CN203908898U - Continuous fine particle monitor based on oscillating balance - Google Patents
Continuous fine particle monitor based on oscillating balance Download PDFInfo
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- CN203908898U CN203908898U CN201420293982.3U CN201420293982U CN203908898U CN 203908898 U CN203908898 U CN 203908898U CN 201420293982 U CN201420293982 U CN 201420293982U CN 203908898 U CN203908898 U CN 203908898U
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- 239000010419 fine particle Substances 0.000 title claims abstract description 53
- 238000012544 monitoring process Methods 0.000 claims abstract description 65
- 239000002245 particle Substances 0.000 claims abstract description 41
- 238000001035 drying Methods 0.000 claims description 31
- 239000002808 molecular sieve Substances 0.000 claims description 28
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 claims description 28
- 238000012546 transfer Methods 0.000 claims description 27
- 238000005070 sampling Methods 0.000 claims description 20
- 239000012528 membrane Substances 0.000 claims description 16
- 229920000557 Nafion® Polymers 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 8
- 238000000921 elemental analysis Methods 0.000 claims description 3
- 238000005303 weighing Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 238000007791 dehumidification Methods 0.000 description 2
- 238000000105 evaporative light scattering detection Methods 0.000 description 2
- 238000000434 field desorption mass spectrometry Methods 0.000 description 2
- 230000036651 mood Effects 0.000 description 2
- 230000002000 scavenging effect Effects 0.000 description 2
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- ZNCPFRVNHGOPAG-UHFFFAOYSA-L sodium oxalate Chemical compound [Na+].[Na+].[O-]C(=O)C([O-])=O ZNCPFRVNHGOPAG-UHFFFAOYSA-L 0.000 description 1
- 229940039790 sodium oxalate Drugs 0.000 description 1
- 238000010183 spectrum analysis Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- Sampling And Sample Adjustment (AREA)
Abstract
The utility model relates to a continuous fine particle monitor based on an oscillating balance. The continuous fine particle monitor based on the oscillating balance comprises an air collecting assembly, an auxiliary flow monitoring assembly connected with the air collecting assembly, a primary oscillating balance monitoring assembly connected with the air collecting assembly, and a secondary oscillating balance monitoring assembly connected with the air collecting assembly, wherein the air collecting assembly comprises a primary fine particle shunting unit and a secondary fine particle shunting unit; the primary oscillating balance monitoring assembly is connected with the primary fine particle shunting unit; the secondary oscillating balance monitoring assembly is connected with the secondary fine particle shunting unit; the primary oscillating balance monitoring assembly and the secondary oscillating balance monitoring assembly are simultaneously connected with an oscillating balance monitor. By using the continuous fine particle monitor, the influence caused by humidity can be well solved; by adopting time-share difference, the concentrations of volatile particles and semi-volatile particles can be measured, and the concentration values, not be influenced by the humidity, of the volatile particles and the semi-volatile particles can be obtained.
Description
Technical field
The utility model relates to a kind of fine particle continuous monitor, especially relates to a kind of fine particle continuous monitor based on oscillating balance.
Background technology
The at present as easy as rolling off a log impact that is subject to volatile matter and half volatile material of atmosphere particulate matter monitoring instrument based on micro-oscillating balance method, cause measure concentration seriously on the low side, go out the phenomenon that negative value or PM10 are less than PM2.5.
The FDMSFilter Dynamics Measurement System scheme of Thermo Scientific company can reduce the impact of volatile matter and half volatile material preferably; The double passage differential formula oscillating balance method of the gasoloid dehumidification system ADS of the acquisition utility model patent of Peking University and Wuhan rainbow instrument company limited also can have good effect in this respect.
At present, the mass detection chamber of trace oscillating balance method monitor requires isoperibol, the weightening finish that gathers filter membrane in particle is wherein subject to the impact of humidity, volatility and the half volatile particle of sampling air flow, can not directly reflect that the particle quality that enters filter membrane increases weight.
