Energy-saving and emission-reducing sintering system and application thereof

Abstract

The invention provides an energy-saving and emission-reducing sintering system and application thereof, and relates to the technical field of sintering. According to the energy-saving and emission-reducing sintering system, the sintering machine is divided into six areas including the ignition section, the pre-sintering section, the first calcination section, the second calcination section, the machine tail section and the cooling section, and performance parameters of flue gas generated in each area are detected through the flue gas parameter detection device; the number of the air boxes is set according to the area of the sintering machine in each area and performance parameters such as the temperature, humidity and flow velocity of smoke, a multi-flue distributed air draft sintering process is adopted, and the air volume and air pressure in each flue can be independently and intelligently regulated and controlled through a control module according to the requirements of the sintering machine in different areas. The problems of high sintering power consumption, serious energy waste, low production efficiency and poor production regulation and control performance caused by the fact that a traditional sintering machine adjusts the production working conditions such as the air volume and the air pressure of each air bellow only through a single main fan and the air volume and the air pressure of the air bellow in each area are the same are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of sintering, and in particular to an energy-saving and emission-reducing sintering system and application thereof. Background Art

[0002] The sintering process in steel production is to first batch, mix and granulate various raw materials (concentrate, ore powder, fuel, flux, return ore and iron-containing production waste, etc.) in a certain proportion to obtain sintering raw materials that meet the requirements, and then use multiple bellows in a belt sintering machine to evacuate the air, and finally cool and crush to obtain sintered ore.

[0003] The existing sintering process for producing sintered ore mainly relies on fuel combustion to provide heat. The carbon in the fuel burns and transfers heat from top to bottom under the action of the fan exhaust, so that the sintered raw materials are bonded into ore. In order to speed up the heat exchange process between the air and the material layer, it is usually achieved by increasing the air permeability of the sintered raw materials and increasing the exhaust volume of the main exhaust fan. At present, the main problem of the sintering process is that more than 20 wind boxes are concentrated into the large flue, and the length of the large flue alone is more than 100 meters. The production conditions and parameters such as the air volume and air pressure of each wind box are adjusted only according to the centralized main fan exhaust. The air volume, air pressure, etc. of each wind box cannot be adjusted separately, resulting in high sintering power consumption, serious energy waste, low production efficiency and poor production controllability in the sintering process; and the composition of pollutants in the waste gas generated in different regions is quite different. The existing sintering process transports the waste gas generated in different regions to the same waste gas pipeline for unified treatment, resulting in low waste gas treatment efficiency and energy waste. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides an energy-saving and emission-reducing sintering system and its application. The energy-saving and emission-reducing sintering system has high energy utilization rate, high production efficiency, good production adjustability, high waste gas treatment efficiency and good energy-saving effect.

[0005] The present invention provides an energy-saving and emission-reducing sintering system, comprising a sintering machine, wherein the sintering machine is divided into a plurality of regions along the traveling direction of a trolley, and the plurality of regions are respectively an ignition section, a pre-burning section, a first calcination section, a second calcination section, a tail section and a cooling section along the traveling direction of the trolley, and each region is provided with a plurality of wind boxes, each of which is provided with a flue gas parameter detection device for detecting flue gas, and the outlet of each wind box is connected with a mixing air duct, and each of which is provided with a regulating valve; In each area, all the mixing air ducts are connected to a dust removal device; The outlet of each dust removal device is provided with an exhaust mechanism for treating flue gas, the exhaust mechanism includes a fan, the outlet of each exhaust mechanism is connected to an exhaust gas pipe, and each of the bellows, flue gas parameter detection device, regulating valve, dust removal device and exhaust mechanism is electrically connected to a control module.

[0006] The energy-saving and emission-reducing sintering system provided by the present invention divides the sintering machine into six areas, namely, an ignition section, a pre-burning section, a first calcining section, a second calcining section, a machine tail section and a cooling section. The performance parameters of the flue gas generated in each area are detected by a flue gas parameter detection device. The number of bellows is set according to the sintering machine area in each area and the performance parameters such as the temperature, humidity and flow rate of the bellows flue gas, and a multi-flue distributed exhaust sintering process is adopted. The air volume and air pressure in each flue can be independently and intelligently regulated by a control module according to the needs of different areas of the sintering machine, and regional intelligent regulation and production are carried out, thereby avoiding the problems of high sintering power consumption, serious energy waste, low production efficiency and poor production controllability caused by the traditional sintering machine only adjusting the air volume, air pressure and other production conditions of each bellows through a single main fan, and the air volume and air pressure of the bellows in each area being the same; dust removal devices and exhaust mechanisms can also be independently set according to the characteristics of the bellows flue gas in each area, and devices that can effectively remove pollutants can be set according to the types and quantities of pollutants in the bellows flue gas in different areas, which is more conducive to reducing pollutant emissions and low-carbon green production.

[0007] Preferably, the flue gas parameter detection device includes an oxygen meter, a temperature and humidity meter, a pressure gauge, a NOx sensor, a SO 2 Sensors, CO Sensors and CO 2 sensor.

[0008] Preferably, the dust removal device includes a dust collector, a pneumatic conveying device and an ash bin, the outlet of the regulating valve is connected to the inlet of the dust collector, the dust collector has two outlets, the first outlet of the dust collector is connected to the inlet of the exhaust mechanism, the second outlet of the dust collector is connected to the pneumatic conveying device, and the outlet of the pneumatic conveying device is connected to the ash bin. By adopting a dust removal device including a dust collector, a pneumatic conveying device and an ash bin, the dust in the flue gas can be removed and the dust collected in the dust collector can be sent to the ash bin for centralized recovery and treatment, thereby realizing unified discharge of dust and solving the problem of difficult dust recovery in decentralized dust removal.

[0009] Preferably, the exhaust mechanism also includes a desulfurization and denitrification device connected to the fan, and the desulfurization and denitrification device adopts any one of ozone oxidation desulfurization and denitrification method, activated carbon desulfurization and denitrification method, SCR desulfurization and denitrification method and zeolite catalytic combustion desulfurization and denitrification method, and the dust collector is one or a combination of two of a cyclone dust collector, a multi-tube dust collector, a cartridge dust collector, a bag dust collector and a plastic plate dust collector.

[0010] Preferably, the control module includes multiple independent control modules and a main control module, the main control module is electrically connected to all the independent control modules, and the number of the independent control modules is the same as the number of zones, and all the independent control modules are respectively arranged in all zones, and the bellows, flue gas parameter detection devices, regulating valves, dust removal devices, desulfurization and denitrification devices and fans in each zone are electrically connected to the independent control modules. By setting up independent control modules and the main control module, it is convenient to carry out decentralized control and centralized management of the bellows, flue gas parameter detection devices, regulating valves, dust removal devices, desulfurization and denitrification devices and fans in each zone.

