CN109459536A - A kind of high humidity low concentration dust generator - Google Patents
A kind of high humidity low concentration dust generator Download PDFInfo
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- CN109459536A CN109459536A CN201811630451.8A CN201811630451A CN109459536A CN 109459536 A CN109459536 A CN 109459536A CN 201811630451 A CN201811630451 A CN 201811630451A CN 109459536 A CN109459536 A CN 109459536A
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- 239000000428 dust Substances 0.000 title claims abstract description 89
- 239000012895 dilution Substances 0.000 claims abstract description 38
- 238000010790 dilution Methods 0.000 claims abstract description 38
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 238000005070 sampling Methods 0.000 claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 16
- 238000009826 distribution Methods 0.000 claims abstract description 13
- 238000000889 atomisation Methods 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 7
- 239000002699 waste material Substances 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 238000002156 mixing Methods 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 9
- 239000003595 mist Substances 0.000 claims description 9
- 239000003500 flue dust Substances 0.000 claims description 6
- 238000011897 real-time detection Methods 0.000 claims description 4
- 239000007921 spray Substances 0.000 claims description 4
- 230000000740 bleeding effect Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 6
- 238000002360 preparation method Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 44
- 238000012360 testing method Methods 0.000 description 7
- 238000004088 simulation Methods 0.000 description 6
- 230000006872 improvement Effects 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 239000000779 smoke Substances 0.000 description 5
- 230000001276 controlling effect Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000012159 carrier gas Substances 0.000 description 3
- 239000008246 gaseous mixture Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000002604 ultrasonography Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0006—Calibrating gas analysers
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D11/00—Control of flow ratio
- G05D11/02—Controlling ratio of two or more flows of fluid or fluent material
- G05D11/13—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means
- G05D11/135—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by sensing at least one property of the mixture
- G05D11/138—Controlling ratio of two or more flows of fluid or fluent material characterised by the use of electric means by sensing at least one property of the mixture by sensing the concentration of the mixture, e.g. measuring pH value
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Automation & Control Theory (AREA)
- Dispersion Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a kind of high humidity low concentration dust generators, are mainly made of air compressor machine (1), atomising device (3), sample gas heating device (6), sample gas detection device, dilution heating device (16), other gas distribution equipments (17) and flow control system；The flow control system includes sample introduction volume control device (2), sampling flow control device (14) and dilution flow rate control device (15)；The sample gas detection device is successively arranged air outlet (10), observation ward (9), inlet air plenum (7) and waste liquid export room (8) from top to bottom.The present invention compares tradition machinery operation preparation dust, operation stability is stronger, and concentration controllability is stronger, and more evenly, concentration generates more stable dust size by imitating " minimum discharge " dust collecting process process, especially mixed liquor atomization design.
Description
Technical field
The invention belongs to environmental protection test equipment technical fields, and in particular to a kind of high humidity low concentration dust generator.
Background technique
With the adjustment and reform of China's expanding economy and the industrial structure, Industrial Boiler, boiler of power plant and Industrial Stoves etc.
Problem of environmental pollution caused by pollution sources is further prominent, and wherein dust pollution is especially serious.In recent years, domestic coal-burning power plant
The gradually implementation of " minimum discharge " transformation is implemented, and mainly passes through bag-type dust (or electric precipitation) collaboration wet process to the improvement of dust
Desulfurization, wet electric dust-removing process, cause state's presence of pollution sources dust emission that low concentration, high humility complex conditions is presented, and on-line monitoring is difficult
It spends larger.Existing mainstream on-line monitoring product needs to carry out high-temperature gasification pretreatment to the high wet dust after sampling, to eliminate
Influence of the drop to measurement.All kinds of monitoring products need to carry out factory gauging calibration, but manufacturer be difficult to provide high humidity it is low dense
As factory test environment, the gauging calibration that causes to dispatch from the factory loses specific meaning for the operating condition of degree, and affect that instrument scene uses has
Effect property.And it is more sensitive to color, the particle size of dust using the device of optical method measurement, and under different operating condition dust face
For the indexs such as color there is also larger difference, these meterings all to dust on-line monitoring equipment bring difficulty.How preferably to simulate
The dust state of real working condition is reproduced, gauging calibration preferably is carried out to on-line monitoring equipment, becomes industry difficult point.
Chinese invention patent CN201310140290.5 discloses a kind of dust environment simulation equipment, including dust fills
It sets, wind-tunnel, deduster and blower, which can simulate the dust atmosphere of even concentration, and concentration is adjustable, utilize
The test structure that the test that the analog machine carries out product obtains is more accurate.The device can only simulate dry dust environment, uncomfortable
It should be in the simulation of high humidity low concentration dust operating condition.
