CN110184409B - Dry-method electric bag combined dust removal system for eliminating smoke plume by ultralow emission of primary flue gas of converter - Google Patents
Dry-method electric bag combined dust removal system for eliminating smoke plume by ultralow emission of primary flue gas of converter Download PDFInfo
- Publication number
- CN110184409B CN110184409B CN201910648725.4A CN201910648725A CN110184409B CN 110184409 B CN110184409 B CN 110184409B CN 201910648725 A CN201910648725 A CN 201910648725A CN 110184409 B CN110184409 B CN 110184409B
- Authority
- CN
- China
- Prior art keywords
- smoke
- flame arrester
- converter
- flue gas
- compressed nitrogen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000000779 smoke Substances 0.000 title claims abstract description 140
- 239000000428 dust Substances 0.000 title claims abstract description 104
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims description 54
- 239000003546 flue gas Substances 0.000 title claims description 53
- 238000000034 method Methods 0.000 title description 27
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 72
- 238000001816 cooling Methods 0.000 claims abstract description 25
- 239000007789 gas Substances 0.000 claims abstract description 22
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 20
- 239000012717 electrostatic precipitator Substances 0.000 claims abstract description 20
- 238000004200 deflagration Methods 0.000 claims abstract description 17
- 238000009834 vaporization Methods 0.000 claims abstract description 12
- 230000008016 vaporization Effects 0.000 claims abstract description 12
- 239000004744 fabric Substances 0.000 claims abstract description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 26
- 238000010438 heat treatment Methods 0.000 claims description 15
- 238000009833 condensation Methods 0.000 claims description 13
- 230000005494 condensation Effects 0.000 claims description 13
- 238000004880 explosion Methods 0.000 claims description 12
- 238000004321 preservation Methods 0.000 claims description 6
- 230000001629 suppression Effects 0.000 claims 2
- 235000019504 cigarettes Nutrition 0.000 claims 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 23
- 238000005260 corrosion Methods 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 4
- 230000008030 elimination Effects 0.000 abstract description 3
- 238000003379 elimination reaction Methods 0.000 abstract description 3
- 230000005684 electric field Effects 0.000 description 8
- 238000007664 blowing Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 6
- 230000000979 retarding effect Effects 0.000 description 6
- 239000003034 coal gas Substances 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 238000009628 steelmaking Methods 0.000 description 4
- 238000013022 venting Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229910052742 iron Inorganic materials 0.000 description 3
- 239000010865 sewage Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000003595 mist Substances 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 206010020880 Hypertrophy Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C2100/00—Exhaust gas
- C21C2100/02—Treatment of the exhaust gas
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chimneys And Flues (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The application relates to a dry electric bag combined dust removal system for eliminating smoke plumes by ultra-low emission of primary smoke of a converter, which is connected with a vaporization cooling flue, the vaporization cooling flue is connected with an evaporative cooler, the evaporative cooler is sequentially connected with an electrostatic precipitator, a multi-tube type anti-deflagration flame arrester, a pulse cloth bag dust remover, a smoke plumping elimination device, a fan, a switching station and a chimney through a smoke pipeline, the switching station is also connected with a gas tank, the electrostatic precipitator, the multi-tube type anti-deflagration flame arrester and the pulse cloth bag dust remover are all connected with a pneumatic ash conveying system, the pneumatic ash conveying system is connected with a compressed nitrogen gas source, the compressed nitrogen gas source is also connected with the evaporative cooler, the multi-tube type anti-deflagration flame arrester and the pulse cloth bag dust remover, and the dry electric bag combined dust removal system for eliminating smoke plumes by ultra-low emission of primary smoke of the converter is explosion-proof and dew-proof, ensures that smoke emission stably reaches the standard, eliminates water vapor in smoke, reduces corrosion to the pipeline and eliminates smoke plumes.
Description
Technical Field
The application relates to a dust removal system, in particular to a dry electric bag combined dust removal system for eliminating smoke plume by ultra-low emission of primary smoke of a converter.
Background
Converter steelmaking has become the main steelmaking process of iron and steel enterprises, and the converter produces gas containing carbon monoxide as the main component, a small amount of carbon dioxide and other trace components in the blowing process, and a large amount of ferric oxide, metallic iron particles and other fine particle solid dust are also entrained in the gas, so that the gas has serious pollution to the atmosphere and workshop environment. Therefore, the improvement of the technical level of a converter dust removal system, and the effective control and reduction of the emission of pollutants in the steelmaking atmosphere are the problems to be solved currently.
The China iron and steel industry is in the period of structure adjustment and optimization upgrading, faces increasingly severe resource and environmental pressure, and must go on the sustainable development path of resource conservation and environmental friendliness. The recovery and utilization of the converter gas is significant for energy conservation and consumption reduction in steelmaking and environmental pollution reduction.
