CN116479196A - Combined high-efficiency energy-saving environment-friendly blast furnace damping-down gas recovery device - Google Patents
Combined high-efficiency energy-saving environment-friendly blast furnace damping-down gas recovery device Download PDFInfo
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- CN116479196A CN116479196A CN202310498976.5A CN202310498976A CN116479196A CN 116479196 A CN116479196 A CN 116479196A CN 202310498976 A CN202310498976 A CN 202310498976A CN 116479196 A CN116479196 A CN 116479196A
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- 238000011084 recovery Methods 0.000 title claims abstract description 86
- 238000013016 damping Methods 0.000 claims abstract description 56
- 239000000428 dust Substances 0.000 claims abstract description 21
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 238000010248 power generation Methods 0.000 claims abstract description 17
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 230000005484 gravity Effects 0.000 claims abstract description 10
- 238000004064 recycling Methods 0.000 claims abstract description 10
- 239000004744 fabric Substances 0.000 claims abstract description 6
- 239000000872 buffer Substances 0.000 claims description 38
- 230000017525 heat dissipation Effects 0.000 claims description 7
- 230000002265 prevention Effects 0.000 claims description 6
- 239000012464 large buffer Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 14
- 239000003034 coal gas Substances 0.000 abstract description 4
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 266
- 230000005540 biological transmission Effects 0.000 description 9
- 230000009467 reduction Effects 0.000 description 7
- 238000005070 sampling Methods 0.000 description 6
- 239000000571 coke Substances 0.000 description 5
- 238000010408 sweeping Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 230000000740 bleeding effect Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000000137 annealing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- -1 steam Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/06—Making pig-iron in the blast furnace using top gas in the blast furnace process
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/24—Test rods or other checking devices
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- Chemical & Material Sciences (AREA)
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- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The application relates to a combined high-efficiency energy-saving environment-friendly blast furnace damping-down gas recovery device, which comprises an RGR damping-down gas recovery complete device, wherein a high-pressure injection pipe is arranged on the RGR damping-down gas recovery complete device; the air inlet end of the high-pressure gas pipe is communicated with a gravity dust remover, a cloth bag dust remover and the like, and the air outlet end of the high-pressure gas pipe is communicated with an RGR damping down coal gas recovery complete device; the low-pressure gas pipe network is removed, the low-pressure gas pipe network is arranged at the gas outlet end of the RGR damping-down gas recovery complete set device, and the low-pressure gas pipe network is communicated with the RGR damping-down gas recovery complete set device; the power generation device is respectively communicated with the high-pressure gas pipe and the low-pressure gas pipe network, and is connected in parallel with the RGR damping-down gas recovery complete device; the pressure regulating valve group is respectively communicated with the high-pressure gas pipe and the low-pressure gas pipe network, and is connected with the RGR damping-down gas recovery complete device in parallel. The recycling device has the advantages that all raw gas is recycled as much as possible, so that the recycling effect of the recycling device on the raw gas is improved.
Description
Technical Field
The application relates to the technical field of blast furnace ironmaking, in particular to a combined high-efficiency energy-saving environment-friendly blast furnace damping down gas recovery device.
Background
In the metallurgical industry, the energy consumption and the pollution generated by the blast furnace ironmaking occupy a great proportion in the whole steel process, and obviously, the ironmaking is an important promotion object of energy-saving and emission-reducing measures. Blast furnace ironmaking is still the main method of current modern ironmaking, one of the byproducts of blast furnace production is blast furnace gas, the yield is huge, and natural blast furnace tank pressure-equalizing gas and damping down and diffusing gas become the focus of attention of various iron and steel enterprises.
When the wind reduction is started in the traditional damping down process, the gas is directly purified by a dry gas dust removal system and then conveyed into a clean gas pipe network by utilizing the advantage of higher pressure of the top gas. When the pressure of the top gas is lower than 30-40 Kpa, the dry gas dust removal system has a very low processing speed, and when the pressure of the top gas is close to the pressure of a gas pipe network, the gas cannot be conveyed to the gas pipe network. Therefore, when the furnace top pressure is reduced to about 20Kpa, a furnace top bleeding valve is generally opened to bleed the raw gas into the atmosphere. The raw gas contains a large amount of dust, the appearance is shown as a large amount of yellow brown smoke dust, and huge noise is generated, so that the raw gas does not meet the environmental protection requirement and energy waste is caused.
In the above-mentioned related art, there is a defect that a part of raw gas cannot be recovered, and thus the recovery effect of the recovery device on the raw gas is reduced.
Disclosure of Invention
In order to recover all raw gas as much as possible, thereby improving the recovery effect of the recovery device on the raw gas, the application provides a combined high-efficiency energy-saving environment-friendly blast furnace damping down gas recovery device.
