CN1923643A - Method of alternately operating long-distance dredging and transportation for concentrated phase powdery material - Google Patents
Method of alternately operating long-distance dredging and transportation for concentrated phase powdery material Download PDFInfo
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- CN1923643A CN1923643A CN 200610048240 CN200610048240A CN1923643A CN 1923643 A CN1923643 A CN 1923643A CN 200610048240 CN200610048240 CN 200610048240 CN 200610048240 A CN200610048240 A CN 200610048240A CN 1923643 A CN1923643 A CN 1923643A
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Abstract
This is an alternating operation method for the long distance deoppilant and transportation of dense phase materials. It is realized by referring to a system formed by an ash bucket, ash storage pump, ash transporting pipe, and the air make-up pipe for compressed air. It uses the following way to complete the alternating operation: 1) between the ash storage pump and the ash warehouse, air make-up branch lines of the electromagnetic control valve are evenly connected in series. 2) Inside each of the ash transportation pipe or at each air make-up opening correspondent to each air make-up branch lines, a pressure sensor is equipped. 3) Based on the material feature, pressure of the air compressor and the displacement to determine the normal transportation pressure Y1 and blocking pressure Y2. 4) Filling air to the ash storage pump after full stuffing of materials, pressurize the ash storage pump till the blocking pressure reaches Y2 to start the air make-up status of the air make-up branch line at the opening of the ash transportation pipe to guide the transportation, and wait until the signal for pressure collected by the pressure sensor inside the ash storage pump drops to the normal transportation pressure Y1. 5) When the blocking pressure reaches Y2, open the previous air make-up branch line, refresh air, clean and deoppilate unitl the pressure of the latter air make-up opening drops to normal transportation pressure Y1.
Description
Technical field
The invention belongs to the improvement of the system and the operational method of air dust transporting.A kind of specifically concentrated phase powdery material long-distance dredging and the method for carrying alternately operating.
Background technology
The a large amount of powdery dusts that produce during thermoelectric power station, steel plant produce are collected the storage ash bucket through dust exhaustor, are delivered to the grey storehouse of storage through grey storehouse pumping system strength again.Existing grey storehouse pumping system adopts upstriker ash storehouse pump mostly, comprise the cone pump that is communicated with ash bucket by the blanking valve in the system architecture, fluidized bed plant at the bottom of the storehouse is connected with the compressed gas house steward by air inlet valve, and Cang Ding is provided with the pressurization inflation inlet and is connected with compressed gas house steward gas by pressurizing valve.In the upstriker ash pipeline from the top straight cutting of storehouse pump to the storehouse at the bottom of, the top of fluidisation bed surface.Pump interior ash pipeline in upstriker ash storehouse changes by a bleeder valve and is communicated with main ash pipeline in the existing technology.Total system is set in out the below of ash bucket by a blanking valve and flapper.Present structure inevitably can cause fly ash to produce obstruction in the process of transmission.Thereby cause the interruption of total system operation, need manpower to remove to dredge pipeline, inefficiency and work heavy, the serious imitative normal order of work that hindered.The conventional design length of present Pneumatic ash conveying pipeline is no more than 1500m basically, to guarantee basic normal transmission and both economical consumption gas gray scale.Only comprise the efficient and the power that improve fluid bed in the improved design of institute at present, be provided with and blow technical measures such as stifled along ash pipeline distribution blowdown pipe and all cause comprehensive air consumption excessive, improved operation cost widely in the guaranteed while of continuity of production because lacking the actv. regulate and control method.So do not have significant effect, more out of the question realize surpassing the length of 1500m apart from carrying concentrated phase powdery material.
Summary of the invention
The objective of the invention is to design a kind of concentrated phase powdery material long-distance dredging and the method for carrying alternately operating, make and on system is provided with after the improvement, realize mediation and carry the continuous working that hockets, and keep the gas ash consumption rate of an economy.
