Distributed sintering system

Abstract

The utility model provides a distributed sintering system, which relates to the technical field of iron and steel smelting, and comprises a sintering machine and a master control center, the sintering machine is divided into a plurality of areas along the trolley advancing direction of the sintering machine, and a plurality of air boxes, flue gas pipelines and control devices are independently arranged in each area; a traditional large-flue, high-negative-pressure and high-air-volume induced draft sintering technology is improved, in the production process, the needed air volume and air pressure are different, and the traditional large-flue technology is difficult to adjust accurately, and a multi-flue, low-air-volume and low-negative-pressure collecting and distributing type sintering system is adopted, so that the energy consumption is reduced, and the energy consumption is reduced. Adjustment and control can be carried out according to flue gas characteristics and production requirements of different areas in the sintering process, the production quality can be effectively improved, the production energy consumption can be greatly reduced, the unit sinter pollutant emission amount and the total sintering flue gas emission amount are reduced, and a brand new energy-saving and emission-reducing sintering production process is provided for metallurgical production.

Description

Technical Field

[0001] This utility model relates to the field of iron and steel smelting technology, specifically a distributed sintering system. Background Technology

[0002] The sintering process in steel smelting involves first taking various raw materials (concentrates, ore powder, fuel, flux, return ore, and iron-containing production waste, etc.), and then mixing and granulating them in a certain proportion to obtain sintering raw materials that meet the requirements. Then, the raw materials are produced by exhausting air through multiple air boxes in a belt sintering machine. Finally, the sintered ore is obtained by cooling and crushing, and is used as the "refined material" for blast furnace smelting.

[0003] The existing sintering process for producing sintered ore mainly relies on fuel combustion to provide heat. The carbon in the fuel burns sequentially from top to bottom under the influence of a blower, transferring heat and causing the raw materials to bind together into ore. To accelerate the heat exchange process between air and the material layer, the permeability of the sintering raw materials is typically increased, and the exhaust volume of the main blower is also increased. The main problem with the current sintering process is that more than 20 air boxes are centrally connected to a large flue, which is over 100 meters long. Adjusting the airflow and pressure of each air box solely based on the central main blower's exhaust is insufficient for individual control of these parameters. This results in high sintering power consumption, significant energy waste, low production efficiency, and poor production controllability in the steel smelting process. Furthermore, the composition of pollutants in the exhaust gases generated in different areas varies considerably. The existing sintering process transports exhaust gases from different areas to a single exhaust duct for unified treatment, leading to low exhaust gas treatment efficiency and energy waste. Utility Model Content

[0004] The purpose of this invention is to provide a distributed sintering system, which aims to solve the problems in the prior art.

[0005] To achieve the above objectives, one embodiment of this utility model provides a distributed sintering system, including a sintering machine and a central control center. The sintering machine is divided into multiple areas along the trolley's travel direction. Each area independently houses multiple air boxes, flue gas ducts, and control devices. The air boxes are located at the inlet of the flue gas ducts. Each flue gas duct is equipped with a flue gas parameter detection device. A dust collector is installed in the middle section of each flue gas duct, with a flue gas outlet and a dust outlet. An exhaust treatment structure is connected to the flue gas outlet of the dust collector, and the exhaust treatment structure is connected to a chimney. A pneumatic conveying device is connected to the dust outlet, and the pneumatic conveying device is connected to an ash silo. The air boxes, dust collectors, exhaust treatment structures, flue gas parameter detection devices, and pneumatic conveying devices within each area are electrically connected to the control device of the corresponding area. All control devices within the multiple areas are electrically connected to the central control center.

[0006] Preferably, the exhaust treatment structure includes a desulfurization and denitrification device and a fan, wherein the desulfurization and denitrification device and the fan are interconnected.

[0007] Preferably, the sintering machine is divided into six areas along the trolley travel direction: ignition section, pre-sintering section, first calcination section, second calcination section, tail section, and cooling section.

[0008] Preferably, the fan inside at least one area of ​​the tail section and the cooling section is connected to a waste heat power generation device, and the outlet of the waste heat power generation device is connected to a desulfurization and denitrification device inside at least one area of ​​the tail section and the cooling section.

