A steel plant sintering flue gas treatment reaction heat recovery device and method

Abstract

The present application relates to the technical field of flue gas treatment, and discloses a steel plant sintering flue gas treatment reaction heat recovery device and method, wherein the steel plant sintering flue gas treatment reaction heat recovery device comprises: a rotary heat exchange mechanism, which comprises a shell assembly, a rotary heat storage assembly and a driving assembly; a low-temperature flue gas introduction channel, a flue gas treatment channel and a high-temperature flue gas export channel; and a follow-up descaling mechanism, which comprises an energy storage type sliding scraping assembly, a folding type pushing assembly and a telescopic limiting assembly; the follow-up descaling mechanism is additionally arranged on the rotary heat storage assembly of the rotary heat exchange mechanism, so that the follow-up descaling mechanism can be in contact with the shell assembly of the rotary heat exchange mechanism and drive the follow-up descaling mechanism to effectively descale the surface of the rotary heat storage assembly during the rotation of the rotary heat storage assembly, thereby preventing the flue gas flow channel from being blocked due to long-term use and effectively ensuring the long-term and efficient operation stability of the rotary heat exchange mechanism.

Description

Technical Field

[0001] This invention relates to the field of flue gas treatment technology, and more specifically, to a device and method for recovering reaction heat from sintering flue gas in a steel plant. Background Technology

[0002] In industries such as steel and metallurgy, waste gas dust removal and desulfurization technologies are relatively mature. However, due to the low temperature of industrial waste gases (<180℃), low-temperature denitrification (NOx) is a challenge. X The problem of low NOx removal efficiency and the need for separate CO purification treatment means that additional heating equipment is required to raise the temperature of the low-temperature industrial waste gas to ensure that the temperature of the industrial waste gas reaches the optimal activity temperature window of the NOx removal / CO removal catalyst, thereby ensuring the denitrification / carbon removal efficiency of the system.

[0003] Currently, during flue gas treatment, the heat of chemical reaction released by CO catalytic oxidation is discharged with the flue gas. This heat energy can be exchanged with the initial flue gas through a heat exchanger, thereby effectively increasing the temperature of the flue gas at the inlet of the flue gas treatment system, improving energy recovery efficiency and reducing the energy consumption of the reheating system. However, in common heat exchangers, scale easily forms on the surface of the heat storage elements during long-term use. This can block the flue gas flow channels of the heat storage elements, thereby increasing the resistance of the flue gas system. Increased resistance can cause the booster fan to surge, and the power consumption of the desulfurization system will also increase accordingly. In addition, the increase in the differential pressure of the heat exchanger will reduce the negative pressure of the boiler furnace, threatening the safe operation of the desulfurization system. In some cases, in order to deal with these problems, the plant has to keep the bypass running for a long time and clean the heat storage elements, which undoubtedly brings significant safety hazards. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for recovering reaction heat in the treatment of sintering flue gas in steel plants in order to solve the above-mentioned problems.

[0005] This invention provides a reaction heat recovery device for treating sintering flue gas in a steel plant, comprising:

[0006] A rotary heat exchange mechanism, comprising a housing assembly, a rotary heat storage component coaxially connected inside the housing assembly, and a drive assembly fixedly connected to the housing assembly, the drive assembly being used to drive the rotary heat storage component to rotate at a set speed.

[0007] The rotary heat storage component is used to transfer the heat energy of the high-temperature flue gas to the low-temperature flue gas. It includes a low-temperature flue gas inlet channel connected to the low-temperature flue gas inlet end of the housing assembly, a flue gas treatment channel connected between the low-temperature flue gas outlet end and the high-temperature flue gas inlet end of the housing assembly, and a high-temperature flue gas outlet channel connected to the high-temperature flue gas outlet end of the housing assembly.

[0008] A plurality of follow-up descaling mechanisms are provided on the rotary heat storage component. The follow-up descaling mechanism includes an energy storage sliding scraping component provided on the rotary heat storage component, a folding pushing component slidably connected to the energy storage sliding scraping component, and a telescopic limiting component fixedly connected to the folding pushing component. When the telescopic limiting component is in its longest state, the folding pushing component is in an integral state. When the limiting component is in its shortest state, the folding pushing component is in a folded state. The folding pushing component in the integral state is used to contact a set area of ​​the outer shell component and provide thrust to the energy storage sliding scraping component. The folding pushing component in the folded state is bent into the energy storage sliding scraping component.

