CN2720430Y - Real-time on-line measuring device for particle diameter distribution of blast furnace gas mud whirl after removing zinc - Google Patents

Abstract

The utility model discloses a real-time on-line measuring device for the particle diameter distribution of the blast furnace gas mud whirl after removing zinc, comprising a collection, dispersion, and concentration adjustment part composed of two adjusters and a drainage apparatus, a measuring section composed of a light window, a laser, and a receiver, and a computer control part provided with an inner and an outer controllers. Gas mud from the outlet of the cyclone is connected to and controls the interval sampling through the reverse Y-shaped triplet and three electromagnetic valves on the upper parts of the two adjusters, and the gas mud from the outlet of the cyclone is switched between the two adjusters. The upper parts of the adjusters are connected to an industrial circulating water system through the electromagnetic valves; the lower parts of the two adjusters are connected with the branch pipe of the drainage apparatus through the electromagnetic valves; one end of the straight pipe section of the drainage apparatus is connected with the industrial circulating water system through the electric control valves; the other end is connected with the lower end of the light window; the upper end of the light window is connected with a vacuum pressure filter; the laser and the receiver are arranged on both sides of the light window; and the output of the receiver is connected with a computer. The utility model learns the operating condition of the hydraulic cyclone by monitoring the particle distribution of the zinc removing and recycling art of the blast furnace gas mud in a real-time and on-line mode, ensures the safety of the operation of the blast furnace, extends the service life of the blast furnace, improves the reusable rate of the gas mud, and reduces the production cost.

Description

Size distribution real-time online measuring device after the dezincify of blast furnace gas mud eddy flow

Technical field

The utility model relates to a kind of measurement mechanism that the steel plant blast furnace gas muds is handled, and more particularly, it relates to size distribution real-time online measuring device after the dezincify of a kind of blast furnace gas mud eddy flow.

Background technology

In the blast furnace ironmaking process, produce the trickle stove dirt of a large amount of iron content, carbon, after processes such as control of dust, washing, can form gas mud.This gas mud is good iron-smelting raw material, but owing to the content of zinc in the gas mud is higher, direct reuse can influence the serviceable life of blast furnace.For excavating its potential economic benefit and avoiding causing serious environmental to pollute because of throwing aside gas mud, over nearly one, 20 year, developed the new technology of some blast furnace gas mud dezincify reuses both at home and abroad, wherein to have technology simple because of it for hydraulic cyclone method, and equipment investment is few, and is easy to implement, easy to maintenance, operating cost is low, and characteristics such as non-secondary pollution have been subjected to common concern.This method is carried out wet classification to the particle in the blast furnace gas mud by particle diameter, thereby gas mud is separated into contains fine grain high zinc mud (be called top stream) and contain coarse grained low zinc mud (being called underflow), the former sends place such as cement mill outside and utilizes after dehydration, the latter as the raw material of ironmaking, reaches the purpose of discarded object decrement and resource behind dehydration, sintering.This method is on the ironmaking streamline during actual operation, because component, concentration, the flow of supplied materials may often change, can influence the separating effect of hydrocyclone, need the working condition of hydrocyclone is monitored in real time for this reason, reclamation rate in the factory that contains zinc rate and gas mud of control underflow, wherein measure the furnace charge particle grain size distribution, not only can understand the separating effect of hydrocyclone, and can estimate indirectly and contain the zinc rate.Yet underflow after the rotational flow separation and top stream granule density are that solid content is still very high, must promptly to guarantee uncorrelated single scattering behind the dilution for many times, could measure particle with light scattering method, when measuring such as usefulness FAM laser diffraction and scattering particle size analyzer, concentration and measurement zone thickness just there are certain requirement, generally use shading rate OB=1-I/I ₀The index of concentration control during as measurement.Owing to the accuracy that should guarantee to take a sample, satisfy the requirement of shading rate again by dilution for many times, realize that real-time online measuring has suitable difficulty, in hydraulic cyclone method blast furnace gas mud dezincify reuse technology, also do not have the real-time online measuring particle size distribution at present.

Summary of the invention

The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of and can monitor hydraulic cyclone method blast furnace gas mud dezincify reuse technology process in real time, improve the operation of blast furnace security, reach reclamation rate in the maximum gas mud factory, the device of size distribution real-time online measuring after the blast furnace gas mud eddy flow dezincify that reduces production costs.

