CN104451006A - Pea coal pulverizing system and pea coal pulverizing method - Google Patents
Pea coal pulverizing system and pea coal pulverizing method Download PDFInfo
- Publication number
- CN104451006A CN104451006A CN201410771619.2A CN201410771619A CN104451006A CN 104451006 A CN104451006 A CN 104451006A CN 201410771619 A CN201410771619 A CN 201410771619A CN 104451006 A CN104451006 A CN 104451006A
- Authority
- CN
- China
- Prior art keywords
- coal
- coal dust
- powder
- sieve
- collection bucket
- 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.)
- Granted
Links
Landscapes
- Combined Means For Separation Of Solids (AREA)
Abstract
The invention discloses a pea coal pulverizing system and a pea coal pulverizing method. The pea coal pulverizing system comprises a cyclone separator (4), wherein a first collecting hopper (16) and a second collecting hopper (17) are arranged at the bottom of the cyclone separator (4) in parallel, the first collecting hopper (16) is communicated with a first pulverized coal vibrating screen (10), a first pulverized coal collection adjusting valve (5) and a first dust unloading valve (7) are sequentially arranged on a communicating pipeline of the first collecting hopper (16) and the first pulverized coal vibrating screen (10), the second collecting hopper (17) is connected with a first pulverized coal conveying machine (9), a second pulverized coal collection adjusting valve (6) and a second dust unloading valve (8) are sequentially arranged on a communicating pipeline of the second collecting hopper (17) and the first pulverized coal conveying machine (9), and the first pulverized coal conveying machine (9) is connected with a second pulverized coal vibrating screen (11). The pea coal pulverizing system and the pea coal pulverizing method can solve the technical problems that the blast furnace coal injection pulverizing system has low productivity.
Description
Technical field
The invention belongs to the technical field of blast furnace in metallurgical industry iron-making coal-injecting, particularly, the present invention relates to a kind of beans pulverized coal preparation system and milling method.
Background technology
Pulverized coal injection in blast furnace is from blast-furnace tuyere directly winding-up pulverized anthracite or bituminous coal powder or the mixture of the two in stove, plays the effect providing heat and reductive agent, thus reduces coke ratio, reduce pig iron cost in blast furnace ironmaking process with substitute for coke.Therefore, pulverized coal injection is the important technical revolution that modern blast furnace is smelted.Pulverized coal injection carries out division by coal powder size pulverized coal injection and granular coal injection.Pulverized coal injection develops comparatively early, and comparative maturity; Granular coal injection is but just obtain developing application rapidly in recent years on the part blast furnace of the states such as English, method, Sweden.
But at home and even region, Asia, up to the present only have Laigang to use granular coal injection technology.In this beans process system, powder ratio is received in the design of cyclonic separator and cloth bag collection machine is 70%/30%.But the coal dust collected cyclonic separator and cloth bag collection machine in actual production carries out the contrast of calculation material, finds that its actual receipts powder ratio is 88%/12%.In addition, the powder delivery mode that in this system, hammer mill " goes out under above entering ", determine it and do not possess the ability processing separating sundries compared with medium-speed pulverizer (the coal-grinding equipment of fine coal pulverized coal preparation system), so enter all foreign material in pulverized coal preparation system raw coal all will carry out screening process by the coal dust sieve that shakes.Thus, the sieve grating that shakes will adhere to foreign material such as being wound around fiber, and sieving capacity will be affected, and in actual production, the maximum powder process amount of this cover beans pulverized coal preparation system is only about 75t/h.
Along with blast furnace improving constantly coal injection specification of quality, just need to reduce the foreign material in coal dust and macrobead further, and by practice reduce coal dust shake sieve sieve at the bottom of gap be effective method, following coal dust output will correspondingly reduce, thus cannot meet blast furnace blowing demand.Therefore, can promote beans system powder process production capacity have just become this cover technique sustainable development and a key link constantly promoting.
