CN104654342A - Coal blending combustion anti-blocking device and coal blending combustion method - Google Patents
Coal blending combustion anti-blocking device and coal blending combustion method Download PDFInfo
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- CN104654342A CN104654342A CN201510045286.XA CN201510045286A CN104654342A CN 104654342 A CN104654342 A CN 104654342A CN 201510045286 A CN201510045286 A CN 201510045286A CN 104654342 A CN104654342 A CN 104654342A
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Abstract
The invention relates to a coal blending combustion anti-blocking device and a coal blending combustion method. The coal blending combustion method is characterized in that (1) broken coal or coal slime after purification and drying pretreatment is sent to a conveying belt, so as to enter a coal bunker together with raw coal, and form blended coal; (2) the blended coal in the coal bunker falls on a bearing chassis after passing through a pressure relief cone, and an unloading arm is driven to slowly rotate by a driving device, so as to forcibly scrape bottom coal to a central discharge port; (3) the blended coal is connected with other equipment through a blanking pipe with a small upper part and a large lower part from the discharge port or is sent to a boiler through the inclined blanking pipe; when the blended coal in the blanking pipe is in a high level of materials, the speed of an upper unloader is reduced, and simultaneously, the pipe wall of the blanking pipe is stricken by a hammer, so as to remove the coal which is bonded in the blanking pipe; (4) in the process that the coal is normally conveyed, when coal interruption is detected by a detection device, high-pressure water columns are emitted by an anti-blocking nozzle, so as to unblock the coal bunker and the inclined blanking pipe. According to the coal blending combustion anti-blocking device and the coal blending combustion method, the raw coal and the coal slime or other kinds of coal can be smoothly, orderly and quantitatively conveyed to a coal feeder or the boiler after being blended.
Description
Technical field
The present invention relates to a kind of coal mixing combustion anti-block apparatus and coal mixing combustion method, belong to Thermal Power Enterprises coal handling system equipment technical field.
Background technology
Coal in China output leaps to the first in the world, and the depth & wideth of Coal dressing is all in fast development, and various ature of coal is complicated and changeable, especially coal slime, and the output of coal slime rises year by year, and the comprehensive utilization of coal slime has become problem in the urgent need to address.Due to a kind of emission that coal slime is in coal washing process, wherein contained particle very thin (usually all at below 0.5mm), overall proterties is high-moisture (water content is between 25% ~ 40%), high viscosity, high retentiveness, high ash content, simultaneously because coal slime is as discarded object in coal washery, colliery, foreign material in coal slime are more, comprise stone, metalwork.Just because of there is many unfavorable conditions, coal slime is difficult to realize large-scale commercial Application, is kept outside of the door in very long-term by power consumer, sells for main outlet with civilian.Along with the continuous innovation of technology improves, domestic all conglomeraties, comprise power industry all in the maximum gain attempting and explore coal slime utilization, therefore, and the coal mixing combustion Cheng Liao designing institute of boiler and an important topic of power plant's research of technique.Current domestic a lot of electricity power enterprise all have employed various scheme and attempts, there is failure, have technology jejune, certainly also to have different proportion mix and burn successfully, as long as it should be noted that and carry out coal mixing combustion, more or less all achieve certain economic benefit.So that can affirm says that coal mixing combustion is have very high economic worth in the application of Thermal Power Generation Industry, and add and turn waste into wealth, be beneficial to the advantages such as environmental protection, this technique has very far reaching significance.
Current coal slime mixes burning two kinds of typical techniques, one is that coal slime adopts independent pipeline, that directly enters boiler mixes firing method, but require very high to the impurity of coal slime, strict to the moisture control of coal slime, and the complexity etc. of conveyance conduit equipment, cause the operation expense of the huge and great number of cost of investment, although mix burning rate can reach about 50% at present, its comprehensive economic benefit is general, and system run all right is not good.Another kind mixes in raw coal by coal slime; boiler is entered by normal coal supply channel; but this scheme is subject to the puzzlement of sticky bridging; the burning of mixing of small scale just causes serious coal breakage not smooth; dredging cost is high, and even by forced-stopping machine, economic loss is serious; although therefore this technique uses the earliest, come to a halt.Along with the development of constantly bringing forth new ideas of coal supply technology and auxiliary equipment, there is much equipment targetedly in market, can solve the problems such as stifled, sticky, knot, the technical characterstic of these equipment comprehensive, allow coal slime mix burning and again shifted the forward position of technology onto, as long as can solve the problem of feed blocking smoothly, coal slime mixes burning will with minimum cost, stable operating mode is taken the course of its own in industry, so raw coal directly mix burn coal slime (comprising many combustion of mixed coals) technique will the progress of making a breakthrough property.The problem solving the conveying of worst coal slime and use, the use for other coals will be handy especially.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of coal mixing combustion anti-block apparatus and coal mixing combustion method are provided, smooth and easy after can realizing raw coal and coal slime or other coal Homogeneous phase mixing, be quantitatively in order transported to feeder or boiler, for coal mixing combustion provides basic condition, complete the committed step of coal mixing combustion technique.
