CN105457489A - Casting waste gas treatment method and device - Google Patents
Casting waste gas treatment method and device Download PDFInfo
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- CN105457489A CN105457489A CN201610015469.1A CN201610015469A CN105457489A CN 105457489 A CN105457489 A CN 105457489A CN 201610015469 A CN201610015469 A CN 201610015469A CN 105457489 A CN105457489 A CN 105457489A
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- collecting hood
- air draught
- waste gas
- draught collecting
- gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/80—Employing electric, magnetic, electromagnetic or wave energy, or particle radiation
- B01D2259/818—Employing electrical discharges or the generation of a plasma
Abstract
The invention relates to the technical field of casting waste gas treatment, and particularly provides a casting waste gas treatment method and device. The method comprises the steps that waste gas generated on a casting production line is collected through air suction collection covers; collected waste gas is gathered and conveyed to a low-temperature plasma and compound photocatalysis industrial waste gas purifier through a pipeline to be treated; the treated gas is exhausted into the atmosphere. The casting waste gas treatment device comprises the air suction collection covers, the waste gas collection pipeline, the low-temperature plasma and compound photocatalysis industrial waste gas purifier and a main fan. The multiple air suction collection covers are arranged on the casting production line according to the number of waste gas sources in casting production and communicated with the gas inlet end of the waste gas collection pipeline. The gas outlet end of the waste gas collection pipeline is communicated with a gas inlet of the purifier. A gas outlet of the purifier is communicated with the atmosphere through an exhausting device. The purpose that smoke and organic waste gas are collected and treated in the casting process is achieved, and the problem that an existing treatment technology of existing waste gas casting treatment through a wet method is complex is solved.
Description
Technical field
The present invention relates to casting technical field of waste gas treatment, in particular to one casting waste gas processing method and device.
Background technology
As everyone knows, a large amount of cigarettes, dirt and hot gas can be produced in foundry production, especially in equipment manufacture, more common coated sand is adopted at present, in coremaking and high temperature casting process, volatilization and a large amount of multiple organic matter with peculiar smell such as formaldehyde, phenols, amine of cracking especially, these poisonous and hazardous gases are not only degrading production environment, more cause serious pollution to the air of plant area's periphery, effectively must administer, guarantee to reach national relevant emission standards.Existing casting exhaust-gas treatment adopts wet-treating usually.And wet-treating casting waste gas often brings extra water treatment problems, make enterprise be difficult to accept because general machine-building processing enterprise all might not have complete sewage treatment equipment (except the industries such as plating), therefore there is the problem of complex treatment process.
Summary of the invention
The object of the present invention is to provide a kind of casting waste gas processing method and device.To improve the problem that the complex treatment process that waste gas exists is cast in existing wet-treating.
The present invention is achieved in that
A kind of casting waste gas processing method, comprises the following steps:
The collection of waste gas: the waste gas that foundry production line produces is collected by air draught collecting hood;
The purified treatment of waste gas: the described waste gas collected is gathered by pipeline and is delivered to low-temperature plasma+composite photocatalyst industrial waste gas purification device process;
The discharge of purified gas: the gas from gas tapping equipment after described low-temperature plasma+composite photocatalyst industrial waste gas purification device process is disposed in air.
Further, above-described one casting waste gas processing method, described waste gas comprises the mechanization pouring product line on foundry production line, ground hand dropping is on-the-spot, the waste gas that smelting furnace produces, waste gas on described mechanization pouring product line adopts fixed air draught collecting hood, rotary air draught collecting hood, portable air draught collecting hood or rotary air draught collecting hood are collected, the waste gas that hand dropping production scene, described ground produces adopts the portable air draught collecting hood of strip to collect, the waste gas produced in described smelting furnace adopts rotary air draught collecting hood to collect.
By carrying out exhaust-gas treatment all sidedly to the multiple production areas on foundry production line, make exhaust-gas treatment more comprehensively, better effects if, simultaneously, different air draught collecting hoods is adopted to carry out the collection of waste gas for different production technology districts, make the collecting effect of waste gas better, meanwhile, the cleaning of waste gas is also more thorough.
A kind of casting emission-control equipment implementing above-mentioned casting waste gas processing method, comprise air draught collecting hood, gas sampling pipeline, low-temperature plasma+composite photocatalyst industrial waste gas purification device, gas discharging apparatus, described air draught is collected and is covered with multiple and is arranged on described foundry production line, described multiple air draught collecting hood is all communicated with the inlet end of described gas sampling pipeline, the outlet side of described gas sampling pipeline is communicated with the air inlet of described low-temperature plasma+composite photocatalyst industrial waste gas purification device, the gas outlet of described low-temperature plasma+composite photocatalyst industrial waste gas purification device is communicated with the air inlet of described gas discharging apparatus, the gas outlet of described gas discharging apparatus is communicated with air.
