Automatic ammonia preparing and dosing device

Abstract

The utility model belongs to the technical field of ammonia and medicine adding devices, and particularly relates to an automatic ammonia preparing and medicine adding device which comprises an equipment main body consisting of a total mixing tank, a primary mixing tank, a first supporting table and a second supporting table, an ammonia adding assembly, a water adding assembly, a conveying assembly and a stirring assembly. The two primary mixing tanks are arranged to achieve primary pH value blending of boiler water, then the boiler water is conveyed into the total mixing tank to be subjected to secondary pH value blending, in the process, the primary mixing tanks can be used for boiler water adding and ammonia water adding operation, and compared with a single tank body blending mode, the operation efficiency is greatly improved. According to the device, the stirring assembly is arranged, the waiting time in the two adjacent blending processes is effectively shortened, the blending efficiency is improved, meanwhile, full mixing of ammonia water and boiler water can be achieved through the arrangement of the stirring assembly, and through operation of the stirring mechanism in four modes, energy consumption in the operation process is lower, and the effect of saving energy is achieved.

Description

Technical field:

[0001] The utility model relates to the technical field of ammonia dosing devices, in particular to an automatic ammonia dosing device. Background technology:

[0002] The ammonia dosing device is used to automatically adjust the pH value of boiler feed water, so that the pH value of boiler feed water is maintained within a certain range and operates in the best state, thereby preventing acid-base corrosion of boilers and other thermal equipment caused by pH imbalance of feed water, making the thermal system work in the best state, extending the service life of thermal equipment, and ensuring long-term stable and safe operation of thermal equipment.

[0003] In actual use, it is necessary to decide based on the pH value of the boiler water. After the pH value of the boiler water is lower than 9, the ammonia adding equipment starts to add ammonia water to the boiler water. However, the ammonia water is added little by little, and whether to continue adding ammonia water is determined based on the feedback pH value. The entire ammonia adding process is long and inefficient. Based on this, an automatic ammonia dosing device is provided. Utility model content:

[0004] The purpose of the utility model is to provide an automatic ammonia dosing device to solve the problems in the above background in view of the defects of the prior art.

[0005] An automatic ammonia dosing device comprises an equipment body composed of a total mixing tank, a primary mixing tank, a first support platform, and a second support platform, wherein the total mixing tank, the primary mixing tank, the first support platform, and the second support platform are arranged in sequence from bottom to top in the vertical direction, two primary mixing tanks are provided and symmetrically fixed on the top of the total mixing tank, an ammonia adding component and a water adding component are arranged on the top of the two primary mixing tanks, and the water adding component extends to the interior of the total mixing tank, and a conveying component is arranged between the two primary mixing tanks and the total mixing tank, and a stirring component extending to the interior of the total mixing tank and the primary mixing tank is arranged on the top of the total mixing tank, the primary mixing tank, the first support platform, and the second support platform;

[0006] The water adding component is used to realize the addition of boiler water to the two primary mixing tanks, the ammonia adding component is used to realize the quantitative addition of ammonia water to the main mixing tank and the primary mixing tank, and the conveying component is used to convey the boiler water initially blended in the two primary mixing tanks to the main mixing tank;

[0007] The stirring assembly is used to achieve stirring and mixing of the solutions inside the two primary mixing tanks and the total mixing tank.

[0008] By adopting the above technical solution, the waiting time for boiler water blending can be effectively reduced, and the efficiency of boiler water pH blending can be further improved.