According to technical scheme provided by the invention, a kind of coal mixing combustion anti-block apparatus, feature is: comprise coal bunker and water cannon blockage-clearing device, the bottom of coal bunker connects bearing chassis, discharging opening is provided with in the middle of bearing chassis, discharge outlet is provided with material blanking tube, material blanking tube by feeder or scrapper conveyor be connected, the discharging opening of feeder or scrapper conveyor connects inclination material blanking tube; Install decompression cone in described coal bunker inside, decompression cone is erected at the inside center of coal bunker, and decompression cone is hollow structure, and upward, install unloading arm between the bottom of decompression cone and bearing chassis, unloading arm is connected with the power output shaft of drive unit the vertex of a cone of decompression cone; Described water cannon blockage-clearing device comprises water-storing device, water-storing device delivery port arranges filter, the delivery port of water-storing device connects one end of high-pressure pump by pipeline, the other end of high-pressure pump connects anti-blocking sprayer by pressure duct, and anti-blocking sprayer is arranged on the perisporium of coal bunker and the tube wall of inclination material blanking tube; At described material blanking tube disposed outside pneumatic hammer.
Further, described pneumatic hammer comprises mounting bracket, and mounting bracket installs cylinder, and the piston rod of cylinder connects tup.
Further, the region described material blanking tube contacted with tup arranges protective device.
Further, described material blanking tube presents little lower macrostructure.
Further, bottom described coal bunker be semicircle or arc.
Described coal mixing combustion method, is characterized in that, comprise the following steps:
(1) by the coal of fragmentation or through removal of impurities, dry the coal slime of pre-treatment and evenly deliver to conveyer belt enter coal bunker together with raw coal, form Mixture Density Networks, the largest particles of Mixture Density Networks is not more than 100mm, and the moisture content of Mixture Density Networks is not higher than 20%;
(2) Mixture Density Networks in coal bunker drops in bearing chassis after decompression cone, and drive unit drives unloading arm to turn round action at a slow speed, and the rotating speed of unloading arm is 0.3-3 rev/min, forces scraping underseam to center discharging opening;
(3) Mixture Density Networks to be connected with other equipment through up-small and down-big material blanking tube by discharging opening or through inclination material blanking tube, finally to deliver to boiler; When the Mixture Density Networks in material blanking tube is in high charge level, the while that top unloader slowing down, tup clashes into the tube wall of material blanking tube, to remove the coal charge of material blanking tube internal bond; Described high charge level refers to that Mixture Density Networks exceedes 80% of material blanking tube volume, and pneumatic hammer adopts the compressed air of 0.4 ~ 0.8MPa, and the impulsive force of hammer head is 1000kg, and air consumption is not more than 0.0015 m3;
(4) coal charge normally carry in checkout gear when disconnected coal being detected, anti-blocking sprayer launches water jets under high pressure, and carry out block clearing to coal bunker and inclination material blanking tube, the pressure of water jets under high pressure is 0.8-1.6MPa, effective range 0-15m.
The present invention has the following advantages: (1) utilizes effectively anti-blocking, the anti-stifled measures such as power coal supply, guarantees that coal handling system is without blocking, for coal mixing combustion provides basis; (2) utilize and do not destroy original coal delivering member system, carrying out the conveying of high viscosity ature of coal, the cost of coal mixing combustion is dropped to minimum; (3) coal slime can carry out pretreatment, to meet the use of various boiler and auxiliary device, mix burn wider, the scope of use is also more extensive; (4) realize coal mixing combustion, utilize coal inferior, coal slime etc., the call of response national energy-saving environmental protection, enjoys the preferential policies such as state tax revenue, turns waste into wealth, a joint wound effect.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of water cannon blockage-clearing device.