When existing beans pulverized coal preparation system is normally produced the first coal dust shake sieve treatment capacity be 75t/h × 88%=66t/h, the second coal dust shake sieve treatment capacity be 75t/h × 12%=9t/h.Two conclusions can be drawn: one be the coal dust actual maximum throughput of sieve that shakes is about 66t/h by the shake contrast of sieve actual treatment amount of first, second coal dust; Two be the second coal dust shake sieve ability seriously leave unused.By above two conclusions known as improve the second coal dust shake sieve treatment capacity, the maximum powder process output of corresponding beans system also can get a promotion.Therefore, the bottleneck that the serious unbalance that cyclonic separator and cloth bag collection machine receive powder ratio has just become restriction beans powder process production capacity to promote.
Relevant improvement for this bottleneck has following two kinds, one is strengthen blower fan draft, improve the flow velocity of primary mixture in cyclonic separator, thus increase the coal dust entering cloth bag case, realize the optimization of receiving powder ratio, its shortcoming is remarkable: strengthening blower fan draft needs blower fan, motor retrofit cost of investment higher, accelerates flow velocity and the coal dust entering cloth bag collector in addition, also can increase the wearing and tearing of system, especially particularly serious to the wearing and tearing of cloth bag; Two is add back-blowing in whirlwind inside, or add the entrance of a roadside siphunculus to cloth bag collection machine in whirlwind outlet, its object is all increase the coal dust amount entering cloth bag collection machine, therefore still there is the defect accelerating cloth bag wearing and tearing, the back-blowing increased then likely causes system airflow disorderly, thus affect the parameter such as blast, air quantity, unpredictable disadvantageous effect is caused to whole flouring technology system.
Summary of the invention
The object of the invention is to, provide a kind of beans pulverized coal preparation system, this system solves the low technical problem of pulverized coal injection beans pulverized coal preparation system production capacity.
The present invention is achieved through the following technical solutions above-mentioned purpose:
A kind of beans pulverized coal preparation system, described system comprises cyclonic separator 4, is set up in parallel the first collection bucket 16 and the second collection bucket 17 bottom described cyclonic separator 4; Described first collection bucket 16 and the first coal dust sieve 10 that shakes is connected, and the connecting pipe of the two sets gradually in order the first receipts powder variable valve 5 and the first unloading valve 7; Described second collection bucket 17 is connected with the first coal powder conveyer 9, and the two pipeline be connected sets gradually the second receipts powder variable valve 6 and the second unloading valve 8 in order; Described first coal powder conveyer 9 and the second coal dust sieve 11 that shakes is connected.
The top of described cyclonic separator 4 is connected with cloth bag collection machine 14, and described cloth bag collection machine 14 is connected by the second coal powder conveyer 13 and the second coal dust sieve 11 that shakes; Described cloth bag collection machine 14 is also connected with induced draft fan 15; Described cyclonic separator 4 is connected with crusher 2.
Preferably, described first collection bucket 16 and the second collection bucket 17 are conical collection bucket.
Preferably, described first receipts powder variable valve 5 and the second receipts powder variable valve 6 are butterfly valve.
Preferably, described first coal powder conveyer 9 and the second coal powder conveyer 13 are worm conveyor.
Preferably, described crusher 2 is hammer mill.
Another object of the present invention is, provides a kind of beans milling method based on above-mentioned beans pulverized coal preparation system, said method comprising the steps of:
1) fragmentation of raw coal drying obtains coal dust, and the primary mixture that dry gas carries coal dust formation enters cyclonic separator 4 under draft effect;
2) in cyclonic separator 4, primary mixture is separated, large proportion coal dust enters the first collection bucket 16 and the second collection bucket 17, regulate the aperture of the first receipts powder variable valve 5 and the second receipts powder variable valve 6, balance shake sieve 10 and the second coal dust of the first coal dust to shake the receipts powder ratio of sieve 11, coal dust collected by first collection bucket 16 is received powder variable valve 5 and the first unloading valve 7 by first and is entered the first coal dust and to shake sieve 10, coal dust collected by second collection bucket 17 receives powder variable valve 6 and the second unloading valve 8 by second, and enters the second coal dust through the first coal powder conveyer 9 and to shake sieve 11;
3) the first coal dust sieve 10 and the second coal dust sieve 11 that shakes that shakes sieves qualified coal dust and enters Pulverized Coal Bin.