[0009] The ammonia adding component comprises a first dosing pipe, a four-way valve, and a second dosing pipe;

[0010] The first dosing pipe is connected to the output end of the dosing pump and the input end of the four-way valve, and the second dosing pipe is respectively connected to the three output ends of the four-way valve and extends to the interior of the main mixing tank and the two primary mixing tanks respectively;

[0011] The water adding assembly comprises a first water adding pipe, a first three-way valve, and a second water adding pipe;

[0012] The first water supply pipe is connected to the input end of the first three-way valve, and the second water supply pipe is respectively connected to the two output ends of the first three-way valve and extends to the inside of the two primary mixing tanks respectively;

[0013] The delivery assembly includes a second three-way valve, a discharge pipe, and a delivery pump;

[0014] The input end of the delivery pump is connected to the output end of the second three-way valve through a pipeline, and the output end of the delivery pump is connected to the inner cavity of the main mixing tank through a pipeline;

[0015] The liquid discharge pipe is connected to two input ends of the second three-way valve and is communicated with the two initial mixing tanks.

[0016] By adopting the above technical solution, the boiler water preliminarily blended in the two primary mixing tanks can be transported to the main mixing tank.

[0017] The stirring assembly comprises a first stirring unit, a second stirring unit, a third stirring unit, a driving motor, a main gear, a docking sleeve and a linkage switching unit.

[0018] By adopting the above technical solution, the stirring assembly can achieve full stirring of the solutions inside the two primary mixing tanks and the total mixing tank, thereby achieving full and efficient mixing of ammonia water and boiler water, further improving the blending efficiency of the boiler water HP value.

[0019] The linkage switching unit includes an electric push rod, a lifting seat, an L-shaped lifting rod, a connecting plate, a lifting shaft, a first transmission gear and a second transmission gear.

[0020] By adopting the above technical solution, the stirring component can be operated in four different modes through the linkage switching unit.

[0021] The inner cavity of the docking sleeve is formed with a docking tooth cavity matching the outer wall of the docking tooth block, and the inner side of the lifting cylinder is formed with a limiting groove for the limiting guide block to limit and slide.

[0022] By adopting the above technical solution, after the lifting cylinder is raised so that the docking tooth block is docked with the docking sleeve, the rotation of the docking sleeve can be transmitted to the first stirring shaft.

[0023] The upward stroke of the electric push rod is divided into three stages and the moving distances of the three stages are the same, the initial distance between the docking sleeve and the docking gear block is smaller than the single-stage stroke distance of the electric push rod, the height of the first driven gear is greater than the single-stage stroke distance of the electric push rod, the height of the second driven gear matches the total stroke distance of the two stages of the electric push rod, the height difference between the third driven gear and the second driven gear matches the single-stage stroke distance of the electric push rod and is greater than the height of the second transmission gear, and the height of the main gear matches the total moving distance of the electric push rod in three stages.

[0024] By adopting the above technical solution, the transmission switching among the first driven gear, the second driven gear, the third driven gear and the main gear can be realized, thus providing conditions for switching among four different modes of the stirring component.

[0025] The first support platform is fixedly connected to the bottom of the main mixing tank through a fixed bracket, the second support platform is fixed to the top of the first support platform through a fixed bracket, and the bottom of the main mixing tank is connected to the boiler water delivery channel through a drain pipe.

[0026] By adopting the above technical solution, the fixed support of the first support platform and the second support platform can be achieved, and the boiler water with adjusted HP value can be transported out through the drainage pipe.

[0027] The beneficial effects of the automatic ammonia dosing device of the utility model are:

[0028] By setting up two primary mixing tanks, the initial pH value of the boiler water can be adjusted, and then it is transported to the main mixing tank for secondary pH adjustment. During this process, the primary mixing tank can be used to add boiler water and ammonia water. Compared with the mode of blending in a single tank, the waiting time between two adjacent blending processes is effectively reduced, and the blending efficiency is improved. At the same time, the setting of the stirring component can achieve full mixing of ammonia water and boiler water. Through the operation of the four modes of the stirring mechanism, the energy consumption during operation is lower, achieving the effect of energy saving. Description of the drawings:

[0029] Figure 1 This is a schematic diagram of the overall structure of the automatic ammonia dosing device proposed in the utility model;

[0030] Figure 2 This is a structural schematic diagram of the automatic ammonia dosing device proposed in the utility model from another perspective;

