CN104858198A - Safe and energy-saving perchloric acid fume hood - Google Patents
Safe and energy-saving perchloric acid fume hood Download PDFInfo
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- CN104858198A CN104858198A CN201510175861.8A CN201510175861A CN104858198A CN 104858198 A CN104858198 A CN 104858198A CN 201510175861 A CN201510175861 A CN 201510175861A CN 104858198 A CN104858198 A CN 104858198A
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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
- B08B15/023—Fume cabinets or cupboards, e.g. for laboratories
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Abstract
The invention relates to a safe and energy-saving perchloric acid fume hood. The safe and energy-saving perchloric acid fume hood comprises a fume hood body, a variable air volume control system and an acid mist purification system, wherein the variable air volume control system comprises a variable air volume valve, an exhaust fan and an exhaust pipe; the acid mist purification system comprises a plurality of PP water distribution balls, nozzles, a PP upper water tank and a PP lower water tank; a plurality of water level probe control devices, a pH value adjustment metering pump and a corrosion-preventing pump are arranged on the PP lower water tank; the PP lower water tank is used for providing circulating spraying water for the nozzles through a circulating water pump and a circulating water pipe; the PP upper water tank is communicated with a PP lower water tank pipe; during use, acid mist gas flows upwards and water flows downwards to form counterflow exchange, so that the acid mist gas is in full contact with water mist, and lots of acid mist is dissolved in water to purify perchloric acid; when the pH value in the PP lower water tank is increased to a certain value, an alkaline reagent is automatically added into the PP lower water tank to realize neutral reaction, and then wastewater conformed with the discharge standards is discharged; after the wastewater is completely discharged, fresh water is injected into the PP lower water tank for continuous circuiting spraying use.
Description
Technical field
The present invention relates to laboratory equipment field, specifically a kind of energy-saving safe perchloric acid vent cabinet.
Background technology
Vent cabinet is the most important safety means of Modern Laboratory, it ensures negative pressure enough in vent cabinet by exhaust system, ensure the pollution not being subject to chemical substance of experimenter and experimental situation, vent cabinet has strict air quantity control system, but perchloric acid vent cabinet is removed outside the interior enough negative pressure safety factors of guarantee vent cabinet, also have important hazards to need to accomplish safety assurance, the crystalline solid having perchloric acid exactly in experimentation is adhered to the inwall of vent cabinet and the inwall of exhaust duct.In a lot of metal pre-treatment experimentation, often can use perchloric acid HClO
4with alkali metal generation chemical reaction, this chemical reaction process can produce a large amount of acid mists, perchloric acid is diffused into the deflector of vent cabinet and the inwall of exhaust duct by the wind-force of vent cabinet, and the easy crystallization of perchloric acid at normal temperatures, perchloric acid crystallizing layer can be produced through accumulation vent cabinet is after a while inner and exhaust duct is inner, after crystallizing layer reaches certain thickness, crystallizing layer is encountered water or vibration or can be produced combustion explosion after clashing into, and bursting strength is very big, the casualty accident of this respect is had to occur time in recent years, in order to this hidden danger of place that disappears, experimenter carries out irregularly artificial spraying-rinsing in ventilation shaft, although experimenter has done a lot of effort, but vent cabinet inside has the irregular airduct inside such as the elbow threeway of exhaust duct within a lot of turning all cannot clean to put in place, these local easily generation perchloric acid crystallizing layers, potential safety hazard is still very large, and also there is waste water resource in this cleaning way of curing the symptoms, not the disease, labor intensive, the shortcoming such as to leak.As shown in Figure of description 7,8, the waste gas of traditional vent cabinet focuses on roof process discharge, waste gas containing strong acid first corrodes exhaust duct and exhaust equipment or part acid solution and can precipitate or be adhered on exhaust duct, and the time has been grown will have waste reflux to arrive experiments experiment room; And this system energy consumption is larger, the air quantity scope of exhaust system is change under normal circumstances, and the water yield of this purification is fixing, when this system only has partial ventilation cabinet even to only have a vent cabinet to use, this external cleaning system also will all be opened, and causes waste.
