CN103752592A - Efficient recycling device and process for hollow particles in ash residues in ash storing yard and storage yard of power station - Google Patents
Efficient recycling device and process for hollow particles in ash residues in ash storing yard and storage yard of power station Download PDFInfo
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- CN103752592A CN103752592A CN201310748468.4A CN201310748468A CN103752592A CN 103752592 A CN103752592 A CN 103752592A CN 201310748468 A CN201310748468 A CN 201310748468A CN 103752592 A CN103752592 A CN 103752592A
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Abstract
The invention relates to an efficient recycling device and process for hollow particles in ash residues in an ash storing yard and a storage yard of a power station. The device comprises a crusher, a screw feeder, a mortar stirring tank, a water cement ratio monitoring-feedback-control system, a buffering water tank, a circulating water pump and an ash yard water return pipeline, wherein purifying-grading-upgrading devices are connected to a collection tank and a water return tank. The process comprises the following steps: (1) crushing the ash residues in the ash storing yard and the storage yard of the power station, mixing the ash residues with returned water; (2) carrying out concentration stabilization on high-concentration grout; (3) conveying the high-concentration grout to a distribution-collection tank through a slurry pump and a manual regulating valve; (4) enabling overflow water and bled water in a dewatering bin to automatically flow into a concentrator; (5) enabling a mixture of floating bead particles and water in the collection tank to pass through the purifying-grading-upgrading devices; (6) enabling the overflow water in the concentrator to automatically flow into the buffering water tank; (7) enabling high-concentration residue slurry discharged from the bottoms of the concentrator and the buffering water tank to continuously enter the dewatering bin to be recycled. According to the efficient recycling device and process, the comprehensive utilization level of the ash residues in the storage yard is effectively improved.
Description
Technical field
The present invention relates to a kind of hollow-particle high efficiente callback device and recovery process, especially relate to a kind of ash storing field in power station stockyard lime-ash hollow-particle high efficiente callback device and recovery process.
Background technology
Flyash and slag are the byproducts in thermal power plant, the annual flyash enormous amount producing of China, make a low multiple use, a large amount of flyash is deposited in ash, not only taking a large amount of arable lands but also contaminated environment, so realize Ash Utilization comprehensive utilization, become an important techno-economic policy in China's economic construction, is to solve China's power generation environmental pollution, the important means of contradiction between resource shortage is also that current thermal power industry faces one of main task of solution.
Traditional flyash and slag are levigate, and sorting process is produced a secondary commodity flyash mainly for cement and the Concrete Industry of respective regions.But this technique is easily subject to relevant industries relation between supply and demand, the market prices such as cement and transports the impact of the aspects such as radius, and unstable owing to lacking Basic Experiment Study and powdered coal ash products as building material quality, further hindered the utilization of flyash.Because ash disposal area stockyard lime-ash moisture is very high, wherein contain more wear-resisting and cenosphere that intensity is higher, if adopt levigate sorting process, must carry out pre-dried to stockyard lime-ash, cost of disposal increases greatly.
In the lime-ash of stockyard, contain more cenosphere particle, therefore stockyard lime-ash is directly collected after broken stir process, carry out hollow-particle high efficiente callback PROCESS FOR TREATMENT, hollow float bead product proportion that production obtains is little, thermal conductivity factor is little, high temperature resistant, wear-resisting, intensity is high, have higher electric resistivity and resistance heat effect preferably, in chemical industry, machinery, construction material, aerospace industry and deep ocean work, cryogenic engineering, have a wide range of applications, and at home and abroad the market demand is vigorous at present.
In power station, also there is at present the method that reclaims hollow-particle, open day is on 04 03rd, 2013, publication number is in the Chinese patent of CN103008332A, retracting device and the recovery method of a kind of Rear of Utility Boiler heating surface flyash and bottom slag hollow-particle are disclosed, the method recovery for Rear of Utility Boiler heating surface flyash and bottom slag hollow-particle.Because fly ash in electric power plant stirs and rolls processing through humidification in the process of stockyard, and long-term stacking can cause the problems such as lime-ash seriously hardens, and is difficult to realize on the spot stockyard lime-ash hollow-particle continuous high-efficient and reclaims.
