Flue gas desulfurization absorption tower capable of automatically spraying

Abstract

The utility model relates to the field of flue gas desulfurization equipment of a thermal power plant, in particular to an automatic spraying flue gas desulfurization absorption tower, which comprises a first absorption tower and a second absorption tower, spraying devices are arranged in the first absorption tower and the second absorption tower, and each spraying device comprises a mounting plate, a fixing sleeve, a first branch pipe, a second branch pipe and a nozzle, the fixing sleeve is arranged on the mounting plate in a penetrating mode, one end of the first branch pipe is connected with the fixing sleeve, the other end of the first branch pipe is connected with the second branch pipe, and the nozzles are arranged on the side wall of the first branch pipe and the side wall of the second branch pipe in a penetrating mode. Uniform and wide spraying coverage can be achieved, it is ensured that flue gas makes full contact with absorption liquid, the desulfurization efficiency is remarkably improved, and the content of sulfide in the flue gas is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of flue gas desulfurization technology in thermal power plants, and particularly relates to an automatic spray flue gas desulfurization absorption tower. Background Technology

[0002] The absorption towers and flue gas duct components in the desulfurization system of thermal power plants, such as demisters and anode modules, are mostly made of flammable materials. These materials are prone to causing fires due to improper operation during maintenance and system operation. In recent years, absorption tower fires have occurred frequently, causing not only economic losses to enterprises but also serious environmental impacts from the dense smoke produced, resulting in a severe negative social impact.

[0003] To reduce fire risks, existing technologies have already incorporated flame-retardant and corrosion-resistant materials to modify the interior of absorption towers and flues, and upgraded the hot work regulations during maintenance. Strict adherence to safety operating procedures is also maintained during system operation. However, due to market constraints and system operating conditions, some flammable equipment, such as demisters and anode modules, still exist within the absorption towers, posing significant safety hazards. Furthermore, excessively high flue gas temperatures not only affect desulfurization efficiency but also shorten equipment lifespan. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an automatic spray flue gas desulfurization absorption tower.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic spray flue gas desulfurization absorption tower, comprising a first absorption tower and a second absorption tower, both the first and second absorption towers being equipped with a spray device. The spray device includes an mounting plate, a fixing sleeve, a first branch pipe, a second branch pipe, and a nozzle. The fixing sleeve passes through the mounting plate. One end of the first branch pipe is connected to the fixing sleeve, and the other end is connected to the second branch pipe. The nozzle passes through the side walls of the first and second branch pipes.

[0006] Preferably, the second branch pipe is a multi-layer bushing.

[0007] Preferably, the angle at the connection between the first branch pipe and the second branch pipe is 90°.

[0008] Preferably, a smoke outlet pipe is provided between the first absorption tower and the second absorption tower, and the smoke outlet is arranged in a Z-shape.

[0009] Preferably, the side wall of the first absorption tower or the second absorption tower is provided with a smoke outlet.

[0010] Preferably, several nozzles are arranged at equal intervals on the sidewalls of the first and second branch pipes.

[0011] Preferably, the sidewalls of the first absorption tower or the second absorption tower are equipped with electrically operated valves, which are electrically connected to the first branch pipe.

[0012] Preferably, both the first and second absorption towers are equipped with temperature sensors.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] (1) The spray device in this utility model adopts a design of a second branch pipe with a multi-layer bushing and nozzles arranged at equal intervals, which can achieve uniform and wide spray coverage, ensure full contact between flue gas and absorbent liquid, significantly improve desulfurization efficiency, and reduce the sulfide content in flue gas. Spray devices are installed in both the first and second absorption towers. With the help of thermometers and electric switch valves, the spray system can be automatically started when the flue gas temperature is too high, quickly reduce the flue gas temperature, effectively reduce the fire hazard caused by high temperature, and ensure the safe operation of the equipment.

[0015] (2) The first and second branch pipes in this utility model are connected at a 90° angle, and the flue gas outlet pipe is designed in a Z-shape, making the overall structure more compact, saving equipment installation space, optimizing the flue gas flow direction, and improving the smoothness of system operation. The spray device is electrically connected to the electric switch valve, and combined with the real-time monitoring of the thermometer, it realizes the one-button automatic start and stop function, which is easy to operate, responds quickly, reduces manual intervention, and improves the automation level and operating efficiency of the system. Through the rapid cooling function of the spray system, the damage of high temperature to the internal equipment of the absorption tower (such as the demister, anode module, etc.) is reduced, the service life of the equipment is extended, and the maintenance cost is reduced. Attached Figure Description

[0016] Fig. 1 This is a three-dimensional structural diagram of the present invention;

[0017] Fig. 2 This is a front view structural diagram of the present utility model;

[0018] Fig. 3 This is a schematic diagram of the spray device structure;

[0019] In the diagram: 1. First absorption tower; 2. Second absorption tower; 3. Spraying device; 4. Mounting plate; 5. Fixing sleeve; 6. First branch pipe; 7. Second branch pipe; 8. Nozzle; 9. Smoke outlet pipe; 10. Smoke outlet. Detailed Implementation

[0020] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0022] Please see Figs. 1-3 To achieve the above objectives, this embodiment provides an automatic spray flue gas desulfurization absorption tower, including a first absorption tower 1 and a second absorption tower 2, located in the middle section of the flue gas treatment system. After pretreatment, the flue gas enters the absorption tower for desulfurization. The first absorption tower 1 and the second absorption tower 2 are used for flue gas desulfurization. A desulfurizing agent (such as limestone slurry) is sprayed into the tower through a spraying device 3 to react chemically with sulfur dioxide in the flue gas, thereby achieving the desulfurization effect.

[0023] The spray device 3 is installed inside the absorption tower to evenly spray the desulfurizing agent into the tower, ensuring that the flue gas and the desulfurizing agent are in full contact, thereby improving the desulfurization efficiency.

[0024] The mounting plate 4 in the spray device 3 is fixed to the inner wall of the absorption tower, supports the entire spray device 3, and is used to fix other components of the spray device 3 to ensure the stability of the spray device 3.

[0025] The fixing sleeve 5 passes through the mounting plate 4 and connects to the first branch pipe 6, connecting the mounting plate 4 and the first branch pipe 6 to ensure the firmness of the spray device 3.

[0026] One end of the first branch pipe 6 is connected to the fixed sleeve 5, and the other end is connected to the second branch pipe 7. The second branch pipe 7 is a multi-layer bushing pipe located at the end of the first branch pipe 6. It is used to transport the desulfurizing agent and ensure that the desulfurizing agent can be evenly distributed to each nozzle 8.

[0027] Nozzles 8 are installed through the side walls of the first branch pipe 6 and the second branch pipe 7, and are arranged at equal intervals. Nozzles 8 spray the desulfurizing agent in the form of mist, increasing the contact area with the flue gas and improving the reaction efficiency.

[0028] In other embodiments, the flue gas outlet pipe 9 is connected to the first absorption tower 1 and the second absorption tower 2 and is arranged in a Z-shape to reduce the flow resistance of the flue gas. The flue gas outlet pipe 9 discharges the flue gas that has undergone desulfurization treatment from the absorption tower.

[0029] In other embodiments, the flue gas outlet 10 is opened on the side wall of the first absorption tower 1 or the second absorption tower 2, and the flue gas outlet 10 discharges the flue gas that has undergone desulfurization treatment.

[0030] In other embodiments, an electrically operated valve is installed on the side wall of the first absorption tower 1 or the second absorption tower 2 and is electrically connected to the first branch pipe 6. The electrically operated valve controls the flow rate of the desulfurizing agent to ensure the normal operation of the spraying device 3.

[0031] In other embodiments, temperature sensors are installed inside the first absorption tower 1 and the second absorption tower 2. The temperature sensors monitor the temperature inside the absorption towers to ensure that the desulfurization reaction proceeds within a suitable temperature range.

[0032] In other embodiments, the second branch pipe 7 adopts a multi-layer bushing design, which can increase the uniformity of desulfurizer distribution and improve desulfurization efficiency. The multi-layer bushing can also reduce pressure loss within the pipeline and lower energy consumption.

[0033] In other embodiments, the connection between the first branch pipe 6 and the second branch pipe 7 is at a 90° angle, which can reduce turbulence in the pipeline, ensure the stability of the desulfurizing agent flow, and facilitate installation and maintenance.

[0034] In other embodiments, the flue gas outlet duct 9 is arranged in a Z-shape, which can reduce the resistance to flue gas flow and lower energy consumption. At the same time, the Z-shaped design can also increase the residence time of the flue gas, further improving the desulfurization effect.

[0035] In other embodiments, the electrically operated valve can automatically adjust the flow rate according to the flue gas flow rate and the demand for desulfurizer, thereby achieving intelligent control and improving the automation level of the system.

[0036] In other embodiments, the thermometer can monitor the temperature inside the absorption tower in real time and feed the data back to the control system to ensure that the desulfurization reaction takes place within the optimal temperature range and improve desulfurization efficiency.

[0037] Working principle:

[0038] Flue gas entry: After pretreatment, the flue gas enters the first absorption tower 1.

[0039] Spray desulfurization: Spray device 3 evenly sprays the desulfurizing agent into the tower, and the flue gas comes into full contact with the desulfurizing agent, undergoing a chemical reaction to remove sulfur dioxide from the flue gas.

[0040] Flue gas discharge: The flue gas after desulfurization treatment enters the second absorption tower 2 through the flue gas outlet pipe 9 for secondary desulfurization treatment to ensure the desulfurization effect.

[0041] Temperature control: The thermometer monitors the temperature inside the absorption tower in real time to ensure that the desulfurization reaction takes place within a suitable temperature range.

[0042] Flow regulation: The electric switch valve automatically adjusts the flow rate according to the flue gas flow rate and the demand for desulfurizing agent to ensure the normal operation of the spray device 3.

[0043] Flue gas emission: The flue gas that has undergone secondary desulfurization treatment is discharged through flue outlet 10 and enters the subsequent treatment stage or is directly emitted.

[0044] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. An automatic spray flue gas desulfurization absorption tower, characterized in that: The device includes a first absorption tower and a second absorption tower. Both the first and second absorption towers are equipped with a spraying device. The spraying device includes a mounting plate, a fixing sleeve, a first branch pipe, a second branch pipe, and a nozzle. The fixing sleeve passes through the mounting plate. One end of the first branch pipe is connected to the fixing sleeve, and the other end is connected to the second branch pipe. The nozzle passes through the side wall of the first and second branch pipes.

2. The automatic spray flue gas desulfurization absorption tower according to claim 1, characterized in that: The second branch pipe is a multi-layer bushing.

3. The automatic spray flue gas desulfurization absorption tower according to claim 2, characterized in that: The angle at the connection between the first branch pipe and the second branch pipe is 90°.

4. The automatic spray flue gas desulfurization absorption tower according to claim 1, characterized in that: A smoke outlet pipe is provided between the first absorption tower and the second absorption tower, and the smoke outlet is arranged in a Z-shape.

5. The automatic spray flue gas desulfurization absorption tower according to claim 4, characterized in that: The first or second absorption tower has a smoke outlet on its side wall.

6. The automatic spray flue gas desulfurization absorption tower according to claim 1, characterized in that: Several nozzles are arranged at equal intervals on the side walls of the first and second branch pipes.

7. The automatic spray flue gas desulfurization absorption tower according to claim 1, characterized in that: The sidewalls of the first absorption tower or the second absorption tower are equipped with electrically operated valves, which are electrically connected to the first branch pipe.

8. The automatic spray flue gas desulfurization absorption tower according to claim 7, characterized in that: Temperature sensors are installed in both the first and second absorption towers.

Images