CN215506306U - Flue gas treatment device - Google Patents
Flue gas treatment device Download PDFInfo
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- CN215506306U CN215506306U CN202120516781.5U CN202120516781U CN215506306U CN 215506306 U CN215506306 U CN 215506306U CN 202120516781 U CN202120516781 U CN 202120516781U CN 215506306 U CN215506306 U CN 215506306U
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- flue gas
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Abstract
The utility model relates to a flue gas treatment device, comprising: the cylinder comprises a flue gas outlet arranged on the upper end part of the cylinder and a flue gas inlet arranged on the lower end part of the cylinder; the flow guide core pipe penetrates into the cylinder body and can release the received purifying liquid into the cylinder body; the purification impeller is arranged in the cylinder body and positioned below the flow guide core pipe, and can guide the flue gas to rotate and promote the rotating flue gas to be mixed with the falling purification liquid; and the demisting component is arranged in the cylinder and positioned above the purification impeller and can demist the flue gas flowing through the demisting component. The flue gas treatment device has the advantages of simple structure, simple process, small occupied area, difficulty in blockage and higher working efficiency, and can reduce the construction, operation and transformation costs and improve the use flexibility and the working efficiency.
Description
Technical Field
The utility model belongs to the technical field of flue gas treatment equipment, and particularly relates to a flue gas treatment device.
Background
The flue gas treatment device effectively removes harmful substances in the flue gas to below a specified concentration, and avoids the adverse phenomena of corrosion or blockage of production equipment and the like when the equipment is applied. At present, in a flue gas treatment device, the reaction principle is basically the same, and a purifying liquid (such as alkali) is used for reacting with harmful substances (such as sulfur and pins) in flue gas and removing the harmful substances, but the realization mode of gas-liquid mixing affects the reaction efficiency, resistance and reliability of the system differently.
At present, most of flue gas treatment devices (such as wet desulfurization towers) are provided with two to three layers of nozzles in an absorption tower, and the high-coverage rate spraying is carried out on the cross section of the whole absorption tower to realize gas-liquid mixing, so that the requirement of removing harmful substances is realized, the structure is complex, the process is complex, the occupied area is large, the construction and modification engineering quantity is large, the construction and operation cost is high, and the use is inconvenient and the flexibility is poor for occasions with less flue gas quantity, such as coking plants, nonferrous metals, small boilers and the like, due to the complex structure and the large occupied area.
SUMMERY OF THE UTILITY MODEL
In order to solve all or part of the problems, the utility model aims to provide the flue gas treatment device which is simple in structure, simple in process, small in occupied area, not easy to block and high in working efficiency, so that the construction, operation and transformation costs are reduced, and the use flexibility and the working efficiency are improved.
The utility model provides a flue gas treatment device, which comprises: the cylinder comprises a flue gas outlet arranged on the upper end part of the cylinder and a flue gas inlet arranged on the lower end part of the cylinder; the flow guide core pipe penetrates into the cylinder body and can release the received purifying liquid into the cylinder body; the purification impeller is fixedly arranged in the cylinder body and positioned below the flow guide core pipe, and can guide the smoke to rotate and promote the rotating smoke to be mixed with the falling purification liquid; and the demisting component is arranged in the cylinder and positioned above the purification impeller and can demist the smoke flowing through the demisting component.
Further, the flue gas treatment device comprises an auxiliary impeller fixedly arranged in the cylinder and positioned below the purification impeller, the auxiliary impeller can enable the flue gas to rotate and promote the rotating flue gas to be mixed with the scattered purification liquid, and the rotating direction of the flue gas after passing through the auxiliary impeller is opposite to the rotating direction of the flue gas after passing through the purification impeller.
Further, the auxiliary impeller is an inverted conical impeller, and the large-diameter end of the conical impeller is connected or contacted with the cylinder.
Further, the defogging assembly comprises a first defogging impeller fixedly arranged in the barrel.
Furthermore, the defogging assembly also comprises a second defogging impeller which is fixedly arranged in the barrel and is positioned below the first defogging impeller.
Furthermore, the defogging assembly further comprises a third defogging impeller which is fixedly arranged in the cylinder and is positioned below the second defogging impeller, wherein the outer diameter of the first defogging impeller is larger than or equal to that of the second defogging impeller, and the outer diameter of the second defogging impeller is larger than that of the third defogging impeller.
Further, the flue gas treatment device also comprises a flue gas accelerating ring which is fixed on the inner wall of the cylinder body and the cross section area of which gradually decreases along the direction from bottom to top, and the flue gas accelerating ring is arranged below the first demisting impeller and is adjacent to the first demisting impeller.
Furthermore, the flue gas treatment device also comprises a guide sleeve arranged outside the guide core pipe in a sleeved mode, a fixed support connected with the guide sleeve and the cylinder body, and a first nozzle, a second nozzle and a third nozzle which are arranged on the guide sleeve and can sequentially spray cleaning liquid flowing between the guide sleeve and the guide core pipe to the first demisting impeller, the second demisting impeller and the third demisting impeller.
Furthermore, the first demisting impeller, the second demisting impeller and the third demisting impeller are all fixed on the flow guide sleeve.
Further, the flue gas treatment device of the flue gas treatment device is a flue gas denitration tower, a flue gas desulfurization tower or a flue gas desulfurization denitration tower comprising a tower body, the cylinder body, the guide core pipe, the purification impeller and the defogging assembly are arranged in the tower body, and the purification liquid comprises a desulfurizer and/or a denitration agent.
According to the technical scheme, the flue gas treatment device mainly comprises a cylinder, a flow guide core pipe, a purification impeller and a demisting assembly, wherein in the using process, flue gas enters from a flue gas inlet at the bottom of the cylinder and flows out from a flue gas outlet at the top of the cylinder, purification liquid is introduced into the cylinder through the flow guide core pipe and falls towards the purification impeller, when the flue gas passes through the purification impeller, the purification impeller can guide the flue gas to rotate and promote the rotating flue gas to be mixed with the falling purification liquid, so that harmful substances in the flue gas are removed by the purification liquid mixed in the flue gas, and the flue gas with the harmful substances removed is demisted by the demisting assembly before leaving the cylinder, so that the moisture content and the dust content of the flue gas are reduced, and the final purification effect of the flue gas is improved. Compared with the traditional flue gas treatment device (such as a wet desulfurization tower), the flue gas treatment device simplifies the process flow and the structure, reduces the floor area of the equipment, greatly reduces the construction, operation and modification costs of the equipment, and improves the flexibility of the equipment. In addition, the flue gas treatment device provided by the utility model has the advantages of difficulty in blockage and higher working efficiency.
Drawings
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the figure:
FIG. 1 is a schematic structural diagram of a flue gas treatment device according to an embodiment of the present invention;
FIG. 2 schematically illustrates an auxiliary impeller of a flue gas treatment device according to an embodiment of the utility model;
FIG. 3 schematically shows a cleaning impeller of a flue gas treatment device according to an embodiment of the utility model;
FIG. 4 schematically illustrates a second demister impeller for a flue gas treatment device according to an embodiment of the utility model;
FIG. 5 is a cross-sectional view of a flue gas treatment device according to another embodiment of the present invention.
In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale
Detailed Description
The utility model will be further explained with reference to the drawings.
Fig. 1 is a schematic structural diagram of a flue gas treatment device according to an embodiment of the present invention. As shown in fig. 1, the flue gas treatment device 100 is a flue gas denitration tower, a flue gas desulfurization tower, or a flue gas desulfurization and denitration tower, and the purification solution includes a desulfurizing agent (Na2CO3, NaOH or ca (oh)2, etc.) and/or a denitrating agent. The flue gas treatment device 100 is suitable for being applied to flue gas discharge places of small and medium boilers, steel making, aluminum smelting, ships and other chemical and non-electrical factories.
The flue gas treatment device 100 comprises a cylinder 1, a guide core pipe 4, a purification impeller 7 and a demisting assembly (for example, a first demisting impeller 6, a second demisting impeller 5 and/or a third demisting impeller 2). The cylinder 1 comprises a flue gas outlet 1a arranged on its upper end and a flue gas inlet 1b arranged on its lower end. The guide core pipe 4 penetrates into the cylinder body 1 and can release the received purifying liquid into the cylinder body 1. The purification impeller 7 is fixedly arranged in the cylinder 1 and positioned below the guide core pipe 4, and can guide the flue gas to rotate and promote the rotating flue gas to be mixed with the falling purification liquid. The cleaning impeller 7 can be fixed on the inner wall of the cylinder 1 through a bracket structure 71 (see fig. 3 for details), in addition to being directly fixed on the inner wall of the cylinder 1. The demisting component is arranged in the cylinder body 1 and positioned above the purification impeller 7, and can demist the flue gas flowing through the demisting component. In one embodiment, the flue gas treatment device 100 is a flue gas denitration tower, a flue gas desulfurization tower or a flue gas desulfurization and denitration tower, and the cylinder 1 directly serves as a tower body of the flue gas denitration tower, the flue gas desulfurization tower or the flue gas desulfurization and denitration tower. In another embodiment, the flue gas treatment device 100 is also a flue gas denitration tower, a flue gas desulfurization tower or a flue gas desulfurization and denitration tower, and the module 101 mainly composed of the cylinder 1, the guide core tube 4, the purification impeller 7 and the defogging component is directly installed in the tower body 102 of the flue gas denitration tower, the flue gas desulfurization tower or the flue gas desulfurization and denitration tower (see fig. 5 in detail).
According to the flue gas treatment device 100 of the embodiment of the utility model, in the use process, flue gas enters through the flue gas inlet 1b at the bottom of the cylinder 1 and flows out from the flue gas outlet 1a at the top of the cylinder, the purifying liquid is introduced into the cylinder 1 through the guide core pipe 4 and falls towards the purifying impeller 7, when the flue gas passes through the purifying impeller 7, the purifying impeller 7 can guide the flue gas to rotate and promote the rotating flue gas to be mixed with the falling purifying liquid, so that harmful substances in the flue gas are removed by the purifying liquid mixed in the flue gas, and the flue gas with the harmful substances removed is demisted by the demisting component before leaving the cylinder 1, so that the moisture content and the dust content of the flue gas are reduced, which is beneficial to improving the final purifying effect of the flue gas. The flue gas treatment device 100 guides the flue gas to rotate through the purification impeller 7 and blows off the falling purification liquid through the rotating flue gas, so that the purification liquid and the flue gas are efficiently mixed at this time, and compared with the traditional flue gas treatment device (such as a wet desulfurization tower), the flue gas treatment device 100 simplifies the process flow and the structure, reduces the occupied area of equipment, greatly reduces the construction, operation and transformation cost of the equipment, and improves the flexibility of the equipment. In addition, the flue gas treatment device 100 of the present invention has the advantages of being not easy to block and having high working efficiency.
The flue gas treatment device 100 further comprises an auxiliary impeller 8 fixedly arranged in the cylinder 1 and located below the cleaning impeller 7, as shown in detail in fig. 1 and 2. The auxiliary impeller 8 is also capable of causing the flue gas to rotate and causing the rotating flue gas to mix with the scattered cleaning liquid, wherein the direction of rotation of the flue gas after passing through the auxiliary impeller 8 is opposite to the direction of rotation of the flue gas after passing through the cleaning impeller 7. After the flue gas passes through the auxiliary impeller 8 and the purifying impeller 7, the flue gas can not only rotate but also be forced to change direction, which helps the purifying liquid to be blown by the flue gas to be more dispersed, and improves the mixing effect of the purifying liquid and the flue gas, thereby further improving the purifying effect of the flue gas processing device 100. The auxiliary impeller 8 and the purifying impeller 7 should be selected to be impellers with different blade inclination angles, especially with an angle difference close to 90 °, so as to ensure that the rotation direction of the auxiliary impeller 8 is opposite to the rotation direction of the auxiliary impeller after passing through the purifying impeller 7.
In this embodiment, the auxiliary impeller 8 is an inverted conical impeller, and the large-diameter end of the conical impeller is connected with the cylinder 1. Although the auxiliary impeller 8 can also be an impeller with a conventional structure, a large number of experiments prove that the conical impeller has a better improvement degree on the mixing efficiency of the flue gas and the purifying liquid than the conventional impeller, and is helpful for further improving the purifying effect of the flue gas treatment device 100.
In this embodiment, the mist eliminator assembly comprises a first mist eliminator impeller 6 fixedly disposed within the barrel 1. When the flue gas carrying liquid droplets passes through the first demister impeller 6, it can intercept the liquid droplets (the main component is used purification liquid) in the flue gas to achieve a demisting effect. Preferably, the demister assembly may further comprise a second demister impeller 5 fixedly disposed within the barrel 1 and positioned below the first demister impeller 6. When the flue gas passes through the second demisting impeller 5, liquid drops in the flue gas are removed once, and then when the flue gas passes through the first demisting impeller 6, the liquid drops in the flue gas are removed again. More preferably, the demister assembly may further comprise a third demister impeller 2 fixedly disposed in the barrel 1 and positioned below the second demister impeller 5. When the flue gas passes through the third demisting impeller 2, the second demisting impeller 5 and the first demisting impeller 6, liquid drops in the flue gas are removed for three times. It has been found through a number of experiments that when the outer diameter of the first demister impeller 6 is greater than or equal to the outer diameter of the second demister impeller 5, and the outer diameter of the second demister impeller 5 is greater than the outer diameter of the third demister impeller 2, their synergistic removal of liquid droplets from flue gas is best.
In this embodiment, the flue gas treatment device 100 further includes a flue gas accelerating ring 3 fixed on the inner wall of the cylinder 1 and having a gradually decreasing cross-sectional area along a direction from bottom to top, and the flue gas accelerating ring 3 is disposed on the first demister impeller 6 and is adjacent to the first demister impeller 6 (for example, the distance between the two is less than 1/3 times of the inner diameter of the cylinder 1). The flue gas accelerating ring 3 not only can improve the speed of the flue gas and improve the demisting effect of the first demisting impeller 6, but also can climb to the liquid film to intercept the liquid film. In order to avoid storing a large amount of liquid (used purifying liquid) between the flue gas accelerating ring 3 and the cylinder 1, a leakage hole can be arranged at the large-diameter end of the flue gas accelerating ring 3.
In the present embodiment, the first defogging impeller 6, the second defogging impeller 5, and the third defogging impeller 2 may be selected as impellers having different sizes and the same structure, or may be selected as impellers having different sizes and different structures. When the first demister impeller 6, the second demister impeller 5 and the third demister impeller 2 are selected as impellers of different sizes but identical structures, the impellers may comprise a hub 51, and inclined blades 52 provided on the hub 51 and spaced along the circumference thereof, as detailed in fig. 4.
In this embodiment, the flue gas treatment device 100 further includes a flow guide sleeve 13 sleeved outside the flow guide core tube 4, a fixing support 9 connected with the flow guide sleeve 13 and the cylinder 1, and a first nozzle 12, a second nozzle 10, and a third nozzle 11 which are arranged on the flow guide sleeve 13 and can sequentially spray the cleaning liquid flowing between the flow guide sleeve 13 and the flow guide core tube 4 onto the first defogging impeller 6, the second defogging impeller 5, and the third defogging impeller 2. In order to reduce the difficulty of fixedly arranging the defogging impeller 5 in the cylinder 1, the first nozzle 12, the second nozzle 10 and the third nozzle 11 can be fixed on the flow guide sleeve 13, so that the manufacturing cost of the smoke treatment device 100 is reduced. The spraying flow and the liquid supply pressure of the nozzle can be selected according to actual needs, for example, the spraying flow is 0.5L/min, and the liquid supply pressure is 0.35-0.45 MP.
In summary, the flue gas treatment device 100 of the embodiment of the utility model has the advantages of simple structure, simple process, small occupied area, difficulty in blocking, higher working efficiency, capability of reducing construction, operation and modification costs, and improvement of use flexibility and working efficiency.
In the description of the present application, it is to be understood that the terms "upper", "lower", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily make changes or variations within the technical scope of the present invention disclosed, and such changes or variations should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims. The technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. It is intended that the utility model not be limited to the particular embodiments disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.
Claims (10)
1. A flue gas treatment device, comprising:
the cylinder comprises a flue gas outlet arranged on the upper end part of the cylinder and a flue gas inlet arranged on the lower end part of the cylinder;
the flow guide core pipe penetrates into the cylinder body and can release the received purifying liquid into the cylinder body;
the purification impeller is fixedly arranged in the cylinder body and positioned below the flow guide core pipe, and can guide the smoke to rotate and promote the rotating smoke to be mixed with the falling purification liquid;
and the demisting component is arranged in the cylinder and positioned above the purification impeller and can demist the smoke flowing through the demisting component.
2. The flue gas treatment device according to claim 1, further comprising an auxiliary impeller fixedly disposed in the cylinder below the cleaning impeller, the auxiliary impeller being capable of rotating the flue gas and causing the rotating flue gas to mix with the scattered cleaning liquid, wherein the flue gas rotates in a direction opposite to the direction in which the flue gas rotates after passing through the auxiliary impeller.
3. The flue gas treatment device according to claim 2, wherein the auxiliary impeller is an inverted conical impeller, and a large-diameter end of the conical impeller is connected with the cylinder.
4. A flue gas treatment device according to any of claims 1 to 3, wherein the demister assembly comprises a first demister impeller fixedly arranged within the barrel.
5. The flue gas treatment device of claim 4, wherein the demister assembly further comprises a second demister impeller fixedly disposed within the barrel and positioned below the first demister impeller.
6. The flue gas treatment device of claim 5, wherein the demister assembly further comprises a third demister impeller fixedly disposed within the barrel and positioned below the second demister impeller, wherein the first demister impeller has an outer diameter greater than or equal to the outer diameter of the second demister impeller, and the second demister impeller has an outer diameter greater than the outer diameter of the third demister impeller.
7. The flue gas treatment device according to claim 4, further comprising a flue gas acceleration ring fixed to the inner wall of the cylinder and having a cross-sectional area gradually decreasing in a direction from bottom to top, the flue gas acceleration ring being disposed below the first demister impeller and adjacent to the first demister impeller.
8. The flue gas treatment device according to claim 6, further comprising a flow guide sleeve sleeved outside the flow guide core tube, a fixed support connected with the flow guide sleeve and the cylinder body, and a first nozzle, a second nozzle and a third nozzle which are arranged on the flow guide sleeve and can sequentially spray cleaning liquid flowing between the flow guide sleeve and the flow guide core tube to the first defogging impeller, the second defogging impeller and the third defogging impeller.
9. The flue gas treatment device of claim 8, wherein the first demister impeller, the second demister impeller, and the third demister impeller are all fixed to the flow guide sleeve.
10. The flue gas treatment device according to any one of claims 1 to 3, wherein the flue gas treatment device is a flue gas denitration tower, a flue gas desulfurization tower or a flue gas desulfurization and denitration tower comprising a tower body, the cylinder, the guide core pipe, the purification impeller and the defogging assembly are installed in the tower body, and the purification liquid comprises a desulfurizer and/or a denitration agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120516781.5U CN215506306U (en) | 2021-03-11 | 2021-03-11 | Flue gas treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120516781.5U CN215506306U (en) | 2021-03-11 | 2021-03-11 | Flue gas treatment device |
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| Publication Number | Publication Date |
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| CN215506306U true CN215506306U (en) | 2022-01-14 |
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| CN202120516781.5U Active CN215506306U (en) | 2021-03-11 | 2021-03-11 | Flue gas treatment device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115253649A (en) * | 2022-07-12 | 2022-11-01 | 关兔 | Flue gas denitration and desulfurization washing device and denitration and desulfurization method |
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2021
- 2021-03-11 CN CN202120516781.5U patent/CN215506306U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115253649A (en) * | 2022-07-12 | 2022-11-01 | 关兔 | Flue gas denitration and desulfurization washing device and denitration and desulfurization method |
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