Desulfurizing tower liquid level detecting and PH value adjusting device

Abstract

The utility model discloses a desulfurizing tower liquid level detecting and PH value adjusting device which comprises a desulfurizing tower body, a liquid discharging pipe, a liquid level detecting device and a PH value detecting meter are connected to the desulfurizing tower body, the liquid discharging pipe is communicated with a limestone slurry layer and can discharge liquid of the limestone slurry layer, and the liquid level detecting device and the PH value detecting meter are installed on the desulfurizing tower body. The liquid level detection device can detect the liquid level height of a limestone slurry layer, the PH value detection meter can detect the PH value of the limestone slurry layer, the desulfurizing tower liquid level detection and PH value adjusting device further comprises a saturated limestone slurry storage tower, a pump, a liquid conveying pipe and a liquid discharging pipe switch, and saturated limestone slurry is stored in the saturated limestone slurry storage tower. One end of the liquid conveying pipe is connected with the saturated limestone slurry storage tower, and the other end is connected into the desulfurizing tower body; according to the utility model, the saturated limestone slurry layer can be kept at a proper height and a proper pH value through the actions of the pump and the liquid discharge pipe switch.

Description

Technical Field

[0001] This utility model belongs to the technical field of desulfurization towers, and particularly relates to a desulfurization tower liquid level detection and pH adjustment device. Background Technology

[0002] A desulfurization tower is a device used in industry to reduce pollutants such as sulfur dioxide (SO2) in exhaust gases, especially in power plants and petrochemical industries. It removes sulfur dioxide from flue gas through chemical reactions or physical absorption, thereby reducing environmental impact.

[0003] The working principle of a desulfurization tower can be divided into the following steps:

[0004] Flue gas introduction: Flue gas containing sulfur dioxide enters the desulfurization tower through pipelines.

[0005] Spraying or misting: Inside the tower, the flue gas comes into contact with the desulfurization liquid (usually limestone, calcium hydroxide, etc.). The liquid is sprayed or misted within the tower to ensure thorough mixing of the flue gas and the desulfurization liquid.

[0006] Reaction products: Sulfur dioxide reacts chemically with the desulfurization liquid to produce byproducts such as gypsum, which are not easily volatile.

[0007] Clean flue gas discharge: Flue gas that has undergone desulfurization treatment is discharged with its SO2 concentration significantly reduced, meeting environmental emission standards.

[0008] By-product handling: The resulting solid by-products (such as gypsum) can be further processed or used for other purposes.

[0009] In practical use, the desulfurization liquid in the desulfurization tower often evaporates excessively due to high flue gas temperature or high sulfur content in the flue gas, causing the desulfurization liquid to be completely consumed, resulting in the desulfurization tower failing to work properly. Therefore, it is urgent to set up functions such as liquid level detection and pH detection in the desulfurization tower.

[0010] Furthermore, if further research and development can be conducted to add functions such as liquid level detection and pH detection, automatic liquid replenishment can be achieved, which could further reduce the workload of workers. Therefore, this research and development direction is also of great practical significance. Utility Model Content

[0011] The technical problem to be solved by this utility model is to provide a desulfurization tower liquid level detection and pH adjustment device to address the shortcomings of the existing devices.

[0012] To achieve the above-mentioned technical objectives, the technical solution adopted by this utility model is as follows:

[0013] A desulfurization tower liquid level detection and pH adjustment device includes a desulfurization tower body, a sulfur-containing gas input pipe connected to the tower body, a limestone slurry layer at the bottom of the tower body, and a spray device in the middle. The spray device can draw limestone slurry from the limestone slurry layer and spray it onto the sulfur-containing gas input pipe into the desulfurization tower body. A drain pipe, a liquid level detection device, and a pH meter are connected to the desulfurization tower body. The drain pipe is connected to the limestone slurry layer and can discharge the liquid from the limestone slurry layer. The liquid level detection device and the pH meter are installed on the desulfurization tower body. The measuring device can detect the liquid level height of the limestone slurry layer, and the pH meter can detect the pH value of the limestone slurry layer. The desulfurization tower liquid level detection and pH adjustment device also includes a saturated limestone slurry storage tower, a pump, a delivery pipe, and a drain pipe switch. The saturated limestone slurry storage tower contains saturated limestone slurry. One end of the delivery pipe is connected to the saturated limestone slurry storage tower, and the other end is connected to the desulfurization tower body. The pump is installed on the delivery pipe and can pump the saturated limestone slurry in the saturated limestone slurry storage tower into the limestone slurry layer. The drain pipe switch can open or close the drain pipe.

