Pulping tank for wet desulphurization system

Abstract

The utility model provides a slurrying tank for a wet desulphurization system, and relates to the technical field of slurry storage tanks, the slurrying tank comprises a tank body, a stirring assembly is arranged in the tank body, a driving motor for driving the stirring assembly to rotate is arranged at the top of the tank body, the stirring assembly comprises a rotating shaft, a scraping plate and a turbine, and the rotating shaft is rotatably arranged in the tank body; the upper end of the rotating shaft extends out of the tank body and is connected with an output shaft of the driving motor, the scraper is fixedly arranged at the bottom of the rotating shaft, the lower end of the scraper abuts against the inner bottom of the tank body, the two ends of the scraper abut against the inner wall of the tank body, and the turbine is fixedly arranged on the rotating shaft and located above the scraper. The turbine can generate strong radial flow under the driving of the rotating shaft, so that slurry at different positions in the tank is rapidly mixed, dispersion and dissolution of solid particles are accelerated, the slurry making efficiency is improved, meanwhile, the scraper can scrape sediments at the joint of the tank bottom and the tank wall, formation of a local dead zone is avoided, accumulation of the solid particles is prevented, and the slurry making efficiency is improved. The uniformity of the pulp is further improved, and the pulping quality is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of slurry storage tanks, in particular to a pulp preparation tank for a wet desulfurization system. BACKGROUND

[0002] A wet desulfurization system is a flue gas desulfurization technology widely used in the industrial field. Its working principle is that SO2 in waste gas reacts with alkaline substances in a desulfurizing agent to generate sulfite. For example, limestone slurry reacts with SO2 to generate calcium sulfite (CaSO3). Calcium sulfite is oxidized to calcium sulfate (CaSO4, i.e., gypsum) under the action of an oxidation system. After a series of treatments, the purified waste gas is discharged from the top of the absorption tower, and the generated gypsum is treated by a dewatering system.

[0003] A wet desulfurization system for cement kiln flue gas purification is disclosed in Chinese Patent No. CN215842484U, which includes a desulfurization tower connected to the cement kiln flue gas discharge port through a flue gas pipeline, a bag-type dust collector arranged on the flue gas pipeline, a dust collection zipper machine arranged below the dust outlet of the bag-type dust collector, a pulp preparation tank connected to the dust collection zipper machine through a dust conveying pipeline, and a stirring device arranged in the pulp preparation tank. The desulfurization tower includes a tower body, a flue gas inlet arranged in the middle of the tower body, a flue gas outlet arranged at the top of the tower body, a slurry inlet arranged at the lower part of the tower body, and a plurality of side stirrers arranged in the tower body from bottom to top. A plurality of layers of spray devices and mist eliminators are arranged in the upper part of the tower body. A flue gas flow guide ring is arranged below each layer of spray devices. The flue gas flow guide ring includes a ring-shaped vertical plate fixedly arranged on the inner wall of the tower body, and a ring-shaped inclined plate integrally connected with the ring-shaped vertical plate. The inner side end of the ring-shaped inclined plate is lower than the outer side end. The pulp preparation tank is connected to the slurry inlet through a first slurry pipeline. The utility model sets a flue gas flow guide ring below the spray device. When the flue gas moving upwards along the side wall of the tower body reaches the flue gas flow guide ring, it is bent and guided to the inside of the tower body along the flue gas flow guide ring, thereby increasing the contact area of the flue gas and the spray liquid and improving the treatment effect of the flue gas. In addition, due to the arrangement of the flue gas flow guide ring, the spray nozzles can be arranged more inwardly, away from the side wall of the tower body (reducing the distance between the outermost spray nozzle and the inner wall of the tower body), thereby reducing the erosion of the spray liquid on the side wall of the tower body. In addition, the ring-shaped vertical plate of the ring-shaped flow guide ring can also protect the side wall of the tower body to a certain extent, avoiding the erosion of the spray liquid on the side wall of the tower body. The utility model returns the liquid discharged from the overflow port of the cyclone and the liquid discharged from the gas-liquid separator to the desulfurization tower for reuse, thereby improving the utilization rate of water and saving water resources.

[0004] However, the pulping tank in the wet desulfurization system above relies on the stirring device alone to stir the pulping tank, and in actual use, the stirring range and intensity of the existing stirrer are limited, the flowability of the slurry is poor at the joint of the tank bottom and the tank wall and other positions, and local dead zones are easily formed, solid particles (such as lime or limestone powder) in the area cannot be fully suspended, resulting in uneven concentration and affecting the pulping quality. SUMMARY

[0005] The purpose of the embodiments of the present application is to provide a pulping tank for a wet desulfurization system, which can solve the technical problems raised in the background art.

