CN205382183U - Buggy jetting pressure release returns whitewashed system - Google Patents

Buggy jetting pressure release returns whitewashed system Download PDF

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Publication number
CN205382183U
CN205382183U CN201620206979.2U CN201620206979U CN205382183U CN 205382183 U CN205382183 U CN 205382183U CN 201620206979 U CN201620206979 U CN 201620206979U CN 205382183 U CN205382183 U CN 205382183U
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CN
China
Prior art keywords
pipeline
coal
valve
winding
pressure release
Prior art date
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CN201620206979.2U
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Chinese (zh)
Inventor
孙刘恒
陈林森
俞金城
肖红涛
杨继敏
周飞
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中冶华天南京工程技术有限公司
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Priority to CN201620206979.2U priority Critical patent/CN205382183U/en
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Publication of CN205382183U publication Critical patent/CN205382183U/en

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Abstract

The utility model discloses a buggy jetting pressure release returns whitewashed system invents for solving the many scheduling problems of prior art trouble. Include and carry out the raw coal fine grinding and dry mill, the coal dust collector that is connected through pipeline and mill, the buggy storehouse of being connected through pipeline and coal dust collector, pass through the jetting jar that pipeline and coal dust collector are connected that coal dust collector passes through the pipeline and communicates the main air blower, communicate and be equipped with the third diverter valve on the pipeline of coal dust collector and main air blower. The utility model discloses reducible jetting system pressure release and return whitewashed in -process high -pressure gas and to buggy storehouse and coal dust collector's impact, improved blast furnace buggy jetting system reliability of operation.

Description

Breeze blowing pressure release back powder system

Technical field

This utility model belongs to all kinds of powder spray blowing technology field, is specifically related to a kind of breeze blowing pressure release back powder system.

Background technology

Pulverized Coal Injection System with Fuzzy all adopts gases at high pressure (nitrogen or air) to carry out pressurising, fluidisation and conveying, each winding-up cycle generally be made up of " dress powder pressurising winding-up pressure release dress powder ", and in winding-up tank, gas contains certain coal dust and can not directly outer arrange.When blast furnace needs emergent stopping coal injection according to operation, coal dust time of staying in winding-up tank is long, and owing to temperature reduces, coal dust easily condenses.Need coal dust is back to Pulverized Coal Bin.

Present pressure release and back powder have following technique: 1, set roof scrubber at Pulverized Coal Bin top, and gas, by extracting discharge by blower fan after roof scrubber dedusting, runs continuously.It exists increases investment, operating cost height, owing to roof scrubber blower press is less much than main air blower pressure total head, it is easily caused air and is drawn into Pulverized Coal Bin by roof scrubber outlet, Pulverized Coal Bin oxygen content is caused to exceed standard (when the full bituminous coal of blast furnace blowing or Mixture Density Networks, Pulverized Coal Bin oxygen content is not to be exceeded 12%).2, it is directly accessed coal collector, being extracted discharge by main air blower after coal collector dedusting, main air blower is consistent with grinding machine working system, can quit work after Pulverized Coal Bin coal dust is filled, when main air blower quits work, the gases at high pressure of winding-up tank pressure release are easily destroyed the burst disk of coal collector.3, as the gases at high pressure of winding-up tank pressure release are reclaimed by utility model patent " a kind of blast-furnace coal powder injection method and system thereof " (patent No.: CN101781692B), low-pressure gas pressure release is discharged to Pulverized Coal Bin or removing dust device, it has the disadvantage that the gases at high pressure of recovery contain coal dust, substantial amounts of coal dust can be stockpiled through certain time air accumulator, the recoverable gas of longtime running is very limited less than the 20% of its pressure release gas gross, and low-pressure gas enters Pulverized Coal Bin and easily damages the explosion-proof valve on Pulverized Coal Bin top.

Utility model content

For the problems referred to above, this utility model provides a kind of reduced investment, stable and reliable operation, the breeze blowing pressure release back powder system that operating cost is low.

nullFor reaching above-mentioned purpose,This utility model breeze blowing pressure release back powder system,Including raw coal being carried out fine grinding and dry grinding machine、By the coal collector that pipeline is connected with grinding machine、By the Pulverized Coal Bin that pipeline is connected with coal collector、By the winding-up tank that pipeline is connected with coal collector,Coal collector passes through pipeline communication main air blower,The pipeline of connection coal collector and main air blower is provided with the 3rd switching valve,Coal collector is connected by relief pipeline with winding-up tank,Described relief pipeline is provided with the high-pressure decompression valve and low-voltage decompression valve that are arranged in parallel,Winding-up tank is connected with pressurising fluidization system by pipeline and valve,Winding-up tank is by producing coal valve and pipeline is connected with winding-up pipeline,Winding-up pipeline is connected with air compensating system by pipeline and valve,Winding-up pipeline is by back powder valve、First switching valve is connected with grinding machine,Winding-up pipeline is by back powder valve、Second switching valve is connected with coal collector.

