CN108693090A - A kind of granule density measuring device for high temperature oil-containing dusty gas - Google Patents
A kind of granule density measuring device for high temperature oil-containing dusty gas Download PDFInfo
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- CN108693090A CN108693090A CN201810555424.2A CN201810555424A CN108693090A CN 108693090 A CN108693090 A CN 108693090A CN 201810555424 A CN201810555424 A CN 201810555424A CN 108693090 A CN108693090 A CN 108693090A
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- dusty gas
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- 239000008187 granular material Substances 0.000 title claims abstract description 18
- 238000005070 sampling Methods 0.000 claims abstract description 86
- 238000010438 heat treatment Methods 0.000 claims abstract description 43
- 239000000428 dust Substances 0.000 claims abstract description 35
- 238000009413 insulation Methods 0.000 claims abstract description 33
- 238000010791 quenching Methods 0.000 claims abstract description 33
- 230000000171 quenching effect Effects 0.000 claims abstract description 33
- 239000002245 particle Substances 0.000 claims abstract description 32
- 238000005259 measurement Methods 0.000 claims abstract description 31
- 238000009434 installation Methods 0.000 claims abstract description 4
- 238000009833 condensation Methods 0.000 claims description 36
- 230000005494 condensation Effects 0.000 claims description 36
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 30
- 230000003068 static effect Effects 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 8
- 239000007789 gas Substances 0.000 description 85
- 239000011269 tar Substances 0.000 description 37
- 238000005516 engineering process Methods 0.000 description 11
- 239000003245 coal Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 9
- 239000003034 coal gas Substances 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 229920000742 Cotton Polymers 0.000 description 4
- 239000012530 fluid Substances 0.000 description 4
- 239000011435 rock Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000013618 particulate matter Substances 0.000 description 3
- 238000004321 preservation Methods 0.000 description 3
- 238000000197 pyrolysis Methods 0.000 description 3
- 238000004781 supercooling Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005485 electric heating Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- 230000002631 hypothermal effect Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000010453 quartz Substances 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000000699 topical effect Effects 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000003189 isokinetic effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Classifications
-
- 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
- G01N15/06—Investigating concentration of particle suspensions
Abstract
The present invention relates to a kind of granule density measuring devices for high temperature oil-containing dusty gas, include dust particles sampling unit, fractional condensaion unit, low temperature quenching unit and the aspiration pump being sequentially connected to by pipeline;Pipeline between the low temperature quenching unit and aspiration pump is equipped with flowmeter;The dust particles sampling unit includes the first heating and thermal insulation unit on the outside of sampling head, sampling pipe and sampling pipe;The accommodating chamber of quartzy filter cylinder and the quartzy filter cylinder of installation is equipped in the sampling pipe.The device can carry out the dust particles in high temperature oil-containing dusty gas sampling and accurate measurement dust concentration, be furthermore possible to that tar is avoided to condense on flowmeter and aspiration pump.
Description
Technical field
The present invention relates to particle sampling and apparatus for measuring concentration in gas, and in particular to one kind being used for high temperature oil-containing ash-laden gas
The granule density measuring device of body.
Background technology
Coal poly-generation technology based on coal pyrolysis is a kind of important technical of coal high-efficiency clean utilization,
Pyrolytic gasification is carried out to the coal rich in volatile matter under high temperature environment, can get coal gas, tar and semicoke, coal gas is through dividing
High-quality gaseous fuel is can get from purification, tar can get the chemical products of high-quality by further deep processing, and semicoke can
It is directly used in combustion power generation, to realize coal staged conversion clean utilization, is had broad application prospects.
Containing particulate matters such as a large amount of flying dust, coals in the raw gas that coal is generated through pyrolytic gasification, currently to these
The technical way that is removed of grain object be high temperature oil-containing dust-laden coal gas is sent directly into chilling tower it is cooling, by tar and
Dust removes together.However, this particulate matter removing method can cause in tar, dustiness is excessively high, is unfavorable for the follow-up profit of tar
With, and then limit the heavy industrialization application of coal poly-generation technology.
