CN210176895U - Full-dry dedusting system for efficient energy-saving ultra-clean emission of primary flue gas of converter - Google Patents
Full-dry dedusting system for efficient energy-saving ultra-clean emission of primary flue gas of converter Download PDFInfo
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Abstract
The utility model relates to an energy-efficient ultra-clean emission's of converter primary flue gas dry dedusting system, the converter passes through vaporization cooling flue and connects heat pipe exhaust-heat boiler, vaporization cooling flue and heat pipe exhaust-heat boiler connect waste heat steam system, heat pipe exhaust-heat boiler passes through the flue gas pipeline and connects gradually multi-tubular anti-detonation flame arrester, pulse bag dust collector, fan, switching station and chimney, the switching station still is connected with the gas chamber, heat pipe exhaust-heat boiler, multi-tubular anti-detonation flame arrester and pulse bag dust collector all connect the strength ash conveying system, the strength ash conveying system connects the compressed nitrogen gas source, the compressed nitrogen gas source still with vaporization cooling flue, multi-tubular anti-detonation flame arrester and pulse bag dust collector are connected, the energy-efficient ultra-clean emission's of converter primary flue gas dry dedusting system realizes flue gas cooling and flue gas waste heat utilization, and full dry dedusting, pulse bag dust collector, reduce the corrosion of gas pipelines and equipment facilities and also avoid the problem of smoke plume of the diffused smoke.
Description
Technical Field
The utility model relates to a dust pelletizing system especially relates to a full dry process dust pelletizing system of converter flue gas energy-efficient ultra-clean emission.
Background
Converter steelmaking has become the main steelmaking process of steel enterprises, and a converter generates gas containing carbon monoxide as a main component, a small amount of carbon dioxide and other trace components in the blowing process, and a large amount of iron oxide, metal iron particles and other fine particle solid dust are carried in the gas, so that the pollution to the atmosphere and the workshop environment is serious. Therefore, the problem to be solved at present is to improve the technical level of the converter dust removal system and effectively control and reduce the emission of the atmospheric pollutants in steel making.
The steel industry in China is in the period of structure adjustment and optimization upgrading, faces increasingly severe resource and environmental pressure, and has to go through resource-saving and environment-friendly sustainable development. The recovery and the good utilization of the converter gas have great significance for saving energy, reducing consumption and reducing environmental pollution in steelmaking.
The temperature of the converter flue gas outlet is about 1400-1600 ℃, and the dust concentration is 70-200 g/m3After leaving the furnace mouth, the gas is cooled to 800-1000 ℃ by 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, the primary flue gas dust removal system of the 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 method dust removal system adopts a wet treatment process, and the technology has the defects that the dust content of the coal gas treated by ① is high and cannot reach less than or equal to 10mg/m3If the coal gas is used, an electric dust collector is arranged at the rear part of the coal gas for fine dust removal, and the dust content mass concentration of the coal gas is reduced to be less than or equal to 10mg/m 3② system with secondary pollution and ③ system with high resistance, high power consumption and small occupied areaIs large. With the improvement of national energy conservation and emission reduction requirements, the traditional OG dust removal system cannot meet the requirements.
(2) The novel OG method dust pelletizing system is improved on the basis of the traditional OG method dust pelletizing system. The technology has the characteristics of simple flow, less unit equipment, small resistance loss and the like. The second sentence adopts RSW technology (namely, the throat-adjustable second sentence 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 emission concentration is reduced, but the circulating water amount is not greatly reduced, and the dust cleaning period of the fan impeller is not prolonged.
(3) The semi-dry process dust-removing system adopts spray dust-removing process on the basis of adopting dry evaporation cooling technology, and its dust-removing process has the advantages of that ① system resistance is reduced, and can ensure that dust discharge is less than or equal to 50mg/m3Or 1-2 kWh of electricity is saved per ton of steel, ② circulating water amount is reduced by 50%, and the maintenance period of the ③ fan is prolonged.