Step 2) in cyclonic separator be separated after residual gas powder mixture enter cloth bag collection machine 14, the coal dust of collection enters the second coal dust by the second coal powder conveyer 13 and to shake sieve 11, and the isolated waste gas of cloth bag collection machine 14 enters air by induced draft fan 15.
The present invention shunts the coal dust that tornado dust collector are collected, and shake sieve and the second coal dust of Optimization Balancing first coal dust shakes the receipts powder ratio of sieve, thus the maximum powder process production capacity of raising beans pulverized coal preparation system.
Single chamber collection bucket conical bottom cyclonic separator is changed into two rooms collection bucket by the present invention, and supportingly bottom the collection bucket of two rooms, add variable valve and unloading valve respectively, and coal dust pipeline, worm conveyor etc. that two rooms collection bucket is collected are introduced respectively the first and second coal dusts sieve that shakes and carry out screening and process.After adopting such scheme, the invention has the advantages that:
1) by the transformation to single equipment local structure in pulverized coal preparation system, thus realize global optimization balance flouring technology being received to powder ratio, reach the object promoting beans powder process production capacity.
2) confirm through test, to the change of cyclonic separator bottom collection bucket structure, cyclonic separator internal gas flow can not be affected, and then cause the disorder of powder process built-in system.
3) by controlling the aperture of receipts powder variable valve that adjustment collection bucket bottom adds, can realize receiving powder ratio from main regulation.
4) when any one group of fault of two groups of unloading valves of collection bucket bottom, two room; can in the non-stop-machine situation of pulverized coal preparation system, the butterfly valve on closing fault unloading valve top, then suitably turns powder process amount down; can on-bne repair being realized, avoiding equipment failure to shut down producing the impact caused.
Accompanying drawing explanation
Fig. 1 is the structural representation of beans pulverized coal preparation system of the present invention;
Reference numeral: 1, combustion gas furnace; 2, crusher; 3, feeder belt; 4, cyclonic separator; 5, first powder variable valve is received; 6, second powder variable valve is received; 7, the first unloading valve; 8, the second unloading valve; 9, the first coal powder conveyer; 10, the first coal dust shakes sieve; 11, the second coal dust shakes sieve; 12, the 3rd unloading valve; 13, the second coal powder conveyer; 14, cloth bag collection machine; 15, induced draft fan; 16, the first collection bucket; 17, the second collection bucket.
Embodiment
With the drawings and specific embodiments, the present invention is further detailed explanation below.
Embodiment 1
As shown in Figure 1, a kind of beans pulverized coal preparation system, described system comprises cyclonic separator 4, and the top of described cyclonic separator 4 is connected with cloth bag collection machine 14, and described cloth bag collection machine 14 is connected by the second coal powder conveyer 13 and the second coal dust sieve 11 that shakes; Described cloth bag collection machine 14 is also connected with induced draft fan 15; Described cyclonic separator 4 is connected with crusher 2; The first collection bucket 16 and the second collection bucket 17 is set up in parallel bottom described cyclonic separator 4; Described first collection bucket 16 and the first coal dust sieve 10 that shakes is connected, and the connecting pipe of the two sets gradually in order the first receipts powder variable valve 5 and the first unloading valve 7; Described second collection bucket 17 is connected with the first coal powder conveyer 9, and the two pipeline be connected sets gradually the second receipts powder variable valve 6 and the second unloading valve 8 in order; Described first coal powder conveyer 9 and the second coal dust sieve 11 that shakes is connected.
