CN202382992U - Total gaseous mercury fume sampling gun and sampling system thereof - Google Patents
Total gaseous mercury fume sampling gun and sampling system thereof Download PDFInfo
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- CN202382992U CN202382992U CN2011205588789U CN201120558878U CN202382992U CN 202382992 U CN202382992 U CN 202382992U CN 2011205588789 U CN2011205588789 U CN 2011205588789U CN 201120558878 U CN201120558878 U CN 201120558878U CN 202382992 U CN202382992 U CN 202382992U
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Abstract
The utility model discloses a total gaseous mercury fume sampling gun and a sampling system thereof and belongs to the filed of devices for sampling total gaseous mercury in fume. In order to reduce the fieldwork load and ensure the sampling success rate of a sampling adsorption tube, the utility model discloses a novel mercury sampling gun and a sampling system thereof, wherein the adsorption tube is arranged at the rear end of the sampling gun. The sampling gun comprises a sampling gun body, wherein one end of the sampling gun body is provided with an air inlet, and the other end of the sampling gun body is provided with a fume outlet; and an adsorption tube fixer is arranged at the part of the rear end of the sampling gun, adjacent to the fume outlet. The sampling gun provided by the utility model is provided with the adsorption tube for sampling protection and has the advantages of effectively reducing the on-site workload, improving the sampling repeatability, stabilizing the airflow which flows through the adsorption tube, improving the sampling precision and the like.
Description
Technical field
The present invention relates to a kind of environmental monitoring sample devices, be specifically related to a kind of sampling rifle and sampling system that is used for the collection of the total gaseous mercury of flue gas.
Background technology
To one of main source of airborne release mercury is coal-fired, annual because the mercury contaminants discharging that coal combustion causes accounts for the major part of mercury that mankind's activity discharges.It is effectively to reduce the measure that coal-fired process discharges the mercury amount that the afterbody gas detection of discharging behind the coal combustion is administered, and this just must sample to afterbody gas, detects mercury concentration wherein.Select suitable control measures according to different concentration.
Mercury mainly contains three kinds of forms in flue gas: element mercury, divalence mercury and particle states of matter mercury.Because mercury has different shapes such as zeroth order and divalence, its configuration again can Yin Wendu or the difference of factor such as catalyzer and changing, so is a difficult thing to the detection of mercury contaminants.Method to mercury sampling in the flue gas mainly contains Ontario flue gas wet sampling method at present, adsorbent is caught several kinds of distinct methods such as mercury method and mercury continuous blow-down monitoring system; Wherein adsorbent is caught the mercury method; Particularly based on the adsorption tube method (30B method) of EPA Method 30B standard; Easy to operate because of it, be easy to carry, the precision advantages of higher; Both can be used as the reference method Hg CEMS that is installed in coal-burning boiler and the relative accuracy of Hg STMS had been detected audit, and also can be used as standard method the Hg of discharged from coal-fired boiler is carried out conventional sense.
At present; The detection of mercury contaminants discharging, the main at present correlation technique that adopts U.S. EPA of China, the present invention mainly is exactly the normal process according to EPA Method 30B; And improve improvement; When guaranteeing identical accuracy of detection, simplified the operation steps of on-the-spot test, improve the success ratio of sampling.
U.S.EPA Method 30B extracts the flue gas of known volume from flue or pipeline through the pairing adsorption tube that inserts flue or pipeline with suitable flow, with being enriched in mercury and sampling volume on the adsorption tube as the calculating parameter of emission gases mercury concentration.Present mercury sampling system with reference to the 30B method; All be to abide by the 30B flow process adsorption tube is installed in the feeler lever front end, insert in flue or the pipeline, and adsorption tube generally adopt glass material; Belong to fragile article, in inserting flue or pipeline, occur easily breaking up and the failure that causes sampling; And each sampling end needs to change the adsorption tube of sampling feeler lever front end, brings bigger workload to spot sampling, has reduced sampling efficiency.
Fig. 1 is the local enlarged diagram of present 30B method sampling rifle front end in the accompanying drawing, wherein can obviously see for the protection adsorption tube protruding the probe with sampling rifle front end.Fig. 2 installs the local enlarged diagram of back user mode for adsorption tube, can see that in the actual practicality of adsorption tube, obviously exceed probe portion, former sampling rifle is limited to the protective effect of adsorption tube, causes the glass adsorption tube cracked etc. easily, and then causes sampling to be failed.
