Waste gas desulfurization device

Abstract

The utility model provides a waste gas desulfurization device which comprises an ammonia storage tank, a desulfurization box, an ammonia inlet pipe and a return pipe, an ammonia concentration detector is arranged on the ammonia storage tank and used for detecting the ammonia concentration at the bottom of the ammonia storage tank, the ammonia inlet pipe is communicated with the bottom of the ammonia storage tank and the top of the desulfurization box, and the return pipe is communicated with the bottom of the desulfurization box and the top of the ammonia storage tank. According to the technical scheme, the ammonia water circulating flow path is established between the ammonia storage tank and the desulfurization box through the ammonia inlet pipe and the return pipe, the reacted ammonia water is mixed with the original ammonia water in the process of flowing from the top of the ammonia storage tank to the bottom of the ammonia storage tank and then enters the desulfurization box again, and the ammonia water concentration at the bottom of the ammonia storage tank is detected through the ammonia water concentration detector; on the premise of ensuring the desulfurization efficiency, the utilization rate of ammonia water is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of waste gas treatment, and particularly to a waste gas desulfurization device. Background Art

[0002] A large amount of gas is generated during the coal combustion process. Since sulfur elements are contained in coal, products such as sulfur dioxide formed during combustion will cause air pollution. The gas generated from coal combustion needs to be desulfurized before being discharged. At present, the general process is mostly to use the method of ammonia water contact reaction for treatment. This technology uses ammonia water with an appropriate concentration as an absorbent to absorb sulfides in the waste gas.

[0003] Among them, the existing patent document CN 108771967 A discloses a process for wet ultra-clean treatment of flue gas with integrated desulfurization, denitrification and dust removal, including a desulfurization and denitrification reactor. A reflux pipe connected to the ammonia water inlet pipe is arranged at the bottom of the reactor, so that ammonia water can circulate in the reactor to improve the utilization efficiency of ammonia water.

[0004] However, the concentration of ammonia water will decrease after being recycled. When the concentration of ammonia water is too low and not discharged, the efficiency of the desulfurization reaction will be affected. When the concentration of ammonia water is discharged at a relatively high level, it will cause waste of ammonia water. Summary of the Utility Model

[0005] One technical problem to be solved by the present disclosure is: how to make full use of ammonia water on the premise of ensuring the desulfurization efficiency.

[0006] To solve the above technical problem, an embodiment of the present disclosure provides a waste gas desulfurization device, including: an ammonia storage tank, a desulfurization tank, an ammonia inlet pipe and a reflux pipe. An ammonia water concentration detector is arranged on the ammonia storage tank, and the ammonia water concentration detector is used to detect the ammonia water concentration at the bottom of the ammonia storage tank. The ammonia inlet pipe communicates with the bottom of the ammonia storage tank and the top of the desulfurization tank, and the reflux pipe communicates with the bottom of the desulfurization tank and the top of the ammonia storage tank, so as to form an ammonia water circulation path between the ammonia storage tank and the desulfurization tank.

[0007] In some embodiments, the waste gas desulfurization device includes an inlet pipe connected to the lower part of the desulfurization tank and an exhaust pipe connected to the upper part of the desulfurization tank.

[0008] In some embodiments, a gas distribution pipe connected to the inlet pipe is arranged inside the desulfurization tank, and a plurality of gas distribution holes are distributed on the gas distribution pipe.

[0009] In some embodiments, an air extraction pump is arranged on the inlet pipe.

[0010] In some embodiments, a spraying assembly is arranged on the top of the desulfurization tank. The spraying assembly includes a spraying main pipe connected to the ammonia inlet pipe and a plurality of spray heads arranged on the spraying main pipe.

[0011] In some embodiments, a liquid filling port and a liquid discharging port are provided on the ammonia storage tank.

[0012] In some embodiments, a stirring assembly is provided inside the ammonia storage tank, and a driving member drivingly connected to the stirring assembly is further provided on the ammonia storage tank.

[0013] In some embodiments, the stirring assembly includes a main rod drivingly connected to the driving member and a plurality of support rods distributed on the main rod along the length direction of the main rod.

