WO2023050943A1 - 用于水泥厂烟气的低温脱硫脱硝系统 - Google Patents

用于水泥厂烟气的低温脱硫脱硝系统 Download PDF

Info

Publication number
WO2023050943A1
WO2023050943A1 PCT/CN2022/102473 CN2022102473W WO2023050943A1 WO 2023050943 A1 WO2023050943 A1 WO 2023050943A1 CN 2022102473 W CN2022102473 W CN 2022102473W WO 2023050943 A1 WO2023050943 A1 WO 2023050943A1
Authority
WO
WIPO (PCT)
Prior art keywords
flue gas
outlet
inlet
adsorbent
section
Prior art date
Application number
PCT/CN2022/102473
Other languages
English (en)
French (fr)
Inventor
牛红伟
郜时旺
李卫东
肖平
许世森
刘练波
汪世清
李海滨
张再明
Original Assignee
中国华能集团清洁能源技术研究院有限公司
华能湖南岳阳发电有限责任公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 中国华能集团清洁能源技术研究院有限公司, 华能湖南岳阳发电有限责任公司 filed Critical 中国华能集团清洁能源技术研究院有限公司
Publication of WO2023050943A1 publication Critical patent/WO2023050943A1/zh

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
    • B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
    • F27D15/02—Cooling
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases

Definitions

  • the present application relates to the technical field of flue gas treatment, in particular to a low-temperature desulfurization and denitrification system for flue gas from a cement plant.
  • the flue gas produced by the rotary kiln in the cement plant mainly includes dust and acid gaseous pollutants such as SOx and NOx .
  • the flue gas of the rotary kiln in the cement plant is denitrated by the SCR denitrification process.
  • the SCR denitrification process requires a corresponding catalyst.
  • the denitrification temperature of the SCR denitrification process is usually 160°C-170°C, or 280°C-350°C. The denitrification efficiency is low under high temperature conditions.
  • This application aims to solve one of the technical problems in the related art at least to a certain extent.
  • the embodiment of the present application proposes a low-temperature desulfurization and denitrification system for flue gas from a cement plant.
  • the system can reduce the temperature of the flue gas to below 20° C. before desulfurization and denitrification, and has high denitrification efficiency.
  • a rotary kiln comprising a flue gas discharge port
  • a cooling system the cooling system includes a first flue gas inlet and a first flue gas outlet, the flue gas discharge port communicates with the first flue gas inlet, so as to pass the flue gas into the cooling system, thereby The temperature of the flue gas drops below 20°C;
  • An adsorption tower the adsorption tower includes a first feed port, a first discharge port, a second flue gas inlet and a second flue gas outlet, and the first flue gas outlet communicates with the second flue gas inlet, so that Pass the flue gas into the adsorption tower to desulfurize and denitrify the flue gas, the first feed port is used to add adsorbent to the adsorption tower, and the first discharge port Used to discharge the adsorbent in the adsorption tower;
  • a regeneration tower the regeneration tower includes a second feed port, a preheating section, a regeneration section, a cooling section and a second discharge port, and the second feed port is used to add the first The adsorbent discharged from the discharge port, the second discharge port is used to discharge the adsorbent in the regeneration tower, the preheating section is used to preheat the adsorbent in the regeneration tower, and the regeneration section uses For producing acid gas, the cooling section is used to cool the adsorbent in the regeneration tower.
  • the flue gas discharged from the rotary kiln can be cooled through the cooling system to reduce the temperature of the flue gas to below 20°C, and then the flue gas can be passed into the
  • the adsorption tower performs desulfurization and denitrification, which can fully absorb the acid gas in the flue gas, thereby improving the efficiency of desulfurization and denitrification.
  • the low-temperature desulfurization and denitrification system for cement plant flue gas in the embodiment of the present application also uses the adsorbent in the adsorption tower to prepare acid gas through the regeneration tower, so that the acid gas adsorbed by the adsorbent is released, and the adsorbent can be regenerated. Used to adsorb acid gases in flue gas.
  • the inlet of the preheating section is connected to the second feed port, so that the adsorbent fed into the regeneration tower from the second discharge port enters the preheating section, and the The inlet of the regeneration section is connected with the outlet of the preheating section, so that the adsorbent in the preheating section enters the regeneration section, and the inlet of the cooling section is connected with the outlet of the regeneration section, so that the regeneration section
  • the adsorbent in the cooling section enters the cooling section, and the outlet of the cooling section is connected to the second outlet, so that the adsorbent in the cooling section is discharged through the second outlet.
  • the preheating section includes a preheating pipeline for heating the adsorbent in the preheating section
  • the regeneration section includes a heating pipeline and an acid gas outlet
  • the heating pipeline It is used to heat the adsorbent in the regeneration section, so that the adsorbent in the regeneration section releases acid gas
  • the acid gas outlet is used to discharge the acid gas
  • the cooling section includes a cooling pipeline
  • the cooling Pipes are used to cool the sorbent in the cooling section.
  • the low-temperature desulfurization and denitrification system for cement plant flue gas further includes a grate cooler
  • the rotary kiln also includes an air inlet
  • the grate cooler includes a first air outlet and a second air outlet
  • the first air outlet communicates with the air inlet of the rotary kiln, so as to introduce high-temperature air into the rotary kiln
  • the preheating pipeline includes a first pipeline inlet and a first pipeline outlet, and the first pipeline inlet communicates with the second air outlet so that air can be introduced into the preheating pipeline to preheat the preheating pipeline.
  • Adsorbent in the hot section Adsorbent in the hot section.
  • the low-temperature desulfurization and denitrification system for cement plant flue gas further includes a preheater and a waste heat boiler, the preheater includes a third flue gas inlet and a third flue gas outlet, and the third The flue gas inlet communicates with the flue gas discharge port, so that the flue gas passes into the preheater, thereby reducing the temperature of the flue gas to 300°C-330°C,
  • the waste heat boiler includes a fourth flue gas inlet and a fourth flue gas outlet, and the fourth flue gas inlet communicates with the third flue gas outlet so that the flue gas passes into the waste heat boiler, so that the The temperature of the flue gas is lowered to 180°C-230°C, the fourth flue gas outlet communicates with the first flue gas inlet, so that the flue gas discharge port communicates with the first flue gas inlet,
  • the heating pipeline includes a second pipeline inlet and a second pipeline outlet, and the second pipeline inlet communicates with the fourth flue gas outlet so that the flue gas can be passed into the heating pipeline to heat the regenerative
  • the adsorbent in the section, the outlet of the second pipeline communicates with the first flue gas inlet, so that the flue gas passes into the cooling system.
  • the cooling pipe includes a third pipe inlet and a third pipe outlet, and the third pipe inlet communicates with the second flue gas outlet so that the flue gas enters the cooling pipe, thereby cooling Adsorbent in the cooling section.
  • the low-temperature desulfurization and denitrification system for cement plant flue gas further includes a first conveying device and a second conveying device, and the first conveying device is used to discharge the adsorbent from the first outlet.
  • the agent is transported to the second feed port of the regeneration tower, so as to add the adsorbent discharged from the first discharge port into the regeneration tower,
  • the second conveying device is used to transport the adsorbent discharged from the second discharge port to the first feed port of the adsorption tower, so as to add the second discharge port to the adsorption tower discharged adsorbent.
  • the low-temperature desulfurization and denitrification system for cement plant flue gas further includes a raw material grinding system and a dust collector, the raw material grinding system includes a fifth flue gas inlet and a fifth flue gas outlet, the The fifth flue gas inlet communicates with the fourth flue gas outlet so that the flue gas enters the raw material grinding system to dry raw materials,
  • the dust collector includes an air inlet and an air outlet, and the air inlet of the dust collector communicates with each of the fourth flue gas outlet and the fifth flue gas outlet so as to pass the flue gas through into the dust collector,
  • the gas outlet of the dust collector communicates with the first flue gas inlet, so that the flue gas discharge port communicates with the first flue gas inlet.
  • the low-temperature desulfurization and denitrification system for cement plant flue gas further includes a first induced draft fan and a second induced draft fan, and the first induced draft fan is installed between the waste heat boiler and the raw material grinding system Between, the air inlet of the first induced draft fan communicates with the fourth flue gas outlet, and the air outlet of the first induced draft fan communicates with each of the fifth flue gas inlet and the air inlet of the dust collector.
  • the low-temperature desulfurization and denitrification system for cement plant flue gas further includes a chimney, the inlet of the chimney communicates with the outlet of the third pipe of the cooling pipe, so as to discharge the flue gas.
  • Fig. 1 is a schematic diagram of a low-temperature desulfurization and denitrification system for cement plant flue gas according to an embodiment of the present application.
  • Fig. 2 is a partial structural schematic diagram of a low-temperature desulfurization and denitrification system for cement plant flue gas according to an embodiment of the present application.
  • Grate cooler 1 first air outlet 101; second air outlet 102;
  • Rotary kiln 2 air inlet 201; flue gas discharge port 202;
  • waste heat boiler 4 fourth flue gas inlet 401; fourth flue gas outlet 402;
