Absorption tower

Abstract

The invention provides an absorption tower, which comprises: a tower body, the tower body is provided with a flue gas inlet, a discharge port and a communication cavity communicated with the flue gas inlet and the discharge port, and the discharge port is located above the flue gas inlet; the dry bed and the heat exchanger are arranged in the communicating cavity; and the electric dust remover is arranged in the communicating cavity, the electric dust remover is arranged above the dry bed and the heat exchanger, and the electric dust remover adsorbs impurities in the communicating cavity through a generated electric field. By means of the technical scheme, the technical problem that in the prior art, a large amount of water or acid or additive needs to be added to an absorption tower, and consequently the cost is high can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of absorption towers, and in particular to an absorption tower. Background Art

[0002] At present, amine escape in the absorber is an important environmental and industrial problem, because amine is a volatile organic compound (VOC), and its emission will not only lead to the loss of absorbent, increase the system operation cost, but also may cause harm to the environment and human health. Conventional methods for treating amine escape in the absorber in the prior art include the following: water washing method: by installing a water washing tower at the outlet of the absorber, the flue gas is fully contacted with water by spraying, and the volatile amine in the gas phase is absorbed. The water washing method can effectively capture the escaped amine, but multiple water washings may be required to achieve a higher capture efficiency; acid washing method: using an acidic solution instead of water for washing can improve the absorption efficiency of amines, especially for amines with higher volatility. Acid washing can reduce the concentration of amines escaping into the flue gas, but may involve additional acid consumption and processing costs; additive method: adding specific chemical substances such as alcohols, alcohol amines, inorganic salts, etc. to the absorption liquid to reduce the volatility of amines. Additives can reduce the concentration of free amines in the liquid phase by forming hydrogen bonds or complexes, thereby inhibiting the volatilization and escape of amines.

[0003] However, all of the above methods require sufficient water or acid or additives, and consume a lot of water or acid or additives, which are not easy to operate, making the process operation of the internal structure of the absorption tower more complicated and costly. Summary of the invention

[0004] The main purpose of the present invention is to provide an absorption tower to solve the technical problem that the absorption tower in the prior art often needs to add a large amount of water or acid or additives, resulting in high cost.

[0005] In order to achieve the above object, the present invention provides an absorption tower, comprising:

[0006] The tower body has a smoke inlet, an exhaust port, and a connecting cavity connected to the smoke inlet and the exhaust port, and the exhaust port is located above the smoke inlet;

[0007] The drying bed and the heat exchanger are both arranged in the communicating cavity;

[0008] The electrostatic precipitator is arranged in the connecting cavity. The electrostatic precipitator is arranged above the dry bed and the heat exchanger. The electrostatic precipitator adsorbs impurities in the connecting cavity by generating an electric field.

[0009] Furthermore, the absorption tower also includes:

[0010] A concentration detection structure is arranged in the communicating cavity, and is used to detect the concentration of smoke components in the communicating cavity;

[0011] The control component, the electrostatic precipitator and the concentration detection structure are all connected to the control component, and the control component adjusts the electric field voltage of the electrostatic precipitator according to the concentration detected by the concentration detection structure.

[0012] Further, the concentration detection structure includes:

[0013] A first concentration detection member is arranged below the electrostatic precipitator;

[0014] A second concentration detection member is arranged above the electrostatic precipitator;

[0015] Among them, the control component adjusts the electric field voltage of the electrostatic precipitator according to the concentration difference between the concentration detected by the first concentration detection component and the concentration detected by the second concentration detection component; when the concentration difference between the concentration detected by the first concentration detection component and the concentration detected by the second concentration detection component is within a preset difference range and the concentration detected by the first concentration detection component is greater than the concentration detected by the second concentration detection component, the control component controls the electric field voltage of the electrostatic precipitator to remain unchanged or to decrease; when the concentration difference between the concentration detected by the first concentration detection component and the concentration detected by the second concentration detection component exceeds the preset difference range or the concentration detected by the first concentration detection component is less than the concentration detected by the second concentration detection component, the control component controls the electric field voltage of the electrostatic precipitator to increase.

[0016] Further, the electrostatic precipitator has an inlet end and an outlet end, and the outlet end is located on a side of the inlet end close to the discharge port;

[0017] Wherein, the first concentration detection element is arranged at the inlet end; and / or,

[0018] The second concentration detecting member is disposed at the outlet end.

