WO2023079071A1

WO2023079071A1 - A device and method for purifying exhaust gas from a combustion process

Info

Publication number: WO2023079071A1
Application number: PCT/EP2022/080806
Authority: WO
Inventors: Horst Grochowski; Eddy-John FRANZISKUS
Original assignee: Horst Grochowski
Priority date: 2021-11-05
Filing date: 2022-11-04
Publication date: 2023-05-11
Also published as: CN216457869U

Abstract

Embodiments of the present disclosure provide a device for purifying exhaust gas of a combustion process. The device comprises at least one multi-stage purification module, and each multi-stage purification module includes three or more purification modules, adsorption and/or absorption agent conveying pipeline systems, and intermediate plates between two adjacent purification modules. The purification modules are arranged in a sequentially stacked manner in the vertical direction, and can perform the purification of exhaust gas independently of each other. The adsorption and/or absorbent conveying pipeline system pentrates each multi-stage purification module, and is used to supply fresh adsorption and/or absorbent, and to discharge the used adsorption and/or absorbent from the purification module. The above device has the advantages of small floor space, high working efficiency and high flexibility.

Description

A DEVICE AND METHOD FOR PURIFYING EXHAUST GAS FROM A COMBUSTION PROCESS

FIELD

[0001] The embodiments of the present disclosure generally relate to the field of environmental protection equipment, and more specifically, to a device, and to a method, for purifying exhaust gas of a combustion process according to the preamble of claim 1 respectively 11.

BACKGROUND

[0002] In the metal preparation process, it is necessary to bum ore materials. During the sintering process of ore materials, a large number of pollutants are generated, including nitrogen oxides (NOx), sulfur dioxide (SO2), hydrogen chloride (HC1), dioxins, and furans, dust, and sublimation or condensable residues, heavy hydrocarbons and/or heavy metals produced by the smoldering of ore materials. Due to the huge amount of exhaust gas produced by the ore material sintering belt, the purification of the exhaust gas will greatly increase the cost of steel production. In addition, the composition of the exhaust gas produced by the sintering belt will change from time to time with the use of ore materials. Different pollutants require different purification and recovery methods. Therefore, the exhaust gas treatment needs to successively implement multiple purification steps.

[0003] CN101605589A provided a moving bed reactor for purifying exhaust gas produced by the sintering process. The moving bed reactor has a double-stage structure and consists of two moving bed reactors stacked in a vertical direction. The two moving bed reactors are arranged to be independent of each other, and the input and output of the sintering exhaust gas are independent of each other and cannot circulate with each other.

[0004] When the above-mentioned sintering exhaust gas purification device is applied to a large-scale factory with a large amount of exhaust gas treatment, multiple exhaust gas purification devices need to be built in the horizontal direction, so there are problems of excessively large area and high cost. Especially in tall and large factories, the vertical space cannot be effectively used, resulting in a waste of space and increasing the construction cost of the factory. SUMMARY

[0005] Embodiments of the present disclosure provides a device for purifying exhaust gas of a combustion process, so as to at least partially solve the above-mentioned problems in the prior art.

[0006] A device for purifying exhaust gas from a combustion process including at least one multi-stage purification module. Each multi-stage purification module comprises: three or more purification modules, which are arranged in a sequentially stacked manner in the vertical direction, and can purify exhaust gas independently of each other; adsorption and/or absorption agent conveying pipeline system, which is arranged to substantially penetrate each multi-stage purification module in the vertical direction, and includes a supplying pipeline and a discharging pipeline, which are suitable for supplying fresh adsorption and/or absorption agent to each purification module, and will discharge the adsorption and/or absorption agent which at least partially adsorb exhaust gas from each purification module; and the intermediate plate, which is arranged between two adjacent purification modules in the vertical direction, and is shaped to be a funnel with an opening at the bottom, thereby collecting the adsorption and/or absorption agent discharged from at least one purification module located above the intermediate plate and discharged them through the opening; the intermediate plate is also arranged to totally separate the fresh adsorption and/or absorption agent supplied to the purification module located below the intermediate plate, and the adsorption and/or absorption agent discharged from at least one purification module located above the intermediate plate. The supplying pipeline of the adsorption and/or absorption agent conveying pipeline system is arranged such that, for each purification module in each multi-stage purification module, other than the purification module of the top layer, the supplying pipeline extends through all purification modules located above one purification module, and supplies fresh adsorption and/or absorption agent to the one purification module. The discharging pipeline of the adsorption and/or absorption agent conveying pipeline system is arranged such that, for each purification module in each multi-stage purification module, other than the purification module of the bottom layer, the discharge pipeline extends through all purifications located below one purification module, and discharges the adsorption and/or absorption agent which at least partially adsorb or absorb exhaust gas from one purification module. [0007] In this way, in the vertical direction, more purification modules are stacked together, so as to reduce the floor area of the sintering exhaust gas purification equipment, making full use of the space of the metal preparation plant, and to reduce the construction cost of the plant, improving the effect of sintering exhaust gas purification rate. In addition, the embodiments of the present disclosure also improve the structure of the reaction device and the layout of the adsorption and/or absorption agent conveying pipeline system to realize the supply and discharge of the adsorption and/or absorption agent in a simple and efficient manner.