Complete above-mentioned waste gas processing method by above-mentioned device, above-mentioned waste gas processing method can be implemented well, and this apparatus structure is simple, is convenient to install and use in plant area, and has security performance preferably.
Further, above-described casting emission-control equipment, described multiple air draught collecting hood comprises multiple first air draught collecting hood, multiple second air draught collecting hood, multiple 3rd air draught collecting hood, described multiple first air draught collecting hood is arranged on mechanization pouring product line, described multiple second air draught collecting hood is arranged at hand dropping production scene, ground, and described 3rd air draught collecting hood is arranged at smelting furnace scene.
By arranging multiple air draught collecting hood respectively at mechanization pouring product line, hand dropping production scene, ground, smelting furnace scene respectively, waste gas to whole foundry production line produces comprehensively is collected, thus concentrate process, this mode makes farthest to the air pollution reducing plant area and surrounding enviroment, thus reaches good environment protecting.
Further, above-described casting emission-control equipment, described first air draught collecting hood is fixed air draught collecting hood, rotary air draught collecting hood, portable air draught collecting hood or rotary air draught collecting hood, and described fixed air draught collecting hood is generally positioned at the top of pour point position; Described flip-shell air draught collecting hood is arranged at the side of casting mold, and described flip-shell air draught collecting hood states casting mold by upset from closed upper part residence.Described portable air draught collecting hood is arranged according to pouring position feature, and can meet the needs of casting mold replacing: whiz casting mold during described rotary air draught collecting hood casting pouring, covers casting mold after cast in foundry goods waste gas production process.The whiz mould of pickup (or more mold exchange), and automatic switch valve is set.
By above-mentioned vibrational power flow, make it possible to be fixed the flip-shell air draught collecting hood on mechanical pouring product line, the operations such as upset or rotation, after casting mold upper molten metal, flip formula air draught collecting hood aspirates the waste gas produced, and there is certain seal, can farthest aspirate waste gas, reach best suction effect, when needing to pour into a mould, can move, upset or rotation (now exhausting valve cuts out automatically) air draught collecting hood, make it the side being in casting mold, expose plug hole, pouring operation can be carried out.This structure is simple and convenient, can handled easily well.
Further, above-described casting emission-control equipment, described second air draught collecting hood is the portable air draught collecting hood of strip, the portable air draught collecting hood of described strip comprises cuboid cover body, tube connector, described cuboid cover body is by tube connector and the described gas sampling pipeline communication being embedded in underground in advance, described tube connector and described gas sampling pipeline removably connect, described cuboid cover body is provided with the SS coordinated with multiple workshop sections positions, and described cuboid cover body can relative to ground moving.Site setting is multiple renovates according to cast for cover body, opens, cover during casting complete during pouring operation, keeps aspirating in high-temperature gas production process thereafter together with whole cover body.
Collecting hood is designed to packaged type, makes more convenient to operate, cast and to producing after cigarette aspiration procedure completes subsequently, then air draught collecting hood is moved to contiguous workshop section position and carry out suction operation.Because multiple workshop sections position forms linear production line by rows, therefore, the second air draught collecting hood of setting is the portable air draught collecting hood of strip, can carry out suction operation to a production line simultaneously, make whole operation more simple and convenient, also simplify pipeline configuration.Second tube connector of air draught collecting hood setting and removably connecting of gas sampling pipeline, make the second air draught collecting hood can carry out pipeline connection at the second air draught collecting hood again when moving to workshop section side, position, thus be convenient to the movement of whole second air draught collecting hood.
Further, above-described casting emission-control equipment, the bottom of described cuboid cover body is provided with pulley, and described ground is provided with the slide rail coordinated with described pulley.
By the mode that the pulley of above-mentioned setting coordinates with slide rail, realize the movement of the second air draught collecting hood, frictional force is smaller, and make the movement of the second air draught collecting hood convenient, operating efficiency is higher.
