CN104588386A - Novel gas collecting hood - Google Patents
Novel gas collecting hood Download PDFInfo
- Publication number
- CN104588386A CN104588386A CN201410856891.0A CN201410856891A CN104588386A CN 104588386 A CN104588386 A CN 104588386A CN 201410856891 A CN201410856891 A CN 201410856891A CN 104588386 A CN104588386 A CN 104588386A
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- Prior art keywords
- gas skirt
- framework
- collecting hood
- gas collecting
- gas
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- 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
- B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
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Abstract
The invention relates to a novel gas collecting hood, which effectively solves the problems that the use number of the traditional gas collecting hood is great, the vacancy rate is high, the building investment is high, the collecting efficiency and the low-cost operation cannot be considered at the same time, the effect is not ideal, and the like. The novel gas collecting hood has the technical scheme that an exhaust pipe is adopted, wherein a stop valve is arranged on the exhaust pipe, the lower end of the exhaust pipe connected with a ventilation pipe, the lower side of the ventilation pipe is connected with a gas collecting hood, a first through hole is formed in a gas colleting cavity of the gas collecting hood, the lower end of the gas collecting hood is connected with a framework, the lower end of the gas collecting hood is provided with soft vertical strips, the lower end of each vertical strip can extend to a work tabletop, no gap exists between every two vertical strips, and a second through hole is formed in any one or two vertical strips. The novel gas collecting hood has the advantages that the structure is ingenious, the number of gas colleting hood devices is reduced, the operation rate of the gas collecting hood is improved, the dismounting moving is convenient, the investment cost is low, the building cost is low, the sealing performance in the unorganized exhausted waste gas treatment space is improved, the collecting efficiency is improved, and meanwhile, the operation feasibility of equipment is also guaranteed.
Description
Technical field
The present invention relates to gas skirt technical field, particularly a kind of novel gas skirt.
Background technology
In the industry such as fine chemistry industry, equipment manufacturing, there are some production links, step can discharge a large amount of atmosphere pollution.Their contaminated environment, major part forms the polluter of PM2.5 gray haze phenomenon or front carrier, and wherein some material can also form photochemical fog.
For fine chemistry industry class manufacturing enterprise, these production links, step have following features:
(1) in the use of the material such as industrial chemicals, solvent, relate to broad categories, comprise the materials such as dirt class, various acid, gas, benzene homologues, alcohols thing, ester class.The wherein volatile diffusion of most material, has certain harmfulness to environmental and human health impacts, and when concentration is larger, excitant, harmfulness obviously increase, and can cause contact personnel significant discomfort, occur reaction symptom.
(2) its process units is mainly based on box like, cylinder (pipe) shape containers such as all kinds of evaporimeter, reactor, insulation still, pipelines, lays intensive, and valve, material gateway are more.Frequently between the process units such as all kinds of evaporimeter, reactor there is material transfer, add and load and unload, the phenomenon such as separation, the frequent operations such as its valve opening and closing, the folding of material gateway.
(3) actual production process, from the angle of Principles of Chemical Engineering, can be divided into pulverizing, screening, filters (press filtration), wash the unit operations such as (pickling, alkali cleaning), extraction, distillation, separation, dip-coating, evaporation, drying.The cycle of operation of unit operation is short, and each cycle often changes with material turnover in corresponding equipment, and this operation is also referred to as intermittent operation usually.
With the mode of operation feature of the service condition of the character of above-mentioned material, equipment, production accordingly, be exactly that these production links, step are in practical operation, can not carry out completely constantly, hermetically, thus inevitably make the material that uses in a large amount of production process, discharged into the atmosphere in high concentration.In environmental protection industry, this kind of discharge of title is waste gas (dirt) uncontrollable discharge in production process usually, and the equipment producing this kind of pollution is referred to as uncontrollable discharge source.
This discharge, if do not collected improvement, in workshop, the health of meeting serious harm staff, finally enters atmospheric environment, then pollutant atmosphere, adverse condition quality.Most of materials in them, as dirt class, sulfur dioxide, nitrogen oxide, hydrochloric acid (sulfuric acid mist), benzene homologues, alcohols thing, ester class thing etc., all form the polluter of PM2.5 gray haze phenomenon or front carrier, wherein some can also be formed " photochemical pollution ", produce the climatic phenomenon such as " greenhouse effects ", " depletion of the ozone layer ", and then directly or indirectly jeopardize vegeto-animal healthy growth.
