Flue gas purification device with integrated cooling and low-temperature adsorption functions

Abstract

The present invention relates to the technical field of flue gas adsorption purification and discloses a flue gas purification device with integrated cooling and low-temperature adsorption functions, comprising a housing, the inner cavity of which is divided into a first cavity, a second cavity, a third cavity, and a fourth cavity arranged in sequence in a horizontal direction, the first cavity having a flue gas inlet, the fourth cavity having a flue gas outlet, the first cavity being provided with a cooling assembly for cooling the flue gas to be purified supplied from the flue gas inlet to the first cavity, the third cavity being provided with an adsorbent for low-temperature adsorption purification of the cooled low-temperature flue gas entering the third cavity from the first cavity through the second cavity into clean flue gas, the clean flue gas entering the fourth cavity from the third cavity and being discharged through the flue gas outlet. The present invention integrates the cooling and low-temperature adsorption processes of the flue gas in a single tower, thereby reducing floor space, construction costs, and the transportation distance of the flue gas, thereby reducing cooling loss, improving flue gas purification efficiency, and reducing energy consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of flue gas purification, and in particular to a flue gas purification device integrating cooling and low-temperature adsorption functions. Background Art

[0002] There are a large number of pollutants in the coal-fired flue gas and incineration flue gas emitted by steel mills, power plants, etc., which are harmful to the atmospheric environment and human health. Therefore, before the flue gas is discharged, the pollutants in the flue gas need to be removed so that it meets the emission standards before it can be discharged into the atmospheric environment. In the relevant technologies, flue gas pollutant removal technologies include bag dust removal, electrostatic dust removal, limestone gypsum wet desulfurization, selective catalytic reduction (SCR) denitrification, non-selective catalytic reduction (SNCR) and denitrification furnace calcium injection desulfurization. This type of pollutant removal technology removes each type of pollutant one by one, and the process is complicated. In the relevant technologies, it is also proposed to use adsorbents to remove pollutants in the flue gas in an integrated manner. The high-temperature flue gas discharged from the boiler is usually cooled to about 200°C and then sent to the adsorption tower for high-temperature adsorption. However, there is a problem of poor adsorption effect, resulting in a high content of pollutants in the flue gas, which still cannot be directly discharged. Summary of the Invention

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

[0004] Related technologies have proposed integrated low-temperature flue gas pollutant removal technology. This involves cooling the flue gas to below room temperature through a spray tower, then transferring the cooled flue gas to an adsorption tower for adsorption. While this type of pollutant removal technology can achieve integrated removal of multiple pollutants from flue gas, it still requires a large amount of equipment, resulting in a complex system, a large footprint, and high costs.

[0005] Furthermore, during flue gas transportation, the connections and layout between equipment take up considerable space, and the pipeline transportation process is time-consuming, resulting in reduced removal efficiency for the entire system. Furthermore, ambient temperature affects the temperature of the flue gas during pipeline transportation, causing cooling loss and thus reducing the removal effect. Therefore, the pipelines also require insulation, further increasing costs.

[0006] The present invention aims to at least partially address one of the technical problems in the related art. To this end, embodiments of the present invention provide a flue gas purification device with integrated cooling and cryogenic adsorption functions. The device integrates flue gas cooling and cryogenic adsorption within a single tower, saving space and reducing costs.

[0007] The flue gas purification device with integrated cooling and low-temperature adsorption functions of the present invention includes a shell, the inner cavity of the shell is divided into a first cavity, a second cavity, a third cavity and a fourth cavity arranged in sequence along the horizontal direction, the first cavity has a flue gas inlet, the fourth cavity has a flue gas outlet, a cooling component is provided in the first cavity, the cooling component is used to cool the flue gas to be purified supplied from the flue gas inlet to the first cavity into low-temperature flue gas with a sub-zero temperature, the third cavity has an adsorbent, which is used to purify the cooled low-temperature flue gas entering the third cavity from the first cavity through the second cavity into clean flue gas by low-temperature adsorption, and the clean flue gas enters the fourth cavity from the third cavity and is discharged through the flue gas outlet.