Further, above-described casting emission-control equipment, described 3rd air draught collecting hood is rotary air draught collecting hood, described 3rd air draught collecting hood is arranged at the side of described smelting furnace, the cover mouth down of described 3rd air draught collecting hood, described 3rd air draught collecting hood is connected with ground by bracing frame, and described 3rd air draught collecting hood and support frame as described above are rotationally connected, the cover mouth of described 3rd air draught collecting hood can turn to described smelting furnace top and just to the fire door of described smelting furnace.
The waste gas that smelting furnace produces is that the fire door above smelting furnace is discharged, and therefore, needs the waste gas to fire door produces to collect.Simultaneously, the reinforced of smelting furnace also adds from fire door, by above-mentioned vibrational power flow, 3rd collecting hood can be rotated relative to bracing frame, thus when needing reinforced, the cover mouth of the 3rd collecting hood is horizontally rotated on one side, again cover mouth is turned to the upper Founder of smelting furnace after having fed in raw material to fire door, the waste gas that smelting furnace produces is aspirated, reach best suction effect, and this rotary air draught collecting hood design is ingenious, structure is simple, be convenient to install and operation, the waste gas that can realize well smelting furnace produces aspirates, thus reach the object of smelting furnace exhaust-gas treatment.
Low-temperature plasma+composite photocatalyst industrial waste gas purification device in casting emission-control equipment comprises pretreatment unit (cold wind interference), low-temperature plasma unit and photodissociation composite photocatalyst unit etc., described device can not only effectively be degraded the flue dust produced in casting process, and the organic exhaust gas produced in (phenolic resins) precoated sand casting process can be decomposed, realize the qualified discharge of the rear gas of purification.
Further, above-described casting emission-control equipment, described gas discharging apparatus comprises main air blower, exhaust chimney, the air inlet of described main air blower is communicated with the gas outlet of described low-temperature plasma+composite photocatalyst industrial waste gas purification device, the gas outlet of described main air blower is communicated with described exhaust chimney, and the outlet side of described exhaust chimney is stretched out outside factory building.
By above-mentioned vibrational power flow, make to produce to whole waste gas collecting system the suction force determined by main air blower, meanwhile, and the gas from low-temperature plasma+composite photocatalyst industrial waste gas purification device after process can be discharged well.And by the setting of chimney, make it possible to directly purified gas is discharged in the air of plant area's eminence by regulation.
Further, above-described casting emission-control equipment, also comprise flammable gas alarm device, described flammable gas alarm device comprises detector, alarm controller, described detector is connected with described alarm controller, described alarm controller is connected with described low-temperature plasma+composite photocatalyst industrial waste gas purification device, and described detector is installed on the place of Leakage Gas.
Above-mentioned setting, when the detector detector be installed on low-temperature plasma+composite photocatalyst industrial waste gas purification device import Qian Guan road perceives the steam of combustible gas or flammable volatilization, detector detection signal is sent to alarm control unit immediately by cable, controller demonstrates gas concentration, when exceeding the alarm concentration value of setting, namely alarm controller sends sound, visual alarm export coordinated signals signal, controls the shutdown of whole device, thus ensure safety, avoid accident to occur.
The beneficial effect that the present invention realizes: the waste gas produced in whole casting production process is collected by carrying out installing air draught collecting hood on foundry production line all sidedly, and the waste gas of collection is gathered, purified treatment is carried out by low-temperature plasma+composite photocatalyst industrial waste gas purification device, and reach treatment effect well, the method of this casting exhaust-gas treatment is simple, corresponding intrument structure is simple, be convenient to install and use, and there is treatment effect well, thus efficiently solve the casting process flue dust such as (particularly phenolic resins precoated sand casting) and organic exhaust gas is collected and a difficult problem for process, and improve existing wet-treating and cast complex treatment process that waste gas exists casts the complex treatment process of waste gas existence problem to the problems such as organic degradation effect and not good and secondary pollution generation and existing wet-treating.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, be briefly described to the accompanying drawing used required in embodiment below, be to be understood that, the following drawings illustrate only some embodiment of the present invention, therefore the restriction to scope should be counted as, for those of ordinary skill in the art, under the prerequisite not paying creative work, other relevant accompanying drawings can also be obtained according to these accompanying drawings.
The structural representation of the casting emission-control equipment that Fig. 1 provides for embodiments of the invention.
Reference numeral gathers: air draught collecting hood 100; First air draught collecting hood 110; Second air draught collecting hood 120; 3rd air draught collecting hood 130; Gas sampling pipeline 200; Low-temperature plasma+composite photocatalyst industrial waste gas purification device 300; Gas discharging apparatus 400; Main air blower 410; Exhaust chimney 420; Casting mold 500; Workshop section position 600; Smelting furnace 700; Bracing frame 800; Flammable gas alarm device 900.