[0031] Figure 3 This is a structural schematic diagram of the automatic ammonia dosing device proposed by the utility model without the first supporting platform and the second supporting platform;

[0032] Figure 4This is a schematic diagram of the structure of the ammonia adding component of the automatic ammonia dosing device proposed in the utility model;

[0033] Figure 5 This is a cross-sectional exploded view of the stirring assembly of the automatic ammonia dosing device proposed in the utility model;

[0034] Figure 6 This is a schematic diagram of the connection between the linkage switching unit and some parts of the first stirring unit of the automatic ammonia dosing device proposed by the utility model;

[0035] Figure 7 This is a structural front view of the stirring assembly of the automatic ammonia dosing device proposed by the utility model.

[0036] In the figure: 1. Equipment body; 101. Total mixing tank; 102. Primary mixing tank; 103. First support platform; 104. Second support platform; 105. Fixed bracket; 106. Drain pipe; 2. Ammonia adding assembly; 201. First dosing pipe; 202. Four-way valve; 203. Second dosing pipe; 3. Water adding assembly; 301. First water adding pipe; 302. First three-way valve; 303. Second water adding pipe; 4. Delivery assembly; 401. Second three-way valve; 402. Drain pipe; 403. Delivery pump; 5. Stirring assembly; 501. First stirring unit; 5011. First stirring shaft; 5012. Limiting guide block; 5013 , lifting cylinder; 5014, docking gear block; 5015, supporting ring block; 502, second stirring unit; 5021, second stirring shaft; 5022, first driven gear; 503, third stirring unit; 5031, third stirring shaft; 5032, second driven gear; 5033, third driven gear; 504, driving motor; 505, main gear; 506, docking sleeve; 507, linkage switching unit; 5071, electric push rod; 5072, lifting seat; 5073, L-shaped lifting rod; 5074, connecting plate; 5075, lifting shaft; 5076, first transmission gear; 5077, second transmission gear. Specific implementation method:

[0037] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0038] Reference Figures 1 to 7, an automatic ammonia dosing device, comprising an equipment body 1 composed of a total mixing tank 101, a primary mixing tank 102, a first support platform 103, and a second support platform 104, the total mixing tank 101, the primary mixing tank 102, the first support platform 103, and the second support platform 104 are arranged in sequence from bottom to top in the vertical direction, the primary mixing tank 102 is provided with two and symmetrically fixed on the top of the total mixing tank 101, the tops of the two primary mixing tanks 102 are provided with an ammonia adding component 2 and a water adding component 3, and the water adding component 3 extends to the interior of the total mixing tank 101, and a conveying component 4 is distributed between the two primary mixing tanks 102 and the total mixing tank 101, and a stirring component 5 extending to the interior of the total mixing tank 101 and the primary mixing tank 102 is distributed on the tops of the total mixing tank 101, the primary mixing tank 102, the first support platform 103, and the second support platform 104;

[0039] The water adding component 3 is used to realize the addition of boiler water to the two primary mixing tanks 102, the ammonia adding component 2 is used to realize the quantitative addition operation of ammonia water in the main mixing tank 101 and the primary mixing tank 102, and the conveying component 4 is used to convey the boiler water initially blended in the two primary mixing tanks 102 to the main mixing tank 101;

[0040] The stirring assembly 5 is used to achieve stirring and mixing of the solutions inside the two primary mixing tanks 102 and the main mixing tank 101;

[0041] The ammonia adding component 2 includes a first dosing pipe 201, a four-way valve 202, and a second dosing pipe 203;

[0042] The first dosing pipe 201 is connected to the output end of the dosing pump and the input end of the four-way valve 202, and the second dosing pipe 203 is respectively connected to the three output ends of the four-way valve 202 and extends to the interior of the main mixing tank 101 and the two primary mixing tanks 102 respectively;

[0043] The water adding assembly 3 includes a first water adding pipe 301, a first three-way valve 302, and a second water adding pipe 303;