In sum, also do not have now one can effectively improve stockyard ash comprehensive utilization level, added value of product is high, remarkable in economical benefits, be not subject to the ash storing field in power station stockyard lime-ash hollow-particle high efficiente callback technique of regional markets supply-demand relationship and Product transport radius limit.
Summary of the invention
The object of the invention is to overcome above shortcomings in prior art, and providing one can effectively improve stockyard ash comprehensive utilization level, added value of product is high, remarkable in economical benefits, be not subject to ash storing field in power station stockyard lime-ash hollow-particle high efficiente callback device and the technique of regional markets supply-demand relationship and Product transport radius limit.
The present invention addresses the above problem adopted technical scheme: the design feature of this ash storing field in power station stockyard lime-ash hollow-particle high efficiente callback device is: comprise disintegrating machine, screw(-type) feeder, ribbon conveyer, electric blender, mortar stirring pool, ratio of mud monitoring feedback control system, electric control valve, slag stock pump, manual modulation valve, drainage bin, thickener, buffering pond, Pneumatic gate valve, distribute header, collecting pit, purify classification device for improving quality, back pool, a slush pump, No. two slush pumps, water circulating pump and an ash water return pipeline, described screw(-type) feeder is connected to the bottom of disintegrating machine, described ribbon conveyer is connected with screw(-type) feeder, this ribbon conveyer coordinates with mortar stirring pool, described electric blender is arranged in mortar stirring pool, described distribution header is connected on mortar stirring pool by slag stock pump and manual modulation valve, described drainage bin is connected to and is distributed in header by Pneumatic gate valve, overflowing water port in described drainage bin and bleed mouth are all connected on thickener, in described thickener float pearl collect mouthful and overfall be connected on collecting pit and buffered water pond, the bottom of this thickener is connected to and is distributed in header by a slush pump, overfall in described buffering pond is connected on back pool, the bottom in this buffering pond is connected to and is distributed in header by No. two slush pumps, described purification classification device for improving quality is connected on collecting pit and back pool, described back pool is connected to the counter-flushing pipeline of drainage bin by water circulating pump, the counter-flushing pipeline in buffering pond, on the supply line of mortar stirring pool and an ash water return pipeline, described electric control valve is arranged on the supply line of mortar stirring pool, and described ratio of mud monitoring feedback control system is connected to screw(-type) feeder, on mortar stirring pool and electric control valve.Make thus the retracting device in the present invention can effectively improve stockyard ash comprehensive utilization level, have that added value of product is high, remarkable in economical benefits, be not subject to the advantages such as regional markets supply-demand relationship and Product transport radius limit, economy and the social benefit of resources effective utilization have been given full play to, stockyard lime-ash is made the best use of everything, have a wide range of applications and promotional value.
As preferably, the quantity of drainage bin of the present invention is two.
The present invention uses the feature of the recovery process of ash storing field in power station stockyard lime-ash hollow-particle high efficiente callback device to be: described recovery process is as follows:
(1) ash storing field in power station stockyard lime-ash is after disintegrating machine carries out fragmentation, then is delivered in mortar stirring pool through screw(-type) feeder and ribbon conveyer, under the effect of electric blender, with backwater mixing and stirring, obtains high concentration slurries;
(2) by the ratio of mud, monitor feedback control system and can guarantee that the concentration of mortar stirring pool middle and high concentration slurries keeps maintenance level, ratio of mud monitoring feedback control system can, according to the procedure judges of setting, be carried out the aperture of rotating speed and the electric control valve of adjustable screw batcher by feedback command;
(3) high concentration slurries are delivered to distribution header through slag stock pump and manual modulation valve, by Pneumatic gate valve, switch to drainage bin, and the mixture of lime-ash and water, after precipitation dehydration, is transported to user or an ash storage by the bottom ashe of drainage bin with dump truck;
(4) overflow water in drainage bin and bleed flow automatically in thickener, under churned mechanically effect, float pearl particle and finally enter collecting pit;
(5) mixture that floats pearl particle and water in collecting pit is through purifying classification device for improving quality, can continuously produce added value higher float pearl product, this floats pearl product and is the final products that will reclaim, the water of separating is delivered to back pool;
(6) overflow water in thickener is from flowing in buffered water pond, after further clarification is cooling, again from flowing in back pool, water in back pool is divided into two-way after water circulating pump boosts, one road is connected to counter-flushing pipeline, the buffering counter-flushing pipeline in pond and the supply line of mortar stirring pool of drainage bin, and the ash water return pipeline of separately leading up to is transported to power station and recycles;
(7) the high concentration slag slurry that discharge the bottom in the bottom of thickener and buffered water pond, and, overflow water under the flushing cinder sewage that collect on ground, a small amount of drainage bin bleed and buffered water pond accident condition is delivered to distribution header by a slush pump and No. two slush pumps, continues to enter drainage bin and recycles.
