CN115855553A - An industrial exhaust hood collection efficiency test device and test method - Google Patents
An industrial exhaust hood collection efficiency test device and test method Download PDFInfo
- Publication number
- CN115855553A CN115855553A CN202211713756.1A CN202211713756A CN115855553A CN 115855553 A CN115855553 A CN 115855553A CN 202211713756 A CN202211713756 A CN 202211713756A CN 115855553 A CN115855553 A CN 115855553A
- Authority
- CN
- China
- Prior art keywords
- hood
- exhaust
- air
- closed enclosure
- characteristic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses an industrial exhaust hood collection efficiency testing device which comprises production equipment and a closed enclosure testing hood, wherein the production equipment is arranged inside the closed enclosure testing hood, the bottom of the closed enclosure testing hood is provided with an air supplement inlet, the inside of the closed enclosure testing hood is provided with an industrial exhaust hood, the top of the industrial exhaust hood is fixedly communicated with an exhaust pipe, and one end, far away from the industrial exhaust hood, of the exhaust pipe is fixedly communicated with an external factory exhaust gas treatment device. The invention adopts a low-speed diffusion 'air lake' air supplement mode and a closed enclosure testing cover similar to a full-capture closed cover, and can accurately measure the emission amount of the characteristic pollutants in the process production process in a complete production period; the collection amount of characteristic pollutants in the process production process in a complete production period under normal production working conditions can be accurately measured by removing the closed enclosure testing cover and closing the mechanical air supplement mechanism; and further, the on-site accurate measurement of the collection efficiency of the industrial exhaust hood can be realized.
Description
Technical Field
The invention relates to the technical field of waste gas collection, in particular to a device and a method for testing the collection efficiency of an industrial exhaust hood.
Background
Manufacturing industry (Manufacturing industry) refers to the industry that in the era of mechanical industry, certain resources (materials, energy, equipment, tools, capital, technology, information, manpower and the like) are utilized and converted into large tools, industrial products and consumer goods which can be used and utilized by people through the Manufacturing process according to market requirements. At present, china becomes the first major manufacturing industry in the world, and the clean production and green factories are actively advocated. The industrial production process is often accompanied by the emission of a large amount of waste gas pollution, if the waste gas in the industrial production cannot be effectively collected by a local exhaust device (such as various industrial exhaust hoods), the unorganized emission of the waste gas can not only cause the concentration of pollutants in a workshop to exceed the standard, but also harm the physical health of workers; and can also cause serious pollution to the surrounding atmospheric environment, which affects the health of surrounding residents.
At present, the relevant national, industrial and local standards clearly stipulate the concentration limit values of various pollutants in workshops of industrial places and the concentration limit value of a factory boundary caused by unorganized dissipation; there are also some guidelines such as industry, local guidelines or technical specifications, etc., which are focused on the collection efficiency of the exhaust hood of the industrial site and which provide some reference values. However, there is no good method for accurately determining the collection efficiency of the industrial exhaust hood, and it is difficult to determine the collection efficiency of the exhaust hood under the complex factory environment conditions by using the relevant theoretical/empirical formula and the CFD numerical simulation calculation method.
Disclosure of Invention
The invention aims to provide a device and a method for testing the collection efficiency of an industrial exhaust hood, which aim to solve the problems to be solved in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides an industry exhaust hood collection efficiency testing arrangement, includes that production facility and airtight enclose and keep off the test cover, production facility sets up in the airtight inside that encloses the test cover that keeps off, airtight bottom that encloses the test cover that keeps off has seted up the benefit wind import, airtight inside that encloses the test cover that keeps off is provided with the industry exhaust hood, the fixed intercommunication in top of industry exhaust hood has the exhaust pipe, the exhaust pipe is kept away from the one end of industry exhaust hood and the fixed intercommunication of external mill's exhaust treatment device, airtight one side that encloses the test cover is provided with carries out the machinery air supplement mechanism that mends the wind to the test of characteristic pollution emission volume, the surface of exhaust pipe is provided with the characteristic pollutant tester that tests characteristic pollutant concentration, the surface of exhaust pipe is provided with carries out the amount of wind test mechanism that tests the amount of airing exhaust.