Detailed description of the invention
Also by reference to the accompanying drawings the present invention is described in further detail below by specific embodiment.
A kind of casting waste gas processing method, comprises the following steps:
The first step, is collected the waste gas that foundry production line produces by air draught collecting hood.
Further, in the present embodiment, waste gas comprises the waste gas that mechanization pouring product line on foundry production line, ground hand dropping are on-the-spot, smelting furnace produces, waste gas on mechanization pouring product line adopts flip-shell air draught collecting hood to collect, the waste gas that hand dropping production scene, ground produces adopts the portable air draught collecting hood of strip to collect, and the waste gas produced in smelting furnace adopts rotary air draught collecting hood to collect.
By carrying out exhaust-gas treatment all sidedly to the multiple production areas on foundry production line, make exhaust-gas treatment more comprehensively, better effects if, simultaneously, different air draught collecting hoods is adopted to carry out the collection of waste gas for different production technology districts, make the collecting effect of waste gas better, meanwhile, the cleaning of waste gas is also more thorough.Being carried out focusing on by the waste gas of collection also makes whole process more simplify, and cost is lower.
Second step, is gathered by the described waste gas collected by pipeline and is delivered to low-temperature plasma+composite photocatalyst industrial waste gas purification device and process.Waste gas sucks in subtube by the air draught collecting hood namely arranged by each production area, is delivered to total pipeline and is delivered in low-temperature plasma+composite photocatalyst industrial waste gas purification device again and processes.
Low-temperature plasma+composite photocatalyst industrial waste gas purification device, its cleaning principle is low-temperature plasma+composite photocatalyst, and this method is the degradation technique with international most advanced level according to the large discharge produced aborning, the original creation of low-concentration organic exhaust gas feature.
Under the effect of extra electric field, what medium discharge produced takes in a large number and can bombard contaminant molecule by electronics, make it ionize, dissociation and exciting, then the physics of series of complex, chemical reaction is caused, complicated macromolecule contaminant is made to change simple Small molecular safe material into, or make poisonous and harmful substance change the nontoxic or low harmful substances of low toxicity into, thus pollutant is degraded removal.Because the averaged electron energy produced after its ionization is at 1eV ~ 10eV, suitably controls reaction condition and can realize making the chemical reaction being generally difficult to realize or speed is very slow become very quick.
Adopt double-dielectric barrier discharge technology, belong to dry process, without any need for adsorbent, catalyst and other any combustion-supporting fuel, only need adopt 380V alternating current, high-frequency impulse electric field is obtained through oscillation boosting device, produce high-energy electron, stench, poisonous gas molecule in bombardment waste gas decomposition.There is safe and reliable, simple to operate, the feature such as operating cost is low, governance efficiency is high, advanced technology.
The main component of " photocatalyst " (also referred to as " photochemical catalyst ") is nano-scale anatase titanium dioxide (TiO
2), at room temperature, when wavelength is mapped on Nano titanium dioxide particle at the ultraviolet lighting of below 380nm, the electronics of valence band excite by ultraviolet light, transit to conduction band and form free electron, and form the hole of a positively charged in valence band, so just form electron-hole pair.Utilize the oxidation in hole and the reducing power of free electron that produce, the H of titanium dioxide and surface contact
2o, O
2react, produce the extremely strong free radical of oxidizing force, the nearly all organic substance of these free radical decomposable asymmetric choice net, the hydrogen (H) contained by it and carbon (C) are become water and carbon dioxide.
" low-temperature plasma+composite photocatalyst " is the degradation technique with international most advanced level according to the original creation of industrial organic exhaust gas feature, its core first produces high-energy electron with low temperature plasma, the pernicious gas factor in all kinds of organic exhaust gas of Direct Resolution, makes its degraded generation CO rapidly
2, H
2o and on a small quantity other low molecular compounds, the effect of recycling photocatalyst, degraded not yet completes all kinds of pernicious gases of degraded, the electromagnetic wavelength that this technology produces when also taking full advantage of double-dielectric barrier discharge and special ultraviolet source wavelength close, and the two is being oxidized the synergy in atmosphere, thus reach the comparatively satisfied comprehensive degradation effect of foul gas.
(1) UV photodissociation
Utilize the effect of special high energy quartz UV ultraviolet light source light beam light quantum, can the multiple stench organic gas of By Direct Pyrolysis, destroy the degraded of its molecular weight structural and change harmless low molecular compound into.