Make thus the recovery process tool in the present invention have the following advantages: (1) technological operation is easy; (2) operating cost is lower; (3) float the continuous production capacity of pearl strong; (4) added value of product is high, remarkable in economical benefits; (5) investment recovery time is short; (6) technology promotion prospect is good.
The present invention compared with prior art, have the following advantages and effect: the discharge of Hui Changshi coal-fired station powdered coal cinder and storage place, a large amount of powdered coal cinders are stacked not only land occupation resource, surrounding enviroment are caused to severe contamination, and seriously limited stockyard ash comprehensive utilization.Ash storing field in power station stockyard lime-ash particle diameter is distributed more widely, hollow float bead content is generally 0.5wt% ~ 3wt%, the present invention can extract the cenosphere that proportion is less from the lime-ash of stockyard, the characteristic such as this cenosphere has that intensity is high, thermal insulation good, high temperature resistant, wear-resisting and electrical insulating property is good has purposes widely in chemical industry, metallurgy, machinery, construction material, aerospace industry and deep ocean work, cryogenic engineering.The present invention can improve stockyard ash comprehensive utilization level effectively, have that added value of product is high, remarkable in economical benefits, be not subject to the advantages such as regional markets supply-demand relationship and Product transport radius limit, economy and the social benefit of resources effective utilization have been given full play to, stockyard lime-ash is made the best use of everything, have a wide range of applications and promotional value.
Because fly ash in electric power plant stirs and rolls processing through humidification in the process of stockyard, and long-term stacking can cause the problems such as lime-ash seriously hardens, and introduced stockyard lime-ash pretreatment unit in the present invention, can realize on the spot stockyard lime-ash hollow-particle continuous high-efficient and reclaim.
Accompanying drawing explanation
Fig. 1 is the structural representation of ash storing field in power station stockyard lime-ash hollow-particle high efficiente callback device in the embodiment of the present invention.
Fig. 2 is the schematic flow sheet of ash storing field in power station stockyard lime-ash hollow-particle high efficiente callback technique in the embodiment of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing and by embodiment, the present invention is described in further detail, and following examples are explanation of the invention and the present invention is not limited to following examples.
Embodiment.
Referring to Fig. 1 to Fig. 2, ash storing field in power station stockyard lime-ash hollow-particle high efficiente callback device in the present embodiment comprises disintegrating machine 1, screw(-type) feeder 2, ribbon conveyer 3, electric blender 4, mortar stirring pool 5, ratio of mud monitoring feedback control system 6, electric control valve 7, slag stock pump 8, manual modulation valve 9, drainage bin 10, drainage bin 11, thickener 12, buffering pond 13, Pneumatic gate valve 14, distribute header 15, collecting pit 16, purify classification device for improving quality 17, back pool 18, a slush pump 19, No. two slush pumps 20, water circulating pump 21 and an ash water return pipeline 22.
Screw(-type) feeder 2 in the present embodiment is connected to the bottom of disintegrating machine 1, and ribbon conveyer 3 is connected with screw(-type) feeder 2, and this ribbon conveyer 3 coordinates with mortar stirring pool 5, and electric blender 4 is arranged in mortar stirring pool 5.
