CN103225006B - Continuous analysis system of blast-furnace integrated gas - Google Patents
Continuous analysis system of blast-furnace integrated gas Download PDFInfo
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Abstract
The invention discloses a continuous analysis system of blast-furnace integrated gas, belonging to the technical field of continuous analysis of blast furnace gas. According to the invention, a top of a gas pretreatment apparatus is connected with an inlet of a secondary purifying apparatus, an outlet of the secondary purifying apparatus is connected to a gas chromatograph, and a data processing unit is connected with the gas chromatograph. The gas pretreatment apparatus comprises a cylinder, a cylinder cap, a sample gas inlet, a sample gas outlet, a heat-insulation layer and a dehydrating and dedusting assembly, wherein a bottom of the cylinder cap is provided with the sample gas inlet, a top of the cylinder is provided with the sample gas outlet, inside of the cylinder is provided with the heat-insulation layer, inside of the heat-insulation layer is provided with the dehydrating and dedusting assembly, and the dehydrating and dedusting assembly comprises a fixed sleeve, a first clamp arm, a second heat conduction clamp arm, a sample gas pipeline, a filter core replacing port, a refrigerating sheet, a cooling water pipe, a heat transfer sheet and an electric control unit. The sample gas treated by the gas pretreatment apparatus can reach requirements of normal working of the gas chromatograph. The system plays an important role on long-term and stabile operation of the blast furnace, and improvement of utilization efficiency of the gas.
Description
Technical field
The present invention relates to blast furnace coal gas Continuous Analytical Technique field, more particularly, relate to a kind of blast furnace coal gas continuous analysis system.
Background technology
In blast furnace operating, detecting stock gas composition is a very important job.Accurately CO, the CO in continuous automatic inspection top gas
2, H
2content, to judging conditions of blast furnace and equipment work situation, completes blast furnace efficient operation extremely important.The difficult point of the comprehensive coal gas continuous analysis system of furnace roof is the sampling purifying treatment of sample gas.Tradition blast furnace gas analysis system sampling unit is arranged on after gravitational precipitator, and sample gas disposal generally need to be through two stages: filter and dehydration.The coal gas of sampling enters dust removal filter under the effect of off-gas pump, through multistage dedusting, removes most of dust, then passes through air water separator (or moisture eliminator) and remove most of moisture, enters analytical instrument finally by crossing fine filter.In addition, because amount of dust after dedusting is large, need to increase timing N
2back-blowing device ensure pipeline unimpeded (thank to Yongping. blast furnace integrated gas analysis system. analytical instrument, 1998, No.3:28 ~ 30; With stock gas composition analysis control blast furnace operating. metallurgical collected translation .1995, No.1:6 ~ 7), in prior art, in conventional blast furnace coal gas continuous analysis system, its sample gas pretreating system all needs timing N
2blowback, unimpeded to ensure the pipeline of sample gas pretreating system, make like this work of continous-stable for a long time of sample gas pretreating system, this is the great difficult problem that always perplexs iron and steel enterprise's continuous detecting top gas.At present, good few of top gas continuous on-line analysis system running effect both at home and abroad, its major cause is that sample gas pretreating system is too complicated, maintenance is large, investment cost high (abroad, pretreatment system is close with gas analysis meter price), and install, debug, safeguard all more complicated, also higher to the requirement of maintenance personnel's state of the art, make troubles to use.