Further, high-pressure decompression valve nominal diameter is the 1/5~1/3 of low-voltage decompression valve nominal diameter.

Further, described coal collector connects pressure release blower fan by pipeline, the 4th switching valve.

This utility model breeze blowing pressure release back powder technique and system:

1, by winding-up tank relief pipeline is accessed coal collector, it is to avoid the impact to Pulverized Coal Bin of the pressure release gas, the service life of Pulverized Coal Bin top explosion-proof valve can be extended.

2, by being respectively provided with high-pressure decompression valve and low-voltage decompression valve, the impact to coal collector of the high pressure relief gas is reduced.

3, by arranging the first switching valve 1 and the second switching valve 21, it may be achieved during grinding machine work, the coal dust that winding-up tank returns can be reheated by grinding machine, reduces moisture, improves quality of pc, is conducive to breeze blowing.

4, by arranging pressure release blower fan, coal dust roof scrubber is cancelled, it is to avoid air is drawn into the generation of Pulverized Coal Bin by roof scrubber outlet, it is ensured that security of system.

5, by arranging pressure release blower fan, cancel coal dust roof scrubber, illustrate with 1 1000m3 level blast furnace, about 100,000 yuan can be reduced investment outlay, if roof scrubber blower fan and pressure release power of fan are all calculated by 7.5kW, pressure release blower fan every day minimum fewer than roof scrubber blower fan run 18 little time, every day can using electricity wisely 100 degree.

6, by arranging pressure release blower fan, the 3rd switching valve 2 and the 4th switching valve 131, it is to avoid when main air blower does not work, pressure release and the impact to coal collector of the back powder process mesohigh gas, reduce rate of breakdown.

Accompanying drawing explanation

Fig. 1 is this utility model breeze blowing pressure release back powder process flow diagram.

Detailed description of the invention

Below in conjunction with Figure of description, this utility model is further described.

What in example below, pressurising fluidisation air supply system adopted is nitrogen or other noble gas, and QI invigorating air supply system is compression air or other gas.

Embodiment

As it is shown in figure 1, the present embodiment Coalblowing system pressure release and back powder system, including

The coal collector 16 that raw coal is carried out fine grinding and dry grinding machine 1, is connected by pipeline with grinding machine, the Pulverized Coal Bin 12 being connected with coal collector by pipeline, the winding-up tank 9 that is connected with coal collector by pipeline.

Coal collector passes through pipeline communication main air blower 14, it is the 3rd switching valve 13 that the pipeline of connection coal collector and main air blower is provided with, coal collector is connected by relief pipeline with winding-up tank, described relief pipeline is provided with the high-pressure decompression valve 10 and low-voltage decompression valve 11 that are arranged in parallel, and high-pressure decompression valve nominal diameter is the 1/5~1/3 of low-voltage decompression valve nominal diameter.

Winding-up tank is connected with pressurising fluidization system 8 by pipeline and valve, winding-up tank is by producing coal valve 6 and pipeline is connected with winding-up pipeline 4, winding-up pipeline is connected with air compensating system 7 by pipeline and valve, winding-up pipeline switches valve 2 by back powder valve 5, first and is connected with grinding machine, and winding-up pipeline is connected with coal collector by back powder valve, the second switching valve 21.

Described coal collector connects pressure release blower fan by pipeline, the 4th switching valve 131.

The present embodiment Coalblowing system pressure release and back powder technique, including

A, raw coal carry out fine grinding and dry in grinding machine 1 simultaneously, qualified coal dust is extracted by main air blower 14 and is collected along pipeline entrance coal collector 16, being entered Pulverized Coal Bin 12 by coal collector 16 by pipeline, the coal dust in Pulverized Coal Bin 12 loads in winding-up tank 9 by control instruction.

Coal dust in B, winding-up tank 9 fluidizes through pressurising and coal dust is sent into after air supply system 8 pressurising fluidisation winding-up pipeline 4, by QI invigorating air supply system 7, coal dust is sent into blast furnace.

C, when winding-up tank 9 coal dust conveying after, open high-pressure decompression valve 10 and start pressure release, low-voltage decompression valve 11 is opened after pressure drops to setting pressure, relief pipeline is connected with coal collector 16, coal dust is loading coal powder cabin 12 after coal collector 16 is collected, and gas is discharged by after coal collector 14 dedusting after being extracted by main air blower 14.

