High-temperature flue gas purification device

Abstract

The utility model relates to a high-temperature flue gas purification device which comprises a shell, a second heat storage rod, a filter pipe, a first heat storage rod, a separation device, a heat exchanger and a discharging device, a flue gas inlet for feeding flue gas, a gas outlet for discharging gas and a particulate matter outlet for discharging particulate matters are formed in the shell; the separation device is arranged in the shell and is close to the flue gas inlet; the second heat storage rod and the filter pipe are arranged in the shell side by side in the gas flowing direction; the inlet of the filter pipe is communicated with the shell; the outlet of the filter pipe is communicated with the gas outlet; the first heat storage rod is arranged in the filter pipe; the heat exchanger is arranged in the shell along the moving direction of the particulate matters; the discharging device is arranged at the particulate matter outlet and opens and closes the particulate matter outlet. The problems that in an existing scheme, a ceramic filter material is always in a quick heating and quick cooling alternate circulation working state, a ceramic filter material element is subjected to large thermal shock impact, and the service life is short are solved.

Description

Technical Field

[0001] The utility model relates to the field of flue gas purification equipment, in particular to a high-temperature flue gas purification device. Background Technique

[0002] The technical requirements for high-temperature flue gas purification are high, and it is far from meeting such harsh requirements by using simple gas-solid separation dust removal equipment. The technical requirements for high-temperature flue gas purification are to directly achieve dry dust removal and purification of gas under high-temperature conditions to maximize the utilization of the physical sensible heat of the gas and improve energy utilization efficiency.

[0003] According to the dust removal mechanism, gas dry dust removal technology can be roughly divided into inertial dust removal, electrostatic dust removal and filtration dust removal. Inertial dust collectors are resistant to high temperatures, but have low dust removal efficiency; although electrostatic dust collectors are suitable for high-temperature gas dust removal, the electrode life is short and the material stability is poor; although fiber bag filter dust collectors have high dust removal efficiency, they have poor high-temperature resistance and need to be cooled first before dust removal. These dry dust removal technologies all have certain limitations in the treatment of high-temperature flue gas.

[0004] By using ceramic filter materials, the high-temperature resistance of the flue gas purification device can be improved while maintaining high dust removal efficiency. When filtering ultra-high-temperature flue gas, the ceramic filter materials will always be in a working state of alternating rapid heating and rapid cooling, and the ceramic filter elements will be subjected to large thermal shock impacts. Under the action of thermal shock impacts, the service life of the ceramic filter elements is short, and the daily maintenance and repair workload is very large.

[0005] It should be noted that the information disclosed in the above background technique section is only used to strengthen the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to those of ordinary skill in the art. Content of the Utility Model

[0006] Aiming at the shortcomings of the above-mentioned prior art, the purpose of the present utility model is to provide a high-temperature flue gas purification device to solve the problems in the prior art that the ceramic filter materials will always be in a working state of alternating rapid heating and rapid cooling, the ceramic filter elements are subjected to large thermal shock impacts, the service life is short, and the daily maintenance and repair workload is very large.

[0007] To achieve the above purpose, the technical solution of the present utility model is as follows:

[0008] A high-temperature flue gas purification device;

[0009] It includes: a shell, a second heat storage rod for storing the heat of the gas, a filter tube for filtering the gas, a first heat storage rod for storing the heat of the gas in the filter tube, a separation device for separating the flue gas, a heat exchanger for cooling the particulate matter, and a discharging device for discharging the particulate matter;

[0010] A flue gas inlet for admitting flue gas, a gas outlet for discharging gas, and a particulate matter outlet for discharging particulate matter are formed on the housing.

[0011] The separation device is arranged in the housing near the flue gas inlet; the second heat storage rod and the filter tube are arranged in parallel in the housing along the gas flow direction; the inlet of the filter tube communicates with the inside of the housing, and the outlet of the filter tube communicates with the gas outlet; the first heat storage rod is arranged in the filter tube; the heat exchanger is arranged in the housing along the moving direction of the particulate matter; the discharging device is arranged at the particulate matter outlet and opens and closes the particulate matter outlet.