Crucial design of the present invention is in the process of carrying the obstruction of instant appearance to be carried out in time and the actv. mediation.According to the process that generation is stopped up and the research of blocked state, the reason of stopping up fluidizing gas often carries the forward to reach the deficiency that aerodynamic force behind the certain distance weakens with tolerance to cause the settling amount of dust to strengthen, path narrows down gradually, vapour lock strengthens gradually, can form decay crest shape rapidly and stop up point when reaching a certain critical value.If in time open the gulp valve that stops up forward and backward of some when stopping up rapid rising of air pressure behind the some this moment, dredge drag reduction, pressure and tolerance obtain then just can dredging rapidly when in time replenishing the obstruction point and realize being converted to the conveying operation once more from the mediation operation.Each gulp valve of opening did not turn-off immediately and continued tonifying Qi this moment, realized that normal the conveying press the back to close blowdown pipes at different levels simultaneously immediately, until the beginning of dredging operation next time.
Designed method of the present invention by means of ash bucket, by blanking valve and ash tube and ash bucket bonded assembly ash storehouse pump, from the pump of grey storehouse, lead to ash pipeline between the ash-storing bin, lead to the compressed gas house steward of grey storehouse pump and be connected the system that the compressed gas arm of each tonifying Qi inlet on the ash pipeline forms and realize that key is to adopt the transformation of following step and operation to finish mediation and the alternately operating of carrying:
1. at grey storehouse pump between the ash-storing bin, on the ash pipeline of institute's parallel laid and the compression blowdown pipe correspondence position, the tonifying Qi branch road of the uniform solenoid regulated valve of connecting,
2. with the cooresponding ash pipeline of each tonifying Qi branch road in, the gas supplementing opening place is provided with pressure sensor,
3. determine normal conveying according to the pressure of the granularity of material and proportion, Air compressor and free air capacity and press Y1 and stop up and press Y2,
4. by the compressed gas house steward the grey storehouse pump of filling it up with behind the granular material is continued the inflation pressurization, when No. zero sensor acquisition in the pump of grey storehouse when stopping up pressure Y2, sending actuation signal makes the blowdown pipe that is positioned at grey storehouse pump, ash pipeline mouth place enter the tonifying Qi state, the guiding material begins transmission along ash pipeline, No. zero sensor acquisition in the pump of grey storehouse drops to normal conveying to pressure signal and presses Y1, close gulp valve
5. all pressure sensors that is located at some gas supplementing openings place collect when stop up pressing Y2 the electromagnetic valve of the command signal of Open valve being delivered in the previous stage tonifying Qi branch road, open prime tonifying Qi branch road cleaning mediation obstacle, the pressure signal that collects until the pressure sensor at back one-level tonifying Qi arm gas supplementing opening place drops to normal conveying and presses Y1.
Fairly obvious, key of the present invention is that system hardware has been made significant improvement.The air intake place that is distributed on each the tonifying Qi branch road on the ash pipeline is provided with pressure sensor, and has taked to be controlled by rearmounted pressure sensor the control step of the electromagnetic valve open and close in the preposition tonifying Qi branch road.Like this, can in time find the generation of obstruction after starting transmission, when realizing block clearing, this moment, rearmounted tonifying Qi branch road was opened, and tolerance has also obtained actv. and replenished.May occur stopping up again after recover carrying, then block clearing again, tonifying Qi again, recover again, finish in the short time all or near the utmost point after all opening until the tonifying Qi branch road and all deposit ash in the pump of grey storehouse and carry and finish.
Good effect of the present invention is can realize the concentrated phase powdery material long-distance dredging and carry alternately operating, can disposablely finish the transmission of material in the pump of whole storehouse continuously.Because having stipulated the shutoff of normal conveying presses, having guaranteed does not have emptying in the total system, kept reasonable fluidised form from start to finish,, compared with identical air compressor system and can improve transmission distance 100% so the gas gray scale of its consumption is compared obvious reduction with same distance.
Further specify below in conjunction with accompanying drawing and the objective of the invention is how to realize.
Description of drawings
Fig. 1 is the structural representation of system of the present invention.
Fig. 2 is the structural representation of tonifying Qi branch road.