[0014] To optimize the above technical solution, the specific measures also include:

[0015] The desulfurization tower liquid level detection and pH adjustment device also includes a controller. The controller can receive signals from the liquid level detection device and the pH meter, and control the operation of the pump and the opening and closing of the drain pipe switch.

[0016] The liquid level detection device includes a magnetic levitation cavity, a display cavity, a lower inlet pipe, an upper inlet pipe, a magnetic levitation body, and a display magnetic rotating body. The magnetic levitation cavity is a vertical cavity. The lower inlet pipe is horizontally positioned, with one end connected to the desulfurization tower and the other end connected to the lower end of the magnetic levitation cavity. The upper inlet pipe is horizontally positioned, with one end connected to the desulfurization tower and the other end connected to the upper end of the magnetic levitation cavity. The height of the upper inlet pipe is higher than the surface of the limestone slurry layer, and the height of the lower inlet pipe is lower than the surface of the limestone slurry layer. The liquid in the limestone slurry layer fills the magnetic levitation cavity, and the liquid level in the magnetic levitation cavity is level with the height of the limestone slurry layer. The magnetic levitation body floats on the liquid surface of the magnetic levitation cavity, and a first magnet is installed inside the magnetic levitation body. The display cavity is a vertical cavity fixed next to the magnetic levitation cavity. The side of the display cavity facing away from the magnetic levitation cavity is transparent. There are several magnetic display elements arranged vertically at equal intervals inside the display cavity. Each magnetic display element includes a second magnet, which is rotatably disposed in the display cavity. The side of the second magnet facing the magnetic levitation cavity is painted with the display color, while the side of the second magnet facing away from the magnetic levitation cavity is unpainted. The side of the first magnet facing the display cavity and the side of the second magnet facing the magnetic levitation cavity are magnetically repelled. The second magnet, which is at the same height as the first magnet, will rotate due to the repulsive force of the first magnet, causing the side of the second magnet painted with the display color to face away from the magnetic levitation cavity.

[0017] The display magnetic slewing body also includes a torsion spring. The left and right ends of the second magnet are respectively fixed with rotating shafts, which are rotatably arranged in the display cavity. One end of the torsion spring is fixedly connected to the inner wall of the display cavity, and the other end is fixedly connected to the second magnet. The torsion spring has the potential energy to rotate the side of the second magnet that is coated with the display color to face the magnetic levitation cavity.

[0018] The display magnetic rotating body has more than four components, and four of them are equipped with trigger terminals. The inner wall of the display cavity is equipped with contacts at positions corresponding to the trigger terminals. The contacts are connected to the controller signal. When the side of the second magnet coated with the display color rotates away from the magnetic levitation cavity, the trigger terminal can just contact the contact. The contact can send a signal to the controller. When the four contacts send signals to the controller from top to bottom, the controller performs the following actions respectively: opening the drain pipe switch, closing the drain pipe switch, closing the control pump, and controlling the operation of the control pump.

[0019] The spraying device includes a spray pipe, a spray head, and a spray pump. The lower end of the spray pipe is connected to the limestone slurry layer, and the upper end extends to the middle of the desulfurization tower. The spray head is located at the upper end of the spray pipe, and the spray pump is connected to the spray pipe. The spray pump is used to pump the liquid from the limestone slurry layer to the spray head for spraying.

[0020] A demister is installed at the top of the desulfurization tower.

[0021] The magnetic levitation body is a plastic float with a first magnet inside.

[0022] The controller is a microcontroller.

[0023] An air outlet is provided at the top of the desulfurization tower.

[0024] The beneficial effects of this utility model are:

[0025] This invention incorporates a liquid level detection and pH detection structure in the desulfurization tower. Furthermore, it adds a saturated limestone slurry storage tower, a pump, a delivery pipe, and a drain pipe switch. When significant changes occur in the height and pH value of the saturated limestone slurry layer within the desulfurization tower, the pump and drain pipe switch maintain a suitable height and pH value for the saturated limestone slurry layer.