Summary of the invention
In order to reduce the burden of work on the spot, guarantee that the sampling adsorption tube is sampled into power, the present invention has designed a kind of total gaseous mercury flue gas sampling rifle and sampling system thereof, and adsorption tube is installed in the sampling gun back end.Effectively prevent the situation that breaks up of glass tube moving process, and made things convenient for the operation of changing glass tube,, do not need again feeler lever to be extracted from thieff hatch, directly change adsorption tube in the rear end to the sampling work of a point.
Total gaseous mercury flue gas sampling rifle of the present invention comprises sampling rifle body, and sampling rifle body one end has air intake opening, and the other end is provided with exhanst gas outlet, and the adsorption tube fixator is arranged on the nearly exhanst gas outlet of sampling gun back end position.Sampling rifle body inwall is PFA, FEP, any one material of PTFE or is covered with silicon coating.On the sampling rifle body zone of heating is set.Adsorption tube fixator correspondence position is provided with the adsorbent chamber temperature sensor in the sampling rifle body; The zone of heating correspondence position is provided with the heater wire temperature sensor.
The setting of rifle body adsorption tube fixator correspondence position is varied opening, is varied lid, varies to cover under job state to be tightly connected with the sampling rifle.
The external equipped mounting flange 7 of sampling rifle, sampling gun back end are provided with sampling rifle grip part 5, and described adsorption tube fixator 3 is the draw-in groove structure, and part is the described lid that varies after sampling rifle adsorption tube fixator 3 positions.
The external equipped mounting flange 7 of sampling rifle; Comprise front limit device 8, back stop 9 in the sampling rifle; Back stop 9 is positioned at varying of gun back end of sampling and covers, and sampling rifle front end docking location 10 is provided with internal and external threads or the frosted interface that cooperatively interacts with sampling gun back end docking location 11.
When applying the present invention to the 30B method, can the adsorption tube fixator be laterally arranged two, can reach the purpose of the parallel sampling of two-way.
Connect condenser, drying device successively behind the sampling rifle, drying device is connected with the controlling of sampling platform; Set gradually sampling pump, flowmeter in the controlling of sampling platform, isolation valve be connected in the sampling pump two ends in parallel after retaining valve is connected.Before the isolation valve vacuum pressure sensor is set in the controlling of sampling platform.
The present invention has following obvious effects:
1) adsorption tube is used in the protection sampling; During execute-in-place, the gas sampler of existing common employing 30B method, adsorption tube are contained in the feeler lever front end; Having part exposes out; Very easily run into hard thing and damage, cause the sampling failure, and the present invention will gather the glass adsorption tube of total gaseous mercury and be placed on sampling rifle body inside; Can play the effect of effective protection sampling pipe, avoid the glass adsorption tube because of bumping the fragmentation that situation such as tube wall cause.
2) effectively reduced on-the-spot workload; In the method sampling process of 30B, change adsorption tube, change after the rifle that needs to sample takes out, and adopt sampling rifle of the present invention, can directly open sampling rifle rear portion and change operation like need, more convenient, improve spot sampling efficient.
3) improve sampling repeatability; Repeatedly sampling to the timesharing of same pipeline or during same repeatedly sampling than extra heavy pipe road different mining sampling point; Can be behind the fixed sample rifle; Not rechanging the gun barrel position is replaceable adsorption tube; Thereby guarantee that the sampling operation of homogeneous is not the operation of carrying out at the inner same sampled point of flue, improve sampling repeatability.
4) steady flow improves sampling precision through the adsorption tube air-flow; When common 30B method is sampled; The flow of flue gas direction is 90 ° of angles in adsorption tube and the flue, and adopts sampling rifle of the present invention, the flue gas sampling rifle gun barrel part of before getting into adsorption tube, flowing through; Because being equipped with of sampling rifle gun barrel and adsorption tube fixator position; Change the flow of flue gas direction and make it consistent, thereby steady flow improves sampling precision through the air-flow of adsorption tube with the adsorption tube placement direction.
5) after the adsorption tube postposition, in rugged surroundings, use, for example do not have in the flue of dust arrester, can before the sampling rifle, install dust removal and filtration equipment additional, improve the adaptability that the sampling rifle uses.
