CN207313630U - A kind of Coal Grinding System of Pci humidification device - Google Patents
A kind of Coal Grinding System of Pci humidification device Download PDFInfo
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- CN207313630U CN207313630U CN201721333032.9U CN201721333032U CN207313630U CN 207313630 U CN207313630 U CN 207313630U CN 201721333032 U CN201721333032 U CN 201721333032U CN 207313630 U CN207313630 U CN 207313630U
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- grinding system
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Abstract
The utility model belongs to field of metallurgy, and in particular to a kind of Coal Grinding System of Pci humidification device.By setting humidification device, atomized water is blown in the drying gas to coal pulverizer to be entered, to dry gas cooling, achievees the purpose that to reduce oxygen components concentration in dry gas.The utility model can effectively solve the problems, such as to shut down influence production because dry gas oxygen content is exceeded in existing flue gas self-circulation type pulverized coal preparation system technique; be conducive to steady production, eliminate safe hidden trouble; not only there is significantly economic benefit and safe and reliable; but also with technique is simple, technology maturation is reliable, easy to realize, and the characteristics of investment cost is low.
Description
Technical field
The utility model belongs to field of metallurgy, and in particular to a kind of Coal Grinding System of Pci humidification device.
Background technology
Pulverized coal injection is blast furnace iron-making process briquet replacing coke, the important power-saving technology for changing blast furnace fuel structure, is being alleviated
Coking coal resource is short, reduce pig iron cost and mitigates environmental pollution plays an important role, and has significantly economic, environmentally friendly and society
Benefit.
Coal Grinding System of Pci is the key link of furnace coal spraying technology, and mainly there is smoke directly ventilating formula powder in the country at present
Two kinds of techniques of system and flue gas self-circulation type pulverized coal preparation system.Smoke directly ventilating formula pulverized coal preparation system is that Current Blast Furnace Pulverized Coal pulverized coal preparation system is adopted
Prevailing technology, but since flue gas self-circulation type pulverized coal preparation system technique can be solved effectively because pulverized coal injection workshop is away from blast furnace
Hot blast stove system causes high exhaust piping investment, exhaust gas of hot-blast stove amount deficiency or is limited by iron-smelter place and can not use cigarette
The problem of gas straight-line pulverized coal preparation system, so steel plant are progressively widely applied at home at present.
Flue gas self-circulation type pulverized coal preparation system is a kind of high-temperature flue gas generated by combustion gas furnace burning blast furnace gas with following certainly
Ring flue gas mixing generation temperature is between 200 DEG C~300 DEG C, the drying gas of oxygen content≤8% dries coal pulverizer grinding powder coal
Technique.Wherein, the high-temperature flue gas of combustion gas furnace burning blast furnace gas generation, its main component is CO2And N2, temperature for 900 DEG C~
1100 DEG C, there is high temperature, low oxygen content (≤2%), be good high temperature, inertia heat gas, accounted in dry gas
Than for 30%~45%；Self-loopa flue gas is that inertia drying gas completes gas powder point through the equipment such as bag filter and main smoke discharging blower fan
Tail gas from after, its main component is water vapour, CO2And N2, temperature is 85 DEG C or so, has low temperature, compared with low oxygen content (10%
~12%) the features such as, be the good temperature regulating medium of high-temperature flue gas, and accounting is 55%~70% in dry gas.The technique
One of key index be system. Inert drying gas oxygen content, which becomes the limit that can this technique normally keep the safety in production
Sexual factor processed.According to national standard《Pulverized coal injection in blast furnace engineering design code》(GB50607-2010) provision regulation is forced：
The highest of inertia drying gas allows oxygen content≤12% under system condition, and the purpose of the provision is in order to avoid in pulverized coal preparation system
Coal dust ensures system operation safety, prevents the generation of the accidents such as casualties because of the possibility that oxygen content is exceeded and explodes.
