A high-temperature high-dust flue gas sampling device for an oxygen-enriched side-blown furnace
Patent Information
- Application Number
- CN202522326478.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-03
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-03
AI Technical Summary
[0004]为解决现有技术存在的高温高尘烟气容易造成取样探头堵塞，导致取样探头前端的取样孔内的滤芯寿命变短，以及会对取样探头造成严重腐蚀，出现取样不准或中断工况的技术问题，本实用新型提供了如下技术方案
[0011]本实用新型的有益效果，本实用新型的连接管道内设有接尘筒，接尘筒设有与取样管道连接的可拦截大颗粒粉尘的粗滤网部，且取样管道内设有精细滤芯，精细滤芯可对小颗粒粉尘进行拦截，防止其进入探头组件内，防止粉尘对取样探头造成堵塞和腐蚀，大幅提升监测数据有效采集率，确保连续稳定达标排放，规避环保风险，为富氧侧吹炉的运行提供实时、准确的气体成分数据，并减少取样探头的更换频率和维修成本，并延长取样探头的使用寿命。同时，连接管道和出尘管道内积累粉尘较多时，可将出尘管道的手阀打开，在高温高尘烟气的风力作用下，可将连接管道和出尘管道内的粉尘吹离，减少粉尘清理次数，提高对烟气的取样效率。
Smart Images
Figure CN224839578U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flue gas sampling technology, and in particular to a high-temperature, high-dust flue gas sampling device for an oxygen-enriched side-blown furnace. Background Technology
[0002] An oxygen-enriched side-blown furnace is a device used for smelting metals or alloys. Its key feature is the use of a high-concentration oxygen-enriched gas mixed with fuel for combustion, resulting in high-temperature smelting. The main advantage of an oxygen-enriched side-blown furnace is its wide adaptability to the physical specifications and chemical composition of materials. Due to its low cost and broad material adaptability, it is widely used in hazardous waste and solid waste industries. During operation, the furnace uses approximately 99% oxygen mixed with compressed air, resulting in a compressed gas with an oxygen content of about 81%. This oxygen-enriched gas is then introduced into the furnace hearth through a vented water jacket, where it reacts chemically with sulfur, coal, and other substances in the molten metal, generating heat of reaction. During production, the reaction of materials in the furnace produces a large amount of harmful, high-temperature, high-dust flue gas, causing corresponding environmental problems. Therefore, it is necessary to sample and test the high-temperature, high-dust flue gas generated during the smelting process in an oxygen-enriched side-blown furnace for subsequent treatment.
[0003] However, existing oxygen-enriched side-blown furnace flue gas sampling devices have some problems: On the one hand, large particles of dust in high-temperature, high-dust flue gas can easily clog the sampling probe, shortening the lifespan of the filter element in the sampling port at the front of the probe and resulting in a large amount of maintenance work; on the other hand, high-temperature, high-dust dust can severely corrode the sampling probe, leading to inaccurate or interrupted sampling, poor pretreatment of the sampled gas, high analyzer failure rate, and consequently, compromised environmental data (such as sulfur dioxide). CO The inaccurate values for NOx and other gases pose a risk to environmental assessments and also fail to provide real-time and accurate gas composition data for process operations. Utility Model Content
[0004] To address the technical problems in existing technologies, such as high-temperature and high-dust flue gas easily causing clogging of the sampling probe, resulting in a shorter lifespan of the filter element in the sampling hole at the front end of the sampling probe, and causing severe corrosion to the sampling probe, leading to inaccurate sampling or interruption of operation, this utility model provides the following technical solution.
[0005] This utility model discloses a high-temperature, high-dust flue gas sampling device for an oxygen-enriched side-blown furnace. It includes a connecting pipe with a first flange and a second flange respectively at both ends connected to the flue gas pipe of the furnace body. A dust outlet pipe is connected to the end of the connecting pipe away from the furnace body. A hand valve and a dust outlet are provided on the side of the dust outlet pipe away from the connecting pipe. A dust collection cylinder with a coarse filter section is axially connected to the connecting pipe. A sampling pipe is connected to the upper part of the coarse filter section. A probe assembly is connected to the upper end of the sampling pipe.
[0006] As a further technical solution, a positioning post is fixedly provided on the side of the connecting pipe near the furnace body, and a limiting post is fixedly provided on the inner wall of the dust outlet pipe near the connecting pipe to press the dust collection cylinder against it.
