High-temperature flue gas filtering and purifying device

Abstract

The utility model provides a high-temperature flue gas filtering and purifying device which comprises a dust removal shell and a pneumatic conveying device which is fixedly arranged below the dust removal shell and is used for conveying fly ash, an air inlet and an air outlet are formed in the dust removal shell, an air inlet box is fixedly arranged in the dust removal shell and is communicated with the air inlet, a plurality of axial cyclones are fixedly arranged in the air inlet box, a blowing assembly is fixedly arranged above the air inlet box, and an evaporator assembly is fixedly arranged below the air inlet box. According to the utility model, the axial cyclone is fixedly arranged in the gas inlet box to filter the entering high-temperature flue gas, so that the coarse purification process of the high-temperature flue gas can be realized, the effective purification treatment of the high-temperature flue gas is ensured, and favorable conditions are provided for subsequent waste heat recovery of the high-temperature flue gas; the waste heat recovery efficiency of the waste heat recovery device is improved, the working operation reliability and stability of the waste heat recovery device are effectively improved, and the waste heat recovery service life is greatly prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to energy -conserving equipment technical field especially relates to a high temperature flue gas filtration purification device. BACKGROUND

[0002] The heat energy of high temperature flue gas is high in energy level due to high temperature, so it is easy to utilize, and generally should be converted into mechanical energy to the maximum extent for power, namely so-called "high quality high use". Before utilizing these "high quality" flue gas, gas-solid separation needs to be carried out on the high temperature flue gas, that is, high temperature flue gas dust is removed. High temperature dedusting technology has the following characteristics: (1) high dust removal temperature. The dust-containing gas to be purified has high temperature, and sometimes reaches 600-1400 DEG C; (2) fine dust removal particles. The dust particles are less than 5-10 microns, and even in submicron level; (3) high dust removal purification standard. The outlet concentration is required to be less than 5-10 mg / Nm3; (4) "high efficiency and low resistance", good economic performance; (5) good ash removal performance, online back flushing, small deformation, long service life; (6) strong corrosion resistance, excellent high temperature gas corrosion resistance, stable chemical performance. High temperature and high efficiency dedusting technology requires high, and simple gas-solid separation dedusting equipment cannot meet such stringent requirements.

[0003] In summary, high temperature gas dedusting is a technology of directly carrying out gas-solid separation at high temperature end under high temperature condition to realize gas purification, which can utilize physical sensible heat, chemical latent heat and power energy of the gas to the maximum extent and effectively utilize useful resources in the gas. At the same time, PM5 or PM2.5 or below ultrafine particles must be effectively captured and removed to meet the requirements of environmental protection standard outlet concentration less than 5-10 mg / Nm3 and subsequent heat energy utilization process. SUMMARY

[0004] The utility model wants to solve the technical problem of overcoming the defects existing in prior art, and the utility model proposes a high temperature flue gas filtration purification device, which can effectively remove large particle high temperature dust and sparks, reduce the probability of coal gas explosion or completely avoid the condition of coal gas explosion, reduce the impact and wear of dust in high temperature flue gas on waste heat boiler, avoid dust accumulation, blockage and fouling of waste heat boiler heat exchange surface, reduce the problems that high temperature flue gas requiring filtration and purification treatment such as converter or electric furnace steelmaking is always in the alternating cycle working condition of rapid heating and rapid cooling, ceramic fiber filter tube and waste heat boiler are subjected to great alternating thermal stress (thermal shock impact), and service life is short, and daily maintenance and repair workload is large.

[0005] To solve the above technical problems, the utility model adopts the technical scheme: a high temperature flue gas filtration purification device, characterized by comprising a dust removal shell and a pneumatic conveying device for conveying dust removal ash fixedly arranged below the dust removal shell;

[0006] The dust removal shell is provided with an air inlet and an air outlet, an air inlet tank is fixedly arranged in the dust removal shell and is connected with the air inlet, a plurality of axial cyclone sub-units are fixedly arranged in the air inlet tank, a blowing assembly is fixedly arranged above the air inlet tank, and an evaporator assembly is fixedly arranged below the air inlet tank.