(4) The dry converter dedusting is developed cooperatively by foreign companies in the end of the 20 th century and the 60 th era. The basic principle of dry dedusting of the converter is that high-temperature coal gas passing through a vaporization flue is cooled by spraying water, the temperature of the coal gas is reduced from 800-1000 ℃ to about 200 ℃, and an electric precipitator is used for treatment. The converter dry dedusting system mainly comprises: evaporative coolers, electrostatic precipitators, gas switching, gas coolers, blow-off chimneys, ash removal systems, and the like. The most outstanding advantages are as follows: the dust content of the purified smoke is 10mg/Nm3～20mg/Nm3If special requirements are met, the concentration can be reduced to 5mg/Nm3。
The core of the dry dedusting is temperature control, including the temperature of an inlet and an outlet of an EC (evaporative cooler) and the temperature of an inlet and an outlet of an EP (electrostatic precipitator), how to ensure the temperature control is the premise of ensuring the normal operation of a dry dedusting system, and the basis of the temperature control is to ensure that the phenomenon of airflow condensation does not occur in an electric field of the EP, so that the phenomenon of humidity does not occur in the electric field, and the adsorbed dust is dry and not humid. If the temperature of the air flow is too low, the generated dust is hardened, so that the blockage of an EC coarse dust conveying system and an EP fine dust conveying system is caused, wet dust is easily hung on a cathode wire and an anode plate and is not easy to fall down, the cathode wire is enlarged, the polar distance is reduced, the discharge frequency of an electric field is increased, the explosion discharge is easily caused, the dust removal efficiency of a dust remover is influenced, the corrosion of equipment in the electric field is aggravated, and the service life of the equipment is shortened; in addition, the phenomenon of water accumulation in the fan is caused due to the over-low temperature of the airflow, and the corrosion speed of the fan impeller is increased; however, the excessive temperature of the airflow will cause additional burning loss of the equipment, and reduce the dust removal effect of the electric field.
Therefore, for dry dedusting, the control of the air flow temperature is very important, through the operation of a dry dedusting system, the inlet temperature of the deduster is controlled to be optimal at 120-140 ℃, certain water vapor can be contained in the air flow at the moment, the air flow is guaranteed not to be condensed in the deduster, the aggravation of the discharge times in an electric field is avoided, the humidity of dust is avoided, and the equipment in the electric field is also guaranteed not to be damaged.
The dry method and the semi-dry method both adopt an evaporation cooling mechanism (while wet dust removal adopts a saturated cooling mechanism), the latent heat of water evaporation is utilized to absorb the heat of the flue gas to realize the cooling of the flue gas, theoretically, the latent heat of evaporation per kilogram of water is 2093kJ (while the saturated cooling mechanism absorbs the heat of the flue gas through water temperature rise through a large amount of water spray to realize the temperature reduction of the flue gas, theoretically, the heat absorption per kilogram of water is only 209.34kJ), and is just 10 times of that of saturated cooling, so that the water quantity required for cooling the same flue gas is 1/10 of saturated cooling.
Compared with the wet method, the dry method has the advantages of high ① dust removal efficiency and dust concentration reduced to less than or equal to 10-20 mg/m 3② the system has no secondary pollution and sewage treatment, ③ system has small resistance loss, high gas heat value and low energy consumption, ④ system is simplified, the occupied area is small, and the system is convenient to manage and maintain.
Although the technology development of the converter primary flue gas semi-dry method and dry dedusting process is mature so far, and the dust content of the gas and the dust content of the diffused flue gas can be completely reduced to a very low level, a series of major problems which cannot be solved exist from the viewpoint of modern science and technology:
1. a large amount of heat generated in the smelting process is discharged along with the flue gas, so that the environment is polluted, and the waste of resources is caused;
2. a large amount of water for evaporating and cooling the flue gas is needed;
3. the dry dedusting always has high danger of gas explosion, and the electrostatic deduster cannot avoid the problem of high-voltage flashover of an electric field, so that the explosion venting problem of the electrostatic deduster is caused. In the actual production and operation process of the converter primary flue gas dry electrostatic dust removal system, due to frequent explosion unloading problems and smoke generation problems, the converter primary flue gas dry electrostatic dust removal system can not always ensure stable and standard flue gas emission;
4. gas pipelines and equipment have corrosion problems to a certain extent;
5. the smoke plume problem of the diffused smoke is more prominent;
6. the requirements on operation and maintenance personnel are higher.
