A system and process for eliminating gypsum buildup in the central area of ​​a large-diameter absorber slurry pool.

Abstract

This invention discloses a system and method for eliminating gypsum accumulation in the central region of a slurry pool in a large-diameter absorber tower. A bottom conical hopper collects the sprayed slurry, creating potential energy. The collected slurry flows rapidly down through a guide throat, impacting guide vanes. Under the guidance of the guide vanes, the slurry forms a swirling flow. This swirling slurry, guided by a diffuser, flows obliquely downwards. In conjunction with a side-entry agitator assembly, this eliminates the gypsum suspension dead zones in the central and bottom regions of the absorber tower's slurry pool. This system utilizes the potential energy of the entire circulating slurry and the downward impact kinetic energy, effectively working in conjunction with a side-entry agitator, to solve the problem of gypsum accumulation in the central region of the slurry pool. Through this system and process, the entire bottom slurry pool of the absorber tower is suspended.

Description

Technical Field

[0001] This invention belongs to the field of wet desulfurization technology, specifically relating to a system and method for eliminating gypsum accumulation in the central area of ​​the slurry pool of a large-diameter absorption tower. This system and method can eliminate the suspended dead zone in the central area of ​​the absorption tower slurry pool, fundamentally solving the problem of gypsum accumulation. Background Technology

[0002] The statements herein provide only background information in relation to this invention and do not necessarily constitute prior art.

[0003] In the field of wet desulfurization, the limestone / lime-gypsum desulfurization process has become the preferred desulfurization technology for most industrial enterprises due to its abundant raw material supply and high desulfurization efficiency. For decades, this desulfurization process has been the mainstream technology in industrial air pollution control, with a market coverage rate exceeding 90%. The core equipment of the limestone / lime-gypsum desulfurization process is the absorption tower. Since the byproduct of the limestone / lime-gypsum process is gypsum (CaSO4·2H2O) particles, which have a relatively high specific gravity, these particles tend to deposit easily in the slurry pool at the bottom of the absorption tower, especially in the central suspended dead zone. This accumulation significantly reduces the actual usable volume of the slurry pool, and in severe cases, renders the absorption tower unable to operate normally.

[0004] The existing solutions to this problem are mainly the following two:

[0005] (1) By setting one or more side-entry agitators around the slurry pool at the bottom of the absorption tower, and arranging them evenly, a certain angle of rotational force and downward liquid pushing force are generated, so that the slurry inside the absorption tower rotates in an overall circumferential manner and generates a certain suspension force at the same time, so as to prevent gypsum deposition at the bottom of the absorption tower.

[0006] (2) A dedicated pulse suspension system is added. A high-flow pulse suspension pump is used to cause strong vertical disturbance of the slurry in the tower throughout the entire cross-section, thereby preventing gypsum deposition in any area at the bottom of the absorption tower.

[0007] Absorption towers typically have a diameter of 4-20m. For large-diameter absorption towers (e.g., greater than 10m), the output power and effective range of a side-entry agitator are far from sufficient to deliver driving force deep into the central area of ​​the slurry tank. In reality, the central area of ​​the slurry tank in an absorption tower is essentially a suspended dead zone, where solid materials such as gypsum in the slurry easily deposit and accumulate. As the absorption tower continues to operate, the gypsum buildup in the central area of ​​the slurry tank becomes increasingly severe, requiring a lengthy cleaning process, which is detrimental to shortening maintenance cycles and quickly restoring production.

[0008] Adding a pulse suspension system has also proven ineffective. The pulse nozzles have a limited effective area, and gypsum deposition remains a problem around the absorber and outside the nozzles. The pulse suspension pump is not only large, occupying valuable space around the absorber, but also consumes a significant amount of power and energy. Furthermore, the pulse suspension pipes and nozzles experience severe wear, resulting in low process reliability. If a problem occurs with the pulse suspension pipes or nozzles, slurry deposits will immediately form in the absorber slurry pool, preventing normal operation. Summary of the Invention