High temperature oil-containing dusty gas dedusting technology is a kind of technology removed under high temperature environment to particulate matter, including
High-temp. vortex isolation technics, Bed Filtration technology and high temperature electrostatic dedusting technology etc..High-temp. vortex isolation technics is to utilize
Generated centrifugal force when dusty gas progress high speed rotation, the cleaner that solid is separated from gas, but it is high
Warm Cyclone Separation Technology is invalid to the particle of small grain size, therefore can only generally be used as pre- cleaner.High temperature electrostatic dedusting technology is
Under high-pressure electrostatic force effect, after so that ash grit is carried negative electrical charge, under the action of electric field force, to the pole plate side with positive charge
To movement, but there are problems for the stability and thermal expansion of material when electrostatic precipitator technology is run at high temperature under high pressure at present.
High temperature oil-containing dusty gas has that temperature is high (400 DEG C or more), containing easy condensed gas (condensation temperature range is wide,
350 DEG C or so begin to condense) the characteristics of.Sampling is being carried out to particulate matter and when measurement of concetration, tar condensing can cause acquisition/
Contain more tar liquid on the dust particles of measurement, influences the accuracy for sampling and measuring, in addition to this, tar is in flowmeter
And condensed on aspiration pump, instrument can be damaged, causes to sample and measurement work can not be normally carried out.
Traditional flue gas sampling and concentration measurement system is for not oil-containing and the lower flue gas of temperature, and for oil-containing
Dust-laden high-temperature gas samples well not yet and measurement means.As Chinese invention patent application (107144505 A of CN) is open
A kind of measuring device of wet flue gas dust, including unit is used, it is used to acquire the wet flue gas in flue;And measuring unit,
It is connected to the sampling unit, and for being measured to the dust weight in the wet flue gas after acquisition.Due in structure
Limitation, which is only used for carrying out on-line measurement and sampled measurements to the tail portion wet flue gas of coal-burning power plant, and is not used to height
The measurement of warm oil-containing dusty gas.
In view of drawbacks described above, it is necessary to provide a kind of particle sampling for high temperature oil-containing dusty gas and measurement of concetration system
System.
Invention content
In view of the above-mentioned deficiencies in the prior art, it is an object of the present invention to provide a kind of particle for high temperature oil-containing dusty gas
Apparatus for measuring concentration can carry out the dust particles in high temperature oil-containing dusty gas sampling and accurate measurement dust concentration, this
Tar can be avoided to be condensed on flowmeter and aspiration pump outside.
Technical solution provided by the present invention is:
A kind of granule density measuring device for high temperature oil-containing dusty gas includes the dust being sequentially connected to by pipeline
Particle sampling unit, fractional condensaion unit, low temperature quenching unit and aspiration pump;Between the low temperature quenching unit and aspiration pump
Pipeline be equipped with flowmeter;
The dust particles sampling unit includes the first heating and thermal insulation list on the outside of sampling head, sampling pipe and sampling pipe
Member;The accommodating chamber of quartzy filter cylinder and the quartzy filter cylinder of installation is equipped in the sampling pipe.
The first heating and thermal insulation unit is equipped in the present invention on the outside of sampling pipe, the first heating and thermal insulation unit carries out sampling pipe auxiliary
Help heating and heat preservation, it is ensured that entire sampling process carries out in high temperature (being more than 400 DEG C) environment, makes in high temperature oil-containing dusty gas
Condensable component exists in a gaseous form, and avoiding tar condensing from causing, dust particles sample and measurement process can not carry out.
Preferably, the first heating and thermal insulation unit includes electric heating mechanism and insulating layer, by adjusting electrical heating work(
Rate ensures sampling pipe temperature at 400 DEG C or more, it is ensured that tar will not condense in pipe, influence sampled measurements precision and stability.
The material selection rock cotton board of insulating layer, thickness 100-200mm, control insulating layer temperature outside are not higher than 50 DEG C.It is further excellent
Choosing, the first heating and thermal insulation unit use detachable structure, facilitate the handling of quartzy filter cylinder in sampling pipe, such as screw thread, card
Buckle structure etc..