[0014] In some embodiments, the stirring assembly includes a main rod drivingly connected to the driving member and stirring paddle blades arranged on the main rod along the length direction of the main rod.

[0015] In some embodiments, the waste gas desulfurization device includes a first ammonia water pump and a second ammonia water pump. The first ammonia water pump is provided on the ammonia inlet pipe, and the second ammonia water pump is provided on the reflux pipe.

[0016] Through the above technical solution, the waste gas desulfurization device provided by the present disclosure establishes an ammonia water circulation flow path between the ammonia storage tank and the desulfurization tank through the ammonia inlet pipe and the reflux pipe. The reacted ammonia water flows from the top to the bottom of the ammonia storage tank and mixes with the original ammonia water and then re-enters the desulfurization tank, and the ammonia water concentration detector detects the ammonia water concentration at the bottom of the ammonia storage tank, thereby improving the utilization rate of ammonia water on the premise of ensuring the desulfurization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 is a schematic structural diagram of the waste gas desulfurization device disclosed in the embodiments of the present disclosure Figure 1 ;

[0019] Figure 2 is a schematic structural diagram of the waste gas desulfurization device disclosed in the embodiments of the present disclosure Figure 2 ;

[0020] Figure 3 is a partial cross-sectional schematic diagram showing the internal structure of the desulfurization tank of the waste gas desulfurization device disclosed in the embodiments of the present disclosure;

[0021] Figure 4 is a cross-sectional schematic diagram of the ammonia storage tank provided with support rods disclosed in the embodiments of the present disclosure;

[0022] Figure 5 is a cross-sectional schematic diagram of the ammonia storage tank provided with stirring paddle blades disclosed in the embodiments of the present disclosure;

[0023] Figure 6 A cross-sectional schematic view of the support rod disclosed in the embodiments of the present disclosure.

[0024] Description of the reference numerals:

[0025] 1. Ammonia storage tank; 101. Liquid filling port; 102. Drain port; 103. Stirring assembly; 1031. Main rod; 1032. Support rod; 1033. Activated carbon coating; 1034. Stirring paddle; 104. Driving member; 105. Sealing cover; 106. Drain pipe; 107. Control valve; 2. Desulfurization tank; 201. Intake pipe; 202. Exhaust pipe; 203. Air distribution pipe; 204. Air distribution holes; 205. Spraying assembly; 2051. Spraying main pipe; 2052. Spraying head; 206. Air extraction pump; 3. Ammonia inlet pipe; 301. First ammonia water pump; 4. Return pipe; 401. Second ammonia water pump; 5. Ammonia water concentration detector; 501. Concentration display screen; 502. Detection probe; 6. Base. Detailed implementation manners

[0026] The following further describes in detail the implementation manners of the present disclosure in conjunction with the accompanying drawings and embodiments. The detailed descriptions and accompanying drawings of the following embodiments are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms, not limited to the specific embodiments disclosed herein, but including all technical solutions falling within the scope of the claims.

[0027] The present disclosure provides these embodiments to make the present disclosure thorough and complete, and to fully express the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of the components and steps, the components of the materials, the numerical expressions and numerical values described in these embodiments should be interpreted as merely exemplary, rather than as limitations.

[0028] It should be noted that in the description of the present disclosure, unless otherwise specified, "a plurality of" means greater than or equal to two; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present disclosure. When the absolute position of the described object changes, the relative position relationship may also change accordingly.

[0029] In addition, the "first", "second" and similar terms used in this disclosure do not denote any order, quantity or importance, but are merely used to distinguish different parts. "Vertical" does not mean strictly vertical, but within the allowable error range. "Parallel" does not mean strictly parallel, but within the allowable error range. Words such as "including" or "comprising" mean that the elements before this word cover the elements listed after this word, and do not exclude the possibility of also covering other elements.

[0030] It should also be noted that in the description of this disclosure, unless otherwise clearly specified and limited, the terms "installed", "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0031] All terms used in this disclosure have the same meanings as understood by those of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, for example, should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0032] Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods and devices should be regarded as part of the specification.

