CN101619881A - Dedusting system of whole factory building - Google Patents
Dedusting system of whole factory building Download PDFInfo
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- CN101619881A CN101619881A CN200910043693A CN200910043693A CN101619881A CN 101619881 A CN101619881 A CN 101619881A CN 200910043693 A CN200910043693 A CN 200910043693A CN 200910043693 A CN200910043693 A CN 200910043693A CN 101619881 A CN101619881 A CN 101619881A
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Abstract
The invention discloses a dedusting system of a whole factory building, which comprises an air funnel, an air handling unit, a top air-return opening, an air supply pipeline and an air-return pipeline, wherein the air handling unit is arranged outside a workshop, the air funnel is arranged at the lower part of the inner side of the workshop, one end of the air supply pipeline is connected with the air funnel, and the other end of the air supply pipeline is connected with the air handling unit through the air supply pipeline; the top air-return opening is arranged at the top inside the workshop, one end of the air-return pipeline is connected with the top air-return opening and the other end of the air-return pipeline is connected with the air handling unit. The air supply direction of the air funnel is adjusted to change the air distribution of returned air, welding fume with higher temperature drifts upwards under the action of hot buoyancy, the fume further drifts upwards by the push of air sent out from the air funnel and does not move transversely, thereby the welding fume can be avoided from passing through the respiratory zone of the human body; and the fume and harmful gases are sucked into the air handling unit through the air-return pipeline under the suction action of the air-return opening at the top of the workshop and can not be directly removed outdoors, thereby the secondary pollution can not be caused.
Description
Technical field:
The present invention relates to the interior environmental improvement technical field of environmental protection, be specifically related to a kind of dust pelletizing system of the whole factory building flue dust being carried out the udst separation processing.
Background technology:
Welding is a kind of method commonly used of machining; the element of finding in the flue dust in the welding flue gas is nearly more than 20 kinds; workman's operation under the weld fumes environment; as there is not a suitable safeguard measure; various occupational diseases be will cause, and pulmonary edema, bronchitis, acute asthma disease, nervous breakdown and chronic respiratory inflammation etc. also can be caused.For this reason, there is the restriction of a strictness in country to the concentration standard of pollutant under the operating environment, has stipulated the comprehensive dust concentration≤6mg/m in workshop in standard GBZ2-2002
3It is a global technical barrier that weld fumes is administered, and its difficult point shows: 1. the weld fumes particle diameter is little, and its particle diameter is in 0.01～5 μ m, filtering difficulty; 2. welding post polytropy makes weld fumes catch difficulty; 3. weld fumes thermal current retention characteristics, common aeration technology dedusting difficulty; 4. the equipment investment of weldering fume and dust is big, and the operating cost height drops into difficulty.At present, the method commonly used to the improvement of weld fumes has 3 kinds, i.e. labour protection law, local process of cleaning and whole improvement method.
Labour protection law is to allow the operator wear sucting mask, and built-in filter prevents that flue dust from entering human respiratory.This method is simple, but object of protection is only limited to the workman who has sucting mask, and the environment in the workshop can't improve, and wears sucting mask and will influence operating efficiency.
Local process of cleaning is that the air entry of equipment places near the pad with special-purpose weld fumes cleaner, and the flue dust of generation is sucked by the blower fan of cleaner inside, filters the back discharging by filter.This method is applicable to the occasion that welding work pieces is little, welding post is fixing, and can only be at single product dirt pits.When workpiece big, solder joint for a long time, flue dust can not effectively be caught, and equipment occupation space is big.Simultaneously, seizure one's intention as revealed in what one says speed is bigger near the flue dust point, can take the protective gas of CO2 protection weldering away, thereby influence welding procedure.When adopting local dedusting, the operator often needs to move air-breathing arm, is catching effect to reach the most effective flue dust, certainly will influence welding job efficient greatly like this.
