CN213492933U - Device for recycling CO in sintered pellet waste gas - Google Patents
Device for recycling CO in sintered pellet waste gas Download PDFInfo
- Publication number
- CN213492933U CN213492933U CN202021933631.6U CN202021933631U CN213492933U CN 213492933 U CN213492933 U CN 213492933U CN 202021933631 U CN202021933631 U CN 202021933631U CN 213492933 U CN213492933 U CN 213492933U
- Authority
- CN
- China
- Prior art keywords
- flue
- gas
- ggh
- combustion
- waste gas
- 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
Images
Classifications
-
- 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
Landscapes
- Chimneys And Flues (AREA)
Abstract
The utility model discloses a recycle device of CO in sintering pelletizing waste gas can the interior CO of sintering pelletizing waste gas of reburning flue, and burning release heat energy relates to the outer exhaust-gas treatment technical field of sintering pelletizing machine. The device comprises an SCR reactor, wherein the SCR reactor comprises a GGH and a burner, the burner is arranged in a vertical flue at the side outlet of the raw flue gas of the GGH, and the burner bagIncluding the combustion head, the combustion head includes the horn mouth, the horn mouth orientation is unanimous with the interior airflow direction of flue, the combustor is the burning of igniteing in the flue, and high temperature when pipeline gas burning carries out the afterburning to the CO in the sintering pelletizing flue gas, turns into CO with CO and carries out the afterburning, becomes CO2CO after reaction2The flue gas is discharged after passing through the SCR reactor, and meanwhile, the fuel gas consumption required by the SCR denitration reactor in the sintering pellet flue gas treatment can be saved by 10-50% by utilizing a large amount of heat released by the reburning of CO.
Description
Technical Field
The utility model relates to an outer exhaust-gas treatment technical field of sintered pellet machine, especially a recycle device of CO in the sintered pellet waste gas.
Background
CO in the waste gas of the sintering (pelletizing) machine in the steel industry mainly comes from the combustion of coal powder and coke powder, and the CO enters the ambient air to cause environmental pollution and energy waste.
The discharged waste gas of some steel mill sintering (pelletizing) machines contains 2000-30000 mg/Nm3The CO and the CO are toxic gases, the high-concentration CO gas can cause acute and serious toxicity to human bodies, the waste gas of the sintering (pelletizing) machine is directly discharged out through a chimney in daily life and then naturally diffused through the atmosphere, and under some special weather conditions, the smoke gas sinks to cause personal harm to surrounding personnel.
From the actual operation condition of the sintering (pelletizing) machine, if a catalytic combustion method is adopted to recycle CO, a special catalyst needs to be used, the investment cost is high, the occupied area is large, the blockage is easy, the maintenance is troublesome, the influence of various impurities in flue gas is caused, the service life of the catalyst is short, and the catalyst needs to be replaced periodically. If the method of using copper molecular sieve as complexing adsorbent to obtain pressure swing adsorption mode to concentrate CO in waste gas and recover it, it also has the defects of high investment cost, large occupied area, easy blockage, troublesome maintenance and short service life of molecular sieve.
In summary, the following problems exist in the prior art: CO in sintering (pelletizing) waste gas is toxic gas, emission seriously poisons human bodies, and CO recycling in a pressure swing adsorption mode by using a catalytic combustion method and a copper molecular sieve as a complexing adsorbent has the defects of easy blockage, troublesome maintenance, high investment cost and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defects of the prior art that the CO treatment in the sintering (pelletizing) waste gas is easy to block, the maintenance is troublesome, the investment cost is high and the like.
The technical scheme of the utility model is that: a device for recycling CO in sintered pellet waste gas is characterized in that: the device includes the SCR reactor, the SCR reactor includes GGH and combustor, the combustor sets up in the perpendicular flue of the former flue gas side export of GGH, the combustor includes the combustion head, the combustion head includes the horn mouth, the horn mouth orientation is unanimous with the interior airflow direction of flue.
Specifically, an orifice is arranged on the flue wall of the vertical section of the original flue gas side outlet flue of the SCR reactor GGH, and the orifice is positioned at the middle-lower section between the outlet of the original flue gas heat exchanger of the GGH and the flue of the ammonia distributor.