Energy conservation and emission reduction are the main subjects of the development of the current society, and the problems are to be solved and perfected urgently.
SUMMERY OF THE UTILITY MODEL
The applicant carries out research and improvement aiming at the defects and provides an all-dry dedusting system for high-efficiency energy-saving ultra-clean emission of primary flue gas of a converter.
The utility model discloses the technical scheme who adopts as follows:
a full-dry dedusting system for converter primary flue gas high-efficiency energy-saving ultra-clean emission is characterized in that a converter is connected with a vaporization cooling flue, the vaporization cooling flue is connected with a heat pipe waste heat boiler, the heat pipe waste heat boiler comprises a high-pressure evaporator, a coal economizer and a low-pressure steam device which are arranged from bottom to top in sequence, the evaporative cooling flue, the high-pressure evaporator, the coal economizer and the low-pressure steam device are connected with a waste heat water vapor system, the heat pipe waste heat boiler is sequentially connected with a multi-pipe type anti-detonation flame arrester, a pulse bag dust collector, a fan, a switching station and a chimney through a flue gas pipeline, the switching station is also connected with a gas cabinet, the heat pipe waste heat boiler, the multi-pipe type anti-detonation flame arrester and the pulse bag dust collector 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 vaporization cooling flue, the multi-tube type anti-detonation flame arrester and the pulse bag-type dust collector.
A temperature transmitter is arranged on a flue gas pipeline between the vaporization cooling flue and the heat pipe waste heat boiler, and the flue gas contains O2Quantity measuring device and flue gas containing H2The device comprises a quantity measuring device, a flue gas CO content measuring device and a pressure transmitter.
The waste heat steam system includes oxygen-eliminating device, water distribution header, high pressure steam pocket, low pressure steam pocket and heat accumulator, the softened water tank is connected to oxygen-eliminating device one side, and low pressure steam ware, economizer and high pressure evaporator are connected respectively through water distribution header to the opposite side, the low pressure steam pocket is connected to the low pressure steam ware other end, the oxygen-eliminating device is connected to the low pressure steam pocket, high pressure steam pocket is connected to the other end of economizer and high pressure evaporator, vaporization cooling flue and heat accumulator are still connected respectively to the high pressure steam pocket.
Heat pipe exhaust-heat boiler, multi-tubular anti-detonation flame arrester and pulse bag dust remover lower extreme all connect the defeated grey system of strength through the ash bucket, and the ash bucket bottom sets up clearly blows the device, heat pipe exhaust-heat boiler, multi-tubular anti-detonation flame arrester and pulse bag dust remover internal bit vortex blind angle region also set up clearly blows the device, and clearly blows the device and connect the compression nitrogen gas source.
The heat pipe waste heat boiler, the multi-pipe type anti-detonation flame arrester and the pulse bag dust remover as well as the flue gas pipeline between the heat pipe waste heat boiler and the multi-pipe type anti-detonation flame arrester are all provided with explosion venting valves.
The multi-tube type deflagration-proof flame arrester comprises a smoke inlet chamber and a smoke exhaust chamber, a plurality of thin smoke exhaust pipes are connected between the smoke inlet chamber and the smoke exhaust chamber, the thin smoke exhaust pipes are close to the inside of one end of the smoke inlet chamber and are provided with fire retardant elements, the smoke inlet chamber and the smoke exhaust chamber are respectively connected with a smoke inlet interface and a smoke exhaust interface, and the lower end of the smoke inlet chamber is connected with a pneumatic ash conveying system through an ash hopper.
And a blowing device is arranged above the fire retardant element in the fine smoke exhaust pipe, and the blowing device penetrates through the fine smoke exhaust pipe to be connected with a compressed nitrogen gas source.