The application provides a combination type blast furnace damping down gas recovery device with high efficiency, energy conservation and environmental protection, which adopts the following technical scheme:
a kind of combined high-efficient energy-concerving and environment-protective blast furnace damping down coal gas recovery unit, including:
the RGR damping-down gas recovery complete device is provided with a high-pressure injection pipe, and a first valve group and an injection valve are arranged between the high-pressure injection pipe and the RGR damping-down gas recovery complete device;
the air inlet end of the high-pressure gas pipe is communicated with a gravity dust remover, a cloth bag dust remover and the like, the air outlet end of the high-pressure gas pipe is communicated with the RGR damping-down gas recovery complete device, and a second valve group is arranged between the high-pressure gas pipe and the RGR damping-down gas recovery complete device;
the low-pressure gas removing pipe network is arranged at the gas outlet end of the RGR damping down gas recovery complete set, and is communicated with the RGR damping down gas recovery complete set, and a third valve group is arranged between the low-pressure gas removing pipe network and the RGR damping down gas recovery complete set;
the power generation device is respectively communicated with the high-pressure gas pipe and the low-pressure gas removal pipe network, and is connected in parallel with the RGR damping-down gas recovery complete device;
the pressure regulating valve group is respectively communicated with the high-pressure gas pipe and the low-pressure gas removing pipe network, and is connected with the RGR damping down gas recovery complete device in parallel.
Through adopting above-mentioned technical scheme, during normal production of blast furnace, first valves, second valves, third valves, injection valve and air-vent valve group all are in the closed condition, and after the blast furnace raw gas passed through gravity dust remover and gas sack cleaner, through the power generation facility electricity generation of high-pressure gas pipe entering, the gas after the electricity generation enters into the low pressure gas pipe network.
When the blast furnace is in a damping down state, the pressure of the top of the blast furnace is reduced along with the damping down operation of the blast furnace, and when the blast furnace is reduced to a state that the power generation device cannot be operated to generate power, the valve of the pressure regulating valve group is opened, the air inlet valve and the air outlet valve in the power generation device are closed, and raw gas enters the low-pressure gas pipe network after being regulated by the pressure regulating valve group.
When the furnace top pressure is reduced during the blast furnace damping down period, the first valve group, the second valve group, the third valve group and the injection valve are opened, and the pressure regulating valve group is closed to enable blast furnace gas to be sent to a low-pressure gas pipe network through the injector. Raw gas generated by the blast furnace enters a high-pressure gas pipe after passing through a gravity dust collector and a gas bag dust collector, and then sequentially enters a low-pressure gas pipe network through a second valve group, an RGR damping-down gas recycling complete device and a third valve group.
Therefore, no matter what state the blast furnace is in, the device can recover the raw gas in the blast furnace, thereby reducing the waste of energy sources and enhancing the protection to the environment, and further realizing the recovery of all the raw gas as much as possible on the whole, so as to improve the recovery effect of the recovery device on the raw gas.
Preferably, the first valve group, the second valve group and the third valve group have the same mechanism, the first valve group comprises a first butterfly valve and a first blind plate valve, and the first butterfly valve and the first blind plate valve are connected in series;
an exhaust valve group is arranged between the RGR damping-down gas recovery complete device and the high-pressure gas pipe, and the exhaust valve group and the first valve group have the same structure.
By adopting the technical scheme, when the first valve bank, the second valve bank or the third valve bank is required to be in a closed state, the first butterfly valve is started at first, so that the pressure and the flow in a pipeline are reduced, and a worker can save labor relatively when closing the first blind plate valve, so that the worker can operate the first valve bank conveniently; in addition, less unqualified raw gas can be generated in the early stage of blast furnace air supply, and the raw gas cannot be recycled, so that after the unqualified raw gas is filtered by the gravity dust remover and the cloth bag dust remover, a relief valve is opened, the unqualified raw gas is discharged to the atmosphere after being filtered, the raw gas at the moment basically cannot damage the environment after being filtered, and meanwhile, the unqualified raw gas is discharged, so that the quality of the recycled raw gas is improved.
Preferably, a pipe network fluctuation prevention device is arranged between the RGR damping down gas recovery complete device and the low-pressure gas removing pipe network.
Through adopting above-mentioned technical scheme, when this device was in the transmission raw coke oven gas, prevent that the pipeline network is undulant the device can guarantee the stability of pipeline to make the transmission process of raw coke oven gas more stable and safe.
Preferably, an anti-pipe network fluctuation device is arranged between the RGR damping down gas recovery complete device and the low-pressure gas pipe network, the anti-pipe network fluctuation device comprises a pressure reducing pipe, and a plurality of small-to-large buffer cavities and diversion trenches are sequentially formed in the pressure reducing pipe;
the guide grooves are arranged on the outer sides of the buffer cavities, every two adjacent buffer cavities are communicated through one guide groove, each guide groove is arc-shaped, each guide groove is used for guiding gas to one point in the space of each buffer cavity, and connecting pieces are arranged in each guide groove and are respectively connected with the groove walls of the corresponding guide grooves and the outer side walls of the corresponding buffer cavities.