[0012] A further technical solution is that a blowing device is further included; the blowing device includes: an air bag for storing cleaning gas, a pipeline communicating with the air bag, and an electromagnetic pulse valve for opening and closing the pipeline; the pipeline extends into the housing and extends towards the outlet of the filter tube; the electromagnetic pulse valve is arranged on the pipeline.

[0013] A further technical solution is that a tube sheet is arranged in the housing; the filter tubes are arranged in parallel on the tube sheet; a venturi tube is arranged in the outlet of the filter tube; one end of the venturi tube extends along the end face of the outlet of the filter tube; a pressing plate is arranged on the tube sheet; the pressing plate presses one end of the venturi tube.

[0014] The tube sheet is provided with sleeves arranged in parallel; the sleeves are sleeved on the filter tubes.

[0015] A further technical solution is that the other end of the venturi tube is fixedly connected to the second heat storage rod; a guiding member is arranged at the other end of the venturi tube; the guiding member gradually extends outwards along the flowing direction of the cleaning gas.

[0016] A further technical solution is that a first valve body, a gas distribution ring pipe arranged around the housing, and a blowing pipe for spraying inert gas are further included; the first valve body opens and closes an inert gas source; one end of the gas distribution ring pipe communicates with the blowing pipe; the other end of the gas distribution ring pipe communicates with the inert gas source; the blowing pipe extends into the housing near the separation device.

[0017] A further technical solution is that a uniform discharging pipeline and a second valve body for opening and closing a discharging gas source are further included; the second valve body is arranged on the uniform discharging pipeline; one end of the uniform discharging pipeline communicates with the discharging gas source; the other end of the uniform discharging pipeline extends into the housing and faces the moving direction of the particulate matter.

[0018] A further technical solution is that it further includes a discharge plate disposed inside the housing; a space for storing particulate matter is formed on the discharge plate; a notch is formed on the discharge plate; the notch communicates with the space; a discharge air pipe is disposed on the discharge plate; the outlet of the discharge air pipe extends into the space; a flow guide member is disposed at the outlet of the discharge air pipe; the flow guide member extends in the direction of the notch.

[0019] A further technical solution is that the separation device includes a first section and a second section that are interconnected; the first section gradually extends outward along the gas flow direction; uniformly distributed holes are arranged in parallel on the second section; the uniformly distributed holes communicate with the inside of the first section.

[0020] Compared with the prior art, the beneficial technical effects of the present utility model are as follows: (1) The second heat storage rod and the first heat storage rod complete the heat storage and release of the gas twice, reducing the pressure of the single heat storage and release of the second heat storage rod and the first heat storage rod; the second heat storage rod completes the first heat storage and release of the gas, completing the first temperature control of the gas, avoiding the high-temperature gas from contacting the filter tube, and prolonging the service life of the filter tube; the first heat storage rod completes the second heat storage and release of the gas, completing the second temperature control of the gas, and avoiding the gas from maintaining a high temperature in the filter tube; at the same time, the heat storage and release of the first heat storage rod maintain a constant temperature in the filter tube, avoiding a large temperature difference in the filter tube;

[0021] Through the second heat storage rod and the first heat storage rod, the high-temperature flue gas purification device operates within a constant temperature range, reducing the thermal shock impact on the filter tube, ensuring the service life and reliable operation of the high-temperature flue gas purification device.

[0022] (2) When the filter tube filters the gas, the electromagnetic pulse valve closes the pipeline; after the filter tube filters out more particulate matter, the particulate matter adhering to the filter tube will affect the filtering ability of the filter tube; at this time, the electromagnetic pulse valve opens the pipeline, and the cleaning gas stored in the air bag is sprayed into the filter tube through the pipeline, and the particulate matter adhering to the filter tube falls off, and the filtering ability of the filter tube is restored.

[0023] (3) The guide member is threadedly connected to the second heat storage rod; when the cleaning gas flows downward along the venturi tube, the cleaning gas is guided by the guide member, avoiding the cleaning gas from contacting the position where the second heat storage rod is connected to the other end of the venturi tube, ensuring the smooth flow of the cleaning gas, and completing the cleaning of the particulate matter on the filter tube.