[0019] Furthermore, the periphery of the electrostatic precipitator is matched with the periphery of the inner wall of the connecting cavity, the periphery of the electrostatic precipitator is installed on the inner wall of the connecting cavity, and a plurality of vents are arranged at intervals on the electrostatic precipitator.

[0020] Furthermore, the electrostatic precipitator includes a plurality of carbon fiber filaments, and the plurality of carbon fiber filaments are staggered and arranged to enclose a plurality of ventilation holes.

[0021] Furthermore, the absorption tower also includes:

[0022] A dust collecting member is arranged in the communicating cavity, and the dust collecting member is arranged below the electrostatic precipitator. The dust collecting member includes a plurality of staggered collecting strips, and the plurality of collecting strips surround a plurality of flow holes; the plurality of flow holes are arranged in one-to-one correspondence with the plurality of vent holes, and each flow hole is arranged opposite to the corresponding vent hole; the plurality of collecting strips are arranged in one-to-one correspondence with the plurality of carbon fiber filaments, and each collecting strip is arranged below the corresponding carbon fiber filament;

[0023] Wherein, each collecting strip is provided with a collecting groove, and the groove opening of the collecting groove is arranged toward the corresponding carbon fiber filament.

[0024] Further, the aperture of the vent hole is d1, 10mm≤d1≤50mm; and / or,

[0025] The aperture of the flow hole is d2, 10mm≤d2≤50mm.

[0026] Furthermore, a first clamping portion is provided on the electrostatic precipitator, and a second clamping portion matched with the first clamping portion is provided on the dust collecting member, and the dust collecting member is detachably arranged on the electrostatic precipitator via the first clamping portion and the second clamping portion.

[0027] Further, the heat exchanger is arranged on a side of the dry bed close to the electrostatic precipitator; and / or,

[0028] The heat exchanger is a fin heat exchange structure.

[0029] By applying the technical solution of the present invention, the structure of the electrostatic precipitator combined with the dry bed and the heat exchanger does not need to add additional water, acid or additives, which can not only improve the dust removal effect, but also effectively reduce energy consumption. The dust removal can also be effectively carried out by setting up a dry bed, and the temperature can be effectively reduced by setting up a heat exchanger. The absorption tower provided by Benshi Shishi can effectively reduce the emission of amines and particulate matter. Condensation and dry bed cooling can both reduce amine emissions, and particulate matter is treated by electrostatic precipitator. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0031] Figure 1 A schematic structural diagram of an absorption tower provided according to an embodiment of the present invention is shown;

[0032] Figure 2 A schematic structural diagram of an electrostatic precipitator provided according to an embodiment of the present invention is shown.

[0033] The above drawings include the following reference numerals:

[0034] 10. Tower body; 11. Smoke inlet; 12. Exhaust outlet; 13. Connecting cavity;

[0035] 20. Dry bed; 30. Heat exchanger;

[0036] 40. Electrostatic precipitator; 41. Ventilation hole; 42. Carbon fiber filament;

[0037] 50. concentration detection structure; 51. first concentration detection element; 52. second concentration detection element;

[0038] 60. Dust collection parts. DETAILED DESCRIPTION

[0039] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0040] like Figure 1 As shown, an embodiment of the present invention provides an absorption tower, which includes: a tower body 10, a dry bed 20, a heat exchanger 30 and an electrostatic precipitator 40, the tower body 10 has a flue gas inlet 11, an exhaust port 12 and a connecting cavity 13 connected to both the flue gas inlet 11 and the exhaust port 12, and the exhaust port 12 is located above the flue gas inlet 11; the dry bed 20 and the heat exchanger 30 are both arranged in the connecting cavity 13; the electrostatic precipitator 40 is arranged in the connecting cavity 13, and the electrostatic precipitator 40 is arranged above the dry bed 20 and the heat exchanger 30, and the electrostatic precipitator 40 adsorbs impurities in the connecting cavity 13 by generating an electric field.