Current craft comparison mainly still utilizes separate unit sampling thief to be placed on automonitor side, the comparison result of simultaneously sampling, rather than same source sampling, so comparison result has certain error.
Utility model content
The utility model is mainly to solve the existing technical matters of prior art; A kind of impact that can solve well humidity is provided, by timesharing difference, can have measured again the concentration of volatile particles and half volatile particle, and obtained not being subject to the concentration value that affects of humidity, volatility and half volatile particle.Can also carry out same source sampling, rapidly manual weighing compared with the data of this monitor, or this monitoring is carried out to a kind of fine particle continuous monitor based on oscillating balance of concentration system compensation simultaneously.
Above-mentioned technical matters of the present utility model is mainly solved by following technical proposals:
A kind of fine particle continuous monitor based on oscillating balance, it is characterized in that, comprise a gas collecting assembly, the auxiliary flow monitoring assembly being connected with gas collecting assembly, the one-level oscillating balance monitoring assembly being connected with gas collecting assembly and the secondary oscillating balance monitoring assembly being connected with gas collecting assembly; Described gas collecting assembly comprises one-level fine particle dividing cell and secondary fine particle dividing cell; Described one-level oscillating balance monitoring assembly is connected with one-level fine particle dividing cell; Described secondary oscillating balance monitoring assembly is connected with secondary fine particle dividing cell, and described one-level oscillating balance monitoring assembly is connected oscillating balance detector with secondary oscillating balance monitoring assembly simultaneously.
Described one-level fine particle dividing cell comprises a PM10 cutter and the one-level shunt being connected with PM10 cutter; The isocon endpiece of described one-level shunt is connected with one-level oscillating balance monitoring assembly, and the secondary flow amount endpiece of one-level shunt is connected with secondary fine particle dividing cell.
Described secondary fine particle dividing cell comprises a PM2.5 cutter and the secondary shunt being connected with PM2.5 cutter; The isocon endpiece of described secondary shunt is connected with secondary oscillating balance monitoring assembly, and the secondary flow amount endpiece of secondary shunt is connected with auxiliary flow monitoring assembly.
Described one-level oscillating balance monitoring assembly comprises one-level first passage main flow exsiccator, one-level transfer valve, one-level constant warm tube, one-level zero air strainer, first quality detecting device, one-level dry molecular sieves, one-level flow sensor, one-level flow control valve, the blowback gas circuit of one-level drying tube, one-level regenerated molecular sieve, the first class pressure variable valve of the isocon endpiece that is connected to one-level shunt in turn.
Described secondary oscillating balance monitoring assembly comprises secondary first passage main flow exsiccator, secondary transfer valve, secondary constant warm tube, secondary zero air strainer, secondary mass detector, secondary drying molecular sieve, two_stage flow sensor, two_stage flow variable valve, the blowback gas circuit of secondary drying pipe, secondary regenerated molecular sieve, the secondary pressure variable valve of the isocon endpiece that is connected to secondary shunt in turn.
At above-mentioned a kind of fine particle continuous monitor based on oscillating balance, described auxiliary flow monitoring assembly comprises auxiliary pressure reduction drying tube, the first auxiliary changeover valve, aided filter membrane module, the second auxiliary changeover valve, auxiliary gas at normal temperature filtrator, auxiliary flow negative pressure transducer and the auxiliary flow ratio adjusting valve of the secondary flow amount endpiece that is connected to secondary shunt in turn; Described auxiliary flow ratio adjusting valve communicates with the external world after auxiliary pressure reduction drying tube.
At above-mentioned a kind of fine particle continuous monitor based on oscillating balance, the board-like or tube drier of exsiccator for using Nafion film to be dried, and the dried air-flow dew point of drying device is-50 ℃～4 ℃.This exsiccator divides inside and outside two-layer, and interior is sampling air flow passage, be outward dry gas stream passage, and two-way air-flow aspect is contrary.