[0009] Preferably, the outlet of the waste heat power generation device is connected to a booster fan, and the inlet of the desulfurization and denitrification device in at least one area of ​​the tail section and the cooling section is connected to the outlet of the booster fan.

[0010] Preferably, the outlet of the air box is connected to the inlet of the dust collector via a flue gas duct and a regulating valve, and the connected air box, flue gas duct, regulating valve and dust collector are located in the same area.

[0011] Preferably, the number of bellows in each area is 2-6.

[0012] Preferably, two adjacent regulating valves located within two adjacent regions are connected by a switching valve.

[0013] Preferably, the dust collector is one or a combination of two of the following: cyclone dust collector, multi-tube dust collector, cartridge dust collector, bag dust collector, and plastic sheet dust collector.

[0014] Preferably, the flue gas parameter detection device includes an oxygen meter, a temperature and humidity meter, a pressure gauge, and a NO meter. x Sensors, SO2 sensors, CO sensors and CO2 sensors.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. This utility model improves upon the traditional large flue, high negative pressure, and high air volume exhaust sintering process. During production, the required air volume and pressure vary, making it difficult to accurately adjust using traditional large flue technology. This utility model adopts a distributed sintering system with multiple flues, low air volume, and low negative pressure. It can be adjusted and controlled according to the flue gas characteristics and production needs of different areas during the sintering process. This not only effectively improves product quality but also significantly reduces production energy consumption, lowers the pollutant emissions per unit of sintered ore, and reduces the total emissions of sintered flue gas, providing a brand-new energy-saving and emission-reducing sintering production process for metallurgical production.

[0017] 2. The distributed sintering system provided by this utility model uses an intelligent control method to intelligently regulate the air box, regulating valve, dust collector, fan, and desulfurization and denitrification device based on the performance parameters of the flue gas detected by the flue gas parameter detection device. The control center also regulates the control devices in each area, achieving the goal of both "centralized management" and "distributed control" as needed.

[0018] 3. In the distributed sintering system provided by this utility model, if one piece of equipment fails, other adjacent equipment can replace the failed equipment and continue production, resulting in strong production stability. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the distributed sintering system in Example 1;

[0020] Figure 2 This is a schematic diagram of the distributed sintering system in Example 2.

[0021] In the diagram: 1. Sintering machine; 2. Air box; 3. Flue gas parameter detection device; 4. Flue gas pipeline; 5. Regulating valve; 6. Dust collector; 7. Desulfurization and denitrification device; 8. Fan; 9. Control device; 10. Central control center; 11. Waste heat power generation device; 12. Pneumatic conveying device; 13. Ash silo; 14. Chimney; 15. Booster fan. Detailed Implementation

[0022] The present invention will now be further described with reference to the accompanying drawings.

[0023] Example 1:

[0024] like Figure 1As shown, a distributed sintering system includes a sintering machine 1 and a central control center 10. The sintering machine 1 is divided into multiple areas along the trolley's travel direction. Each area independently houses multiple air boxes 2, flue gas ducts 4, and control devices 9. The air boxes 2 are located at the inlet of the flue gas ducts 4. Each flue gas duct 4 is equipped with a flue gas parameter detection device 3. Dust collectors 6 are installed in the middle sections of each flue gas duct 4. Each dust collector 6 has a flue gas outlet and a dust outlet. An exhaust treatment structure is connected to the flue gas outlet of the dust collector 6, and a chimney 14 is connected to the exhaust treatment structure. A pneumatic conveying device 12 is connected to the dust outlet, and an ash silo 13 is connected to the pneumatic conveying device 12. The air boxes 2 and dust collectors 9 within each area... The exhaust treatment structure, flue gas parameter detection device 3, and pneumatic conveying device 12 are all electrically connected to the control device 9 of the corresponding area. The control devices 9 in multiple areas are all electrically connected to the central control center 10. The exhaust treatment structure includes a desulfurization and denitrification device 7 and a fan 8. The desulfurization and denitrification device 7 and the fan 8 are interconnected. The flue gas outlet of the dust collector 6 is connected to the inlet of the desulfurization and denitrification device 7. The outlet of the desulfurization and denitrification device 7 is connected to the inlet of the fan 8. The desulfurization and denitrification device 7 selects one or more of the following methods according to the flue gas characteristics of its respective area: ozone oxidation desulfurization and denitrification, activated carbon deammoniation and denitrification, SCR selective catalytic reduction, and zeolite catalytic combustion desulfurization and denitrification. The outlet of the fan 8 is connected to the chimney 14 through a pipe.

