A flue gas efficient semi-dry desulfurization device
Patent Information
- Application Number
- CN202522255789.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-24
- Publication Date
- 2026-09-15
- Estimated Expiration
- 2035-10-24
AI Technical Summary
当前主流的烟气脱硫工艺中，半干法脱硫在非电工业领域应用广泛，但现有半干法脱硫系统仍存在诸多技术痛点：一方面，传统混合结构难以实现脱硫剂与烟气的高效湍流混合，易出现脱硫剂团聚、局部反应不充分的问题，导致高硫烟气环境下出口SO2浓度难以稳定控制在35mg/Nm³ 以下；另一方面，多数系统缺乏精准的多参数联动监测与调节机制，无法实时匹配烟气工况调整脱硫剂投加量、引风机转速等参数，不仅导致电耗居高不下，还可能因参数失衡引发系统运行不稳定，增加运维成本
1、本实用新型通过装置内设置有脱硫剂料仓和混合组件，通过输入端和输出端将烟气从文丘里管导通，通过进料口将消石灰粉通入文丘里管，使得烟气与消石灰粉形成湍流，能够提高脱硫剂与烟气中SO2的接触面积和反应效率，确保消石灰粉颗粒能充分包裹烟气中的SO2分子，可减少脱硫剂颗粒的团聚现象，避免局部反应不充分导致的脱硫效率波动，为后续脱硫反应器内的深度反应奠定均匀混合基础，达到提升脱硫效果的目的。
Smart Images
Figure CN224748863U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flue gas treatment technology, and in particular to a high-efficiency semi-dry flue gas desulfurization device. Background Technology
[0002] With the rapid development of my country's industrialization, a series of environmental problems caused by SO2 emissions from industry have become increasingly prominent. Problems such as acid rain and photochemical smog caused by excessive SO2 emissions pose a serious threat to the ecosystem and human health, and restrict social development. As a result, the national SO2 emission standards are becoming increasingly stringent, and industrial enterprises are continuously increasing their investment in flue gas desulfurization treatment. Among the current mainstream flue gas desulfurization processes, semi-dry desulfurization is widely used in non-power industrial sectors. However, existing semi-dry desulfurization systems still have many technical challenges: On the one hand, traditional mixing structures struggle to achieve efficient turbulent mixing of the desulfurizing agent and flue gas, easily leading to desulfurizing agent agglomeration and incomplete local reactions. This makes it difficult to stably control the outlet SO2 concentration below 35 mg / Nm³ in high-sulfur flue gas environments. On the other hand, most systems lack precise multi-parameter linkage monitoring and adjustment mechanisms, failing to match flue gas operating conditions in real time to adjust parameters such as desulfurizing agent dosage and induced draft fan speed. This not only results in high power consumption but may also cause system instability due to parameter imbalances, increasing operation and maintenance costs. Utility Model Content
[0003] The purpose of this invention is to provide a high-efficiency semi-dry flue gas desulfurization device to solve the problems mentioned in the background art.
[0004] To achieve the above objectives, this utility model provides the following technical solution: Design a high-efficiency semi-dry flue gas desulfurization device, including a desulfurization reactor, a desulfurizing agent silo, a mixing component, an air inlet pipe, a connecting pipe, a monitoring component, a bag filter, an ash silo, and an induced draft fan. The lower end of the desulfurizing agent silo is connected to a screw feeder, and the mixing component is connected to the lower end of the screw feeder. The front and rear ends of the mixing component are respectively connected to the air inlet pipe and the connecting pipe. The desulfurization reactor is connected to the other end of the connecting pipe, and the other end of the desulfurization reactor is connected to the bag filter through the connecting pipe. The lower end of the bag filter is connected to an ash silo, and the side is connected to an induced draft fan. The mixing component includes a venturi tube, a feed inlet, an input end, and an output end. The feed inlet is located on the side of the venturi tube and communicates with the lower end of the screw feeder. The input end is located at the front end of the venturi tube and is connected to the air inlet pipe. The output end is located at the rear end of the venturi tube and is connected to the connecting pipe. The monitoring component includes an SO2 concentration sensor, a particle concentration sensor, and a pressure sensor. The SO2 concentration sensor, particle concentration sensor, and pressure sensor are respectively installed on the connecting pipe, and the detection end extends into the inside of the connecting pipe.