[0009] The absorber tower contains a massive amount of circulating slurry flowing up and down, containing enormous potential and impact energy that remains untapped. The circulating slurry is drawn from the bottom of the absorber tower, pressurized by a circulating pump, and lifted to the top spray layer. It then sprays downwards, uniformly and dispersedly falling back into the slurry pool as slurry particles. However, its high-level potential energy and the impact kinetic energy generated during the downward fall are wasted. The term "massive amount of circulating slurry" refers to the total flow rate of the circulating slurry within the absorber tower. Since wet desulfurization processes typically use multiple circulating pumps for spraying within the tower, the liquid-to-gas ratio during operation can reach 10-30 L / Nm³. 3 Therefore, the sum of the flow rates of all circulating pumps is enormous, reaching or exceeding dozens of times the total liquid pushing volume of all side-entry agitators in the absorption tower. Faced with such a massive volume of circulating slurry, if effective processes and methods are adopted to utilize the potential energy of the liquid level and the kinetic energy of the downward impact within the circulating slurry to a certain extent, allowing it to synergize with the side-entry agitators, sufficient stirring and suspension energy will be provided to the slurry pool at the bottom of the absorption tower. This will completely solve the problem of gypsum deposition at the bottom of the absorption tower slurry pool.

[0010] To address the shortcomings of existing technologies, the present invention aims to provide a system and method for eliminating gypsum accumulation in the central region of the slurry pool of a large-diameter absorber. This system utilizes the potential energy of the liquid level and the kinetic energy of the downward impact of the entire circulating slurry, in effective coordination with a side-entry agitator, to solve the problem of gypsum accumulation in the central region of the slurry pool. Through this system and process, the entire slurry pool at the bottom of the absorber is suspended.

[0011] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0012] In a first aspect, the present invention provides a system for eliminating gypsum buildup in the central region of a slurry pool in a large-diameter absorption tower, comprising a tower body, a bottom cone, a guide vane assembly, and a side-entry agitator assembly, wherein the bottom cone is mounted on the side wall at the bottom of the tower body via its large-diameter end, and the small-diameter end of the bottom cone is connected to the small-diameter end of the diffuser via a guide throat.

[0013] The guide vane assembly is radially fixed to the bottom of the tower body via the central axis, in a fan shape, and located inside the diffuser opening;

[0014] The side-entry agitator is installed on the bottom side wall of the tower body, and its direction of propulsion of the slurry is the same as the swirling direction of the guide vanes;

[0015] The bottom cone collects the sprayed slurry, creating potential energy at the liquid level. The collected slurry flows rapidly down through the guide throat, impacting the guide vanes. Under the guidance of the guide vanes, the slurry forms a swirling flow. The swirling slurry then flows obliquely downwards under the guidance of the diffuser, working in conjunction with the side-entry agitator assembly to eliminate the gypsum suspension dead zones in the central and bottom areas of the slurry pool of the absorption tower.

[0016] When the circulating sprayed slurry falls in droplet form, it does not generate a strong mechanical impact force. The system first uses a bottom conical hopper to collect the massive amount of circulating slurry sprayed from the top of the absorption tower, gathering it above the bottom conical hopper. Driven by the potential energy of the liquid level, this slurry naturally flows downwards through the bottom conical hopper, guide throat, guide vanes, and diffuser. These components are all positioned directly above the central area of ​​the slurry pool, facing this key area where potential gypsum accumulation may occur. Due to the small diameter of the guide throat, the flowing slurry is accelerated, generating a considerable mechanical impact force. Considering the enormous volume of circulating slurry, this mechanical impact force is quite significant. The accelerated slurry then surges downwards and outwards through the diffuser in a "surfing" motion, creating a strong suspension and agitation effect throughout the entire bottom area.

[0017] The guide throat is also equipped with guide vanes, which generate a certain lateral rotational force on the downward-impacting slurry. The direction of this lateral rotational force is consistent with the propulsion direction of the side-entry agitator. This creates a synergistic effect in the slurry pool in terms of rotational flow. Specifically, the slurry gushing from the diffuser flows laterally and diagonally downwards in the same direction as the slurry propelled by the surrounding side-entry agitators, forming an overall unidirectional rotational driving force for the slurry at the bottom of the tower, thus significantly improving the overall suspension state. The downward-diagonal slurry gushing from the diffuser has a good impact effect on the bottom of the tower, which can further prevent gypsum settling.

[0018] Therefore, the system of the present invention can not only overcome the problem of gypsum accumulation due to insufficient levitation power in the central area, but also significantly improve the suspension level in the bottom area of ​​the entire absorption tower slurry pool.