[0044] The first water supply pipe 301 is connected to the input end of the first three-way valve 302, and the second water supply pipe 303 is respectively connected to the two output ends of the first three-way valve 302 and extends to the inside of the two primary mixing tanks 102 respectively;

[0045] The delivery assembly 4 includes a second three-way valve 401, a discharge pipe 402, and a delivery pump 403;

[0046] The input end of the delivery pump 403 is connected to the output end of the second three-way valve 401 through a pipeline, and the output end of the delivery pump 403 is connected to the inner cavity of the main mixing tank 101 through a pipeline;

[0047] The liquid discharge pipe 402 is connected to the two input ends of the second three-way valve 401 and is in communication with the two primary mixing tanks 102;

[0048] The first support platform 103 is fixedly connected to the bottom of the main mixing tank 101 through a fixed bracket 105, the second support platform 104 is fixed to the top of the first support platform 103 through the fixed bracket 105, and the bottom of the main mixing tank 101 is connected to the boiler water delivery channel through a drain pipe 106.

[0049] It should be noted that: the main mixing tank 101 and the two primary mixing tanks 102 are equipped with an industrial acidity meter, a regulator and a water level sensor;

[0050] When adjusting the pH value of boiler water, the first three-way valve 302 is controlled so that the boiler water is transported to the inside of a primary mixing tank 102 through the first water adding pipe 301, the first three-way valve 302, and a second water adding pipe 303. During this process, the industrial acidity meter can detect the pH value of the boiler water, and the detected data is transmitted to the external controller. The controller controls the four-way valve 202 and the dosing pump so that a certain amount of ammonia water is transported to the inside of this primary mixing pipe 102. During this process, the first three-way valve 302 switches the channel so that the boiler water is transported to the inside of another primary mixing tank 102 through the first water adding pipe 301, the first three-way valve 302, and another second water adding pipe 303. After that, the four-way valve 202 is also used to switch the channel to add ammonia water to the inside of another primary mixing tank 102.

[0051] In the process of blending the boiler water in another primary mixing tank 102, the boiler water in the first primary mixing tank 102 can be transported to the main mixing tank 101 through a delivery pump. After the delivery is completed, the first primary mixing tank 102 can be subjected to secondary boiler water addition and pH blending. The boiler water entering the main mixing tank 101 is then tested by an industrial acidity meter. If the pH value meets the requirements, it can be directly discharged through the drain pipe 106. If the pH value does not meet the requirements, its external controller controls the four-way valve 202 to switch the channel, and delivers an appropriate amount of ammonia water to the main mixing tank 101 for secondary pH blending. Thereafter, the boiler water in another primary mixing tank 102 is transported to the main mixing tank 101 for the same operation. This reciprocating operation can achieve efficient blending of the pH value of the boiler water. Compared with the blending mode of a single tank, the waiting time in two adjacent blending processes is effectively reduced, thereby improving the blending efficiency.

[0052] The stirring assembly 5 includes a first stirring unit 501, a second stirring unit 502, a third stirring unit 503, a driving motor 504, a main gear 505, a docking sleeve 506 and a linkage switching unit 507;

[0053] The first stirring unit 501 is used to stir the solution in the total mixing tank 101, the second stirring unit 502 and the third stirring unit 503 are used to stir the solutions in the two primary mixing tanks 102, respectively. The driving motor 504, the main gear 505, the docking sleeve 506, and the linkage switching unit 507 cooperate with each other to drive the first stirring unit 501, the second stirring unit 502, and the third stirring unit 503, and at the same time realize the switching of the rotation modes of the first stirring unit 501, the second stirring unit 502, and the third stirring unit 503;

[0054] The first stirring unit 501 includes a first stirring shaft 5011, a limiting guide block 5012, a lifting cylinder 5013, a docking tooth block 5014 and a supporting ring block 5015;