[0011] Preferably, in the ignition section, pre-burning section and calcination section, the outlet of the dust removal device in each of the areas is connected to the inlet of the desulfurization and denitrification device, the outlet of the desulfurization and denitrification device in each area is connected to the inlet of the fan in the corresponding area, and the outlet of the fan in each area is connected to the exhaust gas pipe.

[0012] Preferably, in the second calcination stage, the tail stage and the cooling stage, the outlet of the dust removal device in each area is connected with the inlet of the fan in the corresponding area, the outlet of the fan in each area is connected with the inlet of the desulfurization and denitrification device in the corresponding area, and the outlet of the desulfurization and denitrification device in each area is connected with the exhaust gas pipe. By arranging the desulfurization and denitrification devices of the second calcination stage, the tail stage and the cooling stage after the fan, a positive pressure can be formed in the desulfurization and denitrification devices, which is beneficial to improving the desulfurization and denitrification efficiency of the second calcination stage, the tail stage and the cooling stage.

[0013] Preferably, a waste heat power generation device is also included, the inlet of the waste heat power generation device is connected with the outlet of the fan of the tail section and the cooling section, and the outlet of the waste heat power generation device is connected with the inlet of the desulfurization and denitrification device of the second calcination section, the tail section and the cooling section. By arranging the waste heat power generation device in the energy-saving and emission reduction system, the flue gas generated in the tail section and the cooling section is concentrated for waste heat utilization and then mixed with the flue gas generated in the second calcination section for centralized desulfurization and denitrification treatment, that is, the heat carried in the flue gas can be fully utilized, energy waste can be avoided, and the investment cost of the desulfurization and denitrification device can be reduced.

[0014] Preferably, a booster fan is further included, the booster fan includes two inlets, the first inlet of the booster fan is connected to the outlet of the fan of the second calcination stage, the second inlet of the booster fan is connected to the outlet of the waste heat power generation device, and the outlet of the booster fan is connected to the inlets of the desulfurization and denitrification devices of the second calcination stage, the tail stage and the cooling stage. By arranging a booster fan in the energy-saving and emission reduction system, the resistance of the flue gas in the desulfurization and denitrification devices can be reduced, which is beneficial to improving the efficiency of desulfurization and denitrification.

[0015] The present invention also provides application of the energy-saving and emission-reducing sintering system in steel smelting.

[0016] The positive and progressive effects of the present invention are: (1) The present invention improves the traditional large flue, high negative pressure, high air volume exhaust sintering process. In the production process, the required air volume and air pressure are not the same, and the traditional large flue technology is difficult to accurately adjust. The present invention adopts a distributed energy-saving and emission-reducing sintering system with multiple flues, low air volume, and low negative pressure. It can be adjusted and controlled in different areas such as the ignition section, pre-burning section, calcination section, tail section, and cooling section according to the sintering process. It can not only effectively improve the production quality, but also greatly reduce the production energy consumption, reduce the unit sintering ore pollutant emissions and the total emission of sintering flue gas, and provide a new energy-saving and emission-reducing sintering production process for metallurgical production; (2) The energy-saving and emission-reducing sintering system provided by the present invention uses an intelligent control method to intelligently control the bellows, regulating valves, dust removal devices, fans, and desulfurization and denitrification devices according to the performance parameters of the flue gas detected by the flue gas parameter detection device set on the outlet pipe of each wind box of the sintering machine or the mixed air duct, so as to accurately control the sintering air volume, material layer thickness, machine speed, and sintering end point, thereby achieving the goals of both "centralized management" and "decentralized control" on demand; (3) In the energy-saving and emission-reducing sintering system provided by the present invention, if one device fails, other adjacent devices can replace the failed device, and continuous production can still be carried out without stopping, thus achieving strong production stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the energy-saving and emission-reducing sintering system in Example 1; Figure 2 It is a structural schematic diagram of the energy-saving and emission-reducing sintering system in Example 2; Figure 3 It is a structural schematic diagram of the energy-saving and emission-reducing sintering system in Example 3; Figure 4 The temperature data diagram of the flue gas in six areas of the sintering machine; Figure 5 The flow velocity data diagram of the flue gas in six areas of the sintering machine; Figure 6 O in the flue gas of six areas of the sintering machine 2 and CO 2 Content data graph; Figure 7 NO in the flue gas of six areas of the sintering machine x and SO 2 Content data diagram of Figure 8 This is a data chart of CO content in the flue gas in the sintering machine area.

[0018] Description of Reference Numerals 1. Sintering machine; 2. Bellows; 3. Flue gas parameter detection device; 4. Mixing air duct; 5. Regulating valve; 6. Dust collector; 7. Desulfurization and denitrification device; 8. Fan; 9. Control module; 10. Booster fan; 11. Waste heat power generation device; 12. Pneumatic conveying device; 13. Ash bin; 14. Chimney. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below. It should be noted that the following implementation modes are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0020] Unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of this application can be understood according to specific circumstances.

[0021] In the embodiments of the present application, unless otherwise clearly specified and limited, when a first feature is “above” or “below” a second feature, it may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, when a first feature is “above”, “above”, or “above” a second feature, it may mean that the first feature is directly above or obliquely above the second feature, or it may simply mean that the first feature is higher in level than the second feature. When a first feature is “below”, “below”, or “below” a second feature, it may mean that the first feature is directly below or obliquely below the second feature, or it may simply mean that the first feature is lower in level than the second feature.

[0022] The following is combined with Figure 1-8 The present application is further described in detail with specific embodiments.

[0023] Example 1 This embodiment provides an energy-saving and emission-reducing sintering system. Figure 1As a structural diagram, the sintering machine 1 is divided into six areas along the moving direction of the trolley, which are the ignition section, pre-burning section, calcination section one, calcination section two, tail section and cooling section, and 23 bellows 2 are arranged under the trolley of the sintering machine 1. Bellows A to D are the ignition section, bellows E to H are the pre-burning section, bellows I to L are the calcination section one, bellows M to P are the calcination section two, bellows Q to T are the tail section, bellows U to W are the cooling section, and flue gas parameter detection devices 3 are arranged on the bellows A to W. The wind pressure and air volume of bellows A to W can be adjusted according to the performance data of the flue gas detected by the flue gas parameter detection device 3. The flue gas parameter detection device 3 includes an oxygen meter, a temperature and humidity meter, a pressure gauge, a NO x Sensors, SO 2 Sensors, CO Sensors and CO 2 Sensor, A-W bellows 2 are connected to the dust collectors 6 in the corresponding areas through the mixing air ducts 4 respectively. The bellows 2 in each area are connected by parallel longitudinal straight-into-mixing air ducts 4, which can reduce the system resistance. The mixing air ducts 4 are provided with regulating valves 5. The mixing air ducts 4 are connected to the corresponding dust collectors 6 in parallel longitudinal straight-into-mixing manner, which can reduce the system resistance. The dust collector 6 is one or a combination of two of a cyclone dust collector, a multi-tube dust collector, a cartridge dust collector, a bag dust collector and a plastic board dust collector. The outlet of the dust collector 6 corresponding to each area is connected to an exhaust mechanism to treat the flue gas. The exhaust mechanism includes a desulfurization and denitrification device 7 and a fan 8 connected to the desulfurization and denitrification device 7.

