Sintering flue gas CO oxidation catalysis device

Abstract

The utility model discloses a sintering flue gas CO oxidation catalysis device which comprises a gas inlet box, catalysis units and a gas outlet box, the gas inlet box comprises at least one gas inlet and a plurality of first connecting ports, the plurality of first connecting ports are communicated with the gas inlet, each first connecting port is connected with one catalysis unit, each catalysis unit comprises two adjusting devices, an air inlet device and a catalysis device, the first adjusting device, the air inlet device, the catalytic device and the second adjusting device are arranged in a stacked mode from bottom to top, the two adjusting devices adjust the amount of flue gas entering and exiting the catalytic unit, the air inlet device comprises a first air inlet connected with a hot blast stove, and a catalyst is arranged in the catalytic device. The gas outlet box comprises at least one gas outlet and a plurality of second connecting ports, each second connecting port is connected with an adjusting device located at the upper end, the plurality of second connecting ports are connected with the gas outlet, and the online CO oxidation catalysis can be carried out in the flue gas sintering process by controlling the independent catalysis units.

Description

TECHNICAL FIELD

[0001] The utility model relates to sintering flue gas environmental protection management technical field more specifically, relate to a kind of sintering flue gas CO oxidation catalytic device. BACKGROUND

[0002] In recent years, with the continuous deepening of air pollution prevention and control work in various places, conventional air pollutants are effectively controlled, and environmental air quality is continuously improved. At the same time, some unconventional pollutants have gradually attracted attention, and carbon monoxide (CO) is one of them. The steel industry is one of the main sources of carbon monoxide emissions. Developing carbon monoxide control in the steel industry and effectively controlling carbon monoxide emissions are very important for continuously improving air quality. In the prior art, carbon monoxide needs to be transported separately for oxidation catalysis, which is a complex process with a long flow. The oxidation catalyst is consumed quickly during long-term operation and needs to be replaced frequently. Therefore, a technical solution is needed to solve the above problems. SUMMARY

[0003] The utility model aims at overcoming the deficiency of prior art, can be carried out in the flue gas treatment system on-line oxidation catalysis of flue gas, provide a kind of sintering flue gas CO oxidation catalytic device.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] The utility model discloses a kind of sintering flue gas CO oxidation catalytic device, including intake tank, catalytic unit, outlet tank, the intake tank includes at least one gas inlet and multiple first connecting port, multiple the first connecting port is communicated the gas inlet, each the first connecting port connects one catalytic unit, the catalytic unit includes two adjusting device, air inlet device, catalytic device, first adjusting device, air inlet device, catalytic device, second adjusting device are stacked from below to top, two adjusting devices adjust the flue gas amount of import and export catalytic unit, the air inlet device includes first air inlet, the first air inlet is connected hot blast furnace, the catalytic device is equipped with catalyst, the outlet tank includes at least one gas outlet and multiple second connecting port, each second connecting port connects one adjusting device at upper end, multiple second connecting port connects the gas outlet.

[0006] Further, the adjusting device includes a first housing and a plurality of vanes, the plurality of vanes are arranged at intervals, the vanes can rotate, the adjusting device has the maximum ventilation when the vanes are in a vertical state, and the adjusting device is closed when the vanes are in a horizontal state.

[0007] Further, the adjusting device comprises a motor, rotating shafts, gears and a toothed belt, the motor is installed on the first shell, the rotating shafts are provided in plurality, one of the rotating shafts is connected with the motor, the rotating shafts pass through the first shell, the fan blades are installed on the rotating shafts, one end of the rotating shafts extends out of the first shell, gears are installed on the end of the rotating shafts extending out of the first shell, and all the gears are connected with each other through the toothed belt.

[0008] Further, the fan blades comprise two blades, the blades are provided with notches, the notches of two adjacent fan blades abut against each other when the fan blades are in horizontal state, the inner wall of the first shell is provided with two baffles, the two baffles are located on two opposite side walls of the first shell, and the blades of two fan blades at two ends abut against the baffles when the fan blades are in horizontal state.