About the exploitation of top gas continuous analysis system, existing relevant technical literature is open, as: Wang Ping, Li Jiaxin, the comprehensive coal gas continuous analysis system of blast furnace roof of people's research and development such as Zhou Liying can provide online analysis of blast furnace gas ingredient analysis continuously for blast furnace watchroom, obtain good effect (Wang Ping, Li Jiaxin, Zhou Liying etc. exploitation and the application of the comprehensive coal gas continuous analysis system of blast furnace roof. iron and steel, 2004, No.6:6 ~ 9), the difficult point that this paper middle finger goes out stock gas continuous analysis system exploitation is the purifying treatment of sample gas, make a concrete analysis of as follows:
(1) wet method stock gas dust-removal system sample gas purifying treatment difficult point: (useful volume is 2545 m to No. 1 blast furnace of Ma Gangxin
3) cleaning coal gas adopts is wet type series connection venturi system.Gravitational precipitator outlet dust content of gas is 2.32 ~ 3.28 g/m
3, moisture content in gas is 5%, 100 ~ 300 DEG C of temperature; Secondary venturi outlet dustiness is 2 ~ 4 mg/m
3, outlet moisture content in gas is 6 ~ 10 g/m
3(wherein containing mechanical water), temperature be 30 ~ 60 DEG C (Gong Yishu, Ding Baozhong, Ling Shaoye etc. horse steel 2500 m
3the test of On Bf Gas Purifying System and research. ironmaking, 1996,15 (2): 26 ~ 28).Because each position its dust-laden of sample gas, temperature and water content are different, also can not be the same with purifying method therefore it is processed.In gravitational precipitator outlet sampling, the easy dewfall of sampling line is stopped up, therefore will be incubated sample gas, will carry out blowback sweep sampling line, sample gas load of dust remove weight.In the sampling of secondary venturi outlet, main task is will be except the moisture of sample gas, is secondly the dust-laden except sample gas.
(2) maintenance workload: many sampling units and analytical instrument can use finely in laboratory and analysis precision higher, but have more than is neededly at the scene how long just can not run well, analytical error is larger.Studying carefully its major cause is that system maintenance work amount is large, requires high and system core device (as electronic, operated pneumatic valve, filter core) life-span short etc. to maintenance personnel's expertise.
(3) adaptability to the abnormal working of a furnace: when the working of a furnace is undesired, throat temperature is high, and furnace roof is fetched water many, moisture content in gas increases.Therefore the collection of sample gas and refining plant want to deal with the abnormal conditions such as gas pressure, temperature and water content fluctuation are large.
But, the framework of only having introduced gas composition analytical system in the technical literature of the disclosure forms, for this key structure design of sample gas pretreatment unit, the disclosure document is only briefly write clear principle of work, and unexposed concrete structure design, the staff of field of metallurgy cannot reproduce this gas composition analytical system according to the introduction of the document, and the contriver of this patent is on the basis of this research paper, through test of long duration and analysis, after improvement, redesign out technical scheme of the present invention.
In addition, by patent retrieval, open about the existing related art scheme of preconditioning technique of sample gas analytical test.As, Chinese Patent Application No. 201110217370.7, the applying date: on July 21st, 2011, invention and created name is: a kind of device for smoke filtration, dehumidifying, mixing, this application case comprises flue gas inlet tube, flue gas fairlead, hybrid chamber, it is cylindric that single unit system is, device is divided into top and is divided into dehumidifying chamber, bottom is divided into hybrid chamber, the dividing plate that catchments is set between the two, in described hybrid chamber, fill respectively flue gas inlet tube and flue gas fairlead and lead to outside through dehumidifying chamber, the bottom of described flue gas fairlead is connected with filtering chamber, and the bottom of hybrid chamber has ash-removing mouth.Another: China Patent No. ZL201010548826.3, denomination of invention is: flue gas sampling dewatering unit.Above-mentioned technical scheme has been carried out pre-treatment to flue gas to a certain extent, but its structure design is unreasonable, generally all needs to adopt N
2back-blowing device is to ensure that pipeline is unimpeded, and maintenance cost is large, is inconvenient to use.
Summary of the invention
the technical problem that invention will solve
The object of the invention is to overcome comparatively complexity of top gas continuous on-line analysis system in prior art, its coal gas pretreatment unit need to increase timing N
2back-blowing device ensures that pipeline is unimpeded, and expensive deficiency, a kind of blast furnace coal gas continuous analysis system is provided, adopt technical scheme of the present invention, the performance of pretreatment unit is good, price is low, the life-span is long, maintenance is simple, meet gas chromatograph to sample gas specification of quality, and coal gas pretreatment unit is without carrying out timing N
2blowback operation.