The technical solution of the utility model is: size distribution real-time online measuring device after the dezincify of a kind of blast furnace gas mud eddy flow, it is between cyclone outlet and vacuum press filter, it is characterized in that, it comprises by two identical adjuster and collection, dispersion, concentration adjustment member that flow diverter is formed that carry stirring apparatus, measuring section of being made up of optical window, laser instrument and receiver and the computer control part that has internal controller, outer controller; Two identical adjusters are used alternatingly, by the computing machine sequential control.Adjuster top is column type, and the bottom is tapered, a built-in stirrer, stirrer continuous working.From the gas mud of cyclone outlet by two adjuster tops inverted Y-shaped threeway and the sampling that is interrupted of three solenoid valve interlock control and between two adjusters, switch, i.e. three ports of inverted Y-shaped threeway connect cyclone outlet, adjuster, vacuum press filter respectively.The solenoid valve of sample tap is near inverted Y-shaped center.Adjuster top also has pipeline to be connected with the industrial cycle water system by the solenoid valve that is provided with separately.Two adjuster bottoms are connected with the arm of flow diverter by the solenoid valve on the pipeline separately, straight length one end of flow diverter is connected with the industrial cycle water system by electric control valve, the other end is connected with the lower end of optical window, the upper end of optical window is connected with vacuum press filter, laser instrument and receiver place the both sides of optical window, and the output of receiver is connected with computing machine.

The beneficial effects of the utility model are: the utility model can in time be found to worsen the insecurity that causes because of cyclone work.Distribution of particles by real time and on line monitoring hydraulic cyclone method blast furnace gas mud dezincify reuse technology, understand the working condition of hydrocyclone, guaranteed the security of operation of blast furnace, prolong the serviceable life of blast furnace, simultaneously improve reclamation rate in the gas mud factory greatly, reduced production cost.

Description of drawings

Fig. 1 is a size distribution real-time online measuring device synoptic diagram after the dezincify of blast furnace gas mud eddy flow.

Embodiment

By shown in Figure 1, the gas mud that blast furnace gas wash water system 0 produces after over-richness is adjusted groove 1 dilution, is squeezed into cyclone 3 by main pump 2.Be this device armamentarium connection diagram in the empty frame, this device is between cyclone outlet and vacuum press filter, top stream is in full accord with the real-time online measuring device of underflow, expression is the real-time online measuring device of underflow in the empty frame of Fig. 1, and the utility model will be further described below in conjunction with accompanying drawing 1.Size distribution real-time online measuring device after the dezincify of a kind of blast furnace gas mud eddy flow, it is between cyclone 3 outlets and vacuum press filter 23, be characterized in, it comprises by two identical adjuster 9, adjuster 10 and collection, dispersion, concentration adjustment member that flow diverter 14 is formed that carry stirring apparatus, measuring section of being made up of optical window 15, laser instrument 17 and receiver 16 and the control section that has internal controller 21, outer controller 22 and computing machine 20; Two adjusters, 9,10 tops have a pipeline to be connected with industrial cycle water system 19 by solenoid valve 7,8, one inverted Y-shaped threeway is also respectively arranged in addition at two adjusters, 9,10 tops, inverted Y-shaped upper port is connected with the export pipeline of cyclone 3, one end of following fork is connected with adjuster by solenoid valve 6,4, the other end also is connected with vacuum press filter 23 by solenoid valve 5, and solenoid valve 4,5,6 is realized the sampling of interlock control gaps and in 9,10 switchings of two adjusters.The solenoid valve 11,12 that two adjusters, 9,10 bottoms have a pipeline to pass through separately is connected with the arm of flow diverter 14, the straight length upper end of flow diverter 14 is connected with industrial cycle water system 19 by electric control valve 13, the lower end is connected with the lower end of optical window 15, the upper end of optical window 15 is connected with vacuum press filter 23, laser instrument 17 and receiver 16 place the both sides of optical window 15, and the output of receiver 16 is connected with computing machine 20.

Described measuring section is the glass optical window that an inner channel is 6mm * 6mm, and the long 15cm of optical window erects and is fixed on the platform that is placed on laser particle sizer, and shock insulation seat 18 is arranged at the platform bottom, and optical window 15 adopts with pipeline and is flexible coupling 24.The laser instrument 17 and the receiver 16 of laser particle sizer are positioned at optical window 15 both sides, and laser vertically passes optical window 15 from the side, and fluid flows through in optical window 15 from bottom to top.

Described internal controller 21 is connected with computing machine by interface, the analog input channel of internal controller is by signal processing apparatus, the multipath conversion sampling thief, sampling keeps and amplifier, A/D converter, compositions such as sampling controller, the switching value input channel is by signal processing apparatus, sampling switch, read the loop, counter register, compositions such as sampling controller, the analog output channel is by D/A converter, multicircuit switch, controllable silicon regulator, compositions such as implementation controller, the switching value output channel is by interface circuit, multicircuit switch, relay, compositions such as contactor.

The course of work of the present utility model:

The utility model is when work, by computing machine 20 being used alternatingly by internal controller 21 sequential control adjusters 9, adjuster 10, regulate each valve unlatching, close and aperture, adjust gas mud sample period and sample time, adjust the gas mud and the mixed concentration of industrial circulating water of flow diverter 14 outlets, adjust cyclone inlets concentration and intake pressure by outer controller 22.Therefore internal controller 21 is used for measuring control, except sequential control adjuster 9 adjusters 10 be used alternatingly and the laser particle sizer duty, also receive from laser particle sizer center light fulgurite current changing signal by A/D, regulate foundation as the OB value, and the aperture by D/A variable valve 13 is to satisfy the condition of uncorrelated single scattering; Outer controller 22 flows particle distribution characteristics value in conjunction with other information as the top according to the particle distribution characteristics value that laser particle sizer light target electric signal calculates, incoming flow particle distribution characteristics value before cyclone separates, underflow, top stream and incoming flow actual measurement contain the duty that the zinc rate is controlled cyclone 3.

