Slaked lime powder on-line adding and efficient magnesium removal and desulfurization reaction device

Abstract

The utility model discloses a slaked lime powder on-line feeding and efficient magnesium removal and desulfurization reaction device which comprises a dissolution reaction tank, a slaked lime feeding assembly, a reaction flocculation tank, an overflow pipe, a liquid level meter and a frequency conversion material transfer pump. A water inlet pipe and a powder feeding opening are formed in the top of the dissolving reaction tank; the slaked lime adding assembly is used for adding slaked lime powder into the dissolving reaction tank; the reaction flocculation tank is communicated with the dissolution reaction tank through an overflow port, a feed liquid discharge port is formed in the bottom, and a flocculant filling port and a coagulant aid filling port are formed in the top; the bottom of the overflow pipe extends below the liquid level of the dissolving reaction tank, the top of the overflow pipe is communicated with the overflow port, and the liquidometer is used for monitoring the liquid level value of the reaction flocculation tank in real time; and the variable-frequency transfer pump is used for performing variable-frequency adjustment according to the liquid level value monitored by the liquid level meter. According to the utility model, the problem that only low-concentration magnesium ions, sulfate ions and desulfurization wastewater of suspended matters can be treated by the existing triple box treatment process is solved, and the automation degree is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to an online feeding device for hydrated lime powder and a high-efficiency magnesium-removing and desulfurizing reaction device.

Background Art

[0002] The desulfurization wastewater of coal-fired power plants contains a large amount of calcium, magnesium, chlorine, sulfate ions and suspended solids, and is a kind of wastewater with high salinity and high corrosivity. The conventional treatment method is to adopt the three-compartment treatment process to remove magnesium, calcium hardness and suspended solids step by step, and then enter the subsequent zero-discharge deep treatment system.

[0003] The configuration of the magnesium-removing and softening section of the traditional three-compartment treatment process is: a set of lime powder silo feeding system, a set of lime milk preparation and dosing device, and a set of reaction, neutralization and flocculation three-compartment device. A large amount of external process water or system self-produced water needs to be introduced when preparing lime milk in the traditional three-compartment process, and the treatment capacity adaptation range is narrow, and it can only adapt to the working conditions with relatively stable water quality and water volume. To meet the effluent water quality requirements, the general requirements for the influent water quality of the traditional three-compartment are that the magnesium ion concentration ≤ 10000mg / L and the sulfate ion concentration ≤ 20000mg / L.

[0004] At present, due to multiple factors such as coal quality, plant water quality, and limestone quality in many domestic coal-fired power plants, the quality of the desulfurization wastewater generated has changed greatly, and the concentrations of important indicators such as magnesium ions and sulfate ions have increased significantly, resulting in that the existing three-compartment treatment process can no longer be qualified for treatment, and the process flow is long, the adaptability is weak, and the automation level is low.

[0005] In view of this, it is necessary to provide an online feeding device for hydrated lime powder and a high-efficiency magnesium-removing and desulfurizing reaction device to overcome the above defects.

Content of the Utility Model

[0006] The purpose of the utility model is to provide an online feeding device for hydrated lime powder and a high-efficiency magnesium-removing and desulfurizing reaction device, aiming to solve the problem that the existing three-compartment treatment process can no longer be qualified for treating high-ion-concentration wastewater, with a short process flow, strong adaptability and high automation level.

[0007] To achieve the above purpose, the utility model provides an online feeding device for hydrated lime powder and a high-efficiency magnesium-removing and desulfurizing reaction device, including:

[0008] A dissolution reaction tank, the dissolution reaction tank is a closed box body, and a water inlet pipe and a powder feeding port are arranged on one side of the top; the water inlet pipe is used for supplying the raw wastewater into the dissolution reaction tank;

[0009] A hydrated lime feeding assembly, the hydrated lime feeding assembly is used for feeding hydrated lime powder into the dissolution reaction tank through the powder feeding port;

[0010] Reaction flocculation tank, the reaction flocculation tank is an upper-opening box body, which is arranged adjacent to the dissolution reaction tank and communicated through an overflow port; a liquid discharge port is opened at the bottom of the reaction flocculation tank, and a flocculant injection port and a coagulant aid injection port are opened at the top;

[0011] Overflow pipe, the bottom of the overflow pipe extends below the liquid level of the dissolution reaction tank, and the top is communicated with the overflow port, so that the preliminary reaction wastewater in the dissolution reaction tank rises from the bottom of the overflow pipe and is discharged into the reaction flocculation tank through the overflow port;

[0012] Liquid level gauge, the liquid level gauge is arranged at the top of the reaction flocculation tank for real-time monitoring of the liquid level value of the reaction flocculation tank;

[0013] Variable-frequency transfer pump, the variable-frequency transfer pump is communicated with the liquid discharge port, and is used for variable-frequency adjustment according to the liquid level value monitored by the liquid level gauge to control its own output flow.