[0009] As a further optimization of the present invention, the outer shell assembly includes a lower beam, an upper beam symmetrically arranged with respect to the lower beam, an annular outer shell connected between the lower beam and the upper beam, a low-temperature flue gas inlet and a high-temperature flue gas outlet connected between the lower beam and the annular outer shell, and a low-temperature flue gas outlet and a high-temperature flue gas inlet connected between the upper beam and the annular outer shell. The low-temperature flue gas inlet and the high-temperature flue gas outlet are symmetrically arranged on both sides of the lower beam and on both sides of the upper beam. The low-temperature flue gas inlet channel is connected to the low-temperature flue gas inlet. The input end and the output end of the flue gas treatment channel are respectively connected to the low-temperature flue gas outlet and the high-temperature flue gas inlet. The high-temperature flue gas outlet channel is connected to the high-temperature flue gas outlet.

[0010] As a further optimization of the present invention, the rotary heat storage component includes a connecting shaft, an outer ring body coaxially disposed around the connecting shaft, and a plurality of heat storage plates disposed between the connecting shaft and the outer ring body, wherein the plurality of heat storage plates constitute a grid-shaped heat storage element.

[0011] As a further optimization of the present invention, the drive assembly includes a motor and a transmission shaft connected to the output shaft end of the motor. The motor is fixedly connected to the upper beam, and the connecting shaft body is fixedly connected to the transmission shaft.

[0012] As a further optimization of the present invention, the energy storage sliding scraping assembly includes a T-shaped translational slide groove disposed on the heat storage plate, an inclined translational slide groove disposed on the upper surface of the heat storage plate and communicating with the T-shaped translational slide groove, a T-shaped translational slider 1 slidably disposed in the T-shaped translational slide groove, two cleaning components symmetrically connected to the T-shaped translational slider 1, and a spring 2 connected between the T-shaped translational slider 1 and the inner wall of the T-shaped translational slide groove. The T-shaped translational slide groove and the spring 2 are both arranged along the length direction of the heat storage plate. The inclined translational slide groove is arranged along the line connecting two symmetrical corners on the heat storage plate. The T-shaped translational slider 1 is provided with a T-shaped adapter slide groove that cooperates with the folding push assembly. The T-shaped adapter slide groove communicates with the inclined translational slide groove, and the arrangement direction of the T-shaped adapter slide groove is perpendicular to the arrangement direction of the inclined translational slide groove.

[0013] As a further optimization of the present invention, the folding push assembly includes a second T-shaped translation slider, a hinge connected to the second T-shaped translation slider, a driven slider connected to the hinge, a fixed shaft fixedly connected to the driven slider, and a movable sleeve shaft movably connected to the fixed shaft. The second T-shaped translation slider is disposed in a T-shaped fitting groove, and the hinge is connected to one end of the second T-shaped translation slider located outside the T-shaped fitting groove. The driven slider is configured to cooperate with the second T-shaped translation slider, and both the fixed shaft and the movable sleeve shaft are located outside the heat storage plate.

[0014] As a further optimization of the present invention, an elastic reset component is connected between the second T-shaped translation slider and the driven slider. The first elastic reset component includes a second connector fixedly connected to the second T-shaped translation slider, a first connector fixedly connected to the driven slider, and an elastic element connected between the first connector and the second connector.

[0015] As a further optimization of the present invention, the telescopic limiting component includes a telescopic support rod, a wedge block fixedly connected to one end of the telescopic support rod, and a spring fixedly connected to the wedge block. The spring block surrounds the periphery of the telescopic support rod, and the other end of the telescopic support rod is fixedly connected to a T-shaped translation slider. When the telescopic support rod is in its longest state, the wedge block contacts the hinge. When the telescopic support rod is in its shortest state, the wedge block is located in the T-shaped adaptive groove.

[0016] As a further optimization of the present invention, an extrusion plate is connected to the inner wall of the inclined translation slide, the lower end face of the extrusion plate is flush with the upper end face of the T-shaped translation slider, and the T-shaped translation slider is provided with a wedge surface that cooperates with the extrusion plate.

[0017] A method for recovering reaction heat from sintering flue gas in a steel plant, employing the aforementioned reaction heat recovery device for treating sintering flue gas in a steel plant, includes the following steps:

[0018] Step 1: The raw low-temperature flue gas is introduced into the low-temperature flue gas input end of the shell assembly from the low-temperature flue gas inlet channel. After flowing through the rotary heat storage component, it is heated to the preset temperature and then enters the flue gas treatment channel from the low-temperature flue gas output end of the shell assembly.

