WO2023029411A1

WO2023029411A1 - Moving bed adsorption tower and flue gas purification system having same

Info

Publication number: WO2023029411A1
Application number: PCT/CN2022/078430
Authority: WO
Inventors: 许世森; 汪世清; 梁鹤涛; 郜时旺; 肖平; 刘练波; 牛红伟; 黄斌; 雷中辉
Original assignee: 中国华能集团有限公司; 中国华能集团清洁能源技术研究院有限公司
Priority date: 2021-09-02
Filing date: 2022-02-28
Publication date: 2023-03-09

Abstract

A moving bed adsorption tower. The moving bed adsorption tower comprises a tower body (1) and a distributor (2). A cavity is formed in the tower body (1). The tower body (1) is provided with a feed port (111), a discharge port (141), a flue gas inlet (131) and a flue gas outlet (121) which are in communication with the cavity. The cavity has an air inlet section (13), a material filling section (12) and a material adding section (11) in a flue gas flow direction. The material filling section (12) is used for filling an adsorbent. The distributor (2) is disposed in the tower body (1). The distributor (2) is provided with multiple blanking ports (22) arranged at intervals. The distributor (2) is located below the material packing section (12), such that the adsorbent in the material packing section (12) flows out through the blanking ports (22). The blanking ports (22) comprise a first portion and a second portion. The blanking ports (22) in the first portion are arranged surrounding the blanking ports (22) in the second portion. The average cross-sectional area of the blanking ports (22) in the first portion is greater than the average cross-sectional area of the blanking ports (22) in the second portion. The moving bed adsorption tower has the advantages of uniform blanking speed and uniform adsorption effects.

Description

Moving bed adsorption tower and its flue gas purification system

Cross References to Related Applications

This application is based on the application number 202122114270.3, the application date is September 2, 2021, the application number is 202122240687.4, the application date is September 15, 2021, the application number is 202111028514.4, the application date is September 2, 2021 and the application number A Chinese patent application 202111082803.2 with a filing date of September 15, 2021 was filed, and the priority of this Chinese application is claimed. The entire content of this Chinese patent application is hereby incorporated by reference into this application.

technical field

The present disclosure relates to the technical field of flue gas treatment, in particular to a moving bed adsorption tower and a flue gas purification system having the same.

Background technique

The large amount of pollutants produced by coal combustion flue gas is one of the important factors that endanger the atmospheric environment and human health. In the field of flue gas purification, fixed bed adsorption towers are usually used to adsorb pollutants in flue gas to achieve the purpose of purifying flue gas. The problem of unevenness, poor adsorption effect, and the decrease of adsorption capacity with the extension of use time, and the need to stop working when the adsorbent needs to be replaced, seriously affects the adsorption efficiency and increases the difficulty of operation.

Contents of the invention

The present disclosure aims to solve one of the technical problems in the related art at least to a certain extent. For this reason, the embodiment of the present disclosure proposes a moving bed adsorption tower with uniform blanking.

Embodiments of the present disclosure also propose a flue gas purification system comprising the above-mentioned moving bed adsorption tower.

The moving bed adsorption tower according to an embodiment of the present disclosure includes a tower body, the tower body has a cavity, and the tower body is provided with a feeding port, a material outlet, a flue gas inlet and a flue gas outlet communicating with the cavity , the cavity has an inlet section, a packing section and a cloth section in the flow direction of the flue gas, and the packing section is used to fill the adsorbent; the distributor, the distributor is arranged in the tower body, the distribution The distributor is provided with several feeding openings arranged at intervals, the distributor is located below the packing section so that the adsorbent in the packing section flows out through the feeding openings, and the several feeding openings include the first part and The second part, the discharge openings in the first part are arranged around the discharge openings in the second part, and the average cross-sectional area of the discharge openings in the first part is larger than the discharge openings in the second part The average cross-sectional area of the mouth.

The moving bed adsorption tower according to the embodiment of the present disclosure has the advantages of uniform material dropping speed and uniform adsorption effect.

In some embodiments, the cross-sectional areas of the several discharge openings increase sequentially from the inside to the outside.

In some embodiments, the distributor includes a distribution plate, the discharge opening is arranged on the distribution plate, the distribution plate is connected with the peripheral wall of the cavity, and the smoke inlet is located on the distribution plate Below, the distribution plate has a centerline extending in the vertical direction, the farther away from the centerline, the larger the cross-sectional area of the discharge opening.

In some embodiments, several of the discharge openings are arranged in multiple rows, each row of discharge openings includes several of the discharge openings, and the plurality of discharge openings in each row of discharge openings are arranged at intervals along the first direction. The discharge openings are arranged at intervals in the second direction, the first direction and the second direction are perpendicular to each other, and two adjacent rows of discharge openings are aligned in the second direction.

In some embodiments, the cross-section of the discharge opening is circular or square.

In some embodiments, the interval between two adjacent blanking ports in the first direction is 20mm-100mm, and the interval between two adjacent blanking ports in the second direction is 20mm-100mm.

In some embodiments, the moving bed adsorption tower further includes a plurality of downpipes, the plurality of downpipes correspond to the plurality of downholes one by one, the downpipes are located below the distribution plate and There is a space between the distribution plate and the flue gas flow, and the discharge pipe is located above the discharge port.

In some embodiments, the vertical dimension of the gap between the top end of the drop tube and the lower end surface of the distribution plate is 20mm-100mm.

In some embodiments, the moving bed adsorption tower also includes a distributor, the distributor is arranged in the tower body, the distributor includes several distribution inlets and several distribution outlets corresponding to the distribution inlets, the distributor Located below the feeding port and above the packing section, so as to distribute the adsorbent entering from the feeding port to the packing section, the flue gas outlet is located below the cloth inlet and the cloth above the exit.

The flue gas purification system according to an embodiment of the present disclosure includes a flue gas cooling device, the flue gas cooling device has a smoke inlet and a smoke outlet, and the flue gas cooling device is used to convert the smoke entering from the smoke inlet into The gas is cooled to room temperature and below; the moving bed adsorption tower, the moving bed adsorption tower is the moving bed adsorption tower according to any one of the above-mentioned embodiments, the smoke outlet of the flue gas cooling device is connected with the moving bed adsorption tower The outlet of the flue gas is connected, and the moving bed adsorption tower is used to adsorb the flue gas.

Description of drawings

FIG. 1 is a front view of a moving bed adsorption column according to an embodiment of the present disclosure.

2 is a top view of a moving bed adsorption column according to an embodiment of the disclosure.

Fig. 3 is a cross-sectional view at A-A in Fig. 2 .

Fig. 4 is a cross-sectional view at B-B in Fig. 3 .

FIG. 5 is a cross-sectional view at B-B in FIG. 3 of another embodiment of the present disclosure.

FIG. 6 is a front view of the distributor of FIG. 3 .

7 is a front view of the distributor of FIG. 3 according to another embodiment of the present disclosure.

FIG. 8 is a cross-sectional view at A-A in FIG. 2 of another embodiment of the present disclosure.

Reference signs:

Tower body 1; material distribution section 11; feeding port 111; packing section 12; flue gas outlet 121; air intake section 13; flue gas inlet 131; discharge section 14; discharge port 141;

Distributor 2; distribution plate 21; discharge port 22; distribution pipe 23;

Blanking pipe 3;

Distributor 4; cloth inlet 41; cloth outlet 42.

Detailed ways

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present disclosure and should not be construed as limiting the present disclosure.

As shown in FIGS. 1 to 3 , a moving bed adsorption tower according to an embodiment of the present disclosure includes a tower body 1 and a distributor 2 .

There is a cavity in the tower body 1, and the tower body 1 is provided with a feed port 111, a discharge port 141, a flue gas inlet 131 and a flue gas outlet 121 communicating with the cavity, and the cavity has an inlet section in the flow direction of the flue gas 13. The packing section 12 and the cloth section 11, the packing section 12 is used for filling the adsorbent.

Specifically, the flue gas inlet 131 communicates with the air inlet section 13, the flue gas outlet 121 communicates with the material distribution section 11, the feeding port 111 communicates with the material distributing section 11, the feeding port 111 and the flue gas outlet 121 are located above the packing section 12, and the discharge The port 141 and the flue gas inlet 131 are located below the packing section 12 . It should be noted that the flue gas flow direction is from the flue gas inlet 131 to the flue gas outlet 121 , and the fabric section 11 , filler section 12 and air intake section 13 are arranged sequentially from top to bottom. Thus, the flue gas enters the interior of the tower body 1 from the lower half of the tower body 1 and flows out from the upper side of the tower body 1, and the adsorbent enters the tower body 1 from the upper side of the tower body 1 and flows out from the lower end of the tower body 1 , the flow direction of the flue gas is opposite to that of the adsorbent, the concentration of nitrogen and sulfur in the flue gas gradually decreases as the flue gas rises, the adsorption effect of the adsorbent gradually decreases with the contact time with the flue gas, and the lower nitrogen and sulfur concentrations The flue gas is contacted with an adsorbent with good adsorption effect, which can effectively reduce the concentration of nitrogen and sulfur in the gas discharged from the flue gas outlet 121, and improve the adsorption efficiency.

The distributor 2 is arranged in the tower body 1, and the distributor 2 is provided with a plurality of blanking openings 22 arranged at intervals. The distributor 2 is located below the packing section 12 so that the adsorbent in the packing section 12 flows out through the feeding openings 22. The discharge port 22 includes a first part and a second part, the discharge port 22 in the first part is arranged around the discharge port 22 in the second part, and the average cross-sectional area of the discharge port 22 in the first part is larger than that in the second part The average cross-sectional area of the blanking opening 22.

Specifically, as shown in FIG. 4 , the blanking opening 22 is square, which improves the space utilization rate of the blanking opening 22 in the horizontal direction, thereby improving the efficiency of blanking. The discharge opening 22 is a through hole on the distributor 2. The first part is close to the horizontal center of the distributor 2, and the second part is arranged around the first part. This setting can improve the efficiency of the discharge at the edge of the distributor 2, so that the adsorbent particles can be distributed from the distributor 2. It falls evenly in the device 2, avoiding the situation that the center flow is large and the edge flow is small. The distances between the geometric centers of adjacent blanking openings 22 are equal. The moving bed adsorption tower according to the embodiment of the present disclosure has the advantage of uniform material discharge speed, and uniform material discharge speed means that the flow rate of the adsorbent in the adsorption tower is uniform, and the uniform flow rate of the adsorbent is beneficial to the uniform adsorption effect of the flue gas. Therefore, the moving bed adsorption tower according to the embodiment of the present disclosure also has the advantage of uniform adsorption effect.

In some other embodiments, the feeding opening 22 may also be circular.

In some embodiments, the cross-sectional areas of the several feeding openings 22 increase sequentially from the inside to the outside.

Specifically, the blanking openings 22 are evenly arranged on the distributor 2, the cross-sectional area of the blanking openings 22 near the center of the distributor 2 is relatively small, and the cross-sectional area of the blanking openings 22 near the edge of the distributor 2 is relatively large, so that the arrangement can improve The efficiency of material dropping at the edge of the distributor 2 reduces the efficiency of material dropping at the center of the distributor 2, so that the adsorbent particles fall evenly from the distributor 2, avoiding the situation where the flow rate at the center is large and the flow rate at the edge is small.

In some embodiments, as shown in FIG. 6 , the distributor 2 includes a distribution plate 21, the discharge opening 22 is arranged on the distribution plate 21, the distribution plate 21 is connected to the peripheral wall of the cavity, and the smoke inlet 131 is located on the side of the distribution plate 21. Below, the distribution plate 21 has a centerline extending in the vertical direction, and the farther it is from the centerline, the larger the cross-sectional area of the discharge opening 22 is.

Specifically, the lower end of the distribution plate 21 is higher than the upper end of the flue gas inlet 131, and the flue gas inlet 131 is completely below the distribution plate 21, so that all the flue gas can pass through the blanking opening 22, which improves the adsorption capacity of the flue gas. The contact time of the agent particles is improved, thereby improving the efficiency of adsorption.

In some embodiments, several blanking openings 22 are arranged in multiple rows, each row of blanking openings 22 includes several blanking openings 22, and several blanking openings 22 in each row of blanking openings 22 are arranged at intervals along the first direction, Multiple rows of blanking openings 22 are arranged at intervals in the second direction, the first direction and the second direction are perpendicular to each other, and two adjacent rows of blanking openings 22 are aligned in the second direction.

Specifically, the distribution plate 21 is a perforated flat plate, and the discharge opening 22 is the through hole on the distribution plate 21. The distribution plate 21 is arranged horizontally, and the geometric centers of the adjacent two rows of discharge openings 22 are the same. Each row of discharge openings 22 The distance between the geometric centers of two adjacent blanking openings 22 is the same. Thus, the horizontal arrangement of the distribution plate 21 can ensure that the adsorbent is evenly piled up on the top of the distribution plate 21, and the evenly arranged blanking opening 22 ensures that the material is evenly blanked so as to improve the efficiency of the material blanking. The distribution plate 21 is rectangular, and the distribution plate 21 The length is 1000mm-3000mm, the width of the distribution plate 21 is 500mm-1500mm, the first direction is the length direction of the distribution plate 21, and the second direction is the width direction of the distribution plate 21. It should be noted that, as shown in FIG. 4 , the first direction is the left-right direction, and the second direction is the front-rear direction.

In some embodiments, the cross-section of the discharge port 22 is circular or square.

Specifically, as shown in FIG. 5 , the section of the blanking opening 22 is circular, and the diameter of the blanking opening 22 is 100mm-300mm. Therefore, on the one hand, enough discharge openings 22 are provided on the distribution plate 21 to make the discharge more uniform; on the other hand, the diameter of the discharge openings 22 within the above range can make the adsorbent particles fall smoothly.

In some other embodiments, as shown in FIG. 4 , the cross section of the discharge opening 22 is square, and the side length of the discharge opening 22 is 150mm-300mm. Thus, on the one hand, enough blanking openings 22 are provided on the distribution plate 21 to make the blanking more uniform; Mouth 22.

In some embodiments, the interval between two adjacent blanking ports 22 in the first direction is 20mm-100mm, and the interval between two adjacent blanking ports 22 in the second direction is 20mm-100mm. 100mm.

Specifically, the distance between two adjacent blanking openings 22 is the distance between two nearest points of two adjacent blanking openings 22 . The interval between two adjacent blanking ports 22 can be any value between 20mm and 100mm, for example, the interval between two adjacent blanking ports 22 can be 25mm, 30.7mm, 70mm, 86.85m wait. It should be noted that the interval between two adjacent discharge openings 22 in the first direction and the interval between two adjacent discharge openings 22 in the second direction may be the same or different.

In some embodiments, the moving bed adsorption tower also includes a plurality of downpipes 3 corresponding to a plurality of downholes 22 one by one, and the downpipes 3 are located below the distribution plate 21 and connected to the distribution plate There is an interval between 21 to facilitate the flow of flue gas, and the discharge pipe 3 is located above the discharge port 141 .

Specifically, the geometric center of the blanking opening 22 in the horizontal direction is the same as the geometric center of the blanking tube 3 in the horizontal direction, the upper end of the blanking tube 3 is spaced from the lower end of the distributor 2, and the smoke inlet 131 The upper edge is located below the blanking opening 22 to ensure that the flue gas inlet 131 is completely below the blanking opening 22 . Thus, after the flue gas enters the tower body 1 from the flue gas inlet 131, it enters the packing section 12 through the space between the blanking pipe 3 and the blanking port 22. The path of the flue gas entering the seasoning section is shorter and smoother, and the smoke The pressure drop caused by energy loss when the gas flows improves the fluency of the flue gas flowing in the packing section 12, thereby improving the adsorption effect.

In some other embodiments, as shown in FIG. 7 , the distributor 2 includes a distribution plate 21 and a plurality of distribution pipes 23, the distribution pipes 23 are connected to the lower end surface of the distribution plate 21 and extend downward from the distribution plate 21, and the distribution pipes 23 It is a square tube, and a plurality of distribution pipes 23 corresponds to a plurality of discharge openings 22 one by one, and a plurality of discharge pipes 3 corresponds to a plurality of distribution pipes 23 one to one.

Specifically, as shown in FIG. 8 , the lower end of the distribution pipe 23 protrudes into the upper end of the corresponding drop pipe 3 , and there is an interval between the distribution pipe 23 and the corresponding drop pipe 3 . Thus, when the adsorbent passes through the distribution pipe 23 and falls into the discharge pipe 3, it can completely fall into the discharge pipe 3, preventing the adsorbent from splashing out from the gap between the discharge outlet 24 and the discharge pipe 3, thereby Prevent the adsorbent from flowing out of the tower body 1 from the flue gas inlet 131 .

In some embodiments, the vertical dimension of the gap between the top end of the drop tube 3 and the lower end surface of the distribution plate 21 is 20mm-100m. Specifically, the vertical dimension of the gap between the drop tube 3 and the distribution plate 21 may be any value between 20 mm and 100 mm. In some embodiments, the vertical dimension of the gap between the drop tube 3 and the distribution plate 21 is 75mm, which is conducive to improving the flue gas passing through the gap between the drop tube 3 and the distribution plate 21. traffic.

In some embodiments, the moving bed adsorption tower also includes a distributor 4, the distributor 4 is arranged in the tower body 1, the distributor 4 includes several distribution inlets and several distribution outlets corresponding to the distribution inlets, and the distributor 4 is located at the feeding port 111 Below and above the packing section 12, in order to distribute the adsorbent entering from the feeding port 111 to the packing section 12, the flue gas outlet 121 is located below the cloth inlet and above the cloth outlet.

Specifically, the cloth inlet 41 corresponds to the cloth outlet 42 one by one, the cloth inlet 41 is above the cloth outlet 42, the cloth inlet 41 is arranged horizontally at equal intervals, the cross section of the cloth inlet 41 and the cloth outlet 42 is circular, and the cloth inlet 41 and Channels are formed between the distribution outlets 42 for the adsorbent particles to pass through the distributor 4 . Thus, the distributor 4 makes the adsorbent particles accumulate on the upper side of the distributor 4, and falls into the filler section 12 through the cloth inlet 41 and the cloth outlet 42, and when the adsorbent passes through the uniformly arranged cloth inlet 41 and the cloth outlet The outlet 42 will evenly fall into the packing section 12, and the adsorbent particles are evenly distributed in the packing section 12, so that the moving bed adsorption tower can absorb evenly and improve the adsorption effect. In addition, the height of the upper edge of the smoke outlet 121 is lower than the height of the cloth inlet, and the height of the lower edge of the smoke outlet 121 is higher than the height of the cloth outlet, so that the smoke outlet 121 is completely located between the cloth inlet and the cloth outlet in the vertical direction. Between the outlets, on the one hand, the adsorbent particles are prevented from splashing out from the flue gas outlet 121, and on the other hand, the flue gas adsorption is more uniform.

In some embodiments, the cavity further includes a discharge section 14 located below the cloth section 11 , the discharge section 14 is in an inverted cone shape, and the discharge port 141 communicates with the bottom of the discharge section 14 .

Specifically, the cavity refers to the space inside the tower body 1, the discharge section 14 is an inverted quadrangular pyramid, the top of the discharge section 14 is connected with the inlet section 13, the discharge section 14 is a hollow structure, and the inside of the discharge section 14 The space is connected with the cavity, the cross-sectional area of the discharge section 14 gradually decreases along the direction from top to bottom, and the discharge port 141 is arranged at the lower end of the discharge section 14 . Thus, after the adsorbent completes the adsorption of harmful components in the flue gas, it falls into the discharge section 14 through the discharge pipe 3 and is collected in the discharge section 14. After a certain amount of adsorbent is collected, it is discharged from the discharge section 14 The material port 141 is discharged, and the recovered adsorbent is processed in the next step. When the material outlet 141 is closed, the harmful components escaping from the adsorbent flow upward together with the flue gas entering the flue gas inlet 131, and will not be volatilized. to the atmosphere.

The flue gas purification system according to an embodiment of the present disclosure includes a flue gas cooling device, the flue gas cooling device has a smoke inlet and a smoke outlet, and the flue gas cooling device is used to cool the flue gas entering from the smoke inlet to room temperature or below Moving bed adsorption tower, the moving bed adsorption tower is the moving bed adsorption tower according to any one of the above-mentioned embodiments, the smoke outlet of the flue gas cooling device is communicated with the flue gas outlet 121 of the moving bed adsorption tower, and the moving bed adsorption tower is used for Smoke is adsorbed.

In some embodiments, the temperature of the flue gas entering the flue gas inlet 131 is -100° C. to room temperature (for example, the room temperature is 25° C.). In some embodiments, the sorbent is activated coke (carbon).

The flue gas purification system provided in this example adopts the low-temperature adsorption method when adsorbing the flue gas, and utilizes the dissolution characteristics and adsorption characteristics of the pollutant components in the flue gas at low temperatures to remove pollutants, and can simultaneously realize desulfurization and denitrification . Among them, the sulfur dioxide in the flue gas is mainly physically adsorbed, the desorption temperature is low, the loss of the adsorbent is low, and the replenishment of the adsorbent is low, which reduces the operating cost. Moreover, the flue gas purification system that adsorbs at low temperature has a large adsorption capacity for pollutants, a small amount of adsorbent loading, and a small footprint for equipment such as moving bed adsorption towers.

It should be noted that when the flue gas purification system provided in this example performs adsorption and purification of the flue gas, the NO _x components that are difficult to remove in the flue gas are oxidized to _NO by adsorption and removal at a low temperature through the mechanism of oxidation adsorption. It needs to inject _NH3 for catalytic reduction, and the operation cost is low. The flue gas purification system provided in this embodiment can absorb more than 99% of _NOx in the flue gas, and the denitrification efficiency is obviously better than the 70-80% denitrification efficiency in the prior art.

In describing the present disclosure, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", The orientations or positional relationships indicated by "radial", "circumferential", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying the referred devices or elements Must be in a particular orientation, constructed, and operate in a particular orientation, and thus should not be construed as limiting on the present disclosure.

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

In this disclosure, terms such as "installation", "connection", "connection" and "fixation" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection unless otherwise clearly defined and limited. , or integrated; can be mechanically connected, can also be electrically connected or can communicate with each other; can be directly connected, can also be indirectly connected through an intermediary, can be the internal communication of two components or the interaction relationship between two components, Unless expressly defined otherwise. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present disclosure according to specific situations.

In the present disclosure, unless otherwise clearly stated and limited, a first feature being "on" or "under" a second feature may mean that the first and second features are in direct contact, or that the first and second features are indirect through an intermediary. touch. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific examples," or "some examples" mean a specific feature, structure, material, or feature described in connection with the embodiment or example. Features are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present disclosure have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present disclosure, and those skilled in the art can understand the above-mentioned embodiments within the scope of the present disclosure. The embodiments are subject to changes, modifications, substitutions and variations.

Claims

A moving bed adsorption tower is characterized in that it comprises:

A tower body, the tower body has a cavity, the tower body is provided with a feeding port, a material outlet, a flue gas inlet and a flue gas outlet communicating with the cavity, and the cavity is in the flow direction of the flue gas It has an air inlet section, a packing section and a cloth section, and the packing section is used for filling the adsorbent;

A distributor, the distributor is arranged in the tower body, the distributor is provided with a number of blanking openings arranged at intervals, the distributor is located below the packing section so that the adsorbent in the packing section can pass through The discharge port flows out, and the several discharge ports include a first part and a second part, the discharge ports in the first part are arranged around the discharge ports in the second part, and the discharge ports in the first part The average cross-sectional area of the feed openings is larger than the average cross-sectional area of the feed openings in the second portion.
The moving bed adsorption tower according to claim 1, characterized in that, the cross-sectional areas of the several feeding openings increase sequentially from the inside to the outside.
The moving bed adsorption tower according to claim 1 or 2, wherein the distributor comprises a distribution plate, the discharge opening is arranged on the distribution plate, and the distribution plate and the surrounding wall of the cavity Connected, the flue gas inlet is located below the distribution plate, the distribution plate has a centerline extending in the vertical direction, the farther away from the centerline, the larger the cross-sectional area of the discharge opening.
According to the moving bed adsorption tower described in any one of claims 1 to 3, it is characterized in that several of the blanking ports are arranged in multiple rows, and each row of blanking ports includes a plurality of the blanking ports, and each row of blanking ports Several blanking openings in the mouth are arranged at intervals along the first direction, and multiple rows of blanking openings are arranged at intervals in the second direction, the first direction and the second direction are perpendicular to each other, and two adjacent rows of blanking openings are in the Align in the second direction.
The moving bed adsorption tower according to any one of claims 1 to 4, characterized in that, the section of the discharge opening is circular or square.
The moving bed adsorption tower according to claim 4, characterized in that, the interval between two adjacent blanking ports in the first direction is 20mm-100mm, and the interval between the adjacent two blanking ports in the second direction is The interval between the two feeding ports is 20mm-100mm.
The moving bed adsorption tower according to claim 3, characterized in that it also includes a plurality of downpipes, a plurality of said downpipes correspond to a plurality of said downholes one by one, and said downpipes are located at said There is a gap between the distribution plate and the distribution plate for flue gas flow, and the discharge pipe is located above the discharge port.
The moving bed adsorption tower according to claim 7, characterized in that the vertical dimension of the gap between the top of the downcomer and the lower end surface of the distribution plate is 20mm-100mm.
According to the moving bed adsorption tower described in any one of claims 1 to 8, it is characterized in that it also includes a distributor, the distributor is arranged in the tower body, and the distributor includes several distribution inlets and several The cloth outlet corresponding to the cloth inlet, the distributor is located below the feeding port and above the packing section, so as to distribute the adsorbent entering from the feeding port to the packing section, and the flue gas An outlet is located below the cloth inlet and above the cloth outlet.
A flue gas purification system is characterized in that it comprises:

A flue gas cooling device, the flue gas cooling device has a smoke inlet and a smoke outlet, and the flue gas cooling device is used to cool the flue gas entering from the smoke inlet to room temperature or below;

A moving bed adsorption tower, the moving bed adsorption tower is the moving bed adsorption tower according to any one of claims 1 to 9, the smoke outlet of the flue gas cooling device is connected to the moving bed adsorption tower of the moving bed adsorption tower The flue gas outlet is connected, and the moving bed adsorption tower is used to adsorb the flue gas.