[0025] Along the trolley travel direction of sintering machine 1, sintering machine 1 is divided into six areas: ignition section, pre-firing section, first calcination section, second calcination section, tail section, and cooling section. There are 23 air boxes 2 under the trolley of sintering machine 1. Air boxes 2 A-D are for the ignition section, air boxes 2 E-H are for the pre-firing section, air boxes 2 I-L are for the first calcination section, air boxes 2 M-P are for the second calcination section, air boxes 2 Q-T are for the tail section, and air boxes 2 U-W are for the cooling section. Air boxes 2 A-W are equipped with flue gas parameter detection devices 3. The air pressure and air volume of air boxes 2 A-W can be adjusted according to the flue gas performance data detected by the flue gas parameter detection devices 3. Air boxes 2 A-W are connected to the dust collectors 6 of the corresponding areas through flue gas ducts 4. Regulating valves 5 are installed on the flue gas ducts 4.

[0026] In the ignition section, the outlets of air boxes A-D 2 are connected to the inlet of dust collector A1 6 via flue gas duct 4. Dust collector A1 6 has two outlets: the first outlet of dust collector A1 6 is connected to the inlet of desulfurization and denitrification device T1 7, and the second outlet of dust collector A1 6 is connected to the inlet of pneumatic conveying device 12. The outlet of desulfurization and denitrification device T1 7 is connected to the inlet of fan F1 8, and the outlet of pneumatic conveying device 12 is connected to ash silo 13. Fan F1 8... The outlet is connected to the chimney 14 via a pipeline. Dust collector A1 6, desulfurization and denitrification device T1 7 and fan F1 8 are connected in a longitudinal straight-in manner. Dust collector A1 6 is a plastic plate dust collector. Desulfurization and denitrification device T1 7 adopts ozone oxidation desulfurization and denitrification method. The air boxes A-D 2, dust collector A1 6, desulfurization and denitrification device T1 7, fan F1 8, flue gas parameter detection device 3, regulating valve 5 and pneumatic conveying device 12 in the ignition section are electrically connected to control device K1 9.

[0027] In the pre-combustion section, the outlets of air boxes E-H 2 are connected to the inlet of dust collector A2 6 via flue gas duct 4. Dust collector A2 6 has two outlets: the first outlet is connected to the inlet of desulfurization and denitrification device T2 7, and the second outlet is connected to the inlet of pneumatic conveying device 12. The outlet of desulfurization and denitrification device T2 7 is connected to the inlet of fan F2 8, and the outlet of pneumatic conveying device 12 is connected to ash silo 13. Fan F2 8... The outlet is connected to the chimney 14 via a pipeline. Dust collector A2 6, desulfurization and denitrification device T2 7 and fan F2 8 are connected in a longitudinal straight-in manner. Dust collector A2 6 is a plastic plate dust collector. Desulfurization and denitrification device T2 7 adopts ozone oxidation desulfurization and denitrification method. The E-H wind boxes 2, dust collector A2 6, desulfurization and denitrification device T2 7, fan F2 8, flue gas parameter detection device 3, regulating valve 5 and pneumatic conveying device 12 in the pre-combustion section are electrically connected to control device K2 9.

[0028] In the calcination section, the outlets of wind boxes 2 (I-L) are connected to the inlet of dust collector 6 (A3) via flue gas duct 4. Dust collector 6 (A3) has two outlets: the first outlet is connected to the inlet of desulfurization and denitrification device 7 (T3), and the second outlet is connected to the inlet of pneumatic conveying device 12. The outlet of desulfurization and denitrification device 7 (T3) is connected to the inlet of fan 8 (F3). The outlet of pneumatic conveying device 12 is connected to ash silo 13. The outlet of fan 8 (F3) is connected to chimney 1 via a duct. 4. Dust collector A3 (6), desulfurization and denitrification device T3 (7), and fan F3 (8) are connected in a longitudinal straight-in manner. Dust collector A3 (6) is a two-stage dust collector, with the first stage being a cyclone dust collector and the second stage being a cartridge dust collector. Desulfurization and denitrification device T3 (7) adopts ozone oxidation desulfurization and denitrification method. The I-L wind boxes 2 of the calcination section, dust collector A3 (6), desulfurization and denitrification device T3 (7), fan F3 (8), flue gas parameter detection device 3, regulating valve 5, and pneumatic conveying device 12 are electrically connected to control device K3 (9).