The air inlet end of the guide groove with the smallest relative value is communicated with the air outlet end of the RGR damping down gas recovery complete device, and the buffer cavity with the largest relative value is communicated with the air inlet end of the low-pressure gas pipe network.
By adopting the technical scheme, because the pressure difference exists between the high-pressure gas pipe and the low-pressure gas pipe, the pipeline between the high-pressure gas pipe and the low-pressure gas pipe is easy to generate fluctuation when the gas is transmitted, and the diversion trench and the buffer cavity are matched, so that a structure similar to a Tesla valve is formed, and the crude gas is guided by the diversion trench, so that the crude gas collides with itself in the transmission process, the energy of the crude gas is reduced, and the flow speed of the crude gas is reduced; in addition, the space of the plurality of diversion trenches and the buffer cavity is gradually increased, so that the pressure of the gas entering the pressure reducing pipe from the RGR damping-down gas recovery complete device is reduced; the reduction of the flow speed and the reduction of the pressure of the raw gas can offset a certain pressure fluctuation effect, so that the stability of raw gas conveying is improved.
Preferably, the arrangement direction of the air outlet end of the diversion trench is perpendicular to the axis of the depressurization pipe.
Through adopting above-mentioned technical scheme, when raw gas flows from the guiding gutter end of giving vent to anger, because the direction of laying of guiding gutter end of giving vent to anger is perpendicular to the axis of reducing the pressure pipe, consequently raw gas can take place the normal collision, and the energy that the normal collision lost is the biggest, therefore, the effect of reducing the flow velocity of raw gas reaches the highest.
Preferably, the arrangement direction of the air outlet end of the flow guide groove forms an included angle with the axis of the pressure reducing pipe, and the arrangement direction of the air outlet end of the flow guide groove is inclined along the direction close to the air inlet end of the flow guide groove.
By adopting the technical scheme, when the raw gas flows out from the gas outlet end of the diversion trench, the raw gas collides, so that the flow speed of the raw gas is reduced; because the direction of laying of guiding gutter gas outlet end forms the contained angle with the axis of reducing the pressure pipe, consequently, the gas after the buffer intracavity collides can directly get into next guiding gutter along original flow direction to avoid because the velocity of flow of raw gas is too slow, the condition that leads to raw gas to pile up in the buffer chamber takes place, and then improved the transmission efficiency of raw gas.
Preferably, a guide plate is arranged on the cavity wall of the buffer cavity, and the guide plate is opposite to the air outlet end of the RGR damping-down gas recovery complete device.
By adopting the technical scheme, when raw gas flows into the buffer cavity, the guide plate can directly guide the decelerated raw gas to the air inlet of the next guide groove, so that the transmission efficiency of the raw gas is further improved.
Preferably, the groove diameter of the flow guide groove is gradually increased from the air inlet end to the air outlet end, the connecting piece is a plurality of flow limiting plates, a plurality of air inlet holes are formed in the end faces, close to the air inlet end of the flow guide groove, of the flow limiting plates, a plurality of air outlet holes are formed in the other ends of the flow limiting plates, and at least more than two air outlet holes are communicated with one air inlet hole.
Through adopting above-mentioned technical scheme, when raw gas flows to the guiding gutter, the setting of inlet port and venthole on the current-limiting board for the gaseous collision that also can take place from adjacent venthole, thereby further reduce the energy of raw gas and reduced the flow rate of raw gas, and then further improved the stability that raw gas carried.
Preferably, the aperture of at least two of the air outlet holes is equal to the aperture of one of the air inlet holes.
By adopting the technical scheme, the unit air inflow and the unit air outflow are basically the same, so that the air flowing out of the air outlet is relatively more stable; in addition, the apertures of the air outlets are the same, so that the energy lost when the gas from the adjacent air outlets collides is the same as much as possible, the flow velocity of the raw gas in each part of the diversion trench is the same as much as possible, and the stability of the gas in flowing is further improved.
Preferably, a heat dissipation member is arranged between the diversion trench and the buffer cavity and on the peripheral wall of the depressurization pipe.
By adopting the technical scheme, the raw coke oven gas is generated from the blast furnace, and the temperature of the blast furnace is relatively high, so that the raw coke oven gas also has relatively high temperature at normal temperature after being filtered, and the raw coke oven gas can be cooled to a certain degree through the heat dissipation piece, so that the subsequent recycling is facilitated; in addition, the raw gas is subjected to heat dissipation and temperature reduction treatment, so that the molecular motion activity of the raw gas is reduced, the energy and the flow rate of the raw gas are further reduced, and the conveying stability of the raw gas is further improved.