At above-mentioned a kind of fine particle continuous monitor based on oscillating balance, one-level transfer valve and secondary transfer valve are electric three-way valve, and this valve is pass-through state in normal operation, measuring under volatile particles thing or school zero condition, are bypass condition.This valve is when bypass condition, and sampling air flow is after exsiccator, then enters zero air strainer through this valve, then by threeway, gets back to constant warm tube; One-level transfer valve and secondary transfer valve are controlled by system program, or user arranges its switching cycle and mode.
At above-mentioned a kind of fine particle continuous monitor based on oscillating balance, one-level zero air strainer and secondary zero air strainer are greater than 99% to the arresting efficiency of particle more than 0.1um, fill resistance and work as or adsorb the material of half volatile material or volatile matter, and working temperature is the temperature environment of-10～50 ℃.
At above-mentioned a kind of fine particle continuous monitor based on oscillating balance, one-level constant warm tube and secondary constant warm tube all work in the isoperibol of arbitrary temperature spot of-10 ℃～50 ℃, and this temperature spot is arranged by user, by PID mode, controls.
At above-mentioned a kind of fine particle continuous monitor based on oscillating balance, first quality detecting device and secondary mass detector all adopt micro-oscillating balance, work in the isoperibol of arbitrary temperature spot of 0 ℃～50 ℃, and this constant temperature point is set by the user.
At above-mentioned a kind of fine particle continuous monitor based on oscillating balance, one-level oscillating balance monitoring assembly and secondary oscillating balance monitoring assembly dry molecular sieves and regenerated molecular sieve are all used the mutual switch operating state of transfer valve.
At above-mentioned a kind of fine particle continuous monitor based on oscillating balance, one-level flow sensor and two_stage flow sensor are mass flow sensor.
At above-mentioned a kind of fine particle continuous monitor based on oscillating balance, the flow control valve that one-level flow control valve and two_stage flow variable valve are electronic control.
The flow control valve that first class pressure variable valve and secondary pressure variable valve are electronic control, and this valve can be installed.
Board-like or the tube drier of the auxiliary pressure reduction drying tube of described auxiliary traffic channel for using Nafion film to be dried; This exsiccator divides inside and outside two-layer, and interior is sampling air flow passage, be outward dry gas stream passage, and two-way air-flow aspect is contrary.
The diaphragm that the aided filter membrane module of auxiliary traffic channel is used is greater than 99% to the arresting efficiency of particle more than 0.1um, and working temperature is in the isoperibol of arbitrary temperature spot of-10～50 ℃, and this constant temperature Dian You producer and user set.This film can be monolithic diaphragm, uses balance to weigh, and can be also paper tape.When using paper tape, can be connected use with the module of other elemental analysis, measure the composition of particle.
The first auxiliary changeover valve of auxiliary traffic channel and the second auxiliary changeover valve are two valves that simultaneously move, for preventing from changing system leak or other impact that film causes.
Therefore, the utlity model has following advantage: can solve well the impact of humidity, by timesharing difference, can measure again the concentration of volatile particles and half volatile particle, and obtain not being subject to the concentration value that affects of humidity, volatility and half volatile particle.Can also carry out same source sampling, rapidly manual weighing compared with the data of this monitor, or this monitoring is carried out to concentration system compensation simultaneously.
Accompanying drawing explanation
Accompanying drawing 1 is the structural principle schematic diagram of middle gas collecting assembly of the present utility model.
Accompanying drawing 2 is structural principle schematic diagram of middle auxiliary flow monitoring assembly of the present utility model.
Accompanying drawing 3 is structural principle schematic diagram of middle one-level oscillating balance monitoring assembly of the present utility model.
Accompanying drawing 4 is structural principle schematic diagram of middle secondary oscillating balance monitoring assembly of the present utility model.
Accompanying drawing 5 is the schematic diagram that move towards of middle each gas circuit of sample states of the present utility model.
