CN116334332B - Gas dust removal device, wind-down dust removal system, process and gas full recovery process - Google Patents
Gas dust removal device, wind-down dust removal system, process and gas full recovery process Download PDFInfo
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- CN116334332B CN116334332B CN202310311043.0A CN202310311043A CN116334332B CN 116334332 B CN116334332 B CN 116334332B CN 202310311043 A CN202310311043 A CN 202310311043A CN 116334332 B CN116334332 B CN 116334332B
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- 239000000428 dust Substances 0.000 title claims abstract description 268
- 238000011084 recovery Methods 0.000 title claims abstract description 24
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000008569 process Effects 0.000 title claims abstract description 19
- 238000007599 discharging Methods 0.000 claims abstract description 24
- 238000013016 damping Methods 0.000 claims abstract description 23
- 238000007664 blowing Methods 0.000 claims description 36
- 239000003034 coal gas Substances 0.000 claims description 23
- 230000001965 increasing effect Effects 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 239000004744 fabric Substances 0.000 claims description 7
- 238000004064 recycling Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 15
- 239000007789 gas Substances 0.000 description 191
- 238000001914 filtration Methods 0.000 description 8
- 238000000746 purification Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000009423 ventilation Methods 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003912 environmental pollution Methods 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 241000006351 Leucophyllum frutescens Species 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 210000000664 rectum Anatomy 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/22—Dust arresters
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B2100/00—Handling of exhaust gases produced during the manufacture of iron or steel
- C21B2100/40—Gas purification of exhaust gases to be recirculated or used in other metallurgical processes
- C21B2100/44—Removing particles, e.g. by scrubbing, dedusting
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Blast Furnaces (AREA)
Abstract
The application relates to a gas dust removing device, a damping down dust removing system, a process and a gas full recovery process, which comprise a dust removing tank, a filter bag, an ejector and an ash discharging tank, wherein the filter bag is arranged in the dust removing tank, the ejector is arranged along the axial direction of the dust removing tank, a first end of the ejector is positioned outside the dust removing tank, a second end of the ejector penetrates through the bottom of the filter bag and is positioned in the dust removing tank, the first end of the ejector is provided with a gas inlet and an ejection gas source inlet, the gas inlet is communicated with a gas pipeline, gas to be removed can be injected into the dust removing tank through the gas pipeline and the gas inlet, the ejection gas source inlet is connected with a gas source pipe, a gas source pipe on-off valve is arranged on the gas source pipe, the side wall of the dust removing tank is connected with an exhaust pipe above the filter bag, and the ash discharging tank is communicated with the bottom of the dust removing tank to collect dust falling from the filter bag after the dust removing of the filter bag. The application has the effect of reducing the occupied area of the dust removing equipment as much as possible, thereby reducing the consumption of land resources.
Description
Technical Field
The application relates to the technical field of blast furnace ironmaking, in particular to a gas dust removing device, a damping down dust removing system, a process and a gas full recovery process.
Background
A byproduct called blast furnace gas is generated in the blast furnace damping down process, and the blast furnace gas contains combustible gas components such as carbon monoxide and the like which can be utilized, so that the gas generated in the blast furnace damping down process is recycled, the environment is protected, and the purpose of saving resources is achieved.
The existing damping down gas dust removal technology mainly comprises the steps of sequentially arranging equipment such as a dust remover, an ejector, an exhaust pipe, a gas pipe network and the like on a blast furnace gas pipeline, and filtering, discharging and recycling blast furnace gas by utilizing the equipment, wherein the required equipment is relatively more, so that the engineering amount of the whole installation engineering is huge, the occupied area of the equipment is large, the consumed land resources are relatively more, and the produced noise has larger pollution to the environment.
The existing gas full recovery process mainly comprises the steps of sequentially arranging equipment such as an ejector, a dust remover, an exhaust pipe, a gas pipe network and the like on a gas recovery pipeline of a charging bucket, wherein the equipment occupies a large area and has high noise.
Aiming at the related technology, the defects of large occupied area of dust removing equipment and relatively more consumed land resources exist.
Disclosure of Invention
The application provides a blast furnace dust removal system and a blast furnace dust removal process, which aims to reduce the occupied area of dust removal equipment as much as possible, thereby reducing the consumption of land resources and reducing the pollution of noise to the environment.
The application provides a blast furnace dust removal system and a process, which adopt the following technical scheme:
The utility model provides a coal gas dust collector, includes dust removal jar, filter bag, ejector and dust discharging jar, the filter bag set up in the dust removal jar, the ejector is followed the axial setting of dust removal jar, just the first end of ejector is located the dust removal jar outside, the second end of ejector passes the bottom of filter bag just is located the dust removal jar, the first end of ejector is provided with gas inlet and draws the air supply entry, the gas inlet is linked together with the gas pipe, be provided with gas on-off valve and gas pipe master valve on the gas pipe, wait to remove dust gas can be through gas pipe, gas inlet and the ejector is poured into in the dust removal jar, draw the air supply entry and link to each other with the air supply pipe, be provided with air supply pipe on-off valve on the air supply pipe, the dust removal jar lateral wall, and the top of filter bag are connected with the blast pipe, wait to remove dust behind the dust the filter bag through the blast pipe discharges, the dust discharging jar is linked together with the bottom of dust removal jar in order to collect the dust that falls into from the filter bag.