Fractional condensaion unit can ensure that high temperature oil-containing gases by condensation point difference fractional condensaion, ensure that condensation is burnt in the present invention
The mobility of oil prevents tar supercooling from causing to block in pipe.
Low temperature quenching unit can guarantee that the condensation of condensable component is complete in high temperature oil-containing gases, avoids tar viscous in the present invention
It is attached in flowmeter and aspiration pump, influences equipment stable operation.
The diameter of sampling pipe can be 5-20mm in the present invention, and the diameter of quartzy filter cylinder can be 20-50mm.As excellent
The air inlet junction of choosing, the accommodating chamber and sampling pipe is pyramidal structure.Connected using pyramidal structure between sampling pipe and accommodating chamber
Connect, contribute to reduce dust-contained airflow from sampling pipe to quartzy filter cylinder when due to flow velocity reduces suddenly and caused by turbulent flow, increase powder
The precision of dirt particle sampling.Preferably, the angle of pyramidal structure is no more than 20 °, and smaller coning angle can reduce air-flow process
The turbulent flow of generation.
Heretofore described accommodating chamber uses dismountable structure.Preferably, the accommodating chamber can be by two connecting tubes
It is connected through a screw thread to obtain, one of connecting tube has pyramidal structure.The handling of quartzy filter cylinder may be implemented in the structure, simultaneously
Ensure the leakproofness under high temperature.
Heretofore described fractional condensaion unit is made of 1-5 grades of condensing units, is connected between each other by condenser pipe;Institute
It includes tar receiving flask to state condensing unit, and the condenser pipe on tar receiving flask is arranged, and be arranged on the outside of condenser pipe
Two heating and thermal insulation units.The tar condensed to the cold can be prevented bad in topical hypothermia's area's mobility using fractional condensaion unit, blocked up
Condenser pipe is filled in, to influence the stable operation of sampling apparatus.
According to the condensing temperature and flow behavior of condensable gas in high temperature oil-containing gases, 1-5 grades can be arranged.The classification is cold
Solidifying unit is equipped with 1-5 grades, is connected between each other by condenser pipe.Preferably, between adjacent condensing unit by condense into
Gas end is connected to condensation outlet side.
Preferably, the condenser pipe is three-way pipe, including condensation inlet end, condensation outlet side and tar collecting terminal;Institute
It is tar collecting terminal to state condensation inlet end and use V-shape structure, V-shape structural base with condensation outlet side.1st grade of condensing unit
Condensation inlet end be connected to dust particles sampling unit, the condensation outlet side of the condensing unit of end connects with low temperature quenching unit
It is logical.High temperature oil-containing gases bring out gas from condensation inlet end air inlet, from condensation outlet, and the liquid condensed in the process is due to gravity
Effect is flowed by tar collecting terminal in tar receiving flask.
Preferably, the fractional condensaion unit is equipped with 3 grades, condensation temperature is followed successively by 300 DEG C, 200 DEG C, 100 DEG C.Second
Heating and thermal insulation unit equally includes that heating mechanism and insulating layer ensure that the temperature of condenser pipe is by adjusting heating mechanism power
Temperature is set, and insulating layer uses rock cotton board, thickness 50-150mm, control insulating layer temperature outside to be not higher than 50 DEG C.
Preferably, being sealed using rubber stopper between the tar collecting terminal and tar receiving flask.
Heretofore described low temperature quenching unit includes that the drexel bottle of dichloromethane is housed and is set on the outside of drexel bottle
Low temperature thermostat bath;The condensation outlet side of the condenser pipe is inserted under the dichloromethane liquid level in drexel bottle, and the low temperature is anxious
Cold unit is connected to aspiration pump by exhaust pipe, and the exhaust pipe in drexel bottle is located on dichloromethane liquid level.It is filled in drexel bottle
There is dichloromethane solution, for absorbing through the still uncooled condensable gas of fractional condensaion unit, prevents it in subsequent flow
It is condensed in meter and aspiration pump, influences the normal operation of instrument.Preferably, low temperature thermostat bath set temperature is -10-0 DEG C, ensure
Condensable gas can absorb completely.