technical scheme
For achieving the above object, technical scheme provided by the invention is:
A kind of blast furnace coal gas continuous analysis system of the present invention, comprise coal gas pretreatment unit, secondary-cleaned device, gas chromatograph and data processing unit, described coal gas pretreatment unit bottom is connected with sample gas stopple coupon, the depth of penetration of this sample gas stopple coupon is 1/2 ~ 1/3 of gas line caliber, the cut of sample gas stopple coupon and Gas Flow opposite direction, described coal gas pretreatment unit top is connected with the entrance of secondary-cleaned device, the outlet of this secondary-cleaned device is connected to gas chromatograph, described data processing unit is connected with gas chromatograph, wherein:
Described coal gas pretreatment unit, comprise cylinder, cap, the import of sample gas, the outlet of sample gas, thermal insulation layer and dehydration dedusting assembly, described cylinder is hollow structure and vertically arranges, the bottom of this cylinder is fixed with the cap of conical structure, described cap bottom is provided with the import of sample gas, and described cylinder top is provided with the outlet of sample gas, in described cylinder, be provided with thermal insulation layer, this thermal insulation layer inside is provided with dehydration dedusting assembly, described dehydration dedusting assembly comprises fixed muffle, the first jig arm, the second heat conduction jig arm, sample feed channel, filter element replacing mouth, refrigerating sheet, water-cooled tube, heat transfer sheet and ECU, wherein: described column body is vertically provided with sample feed channel, described sample feed channel bottom is through fixed muffle, this sample feed channel lower end is connected with the import of sample gas, sample feed channel upper end is provided with filter element replacing mouth, this upper end is connected with the outlet of sample gas, and be provided with filter core in this sample feed channel, one side of described sample feed channel is provided with the first jig arm, opposite side is provided with the second heat conduction jig arm, the first above-mentioned jig arm and the second heat conduction jig arm are wrapped in the periphery edge of sample feed channel jointly, the second described heat conduction jig arm contacts with the cold junction of refrigerating sheet, the hot junction of described refrigerating sheet contacts with a side of heat transfer sheet, the opposite side of heat transfer sheet is provided with water-cooled tube, and above-mentioned refrigerating sheet is connected with ECU, and this ECU is used for controlling refrigerating sheet work.
Further, described secondary-cleaned device is the weldless steel tube that two ends are provided with end cap, and steel wire cleaning ball is equipped with in this weldless steel tube inside.
Further, the filter core in described sample feed channel is steel wire cleaning ball.
Further, the material of the second described heat conduction jig arm and heat transfer sheet is copper material.
Further, the material of described fixed muffle and the first jig arm is nylon material.
beneficial effect
Adopt technical scheme provided by the invention, compared with existing known technology, there is following unusual effect:
(1) a kind of blast furnace coal gas continuous analysis system of the present invention, its dedusting adopts filter element filtering mode, and filter core is positioned at sample feed channel, Gas Flow is through sample feed channel, and dust is by filter element filtering, the refrigeration of refrigerating sheet energising simultaneously, the temperature of water in coal gas is reduced, thereby condensation dehydration, has realized sample gas filtration and dewatering integrated, makes dust content by 4mg/m
3drop to 0.5mg/m
3, moisture content is by 8g/m
3drop to 0.5g/m
3one of innovative point of key of the present invention is: when pending coal gas passes through sample feed channel, dust is attached on filter core, the water of the condensation of refrigeration dehydration simultaneously is also attached on filter core, make to filter down dust along with the water of refrigeration together flows to the bottom of sample feed channel, finally turn back in gas line, this process is also by chance the cleaning process to filter core, so in the present invention, filtration and dewatering integrated coal gas pretreatment unit have self-cleaning function, without carrying out timing N
2blowback operation, can realize serial sampling and purify, and simple in structure, easy for installation, as long as do not cut off the water supply, not power-off just can non-stop run, and need not manual intervention and maintenance;
(2) a kind of blast furnace coal gas continuous analysis system of the present invention, filter core in its sample feed channel is steel wire cleaning ball, this steel wire cleaning ball cost is low, only need to change once for about eight months, expensive (external with other, coal gas pretreatment unit general several ten thousand is to hundreds thousand of units), bulky, baroque stock gas analyzes continuously pretreatment unit and compares, coal gas pretreatment unit cost of the present invention only needs 3000 ~ 5000 yuan, and performance is good, it is all very convenient to install and use, safeguard, system one-time investment is low;
(3) a kind of blast furnace coal gas continuous analysis system of the present invention, it adopts sampling and purifies integrated sample gas pretreatment unit, can serial sampling purify, after processing, sample gas reaches the requirement of the normal work of gas chromatograph, coal gas continuous analysis system of the present invention to blast furnace direct motion steady in a long-term, improve coal gas utilising efficiency, reduce coke ratio and there is vital role, having significant economic benefit, is the monitoring tool that blast furnace section chief is indispensable.