The medium of vent cabinet is air and water, how solving fully contacting of air and water is the key technology of perchloric acid vent cabinet, the air current composition of vent cabinet inside is constantly change, do Outgassing model unrealistic, only continuous summary data in process of the test, a lot of parts and equipment is also had to be limited by relevant supplier, we will design the higher point water polo model of point water efficiency, the hydraulic characteristic(s) of circulation, allow water pump manufacturer specialty this type customized water pump, upper and lower seat water tank mostly is PP material, market there is no this series products, can only die sinking customized, all these brings very technical barrier to the research and development of perchloric acid vent cabinet and production, need our theoretical combination actual, continuous summing up experience, finally develop efficiently, low energy consumption, standarized perchloric acid's type vent cabinet of low cost.
Summary of the invention
The object of the invention is to for above-mentioned Problems existing and deficiency, the energy-conservation perchloric acid vent cabinet of normalized security of a kind of safe and efficient, low energy consumption, low cost be provided, make the design of laboratory ventilation system more flexibly, compatibility is stronger.
Technical scheme of the present invention is achieved in that a kind of energy-saving safe perchloric acid vent cabinet, comprise vent cabinet, variable air volume control system and acid mist purifying system is configured above vent cabinet, described variable air volume control system comprises the variable air rate valve being arranged on vent cabinet top, exhaust blower and exhaust duct, described acid mist purifying system comprises several PP be arranged between vent cabinet deflector and laboratory hood backboard and divides water polo, be arranged on the nozzle that PP divides water polo top, be arranged on the PP upper water box that PP divides water polo bottom, be arranged on the PP lower header of laboratory hood base, PP lower header is provided with multiple water-level probe control device, pH value regulates measuring pump and anti-corrosion water pump, PP lower header provides circulated sprinkling water by water circulating pump and circulating water pipe to nozzle, PP upper water box is communicated with PP lower header pipe, during use, acid mist gas is up, under water row, and form counterflow exchange, acid mist gas fully contacts with water smoke, and a large amount of acid mist dissolves in water the perchloric acid that is purified, also measuring pump is set simultaneously, when in PP lower header, the pH value of water is increased to certain numerical value, automatically add after alkaline reagent carries out neutralization reaction and drain the waste water meeting discharge standard, in PP lower header, inject fresh water quality after waste water is emptying again use for continuation circulated sprinkling.
Further, the wind speed of the Section Design windward 2m/s of described vent cabinet; The operating window safety surface wind speed 0.5m/s of vent cabinet, operating window opens maximum height 700mm.
Further, described PP divides water polo fillter section height to be 300mm, and when vent cabinet maximum quantity of wind runs, acid mist divides the time of water polo fillter section to be about 0.15s by PP.
Further, described nozzle selects the atomizer of 120 degree, quantity 2-3, the PP material that the material selection antiseptic property of nozzle is strong.
Further, described PP divides water polo diameter to be about 50mm, PP divides water polo to be oval-shaped ball, there is much tiny point water-band on ball surface, there is staggered point water-band inside, PP divides water polo for improving the adsorption area of water to acid mist, and also increase adsorption time, PP divides the PP material that the material selection antiseptic property of water polo is strong simultaneously.
Further, the PP material that described water circulating pump selects antiseptic property strong, low noise type centrifugal magnet pump, design adopts discharge 2-3m
3the magnetic centrifugal water pump of/h, lift 15-20m, power of motor is about 0.55kw.