[0019] Step 2: The flue gas flows sequentially through the high and low temperature fluid rapid mixer, multi-media gas phase mixer, flue gas guiding mechanism and denitrification carbon purification catalyst arrangement layer arranged in the flue gas treatment channel to form high temperature flue gas. The high temperature flue gas is output from the other end of the flue gas treatment channel to the high temperature flue gas input end of the shell assembly. The rotary heat storage component contacts the high temperature flue gas and stores heat. The part after heat storage rotates to the low temperature flue gas input port.

[0020] Step 3: Discharge the high-temperature flue gas flowing through the rotary heat storage component from the high-temperature flue gas outlet channel.

[0021] The beneficial effects of this invention are as follows: By adding multiple sets of follow-up descaling mechanisms to the rotary heat storage component of the rotary heat exchanger, the follow-up descaling structure can effectively descale the surface of the rotary heat storage component during its rotation by contacting the outer shell component of the rotary heat exchanger and using the resistance provided by the outer shell component. This prevents blockage of the flue gas flow channel due to long-term use and effectively ensures the stability of the long-term, efficient operation of the rotary heat exchanger. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a view showing the mating of the outer shell assembly and the drive assembly of the rotary heat exchange mechanism of the present invention;

[0024] Figure 3 This is a schematic diagram of the rotary heat storage component of the rotary heat exchange mechanism of the present invention;

[0025] Figure 4 This is a view showing the interaction between the heat storage plate and the follow-up descaling mechanism of the present invention;

[0026] Figure 5 This is the invention Figure 4 An enlarged view of point A in the image;

[0027] Figure 6 This is the invention Figure 4 An enlarged view of point B in the image;

[0028] Figure 7 This is a partial cross-sectional view of the follow-up descaling mechanism of the present invention.

[0029] In the diagram: 1. Rotary heat exchanger; 101. Lower beam; 102. Upper beam; 103. Annular outer shell; 104. Low-temperature flue gas inlet; 105. Low-temperature flue gas outlet; 106. High-temperature flue gas inlet; 107. High-temperature flue gas outlet; 108. Motor; 109. Coupling; 110. Heat storage plate; 111. Outer ring; 2. Low-temperature flue gas inlet channel; 3. Flue gas treatment channel; 4. High and low temperature fluid rapid mixer; 5. Multi-media gas phase mixer; 6. Flue gas guiding mechanism; 7. Denitrification and carbon removal catalyst. 8. Agent arrangement layer; 9. High-temperature flue gas outlet channel; 10. Follow-up descaling mechanism; 11. T-shaped translation slide; 12. Inclined translation slide; 13. T-shaped translation slider one; 14. T-shaped adapter slide; 15. T-shaped translation slider two; 16. Hinge; 17. Driven slider; 18. Fixed shaft; 19. Movable sleeve shaft; 10. Connector one; 11. Connector two; 12. Telescopic support rod; 13. Wedge block; 14. Spring one; 15. Descaling component; 16. Spring two. Detailed Implementation

[0030] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed merely to enable those skilled in the art to better understand and implement the subject matter described herein. Furthermore, features described in some examples may be combined in other examples.

[0031] like Figures 1 to 7 As shown, a reaction heat recovery device for treating sintering flue gas in a steel plant includes:

[0032] The rotary heat exchange mechanism 1 includes a shell assembly, a rotary heat storage component coaxially connected inside the shell assembly, and a drive assembly fixedly connected to the shell assembly. The drive assembly is used to drive the rotary heat storage component to rotate at a set speed.

[0033] The low-temperature flue gas inlet channel 2 is connected to the low-temperature flue gas inlet end of the housing assembly, the flue gas treatment channel 3 is connected between the low-temperature flue gas outlet end and the high-temperature flue gas inlet end of the housing assembly, and the high-temperature flue gas outlet channel 8 is connected to the high-temperature flue gas outlet end of the housing assembly. The rotary heat storage component is used to transfer the heat energy of the high-temperature flue gas to the low-temperature flue gas.

[0034] A plurality of follow-up descaling mechanisms 9 are provided on the rotary heat storage component. Each follow-up descaling mechanism 9 includes an energy storage sliding scraping component provided on the rotary heat storage component, a folding pushing component slidably connected to the energy storage sliding scraping component, and a telescopic limiting component fixedly connected to the folding pushing component. When the telescopic limiting component is in its longest state, the folding pushing component is in its entirety state. When the limiting component is in its shortest state, the folding pushing component is in its folded state. The folding pushing component in its entirety state is used to contact a set area of ​​the outer shell component and provide thrust to the energy storage sliding scraping component. The folding pushing component in its folded state is bent into the energy storage sliding scraping component.

