CN215609957U - Vortex grid dust removal defogging device and absorption tower - Google Patents
Vortex grid dust removal defogging device and absorption tower Download PDFInfo
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- CN215609957U CN215609957U CN202122078055.2U CN202122078055U CN215609957U CN 215609957 U CN215609957 U CN 215609957U CN 202122078055 U CN202122078055 U CN 202122078055U CN 215609957 U CN215609957 U CN 215609957U
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Abstract
The utility model relates to a vortex grating dust and mist removing device and an absorption tower, and relates to the field of dust and mist removing devices. The vortex rotation device accelerates convergence and centrifugal dust removal, the vortex grating is opposite to the spiral direction of vortex airflow, the collision probability of dust-containing smoke and the vortex grating is greatly increased, and deep purification of the smoke is realized. The washing water ensures long-term operation of the equipment.
Description
Technical Field
The utility model relates to a dedusting and demisting device, in particular to a vortex grating dedusting and demisting device and an absorption tower, which can be particularly used for deep purification of tail gas of a decarburization absorption tower in a process of removing carbon dioxide from alcohol amine.
Background
With the global importance of the greenhouse effect problem being improved, the market popularity of the carbon emission reduction technology in China is also increasing day by day, and new power is also injected into the green development of China. To achieve the carbon reduction goal, china is required to take new actions. In order to realize the strategy of 'carbon neutralization', the energy, industry, consumption and regional structure of China will be adjusted significantly in the future 40 years. Under the condition of enhancing carbon reduction environmental protection, the carbon emission key industry in the traditional industry carries out technology upgrading and emission reduction control, and is a feasible choice at the present stage. The carbon emission reduction control technology is developed and popularized in the high-quality productivity in the industries of thermal power, steel, chemical industry, building materials, non-ferrous, paper making and the like, and can be used as the key point of the recent carbon emission reduction technology research and development. Before the non-fossil energy system is completely built, CO2The capture and sequestration technology (CCS) has the potential to reduce cost and increase flexibility in achieving greenhouse gas emission reduction.
Flue gas CO after numerous combustions2Among the trapping technologies, the carbon trapping process using alcohol amine as an absorbent is the most mature and industrially most applied technology at present. In a typical carbon capture process by an amine liquid chemical absorption method, flue gas pretreated by dust removal, desulfurization, primary cooling and the like enters an absorption tower and is sprayed from the top of the tower with an absorbent lean in CO2The solution (lean solution for short) is subjected to reverse contact reaction, wherein the decarbonized flue gas is discharged from the upper part of the absorption tower.
CO2The chemical absorption technology is the CO with the most industrial application potential at present due to high capture efficiency, relatively mature technology and good adaptability2A trapping technique. However, the device is not suitable for use in a kitchenIn contrast, chemical absorption systems capture CO from flue gas using amine-based absorbents2Meanwhile, the amine-based absorbent and degradation products thereof are discharged into the atmosphere along with the flue gas in the form of gas and aerosol, which brings the problem of secondary environmental pollution. The aerosol being flue gas CO2The main emission form of pollutants such as organic amine in the chemical absorption system. In addition, the existence of different types of condensation nuclei such as smoke dust and sulfuric acid aerosol in the inlet flue gas can cause the emission of 2-methyl-6-ethyl aniline in aerosol form to be remarkably increased, wherein SO in the flue gas3High-concentration sulfuric acid aerosol can be generated when meeting water vapor.
Aiming at the research of the post-treatment equipment of the current most promising alcohol amine decarburization technology, the research on the escape of amine, absorbent, degradation product, organic aerosol and particulate matter is beneficial to promoting the technology to stably move in the Chinese 'carbon emission reduction' tide.
Among the current dust removal defogging equipment, the contact of flue gas and sparge water is not abundant, and dust removal defogging is inefficient, has the insufficient problem of dust removal defogging, is difficult to realize the deep purification of flue gas, and some absorption towers need set up the standard that multistage dust removal defogging equipment could reach pollution-free emission, and equipment construction cost is high, multistage equipment maintenance difficulty.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem of how to realize efficient dedusting and demisting of flue gas.
The technical scheme for solving the technical problems is as follows: the utility model provides a vortex grid dust removal defogging device, includes the casing, washes water pipe, vortex grid and vortex and rises to revolve the device, the casing is the cylindric, the one end of casing has the flue gas entry, and the other end has the exhanst gas outlet, wash the water pipe and fix and set up in the casing and follow the flue gas entry extremely the direction setting of exhanst gas outlet, the vortex grid is in wind in the casing wash water pipe spiral set up, and have a plurality of slits along radial extension, the vortex is played and is revolved the device and be fixed in the flue gas entry and be used for producing the vortex air current, the spiral direction of vortex air current with the spiral opposite direction of vortex grid.