Produced the light quantum of different-energy in low-temperature plasma+composite photocatalyst industrial waste gas purification device by special excitation source, utilize odorant to the strong absorption of this light quantum, taking in a large number and can make odorant molecular dissociation and excite under the bombardment of light quantum.
Part odorant also can react with active group, is finally converted into CO
2and H
2the innocuous substances such as O, thus reach the object removing foul gas.The average energy of the light quantum produced because of its excitation source is at 1eV-7eV, suitable control reaction condition can realize generally being difficult to realize or make the very slow chemical reaction of speed to become very quick, substantially increases the degradation efficiency to organic gas such as NMHCs.
The light quantum oxygen molecules that also can decompose in air such as in fact this high energy quartz UV ultraviolet beam produce free oxygen, i.e. active oxygen, because positron-electron that free oxygen is taken is uneven so need be combined with oxygen molecule, and then produce ozone.
UV+O2 → O-+O* (active oxygen) O+O2 → O3 (ozone)
Ozone is due to its strong oxidizing property, to organic matter, there is extremely strong oxygenolysis, the elimination effect got instant result is had to foul gas and other excitant peculiar smell, simultaneously due to the unstability of ozone, after itself and rotten exhaust organic gas effect, itself fades away, and under the condition of substantial equilibrium, can not have an impact to final discharge.
(2) composite photocatalyst
The main component of " photocatalyst " (also referred to as " photochemical catalyst ") is nano-scale anatase titanium dioxide (TiO2), as a kind of new photocatalytic semiconductor material, Japan has been classified as the new technology given priority to this century, be described as state-of-the-art purification of air new technology in the world today, also obtain comparatively extensive use in China in recent years.
At room temperature, when wavelength is mapped on Nano titanium dioxide particle at the ultraviolet lighting of below 380nm, the electronics of valence band excite by ultraviolet light, transit to conduction band and form free electron, and the hole of a positively charged is formed in valence band, so just form electron-hole pair.Utilize the oxidation in hole and the reducing power of free electron that produce, the H of titanium dioxide and surface contact
2o, O
2react, produce the extremely strong free radical of oxidizing force, the nearly all organic substance of these free radical decomposable asymmetric choice net, the hydrogen (H) contained by it and carbon (C) are become water and carbon dioxide.
The existing metallic nickel of nickel foam is high temperature resistant, anticorrosive, the feature of stable chemical nature, there is again the tridimensional network of foam uniqueness, with it for matrix, the composite photo catalytic antibacterial foamed metal filter screen of appendix nano titanium oxide exploitation inherits all advantages of nickel foam, porosity more than 95% ensure that good air permeability, and the photocatalyst material specific area be evenly distributed at its envelope is large, surface coverage is high, increase to greatest extent and air and ultraviolet contact surface, in addition the three-dimensional character of foam metal, make photocatalysis " reaction chamber " full, ensure that its photocatalysis efficiency.
Under the UV-irradiation of specific electromagnetic wave, when air swirl enters filter screen, when namely entering light-catalyzed reaction chamber, high energy " electron-hole " directly carries out chemical reaction to immediately harmful with poison organic matter, is oxidized, is decomposed into free of contamination water and carbon dioxide etc.
(3) in waste gas there is degradation reaction in injurious factor under " low-temperature plasma+composite photocatalyst " effect
In fact, this parsing and dissociation, be degraded to low molecule by macromolecule, and injurious factor is degraded to the harmless factor, industrially just really realizes the innoxious effective way of organic exhaust gas.
3rd step, is disposed to the gas from gas tapping equipment after described low-temperature plasma+composite photocatalyst industrial waste gas purification device process in air.
With reference to accompanying drawing 1, in the present embodiment, implement the casting emission-control equipment of above-mentioned casting waste gas processing method, comprise air draught collecting hood 100, gas sampling pipeline 200, low-temperature plasma+composite photocatalyst industrial waste gas purification device 300, gas discharging apparatus 400, air draught collecting hood 100 has multiple and is arranged on foundry production line, further, in the present embodiment, multiple air draught collecting hood 100 comprises multiple first air draught collecting hood 110, multiple second air draught collecting hood 120, multiple 3rd air draught collecting hood 130, multiple first air draught collecting hood 110 is arranged on mechanization pouring product line, multiple second air draught collecting hood 120 is arranged at hand dropping production scene, ground, 3rd air draught collecting hood 130 is arranged at smelting furnace scene.