[0019] After the system of this invention is put into operation, it transforms the unfavorable situation of relying solely on the kinetic energy of the liquid pushing from the side-entry agitator for suspension into a favorable situation where the liquid potential energy of the massive circulating slurry generates downward and lateral rotational impacts from the central region of the absorption tower, while the agitator generates lateral rotational thrust from the sidewall region of the absorption tower. These two factors work together to achieve suspension. This situation ensures that there are no more dead zones in the entire bottom area of ​​the absorption tower slurry pool.

[0020] The suspension process of this invention utilizes the impact kinetic energy derived from the potential energy of the circulating slurry. The fundamental source of this energy is the driving force of the existing circulating pump. Therefore, the suspension process of this invention does not require the injection of new or additional mechanical kinetic energy during operation, which conforms to the principle of energy conservation and consumption reduction.

[0021] All components of the system are fixedly installed, and the guide vanes do not rotate, which can improve the overall reliability and service life and ensure long-term stable operation.

[0022] In some embodiments, the ratio of the flow guide throat to the inner diameter of the tower body is 1:5-10. Using a flow guide throat within this ratio range allows for effective collection of the circulating sprayed slurry and provides better acceleration, resulting in a greater impact force.

[0023] In some embodiments, a liquid storage cylinder is formed between the top of the bottom cone and the tower body, and the volume of the liquid storage cylinder is 1 / 3 to 1 / 2 of the volume of the slurry pool.

[0024] Preferably, the inclination angle of the sidewall of the bottom cone is 50°-75°.

[0025] In some embodiments, a wear-resistant ceramic plate is disposed below the guide vanes. The wear-resistant ceramic plate is installed at the bottom of the tower body, below the diffuser, and its diameter is at least larger than the diameter of the large diameter end of the diffuser.

[0026] Preferably, the area of ​​the wear-resistant ceramic plate is not less than 4-10 times the cross-sectional area of ​​the flow throat. Because the swirling slurry flowing down from the diffuser has a high flow velocity and carries a large number of solid particles, it generates strong friction on the bottom of the tower. Installing a wear-resistant ceramic plate at this location effectively protects the bottom of the tower.

[0027] Preferably, the thickness of the wear-resistant ceramic plate is 10-20mm.

[0028] In some embodiments, the tower body and the bottom cone are made of corrosion-resistant material with a thickness of 6-20 mm. The surfaces of the tower body and the bottom cone are smooth.

[0029] Preferably, the bottom cone is supported by reinforcing ribs and a supporting structure to ensure sufficient load-bearing capacity.

[0030] In some embodiments, the diameter ratio of the central shaft to the guide throat is 1:0.2-0.5. The central shaft should have sufficient supporting strength to withstand the liquid flow impact force transmitted by the rotating guide blades; the central shaft will be made of corrosion-resistant and wear-resistant materials.

[0031] The guide vanes will generate a lateral rotational force on the slurry flowing at the guide throat, so that the slurry flows both downward impactfully and with a certain degree of lateral rotation.

[0032] The initial velocity of the rotational flow generated by the guide vanes is basically the same as the initial flow velocity driven by the rotation of the lateral agitator installed on the wall of the absorption tower.

[0033] In some embodiments, the number of guide vanes is 4-8, and the tilt angle of each vane is 30°-55°.

[0034] Preferably, the thickness of the guide vanes is 10-30mm. The guide vanes are made of corrosion-resistant and wear-resistant materials, with a thickness controlled between 10-30mm, and have sufficient impact resistance and service life.

[0035] In some embodiments, the ratio of the distance between the diffuser and the bottom plate of the tower to the diameter of the throat is 1:0.5-1.5.

[0036] In some embodiments, the bottom of the tower body is connected to the spray layer at the top of the tower body via a slurry circulation pipe and a slurry circulation pump, and the connection position of the slurry circulation pipe to the tower body is higher than the installation position of the side-entry agitator.

[0037] Secondly, the present invention provides a method for eliminating gypsum buildup in the central region of a slurry pool in a large-diameter absorption tower, comprising the following steps:

[0038] The bottom cone collects the slurry from the circulating spray and forms a liquid level above the bottom cone, creating potential energy at the liquid level.

