WO2023088108A1 - Système et procédé de collecte et d'épuration de fumées de soudage d'atelier de structure en acier - Google Patents

Système et procédé de collecte et d'épuration de fumées de soudage d'atelier de structure en acier Download PDF

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Publication number
WO2023088108A1
WO2023088108A1 PCT/CN2022/129889 CN2022129889W WO2023088108A1 WO 2023088108 A1 WO2023088108 A1 WO 2023088108A1 CN 2022129889 W CN2022129889 W CN 2022129889W WO 2023088108 A1 WO2023088108 A1 WO 2023088108A1
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WIPO (PCT)
Prior art keywords
steel structure
dust removal
roof
dust
workshop
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PCT/CN2022/129889
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English (en)
Chinese (zh)
Inventor
冯国增
韩罡
许津津
栾付君
周伟明
朱金堂
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江苏科技大学
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Publication of WO2023088108A1 publication Critical patent/WO2023088108A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
    • B03C3/017—Combinations of electrostatic separation with other processes, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H5/00—Buildings or groups of buildings for industrial or agricultural purposes
    • E04H5/02—Buildings or groups of buildings for industrial purposes, e.g. for power-plants or factories
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust

Definitions

  • the invention relates to the field of purification of welding smoke and dust pollution in large-scale steel structure workshops, specifically a welding smoke dust collection and purification system and working method in large-scale steel structure workshops, belonging to the technical field of air purification.
  • the large-scale steel structure welding workshop mainly adopts the dust reduction method of natural ventilation + roof exhaust. Although this method is very practical, there are many problems:
  • An axial flow fan is installed in the workshop to discharge the welding fume out of the workshop in an unorganized manner.
  • the effect of ventilation and dust removal is very unsatisfactory, and it is difficult to meet the concentration limit requirements of the factory boundary monitoring points in the "Comprehensive Emission Standard of Air Pollutants".
  • the dust reduction method of induced jet fan + roof exhaust fan is adopted, the induced jet fan entrains the surrounding air, and moves forward along the horizontal inclination angle of 45°, which can break the stranded smoke layer at the height of 6-8m in the middle of the workshop and force the airflow to the roof
  • the fixed local exhaust and dust reduction method can generally only be used for small workpieces and point-to-point operations to eliminate welding fume from the source. It is mainly used in welding production workshops with relatively fixed workplaces and personnel, which cannot meet the requirements for welding large workpieces. Dispersed, complex and ever-changing process requirements for solder joint distribution.
  • Electrostatic precipitator technology is gradually widely used in the purification and collection system of welding fume.
  • the electrostatic precipitator plate is used as the core component, and most of them are metal plates. If the existing electrostatic precipitator is directly used to install it in a public place, the exposed metal mesh or metal plate has high voltage, and it is easy to discharge to generate ozone, which shortens the service life of the electrostatic precipitator.
  • the purpose of the present invention is to provide a welding fume collection and purification system and working method for large-scale steel structure workshops, which can seriously affect the working environment of welders and endanger the health of workers in large-scale steel structure workshops. Effectively collect and purify harmful fine particles and prevent the diffusion of high-concentration pollutants. It has the advantages of systematization, low energy consumption, flexible layout, good trapping effect, and high purification and dust removal efficiency.
  • a welding fume collection and purification system for a steel structure workshop including a local dust removal device and a roof electrostatic dust removal ventilator, a plurality of the local dust removal devices are arranged in the welding area of a large the top of the structure workshop;
  • the local dust removal device includes a dust collection hose, a barrel body, and an exhaust pipe.
  • the barrel shell has a built-in positive pressure fan and an openable filter device.
  • the dust collection hose is connected to the positive pressure fan, and the exhaust pipe is connected to the openable filter. device;
  • the roof electrostatic dust removal ventilator includes a negative ion generator, a metal dust collecting pole, a corona pole, a bracket, and a supporting frame.
  • the bracket is placed on the roof of a large steel structure workshop to form a gas guiding structure, and the negative ion generator is set in the bracket. At the bottom, there are through holes distributed on the negative ion generator. The gas in the large steel structure workshop rises through the negative ion generator.
  • Several metal dust collecting electrodes and corona electrodes are arranged on the negative ion generator in the bracket.
  • the support frame is installed at the top of the bracket, the brackets on both sides of the bracket are provided with water tanks, the support frame is provided with a rain shield, the rain shield guides rainwater into the water tank, and the water tank has a communication Gas channels inside and outside the stent.
  • the filter screen is made of nanofiber coated filter material
  • the air inlet of the dust collecting hose is provided with a dust suction head with a flame arrester.
  • the barrel is arranged on the box, the bottom of the box has a box base, the box base has universal wheels, the box is also provided with a push handle, and the box has a built-in first battery and a charging coil.
  • the exhaust pipe discharges gas toward the top of the large steel structure workshop, and the height of the exhaust pipe is 2 meters.