Preferably, the mechanical air supplement mechanism comprises a variable frequency fan and an air supplement pipe, the output end of the variable frequency fan is fixedly communicated with the air supplement pipe, and the air outlet position of the air supplement pipe is located on one side of the air supplement inlet position at the bottom of the closed enclosure testing cover.
Preferably, air volume accredited testing organization includes pitot tube, coupling hose and pressure gauge, the pitot tube is installed in the inside of exhaust pipe, the fixed intercommunication of top one end of pitot tube has coupling hose, one side and the pressure gauge interconnect that coupling hose kept away from the pitot tube.
A method for testing collection efficiency of an industrial exhaust hood comprises the following steps:
a1: temporarily extending and surrounding the outer edge of the industrial exhaust hood above the welding station by using a metal sheet to form a closed enclosure testing hood, and reserving a certain air supplement inlet area at the bottom of the closed enclosure testing hood to ensure effective air exhaust of the industrial exhaust hood;
a2: installing a variable frequency fan and an air supplementing pipe, enabling the air outlet position of the air supplementing pipe to correspond to the air supplementing inlet at the bottom of the closed enclosure testing cover, and adjusting the frequency of the variable frequency fan to enable the ratio of the mechanical air supplementing quantity to the exhaust quantity of the exhaust cover to be lower than 60%; the air supplementing pipe sends the air supplementing blown by the variable frequency fan to the periphery of an air supplementing inlet of the closed enclosure testing cover, and the air supplementing air flow is firstly diffused outside the closed enclosure testing cover and attenuates momentum to form low-speed air close to the ground;
a3: the air supplementing gas slowly enters the closed enclosure testing cover under the suction action of the industrial exhaust hood, and all waste gas carried by the air supplementing gas is exhausted to an exhaust pipe by the industrial exhaust hood;
a4: the collection amount of the characteristic pollutants of the industrial exhaust hood is the emission amount of the characteristic pollutants in the production process of production equipment, and the emission amount of the characteristic pollutants is calculated by measuring the air quantity of an exhaust pipe and the real-time concentration of the characteristic pollutants in the exhaust pipe in a single production period;
a5: and (3) dismantling all the components of the temporarily installed and built airtight enclosure testing cover, closing the mechanical air supplement mechanism, keeping the complete consistency of the welding process production process in a complete production period, calculating the capture amount of the characteristic pollutants by measuring the air volume of the exhaust pipe and the real-time concentration of the characteristic pollutants in the exhaust pipe, and calculating the collection efficiency of the industrial exhaust cover.
Preferably, the emission amount calculation formula of the characteristic pollutant in the step A4 is as follows:
in the formula,. DELTA.P 1 The dynamic pressure of the exhaust pipe measured by the pitot tube; g 1 The air exhaust volume of the acceptable exhaust hood for the welding process; a. The 1 The cross section area of the exhaust pipeline is measured by a pitot tube; ρ is the density of the exhaust gas; e m The real-time emission rate of pollutants is characteristic of the welding process; c m The real-time concentration of the characteristic pollutant measured in the exhaust pipe under the emission quantity test working condition is measured; c o The real-time concentration of the intake air pollutant PM 10; m m Is the total emission of characteristic pollutants in a single production period in the welding process.
Preferably, the amount of the characteristic pollutant trapped in step A5 is calculated by the following formula:
in the formula: g 2 The air exhaust volume of the acceptable exhaust hood for the welding process; delta P 2 The dynamic pressure of the exhaust pipe measured by the pitot tube; a. The 2 The cross section area of the exhaust duct measured by the pitot tube; e c Real-time capture rate of contaminants characteristic of the welding process; c c The real-time concentration of the characteristic pollutants measured in the exhaust pipe under the test working condition is collected; c o Background concentration of the workshop pollutants; m c The real-time capture amount of characteristic pollutants in a single production period in the welding process; CE is the collection efficiency of the welding industry hood.