[0039] The collected slurry is accelerated as it flows through the guide throat, and after flowing through the guide vanes, it forms a swirling flow under the guidance of the guide vanes.

[0040] The swirling slurry, guided by the diffuser, forms a downward-sloping swirling fluid that impacts and suspends the slurry at the bottom of the tower, thus eliminating the gypsum suspension dead zone at the bottom of the tower together with the side-entry agitator.

[0041] In some embodiments, the slurry flow rate at the guide throat is 1-2.5 m / s.

[0042] The beneficial effects achieved by one or more embodiments of the present invention described above are as follows:

[0043] This invention first uses a bottom conical bucket to concentrate all the circulating slurry that is sprayed down, forming a certain liquid potential energy. Then it is released downward from the central area of ​​the slurry pool, giving it a huge impact energy on the bottom of the central area. In addition, the guide vanes at the throat give the slurry a certain lateral rotational force, thereby completely eliminating the gypsum suspension dead zone in the central area and the entire bottom area, and fundamentally solving the problem of gypsum deposition.

[0044] It has a good rotational synergy effect with the side-entry agitator, and can also reduce the power requirement of the side-entry agitator to a certain extent;

[0045] The system utilizes the potential energy of the circulating slurry that was previously wasted, resulting in no additional energy consumption throughout the entire system and operation.

[0046] All components of the system are fixed, with no moving parts, ensuring stable and reliable operation. Attached Figure Description

[0047] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0048] Figure 1 This is a schematic diagram of the overall structure of the system for eliminating gypsum accumulation in the central area of ​​the slurry pool of the absorption tower according to an embodiment of the present invention;

[0049] Figure 2 This is an enlarged view of the working area in an embodiment of the present invention;

[0050] Figure 3 This is a system cross-sectional view of the working area in an embodiment of the present invention;

[0051] Figure 4 This is a schematic diagram of the structure of the rotating guide vane according to an embodiment of the present invention.

[0052] Among them, 1-storage cylinder; 2-side-entry agitator; 3-slurry circulation pump; 4-slurry circulation pipe; 5-spray pipe; 6-bottom cone; 7-guide throat; 8-diffuser; 9-guide vane; 10-central shaft; 11-wear-resistant ceramic plate. Detailed Implementation

[0053] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0054] The present invention will be further described below with reference to the embodiments.

[0055] like Figure 1 and Figure 2 As shown, a system for eliminating gypsum buildup in the central area of ​​a slurry pool in a large-diameter absorption tower includes a tower body, a bottom conical hopper 6, a guide vane 9 assembly, and a side-entry agitator 2 assembly. The bottom conical hopper 6 is mounted on the side wall of the bottom of the tower body through its large-diameter end, and the small-diameter end of the bottom conical hopper 6 is connected to the small-diameter end of the diffuser 8 through a guide throat 7. A liquid storage cylinder is formed between the top of the bottom conical hopper and the tower body, and the volume of the liquid storage cylinder is 1 / 3 to 1 / 2 of the volume of the slurry pool. The inclination angle of the side wall of the bottom conical hopper 6 is 50° to 75°.

[0056] The guide vane 9 components are radially fixed to the bottom of the tower body via the central axis, in a fan shape, and located inside the diffuser opening;

[0057] A wear-resistant ceramic plate 11 is installed below the guide vane 9. The wear-resistant ceramic plate 11 is installed at the bottom of the tower body, below the diffuser 8, and its diameter is at least larger than the diameter of the large diameter end of the diffuser 8. The area of ​​the wear-resistant ceramic plate 11 is not less than 4-10 times the cross-sectional area of ​​the guide throat 7. The thickness of the wear-resistant ceramic plate 11 is 10-20mm.

[0058] The side-entry agitator 2 is installed on the bottom side wall of the tower body, and its direction of propulsion of the slurry is the same as the swirling direction of the guide vane 9;

[0059] The bottom cone 6 collects the sprayed slurry, forming a potential energy level. The collected slurry flows down rapidly through the guide throat 7, impacting the guide vanes 9. Under the guidance of the guide vanes 9, the slurry forms a swirling flow. The swirling slurry then swirls downwards under the guidance of the diffuser 8, working in conjunction with the side-entry agitator 2 to eliminate the gypsum suspension dead zone in the center and bottom areas of the slurry pool of the absorption tower.