[0007] Further, the air inlet tank comprises a top plate and a bottom plate, the axial cyclone sub-unit comprises a separation cavity fixedly arranged on the bottom plate and a gas guide assembly fixedly arranged on the top plate; the gas guide assembly is connected with the separation cavity and receives flue gas from the separation cavity.

[0008] Further, the width of the gas guide assembly is less than the width of the side of the separation cavity close to the gas guide assembly, the gas guide assembly and the separation cavity are located on the same axis, and the lower end of the gas guide assembly is embeddedly fixed in the upper surface of the separation cavity.

[0009] Further, the gas guide assembly comprises a gas guide sleeve and a ceramic fiber filter tube fixedly arranged in the gas guide sleeve, the gas guide sleeve is a hollow structure, and a notch is arranged at the upper end of the gas guide sleeve for embeddingly fixing the ceramic fiber filter tube; the ceramic fiber filter tube comprises a rigid framework, a plurality of air holes are arranged on the rigid framework, a ceramic fiber membrane is wrapped around the outer edge of the rigid framework, and a baffle is fixedly arranged on the upper section of the ceramic fiber filter tube.

[0010] Further, the top plate, the bottom plate, the gas guide sleeve and the ceramic fiber filter tube are all made of phase change heat storage materials, and the phase change heat storage materials are any one of metal and alloy phase change heat storage materials, molten salt phase change heat storage materials, carbonate phase change heat storage materials, metal-based composite phase change heat storage materials and ceramic-based composite phase change heat storage materials.

[0011] The alloy phase change heat storage materials include aluminum-silicon alloy phase change heat storage materials and copper alloy phase change heat storage materials, the molten salt phase change heat storage materials include fluorine salt and eutectic compounds thereof, such as LiF-NaF-KF eutectic salt, the carbonate phase change composite materials are, for example, Li2CO3-Na2CO3-K2CO3 eutectic salt, the metal-based composite phase change heat storage materials include, for example, aluminum-based / silicon carbide composite phase change heat storage materials, and the ceramic-based composite phase change heat storage materials include, for example, zirconia / inorganic salt composite phase change heat storage materials, which can be selected as needed.

[0012] Further, a uniform discharging device is fixedly arranged below the evaporator assembly, the uniform discharging device comprises a chute section fixedly arranged in the dust removal shell with equal intervals, a bottom supporting plate is fixedly arranged at a certain distance below the chute section in the interval area, and a nozzle is fixedly arranged at the midpoint of the bottom supporting plate.

[0013] Further, the evaporator assembly is fixedly arranged between the air inlet tank and the uniform discharging device, the evaporator assembly comprises a water inlet pipe and a water outlet pipe, and a plurality of circulating branches are fixedly arranged between the water inlet pipe and the water outlet pipe, and the two ends of the circulating branches are connected through the water inlet pipe and the water outlet pipe.

[0014] Further, the blowing assembly comprises a pulse blowing pipe and a pulse blowing electromagnetic valve fixedly arranged above the pulse blowing pipe, the input end of the pulse blowing pipe is communicated with the gas storage bag, and the output end faces the axial cyclone.

[0015] Further, the output end of the pulse blowing pipe is communicated with a pulse blowing Venturi tube, and the number of the pulse blowing Venturi tubes is not greater than the number of the axial cyclones.

[0016] Further, the gas storage bag and the pneumatic conveying device are supplied with nitrogen gas from a nitrogen gas source, and a manual valve for controlling the on-off of the input end of the gas storage bag is fixedly arranged above the input end.

[0017] Compared with the prior art, the beneficial effects of the utility model include:

[0018] 1) By arranging the air inlet tank based on the air inlet of the dust removal shell, and arranging the axial cyclone in the air inlet tank, the high-temperature flue gas is filtered, the coarse purification process of the high-temperature flue gas is realized, the blowing assembly arranged above the air inlet tank blows off the accumulated ash on the inner wall of the axial cyclone, the obtained dust is collected at the position of the evaporator assembly, and the evaporator assembly arranged therein completes the waste heat recovery of the hot ash, so that the high-temperature flue gas can be effectively purified, which provides favorable conditions for the subsequent waste heat recovery of the high-temperature flue gas, not only improves the waste heat recovery efficiency of the waste heat recovery device, but also effectively improves the working reliability and stability of the waste heat recovery device, greatly improves the service life of the waste heat recovery device and reduces the maintenance and repair workload, and effectively avoids the generation of dioxin by effectively reducing the ash content in the flue gas.