Compared with the prior art, the invention has the following beneficial effects:
(1) A closed enclosure testing cover similar to the full-capture closed cover is constructed in field design, air supplement is carried out in an air supply mode of low-speed diffusion 'air lake', and the characteristic pollutant emission amount of process production equipment in a single production period is measured.
(2) The arranged sealed enclosure testing cover is flexibly manufactured and installed according to field conditions, and the outer edge of the industrial exhaust hood is temporarily extended and enclosed to form the sealed enclosure testing cover; the bottom of the industrial exhaust hood is not closed, and a certain air supplement inlet area is reserved to ensure effective air exhaust of the industrial exhaust hood; the air supply pipe supplies the air supply to the periphery of an air supply inlet of the closed enclosure testing cover, the air supply flow is firstly diffused outside the closed enclosure testing cover and attenuates momentum to form a low-speed air lake close to the ground, and then the low-speed air lake slowly enters the closed enclosure testing cover under the suction action of the industrial exhaust cover and carries all process waste gas pollution to be discharged to the exhaust pipe by the industrial exhaust cover; the accuracy of the test result of the emission amount of the characteristic pollutants is ensured;
(3) The closed enclosure testing cover under the condition of low-speed diffusion air supplement has the function similar to a closed cover, can ensure that all process waste gas pollution is collected by an industrial exhaust hood, the collection amount of the characteristic pollutants of the industrial exhaust hood is the emission amount of the characteristic pollutants in the process production process, and the emission amount of the characteristic pollutants is calculated by measuring the air quantity of an exhaust pipe and the real-time concentration of the characteristic pollutants in the exhaust pipe in a single production period; the whole testing process ensures the complete consistency of the process production process.
(4) The method comprises the steps of dismantling a closed enclosure testing cover, closing a mechanical air supplement mechanism in a low-speed diffusion 'air lake' air supply mode, recovering normal production working conditions, realizing the measurement of the capture and emission amount of the characteristic pollutants of process production equipment in a single production period, keeping the complete consistency of the process production process in a complete production period, and calculating the capture amount of the characteristic pollutants by measuring the air volume of an exhaust pipe and the real-time concentration of the characteristic pollutants in the exhaust pipe.
(5) The air lake air supplement mode of low-speed diffusion and the closed enclosure testing cover similar to the full-capture closed cover are adopted, so that the emission quantity of the characteristic pollutants in the process production process in a complete production period can be accurately measured; the collection amount of characteristic pollutants in the process production process in a complete production period under normal production working conditions can be accurately measured by removing the closed enclosure testing cover and closing the mechanical air supplement mechanism; and further, the on-site accurate measurement of the collection efficiency of the industrial exhaust hood can be realized.
Drawings
Fig. 1 is a schematic structural view in front view.