  • Raw material grinding system 5 fifth flue gas inlet 501; fifth flue gas outlet 502;
  • Dust collector 6 air inlet 601; air outlet 602;
  • Cooling system 7 first flue gas inlet 701; first flue gas outlet 702;
  • Adsorption tower 8 first feed port 801, first discharge port 802; second flue gas inlet 803; second flue gas outlet 804;
  • Regeneration tower 9 second feed port 901; second feed port 902;
  • Preheating section 910 first pipeline inlet 911; first pipeline outlet 912;
  • regeneration section 920 acid gas outlet 923; second pipeline inlet 921; second pipeline outlet 922;
  • the first induced draft fan 12 The first induced draft fan 12;
  • the second induced draft fan 13 The second induced draft fan 13;
  • the low-temperature desulfurization and denitrification system for cement plant flue gas includes a rotary kiln 2 , a cooling system 7 , an adsorption tower 8 and a regeneration tower 9 .
  • the rotary kiln 2 includes a flue gas discharge port 202, and the cooling system 7 includes a first flue gas inlet 701 and a first flue gas outlet 702.
  • the flue gas discharge port 202 communicates with the first flue gas inlet 701, so the flue gas discharged from the rotary kiln 2 can Pass into the cooling system 7, after the flue gas is cooled by the cooling system 7, the temperature drops below 20°C.
  • the adsorption tower 8 includes a first feed port 801, a first discharge port 802, a second flue gas inlet 803 and a second flue gas outlet 804, and the first flue gas outlet 702 communicates with the second flue gas inlet 803, so after cooling
  • the flue gas can pass into the adsorption tower 8, and the adsorption tower 8 performs low-temperature desulfurization and denitrification on the flue gas, which can improve the desulfurization rate and denitrification rate of the flue gas.
  • the regeneration tower 9 comprises a second feed inlet 901, a preheating section 910, a regeneration section 920, a cooling section 930 and a second discharge outlet 902, the second feed inlet 901, a preheating section 910, a regeneration section 920, and a cooling section 930 and the second outlet 902 are arranged in sequence from top to bottom.
  • the first feed port 801 is used to add adsorbent into the adsorption tower 8
  • the first discharge port 802 is used to discharge the adsorbent in the adsorption tower 8 .
  • the second feed port 901 is used to add the adsorbent discharged from the first discharge port 802 into the regeneration tower 9, the second feed port 902 is used to discharge the adsorbent in the regeneration tower 9, and the preheating section 910 is used for preheating The adsorbent in the regeneration tower 9, the regeneration section 920 is used to prepare acid gas, and the cooling section 930 is used to cool the adsorbent in the regeneration tower 9.
  • the adsorbent in the adsorption tower 8 is discharged from the first outlet 802, it is delivered to the second feed port 901 of the regeneration tower 9, and the adsorbent can absorb the acid gas (acid gas state) in the regeneration tower 9 Pollutants) are released for the production of acid gas.
  • the adsorbent entering the regeneration tower 9 is preheated in the preheating section 910, then enters the regeneration section 920 to release the adsorbed acid gas, and then enters the cooling section 930 for cooling.
  • the acid gas in the flue gas is adsorbed again in the tower 8 .
  • the flue gas discharged from the rotary kiln 2 can be cooled through the cooling system 7 to reduce the temperature of the flue gas to below 20°C, and then the flue gas can be passed into the
  • the adsorption tower 8 performs desulfurization and denitrification, and can fully absorb the acidic gas in the flue gas, thereby improving the efficiency of desulfurization and denitrification.
  • the low-temperature desulfurization and denitrification system for cement plant flue gas in the embodiment of the present application also uses the adsorbent in the adsorption tower 8 to prepare acid gas through the regeneration tower 9, so that the acid gas adsorbed by the adsorbent is released, and the adsorbed The agent is then used to adsorb the acid gas in the flue gas.
  • the low-temperature desulfurization and denitrification system for cement plant flue gas in the embodiment of the present application further includes a first conveying device 111 and a second conveying device 112 .
  • the first conveying device 111 can transport the adsorbent discharged from the first discharge port 802 to the second feed port 901 of the regeneration tower 9 , so that the adsorbent discharged from the first discharge port 802 can be added into the regeneration tower 9 .
  • the second conveying device 112 can transport the adsorbent discharged from the second discharge port 902 to the first feed port 801 of the adsorption tower 8 , so as to add the adsorbent discharged from the second discharge port 902 into the adsorption tower 8 .
  • the first conveying device 111 and the second conveying device 112 may be excavators, loaders or other devices capable of conveying materials.
  • the inlet of the preheating section 910 is connected to the second feed port 901
  • the inlet of the regeneration section 920 is connected to the outlet of the preheating section 910
  • the inlet of the cooling section 930 is connected to the outlet of the regeneration section 920
  • the outlet of the cooling section 930 is connected with the second outlet 902 . Therefore, the adsorbent added to the regeneration tower 9 from the second outlet 902 can enter the preheating section 910, the adsorbent in the preheating section 910 can enter the regeneration section 920, and the adsorbent in the regeneration section 920 can enter the cooling section 930 , the adsorbent in the cooling section 930 can be discharged through the second outlet 902 .
  • the preheating section 910 includes a preheating pipe
  • the regeneration section 920 includes a heating pipe and an acid gas outlet 923
  • the cooling section 930 includes a cooling pipe. Therefore, the preheating pipeline can heat the adsorbent in the preheating section 910, thereby preheating the adsorbent, and the heating pipeline can heat the adsorbent in the regeneration section 920, so that the adsorbent in the regeneration section 920 releases acid gas, acid The gas is discharged from the acid gas outlet 923, and the cooling pipe can cool the adsorbent in the cooling section 930, so that the adsorbent can be transported to the adsorption tower 8.
  • the low-temperature desulfurization and denitrification system for cement plant flue gas in the embodiment of the present application further includes a grate cooler 1
  • the rotary kiln 2 also includes an air inlet 201 .
  • the grate cooler 1 includes a first air outlet 101 and a second air outlet 102.
  • the first air outlet 101 communicates with the air inlet 201 of the rotary kiln 2. Therefore, the grate cooler 1 can feed high-temperature air into the rotary kiln 2.
  • the temperature of the air discharged from the first air outlet 101 of the grate cooler 1 is 1000°C-1200°C, so the grate cooler 1 can pass high-temperature air into the rotary kiln 2, which is beneficial to the combustion of the rotary kiln 2 .
  • the preheating pipeline includes a first pipeline inlet 911 and a first pipeline outlet 912, and the first pipeline inlet 911 communicates with the second air outlet 102. Therefore, the grate cooler 1 can enter the preheating pipeline Air is introduced to preheat the adsorbent in the counter preheating section 910 .
  • the temperature of the air discharged from the second air outlet 102 of the grate cooler 1 is 80°C-100°C, so the air that the grate cooler 1 passes into the preheating pipeline can cool the adsorbent in the preheating section 910 to warm up.
  • the low-temperature desulfurization and denitrification system for cement plant flue gas in the embodiment of the present application further includes a preheater 3 and a waste heat boiler 4 .
  • the preheater 3 includes a third flue gas inlet 301 and a third flue gas outlet 302, the third flue gas inlet 301 communicates with the flue gas discharge port 202, therefore, the flue gas discharged from the rotary kiln 2 can pass into the preheater 3,
  • the flue gas can preheat the part that needs to be heated in the preheater 3, and the heat of the flue gas is reduced, and the temperature can be lowered to 300°C-330°C.
  • the waste heat boiler 4 includes a fourth flue gas inlet 401 and a fourth flue gas outlet 402, and the fourth flue gas inlet 401 communicates with the third flue gas outlet 302. Therefore, the flue gas discharged from the preheater 3 It can be passed into the waste heat boiler 4, and the waste heat boiler 4 is heated, and the temperature of the flue gas is also reduced to 180°C-230°C.
  • the fourth flue gas outlet 402 communicates with the first flue gas inlet 701 , so the flue gas discharge port 202 communicates indirectly with the first flue gas inlet 701 . That is to say, the flue gas discharged from the flue gas discharge port 202 of the rotary kiln 2 first enters the preheater 3 for preheating, then enters the waste heat boiler 4 for heat exchange again after heat exchange, and then enters the cooling suction for further cooling.
  • the low-temperature desulfurization and denitrification system for flue gas from a cement plant in the embodiment of the present application lowers the temperature of the flue gas step by step, and can make full use of the heat of the flue gas.
