CN117282227B - Low-temperature flue gas adsorption tower with flue gas mixing function and low-temperature flue gas adsorption system - Google Patents

Abstract

The invention relates to the technical field of flue gas adsorption and purification and discloses a low-temperature flue gas adsorption tower with a flue gas mixing function and a low-temperature flue gas adsorption system. The low-temperature flue gas adsorption tower with a flue gas mixing function includes a tower body and an adsorption layer. , interlayer components and spoiler components. The interlayer components are arranged in the tower body to form a flue gas mixing space in the adsorption layer. The interlayer components have adsorbent flow channels and multiple flue gas through holes, and enter the flue gas mixing space. The flue gas flows into the adsorption layer above the flue gas mixing space through the flue gas through hole. The spoiler component is connected with the flue gas mixing space and is used to disturb the flue gas in the flue gas mixing space so that the flue gas in the flue gas mixing space well mixed. The low-temperature flue gas adsorption tower according to the embodiment of the present invention can mix the flue gas in stages to improve the uniformity of flue gas distribution on the same horizontal plane and improve the flue gas adsorption and purification effect.

Description

Low-temperature flue gas adsorption tower and low-temperature flue gas adsorption system with flue gas mixing function

Technical field

The invention relates to the technical field of flue gas adsorption and purification, and specifically relates to a low-temperature flue gas adsorption tower and a low-temperature flue gas adsorption system with a flue gas mixing function.

Background technique

Coal combustion flue gas contains a large number of pollutants and needs to be purified before being discharged. In related technologies, an adsorption bed is usually arranged in an adsorption tower to adsorb pollutants in the flue gas. The flue gas enters the tower body through the flue gas inlet of the adsorption tower. The flue gas is purified after flowing through the adsorption bed, and is purified by the flue gas. Exit discharge. Traditionally, flue gas adsorption and purification is usually high-temperature adsorption, that is, the flue gas discharged from the boiler is cooled to approximately 200°C through a cooling tower, and then enters the adsorption tower for high-temperature adsorption and purification. High-temperature adsorption has the problems of high adsorbent consumption, poor adsorption effect, high nitrogen oxide content in the clean flue gas after adsorption, and the inability to achieve near-zero emissions.

Contents of the invention

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

In order to overcome the problem of high-temperature adsorption, related technologies have proposed low-temperature flue gas adsorption technology, which cools the flue gas into low-temperature flue gas such as below room temperature, and then removes pollutant components in the flue gas through adsorption. In low-temperature adsorption, the adsorption capacity of the adsorbent increases exponentially in low-temperature environments. Compared with conventional high-temperature flue gas adsorption, the adsorption purification rate is greatly improved, and near-zero emission of flue gas can be achieved. However, the inventor realized through research that compared with conventional high-temperature adsorption, during the low-temperature adsorption process, the diffusion rate of low-temperature flue gas is low, the flow of low-temperature flue gas in the adsorption tower is uncontrolled, and the flue gas passes through the adsorption bed. At this time, it is difficult for the flue gas to be evenly distributed across the cross-section of the adsorption bed, resulting in a significantly higher amount of flue gas passing through some areas of the adsorption bed, resulting in inconsistent flue gas purification, affecting the flue gas adsorption effect, and causing adsorbent adsorption The amount of pollutants is different, and the adsorption saturation of the adsorbent is too different, resulting in a large amount of adsorbent, wasting the adsorption capacity of the adsorbent, and increasing the cost. Especially for low-temperature adsorption, the above problems are more obvious.

The present invention aims to solve one of the technical problems in the related art, at least to a certain extent. To this end, the present invention proposes a low-temperature flue gas adsorption tower with a flue gas mixing function. The low-temperature flue gas adsorption tower can mix flue gas in stages to improve the uniformity of flue gas distribution and improve the flue gas adsorption and purification effect. .

The invention also proposes a low-temperature flue gas adsorption system.

The low-temperature flue gas adsorption tower with flue gas mixing function of the present invention includes:

Tower body, the tower body has a flue gas inlet and a flue gas outlet, flue gas below room temperature is input into the tower body through the flue gas inlet, and the clean flue gas purified by adsorption is discharged from the flue gas outlet;

Adsorption layer, the adsorption layer is located in the tower body, the tower body has an adsorbent inlet and an adsorbent outlet, and the adsorption layer is formed by the adsorbent input through the adsorbent inlet. The stacking is formed in the tower body, and the flue gas input into the tower body is adsorbed and purified into clean flue gas by the adsorption layer;

An interlayer component, which is provided in the tower body to form a flue gas mixing space in the adsorption layer. The interlayer component has an adsorbent flow channel and a plurality of flue gas through holes. The adsorbent The flow channel is used for the adsorbent to flow from above the flue gas mixing space through the flue gas mixing space to below the flue gas mixing space, wherein the flue gas enters from below the flue gas mixing space. The flue gas in the gas mixing space flows directly into the adsorption layer above the flue gas mixing space through the flue gas through hole, and/or enters the adsorbent flow channel through the flue gas through hole to pass through the The adsorbent flow channel flows into the adsorption layer above the flue gas mixing space;

A spoiler component, which is communicated with the flue gas mixing space and is used to disturb the flue gas in the flue gas mixing space so that the flue gas in the flue gas mixing space is evenly mixed.

