CN1032855A - Water-cooling electromagnet-vibrating firegrate - Google Patents
Water-cooling electromagnet-vibrating firegrate Download PDFInfo
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- CN1032855A CN1032855A CN 87107163 CN87107163A CN1032855A CN 1032855 A CN1032855 A CN 1032855A CN 87107163 CN87107163 CN 87107163 CN 87107163 A CN87107163 A CN 87107163A CN 1032855 A CN1032855 A CN 1032855A
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- electromagnet
- coal
- grate
- vibrating
- firegrate
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Abstract
The present invention relates to that a kind of what be used for coal-burning boiler and industrial furnace directly is the water-cooling electromagnet-vibrating firegrate of vibration power source with the electromagnet.
Upper frame and fin panel casing grate surface and several groups of plate shape springs of being fixed on the upper frame are formed an elastic oscillating system.The cyclically-varying magnetic force that electromagnet produced makes the fin panel casing grate surface produce resonance by thrust plate.The fire coal of being fallen on the grate surface by chute moves and finishes combustion process to back of furnace row gradually under the effect of vibration force.Moving speed of coal layer can be controlled by the size of electric current in the electromagnet coil.Owing to adopted resonance principle, made the energy consumption of fire grate reduce to minimum degree.
Description
The present invention relates to that a kind of what be used for coal-burning boiler and industrial furnace directly is the water-cooling electromagnet-vibrating firegrate of vibration power source with the electromagnet.
Existing water-cooled vibrating-grate stoker all is that the centrifugal force that produced with a pair of rotating eccentricity piece of motor drives is as the vibration power source, make grate surface produce vibration, thus complex structure, the size of exciting force, the Oscillation Amplitude of fire grate, coal-fired transporting velocity all can not be adjusted as required at any time.Because dragging motor all is asynchronous machine, be subjected to voltage height, payload to influence rotation speed change bigger, thereby the frequency of exciting force is very unstable, is difficult to make fire grate to be operated in resonance state, causes power consumption big, efficient is low, job insecurity.In the Fraquent start process of fire grate interruption work, motor speed accelerates to rated speed from zero, excited frequency also changes to operating frequency from zero, is difficult to during this period avoid overlap with the intrinsic frequency of boiler or building and produce instantaneous resonance, causes certain destruction.Existing water-cooled vibrating-grate stoker 2 millimeters to 4 millimeters large amplitude and the modes of being interrupted work of adopting more, cause the coal bed ventilation change in resistance bigger easily, malleation and serious flying dust appear in the burner hearth, though can take the fire grate vibration to be improved with the ventilation work of hocketing, controlling organization complexity, cost are big, inconvenient maintenance.And the air outlet of fire grate is vertical vertical masonry joint, and the air outlet direction is vertical with grate surface, leaks coal consumption in the work and decreases bigger.
Purpose of the present invention is exactly in order to provide a kind of simple in structure, and energy consumption is low, be convenient to regulate, can reduce leakage coal and flying dust, be difficult for scaling loss, be convenient to keep in repair, the novel vibrating fire grate of working stability.