According to the technical scheme, the ejector, the ash discharging tank and the filter bag are arranged on the dust removing tank, the ejector is used as an air inlet pipeline of coal gas during normal production of the blast furnace, the ejector can introduce a high-pressure air source into the dust removing tank during blowing down of the blast furnace, the gas of blowing down of the blast furnace is recovered into the gas dust removing device, and after filtration and purification, the gas is conveyed to a low-pressure pipe network, so that purification and recovery of the gas of blowing down of the blast furnace are realized.
Preferably, the extending direction of the air source pipe is perpendicular to the axial extending direction of the ejector.
Through adopting above-mentioned technical scheme, when opening the air supply pipe break-make valve, the gas in the air supply pipe is spouted to the ejector inner wall from penetrating the air supply entry, then along ejector axial extending direction entering dust removal jar in, consequently the air current velocity in the ejector is slower relatively, and the noise that its produced is less relatively to operational environment's travelling comfort has been improved.
Preferably, the extending direction of the air source pipe is the same as the axial extending direction of the ejector.
Through adopting above-mentioned technical scheme, when opening the air supply pipe break-make valve, the gas in the air supply pipe is directly sprayed to the dust removal jar along the ejector axial extending direction from the air supply entry that draws, and consequently the air current velocity in the ejector is relatively fast to gas dust removal device's dust removal efficiency and dust removal effect have been improved.
Preferably, the upper end of the dust removal tank is positioned at the necking position of the ejector.
Through adopting above-mentioned technical scheme, when the ejector is in operating condition, because the latus rectum of the throat department of ejector is less relatively, consequently can produce the noise when high velocity of flow gas passes through the throat department, and the upper end of dust removal jar is located the throat department of ejector, consequently the dust removal jar wraps the throat department of ejector to the propagation scope of noise has been reduced, operational environment's travelling comfort has been improved.
Preferably, the bottom side of the dust removal tank is communicated with a bypass air inlet pipe, an air inlet of the bypass air inlet pipe is communicated with a gas pipeline, an air outlet of the bypass air inlet pipe is positioned below the filter bag, and an air inlet on-off valve is arranged on the bypass air inlet pipe.
By adopting the technical scheme, when the pressure in the blast furnace is high, the air inlet on-off valve on the bypass air inlet pipe is opened, so that the air quantity entering the dust removal tank is increased, the ventilation efficiency is improved, and in addition, the ejector channel can be closed, so that the dust quantity of the ejector pipeline is reduced, and the condition that the air source pipe is blocked is avoided as much as possible.
Preferably, the side wall of the dust removal tank is connected with a pulse back-blowing device, a blowing pipe is connected between the pulse back-blowing device and the dust removal tank, and an inlet of the blowing pipe is positioned above the filter bag.
Through adopting above-mentioned technical scheme, when depositing too much dust on the filter bag, can lead to coal gas dust collector's dust removal effect to reduce, consequently can blow down the dust of depositing on the filter bag through pulse blowback device in unloading the ash pipe to resume the dust removal effect of filter bag.
Preferably, a plurality of brackets are filled between the ejector and the inner wall of the dust removal tank, the brackets are arranged in a mutually crossed way, the filter bag is wrapped on the brackets, and
One end of the support is opposite to the inlet of the air blowing pipe, and a wave increasing funnel is arranged at one end of the support close to the air blowing pipe and at the middle part in the support.
According to the technical scheme, the supports are arranged in a mutually crossing mode, noise at the necking position of the ejector does not easily pass through the area between the ejector and the dust removal tank, so that the noise reduction effect is further enhanced, when dust deposited on the filter bag needs to be removed, the pulse back-blowing device is started, the wave-increasing funnel close to the air blowing pipe increases air waves blown out by the air blowing pipe, so that the dust removal effect of the pulse back-blowing device on the filter bag is improved, in addition, as the air waves move to the middle position of the supports, the energy of the air waves is reduced, dust on the filter bag, which is far away from one end of the air blowing pipe, is not easy to remove, and at the moment, the wave-increasing funnel in the middle of the supports increases the air waves again, so that the dust removal effect of the pulse back-blowing device, which is far away from the air blowing pipe, is enhanced.
A blast furnace gas dry dust removal system comprising:
A blast furnace;
the primary dust remover is connected with an output port of the blast furnace through a first pipeline;
the secondary dust collector is connected with an output port of the primary dust collector through a second pipeline, wherein the secondary dust collector at least comprises a cloth bag dust collector and at least one gas dust collector, the gas dust collector is the gas dust collector, and the gas dust collector is provided with a gas inlet and a gas outlet, and the gas inlet is connected with the gas inlet and the gas outlet through a first pipeline
And the gas pipe network is used for receiving the gas discharged from the gas dust removing device and the bag-type dust remover.