[0029] In the second calcination stage, the outlets of the M-P wind boxes 2 are connected to the inlet of the A4 dust collector 6 via flue gas duct 4. The A4 dust collector 6 has two outlets: the first outlet is connected to the inlet of the T4 desulfurization and denitrification device 7, and the second outlet is connected to the inlet of the pneumatic conveying device 12. The outlet of the T4 desulfurization and denitrification device 7 is connected to the inlet of the F4 fan 8. The outlet of the pneumatic conveying device 12 is connected to the ash silo 13, and the outlet of the F4 fan 8 is connected to the chimney 14 via a duct. The A4 dust collector 6, the T4 desulfurization and denitrification device 7, and the F4 fan 8 are connected in a longitudinal straight-in manner. The A4 dust collector 6 is a two-stage dust collector, with the first stage being a multi-tube dust collector and the second stage being a bag filter dust collector. The T4 desulfurization and denitrification device 7 adopts the zeolite catalytic combustion desulfurization and denitrification method. The M-P wind boxes 2 of the calcination section, the A4 dust collector 6, the T4 desulfurization and denitrification device 7, the F4 fan 8, the flue gas parameter detection device 3, the regulating valve 5, and the pneumatic conveying device 12 are electrically connected to the K4 control device 9.

[0030] At the tail section, the outlets of air boxes Q-T 2 are connected to the inlet of dust collector A5 6 via flue gas duct 4. Dust collector A5 6 has two outlets: the first outlet is connected to the inlet of desulfurization and denitrification device T5 7, and the second outlet is connected to the inlet of pneumatic conveying device 12. The outlet of desulfurization and denitrification device T5 7 is connected to the inlet of fan F5 8, the outlet of pneumatic conveying device 12 is connected to ash silo 13, and the outlet of fan F5 8 is connected to chimney 14 via a duct. The A5 dust collector 6, T5 desulfurization and denitrification device 7, and F5 fan 8 are connected in a longitudinal straight-in manner. The A5 dust collector 6 is a two-stage dust collector, with the first stage being a cyclone dust collector and the second stage being a bag filter dust collector. The T5 desulfurization and denitrification device 7 adopts the zeolite catalytic combustion desulfurization and denitrification method. The Q-T wind box 2, A5 dust collector 6, T5 desulfurization and denitrification device 7, F5 fan 8, flue gas parameter detection device 3, regulating valve 5, and pneumatic conveying device 12 at the tail section are electrically connected to the K5 control device 9.

[0031] In the cooling section, the outlets of the U-W air boxes 2 are connected to the inlet of the A6 dust collector 6 via flue gas duct 4. The A6 dust collector 6 has two outlets: the first outlet is connected to the inlet of the T6 desulfurization and denitrification device 7, and the second outlet is connected to the inlet of the pneumatic conveying device 12. The outlet of the T6 desulfurization and denitrification device 7 is connected to the inlet of the F6 fan 8. The outlet of the pneumatic conveying device 12 is connected to the ash silo 13, and the outlet of the F6 fan 8 is connected to the chimney 14 via a pipe. The A6 dust collector 6, T6 desulfurization and denitrification device 7, and F6 fan 8 are connected in a longitudinal straight-in manner; the A6 dust collector 6 is a two-stage dust collector, the first stage is a multi-tube dust collector, and the second stage is a cartridge dust collector; the T6 desulfurization and denitrification device 7 adopts the zeolite catalytic combustion desulfurization and denitrification method, and the U-W wind boxes 2, A6 dust collector 6, T6 desulfurization and denitrification device 7, F6 fan 8, flue gas parameter detection device 3, regulating valve 5, and pneumatic conveying device 12 in the cooling section are electrically connected to the K6 control device 9.

[0032] Control devices 9, numbered K1 to K6, are electrically connected to the central control center 10, achieving both "centralized management" and "decentralized control" as needed.