[0055] The first stirring shaft 5011 is rotatably mounted inside the main mixing tank 101 and extends to the top of the main mixing tank 101, the limiting guide block 5012 is fixed to the top outside of the first stirring shaft 5011, the lifting cylinder 5013 is slidably mounted on the first stirring shaft 5011 and the outside of the limiting guide block 5012, the docking tooth block 5014 is fixed to the top of the lifting cylinder 5013, and the supporting ring block 5015 is rotatably mounted on the outside of the lifting cylinder 5013;

[0056] The second stirring unit 502 includes a second stirring shaft 5021 and a first driven gear 5022;

[0057] The limiting guide block 5012 is rotatably installed inside a primary mixing tank 102 and extends to the primary mixing tank 102 and the first support platform 103 to the top of the first support platform 103. The first driven gear 5022 is distributed above the first support platform 103 and fixed to the outside of the second stirring shaft 5021.

[0058] The third stirring unit 503 includes a third stirring shaft 5031, a second driven gear 5032, and a third driven gear 5033;

[0059] The third stirring shaft 5031 is rotatably mounted inside another pre-mixing tank 102 and extends through the top of the first support platform 103. The second driven gear 5032 and the third driven gear 5033 are distributed from bottom to top above the first support platform 103 and fixed to the outer side of the third stirring shaft 5031.

[0060] The driving motor 504 is fixed to the top of the second supporting platform 104, and the output end of the driving motor 504 passes through the bottom of the second supporting platform 104 and is fixedly connected to the main gear 505. The first driven gear 5022 and the second driven gear 5032 are symmetrically distributed on both sides of the main gear 505;

[0061] The docking sleeve 506 is distributed below the first support platform 103 and penetrates through the first support platform 103 and is fixedly connected to the main gear 505. The docking sleeve 506 is located directly above the docking gear block 5014.

[0062] The linkage switching unit 507 includes an electric push rod 5071, a lifting seat 5072, an L-shaped lifting rod 5073, a connecting plate 5074, a lifting shaft 5075, a first transmission gear 5076 and a second transmission gear 5077;

[0063] The electric push rod 5071 is installed on the top of the first support platform 103, the lifting seat 5072 is fixed on the top of the conveying end of the electric push rod 5071 and distributed above the second support platform 104, and the L-shaped lifting rod 5073 and two lifting shafts 5075 are fixed on the bottom of the lifting seat 5072;

[0064] The L-shaped lifting rod 5073 passes through the first support platform 103 to the bottom of the first support platform 103, and the connecting plate 5074 is fixed to one end of the L-shaped lifting rod 5073 located below the first support platform 103, and the connecting plate 5074 is fixed to the outer ring of the supporting ring block 5015;

[0065] The two lifting shafts 5075 penetrate the second support platform 104 to the bottom of the second support platform 104, and the first transmission gear 5076 and the second transmission gear 5077 are rotatably connected to the bottom of the two lifting shafts 5075 respectively, and the first transmission gear 5076 is distributed between the first driven gear 5022 and the main gear 505 and meshes with the first driven gear 5022 and the main gear 505, and the second transmission gear 5077 is distributed between the main gears 505 and meshes with the second driven gear 5032 and the main gear 505;

[0066] The inner cavity of the docking sleeve 506 is formed with a docking tooth cavity matching the outer wall of the docking tooth block 5014, and the inner side of the lifting cylinder 5013 is formed with a limiting groove for the limiting guide block 5012 to limit and slide;

[0067] The upward stroke of the electric push rod 5071 is divided into three stages and the moving distances of the three stages are the same, the initial distance between the docking sleeve 506 and the docking tooth block 5014 is smaller than the single-stage stroke distance of the electric push rod 5071, the height of the first driven gear 5022 is greater than the single-stage stroke distance of the electric push rod 5071, the height of the second driven gear 5032 matches the total stroke distance of the two stages of the electric push rod 5071, the height difference between the third driven gear 5033 and the second driven gear 5032 matches the single-stage stroke distance of the electric push rod 5071, and is greater than the height of the second transmission gear 5077, and the height of the main gear 505 matches the total moving distance of the electric push rod 5071 in three stages.