By arranging multiple air draught collecting hood 100 respectively at mechanization pouring product line, hand dropping production scene, ground, smelting furnace scene respectively, waste gas to whole foundry production line produces comprehensively is collected, thus concentrate process, this mode makes farthest to the air pollution reducing plant area, thus reaches good environment protecting.
Further, in the present embodiment, first air draught collecting hood 110 is flip-shell air draught collecting hood, flip-shell air draught collecting hood is arranged at the side of casting mold 500, the bottom of flip-shell air draught collecting hood and its fixing base carry out hinged, flip-shell air draught collecting hood can be overturn, and this flip-shell air draught collecting hood is prior art, thus flip-shell air draught collecting hood lives casting mold 500 by upset from closed upper part.
By above-mentioned vibrational power flow, make it possible to carry out turning operation to the flip-shell air draught collecting hood on mechanical pouring product line, be convenient to suction operation, thus after casting mold 500 upper liquid, carry out upset by flip-shell air draught collecting hood and close casting mold 500, the waste gas that the liquid of inside cast produces is aspirated, makes enclosure space have certain seal, farthest can aspirate waste gas, reach best suction effect.And need to pour into a mould time then flip formula air draught collecting hood, make it the side being in casting mold, expose plug hole, can pouring operation be carried out.This structure is simple and convenient, can handled easily well.
Further, in the present embodiment, second air draught collecting hood 120 is the portable air draught collecting hood of strip, the portable air draught collecting hood of strip comprises cuboid cover body, tube connector 121, described cuboid cover body is communicated with the gas sampling pipeline 200 being embedded in underground in advance by tube connector 121, tube connector 121 and gas sampling pipeline 200 removably connect, and cuboid cover body is provided with the SS 122 coordinated with multiple workshop sections position 600, and described cuboid cover body can relative to ground moving.
When pouring operation is carried out at hand dropping scene, ground, need certain space, at this moment need air draught collecting hood 100 away from workshop section position, so that operation, therefore, by the second air draught collecting hood 120 is designed to packaged type, make more convenient to operate, after casting complete, then air draught collecting hood 100 is moved to side, workshop section position 600 and carry out suction operation.Because multiple workshop sections position 600 forms linear production line by rows, therefore, the second air draught collecting hood 120 of setting is the portable air draught collecting hood of strip, can carry out suction operation to a production line simultaneously, make whole operation more simple and convenient, also simplify pipeline configuration.The tube connector 121 that second air draught collecting hood 120 is arranged removably connects with gas sampling pipeline 200, make the second air draught collecting hood 120 can carry out pipeline connection at the second air draught collecting hood 120 again when moving to workshop section 600 side, position, thus be convenient to the movement of whole second air draught collecting hood 120.
Further, in the present embodiment, the bottom of above-mentioned cuboid cover body is provided with pulley, and described ground is provided with the slide rail coordinated with described pulley.Slide rail is rectilinear rigid member, the upper surface of described rigid member is provided with the chute of U-shaped, described chute mates with the size of pulley, pulley can slide in chute, by the mode that the pulley of above-mentioned setting coordinates with slide rail, realize the movement of the second air draught collecting hood 120, frictional force is smaller, make the movement of the second air draught collecting hood 120 convenient, operating efficiency is higher.Certainly, also directly wheel can be set in the bottom of cuboid cover body, the second air draught collecting hood 120 can be moved on work ground.
Further, in the present embodiment, 3rd air draught collecting hood 130 is rotary air draught collecting hood, 3rd air draught collecting hood 130 is arranged at the side of smelting furnace 700, the cover mouth down of the 3rd air draught collecting hood 130,3rd air draught collecting hood 130 is connected with ground by bracing frame 800, and the 3rd air draught collecting hood 130 and bracing frame 800 are rotationally connected, the cover mouth of the 3rd air draught collecting hood 130 can turn to smelting furnace 700 top and just to the fire door of smelting furnace 700.The cover mouth of the 3rd air draught collecting hood 130 is horn-like, to cover the fire door of smelting furnace 700 better, thus collects waste gas better.
The waste gas that smelting furnace 700 produces is that the fire door above smelting furnace 700 is discharged, and therefore, needs the waste gas to fire door produces to collect.Simultaneously, the reinforced of smelting furnace 700 also adds from fire door, by above-mentioned vibrational power flow, 3rd air draught collecting hood 130 can be rotated relative to bracing frame 800, thus when needing reinforced, the cover mouth of the 3rd air draught collecting hood 130 is horizontally rotated on one side, again cover mouth is turned to the upper Founder of smelting furnace 700 after having fed in raw material to fire door, the waste gas that smelting furnace 700 produces is aspirated, reach best suction effect, and this rotary air draught collecting hood design is ingenious, structure is simple, be convenient to install and operation, the waste gas that can realize well smelting furnace 700 produces aspirates.