Fig. 3 is the control circuit figure when adopting the mechanical compression sensor
Fig. 4 is the control circuit figure when adopting piezoelectric pressure indicator
1 is ash bucket among the figure, the 2nd, cone pump, the 3rd, the compressed gas house steward, the 4th, ash pipeline, the 5th, blowdown pipe, the 6th, add air pipe, No. zero pressure sensor the 7th,, 8,9, the 10th, flow control valve, the 11st, be positioned at the blowdown pipe branch road of ash pipeline port, 12-14 is the blowdown pipe branch road that is positioned on the outer ash pipeline of cone pump, the 15th, electromagnetic valve, the 16th, pressure sensor, logical relation between dotted line representative pressure sensor among Fig. 1 and the controlled electromagnetic valve, the 17th, blanking valve, the 18th, fluid bed, the drive coil of the electromagnetic valve that the L representative is controlled, K1 represents sealing, normal open switch in the mechanical type dibit double-throw switch under air pressure drives, K2 represents sealing, normally closed switch in the mechanical type dibit double-throw switch under air pressure drives, J representative and the synchronous relay normally open contact that starts of coil electromagnetic valve that L is controlled, CPU represents the central process unit of supporting computer, EEPROM is the scratch pad memory that has management software and gross data, and 74LS represents intermediate memory, B1, B2 represents decoder, 16A is and the digital switch circuit of pressure sensor 16 applied in any combination that 15A provides starting current and the digital switch circuit of applied in any combination to electromagnetic valve 15.
The specific embodiment
The system structure design that provides in conjunction with the accompanying drawings can be clearly seen that, this method by means of ash bucket 1, by blanking valve 17 and ash tube and ash bucket 1 bonded assembly ash storehouse pump 2, from grey storehouse pump 2, lead to ash pipeline 4 between the ash-storing bin, lead to the compressed gas house steward 3 of grey storehouse pump 2 and be connected the basic system structure that the blowdown pipe 5 of each tonifying Qi inlet on the ash pipeline 4 forms and realize that key is to adopt following step to finish mediation and the alternately operating of carrying:
1. at grey storehouse pump 2 between the ash-storing bin, on the ash pipeline 4 and blowdown pipe 5 correspondence positions of institute's parallel laid, the tonifying Qi branch road of the uniform solenoid regulated valve 15 of connecting,
2. with the cooresponding ash pipeline of each tonifying Qi branch road in, the gas supplementing opening place is provided with pressure sensor 16,
3. determine normal conveying according to the pressure of the granularity of material and proportion, Air compressor and free air capacity and press Y1 and stop up and press Y2,
4. by adding the grey storehouse pump 2 lasting inflation pressurizations after 6 pairs of air pipes are filled it up with granular material, when No. zero sensor 7 in the grey storehouse pump 2 collects obstruction pressure Y2, sending actuation signal makes the tonifying Qi arm 11 that is positioned at grey storehouse pump, ash pipeline mouth place enter the tonifying Qi state, the guiding material begins transmission along ash pipeline, No. zero sensor acquisition in the pump of grey storehouse drops to normal conveying to pressure signal and presses Y1, close the electromagnetic valve in the tonifying Qi branch road 11
5. the pressure sensor that is located at some gas supplementing openings place collects and stops up when pressing Y2 the electromagnetic valve the command signal of Open valve delivered in the previous stage tonifying Qi branch road, opens prime tonifying Qi branch road cleaning mediation obstacle and coordinates the prime mediation and block, and the pressure signal that collects until the pressure sensor at back one-level tonifying Qi arm gas supplementing opening place drops to normal conveying and presses Y1.
After above basic improvement design is made by system, after filling it up with powder at every turn and reaching actuating pressure, the tonifying Qi arm 11 that is located at cone pump 2 bottoms, ash pipeline 4 ash charge ports will at first be opened tonifying Qi, and fluidised material advances to the forward position ash pipeline simultaneously.Continue at the storehouse pump under the support of tonifying Qi pressurization,, carry propelling also can reach certain distance and just stop up then even without the condition of fluid bed.Pressure increasing rapidly in the pipeline before the obstruction point, promote to stop up the bottleneck area before point moves formation plug point, when pressure reaches the obstruction pressure Y2 of setting in the pipeline before stopping up point, electromagnetic valve in the tonifying Qi branch road of obstruction point previous stage is opened immediately, the powder of a cleaning plug preceding deposition descends the preceding vapour lock of plug point rapidly.At this moment, electromagnetic valve clothing in the tonifying Qi branch road before the plug point is all opened, pressure and tolerance abundance, can instantaneously wash the plug point open and reenter feed status, comprise near the electromagnetic valve in the previous tonifying Qi branch road of plug point behind at this moment all plug points and not closing, to keep pressure and additional tolerance, until along with the adding barometric pressure condition drop to the normal conveying that designs and presses Y1 when in sight of fed distance the time, electromagnetic valve in the tonifying Qi branch road of being opened is closed successively, when next one plug point occurring, and the above process of repetition, be converted to feed status once more from stopping up, empty until whole powders, the closeall gulp valve of pressure sensor, whole conveying operation is finished.