Described first collection bucket 16 and the second collection bucket 17 are conical collection bucket.Described first receipts powder variable valve 5 and the second receipts powder variable valve 6 are butterfly valve.Described first coal powder conveyer 9 and the second coal powder conveyer 13 are worm conveyor.Described crusher 2 is hammer mill.
Based on a beans milling method for above-mentioned beans pulverized coal preparation system, said method comprising the steps of:
1) raw coal enters crusher 2 through feeder belt 3 from top, under the draft effect of induced draft fan 15, the dry gas that combustion gas furnace 1 burning produces enters crusher 2 pairs of raw coal dries, under hammering and dry acting in conjunction, raw coal is ground into coal dust, and the primary mixture that dry gas carries coal dust formation enters cyclonic separator 4 under draft effect;
2) in cyclonic separator 4, primary mixture is separated, large proportion coal dust enters the first collection bucket 16 and the second collection bucket 17, regulate the aperture of the first receipts powder variable valve 5 and the second receipts powder variable valve 6, balance shake sieve 10 and the second coal dust of the first coal dust to shake the receipts powder ratio of sieve 11, coal dust collected by first collection bucket 16 is received powder variable valve 5 and the first unloading valve 7 by first and is entered the first coal dust and to shake sieve 10, coal dust collected by second collection bucket 17 receives powder variable valve 6 and the second unloading valve 8 by second, and enters the second coal dust through the first coal powder conveyer 9 and to shake sieve 11;
3) the first coal dust sieve 10 and the second coal dust sieve 11 that shakes that shakes sieves qualified coal dust and enters Pulverized Coal Bin.
Step 2) in cyclonic separator 4 be separated after residual gas powder mixture enter cloth bag collection machine 14, the coal dust collected enters the second coal dust by the second coal powder conveyer 13 and the 3rd unloading valve 12 and to shake sieve 11, and the isolated waste gas of cloth bag collection machine 14 enters air by induced draft fan 15.
Adopt above-mentioned beans pulverized coal preparation system, in beans p owder production process, first keep receiving powder variable valve 5,6 and be in full-gear, adjustment feeder belt 3 frequency (50Hz) reaches 100t/h to coal-supplying amount, observe coal dust shake sieve 10,11 screening and return powder situation, the aperture of powder variable valve 5,6 is received in adjustment if needed, to shake the receipts powder ratio of sieve 10,11 to balance coal dust, avoid back the generation of powder (i.e. screen overflow abnormal increase) phenomenon, thus improve beans powder process production capacity.Test result shows, and coal-supplying amount can be added to maximum value 100t/h, and maximum powder process amount (receiving powder amount) can reach 85t/h ~ 90t/h, can meet 2 × 1880m completely
3the coal powder injection demand of blast furnace about 60t/h.On this basis, by shaking to coal dust, sieve sieve gap, the end reduces optimization further, thus reduces the foreign material in coal dust, and improve quality of pc, meanwhile coal dust production capacity still can meet winding-up demand, just creates favourable condition for the coal powder injection of blast furnace continous-stable like this.
Comparative example 1
Under substantially same equipment and process condition, beans pulverized coal preparation system is implemented on cyclonic separator body, draw shunt conduit directly on the worm conveyor of sack cleaner bottom, or add the technological transformation of a roadside siphunculus to the entrance of cloth bag collection machine at Cyclone outlet, first method causes pulverized coal preparation system internal gas flow disorderly, and its order of second method is to increase the coal dust amount entering cloth bag collection machine, therefore there is the defect accelerating cloth bag wearing and tearing.And it is all more not remarkable than the effect of row that these methods receive powder to balance cyclonic separator and cloth bag collection machine, do not arrive the object promoting beans powder process production capacity.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted.Although with reference to embodiment to invention has been detailed description, will be understood by those skilled in the art that, modify to technical scheme of the present invention or equivalent replacement, do not depart from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (8)
1. a beans pulverized coal preparation system, described system comprises cyclonic separator (4), it is characterized in that, described cyclonic separator (4) bottom is set up in parallel the first collection bucket (16) and the second collection bucket (17); Described first collection bucket (16) and the first coal dust shake and sieve (10) and be connected, and the connecting pipe of the two set gradually in order the first receipts powder variable valve (5) and the first unloading valve (7); Described second collection bucket (17) is connected with the first coal powder conveyer (9), and the two pipeline be connected sets gradually the second receipts powder variable valve (6) and the second unloading valve (8) in order; Described first coal powder conveyer (9) and the second coal dust shake and sieve (11) and be connected.
