CN103586248B

CN103586248B - Dust removal system and method for dry method furnace tube knotting process

Info

Publication number: CN103586248B
Application number: CN201210288100.XA
Authority: CN
Inventors: 李春林
Original assignee: Permanent Beihai Tiancheng Technology Development Ltd Co
Current assignee: Permanent Beihai Tiancheng Technology Development Ltd Co
Priority date: 2012-08-14
Filing date: 2012-08-14
Publication date: 2017-02-08
Anticipated expiration: 2032-08-14
Also published as: CN103586248A

Abstract

Disclosed is a dust removal system and method for the dry method furnace tube knotting process. The efficient dust removal method which can adapt to the current manual operation and can be suitable for the automatic operation which is transformed in the future is designed out based on the research which is performed on the traditional manual furnace tube knotting process. According to the dust removal method for the dry method furnace tube knotting process, an annular dust hood which is suitable for the furnace tube knotting is designed first, then a novel discharging hopper is designed, and accordingly an operator can discharge materials and efficiently collect dust simultaneously as usual through the standardized operation process.

Description

A kind of dust pelletizing system for dry method furnace tube knotting operation and dust collection method

First, technical field

The present invention is applied to the dedusting of ferroalloy enterprise furnace tube knotting.

2nd, background technology

Ferroalloy enterprise is the severely afflicated area of dust pollution, and except traditional smelting process, many operations of production process are all Substantial amounts of dust can be produced, and because the automaticity of most of operation is not high, and dedusting may not considered when designing Etc. factor, cause very big difficulty to dedusting.The knotting of dry method furnace tube be by dry magnesia or broken after slag pass through under Arrive a process of furnace tube outer ring under hopper, substantial amounts of airborne dust can be produced from hopper to furnace tube, in furnace tube vibration processes Substantial amounts of airborne dust can be produced, traditional dust collection method be by furnace tube knotting operation be put into an airtight room it is ensured that dust not Excessive, but the dust concentration of operating post can not be reduced, and invest also larger.The furnace tube knotting operation of present invention description is removed Dirt is exactly the furnace tube ramming process that have studied traditional-handwork, works out one kind on this basis and had both been suitable for manual operations side at present The high-effective dust-removing of FAXIA, and automatization in future can be suitable for and change the dedusting after walking.

3rd, content of the invention

The present invention is to design a kind of high-efficiency dust removal system, and appropriate reconstruction operating procedure, can be reached with minimum air quantity To best dust removing effects, and operator can keep present operating habit constant substantially.

The present invention is realized in：First, design the double-deck suspended hood of a umbrella, diameter is equal to the outer of knotting road cylinder Footpath, mainly using the annulus air channel between double casing come dust suction, the width of annulus is equal or smaller with the width of knotting slag, protects Card is efficient to trap airborne dust；Secondly, design one is rotatably connected, and designs hoisting mechanism, allows and does not need to remove in placement furnace tube etc. When dirt, dust excluding hood can be promoted to the position parallel with wall, and operative employee can be with normal operating；Finally, transform now Hopper, present hopper lower limb and discharging opening is transformed into set lower limb and the sleeve of dismountable moving, shorten hopper and furnace tube away from From discharging opening, closer to furnace tube, facilitates operator's blanking, will not clash into dust excluding hood, reduces airborne dust and is easy to land again.

The feature of the present invention：First, double-deck dust shield of design, allow air quantity focus on the place of dust, dust collection efficiency is high, Operating post does not have dust；Second, design can lift to obtain mechanism, allows fan housing to lift in not dedusting, without prejudice to crane etc. its He operates；3rd, transform discharging hopper structure, but operative employee can keep present mode of operation without prejudice to dust shield.

4th, brief description：

Accompanying drawing 1：Fan housing design drawing；

Accompanying drawing 2：Fan housing lifts schematic diagram；

Accompanying drawing 3：Drain hopper transforms schematic diagram；

Accompanying drawing 4：Schematic diagram is collected in dedusting；

Accompanying drawing 5：General umbrella cover dedusting schematic diagram；

Accompanying drawing 6：Double-deck annular umbrella-like cover dedusting schematic diagram.

5th, specific embodiment

Taking the furnace tube of 3000KVA iron alloy electric furnace as a example, a diameter of 2.4 meters of furnace tube, a height of 1.18 meters.

One) specification：

1. fan housing：Refer to design instruction accompanying drawing 1

2. lifted：Refer to Figure of description 2

3. hopper refers to Figure of description 3

4. dust removing effects explanation refers to explanation accompanying drawing 5 and explanation accompanying drawing 6：

Two) working condition explanation：

1. furnace tube SBR：

Before furnace tube knotting, operative employee will clean place, and furnace tube is hung at vibration platen from storeroom, and stove circle is solid Determine to support, at this time, above platform, have crane, and someone's operation, fan housing is in rise and presses close to wall, to the impact producing Minimum.

2. furnace tube charging state：

After getting out charging, dust excluding hood is put down and aligns with furnace tube, open air-supply switch simultaneously, or by dropping to For signalisation intelligent air supply system, dust pelletizing system operation, the suction at dust excluding hood air port is up to 6M/S, powder after hopper blanking Dirt has up rushed, and is inhaled into dedusting pipeline, until charging terminates.Dust will not be escaped from, and operator post dust can reach Post standard.

3. furnace tube vibrational state：

Furnace tube vibrational state and furnace tube charging state can be alternately it is also possible to carry out simultaneously, and cleaner is in work State.

4. completion statuses：

Furnace tube knotting completes, and furnace tube will be transferred from, and carry out other work, and dust excluding hood rises, and is not take up work space.

Three) dust excluding hood effect explanation：

Do not consider blast, atmospheric density, etc. extrinsic factor impact, two kinds of dust excluding hoods are in perfect condition：

If main pipeline wind speed V=20m/s, outside a diameter of D=0.45m of main pipeline, dust excluding hood collar extension diameter d=2.4m, interior Mouth is straight

In the d of footpath=2.27m calculated：

1. main pipeline air quantity：

According to air quantity L=V F (V wind speed；F section)

L=V F=V (D/2) 2 π=20m/s × (0.45/2m) 2 × 3.14=3.18m3/s

2. general umbrella dust excluding hood wind speed calculates：

Cover mouth section F1=(outside d/2) 2 π=(2.4/2m) 2 × 3.14=4.52m2

L=V1 F1V1=L/F1 event：V1≈0.79m/s

3. double-deck annular umbrella-like dust excluding hood wind speed calculates：

Cover mouth section F2=[(outside d/2) 2- (in d/2) 2] π=[(2.4m/2) 2- (2.27m/2) 2] × 3.14= 0.48m2

L=V2 F2V2=L/F2 event：V2≈6.67m/s

Calculated according to above, under identical air quantity F, the size of wind speed V is mainly determined F=V L by sectional area F；Double-deck The draught area that the design of cover makes air channel than the design of universal cover reduces about 10 times, so the wind speed of double casing is than the wind of common cover Speed improves about 10 times.Under same air quantity, double-deck annular umbrella-like dust excluding hood can reach dust removing effects the most excellent, is people from post Member avoids the injury of dust；If under identical wind speed, the design of double-deck annular umbrella-like dust excluding hood makes main pipeline wind speed reduce About 10 times, therefore reach the dust removing effects of efficient energy-saving.

Claims

1. a kind of for dry method furnace tube tie a knot operation dust pelletizing system it is characterised in that：It is provided with dedusting above described furnace tube Cover；The external diameter of described dust excluding hood is maintained an equal level with described furnace tube external diameter；The dust that furnace tube produces when tiing a knot operation removes described in being inhaled into In dust hood；Described dust excluding hood is double-decker, and lower floor closes, and two interlayers form endless belt；Described endless belt shape around furnace tube Become the suction concentrated, the dust producing around stove circle is inhaled into dust excluding hood；The side of the top of described dust excluding hood is provided with hinge structure The hoisting mechanism becoming；Dust excluding hood is designed to rotate around lower horizontal cleaning shaft, when equipment is not at dust removal state, by carrying Rise mechanism and the lifting of described dust excluding hood is rotated to position perpendicular to the ground, convenient working；Described dust excluding hood is double-deck annular umbrella-like Dust excluding hood；For the hopper feeding to furnace tube, its underpart has the extension tube that can be socketed；After hopper is sling, by described extension tube In connection, and stretch into and fed between described dust excluding hood and described furnace tube；Described hopper lower limb and discharging opening are dismountable moving Set lower limb and sleeve.

2. the method that a kind of dust pelletizing system of the dry method furnace tube knotting operation described in application claim 1 carries out dedusting, its feature For：Dust excluding hood is lifted, after hanging furnace tube, circular cowling is put down, automatic dedusting；Hopper is connected extension tube and is directed at stove The ring-shaped charging band of cylinder carries out blowing；After the completion of furnace tube knotting, dust excluding hood is lifted, hang away furnace tube and enter next circulation.