Desulfurized limestone slurry tank

Abstract

The utility model relates to the technical field of flue gas desulfurization, and particularly provides a desulfurized limestone slurry tank, which comprises a tank body, a stirrer arranged in the tank body, a feed port arranged at the top of the tank body, water pipes respectively used for water inlet and water outlet, and a water seal mechanism comprising dust collection cloth, a bracket, a driving wheel, at least two third wheels and a motor, wherein one third wheel is arranged in the box body, the dust collection cloth is arranged on the driving wheel and the third wheel in a sleeving mode, and the motor drives the driving wheel so that the dust collection cloth can be driven and pass through the opening end of the feeding opening. According to the utility model, the water seal mechanism is used for absorbing the limestone powder flying at the charging hole by using the wet dust collection cloth, and then the dust collection cloth is fed into the box body to be in contact with the slurry in the box body and dissolved into the slurry, so that the waste of the limestone powder is reduced, and the safety of operators for charging and equipment near the slurry box is protected; the practicability of the limestone slurry box is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of flue gas desulfurization technology, in particular to a desulfurization limestone slurry tank. BACKGROUND

[0002] Flue gas desulfurization is a common process in existing chemical waste gas treatment, and its main process is to pass the flue gas from the bottom of the absorption tower into the tower, and the flue gas diffuses upward along the tower body. In the process, the slurry containing sulfur components in the flue gas is sprayed through the spraying mechanism, and the sprayed slurry reacts with the sulfur components in the flue gas to achieve the purpose of flue gas desulfurization. Common slurry is alkaline, such as limestone slurry, which is generally placed in the slurry tank outside the absorption tower, and the slurry is pumped out of the slurry tank by the pump set and delivered to the spraying mechanism in the absorption tower.

[0003] Generally, the slurry tank is provided with a stirrer, a liquid level meter for detecting the liquid level of the slurry in the tank body is arranged at the top of the tank body, and a water inlet pipe, a limestone powder feeding port, and a drain pipe arranged at the bottom of the tank are also included. During feeding, the powdery limestone may generate dust during the feeding moment and the stirring process, which not only easily causes some structures in the tank to be blocked, but also is harmful to the health of the feeding workers. Therefore, there is an urgent need for a limestone slurry tank that can prevent feeding overflow or dust to solve the drawbacks of the prior art. CONTENT OF THE UTILITY MODEL

[0004] The embodiment of the present application provides a desulfurization limestone slurry tank to solve the problem of excessive dust during feeding in the prior art, which causes limestone powder to overflow and affects the health of workers.

[0005] The present application provides a desulfurization limestone slurry tank, comprising: a tank body, a stirrer arranged in the tank body, a feeding port arranged at the top of the tank body, water pipes for water inlet and outlet, and a water seal mechanism, wherein the water seal mechanism comprises a dust collection cloth, a bracket, a driving wheel, at least two overwheels, and a motor, one of the overwheels is arranged inside the tank body, and the motor is drivingly connected with the driving wheel; the dust collection cloth is sleeved on the driving wheel and the overwheels, and the dust collection cloth passes through the opening end of the feeding port in transmission, and the top surface of the tank body is provided with a narrow gap for the dust collection cloth to pass through.

[0006] Optionally, the feeding port is provided with a conical hopper, the opening end of the hopper comprises an inwardly buckled baffle, and the baffle is provided with a through hole for the dust collection cloth to pass through.

[0007] Optionally, the narrow gap comprises a pair of clamping plates arranged opposite to each other, the clamping plates are connected with the narrow gap through a connecting shaft, a spring is sleeved on the connecting shaft, and the two ends of the spring are connected with the two clamping plates opposite to each other.

[0008] Optionally, the stirrer comprises a first drive, a first rotating shaft connected with the first drive, a second drive, a second rotating shaft connected with the second drive, and blades arranged on the first rotating shaft and the second rotating shaft, wherein the first rotating shaft and the second rotating shaft are independent of each other and are connected with the top and the bottom of the box body respectively.

[0009] Optionally, the top side of the box body further comprises an overflow pipe extending outwards from the box body, and a height of a pipe opening of the overflow pipe is lower than that of the dust absorption cloth.