In addition, the secondary dust remover at least comprises a cloth bag dust remover and at least one coal gas dust removing device, so that the system realizes the whole purification and recovery effects of the blast furnace coal gas during normal production or during the blowing-down operation of the blast furnace, thereby meeting the coal gas purification and recovery requirements under multiple conditions in the operation of the blast furnace.
A damping down dust removal process comprises the following steps:
When the blast furnace is produced, a cloth bag dust remover is kept in an open state according to the traditional habit, simultaneously the gas on-off valve and the gas pipeline main valve are opened, the gas source pipe on-off valve is closed, gas to be dedusted can be injected into the dedusting tank through the gas pipeline and the gas inlet, the gas to be dedusted is discharged through the exhaust pipe after being dedusted by the filter bag, and the ash discharging tank collects dust falling from the filter bag, and
When the blast furnace is in damping down operation, detecting the pressure and the air quantity of the blast furnace top and the pressure change in the dedusting tank, when the pressure is reduced to a preset range, opening an air source pipe on-off valve to introduce a high-pressure air source into the dedusting tank through the injection air source inlet and the air source pipe, gradually closing a cloth bag dust remover, enabling coal gas to pass through a coal gas dedusting device, dedusting the residual coal gas in the blast furnace, a first pipeline, a primary dedusting pipeline, a second pipeline and the dedusting tank, discharging the residual coal gas out of the dedusting tank, and entering a downstream pipeline.
By adopting the technical scheme, the process can be used for purifying the blast furnace gas as other blast furnace gas dust removal devices when the blast furnace is in normal production, can continue to run when the blast furnace is in damping down operation, can be suitable for different working conditions, and can be used for converting the working mode through simple operation in practice.
The full gas recovery process comprises the following steps:
Detecting the pressure in the blast furnace charging bucket, opening an air source pipe on-off valve when the pressure is reduced to a preset range, so as to introduce a high-pressure air source into the dust removal bucket through an injection air source inlet of the injector and an air source pipe, recovering and removing residual coal gas in the blast furnace charging bucket, discharging the residual coal gas out of the dust removal bucket, and
And recovering the gas discharged from the dust removing tank.
By adopting the technical scheme, the advantages of the old process are reserved, the problems of large occupied area and high noise of the old process are solved, and the system is more perfect and friendly.
In summary, the present application includes at least one of the following beneficial technical effects:
1. Saving the engineering amount and occupied space of reconstruction. The method meets the gas purification and recovery requirements under multiple working conditions in the operation of the blast furnace, improves the gas recovery rate in a damping-down state, reduces the environmental pollution, and can well solve the noise problem of the prior patent;
2. the arrangement of the bypass air inlet pipe can enable the gas dust removing device to be suitable for different working states of the blast furnace, so that the applicability of the gas dust removing device is improved;
3. The combined use of the back-blowing pulse device and the wave-increasing funnel greatly improves the dust removing effect on the filter bag, thereby improving the durability of the gas dust removing device;
4. The filter box has the advantages of increasing the total filtering area of the blast furnace gas dust removing device, reducing the filtering speed of gas, prolonging the service life of the filter bag, increasing the number of the filter boxes and being beneficial to improving the reliability of dry dust removal of gas.
5. When the blast furnace is in normal running, the gas dust collector can also be used as a common blast furnace gas dust collector, so that the use efficiency of the equipment is improved.
Drawings
Fig. 1 is a schematic overall structure of embodiment 1 of the present application.
Fig. 2 is a schematic structural view of a stent in embodiment 1 of the present application.
Fig. 3 is a schematic structural diagram of an increasing funnel in embodiment 1 of the present application.
FIG. 4 is a schematic illustration of the connection of the support to the ejector in example 1 of the present application.
Fig. 5 is a schematic overall structure of embodiment 2 of the present application.
Fig. 6 is a schematic overall structure of embodiment 3 of the present application.
Fig. 7 is a schematic overall structure of embodiment 5 of the present application.
The dust collector comprises a dust collector 1, a dust removing tank 12, a filter bag 13, an ejector 131, a gas inlet 132, an ejector gas source inlet 14, an ash discharging tank 141, an upper ash discharging valve 142, an ash discharging port 143, a lower ash discharging valve 144, a diffusing pipe 1441, a diffusing pipe on-off valve 15, an exhaust pipe 151, an exhaust pipe on-off valve 2, a gas pipeline 21, a gas on-off valve 22, a gas pipeline main valve 23, a recovery valve 3, a gas source pipe 31, a gas source pipe on-off valve 4, a bypass inlet pipe 41, a gas inlet on-off valve 5, a pulse back blowing device 51, a gas blowing pipe 6, a bracket 61, a through groove 62, a wave increasing funnel 7, a blast furnace 8, a first pipeline 9, a second pipeline 10, a primary dust collector 101, a secondary dust collector 1011, a bag dust collector 102, a gas pipe network 1021, a clean gas pipe 1022, a gas residual pressure recovery device, 1023, a gas residual pressure 1024, a low pressure gas pipe 103, a gas inlet 104, a high-pressure delivery valve and a high-pressure delivery valve.
Detailed Description
The application is described in further detail below with reference to fig. 1-6.
