CN102879529A - Wet type sample gas analyzing system applicable to monitoring of combustion conditions of coal-fired kilns - Google Patents
Wet type sample gas analyzing system applicable to monitoring of combustion conditions of coal-fired kilns Download PDFInfo
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- CN102879529A CN102879529A CN2012103804176A CN201210380417A CN102879529A CN 102879529 A CN102879529 A CN 102879529A CN 2012103804176 A CN2012103804176 A CN 2012103804176A CN 201210380417 A CN201210380417 A CN 201210380417A CN 102879529 A CN102879529 A CN 102879529A
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Abstract
A wet type sample gas analyzing system applicable to monitoring of combustion conditions of coal-fired kilns comprises a sampling probe, a sample preprocessing cabinet, an analyzing cabinet and the like. A jet pump for gas pumping, a gas-water separator, a dehumidifier, a filter, a buffer tank and a water drainage tank are mounted in the sample preprocessing cabinet, a secondary filter, an electronic cooler, a secondary buffer tank, a sample gas switching valve, a standard gas cylinder, a paper filter, a flow meter and a gas analyzer are mounted in the analyzing cabinet, and the sample preprocessing cabinet and the analyzing cabinet are mounted in a field analysis meter cabin. The system is capable of effectively removing dust in the sample gas with clean water and continuously acquiring waste gas samples, analysis result curves are continuous without breakpoint. Umbrella-shaped dust removal water mist sprayed by the probe can completely wash sample gas entering the system to remove various harmful and corrosive substances irrelevant to component analysis of O2, NO and CO in waste gas generated by fuel coal, and the wet type sample gas analyzing system used with the field analysis meter cabin is convenient to use, long in service life, simple in structure, low in maintenance and low in cost.
Description
Technical field
The present invention relates to a kind of cement kiln sampling gas analysis device, particularly relate to a kind of Wet sampling gas analytic system that is applicable to the monitoring of coal-fired furnace combustion position.
Background technology
The exhaust gas constituents analysis that the kiln burning is discharged is one of Main Basis of furnace efficiency, energy resource consumption, disposal of pollutants evaluation.Kiln waste gas detects the high temperature with high dust rugged surroundings that face, the waste gas of the cement kiln take coal as fuel, and not only temperature is high, dust is many, and exhaust gas constituents is complicated.Accurately and reliably, on-line continuous detects and analyzes, and is the problem of instrument and meter industry research always.ABB AB, the Siemens Company of external Germany, the Sichuan instrument of domestic imported technology, Nanjing analysis meter, Beijing analysis meter, West Beijing gram step the companies such as Haake, snowfield dragon all on the kiln of cement industry directly transplanting promote the use of the gas analyzing apparatus of other industry.
Field practice through the more than ten years shows that the weak point of the gas analyzing apparatus of this directly transplanting is:
1, probe apparatus is complicated, cost is high: because the probe of this utilization, need constantly to purge probe and cross the filter core dedusting with pressurized air, also to pull out cleaning to probe once in 1 to 2 hour, need huge probe travel mechanism, console panel cabinet, scene will establish gas analyzing apparatus equipment mounting platform special-purpose about 5 square metres for this reason.
2, sample gas gathers discontinuous, inefficiency: the Sichuan instrument product of domestic imported technology: the probe cleaning was pulled out once in per 2 hours less than 7 to 10 minutes in general blowback interval; ABB AB's standard of Germany was the blowback cycle from 3 minutes, 15 minutes until 1.5 hours, was divided into 7 gears, the probe draw-out-time be 30 minutes, 2 hours 30 minutes until 15 hours, also be corresponding 7 grades; But the kiln tail smoke-box at cement industry also can only use deep low gear.Will once pop one's head in and cross filter core with the pressurized air blowback, each 3 to 7 minutes be pressurized air because blowback uses, so again sampling after the blowback, the pressurized air that blowback in the sampling conduit need to be used is only sample gas after discharging, and just returns to the time of analyzing sample gas.So the component content curve of analytical instrument output is the pulse type continuous curve.Analytical instrument and probe distance are larger, and pulse is sharper.But because the actual range of production scene can not be too little, generally about 30 meters/100ft, so pulse all is very sharp.Super only 1 to 2 minute of the width of field actual measurement results pulse tip that is to say, in each blowback, analytical cycle, detects and is no more than 2 minutes the effective time of analyzing data.And because very large through the cement clinker raw material granularity of dust difference of raw material grinding mill grinding, the effect of blowback will be worse and worse.