[0024] (4) After the particulate matter is separated, it will fall, and after the particulate matter adhering to the filter tube is cleaned, it will fall. The particulate matter accumulates at the lower end inside the housing after falling, and the discharge device can discharge the particulate matter after being opened; there is a situation where the particulate matter cannot be discharged after accumulation. The particulate matter can be dispersed through the uniform discharge pipeline. After the second valve body is opened, the uniform discharge pipeline sprays the discharge gas, and the discharge gas contacts the particulate matter, dispersing the particulate matter, which is convenient for the discharge of the particulate matter.

[0025] (5) Particulates accumulate above the discharge plate and fall into the space. The discharge gas blown out by the uniform discharge pipe flows upward. The discharge gas enters the discharge gas pipe from the lower end of the discharge gas pipe and is ejected from the upper end of the discharge gas pipe. The flow guide changes the flow direction of the discharge gas, and the discharge gas flows from the lower end of the space towards the notch. There are particulates accumulated in the space, and the discharge gas discharges the particulates from the notch during the flowing process. The particulates in the space decrease, and the particulates above the discharge plate continue to fall into the space. Driven by the discharge gas, the particulates in the space are evenly scattered below the discharge plate, and the particulates continue to fall and are evenly dispersed at the lower end inside the housing. Description of the Drawings

[0026] Figure 1 Shows a schematic diagram of the high-temperature flue gas purification device according to the first embodiment of the present invention.

[0027] Figure 2 Shows Figure 1 An enlarged view of part A in

[0028] Figure 3 Shows Figure 1 An enlarged view of part B in

[0029] Reference numerals in the drawings: 1, housing; 11, second regenerative rod; 12, flue gas inlet; 13, gas outlet; 14, particulate outlet; 15, tube sheet; 151, screw; 152, washer; 153, nut; 16, pressing plate; 17, sleeve; 2, filter tube; 21, venturi tube; 22, guiding member; 221, conical surface; 3, separation device; 31, first section; 32, second section; 33, evenly distributed holes; 4, heat exchanger; 5, discharging device; 6, blowing device; 61, air bag; 62, pipeline; 63, electromagnetic pulse valve; 7, uniform discharging pipe; 71, second valve body; 72, discharge plate; 73, space; 74, notch; 75, discharge gas pipe; 76, flow guide; 8, first regenerative rod; 91, gas distribution ring pipe; 92, injection pipe; 93, first valve body. Detailed Description of the Invention

[0030] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the following further details the device proposed by the present utility model in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present utility model will be clearer. It should be noted that the accompanying drawings are in a very simplified form and all use non-precise scales, only for conveniently and clearly assisting in explaining the objectives of the embodiments of the present utility model. In order to make the objectives, features and advantages of the present utility model more obvious and understandable, please refer to the accompanying drawings. It should be noted that the structures, scales, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have technical substance significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the objectives that can be achieved, should still fall within the scope covered by the technical content disclosed by the present utility model.

[0031] Figure 1 The schematic diagram of the high-temperature flue gas purification device according to the first embodiment of the present utility model is shown. Figure 2 Shows Figure 1 The enlarged view at position A in Figure 1 - Figure 2 As shown, the present utility model discloses a high-temperature flue gas purification device.

[0032] The high-temperature flue gas purification device includes: a housing 1 arranged vertically, a second heat storage rod 11 for storing the heat of the gas, a filter tube 2 for filtering the gas, a first heat storage rod 8 for storing the heat of the gas in the filter tube 2, a separation device 3 for separating the flue gas, a heat exchanger 4 for cooling the particulate matter, and a discharging device 5 for discharging the particulate matter.

[0033] A flue gas inlet 12 is formed at the middle position of the housing 1 to introduce the flue gas. A gas outlet 13 is formed at the upper end of the housing 1 to discharge the gas. A particulate matter outlet 14 is formed at the lower end of the housing 1 to discharge the particulate matter.

[0034] The outer surface of the housing 1 is wrapped with a heat-insulating cotton and a guard plate layer.

[0035] The separation device 3 is arranged in the housing 1 near the flue gas inlet 12. The lower end of the separation device 3 is the inlet, and the flue gas is separated into gas and particulate matter after passing through the separation device 3. The gas flows upward in the housing 1, and the particulate matter drops downward in the housing 1.

[0036] The second heat storage rod 11 and the filter tube 2 are arranged side by side in the housing 1 along the gas flow direction. The second heat storage rod 11 is located below the filter tube 2. The inlet of the filter tube 2 is communicated with the inside of the housing 1, and the outlet of the filter tube 2 is communicated with the gas outlet 13. The first heat storage rod 8 is arranged in the filter tube 2.

[0037] During the upward flow of the gas, it first contacts the second heat storage rod 11 for heat storage and release. Then it continues to flow upward and passes through the filter tube 2 to filter the particulate matter in the gas. After that, it enters the filter tube 2 and contacts the first heat storage rod 8 for heat storage and release. Finally, after discharging from the filter tube 2, it is discharged through the gas outlet 13.

[0038] The heat exchanger 4 is arranged in the housing 1 along the moving direction of the particulate matter. The particulate matter is cooled when it contacts the heat exchanger 4. According to the temperature condition of the particulate matter, the number and model of the heat exchanger 4 can be adjusted.

[0039] After the particulate matter is cooled, it accumulates at the lower end in the housing 1. After the discharging device 5 opens the particulate matter outlet 14, the particulate matter is discharged through the particulate matter outlet 14. Exemplarily, the discharging device 5 is a pneumatic conveying device.

[0040] The second heat storage rod 11 and the first heat storage rod 8 complete the heat storage and release of the gas twice, reducing the pressure of the single heat storage and release of the second heat storage rod 11 and the first heat storage rod 8. The first heat storage and release of the gas is completed by the second heat storage rod 11, and the first temperature control of the gas is completed, avoiding the contact of the gas at a higher temperature with the filter tube 2 and prolonging the service life of the filter tube 2. The second heat storage and release of the gas is completed by the first heat storage rod 8, and the second temperature control of the gas is completed, avoiding the gas maintaining a higher temperature in the filter tube 2. At the same time, the heat storage and release of the first heat storage rod 8 maintains the filter tube 2 at a constant temperature, avoiding a large temperature difference in the filter tube 2.

[0041] Through the second heat storage rod 11 and the first heat storage rod 8, the high-temperature flue gas purification device operates within a constant temperature range, reducing the thermal shock impact on the filter tube 2 and ensuring the service life and reliable operation of the high-temperature flue gas purification device.

[0042] The high-temperature flue gas purification device further includes a blowing device 6. The blowing device 6 includes: an air bag 61 for storing cleaning gas, a pipeline 62 communicating with the air bag 61, and an electromagnetic pulse valve 63 for opening and closing the pipeline 62. The pipeline 62 extends into the housing 1 and extends towards the outlet of the filter tube 2. The inlet of the pipeline 62 communicates with the air bag 61, and the pipeline 62 extends towards the outlet of the filter tube 2. The electromagnetic pulse valve 63 is arranged on the pipeline 62.

[0043] When the filter tube 2 filters the gas, the electromagnetic pulse valve 63 closes the pipeline 62. After the filter tube 2 filters out more particulate matter, the particulate matter adhering to the filter tube 2 will affect the filtering ability of the filter tube 2. At this time, the electromagnetic pulse valve 63 opens the pipeline 62, and the cleaning gas stored in the air bag 61 is sprayed into the filter tube 2 through the pipeline 62, and the particulate matter adhering to the filter tube 2 drops off, and the filtering ability of the filter tube 2 is restored.

[0044] A tube sheet 15 is horizontally welded inside the housing 1. Filter tubes 2 are arranged side by side on the tube sheet 15. Inside the outlet of the filter tube 2, a Venturi tube 21 is arranged in the up and down direction. The middle position of the Venturi tube 21 is a straight tube, and the upper and lower ends of the Venturi tube 21 gradually extend outward.

[0045] The upper end of the Venturi tube 21 extends horizontally along the end face of the outlet of the filter tube 2. A pressing plate 16 is arranged on the tube sheet 15. A screw rod 151 is vertically welded on the upper surface of the tube sheet 15. The upper end of the screw rod 151 passes through the pressing plate 16. A washer 152 is sleeved on the screw rod 151, and a nut 153 is threadedly connected to the screw rod 151. The washer 152 and the nut 153 are located above the pressing plate 16. After tightening the nut 153, the washer 152 and the nut 153 press the pressing plate 16, and the pressing plate 16 presses the extension of the upper end of the Venturi tube 21.

[0046] Bushing tubes 17 are arranged side by side on the tube sheet 15. The bushing tubes 17 are arranged in the up and down direction. The bushing tubes 17 are sleeved on the filter tubes 2. The outer surface of the bushing tubes 17 contacts the tube sheet 15. The inner surface of the bushing tubes 17 contacts the outer surface of the filter tubes 2.

[0047] By adjusting the nut 153, the pressing plate 16 can horizontally press down the Venturi tube 21, the filter tube 2 and the bushing tube 17 in sequence, firmly fix the filter tube 2 on the tube sheet 15, and firmly fix the Venturi tube 21 inside the filter tube 2.

[0048] The second heat storage rod 11 is fixedly connected to the other end of the Venturi tube 21 through a nut. The second heat storage rod 11 passes through the other end of the Venturi tube 21, thread the nut on the second heat storage rod 11, and after tightening the nut, fix the second heat storage rod 11 at the other end of the Venturi tube 21.

[0049] A guide member 22 is arranged at the other end of the Venturi tube 21. The guide member 22 gradually extends outward along the flow direction of the cleaning gas to form a conical surface 221.

[0050] The guide member 22 is threadedly connected to the second heat storage rod 11. When the cleaning gas flows downward along the Venturi tube 21, the cleaning gas is guided by the guide member 22, avoiding the cleaning gas contacting the position where the second heat storage rod 11 is connected to the other end of the Venturi tube 21, ensuring the smooth flow of the cleaning gas, and completing the cleaning of the particulate matter on the filter tube 2.

[0051] The high-temperature flue gas purification device further includes a first valve body 93, a gas distribution ring pipe 91 arranged around the housing 1, and a blowing pipe 92 for ejecting inert gas. The other end of the gas distribution ring pipe 91 is communicated with an inert gas source. The first valve body 93 is arranged at the other end of the gas distribution ring pipe 91, and the first valve body 93 opens and closes the inert gas source.

[0052] One end of the gas distribution ring pipe 91 is communicated with the blowing pipe 92. The blowing pipe 92 is connected in parallel to one end of the gas distribution ring pipe 91, and the blowing pipe 92 extends into the housing 1 near the separation device 3.

[0053] After the first valve body 93 is opened, the inert gas passes through the gas distribution ring pipe 91 and is ejected through the injection pipe 92. The inert gas is concentrated at a position in the housing 1 close to the separation device 3. The inert gas forms a vortex area at a position in the housing 1 close to the separation device 3. When the flue gas is separated into gas and particulate matter by the separation device 3, the vortex area plays an explosion-proof role.

[0054] The separation device 3 includes a first stage 31 and a second stage 32 that are interconnected. The first stage 31 gradually extends outward along the gas flow direction. Uniform holes 33 are arranged in parallel on the outer surface of the second stage 32, and the uniform holes 33 communicate with the inside of the first stage 31. Exemplarily, the diameter of the uniform holes 33 is: 30 - 45 mm. Exemplarily, the opening ratio of the uniform holes 33 on the second stage 32 is: 45 - 60%.

[0055] After the flue gas enters the housing 1, after the flue gas passes through the uniform holes 33, the gas enters the first stage 31 and the second stage 32, and the particulate matter is isolated and falls. At this time, the particulate matter has a certain temperature, and it is necessary to cool the particulate matter and then discharge it through the discharging device 5.

[0056] Exemplarily, the heat exchanger 4 is a high-temperature and high-pressure vaporization tube device and / or a forced circulation heat exchanger with a fin structure. The heat exchanger 4 can be a high-temperature and high-pressure vaporization tube device or a forced circulation heat exchanger with a fin structure alone, or can also be a high-temperature and high-pressure vaporization tube device and a forced circulation heat exchanger with a fin structure at the same time. In this application, the heat exchanger 4 adopts a high-temperature and high-pressure vaporization tube device and a forced circulation heat exchanger with a fin structure to cool the particulate matter at the same time.

