A sampling pipeline for an ammonia supply pressure transmitter and an ammonia denitrification sampling system

Abstract

This application discloses an ammonia supply pressure transmitter sampling pipeline and an ammonia denitrification sampling system. The ammonia supply pressure transmitter sampling pipeline includes: a pipeline body, which includes at least an upper pipeline, a middle pipeline, and a lower pipeline. The upper pipeline is fixedly connected to the pressure transmitter, and the lower pipeline is fixedly connected to the ammonia supply pipeline; and a heating device disposed on the pipeline body. The inner diameter of the pipeline body is in the range of 1 / 4 inch ≤ φ ≤ 1 / 2 inch. The upper, middle, and lower pipelines are sequentially and sealed together by a connecting structure. This ammonia supply pressure transmitter sampling pipeline can effectively reduce pipeline blockage caused by crystallization.

Description

Technical Field

[0001] The embodiments of this utility model relate to the field of flue gas denitrification technology. More specifically, this utility model relates to an ammonia supply pressure transmitter sampling pipeline and an ammonia supply denitrification sampling system using the same. Background Technology

[0002] Thermal power generating units emit nitrogen oxides during production. Excessive nitrogen oxide emissions not only pollute the environment but also restrict the economic benefits of the units. Therefore, denitrification treatment is carried out on the emitted nitrogen oxides. Flue gas denitrification often uses ammonia as a reducing agent to decompose nitrogen oxides in the flue gas into nitrogen and water. This method has high nitrogen oxide removal efficiency and is widely used in the power industry.

[0003] In ammonia supply systems, the sampling lines of pressure transmitters are exposed to low-temperature or high-humidity environments for extended periods. Ammonia gas easily combines with moisture or impurities to form crystals, leading to line blockage, measurement errors at pressure points, or equipment failure. Currently, the common methods for dealing with crystal blockage in sampling lines are manual cleaning or heating the lines with accompanying steam to prevent crystallization. However, manual cleaning is time-consuming and labor-intensive, and can easily damage the equipment; steam heating is energy-intensive, and the heat tracing material is often too hard to form a tight contact with the sampling line, leading to heat loss and wasted heat, resulting in insufficient heating temperature and continued crystallization inside the line.

[0004] Therefore, those skilled in the art urgently need to find a sampling pipeline for ammonia pressure transmitter that can reduce the occurrence of pipeline blockage caused by crystallization. Utility Model Content

[0005] To address one or more of the technical problems mentioned above, this utility model provides an ammonia supply pressure transmitter sampling pipeline and an ammonia supply denitrification sampling system using the same. This ammonia supply pressure transmitter sampling pipeline can reduce the occurrence of pipeline blockage caused by crystallization.

[0006] According to a first aspect of this utility model, a sampling pipeline for an ammonia supply pressure transmitter is provided. The ammonia supply pressure transmitter sampling pipeline includes: a pipeline body, which includes at least an upper pipeline, a middle pipeline, and a lower pipeline; the upper pipeline is fixedly connected to the pressure transmitter, and the lower pipeline is fixedly connected to the ammonia supply pipeline; and a heating device disposed on the pipeline body. The inner diameter of the pipeline body is in the range of 1 / 4 inch ≤ φ ≤ 1 / 2 inch, and the upper, middle, and lower pipelines are sequentially and sealed together by a connecting structure.

[0007] In some embodiments, the inner diameter of the pipe body is in the range of 1 / 4 inch ≤ φ < 1 / 2 inch, and the length of the pipe body is ≤ 3m.

[0008] In some embodiments, the inner diameter of the pipe body is 1 / 2 inch, and the length of the pipe body is greater than 3m.

[0009] In some embodiments, the connection structure is a flange structure, and sealing gaskets are also provided between adjacent upper, middle and lower pipe sections.

[0010] In some embodiments, a shut-off valve is provided on the intermediate section of the pipeline, which is used to cut off, regulate, and throttle the fluid medium within the pipeline body.

[0011] In some embodiments, the heating device includes an electric heating band and a temperature control unit disposed on the electric heating band, the temperature control unit being used to control the electric heating band to maintain a preset temperature value.

[0012] In some embodiments, the electric heating tape is spirally wound and attached along the outer peripheral wall of the pipe body.

[0013] In some embodiments, the heating device further includes an insulation layer for wrapping the electric heating band.