[0033] As Figures 1 to 3 shown, this disclosure provides an exhaust gas desulfurization device, including an ammonia storage tank 1, a desulfurization tank 2, an ammonia inlet pipe 3 and a reflux pipe 4. An ammonia water concentration detector 5 is provided on the ammonia storage tank 1. Among them, the ammonia water concentration detector 5 is used to detect the ammonia water concentration at the bottom of the ammonia storage tank 1. The ammonia inlet pipe 3 connects the bottom of the ammonia storage tank 1 and the top of the desulfurization tank 2, and the reflux pipe 4 connects the bottom of the desulfurization tank 2 and the top of the ammonia storage tank 1, so as to form an ammonia water circulation flow path between the ammonia storage tank 1 and the desulfurization tank 2.

[0034] Specifically, the ammonia water at the bottom of the ammonia storage tank 1 is transported to the top of the desulfurization tank 2 through the ammonia inlet pipe 3. After the ammonia water reacts with the waste gas in the desulfurization tank 2 for desulfurization, it flows to the bottom of the desulfurization tank 2 and is transported to the top of the ammonia storage tank 1 through the reflux pipe 4. During the process of the reacted ammonia water with lower concentration flowing from the top to the bottom of the ammonia storage tank 1, it is mixed with the original ammonia water with higher concentration in the ammonia storage tank 1, and then enters the desulfurization tank 2 through the ammonia inlet pipe 3, forming a circulating flow path of the ammonia water. An ammonia water concentration detector 5 is provided at the bottom of the ammonia storage tank 1 to detect the concentration of the ammonia water before it enters the ammonia inlet pipe 3, ensuring that the concentration of the ammonia water entering the desulfurization tank 2 is higher than the minimum concentration required for the desulfurization reaction, so as to ensure the normal progress of the desulfurization reaction.

[0035] As Figure 1 shown, in some embodiments, considering that the volume of the ammonia storage tank 1 is usually smaller than that of the desulfurization tank 2, for the convenience of device placement, the ammonia storage tank 1 is placed above the desulfurization tank 2, and the desulfurization tank 2 is arranged on the base 6. In other embodiments, when the installation space is limited, on the premise that the interfaces of the ammonia inlet pipe 3 and the reflux pipe 4 are respectively installed at the corresponding positions, the ammonia storage tank 1 and the desulfurization tank 2 can be placed side by side or in other flexible placement forms to adapt to different installation spaces, so that the device can be more flexibly applied to various working conditions.

[0036] As Figure 4 and Figure 5 shown, in some embodiments, the ammonia water concentration detector 5 includes a concentration display screen 501 and a detection probe 502. For the convenience of staff observation, the concentration display screen 501 is arranged on the top surface of the ammonia storage tank 1. Of course, it can also be arranged on the side surface of the ammonia storage tank 1 or other positions convenient for observation according to the actual situation on site. The end of the detection probe 502 for detecting the concentration is located at the bottom of the ammonia storage tank 1, and is used to detect the concentration of the ammonia water before it enters the ammonia inlet pipe 3 to ensure the reaction efficiency.

[0037] As Figure 1 、 Figure 2 and Figure 3 shown, in some embodiments, the waste gas desulfurization device includes an inlet pipe 201 connected to the lower part of the desulfurization tank 2 and an exhaust pipe 202 connected to the upper part of the desulfurization tank 2.

[0038] Specifically, the waste gas containing sulfides enters the lower part of the desulfurization tank 2 through the inlet pipe 201, and is discharged through the exhaust pipe 202 located at the upper part of the desulfurization tank 2 after the desulfurization reaction is completed. During the process of the desulfurization reaction, the waste gas moves from the lower part of the desulfurization tank 2 to its upper part, and the ammonia water discharged from the ammonia inlet pipe 3 moves from the top of the desulfurization tank 2 to its bottom. By using the countercurrent method, the sulfides in the waste gas can be more fully absorbed by the ammonia water, improving the efficiency of the desulfurization reaction.

[0039] As Figure 3As shown, in some embodiments, a gas distribution pipe 203 communicating with the intake pipe 201 is provided inside the desulfurization tank 2, and a plurality of gas distribution holes 204 are distributed on the gas distribution pipe 203.

