Flue gas desulfurization device
By introducing cooling air into the exhaust pipe of the flue gas desulfurization device and cooling with a static mixer, the problem of excessive flue gas temperature and water vapor mixing in traditional methods is solved, and the effective reduction of flue gas temperature and stable operation of the system is achieved.
Patent Information
- Application Number
- CN202421632502.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-11
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2034-07-11
AI Technical Summary
When traditional flue gas desulfurization towers treat flue gas, the smoke exhaust temperature will abnormally increase. Direct introduction of bag dust collector will cause thermal damage to the filter bag, and the wet spray cooling method can easily cause excessive water vapor to be mixed into the smoke, increasing operating costs.
A flue gas desulfurization device is designed to introduce cooling air into the smoke exhaust pipe, and a static mixer is used to achieve mixed cooling of the flue gas, reduce the temperature of the flue gas after desulfurization, avoid high temperatures from damaging the dust collector, and reduce the mixing of water vapor.
It effectively reduces the temperature of the flue gas after desulfurization, prevents the dust collector filter bag from being damaged due to high temperature, avoids the problem of excessive water vapor mixed into the smoke, and ensures the stable and efficient operation of the system.
Smart Images
Figure CN222765868U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of desulfurization and smoke exhaust, and specifically relates to a flue gas desulfurization device. Background Art
[0002] Desulfurization, denitrification and dust removal are both key steps in flue gas treatment, but the order varies depending on the situation. Generally speaking, flue gas is first desulfurized and denitrated, and then dusted. This is because desulfurization and denitrification can effectively remove gases such as SO2 and NOx, reduce the chance of dust and other particles adhering to the gas, reduce the pressure and burden of dust removal equipment, and protect the normal operation of dust removal equipment. If dust removal is performed first, since gases such as SO2 and NOx in the flue gas have not been removed, they will corrode the dust collector, resulting in a shortened life of the dust collector.
[0003] However, during the flue gas desulfurization process, the traditional flue gas desulfurization tower often causes abnormal rise in exhaust gas temperature due to unfavorable factors such as excessively high reaction temperature or insufficient air supply. If this high-temperature flue gas is directly introduced into the bag filter, it will cause significant thermal damage to the filter bags, thereby increasing operating costs. In response to this problem, traditional high-temperature flue gas treatment methods mostly use spray wet cooling, but this method easily causes water vapor to mix into the flue gas containing a large amount of dust, and then causes dust to adhere to the surface of the filter bag during the dust removal process of the bag filter, which is difficult to remove, further increasing operating costs. In view of the above situation, the utility model specifically proposes an optimized flue gas desulfurization device, which aims to significantly reduce the temperature of the flue gas after desulfurization, effectively prevent the risk of damage to the filter bags in the bag filter due to high temperature, and avoid excessive water vapor mixing in the smoke, ensuring that the entire system can operate stably and efficiently.
[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content
[0005] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: a flue gas desulfurization device, comprising a tower body and a control mechanism, the top air outlet of the tower body is connected to a smoke exhaust pipe, a first induced draft fan is installed at the connection between the smoke exhaust pipe and the top air outlet of the tower body, a smoke exhaust mechanism is installed on the smoke exhaust pipe body, the smoke exhaust mechanism comprises a static mixer and a straight exhaust pipe, both ends of the static mixer and the straight exhaust pipe are installed with electric three-way reversing air valves, the confluence of the two electric three-way reversing air valves are respectively connected to the front section and the rear section of the smoke exhaust pipe, one side of the static mixer is connected to a cooling air inlet pipe, one end of the cooling air inlet pipe is connected to a second induced draft fan, the control mechanism comprises a controller and a temperature detection sensor, the temperature detection sensor is installed on the front section of the smoke exhaust pipe body located at the smoke inlet of the static mixer, and the controller is electrically connected to the temperature detection sensor, the second induced draft fan motor driver and the electric three-way reversing air valve motor driver respectively.
[0006] As a preferred technical solution of the utility model, the smoke exhaust pipe and the straight exhaust pipe are both hollow cylinders, and the inner wall of the smoke exhaust pipe is provided with an anti-corrosion coating.
[0007] As a preferred technical solution of the utility model, a cleaning port is provided on the side wall of the static mixer, and a sealing cover is installed on the cleaning port.