But since flue gas self-circulation type pulverized coal preparation system process cycles use part system tail gas (self-loopa flue gas) conduct
Coal pulverizer inertia dries the source of the gas of gas, and dries the oxygen components concentration in gas and be progressively enriched with because recycling, therefore is also easy to produce dry
Pathogenic dryness has the problem of higher oxygen content.At the same time, since coal pulverizer, feeder and cloth bag collection machine of pulverized coal preparation system etc. are set
It is unavoidable there are different degrees of air leakage phenomena (air leak rate of air curtain ＞ 8%) at standby and pipeline coupling flange, further add
The problem of acute dry gas oxygen content rise, therefore the problem of often occur dry gas oxygen content exceeded in production and shut down,
Normally produced so as to influence enterprise.Therefore, the inertia drying gas oxygen content of flue gas self-circulation type pulverized coal preparation system is reduced, for ensureing
It is most important that enterprise normally keeps the safety in production and reduce its economic loss, but at present the technical solution in relation to this problem in industry
Inside but it is rarely reported.
The content of the invention
In view of this, the purpose of this utility model is to provide a kind of Coal Grinding System of Pci humidification device, to solve
Existing flue gas self-circulation type pulverized coal preparation system technique inertia dries the problem of gas oxygen content is exceeded.
To reach above-mentioned purpose, the utility model provides following technical solution：A kind of Coal Grinding System of Pci humidification dress
Put, including by the sequentially connected water supply installation of pipeline, atomising device and pressurizer, the pressurizer is by humidifying pipeline and company
The drying feed channel being connected between combustion gas furnace exhanst gas outlet and coal pulverizer smoke inlet is connected.
Further, the flow sensor being successively set between water supply installation and atomising device and flow-rate adjustment are further included
Valve.
Further, the humidification device has multichannel, is connected in parallel on successively in dry feed channel.
The beneficial effects of the utility model are：
1) can effectively solve to shut down because dry gas oxygen content is exceeded in existing flue gas self-circulation type pulverized coal preparation system technique
The problem of influencing production, be conducive to steady production, there is significantly economic benefit；
2) real-time monitoring can be achieved, so that system. Inert drying gas oxygen content is strict controlled in national Specification value
Within 12%, the security of system operation has effectively been ensured, eliminated security risk, thus had the advantages that safe and reliable；
3) flue gas self-circulation type pulverized coal preparation system uses humidification process, and technique is simple, technology maturation is reliable, easy to realize；
4) humidification device composition is simple, existing equipment can be improved, investment cost is low.
Brief description of the drawings
In order to make the purpose of this utility model, technical solution and beneficial effect clearer, the utility model provides as follows
Attached drawing illustrates：
Fig. 1 is the system schematic of the utility model.
Embodiment
Below in conjunction with attached drawing, the preferred embodiment of the utility model is described in detail.
Received as shown in the figure, Coal Grinding System of Pci includes run coal bin 11, feeder 10, combustion gas furnace 1, coal pulverizer 9, cloth bag
Powder device 12 and main smoke discharging blower fan 13.There is humidification device in Coal Grinding System of Pci in the present embodiment, including pass through pipeline
Sequentially connected water supply installation 3, atomising device 6 and pressurizer 7, the pressurizer 7 is by humidifying pipeline 8 and being connected to combustion gas furnace
Drying feed channel 2 between 9 smoke inlet of 1 exhanst gas outlet and coal pulverizer is connected.Atomising device 6 can be by the liquid in water supply installation 3
State industry water generates atomized water, and pressurizer 7 is introduced into after then atomized water is pressurizeed in dry feed channel 2.
The flow sensor 4 and flow being successively set between water supply installation 3 and atomising device 6 are further included in the present embodiment
Regulating valve 5.Flow sensor 4 and flow control valve 5 are used for realization flow serials control circuit feedback, can monitor and adjust in real time
Flow, achievees the purpose that to control atomized water straying quatity.
Further as such scheme is improved, and the humidification device has multichannel, is connected in parallel on successively in dry feed channel 2.
Spare cooling circuit is can be used as, and can at the same time open and realize control accurate.
Detailed process is：By the liquid-state industrial water in water supply installation 3 after atomising device 6 generates atomized water, pass through pipeline
Lead in pressurizer 7, be forced into the required pressure of technique, atomized water is then introduced into dry feed channel 2 by humidifying pipeline 8
It is interior, humidification amount is adjusted using flow control valve 5 and flow sensor 4, to obtain the low oxygen content for meeting technological requirement
Dry gas.Qualified drying gas is introduced into coal pulverizer 9, coal pulverizer 9 by means of the draft of the main smoke discharging blower fan 13 in pulverized coal preparation system
Mill to the raw coal for coming from run coal bin 11 and feeder 10, dry gas is dried and conveys to the coal dust for qualification of milling, matter
Measure qualified coal dust to be sent into cloth bag collection machine 12 through conveyance conduit, separated by cloth bag collection machine 12 into promoting the circulation of qi-powder, coal dust
Into injection system, dry gas enters back into combustion gas furnace 1 and circulates profit through main smoke discharging blower fan 13 to high altitude discharge, which part tail gas
With.