Further, described PP lower header, in the position of feedwater height, overfall height, these entrances of drain height, is equipped with liquid level display, alarm signal will be had when liquid level is too low to send, all accessories and probe material selection anti-corrosive properties material.Will control pH value before draining, can discharge when pH value reaches discharge standard, inorganic salts are deposited in water tank inside by acid-base neutralization reaction, for avoiding this kind of situation, and cycle bleeder every month emptying waste water after 15 minutes, then fill it up with fresh water quality.Automatically to be added after alkaline reagent carries out neutralization reaction according to pH value by measuring pump and drain waste water, and inject fresh water quality; The duty of measuring pump and the measurement result of pH value link together, and when pH value size setting value, measuring pump will be started working, and carry out security monitoring in design by the solution storage capacity of alkali tank for this reason, guarantee that there is sufficient alkali lye the inside.
Further, variable air volume control system comprises air velocity transducer, displacement transducer, VAV control valve and controller, air velocity transducer measures the face wind speed of vent cabinet, displacement transducer and face air velocity transducer calculate the standard air quantity of vent cabinet, the aperture of controller quick adjustment VAV control valve, ensures vent cabinet standard airflow value and stability thereof; Installation region sensor installation above vent cabinet, vent cabinet face wind speed automatically switches; The form Lift too high or too low morning of vent cabinet, controller can send alarm signal, immediately to revise; Face wind speed is too high or just, controller can send alarm signal, immediately to revise; In emergency circumstances, open emergency exhaust, vent cabinet exhaust air rate is not subject to VAV control, with maximum quantity of wind work.
Further, also be provided with the safety monitoring device of cistern water level safety monitoring device, water circulating pump safety monitoring device, PH controller and measuring pump, the safety monitoring device of alkali liquid tank, the safety monitoring device of sour water collecting box, water supply safety supervising device, draining safety monitoring device, vent cabinet air quantity monitoring device, the safety monitoring device of exhaust blower, fillter section drag characteristic safety monitoring device, all these supervising devices are CSRC and are reserved with automatic building control system and network interface and general communications protocol.
The present invention is at vent cabinet inside configuration water filtering system, utilize the characteristic that perchloric acid is water-soluble fast, absorptivity up to 99% is carried out to perchloric acid, laboratory hood is inner and exhaust duct is inner can not produce perchloric acid crystallizing layer again, effectively prevent and produce crystallizing layer and the combustion explosion accident that causes occurs, thorough solution potential safety hazard, creates a safety, energy-saving and environmental protection, comfortable laboratory.
The present invention is compared with vent cabinet cleaning system in the market:
1, safer: vent cabinet of the present invention, by strong acid such as efficient absorption perchloric acid, is avoided perchloric acid on ventilation shaft and parts, produce crystallizing layer, set off an explosion.
2, perchloric acid vent cabinet uses more flexible, energy-saving and environmental protection more.
The present invention is not limited to perchloric acid experiment, may be used for the experiment of the strong acid bases such as hydrochloric acid, nitric acid, hydrofluoric acid and organic chemicals soluble in water, so the scope of application of perchloric acid type vent cabinet is more widely, after having had perchloric acid type vent cabinet, designer for laboratory industry provides wide platform, for building a safety, environmental protection, energy-conservation laboratory provide next important helper, wish to accomplish something in this field, prosperous laboratory industry of leading is advanced towards more healthy direction.
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Accompanying drawing explanation
Fig. 1 is operation principle schematic diagram of the present invention;
Fig. 2 is the structural representation of vent cabinet system of the present invention;
Fig. 3 is the schematic diagram of vent cabinet clean-up stage sectional wind velocity of the present invention;
Fig. 4 is vent cabinet operation principle schematic diagram of the present invention;
Fig. 5 is ventilation hood control system schematic diagram of the present invention;
Fig. 6 is vent cabinet PP lower header schematic diagram of the present invention;
Fig. 7 is the acid mist purifying System Working Principle figure of existing vent cabinet;
Fig. 8 is existing vent cabinet system architecture schematic diagram.