Accompanying drawing 6 is the schematic diagram that move towards of walking each gas circuit of zero condition in of the present utility model.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.In figure, gas collecting assembly 1, auxiliary flow monitoring assembly 2, one-level oscillating balance monitoring assembly 3, secondary oscillating balance monitoring assembly 4, PM10 cutter 5, one-level shunt 6, secondary shunt 7, PM2.5 cutter 8, one-level first passage main flow exsiccator 9, one-level transfer valve 10, one-level constant warm tube 11, one-level zero air strainer 12, first quality detecting device 13, one-level dry molecular sieves 14, one-level flow sensor 15, one-level flow control valve 16, the blowback gas circuit 17 of one-level drying tube, one-level regenerated molecular sieve 18, first class pressure variable valve 19, secondary first passage main flow exsiccator 20, secondary transfer valve 21, secondary constant warm tube 22, secondary zero air strainer 23, secondary mass detector 24, secondary drying molecular sieve 25, two_stage flow sensor 26, two_stage flow variable valve 27, the blowback gas circuit 28 of secondary drying pipe, secondary regenerated molecular sieve 29, the auxiliary pressure reduction drying tube 31 of secondary pressure variable valve 30, the first auxiliary changeover valve 32, aided filter membrane module 33, the second auxiliary changeover valve 34, auxiliary gas at normal temperature filtrator 35, auxiliary flow negative pressure transducer 36, auxiliary flow ratio adjusting valve 37.
Embodiment:
Paper is basic structure of the present utility model once:
The utility model comprises a gas collecting assembly 1, the auxiliary flow monitoring assembly 2 being connected with gas collecting assembly 1, the one-level oscillating balance monitoring assembly 3 being connected with gas collecting assembly 1 and the secondary oscillating balance monitoring assembly 4 being connected with gas collecting assembly 1; Described gas collecting assembly 1 comprises one-level fine particle dividing cell and secondary fine particle dividing cell; Described one-level oscillating balance monitoring assembly 3 is connected with one-level fine particle dividing cell; Described secondary oscillating balance monitoring assembly 4 is connected with secondary fine particle dividing cell, and described one-level oscillating balance monitoring assembly 3 is connected oscillating balance detector with secondary oscillating balance monitoring assembly 4 simultaneously.
One-level fine particle dividing cell comprises a PM10 cutter 5 and the one-level shunt 6 being connected with PM10 cutter 5; The isocon endpiece of described one-level shunt 6 is connected with one-level oscillating balance monitoring assembly 3, and the secondary flow amount endpiece of one-level shunt 6 is connected with secondary fine particle dividing cell.
Secondary fine particle dividing cell comprises a PM2.5 cutter 8 and the secondary shunt 7 being connected with PM2.5 cutter 8; The isocon endpiece of described secondary shunt 7 is connected with secondary oscillating balance monitoring assembly 4, and the secondary flow amount endpiece of secondary shunt 4 is connected with auxiliary flow monitoring assembly 2.
One-level oscillating balance monitoring assembly 3 comprises one-level first passage main flow exsiccator 9, one-level transfer valve 10, one-level constant warm tube 11, one-level zero air strainer 12, first quality detecting device 13, one-level dry molecular sieves 14, one-level flow sensor 15, one-level flow control valve 16, the blowback gas circuit 17 of one-level drying tube, one-level regenerated molecular sieve 18, the first class pressure variable valve 19 of the isocon endpiece that is connected to one-level shunt 6 in turn.
Secondary oscillating balance monitoring assembly 4 comprises secondary first passage main flow exsiccator 20, secondary transfer valve 21, secondary constant warm tube 22, secondary zero air strainer 23, secondary mass detector 24, secondary drying molecular sieve 25, two_stage flow sensor 26, two_stage flow variable valve 27, the blowback gas circuit 28 of secondary drying pipe, secondary regenerated molecular sieve 29, the secondary pressure variable valve 30 of the isocon endpiece that is connected to secondary shunt 7 in turn.