The temperature of the outlet of the converter flue gas is about 1400-1600 ℃ and the dust concentration is 70-200 g/m, after leaving the furnace outlet, the converter flue gas is cooled to 800-1000 ℃ by adopting a vaporization cooling flue or a water cooling flue, and then enters a flue gas dust removal system to reduce the dust concentration so as to meet the national emission standard and the requirements of gas users. At present, a primary flue gas dust removal system of a domestic converter mainly comprises a traditional OG method, a novel OD method, a semi-dry method, a dry method and other dust removal systems.
(1) The whole process of the traditional OG dust removal system adopts a wet treatment process, and the technology has the defects that: (1) the dust content of the treated coal gas is high and cannot reach 10mg/m or less, and an electric dust remover is arranged at the rear part of the coal gas to carry out fine dust removal so as to reduce the dust mass concentration to 10mg/m or less; (2) secondary pollution exists in the system, and sewage is required to be treated; (3) the system has large resistance loss, so the energy consumption is high and the occupied area is large. Along with the improvement of national energy conservation and emission reduction requirements, the traditional OG method dust removal system can not meet the requirements.
(2) The novel OG method dust removing system is improved on the basis of the traditional OG method dust removing system. The technology has the characteristics of simple flow, less unit equipment, small resistance loss and the like. The RSW technology is adopted in the second text (namely, the adjustable throat of the second text is changed into a circular seam washer), so that the dust removal efficiency is high, the control is easy, and the blockage is not easy. The discharge concentration is reduced, but the circulating water amount is not reduced much, and the ash cleaning period of the fan impeller is not prolonged.
(3) The semi-dry dust removing system is based on the evaporative cooling technology adopting a dry method, and spray dust removal is still adopted for dust removal. The process has the advantages that: (1) the system resistance is reduced, and the dust emission is ensured to be less than or equal to 50mg/m or the electricity is saved by 1-2 kWh per ton of steel; (2) the circulating water quantity is reduced by 50%; (3) the maintenance period of the fan is prolonged. However, the technology still has secondary pollution and sewage treatment.
(4) The dry dedusting of converter gas is developed by foreign companies in the last 60 years of the 20 th century. The basic principle of the dry dust removal of the converter is that high-temperature coal gas after passing through a vaporization flue is sprayed with water for cooling, the temperature of the coal gas is reduced to about 200 ℃ from 800 ℃ to 1000 ℃, and an electric dust remover is adopted for treatment. The converter dry dedusting system mainly comprises: evaporative cooler, electrostatic precipitator, gas switch, gas cooler, diffusing chimney, ash removal system, etc.
The most outstanding advantages are that: the dust content of the purified flue gas is 10mg/Nm 3 ～20mg/Nm 3 If special requirements are met, the concentration can be reduced to 5mg/Nm 3 。
The core of the dry dedusting is temperature control, including the temperature of an EC (evaporative cooler) inlet and outlet and the temperature of an EP (electrostatic precipitator) inlet and outlet, the control of the temperature is the premise of ensuring the normal operation of a dry dedusting system, the basis of the temperature control is to ensure that the phenomenon of air flow condensation does not occur in an electric field of the EP, the phenomenon of humidity does not occur in the electric field, and adsorbed dust is dry and not humid. If the air flow temperature is too low, the generated dust will be hardened to cause the blockage of an EC coarse ash conveying system and an EP fine ash conveying system, and the wet dust is easy to hang on a cathode wire and an anode plate, is not easy to fall down to cause the hypertrophy of the cathode wire, reduces the polar distance, causes the increase of the discharge frequency of an electric field, is easy to cause explosion discharge, affects the dust removing efficiency of a dust remover, and more seriously aggravates the corrosion of equipment in the electric field and reduces the service life of the equipment; in addition, the air flow temperature is too low, so that water accumulation phenomenon occurs in the fan, and the corrosion speed of the fan impeller is increased; however, excessive temperature of the air flow will cause extra burning loss of the equipment, and reduce the dust removing effect of the electric field.
Therefore, for dry dedusting, the control of the air flow temperature is very important, and through the operation of the dry dedusting system, the inlet temperature of the deduster is controlled to be optimal at 120-140 ℃, so that the air flow can be ensured to contain certain water vapor, the air flow can be ensured not to be condensed in the deduster, the aggravation of discharge times in an electric field can not be caused, dust can not be caused, and equipment in the electric field can not be damaged.
