CN201811925U - Microwave-method on-line monitoring device for blast furnace PCI - Google Patents
Microwave-method on-line monitoring device for blast furnace PCI Download PDFInfo
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- CN201811925U CN201811925U CN2010203017425U CN201020301742U CN201811925U CN 201811925 U CN201811925 U CN 201811925U CN 2010203017425 U CN2010203017425 U CN 2010203017425U CN 201020301742 U CN201020301742 U CN 201020301742U CN 201811925 U CN201811925 U CN 201811925U
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Abstract
The utility model relates to a concentration monitoring device for pulverized coal, in particular to a microwave-method on-line monitoring device for blast furnace PCI (Pulverized Coal Injection). The microwave-method on-line monitoring device comprises a housing, wherein a circuit board is fixed inside the housing, the bottom of the circuit board is connected with a microwave source sending/receiving head, the bottom of the housing is fixedly connected with a base, a welding hole is formed at the lower part of the base, the microwave source sending/receiving head is communicated with the welding hole through a microwave detection hole, the base is cylindrical, the welding hole penetrates the base in the radial direction, two plane surfaces are formed on the two corresponding sides through cutting in the radial direction of two openings of the welding hole, and the diameter of the microwave detection hole is 20 mm to 25 mm. The weight of the microwave-method monitoring device can be effectively lightened, a pulverized coal transmission pipeline can be fixedly welded on the base, and the turbulent flow and the vortex flow in the mounting position of a concentration sensor are reduced, thereby obtaining a more actual and reliable measured value.
Description
Technical field
The utility model relates to a kind of coal powder density monitoring device, especially a kind of microwave method pulverized coal injection on-Line Monitor Device.
Background technology
Operation has important role to the coal powder density of grasping each tuyere injection to the blast furnace normal combustion: coal powder density is excessive, then burn insufficient, worsen permeability of stock column, not only wasted fuel but also contaminated environment; Coal powder density is too small or inhomogeneous, can cause in the stove temperature cross low or stove in each side's megadyne temperature degree inconsistent, the time one is long, can make operation of blast furnace not normal.
The most of static charge induction technology that adopts of present domestic coal powder density monitoring device: because the collision and the friction of dust granules and dust granules, dust granules and inner-walls of duct, dust granules and filter core and dust granules and flue gas, to make electric charge on the dust granules band, comprise positive and negative polarity electric charge.In the time of near dust granules passes through sensor probe, inhale principle according to the positive negative of electric charge, sensor probe can induce corresponding positive and negative charge, and the transfer movement of electric charge in probe forms ac current signal.By this electric signal is amplified, calculation process, thereby measure dust concentration.
Adopt the coal powder density monitoring device of static charge induction technology that coal powder density is had certain requirement, low or too high if concentration is crossed, then can cause the signal measured inaccurate, and sensitivity is low.
Microwave method pulverized coal injection concentration on-line monitoring device is monitored coal powder density and stopping state by Doppler's principle.Microwave has characteristics such as need not to contact object can detect, strong interference immunity in addition; The use of microwave can guarantee the material of penetration sensor inside, accurately coal powder density in the measuring channel.The general quadrilateral of base of existing microwave method pulverized coal injection concentration on-line monitoring device, volume is big, Heavy Weight; The diameter of the connecting hole between microwave sources of law transmission reception head and the welding hole is bigger in addition, therefore the pipeline and the gap between the welding hole of pulverized coal conveying are bigger, cause between pipeline and the base not prison welding solid, cause turbulent flow, the eddy current of concentration sensor installation site, thereby reduce the accuracy of detection of coal dust.
Summary of the invention
The purpose of this utility model is to overcome the above-mentioned defective that existing microwave method pulverized coal injection concentration on-line monitoring device exists, and has proposed its base is carried out improved sensor device.
The utility model is to adopt following technical scheme to realize: a kind of coal powder injection method pulverized coal injection on-Line Monitor Device, comprise shell, the internal fixation of shell has circuit board, the bottom of circuit board connects microwave source and sends the reception head, the fixedly connected base in the bottom of shell, the bottom of base is provided with welding hole, microwave source send to receive between head and the welding hole and is communicated with by the microwave sounding hole, wherein, described base is cylindrical, and welding hole radially runs through in base, and the plane has been cut in the radially corresponding both sides of two opening parts of welding hole, the diameter in microwave sounding hole is 20-25mm, and promptly its slightly larger in diameter sends the size that receives head in microwave source.
In the utility model, by being threaded, also can fix between described base and the shell by bolt or other modes.
When this device uses, at first power transportation pipe is arranged in the welding hole of base, and by welding manner power transportation pipe is fixed on the base, microwave source sends and receives head perpendicular to power transportation pipe, monitors coal powder density in the power transportation pipe by the microwave sounding hole.
