Desulfurization energy-saving and efficiency-improving device

Abstract

The utility model discloses an energy-saving and efficiency-improving device for desulfurization, which relates to the field of wet desulfurization systems and comprises an absorption tower, a spraying layer is arranged in the middle of the absorption tower, an energy-saving and efficiency-improving device is arranged below the spraying layer and inside the absorption tower, and a demister is arranged above the spraying layer and inside the absorption tower. The energy-saving and efficiency-improving device comprises a unit module, a shell is arranged on the outer surface of the unit module, liquid holding grooves are connected to the two sides of the bottom of a baffle and located in the shell in a penetrating mode, liquid drainage holes are formed in the bottoms of the liquid holding grooves, and efficiency-improving rings are arranged at the top of the unit module. The energy-saving and efficiency-improving device disclosed by the utility model is arranged between the inlet of the absorption tower and the first spraying layer, and flue gas collides and disturbs slurry from top to bottom to form convection impact when passing through the energy-saving and efficiency-improving device, so that the gas-liquid contact area is increased, and the reaction effect is enhanced, thereby achieving the purposes of quickly desulfurizing and deacidifying and improving the reaction effect.

Description

Technical Field

[0001] The utility model relates to the field of wet desulfurization systems, in particular to a desulfurization energy-saving and efficiency-enhancing device. Background Art

[0002] The wet desulfurization absorber is one of the equipment used to remove sulfur dioxide (SO2) from industrial exhaust gas. It is one of the core components in the desulfurization system and adopts the wet desulfurization process. In this process, the flue gas passes through the absorber and contacts with the absorption liquid (usually an alkaline solution such as limestone slurry or ammonia water), and the sulfur dioxide will be dissolved in the absorption liquid to form sulfuric acid or sulfite.

[0003] The wet desulfurization absorption towers in the prior art are generally empty towers, packed towers or porous distributors. The wet desulfurization absorption tower is usually designed as a spray tower or a packed tower. The spray tower sprays the absorption liquid to make it fully contact with the flue gas, while the packed tower uses fillers to increase the contact surface area and enhance the gas-liquid mass transfer effect. In the absorption tower, sulfur dioxide reacts with the absorption liquid through physical absorption and chemical reaction, so that the removed flue gas is discharged from the top of the absorption tower, and the absorption liquid containing sulfur dioxide is recycled or treated through subsequent treatment. The empty tower structure has poor airflow distribution; the packed tower is easily blocked; the porous distributor has high resistance;

[0004] In view of the above problems, a desulfurization energy-saving and efficiency-improving device is proposed, which enhances the desulfurization efficiency by improving the flue gas uniformity, gas-liquid contact area and disturbance effect, thereby achieving the purpose of energy saving and efficiency improvement. Utility Model Content

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A desulfurization energy-saving and efficiency-improving device comprises an absorption tower, a spray layer is arranged in the middle of the absorption tower, an energy-saving and efficiency-improving device is arranged below the spray layer and inside the absorption tower, a demister is arranged above the spray layer and inside the absorption tower, the energy-saving and efficiency-improving device comprises a unit module, a shell is arranged on the outer surface of the unit module, a baffle is arranged inside the shell, liquid holding tanks are connected to both sides of the bottom of the baffle and inside the shell, a drainage hole is opened at the bottom of the liquid holding tank, and an efficiency-improving ring is arranged on the top of the unit module.

[0007] A further improvement of the technical solution of the utility model is that a top plate is arranged on the top of the energy-saving and efficiency-enhancing device, a grille frame is arranged on the bottom of the energy-saving and efficiency-enhancing device, and a supporting beam is arranged on the bottom of the grille frame.

[0008] A further improvement of the technical solution of the utility model is that the energy-saving and efficiency-enhancing device is composed of unit modules.

[0009] The further improvement of the technical solution of the utility model is that the gas and liquid are fully contacted and stirred in the liquid holding tank, the liquid holding tank is close to the inner wall of the shell, and a drainage hole is left at the bottom of the tank to prevent slurry from silting up.

[0010] A further improvement of the technical solution of the utility model is that a cylindrical body is arranged inside the shell.

[0011] A further improvement of the technical solution of the utility model is that the baffle is a physical dividing surface of gas and liquid, the slurry flows downward into the liquid holding tank in a waterfall shape through the baffle, and the smoke returns to the liquid holding tank through the baffle.

[0012] A further improvement of the technical solution of the utility model is that the efficiency enhancement ring arranged on the upper part of the unit module can reduce the wall flow.

[0013] A further improvement of the technical solution of the utility model is that the multiple unit modules of the energy-saving and efficiency-enhancing device are connected by a top plate and cover the gaps, so that the airflow can only pass through the inside of the unit module without short circuit.

[0014] Due to the adoption of the above technical solution, the utility model has achieved the following technical progress compared with the prior art:

[0015] The utility model provides a desulfurization energy-saving and efficiency-enhancing device, which is composed of a plurality of unit modules, the number of which is between 3 and 1000, the modules are connected by welding through the top plate, and the top plate and the absorption tower are fixed and sealed by bolts and clips. The bottom is supported by a supporting beam, which is made of square tubes. Carbon steel anti-corrosion or 316L, 2205, 2507 and other materials with good corrosion resistance can be used according to site requirements. The supporting structure is divided into cross, tic-tac-toe and other various plane support methods. The grid grid is evenly distributed on the supporting beam. The grid grid 2 is made of 316L, 2205, 2507 and other materials with good corrosion resistance. The structural height h1 is 80-200mm, and the unit modules are installed on the grid grid. The unit modules are connected to each other and do not fill the entire absorption tower flow section.

[0016] The unit module consists of a liquid holding tank, a baffle, an enhancement ring and a shell. The unit module has a height of H = 400-2500mm and a diameter of φ = 300-1000mm. The liquid holding tank 4 has a height of h2 = 100-300mm and a width of b = 90-280mm. A baffle is installed above the liquid holding tank, and the angle α between the baffle and the vertical direction is 25-35°. An enhancement ring is installed above the baffle, and the enhancement ring can be composed of 1-2. The height of the uppermost enhancement ring and the top plate of the shell is h3 = 100-300mm. The shell has a height of H = 400-2500mm and is made of materials with good corrosion resistance such as 316L, 2205, 2507, etc.

[0017] Good flue gas distribution effect: When the flue gas passes through the energy-saving and efficiency-enhancing device, it is evenly distributed through the guide plate baffle and the unit module, providing a good flow field distribution for the desulfurization gas-liquid contact in the absorption tower.

[0018] Flue gas cooling: The flue gas has a high temperature when entering the absorption tower, which is not conducive to the dissolution and absorption of SO2. After passing through the energy-saving and efficiency-enhancing device, it can quickly and comprehensively contact with the circulating slurry to achieve the effect of rapid cooling.

[0019] Improve desulfurization efficiency: The gas-liquid contact area is increased when the flue gas passes through the gas energy-saving and efficiency-enhancing device, making the SO2 in the flue gas absorbed more thoroughly and improving the utilization rate of the desulfurizer.

[0020] Reduce system resistance: Since the use of efficiency enhancement improves the desulfurization efficiency of the system, it can generally reduce the input of 1-2 spray layers compared with conventional systems, and the total system resistance can be reduced by 200-300Pa.

[0021] Reduce system energy consumption: Usually, one spray layer in the desulfurization system needs to be equipped with a high-power slurry circulation pump. The reduction in the input of the spray layer will correspondingly reduce the input of the circulation pump; at the same time, the reduction of system resistance can also reduce the operating frequency of the induced draft fan, saving energy consumption.

[0022] Can burn coal with higher sulfur content: Since the desulfurization system equipped with energy-saving and efficiency-enhancing devices has improved the desulfurization efficiency, it is applicable to a wider range of coal sulfur content. For boilers using coal as fuel, fuel cost is the largest expense. Coal with higher sulfur content will significantly reduce its operating costs, which is a significant benefit for enterprises.

[0023] The flue gas from bottom to top produces convection and reacts quickly with the slurry from top to bottom, and with the cooperation of energy-saving and efficiency-enhancing devices, the contact uniformity and contact area are improved, thereby increasing the contact reaction speed within the same reaction time.

[0024] The energy-saving and efficiency-enhancing device is installed between the absorption tower entrance and the first spray layer. When the flue gas passes through the energy-saving and efficiency-enhancing device, it collides and disturbs with the slurry from top to bottom, forming a convection impact, increasing the gas-liquid contact area, and enhancing the reaction effect, thereby achieving rapid desulfurization and deacidification and improving the reaction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the desulfurization energy-saving and efficiency-enhancing device of the utility model;

[0026] Figure 2 It is a schematic diagram of the structure of the energy-saving and efficiency-enhancing device of the utility model in a top view;

[0027] Figure 3 It is a cross-sectional view of the energy-saving and efficiency-enhancing device of the utility model;

[0028] Figure 4 This is a schematic diagram of the unit module structure of the energy-saving and efficiency-enhancing device of the utility model;

[0029] In the figure: 1. Support beam; 2. Grid frame; 3. Unit module; 4. Liquid holding tank; 5. Baffle; 6. Efficiency ring; 7. Shell; 8. Absorption tower; 9. Energy saving and efficiency improvement device; 10. Spray layer; 11. Demister; 12. Top plate; 71. Cylindrical body; 41. Drain hole. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the embodiments:

[0031] like Figure 1-4 As shown, the utility model provides a desulfurization energy-saving and efficiency-enhancing device, including an absorption tower 8, a spray layer 10 is arranged in the middle of the absorption tower 8, an energy-saving and efficiency-enhancing device 9 is arranged below the spray layer 10 and inside the absorption tower 8, and a demister 11 is arranged above the spray layer 10 and inside the absorption tower 8.

[0032] In this implementation case: the energy-saving and efficiency-enhancing device 9 is composed of a plurality of unit modules 3, the number of modules is between 3 and 1000, the modules are connected by welding through the top plate 12, the top plate 12 and the absorption tower 8 are fixed and sealed by bolts and clips, and the bottom is supported by the support beam 1, the support beam 1 is made of square tubes, and carbon steel anti-corrosion or 316L, 2205, 2507 and other materials with good corrosion resistance can be used according to site requirements. The support structure is divided into cross, tic-tac-toe and other various plane support methods. The grid grid 2 is evenly distributed on the support beam 1, and the grid grid 2 is made of 316L, 2205, 2507 and other materials with good corrosion resistance, and the structure height h1 = 80-200mm. The unit modules 3 are installed on the grid grid 2, and the unit modules 3 are connected to each other, and do not fill the entire flow section of the absorption tower 8.

[0033] like Figure 2-4As shown, the utility model provides a desulfurization energy-saving and efficiency-enhancing device, the energy-saving and efficiency-enhancing device 9 includes a unit module 3, the outer surface of the unit module 3 is provided with a shell 7, the interior of the shell 7 is provided with a baffle 5, the bottom sides of the baffle 5 and the inside of the shell 7 are connected with a liquid holding tank 4, the bottom of the liquid holding tank 4 is provided with a drainage hole 41, the top of the unit module 3 is provided with an efficiency ring 6, the top of the energy-saving and efficiency-enhancing device 9 is provided with a top plate 12, the bottom of the energy-saving and efficiency-enhancing device 9 is provided with a grid frame 2, the bottom of the grid frame 2 is provided with a supporting beam 1, and the energy-saving and efficiency-enhancing device 9 is composed of a unit module The gas and liquid are fully contacted and stirred in the liquid holding tank 4, the liquid holding tank 4 is close to the inner wall of the shell 7, and a drainage hole 41 is left at the bottom of the tank to prevent slurry from accumulating. A cylindrical barrel 71 is arranged in the shell 7, and the baffle 5 is a physical dividing surface for gas and liquid. The slurry forms a waterfall through the baffle 5 and flows downward into the liquid holding tank 4. The flue gas returns through the baffle 5 and enters the liquid holding tank 4. The efficiency enhancement ring 6 arranged on the upper part of the unit module 3 can reduce the wall flow. The multiple unit modules 3 of the energy-saving and efficiency-enhancing device 9 are connected by a top plate 12 and cover the gap, so that the airflow can only pass through the inside of the unit module 3 without short circuit.

[0034] In this embodiment: the unit module 3 is composed of a liquid holding tank 4, a baffle 5, an enhancement ring 6, and a shell 7. The unit module 3 has a height H = 400-2500 mm, a diameter φ = 300-1000 mm, a height h2 = 100-300 mm, and a width b = 90-280 mm. A baffle 5 is installed above the liquid holding tank 4, and the angle α between the baffle 5 and the vertical direction is 25-35°. A performance enhancement ring 6 is installed above the baffle 5. The performance enhancement ring 6 can be composed of 1-2 rings, wherein the height between the top performance enhancement ring 6 and the top plate of the shell 7 is h3=100-300mm, and the height of the shell 7 is H=400-2500mm. It is made of 316L, 2205, 2507 and other materials with good corrosion resistance, and has a good flue gas distribution effect. When the flue gas passes through the energy-saving and efficiency-enhancing device 9, it passes through the guide plate baffle 5 and the unit module 3 for uniform flow distribution, which provides a good flow field distribution for the desulfurization gas-liquid contact in the absorption tower 8, and the flue gas is cooled. When the flue gas enters the absorption tower 8, the temperature is relatively high, which is not conducive to the dissolution and absorption of SO2. After passing through the energy-saving and efficiency-enhancing device 9, it can quickly and comprehensively contact with the circulating slurry to achieve the effect of rapid cooling and improve the desulfurization efficiency. When the flue gas passes through the gas energy-saving and efficiency-enhancing device 9, the gas-liquid contact area is increased, so that the SO2 in the flue gas is absorbed more thoroughly. The desulfurization efficiency of the system is improved by using the efficiency enhancement device. Generally, the input of 1-2 spray layers can be reduced compared with the conventional system, and the total system resistance can be reduced by 200-300Pa, thereby reducing the energy consumption of the system. Usually, one spray layer 10 in the desulfurization system needs to be equipped with a high-power slurry circulation pump. The reduction in the input of the spray layer 10 will reduce the input of the circulation pump accordingly. At the same time, the reduction in system resistance can also reduce the operating frequency of the induced draft fan, save energy consumption, and can burn coal with a higher sulfur content. Since the desulfurization system with the energy-saving and efficiency enhancement device 9 installed has improved the desulfurization efficiency, it is more applicable to the sulfur content of the coal. For boilers using coal as fuel, fuel cost is the largest expense. Coal with a higher sulfur content will significantly reduce its operating cost, which is a significant benefit for the enterprise.

[0035] The flue gas from bottom to top generates convection and reacts quickly with the slurry from top to bottom, and with the cooperation of the energy-saving and efficiency-enhancing device 9, the contact uniformity and contact area are improved, thereby increasing the contact reaction speed within the same reaction time.

[0036] The energy-saving and efficiency-enhancing device 9 is installed between the entrance of the absorption tower 8 and the first spray layer 10. When the flue gas passes through the energy-saving and efficiency-enhancing device 9, it collides and disturbs with the slurry from top to bottom, forming a convection impact, increasing the gas-liquid contact area, and enhancing the reaction effect, thereby achieving rapid desulfurization and deacidification and improving the reaction effect.

[0037] The following is a detailed description of the working principle of the desulfurization energy-saving and efficiency-enhancing device.

[0038] like Figure 1-4 As shown, the energy-saving and efficiency-enhancing device 9 is composed of a plurality of unit modules 3, the number of modules is between 3 and 1000, the modules are welded and connected through the top plate 12, the top plate 12 and the absorption tower 8 are fixed and sealed with bolts and clips, the flue gas from bottom to top and the slurry from top to bottom produce convection and react quickly, and the contact uniformity and contact area are improved with the cooperation of the energy-saving and efficiency-enhancing device 9, and the contact reaction speed is increased within the same reaction time. The energy-saving and efficiency-enhancing device 9 is installed between the entrance of the absorption tower 8 and the first spray layer 10. During the process of passing through the energy-saving and efficiency-enhancing device 9, the flue gas collides and disturbs with the slurry from top to bottom, forming a convection impact, increasing the gas-liquid contact area, and enhancing the reaction effect, thereby achieving rapid desulfurization and deacidification, and improving the reaction effect.

[0039] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A desulfurization energy-saving and efficiency-enhancing device, comprising an absorption tower (8), characterized in that: A spray layer (10) is provided in the middle of the absorption tower (8); an energy-saving and efficiency-enhancing device (9) is provided below the spray layer (10) and located inside the absorption tower (8); a demister (11) is provided above the spray layer (10) and located inside the absorption tower (8); the energy-saving and efficiency-enhancing device (9) comprises a unit module (3); a shell (7) is provided on the outer surface of the unit module (3); a baffle (5) is provided inside the shell (7); liquid holding tanks (4) are connected to and penetrated on both sides of the bottom of the baffle (5) and located inside the shell (7); a liquid discharge hole (41) is provided at the bottom of the liquid holding tank (4); and an efficiency-enhancing ring (6) is provided on the top of the unit module (3).

2. A desulfurization energy-saving and efficiency-enhancing device according to claim 1, characterized in that: The top of the energy-saving and efficiency-enhancing device (9) is provided with a top plate (12), the bottom of the energy-saving and efficiency-enhancing device (9) is provided with a grid frame (2), and the bottom of the grid frame (2) is provided with a supporting beam (1).

3. A desulfurization energy-saving and efficiency-enhancing device according to claim 2, characterized in that: The energy-saving and efficiency-enhancing device (9) is composed of unit modules (3).

4. A desulfurization energy-saving and efficiency-enhancing device according to claim 1, characterized in that: The gas and liquid are fully contacted and stirred in the liquid holding tank (4). The liquid holding tank (4) is closely attached to the inner wall of the shell (7), and a drainage hole (41) is left at the bottom of the tank to prevent the slurry from accumulating.

5. A desulfurization energy-saving and efficiency-enhancing device according to claim 1, characterized in that: A cylindrical body (71) is arranged inside the shell (7).

6. A desulfurization energy-saving and efficiency-enhancing device according to claim 1, characterized in that: The baffle (5) is a physical dividing surface between gas and liquid. The slurry flows downward into the liquid holding tank (4) in a waterfall-like manner through the baffle (5), and the smoke returns through the baffle (5) and enters the liquid holding tank (4).

7. A desulfurization energy-saving and efficiency-enhancing device according to claim 4, characterized in that: The enhancement ring (6) arranged on the upper part of the unit module (3) can reduce the wall flow.

8. A desulfurization energy-saving and efficiency-enhancing device according to claim 1, characterized in that: The multiple unit modules (3) of the energy-saving and efficiency-enhancing device (9) are connected by a top plate (12) and cover the gaps, so that the airflow can only pass through the inside of the unit module (3) without causing a short circuit.

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