[0033] Example 2:

[0034] like Figure 2As shown, a distributed sintering system includes a sintering machine 1 and a central control center 10. The sintering machine 1 is divided into multiple areas along the trolley's travel direction. Each area independently houses multiple air boxes 2, flue gas ducts 4, and control devices 9. The air boxes 2 are located at the inlet of the flue gas ducts 4. Each flue gas duct 4 is equipped with a flue gas parameter detection device 3. A dust collector 6 is installed in the middle section of each flue gas duct 4. The dust collector 6 has a flue gas outlet and a dust outlet. An exhaust treatment structure is connected to the gas outlet, and a chimney 14 is connected to the exhaust treatment structure. A pneumatic conveying device 12 is connected to the dust outlet, and an ash silo 13 is connected to the pneumatic conveying device 12. The air box 2, dust collector 6, exhaust treatment structure, flue gas parameter detection device 3, and pneumatic conveying device 12 in each area are all electrically connected to the control device 9 of the corresponding area. The control devices 9 in multiple areas are all electrically connected to the central control center 10. The exhaust treatment structure includes a desulfurization and denitrification device 7 and a fan 8. The desulfurization and denitrification device 7 is interconnected with the fan 8. The flue gas outlet of the dust collector 6 is connected to the inlet of the fan 8, and the outlet of the fan 8 is connected to the desulfurization and denitrification device 7. The outlet of the desulfurization and denitrification device 7 is connected to the chimney 14 through a pipeline. The desulfurization and denitrification device 7 selects one or more of the following methods according to the flue gas characteristics of its respective area: ozone oxidation desulfurization and denitrification, activated carbon deammoniation and denitrification, SCR selective catalytic reduction, and zeolite catalytic combustion desulfurization and denitrification. The sintering machine 1 is moved along the trolley travel direction of the sintering machine 1. It is divided into six sections: ignition section, pre-combustion section, calcination section 1, calcination section 2, tail section, and cooling section. The fan 8 in at least one section of the tail section and the cooling section is connected to the waste heat power generation device 11. The outlet of the waste heat power generation device 11 is connected to the desulfurization and denitrification device 7 in at least one section of the tail section and the cooling section. The outlet of the waste heat power generation device 11 is connected to the booster fan 15. The inlet of the desulfurization and denitrification device 7 in at least one section of the tail section and the cooling section is connected to the outlet of the booster fan 15.

[0035] The sintering machine 1 is divided into six areas along the direction of travel of the trolley: ignition section, pre-firing section, first calcination section, second calcination section, tail section, and cooling section. Twenty-three air boxes 2 are installed under the trolley of the sintering machine 1. Air boxes A-D are for the ignition section, air boxes E-H are for the pre-firing section, air boxes I-L are for the first calcination section, air boxes M-P are for the second calcination section, air boxes Q-T are for the tail section, and air boxes U-W are for the cooling section. Each air box 2 (A-W) is equipped with a flue gas parameter detection device 3, which can adjust the air pressure and air volume of air boxes A-W based on the flue gas performance data detected by the device. Air boxes A-W are connected to the dust collectors 6 of their respective areas via flue gas ducts 4, and regulating valves 5 are installed on the flue gas ducts 4.

[0036] In the ignition section, the outlets of air boxes A-D 2 are connected to the inlet of dust collector A1 6 via flue gas duct 4. Dust collector A1 6 has two outlets: the first outlet of dust collector A1 6 is connected to the inlet of desulfurization and denitrification device T1 7, and the second outlet of dust collector A1 6 is connected to the inlet of pneumatic conveying device 12. The outlet of desulfurization and denitrification device T1 7 is connected to the inlet of fan F1 8, and the outlet of pneumatic conveying device 12 is connected to ash silo 13. Fan F1 8... The outlet is connected to the chimney 14 via a pipeline. Dust collector A1 6, desulfurization and denitrification device T1 7 and fan F1 8 are connected in a longitudinal straight-in manner. Dust collector A1 6 is a plastic plate dust collector. Desulfurization and denitrification device T1 7 adopts ozone oxidation desulfurization and denitrification method. The air boxes A-D 2, dust collector A1 6, desulfurization and denitrification device T1 7, fan F1 8, flue gas parameter detection device 3, regulating valve 5 and pneumatic conveying device 12 in the ignition section are electrically connected to control device K1 9.

