CN106501443A - For testing the test system of sulfur trioxide concentration and its condenser in flue gas - Google Patents

For testing the test system of sulfur trioxide concentration and its condenser in flue gas Download PDF

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Publication number
CN106501443A
CN106501443A CN201610932806.3A CN201610932806A CN106501443A CN 106501443 A CN106501443 A CN 106501443A CN 201610932806 A CN201610932806 A CN 201610932806A CN 106501443 A CN106501443 A CN 106501443A
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China
Prior art keywords
condenser
flue gas
housing
test system
helix tube
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CN201610932806.3A
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Chinese (zh)
Inventor
曹志勇
金东春
李治国
崔亚兵
王万林
周晓耘
刘敏
毛文利
乐园园
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YINENG ELECTRIC TECHNOLOGY Co Ltd HANGZHOU
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YINENG ELECTRIC TECHNOLOGY Co Ltd HANGZHOU
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Priority to CN201610932806.3A priority Critical patent/CN106501443A/en
Publication of CN106501443A publication Critical patent/CN106501443A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/96—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation using ion-exchange
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/302—Sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases

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  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The invention discloses a kind of condenser, including the glass core of housing, the helix tube in housing and the tail end located at helix tube, housing is provided with the through hole for passing in and out housing for circulation fluid.This kind of condenser includes helix tube and glass core, the SO after flue gas enters condenser, in flue gas3Aerosol can be condensed in helix tube, and is hung on the glass wall of helix tube, some SO not condensed at helix tube3Can be caught by glass core, so as to avoid sampling loss, more accurately sulfur trioxide concentration be tested.Meanwhile, the helix tube in the condenser is integrally wrapped up by housing with glass core, can be with precise control condensation temperature, so as to SO by being passed through circulation fluid in the housing3It is condensed, and can avoids the SO in flue gas2Also condense out.The invention also discloses a kind of test system for testing sulfur trioxide concentration in flue gas including above-mentioned condenser, more accurately can test to sulfur trioxide concentration.