The dry method and the semi-dry method are both evaporation cooling mechanisms (saturation cooling mechanisms are adopted in wet dedusting), the heat of the smoke is absorbed by utilizing the latent heat of water evaporation to realize the cooling of the smoke, the theoretical evaporation latent heat of each kilogram of water is 2093kJ (the saturation cooling mechanisms are used for realizing the cooling by spraying water in a large quantity, the heat of the smoke is absorbed by water heating, the theoretical heat absorption of each kilogram of water is 209.34 kJ), and the cooling is just 10 times of that of the saturated cooling, so that the water quantity required for cooling the same smoke is 1/10 of that of the saturated cooling.
Compared with the wet method, the dry method has the following advantages: (1) the dust removal efficiency is high, and the dust concentration is reduced to less than or equal to 10-20 mg/m; (2) the system has no secondary pollution and sewage treatment; (3) the system has small resistance loss, high gas heat value and low energy consumption; (4) the system is simplified, the occupied area is small, and the management and the maintenance are convenient.
Although the technology of the converter primary flue gas dry dedusting process is mature so far, the dust content of coal gas and the dust content of diffused flue gas can be completely reduced to very low levels, a series of unresolved serious problems exist from the modern technological point of view:
1. the dry dust removal always has high risk of gas explosion, and the electrostatic dust remover cannot avoid the problem of electric field high-voltage flashover, so that the explosion venting of the electrostatic dust remover is caused. In the actual production and operation process of the converter primary flue gas dry-method electrostatic dust removal system, the problem of explosion unloading and the problem of smoking frequently occur, so that the converter primary flue gas dry-method dust removal system often cannot ensure that the flue gas emission stably reaches the standard;
2. the dry dedusting system adopts an evaporative cooling mechanism, so that the recovered gas contains a lot of water vapor, and the gas pipeline and equipment have a certain corrosion problem;
3. the dry dust removal system adopts an evaporative cooling mechanism, so that the smoke containing a lot of water vapor is discharged, and the smoke plume problem of the discharged smoke is more remarkable.
Disclosure of Invention
Aiming at the defects, the inventor carries out research and improvement and provides a dry electric bag combined dust removal system for eliminating smoke plume by ultralow emission of primary smoke of a converter.
The technical scheme adopted by the application is as follows:
the dry electric bag combined dust removal system for eliminating smoke plumes by ultra-low emission of primary smoke of the converter is characterized in that the converter is connected with a vaporization cooling flue, the vaporization cooling flue is connected with an evaporative cooler, the evaporative cooler is sequentially connected with an electrostatic dust collector, a multi-tube type anti-deflagration flame arrester, a pulse cloth bag dust remover, a smoke plumping elimination device, a fan, a switching station and a chimney through a smoke pipeline, the switching station is further connected with a gas tank, the electrostatic dust collector, the multi-tube type anti-deflagration flame arrester and the pulse cloth bag dust remover are all connected with a pneumatic ash conveying system, the pneumatic ash conveying system is connected with a compressed nitrogen gas source, and the compressed nitrogen gas source is further connected with the evaporative cooler, the multi-tube type anti-deflagration flame arrester and the pulse cloth bag dust remover.
A temperature transmitter and a flue gas O-containing device are arranged on a flue gas pipeline between the evaporative cooler and the electrostatic precipitator 2 Measuring device for amount of H contained in flue gas 2 The device comprises a measuring device, a measuring device for the CO content of the flue gas and a pressure transmitter.
The multi-tube deflagration-preventing flame arrester comprises a smoke inlet air chamber and a smoke outlet air chamber, wherein a plurality of fine smoke exhaust pipes are connected between the smoke inlet air chamber and the smoke outlet air chamber, fire retarding elements are arranged inside one end of each fine smoke exhaust pipe close to the smoke inlet air chamber, the smoke inlet air chamber and the smoke outlet air chamber are respectively connected with a smoke inlet interface and a smoke outlet interface, and the lower end of the smoke inlet air chamber is connected with a pneumatic ash conveying system through an ash pipe.
And a blowing ash removing device is arranged above the fire retarding element in the fine smoke exhaust pipe and is connected with a compressed nitrogen source through the fine smoke exhaust pipe.
And a smoke pipeline between the multi-pipe type deflagration-preventing flame arrester and the pulse bag-type dust collector and a heat tracing and heat preserving device for keeping the temperature of smoke are arranged in the pulse bag-type dust collector.
And explosion venting valves are arranged on the multi-pipe type explosion-proof flame arrester and the pulse bag-type dust collector.
The smoke plume eliminating device comprises a shell, a circulating condensation pipe is arranged in the shell, the circulating condensation pipe extends into a chimney, and a demister is further arranged in the shell of the smoke plume eliminating device.
The compressed nitrogen source is connected with the pneumatic ash conveying system, the evaporative cooler, the multi-pipe anti-deflagration flame arrester and the pulse bag-type dust remover through the compressed nitrogen heating device.