[0010] Optionally, a detachable mesh bag is arranged on the pipe opening of the overflow pipe.

[0011] Optionally, a radius of rotation of the blades on the first rotating shaft is greater than that of the blades on the second rotating shaft, and an included angle between adjacent blades on the second rotating shaft is less than or equal to half of an included angle between adjacent blades on the first rotating shaft.

[0012] Optionally, the box body further comprises a defoamer, the defoamer comprises an operating rod extending out of the top surface of the box body and two stirring rods arranged in the box body, the two stirring rods are arranged at an included angle in the same horizontal plane in the box body, one end of each of the two stirring rods is slidably connected with an inner surface of the box body, and the operating rod is arranged close to the overflow pipe at an end of a stroke.

[0013] Optionally, the operating rod is hingedly connected with the stirring rods, a rubber strip is arranged on each of the stirring rods, and the operating rod controls the increase and decrease of the included angle between the two stirring rods.

[0014] The working logic and beneficial effects of the present application are as follows:

[0015] The desulfurization limestone slurry tank provided by the present application utilizes the water sealing mechanism to absorb the limestone powder flying up at the feeding opening by the dust absorption cloth with wet water, then the dust absorption cloth is sent into the box body to contact the slurry in the box body, so that the limestone powder on the dust absorption cloth is dissolved into the slurry, and through the cycle of dust absorption, release, re-dust absorption and re-release, the flying limestone powder during feeding is finally recycled, which not only reduces the waste of limestone powder, but also protects the safety of the operator and the equipment near the slurry tank, and improves the practicability of the limestone slurry tank. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Fig. 1 shows a front view of a desulfurization limestone slurry tank and a structure inside the box body according to an embodiment of the present application;

[0017] Figure 2 Fig. 4 shows a forward structure of a water sealing mechanism according to an embodiment of the present application;

[0018] Figure 3Figure 1 shows a schematic diagram of the top view of the box body in the embodiment of the present application;

[0019] Figure 4 Figure 2 shows a schematic diagram of the top view of the defoamer in the embodiment of the present application.

[0020] Figure 1 shows a schematic diagram of the top view of the box body in the embodiment of the present application;

[0021] 1: box body; 2: stirrer; 21: first rotating shaft; 22: second rotating shaft; 3: feeding port; 31: hopper; 32: baffle; 4: water seal mechanism; 41: dust absorption cloth; 43: driving wheel; 44: driven wheel; 5: narrow gap; 51: clamping plate; 6: overflow pipe; 7: defoamer; 71: operating rod; 72: shifting rod. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. In addition, "in an embodiment" or "in an embodiment" appearing throughout the specification does not necessarily refer to the same embodiment. Furthermore, these specific features, structures or characteristics can be combined in any suitable manner in one or more embodiments.

[0023] It should also be noted that, in this document, the terms such as first and second are merely used to distinguish one entity from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such article or terminal device. Without more limitations, the element defined by the phrase "including a" does not exclude the presence of another identical element in the article or terminal device including the element.

[0024] Flue gas desulfurization is a process in which flue gas is introduced from the bottom of the absorption tower, and the flue gas is absorbed by the sprayed slurry containing sulfur substances during the upward diffusion along the tower body. The common slurry is alkaline, such as limestone slurry, which is generally arranged in the slurry tank outside the absorption tower. Generally, the slurry tank is provided with a stirrer, a liquid level meter for detecting the liquid level of the slurry in the tank is arranged at the top of the tank, and a water inlet pipe and a feeding port for adding lime powder are also provided, as well as a liquid discharge pipe arranged at the bottom of the tank. During feeding, the powdery limestone will generate dust during the feeding moment and the stirring process, which not only easily causes the blockage of some structures in the tank, but also is harmful to the health of the feeding workers. Therefore, there is an urgent need for a limestone slurry tank that can prevent feeding overflow or dust, to solve the drawbacks of the prior art.

[0025] The present invention will now be described in detail with reference to the accompanying drawings.