[0026] This invention further designs a liquid level detection device that can be linked with a controller. This device has a magnetic levitation body and a display magnetic rotor that can cooperate with each other. The display magnetic rotor can display the liquid level height and also has four trigger terminals. These four trigger terminals can trigger contacts, thereby causing the contacts to send control signals to the controller. The controller controls the opening and closing of the pump and the drain pipe switch according to the different trigger points, thereby realizing automated liquid level adjustment. Attached Figure Description

[0027] Figure 1This is a schematic diagram of a desulfurization tower liquid level detection and pH adjustment device in the deployed state.

[0028] Figure 2 This is a schematic diagram of the liquid level detection device;

[0029] Figure 3 yes Figure 2 Enlarged view of the A-section structure;

[0030] Figure 4 yes Figure 2 Enlarged view of the structure of section B;

[0031] Figure 5 This is a schematic diagram of the internal structure of the display cavity;

[0032] Figure 6 yes Figure 5 Enlarged view of the C-section structure.

[0033] The attached diagram is labeled as follows: 1. Desulfurization tower body; 11. Sulfur-containing gas input pipe; 12. Limestone slurry layer; 13. Spraying device; 13a. Spray head; 13b. Drain pipe; 14. Demister; 15. Liquid level detection device; 2. Magnetic levitation cavity; 21. Display cavity; 22. Contact point; 22a. Lower inlet pipe; 23. Upper inlet pipe; 24. Magnetic levitation body; 25. First magnet; 25a. Display magnetic rotor; 26. Second magnet; 26a. Torsion spring; 26b. Rotating shaft; 26c. Trigger end; 26d. pH meter; 3. Saturated limestone slurry storage tower; 4. Pump; 5. Delivery pipe; 6. Drain pipe switch; 7. Controller; 8. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0035] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0036] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments without conflict.

[0037] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms “a,” “an,” “an,” “the,” and similar words used in this application do not indicate quantity limitation and may indicate singular or plural. The terms “comprising,” “including,” “having,” and any variations thereof used in this application are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or device that includes a series of steps or units (elements) is not limited to the listed steps or units, but may also include steps or units not listed, or may include other steps or units inherent to these processes, methods, products, or devices. The terms “connected,” “linked,” “coupled,” and similar words used in this application are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The terms “multiple” / “several” used in this application refer to two or more. “And / or” describes the relationship between related objects, indicating that three relationships may exist; for example, “A and / or B” can indicate: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following objects are in an "or" relationship. The terms "first," "second," and "third" used in this application are merely to distinguish similar objects and do not represent a specific ordering of the objects.

[0038] like Figure 1 As shown, the desulfurization tower liquid level detection and pH adjustment device of this utility model mainly includes a desulfurization tower body 1, a liquid level detection device 2, a pH meter 3, a saturated limestone slurry storage tower 4, a pump 5, a delivery pipe 6, a drain pipe switch 7, and a controller 8. These components will be explained in detail below.

[0039] The main structure of the desulfurization tower 1 is based on existing technology, including a sulfur-containing gas input pipe 11, a spray device 13, a drain pipe 14, and a demister 15. The sulfur gas input pipe 11 is connected to the lower part of the desulfurization tower 1, located below the spray head 13a and above the limestone slurry layer 12. The gas input into the desulfurization tower 1 through the sulfur gas input pipe 11 is sulfur-containing gas. The spray device 13 includes a spray pipe, a spray head 13a, and a spray pump 13b. The lower end of the spray pipe is connected to the limestone slurry layer 12, and the upper end extends to the middle of the desulfurization tower 1. The spray head 13a is located at the upper end of the spray pipe, and the spray pump 13b is connected to the spray pipe. The spray pump 13b is used to pump the liquid from the limestone slurry layer 12 to the spray head 13a for spraying. The limestone slurry sprayed from the spray head 13a is used to react with the sulfur-containing gas. The specific reaction formula is as follows:

[0040] The resulting gypsum (CaSO4) is a non-volatile solid that can be separated and further processed.

[0041] The demister 15 separates and removes tiny droplets or aerosols from the gas, greatly reducing the sulfur content of the gas finally discharged from the desulfurization tower 1.