Description

For testing the test system of sulfur trioxide concentration and its condenser in flue gas
Technical field
The present invention relates to fuel boiler flue gas pollutant detection technique field, more particularly to a kind of condenser.Additionally, this Bright further relate to a kind of test system for testing sulfur trioxide concentration in flue gas including above-mentioned condenser.
Background technology
In order to control NOx emission, flue gas denitrification system has become the basic equipment of Thermal generation unit.Generally, coal-fired Contain a small amount of SO in unit flue gas3The negative effect brought by electric field operation is less.However, utilizing SCR equipment for denitrifying flue gas SO after processing to flue gas, in flue gas2SO is converted under the catalysis oxidation of SCR catalyst in a large number3, make the SO in flue gas3 It is multiplied, this will aggravate the corrosion of the equipment such as air preheater, desulfurization GGH, chimney, while the SO in flue gas3Can also be used for SCR Unreacted completely NH in denitration3Reaction production hydrogen sulfate ammonia, so that cause the stifled ash of air preheater.Therefore, SO3Oxygenation efficiency is urged in SCR Oxygenation efficiency in agent is to evaluate an important indicator of SCR denitration system, the SO in accurate measurement flue gas3Become increasingly to weigh Will.
In addition, with for controlling SO2Limestone-gypsum method flue gas desulfurization technique the pushing away in coal-burning power plant of China of discharge Wide application, flue gas after desulfurization cause each side's concern immediately to the etching problem of chimney.In order to the corrosion to chimney is carried out effectively Assessment, carry out chimney anticorrosion research, to flue gas after desulfurization in SO3Also accurately must measure.
A kind of SO in typical test flue gas3The method of concentration is control condensation method.However, this kind of method of testing is pushed away The condensing coil that recommends is blank pipe, as the SO in flue gas3When being condensed into aerosol, some SO3Aerosol is got rid of cold On the tube wall of solidifying helix tube, some SO3Aerosol is escaped from from condensation spiral with sampling air flow, causes larger sampling Loss, the result of the test for measuring are less than normal compared with theoretical value more.
Therefore, how more accurately sulfur trioxide concentration to be tested, is that those skilled in the art need to solve at present Technical problem certainly.
Content of the invention
In view of this, it is an object of the invention to provide a kind of condenser, more accurately can enter to sulfur trioxide concentration Row test.It is a further object of the present invention to provide a kind of including above-mentioned condenser for testing sulfur trioxide concentration in flue gas Test system, more accurately can test to sulfur trioxide concentration.
For achieving the above object, the present invention provides following technical scheme：
A kind of condenser, including the glass of housing, the helix tube in the housing and the tail end located at the helix tube Glass core, the housing are provided with the through hole for passing in and out the housing for circulation fluid.
Preferably, thermocouple reserved opening is additionally provided with the housing.
A kind of test system for testing sulfur trioxide concentration in flue gas, including the condensation as described in above-mentioned any one Device.
Preferably, also include：
For the heating sampling gun for extracting flue gas from flue out；
For connecting the sampling flexible pipe of the heating sampling gun and the condenser；
For the drying device that the flue gas to flowing out the condenser is dried；
For measuring the flowmeter of flue gas flow, outlet side of the flowmeter located at the drying device；
For cleaning 80% isopropanol bottle for handling liquid toilet or cosmetic substance of the condenser, the heating sampling gun and the sampling flexible pipe.
Preferably, the heating sampling gun is 240 DEG C to 250 DEG C with the heating temperature range of the sampling flexible pipe.
Preferably, the gas production flow of the test system is 4ml/min.
Preferably, also include the fly-ash filter for the outlet located at the heating sampling gun.
Preferably, also include for analyzing the ion chromatography apparatus of sulfate ion concentration.
The condenser that the present invention is provided includes helix tube and glass core, after flue gas enters condenser, in flue gas SO3Aerosol being condensed in helix tube, and being hung on the glass wall of helix tube, some is not cold at helix tube Solidifying SO3Can be caught by glass core, so as to avoid sampling loss, more accurately sulfur trioxide concentration be tested. Meanwhile, the helix tube in the condenser is integrally wrapped up by housing with glass core, can be with essence by being passed through circulation fluid in the housing Condensation temperature is really controlled, so as to SO3It is condensed, it is to avoid the vapor in flue gas is condensed within the condenser, so as to keep away Exempt from the SO in flue gas2Also condense out.
The test system for testing sulfur trioxide concentration in flue gas including above-mentioned condenser that the present invention is provided, can More accurately sulfur trioxide concentration is tested.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing Accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this Inventive embodiment, for those of ordinary skill in the art, on the premise of not paying creative work, can be with basis The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is the structural representation of the specific embodiment of condenser provided by the present invention.
In Fig. 1,1 is glass core, and 2 is helix tube, and 3 is through hole, and 4 is passage, and 5 is thermocouple reserved opening, and 6 is shell Body.
Specific embodiment
Accompanying drawing in below in conjunction with the embodiment of the present invention, to the embodiment of the present invention in technical scheme carry out clear, complete Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiment.It is based on Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made Embodiment, belongs to the scope of protection of the invention.
The core of the present invention is to provide a kind of condenser, and more accurately sulfur trioxide concentration can be tested.This Another core of invention is to provide a kind of test system for testing sulfur trioxide concentration in flue gas including above-mentioned condenser, More accurately sulfur trioxide concentration can be tested.
Fig. 1 is refer to, Fig. 1 is the structural representation of the specific embodiment of condenser provided by the present invention.
In a kind of specific embodiment of condenser provided by the present invention, including housing 6, the helix tube being arranged in housing 62 With the glass core 1 for being arranged on 2 tail end of helix tube, be provided with the through hole 3 that housing 6 is passed in and out for circulation fluid on housing 6.Generally, Glass core 1 is provided with the multiple holes that pass through can flue gas.