Specifically, a combustion gas mixed gas inlet pipeline extends into the middle position of the cross section of a flue, a combustion head is arranged on the burner, the combustion head is uniformly distributed at the middle section of the vertical section of the original flue gas side outlet flue of the SCR reactor GGH, the combustion head is uniformly distributed at the middle line position of the cross section, the number of the combustion heads is more than or equal to 3, the combustion heads are uniformly distributed, and the combustion heads are arranged in a single row, a double row or staggered double row mode, so that the minimum distance between the top of the maximum flame and an ammonia gas distributor during the working of the burner is greater than 1 m.
Specifically, the distance between the combustion head and the flue wall is equal, the flame of the combustion head cannot contact the flue wall, and the distance from the flame of the combustion head to the peripheral flue wall is more than 0.5 m.
Specifically, the burner head of the burner is arranged at the middle-lower section of the vertical section of the flue at the GGH raw flue gas side of the SCR reactor, and is positioned at 1/3-1/2 of the length of the flue between the GGH raw flue gas side outlet and the ammonia distributor.
Specifically, the orifice is a flame observation hole, is arranged opposite to the flue with the same height of the burner head, the flame observation hole is opened and closed by a ball valve, and high-temperature-resistant glass is arranged behind the ball valve to isolate the inside and the outside of the flue.
Compared with the prior art, the utility model, following beneficial effect has:
because the combustion in the flue is adopted to reuse the CO combustion heat energy, the device is only arranged on the side of the flue of the original flue gas outlet of the GGH of the SCR reactor, the device has little change to the original SCR reactor, the occupied area is little, and the SCR reactor can be continuously and stably operated.
The chemical energy of high-concentration CO in the original sintering (pelletizing) waste gas is fully utilized, and a large amount of heat energy is generated by burning CO again, so that the heating temperature of the sintering (pelletizing) waste gas is reduced, a large amount of coal gas is saved, and the flue gas treatment cost is saved.
The method of combustion in the flue is adopted, so that the basic investment is low, additional equipment and facilities are not needed, the use and the maintenance are convenient, and the occupied area is saved.
The size of the combustion flame is automatically adjusted, the denitration efficiency is effectively improved, and the coal gas consumption is reduced.
The design of the fire observation hole is convenient, safe and efficient, and the daily point inspection and maintenance of the combustion quality of the combustion head are facilitated.
Drawings
FIG. 1 is a schematic view of the operation principle of an apparatus for recycling CO in sintering (pelletizing) waste gas provided by the present invention;
FIG. 2 is a schematic view of the installation of the flue section burner head of the present invention;
reference numerals:
1. a main exhaust fan; 2. an inlet flue of the SCR reactor; 3. GGH raw flue gas side; 4. GGH raw flue gas side outlet flue; 401. a flue wall; 402. a flame viewing aperture; 5. an ambient air inlet duct; 6. an induced draft fan; 7. a gas valve; 701. a gas pipeline; 8. a burner head; 9. an ammonia gas distributor; 10. a flue gas spoiler; 12. an observation window; 1201. a ball valve; 1202. high temperature resistant glass; 13. GGH clean flue gas side; 14. an SCR reactor outlet flue; 15. a booster fan; 16. a chimney; 18. and (4) gas is input into a pipeline.
Detailed Description
The utility model discloses it is right to combine the attached drawing below to describe specifically the utility model discloses, as shown in fig. 1, fig. 2, a device of CO in the sintering (pelletizing) waste gas of recycling, the device is implemented through the SCR denitration reactor, the SCR reactor includes GGH, the combustor, and the combustor sets up in the former flue gas side export perpendicular flue of GGH, the combustor includes combustion head 8, combustion head 8 includes the horn mouth, the horn mouth orientation is unanimous with the interior airflow direction of flue, and both are all upwards perpendicularly, can avoid flame to receive the air current undulant, influence the stability of flame burning.