The sampling of measuring process branch, dilution dispersion, the adjustment of OB value, measurement statistics, flushing, water storage be totally 6 steps, constitutes a measuring period.More particularly, valve 4 leaves, valve 5,6 closes, and is adjuster 10 samplings; Valve 6 leaves, valve 4,5 closes, and be adjuster 9 samplings: valve 5 leaves, valve 4,6 closes, and for sampling keeps, and this moment, gas mud flowed directly into vacuum press filter 23.What of sample are the length of sample time determined, owing under isoconcentration, measure, promptly determined the number of times of measuring, again because results averaged, so total Measuring Time and the measuring accuracy of sample time and this sub-sampling is directly proportional, but is inversely proportional to real-time, promptly sample time is long more, a measuring period is also long more, and real-time is poor more.Adopt two adjusters to be used alternatingly, exactly in order to strengthen real-time.The length of a measuring period will be determined when practical operation as the case may be.Each cycle sequence consensus of two adjusters but differed for two steps, promptly during adjuster flushing finishing a beginning water storage, optical window section 15 switches to another adjuster and begins the adjustment of OB value, then order execution separately.After adjuster 9 sampling, dilution and by the dispersion certain hour that stirs in the industrial circulating water of the sample of being got in adjuster.At the sampling and diluting scatter stage, valve 7,8,11,12 all is in closed condition.Open valve 11,13 then, utilize the draft of variable valve 13 current to drive, the optical window 15 of flowing through after sample to be tested being mixed dilute again flow diverter 14 in, the aperture of the OB value variable valve 13 that measures according to laser particle sizer, when the OB value is suitable, allow the information of laser particle sizer opening entry distribution of particles.By the time the mud stream in the adjuster 9 are intact, and the OB value signal drops to the lower limit of permissible value, and shut-off valve 13 is fully opened valve 7 flushing that discharges water.When the OB value was zero, shut-off valve 11 was opened valve 12,13 simultaneously, and optical window section 15 switches to another adjuster 10 beginning OB values and adjusts, and carries out with adjuster 9 the same orders then; And these hour corrector 9 beginning water storages, when the level sensor in adjuster 9 is indicated to predetermined water level, shut-off valve 7, adjuster 9 is waited for sampling of following one-period.Depart from the permissible value scope if contain the zinc rate according to the underflow of distribution of particles measurement result estimation, aperture by outer controller 22 operation valves 25,26,27,28,29, to regulate cyclone inlets concentration and intake pressure, contain under the prerequisite that the zinc rate do not exceed standard at underflow, reach reclamation rate in the maximum gas mud factory.

Claims (2)

1, size distribution real-time online measuring device after the dezincify of a kind of blast furnace gas mud eddy flow, it is positioned between cyclone (3) outlet and the vacuum press filter (23), it is characterized in that, it comprises collection, dispersion, the concentration adjustment member of being made up of two identical adjuster (9), adjuster (10) and flow diverters (14) that carry stirring apparatus, measuring section of being made up of optical window (15), laser instrument (17) and receiver (16) and the control section that has internal controller (21), outer controller (22) and computing machine (20); Two adjusters (9,10) there is a pipeline on top by solenoid valve (7,8) be connected with industrial cycle water system (19), two adjusters (9,10) an inverted Y-shaped threeway is also respectively arranged in addition at top, inverted Y-shaped upper port is connected with the export pipeline of cyclone (3), one end of following fork is by solenoid valve (6,4) be connected with separately adjuster, the other end also is connected with vacuum press filter (23) by solenoid valve (5), solenoid valve (4,5,6) realize interlock control gap sampling and at two adjusters (9,10) switch, two adjusters (9,10) solenoid valve (11 of a pipeline by separately arranged at the bottom, 12) arm with flow diverter (14) is connected, the straight length upper end of flow diverter (14) is connected with industrial cycle water system (19) by electric control valve (13), the lower end is connected with the lower end of optical window (15), the upper end of optical window (15) is connected with vacuum press filter (23), laser instrument (17) and receiver (16) place the both sides of optical window (15), and the output of receiver (16) is connected with computing machine (20).

2, size distribution real-time online measuring device after the blast furnace gas mud eddy flow according to claim 1 dezincify, it is characterized in that, described measuring section is the glass optical window that an inner channel is 6mm * 6mm, the long 15cm of optical window, setting also is fixed on the platform that is placed on laser particle sizer, shock insulation seat (18) is arranged at the platform bottom, and optical window (15) adopts with pipeline and is flexible coupling (24), and the laser instrument of laser particle sizer (17) is positioned at optical window (15) both sides with receiver (16).