[0008] Compared with the flue gas purification method in the related art in which a separate spray tower is set up to cool the flue gas, and then the flue gas is transported to the adsorption tower through a pipeline for adsorption purification, the flue gas purification device of the present invention integrates cooling and low-temperature adsorption functions. The cooling and low-temperature adsorption processes of the flue gas are integrated in a single tower, which reduces the footprint and reduces the construction cost.

[0009] In the related art, flue gas cooled by a separate spray tower is transported to the adsorption tower via pipelines, resulting in long transport distances and cooling losses. The flue gas purification device of the present invention integrates cooling and low-temperature adsorption functions. The cooled low-temperature flue gas enters the adsorption chamber directly, reducing transport distance, time, and flue gas removal efficiency. It also avoids cooling losses during pipeline transport and reduces energy consumption.

[0010] Optionally, the smoke inlet is adjacent to the bottom of the first cavity, and the smoke outlet is adjacent to the top of the fourth cavity.

[0011] Optionally, the density of the air inlet holes on the cavity wall of the third cavity adjacent to the second cavity gradually increases from top to bottom, and the density of the air outlet holes on the cavity wall of the third cavity adjacent to the fourth cavity gradually decreases from top to bottom.

[0012] Optionally, a vertically arranged demister is provided in the second cavity for removing moisture from the cooled flue gas entering the second cavity from the first cavity.

[0013] Optionally, a partition wall, a first adsorption shell plate and a second adsorption shell plate are provided in the inner cavity of the shell, the partition wall is located between the first cavity and the third cavity, the second cavity is located between the partition wall and the first adsorption shell plate, the third cavity is located between the first adsorption shell plate and the second adsorption shell plate, and the fourth cavity is located between the second adsorption shell plate and the inner wall of the shell.

[0014] Optionally, the cooling assembly includes a spray cooling component, which is used to spray coolant to directly cool the flue gas to be purified in the first cavity. The height of the spray cooling component is higher than the height of the flue gas inlet. The first cavity is also provided with a filler located between the flue gas inlet and the spray cooling component.

[0015] Optionally, a grid portion is provided between the first cavity and the second cavity, and the grid portion is used to allow the cooled flue gas to be purified to enter the second cavity and block the coolant sprayed by the spraying component from entering the second cavity.

[0016] The flue gas purification device of the present invention integrates cooling and low-temperature adsorption functions. A grid is set to prevent the coolant sprayed by the spray component from entering the third chamber, and a demister is set in the second chamber to remove moisture from the cooled flue gas entering the second chamber from the first chamber, thereby preventing moisture from entering the third chamber and causing the adsorbent to stick and clog, especially for low-temperature adsorption in a low-temperature environment, thereby improving the adsorption effect of the adsorbent.

[0017] Optionally, the cooling assembly includes a condenser for indirectly cooling the flue gas to be purified in the first chamber.

[0018] Optionally, the condenser is an S-shaped, spiral or vortex-shaped cooling tube.

[0019] Optionally, the third chamber has an adsorbent inlet at the top and an adsorbent outlet at the bottom, so that the adsorbent is continuously or intermittently supplied into the third chamber from the adsorbent inlet and continuously or intermittently flows out of the third chamber from the adsorbent outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of a flue gas purification device integrating cooling and low-temperature adsorption functions according to an embodiment of the present invention.

[0021] Figure 2 It is a top view of a flue gas purification device with integrated cooling and low-temperature adsorption functions according to an embodiment of the present invention.

[0022] Figure 3 Schematic diagram of an adsorption unit of a flue gas purification device integrating cooling and low-temperature adsorption functions according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] Shell 11, flue gas inlet 101, flue gas outlet 102, first chamber 103, second chamber 104, third chamber 105, adsorption unit 1051, breathable shell 10511, adsorbent particles 10512, fourth chamber 106, coolant outlet 107, adsorbent inlet 108, adsorbent outlet 109,

[0025] Demisting device 21, partition wall 22, grille portion 221, first adsorption shell plate 23, second adsorption shell plate 24,

[0026] The components 31 and the filler 32 are spray-cooled. DETAILED DESCRIPTION

[0027] The 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.