[0005] Preferably, an ash pump is provided at the top of the ash silo, and the ash pump is connected to the lower end of the bag filter dust collector through a pipeline.
[0006] Preferably, the screw feeder is driven by a variable frequency motor, and the variable frequency motor is electrically connected to the equipment control system.
[0007] Preferably, the induced draft fan is a variable frequency speed control motor, and the variable frequency speed control motor is electrically connected to the equipment control system.
[0008] Preferably, the SO2 concentration sensor, particle concentration sensor, and pressure sensor are connected to the equipment control system via shielded cables.
[0009] Preferably, a circulation pipeline is provided between the bag filter and the desulfurization reactor, and a conveying pump is provided on the circulation pipeline to send part of the material collected by the bag filter back to the desulfurization reactor.
[0010] Preferably, the desulfurizing agent silo is sequentially connected to a digester system and a hydrated lime powder silo. The hydrated lime powder silo is connected to a screw feeder via an inclined chute. The desulfurizing agent in the desulfurizing agent silo is processed by the digester system to generate hydrated lime powder.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model incorporates a desulfurizing agent silo and a mixing component within the device. Flue gas is guided through a venturi tube via the input and output ends, and quicklime powder is introduced into the venturi tube through the feed inlet. This creates turbulence between the flue gas and the quicklime powder, increasing the contact area and reaction efficiency between the desulfurizing agent and SO2 in the flue gas. This ensures that the quicklime powder particles can fully encapsulate SO2 molecules in the flue gas, reducing the agglomeration of desulfurizing agent particles and avoiding fluctuations in desulfurization efficiency caused by incomplete local reactions. This lays a uniform mixing foundation for the subsequent deep reaction in the desulfurization reactor, thereby improving the desulfurization effect.
[0012] 2. This utility model incorporates monitoring components within the device. An SO2 concentration sensor monitors the SO2 concentration at the desulfurization reactor input, a particulate matter concentration sensor monitors the particulate matter concentration, and a pressure sensor monitors the gas pressure within the equipment's pipelines. This enables real-time and precise monitoring of key operating parameters of the desulfurization system. The system can flexibly adjust its operation based on the flue gas SO2 concentration, ensuring stable outlet SO2 content in high-sulfur flue gas environments. Simultaneously, it saves electricity and reduces desulfurization operating costs, ultimately ensuring the system remains in a highly efficient and stable desulfurization operating state, avoiding waste of desulfurizing agents or excessive emissions.
[0013] Specific embodiments of the present invention are disclosed in detail with reference to the following description and accompanying drawings, indicating how the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications, and equivalents. Attached Figure Description
[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure according to the present utility model; Figure 2 This is a schematic diagram of the desulfurization structure according to this utility model; Figure 3 An exploded view of the monitoring component according to this utility model; Figure 4 This is a schematic diagram of a bag filter according to the present invention.