[0019] 2) By setting the axial cyclone in the intake box, the high-temperature flue gas is first removed from the vortex flow guide vane in the separation cavity to remove large particles of dust and sparks in the high-temperature flue gas, reduce the probability of gas explosion, and then the gas guide sleeve and the ceramic fiber filter tube are used to complete the further purification and filtration treatment of the high-temperature flue gas. The separation cavity can effectively reduce the workload of the ceramic fiber filter tube purification and filtration treatment and reduce the impact and wear of the ceramic fiber filter tube caused by dust in the high-temperature flue gas;

[0020] 3) By using the composite phase change heat storage material to form the intake box bottom plate, the separation cavity of each axial cyclone, the gas guide sleeve of each axial cyclone, the intake box top plate and the rigid skeleton of the ceramic fiber filter tube, the high-temperature flue gas purification and filtration device has the function of heat accumulator, and can store and release the heat energy of the high-temperature flue gas at the set temperature range according to the discontinuous characteristics of the electric furnace steelmaking or converter steelmaking production, so as to solve the contradiction between the supply and demand of heat energy in time and intensity, and basically ensure that the high-temperature flue gas filtration and purification device operates in a relatively constant temperature range;

[0021] 4) By setting the uniform unloading device below the evaporator assembly, the overall unloading of the hot ash in the entire ash bucket can be ensured, so that the temperature of the hot ash in each layer region of the hot ash storage bucket is balanced, which is beneficial to realize high-efficiency heat exchange; and the ash is unloaded from the bottom layer by layer during the ash unloading process, and the ash unloading rate is relatively balanced. BRIEF DESCRIPTION OF DRAWINGS

[0022] The disclosure of the present application will be described with reference to the accompanying drawings. It should be understood that the drawings are only for illustrative purposes, and are not intended to limit the scope of protection of the present application. In the drawings, the same reference numerals are used to refer to the same parts. Among them:

[0023] Figure 1 The cross-sectional structure of the high-temperature flue gas filtration and purification device is schematically shown;

[0024] Figure 2 The cross-sectional structure of the axial cyclone is schematically shown;

[0025] Figure 3 The cross-sectional structure of the gas guide sleeve is schematically shown;

[0026] Figure 4 The cross-sectional structure of the ceramic fiber filter tube is schematically shown;

[0027] Figure 5 The local enlarged structure of the uniform unloading device is schematically shown;

[0028] Figure 6 The combined application mode of multiple sets of flue gas filtration and purification devices is schematically shown.

[0029] The figure mark: 1 - dust removal shell, 2 - pneumatic conveying device, 3 - air inlet, 4 - air outlet, 5 - air inlet box, 51 - bottom plate, 52 - top plate, 53 - separation cavity, 54 - air guide sleeve, 55 - ceramic fiber filter tube, 56 - rigid framework, 57 - air hole, 58 - ceramic fiber membrane, 59 - vortex flow guide piece, 6 - blowing assembly, 61 - pulse blowing pipe, 62 - gas storage bag, 63 - pulse blowing electromagnetic valve, 64 - pulse blowing venturi, 7 - evaporator assembly, 71 - water inlet pipe, 72 - water outlet pipe, 73 - circulating branch, 8 - uniform unloading device, 81 - pipe section, 82 - bottom support plate, 83 - nozzle, 9 - nitrogen gas source. DETAILED DESCRIPTION

[0030] It is easy to understand that according to the technical scheme of the utility model, a person skilled in the art can propose a plurality of structure modes and implementation modes which can be replaced with each other without changing the essential spirit of the utility model. Therefore, the following specific embodiments and drawings are only exemplary description of the technical scheme of the utility model, and should not be regarded as the whole of the utility model or as the limitation or restriction of the technical scheme of the utility model.