The pneumatic ash conveying system is provided with a heat tracing and heat preserving device.
The beneficial effects of the application are as follows:
1) The front side of the pulse bag-type dust collector is provided with the multi-tube type anti-deflagration flame arrester, so that deflagration mixed gas entering the pulse bag-type dust collector can be prevented from deflagrating, impacting the bag of the pulse bag-type dust collector or scalding the bag of the pulse bag-type dust collector, the explosion and fire stopping effects are achieved on the possible deflagration, and meanwhile, the flue gas entering the pulse injection bag-type dust collector is cooled;
2) The smoke pipeline between the multi-pipe deflagration-preventing flame arrester and the pulse bag-type dust collector are internally provided with heat tracing and heat preserving devices for keeping the temperature of smoke, so that the temperature of the smoke is kept, and the condensation in the pulse bag-type dust collector is prevented;
3) The pulse bag-type dust collector is provided with an explosion-unloading valve, an explosion-proof structure is designed in the pulse bag-type dust collector, some possible vortex dead angle areas of the pulse bag-type dust collector and the bottom of the ash bucket are provided with compressed nitrogen purging devices, and the nitrogen is used for purging air possibly remained, so that the explosion-proof effect of the pulse bag-type dust collector is achieved;
4) The back end of the pulse bag dust collector is connected with a smoke plume eliminating device, the smoke is cooled through a circulating condensing pipe, so that water vapor in the smoke is condensed through a demister, the water vapor in the smoke is eliminated, the corrosiveness of recovered gas to pipelines and equipment is reduced, and meanwhile, the smoke plume problem of the discharged smoke is effectively eliminated;
5) A temperature transmitter and a flue gas O-containing device are arranged on a flue gas pipeline between the evaporative cooler and the electrostatic precipitator 2 Measuring device for amount of H contained in flue gas 2 The device comprises a measuring device, a measuring device for the CO content of the flue gas and a pressure transmitter, wherein nitrogen is injected into the flue through a compressed nitrogen source when the working condition is abnormal according to the measured technological parameters and the automatic control program of the system, so that the deflagration of the flue gas is avoided.
6) The concentrated phase positive pressure pneumatic ash conveying system sending device with the heat tracing heat preservation device adopts preheated compressed nitrogen to send ash in each ash bucket to an ash warehouse, so as to avoid the problem of secondary pollution of ash conveying, and the compressed nitrogen for conveying is preheated and the heat tracing heat preservation device is additionally arranged on the pneumatic ash conveying system, so that unstable system operation caused by dew formation in the operation process of the pneumatic ash conveying system is avoided
Drawings
Fig. 1 is a connection schematic diagram of a dry-method electric bag combined dust removal system for eliminating smoke plume through ultralow emission of primary smoke of a converter.
Fig. 2 is a schematic diagram of a multi-tube type deflagration-preventing fire-retarding structure of a dry electric bag combined dust-removing system for eliminating smoke plume with ultra-low emission of primary smoke of a converter.
Fig. 3 is an enlarged view at fig. 2A.
In the figure: 1. a converter; 2. an evaporative cooler; 3. an electrostatic precipitator; 4. multitube deflagration-preventing flame arresters; 41. a smoke inlet chamber; 411. a smoke inlet port; 42. a smoke exhaust air chamber; 421. a smoke discharging interface; 43. a fine smoke exhaust pipe; 44. a fire retardant element; 5. a pulse cloth bag dust collector; 6. a smoke plume eliminating device; 61. a circulating condensing tube; 62. a demister; 7. a blower; 8. a switching station; 9. a chimney; 10. a pneumatic ash conveying system; 11. a temperature transmitter; 12. flue gas containing O 2 A quantity measuring device; 13. the flue gas contains H 2 A quantity measuring device; 14. a device for measuring the CO content of the flue gas; 15. a pressure transmitter; 16. blowing ash removing device; 17. a heat tracing and preserving device; 18. explosion venting valve; 19. compressed nitrogen heating device.