Multiple air draught collecting hood 100 is all communicated with the inlet end of gas sampling pipeline 200, the outlet side of gas sampling pipeline 200 is communicated with the air inlet of low-temperature plasma+composite photocatalyst industrial waste gas purification device 300, the gas outlet of low-temperature plasma+composite photocatalyst industrial waste gas purification device 300 is communicated with the air inlet of gas discharging apparatus 400, and the gas outlet of gas discharging apparatus 400 is communicated with air.
Further, in the present embodiment, gas discharging apparatus 400 comprises main air blower 410, exhaust chimney 420, the air inlet of main air blower 410 is communicated with the gas outlet of low-temperature plasma+composite photocatalyst industrial waste gas purification device 300, the gas outlet of main air blower 410 is communicated with exhaust chimney 420, and the outlet side of exhaust chimney 420 is stretched out outside factory building.By above-mentioned vibrational power flow, make to produce certain suction to whole gas sampling pipeline 200 by main air blower 410, meanwhile, the gas from low-temperature plasma+composite photocatalyst industrial waste gas purification device 300 after process can be discharged well.And by the setting of exhaust chimney 420, make it possible to directly purified gas is directly discharged in the air of plant area's eminence, can not impact the production of plant area.
In order to ensure the operation that is perfectly safe of whole device, in the present embodiment, this emission-control equipment also comprises flammable gas alarm device 900, flammable gas alarm device 900 comprises detector, alarm controller, detector is connected with alarm controller, alarm controller is connected with low-temperature plasma+composite photocatalyst industrial waste gas purification device 300, and detector is installed on the place of Leakage Gas.
By above-mentioned setting, the detector of the hazardous area of gas leakage can make to be arranged on when may be had to perceive the steam of combustible gas or flammable volatilization, detector detection signal is sent to alarm control unit immediately by cable, controller demonstrates gas concentration, when exceeding the alarm concentration value of setting, namely alarm controller sends sound, visual alarm export coordinated signals signal, control low-temperature plasma+composite photocatalyst industrial waste gas purification device 300 to shut down, thus ensure safety, avoid accident to occur.
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, above in conjunction with the accompanying drawing in the embodiment of the present invention, carry out describing clearly and completely to the technical scheme in the embodiment of the present invention, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.The assembly of the embodiment of the present invention describing and indicate in usual accompanying drawing herein can be arranged with various different configuration and design.
Therefore, the detailed description of the above embodiments of the invention to providing in the accompanying drawings the claimed scope of the present invention of not intended to be limiting, but only represent selected embodiment of the present invention.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
In describing the invention, it should be noted that, term " " center ", " on ", D score, " left side ", " right side ", " vertically ", " level ", " interior ", orientation or the position relationship of the instruction such as " outward " are based on orientation shown in the drawings or position relationship, or this invention product orientation of usually putting or position relationship when using, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.In addition, term " first ", " second ", " the 3rd " etc. only for distinguishing description, and can not be interpreted as instruction or hint relative importance.
In describing the invention, also it should be noted that, unless otherwise clearly defined and limited, term " setting ", " installation ", " being connected ", " connection " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, concrete condition above-mentioned term concrete meaning in the present invention can be understood.
Claims (10)
1. cast a waste gas processing method, it is characterized in that, comprise the following steps:
The collection of waste gas: the waste gas that foundry production line produces is collected by air draught collecting hood;
The purified treatment of waste gas: the described waste gas collected is gathered by pipeline and is delivered to low-temperature plasma+composite photocatalyst industrial waste gas purification device process, and
Gas from gas tapping equipment after described low-temperature plasma+composite photocatalyst industrial waste gas purification device process is disposed in air.
2. casting waste gas processing method according to claim 1, it is characterized in that, described waste gas comprises the mechanization pouring product line on foundry production line, ground hand dropping is on-the-spot, the waste gas that smelting furnace produces, waste gas on described mechanization pouring product line adopts fixed air draught collecting hood, flip-shell air draught collecting hood, portable air draught collecting hood or rotary air draught collecting hood are collected, the waste gas that hand dropping production scene, described ground produces adopts the portable air draught collecting hood of strip to collect, the waste gas produced in described smelting furnace adopts rotary air draught collecting hood to collect.