In thickener 12 in the present embodiment float pearl collect mouthful and overfall be connected on collecting pit 16 and buffered water pond 13, the bottom of this thickener 12 is connected to and is distributed in header 15 by a slush pump 19, overfall in buffering pond 13 is connected on back pool 18, the bottom in this buffering pond 13 is connected to and is distributed in header 15 by No. two slush pumps 20, purifies classification device for improving quality 17 and is connected on collecting pit 16 and back pool 18.
Ash storing field in power station stockyard lime-ash hollow-particle high efficiente callback technique in the present embodiment is as follows.
(1) ash storing field in power station stockyard lime-ash carries out after fragmentation through disintegrating machine 1, then is delivered in mortar stirring pool 5 through screw(-type) feeder 2 and ribbon conveyer 3, under the effect of electric blender 4, with backwater mixing and stirring, obtains high concentration slurries.
(2) by the ratio of mud, monitor feedback control system 6 and can guarantee that the concentration of mortar stirring pool 5 middle and high concentration slurries keeps maintenance level, ratio of mud monitoring feedback control system 6 can, according to the procedure judges of setting, be carried out the aperture of rotating speed and the electric control valve 7 of adjustable screw batcher 2 by feedback command.
(3) high concentration slurries are delivered to distribution header 15 through slag stock pump 8 and manual modulation valve 9, by Pneumatic gate valve 14, switch to drainage bin 10 and drainage bin 11, the mixture of lime-ash and water, after precipitation dehydration, is regularly transported to user or an ash storage with dump truck according to sediment level-sensing device designation data by the bottom ashe 23 of drainage bin 10 and drainage bin 11.
(4) overflow water in drainage bin 10 and drainage bin 11 and bleed flow automatically in thickener 12, under churned mechanically effect, float pearl particle and finally enter collecting pit 16.
(5) mixture that floats pearl particle and water in collecting pit 16 is through purifying classification device for improving quality 17, can continuously produce added value higher float pearl product, this floats pearl product and is the final products that will reclaim, the water of separating is delivered to back pool 18.
(6) overflow water in thickener 12 is from flowing in buffered water pond 13, after further clarification is cooling, again from flowing in back pool 18, water in back pool 18 is divided into two-way after water circulating pump 21 boosts, one road is connected to counter-flushing pipeline, the buffering counter-flushing pipeline in pond 13 and the supply line of mortar stirring pool 5 of drainage bin 10 and drainage bin 11, and the ash water return pipeline 22 of separately leading up to is transported to power station and recycles.
(7) overflow water under a small amount of bleed and buffering pond 13 accident conditions of the high concentration slag slurry that discharge the bottom of thickener 12, the high concentration slag slurry that discharges the bottom in buffering pond 13, flushing cinder sewage, drainage bin 10 and the drainage bin 11 that collect on ground is delivered to and is distributed header 15 by a slush pump 19 and No. two slush pumps 20, continues to enter drainage bin 10 and drainage bin 11 recycles.
In addition, it should be noted that, the specific embodiment described in this description, the shape of its parts and components, institute's title of being named etc. can be different, and the above content described in this description is only to structure example of the present invention explanation.All equivalence variation or simple change of doing according to described structure, feature and the principle of patent design of the present invention, are included in the protection domain of patent of the present invention.Those skilled in the art can make various modifications or supplement or adopt similar mode to substitute described specific embodiment; only otherwise depart from structure of the present invention or surmount this scope as defined in the claims, all should belong to protection scope of the present invention.