[0014] In a preferred embodiment, a variable-frequency stirrer is arranged in the dissolution reaction tank, and the variable-frequency stirrer is used for stirring to fully mix the raw wastewater and the hydrated lime powder.

[0015] In a preferred embodiment, a fixed-frequency flocculation stirrer is arranged in the reaction flocculation tank.

[0016] In a preferred embodiment, a connecting pipe is further arranged at the top of the dissolution reaction tank, and the connecting pipe is respectively used for communicating the inside of the dissolution reaction tank with the outside; a plurality of spray heads are arranged in the connecting pipe and are all communicated with the water inlet pipe, and the spray heads are used for spraying a water curtain formed by the raw wastewater into the dissolution reaction tank.

[0017] In a preferred embodiment, the side walls of the reaction flocculation tank and the dissolution reaction tank that are close to each other are designed for reuse. The volume V1 of the dissolution reaction tank = Q×T1, where Q is the preset maximum wastewater flow rate and T1 is the residence time of the wastewater in the dissolution reaction tank; the volume V2 of the reaction flocculation tank = Q×T2, and T2 is the residence time of the wastewater in the reaction flocculation tank.

[0018] In a preferred embodiment, the hydrated lime dosing assembly includes a hydrated lime silo, a feeding pipe arranged below the hydrated lime silo, a first plug valve arranged on the feeding pipe, a screw conveyor communicated with the bottom of the feeding pipe, and a discharging pipe communicated between the side of the screw conveyor away from the feeding pipe and the powder dosing port; the first plug valve is used to open or close the feeding pipe; the screw conveyor is used to continuously convey the hydrated lime powder falling into the feeding pipe into the discharging pipe.

[0019] In a preferred embodiment, a powder bin vibrating motor is provided at a preset position on the bottom side of the hydrated lime bin, and the powder bin vibrating motor is used to break the arch when the hydrated lime powder in the hydrated lime bin bridges.

[0020] In a preferred embodiment, a variable-frequency weighing feeder is further provided at the position of the feeding pipe below the first plug valve to adjust and weigh the amount of hydrated lime powder discharged from the feeding pipe.

[0021] In a preferred embodiment, a second plug valve is further provided on the discharging pipe, and the second plug valve is used to open or cut off the discharging pipe.

[0022] In a preferred embodiment, a pH meter is provided at the top of the dissolution reaction tank, the pH meter is located in the overflow pipe, and the bottom extends into the liquid surface.

[0023] The on-line addition of hydrated lime powder and high-efficiency magnesium removal and desulfurization reaction device provided by the utility model has a simple process, an orderly combination of component structures, a wide adaptability range of the overall device processing capacity, can solve the difficulties and pain points that the triple-tank treatment process in the existing industry can only treat desulfurized wastewater with low concentrations of magnesium ions, sulfate ions and suspended solids, and also solves the problem of low automation in the existing technology. Compared with the existing triple-tank treatment process, the removal capacity of magnesium ions and sulfate ions can be increased by 3-5 times, and the water quality of desulfurized wastewater generated under all operating conditions of domestic coal-fired power plants can be met; therefore, the utility model is not only applicable to the field of desulfurized wastewater in coal-fired power plants, but also applicable to other industrial wastewater treatment fields.

Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic diagram of the on-line addition of hydrated lime powder and high-efficiency magnesium removal and desulfurization reaction device provided by the present utility model.

