CN105775754B - A kind of injection tank pressure relief device of positive pneumatic transport - Google Patents
A kind of injection tank pressure relief device of positive pneumatic transport Download PDFInfo
- Publication number
- CN105775754B CN105775754B CN201610274551.6A CN201610274551A CN105775754B CN 105775754 B CN105775754 B CN 105775754B CN 201610274551 A CN201610274551 A CN 201610274551A CN 105775754 B CN105775754 B CN 105775754B
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- Prior art keywords
- pressure
- valve
- pipeline
- pressure release
- injection tank
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A kind of injection tank pressure relief device of positive pneumatic transport, belong to blast furnace ironmaking coal injection technical field.Including relief pipeline, pressure release stop valve, expansion joint, pressurised pipeline, equalizer valve, decompression control valve, relief pipeline pressure detecting, injection tank pressure detection；On relief pipeline at the top of injection tank, pressure release stop valve, expansion joint, pressurised pipeline, relief pipeline pressure detecting and decompression control valve are connected with turn；Equalizer valve is set on pressurised pipeline；Detected in addition, being provided with injection tank pressure at the top of injection tank；When performing pressure discharge operations, equalizer valve is first opened, pressurising is carried out to the pipeline after pressure release stop valve using pressurised pipeline, after specified pressure to be achieved, equalizer valve is closed, opens pressure release stop valve, decompression control valve successively, and pressure release air velocity is controlled by decompression control valve.Advantage is, can control air velocity, reduces the abrasion of pressure release stop valve and the live load of powder equipment is received in control pressure release.
Description
Technical field
The invention belongs to blast furnace ironmaking coal injection technical field, more particularly to a kind of positive pneumatic transport injection
Tank pressure relief device, suitable for blast furnace ironmaking Coalblowing system, and it is also applied in air-transport system similar therewith, can has
Effect improves the life-span of injection tank pressure relief device, and reduces the live load that powder equipment is received in pressure release.
Background technology
Blast furnace ironmaking coal injection is a kind of regulation working of a furnace, reduce coke consumption, beneficial to smooth operation of furnace and reduce the pig iron into
This effective means.Bf coal injection system uses positive pneumatic transport technology, and the technique typically presses following circulate operation：Injection tank
The loaded material under atmospheric pressure state；After the completion of charging, injection tank is carried out being pressurized to specified pressure as needed；Then open
The transfer valve of injection tank, that is, start to convey material；At the end of operation to be conveyed, close transfer valve and stop conveying；Finally open and let out
Pressure valve carries out pressure discharge operations, and air venting in tank to dedusting is diffused into equipment；After injection tank pressure reaches atmospheric pressure, you can accurate
It is standby to carry out charging next time conveying operations.
, it is necessary to which continuous and stable pulverized coal conveying, is generally adopted in pulverized coal injection in blast furnace (and similar Geldart-D particle) system
It is arranged in juxtaposition with the injection tank of 2 or more than 2, alternately defeated powder, therefore coal dust can not spray sky, it is necessary to stay partial bottom in injection tank
Material, and gas pressure is higher in tank, and so during pressure discharge operations, especially the starting stage, the gas flow rate released is very fast,
And miscellaneous a large amount of coal dusts are oozed, pressure relief valve and pipeline can be caused to wear, reduce valve and pipeline life；It is and instantaneous during pressure release
Flow is larger, can increase the processing load that equipment is diffused in follow-up dedusting, and have more to the quality and sealing of associated devices
High requirement.
At present, the universal practice of pressure relief device is that one or several cut-outs being arranged in juxtaposition are set at injection tank pressure relief opening
Valve, and restriction orifice is set on pipeline, after opening relief valve, the flow velocity of pulverized coal borne air flow is only reduced by restriction orifice, so as to
Reduce valve wear and cleaner load.But in terms of practical situations, this mode can not effectively improve the pressure relief device longevity
Life and reduction abrasion.
The content of the invention
It is an object of the invention to provide a kind of injection tank pressure relief device of positive pneumatic transport, solve in Geldart-D particle
Injection tank pressure leak process with pressure the problem of bringing, can effectively control air velocity, to improve pressure relief device service life, reduce
The live load of equipment is diffused in dedusting.