D, after tank 9 pressure release completes when winding-up, close high-pressure decompression valve 10 and low-voltage decompression valve 11, carry out dress powder operation, enter the next winding-up cycle.E, after blast furnace should produce and needs requirement emergent stopping coal powder injection, coal dust must be back to Pulverized Coal Bin 12 after storing certain time in winding-up tank 9 by coal dust, only need to open back powder valve 5 when carrying out back powder operation, close blowing valve 3, coal dust can be sent into grinding machine 1 to be heated, coal dust is loading coal powder cabin 12 after coal collector collects 16 finally, and gas is discharged by after coal collector 14 dedusting after being extracted by main air blower 14.

Described technique C also includes technique C ', and described technique E also includes technique E '.

Wherein technique C ' is: when grinding machine 1 and main air blower 14 do not work, start pressure release blower fan 15, open the 4th switching valve 131 and stop main exhaust fan, close the 3rd switching valve 213, the gas of winding-up tank 9 pressure release extracts through pressure release blower fan 15 and discharges after by coal collector 16 dedusting, and coal dust is loading coal powder cabin 12 after coal collector 16 is collected.

Technique E ' is: when grinding machine 1 and main air blower 14 do not work, start pressure release blower fan 15, open the 4th switching valve 131 and stop main exhaust fan, close the 3rd switching valve 213, open the second switching valve 21, close the first switching valve 12, back powder gas is discharged by after coal collector 14 dedusting after being extracted by pressure release blower fan 15, and coal dust is loading coal powder cabin 12 after coal collector 16 is collected.

Being provided with pressure release blower fan after coal collector, when main air blower does not work, after coal collector, gas after dedusting discharges through pressure release blower fan.Relief pipeline is respectively equipped with high-pressure decompression valve and low-voltage decompression valve, high-pressure decompression valve nominal diameter is the 1/5~1/3 of low-voltage decompression valve nominal diameter, carry out pressure release when injection tank pressure is more than setting value by high-pressure decompression valve, reduce the impact on coal collector.Being provided with switching valve on back powder pipeline, in tank of jetting when grinding machine works, coal dust can be heated by back powder pipeline feeding grinding machine.

Above; it is only preferred embodiment of the present utility model; but protection domain of the present utility model is not limited thereto; any those familiar with the art is in the technical scope that this utility model discloses; the change that can readily occur in or replacement, all should be encompassed within protection domain of the present utility model.Therefore, protection domain of the present utility model should be as the criterion with the protection domain that claim defines.

Claims (3)

  1. null1. a breeze blowing pressure release back powder system,It is characterized in that: include raw coal carries out fine grinding and dry grinding machine、By the coal collector that pipeline is connected with grinding machine、By the Pulverized Coal Bin that pipeline is connected with coal collector、By the winding-up tank that pipeline is connected with coal collector,Coal collector passes through pipeline communication main air blower,The pipeline of connection coal collector and main air blower is provided with the 3rd switching valve,Coal collector is connected by relief pipeline with winding-up tank,Described relief pipeline is provided with the high-pressure decompression valve and low-voltage decompression valve that are arranged in parallel,Winding-up tank is connected with pressurising fluidization system by pipeline and valve,Winding-up tank is by producing coal valve and pipeline is connected with winding-up pipeline,Winding-up pipeline is connected with air compensating system by pipeline and valve,Winding-up pipeline is by back powder valve、First switching valve is connected with grinding machine,Winding-up pipeline is by back powder valve、Second switching valve is connected with coal collector.
  2. 2. breeze blowing pressure release back powder system according to claim 1, it is characterised in that: high-pressure decompression valve nominal diameter is the 1/5~1/3 of low-voltage decompression valve nominal diameter.
  3. 3. breeze blowing pressure release back powder system according to claim 1, it is characterised in that: described coal collector connects pressure release blower fan by pipeline, the 4th switching valve.
CN201620206979.2U 2016-03-17 2016-03-17 Buggy jetting pressure release returns whitewashed system CN205382183U (en)

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CN201620206979.2U CN205382183U (en) 2016-03-17 2016-03-17 Buggy jetting pressure release returns whitewashed system

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CN205382183U true CN205382183U (en) 2016-07-13

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105624351A (en) * 2016-03-17 2016-06-01 中冶华天南京工程技术有限公司 Pulverized coal jetting, pressure releasing and powder returning technology and system
CN108342576A (en) * 2018-02-28 2018-07-31 武汉工程大学 Cold rolling chromium-bearing sludge adding apparatus and its treatment process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105624351A (en) * 2016-03-17 2016-06-01 中冶华天南京工程技术有限公司 Pulverized coal jetting, pressure releasing and powder returning technology and system
CN105624351B (en) * 2016-03-17 2018-09-14 中冶华天南京工程技术有限公司 Breeze blowing pressure release back powder technique and system
CN108342576A (en) * 2018-02-28 2018-07-31 武汉工程大学 Cold rolling chromium-bearing sludge adding apparatus and its treatment process

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AV01 Patent right actively abandoned
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Granted publication date: 20160713

Effective date of abandoning: 20180914