[0008] In some embodiments, the adsorption and/or absorption agent conveying pipeline system may be arranged such that: for each purification module, an independent supply line and discharge line are provided; wherein the supplying line may be arranged inside the multistage purification module group, to totally separate the fresh adsorption and/or absorption agent supplied to each purification module from the fresh adsorption and/or absorption agent supplied to other purification modules; wherein the discharging pipeline can be arranged inside the multi-stage purification module, to totally separate the adsorption and/or absorption agent which have at least partially adsorbed and/or absorbend exhaust gas and discharged from each purification module from the adsorption and/or absorption agent which have at least partially ad- and/or absorbed exhaust gas and discharged from other purification modules.

[0009] In some embodiments, the adsorption and/or absorption agent conveying pipeline system may be arranged such that: the supplying pipeline may include: at least one material supplying main pipe that penetrates all purification other than the purification module of the bottom layer; and the distribution branch pipe, which is arranged to crossly link with the material supplying main pipe, so as to supply the fresh adsorption and/or absorption agent to at least one purification module; and the discharging pipeline may include: multiple material discharging pipeline sections, each discharging pipe section is arranged to extend downward from the opening at the bottom of one of the intermediate plates, pass through at least one purification module, and link with another material discharging pipeline section in the adjacent purification module under at least one purification module, so that the adsorption and/or absorption agent which at least partially ad- and/or absorbed the exhaust gas and are discharged from one of the intermediate plates, are guided into the another material discharging pipeline section. [0010] In some embodiments, the supplying pipeline may further include at least one distribution node, which is arranged as an swell portion on the material supplying main pipe, and each distribution node is provided with at least one distribution opening; wherein distribution branch pipe extends downwards and tiltedly relative to the vertical direction, from the distribution opening, thereby supplying the fresh adsorption and/or absorption agent to the purification module.

[0011] In some embodiments, the distribution node may be arranged in a funnel formed in the intermediate plate, and the distribution branch pipe may extend from the distribution node through the corresponding intermediate plate, thereby supplying fresh adsorption and/or absorption agent to the adjacent purification module located below the intermediate plate; and the funnel part construed corresponding to the intermediate plate of the material supplying main pipe and the material discharging pipeline section, is arranged to be a bending part.

[0012] In some embodiments, in all purification modules other than the purification module of the top and bottom layer, the material supplying main pipe and the material discharging pipeline section extending through the purification module may be arranged in parallel with and adjacent to each other.

[0013] In some embodiments, the adsorption and/or absorption agent conveying pipeline system may be arranged such that: the supplying pipeline may include: at least one material supplying main pipe arranged to penetrate all the purification modules other than the purification module at the bottom in a substantially straight manner along the vertical direction; and the distribution branch pipe is arranged to crossly link with the material supplying main pipe so as to supply fresh adsorption and/or absorbent to at least one purification module; and the discharging pipeline may include: multiple material discharging pipeline sections, each material discharging pipeline section is arranged to extend downward from an opening at the bottom of one of the intermediate plates in a substantially straight manner along the vertical direction passing one purification module to reach near the opening of another intermediate plate so that the adsorption and/or absorption agent which at least partially adsorbed and/or absorbed the exhaust gas and are discharged from one of the intermediate plates is guided into the opening of another intermediate plate.

[0014] In some embodiments, the supplying pipeline may further include: at least one distribution node configured as an swell portion on the material supplying main pipe, and each distribution node is arranged to have at least one distribution opening; wherein the distribution branch pipe extends downward in the vertical direction from the distribution opening, so as to supply fresh adsorption and/or absorption agent to the purification module.

[0015] In some embodiments, the distribution node may be arranged above one of the intermediate plates, and the distribution branch pipe may extend from the distribution node through the corresponding intermediate plate, thereby supplying fresh adsorption and/or absorption agent to the adjacent purification module located below the intermediate plate.

[0016] In some embodiments, in all purification modules other than the purification module of the top and bottom layer, the material supplying main pipe and the material discharging pipeline section extending to pass the purification module may be arranged to be adjacent to and in parallel with each other.

[0017] The embodiments of the present disclosure can achieve at least one of the following beneficial effects:

[0018] 1. Reducing the floor space and overall weight of the sintering exhaust gas purification equipment, making full use of the space of the metal preparation plant, reducing the construction cost of the plant, and improving the effect of sintering exhaust gas purification rate.

[0019] 2. Each multi-stage purification module can be controlled and operated independently of each other. In some embodiments, each purification module can also be controlled and operated independently of each other, thereby improving the flexibility of the overall equipment control and operation.

[0020] 3. Reducing the energy consumed by the operation of exhaust gas purification equipment, especially the energy required to drive the exhaust gas to flow in the pipeline.

[0021] 4. The unique pipeline system layout is convenient for conveying activated carbon and automatically controlling the conveying process, and has the advantages of simple wiring, which helps to reduce the overall length and weight of the pipeline system and to reduce the cost of the system.

[0022] It should be understood that the summary part of this application is not intended to identify the key or important features of the embodiments of the present disclosure, nor does it intended to limit the scope of the present disclosure. Other features of the present disclosure will be easily understood by the following description.

DESCRIPTION OF DRAWINGS

[0023] Hereinafter, by describing the example embodiments of the present disclosure in more detail with reference to the accompanying drawings, the above-mentioned objects and other objects, features, and advantages of the present disclosure will become more apparent. Among the exemplary embodiments of the present disclosure, the same reference symbols are usually used to indicate the same parts.

