Device for eliminating white smoke mist of desulfurized tail gas
By using a drying box and silica gel desiccant in the desulfurization tail gas treatment device, combined with an automatic flipping and negative pressure suction mechanism, the problem of high energy consumption in high-temperature heating to eliminate white fog has been solved, achieving low-cost, high-efficiency white fog elimination and desiccant regeneration.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUNXI JIUFENG VANADIUM INVESTMENT CO LTD
- Filing Date
- 2025-04-02
- Publication Date
- 2026-04-17
AI Technical Summary
Existing technologies that eliminate white fog by heating desulfurization tail gas to high temperatures are energy-intensive, increase operating costs, and require additional heat sources.
The drying chamber is filled with silica gel desiccant, and the silica gel desiccant is automatically flipped and recycled through a lifting mechanism on the drying plate. The microporous structure of the desiccant adsorbs moisture and reduces the humidity of the flue gas, while a negative pressure suction mechanism ensures a continuous supply of desiccant.
It effectively reduced flue gas humidity, eliminated white fog, reduced energy consumption, enabled the reuse of desiccant, and reduced operating costs.
Smart Images
Figure CN224126936U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flue gas treatment technology, specifically to a device for eliminating white mist in desulfurization tail gas. Background Technology
[0002] The white mist in desulfurization exhaust gas is mainly caused by water vapor in the flue gas condensing into small water droplets when it encounters cold air during emission. This not only affects the visual appearance but may also indicate the presence of incompletely treated pollutants.
[0003] To effectively eliminate this phenomenon, existing technologies use heating equipment (such as gas heaters, electric heaters, or steam heat exchangers) to heat the low-temperature, high-humidity flue gas after wet desulfurization to a sufficiently high temperature, typically above 80°C, so that the water vapor in the flue gas is no longer saturated, thus preventing it from cooling and condensing into small water droplets during emission. However, this method has high energy consumption, increasing operating costs, and requires an additional heat source. Therefore, we propose a device for eliminating white mist in desulfurization tail gas. Utility Model Content
[0004] The purpose of this invention is to provide a device for eliminating white smoke in desulfurization tail gas. It has the advantages of using a desiccant to reduce the moisture in the flue gas to eliminate white smoke, and recycling and reusing the desiccant to reduce energy consumption and cost. It solves the problems of high energy consumption and increased operating costs caused by heating the flue gas to a high temperature to eliminate white smoke, and the need for an additional heat source.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a device for eliminating white mist in desulfurization tail gas, comprising a drying chamber, an inlet pipe and an outlet pipe connected to the drying chamber, a drying plate with ventilation holes disposed inside the drying chamber between the inlet pipe and the outlet pipe, the drying plate being filled with silica gel desiccant; a desiccant inlet pipe provided on the drying chamber for replenishing silica gel desiccant; and a desiccant outlet provided at the bottom of the drying chamber for convenient discharge of used desiccant.
[0006] One end of the drying plate is connected to the inner wall of the drying chamber via a hinge, and a lifting mechanism is provided on the drying plate. The lifting mechanism is used to drive the drying plate to flip up and down along the hinge, thereby pouring the silica gel desiccant on the drying plate into the desiccant outlet.
[0007] Preferably, the lifting mechanism includes a telescopic rod, one end of which is rotatably connected to the inner wall of the drying chamber via a first rotating shaft, and the other end is rotatably connected to the drying plate via a second rotating shaft, providing power support for the rotation of the drying plate.
[0008] Preferably, a support plate is fixedly connected to the drying plate, and a weighing element is provided between the support plate and the drying plate. The second rotating shaft is provided on the support plate. The weighing element is used to weigh the weight change of the silica gel desiccant on the drying plate so as to understand the usage of the desiccant in a timely manner.
[0009] Preferably, the drying plate consists of two plates, which divide the interior of the drying chamber into upper and lower areas, and both plates are equipped with a lifting mechanism. The drying plate is configured as two plates, and both plates can be flipped simultaneously to facilitate the silica gel desiccant falling through the gap between the two plates to the desiccant outlet.
[0010] Preferably, the drying plates are arranged in several layers from top to bottom, dividing the interior of the drying chamber into multiple areas from top to bottom, further enhancing the drying capacity of the flue gas. Each drying plate is equipped with a lifting mechanism, which allows all drying plates to be opened simultaneously, thereby discharging the used silica gel desiccant from the desiccant outlet.