Brief description of the drawings
Fig. 1 is the structural representation of coal gas pretreatment unit in the present invention;
Fig. 2 is the sectional view of coal gas pretreatment unit in Fig. 1;
Fig. 3 is the formation schematic diagram of a kind of blast furnace coal gas continuous analysis system of the present invention.
Label declaration in schematic diagram:
1, sample gas import; 2, fixed muffle; 3, the first jig arm; 4, thermal insulation layer; 5, sample feed channel; 6, sample gas outlet; 7, filter element replacing mouth; 8, the second heat conduction jig arm; 9, refrigerating sheet; 10, water-cooled tube; 11, cylinder; 12, heat transfer sheet, 13, cap; 14, gas line; 15, ECU; 16, secondary-cleaned device; 17, gas chromatograph; 18, data processing unit.
Embodiment
For further understanding content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments.
embodiment 1
In conjunction with Fig. 3, a kind of blast furnace coal gas of the present embodiment continuous analysis system, comprise coal gas pretreatment unit (in figure not label), secondary-cleaned device 16, gas chromatograph 17 and data processing unit 18, described coal gas pretreatment unit bottom is connected with sample gas stopple coupon, for obtaining representational coal gas sample, the depth of penetration of this sample gas stopple coupon is that 1/2 ~ 1/3 of gas line 14 calibers all can, the weldless steel tube that sample gas stopple coupon in the present embodiment is 50mm by five diameters forms side by side, the cut of sample gas stopple coupon and Gas Flow opposite direction (as shown in Figure 3), described coal gas pretreatment unit top is connected with the entrance of secondary-cleaned device 16, the outlet of this secondary-cleaned device 16 is connected to gas chromatograph 17, described data processing unit 18 is connected with gas chromatograph 17.Secondary-cleaned device 16 in the present embodiment is provided with the weldless steel tube of end cap for two ends, steel wire cleaning ball is equipped with in this weldless steel tube inside, the secondary-cleaned device 16 that steel wire cleaning ball is prepared from as filter core has good secondary-cleaned effect, can be further the dedusting of sample gas.
As depicted in figs. 1 and 2, coal gas pretreatment unit in the present embodiment, comprise cylinder 11, cap 13, sample gas import 1, sample gas outlet 6, thermal insulation layer 4 and dehydration dedusting assembly, described cylinder 11 is hollow structure and vertically arranges, the bottom of this cylinder 11 is fixed with the cap 13 of conical structure, described cap 13 bottoms are provided with sample gas import 1, this sample gas import 1 is for connecting sample gas stopple coupon, described cylinder 11 tops are provided with sample gas outlet 6, enter the further dedusting of secondary-cleaned device 16 from this sample gas outlet 6 sample gas out.