[0042] Throughout the reaction process, the pH value and liquid level of the limestone slurry layer 12 will change. Changes in liquid level directly affect the contact efficiency of the desulfurization liquid. Too low a liquid level may lead to insufficient desulfurization liquid, reducing the desulfurization effect; too high a level may cause overflow or impact, affecting the stability of the system. Changes in pH value will affect the reaction process. Generally, a pH value within a certain range (e.g., 6 to 8) is ideal to ensure effective removal of sulfur dioxide. If the pH value is too low, it may cause corrosion and equipment damage; if it is too high, it may affect the reaction efficiency. Therefore, this invention includes a liquid level detection device 2 and a pH value meter 3.

[0043] The desulfurization tower liquid level detection and pH adjustment device also includes a saturated limestone slurry storage tower 4, a pump 5, a delivery pipe 6, and a drain pipe switch 7. The saturated limestone slurry storage tower 4 contains saturated limestone slurry. One end of the delivery pipe 6 is connected to the saturated limestone slurry storage tower 4, and the other end is connected to the desulfurization tower body 1. The pump 5 is installed on the delivery pipe 6. The pump 5 can pump the saturated limestone slurry in the saturated limestone slurry storage tower 4 into the limestone slurry layer 12. The drain pipe switch 7 can open or close the drain pipe 14.

[0044] like Figure 2-6As shown, the liquid level detection device 2 includes a magnetic levitation cavity 21, a display cavity 22, a lower inlet pipe 23, an upper inlet pipe 24, a magnetic levitation body 25, and a display magnetic rotating body 26. The magnetic levitation cavity 21 is a vertical cavity. The lower inlet pipe 23 is horizontally arranged, with one end connected to the desulfurization tower body 1 and the other end connected to the lower end of the magnetic levitation cavity 21. The upper inlet pipe 24 is horizontally arranged, with one end connected to the desulfurization tower body 1 and the other end connected to the upper end of the magnetic levitation cavity 21. The height of the upper inlet pipe 24 is higher than the liquid surface of the limestone slurry layer 12, and the height of the lower inlet pipe 23 is lower than the liquid surface of the limestone slurry layer 12. The liquid in the limestone slurry layer 12 fills the magnetic levitation cavity 21, and the liquid level in the magnetic levitation cavity 21 is level with the height of the limestone slurry layer 12. The magnetic levitation body 25 floats on the liquid surface of the magnetic levitation cavity 21. A first magnet 25a is installed inside the magnetic levitation body 25. The display cavity 22 is a vertical cavity and is fixed to the magnetic levitation cavity 26. Beside the levitation cavity 21, the side of the display cavity 22 facing away from the levitation cavity 21 is transparent. There are 11 display magnetic rotating bodies 26, which are arranged vertically at equal intervals inside the display cavity 22. Each display magnetic rotating body 26 includes a second magnet 26a, which is rotatably disposed in the display cavity 22. The side of the second magnet 26a facing the levitation cavity 21 is painted red, while the side facing away from the levitation cavity 21 is unpainted. The display magnetic rotating body 26 also includes a torsion spring 26b. Rotating shafts 26c are fixed to the left and right ends of the second magnet 26a, respectively. The rotating shafts 26c are rotatably disposed in the display cavity 22. One end of the torsion spring 26b is fixedly connected to the inner wall of the display cavity 22, and the other end is fixedly connected to the second magnet 26a. The torsion spring 26b has the potential energy to rotate the red-painted side of the second magnet 26a to face the levitation cavity 21. The side of the first magnet 25a facing the display cavity 22 and the side of the second magnet 26a facing the magnetic levitation cavity 21 are magnetically repelled. The second magnet 26a, at the same height as the first magnet 25a, will rotate due to the repulsive force, causing its red-painted side to face away from the magnetic levitation cavity 21. At this time, when the operator observes the display cavity 22, the red side of one second magnet 26a at the same height as the liquid surface will face the display surface of the display cavity 22, while the colorless sides of the other second magnets 26a will face the display surface. The operator can directly distinguish the height of the limestone slurry layer 12. In a scheme without using the controller 8, the operator can control the pump 5 and the drain pipe switch 7 according to the height of the limestone slurry layer 12 to maintain the appropriate height. The pH meter 3 can detect the pH value of the limestone slurry layer 12, and the operator can control the pump 5 and the drain pipe switch 7 according to the pH value.