[0040] Specifically, the gas distribution pipe 203 is located at the bottom of the desulfurization tank 2. The waste gas containing sulfides is discharged into the gas distribution pipe 203 at the bottom of the desulfurization tank 2 through the intake pipe 201, and is evenly discharged into the desulfurization tank 2 through the plurality of gas distribution holes 204 distributed on the gas distribution pipe 203, so that the waste gas entering the desulfurization tank 2 is evenly dispersed at its bottom, which is beneficial to the progress of the desulfurization reaction.

[0041] As Figure 3 shown, in some embodiments, the gas distribution pipe 203 extends straight, its first end communicates with the intake pipe 201 and is fixed to one inner wall of the desulfurization tank 2, and the second end is fixed to the opposite inner wall of the desulfurization tank 2, so that the waste gas can be effectively distributed at the bottom of the desulfurization tank 2, facilitating the desulfurization reaction. In other embodiments, the gas distribution pipe 203 can also be bent and laid at the bottom of the desulfurization tank 2, so that the waste gas can be more dispersed and discharged into the desulfurization tank 2.

[0042] As Figure 1 、 Figure 2 and Figure 3 shown, in some embodiments, an air extraction pump 206 is provided on the intake pipe 201. In order to improve the utilization rate of ammonia water in the desulfurization reaction and prevent the waste gas entering the inside of the desulfurization tank 2 from flowing back, an air extraction pump 206 is provided on the intake pipe 201. Specifically, when the ammonia water concentration detector 5 detects that the ammonia water concentration at the bottom of the ammonia storage tank 1 is at a relatively high level, the power of the air extraction pump 206 can be increased to increase the amount of waste gas entering the desulfurization tank 2 and improve the desulfurization efficiency. When the ammonia water concentration detector 5 detects that the ammonia water concentration at the bottom of the ammonia storage tank 1 is at a relatively low level, the power of the air extraction pump 206 is appropriately reduced, and the desulfurization reaction is carried out while ensuring that the sulfides can be fully absorbed, avoiding the emission of sulfides caused by insufficient reaction and environmental pollution. When the ammonia water concentration detector 5 detects that the ammonia water concentration at the bottom of the ammonia storage tank 1 is insufficient, the air extraction pump 206 is turned off and the ammonia water in the ammonia storage tank 1 is replaced to prevent the waste gas in the desulfurization tank 2 from flowing back, effectively improving the utilization rate of ammonia water and the stability of the device.

[0043] As Figure 3 shown, a spraying assembly 205 is provided at the top of the desulfurization tank 2. The spraying assembly includes a spraying main pipe 2051 communicating with the ammonia inlet pipe 3 and a plurality of spray heads 2052 provided on the spraying main pipe 2051.

[0044] Specifically, in order to improve the efficiency of the desulfurization reaction, a spray assembly 205 consisting of a spray main pipe 2051 and a plurality of spray heads 2052 is provided on the top of the desulfurization box 2. The ammonia water at the bottom of the ammonia storage tank 1 is transported to the spray main pipe 2051 located at the top of the desulfurization box 2 by the ammonia inlet pipe 3, and then sprayed into the interior of the desulfurization box 2 by the plurality of spray heads 2052. Under the action of the spray assembly 205, the ammonia water is dispersed at the top of the desulfurization box 2, and a countercurrent absorption method is adopted between the ammonia water and the exhaust gas dispersed by the gas distribution pipe 203 at the bottom of the desulfurization box 2, thereby effectively increasing the contact area of ​​the desulfurization reaction, so that the sulfide in the exhaust gas can be fully absorbed by the ammonia water.

[0045] like Figures 1 - 5 As shown, in some embodiments, the ammonia storage tank 1 is provided with a filling port 101 and a drain port 102. Specifically, when the ammonia concentration detector 5 detects that the ammonia concentration in the ammonia storage tank 1 is insufficient, the ammonia in the ammonia storage tank 1 is replaced through the filling port 101 and the drain port 102. For ease of operation, the filling port 101 is arranged on the top surface of the ammonia storage tank 1, and a sealing cover 105 is provided at the filling port 101. The drain port 102 is arranged at the bottom of the ammonia storage tank 1. For the recovery of ammonia with insufficient concentration, a drain pipe 106 is connected to the drain port 102, and a control valve 107 is provided at the end of the drain pipe 106 away from the ammonia storage tank 1, so as to facilitate the staff to perform draining operations.