Fig. 3 is the structural representation of block clearing pneumatic hammer.
Detailed description of the invention
Below in conjunction with concrete accompanying drawing, the invention will be further described.
As shown in FIG. 1 to 3: described coal mixing combustion anti-block apparatus comprises coal bunker 1, decompression cone 2, drive unit 3, unloading arm 4, bearing chassis 5, material blanking tube 6, water cannon blockage-clearing device 7, water-storing device 7-1, filter 7-2, high-pressure pump 7-3, anti-blocking sprayer 7-4, pressure duct 7-5, pneumatic hammer 8, cylinder 8-1, tup 8-2, mounting bracket 8-3, protective device 8-4 etc.
As shown in Figure 1, the present invention includes coal bunker 1, the bottom of coal bunker 1 connects bearing chassis 5, and be provided with discharging opening in the middle part of bearing chassis 5, discharge outlet is provided with material blanking tube 6; Install decompression cone 2 in described coal bunker 1 inside, decompression cone 2 is erected at the inside center of coal bunker 1, and decompression cone 2 is hollow structure, and upward, drive unit 3 is installed in the bottom of decompression cone 2 to the vertex of a cone of decompression cone 2, the power output shaft of drive unit 3 is installed unloading arm 4; Described unloading arm 4 is driven by drive unit 3 and turns round, and forces center coal being scraped equably bearing chassis 5, discharge coal bunker 1 by blanking port when unloading arm 4 turns round; Described coal bunker 1 is connected with other equipment (as feeder, scrapper conveyor or belt feeder) by material blanking tube 6, and the discharging opening of feeder or scrapper conveyor connects inclination material blanking tube 9;
As shown in Figure 1, described material blanking tube 6 presents little lower macrostructure, without blocking sequelae; For preventing the coal bunker 1 inner pressure relief position of boring above in the of 2 from occurring the blocking of knot arch, water cannon blockage-clearing device 7 being installed, utilizing the long-range impact energy of water under high pressure to remove blocking; As shown in Figure 2, described water cannon blockage-clearing device 7 comprises water-storing device 7-1, water-storing device 7-1 delivery port arranges filter 7-2, the delivery port of water-storing device 7-1 connects one end of high-pressure pump 7-3 by pipeline, the other end of high-pressure pump 7-3 connects anti-blocking sprayer 7-4 by pressure duct 7-5, and anti-blocking sprayer 7-4 is arranged in the perisporium of coal bunker 1 and inclination material blanking tube 9; It is for subsequent use that water source enters water-storing device 7-1 after initial filter, after starting water-storing device 7-1, high-pressure pump 7-3 from water-storing device 7-1 after filtration device 7-2 absorb water, each anti-blocking sprayer 7-4 is sent to by pressure duct 7-5 after supercharging, the spout of anti-blocking sprayer 7-4 aims at knot arch material, and water jets under high pressure direct effect removes blocking; In addition, in the material blanking tube that coal supply goes out etc., anti-blocking sprayer can be arranged equally, prevent the blockage problem in this region;
For preventing sticky coal from sticky wall or extruding blocking occurring in material blanking tube 6, at material blanking tube 6 outer layout pneumatic hammer 8, utilizing compressed air to promote tup and hammering action is done to material blanking tube 6 tube wall, easily removing blocking; As shown in Figure 3, described pneumatic hammer 8 comprises mounting bracket 8-3, and mounting bracket 8-3 installs cylinder 8-1, and the piston rod of cylinder 8-1 connects tup 8-2; The region that described material blanking tube 6 contacts with tup 8-2 arranges protective device 8-4, and the stress point of material blanking tube 6 can be protected to be out of shape; Described pneumatic hammer 8 one to by a pair or two to using simultaneously, when receiving jam signal, pneumatic hammer 8 starts, and compressed air enters cylinder 8-1, and cylinder 8-1 promotes at a high speed the protective device 8-4 that tup 8-2 clashes into material blanking tube 6 outer wall, and in vibration blanking pipe 6, material falls;
Be semicircle bottom described coal bunker 1 or arc, avoid with extruding angle; Coal bunker 1 is if any closing in, and its inclination angle is not more than 20 °.Described bearing chassis 5, for strengthening structure, can bear the weight of whole storehouse coal; Coal bunker 1 inner surface that is inner and bearing chassis 5 does stainless steel and pastes or abrasionproof process, and fineness Ra is not more than 3.2.