[0006] The embodiments of the present application provide a pulping tank for a wet desulfurization system, which comprises a tank body, a feed inlet and a water inlet are arranged at the top of the tank body, a slurry discharge port is arranged on one side of the tank body, a stirring assembly is arranged in the tank body, a drive motor is arranged at the top of the tank body to drive the stirring assembly to rotate, the stirring assembly comprises a rotating shaft, a scraper and a turbine, the rotating shaft is rotatably arranged in the tank body, the upper end of the rotating shaft extends out of the tank body and is connected with the output shaft of the drive motor, the scraper is fixedly arranged at the bottom of the rotating shaft, the lower end of the scraper abuts against the inner bottom of the tank body, the two ends of the scraper abut against the inner wall of the tank body, and the turbine is fixedly arranged on the rotating shaft and located above the scraper.

[0007] Further, a plurality of stirring rods are arranged at equal intervals above the turbine on the rotating shaft.

[0008] Further, the scraper is arranged obliquely.

[0009] Further, the included angle between the scraper and the inner bottom of the tank body is 30°-60°.

[0010] Further, a connecting rod is fixedly arranged between two adjacent stirring rods, a roller is movably sleeved on the connecting rod, and the outer surface of the roller is in rolling connection with the inner wall of the tank body.

[0011] Further, an inspection port is arranged at the top of the tank body, and a sealing cover matched with the inspection port is arranged at the inspection port.

[0012] Further, a bearing is arranged at the connection between the rotating shaft and the tank body.

[0013] The beneficial effects of the present application are as follows:

[0014] The turbine can be driven by the rotating shaft to generate powerful radial flow, so that the slurry in the tank is quickly mixed at different positions, the dispersion and dissolution of solid particles are accelerated, the pulping efficiency is improved, meanwhile, the scraper can scrape off the deposits at the joint of the tank bottom and the tank wall, the formation of local dead zones is avoided, the solid particle accumulation is prevented, the uniformity of the slurry is further improved, and the pulping quality is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0016] Figure 1 The structural schematic diagram in some embodiments of the present application is shown in the figure.

[0017] Figure 2 The first cross-sectional view in some embodiments of the present application is shown in the figure.

[0018] Figure 3 The second cross-sectional view in some embodiments of the present application is shown in the figure.

[0019] The reference signs are as follows:

[0020] 1, tank body; 2, feed inlet; 3, water inlet; 4, slurry outlet; 5, stirring assembly; 51, rotating shaft; 52, scraper; 53, turbine; 6, driving motor; 7, stirring rod; 8, connecting rod; 9, roller; 10, inspection port; 11, sealing cover; 12, bearing. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0024] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0026] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances. Specific embodiment:

[0028] like Figures 1-3As shown, the present application provides a pulping tank for wet desulfurization system, comprising a tank body 1, the top of the tank body 1 is provided with a feed inlet 2 and a water inlet 3, one side of the tank body 1 is provided with a slurry discharge port 4, the tank body 1 is provided with a stirring assembly 5, the top of the tank body 1 is provided with a drive motor 6 for driving the stirring assembly 5 to rotate, the stirring assembly 5 comprises a rotating shaft 51, a scraper 52 and a turbine 53, the rotating shaft 51 is rotatably arranged in the tank body 1, the upper end of the rotating shaft 51 extends out of the tank body 1 and is connected with the output shaft of the drive motor 6, the scraper 52 is fixedly arranged on the bottom of the rotating shaft 51, the lower end of the scraper 52 abuts against the inner bottom of the tank body 1, the two ends of the scraper 52 abut against the inner wall of the tank body 1, the turbine 53 is fixedly arranged on the rotating shaft 51 and located above the scraper 52, the rotating shaft 51 is driven to rotate by the drive motor 6, the turbine 53 can generate radial flow under the driving of the rotating shaft 51, so that the slurry in different positions in the tank is quickly mixed, the dispersion and dissolution of solid particles are accelerated, the pulping efficiency is improved, at the same time, the scraper 52 can scrape off the deposits at the junction of the tank bottom and the tank wall, avoid the formation of local dead zones, prevent the accumulation of solid particles, further improve the uniformity of the slurry and ensure the quality of pulping.

[0029] As shown in Figure 2 , a plurality of stirring rods 7 are arranged at equal intervals above the turbine 53 on the rotating shaft 51, in this embodiment, three stirring rods 7 are arranged, the stirring rods 7, together with the turbine 53 and the scraper 52, form a multi-level stirring system, the stirring rods 7 can stir the slurry at different heights, further enhancing the mixing degree of the slurry in the tank, the rotation of the stirring rods 7 can make the slurry produce more flow in the vertical direction, break the possible stratification phenomenon and ensure the uniform distribution of solid particles in the slurry.