Preferably, the aspiration pump is vacuum pump, it to be used for extracting high-temperature oil-containing dusty gas.The aspiration pump connection storage
Gas tank.Coal pyrolysis generate high temperature oil-containing dusty gas in can not coagulate coal gas have the characteristics that it is toxic, explosive, cannot be random
Discharge.Be conducive to prevent the leakage of high-risk coal gas using vacuum pump and air accumulator.
Preferably, the flow is calculated as high-precision mass flowmenter.By measuring the quality of dust in quartzy filter cylinder, with
And flow registration in flowmeter is read, to which dust concentration in high temperature oil-containing dusty gas be calculated.
The heretofore described granule density measuring device for high temperature oil-containing dusty gas further includes that kinetic pressure balancing is surveyed
Measure unit;The kinetic pressure balancing measuring unit includes Pitot tube, differential manometer, thermocouple, total head measurement pipe and static pressure tube;
The Pitot tube, total head measurement pipe are connect with differential manometer respectively with static pressure tube.
Thermocouple for respectively measure oil-containing dusty gas pipeline, and after low temperature quenching unit gas temperature.Skin
Trustship is used to measure the total head and static pressure in high temperature oil-containing dusty gas pipeline, total head measurement pipe and static pressure tube for measuring
The total head and static pressure of gas, are connected between Pitot tube and total head/static pressure tube by differential manometer after low temperature quenching unit, are led to
The power for overregulating vacuum pump changes the speed of gas sampling, when differential manometer balances, shows air velocity and height in sampling pipe
Speed in warm oil-containing dusty gas pipeline is consistent, that is, realizes constant speed measurement.Show to realize constant speed measurement when meeting following formula:
(P0-P0') × β=(P1-P1')
Wherein, P0For the total head that Pitot tube measures, P0'For the static pressure that Pitot tube measures, (P0-P0') it is oil-containing dusty gas
The dynamic pressure of fluid in pipeline;P1For the total head of the gas after low temperature quenching unit, P1'For after low temperature quenching unit gas it is quiet
Pressure, (P1-P1') be after low temperature quenching unit gas dynamic pressure;β is regulation coefficient, and numerical value is determined by following formula:
T0For the temperature (DEG C) of fluid in oil-containing dusty gas pipeline, d0For the internal diameter of sampling head;T1For through low temperature chilling list
The temperature (DEG C) of gas, d after member1For the internal diameter of pipe after low temperature quenching unit.
Pitot tube of the present invention is equipped with third heating and thermal insulation unit.
Preferably, the third heating and thermal insulation unit is arranged in non-measured section of Pitot tube, and the third heating and thermal insulation
Pitot tube between unit and differential manometer keeps exposed.Part external third of the Pitot tube close to high temperature oil-containing dusty gas pipeline
Heating and thermal insulation unit prevents oil-containing dusty gas to be diffused into low-temperature space in Pitot tube, Pitot tube is caused to block;Meanwhile Pitot tube
It keeps exposed close to the part of differential manometer, prevents the portion temperature being connect with differential manometer too high, differential manometer is damaged.Its
In, non-measured section refers to the part not entered in high temperature oil-containing dusty gas pipeline.
Compared with the existing technology, beneficial effects of the present invention are embodied in:
(1) dust particles sampling unit carries out auxiliary heating and heat preservation to sampling pipe in the present invention, it is ensured that entirely sampled
Journey carries out in high temperature (being more than 400 DEG C) environment, so that condensable component in high temperature oil-containing dusty gas is existed in a gaseous form, keeps away
Exempting from tar condensing causes dust particles sampling and measurement process that can not carry out.
(2) fractional condensaion unit can ensure that high temperature oil-containing gases by condensation point difference fractional condensaion, ensure cold in the present invention
The mobility of solidifying tar prevents tar supercooling from causing to block in pipe.
(3) low temperature quenching unit can guarantee that the condensation of condensable component is complete in oil-containing gases, avoids tar viscous in the present invention
It is attached in flowmeter and vacuum pump, influences equipment stable operation.