[0037] In the pre-combustion section, the outlets of air boxes E-H 2 are connected to the inlet of dust collector A2 6 via flue gas duct 4. Dust collector A2 6 has two outlets: the first outlet is connected to the inlet of desulfurization and denitrification device T2 7, and the second outlet is connected to the inlet of pneumatic conveying device 12. The outlet of desulfurization and denitrification device T2 7 is connected to the inlet of blower F2 8, and the outlet of pneumatic conveying device 12 is connected to ash silo 13. The outlet of 8 is connected to the chimney 14. Dust collector 6 (A2), desulfurization and denitrification device 7 (T2), and fan 8 (F2) are connected in a longitudinal straight-in manner. Dust collector 6 (A2) is a plastic plate dust collector. Desulfurization and denitrification device 7 (T2) adopts ozone oxidation desulfurization and denitrification method. The E-H wind boxes 2, dust collector 6, desulfurization and denitrification device 7, fan 8 (F2), flue gas parameter detection device 3, regulating valve 5, and pneumatic conveying device 12 in the pre-burning section are electrically connected to control device 9 (K2).

[0038] In the calcination section, the outlets of wind boxes 2 (I-L) are connected to the inlet of dust collector 6 (A3) via flue gas duct 4. Dust collector 6 (A3) has two outlets: the first outlet is connected to the inlet of desulfurization and denitrification device 7 (T3), and the second outlet is connected to the inlet of pneumatic conveying device 12. The outlet of desulfurization and denitrification device 7 (T3) is connected to the inlet of fan 8 (F3). The outlet of pneumatic conveying device 12 is connected to ash silo 13. The outlet of fan 8 (F3) is connected to chimney 1 via a duct. 4. Dust collector A3 (6), desulfurization and denitrification device T3 (7), and fan F3 (8) are connected in a longitudinal straight-in manner. Dust collector A3 (6) is a two-stage dust collector, with the first stage being a cyclone dust collector and the second stage being a cartridge dust collector. Desulfurization and denitrification device T3 (7) adopts ozone oxidation desulfurization and denitrification method. The I-L wind boxes 2 of the calcination section, dust collector A3 (6), desulfurization and denitrification device T3 (7), fan F3 (8), flue gas parameter detection device 3, regulating valve 5, and pneumatic conveying device 12 are electrically connected to control device K3 (9).

[0039] In the second calcination stage, the outlets of the M-P wind boxes 2 are connected to the inlet of the A4 dust collector 6 via flue gas duct 4. The A4 dust collector 6 has two outlets: the first outlet is connected to the inlet of the T4 desulfurization and denitrification device 7, and the second outlet is connected to the inlet of the pneumatic conveying device 12. The outlet of the T4 desulfurization and denitrification device 7 is connected to the inlet of the F4 fan 8. The outlet of the pneumatic conveying device 12 is connected to the ash silo 13, and the outlet of the F4 fan 8 is connected to the chimney 14 via a duct. The A4 dust collector 6, the T4 desulfurization and denitrification device 7, and the F4 fan 8 are connected in a longitudinal straight-in manner. The A4 dust collector 6 is a two-stage dust collector, with the first stage being a multi-tube dust collector and the second stage being a bag filter dust collector. The T4 desulfurization and denitrification device 7 adopts the zeolite catalytic combustion desulfurization and denitrification method. The M-P wind boxes 2 of the calcination section, the A4 dust collector 6, the T4 desulfurization and denitrification device 7, the F4 fan 8, the flue gas parameter detection device 3, the regulating valve 5, and the pneumatic conveying device 12 are electrically connected to the K4 control device 9.

[0040] At the tail section, the outlets of air boxes Q-T 2 are connected to the inlet of dust collector A5 6 via flue gas duct 4. Dust collector A5 6 has two outlets: the first outlet of dust collector A5 6 is connected to the inlet of fan F5 8, and the second outlet of dust collector A5 6 is connected to the inlet of pneumatic conveying device 12. The outlet of fan F5 8 is connected to the first inlet of waste heat power generation device FD 11, and the outlet of waste heat power generation device FD 11 is connected to the inlet of booster fan F7 15. The outlet of booster fan F7 15 is connected to the inlet of T5 and... The inlet of the T6 desulfurization and denitrification unit 7 is connected, and the outlets of the T5 and T6 desulfurization and denitrification units 7 are connected to the chimney 14 through pipes. The A5 dust collector 6 is a two-stage dust collector, with the first stage being a cyclone dust collector and the second stage being a bag dust collector. The Q-T wind boxes 2, A5 dust collector 6, T5 and T6 desulfurization and denitrification units 7, F5 fan 8, FD waste heat power generation unit 11, F7 booster fan 15, flue gas parameter detection device 3, regulating valve 5 and pneumatic conveying device 12 at the tail section are electrically connected to the K5 control device 9.