[0014] In some embodiments, a control system is also included, which is electrically connected to the heating device.

[0015] According to a second aspect of this utility model, an ammonia denitrification sampling system is provided, comprising a pressure transmitter and the aforementioned ammonia supply pressure transmitter sampling pipeline. The interface size of the pressure transmitter is equal to the diameter of the pipeline body.

[0016] The sampling pipeline for the ammonia pressure transmitter provided above enhances the anti-clogging performance of the pipeline. While the increased pipe diameter allows for a small amount of crystallization, the heating device further prevents crystallization inside the pipe, thus ensuring the normal operation of the pressure transmitter. Attached Figure Description

[0017] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0018] Figure 1 This is a schematic diagram of the sampling pipeline of the ammonia supply pressure transmitter according to an embodiment of the present invention. Detailed Implementation

[0019] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0020] According to a first aspect of this utility model, a sampling pipeline 100 for an ammonia pressure transmitter is provided. Figure 1 The structure of the sampling pipeline 100 of the ammonia supply pressure transmitter according to an embodiment of the present invention is shown. Figure 1 As shown, the ammonia supply pressure transmitter sampling pipeline 100 includes: a pipeline body 1, which includes at least an upper pipeline 11, a middle pipeline 12, and a lower pipeline 13. The upper pipeline 11 is fixedly connected to the pressure transmitter 200, and the lower pipeline 13 is fixedly connected to the ammonia supply pipeline; and a heating device 2, which is disposed on the pipeline body 1. The inner diameter of the pipeline body 1 is in the range of 1 / 4 inch ≤ φ ≤ 1 / 2 inch. The upper pipeline 11, the middle pipeline 12, and the lower pipeline 13 are sequentially and sealed together by a connecting structure 3.

[0021] In practical use, the ammonia supply pressure transmitter sampling pipeline 100 according to an embodiment of the present invention consists of an upper pipeline 11, a middle pipeline 12, and a lower pipeline 13 sequentially sealed together by a connecting structure 3. The upper pipeline 11 is fixedly connected to the pressure transmitter 200, and the lower pipeline 13 is welded to the ammonia supply pipeline in the ammonia supply system for sampling via the sampling pipeline 100. Compared with the prior art, the ammonia supply pressure transmitter sampling pipeline 100 according to this embodiment of the present invention is used in conjunction with a heating device 2. Furthermore, the size of the pipeline body 1 is changed to a thicker pipe structure with a diameter of 1 / 4 inch ≤ φ ≤ 1 / 2 inch. The increased inner diameter of the thicker pipe structure increases the internal flow space of the sampling pipeline 100. In this way, on the one hand, by increasing the pipe diameter, even if crystallization occurs on the inner wall of the sampling pipeline 100, the flow capacity can still be maintained when the thickness of the crystallization layer is not large, and it is not easy to block the flow. The pressure transmitter 200 can still be used normally. On the other hand, with the setting of the heating device 2, the temperature of the pipeline body 1 is increased, which effectively avoids the sampling pipeline from being exposed to low temperature or high humidity environment for a long time. This allows the sampling pipeline 100 of the ammonia supply pressure transmitter in this embodiment of the present invention to effectively prevent the pipeline blockage problem caused by crystallization.

[0022] With the above settings, the sampling pipeline 100 of the ammonia supply pressure transmitter according to the present utility model embodiment is optimized, the anti-blocking performance of the sampling pipeline 100 is improved, the pipe diameter is increased to allow a small amount of crystallization, and the heating device 2 can further prevent crystallization inside the pipe, thereby ensuring the normal use of the pressure transmitter 200.

[0023] It should be added that the inner diameter of the pipe body 1 with a diameter of 1 / 4 inch ≤ φ ≤ 1 / 2 inch can also be expressed by the nominal diameter DN8 ≤ φ ≤ DN15.

[0024] In some embodiments, the inner diameter of the pipe body 1 is in the range of 1 / 4 inch ≤ φ < 1 / 2 inch, and the length L of the pipe body 1 is ≤ 3m.