[0068] When the boiler water and the ammonia water are mixed, the stirring component 5 can be started synchronously to achieve mixing and stirring of the solutions inside the main mixing tank 101 and the two primary mixing tanks 102. The stirring component 5 has the following four operating modes:

[0069] The first mode is: the electric push rod 5071 is in an initial unextended state, at which time the docking gear block 5014 and the docking sleeve 506 are in a separated state, the first transmission gear 5076 is synchronously meshed with the main gear 505 and the first driven gear 5022, and the second transmission gear 5077 is synchronously meshed with the main gear 505 and the second driven gear 5032. At this time, when the driving motor 504 is running, the first driven gear 5022 and the second driven gear 5032 can be synchronously driven to rotate synchronously through the main gear 505, that is, the second stirring shaft 5021 and the third stirring shaft 5031 rotate synchronously, and the first stirring shaft 5011 is in a stationary state, that is, at this time, only the solutions in the two primary mixing tanks 102 are stirred. This mode is suitable for the initial operation of the equipment, at which time no solution has been input into the total mixing tank 101;

[0070] The second mode is: the electric push rod 5071 extends upward to the first stage, the docking gear block 5014, the first transmission gear 5076, and the second transmission gear 5077 move upward synchronously, at this time, the docking gear block 5014 and the docking sleeve 506 are in docking state, the first transmission gear 5076 is synchronously meshed with the main gear 505 and the first driven gear 5022, and the second transmission gear 5077 is synchronously meshed with the main gear 505 and the second driven gear 5032. When the driving motor 504 is running, it can synchronously drive the first driven gear 5022, the second driven gear 5032 and the docking gear block 5014 to rotate, so that the first stirring shaft 5011, the second stirring shaft 5021, and the third stirring shaft 5031 rotate synchronously. This mode is suitable for the situation where both the initial mixing tank 102 and the total mixing tank 101 have solutions;

[0071] The third mode is: the electric push rod 5071 extends upward to run to the second stage, at this time, the docking gear block 5014 and the docking sleeve 506 remain in a docking state, the first transmission gear 5076 and the main gear 505 and the first driven gear 5022 are still in a meshing state, the second transmission gear 5077 is separated from the second driven gear 5032 and does not contact the third driven gear 5033, at this time, when the driving motor 504 is running, the first stirring shaft 5011 and the second stirring shaft 5021 rotate synchronously, and the third stirring shaft 5031 remains stationary. This mode is suitable for the stage where the primary mixing tank 102 where the third stirring shaft 5031 is located is adding water;

[0072] The fourth mode is: the electric push rod 5071 extends upward to run to the third stage, the docking gear block 5014 and the docking sleeve 506 remain in a docking state, the first transmission gear 5076 and the first driven gear 5022 are separated, and the second transmission gear 5077 is in contact and meshing with the third driven gear 5033. At this time, when the driving motor 504 is running, the first stirring shaft 5011 and the third stirring shaft 5031 rotate synchronously, and the second stirring shaft 5021 remains stationary. This mode is suitable for the stage where the primary mixing tank 102 where the second stirring shaft 5021 is located is adding water;

[0073] By operating the stirring mechanism 5 in four modes, the energy consumption during operation is lowered, thus achieving the effect of energy saving.