[0046] like Figures 1 - 5 As shown, in some embodiments, a stirring assembly 103 is provided in the ammonia storage tank 1 , and a driving member 104 which is transmission-connected to the stirring assembly 103 is also provided on the ammonia storage tank 1 .

[0047] Specifically, in order to prevent the low-concentration ammonia water from being insufficiently mixed with the original high-concentration ammonia water during the movement from the top to the bottom of the ammonia storage tank 1 after the desulfurization reaction, resulting in inaccurate detection results of the ammonia concentration detector 5, a stirring assembly 103 is provided inside the ammonia storage tank 1, and the stirring assembly 103 is driven by the driving member 104 to stir the ammonia water, so that the ammonia water refluxed into the ammonia storage tank 1 is fully mixed with the original ammonia water, avoiding errors in the detection results, and effectively improving the utilization rate of the ammonia water. The driving member 104 here can be a conventional driving member such as a driving motor, a cylinder or an oil cylinder.

[0048] like Figure 4 As shown, in some embodiments, the stirring assembly 103 includes a main rod 1031 that is transmission-connected to the driving member 104 and a plurality of supporting rods 1032 distributed on the main rod 1031 along the length direction of the main rod 1031. Specifically, the main rod 1031 is arranged on the central axis of the ammonia storage tank 1 along the height direction, and driven by the driving member 104, the plurality of symmetrically arranged supporting rods 1032 are driven to rotate, so that the ammonia water with a lower concentration after the reaction and the ammonia water with a higher concentration originally in the ammonia storage tank 1 can be evenly mixed, thereby avoiding deviation in the detection result of the ammonia concentration detector 5.

[0049] As Figure 5 shown, in some embodiments, the stirring assembly 103 includes a main rod 1031 drivingly connected to the driving member 104 and stirring blades 1034 arranged along the length direction of the main rod 1031. Specifically, the stirring blades 1034 have inclined slopes. When the driving member 104 drives the stirring assembly 103 to rotate, the stirring blades 1034 can push the ammonia water upward, so that the ammonia water is fully mixed under the action of gravity and the pushing of the blades, avoiding deviation in the detection results of the ammonia water concentration detector 5.

[0050] As Figure 6 shown, in some embodiments, an activated carbon coating 1033 is provided on the surface of the support rod 1032, and the same coating can also be provided on the surfaces of the main rod 1031 and the stirring blades 1034, so that the stirring assembly 103 can continuously adsorb fine particles in the ammonia water after the desulfurization reaction during the stirring process, playing a role of continuous purification. In other embodiments, an ion exchange resin coating can also be provided on the surface of the stirring assembly 103.

[0051] In other embodiments, the driving member 104 can also drive the stirring assembly 103 to move in a swinging or up-and-down movement manner, so that the ammonia water inside the ammonia storage tank 1 can be fully mixed.

[0052] As Figure 1 、 Figure 2 and Figure 3 shown, in some embodiments, the waste gas desulfurization device includes a first ammonia water pump 301 and a second ammonia water pump 401. The first ammonia water pump 301 is provided on the ammonia inlet pipe 3, and the second ammonia water pump 401 is provided on the reflux pipe 4.