(4) ensure the essence of sampling process using kinetic pressure balancing isokinetic sampling equipped with kinetic pressure balancing measuring unit in the present invention
True property.
Description of the drawings
Fig. 1 is the structural schematic diagram of embodiment middle particle concentration measuring device;
Fig. 2 is the partial structural diagram of dust particles sampling unit in embodiment;
Fig. 3 is the structural schematic diagram of fractional condensaion unit in embodiment.
Wherein, 1, dust particles sampling unit;101, sampling pipe;102, accommodating chamber;103, sampling head;104, quartz filter
Cylinder;105, the first heating and thermal insulation unit;106, air inlet junction;2, fractional condensaion unit;201, inlet end is condensed;202, it condenses
Outlet side;203, the second heating and thermal insulation unit;204, tar receiving flask;205, tar collecting terminal;3, low temperature quenching unit;301,
Drexel bottle;302, low temperature thermostat bath;303, exhaust pipe;4, kinetic pressure balancing measuring unit;401, differential manometer;402, Pitot tube;
403, static pressure tube;404, total head measurement pipe;405, third heating and thermal insulation unit;5, flowmeter;6, vacuum pump;7, gas storage
Tank;8, high temperature oil-containing dusty gas pipeline.
Specific implementation mode
The invention will be further described in the following with reference to the drawings and specific embodiments, but protection scope of the present invention and unlimited
In this.
As shown in Figure 1, the granule density measuring device for high temperature oil-containing dusty gas includes dust particles sampling unit
1, fractional condensaion unit 2, low temperature quenching unit 3, kinetic pressure balancing measuring unit 4, flowmeter 5, vacuum pump 6 and air accumulator 7.Its
In, dust particles sampling unit 1, fractional condensaion unit 2, low temperature quenching unit 3, vacuum pump 6 and air accumulator 7 pass sequentially through pipe
Road is connected to.Pipeline between low temperature quenching unit 3 and vacuum pump 6 is equipped with flowmeter 5, and flowmeter 5 is high-precision mass flow
Meter, by measuring flow registration in the quality of dust in quartzy filter cylinder 104, and reading flowmeter 5, to which high temperature be calculated
Dust concentration in oil-containing dusty gas.
Dust particles sampling unit 1 includes that first heating in 101 outside of sampling head 103, sampling pipe 101 and sampling pipe is protected
Warm unit 105, the interior accommodating chamber 102 for being equipped with quartzy filter cylinder 104 and installation quartz filter cylinder 104 of sampling pipe 101.Granule density is surveyed
When measuring device work, sampling head 103 is mounted in high temperature oil-containing dusty gas pipeline 8, and other structures then may be mounted at pipeline
Outside.
The diameter of sampling pipe 101 can be 5-20mm, and the diameter of quartzy filter cylinder 104 can be 20-50mm.Accommodating chamber 102
Air inlet junction 106 with sampling pipe 101 is pyramidal structure, and angle is no more than 20 °.It is adopted between sampling pipe 101 and accommodating chamber 102
Connected with pyramidal structure, when helping to reduce dust-contained airflow from sampling pipe 101 to quartzy filter cylinder 104 since flow velocity reduces suddenly and
Caused by turbulent flow, increase dust particles sampling precision.
Sampling head 103, the sampling pipe 101 of dust particles sampling unit 1 can use heat-resisting alloy steel or 310S stainless
Steel is realized and stablizes sampling and measurement under hot conditions.
As shown in Fig. 2, accommodating chamber 104 is connected through a screw thread to obtain by two connecting tubes, one of connecting tube has cone
The handling of quartzy filter cylinder 104 may be implemented in shape structure, the structure, while ensureing the leakproofness under high temperature.