[0074] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. An automatic ammonia dosing device, comprising an equipment body (1) composed of a total mixing tank (101), a primary mixing tank (102), a first support platform (103), and a second support platform (104), wherein the total mixing tank (101), the primary mixing tank (102), the first support platform (103), and the second support platform (104) are arranged in sequence from bottom to top along the vertical direction, characterized in that: The two preliminary mixing tanks (102) are provided and symmetrically fixed on the top of the main mixing tank (101); the tops of the two preliminary mixing tanks (102) are provided with an ammonia adding component (2) and a water adding component (3), and the water adding component (3) extends into the interior of the main mixing tank (101); and a conveying component (4) is distributed between the two preliminary mixing tanks (102) and the main mixing tank (101); and the tops of the main mixing tank (101), the preliminary mixing tank (102), the first supporting platform (103), and the second supporting platform (104) are provided with a stirring component (5) extending into the interior of the main mixing tank (101) and the preliminary mixing tank (102); The water adding component (3) is used to realize the addition of boiler water to the inside of the two primary mixing tanks (102); the ammonia adding component (2) is used to realize the quantitative addition operation of ammonia water inside the main mixing tank (101) and the primary mixing tank (102); and the conveying component (4) is used to convey the boiler water initially blended inside the two primary mixing tanks (102) to the inside of the main mixing tank (101); The stirring assembly (5) is used to achieve stirring and mixing of the solutions inside the two primary mixing tanks (102) and the main mixing tank (101).

2. The automatic ammonia dosing device according to claim 1 is characterized in that: The ammonia adding component (2) comprises a first dosing pipe (201), a four-way valve (202), and a second dosing pipe (203); The first dosing pipe (201) is connected to the output end of the dosing pump and the input end of the four-way valve (202), and the second dosing pipe (203) is respectively connected to the three output ends of the four-way valve (202) and respectively extends to the interior of the main mixing tank (101) and the two primary mixing tanks (102); The water adding assembly (3) comprises a first water adding pipe (301), a first three-way valve (302), and a second water adding pipe (303); The first water adding pipe (301) is connected to the input end of the first three-way valve (302), and the second water adding pipe (303) is respectively connected to the two output ends of the first three-way valve (302) and respectively extends to the inside of the two primary mixing tanks (102); The delivery assembly (4) comprises a second three-way valve (401), a liquid discharge pipe (402), and a delivery pump (403); The input end of the delivery pump (403) is connected to the output end of the second three-way valve (401) through a pipeline, and the output end of the delivery pump (403) is connected to the inner cavity of the main mixing tank (101) through a pipeline. The discharge pipe (402) is connected to the two input ends of the second three-way valve (401) and is connected to the two primary mixing tanks (102).

3. The automatic ammonia dosing device according to claim 2 is characterized in that: The stirring assembly (5) comprises a first stirring unit (501), a second stirring unit (502), a third stirring unit (503), a driving motor (504), a main gear (505), a docking sleeve (506) and a linkage switching unit (507); The first stirring unit (501) is used to stir the solution inside the main mixing tank (101), the second stirring unit (502) and the third stirring unit (503) are used to stir the solutions inside the two primary mixing tanks (102), respectively; the driving motor (504), the main gear (505), the docking sleeve (506), and the linkage switching unit (507) cooperate with each other to drive the first stirring unit (501), the second stirring unit (502), and the third stirring unit (503), and simultaneously switch the rotation modes of the first stirring unit (501), the second stirring unit (502), and the third stirring unit (503); The first stirring unit (501) comprises a first stirring shaft (5011), a limiting guide block (5012), a lifting cylinder (5013), a docking tooth block (5014) and a supporting ring block (5015); The first stirring shaft (5011) is rotatably mounted inside the main mixing tank (101) and extends to the top of the main mixing tank (101); the limiting guide block (5012) is fixed to the outer side of the top of the first stirring shaft (5011); the lifting cylinder (5013) is slidably mounted on the outer sides of the first stirring shaft (5011) and the limiting guide block (5012); the docking tooth block (5014) is fixed to the top of the lifting cylinder (5013); and the supporting ring block (5015) is rotatably mounted on the outer side of the lifting cylinder (5013); The second stirring unit (502) comprises a second stirring shaft (5021) and a first driven gear (5022); The limiting guide block (5012) is rotatably installed inside a primary mixing tank (102) and extends to the primary mixing tank (102) and the first support platform (103) to the top of the first support platform (103); the first driven gear (5022) is distributed above the first support platform (103) and fixed to the outside of the second stirring shaft (5021); The third stirring unit (503) comprises a third stirring shaft (5031), a second driven gear (5032), and a third driven gear (5033); The third stirring shaft (5031) is rotatably mounted inside another primary mixing tank (102) and extends through the top of the first support platform (103); the second driven gear (5032) and the third driven gear (5033) are distributed from bottom to top above the first support platform (103) and are fixed to the outer side of the third stirring shaft (5031); The driving motor (504) is fixed on the top of the second supporting platform (104), the output end of the driving motor (504) passes through the bottom of the second supporting platform (104) and is fixedly connected to the main gear (505), and the first driven gear (5022) and the second driven gear (5032) are symmetrically distributed on both sides of the main gear (505); The docking sleeve (506) is distributed below the first support platform (103) and passes through the first support platform (103) to be fixedly connected to the main gear (505). The docking sleeve (506) is located directly above the docking gear block (5014).