Chinese invention patent CN201710590451.9 discloses dust, smoke diffusing simulating device in a kind of flue, packet
Include centrifugal blower one, pipeline, air conveyor, steam evaporator, standard gas bottle rack, dust generator and control cabinet.It should
Device generates wet dust by dust and vapor mixing, fails the dust of real simulation wet desulphurization or wet electric precipitation scene
Operating condition, and device fabrication is more complex.
In conclusion there is the dust work for being difficult to real simulation wet desulphurization or wet electric precipitation scene in prior art
The problems such as condition, is not suitable for the simulation of high humidity low concentration dust operating condition, and complicated there are device fabrication.
Summary of the invention
It is an object of the invention in view of the deficienciess of the prior art, providing a kind of completely new high humidity low concentration dust
Generating device.The present invention can imitate " minimum discharge " dust collecting process process, produce high humility dust, produce and more meet now
The dust atmosphere of field operating condition.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of high humidity low concentration dust generator, mainly by air compressor machine, atomising device, sample gas heating device, sample gas detection dress
It sets, dilute heating device, other gas distribution equipments and flow control system composition；The flow control system includes master control
Device and the sample introduction volume control device being connected respectively with main controller, sampling flow control device and dilution flow rate control dress
It sets；Sample introduction volume control device, sampling flow control device and dilution flow rate control device are controlled by main controller.The master
Device is controlled by the operation such as STM32F4 chip controls heating device, solenoid valve, flowmeter, supersonic generator, realizes sample introduction flow
Control, sampling flow control dilution flow rate control and dust generation rate.The sample gas detection device is successively set from top to bottom
There are air outlet, observation ward, inlet air plenum and waste liquid export room；The mixing for containing mixed liquor is equipped with inside the atomising device
Sap cavity；The atomising device is additionally provided with air inlet pipe and the gas outlet at top is arranged in, and wherein one end of air inlet pipe is located at mixing
In the mixed liquor of sap cavity, the other end is connected by sample introduction volume control device with the air taking port of air compressor machine；The sample gas adds
It is equipped with dilution chamber inside thermal, and dilution chamber sets that there are two air inlet and a gas outlets；One of them of dilution chamber into
Port is connected with the gas outlet of atomising device, another air inlet is connected with the gas outlet of dilution heating device, dilution chamber
Gas outlet be connected with inlet air plenum；The air inlet of the dilution heating device passes through dilution flow rate control device and air compressor machine
Air taking port be connected；The air inlet of the dilution heating device is also connected with other gas distribution equipments；The sight
The top for examining room is equipped with sensor of dust concentration and filter membrane sampling device, and filter membrane sampling device is controlled by sampling flow and filled
It sets and is connected with the bleeding point of air compressor machine；The sensor of dust concentration real-time detection observes indoor dust concentration, and passes
It is defeated by main controller；The observation ward is additionally provided with window, tests product to be tested for being put into.
Further explanation or improvement as technical solution of the present invention: the air outlet of the sample gas detection device is also connected with
There is an air exhausting device.Air exhausting device generates tiny structure, and guidance heating gaseous mixture is arranged by inlet air plenum and observation ward by air outlet
Out.Heat gaseous mixture during rising, part vapor can be condensed under water droplet fall on waste liquid export room collect, waste liquid is led
Room needs periodically to be cleaned out.Similar smoke stack emission exhaust gas process is designed herein.
Further explanation or improvement as technical solution of the present invention: the mixed liquor is the mixed liquor of dust and water,
And the quality proportioning by controlling them carries out control dust concentration.The dust is the flue dust collecting of discharged from coal-fired boiler
And the dust come, it can really reflect the dust state at scene.
Further explanation or improvement as technical solution of the present invention: the atomising device carries out at atomization mixed liquor
Reason generates water mist (can refer to desulfurizing tower design scheme) specifically by nozzle spray or handles production by ultrasonic ultrasonic delay line memory
Unboiled water mist.By controlling atomization speed, dust and humidity concentration can be regulated and controled.
Further explanation or improvement as technical solution of the present invention: other described gas distribution equipment output contamination gases
Body, polluted gas include SO2,NO,CO.Other gas distribution equipments can import SO2, polluted gas and the high humility dust such as NO
Mixing, the discharge operating condition at more true reflection scene.
In the present invention, dust generator is mainly supplied by air compressor machine.Pass through sample introduction volume control device and dilution
Volume control device controls sample gas concentration, realizes dust concentration and the accurate fast tunable of humidity.After sample introduction volume control device
Air inlet needs to be embedded in mixed liquor, preferably mixes with water mist, while can play the role of stirring.After the water mist and heating
Carrier gas be mixed into sample gas heating device.Sample gas heating device is similar to flue gas-smoke re-heater in smoke gas treatment process
(GGH) function realizes vaporization, wherein heating temperature can be set to mixing water mist preheating.