Detailed Description
As shown in fig. 1 to 3, in the dry-method electric-bag combined dust removal system for eliminating smoke plumes by ultralow emission of primary flue gas of the converter in the embodiment, the converter 1 is connected with a vaporization cooling flue through a movable smoke hood and a cover skirt, the vaporization cooling flue is connected with an evaporative cooler 2, the evaporative cooler 2 is sequentially connected with an electrostatic precipitator 3, a multi-tube deflagration-preventing flame arrester 4, a pulse cloth bag dust collector 5, a smoke plumes eliminating device 6, a fan 7, a switching station 8 and a chimney 9 through flue gas pipelines, and the switching station 8 is also connected with a gas cabinet;
the tail end of the evaporative cooler 2 is connected with a compressed nitrogen source through a compressed nitrogen heating device 19;
the lower end of the electrostatic precipitator 3 is connected with a pneumatic ash conveying system 10, and the pneumatic ash conveying system 10 is connected with a compressed nitrogen source through a compressed nitrogen heating device 19;
the multi-pipe type deflagration-preventing flame arrester 4 comprises a smoke inlet chamber 41 and a smoke exhaust chamber 42, a plurality of fine smoke exhaust pipes 43 made of steel pipes are connected between the smoke inlet chamber 41 and the smoke exhaust chamber 42, fire retarding elements 44 are arranged inside one end of each fine smoke exhaust pipe 43 close to the smoke inlet chamber 41, the smoke inlet chamber 41 and the smoke exhaust chamber 42 are respectively connected with a smoke inlet port 411 and a smoke exhaust port 421, the lower end of the smoke inlet chamber 41 is connected with a pneumatic ash conveying system 10 through a dust pipe, the pneumatic ash conveying system 10 is connected with a compressed nitrogen gas source through a compressed nitrogen gas heating device 19, the bottom of the dust pipe is provided with a blowing ash removing device 16 connected with the compressed nitrogen gas source through the compressed nitrogen gas heating device 19, collected ash in the ash pipes of the multi-pipe type deflagration-preventing flame arrester 4 can be sent into the pneumatic ash conveying system 10, ash is discharged, the fine smoke exhaust pipes 43 are positioned above the fire retarding elements 44, the blowing ash removing device 16 penetrates through the fine smoke exhaust pipes 43 and is connected with the compressed nitrogen gas source through the compressed nitrogen gas heating device 19, the fire retarding elements 44 can be prevented from being blocked by the fire retarding elements 44, and the pressure relieving pressure relief valves 18 can be guaranteed when the pressure relief valves 18 are arranged at the upper ends of the smoke exhaust chambers.
The heat tracing and heat preserving device 17 is arranged on a smoke exhaust pipeline between the multi-pipe deflagration-prevention flame arrester 4 and the pulse bag-type dust collector 5 and in the pulse bag-type dust collector 5, the heat tracing and heat preserving device 17 can keep the temperature of smoke, the smoke is prevented from dewing in the pulse bag-type dust collector 5 due to the too low temperature, an ash bucket at the lower end of the pulse bag-type dust collector 5 is also connected with the pneumatic ash conveying system 10, the pneumatic ash conveying system 10 is connected with a compressed nitrogen gas source through the compressed nitrogen gas heating device 19, the bottom of the ash bucket is provided with the blowing ash removing device 16 connected with the compressed nitrogen gas source through the compressed nitrogen gas heating device 19, and collected ash in the ash bucket of the pulse bag-type dust collector 5 can be sent into the pneumatic ash conveying system 10 to realize ash discharge;
the explosion venting valve 18 is also connected to pulse sack cleaner 5 upper end, can guarantee to take place the quick pressure release when deflagrating, and this pulse sack cleaner 5 designs into explosion-proof structural style (if the panel sets up the swash plate structure with the dust remover barrel intersection bight region, eliminate dead angle region), in addition some possible vortex dead angle regions of this pulse sack cleaner 5 also set up the jetting ash removal device 16, this jetting ash removal device 16 also connects compressed nitrogen gas source through compressed nitrogen gas heating device 19, can discharge the air in the vortex dead angle region through the nitrogen gas that jets out of jetting ash removal device 16, the realization pulse sack cleaner 5 explosion-proof of maximum speed limit.
The pressure difference transmitter is arranged between the smoke inlet pipeline and the smoke outlet pipeline of the pulse bag dust collector 5, so that the pressure difference at two ends can be detected, the blocking condition of a bag is detected, if the pressure difference is too large, the blocking condition of the bag is severe, compressed nitrogen generated by a compressed nitrogen source is heated by the compressed nitrogen heating device 19 and then is sent into the pulse bag dust collector 5, the bag is backwashed, and ash blocked on the bag is discharged and falls into an ash bucket to be collected.
The compressed nitrogen generated by the compressed nitrogen source is heated by the compressed nitrogen heating device 19 to increase the temperature of the compressed nitrogen, so that dew condensation in a compressed nitrogen supply pipe is prevented, and the pneumatic ash conveying system 10 is also provided with the heat tracing heat preservation device 17, so that the temperature in the pneumatic ash conveying system 10 is ensured, and dew condensation in the pneumatic ash conveying system 10 is prevented.