Auxiliary flow monitoring assembly 2 comprises auxiliary pressure reduction drying tube 31, the first auxiliary changeover valve 32, aided filter membrane module 33, the second auxiliary changeover valve 34, auxiliary gas at normal temperature filtrator 35, auxiliary flow negative pressure transducer 36 and the auxiliary flow ratio adjusting valve 37 of the secondary flow amount endpiece that is connected to secondary shunt 7 in turn; Described auxiliary flow ratio adjusting valve 38 communicates with the external world after auxiliary pressure reduction drying tube 39.
In the present embodiment, the board-like or tube drier of exsiccator for using Nafion film to be dried, and the dried air-flow dew point of drying device is-50 ℃～4 ℃.This exsiccator divides inside and outside two-layer, and interior is sampling air flow passage, be outward dry gas stream passage, and two-way air-flow aspect is contrary.
One-level transfer valve 10 and secondary transfer valve 21 are electric three-way valve, and this valve is pass-through state in normal operation, measuring under volatile particles thing or school zero condition, are bypass condition.This valve is when bypass condition, and sampling air flow is after exsiccator, then enters zero air strainer through this valve, then by threeway, gets back to constant warm tube; One-level transfer valve 10 and secondary transfer valve 21 are controlled by system program, or user arranges its switching cycle and mode.
The arresting efficiency of 23 pairs of particles more than 0.1um of the zero air strainer 12 of one-level and secondary zero air strainer is greater than 99%, fill the material that half volatile material or volatile matter are worked as or adsorbed in resistance, and working temperature is the temperature environment of-10～50 ℃; One-level constant warm tube 11 and secondary constant warm tube 22 all work in the isoperibol of arbitrary temperature spot of-10 ℃～50 ℃, and this temperature spot is arranged by user, by PID mode, control; First quality detecting device 13 and secondary mass detector 23 all adopt micro-oscillating balance, work in the isoperibol of arbitrary temperature spot of 0 ℃～50 ℃, and this constant temperature point is set by the user.
One-level oscillating balance monitoring assembly 3 and secondary oscillating balance monitoring assembly 4 dry molecular sieves and regenerated molecular sieve are all used the mutual switch operating state of transfer valve; One-level flow sensor 15 and two_stage flow sensor 26 are mass flow sensor; The flow control valve that one-level flow control valve 16 and two_stage flow variable valve 27 are electronic control; The flow control valve that first class pressure variable valve 19 and secondary pressure variable valve 30 are electronic control, and this valve can be installed.
Board-like or the tube drier of the auxiliary pressure reduction drying tube 31 of auxiliary traffic channel for using Nafion film to be dried; This exsiccator divides inside and outside two-layer, and interior is sampling air flow passage, be outward dry gas stream passage, and two-way air-flow aspect is contrary.
The craft of the auxiliary traffic channel diaphragm that film or analytic unit use of weighing is greater than 99% to the arresting efficiency of particle more than 0.1um, and working temperature is in the isoperibol of arbitrary temperature spot of-10～50 ℃, and this constant temperature Dian You producer and user set.This film can be monolithic diaphragm, uses balance to weigh, and can be also paper tape.When using paper tape, can be connected use with the module of other elemental analysis, measure the composition of particle; The transfer valve of auxiliary traffic channel and transfer valve are two valves that simultaneously move, for preventing from changing system leak or other impact that film causes.
It should be noted that:
1) Thermo Scientific company has been used subjunctive mood cutter to shunt and the cutting of PM2.5.But because this subjunctive mood cutter has requirement to the concentration of particle in air-flow, and often very high in this concentration of China, therefore very short at scavenging period interval, substantially in 1 month, just must clean once, carry out inconvenience to automatic monitoring measuring tape.In the utility model, used polycomponent stream technology and cyclone type PM2.5 cutter, split ratio is more flexible, and scavenging period interval can be greater than 3 months, and easy to clean.