[0009] Further, the catalyst is provided with a plurality of air holes, the air holes are connected with upper and lower end faces of the catalyst, and the air holes are connected with the air inlet device and the adjusting device located above.

[0010] Further, the catalytic unit comprises a flue gas mixing device, the flue gas mixing device is installed in the air inlet device, and the flue gas mixing device is located above the first air inlet.

[0011] Further, the air outlet device comprises a third shell, a flue gas mixing device is installed in the air outlet device, the third shell is provided with an air outlet, and the flue gas mixing device is located on the side of the air outlet close to the air outlet.

[0012] Further, the flue gas mixing device comprises a second shell and baffles, the baffles are provided in two groups, each group comprises a plurality of annular baffles, the baffles are arranged in an inclined manner, the two groups of baffles are arranged in up-down mode, the two baffles corresponding to each other in the two groups are arranged in opposite directions, an inlet is formed between two adjacent baffles in the group located at the lower side, and an outlet is formed between two adjacent baffles in the group located at the upper side.

[0013] Further, the air outlet tank comprises a second air inlet, the second air inlet is connected with a hot blast stove, and the second air inlet is located at one end of the air outlet tank close to the air outlet.

[0014] Further, the first air inlet and the second air inlet are both provided with control valves.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. The utility model discloses a unit CO catalytic oxidation design, each catalytic unit can be independently respectively carried out online thermal analysis, and the catalytic unit can switch operation, avoids the short -term deactivation of catalyst, frequent replacement and increases the operation cost, prolongs the use time of catalyst, improves the device economy, and does not influence the normal production of sintering when cutting out and replacing catalyst or overhauling and maintaining.

[0017] 2. The hot air used in the embodiment comes from the hot air furnace of the sinter flue gas denitration system, and does not need to additionally increase the thermal analysis furnace, and the heat source of thermal analysis is the hot air of the hot air furnace of the denitration system, only the flow path of part of the hot air is changed, and the hot flue gas after analysis is mixed with the remaining sinter flue gas and is also used for flue gas temperature rise, meets the subsequent denitration requirement, therefore, the analysis heat energy can be completely utilized, and the analysis does not additionally increase the energy consumption of the original desulfurization and denitration system, and is energy-saving and environment-friendly. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic view of the embodiment.

[0019] Figure 2 It is a sectional view of the embodiment.

[0020] Figure 3 It is a schematic view of the adjusting device in the embodiment.

[0021] Figure 4 It is a sectional view of the adjusting device in the embodiment.

[0022] Figure 5 It is a sectional view of the flue gas mixing device in the embodiment.

[0023] The drawing comprises: 1, the air inlet of air inlet box 11, 12, the first connecting port of first connecting port 2, the catalytic unit of catalytic unit 21, the adjusting device of adjusting device 211, the fan blade of fan blade 2111, the notch of notch 2112, the first shell of first shell 212, the baffle of baffle 2121, the motor of motor 213, the rotating shaft of rotating shaft 214, the gear of gear 215, the toothed belt of toothed belt 216, 22, the air inlet device of air inlet device 221, the first air inlet of first air inlet 23, the catalytic device of catalytic device 24, the flue gas mixing device of flue gas mixing device 241, the second shell of second shell 242, the baffle of baffle 243, the inlet of inlet 244, the outlet of outlet 244, 25, the catalyst of catalyst 251, the air hole of air hole 3, the air outlet of air outlet box 31, the second connecting port of second connecting port 32, the second air inlet of second air inlet 33, 4, the air outlet device of air outlet device 41, the third shell of third shell 411, the air outlet of air outlet 5, the control valve of control valve. DETAILED DESCRIPTION