[0028] The following describes a flue gas purification device with integrated cooling and low-temperature adsorption functions according to an embodiment of the present invention with reference to the accompanying drawings.

[0029] like Figures 1 to 3 As shown, the flue gas purification device with integrated cooling and low-temperature adsorption functions of an embodiment of the present invention includes a shell 11, the inner cavity of the shell 11 is divided into a first cavity 103, a second cavity 104, a third cavity 105 and a fourth cavity 106 arranged in sequence along the horizontal direction, the first cavity 103 has a flue gas inlet 101, and the fourth cavity 106 has a flue gas outlet 102.

[0030] A cooling component is provided in the first chamber 103, which is used to cool the flue gas to be purified supplied from the flue gas inlet 101 to the first chamber 103 to a low-temperature flue gas having a sub-zero temperature. An adsorbent is provided in the third chamber 105, which is used to purify the cooled low-temperature flue gas entering the third chamber 105 from the first chamber 103 through the second chamber 104 by low-temperature adsorption into clean flue gas. The clean flue gas enters the fourth chamber 106 from the third chamber 105 and is discharged through the flue gas outlet 102.

[0031] Preferably, the temperature of the low-temperature flue gas is, for example, -80°C to -5°C.

[0032] More preferably, the low-temperature flue gas temperature is -20°C to -10°C. The inventors have discovered through research that the lower the flue gas temperature, the more beneficial it is for adsorption purification. However, too low a flue gas temperature complicates the structure of the flue gas cooling equipment and increases energy consumption. For example, insulation layers are required for the cooling equipment, adsorption tower, and pipelines, requiring high sealing performance, which increases costs. Furthermore, excessively low temperatures can easily lead to condensation in the adsorption tower, causing the adsorbent to stick and clog, affecting adsorption. Therefore, cooling the flue gas to a temperature of -20°C to -10°C is advantageous.

[0033] In the embodiment of the present invention, Figure 3As shown, the adsorbent can be loaded into the breathable shell 10511 to form the adsorption unit 1051. The adsorbent can be a granular or powdered adsorbent, or an adsorbent body made of powder or granular adsorbent, such as a sphere or cylinder formed by a powder or granular adsorbent through a binder. Of course, a protective layer can be further provided on the outside of the adsorbent body, such as a breathable film covering the outside of the adsorbent body to improve the strength of the adsorbent body. The breathable shell 10511 has air holes, and the flue gas can enter the breathable shell 10511 through the air holes. The flue gas can pass through the gaps between adjacent adsorbents and / or the holes in the adsorbent itself, thereby reducing direct collisions, friction and wear between adsorbents, and the generation of dust. The breathable shell 10511 can be in the shape of a rotating body such as a sphere or a cylinder. Optionally, the diameter of the adsorption unit 1051 is 10mm-100mm, and the diameter of the adsorbent particles 10512 is 1mm-10mm.

[0034] By placing the adsorbent in the breathable shell 10511 to form the adsorption unit 1051, on the one hand, the dust generated by the collision between the adsorbents can be reduced; on the other hand, it is beneficial to increase the contact area between the flue gas and the adsorbent and improve the air permeability of the adsorbent, which is particularly beneficial for low-temperature adsorption.

[0035] It should be understood that the flue gas supplied to the first chamber 103 through the flue gas inlet 101 is flue gas containing pollutants to be purified, and the flue gas discharged from the third chamber 105 and entering the fourth chamber 106 is clean flue gas with pollutants removed.