Claims (3)
1. an ash storing field in power station stockyard lime-ash hollow-particle high efficiente callback device, is characterized in that: comprise disintegrating machine, screw(-type) feeder, ribbon conveyer, electric blender, mortar stirring pool, ratio of mud monitoring feedback control system, electric control valve, slag stock pump, manual modulation valve, drainage bin, thickener, buffering pond, Pneumatic gate valve, distribute header, collecting pit, purify classification device for improving quality, back pool, a slush pump, No. two slush pumps, water circulating pump and an ash water return pipeline, described screw(-type) feeder is connected to the bottom of disintegrating machine, described ribbon conveyer is connected with screw(-type) feeder, this ribbon conveyer coordinates with mortar stirring pool, described electric blender is arranged in mortar stirring pool, described distribution header is connected on mortar stirring pool by slag stock pump and manual modulation valve, described drainage bin is connected to and is distributed in header by Pneumatic gate valve, overflowing water port in described drainage bin and bleed mouth are all connected on thickener, in described thickener float pearl collect mouthful and overfall be connected on collecting pit and buffered water pond, the bottom of this thickener is connected to and is distributed in header by a slush pump, overfall in described buffering pond is connected on back pool, the bottom in this buffering pond is connected to and is distributed in header by No. two slush pumps, described purification classification device for improving quality is connected on collecting pit and back pool, described back pool is connected to the counter-flushing pipeline of drainage bin by water circulating pump, the counter-flushing pipeline in buffering pond, on the supply line of mortar stirring pool and an ash water return pipeline, described electric control valve is arranged on the supply line of mortar stirring pool, and described ratio of mud monitoring feedback control system is connected to screw(-type) feeder, on mortar stirring pool and electric control valve.
2. ash storing field in power station according to claim 1 stockyard lime-ash hollow-particle high efficiente callback device, is characterized in that: the quantity of described drainage bin is two.
3. use, as a recovery process for the ash storing field in power station stockyard lime-ash hollow-particle high efficiente callback device in claim 1 or 2, is characterized in that: described recovery process is as follows:
(1) ash storing field in power station stockyard lime-ash is after disintegrating machine carries out fragmentation, then is delivered in mortar stirring pool through screw(-type) feeder and ribbon conveyer, under the effect of electric blender, with backwater mixing and stirring, obtains high concentration slurries;
(2) by the ratio of mud, monitor feedback control system and can guarantee that the concentration of mortar stirring pool middle and high concentration slurries keeps maintenance level, ratio of mud monitoring feedback control system can, according to the procedure judges of setting, be carried out the aperture of rotating speed and the electric control valve of adjustable screw batcher by feedback command;
(3) high concentration slurries are delivered to distribution header through slag stock pump and manual modulation valve, by Pneumatic gate valve, switch to drainage bin, and the mixture of lime-ash and water, after precipitation dehydration, is transported to user or an ash storage by the bottom ashe of drainage bin with dump truck;
(4) overflow water in drainage bin and bleed flow automatically in thickener, under churned mechanically effect, float pearl particle and finally enter collecting pit;
(5) mixture that floats pearl particle and water in collecting pit is through purifying classification device for improving quality, can continuously produce added value higher float pearl product, this floats pearl product and is the final products that will reclaim, the water of separating is delivered to back pool;
(6) overflow water in thickener is from flowing in buffered water pond, after further clarification is cooling, again from flowing in back pool, water in back pool is divided into two-way after water circulating pump boosts, one road is connected to counter-flushing pipeline, the buffering counter-flushing pipeline in pond and the supply line of mortar stirring pool of drainage bin, and the ash water return pipeline of separately leading up to is transported to power station and recycles;
(7) the high concentration slag slurry that discharge the bottom in the bottom of thickener and buffered water pond, and, overflow water under the flushing cinder sewage that collect on ground, a small amount of drainage bin bleed and buffered water pond accident condition is delivered to distribution header by a slush pump and No. two slush pumps, continues to enter drainage bin and recycles.
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Cited By (3)
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| CN110510413A (en) * | 2019-09-20 | 2019-11-29 | 中煤科工集团武汉设计研究院有限公司 | A kind of pipeline coarse granule coal slurry device and its delivery method |
| CN111468510A (en) * | 2020-04-20 | 2020-07-31 | 华电电力科学研究院有限公司 | Device and method for treating alkaline hazardous waste by using clean flue gas of coal-fired power plant |
| CN111892969A (en) * | 2020-08-18 | 2020-11-06 | 李立峰 | Process for extracting refined carbon powder from slag |
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