One of whole improvement method is to adopt on the roof, workshop or two upper lateral parts installation exhaust blower, because weld fumes is a kind of aerosol, no longer up drift about floating to 6-8 rice eminence, so exhaust blower can only the exclusive segment flue dust, a large amount of flue dust still is collected at top, workshop.The heat in workshop when getting rid of flue dust, has also been got rid of in the workshop that heating is arranged simultaneously in the winter time, causes the significant wastage of the energy.And this in line method is just transferred to flue dust outside the workshop in the workshop, flue dust is not administered, and consequently environment is caused secondary pollution.
Two of whole improvement method is to adopt the blowing and drawing type method, promptly about 5 meters blowing mouth is set highly in workshop one side, adopt jet distribution, air output is big, and the air supply velocity height highly installs back the air port for about 3 meters at the workshop opposite side, the air-flow that blowing mouth blows out is taken away weld fumes and is got rid of to outdoor by return air inlet, this method makes weld fumes move to the return air inlet direction along airflow direction, can not effectively avoid welding cigarette through the human body respiration region, and operating worker still can suck weld fumes.
Three of whole method of administering is to adopt the mode of mixed ventilation to get rid of weld fumes, and its air quantity is big, wind speed is high, for CO
2Gas shielded arc welding when wind speed surpasses 1m/s around the protective gas, can blow away protective gas, thereby influence welding quality.Operation energy consumption is big.
Summary of the invention:
The object of the present invention is to provide and a kind ofly can effectively catch flue dust, energy consumption is low, equipment occupation space is little, can not take the protective gas of CO2 protection weldering away, influences the dedusting system of whole factory building of welding procedure.And the operator do not need to move air-breathing arm yet, influence welding job efficient, and weld fumes can laterally not move to the return air inlet direction along airflow direction in factory building yet, avoids welding cigarette and passes through the human body respiration region; Can to environment not cause secondary pollution when in the workshop, transferring to outside the workshop to flue dust.
The object of the present invention is achieved like this, this dedusting system of whole factory building, comprise air funnel, air-treatment unit, top return air inlet, air supply duct, return air duct, described air-treatment set is outside the workshop, the air funnel device is in the workshop lower inside, and one of air supply duct connects air funnel, the other end connects the air-treatment unit by air supply duct; Top return air inlet device is at the workshop inner top, and one of return air duct connects the top return air inlet, and the other end connects the air-treatment unit.
Because outside factory building, the air funnel device is in the factory building lower inside at described air-treatment set, one of air supply duct connects air funnel, the other end connects the air-treatment unit by air supply duct; Top return air inlet device is at the factory building inner top, and one of return air duct connects the top return air inlet, and the other end connects the air-treatment unit.Utilize layering air-supply principle that weld fumes is caught, be installed on the air funnel of avris bottom, workshop, being installed on the return air inlet at top, workshop and corresponding air supply duct and return air duct finishes flue dust jointly and catches, control system is according to the difference of temperature in wind pushing temperature and the workshop, the air supply direction of regulating air funnel changes the air current composition of air blow and return in the workshop, utilize air funnel with the low wind speed diffuse type air-supply of big air quantity, the higher weld fumes of temperature drifts about to top under the effect of its heat buoyancy, space when the wind of the cleaning that air funnel is sent is filled up the flue dust rising promotes further upwards drift of flue dust, weld fumes can laterally not move to the return air inlet direction in factory building, avoid welding cigarette through the human body respiration region, under the swabbing action of the return air inlet of arranging above the driving of top, workshop, flue dust and pernicious gas that welding is produced are drawn in the air-treatment unit by return air duct, directly do not get rid of to outdoor, thereby it is efficient and don't the operator is produced any operation capture weld fumes and pernicious gas intrusively, the comprehensive dust concentration in workshop can not cause secondary pollution to environment less than the regulation among the standard GBZ2-2002; For local welding flue dust cleaner, the seizure mouth of flue dust also is not interposing at by the product dirt pits, therefore be adapted to when big workpiece welds, produce the big occasion in dirt pits change in location space, do not influence the production efficiency of operating worker, under the effect of this air current composition, form the layering of pollutant in the workshop, it is the Mixed Zone that there are certain pollutant in operating worker cleaning area, residing bottom and top, owing to only guarantee lower area cleaning in the workshop, therefore handled air quantity be half of traditional mixed ventilation form institute required airflow to 1/3rd, the fan operation energy consumption have only the mixed ventilation form half to 1/3rd, the energy saving of system effect is remarkable.Simultaneously, this method has also solved the problem that local cleaner brings space, a large amount of workshop of hold facility.
