CN117861639A - Adsorbent regeneration tower and low-temperature adsorption regeneration system - Google Patents

Abstract

The invention discloses an adsorbent regeneration tower and a low-temperature adsorption regeneration system, wherein the adsorbent regeneration tower comprises a tower body, a blanking component and a baffling component, an inner cavity of the tower body comprises a distributing section and a heating section positioned below the distributing section, the distributing section is positioned at the top of the inner cavity of the tower body, and the heating section is used for heating an adsorbent to enable the adsorbent to be desorbed and regenerated; the blanking component comprises a plurality of blanking pipes, the blanking component is arranged in the heating section, and the adsorbent entering the heating section from the material distribution section falls down through the blanking pipes; the baffle assembly is arranged in the heating section and comprises a plurality of baffles which are obliquely arranged relative to the axial direction of the blanking pipe, and the baffles are arranged in the heating section at intervals and used for guiding a heating medium to flow in the heating section so as to heat the adsorbent in the blanking pipe in the heating section to enable the adsorbent to desorb and regenerate. The adsorbent regeneration tower disclosed by the invention can reduce the flow resistance of a heat exchange medium and reduce the area of a flow dead zone.

Description

Adsorbent regeneration tower and low-temperature adsorption regeneration system

Technical Field

The invention belongs to the technical field of flue gas purification, and particularly relates to an adsorbent regeneration tower and a low-temperature adsorption regeneration system.

Background

The flue gas pollutant carbon-based adsorption removal technology can realize desulfurization and denitrification integration, and simultaneously remove unconventional pollutants such as SO3, heavy metals, VOCs and the like efficiently. The regeneration tower is one of key equipment of a flue gas pollutant carbon-based adsorption removal system and is used for regenerating the deactivated adsorbent after adsorbing pollutants so as to recover the activity and recycle.

In the related art, a vertical shell-and-tube type heat regeneration tower is adopted for regenerating an inactive adsorbent, the adsorbent passes through a tube side, a heat exchange medium passes through a shell side, a baffle is arranged on the shell side to change the flow path of the heat exchange medium, so that the heat exchange effect is improved, however, the baffle can enable the heat exchange medium to transversely and positively impact the inner wall of the regeneration tower and a material tube, so that the flow resistance of the heat exchange medium is high, the conveying power consumption of the heat exchange medium is high, the heat exchange medium is subjected to reciprocating baffling, a large flow dead zone exists near a baffling point, a large ineffective heat exchange zone is formed, and the heating consistency of the adsorbent is poor.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, the invention provides the adsorbent regeneration tower which can reduce the flow resistance of a heating medium, reduce the area of a flow dead zone and improve the regeneration effect.

The invention also provides a low-temperature adsorption regeneration system.

The adsorbent regeneration column of the present invention comprises:

the tower body comprises a material distribution section and a heating section positioned below the material distribution section, wherein the material distribution section is positioned at the top of the inner cavity of the tower body, and the heating section is used for heating the adsorbent to enable the adsorbent to be desorbed and regenerated;

the blanking assembly comprises a plurality of blanking pipes, the blanking assembly is arranged in the heating section, and the adsorbent entering the heating section from the distribution section falls down through the blanking pipes;

the baffle assembly is arranged in the heating section and comprises a plurality of baffle plates, the baffle plates are obliquely arranged relative to the axial direction of the blanking pipe, and the baffle plates are arranged in the heating section at intervals and used for guiding a heating medium to flow in the heating section so as to heat the adsorbent in the blanking pipe in the heating section to enable the adsorbent to be desorbed and regenerated.

According to the adsorbent regeneration tower, through the inclined baffle plates which are arranged at intervals, heating mediums can be obliquely rushed to the blanking pipes and the inner wall of the tower body, so that the flow resistance of the heating mediums is reduced, the flow time and the flow smoothness of the heating mediums are prolonged, and the conveying power consumption of the heating mediums is reduced.

Optionally, the inner cavity of the tower body further comprises a cooling section, the cooling section is located at the bottommost part of the inner cavity of the tower body, the blanking component and the baffle component are further arranged in the cooling section, the adsorbent after desorption and regeneration in the heating section enters the cooling section and falls through a blanking pipe in the cooling section, and a baffle plate in the cooling section is used for guiding a cooling medium to flow in the cooling section so as to cool the adsorbent in the blanking pipe in the cooling section.

According to the invention, the tower body is provided with the cooling section, so that the regenerated adsorbent exchanges heat with the cooling medium in the cooling section to reduce the temperature of the adsorbent, and the adsorbent is conveniently conveyed to adsorb and purify the flue gas. Preferably, the adsorbent can be cooled to a low temperature below room temperature, so that the low-temperature adsorbent can be directly conveyed into the adsorption tower for low-temperature adsorption of the flue gas, and cooling equipment for cooling the flue gas to the low temperature, such as a spray cooling tower, is not required to be additionally arranged, so that the number of equipment is reduced, and the cost is reduced. Of course, in the present invention, the adsorbent may not be cooled to a low temperature, but may be cooled to a temperature suitable for adsorption purification, and the flue gas may be cooled to a low temperature by low temperature adsorption in the adsorption tower.

Optionally, the inner cavity of the tower body further comprises a preheating section, the preheating section is arranged between the material distribution section and the heating section, the blanking component and the baffle component are further arranged in the preheating section, the adsorbent entering the preheating section from the material distribution section enters the preheating section and falls into the heating section through a blanking pipe in the preheating section, and a baffle plate in the preheating section is used for guiding a preheating medium to flow in the preheating section so as to preheat the adsorbent in the blanking pipe in the preheating section.