[0041] In the cooling section, the outlets of air boxes U-W 2 are connected to the inlet of dust collector A6 6 via flue gas duct 4. Dust collector A6 6 has two outlets: the first outlet of dust collector A6 6 is connected to the inlet of fan F6 8; the outlet of fan F6 8 is connected to the second inlet of waste heat power generation unit FD 11; the outlet of waste heat power generation unit FD 11 is connected to the inlet of booster fan F7 15; and the outlet of booster fan F7 15 is connected to T5 and T... The inlet of the No. 6 desulfurization and denitrification unit 7 is connected, and the outlets of the No. 5 and No. 6 desulfurization and denitrification units 7 are connected to the chimney 14 through pipelines. The No. 6 dust collector is a two-stage dust collector. The first stage is a multi-tube dust collector, and the second stage is a cartridge dust collector. The U-W wind boxes 2 of the cooling section, the No. 6 dust collector, the No. 6 desulfurization and denitrification unit 7, the No. 6 fan 8, the flue gas parameter detection device 3, the regulating valve 5, and the pneumatic conveying device 12 are electrically connected to the No. 6 control device 9.

[0042] Control devices 9, numbered K1 to K6, are electrically connected to the central control center 10, achieving both "centralized management" and "decentralized control" as needed.

[0043] The outlet of the air box 2 is connected to the inlet of the dust collector 6 through the flue gas duct 4 and the regulating valve 5 respectively. The connected air box 2, flue gas duct 4, regulating valve 5 and dust collector 6 are located in the same area.

[0044] The number of bellows 2 in each area is 2-6.

[0045] It should be noted that the number of bellows 2 in each area is preferably 4. When the number of bellows 2 in each area is 2-6, the needs of each area for bellows 2 are met, while avoiding equipment redundancy caused by too many bellows 2.

[0046] Two adjacent regulating valves 5 located within two adjacent areas are connected by a switching valve. The switching valve allows the adjacent air boxes in the adjacent areas to be switched between adjacent areas according to the characteristics of the flue gas and production needs.

[0047] Dust collector 6 is one or a combination of two of the following: cyclone dust collector, multi-tube dust collector, cartridge dust collector, bag dust collector, and plastic plate dust collector. Traditional dust collectors use electrostatic precipitators, which have drawbacks such as high energy consumption, unstable operating efficiency, and high outlet dust concentration, leading to many problems in the subsequent desulfurization and denitrification systems and making it impossible to guarantee stable and compliant low emissions. However, the dust removal methods using cyclone dust collectors, multi-tube dust collectors, cartridge dust collectors, bag dust collectors, and plastic plate dust collectors can avoid the above problems.

[0048] It should be noted that in practical applications, appropriate desulfurization and denitrification methods can be selected based on the parameter characteristics of the flue gas generated in different areas, such as temperature, humidity, nitrogen oxides, and SO2 content.

[0049] The flue gas parameter detection device 3 includes an oxygen meter, a temperature and humidity meter, a pressure gauge, and an NO meter. x Sensors, SO2 sensors, CO sensors and CO2 sensors.