[0053] Specifically, the ammonia water at the bottom of the ammonia storage tank 1 is driven by the first ammonia water pump 301, passes through the ammonia inlet pipe 3, enters the spray main pipe 2051 at the top of the desulfurization tank 2, and then is dispersed at the top of the desulfurization tank 2 through a plurality of spray nozzles 2052. At the same time, under the action of the air extraction pump 206, the waste gas enters the air distribution pipe 203 at the bottom of the desulfurization tank 2 through the inlet pipe 201, and is dispersed at the bottom of the desulfurization tank 2 through a plurality of air distribution holes 204 distributed on the surface of the air distribution pipe 203. The dispersed ammonia water and waste gas absorb each other countercurrently inside the desulfurization tank 2. The gas after the desulfurization reaction is discharged through the exhaust pipe 202 at the top of the desulfurization tank 2. The ammonia water after the desulfurization reaction reaches the bottom of the desulfurization tank 2, and under the action of the second ammonia water pump 401, returns to the top of the ammonia storage tank 1 through the reflux pipe 4. Under the action of the stirring assembly 103, it is mixed with the ammonia water in the ammonia storage tank 1 and after being detected as qualified by the ammonia water concentration detector 5, it re-enters the desulfurization tank 2 to complete the ammonia water circulation path. When the ammonia water concentration detector 5 detects that the concentration of the mixed ammonia water at the bottom of the ammonia storage tank 1 is lower than the requirement of the desulfurization reaction, the staff replaces the ammonia water in the ammonia storage tank 1 through the liquid addition port 101 and the liquid discharge port 102 to ensure that the desulfurization reaction can proceed normally.

[0054] In other embodiments, the first ammonia water pump 301 and the second ammonia water pump 401 can also be respectively arranged at the bottom of the ammonia storage tank 1 and the bottom of the desulfurization tank 2 and communicated with the ammonia inlet pipe 3 and the reflux pipe 4 respectively, and the ammonia water circulation path can also be established.

[0055] So far, the embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed here based on the above description.

[0056] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way.

Claims

1. An exhaust gas desulfurization device, characterized in that, Including: An ammonia storage tank (1), a desulfurization tank (2), an ammonia inlet pipe (3), and a reflux pipe (4). An ammonia water concentration detector (5) is provided on the ammonia storage tank (1). Among them, the ammonia water concentration detector (5) is used to detect the ammonia water concentration at the bottom of the ammonia storage tank (1). The ammonia inlet pipe (3) connects the bottom of the ammonia storage tank (1) and the top of the desulfurization tank (2), and the reflux pipe (4) connects the bottom of the desulfurization tank (2) and the top of the ammonia storage tank (1), thereby forming an ammonia water circulation flow path between the ammonia storage tank (1) and the desulfurization tank (2).

2. The flue gas desulfurization device according to claim 1, wherein, The waste gas desulfurization device includes an inlet pipe (201) connected to the lower part of the desulfurization tank (2) and an exhaust pipe (202) connected to the upper part of the desulfurization tank (2).

3. The flue gas desulfurization device according to claim 2, characterized in that, A gas distribution pipe (203) connected to the inlet pipe (201) is provided inside the desulfurization tank (2), and a plurality of gas distribution holes (204) are distributed on the gas distribution pipe (203).

4. The flue gas desulfurization device according to claim 2, characterized in that An air extraction pump (206) is provided on the inlet pipe (201).

5. The flue gas desulfurization device according to claim 1, characterized in that A spray assembly (205) is provided on the top of the desulfurization tank (2). The spray assembly includes a spray main pipe (2051) connected to the ammonia inlet pipe (3) and a plurality of spray heads (2052) provided on the spray main pipe (2051).

6. The flue gas desulfurization device according to claim 1, wherein, A liquid addition port (101) and a liquid discharge port (102) are provided on the ammonia storage tank (1).

7. The flue gas desulfurization device according to claim 1, characterized in that, A stirring assembly (103) is provided inside the ammonia storage tank (1), and a driving member (104) is also provided on the ammonia storage tank (1) and is drivingly connected to the stirring assembly (103).

8. The flue gas desulfurization device according to claim 7, wherein, The stirring assembly (103) includes a main rod (1031) drivingly connected to the driving member (104) and a plurality of support rods (1032) distributed on the main rod (1031) along the length direction of the main rod (1031).

9. The flue gas desulfurization device according to claim 7, wherein The stirring assembly (103) includes a main rod (1031) drivingly connected to the driving member (104) and stirring blades (1034) provided on the main rod (1031) along the length direction of the main rod (1031).

10. The flue gas desulfurization device according to claim 1, characterized in that, The waste gas desulfurization device includes a first ammonia water pump (301) and a second ammonia water pump (401). The first ammonia water pump (301) is provided on the ammonia inlet pipe (3), and the second ammonia water pump (401) is provided on the reflux pipe (4).

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