Synergistic device of desulfurizing absorption tower

Abstract

The utility model discloses a desulfurizing absorption tower synergistic device which comprises a multiphase flow reinforced rotary-cut turbulent flow unit arranged at the upper part in a tower body of a first-stage absorption tower, and the multiphase flow reinforced rotary-cut turbulent flow unit is arranged between a spraying layer and a flue gas inlet in the absorption tower; the multiphase flow reinforced rotary-cut turbulent flow unit comprises a horizontal mounting plate and a turbulent flow module arranged on the mounting plate; the turbulent flow module comprises an inner cylinder, a middle cylinder and an outer cylinder, the inner cylinder is sequentially sleeved with the middle cylinder and the outer cylinder, first blades are evenly distributed between the middle cylinder and the outer cylinder in the circumferential direction, and second blades are evenly distributed between the inner cylinder and the middle cylinder in the circumferential direction. Slurry sprayed by the spraying layer and rising flue gas are fully mixed under the action of the multiphase flow reinforced rotary-cut turbulent flow unit and then fall to the bottom of the absorption tower. The spirally rising flue gas can increase the gas-liquid contact area and improve the gas-liquid mass transfer rate, so that the desulfurization and dust removal efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of desulfurization system equipment in thermal power plants, in particular to a desulfurization absorption tower efficiency enhancement device. Background Art

[0002] The output level of the desulfurization system directly affects the purchase and blending of coal, and has a certain impact on the economic benefits of coal-fired units. In addition, the environmental protection policies for coal-fired units are becoming increasingly stringent, and the requirements for pollution emission indicators are further reduced, which puts higher requirements on the environmental protection facilities of coal-fired units (especially the desulfurization system), posing a huge challenge to coal-fired units.

[0003] The desulfurization system of coal-fired units usually adopts the "limestone-gypsum" wet desulfurization process, setting up two absorption towers connected in series, the first-level absorption tower is equipped with four spray layers, and the second-level absorption tower is equipped with three spray layers.

[0004] The flue gas flows from bottom to top, and the slurry at the bottom of the absorption tower is pumped to the spray layer at the top through a circulation pump, and then sprayed downward, contacts the flue gas, and reacts with the SO2 in the flue gas to remove the SO2 in the flue gas.

[0005] After the slurry is sprayed downward from the spray layer, the slurry flows from top to bottom and the flue gas flows from bottom to top. Since the flue gas and slurry flow in a regular pattern and the contact time between the sprayed slurry and the flue gas is very short, the flue gas and slurry cannot fully contact each other, resulting in low desulfurization efficiency. In severe cases, the residual SO2 in the exhaust flue gas may exceed the standard. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a desulfurization absorption tower efficiency enhancement device, which is used to solve the problem that the desulfurization efficiency of the existing desulfurization tower is low and in serious cases, the residual SO2 in the discharged flue gas exceeds the standard.

[0007] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A desulfurization absorption tower efficiency enhancement device comprises a multiphase flow enhanced rotary shear spoiler unit arranged in the upper part of the tower body of the first-stage absorption tower, the multiphase flow enhanced rotary shear spoiler unit is arranged between the spray layer and the flue gas inlet in the absorption tower, the multiphase flow enhanced rotary shear spoiler unit comprises a horizontal mounting plate and a spoiler module arranged on the mounting plate; the spoiler module comprises an inner cylinder and an intermediate cylinder and an outer cylinder which are sequentially sleeved outside the inner cylinder, the outer cylinder is vertically penetrated and fixedly connected with the mounting plate, first blades are evenly distributed along the circumferential direction between the intermediate cylinder and the outer cylinder, second blades are evenly distributed along the circumferential direction between the inner cylinder and the intermediate cylinder, the first blades and the second blades are both inclined, and the outer cylinder, the first blades, the second blades of the intermediate cylinder and the inner cylinder are sequentially fixedly connected.

[0009] Furthermore, the first blade and the second blade are inclined in opposite directions. Under the action of the first blade and the second blade, the flue gas in the absorption tower rotates after passing through the first blade and the second blade, and the rotation directions are opposite.

[0010] Furthermore, the inclination angle of the first blade and the second blade is between 30 degrees and 60 degrees.

[0011] Furthermore, the outer cylinder, the middle cylinder and the inner cylinder are coaxial.

[0012] Furthermore, a conical cap is fixedly provided on the inner cylinder, and a large end of the conical cap is fixedly connected to the top end of the inner cylinder.