[0026] Reference numerals in the figure: 10, dissolution reaction tank; 11, water inlet pipe; 12, powder feeding port; 13, variable-frequency mixer; 14, connecting pipe; 15, spray head; 16, pH meter;

[0027] 20. Quicklime feeding assembly; 21. Quicklime silo; 22. Feeding pipe; 23. First slide valve; 24. Screw conveyor; 25. Discharging pipe; 26. Bin vibrator motor; 27. Variable-frequency weighing feeder

[0028] 30. Reaction and flocculation tank; 31. Liquid discharge port; 32. Flocculant injection port; 33. Coagulant aid injection port; 34. Fixed-frequency flocculation mixer

[0029] 40. Overflow pipe; 401. Overflow port; 50. Liquid level gauge; 60. Variable-frequency transfer pump

Detailed implementation manners

[0030] In order to make the objectives, technical solutions and beneficial technical effects of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners. It should be understood that the specific implementation manners described in this specification are only for explaining the present utility model and are not intended to limit the present utility model

[0031] It should also be understood that the terms used in this specification of the present utility model are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. As used in this specification of the present utility model and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include the plural forms

[0032] It should be further understood that the term " / or" used in this specification of the present utility model and the appended claims refers to any combination and all possible combinations of one or more of the related listed items, and includes these combinations

[0033] In an embodiment of the present utility model, a device for online feeding of quicklime powder and high-efficiency magnesium removal and desulfurization reaction is provided, which integrates online feeding, dissolution and reaction of quicklime powder, can adapt to large-scale adjustment of wastewater volume, and has a wide water quality adaptation range. The applicable range of magnesium ions is 0 - 30000 mg / L, and the applicable range of sulfate ions is 0 - 100000 mg / L. The water production index is better than the water quality requirements of the subsequent system inlet water, and it has the characteristics of short process flow, strong adaptability and high automation level

[0034] As Figure 1 shown, the device for online feeding of quicklime powder and high-efficiency magnesium removal and desulfurization reaction includes: dissolution and reaction tank 10, quicklime feeding assembly 20, reaction and flocculation tank 30, overflow pipe 40, liquid level gauge 50, variable-frequency transfer pump 60

[0035] The dissolution reaction tank 10 is a non-standard closed square box made of carbon steel, and a water inlet pipe 11 and a powder feeding port 12 are provided on one side of the top. The effective volume V1 of the dissolution reaction tank 10 = Q×T1, where Q is the preset maximum wastewater flow rate and T1 is the residence time of the wastewater in the dissolution reaction tank 10. One end of the water inlet pipe 11 is connected to the inside of the dissolution reaction tank 10, and the other end is connected to a water inlet pump, so as to supply the raw wastewater into the dissolution reaction tank 10.

[0036] Furthermore, a variable-frequency mixer 13 is provided in the dissolution reaction tank 10. The variable-frequency mixer 13 is used to stir to fully mix the raw wastewater and hydrated lime powder. Specifically, the impeller of the variable-frequency mixer 13 is made of a specific material and in a specific form, and the rotation speed of the mixer can be precisely adjusted by a variable-frequency motor. According to the water volume and quality of the incoming water at the front end, a specific rotation speed is set to ensure that the hydrated lime powder in the dissolution reaction tank 10 can be fully dissolved and reach the set reaction degree.

[0037] In this embodiment, the hydrated lime feeding assembly 20 is used to feed hydrated lime powder into the dissolution reaction tank 10 through the powder feeding port 12.

[0038] Specifically, the hydrated lime feeding assembly 20 includes a hydrated lime silo 21, a feeding pipe 22 provided below the hydrated lime silo 21, a first plug valve 23 provided on the feeding pipe 22, a screw conveyor 24 connected to the bottom of the feeding pipe 22, and a discharging pipe 25 connecting the side of the screw conveyor 24 away from the feeding pipe 22 and the powder feeding port 12.

[0039] The first plug valve 23 is used to open or close the feeding pipe 22 to cut off the powder discharge. Among them, the first plug valve 23 can be a manual plug door structure.

[0040] The screw conveyor 24 continuously conveys the hydrated lime powder falling from the feeding pipe 22 into the discharging pipe 25. It should be noted that the specific structure and principle of the screw conveyor 24 can refer to the prior art and the reference drawings, and are not limited in the present invention.

[0041] The hydrated lime silo 21 is a funnel silo, and a powder silo vibrating motor 26 is provided at a preset position on the bottom side. In this embodiment, the number of powder silo vibrating motors 26 is two, and they are distributed up and down along the conical bottom surface of the hydrated lime silo 21. The powder silo vibrating motor 26 is used to vibrate and break the arch when the hydrated lime powder in the hydrated lime silo 21 bridges, ensuring normal powder feeding.