2) FDMS of Thermo Scientific company is measuring the collection filter membrane that increases constant temperature on stream, by the concentration system that the mass incremental of this collection filter membrane is rectified an instrument, but because this measures the too little not enough 3L/min of flow of stream, need to come at least 72 hours mass accumulation increment could use 100,000/ balance weighing, can not to instrument concentration system, proofread and correct in a short time.The secondary flow road that the utility model is greater than 12L/min at larger flow increases constant temperature collection filter membrane, can within 24 hours short periods, be accumulated to enough convenient mass incrementals weighing, thereby can to instrument concentration system, proofread and correct in the shorter time.
3) FDMS of Thermo Scientific company measure on stream, increase this filter membrane of collection filter membrane of constant temperature also will be for weighing, by this filter membrane, remove the zero gas that involatile particle in sampling air flow, volatilization particle and the particle that partly volatilizees obtain a relative clean, but only limit to particle, its gaseous state form still likely penetrates filtrator, after by filtrator with before arriving mass detection chamber, form solid-state or aerocolloidal particle, thereby cause the measuring error of volatilization particle and the particle that partly volatilizees.The utility model is owing to not weighing and corrective system concentration with this filtrator, therefore can increase the absorbing material (as sodium carbonate, sodium oxalate etc.) that can absorb volatilization particle and the particle that partly volatilizees, make by the zero gas of this filtrator purer, thereby reduce the measuring error to volatilization particle and the particle that partly volatilizees.
4) utilization of Thermo Scientific company the pressure differential of the air-flow that produces of flow control valve before and after valve, thereby produce the gradient difference of steam partial pressure, Nafion film utilizes this gradient difference to dry.For Nafion film, the gradient difference of steam partial pressure is larger, and the effect of anhydrating is better.The utility model has increased sieve technology: utilize molecular sieve pressurization absorption, the principle that decompression desorbs, two molecular sieve are arranged on respectively after sampling membrane after the blowback air-flow with anti-blowpipe, by two position four-way valves, cut its adsorbed state and desorption state, thereby obtain the blowback air of less water vapor air pressure, the water vapor barometric gradient that increases Nafion film both sides is poor, reaches the effect of better drying.
5) ADS system is by refrigeration, to remove the moisture of sampling in gas to reach the object of drying, and be not precluded within the water of removal and also include the particle that needs are measured, so its measurement result is on the low side while using in certain environment.The utility model is used proton exchange mode to remove selectively the moisture in sampling gas, and the tubular construction that dries that has design patent, and dehumidification efficiency is high, simple in structure, low-carbon energy-saving.
6) use the utility model can utilize secondary flow amount gas circuit particle to be carried out to the sampling of paper tape formula, and connect X-ray diffraction or spectral analysis module and carry out the constituent analysis of particle, the half volatile particle concentration obtaining in conjunction with constant temperature filter and handover measurement, completes the function that current like product can not complete.
Specific embodiment described herein is only to the explanation for example of the utility model spirit.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.
Although more used gas collecting assembly 1 herein, auxiliary flow monitoring assembly 2, one-level oscillating balance monitoring assembly 3, secondary oscillating balance monitoring assembly 4, PM10 cutter 5, one-level shunt 6, secondary shunt 7, PM2.5 cutter 8, one-level first passage main flow exsiccator 9, one-level transfer valve 10, one-level constant warm tube 11, one-level zero air strainer 12, first quality detecting device 13, one-level dry molecular sieves 14, one-level flow sensor 15, one-level flow control valve 16, the blowback gas circuit 17 of one-level drying tube, one-level regenerated molecular sieve 18, first class pressure variable valve 19, secondary first passage main flow exsiccator 20, secondary transfer valve 21, secondary constant warm tube 22, secondary zero air strainer 23, secondary mass detector 24, secondary drying molecular sieve 25, two_stage flow sensor 26, two_stage flow variable valve 27, the blowback gas circuit 28 of secondary drying pipe, secondary regenerated molecular sieve 29, the auxiliary pressure reduction drying tube 31 of secondary pressure variable valve 30, the first auxiliary changeover valve 32, aided filter membrane module 33, the second auxiliary changeover valve 34, auxiliary gas at normal temperature filtrator 35, auxiliary flow negative pressure transducer 36, auxiliary flow ratio adjusting valve 37 terms such as grade, but do not get rid of the possibility of using other term.Use these terms to be only used to describe more easily and explain essence of the present utility model; They are construed to any additional restriction is all contrary with the utility model spirit.