The low-temperature flue gas adsorption tower with flue gas mixing function of the present invention improves the purification effect by performing low-temperature adsorption of flue gas under low-temperature conditions and can achieve near-zero emissions. Moreover, by forming a flue gas mixing space in the adsorption layer, the low-temperature flue gas entering the flue gas mixing space is remixed under the action of the spoiler, which improves the uniformity of low-temperature flue gas distribution in the same horizontal plane and improves Flue gas adsorption and purification effect, the adsorption saturation of the adsorbent is uniform, the adsorption capacity and adsorption capacity utilization of the adsorbent are improved, the adsorbent consumption is reduced, and the cost is reduced. In particular, it is more beneficial for low-temperature adsorption.

Optionally, the pore size of the flue gas through hole is smaller than the particle size of the adsorbent to prevent the adsorbent from entering the flue gas mixing space through the flue gas through hole.

By controlling the pore size of the flue gas through holes, the present invention can prevent the adsorbent from entering the flue gas mixing space from the flue gas through holes, so that the adsorbent can only flow through the adsorbent flow channel, so that the adsorbent layer can be reliably and efficiently The flue gas mixing space is stably formed to achieve phased mixing of the flue gas, which reliably ensures the uniformity of flue gas distribution and adsorption saturation of the adsorbent, and improves the purification effect.

Optionally, the number of the partition components is multiple, and the plurality of partition components are spaced apart in the vertical direction in the tower body.

By arranging multiple interlayer components, the present invention can form multiple flue gas mixing spaces in the adsorption layer. The flue gas can be mixed multiple times during the process of passing through the adsorption layer, further improving the uniformity of the distribution of flue gas in the adsorption layer. , making the adsorption saturation of the adsorbent in different areas more consistent, further improving the adsorption and purification effect of flue gas and the utilization rate of the adsorption capacity of the adsorbent.

Optionally, among the plurality of barrier components, the adsorbent accumulation thickness above the uppermost barrier component is 200mm-400mm, and the adsorbent accumulation thickness below the bottommost barrier component is 50mm. -150mm.

In the present invention, by limiting the positions of the lowermost and lowermost partition components in the adsorption layer (i.e., the corresponding thickness of the adsorbent layer), the air flow disturbance at the flue gas inlet and flue gas outlet has a negative impact on the adsorbent layer. The interference of low-temperature flue gas promotes a more even distribution of low-temperature flue gas, which not only ensures the adsorption effect of the adsorbent, but also avoids interference with low-temperature flue gas.

Optionally, the partition component includes a partition and a plurality of drop tubes, the upper end of the drop tube is connected to the partition, and the inner cavity of the drop tube forms the adsorbent flow channel. The drop tubes are spaced apart from each other to form the flue gas mixing space, and the flue gas through holes are provided on the partition and/or the side walls of the drop tubes to mix the flue gases. The flue gas in the space flows into the adsorption layer above the partition through the flue gas through hole.

The present invention allows the adsorbent to flow downward through the inner cavity of the blanking tube by arranging a blanking tube, and prevents the adsorbent from flowing downward from the outside of the blanking tube by arranging a partition, so that the separation between the partition and the blanking tube can be better achieved. A flue gas mixing space is formed between the adsorbent material layers accumulated under the tube. The flue gas through holes can be provided on the partition and/or on the side wall of the drop tube. The flue gas via holes on the partition can allow the flue gas to be directly After entering the adsorbent material layer above the flue gas mixing space, the flue gas through holes on the side walls of the drop tube can allow the flue gas to enter the drop tube first, and then rise to the adsorbent material layer above the partition.

Optionally, the barrier component includes a plurality of drop tubes, the drop tubes are inverted conical drop hoppers, the inner cavity of the drop tubes forms the adsorbent flow channel, and the drop tubes are The outer peripheral edges of the upper ends are connected to each other to prevent the adsorbent from flowing into the flue gas mixing space through the outer peripheral edges of the upper ends of the drop tubes, and the lower ends of the drop tubes are spaced apart from each other to form the Flue gas mixing space, the flue gas through hole is provided on the side wall of the blanking tube so that the flue gas in the flue gas mixing space flows into the blanking tube through the flue gas via hole and passes through the flue gas mixing space. The inner cavity of the drop tube flows into the adsorption layer above the barrier component.

In the present invention, an inverted conical dropping hopper is provided so that the upper peripheral edges of the dropping tubes are connected to each other to prevent the adsorbent from flowing from the outside of the dropping tube. The lower ends of the dropping tubes are spaced apart from each other to form a flue gas mixing space. The flue gas flows into the drop tube through the hole on the side wall of the drop tube, and then rises to the adsorbent material layer above the partition.

Optionally, the spoiler components include:

An air extraction pipe and an air supply pipe connected with the flue gas mixing space;

A driver is provided between the air extraction pipe and the air supply pipe, and is used to drive the smoke in the smoke mixing space to flow out of the air extraction pipe and flow from the air supply pipe into the smoke mixing space. space to mix the smoke within the smoke mixing space with forced disturbance.

By arranging a driver to forcefully mix the smoke in the smoke mixing space, the present invention further improves the smoke mixing effect in the smoke mixing space, improves the uniformity of the smoke, and further improves the adsorption effect and the adsorption capacity of the adsorbent. utilization and consistency.

Optionally, the number of the air extraction pipes and the air supply pipes is multiple, and at least part of the air extraction pipes and/or at least part of the air supply pipes extend to the center of the flue gas mixing space, and/or

The spoiler component also includes a plurality of baffles, which are spaced apart from each other and arranged in parallel in the flue gas mixing space, and/or

The spoiler component also includes a plurality of baffles, the plurality of baffles are divided into multiple groups, the plurality of baffles in each group of baffles are arranged at intervals from each other, and at least part of the baffle groups are arranged on each of the baffle groups. The air extraction port of the air extraction pipe and/or the air supply port of the air supply pipe are positioned to guide the flow direction of the flue gas corresponding to the corresponding area in the flue gas mixing space.

In the present invention, the number of air extraction pipes and air supply pipes can be multiple. According to the flue gas flow characteristics in the flue gas mixing space, the pumping points of some air extraction pipes and air supply pipes are limited, which can improve the flow rate in the flue gas mixing space. Airflow mixing efficiency. Furthermore, the present invention can guide the flow of smoke by arranging baffles, and can also guide the smoke from the air extraction port and the air supply port to promote the directional flow of smoke in a local area to further improve the airflow mixing. efficiency.

Optionally, a cooling module is provided on the air extraction pipe and/or the air supply pipe, and the cooling module is used to cool the flue gas flowing through the air extraction pipe and/or the air supply pipe.

In the present invention, a cooling module is provided to cool the flue gas in the air extraction pipe and/or the air supply pipe to further reduce the temperature of the flue gas, thereby further improving the purification effect of the adsorbent on the flue gas.

The low-temperature flue gas adsorption system of the present invention includes:

Cooling tower, the cooling tower is used to cool the flue gas into low-temperature flue gas below room temperature;

Adsorption tower, the adsorption tower is a low-temperature flue gas adsorption tower with a flue gas mixing function according to any one of the above, the low-temperature flue gas enters the adsorption tower from the flue gas inlet and mixes with the adsorption tower The adsorbent inside contacts to be adsorbed and purified into clean flue gas and discharged from the flue gas outlet;

A regeneration tower, which is connected to the adsorption tower and is used to regenerate the saturated adsorbent discharged from the adsorption tower and return the regenerated adsorbent to the adsorption tower.

The low-temperature flue gas adsorption system of the present invention cools the flue gas into low-temperature flue gas, so that the flue gas and the adsorbent are contacted in a low-temperature environment for low-temperature adsorption, thereby improving the adsorption effect of the adsorbent on pollutants in the flue gas, and can To achieve near-zero emission of flue gas, the adsorbent is regenerated through the regeneration tower, allowing the adsorbent to be continuously recycled and reducing costs.

Description of the drawings

Figure 1 is a schematic structural diagram of a low-temperature flue gas adsorption tower with a flue gas mixing function according to an embodiment of the present invention.

Figure 2 is a schematic structural diagram of a low-temperature flue gas adsorption tower with flue gas mixing function according to another embodiment of the present invention.

Figure 3 is a schematic structural diagram of a low-temperature flue gas adsorption tower with a flue gas mixing function according to another embodiment of the present invention.

Figure 4 is a schematic structural diagram of a low-temperature flue gas adsorption tower with a flue gas mixing function according to another embodiment of the present invention.

Figure 5 is a schematic structural diagram of the barrier component according to the embodiment of the present invention.

Figure 6 is a schematic structural diagram of a barrier component according to another embodiment of the present invention.

Figure 7 is a schematic structural diagram of a low-temperature flue gas adsorption tower with a flue gas mixing function according to another embodiment of the present invention.

Figure 8 is a schematic structural diagram of the distribution of air extraction pipes and air supply pipes in the embodiment of the present invention.

Figure 9 is a schematic structural diagram of an adsorbent unit in an embodiment of the present invention.

Reference signs:

Tower body 1, flue gas inlet 11, flue gas outlet 12, adsorbent feed port 13, adsorbent discharge port 14;

Flue gas mixing space 21, adsorbent flow channel 22, flue gas through hole 23, drop tube 24, partition 25;

Spoiler component 3, air extraction pipe 31, air supply pipe 32, driver 33, baffle 34;

Adsorption layer 4;

Cooling module 5;

Adsorbent 61, breathable shell 62.

Detailed ways

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present invention and are not to be construed as limiting the present invention.

The following describes a low-temperature flue gas adsorption tower with a flue gas mixing function according to an embodiment of the present invention with reference to Figures 1 to 8. The low-temperature flue gas adsorption tower with a flue gas mixing function includes a tower body 1, and the tower body 1 has a flue gas inlet 11. and flue gas outlet 12. Flue gas below room temperature is input into the tower body 1 from the lower end of the tower body 1 through the flue gas inlet 11. The clean flue gas purified by adsorption is discharged from the upper end of the tower body 1 through the flue gas outlet 12.

There is an adsorption layer 4 in the tower body 1. The tower body 1 has an adsorbent inlet 13 and an adsorbent outlet 14. The adsorbent inlet 13 is located at the top of the tower body 1, and the adsorbent outlet 14 is located at the top of the tower body 1. At the bottom of the tower body 1, the adsorbent input through the adsorbent inlet 13 is accumulated in the tower body 1 to form an adsorption layer 4. The adsorbent saturated with adsorption is discharged through the adsorbent outlet 14, and the adsorbent input into the tower body 1 is The flue gas is purified into clean flue gas through the adsorption layer 4.

In order to make the flue gas entering the adsorption layer 4 evenly distributed on the same horizontal plane, a partition component is provided in the tower body 1. The partition component is placed in the adsorption layer 4, and the partition component forms a mixture of flue gases in the adsorption layer 4. Space 21, the partition component has an adsorbent flow channel 22 and a plurality of flue gas through holes 23. The adsorbent flow channel 22 is used for the adsorbent to flow from above the flue gas mixing space 21 through the flue gas mixing space 21 to the flue gas mixing. Below the space 21, the flue gas entering the flue gas mixing space 21 from below the flue gas mixing space 21 flows directly into the adsorption layer 4 above the flue gas mixing space 21 through the flue gas through hole 23, and/or passes through the flue gas mixing space 21. The gas through hole 23 enters the adsorbent flow channel 22 to flow into the adsorption layer 4 above the flue gas mixing space 21 through the adsorbent flow channel 22 .

In order to improve the mixing adequacy and mixing effect of the flue gas in the flue gas mixing space 21, the embodiment of the present invention is also provided with a spoiler component 3. The spoiler component 3 is connected with the flue gas mixing space 21 and is used to disturb the flue gas mixing space 21. The flue gas in the flue gas mixing space 21 is mixed more evenly. After the flue gas enters the flue gas mixing space 21, it can rely on itself for diffusion and mixing, and at the same time, it can rely on the spoiler 3 for mixing, so that Improved mixing effect.

In the low-temperature flue gas adsorption tower with flue gas mixing function according to the embodiment of the present invention, the adsorbent performs low-temperature adsorption on low-temperature flue gas under low-temperature conditions, thereby improving the purification effect and achieving near-zero emissions. In a low-temperature environment, the nitrogen oxides in the flue gas undergo low-temperature oxidation 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 hundreds of times the adsorption capacity. In addition, the adsorption capacity of components such as sulfur dioxide, carbon dioxide and heavy metals has also increased exponentially in low temperature environments.

Moreover, by forming the smoke mixing space 21 in the adsorption layer 4, the smoke entering the smoke mixing space 21 is mixed under the action of the spoiler 3, thereby improving the uniformity of the smoke distribution on the same horizontal plane, and improving the Flue gas adsorption and purification effect, the adsorption saturation of the adsorbent is uniform, the adsorption capacity and adsorption capacity utilization of the adsorbent are improved, the adsorbent consumption is reduced, and the cost is reduced.

Further, in the embodiment of the present invention, the low temperature is below room temperature. Preferably, the low temperature is below zero degrees Celsius. More preferably, the low temperature is -20°C to -10°C. The inventor found through research that the lower the flue gas temperature, the more beneficial it is for adsorption and purification. However, if the flue gas temperature is too low, the structure of the equipment for cooling the flue gas will be complex and the energy consumption will increase. For example, cooling equipment, adsorption towers and pipelines will be required. Setting up an insulation layer requires high sealing performance, which leads to increased costs. In addition, too low temperature conditions cause condensation water to easily appear in the adsorption tower, causing the adsorbent to stick and block, affecting adsorption. Therefore, it is advantageous to cool the flue gas temperature to -20°C to -10°C.

In some embodiments, the pore size of the flue gas through hole 23 is smaller than the particle size of the adsorbent to prevent the adsorbent from entering the flue gas mixing space 21 through the flue gas through hole 23 .

In other words, by controlling the aperture of the flue gas through hole 23, the embodiment of the present invention can prevent the adsorbent from entering the flue gas mixing space 21 from the flue gas through hole 23, so that the adsorbent can only flow through the adsorbent flow channel 22, thereby This can more reliably and stably form the flue gas mixing space 21 in the adsorption layer 4 to achieve staged mixing of the flue gas, reliably ensure the uniformity of the flue gas distribution and the uniformity of the adsorption saturation of the adsorbent, and improve the Purifying effect.

As shown in Figure 9, optionally, the adsorbent 61 in the embodiment of the present invention can be a granular or powdery adsorbent, or an adsorbent body made of powder or granular adsorbent, such as a powder or granular adsorbent. 61 A spherical body or cylinder formed by a binder. Of course, a protective shell can be further formed outside the adsorbent body, such as a breathable film covering the outside of the adsorbent body to increase the strength of the adsorbent body. The adsorbent 61 can be filled in the breathable shell 62 to form an adsorbent unit, wherein the breathable shell has breathable holes, and the smoke can enter the breathable shell 62 through the breathable holes, and the smoke can pass through the gaps between adjacent adsorbents and / Or the pores of the adsorbent itself can not only reduce direct collision, friction and wear between adsorbents, but also reduce the generation of dust. The breathable shell can be in the shape of a spherical, cylindrical or other rotating body, in which the diameter of the adsorption unit can be 10mm-100mm, and the diameter of the adsorbent can be 1mm-10mm.

When the adsorption layer 4 in the embodiment of the present invention is formed by stacking adsorbent particles or adsorbent bodies, the pore size of the flue gas passage 23 is smaller than the particle size of the adsorbent particles or adsorbent bodies. When the adsorption layer 4 is formed by adsorbent units, When stacked, the pore diameter of the flue gas passage hole 23 is smaller than the particle diameter of the adsorbent unit.

As shown in Figures 3 and 4, in some embodiments, the number of barrier components may be multiple, and the multiple barrier components are spaced apart in the tower body 1 along the vertical direction.

Specifically, the number of barrier components may be two, three or five, and the number of barrier components may be determined according to the thickness of the adsorption layer 4 in the vertical direction and the height of the barrier component in the vertical direction.

In the embodiment of the present invention, by arranging multiple interlayer components, multiple flue gas mixing spaces 21 can be formed in the adsorption layer 4, thereby allowing the flue gas to be remixed multiple times while passing through the adsorption layer 4, further improving the This improves the uniformity of the distribution of flue gas in the adsorption layer 4, makes the adsorption saturation of adsorbents in different areas more consistent, further improves the adsorption and purification effect of flue gas, and makes full use of the adsorption capacity and adsorption capacity of the adsorbent. .

Further, among the plurality of interlayer components, the adsorbent accumulation thickness above the uppermost interlayer component is 200mm-400mm, and the adsorbent accumulation thickness below the lowermost interlayer component is 50mm-150mm.

More specifically, the adsorbent located above the uppermost barrier component can prevent the air flow at the flue gas outlet 12 from interfering with the flue gas flow within the adsorbent layer, and the adsorbent located below the lowermost barrier component can prevent the flue gas inlet. The air flow at point 11 interferes with the flue gas flow in the adsorption layer 4. The thickness of the adsorbent stack above the uppermost compartment component can be 200mm, 240mm, 275mm, 320mm, 387mm or 400mm, and the thickness of the adsorbent stack below the bottommost compartment component can be 50mm, 65mm, 79mm, 111mm, 138mm or 150mm.

By depositing a certain thickness of adsorbent above the uppermost barrier member and below the lowermost barrier member, the smoke in the smoke mixing space 21 formed in the uppermost barrier member and the lowermost barrier member can be reduced. The gas distribution is uniform, thereby ensuring the uniform distribution of the flue gas in the adsorption layer 4 between the uppermost compartment component and the lowermost compartment component on the same horizontal plane and the direction of the air flow in the vertical direction or adjacent to the vertical direction. Steady flow.

The inventor's research found that when the thickness of the adsorbent under the lowest partition component is less than 50 mm, the flue gas flow at the flue gas inlet 11 is easy to disturb the flue gas flow in the flue gas mixing space 21, which is not conducive to the flow of flue gas in the flue gas mixing space 21. The flue gas mixing space 21 is fully mixed.

When the thickness of the adsorbent under the lowest partition is greater than 150mm, it will easily lead to the accumulation of adsorbent under the partition being too thick, resulting in an excessive proportion of adsorbent layers with uneven airflow distribution, which will lead to excessive airflow distribution. On the premise that the flue gas is fully adsorbed and purified, the overall thickness of the adsorption layer 4 will be increased, thereby increasing the size of the adsorption tower.

In the embodiment of the present invention, by limiting the positions of the lowermost and lowermost partition components in the adsorption layer 4 (that is, corresponding to the thickness of the adsorbent layer), the airflow disturbance at the flue gas inlet and flue gas outlet has a reduced impact on the adsorption. The interference of flue gas in the agent layer promotes a more even distribution of low-temperature flue gas, which not only ensures the adsorption effect of the adsorbent, but also avoids interference with low-temperature flue gas.

As shown in FIG. 5 , in some embodiments, the partition component includes a partition plate 25 and a plurality of drop tubes 24 , and the upper ends of the drop tubes 24 are connected to the partition plate 25 .

The inner cavity of the drop tube 24 forms an adsorbent flow channel 22. A plurality of drop tubes 24 are spaced apart from each other to form a flue gas mixing space 21. The flue gas through holes 23 are provided on the partition 25 and/or on the drop tube 24. On the side wall, the flue gas in the flue gas mixing space 21 flows into the adsorption layer 4 above the partition 25 through the flue gas through hole 23 .

In the embodiment of the present invention, the drop tube 24 is provided to allow the adsorbent to flow downward through the inner cavity of the drop tube 24, and the partition 25 is provided to prevent the adsorbent from flowing downward from the outside of the drop tube 24, so that it can be more The flue gas mixing space 21 between the adsorbent material layer above the partition plate and the adsorbent material layer below the drop tubes is reliably formed between the partition plate 25 and the plurality of drop tubes 24, and the flue gas through holes 23 can Located on the partition 25 and/or on the side wall of the blanking tube 24, the flue gas through hole 23 on the partition 25 can allow the flue gas to directly enter the adsorbent material layer above the flue gas mixing space 21, and the blanking tube The flue gas through hole 23 on the side wall of 24 can allow the flue gas to enter the drop tube 24 first, and then rise to the adsorbent material layer above the partition 25.

Optionally, the cross-section of the drop tube 24 is circular, elliptical or diamond-shaped, preferably elliptical or diamond-shaped, so that the flue gas can pass through the flue gas through holes 23 on the side wall of the drop tube 24 and be evenly distributed. In the adsorbent in the inner cavity of the blanking tube 24, the difference between the flue gas concentration in the internal cavity of the blanking tube 24 and the flue gas concentration in the flue gas mixing space 21 can be further improved, thereby further improving the smoke concentration above the flue gas mixing space 21. Uniformity of smoke distribution in adsorption layer 4.

As shown in Figure 6, in some embodiments, the barrier component includes a plurality of drop tubes 24, and the drop tubes 24 are inverted conical drop hoppers.

The inner cavity of the drop tube 24 forms an adsorbent flow channel 22, and the outer peripheral edges of the upper ends of the drop tube 24 are connected to each other to prevent the adsorbent from flowing into the flue gas mixing space 21 through the outer peripheral edges of the upper ends of the drop tube 24. , the lower ends of the blanking tube 24 are spaced apart from each other to form a flue gas mixing space 21, and the flue gas through hole 23 is provided on the side wall of the blanking tube 24 so that the flue gas in the flue gas mixing space 21 passes through the flue gas through hole 23 It flows into the drop tube 24 and flows through the inner cavity of the drop tube 24 into the adsorption layer 4 above the barrier component.

Specifically, in the embodiment of the present invention, an inverted cone-shaped drop hopper is provided so that the upper peripheral edges of the drop tubes 24 are connected to each other to prevent the adsorbent from flowing from the outside of the drop tube 24, and the lower ends of the drop tubes 24 are spaced apart from each other. To form a flue gas mixing space 21, the flue gas flows into the drop tube 24 through the flue gas through hole 23 on the side wall of the drop tube 24, and then rises to the adsorbent material layer above the partition 25.

As shown in FIGS. 1 to 8 , in some embodiments, the spoiler component 3 includes a driver 33 , and an air extraction pipe 31 and an air supply pipe 32 connected with the smoke mixing space 21 . The driver 33 is provided between the air extraction pipe 31 and the air supply pipe 32, and is used to drive the smoke in the smoke gas mixing space 21 to flow out from the air extraction pipe 31 and flow into the smoke mixing space 21 from the air supply pipe 32, thereby forcibly disturbing the mixed smoke mixing. For the smoke in the space 21, the embodiment of the present invention further improves the smoke mixing effect in the smoke mixing space 21 and improves the uniformity of the smoke by setting the driver 33 to forcefully mix the smoke in the smoke mixing space 21. , further improving the adsorption effect and the utilization rate and consistency of the adsorption capacity of the adsorbent.

Optionally, the driver 33 is a fan, and the fan can be arranged on the side wall outside the adsorption tower. The air extraction pipe 31 and the air supply pipe 32 are set at different positions of the flue gas mixing space 21. For example, the air extraction pipe 31 is set at the flue gas concentration. In a relatively high area, the air supply pipe 32 is provided in an area with a relatively low smoke concentration to adjust and balance the smoke concentration in different areas in the smoke mixing space 21, or by arranging multiple air supply pipes 32, multiple The air flow of the air supply pipe 32 can drive the flue gas in the flue gas mixing space 21 to flow in a spiral to speed up the flue gas mixing speed in the flue gas mixing space 21. The air extraction pipe 31 can be located at the center of the spiral or at a dead end of the air flow. Area.

As shown in FIGS. 1 to 8 , in some embodiments, the number of air extraction pipes 31 and air supply pipes 32 may be multiple, and at least part of the air extraction pipe 31 and/or at least part of the air supply pipe 32 extends to the flue gas mixing space 21 In the center of the air exhaust pipe 31 and the air supply pipe 32, the positions of the air extraction ports and the air supply ports are arranged to ensure that the smoke in the smoke mixing space 21 can be fully mixed, and to enhance the mixing of the smoke in the smoke mixing space 21. flow.

Optionally, if the cross-section of the adsorption tower is rectangular, the cross-section of the flue gas mixing space 21 formed is also rectangular. Air flow dead corners are easily formed at each end corner of the flue gas mixing space 21, which will lead to a low flue gas flow rate. Therefore, the suction ports of the four air extraction pipes 31 are respectively located at the four end corners of the smoke mixing space 21, and the air supply ports of the multiple air supply pipes 32 are located in the middle of the smoke mixing space 21, and the multiple air supply ports are The air supply port of the air pipe 32 can drive the air flow in the flue gas mixing space 21 to spiral, thereby improving the flue gas mixing effect in the rectangular flue gas mixing space 21 and making it more uniform.

The number of air extraction pipes 31 and air supply pipes 32 in the embodiment of the present invention may be multiple, and the pumping points of some of the air extraction pipes 31 and air supply pipes 32 are specifically set according to the flue gas flow characteristics in the flue gas mixing space 21 , the airflow mixing effect in the flue gas mixing space 21 can be further improved.

In some embodiments, the spoiler component 3 further includes a plurality of baffles 34 , and the baffles 34 are spaced apart from each other and arranged in parallel in the flue gas mixing space 21 .

As shown in Figure 7, the baffles 34 can guide the air flow, so that the smoke flows along the gap between two adjacent baffles 34, and cooperate with the forced disturbance of the driver 33 to improve the smoke in the smoke mixing space 21. Blend effect.

In some embodiments, the spoiler component 3 further includes multiple baffles 34 divided into multiple groups, and the multiple baffles 34 in each group of baffles 34 are spaced apart from each other.

As shown in FIG. 8 , at least part of the baffle group is arranged at the air extraction port of the air extraction pipe 31 and/or the air supply port of the air supply pipe 32 to guide the flow direction of the flue gas in the corresponding area in the corresponding flue gas mixing space 21 . In the embodiment of the present invention, by providing baffles 34, the smoke at the air extraction port and the air supply port can be guided, promoting the directional flow of smoke in a local area, and further improving the air flow mixing effect.

Figure 8 shows that four sets of baffles 34 are respectively arranged at the air extraction ports of the air extraction pipes of the four spoiler components to avoid large disturbances in local areas during air extraction, while the air flow efficiency in other areas is low. At the same time, four sets of baffles 34 are located at the end corners of the tower body, which can avoid the formation of air flow dead corners at the end corners and improve the flue gas flow effect in the flue gas mixing space.

Further, multiple baffles 34 in each group of baffles 34 may be spaced apart from each other and arranged in parallel.

Optionally, the multiple baffles 34 in each group of baffles 34 are distributed in a fan shape, that is to say, the multiple baffles 34 are spaced apart from each other, but two adjacent baffles 34 are close to one end of the air extraction port or the air supply port. The spacing distance is smaller than the spacing distance at the end far away from the air extraction port or the air supply port to form a fan shape.

Optionally, the lengths of the multiple baffles 34 in each group of baffles 34 can be different, so as to better and targeted guide the airflow in the local area and improve the air flow in the entire flue gas mixing space 21 Airflow mixing effect. For example, in a set of baffles 34, the length of the baffles located at the edges is relatively short, and the length of the baffles located in the middle is relatively long. The longer baffles can be used to extract or supply air. The airflow extends further away from the corresponding air extraction port or air supply port.

As shown in Figures 1 to 8, in some embodiments, a cooling module 5 is provided on the air extraction pipe 31 and/or the air supply pipe 32. The cooling module 5 is used to cool down the flue gas flowing through the air extraction pipe 31 and/or the air supply pipe 32. Allow to cool.

In the embodiment of the present invention, by setting the cooling module 5 to cool the flue gas in the air extraction pipe 31 and/or the air supply pipe 32, the low-temperature adsorption and purification effect of the adsorbent on the flue gas can be further improved, because the adsorbent can be used in low-temperature environments. The adsorption performance will be doubled. Therefore, when multiple interlayer components are provided, the purification and adsorption effect of the flue gas will be greatly improved by cooling the flue gas multiple times.

Further, the cooling module 5 can cool the flue gas passing through the air extraction pipe 31 and/or the air supply pipe 32 to below room temperature. Preferably, the flue gas passing through the air extraction pipe 31 and/or the air supply pipe 32 can be cooled to below zero. Preferably, the flue gas passing through the air extraction pipe 31 and/or the air supply pipe 32 is cooled to -20°C to -10°C.

Optionally, when multiple interlayer components are arranged, the flue gas in the flue gas mixing space 21 corresponding to different interlayer components can be cooled to different temperatures. Along the flow direction of the flue gas, the flue gas in the multiple interlayer components can be cooled to different temperatures. The flue gas temperature in the mixing space 21 can be gradually reduced. For example, three partition components are arranged in the adsorption tower. Along the direction of flue gas flow, the flue gas temperatures in the three flue gas mixing spaces 21 formed are 0 to 10°C, respectively. -10℃～-5℃, -20℃～-10℃.

The inventor found through research that the lower the flue gas temperature, the more beneficial it is for adsorption and purification. However, if the flue gas temperature is too low, the structure of the equipment for cooling the flue gas will be complex and the energy consumption will increase. For example, cooling equipment, adsorption towers and pipelines will be required. Setting up an insulation layer requires high sealing performance, which leads to increased costs. In addition, too low temperature conditions cause condensation water to easily appear in the adsorption tower, causing the adsorbent to stick and block, affecting adsorption. Therefore, it is advantageous to cool the flue gas temperature to -20°C to -10°C.

Optionally, the cooling module 5 is a heat exchanger. For example, the cooling module 5 adopts a fin tube heat exchanger or a plate heat exchanger.

The low-temperature flue gas adsorption system of the embodiment of the present invention is described below. The low-temperature flue gas adsorption system in the embodiment of the present invention includes a cooling tower, an adsorption tower and a regeneration tower. The cooling tower is used to cool the flue gas into low-temperature flue gas below room temperature. The adsorption tower is a flue gas mixing function according to the above embodiment. Low-temperature flue gas adsorption tower. The low-temperature flue gas enters the adsorption tower from the flue gas inlet 11 and contacts the adsorbent in the adsorption tower to be adsorbed and purified into clean flue gas and is discharged from the flue gas outlet 12. The regeneration tower is connected to the adsorption tower for The saturated adsorbent discharged from the adsorption tower is regenerated and the regenerated adsorbent is returned to the adsorption tower.

In the low-temperature flue gas adsorption system of the embodiment of the present invention, the flue gas and the adsorbent are contacted in a low-temperature environment, thereby improving the adsorption effect of the adsorbent on pollutants in the flue gas, and the adsorbent is regenerated through the regeneration tower, so that the adsorbent can Continuous recycling reduces costs and improves efficiency.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axis", The orientations or positional relationships indicated by "radial direction", "circumferential direction", etc. are based on the orientations or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply the referred devices or components. Must have a specific orientation, be constructed and operate in a specific orientation and are therefore not to be construed as limitations of the invention.

In addition, the terms “first” and “second” are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of indicated technical features. Therefore, features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise expressly and specifically limited.

In the present invention, unless otherwise clearly stated and limited, the terms "installation", "connection", "connection", "fixing" and other terms should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection. , or integrated; it can be mechanically connected, electrically connected or communicable with each other; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction between two elements, Unless otherwise expressly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

In the present invention, unless otherwise expressly stated and limited, a first feature being "on" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. touch. Furthermore, the terms "above", "above" and "above" the first feature is above the second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "below" and "beneath" the first feature to the second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature has a smaller horizontal height than the second feature.

In the present disclosure, the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" etc. mean the specific features, structures, materials or materials described in connection with the embodiment or example. Features are included in at least one embodiment or example of the invention. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification unless they are inconsistent with each other.

Although the above embodiments have been shown and described, it can be understood that the above embodiments are illustrative and should not be construed as limitations of the present invention. Changes, modifications, substitutions and modifications of the above embodiments may be made by those of ordinary skill in the art. All are within the protection scope of the present invention.

Claims (9)

1. A low temperature flue gas adsorption tower with flue gas mixing function, which is characterized by comprising:

the tower body is provided with a flue gas inlet and a flue gas outlet, flue gas below room temperature is input into the tower body through the flue gas inlet, and purified flue gas after adsorption is discharged from the flue gas outlet;

the adsorption layer is arranged in the tower body, the tower body is provided with an adsorbent feeding hole and an adsorbent discharging hole, the adsorption layer is formed by stacking adsorbents input through the adsorbent feeding hole in the tower body, and flue gas input into the tower body is adsorbed and purified into clean flue gas by the adsorption layer;

a barrier member disposed within the tower body to form a flue gas mixing space within the adsorbent layer, the barrier member having an adsorbent flow passage for the adsorbent to flow from above the flue gas mixing space through the flue gas mixing space to below the flue gas mixing space, and a plurality of flue gas vias, wherein flue gas entering the flue gas mixing space from below the flue gas mixing space flows directly into the adsorbent layer above the flue gas mixing space through the flue gas vias and/or into the adsorbent flow passage through the flue gas vias to flow through the adsorbent flow passage into the adsorbent layer above the flue gas mixing space;

the turbulence component is communicated with the flue gas mixing space and is used for agitating flue gas in the flue gas mixing space so as to uniformly mix the flue gas in the flue gas mixing space;

the spoiler comprises:

an exhaust pipe and an air supply pipe communicated with the flue gas mixing space;

the driver is arranged between the exhaust pipe and the air supply pipe and is used for driving the smoke in the smoke mixing space to flow out of the exhaust pipe and flow into the smoke mixing space from the air supply pipe so as to forcedly mix the smoke in the smoke mixing space.

2. The low temperature flue gas adsorption tower with flue gas mixing function according to claim 1, wherein the pore size of the flue gas via is smaller than the particle size of the adsorbent to prevent the adsorbent from entering the flue gas mixing space through the flue gas via.

3. The low-temperature flue gas adsorption tower with a flue gas mixing function according to claim 1, wherein the number of the partition members is plural, and the plural partition members are arranged in the tower body at intervals in the vertical direction.

4. A low temperature flue gas adsorption tower having a flue gas mixing function according to claim 3, wherein among the plurality of barrier members, the adsorbent stacking thickness above the uppermost barrier member is 200mm to 400mm, and the adsorbent stacking thickness below the lowermost barrier member is 50mm to 150mm.

5. The low temperature flue gas adsorption tower with flue gas mixing function according to any one of claims 1 to 4, wherein the partition member includes a partition plate and a plurality of blanking pipes, the upper ends of the blanking pipes are connected to the partition plate, the inner cavities of the blanking pipes form the adsorbent flow passages, the plurality of blanking pipes are arranged at intervals to form the flue gas mixing space, and the flue gas through holes are formed on the partition plate and/or on the side walls of the blanking pipes so that flue gas in the flue gas mixing space flows into the adsorption layer above the partition plate through the flue gas through holes.

6. The low temperature flue gas adsorption tower with flue gas mixing function according to any one of claims 1 to 4, wherein the barrier member includes a plurality of down pipes, the down pipes are inverted cone-shaped down hoppers, the inner cavities of the down pipes form the adsorbent flow passages, the peripheral edges of the upper ends of the down pipes meet each other to prevent the adsorbent from flowing into the flue gas mixing space between the peripheral edges of the upper ends of the down pipes, the lower ends of the down pipes are spaced apart from each other to form the flue gas mixing space, and the flue gas through holes are provided on the side walls of the down pipes to allow flue gas in the flue gas mixing space to flow into the down pipes through the flue gas through holes and into the adsorption layer above the barrier member through the inner cavities of the down pipes.

7. The flue gas adsorption tower with flue gas mixing function according to claim 1, wherein the number of the exhaust pipes and the air supply pipes is plural, at least part of the exhaust pipes and/or at least part of the air supply pipes extend to the central part of the flue gas mixing space, and/or

The turbulence member also comprises a plurality of baffles which are arranged in the flue gas mixing space at intervals and in parallel, and/or

The turbulence component further comprises a plurality of baffle plates, the baffle plates are divided into a plurality of groups, the baffle plates in each group of baffle plates are arranged at intervals, and at least part of baffle plate groups are arranged at the air extraction opening of the air extraction pipe and/or the air supply opening of the air supply pipe to guide the flow direction of the flue gas in the corresponding region in the flue gas mixing space.

8. The low-temperature flue gas adsorption tower with a flue gas mixing function according to claim 1, wherein a cooling module is arranged on the exhaust pipe and/or the air supply pipe and is used for cooling the flue gas flowing through the exhaust pipe and/or the air supply pipe.

9. A low temperature flue gas adsorption system, comprising:

the cooling tower is used for cooling the flue gas into low-temperature flue gas below room temperature;

an adsorption tower, which is a low-temperature flue gas adsorption tower with a flue gas mixing function according to any one of claims 1-8, wherein the low-temperature flue gas enters the adsorption tower from the flue gas inlet and contacts with an adsorbent in the adsorption tower to be adsorbed and purified to be purified flue gas and is discharged from the flue gas outlet;

and the regeneration tower is connected with the adsorption tower and is used for regenerating the adsorption saturated adsorbent discharged from the adsorption tower and sending the regenerated adsorbent back into the adsorption tower.