CN107955848B - Oxygen enrichment device in front of blast furnace machine - Google Patents
Oxygen enrichment device in front of blast furnace machine Download PDFInfo
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- CN107955848B CN107955848B CN201711444328.2A CN201711444328A CN107955848B CN 107955848 B CN107955848 B CN 107955848B CN 201711444328 A CN201711444328 A CN 201711444328A CN 107955848 B CN107955848 B CN 107955848B
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 246
- 239000001301 oxygen Substances 0.000 title claims abstract description 246
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 246
- 239000007789 gas Substances 0.000 claims abstract description 37
- 230000001105 regulatory effect Effects 0.000 claims abstract description 30
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 59
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 23
- 229910052757 nitrogen Inorganic materials 0.000 claims description 18
- 238000005520 cutting process Methods 0.000 claims description 14
- 238000012360 testing method Methods 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 8
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 4
- 229910001882 dioxygen Inorganic materials 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000000571 coke Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003137 locomotive effect Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention provides a front oxygen-enriched device of a blast furnace, which relates to the technical field of metallurgical equipment, and comprises an oxygen conveying pipeline, an oxygen mixer, an oxygen content detector and a blast furnace blower which are sequentially connected in series, wherein a flow regulating valve and a shut-off valve which are sequentially arranged along the direction of oxygen conveying are arranged on the oxygen conveying pipeline, an air conveying pipeline is communicated with the oxygen mixer, the front oxygen-enriched device of the blast furnace further comprises a control unit, and the oxygen content detector and the flow regulating valve are electrically connected with the control unit. The oxygen enrichment device in front of the blast furnace provided by the invention can effectively control the oxygen content of the mixed gas, and ensure the production efficiency and the production safety.
Description
Technical Field
The invention relates to the technical field of metallurgical equipment, in particular to a device for enriching oxygen in front of a blast furnace.
Background
Oxygen-enriched blast is one of the effective means for strengthening smelting in blast furnaces. In recent years, the effect is remarkable by combining domestic and foreign oxygen-enriched air blast with a large amount of injected fuel as a main measure for reducing the coke ratio.
When the blast furnace inlet air quantity is unchanged, the blast air oxygen content is increased by 1%, namely the air quantity is increased by 4.76%. According to the test of iron and steel works, the yield of pig iron can be increased by about 3 percent. Oxygen-enriched air blast is adopted, so that the oxygen content of the air port is increased, and the blowing quantity is increased. Therefore, oxygen enrichment and blowing are combined, and the method is one of effective measures for obtaining stable yield, high yield and reducing the coke ratio.
The oxygen is added into the blower from different positions, and is divided into two kinds of oxygen enrichment before the machine and oxygen enrichment after the machine.
Oxygen enrichment after the machine, namely adding a certain amount of oxygen at a certain position between the outlet of the air blower and the blast furnace, wherein the oxygen enrichment after the machine needs to compress the oxygen, at present, the oxygen is basically pressurized through an oxygen compressor, and then the pressurized oxygen is mixed with air conveyed by the air blower.
Oxygen enrichment before the machine, namely oxygen is sent into an air suction system from an air suction pipe of a blast furnace blower, mixed with air and then sent to a blast furnace by being pressurized by the blast furnace blower. The pressure of oxygen added by oxygen enrichment in front of the machine is low, an expensive oxygen compressor can be omitted, energy loss is reduced, and the defect that oxygen is wasted in the operation of ventilation is overcome. In addition, the oxygen enrichment rate of the mixed gas needs to be strictly controlled before the machine, so that production accidents such as fire disaster and the like are avoided.
In view of this, the present inventors have developed a pre-machine oxygen enrichment apparatus for a blast furnace based on production design experience in the field and related fields for many years, in order to solve the problems of the prior art.
Disclosure of Invention
The invention aims to provide an oxygen-enriched device in front of a blast furnace machine, which can effectively control the oxygen content of mixed gas and ensure the production efficiency and the production safety.
In order to achieve the above purpose, the invention provides a pre-blast furnace oxygen-enriching device, wherein the pre-blast furnace oxygen-enriching device comprises an oxygen conveying pipeline, an oxygen mixer, an oxygen content detector and a blast furnace blower which are sequentially connected in series, a flow regulating valve and a cut-off valve which are sequentially arranged along the direction of oxygen conveying are arranged on the oxygen conveying pipeline, an air conveying pipeline is communicated with the oxygen mixer, and the pre-blast furnace oxygen-enriching device further comprises a control unit, and the oxygen content detector and the flow regulating valve are electrically connected with the control unit.