3, the analysis data that provide of the gas analyzing apparatus of this directly transplanting are not the analysis results of analytical instrument output, but use computer technology with the tip of pulse type curve, namely detect the live part of analyzing data, use computing machine to connect by force, be interrupted output display with digital quantity.Super only 1 to 2 minute of the width of field actual measurement results pulse tip, by 7 minutes cycles, actual analysis was calculated in 2 minutes, per hour analyze 8.6 times, each 2 minutes, can only analyze 17 minutes flue gases in one hour, can only analyze 408 minutes in one day, 6.8 hours flue gas.If adopt 3 minutes cycles, effect will be worse.Because it is too short to detect the effective time of analyzing data, so authenticity and the representativeness of the analysis data of output are too poor.
4, the NO content in the waste gas of cement kiln discharge can directly react the temperature of rotary cement kiln clinkersintering process, and this point is causing cement industry personnel's attention, and brings into use NO component content value to judge the height of burning zone temperature.But the gas analyzing apparatus of this directly transplanting is in the gatherer process of sample gas, and the sample gas that gathers need to flow for tens seconds in through the pipeline of cooling, makes part NO in the sample gas and the part O in the sample gas
2Produce chemical reaction, generate NO
2, that is: 2NO+ O
2=2NO
2Like this, the NO numerical value of the gas analyzing apparatus of this directly transplanting output is just low more than 30%, and is at random.And probe is longer, pipeline is longer, and NO numerical value is just low.Must use NO
2/ NO gas converter is changed, and just can make the NO numerical value of the gas analyzing apparatus output of this directly transplanting reach actual value.NO
2The high temperature of/NO gas converter and catalyzer, the directly life-span of impact analysis instrument.Because China region is wide, the formation condition of bunker coal is complicated, and coal is various, so sample gas incidental impurities is many.If used the washing of acid mist filter or hydrogen peroxide, the NO that just reaction is generated
2Also removed, the NO numerical value of output just can only be to have broken away from the nonsensical data of right value far away.If do not used the washing of acid mist filter or hydrogen peroxide, pipeline, parts, analytical instrument that sample gas will etching system shorten serviceable life of the gas analyzing apparatus of this directly transplanting.
Summary of the invention
Goal of the invention of the present invention is the many defectives for the gas analyzing apparatus technology of existing directly transplanting; a kind of long service life is provided; simple for structure; easy to use, maintenance is few, expense is low, can effectively reduce coal consumption and discharge less; reduce cost; increase the benefit, protection of the environment, the Wet sampling gas analytic system that is applicable to coal-fired furnace combustion position monitoring.
Realize above-mentioned purpose by the following technical solutions:
A kind of Wet sampling gas analytic system that is applicable to the monitoring of coal-fired furnace combustion position, mainly by the sampling probe of the water spray dedusting of the front end that is arranged on system, be arranged on the analysis meter cabin at system rear portion, sampling pre-service cabinet, analysis cabinet are loaded on respectively in the instrument cabin, the below that connector is positioned at sampling probe is connected with sampling probe, and its structural feature is:
The described sampling probe of a is comprised of outer tube, isolated tube, sampling pipe and washing pipe; Washing pipe, sampling pipe, isolated tube, outer tube are contained in the probe successively according to order from inside to outside, and described sampling probe is connected with connector, connector with the cooling water inlet pipe, cool back water pipe and be connected, sampling probe is connected with instrument cabin;
Be equipped with in the described sampling pre-service of the b cabinet and bleed with ejector, moisture trap, moisture separator, filtrator, surge tank, draining water tank, bleed and be connected with pipeline with moisture trap with ejector, moisture trap is connected with pipeline with moisture separator, filtrator, moisture separator, filtrator are connected with surge tank respectively, bleed with ejector with get tracheae and be communicated with;
In the described analysis cabinet of c NO, CO, O are housed
2Analyser, aflter-fillter, electronic cooler, secondary buffer tank, solenoid valve, calibrating gas bottle, paper filter, aflter-fillter, electronic cooler are connected with the secondary buffer tank respectively, electronic cooler links to each other with solenoid valve, solenoid valve links to each other with paper filter, paper filter is connected with flowmeter, flowmeter and NO, CO, O
2Analyser links to each other, NO, CO, O
2Analyser with analyze cabinet and link to each other, aflter-fillter, electronic cooler link to each other with secondary buffer tank in the pre-service cabinet.