The humidification process of Coal Grinding System of Pci, the drying between 9 smoke inlet of 1 exhanst gas outlet of combustion gas furnace and coal pulverizer
Humidification device all the way is at least connected in feed channel 2, control humidification device is blown the injection amount of atomized water into dry feed channel 2,
Increase and adjust the exhaust gas volumn that blast furnace gas combustion generates in combustion gas furnace 1, reduce and adjust self-loopa exhaust gas volumn.
Generated specifically, atomized water is atomized for liquid-state industrial water through atomising device 6, generate and technique is forced into by pressurizer 7
Required pressure, after by humidify pipeline 8 spray into drier pipeline in.Atomizing particle size is controlled between 1 μm~5 μm.Liquid-state industrial water
Water quality requirement suspension content≤50mg/L, pH value are 6.5~9, carbonate hardness≤140mg/L.
The technique is reduced in dry gas by the way that the particulate atomized water that particle size is 1 μm~5 μm is passed through in dry gas
Self-loopa flue gas dosage, it is achieved thereby that reducing the purpose of oxygen components concentration in dry gas.Concrete reason is：On the one hand,
, can be rapidly by dry gas since atomized water has the characteristics that individual particle is small, surface area vaporizes greatly, easily, it is fast to absorb heat
Heat is taken away, so that dry temperature degree is reduced, therefore to make up dry gas because the temperature difference, combustion gas furnace caused by atomized water vaporization need
More burning blast-furnace gas improve the supply of high-temperature flue gas amount, while reduce self-loopa exhaust gas volumn, to maintain dry temperature degree, make it full
Sufficient technological requirement；On the other hand, water vapour in dry gas is improved because vaporization of absorbing heat is changed into gaseous state from liquid due to atomized water
Volume ratio, while reduce self-loopa flue gas dosage in dry gas, thus correspondingly dilute oxygen components in dry gas
Concentration, reduces the volume ratio of oxygen components in dry gas, it is achieved thereby that reducing the purpose of dry gas oxygen content.
Finally illustrate, preferred embodiment above is merely intended for describing the technical solutions of the present application, but not for limiting the present application, to the greatest extent
Pipe has been described in detail the utility model by above preferred embodiment, but those skilled in the art should manage
Solution, in the form and details can make it various changes, without departing from the utility model claims book institute
The scope of restriction.
Claims (3)
- A kind of 1. Coal Grinding System of Pci humidification device, it is characterised in that：Including by the sequentially connected water supply installation of pipeline, Atomising device and pressurizer, the pressurizer is by humidifying pipeline and being connected to combustion gas furnace exhanst gas outlet and coal pulverizer smoke inlet Between drying feed channel be connected.
- 2. Coal Grinding System of Pci humidification device according to claim 1, it is characterised in that：Further include and be successively set on Flow sensor and flow control valve between water supply installation and atomising device.
- 3. Coal Grinding System of Pci humidification device according to claim 2, it is characterised in that：The humidification device has more Road, is connected in parallel in dry feed channel successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721333032.9U CN207313630U (en) | 2017-10-17 | 2017-10-17 | A kind of Coal Grinding System of Pci humidification device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721333032.9U CN207313630U (en) | 2017-10-17 | 2017-10-17 | A kind of Coal Grinding System of Pci humidification device |
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| CN207313630U true CN207313630U (en) | 2018-05-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107488770A (en) * | 2017-10-17 | 2017-12-19 | 中冶赛迪工程技术股份有限公司 | A kind of Coal Grinding System of Pci humidification process and device |
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2017
- 2017-10-17 CN CN201721333032.9U patent/CN207313630U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107488770A (en) * | 2017-10-17 | 2017-12-19 | 中冶赛迪工程技术股份有限公司 | A kind of Coal Grinding System of Pci humidification process and device |
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