[0024] FIG. 1 illustrates a schematic sectional view of a multi-stage purification module according to an embodiment of the present disclosure;

[0025] FIG. 2 illustrates a schematic sectional view of a multi-stage purification module according to another embodiment of the present disclosure; and

[0026] FIG. 3 a schematic sectional view of a multi-stage purification module according to one more another embodiment of the present disclosure;

DETAILED DESCRIPTION OF EMBODIEMTNS

[0027] The principles of the present disclosure will now be explained with reference to various example embodiments shown in the drawings. It should be understood that the description of these embodiments is only for enabling those skilled in the art to better understand and further implement the present disclosure, and is not intended to limit the scope of the present disclosure in any way. It should be noted that similar or identical reference symbols may be used in the figures where feasible, and similar or identical reference symbols may indicate similar or identical functions. Those skilled in the art will readily recognize that from the following description, alternative embodiments of the structures and methods described herein can be adopted without departing from the principles of the present disclosure described herein.

[0028] As has been briefly described above, the present disclosure aims to provide a device for purifying exhaust gas from a combustion process, which can purify exhaust gas with a smaller space and less energy consumption. In general, the present disclosure makes full use of the space in the height direction of the factory building by arranging more purification modules in the vertical direction in a sequential stacking manner, thereby achieving the effect of reducing floor space. In addition, this arrangement also helps to reduce the energy consumption for exhaust gas purification. For the normal operation of the device, the present disclosure also provides a unique adsorption and/or absorption agent conveying pipeline system to supply the adsorption and/or absorption agent required by the purification process to each purification module, and the used adsorption and/or the absorption agent is discharged from the purification module. Now referring to FIG. 1 to FIG. 3, some example embodiments of the apparatus for purifying exhaust gas of a combustion process according to the present disclosure will be described.

[0029] FIG. 1 shows a schematic sectional view of a multi-stage purification module group 100 according to an embodiment of the present disclosure. It can be understood that the device for purifying exhaust gas of a combustion process according to an embodiment of the present disclosure may include one or more such multi-stage purification module groups 100. These multi-stage purification module groups 100 can be positioned in a certain arrangement (for example, arranged in a row or in multiple rows in parallel) to form a purification device. Functionally, each multi-stage purification module group 100 can complete the task of exhaust gas purification independently of each other.

[0030] As shown in FIG. 1, the multi-stage purification module group 100 includes three purification modules 110, 120, and 130. The three purification modules 110, 120, and 130 may have the same or substantially the same structure, and are arranged in a sequential stacked manner in the vertical direction, and can perform the purification of exhaust gas independently of each other. It should be understood that in order to better achieve the effect of reducing floor space, more (more than three) purification modules can be stacked in the vertical direction.

[0031] In addition, in the present disclosure, the terms "stage" and "layer" may be used interchangeably. "Multi-stage purification module" means a purification module group has multiple layers of purification modules, specifically, three or more layers of purification modules.

[0032] The specific structure of each purification module 110, 120, and 130 can be the same as each other or different from each other, as long as they can be arranged in the same multi-stage purification module group 100 in a stacked manner, and can be independent of each other when purifying exhaust gas. As shown in FIG. 1, the arrow IN indicates that the exhaust gas to be purified is guided to enter from the lower part of each purification module 110, 120, and 130, and the arrow OUT indicates that the purified exhaust gas are respectively discharged from the upper part of each purification module 110, 120, and 130. The purification module can adopt a known structure, such as a moving bed reactor module or a single reactor assembly disclosed in the applicant's patents CN101605589A, CN101909737B, US7198767B1 and EP0357653B1. The contents of the above-mentioned patents are included in the contents of this disclosure by reference.

[0033] In order to purify the exhaust gas, it is necessary to use adsorbents (or adsorption agents) and/or absorbents (or absorption agents) in the form of bulk materials. The adsorption and/or absorbent can be, for example, activated carbon, catalyst, calcium hydroxide and/or other bulk materials with adsorption and/or absorption functions. These materials can adsorb and/or absorb the toxic and harmful components in the exhaust gas produced by the metal preparation process. These materials also have a certain degree of fluidity and can be transported to a specific location in the multi-stage purification module group 100 through a pipeline. It should be understood that the present disclosure does not limit the specific type and composition of the adsorbent and/or absorbent.

[0034] The multi-stage purification module group 100 also includes an adsorption and/or absorption agent conveying pipeline system (hereinafter referred to as the "pipeline system") 140. As shown in FIG. 1, the pipeline system 140 is arranged to substantially penetrate through the respective purification modules 110, 120 and 130 of the multi-stage purification module group 100 in the vertical direction. The pipeline system 140 includes supplying pipelines 141, 142, and 143 and discharging pipelines 144, 145, and 146.

[0035] The supplying pipeline according to the embodiment of the present disclosure is characterized by being able to supply fresh adsorption and/or absorption agent to each purification module. For example, in the embodiment shown in FIG. 1, the supply line 141 is arranged to supply fresh adsorption and/or absorption agent (for example, activated carbon) to the purification module 110 on the top layer. The supply line 142 is arranged to extend through the purification module 110 on the top layer, supplying fresh adsorption and/or absorption agent (for example, activated carbon) to the purification module 120 in the middle. The supply line 143 is arranged to extend through the purification module 110 on the top layer and the purification module 120 in the middle, supplying fresh adsorption and/or absorption agent (for example, activated carbon) to the purification module 130 on the bottom layer. It can be seen that for the purification modules 120 and 130 of the multi-stage purification module group 100 other than the purification module 110 on the top layer, the supply lines 142 and 143 corresponding to each purification module extend through all the purification modules located above the target purification module, supplying fresh adsorption and/or absorption agent to target purification modules 120 and 130.

[0036] In addition, the discharge pipeline according to the embodiment of the present disclosure is characterized in that it can remove the adsorbent and/or absorbent (or called "loaded adsorbent and/or absorbent") which have at least partially adsorbed and/or absorbed exhaust gas from each purification module is discharged from each purification module. For example, in the embodiment shown in FIG. 1, the discharging pipeline 144 is arranged to extend through the purification modules 120 and 130 to the outside of the multi-stage purification module group 100 to discharge the loaded adsorption and/or absorbent from the purification module on the top layer 110. The discharging pipeine 145 is arranged to extend through the purification module 130 to the outside of the multi-stage purification module group 100 to discharge the loaded adsorption and/or absorption agent from the intermediate purification module 120. The discharge line 146 is arranged under the purification module 130 at the bottom layer, and discharges the loaded adsorption and/or absorption agent from the purification module 130 in the middle. It can be seen that for the purification modules 110 and 120 of the multi-stage purification module group 100 other than the purification module 130 at the bottom, the discharge lines 144 and 145 corresponding to each purification module extend through all the purification modules located under the target purification module, discharging the loaded adsorption and/or absorption agent from the target purification modules 110 and 120.

[0037] As shown in FIG. 1, the multi-stage purification module group 100 also includes intermediate plates 150 and 150' located between two adjacent purification modules in the vertical direction, wherein the intermediate plate 150 is located between the purification modules 110 and 120. The intermediate plate 150' is located between the purification modules 120 and 130. The intermediate plates 150 and 150' are shaped to be funnels with openings 151, 151' at the bottom. The funnel-shaped intermediate plates 150 and 150' are used to collect the loaded adsorption and/or absorption agent discharged from the purification module above the intermediate plate (including the purification module immediately above the intermediate plate or other purification modules above this purification module) and discharge it from the opening of the intermediate plate. In addition, the space above the intermediate plates 150 and 150' can be used to collect the loaded adsorption and/or absorption agent, and the space below the intermediate plates 150 and 150' can be used to contain fresh adsorption and/or absorption agent. That is, the structure of the intermediate plate 150 can totally separate the fresh adsorption and/or absorption agent supplied to the purification module 120 located below the intermediate plate 150 from the loaded adsorption and/or absorption agent discharged from the purification module 110 located above the intermediate plate 150; the structure of the intermediate plate 150' can totally separate the fresh adsorption and/or absorption agent supplied to the purification module 130 located below the intermediate plate 150' from the loaded adsorption and/or absorption agent discharged from the purification module 120 located above the intermediate plate 150'.

[0038] It should be understood that although the intermediate plates 150 and 150' shown in FIG. 1 respectively include two funnel-shaped portions and two corresponding bottom openings 151, 15T, in other embodiments, the intermediate plates 150 and 150 ' can include more or fewer funnel-shaped portions and corresponding bottom openings, for example, each intermediate plate can include one, three, four, five, or more funnel-shaped portions. Each funnel-shaped part can also include one or more openings.

[0039] In the embodiment shown in FIG. 1, for each purification module, supplying pipelines and discharging pipelines can be provided independently. Specifically, for the purification module 110, the pipeline 141 is used to supply fresh adsorption and/or absorption agent, and the pipeline 144 is used to discharge the loaded adsorption and/or absorption agent; for the purification module 120, the pipeline 142 is used to supply fresh adsorption and/or absorption agent and the pipeline 145 is used to discharge the loaded adsorption and/or absorption agent;. For the purification module 130, the pipeline 143 is used to supply fresh adsorption and/or absorption agent, and the line 146 is used to discharge the loaded adsorption and/or absorption agent.

[0040] Taking the purification module 120 as an example, its supplying pipeline 142 enters from above the multi-stage purification module group 100 and extends through the purification module 110 on the top layer. In the funnel shape formed in the intermediate plate 150, the lower end of the supply line 142 is divided into two inverted "V"-shaped branch pipes. Fresh adsorbent and/or absorbent can enter the purification module 120 from the two branch pipes respectively. The loaded adsorption and/or absorption agent can be collected by the funnel shape formed in the intermediate plate 150', entering the discharging line 145 through the opening 151' at the bottom of the intermediate plate 150', and finally be discharged to the outside of the multi-stage purification module group 100.

[0041] The pipeline 141 and the pipeline 144 constitute a group of pipelines, the pipeline 142 and the pipeline 145 constitute a group of pipelines, and the pipeline 143 and the pipeline 146 constitute a group of pipelines. Each group of pipelines are not connected to each other, and neither the adsorption and/or absorption agent nor the exhaust gas can flow between different group of pipelines. That is, inside the multi-stage purification module group 100, the pipeline system 140 can totally seperate the fresh adsorption and/or absorption agent supplied to each purification module with the fresh adsorption and/or absorption agent supplied to other purification modules. At the same time, the pipeline system 140 can also totally separate the loaded adsorption and/or absorption agent discharged from each purification module from the loaded adsorption and/or absorption agent discharged from other purification modules.

[0042] The multi-stage purification module group 100 adopting such a pipeline system 140 has the advantages of saving space and energy consumption. Due to the unique and independent supplying pipeline and discharging pipeline, each purification module can be independently controlled. The working status of a purification module (for example, normal operation or shutdown due to failure) will not affect the normal operation of other purification modules, thereby improving the flexibility of the overall device operation.

[0043] It should be understood that in different embodiments, the pipeline system may be arranged in various ways. In other embodiments, a pipeline system different from the pipeline system 140 shown in FIG. 1 may be used.

[0044] In some embodiments, for example, referring to FIG. 2, the multi-stage purification module 200 may include four purification modules 210, 220, 230, and 240 which are arranged in a sequentially stacked manner. Intermediate plates 250, 250’ and 250" are arranged between every two adjacent purification modules.

[0045] In the multi-stage purification module 200, the supplying pipeline 270 of the pipeline system 260 may include at least one material supplying main pipe 271 (two material supplying main pipes 271 are schematically shown in FIG. 2). The material supplying main pipe 271 can enter from above the multi-stage purification module 200, penetrating the three purification modules 210, 220, 230, and finally, for example, can reach the funnel shape of the intermediate plate 250" above the purification module 240.

[0046] The supplying pipeline 270 may also include a distribution branch pipe 272 that is in crossly linked with the material supplying main pipe 271. For example, as shown in FIG. 2, for each purification module, two distribution branch pipes 272 can be divided from one material supplying main pipe 271. Fresh adsorption and/or absorption agent can be supplied to each purification module through the distribution branch pipes 272.

[0047] The discharging pipeline 280 may also include multiple material discharging pipeline sections 281, 282, 283. Taking the material discharging pipeline section 281 as an example, the material discharging pipeline section 281 may be arranged to extend downward from the opening 251 at the bottom of the intermediate plate 250 through the purification module 220 under the intermediate plate 250, and to be in contact with another material discharging pipeline section 282 inside the purification module 230. As shown in FIG. 2, the material discharging pipeline sections 281 and 282 merge at a point P, and the material discharging pipeline section 281 ends at this point P and no longer extends downward. In this way, the loaded adsorption and/or absorption agent discharged from the purification module 210, after being collected and discharged by the intermediate plate 250, passes through the purification module 220 via the material discharging pipeline section 281, and merges with loaded adsorption and/or absorption agent phase of the module 220 discharged from the purification module 220 in the purification module 230.

[0048] Similarly, the material discharging pipeline section 282 can be arranged to extend downward from the opening 251' at the bottom of the intermediate plate 250' through the purification module 230 under the intermediate plate 250', and to be connected to another discharging pipe sections 283 in the purification module 240. As shown in Figure 2, the material discharging pipeline sections 282 and 283 merge at point P', and the material discharging pipeline section 282 ends at this point P' and no longer extends downwards. [0049] The pipeline system 260 of the multi-stage purification module 200 may have fewer pipelines than the pipeline system 140 shown in FIG. 2. Unlike the pipeline system 140 that provides independent supplying pipelines and discharging pipelines for each purification module, the supply line 270 of the pipeline system 260 can provide fresh adsorption and/or absorption agent to almost all of the purification modules through a material supplying main pipe 271 (through communication with the distribution branch pipe 272). The discharging pipeline 280 takes the form of multiple material discharging pipeline sections 281, 282, 283. The loaded adsorption and/or absorption agent discharged by the purification module of the upper layer can be guided to merge with the loaded adsorption and/or adsorption agent discharged by the purification module of the next layer, instead of being discharged out of the multi-stage purification module 200 through a separate long pipeline extending all the way down.

[0050] Such a pipeline system 260 can have a smaller number of pipelines and a shorter pipeline length, which is beneficial to the simplicity of pipeline layout and helps reduce the overall weight and cost of the pipeline system 260. Such a pipeline system 260 is particularly advantageous for multi-stage purification modules group which includes multi-layer purification modules (for example, four layers or more).

[0051] It should be understood that although in the embodiment shown in FIG. 2, each material discharging pipeline section is arranged to link with the material discharging pipeline section immediately below it, (for example, the material discharging pipeline section 281 links with the material discharging pipeline section 282 at Point P, and the material discharging pipeline section 282 is in communication with the material discharging pipeline section 283 at point P') , and the material discharging pipeline section can also be arranged to further extend downward passing a purification module, thereby connecting to the second material discharging pipeline section below it. For example, the material discharging pipeline section 281 may be arranged to extend through the two purification modules 220 and 230, and finally link with the material discharging pipeline section 283 at point P'. Further, in the case where more purification modules are arranged in a stacked manner to form a multi-stage purification module group, one material discharging pipeline section can also extend downward through more purification modules, and finally be connected with the other discharging pipeline sections. [0052] In some embodiments, for example, as shown in FIG. 2, the supplying pipeline 270 may further include a distribution node 273. The distribution node 273 may be arranged as an swell portion on the material supplying main pipe. This can be achieved, for example, by passing a part of the material supplying main pipe 271 through an expansion method, or by connecting a separate component with a diameter larger than the diameter of the material supplying main pipe 271 to the material supplying main pipe 271, or by other existing parts, or by other known methods. This disclosure does not limit this. At least one distribution opening 274 may be provided on each distribution node 273. The distribution branch pipe 272 may be arranged to extend from the distribution opening 274 downwards and tiltedly in relative to the vertical direction, so as to supply fresh adsorption and/or absorption agent to the purification module. For example, as shown in FIG. 2, for each distribution node 273, two distribution branch pipes 272 are arranged in an inverted "V" shape, and fresh adsorption and/or absorption agent are supplied to the purification module below the distribution node 273.

[0053] In this way, the material supplying main pipe 271 and the distribution branch pipes 272 can be easily connected, the wiring process of the pipeline can be simplified, and the fresh adsorption and/or absorption agent can be conveniently supplied through the material supplying main pipe 271 and the distribution branch pipes 272 to each purification module.

[0054] In some embodiments, for example, as shown in FIG. 2, the distribution node 273 may be arranged in the funnel shape formed in the intermediate plates 250, 250', and 250", and the distribution branch pipe 272 may extend from the distribution node 273 to go through the corresponding intermediate plates 250, 250' and 250" to supply fresh adsorption and/or absorption agent to the adjacent purification module located below the intermediate plates 250, 250' and 250".

[0055] In addition, in other embodiments, for example, as shown in FIG. 2, the portion of the material supplying main pipe 271 corresponding to the funnel shape formed in the intermediate plates 250, 250', and 250" may be arranged as the bending portion 275. By providing such a bending portion 275, it is possible to prevent the material supplying main pipe 271 from blocking the openings 251, 251' and 251" at the bottom of the intermediate plates 250, 250' and 250", thereby ensuring the loaded adsorbent and/or absorbent the load recovered from the purification modules of each layer can smoothly fall into the funnel- shaped part, and finally be smoothly discharged from the openings 251, 251' and 251" at the bottom of the intermediate plates 250, 250' and 250".

[0056] Similarly, in other embodiments, for example, as shown in FIG. 2, each material discharging pipe section corresponding to the funnel-shaped part formed in the intermediate plates 250, 250', and 250" can also be arranged to be bending portion 284. The bending portion 284 can also play a role in preventing the discharge pipe from blocking the opening at the bottom of the intermediate plate in sections.

[0057] In some other embodiments, in all the purification modules other than the purification modules of the top and bottom layer, that is, the purification modules 220 and 230 that the material supplying main pipe 271 coexists with the material discharging pipeline sections 281 and 282, the material supplying main pipe 271 and the material discharging pipeline sections 281 and 282 may be arranged to extend in parallel with and adjacent to each other. This arrangement is more concise and compact, and helps the material supplying main pipe 271 and the material discharging pipeline sections 281 and 282 extend through other structures in the purification modules 220 and 230 without mutual interference.

[0058] Refer to FIG. 3, which shows a schematic sectional view of a multi-stage purification module 300 according to one more another embodiment of the present disclosure. The multi-stage purification module 300 may include four purification modules 310, 320, 330, and 340 arranged in a stacking manner in sequence. Intermediate plates 350, 350' and 350" are arranged between every two adjacent purification modules.

[0059] In this embodiment, the supplying pipeline 370 of the pipeline system 360 may include at least one material supplying main pipe 371 (two material supplying main pipes 371 are schematically shown in FIG. 3). The material supplying main pipe 371 can enter from above the multi-stage purification module 300, penetrating the three purification modules 310, 320, 330, and finally, for example, can reach the funnel-shaped part of the intermediate plate 350" above the purification module 340.

[0060] Compared with the material supplying main pipe 271 in FIG. 2, the material supplying main pipe 371 in FIG. 3 is different in that it extends in a substantially straight manner along the vertical direction. Such a straight material supplying main pipe 371 helps to improve the efficiency and speed of adsorption and/or absorption agent supply, and at the same time helps to reduce unintended loss caused by the collision between the adsorption and/or absorption agent and the comers or bends of the pipeline.

[0061] Similar to the embodiment shown in FIG. 2, the supplying pipeline 370 may further include a distribution branch 372. The distribution branch pipe 372 may be arranged to crossly communicate with the material supplying main pipe 371, so as to supplying fresh adsorption and/or absorption agent to the purification module.

[0062] The discharging pipeline 380 may include multiple material discharging pipeline sections 381, 382, and 383. Taking the material discharging pipeline section 381 as an example, it can be arranged to extend from the opening 351 at the bottom of the intermediate plate 350 in a substantially straight manner along the vertical direction downward through one purification module 320, and finally reach near the opening 35 T of the other intermediate plate 350'. The loaded adsorption and/or absorption agent discharged from the opening 351 at the bottom of the intermediate plate 350 is guided into the opening 35 T of the other intermediate plate 350' via the material discharging pipeline section 381. Similarly, the loaded adsorption and/or absorption agent discharged continues to be guided via the material discharging pipeline section 382 into the opening 351" of the other intermediate plate 350", and is finally discharged through the material discharging pipeline section 383 .

[0063] In this way, the loaded adsorption and/or absorption agent discharged from the purification module located on the upper part of the multi-stage purification module 300 can be discharged downward layer by layer in such a "relay" or "transfer" manner, and finally be discharged to the outside of the multi-stage purification module 300.

[0064] Similar to the embodiment of FIG. 2, the pipeline system 360 shown in FIG. 3 can have a smaller number of pipelines and a shorter pipeline length, which is beneficial to the simplicity of pipeline layout and helps reduce the overall weight and cost of the pipeline system 360. Such a pipeline system 360 is particularly advantageous for a multi-stage purification module group including multiple layers of purification modules (for example, four layers or more). In addition, since the supplying pipeline 370 and the discharge pipeline 380 of the pipeline system 360 are more linear structures, it helps to improve the efficiency of the adsorption and/or absorption agent delivery and reduce the loss.

[0065] In some embodiments, similar to the supply line 270, the supply line 370 may also include a distribution node 373. The distribution node 373 may be arranged as an swell portion on the material supplying main pipe 371. At least one distribution opening 374 may be provided on each distribution node 373. The distribution branch pipe 372 extends from the distribution opening 374 downwards and tiltedly in relative to the vertical direction, so as to supply fresh adsorption and/or absorption agent to the purification module.

[0066] In some embodiments, for example, as shown in FIG. 3, the distribution node 373 may be arranged above the intermediate plate. The distribution branch pipe 372 can extend from the distribution node 373 through the corresponding intermediate plates 350, 350' and 350", thereby supplying fresh adsorption and/or absorption agent to the adjacent purification module located below the intermediate plates 350, 350' and 350".

[0067] In some other embodiments, in all the purification modules other than the purification modules of the top and bottom layer, that is, the purification modules 320 and 330 where the material supplying main pipe 371 coexists with the material discharging pipeline sections 381 and 382, the material supplying main pipe 371 and the material discharging pipeline sections 381 and 382 may be arranged to extend in parallel with and adjacent to each other. This arrangement is more concise and compact, and helps the material supplying main pipe 371 and the material discharging pipeline sections 381 and 382 can extend through other structures in the purification modules 320 and 330 without mutually interfering.

[0068] It should be understood that the embodiments of the present disclosure are not limited to the three-layer or four-layer purification module shown in FIG. 1 to 3. According to the gist of the present disclosure, the pipeline system can be applied to a purification module with three or more layers, for instance four, five, six, seven, eight or more layers.

[0069] According to an embodiment of the present disclosure, the multi-stage purification module composed of three or more layers of purification modules can arrange as many purification modules as possible in the height direction, thereby reducing the footprint of the equipment. Compared with the two-layer purification module, the purification module including the three-layer purification module can reduce the floor space by about 33%.

[0070] In addition, the multi-stage purification module according to the embodiment of the present disclosure also helps to reduce the energy consumed in the exhaust gas purification process, especially the energy required to drive the exhaust gas to flow in the pipeline (for example, the electronic energy that the blower in the pipeline required). [0071] In a purification module that includes a three-layer purification module, the exhaust gas to be purified is divided into three parts. This means that for a purification module that includes three-layer purification modules, each purification module only receives and processes 1/3 of the total exhaust gas volume (in a two-layer purification module, each purification module only receives and processes the total exhaust gas volume 1/2). Compared with the two-layer purification module, the exhaust gas flow rate in each of the three purification modules is reduced to 66%. In this case, in order to make the residence time of the exhaust gas in the adsorption and/or absorption agent the same as the residence time in the two-layer purification module, the height of the adsorption and/or absorption agent in each purification module is also correspondingly reduced to 66%. The pressure drop of the exhaust gas flow in each purification module is proportional to the height of the adsorption and/or absorption agent, and proportional to the square of the exhaust gas flow rate. Therefore, the exhaust gas flow pressure drop in each purification module (compared to the two-layer purification module) can be reduced to 66% x (66%)2 = 28%. The energy consumption of the blower in the exhaust gas pipeline is proportional to the pressure drop of the exhaust gas flow. Therefore, the energy consumption of the blower of the purification module of the three-layer purification module is only 28% of the energy consumption of the two-layer purification module.

[0072] It should be understood that the above detailed embodiments of the present disclosure are only for exemplifying or explaining the principle of the present disclosure, rather than limiting the present disclosure. Therefore, any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present disclosure should be included in the protection scope of the present application. At the same time, the claims attached to the present disclosure are intended to cover all changes and modifications that fall within the scope and boundary of the claims or the equivalents of the scope and boundary.

Claims

1. A device for purifying exhaust gas from a combustion process, characterized in that, including: at least one multi-stage purification module group (100), each of said multistage purification module groups (100) comprises: three or more purification modules (110, 120, 130) arranged in a stacked manner in the vertical direction, and each of the purification modules (110, 120, 130) is adapted to purify said exhaust gas independently, an adsorption and/or absorption agent conveying pipeline system arranged to extend through each of said multi-stage purification module groups (110, 120, 130) substantially in said vertical direction, and comprising a supplying pipeline (141, 142, 143) and a discharging pipeline (144, 145, 146) adapted to supply fresh adsorption and/or absorption agent to each of said purification modules (110, 120, 130) and to discharge the adsorption and/or absorption agent at least partially adsorbing and/or absorbing said exhaust gas from each of said purification modules (110, 120, 130); and an intermediate plate (150, 150') arranged between two adjacent purification modules (110, 120, 130) in the vertical direction, and substantially in the form of a funnel with an opening (151, 151') at the bottom, thereby collecting the adsorption and/or absorption agent discharged from at least one of said purification modules (110, 120, 130) located above said intermediate plate (150, 150'), and discharging it through said opening (151, 151'); said intermediate plate (150, 150') further arranged to separate the fresh adsorption and/or absorption agent supplied to the purification module (110, 120, 130) below said intermediate plate (150, 150') from the adsorption and/or absorption agent discharged from at least one of said purification modules (110, 120, 130) above said intermediate plate (150, 150'); wherein said supplying pipeline (141, 142, 143) of said adsorption and/or absorption agent conveying pipeline system is arranged to: for one of said purification modules (120, 130) other than the top purification module (110) in each of the multi-stage purification module groups (100), extend through all the purification modules located above said one purification module, to supply the fresh adsorption and/or absorption agent to said one purification module; and wherein said discharging pipeline (144, 145, 146) of said adsorption and/or absorption agent conveying pipeline system is arranged to: for one of said purification modules (110, 120) other than the bottom purification module (130) in each of the multi-stage purification module groups (100), extend through all the purification modules located below said one purification module, to discharge the adsorption and/or absorption agent at least partially adsorbing and/or absorbing said exhaust gas from said one purification module.

2. The device for purifying exhaust gas from a combustion process of claim 1, characterized in that, said adsorption and/or absorption agent conveying pipeline system is arranged to: provide independent said supplying pipeline and said discharging pipeline for each of said purification modules; wherein said supplying pipeline is arranged to separate the fresh adsorption and/or absorption agent supplied to each of said purification modules from the fresh adsorption and/or absorption agent supplied to other purification modules in said multi-stage purification module group; wherein said discharging pipeline is arranged to separate the adsorption and/or absorption agent at least partially adsorbing said exhaust gas and discharged from each of said purification modules from the adsorption and/or absorption agent at least partially adsorbing said exhaust gas and discharged from other purification modules in said multi-stage purification module group.

3. The device for purifying exhaust gas from a combustion process of claim 1, characterized in that, said adsorption and/or absorption agent conveying pipeline system is arranged such that: said supplying pipeline comprises: at least one material supplying main pipe extending through all the purification modules other than the bottom purification module; and a distribution branch pipe arranged to be cross-connected to said material supplying main pipe, thereby supplying the fresh adsorption and/or absorption agent to at least one of said purification modules; and said discharging pipeline comprises: a plurality of material discharging pipeline sections, each of said material discharging pipeline sections is arranged to extend downwards, from said opening at the bottom of one of said intermediate plates, through at least one of said purification modules, and materially be coupled to another material discharging pipeline section inside an adjacent purification module below said one purification module, thereby discharging the adsorption and/or absorption agent at least partially adsorbing said exhaust gas and discharged from said intermediate plate into said another material discharging pipeline section.

4. The device for purifying exhaust gas from a combustion process of claim 3, characterized in that, said supplying pipeline further includes: at least one distribution node in the form of a swell portion in said material supplying main pipe, and each of said distribution nodes is provided with at least one distribution opening; wherein said distribution branch pipe extends downwards and tiltedly relative to said vertical direction from said distribution opening, thereby supplying the fresh adsorption and/or absorption agent to said purification module.

5. The device for purifying exhaust gas from a combustion process of claim 4, characterized in that, said distribution node is arranged inside said funnel shape in said intermediate plate, and said distribution branch pipe extends from said distribution node to go through the corresponding intermediate plate, thereby supplying the fresh adsorption and/or absorption agent to the adjacent purification module located below said intermediate plate; and the parts of both said material supplying main pipe and said material discharging pipeline section corresponding to the funnel shape in said intermediate plate are formed as bending.

6. The device for purifying exhaust gas from a combustion process of any of claims 3 to 5, characterized in that, inside all the purification modules other than the top purification module and the bottom purification module, said material supplying main pipe is arranged to extend parallel with adjacent material discharging pipeline section.

7. The device for purifying exhaust gas from a combustion process of claim 1, characterized in that, said adsorption and/or absorption agent conveying pipeline system is arranged such that: said supplying pipeline comprises: at least one material supplying main pipe arranged to extend, along the vertical direction, substantially linearly through all the purification modules other than the bottom purification module; and a distribution branch pipe arranged to be cross-connected to said material supplying main pipe, thereby supplying the fresh adsorption and/or absorption agent to at least one of said purification module; and said discharging pipeline comprises: a plurality of material discharging pipeline sections, each of said material discharging pipeline sections is arranged to extend downwards substantially linearly, from the opening at the bottom of one of said intermediate plates, along the vertical direction, through one purification module, and terminate adjacent to the opening of another intermediate plate, thereby discharging the adsorption and/or absorption agent at least partially adsorbing said exhaust gas into the opening of another intermediate plate.

8. The device for purifying exhaust gas from a combustion process of claim 7, characterized in that, said supplying pipeline further includes: at least one distribution node in the form of a swell portion in said material supplying main pipe, and each of said distribution nodes is provided with at least one distribution opening; wherein said distribution branch pipe extends downwards and tiltedly relative to said vertical direction from said distribution opening, thereby supplying the fresh adsorption and/or absorption agent to said purification module.

9. The device for purifying exhaust gas from a combustion process of claim 8, characterized in that, said distribution node is arranged above one of said intermediate plates, and said distribution branch pipe extends from said distribution node to go through the corresponding intermediate plate, thereby supplying the fresh adsorption

22 and/or absorption agent to the adjacent purification module located below said intermediate plate.

10. The device for purifying exhaust gas from a combustion process of any of claims 7 to 9, characterized in that, inside all the purification modules other than the top purification module and the bottom purification module, said material supplying main pipe is arranged to extend parallel with adjacent material discharging pipeline section.

11. A method for purifying exhaust gas form a combustion engine, characterized by providing a device accoding to one of the claims 1 to 10 and guiding exhaust gas to be purified to enter the lower part of each purification module (110, 120, 130), and discharging purified exhaust gas from the upper part of each purification module (110, 120, 130).

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