  • the large-scale steel structure workshop has a built-in second battery and high-voltage power supply.
  • the surface of the rain shield is covered with solar panels.
  • the wire connects the corona pole.
  • a purification method for a welding fume collection and purification system in a steel structure workshop comprising the following steps:
  • Step 1 Move the local dust removal device to the corresponding welding position by manipulating the push handle and the universal wheel, adjust the dust collection hose, align the dust suction head with the welding operation point, and turn on the motor, the positive pressure fan rotates, and the dust is collected A negative pressure area is formed at the head. Under the action of negative pressure, the welding fume passes through the flame arrester to block the welding sparks. It first enters the filter screen on the upper part of the filter device through the dust collection hose to separate the submicron dust, and finally it is absorbed by activated carbon. The filter absorbs the frivolous objects, and the clean exhaust air after filtration and purification is discharged to the middle of the workshop through the vertical exhaust pipe to dilute the smoke in the welding fume stagnation area;
  • Step 2 When charging is required, just move the local dust removal device above the external charger, and the charger will charge the first battery through the charging coil without wiring;
  • Step 3 The welding fumes escaping outside the negative pressure area of the suction head, under the guidance of the clean exhaust of the vertical exhaust pipe, break through the soot stagnation area in the middle of the workshop, continue to move to the upper part of the large steel structure workshop, and enter the static electricity on the roof.
  • Negative ion generator for dust removal ventilator
  • Step 4 Start the roof electrostatic dust removal ventilator.
  • the solar panel converts solar energy into electrical energy and stores it in the second battery. At the same time, it continuously provides working voltage for the metal dust collecting electrode and the negative ion generator. Particles are pre-charged, and a high voltage is applied between the metal dust collecting electrode and the corona electrode to form a high voltage electric field. Under the action of the potential between the metal dust collecting electrode and the corona electrode, the charged particles gather to the metal dust collecting electrode, and the static electricity In principle, the diluted welding fume is finally purified and dedusted by the roof electrostatic precipitator ventilator for a second time, and finally discharged from the large steel structure workshop.
  • the present invention has the following advantages and beneficial effects:
  • the local dust removal device is flexible and adjustable, and the welding fume is purified for the first time, effectively reducing the concentration of harmful gas and smoke at the welding work point.
  • the local dedusting device provided by the present invention makes full use of the exhaust air after purification, and sends it directly into the middle of the welding workshop through the vertical exhaust pipe, so as to accelerate the rising of the high-temperature harmful gas in the welding workshop, and the upward movement breaks through the soot retention layer, thereby effectively diluting Pollutant concentrations in the middle of a large welding workshop.
  • the user can move the industrial vacuum cleaner above the external wireless charger to charge the battery without wiring, thereby achieving the effect of improving work efficiency.
  • the roof electrostatic dust removal ventilator provided by the present invention makes full use of the large temperature difference and pressure difference between the inside and outside of the welding workshop, that is, the "chimney effect”. great economic benefits.
  • the collection effect is good, the negative ion generator generates negative ions, avoids the generation of ozone, pre-charges the dust particles, and the charged particles gather to the dust collection electrode under the action of the potential between the dust collection plate and the corona electrode, and then It is captured and has high dust removal efficiency.
  • Fig. 1 is a schematic diagram of the installation structure of the external part of the present invention
  • Fig. 2 is the structural form figure of local dedusting device described in the present invention.
  • Fig. 3 is the front view of the roof electrostatic precipitator ventilator of the present invention.
  • Fig. 4 is the installation schematic diagram of metal dust collection pole, corona pole, negative ion generator of the present invention
  • Fig. 5 is the structure figure of roof electrostatic precipitator ventilator described in the present invention.
  • Reference signs are: A—partial dust removal device, B—roof electrostatic dust removal ventilator, C—workshop, 1—box base, 2—box, 3—barrel, 4—positive pressure fan, 5—openable Filtration device, 6—filter screen, 7—activated carbon adsorption absorber, 8—universal wheel, 9—first battery, 10—charging coil, 11—dust collection hose, 12—push handle, 13—exhaust pipe, 14 - vacuum head, 15 - flame arrester, 16 - base, 17 - bracket, 18 - rain shield, 19 - support frame, 20 - water tank, 21 - solar panel, 22 - second battery, 23 - metal set Dust pole, 24—corona pole, 25—negative ion generator, 26—high voltage power supply, 27—roofing.
  • a welding fume collection and purification system for a large steel structure workshop including a local dust removal device A, a roof electrostatic dust removal ventilator B, and a large steel structure workshop C.
  • the local dust removal device A is installed at the welding station inside the workshop C
  • the roof electrostatic dust removal ventilator B is installed on the roof of the workshop C, perpendicular to the roof ridge and arranged in parallel.
  • the local dust removal device A includes a box base 1, a box body 2, a barrel body 3, an openable filter device 5, universal wheels 8, The first accumulator 9, the charging coil 10, the dust collection hose 11, the push handle 12, the exhaust pipe 13, the dust suction head 14, and the flame arrester 15.