[0036] For example, the flue gas inlet 101 of the housing 11 is connected to the outlet of a boiler (e.g., in a power plant or steel mill) to transport high-temperature flue gas to be purified into the housing 11 for cooling and low-temperature adsorption purification. The flue gas outlet 102 of the housing 11 can be connected to a chimney to discharge clean flue gas that meets standards directly into the atmosphere through the chimney, thereby achieving near-zero emissions. The flue gas outlet 102 of the housing 11 can also be connected to a cold recovery device (such as a cold recovery tower) to further utilize the cold energy in the clean flue gas.

[0037] Alternatively, as Figure 1 As shown, from left to right, there are the first cavity 103 , the second cavity 104 , the third cavity 105 and the fourth cavity 106 , the smoke inlet 101 is located on the cavity wall on the left side of the first cavity 103 , and the smoke outlet 102 is located on the cavity wall on the right side of the fourth cavity 106 .

[0038] The flue gas to be purified enters the first chamber 103 from the flue gas inlet 101, and is cooled to a sub-zero temperature range, preferably -20°C to -15°C, by a cooling component. The cooled flue gas to be purified flows rightward into the second chamber 104, and enters the third chamber 105 through the second chamber 104. The adsorbent in the third chamber 105 removes pollutants from the cooled flue gas to be purified, and purifies it into clean flue gas by low-temperature adsorption. The clean flue gas flows into the fourth chamber 106 and is discharged from the shell 11 through the flue gas outlet 102.

[0039] Thus, the cooling and low-temperature adsorption purification process of the flue gas is completed in the flue gas purification device with integrated cooling and low-temperature adsorption functions in the embodiment of the present invention.

[0040] It should be understood that in the low-temperature environment of the sub-zero temperature zone, the nitrogen oxides in the flue gas undergo low-temperature oxidation and adsorption on the surface of adsorbents such as activated carbon, oxidizing the difficult-to-adsorb nitric oxide gas into easily adsorbed nitrogen dioxide gas, achieving a hundreds-fold increase in adsorption capacity. In addition, the adsorption capacity of components such as sulfur dioxide, carbon dioxide and heavy metals also increases exponentially in low-temperature environments.

[0041] Since the flue gas to be purified, which is transported from the boiler to the first chamber 103, has a relatively high flow rate, the flue gas slows down to a certain extent during the cooling process in the first chamber 103. However, the flow rate of the flue gas after cooling is still relatively high. If it enters the third chamber 105 directly, it will not only impact the adsorbent and damage it, but also shorten the adsorption time of the flue gas in the third chamber 105, resulting in poor pollutant removal. Therefore, by providing the second chamber 104 between the first chamber 103 and the third chamber 105, the flue gas cooled in the first chamber 103 first flows into the second chamber 104 for buffering, slowing down the flow rate of the flue gas, and then flows into the third chamber 105 for adsorption purification, thereby improving the removal of pollutants from the flue gas.

[0042] In order to facilitate the collection of the clean flue gas flowing out of the third chamber 105 , a fourth chamber 106 is provided on the right side of the third chamber 105 , so that the clean flue gas is integrated in the fourth chamber 106 and discharged through the flue gas outlet 102 .

[0043] In summary, compared with the flue gas purification method in the related art in which the flue gas is cooled in a separate spray tower and then transported to an adsorption tower through a pipeline for adsorption purification, the flue gas purification device of the embodiment of the present invention integrates cooling and low-temperature adsorption functions, and integrates the cooling and low-temperature adsorption processes of the flue gas in a single tower, thereby reducing the floor space by 5%-20% and reducing construction costs.

[0044] The flue gas purification device, which integrates cooling and low-temperature adsorption functions, reduces the transport distance by at least one spray tower height, saving time and improving flue gas removal efficiency. It also avoids the problem of flue gas cooling loss during pipeline transportation, thereby enhancing the flue gas removal effect. Furthermore, by eliminating the need for pipelines, valves, and elbows, it further saves space and reduces costs.

[0045] Optionally, the ratio of the sum of the volumes of the second chamber, the third chamber and the fourth chamber to the volume of the first chamber can be 3:2, so that the flue gas cooled in the first chamber can be completely filled into the second chamber, the third chamber and the fourth chamber, leaving a margin, to avoid a sudden increase in the amount of flue gas delivered by the boiler, which would cause a sudden increase in pressure in the entire device and pose a safety hazard.

[0046] In some embodiments, as Figure 1 As shown, a partition wall 22, a first adsorption shell plate 23 and a second adsorption shell plate 24 are provided in the inner cavity of the shell 11. The partition wall 22 is located between the first cavity 103 and the third cavity 105. The second cavity 104 is located between the partition wall 22 and the first adsorption shell plate 23. The third cavity 105 is located between the first adsorption shell plate 23 and the second adsorption shell plate 24. The fourth cavity 106 is located between the second adsorption shell plate 24 and the inner wall of the shell 11.

[0047] In other words, if Figure 1 As shown, the partition wall 22, the first adsorption shell plate 23 and the second adsorption shell plate 24 are spaced apart in sequence from left to right to divide the inner cavity of the shell 11 into a first cavity 103, a second cavity 104, a third cavity 105 and a fourth cavity 106 from left to right.

[0048] In some embodiments, as Figure 1 As shown, the flue gas inlet 101 is adjacent to the bottom of the first chamber 103, and the flue gas outlet 102 is adjacent to the top of the fourth chamber 106. That is, after the flue gas to be purified enters the first chamber 103 through the flue gas inlet 101, it flows from bottom to top within the first chamber 103. The clean flue gas flowing from the third chamber 105 into the fourth chamber 106 then flows from bottom to top within the fourth chamber 106.

[0049] In some embodiments, as Figure 1 As shown, the cooling assembly includes a spray cooling component 31, which is used to spray coolant to directly cool the flue gas to be purified in the first chamber 103. The height of the spray cooling component 31 is higher than the height of the flue gas inlet 101 to avoid ineffective spraying of the spray cooling component 31.

[0050] Optionally, a filler 32 is further provided in the first chamber 103 between the flue gas inlet 101 and the spray cooling component 31. It is understood that within the first chamber 103, the flue gas flows from bottom to top through the filler 32, and the coolant sprayed by the spray cooling component 31 flows from top to bottom through the filler 32. The flue gas exchanges heat with the coolant in the filler 32, thereby reducing the flue gas temperature to a set sub-zero temperature range.

[0051] The first chamber 103 also has a coolant outlet 107. The coolant sprayed by the spray cooling component 31 falls to the bottom of the first chamber 103 and is discharged out of the tower through the coolant outlet 107. The coolant outlet 107 is located below the flue gas inlet 101 to prevent the coolant accumulated at the bottom of the first chamber 103 from flowing into the flue gas inlet 101.

[0052] The partition wall 22 is provided with a grille portion 221, which is used to allow the cooled flue gas to be purified to enter the second chamber 104 and block the coolant sprayed by the spray component from entering the second chamber 104, thereby preventing the coolant from entering the third chamber 105 and affecting the adsorption effect of the adsorbent.

[0053] Optionally, the first chamber 103 may include a multi-stage spray cooling component 31. For example, a partition is provided within the first chamber 103 to divide the first chamber 103 from bottom to top into a first-layer spray chamber and a second-layer spray chamber. The first-layer spray chamber is provided with a first-stage spray cooling component, and the second-layer spray chamber is provided with a second-stage spray cooling component. The partition is provided with a ventilation component for allowing flue gas to enter the second-layer spray chamber from the first-layer spray chamber and preventing coolant sprayed by the second-layer spray cooling component from entering the first-layer spray chamber. The partition is also provided with a liquid collection tank for collecting coolant sprayed by the second-layer spray cooling component. The flue gas inlet 101 is connected to the first-layer spray chamber, the grille portion 221 corresponds to the position of the second-layer spray chamber, and the filler 32 is provided in the second-layer spray chamber.

[0054] It is understood that after the flue gas to be purified enters the first chamber 103, it passes through the first and second spray chambers in sequence for step-by-step cooling, causing its temperature to drop to a sub-zero temperature range. The cooled flue gas to be purified then flows through the grille portion 221 into the second chamber 104. Thus, by performing step-by-step cooling on the flue gas, energy consumption is reduced.

[0055] In other embodiments, the cooling component includes a condenser to indirectly cool the flue gas to be purified in the first chamber 103 .

[0056] Optionally, the condenser is an S-shaped, spiral or vortex-shaped heat exchange tube arranged in the first cavity 103, and a cooling medium is passed into the heat exchange tube so that the flue gas contacts the heat exchange tube for indirect cooling.

[0057] In some embodiments, as Figure 1As shown, a demister 21 is provided in the second chamber 104 in a vertical direction for removing moisture from the cooled flue gas entering the second chamber 104 from the first chamber 103, thereby preventing the moisture in the flue gas from causing the adsorbent in the third chamber 105 to adhere, thereby improving the adsorption effect of the adsorbent.

[0058] In some embodiments, the first adsorption shell plate 23 is provided with a first ventilation portion for the cooled flue gas to be purified to pass through, and the second adsorption shell plate 24 is provided with a second ventilation portion for the clean flue gas to pass through, and the size of the first ventilation portion and the second ventilation portion are both smaller than the size of the adsorbent in the third cavity 105, which is used to prevent the adsorbent from flowing out through the first ventilation portion and the second ventilation portion.

[0059] For example, the first ventilation portion is composed of multiple air inlet holes, and the density of the air inlet holes on the first adsorption shell plate 23 gradually increases from top to bottom. If the air inlet holes on the first adsorption shell plate 23 are evenly distributed from top to bottom, the majority of the flue gas passing through the grille portion 221 enters the third chamber 105 directly through the air inlet holes in the upper portion of the first adsorption shell plate 23, while a smaller portion enters the third chamber 105 through the air inlet holes in the lower portion of the first adsorption shell plate 23. This results in uneven use of the adsorbent in the third chamber 105 and reduces adsorbent utilization. Therefore, the number of air inlet holes in the upper portion of the first adsorption shell plate 23 is smaller than the number of air inlet holes in the lower portion of the first adsorption shell plate 23, thereby limiting the amount of smoke passing through the upper portion of the first adsorption shell plate 23 and allowing the flue gas to flow downward and pass through the air inlet holes in the lower portion of the first adsorption shell plate 23, thereby improving adsorbent utilization.

[0060] The second ventilation portion is composed of a plurality of air outlet holes, and the density of the air outlet holes on the second adsorption shell plate 24 gradually decreases from top to bottom, so as to increase the adsorption time of the smoke in the third cavity 105 and improve the adsorption effect.

[0061] In some embodiments, as Figure 1 As shown, the third chamber 105 has an adsorbent inlet 108 at the top and an adsorbent outlet 109 at the bottom, so that the adsorbent is continuously or intermittently supplied into the third chamber 105 from the adsorbent inlet 108 and continuously or intermittently flows out of the third chamber 105 from the adsorbent outlet 109 .

[0062] Optionally, the adsorbent inlet 108 and the adsorbent outlet 109 are both provided with control valves to control the on-off of the adsorbent inlet 108 and the adsorbent outlet 109, thereby determining whether the adsorbent in the third chamber 105 flows continuously or intermittently according to actual working conditions, that is, the adsorbent forms a continuous or intermittent moving adsorbent bed in the third chamber 105.

[0063] When the adsorbent flows continuously, the control valves of the adsorbent inlet 108 and the adsorbent outlet 109 are in an open state, and the adsorbent is continuously supplied into the third chamber 105 from the adsorbent inlet 108 and continuously discharged from the third chamber 105 from the adsorbent outlet 109 .

[0064] During intermittent adsorbent flow, the control valve of the adsorbent inlet 108 is open, and the control valve of the adsorbent outlet 109 is closed. The adsorbent enters the third chamber 105 from the adsorbent inlet 108 and moves downward along the wall of the third chamber 105. After filling the third chamber 105, the control valve of the adsorbent inlet 108 is closed. After the adsorbent is saturated with adsorption, the control valve of the adsorbent outlet 109 is opened, and the adsorbent is discharged from the third chamber 105 through the adsorbent outlet 109.

[0065] In the description of the present invention, it should 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" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0067] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0068] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0069] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" 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 expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0070] Although the above embodiments have been shown and described, it is understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those skilled in the art are all within the scope of protection of the present invention.

Claims

1. A flue gas purification device integrating cooling and low-temperature adsorption functions, characterized in that: The invention comprises a shell, the inner cavity of the shell is divided into a first cavity, a second cavity, a third cavity and a fourth cavity arranged in sequence along the horizontal direction, the first cavity has a flue gas inlet, the fourth cavity has a flue gas outlet, a cooling component is provided in the first cavity, the cooling component is used to cool the flue gas to be purified supplied from the flue gas inlet to the first cavity into low-temperature flue gas with a sub-zero temperature, the third cavity has an adsorbent, which is used to purify the cooled low-temperature flue gas entering the third cavity from the first cavity through the second cavity into clean flue gas by low-temperature adsorption, the clean flue gas enters the fourth cavity from the third cavity and is discharged through the flue gas outlet, the density of the air inlet holes on the cavity wall of the third cavity adjacent to the second cavity gradually increases from top to bottom, and the density of the air outlet holes on the cavity wall of the third cavity adjacent to the fourth cavity gradually decreases from top to bottom.

2. The flue gas purification device with integrated cooling and low-temperature adsorption functions according to claim 1 is characterized in that: The smoke inlet is adjacent to the bottom of the first chamber, and the smoke outlet is adjacent to the top of the fourth chamber.

3. The flue gas purification device with integrated cooling and low-temperature adsorption functions according to claim 1 is characterized in that: A demister arranged vertically is provided in the second chamber for removing moisture from the cooled flue gas entering the second chamber from the first chamber.

4. The flue gas purification device with integrated cooling and low-temperature adsorption functions according to claim 1 is characterized in that: A partition wall, a first adsorption shell plate and a second adsorption shell plate are provided in the inner cavity of the shell. The partition wall is located between the first cavity and the third cavity, the second cavity is located between the partition wall and the first adsorption shell plate, the third cavity is located between the first adsorption shell plate and the second adsorption shell plate, and the fourth cavity is located between the second adsorption shell plate and the inner wall of the shell.

5. The flue gas purification device with integrated cooling and low-temperature adsorption functions according to any one of claims 1 to 4, characterized in that: The cooling assembly includes a spray cooling component, which is used to spray coolant to directly cool the flue gas to be purified in the first cavity. The height of the spray cooling component is higher than the height of the flue gas inlet. The first cavity is also provided with a filler located between the flue gas inlet and the spray cooling component.

6. The flue gas purification device with integrated cooling and low-temperature adsorption functions according to claim 5 is characterized in that: A grid portion is provided between the first cavity and the second cavity, and the grid portion is used to allow the cooled flue gas to be purified to enter the second cavity and to block the coolant sprayed by the spraying component from entering the second cavity.

7. The flue gas purification device with integrated cooling and low-temperature adsorption functions according to any one of claims 1 to 4, characterized in that: The cooling assembly includes a condenser for indirectly cooling the flue gas to be purified in the first cavity.

8. The flue gas purification device with integrated cooling and low-temperature adsorption functions according to claim 7 is characterized in that: The condenser is an S-shaped, spiral or vortex-shaped cooling tube.

9. The flue gas purification device with integrated cooling and low-temperature adsorption functions according to claim 1, characterized in that: The third chamber has an adsorbent inlet at the top and an adsorbent outlet at the bottom, so that the adsorbent is continuously or intermittently supplied into the third chamber from the adsorbent inlet and continuously or intermittently flows out of the third chamber from the adsorbent outlet.

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