CN1195073C - Oxygen supplying flow of oxygen-rich coal injection in blast furnace iron making - Google Patents
Oxygen supplying flow of oxygen-rich coal injection in blast furnace iron making Download PDFInfo
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- CN1195073C CN1195073C CN 03117856 CN03117856A CN1195073C CN 1195073 C CN1195073 C CN 1195073C CN 03117856 CN03117856 CN 03117856 CN 03117856 A CN03117856 A CN 03117856A CN 1195073 C CN1195073 C CN 1195073C
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- oxygen
- air
- blast furnace
- supply flow
- enriched
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- Manufacture Of Iron (AREA)
- Blast Furnaces (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention provides an oxygen supply flow for adopting a device for separating air by a PAS absorption method or a VPAS adsorption method, a compression expansion deep cooling method for outputting oxygen gas under normal pressure and a membrane separation method to provide enriched oxygen to an enriched oxygen coal injection process for making iron in a blast furnace. The adopted oxygen supply flow can satisfy the device requirements for the enriched oxygen supply flow when the enriched oxygen coal injection iron making production capacity is greatly enhanced in the mode of low cost.
Description
Technical field
The invention belongs to the blast furnace iron-making process technical field, particularly the oxygen supply flow and method of oxygen-enriched coal spray technology.
Prior art
Existing blast furnace ironmaking is to adopt oxygen-enriched coal spray technology for one of way of reducing cost, because oxygen-enriched coal spray is smelted iron required oxygen enrichment, the higher oxygen of pressure that obtains by compression-expansion cryogenic technology separation of air or membrane separating air technology normally, for the oxygen supply of blast furnace ironmaking oxygen-enriched coal spray technology the time, just can only adopt the oxygen supply flow process shown in the Figure of description 1, be that air 4 is after air separation equipment 5 is made oxygen, must through decompression process just with air 1 in the pipeline of air-blaster 2 outlets, sending into iron-smelting blast furnace 3 after being mixed into the desired oxygen-rich air of oxygen enriched blast coal injection iron-smelting process.Adopt this oxygen supply flow process to provide oxygen enrichment to have following shortcoming for oxygen-enriched coal spray ironmaking: 1 high pressure oxygen through reducing pressure after with pressurization after air mixes in the air-blaster outlet impossible even, thereby cause coal powder injection incendiary high temperature gas flow temperature distributing disproportionation to be spared; The 2 higher oxygen of pressure that made by compression-expansion cryogenic technology separation of air or membrane separating technology are sneaked in the air behind the gas blower, exist a huge pressure and fall, thereby cause skimble-skamble available energy loss process, and this obviously is uneconomic; 3 adopt oxygen that PSA or VPSA system oxygen technology provides because pressure is not high, again through reducing pressure after with regard in the more impossible adding air-blaster outlet pipe.So it is the oxygen supply gas requirement of blast furnace ironmaking oxygen-enriched coal spray technology that this flow process is not suitable for adopting PSA with low cost or VPSA system oxygen especially.
In sum, the oxygen supply flow process of existing blast furnace ironmaking oxygen-enriched coal spray exists the shortcoming that can not further reduce cost.
Summary of the invention
The objective of the invention is for society disclose a kind of can guarantee oxygen enrichment must mix full and uniform, do not have available energy loss, and be particularly suitable for adopting low-cost PSA or VPSA system oxygen that the oxygen supply flow process of oxygen enrichment is provided for blast furnace ironmaking oxygen-enriched coal spray technology.
One of oxygen supply flow process of the present invention as shown in Figure 2, it is that investment is low, the pressure that PSA that running cost is low or VPSA absorption method make is-10kPa～100kPa, concentration is that 22%～95% oxygen enrichment directly is added in the inlet pipe of blast furnace ironmaking gas blower, utilize swiftly flowing air in its inlet pipe, particularly gas blower internal rotation parts form to such an extent that high velocity turbulent flow comes the oxygen enrichment of thorough mixing adding, thereby the oxygen enrichment of adding and the uniform mixing of air have not only been guaranteed, and overcome the high pressure oxygen that adopts compression-expansion cryogenic technology separation of air or membrane process craft separation of air to obtain effectively, inject the air-blaster outlet pipe because of pressure reduce with the available energy loss.Solved and adopted PSA or the VPSA absorption method oxygenerator that investment is low and running cost is also low, the technical difficulty of cheap oxygen enrichment is provided for blast furnace ironmaking oxygen-enriched coal spray technology.The used oxygen enrichment of blast furnace ironmaking oxygen-enriched coal spray obtains by PSA or VPSA fractionation by adsorption air, membrane separating air and compression-expansion separation of air.
Oxygen supply flow process of the present invention two as shown in Figure 3, to be the pressure that makes of investment is low, PSA that running cost is also low or VPSA absorption method be-10kPa～100kPa for it, concentration is 22%～95% oxygen, pass through in the blast furnace ironmaking air-blaster outlet pipe that reinjects after press is boosted, for guaranteeing that oxygen enrichment mixes, ground, the back oxygen inlet that boosts should be tried one's best near the air-blaster outlet, and the duct length of air after the oxygen inlet and oxygen mix section must not be lower than 10 times of its pipe diameter.Adopt this flow process and correlation technique requirement, the low-cost low pressure oxygen that PSA or VPSA absorption method are made can mix in the air-blaster outlet, for oxygen-enriched coal spray ironmaking provides the oxygen enrichment that satisfies its processing requirement, and overcome the high pressure oxygen that adopts compression-expansion cryogenic technology or membrane separating technology to obtain effectively, inject the air-blaster outlet pipe because of pressure reduce with the available energy loss.This oxygen supply flow process is effective especially must to have solved the device demand that needs low cost, when increasing substantially oxygen-enriched coal spray ironmaking throughput oxygen enrichment is supplied with flow process.