The oxygen enrichment device in front of the blast furnace machine, wherein an oxygen quick-cut valve is further arranged between the flow regulating valve and the cut-off valve, and the oxygen quick-cut valve and the blast furnace blower are electrically connected with the control unit.
The oxygen enrichment device before the blast furnace machine, which is described above, further comprises a nitrogen gas conveying pipeline, wherein the nitrogen gas conveying pipeline is communicated with the oxygen gas conveying pipeline and is arranged between the cut-off valve and the oxygen fast-cutting valve, the nitrogen gas conveying pipeline is provided with the nitrogen gas fast-cutting valve, and the nitrogen gas fast-cutting valve is electrically connected with the control unit.
The pre-blast furnace oxygen enrichment apparatus as described above, wherein the gas pressure in the nitrogen delivery conduit is greater than the gas pressure in the oxygen delivery conduit.
The oxygen enrichment device before a blast furnace machine, wherein the gas pressure in the nitrogen conveying pipeline is 0.8MPa.
The oxygen enrichment device in front of the blast furnace machine, wherein the oxygen conveying pipeline is further provided with a flame arrester, and the flame arrester is arranged between the nitrogen conveying pipeline and the oxygen quick-cutting valve.
The oxygen enrichment device in front of the blast furnace machine, wherein one end of the oxygen conveying pipeline is connected with the oxygen mixer, the other end of the oxygen conveying pipeline is connected with the oxygen pressure machine room, a filter is further arranged on the oxygen conveying pipeline, and the filter is arranged between the flow regulating valve and the oxygen machine room.
The oxygen enrichment device in front of the blast furnace machine, wherein the oxygen transmission pipeline is further provided with an oxygen cut-off valve, the oxygen cut-off valve is arranged between the oxygen compressor room and the filter, and the oxygen cut-off valve is electrically connected with the control unit.
The oxygen enrichment device in front of the blast furnace machine, wherein the oxygen conveying pipeline is further provided with a pressure testing assembly and an oxygen flowmeter, the pressure testing assembly comprises a pressure transmitter and a pressure gauge, and the pressure gauge and the oxygen flowmeter are electrically connected with the control unit.
The oxygen enrichment device before a blast furnace machine as described above, wherein the shut-off valve is an electric shut-off valve, and the electric shut-off valve is electrically connected with the control unit.
Compared with the prior art, the invention has the following characteristics and advantages:
the oxygen content detector in the oxygen-enriched device in front of the blast furnace provided by the invention is used for detecting the concentration of oxygen in the mixed gas in the pipeline after being mixed by the oxygen mixer, and the flow regulating valve is used for controlling the content of oxygen in the mixed gas in the pipeline; simultaneously, the oxygen content detector and the flow regulating valve are connected with the control unit, and the linkage of the oxygen content detector and the flow regulating valve is realized through the control unit, so that the opening of the flow regulating valve can be regulated according to the oxygen concentration in the mixed gas in the pipeline, and the oxygen concentration in the mixed gas in the pipeline is ensured to be always in a preset range.
The oxygen content detector in the oxygen enrichment device in front of the blast furnace provided by the invention is arranged between the oxygen mixer and the blast furnace blower, namely, the oxygen content detector detects the oxygen concentration in the mixed gas before entering the blast furnace blower, the opening degree of the flow regulating valve is timely regulated according to the detection result, the oxygen concentration in the mixed gas before entering the blast furnace blower is ensured to be always in a preset range, and safety accidents such as fire disaster and the like caused by overhigh oxygen concentration in the mixed gas after entering the blast furnace blower are prevented, so that the safe operation of the blast furnace blower is ensured.
Drawings
The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present invention, and are not particularly limited. Those skilled in the art with access to the teachings of the present invention can select a variety of possible shapes and scale sizes to practice the present invention as the case may be.
FIG. 1 is a schematic diagram of an embodiment of a pre-locomotive oxygen enrichment apparatus for a blast furnace according to the present invention;
FIG. 2 is a schematic diagram of another embodiment of a pre-locomotive oxygen enrichment device for a blast furnace according to the present invention.