[0024] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] like Figures 1-5 As shown, this embodiment discloses a CO oxidation catalytic device for sintering flue gas, including an inlet box 1, a catalytic unit 2, an outlet box 3, and an outlet device 4. The inlet box 1 includes at least one inlet 11 and multiple first connection ports 12. The multiple first connection ports 12 are connected to the inlet 11. The inlet 11 is connected to the heat exchanger of the GGH as a flue gas inlet. Each first connection port 12 is connected to a catalytic unit 2. The catalytic unit 2 includes two regulating devices 21, an air inlet device 22, and a catalytic device 23. The first regulating device 21, the air inlet device 22, the catalytic device 23, and the second regulating device 21 are stacked from bottom to top. Each catalytic unit 2 can be controlled independently. When one catalytic unit 2 is working, the other catalytic units 2 only serve to connect.

[0026] The regulating device 21 includes a first housing 212, multiple fan blades 211, a motor 213, a rotating shaft 214, gears 215, and a toothed belt 216. The regulating device 21 includes a motor 213 installed in the first housing 212, multiple rotating shafts 214, one of which is connected to the motor 213. The rotating shaft 214 passes through the first housing 212, and the fan blades 211 are installed on the rotating shaft 214. The multiple fan blades 211 are arranged at intervals and can rotate. One end of the rotating shaft 214 extends out of the first housing 212, and a gear 215 is installed at the end of the rotating shaft 214 extending out of the first housing 212. All gears 215 are connected to each other through a toothed belt 216, so that the motor 213 can drive all the fan blades 211 to rotate simultaneously. The two regulating devices 21 regulate the amount of flue gas entering and exiting the catalytic unit 2.

[0027] When the fan blades 211 are in a vertical state, all the fan blades 211 are oriented in the same direction as the flow direction of the flue gas, and the ventilation volume of the adjusting device 21 reaches the maximum. The greater the angle between the inclined state of the fan blades 211 and the vertical direction, the smaller the ventilation volume of the adjusting device 21. The ventilation volume of the adjusting device 21 can be adjusted to adjust the temperature of the flue gas and the effect of the oxidation catalyst. The fan blades 211 include two blades 2111, and the blades 2111 are provided with notches 2112. When the fan blades 211 are in a horizontal state, the notches 2112 of two adjacent fan blades 211 abut. The inner wall of the first shell 212 is provided with two baffles 2121, and the two baffles 2121 are located on the two side walls of the first shell 212 in opposite positions. When the fan blades 211 are in a horizontal state, the blades 2111 of the two fan blades 211 at both ends abut against the baffles 2121. When the fan blades 211 are in a horizontal state, the two adjacent fan blades 211 are closed, and the fan blades 211 at both ends are closed by abutting against the baffles 2121. The entire adjusting device 21 will be in a closed state.

[0028] The air inlet device 22 includes a first air inlet 221 connected to a hot blast furnace. The hot blast furnace heats the flue gas entering the catalytic unit 2 to a temperature at which the flue gas can be oxidized and catalyzed. The first air inlet 221 is provided with a control valve 5. After the first catalytic unit 2 operates for a period of time, the adjusting device of the first catalytic unit 2 increases the ventilation volume to the maximum. The control valve 5 gradually closes the first air inlet 221, so that hot air no longer enters the first catalytic unit 2, and the temperature of the first catalytic unit 2 decreases, so that the flue gas is no longer oxidized and catalyzed. Then, the first air inlet 221 of the next catalytic unit 2 is opened, so that the second catalytic unit 2 starts to work. In this way, the first catalytic unit 2 works after the last catalytic unit 2 works. The temperature reduction of the catalytic unit 2 can restore its activity, so that it can be reused. The catalytic unit 2 can be analyzed online, which avoids short-term deactivation of the catalyst 25 and frequent replacement to increase the operating cost. The use time of the catalyst 25 is prolonged, and the economic efficiency of the device is improved.