More specifically, the burner head 8 of the burner is preferably located at a position in the lower middle section of the vertical section of the flue 4 on the GGH raw gas side of the SCR reactor, and at a position 1/3 to 1/2 of the length of the flue from the outlet on the GGH raw gas side to the ammonia distributor 9. The combustion heads 8 are uniformly arranged and can be arranged in a single row, double rows or staggered double rows, the minimum distance between the top of the maximum flame and the ammonia distributor 9 is more than 1m when the burner works, the number of the combustion heads is more than or equal to 3, equal distances are kept between the combustion heads 8 and the flue wall, the flame of the combustion head 8 cannot contact the flue wall, and the distance from the flame of the combustion head 8 to the peripheral flue wall is more than 0.5 m. The burner head is completely arranged in the flue, the whole flue is sealed, the negative pressure in the flue is ensured to be-100 pa to-2000 pa, and the burnt waste gas and CO are prevented from overflowing from the flue wall, otherwise, the harm of CO poisoning to workers is caused.
The combustor adopts an induced draft fan to mix air and coal gas and then enters a combustion head 8 in a flue for combustion, the combustor can adjust the using amount of the coal gas by adjusting a coal gas adjusting valve, the air quantity of the air is adjusted through an air door of the induced draft fan, the air and the coal gas are mixed and then are ignited at the combustion head in the flue, the flame size and the flame color are adjusted by adjusting the coal gas and the air quantity, and the condition that the combustion flame is light blue is ensured. The flame generated during the combustion of the mixed gas generates a high temperature of 800-1400 ℃, and CO in the waste gas of the sintering (pelletizing) machine passing through the flame will neutralize O in the waste gas2Oxidation reaction occurs and reburning (afterburning) occurs. The reaction time is 0.01 s-1 s, the conversion rate of CO is determined by the length of the reaction time, and the concentration of CO in the waste gas of the sintering (pelletizing) machine is reduced by 10-60% according to the uniformity of flame distribution and the gas residence time. Meanwhile, CO in the waste gas is oxidized to release a large amount of heat, so that the integral temperature of the flue gas in the SCR reactor is favorably improved, 10-60% of the gas consumption of the combustor can be saved when the temperature required by the SCR reactor is reached, and the gas is saved. The oxygen and the CO in the exhaust gas undergo an oxidation reaction, so that the oxygen content in the exhaust gas is further reduced.
The proportion of air and coal gas of the burner is adjusted according to the temperature required by the SCR reactor, the size of flame is controlled, and the capability of manually or automatically controlling the temperature of the flue gas after combustion is realized, so that the function of adjusting the reutilization rate of CO is realized.
The hole is punched (flame observation hole) on the vertical section flue wall of the original flue gas side outlet flue 4 of the reactor GGH, the orifice position is at the middle-lower section position between the outlet of the original flue gas heat exchanger of the GGH and the flue of the ammonia distributor 9, the flame color is used for observing the combustion of the combustion head, the combustion efficiency is judged, the flame observation hole is opened and closed by adopting a ball valve 1201, high-temperature-resistant glass is arranged behind the ball valve 1201 to isolate the inside and the outside of the flue, the ball valve 1201 can be closed to completely isolate when the flue is not observed, and the phenomenon that the smoke dust blocks the sight line due.