[0015] In the diagram: 1. Desulfurization reactor; 2. Desulfurizing agent silo; 21. Screw feeder; 3. Mixing assembly; 31. Venturi tube; 32. Feed inlet; 33. Input end; 34. Output end; 4. Air inlet pipe; 5. Connecting pipe; 6. Monitoring assembly; 61. SO2 concentration sensor; 62. Particle concentration sensor; 63. Pressure sensor; 7. Baghouse dust collector; 8. Ash silo; 81. Ash pump; 9. Exhaust fan. Detailed Implementation
[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0017] like Figure 1-4As shown in the figure, this embodiment provides a high-efficiency semi-dry flue gas desulfurization device, including a desulfurization reactor 1, a desulfurizing agent silo 2, a mixing component 3, an air inlet pipe 4, a connecting pipe 5, a monitoring component 6, a bag filter 7, an ash silo 8, and an induced draft fan 9. A screw feeder 21 is connected to the lower end of the desulfurizing agent silo 2. The mixing component 3 is connected to the lower end of the screw feeder 21. The front and rear ends of the mixing component 3 are respectively connected to the air inlet pipe 4 and the connecting pipe 5. The desulfurization reactor 1 is connected to the other end of the connecting pipe 5. The other end of the desulfurization reactor 1 is connected to the bag filter 7 through the connecting pipe 5. The lower end of the bag filter 7 is connected to the ash silo 8, and the side is connected to the induced draft fan 9. The top of the ash silo 8 is provided with ash... The material pump 81 and the ash pump 81 are connected to the lower end of the bag filter 7 through a pipeline. A circulation pipeline is provided between the bag filter 7 and the desulfurization reactor 1. A conveying pump is provided on the circulation pipeline to send part of the material collected by the bag filter 7 back to the desulfurization reactor 1. The screw feeder 21 is driven by a variable frequency motor. The variable frequency motor is electrically connected to the equipment control system. The desulfurizing agent silo 2 is connected to the digester system and the hydrated lime powder silo in sequence. The hydrated lime powder silo is connected to the screw feeder 21 through an inclined chute. The desulfurizing agent in the desulfurizing agent silo 2 is processed by the digester system to generate hydrated lime powder. The induced draft fan 9 is a variable frequency speed control motor. The variable frequency speed control motor is electrically connected to the equipment control system. In this embodiment, the mixing component 3 includes a Venturi tube 31, a feed inlet 32, an input end 33, and an output end 34. The feed inlet 32 is located on the side of the Venturi tube 31 and is connected to the lower end of the screw feeder 21. The input end 33 is located at the front end of the Venturi tube 31 and is connected to the air inlet pipe 4. The output end 34 is located at the rear end of the Venturi tube 31 and is connected to the connecting pipe 5. Flue gas is guided through the Venturi tube 31 through the input end 33 and the output end 34. Quicklime powder is introduced into the Venturi tube 31 through the feed inlet 32, so that the flue gas and quicklime powder form turbulence, which can improve the contact area and reaction efficiency between the desulfurizing agent and SO2 in the flue gas. This ensures that the quicklime powder particles can fully coat the SO2 molecules in the flue gas, which can reduce the agglomeration of desulfurizing agent particles and avoid fluctuations in desulfurization efficiency caused by insufficient local reaction. This lays a uniform mixing foundation for the subsequent deep reaction in the desulfurization reactor 1, thereby achieving the purpose of improving the desulfurization effect. In this embodiment, the monitoring component 6 includes an SO2 concentration sensor 61, a particle concentration sensor 62, and a pressure sensor 63. These sensors are respectively installed on the connecting pipe 5, with their detection ends extending into the pipe 5. The SO2 concentration sensor 61, particle concentration sensor 62, and pressure sensor 63 are connected to the equipment control system via shielded cables. The SO2 concentration sensor 61 monitors the SO2 concentration at the input of the desulfurization reactor 1, the particle concentration sensor 62 monitors the particulate matter concentration, and the pressure sensor 63 monitors the gas pressure inside the equipment pipeline. This enables real-time and accurate monitoring of key operating parameters of the desulfurization system. The system can be flexibly adjusted for start-up and shutdown based on the flue gas SO2 concentration, ensuring stable outlet SO2 content under high-sulfur flue gas conditions. This also saves electricity and reduces desulfurization operating costs, ultimately ensuring the system remains in a highly efficient and stable desulfurization operating state, avoiding waste of desulfurizing agents or excessive emissions.