6) the gun barrel inwall adopts special material to process, avoid gaseous mercury in the flue gas in the adverse effect that the absorption of sampling gun barrel inwall brings sampled result, has broken the convention that adsorption tube must be placed on sampling rifle leading portion.
7) on sampling rifle body, zone of heating is set; Can keep the temperature of flue gas when sampling rifle body is inner; Analog flue environment at utmost; The position that laterally arranges each other through zone of heating, sampling rifle body, adsorption tube three concerns, thereby makes flue gas flow rate, stability, flue-gas temperature all can meet the required working condition of adsorption tube optimum Working.
8) adopt the sample sampling system of rifle of the present invention, can improve sampling efficiency greatly, calculated in 20 minutes, accomplish the unitary sampling of a thief hatch and can practice thrift about 5 minutes varying the time, be equivalent to the single sampling time is shortened about 20% according to the single sample sampling.
Description of drawings
Fig. 1 is the local enlarged diagram of present 30B method sampling rifle front end.
Fig. 2 installs the local enlarged diagram of back user mode for adsorption tube.
Fig. 3 is for adopting technical scheme embodiment 1 synoptic diagram of the present invention.
Fig. 4 is for adopting technical scheme embodiment 2 synoptic diagram of the present invention.
Fig. 5 is a sampling system synoptic diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment technical scheme of the present invention is set forth:
Embodiment 1:
Fig. 3 is one of them specific embodiment of technical scheme of the present invention; As shown in Figure 3, total gaseous mercury flue gas sampling rifle comprises sampling rifle body; Sampling rifle one end has air intake opening 1; The other end is provided with exhanst gas outlet 2, and adsorption tube fixator 3 is arranged on the nearly exhanst gas outlet of sampling gun back end position, the draw-in groove of described adsorption tube fixator 3 for being arranged on sampling rifle gun barrel inwall, convexing to form; Adsorption tube fixator 3 is processed for high-temperature resistant rubber material (present embodiment employing silicon rubber), and adsorption tube is inserted fixing by the draw-in groove rear portion.Replacing for ease of adsorption tube; But can be arranged to detachable or Unclosing structure at sampling rifle rear portion; And be tightly connected with sampling rifle rifle body, part is whole after rifle adsorption tube fixator 3 positions of promptly sampling is the described lid that varies, and varies the corresponding sampling of lid rifle position and is changed to and varies opening; Adsorption tube can push draw-in groove and gets final product by varying opening, varies convenient and swift.For ease of operation, also comprise a sampling rifle grip part 5, on the sampling rifle body zone of heating 4 is set.
The sampling rifle stretches in the flue through the thieff hatch that is arranged on walling of flue 6 during sampling; Adsorption tube is placed in the draw-in groove; Sampling pipe one end is connected with exhanst gas outlet, connect condenser, drying device successively after, sampling pipe is terminal to be connected with the controlling of sampling platform; Can accomplish sampling preparation, can use the sampling rifle to begin operation.
Offering the sampling flue that special-purpose thief hatch or thief hatch position are provided with to the dress flange, can be on the sampling rifle equipped mounting flange 7, with the flue thief hatch the dress flange is docked installation, better fixed sample rifle.
Embodiment 2:
Fig. 4 is another specific embodiment of technical scheme of the present invention, and Fig. 4 varies opening in opened condition for the sampling rifle is the disassembly status synoptic diagram when varying; Sampling rifle structure is basic identical with embodiment 1, and among the embodiment 2, the adsorption tube fixator changes the stop that is arranged on rear and front end, adsorption tube position into; Comprise the front limit device 8 that is arranged on sampling rifle front end; Be arranged on the back stop 9 at sampling rifle rear portion, the rifle rear portion of sampling this moment is whole for varying lid, and sampling rifle front end docking location 10 is the hermetically-sealed construction that cooperatively interacts with sampling gun back end docking location 11; Can be set to the internal and external threads or the frosted interface of corresponding matching, reaching is tightly connected gets final product.