101 outside of sampling pipe is equipped with the first heating and thermal insulation unit 105.First heating and thermal insulation unit 105 includes electrical heating
Mechanism and insulating layer ensure 101 temperature of sampling pipe at 400 DEG C or more, it is ensured that tar will not be in pipe by adjusting electrical heating power
Interior condensation influences sampled measurements precision and stability.The material selection rock cotton board of insulating layer, thickness 100-200mm, control are protected
Warm layer temperature outside is not higher than 50 DEG C.In addition, the first heating and thermal insulation unit 105 uses detachable structure, facilitate in sampling pipe 101
The handling of quartzy filter cylinder 104, detachable structure alternative such as screw thread, buckle structure etc..
As shown in figure 3, the series connection of fractional condensaion unit 2 is equipped with three-level condensing unit, due to every level-one condensing unit structure phase
It is same therefore only to introduce wherein level-one.Condensing unit includes tar receiving flask 204, and the condenser pipe on tar receiving flask 204 is arranged,
And the second heating and thermal insulation unit 203 being arranged on the outside of condenser pipe.Condenser pipe is three-way pipe, including condensation inlet end 201, cold
Solidifying outlet side 202 and tar collecting terminal 205;It condenses inlet end 201 and uses V-shape structure, V-shape knot with condensation outlet side 202
Structure bottom is tar collecting terminal 205.It is sealed using rubber stopper between tar collecting terminal 205 and tar receiving flask 204.
Adjacent three-level condensing unit is connected to by condensing inlet end 201 with condensation outlet side 202 between each other.The first order
The condensation inlet end 201 of condensing unit is connected to dust particles sampling unit 1, the condensation outlet side 202 of third level condensing unit
It is connected to low temperature quenching unit 3.Using fractional condensaion unit 2 can prevent the tar condensed to the cold topical hypothermia's area's mobility not
It is good, pipeline is blocked, to influence the stable operation of sampling apparatus.
Fractional condensaion unit 2 is equipped with three group of second heating and thermal insulation unit 203, and condensation temperature is followed successively by 300 DEG C, 200 DEG C,
100℃.Second heating and thermal insulation unit 2 equally includes that heating mechanism and insulating layer ensure condensation by adjusting heating mechanism power
The temperature of inlet end 201 and condensation outlet side 202 is setting temperature, and insulating layer uses rock cotton board, thickness 50-150mm, control to protect
Warm layer temperature outside is not higher than 50 DEG C.
Low temperature quenching unit 3 includes the low temperature that the drexel bottle 301 of dichloromethane is housed and is set in 301 outside of drexel bottle
Thermostat 302.The condensation outlet side 202 of third level condensing unit is inserted under the dichloromethane liquid level in drexel bottle 301, gas washing
Bottle 301 is connected to vacuum pump 6 by exhaust pipe 303, and the exhaust pipe 303 in drexel bottle 301 is located on dichloromethane liquid level.It washes
Dichloromethane solution is housed in gas cylinder 301, for absorbing through the still uncooled condensable gas of fractional condensaion unit 2, prevents it
It is condensed in subsequent flowmeter 5 and vacuum pump 6, influences the normal operation of instrument.Preferably, low temperature thermostat bath set temperature
It is -10-0 DEG C, ensures that condensable gas can absorb completely.
Kinetic pressure balancing measuring unit 4 includes Pitot tube 402, and differential manometer 401, thermocouple, total head measurement pipe 404, static pressure are surveyed
Buret 403 and third heating and thermal insulation unit 405.402 one end of Pitot tube is mounted in high temperature oil-containing dusty gas pipeline 8,
His structure then may be mounted on the outside of pipeline.Wherein, Pitot tube 402, total head measurement pipe 404 and static pressure tube 403 respectively with
Differential manometer 401 connects, and total head measurement pipe 404 is then connected respectively to the exhaust after low temperature quenching unit 3 with static pressure tube 403
Pipe 303.
