Liquid level adjusting device of desulfurization system
By introducing a level column and level control device into the wet desulfurization system, intuitive display and automatic control of the level are achieved, solving the problems of sensor corrosion and error, and improving the accuracy of level monitoring and the reliability of the system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-03-17
AI Technical Summary
In existing wet desulfurization systems, liquid level monitoring relies on electronic sensors that are susceptible to corrosion and electromagnetic interference, resulting in poor measurement accuracy. Operators cannot intuitively obtain liquid level information, which increases the difficulty of operation and maintenance and reduces the reliability and operability of the system.
The system combines a liquid level column with a liquid level control device. The liquid level column displays the liquid level directly through a transparent window. It is combined with an electronic regulating valve and a liquid level sensor to achieve automatic control, avoid sensor failure and error, and provide reliable liquid level monitoring.
It improves the intuitiveness and accuracy of liquid level monitoring, reduces the difficulty of operation and maintenance, ensures precise control of the liquid level in the desulfurization tower, and enhances the reliability and stability of the system.
Smart Images
Figure CN223995786U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of desulfurization technology, specifically to a liquid level adjustment device for a desulfurization system. Background Technology
[0002] With increasingly stringent environmental protection requirements, wet desulfurization systems have been widely used in many industrial sectors, especially in thermal power generation, steel smelting, and chemical industries. Wet desulfurization systems primarily achieve desulfurization and purification of flue gas by allowing alkaline slurry within the desulfurization tower to fully contact and chemically react with acidic gases such as sulfur dioxide in the flue gas, thereby reducing the emission of harmful gases.
[0003] In the operation of wet desulfurization systems, liquid level control within the desulfurization tower is crucial. It directly affects not only the efficiency and stability of the desulfurization reaction but also the safe and reliable operation of the entire system. However, in existing desulfurization systems, liquid level monitoring in the desulfurization towers mostly relies on electronic level sensors, such as differential pressure and ultrasonic sensors. But in actual operation, these sensors are susceptible to corrosion from sprayed slurry or acidic gases, as well as electromagnetic interference, which reduces the accuracy of liquid level measurements.
[0004] In addition to the aforementioned issues with measurement accuracy, a more critical problem is that operators cannot directly observe the liquid level inside the desulfurization tower. When electronic sensors malfunction or, in certain special circumstances, it is necessary to quickly confirm the liquid level, operators cannot obtain accurate information intuitively and must rely on complex instrument testing and troubleshooting procedures. This undoubtedly increases the difficulty of operation and maintenance, and reduces the reliability and operability of the system. Utility Model Content
[0005] This invention proposes a novel liquid level adjustment device for desulfurization systems that overcomes the shortcomings of existing liquid level monitoring methods, thereby improving the accuracy, reliability, and intuitiveness of liquid level control in wet desulfurization systems.
[0006] The technical solution of this utility model is as follows:
[0007] A desulfurization system level adjustment device includes a desulfurization tower, which has an internal space for containing slurry. The desulfurization tower has an air inlet on its side wall and an air outlet at its top. The desulfurization tower has a spray structure inside for drawing slurry from the tower and spraying it downwards from the top. A level column is provided on the outer wall of the desulfurization tower, with its bottom at the same plane as the bottom of the tower and its side communicating with the interior of the tower. The level column has a transparent window for observing the slurry height inside. The desulfurization tower has a replenishment pipe for supplying new slurry into the tower, and a slurry discharge pipe at its bottom. The desulfurization tower also has a level control device for controlling the opening and closing of the replenishment and discharge pipes based on the level column and the height of the slurry inside.
[0008] Furthermore, the output end of the replenishment pipe is connected to the spray structure, and the replenishment pipe replenishes the new slurry into the desulfurization tower through the spray structure to ensure that the new slurry is evenly distributed.
[0009] Furthermore, the liquid level control device includes an electronic regulating valve and a liquid level sensor. Both the replenishment pipe and the discharge pipe are equipped with electronic regulating valves. The liquid level sensor is embedded in the liquid level column from the top, and the probe of the liquid level sensor faces the bottom of the liquid level column.
[0010] Furthermore, the spray structure includes a water pump, a water pipe, and several spray layers. The water pipe is fixedly connected to the outer wall of the desulfurization tower, and the inlet of the water pipe is connected to the outlet of the water pump. Each spray layer is located inside the desulfurization tower and is arranged linearly along the desulfurization tower. The spray layer is connected to the liquid replenishment pipe and the water pipe. The spray layer is provided with several nozzles. The inlet of the water pump is connected to the slurry inside the desulfurization tower.
[0011] Furthermore, a one-way valve is provided between the water pump and the spray layer. The flow direction of the slurry in the one-way valve is from the water pump to the spray layer. The one-way valve is used to prevent new slurry from flowing into the desulfurization tower through the water pump when the replenishment pipeline replenishes the desulfurization tower through the spray layer.
[0012] Furthermore, a filter screen is provided at the water inlet of the liquid level column and the desulfurization tower. The filter screen is detachably connected to the desulfurization tower to prevent solid particles generated during the desulfurization process from entering the liquid level column.
[0013] Furthermore, the liquid level column is made of fiberglass material.
[0014] Furthermore, reinforcing ribs are fixedly connected to both sides inside the liquid level column to enhance its pressure resistance and prevent deformation.
[0015] Furthermore, the electronic regulating valve is an electronic butterfly valve.
[0016] Furthermore, both the spray layer and the nozzle are made of silicon carbide material.
[0017] The working principle and beneficial effects of this utility model are as follows:
[0018] This invention solves the problem of accurate liquid level monitoring by combining a liquid level column with a liquid level control device. The liquid level column, a simple and intuitive liquid level display structure based on the principle of communicating vessels, can stably and accurately reflect the liquid level height within the desulfurization tower. The transparent window of the column allows operators to directly observe the liquid level within the tower. Whether during routine inspections during normal operation or in special circumstances such as electronic sensor malfunctions, operators can quickly and intuitively obtain liquid level information without relying on complex instrument readings and data analysis, greatly improving the intuitiveness and convenience of liquid level monitoring and effectively reducing the difficulty of operation and maintenance. The liquid level control device controls the system based on the liquid level information from the column, avoiding inaccurate liquid level measurements caused by electronic sensor malfunctions or errors, thus providing a reliable basis for precise control of the desulfurization tower liquid level. Attached Figure Description
[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0020] Figure 1 This is a schematic diagram of the structure of this utility model;
[0021] Figure 2 This is a front view of the present invention;
[0022] Figure 3 for Figure 2 Sectional view at point AA;
[0023] Figure 4 for Figure 2 Sectional view at BB;
[0024] Figure 5 for Figure 2 Enlarged view of point A;
[0025] Figure 6 for Figure 3 Enlarged view of point B;
[0026] Figure 7 for Figure 3 Enlarged view of point C.
[0027] In the diagram: 1. Desulfurization tower; 2. Liquid level column; 3. Liquid replenishment pipe; 4. Slurry discharge pipe; 11. Air inlet; 12. Air outlet; 21. Transparent window; 22. Ventilation hole; 23. Filter screen; 24. Reinforcing rib; 51. Liquid level sensor; 52. Electronic regulating valve; 61. Water pump; 62. Water pipe; 63. Spray layer; 64. Nozzle; 65. Check valve. Detailed Implementation
[0028] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.
[0029] like Figures 1-6 As shown in the figure, this embodiment proposes a desulfurization system liquid level adjustment device, including a desulfurization tower 1. The desulfurization tower 1 is provided with an internal space for containing slurry. An air inlet 11 is provided on the side wall of the desulfurization tower 1, and an air outlet 12 is provided on the top of the desulfurization tower 1. A spray structure is provided inside the desulfurization tower 1 for extracting the slurry inside the desulfurization tower 1 and spraying the slurry from the top of the desulfurization tower 1 to the bottom. A liquid level column 2 is provided on the outer wall of the desulfurization tower 1. The bottom of the liquid level column 2 is on the same plane as the bottom of the desulfurization tower 1 and its side is connected to the interior of the desulfurization tower 1. A transparent window 21 is provided on the liquid level column 2 for observing the height of the slurry inside the liquid level column 2. A replenishment pipe 3 is provided on the desulfurization tower 1 for conveying new slurry into the desulfurization tower 1. The output end of the replenishment pipe 3 is connected to the spray structure. A slurry discharge pipe 4 is provided at the bottom of the desulfurization tower 1. The desulfurization tower 1 is also provided with a liquid level control device for controlling the opening and closing of the replenishment pipe 3 and the slurry discharge pipe 4 according to the height of the liquid level column 2 and the slurry inside the desulfurization tower 1.
[0030] Desulfurization tower 1, as the core reaction vessel of wet desulfurization, provides a site for the contact reaction between flue gas and desulfurization slurry. Flue gas enters desulfurization tower 1 through the inlet pipe, where it mixes and contacts thoroughly with the sprayed slurry. Acidic gases are absorbed by the slurry, and the purified flue gas is discharged from the top outlet 12. The spray structure draws slurry from desulfurization tower 1 and sprays it downwards, forming numerous fine droplets to increase the contact area between the slurry and flue gas. Furthermore, when the replenishment pipe 3 delivers new slurry, it evenly sprays the new slurry into desulfurization tower 1, serving the dual purpose of replenishing slurry and promoting the desulfurization reaction. The level column 2 is connected to the interior of desulfurization tower 1 using the principle of communicating vessels, and its transparent window 21 visually displays the slurry level within the tower. This provides operators with a direct way to observe the level, eliminating the need for complex electronic detection equipment. During equipment inspections, troubleshooting, or emergencies, it allows for quick and accurate acquisition of level information, enhancing the intuitiveness and reliability of level monitoring. A vent 22 should also be provided at the top of the liquid level column 2 to allow gas to be discharged in a timely manner, thus enabling the slurry to enter smoothly. The replenishment pipe 3 transports new desulfurization slurry from an external source to the desulfurization tower 1, specifically connected to the spray structure, so that the new slurry can be evenly distributed within the tower using the spray structure. This ensures a timely and stable supply of slurry when the slurry level in the desulfurization tower 1 drops or when fresh slurry needs to be replenished to maintain desulfurization reaction efficiency, guaranteeing the continuity of the desulfurization process. By connecting the replenishment pipe 3 to the spray structure, new slurry can be evenly sprayed into the desulfurization tower 1 during replenishment. This method not only increases the liquid level but also allows the new slurry to participate in the desulfurization reaction the moment it enters the tower, fully utilizing the advantages of the spray structure. This tightly integrates liquid level adjustment with the desulfurization process, improves the uniformity of slurry distribution within the tower, thereby enhancing the synergy between liquid level adjustment and desulfurization efficiency, and optimizing the desulfurization effect. The inlet of the replenishment pipe 3 should be connected to the external slurry, and new slurry enters the desulfurization tower 1 through the replenishment pipe 3. The discharge pipe 4 is used to discharge the slurry at the bottom of the desulfurization tower 1, which can discharge slurry containing reaction products (such as solid particles such as gypsum) and any excess slurry in the tower, so as to facilitate subsequent processing or maintain the balance of slurry volume in the tower. The liquid level control device controls the opening and closing of the replenishment pipe 3 and the discharge pipe 4 based on the slurry height information in the liquid level column 2, so as to realize the automatic control and adjustment of the slurry level in the desulfurization tower 1 and maintain it within the set appropriate liquid level range.
[0031] In this embodiment, the liquid level control device includes an electronic regulating valve 52 and a liquid level sensor 51. Both the replenishment pipe 3 and the discharge pipe 4 are equipped with electronic regulating valves 52. The electronic regulating valves 52 are electronic butterfly valves. The liquid level sensor 51 is embedded in the liquid level column 2 from the top of the liquid level column 2, and the probe of the liquid level sensor 51 faces the bottom of the liquid level column 2.
[0032] The electronic regulating valve 52 of the replenishment pipeline 3 is used to precisely control the opening and closing of the replenishment pipeline 3, thereby regulating the flow rate of slurry replenished from the outside into the desulfurization tower 1. When the liquid level sensor 51 detects that the liquid level in the desulfurization tower 1 is lower than the set lower limit, the electronic regulating valve 52 on the replenishment pipeline 3 opens and adjusts its opening, allowing new slurry to enter the desulfurization tower 1 at the set flow rate to raise the liquid level. The electronic regulating valve 52 is an electronic butterfly valve. The electronic butterfly valve adopts a centerline structure without eccentricity design, which has the characteristic of significantly low operating torque. When equipped with an electric actuator, it is significantly economical, labor-saving, and lightweight, reducing the requirements for the drive device. A smaller power motor can be selected, thereby saving energy and reducing operating costs. The electronic regulating valve 52 of the discharge pipeline 4 is used to regulate the discharge flow rate of the discharge pipeline 4 according to the instructions of the liquid level control device. When the liquid level is higher than the set upper limit, the electronic regulating valve 52 opens to a suitable degree under the action of the control system, discharging the slurry at the bottom of the desulfurization tower 1 and lowering the liquid level. A level sensor 51 is embedded from the top of the level column 2 with its probe facing the bottom of the level column 2, monitoring the height of the slurry in the level column 2 in real time. The level in the desulfurization tower 1 is indirectly reflected by measuring the liquid level height in the level column 2. Since the level in the level column 2 and the desulfurization tower 1 are at the same level based on the principle of communicating vessels, the level sensor 51 enables non-contact measurement of the liquid level in the desulfurization tower 1. This avoids direct contact between the sensor and the corrosive slurry and complex operating environment inside the desulfurization tower 1, reducing the risk of sensor corrosion, clogging, and other malfunctions, and improving the reliability and stability of the level measurement. An ultrasonic level sensor 51 can be used.
[0033] In this embodiment, the spray structure includes a water pump 61, a multi-layer spray layer 63, and a water pipe 62. The water pipe 62 is fixedly connected to the outer wall of the desulfurization tower 1. The inlet of the water pipe 62 is connected to the outlet of the water pump 61. The multi-layer spray layer 63 is located inside the desulfurization tower 1 and is arranged linearly along the desulfurization tower 1. The spray layer 63 is connected to the liquid replenishment pipe 3 and the water pipe 62. The spray layer 63 is provided with a number of nozzles 64. The angle of the nozzles 64 is adjustable. The inlet of the water pump 61 is connected to the slurry inside the desulfurization tower 1. The spray layer 63 and the nozzles 64 are both made of silicon carbide material.
[0034] A water pump 61 provides power to the spray structure, drawing the slurry from the desulfurization tower 1 and transporting it to the water pipe 62 to ensure that the slurry can reach the spray layer 63 located at the top of the desulfurization tower 1 for spraying. Multiple spray layers 63 are linearly arranged at different heights within the desulfurization tower 1. Each spray layer 63 is equipped with multiple nozzles 64 to atomize and spray the slurry transported from the water pipe 62. The different heights of the spray layers 63 allow the slurry to form a multi-layered spray coverage within the desulfurization tower 1, increasing the contact opportunities and contact area between the slurry and the flue gas, resulting in a more complete desulfurization reaction. The water pipe 62 serves as the transport channel for the slurry from the water pump 61 to the spray layers 63, stably distributing the drawn slurry to each spray layer 63. It is fixedly connected to the outer wall of the desulfurization tower 1, ensuring structural stability, while its reasonable layout and pipe diameter design meet the slurry's flow rate and pressure requirements. An adjustable-angle nozzle 64 sprays the slurry entering from the spray layer 63 at different angles. Adjusting the angle of the nozzle 64 changes the spray range and direction of the slurry. The nozzle 64 can be a universal nozzle to achieve the adjustable angle function. The spray layer 63 and nozzle 64, made of silicon carbide, possess characteristics such as high temperature resistance, oxidation resistance, high strength, resistance to extreme cold and heat, good thermal shock resistance, wear resistance, and corrosion resistance. They can operate stably for extended periods under harsh desulfurization conditions and have a long service life. The nozzle 64 produces a regular spray pattern with uniform droplet size and good atomization, effectively improving desulfurization efficiency and preventing clogging.
[0035] In this embodiment, a one-way valve 65 is installed between the water pump 61 and the spray layer 63. The flow direction of the slurry in the one-way valve 65 is from the water pump 61 to the spray layer 63. The one-way valve 65 is used to prevent new slurry from flowing into the desulfurization tower 1 through the water pump 61 when the replenishment pipe 3 replenishes the desulfurization tower 1 through the spray layer 63. When the replenishment pipe 3 replenishes new slurry into the desulfurization tower 1 through the spray layer 63, the one-way valve 65 prevents the new slurry from flowing back to the water pump 61, thereby preventing the new slurry from flowing directly into the original slurry inside the desulfurization tower 1 through the water pump 61.
[0036] In this embodiment, a filter screen 23 is installed at the water inlet between the liquid level column 2 and the desulfurization tower 1. The filter screen 23 is detachably connected to the desulfurization tower 1 and is used to prevent solid particles generated during the desulfurization process from entering the liquid level column 2. The filter screen 23, installed at the water inlet between the liquid level column 2 and the desulfurization tower 1, acts as a barrier, effectively intercepting solid particles generated during the desulfurization process and suspended in the slurry, preventing them from entering the liquid level column 2. Since the liquid level column 2 is mainly used to visually display the liquid level height, solid particles entering may adhere to the wall of the liquid level column 2, block the bottom connection of the liquid level column 2, or interfere with the normal operation of the liquid level sensor 51. Furthermore, the detachable connection between the filter screen 23 and the desulfurization tower 1 facilitates regular cleaning and replacement of the filter screen 23, reducing maintenance difficulty and cost, and ensuring the long-term stable operation of the entire liquid level monitoring system. The connection between the filter screen 23 and the desulfurization tower 1 can be fixed by bolts or by clips embedded into the desulfurization tower 1.
[0037] In this embodiment, the liquid level column 2 is made of fiberglass reinforced plastic (FRP). Reinforcing ribs 24 are fixedly connected to both sides of the liquid level column 2 to enhance its compressive strength and prevent deformation. FRP has excellent corrosion resistance, capable of withstanding the corrosive slurry environment inside the desulfurization tower 1 and the potential erosion by acid and alkaline gases, effectively protecting the structure of the liquid level column 2 from corrosion damage. The reinforcing ribs 24 fixedly connected to both sides of the liquid level column 2 further enhance its overall strength and compressive strength, preventing deformation or breakage when subjected to slurry pressure inside the desulfurization tower 1, external environmental pressure, and possible impact loads.
[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A desulfurization system level adjustment device, comprising a desulfurization tower (1), wherein the desulfurization tower (1) has an internal space for containing slurry, an air inlet (11) is provided on the side wall of the desulfurization tower (1), and an air outlet (12) is provided on the top of the desulfurization tower (1), characterized in that, The desulfurization tower (1) is equipped with a spray structure for extracting slurry from the desulfurization tower (1) and spraying slurry from the top of the desulfurization tower (1) to the bottom. The outer wall of the desulfurization tower (1) is equipped with a liquid level column (2). The bottom of the liquid level column (2) is on the same plane as the bottom of the desulfurization tower (1) and its side is connected to the inside of the desulfurization tower (1). The liquid level column (2) is equipped with a transparent window (21) for observing the height of the slurry inside the liquid level column (2). The desulfurization tower (1) is equipped with a replenishment pipe (3) for conveying new slurry into the desulfurization tower (1). The bottom of the desulfurization tower (1) is equipped with a slurry discharge pipe (4). The desulfurization tower (1) is also equipped with a liquid level control device for controlling the opening and closing of the replenishment pipe (3) and the slurry discharge pipe (4) according to the height of the liquid level column (2) and the slurry inside.
2. The desulfurization system liquid level adjustment device according to claim 1, characterized in that, The output end of the replenishment pipe (3) is connected to the spray structure. The replenishment pipe (3) replenishes the new slurry into the desulfurization tower (1) through the spray structure so that the new slurry is evenly distributed.
3. The desulfurization system liquid level adjustment device according to claim 1, characterized in that, The liquid level control device includes an electronic regulating valve (52) and a liquid level sensor (51). The replenishment pipe (3) and the discharge pipe (4) are both equipped with electronic regulating valves (52). The liquid level sensor (51) is embedded in the liquid level column (2) from the top of the liquid level column (2), and the probe of the liquid level sensor (51) faces the bottom of the liquid level column (2).
4. The desulfurization system liquid level adjustment device according to claim 1, characterized in that, The spray structure includes a water pump (61), a water pipe (62), and several spray layers (63). The water pipe (62) is fixedly connected to the outer wall of the desulfurization tower (1). The inlet of the water pipe (62) is connected to the outlet of the water pump (61). Each spray layer (63) is located inside the desulfurization tower (1) and is arranged linearly along the desulfurization tower (1). The spray layer (63) is connected to the liquid replenishment pipe (3) and the water pipe (62). The spray layer (63) is provided with several nozzles (64). The inlet of the water pump (61) is connected to the slurry inside the desulfurization tower (1).
5. The desulfurization system liquid level adjustment device according to claim 4, characterized in that, A one-way valve (65) is provided between the water pump (61) and the spray layer (63). The flow direction of the slurry in the one-way valve (65) is from the water pump (61) to the spray layer (63). The one-way valve (65) is used to prevent new slurry from flowing into the desulfurization tower (1) through the water pump (61) when the replenishment pipe (3) replenishes the desulfurization tower (1) through the spray layer (63).
6. The desulfurization system liquid level adjustment device according to claim 1, characterized in that, The liquid level column (2) and the water passage inside the desulfurization tower (1) are equipped with a filter screen (23). The filter screen (23) is detachably connected to the desulfurization tower (1) to prevent solid particles generated during the desulfurization process from entering the liquid level column (2).
7. The desulfurization system liquid level adjustment device according to claim 1, characterized in that, The liquid level column (2) is made of fiberglass.
8. The desulfurization system liquid level adjustment device according to claim 1, characterized in that, The liquid level column (2) has reinforcing ribs (24) fixedly connected to both sides inside to enhance its pressure resistance and prevent deformation.
9. A desulfurization system liquid level adjustment device according to claim 3, characterized in that, The electronic regulating valve (52) is an electronic butterfly valve.
10. A desulfurization system liquid level adjustment device according to claim 4, characterized in that, Both the spray layer (63) and the nozzle (64) are made of silicon carbide material.