The present invention includes relief pipeline 1, pressure release stop valve 2, expansion joint 3, pressurised pipeline 4, equalizer valve 5, decompression control valve
6th, relief pipeline pressure detecting 7, injection tank pressure detection 8；On the relief pipeline 1 set at the top of injection tank, it is connected with turn and lets out
Press stop valve 2, expansion joint 3, pressurised pipeline 4, relief pipeline pressure detecting 7 and decompression control valve 6；Set and fill on pressurised pipeline 4
Pressure valve 5；In addition, injection tank pressure detection 8 is provided with the top of injection tank；When performing pressure discharge operations, equalizer valve 5 is first opened, using filling
Pressure pipeline 4 carries out pressurising to the pipeline after pressure release stop valve 2, and pressurized gas can use nitrogen or compressed air etc., finger to be achieved
Constant-pressure or after the time, equalizer valve 5 is closed, open pressure release stop valve 2, decompression control valve 6 successively, and pass through decompression control valve 6
To control pressure release air velocity.
Pressurised pipeline 4, the relief tube after before performing pressure discharge operations to pressure release stop valve 2 are provided with after pressure release stop valve 2
Road has carried out pressurising.
The pressure relief device is controlled using two-stage series connection, i.e., one-level is used for cutting-off controlling, and another level is used for adjustment control；Every grade
1 valve can be used, can also be arranged in juxtaposition using 2 and above valve and coordinate unlatching, to reach more precise control
The purpose of pressure release speed.
The invention can greatly improve the pressure relief valve service life of injection batch can with pressure, effectively control compared with present technology
The instantaneous processing air quantity that equipment is diffused in follow-up dedusting is made, simple in construction, easily operation, ensureing system stable operation, reducing system
Maintenance etc. of uniting has extremely long-pending effect.
Brief description of the drawings
Fig. 1 is a kind of the injection tank pressure relief device and process schematic representation of the present invention.Wherein, relief pipeline 1, pressure release stop valve
2nd, expansion joint 3, pressurised pipeline 4, equalizer valve 5, decompression control valve 6, relief pipeline pressure detecting 7, injection tank pressure detection 8.
Embodiment
As shown in figure 1, the present invention include relief pipeline 1, pressure release stop valve 2, expansion joint 3, pressurised pipeline 4, equalizer valve 5,
Decompression control valve 6, relief pipeline pressure detecting 7, injection tank pressure detection 8；On the relief pipeline 1 set at the top of injection tank, according to
It is secondary to be connected with pressure release stop valve 2, expansion joint 3, pressurised pipeline 4, relief pipeline pressure detecting 7 and decompression control valve 6；Pressurised pipeline
Equalizer valve 5 is set on 4；In addition, injection tank pressure detection 8 is provided with the top of injection tank.
When performing pressure discharge operations, equalizer valve 5, the relief tube using pressurised pipeline 4 to the rear portion of pressure release stop valve 2 are first opened
Road 1 carries out pressurising；When the pressure measured by relief pipeline pressure detecting 7 and identical or close injection tank pressure detection 8 or reach
To specified time, equalizer valve 5 is closed, opens pressure release stop valve 2；Then turn on decompression control valve 6, according to the pressure of injection tank come
The aperture of decompression control valve 6 is controlled, so that pressure release gas flow rate and flow are being controlled in suitable scope.For to greatest extent
Reduce abrasion, air velocity is preferably controlled within 20m/s, and gas flow is no more than the maximum processing capability that equipment is diffused in dedusting.
Pressure inside the tank to be blown reaches setting pressure (close to atmospheric pressure), and decompression control valve 6 is opened completely, that is, completes this pressure release
Journey.