Detailed description of the invention
As Fig. 1, 2, 3, 4, shown in 6, the present invention is a kind of energy-saving safe perchloric acid vent cabinet, comprise vent cabinet 1, variable air volume control system and acid mist purifying system is configured above vent cabinet 1, described variable air volume control system comprises the variable air rate valve 2 being arranged on vent cabinet 1 top, exhaust blower 3 and exhaust duct 4, described acid mist purifying system comprises several PP be arranged between vent cabinet 1 deflector 11 and laboratory hood backboard 12 and divides water polo 5, be arranged on the nozzle 6 that PP divides water polo 5 top, be arranged on the PP upper water box 7 that PP divides water polo 5 bottom, be arranged on the PP lower header 8 of laboratory hood base 13, PP lower header 8 is provided with multiple water-level probe control device, pH value regulates measuring pump and anti-corrosion water pump, PP lower header 8 provides circulated sprinkling water by water circulating pump 81 and circulating water pipe 82 to nozzle 6, PP upper water box 7 is communicated with PP lower header 8 pipe, during use, acid mist gas is up, under water row, and form counterflow exchange, acid mist gas fully contacts with water smoke, and a large amount of acid mist dissolves in water the perchloric acid that is purified, also measuring pump is set simultaneously, when in PP lower header 8, the pH value of water is increased to certain numerical value, automatically add after alkaline reagent carries out neutralization reaction and drain the waste water meeting discharge standard, in PP lower header 8, inject fresh water quality after waste water is emptying again use for continuation circulated sprinkling.Fig. 5 is ventilation hood control system schematic diagram of the present invention.
As shown in Figure 7,8, the acid mist purifying System Working Principle figure of traditional vent cabinet, find out from this schematic diagram, acid mist needs through vent cabinet internal structure, exhaust duct and pipe fitting, exhaust blower before cleaning, these places can produce perchloric acid crystallizing layer, leave many places potential safety hazard, these traditional vent cabinets at present both at home and abroad all in production, but just do not have corresponding product for the laboratory hood of similar perchloric acid.We carry out comprehensive optimal design on the basis of tradition ventilation cabinet, comprise the external form of vent cabinet, the exhaust air rate of laboratory hood, each side such as purifier, the anti-corrosive properties material of laboratory hood, the security control of laboratory hood of laboratory hood proves design comprehensively.
As shown in Figure 3, the wind speed of the Section Design windward 2m/s of perchloric acid vent cabinet of the present invention, wind speed is unsuitable too low, the too low appearance and size that can increase laboratory hood, and occupation of land, cost, installation difficulty increase; Wind speed is unsuitable too high, and too high wind resistance increases, water droplet easily blows to exhaust duct inside, and operating cost increases.
As shown in Figure 4, the operating window safety surface wind speed 0.5m/s of perchloric acid vent cabinet 1 of the present invention, operating window opens maximum height 700mm, effective clear span 1300mm of 1500 wide vent cabinet operating windows, so calculates:
Vent cabinet maximum pump discharge: 0.5*1300*700 ≈ 1700 m
3/ h
Cross-sectional area: 1700/3600/2.0=0.236 m
2
Then vent cabinet fillter section is only dark: 0.236/1.3=180mm, gets clean dark L=200mm.
As shown in Figure 1, air is up, row under water, form counterflow exchange, air fully contacts with water smoke, a large amount of acid mist dissolves in water the target reaching purification perchloric acid, fillter section is unsuitable too low, too low meeting causes the contact incorporation time of air and water smoke shorter, water smoke fully can not absorb acid solution, fillter section is unsuitable too high, too highly the resistance of air draft will be increased, the pressure of exhaust blower is caused to become large, increase energy consumption, now design 300mm high, when laboratory hood maximum quantity of wind runs, acid mist passes through the time of fillter section about: 0.3/2=0.15s, this time obtained by high degree in contact is very limited in fact, even if fillter section Height Adjustment maximum height 1000mm, acid mist also only has 0.5s by the time of fillter section, this will be an important technology index and the difficult point of this product.Acid mist purifying efficiency is except time factor, the area also contacted with water smoke with acid mist has very large relation, the fogging degree of water spray is higher, ability of its absorption acid mist is stronger, and simultaneously nozzle quantity wants enough, and the guarantee water smoke that gushes out can cover the section face of acid mist process completely, for 1500 wide vent cabinets, according to shape and the space size of vent cabinet, the atomizer of 120 degree should be selected, quantity 2-3.The material of nozzle requires that antiseptic property is strong, current multiselect PP material.