[0026] This utility model provides a desulfurization limestone slurry tank, comprising: a tank body 1, a stirrer 2 disposed inside the tank body 1, a feeding port 3 disposed on the top of the tank body 1, water pipes for water inlet and outlet respectively, and a water seal mechanism 4. The water seal mechanism 4 includes a dust-collecting cloth 41, a bracket, a drive wheel 43, at least two guide wheels 44, and a motor. The dust-collecting cloth 41 is sleeved on the drive wheel 43 and the guide wheels 44, and the dust-collecting cloth 41 passes through the open end of the feeding port 3 during transmission. One of the guide wheels 44 is disposed inside the tank body 1. The motor is driven and connected to the drive wheel 43. The top surface of the tank body 1 includes a narrow slit 5 for the dust-collecting cloth 41 to pass through.

[0027] As described above, the desulfurization limestone slurry tank provided by this utility model utilizes a water seal mechanism 4 to absorb the limestone powder flying up at the feeding port 3 using a wet dust-absorbing cloth 41. The dust-absorbing cloth 41 is then sent into the tank body 1 to contact the slurry inside the tank body 1, so that the limestone powder on the dust-absorbing cloth 41 dissolves into the slurry. In this way, by using the dust-absorbing cloth 41 to absorb dust, release, absorb dust again, and release again, the limestone powder flying up during feeding is finally recovered. This not only reduces the waste of limestone powder, but also protects the safety of the feeding operators and the equipment near the slurry tank, thus improving the practicality of the limestone slurry tank.

[0028] Specifically, such as Figure 1 The water seal mechanism 4 shown has a drive wheel 43 and a guide wheel 44 connected to a bracket on the outer side of the top of the housing 1. The feeding port 3 is located between the drive wheel 43 and the guide wheel 44. A bracket is installed on the inner wall of the housing 1 to fix the guide wheel 44, allowing the guide wheel 44 to rotate relative to the bracket. A dust-collecting cloth 41 is wound around the drive wheel 43 and the two guide wheels 44, forming a triangular dust-collecting cloth 41 control mechanism. A motor is connected to the drive wheel 43 for driving. When the motor rotates, the dust-collecting cloth 41 begins to move, causing it to alternate between the outside and inside of the housing 1. Limestone dust from the feeding port 3 is directly adsorbed onto the dust-collecting cloth 41, and then carried into the housing 1 to contact the slurry inside, causing the limestone powder to dissolve in the slurry. Of course, two or more guide wheels 44 can also be installed inside the housing 1; this design is also within the scope of protection of this application. In this embodiment, the water inlet and outlet pipes on the tank are not specifically limited and can be adjusted according to the convenience of actual use.

[0029] The aforementioned feeding port 3 is equipped with a conical hopper 31. The opening end of the hopper 31 includes an inwardly folding baffle 32, and the baffle 32 has a through hole for the dust-collecting cloth 41 to pass through. Figure 2As shown, the baffle 32 of the edge of the conical hopper 31 can be buckled inward to block a part of the raised limestone dust. In addition, when the dust cloth 41 passes through the baffle 32, the friction between the dust cloth 41 and the through hole of the baffle 32 can make a part of the dust fall into the charging port 3 again, that is, the dust absorbed in the dust cloth 41 is scraped off, thereby reducing the dust directly adsorbed on the dust cloth 41.

[0030] In addition, as shown in the drawings, Figure 3 As shown, the narrow gap 5 provided on the top surface of the box body 1 for the dust cloth 41 to pass through includes a pair of clamping plates 51 connected to the narrow gap 5 through a connecting shaft, and a spring is sleeved on the connecting shaft. The two metal wires extending from the body of the spring are respectively connected to the two opposite clamping plates 51 to fix the installation angle of the clamping plates 51. The two opposite clamping plates 51 can block the excess slurry adsorbed on the dust cloth 41 and fall back into the box body 1, thereby reducing the outflow of the slurry.