Reference numerals illustrate:
100. an oxygen-enriching device in front of the blast furnace; 110. An oxygen delivery conduit;
111. a flow regulating valve; 112. A shut-off valve;
113. an oxygen quick-cut valve; 114. A flame arrester;
115. a filter; 116. An oxygen shut-off valve;
117. a pressure testing assembly; 118. An oxygen flow meter;
120. an oxygen mixer; 130. An oxygen content detector;
140. a blast furnace blower; 150. An air delivery conduit;
160. a nitrogen gas delivery pipe; 161. A nitrogen quick-cutting valve;
170. an oxygen compressor room.
Detailed Description
The details of the invention will be more clearly understood in conjunction with the accompanying drawings and description of specific embodiments of the invention. However, the specific embodiments of the invention described herein are for the purpose of illustration only and are not to be construed as limiting the invention in any way. Given the teachings of the present invention, one of ordinary skill in the related art will contemplate any possible modification based on the present invention, and such should be considered to be within the scope of the present invention.
Referring to fig. 1 and 2, the pre-blast-furnace oxygen-enriching device 100 according to the present invention includes an oxygen delivery pipe 110, an oxygen mixer 120, an oxygen content detector 130 and a blast furnace blower 140 connected in series, wherein a flow control valve 111 and a shut-off valve 112 are installed on the oxygen delivery pipe 110 and are sequentially arranged along the direction of oxygen delivery, an air delivery pipe 150 is connected to the oxygen mixer 120, the pre-blast-furnace oxygen-enriching device 100 further includes a control unit (not shown in the figure), and the oxygen content detector 130 and the flow control valve 111 are electrically connected to the control unit.
The oxygen content detector 130 in the oxygen enrichment device 100 before the blast furnace provided by the invention is used for detecting the concentration of oxygen in the mixed gas in the pipeline after being mixed by the oxygen mixer 120, and the flow regulating valve 111 is used for controlling the content of oxygen in the mixed gas in the pipeline; meanwhile, the oxygen content detector 130 and the flow regulating valve 111 are both connected with the control unit, and the linkage of the oxygen content detector 130 and the flow regulating valve 111 is realized through the control unit, so that the opening of the flow regulating valve 111 can be regulated according to the oxygen concentration in the mixed gas in the pipeline, and the oxygen concentration in the mixed gas in the pipeline is ensured to be always in a preset range. Specifically, when the oxygen content detector 130 detects that the oxygen content in the mixed gas in the pipeline is low, that is, the oxygen amount provided by the oxygen delivery pipeline 110 is lower than the actually required oxygen, the opening of the large-flow regulating valve 111 is opened to increase the oxygen amount; when the oxygen content detector 130 detects that the oxygen content in the mixed gas in the pipeline is higher, that is, the oxygen content provided by the oxygen delivery pipeline 110 is higher than the required oxygen, the opening of the flow regulating valve 111 is closed to reduce the oxygen content.
The oxygen content detector 130 in the oxygen enrichment device 100 before the blast furnace provided by the invention is arranged between the oxygen mixer 120 and the blast furnace blower 140, namely, the oxygen content detector 130 detects the oxygen concentration in the mixed gas before entering the blast furnace blower 140, the opening degree of the flow regulating valve 111 is timely regulated according to the detection result, the oxygen concentration in the mixed gas before entering the blast furnace blower 140 is ensured to be always in a preset range, and safety accidents such as fire disaster and the like caused by the overhigh oxygen concentration in the mixed gas entering the blast furnace blower 140 are prevented, so that the safe operation of the blast furnace blower 140 is ensured.
In the present invention, the control unit (not shown) may be a PLC controller (programmable logic controller), for example.
In an alternative example of the present invention, an oxygen fast-cutting valve 113 is further installed between the flow rate adjusting valve 111 and the shut-off valve 112, and the blast furnace blower 140 and the oxygen fast-cutting valve 113 are electrically connected to the control unit. When the oxygen content of the mixed gas in the pipeline is too high or the blast furnace blower 140 fails, the oxygen quick cut valve 113 can cut off the oxygen transmission pipeline 110 in time, so that safety accidents are avoided. Specifically, when the oxygen concentration detected by the oxygen content detector 130 exceeds 23.5%, the control unit gives an alarm; when the oxygen concentration detected by the oxygen content detector 130 reaches 24%, the control unit needs to close the oxygen quick-cut valve 113 in a linkage manner; when the blast furnace blower 140 is in emergency stop or surge occurs, the control unit also needs to close the oxygen quick cut valve 113 in a linkage manner, so as to play a role of a protection system.
In an alternative example, the oxygen fast-cutting valve 113 is a pneumatic fast-cutting valve.
Further, the oxygen quick-cut valve 113 is a pneumatic butterfly valve.
In an alternative example of the present invention, the oxygen port on the oxygen mixer 120 is connected to the oxygen delivery pipe 110, and the atmospheric oxygen is fully mixed with air after entering the oxygen mixer 120 through the oxygen delivery pipe 110, and then enters the blast furnace blower 140 by using the micro negative pressure before the inlet of the blast furnace blower 140, thereby realizing the oxygen enrichment of the blast furnace.
In an alternative example of the present invention, the pre-blast furnace oxygen enrichment apparatus 100 further includes a nitrogen gas delivery pipe 160, wherein the nitrogen gas delivery pipe 160 is in communication with the oxygen gas delivery pipe 110 and is disposed between the shut-off valve 112 and the oxygen fast-cutting valve 113, and a nitrogen gas fast-cutting valve 161 is disposed on the nitrogen gas delivery pipe 160, and the nitrogen gas fast-cutting valve 161 is electrically connected to the control unit. The nitrogen gas conveying pipeline 160 is arranged between the cut-off valve 112 and the oxygen quick cut-off valve 113, is used for charging nitrogen gas after the blast furnace blower 140 is stopped, and is used for replacing and evacuating oxygen in the pipeline during the period of blast furnace damping down or blower stopping, so that fire disasters and the like caused by too high oxygen content are avoided, and the safety of the whole pipeline and the blast furnace blower is further ensured; in addition, when the blast furnace blower 140 is normally started, the nitrogen gas quick cut valve 161 is closed, and the nitrogen gas supply pipe 160 after the nitrogen gas quick cut valve 161 should be filled with protection nitrogen gas.
In an alternative example of the present invention, the gas pressure within the nitrogen delivery line 160 is greater than the gas pressure within the oxygen delivery line 110 to achieve the gas seal effect.
In an alternative example, the pressure of the nitrogen within nitrogen delivery line 160 is 0.8MPa.
Further, the oxygen gas is supplied into the oxygen supply line 110 at a low pressure of less than 0.8MPa.
In an alternative example, the pressure of the air within the air delivery conduit is 0.05MPa.
In an alternative example of the present invention, oxygen delivery conduit 110 is further provided with flame arrestor 114, flame arrestor 114 being disposed between nitrogen delivery conduit 160 and oxygen cut-off valve 113, further ensuring the safety of oxygen delivery conduit 110.
In an alternative example of the present invention, one end of the oxygen delivery pipe 110 is connected to the oxygen mixer 120, the other end of the oxygen delivery pipe 110 is connected to the oxygen compressor 170, and the oxygen delivery pipe 110 is further provided with a filter 115, and the filter 115 is installed between the flow rate adjusting valve 111 and the oxygen compressor 170. The filter 115 is used to remove impurities from the gas and purify the gas.
In an alternative example of the present invention, an oxygen shut-off valve 116 is further installed on the oxygen delivery pipe 110, the oxygen shut-off valve 116 being disposed between the oxygen pressing machine 170 and the filter 115, the oxygen shut-off valve 116 being electrically connected to the control unit. When the oxygen quick cut valve 113 is fully closed, the control unit sends an electric signal to the oxygen cut valve 116, and the oxygen cut valve 116 can cut off the oxygen supply system (i.e. cut off the communication between the oxygen pressure machine room 170 and the oxygen conveying pipeline 110) within 3-4 minutes, so that the production safety is further ensured.