[0045] In the scheme using controller 8, four display magnetic rotors 26 are equipped with trigger heads 26d. Contacts 22a are located on the inner wall of the display cavity 22 at positions corresponding to the trigger heads 26d. Contacts 22a are connected to controller 8 via signals. When the red-painted side of the second magnet 26a rotates away from the magnetic levitation cavity 21, the trigger heads 26d contact contact 22a, which then sends a signal to controller 8. When the four contacts 22a send signals to controller 8 from top to bottom, controller 8 performs the following actions: opens drain pipe switch 7, closes drain pipe switch 7, shuts off control pump 5, and controls control pump 5 to operate. Controller 8 uses the "Advino Basic Edition," an open-source hardware platform based on the ATmega328P microcontroller.

[0046] The logic for manually adjusting the liquid level and pH value of limestone slurry layer 12 is the same as that for controller 8. The following explanation uses the logic of controller 8 for adjusting the liquid level and pH value:

[0047] When the pH meter 3 detects that the pH value is lower than 6, the pH meter 3 sends a signal to the controller 8. The controller 8 opens the drain pipe switch 7 to discharge part of the limestone slurry, then closes the drain pipe switch 7, and turns on the pump 5 to inject saturated limestone slurry with a pH value between 7.5 and 10 into the limestone slurry layer 12 until the liquid level of the limestone slurry layer 12 reaches the predetermined value.

[0048] The method for adjusting the liquid level is as follows: four contacts 22a are designated as upper contact, middle 1 contact, middle 2 contact, and lower contact from top to bottom. The upper and lower contacts represent the highest and lowest permissible liquid levels of the limestone slurry layer 12, respectively. The middle 1 and middle 2 contacts represent the liquid levels after drainage and after replenishment, respectively. When the upper contact is triggered, the controller 8 opens the drain pipe switch 7 to drain part of the limestone slurry. The process stops when the middle 1 contact is triggered. When the lower contact is triggered, the controller 8 opens the pump 5 to inject saturated limestone slurry into the limestone slurry layer 12. The process stops when the middle 2 contact is triggered.

[0049] The above are merely preferred embodiments of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should be considered within its protection scope.

Claims

1. A desulfurization tower liquid level detection and pH value adjusting device, comprising a desulfurization tower body (1), the desulfurization tower body (1) is connected with a sulfur-containing gas input pipe (11), the bottom of the desulfurization tower body (1) is provided with a limestone slurry layer (12), and the middle part is provided with a spraying device (13), the spraying device (13) can extract limestone slurry from the limestone slurry layer (12) to spray the sulfur-containing gas input pipe (11) to input the sulfur-containing gas in the desulfurization tower body (1), characterized in that: The desulfurization tower body (1) is connected with a liquid discharge pipe (14), a liquid level detection device (2) and a PH value detection meter (3), the liquid discharge pipe (14) communicates with the limestone slurry layer (12) and can discharge the liquid of the limestone slurry layer (12), the liquid level detection device (2) and the PH value detection meter (3) are installed on the desulfurization tower body (1), the liquid level detection device (2) can detect the liquid level height of the limestone slurry layer (12), the PH value detection meter (3) can detect the PH value of the limestone slurry layer (12), the desulfurization tower liquid level detection and PH value adjusting device further comprises a saturated limestone slurry storage tower (4), a pump (5), a liquid delivery pipe (6) and a liquid discharge pipe switch (7), the saturated limestone slurry storage tower (4) stores saturated limestone slurry, one end of the liquid delivery pipe (6) is connected with the saturated limestone slurry storage tower (4) and the other end is connected with the desulfurization tower body (1), the pump (5) is installed on the liquid delivery pipe (6), the pump (5) can pump the saturated limestone slurry in the saturated limestone slurry storage tower (4) into the limestone slurry layer (12), and the liquid discharge pipe switch (7) can open or close the liquid discharge pipe (14). ​ 2. The desulfurization tower liquid level detection and pH value adjusting device according to claim 1, characterized in that: The controller (8) can receive the signals of the liquid level detection device (2) and the PH value detection meter (3) and control the operation of the pump (5) and the opening and closing of the liquid discharge pipe switch (7).