One of key of the present invention also is to design the distribution distance of arranging in the tonifying Qi branch road, dredges tonifying Qi and back before when calculating preposition plug point and forming and stops up and press the minor increment that promotes permission.Be not more than 10m and be provided with one by the experimental calculation of existing fly ash in electric power plant and 1500m Pneumatic ash conveying equipment is begun every interval at the ash inlet of tonifying Qi branch road uniform, that connecting solenoid regulated valve between ash pipeline 4 and compression blowdown pipe 5 correspondence positions from ash pipeline 4 ash charge mouths, till distance ash pipeline 4 ash holes are less than the 8m place.
Below given be to realize mediation and carry the concrete measure that hockets.
Embodiment 2 be provided in a side of that tonifying Qi branch road inlet place adopts pressure sensor be piezoelectric pressure indicator, by sensor acquisition to analog signal through analogue to digital conversion after digital switch circuit 16A directly reads in the CPU of supporting controlling computer, and press data Y 1 with the normal conveying that deposits EEPROM in and stop up and press data Y 2 to compare, to assigning open command, assign the instruction of this electromagnetic valve coil being kept failure of current by digital switch circuit 15A when being less than or equal to Y1 during more than or equal to Y2 by the electromagnetic valve of digital switch circuit 15A in previous stage tonifying Qi branch road.Fig. 4 is given is the circuit diagram of the supporting computer relevant with present embodiment.Supporting computer expert crosses the pressure signal of digital switch circuit 16A scanning collection piezoelectric pressure indicator, and electromagnetic valve is opened and closed signal passes to electromagnetic valve relevant in the tonifying Qi branch road by crossing digital switch circuit 15A, thereby finishes task of the present invention.
For efficient and the speed that improves conveying, below the ash charge mouth of the bottom of grey storehouse pump 2, ash pipeline 4, be provided with fluidized bed plant 18, the unlatching of the aerating control electromagnetic valve 10 in this device or turn-off and be controlled by No. zero sensor 7 in the grey storehouse pump 2 synchronously or be controlled by manual switch.Increasing fluidized bed plant is in order to improve starting state, improve the efficient and the speed of carrying, but air consumption can to strengthen.
Electromagnetic valve (15) in each tonifying Qi branch road is provided with the indicator lamp of representing its unlatching or closed condition, is beneficial to monitoring state and repair apparatus.
Claims (6)
1, a kind of concentrated phase powdery material long-distance dredging and the method for carrying alternately operating, this method by means of ash bucket (1), by blanking valve (17) and ash tube and ash bucket (1) bonded assembly ash storehouse pump (2), from grey storehouse pump (2), lead to ash pipeline (4) between the ash-storing bin, lead to the compressed gas house steward (3) of grey storehouse pump (2) and be connected ash pipeline (4) and go up the system that the blowdown pipe (5) of each tonifying Qi inlet forms and realize, it is characterized in that adopting following step to finish the alternately operating of mediation and conveying:
1. at grey storehouse pump (2) between the ash-storing bin, on the ash pipeline (4) and blowdown pipe (5) correspondence position of institute's parallel laid, the tonifying Qi branch road of the uniform electromagnetic valve of connecting (15),
2. interior with the cooresponding ash pipeline of each tonifying Qi branch road (4), gas supplementing opening place is provided with pressure sensor (16),
3. determine normal conveying according to the pressure of the granularity of material and proportion, Air compressor and free air capacity and press Y1 and stop up and press Y2,
4. by adding air pipe (6) the grey storehouse pump of filling it up with behind the granular material (2) is continued the inflation pressurization, when No. zero sensor (7) in the grey storehouse pump (2) collects obstruction pressure Y2, sending actuation signal makes the tonifying Qi arm (11) that is positioned at grey storehouse pump, ash pipeline (4) port enter the tonifying Qi state, the guiding material begins transmission along ash pipeline (4), No. zero sensor acquisition in grey storehouse pump (2) drops to normal conveying to pressure signal and presses Y1, close the electromagnetic valve of tonifying Qi branch road (11)
5. the pressure sensor that is located at some gas supplementing openings place collects and stops up when pressing Y2 the electromagnetic valve the command signal of Open valve delivered in the previous stage tonifying Qi branch road, opens prime tonifying Qi branch road cleaning mediation obstacle and coordinates back level mediation and block, and the pressure signal that collects until the pressure sensor at back one-level tonifying Qi arm gas supplementing opening place drops to normal conveying and presses Y1.