[0042] A variable-frequency weighing feeder 27 is also provided at the position of the feeding pipe 22 below the first plug valve 23. The variable-frequency weighing feeder 27 is used to adjust and weigh the amount of hydrated lime powder discharged from the feeding pipe 22, that is, the discharged powder amount can be precisely adjusted through a variable-frequency motor according to the signal given by the control system.

[0043] Among them, the discharging pipe 25 is further provided with a second sluice valve 28. In this embodiment, the second sluice valve 28 is a pneumatic sluice valve, which is arranged between the screw conveyor 24 and the powder feeding port 12, and is used to open or cut off the discharging pipe 25, so as to cut off the powder from entering the dissolution reaction tank 10. At the same time, the water vapor in the dissolution reaction tank 10 can be blocked from entering the screw conveyor 24 and the hydrated lime silo 21, avoiding the moisture absorption and caking of the hydrated lime powder.

[0044] Furthermore, in one embodiment, a connecting pipe 14 is further provided at the top of the dissolution reaction tank 10. The connecting pipe 14 is used to connect the inside of the dissolution reaction tank 10 with the outside. A plurality of spray heads 15 are provided in the connecting pipe 14, all of which are connected to the water inlet pipe 11. The spray heads 15 are used to spray a water curtain formed by the original wastewater into the dissolution reaction tank 10. In this embodiment, three layers of spray heads 15 are arranged in the connecting pipe 14. The high-pressure original desulfurization wastewater is sprayed out through the spray heads 15 to form three layers of water curtains, so that both the gas side inside the dissolution reaction tank 10 can be kept connected with the external environment, and the gas containing dust inside during operation can be discharged into the external environment through the connecting pipe 14 after dust removal by the water curtain.

[0045] In this embodiment, the reaction and flocculation tank 30 is a non-standard box body with an open top made of carbon steel, which is arranged adjacent to the dissolution reaction tank 10 and is connected through an overflow port 401.

[0046] The side walls of the reaction and flocculation tank 30 and the dissolution reaction tank 10 close to each other are designed for reuse, that is, the two are manufactured with a common wall plate. The volume V2 of the reaction and flocculation tank 30 = Q×T2, where T2 is the residence time of the wastewater in the reaction and flocculation tank 30.

[0047] A liquid discharge port 31 is opened at the bottom of the reaction and flocculation tank 30, and a flocculant injection port 32 and a coagulant aid injection port 33 are opened at the top. The flocculant injection port 32 is used for adding flocculant, and the coagulant aid injection port 33 is used for adding coagulant aid.

[0048] Among them, a fixed-frequency flocculation mixer 34 is provided in the reaction and flocculation tank 30. The fixed-frequency flocculation mixer 34 stirs the liquid in the reaction and flocculation tank 30 at a specific speed, so that the liquid flows slowly and uniformly, undergoes deep reaction nucleation, and gradually flocculates and the crystal nuclei grow.

[0049] In this embodiment, the bottom of the overflow pipe 40 extends below the liquid level of the dissolution reaction tank 10, and the top is communicated with the overflow port 401, so that the preliminary reaction wastewater in the dissolution reaction tank 10 rises from the bottom of the overflow pipe 40 and is discharged into the reaction flocculation tank 30 from the overflow port 401. It should be noted that the desulfurization wastewater that has been fully homogenized, dissolved and preliminarily reacted in the dissolution reaction tank 10 rises along the riser pipe of the overflow pipe 40 from the bottom of the dissolution reaction tank 10 and is discharged into the reaction flocculation tank 30 from the overflow port 401. The overflow pipe 40 is made of a specific material and has a specific liquid level insertion depth to ensure that the material liquid in the pipe has a specific flow rate and can avoid scaling and blockage in the pipe.

[0050] Further, a pH meter 16 is provided at the top of the dissolution reaction tank 10. The pH meter 16 is located inside the overflow pipe 40 and the bottom extends below the liquid level to monitor the pH of the material liquid in real time online.

[0051] In this embodiment, the liquid level gauge 50 is a radar liquid level gauge, which is provided at the top of the reaction flocculation tank 30 and is used to monitor the liquid level value of the reaction flocculation tank 30 in real time. Thus, after accurately measuring the liquid level value in the tank, it is transmitted to the control system. Among them, the variable frequency transfer pump 60 is communicated with the material liquid discharge port 31 and is used to perform variable frequency adjustment according to the liquid level value monitored by the liquid level gauge 50 to control its own output flow rate.