Thermocouple for measuring high temperature oil-containing dusty gas pipeline 8 respectively, and after low temperature quenching unit 3 gas temperature
Degree.Pitot tube is used to measure the total head and static pressure, total head measurement pipe 404 and static pressure measurement in high temperature oil-containing dusty gas pipeline 8
Pipe 403 is used to measure the total head and static pressure of the gas after low temperature quenching unit 3, between Pitot tube 402 and total head/static pressure tube
It is connected by differential manometer 401, the speed that the power by adjusting vacuum pump 6 changes gas sampling shows when differential manometer balances
Air velocity is consistent with the speed in high temperature oil-containing dusty gas pipeline 8 in sampling pipe 101, that is, realizes constant speed measurement.Meet
Show to realize constant speed measurement when following formula:
(P0-P0') × β=(P1-P1')
Wherein, P0For the total head that Pitot tube 402 measures, P0'For the static pressure that Pitot tube 402 measures, (P0-P0') contain for oil-containing
The dynamic pressure of fluid in dirt gas pipeline 8;P1For the total head of the gas after low temperature quenching unit 3, P1'For after low temperature quenching unit 3
The static pressure of gas, (P1-P1') be after low temperature quenching unit 3 gas dynamic pressure;β is regulation coefficient, and numerical value is determined by following formula:
T0For the temperature (DEG C) of fluid in oil-containing dusty gas pipeline 8, d0For the internal diameter of sampling head 103;T1For through low temperature urgency
The temperature (DEG C) of gas, d after cold unit 31For the internal diameter of 3 heel row tracheae 303 of low temperature quenching unit.
Third heating and thermal insulation unit 405 is arranged on 402 non-measured sections of Pitot tube, including electric heating mechanism and insulating layer.
Pitot tube 402 between third heating and thermal insulation unit 405 and differential manometer 401 keeps exposed.Pitot tube 402 contains close to high temperature oil-containing
The external third heating and thermal insulation unit 405 in part of dirt gas pipeline 8, prevents oil-containing dusty gas to be diffused into low in Pitot tube 402
Warm area causes Pitot tube 402 to block;Meanwhile Pitot tube 402 keeps exposed close to the part of differential manometer 401, prevents and differential manometer
The portion temperature of 401 connections is too high, is damaged to differential manometer 401.Wherein, non-measured section refers to not entering high temperature oil-containing dust-laden
Part in gas pipeline 8.
Coal pyrolysis generate high temperature oil-containing dusty gas in can not coagulate coal gas have the characteristics that it is toxic, explosive, cannot
Arbitrarily discharge.Vacuum pump 6 connects air accumulator 7, is conducive to prevent the leakage of high-risk coal gas using vacuum pump 6 and air accumulator 7.
The course of work is as follows:
As shown in Figure 1, high temperature oil-containing dusty gas flows in high temperature oil-containing dusty gas pipeline 8 along the directions A.It opens
Vacuum pump 6, high temperature oil-containing dusty gas passes through sampling head 103, sampling pipe 101 and air inlet junction 106, into accommodating chamber
In quartzy filter cylinder 104 in 102, while the power of the first heating and thermal insulation unit 105 is adjusted, ensures that temperature is tieed up in sampling pipe 101
It holds at 400-450 DEG C, it is ensured that tar will not condense in sampling pipe 101 and quartzy filter cylinder 104.
High temperature oil-containing dusty gas is stayed in by quartzy filter cylinder 104, solid dust particle in quartzy filter cylinder 104, and high temperature contains
Oil gas body is gone successively in fractional condensaion unit 2, component grading liquefaction in fractional condensaion unit 2 can be coagulated in gas, and collect
In tar receiving flask 204, condensation inlet end 201 and condensation outlet side 202 are added using the second heating and thermal insulation unit 203
Heat heat preservation prevents the liquid component supercooling of condensation, causes mobility bad, and then blocks sampling condenser pipe, causes entirely to sample
Process can not stablize progress.
The component of coagulating that component and a small amount of non-total condensation can not be coagulated is gone successively in low temperature quenching unit 3, in air-flow
Component (condensing temperature the is higher than 0 DEG C) total condensation in low temperature quenching unit 3 can be coagulated, residue can not coagulate component and enter air accumulator 7
Middle storage.
Total head and static pressure in the measurement high temperature oil-containing dusty gas of kinetic pressure balancing measuring unit 4 pipeline 8 and sampling pipe
Total head and static pressure in 101.Adjust 6 power of vacuum pump so that the dynamic pressure in adjusted high temperature oil-containing dusty gas pipeline 8, with
Dynamic pressure is equal in sampling pipe 101, is measured to reach constant speed.