  • the heating pipeline includes a second pipeline inlet 921 and a second pipeline outlet 922 .
  • the second pipe inlet 921 communicates with the fourth flue gas outlet 402 , so the flue gas discharged from the waste heat boiler 4 can be passed into the heating pipe to heat the adsorbent in the regeneration section 920 .
  • the second pipe outlet 922 communicates with the first flue gas inlet 701 , so the flue gas in the heating pipe can pass into the cooling system 7 .
  • the waste heat boiler 4 and the cooling system 7 are connected through a flue gas pipe
  • the second pipe inlet 921 of the heating pipe is connected with the flue gas pipe between the waste heat boiler 4 and the cooling system 7 through a pipe
  • the first pipe inlet 921 of the heating pipe is connected with the flue gas pipe between the waste heat boiler 4 and the cooling system 7
  • the outlet 922 of the second pipeline communicates with the flue gas pipeline between the waste heat boiler 4 and the cooling system 7 through pipelines
  • the connection of the second pipeline inlet 921 of the heating pipeline with the flue gas pipeline between the waste heat boiler 4 and the cooling system 7 is located at In front of the connection between the second pipeline outlet 922 of the heating pipeline and the flue gas pipeline between the waste heat boiler 4 and the cooling system 7 . Therefore, the flue gas discharged from the waste heat boiler 4 can return to the cooling system 7 after entering the heating pipe.
  • the cooling pipeline includes a third pipeline inlet 931 and a third pipeline outlet 932, and the third pipeline inlet 931 communicates with the second flue gas outlet 804, so that the flue gas undergoes adsorption After the tower 8 is adsorbed, it can enter the cooling pipeline, thereby cooling the adsorbent in the cooling section 930 , and then the adsorbent discharged from the cooling section 930 can be transported to the adsorption tower 8 .
  • the temperature inside the adsorption tower 8 is low, so the flue gas discharged from the adsorption tower 8 can cool the adsorbent in the cooling section 930 .
  • the low-temperature desulfurization and denitrification system for cement plant flue gas in the embodiment of the present application also includes a chimney 14, the inlet of the chimney 14 communicates with the third pipe outlet 932 of the cooling pipe, so the flue gas in the cooling pipe is The adsorbent in the cooling section 930 can be discharged through the chimney 14 after being cooled.
  • the low-temperature desulfurization and denitrification system for cement plant flue gas in the embodiment of the present application further includes a raw material grinding system 5 and a dust collector 6 .
  • the raw material grinding system 5 includes a fifth flue gas inlet 501 and a fifth flue gas outlet 502, and the fifth flue gas inlet 501 communicates with the fourth flue gas outlet 402, so the flue gas discharged from the waste heat boiler 4 can enter the raw material grinding system 5, so that raw materials can be dried.
  • the dust collector 6 includes an air inlet 601 and an air outlet 602.
  • the air inlet 601 of the dust collector 6 communicates with each of the fourth flue gas outlet 402 and the fifth flue gas outlet 502, so that the flue gas can be passed into the dust collector.
  • part of the flue gas discharged from the waste heat boiler 4 enters the raw material grinding system 5 to dry raw materials, and then enters the dust collector 6 , and the other part directly enters the dust collector 6 .
  • the gas outlet 602 of the dust collector 6 communicates with the first flue gas inlet 701, so that the flue gas discharge port 202 communicates with the first flue gas inlet 701, that is, the flue gas discharged from the rotary kiln 2 passes through multiple devices and then enters the dust collector 6 Do dusting.
  • the low-temperature desulfurization and denitrification system for cement plant flue gas in the embodiment of the present application further includes a first induced draft fan 12 and a second induced draft fan 13 .
  • the first induced draft fan 12 is arranged between the waste heat boiler 4 and the raw material grinding system 5, the air inlet of the first induced draft fan 12 communicates with the fourth flue gas outlet 402, and the air outlet of the first induced draft fan 12 communicates with the fifth flue gas inlet 501 communicates with each of the air inlets 601 of the dust collector 6, so that the fifth flue gas inlet 501 communicates with the fourth flue gas outlet 402, and the air inlet 601 of the dust collector 6 communicates with the fourth flue gas outlet 402 connected.
  • part of the flue gas discharged from the waste heat boiler 4 enters the raw material grinding system 5 to dry raw materials, and then enters the dust collector 6, while the other part enters the dust collector 6 directly.
  • the low-temperature desulfurization and denitrification system for cement plant flue gas in the embodiment of the present application can remove dust from the flue gas, reduce the amount of dust in the flue gas, and make the dust content in the flue gas reach the standard of 10mg/m3.
  • the air inlet of the second induced draft fan 13 communicates with the acid gas outlet 923 , so the acid gas produced by the regeneration section 920 of the regeneration tower 9 can be discharged.
  • the following describes the denitrification method used in the low-temperature desulfurization and denitrification system for cement plant flue gas according to the embodiment of the present application.
  • the method is realized by relying on the low-temperature desulfurization and denitrification system for cement plant flue gas in the above-mentioned embodiment.
  • the flue gas is passed into the adsorption tower 8 for desulfurization and denitrification;
  • the flue gas discharged from the rotary kiln 2 is passed into the preheater 3 to reduce the temperature of the flue gas from 850°C-1000°C to 300°C-330°C, and then the flue gas is passed into the waste heat boiler 4 to reduce the temperature of the flue gas Reduce to 180°C-230°C, then pass part of the flue gas into the raw material grinding system 5 to dry the raw materials, then remove the dust from the flue gas, and then pass the clean flue gas into the cooling system 7 to reduce the temperature of the flue gas to below 20°C, then the flue gas is passed into the adsorption tower 8 for desulfurization and denitrification, and finally the flue gas is discharged.
  • the low-temperature desulfurization and denitrification system for cement plant flue gas in the embodiment of the present application reduces the temperature of the flue gas discharged from the rotary kiln 2 to 180°C-230°C, and then passes the flue gas into the raw material grinding system 5 to dry the raw materials Therefore, the low-temperature desulfurization and denitrification method for cement plant flue gas in the embodiment of the present application can utilize the waste heat of flue gas.
  • the low-temperature desulfurization and denitrification system for cement plant flue gas in the embodiment of the present application also reduces the temperature of the flue gas to below 20°C, and then passes the flue gas into the adsorption tower 8 for desulfurization and denitrification, which can remove the flue gas
  • the acid gas is fully adsorbed, so that the efficiency of desulfurization and denitrification can be improved.
  • the adsorbent in the adsorption tower 8 is discharged;
  • the adsorbent is sent to the adsorption tower 8.
  • the adsorbent in the adsorption tower 8 is discharged, and the adsorbent is transported to the regeneration tower 9 by the first delivery device 111, and the adsorbent entering the regeneration tower 9 is preheated in the preheating section 910, and then enters the regeneration section 920 Release the adsorbed acid gas, and then enter the cooling section 930 to cool, the adsorbent is discharged after cooling in the cooling section 930, and then the adsorbent is transported to the adsorption tower 8 by the second delivery device 112, and the adsorbent can again absorb the acid gas
  • cooling the adsorbent in the cooling section 930 of the regeneration column 9 comprises:
  • the flue gas is passed into the cooling section 930 of the regeneration tower 9 to cool the adsorbent in the cooling section 930 .
  • the adsorbent in the cooling section 930 is cooled by the low-temperature flue gas discharged from the adsorption tower 8, and the cooling capacity of the flue gas is fully utilized.
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features.
  • the features defined as “first” and “second” may explicitly or implicitly include at least one of these features.
  • “plurality” means at least two, such as two, three, etc., unless otherwise specifically defined.
  • a first feature being "on” or “under” a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch.
  • “above”, “above” and “above” the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature.
  • “Below”, “beneath” and “beneath” the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.
  • the terms “one embodiment,” “some embodiments,” “example,” “specific examples,” or “some examples” mean specific features, structures, materials, or features described in connection with the embodiment or examples. Features are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Analytical Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Treating Waste Gases (AREA)