The switching station is connected with a gas cabinet through a gas dry cooler.
The utility model has the advantages as follows:
1) the heat pipe waste heat boiler is adopted to replace an evaporative cooler, on the basis of cooling high-temperature flue gas, flue gas waste heat is fully utilized, moisture cannot be supplemented into the flue gas, full-dry dust removal is realized, the dust removal process requirement of the pulse bag-type dust remover is effectively met, the corrosion problem of a gas pipeline and equipment facilities is reduced to the maximum extent, and the problem of smoke plume of the diffused flue gas is thoroughly avoided.
2) The multi-tube type anti-detonation flame arrester is arranged on the front side of the pulse bag-type dust remover, so that deflagration of deflagration mixed gas entering the pulse bag-type dust remover can be prevented from impacting a bag of the pulse bag-type dust remover or burning the bag of the pulse bag-type dust remover, the possible deflagration can be prevented from explosion and fire retardance, and meanwhile, the smoke entering the pulse blowing bag-type dust remover can be cooled;
3) the dust removal system is provided with an explosion relief valve, and a cleaning and blowing device is also arranged in the areas, located at the dead corners of the vortex, in the heat pipe waste heat boiler, the multi-pipe type anti-detonation flame arrester and the pulse bag dust remover, so that the nitrogen is used for blowing away possibly remained air, the anti-detonation effect in the dust removal system is achieved, and the stable standard of the smoke emission is ensured;
4) a temperature transmitter is arranged on a flue gas pipeline between the vaporization cooling flue and the heat pipe waste heat boiler, and the flue gas contains O2Quantity measuring device and flue gas containing H2The device comprises a quantity measuring device, a flue gas CO content measuring device and a pressure transmitter, wherein nitrogen is blown into a flue through a compressed nitrogen source when the working condition is abnormal according to measured process parameters and a system automatic control program, so that the flue gas is prevented from deflagrating;
5) the switching station is connected with a gas cabinet through a gas dry cooler to ensure that the recovered gas meets the optimal temperature requirement of the recovered gas;
6) the heat pipe waste heat boiler, the multi-pipe type anti-detonation flame arrester and the pulse bag dust collector are all connected with a pneumatic ash conveying system, and compressed nitrogen is adopted to convey ash in each ash hopper to an ash warehouse, so that the problem of secondary pollution caused by ash conveying is avoided.
Drawings
FIG. 1 is a schematic connection diagram of a full-dry dedusting system for high-efficiency energy-saving ultra-clean emission of primary flue gas of a converter.
FIG. 2 is the connection schematic diagram of the heat pipe waste heat boiler, the evaporative cooling flue and the waste heat and water vapor system of the total dry dedusting system for the high-efficiency energy-saving ultra-clean emission of primary flue gas of the converter.
Fig. 3 is the utility model provides a structural schematic diagram of the full dry dedusting system multitubular deflagration-proof fire-retardant that converter flue gas is energy-efficient ultra-clean to be discharged once.
Fig. 4 is an enlarged view of fig. 3A.
In the figure: 1. a converter; 2. a vaporizing cooling flue; 3. a heat pipe waste heat boiler; 31. a high pressure evaporator; 32. a coal economizer; 33. a low pressure steamer; 4. a waste heat water vapor system; 41. a deaerator; 42. a water diversion header; 43. a high pressure steam drum; 44. a low pressure steam drum; 45. a heat accumulator; 5. a multi-tube deflagration-proof flame arrestor; 51. a smoke inlet chamber; 511. a smoke inlet port; 52. a flue gas exhaust chamber; 521. a smoke evacuation interface; 53. a thin smoke exhaust pipe; 54. a fire retardant element; 6. a pulse bag dust collector; 7. a fan; 8. switching stations; 9. a chimney; 10. a pneumatic ash conveying system; 11. a temperature transmitter; 12. flue gas containing O2A quantity measuring device; 13. flue gas containing H2A quantity measuring device; 14. a device for measuring the CO content in the flue gas; 15. a pressure transmitter; 16. a blowing device; 17. a gas dry cooler; 18. and (4) an explosion venting valve.