[0035] It should be noted that when using the above equipment to treat sintering flue gas from a steel plant, the following steps are included in the heat recovery process:

[0036] Step 1: The raw low-temperature flue gas is introduced into the low-temperature flue gas input end of the shell assembly from the low-temperature flue gas inlet channel 2, flows through the rotary heat storage component and is heated to the preset temperature 1, and then enters the flue gas treatment channel 3 from the low-temperature flue gas output end of the shell assembly.

[0037] Step 2: The flue gas flows sequentially through the high and low temperature fluid rapid mixer 4, the multi-media gas phase mixer 5, the flue gas guiding mechanism 6, and the denitrification and carbon purification catalyst arrangement layer 7 arranged in the flue gas treatment channel 3 to form high temperature flue gas. The high temperature flue gas is output from the other end of the flue gas treatment channel 3 to the high temperature flue gas input end of the shell assembly. The rotary heat storage component contacts the high temperature flue gas and stores heat. The part after heat storage rotates to the low temperature flue gas input port, thereby effectively improving the reaction heat energy recovery efficiency.

[0038] Among them, the high and low temperature fluid rapid mixer 4 is composed of an electric heater fixed head, a heating chamber, an electric heating device and a flue gas distribution pipe, etc. It can quickly and evenly mix the low temperature flue gas with the high temperature hot air to ensure that the temperature of the mixed flue gas reaches the optimal activity temperature window of 120℃-180℃ of the NOx removal / CO removal catalyst.

[0039] In the denitrification / carbon removal reaction, ammonia and oxygen are important participating media. In order to ensure that ammonia, oxygen and flue gas in flue gas treatment channel 3 are mixed quickly and evenly, thereby improving the denitrification / carbon removal efficiency and reducing the risk of ammonia escape, three types of multi-media gas phase mixers 5, namely grid type, mixing type and vortex type, have been developed. One or more of them can be selected for use in combination.

[0040] Among them, there are multiple variable cross-sections and turning areas in the flue gas treatment channel 3. Under non-optimized conditions, uneven flow velocity distribution will occur, resulting in an imbalance between the flue gas treatment capacity of the catalyst in different areas and the amount of flue gas passing through, causing low denitrification efficiency. Therefore, a reactor flue gas guiding structure is required to optimize the flow field. The arrangement can be designed according to the specific structure of the flue gas treatment channel 3.

[0041] Among them, the denitrification and carbon removal catalyst arrangement layer 7 adopts a vertical partition design. The desulfurization flue gas passes through a double-layer denitrification catalyst plate (considering that NOx needs to be fully reacted) and a single-layer oxidation catalyst plate (CO is oxidized to CO2 and releases a large amount of heat). The denitrification catalyst plate and the oxidation catalyst plate are made of a new type of SiC porous carrier prepared by using camellia fruit shell powder (carbon source) and silicon powder (silicon source) as raw materials. Based on the SiC porous carrier, VWTi@SiC denitrification and PtMTi@SiC decarbonization catalysts are prepared by coating method and impregnation process respectively. The two catalysts are integrated into a modular design to form a denitrification catalyst plate and an oxidation catalyst plate. CO is oxidized to CO2 and releases a large amount of heat, which is transferred by the flue gas to the rotary heat storage component. After being absorbed by the rotary heat storage component, it is transferred to the low-temperature flue gas for preliminary heating of the low-temperature flue gas.

[0042] Step 3: Discharge the high-temperature flue gas flowing through the rotary heat storage component from the high-temperature flue gas outlet channel 8.

[0043] In an optional embodiment of the invention, such as Figures 1 to 3 As shown, the outer casing assembly includes a lower beam 101, an upper beam 102 symmetrically arranged with respect to the lower beam 101, an annular outer casing 103 connected between the lower beam 101 and the upper beam 102, a low-temperature flue gas inlet 104 and a high-temperature flue gas outlet 107 connected between the lower beam 101 and the annular outer casing 103, and a low-temperature flue gas outlet 105 and a high-temperature flue gas inlet 106 connected between the upper beam 102 and the annular outer casing 103. The low-temperature flue gas inlet 104 and the high-temperature flue gas outlet 107 are symmetrically arranged on both sides of the lower beam 101, and the low-temperature flue gas outlet 105 and the high-temperature flue gas inlet 106 are symmetrically arranged on both sides of the upper beam 102. The low-temperature flue gas inlet channel 2 is connected to the low-temperature flue gas inlet 104. The input end and the output end of the flue gas treatment channel 3 are respectively connected to the low-temperature flue gas outlet 105 and the high-temperature flue gas inlet 106. The high-temperature flue gas outlet channel 8 is connected to the high-temperature flue gas outlet 107.

