CN102851438B - Converter coal gas waste heat utilization apparatus - Google Patents
Converter coal gas waste heat utilization apparatus Download PDFInfo
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- CN102851438B CN102851438B CN201210326772.5A CN201210326772A CN102851438B CN 102851438 B CN102851438 B CN 102851438B CN 201210326772 A CN201210326772 A CN 201210326772A CN 102851438 B CN102851438 B CN 102851438B
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- spray drying
- drying tower
- acid
- coal gas
- heat exchanger
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides a converter coal gas waste heat utilization apparatus, and relates to the technical field of waste heat utilization. The apparatus comprises a first stage spray drying tower and a second stage spray drying tower, wherein the first stage spray drying tower and the second stage spray drying tower are connected in series. An air inlet pipe on the lower end of the first stage spray drying tower is connected with an air inlet fan. The upper end of the second stage spray drying tower is connected with an air outlet fan. An air outlet of the air outlet fan is connected with a coal cabinet connection pipe. On end of a low concentration acid storage tank is connected with the lower end of the first stage spray drying tower, and the other end of the low concentration acid storage tank is connected with one end of an evaporator of a graphite heat exchanger through a first material inlet pump. The other end of the evaporator of the graphite heat exchanger is connected with a spray total pipe of the first stage spray drying tower. Both ends of a condenser of the graphite heat exchanger are connected with steam drums. One end of a high concentration acid storage tank is connected with the lower end of the second stage spray drying tower, the other end of the high concentration acid storage tank is connected with one end of an evaporator of a heat exchanger through a second material inlet pump. The other end of the evaporator of the heat exchanger is connected with a spray total pipe of the second stage spray drying tower. With the present invention, water content in the coal gas is reduced, and the coal gas holder utilization efficiency is improved.
Description
Technical field
The present invention relates to a kind ofly for metallurgy, the heat recovery technology of chemical field, relates in particular to the waste heat utilization technology field for coal gas of converter.
Background technology
In coal gas of converter, containing large quantity of moisture, need to be dried, is that moisture content in gas meets certain index.The method of converter current coal gas drying, dedusting has two kinds of dry method and wet methods.
Converter gas dry-dedusting system technical process is: the converter gas of approximately 1550 ℃ is taken out under the effect of drawing blower fan, through flue-gas-cooling system (movable gas hood, heat reclamation device and gasification cooling flue), enter evaporative cooler after making temperature be down to 800～1200 ℃.In evaporative cooler, there is several pair of medium atomization cooling jet, to flue gas lower the temperature, modified, thick dedusting, flue-gas temperature is reduced to 150～200 ℃, approximately have 40% dust to be hunted down under the effect of evaporative cooler, the crude particle dust of formation is inputted cinder feed bin by chain conveyor simultaneously.Through cooling, thick dedusting and modified after flue gas enter round shape electrostatic precipitator, flue gas dustiness after electrostatic precipitator dedusting is down to below 10mg/m3.The thin ash that electrostatic precipitator is collected, is discharged to thin flue dust storehouse through fan shaped scraper device, bottom chain conveyor and thin grey e Foerderanlage.After the qualified flue gas of electrostatic precipitator essence dedusting cools to 70～80 ℃ by gas cooler, enter gas chamber, the coal gas of oxygen level >2% diffuses by torch assembly.Whole system adopts automatically and controls, and combines with the control of converter.
Wet purification system typical process is: coal gas goes out after converter, through blister cooler, be cooled to 800～1000 ℃, then order is through one-level venturi, the first elbow separator, secondary Venturi meter, the second elbow separator, at Venturi meter aditus laryngis place, spray with washing water, gas temperature is down to 35 ℃ of left and right, and dustiness in coal gas is down to approximately 100 milligrams/cubic metre.Then with vacuum fan, the gas of purification is sent into gas storage holder.
Although dry, wet method gas purification process has been realized the udst separation to coal gas of converter, in coal gas, heat is to be all converted into latent heat by sensible heat, is not utilized effectively.At present, the market requirement that low temperature exhaust heat reclaims is urgent, and is being still blank out aspect the dry heat recovery technology of coal gas of converter acid.
Summary of the invention
The object of the invention is to provide and a kind ofly can effectively realizes dry coal gas, reduces moisture content in gas, improves the coal gas of converter waste heat utilization device of gas chamber utilising efficiency.