The course of work of the present invention and operation principle are: coal slime carries out suitable pre-treatment as required, as removal of impurities, oven dry etc. (meet moisture content not higher than 20% requirement), then evenly deliver to conveyer belt and enter coal bunker 1 together with raw coal, in dropping process, coal slime and raw coal mix further, Mixture Density Networks drops in bearing chassis 5 after decompression cone 2, drive unit 3 drives unloading arm 4 to turn round action at a slow speed, force scraping underseam to center discharging opening, discharging opening adopts up-small and down-big material blanking tube 6 be connected with other equipment or enter elephant trunk, finally delivers to boiler.For preventing the position of top in coal bunker 1 from occurring the blocking of knot arch, arranging anti-blocking sprayer 7-4 at coal bunker 1 perisporium, utilizing the long-range impact energy of water under high pressure to remove blocking; For preventing sticky coal from sticky wall or extruding blocking occurring in material blanking tube 6, arranging pneumatic hammer 8 material blanking tube 6 is outer, utilizing compressed air to promote to hang one's head and make hammering action to tube wall, easily removing blocking.Feeder or belt feeder outlet material blanking tube outer wall also can arrange anti-blocking sprayer 7-4, block clearing while increasing lubricity by few press water.Apparatus control system directly receives Power Plant DCS, and automaticity is high, and application converter technique controls discharging speed, and by the automatic start-stop of each block clearing equipment of PLC logic control, guarantees the coal slime of high viscosity and raw coal mixture is smooth and easy is transported to boiler.
Described coal mixing combustion method, specifically comprises the following steps:
(1) by the coal of fragmentation or through removal of impurities, dry the coal slime of pre-treatment and evenly deliver to conveyer belt enter coal bunker 1 together with raw coal, form Mixture Density Networks, the largest particles of Mixture Density Networks is not more than 100mm, and the moisture content of Mixture Density Networks is not higher than 20%;
(2) Mixture Density Networks in coal bunker 1 drops in bearing chassis 5 after decompression cone 2, and drive unit 3 drives unloading arm 4 to turn round action at a slow speed, and the rotating speed of unloading arm 4 is 0.3-3 rev/min, forces scraping underseam to center discharging opening;
(3) Mixture Density Networks to be connected with other equipment through up-small and down-big material blanking tube 6 by discharging opening or through inclination material blanking tube 9, finally to deliver to boiler; When the Mixture Density Networks in material blanking tube 6 is in high charge level, the while that top unloader slowing down, tup 8-2 clashes into the tube wall of material blanking tube 6, to remove the coal charge of material blanking tube 6 internal bond; Described high charge level refers to that Mixture Density Networks exceedes 80% of material blanking tube volume, and pneumatic hammer 8 adopts the compressed air of 0.4 ~ 0.8MPa, and the impulsive force of hammer head 8-2 is 1000kg, and air consumption is not more than 0.0015 m3;
(4) coal charge normally carry in checkout gear when disconnected coal being detected, anti-blocking sprayer 7-4 launches water jets under high pressure, carries out block clearing to coal bunker 1 and inclination material blanking tube 9, and the pressure of water jets under high pressure is 0.8-1.6MPa, effective range 0-15m.
Present system is simple and clear, reasonable, stable, equipment effectively utilizes former defeated coal delivery system, occupy little space, equipment is simple, invest minimum, not only meet the optimal transport scheme of run coal bin first in first out, quantitatively conveying, meet the requirement of high viscosity ature of coal conveying simultaneously, the requirement of coal mixing combustion and each ature of coal blending transportation can be realized easily.The present invention is to solve caking coal blocking induction system for starting point, use the anti-blocking anti-plug equipment of current advanced person cleverly, reach the requirement of the various ature of coal of smooth delivery of power, for power industry large-scale promotion coal mixing combustion lays the foundation, not only in resource, environmental protection, in each side such as economy, benefit etc., there is very far-reaching influence especially.