[0044] The rotary heat storage component includes a connecting shaft 109, an outer ring 111 coaxially disposed around the connecting shaft 109, and a plurality of heat storage plates 110 disposed between the connecting shaft 109 and the outer ring 111, the plurality of heat storage plates 110 constituting a grid-shaped heat storage element.

[0045] The drive assembly includes a motor 108 and a transmission shaft connected to the output shaft end of the motor 108. The motor 108 is fixedly connected to the upper beam 102, and the connecting shaft 109 is fixedly connected to the transmission shaft.

[0046] It should be noted that, as mentioned above, the low-temperature flue gas inlet 104, the annular outer shell 103, and the low-temperature flue gas outlet 105 form a preliminary heating zone for low-temperature flue gas. Flue gas in this zone can flow through the channels on the grid-like heat storage elements within this zone and contact multiple heat storage plates 110 in this area, thereby absorbing the heat energy on the heat storage plates 110 and increasing their temperature. Similarly, high-temperature flue gas flows sequentially through the high-temperature flue gas inlet 106 and the annular outer shell 103 and exits from the high-temperature flue gas outlet 107. The high-temperature flue gas then contacts the heat storage plates 110 within this zone, allowing the heat storage plates 110 in this zone to absorb and store the heat energy from the high-temperature flue gas, which is then used to heat the low-temperature flue gas when it rotates to the low-temperature flue gas area. As the heat storage plate 110 rotates with the connecting shaft 109, when it passes the upper beam 102, its folding push assembly contacts the upper beam 102 and, under resistance, drives the energy-storing sliding scraping assembly along a set path. The device moves and, during this movement, scrapes and cleans the two side walls of the heat storage plate 110, effectively removing residual dust, particulate matter, and some liquid impurities from the flue gas. This effectively prevents the accumulation of a large amount of hard dirt on the two side walls of the heat storage plate 110 after prolonged use, ensuring the stability of the airflow of the rotary heat storage component during long-term use. When the energy storage sliding scraping component moves along the set path to the end point, that is, after cleaning the two side walls of the heat storage plate 110 in one direction, the telescopic limiting component is compressed into the energy storage sliding scraping component. At this time, the folding pushing component is no longer limited to a whole and can be folded. Therefore, the part that contacts the upper beam 102 bends into the energy storage sliding scraping component under the action of resistance, allowing the heat storage plate 110 to pass smoothly through the upper beam 102. This process does not require external power supply, is fully compatible with the rotation process of the heat storage plate 110, and has a good cleaning effect, high integration, and no impact on the flue gas flow.

[0047] In an optional embodiment of the invention, such as Figures 3 to 7As shown, the energy storage sliding scraping assembly includes a T-shaped translational groove 901 disposed on the heat storage plate 110, an inclined translational groove 902 disposed on the upper end face of the heat storage plate 110 and communicating with the T-shaped translational groove 901, a T-shaped translational slider 903 slidably disposed in the T-shaped translational groove 901, two cleaning components 915 symmetrically connected to the T-shaped translational slider 903, and a spring 916 connected between the T-shaped translational slider 903 and the inner wall of the T-shaped translational groove 901. Both the T-shaped translation slide 901 and the second spring 916 are arranged along the length of the heat storage plate 110. The inclined translation slide 902 is arranged along the line connecting the two symmetrical corners on the heat storage plate 110. The first T-shaped translation slider 903 is provided with a T-shaped adapter slide 904 that cooperates with the folding push assembly. The T-shaped adapter slide 904 is connected to the inclined translation slide 902, and the arrangement direction of the T-shaped adapter slide 904 is perpendicular to the arrangement direction of the inclined translation slide 902.