[0031] Figure 1 The cross-sectional structure of the high-temperature flue gas filtration and purification device is schematically shown, and the high-temperature flue gas filtration and purification device comprises a dust removal shell 1 and a pneumatic conveying device 2 fixedly arranged below the dust removal shell 1 for conveying dust removal ash. Figure 1 The dust removal shell 1 is a hollow structure, and a reverse conical ash removal guide chute is fixedly arranged below the dust removal shell 1, the top of the reverse conical ash removal guide chute faces the pneumatic conveying device 2 and is communicated with the input end of the pneumatic conveying device 2, for sending the dust in the reverse conical ash removal guide chute into the pneumatic conveying device 2 and conveying the dust to the next processing equipment by the pneumatic conveying device 2.

[0032] The air inlet 3 and the air outlet 4 are arranged above the dust removal shell 1, the air inlet box 5 is fixedly arranged in the dust removal shell 1 and is connected with the air inlet 3, specifically, the air inlet box 5 is arranged based on the transverse cross-sectional shape of the dust removal shell 1, and the height of the air inlet box 5 is the same as the width of the air inlet 3, so that the air inlet box 5 is located at the same height as the air inlet 3 and the air inlet box 5 and the air inlet 3 are transversely connected, and the air outlet 4 is fixedly arranged above the dust removal shell 1 based on the upper side of the air inlet box 5.

[0033] A plurality of axial cyclones are fixedly arranged in the air inlet box 5, and the axial cyclones are used to complete the rough purification of the high-temperature flue gas, remove the large-particle high-temperature dust and sparks in the high-temperature flue gas, and reduce the probability of gas explosion. A blowing assembly 6 is fixedly arranged above the air inlet box 5, and the blowing assembly 6 is used to blow off the dust attached to the axial cyclones. An evaporator assembly 7 is fixedly arranged below the air inlet box 5, and the evaporator assembly 7 is used to complete the waste heat recovery process of the collected high-temperature flue gas.

[0034] Figure 2 The cross-sectional structure of the axial cyclone is schematically shown, and the axial cyclone will be described below in combination with Figure 1 and Figure 2 The assembly of the air inlet box 5 and the axial cyclone will be described in detail. The air inlet box 5 includes a top plate 52 and a bottom plate 51. The lower surface of the top plate 52 is located on the same horizontal line as the top end of the air inlet 3, and the upper surface of the bottom plate 51 is located on the same horizontal line as the lower end of the air inlet 3. The axial cyclone includes a separation cavity 53 fixedly arranged on the bottom plate 51 and a gas guide assembly fixedly arranged on the top plate 52. The gas guide assembly is connected through the separation cavity 53 and receives the flue gas from the separation cavity 53. The separation cavity 53 includes a first vertical section and a second vertical section. The first vertical section is in communication with the upper end of the bottom plate 51, and the second vertical section is in communication with the lower end of the bottom plate 51. The separation cavity 53 further includes an inclined section between the first vertical section and the second vertical section. One end of the inclined section is connected to the lower end edge of the first vertical section, and the other end of the inclined section is connected to the upper end edge of the second vertical section. The first vertical section, the second vertical section, and the inclined section are located on the same axis and form a reverse conical separation cavity 53.

[0035] The width of the gas guide assembly is smaller than the width of the first vertical section of the separation cavity 53. The gas guide assembly and the separation cavity 53 are located on the same axis, and the lower end of the gas guide assembly is embedded and fixed in the first vertical section of the separation cavity 53. Specifically, a plurality of vortex flow guide pieces 59 are fixedly arranged in the first vertical section based on the inner wall of the first vertical section. The gas guide assembly is embedded and fixed based on the other end of the vortex flow guide pieces 59, that is, the vortex flow guide pieces 59 are fixedly arranged based on the outer wall of the gas guide assembly extending into the first vertical section and the inner wall of the first vertical section.