[0008] As a preferred technical solution of the utility model, the smoke exhaust pipe is provided with a sewage outlet on its pipe body located at the bottom of the static mixer, and a cover plate is installed at the sewage outlet.
[0009] As a preferred technical solution of the utility model, flanges are welded at the ports of the smoke exhaust pipe, the static mixer and the straight exhaust pipe.
[0010] As a preferred technical solution of the utility model, the static mixer is located on one side of the cooling air inlet pipe and is welded with a support, and the second induced draft fan is fixed on the support.
[0011] Compared with the prior art, the utility model has the following beneficial effects: the utility model aims to achieve mixed cooling of flue gas by continuously introducing cold air into the exhaust pipe of the desulfurization tower with the help of a static mixer, thereby significantly reducing the temperature of the flue gas after desulfurization. This is to effectively prevent the risk of damage to the filter bags in the bag filter due to high temperature and ensure the smooth progress of the dust removal process. Compared with the existing wet spray cooling technology, the utility model avoids the problem of too much water vapor mixed in the smoke, thereby ensuring the stable and efficient operation of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:
[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0014] Figure 2 It is a schematic diagram of the structure of A in the utility model;
[0015] In the figure: 1. tower body; 2. smoke exhaust pipe; 3. first induced draft fan; 4. static mixer; 5. cooling air inlet pipe; 6. second induced draft fan; 7. temperature detection sensor; 8. cleaning port; 9. flange; 10. support; 11. sewage outlet; 12. straight exhaust pipe; 13. electric three-way reversing air valve. DETAILED DESCRIPTION
[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0017] Example
[0018] See also Figure 1-2 The utility model provides the following technical solutions: a flue gas desulfurization device, comprising a tower body 1 and a control mechanism. The top air outlet of the tower body 1 realizes flue gas discharge through a smoke exhaust pipe 2, and a first induced draft fan 3 is arranged at the connection between the smoke exhaust pipe 2 and the top air outlet of the tower body 1 to ensure smooth exhaust of the smoke. A smoke exhaust mechanism is arranged on the exhaust pipe 2, which includes a static mixer 4 and a straight exhaust pipe 12, and both ends of the two are equipped with an electric three-way reversing air valve 13 to realize flexible switching of the smoke exhaust path. Among them, the confluence of the two electric three-way reversing air valves 13 are respectively connected to the front section and the rear section of the smoke exhaust pipe 2 to ensure that the smoke can be effectively guided when needed. In addition, a cooling air inlet pipe 5 is connected to one side of the static mixer 4, and one end of the cooling air inlet pipe 5 is connected to the second induced draft fan 6, in order to reduce the exhaust temperature by introducing cooling air. The control mechanism includes a controller and a temperature detection sensor 7, and the temperature detection sensor 7 is installed in the pipe section before the smoke inlet of the static mixer 4 in the exhaust pipe 2 to monitor the exhaust temperature in real time. The controller is electrically connected to the temperature detection sensor 7, the motor driver of the second induced draft fan 6 and the motor driver of the electric three-way reversing air valve 13, thereby realizing intelligent control of the exhaust of the entire desulfurization tower.
[0019] In order to ensure the effective discharge of smoke and ensure the corrosion resistance of the smoke exhaust pipe 2, in this embodiment, as a preferred technical solution of the utility model, the smoke exhaust pipe 2 and the straight exhaust pipe 12 are both hollow cylinders, and the inner wall of the smoke exhaust pipe 2 is provided with an anti-corrosion coating.
[0020] In order to facilitate cleaning of the interior of the static mixer 4 , in this embodiment, as a preferred technical solution of the utility model, a cleaning port 8 is opened on the side wall of the static mixer 4 , and a sealing cover is installed on the cleaning port 8 .
[0021] In order to facilitate the discharge of sewage after cleaning, in this embodiment, as a preferred technical solution of the utility model, the smoke exhaust pipe 2 is located at the bottom of the static mixer 4 and is provided with a sewage outlet 11, and a cover plate is installed at the sewage outlet 11.
[0022] In order to facilitate the connection of the smoke exhaust pipe 2, the static mixer 4 and the straight pipe 12, in this embodiment, as a preferred technical solution of the utility model, flanges 9 are welded at the ports of the smoke exhaust pipe 2, the static mixer 4 and the straight pipe 12.