Example 1
The embodiment of the application discloses a gas dust removal device. Referring to fig. 1, a gas dust removing apparatus includes a dust removing tank 11, a filter bag 12, an ejector 13, and an ash discharging tank 14.
The filter bag 12 is arranged in the dust removal tank 11, the ejector 13 and the dust removal tank 11 are coaxially arranged, a first end of the ejector 13 is positioned outside the dust removal tank 11, a second end of the ejector 13 penetrates through the bottom of the filter bag 12 and is positioned in the dust removal tank 11, a gas inlet 131 and an ejection gas source inlet 132 are formed in the first end of the ejector 13, the gas inlet 131 is communicated with the gas pipeline 2, one end of the gas pipeline 2 is communicated with the blast furnace 7, the gas pipeline 2 is provided with the gas on-off valve 21 and the gas pipeline main valve 22, and gas to be dedusted can be injected into the dust removal tank 11 through the gas pipeline 2 and the gas inlet 131. In this embodiment, the gas pipe main valve 22 may not be provided according to actual situations, and in this embodiment, the gas pipe main valve 22 is preferably provided.
In addition, the injection air source inlet 132 is connected with the air source pipe 3, the extending direction of the air source pipe 3 is perpendicular to the axial extending direction of the injector 13, and the air source pipe 3 is provided with an air source pipe on-off valve 31. The air source communicated with the air source pipe 3 can be clean gas such as coal gas, nitrogen, steam and the like.
The side wall of the dust removal tank 11 and the upper part of the filter bag 12 are connected with an exhaust pipe 15, an exhaust pipe on-off valve 151 is arranged on the exhaust pipe 15, and the gas to be removed is discharged through the exhaust pipe 15 after being removed through the filter bag 12.
The side wall of the dust removal tank 11 is also connected with a pulse back-blowing device 5, a blowing pipe 51 is connected between the pulse back-blowing device 5 and the dust removal tank 11, and an inlet of the blowing pipe 51 is positioned above the filter bag 12. The pulse back-blowing device 5 can blow off the dust deposited on the filter bag 12 so as to restore the dust removing effect of the filter bag 12.
The bottom side of the dust removal tank 11 is communicated with a bypass air inlet pipe 4, an air inlet of the bypass air inlet pipe 4 is communicated with the gas pipeline 2, an air outlet of the bypass air inlet pipe 4 is positioned below the filter bag 12, and an air inlet on-off valve 41 is arranged on the bypass air inlet pipe 4. The intake on-off valve 41 may be a butterfly valve, a shut-off valve, a check valve, a valve group, or the like. When the pressure in the blast furnace 7 is large, the air inlet on-off valve 41 on the bypass air inlet pipe 4 is opened, so that the air quantity entering the dust removal tank 11 is increased, and the ventilation efficiency is improved, and in addition, the gas on-off valve 21 is closed to close the channel of the ejector 13, so that the dust quantity of the pipeline of the ejector 13 is reduced, and the condition that the air source pipe 3 is blocked is avoided as much as possible.
Finally, an ash discharge tank 14 communicates with the bottom of the dust collection tank 11 to collect dust falling from the filter bag 12. An upper ash discharge valve 141 is provided at a communication point between the ash discharge tank 14 and the dust collection tank 11. The bottom of the ash discharge tank 14 is provided with an ash discharge opening 142, and a lower ash discharge valve 143 is arranged at the ash discharge opening 142.
The sidewall of the ash discharging tank 14 is connected with a blow-off pipe 144, and the blow-off pipe 144 is provided with a blow-off pipe on-off valve 1441.
In summary, the ejector 13, the ash discharging tank 14 and the filter bag 12 are all arranged on the dust removing tank 11, and the space used by the gas dust removing device is the same as that of the existing bag-type dust remover, so that equipment facilities such as pipelines, equipment supports and valve operating platforms which are independently arranged for the ejector are avoided, the occupied area of the equipment is reduced, external auxiliary facilities are simplified, and reasonable layout of the equipment under the condition of tense space layout is facilitated.
In addition, because the gas pipeline originally arranged at the center of the dust removal tank 11 is replaced by the ejector, the ejector and the dust remover are skillfully integrated into one device, the dust remover shell is taken as a huge shell of the ejector, the filter bag 12 for filtering dust is arranged inside the dust remover shell, a set of sound insulation cover of the ejector 13 is naturally formed, huge noise generated when the ejector 13 works is sealed inside the dust removal tank 11, noise pollution around the device is greatly reduced, the working environment of on-site workers is improved, and occupational health is facilitated.
Referring to fig. 1, in order to further reduce the volume of noise generated when the ejector 13 is operated as much as possible, the upper end of the dust tank 11 is located at the throat of the ejector 13. The necking part of the ejector 13 is wrapped by the whole dust removal tank 11 so as to prevent noise at the necking part from being transmitted outwards as much as possible.
In addition, referring to fig. 1 and 2, a plurality of brackets 6 are filled between the ejector 13 and the inner wall of the dust removal tank 11. The cross-sectional shape of the bracket can be square, rectangle, diamond and the like, and is preferably circular in the implementation. A plurality of through grooves 61 are formed on the side wall of the bracket 6. The filter bag is sleeved on the bracket and is abutted with the outer peripheral wall of the bracket.
