
Abstract
The utility model discloses a granular coal pulverizing system, including two sets of powder process systems, the powder process system includes flue gas entry, the broken machine of hammer, feeder, coal powder collecting device and draught fan, the flue gas entry of two sets of powder process systems passes through the dry gas pipe connection of pipeline and flue gas stove respectively, the flue gas entry of connecting two sets of powder process systems with set up an electric butterfly valve and the 2nd electric butterfly valve on the pipeline of the dry gas pipeline of flue gas stove respectively. The utility model discloses an add and establish one set of powder process system and close the stubble with original flue gas stove dry gas pipeline, realize that one set of flue gas stove supplies the production technology of two sets of powder process systems. The utility model discloses a two sets of broken machine entry dry gas trip valves of powder process system hammer add establishes its aperture of program control, can make it possess the function that the amount of wind was adjusted to the governing valve to the smelting cost of blast furnace has been reduced. The utility model discloses the relative device that contains two sets of flue gas furnace system has obviously reduced the input of fund to the biggest utilization in space has been realized.
Description
Technical field
This utility model belongs to metallurgy industry field, is specifically related to metallurgy industry coal injection device for blast furnace beans pulverized coal preparation system, particularly relates to be shared the system and method for a set of combustion gas furnace system powder process simultaneously by two set pulverized coal preparation systems.
Background technology
Pulverized coal injection in blast furnace is that in blast furnace ironmaking process, pulverized coal injection in blast furnace can play offer heat and reducing agent with substitute for coke, thus reduces coke ratio, reduces pig iron cost to the anchracite duff after directly winding-up is levigate in stove and/or bituminous coal powder from blast-furnace tuyere.Pulverized coal injection is the important technical revolution that modern blast furnace is smelted, and dividing by coal powder size has pulverized coal injection and granular coal injection two class Technology.
Granular coal injection system shown in Figure 1, this beans process system is pulverized coal injection, and its coal powder size prepared accounts for 100% less than 5mm, reaches 95% less than 2mm, only accounting for about 25% less than 0.074mm (i.e. 200 mesh), particle mean size is 0.55mm～0.65mm.Beans pulverized coal preparation system technological process is: the raw coal prepared passes through feeder belt 3 and enters hammer mill 2 from top, under the draft effect of main induced draft fan 12, the dry gas that combustion gas furnace 1 burning produces enters hammer mill and dries raw coal, and under hammering and dry common effect, raw coal is milled into coal dust；Dry gas is carried coal dust and is successively entered cyclone separator 4 and cloth bag collection machine 11 under main induced draft fan draft effect by hammer crushing motor spindle；The coal dust that cyclone separator and cloth bag collection machine are collected is through the first unloading valve 6 and the second unloading valve 9, helical feed 10 arrives the first coal dust and shakes sieve 7 and the second coal dust shakes sieve 8, the coal dust qualified by screening enters Pulverized Coal Bin, and the underproof material such as foreign material and bulky grain is outer row after entering powder-returning funnel；The chimney that the waste gas separated through cloth bag collection machine is exported by main induced draft fan enters air.
Along with improving constantly of blast furnace blowing beans level, the cyclone dust extractor of multitube ceramic cyclone structure easily blocks in addition, and powder process production capacity cannot meet blast furnace blowing demand.And once pulverized coal preparation system key equipment overhauls, then cannot meet blast fumance winding-up demand.
Utility model content
The problem that beans blows and sprays system can not be met for combustion gas furnace system a set of in prior art simultaneously, this utility model provides a kind of pulverized coal preparation system, this pulverized coal preparation system includes two set pulverized coal preparation systems, a set of combustion gas furnace production technology for two set pulverized coal preparation systems can be realized, thus realize promoting the purpose of beans powder process production capacity.
The combustion gas furnace system that this utility model provides includes two set pulverized coal preparation systems, the smoke inlet of described two set pulverized coal preparation systems is connected by the dry feed channel of pipeline and described combustion gas furnace respectively, described connection two is overlapped and is respectively provided with the first electric butterfly valve and the second electric butterfly valve on the pipeline of the smoke inlet of pulverized coal preparation system and the dry feed channel of described combustion gas furnace, and described pulverized coal preparation system includes hammer-crusher, feeder, coal powder collection device and air-introduced machine.
Preferably, described coal powder collection device includes cyclone separator and bag-type dust collection device according to flow of flue gas direction.
Preferably, described cyclone separator is single tube cyclone separator or multicyclone.
Preferably, open when described first electric butterfly valve and the second electric butterfly valve difference.So can realize the switching of two fuel pulverizing plant duties, and it is standby to realize a system one.
Preferably, described first electric butterfly valve and the second electric butterfly valve are opened simultaneously.The air quantity by follow-up fuel pulverizing plant can be regulated by the difference of aperture.So can realize the quick preparation of coal dust.
This utility model by add a set of pulverized coal preparation system and with former combustion gas furnace be dried feed channel carry out close stubble, it is achieved a set of combustion gas furnace for two set pulverized coal preparation systems production technologies.This utility model enters the dry mouth autogenous cutting valve that breaks by two set pulverized coal preparation system hammer-crushers and adds its aperture of programme-control, it can be made to possess the function of regulation valve regulation air quantity, and reduce the smelting cost of blast furnace.This utility model is relatively containing the device of two set combustion gas furnace systems, hence it is evident that decreases the input of fund, and achieves the maximum utilization in space.
Accompanying drawing explanation
Fig. 1, beans pulverized coal preparation system process principle figure.
Fig. 2, beans pulverized coal preparation system schematic diagram of the present utility model.
Accompanying drawing identifies:
1, combustion gas furnace；2, hammer mill；3, feeder belt；4, cyclone separator；5, butterfly valve the 6, first unloading valve；7, the first coal dust shakes sieve；8, the second coal dust shakes sieve；9, the second unloading valve；10, conveying worm；11, cloth bag collection machine；12, main induced draft fan；13, beans pulverized coal preparation system；14, coke-stove gas；15, blast furnace gas；16, combustion air；17, waste gas stop valve；18, high-temperature blower；19, exhaust gas by-pass valve；20, chimney；21, controlled atmosphere joint valve it is dried；22, the first electric butterfly valve；23, the second electric butterfly valve；24；First pulverized coal preparation system；25, the second pulverized coal preparation system.
Detailed description of the invention
The following is embodiment of the present utility model, it only illustrates rather than restriction with to of the present utility model.
This utility model device based on Fig. 1 carries out the preparation of coal dust.
Conventional granular coal injection system shown in Figure 1, the raw coal prepared passes through feeder belt 3 and enters hammer mill 2 from top, under the draft effect of main induced draft fan 12, the dry gas that combustion gas furnace 1 burning produces enters hammer mill and dries raw coal, and under hammering and dry common effect, raw coal is milled into coal dust；Dry gas is carried coal dust and is successively entered cyclone separator 4 and cloth bag collection machine 11 under main induced draft fan draft effect by hammer crushing motor spindle；The coal dust that cyclone separator 4 and cloth bag collection machine 11 are collected is through the first unloading valve 6 and the second unloading valve 9, helical feed 10 arrives the first coal dust and shakes sieve 7 and the second coal dust shakes sieve 8, the coal dust qualified by screening enters Pulverized Coal Bin, and the underproof material such as foreign material and bulky grain is outer row after entering powder-returning funnel；The chimney that the waste gas separated through cloth bag collection machine is exported by main induced draft fan enters air.
See Fig. 2, the combustion gas furnace system that this utility model provides includes two set pulverized coal preparation systems (first pulverized coal preparation system 24 and the second pulverized coal preparation system 25), the smoke inlet of described two set pulverized coal preparation systems is connected by the dry feed channel of pipeline and described combustion gas furnace respectively, described connection two is overlapped and is respectively provided with the first electric butterfly valve 22 and the second electric butterfly valve 23 on the pipeline of the smoke inlet of pulverized coal preparation system and the dry feed channel of described combustion gas furnace, and described pulverized coal preparation system includes hammer-crusher, feeder, coal powder collection device and air-introduced machine.Described coal powder collection device includes cyclone separator and bag-type dust collection device according to flow of flue gas direction.Described cyclone separator is single tube cyclone separator or multicyclone.First pulverized coal preparation system and the second pulverized coal preparation system are conventional design herein, it is even possible that substitute by the conventional such as system shown in Fig. 1 on the premise of meeting demand.
When first electric butterfly valve is opened, flue gas enters hammer-crusher through the first electric butterfly valve 22, and coal enters hammer-crusher through feeder, is dried gas under the convulsion draft effect of cloth bag case, carries coal dust respectively through cyclone and cloth bag case, be collected after coal dust.
When the first electric butterfly valve 22 and the second electric butterfly valve 23 are opened time different, two set pulverized coal preparation systems can realize the using and the reserved.Realizing the maintenance for other set device while a fuel pulverizing plant job, it can realize the most standby substantially, and the most on-demand switching falls to use.By the first electric butterfly valve 22 and the system of the second electric butterfly valve 23 selection start of hammer-crusher entrance, the electric butterfly valve that i.e. boot system is corresponding is opened, the electric butterfly valve closedown that back-up system is corresponding, and two set pulverized coal preparation systems can realize production of individually starting shooting.
When the blast furnace economy smelting amount of blowing and spraying is higher, there is following problem in above-mentioned pulverized coal preparation system, it is limited by the pulverized coal preparation system production capacity that production capacity is relatively low, when above-mentioned a certain coal-making system breaks down, the original breeze material position stored can constantly decline, if the coal-making system production capacity that now another enables is less, its meeting and cause production passive.Resume production accordingly even when processed equipment fault; breeze material position is the most on a declining curve within a certain period of time; now it is accomplished by reducing the shutdown inspection maintenance time of corresponding pulverized coal preparation system, otherwise exists for stopping the production accident of coal to blast furnace, thus substantially increase the smelting cost of blast furnace.
For above-mentioned problem, described first electric butterfly valve 22 of said apparatus and the second electric butterfly valve 23 can be opened simultaneously, it is achieved two fuel pulverizing plants work simultaneously.The aperture of two butterfly valves can pass through programme-control so that it is possesses the function of regulation valve regulation air quantity, thus realizes promoting the purpose of beans powder process production capacity.
Through long-term production test measuring and calculating; two set pulverized coal preparation systems share powder process production capacity that a set of combustion gas furnace produces simultaneously up to about 130t/h; the most not only meet blast furnace blowing demand; but also can selectively increase or extend the maintenance downtime of pulverized coal preparation system; according to the difference of different periods electricity price, the situation in identical yield can reduce electric cost.This beans powder process operational approach adds blast-furnace hot-air furnace exhaust consumption, decreases the consumption of blast furnace gas, the most just reduces the cost of powder process power consumption.And be difficult to walk due to raw coal material powder process, or equipment fault is in emergency circumstances, breeze material position rapid decrease then can be produced by two set pulverized coal preparation systems simultaneously and promote material position within a short period of time, guarantee the continuous-stable direct motion of pulverized coal injection, avoid blast furnace and stop the generation of coal accident, reduce therefore and want the fuel cost of full coke for smelting.
Claims (5)
1. a beans pulverized coal preparation system, including two set pulverized coal preparation systems, described pulverized coal preparation system includes smoke inlet, hammer-crusher, feeder, coal powder collection device and air-introduced machine, it is characterised in that:
The smoke inlet of described two set pulverized coal preparation systems is connected by the dry feed channel of pipeline and combustion gas furnace respectively, and described connection two is overlapped and is respectively provided with the first electric butterfly valve and the second electric butterfly valve on the pipeline of the smoke inlet of pulverized coal preparation system and the dry feed channel of described combustion gas furnace.
Beans pulverized coal preparation system the most according to claim 1, it is characterised in that described coal powder collection device includes cyclone separator and bag-type dust collection device according to flow of flue gas direction.
Beans pulverized coal preparation system the most according to claim 1 and 2, it is characterised in that described cyclone separator is single tube cyclone separator or multicyclone.
Beans pulverized coal preparation system the most according to claim 1 and 2, it is characterised in that open when described first electric butterfly valve and the second electric butterfly valve difference.
Beans pulverized coal preparation system the most according to claim 1 and 2, it is characterised in that described first electric butterfly valve of institute and the second electric butterfly valve are opened simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620040301.1U CN205603616U (en) | 2016-01-15 | 2016-01-15 | Granular coal pulverizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620040301.1U CN205603616U (en) | 2016-01-15 | 2016-01-15 | Granular coal pulverizing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205603616U true CN205603616U (en) | 2016-09-28 |
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ID=56960201
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620040301.1U Expired - Fee Related CN205603616U (en) | 2016-01-15 | 2016-01-15 | Granular coal pulverizing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205603616U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617715A (en) * | 2019-10-14 | 2019-12-27 | 云南德胜钢铁有限公司 | Hot blast stove high-temperature waste gas recycling method |
| CN115672529A (en) * | 2022-10-26 | 2023-02-03 | 山东钢铁股份有限公司 | Coal pulverization system and blast furnace smelting equipment |
-
2016
- 2016-01-15 CN CN201620040301.1U patent/CN205603616U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110617715A (en) * | 2019-10-14 | 2019-12-27 | 云南德胜钢铁有限公司 | Hot blast stove high-temperature waste gas recycling method |
| CN115672529A (en) * | 2022-10-26 | 2023-02-03 | 山东钢铁股份有限公司 | Coal pulverization system and blast furnace smelting equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160928 Termination date: 20180115 |