The smoke abatement device 6 comprises a shell, wherein a circulating condensation pipe 61 is arranged in the shell, the circulating condensation pipe 61 extends into the chimney 9, condensate in the circulating condensation pipe 61 absorbs the temperature of smoke in the shell of the smoke abatement device 6, the temperature of the smoke is reduced, meanwhile, water vapor in the smoke is condensed, condensate in the circulating condensation pipe 61 circulates into the chimney 9 and exchanges heat with low-temperature smoke exhausted from the inside and outside of the chimney 9, the temperature of the condensate is reduced, a demister 62 is further arranged in the shell of the smoke abatement device 6, water mist in the smoke is further removed, water vapor in the smoke is eliminated, the corrosiveness of recovered gas to pipelines and equipment is reduced, and meanwhile, the smoke abatement problem of the diffused smoke is effectively eliminated.
A temperature transmitter 11 and a flue gas O-containing device are arranged on a flue gas pipeline between the evaporative cooler 2 and the electrostatic precipitator 3 2 Measuring device 12 and H content of flue gas 2 The measuring device 13, the measuring device 14 for the CO content of the flue gas and the pressure transmitter 15 are arranged under the working conditionDuring abnormal conditions, nitrogen can be blown into the evaporative cooler 2, the electrostatic precipitator 3, the multi-tube type anti-deflagration flame arrester 4 and the pulse bag-type dust collector 5 through a compressed nitrogen source, so that deflagration of smoke is avoided.
When the dry-method electric bag combined dust removal system for eliminating smoke plume by using the converter primary smoke ultralow emission of the embodiment is used, the method comprises the following steps of:
1) Flue gas generated by the converter has the temperature range of 1450-1650 ℃, is collected through the movable smoke cover and the cover skirt, enters the vaporization cooling flue to be primarily vaporized and cooled, and the temperature range of the flue gas at the outlet of the vaporization cooling flue is 800-1000 ℃;
2) Then enters an evaporative cooler 2 to further cool the flue gas;
3) The flue gas enters the electrostatic precipitator 3 for electrostatic dust removal, the temperature range of the flue gas at the inlet of the electrostatic precipitator 3 is 150-180 ℃, the temperature range at the outlet is 140-170 ℃, and ash materials generated by the electrostatic precipitator 3 are sent out through the pneumatic ash conveying system 10;
4) After electrostatic dust removal, the flue gas enters the multi-pipe type anti-deflagration flame arrester 4, the flame arrester element 44 arranged on the fine smoke exhaust pipe 43 plays a role in preventing possible deflagration and fire, meanwhile, the fine smoke exhaust pipe 43 enlarges the heat exchange area of the flue gas, so that the flue gas is further cooled, ash materials collected in the multi-pipe type anti-deflagration flame arrester 4 enter an ash bucket, and the ash is sent into the pneumatic ash conveying system 10 through the blowing ash removing device 16 arranged at the bottom of the ash bucket to be sent out;
5) The flue gas is cooled by fire resistance, then is sent into a pulse bag-type dust collector 5 through a flue gas pipeline, the temperature of the flue gas entering the pulse bag-type dust collector 5 is kept at 130-160 ℃ through heat preservation and heating of a heat tracing heat preservation device 17 on the flue gas pipeline, the flue gas is subjected to bag-type dust collection in the pulse bag-type dust collector 5, ash materials are collected in the pulse bag-type dust collector 5 and enter an ash bucket, and the ash materials are sent into a pneumatic ash conveying system 10 through an injection ash removing device 16 arranged at the bottom of the ash bucket and are sent out;
6) After the bag dust removal is finished, the smoke enters a smoke plume removing device 6, water vapor in the smoke is condensed by a circulating condensing pipe 61, water mist is removed by a demister 62, the water vapor in the smoke is removed, the temperature of the smoke is further reduced, the smoke plume removing device 6 enters the smoke temperature range of 120-150 ℃, and the temperature range of the smoke outlet is not more than 55 ℃;
7) The fan 7 sends the flue gas discharged by the flue gas elimination device 6 into the switching station 8, the gas in the flue gas is sent to the gas tank for collection through the switching of the switching station 8, other flue gas is discharged through the chimney 9, and when the flue gas is discharged through the chimney 9, the flue gas exchanges heat with condensate in the circulating condensation pipe 61, so that the temperature of the condensate can be reduced.
The above description is illustrative of the application and not limiting, the scope of the application being defined by the appended claims, which may be modified in any manner without departing from the basic structure of the application.