[0011] Preferably, a support is fixedly connected to the bottom of the drying box, and a recycling box is provided at the bottom of the drying box corresponding to the desiccant outlet, which is specifically used to collect the used silica gel desiccant poured from the drying plate.
[0012] Preferably, in the desiccant supply stage, solenoid valves are installed on both the desiccant inlet pipe and the desiccant outlet to precisely control the inflow and outflow of the desiccant. The desiccant inlet pipe is connected to a silo, which provides a storage and supply space for the desiccant.
[0013] Preferably, the hopper is equipped with a negative pressure suction mechanism, which includes an air extraction pipe, a vacuum negative pressure pump, and a negative pressure suction pipe. The hopper is connected to the vacuum negative pressure pump via the air extraction pipe, and the negative pressure suction pipe of the hopper is inserted into a spare box. The negative pressure suction mechanism is used to suck the silica gel desiccant in the spare box into the hopper. The negative pressure suction mechanism can suck the silica gel desiccant in the spare box into the hopper, ensuring a continuous supply of desiccant.
[0014] Preferably, both the recycling bin and the spare bin are used to collect silica gel desiccant, and both bins are equipped with casters at the bottom for easy movement and operation, thus improving the convenience and practicality of the device.
[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0016] 1. This invention incorporates a drying chamber filled with silica gel desiccant. Silica gel desiccant possesses a highly developed microporous structure, providing a large specific surface area that enables efficient moisture adsorption. In desulfurization tail gas treatment scenarios, it rapidly and extensively absorbs water vapor from flue gas, effectively reducing flue gas humidity and thus helping to eliminate white smoke. Silica gel desiccant also exhibits good thermal stability; after drying to remove adsorbed moisture, it can regain its moisture-absorbing capacity and be reused. In this device, the used silica gel desiccant is recycled and regenerated for reuse, significantly reducing operating costs. High-quality silica gel desiccant can be reused multiple times while maintaining good moisture-absorbing performance. This solves the problem of high energy consumption and increased operating costs associated with heating flue gas to high temperatures to eliminate white smoke, which requires an additional heat source.
[0017] 2. This utility model utilizes a telescopic rod to control the rotation of the drying plate, enabling automatic discharge and replenishment of used silica gel desiccant. This avoids the complex operation of frequent replacements required by existing drying devices, which wastes manpower, affects the efficiency of flue gas treatment, and prevents the treatment of white mist in the flue gas if the desiccant is not replaced in time. Since the silica gel desiccant becomes heavier after absorbing water, a weighing element, i.e., a weighing sensor, monitors its change. When a certain value is reached, the telescopic rod retracts, automatically discharging the used silica gel desiccant into the recycling bin. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the drying oven structure of this utility model;
[0020] Figure 3 This is a schematic diagram of the drying plate structure of this utility model.
[0021] In the diagram: 1. Drying chamber; 2. Inlet pipe; 3. Outlet pipe; 4. Drying plate; 5. Desiccant inlet pipe; 6. Desiccant outlet; 7. Telescopic rod; 8. Hinge; 9. Shaft 1; 10. Weighing element; 11. Support plate; 12. Shaft 2; 13. Vent hole; 14. Bracket; 15. Recovery box; 16. Casters; 17. Spare box; 18. Hopper; 19. Extraction pipe; 20. Vacuum negative pressure pump; 21. Negative pressure suction pipe. Detailed Implementation
[0022] 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.
[0023] like Figure 1 As shown, a device for eliminating white mist in desulfurization tail gas includes a drying chamber 1. The drying chamber 1 introduces humid flue gas through an inlet pipe 2 and discharges the treated gas through an outlet pipe 3. Inside the drying chamber 1, a drying plate 4 with ventilation holes 13 is installed between the inlet pipe 2 and the outlet pipe 3. This plate is filled with silica gel desiccant to absorb moisture from the flue gas. Silica gel desiccant is reusable and chemically stable, not reacting with common acids or alkalis, nor with other components in the desulfurization tail gas. This ensures that its properties remain unchanged when treating desulfurization tail gas containing various complex components, allowing it to continuously and stably perform its drying function. Furthermore, it does not corrode the equipment, ensuring the service life of the drying chamber 1 and related devices.