[0007] As a further technical solution, the upper part of the connecting pipe has a connecting hole, and the coarse filter part is connected to the sampling pipe through the connecting hole.
[0008] As a further technical solution, the sampling pipe is axially provided with a fine filter element that communicates with the connecting hole and the coarse filter section.
[0009] As a further technical solution, a protective cover is provided on the outer periphery of the probe assembly.
[0010] As a further technical solution, both the connecting pipe and the sampling pipe are provided with observation windows.
[0011] The beneficial effects of this invention are as follows: The connecting pipe is equipped with a dust collection cylinder containing a coarse filter that connects to the sampling pipe to intercept large dust particles. The sampling pipe also contains a fine filter element that intercepts small dust particles, preventing them from entering the probe assembly and causing blockage and corrosion to the sampling probe. This significantly improves the effective acquisition rate of monitoring data, ensures continuous and stable emissions meeting standards, mitigates environmental risks, provides real-time and accurate gas composition data for the operation of the oxygen-enriched side-blown furnace, reduces the frequency of probe replacement and maintenance costs, and extends the probe's lifespan. Furthermore, when a large amount of dust accumulates in the connecting and exhaust pipes, the manual valve of the exhaust pipe can be opened. Under the force of the high-temperature, high-dust flue gas, the dust in the connecting and exhaust pipes can be blown away, reducing the frequency of dust cleaning and improving the sampling efficiency of the flue gas. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the high-temperature, high-dust flue gas sampling device for an oxygen-enriched side-blown furnace according to this utility model. Figure 2 This utility model relates to a high-temperature, high-dust flue gas sampling device for oxygen-enriched side-blown furnaces. Figure 3 This utility model relates to a high-temperature, high-dust flue gas sampling device for oxygen-enriched side-blown furnaces. In the diagram: 1-Connecting pipe; 101-First flange; 102-Second flange; 103-Connecting hole; 104-Positioning post; 2-Dust outlet pipe; 201-Third flange; 202-Hand valve; 203-Dust outlet; 204-Limiting post; 3-Sampling pipe; 4-Protective cover; 5-Probe assembly; 6-Dust collection cylinder; 601-Coarse filter section; 7-Fine filter element. Detailed Implementation
[0013] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.
[0014] In the description of this utility model, it should be understood that the terms "upper" and "lower" are based on the orientation or positional relationship shown in the accompanying drawings and 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. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0015] like Figure 1 As shown, this utility model discloses a high-temperature, high-dust flue gas sampling device for an oxygen-enriched side-blown furnace. It includes a connecting pipe 1 connected to a flue gas pipe in the furnace body, with a first flange 101 and a second flange 102 at each end. The flue gas pipe penetrates the outer wall of the furnace body and is equipped with a connecting flange, which is connected to the first flange 101. High-temperature, high-dust flue gas flows from the flue gas pipe into the connecting pipe 1.
[0016] In a preferred embodiment, the end of the connecting pipe 1 furthest from the furnace body is connected to a dust discharge pipe 2. The dust discharge pipe 2 is equipped with a third flange 201, which is fixedly connected to the second flange 102. A sampling pipe 3 is connected to the upper part of the connecting pipe 1. A probe assembly 5 is connected to the upper end of the sampling pipe 3. High-temperature, high-dust flue gas enters the connecting pipe 1 from the furnace body flue gas pipe and flows upwards from the connecting pipe 1 into the sampling pipe 3. The sampling probe of the probe assembly 5 can extend into the sampling pipe 3 to sample and monitor the flue gas. The probe assembly 5 is existing technology, therefore its structure and usage will not be described in detail.
[0017] In this embodiment, the sampling pipe 3 is inclined relative to the connecting pipe 1, forming a Y-shaped pipe structure. After the dust-laden gas enters the sampling pipe 3 from the connecting pipe 1, the dust can fall back to the connecting pipe 1 under gravity, reducing the adverse effects of dust on the sampling probe inside the probe assembly 5. Meanwhile, since the entire sampling device is used outdoors, a protective cover 4 is provided around the probe assembly 5. The protective cover 4 can accommodate various cables and prevent adverse effects from severe weather on the probe assembly 5.
[0018] Meanwhile, a hand valve 202 and a dust outlet 203 are provided on the side of the dust outlet pipe 2 away from the connecting pipe 1. When the probe assembly 5 takes a sample in the sampling pipe 3, the hand valve 202 is closed. When it is necessary to clean the dust in the connecting pipe 1, the hand valve 202 is opened, and the flue gas in the furnace flue pipe will blow the dust in the connecting pipe 1 out from the dust outlet pipe 2 and the dust outlet 203. The dust can be cleaned simply by opening the hand valve 202, which is highly efficient.