The present invention includes one-level spray drying tower and the secondary spray drying tower of mutual series connection, lower end at one-level spray drying tower connects blast pipe, on blast pipe, connect air intake blower fan, upper end at secondary spray drying tower connects air outlet tube, on air outlet tube, connect air-out blower fan, at the air outlet connection gas chamber pipe connecting of air-out blower fan; One end of lower concentration acid acid accumulator storage is connected to the lower end of one-level spray drying tower, and the other end is connected to one end of the vaporizer of graphite heat exchanger by the first fresh feed pump, and the other end of the vaporizer of graphite heat exchanger is connected with the spray house steward of one-level spray drying tower; The two ends of the condenser of graphite heat exchanger are connected with drum; One end of high concentrated acid acid accumulator storage is connected to the lower end of secondary spray drying tower, and the other end is connected to one end of the vaporizer of interchanger by the second fresh feed pump, and the other end of the vaporizer of interchanger is connected with the spray house steward of secondary spray drying tower; The two ends of the condenser of interchanger are connected with cooling circulating water.
Principle of work of the present invention:
Drum is the heat-transfer medium of the condenser of graphite heat exchanger, lower concentration acid is the heat-transfer medium of the vaporizer of graphite heat exchanger, the heat exchange in graphite heat exchanger of two media, make lower concentration acid keep low temperature, through the first fresh feed pump, pump into the spray house steward of one-level spray drying tower, the coal gas of being introduced is carried out to the first step be dried by air intake blower fan.
Cooling circulating water is the heat-transfer medium of the condenser of interchanger, high concentrated acid is the heat-transfer medium of the vaporizer of interchanger, the heat exchange in interchanger of two media, make high concentrated acid keep low temperature, to entering coal gas in secondary spray drying tower, carry out second dry, under the effect of air-out blower fan, by gas chamber pipe connecting, entered in gas chamber.
Tool of the present invention has the following advantages:
1, the present invention utilizes iron and steel enterprise's internal resource advantage, carries out effective recycling of resource, without any starting material of outsourcing.Coke-oven plant's tail gas of the mostly supporting setting of iron and steel enterprise is washed the ammonia outsourcing vitriol oil, as siccative.Sulfuric acid after dilution returns to coking and again after moisturizing, uses.Because coal gas is through udst separation, dust content is: 10～20mg/Nm
3, and gas dust component is mainly calcium, magnesium, iron, is applicable to sulfuric acid.
2, the present invention utilizes the vitriol oil to absorb the moisture in coal gas of converter, has improved caloric power of gas, has improved the quality of coal gas of converter, thereby has greatly improved the effective rate of utilization of gas chamber.
3, in the moisture of the present invention in absorbing coal gas, bring the heat of condensation of steam into sulfuric acid system, add the nitration mixture heat producing in the heat of dilution of emitting in sulfuric acid dilution and complex acid process, after going out tower, sulfuric acid temperature can reach 140～200 ℃, for effectively utilizing this part heat to create condition.
4, middle and high concentration acid of the present invention and lower concentration acid, in dry moisture, are diluted, and for ensuing complex acid, have saved great lot of water resources, have reduced the energy consumption of enterprise.
5, the present invention has good environmental-protecting performance, environment is not caused to secondary pollution, and has eliminated the waste water producing in original gas chamber.
Due in spray drying process, can there is loss in acid, and its concentration also can change, and for timely adjustment, the present invention also connects lower concentration acid and mends acid mouthful on lower concentration acid acid accumulator storage.
In like manner, on high concentrated acid acid accumulator storage, connect high concentrated acid and mend acid mouthful.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present invention.
Embodiment
In figure: 1 air intake blower fan; 2 one-level spray drying towers; 3 lower concentration acid acid accumulator storages; 4 graphite heat exchangers; 5 drums; 6 interchanger; 7 first fresh feed pumps; 8 high concentrated acid acid accumulator storages; 9 secondary spray drying towers; 10 air-out blower fans; 11 second fresh feed pumps; 12 blast pipes; 13 air outlet tubes; 14 gas chamber pipe connectings; 15 bypass pipes; 16 by-product acid outlet pipes.
As shown in Figure 1, the present invention is provided with one-level spray drying tower 2 and the secondary spray drying tower 9 of mutual series connection, lower end at one-level spray drying tower 2 connects blast pipe 12, on blast pipe 12, connect air intake blower fan 1, upper end at secondary spray drying tower 9 connects air outlet tube 13, on air outlet tube 13, connect air-out blower fan 10, at the air outlet connection gas chamber pipe connecting 14 of air-out blower fan 10.
One end of lower concentration acid acid accumulator storage 3 is connected to the lower end of one-level spray drying tower 2, the other end is connected to one end of the vaporizer of graphite heat exchanger 4 by the first fresh feed pump 7, the other end of the vaporizer of graphite heat exchanger 4 is connected with the spray house steward of one-level spray drying tower 2.The two ends of the condenser of graphite heat exchanger 4 are connected with drum 5.