In the invention, the tower body is provided with the preheating section, so that the temperature of the adsorbent can be raised before the adsorbent enters the heating section, the temperature rise amplitude of the heating section on the adsorbent is reduced to balance the temperature difference of different areas in the whole heating section, the whole temperature in the heating section can be stably maintained within the temperature meeting the regeneration interval of the adsorbent, and compared with the prior art that the preheating section and the heating section are used as a whole for heating and raising the temperature of the adsorbent, the invention can improve the utilization ratio of the heat value of the whole preheating medium and the heating medium by more than 10 percent, and the baffle assemblies and blanking assemblies in the preheating section and the heating section have the same effect and are not repeated.

Optionally, the plurality of baffles of the baffle assembly are divided into a plurality of groups of baffle units, the plurality of groups of baffle units are arranged at intervals along a first direction, and the plurality of baffles in each group of baffle units are arranged at intervals along a second direction orthogonal to the first direction so as to guide corresponding media between two adjacent baffles to flow along the inclined direction of the baffles.

According to the invention, the baffle plates are grouped, so that the arrangement of the baffle plates can be carried out according to the positions of a plurality of groups of baffle plate units in the tower body, the uniformity of heat exchange medium, the factors which interfere the flow of the heat exchange medium and other various reasons, and the interval distance between the baffle plates of the same group of baffle plate units and the inclination angle of each baffle plate can be conveniently adjusted.

Optionally, the first direction is an axial direction of the blanking pipe, and a plurality of baffles in each group of baffle units are equally spaced and arranged in parallel.

According to the invention, the plurality of groups of baffle plate units are arranged at intervals along the axial direction of the blanking pipe, and the heat exchange medium is subjected to multi-stage direction changing and flow equalizing in the intervals divided by the plurality of groups of baffle plate units, so that the adsorbent sequentially passes through the plurality of intervals in the blanking pipe to complete uniform heat exchange, and meanwhile, the arrangement of the baffle plates is more convenient.

Optionally, in a plurality of said baffles in each set of baffle units, at least some of the baffles have a different direction of inclination than others;

or, the inclination directions of a plurality of baffles in each group of baffle units are the same, and the inclination directions of baffles in at least part of baffle units are different from those of baffles in other baffle units in the groups of baffle units.

In the invention, the inclination directions of a plurality of baffle plates positioned in the same baffle plate unit can be different, and a guiding space with variable opening and closing degrees is formed between two adjacent baffle plates with different inclination directions, so that heat exchange medium can be redistributed in the interval where the baffle plate units are positioned, and the balance of the heat exchange medium is improved; the heat exchange medium has opposite flow guiding directions after passing through different baffle plate units due to different inclination directions of the baffle plates in different baffle plate units, and the heat exchange medium has buffering spaces between two adjacent baffle plate units, so that no baffle opposite flushing and no flow dead zone are caused.

Optionally, the plurality of baffles in the baffle assembly are divided into a plurality of groups of baffle units, the plurality of groups of baffle units are arranged at intervals along the axial direction of the blanking pipe, and the baffles in the baffle units are arranged at intervals along the direction orthogonal to the axial direction of the blanking pipe and in parallel to guide the corresponding medium between two adjacent baffles to flow along the inclined direction of the baffles;

The arrangement direction of the baffle plates in at least two groups of baffle plate units is arranged in an included angle.

According to the invention, the arrangement directions of the baffle plates in at least two groups of baffle plate units form a certain included angle to guide the corresponding media between the adjacent two baffle plates to flow along the inclined directions of the baffle plates, so that the flowing direction of the heat exchange media is changed when the heat exchange media pass through different baffle plate units, the adsorbent in the same blanking pipe can be prevented from always exchanging heat with the same part of heat exchange media, and the fluidity of the heat exchange media is improved.

Optionally, the baffle units are at least three groups, and the arrangement directions of baffles in the at least three groups of baffle units form included angles to guide corresponding media to flow spirally along the axial direction of the blanking pipe.

According to the invention, the arrangement directions of the baffle plates in at least three groups of baffle plate units are arranged in an included angle, so that the advancing distance of the heat exchange medium can be prolonged, the fluidity of the heat exchange medium is improved, and the medium flows smoothly by means of the obliquely arranged baffle plates.

Optionally, the bottom surface of heating section is the inclined plane, be provided with the ash discharging portion on the heating section, the ash discharging portion is established in the low level end of heating section bottom surface is in order to discharge the debris that subsides in the heating section.

In the invention, the bottom surface of the inclined surface can be matched with the inclined baffle plate, so that sundries such as smoke dust in the heating medium slide down and gather together, the heating medium can contain impurities, the requirement on the cleanliness of the heating medium is reduced, and the optional range of the heating medium is enlarged.

The low-temperature adsorption regeneration system of the present invention comprises:

the adsorption tower is provided with a flue gas inlet and a flue gas outlet, low-temperature flue gas below room temperature enters the adsorption tower from the flue gas inlet so as to be adsorbed and purified by an adsorbent in the adsorption tower, and the flue gas subjected to adsorption and purification is discharged from the flue gas outlet;

the regeneration tower is the adsorbent regeneration tower, is connected with the adsorption tower and is used for regenerating the adsorbent which is discharged from the adsorption tower and is saturated in adsorption and sending the regenerated adsorbent back into the adsorption tower; and

and the cooling tower is connected with the adsorption tower and is used for cooling the flue gas into low-temperature flue gas below room temperature and conveying the low-temperature flue gas to a flue gas inlet of the adsorption tower.