[0029] The catalytic unit 2 includes a flue gas mixing device 24 installed in the air inlet device 22. The flue gas mixing device 24 is located above the first air inlet 221. The flue gas mixing device 24 includes a second shell 241 and baffles 242. The baffles 242 are provided in two groups, each group including a plurality of annularly distributed baffles 242. The baffles 242 are arranged in an inclined manner. The two groups of baffles 242 are arranged in an up-down manner. The two baffles 242 corresponding to the upper and lower positions in the two groups are arranged in opposite inclined directions. Adjacent two baffles 242 in the group at the lower position form an inlet 243. Adjacent two baffles 242 in the group at the upper position form an outlet 244. The flue gas mixing device 24 forms a complex flow channel, so that the flow rate of the flue gas and the hot air entering the flue gas mixing device 24 is slowed down. The inclined baffles 242 form a zigzag flow channel, so that the flue gas and the hot air can be better mixed and heated.

[0030] The catalytic device 23 is provided with a catalyst 25 in a honeycomb cylinder shape, which can maximize the contact area with flue gas, and the catalyst 25 is provided with a plurality of air holes 251 communicating the upper end face and the lower end face of the catalyst 25, and the air holes 251 communicate the air inlet device 22 and the adjusting device 21 located above. The catalyst 25 used in the embodiment is prepared by using MnO2, CuO, CeO2 and the like as the main active component and a high dispersion rate uniform distribution method, and is a high-efficiency waste gas catalytic oxidation catalyst, which has high catalytic efficiency, strong purification performance, wide operating temperature range, long service life, wide application scene, safe use, and lower material cost compared with the traditional CO oxidation catalyst with Au or Pt as the active component.

[0031] The gas outlet tank 3 includes at least one gas outlet 31 and a plurality of second connecting ports 32, each second connecting port 32 connects an adjusting device 21 at the upper end, and the plurality of second connecting ports 32 connect the gas outlet 31. The gas outlet tank 3 includes a second air inlet 33 connected to a hot blast stove, the second air inlet 33 is located at one end of the gas outlet tank 3 close to the gas outlet 31, and the second air inlet 33 is provided with a control valve 5. The hot air entering the second air inlet 33 heats the flue gas sent out by the catalytic unit 2, so that the sent flue gas can reach the required temperature for SCR process denitrification. The hot air used by the catalytic unit 2 and the second air inlet 33 comes from the hot blast stove of the original sintering flue gas denitrification system, and no additional heat analysis furnace is needed. The heat source for heat analysis is the hot air of the denitrification system hot blast stove. The analysis process only changes the flow path of part of the hot air. The analyzed hot flue gas is mixed with the remaining sintering flue gas and is also used for flue gas warming to meet the subsequent denitrification requirements. Therefore, the analysis heat can be fully utilized, and the analysis does not increase the energy consumption of the original desulfurization and denitrification system, which is energy-saving and environmentally friendly.

[0032] The gas outlet device 4 is installed at the gas outlet 31, and the gas outlet device 4 includes a third shell 41. The gas outlet device 4 is provided with a smoke mixing device 24, and the third shell 41 is provided with an air outlet 411. The smoke mixing device 24 is located at one side of the air outlet 411 close to the gas outlet 31. The smoke mixing device 24 can mix the flue gas output by the gas outlet 31 and the hot air entering the second air inlet 33.

[0033] The above is only a preferred embodiment of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solutions falling within the scope of the present application are within the protection scope of the present application. It should be noted that, for ordinary technical personnel in the technical field, some improvements and decorations without departing from the principles of the present application are also considered as the protection scope of the present application.

Claims

1. A catalytic oxidation device for sintering flue gas CO, characterized in that, The system includes an air intake box (1), a catalytic converter (2), and an air outlet box (3). The air intake box (1) includes at least one air inlet (11) and multiple first connection ports (12). The multiple first connection ports (12) are connected to the air inlet (11). Each first connection port (12) is connected to one catalytic converter (2). The catalytic converter (2) includes two regulating devices (21), an air intake device (22), and a catalytic converter (23). The first regulating device (21), the air intake device (22), the catalytic converter (23), and the second regulating device (23) are connected together. 1) The two regulating devices (21) are arranged in layers from bottom to top to regulate the amount of flue gas entering and exiting the catalytic unit (2). The air inlet device (22) includes a first air inlet (221) connected to a hot air furnace. The catalytic device (23) contains a catalyst (25). The gas outlet box (3) includes at least one gas outlet (31) and multiple second connection ports (32). Each second connection port (32) is connected to one of the regulating devices (21) at the top. The multiple second connection ports (32) are connected to the gas outlet (31).