Referring to fig. 3, a plurality of holders 6 are arranged to cross each other, and a filter bag 12 wraps the holders 6. The brackets 6 are arranged to cross each other, so that the propagation path of noise is bent, and the sound wave of the noise is slowly dissipated among the brackets 6, so that the noise volume generated when the ejector 13 works is further reduced.
Referring to fig. 2 and 4, in order to enhance the dust removing effect of the pulse back-blowing device 5 on the filter bag 12, a wave-increasing funnel 62 is disposed at one end of the bracket 6 close to the air blowing pipe 51 and at the middle part in the bracket 6. The wave-increasing funnel 62 is a tubular body with wide ends and narrow middle, when the air wave blown out from the air blowing pipe 51 enters from one end of the wave-increasing funnel 62, the air wave is compressed at a certain degree at a narrow position due to the narrow middle of the wave-increasing funnel 62, then the air wave reaches a wide opening at the other end of the wave-increasing funnel 62, the flow speed of the air wave is accelerated, and part of the air wave is dispersed along the periphery, so that the air wave passes through the through groove 61 on the bracket 6 and blows to the filter bag 12, the blowing direction of the air wave forms a certain included angle with the filter bag 12, and the air wave is blown to the filter bag 12 from the inner periphery of the filter bag 12, so that the air wave is relatively easier to blow off dust on the filter bag 12.
In addition, the energy of the air wave is relatively reduced along with the movement of the air wave, so that the wave-increasing funnel 62 arranged at the middle part in the bracket 6 again enhances the energy of the air wave, thereby blowing off dust on the part of the filter bag 12 relatively far from the air blowing pipe 51, and further enhancing the dust removing effect on the filter bag 12.
In embodiment 2, referring to fig. 5, the difference between this embodiment and embodiment 1 is that the position of the air source tube 3 is different, and the extending direction of the air source tube 3 is the same as the axial extending direction of the ejector 13.
When the gas source pipe on-off valve 31 is opened, the gas in the gas source pipe 3 is directly injected into the dust removal tank 11 along the axial extending direction of the ejector 13 from the injection gas source inlet 132, so that the gas flow speed in the ejector 13 is relatively high, and the dust removal efficiency of the gas dust removal device 1 is relatively high and the dust removal effect is relatively good.
Example 3
The embodiment of the application discloses a dry dust removal system for blast furnace gas. Referring to fig. 6, the blast furnace gas dry dust removing system comprises a blast furnace 7, a primary dust remover 10, a secondary dust remover 101 and a gas pipe network 102.
The blast furnace 7 is used for smelting, and the gas generated during smelting of the blast furnace contains combustible gas components such as carbon monoxide which can be utilized, and the combustible gas components need to be sequentially dedusted by a multi-stage deduster.
The primary dust remover 10 is connected with the output port of the blast furnace 7 through the first pipeline 8, and the primary dust remover in the embodiment can be a gravity dust remover, an inertial dust remover, a cyclone dust remover, a filter dust remover, a wet dust remover and the like, and the primary dust remover 10 mainly performs primary dust removal on large particles in coal gas.
The secondary dust remover 101 is connected with an output port of the blast furnace 7 through a second pipeline 9, and the secondary dust remover 101 mainly removes dust further on the primarily removed gas so as to improve the dust removal effect. The secondary dust remover 101 at least comprises one gas dust remover 1, wherein the gas dust remover 1 is provided with an ejector 13 and an air source pipe 3, the other secondary dust removers 101 are cloth bag dust removers 1011 without the ejector 13 and the air source pipe 3, and the quantity of the gas dust removers 1 and the cloth bag dust removers 1011 can be determined according to the quantity of gas generated by a blast furnace so as to be suitable for different states of the blast furnace during working. And the bag-type dust remover 1011 can have various structures such as an ejection structure, a bottom ejection structure and the like.
A gas pipe network 102 for receiving the gas discharged from the secondary dust collector 101 so as to recover the recyclable gas.
The number of the secondary dust collectors 101 can be determined according to specific situations, the multiple secondary dust collectors 101 are connected in parallel or connected in series through pipelines, and an ash conveying pipe 103 is arranged below the secondary dust collectors 101, and each ash discharging tank 14 of the secondary dust collectors 101 is communicated with the ash conveying pipe 103.
When the ash is discharged from the ash discharge tank 14, the upper ash discharge valve 141 is closed, and the on-off valve of the diffusing pipe 144 and the lower ash discharge valve 143 are opened, so that the dust in the tank is discharged to the ash conveying pipe 103 through the ash discharge hole 142. The discharged dust can be transported away by a vehicle for recycling after passing through a humidifying ash discharger, and can be directly collected by a closed tank car for recycling. And the waste water can be collected into a large ash plant of a dry dedusting system in a concentrated manner for concentrated treatment. Meanwhile, according to actual situation, the ash conveying pipe 103 or other ash receiving devices can be omitted below the secondary dust collector 101.