As preferred version, described washing pipe front end is equipped with dust removal showerhead, and this dust removal showerhead front end face, side have the hole, apart from shower nozzle front end face perforate 3.5 mm places, is provided with baffle plate.
As preferred version, the dust removal showerhead front end face has 5 holes, and the side has 2 holes.
As preferred version, the washing water inlet of described washing pipe is positioned at the tail end of sampling probe, and this washing water inlet is communicated with the washings pipeline, is connected with flow switch on the washings pipeline.
As preferred version, described cooling inlet pipeline is connected with feed pipe.
As preferred version, described cooling backwater pipeline is communicated with thermometer, draining water tank.
As preferred version, the outer wall of described sampling pipe, the inwall of outer tube, isolated tube have formed the cooling jacket that can circulate jointly.
As preferred version, probe diameter 2 inch that described sample gas analytic system is used, length 2m.
As preferred version, described Wet sampling gas analytic system is running hours in 1000 ℃～1500 ℃ environment at kiln temperature, and cooling water pressure is that 0.6Mpa, flow are 60 to 80L/min, outlet water temperature＜50 ℃.
As preferred version, when described sampling probe was lower than 15 ℃ in environment temperature, its water supply line, sampling conduit were incubated with companion's hot line.
Adopt technique scheme, compared with prior art, the present invention has realized the use clear water, can effectively remove dust in the sample gas, work long hours and in 1000 ℃ to 1500 ℃ environment of kiln, take continuously the waste gas sample, one week purged cleaning once, just can take continuously sample air, the analysis result curve is continuous, does not have breakpoint; The dedusting water smoke of probe ejection fully washs the sample gas of access to plant simultaneously, removes various and O in the coal-fired waste gas that produces
2, irrelevant objectionable impurities, the corrosive substance of NO, CO constituent analysis, the serviceable life of effectively having improved the analytical equipment parts.Because NO, CO, O
2Water insoluble, enter the sample gas of probe, owing to water flow, the existence of water is arranged, affected NO and O
2Reaction conditions keeps NO content constant; Simultaneously, about 5% the NO that contains in the sample gas
2After water-soluble, also discharge part NO.So the total error of analyser analysis result is approximately less than 3%.At O
2＜10%, under the anoxia condition, 3NO
2+ H
2O=2HNO
3+ NO ↑.The analysis data are accurate, and the kiln production operation is effectively instructed in various variations in the energy real-time response cement clinker production run.
The field experiment data show, be equipped with on-the site analysis instrument cabin after, but serviceable life more than ten 5 years.The present invention is simple for structure, and is easy to use, and maintenance is few, expense is low.Its use can reduce coal consumption effectively discharges less, reduces cost, increases the benefit protection of the environment.
Description of drawings
Fig. 1 is one-piece construction synoptic diagram of the present invention.
Fig. 2 is the structure for amplifying synoptic diagram of sampling probe of the present invention.
Among the figure, baffle plate 1, hole for water spraying 2, washing pipe 5, sampling pipe 6, isolated tube 7, outer tube 8, thermometer 9, ejector 10, moisture trap 11, moisture separator 12, filtrator 13, surge tank 14, draining water tank 15, aflter-fillter 16, electronic cooler 17, solenoid valve 18, paper filter 19, flowmeter 20, analyser 21, analyze cabinet 22, pre-service cabinet 23, analysis meter cabin 24, sampling probe 25, calibrating gas bottle 26, secondary buffer tank 27, shower nozzle 28, water supply valve 29, washings water supply flow switch 30, washings by-pass valve control 31, cooling water inlet pipe 32, cool back water pipe 33, get air pipe 34, washing water inlet 35.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples.