The atomization ability of nozzle 6 is limited, at fillter section, we are equipped with point water polo that diameter is about 50mm, water polo is divided to be oval-shaped ball, there is much tiny point water-band on ball surface, there is staggered point water-band inside, by the adsorption area that the function of point water polo will provide water to acid mist greatly, too increase adsorption time simultaneously.The material of water polo is divided to require that antiseptic property is strong, current multiselect PP material.
Remove point water efficiency of the nebulization efficiency of water, point water polo, also to consider the irrigation pressure of nozzle and the design of injection flow rate, we will carry out proportioning according to the proper ratio of air quantity and the water yield, suitably can increase the flow of water, the material of water circulating pump requires that antiseptic property is strong, current multiselect PP material, low noise type centrifugal magnet pump.Had water circulating pump, the water gushed out can recycle, reduce water consumption, and design adopts the magnetic centrifugal water pump of discharge 2-3m3/h, lift 15-20m, and power of motor is about 0.55kw.
Along with acid mist constantly dissolves in recirculated water, the PH of water can be more and more higher, the concentration of perchloric acid also can be more and more higher, even reach capacity concentration, cause the corresponding reduction of the adsorption efficiency of the aqueous solution, our design to be added after alkaline reagent carries out neutralization reaction according to pH value automatically by measuring pump drains waste water, and injects fresh water quality.
Found out by Fig. 1, the out-of-shape of PP upper water box 7, installation operating space is limited, the fastness of the structure of water tank itself will be fully taken into account in the design process, consider the fixed installation of upper water box, the installation of nozzle, examine and replace, fillter section divides installation, the examine and replace of water polo, and spray casing and vent cabinet organically combine, also be that can this kind of vent cabinet a standardized key factor, particularly spray casing carried out standardized production by mould.
As shown in Figure 6, PP lower header 8 appearance and size is made to measure according to the lower seat of laboratory hood, and facilitate maintenance from now on and maintenance, water tank is waste water collection device, must carry out corresponding security control:
Feedwater is installed and is controlled: suitably design feedwater height, overfall height, drain height, the position of these entrances simultaneously, design will have liquid level display, and alarm signal will be had when liquid level is too low to send, all accessories and probe material must select anti-corrosive properties material, as PP material.
Draining security control: will pH value be controlled before draining, can discharge when pH value reaches discharge standard, inorganic salts are deposited in water tank inside by acid-base neutralization reaction, for avoiding this kind of situation, we will emphasize every month (the concrete cycle can suitably adjust) cycle bleeder emptying waste water after 15 minutes in this operational procedure, then fill it up with fresh water quality.
The security control of measuring pump: the duty of measuring pump and the measurement result of pH value link together, when pH value size setting value, measuring pump will be started working, and carry out security monitoring in design by the solution storage capacity of alkali tank for this reason, guarantee that there is sufficient alkali lye the inside.
The control of perchloric acid vent cabinet air quantity:
The negative pressure of vent cabinet inside depends on the exhaust air rate of vent cabinet, also relatively independent stability will be kept under the prerequisite ensureing enough negative pressure, for ensureing the security that perchloric acid type vent cabinet is enough, we ensure these safety factors in R & D of complex, variable air volume control system is configured above vent cabinet, this variable air volume control system becomes the standard configuration of perchloric acid vent cabinet together with acid mist purifying system, forms standard product.
The face wind speed of vent cabinet is measured according to air velocity transducer.