The low-temperature adsorption regeneration system can reduce the flow resistance of a heating medium, reduce the area of a flow dead zone and improve the regeneration effect of the adsorbent. In addition, the low-temperature adsorption regeneration system can cool high-temperature flue gas, so that the high-temperature flue gas is cooled to below room temperature, the adsorbent in the adsorption tower is in contact with the flue gas in an environment below room temperature, low-temperature adsorption of the flue gas is realized, and compared with the activity of the adsorbent in the high-temperature environment, the activity of the adsorbent in the low-temperature adsorption condition below room temperature can be improved by tens or hundreds of times, so that the purification efficiency and effect of the flue gas are further improved, and near zero emission is realized.

Drawings

Fig. 1 is a schematic structural view of an adsorbent regeneration column according to an embodiment of the present invention.

FIG. 2 is a schematic illustration of the arrangement of baffle assemblies in a heating section in an embodiment of the present invention.

Fig. 3 is a schematic structural view of an adsorbent regeneration column according to another embodiment of the invention.

Fig. 4 is a schematic structural view of a heating section having an inclined surface as a bottom surface in an embodiment of the present invention.

Fig. 5 is a schematic structural view of an adsorbent unit in an embodiment of the present invention.

Reference numerals:

the tower body 1, the material distribution section 11, the preheating sections 12 and 121 are preheating inlets, the preheating outlet 122 is a preheating outlet, a heating section 13, a heating inlet 131, a heating outlet 132, an ash discharging part 133, a bottom surface 134, a cooling section 14, a cooling inlet 141 and a cooling outlet 142;

a blanking assembly 2 and a blanking pipe 21;

baffle assembly 3, baffle 31;

adsorbent 41, and gas-permeable casing 42.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

Referring to fig. 1 and 2, an adsorbent regeneration tower according to an embodiment of the present invention includes a tower body 1, a blanking assembly 2, and a baffle assembly 3, and an inner cavity of the tower body 1 includes a distribution section 11 and a heating section 13 located below the distribution section 11. The adsorbent entering the column 1 first enters the distribution section 11. Preferably, the inlet of the adsorbent is arranged at the top of the tower body 1, and the distributing section 11 is arranged at the top of the inner cavity of the tower body 1. The heating medium is introduced into the heating section 12, and the heating section 12 heats the adsorbent falling from the cloth section 11 through the heating medium so as to desorb and regenerate the adsorbent, thereby being convenient for reutilization of the adsorbent.

The blanking assembly 2 is arranged in the heating section 13 and comprises a plurality of blanking pipes 21, and the adsorbent entering the heating section 13 from the distribution section 11 is heated and falls through the blanking pipes 21. Preferably, the down pipe 21 is arranged in a vertical direction so that the adsorbent falls down.

The baffle assembly 3 is arranged in the heating section 13 and comprises a plurality of baffle plates 31, the baffle plates 31 are obliquely arranged relative to the axial direction of the blanking tube 21, the baffle plates 31 are arranged in the heating section 13 at intervals and used for guiding a heating medium to flow in the heating section 13 so as to heat the adsorbent in the blanking tube 21 in the heating section 13 to desorb and regenerate the adsorbent, and the heating medium can be a liquid medium or a gaseous medium, wherein the gaseous medium can adopt high-temperature steam, hot air, unpurified high-temperature flue gas, gas generated by a biomass burner or other high-temperature gas according to different heat sources.

Under the flow guiding effect of the baffle plates 31 which are obliquely arranged, the heating medium in the heating section 13 is enabled to obliquely flow towards the blanking pipe 21 and the inner wall of the heating section 13, so that the flow direction of the heating medium and the inner wall of the tower body 1 are inclined to a certain degree, the frontal impact on the inner wall of the tower body 1 is reduced, more heating medium can be smoothly changed under the effect of the baffle plates 31, the heating medium is guided to be dispersed in the cavity of the heating section 13, the direction changing is completed by impacting the inner wall of the tower body 1, the flow resistance of the heating medium is reduced, the flow time and the flow smoothness of the heating medium are prolonged, the conveying power consumption of the heating medium is reduced, in addition, the inclined baffle plates which are arranged at intervals can avoid the reciprocating baffle opposite flow and abrupt steering of the heating medium, the flow dead area is reduced, the flow of the heating medium is more uniform, the heating uniformity of the adsorbent in each blanking pipe is better, the overall heat transfer efficiency is high, and the desorption and regeneration quality of the adsorbent is improved.

The adsorbents in the blanking pipes 21 in the heating section 13 are desorbed and regenerated through heat exchange with the heating medium, and the flow guide of the inclined baffle plates 31 is more convenient for the heating medium to be further diffused in gentle flow under the guide of the baffle plates 31, so that sharp turning or mutual impact between the heating mediums is reduced, the flow dead area is reduced, the heating condition of the adsorbents in each blanking pipe 21 in the heating section 13 is balanced, and the desorption and regeneration effects and quality of the adsorbents are prevented from being insufficiently influenced by the heating of the adsorbents in the local blanking pipes 21.

Therefore, the adsorbent regeneration tower provided by the embodiment of the invention can enable the heating medium to obliquely flow towards the inner walls of the blanking pipe 21 and the heating section 13, the flow of the heating medium is smoother, the flow resistance of the heating medium is reduced, the heating medium can be more uniformly dispersed in the chamber, the area where the heating medium is suddenly turned is reduced, the back-and-forth baffling of the heating medium is avoided, the flow dead area is small, the effective heat exchange area is increased, and the regeneration effect is improved.