[0052] Specifically, the liquid level control value of the reaction flocculation tank 30 can be set in the control system, and it is compared with the real-time liquid level signal measured by the liquid level gauge 50. The control system outputs a frequency signal for real-time tracking and adjustment to the variable frequency transfer pump 60, so as to ensure that the wastewater with different influent flow rates can reach the predetermined reaction effect at the optimal liquid level in the reaction flocculation tank 30, and at the same time achieve the best energy efficiency ratio.

[0053] The implementation principle and steps of the present utility model are as follows:

[0054] (1) The desulfurization wastewater containing high concentrations of magnesium ions and sulfate ions is sent from the inlet pipe 11 to the dissolution reaction tank 10 by a pump. At the same time, a path of wastewater is led out from the inlet pipe 11 to each spray head 15 to form a three-layer water curtain to remove dust from the dust-containing gas passing through the connecting pipe 14;

[0055] (2) The hydrated lime powder in the hydrated lime silo 21 is sent into the dissolution reaction tank 10 from the powder feeding port 12 after being dynamically adjusted in real time by the feeding pipe 22 and the screw conveyor 24. Under the agitation of the variable frequency mixer 13 at a specific rotation speed, the hydrated lime powder is fully mixed with the wastewater, completely dissolved, and preliminarily reacts with the magnesium ions and sulfate ions in the wastewater to generate crystal nuclei. The reaction chemical formula is as follows:

[0056] Mg 2+ +2OH - →Mg(OH)2↓, SO42- +Ca 2+ →CaSO4↓

[0057] (3) The feed liquid is circulated, stirred and reacted in the dissolution reaction tank 10. After the set residence time is met, the feed liquid overflows to the reaction flocculation tank 30 through the overflow pipe 40 after the preset reaction degree is determined by the remote control system based on the real-time pH value measured by the pH meter 16;

[0058] (4) The feed liquid is stirred at a moderate stirring speed by a fixed-frequency flocculation stirrer 34 in the reaction flocculation tank 30, and the reaction is gradually completed, and the crystal nuclei further grow; after a set amount of flocculant and coagulant are added at the flocculant filling port 32 and the coagulant aid filling port 33, respectively, the crystal seeds of magnesium hydroxide and calcium sulfate gradually gather into flocs;

[0059] (5) The slurry that has reached the set reaction degree is discharged through the slurry discharge port 31; the control system sets the liquid level control value of the reaction flocculation tank 30, and feeds back and compares it with the real-time liquid level signal measured by the radar level meter 50. The control system outputs a real-time tracking and adjusted frequency signal to the variable frequency feed pump 60, thereby ensuring that wastewater with different water inlet flow rates can achieve the predetermined reaction effect at the optimal liquid level in the reaction flocculation tank 30, while achieving the best energy efficiency ratio.

[0060] In summary, the online addition of slaked lime powder and efficient magnesium removal desulfurization reaction device provided by the utility model has a simple process, orderly component structure combination, and a wide range of adaptability of the overall device processing capacity. It can solve the difficulties and pain points of the existing industry's three-box treatment process that can only treat desulfurization wastewater with low concentrations of magnesium ions, low concentrations of sulfate ions and low concentrations of suspended solids, and also solve the problem of low automation in the existing technology. Compared with the existing three-box treatment process, the removal capacity of magnesium ions and sulfate ions can be increased by 3-5 times, which can meet the water quality of desulfurization wastewater generated under all operating conditions of domestic coal-fired power plants; therefore, the utility model is not only suitable for the field of desulfurization wastewater in coal-fired power plants, but also suitable for other industrial wastewater treatment fields.

[0061] The present invention is not limited to what is described in the specification and implementation modes, and therefore, additional advantages and modifications can be easily realized by those familiar with the art. Therefore, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrative examples shown and described herein.