Claims (4)
1. The dry electric bag combined dust removal system for eliminating smoke plume by ultralow emission of primary smoke of a converter is characterized in that: the converter (1) is connected with a vaporization cooling flue, the vaporization cooling flue is connected with an evaporative cooler (2), the evaporative cooler (2) is sequentially connected with an electrostatic precipitator (3), a multi-tube type anti-explosion flame arrester (4), a pulse cloth bag dust collector (5), a smoke plume eliminating device (6), a fan (7), a switching station (8) and a chimney (9) through a smoke pipeline, the switching station (8) is further connected with a gas tank, the electrostatic precipitator (3), the multi-tube type anti-explosion flame arrester (4) and the pulse cloth bag dust collector (5) are all connected with a pneumatic ash conveying system (10), the pneumatic ash conveying system (10) is connected with a compressed nitrogen gas source, the compressed nitrogen gas source is also connected with the evaporative cooler (2), the multi-tube type anti-explosion flame arrester (4) and the pulse cloth bag dust collector (5), and a temperature transmitter (11), smoke O-containing gas are arranged on the smoke pipeline between the evaporative cooler (2) and the electrostatic precipitator (3) 2 Measuring device (12) for measuring H content in flue gas 2 The multi-tube deflagration-prevention flame arrester (4) comprises a smoke inlet air chamber (41) and a smoke exhaust air chamber (42), wherein a plurality of fine smoke exhaust pipes (43) are connected between the smoke inlet air chamber (41) and the smoke exhaust air chamber (42), and the fine smoke exhaust pipes are arranged between the smoke inlet air chamber (41) and the smoke exhaust air chamber (42)The pipe (43) is close to and advances smoke chamber (41) one end inside and all sets up fire suppression component (44), advance smoke chamber (41) and smoke chamber (42) and connect respectively and advance cigarette interface (411) and smoke interface (421), advance smoke chamber (41) lower extreme and connect pneumatic ash conveying system (10) through the ash bucket, be located fire suppression component (44) top in thin smoke tube (43) and set up jetting ash removal device (16), jetting ash removal device (16) pass thin smoke tube (43) and connect compressed nitrogen gas source, flue gas pipeline between multitube formula explosion-proof flame arrester (4) and pulse sack cleaner (5) and all set up heat preservation device (17) that keep flue gas temperature in pulse sack cleaner (5), multitube formula explosion-proof flame arrester (4) with all set up on pulse sack cleaner (5) and let out explosion valve (18).
2. The dry electric bag combined dust removal system for eliminating smoke plume by ultra-low emission of primary smoke of a converter according to claim 1, which is characterized in that: the smoke plume eliminating device (6) comprises a shell, a circulating condensation pipe (61) is arranged in the shell, the circulating condensation pipe (61) extends into a chimney (9), and a demister (62) is further arranged in the shell of the smoke plume eliminating device (6).
3. The dry electric bag combined dust removal system for eliminating smoke plume by ultra-low emission of primary smoke of a converter according to claim 1, which is characterized in that: the compressed nitrogen source is connected with the pneumatic ash conveying system (10), the evaporative cooler (2), the multi-tube anti-deflagration flame arrester (4) and the pulse bag-type dust collector (5) through the compressed nitrogen heating device (19).
4. The dry electric bag combined dust removal system for eliminating smoke plume by ultra-low emission of primary smoke of a converter according to claim 1, which is characterized in that: the pneumatic ash conveying system (10) is provided with a heat tracing and heat preserving device (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910648725.4A CN110184409B (en) | 2019-07-18 | 2019-07-18 | Dry-method electric bag combined dust removal system for eliminating smoke plume by ultralow emission of primary flue gas of converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910648725.4A CN110184409B (en) | 2019-07-18 | 2019-07-18 | Dry-method electric bag combined dust removal system for eliminating smoke plume by ultralow emission of primary flue gas of converter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110184409A CN110184409A (en) | 2019-08-30 |
| CN110184409B true CN110184409B (en) | 2023-12-05 |
Family
ID=67725783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910648725.4A Active CN110184409B (en) | 2019-07-18 | 2019-07-18 | Dry-method electric bag combined dust removal system for eliminating smoke plume by ultralow emission of primary flue gas of converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110184409B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111575435B (en) * | 2020-06-22 | 2023-11-03 | 无锡红旗除尘设备有限公司 | Primary dry dedusting system and method for ultra-clean gas recovery converter |
| CN113203048B (en) * | 2021-03-25 | 2022-07-22 | 宣化钢铁集团有限责任公司 | Safe liquid drainage device and method for gas system at inlet and outlet of aspirator |