Calculate the standard air quantity of vent cabinet according to displacement transducer and face air velocity transducer, the aperture of controller quick adjustment VAV control valve, ensure vent cabinet standard airflow value and stability thereof.
Above vent cabinet there is sensor in installation region, and vent cabinet face wind speed automatically switches, and both ensures safety, again economize energy.
Form Lift too high or too low morning, controller can send alarm signal, immediately to revise.
Face wind speed is too high or just, controller can send alarm signal, immediately to revise.
In emergency circumstances, open emergency exhaust, vent cabinet exhaust air rate is not subject to VAV control, with maximum quantity of wind work.
Centralized Monitoring: the security monitoring of cistern water level security monitoring, water circulating pump security monitoring, PH controller and measuring pump, the security monitoring of alkali liquid tank, the security monitoring of sour water collecting box, water supply safety are monitored, draining security monitoring, vent cabinet air quantity are monitored, the security monitoring, the security monitoring of fillter section drag characteristic etc. of exhaust blower, all these monitoring system design are CSRC and are reserved with automatic building control system and network interface and general communications protocol, reach object simple to operate, easy to use.
System is more versatile and flexible: the vent cabinet quantity in physics and chemistry class laboratory is more, not that every platform all needs to do acid mist purifying device, we have to be divided into two cover systems, a set of configuration acid mist purifying device, another set ofly do not configure acid mist purifying device, the number of tubes of ventilating system increases, blower fan quantity increases, pipe well point position increases, and automatically controlled quantity increases, and overall cost increases, otherwise just select a larger acid mist purifying device, increase energy consumption; Had perchloric acid type vent cabinet, designer selects perchloric acid type vent cabinet for the place having acid mist purifying to need, and perchloric acid vent cabinet and other vent cabinet share a system, no longer install acid mist purifying device additional, economize energy, reduction cost, more environmental protection.
The extension of new product:
Have in the market import brand without pipe ventilated cabinet (meeting JG/T385 2012), it mainly adopts charcoal absorption organic chemical substance and slight acid mist, many limitations are had in laboratory applications, if our perchloric acid acid type vent cabinet can be monitored department's environment monitoring, be succeeded in developing by relevant environment, can make equally without pipe ventilated cabinet, from now on acid mist purifying system and charcoal absorption system are organically combined, make without pipe ventilated cabinet, expand the range of application of this kind of vent cabinet, the energy consumption in laboratory will be effectively controlled.
Attached economical and energy saving analytical table, for In Guangzhou Area:
Every platform vent cabinet hourly rate table (unit)
| Vent cabinet model | Purification expense | Power consumption expense | Ventilation expense | Full payment |
| FH-1200 | 1.36 | 0. 60 | 0.30 | 2.26 |
| FH-1500 | 1.36 | 0.60 | 0.40 | 2.36 |
| FH-1800 | 1.36 | 0.60 | 0.45 | 2.41 |
The expenses statement (unit) of every platform vent cabinet air draft air-conditioning loss
| Vent cabinet model | FH-1200 | FH-1500 | FH-1800 |
| Air-conditioning expense | 8.26 | 10.67 | 13.07 |
As can be seen from above, ventilating without pipeline type as made, will greatly reduce laboratory operating cost.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (9)
1. an energy-saving safe perchloric acid vent cabinet, it is characterized in that: comprise vent cabinet (1), vent cabinet (1) top configuration variable air volume control system and acid mist purifying system, described variable air volume control system comprises the variable air rate valve (2) being arranged on vent cabinet (1) top, exhaust blower (3) and exhaust duct (4), described acid mist purifying system comprises several PP be arranged between vent cabinet (1) deflector (11) and laboratory hood backboard (12) and divides water polo (5), be arranged on the nozzle (6) that PP divides water polo (5) top, be arranged on the PP upper water box (7) that PP divides water polo (5) bottom, be arranged on the PP lower header (8) of laboratory hood base (13), PP lower header (8) is provided with multiple water-level probe control device, pH value regulates measuring pump and anti-corrosion water pump, PP lower header (8) provides circulated sprinkling water by water circulating pump (81) and circulating water pipe (82) to nozzle (6), PP upper water box (7) is communicated with PP lower header (8) pipe, during use, acid mist gas is up, under water row, and form counterflow exchange, acid mist gas fully contacts with water smoke, and a large amount of acid mist dissolves in water the perchloric acid that is purified, also measuring pump is set simultaneously, when in PP lower header (8), the pH value of water is increased to certain numerical value, automatically add after alkaline reagent carries out neutralization reaction and drain the waste water meeting discharge standard, in PP lower header (8), inject fresh water quality after waste water is emptying again use for continuation circulated sprinkling.