[0057] When the temperature of the particulate matter is < 750 °C and ≥ 350 °C, the high-temperature and high-pressure vaporization tube device cools the temperature of the particulate matter. When the temperature of the particulate matter is < 350 °C and ≥ 150 °C, the forced circulation heat exchanger with a fin structure cools the temperature of the particulate matter.

[0058] The high-temperature flue gas purification device further includes a uniform discharging pipeline 7 and a second valve body 71 for opening and closing the discharging gas source. The second valve body 71 is arranged on the uniform discharging pipeline 7. One end of the uniform discharging pipeline 7 communicates with the discharging gas source. The other end of the uniform discharging pipeline 7 extends into the lower end of the housing 1 close to the discharging device 5 and faces the moving direction of the particulate matter. The other end of the uniform discharging pipeline 7 is located above the discharging device 5.

[0059] After the particulate matter is separated, it will fall. The particulate matter attached to the filter tube 2 will fall after being cleaned. The particulate matter accumulates at the lower end inside the housing 1 after falling. After the discharging device 5 is opened, the particulate matter can be discharged. When the particulate matter accumulates and cannot be discharged, the particulate matter can be dispersed through the uniform discharging pipeline 7. After the second valve body 71 is opened, the uniform discharging pipeline 7 ejects the discharging gas. The discharging gas contacts the particulate matter and disperses the particulate matter, facilitating the discharge of the particulate matter.

[0060] Figure 3 shows Figure 1 the enlarged view of part B in Figure 1 - Figure 3 As shown, the high-temperature flue gas purification device further includes a discharging plate 72 horizontally arranged inside the housing 1. A space 73 for storing particulate matter is formed on the discharging plate 72, and a notch 74 is formed on the discharging plate 72. The notch 74 communicates with the left and right ends of the space 73. The upper end of the space 73 communicates with the upper part of the discharging plate 72 inside the housing 1. The lower end of the space 73 communicates with the lower part of the discharging plate 72 inside the housing 1 through the notch 74.

[0061] The discharging air pipe 75 is arranged downward on the discharging plate 72. The upper end of the discharging air pipe 75 is the discharging air pipe 75 outlet, and the lower end of the discharging air pipe 75 is the discharging air pipe 75 inlet. The discharging air pipe 75 outlet extends into the space 73. A flow guiding member 76 is arranged at the discharging air pipe 75 outlet. The flow guiding member 76 extends towards the notch 74.

[0062] The particulate matter accumulates above the discharging plate 72 and falls into the space 73. The discharging gas blown out by the uniform discharging pipeline 7 flows upward. The discharging gas enters the discharging air pipe 75 from the lower end of the discharging air pipe 75 and is ejected from the upper end of the discharging air pipe 75. The flow guiding member 76 changes the flow direction of the discharging gas, and the discharging gas flows along the lower end of the space 73 towards the notch 74. There is particulate matter accumulated in the space 73, and the discharging gas discharges the particulate matter from the notch 74 during the flowing process. The particulate matter in the space 73 decreases, and the particulate matter above the discharging plate 72 continues to fall into the space 73. Driven by the discharging gas, the particulate matter in the space 73 is evenly scattered below the discharging plate 72, and the particulate matter continues to fall and is evenly dispersed at the lower end inside the housing 1.

[0063] In this application, the cleaning gas, the inert gas, and the discharging gas all adopt nitrogen, and the cleaning gas source, the inert gas source, and the discharging gas source are all nitrogen sources. The blowing device 6, the gas distribution ring pipe 91, the uniform discharging pipeline 7, and the discharging device 5 are connected to the same nitrogen source.

[0064] Second Embodiment:

[0065] The high-temperature flue gas purification method includes the following steps:

[0066] Separation step: The flue gas enters the housing 1 through the flue gas inlet 12. The inert gas is ejected from the injection pipe 92 to form a vortex region near the separation device 3. After passing through the vortex region, the flue gas is separated into gas and particulate matter by the separation device 3.