[0031] In some embodiments, the stirrer 2 includes a first drive, a first rotating shaft 21 connected to the first drive, a second drive, a second rotating shaft 22 connected to the second drive, and blades provided on the first rotating shaft 21 and the second rotating shaft 22. The first rotating shaft 21 and the second rotating shaft 22 are independent of each other and are respectively connected to the top and bottom of the box body 1. Specifically, the rotating radius of the blades on the first rotating shaft 21 is greater than the rotating radius of the blades on the second rotating shaft 22, and the included angle between adjacent blades on the second rotating shaft 22 is less than or equal to half of the included angle between adjacent blades on the first rotating shaft 21.

[0032] As shown in the drawings, Figure 1 In this embodiment, two independent drives, i.e., a first drive and a second drive, are provided to control the rotation of the first rotating shaft 21 and the second rotating shaft 22 inside the box body 1 from the top and bottom of the box body 1 respectively, thereby driving the blades to stir the slurry. The purpose of providing two independent drives is mainly to improve the stirring quality. When there is a little limestone deposition on the bottom surface of the box body 1, the single rotation of the first rotating shaft 21 cannot fully stir the deposited limestone powder to dissolve in the slurry. The second rotating shaft 22 with a larger blade density and smaller blade size can quickly disperse the deposition, and cooperate with the first rotating shaft 21 to make the limestone powder fully dissolved in the slurry, thereby improving the stirring quality of the stirrer 2. In addition, this setting can also reduce the pressure of single rotating shaft stirring. The size, length and distribution position of the blades on the first rotating shaft 21 and the second rotating shaft 22 are not limited in this embodiment.

[0033] In some embodiments, the top side of the housing 1 further includes an overflow pipe 6 extending from inside the housing 1 to the outside, the opening of the overflow pipe 6 being lower than the dust collection cloth 41. Additionally, a mesh bag can be fitted over the opening of the overflow pipe 6, and the mesh bag is detachably connected to the opening of the overflow pipe 6.

[0034] like Figure 1 As shown, the overflow pipe 6 not only allows the tank 1 to communicate with the outside, but also prevents excessive slurry from exceeding the maximum water level and affecting the safety of the tank 1. It reduces the pressure of the slurry on the tank 1 by discharging excess slurry. The mesh bag at the external port of the overflow pipe 6 prevents limestone powder from flying out of the overflow pipe 6 and affecting the environment when the limestone powder is being stirred inside the tank 1. The mesh bag absorbs and treats any flying limestone powder. Furthermore, to increase the absorption capacity of the mesh bag, it can be wetted with slurry. This embodiment does not specifically limit the structure of the mesh bag.

[0035] In some embodiments, the housing 1 further includes a demister 7, such as... Figure 4 As shown, the demister 7 includes an operating rod 71 extending from the top surface of the housing 1 and two levers 72 disposed inside the housing 1. The two levers 72 are arranged at an angle to each other in the same horizontal plane inside the housing 1. One end of the two levers 72 is slidably connected to the inner surface of the housing 1. The end of the stroke of the operating rod 71 is disposed near the overflow pipe 6. The operating rod 71 controls the increase and decrease of the angle between the two levers 72.

[0036] During the feeding or mixing process, foaming may occur in the slurry, meaning foam forms on the surface of the slurry. This foam not only affects the accuracy of liquid level detection but also hinders the normal slurry extraction by the pump unit. Therefore, it is necessary to remove the foam from the surface of the foamed slurry. Figure 4 As shown, the demister 7 in this invention moves by controlling the operation lever 71, and uses a lever 72 at a certain height on the slurry surface to gather the foam on the slurry surface near the overflow pipe 6, allowing the foam to flow out from the overflow pipe 6, or gather the foam at the outlet at other heights so that the foam can be scraped off. The gathering effect is achieved by changing the included angle between the two levers 72, that is, from a maximum included angle to an acute angle. In this embodiment, the starting and ending positions of the lever 72 during defoaming are not specifically limited, and can be adjusted adaptively according to the actual size of the tank 1.

[0037] In other embodiments, the operating lever 71 is hinged to the lever 72, and the lever 72 is provided with a rubber strip. In this embodiment, the rubber strip can reduce the amount of foam adhering to the surface of the lever 72. Because the surface of the rubber strip is smooth and its hydrophobicity is strong, it can reduce the absorption of water in the slurry by the lever 72, thereby affecting the concentration of the slurry.