Finally, the gas pipe network 102 includes a clean gas pipe 1021, a residual gas pressure recovery device 1022 (TR or BPRT), a pressure reducing valve 1023, and a low pressure gas pipe 1024, the exhaust pipe 15 on the dust remover is all connected with the clean gas pipe 1021, and the clean gas pipe 1021, the residual gas pressure recovery device 1022, and the low pressure gas pipe 1024 are sequentially connected, the pressure reducing valve 1023 is connected in parallel with the residual gas pressure recovery device 1022, and the pressure reducing valve 1023 can decompress the recovered gas for subsequent use.
When the blast furnace 7 is in a damping down operation state, the change of the pressure and the air quantity at the top of the blast furnace 7 is detected, when the pressure and the air quantity are reduced to a preset range, the air source pipe on-off valve 31 is opened to introduce a high-pressure air source into the dust removal tank 11 through the injection air source inlet 132 and the air source pipe 3, meanwhile, the bag dust remover 1011 is gradually closed, so that the gas passes through the gas dust removal device 1, the blast furnace 7, the first pipeline 8, the primary dust remover 10 and the second pipeline 9 are discharged out of the dust removal tank 11 after dust removal, and the gas is conveyed to the gas pipe network 102 after filtration and purification, thereby realizing the purification and recovery of the damping down gas of the blast furnace.
The system in this embodiment increases the area of the filter bag 12 of the whole system by providing the primary dust collector 10 and the secondary dust collector 101, thereby increasing the total filtering area of the blast furnace gas dust collector 1. And the number of the filter bags 12 is increased, so that the filtering speed of the coal gas is reduced, and the service life of the filter bags 12 is prolonged. Meanwhile, the system increases the number of the filter boxes and improves the reliability of gas dry dust removal. Moreover, the system meets the gas purification and recovery requirements under multiple working conditions in the operation of the blast furnace 7, improves the gas recovery rate in the damping-down state, and reduces the environmental pollution.
The implementation principle of the blast furnace gas dry dust removal system of the embodiment of the application is that when the blast furnace 7 is normally produced, the bag-type dust remover 1011 is kept in an open state according to the traditional habit, and simultaneously, a gas on-off valve 21, a gas pipeline main valve 22 and a gas source pipe on-off valve 31 on a gas pipeline 2 are opened, gas is injected into an ejector 13 from the gas pipeline 2 and a gas inlet 131, and then enters the bottom of a dust removal tank 11 along the ejector 13. Then the gas rises from the bottom of the dust-removing tank 11 to pass through the filter bag 12, the filter bag 12 filters the gas, and the filtered gas is discharged out of the dust-removing tank 11 along the exhaust pipe 15 above the dust-removing tank 11. The filtered dust is collected by another device according to the actual situation. In addition, when the air quantity of the blast furnace 7 is large, an air inlet on-off valve 41 on the bypass air inlet pipe 4 is opened, coal gas directly enters the bottom of the dust removal tank 11 from the bypass air inlet pipe 4 to improve ventilation efficiency, and a channel of the ejector 13 can be closed through the coal gas on-off valve 21 to reduce the dust quantity of a pipeline of the ejector 13, so that the condition that the air source pipe 3 is blocked is avoided as much as possible. In this state, the injector 13 is used only as a pipe for transporting blast furnace gas so that the gas pipe 2 and the gas inlet 131 can smoothly enter the dust removing tank 11.
When the blast furnace 7 is in a damping down operation state, the blast furnace 7 top pressure and air quantity change, when the pressure and air quantity fall to a preset range, the air source pipe on-off valve 31 is opened to introduce a high-pressure air source into the dust removal tank 11 through the injection air source inlet 132 and the air source pipe 3, and meanwhile, the bag dust remover 1011 is gradually closed, so that the gas passes through the gas dust removal device 1, and the residual gas of the blast furnace 7, the first pipeline 8, the primary dust remover 10 and the second pipeline 9 is removed and discharged out of the dust removal tank 11. In this state, the ejector 13 has an ejector function, and is used for ejecting a high-pressure gas source into the dust removal tank, and high-pressure gas is ejected into the ejector through a nozzle to form negative pressure, so that residual gas in the blast furnace 7, the first pipeline 8, the primary dust remover 10 and the second pipeline 9 is forcedly recovered, and the full recovery of the damping down and releasing gas is realized.
The process solves the problem that the prior process can not realize the treatment of the damping down and releasing gas, simultaneously realizes the complete recovery of the damping down and releasing gas of the blast furnace 7, and no longer has the pollution problem of the damping down and releasing gas on the direct air discharge.
Example 4
The embodiment of the application discloses a damping down dust removal process, which comprises the following steps of:
during blast furnace production, the bag-type dust remover 1011 is kept in an open state according to the conventional habit, the gas on-off valve 21 and the gas pipeline main valve 22 are simultaneously opened, the gas source pipe on-off valve 31 is closed, the gas to be dedusted can be injected into the dedusting tank 11 through the gas pipeline 2 and the gas inlet 131, the gas to be dedusted is discharged through the exhaust pipe 15 after being dedusted through the filter bag 12, and the dust falling from the filter bag 12 is collected by the dust discharging tank 14, and
When the blast furnace 7 is in damping down operation, the blast furnace 7 furnace top pressure, the blast volume and the pressure in the dust removal tank 11 are changed, when the pressure is reduced to a preset range, the air source pipe on-off valve 31 is opened to introduce a high-pressure air source into the dust removal tank 11 through the injection air source inlet 132 and the air source pipe 3, meanwhile, the bag dust remover 1011 is gradually closed, so that the gas passes through the gas dust removal device 1, and the residual gas in the blast furnace 7, the first pipeline 8, the primary dust remover 10, the second pipeline 9 and the dust removal tank 11 is removed, and then discharged out of the dust removal tank 11 and enters a downstream pipeline.