The specific implementation process comprises the following steps:
sintering (pelletizing) waste gas enters an inlet flue 2 of an SCR reactor through a main exhaust fan 1, then enters a GGH raw flue gas side 3, is heated through GGH heat exchange and then reaches an outlet flue 4 of the GGH raw flue gas side, an ambient air inlet pipeline 5 sucks air and gas of a gas pipeline 701 through an induced draft fan 6 and is completely mixed in a gas input pipeline 18 of a burner, then the mixture is burnt at a burner 8 of the burner, the size of flame of the burner 8 can be controlled by adjusting the gas amount of the ambient air inlet pipeline 5 and the gas pipeline 701, the sintering (pelletizing) waste gas is heated to 160-290 ℃ at the GGH raw flue gas side 3, CO in the sintering (pelletizing) waste gas is combusted after being afterburned by the burner 8 at the outlet flue 4 of the GGH raw flue gas side, the burnt CO reaction space is in the outlet flue 4 of the GGH raw flue gas side between the burner 8 and an ammonia distributor 9, the sintering (pelletizing) waste gas is heated to 190-330 ℃ in the space, at the moment, CO in the sintering (pelletizing) waste gas is gradually converted into CO after being combusted2The reaction does not produce impurities, the equipment is not easy to be blocked, CO in the combustion also emits a large amount of heat, the integral temperature of the flue gas in the SCR reactor is favorably improved, when the temperature required by the SCR reactor is reached, 10% -60% of the gas consumption of the burner can be saved, all the gas is uniformly mixed in the flue gas spoiler 10, and the uniformly mixed gas enters the SCR reactor. When controlling the combustion flame of the combustion head 8, a flame observation hole 402 is arranged at the position opposite to the flue wall 401 above the same height position of the head of the combustion head 8, a flame observation window 12 is arranged in the flame observation hole 402, and a ball valve 1201 of the observation window 12 can be openedAnd observing the flame color of the combustion head 8 through the high-temperature resistant glass 1202 to confirm whether the combustion head is normally combusted, adjusting the air door of the ambient air inlet extension and the combustion gas mixture flow of the gas pipeline 701 to adjust the flame combustion state, and ensuring the optimal combustion state through fine adjustment of the gas valve 7. The sintering (pelletizing) waste gas after temperature rise is cooled through a GGH clean flue gas side 13, the sintering (pelletizing) waste gas after temperature reduction and purification enters an outlet flue 14 of the SCR reactor, and then is pumped out by a booster fan 15 and sent to an external discharge chimney 16 for external discharge, and CO is discharged2Has little pollution to the environment, is harmless and nontoxic, and can be naturally purified.
110m in willow steel sintering plant2Sintering machine SCR denitration reactor has adopted the device to carry out the recycle of CO in the sintering waste gas, uses the utility model discloses before, contain 2000 ~ 30000mg/Nm in the outer row of waste gas of willow steel sintering plant sintering (pelletizing) machine3CO, adopt the utility model discloses afterwards, through on-the-spot preliminary measurement, CO reuse rate reaches 29.8% the most in the sintering waste gas, saves the required coke oven gas volume of SCR denitration reactor and reaches 29.9% the most.
The utility model discloses a recycle device of CO in sintering pelletizing waste gas, can recycle 10 ~ 60% CO in sintering (pelletizing) waste gas, convert CO into harmless nontoxic carbon dioxide, the reaction does not produce impurity, be difficult for causing the jam to equipment, utilize a large amount of heats of CO reburning release simultaneously, can practice thrift sintering (pelletizing) flue gas treatment in the required gas consumption of SCR denitration reactor 10 ~ 50%, meanwhile, reduce the oxygen content in the waste gas, help reducing the pollutant calculation concentration of outer row's waste gas, accomplish environmental protection and energy-conserving dual optimization.
The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. A device for recycling CO in sintered pellet waste gas is characterized in that: the device includes the SCR reactor, the SCR reactor includes GGH and combustor, the combustor sets up in the perpendicular flue of the former flue gas side export of GGH, the combustor includes the combustion head, the combustion head includes the horn mouth, the horn mouth orientation is unanimous with the interior airflow direction of flue.
2. The apparatus for recycling CO in the waste gas of sintered pellets as claimed in claim 1, wherein: and orifices are arranged on the vertical section flue wall of the original GGH flue gas side outlet flue of the SCR reactor, and are positioned at the middle-lower section between the outlet of the original GGH flue gas heat exchanger and the flue of the ammonia distributor.
3. The apparatus for recycling CO in the waste gas of sintered pellets as claimed in claim 1, wherein: the combustion gas and mixed gas inlet pipeline extends into the middle position of the cross section of a flue, the burner is provided with combustion heads, the combustion heads are uniformly distributed at the middle position of the vertical section of the original flue gas side outlet flue of the SCR reactor GGH, the combustion heads are equally distributed at the central line position of the cross section, the number of the combustion heads is more than or equal to 3, the combustion heads are uniformly distributed and are arranged in a single row, a double row or staggered double row mode, and the minimum distance between the top of the maximum flame and an ammonia distributor is ensured to be more than 1m when the burner works.
