CN209828672U - Grate-rotary kiln SNCR/SCR denitration and active coke desulfurization combined system - Google Patents
Grate-rotary kiln SNCR/SCR denitration and active coke desulfurization combined system Download PDFInfo
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- CN209828672U CN209828672U CN201920408610.3U CN201920408610U CN209828672U CN 209828672 U CN209828672 U CN 209828672U CN 201920408610 U CN201920408610 U CN 201920408610U CN 209828672 U CN209828672 U CN 209828672U
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Abstract
The utility model belongs to the field of industrial waste gas treatment, and relates to a grate-rotary kiln SNCR/SCR denitration and active coke desulfurization combined system, wherein a denitration reducing agent injector of the SNCR system is communicated with one side of a preheating section II close to a rotary kiln; the preheating section II is communicated with the SCR system; the SCR system is communicated with the drying section II; the drying section II and the preheating section I are both communicated with an active coke desulfurization adsorption tower. The utility model also provides a combined process of grate-rotary kiln SNCR/SCR denitration and active coke desulfurization, wherein the flue gas of the rotary kiln enters a preheating II section, and ammonia water is sprayed into the flue gas inlet side of the preheating II section by adopting an SNCR system for denitration; and then, the flue gas enters an SCR system for denitration, and then enters a drying section II and a drying section I to be mixed, and then enters an active coke desulfurization adsorption tower for desulfurization after being dedusted by an electric precipitator, a main exhaust fan and a flue gas heat exchanger. The utility model discloses a combined system can improve denitration efficiency, reduce cost, and desulfurization, dust collection efficiency are high, and can realize the ultra-clean requirement.
Description
Technical Field
The utility model belongs to the technical field of industrial waste gas treatment, concretely relates to grate-rotary kiln pelletizing flue gas SNCR/SCR denitration and active coke desulfurization combined system.
Background
The pellets in the iron and steel plant have large smoke discharge amount, and the main pollutant of the smoke is NOX、SO2Dust and high concentration of discharged pollutants, and the limit value of the particles of the sintering machine and the pellet roasting equipment is adjusted to be 10mg/Nm3The limit of sulfur dioxide is adjusted to 35mg/Nm3The nitrogen oxide limit is adjusted to 50mg/Nm3(ii) a Therefore, the flue gas of the pelletizing plant must be subjected to flue gas desulfurization, denitrification and dedusting by selecting a process technology with high denitration, desulfurization and dedusting efficiency and mature technology.
The domestic pellet flue gas denitration technology is divided into three types: SNCR, SCR denitration, and ozonation denitration. Ozone oxidation denitration technology suitable for NOXLow concentration of flue gas, high concentration of NOXFlue gas extractionThe operation cost of the oxidation and denitration by ozone is too high, and nitrogen-containing sewage can be generated; the SNCR method has low denitration efficiency and is suitable for areas with low environmental protection requirements; SCR denitration is currently applied rarely. The pellet flue gas desulfurization technology is divided into three types: limestone-gypsum process, ammonia process, and activated coke process. The limestone-gypsum method and the ammonia method are applied more, but the temperature of the discharged flue gas is lower, the moisture content is higher, the phenomenon of 'white smoke' can be generated, the white smoke elimination treatment needs to be carried out on the discharged flue gas, the energy consumption is increased, and the investment and the operation cost are also increased; the active coke desulfurization is dry desulfurization, and compared with the original flue gas, the flue gas after desulfurization has no temperature reduction, no moisture content increase and no white smoke generation.
The existing pellet flue gas denitration and desulfurization process has high cost and low efficiency, so that a high-efficiency and low-cost combined system for SNCR/SCR denitration and active coke desulfurization of pellet flue gas needs to be designed.
Disclosure of Invention
In order to overcome the not enough of above-mentioned prior art existence, the utility model aims at providing a grate-rotary kiln pelletizing flue gas SNCR SCR denitration and active coke desulfurization combined system not only can improve denitration efficiency, reduces the denitration cost, and desulfurization efficiency and dust collection efficiency are high, and the pollutant discharges moreover and can realize the ultra-clean requirement.
In order to achieve the purpose, the technical scheme of the utility model is that the combined system of chain grate-rotary kiln SNCR/SCR denitration and active coke desulfurization comprises a chain grate and a rotary kiln, wherein the chain grate comprises a drying section I, a drying section II, a preheating section I and a preheating section II which are connected in sequence, the preheating section II is connected with the rotary kiln, the combined system further comprises an SNCR system, an SCR system and an active coke desulfurization adsorption tower, and a denitration reducing agent injector of the SNCR system is communicated with one side of the preheating section II, which is close to the rotary kiln; the flue gas outlet of the preheating section II is communicated with the flue gas inlet of the SCR system; the flue gas outlet of the SCR system is communicated with the flue gas inlet of the drying section II; and the flue gas outlet of the drying section II and the flue gas outlet of the preheating section I are communicated with the flue gas inlet of the active coke desulfurization adsorption tower, and the purified flue gas outlet of the active coke desulfurization adsorption tower is communicated with a chimney.
Further, the preheating section II is connected with the rotary kiln through an inclined pipeline, the inclined pipeline inclines downwards along the preheating section II, and one side of the preheating section II, which is close to the inclined pipeline, and the inclined pipeline are communicated with a denitration reducing agent injector of the SNCR system.
Further, the preheating section II is connected with the rotary kiln through a chute, high-temperature flue gas enters the preheating section II smoke hood from the rotary kiln through the chute, and the preheating section II smoke hood and the chute are both communicated with a denitration reducing agent injector of the SNCR system.
Further, the drying grate with be equipped with electrostatic precipitator, main air exhauster and gas heater between the flue gas inlet of active burnt desulfurization adsorption tower in proper order, the exhanst gas outlet of dry II sections with preheat I section the exhanst gas outlet all with the electrostatic precipitator intercommunication, the electrostatic precipitator passes through main air exhauster with gas heater's gas inlet intercommunication, gas heater's exhanst gas outlet with the gas inlet intercommunication of active burnt desulfurization adsorption tower.
Further, a smoke outlet of the SCR system is communicated with a smoke inlet of the second drying section through a heat-resistant fan.
Furthermore, the combined system also comprises a regeneration tower, wherein a discharge hole of the regeneration tower is connected with an active coke feed inlet of the active coke desulfurization adsorption tower through a first chain bucket machine, and the feed inlet of the regeneration tower is connected with an active coke discharge hole of the active coke desulfurization adsorption tower through a second chain bucket machine.
Furthermore, a screening device is further arranged between the discharge hole of the regeneration tower and the first chain bucket machine, the discharge hole of the regeneration tower is communicated with the feed inlet of the screening device, and a qualified material outlet of the screening device is connected with the feed inlet of the first chain bucket machine.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the combined SNCR/SCR denitration and active coke desulfurization system for the grate-rotary kiln pellet flue gas provided by the utility model fully utilizes the high-temperature flue gas in the preheating section II and sprays a denitration reducing agent to carry out SNCR denitration reaction; the flue gas after SNCR denitration reaction enters an SCR system for denitration, and the SCR denitration reaction can fully utilize the unreacted reducing agent of SNCR denitration, reduce ammonia escape and improve the denitration efficiency;
(2) the SNCR system in the combined system of grate-rotary kiln pellet flue gas SNCR/SCR denitration and active coke desulfurization provided by the utility model extends the denitration reducing agent injector into the preheating II-section smoke hood and chute and injects the reducing agent for denitration, has simple structure and low cost, is combined with the SCR system for use, can meet the requirement of ultra-clean emission, and can obviously reduce the investment cost and the operation cost of the denitration system;
(3) the utility model provides a grate-rotary kiln pelletizing flue gas SNCR/SCR denitration and active coke desulfurization combined system selects the flue gas that contains NOx to carry out centralized denitration treatment, has obviously reduced the flue gas handling capacity, has reduced the denitration system investment, and need not heat up the flue gas, has reduced process equipment, has simplified process flow, has reduced the anticorrosive requirement of equipment and pipeline to investment has been greatly saved;
(4) the utility model provides a grate-rotary kiln pelletizing flue gas SNCR SCR denitration and active coke desulfurization combined system adopts the active coke desulfurization, can be with the SO in the flue gas2The dust in the flue gas can be removed by adsorption, the temperature of the flue gas is not reduced, the humidity of the flue gas is not increased, and the phenomenon of 'white smoke' does not occur in the discharged flue gas.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of a combined SNCR/SCR denitration and activated coke desulfurization system for pellet flue gas of a grate-rotary kiln provided by an embodiment of the present invention;
in the figure: 1. the system comprises a first drying section I, a second drying section II, a first preheating section I, a second preheating section II, a rotary kiln, a first SNCR system, a second SNCR system 7, a multi-pipe dust remover, a third SCR system 8, a third SCR system 9, a heat-resisting fan 10, an electric dust remover 11, a main exhaust fan 12, a flue gas heat exchanger 13, an active coke desulfurization adsorption tower 14, a regeneration tower 15, a screening device 16, a heating furnace 17, a cooling air system 18, an acid making system 19, a chimney 20, a storage bin 21, a first chain bucket machine 22, a second chain bucket machine 23, a catalyst layer 24 and an ammonia spraying grid.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in figure 1, the embodiment of the utility model provides a grate-rotary kiln SNCR/SCR denitration and active coke desulfurization combined system, including grate, rotary kiln 5, the grate includes dry I section 1, dry II section 2, preheat I section 3, preheat II section 4 that connect gradually, preheat II section 4 and be connected with rotary kiln 5, still include SNCR system 6, SCR system 8 and active coke desulfurization adsorption tower 13, the denitration reductant sprayer of SNCR system 6 with preheat II section 4 and be close to one side of rotary kiln 5 intercommunication, the flue gas outlet of preheating II section 4 and the flue gas inlet of SCR system 8 communicate, the flue gas outlet of SCR system 8 and the flue gas inlet of dry II section 2 communicate, the flue gas outlet of dry II section 2 and the flue gas outlet of preheating I section 3 all communicate with the flue gas inlet of active coke desulfurization adsorption tower 13, the purification flue gas outlet of active coke desulfurization adsorption tower 13 communicates with chimney 19, the utility model provides a SNCR/SCR and active coke desulfurization combined denitration system can reach 35850% of denitration ammonia water when denitration reaction cost reduction denitration system and denitration reaction flue gas denitration pellet denitration reaction cost reach the SNCR system, the denitration system can reach the low cost of denitration reaction, and denitration reaction denitration catalyst system reach about 35850, and the denitration catalyst system can reach the clean denitration reaction cost of SNCR system after the SNCR system that the denitration reaction cost of denitration can reach the SNCR 19 and the denitration reaction, and the denitration reaction of the denitration catalyst system, and the denitration catalyst system can reach the denitration catalyst system, and reduce the cost of denitration.
Further, the preheating section II 4 is connected with the rotary kiln 5 through an inclined pipeline, high-temperature flue gas enters the preheating section II 4 smoke hood from the rotary kiln 5 through a chute, and the preheating section II 4 smoke hood and the chute are both communicated with a denitration reducer of the SNCR system 6.
Further, a multi-tube dust collector 7 is arranged between the preheating section II 4 and the SCR system 8, a flue gas outlet of the preheating section II 4 is communicated with a flue gas inlet of the multi-tube dust collector 7, and a flue gas outlet of the multi-tube dust collector 7 is communicated with a flue gas inlet of the SCR system 8.
Further, a smoke outlet of the SCR system 8 is communicated with a smoke inlet of the drying II section 2 through a heat-resistant fan 9. In the embodiment, the flue gas containing NOx is subjected to centralized treatment, namely the SCR system 8 is arranged between the multi-pipe dust remover 7 and the heat-resisting fan 9, so that the flue gas treatment capacity is obviously reduced, and compared with the rear denitration, the process technology does not need to heat the flue gas, so that the process equipment is reduced, the process flow is simplified, the corrosion prevention requirements of equipment and pipelines are lowered, and the investment of a denitration system is greatly saved.
Further, the drying grate with be equipped with electrostatic precipitator 10, main air exhauster 11 and gas heater 12 between the flue gas inlet of active burnt desulfurization adsorption tower 13 in proper order, dry II section 2's exhanst gas outlet with preheat I section 3's exhanst gas outlet all with electrostatic precipitator 10 intercommunication, electrostatic precipitator 10 passes through main air exhauster 11 with gas heater 12's gas inlet intercommunication, gas heater 12's exhanst gas outlet with active burnt desulfurization adsorption tower 13's gas inlet intercommunication. The active coke desulfurization is adopted in the embodiment, and is a dry desulfurization characteristic, the temperature of the flue gas is not reduced, the humidity of the flue gas is not increased, and the discharged flue gas cannot be dischargedThe phenomenon of 'white smoke' occurs; and can not only remove SO in the flue gas2The dust in the flue gas can be removed by adsorption, and the integrated treatment of multiple pollutants can be realized.
Further, the combined system further comprises a regeneration tower 14, a discharge hole of the regeneration tower 14 is connected with an active coke feed inlet of the active coke desulfurization adsorption tower 13 through a first chain bucket machine 21, and a feed inlet of the regeneration tower 14 is connected with an active coke discharge hole of the active coke desulfurization adsorption tower through a second chain bucket machine 22. In the embodiment, the regeneration heat of the regeneration tower 14 is provided by burning coal gas by a heating furnace 16, the high-temperature active coke is cooled to 120 ℃ by a cooling air system 17, and the regeneration tower 14 regenerates to generate enriched SO2Gas, acid making system 18 for SO2The gas is prepared into concentrated sulfuric acid, so that the resource utilization of waste can be realized.
Furthermore, a screening device 15 is further arranged between the discharge port of the regeneration tower 14 and the first chain bucket machine 21, the discharge port of the regeneration tower 14 is communicated with the feed port of the screening device 15, and a qualified material outlet of the screening device 15 is connected with the feed port of the first chain bucket machine 21.
As shown in fig. 1, the embodiment of the present invention further provides a combined process of chain grate-rotary kiln SNCR/SCR denitration and activated coke desulfurization, wherein the chain grate comprises a drying section i 1, a drying section ii 2, a preheating section i 3, and a preheating section ii 4, which are connected in sequence, and the process comprises the following steps:
1) flue gas generated by roasting the rotary kiln 5 enters a preheating II section 4 of the chain grate, and ammonia water is sprayed to the flue gas inlet side of the preheating II section 4 by adopting an SNCR system 6 for denitration;
2) the flue gas after SNCR denitration enters a multi-pipe dust remover 7 for dust removal, and then is uniformly mixed with a reducing agent sprayed by an ammonia spraying grid and enters an SCR system 8 for denitration;
3) the flue gas after SCR denitration enters a drying II section 2 of a chain grate machine for heat exchange and then is mixed with the flue gas at the outlet of a preheating I section 3 of the chain grate machine, and then the mixture enters an electric dust remover 10 for dust removal;
4) the flue gas after the electric dust removal enters a flue gas heat exchanger 12 through a main exhaust fan 11, the flue gas after the heat exchange enters an active coke desulfurization adsorption tower 13 for desulfurization, and the purified flue gas after the active coke desulfurization is discharged from a chimney 19.
Flue gas generated by the rotary kiln 5 enters a preheating II-section 4-smoke hood, wherein the temperature of the flue gas is high and is about 850-1100 ℃, and the temperature is suitable for SNCR denitration; the SNCR ammonia spraying point is generally arranged on the side wall and the front side of the preheating II-section 4 smoke hood, and the SNCR system 6 sprays diluted ammonia water into the preheating II-section 4 smoke hood to be mixed with high-temperature smoke gas, so that NOx is removed;
flue gas at the outlet of the air box of the pellet preheating section II 4 passes through a multi-tube dust remover 7, the temperature of the flue gas is about 320-400 ℃, the flue gas is very suitable for medium-temperature SCR denitration, an SCR system 8 is arranged between the multi-tube dust remover 7 and a heat-resistant fan 9, an SCR ammonia supply system is sprayed into a front flue of the SCR system through an ammonia spraying grid, a denitration reducing agent is fully mixed with the flue gas, and NOx is removed under the action of a catalyst; according to the SNCR/SCR denitration process, the SCR denitration can fully utilize the unreacted reducing agent of the SNCR denitration, the flue gas containing NOx is selected for centralized treatment, the flue gas treatment capacity is obviously reduced, compared with the rear-mounted denitration, the process technology does not need to heat the flue gas, the process equipment is reduced, the process flow is simplified, the corrosion prevention requirements of equipment and pipelines are reduced, and therefore the investment is greatly saved.
Further, the temperature of the flue gas after heat exchange in the flue gas heat exchanger 12 in the step 4) is lower than 135 ℃. Preheating I section 3 and dry II section 2 bellows export flue gas and converging and get into electrostatic precipitator 10, the pressure boost of main air exhauster 11, thereby it is less than 135 ℃ to guarantee to get into the 13 temperature of active burnt desulfurization adsorption tower, thereby set up gas heater 12 behind main air exhauster 11 and guarantee the safe operation of active burnt desulfurization adsorption tower 13. The flue gas enters an active coke desulfurization adsorption tower 13, the purified flue gas is discharged through a chimney after desulfurization and dust removal, and dust is removed through collision, shielding and diffusion capture mechanisms.
Further, the active coke saturated in the active coke desulfurization adsorption tower 13 in the step 4) is conveyed to the regeneration tower 14 through the second chain bucket machine 22 for regeneration, the regenerated active coke is screened through the screening equipment 15, the qualified active coke is conveyed to the active coke desulfurization adsorption tower 13 through the first chain bucket machine 21 for reuse, and a small amount of coke powder is recycled, so that the cyclic operation is realized. The regeneration heat of the regeneration tower 14 is provided by burning coal gas by a heating furnace 16, and the high-temperature active coke is provided byThe cooling air system 17 is cooled to 120 ℃, and the regeneration gas of the regeneration tower 14 is rich in SO2The gas is delivered to an acid making system 18 to provide SO2The gas is made into concentrated sulfuric acid for resource utilization. The active coke desulfurization system can realize integrated treatment of multiple pollutants, and has high byproduct recovery rate and low comprehensive operation cost.
According to the special condition of a pellet thermal regulation, the combined system and the combined process adopt combination of SNCR/SCR denitration and activated coke desulfurization, and SNCR fully utilizes high-temperature flue gas at about 850-1100 ℃ of a preheating II-section 4 smoke hood to carry out primary denitration; the SCR system 8 is arranged between the multi-pipe dust remover 7 and the heat-resisting fan 9, and the efficiency of more than 90 percent can be achieved by using the proper smoke temperature of 320-400 ℃ at the outlet of the multi-pipe dust remover 7 without reheating; preheating I section and dry II section bellows outlet flue gas and converging and then entering electric dust remover 10, the export flue gas is through main air exhauster 11 pressure boost, after 12 cooling of gas heat exchanger, gets into active coke desulfurization adsorption tower 13, SO in the flue gas2And dust are removed in the adsorption tower, so that high desulfurization efficiency and dust removal efficiency can be achieved, and the pollutant emission can meet the ultra-clean requirement, namely NOXLess than 50mg/Nm3， SO2Less than 35mg/Nm3Dust concentration is less than 10mg/Nm3。
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. A grate-rotary kiln SNCR/SCR denitration and active coke desulfurization combined system comprises a grate and a rotary kiln, wherein the grate comprises a drying section I, a drying section II, a preheating section I and a preheating section II which are sequentially connected, and the preheating section II is connected with the rotary kiln, and the combined system is characterized in that: the denitration reducing agent injector of the SNCR system is communicated with one side, close to the rotary kiln, of the preheating section II; the flue gas outlet of the preheating section II is communicated with the flue gas inlet of the SCR system; the flue gas outlet of the SCR system is communicated with the flue gas inlet of the drying section II; and the flue gas outlet of the drying section II and the flue gas outlet of the preheating section I are communicated with the flue gas inlet of the active coke desulfurization adsorption tower, and the purified flue gas outlet of the active coke desulfurization adsorption tower is communicated with a chimney.
2. The grate-rotary kiln SNCR/SCR denitration and activated coke desulfurization combined system of claim 1, wherein: the preheating second section is connected with the rotary kiln through a chute, high-temperature flue gas enters the preheating second section smoke hood from the rotary kiln through the chute, and the preheating second section smoke hood and the chute are both communicated with a denitration reducing agent injector of the SNCR system.
3. The grate-rotary kiln SNCR/SCR denitration and activated coke desulfurization combined system of claim 1, wherein: preheating II sections with be equipped with the multitube dust remover between the SCR system, preheat II exhanst gas outlet of section with the flue gas inlet intercommunication of multitube dust remover, the flue gas outlet of multitube dust remover with the flue gas inlet intercommunication of SCR system.
4. The grate-rotary kiln SNCR/SCR denitration and activated coke desulfurization combined system of claim 1, wherein: the drying device comprises a drying grate, a drying tower, an active coke desulfurization adsorption tower, a drying fan, a main exhaust fan, a flue gas heat exchanger, an electric dust collector, a main exhaust fan and a flue gas heat exchanger, wherein the electric dust collector is arranged between the drying grate and the flue gas inlet of the active coke desulfurization adsorption tower in sequence, the flue gas outlet of the drying section II and the flue gas outlet of the preheating section I are communicated with the electric dust collector, the electric dust collector passes through the main exhaust fan and the flue gas inlet of the flue gas heat exchanger, and the flue.
5. The grate-rotary kiln SNCR/SCR denitration and activated coke desulfurization combined system of claim 1, wherein: and a smoke outlet of the SCR system is communicated with a smoke inlet of the second drying section through a heat-resistant fan.
6. The grate-rotary kiln SNCR/SCR denitration and activated coke desulfurization combined system of claim 1, wherein: the device is characterized by further comprising a regeneration tower, wherein a discharge port of the regeneration tower is connected with an active coke feed inlet of the active coke desulfurization adsorption tower through a first chain bucket machine, and a feed inlet of the regeneration tower is connected with an active coke discharge port of the active coke desulfurization adsorption tower through a second chain bucket machine.
7. The grate-rotary kiln SNCR/SCR denitration and activated coke desulfurization combined system of claim 6, wherein: and a screening device is further arranged between the discharge port of the regeneration tower and the first chain bucket machine, the discharge port of the regeneration tower is communicated with the feed port of the screening device, and a qualified material outlet of the screening device is connected with the feed port of the first chain bucket machine.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109794146A (en) * | 2019-03-28 | 2019-05-24 | 中冶南方都市环保工程技术股份有限公司 | A kind of grate kiln SNCR/SCR denitration and active coke desulphurizing combined system and technique |
| CN113883897A (en) * | 2020-07-01 | 2022-01-04 | 中冶长天国际工程有限责任公司 | Air channeling prevention system for preheating section of chain grate machine and air flow control method thereof |
| WO2022007400A1 (en) * | 2020-07-10 | 2022-01-13 | 中冶长天国际工程有限责任公司 | Flue gas treatment process and treatment system |
| RU2793175C1 (en) * | 2020-07-10 | 2023-03-29 | Чжуне Чантянь Интернешнал Энджиниринг Ко., Лтд | Waste gas treatment method and treatment system |
-
2019
- 2019-03-28 CN CN201920408610.3U patent/CN209828672U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109794146A (en) * | 2019-03-28 | 2019-05-24 | 中冶南方都市环保工程技术股份有限公司 | A kind of grate kiln SNCR/SCR denitration and active coke desulphurizing combined system and technique |
| CN109794146B (en) * | 2019-03-28 | 2024-04-26 | 中冶南方都市环保工程技术股份有限公司 | Grate-rotary kiln SNCR/SCR denitration and active coke desulfurization combined system and process |
| CN113883897A (en) * | 2020-07-01 | 2022-01-04 | 中冶长天国际工程有限责任公司 | Air channeling prevention system for preheating section of chain grate machine and air flow control method thereof |
| WO2022007400A1 (en) * | 2020-07-10 | 2022-01-13 | 中冶长天国际工程有限责任公司 | Flue gas treatment process and treatment system |
| RU2793175C1 (en) * | 2020-07-10 | 2023-03-29 | Чжуне Чантянь Интернешнал Энджиниринг Ко., Лтд | Waste gas treatment method and treatment system |
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