In an alternative example of the present invention, the oxygen delivery pipe 110 is further provided with a pressure testing assembly 117 and an oxygen flow meter 118, wherein the pressure testing assembly 117 comprises a pressure transmitter and a pressure meter, and the pressure meter and the oxygen flow meter 118 are electrically connected to the control unit. The pressure testing component 117 is configured to measure the gas pressure in the oxygen delivery pipe 110 in real time, and the control unit may adjust the opening of the flow regulating valve 111 according to the gas pressure in the oxygen delivery pipe 110. The oxygen flow meter 118 is used for recording the flow rate of the gas in the oxygen conveying pipeline 110 in real time, and the maximum flow rate of the oxygen flow meter 118 is 13000Nm 3 Per h (standard cubic), conventional flow rates of 8000-13000Nm 3 /h (standard cube).
In an alternative example of the invention, the shut-off valve 112 is an electrically operated shut-off valve and is electrically connected to the control unit.
In an alternative example, the shut-off valve 112 is an electrically powered gate valve.
In an alternative example of the present invention, when an accident occurs, such as an emergency stop of the blast furnace blower 140, the control unit sends a closed electric signal to the oxygen quick cut valve 113 (also called a critical shut-off valve) after receiving the stop electric signal of the blast furnace blower 140, and the oxygen quick cut valve 113 is quickly closed; when the oxygen quick cut valve 113 is completely closed, the control unit sends an electric signal to the cut valve 112, and the cut valve 112 can completely cut off the oxygen supply system within 3-4 minutes. And, when the oxygen quick cut valve 113 is completely closed, the control unit sends an electric signal to the nitrogen quick cut valve 161, the nitrogen quick cut valve 161 is opened, and nitrogen is immediately fed. In the above process, since the shut-off valve 112 is slow to operate, residual partial oxygen can be discharged within three minutes of its full-closed process. Nitrogen simultaneously flows into the aspiration channel of blast furnace blower 140, diluting the oxygen enriched air in aspiration channel of blast furnace blower 140. When the shut-off valve 112 is fully closed, the nitrogen gas is stopped from being fed. The space between the oxygen quick cut valve 113 and the cut valve 112 is sealed by nitrogen, so that not only can the leakage of oxygen be prevented, but also accidents caused by the countercurrent of the unit can be prevented. In addition, when the blast furnace blower 140 is emergency stopped or surge occurs, the nitrogen quick cut valve 161 is opened, high pressure nitrogen is charged, oxygen inside the exhaust pipe is prevented from entering at the same time, and the function of a protection system is achieved.
In another alternative example of the present invention, the shut-off valve 112 may also be a manual shut-off valve, desirably upon receipt of a shut-off valve 112.
The pre-blast-furnace oxygen enrichment device 100 provided by the invention can increase the oxygen content in blast air, so as to increase the blast air quantity and the combustion temperature, and finally improve the production efficiency. The oxygen-enriched device 100 in front of the blast furnace provided by the invention can replace metallurgical coke with low-cost power pulverized coal to the maximum extent, is a key technology for improving the flow vitality and competitiveness of a blast furnace and a converter, and can effectively prolong the service life of the blast furnace, thereby obtaining good economic benefit. When oxygen-enriched blast is carried out, the amount of air required for burning the unit carbon amount and the generated gas amount in front of the tuyere are reduced, so that the smelting strength can be improved, and the utilization coefficient of the blast furnace can be improved under the condition that the coke ratio is not changed greatly. According to the oxygen enrichment 1%, the yield can be improved by 4.76% after the oxygen enrichment of the blast furnace theoretically.
The detailed explanation of the embodiments described above is only for the purpose of explaining the present invention so as to enable a better understanding of the present invention, but the descriptions should not be construed as limiting the present invention in any way, and in particular, the respective features described in the different embodiments may be arbitrarily combined with each other to constitute other embodiments, and these features should be understood as being applicable to any one embodiment, except for the explicitly contrary descriptions.
Claims (10)
1. The oxygen enrichment device in front of the blast furnace is characterized by comprising an oxygen conveying pipeline, an oxygen mixer, an oxygen content detector and a blast furnace blower which are sequentially connected in series, wherein a flow regulating valve and a cut-off valve which are sequentially arranged along the direction of oxygen conveying are arranged on the oxygen conveying pipeline, an air conveying pipeline is communicated with the oxygen mixer, the oxygen content detector and the flow regulating valve are electrically connected with the control unit, and the oxygen content detector and the flow regulating valve are interlocked through the control unit; the oxygen concentration detector detects the oxygen concentration in the mixed gas before entering the blast furnace blower, and the opening of the flow regulating valve is timely adjusted according to the oxygen concentration, so that the oxygen concentration in the mixed gas before entering the blast furnace blower is always within a preset range.