2, according to said concentrated phase powdery material long-distance dredging of claim 1 and the method for carrying alternately operating, the ash inlet that it is characterized in that being arranged on tonifying Qi branch road uniform, that connecting solenoid regulated valve between ash pipeline (4) and compression blowdown pipe (5) correspondence position begins every interval from ash pipeline (4) ash charge port and is not more than 10m and is provided with one, till distance ash pipeline (4) ash hole is less than 6m.
3, according to said concentrated phase powdery material long-distance dredging of claim 1 and the method for carrying alternately operating, it is characterized in that at the pressure sensor that is located at tonifying Qi branch road entrance (16) be a sealing, mechanical type dibit double-throw switch under air pressure drives, reach the drive coil (L) that props up way solenoid valve (15) by normal open switch set in the pressure sensor (K1) to the tonifying Qi of next stage when stop up pressing Y2 and send actuation signal, when reaching normal conveying and pressing Y1 by normally closed switch set in the pressure sensor (K2) cut off next stage tonifying Qi branch road solenoid-driven coil (L) keep electric current.
4, according to said concentrated phase powdery material long-distance dredging of claim 1 and the method for carrying alternately operating, the pressure sensor (16) that it is characterized in that being located at tonifying Qi branch road entrance is a piezoelectric pressure indicator, by sensor adopt analog signal that (16) collect through analogue to digital conversion after digital switch circuit (16A) directly reads in the CPU of supporting controlling computer, and press data Y 1 with the normal conveying that deposits EEPROM in and stop up and press data Y 2 to compare, to assigning open command, assign the instruction of this electromagnetic valve coil being kept failure of current by digital switch circuit (15A) when being less than or equal to Y1 during more than or equal to Y2 by the electromagnetic valve of digital switch circuit (15A) in previous stage tonifying Qi branch road.
5, according to said concentrated phase powdery material long-distance dredging of claim 1 and the method for carrying alternately operating, it is characterized in that being provided with fluidized bed plant (18) below the ash charge mouth of bottom, ash pipeline (4) unlatching of the aerating control electromagnetic valve (10) in this device or turn-off and be controlled by No. zero sensor (7) in the grey storehouse pump (2) synchronously or be controlled by manual switch at grey storehouse pump (2).
6, according to said concentrated phase powdery material long-distance dredging of claim 1 and the method for carrying alternately operating, it is characterized in that the electromagnetic valve (15) in each tonifying Qi branch road is provided with the indicator lamp of representing its unlatching or closed condition.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2006100482404A CN1923643B (en) | 2006-09-04 | 2006-09-04 | Method of alternately operating long-distance dredging and transportation for concentrated phase powdery material |
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| CN2006100482404A CN1923643B (en) | 2006-09-04 | 2006-09-04 | Method of alternately operating long-distance dredging and transportation for concentrated phase powdery material |
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| CN1923643A true CN1923643A (en) | 2007-03-07 |
| CN1923643B CN1923643B (en) | 2010-06-23 |
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| CN107226353A (en) * | 2016-03-25 | 2017-10-03 | 宝山钢铁股份有限公司 | It is a kind of from dredging material-transporting system and its from dredging method |
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