Claims

1. An online feeding device for hydrated lime powder and an efficient magnesium removal and desulfurization reaction device, characterized in that, Comprising: A dissolution reaction tank, which is a closed box body, and a water inlet pipe and a powder feeding port are provided on one side of the top; The water inlet pipe is used to supply the original wastewater into the dissolution reaction tank; A slaked lime feeding assembly, which is used to feed slaked lime powder into the dissolution reaction tank through the powder feeding port; A reaction and flocculation tank, which is an open-top box body, is arranged adjacent to the dissolution reaction tank and is communicated through an overflow port; a liquid discharge port is provided at the bottom of the reaction and flocculation tank, and a flocculant injection port and a coagulant aid injection port are provided at the top; An overflow pipe, the bottom of which extends below the liquid level of the dissolution reaction tank and the top of which is communicated with the overflow port, so that the preliminary reaction wastewater in the dissolution reaction tank rises from the bottom of the overflow pipe and is discharged into the reaction and flocculation tank through the overflow port; A liquid level gauge, which is arranged at the top of the reaction and flocculation tank and is used to monitor the liquid level value of the reaction and flocculation tank in real time; A variable-frequency transfer pump, which is communicated with the liquid discharge port and is used to perform variable-frequency adjustment according to the liquid level value monitored by the liquid level gauge to control its own output flow rate.

2. The hydrated lime powder on-line dosing and high-efficiency magnesium removal and desulfurization reaction device according to claim 1, characterized in that, A variable-frequency mixer is arranged in the dissolution reaction tank, and the variable-frequency mixer is used to stir to fully mix the original wastewater and the slaked lime powder.

3. The hydrated lime powder online dosing and high-efficiency magnesium removal and desulfurization reaction device according to claim 2, characterized in that A fixed-frequency flocculation mixer is arranged in the reaction and flocculation tank.

4. The hydrated lime powder online dosing and high-efficiency magnesium removal and desulfurization reaction device according to claim 1, characterized in that, A connecting pipe is further provided at the top of the dissolution reaction tank, and the connecting pipe is respectively used to connect the inside of the dissolution reaction tank with the outside; a plurality of spray heads are arranged in the connecting pipe and are all communicated with the water inlet pipe, and the spray heads are used to spray a water curtain formed by the original wastewater into the dissolution reaction tank.

5. The hydrated lime powder online dosing and high-efficiency magnesium removal and desulfurization reaction device according to claim 1, characterized in that, The side walls of the reaction and flocculation tank and the dissolution reaction tank that are close to each other are designed for reuse. The volume V1 of the dissolution reaction tank = Q × T1, where Q is the preset maximum wastewater flow rate and T1 is the residence time of the wastewater in the dissolution reaction tank; The volume V2 of the reaction and flocculation tank = Q × T2, where T2 is the residence time of the wastewater in the reaction and flocculation tank.

6. The hydrated lime powder on-line dosing and high-efficiency magnesium removal and desulfurization reaction device according to claim 1, characterized in that, The slaked lime feeding assembly includes a slaked lime silo, a feeding pipe arranged below the slaked lime silo, a first plug valve arranged on the feeding pipe, a screw conveyor communicated with the bottom of the feeding pipe, and a discharging pipe communicated between the side of the screw conveyor far from the feeding pipe and the powder feeding port; the first plug valve is used to open or close the feeding pipe; the screw conveyor is used to continuously convey the slaked lime powder falling from the feeding pipe into the discharging pipe.

7. The hydrated lime powder on-line dosing and high-efficiency magnesium removal and desulfurization reaction device according to claim 6, characterized in that, A powder silo vibrating motor is arranged at a preset position on the bottom side of the slaked lime silo, and the powder silo vibrating motor is used to break the arch when the slaked lime powder in the slaked lime silo bridges.

8. The hydrated lime powder on-line dosing and high-efficiency magnesium removal and desulfurization reaction device according to claim 6, characterized in that, A variable-frequency weighing feeder is further arranged at the position of the feeding pipe below the first plug valve to adjust and weigh the amount of slaked lime powder discharged from the feeding pipe.

9. The hydrated lime powder online dosing and high-efficiency magnesium removal and desulfurization reaction device according to claim 6, characterized in that, A second plug valve is further arranged on the discharging pipe, and the second plug valve is used to open or cut off the discharging pipe.

10. The hydrated lime powder online dosing and high-efficiency magnesium removal and desulfurization reaction device according to claim 1, characterized in that, A pH meter is arranged at the top of the dissolution reaction tank, and the pH meter is located in the overflow pipe and the bottom extends below the liquid level.

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