In summary, the present application includes at least one of the following beneficial technical effects:
1. no matter what state the blast furnace is in, the raw gas in the blast furnace can be recovered through the device, so that the waste of energy sources is reduced, the protection of the environment is enhanced, and further, the recovery of all the raw gas is realized as much as possible on the whole, and the recovery effect of the recovery device on the raw gas is improved;
2. the arrangement of the bleeding valve enables unqualified and filtered raw gas to be discharged into the atmosphere, the raw gas is filtered at the moment, the environment is basically not damaged, meanwhile, the unqualified gas is discharged, and therefore the quality of the recovered raw gas is improved;
3. the diversion trench and the buffer cavity in the depressurization pipe are matched to form a structure similar to a Tesla valve, so that raw gas collides in the transmission process, the energy of the raw gas is reduced, and the flow speed of the raw gas is reduced; in addition, the spaces of the diversion trenches and the buffer cavities are gradually increased, so that the pressure of the gas in the pipeline of the depressurization pipe is reduced; thereby reducing the pressure fluctuation effect of the pipeline on the whole and improving the stability of raw gas transportation;
4. the air inlet holes and the air outlet holes on the flow limiting plate are arranged, so that gas coming out of the adjacent air outlet holes can collide, the energy of raw gas is further reduced, the flow speed of the raw gas is reduced, and the conveying stability of the raw gas is further improved;
5. the aperture of the two air outlet holes is equal to the aperture of one air inlet hole, so that the unit air inflow and the unit air outlet amount are basically the same, and the air flowing out of the air outlet holes is relatively more stable; the apertures of the air outlets are the same, so that the energy lost when the gas from the adjacent air outlets collides is the same as much as possible, and the stability of the gas during flowing is further improved.
Drawings
Fig. 1 is a schematic overall structure of embodiment 1 of the present application.
Fig. 2 is a schematic structural diagram of the pipe network fluctuation preventing device in embodiment 2 of the present application.
Fig. 3 is a schematic structural view of a buffer chamber in embodiment 2 of the present application.
Fig. 4 is a schematic structural view of a connector in embodiment 2 of the present application.
Fig. 5 is a schematic view of the structure of the air outlet in embodiment 2 of the present application.
Fig. 6 is a schematic diagram showing connection between the air inlet and the air outlet in embodiment 2 of the present application.
Fig. 7 is a schematic overall structure of embodiment 3 of the present application.
In the figure: 1. RGR damping down gas recovery complete equipment; 11. a high pressure ejector tube; 12. a first valve block; 121. a first butterfly valve; 122. a first blind plate valve; 13. an ejector valve; 2. a high pressure gas pipe; 21. a second valve block; 211. a second butterfly valve; 212. a second blind plate valve; 22. a third valve group; 221. a third butterfly valve; 222. a third blind plate valve; 23. an exhaust valve group; 24. a fourth butterfly valve; 25. a bleeding valve group; 26. purging the sampling valve group; 27. a sweeping medium flow and pressure control valve group; 28. a pressure gauge; 3. removing a low-pressure gas pipe network; 4. a power generation device; 5. a pressure regulating valve group; 6. a pipe network fluctuation prevention device; 61. a pressure reducing tube; 611. a connecting cavity; 612. a buffer chamber; 613. a diversion trench; 62. a connecting piece; 621. an air inlet hole; 622. an air outlet hole; 63. a deflector; 7. and a heat sink.
Detailed Description
The present application is described in further detail below in conjunction with figures 1-7.
Example 1
The embodiment of the application discloses a combined type efficient energy-saving environment-friendly blast furnace damping down gas recovery device. Referring to fig. 1, a combined high-efficiency energy-saving environment-friendly blast furnace damping down gas recovery device comprises an RGR damping down gas recovery complete device 1, a high-pressure gas pipe 2, a low-pressure gas pipe network 3, a power generation device 4 and a pressure regulating valve group 5.
An ejector (not shown in the figure) is arranged in the RGR damping-down gas recovery complete device 1, a high-pressure ejector pipe 11 is communicated with the ejector, one end of the high-pressure ejector pipe 11 is connected with a gas source capable of generating high-pressure ejector mediums, and generally clean gases such as steam, nitrogen, gas and the like can be selected as the high-pressure ejector mediums.
The air inlet end of the high-pressure gas pipe 2 is communicated with a gravity dust collector, a cloth bag dust collector (not shown) and other filtering devices, and the air outlet end of the high-pressure gas pipe 2 is communicated with the RGR damping down coal gas recovery complete device 1. And the low-pressure gas pipe network 3 is communicated with the gas outlet end of the RGR damping down gas recovery complete device 1.
The power generation device 4 is a blast furnace gas residual pressure power generation device (TRT) or a blast furnace power recovery turbine unit (BPRT), which are both devices that generate power using blast furnace gas, and one of the devices may be arbitrarily selected as the power generation device in the present device. The power generation device 4 is respectively communicated with the high-pressure gas pipe 2 and the low-pressure gas pipe network 3, and the power generation device 4 is connected with the RGR damping down gas recovery complete device 1 in parallel.