This kind of condenser includes helix tube 2 and glass core 1, the SO after flue gas enters condenser, in flue gas3Can be with Aerosol being condensed in helix tube 2, and being hung on the glass wall of helix tube 2, some is not condensed at helix tube 2 SO3Can be caught by glass core 1, so as to avoid sampling loss, more accurately sulfur trioxide concentration be tested.With When, the helix tube 2 in the condenser and glass core 1 are wrapped up by housing 6 is overall, can be with by being passed through circulation fluid in housing 6 Precise control condensation temperature, so as to SO3It is condensed, it is to avoid the vapor in flue gas is condensed within the condenser, so as to Avoid the SO in flue gas2Also condense out.
Generally, SO3Can be condensate under 70 to 80 DEG C of temperature conditionss on helix tube 2 and glass core 1, this temperature Scope is higher than the aqueous dew point temperature of flue gas, but lower than the acid dew-point temperature of flue gas, the SO in such flue gas2Can directly from cold Pass through in condenser, and SO3It is condensed.
Wherein, circulation fluid can be the water of provided by heat-exchanger pump 80 DEG C or so.Specifically, the flow direction of flue gas and circulation fluid Flow direction can be with conversely, improving condensation effect.Wherein, on housing 6 arrange for flue gas turnover passage 4 be used for follow The through hole 3 of ring liquid turnover can be arranged close to corresponding.
In above-described embodiment, thermocouple reserved opening 5 can also be set on housing 6, so as to the temperature of measurement flue gas, be conducive to Simplify operation.
Except above-mentioned condenser, present invention also offers a kind of including condenser disclosed in above-described embodiment for testing The test system of sulfur trioxide concentration in flue gas, the test system, can accurately to three oxygen as a result of above-mentioned condenser Change sulphur concentration to be tested
In above-described embodiment, test system can also include：
For the heating sampling gun for extracting flue gas from flue out；
For connecting the sampling flexible pipe of heating sampling gun and condenser；
For the drying device that the flue gas to flowing out condenser is dried；
For measuring the flowmeter of flue gas flow, outlet side of the flowmeter located at drying device；
For cleaning 80% isopropanol bottle for handling liquid toilet or cosmetic substance of condenser, heating sampling gun and sampling flexible pipe, wherein different containing 80% Propyl alcohol washing lotion.
Flue gas is extracted by heating sampling gun out from flue, in flue gas, contain SO2And SO3, sampling will be heated with sampling flexible pipe Rifle is coupled together with condenser.SO in flue gas3H is condensed within the condenser can2SO4, SO3Can be in 70 to 80 DEG C of temperature It is condensate under the conditions of degree on helix tube 2 and glass core 1.SO in flue gas2Directly can pass through from condenser, flue gas is from cold Condenser enters drying device after flowing out and dries, and dried flue gas enters flowmeter.After sampling terminates, chain of entirely being sampled It is cooled to less than 60 DEG C.Then, in 80% isopropanol bottle for handling liquid toilet or cosmetic substance, with 80% isopropanol washing lotion drip washing condenser, heating sampling Rifle and sampling flexible pipe, specifically can be with twice of drip washing, to obtain sample.
SO can be calculated by equation below according to the sample that above-mentioned sampling operation is obtained3Content：
Wherein, CSampleSulfate ion concentration test value (mg/L) for sample；VSample accommodatingFor sample constant volume volume (ml)； CBlankSulfate ion concentration test value (mg/L) for 80% isopropanol washing lotion；VGFor dry gas production volume (NL) of mark.
This kind of test system condenses SO by condenser3, then sampled through 80% isopropanol washing lotion, can be relatively accurately Test SO3Concentration.
Preferably, the temperature of heating sampling gun and sampling flexible pipe can control between 240 to 250 DEG C, to be specifically as follows 250℃.The temperature of heating sampling gun can affect sulfur trioxide test result, heat the temperature of sampling gun in 240 to 250 DEG C of models When enclosing interior, sulfur trioxide test value is more accurate.Wherein, the control of temperature can pass through heater, thermometer, temperature with monitoring Degree sensor etc. is realized.
In each embodiment above-mentioned, the gas production flow of test system may be controlled to 4ml/min, to ensure to SO3Fill Divide sampling.If gas production flow is too small, the SO in flue gas3In sampling chain, residence time is long, so as to cause a part of SO3 Before condenser is not entered, just adsorbed by the pipeline of upstream, cause sampling loss；If gas production flow is excessive, can lead again Cause the SO in flue gas3When being condensed into aerosol within the condenser, do not caught by condenser, directly escaped from condenser, Sampling loss can be caused.After tested, when gas production flow is 4mL/min, sulfur trioxide test concentrations reach peak value, therefore arrange Gas production flow is the accuracy that 4mL/min can ensure to measure.Wherein, gas production flow can be monitored by flowmeter.
In above-described embodiment, test system can also include filtering for being arranged on the flying dust of the outlet of heating sampling gun Device, for example, Guartz filter, fly-ash filter can to flue gas in flying dust filter.
It should be noted that when desulphurization system import and export is tested, only when flue-gas temperature is higher than flue gas acid dew point temperature More than 25 DEG C of degree, and could adopt when sulfuric acid droplets are not contained in flue gas fly-ash filter；When the low cloud of dust gas of measurement and cigarette When temperature degree is near or below flue gas acid dew point, sample without fly-ash filter and using isokinetic sampling's method, otherwise, H2SO4Can condense on the flying dust of filter, can so cause SO3Measured value low.
For maximum gas production, such as when out of stock system import and export is tested, the SO in high cloud of dust gas is measured3When, most Big gas production should be less than 75NL, to avoid SO3On the flying dust that absorption is enriched with the filter.
In each embodiment above-mentioned, test system can also include dividing for analyzing the chromatography of ions of sulfate ion concentration Analysis apparatus, chromatography of ions certainty of measurement are high, and specification simple to operate is dense using the sulfate ion in ion chromatography sample Degree, such that it is able to pass through to calculate the SO obtained in flue gas3Concentration.
Wherein, silica gel drying device can be set in drying device.
In this specification, each embodiment is described by the way of going forward one by one, and what each embodiment was stressed is and other The difference of embodiment, between each embodiment identical similar portion mutually referring to.
Enter for testing the test system of sulfur trioxide concentration and its condenser in flue gas to provided by the present invention above Go and be discussed in detail.Specific case used herein is set forth to the principle of the present invention and embodiment, above enforcement The explanation of example is only intended to help and understands the method for the present invention and its core concept.It should be pointed out that general for the art For logical technical staff, under the premise without departing from the principles of the invention, some improvement and modification can also be carried out to the present invention, this A little improvement and modification are also fallen in the protection domain of the claims in the present invention.