In the present invention, observation ward's design has window to be put into test convenient for product to be tested.Observation ward top
Be placed with sensor of dust concentration and filter membrane sampling device, wherein sensor of dust concentration can real-time detection go out concentration inside, and
It can realize that closed loop regulates and controls dust concentration by modes such as control front end airflow thinner ratios, so as to more accurately obtain a certain concentration
Uniform dust atmosphere.Filter membrane sampling device carries out the sampling of sample gas by the control of sampling flow control device, becomes dust concentration
The tracing basis that weighing compares.
After above-mentioned technical proposal, the present invention more really reflects live powder by simulation concrete technology flow process
Dirt emission status provides high humidity low concentration dust detection demand environment.Mixed liquor is accurately configured by using live flue dust, instead
Live true flue dust situation is reflected.By controlling atomising device atomization speed, sample introduction volume control device and diluent stream are controlled
The uninterrupted of amount control device quickly can accurately obtain the dust atmosphere and different psychrometric conditions of a certain even concentration,
And closed-loop control is realized by sensor of dust concentration.The present apparatus can simulate site environment, can continuously provide meter for a long time
The condition for measuring calibration, is provided and can be filled with the experiment of reference for the formulation of national standard and measurement verification regulations and calibrating standard
It sets.
Main innovation of the invention, which is selected, to be: 1. configure the mixed liquor of dust and water by quality, are atomized by mixed liquor
The gaseous mixture of water and dust is generated, dust is the flue dust collecting of discharged from coal-fired boiler herein.2. mixed liquor atomization includes spray
Mouth sprays atomization, ultrasonic atomization etc., compares tradition machinery operation preparation dust, stability is stronger, and controllability is stronger, dust grain
More evenly, concentration control is more stable for diameter.3. sample introduction flow and dilution flow rate are controlled by control mixed liquor atomization speed, it can be fast
The fast dust and humidity for accurately modulating various concentration.4. increasing sample gas heating device and carrier gas heating device, steam is realized
It is live more to meet scene discharge for content and sample gas temperature-controllable.It is then mixed with water mist 5. sample introduction flow is passed through inside mixed liquor,
Play stirring action, alternative tradition machinery stirring design.6. other polluted gas can be imported, the discharge at true reflection scene
Operating condition.
In the present invention, atomising device, sample gas heating device, dilution heating device, other gas distribution equipments and flow
The components such as control system can directly buy acquisition on the market or carry out conventional set according to conventional technical means in the art
Meter, without being specifically designed.
Compared with prior art, advantages of the present invention:
1. the present invention simulates coal-fired pot by discharging upwards after reheating vaporization after being atomized the mixed liquor of dust and water
The desulfurization process of furnace dust collecting process, heating procedure, smoke stack emission process etc., the live high humidity low concentration dust work of true reappearance
Condition.
2. invention increases the designs of carrier gas adjustment sample gas concentration.
3. the present invention is by imitating " minimum discharge " dust collecting process process, especially mixed liquor atomization design, comparison tradition
Mechanically actuated prepares dust, and operation stability is stronger, and concentration controllability is stronger, and more evenly, concentration control is more stable for dust size.
Detailed description of the invention
Fig. 1 is the overall structure diagram of one embodiment of the invention.
Appended drawing reference: 1- air compressor machine；2- sample introduction volume control device；3- atomising device；4- mixing sap cavity；5- dilution chamber；
6- sample gas heating device；7- inlet air plenum；8- waste liquid exports room；9- observation ward；10- air outlet；11- air exhausting device；12- dust is dense
Spend sensor；13- filter membrane sampling device；14- sampling flow control device；15- dilution flow rate control device；16- dilution heating
Device；Other gas distribution equipments of 17-.
Specific embodiment
The following further describes the present invention with reference to the drawings.
Embodiment:
As shown in Figure 1, a kind of high humidity low concentration dust generator, mainly by air compressor machine 1, atomising device 3, sample gas heating device
6, sample gas detection device, dilution heating device 16, other gas distribution equipments 17, air exhausting device 11 and flow control system group
At；The control system includes main controller and the sample introduction volume control device 2, the sampling flow that are connected respectively with main controller
Control device 14 and dilution flow rate control device 15；The sample gas detection device is successively arranged air outlet 10 from top to bottom, sees
Examine room 9, inlet air plenum 7 and waste liquid export room 8；Air outlet 10 is connected with air exhausting device 11；It is equipped with inside the atomising device 3
For containing the mixing sap cavity 4 of mixed liquor；The atomising device 3 is additionally provided with air inlet pipe and the gas outlet at top is arranged in,
One end of middle air inlet pipe is located in the mixed liquor of mixing sap cavity 4, and the other end passes through sample introduction volume control device 2 and air compressor machine 1
Air taking port is connected；The mixed liquor is the mixed liquor of dust and water, and can be carried out by controlling their quality proportioning
Dust concentration is controlled, dust is the flue dust collecting of discharged from coal-fired boiler and next dust；Atomising device 3 carries out ultrasound to mixed liquor
Wave atomization process generates water mist.