[0024] In the ignition section, the outlets of the A-D wind boxes 2 are respectively connected to the inlets of the four mixing air ducts 4, the outlets of the four mixing air ducts 4 are connected to the inlet of the A1 dust collector 6, the four mixing air ducts 4 are connected to the A1 dust collector 6 in parallel longitudinal straight-through manner, the A1 dust collector 6 has two outlets, the first outlet of the A1 dust collector 6 is connected to the inlet of the T1 desulfurization and denitrification device 7, the second outlet of the A1 dust collector 6 is connected to the inlet of the pneumatic conveying device 12, the T1 desulfurization and denitrification device The outlet of 7 is connected with the inlet of F1 fan 8, the outlet of pneumatic conveying device 12 is connected with ash bin 13, the outlet of fan 8 is connected with chimney 14, A1 dust collector 6, T1 desulfurization and denitrification device 7 and F1 fan 8 are connected in a longitudinal straight-through manner, A1 dust collector 6 is a plastic plate dust collector, the flue gas generated in the ignition section has high humidity and temperature below 100°C, the plastic plate dust collector is suitable for working conditions with high humidity and low temperature, T1 desulfurization and denitrification device 7 adopts ozone oxidation desulfurization and denitrification method.

[0025] In the pre-burning section, the outlets of the E-H wind boxes 2 are respectively connected to the inlets of the four mixing air ducts 4, the outlets of the four mixing air ducts 4 are connected to the inlet of the A2 dust collector 6, the four mixing air ducts 4 are connected to the A2 dust collector 6 in parallel longitudinal straight-through manner, the A2 dust collector 6 has two outlets, the first outlet of the A2 dust collector 6 is connected to the inlet of the T2 desulfurization and denitrification device 7, the second outlet of the A2 dust collector 6 is connected to the inlet of the pneumatic conveying device 12, the T2 desulfurization and denitrification device The outlet of 7 is connected with the inlet of F2 fan 8, the outlet of pneumatic conveying device 12 is connected with ash bin 13, the outlet of fan 8 is connected with chimney 14, A2 dust collector 6, T2 desulfurization and denitrification device 7 and F2 fan 8 are connected in a longitudinal straight-through manner, A2 dust collector 6 is a plastic plate dust collector, the flue gas generated in the pre-burning section has high humidity and temperature below 100°C, the plastic plate dust collector is suitable for working conditions with high humidity and low temperature, T2 desulfurization and denitrification device 7 adopts ozone oxidation desulfurization and denitrification method.

[0026] In the calcination stage, the outlets of the I-L wind boxes 2 are respectively connected to the inlets of the four mixing air ducts 4, and the outlets of the four mixing air ducts 4 are connected to the inlet of the A3 dust collector 6. The four mixing air ducts 4 are connected to the A3 dust collector 6 in parallel longitudinal straight-through manner. The A3 dust collector 6 has two outlets, the first outlet of the A3 dust collector 6 is connected to the inlet of the T3 desulfurization and denitrification device 7, and the second outlet of the A3 dust collector 6 is connected to the inlet of the pneumatic conveying device 12. The outlet of T3 desulfurization and denitrification device 7 is connected with the inlet of F3 fan 8, the outlet of pneumatic conveying device 12 is connected with ash bin 13, the outlet of fan 8 is connected with chimney 14, dust collector A3 6, desulfurization and denitrification device T3 7 and fan F3 8 are connected in a longitudinal straight-through manner. Dust collector A3 6 is a two-stage dust removal device, the first stage is a cyclone dust collector, and the second stage is a cartridge dust collector; desulfurization and denitrification device T3 7 adopts ozone oxidation desulfurization and denitrification method.

[0027] The flue gas produced in the ignition stage, pre-burning stage and calcination stage contains SO 2 Low content, NO X The characteristics of high content, low temperature and high humidity, so the ozone oxidation desulfurization and denitrification method is selected to more efficiently remove harmful gases SO in flue gas. 2 and NO x .

[0028] In the second stage of calcination, the outlets of the M-P wind boxes 2 are respectively connected to the inlets of the four mixing air ducts 4, and the outlets of the four mixing air ducts 4 are connected to the inlet of the A4 dust collector 6. The four mixing air ducts 4 are connected to the A4 dust collector 6 in parallel longitudinal straight-through manner. The A4 dust collector 6 has two outlets. The first outlet of the A4 dust collector 6 is connected to the inlet of the T4 desulfurization and denitrification device 7, and the second outlet of the A4 dust collector 6 is connected to the inlet of the pneumatic conveying device 12. The outlet of T4 desulfurization and denitrification device 7 is connected with the inlet of F4 fan 8, the outlet of pneumatic conveying device 12 is connected with ash bin 13, the outlet of fan 8 is connected with chimney 14, A4 dust collector 6, T4 desulfurization and denitrification device 7 and F4 fan 8 are connected in a longitudinal straight-through manner. A4 dust collector 6 is a two-stage dust removal device, the first stage is a multi-tube dust collector, and the second stage is a bag dust collector; T4 desulfurization and denitrification device 7 adopts zeolite catalytic combustion desulfurization and denitrification method.

[0029] In the tail section, the outlets of the Q-T wind boxes 2 are respectively connected to the inlets of the four mixing air ducts 4, and the outlets of the four mixing air ducts 4 are connected to the inlet of the A5 dust collector 6. The four mixing air ducts 4 are connected to the A5 dust collector 6 in parallel longitudinal straight-through manner. The A5 dust collector 6 has two outlets. The first outlet of the A5 dust collector 6 is connected to the inlet of the T5 desulfurization and denitrification device 7, and the second outlet of the A5 dust collector 6 is connected to the inlet of the pneumatic conveying device 12. The outlet of T5 desulfurization and denitrification device 7 is connected with the inlet of F5 fan 8, the outlet of pneumatic conveying device 12 is connected with ash bin 13, the outlet of fan 8 is connected with chimney 14, A5 dust collector 6, T5 desulfurization and denitrification device 7 and F5 fan 8 are connected in a longitudinal straight-forward manner; No. 5 dust collector 6 is a two-stage dust removal device, the first stage is a cyclone dust collector, and the second stage is a bag dust collector; T5 desulfurization and denitrification device 7 adopts zeolite catalytic combustion desulfurization and denitrification method.