[0060] The bottom of the tower body is connected to the spray layer at the top of the tower body through the slurry circulation pipe 4 and the slurry circulation pump 3. The connection position of the slurry circulation pipe 4 to the tower body is higher than the installation position of the side-entry agitator 2.

[0061] The tower body and the bottom cone 6 are both made of corrosion-resistant material with a thickness of 6-20mm; the bottom cone 6 is supported by reinforcing ribs and a supporting structure.

[0062] The diameter ratio of the central shaft 10 to the flow guide throat 7 is 1:0.2-0.5.

[0063] The number of guide vanes 9 is 4-8, and the tilt angle of each vane is 30°-55°; the thickness of the guide vanes is 10-30mm.

[0064] The ratio of the distance between the diffuser 8 and the bottom plate of the tower to the diameter of the throat is 1:0.5-1.5.

[0065] The system for eliminating gypsum buildup in the central area of ​​a large-diameter absorber slurry pool consists of three processes, as shown below:

[0066] The first process is the collection process, which involves collecting the massive amount of circulating slurry that falls naturally after the gas-liquid reaction in the absorption tower into the storage tank, accumulating a certain level of liquid potential energy.

[0067] The volume of the storage cylinder is controlled within the range of 1 / 3 to 1 / 2 of the volume of the slurry tank;

[0068] The upper cross section of the storage cylinder is the same as the cross section of the slurry pool in the absorption tower. This means that the storage cylinder can completely seal off the downward flow of the circulating slurry, so that all the slurry can only be released downward in a "concentrated" manner through the guide throat, guide rotating blades, and central shaft at the bottom of the storage cylinder, thereby forming a certain downward potential energy impact. Instead of directly entering the bottom of the slurry pool as droplets in the original way, the droplet-dispersed slurry would not have any downward mechanical impact force.

[0069] The second process is the falling and rotating process of the circulating slurry. When the massive circulating slurry flows downward through the bottom cone and the guide throat, it is stirred by the central shaft and the rotating guide blades set at the throat, resulting in a certain degree of lateral rotation.

[0070] The aforementioned flow guide throat refers to the constricted section of the pipe connected to the bottom cone. The flow velocity of the slurry will increase significantly in this section of the pipe, thus generating a certain degree of downward impact force.

[0071] The slurry flow velocity at the guide throat is controlled within the range of 1-2.5 m / s;

[0072] The length of the guide throat should be controlled within the range of 1-4 times the diameter.

[0073] The third process, the release process, involves the massive circulating slurry flowing through the central shaft and the rotating guide vanes. This generates a significant vertical impact force downwards, while simultaneously producing a certain rotational force under the action of the guide vanes. The slurry then surges outwards towards the diffuser, where it interacts with the side-mounted agitator installed on the tower wall, creating a synergistic rotational effect that generates a powerful suspending force on the slurry at the bottom of the tower. This ensures overall suspension at the bottom of the absorber slurry pool, eliminating any dead zones. To prevent rapid wear on the bottom plate directly below the diffuser, a wear-resistant ceramic plate will be laid at this location.

[0074] The process flow of this invention is described below:

[0075] The circulating slurry in the absorption tower, after being sprayed into the tower through the circulating pump group, circulating pipe group, and spray pipe group, falls downward into the storage cylinder 1. It flows through the bottom cone 6 and the guide throat 7, where, under the action of the guide vanes 9 and the central shaft 10, it generates a downward impact flow and a certain degree of lateral rotational flow. The direction of this lateral rotational flow is consistent with the direction in which the agitator pushes the slurry. Then, the circulating slurry passes through the diffuser 8 and enters the bottom slurry pool, where it is again drawn into the circulating pipe group and spray pipe group by the circulating pump group, undergoing reciprocating up-and-down circulation.

[0076] Among them, the diffuser 8 is connected to the lower part of the slurry pool of the absorption tower;

[0077] The flow of circulating slurry has changed from its original disordered dispersion to being collected by the storage cylinder and then released from the diffuser. This completely changes the flow field at the bottom of the slurry pool of the absorption tower. Combined with the rotation of the side-entry agitator, it forms a complete and effective slurry suspension system with no dead zones at the bottom of the absorption tower.