[0038] Finally, it needs to be explained that the slurry tank provided by the utility model can not only be applied in the limestone slurry desulfurization system, but also can be applied in other component slurry desulfurization technical systems, and the use environment of similar principles is in the protection range of the utility model.

[0039] It needs to be explained that the above embodiments all belong to the same utility model concept, the description of each embodiment has its own emphasis, and the description not described in detail in individual embodiments can be referred to the description in other embodiments. Each embodiment in the description is described in a progressive manner, and each embodiment mainly describes the difference from other embodiments, and the same and similar parts between each embodiment can be referred to each other.

[0040] The above embodiments only express the implementation of the utility model, and the description is more specific and detailed, but it cannot be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled persons in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which all belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A desulfurizing limestone slurry tank comprising: The box (1), the stirrer (2) arranged in the box (1), the feeding opening (3) arranged on the top of the box (1), and the water pipes for water inlet and outlet, characterized in that further comprising a water seal mechanism (4), the water seal mechanism (4) comprising a dust absorption cloth (41), a bracket, a driving wheel (43), at least two overwheels (44) and a motor, one of the overwheels (44) is arranged inside the box (1), the motor is drivingly connected with the driving wheel (43); the dust absorption cloth (41) is sleeved on the driving wheel (43) and the overwheels (44), and the dust absorption cloth (41) passes through the opening end of the feeding opening (3) in transmission, the top surface of the box (1) is provided with a narrow gap (5) for the dust absorption cloth (41) to pass through.

2. The desulfurizing limestone slurry tank according to claim 1, characterized by, The feeding opening (3) is provided with a conical hopper (31), the opening end of the hopper (31) comprises an inwardly buckled baffle (32), and the baffle (32) is provided with a through hole for the dust absorption cloth (41) to pass through.

3. The desulfurizing limestone slurry tank according to claim 2, characterized by, The narrow gap (5) comprises a pair of clamping plates (51) arranged in pairs, the clamping plates (51) are connected with the narrow gap (5) through a connecting shaft, a spring is sleeved on the connecting shaft, and two ends of the spring are respectively connected with the two clamping plates (51) opposite to each other.

4. The desulfurizing limestone slurry tank according to claim 1, characterized by, The stirrer (2) comprises a first drive, a first rotating shaft (21) connected with the first drive, a second drive, a second rotating shaft (22) connected with the second drive, and blades arranged on the first rotating shaft (21) and the second rotating shaft (22), the first rotating shaft (21) and the second rotating shaft (22) are independent of each other and are respectively connected with the top and the bottom of the box (1).

5. The desulfurizing limestone slurry tank according to claim 1, characterized by, The top side of the box (1) further comprises an overflow pipe (6) extending outwards from the box (1), and the height of the pipe opening of the overflow pipe (6) is lower than that of the dust absorption cloth (41).

6. The desulfurizing limestone slurry tank according to claim 5, characterized by The pipe opening of the overflow pipe (6) is sleeved with a detachable mesh bag.

7. The desulfurizing limestone slurry tank according to claim 4, characterized by The radius of rotation of the blades on the first rotating shaft (21) is greater than that of the blades on the second rotating shaft (22); and the included angle between adjacent blades on the second rotating shaft (22) is less than or equal to half of the included angle between adjacent blades on the first rotating shaft (21).

8. The desulfurizing limestone slurry tank according to claim 5, characterized by, The box (1) further comprises a defoamer (7), the defoamer (7) comprises an operating rod (71) extending out of the top surface of the box (1) and two stirring rods (72) arranged in the box (1), the two stirring rods (72) are arranged at an included angle in the same horizontal plane in the box (1), one end of the two stirring rods (72) is slidingly connected with the inner surface of the box (1), and the end of the stroke of the operating rod (71) is arranged close to the overflow pipe (6).

9. The desulfurizing limestone slurry tank according to claim 8, characterized in that, The operating rod and the stirring rod (72) are hinged, and the stirring rod (72) is provided with a rubber strip.

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