[0036] The gas guide assembly includes a gas guide sleeve 54 and a ceramic fiber filter tube 55 fixedly arranged in the gas guide sleeve 54. Figure 3 The cross-sectional structure of the gas guide sleeve is schematically shown as follows. Figure 3As shown, the air guide sleeve 54 is a hollow through structure. A notch is provided at the upper end of the air guide sleeve 54 for the ceramic fiber filter tube 55 to be fitted and fixed. A convex ring is provided on its outer edge surface. The air guide sleeve 54 can be inserted from the top plate 52, and the upper end of the air guide sleeve 54 is limited to the top plate 52 of the air inlet box 5 by the convex ring provided on its outer edge surface.

[0037] Figure 4 The schematic diagram shows the cross-sectional structure of the ceramic fiber filter tube, such as Figure 4 As shown, the aforementioned ceramic fiber filter tube 55 includes a rigid frame 56, with a plurality of vent holes 57 opened on the rigid frame 56 along the width direction of the rigid frame 56, and a ceramic fiber membrane 58 covering the outer edge of the rigid frame 56. A baffle is fixedly installed at the upper end of the rigid frame 56. The rigid frame 56 can be directly inserted into the air guide sleeve 54 through the notch provided at the top of the air guide sleeve 54, and the upper section of the ceramic fiber filter tube 55 is limited in the upper section of the air guide sleeve 54 by the baffle, thereby fixing the ceramic fiber filter tube 55 in the air guide sleeve 54.

[0038] By installing ceramic fiber filter tubes 55 in the central air guide sleeves 54 of each axial cyclone, ultra-clean filtration of high-temperature flue gas is achieved, reaching the environmental standard outlet concentration of <5-10mg / Nm³. At the same time, it can also avoid the impact and wear of dust in high-temperature flue gas on the waste heat boiler, and prevent dust in high-temperature flue gas from accumulating, clogging and scaling on the heat exchange surface of the waste heat boiler, thereby improving the stability and safety of the entire high-temperature flue gas purification and filtration and full waste heat recovery system.

[0039] By incorporating a gas guide sleeve 54 and a vortex flow guide plate 59 in the separation chamber 53, large particles of high-temperature dust and sparks contained in the high-temperature flue gas can be effectively removed first, reducing the probability of gas explosion. At the same time, the high-temperature flue gas is coarsely purified, reducing the workload of the ceramic fiber filter tube 55 for purification and filtration, and reducing the impact and wear of dust in the high-temperature flue gas on the ceramic fiber filter tube 55.

[0040] By employing high-temperature composite phase change heat storage materials to construct the bottom plate 51 of the air inlet box 5, each axial air inlet cyclone separation chamber 53, each axial cyclone sub-center air guide sleeve 54, the top plate 52 of the air inlet box 5, and the rigid frame 56 of the ceramic fiber filter tube 55, the high-temperature flue gas purification and filtration device possesses the function of a heat storage device. It can store and release the heat energy of high-temperature flue gas in a set high temperature range (i.e., 650-950℃) to address the discontinuous characteristics of production such as electric arc furnace steelmaking or converter steelmaking, thereby resolving the contradiction between the supply and demand of heat energy in terms of time and intensity, and basically ensuring that the high-temperature flue gas filtration and purification device operates within a relatively constant high temperature range.

[0041] When high-temperature flue gas (T≥650-950℃) passes through the setting for filtering and purification treatment, the high-temperature composite phase-change heat accumulator arranged inside stores part of the heat in the high-temperature flue gas in it through its huge latent heat capacity; and when low-temperature flue gas (T≤450-550℃) passes through the setting for filtering and purification treatment, the high-temperature composite phase-change heat accumulator arranged inside will release the heat accumulated in it when the high-temperature flue gas passes through it, to heat the flue gas. In the whole operation process, the characteristics of the phase-change heat accumulator working at almost constant temperature near the phase-change temperature are fully utilized to reduce the temperature difference of heat release and absorption, which is more conducive to preventing thermal shock cracking of the phase-change heat storage medium and the ceramic filter material.