  • the bottom of the box base 1 is provided with universal wheels 8, the top is provided with a box 2, the inside of the box 2 is provided with a first storage battery 9, and one end of the box 2 is connected with the exhaust pipe 13, and the height of the exhaust pipe 13 is 2 meters, and the exhaust outlets are arranged vertically upwards.
  • One end and the other end of the box body 2 are provided with a push handle 12, the bottom of the box body 2 is provided with a charging coil 10, the upper part is provided with a barrel body 3, the inside of the barrel body 3 is provided with a fan 4 and an openable filter device 5, and the upper part of the openable filter device 5 is A filter screen 6 made of nanofiber-coated filter material is set, which can separate submicron dust; an activated carbon adsorber 7 is arranged at the bottom of the openable filter device 5, and the upper part of the open filter device 5 is sequentially connected with the dust collection hose 11, The dust suction head 14 and the flame arrester 15 are connected.
  • the roof electrostatic dust removal ventilator B includes a box base 16, a bracket 17, a rain shield 18, a support frame 19, a water tank 20, and a solar cell Plate 21, second storage battery 22, metal dust collecting pole 23, corona pole 24, negative ion generator 25, high voltage power supply 26.
  • the box base 16 is fixed on the roof 27 by high-strength bolts
  • the support frame 19 is fixed on the bracket 17 by self-tapping screws
  • the bracket 17 is welded on the box base 17
  • the rain shield 18 is fixed on the roof by self-tapping screws.
  • a flow tank 20 is installed at both ends of the support frame 19, and one end of the second storage battery 22 is connected to the solar cell panel 21 through a low-voltage insulated wire, and the other end is respectively connected to the metal dust collecting electrode 23 through a low-voltage insulated wire.
  • Connect with the negative ion generator 25, and the negative ion generator 25 is fixed on the casing base 16 by self-tapping screws.
  • the solar panel 21 of the roof electrostatic dust removal ventilator B is bonded to the outside of the rain shield 18 through silica gel, and the solar panels 21 are connected in parallel connected to convert solar energy into electrical energy and store it in the second storage battery 22 to provide working voltage for the metal dust collecting electrode 23 and negative ion generator 25 .
  • the anion generator 25 of the roof electrostatic precipitator ventilator B discharges a large dose of high-purity negative oxygen ions by loading a weak current, avoiding ozone generation, and the direction of the free electron flow released by the welding fume hot airflow and the anion generator is consistent.
  • the metal dust collection pole 23 of the roof electrostatic dust removal ventilator B is a flat plate structure, the upper end is fixed on the support frame 19, and the lower end is vertically fixed on the negative ion generator 25.
  • the corona pole 24 of the roof electrostatic dust removal ventilator B is a flat plate structure, and the corona pole 24 is arranged in parallel with the metal dust collecting pole 23.
  • the upper end of the corona pole 24 is fixed on the support frame 19, and the lower end is vertically fixed on the negative ion generator.
  • the corona electrode 24 and the high-voltage power supply 26 are connected in parallel through a high-voltage insulated wire.
  • Step A Move the local dust removal device A to the corresponding welding position by manipulating the push handle 12 and the universal wheel 8, adjust the dust collection hose 11, align the dust suction head 14 with the welding operation point, and turn on the motor, and the fan 4 rotates , a negative pressure area is formed at the dust suction head 14. Under the action of negative pressure, the welding fume passes through the flame arrester 15 to block the welding sparks, and first enters the filter screen 6 on the upper part of the filter device 5 through the dust collection hose 11.
  • the dust is separated, and finally through the activated carbon adsorber 7, the frivolous matter is adsorbed, and the clean exhaust air after filtration and purification is discharged to the middle of the workshop through the vertical exhaust pipe 13 to dilute the soot concentration in the welding fume stagnation area.
  • the openable filter device 5 is regularly cleaned of dust.
  • Step B When charging is required, just move the local dust removal device A above the external charger, and the charger will charge the first storage battery 9 through the charging coil 10 without wiring, thereby improving work efficiency.
  • Step C The welding fume escaping from the local dust removal device A, under the guidance of the clean exhaust of the vertical exhaust pipe 13, breaks through the soot stagnation area, continues to move to the upper part of the large steel structure workshop C, and enters the electrostatic dust removal ventilator B on the roof negative ion generator 25.
  • Step D start the roof electrostatic dust removal ventilator B, the solar panel 21 converts solar energy into electric energy and stores it in the second storage battery 22, and simultaneously provides the working voltage continuously for the metal dust collecting pole 23 and the negative ion generator 25, and the negative ion generator 25 generates Free electrons pre-charge the particles in the dust, and a high voltage is applied between the metal dust collecting electrode 23 and the corona electrode 24 to form a high voltage electric field, and the charged particles are under the action of the potential between the metal dust collecting electrode 23 and the corona electrode 24 , gather to the metal dust collecting pole 23. Under the electrostatic principle, the diluted welding fume is finally purified and dusted by the roof electrostatic dust collector ventilator B for the second time, and finally discharged from the large steel structure workshop C.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrostatic Separation (AREA)

Abstract

La présente invention concerne un système et un procédé de collecte et d'épuration de fumées de soudage d'atelier de structure en acier. Le système comprend des dispositifs locaux d'élimination de poussière et des ventilateurs d'élimination de poussière électrostatique de toit ; lesdits ventilateurs d'élimination de poussière électrostatique de toit sont disposés sur un toit d'un grand atelier de structure en acier, et des électrodes de collecte de poussière métallique et des électrodes corona sont perpendiculaires à une arête du toit et sont disposées en parallèle ; et les dispositifs locaux d'élimination de poussière sont disposés au niveau de stations de soudage à l'intérieur de l'atelier. Les dispositifs locaux d'élimination de poussière selon la présente invention sont souples et ajustables, et collectent et épurent les fumées de soudage une première fois ; en même temps, de l'air d'échappement épuré sert de puissance d'alimentation en air de remplacement devant être introduite dans l'environnement de l'atelier, de telle sorte que les fumées qui sont davantage diluées se rompent à travers une couche de rétention de fumées pour continuer à se déplacer vers le haut ; et les fumées de soudage dans l'atelier sont ensuite collectées et épurées secondairement au moyen des ventilateurs d'élimination de poussière électrostatique de toit proposés dans la présente invention.
PCT/CN2022/129889 2021-11-22 2022-11-04 Système et procédé de collecte et d'épuration de fumées de soudage d'atelier de structure en acier WO2023088108A1 (fr)

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