Claims (10)
1. the fine particle continuous monitor based on oscillating balance, it is characterized in that, comprise a gas collecting assembly (1), the auxiliary flow monitoring assembly (2) being connected with gas collecting assembly (1), the one-level oscillating balance monitoring assembly (3) being connected with gas collecting assembly (1) and the secondary oscillating balance monitoring assembly (4) being connected with gas collecting assembly (1); Described gas collecting assembly (1) comprises one-level fine particle dividing cell and secondary fine particle dividing cell; Described one-level oscillating balance monitoring assembly (3) is connected with one-level fine particle dividing cell; Described secondary oscillating balance monitoring assembly (4) is connected with secondary fine particle dividing cell, and described one-level oscillating balance monitoring assembly (3) is connected oscillating balance detector with secondary oscillating balance monitoring assembly (4) simultaneously;
Described one-level fine particle dividing cell comprises a PM10 cutter (5) and the one-level shunt (6) being connected with PM10 cutter (5); The isocon endpiece of described one-level shunt (6) is connected with one-level oscillating balance monitoring assembly (3), and the secondary flow amount endpiece of one-level shunt (6) is connected with secondary fine particle dividing cell;
Described secondary fine particle dividing cell comprises a PM2.5 cutter (8) and the secondary shunt (7) being connected with PM2.5 cutter (8); The isocon endpiece of described secondary shunt (7) is connected with secondary oscillating balance monitoring assembly (4), and the secondary flow amount endpiece of secondary shunt (4) is connected with auxiliary flow monitoring assembly (2);
Described one-level oscillating balance monitoring assembly (3) comprises one-level first passage main flow exsiccator (9), one-level transfer valve (10), one-level constant warm tube (11), one-level zero air strainer (12), first quality detecting device (13), one-level dry molecular sieves (14), one-level flow sensor (15), one-level flow control valve (16), the blowback gas circuit (17) of one-level drying tube, one-level regenerated molecular sieve (18), the first class pressure variable valve (19) of the isocon endpiece that is connected to one-level shunt (6) in turn;
Described secondary oscillating balance monitoring assembly (4) comprises the secondary first passage main flow exsiccator (20) of the isocon endpiece that is connected to secondary shunt (7) in turn, secondary transfer valve (21), secondary constant warm tube (22), secondary zero air strainer (23), secondary mass detector (24), secondary drying molecular sieve (25), two_stage flow sensor (26), two_stage flow variable valve (27), the blowback gas circuit (28) of secondary drying pipe, secondary regenerated molecular sieve (29), secondary pressure variable valve (30).
2. a kind of fine particle continuous monitor based on oscillating balance according to claim 1, it is characterized in that, described auxiliary flow monitoring assembly (2) comprises auxiliary pressure reduction drying tube (31), the first auxiliary changeover valve (32), aided filter membrane module (33), the second auxiliary changeover valve (34), auxiliary gas at normal temperature filtrator (35), auxiliary flow negative pressure transducer (36) and the auxiliary flow ratio adjusting valve (37) of the secondary flow amount endpiece that is connected to secondary shunt (7) in turn; Described auxiliary flow ratio adjusting valve (38) communicates with the external world after auxiliary pressure reduction drying tube (39).