[0041] By using the absorption tower provided in this embodiment, there is no need to add additional water, acid or additives through the structure of combining electrostatic precipitator with dry bed 20 and heat exchanger 30, which can not only improve the dust removal effect, but also effectively reduce energy consumption. By setting up the dry bed 20, dust removal can also be effectively performed, and by setting up the heat exchanger 30, cooling can be effectively performed. By using the absorption tower provided by this embodiment, the emission of amines and particulate matter can be effectively reduced. Condensation and cooling of the dry bed 20 can both reduce amine emissions, and particulate matter is treated by electrostatic precipitator. Therefore, the absorption tower provided in this embodiment can solve the technical problem that the absorption tower in the prior art often needs to add a large amount of water, acid or additives, resulting in high costs.

[0042] Specifically, the gas in the absorption tower flows from the flue gas inlet 11 to the exhaust port 12 , and flows out through the exhaust port 12 .

[0043] Specifically, the absorption tower also includes a concentration detection structure 50 and a control member. The concentration detection structure 50 is arranged in the connecting cavity 13, and the concentration detection structure 50 is used to detect the concentration of the flue gas components in the connecting cavity 13. The electrostatic precipitator 40 and the concentration detection structure 50 are both connected to the control member, and the control member adjusts the electric field voltage of the electrostatic precipitator 40 according to the concentration detected by the concentration detection structure 50. With such a structural setting, it is convenient to adjust the electric field voltage in real time according to the concentration in the connecting cavity 13, and realize flexible regulation of the electrostatic precipitator 40, so as to ensure the dust removal effect in the connecting cavity 13, avoid the situation where the concentration of the flue gas components at the discharge port 12 is still large, and effectively ensure the dust removal effect. In addition, when the concentration in the connecting cavity 13 is low, the electric field voltage of the electrostatic precipitator 40 can be effectively reduced, energy waste can be avoided, and energy can be saved.

[0044] In this embodiment, the concentration detection structure 50 includes a first concentration detection member 51 and a second concentration detection member 52, wherein the first concentration detection member 51 is arranged below the electrostatic precipitator 40; and the second concentration detection member 52 is arranged above the electrostatic precipitator 40. The control member adjusts the electric field voltage of the electrostatic precipitator 40 according to the concentration difference between the concentration detected by the first concentration detection member 51 and the concentration detected by the second concentration detection member 52; when the concentration difference between the concentration detected by the first concentration detection member 51 and the concentration detected by the second concentration detection member 52 is within a preset difference range and the concentration detected by the first concentration detection member 51 is greater than the concentration detected by the second concentration detection member 52, the control member controls the electric field voltage of the electrostatic precipitator 40 to remain unchanged or decrease; when the concentration difference between the concentration detected by the first concentration detection member 51 and the concentration detected by the second concentration detection member 52 exceeds the preset difference range or the concentration detected by the first concentration detection member 51 is less than the concentration detected by the second concentration detection member 52, the control member controls the electric field voltage of the electrostatic precipitator 40 to increase. Adopting such a setting can facilitate further flexible control of the electrostatic precipitator 40, so as to better confirm whether the current electric field voltage of the electrostatic precipitator 40 can effectively meet the dust removal demand, and when the electric field voltage of the electrostatic precipitator 40 cannot meet the dust removal demand, increase the electric field voltage of the electrostatic precipitator 40; when the electric field voltage of the electrostatic precipitator 40 can meet the dust removal demand, maintain the current electric field voltage of the electrostatic precipitator 40; when the electric field voltage of the electrostatic precipitator 40 exceeds the dust removal demand, reduce the power plant voltage of the electrostatic precipitator 40.

[0045] Specifically, the electrostatic precipitator 40 has an inlet end and an outlet end, and the outlet end is located on a side of the inlet end close to the exhaust port 12 .

[0046] Specifically, the first concentration detection element 51 is disposed at the inlet end so as to more accurately detect the flue gas concentration at the inlet end of the electrostatic precipitator 40 and ensure the detection accuracy.

[0047] Specifically, the second concentration detection element 52 is disposed at the outlet end so as to more accurately detect the flue gas concentration at the outlet end of the electrostatic precipitator 40 and ensure the detection accuracy.

[0048] By setting the positions of the first concentration detection element 51 and the second concentration detection element 52, it is possible to more accurately obtain the concentration difference at the inlet and outlet ends of the electrostatic precipitator 40.

[0049] like Figure 2 As shown, in this embodiment, the periphery of the electrostatic precipitator 40 is matched with the periphery of the inner wall of the connecting chamber 13, and the periphery of the electrostatic precipitator 40 is installed on the inner wall of the connecting chamber 13, and a plurality of vents 41 are arranged at intervals on the electrostatic precipitator 40. In this way, it is easy to ensure the normal circulation of the fluid in the connecting chamber 13, and at the same time, it is easy to smoothly and stably remove dust from the gas in the circulation chamber.

[0050] Specifically, the electric precipitator 40 in this embodiment includes a plurality of carbon fiber filaments 42, which are arranged in a staggered manner to form a plurality of vents. With such a structural arrangement, it is possible to stably form an electric field and adsorb large particles of impurities, thereby ensuring a dust removal effect.

[0051] In this embodiment, the absorption tower also includes a dust collecting member 60, which is arranged in the connecting chamber 13, and the dust collecting member 60 is arranged below the electrostatic precipitator 40. The dust collecting member 60 includes a plurality of staggered collecting strips, and the plurality of collecting strips surround a plurality of flow holes; the plurality of flow holes are arranged one-to-one with the plurality of vents, and each flow hole is arranged relative to the corresponding vent; the plurality of collecting strips are arranged one-to-one with the plurality of carbon fiber filaments, and each collecting strip is arranged below the corresponding carbon fiber filament. Wherein, each collecting strip is provided with a collecting groove, and the groove of the collecting groove is arranged toward the corresponding carbon fiber filament. In this way, when there is too much dust on the carbon fiber filament of the electrostatic precipitator 40, it can be collected through the collecting groove, so as to avoid the dust on the carbon fiber filament from falling into the connecting chamber 13 again, causing secondary pollution to the gas in the connecting chamber 13.

[0052] Specifically, the aperture of the vent hole is d1, 10mm≤d1≤50mm, so that the gas in the communication cavity 13 can be smoothly circulated and dust can be effectively removed, thereby avoiding the situation where the dust removal effect is poor due to the aperture of the vent hole being too large, and the situation where the air circulation is not convenient due to the aperture of the vent hole being too small.

[0053] Specifically, the aperture of the circulation hole is d2, 10mm≤d2≤50mm, so that the gas in the communication cavity 13 can be smoothly circulated and dust can be effectively removed, thereby avoiding the situation where the dust removal effect is poor due to the aperture of the circulation hole being too large, and the situation where the air circulation is not convenient due to the aperture of the circulation hole being too small.

[0054] In this embodiment, the electric dust collector 40 is provided with a first clamping portion, and the dust collecting member 60 is provided with a second clamping portion adapted to the first clamping portion, and the dust collecting member 60 is detachably provided on the electric dust collector 40 through the first clamping portion and the second clamping portion. In this way, the dust collecting member 60 can be easily disassembled and installed, so as to facilitate the cleaning of the dust collecting member 60.

[0055] Specifically, one of the first clamping portion and the second clamping portion is a clamping protrusion, and the other of the first clamping portion and the second clamping portion is a clamping groove matched with the clamping protrusion.

[0056] Specifically, the heat exchanger 30 is disposed on a side of the drying bed 20 close to the electrostatic precipitator 40 so as to reduce the amount of dust remaining on the surface of the heat exchanger 30 after preliminary dust removal on the drying bed 20, thereby better cooling the gas in the connecting chamber 13.

[0057] In this embodiment, the heat exchanger 30 is a fin heat exchange structure to facilitate effective heat exchange.

[0058] Specifically, the drying bed 20 , the heat exchanger 30 and the dust collecting part 60 in this embodiment do not completely block the cross section of the tower body 10 , that is, the gas in the tower body 10 can flow smoothly in the tower body 10 along the direction from the flue gas inlet 11 to the exhaust port 12 .

[0059] From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: low cost, low energy consumption, convenient and flexible dust removal control, and good dust removal effect.

[0060] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0061] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0062] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0063] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0064] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An absorption tower, characterized in that: include: A tower body (10), the tower body (10) comprising a smoke inlet (11), an exhaust port (12), and a connecting cavity (13) connected to both the smoke inlet (11) and the exhaust port (12), wherein the exhaust port (12) is located above the smoke inlet (11); The drying bed (20) and the heat exchanger (30) are both arranged in the communicating chamber (13); An electrostatic precipitator (40) is arranged in the connecting chamber (13). The electrostatic precipitator (40) is arranged above the drying bed (20) and the heat exchanger (30). The electrostatic precipitator (40) adsorbs impurities in the connecting chamber (13) by generating an electric field.

2. The absorption tower according to claim 1, characterized in that The absorption tower also includes: A concentration detection structure (50) is arranged in the communicating cavity (13), and the concentration detection structure (50) is used to detect the concentration of smoke components in the communicating cavity (13); A control component, the electrostatic precipitator (40) and the concentration detection structure (50) are both connected to the control component, and the control component adjusts the electric field voltage of the electrostatic precipitator (40) according to the concentration detected by the concentration detection structure (50).

3. The absorption tower according to claim 2, characterized in that The concentration detection structure (50) comprises: A first concentration detection element (51) is arranged below the electrostatic precipitator (40); A second concentration detection member (52) is disposed above the electrostatic precipitator (40); The control component adjusts the electric field voltage of the electrostatic precipitator (40) according to the concentration difference between the concentration detected by the first concentration detection component (51) and the concentration detected by the second concentration detection component (52); when the concentration difference between the concentration detected by the first concentration detection component (51) and the concentration detected by the second concentration detection component (52) is within a preset difference range and the concentration detected by the first concentration detection component (51) is greater than the concentration detected by the second concentration detection component (52), the control component controls the electric field voltage of the electrostatic precipitator (40) to remain unchanged or to decrease; when the concentration difference between the concentration detected by the first concentration detection component (51) and the concentration detected by the second concentration detection component (52) exceeds the preset difference range or the concentration detected by the first concentration detection component (51) is less than the concentration detected by the second concentration detection component (52), the control component controls the electric field voltage of the electrostatic precipitator (40) to increase.

4. The absorption tower according to claim 3, characterized in that The electrostatic precipitator (40) has an inlet end and an outlet end, wherein the outlet end is located on a side of the inlet end close to the discharge port (12); Wherein, the first concentration detection element (51) is arranged at the inlet end; and / or, The second concentration detecting member (52) is arranged at the outlet end.

5. The absorption tower according to claim 1, characterized in that The periphery of the electrostatic precipitator (40) is matched with the periphery of the inner wall of the connecting cavity (13), the periphery of the electrostatic precipitator (40) is installed on the inner wall of the connecting cavity (13), and a plurality of ventilation holes (41) are arranged at intervals on the electrostatic precipitator (40).

6. The absorption tower according to claim 5, characterized in that The electrostatic precipitator (40) comprises a plurality of carbon fiber filaments (42), and the plurality of carbon fiber filaments (42) are arranged in a staggered manner to surround the plurality of ventilation holes (41).

7. The absorption tower according to claim 6, characterized in that The absorption tower also includes: A dust collecting member (60) is arranged in the communicating cavity (13), the dust collecting member (60) is arranged below the electrostatic precipitator (40), the dust collecting member (60) comprises a plurality of staggered collecting strips, the plurality of collecting strips enclose a plurality of circulation holes; the plurality of circulation holes are arranged in one-to-one correspondence with the plurality of ventilation holes (41), and each of the circulation holes is arranged opposite to the corresponding ventilation hole (41); the plurality of collecting strips are arranged in one-to-one correspondence with the plurality of carbon fiber filaments (42), and each of the collecting strips is arranged below the corresponding carbon fiber filament (42); Wherein, each of the collecting strips is provided with a collecting groove, and the groove opening of the collecting groove is arranged toward the corresponding carbon fiber filament (42).

8. The absorption tower according to claim 7, characterized in that The aperture of the vent hole (41) is d1, 10 mm ≤ d1 ≤ 50 mm; and / or, The aperture of the flow hole is d2, 10mm≤d2≤50mm.

9. The absorption tower according to claim 7, characterized in that: The electrostatic precipitator (40) is provided with a first clamping portion, and the dust collecting component (60) is provided with a second clamping portion adapted to the first clamping portion. The dust collecting component (60) is detachably arranged on the electrostatic precipitator (40) via the first clamping portion and the second clamping portion.

10. The absorption tower according to claim 1, characterized in that The heat exchanger (30) is arranged on a side of the dry bed (20) close to the electrostatic precipitator (40); and / or, The heat exchanger (30) is a fin heat exchange structure.

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