[0067] The flue gas passes through the separation device 3 for the first separation of gas and particulate matter, and the formation of a vortex region by the inert gas plays an explosion-proof role.

[0068] Regenerative heat storage step: The gas sequentially passes through the second heat storage rod 11, the filter tube 2, and the first heat storage rod 8 and then is discharged from the gas outlet 13 out of the housing 1. The second heat storage rod 11 and the first heat storage rod 8 store the heat of the gas. The filter tube 2 filters the particulate matter in the gas.

[0069] Heat release step: The second heat storage rod 11 and the first heat storage rod 8 release heat to heat the gas;

[0070] When the flue gas is high-temperature flue gas, the flue gas temperature ≥ 850 °C, and the second heat storage rod 11 and the first heat storage rod 8 store the heat of the gas. When the flue gas is low-temperature flue gas, the flue gas temperature ≤ 650 °C, and the second heat storage rod 11 and the first heat storage rod 8 release heat to the gas.

[0071] During the operation of the high-temperature flue gas purification device, the second heat storage rod 11 and the first heat storage rod 8 are fully utilized to reduce the temperature difference of the gas and prevent the occurrence of thermal shock cracking problems of the filter tube 2. Exemplarily, the material of the filter tube 2 is a variety of ceramic fiber composite materials with vanadium pentoxide and titanium dioxide catalyst particles attached to the surface. The filter tube 2 can effectively and ultra-finely filter the particulate matter in the flue gas, and can also decompose and remove harmful substances such as dioxins / furans contained in the flue gas.

[0072] The second heat storage rod 11 and the first heat storage rod 8 are filled with a composite phase change heat storage material in a cylindrical outer shell, and then the second heat storage rod 11 and the first heat storage rod 8 are evacuated by a pumping head. The composite phase change heat storage material is filled with a porous medium, and the porosity of the porous medium gradually decreases along the heat flow direction. The porous medium is a foam metal or foam carbon with a high thermal conductivity. The outer surfaces of the second heat storage rod 11 and the first heat storage rod 8 are sprayed with a special alloy coating by supersonic arc spraying technology to achieve surface strengthening treatment.

[0073] Particulate matter recovery step: After the particulate matter is cooled by the heat exchanger 4, the particulate matter accumulates at the bottom of the housing 1; the discharging device 5 discharges the particulate matter.

[0074] In this application, the heat exchanger 4 adopts a high-temperature and high-pressure vaporization tube device and a forced circulation heat exchanger with a fin structure to cool the particulate matter at the same time.

[0075] When the particulate matter temperature is < 750°C and ≥ 350°C, the high-temperature and high-pressure vaporization tube device cools down the particulate matter temperature. When the particulate matter temperature is < 350°C and ≥ 150°C, the finned forced circulation heat exchanger cools down the particulate matter temperature.

[0076] When the filtering effect of the filter tube 2 decreases, the pipeline 62 ejects cleaning gas, and the particulate matter attached to the filter tube 2 drops off.

[0077] The pipeline 62 ejects cleaning gas. The cleaning gas enters the filter tube 2 from above the filter tube 2 and sprays out from the inside of the filter tube 2 to the outer periphery of the filter tube 2. During the spraying process, the particulate matter attached to the filter tube 2 is driven to drop off.

[0078] When there is a large amount of particulate matter accumulated at the bottom of the housing 1, the uniform discharging pipeline 7 ejects discharging gas to stir the particulate matter. After the particulate matter is loosened, it is convenient for the discharging device 5 to discharge the particulate matter.

[0079] The particulate matter accumulates on the discharging plate 72. The particulate matter is placed in the space 73. The discharging gas ejected by the uniform discharging pipeline 7 flows upward. The discharging gas enters the discharging gas pipe 75. The flow guiding member 76 changes the flow direction of the discharging gas and discharges the particulate matter in the space 73 through the notch 74. The discharging gas drives the particulate matter to be discharged from the notch 74 along the lower end in the space 73, so that the particulate matter falls in a uniformly dispersed manner.