[0048] It should be noted that, as mentioned above, when the folding push assembly contacts the upper beam 102, due to the inclined setting of the inclined translation slide 902, the position of the heat storage plate 110 near the upper beam 102 is the starting point of the stroke. This part first contacts the upper beam 102, and under the action of the resistance provided by the upper beam 102, it pushes the folding push assembly to move along the inclined translation slide 902. At this time, the T-shaped translation slider 903 will move synchronously with the folding push assembly, and drive the descaling component 915 connected to it to move synchronously. The descaling component 915 is in close contact with the side wall of the heat storage plate 110, and its cross-section is an isosceles trapezoid. During this movement, the impurities attached to the side wall of the heat storage plate 110 can be continuously scraped off by the wedge surface and moved along the wedge surface. As the impurities accumulate, the impurities scraped off later can squeeze the previously scraped impurities off the wedge surface. This process is within the coverage area of ​​the upper beam 102. Therefore, a corresponding [something] can be set at the lower beam 101. The collection area is sealed, and the impurities that fall on the lower beam 101 are removed into the sealed buffer space through a secondary sealing method and a mechanized material handling mechanism. After the lower beam 101 is closed, the impurities in the sealed buffer space can be directly discharged, which can effectively prevent impurities from accumulating inside the shell assembly. When the T-shaped translation slider 903 moves to the end of its stroke, the telescopic limiting component is squeezed and retracted into the T-shaped adapter groove 904. At this time, the folding push component also bends into the inclined translation groove 902. Therefore, the heat storage plate 110 can pass smoothly through the upper beam 102. During this process, the spring 916 is in a compressed energy storage state. When the heat storage plate 110 is removed from the coverage area of ​​the upper beam 102, the spring 916 can release energy and reset the T-shaped translation slider 903. The folding push component and the telescopic limiting component also reset to their initial state. This reset process can also scrape the side wall of the heat storage plate 110 in the opposite direction.

[0049] In an optional embodiment of the present invention, as shown in the figure, the folding push assembly includes a T-shaped translation slider 905, a hinge 906 connected to the T-shaped translation slider 905, a driven slider 907 connected to the hinge 906, a fixed shaft 908 fixedly connected to the driven slider 907, and a movable sleeve shaft 909 movably connected to the fixed shaft 908. The T-shaped translation slider 905 is disposed in a T-shaped fitting groove 904, and the hinge 906 is connected to the end of the T-shaped translation slider 905 located outside the T-shaped fitting groove 904. The driven slider 907 is configured to cooperate with the T-shaped translation slider 905. The fixed shaft 908 and the movable sleeve shaft 909 are both located outside the heat storage plate 110.

[0050] An elastic reset assembly is connected between the T-shaped translation slider 2 905 and the driven slider 907. The elastic reset assembly includes a connector 2 911 fixedly connected to the T-shaped translation slider 2 905, a connector 1 910 fixedly connected to the driven slider 907, and an elastic element connected between the connector 1 910 and the connector 2 911.

[0051] It should be noted that, as mentioned above, when the movable sleeve shaft 909 contacts the upper beam 102, the resistance generated by the upper beam 102 generates a component force in the direction of the inclined translation slide 902 and pushes the movable sleeve shaft 909 to move along the inclined translation slide 902. At this time, the hinge 906 is in a vertical state under the limiting action of the telescopic limiting component. Therefore, the driven slider 907 and the second T-shaped translation slider 905 are in a single unit state and cannot be bent. When the movable sleeve shaft 909 moves, it drives the driven slider 907 and the second T-shaped translation slider 905 to move in the same direction through the fixed shaft 908. The second T-shaped translation slider 905 is slidably disposed in the T-shaped fitting slide 904. Therefore, during the movement of the second T-shaped translation slider 905, it can drive the first T-shaped translation slider 903 to move in the same direction. The second T-shaped translation slider 905 drives the first T-shaped translation slider 903 to move in the same direction. 3. During the movement along the length of the heat storage plate 110, the path of the inclined translation slide 902 can be adapted to the vertical tilting slide 902 along the T-shaped adapting slide 904. During the movement of the second T-shaped translation slide 905, the telescopic limiting component can always keep in sync with the second T-shaped translation slide 905 and always limit and press the hinge 906, so that the hinge 906 remains in a vertical state. When the telescopic limiting component retracts into the T-shaped adapting slide 904, the hinge 906 can bend toward the inside of the inclined translation slide 902, and the elastic element connecting the first connector 910 and the second connector 911 bends. When the movable sleeve shaft 909 is no longer limited by the upper beam 102, the elastic element can reset and the driven slider 907 resets. At this time, the driven slider 907 contacts the second T-shaped translation slide 905.

[0052] In an optional embodiment of the invention, such as Figures 3 to 7As shown, the telescopic limiting assembly includes a telescopic support rod 912, a wedge block 913 fixedly connected to one end of the telescopic support rod 912, and a spring 914 fixedly connected to the wedge block 913. The spring 914 surrounds the periphery of the telescopic support rod 912. The other end of the telescopic support rod 912 is fixedly connected to a T-shaped translation slider 905. When the telescopic support rod 912 is in its longest state, the wedge block 913 contacts the hinge 906. When the telescopic support rod 912 is in its shortest state, the wedge block 913 is located in the T-shaped adapter groove 904.

