Gypsum flushing device for wet desulfurization tower flue gas inlet

Abstract

The utility model discloses a kind of wet desulphurization tower flue gas entrance gypsum washing devices, including flushing mechanism and entrance flue, the main pipeline is the lateral section of the U-shaped structure matched with the entrance flue, the main pipeline is equipped with branch pipe in the side of entrance flue inner wall, the branch pipe end is equipped with nozzle, the main pipeline is connected with flushing water tank by connecting pipe, valve and delivery pump are equipped on the connecting pipe, the flushing water tank is connected with reagent dosing device, scale inhibitor is equipped in the reagent dosing device;The utility model is by the main pipeline design into U shape, branch pipe and spray head are covered to all gypsum easy accumulation area, guarantee flushing area overall coverage bottom plate surface, there is no flushing dead angle, and can guarantee that flushing water has enough pressure and flow, flushing effect is good, effectively remove gypsum at dry-wet interface, by timely removing gypsum at flue gas entrance, guarantee that flue gas and desulfurization slurry are fully contacted, improve desulfurization efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of wet desulfurization tower flushing equipment, and in particular to the technical field of gypsum flushing device for flue gas inlet of wet desulfurization tower. Background Technology

[0002] In wet flue gas desulfurization systems, when flue gas enters through the desulfurization tower inlet, pollutants such as sulfur dioxide in the flue gas react with limestone slurry to form gypsum, which easily accumulates at the dry-wet interface at the inlet. In existing technologies, although there are flushing devices to remove gypsum, there are problems such as incomplete flushing, easy clogging, and poor material corrosion resistance, which affect desulfurization efficiency and stable system operation.

[0003] The patent document CN222970553U discloses a flushing device and flushing system for the inlet flue of a desulfurization absorption tower. The flushing device is only set with one row of branch pipes, which is unreasonable and results in incomplete flushing coverage, with some areas not being flushed. Moreover, the cost of modifying the flushing device is high, which increases the burden on enterprises. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art by proposing a gypsum flushing device for the flue gas inlet of a wet desulfurization tower, which can solve the above problems.

[0005] To achieve the above objectives, this utility model proposes a gypsum flushing device for the flue gas inlet of a wet desulfurization tower, comprising a flushing mechanism and an inlet flue. The main pipe has a U-shaped structure matching the transverse cross-section of the inlet flue. A branch pipe is provided on the side of the main pipe near the inner wall of the inlet flue, and a nozzle is provided at the end of the branch pipe. The main pipe is connected to a flushing water tank through a connecting pipe, and a valve and a delivery pump are provided on the connecting pipe. The flushing water tank is connected to a chemical dosing device, which contains a scale inhibitor. The main pipe includes a horizontal pipe, and vertical pipes are connected to both ends of the horizontal pipe. A base plate is provided at the bottom of the inlet flue, and the horizontal pipe is positioned corresponding to the base plate. The two vertical pipes are positioned corresponding to the two inner side walls of the inlet flue.

[0006] Preferably, the nozzle is integrally formed by pressing the end of the branch pipe, and the nozzle is provided with an elongated flushing slit.

[0007] Preferably, the width of the flushing slit is 6 mm.

[0008] Preferably, the branch pipe is perpendicular to the central axis of the main pipe, and the central axis of the branch pipe forms an angle of 30-60° with the base plate.

[0009] Preferably, the included angle is 45°.

[0010] Preferably, the spacing between the nozzles is set between 300mm and 600mm.

[0011] The beneficial effects of this utility model are as follows: By designing the main pipeline in a U-shape, this utility model covers all areas prone to gypsum accumulation with branch pipes and nozzles, ensuring that the flushing area fully covers the bottom plate surface, eliminating any dead corners in the flushing process. It also ensures sufficient pressure and flow rate of the flushing water, resulting in excellent flushing performance and effective removal of gypsum at the wet-dry interface. Timely removal of gypsum at the flue gas inlet ensures full contact between the flue gas and the desulfurization slurry, improving desulfurization efficiency. Adding a scale inhibitor to the flushing water tank effectively suppresses scaling, reducing equipment maintenance frequency and costs. Furthermore, by flattening the end of the branch pipe into a slit to serve as a nozzle, this utility model eliminates the need to purchase pre-made nozzles, reducing equipment costs.

[0012] The features and advantages of this utility model will be described in detail through embodiments and accompanying drawings. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the branch pipe installation of this utility model;

[0015] Figure 3 This is a schematic diagram of the nozzle of this utility model.

[0016] In the diagram: 1. Main pipe; 2. Branch pipe; 3. Nozzle; 4. Valve; 5. Pump; 6. Flue water tank; 7. Chemical dosing device; 8. Flue; 9. Base plate; 10. Flue joint. Detailed Implementation

[0017] See Figure 1 , Figure 2 , Figure 3 A gypsum flushing device for the flue gas inlet of a wet desulfurization tower includes a flushing mechanism and an inlet flue 8. The flushing mechanism includes a main pipe 1, which has a U-shaped structure that matches the transverse cross-section of the inlet flue 8. A branch pipe 2 is provided on the side of the main pipe 1 near the inner wall of the inlet flue 8, and a nozzle 3 is provided at the end of the branch pipe 2. The main pipe 1 is connected to a flushing water tank 6 through a connecting pipe. A valve 4 and a delivery pump 5 are provided on the connecting pipe. The flushing water tank 6 is connected to a chemical dosing device 7, which contains a scale inhibitor.

[0018] The nozzle 3 is integrally formed by pressing the end of the branch pipe 2, and the nozzle 3 is provided with a long strip-shaped flushing slit 10.

[0019] The width of the flushing slit 10 is 6 mm.

[0020] The width of the flushing slit can be adjusted according to the flushing water pressure.

[0021] The main pipe 1 includes a horizontal pipe, with vertical pipes connected to both ends of the horizontal pipe. The bottom of the inlet flue 8 is provided with a base plate 9, the horizontal pipe is set corresponding to the base plate 9, and the two vertical pipes are set corresponding to the two inner side walls of the inlet flue 8.

[0022] The connecting pipe is connected to the horizontal pipe.

[0023] In practical implementation, the U-shaped arrangement and diameter of the main pipeline 1 are first determined based on the actual size and shape of the flue gas inlet duct 8 of the wet desulfurization tower. The main pipeline 1 is made of 2205 material, which has good corrosion resistance and strength.

[0024] The branch pipe 2 is perpendicular to the central axis of the main pipe 1, and the central axis of the branch pipe 2 forms an angle of 30-60° with the base plate 9.

[0025] The optimal angle is 45°.

[0026] The spacing between the nozzles 3 is set between 300mm and 600mm.

[0027] The scale inhibitor is added to the flushing water tank through a chemical dosing device and mixed evenly with water in the flushing water tank to prepare a flushing solution containing the scale inhibitor, such as polyaspartic acid (PASP) with a mass concentration of 0.3%~0.8% or mercaptobenzothiazole (MBT) with a mass concentration of 0.05%~0.1%. The flushing solution flows through the main pipe, branch pipe and nozzles, and is sprayed out from the flushing seam to flush the upper surface of the base plate, effectively removing gypsum deposits at the flue gas inlet. It can effectively remove gypsum deposits, improve desulfurization efficiency and system stability, and is suitable for various wet flue gas desulfurization systems.

[0028] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A gypsum flushing device for the flue gas inlet of a wet desulfurization tower, characterized in that: The system includes a flushing mechanism and an inlet flue (8). The flushing mechanism includes a main pipe (1), which has a U-shaped structure that matches the transverse cross-section of the inlet flue (8). A branch pipe (2) is provided on one side of the main pipe (1) near the inner wall of the inlet flue (8). A nozzle (3) is provided at the end of the branch pipe (2). The main pipe (1) is connected to a flushing water tank (6) through a connecting pipe. A valve (4) and a delivery pump (5) are provided on the connecting pipe. The main pipe (1) includes a horizontal pipe, and vertical pipes are connected to both ends of the horizontal pipe. A base plate (9) is provided at the bottom of the inlet flue (8). The horizontal pipe is set corresponding to the base plate (9), and the two vertical pipes are set corresponding to the two inner walls of the inlet flue (8).

2. The wet desulfurization tower flue gas inlet gypsum flushing device as described in claim 1, characterized in that: The nozzle (3) is integrally formed by pressing the end of the branch pipe (2), and the nozzle (3) is provided with a long strip-shaped flushing slit (10).

3. The wet desulfurization tower flue gas inlet gypsum flushing device as described in claim 2, characterized in that: The width of the flushing slit (10) is 6 mm.

4. The wet desulfurization tower flue gas inlet gypsum flushing device as described in claim 1, characterized in that: The branch pipe (2) is perpendicular to the central axis of the main pipe (1), and the central axis of the branch pipe (2) forms an angle of 30-60° with the base plate (9).

5. The wet desulfurization tower flue gas inlet gypsum flushing device as described in claim 4, characterized in that: The included angle is 45°.

6. The wet desulfurization tower flue gas inlet gypsum flushing device as described in claim 1, characterized in that: The spacing between the nozzles (3) is set between 300mm and 600mm.

7. The wet desulfurization tower flue gas inlet gypsum flushing device as described in claim 1, characterized in that: The flushing water tank (6) is connected to a chemical dosing device (7), which contains a scale inhibitor.

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