Present embodiment is a kind of Wet sampling gas analytic system that is applicable to the monitoring of coal-fired furnace combustion position, and this system is comprised of sampling probe 25, analysis cabinet 22, pre-service cabinet 23 etc.
Concrete structure is seen Fig. 1, Fig. 2, and the sampling probe 25 that the water spray dedusting is used is comprised of outer tube 8, isolated tube 7, sampling pipe 6 and washing pipe 5, is arranged on the front end of system.Washing pipe 5, sampling pipe 6, isolated tube 7, outer tube 8 are contained in the sampling probe 25 successively according to the order of washing pipe 5, sampling pipe 6, isolated tube 7, outer tube 8 from inside to outside.Washing pipe 5 front ends are equipped with dust removal showerhead 28, and front end face, the side of dust removal showerhead 28 have the hole, and front end face has 5 holes, and the side has 2 holes, apart from dust removal showerhead 28 front end face perforates 3.5 mm places, are provided with baffle plate 1, and baffle plate 1 is installed in shower nozzle 28 front ends.The washing water inlet 35 of washing pipe 5 is positioned at the tail end of sampling probe 25, and this washing water inlet 35 is communicated with the washings pipeline, is connected with washings water supply flow switch 30 on the washings pipeline.The inwall of the outer wall of sampling pipe 6, outer tube 8, isolated tube 7 have formed the cooling jacket that can circulate jointly.
The below of sampling probe 25 connects connector, connector is connected with cooling inlet pipeline 32, cooling backwater pipeline 33, cooling inlet pipeline 32 is connected with feed pipe with water supply valve 29 by connector and links to each other, cooling backwater pipeline 33 and thermometer 9, be communicated with draining water tank 15, draining water tank 15 is contained in the sampling pre-service cabinet 23.
Sampling probe 25 is connected with instrument cabin 24, and instrument cabin 24 is arranged on the system rear portion.
Sampling pre-service cabinet 23, analysis cabinet 22 are loaded in the analysis meter cabin 24, being equipped with in the sampling pre-service cabinet 23 and bleeding with ejector 10, moisture trap 11, moisture separator 12, filtrator 13, surge tank 14, draining water tank 15.Bleed and be connected with moisture trap 11 usefulness pipelines with ejector 10, moisture trap 11 is connected with moisture separator 12, filtrator 13 usefulness pipelines, moisture separator 12, filtrator 13 are connected with surge tank 14 respectively, bleed with ejector 10 with get air pipe 34 and be communicated with, the sampling pipe 6 of getting air pipe 34 and probe links to each other.
Analyze in the cabinet 22 analyser 21, aflter-fillter 16, electronic cooler 17, secondary buffer tank 27, solenoid valve 18, calibrating gas bottle 26, paper filter 19 are housed, aflter-fillter 16, electronic cooler 17 are connected with secondary buffer tank 27 respectively, electronic cooler 17 links to each other with solenoid valve 18, solenoid valve 18 links to each other with paper filter 19, paper filter 19 is connected with flowmeter 20, flowmeter 20 and NO, CO, O
2Analyser 21 links to each other NO, CO, O
2Analyser 21 be connected cabinet 22 and connect.Filtrator 13 in aflter-fillter 16 and the pre-service cabinet 23 links to each other.
Probe diameter 2 inch that the present invention uses, length 2m.
The present invention is running hours in 1000 ℃～1500 ℃ environment at kiln temperature, and cooling water pressure is that 0.6Mpa, flow are 60 to 80L/min, outlet water temperature＜50 ℃.When environment temperature was lower than 15 ℃, the water supply line of sampling probe 25, sampling conduit were incubated with companion's hot line.
Sampling probe 25 of the present invention is selected Tangshan Aote Electromechanical Equipment Co., Ltd's product
Ejector 10 of the present invention select Tangshan Aote Electromechanical Equipment Co., Ltd's product (
Moisture trap 11 of the present invention is selected Japanese Henghe company product.
Moisture separator 12 of the present invention is selected Tangshan Aote Electromechanical Equipment Co., Ltd's product, and filtrator 13 is selected SMC company product, and surge tank 14 is selected Tangshan Aote Electromechanical Equipment Co., Ltd's product, and draining water tank 15 is 500*400*400mm.