[0024] To facilitate the replacement and recycling of the desiccant, a desiccant inlet pipe 5 is provided at the top of the drying chamber 1, and a desiccant outlet 6 is provided at the bottom. One end of the drying plate 4 is connected to the inner wall of the drying chamber 1 via a hinge 8, and the other end is equipped with a lifting mechanism, specifically a telescopic rod 7, which can be flipped up and down via the hinge 8, thereby pouring the silica gel desiccant on the drying plate 4 into the desiccant outlet 6.
[0025] In addition, a support plate 11 is fixedly connected to the drying plate 4, and a weighing element 10 is installed between the support plate 11 and the drying plate 4 to monitor the weight change of the silica gel desiccant in real time, determine its moisture absorption saturation, and monitor the amount of silica gel desiccant added when unused silica gel desiccant is added.
[0026] like Figure 2 and 3 As shown, the drying plate 4 consists of two layered plates, which divide the interior of the drying chamber 1 into upper and lower areas. Each plate is equipped with an independent lifting mechanism to improve operational flexibility. The drying plate 4 is configured as two plates, which can be flipped simultaneously to facilitate the silica gel desiccant falling from the gap between the two plates to the desiccant outlet 6.
[0027] The desiccant inlet pipe 5 is connected to the hopper 18, and the flow rate between them is controlled by a solenoid valve. The hopper 18 is also equipped with a negative pressure suction mechanism, which includes an air extraction pipe 19, a vacuum negative pressure pump 20, and a negative pressure suction pipe 21. The hopper 18 is connected to the vacuum negative pressure pump 20 through the air extraction pipe 19, and the negative pressure suction pipe 21 of the hopper 18 is inserted into the spare box 17, which can suck the silica gel desiccant in the spare box 17 into the hopper 18 to ensure an adequate supply of desiccant.
[0028] The negative pressure suction mechanism operates based on Pascal's principle and Bernoulli's principle. The vacuum negative pressure pump 20, through its operation, extracts air from the hopper 18, rapidly reducing the air pressure and creating a negative pressure environment. Under atmospheric pressure, the silica gel desiccant in the standby tank 17, which is at normal pressure, is "pressed" into the hopper 18 through the negative pressure suction pipe 21, driven by the pressure difference.
[0029] Specifically, when the vacuum negative pressure pump 20 starts, air is continuously extracted from the hopper 18. According to Pascal's principle, the pressure is evenly distributed throughout the entire hopper 18. Meanwhile, the spare tank 17 is at atmospheric pressure. According to Bernoulli's principle, fluids (here, air can be considered a fluid) always flow from high-pressure areas to low-pressure areas. Therefore, under this pressure difference, the air surrounding the silica gel desiccant carries the desiccant along with it into the hopper 18 through the negative pressure suction pipe 21, completing the suction process.
[0030] like Figure 1 As shown, the drying chamber 1 can also be equipped with multiple layers of drying plates 4, dividing the chamber into multiple areas for step-by-step drying of the flue gas. A support 14 is fixed to the bottom of the drying chamber 1, and a recycling box 15 is installed at the corresponding desiccant outlet 6 to collect waste silica gel desiccant. After the recycled silica gel desiccant is dried to remove adsorbed moisture, it can regain its moisture absorption capacity and be reused.
[0031] Both the recycling bin 15 and the spare bin 17 are equipped with casters 16 at the bottom. The design of both recycling bin 15 and spare bin 17 with casters 16 facilitates movement and maintenance, further enhancing the practicality and convenience of the device.
[0032] like Figure 2 As shown, when three drying plates 4 are installed, the bottom two drying plates 4 are closed by the telescopic rod 7, while the middle and top drying plates 4 are in a closed state. Figure 2The middle layer is in the open state. The solenoid valve of the desiccant inlet pipe 5 is opened to add silica gel desiccant to the bottom drying plate 4. When the weighing element 10 on the bottom drying plate 4 detects that the weight has reached the set value, that is, when the silica gel desiccant dosage of that layer has reached the set value, the middle drying plate 4 closes. After the middle layer is full, the top layer closes, thus achieving automatic quantitative addition of silica gel desiccant layer by layer. After the top layer is full, the addition is complete, and the solenoid valve of the desiccant inlet pipe 5 is in the closed state.
[0033] When the weighing elements 10 of all three layers of drying plate 4 detect that the silica gel desiccant has become heavier and reached the weight of the desiccant saturation state, the three layers of drying plate 4 are simultaneously in a state of... Figure 3 When the desiccant outlet 6 is in the open state, the solenoid valve is opened, and the silica gel desiccant is discharged into the recycling box 15. After the silica gel desiccant is dried and reused in the recycling box 15, the silica gel desiccant in the spare box 17 is sucked into the hopper 18 by the negative pressure suction mechanism. The recycling box 15 and the spare box 17 are used alternately, one of which collects the used silica gel desiccant, and the other provides the dried and recycled silica gel desiccant.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A device for eliminating white mist in desulfurization tail gas, comprising a drying chamber (1), characterized in that: The drying chamber (1) is connected to an air inlet pipe (2) and an air outlet pipe (3). Inside the drying chamber (1), between the air inlet pipe (2) and the air outlet pipe (3), there is a drying plate (4) with ventilation holes (13). The drying plate (4) is filled with silica gel desiccant. The drying chamber (1) is provided with a desiccant feed pipe (5), and the bottom of the drying chamber (1) is provided with a desiccant outlet (6). One end of the drying plate (4) is connected to the inner wall of the drying box (1) via a hinge (8), and a lifting mechanism is provided on the drying plate (4). The lifting mechanism is used to drive the drying plate (4) to rotate up and down along the hinge (8), thereby pouring the silica gel desiccant on the drying plate (4) into the desiccant outlet (6).
2. A device for eliminating white smoke in flue gas of desulfurized tail gas according to claim 1, characterized in that: The lifting mechanism includes a telescopic rod (7), one end of which is rotatably connected to the inner wall of the drying box (1) via a rotating shaft (9), and the other end is rotatably connected to the drying plate (4) via a rotating shaft (12).
3. A device for eliminating white smoke in flue gas of desulfurized tail gas according to claim 2, characterized in that: A support plate (11) is fixedly connected to the drying plate (4). A weighing element (10) is provided between the support plate (11) and the drying plate (4). The rotating shaft (12) is provided on the support plate (11). The weighing element (10) is used to weigh the weight change of the silica gel desiccant on the drying plate (4).
4. The device for eliminating white smoke in flue gas according to claim 3, characterized in that: The drying plate (4) consists of two plates, which are used to divide the interior of the drying box (1) into upper and lower areas, and both plates are equipped with lifting mechanisms.
5. The device for eliminating white smoke in flue gas according to claim 1, characterized in that: The drying plate (4) is arranged in several layers from top to bottom. The several layers of drying plate (4) are used to divide the interior of the drying box (1) into multiple areas from top to bottom, and each layer of drying plate (4) is equipped with a lifting mechanism.
6. The device for eliminating white smoke in flue gas according to claim 1, characterized in that: A bracket (14) is fixedly connected to the bottom of the drying box (1), and a recycling box (15) is provided at the bottom of the drying box (1) corresponding to the desiccant outlet (6).
7. The device for eliminating white mist in desulfurization tail gas according to claim 6, characterized in that: Solenoid valves are provided on both the desiccant inlet pipe (5) and the desiccant outlet (6), and the desiccant inlet pipe (5) is connected to the silo (18).
8. The device for eliminating white smoke in flue gas according to claim 7, characterized in that: The hopper (18) is equipped with a negative pressure suction mechanism, which includes an air extraction pipe (19), a vacuum negative pressure pump (20), and a negative pressure suction pipe (21). The hopper (18) is connected to the vacuum negative pressure pump (20) through the air extraction pipe (19). The negative pressure suction pipe (21) of the hopper (18) is inserted into the spare box (17). The negative pressure suction mechanism is used to suck the silica gel desiccant in the spare box (17) into the hopper (18).
9. The device for eliminating white smoke in flue gas according to claim 8, characterized in that: Both the recycling bin (15) and the spare bin (17) are used to collect silica gel desiccant, and both the recycling bin (15) and the spare bin (17) are equipped with casters (16) at the bottom.