[0053] An extrusion plate is connected to the inner wall of the inclined translation slide 902. The lower end face of the extrusion plate is flush with the upper end face of the T-shaped translation slider 903. The T-shaped translation slider 903 is provided with a wedge surface that cooperates with the extrusion plate.

[0054] It should be noted that, as mentioned above, when the wedge 913 contacts the hinge 906, the hinge 906 is compressed and cannot bend. When the T-shaped translation slider 903 moves to the end of the inclined translation groove 902, the extrusion plate contacts the wedge surface of the wedge 913 and forces the wedge 913 to move toward the inside of the T-shaped fitting groove 904. At this time, the telescopic support rod 912 and the spring 914 are in a compressed state until the wedge 913 no longer completely restricts the hinge 906. At this time, the hinge 906 can bend toward the inside of the inclined translation groove 902. When the movable sleeve shaft 909 no longer contacts the upper beam 102, the spring 914 resets and pushes the wedge 913 to re-contact the hinge 906, thereby forming a stable compression effect on the hinge 906.

[0055] The above description of this embodiment is not limited to the specific implementation described above. The specific implementation described above is merely illustrative and not restrictive. Those skilled in the art can make many other forms based on the guidance of this embodiment, all of which are within the protection scope of this embodiment.

Claims

1. A reaction heat recovery device for treating sintering flue gas in a steel plant, characterized in that, include: A rotary heat exchange mechanism (1) includes a shell assembly, a rotary heat storage component coaxially connected inside the shell assembly, and a drive assembly fixedly connected to the shell assembly. The drive assembly is used to drive the rotary heat storage component to rotate at a set speed. The rotary heat storage component is used to transfer the heat energy of the high-temperature flue gas to the low-temperature flue gas. The rotary heat storage component is connected to the low-temperature flue gas inlet channel (2) connected to the low-temperature flue gas inlet end of the outer shell assembly, the flue gas treatment channel (3) connected between the low-temperature flue gas outlet end and the high-temperature flue gas inlet end of the outer shell assembly, and the high-temperature flue gas outlet channel (8) connected to the high-temperature flue gas outlet end of the outer shell assembly. A plurality of follow-up descaling mechanisms (9) are provided on the rotary heat storage component. The follow-up descaling mechanism (9) includes an energy storage sliding scraping component provided on the rotary heat storage component, a folding pushing component slidably connected to the energy storage sliding scraping component, and a telescopic limiting component fixedly connected to the folding pushing component. When the telescopic limiting component is in the longest state, the folding pushing component is in the whole state. When the limiting component is in the shortest state, the folding pushing component is in the folded state. The folding pushing component in the whole state is used to contact the set area of ​​the shell component and provide thrust to the energy storage sliding scraping component. The folding pushing component in the folded state is bent into the energy storage sliding scraping component. The rotary heat storage component includes a connecting body (109), an outer ring body (111) coaxially disposed around the connecting body (109), and a plurality of heat storage plates (110) disposed between the connecting body (109) and the outer ring body (111). The plurality of heat storage plates (110) constitute a grid-shaped heat storage element. The energy-storing sliding scraping assembly includes a T-shaped translational groove (901) disposed on a heat storage plate (110), an inclined translational groove (902) disposed on the upper end face of the heat storage plate (110) and communicating with the T-shaped translational groove (901), a T-shaped translational slider (903) slidably disposed in the T-shaped translational groove (901), two cleaning components (915) symmetrically connected to the T-shaped translational slider (903), and a spring (916) connected between the T-shaped translational slider (903) and the inner wall of the T-shaped translational groove (901). The T-shaped translation slide (901) and the second spring (916) are both arranged along the length of the heat storage plate (110). The inclined translation slide (902) is arranged along the line connecting two symmetrical corners on the heat storage plate (110). The first T-shaped translation slider (903) is provided with a T-shaped adapter slide (904) that cooperates with the folding push assembly. The T-shaped adapter slide (904) is connected to the inclined translation slide (902), and the arrangement direction of the T-shaped adapter slide (904) is perpendicular to the arrangement direction of the inclined translation slide (902). The folding push assembly includes a T-shaped translation slider two (905), a hinge (906) connected to the T-shaped translation slider two (905), a driven slider (907) connected to the hinge (906), a fixed shaft (908) fixedly connected to the driven slider (907), and a movable sleeve shaft (909) movably connected to the fixed shaft (908). The T-shaped translation slider two (905) is located in a T-shaped fitting groove (904), and the hinge (906) is connected to one end of the T-shaped translation slider two (905) located outside the T-shaped fitting groove (904). The driven slider (907) is configured to cooperate with the T-shaped translation slider two (905). The fixed shaft (908) and the movable sleeve shaft (909) are both located outside the heat storage plate (110). The telescopic limiting assembly includes a telescopic support rod (912), a wedge (913) fixedly connected to one end of the telescopic support rod (912), and a spring (914) fixedly connected to the wedge (913). The spring (914) surrounds the periphery of the telescopic support rod (912). The other end of the telescopic support rod (912) is fixedly connected to a T-shaped translation slider (905). When the telescopic support rod (912) is in its longest state, the wedge (913) contacts the hinge (906). When the telescopic support rod (912) is in its shortest state, the wedge (913) is located in the T-shaped adapter groove (904).