4. The apparatus for recycling CO in the waste gas of sintered pellets as claimed in claim 1, wherein: the burner head and the flue wall are kept at equal distances, the flame of the burner head cannot contact the flue wall, and the distance from the burner head to the peripheral flue wall is more than 0.5 m.
5. The apparatus for recycling CO in the waste gas of sintered pellets as claimed in claim 1, wherein: the burner head is arranged at the middle-lower section of the vertical section of the flue at the GGH raw gas side outlet of the SCR reactor, and is positioned at 1/3-1/2 of the length of the flue between the GGH raw gas side outlet and the ammonia distributor.
6. The apparatus for recycling CO in the waste gas of sintered pellets as claimed in claim 2, wherein: the port is a flame observation hole which is arranged opposite to the flue at the same height of the burner head, the flame observation hole is opened and closed by a ball valve, and high-temperature-resistant glass is arranged behind the ball valve to isolate the inside and the outside of the flue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021933631.6U CN213492933U (en) | 2020-09-07 | 2020-09-07 | Device for recycling CO in sintered pellet waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021933631.6U CN213492933U (en) | 2020-09-07 | 2020-09-07 | Device for recycling CO in sintered pellet waste gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213492933U true CN213492933U (en) | 2021-06-22 |
Family
ID=76445154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021933631.6U Active CN213492933U (en) | 2020-09-07 | 2020-09-07 | Device for recycling CO in sintered pellet waste gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213492933U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112304102A (en) * | 2020-09-07 | 2021-02-02 | 柳州钢铁股份有限公司 | Method and device for recycling CO in sintering pellet waste gas |
-
2020
- 2020-09-07 CN CN202021933631.6U patent/CN213492933U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112304102A (en) * | 2020-09-07 | 2021-02-02 | 柳州钢铁股份有限公司 | Method and device for recycling CO in sintering pellet waste gas |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109381990A (en) | A kind of steel sintering flue gas denitrification system and the method for denitration using system progress | |
| CN108916894A (en) | A kind for the treatment of process and device of the organic exhaust gas containing VOCs | |
| CN101063525A (en) | Oxygen-enriched combustion radiant tube heaters | |
| CN213492933U (en) | Device for recycling CO in sintered pellet waste gas | |
| CN211119357U (en) | Household garbage incineration equipment | |
| CN213132656U (en) | SCR denitration coal-fired power plant slag tap boiler waste gas processing system | |
| CN205909311U (en) | Heat accumulating type oxidation furnace | |
| CN102519049A (en) | Low energy consumption system for purifying and incinerating harmful gases | |
| CN215259855U (en) | Low-nitrogen combustion waste incinerator grate | |
| CN112304102A (en) | Method and device for recycling CO in sintering pellet waste gas | |
| CN110793044A (en) | Incineration device and method for treating sulfur recovery tail gas | |
| CN212594914U (en) | Waste liquid incinerator tail gas CO, NOx integration desorption device | |
| CN109268843A (en) | The device and method of dioxin, CO and nitrogen oxides in integration removing flue gas | |
| CN209926893U (en) | Car bottom type roasting furnace energy-saving and emission-reducing system | |
| CN111396902A (en) | Process for treating wet desulphurization regeneration tail gas by using tube furnace | |
| CN109974463A (en) | Vehicle bottom formula roaster energy-saving and emission-reduction system | |
| CN1962518A (en) | Calcium carbide furnace gas direct combustion method for producing calcium oxide | |
| CN113154382B (en) | Low-NOx combustor and using method | |
| CN205535848U (en) | Novel secondary oxidation formula waste incinerator device | |
| CN219713358U (en) | Flue gas external circulation nitrogen reduction system | |
| CN217636829U (en) | Reduce environmental protection processing system that industrial furnace flue gas CO discharged | |
| CN217274133U (en) | Garbage grate furnace with smoke recirculation | |
| CN214370242U (en) | Sulfur-containing and salt-containing waste gas and liquid clean treatment system | |
| CN219368436U (en) | High-efficient purification of sintering flue gas and chemical heat recycle system | |
| CN219222397U (en) | Ultralow nitrogen combustion system for low-heating-value fuel gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |