Discharge hopper suitable for low-temperature adsorption tower and low-temperature adsorption tower

Abstract

The discharge hopper comprises a hopper body and a plurality of rib plates, the rib plates extend in the vertical direction, and the bottom ends of the rib plates are connected with the inner wall face of the hopper body and arranged at intervals in the vertical direction; an included angle is formed between the extending direction of the rib plates and the inner wall face of the hopper body so as to form a material storage area used for storing materials, part of the adsorbent is stored in the material storage area, the falling adsorbent and an adsorbent layer on the top of the material storage area generate relative displacement, the other adsorbent in the discharging cavity is prevented from being in direct contact and friction with the inner wall face of the hopper body during discharging, and the service life of the adsorbent is prolonged. The contact friction between the adsorbents and the inner wall surface of the hopper is replaced by the relative displacement between the adsorbents, so that the loss of the adsorbents is greatly reduced, and the dust amount generated by the wear of the adsorbents is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of flue gas adsorption, in particular to a discharge hopper suitable for a low-temperature adsorption tower and a low-temperature adsorption tower. Background Art

[0002] The basic principle of flue gas adsorption technology is to remove pollutant components from flue gas through the adsorption principle of adsorbents. The flue gas adsorption system proposed in the relevant technology uses adsorbents to purify flue gas. In order to ensure the adsorption efficiency of the adsorbent in the adsorption bed, the saturated adsorbent at the bottom of the adsorption bed needs to be unloaded in time. Generally, a discharge hopper is set at the bottom of the adsorption bed. After the adsorbent enters the discharge hopper from the top opening of the discharge hopper, part of the adsorbent close to the inner wall of the discharge hopper will slide or roll downward along the inner wall of the discharge hopper. The contact and friction between the adsorbent and the inner wall of the discharge hopper will cause loss to the adsorbent to a certain extent and produce adsorbent powder. Due to the light weight of the powder, it may flow upward with the flue gas and be discharged from the flue gas outlet, increasing the amount of dust in the flue gas. Summary of the invention

[0003] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0004] Traditionally, flue gas adsorption is usually high-temperature adsorption, that is, the flue gas discharged from the boiler is cooled to about 200°C through a cooling tower, and then enters the flue gas adsorption tower for high-temperature adsorption purification. High-temperature adsorption has the problems of large adsorbent consumption, poor adsorption effect, high nitrogen oxide content in the clean flue gas after adsorption, and failure to achieve near-zero emissions.

[0005] In order to overcome the problem of high-temperature adsorption, the relevant technology proposes a flue gas low-temperature adsorption technology, which is to cool the flue gas to a low-temperature flue gas below room temperature, for example, and then remove the pollutant components in the flue gas by adsorption. In low-temperature adsorption, the adsorption capacity of the adsorbent is increased exponentially in a low-temperature environment, which greatly improves the adsorption purification rate compared to conventional high-temperature flue gas adsorption, and can achieve near-zero emissions of flue gas. However, the inventors have realized through research that compared with conventional high-temperature adsorbents, the low-temperature adsorbents used in the low-temperature adsorption process are more fragile in structure due to being in a low-temperature environment for a long time, and are more likely to be crushed due to collision and wear, resulting in increased adsorbent loss and an increase in the amount of dust in the exhaust gas.

[0006] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a discharge hopper suitable for a cryogenic adsorption tower, which effectively solves the problem of easy wear of cryogenic adsorbent.

[0007] The embodiment of the present invention further provides a low-temperature adsorption tower having the above-mentioned discharge hopper.

[0008] The unloading hopper of the embodiment of the present invention includes: a hopper body, a unloading cavity is defined in the hopper body, the inner wall surface of the hopper body is an inclined surface and the cross-sectional area of ​​the unloading cavity gradually decreases from top to bottom, the top of the unloading cavity is open to form a feed port, and the bottom of the hopper body is provided with a unloading port connected to the unloading cavity; a plurality of ribs, the ribs extend in the up-down direction, the bottom ends of the plurality of ribs are connected to the inner wall surface of the hopper body and are spaced apart in the vertical direction, the extension direction of the ribs and the inner wall surface of the hopper body have an angle to form a storage area, the adsorbent close to the inner wall surface of the hopper body is stored in the storage area to prevent the remaining adsorbent from contacting the inner wall surface of the hopper body during the falling process.

[0009] The discharge hopper provided in the embodiment of the present invention is provided with a plurality of ribs in the hopper body, and a storage area is formed between the ribs and the inner wall surface of the hopper body. A part of the adsorbent is stored in the storage area, so that the falling adsorbent and the adsorbent layer on the top of the storage area are relatively displaced, so as to avoid direct contact and friction between the remaining adsorbent in the discharge cavity and the inner wall surface of the hopper body during discharge. Instead, the contact friction between the adsorbent and the inner wall surface of the hopper is replaced by relative displacement between the adsorbent and the adsorbent, which greatly reduces the loss of the adsorbent and reduces the amount of dust generated by the adsorbent wear.

[0010] After testing, when unloading with a discharge hopper with a smooth inner wall, the adsorbent rolls downward along the inner wall of the discharge hopper, and during the rolling process, due to continuous mechanical collision and contact friction with the inner wall, the adsorbent breakage rate reaches more than 10%. When unloading with the discharge hopper provided in the embodiment of the present invention, the adsorbent breakage rate is reduced to 6%-8%. Therefore, unloading with the discharge hopper provided in the embodiment of the present invention with ribs on the inner wall can effectively reduce the loss of adsorbent and reduce the amount of dust in the exhaust gas. It is particularly suitable for low-temperature adsorption, and the unloading of low-temperature adsorbent effectively protects the structural integrity of the low-temperature adsorbent and reduces the cost of low-temperature adsorption. In some embodiments, the angle between the ribs and the inner wall of the hopper body is 30°-60°. When the angle a is greater than or equal to 30° and less than or equal to 60°, sufficient adsorbent can be stored in the storage area, effectively avoiding direct contact between the falling adsorbent and the inner wall of the hopper body and the ribs.

[0011] In some embodiments, the ribs are arranged vertically; and / or, in the longitudinal section of the hopper body, the inner wall surface of the hopper body includes two wall segments arranged opposite to each other in a direction orthogonal to the vertical direction, and the angle between the two oppositely arranged wall segments is 60°-120°. This makes the structure of the hopper body reasonable. If the angle b between the two opposite inner walls of the hopper body is less than 60°, the top opening size of the hopper body will be smaller, and the amount of adsorbent received by the hopper body will be less. If the angle b between the two opposite inner walls of the hopper body is greater than 120°, the inclination of the inner wall surface of the hopper body will be insufficient, and the discharge of the adsorbent in the discharge chamber may be hindered.

[0012] In some embodiments, the rib is annular, and a plurality of the ribs are spaced apart from top to bottom along the inner wall of the hopper body to more comprehensively avoid contact and friction between the adsorbent and the inner wall of the hopper body.

[0013] In some embodiments, of the two adjacent ribs in the vertical direction, the top end of the lower rib is located below the bottom end of the upper rib in the vertical direction. This can reduce the number of ribs provided in the hopper body while minimizing the contact and friction between the falling adsorbent and the inner wall surface of the hopper body, thereby reducing the construction cost of the unloading hopper, and helping to reduce the volume of the adsorbent stored in the storage area and reduce the dead zone in the unloading hopper.

[0014] In some embodiments, in the longitudinal section of the hopper body, among the two adjacent ribs in the vertical direction, the angle between the line between the top peripheral edge of the lower rib and the bottom peripheral edge of the upper rib and the horizontal plane is 15°-30°. This can reduce the construction cost of the discharge hopper and reduce the stagnant dead zone in the discharge hopper while basically preventing the adsorbent from contacting and rubbing against the inner wall surface of the hopper body.

[0015] In some embodiments, the height of the ribs in the vertical direction is 15 cm to 30 cm. If the ribs are too short, the depth of the storage area will be insufficient, and the adsorbent stored in the storage area will be unstable, resulting in poor anti-wear effect. If the ribs are too high, the depth of the storage area will be too deep, and too much adsorbent will be stored, resulting in a large dead zone in the discharge hopper and slow discharge efficiency.

[0016] And / or, of two adjacent ribs in the vertical direction, the distance between the top of the lower rib and the bottom of the upper rib is 7 cm to 11 cm, which can basically prevent the adsorbent from contacting the inner wall surface of the hopper body 110, and can also reduce the construction cost of the discharge hopper 100 and reduce the stagnant dead zone in the discharge hopper 100;

[0017] And / or, the hopper body has a vertical height of 2 meters to 4 meters;

[0018] And / or, the number of the ribs in the hopper body is 9-13.

[0019] In some embodiments, the outer contour of the cross section of the discharge cavity is rectangular, the hopper body is formed by four hopper walls spliced ​​in sequence in the circumferential direction, and a plurality of the ribs are provided on the inner wall surface of each of the hopper walls.

[0020] In some embodiments, the outer peripheral contour of the cross section of the feed port is a rectangle, and the side length of the feed port is 4 meters to 8 meters;

[0021] And / or, the discharge port is circular, and the diameter of the discharge port is 25 cm-50 cm.

[0022] Another aspect of the present invention provides a low-temperature adsorption tower, comprising:

[0023] An adsorption module, in which an adsorbent is piled, the adsorption module is used to treat low-temperature flue gas with a temperature below room temperature, and the adsorption module has a feeding port and a discharging port;

[0024] A discharge hopper is located below the discharge port of the adsorption module and is used to discharge the adsorbent discharged from the discharge port of the adsorption module. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a front cross-sectional view of a discharge hopper provided in an embodiment of the present invention.

[0026] Figure 2 It is a top view of the discharge hopper provided in an embodiment of the present invention.

[0027] Figure 3 It is a front view of a discharge hopper provided in an embodiment of the present invention.

[0028] Reference numerals:

[0029] Discharge hopper 100 , feed port 101 , discharge port 102 , hopper body 110 , discharge cavity 111 , hopper wall 112 , reinforcement ribs 113 , inspection port 114 , ribs 120 , and material storage area 121 . DETAILED DESCRIPTION

[0030] 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.

[0031] According to the following Figure 1-Figure 3 The unloading hopper 100 applicable to a cryogenic adsorption tower and the cryogenic adsorption tower having the unloading hopper 100 provided in an embodiment of the present invention are described.

[0032] The discharge hopper 100 includes a hopper body 110 and a plurality of ribs 120. A discharge cavity 111 is defined in the hopper body 110, the inner wall surface of the hopper body 110 is an inclined surface, and the cross-sectional area of ​​the discharge cavity 111 gradually decreases from top to bottom. The top of the discharge cavity 111 is open to form a feed port 101, and the bottom of the hopper body 110 is provided with a discharge port 102 connected to the discharge cavity 111.

[0033] The ribs 120 extend in the up-down direction and have a top and a bottom. It should be noted that the "up-down direction" here does not refer to the vertical direction, and the up-down direction may include the vertical direction and may include the oblique up-down direction. The bottom ends of the multiple ribs 120 are connected to the inner wall surface of the hopper body 110 and are arranged at intervals in the vertical direction. The extending direction of the ribs 120 and the inner wall surface of the hopper body 110 have an angle to form a storage area 121 for storing materials. It should be noted that the "extending direction of the ribs 120" refers to its extending direction in the up-down direction, and the angle formed between it and the inner wall surface of the hopper body 100 refers to the angle formed between the adjacent inner wall surface. Since the bottom end of the ribs 120 is connected to the inner wall surface of the hopper body 110, the top of the storage area 121 formed between the ribs 120 and the inner wall surface of the hopper body 110 is open, and the storage area 121 has a certain depth, so that it can be used for storing materials.

[0034] When the adsorbent enters the discharge chamber 111 through the feed port 101, the adsorbent near the inner wall of the hopper body 110 enters the storage area 121 between the rib plate 120 and the inner wall of the hopper body 110 and is stored, and the remaining adsorbent contacts the adsorbent layer at the top of the storage area 121 during the falling process and generates relative displacement, effectively avoiding the falling adsorbent from directly contacting the inner wall of the hopper body 110. Since the friction between adsorbents is greatly weakened compared to the friction between adsorbents and the inner wall, the problem of increased dust caused by adsorbent wear can be effectively avoided.

[0035] The discharge hopper provided in the embodiment of the present invention is provided with a plurality of ribs in the hopper body, and a storage area is formed between the ribs and the inner wall surface of the hopper body. A part of the adsorbent is stored in the storage area, so that the falling adsorbent and the adsorbent layer on the top of the storage area are relatively displaced, so as to avoid direct contact and friction between the remaining adsorbent in the discharge cavity and the inner wall surface of the hopper body during discharge. Instead, the contact friction between the adsorbent and the inner wall surface of the hopper is replaced by relative displacement between the adsorbent and the adsorbent, which greatly reduces the loss of the adsorbent and reduces the amount of dust generated by the adsorbent wear.

[0036] After testing, when unloading with a discharge hopper with a smooth inner wall, the adsorbent rolls downward along the inner wall of the discharge hopper, and during the rolling process, due to continuous mechanical collision and contact friction with the inner wall, the adsorbent breakage rate reaches more than 10%. When unloading with the discharge hopper provided by the embodiment of the present invention, the adsorbent breakage rate is reduced to 6%-8%. Therefore, unloading with the discharge hopper provided by the embodiment of the present invention with ribs on the inner wall can effectively reduce the loss of adsorbent and reduce the amount of dust in the exhaust gas, which is particularly suitable for low-temperature adsorption. The unloading of low-temperature adsorbent effectively protects the structural integrity of the low-temperature adsorbent and reduces the cost of low-temperature adsorption.

[0037] In some preferred embodiments, Figure 1 As shown, ribs 120 are provided on the inner wall surfaces around the hopper body 110 .

[0038] In some embodiments, Figure 1 As shown, the angle a between the rib plate 120 and the inner wall surface of the hopper body 110 is 30°-60°. Since the material storage area 121 is formed between the rib plate 120 and the inner wall surface of the hopper body 110, the side surface of the rib plate 121 close to the inner wall surface of the hopper body 110 and the inner wall surface of the hopper body 110 serve as two side wall surfaces of the material storage area 121, and the angle between the two side wall surfaces of the material storage area 121 is a, and the value range of the angle a is 30°-60°.

[0039] The size of the angle a is related to the inclination of the inner wall surface of the hopper body 110 and the inclination of the rib plate 120. If the angle a between the rib plate 120 and the adjacent inner wall surface is less than 30°, the amount of adsorbent that can be stored in the storage area 121 will be small, and it may cause the falling adsorbent to contact and wear the side wall surface of the rib plate 120, resulting in adsorbent wear. If the angle a between the rib plate 120 and the adjacent inner wall surface is greater than 60°, it may not be possible to effectively prevent the falling adsorbent from contacting the inner wall surface of the hopper body 110, resulting in an unsatisfactory anti-wear effect.

[0040] Therefore, the angle a is set to be greater than or equal to 30° and less than or equal to 60°, so that a sufficient amount of adsorbent can be stored in the storage area 121 , thereby effectively preventing the falling adsorbent from directly contacting the inner wall surface of the hopper body 110 and the ribs 120 .

[0041] Further optionally, the angle a is 35°-45°.

[0042] In some specific embodiments, the angle a is 37.5°, 40° or 42.5°.

[0043] In some embodiments, the ribs 120 are arranged vertically. Figure 1As shown, the hopper body 110 is a symmetrical structure. In the longitudinal section of the discharge hopper 100 , the angle b between the two opposite inner wall surfaces of the hopper body 110 is 2a.

[0044] Alternatively, if Figure 1 As shown, in the longitudinal section of the hopper body 110, the inner wall surface of the hopper body 110 includes two wall surface segments arranged opposite to each other in a direction orthogonal to the vertical direction, and the angle between the two opposite wall surface segments is 60°-120°, so that the structure of the hopper body 110 is reasonable. If the angle b between the two opposite inner wall surfaces of the hopper body 110 is less than 60°, the size of the top opening (feeding port 101) of the hopper body 110 will be smaller, and the amount of adsorbent received by the hopper body 110 will be less. If the angle b between the two opposite inner wall surfaces of the hopper body 110 is greater than 120°, the inclination of the inner wall surface of the hopper body 110 will be insufficient, and the discharge of the adsorbent in the discharge chamber 111 may be blocked.

[0045] Further optionally, the angle b is 70°-90°.

[0046] In some specific embodiments, the angle b is 75°, 80° or 85°.

[0047] In some embodiments, Figure 1 As shown, the rib plate 120 is annular, and a plurality of rib plates 120 are arranged at intervals from top to bottom along the inner wall surface of the hopper body 110 to more comprehensively avoid contact and friction between the adsorbent and the inner wall surface of the hopper body 110 .

[0048] In some embodiments, Figure 1 As shown, among the two adjacent ribs 120 in the vertical direction, the top end of the lower rib 120 is located below the bottom end of the upper rib 120 in the vertical direction, so that in the longitudinal section of the hopper body 110, the connection line between the top peripheral edge of the lower rib 120 and the bottom peripheral edge of the upper rib 120 is an oblique line. The top end of the lower rib 120 is located below the bottom end of the upper rib 120 in the vertical direction, which can reduce the number of ribs 120 provided in the hopper body 110 while avoiding the contact and friction between the falling adsorbent and the inner wall surface of the hopper body 110 as much as possible, reduce the construction cost of the discharge hopper 100, and help reduce the volume of the adsorbent stored in the storage area 121, and reduce the dead zone in the discharge hopper 100.

[0049] Further optionally, in the longitudinal section of the hopper body 110, among two adjacent ribs 120 in the vertical direction, an angle c between a line connecting the top peripheral edge of the lower rib 120 and the bottom peripheral edge of the upper rib 120 and a horizontal plane is 15°-30°.

[0050] Specifically, Figure 1As shown, the top circumference of the rib plate 120 located at the bottom is located below the bottom circumference of the rib plate 120 located at the top, and the line connecting the top circumference of the rib plate 120 located at the bottom and the bottom circumference of the rib plate 120 located at the top is an oblique line, and the angle c between the oblique line and the horizontal plane is greater than or equal to 15° and less than or equal to 30°. If the angle c is less than 15°, the distance between two adjacent rib plates 120 will be small, and a large number of rib plates 120 need to be arranged in the hopper body 110, which increases the construction cost of the discharge hopper 100, and at the same time, more adsorbent will be retained in the storage area 121, resulting in too many dead corners in the discharge hopper 100 and increasing the burden of the discharge hopper 100. If the angle c is greater than 30°, the distance between two adjacent layers of rib plates 120 will be too large, resulting in a part of the falling adsorbent still contacting the inner wall surface of the hopper body 110 to generate friction.

[0051] Therefore, in the longitudinal section of the discharge hopper 140, the angle c between the line connecting the top peripheral edge of the lower rib 120 and the bottom peripheral edge of the upper rib 120 and the horizontal plane is 15°-30°. This can reduce the construction cost of the discharge hopper 100 and reduce the stagnant dead zone in the discharge hopper 100 while basically preventing the adsorbent from contacting and rubbing against the inner wall surface of the hopper body 110.

[0052] In some specific embodiments, the angle c is 20°.

[0053] Of course, in other embodiments, the top of the lower rib 120 can be flush with the bottom of the upper rib 120 in the vertical direction, or located above the bottom of the upper rib 120. Preferably, the top of the lower rib 120 is located below the bottom of the upper rib 120 in the vertical direction.

[0054] In some optional embodiments, the height of the rib plate 120 in the vertical direction is 15 cm to 30 cm. If the rib plate 120 is too short, the depth of the storage area 121 will be insufficient, and the adsorbent stored in the storage area 121 will be unstable, resulting in poor anti-wear effect. If the rib plate 120 is too high, the depth of the storage area 121 will be too deep, and too much adsorbent will be stored, resulting in too large a dead zone in the discharge hopper 100 and slow discharge efficiency.

[0055] For example, the height of the rib 120 in the vertical direction is 15 cm, 20 cm, 25 cm or 30 cm.

[0056] In some preferred embodiments, the rib 120 has a vertical height of 20 centimeters.

[0057] In some optional embodiments, of two adjacent ribs 120 in the vertical direction, the distance between the top of the lower rib 120 and the bottom of the upper rib 120 is 7 cm-11 cm. If the distance is greater than 11 cm, part of the adsorbent will contact the inner wall surface of the hopper body 110, affecting the anti-wear effect. If the distance is less than 7 cm, the number of ribs 120 will be increased. When the distance is within the range of 7 cm-11 cm, the adsorbent can be basically prevented from contacting the inner wall surface of the hopper body 110, and the construction cost of the discharge hopper 100 can be reduced, and the stagnant dead zone in the discharge hopper 100 can be reduced.

[0058] For example, in two adjacent ribs 120 in the vertical direction, the distance between the top end of the lower rib 120 and the bottom end of the upper rib 120 is 7 cm, 8 cm, 9 cm, 10 cm or 11 cm.

[0059] In some preferred embodiments, the distance between the top end of the lower rib 120 and the bottom end of the upper rib 120 is 9 cm.

[0060] In some optional embodiments, the height of the hopper body 110 in the vertical direction is 2 meters to 4 meters. The height of the hopper body 110 in the vertical direction refers to the distance between its feed port 101 and discharge port 102 in the vertical direction. For example, the height of the hopper body 110 in the vertical direction is 2 meters, 3 meters, 3.5 meters or 4 meters. The height of the hopper body 110 in the vertical direction can be set according to actual needs.

[0061] As an example, in some specific embodiments, the hopper body 110 has a vertical height of 3.8 meters.

[0062] In some optional embodiments, the number of ribs 120 provided in the hopper body 110 is 9 to 13. The number of ribs 120 provided in the hopper body 110 is designed according to the height of the hopper body 110, the height of the ribs 120, and the spacing between the ribs 120. It is preferred that the ribs 120 are evenly arranged in the hopper body 110 to achieve the best anti-wear effect.

[0063] In some optional embodiments, the thickness of the rib 120 is 1 mm-5 mm. Under the premise of ensuring mechanical strength, the thickness of the rib 120 is reduced as much as possible to reduce the possibility of the rib 120 causing damage to the adsorbent.

[0064] In some embodiments, Figure 2 As shown, the horizontal cross-section of the discharge cavity 111 is rectangular, and the hopper body 110 is formed by four hopper walls 112 sequentially spliced ​​in the circumferential direction, and a plurality of ribs 120 are connected on the inner wall surface of each hopper wall 112.

[0065] Preferably, the rib plate 120 is annular, the shape of the annular rib plate 120 is adapted to the shape of the discharge cavity 111 , and the rib plate 120 is connected to the inner wall surfaces of the four hopper walls 112 .

[0066] Of course, in other alternative embodiments, the horizontal cross-section of the discharge chamber 111 can be other polygonal or circular shapes.

[0067] like Figure 2 As shown, a plurality of reinforcing ribs 113 are disposed on the outer side and the inner side of the hopper wall 112 of the hopper body 110 to enhance the structural strength of the hopper body 110 .

[0068] Furthermore, if Figure 3 As shown, the hopper body 110 is provided with an inspection port 114 , which is used to inspect the structural parts in the hopper body 110 , and when the adsorbent is blocked, it can be unblocked through the inspection port 114 .

[0069] In some embodiments, Figure 2 As shown, the feed port 101 of the hopper body 110 is rectangular, and the side length of the feed port 101 is 4 meters to 8 meters. The side length of the feed port 101 can be selected according to the required discharge volume.

[0070] As an example, in a specific embodiment, the feed port 101 is 6.4 meters long and 5.8 meters wide.

[0071] In other alternative embodiments, the feed port 101 of the hopper body 110 may be circular, and the diameter of the feed port 101 is 4 meters to 8 meters.

[0072] In some embodiments, the discharge port 102 of the hopper body 110 is circular, and the diameter of the discharge port 102 is 25 cm-50 cm. The diameter of the discharge port 102 can be selected according to the required discharge volume.

[0073] As an example, in one specific embodiment, the diameter of the discharge port 102 is 37 cm to 38 cm.

[0074] In other alternative embodiments, the discharge port 102 of the hopper body 110 may be a quadrilateral, and the side length of the discharge port 102 is 25 cm-50 cm.

[0075] The embodiment of the present invention also proposes a low-temperature adsorption tower, which includes: an adsorption module, an adsorption bed formed by stacking adsorbent in the adsorption module, the adsorption module is used to treat low-temperature flue gas with a temperature below room temperature, and the adsorption module has a feeding port and a discharging port. The feeding port is used to feed new adsorbent into the adsorption module, and the unloading hopper 100 is located below the discharging port of the adsorption module and is used to discharge the adsorbent discharged from the discharging port of the adsorption module.

[0076] Specifically, the adsorption module also has a flue gas inlet and a flue gas outlet. The flue gas is cooled by the flue gas cooling device to become low-temperature flue gas. The low-temperature flue gas with a temperature below room temperature is input into the adsorption module through the flue gas inlet. The low-temperature flue gas contacts the adsorbent in the adsorption bed for low-temperature physical adsorption, becomes clean flue gas and is discharged from the flue gas outlet. The adsorbent in the adsorption bed is gradually saturated with adsorption and discharged downward through the discharge hopper 100.

[0077] Preferably, the temperature of the low-temperature flue gas is below zero, for example, -80°C to -5°C.

[0078] More preferably, the temperature of the low-temperature flue gas is -20°C to -5°C. The inventors have found through research that the lower the flue gas temperature, the more beneficial it is for adsorption purification. However, if the flue gas temperature is too low, the equipment structure for cooling the flue gas will be complicated and the energy consumption will increase. For example, it is required to set up an insulation layer for the cooling equipment, adsorption tower and pipeline, and the sealing requirements are high, which will increase the cost. In addition, too low temperature conditions will easily cause condensation water to appear in the adsorption tower, causing the adsorbent to stick and clog, affecting the adsorption. Therefore, it is beneficial to cool the flue gas temperature to -20°C to -5°C. 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.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean 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 described specific features, structures, materials or characteristics 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.

[0083] 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. A discharge hopper suitable for a low-temperature adsorption tower, characterized in that: include: A hopper body, wherein a discharge cavity is defined in the hopper body, the inner wall surface of the hopper body is an inclined surface and the cross-sectional area of ​​the discharge cavity gradually decreases from top to bottom, the top of the discharge cavity is open to form a feed inlet, and the bottom of the hopper body is provided with a discharge port connected to the discharge cavity; A plurality of ribs are provided, wherein the ribs extend in the up-down direction, the bottom ends of the ribs are connected to the inner wall surface of the hopper body and are spaced apart in the vertical direction, an angle is formed between the extending direction of the ribs and the inner wall surface of the hopper body to form a material storage area, and the adsorbent close to the inner wall surface of the hopper body is stored in the material storage area to prevent the remaining adsorbent from contacting the inner wall surface of the hopper body during the falling process.

2. The discharge hopper suitable for a low-temperature adsorption tower according to claim 1, characterized in that: The angle between the rib plate and the inner wall surface of the hopper body is 30°-60°.

3. The discharge hopper suitable for a low-temperature adsorption tower according to claim 1 or 2, characterized in that: The ribs are arranged vertically; and / or, In the longitudinal section of the hopper body, the inner wall surface of the hopper body includes two wall segments arranged opposite to each other in a direction orthogonal to the vertical direction, and the angle between the two wall segments arranged opposite to each other is 60°-120°.

4. The discharge hopper suitable for a low-temperature adsorption tower according to claim 1, characterized in that: The rib plate is annular, and a plurality of the rib plates are arranged at intervals from top to bottom along the inner wall surface of the hopper body.

5. The discharge hopper suitable for a low-temperature adsorption tower according to claim 1 or 4, characterized in that: Of the two ribs adjacent to each other in the vertical direction, the top end of the lower rib is located below the bottom end of the upper rib in the vertical direction.

6. The discharge hopper suitable for a low-temperature adsorption tower according to claim 5, characterized in that: In the longitudinal section of the hopper body, among two adjacent ribs in the vertical direction, the angle between the line between the top peripheral edge of the lower rib and the bottom peripheral edge of the upper rib and the horizontal plane is 15°-30°.

7. The discharge hopper suitable for a low-temperature adsorption tower according to claim 5, characterized in that: The height of the rib in the vertical direction is 15 cm to 30 cm; and / or, of two adjacent ribs in the vertical direction, the distance between the top end of the lower rib and the bottom end of the upper rib is 7 cm to 11 cm; And / or, the hopper body has a vertical height of 2 meters to 4 meters; And / or, the number of the ribs in the hopper body is 9-13.

8. The discharge hopper suitable for a low-temperature adsorption tower according to claim 1, characterized in that: The outer peripheral contour of the cross section of the discharge cavity is rectangular, and the hopper body is formed by four hopper walls spliced ​​in sequence in the circumferential direction, and a plurality of ribs are arranged on the inner wall surface of each hopper wall.

9. The discharge hopper suitable for a low-temperature adsorption tower according to claim 8, characterized in that: The outer peripheral contour of the cross section of the feed port is a rectangle, and the side length of the feed port is 4 meters to 8 meters; And / or, the discharge port is circular, and the diameter of the discharge port is 25 cm-50 cm.

10. A low temperature adsorption tower, characterized in that: include: An adsorption module, in which an adsorbent is piled, the adsorption module is used to treat low-temperature flue gas with a temperature below room temperature, and the adsorption module has a feeding port and a discharging port; The discharge hopper according to any one of claims 1 to 9 is located below the discharge port of the adsorption module for discharging the adsorbent discharged from the discharge port of the adsorption module.

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