In the present embodiment, in the cylinder 11 of hollow structure, be provided with thermal insulation layer 4, these thermal insulation layer 4 inside are provided with dehydration dedusting assembly, this dehydration dedusting assembly comprises fixed muffle 2, the first jig arm 3, the second heat conduction jig arm 8, sample feed channel 5, filter element replacing mouth 7, refrigerating sheet 9, water-cooled tube 10, heat transfer sheet 12 and ECU 15, wherein: cylinder 11 inside are vertically provided with sample feed channel 5, described sample feed channel 5 bottoms are through fixed muffle 2, the material of fixed muffle 2 is nylon material, this fixed muffle 2 play fixed supporting role to sample feed channel 5, sample feed channel 5 lower ends are connected with sample gas import 1, sample feed channel 5 upper ends are provided with filter element replacing mouth 7, and the upper end of sample feed channel 5 is connected with sample gas outlet 6, in this sample feed channel 5, be provided with filter core, filter core in the present embodiment adopts steel wire cleaning ball, when i.e. concrete enforcement, multiple steel wire cleaning balls are filled in to 5 of sample feed channel from filter element replacing mouth 7 and form filter core.One side of the sample feed channel 5 in the present embodiment is provided with the first jig arm 3, opposite side is provided with the second heat conduction jig arm 8(as shown in Figure 2), the first above-mentioned jig arm 3 and the second heat conduction jig arm 8 are wrapped in the periphery edge of sample feed channel 5 jointly, what deserves to be explained is: the first jig arm 3 in the present embodiment and the second heat conduction jig arm 8 are wrapped up respectively the half on sample feed channel 5 periphery edges, and the material of the second heat conduction jig arm 8 is copper material, the material of the first jig arm 3 is nylon material, experimental results show that this structure is conducive to improve the Gas Flow condensation effect in sample feed channel 5, and cost is minimum.In addition, the second heat conduction jig arm 8 contacts with the cold junction of refrigerating sheet 9, the hot junction of described refrigerating sheet 9 contacts with a side of heat transfer sheet 12, the opposite side of heat transfer sheet 12 is provided with water-cooled tube 10, this water-cooled tube 10 is for taking in time the heat in refrigerating sheet 9 hot junctions out of coal gas pretreatment unit, the material of the heat transfer sheet 12 in the present embodiment is copper material, and above-mentioned refrigerating sheet 9 is connected with ECU 15, and this ECU 15 is worked for controlling refrigerating sheet 9.
A kind of blast furnace coal gas continuous analysis system in the present embodiment in use, when Gas Flow passes through the steel wire cleaning ball in sample feed channel 5, dust is attached on steel wire cleaning ball, simultaneously, it is water droplet that the effect of refrigerating sheet 9 condensations makes the condensate moisture in Gas Flow, this water droplet is also attached on steel wire cleaning ball, because whole sample feed channel 5 vertically arranges, water droplet is because the cause flow of gravity is to the bottom of sample feed channel 5, in this process, water droplet is taken away the dust being attached on steel wire cleaning ball, turn back to together in blast furnace gas pipeline 14, water droplet can play the effect of cleaning wire cleaning ball, whole process implementation the self-cleaning function of coal gas pretreatment unit, make coal gas pretreatment unit of the present invention without carrying out timing N
2blowback operation, can realize serial sampling and purify, then can enter gas chromatograph 17 through secondary-cleaned device 16 sample gas after treatment and analyze.For the coal gas pretreatment unit experiment Analysis in the present invention, Gas Flow is after this coal gas pretreatment unit is processed, and dust content is by 4mg/m
3drop to 0.5mg/m
3, moisture content is by 8g/m
3drop to 0.5g/m
3, obvious processing effect.
A kind of blast furnace coal gas continuous analysis system of the present invention, realize top gas composition is provided continuously online, compared with hand sampling chemical examination, there is real-time, continuity, the advantage such as accurate and visual, blast furnace section chief is judged in time the working of a furnace, regulates the working of a furnace, monitoring coal powder injection, judges that water leakage of cooler and the burned hotblast stove of auxiliary hot blast work etc. have very big help.This blast furnace coal gas continuous analysis system is not only analyzed accurately, and simple in structure, maintenance is little, and less investment, stable, to blast furnace direct motion steady in a long-term, improve coal gas utilising efficiency, reduce coke ratio etc. and have vital role, has significant economic benefit.
Below schematically the present invention and embodiment thereof are described, this description does not have restricted, and shown in accompanying drawing is also one of embodiments of the present invention, and actual structure is not limited to this.So, if those of ordinary skill in the art is enlightened by it, in the situation that not departing from the invention aim, without the creationary frame mode similar to this technical scheme and the embodiment of designing, all should belong to protection scope of the present invention.
