Desulfurizing tower based on SDA desulfurization process

Abstract

The utility model discloses a desulfurization tower based on an SDA desulfurization process. The desulfurization tower comprises a desulfurization tower, a circulating pump and a slurry pipe for conveying slurry into the desulfurization tower, a plurality of spherical cavities are formed in the slurry pipe, and upper nozzles and lower nozzles which are used for spraying slurry are symmetrically arranged on the spherical cavities respectively; a rotating cavity is rotationally arranged in the spherical cavity, a water outlet is formed in the rotating cavity, and the rotating cavity rotates under the impact of water flow so as to switch the water outlet nozzles. According to the desulfurization tower based on the SDA desulfurization process, due to the design of the waved plates, flue gas is uniformly separated by the waved plates after entering the desulfurization tower, sufficient reaction is more facilitated, meanwhile, the rotating cavity is driven to rotate by the impact of water pressure, slurry is intermittently sprayed up and down, the dosage of sprayed liquid is consistent each time, the liquid-gas mixing efficiency is guaranteed, and the desulfurization efficiency is improved. And meanwhile, as the position of the slurry injection outlet is changed, the flow rate of gas in the desulfurization tower is changed, so that turbulent flow is formed, and the liquid-gas mixing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization towers, in particular to a desulfurization tower based on an SDA desulfurization process. Background Art

[0002] The SDA desulfurization process is a technology used for flue gas desulfurization, mainly used in industrial fields such as coal-fired power plants and cement plants. It usually includes multiple processes such as flue gas treatment, absorbent injection, reaction precipitation, etc., and desulfurization is achieved by spraying absorbent into the desulfurization tower.

[0003] In conjunction with announcement number CN211864519U, publication date 2020-11-06, a desulfurization tower is disclosed.

[0004] In the prior art including the above patents, a drainage pipe is fixed on the upper part of the tower body, and the top of the tower body is connected to an exhaust pipe, a plurality of nozzles are installed at the bottom of the drainage pipe, and one end of the drainage pipe is connected to the water outlet of the circulating pump through the drainage pipe, and the heat of the flue gas to be desulfurized can be transferred to the drainage pipe through the casing, and then the desulfurization solution inside the drainage pipe is heated to increase the activity of the solution. However, in the process of spraying the absorbent, since the nozzle points downward, part of the flue gas that has not fully reacted moves upward. When the height of the flue gas is higher than the drainage pipe, the sprayed absorbent cannot reach the height of the flue gas, which will cause the sulfur-containing gas to directly contact the demister plate, and the gas containing water is intercepted by the demister plate and retained on the surface of the demister plate, and needs to wait for the water vapor to gather into large droplets before falling, while the sulfur-containing gas with less water content may escape. Utility Model Content

[0005] The utility model aims to provide a desulfurization tower based on the SDA desulfurization process, so as to solve the above problems.

[0006] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a desulfurization tower based on the SDA desulfurization process, comprising: a desulfurization tower, a circulation pump and a slurry pipe for conveying slurry into the desulfurization tower;

[0007] The slurry pipe is provided with a plurality of spherical cavities, and the spherical cavities are symmetrically provided with upper nozzles and lower nozzles for spraying slurry;

[0008] A rotating chamber is rotatably arranged in the spherical chamber, and a water outlet is opened on the rotating chamber. The rotating chamber is rotated by the impact of the water flow to switch the water outlet nozzle.

[0009] Preferably, an impeller for driving the rotating chamber is fixedly disposed in the rotating chamber.

[0010] Preferably, there is a retention station for retaining the impeller on the rotation stroke of the impeller.

[0011] Preferably, a clamp is provided on the spherical cavity, and the clamp is located on the retention station.

[0012] Preferably, a limiting member that is snap-fitted with the clamping member is fixedly provided at the first end of the impeller, and the limiting member includes a guide sliding surface and a retention groove for retaining the clamping member.

[0013] Preferably, the first end of the impeller is rotatably provided with a rotating member which forms a retaining fit with the locking member.

[0014] Preferably, arc-shaped blades are rotatably arranged in the upper nozzle.

[0015] Preferably, a gas outlet is provided at the top of the desulfurization tower, and a demister is provided in the gas outlet.

[0016] Preferably, a plurality of corrugated plates for uniformly distributing the flue gas are provided inside the desulfurization tower.

[0017] In the above technical scheme, a desulfurization tower based on the SDA desulfurization process provided by the utility model has the following beneficial effects: due to the design of the wave plate, the flue gas is evenly separated by the wave plate after entering the desulfurization tower, which is more conducive to sufficient reaction. At the same time, the impact of water pressure drives the rotating chamber to rotate, so that the slurry is intermittently sprayed up and down and the dosage of each spray is consistent, ensuring the liquid-gas mixing efficiency. At the same time, due to the change in the injection outlet position of the slurry, the gas flow rate in the desulfurization tower changes, thereby forming turbulence and improving the liquid-gas mixing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 An overall three-dimensional schematic diagram provided for an embodiment of the utility model;

[0020] Figure 2 A schematic diagram of a cutaway structure provided for an embodiment of the utility model;

[0021] Figure 3 A schematic diagram of a slurry pipe provided in an embodiment of the utility model;

[0022] Figure 4 A schematic diagram of a spherical cavity and an upper nozzle and a lower nozzle provided in an embodiment of the utility model;

[0023] Figure 5 A schematic cross-sectional view of a spherical cavity provided in an embodiment of the utility model;

[0024] Figure 6 A schematic diagram of a rotating chamber and an impeller provided in an embodiment of the utility model;

[0025] Figure 7 The embodiment of the utility model provides Figure 6 A is an enlarged schematic diagram.