2. The catalytic oxidation device for sintering flue gas CO according to claim 1, characterized in that, The regulating device (21) includes a first housing (212) and a plurality of fan blades (211). The plurality of fan blades (211) are arranged at intervals. The fan blades (211) are rotatable. When the fan blades (211) are in a vertical state, the ventilation volume of the regulating device (21) is the largest. When the fan blades (211) are in a horizontal state, the regulating device (21) is closed.

3. The catalytic oxidation device for sintering flue gas CO according to claim 2, characterized in that, The adjusting device (21) includes a motor (213), a rotating shaft (214), a gear (215), and a toothed belt (216). The motor (213) is installed in the first housing (212). There are multiple rotating shafts (214), one of which is connected to the motor (213). The rotating shaft (214) passes through the first housing (212). The fan blade (211) is installed on the rotating shaft (214). One end of the rotating shaft (214) extends out of the first housing (212). The gear (215) is installed at the end of the rotating shaft (214) that extends out of the first housing (212). All the gears (215) are connected to each other by the toothed belt (216).

4. The catalytic oxidation device for sintering flue gas CO according to claim 2, characterized in that, The fan blade (211) includes two blades (2111), each blade (2111) having a notch (2112). When the fan blade (211) is in a horizontal state, the notches (2112) of two adjacent fan blades (211) abut against each other. The inner wall of the first housing (212) is provided with two baffles (2121), which are located on two side walls of the first housing (212) at opposite positions. When the fan blade (211) is in a horizontal state, the blades (2111) of the two fan blades (211) at both ends abut against the baffles (2121).

5. The catalytic oxidation device for sintering flue gas CO according to claim 1, characterized in that, The catalyst (25) is provided with a plurality of vent holes (251), the vent holes (251) are connected to the upper end face and the lower end face of the catalyst (25), and the vent holes (251) are connected to the air inlet device (22) and the regulating device (21) located above.

6. The catalytic oxidation device for sintering flue gas CO according to claim 1, characterized in that, The catalytic unit (2) includes a flue gas mixing device (24), which is installed inside the air inlet device (22) and is located above the first air inlet (221).

7. The catalytic oxidation device for sintering flue gas CO according to claim 1, characterized in that, It includes an exhaust device (4), which is installed at the exhaust port (31). The exhaust device (4) includes a third housing (41), and a flue gas mixing device (24) is installed inside the exhaust device (4). The third housing (41) is provided with an air outlet (411), and the flue gas mixing device (24) is located on the side of the air outlet (411) close to the exhaust port (31).

8. A catalytic oxidation device for sintering flue gas CO according to claim 6 or 7, characterized in that, The flue gas mixing device (24) includes a second housing (241) and baffles (242). The baffles (242) are provided in two sets, each set including multiple annularly distributed baffles (242). The baffles (242) are inclined and arranged vertically in the two sets. The two baffles (242) in the two sets are inclined in opposite directions. An inlet (243) is formed between two adjacent baffles (242) in the lower set, and an outlet (244) is formed between two adjacent baffles (242) in the upper set.

9. The catalytic oxidation device for sintering flue gas CO according to claim 1, characterized in that, The air outlet box (3) includes a second air inlet (33), which is connected to the hot air furnace. The second air inlet (33) is located at one end of the air outlet box (3) near the air outlet (31).

10. The catalytic oxidation device for sintering flue gas CO according to claim 9, characterized in that, Both the first air inlet (221) and the second air inlet (33) are equipped with control valves (5).

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