The pressure regulating valve group 5 is respectively communicated with the high-pressure gas pipe 2 and the low-pressure gas pipe network 3, and likewise, the pressure regulating valve group 5 is connected with the RGR damping down gas recovery complete device 1 in parallel.
Wherein, a first valve group 12 and an injection valve 13 are arranged between the high-pressure injection pipe 11 and the RGR damping down gas recovery complete device 1.
A third valve group 22 is arranged between the low-pressure gas pipe network 3 and the RGR damping down gas recovery complete device 1.
A second valve group 21 is arranged between the high-pressure gas pipe 2 and the RGR damping down gas recovery complete device 1.
When the blast furnace is in normal production, the first valve bank 12, the second valve bank 21, the third valve bank 22, the injection valve 13 and the pressure regulating valve bank 5 are all in a closed state, after raw blast furnace gas is dedusted by a gravity deduster and a gas bag deduster, the raw blast furnace gas enters the power generation device 4 through the high-pressure gas pipe 2 to generate electricity and consume kinetic energy, and the gas with reduced pressure enters a low-pressure gas pipe network.
When the blast furnace is in a damping down state, the pressure of the top of the blast furnace is reduced along with the damping down operation of the blast furnace, and when the pressure is reduced to a level at which the power generation device 4 cannot be driven to generate power, the valve of the pressure regulating valve group 5 is opened, the air inlet valve and the air outlet valve in the power generation device 4 are closed, and raw gas enters the low-pressure gas pipe network after being regulated by the pressure regulating valve group 5.
When the furnace top pressure is reduced to the point that the blast furnace cannot pass through the pressure regulating valve group 5 during the damping down period of the blast furnace, the first valve group 12, the second valve group 21, the third valve group 22 and the injection valve 13 are opened, and the pressure regulating valve group 5 is closed to enable blast furnace gas to be sent to a low-pressure gas pipe network through the injector. Raw gas generated by the blast furnace enters a high-pressure gas pipe 2 after passing through a gravity dust remover and a gas bag dust remover, and then sequentially enters a low-pressure gas pipe network through a second valve group 21, an RGR damping-down gas recycling complete device 1 and a third valve group 22.
Therefore, no matter what state the blast furnace is in, the device can recover the raw gas in the blast furnace, thereby reducing the waste of energy sources and enhancing the protection to the environment, and further realizing the recovery of all the raw gas as much as possible on the whole, so as to improve the recovery effect of the recovery device on the raw gas.
The first valve block 12 includes a first butterfly valve 121 and a first blind plate valve 122. The first butterfly valve 121 in this embodiment is a pneumatic butterfly valve, and the first butterfly valve 121 does not perform a complete blocking function, and the first blind plate valve 122 is required to completely block gas.
When the first valve block 12 is required to be in the closed state, the first butterfly valve 121 is first activated, thereby reducing the pressure and flow in the pipeline, so that the operator is relatively labor-saving when closing the first blind plate valve 122, and the operator can conveniently operate the first valve block 12.
The first valve block 12, the second valve block 21 and the third valve block 22 have the same structure, the second valve block 21 includes a second butterfly valve 211 and a second blind plate valve 212, and the third valve block 22 includes a third butterfly valve 221 and a third blind plate valve 222.
An exhaust valve group 23 is further arranged between the RGR damping down gas recovery complete device 1 and the high-pressure gas pipe 2, and the exhaust valve group 23 has the same structure as the first valve group 12.
The air supply earlier stage of the blast furnace can produce less unqualified raw gas, and the raw gas cannot be recycled, so that after the unqualified raw gas is filtered by the gravity dust remover and the cloth bag dust remover, the exhaust valve group 23 is opened, the unqualified raw gas is discharged to the atmosphere after being filtered, and the raw gas at the moment basically cannot damage the environment after being filtered, and meanwhile, the unqualified raw gas is discharged, so that the quality of the recycled raw gas is improved.
A fourth butterfly valve 24 is further arranged between the exhaust valve group 23 and the RGR damping down gas recovery complete device 1, and the pressure and the flow in the system can be further regulated through the fourth butterfly valve 24.
The two sides of the first blind plate valve 122, the two sides of the second blind plate valve 212 and the two sides of the third blind plate valve 222 are respectively provided with a diffusion valve group 25, and each diffusion valve group 25 is provided with two valves, one of which is used as a standby.
A purge sampling valve set 26 is further arranged on each diffusion valve set 25, and two valves are arranged on each purge sampling valve set 26. In an actual scene, a worker generally checks raw gas at all positions on the system, and then judges whether a damaged position exists in the system according to the quality of the raw gas. The purging and sampling valve set 26 is convenient for staff to sample raw gas at all positions in the system.
