Self-made boiler denitration CEMS heat tracing sampling pipeline
By using a self-made boiler denitrification CEMS heat tracing sampling pipeline with a design of conductive pipe and heat-conducting ring, combined with the control of thermal resistance and temperature controller, the problems of poor heat tracing effect and air leakage of sampling pipe were solved, achieving stable heat tracing effect and accurate monitoring data, and reducing equipment maintenance time.
Patent Information
- Application Number
- CN202422143460.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-10-31
- Estimated Expiration
- 2034-09-02
AI Technical Summary
The boiler denitrification CEMS heat tracing sampling pipeline often suffers from poor heat tracing effect and damage to the sampling pipe, resulting in inaccurate flue gas environmental parameters. Moreover, the procurement cycle for replacing the original sampling pipeline is long, posing potential environmental protection risks to production.
The design and manufacture of a boiler denitrification CEMS heat tracing sampling pipeline includes a sampling tube, electric heat tracing tape, insulation cotton and sheath. By setting a conductive pipe and heat conduction ring on the outside of the electric heat tracing tape, and using a thermal resistance and temperature controller to control the heating of the heat tracing tape, uniform temperature transfer and stability are achieved.
It improves the heat tracing effect and stability, extends the service life of the sampling tube, ensures the accuracy of flue gas monitoring data and the continuity of environmentally friendly production, and reduces the equipment maintenance cycle.
Smart Images
Figure CN223500723U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of heat tracing pipeline technology, specifically a self-made boiler denitrification CEMS heat tracing sampling pipeline. Background Technology
[0002] The boiler denitrification CEMS heated sampling pipeline is an important device for monitoring pollutants such as nitrogen oxides (NOx) in the flue gas emitted during boiler combustion. It is a system that integrates sampling, heating, insulation and transmission functions. Its main purpose is to accurately and continuously extract flue gas samples from the boiler flue and maintain the temperature of the samples during transmission through heating technology to prevent water vapor in the flue gas from condensing into water or other components from changing, thereby ensuring the accuracy and reliability of the monitoring data.
[0003] The boiler denitrification CEMS heat tracing sampling pipeline often experiences poor heat tracing effect and damage and leakage of the sampling pipe, resulting in inaccurate environmental parameters of the denitrification CEMS flue gas. Replacing the original sampling pipeline with the original one has a long procurement cycle, which poses certain risks to the company's environmental protection production. Therefore, we proposed to manufacture our own boiler denitrification CEMS heat tracing sampling pipeline in order to solve the above-mentioned problems. Utility Model Content
[0004] The purpose of this utility model is to provide a self-made boiler denitrification CEMS heat tracing sampling pipeline to solve the problems mentioned in the background art, such as poor heat tracing effect and damage and leakage of sampling pipes, which lead to inaccurate environmental parameters of denitrification CEMS flue gas. Replacing the original sampling pipeline with a long procurement cycle also poses certain hidden dangers to the company's environmental protection production.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a self-made boiler denitrification CEMS heat tracing sampling pipeline, including sampling tubes and electric heat tracing tape, wherein three sampling tubes are arranged around the electric heat tracing tape, and the outside of the sampling tubes is covered with heat insulation cotton, and the outside of the heat insulation cotton is covered with a protective sleeve.
[0006] Also includes:
[0007] A conductive tube is fitted over the outside of the electric heating tape. A heat-conducting ring is integrally formed on the outside of the conductive tube and is fitted over the outside of the sampling tube. A thermal resistor is installed inside the electric heating tape. The thermal resistor is connected to a temperature controller, which is connected to a solid-state relay.
[0008] Preferably, the sheath is a high-temperature resistant polytetrafluoroethylene (PTFE) flexible tube.
[0009] Preferably, the insulation cotton is an aluminum silicate needled blanket.
[0010] Preferably, the sampling tube is a heat-welded tube.
[0011] Preferably, the surface of the conductive tube is provided with a second heat dissipation groove, and the second heat dissipation groove communicates with the interior of the conductive tube.
[0012] Preferably, the heat-conducting ring has a first heat dissipation groove on its outer side, and the first heat dissipation groove is connected to the interior of the heat-conducting ring.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. A thermal resistor is added to the heat tracing sampling pipeline, and the real-time temperature of the heat tracing pipeline is fed back to a temperature controller. The temperature controller's PID control is used to connect an external solid-state relay (since the power of the equipment that the temperature controller can directly connect to cannot exceed 1KW, an external solid-state relay is required) to ultimately control the heating of the heat tracing cable. This temperature control method can both ensure the service life of the heat tracing pipeline and meet the actual needs of the equipment.
[0015] 2. By installing a conductive tube around the outside of the electric heating tape and connecting a heat-conducting ring around the conductive tube, and placing the heat-conducting ring around the outside of the sampling tube, the heat generated by the electric heating tape can be evenly transferred to the heat-conducting ring through the conductive tube. Since the heat-conducting ring is placed around the outside of the sampling tube, the heat can be evenly transferred to the surrounding area of the sampling tube, thereby improving the heating effect and stability. Heat dissipation grooves are provided around both the conductive tube and the heat-conducting ring to allow heat to dissipate and prevent heat from accumulating inside the heat-conducting ring and the conductive tube, which would cause the temperature to rise too high. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a front view of the overall structure of this utility model;
[0018] Figure 3 This is a schematic diagram of the conductive tube and heat-conducting ring of this utility model;
[0019] Figure 4 This is a system diagram of the present invention;
[0020] In the diagram: 1. Sheath; 2. Insulation cotton; 3. Sampling tube; 4. Electric heating tape; 5. Conductive tube; 6. Heat-conducting ring; 7. First heat dissipation groove; 8. Second heat dissipation groove; 9. Temperature controller; 10. Solid-state relay; 11. Resistance temperature detector. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.
[0022] Please see Figure 1-4 An embodiment of this utility model is provided: a self-made boiler denitrification CEMS heat tracing sampling pipeline, including a sampling pipe 3 and an electric heat tracing tape 4. Three sampling pipes 3 are arranged around the electric heat tracing tape 4. The outside of the sampling pipe 3 is covered with heat insulation cotton 2, and the outside of the heat insulation cotton 2 is covered with a protective sleeve 1.
[0023] Also includes:
[0024] The conductive tube 5 is sleeved on the outside of the electric heating tape 4. A heat-conducting ring 6 is integrally formed on the outside of the conductive tube 5, and the heat-conducting ring 6 is sleeved on the outside of the sampling tube 3. A thermal resistor 11 is installed inside the electric heating tape 4. The thermal resistor 11 is connected to the temperature controller 9, and the temperature controller 9 is connected to the solid-state relay 10.
[0025] The thermal resistor 11 feeds back the real-time temperature of the heating pipeline to the temperature controller 9. The temperature controller 9 uses PID control to connect an external solid-state relay 10 to ultimately control the heating of the heating cable. This temperature control method can ensure the service life of the heating pipeline and meet the actual needs of the equipment. At the same time, a conductive pipe 5 is set on the outside of the electric heating cable 4 and connected to the heat-conducting ring 6 outside the sampling tube 3, so that the heat of the electric heating cable 4 is evenly transferred to the surrounding area of the sampling tube 3, thereby improving the heating effect and stability.
[0026] Please see Figure 1 Sheath 1 is a high-temperature resistant polytetrafluoroethylene hose, which gives sheath 1 the function of high temperature resistance.
[0027] Please see Figure 1 Insulation cotton 2 is aluminum silicate needled blanket, which has the characteristics of high temperature resistance and strong stability.
[0028] Please see Figure 1 Sampling tube 3 is a heat-welded tube, which improves the thermal conductivity and stability of sampling tube 3.
[0029] Please see Figure 3 The surface of the conductive tube 5 is provided with a second heat dissipation groove 8, and the second heat dissipation groove 8 is connected to the interior of the conductive tube 5 to prevent heat accumulation in the conductive tube 5.
[0030] Please see Figure 3 The heat-conducting ring 6 has a first heat dissipation groove 7 on its outside, and the first heat dissipation groove 7 is connected to the inside of the heat-conducting ring 6 to prevent heat accumulation in the heat-conducting ring 6.
[0031] Working principle: A thermal resistor 11 is added inside the heat tracing sampling tube 3 to provide real-time temperature feedback to the temperature controller 9. The temperature controller 9 uses PID control to connect an external solid-state relay 10 (since the power of the equipment that the temperature controller 9 can directly connect to cannot exceed 1KW, an external solid-state relay 10 is required) to ultimately control the heating of the heat tracing cable. This temperature control method ensures both the service life of the heat tracing cable and meets the actual needs of the equipment. Simultaneously, a conductive tube 5 is fitted around the outside of the electric heat tracing cable 4, and a heat-conducting ring 6 is connected around the conductive tube 5. The heat-conducting ring 6, fitted outside the sampling tube 3, allows the heat generated by the electric heat tracing cable 4 to be evenly transferred to the heat-conducting ring 6 through the conductive tube 5. Because the heat-conducting ring 6 is fitted outside the sampling tube 3, it can evenly transfer heat around the sampling tube 3, thereby improving the heating effect and stability.
[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.
Claims
1. A self-made boiler denitrification CEMS heat tracing sampling pipeline, including a sampling tube (3) and an electric heat tracing tape (4). The sampling tube (3) is provided in three places and arranged around the electric heat tracing tape (4). The outside of the sampling tube (3) is provided with heat insulation cotton (2), and the outside of the heat insulation cotton (2) is provided with a protective sleeve (1). Its features are: Also includes: A conductive tube (5) is fitted over the outside of the electric heating tape (4). A heat-conducting ring (6) is integrally formed on the outside of the conductive tube (5), and the heat-conducting ring (6) is fitted over the outside of the sampling tube (3). A thermal resistor (11) is installed inside the electric heating tape (4). The thermal resistor (11) is electrically connected to the temperature controller (9). The temperature controller (9) is electrically connected to the solid-state relay (10).
2. The self-made boiler denitrification CEMS heat tracing sampling pipeline according to claim 1, characterized in that: The sheath (1) is a high-temperature resistant polytetrafluoroethylene hose.
3. The self-made boiler denitrification CEMS heat tracing sampling pipeline according to claim 1, characterized in that: The insulation cotton (2) is aluminum silicate needle-punched blanket.
4. The self-made boiler denitrification CEMS heat tracing sampling pipeline according to claim 1, characterized in that: The sampling tube (3) is a heat-welded tube.
5. The self-made boiler denitrification CEMS heat tracing sampling pipeline according to claim 1, characterized in that: The surface of the conductive tube (5) is provided with a second heat dissipation groove (8), and the second heat dissipation groove (8) is connected to the interior of the conductive tube (5).
6. The self-made boiler denitrification CEMS heat tracing sampling pipeline according to claim 1, characterized in that: The heat-conducting ring (6) is provided with a first heat dissipation groove (7) on its outside, and the first heat dissipation groove (7) is connected to the inside of the heat-conducting ring (6).