[0019] like Figure 2 and Figure 3 As shown, in a preferred embodiment, a dust collection cylinder 6 with a coarse filter section 601 is axially connected to the connecting pipe 1. In this case, the upper connecting hole 103 of the connecting pipe 1 and the sampling pipe 3 are welded and fixed to the connecting pipe 1 outside the connecting hole 103. The coarse filter section 601 is connected to the sampling pipe 3 through the connecting hole 103. When flue gas containing large dust particles passes through the coarse filter section 601, the large dust particles are blocked inside the dust collection cylinder 6, while other flue gas flows into the sampling pipe 3. The sampling pipe 3 is axially provided with a fine filter element 7 that communicates with the connecting hole 103 and the coarse filter section 601. The fine filter element 7 can filter out small dust particles contained in the flue gas. After passing through the fine filter element 7, the flue gas is sampled and detected by the sampling probe of the probe assembly 5. Therefore, the flue gas after being filtered by both the coarse filter section 601 and the fine filter element 7 can intercept large and small dust particles, preventing them from entering the probe assembly 5, avoiding dust from clogging and corroding the sampling probe, reducing the replacement frequency and maintenance cost of the sampling probe, and extending the service life of the sampling probe.
[0020] In a preferred embodiment, a positioning post 104 is fixedly provided on the side of the connecting pipe 1 near the furnace body, and a limiting post 204 is fixedly provided on the inner wall of the dust discharge pipe 2 near the connecting pipe 1 to press the dust collection cylinder 6 against it. The dust collection cylinder 6 is placed between the positioning post 104 and the limiting post 204. When the third flange 201 is connected and fixed to the second flange 102, the dust collection cylinder 6 is fixed between the positioning post 104 and the limiting post 204. At this time, both the connecting pipe 1 and the sampling pipe 3 are provided with observation windows made of high-temperature resistant quartz glass, which are used to observe the usage status of the dust collection cylinder 6 and the fine filter element 7, facilitating replacement when there is too much dust.
[0021] The preferred embodiments and examples of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments and examples. Within the scope of knowledge possessed by those skilled in the art, various changes or equivalent substitutions can be made without departing from the concept of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.
Claims
1. A high-temperature, high-dust flue gas sampling device for an oxygen-enriched side-blown furnace, comprising a connecting pipe (1) with a first flange (101) and a second flange (102) respectively at both ends connected to the flue gas pipe of the furnace body, characterized in that: The end of the connecting pipe (1) away from the furnace body is connected to a dust discharge pipe (2). The dust discharge pipe (2) is provided with a hand valve (202) and a dust outlet (203) on the side away from the connecting pipe (1). The connecting pipe (1) is axially connected to a dust collection cylinder (6) with a coarse filter section (601). The upper part of the coarse filter section (601) is connected to a sampling pipe (3). The upper end of the sampling pipe (3) is connected to a probe assembly (5).
2. The high-temperature, high-dust flue gas sampling device for an oxygen-enriched side-blown furnace according to claim 1, characterized in that: The connecting pipe (1) is fixedly provided with a positioning post (104) on the side near the furnace body, and the dust discharge pipe (2) is fixedly provided with a limiting post (204) on the inner wall of the side near the connecting pipe (1) to press the dust collection cylinder (6).
3. The high-temperature, high-dust flue gas sampling device for an oxygen-enriched side-blown furnace according to claim 1, characterized in that: The upper connecting hole (103) of the connecting pipe (1) connects the coarse filter section (601) to the sampling pipe (3) through the connecting hole (103).
4. The high-temperature, high-dust flue gas sampling device for an oxygen-enriched side-blown furnace according to claim 3, characterized in that: The sampling pipe (3) is axially provided with a fine filter element (7) that communicates with the connecting hole (103) and the coarse filter section (601).
5. The high-temperature, high-dust flue gas sampling device for an oxygen-enriched side-blown furnace according to claim 1, characterized in that: The probe assembly (5) is provided with a protective cover (4) on its outer periphery.
6. The high-temperature, high-dust flue gas sampling device for an oxygen-enriched side-blown furnace according to claim 1, characterized in that: Both the connecting pipe (1) and the sampling pipe (3) are provided with observation windows.