CN103723519A - Coal ash collecting and delivery method - Google Patents

Abstract

The invention discloses a coal ash collecting and delivery method. Smoke is collected through an ash separator and enters an ash hopper, coal ash enters a sender, a feeding dome valve at an inlet of the sender is closed, the sender is airtight, compressed air is led into the sender, a discharging valve at an outlet of the sender is opened, the coal ash and the compressed air are together discharged from the outlet of the sender, the compressed air is led into a delivery pipe to serve as delivery air, air supplying is carried out on the gasified coal ash through an air supplying device at an outlet of the discharging valve, a bypass pipe is arranged on the delivery pipe, when the pipe is blocked, blocking blowing is carried out through the compressed air, when the delivery pressure is gradually reduced to a set value, delivery air, supplied air and blocking blowing air to the pipe are closed, the discharging valve is closed, the feeding doom valve at the inlet of the sender is opened to carry out discharging, and next circulation begins. According to the coal ash collecting and deliver method, the coal ash generated by burning of a boiler is sufficiently and efficiently used and delivered into a raw material bin through the pipe, intermediate links are omitted, and pollution to the environment is reduced.

Description

A kind of fly ash is collected and carrying method

Technical field

The present invention relates to field of Environment Protection, relate in particular to a kind of fly ash and collect and carrying method.

Background technology

Along with industrial expansion, demand to electric power increases day by day, the mode of generating is diversified, hydropower, thermal electric generation, nuclear power, solar electrical energy generation and generation of electricity by new energy etc., but China's electric power major part is take thermal electric generation as source at present, through the development of more than 100 years, thermal power generating technology is full maturity, it is failure-free power source, but along with the deterioration of earth environment, country is more and more higher to the requirement of environmental protection, energy-saving and emission-reduction, and anti-emission carburetor, zero is polluted the basic demand that has become enterprise development.And thermal electric generation is using fire coal as fuel, except coal-fired, itself environment is had pollution, after burning, produce fly ash and contain the flue gases such as sulfide, environment is made and all become gross pollution, wherein the reasonable actv. utilization of fly ash has become a kind of urgent environmental demands.

After coal-fired power plant burning, produce a large amount of fly ash, fly ash as a kind of building materials and road and bridge material can well recycle, through years development, traditional mode of utilizing generally has two kinds, the first is, build large-area permanent ash, forever stack, this processing mode need to take a large amount of soils, and to carry out impermeable processing to ground, nonetheless coal ash can also can pollute earthing water under the effect of rainwater, airborne dust can pollute surrounding environment, the process Zhong Yehuidui highway of transhipment environment around causes secondary pollution, second method is, be transported to construction of road and bridge building site, pave the way, as roadbed material, or be transported to brick field, do machine made brick, this method needs far away or near transhipment, increases business economic cost, cuts power plant and need to build grey storehouse, also increase the operation cost of electricity power enterprise, in transportation, also can cause dust pollution to surrounding environment.

Summary of the invention

The object of the present invention is to provide a kind of fly ash to collect and carrying method, realize the dry type of fly ash and carry, reduce wet row or the pollution of water punching ash to environment, for follow-up exploitation provide good basis.

For realizing above object, the invention provides a kind of fly ash and collect and carrying method, specifically comprise the steps:

Steps A: the flue gas after boiler combustion enters in dust exhaustor, is collected by dust exhaustor, enters in the ash bucket under dust exhaustor;

Step B: the fly ash in ash bucket enters in the transmitter of air-transport system, when the ash position in transmitter reaches setting value, the charging dome valve of transmitter off entrance;

Step C: by airtight transmitter and pass into pressurized air, make fly ash and pressurized air in transmitter mix and gasify;

Step D: when the pressure in transmitter reaches setting value, open the bleeder valve of transmitter outlet, the fly ash after gasification is discharged from transmitter outlet together with pressurized air;

Step e: when the fly ash in transmitter is discharged, pass into pressurized air as conveying gas at the opposite side of bleeder valve in transfer line;

Step F: in ash transfer, the fly ash after bleeder valve outlet is to gasify by making-up air device carries out tonifying Qi;

Step G: bypass pipe is set on transfer line, when stopping up in pipeline, passes into pressurized air and blow stifled;

Step H: the fly ash in transfer line is transported in grey storehouse continuously by pipeline, in course of conveying, according to the pressure-detecting device on transmitter, monitor delivery pressure, when delivery pressure drops to setting value gradually, close to conveying use gas, tonifying Qi in pipeline and blow stifledly with gas, closing bleeder valve;

Step I: open the charging dome valve blanking of transmitter entrance, enter next circulation.

The raw material of cement needs a large amount of raw grogs, fly ash be good raw material sources, fully actv. utilizes the fly ash that power plant for self-supply or boiler of power plant burning nearby produce, can be delivered in cement line raw material cabin by pipeline, the fly ash that the abundant actv. of the present invention utilizes boiler combustion to produce, by pipeline, be delivered in raw material cabin, this comprehensive application mode is particularly convenient for the power plant for self-supply of cement mill, by convenient, the economic conveying of pipeline, reduce intermediate link, reduced pollution on the environment.

Accompanying drawing explanation

In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is artwork of the present invention;

In figure: 1 ash bucket, 2 compressed air systems, 3 grey storehouses, 4 transmitters, 5 charging dome valves, 6 bleeder valves.