2. The reaction heat recovery device for sintering flue gas treatment in a steel plant according to claim 1, characterized in that, The outer casing assembly includes a lower beam (101), an upper beam (102) symmetrically arranged with respect to the lower beam (101), an annular outer casing (103) connecting the lower beam (101) and the upper beam (102), a low-temperature flue gas inlet (104) and a high-temperature flue gas outlet (107) connecting the lower beam (101) and the annular outer casing (103), and a low-temperature flue gas outlet (105) and a high-temperature flue gas inlet (106) connecting the upper beam (102) and the annular outer casing (103). 04) and the high temperature flue gas outlet (107) are symmetrically arranged on both sides of the lower beam (101), the low temperature flue gas outlet (105) and the high temperature flue gas inlet (106) are symmetrically arranged on both sides of the upper beam (102), the low temperature flue gas inlet channel (2) is connected to the low temperature flue gas inlet (104), the input end and the output end of the flue gas treatment channel (3) are respectively connected to the low temperature flue gas outlet (105) and the high temperature flue gas inlet (106), and the high temperature flue gas outlet channel (8) is connected to the high temperature flue gas outlet (107).

3. The reaction heat recovery device for sintering flue gas treatment in a steel plant according to claim 2, characterized in that, The drive assembly includes a motor (108) and a transmission shaft connected to the output shaft end of the motor (108). The motor (108) is fixedly connected to the upper beam (102), and the connecting shaft body (109) is fixedly connected to the transmission shaft.

4. The reaction heat recovery device for sintering flue gas treatment in a steel plant according to claim 3, characterized in that, An elastic reset component is connected between the second T-shaped translation slider (905) and the driven slider (907). The elastic reset component includes a second connector (911) fixedly connected to the second T-shaped translation slider (905), a first connector (910) fixedly connected to the driven slider (907), and an elastic element connected between the first connector (910) and the second connector (911).

5. The reaction heat recovery device for sintering flue gas treatment in a steel plant according to claim 4, characterized in that, An extrusion plate is connected to the inner wall of the inclined translation slide (902). The lower end face of the extrusion plate is flush with the upper end face of the T-shaped translation slider (903). The T-shaped translation slider (903) is provided with a wedge surface that cooperates with the extrusion plate.

6. A method for recovering reaction heat from sintering flue gas in a steel plant, characterized in that, The reaction heat recovery device for treating sintering flue gas in a steel plant as described in any one of claims 1-5 includes the following steps: Step 1: The original low-temperature flue gas is introduced into the low-temperature flue gas input end of the shell assembly from the low-temperature flue gas inlet channel (2), flows through the rotary heat storage component and is heated to the preset temperature 1, and enters the flue gas treatment channel (3) from the low-temperature flue gas output end of the shell assembly. Step 2: The low-temperature flue gas flows through the high-low temperature fluid rapid mixer (4), multi-media gas phase mixer (5), flue gas guiding mechanism (6) and denitrification carbon purification catalyst arrangement layer (7) arranged in the flue gas treatment channel (3) to form high-temperature flue gas. The high-temperature flue gas is output from the other end of the flue gas treatment channel (3) to the high-temperature flue gas input end of the shell assembly. The rotary heat storage component contacts the high-temperature flue gas and stores heat. The part after heat storage rotates to the low-temperature flue gas input port. Step 3: Discharge the high-temperature flue gas flowing through the rotary heat storage component from the high-temperature flue gas outlet channel (8).

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