Ultralow-temperature flue gas purification device and flue gas purification system

Abstract

The invention discloses an ultralow-temperature flue gas purification device and a flue gas purification system, and relates to the technical field of flue gas treatment. The ultralow-temperature flue gas purification device comprises a tower body, a plurality of unit cylinders, a first grating and a hoisting assembly, an openable tower cover is arranged at the top of the tower body, and a first opening and a second opening through which flue gas passes are formed in the side wall and the bottom of the tower body; the unit barrels are sequentially and movably arranged in the inner cavity of the tower body in the vertical direction and located between the first opening and the second opening, the first grating is detachably arranged in the inner cavity of the unit barrels, the unit barrels and the first grating define a filler cavity used for containing granular filler, and the hoisting assembly is arranged corresponding to the unit barrels. The hoisting assemblies are used for being connected with hoisting equipment so as to take out the corresponding unit barrels from the top of the tower body. According to the ultralow-temperature flue gas purification device, the consumption of the filler can be reduced, the granular filler can be conveniently replaced layer by layer, the utilization efficiency of the filler is improved, and the flue gas purification cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas treatment, and in particular to an ultra-low temperature flue gas purification device and a flue gas purification system. Background Art

[0002] Biomass is a high-quality fuel with zero carbon emissions due to its renewable nature and low sulfur content. The thermochemical utilization of biomass includes gasification and combustion, and the pollutants produced include H2S, nitrogen oxides (NO x ), SO2, etc. The output and distribution characteristics of biomass raw materials determine that the utilization of biomass should be distributed. The scale of gasification or combustion equipment is relatively small, and the corresponding flue gas treatment equipment is also small. Therefore, when purifying flue gas, ultra-low temperature (≤150℃) flue gas purification equipment is more suitable.

[0003] In the related technologies, the denitrification operation in the ultra-low temperature flue gas purification process is represented by the integrated technology of carbon-based flue gas desulfurization and denitrification. The reactor can adopt a moving bed reactor and a fixed bed reactor. The filler in the reactor is a granular carbon material, which has a larger specific surface area than other formed catalysts, has the advantages of no wastewater and hazardous waste generation, low operating temperature and energy saving. However, when using a moving bed reactor, there are problems of large carbon material loss and high operating cost; when using a fixed bed reactor, the granular filler is simply accumulated in the reactor, which is not only difficult to replace, but also more likely to cause waste of resources during the replacement of the entire bed. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] To this end, an embodiment of the present invention proposes an ultra-low temperature flue gas purification device, which can reduce the consumption of fillers, facilitate the layer-by-layer replacement of granular fillers, improve the utilization efficiency of fillers, and reduce the cost of flue gas purification.

[0006] The embodiment of the present invention also provides a flue gas purification system.

[0007] The ultra-low temperature flue gas purification device according to the embodiment of the present invention comprises:

[0008] A tower body, wherein an openable tower cover is provided on the top of the tower body, a first opening for smoke to pass through is provided on the side wall of the tower body, and a second opening for smoke to pass through is provided on the bottom of the tower body;

[0009] A plurality of unit tubes, the plurality of unit tubes are movably arranged in sequence in the inner cavity of the tower body along the up-down direction and are located between the first port and the second port, the unit tubes are sealed with the inner wall of the tower body, the two ends of the unit tubes are respectively provided with a first connecting portion and a second connecting portion, and the first connecting portion of the unit tube is blocked and matched with the second connecting portion of the adjacent unit tube in the up-down direction of the tower body;

[0010] A first grid, the first grid is arranged corresponding to the unit tube and can be detachably arranged in the inner cavity of the unit tube, the unit tube and the first grid limit a filling cavity for accommodating granular fillers, and the filling cavities in the plurality of unit tubes form a plurality of filling layers in the vertical direction;

[0011] A hoisting assembly is provided corresponding to the unit tube, and is used to be connected with a lifting device to take out the corresponding unit tube from the top of the tower body.

[0012] The ultra-low temperature flue gas purification device of the embodiment of the present invention can reduce the consumption of fillers, and is convenient for replacing fillers, thereby improving the utilization efficiency of fillers and reducing the cost of flue gas purification.

[0013] In some embodiments, the first connection portion is used for plug-fitting with the second connection portion of an adjacent unit barrel, and the first connection portion and the second connection portion are sealingly matched at the connected position.

[0014] In some embodiments, the first connecting portion and the second connecting portion are both conical cylinders, the cross-sectional size of the first connecting portion increases in a direction away from the second connecting portion on the corresponding unit cylinder, and the cross-sectional size of the second connecting portion increases in a direction approaching the first connecting portion on the corresponding unit cylinder.

[0015] In some embodiments, a second grid is included. The second grid is arranged on the unit tube corresponding to the first grid and is located above the first grid. The second grid is used to fix the filler in the filler cavity.

[0016] In some embodiments, the second grille is detachably connected to the unit tube, and the hanging assembly includes a plurality of connecting ears, which are arranged at intervals along the circumference of the second grille and fixedly connected to the second grille.

[0017] In some embodiments, a lifting frame is included, the second grille is movably arranged in the unit cavity along the up and down directions and is adapted to the size of the unit tube, the lifting frame is arranged on the side of the second grille away from the first grille, the lifting frame is detachably connected to the unit tube, and the lifting assembly is arranged on the lifting frame.

[0018] In some embodiments, the lifting assembly includes multiple connecting ropes and connecting lifting rings, one ends of the multiple connecting ropes are respectively connected to the lifting frame, the connecting lifting rings are arranged above the lifting frame and are adjustable in the up and down directions relative to the lifting frame, the other ends of the multiple connecting ropes are respectively connected to the connecting lifting rings, and the connecting lifting rings are used to connect to the lifting equipment.

[0019] In some embodiments, in the same unit tube, the distance between the first grid and the second grid is defined as l, and the height dimension of the unit tube is h, and the relationship between the two is satisfied: l / h≤2 / 3.

[0020] In some embodiments, a sealing ring is included, which is arranged corresponding to the unit tube, the sealing ring is sleeved on the unit tube and is located between the first connecting part and the second connecting part, the sealing ring is adapted to the size of the unit tube, and a support ring is fixedly provided to the inner cavity of the tower body, and the unit tube located at the bottom among the multiple unit tubes is supported on the support ring.

[0021] The flue gas purification system of an embodiment of the present invention includes the ultra-low temperature flue gas purification device of any of the above-mentioned embodiments, and includes a dust collector, a heat recovery component and a chimney, the dust collector is arranged upstream of the ultra-low temperature flue gas purification device, the heat recovery device is arranged downstream of the ultra-low temperature flue gas purification device, the chimney is arranged downstream of the heat recovery component, the ultra-low temperature flue gas purification device is provided with two connecting pipes therebetween, and an ammonia delivery pipe is connected in parallel, and the two ultra-low temperature flue gas purification devices are respectively used for desulfurization and denitrification treatment of flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of an ultra-low temperature flue gas purification device according to an embodiment of the present invention.

[0023] Figure 2 It is a cross-sectional view of a unit tube in an ultra-low temperature flue gas purification device according to an embodiment of the present invention.

[0024] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0025] Figure 4 It is a schematic diagram of the structure of the second grid in the ultra-low temperature flue gas purification device according to an embodiment of the present invention.

[0026] Figure 5 It is a schematic diagram of the assembly of a lifting frame in an ultra-low temperature flue gas purification device according to another embodiment of the present invention.

[0027] Figure 6 It is a schematic structural diagram of a lifting frame in an ultra-low temperature flue gas purification device according to another embodiment of the present invention.

[0028] Reference numerals:

[0029] Tower body 1; tower cover 11; first opening 12; second opening 13;

[0030] Unit cylinder 2; first connecting portion 21; second connecting portion 22; sealing ring 23; sealing ring 24; supporting ring 25;

[0031] First grid 3;

[0032] Lifting assembly 4; connecting lifting lug 41; connecting rope 42; connecting lifting ring 43;

[0033] The second grid 5; the third fixed frame 51; the fourth fixed frame 52; the movable frame 53;

[0034] Lifting frame 6. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0036] like Figure 1 , Figure 2 and Figure 3 As shown, the ultra-low temperature flue gas purification device of the embodiment of the present invention comprises a tower body 1, a plurality of unit tubes 2, a first grid 3 and a hoisting assembly 4, wherein the height direction of the tower body 1 is defined as the up-down direction, an openable tower cover 11 is provided on the top of the tower body 1, a first port 12 for flue gas to pass through is provided on the side wall of the tower body 1, and a second port 13 for flue gas to pass through is provided on the bottom of the tower body 1, a plurality of unit tubes 2 are movably arranged in the inner cavity of the tower body 1 in sequence along the up-down direction and are located between the first port 12 and the second port 13, the unit tubes 2 are sealed with the inner wall of the tower body 1, and the two ends of the unit tubes 2 are respectively provided with There are a first connecting part 21 and a second connecting part 22. The first connecting part 21 of the unit tube 2 is stopped and matched with the second connecting part 22 of the adjacent unit tube 2 in the up and down directions of the tower body 1. The first grid 3 is arranged corresponding to the unit tube 2 and can be detachably arranged in the inner cavity of the unit tube 2. The unit tube 2 and the first grid 3 limit a filling cavity for accommodating granular fillers. The filling cavities in multiple unit tubes 2 form multiple filling layers in the up and down directions. The lifting assembly 4 is arranged corresponding to the unit tube 2. The lifting assembly 4 is used to connect with the lifting equipment to take the corresponding unit tube 2 out from the top of the tower body 1.

[0037] When the ultra-low temperature flue gas purification device of the embodiment of the present invention is in use, the tower cover 11 is opened, a certain amount of filler is placed in the filler cavity of the unit tube 2, and multiple unit tubes 2 are lifted into the tower body 1 in turn by a lifting device. The multiple unit tubes 2 are stacked in turn, and the surrounding sides of the unit tubes 2 are sealed with the inner wall of the tower body 1. The first port 12 of the tower body 1, multiple unit tubes 2 and the second port 13 jointly limit a purification channel for the flue gas to pass through. The flue gas enters the tower body 1 through the first port 12 or the second port 13, passes through multiple filler layers to purify the flue gas, and is discharged from the second port 13 or the first port 12. When the filler is replaced, the unit tube 2 can be taken out of the tower body 1 by a lifting device, and the operation is convenient and reliable.

[0038] The ultra-low temperature flue gas purification device of the embodiment of the present invention can reduce the consumption of fillers, and is convenient for replacing the granular fillers layer by layer, thereby improving the utilization efficiency of the fillers and reducing the cost of flue gas purification.

[0039] Optionally, a temperature measuring point and a flue gas composition measuring point are provided between the first port 12 of the tower body 1 and each packing layer. When the flue gas purification rate of a packing layer decreases by 50%, the packing layer can be replaced through the unit tube 2.

[0040] Optionally, the tower cover 11 is connected to the tower body 1 by bolts, and a sealing gasket is provided on one side of the tower cover 11 close to the tower body 1 .

[0041] In some embodiments, the first port 12 of the tower body 1 is a smoke inlet, and an air intake pipe is connected to the smoke inlet, and a first valve is provided on the air intake pipe. The second port 13 of the tower body 1 is a smoke outlet, and an exhaust pipe is connected to the smoke outlet, and a second valve is provided on the exhaust pipe. By transporting smoke from the top of the tower body 1 into the tower body 1, the height of the packing layer is adjusted, and the residence time of the smoke in the packing layer is adjusted, thereby improving the smoke purification efficiency.

[0042] In other embodiments, the first port 12 of the tower body 1 may be set as a smoke outlet, and the second port 13 of the tower body 1 may be set as a smoke inlet.

[0043] In some embodiments, an exhaust pipe is connected to the tower body 1, the other end of the exhaust pipe is connected to the air intake pipe and connected upstream of the first valve, an exhaust pump is provided on the exhaust pipe, and a third valve is provided between the connection position between the exhaust pump and the exhaust pipe and the tower body 1. Before replacing the packing in the tower body 1, the first valve and the second valve can be closed, and the third valve and the exhaust pump can be opened to extract the smoke in the tower body 1 into the air intake pipe. When the smoke in the tower body 1 is extracted, the third valve is closed and the tower top can be opened to replace the packing to avoid possible smoke leakage when replacing the packing.

[0044] Optionally, a first fixing frame is fixedly provided on the unit tube 2 corresponding to the first grille 3, and the first fixing frame is a rectangular frame welded by angle steel. A second fixing frame is fixedly provided on the first grille 3, and the second fixing frame is also a rectangular frame welded by angle steel. The second fixing frame is located below the first fixing frame, and the second fixing frame and the first fixing frame are connected by bolts, and a first bracket is provided on the second fixing frame, and the first bracket is composed of a plurality of horizontal plates and a plurality of horizontal plates vertically crossed.

[0045] In some embodiments, Figure 2 and Figure 3 As shown, the first connection part 21 is used to be plugged in and matched with the second connection part 22 of the adjacent unit tube 2, and the first connection part 21 and the second connection part 22 are sealed and matched at the connected position. Through the plug-in fit of the first connection part 21 and the second connection part 22 on the two connected unit tubes 2, it is convenient to position and install the two adjacent unit tubes 2, and the plug-in fit of the first connection part 21 and the second connection part 22 is guaranteed. Through the sealed connection between the first connection part 21 and the second connection part 22, it is also convenient for the smoke to pass through multiple packing layers in sequence to achieve the purification of the smoke.

[0046] In some embodiments, Figure 2 and Figure 3 As shown, the first connection part 21 and the second connection part 22 are both conical cylinders, the cross-sectional size of the first connection part 21 increases in the direction away from the second connection part 22 on the corresponding unit cylinder 2, and the cross-sectional size of the second connection part 22 increases in the direction close to the first connection part 21 on the corresponding unit cylinder 2.

[0047] Specifically, the first connection part 21 is arranged above the second connection part 22, which can prevent the first connection part 21 from being deformed by force when the unit tube 2 is placed, affecting the assembly with the second connection part 22. By setting the first connection part 21 and the second connection part 22 to be conical, when the second and subsequent unit tubes 2 are hoisted into the tower, the unit tube 2 can be automatically aligned, and the two adjacent unit tubes 2 can be matched in the radial direction to avoid relative displacement, increase the effective contact area of ​​the first connection part 21 and the second connection part 22 to improve the sealing performance, the end with the largest cross-sectional dimension of the first connection part 21 is adapted to the size of the unit tube 2, and the end with the largest cross-sectional dimension of the second connection part 22 is adapted to the size of the unit tube 2, the first connection part 21 and the second connection part 22 can be used to achieve sealing between the unit tube 2 and the inner wall of the tower body 1, and a sealing ring 23 is provided inside the first connection part 21 or on the outer wall of the second connection part 22, and when the first connection part 21 and the second connection part 22 are matched, the sealing effect between the two can be guaranteed.

[0048] In some embodiments, Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, it includes a second grid 5, which corresponds to the first grid 3 and is arranged in the unit tube 2 and is located above the first grid 3. The second grid 5 is used to fix the filler in the filler cavity. By setting the second grid 5, the filler in the filler cavity can be fixed to avoid the unit tube 2 causing the filler in the filler layer to flow backward during the lifting process, thereby preventing the filler layer from having inconsistent thickness, thereby ensuring the uniformity of the filler thickness.

[0049] In some embodiments, Figure 2 and Figure 4 As shown, the second grid 5 is detachably connected to the unit tube 2 , and the hanging assembly 4 includes a plurality of connecting ears 41 , which are arranged at intervals along the circumference of the second grid 5 and fixedly connected to the second grid 5 .

[0050] Specifically, a third fixing frame 51 is fixedly provided on the unit tube 2 corresponding to the second grid 5, and the third fixing frame 51 is a rectangular frame welded by angle steel. A fourth fixing frame 52 is fixedly provided on the second grid 5, and the fourth fixing frame 52 is also a rectangular frame welded by angle steel. The third fixing frame 51 is arranged below the fourth fixing frame 52, and the third fixing frame 51 and the fourth fixing frame 52 are connected by bolts, and a second bracket is provided on the fourth fixing frame 52, and the second bracket is composed of a plurality of transverse plates and a plurality of transverse plates vertically crossed, and a connecting ear 41 is fixedly provided on the fourth frame to ensure the connection strength between the lifting assembly 4 and the unit tube 2. When replacing the filler in the unit tube 2, the second fixing frame and the fourth fixing frame 52 can be removed to improve the replacement efficiency of the filler.

[0051] In some embodiments, Figure 5 and Figure 6 As shown, it includes a lifting frame 6, a second grid 5 is movably arranged in the unit cavity along the up and down directions and is adapted to the size of the unit tube 2, the lifting frame 6 is arranged on the side of the second grid 5 away from the first grid 3, the lifting frame 6 is detachably connected to the unit tube 2, and the lifting assembly 4 is arranged on the lifting frame 6.

[0052] Specifically, a movable frame 53 is fixedly provided on the second grid 5. The movable frame 53 is a rectangular frame welded by angle steels, and the movable frame 53 and the unit tube 2 are adapted in size. The lifting frame 6 is arranged on the side of the second grid 5 away from the first grid 3. The lifting frame 6 is penetrated by bolts for fixed connection with the unit tube 2. The lifting assembly 4 is arranged on the lifting frame 6. The unit tube 2 is lifted by the lifting device and the lifting frame 6. The operation is convenient, and the thickness of the packing layer can be further adjusted by the second grid 5 with adjustable position.

[0053] In some embodiments, Figure 5 and Figure 6As shown, the lifting assembly 4 includes a plurality of connecting ropes 42 and connecting lifting rings 43. One ends of the plurality of connecting ropes 42 are respectively connected to the lifting frame 6. The connecting lifting rings 43 are arranged above the lifting frame 6 and are adjustable in the up and down directions relative to the lifting frame 6. The other ends of the plurality of connecting ropes 42 are respectively connected to the connecting lifting rings 43. The connecting lifting rings 43 are used to connect to the lifting equipment.

[0054] Specifically, a through rod is provided on the side of the connecting lifting ring 43 close to the lifting frame 6, and the through rod passes through the lifting frame 6 and slides with the lifting frame 6. When the unit tube 2 is lifted, the lifting equipment can be directly connected to the connecting lifting ring 43, and then the unit tube 2 is lifted. The through rod can be used to constrain the position of the connecting lifting ring 43, which is convenient for connecting the connecting lifting ring 43 and the hook of the lifting equipment, and can avoid manual entry into the tower body 1 to connect the lifting equipment and the lifting assembly 4. It is safe, reliable and easy to operate.

[0055] In some embodiments, in the same unit tube 2, the distance between the first grid 3 and the second grid 5 is defined as l, and the height dimension of the unit tube 2 is h, and the relationship between the two is satisfied: l / h≤2 / 3. By limiting the distance between the first grid 3 and the second grid 5, that is, limiting the filler in the unit tube 2, after multiple unit tubes 2 are installed in sequence, the distance between two adjacent filler layers can be guaranteed, thereby ensuring that there is space between each layer, thereby avoiding the occurrence of problems such as temperature runaway and spontaneous combustion caused by a large amount of accumulated heat.

[0056] In some embodiments, Figure 1 and Figure 3 As shown, it includes a sealing ring 24, which is arranged corresponding to the unit tube 2. The sealing ring 24 is sleeved on the unit tube 2 and is located between the first connecting portion 21 and the second connecting portion 22. The sealing ring 24 is adapted to the size of the unit tube 2. The sealing ring 24 can achieve sealing between the unit tube 2 and the inner wall of the tower body 1 to ensure the purification effect of the flue gas. The inner cavity of the tower body 1 is fixedly provided with a support ring 25, and the unit tube 2 located at the bottom of the multiple unit tubes 2 is supported on the support ring 25. By providing the support ring 25, it is convenient to support the unit tube 2 and avoid the unit tube 2 located at the bottom from being deformed under the action of gravity and the tower body 1.

[0057] The following describes a flue gas purification system according to an embodiment of the present invention.

[0058] The flue gas purification system of an embodiment of the present invention includes an ultra-low temperature flue gas purification device of any of the above-mentioned embodiments, and includes a dust collector, a heat recovery component and a chimney. The dust collector is arranged upstream of the ultra-low temperature flue gas purification device, and the dust collector is used to perform dust removal operations on the flue gas transported to the ultra-low temperature flue gas purification device. The heat recovery device is arranged downstream of the ultra-low temperature flue gas purification device, and the heat recovery device is used to absorb the heat in the flue gas through heat exchange for reuse. The chimney is arranged downstream of the heat recovery component to transport the purified gas into the atmosphere. Two ultra-low temperature flue gas purification devices are provided. The filling cavity of the ultra-low temperature flue gas purification device located upstream is filled with activated carbon or granular alkaline desulfurizer, and the filling cavity of the ultra-low temperature flue gas purification device located downstream is filled with activated carbon or other ultra-low temperature SCR catalysts. An ammonia delivery pipe is connected in parallel to the connecting pipe between the two ultra-low temperature flue gas purification devices. The ultra-low temperature flue gas purification device located upstream is used to desulfurize the flue gas, and the ultra-low temperature flue gas purification device located downstream is used to denitrify the flue gas.

[0059] When the flue gas purification system of the embodiment of the present invention is in use, the flue gas is dedusted by the dust collector, and then enters the ultra-low temperature flue gas purification device located upstream through the first port or the second port, passes through multiple packing layers, and is desulfurized under the action of activated carbon or granular alkaline desulfurizer. The flue gas after desulfurization is mixed with ammonia transported in the ammonia delivery pipe and reaches the ultra-low temperature flue gas purification device located downstream, passes through multiple packing layers, and is denitrated under the action of activated carbon or other ultra-low temperature SCR catalysts. The gas after denitration is heat exchanged at the heat recovery component to release heat, and is finally discharged through the chimney. The flue gas purification system of the embodiment of the present invention can realize rapid processing of flue gas, and is convenient for replacing packing, and can reduce the consumption of packing, improve the utilization efficiency of packing, and reduce the cost of flue gas purification.

[0060] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0061] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An ultra-low temperature flue gas purification device, characterized in that: include: A tower body, wherein an openable tower cover is provided on the top of the tower body, a first opening for smoke to pass through is provided on the side wall of the tower body, and a second opening for smoke to pass through is provided on the bottom of the tower body; A plurality of unit tubes, the plurality of unit tubes are movably arranged in sequence in the inner cavity of the tower body along the up-down direction and are located between the first port and the second port, the unit tubes are sealed with the inner wall of the tower body, the two ends of the unit tubes are respectively provided with a first connecting portion and a second connecting portion, and the first connecting portion of the unit tube is blocked and matched with the second connecting portion of the adjacent unit tube in the up-down direction of the tower body; A first grid, the first grid is arranged corresponding to the unit tube and can be detachably arranged in the inner cavity of the unit tube, the unit tube and the first grid limit a filling cavity for accommodating granular fillers, and the filling cavities in the plurality of unit tubes form a plurality of filling layers in the vertical direction; A hoisting assembly is provided corresponding to the unit tube, and is used to be connected with a lifting device to take out the corresponding unit tube from the top of the tower body.

2. The ultra-low temperature flue gas purification device according to claim 1, characterized in that: The first connection portion is used for plug-fitting with the second connection portion of the adjacent unit tube, and the first connection portion and the second connection portion are sealed and matched at the connected position.

3. The ultra-low temperature flue gas purification device according to claim 2, characterized in that: The first connection part and the second connection part are both tapered tubes, the cross-sectional size of the first connection part increases in a direction away from the second connection part on the corresponding unit tube, and the cross-sectional size of the second connection part increases in a direction approaching the first connection part on the corresponding unit tube.

4. The ultra-low temperature flue gas purification device according to claim 1, characterized in that: It comprises a second grid, which is arranged on the unit tube corresponding to the first grid and is located above the first grid, and is used to fix the filler in the filler cavity.

5. The ultra-low temperature flue gas purification device according to claim 4, characterized in that: The second grille is detachably connected to the unit tube, and the hanging assembly includes a plurality of connecting ears, which are arranged at intervals along the circumference of the second grille and fixedly connected to the second grille.

6. The ultra-low temperature flue gas purification device according to claim 4, characterized in that: It includes a lifting frame, the second grid is movably arranged in the unit cavity along the up and down direction and is adapted to the size of the unit tube, the lifting frame is arranged on the side of the second grid away from the first grid, the lifting frame is detachably connected to the unit tube, and the lifting assembly is arranged on the lifting frame.

7. The ultra-low temperature flue gas purification device according to claim 6, characterized in that: The lifting assembly includes multiple connecting ropes and connecting lifting rings, one ends of the multiple connecting ropes are respectively connected to the lifting frame, the connecting lifting rings are arranged above the lifting frame and can be adjusted in the up and down directions relative to the lifting frame, the other ends of the multiple connecting ropes are respectively connected to the connecting lifting rings, and the connecting lifting rings are used to connect to the lifting equipment.

8. The ultra-low temperature flue gas purification device according to claim 4, characterized in that: In the same unit tube, the distance between the first grid and the second grid is defined as l, and the height dimension of the unit tube is h, and the relationship between the two is satisfied: l / h≤2 / 3.

9. The ultra-low temperature flue gas purification device according to claim 1, characterized in that: It includes a sealing ring, which is arranged corresponding to the unit tube, the sealing ring is sleeved on the unit tube and located between the first connecting part and the second connecting part, the sealing ring is adapted to the size of the unit tube, and a support ring is fixedly provided in the inner cavity of the tower body, and the unit tube located at the bottom among the multiple unit tubes is supported by the support ring.

10. A flue gas purification system, characterized in that: It comprises the ultra-low temperature flue gas purification device as described in any one of claims 1 to 9, and comprises a dust collector, a heat recovery component and a chimney, the dust collector is arranged upstream of the ultra-low temperature flue gas purification device, the heat recovery device is arranged downstream of the ultra-low temperature flue gas purification device, the chimney is arranged downstream of the heat recovery component, the ultra-low temperature flue gas purification device is provided with two connecting pipes therebetween and an ammonia delivery pipe is connected in parallel, and the two ultra-low temperature flue gas purification devices are respectively used for desulfurization and denitrification of flue gas.

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