Description of drawings:
Fig. 1 dedusting system of whole factory building structural representation.
Fig. 2 combination type air is handled the unit structural representation
Fig. 3 air cleaning flow chart
The specific embodiment:
Referring to Fig. 1, Fig. 2, Fig. 3, the 1-workshop, the 2-control system, the 3-combination type air is handled unit, the 4-return air inlet, 5-return air is responsible for, the 6-fresh wind port, the 7-exhaust outlet, the 8-exhaust duct, the 9-air outlet, the 10-blast main, the 11-blowpipe, the 12-air funnel, 13-air-supply balance adjustment valve, 14-top return air inlet, the 15-air returning valve, the 16-exhaust valve, the new air-valve of 17-, the 18-mixer selector valve, the 19-blow valve, 20-pressure fan and motor, the 21-low-temperature plasma purifier, the 22-heater, the 23-surface cooler, the 24-roughing efficiency air filter, 25-return fan and motor, 26-blowback magnetic valve, the 27-filter cylinder, the 28-ash bucket, the 29-Temperature Humidity Sensor, the 30-differential pressure pickup.
This dedusting system of whole factory building, comprise air funnel 12, air-treatment unit 3, return air inlet 4, top return air inlet 14, air supply duct 10, return air duct 5, described air-treatment unit 3 devices are outside workshop 1, air funnel 12 devices are 1 lower inside in the workshop, 10 1 of air supply ducts connect air funnel 12, the other end connects air-treatment unit 3 by air outlet 9, blow valve 19, and a plurality of air funnels 12 can be connected with air supply duct 10 by blowpipe 11; Return air inlet 14 devices are at the factory building inner top, and 5 one of return air ducts connect top return air inlet 14, and the other end connects air-treatment unit 3 by return air inlet 4, air returning valve 15.
The present invention will contain the whole workshop 1 of pollutant (as weld fumes and pernicious gas etc.) as administering object, utilize air funnel 12, adopt layering air-supply technology that flue dust and pernicious gas are collected, 27 pairs of flue dust dust of filter cartridge type high efficiency particulate air filter that combination type air is handled in the unit 3 filter, purify, surface cooler 23,22 pairs of workshop airs of heater carry out temperature humidity control, utilize the aperture of new air-valve 17, exhaust valve 16 and mixer selector valve 18 to regulate control workshop resh air requirement.
Space when the wind of the cleaning that air funnel 12 is sent is filled up the flue dust rising promotes upwards drift of flue dust, under the swabbing action of the top return air inlet of arranging above the driving of top, workshop 14, weld fumes and pernicious gas are drawn in the air-treatment unit 3 by return air duct 5, control system 2 is according to the difference of temperature in wind pushing temperature and the workshop 1, and the air supply direction of regulating air funnel 12 changes the air current composition of air blow and return in the workshop.
Weld fumes purifies and the purification of pernicious gas is to be finished respectively by the high efficiency particulate air filter 27 and the low-temperature plasma purifier 21 of air-treatment unit 3.The air that will contain flue dust and pernicious gas is sent into air-treatment unit 3 by backwind tube 5, purify by filter cartridge type filter 27, be covered with poly tetrafluoroethylene on the filter cylinder surface, the flue dust of energy filtering particle diameter 0.1 μ m, flue dust is adsorbed on the surface of filter cylinder, be provided with differential pressure pickup 30 and detect the inside and outside pressure reduction of filter cylinder, when the pressure reduction of setting is stopped up by flue dust in the filter cylinder surface,, blow out by the filter cylinder inboard by blowback magnetic valve 26 abrupt release compressed air, dust such as flue dust are blown off, drop in the ash bucket 28.Be discharged in the atmosphere through exhaust duct 8 through the air part after filtering, satisfy atmosphere pollutants emission standards, solved the secondary environmental pollution problem that direct discharging brings, after passing through mixer selector valve 18 and new wind mixes, a part sends into again in the workshop 1, pernicious gas such as ozone, hydrogen fluoride etc. adopt low-temperature plasma purifier 21 to purify, and are sent to after the purification in the workshop 1; Native system has guaranteed that room air can circulate owing to adopted high efficiency particulate air filter.For the workshop 1 that heating is arranged winter, because the gas behind high efficiency filter satisfies indoor discharge standard, return air after purifying after filtration returns in the workshop 1 through mixer selector valve 18, heat continues to get back in the workshop, that avoids that direct discharging modes bring also drains the problem of workshop heat when draining pollutant, thereby has solved the problem that direct discharging causes the workshop heat energy loss; Native system combines workshop temperature, humidity control with dedusting.For aluminium alloy welding workshop, the humidity that requires workshop air is less than 60%, to guarantee welding quality.Surface cooler 23 and heater 22 are installed in the air-treatment unit, workshop 1 air are dehumidified by freezing method; Native system satisfies the demand of workshop to resh air requirement, be under the air-tight state in workshop 1, workshop 1 air quality can constantly descend, for guaranteeing the requirement of plant working workman resh air requirement, on air-treatment unit 3, be provided with new air-valve 16, under different operating modes, regulate the aperture of new air-valve 16 automatically, under summer workshop cold supply, dehumidification operating mode, the aperture of new air-valve 16 changes with the outdoor environment humiture, outdoor temperature humidity is high more, new air-valve 16 apertures are more little, thereby reduce the energy consumption of system handles new wind load, also guarantee the demand of minimum fresh air requirmente simultaneously; Native system is controlled system automatically by the control software of special use.In control system 2, adopt programmable controller, the major control content comprises: the air supply direction of regulating air funnel 12 is realized the dedusting air current composition; Differential pressure pickup 30 detects the pressure reduction of filter cylinder import and outlet, regulates the blowback time and the blowback interval of blowback magnetic valve 26 according to pressure reduction; The aperture of the hot water control valve of the cold water control valve of control table cooler and reheater (being heater) is regulated wind pushing temperature and humidity; Wind pushing temperature when the hot water control valve control of adjusting heater is heated; According to outdoor temperature humidity, regulate the aperture of new air-valve 17 and exhaust valve 16, mixer selector valve 18, guarantee the supply of resh air requirement.
Claims (1)
1. dedusting system of whole factory building, comprise air funnel, air-treatment unit, top return air inlet, air supply duct, return air duct, it is characterized in that: described air-treatment set is outside the workshop, the air funnel device is in the factory building lower inside, and one of air supply duct connects air funnel, the other end connects the air-treatment unit by air supply duct; Top return air inlet device is at the workshop inner top, and one of return air duct connects the top return air inlet, and the other end connects the air-treatment unit by return air duct.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100436931A CN101619881B (en) | 2009-06-16 | 2009-06-16 | Dedusting system of whole factory building |
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| CN2009100436931A CN101619881B (en) | 2009-06-16 | 2009-06-16 | Dedusting system of whole factory building |
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| CN101619881A true CN101619881A (en) | 2010-01-06 |
| CN101619881B CN101619881B (en) | 2011-10-05 |
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