3. The device for detecting liquid level and adjusting PH value of a desulfurization tower according to claim 2, characterized in that: The liquid level detection device (2) comprises a magnetic floating cavity (21), a display cavity (22), a lower access pipe (23), an upper access pipe (24), a magnetic floating body (25) and a display magnetic rotating body (26). The magnetic floating cavity (21) is a vertical cavity. The lower access pipe (23) is horizontally arranged, one end of which is connected to the desulfurization tower body (1), and the other end is connected to the lower end of the magnetic floating cavity (21). The upper access pipe (24) is horizontally arranged, one end of which is connected to the desulfurization tower body (1), and the other end is connected to the upper end of the magnetic floating cavity (21). The height of the upper access pipe (24) is higher than the liquid level of the limestone slurry layer (12), and the height of the lower access pipe (23) is lower than the liquid level of the limestone slurry layer (12). The liquid in the limestone slurry layer (12) fills the magnetic floating cavity (21), and the height of the liquid in the magnetic floating cavity (21) is flush with the height of the limestone slurry layer (12). The magnetic floating body (25) floats on the surface of the liquid in the magnetic floating cavity (21), and the first magnet (25a) is arranged in the magnetic floating body (25). The display cavity (22) is a vertical cavity, which is fixed beside the magnetic floating cavity (21). The side of the display cavity (22) away from the magnetic floating cavity (21) is transparent. The number of display magnetic rotating bodies (26) is several, which are vertically and equally spaced in the display cavity (22). The display magnetic rotating body (26) comprises a second magnet (26a), which is rotatably arranged in the display cavity (22). The side of the second magnet (26a) facing the magnetic floating cavity (21) is coated with a display color, and the side of the second magnet (26a) away from the magnetic floating cavity (21) is not coated. The side of the first magnet (25a) facing the display cavity (22) is magnetically repelled from the side of the second magnet (26a) facing the magnetic floating cavity (21). The second magnet (26a) at the same height as the first magnet (25a) will rotate due to the repulsive force of the first magnet (25a), so that the side of the second magnet (26a) coated with the display color is away from the magnetic floating cavity (21).

4. The desulfurization tower liquid level detection and pH value adjusting device according to claim 3, characterized in that: The display magnetic rotating body (26) further comprises a torsion spring (26b). The left and right ends of the second magnet (26a) are respectively fixed with rotating shafts (26c), which are rotatably arranged in the display cavity (22). One end of the torsion spring (26b) is fixedly connected with the inner wall of the display cavity (22), and the other end is fixedly connected with the second magnet (26a). The torsion spring (26b) has potential energy to rotate the side of the second magnet (26a) coated with the display color to face the magnetic floating cavity (21).

5. The desulfurization tower liquid level detection and pH value adjusting device according to claim 4, characterized in that: The display magnetic rotor (26) is more than four, four display magnetic rotors (26) are provided with trigger end (26d), the inner wall of the display cavity (22) is provided with contact (22a) at the position corresponding to the trigger end (26d), the contact (22a) is signal connected with the controller (8), when the second magnet (26a) rotates to the side away from the magnetic suspension cavity (21) coated with display color, the trigger end (26d) can contact the contact (22a), the contact (22a) can send a signal to the controller (8), when four contacts (22a) send signals to the controller (8) from top to bottom, the actions of the controller (8) are opening the drain pipe switch (7), closing the drain pipe switch (7), closing the control pump (5) and controlling the operation of the control pump (5) respectively.

6. The desulfurization tower liquid level detection and pH value adjusting device according to claim 1, characterized in that: The spraying device (13) comprises a spraying pipe, a spraying head (13a) and a spraying pump (13b), the lower end of the spraying pipe is connected to the limestone slurry layer (12), the upper end of the spraying pipe extends to the middle of the desulfurization tower body (1), the spraying head (13a) is located at the upper end of the spraying pipe, the spraying pump (13b) is connected to the spraying pipe, and the spraying pump (13b) is used for pumping the liquid of the limestone slurry layer (12) to the spraying head (13a) to spray out.

7. The desulfurization tower liquid level detection and pH value adjusting device according to claim 1, characterized in that: The upper part of the desulfurization tower body (1) is provided with a demister (15).

8. The device for detecting liquid level and adjusting PH value of a desulfurization tower according to claim 5, characterized in that: The magnetic floating body (25) is a plastic float provided with a first magnet (25a) inside.

9. The device for detecting liquid level and adjusting PH value of a desulfurization tower according to claim 2, characterized in that: The controller (8) is a single-chip microcomputer.

10. The desulfurization tower liquid level detection and pH value adjusting device according to claim 1, characterized in that: The top of the desulfurization tower body (1) is provided with an air outlet.

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