The present invention finishes as follows: form fire-grating seat with the inclination upper frame that level forms an angle with base and one group of plate shape spring.Plate shape both ends of the spring is fixedlyed connected with pressing plate with base with upper frame respectively.The fin panel casing that has laterally oblique air outlet is fixed on the upper frame as grate surface.Device one electromagnet between upper frame and the base.The intrinsic frequency of the vibrational system that plate shape groups of springs and upper frame, fin panel casing grate surface are formed equals the change of magnetic field strength frequency of electromagnet.When electromagnet coil feeds the periodically variable electric current of current strength, the iron core of electromagnet will produce periodically variable magnetic attraction armature, make upper frame and fin panel casing grate surface produce resonance.Be present in the effect that fire coal on the grate surface is subjected to vibration force, just produce continuous rearward little jumping campaign, coal-firedly move to afterbody gradually and fall into the purpose of pit from the fire grate head thereby reach to make.The power of fire grate vibration has determined the size of coal-fired translational speed, and the power of fire grate vibration can be easily with carrying out sensitivity control by the size of electric current in the electromagnet coil.Because the ratio that the vibration frequency of water-cooling electromagnet-vibrating firegrate is selected is higher, so very little Oscillation Amplitude (0.1～0.5 millimeter) can satisfy coal-fired requirement to translational speed.Under little amplitude continuous duty, coal-fired shatter value also remains unchanged substantially, so can make the flowing resistance in coal seam keep stable, avoids occurring in the burner hearth malleation, and the flying dust and the leakage coal that produce because of vibration also can descend significantly.Air outlet lateral arrangement on the fin panel casing grate surface and air outlet direction and grate surface tilt, and have further reduced to leak the chance of coal.Because electromagnet-vibrating firegrate is operated in resonance state, its exciting power can drop to bottom line, so energy consumption is less.Because the fire coal on the water-cooling electromagnet-vibrating firegrate is little jumping state, both be different from that fire coal remains static on the traveling-grate stoker, be different from strong movements state coal-fired on the mechanical oscillation fire grate again, so water-cooling electromagnet-vibrating firegrate has certain poking fire and broken burnt ability, not only the bigger inflammable coal of incendivity fugitive constituent is gone back less nonflammable coal of incendivity fugitive constituent and the lower coal of ash fusion point.Can avoid burning as part, static coal seam on the traveling-grate stoker, produce " burner " phenomenon, flying dust, leakage coal, the burner hearth that can alleviate again as mechanical vibrating-grate stoker emit problems such as malleation.Because the fin panel casing grate surface of water-cooling electromagnet-vibrating firegrate adopts seamless steel pipe to form, pipe is interior by cooling water, so avoided the scaling loss of grate surface.No-rotary part in the structure of whole water-cooling electromagnet-vibrating firegrate, thereby do not have the machinery wearing and tearing, be convenient to maintenance and maintenance.Because the grate surface Oscillation Amplitude is very little, each wind chamber sealing more easily solves, the string wind problem between the fine elimination air compartment of energy.Excitation power of the present invention can be supplied with after SCR control by the alternating current of electrical network, because the frequency of grid alternating current is more stable, thereby can guarantee that the normal phase steady operation of fire grate is in resonance state.The chance that fixing excited frequency can minimizing coincides with the intrinsic frequency of boiler and building has been avoided the covibration that is harmful to.
The present invention is described in further detail below with reference to accompanying drawing:
Accompanying drawing 1 is a front view of the present invention.
Accompanying drawing 2 is vertical views of the present invention.
Accompanying drawing 3 is A-A cutaway views of the present invention.
Accompanying drawing 4 is B of the present invention portion enlarged drawings.
Accompanying drawing 5 is electric control theory figure of the present invention.