Claims (1)
1. a kind of injection tank pressure relief device of positive pneumatic transport, including relief pipeline, pressure release stop valve, expansion joint, pressurising pipe
Road, equalizer valve, decompression control valve, relief pipeline pressure detecting, injection tank pressure detection；Characterized in that, at the top of injection tank
On relief pipeline (1), pressure release stop valve (2), expansion joint (3), pressurised pipeline (4), relief pipeline pressure detecting are connected with turn
And decompression control valve (6) (7)；Equalizer valve (5) is set on pressurised pipeline (4)；Examined in addition, being provided with injection tank pressure at the top of injection tank
Survey (8)；When performing pressure discharge operations, equalizer valve (5) is first opened, the pipeline after pressure release stop valve (2) is entered using pressurised pipeline (4)
Row pressurising, after specified pressure to be achieved, equalizer valve (5) is closed, open pressure release stop valve (2), decompression control valve (6) successively, and
Pressure release air velocity is controlled by decompression control valve (6)；
Pressurised pipeline (4) is provided with afterwards in pressure release stop valve (2), to pressure release stop valve (2) pressure release afterwards before pressure discharge operations are performed
Pipeline has carried out pressurising；
The pressure relief device is controlled using two-stage series connection, i.e., one-level is used for cutting-off controlling, and another level is used for adjustment control；Every grade of use
1 valve, or be arranged in juxtaposition using 2 and above valve and coordinate unlatching, to reach the mesh of more precise control pressure release speed
's.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610274551.6A CN105775754B (en) | 2016-04-27 | 2016-04-27 | A kind of injection tank pressure relief device of positive pneumatic transport |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610274551.6A CN105775754B (en) | 2016-04-27 | 2016-04-27 | A kind of injection tank pressure relief device of positive pneumatic transport |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105775754A CN105775754A (en) | 2016-07-20 |
| CN105775754B true CN105775754B (en) | 2018-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610274551.6A Active CN105775754B (en) | 2016-04-27 | 2016-04-27 | A kind of injection tank pressure relief device of positive pneumatic transport |
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| Country | Link |
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| CN (1) | CN105775754B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108267197B (en) * | 2018-01-17 | 2020-03-20 | 中广核核电运营有限公司 | Liquid level transmitter calibration device and calibration method thereof |
| CN109928215A (en) * | 2019-04-16 | 2019-06-25 | 中冶赛迪技术研究中心有限公司 | A kind of balk cargo pneumatic conveying experimental provision and method |
| CN110724777B (en) * | 2019-11-18 | 2021-08-31 | 大峘集团有限公司 | Coal powder injection tank pressure relief system and working method thereof |
| CN115268523B (en) * | 2022-09-29 | 2023-01-06 | 深圳天润控制技术股份有限公司 | Micro-pressure stabilizing device and micro-pressure stable output method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US703120A (en) * | 1900-07-30 | 1902-06-24 | American Pneumatic Service Co | Pneumatic-carrier system. |
| CN201464231U (en) * | 2009-07-31 | 2010-05-12 | 西安科灵节能环保仪器有限公司 | Pulverized coal piping sampling system |
| CN202415487U (en) * | 2011-12-15 | 2012-09-05 | 濮阳龙宇化工有限责任公司 | Pressure relief and ash removal device for pulverized coal feed tank |
| CN104046395A (en) * | 2014-02-15 | 2014-09-17 | 和楷哲 | Solid-gas mixed material pressure continuous-reduction technology and system and equipment therefor |
-
2016
- 2016-04-27 CN CN201610274551.6A patent/CN105775754B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US703120A (en) * | 1900-07-30 | 1902-06-24 | American Pneumatic Service Co | Pneumatic-carrier system. |
| CN201464231U (en) * | 2009-07-31 | 2010-05-12 | 西安科灵节能环保仪器有限公司 | Pulverized coal piping sampling system |
| CN202415487U (en) * | 2011-12-15 | 2012-09-05 | 濮阳龙宇化工有限责任公司 | Pressure relief and ash removal device for pulverized coal feed tank |
| CN104046395A (en) * | 2014-02-15 | 2014-09-17 | 和楷哲 | Solid-gas mixed material pressure continuous-reduction technology and system and equipment therefor |
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| Publication number | Publication date |
|---|---|
| CN105775754A (en) | 2016-07-20 |
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