2. beans pulverized coal preparation system according to claim 1, it is characterized in that, the top of described cyclonic separator (4) is connected with cloth bag collection machine (14), and described cloth bag collection machine (14) is shaken by the second coal powder conveyer (13) and the second coal dust and sieves (11) and be connected; Described cloth bag collection machine (14) is also connected with induced draft fan (15); Described cyclonic separator (4) is connected with crusher (2).
3. beans pulverized coal preparation system according to claim 1 and 2, is characterized in that, described first collection bucket (16) and the second collection bucket (17) are conical collection bucket.
4. beans pulverized coal preparation system according to claim 1 and 2, is characterized in that, described first receipts powder variable valve (5) and second are received powder variable valve (6) and are butterfly valve.
5. beans pulverized coal preparation system according to claim 1 and 2, is characterized in that, described first coal powder conveyer (9) and the second coal powder conveyer (13) are worm conveyor.
6. beans pulverized coal preparation system according to claim 1 and 2, is characterized in that, described crusher (2) is hammer mill.
7., based on the beans milling method of beans pulverized coal preparation system described in claim 1 or 2, said method comprising the steps of:
1) fragmentation of raw coal drying obtains coal dust, and the primary mixture that dry gas carries coal dust formation enters cyclonic separator (4) under draft effect;
2) in cyclonic separator (4), primary mixture is separated, large proportion coal dust enters the first collection bucket (16) and the second collection bucket (17), the first receipts powder variable valve (5) and second are regulated to receive the aperture of powder variable valve (6), balance shake sieve (10) and the second coal dust of the first coal dust to shake the receipts powder ratio of sieve (11), coal dust collected by first collection bucket (16) is received powder variable valve (5) and the first unloading valve (7) by first and is entered the first coal dust and to shake sieve (10), coal dust collected by second collection bucket (17) receives powder variable valve (6) and the second unloading valve (8) by second, and enter the second coal dust through the first coal powder conveyer (9) and to shake sieve (11),
3) the first coal dust sieve (10) and the second coal dust sieve (11) that shakes that shakes sieves qualified coal dust and enters Pulverized Coal Bin.
8. beans milling method according to claim 7, it is characterized in that, step 2) in cyclonic separator (4) be separated after residual gas powder mixture enter cloth bag collection machine (14), the coal dust collected enters the second coal dust by the second coal powder conveyer (13) and to shake sieve (11), and cloth bag collection machine (14) isolated waste gas passes through induced draft fan (15) and enters air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410771619.2A CN104451006B (en) | 2014-12-11 | 2014-12-11 | A kind of beans pulverized coal preparation system and milling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410771619.2A CN104451006B (en) | 2014-12-11 | 2014-12-11 | A kind of beans pulverized coal preparation system and milling method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104451006A true CN104451006A (en) | 2015-03-25 |
| CN104451006B CN104451006B (en) | 2016-12-07 |
Family
ID=52897751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410771619.2A Expired - Fee Related CN104451006B (en) | 2014-12-11 | 2014-12-11 | A kind of beans pulverized coal preparation system and milling method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104451006B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106269196A (en) * | 2016-08-20 | 2017-01-04 | 泰州市启航石油分析仪器有限公司 | Convenient regulating type pulverized coal grinding machine air pressure automatic sieving unit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1088263A (en) * | 1992-12-18 | 1994-06-22 | 马鞍山钢铁公司 | The broken granulation coal of hammering and rolling Processes and apparatus |