[0026] Description of reference numerals:

[0027] 1. Desulfurization tower; 2. Air outlet; 3. Slurry pipe; 4. Circulation pump; 5. Corrugated plate; 6. Spherical cavity; 7. Upper nozzle; 71. Curved blade; 8. Lower nozzle; 9. Rotating cavity; 10. Impeller; 101. Limiting part; 102. Rotating part; 103. Retention tank; 11. Clamp. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0029] like Figure 1-7 As shown, a desulfurization tower based on the SDA desulfurization process includes: a desulfurization tower 1, a circulation pump 4 and a slurry pipe 3 for conveying slurry into the desulfurization tower 1;

[0030] The slurry pipe 3 is provided with a plurality of spherical cavities 6, and the spherical cavities 6 are symmetrically provided with upper nozzles 7 and lower nozzles 8 for spraying slurry;

[0031] A rotating chamber 9 is rotatably disposed in the spherical chamber 6, and a water outlet is opened on the rotating chamber 9. The rotating chamber 9 is rotated by the impact of the water flow to switch the water outlet nozzle.

[0032] Specifically, the desulfurization tower 1 is connected to the smoke inlet channel, the slurry pipe 3 and the spherical cavity 6 are located above the smoke inlet, and the corrugated plate 5 is located between the smoke inlet and the slurry pipe 3. After the flue gas in the smoke inlet enters the desulfurization tower 1, it is evenly separated by the corrugated plate 5, which is more conducive to a full reaction. After the slurry in the slurry pipe 3 is transported into the spherical cavity 6, the rotating cavity 9 is driven to rotate by the impact of water pressure. Due to the large friction resistance between the rotating cavity 9 and the spherical cavity 6, the rotation speed of the rotating cavity 9 is slow, and the water outlet rotates synchronously during the rotation process. When the water outlet rotates to the upper nozzle 7, the slurry is sprayed upward from the upper nozzle 7. The sprayed droplets increase the concentration of fog particles in the upper space and accelerate the speed of droplet convergence. When the water outlet rotates to the lower nozzle 8, the slurry is sprayed downward. The slurry is sprayed up and down intermittently and the dosage of each spray is consistent.

[0033] In the above technology, due to the design of the wave plate 5, the flue gas is evenly separated by the wave plate 5 after entering the desulfurization tower 1, which is more conducive to sufficient reaction. At the same time, the impact of water pressure drives the rotating chamber 9 to rotate, so that the slurry is sprayed up and down intermittently and the dosage of each spray is consistent, ensuring the liquid-gas mixing efficiency. At the same time, due to the change in the injection outlet position of the slurry, the gas flow rate in the desulfurization tower 1 changes, thereby forming turbulence and improving the liquid-gas mixing efficiency.

[0034] As an embodiment further provided by the present invention, there is a retention station for retaining the impeller 10 on the rotation stroke of the impeller 10 .

[0035] Specifically, a counterweight is installed on the rotating chamber 9. After the slurry is transmitted to the spherical chamber 6 through the slurry pipe 3, the water pressure drives the impeller 10 to rotate, and the impeller 10 drives the fixed rotating chamber 9 to rotate synchronously. When the rotating chamber 9 rotates to the retention position, the impeller 10 is retained. At this time, the counterweight is not in the initial position, so that the position of the rotating chamber 9 is stagnant for a period of time, and the slurry is ejected outward from the nozzle currently corresponding to the water outlet. Then the water pressure is reduced, and the rotational force of the impeller 10 is reduced accordingly. Under the action of the deadweight of the rotating chamber 9 and the gravity of the counterweight, the impeller 10 is driven to reset.

[0036] As another embodiment further provided by the present invention, a limiting member 101 is fixedly provided at the first end of the impeller 10 to form a snap fit with the clamping member 11 . The limiting member 101 includes a guide sliding surface and a retention groove 103 for retaining the clamping member 11 .

[0037] Specifically, Figure 5 The position shown is used as a reference. When the impeller 10 rotates to the retention position, the limit member 101 slides into the retention groove 103 along the guide surface and engages with the clamping member 11. At this time, the clamping member 11 is located in the retention groove 103. When the impeller 10 tends to rotate counterclockwise, the retention groove 103 and the clamping member 11 are against each other. When the impeller 10 tends to rotate clockwise, the retention groove 103 and the clamping member 11 are disengaged.

[0038] As another embodiment further provided by the present invention, a rotating member 102 is rotatably provided at the first end of the impeller 10 to form a blocking fit with the clamping member 11 .