Detailed Description
As shown in fig. 1 to 4, in the full-dry dedusting system for high-efficiency energy-saving ultra-clean emission of primary flue gas of a converter, the converter 1 is connected with an evaporative cooling flue 2, the evaporative cooling flue 2 is connected with a heat pipe waste heat boiler 3, the heat pipe waste heat boiler 3 comprises a high-pressure evaporator 31, an economizer 32 and a low-pressure steam generator 33 which are sequentially arranged from bottom to top, the evaporative cooling flue 2, the high-pressure evaporator 31, the economizer 32 and the low-pressure steam generator 33 are connected with an exhaust heat water vapor system 4, the heat pipe waste heat boiler 3 is sequentially connected with a multi-pipe type explosion-proof flame arrester 5, a pulse bag dust collector 6, a fan 7, a switching station 8 and a chimney 9 through flue gas pipelines, the switching station 8 is further connected with a gas chamber, the heat pipe waste heat boiler 3, the multi-pipe type explosion-proof flame arrester 5 and the pulse bag dust collector 6 are all connected with a pneumatic ash conveying system, The multi-pipe type anti-detonation flame arrester 5 is connected with the pulse bag dust collector 6.
Because a large amount of dust is contained in primary flue gas of the converter 1, the heat pipe waste heat boiler 3 is provided with a gas shock wave ash removal device, and is started under the working condition without CO-containing flue gas, and strong shock waves generated by gas detonation are utilized to blow off ash attached to fins of an evaporator of the heat pipe waste heat boiler 3, wherein one part of the ash is taken away by the flue gas, and the other part of the ash falls into an ash hopper and is sent to an ash warehouse by a transmitter of a pneumatic ash conveying system 10 arranged below the ash hopper;
the waste heat water vapor system 4 comprises a deaerator 41, a water diversion header 42, a high pressure steam pocket 43, a low pressure steam pocket 44 and a heat accumulator 45, one side of the deaerator 41 is connected with a soft water tank, the other side of the deaerator 41 is respectively connected with the low pressure steam device 33, the economizer 32 and the high pressure evaporator 31 through the water diversion header 42, the other end of the low pressure steam device 33 is connected with the low pressure steam pocket 44, the low pressure steam pocket 44 is connected with the deaerator 41, the other ends of the economizer 32 and the high pressure evaporator 31 are connected with the high pressure steam pocket 43, the high pressure steam pocket 43 is also respectively connected with the vaporization cooling flue 2 and the heat accumulator 45, soft water and low pressure steam enter the deaerator 41 together to perform soft water deoxidization operation, the deaerated soft water is sent into the water diversion header 42 after deoxidization is completed, the deaerated soft water is respectively sent into the low pressure steam device 33, the economizer 32 and the high pressure evaporator 31 through the water diversion header 42, high-pressure steam or low-pressure steam is generated and is respectively sent into a high-pressure steam pocket 43 and a low-pressure steam pocket 44, the high-pressure steam in the high-pressure steam pocket 43 can also be respectively sent into the vaporization cooling flue 2 and the heat accumulator 45, the high-pressure steam entering the vaporization cooling flue 2 can exchange heat with flue gas in the vaporization cooling flue 2, the temperature of the high-pressure steam is further improved, and the heat accumulator 45 can utilize the high-pressure steam in the inlet air to store energy and can send the steam out.