Abstract

本申请公开了一种用于水泥厂烟气的低温脱硫脱硝系统，包括回转窑、冷却系统、吸附塔和再生塔，烟气排放口与第一烟气进口连通，以便将烟气通入冷却系统内；第一烟气出口与第二烟气进口连通，以便将烟气通入吸附塔内，从而对烟气进行脱硫、脱硝，第一进料口用于向吸附塔内加入吸附剂，第一出料口用于排出吸附塔内的吸附剂；第二进料口用于向再生塔内加入第一出料口排出的吸附剂，第二出料口用于排出再生塔内的吸附剂，预热段用于预热再生塔内的吸附剂，再生段用于制备酸气，冷却段用于冷却再生塔内的吸附剂。本申请的用于水泥厂烟气的低温脱硫脱硝系统能够将烟气温度降到20℃以下再进行脱硫脱硝，脱硝效率高。

Description

用于水泥厂烟气的低温脱硫脱硝系统
交叉引用
本申请要求在2021年9月28日提交中国国家知识产权局、申请号为202122371184.0、发明名称为“用于水泥厂烟气的低温脱硫脱硝系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及烟气处理技术领域，具体地，涉及一种用于水泥厂烟气的低温脱硫脱硝系统。
背景技术
水泥厂的回转窑产生烟气主要包括粉尘和SO x、NO x等酸性气态污染物。相关技术中，水泥厂回转窑的烟气通过SCR脱硝工艺进行脱硝，SCR脱硝工艺需要对应的催化剂，SCR脱硝工艺的脱硝温度通常在160℃-170℃，或者280℃-350℃，烟气在高温条件下的脱硝效率较低。
发明内容
本申请旨在至少在一定程度上解决相关技术中的技术问题之一。
为此，本申请的实施例提出一种用于水泥厂烟气的低温脱硫脱硝系统，该系统能够将烟气温度降到20℃以下再进行脱硫脱硝，脱硝效率高。
根据本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统，包括：
回转窑，所述回转窑包括烟气排放口；
冷却系统，所述冷却系统包括第一烟气进口和第一烟气出口，所述烟气排放口与所述第一烟气进口连通，以便将烟气通入所述冷却系统内，从而将烟气的温度降到20℃以下；
吸附塔，所述吸附塔包括第一进料口、第一出料口和第二烟气进口和第二烟气出口，所述第一烟气出口与所述第二烟气进口连通，以便将所述烟气通入所述吸附塔内，从而对所述烟气进行脱硫、脱硝，所述第一进料口用于向所述吸附塔内加入吸附剂，所述第一出料口用于排出所述吸附塔内的吸附剂；
再生塔，所述再生塔包括第二进料口、预热段、再生段、冷却段和第二出料口，所述第二进料口用于向所述再生塔内加入所述第一出料口排出的吸附剂，所述第二出料口用于排出所述再生塔内的吸附剂，所述预热段用于预热所述再生塔内的吸附剂，所述再生段用于制备酸气，所述冷却段用于冷却所述再生塔内的吸附剂。
根据本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统，能够通过冷却系统将回转窑排出的烟气进行冷却，使烟气温度降低到20℃以下，然后将所述烟气通入吸附塔进行脱硫、脱硝，能够将烟气中的酸性气体充分吸附，从而能够提高脱硫、脱硝效率。
此外，本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统还通过再生塔将吸附塔内的吸附剂用于制备酸气，从而使吸附剂吸附的酸性气体释放，能够将吸附剂再用于吸附烟气中的酸性气体。
在一些实施例中，所述预热段的进口与所述第二进料口相连，以便从所述第二出料口加入所述再生塔内的吸附剂进入所述预热段，所述再生段的进口与所述预热段的出口相连，以便所述预热段内的吸附剂进入所述再生段，所述冷却段的进口与所述再生段的出口相连，以便所述再生段内的吸附剂进入所述冷却段，所述冷却段的出口与所述第二出料口相连，以便所述冷却段内的吸附剂通过所述第二出料口排出。
在一些实施例中，所述预热段包括预热管道，所述预热管道用于加热所述预热段内的吸附剂，所述再生段包括加热管道和酸气出口，所述加热管道用于加热所述再生段内的吸附剂，从而使所述再生段内的吸附剂释放酸气，所述酸气出口用于排出所述酸气，所述冷却段包括冷却管道，所述冷却管道用于冷却所述冷却段内的吸附剂。
在一些实施例中，所述用于水泥厂烟气的低温脱硫脱硝系统还包括篦冷机，所述回转窑还包括空气进口，所述篦冷机包括第一空气出口和第二空气出口，所述第一空气出口与所述回转窑的空气进口连通，以便向所述回转窑内通入高温空气，
所述预热管道包括第一管道进口和第一管道出口，所述第一管道进口与所述第二空气出口连通，以便向所述预热管道内通入空气，从而预热对所述预热段内的吸附剂。
在一些实施例中，所述用于水泥厂烟气的低温脱硫脱硝系统还包括预热器和余热锅炉，所述预热器包括第三烟气进口和第三烟气出口，所述第三烟气进口与所述烟气排放口连通，以便所述烟气通入所述预热器，从而使所述烟气的温度降低到300℃-330℃，
所述余热锅炉包括第四烟气进口和第四烟气出口，所述第四烟气进口与所述第三烟气出口连通，以便所述烟气通入所述余热锅炉，从而使所述烟气的温度降低到180℃-230℃，所述第四烟气出口与所述第一烟气进口连通，以使所述烟气排放口与所述第一烟气进口连通，
所述加热管道包括第二管道进口和第二管道出口，所述第二管道进口与所述第四烟气出口连通，以便将所述烟气通入所述加热管道内，从而加热所述再生段内的吸附剂，所述第二管道出口与所述第一烟气进口连通，从而使所述烟气通入所述冷却系统。
在一些实施例中，所述冷却管道包括第三管道进口和第三管道出口，所述第三管道进口与所述第二烟气出口连通，以便所述烟气进入所述冷却管道，从而冷却所述冷却段内的 吸附剂。
在一些实施例中，所述用于水泥厂烟气的低温脱硫脱硝系统还包括第一运送装置和第二运送装置，所述第一运送装置用于将所述第一出料口排出的吸附剂运送到所述再生塔的所述第二进料口，以便向所述再生塔内加入所述第一出料口排出的吸附剂，
所述第二运送装置用于将所述第二出料口排出的吸附剂运送到所述吸附塔的所述第一进料口，以便向所述吸附塔内加入所述第二出料口排出的吸附剂。
在一些实施例中，所述用于水泥厂烟气的低温脱硫脱硝系统还包括原料粉磨系统和除尘器，所述原料粉磨系统包括第五烟气进口和第五烟气出口，所述第五烟气进口与所述第四烟气出口连通，以使所述烟气进入所述原料粉磨系统，从而烘干原料，
所述除尘器包括进气口和出气口，所述除尘器的进气口与所述第四烟气出口和所述第五烟气出口中的每一者连通，以便将所述烟气通入所述除尘器，
所述除尘器的出气口与所述第一烟气进口连通，以使所述烟气排放口与所述第一烟气进口连通。
在一些实施例中，所述用于水泥厂烟气的低温脱硫脱硝系统还包括第一引风机和第二引风机，所述第一引风机设在所述余热锅炉和所述原料粉磨系统之间，所述第一引风机的进风口与所述第四烟气出口连通，所述第一引风机的出风口与所述第五烟气进口和所述除尘器的进气口中的每一者连通，从而使所述第五烟气进口与所述第四烟气出口连通，且所述除尘器的进气口与所述第四烟气出口连通，所述第二引风机的进风口与所述酸气出口连通，以便将所述酸气排出。
在一些实施例中，所述用于水泥厂烟气的低温脱硫脱硝系统还包括烟筒，所述烟筒的进口与所述冷却管道的所述第三管道出口连通，以便排放所述烟气。
附图说明
图1是本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统的示意图。
图2是本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统的部分结构示意图。
附图标记：
篦冷机1；第一空气出口101；第二空气出口102；
回转窑2；空气进口201；烟气排放口202；
预热器3；第三烟气进口301；第三烟气出口302；
余热锅炉4；第四烟气进口401；第四烟气出口402；
原料粉磨系统5；第五烟气进口501；第五烟气出口502；
除尘器6；进气口601；出气口602；
冷却系统7；第一烟气进口701；第一烟气出口702；
吸附塔8；第一进料口801、第一出料口802；第二烟气进口803；第二烟气出口804；
再生塔9；第二进料口901；第二出料口902；
预热段910；第一管道进口911；第一管道出口912；
再生段920；酸气出口923；第二管道进口921；第二管道出口922；
冷却段930；第三管道进口931；第三管道出口932；
第一运送装置111；
第二运送装置112；
第一引风机12；
第二引风机13；
烟筒14。
具体实施方式
下面详细描述本申请的实施例，所述实施例的示例在附图中示出。下面通过参考附图描述的实施例是示例性的，旨在用于解释本申请，而不能理解为对本申请的限制。
下面参考附图描述本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统。
如图1所示，根据本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统，包括回转窑2、冷却系统7、吸附塔8和再生塔9。
回转窑2包括烟气排放口202，冷却系统7包括第一烟气进口701和第一烟气出口702烟气排放口202与第一烟气进口701连通，因此回转窑2排出的烟气能够通入冷却系统7内，烟气经过冷却系统7冷却后，温度降到20℃以下。
吸附塔8包括第一进料口801、第一出料口802和第二烟气进口803和第二烟气出口804，第一烟气出口702与第二烟气进口803连通，因此降温后的烟气能够通入吸附塔8内，吸附塔8对烟气进行低温脱硫、脱硝，能够提高烟气的脱硫率和脱硝率。
再生塔9包括第二进料口901、预热段910、再生段920、冷却段930和第二出料口902，第二进料口901、预热段910、再生段920、冷却段930和第二出料口902从上至下依次设置。第一进料口801用于向吸附塔8内加入吸附剂，第一出料口802用于排出吸附塔8内的吸附剂。第二进料口901用于向再生塔9内加入第一出料口802排出的吸附剂，第二出料口902用于排出再生塔9内的吸附剂，预热段910用于预热再生塔9内的吸附剂，再生段920用于制备酸气，冷却段930用于冷却再生塔9内的吸附剂。
可以理解的是，吸附塔8内的吸附剂从第一出料口802排出后输送到再生塔9的第二进料口901，吸附剂能够在再生塔9内将吸附的酸性气体(酸性气态污染物)释放，从而用于制备酸气。
具体地，进入再生塔9的吸附剂在预热段910内预热，然后进入再生段920释放吸附 的酸性气体，再进入到冷却段930冷却，吸附剂在冷却段930冷却后能够输送到吸附塔8内再次吸附烟气中的酸性气体。
根据本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统，能够通过冷却系统7将回转窑2排出的烟气进行冷却，使烟气温度降低到20℃以下，然后将烟气通入吸附塔8进行脱硫、脱硝，能够将烟气中的酸性气体充分吸附，从而能够提高脱硫、脱硝效率。
此外，本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统还通过再生塔9将吸附塔8内的吸附剂用于制备酸气，从而使吸附剂吸附的酸性气体释放，能够将吸附剂再用于吸附烟气中的酸性气体。