Description of drawings
Fig. 1: the oxygen supply flow process that existing compression-expansion cryogenic technology or membrane separating technology system oxygen provide for blast furnace ironmaking oxygen-enriched coal spray technology.
Fig. 2: the oxygen supply flow process 1 that PSA of the present invention or VPSA absorption legal system oxygen provide for blast furnace ironmaking oxygen-enriched coal spray technology.
Fig. 3: the oxygen supply flow process 2 that PSA of the present invention or VPSA absorption legal system oxygen provide for blast furnace ironmaking oxygen-enriched coal spray technology.
Embodiment
The specific embodiment of the present invention such as Fig. 2, shown in Figure 3, the oxygen decompression process 6 that the flow process of different with Fig. 1 is Fig. 2, blast furnace ironmaking oxygen-enriched coal spray oxygen supply shown in Figure 3 does not waste energy.
When the amplitude that is not enlarged or enlarge oxygen-enriched coal spray ironmaking throughput by the blast furnace for oxygen enrichment is little, adopt oxygen supply flow process shown in Figure 2, the low oxygen that to be air 4 make through PSA or VPSA air separation plant 5 enters air-blaster with gas blower 2 inhaled airs 1 and sends into iron-smelting furnace 3 after pressurized.Realized adopting PSA cheaply or VPSA system oxygen that the requirement of oxygen enrichment is provided for blast furnace ironmaking oxygen-enriched coal spray technology.
When need be enlarged oxygen-enriched coal spray ironmaking throughput by a relatively large margin by the blast furnace of oxygen supply the time, adopt oxygen supply flow process shown in Figure 3, the low oxygen that to be air 4 make through PSA or VPSA air separation plant 5 is sent into iron-smelting furnace 3 with air-blaster 2 inhaled airs 1 after the outlet of air-blaster 2 mixes after press 6 is boosted.Solved the device demand that needs low cost, when increasing substantially oxygen-enriched coal spray ironmaking throughput oxygen enrichment is supplied with flow process effectively.
The present invention is applicable to PSA or VPSA absorption legal system oxygen, compression-expansion cryogenic air separation or membrane separating air system oxygen.
Claims (1)
1. the oxygen supply flow process of blast furnace ironmaking oxygen-enriched coal spray, described flow process comprises air-blaster, iron-smelting furnace, air separation plant, it is characterized in that: used oxygen enrichment is low pressure or normal pressure, be added in during oxygen supply before the blast furnace blowing engine suction port together to be sucked and be mixed into the required oxygen enrichment of oxygen enriched blast coal injection iron-smelting process and send into blast furnace by blast furnace blowing engine with air, the used oxygen enrichment pressure of oxygen supply flow process is-10kPa～100kPa, the oxygen-rich concentration of air separation plant output is 22%～95%, and the used oxygen enrichment of blast furnace ironmaking oxygen-enriched coal spray is by PSA or VPSA fractionation by adsorption air, membrane separating air and compression-expansion separation of air obtain.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117856 CN1195073C (en) | 2003-05-13 | 2003-05-13 | Oxygen supplying flow of oxygen-rich coal injection in blast furnace iron making |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03117856 CN1195073C (en) | 2003-05-13 | 2003-05-13 | Oxygen supplying flow of oxygen-rich coal injection in blast furnace iron making |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1467299A CN1467299A (en) | 2004-01-14 |
| CN1195073C true CN1195073C (en) | 2005-03-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03117856 Ceased CN1195073C (en) | 2003-05-13 | 2003-05-13 | Oxygen supplying flow of oxygen-rich coal injection in blast furnace iron making |
Country Status (1)
| Country | Link |
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| CN (1) | CN1195073C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808053A (en) * | 2012-09-05 | 2012-12-05 | 李东林 | Oxygen-rich dry gas supply device for blast furnace iron-making |
| CN102808056A (en) * | 2012-09-05 | 2012-12-05 | 李东林 | Oxygen-enriched dry gas supply process for blast furnace iron-making |
| CN103014205A (en) * | 2012-12-31 | 2013-04-03 | 中冶京诚工程技术有限公司 | Oxygen supply method for oxygen-enriched coal injection of blast furnace |
| CN111646433B (en) * | 2020-06-18 | 2022-04-01 | 中冶沈勘秦皇岛工程设计研究总院有限公司 | Oxygen generation equipment, oxygen generation method using same and smelting equipment |
| CN115074546A (en) * | 2021-08-12 | 2022-09-20 | 昆山易氧空分科技有限公司 | Oxygen supply process for smelting lead by oxygen-enriched side-blown furnace and application |
-
2003
- 2003-05-13 CN CN 03117856 patent/CN1195073C/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| CN1467299A (en) | 2004-01-14 |
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Owner name: CHENGDU HUAXI CHEMICALS INSTITUTE CO., LTD. Free format text: FORMER NAME: XIHUA CHEMICAL ENGINEERING INST., CHENGDU |
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Address after: 610000 Ma Jia 2, Ma Jia, Jinniu District, Sichuan, Chengdu, Huayuan Road Patentee after: CHENGDU HUAXI CHEMICAL INSTITUTE CO.,LTD. Address before: Chadianzi Chengdu Street No. 11 of 610036 cities in Sichuan Province Patentee before: Chengdu Huaxi Chemical Engineering Research Institute |
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Decision date of declaring invalidation: 20230105 Decision number of declaring invalidation: 59337 Granted publication date: 20050330 |