Aflter-fillter 16 of the present invention is selected Tangshan Aote Electromechanical Equipment Co., Ltd's product, electronic cooler 17 is selected the product of Tangshan Aote Electromechanical Equipment Co., Ltd's customization, paper filter 19 is selected Tangshan Aote Electromechanical Equipment Co., Ltd's product, flowmeter 20 is selected Changzhou dicyclo product, analyser 21 is selected German ABB AB product, and secondary buffer tank 27 is selected Tangshan Aote Electromechanical Equipment Co., Ltd's product.
Other parts of the present invention are commercially available.
The course of work of the present invention
During device startup work, shower nozzle 28 stretches out probe end face 4,3.5～4mm, and fixing.Washings flow 5～6L/min.Sampling probe 25 insertion process pipelines 120～150mm.
Chilled water is flowed through by water supply valve 29 and is cooled off inlet pipeline 32, enter the cooling jacket that the outer wall by outer tube 8 inwalls, isolated tube 7 and sampling pipe 6 of sampling probe 25 forms, by cooling water outlet pipe road 33 thermometer 9 of flowing through, entering draining water tank 15 discharges, regulate water supply valve 29, make thermometer 9 indications less than 50 ℃.
Washings enter washing pipe 5 by water supply flow switch 30, washings by-pass valve control 31, flow to shower nozzle 28, by hole 2 and hole 3 ejections, washings by hole 2 ejections are sprayed onto baffle plate 1, be the probe end face 4 that umbrella is mapped to sampling probe 25, cover the air admission hole of sampling pipe 6, sample gas is realized washing and dedusting.
Sample gas is under the extraction of ejector 10, through the washings washing, enter sampling pipe 6 after the dedusting, through getting air pipe 34, ejector 10, enter moisture trap 11, further dedusting and water, gas separates, isolated sample gas enters moisture separator 12, enter filtrator 13 after removing moisture, again dedusting, after enter the aflter-fillter 16 of analyzing cabinet 22, again dedusting, after enter electronic cooler 17, cooling enters solenoid valve 18 after removing moisture, flows to paper filter 19 through solenoid valve 18, after paper filter 19 last dedustings, flow to flowmeter 20, flow to NO through flowmeter 20, CO, O
2Analyser 21, the waste gas after the analysis flow out analyzes cabinet 22.Analysis result is by NO, CO, O
2Analyser 21 becomes DC4 ~ 20mA output, directly gives central control room, shows to the operator.
The current that aflter-fillter 16 and electronic cooler 17 are discharged are discharged through secondary buffer tank 27.
Need verification NO, CO, O
2During analyser 21, solenoid valve 18 is connected calibrating gas bottle 26, and Standard Gases flows to NO, CO, O through flowmeter 20
2Analyser 21 carries out zero point and range check.Verification finishes, and automatically gets back to analysis state.
Claims (10)
1. one kind is applicable to the Wet sampling gas analytic system that the coal-fired furnace combustion position is monitored, mainly by the sampling probe of the water spray dedusting of the front end that is arranged on system, be arranged on the analysis meter cabin at system rear portion, sampling pre-service cabinet, analysis cabinet are loaded on respectively in the analysis meter cabin, the below that connector is positioned at sampling probe is connected with sampling probe, it is characterized in that
The described sampling probe of a is comprised of outer tube, isolated tube, sampling pipe and washing pipe; Washing pipe, sampling pipe, isolated tube, outer tube are contained in the probe successively according to order from inside to outside, and described sampling probe is connected with connector, connector with the cooling water inlet pipe, cool back water pipe and be connected, sampling probe is connected with the analysis meter cabin;
Be equipped with in the described sampling pre-service of the b cabinet and bleed with ejector, moisture trap, moisture separator, filtrator, surge tank, draining water tank, bleed and be connected with pipeline with moisture trap with ejector, moisture trap is connected with pipeline with moisture separator, filtrator, moisture separator, filtrator are connected with surge tank respectively, bleed to be communicated with the air pipe of getting of probe with ejector;
In the described analysis cabinet of c NO, CO, O are housed
2Analyser, aflter-fillter, electronic cooler, secondary buffer tank, solenoid valve, calibrating gas bottle, paper filter, aflter-fillter, electronic cooler are connected with the secondary buffer tank respectively, electronic cooler links to each other with solenoid valve, solenoid valve links to each other with paper filter, paper filter is connected with flowmeter, flowmeter and NO, CO, O
2Analyser links to each other, NO, CO, O
2Analyser with analyze cabinet and link to each other, aflter-fillter links to each other with filtrator in the pre-service cabinet.