Heat pipe exhaust-heat boiler 3, multitubular anti-detonation flame arrester 5 and 6 lower extremes of pulse bag dust collector all connect air force ash conveying system 10 through the ash bucket, and the ash bucket bottom sets up clearly blows device 16, can with in heat pipe exhaust-heat boiler 3, multitubular anti-detonation flame arrester 5 and the 6 ash buckets of pulse bag dust collector, the ash blows in and carries in the air force ash conveying system 10, adopts compression nitrogen gas to send the ash in each ash bucket to the ash storehouse, avoids the emergence of the secondary pollution problem that the ash was carried
Heat pipe exhaust-heat boiler 3, be located vortex blind spot region in multitubular anti-detonation flame arrester 5 and the pulse sack cleaner 6 and also set up clearly and blow device 16, it connects compressed nitrogen gas source to clearly blow device 16, blow away the air that probably persists with nitrogen gas, play the interior anti-detonation effect of dust pelletizing system, and heat pipe exhaust-heat boiler 3, on multitubular anti-detonation flame arrester 5 and the pulse sack cleaner 6 and heat pipe exhaust-heat boiler 3, all set up explosion venting valve 18 on the flue gas pipeline between multitubular anti-detonation flame arrester 5, even take place the also quick pressure release of detonation.
Multitube anti-detonation flame arrester 5 is including advancing flue gas chamber 51 and discharge fume chamber 52, advance and connect a plurality of thin pipes 53 of discharging fume between flue gas chamber 51 and the discharge fume chamber 52, thin pipe 53 of discharging fume is close to and all sets up back-fire relief component 54 in the flue gas chamber 51 one end inside, it sets up clear device 16 of blowing to lie in back-fire relief component 54 top in the thin pipe 53 of discharging fume, clear device 16 of blowing passes thin pipe 53 of discharging fume and connects the compressed nitrogen gas source, can sweep back-fire relief component 54 through clear device 16 of blowing, prevent that back-fire relief component 54 from blockking up, it connects into smoke interface 511 and smoke exhaust interface 521 respectively to advance flue gas chamber 51 and discharge fume chamber 52.
A pressure difference transmitter is arranged between the smoke inlet pipeline and the smoke outlet pipeline of the pulse bag-type dust collector 6, and can detect the pressure difference at the two ends, thereby detecting the blocking condition of the bag, if the pressure difference is too large, the blocking condition of the bag is serious, compressed nitrogen generated by a compressed nitrogen source is sent into the pulse bag-type dust collector 6, the bag is back flushed, ash materials blocked on the bag are discharged and fall into an ash hopper to be collected, and the ash materials are sent to an ash storehouse by a transmitter of a pneumatic ash conveying system 10 arranged below the bag
The switching station 8 is connected with a gas cabinet through a gas dry cooler 17, and the gas temperature can be reduced through the gas dry cooler 17, so that the recovered gas can meet the optimal recovered gas temperature requirement;
a temperature transmitter 11 is arranged on the flue gas pipeline between the vaporization cooling flue 2 and the heat pipe waste heat boiler 3, and the flue gas contains O2 Quantity measuring device 12, flue gas contain H2The quantity measuring device 13, the flue gas CO content measuring device 14 and the pressure transmitter 15 blow nitrogen into the flue by compressing a nitrogen gas source when the working condition is abnormal according to measured process parameters and a system automatic control program, so that the deflagration of the flue gas is avoided;
when the full-dry dedusting system for the converter primary flue gas high-efficiency energy-saving ultra-clean emission is used, the method comprises the following steps:
1) the temperature range of the flue gas generated by the converter is 1450-;
2) the flue gas enters a flue gas layer of the heat pipe waste heat boiler 3, and simultaneously the water diversion collection box 42 sends the deoxidized soft water into the low-pressure steam device 33, the coal economizer 32 and the high-pressure evaporator 31 respectively, so that heat exchange can be carried out with the flue gas entering the heat pipe waste heat boiler 3 to generate high-pressure steam or low-pressure steam, and the temperature of the flue gas is reduced;