[0030] In the cooling section, the outlets of the U-W wind boxes 2 are respectively connected to the inlets of the four mixing air ducts 4, and the outlets of the four mixing air ducts 4 are connected to the inlet of the A6 dust collector 6. The four mixing air ducts 4 are connected to the A6 dust collector 6 in parallel longitudinal straight-through manner. The A6 dust collector 6 has two outlets. The first outlet of the A6 dust collector 6 is connected to the inlet of the T6 desulfurization and denitrification device 7, and the second outlet of the A6 dust collector 6 is connected to the inlet of the pneumatic conveying device 12. The outlet of T6 desulfurization and denitrification device 7 is connected with the inlet of F6 fan 8, the outlet of pneumatic conveying device 12 is connected with ash bin 13, the outlet of fan 8 is connected with chimney 14, A6 dust collector 6, T6 desulfurization and denitrification device 7 and F6 fan 8 are connected in a longitudinal straight-forward manner; A6 dust collector 6 is a two-stage dust removal device, the first stage is a multi-tube dust collector, and the second stage is a cartridge dust collector; T6 desulfurization and denitrification device 7 adopts zeolite catalytic combustion desulfurization and denitrification method.

[0031] By adopting a dust removal device including a dust collector 6, a pneumatic conveying device 12 and an ash bin 13, the dust in the flue gas can be removed, and the dust collected in the dust collector 6 can be sent to the ash bin 13 for centralized recovery and treatment, thereby achieving unified discharge of dust and solving the problem of difficult dust recovery in decentralized dust removal.

[0032] The flue gas generated in the second calcination stage, the tail stage and the cooling stage contains SO 2 High content, NO x The characteristics of high temperature and low humidity make it more efficient to remove harmful gases SO in flue gas by choosing zeolite catalytic combustion desulfurization and denitrification method. 2 and NO x .

[0033] The temperature and humidity of the flue gas generated in the first calcination stage, the second calcination stage, the tail stage and the cooling stage are relatively high. A two-stage dust removal device is adopted, combining the advantages of different dust removal methods. The characteristics of cyclone or multi-tube dust collectors such as high temperature resistance, high humidity resistance, corrosion resistance and high negative pressure resistance can be fully utilized, and the advantages of cartridge dust collectors and bag dust collectors such as high dust removal efficiency and good removal effect on fine particles can be fully utilized.

[0034] The bellows 2, the flue gas parameter detection device 3, the regulating valve 5, the dust collector 6, the desulfurization and denitrification device 7, the fan 8 and the pneumatic conveying device 12 are electrically connected to the control module 9 to realize intelligent control.

[0035] The performance parameters of the flue gas generated in each area are detected by the flue gas parameter detection device 3, and the number of bellows 2 is set according to the area of ​​the sintering machine 1 in each area and the performance parameters such as the temperature, humidity and flow rate of the flue gas in the bellows 2. A multi-flue distributed exhaust sintering process is adopted, and the air volume and air pressure in each flue can be independently and intelligently regulated through the control module 9 according to the needs of different areas of the sintering machine 1, so as to carry out regional intelligent regulation and production, thereby avoiding the traditional sintering machine adjusting the air volume, air pressure and other production conditions of each bellows 2 by only a single main fan. According to the flue gas characteristics of the bellows 2 in each area, a dust removal device and an exhaust mechanism can be independently set, and a device that can effectively remove pollutants can be set according to the types and quantities of pollutants in the flue gas of the bellows 2 in different areas, which is more conducive to reducing pollutant emissions and low-carbon green production.

[0036] The main performance parameters and treatment methods of the flue gas generated in six areas of the sintering machine 1 along the traveling direction of the trolley are shown in Table 1.

[0037] Table 1 Main performance parameters and treatment methods of flue gas generated in six areas Figure 4This is the temperature data diagram of the flue gas in the six areas of the sintering machine. It can be seen from the figure that the temperature of the flue gas generated in the ignition section, pre-burning section and calcination section is relatively low, below 100°C; while the temperature of the flue gas generated in the second calcination section, the tail section and the cooling section is relatively high, the temperature of the flue gas generated in the second calcination section and the tail section is between 100-200°C, and the temperature of the flue gas generated in the cooling section is between 200-350°C.

[0038] Figure 5 The flow rate data diagram of the flue gas in the six areas of the sintering machine shows that the flow rate of the flue gas generated in the ignition section, pre-burning section, calcination section one and calcination section two is relatively low, below 15m / s; while the flow rate of the flue gas generated in the tail section and cooling section is relatively high, reaching more than 35m / s.

[0039] Figure 6 O in the flue gas of six areas of the sintering machine 2 and CO 2 The content data chart shows that compared with the flue gas produced in the pre-burning section and the first calcination section, the flue gas produced in the ignition section, the second calcination section, the tail section and the cooling section contains more O 2 The content of CO is relatively high, while 2 The content is relatively low.

[0040] Figure 7 NO in the flue gas of six areas of the sintering machine x and SO 2 The content data of SO in the flue gas generated by the calcination stage, the second calcination stage, the tail stage and the cooling stage are higher than those in the ignition stage and the pre-burning stage. 2 The content of NO x The content is lower.

[0041] Figure 8 This is a data graph of the CO content in the flue gas in the sintering machine area. It can be seen from the figure that along the moving direction of the trolley, the CO content in the flue gas generated by the ignition section, pre-burning section, calcination section one, calcination section two, tail section and cooling section generally shows a trend of being low at both ends and high in the middle.

[0042] Example 2 This embodiment provides an energy-saving and emission-reducing sintering system. Figure 2As a structural diagram, the sintering machine 1 is divided into six areas along the moving direction of the trolley, which are the ignition section, pre-burning section, calcination section one, calcination section two, tail section and cooling section, and 23 bellows 2 are arranged under the trolley of the sintering machine 1. Bellows A to D are the ignition section, bellows E to H are the pre-burning section, bellows I to L are the calcination section one, bellows M to P are the calcination section two, bellows Q to T are the tail section, bellows U to W are the cooling section, and flue gas parameter detection devices 3 are arranged on the bellows A to W. The wind pressure and air volume of bellows A to W can be adjusted according to the performance data of the flue gas detected by the flue gas parameter detection device 3. The flue gas parameter detection device 3 includes an oxygen meter, a temperature and humidity meter, a pressure gauge, a NO x Sensors, SO 2 Sensors, CO Sensors and CO 2 Sensor, A-W bellows 2 are connected to the dust collector 6 of the corresponding area through the mixing air duct 4 respectively, and a regulating valve 5 is arranged on the mixing air duct 4. The mixing air duct 4 is arranged in a parallel longitudinal straight-forward type, which can reduce the system resistance. The dust collector 6 is one or a combination of two of a cyclone dust collector, a multi-tube dust collector, a cartridge dust collector, a bag dust collector and a plastic plate dust collector. The outlet of the dust collector 6 corresponding to each area is connected to an exhaust mechanism to process the flue gas. The exhaust mechanism includes a desulfurization and denitrification device 7 and a fan 8 connected to the desulfurization and denitrification device 7.

[0043] In the ignition section, the outlets of wind boxes 2 No. A to No. D are connected to the inlets of four mixing air ducts 4 respectively, and the outlets of the four mixing air ducts 4 are connected to the inlet of dust collector No. A1 6. The four mixing air ducts 4 are connected to dust collector No. A1 6 in parallel longitudinal straight-in type. Dust collector No. A1 6 has two outlets. The first outlet of dust collector No. A1 6 is connected to the inlet of desulfurization and denitrification device No. T1 7, and the second outlet of dust collector No. A1 6 is connected to the inlet of pneumatic conveying device 12. The outlet of desulfurization and denitrification device No. T1 7 is connected to the inlet of fan No. F1 8. The outlet of pneumatic conveying device 12 is connected to ash bin 13, and the outlet of fan 8 is connected to chimney 14. Dust collector No. A1 6, desulfurization and denitrification device No. T1 7 and fan No. F1 8 are connected in longitudinal straight-in type. Dust collector No. A1 6 is a plastic plate dust collector, and desulfurization and denitrification device No. T1 7 adopts ozone oxidation desulfurization and denitrification method.

[0044] In the pre-burning section, the outlets of the E-H wind boxes 2 are connected to the inlets of the four mixing air ducts 4 respectively, the outlets of the four mixing air ducts 4 are connected to the inlet of the A2 dust collector 6, the four mixing air ducts 4 are connected to the A2 dust collector 6 in parallel longitudinal straight-in type, the A2 dust collector 6 has two outlets, the first outlet of the A2 dust collector 6 is connected to the inlet of the T2 desulfurization and denitrification device 7, the second outlet of the A2 dust collector 6 is connected to the inlet of the pneumatic conveying device 12, the outlet of the T2 desulfurization and denitrification device 7 is connected to the inlet of the F2 fan 8, the outlet of the pneumatic conveying device 12 is connected to the ash bin 13, the outlet of the fan 8 is connected to the chimney 14, the A2 dust collector 6, the T2 desulfurization and denitrification device 7 and the F2 fan 8 are connected in longitudinal straight-in type, the A2 dust collector 6 is a plastic plate dust collector, and the T2 desulfurization and denitrification device 7 adopts ozone oxidation desulfurization and denitrification method.

[0045] In the calcination stage, the outlets of the No. I to No. L wind boxes 2 are respectively connected to the inlets of four mixing air ducts 4, and the outlets of the four mixing air ducts 4 are connected to the inlet of the No. A3 dust collector 6. The four mixing air ducts 4 are connected to the No. A3 dust collector 6 in parallel longitudinal straight-through manner. The No. A3 dust collector 6 has two outlets. The first outlet of the No. A3 dust collector 6 is connected to the inlet of the No. T3 desulfurization and denitrification device 7, and the second outlet of the No. A3 dust collector 6 is connected to the inlet of the pneumatic conveying device 12. The outlet of T3 desulfurization and denitrification device 7 is connected with the inlet of F3 fan 8, the outlet of pneumatic conveying device 12 is connected with ash bin 13, the outlet of fan 8 is connected with chimney 14, A3 dust collector 6, T3 desulfurization and denitrification device 7 and F3 fan 8 are connected in a vertical straight-through manner; A3 dust collector 6 is a two-stage dust removal device, the first stage is a cyclone dust collector, and the second stage is a cartridge dust collector; T3 desulfurization and denitrification device 7 adopts ozone oxidation desulfurization and denitrification method.

[0046] In the second stage of calcination, the outlets of the M-P wind boxes 2 are respectively connected to the inlets of the four mixing air ducts 4, the outlets of the four mixing air ducts 4 are connected to the inlet of the A4 dust collector 6, the four mixing air ducts 4 are connected to the A4 dust collector 6 in parallel longitudinal straight-through type, the A4 dust collector 6 has two outlets, the first outlet of the A4 dust collector 6 is connected to the inlet of the F4 fan 8, the A4 dust collector 6 is connected to the F4 fan 8 in longitudinal straight-through type, the second outlet of the A4 dust collector 6 is connected to the inlet of the pneumatic conveying device 12, and the outlet of the F4 fan 8 is connected to the The first inlet of the F7 booster fan 10 is connected, the outlet of the F7 booster fan 10 is connected to the total inlet of the T4-T6 desulfurization and denitrification device 7, the total outlet of the T4-T6 desulfurization and denitrification device 7 is connected to the chimney 14, and the outlet of the pneumatic conveying device 12 is connected to the ash bin 13; the A4 dust collector 6 is a two-stage dust removal device, the first stage is a multi-tube dust collector, and the second stage is a bag dust collector; the T4, T5 and T6 desulfurization and denitrification devices 7 adopt the zeolite catalytic combustion desulfurization and denitrification method, and the flue gas generated by the calcination second stage, the tail stage and the cooling stage has SO 2 High content, NO x The characteristics of high temperature and low humidity make it more efficient to remove harmful gases SO in flue gas by choosing zeolite catalytic combustion desulfurization and denitrification method. 2 and NO x .

[0047] In the tail section, the outlets of Q-T wind boxes 2 are respectively connected with the inlets of four mixing air ducts 4, the total outlet of the four mixing air ducts 4 is connected with the inlet of A5 dust collector 6, the four mixing air ducts 4 are connected with A5 dust collector 6 in parallel longitudinal straight-through manner, A5 dust collector 6 has two outlets, the first outlet of A5 dust collector 6 is connected with the inlet of F5 fan 8, the second outlet of A5 dust collector 6 is connected with the inlet of pneumatic conveying device 12, the outlet of F5 fan 8 is connected with the first inlet of FD waste heat power generation device 11, the outlet of FD waste heat power generation device 11 is connected with F7 The second inlet of the booster fan 10 is connected, and the outlet of the F7 booster fan 10 is connected to the inlet of the T4, T5 and T6 desulfurization and denitrification devices 7. The A5 dust collector 6 is a two-stage dust removal device. The first stage is a cyclone dust collector, and the second stage is a bag dust collector. By arranging a waste heat power generation device 11 in the energy-saving and emission reduction system, the flue gas generated in the tail section and the cooling section is concentrated for waste heat utilization, and then mixed with the flue gas generated in the second calcination section for centralized desulfurization and denitrification treatment, which can make full use of the heat carried in the flue gas, avoid energy waste, and reduce the investment cost of the desulfurization and denitrification device 7.

[0048] In the cooling section, the outlets of the U-W wind boxes 2 are connected to the inlets of the four mixing air ducts 4 respectively, the outlets of the four mixing air ducts 4 are connected to the inlet of the A6 dust collector 6, the four mixing air ducts 4 are connected to the A6 dust collector 6 in parallel longitudinal straight-through type, the A6 dust collector 6 has two outlets, the first outlet of the A6 dust collector 6 is connected to the inlet of the F6 fan 8, the outlet of the F6 fan 8 is connected to the second inlet of the FD waste heat power generation device 11, the outlet of the FD waste heat power generation device 11 is connected to the inlet of the F7 booster fan 10, the A6 dust collector 6 is a two-stage dust removal device, the first stage is a multi-tube dust collector, and the second stage is a cartridge dust collector. By arranging the booster fan 10 in the energy-saving and emission reduction system, the resistance of the flue gas in the desulfurization and denitrification device 7 can be reduced, which is beneficial to improving the efficiency of desulfurization and denitrification.

[0049] By adopting a dust removal device including a dust collector 6, a pneumatic conveying device 12 and an ash bin 13, the dust in the flue gas can be removed, and the dust collected in the dust collector 6 can be sent to the ash bin 13 for centralized recovery and treatment, thereby achieving unified discharge of dust and solving the problem of difficult dust recovery in decentralized dust removal.

[0050] By arranging the desulfurization and denitrification devices 7 of the second calcination stage, the tail stage and the cooling stage after the fan 8, a positive pressure can be formed in the desulfurization and denitrification devices 7, which is beneficial to improving the desulfurization and denitrification efficiency of the second calcination stage, the tail stage and the cooling stage. The bellows 2, the flue gas parameter detection device 3, the regulating valve 5, the dust collector 6, the desulfurization and denitrification devices 7, the fan 8, the booster fan 10, the waste heat power generation device 11, the pneumatic conveying device 12 and the ash bin 13 are electrically connected to the control module 9 to realize intelligent control.

[0051] The performance parameters of the flue gas generated in each area are detected by the flue gas parameter detection device 3, and the number of bellows 2 is set according to the area of ​​the sintering machine 1 in each area and the performance parameters such as the temperature, humidity and flow rate of the flue gas in the bellows 2. A multi-flue distributed exhaust sintering process is adopted, and the air volume and air pressure in each flue can be independently and intelligently regulated through the control module 9 according to the needs of different areas of the sintering machine 1, so as to carry out regional intelligent regulation and production, thereby avoiding the traditional sintering machine adjusting the air volume, air pressure and other production conditions of each bellows 2 by only a single main fan. According to the flue gas characteristics of the bellows 2 in each area, a dust removal device and an exhaust mechanism can be independently set, and a device that can effectively remove pollutants can be set according to the types and quantities of pollutants in the flue gas of the bellows 2 in different areas, which is more conducive to reducing pollutant emissions and low-carbon green production.

[0052] Example 3 This embodiment provides an energy-saving and emission-reducing sintering system. Figure 3As a structural diagram, the sintering machine 1 is divided into six areas along the moving direction of the trolley, which are the ignition section, pre-burning section, calcination section one, calcination section two, tail section and cooling section, and 23 bellows 2 are arranged under the trolley of the sintering machine 1. Bellows A to D are the ignition section, bellows E to H are the pre-burning section, bellows I to L are the calcination section one, bellows M to P are the calcination section two, bellows Q to T are the tail section, bellows U to W are the cooling section, and flue gas parameter detection devices 3 are arranged on the bellows A to W. The wind pressure and air volume of bellows A to W can be adjusted according to the performance data of the flue gas detected by the flue gas parameter detection device 3. The flue gas parameter detection device 3 includes an oxygen meter, a temperature and humidity meter, a pressure gauge, a NO x Sensors, SO 2 Sensors, CO Sensors and CO 2 Sensor, A-W bellows 2 are connected with the dust collector 6 in the corresponding area through the mixing air duct 4 respectively, the mixing air duct 4 is provided with a regulating valve 5, the mixing air duct 4 is arranged in parallel and horizontally, the mixing air duct 4 and the dust collector 6 are connected in parallel and horizontally, which can save the occupied space of the system, the dust collector 6 is one or a combination of two of a cyclone dust collector, a multi-tube dust collector, a cartridge dust collector, a bag dust collector and a plastic board dust collector, and the outlet of the dust collector 6 corresponding to each area is connected with an exhaust mechanism to treat the flue gas.

[0053] In the ignition section, the exhaust mechanism includes a fan 8, the outlets of the A-D bellows 2 are respectively connected to the inlets of the four mixing air ducts 4, the outlets of the four mixing air ducts 4 are connected to the inlet of the A1 dust collector 6, the four mixing air ducts 4 are connected to the A1 dust collector 6 in parallel and transversely, the first outlet of the A1 dust collector 6 is connected to the fan 8, the second outlet of the A1 dust collector 6 is connected to the inlet of the pneumatic conveying device 12, the outlet of the pneumatic conveying device 12 is connected to the ash bin 13, the outlet of the fan 8 is connected to the chimney 14, the A1 dust collector 6 and the F1 fan 8 are connected in parallel and transversely, and the A1 dust collector 6 is a plastic plate dust collector.

[0054] In the pre-burning section, the exhaust mechanism includes a desulfurization and denitrification device 7 and a fan 8 connected to the desulfurization and denitrification device 7, the outlets of the E-H wind boxes 2 are respectively connected to the inlets of four mixing air ducts 4, the outlets of the four mixing air ducts 4 are connected to the inlet of the A2 dust collector 6, the four mixing air ducts 4 are connected to the A2 dust collector 6 in parallel and transversely connected, the first outlet of the A2 dust collector 6 is connected to the inlet of the T2 desulfurization and denitrification device 7, the second outlet of the A2 dust collector 6 is connected to the inlet of the pneumatic conveying device 12, the outlet of the T2 desulfurization and denitrification device 7 is connected to the inlet of the F2 fan 8, the outlet of the pneumatic conveying device 12 is connected to the ash bin 13, the outlet of the fan 8 is connected to the chimney 14, the A2 dust collector 6, the T2 desulfurization and denitrification device 7 and the F2 fan 8 are connected in parallel and transversely connected, the A2 dust collector 6 is a plastic plate dust collector, and the T2 desulfurization and denitrification device 7 adopts ozone oxidation desulfurization and denitrification method.

[0055] In the calcination stage, the exhaust mechanism includes a desulfurization and denitration device 7 and a fan 8 connected to the desulfurization and denitration device 7. The outlets of the I-L wind boxes 2 are respectively connected to the inlets of four mixing air ducts 4, and the outlets of the four mixing air ducts 4 are connected to the inlet of the A3 dust collector 6. The four mixing air ducts 4 are connected to the A3 dust collector 6 in parallel and horizontally. The first outlet of the A3 dust collector 6 is connected to the inlet of the T3 desulfurization and denitration device 7, and the second outlet of the A3 dust collector 6 is connected to the pneumatic conveying device 1. The inlet of device 12 is connected, the outlet of T3 desulfurization and denitrification device 7 is connected with the inlet of F3 fan 8, the outlet of pneumatic conveying device 12 is connected with ash bin 13, the outlet of fan 8 is connected with chimney 14, dust collector A3 6, T3 desulfurization and denitrification device 7 and F3 fan 8 are connected in parallel and horizontally; A3 dust collector 6 is a two-stage dust removal device, the first stage is a cyclone dust collector, and the second stage is a cartridge dust collector; T3 desulfurization and denitrification device 7 adopts ozone oxidation desulfurization and denitrification method.

[0056] In the second stage of calcination, the exhaust mechanism includes a desulfurization and denitration device 7 and a fan 8 connected to the desulfurization and denitration device 7, the outlets of the M-P wind boxes 2 are respectively connected to the inlets of four mixing air ducts 4, the outlets of the four mixing air ducts 4 are connected to the inlet of the A4 dust collector 6, the four mixing air ducts 4 are connected to the A4 dust collector 6 in parallel and transversely connected, the first outlet of the A4 dust collector 6 is connected to the inlet of the F4 fan 8, the A4 dust collector 6 and the F4 fan 8 are connected in parallel and transversely connected, the second outlet of the A4 dust collector 6 is connected to the inlet of the pneumatic conveying device 12, and the F4 fan 8 The outlet of the F7 booster fan 10 is connected to the first inlet of the F7 booster fan 10, the outlet of the F7 booster fan 10 is connected to the total inlet of the T4-T6 desulfurization and denitrification devices 7, the total outlets of the T4, T5 and T6 desulfurization and denitrification devices 7 are connected to the chimney 14, and the outlet of the pneumatic conveying device 12 is connected to the ash bin 13; the A4 dust collector 6 is a two-stage dust removal device, the first stage is a multi-tube dust collector, and the second stage is a bag dust collector; the T4, T5 and T6 desulfurization and denitrification devices 7 adopt the activated carbon ammoniation desulfurization and denitrification method, and the flue gas generated in the second calcination stage, the tail stage and the cooling stage has SO 2 High content, NO x Due to the high temperature and low humidity, the activated carbon ammoniation desulfurization and denitrification method can more efficiently remove harmful gases SO in flue gas. 2 and NO x .

[0057] In the tail section, the exhaust mechanism includes a desulfurization and denitrification device 7 and a fan 8 connected to the desulfurization and denitrification device 7. The outlets of the Q-T wind boxes 2 are respectively connected to the inlets of four mixing air ducts 4. The total outlet of the four mixing air ducts 4 is connected to the inlet of the A5 dust collector 6. The four mixing air ducts 4 are connected to the A5 dust collector 6 in parallel and horizontally. The first outlet of the A5 dust collector 6 is connected to the inlet of the F5 fan 8. The second outlet of the A5 dust collector 6 is connected to the inlet of the pneumatic conveying device 12. The outlet of the F5 fan 8 is connected to the first inlet of the FD waste heat power generation device 11. The outlet is connected with the second inlet of F7 booster fan 10, and the outlet of F7 booster fan 10 is connected with the inlet of T4, T5 and T6 desulfurization and denitrification devices 7. A5 dust collector 6 is a two-stage dust removal device, the first stage is a cyclone dust collector, and the second stage is a bag dust collector. By arranging a waste heat power generation device 11 in the energy-saving and emission reduction system, the flue gas generated in the tail section and the cooling section is concentrated for waste heat utilization, and then mixed with the flue gas generated in the second calcination section for centralized desulfurization and denitrification treatment, that is, the heat carried in the flue gas can be fully utilized, energy waste can be avoided, and the investment cost of the desulfurization and denitrification device 7 can be reduced.

[0058] In the cooling section, the exhaust mechanism includes a desulfurization and denitrification device 7 and a fan 8 connected to the desulfurization and denitrification device 7. The outlets of the U-W bellows 2 are respectively connected to the inlets of four mixing air ducts 4, the outlets of the four mixing air ducts 4 are connected to the inlet of the A6 dust collector 6, the four mixing air ducts 4 are connected to the A6 dust collector 6 in parallel and horizontally, the first outlet of the A6 dust collector 6 is connected to the inlet of the F6 fan 8, the outlet of the F6 fan 8 is connected to the second inlet of the FD waste heat power generation device 11, the outlet of the FD waste heat power generation device 11 is connected to the inlet of the F7 booster fan 10, the A6 dust collector 6 is a two-stage dust removal device, the first stage is a multi-tube dust collector, and the second stage is a cartridge dust collector. By arranging the booster fan 10 in the energy-saving and emission reduction system, the resistance of the flue gas in the desulfurization and denitrification device 7 can be reduced, which is beneficial to improving the efficiency of desulfurization and denitrification.

[0059] By adopting a dust removal device including a dust collector 6, a pneumatic conveying device 12 and an ash bin 13, the dust in the flue gas can be removed, and the dust collected in the dust collector 6 can be sent to the ash bin 13 for centralized recovery and treatment, thereby achieving unified discharge of dust and solving the problem of difficult dust recovery in decentralized dust removal.

[0060] By arranging the desulfurization and denitrification devices 7 of the second calcination stage, the tail stage and the cooling stage after the fan 8, a positive pressure can be formed in the desulfurization and denitrification devices 7, which is beneficial to improving the desulfurization and denitrification efficiency of the second calcination stage, the tail stage and the cooling stage. The bellows 2, the flue gas parameter detection device 3, the regulating valve 5, the dust collector 6, the desulfurization and denitrification devices 7, the fan 8, the booster fan 10, the waste heat power generation device 11, the pneumatic conveying device 12 and the ash bin 13 are electrically connected to the control module 9 to realize intelligent control.