After the completion of sampling process, the first heating and thermal insulation unit 105 on sampling pipe 101 is dismantled, takes out dust particles sampling
Quartzy filter cylinder 104 in unit 1, the quality for measuring wherein dust particles are calculated in conjunction with the gas flow that flowmeter 5 measures
Go out dust particles mass concentration in high temperature oil-containing dusty gas.The present invention can be accurate in high temperature oil-containing dusty circumstances, stable
Ground measures gas middle particle concentration.
Claims (10)
1. a kind of granule density measuring device for high temperature oil-containing dusty gas, which is characterized in that including by pipeline sequentially
Dust particles sampling unit, fractional condensaion unit, low temperature quenching unit and the aspiration pump of connection;The low temperature quenching unit with
Pipeline between aspiration pump is equipped with flowmeter;
The dust particles sampling unit includes the first heating and thermal insulation unit on the outside of sampling head, sampling pipe and sampling pipe;Institute
State the accommodating chamber that quartzy filter cylinder and the quartzy filter cylinder of installation are equipped in sampling pipe.
2. the granule density measuring device according to claim 1 for high temperature oil-containing dusty gas, which is characterized in that institute
The air inlet junction for stating accommodating chamber and sampling pipe is pyramidal structure.
3. the granule density measuring device according to claim 1 for high temperature oil-containing dusty gas, which is characterized in that institute
It states fractional condensaion unit to be made of 1-5 grades of condensing units, be connected between each other by condenser pipe;The condensing unit includes tar
The condenser pipe on tar receiving flask is arranged in receiving flask, and the second heating and thermal insulation unit being arranged on the outside of condenser pipe.
4. the granule density measuring device according to claim 3 for high temperature oil-containing dusty gas, which is characterized in that institute
It is three-way pipe, including condensation inlet end, condensation outlet side and tar collecting terminal to state condenser pipe;The condensation inlet end be condensed out
It is tar collecting terminal that gas end, which uses V-shape structure, V-shape structural base,.
5. the granule density measuring device according to claim 3 for high temperature oil-containing dusty gas, which is characterized in that institute
It includes the low temperature thermostat bath that the drexel bottle of dichloromethane is housed and is set on the outside of drexel bottle to state low temperature quenching unit;It is described cold
The condensation outlet side of solidifying pipe is inserted under the dichloromethane liquid level in drexel bottle, and the low temperature quenching unit passes through row with aspiration pump
Tracheae is connected to.
6. the granule density measuring device according to claim 1 for high temperature oil-containing dusty gas, which is characterized in that institute
It states accommodating chamber and uses dismountable structure.
7. the granule density measuring device according to claim 1 for high temperature oil-containing dusty gas, which is characterized in that institute
State aspiration pump connection air accumulator.
8. the granule density measuring device according to claim 1 for high temperature oil-containing dusty gas, which is characterized in that also
Including kinetic pressure balancing measuring unit;The kinetic pressure balancing measuring unit includes Pitot tube, differential manometer, thermocouple, total head measurement pipe
And static pressure tube;The Pitot tube, total head measurement pipe are connect with differential manometer respectively with static pressure tube.
9. the granule density measuring device according to claim 8 for high temperature oil-containing dusty gas, which is characterized in that institute
It states Pitot tube and is equipped with third heating and thermal insulation unit.
10. the granule density measuring device according to claim 9 for high temperature oil-containing dusty gas, which is characterized in that
The third heating and thermal insulation unit is arranged in non-measured section of Pitot tube, and between the third heating and thermal insulation unit and differential manometer
Pitot tube keeps exposed.
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| CN111487364A (en) * | 2020-04-23 | 2020-08-04 | 太原理工大学 | System for capturing and collecting chlorine element in coal for analysis and detection |
| CN113866060A (en) * | 2021-10-08 | 2021-12-31 | 华润水泥技术研发（广西）有限公司 | Method for testing concentration of necking dust in smoke chamber |
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