In summary, the gas dust removing device 1, the damping down dust removing system and the damping down dust removing process provided by the application have the advantages that the ejector 13 is arranged in the dust removing tank 11, the blast furnace 7 can purify blast furnace gas as other bag dust removers 1011 in normal production, the system can continue to operate when the blast furnace 7 is subjected to damping down operation, the process can be suitable for different working conditions, and in practice, the working mode can be converted through simple operation, and the high-pressure gas source can be gas, nitrogen, steam and the like, so that the application range is wide.
Example 5
Referring to fig. 7, the embodiment discloses a gas full recovery process, which specifically comprises the following steps:
Step S1, detecting the pressure in the blast furnace charging bucket 104, opening the gas source pipe on-off valve 31 when the pressure falls to a preset range, introducing a high-pressure gas source into the dedusting tank 11 through the injection gas source inlet 132 and the gas source pipe 3, recycling residual gas in the dedusting tank 11, dedusting, and discharging the residual gas out of the dedusting tank 11.
Step S2, recovering the gas discharged from the dust removal tank 11 by using the gas pipe network 102 as in example 4.
The blast furnace charging bucket 104 is a device used together with the blast furnace 7, and is mainly used for feeding materials into the blast furnace. In the production of the blast furnace 7, the pressure in the blast furnace 7 needs to be the same as the pressure in the blast furnace tank 104, so that a certain amount of gas is also present in the blast furnace tank 104, and the gas in the blast furnace tank 104 can be recovered by the above-mentioned process.
The above embodiments are not intended to limit the scope of the application, so that the equivalent changes of the structure, shape and principle of the application are covered by the scope of the application.
Claims (8)
1. A gas dust removing device is characterized by comprising a dust removing tank (11), a filter bag (12), an ejector (13) and an ash discharging tank (14), wherein the filter bag (12) is arranged in the dust removing tank (11), the ejector (13) is arranged along the axial direction of the dust removing tank (11), a first end of the ejector (13) is positioned outside the dust removing tank (11), a second end of the ejector (13) penetrates through the bottom of the filter bag (12) and is positioned in the dust removing tank (11), a gas inlet (131) and an ejector gas source inlet (132) are arranged at the first end of the ejector (13), the gas inlet (131) is communicated with a gas pipeline (2), a gas on-off valve (21) and a gas pipeline main valve (22) are arranged on the gas pipeline (2), the to-be-removed dust can be injected into the dust removing tank (11) through the gas pipeline (2), the gas inlet (131) and the ejector (13), the ejector gas inlet (132) is connected with a gas source pipe (3) and a gas source pipe (15) which is connected with the dust removing tank (12) through the gas source pipe (15), the ash discharging tank (14) is communicated with the bottom of the dust removing tank (11) to collect dust falling from the filter bag (12);
The upper end of the dust removal tank (11) is positioned at the necking position of the ejector (13);
the dust removal tank is characterized in that a bypass air inlet pipe (4) is communicated with the bottom side of the dust removal tank (11), an air inlet of the bypass air inlet pipe (4) is communicated with the gas pipeline (2), an air outlet of the bypass air inlet pipe (4) is positioned below the filter bag (12), and an air inlet on-off valve (41) is arranged on the bypass air inlet pipe (4).
2. A gas dust collector as set forth in claim 1, wherein the gas source pipe (3) extends in a direction perpendicular to the axial direction of the ejector (13).
3. A gas dust collector as set forth in claim 1, wherein the gas source tube (3) extends in the same direction as the axial direction of the ejector (13).
4. A gas dust collector as set forth in any one of claims 1-3, wherein a pulse back blowing device (5) is connected to the side wall of the dust collector (11), a gas blowing pipe (51) is connected between the pulse back blowing device (5) and the dust collector (11), and an inlet of the gas blowing pipe (51) is located above the filter bag (12).
5. The gas dust collector as set forth in claim 1, wherein a plurality of brackets (6) are filled between the ejector (13) and the inner wall of the dust collection tank (11), the brackets (6) are arranged in a crossing manner, the filter bag (12) wraps the brackets (6), and
One end of the support (6) is opposite to the inlet of the air blowing pipe (51), and a wave increasing funnel (62) is arranged at one end of the support (6) close to the air blowing pipe (51) and at the middle part in the support (6).