如图1和图2所示，本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统还包括第一运送装置111和第二运送装置112。第一运送装置111能够将第一出料口802排出的吸附剂运送到再生塔9的第二进料口901，从而能够向再生塔9内加入第一出料口802排出的吸附剂。第二运送装置112能够将第二出料口902排出的吸附剂运送到吸附塔8的第一进料口801，从而向吸附塔8内加入第二出料口902排出的吸附剂。可以理解的是，第一运送装置111和第二运送装置112可以为挖掘机、装载机或者其它能够运送物料的装置。
如图1和图2所示，预热段910的进口与第二进料口901相连，再生段920的进口与预热段910的出口相连，冷却段930的进口与再生段920的出口相连，冷却段930的出口与第二出料口902相连。因此，从第二出料口902加入再生塔9内的吸附剂能够进入预热段910，预热段910内的吸附剂能够进入再生段920，再生段920内的吸附剂能够进入冷却段930，冷却段930内的吸附剂能够通过第二出料口902排出。
在一些实施例中，预热段910包括预热管道，再生段920包括加热管道和酸气出口923，冷却段930包括冷却管道。因此，预热管道能够加热预热段910内的吸附剂，从而对吸附剂进行预热，加热管道能够加热再生段920内的吸附剂，从而使再生段920内的吸附剂释放酸气，酸气从酸气出口923排出，冷却管道能够冷却冷却段930内的吸附剂，从而使吸附剂能够输送到吸附塔8中。
在一些实施例中，如图1所示，本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统还包括篦冷机1，回转窑2还包括空气进口201。篦冷机1包括第一空气出口101和第二空气出口102，第一空气出口101与回转窑2的空气进口201连通，因此，篦冷机1能够向回转窑2内通入高温空气。
可以理解的是，篦冷机1的第一空气出口101排出的空气温度为1000℃-1200℃，因此篦冷机1能够向回转窑2内通入高温空气，有利于回转窑2的燃烧。
如图1和图2所示，预热管道包括第一管道进口911和第一管道出口912，第一管道进口911与第二空气出口102连通，因此，篦冷机1能够向预热管道内通入空气，从而预热 对预热段910内的吸附剂。
可以理解的是，篦冷机1的第二空气出口102排出的空气温度为80℃-100℃，因此篦冷机1向预热管道内通入的空气能够对预热段910内的吸附剂进行预热。
在一些实施例中，如图1所示，本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统还包括预热器3和余热锅炉4。预热器3包括第三烟气进口301和第三烟气出口302，第三烟气进口301与烟气排放口202连通，因此，回转窑2排出的烟气能够通入预热器3，烟气在预热器3内能够对需要加热的部分进行预热，而且烟气的热量减少，温度能够降低到300℃-330℃。
如图1所示，余热锅炉4包括第四烟气进口401和第四烟气出口402，第四烟气进口401与第三烟气出口302连通，因此，从预热器3排出的烟气能够通入余热锅炉4，且对余热锅炉4进行加热，烟气的温度也降低到180℃-230℃。
第四烟气出口402与第一烟气进口701连通，从而烟气排放口202与第一烟气进口701间接连通。也就是说，回转窑2的烟气排放口202排出的烟气先进入预热器3进行预热，进行热交换后进入余热锅炉4再次进行换热，然后进入冷却吸引进一步降温冷却。
因此，本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统将烟气逐级降温，能够充分利用烟气的热量。
如图1和图2所示，加热管道包括第二管道进口921和第二管道出口922。第二管道进口921与第四烟气出口402连通，因此能够将余热锅炉4排出的烟气通入加热管道内，从而加热再生段920内的吸附剂。
第二管道出口922与第一烟气进口701连通，因此，加热管道内的烟气能够通入冷却系统7。
可以理解的是，余热锅炉4和冷却系统7之间通过烟气管道连通，加热管道的第二管道进口921与余热锅炉4和冷却系统7之间的烟气管道通过管道连通，加热管道的第二管道出口922与余热锅炉4和冷却系统7之间的烟气管道通过管道连通，而且，加热管道的第二管道进口921与余热锅炉4和冷却系统7之间的烟气管道的连通处位于加热管道的第二管道出口922与余热锅炉4和冷却系统7之间的烟气管道的连通处的前方。因此，余热锅炉4排出的烟气进入加热管道后能够再返回到冷却系统7内。
在一些实施例中，如图1和图2所示，冷却管道包括第三管道进口931和第三管道出口932，第三管道进口931与第二烟气出口804连通，因此，烟气经过吸附塔8吸附后能够进入冷却管道，从而对冷却段930内的吸附剂进行冷却，进而能够将冷却段930排出的吸附剂运送到吸附塔8内。
可以理解的是，吸附塔8内的温度较低，因此从吸附塔8排出的烟气能够对冷却段930 内的吸附剂进行冷却。
如图1所示，本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统还包括烟筒14，烟筒14的进口与冷却管道的第三管道出口932连通，因此冷却管道内的烟气对冷却段930内的吸附剂冷却后能够通过烟筒14排放。
在一些实施例中，如图1所示，本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统还包括原料粉磨系统5和除尘器6。原料粉磨系统5包括第五烟气进口501和第五烟气出口502，第五烟气进口501与第四烟气出口402连通，因此从余热锅炉4排出的烟气能够进入原料粉磨系统5，从而能够烘干原料。
除尘器6包括进气口601和出气口602，除尘器6的进气口601与第四烟气出口402和第五烟气出口502中的每一者连通，因此能够将烟气通入除尘器6。
可以理解的是，从余热锅炉4排出的烟气的一部分进入原料粉磨系统5烘干原料，然后再进入除尘器6，另一部分直接进入除尘器6。
除尘器6的出气口602与第一烟气进口701连通，以使烟气排放口202与第一烟气进口701连通，即回转窑2排出的烟气经过多个设备后再进入除尘器6进行除尘。
如图1所示，本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统还包括第一引风机12和第二引风机13。第一引风机12设在余热锅炉4和原料粉磨系统5之间，第一引风机12的进风口与第四烟气出口402连通，第一引风机12的出风口与第五烟气进口501和除尘器6的进气口601中的每一者连通，从而使第五烟气进口501与第四烟气出口402连通，且除尘器6的进气口601与第四烟气出口402连通。可以理解的是，从余热锅炉4排出的烟气在第一引风机12的作用下，一部分进入原料粉磨系统5烘干原料，然后再进入除尘器6，另一部分直接进入除尘器6。
因此，本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统能够将烟气进行除尘，降低烟气中的粉尘量，使烟气中的粉尘含量达到10mg/m3的标准。
第二引风机13的进风口与酸气出口923连通，因此能够将再生塔9的再生段920制备的酸气排出。
下面描述本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统的脱硝方法。该方法依靠上述实施例的用于水泥厂烟气的低温脱硫脱硝系统实现。
本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统的脱硝方法包括以下步骤：
将回转窑2排出的烟气的温度降到180℃-230℃；
将烟气通入原料粉磨系统5；
将烟气进行除尘；
将烟气的温度降到20℃以下；
将烟气通入吸附塔8进行脱硫、脱硝；
将烟气排放。
具体地，将回转窑2排出的烟气通入预热器3，使烟气温度从850℃-1000℃降低到300℃-330℃，再将烟气通入余热锅炉4，使烟气温度降低到180℃-230℃，然后将部分烟气通入原料粉磨系统5烘干原料，再将烟气进行除尘，然后将洁净的烟气通入冷却系统7，使烟气的温度降到20℃以下，然后将烟气通入吸附塔8进行脱硫、脱硝，最后将烟气排放。
本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统将回转窑2排出的烟气的温度降到180℃-230℃，再将烟气通入原料粉磨系统5对原料进行烘干，因此，本申请实施例的用于水泥厂烟气的低温脱硫脱硝方法能够利用烟气余热。
此外，本申请实施例的用于水泥厂烟气的低温脱硫脱硝系统还将烟气的温度降到20℃以下，然后将烟气通入吸附塔8进行脱硫、脱硝，能够将烟气中的酸性气体充分吸附，从而能够提高脱硫、脱硝效率。
在一些实施例中，在将烟气通入吸附塔8进行脱硫、脱硝之后，
将吸附塔8中的吸附剂排出；
将排出的吸附剂送入再生塔9制酸气；
将再生塔9的冷却段930中的吸附剂冷却；
将冷却段930中的吸附剂排出；
将吸附剂送入吸附塔8中。
具体地，将吸附塔8中的吸附剂排出，通过第一运送装置111将吸附剂运送到再生塔9内，进入再生塔9的吸附剂在预热段910内预热，然后进入再生段920释放吸附的酸性气体，再进入到冷却段930冷却，吸附剂在冷却段930冷却后排出，然后利用第二运送装置112将吸附剂输送到吸附塔8内，吸附剂能够再次吸附烟气中的酸性气体
在一些实施例中，将再生塔9的冷却段930中的吸附剂冷却包括：
在将烟气通入吸附塔8进行脱硫、脱硝之后，在将烟气排放之前，将烟气通入再生塔9的冷却段930中，以便冷却冷却段930中的吸附剂。
也就是说，利用吸附塔8排出的低温烟气对冷却段930中的吸附剂进行冷却，充分利用烟气的冷量。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申 请的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。在本申请的描述中，“多个”的含义是至少两个，例如两个，三个等，除非另有明确具体的限定。
在本申请中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接或彼此可通讯；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征“上”或“下”可以是第一和第二特征直接接触，或第一和第二特征通过中间媒介间接接触。而且，第一特征在第二特征“之上”、“上方”和“上面”可是第一特征在第二特征正上方或斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”可以是第一特征在第二特征正下方或斜下方，或仅仅表示第一特征水平高度小于第二特征。
在本申请中，术语“一个实施例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不必须针对的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任一个或多个实施例或示例中以合适的方式结合。此外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。
尽管上面已经示出和描述了本申请的实施例，可以理解的是，上述实施例是示例性的，不能理解为对本申请的限制，本领域的普通技术人员在本申请的范围内可以对上述实施例进行变化、修改、替换和变型。