[0030] As shown in Figure 2 and Figure 3 , the scraper 52 is arranged obliquely, the scraper 52 can guide the slurry to form a spiral flow at the tank bottom, so that the solid particles are continuously mixed with the liquid during the rising and falling process, accelerating the pulping process, at the same time, the scraper 52 arranged obliquely has a relatively small contact area with the slurry when rotating, thereby reducing the resistance received by the scraper 52.

[0031] As shown in Figure 2 and Figure 3 , the included angle between the scraper 52 and the inner bottom of the tank body 1 is 30°-60°, in this embodiment, the included angle between the scraper 52 and the inner bottom of the tank body 1 is 45°, when the scraper 52 rotates, the scraper 52 will push the slurry to produce an oblique flow, this flow cooperates with the flows generated by the turbine 53 and the stirring rods 7, so that the slurry forms a complex three-dimensional flow state in the tank, for example, the slurry will form a spiral upward flow at the tank bottom, this flow mode can make the solid particles better suspended in the slurry, enhancing the mixing effect between the solid particles and the liquid, which is beneficial to the full reaction of various components in the pulping process and improves the pulping quality.

[0032] As Figure 2 and Figure 3 shown, the connecting rod 8 is fixed between the two adjacent stirring rods 7, and the roller 9 is movably sleeved on the connecting rod 8. The outer surface of the roller 9 is in rolling connection with the inner wall of the tank body 1. The connecting rod 8 fixed between the adjacent stirring rods 7 plays a role in strengthening the structural stability of the stirring rod 7. When the roller 9 rolls on the tank wall, it will produce a certain pushing effect on the slurry near the tank wall. This pushing effect can change the flow state of the slurry near the tank wall, so as to form a flow pattern more conducive to mixing, promote the overall circulation of the slurry in the tank, and improve the quality of the pulp.

[0033] As Figure 1 and Figure 2 shown, the tank body 1 is provided with an inspection port 10 at the top, and a sealing cover 11 is arranged at the inspection port 10. The provision of the inspection port 10 provides an access for the operator to observe the internal condition of the pulping tank. By opening the sealing cover 11 on the inspection port 10, the worker can check the working condition of the stirring assembly 5 (such as the rotating shaft 51, the scraper 52, the turbine 53 and the stirring rod 7), such as whether there is loose, damage or abnormal wear of the parts, etc. During the pulping process, the liquid level, color, flowability and other characteristics of the slurry can also be observed through the inspection port 10, so that possible problems can be found in time, such as whether the slurry has precipitate, whether too much foam is generated, etc.

[0034] As Figure 2 and Figure 3 shown, the connecting portion between the rotating shaft 51 and the tank body 1 is provided with a bearing 12. The bearing 12 provides stable support for the rotating shaft 51, so that the rotating shaft 51 can rotate smoothly in the tank body 1. The bearing 12 can convert the sliding friction between the rotating shaft 51 and the tank body 1 into rolling friction, greatly reducing the friction and thus reducing the wear at the connecting portion between the rotating shaft 51 and the tank body 1.

[0035] The above is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A pulping tank for a wet flue gas desulfurization system, characterized by: The invention comprises a tank body, wherein a feed port and a water inlet are provided on the top of the tank body, a slurry discharge port is provided on one side of the tank body, a stirring assembly is provided in the tank body, a driving motor for driving the stirring assembly to rotate is provided on the top of the tank body, and the stirring assembly comprises a rotating shaft, a scraper and a turbine, the rotating shaft is rotatably arranged in the tank body, the upper end of the rotating shaft extends outside the tank body and is connected to the output shaft of the driving motor, the scraper is fixed to the bottom of the rotating shaft, the lower end of the scraper abuts against the inner bottom of the tank body, the two ends of the scraper abut against the inner wall of the tank body, and the turbine is fixed on the rotating shaft and is located above the scraper.

2. The pulping tank for a wet flue gas desulfurization system according to claim 1, characterized in that: A plurality of stirring rods are provided on the rotating shaft at equal intervals above the turbine.

3. The pulping tank for a wet flue gas desulfurization system according to claim 2, characterized in that: The scraper is arranged obliquely.

4. The pulping tank for a wet flue gas desulfurization system according to claim 3, characterized in that: The included angle between the scraper and the inner bottom of the tank body is 30° to 60°.

5. The pulping tank for a wet flue gas desulfurization system according to claim 1, characterized in that: A connecting rod is fixed between two adjacent stirring rods. A roller is movably sleeved on the connecting rod. The outer surface of the roller is rollingly connected to the inner wall of the tank body.

6. The pulping tank for a wet flue gas desulfurization system according to claim 1, characterized in that: An inspection port is provided on the top of the tank body, and an adapted sealing cover is provided at the inspection port.

7. The pulping tank for a wet flue gas desulfurization system according to claim 1, characterized in that: A bearing is provided at the connection between the rotating shaft and the tank body.

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