One end of high concentrated acid acid accumulator storage 8 is connected to the lower end of secondary spray drying tower 9, and the other end is connected to one end of the vaporizer of interchanger 6 by the second fresh feed pump 11, and the other end of the vaporizer of interchanger 6 is connected with the spray house steward of secondary spray drying tower 9.The two ends of the condenser of interchanger 6 are connected with cooling circulating water.
On high concentrated acid acid accumulator storage 8, connect high concentrated acid and mend acid mouth 81.
On lower concentration acid acid accumulator storage 3, connect lower concentration acid and mend acid mouth 31.Bypass pipe 15 of the install pipeline that exports to interchanger 6 of high concentrated acid acid accumulator storage 8, the other end of bypass pipe 15 is mended acid mouth 31 with lower concentration acid and is connected, an acid solution part in high concentrated acid acid accumulator storage 8 enters interchanger 6, another part is mended acid mouth 31 from lower concentration acid and is entered lower concentration acid acid accumulator storage 3, for altering acid.
Lower concentration acid enters and otherly the pipeline between one-level spray drying tower 2 connects an outlet pipe 16 from the outlet of graphite heat exchanger 4, for the acid of output byproduct lower concentration.
Claims (3)
1. coal gas of converter waste heat utilization device, it is characterized in that: the one-level spray drying tower and the secondary spray drying tower that comprise mutual series connection, lower end at one-level spray drying tower connects blast pipe, on blast pipe, connect air intake blower fan, upper end at secondary spray drying tower connects air outlet tube, on air outlet tube, connect air-out blower fan, at the air outlet connection gas chamber pipe connecting of air-out blower fan; One end of lower concentration acid acid accumulator storage is connected to the lower end of one-level spray drying tower, and the other end is connected to one end of the vaporizer of graphite heat exchanger by the first fresh feed pump, and the other end of the vaporizer of graphite heat exchanger is connected with the spray house steward of one-level spray drying tower; The two ends of the condenser of graphite heat exchanger are connected with drum; One end of high concentrated acid acid accumulator storage is connected to the lower end of secondary spray drying tower, and the other end is connected to one end of the vaporizer of interchanger by the second fresh feed pump, and the other end of the vaporizer of interchanger is connected with the spray house steward of secondary spray drying tower; The two ends of the condenser of interchanger are connected with cooling circulating water.
2. coal gas of converter waste heat utilization device according to claim 1, is characterized in that: on lower concentration acid acid accumulator storage, connect lower concentration acid and mend acid mouthful.
3. according to coal gas of converter waste heat utilization device described in claim 1 or 2, it is characterized in that: on high concentrated acid acid accumulator storage, connect high concentrated acid and mend acid mouthful.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210326772.5A CN102851438B (en) | 2012-09-06 | 2012-09-06 | Converter coal gas waste heat utilization apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210326772.5A CN102851438B (en) | 2012-09-06 | 2012-09-06 | Converter coal gas waste heat utilization apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN102851438A CN102851438A (en) | 2013-01-02 |
| CN102851438B true CN102851438B (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210326772.5A Active CN102851438B (en) | 2012-09-06 | 2012-09-06 | Converter coal gas waste heat utilization apparatus |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1032023A2 (en) * | 1981-07-06 | 1983-07-30 | Украинский Государственный Институт По Проектированию Металлургических Заводов | Method for protecting oxygen tuyerers in bottom blow converters |
| CN100419090C (en) * | 2007-04-06 | 2008-09-17 | 上海宝钢工程技术有限公司 | Converter coal gas wet-type cloth bag purification recovering process and system |
| CN201924036U (en) * | 2010-11-25 | 2011-08-10 | 中冶东方工程技术有限公司上海分公司 | Wet dust removal device for converter |
| CN202865253U (en) * | 2012-09-06 | 2013-04-10 | 扬州高立达科技产业有限公司 | Converter gas waste heat utilizing device |
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- 2012-09-06 CN CN201210326772.5A patent/CN102851438B/en active Active
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Effective date of registration: 20210927 Address after: No. 9, fumaying Road, Jinghe Town, Baoying County, Yangzhou City, Jiangsu Province 225800 Patentee after: Herong (Yangzhou) Environmental Protection Technology Co.,Ltd. Address before: 225800 Jinghe Industrial Zone, Baoying County, Yangzhou City, Jiangsu Province Patentee before: YANGZHOU GOLDSTAR TECHNOLOGY INDUSTRY Co.,Ltd. |
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