2. the Wet sampling gas analytic system that is applicable to coal-fired furnace combustion position monitoring according to claim 1, it is characterized in that, described washing pipe front end is equipped with dust removal showerhead, this dust removal showerhead front end face, side have the hole, apart from shower nozzle front end face perforate 3.5 mm places, be provided with baffle plate.
3. the Wet sampling gas analytic system that is applicable to the monitoring of coal-fired furnace combustion position according to claim 2 is characterized in that the dust removal showerhead front end face has 5 holes, and the side has 2 holes.
4. the Wet sampling gas analytic system that is applicable to coal-fired furnace combustion position monitoring according to claim 1, it is characterized in that, the washing water inlet of described washing pipe is positioned at the tail end of sampling probe, this washing water inlet is communicated with the washings pipeline, is connected with flow switch on the washings pipeline.
5. the Wet sampling gas analytic system that is applicable to the monitoring of coal-fired furnace combustion position according to claim 1 is characterized in that described cooling inlet pipeline is connected with feed pipe.
6. the Wet sampling gas analytic system that is applicable to the monitoring of coal-fired furnace combustion position according to claim 1 is characterized in that described cooling backwater pipeline is communicated with thermometer, draining water tank.
7. the Wet sampling gas analytic system that is applicable to the monitoring of coal-fired furnace combustion position according to claim 1 is characterized in that the outer wall of described sampling pipe, the inwall of outer tube, isolated tube have formed the cooling jacket that can circulate jointly.
8. the Wet sampling gas analytic system that is applicable to the monitoring of coal-fired furnace combustion position according to claim 1 is characterized in that, probe diameter 2 inch that described sample gas analytic system is used, length 2m.
9. the Wet sampling gas analytic system that is applicable to coal-fired furnace combustion position monitoring according to claim 1, it is characterized in that, described Wet sampling gas analytic system is running hours in 1000 ℃～1500 ℃ environment at kiln temperature, and cooling water pressure is that 0.6Mpa, flow are 60 to 80L/min, outlet water temperature＜50 ℃.
10. the Wet sampling gas analytic system that is applicable to the monitoring of coal-fired furnace combustion position according to claim 1 is characterized in that, when described sampling probe was lower than 15 ℃ in environment temperature, its water supply line, sampling pipe were incubated with companion's hot line.
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|---|---|---|---|
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678068A (en) * | 2015-03-20 | 2015-06-03 | 中冶赛迪工程技术股份有限公司 | Dry type detection device for acid concentration of blast furnace coal gas as well as sampling device and detection method thereof |
| CN104888988A (en) * | 2015-06-03 | 2015-09-09 | 新气象（唐山）合同能源管理有限公司 | Novel nozzle of sampling probe |
| CN107462079A (en) * | 2017-09-22 | 2017-12-12 | 高建明 | High-temperature gas analyzer for cement kiln environment monitoring |
| CN109959546A (en) * | 2018-12-20 | 2019-07-02 | 江苏道明化学有限公司 | A kind of improved method of magnetic mechanical oxygen analyzer sample processing system |
| CN110346442A (en) * | 2019-08-06 | 2019-10-18 | 徐磊 | A kind of monitoring device for pulverized-coal fired boiler working environment |
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| CN104678068A (en) * | 2015-03-20 | 2015-06-03 | 中冶赛迪工程技术股份有限公司 | Dry type detection device for acid concentration of blast furnace coal gas as well as sampling device and detection method thereof |
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| CN110346442A (en) * | 2019-08-06 | 2019-10-18 | 徐磊 | A kind of monitoring device for pulverized-coal fired boiler working environment |
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Application publication date: 20130116 |