For this kind of atmosphere pollution uncontrollable discharge existed in the manufacturing enterprise such as fine chemistry industry, equipment manufacturing, existing Treatment process main thought is first collected, post processing.Its key of administering is collection technique, and the core of collection technique is the design of gas skirt, and the design of gas skirt determines its collection efficiency to disordered exhaust gas, and the collection efficiency of gas skirt has a direct impact the discharge tool reducing this type of atmosphere pollution.
Gas skirt is generally in bell mouth shape or bucket-shaped, and narrow port is connected with air extractor, and wide port is just to uncontrollable discharge source.
Existing gas skirt can be divided into two classes:
(1) open gas skirt device.This kind of device main representative is that hanging type gas skirt is fixed on top.This kind of device is generally positioned at equipment (uncontrollable discharge source) top, and minority is positioned at side (afterwards) side.Spatially, Atmospheric Flow is only limited between this kind of gas skirt air inlet port plane and uncontrollable discharge source (equipment) operating surface (or table top), then through with ambient atmosphere on remaining direction.The advantage of this kind of device is convenient operation equipment, and shortcoming is the easy loss of equipment (uncontrollable discharge source) h substance, collection efficiency low (about 60%).
(2) closed gas skirt device.This kind of device main representative is fume hood.Equipment (uncontrollable discharge source) enclosing gets up by this kind of device, and openable operation window (hole) is left in side.Spatially, equipment (uncontrollable discharge source) and ambient atmosphere farthest completely cut off by this kind of gas skirt device, only have some gaps and air through.The advantage of this kind of device is that shortcoming is not easy to operating equipment to equipment (uncontrollable discharge source) h substance collection efficiency high (about 95%), and equipment is reinforced to be upgraded not easily.
In the process that enterprise builds in actual production, usually there is the device that many covers are identical, and their operation often time irreversibility, but all need the gathering-device that uncontrollable discharge material is set.No matter adopt which kind of gas skirt device like this, all there is gas skirt Quantity many, vacancy rate is high, the problem that construction investment is large; Meanwhile, during choice set gas hood device, also there is collection efficiency and operate and cheaply can not take into account, the problem that effect is undesirable.
For solving the problem, be necessary to provide a kind of technical scheme of improvement to overcome the problems referred to above.Can handled easily, can collection efficiency be ensured again, can also reducing the construction costs simultaneously.
Summary of the invention
For above-mentioned situation, for overcoming the defect of prior art, the object of the present invention is just to provide a kind of novel gas skirt, effectively solve traditional gas skirt usage quantity many, vacancy rate is high, and construction investment is large, collection efficiency and operation cheaply can not take into account, the problems such as effect is undesirable.
Its technical scheme solved is, comprise and be communicated with extraneous blast pipe, blast pipe is provided with stop valve, blast pipe lower end is connected with dismountable breather pipe, gas skirt is connected with below breather pipe, the air collecting chamber of gas skirt is provided with the first through hole, first through hole is connected with dome, the lower end of gas skirt is connected with telescopic framework, gas skirt lower end be provided with multiple around framework connect can self-closed combine soft vertical bar, the hang down lower end of bar can extend work top, does not have gap between every two vertical bars, and any one or two of the bar that hangs down are provided with the second through hole.
Structure of the present invention is ingenious, can save space, reduces gas skirt device quantity, improves gas skirt plant running rate, quantity, the scale of reduction corollary equipment; Simple to operate, be convenient to dismounting mobile, input cost is little, construction cost is low; Add uncontrollable discharge exhaust-gas treatment closure spatially, improve collection efficiency, also ensure the operation conveniency of equipment simultaneously.
Accompanying drawing explanation
Fig. 1 is front view of the present invention.
Fig. 2 is stereogram of the present invention.
Fig. 3 is gas skirt stereogram of the present invention.
Fig. 4 is gas skirt front view of the present invention.
Fig. 5 is gas skirt top view of the present invention.
Fig. 6 is the soft vertical bar front view of the present invention.
Fig. 7 is that the soft vertical bar of the present invention connects front view.
Fig. 8 is that the soft vertical bar of the present invention connects top view.
Fig. 9 is gas skirt of the present invention and multiple workbench connection diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Provided by Fig. 1 to Fig. 9, the present invention includes and be communicated with extraneous blast pipe 1, blast pipe 1 is provided with stop valve 15, blast pipe 1 lower end is connected with dismountable breather pipe 2, gas skirt 3 is connected with below breather pipe 2, the air collecting chamber of gas skirt 3 is provided with the first through hole 4, first through hole 4 is connected with dome 5, the lower end of gas skirt 3 is connected with telescopic framework 6, gas skirt 3 lower end be provided with multiple around framework 6 connect can self-closed combine soft vertical bar, the lower end of vertical bar 7 can extend work top 8, gap is not had between every two vertical bars 7, any one or two of bar 7 of hanging down are provided with the second through hole 9.
