Desulfurizing absorption tower

Abstract

The desulfurization absorption tower comprises a tower body and a pipeline circulation system, the tower body comprises a smoke inlet and a smoke outlet, a desulfurization space is arranged in the tower body, the smoke inlet and the smoke outlet are respectively communicated with the desulfurization space, and the tower body further comprises one or more sampling ports and a backflow port which are communicated with the desulfurization space; the pipeline circulation system does not comprise sampling pipelines connected to the sampling port and a backflow pipeline connected to the backflow port, one or more sampling pipelines are communicated with the backflow pipeline, each sampling pipeline is provided with a pH detection assembly, at least one sampling pipeline is provided with a density detection assembly, the backflow pipeline is provided with a pump body, and the pump body is communicated with the sampling port. The separation absorption tower can be used for detecting the density of slurry in the tower, so that the removal effect of the slurry on sulfur dioxide in flue gas can be judged.

Description

Technical Field

[0001] The present disclosure relates to the technical field of pH measurement of desulfurization absorption towers, and specifically, to a desulfurization absorption tower. Background Art

[0002] In the related art, as the core component of the desulfurization system, the desulfurization efficiency of the desulfurization absorption tower for sulfur dioxide is related to whether the subsequent flue gas emissions meet the environmental protection standards. Measuring the pH of the slurry used for desulfurization is one of the indicators for detecting the desulfurization efficiency of the slurry. However, the desulfurization efficiency of the slurry for sulfur dioxide is not only related to its own pH. Judging the desulfurization effect only by the pH of the slurry is relatively general and cannot reflect other numerical states of the slurry except for its pH, and thus there is an error from the actual desulfurization effect of the slurry. Summary of the Utility Model

[0003] The purpose of the present disclosure is to provide a desulfurization absorption tower that can detect the density of the slurry in the tower to be able to judge the desulfurization effect of the slurry on sulfur dioxide in the flue gas, so as to at least partially solve the above technical problems.

[0004] To achieve the above purpose, the present disclosure provides a desulfurization absorption tower, including: a tower body including a flue gas inlet and a flue gas outlet, a desulfurization space is provided inside the tower body, the flue gas inlet and the flue gas outlet are respectively communicated with the desulfurization space, and the tower body further includes one or more sampling ports and a reflux port communicated with the desulfurization space; and a pipeline circulation system including a sampling pipeline connected to the sampling port and a reflux pipeline connected to the reflux port, one or more of the sampling pipelines are communicated with the reflux pipeline, a pH detection component is provided on each sampling pipeline, a density detection component is provided on at least one of the sampling pipelines, and a pump body is provided on the reflux pipeline.

[0005] Optionally, the number of the sampling ports is multiple and they are arranged at intervals along the height direction of the tower body, the number of the sampling pipelines is multiple and they are connected to the multiple sampling ports one by one. Among the multiple sampling ports, the density detection component is provided on the sampling pipeline communicated with the lowest-positioned sampling port.

[0006] Optionally, the pipeline circulation system further includes a bypass pipeline, the bypass pipeline is connected to the sampling pipeline where the density detection component is located and is arranged in parallel with the density detection component, and a first valve body is provided on the bypass pipeline.

[0007] Optionally, the first valve body is configured as a diaphragm valve.

[0008] Optionally, the density detection component includes a densitometer for detecting the density of the slurry entering the sampling pipeline from the sampling port.

[0009] Optionally, the density detection component further includes two third valve bodies connected to the sampling pipeline. One of the third valve bodies is located on one side of the inlet of the densitometer, and the other third valve body is located on one side of the outlet of the densitometer.

[0010] Optionally, the pH detection component includes a pH detector and a second valve body, and the second valve body is located between the pH detector and the sampling port.

[0011] Optionally, in the sampling pipeline provided with the density detection component, the pH detector is located between the density detection component and the sampling port.

[0012] Optionally, the pipeline circulation system further includes a sewage discharge pipeline, the sewage discharge pipeline is communicated with the return pipeline, and a sewage discharge valve is arranged on the sewage discharge pipeline.

[0013] Optionally, the pump body is configured as a vertical centrifugal pump, and a fifth valve body is arranged on the side of the vertical centrifugal pump away from the return port in the return pipeline.

[0014] Through the above technical solution, that is, the desulfurization absorption tower provided by the present disclosure, when sampling and detecting the slurry in the desulfurization space in the tower body through the desulfurization absorption tower, not only can the pH value of the slurry be detected by the pH detection components on multiple sampling pipelines, but also the density of the slurry can be detected by the density detection component. That is to say, when the slurry naturally falls along the inner wall of the desulfurization space in the tower body, it will enter multiple sampling pipelines from multiple sampling ports. When the slurry flows through multiple sampling pipelines, it will pass through multiple pH detection components and be detected for the pH value, and at least part of the slurry will pass through the density detection component and be detected for the density of the slurry itself. By comparing the detection results with the preset values, the desulfurization effect of the slurry on sulfur dioxide in the desulfurization space can be judged. After the detection is completed, it can be pumped back into the desulfurization space from the return pipeline through the pump body and then from the return port. The desulfurization absorption tower can not only play a role in recycling the slurry, but also can detect the density of the slurry in real time to judge the desulfurization effect of the slurry on sulfur dioxide in the flue gas.

[0015] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation part. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification. Together with the following specific implementation manners, they are used to explain the present disclosure, but do not constitute a limitation to the present disclosure. In the drawings:

[0017] Figure 1 is a schematic structural diagram of the desulfurization absorption tower provided in the exemplary embodiment of the present disclosure;

[0018] Figure 2 It is a schematic structural diagram of the pump body and the fifth valve body provided in the exemplary embodiment of the present disclosure.

[0019] Explanation of Reference Numerals

[0020] 1 - Tower body; 101 - Smoke inlet; 102 - Smoke outlet; 103 - Desulfurization space; 104 - Sampling port; 105 - Return port; 2 - Pipeline circulation system; 210 - Sampling pipeline; 211 - pH detection component; 2111 - pH meter; 2112 - Second valve body; 2113 - Electric butterfly valve; 212 - Density detection component; 2121 - Density meter; 2122 - Third valve body; 220 - Return pipeline; 221 - Pump body; 222 - Fifth valve body; 230 - Bypass pipeline; 231 - First valve body; 240 - Drain pipeline; 241 - Drain valve; 250 - Flushing pipeline; 251 - Fourth valve body; 3 - Sump. Detailed Embodiment

[0021] The following will detail the specific embodiments of the present disclosure with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining and illustrating the present disclosure, and are not used to limit the present disclosure.

[0022] In the present disclosure, unless otherwise stated, the orientation terms such as "inside, outside" refer to the inside and outside relative to the contour of the component or structure itself; "first, second", etc. are used to distinguish one element from another, without sequence and importance. In addition, the same reference numerals in different reference drawings represent the same elements, and the same reference numerals in the same drawing also represent the same elements.

[0023] The present disclosure provides a desulfurization absorption tower. Referring to Figure 1 and Figure 2 as shown, the desulfurization absorption tower includes a tower body 1 and a pipeline circulation system 2. The tower body 1 includes a smoke inlet 101 and a smoke outlet 102. A desulfurization space 103 is provided inside the tower body 1. The smoke inlet 101 and the smoke outlet 102 are respectively communicated with the desulfurization space 103. The tower body 1 further includes one or more sampling ports 104 and a return port 105 communicated with the desulfurization space 103; the pipeline circulation system 2 includes a sampling pipeline 210 connected to the sampling port 104 and a return pipeline 220 connected to the return port 105. One or more sampling pipelines 210 are communicated with the return pipeline 220. A pH detection component 211 is provided on each sampling pipeline 210. A density detection component 212 is provided on at least one sampling pipeline 210. A pump body 221 is provided on the return pipeline 220.

[0024] In the above manner, that is, the desulfurization absorption tower provided by the present disclosure, when sampling and detecting the slurry in the desulfurization space 103 in the tower body 1 through this desulfurization absorption tower, not only can the pH value of the slurry be detected by the pH detection components 211 on the multiple sampling pipelines 210, but also the density of the slurry can be detected by the density detection components 212. That is to say, when the slurry naturally falls along the inner wall of the desulfurization space 103 in the tower body 1, it will enter the multiple sampling pipelines 210 from multiple sampling ports 104. When the slurry flows through the multiple sampling pipelines 210, it will pass through the multiple pH detection components 211 and be detected for its pH value, and it will also pass through the density detection components 212 and be detected for the density of the slurry itself. By comparing the detection results with the preset values, the desulfurization effect of the slurry on sulfur dioxide in the desulfurization space 103 can be judged. After the detection is completed, it can be pumped back into the desulfurization space 103 from the reflux pipeline 220 through the pump body 221 and then from the reflux port 105. This desulfurization absorption tower can not only play a role in recycling the slurry, but also can detect the density of the slurry in real time to be able to judge the desulfurization effect of the slurry on sulfur dioxide in the flue gas.

[0025] It should be noted that in the above-mentioned embodiment, the desulfurization absorption tower only describes the function of detecting the density of the slurry by the density detection components 212. Generally, the slurry density in the desulfurization absorption tower is maintained between 1080 kg / m³ and 1150 kg / m³ to ensure a high desulfurization effect of the slurry on sulfur dioxide. That is, if the value detected by the density detection components 212 is within this range, it can prove that the desulfurization effect of the slurry on sulfur dioxide is high. When the detected value is lower than this range, according to the common methods in the prior art, slurry can be added at the feeding port (not shown in the figures of the present disclosure) of the desulfurization absorption tower to increase the slurry density. When the detected value is higher than this range, water or other suitable liquid media can also be added at the feeding port to dilute the slurry, thereby reducing the slurry density, so as to enable the slurry to always maintain a high desulfurization efficiency for sulfur dioxide.

[0026] In addition, the pH detection components and the density detection components 212 mentioned in the above specific embodiments can also adopt any suitable devices capable of measuring the pH value and density of the slurry. The present disclosure will elaborate in detail below and will not elaborate too much here.

[0027] In some embodiments, refer to Figure 1As shown, the number of sampling ports 104 is multiple and they are arranged at intervals along the height direction of the tower body 1. The number of sampling pipelines 210 is multiple and they are connected to the multiple sampling ports 104 one by one. Among the multiple sampling ports 104, a density detection component 212 is provided on the sampling pipeline 210 connected to the lowest-position sampling port 104. In this way, the lowest-position sampling port 104 is also located at the lowest part of the desulfurization space 103 in the tower body 1. The slurry flows downward in the tower body 1 due to natural gravity and will deposit at the lowest part. The slurry content at the lowest part is relatively high, and the result obtained by detecting the density of the slurry at this position can be more accurate.

[0028] In some embodiments, referring to Figure 1 As shown, the pipeline circulation system 2 further includes a bypass pipeline 230. The bypass pipeline 230 is connected to the sampling pipeline 210 where the density detection component 212 is located and is arranged in parallel with the density detection component 212. A first valve body 231 is provided on the bypass pipeline 230. In this way, the bypass pipeline 230 can play a role in discharging the residual slurry in the pipeline when an accident occurs in the pipeline circulation system 2 or maintenance is required, that is, referring to Figure 1 As shown, when an accident occurs to the density detection component 212 and / or the pH detection component 211 or maintenance and shutdown are required, the first valve body 231 and the sewage discharge valve 241 (which will be described in detail below) can be opened. In this state, the position height of the bypass pipeline 230 and the first valve body 231 in the desulfurization absorption tower should be lower than the position height of the density detection component 212 and / or the pH detection component 211 in the desulfurization absorption tower, so that a small amount of slurry remaining in the sampling pipeline 210 connected to the density detection component 212 and / or the pH detection component 211 can flow through the bypass pipeline 230 to the sewage discharge pipeline 240 (which will be described in detail below) due to gravity and finally flow to the sump 3. In this way, when there is no residual slurry in the sampling pipeline 210, it is more convenient for the staff to repair the pipeline circulation system.

[0029] In some embodiments, referring to Figure 1As shown, the first valve body 231 is configured as a diaphragm valve. In this way, the diaphragm valve has the advantages of simple structure and can reduce fluid resistance. Moreover, the diaphragm valve can also be used to cut off or pass corrosive and viscous slurry media. For example, when the slurry entering the desulfurization space 103 becomes saturated after absorbing sulfur dioxide in the desulfurization space 103, it can no longer continue to absorb sulfur dioxide. At this time, the saturated slurry and a small amount of sulfur dioxide will enter the sampling pipeline 210 together from the sampling port 104. When it is necessary to discharge the saturated slurry and sulfur dioxide from the bypass pipeline 230 for shutdown maintenance of the density detection component 212 and / or the pH detection component 211, the saturated slurry and sulfur dioxide will pass through the opened diaphragm valve and the bypass pipeline 230 where the diaphragm valve is located together. The functionality of the diaphragm valve itself can effectively reduce the corrosion of sulfur dioxide to the diaphragm valve, and thus can improve the service life of the diaphragm valve itself.

[0030] In some embodiments, referring to Figure 1 As shown, the density detection component 212 includes a densitometer 2121, and the densitometer 2121 is used to detect the density of the slurry entering the sampling pipeline 210 from the sampling port 104. In this way, the densitometer 2121 can more accurately detect the density of the slurry passing through the sampling pipeline 210. The densitometer 2121 provided in the present disclosure can be configured as any densitometer capable of measuring the density of the slurry. For example, the densitometer 2121 can be a float densitometer, a hydrostatic densitometer, an ultrasonic densitometer, etc. Specifically, a suitable densitometer can be selected according to different density measurement methods of the slurry, and the present disclosure does not make specific limitations on this.

[0031] In some embodiments, referring to Figure 1As shown, the density detection component 212 further includes two third valve bodies 2122 connected to the sampling pipeline 210. One of the third valve bodies 2122 is located on one side of the inlet of the densitometer 2121, and the other third valve body 2122 is located on one side of the outlet of the densitometer 2121. In this way, when detecting the density of the slurry flowing from the sampling pipeline 210 into the densitometer 2121, to improve the accuracy of the density detection of the slurry, when a part of the slurry enters the densitometer 2121, the two third valve bodies 2122 can be closed simultaneously. At this time, the slurry can be stored in the densitometer 2121, and the density of this part of the slurry can be measured multiple times by the densitometer 2121 and the average value can be taken, thereby improving the accuracy of the density measurement of the slurry. Then, the third valve body 2122 located on the outlet side of the densitometer 2121 can be opened to drain this part of the slurry. Moreover, the densitometer 2121 and the sampling pipeline 210 can also be designed in a detachable installation manner, which is convenient for removing the densitometer 2121 from the sampling pipeline 210 for maintenance or replacement. Before removing the densitometer 2121 from the sampling pipeline 210, the two third valve bodies 2122 can be closed first, thus preventing the slurry in the sampling pipeline 210 from flowing out and polluting the environment. After the densitometer 2121 is repaired, after connecting the densitometer 2121 to the sampling pipeline 210, the two third valve bodies 2122 can be opened again to ensure the normal circulation of the slurry.

[0032] It should be noted that the method for detecting the density of the slurry mentioned in the above embodiment is to detect by temporarily storing the slurry in the densitometer 2121, that is, it can be understood as static measurement. In addition, when both of the two third valve bodies 2122 are in the open state, the slurry will continuously pass through this section of the sampling pipeline 210 where the densitometer 2121 is located, and the densitometer 2121 can also perform dynamic measurement on the density of the passing slurry.

[0033] In some embodiments, referring to Figure 1 As shown, the pH detection component 211 includes a pH detector 2111 and a second valve body 2112. The second valve body 2112 is located between the pH detector 2111 and the sampling port 104. In this way, when it is necessary to detect the pH of the slurry, the second valve body 2112 can be opened to allow the slurry to flow from the sampling port 104 into the pH detector 2111 for detection. Moreover, the pH detector 2111 can also be configured as any device capable of detecting the pH of the slurry. For example, it can be a laboratory acid-base meter or an industrial acid-base meter, etc. The present disclosure does not make specific limitations in this regard. In the present disclosure, in order to enable the slurry to have a high sulfur dioxide removal effect, the pH value can be controlled between 5 and 6 to enable the slurry to always have a high sulfur dioxide removal effect.

[0034] Moreover, referring toFigure 1 As shown, the second valve body 2112 can be configured as a manual butterfly valve. And between the manual butterfly valve and the pH detector 2111, an electric butterfly valve 2113 can also be provided. When the pipeline circulation system 2 of the desulfurization absorption tower is operating normally, the manual butterfly valve can remain in the normally open state. At this time, the staff can control the flow or interception of the slurry in the pipeline circulation system 2 by remotely controlling the electric butterfly valve 2113. When the electric butterfly valve 2113 fails and cannot open or close the valve, the second valve body 2112 configured as a manual butterfly valve can be manually controlled to open or close, so as to realize the double insurance function of valve on-off.

[0035] In some embodiments, referring to Figure 1 As shown, in the sampling pipeline 210 provided with the density detection component 212, the pH detector 2111 is located between the density detection component 212 and the sampling port 104. In this way, the pH detector 2111 can detect the pH value of the slurry in advance. When the slurry is too acidic or too alkaline, the third valve body 2122 can be closed to prevent the internal components of the densitometer 2121 from being corroded by the slurry, improving the safety protection effect on the densitometer 2121.

[0036] In some embodiments, referring to Figure 1 As shown, the pipeline circulation system further includes a flushing pipeline 250 connected to the sampling pipeline 210 and located between the pH detector 2111 and the second valve body 2112. A fourth valve body 251 is provided on the flushing pipeline 250. In this way, the flushing pipeline 250 can function to periodically flush the sampling pipeline 210, so as to make the residual slurry in the internal pipeline of the pipeline circulation system 2 convenient for more accurate measurement of the density and pH of the slurry in the future. And the flushing water for flushing the sampling pipeline 210 can come from the output water of other equipment in the thermal power plant, such as the water discharged from the process water system of the steam turbine unit, and enter the sampling pipeline 210 through the flushing pipeline 250 and then be pumped to the return pipeline 220 and the return port 105 through the pump body 221. And an electric butterfly valve 2113 can also be provided on the flushing pipeline 250 to achieve the effect of remote automatic control. In addition, when the slurry density is too high, the flushing water can also flow back into the desulfurization space 103 through the return port 105 and be mixed with the slurry to play a role in diluting the slurry.

[0037] In some embodiments, referring to Figure 1 As shown, the pipeline circulation system further includes a sewage pipeline 240. The sewage pipeline 240 is connected to the return pipeline 220, and a sewage valve 241 is provided on the sewage pipeline 240. In this way, the sewage pipeline 240 can function to discharge the slurry from the pipeline circulation system 2 when there are too many impurities in the slurry and cannot be cleaned, that is, referring toFigure 1 As shown, when it is necessary to discharge the slurry with excessive impurities, the first valve body 231 mentioned in the above embodiments can be combined. At the same time, the first valve body 231 and the sewage discharge valve 241 are opened, and the two third valve bodies 2122 are closed. The bypass pipeline 230 and the sewage discharge pipeline 240 are also in a connected state. At this time, the slurry will flow from the bypass pipeline 230 to the sewage discharge pipeline 240, so as to discharge the slurry with excessive impurities into the sump 3, avoiding the slurry from flowing back to the return pipeline 220 and entering the desulfurization space 103 from the return port 105 to cause secondary pollution.

[0038] In some embodiments, referring to Figure 1 and Figure 2 As shown, the pump body 221 is configured as a vertical centrifugal pump, and a fifth valve body 222 is provided on the side of the vertical centrifugal pump away from the return port 105 of the return pipeline 220. In this way, when the slurry in the pipeline circulation system 2 is circulated by the vertical centrifugal pump, the fifth valve body 222 can be opened. At this time, the slurry will flow back to the return pipeline 220 under the pumping of the vertical centrifugal pump and flow back into the desulfurization space 103 from the return port 105 for secondary utilization. The vertical centrifugal pump can not only reduce energy consumption, but also improve the pumping efficiency of the slurry.

[0039] The present disclosure exemplarily describes the specific process of circulating and pumping the slurry in the desulfurization absorption tower. For example, it may include the following steps:

[0040] The slurry flows down by natural gravity along the inner wall of the tower body 1. When it flows to the sampling port 104, it can enter the sampling pipeline 210. In the state where the second valve body 2112 and the electric butterfly valve 2113 are opened, the slurry enters the pH detector 2111 for detection, and the detection result is fed back to the staff in the form of data. The slurry continues to flow in the sampling pipeline 210. When the first valve body 231 is closed and the third valve body 2122 is opened, the slurry can enter the densitometer 2121 for density detection. After flowing out of the densitometer 2121, when the fifth valve body 222 is opened, the slurry can be pumped to the return pipeline 220 under the pumping of the pump body 221 and flow back into the desulfurization space 103 in the tower body 1 from the return port 105 to desulfurize the flue gas flowing from the inlet 101 to the outlet 102 again.

[0041] When there are too many impurities or dirt in the slurry and it is necessary to perform an external discharge operation on the slurry, the third valve body 2122 can be closed, the first valve body 231 and the sewage discharge valve 241 can be opened, and the fifth valve body 222 can be closed. At this time, the slurry will flow from the bypass pipeline 230 to the sewage discharge pipeline 240, and finally the slurry will flow into the sump 3.

[0042] The preferred embodiments of the present disclosure have been described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0043] In addition, it should be noted that, in the various specific technical features described in the above specific embodiments, they can be combined in any appropriate manner without conflict. To avoid unnecessary repetition, the present disclosure will not separately describe various possible combination manners.

[0044] Furthermore, any combination can be made among various different embodiments of the present disclosure as long as it does not violate the idea of the present disclosure, and it should also be regarded as the content disclosed by the present disclosure.

Claims

1. A desulfurization absorption tower, characterized in that, Comprising: A tower body, including a smoke inlet and a smoke outlet, a desulfurization space is provided inside the tower body, the smoke inlet and the smoke outlet are respectively communicated with the desulfurization space, and the tower body further includes one or more sampling ports and a reflux port communicated with the desulfurization space; and A pipeline circulation system, including a sampling pipeline connected to the sampling port and a reflux pipeline connected to the reflux port, one or more of the sampling pipelines are communicated with the reflux pipeline, a pH detection component is provided on each sampling pipeline, a density detection component is provided on at least one sampling pipeline, and a pump body is provided on the reflux pipeline.

2. The desulfurization absorption tower according to claim 1, wherein The number of the sampling ports is multiple and they are arranged at intervals along the height direction of the tower body, the number of the sampling pipelines is multiple and they are connected to the multiple sampling ports one by one, among the multiple sampling ports, the density detection component is provided on the sampling pipeline communicated with the lowest-positioned sampling port.

3. The desulfurization absorption tower according to claim 2, characterized in that, The pipeline circulation system further includes a bypass pipeline, the bypass pipeline is connected to the sampling pipeline where the density detection component is located and is arranged in parallel with the density detection component, and a first valve body is provided on the bypass pipeline.

4. The desulfurization absorption tower according to claim 3, characterized in that, The first valve body is configured as a diaphragm valve.

5. The desulfurization absorption tower according to claim 1, characterized in that, The density detection component includes a densitometer, and the densitometer is used for detecting the density of the slurry entering the sampling pipeline from the sampling port.

6. The desulfurization absorption tower according to claim 5, characterized in that, The density detection component further includes two third valve bodies connected to the sampling pipeline, one of the third valve bodies is located on one side of the inlet of the densitometer, and the other third valve body is located on one side of the outlet of the densitometer.

7. The desulfurization absorption tower according to claim 1, characterized in that, The pH detection component includes a pH detector and a second valve body, and the second valve body is located between the pH detector and the sampling port.

8. The desulfurization absorption tower according to claim 7, characterized in that, In the sampling pipeline where the density detection component is provided, the pH detector is located between the density detection component and the sampling port.

9. The desulfurization absorption tower according to claim 1, characterized in that, The pipeline circulation system further includes a sewage discharge pipeline, the sewage discharge pipeline is communicated with the reflux pipeline, and a sewage discharge valve is provided on the sewage discharge pipeline.

10. The desulfurization absorption tower according to claim 1, characterized in that, The pump body is configured as a vertical centrifugal pump, and a fifth valve body is provided on the reflux pipeline on the side of the vertical centrifugal pump away from the reflux port.

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