Adsorption tube fixator of the present invention; Include but not limited to above-mentioned two kinds of embodiments; For example bring formula V-type groove etc. together, be environmental monitoring field sampling tool and equipment fixed form commonly used, be able to fixedly the adsorption tube position, make its relatively fixed form of the stable placement of sampling rifle function all can use; For example vary lid again, be merely explanation and reach under the duty sealing and vary aperture position and get final product, can be arranged on the rifle side of sampling; Cover sampling rifle side; Or as the whole latter half of sampling rifle, the title among the present invention only plays the statement effect, does not limit to be necessary for lid-like; To play the structure of airtight effect a lot of for the position of varying that the sampling rifle is corresponding, and do not give unnecessary details one by one at this.
Adopt the sampling rifle of technical scheme of the present invention; Through the gun barrel of sampling rifle rifle body inside and the position matching design of the adsorption tube of sampling usefulness; Preposition flow of flue gas direction that causes of adsorption tube and the interior orthogonal technological deficiency of airflow direction of adsorption tube in the rifle of in the past sampling have been avoided; Adopt the sampling system of this programme; No matter the flue what state is selected in the sampling location, " sampling location should be arranged on apart from elbow, valve, reducer pipe downstream direction and be not less than 6 times of diameters and be not less than 3 times of diameter places apart from above-mentioned parts updrift side to guarantee to satisfy 4.2.1.1 among the GB16157-1996 " particle is measured and the gaseous contaminant method of sampling in the Concentration in Fixed Pollutants Source "." regulation, through stablizing sampling air flow to reach better sampling precision and sample effect.
Be to reduce the absorption of mercury vapour on sampling rifle rifle body inwall, the present invention's rifle rifle body inwall of sampling is selected PFA, FEP, any one material of PTFE for use or on rifle body inwall, is covered with anti-absorbent coating, reaches better sample effect; PFA is tetrafluoroethene-perfluorinated alkoxy vinyl ether copolymer, claims fluoroalkylation thing, soluble poly tetrafluoroethene again; FEP is a fluorinated ethylene propylene copolymer; The PTFE Chinese is a teflon; Anti-absorbent coating is mainly and solves mercury vapour in the absorption of the sampling rifle inwall problem to the sampled result deleterious impact, can adopt silicon coating, the coating that perhaps adopts above-mentioned PFA, FEP, PTFE material to process.
Using when coal steam-electric plant smoke sample, can outside the sampling rifle, install zone of heating additional, be used to keep flue gas to get into the problem when arriving the adsorption tube position behind the sampling rifle, described zone of heating heating and temperature control is between 80 ℃ ~ 150 ℃.Can set different temperatures to different pollutant samplings, zone of heating power supply and temperature control are supplied with, are set by the controlling of sampling main frame.Adsorption tube fixator correspondence position is provided with the adsorbent chamber temperature sensor in the sampling rifle body, and the zone of heating correspondence position is provided with the heater wire temperature sensor; Two temperature sensors are connected with the controlling of sampling main frame respectively, supply adsorption tube position flue-gas temperature and the current heating-up temperature of zone of heating under the sampling main frame monitoring state, to reach better temperature control effect.
Opening is varied in the setting of rifle body adsorption tube fixator correspondence position.Varying opening can adjust according to sampling rifle concrete structure, varies to comprise on the opening that is varied a lid.The described lid that varies is to be convenient for changing the sampling adsorption tube and can to carry out to be purpose, not limit to the pattern and the structure of varying lid airtight to the sampling rifle down in working order.The described lid that varies can be the rear portion of whole sampling rifle body; For example; In Fig. 4; Vary lid and be the whole rear portion of sampling rifle, described back stop 9, exhanst gas outlet 2, sampling rifle grip part 5 all are arranged on and vary cover, vary lid and adopt the modes that are tightly connected such as screw thread, frosted interface to be connected with the rifle front end of sampling to get final product.
Embodiment 3:
As shown in Figure 5, the sample sampling system of rifle of sampling the present invention connects condenser, drying device successively behind the sampling rifle, and drying device is connected with the controlling of sampling platform; Set gradually sampling pump, flowmeter in the controlling of sampling platform, isolation valve be connected in the sampling pump two ends in parallel after retaining valve is connected.Before the isolation valve vacuum pressure sensor is set in the controlling of sampling platform; Also can be in system the reload temperature sensor.The sampling system critical piece is debugged according to the 30B standard configuration.