| CN116673126B (en) * | 2023-08-03 | 2024-02-02 | 南京恒瑞环保科技有限公司 | Explosion-proof dry electrostatic precipitator and filter cartridge precipitator combined dust removal system and method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4505724A (en) * | 1982-04-24 | 1985-03-19 | Metallgesellschaft Aktiengesellschaft | Wet-process dust-collecting apparatus especially for converter exhaust gases |
| CN104404198A (en) * | 2014-10-20 | 2015-03-11 | 无锡泓成环境科技有限公司 | Control method for converter one-time dry method dedusting evaporating cooling tower crude ash pneumatic conveying system under full-working condition |
| CN107034335A (en) * | 2017-05-18 | 2017-08-11 | 中冶节能环保有限责任公司 | A kind of process system and method to ultra-clean dedusting of flue gas of converter |
| CN208694296U (en) * | 2018-12-06 | 2019-04-05 | 北京美斯顿科技开发有限公司 | A kind of system for eliminating the white plume of industry |
| CN109913614A (en) * | 2019-02-01 | 2019-06-21 | 无锡红旗除尘设备有限公司 | A kind of minimum discharge cleaning treatment system of dry method dust release flue gas of converter |
| CN210176892U (en) * | 2019-07-18 | 2020-03-24 | 无锡红旗除尘设备有限公司 | Dry electric bag combined dust removal system for eliminating smoke plume by ultra-low emission of primary smoke of converter |
-
2019
- 2019-07-18 CN CN201910648725.4A patent/CN110184409B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4505724A (en) * | 1982-04-24 | 1985-03-19 | Metallgesellschaft Aktiengesellschaft | Wet-process dust-collecting apparatus especially for converter exhaust gases |
| CN104404198A (en) * | 2014-10-20 | 2015-03-11 | 无锡泓成环境科技有限公司 | Control method for converter one-time dry method dedusting evaporating cooling tower crude ash pneumatic conveying system under full-working condition |
| CN107034335A (en) * | 2017-05-18 | 2017-08-11 | 中冶节能环保有限责任公司 | A kind of process system and method to ultra-clean dedusting of flue gas of converter |
| CN208694296U (en) * | 2018-12-06 | 2019-04-05 | 北京美斯顿科技开发有限公司 | A kind of system for eliminating the white plume of industry |
| CN109913614A (en) * | 2019-02-01 | 2019-06-21 | 无锡红旗除尘设备有限公司 | A kind of minimum discharge cleaning treatment system of dry method dust release flue gas of converter |
| CN210176892U (en) * | 2019-07-18 | 2020-03-24 | 无锡红旗除尘设备有限公司 | Dry electric bag combined dust removal system for eliminating smoke plume by ultra-low emission of primary smoke of converter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110184409A (en) | 2019-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110184409B (en) | Dry-method electric bag combined dust removal system for eliminating smoke plume by ultralow emission of primary flue gas of converter | |
| CN101570807B (en) | Steel converter coal gas purification and waste heat recycling system | |
| CN110184411B (en) | Full-dry dedusting system for converter primary flue gas high-efficiency energy-saving ultra-clean emission | |
| CN201485480U (en) | Converter flue gas waste heat recovery and purifying dedusting device | |
| CN213388753U (en) | Converter pure dry dedusting system integrating high temperature constant temperature, high temperature purification and waste heat recovery | |
| CN112877499B (en) | Converter flue gas treatment system based on dry dedusting and operation method thereof | |
| CN110184410B (en) | Dry dust removal system for ultralow emission of primary flue gas and smoke plume elimination of converter | |
| CN103255260A (en) | Converter flue gas purifying and waste heat recovering system and bag-type dust removing technology | |
| CN210176894U (en) | Dry dedusting system for converter primary flue gas ultralow emission and smoke plume elimination | |
| CN106996577A (en) | A kind of block-resistant type air preheater step-by-step arrangement system | |
| CN101851695A (en) | Dry bag-type coal gas purifying and recycling process for oxygen-resistant converter | |
| CN206771420U (en) | A kind of block-resistant type air preheater step-by-step arrangement system | |
| CN216192462U (en) | Converter dry dedusting and smoke discharging system | |
| CN111575435B (en) | Primary dry dedusting system and method for ultra-clean gas recovery converter | |
| CN201411468Y (en) | Converter gas purification and afterheat recovery system for steelmaking | |
| CN210176895U (en) | Full-dry dedusting system for efficient energy-saving ultra-clean emission of primary flue gas of converter | |
| CN201850285U (en) | Dry dust-collecting system for converter | |
| CN210176892U (en) | Dry electric bag combined dust removal system for eliminating smoke plume by ultra-low emission of primary smoke of converter | |
| CN207270943U (en) | A kind of cooperative control system of coal steam-electric plant smoke flue dust | |
| CN113005257A (en) | Converter flue gas treatment system and operation method thereof | |
| CN212560337U (en) | Converter primary dry dedusting system for recycling ultra-clean coal gas | |
| CN213388752U (en) | Primary pure dry dedusting system of converter integrating full waste heat recovery and stable fine purification | |
| CN213388754U (en) | Converter pure dry dedusting system integrating high constant temperature filtration purification and waste heat recovery | |
| CN214612612U (en) | Converter flue gas treatment system | |
| CN214612611U (en) | Converter flue gas processing system based on dry dedusting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |