CN103708231A - Anti-blocking method and device for pebble coal vacuum transport system - Google Patents
Anti-blocking method and device for pebble coal vacuum transport system Download PDFInfo
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- CN103708231A CN103708231A CN201310719997.1A CN201310719997A CN103708231A CN 103708231 A CN103708231 A CN 103708231A CN 201310719997 A CN201310719997 A CN 201310719997A CN 103708231 A CN103708231 A CN 103708231A
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Abstract
The invention relates to the electric system pebble coal processing field, in particular to a method and device for preventing pipelines from being blocked through a vacuum air pebble coal conveying system. According to the method and device, pressure sensors detect changes of the vacuum degree in a conveying pipeline and judge pebble coal accumulation positions, and accumulated pebble coal is made to be loose through the mechanical vibration of vibration motors, so that subsequent pebble coal particles are prevented from being further accumulated to cause pipeline blocking. The device comprises elastic pup joints, the vibration motors, the pressure sensors and a control system. The pebble coal conveying pipeline is connected with a spiral conveyor under a coal mill and a dust removing device through the elastic pup joints. The vibration motors are arranged at the two ends of a water conveying pipeline. The pressure sensors are arranged in the middle of the water pipeline and the inlet end of the dust removing device and transmit pressure signals to the control system through signal lines. A control device controls start, stop and the vibration amplitude of the vibration motors according to the changing conditions of the vacuum degree detected by the pressure sensors.
Description
Technical field
The present invention relates to electric system pebble coal process field, be specifically related to a kind of method and apparatus that prevents pipe choking that utilizes vacuum pneumatic to carry pebble coal system.
Background technology
Pebble coal vacuum delivery system is that the negative-pressure air-flow that utilizes roots blower suction channel air to form is transported to dedusting sorting unit by pebble coal, while containing larger particle in pipeline, the kinematic velocity of bulky grain pebble coal is slower, and follow-up pebble coal particle is subject to the obstruction of the slower particle of the place ahead motion and easily gathers obstruction delivery duct.
In existing pebble coal conveying technology; conventional vacuum handling method is that feed pipe is directly connected with disconnector by delivery duct; there is no detection and the processing equipment relevant to pipe choking; after pipe choking, needing shutdown to fall delivery duct disassembles; by manual type, carry out pipeline pass blocking; not only working strength is large, and impact is produced." pebble coal positive pressure pneumatic carrying method and feedway " (Chinese Patent Application No.: 201210501408.8 that Pan Renhu etc. propose, date of application: the method that 2012.11.29) adopts treatment by stages, be about to pebble coal conveying and be divided into 5 stages such as charging stage, intake phase, delivery phase, bulky grain purge stages, loitering phase, intake phase: close block clearing material valve, unlatching helps purge valve, reaches inflation pressure setting value to delivery duct internal pressure value; Delivery phase: pebble coal is delivered to terminal storehouse by delivery duct; Bulky grain purge stages: control corresponding air inlet valve by timing controller, residual bulky grain pebble coal in delivery duct and conveying storehouse pump is purged to terminal storehouse; Loitering phase: block clearing material valve is in opening, and other valves are all in closed condition.The method will rest on ducted bulky grain by bulky grain purge stages and blow away, and reduce the probability of pipe choking.
No matter pebble coal is carried is to adopt malleation to carry or vacuum handling, pebble coal delivery duct stops up and generally all appears at delivery phase, in pipeline, pebble coal flow is large and while being mingled with bulky grain, tend to produce block up and cause pipe choking, once pipe choking, is difficult to remove bulky grain by purging again and carries out pipeline pass blocking.
Summary of the invention
Goal of the invention: a kind of prevention of pebble coal vacuum delivery system delivery duct obstruction and the method and apparatus of processing are provided, its method is that vibrating motor is installed on delivery duct, and the degree of vacuum of utilizing pressure sensor to detect in pipeline changes, Vibration on Start-up motor when vacuum up, utilize mechanical vibration that the pebble coal gathering is become flexible, and rapid movement enter dust collector under the effect of mechanical vibration and negative-pressure air-flow.
Technical scheme: a kind of pebble coal vacuum delivery system prevents the device that delivery duct stops up, comprise feed arrangement, discharge device, front elasticity short circuit, rear elasticity short circuit, front pressure sensor, rear pressure sensor, front vibrating motor, after vibration motor, and control system, signal wire (SW), it is characterized in that, feed arrangement is connected with front elasticity short circuit, dust collector is connected with rear elasticity short circuit, front elasticity short circuit is connected by delivery duct with rear elasticity short circuit, vibrating motor before being provided with on the close delivery duct of front elasticity short circuit, near on the delivery duct of rear elasticity shorted end, be provided with after vibration motor, pressure sensor before delivery duct middle part is provided with, rear pressure sensor is arranged on dust collector entrance point, front pressure sensor, rear pressure sensor, front vibrating motor, after vibration motor is connected with control system by signal wire (SW).