The beneficial effects of the utility model are: the cup dolly of employing has alleviated the weight of monitoring device greatly, power transportation pipe can firmly be welded on the base, having reduced concentration sensor is turbulent flow, the eddy current of microwave source emitting and receiving head installation site, makes measured value more true and reliable.
Description of drawings
Fig. 1 is a cut-open view of the present utility model;
Fig. 2 is a upward view of the present utility model.
Embodiment
As shown in Figure 1, microwave method pulverized coal injection concentration on-line monitoring device comprises shell 3, signal picker and base 10.Wherein shell 3 is a stainless-steel pipe, its upper end is connected with loam cake 2 by thread connecting mode, and the upper surface middle part of loam cake 2 is provided with locking wire connection jaws 1, and it is used for fixing the connection lead, the lower end of shell 3 is fixedly connected with base 10, is connected by engage thread between base 10 and the shell 3.Signal picker is installed in the shell 3, comprises microwave source emitting and receiving head 12 and electronic component, and electronic component is welded on the circuit board 5, and circuit board 5 is provided with circuit board fixed support 4, and fixed support 4 is fixedlyed connected with shell 3 by screw 6.Microwave source emitting and receiving head 12 is fixed on the lower end of circuit board.Microwave source emitting and receiving head 12 is installed perpendicular to base 10, with microwave source emitting and receiving head 12 and media isolated, forms non-cpntact measurement by ceramic seal gasket 11, prevents coal dust wearing and tearing microwave source emitting and receiving head.Base 10 is cylindrical, radially is penetrated with welding hole 8 along it in the base 10, and welding hole 8 is used to place power transportation pipe.Between welding hole 8 and the microwave source emitting and receiving head 12 microwave sounding hole 7 is set, microwave source emitting and receiving head 12 is by the coal powder density in the 7 monitoring power transportation pipes of microwave sounding hole.Microwave sounding hole 7 is perpendicular to welding hole 8, and the diameter in microwave sounding hole 7 is 20-25mm, guarantee that its diameter equals or be slightly larger than the size of microwave microwave source emitting and receiving head 12.As shown in Figure 2, plane 9 has all been cut in the radially corresponding both sides of 8 liang of opening parts of welding hole, so that the welding of power transportation pipe.
Microwave method pulverized coal injection concentration on-line monitoring device can detect coal powder density and two measurement parameters of coal dust speed simultaneously.
Microwave by microwave source Wb produces transmits and receives through the microwave source emitting and receiving head.Microwave is in transmitting and receiving process, by the coal dust loss; Coal powder density is high more, and lossy microwave is big more, and the loss and the coal powder density of microwave are proportional.By gathering launched microwave and receiving the poor of microwave, can obtain lossy microwave, thereby learn coal powder density.The coal powder density size is just known air output by coal dust amount and two factor decisions of air output by detecting wind speed.
Measuring wind speed adopts " microwave is multispectral to be reined in " principle, the microwave frequency of emission and run into the extent of the microwave frequency that moving object returns and the proportional relation of distance of moving object and microwave emitting head.Distance is near more, and microwave frequency is high more; Distance is far away more, and microwave frequency is low more.By gathering doppler frequency, just know the coal dust flow velocity, compensated the influence of wind speed automatically to coal powder density.Behind the coal powder density and two signal operations of coal dust speed measured, output AC0.4V AC signal.After processing and amplifying, output dc voltage signal DC4V.By voltage current adapter output analog current signal 4-20mA, advance industrial computer or panel computer by the PLC/DCS computing machine or through RS232, RS485 data communication interface then, show coal powder injection concentration.
Claims (2)
1. microwave method pulverized coal injection on-Line Monitor Device, comprise shell, the internal fixation of shell has circuit board, the bottom of circuit board connects microwave source and sends the reception head, the fixedly connected base in the bottom of shell, the bottom of base is provided with welding hole, microwave source send to receive between head and the welding hole and is communicated with by the microwave sounding hole, it is characterized in that: described base is cylindrical, welding hole is radially in base, the plane has been cut in the radially corresponding both sides of two opening parts of welding hole, and the diameter in microwave sounding hole is 20-25mm.
2. microwave method pulverized coal injection on-Line Monitor Device according to claim 1 is characterized in that: between described base and the shell by being threaded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010203017425U CN201811925U (en) | 2010-01-28 | 2010-01-28 | Microwave-method on-line monitoring device for blast furnace PCI |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010203017425U CN201811925U (en) | 2010-01-28 | 2010-01-28 | Microwave-method on-line monitoring device for blast furnace PCI |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201811925U true CN201811925U (en) | 2011-04-27 |
Family
ID=43894867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010203017425U Expired - Fee Related CN201811925U (en) | 2010-01-28 | 2010-01-28 | Microwave-method on-line monitoring device for blast furnace PCI |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201811925U (en) |
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2010
- 2010-01-28 CN CN2010203017425U patent/CN201811925U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20160128 |
|
| EXPY | Termination of patent right or utility model |