In the figure: the device comprises a production device 1, an industrial exhaust hood 2, an exhaust pipe 3, a sealed enclosure testing hood 4, a mechanical air supplement mechanism 5, an air quantity testing mechanism 6, a characteristic pollutant tester 7, a pitot tube 8, a connecting hose 9, a pressure gauge 10, a variable frequency fan 11 and an air supplement pipe 12.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, the present invention provides a technical solution: the utility model provides an industry exhaust hood collection efficiency testing arrangement, includes production facility 1 and airtight fender test cover 4 that encloses, production facility 1 sets up in airtight inside of enclosing fender test cover 4, airtight bottom of enclosing fender test cover 4 has seted up the inlet of mending wind, airtight inside of enclosing fender test cover 4 is provided with industry exhaust hood 2, industry exhaust hood 2 is installed directly over production facility 1 or rear side top, and industry exhaust hood 2 includes but not limited to acceptance type exhaust hood, air suction type exhaust hood, semi-airtight exhaust hood, blows and inhales the formula exhaust hood, the sealed fender that uses of industry exhaust hood 2 can select for use foam baffle, plastics check curtain or material such as metal iron sheet, the top of industry exhaust hood 2 is fixed with intercommunication exhaust pipe 3, the one end that industry exhaust hood 2 was kept away from to exhaust pipe 3 is fixed with external mill's exhaust treatment device and is communicated, the air supply device is characterized in that a mechanical air supply mechanism 5 for supplying air for testing the emission quantity of characteristic pollutants is arranged on one side of the airtight enclosure testing cover 4, the air supply quantity of the mechanical air supply mechanism 5 is lower than the air discharge quantity of the exhaust pipe 3, the air discharge quantity is adjusted by adjusting the rotating speed of the variable frequency fan 11, a characteristic pollutant tester 7 for testing the concentration of the characteristic pollutants is arranged on the surface of the exhaust pipe 3, the characteristic pollutant tester 7 comprises but is not limited to a PM2.5 concentration tester, a PM10 concentration tester, a TVOC concentration tester and the like, an air quantity testing mechanism 6 for testing the air discharge quantity is arranged on the surface of the exhaust pipe 3, the mechanical air supply mechanism 5 comprises a variable frequency fan 11 and an air supply pipe 12, the output end of the variable frequency fan 11 is fixedly communicated with the air supply pipe 12, and the air outlet position of the air supply pipe 12 is positioned on one side of the air supply inlet position at the bottom of the airtight enclosure testing cover 4, the air volume testing mechanism 6 comprises a pitot tube 8, a connecting hose 9 and a pressure gauge 10, the pitot tube 8 is installed inside the exhaust pipe 3, one end of the top of the pitot tube 8 is fixedly communicated with the connecting hose 9, one side, far away from the pitot tube 8, of the connecting hose 9 is connected with the pressure gauge 10, a testing sampling port of the pitot tube 8 is arranged on a straight pipe section of the exhaust pipe 3, the distance from the testing sampling port to an upstream local resistance component is greater than 5 times of the hydraulic diameter of the pipeline, and the distance from the testing sampling port to a downstream local resistance component is greater than 2 times of the hydraulic diameter of the pipeline; the arrangement of the wind speed measuring points of the sampling section is arranged according to a middle rectangle method or an equal annular area method.
The method comprises the following steps that a closed enclosure testing cover 4 similar to a full-capture closed cover is designed and built on site, air supplement is carried out in an air supply mode of low-speed diffusion 'air lake', the characteristic pollutant emission quantity of process production equipment in a single production period is measured, the arranged closed enclosure testing cover 4 is flexibly manufactured and installed according to site conditions, the outer edge of an industrial exhaust hood 2 is temporarily extended and enclosed, and the closed enclosure testing cover 4 is formed; the bottom of the industrial exhaust hood is not closed, and a certain area of the air supplement inlet is reserved to ensure effective air exhaust of the industrial exhaust hood 2; the air supplementing quantity is adjusted by a variable frequency fan 11, an air supplementing pipe 12 sends the air supplementing to the periphery of an air supplementing inlet of the closed enclosure testing cover 4, air supplementing air flow is firstly diffused outside the closed enclosure testing cover 4 and attenuates momentum to form a low-speed 'air lake' close to the ground, then slowly enters the closed enclosure testing cover 4 under the suction action of the industrial exhaust hood 2, and all process waste gas pollution is carried and discharged to an exhaust pipe 3 by the industrial exhaust hood 2; the mechanical air supplement mechanism 5 cannot be directly sent into the closed enclosure testing cover 4, so that local positive pressure is prevented from being formed inside the closed enclosure testing cover 4 by high-speed air supplement airflow, and the accuracy of a test result of the emission amount of characteristic pollutants is ensured; the closed enclosure testing cover 4 under the condition of low-speed diffusion air supplement