Described front elasticity short circuit and rear elasticity short circuit form by mozzle, bellows flange, bellows, and a bellows flange is respectively welded at bellows two ends, and mozzle inserts bellows from left side through bellows flange; Front elasticity short circuit has a side of mozzle to be connected with feed pipe, and opposite side is connected with delivery duct; Rear elasticity short circuit has a side of mozzle to be connected in delivery duct down.
Feed arrangement comprises coal mill feed bin, ventilation inlet, conveyor screw, inlet point, feed pipe, and feed pipe one end is provided with ventilation inlet, one end is connected with front elasticity short circuit, and coal mill feed bin is connected by conveyor screw with feed pipe.
Dust collector comprises disconnector, blow-off valve, air inducing pipeline, air outlet, induced draft fan, and disconnector one end is connected with rear elasticity short circuit and air inducing pipeline, and the other end is provided with blow-off valve, and air outlet is connected by induced draft fan with air inducing pipeline.
Above-mentioned pebble coal vacuum delivery system prevents the realization of delivery duct blocking device, utilize front pressure sensor and rear pressure sensor to detect the variation of delivery duct degree of vacuum, the position that in judgement delivery duct, pebble coal gathers, and by control system, control vibrating motor and start and stop and vibration intensity, utilize mechanical vibration that pebble coal accumulation is scattered, pebble coal particle velocity is accelerated in combined action by mechanical vibration and negative-pressure air-flow, avoids further gathering of follow-up pebble coal to cause pipe choking.
Beneficial effect: can effectively prevent that pebble coal from gathering and blocking pipe in pipeline in pebble coal vacuum delivery system anti-block apparatus of the present invention, reduce floor time and pass blocking work capacity, guarantee the reliability service of pebble coal vacuum delivery system.
Accompanying drawing explanation
Fig. 1 pebble coal vacuum delivery system anti-block apparatus constructional drawing
Fig. 2 elasticity short-circuit structure figure
Number in the figure: rear pressure sensor 15 air inducing pipeline 16 disconnector 17 blow-off valve 18 induced draft fan 19 discharge pipe 20 mozzle 21 bellows flange 22 bellowss of the 1 rear elasticity short circuit 14 of the coal mill feed bin 2 ventilation inlet 3 inlet point front elasticity short circuit front vibrating motor 8 control system front pressure sensor 11 delivery duct 12 after vibration motor 13 of 9 signal wire (SW) 10 of 6 conveyor screw 7 of 4 feed pipe 5
The specific embodiment
A kind of pebble coal vacuum delivery system prevents the device that delivery duct stops up, comprise feed arrangement, discharge device, front elasticity short circuit 5, rear elasticity short circuit 13, front pressure sensor 10, rear pressure sensor 14, front vibrating motor 7, after vibration motor 12, and control system 8, signal wire (SW) 9, feed arrangement is connected with front elasticity short circuit 5, dust collector is connected with rear elasticity short circuit 13, front elasticity short circuit 5 is connected by delivery duct 11 with rear elasticity short circuit 13, vibrating motor 7 before being provided with on the close delivery duct 11 of front elasticity short circuit 5, near on the delivery duct 11 of rear elasticity short circuit 13 ends, be provided with after vibration motor 12, pressure sensor 10 before delivery duct 11 middle parts are provided with, rear pressure sensor 14 is arranged on dust collector entrance point, front pressure sensor 10, rear pressure sensor 14, front vibrating motor 7, after vibration motor 12 is connected with control system 8 by signal wire (SW) 9, as shown in Figure 1.
Described front elasticity short circuit (5), rear elasticity short circuit (13) comprise mozzle (20), bellows flange (21), bellows (22), a bellows flange (21) is respectively welded at bellows (22) two ends, mozzle (20) inserts bellows (22), as shown in Figure 2 from left side through bellows flange (21); A side that has mozzle (20) of front elasticity short circuit (5) is connected with feed pipe (4), and opposite side is connected with delivery duct (11); A side that has mozzle (20) of rear elasticity short circuit (13) is connected with delivery duct (11) down.
Feed arrangement comprises coal mill feed bin 1, ventilation inlet 2, conveyor screw 6, inlet point 3, feed pipe 4, and feed pipe 4 one end are provided with ventilation inlet 2, one end is connected with front elasticity short circuit 5, and coal mill feed bin 1 is connected by conveyor screw 6 with feed pipe 4.
Dust collector comprises disconnector 16, blow-off valve 17, air inducing pipeline 15, air outlet 19, induced draft fan 18, disconnector 16 one end are connected with rear elasticity short circuit 13 and air inducing pipeline 15, the other end is provided with blow-off valve 17, and air outlet 19 is connected by induced draft fan 18 with air inducing pipeline 15.
Front elasticity short circuit 5, rear elasticity short circuit 13 comprise mozzle 20, bellows flange 21, bellows 22.As shown in Figure 2.
A kind of pebble coal vacuum delivery system prevents the method that delivery duct stops up, the device that utilizes above-mentioned pebble coal vacuum delivery system to prevent that delivery duct from stopping up is realized, utilize front pressure sensor 10 and rear pressure sensor 14 to detect the variation of delivery duct degree of vacuum, the position that the interior pebble coal of judgement delivery duct 11 gathers, and by control system 8, control start and stop and the vibration intensity of vibrating motor 7 and 12, utilize mechanical vibration that pebble coal accumulation is scattered, pebble coal particle velocity is accelerated in combined action by mechanical vibration and negative-pressure air-flow, avoid further gathering of follow-up pebble coal to cause pipe choking.
In pebble coal course of conveying, if rear pressure sensor 14 detects vacuum up, and front pressure sensor 10 detects degree of vacuum reduction, illustrate that delivery duct starts to gather near dust exhaustor end pebble coal, front pressure sensor 10, rear pressure sensor 14 are transferred to control system 8 by signal wire (SW) 9 by pressure signal, vibrating motor 7 and after vibration motor 12 before control system 8 starts by signal wire (SW) 9, and making after vibration motor oscillating intensity be greater than front vibrating motor, direction of vibration is consistent with pebble coal throughput direction; Current pressure sensor 10 and rear pressure sensor 14 detect degree of vacuum simultaneously and rise, illustrate in delivery duct and start to gather near coal mill end pebble coal, vibrating motor 7 and after vibration motor 12 before control system 8 starts by signal wire (SW) 9, and make the vibration intensity of front vibrating motor 7 be greater than after vibration motor 12.At vibrating motor 7 and vibrating motor 12 run durations, the vibration of delivery duct 11 is decayed by the buffer action of front elasticity short circuit 5 and rear elasticity short circuit 13, avoids causing the vibration of dust collector 16 and conveyor screw 6.
Pebble coal delivery system anti-blocking method of the present invention and device, when pebble coal just starts to gather, by mechanical vibration, pebble coal accumulation scattered and accelerate the kinematic velocity of pebble coal, what can effectively prevent follow-up pebble coal further gathers the obstruction causing, thereby guarantees the normal operation of pebble coal delivery system.
Claims (5)
1. pebble coal vacuum delivery system prevents the device that delivery duct stops up, and comprises feed arrangement, discharge device, front elasticity short circuit (5), rear elasticity short circuit (13), front pressure sensor (10), rear pressure sensor (14), front vibrating motor (7), after vibration motor (12), and control system (8), signal wire (SW) (9), it is characterized in that, feed arrangement is connected with front elasticity short circuit (5), dust collector is connected with rear elasticity short circuit (13), front elasticity short circuit (5) is connected by delivery duct (11) with rear elasticity short circuit (13), near on the delivery duct (11) of front elasticity short circuit (5), be provided with front vibrating motor (7), on the delivery duct (11) near rear elasticity short circuit (13) end, be provided with after vibration motor (12), at delivery duct (11) middle part, be provided with front pressure sensor (10), rear pressure sensor (14) is arranged on dust collector entrance point, front pressure sensor (10), rear pressure sensor (14), front vibrating motor (7), after vibration motor (12) is connected with control system (8) by signal wire (SW) (9).
2. pebble coal vacuum delivery system according to claim 1 prevents the device that delivery duct stops up, it is characterized in that, feed arrangement comprises coal mill feed bin (1), ventilation inlet (2), conveyor screw (6), inlet point (3), feed pipe (4), feed pipe (4) one end is provided with ventilation inlet (2), one end is connected with front elasticity short circuit (5), and coal mill feed bin (1) is connected by conveyor screw (6) with feed pipe (4).
3. pebble coal vacuum delivery system according to claim 1 and 2 prevents the device that delivery duct stops up, it is characterized in that, dust collector comprises disconnector (16), blow-off valve (17), air inducing pipeline (15), air outlet (19), induced draft fan (18), disconnector (16) one end is connected with rear elasticity short circuit (13) and air inducing pipeline (15), the other end is provided with blow-off valve (17), and air outlet (19) is connected by induced draft fan (18) with air inducing pipeline (15).
4. pebble coal vacuum delivery system according to claim 1 and 2 prevents the device that delivery duct stops up, it is characterized in that, front elasticity short circuit (5), rear elasticity short circuit (13) comprise mozzle (20), bellows flange (21), bellows (22), a bellows flange (21) is respectively welded at bellows (22) two ends, and mozzle (20) inserts bellows (22) from left side through bellows flange (21); A side that has mozzle (20) of front elasticity short circuit (5) is connected with feed pipe (4), and opposite side is connected with delivery duct (11); A side that has mozzle (20) of rear elasticity short circuit (13) is connected with delivery duct (11) down.