[0023] In order to ensure the stability of the installation of the second induced draft fan 6 , in this embodiment, as a preferred technical solution of the utility model, a support 10 is welded to the static mixer 4 located on one side of the cooling air inlet pipe 5 , and the second induced draft fan 6 is fixed on the support 10 .
[0024] The static mixer 4 in this embodiment is a known technology that has been disclosed and widely used in daily life. It is a high-efficiency mixing device without moving parts. Its basic working mechanism is to use a mixing unit fixed in the tube to change the flow state of the fluid in the tube to achieve good dispersion and sufficient mixing between different fluids.
[0025] In summary, according to the technical solution of the utility model, the smoke dust after desulfurization treatment of the tower body 1 is first accurately guided to the front section of the smoke exhaust pipe 2 through the action of the first induced draft fan 3. In this process, the temperature detection sensor 7 continuously monitors the temperature state of the smoke dust to ensure the safety of operation. When the smoke dust temperature does not reach the preset threshold, the system will automatically introduce it directly into the rear section of the smoke exhaust pipe 2 through the straight exhaust pipe 12 and then introduce it into the bag filter to achieve efficient dust removal. However, once the temperature detection sensor 7 detects that the smoke dust temperature exceeds the preset threshold, it will quickly convert this temperature information into an electrical signal and transmit it to the controller. After the controller receives the electrical signal, the controller will first control the electric three-way reversing air valve 13 to convert the direction of the passage according to the preset algorithm and logic, and introduce the overheated smoke into the static mixer 4. At the same time, the controller will also control the motor output of the second induced draft fan 6 to guide the outside air into the static mixer 4 to achieve rapid heat dissipation and cooling of the smoke. The flue gas that has been fully mixed and cooled by the static mixer 4 is then directly introduced into the bag filter for efficient and accurate dust removal to ensure that the discharged flue gas meets environmental protection standards.
[0026] Finally, it should be noted that in the present utility model, unless otherwise clearly stipulated and limited, terms such as "installation", "setting", "connection", "fixation", and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.
[0027] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A flue gas desulfurization device, comprising a tower body (1) and a control mechanism, wherein the top air outlet of the tower body (1) is connected to a smoke exhaust pipe (2), characterized in that: A first induced draft fan (3) is installed at the connection between the smoke exhaust pipe (2) and the air outlet at the top of the tower body (1); a smoke exhaust mechanism is installed on the body of the smoke exhaust pipe (2); the smoke exhaust mechanism comprises a static mixer (4) and a straight exhaust pipe (12); electric three-way reversing air valves (13) are installed at both ends of the static mixer (4) and the straight exhaust pipe (12); the confluence ports of the two electric three-way reversing air valves (13) are respectively connected to the front section and the rear section of the smoke exhaust pipe (2); one side of the static mixer (4) is connected to a cooling air inlet pipe (5); one end of the cooling air inlet pipe (5) is connected to a second induced draft fan (6); the control mechanism comprises a controller and a temperature detection sensor (7); the temperature detection sensor (7) is installed on the body of the smoke exhaust pipe (2) at the front section of the smoke inlet of the static mixer (4); the controller is respectively electrically connected to the temperature detection sensor (7), the motor driver of the second induced draft fan (6) and the motor driver of the electric three-way reversing air valve (13).
2. A flue gas desulfurization device according to claim 1, characterized in that: The smoke exhaust pipe (2) and the straight exhaust pipe (12) are both hollow cylinders, and the inner wall of the smoke exhaust pipe (2) is provided with an anti-corrosion coating.
3. A flue gas desulfurization device according to claim 1, characterized in that: The side wall of the static mixer (4) is provided with a cleaning port (8), and a sealing cover is installed on the cleaning port (8).
4. A flue gas desulfurization device according to claim 3, characterized in that: The smoke exhaust pipe (2) is provided with a sewage outlet (11) on the pipe body located at the bottom of the static mixer (4), and a cover plate is installed at the sewage outlet (11).
5. A flue gas desulfurization device according to claim 1, characterized in that: Flanges (9) are welded at the ports of the smoke exhaust pipe (2), the static mixer (4) and the straight exhaust pipe (12).
6. A flue gas desulfurization device according to claim 1, characterized in that: The static mixer (4) is located on one side of the cooling air inlet pipe (5) and is welded with a support (10), and the second induced draft fan (6) is fixed on the support (10).