2. The pre-blast furnace oxygen-enriching device according to claim 1, wherein an oxygen quick-cutting valve is further installed between the flow regulating valve and the cut-off valve, and the oxygen quick-cutting valve and the blast furnace blower are electrically connected with the control unit.
3. The pre-blast furnace oxygen-enriched device as set forth in claim 2, further comprising a nitrogen gas delivery pipe, wherein the nitrogen gas delivery pipe is communicated with the oxygen gas delivery pipe and is disposed between the shut-off valve and the oxygen fast-cut valve, the nitrogen gas delivery pipe is provided with a nitrogen gas fast-cut valve, and the nitrogen gas fast-cut valve is electrically connected with the control unit.
4. A pre-blast furnace oxygen enrichment device as set forth in claim 3, wherein the gas pressure in said nitrogen delivery conduit is greater than the gas pressure in said oxygen delivery conduit.
5. The pre-blast furnace oxygen-enriching apparatus according to claim 4, wherein the gas pressure in said nitrogen delivery pipe is 0.8MPa.
6. The pre-blast furnace oxygen-enriching apparatus according to claim 3, wherein a flame arrester is further arranged on the oxygen transmission pipeline, and the flame arrester is arranged between the nitrogen transmission pipeline and the oxygen quick-cut valve.
7. The oxygen-enriched device in front of the blast furnace machine according to claim 2, wherein one end of the oxygen transmission pipeline is connected with the oxygen mixer, the other end of the oxygen transmission pipeline is connected with an oxygen compressor room, a filter is further arranged on the oxygen transmission pipeline, and the filter is arranged between the flow regulating valve and the oxygen compressor room.
8. The oxygen enrichment device before a blast furnace machine according to claim 7, wherein an oxygen cut-off valve is further installed on the oxygen transmission pipeline, the oxygen cut-off valve is arranged between the oxygen compressor room and the filter, and the oxygen cut-off valve is electrically connected with the control unit.
9. The pre-blast furnace oxygen enrichment device as set forth in claim 1, wherein the oxygen delivery pipeline is further provided with a pressure testing assembly and an oxygen flowmeter, the pressure testing assembly comprises a pressure transmitter and a pressure gauge, and the pressure gauge and the oxygen flowmeter are electrically connected with the control unit.
10. The pre-blast furnace oxygen enrichment device as set forth in claim 1, wherein the shut-off valve is an electric shut-off valve, and wherein the electric shut-off valve is electrically connected to the control unit.
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| CN111607672A (en) * | 2019-02-23 | 2020-09-01 | 安阳市新普钢铁有限公司 | Oxygen enrichment process in front of blast furnace |
| CN111117685B (en) * | 2019-12-31 | 2021-04-02 | 上海轻叶能源股份有限公司 | Oxygen-enriched air blast management system in front of catalytic cracker |
| CN111470477B (en) * | 2020-04-07 | 2021-01-01 | 上海轻叶能源股份有限公司 | Sulfur recovery Claus furnace oxygen-enriched air blast management system and method |
| CN112555886A (en) * | 2020-12-07 | 2021-03-26 | 青岛大学 | Low-pressure oxygen mixing combustion-supporting device of burner |
| CN112797440A (en) * | 2021-01-15 | 2021-05-14 | 山东京博石油化工有限公司 | Oxygen-enriched combustion control system of heating furnace and control method thereof |
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| CN205893299U (en) * | 2016-08-23 | 2017-01-18 | 朱昌云 | Oxygen boosting complete sets before energy -efficient blast furnace machine |
| CN106755678A (en) * | 2016-12-14 | 2017-05-31 | 四川德胜集团钒钛有限公司 | Oxygen enrichment system before a kind of blast furnace machine |
| CN107354254A (en) * | 2017-07-31 | 2017-11-17 | 中冶华天南京电气工程技术有限公司 | Oxygen-enriched system and the control method of oxygen enrichment percentage before a kind of blast furnace machine |
| CN207918890U (en) * | 2017-12-27 | 2018-09-28 | 北京京诚科林环保科技有限公司 | Oxygen-enriching device before a kind of blast furnace machine |
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