Claims (5)
1. a blast furnace coal gas continuous analysis system, comprise coal gas pretreatment unit, secondary-cleaned device (16), gas chromatograph (17) and data processing unit (18), it is characterized in that: described coal gas pretreatment unit bottom is connected with sample gas stopple coupon, the depth of penetration of this sample gas stopple coupon is 1/2 ~ 1/3 of gas line (14) caliber, the cut of sample gas stopple coupon and Gas Flow opposite direction, described coal gas pretreatment unit top is connected with the entrance of secondary-cleaned device (16), the outlet of this secondary-cleaned device (16) is connected to gas chromatograph (17), described data processing unit (18) is connected with gas chromatograph (17), wherein:
Described coal gas pretreatment unit, comprise cylinder (11), cap (13), sample gas import (1), sample gas outlet (6), thermal insulation layer (4) and dehydration dedusting assembly, described cylinder (11) is hollow structure and vertically arranges, the bottom of this cylinder (11) is fixed with the cap (13) of conical structure, described cap (13) bottom is provided with sample gas import (1), and described cylinder (11) top is provided with sample gas outlet (6), in described cylinder (11), be provided with thermal insulation layer (4), this thermal insulation layer (4) inside is provided with dehydration dedusting assembly, described dehydration dedusting assembly comprises fixed muffle (2), the first jig arm (3), the second heat conduction jig arm (8), sample feed channel (5), filter element replacing mouth (7), refrigerating sheet (9), water-cooled tube (10), heat transfer sheet (12) and ECU (15), wherein: described cylinder (11) inside is vertically provided with sample feed channel (5), described sample feed channel (5) bottom is through fixed muffle (2), this sample feed channel (5) lower end is connected with sample gas import (1), sample feed channel (5) upper end is provided with filter element replacing mouth (7), this upper end is connected with sample gas outlet (6), and be provided with filter core in this sample feed channel (5), one side of described sample feed channel (5) is provided with the first jig arm (3), opposite side is provided with the second heat conduction jig arm (8), above-mentioned the first jig arm (3) and the second heat conduction jig arm (8) are wrapped in the periphery edge of sample feed channel (5) jointly, the second described heat conduction jig arm (8) contacts with the cold junction of refrigerating sheet (9), the hot junction of described refrigerating sheet (9) contacts with a side of heat transfer sheet (12), the opposite side of heat transfer sheet (12) is provided with water-cooled tube (10), above-mentioned refrigerating sheet (9) is connected with ECU (15), this ECU (15) is for controlling refrigerating sheet (9) work.
2. a kind of blast furnace coal gas continuous analysis system according to claim 1, is characterized in that: described secondary-cleaned device (16) is provided with the weldless steel tube of end cap for two ends, and steel wire cleaning ball is equipped with in this weldless steel tube inside.
3. a kind of blast furnace coal gas continuous analysis system according to claim 1, is characterized in that: the filter core in described sample feed channel (5) is steel wire cleaning ball.
4. according to a kind of blast furnace coal gas continuous analysis system described in claim 2 or 3, it is characterized in that: the second described heat conduction jig arm (8) and the material of heat transfer sheet (12) are copper material.
5. a kind of blast furnace coal gas continuous analysis system according to claim 4, is characterized in that: described fixed muffle (2) and the material of the first jig arm (3) are nylon material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310113996.2A CN103225006B (en) | 2013-04-03 | 2013-04-03 | Continuous analysis system of blast-furnace integrated gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310113996.2A CN103225006B (en) | 2013-04-03 | 2013-04-03 | Continuous analysis system of blast-furnace integrated gas |
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| Publication Number | Publication Date |
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| CN103225006A CN103225006A (en) | 2013-07-31 |
| CN103225006B true CN103225006B (en) | 2014-07-23 |
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Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1195107A (en) * | 1997-03-27 | 1998-10-07 | 马鞍山钢铁股份有限公司 | Purifying pre-treater for coal gas analyzer |
| CN2444229Y (en) * | 2000-08-18 | 2001-08-22 | 王勃 | Monitoring sampling gun for flue |
| DE102004024070B3 (en) * | 2004-05-13 | 2005-11-03 | Bruker Biospin Gmbh | Drying of SPE cartridges |
| CN102095609B (en) * | 2010-11-18 | 2012-08-22 | 山西省电力公司电力科学研究院 | Smoke sampling and dewatering device |
| CN102305738B (en) * | 2011-07-21 | 2014-12-03 | 赵勇纲 | Device used for filtering, dehumidificating and mixing smoke |
| CN203128603U (en) * | 2013-04-03 | 2013-08-14 | 安徽工业大学 | Compressive coal gas continuous analysis system of blast furnace |
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2013
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