3. a kind of fine particle continuous monitor based on oscillating balance according to claim 2, is characterized in that, the board-like or tube drier of exsiccator for using Nafion film to be dried, and the dried air-flow dew point of drying device is-50 ℃～4 ℃; This exsiccator divides inside and outside two-layer, and interior is sampling air flow passage, be outward dry gas stream passage, and two-way air-flow aspect is contrary.
4. a kind of fine particle continuous monitor based on oscillating balance according to claim 3, it is characterized in that, one-level transfer valve (10) and secondary transfer valve (21) are electric three-way valve, this valve is pass-through state in normal operation, measuring under volatile particles thing or school zero condition, is bypass condition; This valve is when bypass condition, and sampling air flow is after exsiccator, then enters zero air strainer through this valve, then by threeway, gets back to constant warm tube; One-level transfer valve (10) and secondary transfer valve (21) are controlled by system program, or user arranges its switching cycle and mode.
5. a kind of fine particle continuous monitor based on oscillating balance according to claim 4, it is characterized in that, one-level zero air strainer (12) and secondary zero air strainer (23) are greater than 99% to the arresting efficiency of particle more than 0.1um, fill resistance and work as or adsorb the material of half volatile material or volatile matter, and working temperature is the temperature environment of-10～50 ℃.
6. a kind of fine particle continuous monitor based on oscillating balance according to claim 5, it is characterized in that, one-level constant warm tube (11) and secondary constant warm tube (22) all work in the isoperibol of arbitrary temperature spot of-10 ℃～50 ℃, this temperature spot is arranged by user, by PID mode, controls.
7. a kind of fine particle continuous monitor based on oscillating balance according to claim 6, it is characterized in that, first quality detecting device (13) and secondary mass detector (23) all adopt micro-oscillating balance, work in the isoperibol of arbitrary temperature spot of 0 ℃～50 ℃, this constant temperature point is set by the user.
8. a kind of fine particle continuous monitor based on oscillating balance according to claim 6, it is characterized in that, one-level oscillating balance monitoring assembly (3) and secondary oscillating balance monitoring assembly (4) dry molecular sieves and regenerated molecular sieve are all used the mutual switch operating state of transfer valve.
9. a kind of fine particle continuous monitor based on oscillating balance according to claim 6, is characterized in that, one-level flow sensor (15) and two_stage flow sensor (26) are mass flow sensor.
10. a kind of fine particle continuous monitor based on oscillating balance according to claim 6, is characterized in that, the flow control valve that one-level flow control valve (16) and two_stage flow variable valve (27) are electronic control; The flow control valve that first class pressure variable valve (19) and secondary pressure variable valve (30) they are electronic control, and this valve need not be installed; Board-like or the tube drier of the auxiliary pressure reduction drying tube (31) of auxiliary traffic channel for using Nafion film to be dried; This exsiccator divides inside and outside two-layer, and interior is sampling air flow passage, be outward dry gas stream passage, and two-way air-flow aspect is contrary; The diaphragm that the aided filter membrane module (33) of auxiliary traffic channel is used is greater than 99% to the arresting efficiency of particle more than 0.1um, and working temperature is in the isoperibol of arbitrary temperature spot of-10～50 ℃, and this constant temperature Dian You producer and user set; This film is monolithic diaphragm, uses balance to weigh or paper tape; When using paper tape, can be connected use with the module of other elemental analysis, measure the composition of particle; First auxiliary changeover valve (32) of auxiliary traffic channel and the second auxiliary changeover valve (34) are two valves that simultaneously move, for preventing from changing system leak or other impact that film causes.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104111215A (en) * | 2014-06-04 | 2014-10-22 | 武汉市天虹仪表有限责任公司 | Oscillation balance-based fine particle continuous-monitoring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104111215A (en) * | 2014-06-04 | 2014-10-22 | 武汉市天虹仪表有限责任公司 | Oscillation balance-based fine particle continuous-monitoring device |
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