[0061] The performance parameters of the flue gas generated in each area are detected by the flue gas parameter detection device 3, and the number of bellows 2 is set according to the area of ​​the sintering machine 1 in each area and the performance parameters such as the temperature, humidity and flow rate of the flue gas in the bellows 2. A multi-flue distributed exhaust sintering process is adopted, and the air volume and air pressure in each flue can be independently and intelligently regulated through the control module 9 according to the needs of different areas of the sintering machine 1, so as to carry out regional intelligent regulation and production, thereby avoiding the traditional sintering machine adjusting the air volume, air pressure and other production conditions of each bellows 2 by only a single main fan. According to the flue gas characteristics of the bellows 2 in each area, a dust removal device and an exhaust mechanism can be independently set, and a device that can effectively remove pollutants can be set according to the types and quantities of pollutants in the flue gas of the bellows 2 in different areas, which is more conducive to reducing pollutant emissions and low-carbon green production.

[0062] Example 4 The present embodiment provides an energy-saving and emission-reducing sintering system, which is different from Embodiment 1 in that the control module 9 includes an independent control module and a general control module, and independent control modules are respectively arranged in six areas, namely, the ignition section, the pre-burning section, the first calcination section, the second calcination section, the tail section and the cooling section. In each area, the wind box 2, the flue gas parameter detection device 3, the regulating valve 5, the dust collector 6, the desulfurization and denitrification device 7 and the fan 8 are respectively electrically connected to the independent control modules of the corresponding areas, and the independent control module of each area is electrically connected to the general control module, which is convenient for centralized management and decentralized control.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit it. In particular, the division of the various areas of the sintering machine can be set according to the area of ​​the sintering machine, and the number of wind boxes can also be adjusted according to requirements. Moreover, the dust removal, desulfurization and denitrification devices in each area can also be selectively changed based on the mature technology in the industry according to the characteristics of the flue gas. Although the present invention has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that it is still possible to modify the technical solutions recorded in the aforementioned embodiments, or to replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.

Claims

1. An energy-saving and emission-reducing sintering system, comprising a sintering machine (1), characterized in that: The sintering machine (1) is divided into a plurality of areas along the direction of travel of the trolley, and the plurality of areas are respectively an ignition section, a pre-burning section, a first calcination section, a second calcination section, a tail section and a cooling section along the direction of travel of the trolley, and each area is provided with a plurality of wind boxes (2), and each wind box (2) is provided with a flue gas parameter detection device (3) for detecting flue gas, and the outlet of each wind box (2) is connected to a mixing air duct (4), and each mixing air duct (4) is installed with a regulating valve (5); In each area, all the mixing air ducts (4) are connected to a dust removal device; The outlet of each dust removal device is provided with an exhaust mechanism for processing flue gas, the exhaust mechanism comprising a fan (8), the outlet of each exhaust mechanism being connected to an exhaust gas pipeline, and each of the bellows (2), the flue gas parameter detection device (3), the regulating valve (5), the dust removal device and the exhaust mechanism being electrically connected to a control module (9).

2. The energy-saving and emission-reducing sintering system according to claim 1 is characterized in that: The flue gas parameter detection device (3) comprises an oxygen meter, a temperature and humidity meter, a pressure gauge, a NO x Sensor, SO2 sensor, CO sensor and CO2 sensor.

3. The energy-saving and emission-reducing sintering system according to claim 1 is characterized in that: The dust removal device comprises a dust collector (6), a pneumatic conveying device (12) and an ash bin (13); the outlet of the regulating valve (5) is connected to the inlet of the dust collector (6); the dust collector (6) has two outlets; the first outlet of the dust collector (6) is connected to the inlet of the exhaust mechanism; the second outlet of the dust collector (6) is connected to the pneumatic conveying device (12); and the outlet of the pneumatic conveying device (12) is connected to the ash bin (13).

4. The energy-saving and emission-reducing sintering system according to claim 3 is characterized in that: The exhaust mechanism further comprises a desulfurization and denitrification device (7) connected to the fan (8); the desulfurization and denitrification device (7) adopts any one of an ozone oxidation desulfurization and denitrification method, an activated carbon desulfurization and denitrification method, an SCR desulfurization and denitrification method, and a zeolite catalytic combustion desulfurization and denitrification method; and the dust collector (6) is one of a cyclone dust collector, a multi-tube dust collector, a cartridge dust collector, a bag dust collector, and a plastic plate dust collector, or a combination of two of the above.

5. The energy-saving and emission-reducing sintering system according to claim 4 is characterized in that: The control module (9) comprises a plurality of independent control modules and a master control module, the master control module being electrically connected to all the independent control modules, the number of the independent control modules being the same as the number of the zones, and all the independent control modules being arranged one by one in all the zones, and the wind box (2), the flue gas parameter detection device (3), the regulating valve (5), the dust removal device, the desulfurization and denitrification device (7) and the fan (8) in each zone being electrically connected to the independent control module.

6. The energy-saving and emission-reducing sintering system according to claim 4 is characterized in that: In the ignition section, pre-burning section and calcination section, the outlet of the dust removal device in each of the areas is connected to the inlet of the desulfurization and denitrification device (7), the outlet of the desulfurization and denitrification device (7) in each area is connected to the inlet of the fan (8) in the corresponding area, and the outlet of the fan (8) in each area is connected to the exhaust gas pipeline.

7. The energy-saving and emission-reducing sintering system according to claim 4 is characterized in that: In the second calcination stage, the tail stage and the cooling stage, the outlet of the dust removal device in each area is connected to the inlet of the fan (8) in the corresponding area, the outlet of the fan (8) in each area is connected to the inlet of the desulfurization and denitrification device (7) in the corresponding area, and the outlet of the desulfurization and denitrification device (7) in each area is connected to the exhaust gas pipeline.

8. The energy-saving and emission-reducing sintering system according to claim 7 is characterized in that: It also comprises a waste heat power generation device (11), the inlet of the waste heat power generation device (11) being connected to the outlet of the fan (8) of the tail section and the cooling section, and the outlet of the waste heat power generation device (11) being connected to the inlet of the desulfurization and denitration device (7) of the second calcination section, the tail section and the cooling section.

9. The energy-saving and emission-reducing sintering system according to claim 8, characterized in that: The invention also comprises a booster fan (10), wherein the booster fan (10) comprises two inlets, wherein the first inlet of the booster fan (10) is connected to the outlet of the fan (8) of the second calcination stage, the second inlet of the booster fan (10) is connected to the outlet of the waste heat power generation device (11), and the outlet of the booster fan (10) is connected to the inlets of the desulfurization and denitration devices (7) of the second calcination stage, the tail stage and the cooling stage.

10. Application of the energy-saving and emission-reducing sintering system according to any one of claims 1 to 9 in steel smelting.

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