[0018] The working principle and process of this utility model are as follows: In use, quicklime desulfurizer is first processed by a digester system to generate hydrated lime powder, which is stored in a hydrated lime powder silo. Then, it is fed into the Venturi tube 31 of the mixing component 3 via an inclined chute and a screw feeder 21. The system flue gas enters the Venturi tube 31 through the inlet pipe 4, where it mixes thoroughly with the hydrated lime powder in a turbulent flow. It then enters the desulfurization reactor 1, where the hydrated lime powder reacts chemically with SO2 in the flue gas. The reacted flue gas carries most of the desulfurizer into the bag filter 7. The desulfurizer adhering to the filter bag surface continues to react with SO2, and the resulting solid byproducts are collected in the ash silo 8 and discharged by the ash pump 81. Some unreacted desulfurizer is returned to the desulfurization reactor 1 through a circulation pipeline for reuse. The monitoring component 6 monitors the SO2 concentration, particulate matter concentration, and pipeline pressure in real time. The equipment control system adjusts the operating parameters of the screw feeder 21 and the induced draft fan 9 based on the monitoring data to achieve efficient desulfurization and ensure stable SO2 content at the outlet, while saving energy and operating costs.
[0019] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0020] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
Claims
1. A high-efficiency semi-dry flue gas desulfurization device, characterized in that, The system includes a desulfurization reactor (1), a desulfurizing agent silo (2), a mixing component (3), an air inlet pipe (4), a connecting pipe (5), a monitoring component (6), a bag filter (7), an ash silo (8), and an induced draft fan (9). The lower end of the desulfurizing agent silo (2) is connected to a screw feeder (21). The mixing component (3) is connected to the lower end of the screw feeder (21). The front and rear ends of the mixing component (3) are connected to the air inlet pipe (4) and the connecting pipe (5), respectively. The desulfurization reactor (1) is connected to the other end of the connecting pipe (5). The other end of the desulfurization reactor (1) is connected to the bag filter (7) through the connecting pipe (5). The lower end of the bag filter (7) is connected to the ash silo (8), and the side is connected to the induced draft fan (9). The mixing component (3) includes a venturi tube (31), a feed inlet (32), an input end (33), and an output end (34). The feed inlet (32) is located on the side of the venturi tube (31) and communicates with the lower end of the screw feeder (21). The input end (33) is located at the front end of the venturi tube (31) and is connected to the air inlet pipe (4). The output end (34) is located at the rear end of the venturi tube (31) and is connected to the connecting pipe (5). The monitoring component (6) includes an SO2 concentration sensor (61), a particle concentration sensor (62), and a pressure sensor (63). The SO2 concentration sensor (61), the particle concentration sensor (62), and the pressure sensor (63) are respectively installed on the connecting pipe (5), and the detection end extends into the inside of the connecting pipe (5).
2. The high-efficiency semi-dry flue gas desulfurization device according to claim 1, characterized in that: The top of the ash silo (8) is equipped with an ash pump (81), which is connected to the lower end of the bag filter (7) through a pipe.
3. The high-efficiency semi-dry flue gas desulfurization device according to claim 1, characterized in that: The screw feeder (21) is driven by a variable frequency motor, which is electrically connected to the equipment control system.
4. The high-efficiency semi-dry flue gas desulfurization device according to claim 1, characterized in that: The induced draft fan (9) adopts a variable frequency speed control motor, which is electrically connected to the equipment control system.
5. The high-efficiency semi-dry flue gas desulfurization device according to claim 1, characterized in that: The SO2 concentration sensor (61), particle concentration sensor (62), and pressure sensor (63) are respectively connected to the equipment control system via shielded cables.
6. The high-efficiency semi-dry flue gas desulfurization device according to claim 1, characterized in that: A circulation pipe is provided between the bag filter (7) and the desulfurization reactor (1), and a conveying pump is provided on the circulation pipe to send part of the material collected by the bag filter (7) back to the desulfurization reactor (1).
7. The high-efficiency semi-dry flue gas desulfurization device according to claim 1, characterized in that: The desulfurizing agent silo (2) is connected in sequence to a digester system and a slaked lime powder silo. The slaked lime powder silo is connected to a screw feeder (21) via an inclined chute. The desulfurizing agent in the desulfurizing agent silo (2) is processed by the digester system to generate slaked lime powder.