[0039] Specifically, spiral blades are provided in the rotating member 102, which rotate under the action of water pressure, and the rotating member 102 is located on the central axis of the impeller 10. The rotation speed of the rotating member 102 is higher than that of the impeller 10 and increases with the increase of water pressure. It collides with the clamping member 11 many times during the rotation process. When the rotation speed is low, after the rotating member 102 collides with the clamping member 11, the clamping member 11 resets under the action of its own weight and continues to clamp the rotating chamber 9. When the rotation speed is high, the resetting speed of the clamping member 11 is slower than the speed of the rotating member 102 when it collides, so that the clamping member 11 is continuously subjected to the tangential direction force generated by the collision of the rotating member 102. At this time, the clamping member 11 cannot be reset in time and disengage from the retention groove 103. At this time, the rotating chamber 9 loses the obstruction of the clamping member 11 and continues to rotate.

[0040] As another embodiment further provided by the present invention, an arc-shaped blade 71 is rotatably provided in the upper nozzle 7 .

[0041] Specifically, after the slurry enters the upper nozzle 7, it impacts the arc-shaped blades 71. Since the arc-shaped blades 71 are made of metal, the slurry is dispersed into droplets during the impact process. At the same time, the slurry pushes the arc-shaped blades 71 to rotate, thereby expanding the spraying range.

[0042] Working principle: the desulfurization tower 1 is connected with the smoke inlet channel, the slurry pipe 3 and the spherical cavity 6 are located above the smoke inlet, and the wave plate 5 is located between the smoke inlet and the slurry pipe 3. After the flue gas in the smoke inlet enters the desulfurization tower 1, it is evenly separated by the wave plate 5, which is more conducive to full reaction. After the slurry in the slurry pipe 3 is transported into the spherical cavity 6, the water pressure drives the impeller 10 to rotate, and the impeller 10 drives the fixed rotating cavity 9 to rotate synchronously. When the rotating cavity 9 rotates to the retention position, the limiter 101 slides into the retention groove 103 along the guide surface and engages with the clamp 11. At this time, the clamp 11 is located in the retention groove 103, and the rotating part After 102 collides with the clamping member 11, the clamping member 11 resets under the action of its own weight and continues to clamp the rotating chamber 9, so that the rotating chamber 9 is stagnant and the slurry is ejected from the nozzle corresponding to the water outlet; the water pressure is increased, the rotation speed of the rotating member 102 increases, and the speed of the clamping member 11 resetting is slower than the speed of the rotating member 102 when it collides, so that the clamping member 11 is continuously subjected to the tangential direction force generated by the rotating member 102 when it collides. At this time, the clamping member 11 cannot be reset in time and detaches from the retention groove 103. At this time, the rotating chamber 9 loses the obstruction of the clamping member 11 and continues to rotate, so that the nozzle corresponding to the water outlet changes and the injection direction is changed.

[0043] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A desulfurization tower based on SDA desulfurization process, characterized in that: include: A desulfurization tower (1), a circulation pump (4), and a slurry pipe (3) for conveying slurry into the desulfurization tower (1); The slurry pipe (3) is provided with a plurality of spherical cavities (6), and the spherical cavities (6) are symmetrically provided with upper nozzles (7) and lower nozzles (8) for spraying slurry; A rotating chamber (9) is rotatably arranged in the spherical chamber (6), a water outlet is provided on the rotating chamber (9), and the rotating chamber (9) rotates under the impact of the water flow to switch the water outlet nozzle.

2. A desulfurization tower based on the SDA desulfurization process according to claim 1, characterized in that: An impeller (10) for driving the rotating chamber (9) is fixedly arranged in the rotating chamber (9).

3. A desulfurization tower based on the SDA desulfurization process according to claim 2, characterized in that: A retention station for retaining the impeller (10) is provided on the rotation stroke of the impeller (10).

4. A desulfurization tower based on the SDA desulfurization process according to claim 3, characterized in that: The spherical cavity (6) is provided with a clamping piece (11), and the clamping piece (11) is located at a retention position.

5. A desulfurization tower based on the SDA desulfurization process according to claim 4, characterized in that: A limiting member (101) is fixedly provided at the first end of the impeller (10) and is engaged with the clamping member (11). The limiting member (101) comprises a guide sliding surface and a retention groove (103) for retaining the clamping member (11).

6. A desulfurization tower based on the SDA desulfurization process according to claim 4, characterized in that: The first end of the impeller (10) is rotatably provided with a rotating member (102) which forms a blocking fit with the clamping member (11).

7. A desulfurization tower based on the SDA desulfurization process according to claim 1, characterized in that: An arc-shaped blade (71) is rotatably arranged inside the upper nozzle (7).

8. The desulfurization tower based on the SDA desulfurization process according to claim 1 is characterized in that: The desulfurization tower (1) is provided with a gas outlet (2) at the top, and a demister is provided inside the gas outlet (2).

9. A desulfurization tower based on the SDA desulfurization process according to claim 1, characterized in that: A plurality of corrugated plates (5) for uniformly distributing flue gas are arranged inside the desulfurization tower (1).

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