[0078] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A system for eliminating gypsum buildup in the center region of a large diameter absorber slurry pond, characterized by: The tower body, the bottom cone, the guide vane assembly and the side-in type agitator assembly are provided, wherein the bottom cone is installed on the sidewall of the bottom of the tower body through the large-diameter end, and the small-diameter end of the bottom cone is connected with the small-diameter end of the diffusion port through the guide throat; The guide vane assembly is radially fixedly installed on the bottom of the tower body through the center shaft, is in the form of a fan, and is located inside the diffusion port, the number of the guide vanes is 4-8, the inclination angle of the vane is 30-55°, the thickness of the guide vane is 10-30 mm, and the guide vane is made of corrosion-resistant and wear-resistant material; The side-in type agitator is installed on the sidewall of the bottom of the tower body, and the pushing direction of the slurry is the same as the cyclone direction of the guide vane; The bottom cone collects the sprayed slurry to form a liquid level potential energy, the collected slurry rapidly flows down through the guide throat, impacts the guide vane, and forms a cyclone under the guide action of the guide vane, the cyclone slurry forms a flow towards the obliquely downward under the guide action of the diffusion port, cooperates with the side-in type agitator assembly, and eliminates the gypsum suspension dead zone in the central region and the bottom region of the slurry pool of the absorption tower; The ratio of the guide throat to the inner diameter of the tower body is 1:5-10.

2. The system for eliminating gypsum buildup in the center region of a large diameter absorber slurry pond of claim 1, wherein: The upper portion of the bottom cone and the tower body form a liquid storage cylinder, and the volume of the liquid storage cylinder is 1 / 3-1 / 2 of the volume of the slurry pool.

3. The system for eliminating gypsum buildup in the center region of a large diameter absorption column slurry pool of claim 1, wherein, The inclination angle of the sidewall of the bottom cone is 50-75°.

4. The system for eliminating gypsum buildup in the center region of a large diameter absorption column slurry pool of claim 1, wherein: The lower portion of the guide vane is provided with a wear-resistant ceramic plate, the wear-resistant ceramic plate is installed on the bottom of the tower body, is located below the diffusion port, and has a diameter greater than that of the large-diameter end of the diffusion port.

5. The system for eliminating gypsum buildup in the center region of a large diameter absorption column slurry pool of claim 4, wherein, The area of the wear-resistant ceramic plate is not less than 4-10 times the cross-sectional area of the guide throat.

6. The system for eliminating gypsum buildup in the center region of a large diameter absorption column slurry pool of claim 4, wherein, The thickness of the wear-resistant ceramic plate is 10-20 mm.

7. The system of claim 1, wherein: The materials of the tower body and the bottom cone are corrosion-resistant materials, and the thickness is 6-20 mm.

8. The system of claim 1, wherein, The bottom cone is supported by reinforcing ribs and support structures.

9. The system of claim 1, wherein, The ratio of the center shaft to the diameter of the guide throat is 1:0.2-0.

5.

10. The system of claim 1, wherein: The ratio of the distance from the diffusion port to the tower bottom plate to the diameter of the guide throat is 1:0.5-1.

5.

11. The system of claim 1, wherein: The bottom of the tower body is connected with the spraying layer at the top of the tower body through a slurry circulation pipe and a slurry circulation pump, and the connection position of the slurry circulation pipe with the tower body is higher than the installation position of the side-in type agitator.

12. A method of eliminating gypsum buildup in the center region of a large diameter absorber slurry pond characterized by: The method comprises the following steps: The bottom cone collects the circulating sprayed slurry, and forms a liquid level above the bottom cone to form a liquid level potential energy; The collected slurry is accelerated during the flow through the guide throat, and forms a cyclone under the guide action of the guide vane after flowing through the guide vane; The cyclone slurry forms a flow towards the obliquely downward under the guide action of the diffusion port, has an impact and suspension effect on the slurry at the bottom of the tower, and eliminates the gypsum suspension dead zone at the bottom of the tower together with the side-in type agitator.

13. The method of eliminating gypsum buildup in the center region of a large diameter absorber slurry pond of claim 12, wherein: The slurry flow rate of the guide throat is 1-2.5 m / s.

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