Fin panel casing grate surface of the present invention is made up of fire grate segment (15), steel pipe (16) rear set box (17) and preceding collection case (18), air outlet (7) is formed by the edge of two fire grate segments (15), and the angle between air outlet direction and the grate surface is provided with box-shaped water-cooled sidewall (23) and anti-clinker block (24) less than 90 ° of both sides at grate surface.Head device at grate surface has chute (6).The middle part of preceding collection case (18) is welded with dividing plate, and water inlet (13) and delivery port (14) are equipped with in two ends.The fin panel casing grate surface is fixed on the upper frame (9).The two ends of plate shape spring (10) are fixed together with upper frame (9) and base (1) respectively with pressing plate (22).Several groups of flat springs (10) constitute an elastic oscillating system jointly with upper frame (9) and by the fin panel casing grate surface that fire grate segment (15), steel pipe (16), rear set box (17) and preceding collection case (18) are formed, and its eigentone equals the change frequency of electromagnet magnetic field intensity.The electromagnet of forming with iron core (3), armature (4) and coil (5) is as the vibration power source of water-cooling electromagnet-vibrating firegrate.Iron core (3) and armature (4) are separately fixed on support (2) and the thrust plate (8), maintain 2 to 3 mm clearance between the working surface of iron core (3) and armature (4).Be furnished with in the both sides of base (1) and have air inlet (12) on side plate (19) side plate (19).Slit between air compartment baffle (11) and the side plate (19) seals by rubber slab (21) and press strip (20).After the periodically variable electric current of intensity feeds electromagnet coil (5), iron core (3) is produced the magnetic attraction armature (4) of same frequency by cyclic magnetization, armature (4) makes upper frame (9) and fin panel casing grate surface produce resonance by thrust plate (8).Coal in the coal bunker drops on the grate surface by chute (6), the vibration force effect that is subjected to grate surface produces rearward continuous little jumping campaign, and move to back of furnace row gradually, finish pre-burning at the same time and enter combustion phases, the air of keeping burning enters each air compartment by several air inlets (12), enters the coal seam by air outlet (7) again and carries out combustion-supporting.The coal of after-flame falls into pit by back of furnace row.According to the load variations of boiler and the requirement of burning, by the size of electric current in the controllable silicon adjustment electromagnet coil (5), can change the Oscillation Amplitude of grate surface, thereby change the translational speed in coal seam.Utilize water inlet (13) and delivery port (14) that the fin panel casing grate surface is inserted in the boiler water cycle system, make fire grate in whole courses of work, remain cooling water and pass through, avoided fire grate segment (15) and seamless steel pipe (16) scaling loss.Producing the periodically variable electric current of electromagnet magnetic force is provided after controllable silicon (27) control by alternating current.The big I of electric current is adjusted by the variable resistor (25) in the trigger (26), to reach the purpose that changes the fire grate Oscillation Amplitude.
Claims (2)
1, a kind of water-cooling electromagnet-vibrating firegrate that is used for coal-burning boiler and industrial furnace is characterized in that the electromagnet formed with iron core [3], armature [4] and coil [5] the vibration power source as water-cooling electromagnet-vibrating firegrate.Iron core [3] and armature [4] are separately fixed on support [2] and the thrust plate [8], maintain 2 to 3 mm clearance between the working surface of iron core [3] and armature [4].
2, the described water-cooling electromagnet-vibrating firegrate of claim 1 is characterized in that the direction of air outlet on the fin panel casing grate surface (7) and the angle between the grate surface are less than 90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87107163 CN1032855A (en) | 1987-10-25 | 1987-10-25 | Water-cooling electromagnet-vibrating firegrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 87107163 CN1032855A (en) | 1987-10-25 | 1987-10-25 | Water-cooling electromagnet-vibrating firegrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1032855A true CN1032855A (en) | 1989-05-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 87107163 Pending CN1032855A (en) | 1987-10-25 | 1987-10-25 | Water-cooling electromagnet-vibrating firegrate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1032855A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011017833A1 (en) * | 2009-08-10 | 2011-02-17 | 东南大学 | Water-cooled vibration fire grate with two-way non-uniform matching air distribution of biomass direct combustion boiler |
| CN105744665A (en) * | 2016-03-28 | 2016-07-06 | 钱月珍 | Vibration type induction cooker |
| CN114135883A (en) * | 2021-12-08 | 2022-03-04 | 江苏大学 | Rotary grate capable of vibrating and boiler |
-
1987
- 1987-10-25 CN CN 87107163 patent/CN1032855A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011017833A1 (en) * | 2009-08-10 | 2011-02-17 | 东南大学 | Water-cooled vibration fire grate with two-way non-uniform matching air distribution of biomass direct combustion boiler |
| CN105744665A (en) * | 2016-03-28 | 2016-07-06 | 钱月珍 | Vibration type induction cooker |
| CN105744665B (en) * | 2016-03-28 | 2019-01-25 | 邢昱 | Oscillatory type electromagnetic oven |
| CN114135883A (en) * | 2021-12-08 | 2022-03-04 | 江苏大学 | Rotary grate capable of vibrating and boiler |
| CN114135883B (en) * | 2021-12-08 | 2024-04-12 | 江苏大学 | Vibrating rotary grate and boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |