Treatment system applied to flue gas desulfurization and control method

Abstract

The invention provides a treatment system applied to flue gas desulfurization and a control method, and relates to the technical field of flue gas treatment. The treatment system comprises a desulfurization tower with a gas-liquid separation device and an exhaust pipe, a reaction tank for reacting flue gas with ammonia liquid, a first transmission pipeline, at least one detector and a plurality of first transmission pumps with frequency converters, each first transmission pump body is used for transmitting liquid obtained after flue gas and ammonia liquid in the reaction tank are subjected to desulfurization reaction to the gas-liquid separation device for gas-liquid separation, and a detector is arranged on the exhaust pipe and used for detecting PH data in exhausted gas and determining the PH value of the exhausted gas according to the corresponding PH data. And the output power of the multiple first transmission pump bodies and the opening or closing of the multiple first transmission pump bodies are changed in real time, and the problem that in the prior art, sulfur dioxide in flue gas in a certain emission time period possibly exceeds the standard when desulfurization equipment runs for a long time can be solved through the arrangement.

Description

Technical Field

[0001] This invention relates to the field of flue gas treatment technology, and in particular to a treatment system and control method for flue gas desulfurization. Background Technology

[0002] During the process of flue gas emission, it is necessary to treat the harmful substances in the flue gas to ensure that the various indicators in the flue gas can meet the emission standards. For example, sulfur dioxide in flue gas is a common air pollutant, mainly from the combustion of fossil fuels and industrial production processes. Excessive emission of flue gas containing sulfur dioxide may cause serious harm such as respiratory problems, cardiovascular problems, ecosystem damage, air pollution and climate change. Therefore, it is necessary to treat sulfur dioxide in flue gas.

[0003] In existing technologies, ammonia desulfurization is commonly used to treat flue gas. Ammonia desulfurization can remove sulfur dioxide from flue gas, and the waste gas is directly discharged into the atmosphere after treatment. However, the concentration of sulfur dioxide in the treated flue gas is not detected. As a result, during the emission process, the ammonia liquid may not react completely with sulfur dioxide or ammonia may escape. Especially when the desulfurization equipment is running for a long time, the sulfur dioxide in the flue gas may exceed the standard during a certain emission period, thus causing the emission problem to exceed the standard. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide a treatment system and control method for flue gas desulfurization, so as to solve the technical problem in the background art that, given that ammonia liquid may not react completely with sulfur dioxide or ammonia may escape, especially when the desulfurization equipment is running for a long time, sulfur dioxide in the flue gas may exceed the standard during a certain emission period, thus resulting in excessive emissions.

[0005] One aspect of the present invention is to provide a treatment system for flue gas desulfurization, comprising a desulfurization tower having a gas-liquid separation device and an exhaust pipe, a reaction tank for reacting flue gas and ammonia liquid, a first transmission pipeline for connecting the reaction tank and the desulfurization tower, at least one detector, and a plurality of first transmission pumps having frequency converters. The first transmission pipeline includes a first main body and a plurality of first sub-pipes connected to the first main body. The first main body is connected to the desulfurization tower, and the first sub-pipes are connected to the reaction tank. Each of the first transfer pump bodies is respectively installed on each of the first sub-pipe bodies, and each of the first transfer pump bodies is used to transfer the liquid after the desulfurization reaction of flue gas and ammonia liquid in the reaction tank to the gas-liquid separation device for gas-liquid separation. One of the detectors is installed on the exhaust pipe to detect the pH data in the exhaust gas, and to adjust the output power of the plurality of first transmission pumps and the opening or closing of the plurality of first transmission pumps in real time according to the corresponding pH data.

[0006] Furthermore, the processing system also includes a second transmission pipeline, multiple second transmission pumps, and a storage tank for containing alkaline liquid; The second transmission pipeline is used to connect the reaction tank and the storage tank. A plurality of second transmission pumps are provided on the second transmission pipeline to transfer the alkaline liquid in the storage tank to the reaction tank, so that the alkaline solution can be mixed and reacted with flue gas and ammonia liquid.

[0007] Furthermore, the second transmission pipeline includes a second main pipe and a plurality of second sub-pipes connected to the second main pipe. The second main pipe is connected to the reaction vessel, and the second sub-pipes are connected to the storage vessel. Each of the second transfer pump bodies is respectively disposed on each of the second sub-pipe bodies.

[0008] Furthermore, the processing system includes a first detector and a second detector; The first detector and the second detector are respectively installed on the exhaust pipe and the first main body. The first detector is used to detect the first pH data of the gas emitted in the exhaust pipe, and the second detector is used to detect the second pH data of the liquid in the first main body. The output power of the plurality of first transfer pumps and the opening or closing of the plurality of first transfer pumps are changed in real time according to the first pH data, and the output power of the plurality of second transfer pumps and the opening or closing of the plurality of first transfer pumps are changed in real time according to the second pH data.

[0009] Furthermore, the first transmission pipeline also includes a valve and a drain pipe connected to the first main body, wherein the valve is disposed on the drain pipe; The drain pipe is located after the second detector, so that the valve can be opened or closed according to the second pH data. The drain pipe is used to discharge the ammonia liquid in the reaction tank.

[0010] Furthermore, the processing system also includes a third transmission pipeline and a third pump body; The third transmission pipeline is used to connect the gas-liquid separation device to the reaction tank, and the third pump body is used to transfer the separated ammonia liquid in the gas-liquid separation device to the reaction tank through the third transmission pipeline.

[0011] Another aspect of the present invention provides a control method for a flue gas desulfurization treatment system, the control method being used to control the flue gas desulfurization treatment system, the control method comprising: Obtain the first pH data detected by the first detector in the exhaust pipe; Determine whether the first pH data is within the preset pH data range; If the first pH data is greater than the preset pH data range, then the output power of the multiple first transmission pumps and the opening or closing of the multiple first transmission pumps are controlled, so that the first detector detects that the first pH data in the exhaust pipe is within the preset pH data range.

[0012] Furthermore, after the step of determining whether the first pH data is within the preset pH data range, the method further includes: If the first pH data is greater than the preset pH data range; Based on the first pH data and the first output power of each of the first transfer pumps, determine the number of the first transfer pumps to be turned on. When the sum of the first output power of any number of the first transfer pumps is equal to the first pH data, the corresponding first transfer pump is controlled to turn on and output at the first output power. Wherein, the first output power is the maximum output power of the first transmission pump body.

[0013] Furthermore, after the step of determining whether the first pH data is within the preset pH data range, the method further includes: If the first pH data is greater than the preset pH data range; Based on the first pH data and the second output power of each of the first transfer pumps, determine the number of the first transfer pumps to be turned on. When the sum of the second output power of the multiple first transfer pumps is equal to the first pH data, then each of the first transfer pumps is controlled to start simultaneously and output at the first output power. Wherein, the second output power is less than the first output power.

[0014] Furthermore, after the step of determining whether the first pH data is within the preset pH data range, the method further includes: If the first pH data is less than the preset pH data range; Based on the first pH data and the third output power of each of the first transfer pumps, determine the number of the first transfer pumps to be turned on. When the sum of the third output power of multiple first transfer pumps is equal to the first pH data, then each first transfer pump is controlled to start simultaneously and output at the third output power. The third output power is less than the first output power and the second output power.

[0015] Compared with existing technologies, the advantages of using the treatment system and control method for flue gas desulfurization as shown in this invention are as follows: The present invention provides a flue gas desulfurization system, comprising a desulfurization tower with a gas-liquid separation device and an exhaust pipe, a reaction tank for reacting flue gas and ammonia liquid, a first transmission pipeline connecting the reaction tank and the desulfurization tower, at least one detector, and multiple first transmission pumps equipped with frequency converters. In specific implementation, flue gas is first piped into the reaction tank, where the ammonia liquid reacts with the flue gas to desulfurize sulfur dioxide. The reacted gas-liquid mixture is then transported through the first transmission pipeline and the multiple first transmission pumps equipped with frequency converters to the desulfurization tower, where gas-liquid separation is performed using the gas-liquid separation device. The desulfurized flue gas is then... The flue gas will be discharged through the exhaust pipe. During the exhaust process, the pH data of the discharged flue gas is monitored in real time by the first detector. The output power and the opening and closing of the multiple first transfer pumps are adjusted in real time based on the pH data. In other words, when the pH data is greater than the preset pH data range, it can be determined that the sulfur dioxide in the flue gas exceeds the standard. The operation status of the multiple first transfer pumps is controlled according to the pH data to ensure that the sulfur dioxide content in the flue gas meets the standard. Moreover, the first detector monitors the pH data in real time, which can solve the technical problem in the existing technology that the sulfur dioxide in the flue gas may exceed the standard during a certain period of emission due to the long-term operation of the desulfurization equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a treatment system applied to flue gas desulfurization according to an embodiment of the present invention; Figure 2 This is a flowchart of a control method for a flue gas desulfurization treatment system according to an embodiment of the present invention.

[0017] In the diagram: 100, desulfurization tower; 110, gas-liquid separation device; 120, exhaust pipe; 200, reaction tank; 300, first transmission pipeline; 310, first main pipe; 320, first sub-pipe; 330, valve; 340, drain pipe; 400, first transmission pump; 500, second transmission pipeline; 510, second main pipe; 520, second sub-pipe; 600, second transmission pump; 700, storage tank; 800, first detector; 900, second detector; 1000, third transmission pipeline; 1001, third pump. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0019] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] First Embodiment Please see Figure 1 The image shows a treatment system for flue gas desulfurization provided in the first embodiment of the present invention. It includes a desulfurization tower 100 with a gas-liquid separation device 110 and an exhaust pipe 120, a reaction tank 200 for reacting flue gas and ammonia liquid, a first transmission pipeline 300 for connecting the reaction tank 200 and the desulfurization tower 100, at least one detector, and multiple first transmission pumps 400 with frequency converters. It should be noted that in some practical applications, the desulfurization tower 100 may include not only the gas-liquid separation device 110 and the exhaust pipe 120, but also other devices. Since these other devices are conventional prior art, they will not be specifically described here.

[0022] Specifically, in this example, the first transmission pipeline 300 includes a first main pipe 310 and a plurality of first sub-pipes 320 connected to the first main pipe 310. The first main pipe 310 is connected to the desulfurization tower 100, and the first sub-pipes 320 are connected to the reaction tank 200. Each of the first transfer pump bodies 400 is respectively disposed on each of the first sub-pipe bodies 320, and each of the first transfer pump bodies 400 is used to transfer the liquid after the desulfurization reaction of flue gas and ammonia liquid in the reaction tank 200 to the gas-liquid separation device 110 for gas-liquid separation. One of the detectors is installed on the exhaust pipe 120 to detect the pH data in the exhaust gas, and to adjust the output power of the plurality of first transmission pumps 400 and the opening or closing of the plurality of first transmission pumps 400 in real time according to the corresponding pH data.

[0023] In practical implementation, the flue gas to be treated is piped into the reaction tank 200. The ammonia solution in the reaction tank 200 reacts with the flue gas, thereby desulfurizing the sulfur dioxide in the flue gas. The reacted gas-liquid mixture is then transported to the desulfurization tower 100 via the first transmission pipeline 300 and multiple first transmission pumps 400 equipped with frequency converters. Gas-liquid separation is performed using the gas-liquid separation device 110. The desulfurized flue gas is then discharged through the exhaust pipe 120. During the exhaust process, the pH data of the discharged flue gas is monitored in real time using the first detector 800. The pH data enables real-time changes in the output power of the multiple first transfer pumps 400 and their on / off states. In other words, when the pH data exceeds a preset pH range, it can be determined that sulfur dioxide in the flue gas exceeds the standard. Based on the pH data exceeding the standard, the operating status of the multiple first transfer pumps 400 is controlled to ensure that the sulfur dioxide content in the flue gas meets the standard. Furthermore, the first detector 800 detects the pH data in real time, which can solve the technical problem in the prior art where sulfur dioxide in the flue gas may exceed the standard during a certain emission period due to the long-term operation of the desulfurization equipment, thus leading to excessive emissions.

[0024] To better understand how this example controls the operation of multiple first transfer pumps 400 based on pH data exceeding the standard, please refer to [link to relevant documentation]. Figure 1 As shown, in this embodiment, there can be two first transfer pump bodies 400, namely first transfer pump body 400A and first transfer pump body 400B. Inverters are arranged on both first transfer pump body 400A and first transfer pump body 400B. The number of first sub-tube bodies 320 is also two, with first transfer pump body 400A and first transfer pump body 400B respectively arranged on two first sub-tube bodies 320.

[0025] For example, when the feedback value of sulfur dioxide in the flue gas detected by the first detector 800 is greater than 75 mg / m3, the frequency converter frequency increases; when the sulfur dioxide feedback value is less than 75 mg / m3, the frequency converter frequency decreases, keeping the sulfur dioxide concentration between 70-80 mg / m3. When specifically controlling the first transfer pump 400A and the first transfer pump 400B, the control of the first transfer pump 400A and the first transfer pump 400B can be selected based on the sulfur dioxide feedback value. When the first transfer pump 400A is selected for operation, it can be controlled by the corresponding frequency converter. The output frequency of the first transfer pump body 400A is controlled; when the first transfer pump body 400B is selected for operation, the output frequency of the first transfer pump body 400B can be controlled by the corresponding frequency converter; when the first transfer pump body 400A and the first transfer pump body 400B are selected for operation at the same time, the operating frequencies of the first transfer pump body 400A and the first transfer pump body 400B can be controlled by the corresponding two frequency converters respectively. It should be noted that when only one of the first transfer pump body 400A / first transfer pump body 400B is selected for operation, the other can be turned off.

[0026] It should be noted that since ammonia has limited desulfurization effect on sulfur dioxide in flue gas, especially for high concentrations of sulfur dioxide, ammonia may not be able to completely absorb it. To ensure the treatment effect on high concentrations of sulfur dioxide, in this embodiment, the treatment system also includes a second transmission pipeline 500, multiple second transmission pumps 600, and a storage tank 700 for containing alkaline liquid. The second transmission pipeline 500 is used to connect the reaction tank 200 and the storage tank 700. The multiple second transmission pumps 600 are all located on the second transmission pipeline 500 and are used to transfer the alkaline liquid in the storage tank 700 to the reaction tank 200, so that the alkaline solution can mix and react with the flue gas and ammonia.

[0027] Specifically, given that the second transmission pipeline 500 includes a second main pipe 510 and a plurality of second sub-pipes 520 connected to the second main pipe 510, the second main pipe 510 is connected to the reaction vessel 200, and the second sub-pipes 520 are connected to the storage tank 700, wherein each second transmission pump body 600 is respectively provided on each second sub-pipe 520.

[0028] In practical implementation, the alkaline liquid can be introduced into the reaction tank 200 using the second transmission pipeline 500, multiple second transmission pumps 600, and a storage tank 700 for containing alkaline liquid. This allows the flue gas, ammonia liquid, and alkaline liquid to mix and react. It should be noted that since ammonia in the ammonia liquid can escape, and ammonia liquid has limited desulfurization effect when treating high concentrations of sulfur dioxide, the two-stage treatment process of introducing alkaline liquid after the ammonia liquid reaction can more efficiently and thoroughly remove sulfur dioxide from the flue gas, while overcoming the limitations of single ammonia treatment. In practical implementation, the efficiency of sulfur dioxide removal can reach 99%.

[0029] Furthermore, the processing system includes a first detector 800 and a second detector 900; The first detector 800 and the second detector 900 are respectively installed on the exhaust pipe 120 and the first main body 310. The first detector 800 is used to detect the first pH data of the gas emitted in the exhaust pipe 120, and the second detector 900 is used to detect the second pH data of the liquid in the first main body 310. The output power of the multiple first transfer pump bodies 400 and the opening or closing of the multiple first transfer pump bodies 400 are changed in real time according to the first pH data, and the output power of the multiple second transfer pump bodies 600 and the opening or closing of the multiple first transfer pump bodies 400 are changed in real time according to the second pH data.

[0030] Furthermore, the first transmission pipeline 300 also includes a valve 330 and a drain pipe 340 connected to the first main body 310, with the valve 330 disposed on the drain pipe 340; The drain pipe 340 is located after the second detector 900, so that the valve 330 is opened or closed according to the second pH data. The drain pipe 340 is used to discharge the ammonia liquid in the reaction tank 200.

[0031] It should be noted that during the process of transferring the gas-liquid mixture to the desulfurization tower 100, a second detector 900 is arranged on the first main pipe 310. The second detector 900 can monitor the pH data before the gas-liquid mixture is transferred to the desulfurization tower 100, which is the aforementioned second pH data. The second pH data can be used to determine whether the pH data in the gas-liquid mixture meets the standard. If it does not meet the standard, it may be that the ammonia liquid in the reaction tank 200 cannot react fully with the flue gas, which may still lead to the problem of sulfur dioxide exceeding the standard. Therefore, in this example, by arranging the second transmission pipeline 500, multiple second transmission pumps 600, and a storage tank 700 for containing alkaline liquid, when the ammonia liquid cannot react fully with the flue gas, the output power of the multiple second transmission pumps 600 and the opening or closing of the multiple first transmission pumps 400 are changed in real time according to the second pH data. By introducing alkaline liquid into the reaction tank 200, efficient desulfurization of sulfur dioxide can be achieved, ensuring the desulfurization effect.

[0032] Furthermore, in some preferred embodiments, the liquid level in the reaction tank 200, the second pH data, the second transfer pump 600, and the opening and closing of the valve 330 can be correlated. For example, when the pH value in the second pH data is less than 7 or the liquid level in the reaction tank 200 is higher than 2000 mm, the valve 330 is opened to drain the liquid; when the liquid level in the reaction tank 200 is higher than or lower than 1000 mm, the valve 330 is closed while the second transfer pump 600 is opened to replenish the liquid. After replenishing 3.5T of liquid (approximately increasing the liquid level by 500 mm), the second transfer pump 600 is closed.

[0033] In addition, to improve the reuse of ammonia liquid, in some embodiments, the processing system also includes a third transmission pipeline 1000 and a third pump 1001. The third transmission pipeline 1000 is used to connect the gas-liquid separator 110 to the reaction tank 200, and the third pump 1001 is used to transfer the separated ammonia liquid in the gas-liquid separator 110 to the reaction tank 200 through the third transmission pipeline 1000, so that the ammonia liquid that has not been completely degraded can be recycled and transferred to the reaction tank 200 for re-reaction, thereby improving the utilization effect of ammonia liquid and reducing the usage cost of ammonia liquid.

[0034] It should be noted that in some preferred embodiments, the first transfer pump 400 can be a recycling washing pump in the prior art, the first detector 800 and the second detector 900 can be pH detectors in the prior art, the valve 330 can be an electric valve 330 in the prior art, and a controller can also be arranged in the processing system to control the operating status of the first transfer pump 400 and the second transfer pump 600. Furthermore, the controller can be a PLC controller in the prior art, or a PID program can be set in the controller for control.

[0035] In summary, the flue gas desulfurization treatment system provided in the first embodiment of the present invention has at least the following effective effects compared with the existing flue gas treatment methods: The flue gas desulfurization system provided by this invention includes a desulfurization tower 100 with a gas-liquid separation device 110 and an exhaust pipe 120, a reaction tank 200 for reacting flue gas and ammonia liquid, a first transmission pipeline 300 connecting the reaction tank 200 and the desulfurization tower 100, at least one detector, and multiple first transmission pumps 400 equipped with frequency converters. In specific implementation, flue gas is first piped into the reaction tank 200, where the ammonia liquid reacts with the flue gas to desulfurize sulfur dioxide. The reacted gas-liquid mixture is then transported through the first transmission pipeline 300 and the multiple first transmission pumps 400 equipped with frequency converters to the desulfurization tower 100, where the gas-liquid separation device 110 performs gas-liquid separation. At this time, the desulfurized flue gas will be discharged through the exhaust pipe 120. During the discharge process, the first detector 800 will monitor the pH data of the discharged flue gas in real time. The output power of multiple first transfer pumps 400 and the opening or closing of multiple first transfer pumps 400 will be changed in real time based on the pH data. That is to say, when the pH data is greater than the preset pH data range, it can be determined that the sulfur dioxide in the flue gas exceeds the standard. The operation status of multiple first transfer pumps 400 will be controlled according to the pH data exceeding the standard, so that the sulfur dioxide content in the flue gas can meet the standard. Moreover, the first detector 800 monitors the pH data in real time, which can solve the technical problem in the existing technology that the sulfur dioxide in the flue gas may exceed the standard during a certain period of emission due to the long-term operation of the desulfurization equipment, thus resulting in excessive emissions.

[0036] Second Embodiment Please see Figure 2 The image shows a control method for a flue gas desulfurization treatment system provided in the second embodiment of the present invention. The control method in this embodiment is used to control a flue gas desulfurization treatment system as described in the first embodiment. The control method includes: S01, Obtain the first pH data detected by the first detector in the exhaust pipe; S02, determine whether the first pH data is within the preset pH data range; S03, if the first pH data is greater than the preset pH data range, then control the output power of the multiple first transmission pumps and the opening or closing of the multiple first transmission pumps, so that the first detector detects that the first pH data in the exhaust pipe is within the preset pH data range.

[0037] Specifically, there can be two first transfer pump bodies, namely first transfer pump body A and first transfer pump body B.

[0038] The preset pH data range can be set to 75 mg / m³. 3 When the feedback value of sulfur dioxide in the flue gas detected by the first detector is greater than 75 mg / m³ 3 When the frequency of the inverter increases, and the sulfur dioxide feedback value is less than 75 mg / m³, the inverter frequency increases. 3 At this time, the frequency of the frequency converter decreases to control the sulfur dioxide concentration at 70-80 mg / m³. Specifically, when controlling the first transfer pump A and the first transfer pump B, they can be simultaneously activated based on the feedback value of sulfur dioxide. The output frequencies of the first transfer pump A and the first transfer pump B can be controlled separately, so that when the first transfer pump A and the first transfer pump B are operating simultaneously, the sulfur dioxide concentration in the flue gas can be controlled at 75 mg / m³. 3 This setting can greatly reduce the consumption of amine solution.

[0039] It should be noted that the output power can be evenly distributed based on the total output power and the number of multiple first transmission pumps, so that the output power of each first transmission pump is consistent. This ensures the stability of the multiple first transmission pumps during operation.

[0040] Furthermore, after determining whether the first pH data is within the preset pH data range, the method further includes: If the first pH value is greater than the preset pH value range; The number of first transfer pumps to be turned on is determined by combining the first pH data and the first output power of each first transfer pump body. When the sum of the first output power of any number of first transfer pumps equals the first pH data, the corresponding first transfer pump is controlled to turn on and output at the first output power. The first output power is the maximum output power of the first transmission pump body.

[0041] It should be noted that, in order to improve energy utilization, the simultaneous operation of multiple first transfer pumps places a high load on the system control. In order to improve the processing effect, in this embodiment, when the sum of the first output power of any number of first transfer pumps is equal to the first pH data, the corresponding first transfer pump is controlled to turn on and output at the first output power, so that the purpose of adjusting the pH data can be met with a very small number of first transfer pumps turned on.

[0042] Preferably, after determining whether the first pH data is within the preset pH data range, the method further includes: If the first pH value is greater than the preset pH value range; The number of first transfer pumps to be turned on is determined by combining the first pH data and the second output power of each first transfer pump body. When the sum of the second output power of multiple first transfer pumps is equal to the first pH data, then each first transfer pump is controlled to start simultaneously and output at the first output power. The second output power is less than the first output power.

[0043] It should be noted that the second output power is the median value of the output power of each of the first transmission pump bodies.

[0044] Preferably, after determining whether the first pH data is within the preset pH data range, the method further includes: If the first pH data is less than the preset pH data range; By combining the first pH data and the third output power of each first transfer pump body, the number of first transfer pump bodies to be turned on is determined; When the sum of the third output power of multiple first transfer pumps is equal to the first pH data, then each first transfer pump is controlled to start simultaneously and output at the third output power. The third output power is less than the first output power and the second output power.

[0045] It should be noted that the second output power is the minimum output power of each of the first transmission pump bodies.

[0046] In summary, the control method for a flue gas desulfurization treatment system provided in the second embodiment of the present invention has at least the following effective effects: By determining whether the first pH data is within the preset pH data range, if the first pH data is greater than the preset pH data range, the opening / closing of multiple first transfer pumps and the corresponding output power of multiple first transfer pumps are controlled in combination with the first pH data and the first / second / third output power of each first transfer pump. This ensures stable output while guaranteeing stable operation of multiple first transfer pumps, greatly reducing the system's operating load.

[0047] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] The above embodiments merely illustrate several implementation methods of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A treatment system for flue gas desulfurization, characterized in that, It includes a desulfurization tower with a gas-liquid separation device and an exhaust pipe, a reaction tank for reacting flue gas and ammonia liquid, a first transmission pipeline for connecting the reaction tank and the desulfurization tower, at least one detector, and multiple first transmission pumps with frequency converters; The first transmission pipeline includes a first main body and a plurality of first sub-pipes connected to the first main body. The first main body is connected to the desulfurization tower, and the first sub-pipes are connected to the reaction tank. Each of the first transfer pump bodies is respectively installed on each of the first sub-pipe bodies, and each of the first transfer pump bodies is used to transfer the liquid after the desulfurization reaction of flue gas and ammonia liquid in the reaction tank to the gas-liquid separation device for gas-liquid separation. One of the detectors is installed on the exhaust pipe to detect the pH data in the exhaust gas, and to adjust the output power of the plurality of first transmission pumps and the opening or closing of the plurality of first transmission pumps in real time according to the corresponding pH data.

2. The treatment system for flue gas desulfurization according to claim 1, characterized in that, The processing system also includes a second transmission pipeline, multiple second transmission pumps, and a storage tank for containing alkaline liquids. The second transmission pipeline is used to connect the reaction tank and the storage tank. A plurality of second transmission pumps are provided on the second transmission pipeline to transfer the alkaline liquid in the storage tank to the reaction tank, so that the alkaline solution can be mixed and reacted with flue gas and ammonia liquid.

3. The treatment system for flue gas desulfurization according to claim 2, characterized in that, The second transmission pipeline includes a second main pipe and a plurality of second sub-pipes connected to the second main pipe. The second main pipe is connected to the reaction vessel, and the second sub-pipes are connected to the storage vessel. Each of the second transfer pump bodies is respectively disposed on each of the second sub-pipe bodies.

4. The treatment system for flue gas desulfurization according to claim 3, characterized in that, The processing system includes a first detector and a second detector; The first detector and the second detector are respectively installed on the exhaust pipe and the first main body. The first detector is used to detect the first pH data of the gas emitted in the exhaust pipe, and the second detector is used to detect the second pH data of the liquid in the first main body. The output power of the plurality of first transfer pumps and the opening or closing of the plurality of first transfer pumps are changed in real time according to the first pH data, and the output power of the plurality of second transfer pumps and the opening or closing of the plurality of first transfer pumps are changed in real time according to the second pH data.

5. The treatment system for flue gas desulfurization according to claim 4, characterized in that, The first transmission pipeline also includes a valve and a drain pipe connected to the first main body, wherein the valve is disposed on the drain pipe; The drain pipe is located after the second detector, so that the valve can be opened or closed according to the second pH data. The drain pipe is used to discharge the ammonia liquid in the reaction tank.

6. The treatment system for flue gas desulfurization according to claim 1, characterized in that, The processing system also includes a third transmission pipeline and a third pump body; The third transmission pipeline is used to connect the gas-liquid separation device to the reaction tank, and the third pump body is used to transfer the separated ammonia liquid in the gas-liquid separation device to the reaction tank through the third transmission pipeline.

7. A control method for a flue gas desulfurization treatment system, characterized in that, The control method is used to control the treatment system applied to flue gas desulfurization as described in claim 5, and the control method includes: Obtain the first pH data detected by the first detector in the exhaust pipe; Determine whether the first pH data is within the preset pH data range; If the first pH data is greater than the preset pH data range, then the output power of the multiple first transmission pumps and the opening or closing of the multiple first transmission pumps are controlled, so that the first detector detects that the first pH data in the exhaust pipe is within the preset pH data range.

8. The control method for a flue gas desulfurization treatment system according to claim 7, characterized in that, After the step of determining whether the first pH data is within the preset pH data range, the method further includes: If the first pH data is greater than the preset pH data range; Based on the first pH data and the first output power of each of the first transfer pumps, determine the number of the first transfer pumps to be turned on. When the sum of the first output power of any number of the first transfer pumps is equal to the first pH data, the corresponding first transfer pump is controlled to turn on and output at the first output power. Wherein, the first output power is the maximum output power of the first transmission pump body.

9. The control method for a flue gas desulfurization treatment system according to claim 8, characterized in that, After the step of determining whether the first pH data is within the preset pH data range, the method further includes: If the first pH data is greater than the preset pH data range; Based on the first pH data and the second output power of each of the first transfer pumps, determine the number of the first transfer pumps to be turned on. When the sum of the second output power of the multiple first transfer pumps is equal to the first pH data, then each of the first transfer pumps is controlled to start simultaneously and output at the first output power. Wherein, the second output power is less than the first output power.

10. The control method for a flue gas desulfurization treatment system according to claim 9, characterized in that, After the step of determining whether the first pH data is within the preset pH data range, the method further includes: If the first pH data is less than the preset pH data range; Based on the first pH data and the third output power of each of the first transfer pumps, determine the number of the first transfer pumps to be turned on. When the sum of the third output power of multiple first transfer pumps is equal to the first pH data, then each first transfer pump is controlled to start simultaneously and output at the third output power. The third output power is less than the first output power and the second output power.

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