Described breather pipe 2 is cylindrical.
The first described through hole 4 is connected with rotatable dome 5, first through hole 4 place through hasp and is provided with sealing gasket 10.
Described blast pipe 1 lower end is provided with internal thread 11, breather pipe 2 upper external screw thread 12, and blast pipe 1 and breather pipe 2 are through screw thread or Flange joint.
Described gas skirt 3 lower end is connected with dismountable flexible framework 6, and framework 6 is rectangular, and gas skirt 3 is connected through screw with framework 6.
Described vertical bar 7 is rectangular, and the upper end of bar 7 of hanging down is connected with paster 13, and paster 13 is through screw or be lockingly fixedly connected on framework 6.
Described framework 6 surface is equipped with nylon velvet band, and the upper end of the bar that hangs down is connected with cambered surface paster, and the side of paster is provided with nylon hook strip.
Described corner place, framework 6 lower end is provided with dismountable stock 14, and the lower end of stock 14 can extend work top 8.
The second described through hole 9 is connected with vertical bar lid.
When the present invention uses, when the air-introduced machine of gas skirt works, near the air entry of gas skirt, form negative pressure, surrounding air flows to air entry from surrounding, forms suction air-flow and confluxes.When air suction area is less, can be considered " point sink " air-flow.Outer certain any the flow velocity of point sink and this square to be inversely proportional to air entry distance, the decay of air entry inhaling air Flow Velocity is very fast, therefore, should reduce the distance of cover mouth to pollution sources, to improve arresting efficiency when designing gas skirt as far as possible.
In fact, air entry always has certain size, and gas flowing is also resistant, and therefore, the isovelocity surface of air-breathing district gas flowing is not sphere but ellipsoid.Air entry Velocity Profiles has following characteristics:
1, the isovelocity surface near air entry is approximate parallel with suction inlet gas, when distance is 1 times of air entry diameter close to sphere, and becomes ellipsoid gradually along with the increase of distance.
2, the decay of air entry air velocity is very fast.
3, for the air entry that structure is certain, no matter air entry wind speed size, its isovelocity surface's shape is roughly the same.
When the present invention specifically uses, the breather pipe 2 of gas skirt 3 upper end is connected with blast pipe 1 through screw thread, framework 6 and gas skirt 3 can be connected as a single entity, also can dismantle, and soft vertical bar is a kind of material being similar to PVC door curtain, certainly can be dynamically connected closed, also can easily opens.
Embodiment one, framework 6 and gas skirt 3 are the structures be connected as a single entity, and when work top 8 is larger, change the size of framework by stretching framework 6, then vertical bar 7 are connected to the side of framework 6 through velcro.
Embodiment two, framework 6 and gas skirt 3 are the structures of separating, and are fixed on the lower end of gas skirt 3 by screw, change frame size to adapt to the size of work top 8, then vertical bar 7 is connected to the side of framework 6 through velcro by stretching framework 6.
Embodiment three, the bar 7 that hangs down can be PVC material, needs to stick one by one according to length.
Embodiment four, the bar 7 that hangs down can be connected on the side of framework 6 in advance, then frame 6 frame with vertical bar 7 is directly installed on gas skirt 3.
The present invention after a procedure, by the closure space that the soft vertical bar 7 of PVC is formed, the same surrounding environment of equipment (uncontrollable discharge source) maximum possible is separated, the gap of downside allows environmental gas to enter, make the flow field in space more regular, work equipments on stage (uncontrollable discharge source) waste gas that discharges farthest is collected through gas skirt 3 and discharges, and can not be passed to again in workshop cause workshop to pollute or waste gas poisoning.And operator need operation use time, from arbitrarily angled, motion arm can be put in the middle of the soft vertical bar 7 of PVC, simultaneously due to the existence of internal gas flow field negative pressure, even if make there is gap between soft vertical bar, gas remains and flows in gas skirt from gas skirt, avoid the effusion of gas, motion arm works on work top 8, health is still in outside, when operating, waste gas not easily damages human body like this, strengthens operator's production protective action, after having operated, as long as motion arm exits, PVC is soft, and vertical bar 7 will close by automatic bonding.
Gas skirt 3 is when plant operations uses, often can see a kind of situation: have multiple work top 8, work top 8 is respectively provided with gas skirt 3, but be work one by one during work, instead of work simultaneously, or only with a job, other be all for a long time after work again, this just makes the utilization rate of gas skirt 3 low, waste ample resources, and the present invention is divided into breather pipe 2 and blast pipe 1 the pipe above gas skirt 3, and through being threaded, operationally only need to lay a blast pipe 1, then work with a gas skirt 3, when needing after being finished to change jobs platform, gas skirt 3 is only needed to screw down, be arranged on another blast pipe 1 can continue to use.