2. perchloric acid vent cabinet according to claim 1, is characterized in that: the wind speed of the Section Design windward 2m/s of described vent cabinet (1); The operating window safety surface wind speed 0.5m/s of vent cabinet (1), operating window opens maximum height 700mm.
3. perchloric acid vent cabinet according to claim 1 and 2, is characterized in that: described PP divides water polo (5) fillter section height to be 300mm, and when vent cabinet (1) maximum quantity of wind runs, acid mist divides the time of water polo (5) fillter section to be about 0.15s by PP.
4. perchloric acid vent cabinet according to claim 3, is characterized in that: described nozzle (6) selects the atomizer of 120 degree, quantity 2-3, the PP material that the material selection antiseptic property of nozzle (6) is strong.
5. perchloric acid vent cabinet according to claim 4, it is characterized in that: described PP divides water polo (5) diameter to be about 50mm, PP divides water polo (5) to be oval-shaped ball, there is much tiny point water-band on ball surface, there is staggered point water-band inside, PP divides water polo (5) for improving the adsorption area of water to acid mist, and also increase adsorption time, PP divides the PP material that the material selection antiseptic property of water polo (5) is strong simultaneously.
6. perchloric acid vent cabinet according to claim 5, is characterized in that: the PP material that described water circulating pump (81) selects antiseptic property strong, low noise type centrifugal magnet pump, and design adopts discharge 2-3m
3the magnetic centrifugal water pump of/h, lift 15-20m, power of motor is about 0.55kw.
7. perchloric acid vent cabinet according to claim 6, it is characterized in that: described PP lower header (8) is in the position of feedwater height, overfall height, these entrances of drain height, liquid level display is housed, alarm signal will be had to send when liquid level is too low, all accessories and probe material selection anti-corrosive properties material.
8. perchloric acid vent cabinet according to claim 7, it is characterized in that: variable air volume control system comprises air velocity transducer, displacement transducer, VAV control valve and controller, air velocity transducer measures the face wind speed of vent cabinet, displacement transducer and face air velocity transducer calculate the standard air quantity of vent cabinet (1), the aperture of controller quick adjustment VAV control valve, ensures vent cabinet (1) standard airflow value and stability thereof; Installation region, vent cabinet (1) top sensor installation, vent cabinet (1) face wind speed automatically switches; The form Lift too high or too low morning of vent cabinet (1), controller can send alarm signal, immediately to revise; Face wind speed is too high or just, controller can send alarm signal, immediately to revise; In emergency circumstances, open emergency exhaust, vent cabinet (1) exhaust air rate is not subject to VAV control, with maximum quantity of wind work.
9. perchloric acid vent cabinet according to claim 8, it is characterized in that: be also provided with cistern water level safety monitoring device, water circulating pump safety monitoring device, the safety monitoring device of PH controller and measuring pump, the safety monitoring device of alkali liquid tank, the safety monitoring device of sour water collecting box, water supply safety supervising device, draining safety monitoring device, vent cabinet air quantity monitoring device, the safety monitoring device of exhaust blower, fillter section drag characteristic safety monitoring device, all these supervising devices are CSRC and are reserved with automatic building control system and network interface and general communications protocol.