[0050] This invention, through the settings of Embodiments 1 and 2, can divide the sintering machine into multiple zones based on the sintering machine area, sintering process, and sintering flue gas characteristics. Each zone is independently equipped with multiple air boxes 2, flue gas ducts 4, dust collectors 6, fans 8, desulfurization and denitrification devices 7, and control devices 9. It adopts a distributed exhaust sintering process with multiple flue gas ducts. The air volume and pressure in each flue gas duct 4 can be independently and intelligently controlled according to the needs of different zones of the sintering machine 1 through the control device 9, enabling zoned intelligent production control. This avoids the problems of high sintering power consumption, serious energy waste, low production efficiency, and poor production controllability caused by traditional sintering machines that only adjust the air volume and pressure of each air box through a single main fan, and the fact that the air volume and pressure of each air box within each zone are the same. Based on the flue gas characteristics of each area's internal air box 2, dust collectors 6, fans 8, and desulfurization and denitrification devices 7 can be independently set up. Devices that can effectively remove pollutants can be set up according to the types and quantities of pollutants in the flue gas of different areas' air boxes 2, which is more conducive to reducing pollutant emissions and low-carbon green production. Through the joint use of independent control devices 9 and the central control center 10, the data detected by the flue gas parameter detection device 3 is monitored and the air volume and air pressure of multiple air boxes 2, the process parameters of dust collectors 6, the process parameters of fans 8, the process parameters of desulfurization and denitrification devices 7, and the process parameters of pneumatic conveying devices 12 are adjusted. This realizes independent intelligent control of each area and centralized management of the sintering system. Furthermore, through Example 2, the purpose of utilizing the waste heat generated during the operation is realized, avoiding the waste of heat.

[0051] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0052] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A distributed sintering system, characterized in that: The sintering machine (1) includes a sintering machine (1) and a central control center (10). The sintering machine (1) is divided into multiple areas along the trolley's travel direction. Each area is independently equipped with multiple air boxes (2), flue gas ducts (4), and control devices (9). The air boxes (2) are located at the inlet of the flue gas ducts (4). Each of the multiple flue gas ducts (4) is equipped with a flue gas parameter detection device (3). Each of the multiple flue gas ducts (4) has a dust collector (6) in its central area. The dust collector (6) has a flue gas outlet and a dust outlet. The dust collector (6) is connected to an exhaust treatment structure at its flue gas outlet. The exhaust treatment structure is connected to a chimney (14). The dust outlet is connected to a pneumatic conveying device (12). The pneumatic conveying device (12) is connected to an ash hopper (13). The air box (2), dust collector (6), exhaust treatment structure, flue gas parameter detection device (3), and pneumatic conveying device (12) in each area are all electrically connected to the control device (9) of the corresponding area. The control devices (9) in multiple areas are all electrically connected to the central control center (10).

2. The distributed sintering system according to claim 1, characterized in that: The exhaust treatment structure includes a desulfurization and denitrification device (7) and a fan (8), and the desulfurization and denitrification device (7) and the fan (8) are interconnected.

3. A distributed sintering system according to claim 2, characterized in that: The sintering machine (1) is divided into six areas along the trolley travel direction: ignition section, pre-sintering section, calcination section 1, calcination section 2, tail section and cooling section.

4. A distributed sintering system according to claim 3, characterized in that: The fan (8) inside at least one area of ​​the tail section and the cooling section is connected to a waste heat power generation device (11), and the outlet of the waste heat power generation device (11) is connected to a desulfurization and denitrification device (7) inside at least one area of ​​the tail section and the cooling section.

5. A distributed sintering system according to claim 4, characterized in that: The outlet of the waste heat power generation device (11) is connected to a booster fan (15), and the inlet of the desulfurization and denitrification device (7) in at least one area of ​​the tail section and cooling section is connected to the outlet of the booster fan (15).

6. A distributed sintering system according to claim 2, characterized in that: The outlet of the air box (2) is connected to the inlet of the dust collector (6) through the flue gas pipe (4) and the regulating valve (5), respectively. The air box (2), flue gas pipe (4), regulating valve (5) and dust collector (6) are located in the same area.

7. A distributed sintering system according to claim 6, characterized in that: The number of bellows (2) inside each area is 2-6.

8. A distributed sintering system according to claim 6, characterized in that: The two adjacent regulating valves (5) located within the two adjacent areas are connected by a switching valve.

9. A distributed sintering system according to claim 8, characterized in that: The dust collector (6) is one or a combination of two of the following: cyclone dust collector, multi-tube dust collector, cartridge dust collector, bag dust collector and plastic plate dust collector.

10. A distributed sintering system according to claim 9, characterized in that: The flue gas parameter detection device (3) includes an oxygen meter, a temperature and humidity meter, a pressure gauge, and an NO meter. x Sensors, SO2 sensors, CO sensors and CO2 sensors.

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