Work top 8 is often provided with one or two pipe be horizontally through, now on one or two vertical bars 7 any, be provided with the second through hole 9, when installing vertical bar 7, only need the vertical bar 7 with the second through hole 9 to be arranged on position corresponding to pipe, the used time does not cover vertical bar.
When changing gas skirt 3, some work top 8 is provided with pipeline straight up, and this pipeline is vertically through the oblique sidewall of gas skirt 3, come through pipeline so be provided with the first through hole 4 on the air collecting chamber of gas skirt 3, seal with sealing gasket 10, when there is no pipeline, on dome 5 swivelling cover.
The bar 7 that hangs down has multiple with the connected mode of framework 6, and by screw, buckle, welding etc., and velcro facilitates the most and caking property also good connected mode.
Because the framework 6 below gas skirt 3 is rectangular, so have four turnings when connecting and hanging down bar 7, and these four corners may caking property insecure, so dismountable stock 14 can be provided with at corner place, then when connecting vertical bar 7, first the vertical bar 7 at corner place can be connected, ensureing corner place bonding firmly, insecure if bondd, the vertical bar 7 at corner place also can be selected to be fixed on stock 14.
Original work top 8 and the blank space above gas skirt 3, by the connected mode of the soft vertical bar 7 of PVC, are become an airtight cavity, decrease the space loss of waste gas, and do not hinder the operation to equipment, also strengthen the protection to operator simultaneously by the present invention.
Gas skirt design reasonable, uses less exhaust air rate just can the diffusion of effective control polluted articles, otherwise, even if the very large effect also not necessarily reached of exhaust air rate, should note when thus designing following some:
1, pollution sources should be surrounded by gas skirt as far as possible, make the diffusion of pollutant be limited in minimum zone, to prevent crossflow from disturbing, reduce exhaust air rate.
2, the inspiratory direction of gas skirt is consistent with gas stream of pollution direction as far as possible, makes full use of the initial kinetic energy of dusty gas.
3, reduce the aperture area of gas skirt, to reduce exhaust air rate as far as possible.
4, the inspiratory flow of gas skirt does not allow to enter in cover through remarkable respiratory region again.
5, the structure of gas skirt should not hinder human users and overhaul of the equipments.
The existence of the soft vertical bar of the present invention changes flow field structure makes the discharge of disordered exhaust gas that side direction loss be less likely to occur, and rule is neat more to make the flow field structure of gas.
The present invention's be stressed that, in gas skirt field, as long as have employed identical or similar structure and principle, is all considered as protection scope of the present invention.The present invention also has a lot of changes and improvements, and these changes and improvements all fall in the claimed scope of the invention.
Structure of the present invention is ingenious, can save space, reduces gas skirt device quantity, improves gas skirt plant running rate, quantity, the scale of reduction corollary equipment; Simple to operate, be convenient to dismounting mobile, input cost is little, construction cost is low; Add uncontrollable discharge exhaust-gas treatment closure spatially, improve collection efficiency, also ensure the operation conveniency of equipment simultaneously.
Claims (9)
1. a novel gas skirt, comprise and be communicated with extraneous blast pipe (1), it is characterized in that, blast pipe (1) is provided with stop valve (15), blast pipe (1) lower end is connected with dismountable breather pipe (2), breather pipe (2) below is connected with gas skirt (3), the air collecting chamber of gas skirt (3) is provided with the first through hole (4), first through hole (4) is connected with dome (5), the lower end of gas skirt (3) is connected with telescopic framework (6), gas skirt (3) lower end be provided with multiple around framework (6) connect can self-closed combine soft vertical bar, the lower end of vertical bar (7) can extend work top (8), gap is not had between every two vertical bars (7), any one or two of bar (7) of hanging down are provided with the second through hole (9).
2. the novel gas skirt of one according to claim 1, is characterized in that, described breather pipe (2) is cylindrical.
3. the novel gas skirt of one according to claim 1, is characterized in that, described the first through hole (4) is connected with rotatable dome (5) through hasp, and the first through hole (4) place is provided with sealing gasket (10).
4. the novel gas skirt of one according to claim 1, it is characterized in that, described blast pipe (1) lower end is provided with internal thread (11), breather pipe (2) upper external screw thread (12), blast pipe (1) and breather pipe (2) are through screw thread or Flange joint.
5. the novel gas skirt of one according to claim 1, it is characterized in that, described gas skirt (3) lower end is connected with dismountable flexible framework (6), framework (6) is rectangular, and gas skirt (3) is connected through screw with framework (6).