In some embodiments, the tower body 1 is provided with a heating inlet 131 and a heating outlet 132, the heating inlet 131 and the heating outlet 132 are respectively communicated with the heating section 13, and the heating medium enters the heating section 13 through the heating inlet 131, flows in the heating section 13 through the guide of the baffle plate 31, and is discharged through the heating outlet 132.

In some embodiments, the included angle between the baffle 31 and the axial direction of the blanking pipe may be 10 ° -80 °, and the inclination angle of the baffle 31 may be adjusted according to the flow direction, the uniformity of distribution, the kinetic energy intensity of the heating medium, and other parameters of the heating medium at different positions.

In some embodiments, the inner cavity of the tower body 1 further comprises a cooling section 14, the cooling section 14 is located at the bottommost part of the inner cavity of the tower body 1, the blanking assembly 2 and the baffle assembly 3 are further arranged in the cooling section 14, the adsorbent after desorption and regeneration in the heating section 13 enters the cooling section 14 and falls through a blanking pipe 21 in the cooling section 14, and a baffle 31 in the cooling section 14 is used for guiding the cooling medium to flow in the cooling section 14 so as to cool the adsorbent in the blanking pipe 21 in the cooling section 14.

Specifically, the tower body 1 is provided with a cooling inlet 141 and a cooling outlet 142, the cooling inlet 141 and the cooling outlet 142 are respectively communicated with the cooling section 14, a cooling medium enters the cavity of the cooling section 14 through the cooling inlet 141, is dispersed in the cavity of the cooling section 14 through the drainage of the baffle plate 31 in the cooling section 14, an adsorbent enters the blanking pipe 21 in the cooling section 14 after being heated and desorbed and regenerated by the heating section 13, and is discharged from the cooling outlet 142 after heat exchange between the cooling medium and the adsorbent in the blanking pipe 21 in the cooling section 14, and the cooled adsorbent is discharged for reuse by the adsorption tower.

Preferably, the adsorbent can be cooled to a low temperature below room temperature, so that the low-temperature adsorbent can be directly conveyed into the adsorption tower for low-temperature adsorption of the flue gas, and cooling equipment for cooling the flue gas to the low temperature, such as a spray cooling tower, is not required to be additionally arranged, so that the number of equipment is reduced, and the cost is reduced. Of course, in the embodiment of the invention, the adsorbent is not required to be cooled to a low temperature, and only the adsorbent is required to be cooled to a temperature suitable for adsorption purification, and the flue gas is subjected to low-temperature adsorption in the adsorption tower by cooling the flue gas to a low temperature.

It should be noted that, the arrangement of the baffles 31 in the cooling section 14 is similar to that of the baffles 31 in the heating section 13, that is, the baffles 31 in the cooling section 14 are inclined with respect to the axial direction of the blanking pipe 21, and a plurality of baffles 31 are disposed in the cooling section 14 at intervals so as to achieve the guiding of the cooling medium, and the effect obtained by the baffles 31 disposed in the cooling section 14 is the same as that obtained by the baffles 31 disposed in the heating section 13, so that the description thereof will not be repeated.

In some embodiments, the inner cavity of the tower body 1 further comprises a preheating section 12, the preheating section 12 is arranged between the material distribution section 11 and the heating section 13, the blanking component 2 and the baffle component 3 are further arranged in the preheating section 12, the adsorbent entering the preheating section 12 from the material distribution section 11 enters the preheating section 12 and falls into the heating section 13 through a blanking pipe 21 in the preheating section 12, and a baffle 31 in the preheating section 12 is used for guiding the preheating medium to flow in the preheating section 12 so as to preheat the adsorbent in the blanking pipe 21 in the preheating section 12.

It should be noted that, if the temperature of the adsorbent is too low when the adsorbent enters the heating section 13, the temperature range of the heating section 13 for heating the adsorbent is larger, and in the embodiment of the present invention, the baffle assembly 3 of the heating section 13 can improve the heat exchange effect of the heating medium and the adsorbent in the heating section 13 to solve the above problem to a certain extent, so that the temperature of the adsorbent is more controllable in the whole regeneration process flow in order to further optimize the regeneration tower, and therefore, the preheating section 12 is provided to preheat the adsorbent entering the heating section 13.

Specifically, the tower body is provided with a preheating inlet 121 and a preheating outlet 122, the preheating inlet 121 and the preheating outlet 122 are correspondingly communicated with each other in the preheating section 12, a preheating medium enters a cavity of the preheating section 12 through the preheating inlet 121, the preheating section 12 is used for preheating the adsorbent entering the heating section 13, the preheating medium is discharged from the preheating outlet 122 after exchanging heat with the adsorbent in the blanking pipe 21 in the preheating section 12, the preheating section can enable the adsorbent entering the heating section 13 to have a certain temperature, the temperature rising amplitude of the adsorbent in the heating section 13 is reduced to balance the temperature difference of different areas in the whole heating section, the heat load of the heating section 13 is relieved, and the whole temperature in the heating section can be stably maintained in a section temperature meeting the regeneration of the adsorbent.

In view of taking the preheating section and the heating section as a whole for heating the adsorbent, the arrangement of the baffle assembly 3 is matched, and compared with the process of heating the adsorbent only in the heating section in the related art, the embodiment of the invention can improve the utilization ratio of the heat value of the preheating medium and the heating medium by more than 20%.

The arrangement of the baffles 31 in the preheating section 12 is similar to the arrangement of the baffles 31 in the heating section 13 and the cooling section 14, i.e. the baffles 31 in the preheating section 12 are inclined with respect to the axial direction of the down pipe 21, and a plurality of baffles 31 are arranged in the preheating section 12 at intervals so as to achieve the guiding of the preheating medium, and the effect obtained by the baffles 31 arranged in the preheating section 12 is the same as the effect obtained by the baffles 31 arranged in the heating section 13 and the cooling section 14, so that the description thereof will not be repeated here.

In some embodiments, the plurality of baffles 31 of the baffle assembly 3 are divided into a plurality of groups of baffle units, the groups of baffle units being spaced apart along a first direction, the plurality of baffles 31 in each group of baffle units being spaced apart along a second direction orthogonal to the first direction to direct the flow of the respective medium between adjacent baffles 31 along the oblique direction of the baffles 31.

That is, in general, the first direction is used as the main flow direction of the heat exchange medium in the corresponding preheating section 12, heating section 13 or cooling section 14, and in the process of flowing the heat exchange medium along the first direction, the heat exchange medium is guided by the plurality of groups of baffle units arranged at intervals so as to perform flow equalization on the heat exchange medium passing through the corresponding baffle units, and the heat exchange medium is guided by the plurality of groups of baffle units, so that the adsorbent in the corresponding blanking pipe 21 is heated more uniformly, and the desorption regeneration effect is more uniform.

In an alternative embodiment, as shown in fig. 2, the first direction is the axial direction of the blanking pipe 21, and the baffles 31 in each set of baffle units are equally spaced and arranged in parallel.

It should be noted that, in the embodiment of the present invention, the parallel arrangement includes parallel arrangement, for example, when the baffle plates 31 are flat plates, the parallel arrangement of the plurality of baffle plates 31 is parallel arrangement, and when the baffle plates 31 are V-shaped plates, the parallel arrangement of the plurality of baffle plates 31 is parallel arrangement of the corresponding portions of the plurality of baffle plates 31.

That is, the plurality of baffles 31 in the same baffle unit are arranged in such a manner that the plurality of baffles 31 in the same baffle unit are parallel to each other, and the distances between adjacent two baffles 31 in the same baffle unit are also the same, that is, the plurality of baffles 31 in the same baffle unit are equally spaced and arranged in parallel.

As shown in fig. 1 and 2, the X direction in the drawing is the first direction, the Y direction is the second direction, the baffle plates 31 are of a flat plate structure with a length extending direction, taking the heating section 13 as an example, the heating inlet 131 of the heating section 13 is arranged on the lower side wall of the heating section 13, the heating outlet 132 of the heating section 13 is arranged on the upper side wall of the heating section 13, when the baffle assembly 3 is arranged, the axial direction of the blanking pipe 21 is taken as the first direction, the axial direction of the blanking pipe 21 is taken as the arrangement direction of the baffle plate units, the baffle plates 31 in the same baffle plate unit are all arranged in parallel, and the interval distance between two adjacent baffle plates 31 in the same baffle plate unit is the same, so that the heating medium in the plane orthogonal to the axial direction of the blanking pipe 21 in the heating section 13 is balanced, and the adsorbent in the blanking pipe 21 in the heating section 13 is heated more uniformly.

Optionally, whether the distances between two adjacent baffles 31 in different baffle units are the same or not may be adjusted according to practical situations, for example, taking the heating section 13 as an example, the inclination angle of the baffles in the baffle unit near the heating inlet 131 and the heating outlet 132 in the heating section 13 and the distance between the two adjacent baffles 31 are different from the inclination angle of the baffles in the baffle unit in the middle of the heating section 13 and the distance between the two adjacent baffles 31, so as to more effectively adjust the flow directions of the media near the heating inlet and the heating outlet 132, and reduce the influence of the flow directions of the media near the heating inlet 131 and the heating outlet 132 in the heating section 13 on the flow directions of the media in the middle of the heating section 13.

In an alternative embodiment, at least some of the baffles 31 in each set of baffle units have a different direction of inclination than the other baffles 31.

That is, the inclination directions of the plurality of baffle plates in the same baffle plate unit can be different, and a guiding space with variable opening and closing degree is formed between two adjacent baffle plates with different inclination directions, so that the heat exchange medium can be redistributed in the interval where the baffle plate units are positioned, and the balance of the heat exchange medium is improved

Alternatively, the plurality of baffles 31 in the baffle units may be arranged in such a manner that a plurality of baffles 31 in the same baffle unit are partially arranged in parallel, and the plurality of baffles 31 are sequentially arranged in the second direction in the W-shape, that is, the baffles 31 in odd positions in the same baffle unit are parallel to each other, and the baffles 31 in even positions are parallel to each other.

In an alternative embodiment, the plurality of baffles 31 in each set of baffle units are inclined in the same direction, and at least some of the baffles 31 in the plurality of sets of baffle units are inclined in a direction different from the direction of inclination of the baffles 31 in the other baffle units.

Alternatively, as one embodiment of the arrangement of the plurality of baffles 31 in the same baffle unit, a plurality of baffles 31 in the same baffle unit are arranged in parallel, the spacing distance between two adjacent baffles 31 in the same baffle unit is the same, and the inclination directions of the baffles 31 in two adjacent groups of baffle units are different to adjust the flow track of the heat exchange medium. The different baffle plate inclination directions in different baffle plate units enable the heat exchange medium to have opposite flow guiding directions after passing through the different baffle plate units, and the heat exchange medium has buffering space between two adjacent baffle plate units, so that no baffle opposite flushing and no flow dead zone are caused.

In some embodiments, the plurality of baffles 31 in the baffle assembly 3 are divided into a plurality of groups of baffle units, the plurality of groups of baffle units are arranged at intervals along the axial direction of the blanking pipe 21, the baffles 31 in the baffle units are arranged at intervals along the direction orthogonal to the axial direction of the blanking pipe 21 and in parallel to guide the corresponding medium between two adjacent baffles 31 to flow along the inclined direction of the baffles 31, and the arrangement directions of the baffles 31 in at least two groups of baffle units are arranged at an included angle.

That is, a plurality of baffle units are arranged along the axial direction of the blanking pipe 21, a plurality of baffles 31 in each baffle unit are arranged along the direction orthogonal to the axial direction of the blanking pipe 21, the inclination angles and directions of the plurality of baffles 31 in each baffle unit are the same, and the arrangement directions of the baffles 31 in at least two baffle units are arranged at a certain included angle to guide the corresponding medium between the adjacent baffles 31 to flow along the inclination directions of the baffles 31, so that the flowing direction of the heat exchange medium is changed when passing through different baffle units.

Taking a strip-shaped flat plate with a length extending direction as the baffle plate 31 as an example, the parallel arrangement direction of a plurality of baffle plates 31 in the baffle plate unit is orthogonal to the axial direction of the blanking pipe 21 and the length extending direction of the baffle plate 31, so as to ensure that the heat exchange medium between two adjacent baffle plates 31 can flow along the inclined direction of the baffle plate 31.

Alternatively, among the plurality of sets of baffle units, the baffles 31 in a part of the baffle units are all arranged at intervals along the a direction orthogonal to the axial direction of the blanking pipe 21, but the baffles 31 in the rest of the baffle units are arranged at intervals along the B direction in the plane orthogonal to the axial direction of the blanking pipe 21, and the included angle between the a direction and the B direction may be 10 ° -80 °, for example, the included angle between the a direction and the B direction may be 10 °, 25 °, 30 °, 57 ° or 80 °.

For example, taking the heating section 13 as an example, four groups of baffle units are arranged in the heating section 13, and a first baffle unit, a second baffle unit, a third baffle unit and a fourth baffle unit are sequentially arranged along the axial direction of the blanking pipe 21, wherein the arrangement directions of the baffles 31 in the first baffle unit, the second baffle unit and the third baffle unit are the same, and the arrangement direction of the baffles 31 in the fourth baffle unit forms an included angle of 30 °, 45 ° or 50 ° with the arrangement direction of the baffles 31 in the third baffle unit.

Further, in some alternative embodiments, the baffle units are arranged in at least three groups, wherein the arrangement direction of the baffles 31 in at least three groups of baffle units is arranged at an angle to guide the corresponding medium to flow spirally along the axial direction of the down pipe 21.

It should be noted that, as one baffle unit, a plurality of baffles 31 are used, at least three groups of baffles are arranged at intervals along the axial direction of the blanking pipe 21, baffles 31 in the baffle units are arranged at intervals along the direction orthogonal to the axial direction of the blanking pipe 21 and in parallel to guide the corresponding medium between two adjacent baffles 31 to flow along the inclined direction of the baffles 31, and by changing the arrangement direction of the baffles 31 to guide the heat exchange medium to flow in a spiral form along the axial direction of the blanking pipe 21, the distance traveled by the heat exchange medium can be prolonged, the medium flow is gentle by means of the inclined baffles 31, and the flow dead area is reduced.

In order to achieve spiral flow guiding of the heat exchange medium by the groups of baffle units, the arrangement direction of the baffles 31 in the next baffle unit is obtained by rotating the arrangement direction of the baffles 31 in the upper baffle unit around the axial direction of the blanking pipe 21, that is, the arrangement direction of the baffles 31 in one baffle unit is used as a reference, the arrangement direction of the baffles 31 in the baffle unit used as a reference is rotated clockwise or anticlockwise around the axial direction of the blanking pipe 21 by a certain angle to form the next baffle unit, and so on, so that the arrangement directions of the baffles 31 in at least three groups of baffle units are arranged at an included angle to guide the corresponding medium to flow spirally along the axial direction of the blanking pipe 21, and the included angle of the arrangement directions of the baffles 31 in the adjacent two baffle units can be selected in the range of 10 ° -80 °, for example, 10 °, 25 °, 30 °, 57 ° or 80 °.

Taking the heating section 13 as an example, three sets of baffle units are arranged in the heating section 13, and a first baffle unit, a second baffle unit and a third baffle unit are sequentially arranged along the axial direction of the blanking pipe 21, the second baffle unit is obtained by rotating the arrangement direction of the baffle 31 in the first baffle unit by 40 ° clockwise around the axial direction of the blanking pipe 21, and the third baffle unit is obtained by rotating the arrangement direction of the baffle 31 in the second baffle unit by 40 ° or 50 ° clockwise around the axial direction of the blanking pipe 21.

In some embodiments, a baffle 31 is attached to the down pipe 21, with a gap between the baffle 31 and the wall of the inner chamber.

That is, no dead angle which can not flow the heat exchange medium is formed between the baffle plate 31 and the inner wall of the inner cavity of the tower body, so that the gentle flow of the heat exchange medium can be more convenient, the flow dead area is reduced, the blanking pipe 21 can be supported by the baffle plate 31, the baffle plate 31 also has the function of radiating fins, and the heat exchange effect can be improved.

Optionally, according to the distribution of the baffle plate 31, through holes corresponding to the blanking pipe 21 are formed on the baffle plate 31, so that the blanking pipe 21 is penetrated on the baffle plate 31 during assembly, and the baffle plate 31 can be connected to the blanking pipe 21 through a connecting piece or welded.

In the above embodiment, the baffle plates 31 are arranged in a regular array, so that the installation of the baffle plates 31 is facilitated, and the effective guiding of the heat exchange medium and the simulation analysis of the dynamic gas flow are facilitated, so that the side resistance or the vortex formation of the heat exchange medium are reduced, and the adjustment difficulty of the baffle plates 31 is also reduced.

As shown in fig. 3 and 4, in some embodiments, the bottom surface 134 of the heating section 13 is an inclined surface, the heating section 13 is provided with an ash discharging part 133, and the ash discharging part 133 is provided at a lower end of the bottom surface 134 of the heating section 13 to discharge the impurities settled in the heating section 13.

When the heating medium entering the heating inlet 131 contains impurities such as smoke dust, for example, the heating medium is raw smoke gas, sedimentation occurs during the flowing process of the heating section 13, the smoke dust settled on the baffle plate 31 can slide to the bottom of the heating section 13 by means of the inclined baffle plate 31, and the smoke dust in the heating section 13 can be discharged from the ash discharging part 133 through the inclined bottom surface 134, so that the regeneration tower can work by adopting more heat sources, and the cost of the heat sources is reduced.

When the heating medium containing impurities such as smoke dust is adopted, the baffle plate is not only required to guide the heating medium, but also required to guide settled impurities to slide, so that the inclination angle of the baffle plate is required to be further optimized, the axial included angle between the baffle plate and the blanking pipe can be 10-55 degrees, and the inclination angle of the baffle plate is prevented from being too gentle.

The baffle plate in the embodiment of the invention can balance the two effects of guiding the heating medium, guiding the sundries such as smoke dust and the like to slide down, and when the guiding of the heating medium in the heating section is influenced because the baffle plate needs to meet the sliding down of the sundries such as the smoke dust and the like, the baffle plate is complemented by the structure of the regeneration tower with the preheating section, so that the regeneration tower realizes the improvement of the overall performance through the coordination and coordination of multiple dimensions.

Optionally, the ash discharging part 133 is an ash discharging port arranged on the heating section 13, the ash discharging port can be a circular opening or a strip-shaped notch, a gate valve is arranged on the ash discharging port, and when ash is required to be removed, the gate valve is opened to remove the ash.

Optionally, the bottom surface 134 of the heating section 13 is of an inclined flat plate structure or an inclined curved surface structure, when the bottom surface 134 of the heating section 13 is of an inclined curved surface structure, the settled sundries are gathered by means of the gathering effect of the curved surface of the bottom surface 134 of the heating section 13, and the gathered sundries are further gathered to an area close to the ash discharging part 133 by means of the inclination angle of the bottom surface 134 of the heating section 13, so that the sundries are conveniently discharged.

As shown in fig. 5, in the embodiment of the present invention, the adsorbent 41 may be a granular or powder adsorbent, or may be an adsorbent body made of a powder or granule adsorbent, for example, a spherical body or a cylindrical body formed by a powder or granule adsorbent through a binder, etc., and of course, a protective shell, for example, a gas permeable membrane covering the outside of the adsorbent body may be further formed on the outside of the adsorbent body, so as to enhance the strength of the adsorbent body. The adsorbents 41 may be filled in the ventilation casing 42 to form adsorbent units, wherein the ventilation casing 42 has ventilation holes through which flue gas may enter the ventilation casing 42, and the flue gas may pass through gaps between adjacent adsorbents 41 and/or holes of the adsorbents themselves, thereby not only reducing direct collision, frictional wear, and dust generation between the adsorbents. The ventilation shell can be in the shape of a sphere, a cylinder and other rotating bodies, wherein the diameter of the adsorption unit is 10mm-100mm, and the diameter of the adsorbent is 1mm-10mm.

The low temperature adsorption regeneration system according to the embodiment of the present invention is described below.

The low-temperature adsorption regeneration system comprises an adsorption tower, a regeneration tower and a cooling tower, wherein the adsorption tower is provided with a flue gas inlet and a flue gas outlet, flue gas enters the adsorption tower from the flue gas inlet and is contacted and adsorbed with an adsorbent in the adsorption tower, the flue gas after adsorption purification is discharged from the flue gas outlet, the regeneration tower is the adsorbent regeneration tower in the embodiment, the regeneration tower is connected with the adsorption tower and is used for regenerating the adsorbent with saturated adsorption discharged from the adsorption tower and sending the regenerated adsorbent back into the adsorption tower, and the cooling tower is connected with the adsorption tower and is used for cooling the flue gas to the flue gas inlet of the adsorption tower after the temperature is lower than room temperature.

The low-temperature adsorption regeneration system provided by the embodiment of the invention can reduce the flow resistance of a heating medium, reduce the area of a flow dead zone and improve the regeneration effect of the adsorbent. In addition, the low-temperature adsorption regeneration system can cool the high-temperature flue gas, so that the high-temperature flue gas is cooled to below room temperature, the adsorbent in the adsorption tower is contacted with the flue gas in an environment below room temperature, and compared with the activity of the adsorbent in the high-temperature environment, the activity of the adsorbent below room temperature can be improved by tens of times or hundreds of times, so that the purification efficiency and effect of the flue gas can be further improved, and near zero emission is realized.

The low temperature in the embodiment of the invention is below room temperature, preferably below zero degrees celsius, and more preferably between-20 ℃ and-10 ℃. The inventors found through researches that the lower the flue gas temperature is, the more favorable for adsorption purification, but the lower the flue gas temperature is, the complicated equipment structure for cooling the flue gas is caused, and the energy consumption is increased, for example, the cooling equipment, the adsorption tower and the pipeline are required to be provided with heat insulation layers, the sealing performance is required to be high, so that the cost is increased, and in addition, the condensed water is easy to appear in the adsorption tower under the condition of the too low temperature, so that the adsorption is influenced by the adhesion and blockage of the adsorbent. Therefore, it is advantageous to cool the flue gas temperature to-20℃to-10 ℃.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While the above embodiments have been shown and described, it should be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives, and variations of the above embodiments may be made by those of ordinary skill in the art without departing from the scope of the invention.

Claims (10)

1. An adsorbent regeneration column comprising:

the tower body comprises a material distribution section and a heating section positioned below the material distribution section, wherein the material distribution section is positioned at the top of the inner cavity of the tower body, and the heating section is used for heating the adsorbent to enable the adsorbent to be desorbed and regenerated;

The blanking assembly comprises a plurality of blanking pipes, the blanking assembly is arranged in the heating section, and the adsorbent entering the heating section from the distribution section falls down through the blanking pipes;

the baffle assembly is arranged in the heating section and comprises a plurality of baffle plates, the baffle plates are obliquely arranged relative to the axial direction of the blanking pipe, and the baffle plates are arranged in the heating section at intervals and used for guiding a heating medium to flow in the heating section so as to heat the adsorbent in the blanking pipe in the heating section to enable the adsorbent to be desorbed and regenerated.

2. The sorbent regeneration tower of claim 1, wherein the interior cavity of the tower body further comprises a cooling section, the cooling section is positioned at the bottommost portion of the interior cavity of the tower body, the blanking assembly and the baffle assembly are further positioned in the cooling section, the sorbent after desorption regeneration in the heating section enters the cooling section and falls through a blanking tube in the cooling section, and a baffle in the cooling section is used for guiding a cooling medium to flow in the cooling section to cool the sorbent in the blanking tube in the cooling section.

3. The sorbent regeneration tower of claim 2, wherein the interior cavity of the tower body further comprises a preheating section, the preheating section is disposed between the distribution section and the heating section, the blanking assembly and the baffle assembly are further disposed in the preheating section, the sorbent entering the preheating section from the distribution section enters the preheating section and falls into the heating section through a blanking pipe in the preheating section, and a baffle plate in the preheating section is used for guiding a preheating medium to flow in the preheating section to preheat the sorbent in the blanking pipe in the preheating section.

4. A sorbent regeneration column according to any one of claims 1 to 3, wherein the plurality of baffles of the baffle assembly are divided into a plurality of groups of baffle units, the plurality of groups of baffle units being spaced apart along a first direction, the plurality of baffles of each group of baffle units being spaced apart along a second direction orthogonal to the first direction to direct the flow of the respective media between adjacent baffles along the oblique direction of the baffles.

5. The sorbent regeneration column of claim 4, wherein the first direction is an axial direction of the down pipe, and wherein a plurality of baffles in each set of baffle units are equally spaced and arranged in parallel.

6. The sorbent regeneration column of claim 4, wherein at least some of the baffles in each set of baffle units have a direction of inclination that is different from the direction of inclination of the other baffles;

or, the inclination directions of a plurality of baffles in each group of baffle units are the same, and the inclination directions of baffles in at least part of baffle units are different from those of baffles in other baffle units in the groups of baffle units.

7. A sorbent regeneration column according to any one of claims 1 to 3, wherein a plurality of baffles in the baffle assembly are divided into a plurality of groups of baffle units, the plurality of groups of baffle units being arranged at intervals along the axial direction of the down pipe, the baffles in the baffle units being arranged at intervals in a direction orthogonal to the axial direction of the down pipe and in parallel to direct the flow of the respective medium between adjacent baffles in an oblique direction of the baffles;

the arrangement direction of the baffle plates in at least two groups of baffle plate units is arranged in an included angle.

8. The sorbent regeneration column of claim 7, wherein the baffle units are at least three groups, wherein baffles in at least three groups of baffle units are disposed at an angle to direct the respective media to flow helically along the axial direction of the down pipe.

9. The adsorbent regeneration tower of claim 1, wherein the bottom surface of the heating section is an inclined surface, an ash discharging portion is provided on the heating section, and the ash discharging portion is provided at a lower end of the bottom surface of the heating section to discharge the impurities settled in the heating section.

10. A cryogenic adsorption regeneration system, comprising:

the adsorption tower is provided with a flue gas inlet and a flue gas outlet, low-temperature flue gas below room temperature enters the adsorption tower from the flue gas inlet so as to be adsorbed and purified by an adsorbent in the adsorption tower, and the flue gas subjected to adsorption and purification is discharged from the flue gas outlet;

a regeneration tower, which is an adsorbent regeneration tower according to any one of claims 1 to 9, and is connected to the adsorption tower, and is used for regenerating the adsorbent discharged from the adsorption tower and returning the regenerated adsorbent into the adsorption tower; and

and the cooling tower is connected with the adsorption tower and is used for cooling the flue gas into low-temperature flue gas below room temperature and conveying the low-temperature flue gas to a flue gas inlet of the adsorption tower.