And a sweeping medium flow and pressure control valve group 27 is further arranged between each diffusing valve group 25 and the first blind plate valve 122 for quality inspection, and between the second blind plate valve 212 and the third blind plate valve 222, and each sweeping medium flow and pressure control valve group 27 comprises two sweeping medium flow and pressure control valves in the same way. When a worker samples raw gas at all positions in the system, the gas flow and the pressure at all positions in the system are uncertain, and the sampling work of the worker is not easy to happen due to the fact that the flow and the pressure are too small or too large, so that the flow and the pressure at all positions are controlled through the sweeping medium flow and pressure control valve bank 27, and the sampling work of the worker is facilitated.
In addition, a pressure gauge 28 is arranged between the fourth butterfly valve 24 and the RGR damping down gas recovery complete set 1 and between the high-pressure injection pipe 11 and the first butterfly valve 121, so that a worker can monitor the pressure in two main pipelines in the system.
In the above system, a pipe network fluctuation prevention device 6 is arranged between the second valve group 21 and the low pressure gas pipe network 3.
In this embodiment, the pipe network fluctuation preventing device 6 may be a pipe pressure control device, the pressure control device includes a pressure control valve installed on a gas pipe, and a mechanical low-pressure protection device and a mechanical high-pressure protection device are arranged on the gas pipe. The pipeline pressure control device can quickly and conveniently adjust the conditions of larger gas medium load change and larger gas pressure fluctuation in the gas pipeline of the vertical annealing furnace, can quickly supplement pressure through a mechanical pressure reducing valve at low pressure, can quickly discharge pressure through a water sealing device at high pressure, and can stabilize output pressure through a junction and an automatic pressure excitation control valve. Thereby ensuring stable production and equipment safety.
Example 2
Referring to fig. 2, embodiment 2 is different from embodiment 1 in that the diameter of the low-pressure gas removal pipe network 3 is larger than that of the RGR damping-down gas recovery plant 1, and the pipe network fluctuation prevention device 6 is horn-shaped and is disposed between the RGR damping-down gas recovery plant 1 and the low-pressure gas removal pipe network 3.
Referring to fig. 3, the pipe network fluctuation prevention device 6 includes a pressure reducing pipe 61, in this embodiment, the pressure reducing pipe 61 is horn-shaped, a plurality of partitions and connecting blocks are sequentially disposed in the pressure reducing pipe 61 along the axis direction thereof, and the plurality of partitions and connecting blocks form a plurality of small-to-large buffer chambers 612 and diversion trenches 613 in the pressure reducing pipe 61. In this embodiment, 3 buffer chambers 612 and 3 diversion trenches 613 are respectively provided. The inlet end of the guide groove 613 with the smallest relative size is communicated with the outlet end of the RGR damping down gas recovery complete device 1, and the buffer cavity 612 with the largest relative size is communicated with the inlet end of the low pressure gas pipeline network 3.
The buffer cavities 612 are also in a column shape and are coaxially distributed with the depressurization pipe 61, the diversion trenches 613 are in one-to-one correspondence with the buffer cavities 612, the diversion trenches 613 are positioned at the outer sides of the buffer cavities 612, every two adjacent buffer cavities 612 are communicated through one diversion trench 613, the cross section of each diversion trench 613 is annular, and the walls of each diversion trench 613 are arc-shaped. The guide groove 613 is internally provided with a connecting piece 62, and the connecting piece 62 is respectively connected with the pressure reducing pipe 61 and the connecting block.
Because there is pressure difference between the high-pressure gas pipe 2 and the low-pressure gas pipe network 3, the pipeline between the high-pressure gas pipe 2 and the low-pressure gas pipe network 3 is easy to generate fluctuation when gas is transmitted, and the diversion trench 613 and the buffer cavity 612 are matched, so that the speed and the pressure of raw gas during transmission can be reduced. The structure can enable raw gas to be transmitted into the low-pressure gas pipe network 3 through setting the number of the buffer cavities 612 and the diversion trenches 613, the radian of the diversion trenches 613 and the length of the depressurization pipe 61.
The raw gas is guided by the diversion trenches 613, so that the raw gas collides with the buffer cavity 612, the energy of the raw gas is reduced, and the flow speed of the raw gas is reduced; in addition, the diameters of the three diversion trenches 613 and the three buffer chambers 612 are gradually increased, so that the space is gradually increased, and therefore, the pressure of the gas entering the pressure reducing pipe 61 from the RGR damping down gas recovery complete set 1 is reduced; the reduction of the flow speed and the reduction of the pressure of the raw gas can offset a certain pressure fluctuation effect, so that the stability of raw gas conveying is improved.
Moreover, the connection part of the depressurization pipe 61 and the gas outlet end of the RGR damping down gas recovery complete device 1 is provided with a connection cavity 611, the diameter of the connection cavity 611 is larger than that of the gas outlet end of the RGR damping down gas recovery complete device 1, and the space is suddenly increased, so that a certain buffering effect can be played on the gas flow.