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| CN106140330A (en) * | 2016-08-08 | 2016-11-23 | 贾春行 | Downward blowing waste gas purification ventilated chamber and control method thereof |
| CN106391638A (en) * | 2016-11-21 | 2017-02-15 | 成都土壤肥料测试中心 | Strong acid/base-resistant lower exhaust ventilation cabinet |
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| CN108592283A (en) * | 2018-05-25 | 2018-09-28 | 北京普莱德斯工程技术有限责任公司 | A kind of ventilating system |
| WO2019103225A1 (en) * | 2017-11-24 | 2019-05-31 | 최진선 | Fume hood |
| CN110479722A (en) * | 2019-08-20 | 2019-11-22 | 广东天赐湾实验室装备制造有限公司 | The energy-saving safe laboratory hood circulatory system |
| CN114393001A (en) * | 2022-01-18 | 2022-04-26 | 司唯(徐州)环境科学研究院有限公司 | Air filtering and purifying device and laboratory environment-friendly air purification type fume hood |
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| CN105257830A (en) * | 2015-10-21 | 2016-01-20 | 广东科艺普实验室设备研制有限公司 | Air volume adjusting valve with novel structure |
| CN107537839A (en) * | 2016-06-23 | 2018-01-05 | 陕西得天实验室设备有限公司 | A kind of explosion-proof wet dedusting vent cabinet |
| CN106140330A (en) * | 2016-08-08 | 2016-11-23 | 贾春行 | Downward blowing waste gas purification ventilated chamber and control method thereof |
| CN106391638A (en) * | 2016-11-21 | 2017-02-15 | 成都土壤肥料测试中心 | Strong acid/base-resistant lower exhaust ventilation cabinet |
| CN108405542A (en) * | 2017-02-09 | 2018-08-17 | 王楚平 | Rinsing type laboratory hood |
| CN107461862A (en) * | 2017-08-28 | 2017-12-12 | 广州泛美实验室系统科技股份有限公司 | A kind of laboratory exhaust gas heat recovery system |
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| KR20190060496A (en) * | 2017-11-24 | 2019-06-03 | 최진선 | Fume hood |
| CN108015082A (en) * | 2017-12-06 | 2018-05-11 | 徐州市环境监测中心站 | Special ventilating kitchen under the conditions of acid resolution in heavy metal-polluted soil detection |
| CN108015082B (en) * | 2017-12-06 | 2023-09-05 | 徐州市环境监测中心站 | Special ventilation kitchen under acid digestion condition in soil heavy metal detection |
| CN108592283A (en) * | 2018-05-25 | 2018-09-28 | 北京普莱德斯工程技术有限责任公司 | A kind of ventilating system |
| CN110479722A (en) * | 2019-08-20 | 2019-11-22 | 广东天赐湾实验室装备制造有限公司 | The energy-saving safe laboratory hood circulatory system |
| CN114393001A (en) * | 2022-01-18 | 2022-04-26 | 司唯(徐州)环境科学研究院有限公司 | Air filtering and purifying device and laboratory environment-friendly air purification type fume hood |
| CN114393001B (en) * | 2022-01-18 | 2023-12-22 | 司唯(徐州)环境科学研究院有限公司 | Air filtration purifier and laboratory are with environmental protection net gas formula fume chamber |
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| CN104858198B (en) | 2017-12-01 |
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Address after: 510663 floor 2, building B8, No. 11, Kaiyuan Avenue, Huangpu District, Guangzhou, Guangdong (room 264) Patentee after: GUANGZHOU FANMEI LABORATORY SYSTEM TECHNOLOGY Co.,Ltd. Address before: 510663 room 415, No. 19, Xiangshan Road, high tech Development Zone, Guangzhou, Guangdong Patentee before: GUANGZHOU FANMEI LABORATORY SYSTEM TECHNOLOGY Co.,Ltd. |