has the function similar to a closed cover, can ensure that all process waste gas pollution is collected by the industrial exhaust hood 2, the collection amount of the characteristic pollutants of the industrial exhaust hood 2 is the emission amount of the characteristic pollutants in the process production process, and the emission amount of the characteristic pollutants is calculated by measuring the air volume of the exhaust pipe 3 and the real-time concentration of the characteristic pollutants in the exhaust pipe 3 in a single production period; the complete consistency of the process production process is ensured in the whole test process, then the sealed enclosure test cover 4 is removed, the mechanical air supply mechanism 5 of the low-speed diffusion 'air lake' air supply mode is closed, the normal production working condition is recovered, the capture and emission quantity of the characteristic pollutants of the process production equipment in a single production period can be measured, the complete consistency of the process production process is kept in a complete production period, the capture quantity of the characteristic pollutants is calculated by measuring the air quantity of the exhaust pipe 3 and the real-time concentration of the characteristic pollutants in the exhaust pipe 3, and the complete emission quantity of the characteristic pollutants in the process production process in the production period can be accurately measured by adopting the low-speed diffusion 'air lake' air supply mode and the sealed enclosure test cover 4 similar to the complete capture sealed enclosure; the collection amount of characteristic pollutants in the process production process in a complete production period under the normal production working condition can be accurately measured by removing the closed enclosure testing cover 4 and closing the mechanical air supplement mechanism 5; and further, the on-site accurate measurement of the collection efficiency of the industrial exhaust hood 2 can be realized.
The second embodiment:
in this embodiment, the acceptance industrial exhaust hood 2 of the welding shop production process selects PM10 as the characteristic pollutant to perform the field test of the exhaust hood collection efficiency:
the test method comprises the following steps:
a1: the outer edge of the industrial exhaust hood 2 above the welding station is temporarily extended and surrounded by a metal sheet to form a closed enclosure testing hood 4, and a certain air supplement inlet area is reserved at the bottom of the closed enclosure testing hood 4 to ensure effective air exhaust of the industrial exhaust hood 2; a2: installing a variable frequency fan 11 and an air supplementing pipe 12, enabling the air outlet position of the air supplementing pipe 12 to correspond to the air supplementing inlet at the bottom of the closed enclosure testing cover 4, and adjusting the frequency of the variable frequency fan 11 to enable the ratio of the mechanical air supplementing quantity to the exhaust quantity of the exhaust cover to be lower than 60%; the air supplementing pipe 12 sends the supplementing air blown by the variable frequency fan 11 to the periphery of an air supplementing inlet of the closed enclosure testing cover 4, and the air supplementing air flow is firstly diffused outside the closed enclosure testing cover 4 and attenuates momentum to form low-speed air close to the ground;
a3: the air supplementing gas slowly enters the closed enclosure testing cover 4 under the suction action of the industrial exhaust hood 2, and all the waste gas carried by the air supplementing gas is discharged to the exhaust pipe 3 by the industrial exhaust hood 2;
a4: the collection amount of the characteristic pollutants of the industrial exhaust hood 2 is the emission amount of the characteristic pollutants PM10 in the production process of production equipment, and the emission amount of the characteristic pollutants PM10 is calculated by measuring the air volume of the exhaust pipe 3 in a single production period and the real-time concentration of the characteristic pollutants PM10 in the exhaust pipe 3; a5: all the components of the temporarily installed and built airtight enclosure testing cover 4 are dismantled, the mechanical air supplement mechanism 5 is closed, the complete consistency of the welding process production process is kept in a complete production period, the air quantity of the exhaust pipe 3 and the real-time concentration of the characteristic pollutant PM10 in the exhaust pipe 3 are measured, the collection quantity of the characteristic pollutant PM10 is obtained through calculation, and the collection efficiency of the industrial exhaust cover 2 is obtained through calculation. Preferably, the emission amount of the characteristic pollutant PM10 in the step A4 is calculated according to the following formula:
M m ＝∫E m dt
in the formula,. DELTA.P 1 Dynamic pressure of the exhaust pipe 3 measured by the pitot tube 8; g 1 The air exhaust volume of the welding process acceptance type industrial exhaust hood 2; a. The 1 The cross section area of the exhaust duct 3 measured by the pitot tube 8; ρ is the density of the exhaust gas; e m Real-time emission rate of pollutant PM10 is characteristic of welding process; c m The real-time concentration of the characteristic pollutant PM10 measured in the exhaust pipe 3 is measured for the emission amount test condition; c o The real-time concentration of the intake air pollutant PM 10; m m Is the total emission of the characteristic pollutant PM10 in a single production cycle of the welding process.
In the step A5, the amount of collected characteristic pollutants PM10 is calculated by the following formula:
M c ＝∫E c dt
in the formula: g 2 The air exhausting quantity of the industrial exhaust hood 2 is accepted for the welding process; delta P 2 The dynamic pressure of the exhaust pipe measured by the pitot tube 8; a. The 2 The cross-sectional area of the exhaust duct measured by the pitot tube 8; e c Real-time capture rate of pollutant PM10 is characteristic of welding process; c c The real-time concentration of the characteristic pollutant PM10 measured in the exhaust pipe 3 is measured in a trapping amount test condition; c o Background concentration of the workshop pollutants; m c The real-time capture amount of the characteristic pollutant PM10 in a single production period in the welding process; CE is the collection efficiency of the welding industry hood 2.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211713756.1A CN115855553A (en) | 2022-12-27 | 2022-12-27 | An industrial exhaust hood collection efficiency test device and test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211713756.1A CN115855553A (en) | 2022-12-27 | 2022-12-27 | An industrial exhaust hood collection efficiency test device and test method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115855553A true CN115855553A (en) | 2023-03-28 |
Family
ID=85656114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211713756.1A Pending CN115855553A (en) | 2022-12-27 | 2022-12-27 | An industrial exhaust hood collection efficiency test device and test method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115855553A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116952636A (en) * | 2023-09-21 | 2023-10-27 | 扬州福禄德实验设备有限公司 | Performance test device of fume chamber |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201265904Y (en) * | 2008-07-15 | 2009-07-01 | 王健 | Integral oil smoke collection and purification apparatus |
| CN108614920A (en) * | 2018-04-03 | 2018-10-02 | 同济大学 | A kind of multiple devices local exhaust simultaneity factor determines method |
| CN109127641A (en) * | 2018-10-31 | 2019-01-04 | 中国化学工业桂林工程有限公司 | A kind of vulcanization of rubber exhaust-gas efficient collection method |
| CN109869780A (en) * | 2019-02-22 | 2019-06-11 | 同济大学 | Unpowered up-feeding jet type displacement ventilation and supplementary air system for residential kitchen |
| CN110180276A (en) * | 2019-07-05 | 2019-08-30 | 中国化学工业桂林工程有限公司 | The dual nested refining glue exhaust gas concentration collection device of one kind and its collection method |
| CN111271806A (en) * | 2020-02-14 | 2020-06-12 | 东南大学 | Local exhaust device based on cyclone air curtain and control system thereof |
| CN112594751A (en) * | 2020-12-14 | 2021-04-02 | 同济大学 | Kitchen air supplementing method and air supplementing system |
| CN114320987A (en) * | 2021-12-28 | 2022-04-12 | 同济大学 | A dynamic diffusion airflow adjustment method used for supplementing air at the bottom of a hanging cabinet |
| CN115372045A (en) * | 2022-10-25 | 2022-11-22 | 佛山市顺德区美的洗涤电器制造有限公司 | Method and device for measuring direct collection efficiency, range hood and medium |
-
2022
- 2022-12-27 CN CN202211713756.1A patent/CN115855553A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201265904Y (en) * | 2008-07-15 | 2009-07-01 | 王健 | Integral oil smoke collection and purification apparatus |
| CN108614920A (en) * | 2018-04-03 | 2018-10-02 | 同济大学 | A kind of multiple devices local exhaust simultaneity factor determines method |
| CN109127641A (en) * | 2018-10-31 | 2019-01-04 | 中国化学工业桂林工程有限公司 | A kind of vulcanization of rubber exhaust-gas efficient collection method |
| CN109869780A (en) * | 2019-02-22 | 2019-06-11 | 同济大学 | Unpowered up-feeding jet type displacement ventilation and supplementary air system for residential kitchen |
| CN110180276A (en) * | 2019-07-05 | 2019-08-30 | 中国化学工业桂林工程有限公司 | The dual nested refining glue exhaust gas concentration collection device of one kind and its collection method |
| CN111271806A (en) * | 2020-02-14 | 2020-06-12 | 东南大学 | Local exhaust device based on cyclone air curtain and control system thereof |
| CN112594751A (en) * | 2020-12-14 | 2021-04-02 | 同济大学 | Kitchen air supplementing method and air supplementing system |
| CN114320987A (en) * | 2021-12-28 | 2022-04-12 | 同济大学 | A dynamic diffusion airflow adjustment method used for supplementing air at the bottom of a hanging cabinet |
| CN115372045A (en) * | 2022-10-25 | 2022-11-22 | 佛山市顺德区美的洗涤电器制造有限公司 | Method and device for measuring direct collection efficiency, range hood and medium |
Non-Patent Citations (1)
| Title |
|---|
| 陈益武: "通风空调管道安装", 31 October 2010, 中国矿业大学出版社, pages: 10 - 16 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116952636A (en) * | 2023-09-21 | 2023-10-27 | 扬州福禄德实验设备有限公司 | Performance test device of fume chamber |
| CN116952636B (en) * | 2023-09-21 | 2024-01-12 | 扬州福禄德实验设备有限公司 | Performance test device of fume chamber |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115855553A (en) | An industrial exhaust hood collection efficiency test device and test method | |
| CN104989669B (en) | It is a kind of to match the method that duct resistance reduces Powder discharging fan power consumption | |
| CN201792251U (en) | Oil mist collection device | |
| CN211317884U (en) | A VOC gas detection device | |
| CN107506508B (en) | Numerical analysis method of flow field in bag filter | |
| CN209878696U (en) | Workshop environment air quality detection device | |
| CN108361220A (en) | A kind of open type air eddy side intake and blowing device | |
| CN201625562U (en) | A suction duct structure of a ball mill | |
| CN213275511U (en) | Laboratory air safety monitoring system | |
| CN206688380U (en) | A kind of workshop dust filtering device | |
| CN209148041U (en) | A kind of chemical industry station-service portable air detection device | |
| CN2198602Y (en) | Measuring instrument for wind pipe leakage | |
| CN202994399U (en) | Leakage test bench for air outlet of automobile air conditioner | |
| CN204471206U (en) | A kind of polishing filter | |
| CN205403452U (en) | Battery piece dry -off oven exhaust apparatus | |
| CN211413117U (en) | A single-stand rolling mill mist evacuation system | |
| CN204165600U (en) | A kind of air quantity shield | |
| CN205815888U (en) | A kind of organobentonite flour mill with dosing function | |
| CN207770377U (en) | A kind of novel architecture tool cleaning device | |
| CN207992172U (en) | It is a kind of can a flue gas detecting system that drag multiple spot | |
| CN205717414U (en) | A large wind pressure range hood | |
| CN208132727U (en) | A kind of grinding dust-extraction unit | |
| CN101007230A (en) | Digital experiment method of bag dust-collector pulse jetting cleaning performance | |
| CN221506631U (en) | Sponge air permeability detector | |
| CN206881406U (en) | A kind of wall heat insulation material cutting dedusting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |