Boiler desulfurization system

Abstract

The utility model relates to the technical field of boiler desulfurization, and discloses a boiler desulfurization system which comprises an oxidation tower body, the oxidation tower body is connected with a second drainage ditch, the oxidation tower body is connected with a third drainage ditch, the second drainage ditch is connected with a first circulating slurry pump, and the third drainage ditch is connected with a second circulating slurry pump. The oxidation tower body is connected with a first spray head, a second spray head and an overflow pipe opening, the overflow pipe opening is connected with an overflow box, the overflow box is connected with a first drainage ditch, the first drainage ditch is connected with an overflow slurry pump, and the overflow slurry pump is connected with a circulating slurry box. According to the device disclosed by the utility model, through the matching of the screw feeder I, the prefabricated slurry box, the grouting pump, the oxidation tower body, the spray head I and the like, calcium carbonate replaces calcium hydroxide to serve as a desulfurizing agent, and the consumption cost of auxiliary materials is reduced.

Description

Technical Field

[0001] This utility model relates to the field of boiler desulfurization technology, and in particular to boiler desulfurization systems. Background Technology

[0002] Boiler desulfurization technology is mainly used to reduce harmful gases, especially sulfur dioxide, produced during boiler combustion, thereby reducing environmental pollution. Traditional desulfurization technologies often use calcium hydroxide as a desulfurizing agent, utilizing its absorption properties to adsorb sulfur dioxide in flue gas and convert it into gypsum. This process is typically carried out through a wet desulfurization system, where the desulfurizing agent (calcium hydroxide) comes into full contact with the flue gas within the desulfurization tower, undergoing an absorption reaction to remove sulfur dioxide. However, the use of calcium hydroxide as a desulfurizing agent suffers from high costs and significant resource consumption. Utility Model Content

[0003] To overcome the above shortcomings, this utility model provides a boiler desulfurization system, which aims to improve the problem of high auxiliary material consumption costs in existing boiler desulfurization systems that use calcium hydroxide as a desulfurizing agent.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a boiler desulfurization system, including an oxidation tower body, a second drainage ditch and a third drainage ditch on the right side of the oxidation tower body, a circulating slurry pump 1 on the right side of the second drainage ditch and a second circulating slurry pump 2 on the right side of the third drainage ditch, a nozzle 1 and a nozzle 2 fixedly connected inside the oxidation tower body, and an overflow pipe fixedly connected to the left side of the oxidation tower body, the overflow pipe being located away from the oxidation tower body. An overflow box is fixedly connected to one end of the container. A drainage ditch is provided on the left side of the overflow box. An overflow slurry pump is provided on the left side of the drainage ditch. A circulating slurry tank is provided on the left side of the overflow slurry pump. A self-slurry water replenishment tank is provided on the upper part of the circulating slurry tank. A grouting pump is provided on the upper left side of the circulating slurry tank. A pre-made slurry tank is provided on the left side of the grouting pump. A screw feeder is fixedly connected to the upper part of the pre-made slurry tank. A calcium hydroxide powder silo is provided on the upper part of the screw feeder. A self-slurry water replenishment tank is provided on the upper part of the pre-made slurry tank.

[0005] As a further description of the above technical solution:

[0006] A desulfurization tank is located on the upper right side of the pre-made slurry tank. A flushing water storage tank is located on the right side of the desulfurization tank. A water pump is located on the right side of the flushing water storage tank. An induced draft fan is located on the upper right side of the desulfurization tank.

[0007] As a further description of the above technical solution:

[0008] A second screw feeder is fixedly connected to the upper part of the circulating slurry tank, and a calcium carbonate powder silo is provided on the upper part of the second screw feeder.

[0009] As a further description of the above technical solution:

[0010] A dust collector is fixedly connected to the top of the calcium hydroxide powder silo.

[0011] As a further description of the above technical solution:

[0012] A slurry agitator is fixedly connected to the upper part of the pre-made slurry tank, and a sewage discharge open filter is fixedly connected to the left side of the pre-made slurry tank.

[0013] As a further description of the above technical solution:

[0014] An oxidation tower agitator is fixedly connected inside the oxidation tower body.

[0015] As a further description of the above technical solution:

[0016] The upper part of the oxidation tower body is fixedly connected to a flue gas chimney, and the right side of the circulating slurry tank is fixedly connected to a sewage discharge open filter II.

[0017] As a further description of the above technical solution:

[0018] A dust collector is fixedly connected to the top of the calcium carbonate powder silo.

[0019] This utility model has the following beneficial effects:

[0020] In this invention, calcium hydroxide is fed into a pre-prepared slurry tank as a desulfurizing agent via a screw feeder to prepare a slurry with a concentration of 10%-30% as an absorbent. This slurry is then injected into the oxidation tower body via a grouting pump. The oxidation tower body atomizes and sprays the absorbent slurry through nozzles one and two. The original flue gas comes into full contact with the absorbent, and a mass transfer and absorption reaction occurs, ultimately producing gypsum. This allows calcium carbonate to replace calcium hydroxide as a desulfurizing agent, reducing the cost of auxiliary materials. Attached Figure Description

[0021] Figure 1 This is a flowchart of the boiler desulfurization system proposed in this utility model.

[0022] Legend:

[0023] 1. Oxidation tower body; 2. Pre-made slurry tank; 3. Self-made slurry water replenishment tank; 4. Circulating slurry pump; 5. Oxidation tower agitator; 6. Calcium hydroxide powder silo; 7. Silo top dust collector; 8. Screw feeder; 9. Open filter for wastewater discharge; 10. Slurry agitator; 11. Circulating slurry pump; 12. Grouting pump; 13. Flushing water storage tank; 14. Exhaust fan; 15. Calcium carbonate powder silo; 6. Dust collector on top of silo (II); 17. Screw feeder (II); 18. Water pump; 19. Self-filling slurry tank (II); 20. Circulating slurry tank; 21. Open filter for sewage discharge (II); 22. Overflow slurry pump; 23. Drainage ditch (I); 24. Overflow box; 25. Overflow pipe; 26. Flue gas to chimney; 27. Drainage ditch (II); 28. Drainage ditch (III); 29. ​​Nozzle (I); 30. Nozzle (II); 31. Desulfurization tank. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Reference Figure 1This utility model provides an embodiment of a boiler desulfurization system, including an oxidation tower body 1. A second drainage ditch 27 and a third drainage ditch 28 are provided on the right side of the oxidation tower body 1. A circulating slurry pump 4 is located on the right side of the second drainage ditch 27, and a second circulating slurry pump 11 is located on the right side of the third drainage ditch 28. A first nozzle 29 and a second nozzle 30 are fixedly connected inside the oxidation tower body 1. The system connects the first nozzle 29 with the second nozzle 30. The absorbent slurry is atomized and sprayed out. A self-priming slurry water tank 19 is installed on the upper part of the circulating slurry tank 20. A grouting pump 12 is installed on the upper left side of the circulating slurry tank 20. A pre-prepared slurry tank 2 is installed on the left side of the grouting pump 12. A screw feeder 8 is fixedly connected to the upper part of the pre-prepared slurry tank 2. A calcium hydroxide powder silo 6 is installed on the upper part of the screw feeder 8. Calcium hydroxide powder is fed into the pre-prepared slurry tank 2 through the screw feeder 8. A self-priming slurry water tank 3 is installed on the upper part of the pre-prepared slurry tank 2. Water is replenished to the interior of the precast slurry tank 2 via the slurry replenishment tank 3. A desulfurization tank 31 is located on the upper right side of the precast slurry tank 2. A flushing water storage tank 13 is located on the right side of the desulfurization tank 31, and a water pump 18 is located on the right side of the flushing water storage tank 13. An induced draft fan 14 is located on the upper right side of the desulfurization tank 31. A screw feeder 17 is fixedly connected to the upper part of the circulating slurry tank 20. A calcium carbonate powder silo 15 is located above the screw feeder 17. The calcium carbonate powder is fed through the screw feeder 17... Calcium carbonate powder is fed into the circulating slurry tank 20. A slurry agitator 10 is fixedly connected to the upper part of the pre-made slurry tank 2. The slurry inside the pre-made slurry tank 2 is stirred by the slurry agitator 10. A sewage discharge open filter 9 is fixedly connected to the left side of the pre-made slurry tank 2. An oxidation tower agitator 5 is fixedly connected inside the oxidation tower body 1. A flue gas chimney 26 is fixedly connected to the upper part of the oxidation tower body 1. A sewage discharge open filter 21 is fixedly connected to the right side of the circulating slurry tank 20.

[0026] Calcium hydroxide is fed into the pre-mixed slurry tank 2 as a desulfurizing agent via screw feeder 8. Water is replenished to the pre-mixed slurry tank 2 via slurry water replenishment tank 3. The slurry inside the pre-mixed slurry tank 2 is stirred by slurry agitator 10, mixing calcium hydroxide and water to form a slurry with a concentration of 10%-30%, ready for use as an absorbent. Subsequently, the absorbent slurry is transported to the oxidation tower body 1 via grouting pump 12. Inside the oxidation tower body 1, the absorbent slurry is atomized and sprayed out through nozzles 29 and 30, forming fine droplets that fully contact the original flue gas. Harmful substances in the flue gas, such as SO2, SO3, and HC... l Pollutants such as HF undergo mass transfer and absorption reactions with the absorbent, effectively removing pollutants from the flue gas.

[0027] Reference Figure 1An overflow pipe 25 is fixedly connected to the left side of the oxidation tower body 1. An overflow box 24 is fixedly connected to the end of the overflow pipe 25 away from the oxidation tower body 1. A drainage ditch 23 is provided on the left side of the overflow box 24. An overflow slurry pump 22 is provided on the left side of the drainage ditch 23. A circulating slurry box 20 is provided on the left side of the overflow slurry pump 22. A dust collector 16 is fixedly connected to the top of the calcium carbonate powder silo 15. A dust collector 7 is fixedly connected to the top of the calcium hydroxide powder silo 6.

[0028] The oxidation tower body 1 introduces the overflow slurry into the overflow tank 24 through the overflow pipe 25. In the overflow tank 24, the collected overflow slurry is injected into the circulating slurry tank 20 for recycling by the overflow slurry pump 22, ensuring the effective utilization of the slurry and the continuous operation of the desulfurization process. At the same time, the dust collectors 7 and 16 on the top of the silo effectively capture and filter dust particles in the air, reducing dust pollution in the working environment, ensuring the cleanliness and safety of the production site, and improving the stability of equipment operation and the level of environmental protection.

[0029] Working principle: Calcium hydroxide is fed into the pre-mixed slurry tank 2 as a desulfurizing agent via screw feeder 8. Water is added to the pre-mixed slurry tank 2 via slurry water replenishment tank 3. The slurry inside the pre-mixed slurry tank 2 is stirred by slurry agitator 10, mixing calcium hydroxide and water to form a slurry with a concentration of 10%-30%, ready for use as an absorbent. Subsequently, the absorbent slurry is transported to the oxidation tower body 1 via grouting pump 12. Inside the oxidation tower body 1, the absorbent slurry is atomized and sprayed out through nozzles 29 and 30, forming fine droplets that fully contact the original flue gas. Harmful substances in the flue gas such as SO2, SO3, and HC are absorbed. l Pollutants such as HF undergo mass transfer and absorption reactions with the absorbent, effectively removing pollutants from the flue gas. In particular, the absorption products of SO2 undergo oxidation and neutralization reactions in the oxidation zone at the bottom of the oxidation tower body 1. The reaction rate is increased by stirring with the oxidation tower agitator 5, and gypsum is finally generated as a by-product. This realizes the use of calcium carbonate instead of calcium hydroxide as a desulfurizing agent, which not only improves the desulfurization effect but also significantly reduces the consumption cost of auxiliary materials, optimizing the economic and environmental performance of the desulfurization process. The oxidation tower body 1 introduces the overflow slurry into the overflow tank 24 through the overflow pipe 25. In the overflow tank 24, the collected overflow slurry is injected into the circulating slurry tank 20 for recycling by the overflow slurry pump 22, ensuring the effective utilization of the slurry and the continuous operation of the desulfurization process. At the same time, the dust collectors 7 and 16 on the top of the silo effectively capture and filter dust particles in the air, reducing dust pollution in the working environment, ensuring the cleanliness and safety of the production site, and improving the stability of equipment operation and the level of environmental protection.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A boiler desulfurization system, including an oxidation tower body (1), characterized in that: A second drainage ditch (27) is provided on the right side of the oxidation tower body (1), a third drainage ditch (28) is provided on the right side of the oxidation tower body (1), a first circulating slurry pump (4) is provided on the right side of the second drainage ditch (27), a second circulating slurry pump (11) is provided on the right side of the third drainage ditch (28), a first nozzle (29) is fixedly connected inside the oxidation tower body (1), a second nozzle (30) is fixedly connected inside the oxidation tower body (1), an overflow pipe (25) is fixedly connected on the left side of the oxidation tower body (1), and an overflow box (24) is fixedly connected to the end of the overflow pipe (25) away from the oxidation tower body (1). A drainage ditch (23) is provided on the left side. An overflow slurry pump (22) is provided on the left side of the drainage ditch (23). A circulating slurry tank (20) is provided on the left side of the overflow slurry pump (22). A self-slurry water replenishment tank (19) is provided on the upper part of the circulating slurry tank (20). A grouting pump (12) is provided on the upper left side of the circulating slurry tank (20). A pre-made slurry tank (2) is provided on the left side of the grouting pump (12). A screw feeder (8) is fixedly connected to the upper part of the pre-made slurry tank (2). A calcium hydroxide powder silo (6) is provided on the upper part of the screw feeder (8). A self-slurry water replenishment tank (3) is provided on the upper part of the pre-made slurry tank (2).

2. The boiler desulfurization system according to claim 1, characterized in that: A desulfurization tank (31) is provided on the upper right side of the pre-made slurry tank (2). A flushing water storage tank (13) is provided on the right side of the desulfurization tank (31). A water pump (18) is provided on the right side of the flushing water storage tank (13). An induced draft fan (14) is provided on the upper right side of the desulfurization tank (31).

3. The boiler desulfurization system according to claim 1, characterized in that: The upper part of the circulating slurry tank (20) is fixedly connected to a screw feeder (17), and a calcium carbonate powder silo (15) is provided on the upper part of the screw feeder (17).

4. The boiler desulfurization system according to claim 1, characterized in that: A dust collector (7) is fixedly connected to the top of the calcium hydroxide powder silo (6).

5. The boiler desulfurization system according to claim 1, characterized in that: A slurry agitator (10) is fixedly connected to the upper part of the pre-made slurry tank (2), and a sewage discharge open filter (9) is fixedly connected to the left side of the pre-made slurry tank (2).

6. The boiler desulfurization system according to claim 1, characterized in that: An oxidation tower agitator (5) is fixedly connected inside the oxidation tower body (1).

7. The boiler desulfurization system according to claim 1, characterized in that: The upper part of the oxidation tower body (1) is fixedly connected to the flue gas chimney (26), and the right side of the circulating slurry tank (20) is fixedly connected to the sewage discharge open filter II (21).

8. The boiler desulfurization system according to claim 3, characterized in that: The calcium carbonate powder silo (15) is fixedly connected to the top of the silo top dust collector (16).

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