3) the flue gas enters the multi-pipe type anti-detonation flame arrester 5, the smoke inlet temperature range of the multi-pipe type anti-detonation flame arrester 5 is 160 plus 180 ℃, the flue gas passes through the fire-retardant element 54 arranged on the fine smoke exhaust pipe 53 to play the roles of explosion prevention and fire retardance for possible detonation, meanwhile, the fine smoke exhaust pipe 53 enlarges the heat exchange area of the flue gas to further cool the flue gas, the ash collected in the multi-pipe type anti-detonation flame arrester 5 enters the ash hopper, and is sent into the pneumatic ash conveying system 10 through the blowing device 16 arranged at the bottom of the ash hopper to be sent out, and the ash is fed into the ash warehouse through the pneumatic ash conveying system 10;
4) after fire resistance and cooling, the flue gas is sent into a pulse bag-type dust collector 6 through a flue gas pipeline, the smoke inlet temperature range of the pulse bag-type dust collector 6 is 85-105 ℃, the flue gas is subjected to bag-type dust collection in the pulse bag-type dust collector 6, ash collected in the pulse bag-type dust collector 6 enters an ash hopper, is sent into a pneumatic ash conveying system 10 through a blowing device 16 arranged at the bottom of the ash hopper to be sent out, and is sent into an ash warehouse through the pneumatic ash conveying system 10;
5) the fan 7 sends the smoke discharged by the pulse bag-type dust collector 6 to the switching station 8, the switching station 8 switches to enable the coal gas to be sent to the coal gas cabinet for collection through the coal gas dry cooler 17, the temperature range of the coal gas inlet of the coal gas dry cooler 17 is 85-105 ℃, the temperature range of the coal gas outlet is not more than 65 ℃, and the switching station 8 discharges other smoke through the chimney 9.
The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made without departing from the basic structure of the invention.
Claims (8)
1. The full-dry dedusting system for the high-efficiency energy-saving ultra-clean emission of the primary flue gas of the converter is characterized in that: the converter (1) is connected with the vaporization cooling flue (2), the vaporization cooling flue (2) is connected with the heat pipe waste heat boiler (3), the heat pipe waste heat boiler (3) comprises a high-pressure evaporator (31), a coal economizer (32) and a low-pressure steam device (33) which are sequentially arranged from bottom to top, the vaporization cooling flue (2), the high-pressure evaporator (31), the coal economizer (32) and the low-pressure steam device (33) are connected with a waste heat water vapor system (4), the heat pipe waste heat boiler (3) is sequentially connected with a multi-pipe type deflagration-proof flame arrester (5), a pulse bag-type dust collector (6), a fan (7), a switching station (8) and a chimney (9) through a flue gas pipeline, the switching station (8) is further connected with the gas cabinet, and the heat pipe waste heat boiler (3), the multi-pipe type deflagration-proof flame arrester (5) and the pulse, the pneumatic ash conveying system (10) is connected with a compressed nitrogen gas source, and the compressed nitrogen gas source is further connected with the vaporization cooling flue (2), the multi-tube type anti-detonation flame arrester (5) and the pulse bag dust collector (6).
2. The full-dry dedusting system for the high-efficiency energy-saving ultra-clean emission of the primary flue gas of the converter according to claim 1, characterized in that: a temperature transmitter (11) is arranged on a flue gas pipeline between the vaporization cooling flue (2) and the heat pipe waste heat boiler (3), and the flue gas contains O2Amount measuring device (12), and flue gas containing H2The device comprises a quantity measuring device (13), a flue gas CO content measuring device (14) and a pressure transmitter (15).
3. The full-dry dedusting system for the high-efficiency energy-saving ultra-clean emission of the primary flue gas of the converter according to claim 1, characterized in that: waste heat steam system (4) are including oxygen-eliminating device (41), water distribution collection case (42), high pressure steam pocket (43), low pressure steam pocket (44) and heat accumulator (45), the soft water tank is connected to oxygen-eliminating device (41) one side, and low pressure steam ware (33), economizer (32) and high pressure evaporimeter (31) are connected respectively through water distribution collection case (42) to the opposite side, low pressure steam ware (33) other end connection low pressure steam pocket (44), oxygen-eliminating device (41) is connected in low pressure steam pocket (44), high pressure steam pocket (43) are connected to the other end of economizer (32) and high pressure evaporimeter (31), vaporization cooling flue (2) and heat accumulator (45) are still connected respectively in high pressure steam pocket (43).