| CN1796324A (en) * | 2004-12-29 | 2006-07-05 | 清华大学 | Method for preparing slaked lime in mode of circulating fluid bed and equipment |
| CN102128449A (en) * | 2011-04-20 | 2011-07-20 | 重庆大学 | Double spouted bed slag cooler and air return system matched with same |
| CN203771433U (en) * | 2014-04-04 | 2014-08-13 | 彭维明 | Smoke efficient dust removal system for coal-fired power plant |
| CN204325392U (en) * | 2014-12-11 | 2015-05-13 | 山东钢铁股份有限公司 | A kind of beans pulverized coal preparation system |
-
2014
- 2014-12-11 CN CN201410771619.2A patent/CN104451006B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1088263A (en) * | 1992-12-18 | 1994-06-22 | 马鞍山钢铁公司 | The broken granulation coal of hammering and rolling Processes and apparatus |
| CN1796324A (en) * | 2004-12-29 | 2006-07-05 | 清华大学 | Method for preparing slaked lime in mode of circulating fluid bed and equipment |
| CN102128449A (en) * | 2011-04-20 | 2011-07-20 | 重庆大学 | Double spouted bed slag cooler and air return system matched with same |
| CN203771433U (en) * | 2014-04-04 | 2014-08-13 | 彭维明 | Smoke efficient dust removal system for coal-fired power plant |
| CN204325392U (en) * | 2014-12-11 | 2015-05-13 | 山东钢铁股份有限公司 | A kind of beans pulverized coal preparation system |
Non-Patent Citations (1)
| Title |
|---|
| 孙爱霞: "粒煤喷吹技术在1880m3高炉的应用", 《科技信息》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106269196A (en) * | 2016-08-20 | 2017-01-04 | 泰州市启航石油分析仪器有限公司 | Convenient regulating type pulverized coal grinding machine air pressure automatic sieving unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104451006B (en) | 2016-12-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104556762B (en) | Tower-type machine-made sand preparation and grading adjustment system | |
| CN103949322B (en) | A kind of nickel slag grinding system and its production technology | |
| CN206746767U (en) | A kind of desulfurization agstone preparation system | |
| CN107321618A (en) | A kind of primary processing unit (plant) of rice cereal crops | |
| CN204325392U (en) | A kind of beans pulverized coal preparation system | |
| CN203874873U (en) | Nickel slag grinding system | |
| CN106269169B (en) | A kind of agstone preparation method | |
| CN210115135U (en) | Sectional type steel slag powder making equipment | |
| US6644479B1 (en) | Method and air separator for classifying charging material reduced in size | |
| CN110468274A (en) | Electric furnace ash prepares cold-consolidated ball Processes and apparatus | |
| CN104451006A (en) | Pea coal pulverizing system and pea coal pulverizing method | |
| CN104858033B (en) | A kind of grinding method | |
| CN104876463A (en) | Dry machine-made sand production system | |
| CN205192163U (en) | Powdered ore drying and debris piece -rate system | |
| CN209597301U (en) | A kind of crushing plant feed hopper | |
| CN110216004A (en) | A kind of slag dustless environment protecting analysis sand fuel pulverizing plant processed | |
| CN211012464U (en) | Combustion size classification device for iron-making sintering | |
| CN105478353B (en) | A kind of sieve bottom of Bar strip type coal dust vibration sieve | |
| CN205463174U (en) | Rod formula buggy shakes at bottom of sieve that sieves | |
| CN207418780U (en) | It is a kind of that there is the pulverized coal preparation system of external feeding and system of blast furnace injection | |
| CN206304792U (en) | A kind of energy saving and environment friendly Rice processor | |
| RU2486969C2 (en) | Method of dry concentration of quartz sand | |
| CN104327870A (en) | Coking coal production method and coking coal | |
| CN205603616U (en) | Granular coal pulverizing system | |
| CN104399667A (en) | Stainless steel slag sorting device and stainless steel slag sorting method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20161207 Termination date: 20211211 |