[0042] The hot ash storage bin area is below the aforementioned air inlet box 5, and the evaporator assembly 7 is fixedly arranged in the hot ash storage bin area to complete the waste heat recovery process of the hot ash. The heat exchange process between the evaporator assembly 7 and the hot ash is completed by introducing a coolant such as cooling water into the evaporator assembly 7. Uniform discharging device 8 is fixedly arranged below the hot ash storage bin area to ensure that the hot ash in the entire ash hopper is discharged evenly as a whole, thereby ensuring that the temperature of the hot ash in each layer of the hot ash storage hopper is balanced, which is conducive to achieving high-efficiency heat exchange.

[0043] Figure 5 The local enlarged structure of the uniform discharging device is schematically shown, and the following Figure 5 The uniform discharging device 8 is described in detail. The uniform discharging device 8 includes a chute section 81 fixedly arranged in the dust removal shell 1 with equal gaps, a bottom support plate 82 fixedly arranged below the chute section 81 at a certain distance in the gap area, and a nozzle 83 fixedly arranged at the midpoint of the bottom support plate 82. The aforementioned bottom support plate 82 can be adjusted according to the angle of repose of the hot ash (to ensure that the hot ash can reliably stop on the bottom support plate without automatically flowing down without external force). In production operation, according to the pre-set control program, the gas source of a certain discharging point is opened pulse respectively, and the hot ash is smoothly and evenly discharged from the hot ash storage bin layer by layer under the boosting action of the boosting gas source.

[0044] The aforementioned evaporator assembly 7 includes an inlet pipe 71 and an outlet pipe 72, and a plurality of circulating branches 73 are fixedly arranged between the inlet pipe 71 and the outlet pipe 72. The two ends of the circulating branch 73 are connected and penetrated with the inlet pipe 71 and the outlet pipe 72, respectively. The two ends of the inlet pipe 71 extend to the outside of the dust removal shell 1, which is convenient for the input and output of the coolant flowing in the evaporator assembly 7.

[0045] The following is specifically described for the injection assembly 6. The injection assembly 6 includes a pulse injection pipe 61 and a gas storage bag 62 for supplying gas to the pulse injection pipe 61. A pulse injection electromagnetic valve 63 is fixedly arranged between the pulse injection pipe 61 and the gas storage bag 62 to control the injection process. The gas storage bag 62 is in communication with the nitrogen gas source 9 of the pneumatic conveying device 2, that is, the nitrogen gas stored in the gas storage bag 62 is the same as the nitrogen gas of the pneumatic conveying device 2. A manual valve is arranged at the input end of the gas storage bag 62 to control the gas charging process of the gas storage bag 62. When the pulse injection pipe 61 is directly applied to the axial cyclone for the injection process, the number of the pulse injection pipe 61 needs to be the same as the number of the axial cyclone and the pulse injection pipe 61 needs to be located on the same axis as the axial cyclone. In other embodiments, a pulse injection Venturi tube 64 is connected to the output end of the pulse injection pipe 61, that is, the injection process is essentially completed through the pulse injection Venturi tube 64. In this process, the number of the pulse injection Venturi tube 64 only needs to be less than the number of the axial cyclone, and the number of the pulse injection pipe 61 can also be correspondingly reduced according to the number of the pulse injection Venturi tube 64, as long as the output end of the pulse injection Venturi tube 64 can cover the position of the axial cyclone.

[0046] Since the single set of high-temperature flue gas filtration and purification device has a relatively limited processing air volume capacity, multiple sets of high-temperature flue gas filtration and purification devices can be connected in parallel according to needs (as shown in Figure 6 The output flue gas is collected and then enters the next stage of processing equipment. The obtained dust is transported and combined by the pneumatic conveying device 2 of the single set of high-temperature flue gas filtration and purification device and then transported to the corresponding processing equipment. The nitrogen gas source 9 supplies gas to the gas storage bag 62 and the pneumatic conveying device 2 in the multiple sets of high-temperature flue gas filtration and purification devices.

[0047] The technical scope of the present application is not limited to the above description. Those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical concept of the present application, and these modifications and changes should be within the protection scope of the present application.