Referring to fig. 4 and 5, the number of the connecting pieces 62 is six in the present embodiment, the number of the flow-limiting plates in each flow-guiding groove 613 is two in the present embodiment, the end face of the flow-limiting plate, which is close to the air inlet end of the flow-guiding groove 613, is provided with a plurality of air inlet holes 621, the other end of the flow-limiting plate is provided with a plurality of air outlet holes 622, and at least more than two air outlet holes 622 are all communicated with one air inlet hole 621 (refer to fig. 6).
When raw gas flows to the diversion trench 613, the air inlet hole 621 and the air outlet hole 622 on the flow limiting plate are arranged, so that the gas coming out of the adjacent air outlet hole 622 can collide, the energy of the raw gas is further reduced, the flow speed of the raw gas is reduced, and the conveying stability of the raw gas is further improved.
Meanwhile, referring to fig. 6, the apertures of the two air outlet holes 622 in the present embodiment are equal to the aperture of one air inlet hole 621, which makes the unit air inflow and the unit air outflow substantially the same, so that the flow of the air from the air outlet holes 622 is relatively smoother; in addition, the apertures of the air outlet holes 622 are the same, so that the energy lost when the gas from the adjacent air outlet holes 622 collides is the same as much as possible, the flow velocity of the raw gas in the diversion trench 613 is the same as much as possible, and the stability of the gas flowing is further improved.
In addition, referring to fig. 3, the arrangement direction of the air outlet end of the diversion trench 613 is perpendicular to the axis of the depressurization pipe 61. When raw gas flows out from the gas outlet end of the diversion trench 613, the arrangement direction of the gas outlet end of the diversion trench 613 is perpendicular to the axis of the depressurization pipe 61, so that the raw gas can collide positively, the energy lost by the collision is maximum, and the effect of reducing the flow speed of the raw gas is highest.
Next, the heat sink 7 is provided on the outer peripheral wall of the pressure reducing pipe 61. The heat sink 7 may be a fin, a condenser tube, etc., and the heat sink 7 is preferably a condenser tube in this embodiment. In addition, the connection block and the flow-limiting plate between the flow-guiding groove 613 and the buffer cavity 612 not only play a role in connecting the components on the inner side and the outer side, but also play a role in heat conduction, and the connection block and the flow-limiting plate guide heat in the buffer cavity 612 to the heat dissipation piece 7.
The raw gas can be cooled to a certain degree through the heat dissipation piece 7, so that the subsequent recycling is facilitated; in addition, the raw gas is subjected to heat dissipation and temperature reduction treatment, so that the molecular motion activity of the raw gas is reduced, the energy and the flow rate of the raw gas are further reduced, and the conveying stability of the raw gas is further improved.
Example 3
Referring to fig. 7, the difference between this embodiment and embodiment 1 is that the air outlet end of the flow guide groove 613 forms an included angle with the axis of the pressure reducing tube 61, the right angle is in embodiment 2, the acute angle is in this embodiment, and the air outlet end of the flow guide groove 613 is inclined in a direction away from the air inlet end.
The cavity wall of the buffer cavity 612 is provided with a guide plate 63, and the guide plate 63 is opposite to the air outlet end of the RGR damping down coal gas recovery complete device 1.
When raw gas flows out from the gas outlet end of the diversion trench 613, the raw gas collides, so that the flowing speed of the raw gas is reduced; because the arrangement direction of the air outlet end of the diversion trench 613 and the axis of the depressurization pipe 61 form an acute angle, the gas after collision in the buffer cavity 612 can directly enter the next diversion trench 613 along the original flow direction, so that the situation that the raw gas is accumulated in the buffer cavity 612 due to too slow flow speed of the raw gas is avoided, and the transmission efficiency of the raw gas is further improved; the guide plate 63 can guide the decelerated raw gas to the gas inlet of the next guide groove 613, thereby further improving the transmission efficiency of the raw gas.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (10)
1. The utility model provides a combination formula high-efficient energy-concerving and environment-protective blast furnace damping down gas recovery unit which characterized in that includes:
the RGR damping-down gas recovery complete device (1), wherein a high-pressure injection pipe (11) is arranged on the RGR damping-down gas recovery complete device (1), and a first valve group (12) and an injection valve (13) are arranged between the high-pressure injection pipe (11) and the RGR damping-down gas recovery complete device (1);
the high-pressure gas pipe (2), the air inlet end of the high-pressure gas pipe (2) is communicated with a gravity dust remover, a cloth bag dust remover and the like, the air outlet end of the high-pressure gas pipe (2) is communicated with the RGR damping-down gas recovery complete device (1), and a second valve group (21) is arranged between the high-pressure gas pipe (2) and the RGR damping-down gas recovery complete device (1);
the low-pressure gas removing pipe network (3), the low-pressure gas removing pipe network (3) is arranged at the gas outlet end of the RGR damping down gas recycling complete device (1), the low-pressure gas removing pipe network (3) is communicated with the RGR damping down gas recycling complete device (1), and a third valve group (22) is arranged between the low-pressure gas removing pipe network (3) and the RGR damping down gas recycling complete device (1);
the power generation device (4) is respectively communicated with the high-pressure gas pipe (2) and the low-pressure gas removal pipe network (3), and the power generation device (4) is connected with the RGR damping-down gas recovery complete device (1) in parallel;
the pressure regulating valve group (5) is respectively communicated with the high-pressure gas pipe (2) and the low-pressure gas removing pipe network (3), and the pressure regulating valve group (5) is connected with the RGR damping down gas recovery complete device (1) in parallel.