6. the novel gas skirt of one according to claim 1, it is characterized in that, described vertical bar (7) is rectangular, the hang down upper end of bar (7) is connected with paster (13), and paster (13) is through screw or be lockingly fixedly connected on framework (6).
7. the novel gas skirt of one according to claim 1, is characterized in that, described framework (6) surface is equipped with nylon velvet band, and the upper end of the bar that hangs down is connected with cambered surface paster, and the side of paster is provided with nylon hook strip.
8. the novel gas skirt of one according to claim 1, it is characterized in that, described framework (6) corner, lower end place is provided with dismountable stock (14), and the lower end of stock (14) can extend work top (8).
9. the novel gas skirt of one according to claim 1, is characterized in that, described the second through hole (9) is connected with vertical bar lid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410856891.0A CN104588386A (en) | 2014-12-31 | 2014-12-31 | Novel gas collecting hood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410856891.0A CN104588386A (en) | 2014-12-31 | 2014-12-31 | Novel gas collecting hood |
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| Publication Number | Publication Date |
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| CN104588386A true CN104588386A (en) | 2015-05-06 |
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| CN201410856891.0A Pending CN104588386A (en) | 2014-12-31 | 2014-12-31 | Novel gas collecting hood |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105057304A (en) * | 2015-08-10 | 2015-11-18 | 江苏西玛环境科技有限公司 | Dust removing device applied to flying dust solidification |
| CN105817456A (en) * | 2016-05-18 | 2016-08-03 | 惠州市环发环保科技有限公司 | Waste gas collection cover and reaction device |
| CN106731805A (en) * | 2016-12-29 | 2017-05-31 | 兰州大学 | Indoor pollution removal device and indoor purifying equipment |
| CN107351278A (en) * | 2017-08-16 | 2017-11-17 | 福清冠威塑料工业有限公司 | Plastic granulator gas collecting apparatus and its application method |
| CN108614083A (en) * | 2018-07-19 | 2018-10-02 | 河南省交通规划设计研究院股份有限公司 | Gas analyzer and method for detecting rubber asphalt pungent odour ingredient |
| CN109047254A (en) * | 2018-10-22 | 2018-12-21 | 浙江嘉化新材料有限公司 | A kind of gas gathering mask of organic exhaust gas |
| CN113102432A (en) * | 2021-04-13 | 2021-07-13 | 博兰特智慧实验室(江苏)有限公司 | Intelligent fume hood system and control method thereof |
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| CN201950387U (en) * | 2010-12-25 | 2011-08-31 | 芜湖奇瑞装备有限责任公司 | Ventilation system for adjusting welding station |
| CN203710882U (en) * | 2014-02-27 | 2014-07-16 | 邢台市大曹庄管理区康丰化工有限公司 | Collecting and purifying device for waste gases during production of density board |
| CN204503732U (en) * | 2014-12-31 | 2015-07-29 | 河南省环境保护科学研究院 | A kind of novel gas skirt |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105057304A (en) * | 2015-08-10 | 2015-11-18 | 江苏西玛环境科技有限公司 | Dust removing device applied to flying dust solidification |
| CN105817456A (en) * | 2016-05-18 | 2016-08-03 | 惠州市环发环保科技有限公司 | Waste gas collection cover and reaction device |
| CN106731805A (en) * | 2016-12-29 | 2017-05-31 | 兰州大学 | Indoor pollution removal device and indoor purifying equipment |
| CN107351278A (en) * | 2017-08-16 | 2017-11-17 | 福清冠威塑料工业有限公司 | Plastic granulator gas collecting apparatus and its application method |
| CN108614083A (en) * | 2018-07-19 | 2018-10-02 | 河南省交通规划设计研究院股份有限公司 | Gas analyzer and method for detecting rubber asphalt pungent odour ingredient |
| CN108614083B (en) * | 2018-07-19 | 2024-04-02 | 河南省交通规划设计研究院股份有限公司 | Gas analyzer and method for detecting pungent odor components of rubber asphalt |
| CN109047254A (en) * | 2018-10-22 | 2018-12-21 | 浙江嘉化新材料有限公司 | A kind of gas gathering mask of organic exhaust gas |
| CN109047254B (en) * | 2018-10-22 | 2024-03-15 | 浙江嘉化新材料有限公司 | Gas collecting hood for organic waste gas |
| CN113102432A (en) * | 2021-04-13 | 2021-07-13 | 博兰特智慧实验室(江苏)有限公司 | Intelligent fume hood system and control method thereof |
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Application publication date: 20150506 |