6. A blast furnace gas dry dust removal system, comprising:
A blast furnace (7);
the primary dust remover (10) is connected with an output port of the blast furnace (7) through a first pipeline (8);
A secondary dust collector (101) connected with the output port of the primary dust collector (10) through a second pipeline (9), wherein the secondary dust collector (101) at least comprises a cloth bag dust collector (1011) and at least one gas dust collector (1), the gas dust collector (1) is the gas dust collector (1) as set forth in any one of claims 1-5, and
And a gas pipe network (102) for receiving the gas discharged from the gas dust collector (1) and the bag-type dust collector (1011).
7. A damping down dust removal process, characterized in that a blast furnace gas dry dust removal system according to claim 6 is provided, and comprises the following steps:
When the blast furnace (7) is produced, a bag-type dust remover (1011) is kept in an open state according to the conventional habit, meanwhile, a gas on-off valve (21) and a gas pipeline main valve (22) are opened, a gas source pipe (3) on-off valve is closed, gas to be dedusted can be injected into a dedusting tank (11) through a gas pipeline (2) and a gas inlet (131), the gas to be dedusted is discharged through an exhaust pipe (15) after being dedusted through a filter bag (12), and dust falling from the filter bag (12) is collected by a dust discharging tank (14), and
When the blast furnace (7) is in damping down operation, detecting the pressure and the air quantity of the blast furnace (7) and the pressure change in the dust removal tank (11), when the pressure is reduced to a preset range, opening an on-off valve of an air source pipe (3) so as to introduce a high-pressure air source into the dust removal tank (11) through the injection air source inlet (132) and the air source pipe (3), and gradually closing a bag dust remover (1011) to enable coal gas to pass through the coal gas dust removal device (1), dedusting the residual coal gas in the blast furnace (7), the first pipeline (8), the primary dust remover (10), the second pipeline (9) and the dust removal tank (11), and discharging the residual coal gas out of the dust removal tank (11) to enter a downstream pipeline.
8. A gas full recovery process, characterized in that a gas dust removal device according to any one of claims 1-5 is provided, and comprising the steps of:
Detecting the pressure in the blast furnace charging bucket (104), opening an on-off valve of an air source pipe (3) when the pressure is reduced to a preset range, so as to introduce a high-pressure air source into the dust removal tank (11) through an injection air source inlet (132) of the injector (13) and the air source pipe (3), recycling and removing the residual coal gas in the blast furnace charging bucket (104) and discharging the residual coal gas out of the dust removal tank (11), and
Recovering the gas discharged from the dust removing tank (11).
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| CN202310311043.0A CN116334332B (en) | 2023-03-27 | 2023-03-27 | Gas dust removal device, wind-down dust removal system, process and gas full recovery process |
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| CN202310311043.0A CN116334332B (en) | 2023-03-27 | 2023-03-27 | Gas dust removal device, wind-down dust removal system, process and gas full recovery process |
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| CN117265195A (en) * | 2023-10-13 | 2023-12-22 | 中冶京诚工程技术有限公司 | Buffer device and blast furnace damping-down gas recovery system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062379A (en) * | 1990-12-15 | 1992-07-01 | 冶金工业部重庆钢铁设计研究院 | Forced recovery device for blast furnace top pressure-discharging gas |
| CN204121901U (en) * | 2014-09-30 | 2015-01-28 | 宝丰恒瑞新材料有限公司 | A kind of flash distillation machine dust collecting box |
| CN105349723A (en) * | 2015-12-08 | 2016-02-24 | 中冶京诚工程技术有限公司 | Combined dry type dust removing equipment |
| CN219470090U (en) * | 2023-03-27 | 2023-08-04 | 北京中北欧瑞智工程技术有限公司 | Gas dust removal device and blast furnace gas dry dust removal system |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2826808C2 (en) * | 1978-06-19 | 1983-12-08 | Hans-Johann 5650 Solingen Obermeier | Cyclone dust collector |
| CN2062252U (en) * | 1989-12-29 | 1990-09-19 | 吴江除尘设备厂 | Low pressure side spray pulse bag duster |
| CN103939127B (en) * | 2014-04-04 | 2016-03-23 | 中国矿业大学(北京) | Ejector dust collector with multiple flared diffusers |
| CN203923225U (en) * | 2014-06-18 | 2014-11-05 | 鞍钢集团工程技术有限公司 | Force to reclaim the device of blast furnace out-spreading coal gas |
| CN217868942U (en) * | 2022-07-18 | 2022-11-22 | 北京中冶蓝天科技有限公司 | Damping-down coal gas full recovery system |
-
2023
- 2023-03-27 CN CN202310311043.0A patent/CN116334332B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1062379A (en) * | 1990-12-15 | 1992-07-01 | 冶金工业部重庆钢铁设计研究院 | Forced recovery device for blast furnace top pressure-discharging gas |
| CN204121901U (en) * | 2014-09-30 | 2015-01-28 | 宝丰恒瑞新材料有限公司 | A kind of flash distillation machine dust collecting box |
| CN105349723A (en) * | 2015-12-08 | 2016-02-24 | 中冶京诚工程技术有限公司 | Combined dry type dust removing equipment |
| CN219470090U (en) * | 2023-03-27 | 2023-08-04 | 北京中北欧瑞智工程技术有限公司 | Gas dust removal device and blast furnace gas dry dust removal system |
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