Claims

1. A high temperature flue gas filtration and purification device, characterized in that, The dust removal shell (1) and the pneumatic conveying device (2) fixedly arranged below the dust removal shell (1) for conveying dust removal ash are included. The air inlet (3) and the air outlet (4) are arranged above the dust removal shell (1), the air inlet tank (5) is fixedly arranged in the dust removal shell (1) and is connected through the air inlet (3), a plurality of axial cyclones are fixedly arranged in the air inlet tank (5), the blowing assembly (6) is fixedly arranged above the air inlet tank (5), and the evaporator assembly (7) is fixedly arranged below the air inlet tank (5).

2. The high temperature flue gas filtration and cleaning device according to claim 1, characterized in that, The air inlet tank (5) includes the top plate (52) and the bottom plate (51), the axial cyclone includes the separation cavity (53) fixedly arranged above the bottom plate (51) and the air guide assembly fixedly arranged above the top plate (52); the air guide assembly is connected through the separation cavity (53) and receives flue gas from the separation cavity (53).

3. The high temperature flue gas filtration and cleaning device according to claim 2, characterized in that, The width of the air guide assembly is less than the width of the separation cavity (53) near the air guide assembly, the air guide assembly and the separation cavity (53) are located on the same axis, and the lower end of the air guide assembly is embedded and fixed in the upper surface of the separation cavity (53).

4. The high temperature flue gas filtration and cleaning device, according to claim 3, characterized in that, The air guide assembly includes the air guide sleeve (54) and the ceramic fiber filter pipe (55) fixedly arranged in the air guide sleeve (54), the air guide sleeve (54) is a hollow through structure, the notch for embedding and fixing the ceramic fiber filter pipe (55) is arranged at the upper end of the air guide sleeve (54); the ceramic fiber filter pipe (55) includes the rigid framework (56), a plurality of air holes (57) are arranged on the rigid framework (56), the ceramic fiber membrane (58) is wrapped on the outer edge of the rigid framework (56), and the baffle is fixedly arranged at the upper end of the ceramic fiber filter pipe (55).

5. The high temperature flue gas filtration and cleaning device, according to claim 4, characterized in that, The top plate (52), the bottom plate (51), the air guide sleeve (54) and the ceramic fiber filter pipe (55) are all made of phase change heat storage materials, and the phase change heat storage materials are any one of metal and alloy phase change heat storage materials, molten salt phase change heat storage materials, carbonate phase change heat storage materials, metal-based composite phase change heat storage materials and ceramic-based composite phase change heat storage materials.

6. The high temperature flue gas filtration and cleaning device, according to claim 1, wherein, The uniform unloading device (8) is fixedly arranged below the evaporator assembly (7), the uniform unloading device (8) includes the chute section (81) fixedly arranged in the dust removal shell (1) with equal clearances, the bottom support plate (82) is fixedly arranged below the chute section (81) at a certain distance based on the clearance area, and the nozzle (83) is fixedly arranged at the midpoint of the bottom support plate (82).

7. The high temperature flue gas filtration and cleaning device, according to claim 1, wherein, The evaporator assembly (7) is fixedly arranged between the air inlet tank (5) and the uniform unloading device (8), the evaporator assembly (7) includes the water inlet pipe (71) and the water outlet pipe (72), a plurality of circulating branches (73) are fixedly arranged between the water inlet pipe (71) and the water outlet pipe (72), and the two ends of the circulating branch (73) are connected through the water inlet pipe (71) and the water outlet pipe (72) respectively.

8. The high temperature flue gas filtration and cleaning device, according to claim 1, wherein, The injection assembly (6) comprises a pulse injection pipe (61) and a pulse injection electromagnetic valve (63) fixedly arranged on the pulse injection pipe (61), an input end of the pulse injection pipe (61) is communicated with a gas storage bag (62), and an output end faces the axial cyclone.

9. The high temperature flue gas filtration and cleaning device, according to claim 8, characterized in that, The output end of the pulse injection pipe (61) is communicated with a pulse injection venturi (64), and the number of the pulse injection venturi (64) is not greater than the number of the axial cyclone.

10. The high temperature flue gas filtration and cleaning device, according to claim 8, characterized in that, The gas storage bag (62) and the pneumatic conveying device (2) are supplied with nitrogen gas from a nitrogen gas source (9), and a manual valve for controlling on-off is fixedly arranged on an input end of the gas storage bag (62).

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