4. The automatic ammonia dosing device according to claim 3 is characterized in that: The linkage switching unit (507) comprises an electric push rod (5071), a lifting seat (5072), an L-shaped lifting rod (5073), a connecting plate (5074), a lifting shaft (5075), a first transmission gear (5076) and a second transmission gear (5077); The electric push rod (5071) is installed on the top of the first support platform (103), the lifting seat (5072) is fixed to the top of the conveying end of the electric push rod (5071) and is distributed above the second support platform (104), and the L-shaped lifting rod (5073) and two lifting shafts (5075) are fixed to the bottom of the lifting seat (5072); The L-shaped lifting rod (5073) passes through the first support platform (103) to the bottom of the first support platform (103), and the connecting plate (5074) is fixed to one end of the L-shaped lifting rod (5073) located below the first support platform (103), and the connecting plate (5074) is fixed to the outer ring of the supporting ring block (5015); The two lifting shafts (5075) pass through the second support platform (104) to the bottom of the second support platform (104), and the first transmission gear (5076) and the second transmission gear (5077) are respectively rotatably connected to the bottom of the two lifting shafts (5075), and the first transmission gear (5076) is distributed between the first driven gear (5022) and the main gear (505) and meshes with the first driven gear (5022) and the main gear (505), and the second transmission gear (5077) is distributed between the main gears (505) and meshes with the second driven gear (5032) and the main gear (505).

5. The automatic ammonia dosing device according to claim 3 is characterized in that: The inner cavity of the docking sleeve (506) is formed with a docking tooth cavity matching the outer wall of the docking tooth block (5014), and the inner side of the lifting cylinder (5013) is formed with a limiting groove for the limiting guide block (5012) to limit and slide.

6. The automatic ammonia dosing device according to claim 4 is characterized in that: The upward stroke of the electric push rod (5071) is divided into three stages and the moving distances of the three stages are the same; the initial distance between the docking sleeve (506) and the docking tooth block (5014) is smaller than the single-stage stroke distance of the electric push rod (5071); the height of the first driven gear (5022) is larger than the single-stage stroke distance of the electric push rod (5071); the height of the second driven gear (5032) matches the total stroke distance of the two stages of the electric push rod (5071); the height difference between the third driven gear (5033) and the second driven gear (5032) matches the single-stage stroke distance of the electric push rod (5071) and is larger than the height of the second transmission gear (5077); and the height of the main gear (505) matches the total moving distance of the electric push rod (5071) in three stages.

7. The automatic ammonia dosing device according to claim 1 is characterized in that: The first support platform (103) is fixedly connected to the bottom of the main mixing tank (101) via a fixed bracket (105), the second support platform (104) is fixed to the top of the first support platform (103) via a fixed bracket (105), and the bottom of the main mixing tank (101) is connected to the boiler water delivery channel via a drain pipe (106).

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