It is equipped with dilution chamber 5 inside the sample gas heating device 6, and dilution chamber 5 sets that there are two air inlet and one to go out
Port；One of air inlet of dilution chamber 5 is connected with the gas outlet of atomising device 3, another air inlet and dilution are heated
The gas outlet of device 16 is connected, and the gas outlet of dilution chamber 5 is connected with inlet air plenum 7；The described dilution heating device 16 into
Port is connected by dilution flow rate control device 15 with the air taking port of air compressor machine 1；The air inlet of the dilution heating device 16
Mouth is also connected with other gas distribution equipments 17；The top of the observation ward 9 is equipped with sensor of dust concentration 12 and filter membrane
Sampling apparatus 13, and filter membrane sampling device 13 is connected by sampling flow control device 14 with the bleeding point of air compressor machine 1；Institute
The dust concentration in 12 real-time detection observation ward 9 of sensor of dust concentration stated, and it is transferred to main controller；The observation ward 9
It is additionally provided with window, tests product to be tested for being put into.
Other gas distribution equipments 17 of the present embodiment can import SO2, the polluted gas such as NO, CO and high humility dust it is mixed
It closes, the discharge operating condition at more true reflection scene.
Specific embodiment described herein is only to give an example to the present invention.The technical field of the invention
Technical staff can make various modifications or additions to the described embodiments or be substituted in a similar manner, but
Without departing from the spirit of the invention or going beyond the scope defined by the appended claims.
Claims (6)
1. a kind of high humidity low concentration dust generator, it is characterised in that: mainly by air compressor machine (1), atomising device (3), sample gas
Heating device (6), sample gas detection device, dilution heating device (16), other gas distribution equipments (17) and flow control system
Composition；
The flow control system include main controller and the sample introduction volume control device (2) being connected respectively with main controller,
Sampling flow control device (14) and dilution flow rate control device (15)；
The sample gas detection device is successively arranged air outlet (10), observation ward (9), inlet air plenum (7) and waste liquid from top to bottom and leads
Room (8) out；
The mixing sap cavity (4) for containing mixed liquor is equipped with inside the atomising device (3)；The atomising device (3) is also
Equipped with air inlet pipe and the gas outlet that top is arranged in, wherein one end of air inlet pipe is located in the mixed liquor of mixing sap cavity (4), another
End is connected by sample introduction volume control device (2) with the air taking port of air compressor machine (1)；
Dilution chamber (5) are equipped with inside the sample gas heating device (6), and dilution chamber (5) sets that there are two air inlet and one
Gas outlet；One of air inlet of dilution chamber (5) is connected with the gas outlet of atomising device (3), another air inlet with it is dilute
The gas outlet for releasing heating device (16) is connected, and the gas outlet of dilution chamber (5) is connected with inlet air plenum (7)；
The air inlet of the dilution heating device (16) passes through the air taking port of dilution flow rate control device (15) and air compressor machine (1)
It is connected；The air inlet of the dilution heating device (16) is also connected with other gas distribution equipments (17)；
The top of the observation ward (9) is equipped with sensor of dust concentration (12) and filter membrane sampling device (13), and filter membrane is adopted
Sampling device (13) is connected by sampling flow control device (14) with the bleeding point of air compressor machine (1)；The dust concentration passes
Dust concentration in sensor (12) real-time detection observation ward (9), and it is transferred to main controller；The observation ward (9) is additionally provided with window
Mouthful, product to be tested is tested for being put into.
2. high humidity low concentration dust generator according to claim 1, it is characterised in that: the sample gas detection device
Air outlet (10) be also connected with an air exhausting device.
3. high humidity low concentration dust generator according to claim 1, it is characterised in that: the mixed liquor is dust
With the mixed liquor of water, and control dust concentration is carried out by controlling their quality proportioning.
4. high humidity low concentration dust generator according to claim 3, it is characterised in that: the dust is coal-fired pot
Flue dust collecting that fire grate is put and the dust come.
5. high humidity low concentration dust generator according to claim 1, it is characterised in that: the atomising device (3)
Atomization process is carried out to mixed liquor, generate water mist specifically by nozzle spray or generation water is handled by ultrasonic ultrasonic delay line memory
Mist.
6. high humidity low concentration dust generator according to claim 1, it is characterised in that: other described gas distributions
Device (17) output polluted gas, polluted gas includes SO2、NO、CO。
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