The specific embodiment

For making object, technical scheme and the advantage of the embodiment of the present invention clearer, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.

embodiment 1:

With reference to Fig. 1, the invention provides a kind of fly ash and collect and carrying method, specifically comprise the steps:

Steps A: the flue gas after boiler combustion enters in dust exhaustor, is collected by dust exhaustor, enters in the ash bucket 1 under dust exhaustor;

Step B: the fly ash in ash bucket 1 enters in the transmitter 4 of air-transport system, when the ash position in transmitter 4 reaches setting value, the charging dome valve 5 of transmitter off 4 entrances;

Step C: by airtight transmitter 4 and pass into pressurized air, make fly ash and pressurized air in transmitter 4 mix and gasify;

Step D: when the pressure in transmitter 4 reaches setting value, open the bleeder valve 6 that transmitter 4 exports, the fly ash after gasification is discharged from transmitter 4 outlets together with pressurized air;

Step e: when the fly ash in transmitter 4 is discharged, pass into pressurized air as conveying gas at the opposite side of bleeder valve 6 in transfer line;

Step F: in ash transfer, the fly ash exporting by making-up air device after being to gasify at bleeder valve 6 carries out tonifying Qi;

Step G: bypass pipe is set on transfer line, when stopping up in pipeline, passes into pressurized air and blow stifled;

Step H: the fly ash in transfer line is transported in grey storehouse 3 continuously by pipeline, in course of conveying, according to the pressure-detecting device on transmitter 4, monitor delivery pressure, when delivery pressure drops to setting value gradually, close to conveying use gas, tonifying Qi in pipeline and blow stifledly with gas, closing bleeder valve 6;

Step I: open charging dome valve 5 blankings of transmitter 4 entrances, enter next circulation.

Method of the present invention comprises ash bucket 1, compressed air system 2, sending set, grey storehouse 3 when implementing, the exhausr port of compressed air system 2 connects sending set, sending set comprises transmitter 4, the ash charge mouth of transmitter 4 connects the ash discharging hole of ash bucket 1, the outlet of transmitter 4 connects 3 tops, storehouse, grey storehouse by pipeline, in compressed air system 2, comprise air compressor, drier, air filter, on transmitter 4, be also provided with level-sensing device and pressure transformer, the pipeline that transmitter 4 exports between 3 tops, storehouse, grey storehouse adopts wear-resistant pipe.

In the flue gas producing after boiler combustion, contain a large amount of particulate matters, by rear pass, enter dust exhaustor, particle in flue gas is filtered after absorption by dust collecting fan, be collected in ash bucket 1, by opening the charging dome valve 5 on the transmitter 4 under ash bucket 1, dry ash is fallen in transmitter 4 successively, when being accumulated to certain capacity, by compressed air delivery, in grey storehouse, as cement raw material, recycle.Concrete course of conveying is: close charging dome valve 5, open the pneumatic valve on admission line, utilize pressurized air that the coal ash in transmitter 4 is transported in grey storehouse 3 by ash pipe.There is exhaust gear transmitter 4 tops, in fly ash dropping process, interior transmitter 4 air are entered to ash bucket 1, guarantee that ash is smooth and easy, and ash handing pipeline is provided with bypass companion and blows system, utilizes pressurized air to strengthen and to sweep pressure, prevents that pipeline from stopping up in defeated grey process.Wherein carrying ash pipe is thickening pipeline, and elbow adopts wear-resistant bend, reduces the wearing and tearing of fly ash to pipeline, extends system service life.

The raw material of cement needs a large amount of raw grogs, fly ash be good raw material sources, fully actv. utilizes the fly ash that power plant for self-supply or boiler of power plant burning nearby produce, can be delivered in cement line raw material cabin by pipeline, the fly ash that the abundant actv. of the present invention utilizes boiler combustion to produce, by pipeline, be delivered in raw material cabin, this comprehensive application mode is particularly convenient for the power plant for self-supply of cement mill, by convenient, the economic conveying of pipeline, reduce intermediate link, reduced pollution on the environment.

It should be noted that, in this article, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.

Above embodiment only, in order to technical scheme of the present invention to be described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of various embodiments of the present invention technical scheme.

Claims (1)

1. fly ash is collected and a carrying method, specifically comprises the steps:

Steps A: the flue gas after boiler combustion enters in dust exhaustor, is collected by dust exhaustor, enters in the ash bucket under dust exhaustor;

Step B: the fly ash in ash bucket enters in the transmitter of air-transport system, when the ash position in transmitter reaches setting value, the charging dome valve of transmitter off entrance;

Step C: by airtight transmitter and pass into pressurized air, make fly ash and pressurized air in transmitter mix and gasify;

Step D: when the pressure in transmitter reaches setting value, open the bleeder valve of transmitter outlet, the fly ash after gasification is discharged from transmitter outlet together with pressurized air;

Step e: when the fly ash in transmitter is discharged, pass into pressurized air as conveying gas at the opposite side of bleeder valve in transfer line;

Step F: in ash transfer, the fly ash after bleeder valve outlet is to gasify by making-up air device carries out tonifying Qi;

Step G: bypass pipe is set on transfer line, when stopping up in pipeline, passes into pressurized air and blow stifled;

Step H: the fly ash in transfer line is transported in grey storehouse continuously by pipeline, in course of conveying, according to the pressure-detecting device on transmitter, monitor delivery pressure, when delivery pressure drops to setting value gradually, close to conveying use gas, tonifying Qi in pipeline and blow stifledly with gas, closing bleeder valve;

Step I: open the charging dome valve blanking of transmitter entrance, enter next circulation.

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