Claims (10)

  1. 一种用于水泥厂烟气的低温脱硫脱硝系统，其特征在于，包括：
    回转窑，所述回转窑包括烟气排放口；
    冷却系统，所述冷却系统包括第一烟气进口和第一烟气出口，所述烟气排放口与所述第一烟气进口连通，以便将烟气通入所述冷却系统内，从而将烟气的温度降到20℃以下；
    吸附塔，所述吸附塔包括第一进料口、第一出料口和第二烟气进口和第二烟气出口，所述第一烟气出口与所述第二烟气进口连通，以便将所述烟气通入所述吸附塔内，从而对所述烟气进行脱硫、脱硝，所述第一进料口用于向所述吸附塔内加入吸附剂，所述第一出料口用于排出所述吸附塔内的吸附剂；
    再生塔，所述再生塔包括第二进料口、预热段、再生段、冷却段和第二出料口，所述第二进料口用于向所述再生塔内加入所述第一出料口排出的吸附剂，所述第二出料口用于排出所述再生塔内的吸附剂，所述预热段用于预热所述再生塔内的吸附剂，所述再生段用于制备酸气，所述冷却段用于冷却所述再生塔内的吸附剂。
  2. 根据权利要求1所述的用于水泥厂烟气的低温脱硫脱硝系统，其特征在于，所述预热段的进口与所述第二进料口相连，以便从所述第二出料口加入所述再生塔内的吸附剂进入所述预热段，所述再生段的进口与所述预热段的出口相连，以便所述预热段内的吸附剂进入所述再生段，所述冷却段的进口与所述再生段的出口相连，以便所述再生段内的吸附剂进入所述冷却段，所述冷却段的出口与所述第二出料口相连，以便所述冷却段内的吸附剂通过所述第二出料口排出。
  3. 根据权利要求1所述的用于水泥厂烟气的低温脱硫脱硝系统，其特征在于，所述预热段包括预热管道，所述预热管道用于加热所述预热段内的吸附剂，所述再生段包括加热管道和酸气出口，所述加热管道用于加热所述再生段内的吸附剂，从而使所述再生段内的吸附剂释放酸气，所述酸气出口用于排出所述酸气，所述冷却段包括冷却管道，所述冷却管道用于冷却所述冷却段内的吸附剂。
  4. 根据权利要求3所述的用于水泥厂烟气的低温脱硫脱硝系统，其特征在于，还包括篦冷机，所述回转窑还包括空气进口，所述篦冷机包括第一空气出口和第二空气出口，所述第一空气出口与所述回转窑的空气进口连通，以便向所述回转窑内通入高温空气，
    所述预热管道包括第一管道进口和第一管道出口，所述第一管道进口与所述第二空气出口连通，以便向所述预热管道内通入空气，从而预热对所述预热段内的吸附剂。
  5. 根据权利要求3所述的用于水泥厂烟气的低温脱硫脱硝系统，其特征在于，还包括预热器和余热锅炉，所述预热器包括第三烟气进口和第三烟气出口，所述第三烟气进口与所述烟气排放口连通，以便所述烟气通入所述预热器，从而使所述烟气的温度降低到300℃ -330℃，
    所述余热锅炉包括第四烟气进口和第四烟气出口，所述第四烟气进口与所述第三烟气出口连通，以便所述烟气通入所述余热锅炉，从而使所述烟气的温度降低到180℃-230℃，所述第四烟气出口与所述第一烟气进口连通，以使所述烟气排放口与所述第一烟气进口连通，
    所述加热管道包括第二管道进口和第二管道出口，所述第二管道进口与所述第四烟气出口连通，以便将所述烟气通入所述加热管道内，从而加热所述再生段内的吸附剂，所述第二管道出口与所述第一烟气进口连通，从而使所述烟气通入所述冷却系统。
  6. 根据权利要求4所述的用于水泥厂烟气的低温脱硫脱硝系统，其特征在于，所述冷却管道包括第三管道进口和第三管道出口，所述第三管道进口与所述第二烟气出口连通，以便所述烟气进入所述冷却管道，从而冷却所述冷却段内的吸附剂。
  7. 根据权利要求1-6中任一项所述的用于水泥厂烟气的低温脱硫脱硝系统，其特征在于，还包括第一运送装置和第二运送装置，所述第一运送装置用于将所述第一出料口排出的吸附剂运送到所述再生塔的所述第二进料口，以便向所述再生塔内加入所述第一出料口排出的吸附剂，
    所述第二运送装置用于将所述第二出料口排出的吸附剂运送到所述吸附塔的所述第一进料口，以便向所述吸附塔内加入所述第二出料口排出的吸附剂。
  8. 根据权利要求5所述的用于水泥厂烟气的低温脱硫脱硝系统，其特征在于，还包括原料粉磨系统和除尘器，所述原料粉磨系统包括第五烟气进口和第五烟气出口，所述第五烟气进口与所述第四烟气出口连通，以使所述烟气进入所述原料粉磨系统，从而烘干原料，
    所述除尘器包括进气口和出气口，所述除尘器的进气口与所述第四烟气出口和所述第五烟气出口中的每一者连通，以便将所述烟气通入所述除尘器，
    所述除尘器的出气口与所述第一烟气进口连通，以使所述烟气排放口与所述第一烟气进口连通。
  9. 根据权利要求8所述的用于水泥厂烟气的低温脱硫脱硝系统，其特征在于，还包括第一引风机和第二引风机，所述第一引风机设在所述余热锅炉和所述原料粉磨系统之间，所述第一引风机的进风口与所述第四烟气出口连通，所述第一引风机的出风口与所述第五烟气进口和所述除尘器的进气口中的每一者连通，从而使所述第五烟气进口与所述第四烟气出口连通，且所述除尘器的进气口与所述第四烟气出口连通，所述第二引风机的进风口与所述酸气出口连通，以便将所述酸气排出。
  10. 根据权利要求6所述的用于水泥厂烟气的低温脱硫脱硝系统，其特征在于，还包括烟筒，所述烟筒的进口与所述冷却管道的所述第三管道出口连通，以便排放所述烟气。
PCT/CN2022/102473 2021-09-28 2022-06-29 用于水泥厂烟气的低温脱硫脱硝系统 WO2023050943A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202122371184.0U CN215876789U (zh) 2021-09-28 2021-09-28 用于水泥厂烟气的低温脱硫脱硝系统
CN202122371184.0 2021-09-28