Claims (8)

1. a kind of condenser, it is characterised in that including housing (6), the helix tube (2) in the housing (6) and be located at institute The glass core (1) of the tail end of helix tube (2) is stated, and housing (6) are provided with and the logical of housing (6) are passed in and out for circulation fluid Hole (3).
2. condenser according to claim 1, it is characterised in that be additionally provided with thermocouple reserved opening on housing (6) (5).
3. a kind of test system for testing sulfur trioxide concentration in flue gas, it is characterised in that including 1 or 2 institute of claim The condenser that states.
4. test system according to claim 3, it is characterised in that also include：
For the heating sampling gun for extracting flue gas from flue out；
For connecting the sampling flexible pipe of the heating sampling gun and the condenser；
For the drying device that the flue gas to flowing out the condenser is dried；
For measuring the flowmeter of flue gas flow, outlet side of the flowmeter located at the drying device；
For cleaning 80% isopropanol bottle for handling liquid toilet or cosmetic substance of the condenser, the heating sampling gun and the sampling flexible pipe.
5. test system according to claim 4, it is characterised in that the heating sampling gun and the sampling flexible pipe plus Hot temperature range is 240 DEG C to 250 DEG C.
6. test system according to claim 5, it is characterised in that the gas production flow of the test system is 4ml/min.
7. test system according to claim 6, it is characterised in that also include for going out located at the heating sampling gun The fly-ash filter of mouth.
8. the test system according to claim 3 to 7 any one, it is characterised in that also include for analyzing sulfate radical The ion chromatography apparatus of ion concentration.
CN201610932806.3A 2016-10-31 2016-10-31 For testing the test system of sulfur trioxide concentration and its condenser in flue gas Pending CN106501443A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109000997A (en) * 2018-10-09 2018-12-14 中国科学院过程工程研究所 A kind of SO3The method of sampling and device of detection device
CN109975491A (en) * 2019-03-29 2019-07-05 山东大学 Sulfur trioxide/sulfuric acid method in a kind of isloation state detection flue gas
CN110044834A (en) * 2019-05-20 2019-07-23 华能国际电力股份有限公司 A kind of sulfur trioxide on-line monitoring system and method
CN110044835A (en) * 2019-05-20 2019-07-23 华能国际电力股份有限公司 Sulfur trioxide on-line analysis system and method
CN110346190A (en) * 2019-08-13 2019-10-18 上海明华电力科技有限公司 A kind of test device and method of fixed source smoke discharge soluble-salt
CN112945887A (en) * 2021-03-11 2021-06-11 西安交通大学 Flue gas in-situ monitoring system and method

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CN103472061A (en) * 2013-08-27 2013-12-25 浙江大学 Device and method for detecting sulfur trioxide in flue gas on line
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109000997A (en) * 2018-10-09 2018-12-14 中国科学院过程工程研究所 A kind of SO3The method of sampling and device of detection device
CN109975491A (en) * 2019-03-29 2019-07-05 山东大学 Sulfur trioxide/sulfuric acid method in a kind of isloation state detection flue gas
CN110044834A (en) * 2019-05-20 2019-07-23 华能国际电力股份有限公司 A kind of sulfur trioxide on-line monitoring system and method
CN110044835A (en) * 2019-05-20 2019-07-23 华能国际电力股份有限公司 Sulfur trioxide on-line analysis system and method
CN110044835B (en) * 2019-05-20 2022-06-14 华能国际电力股份有限公司 Sulfur trioxide online analysis system and method
CN110346190A (en) * 2019-08-13 2019-10-18 上海明华电力科技有限公司 A kind of test device and method of fixed source smoke discharge soluble-salt
CN110346190B (en) * 2019-08-13 2022-03-18 上海明华电力科技有限公司 Device and method for testing soluble salt discharged by fixed source flue gas
CN112945887A (en) * 2021-03-11 2021-06-11 西安交通大学 Flue gas in-situ monitoring system and method
CN112945887B (en) * 2021-03-11 2023-12-19 西安交通大学 Flue gas in-situ monitoring system and method

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Application publication date: 20170315