Claims (6)
1. a coal mixing combustion anti-block apparatus, it is characterized in that: comprise coal bunker (1) and water cannon blockage-clearing device (7), the bottom of coal bunker (1) connects bearing chassis (5), discharging opening is provided with in the middle of bearing chassis (5), discharge outlet is provided with material blanking tube (6), material blanking tube (6) by feeder or scrapper conveyor be connected, the discharging opening of feeder or scrapper conveyor connects inclination material blanking tube (9); In described coal bunker (1) inside, decompression cone (2) is installed, decompression cone (2) is erected at the inside center of coal bunker (1), decompression cone (2) is hollow structure, the vertex of a cone of decompression cone (2) upward, install unloading arm (4) between the bottom of decompression cone (2) and bearing chassis (5), unloading arm (4) is connected with the power output shaft of drive unit (3); Described water cannon blockage-clearing device (7) comprises water-storing device (7-1), water-storing device (7-1) delivery port arranges filter (7-2), the delivery port of water-storing device (7-1) connects one end of high-pressure pump (7-3) by pipeline, the other end of high-pressure pump (7-3) connects anti-blocking sprayer (7-4) by pressure duct (7-5), and anti-blocking sprayer (7-4) is arranged on the perisporium of coal bunker (1) and the tube wall of inclination material blanking tube (9); At described material blanking tube (6) disposed outside pneumatic hammer (8).
2. coal mixing combustion anti-block apparatus as claimed in claim 1, is characterized in that: described pneumatic hammer (8) comprises mounting bracket (8-3), mounting bracket (8-3) is installed cylinder (8-1), and the piston rod of cylinder (8-1) connects tup (8-2).
3. coal mixing combustion anti-block apparatus as claimed in claim 2, is characterized in that: arrange protective device (8-4) in the upper region contacted with tup (8-2) of described material blanking tube (6).
4. coal mixing combustion anti-block apparatus as claimed in claim 1, is characterized in that: described material blanking tube (6) presents little lower macrostructure.
5. coal mixing combustion anti-block apparatus as claimed in claim 1, is characterized in that: described coal bunker (1) bottom is semicircle or arc.
6. a coal mixing combustion method, is characterized in that, comprises the following steps:
(1) by the coal of fragmentation or through removal of impurities, dry the coal slime of pre-treatment and evenly deliver to conveyer belt enter coal bunker (1) together with raw coal, form Mixture Density Networks, the largest particles of Mixture Density Networks is not more than 100mm, and the moisture content of Mixture Density Networks is not higher than 20%;
(2) Mixture Density Networks in coal bunker (1) drops in bearing chassis (5) after decompression cone (2), drive unit (3) drives unloading arm (4) to turn round action at a slow speed, the rotating speed of unloading arm (4) is 0.3-3 rev/min, forces scraping underseam to center discharging opening;
(3) Mixture Density Networks to be connected with other equipment through up-small and down-big material blanking tube (6) by discharging opening or through inclination material blanking tube (9), finally to deliver to boiler; When the Mixture Density Networks in material blanking tube (6) is in high charge level, the while that top unloader slowing down, tup (8-2) clashes into the tube wall of material blanking tube (6), to remove the coal charge of material blanking tube (6) internal bond; Described high charge level refers to that Mixture Density Networks exceedes 80% of material blanking tube volume, and pneumatic hammer (8) adopts the compressed air of 0.4 ~ 0.8MPa, and the impulsive force of hammer head (8-2) is 1000kg, and air consumption is not more than 0.0015 m3;
(4) coal charge normally carry in checkout gear when disconnected coal being detected, anti-blocking sprayer (7-4) launches water jets under high pressure, carries out block clearing to coal bunker (1) and inclination material blanking tube (9), and the pressure of water jets under high pressure is 0.8-1.6MPa.
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| CN201510045286.XA CN104654342B (en) | 2015-01-28 | 2015-01-28 | Coal mixing combustion anti-block apparatus and coal mixing combustion method |
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| CN201510045286.XA CN104654342B (en) | 2015-01-28 | 2015-01-28 | Coal mixing combustion anti-block apparatus and coal mixing combustion method |
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| CN104654342B (en) | 2018-01-23 |
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