Reference numeral corresponding component newly-increased among Fig. 5 is following: 12, condenser; 13, drying device; 14, isolation valve; 15, vacuum pressure sensor; 16, sampling pump; 17, retaining valve; 18, flowmeter; 19 adsorbent chamber temperature sensors; 20, heater wire temperature sensor; 21, temperature sensor; 22, adsorption tube; 23, controlling of sampling platform.A is a smoke air inlet, and B is the system evacuation mouth, and arrow is the flow of flue gas direction.
Each parts major function of system is following:
Condenser: be delivered into next flue gas through the heating pipeline, condenser condenses dewaters, and removes most of moisture in the flue gas.
Drying device: adopt the mode of drying agent suction to dewater once more.
Isolation valve: the control gas path on-off, open isolation valve during sampling; Be divided into two states during airtight test: 1, static check: the rifle of will sampling is connected with sampling system and finishes; Block sampling rifle air intake opening with the airtight test cap; Open sampling pump bleed be negative pressure in the road after, close isolation valve, observe vacuum pressure sensor registration situation of change; 2, dynamic chek: the rifle of will sampling is connected with sampling system and finishes, and closes the retaining valve branch road, starts sampling pump, in flue gas pipeline, forms negative pressure this moment, observes the relation between flowmeter registration and negative pressure; The airtight test decision data is with reference to the requirement in the 30B method.
Vacuum pressure sensor: before being used to sample with sampling after the equipment airtight test, and the measurement of flue gas pressures in the sampling process.
Sampling pump: produce sampling power with gas suction sampling system.
Retaining valve: what sampling pump adopted in the sampling gas circuit is the barrier film sampling pump, and the perfect condition of work need keep importing and exporting the pressure divergence at two ends can not be too big, adopts the pressure that retaining valve can balanced sample pump two ends, and the protection sampling pump prolongs life-span of sampling pump.
Flowmeter: realize control of sampling system sampling flow and measurement.
The adsorbent chamber temperature sensor: the temperature survey of adsorbent chamber is used for the Temperature Feedback control of adsorbent chamber temperature controller.
The heater wire temperature sensor: the temperature survey of zone of heating is used for the Temperature Feedback control of zone of heating temperature controller.
Temperature sensor: measure the sampling gas circuit, the temperature of flue gas in the cabinet part.
Controlling of sampling platform: integrate system's critical piece and sensor connection are set, and the equiping system power supply is supplied with, man-machine interaction unit.
Power plant has carried out the actual samples experiment in Shanghai to adopt sampling rifle of the present invention and sampling system, and data are following:
Table 1 mercury sampled data result
Sampled point is chosen the final floss hole of the SCR of power plant equipment flue gas, 90 ℃ ~ 110 ℃ of cigarette temperature, and the sampling rifle is set 110 ℃ of heating-up temperatures, sampling time: 20min, sampling flow 750ml/min.
The L of unit in the form: rise; Ng: nanogram; μ g/dscm: every cubic centimetre of microgram.Penetrance: the second adsorption band mercury adsorbance and the first adsorption band mercury adsorbance ratio in the flue gas, penetrance is one of main quality control index in the 30B method.
For checking technique effect of the present invention, adopted 3 kinds of technical schemes during sampling, be respectively: group 1, traditional 30B method sampling rifle, two-way is sampled simultaneously; Group 2, the rearmounted adsorption tube sampling of improvement back the present invention rifle; Group 3, the rearmounted adsorption tube sampling rifle of improvement back the present invention and gun barrel inwall adopt the PFA material.Can find through comparison; Group 2 is not owing to adopt PFA material inwall, and the rifle itself that causes sampling has certain Adsorption Effect to the mercury vapour in the flue gas, and final data descends about 20%; But owing to adopted the rearmounted technical scheme of adsorption tube, so penetrance is organized 1 obvious decline is arranged; Adopted rearmounted adsorption tube sampling rifle and gun barrel inwall to adopt the scheme of PFA combination of materials and organize 3, not only penetrance obviously descends, and the consistance of final sampled result and former methods and results is higher, proves that technical scheme is feasible.
Claims (10)
1. a total gaseous mercury flue gas sampling rifle comprises sampling rifle body, and sampling rifle body one end has air intake opening, and the other end is provided with exhanst gas outlet, it is characterized in that: the adsorption tube fixator is arranged on the nearly exhanst gas outlet of sampling gun back end position.
2. total gaseous mercury flue gas sampling rifle according to claim 1 is characterized in that: sampling rifle body inwall is PFA, FEP, any one material of PTFE or anti-absorbent coating.
3. total gaseous mercury flue gas sampling rifle according to claim 2 is characterized in that: on the sampling rifle body zone of heating is set.
4. total gaseous mercury flue gas sampling rifle according to claim 3 is characterized in that: adsorption tube fixator correspondence position is provided with the adsorbent chamber temperature sensor in the sampling rifle body; The zone of heating correspondence position is provided with the heater wire temperature sensor.
5. according to arbitrary described total gaseous mercury flue gas sampling rifle in the claim 1 to 4, it is characterized in that: the setting of rifle body adsorption tube fixator correspondence position is varied opening, is varied lid, varies to cover under job state to be tightly connected with the sampling rifle.
6. total gaseous mercury flue gas sampling rifle according to claim 5; It is characterized in that: the sampling external equipped mounting flange of rifle (7); The sampling gun back end is provided with sampling rifle grip part (5); Described adsorption tube fixator (3) is the draw-in groove structure, and part is the described lid that varies after sampling rifle adsorption tube fixator (3) position.
7. total gaseous mercury flue gas sampling rifle according to claim 5; It is characterized in that: the sampling external equipped mounting flange of rifle (7); Comprise front limit device (8), back stop (9) in the sampling rifle; Back stop (9) is positioned at varying of gun back end of sampling and covers, internal and external threads or frosted interface that sampling rifle front end docking location (10) and sampling gun back end docking location (11) setting cooperatively interact.
8. total gaseous mercury flue gas sampling rifle according to claim 1, it is characterized in that: the adsorption tube fixator laterally arranges two.
9. sampling system that adopts the described total gaseous mercury flue gas sampling rifle of claim 1 is characterized in that: connect condenser, drying device successively behind the sampling rifle, drying device is connected with the controlling of sampling platform; Set gradually sampling pump, flowmeter in the controlling of sampling platform, isolation valve be connected in the sampling pump two ends in parallel after retaining valve is connected.
10. sampling system according to claim 9 is characterized in that: before the isolation valve vacuum pressure sensor is set in the controlling of sampling platform.
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| CN2011205588789U CN202382992U (en) | 2011-12-29 | 2011-12-29 | Total gaseous mercury fume sampling gun and sampling system thereof |
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| CN2011205588789U CN202382992U (en) | 2011-12-29 | 2011-12-29 | Total gaseous mercury fume sampling gun and sampling system thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519760A (en) * | 2011-12-29 | 2012-06-27 | 南京埃森环境技术有限公司 | Total gaseous mercury flue gas sampling gun and sampling system thereof |
| CN106018010A (en) * | 2016-07-31 | 2016-10-12 | 江阴市嘉臣光电科技有限公司 | Handheld type flue gas sampler with ladder flange |
| CN106092670A (en) * | 2016-07-31 | 2016-11-09 | 江阴市嘉臣光电科技有限公司 | A kind of hand-held flue gas sampler of band magnetic flange |
| CN111947995A (en) * | 2020-08-18 | 2020-11-17 | 青岛明华电子仪器有限公司 | Automatic feeding sampling pipe device according to different measuring points |
-
2011
- 2011-12-29 CN CN2011205588789U patent/CN202382992U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519760A (en) * | 2011-12-29 | 2012-06-27 | 南京埃森环境技术有限公司 | Total gaseous mercury flue gas sampling gun and sampling system thereof |
| CN106018010A (en) * | 2016-07-31 | 2016-10-12 | 江阴市嘉臣光电科技有限公司 | Handheld type flue gas sampler with ladder flange |
| CN106092670A (en) * | 2016-07-31 | 2016-11-09 | 江阴市嘉臣光电科技有限公司 | A kind of hand-held flue gas sampler of band magnetic flange |
| CN111947995A (en) * | 2020-08-18 | 2020-11-17 | 青岛明华电子仪器有限公司 | Automatic feeding sampling pipe device according to different measuring points |
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Address after: 210042, Jiangsu province Nanjing Xuanwu Avenue 699-8 Xu Zhuang Software Park Development Zone 3, 1 Patentee after: Nanjing Assen Environmental Technology Co., Ltd. Address before: 210042, room 3, building 699-8, Xuanwu Avenue, Xuanwu District, Jiangsu, Nanjing, 102 Patentee before: Nanjing Assen Environment Technology Co., Ltd. |
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