3. one kind implements the claims the casting emission-control equipment of the casting waste gas processing method described in 1, it is characterized in that, comprise air draught collecting hood, gas sampling pipeline, low-temperature plasma+composite photocatalyst industrial waste gas purification device, gas discharging apparatus, described air draught is collected and is covered with multiple and is arranged on described foundry production line, described multiple air draught collecting hood is all communicated with the inlet end of described gas sampling pipeline, the outlet side of described gas sampling pipeline is communicated with the air inlet of described low-temperature plasma+composite photocatalyst industrial waste gas purification device, the gas outlet of described low-temperature plasma+composite photocatalyst industrial waste gas purification device is communicated with the air inlet of described gas discharging apparatus, the gas outlet of described gas discharging apparatus is communicated with air.
4. casting emission-control equipment according to claim 3, it is characterized in that, described multiple air draught collecting hood comprises multiple first air draught collecting hood, multiple second air draught collecting hood, multiple 3rd air draught collecting hood, described multiple first air draught collecting hood is arranged on mechanization pouring product line, described multiple second air draught collecting hood is arranged at hand dropping production scene, ground, and described 3rd air draught collecting hood is arranged at smelting furnace scene.
5. casting emission-control equipment according to claim 4, it is characterized in that, described first air draught collecting hood is fixed air draught collecting hood, flip-shell air draught collecting hood, portable air draught collecting hood or rotary air draught collecting hood, and described fixed air draught collecting hood is positioned at the top of pour point position; Described flip-shell air draught collecting hood is arranged at the side of casting mold, and described flip-shell air draught collecting hood states casting mold by upset from closed upper part residence.
6. casting emission-control equipment according to claim 4, it is characterized in that, described second air draught collecting hood is the portable air draught collecting hood of strip, the portable air draught collecting hood of described strip comprises cuboid cover body, tube connector, described cuboid cover body is by tube connector and the described gas sampling pipeline communication being embedded in underground in advance, described tube connector and described gas sampling pipeline removably connect, described cuboid cover body is provided with the SS coordinated with multiple workshop sections positions, and described cuboid cover body can relative to ground moving.
7. casting emission-control equipment according to claim 6, is characterized in that, the bottom of described cuboid cover body is provided with pulley, and described ground is provided with the slide rail coordinated with described pulley.
8. according to the casting emission-control equipment in claim described in 4, it is characterized in that, described 3rd air draught collecting hood is rotary air draught collecting hood, described 3rd air draught collecting hood is arranged at the side of described smelting furnace, the cover mouth down of described 3rd air draught collecting hood, described 3rd air draught collecting hood is connected with ground by bracing frame, and described 3rd air draught collecting hood and support frame as described above are rotationally connected, the cover mouth of described 3rd air draught collecting hood can turn to described smelting furnace top and just to the fire door of described smelting furnace.
9. casting emission-control equipment according to claim 3, it is characterized in that, also comprise flammable gas alarm device, described flammable gas alarm device comprises detector, alarm controller, described detector is connected with described alarm controller, described alarm controller is connected with described low-temperature plasma+composite photocatalyst industrial waste gas purification device, and described detector is installed on the place of Leakage Gas.
10. casting emission-control equipment according to claim 3, it is characterized in that, described gas discharging apparatus comprises main air blower, exhaust chimney, the air inlet of described main air blower is communicated with the gas outlet of described low-temperature plasma+composite photocatalyst industrial waste gas purification device, the gas outlet of described main air blower is communicated with described exhaust chimney, and the outlet side of described exhaust chimney is stretched out outside factory building.
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| CN201610015469.1A CN105457489A (en) | 2016-01-11 | 2016-01-11 | Casting waste gas treatment method and device |
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| CN201610015469.1A CN105457489A (en) | 2016-01-11 | 2016-01-11 | Casting waste gas treatment method and device |
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| CN108211730A (en) * | 2017-12-28 | 2018-06-29 | 广德盛源电器有限公司 | A kind of exhaust gas absorption device of aluminum alloy die casting production |
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| CN114642943A (en) * | 2020-12-18 | 2022-06-21 | 陕西青朗万城环保科技有限公司 | Flue gas treatment equipment |
| CN113694697A (en) * | 2021-08-31 | 2021-11-26 | 中国平煤神马能源化工集团有限责任公司 | Waste gas treatment device in coal tar course of working |
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Application publication date: 20160406 |