5. a pebble coal vacuum delivery system prevents the method that delivery duct stops up, it is characterized in that, utilize pebble coal vacuum delivery system described in claim 1 to 4 any one claim to prevent that the device that delivery duct stops up from realizing, utilize front pressure sensor (10) and rear pressure sensor (14) to detect the variation of delivery duct degree of vacuum, the position that the interior pebble coal of judgement delivery duct (11) gathers, and by control system (8), control start and stop and the vibration intensity of vibrating motor (7) and (12), utilize mechanical vibration that pebble coal accumulation is scattered, pebble coal particle velocity is accelerated in combined action by mechanical vibration and negative-pressure air-flow, avoid further gathering of follow-up pebble coal to cause pipe choking.
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Cited By (10)
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| CN104150225A (en) * | 2014-08-28 | 2014-11-19 | 川田机械制造(上海)有限公司 | Pipeline conveying block preventing equipment under pressure feed state and using method thereof |
| CN104310063A (en) * | 2014-08-28 | 2015-01-28 | 川田机械制造(上海)有限公司 | Anti-clogging equipment used in pipe conveying, and using method of equipment |
| CN104747839A (en) * | 2015-02-05 | 2015-07-01 | 江西稀有稀土金属钨业集团有限公司 | Sand pump pulp inlet pipe connecting device and connecting method thereof |
| CN105057078A (en) * | 2015-07-10 | 2015-11-18 | 广东电网有限责任公司电力科学研究院 | Operational method for preventing mill of coal mill from being blocked |
| EP2974805A1 (en) * | 2014-07-18 | 2016-01-20 | Posco | Apparatus for preventing blockages of foreign objects and cleaning robot including the same |
| CN105270882A (en) * | 2015-05-29 | 2016-01-27 | 昆明中铁大型养路机械集团有限公司 | Integrated material storage and pneumatic exhaust method and corresponding device |
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| CN105268704A (en) * | 2014-07-18 | 2016-01-27 | Posco公司 | Apparatus for preventing blockages of foreign objects and cleaning robot including the same |
| CN104150225B (en) * | 2014-08-28 | 2017-02-15 | 川田机械制造(上海)有限公司 | Pipeline conveying block preventing equipment under pressure feed state and using method thereof |
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| CN104310063A (en) * | 2014-08-28 | 2015-01-28 | 川田机械制造(上海)有限公司 | Anti-clogging equipment used in pipe conveying, and using method of equipment |
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| CN104747839A (en) * | 2015-02-05 | 2015-07-01 | 江西稀有稀土金属钨业集团有限公司 | Sand pump pulp inlet pipe connecting device and connecting method thereof |
| CN105270882A (en) * | 2015-05-29 | 2016-01-27 | 昆明中铁大型养路机械集团有限公司 | Integrated material storage and pneumatic exhaust method and corresponding device |
| CN105057078B (en) * | 2015-07-10 | 2017-10-10 | 广东电网有限责任公司电力科学研究院 | The anti-blocking mill operation method of coal pulverizer |
| CN105057078A (en) * | 2015-07-10 | 2015-11-18 | 广东电网有限责任公司电力科学研究院 | Operational method for preventing mill of coal mill from being blocked |
| CN107381059A (en) * | 2017-07-24 | 2017-11-24 | 艾迪机器(杭州)有限公司 | A kind of kitchen garbage lifting induction system of segmented dewatered sludge |
| CN107381059B (en) * | 2017-07-24 | 2022-12-27 | 杭州求是化工机械有限公司 | Kitchen waste lifting and conveying system for sectional dewatered sludge |
| CN107756263A (en) * | 2017-11-24 | 2018-03-06 | 无锡市日升机械厂 | Uniform discharge type sand-blasting machine |
| CN108121080A (en) * | 2018-01-31 | 2018-06-05 | 安徽省东超科技有限公司 | A kind of body three-dimensional display apparatus and its control method based on reciprocating image scanning |
| CN108121080B (en) * | 2018-01-31 | 2024-04-16 | 安徽省东超科技有限公司 | Body three-dimensional display device based on reciprocating image scanning and control method thereof |
| CN109269225A (en) * | 2018-11-30 | 2019-01-25 | 上海天晓环保工程有限公司 | A kind of wet desulphurization gypsum drying process device |
| CN109269225B (en) * | 2018-11-30 | 2023-08-22 | 上海天晓环保工程有限公司 | Wet flue gas desulfurization gypsum drying treatment device |
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Application publication date: 20140409 |