4. The full-dry dedusting system for the high-efficiency energy-saving ultra-clean emission of the primary flue gas of the converter according to claim 1, characterized in that: heat pipe exhaust-heat boiler (3), multi-tubular anti-detonation flame arrester (5) and pulse bag dust remover (6) lower extreme all connect the defeated grey system of strength (10) through the ash bucket, and the ash bucket bottom sets up clearly blows device (16), it also sets up clearly and blows device (16) to lie in vortex blind angle region in heat pipe exhaust-heat boiler (3), multi-tubular anti-detonation flame arrester (5) and pulse bag dust remover (6).
5. The full-dry dedusting system for the high-efficiency energy-saving ultra-clean emission of the primary flue gas of the converter according to claim 1, characterized in that: the heat pipe waste heat boiler (3), the multi-tube type anti-detonation flame arrester (5) and the pulse bag dust collector (6) and the flue gas pipeline between the heat pipe waste heat boiler (3) and the multi-tube type anti-detonation flame arrester (5) are all provided with an explosion venting valve (18).
6. The system for removing dust in the converter primary flue gas by the full dry method with high-efficiency energy-saving ultra-clean emission according to any one of claims 1, 4 or 5, is characterized in that: multitube formula anti-detonation spark arrester (5) is including advancing flue gas chamber (51) and discharge fume chamber (52), advance flue gas chamber (51) and discharge fume between chamber (52) and connect a plurality of thin pipes (53) of discharging fume, thin pipe (53) of discharging fume is close to and advances inside fire retardant component (54) of all setting of flue gas chamber (51) one end, advance flue gas chamber (51) and discharge fume chamber (52) and connect respectively into smoke interface (511) and smoke interface (521), advance flue gas chamber (51) lower extreme and pass through the ash bucket and connect strength ash conveying system (10).
7. The system of claim 6, wherein the system comprises: and a cleaning and blowing device (16) is arranged above the fire retardant element (54) in the thin smoke exhaust pipe (53), and the cleaning and blowing device (16) penetrates through the thin smoke exhaust pipe (53) and is connected with a compressed nitrogen gas source.
8. The full-dry dedusting system for the high-efficiency energy-saving ultra-clean emission of the primary flue gas of the converter according to claim 1, characterized in that: the switching station (8) is connected with a gas cabinet through a gas dry cooler (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921137099.4U CN210176895U (en) | 2019-07-18 | 2019-07-18 | Full-dry dedusting system for efficient energy-saving ultra-clean emission of primary flue gas of converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921137099.4U CN210176895U (en) | 2019-07-18 | 2019-07-18 | Full-dry dedusting system for efficient energy-saving ultra-clean emission of primary flue gas of converter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110184411A (en) * | 2019-07-18 | 2019-08-30 | 无锡红旗除尘设备有限公司 | The full dry cloth-bag dusting system of the energy-efficient ultra-clean discharge of flue gas of converter |
| CN116949240A (en) * | 2023-09-14 | 2023-10-27 | 北京瑞达宏信科技有限公司 | Converter primary flue gas full dry dedusting, energy full recovery and CO zero emission system |
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- 2019-07-18 CN CN201921137099.4U patent/CN210176895U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110184411A (en) * | 2019-07-18 | 2019-08-30 | 无锡红旗除尘设备有限公司 | The full dry cloth-bag dusting system of the energy-efficient ultra-clean discharge of flue gas of converter |
| CN110184411B (en) * | 2019-07-18 | 2023-12-05 | 无锡红旗除尘设备有限公司 | Full-dry dedusting system for converter primary flue gas high-efficiency energy-saving ultra-clean emission |
| CN116949240A (en) * | 2023-09-14 | 2023-10-27 | 北京瑞达宏信科技有限公司 | Converter primary flue gas full dry dedusting, energy full recovery and CO zero emission system |
| CN116949240B (en) * | 2023-09-14 | 2024-03-19 | 北京瑞达宏信科技有限公司 | Converter primary flue gas full dry dedusting, energy full recovery and CO zero emission system |
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