CN2373163Y

CN2373163Y - Venturi

Info

Publication number: CN2373163Y
Application number: CN 99212019
Authority: CN
Inventors: 韩可兴
Original assignee: CHONGQING IRON STEEL DESIGN
Current assignee: CISDI Engineering Co Ltd
Priority date: 1999-05-14
Filing date: 1999-05-14
Publication date: 2000-04-12
Anticipated expiration: 2009-05-14

Abstract

The utility model belongs to a separating device for gaseous and solid mediums, particularly a first level venturi which is suitable for cleaning blast furnace gas. The venturi solves the problem of the short service lives of a rotor and a square throat opening body. The verturi is composed of a contraction section, the rotor, the square throat opening body, an expanding section, an electric (or manual) actuating mechanism, etc. The utility model is characterized in that the rotor is a cylinder, the cross section of which is circular. Both ends of the rotor are fixed on both walls of the square throat opening body through a shaft. The electric (or manual) actuating mechanism is connected with a shaft of the rotor outside the square throat opening body. Water mist nozzles are installed on the other two walls of the square throat opening body. The contraction section and the expanding section are respectively connected with the upper part and the lower part of the square throat opening body.

Description

A kind of Venturi tube

A kind of Venturi tube of the utility model belongs to a kind of gas, solid two-phase medium separator, is specially adapted to the one-level Venturi tube that blast furnace gas cleans.

Existing blast furnace gas cleaning device uses the twin-stage Venturi tube, and the one-level Venturi tube is that a kind of name is called R type Venturi tube, and it is made up of contraction section, R type rotor, square aditus laryngis body, expansion segment, electric operator etc.Wherein R type rotor is that a section is disciform cylinder, two ends are fixed on square aditus laryngis body two walls, electric operator links to each other with R type rotor in that the square aditus laryngis is external, and making R type rotor can serve as the different angle of axle rotation with the cylinder center: on other two walls of square aditus laryngis body hydraulic spray nozzle is installed.Grit in the high speed coal gas stream mixes, condenses with the water smoke at aditus laryngis place, slows down immediately at expansion segment high speed air-flow, and the grit sedimentation is separated from the gas, reaches the dedusting purpose.This kind Venturi tube is widely used in the two civilian systems of super-huge, the large and medium-sized blast furnace gas of China supernatant coal washing gas.Because the blast furnace gas dustiness is up to 2～6g/m ³R type rotor case and square aditus laryngis body wall are under the wearing and tearing and corrosion of high speed coal gas, water, dust, the general use was worn and corrosion failure in 3～5 years, if adjust the angle of rotor, though can change the abrasion position of rotor, but changed the channel sized of square aditus laryngis thus, made the velocity variations of coal gas stream, influenced efficiency of dust collection by the square aditus laryngis.The generation stove labour of blast furnace is about 20 years, therefore need repeatedly repair or change just and can keep ordinary production.This not only influences the ordinary production of blast furnace, and increases maintenance load, expenditure great number maintenance cost.

The purpose of this utility model is to provide a kind of Venturi tube, makes the service life of this device identical with State of Blast Furnace labour.

The utility model is achieved in that it is made up of contraction section, long-life type rotor, square aditus laryngis body, expansion segment, electronic (or manually) executing agency etc.Wherein the long-life type rotor is that a section is round cylinder, two ends are fixed on square aditus laryngis body two walls, electronic (or manually) executing agency links to each other with the long-life type rotor in that the square aditus laryngis is external, and making the long-life type rotor can serve as that axle rotates different an angle and a locked rotor position with the cylinder center; On other two walls of square aditus laryngis body, hydraulic spray nozzle is installed.

The utility model is because the rotor section is round, when abrasion takes place on both sides in the work, can serve as rotate a certain angle (0～180 °) and locked rotor position of axle with the cylinder center, its rotor case balancedly denuded, and do not change the aditus laryngis channel sized; Because eddy airstream is than lacking that R type rotor produces, air-flow is little, even to the aditus laryngis inner wall abrasion, so the long service life of rotor and square aditus laryngis body; Because eddy airstream is than lacking that R type rotor produces, when purification efficiency was identical, the pressure loss was little.The utility model not only can reduce maintenance time because its long service life can reach the order of generation State of Blast Furnace, improves the productivity ratio of blast furnace, and its direct economic benefit is considerable, and can save a large amount of maintenance costs.As a 4000m ³Its rotor of one-level Venturi tube in the blast furnace gas cleaning device weighs 3 tons, and the shell of rotor is heavily about 2 tons an of stainless steel, and square aditus laryngis body case material is stainless steel equally, and R type Venturi tube is repaired during stove order in 20 years then needs about 1,500,000 yuan maintenance cost 3 times.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the sectional schematic diagram of utility model.

Fig. 2 is the A-A sectional drawing of Fig. 1.

Part 1 is that round rotor, part 2 are that square aditus laryngis body, part 3 are that contraction section, part 4 are that expansion segment, part 5 are that electric operator, part 6 are hydraulic spray nozzles among the figure, and part 7 is water tanks, and BFG represents blast furnace gas.

Round rotor 1 two ends are installed in two wall centre positions of square aditus laryngis body 2 by axle, electric operator 5 links to each other with the axle at round rotor 1 two ends by shaft coupling, hydraulic spray nozzle 6 is installed on other two walls of square aditus laryngis body 2, hydraulic spray nozzle 6 is in water tank 7, and contraction section 3 and expansion segment 4 are connected to the upper and lower of square aditus laryngis body 1.The coal gas stream BFG of high dust-laden quickens at aditus laryngis 2 places by contraction section 3, water under high pressure is sent into water tank 7 and is mixed with the coal gas stream BFG of high dust-laden by nozzle 6 formation water smokes, grit cohesion in the coal gas stream, owing to slow down immediately at expansion segment 4 high speed air-flows, the grit sedimentation is separated from the gas, reaches the dedusting purpose.When the staff finds that from manhole abrasion takes place on the rotor both sides, electric operator 5 passes torque to rotor 1 by shaft coupling, axle with rotor 1 is rotate a certain angle (0～180 °) and locked rotor position of center, its rotor case is balancedly denuded, make synchronous purpose thereby reach with blast furnace generation stove.

Round rotor 1 two ends can directly be fixed by bolts on the two wall centre positions of square aditus laryngis body 2, when the staff finds that from manhole abrasion takes place on the rotor both sides, take bolt apart the certain angle of rotor rotation (0～180 °) and again that bolting is good.

Round rotor 1 two ends directly are fixed on the two wall centre positions of square aditus laryngis body 2 by axle and bolt.

Claims

1 one kinds of Venturi tubes, it is made up of contraction section, rotor, square aditus laryngis body, expansion segment, electronic (or manually) executing agency etc., it is characterized in that rotor is that a section is round cylinder, two ends are fixed on the square aditus laryngis body two wall centre positions by axle, electronic (or manually) executing agency links to each other with armature spindle in that the square aditus laryngis is external, on other two walls of square aditus laryngis body hydraulic spray nozzle is installed, contraction section and expansion segment are connected to the upper and lower of square aditus laryngis body.

2 a kind of Venturi tubes according to claim 1 is characterized in that round two ends of rotor directly is fixed on the square aditus laryngis body two wall centre positions by bolt.

3 a kind of Venturi tubes according to claim 1 is characterized in that round two ends of rotor directly is fixed on the square aditus laryngis body two wall centre positions by axle and bolt.