Publications (1)

Publication Number Publication Date
WO2023050943A1 true WO2023050943A1 (zh) 2023-04-06

Family

ID=80472622

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/102473 WO2023050943A1 (zh) 2021-09-28 2022-06-29 用于水泥厂烟气的低温脱硫脱硝系统

Country Status (2)

Country Link
CN (1) CN215876789U (zh)
WO (1) WO2023050943A1 (zh)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116351207A (zh) * 2023-06-01 2023-06-30 中国华能集团清洁能源技术研究院有限公司 具有烟气冷却功能的低温烟气吸附塔和吸附方法
CN116371142A (zh) * 2023-06-01 2023-07-04 中国华能集团清洁能源技术研究院有限公司 烟气低温吸附再生系统和吸附剂加热输送装置
CN117065517A (zh) * 2023-10-13 2023-11-17 中国华能集团清洁能源技术研究院有限公司 具有交叉床层的错流低温吸附塔和低温烟气吸附系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN215876789U (zh) * 2021-09-28 2022-02-22 中国华能集团清洁能源技术研究院有限公司 用于水泥厂烟气的低温脱硫脱硝系统
CN117282421B (zh) * 2023-11-23 2024-03-08 中国华能集团清洁能源技术研究院有限公司 具有气流定向汇集功能的吸附剂再生塔及吸附剂再生系统

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101832717A (zh) * 2010-04-20 2010-09-15 华南理工大学 一种带独立式省煤器的窑尾余热锅炉及余热回收系统
CN109173570A (zh) * 2018-10-16 2019-01-11 联峰钢铁（张家港）有限公司 一种烟气脱硫脱硝系统
US20190329152A1 (en) * 2015-05-21 2019-10-31 Gradiant Corporation Humidification-dehumidification desalination systems and methods
CN111841066A (zh) * 2020-08-14 2020-10-30 中国华能集团清洁能源技术研究院有限公司 一种烟气中酸性气体脱除系统及方法
CN211950615U (zh) * 2020-02-28 2020-11-17 天瑞集团光山水泥有限公司 水泥熟料余热回收发电系统
CN215876789U (zh) * 2021-09-28 2022-02-22 中国华能集团清洁能源技术研究院有限公司 用于水泥厂烟气的低温脱硫脱硝系统

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101832717A (zh) * 2010-04-20 2010-09-15 华南理工大学 一种带独立式省煤器的窑尾余热锅炉及余热回收系统
US20190329152A1 (en) * 2015-05-21 2019-10-31 Gradiant Corporation Humidification-dehumidification desalination systems and methods
CN109173570A (zh) * 2018-10-16 2019-01-11 联峰钢铁（张家港）有限公司 一种烟气脱硫脱硝系统
CN211950615U (zh) * 2020-02-28 2020-11-17 天瑞集团光山水泥有限公司 水泥熟料余热回收发电系统
CN111841066A (zh) * 2020-08-14 2020-10-30 中国华能集团清洁能源技术研究院有限公司 一种烟气中酸性气体脱除系统及方法
CN215876789U (zh) * 2021-09-28 2022-02-22 中国华能集团清洁能源技术研究院有限公司 用于水泥厂烟气的低温脱硫脱硝系统

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116351207A (zh) * 2023-06-01 2023-06-30 中国华能集团清洁能源技术研究院有限公司 具有烟气冷却功能的低温烟气吸附塔和吸附方法
CN116371142A (zh) * 2023-06-01 2023-07-04 中国华能集团清洁能源技术研究院有限公司 烟气低温吸附再生系统和吸附剂加热输送装置
CN116351207B (zh) * 2023-06-01 2023-08-29 中国华能集团清洁能源技术研究院有限公司 具有烟气冷却功能的低温烟气吸附塔和吸附方法
CN116371142B (zh) * 2023-06-01 2023-10-03 中国华能集团清洁能源技术研究院有限公司 烟气低温吸附再生系统和吸附剂加热输送装置
CN117065517A (zh) * 2023-10-13 2023-11-17 中国华能集团清洁能源技术研究院有限公司 具有交叉床层的错流低温吸附塔和低温烟气吸附系统
CN117065517B (zh) * 2023-10-13 2024-01-30 中国华能集团清洁能源技术研究院有限公司 具有交叉床层的错流低温吸附塔和低温烟气吸附系统

Also Published As

Publication number Publication date
CN215876789U (zh) 2022-02-22

Similar Documents

Publication Publication Date Title
WO2023050943A1 (zh) 用于水泥厂烟气的低温脱硫脱硝系统
WO2023050700A1 (zh) 用于水泥厂烟气的低温脱硫脱硝方法和系统
WO2023050602A1 (zh) 用于钢厂烧结机烟气的低温脱硫脱硝方法和系统
WO2018000888A1 (zh) 防止腐蚀的烟气脱硫脱硝方法和装置
CN102297431B (zh) 一种高含水固体废弃物的解耦燃烧方法和装置
CN104792186A (zh) 一种烧结烟气节能型脱硝系统
CN105698550A (zh) 一种节能减排的烧结烟气净化系统及方法
CN106196100A (zh) 一种节能型有机废气处理系统
WO2023050702A1 (zh) 垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝方法和系统
WO2023050897A1 (zh) 垃圾电厂回转窑燃烧炉烟气低温脱硫脱硝系统
WO2023050896A1 (zh) 用于生物质电厂烟气的低温脱硫脱硝系统
CN113237337A (zh) 废弃物协同处置的水泥生产碳捕集装置及工艺
WO2023050894A1 (zh) 用于焦化厂烟气的低温脱硫脱硝系统
WO2023035492A1 (zh) 一种热量综合利用的烟气净化系统及其工艺
WO2023050699A1 (zh) 用于生物质电厂烟气的低温脱硫脱硝方法和系统
WO2023050895A1 (zh) 用于钢厂烧结机烟气的低温脱硫脱硝系统
CN113200693B (zh) 离线式分解炉与钙循环耦合的水泥生产碳捕集装置及工艺
CN109675921A (zh) 连续有机污染土壤直接热脱附系统及其热脱附方法
CN113120906A (zh) 局部钙循环耦合废弃物处置的水泥生产碳捕集装置及工艺
CN206176412U (zh) 节能型有机废气余热利用装置
CN216770215U (zh) 一种中高硼硅药用玻璃窑炉废气环保治理装置
CN206176411U (zh) 一种节能型有机废气处理装置
CN205328935U (zh) 热解生物质的系统
CN211814593U (zh) 一种不限温scr超低排放的链篦机-回转窑-环冷机
CN107185956A (zh) 一种循环供热系统及其供热方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22874340

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22874340

Country of ref document: EP

Kind code of ref document: A1