[0013] Furthermore, it is good to include a large flat liquid retention unit arranged on the upper part of the tower body of the second-stage absorption tower, the large flat liquid retention unit includes a horizontal bottom plate fixedly arranged in the tower body, the interior of the tower body is separated from top to bottom by the bottom plate, and the bottom plate is distributed with flow holes.

[0014] Furthermore, the diameter of the flow hole is greater than or equal to 35 mm.

[0015] The positive effects of the utility model are:

[0016] 1. The utility model is provided with a multiphase flow enhanced rotary shearing turbulent unit, which is provided with an inner cylinder, an intermediate cylinder and an outer cylinder, an inclined second blade is provided between the inner cylinder and the intermediate cylinder, and an inclined first blade is provided between the intermediate cylinder and the outer cylinder. The flue gas spirally rises under the action of the first blade and the second blade, and the slurry sprayed from the spray layer is fully mixed with the flue gas, and then falls to the bottom of the absorption tower through the first flow channel between the outer cylinder and the intermediate cylinder and the second flow channel between the intermediate cylinder and the inner cylinder. The spirally rising flue gas can increase the gas-liquid contact area and the gas-liquid mass transfer rate, thereby improving the desulfurization and dust removal efficiency.

[0017] 2. The inclination angles of the first blade and the second blade are opposite, so that the flue gas passing through the first flow channel and the second flow channel rotates in opposite directions, so that the flue gas and the sprayed slurry can enhance the gas-liquid turbulence when mixing, thereby increasing the gas-liquid collision frequency, increasing the gas-liquid contact area, and increasing the gas-liquid mass transfer rate, thereby further improving the desulfurization and dust removal efficiency.

[0018] 3. The utility model is also provided with a large flat liquid retention unit, which is provided with a bottom plate and a flow hole. The slurry sprayed from the spray layer forms a 30mm-40mm thick liquid retention layer on the bottom plate. When the smoke passes through the liquid retention layer, the reaction time of the smoke and the slurry can be prolonged.

[0019] 4. The utility model can be used to transform the existing desulfurization tower without taking up too much space, so that the structure is compact, the layout space is saved, the floor space is not increased, and the power consumption of the equipment is reduced. By using the utility model, not only the flue gas desulfurization efficiency and desulfurization effect can be improved, but also the optimal operation mode of the desulfurization slurry circulation pump and the oxidation fan can be achieved under the premise of ensuring the best quality parameters of the slurry and the desulfurization byproduct (i.e. gypsum), thereby achieving the optimal operation of the desulfurization system energy consumption and material consumption level, which can reduce the operation and maintenance cost of the desulfurization system and has a great reference significance for energy saving of the desulfurization system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model;

[0021] Figure 2 It is a schematic diagram of the structure of a multiphase flow enhanced rotary shearing spoiler unit;

[0022] Figure 3 is a schematic diagram of the arrangement of the spoiler module on the mounting plate;

[0023] Figure 4 It is a schematic diagram of the structure of the spoiler module;

[0024] Figure 5 yes Figure 4 Bottom view of

[0025] Figure 6 It is a stereoscopic image of the spoiler module;

[0026] In the figure:

[0027] 1. Tower body; 2. Circulation pump; 3. Circulation pipeline; 4. Spray pump; 5. Flue gas outlet pipe; 6. Large plane liquid retention unit; 7. Flue gas inlet pipe; 8. Multiphase flow enhancement rotary cutting spoiler unit; 9. Second flow channel; 10. Spoiler module; 11. Mounting plate; 12. Support frame B; 13. Outer cylinder; 14. First blade; 15. Intermediate cylinder; 16. Second blade; 17. Inner cylinder; 18. Conical cap; 19. First flow channel. DETAILED DESCRIPTION

[0028] Example 1

[0029] like Figures 1 to 6As shown, a desulfurization absorption tower efficiency enhancement device includes a multiphase flow enhancement rotary cutting spoiler unit 8 arranged at the upper part of the tower body 1 of the first-stage absorption tower, the multiphase flow enhancement rotary cutting spoiler unit 8 is arranged between the spray layer and the flue gas inlet in the absorption tower, and the multiphase flow enhancement rotary cutting spoiler unit 8 includes a horizontal mounting plate 11 and a spoiler module 10 arranged on the mounting plate 11. The bottom of the mounting plate 11 is provided with a support frame B 12 fixedly connected to the inner wall of the tower body, the Susou mounting plate 11 is fixedly connected to the support frame B 12, and the support frame B 12 adopts Q235B or Q355B rectangular square steel lined glass flakes for corrosion protection. The multiphase flow enhancement rotary cutting spoiler units 8 are arranged alternately and spread all over the mounting plate 11.

[0030] The spoiler module 10 includes an inner cylinder 17, an intermediate cylinder 15 and an outer cylinder 13 which are sequentially sleeved outside the inner cylinder 17, the inner cylinder 17, the intermediate cylinder 15 and the outer cylinder 13 are coaxial, the outer cylinder 13 is vertically penetrated and fixedly connected with the mounting plate 11, first blades 14 are evenly distributed between the intermediate cylinder 15 and the outer cylinder 13 along the circumferential direction, second blades 16 are evenly distributed between the inner cylinder 17 and the intermediate cylinder 15 along the circumferential direction, the first blades 14 and the second blades 16 are both inclined, and the outer cylinder 13, the first blades 14, the second blades 16 of the intermediate cylinder 15 and the inner cylinder 17 are sequentially fixedly connected.

[0031] The gap between the outer tube 13 and the middle tube 15 is the first flow channel 19, and the gap between the middle tube 15 and the inner tube 17 is the second flow channel 9. The first blade 14 is arranged in the first flow channel 19, and the second blade 16 is arranged in the second flow channel 9. A conical cap 18 is fixedly arranged on the top of the inner tube 17, and the large end of the conical cap 18 is downward and fixedly connected to the top end of the inner tube 17.

[0032] The multiphase flow enhanced rotary shearing and turbulence unit is based on the mass transfer mechanism of multiphase turbulent mixing. Through this component, swirl and turbulent space are generated to enable full contact between the gas, liquid and solid three phases, enhance mass transfer, and improve the removal efficiency of sulfur dioxide and dust.

[0033] Specifically, the slurry at the lower part of the tower body 1 is transported to the spray layer 4 through the circulation pipe 3 by the circulation pump 2, and then the spray layer sprays the slurry downward. The flue gas enters the first stage desulfurization tower ( Figure 1 The flue gas then flows upward from bottom to top through the first flow channel 19 and the second flow channel 9. Under the action of the first blade 14 and the second blade 2, the flue gas rises in a spiral. After the slurry sprayed from the spray layer 4 is fully mixed with the flue gas, it falls downward to the bottom of the tower body 1 through the first flow channel 19 and the second flow channel 9. The spirally rising flue gas can increase the gas-liquid contact area and the gas-liquid mass transfer rate, thereby improving the desulfurization and dust removal efficiency.

[0034] The material of each component of the multiphase flow enhancement rotary cutting spoiler unit 8 is made of 2205 stainless steel. A conical cap 18 is arranged on the inner cylinder 18 to reduce the resistance of the slurry and smoke when flowing.

[0035] Example 2

[0036] The difference between this embodiment and embodiment 1 is that:

[0037] The first blade 14 and the second blade 16 are inclined in opposite directions. Under the action of the first blade 14 and the second blade 16, the flue gas in the absorption tower rotates in opposite directions after passing through the first blade 14 and the second blade 16. The first blade 14 and the second blade 16 have an inclination angle of 40 degrees.

[0038] Since the inclination angles of the first blade 14 and the second blade 2 are opposite, the flue gas passing through the first flow channel 19 and the second flow channel 9 rotate in opposite directions, so that the flue gas and the sprayed slurry can enhance the gas-liquid turbulence when mixing, thereby increasing the gas-liquid collision frequency, increasing the gas-liquid contact area, and improving the gas-liquid mass transfer rate, thereby further improving the desulfurization and dust removal efficiency.

[0039] Example 3

[0040] like Figure 1 As shown, the difference between this embodiment and embodiment 1 is that:

[0041] The second-stage absorption tower (the absorption tower on the left) has a large-plane liquid retention unit 6 at the upper part of the tower body 1. The large-plane liquid retention unit 6 includes a horizontal bottom plate fixedly arranged in the tower body 1. The interior of the tower body 1 is divided into upper and lower parts by the bottom plate. The bottom plate is provided with flow holes, and the diameter of the flow holes is not less than 35 mm.

[0042] After the flue gas at the top of the first-stage absorption tower is discharged from its flue gas outlet pipe 5, it passes through the flue, and then enters the interior of the tower body 1 of the second-stage absorption tower through the flue gas inlet pipe 7 on the side of the second-stage absorption tower, and then passes through the flow hole from bottom to top. The circulation pump 2 transports the slurry at the bottom of the tower body 1 to the spray layer 4 through the circulation pipe 3, and then sprays it downward, and then falls back to the bottom of the tower body 1 through the flow hole.

[0043] The bottom plate is made of 2205 material with a thickness of 4 mm. A support beam A 9 fixedly connected to the inner wall of the tower body 1 is provided at the lower part of the bottom plate.

[0044] The supporting steel beam A9 is made of Q235B or Q355B rectangular steel lined with glass flakes for corrosion protection, and the bottom plate thickness is not less than 4.00mm. When the load is 30% to 100% BMCR, the large plane liquid retention unit 6 can work normally and form a 30mm-40mm thick liquid retention layer. The smoke passes through the liquid retention layer, which can prolong the reaction time of the smoke and slurry.

[0045] The above-mentioned embodiments are described in detail and specifically, and express the preferred embodiments of the utility model. They are only used to illustrate the technical ideas and features of the utility model. The purpose is to enable technicians in this field to understand the content of the utility model and implement it accordingly, but they are not limited to the utility model. The patent scope of the utility model cannot be limited only by this embodiment. That is, all equivalent changes or modifications made to the spirit disclosed by the utility model, for researchers or technicians in this field, within the structure of the utility model, the local improvements within the system and the changes and transformations between subsystems are still within the patent scope of the utility model. At present, the technical solution of this application has been pilot-tested, that is, a small-scale experiment of the product before large-scale mass production; after the pilot test, a user survey was conducted in a small range, and the survey results showed that the user satisfaction was high; now we are preparing for the formal production of the product for industrialization, including intellectual property risk warning surveys.

Claims

1. A desulfurization absorption tower efficiency enhancement device, characterized in that: The invention comprises a multiphase flow intensification rotary shearing and turbulent flow unit (8) arranged at the upper part of a tower body (1) of a first-stage absorption tower, wherein the multiphase flow intensification rotary shearing and turbulent flow unit (8) is arranged between a spray layer and a flue gas inlet in the absorption tower, and the multiphase flow intensification rotary shearing and turbulent flow unit (8) comprises a horizontal mounting plate (11) and a turbulent flow module (10) arranged on the mounting plate (11); the turbulent flow module (10) comprises an inner cylinder (17), an intermediate cylinder (15) and an outer cylinder (13) which are sequentially sleeved outside the inner cylinder (17). The outer cylinder (13) is vertically penetrated and fixedly connected to the mounting plate (11); first blades (14) are evenly distributed along the circumferential direction between the intermediate cylinder (15) and the outer cylinder (13); second blades (16) are evenly distributed along the circumferential direction between the inner cylinder (17) and the intermediate cylinder (15); the first blades (14) and the second blades (16) are both inclined; the outer cylinder (13), the first blades (14), the intermediate cylinder (15), the second blades (16) and the inner cylinder (17) are fixedly connected in sequence.

2. A desulfurization absorption tower efficiency enhancement device according to claim 1, characterized in that: The first blade (14) and the second blade (16) are inclined in opposite directions, and under the action of the first blade (14) and the second blade (16), the flue gas in the absorption tower rotates in opposite directions after passing through the first blade (14) and the second blade (16).

3. A desulfurization absorption tower efficiency enhancement device according to claim 2, characterized in that: The inclination angles of the first blade (14) and the second blade (16) are between 30 degrees and 60 degrees.

4. A desulfurization absorption tower efficiency enhancement device according to claim 1, characterized in that: The outer cylinder (13), the middle cylinder (15) and the inner cylinder (17) are coaxial.

5. A desulfurization absorption tower efficiency enhancement device according to claim 1, characterized in that: A conical cap (18) is fixedly disposed on the inner cylinder (17), and a large end of the conical cap (18) is fixedly connected to the top end of the inner cylinder (17).

6. A desulfurization absorption tower efficiency enhancement device according to claim 1, characterized in that: It also comprises a large flat liquid retention unit (6) arranged on the upper part of the tower body (1) of the second-stage absorption tower, the large flat liquid retention unit (6) comprising a horizontal bottom plate fixedly arranged in the tower body (1), the interior of the tower body (1) being divided into upper and lower parts by the bottom plate, and the bottom plate having flow holes distributed thereon.

7. A desulfurization absorption tower efficiency enhancement device according to claim 6, characterized in that: The diameter of the flow hole is greater than or equal to 35 mm.

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