2. The combined type efficient energy-saving environment-friendly blast furnace damping down gas recovery device according to claim 1, which is characterized in that: the first valve group (12), the second valve group (21) and the third valve group (22) are identical in structure, the first valve group (12) comprises a first butterfly valve (121) and a first blind plate valve (122), and the first butterfly valve (121) and the first blind plate valve (122) are connected in series;
an exhaust valve group (23) is arranged between the RGR damping down gas recovery complete device (1) and the high-pressure gas pipe (2), and the exhaust valve group (23) and the first valve group (12) have the same structure.
3. The combined type efficient energy-saving environment-friendly blast furnace damping down gas recovery device according to claim 1, which is characterized in that: an anti-pipe network fluctuation device (6) is arranged between the RGR damping down gas recovery complete device (1) and the low-pressure gas removing pipe network (3).
4. The combined high-efficiency energy-saving environment-friendly blast furnace damping down gas recovery device according to claim 3, which is characterized in that: the pipe network fluctuation prevention device (6) comprises a pressure reducing pipe (61), wherein a plurality of small-to-large buffer cavities (612) and guide grooves (613) are sequentially formed in the pressure reducing pipe (61) along the axis direction of the pressure reducing pipe;
the plurality of guide grooves (613) are positioned at the outer sides of the plurality of buffer cavities (612), each two adjacent buffer cavities (612) are communicated through one guide groove (613), the guide grooves (613) are used for guiding gas to one point in the space of the buffer cavity (612), connecting pieces (62) are arranged in the guide grooves (613), and the connecting pieces (62) are respectively connected with the groove walls of the guide grooves (613) and the outer side walls of the buffer cavities (612);
the air inlet end of the guide groove (613) with the smallest relative value is communicated with the air outlet end of the RGR damping down gas recovery complete device (1), and the buffer cavity (612) with the largest relative value is communicated with the air inlet end of the low-pressure gas removal pipe network (3).
5. The combined efficient energy-saving environment-friendly blast furnace damping down gas recovery device according to claim 4, which is characterized in that: the arrangement direction of the air outlet end of the diversion trench (613) is perpendicular to the axis of the pressure reducing pipe (61).
6. The combined efficient energy-saving environment-friendly blast furnace damping down gas recovery device according to claim 4, which is characterized in that: an included angle is formed between the arrangement direction of the air outlet end of the diversion trench (613) and the axis of the pressure reducing pipe (61), and the arrangement direction of the air outlet end of the diversion trench (613) is inclined along the direction close to the air inlet end of the diversion trench.
7. The combined efficient energy-saving environment-friendly blast furnace damping down gas recovery device according to claim 4, which is characterized in that: the cavity wall of the buffer cavity (612) is provided with a guide plate (63), and the guide plate (63) is opposite to the air outlet end of the RGR damping-down gas recovery complete device (1).
8. The combined efficient energy-saving environment-friendly blast furnace damping down gas recovery device according to claim 4, which is characterized in that: the groove diameter of the diversion groove (613) is gradually increased from the air inlet end to the air outlet end, the connecting piece (62) is a plurality of current limiting plates, a plurality of air inlet holes (621) are formed in the end faces, close to the air inlet end of the diversion groove (613), of the current limiting plates, a plurality of air outlet holes (622) are formed in the other ends of the current limiting plates, and at least more than two air outlet holes (622) are communicated with one air inlet hole (621).
9. The combined high-efficiency energy-saving environment-friendly blast furnace damping down gas recovery device according to claim 8, which is characterized in that: the aperture of at least more than two air outlet holes (622) is equal to the aperture of one air inlet hole (621).
10. The combined efficient energy-saving environment-friendly blast furnace damping down gas recovery device according to claim 4, which is characterized in that: and heat dissipation pieces (7) are arranged between the diversion trench (613) and the buffer cavity (612) and on the peripheral wall of the depressurization pipe (61).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310498976.5A CN116479196B (en) | 2023-05-05 | Combined blast furnace damping down gas recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310498976.5A CN116479196B (en) | 2023-05-05 | Combined blast furnace damping down gas recovery device |
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| Publication Number | Publication Date |
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| CN116479196A true CN116479196A (en) | 2023-07-25 |
| CN116479196B CN116479196B (en) | 2024-06-11 |
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| CN217351416U (en) * | 2021-10-25 | 2022-09-02 | 北京中北欧瑞智工程技术有限公司 | Blast furnace diffused gas recycling and diffusing device |
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