The utility model has the beneficial effects that: 1. the vortex swirling device accelerates centrifugal dust removal. The smoke containing the particles and the aerosol is subjected to vortex acceleration to form vortex airflow, fine particles, the aerosol and liquid drops are subjected to violent acceleration collision in the centrifugal acceleration process, small liquid drops are favorably converged into large liquid drops, and the particles and the aerosol break through the surface tension of the liquid drops and are then captured by the liquid drops. After the centrifugal acceleration, the dust-containing flue gas will make the adherent spiral rising movement. In the process, larger gathered larger dust-containing liquid drops are directly captured by the inner wall of the shell.
2. The vortex grating intercepts tangentially. The spiral direction of the vortex grating is opposite to that of the vortex airflow, and the design greatly increases the collision probability of the dust-containing smoke and the vortex grating. The smoke containing the particulate matters collides with the vortex grating repeatedly for many times in the spiral lifting process, and pollutants such as fine liquid drops and aerosol can be gathered and intercepted repeatedly in the process. The liquid drops are gathered in the slits of the vortex grating, along with more and more liquid drops, the liquid film in the vortex grating is thicker and thicker, and the liquid drops can gather together at the joint of the vortex grating and the inside of the shell under the combined action of gravity and cyclone centrifugal force, and finally fall and are discharged along the shell. Simple structure, dust removal defogging are efficient, realize the deep purification of flue gas.
3. The internal flushing is stably operated. The wash pipe is used for spraying the sparge water to the vortex grid, and inside sparge water design is used for carrying out the washing at no dead angle to the vortex grid, prevents the scale deposit. The scattered washing water can also wash the vortex swirling device. The intermittent and sufficient flushing can ensure the long-term stable operation of the equipment.
On the basis of the technical scheme, the utility model can be further improved as follows.
Further, the vortex grille comprises a plurality of grille rods spirally arranged around the flushing water pipe, wherein one end of each grille rod is fixedly connected with the flushing water pipe or the inner wall of the shell, and a slit is formed between every two adjacent grille rods.
The beneficial effect of adopting the further scheme is that: the width of adjustable slit in the installation to if the grating pole takes place to damage, can replace the grating pole that has damaged alone, need not whole change vortex grating, the maintenance cost is low.
Further, the washing water pipe is including washing female pipe and washing nozzle, it is a plurality of, a plurality of to wash the nozzle be fixed in wash female pipe's lateral wall and with wash female pipe's inside intercommunication, and follow wash female pipe's axis evenly distributed.
The beneficial effect of adopting the further scheme is that: the washing water enters the washing main pipe and is sprayed out from the washing nozzle, and the washing water is uniformly sprayed on the vortex grating, so that scaling is prevented, and long-term operation of the vortex grating is guaranteed.
Further, a plurality of the washing nozzles are spirally distributed along the washing main pipe.
The beneficial effect of adopting the further scheme is that: evenly arrange, the sparge water can spray evenly in circumferencial direction and axis direction homoenergetic.
Furthermore, the flushing water pipe also comprises a flushing water joint fixed at one end of the flushing main pipe.
The beneficial effect of adopting the further scheme is that: is convenient to be connected with a water pipe through a flushing water joint.
Furthermore, the number of the vortex grids is at least two, and the vortex grids are uniformly distributed in the circumferential direction of the flushing water pipe.
The beneficial effect of adopting the further scheme is that: the contact area of vortex grid and flue gas is big, and the dust removal defogging is efficient.
Further, the number of the vortex grids is three.
Further, the housing is cylindrical, and the washing water pipe is arranged along the axis of the housing.
The beneficial effect of adopting the further scheme is that: when a plurality of vortex grid dust removal defogging device were used to the absorption tower, a plurality of mutual settings of hugging closely, space utilization is high.
Further, the vortex swirling device is a swirler or a swirling impeller.
The beneficial effect of adopting the further scheme is that: the spiral-start device or the spiral-start impeller can generate vortex airflow, the structure of the spiral-start impeller is simpler, and the equipment cost is low.
The utility model also provides an absorption tower which comprises the vortex grating dedusting and demisting device.
The beneficial effect who adopts above-mentioned scheme is: the dust removal defogging is efficient, can realize the deep purification of flue gas.
Drawings
FIG. 1 is a schematic structural view of a vortex grille dedusting and demisting device of the present invention;
FIG. 2 is a three-dimensional perspective view of the scroll grille dust and mist removal apparatus of the present invention;
FIG. 3 is a schematic view of the arrangement of the vortex grille dedusting and demisting device in the absorption tower from the top.
In the drawings, the components represented by the respective reference numerals are listed below:
1. the device comprises a shell, 2, a washing water pipe, 3, a flue gas inlet, 4, a flue gas outlet, 5, a vortex grating, 6, a spiral impeller, 7, a washing main pipe, 8, a washing nozzle, 9, a washing water joint, 10 and a grating rod.
Detailed Description
The principles and features of this invention are described below in conjunction with examples which are set forth to illustrate, but are not to be construed to limit the scope of the utility model.
As shown in fig. 1 and 2, the present invention provides a vortex grating dust removal and mist removal device, which includes a casing 1, a washing water pipe 2, a vortex grating 5 and a vortex swirling device, wherein the casing 1 is cylindrical, one end of the casing 1 has a flue gas inlet 3, the other end of the casing 1 has a flue gas outlet 4, the washing water pipe 2 is fixedly disposed in the casing 1 and is disposed along a direction from the flue gas inlet 3 to the flue gas outlet 4, the vortex grating 5 is spirally disposed around the washing water pipe 2 in the casing 1 and has a plurality of slits extending in a radial direction, the vortex swirling device is fixed in the flue gas inlet 3 and is configured to generate a vortex air flow, and a spiral direction of the vortex air flow is opposite to a spiral direction of the vortex grating 5.
Vortex grid dust removal defogging device's beneficial effect is: 1. the vortex swirling device accelerates centrifugal dust removal. The smoke containing the particles and the aerosol is subjected to vortex acceleration to form vortex airflow, fine particles, the aerosol and liquid drops are subjected to violent acceleration collision in the centrifugal acceleration process, small liquid drops are favorably converged into large liquid drops, and the particles and the aerosol break through the surface tension of the liquid drops and are then captured by the liquid drops. After the centrifugal acceleration, the dust-containing flue gas will make the adherent spiral rising movement. In the process, larger gathered larger dust-containing liquid drops are directly captured by the inner wall of the shell.
2. The vortex grating 5 intercepts tangentially. The spiral direction of the vortex grating 5 is opposite to the spiral direction of the vortex airflow, and the design greatly increases the collision probability of the dust-containing smoke and the vortex grating 5. The smoke containing the particulate matters collides with the vortex grating 5 repeatedly for many times in the spiral rising process, and pollutants such as fine liquid drops and aerosol can be gathered and intercepted repeatedly in the process. The liquid drops are gathered in the slits of the vortex grating 5, the liquid film in the vortex grating 5 is thicker and thicker along with the liquid drops, and the liquid drops are gathered at the joint of the vortex grating 5 and the inner part of the shell 1 under the combined action of gravity and cyclone centrifugal force and finally fall and are discharged along the shell 1. Simple structure, dust removal defogging are efficient, realize the deep purification of flue gas.
3. The internal flushing is stably operated. The flushing water pipe 2 is used for spraying flushing water to the vortex grating 5, and the internal flushing water is designed to flush the vortex grating 5 without dead angles, so that scaling is prevented. The scattered washing water can also wash the vortex swirling device. The intermittent and sufficient flushing can ensure the long-term stable operation.
However, the present embodiment does not limit the sectional shape of the cylindrical housing 1 and the placement manner in the use state. The sectional shape of the housing 1 may be polygonal, such as triangular, rectangular, etc., or the sectional shape may be circular, and it is preferable to use a housing 1 whose sectional shape is circular, that is, the housing 1 is preferably cylindrical. The shell 1 can be vertically arranged when in use, the technical effect of the utility model can be realized when the flue gas inlet 3 faces upwards or downwards, and the shell 1 can also be obliquely or horizontally arranged. Because the motion state of flue gas in natural state and in the absorption tower is from bottom to top motion, preferentially, casing 1 is vertical to be set up, and flue gas inlet 3 is down, and exhanst gas outlet 4 sets up, need not to increase other fan that promote the gas flow.
Wherein, wash water pipe 2 through the fixed setting of water pipe support in casing 1, the water pipe support respectively with wash water pipe 2 with casing 1 fixed connection, perhaps the water pipe support respectively with wash water pipe 2 and absorption tower lateral wall fixed connection.
On the basis of the scheme, the vortex grating 5 comprises a plurality of grating rods 10 spirally arranged around the flushing water pipe 2, one end of each grating rod 10 is fixedly connected with the flushing water pipe 2 or the inner wall of the shell 1, and the slits are formed between every two adjacent grating rods 10.
The width of the slit can be adjusted in the installation process, and if the grille rod 10 is damaged, the damaged grille rod 10 can be replaced independently, the scroll grille 5 does not need to be replaced integrally, and the maintenance cost is low.
In one particular embodiment, all of the ends of the grill rods 10 remote from the flush water tube 2 are fixed to the housing 1.
On the basis of any one of the above schemes, the flushing water pipe 2 comprises a flushing main pipe 7 and a flushing nozzle 8, the flushing nozzle 8 is multiple, and the flushing nozzle 8 is fixed on the side wall of the flushing main pipe 7 and communicated with the inside of the flushing main pipe 7 and uniformly distributed along the axis of the flushing main pipe 7.
On the basis of any one of the above schemes, a plurality of the washing nozzles 8 are spirally distributed along the washing main pipe 7.
Evenly arrange, the sparge water can spray evenly in circumferencial direction and axis direction homoenergetic.
On the basis of any scheme, the flushing water pipe 2 further comprises a flushing water joint 9 fixed at one end of the flushing main pipe 7.
The flushing water joint 9 is used for connecting with a flushing water inlet pipe.
Preferably, the rinsing water connection 9 is located outside the housing 1.
On the basis of any scheme, the number of the vortex grids 5 is at least two, and at least two vortex grids 5 are uniformly distributed in the circumferential direction of the flushing water pipe 2.
The contact area of vortex grid and flue gas is big, and the dust removal defogging is efficient.
Preferably, the number of the vortex grating 5 is three. In a cross section perpendicular to the main flush pipe 7, two adjacent swirl grids 5 are spaced apart by 120 °.
On the basis of any one of the above schemes, the shell 1 is cylindrical, and the flushing water pipe 2 is arranged along the axis of the shell 1.
On the basis of any scheme, the vortex swirling device is a swirler or a swirling impeller 6.
The spiral-start device or the spiral-start impeller can generate vortex airflow, the structure of the spiral-start impeller is simpler, and the equipment cost is low.
In one specific embodiment, the housing 1 of the vortex grille dedusting and demisting device is in a circular tube shape, the lower end of the housing is provided with a flue gas inlet 3, and the upper end of the housing is provided with a flue gas outlet 4. The rotating impeller 6 is horizontally fixed inside the shell 1, the lower edge of the rotating impeller is flush with the lower edge of the shell 1, and the periphery of the rotating impeller is welded and fixed with the inner wall of the shell 1. Each vortex grating 5 is composed of a group of grating rods 10 with equal length, and each grating rod 10 is perpendicular to the inner wall of the shell 1. Each group of grid rods 10 are spirally and uniformly distributed on the spiral line of the inner wall of the shell 1, the number of the vortex grids 5 is three, and three groups of grid rods 10 on the same cross section are 120 degrees apart to jointly form the vortex grids 5. The washing nozzles 8 are installed on the washing main pipe 7 and are spirally and uniformly arranged along the axis of the washing main pipe 7, and the washing water can uniformly cover the whole vortex grating 5. A washing water joint 9 is arranged below the washing main pipe 7 to connect washing water to supply water.
The utility model also provides an absorption tower which comprises the vortex grating dedusting and demisting device.
The dust removal defogging is efficient, can realize the deep purification of flue gas. As shown in fig. 3, the vortex grille dedusting and demisting device is arranged in the tower body of the absorption tower and is positioned above the packing layer, and the plurality of vortex grille dedusting and demisting devices are closely arranged to form a vortex grille dedusting and demisting layer. The vortex grating dedusting and demisting device is suitable for any gas absorption tower, especially for alcohol amine carbon dioxide removal absorption towers, and can realize deep purification.
In one specific embodiment, the absorption tower is provided with a vortex grating dedusting and demisting device which is arranged above a packing layer of an alcohol amine carbon dioxide removal absorption tower, and a vortex grating dedusting and demisting layer is formed by a plurality of vortex grating dedusting and demisting devices with the shell 1 diameter of 500mm (in other embodiments, other sizes can be selected). The decarbonized smoke entrains escaped alcohol amine liquid drops and aerosol together to enter the shell 1 from bottom to top. The mixed flue gas is accelerated and centrifugally moved clockwise when passing through the rotating impeller 6, particles and liquid drops are violently collided in the process, small liquid drops are polymerized into large liquid drops, and the particles and aerosol break through the surface tension of a liquid film and enter the liquid drops. The mixed gas moving along the inner wall of the shell 1 collides with the three sets of vortex grids 5 which are rotationally arranged anticlockwise in the ascending process, and large liquid drops and liquid drops containing particles are intercepted by the grid rods 10 and converged in the gap between the two adjacent grid rods 10 in the collision process. Along with more and more liquid drops, the liquid film in the vortex grating 5 is thicker and thicker, and gathers together towards the joint of the grating rod 10 and the shell 1 under the combined action of gravity and cyclone centrifugal force, and finally flows back to the absorption tower along the inner wall of the shell 1. The flushing water pipe 2 is arranged in the center of the shell 1, penetrates through the whole shell 1 and is fixed on the spinning impeller 6. Incoming water through the flushing water connection 9 is sprayed onto the swirl grate 5 at a large angle by the uniformly arranged flushing nozzles 8. The design of inside washing can prevent particulate matter accumulation, the scale deposit that grid pole 10 clearance appears, guarantees the long-term steady operation of equipment.
Vortex airflow in the direction opposite to the spiral direction of the vortex grating 5 is generated through the vortex impeller 6, and pollutants in the flue gas are subjected to three processes of accelerated convergence, centrifugal removal and collision interception in the operation process. Meanwhile, the vortex grating which is spirally arranged can also play a role in intercepting vortex airflow for many times. Through the washing mode that the inside no dead angle of wash pipe 2, can guarantee the high utilization ratio of equipment.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The utility model provides a vortex grid dust removal defogging device, its characterized in that includes casing (1), washes water pipe (2), vortex grid (5) and vortex and rises to revolve the device, casing (1) is the cylindric, the one end of casing (1) has flue gas inlet (3), and the other end has exhanst gas outlet (4), wash water pipe (2) fixed the setting and be in casing (1) and follow flue gas inlet (3) extremely the direction setting of exhanst gas outlet (4), vortex grid (5) are in wind in casing (1) wash water pipe (2) spiral setting, and have a plurality of slits along radial extension, vortex is played to revolve the device and is fixed in flue gas inlet (3) and be used for producing the vortex air current, the spiral direction of vortex air current with the spiral opposite direction of vortex grid (5).
2. A scroll grille dedusting and demisting device according to claim 1, wherein the scroll grille (5) comprises a plurality of grille rods (10) spirally arranged around the flushing water pipe (2), one end of each grille rod (10) is fixedly connected with the flushing water pipe (2) or the inner wall of the housing (1), and the slits are formed between two adjacent grille rods (10).
3. A scroll grille dedusting and demisting device according to claim 1, wherein the flushing water pipe (2) comprises a flushing main pipe (7) and a plurality of flushing nozzles (8), the plurality of flushing nozzles (8) are fixed on the side wall of the flushing main pipe (7) and communicated with the inside of the flushing main pipe (7), and are uniformly distributed along the axis of the flushing main pipe (7).
4. A scroll grid dedusting and demisting device according to claim 3, wherein a plurality of said rinse nozzles (8) are helically distributed along said rinse header (7).
5. A scroll grille dedusting and demisting device as claimed in claim 3 wherein the flush pipe (2) further comprises a flush water connection (9) fixed to one end of the main flush pipe (7).
6. A vortex grating dedusting and demisting device according to any of the claims 1-5, characterized in that the number of the vortex gratings (5) is at least two, and at least two vortex gratings (5) are evenly distributed in the circumferential direction of the flushing water pipe (2).
7. A scroll grille dedusting and demisting device according to claim 6, wherein the number of the scroll grille (5) is three.
8. A scroll grille dedusting and demisting device according to any of claims 1-5, wherein the housing (1) is cylindrical and the flush tube (2) is disposed along the axis of the housing (1).
9. A scroll grid dedusting and demisting device according to any of claims 1-5, wherein the scroll-type swirling device is a swirler or a swirling impeller (6).
10. An absorption tower comprising the vortex grating dedusting and demisting apparatus of any of claims 1-9.
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| CN113546475A (en) * | 2021-08-31 | 2021-10-26 | 北京清新环境技术股份有限公司 | Vortex grid dust removal defogging device and absorption tower |
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Effective date of registration: 20221129 Address after: 518023 1103, Tower 2, Luohu Investment Holding Building, No. 112, Qingshuihe 1st Road, Qingshuihe Community, Luohu District, Shenzhen, Guangdong Patentee after: Shenzhen Qingxin Environmental Technology Co.,Ltd. Address before: Floor 11, CPPCC News Building, 69 xibalizhuang Road, Haidian District, Beijing 100142 Patentee before: BEIJING SPC ENVIRONMENT PROTECTION TECH Co.,Ltd. |