[0080] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0081] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A high-temperature flue gas purification device, characterized in that: include: It comprises a housing (1), a second heat storage rod (11) for storing gas heat, a filter tube (2) for filtering gas, a first heat storage rod (8) for storing gas heat in the filter tube (2), a separation device (3) for separating smoke, a heat exchanger (4) for cooling particulate matter, and a discharge device (5) for discharging particulate matter; The housing (1) is formed with a smoke inlet (12) for smoke to enter, a gas outlet (13) for exhausting gas, and a particle outlet (14) for exhausting particle matter; The separation device (3) is arranged in the shell (1) at a position close to the smoke inlet (12); the second heat storage rod (11) and the filter tube (2) are arranged in parallel in the shell (1) along the gas flow direction; the inlet of the filter tube (2) is connected to the shell (1), and the outlet of the filter tube (2) is connected to the gas outlet (13); the first heat storage rod (8) is arranged in the filter tube (2); the heat exchanger (4) is arranged in the shell (1) along the particle movement direction; the discharge device (5) is arranged at the particle outlet (14) and opens and closes the particle outlet (14).

2. The high-temperature flue gas purification device according to claim 1, characterized in that: The invention also comprises an air blowing device (6); the air blowing device (6) comprises: an air bag (61) for storing cleaning gas, a pipe (62) connected to the air bag (61), and an electromagnetic pulse valve (63) for opening and closing the pipe (62); the pipe (62) extends into the housing (1) and toward the outlet of the filter tube (2); the electromagnetic pulse valve (63) is arranged on the pipe (62).

3. The high-temperature flue gas purification device according to claim 2, characterized in that: A tube sheet (15) is arranged in the shell (1); the filter tubes (2) are arranged in parallel on the tube sheet (15); a venturi tube (21) is arranged in the outlet of the filter tube (2); one end of the venturi tube (21) extends along the end surface of the outlet of the filter tube (2); a pressure plate (16) is arranged on the tube sheet (15); the pressure plate (16) presses one end of the venturi tube (21); The tube sheet (15) is provided with sleeves (17) in parallel; the sleeves (17) are sleeved on the filter tube (2).

4. The high-temperature flue gas purification device according to claim 3, characterized in that: The other end of the venturi tube (21) is fixedly connected to the second heat storage rod (11); a guide member (22) is provided at the other end of the venturi tube (21); and the guide member (22) gradually extends outwards along the flow direction of the cleaning gas.

5. The high-temperature flue gas purification device according to claim 2, characterized in that: It also includes a first valve body (93), a gas separation ring tube (91) arranged around the shell (1), and a blow pipe (92) for spraying inert gas; the first valve body (93) opens and closes the inert gas source; one end of the gas separation ring tube (91) is connected to the blow pipe (92); the other end of the gas separation ring tube (91) is connected to the inert gas source; the blow pipe (92) extends into the shell (1) to a position close to the separation device (3).

6. The high-temperature flue gas purification device according to claim 2, characterized in that: It also comprises a uniform discharge pipe (7) and a second valve body (71) for opening and closing a discharge gas source; the second valve body (71) is arranged on the uniform discharge pipe (7); one end of the uniform discharge pipe (7) is connected to the discharge gas source; the other end of the uniform discharge pipe (7) extends into the shell (1) and faces the direction in which the particles move in.

7. The high-temperature flue gas purification device according to claim 6, characterized in that: It also includes a discharge plate (72) arranged in the shell (1); a space (73) for storing particulate matter is formed on the discharge plate (72); a notch (74) is formed on the discharge plate (72); the notch (74) is connected to the space (73); a discharge air pipe (75) is arranged on the discharge plate (72); the outlet of the discharge air pipe (75) extends into the space (73); a guide member (76) is arranged at the outlet of the discharge air pipe (75); and the guide member (76) extends in the direction of the notch (74).

8. The high-temperature flue gas purification device according to claim 1, characterized in that: The separation device (3) comprises a first section (31) and a second section (32) which are connected to each other; the first section (31) gradually extends outward along the gas flow direction; the second section (32) is provided with evenly distributed holes (33) in parallel; the evenly distributed holes (33) are connected to the first section (31).

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