[0025] In this application, the length L of the pipeline body 1 is ≤3m. Compared with the prior art, while increasing the inner diameter of the sampling pipeline 100, the length L of the sampling pipeline 100 is also shortened. The shortening of the length L of the sampling pipeline 100 reduces the flow time of ammonia in the sampling pipeline 100. At the same time, it also reduces the temperature difference between the beginning and end of the sampling pipeline 100, thereby effectively avoiding the problem of low-temperature crystallization at the end due to excessive pipeline length, and further solving the problem of pipeline blockage caused by crystallization in the sampling pipeline 100.

[0026] In some embodiments, the inner diameter of the pipe body 1 is 1 / 2 inch, and the length L of the pipe body 1 is greater than 3m.

[0027] In this application, the length L of the sampling pipeline 100 can also be greater than 3m. If the sampling pipeline 100 exceeds 3m, the inner diameter of the pipeline body 1 needs to be increased to 1 / 2 inch, which is the nominal diameter DN15. This setting can effectively reduce the pressure loss along the sampling pipeline 100. For example, when the length L is 5m, the pressure attenuation of the DN15 pipeline is about 40% lower than that of the DN10.

[0028] In some embodiments, the connection structure 3 may be a flange structure, and a sealing gasket (not shown in the figure) is also provided between adjacent upper section pipe 11, middle section pipe 12 and lower section pipe 13.

[0029] In this application, the flange structure is formed at the connection position on the upper section pipe 11, the middle section pipe 12 and the lower section pipe 13. Since the sampling pipe 100 of this application is enlarged to avoid crystallization problems, the flange structure can replace the standard pipe fittings to facilitate the connection of the enlarged upper section pipe 11, the middle section pipe 12 and the lower section pipe 13.

[0030] Please refer to Figure 1 In some embodiments, a shut-off valve 121 is provided on the intermediate section of the pipeline 12. The intermediate section of the pipeline 12 is used to cut off, regulate and throttle the fluid medium in the pipeline body 1 so as to control the flow rate of the fluid medium in the sampling pipeline 100 when it takes samples.

[0031] Please continue to refer to Figure 1In some embodiments, the heating device 2 may include an electric heating belt and a temperature control unit disposed on the electric heating belt, the temperature control unit being used to control the electric heating belt to maintain a preset temperature value.

[0032] In this application, the heating device 2 uses electric heating. Compared with the high energy consumption and easy heat loss of steam heating in the prior art, electric heating, combined with the expansion and shortening of the sampling pipeline 100 in this application, can reduce the heating power consumption. Furthermore, electric heating provides more uniform heating, effectively preventing crystallization within the sampling pipeline 100. Further, this application uses an electric heating belt with a built-in temperature control unit. Through the built-in temperature control unit, the temperature of the electric heating belt can remain consistent, ensuring a constant and uniform heating temperature for the sampling pipeline 100. In this application, the preset temperature value of the electric heating belt is greater than 100℃.

[0033] Please continue to refer to Figure 1 In some embodiments, the electric heating tape is spirally wound and attached along the outer peripheral wall of the pipe body 1.

[0034] In this application, the electric heating belt is wrapped around the outer surface of the sampling pipeline 100 in a spiral manner by means of a flexible cable, and the close fit between the heating belt and the sampling pipeline 100 can improve the heating efficiency.

[0035] Please continue to refer to Figure 1 In some embodiments, the heating device 2 may also include an insulation layer 21, which is used to wrap the electric heating band to reduce heat loss.

[0036] In some embodiments, a control system (not shown) is also included, which is electrically connected to the heating device 2.

[0037] In this application, the control system can be used to obtain the real-time temperature of the heating device 2, or to adjust the preset temperature of the heating device 2, so that the heating device 2 can provide a more stable heating effect to the sampling pipeline 100.

[0038] According to a second aspect of the present invention, an ammonia denitrification sampling system is provided, including a pressure transmitter 200 and the aforementioned ammonia supply pressure transmitter sampling pipeline 100, wherein the interface size of the pressure transmitter 200 is equal to the diameter of the pipeline body 1.

[0039] In this application, the pressure transmitter 200 is connected to the pipeline body 1 via a flange. In this application, the interface size of the pressure transmitter 200 is equal to the diameter of the expanded pipeline body 1. As can be seen from the above, after the expanded pipeline body 1 is connected to the pressure transmitter 200 with its enlarged interface size, crystallization is less likely to occur at the connection between the pressure transmitter 200 and the pipeline body 1.

[0040] In the foregoing description of this application, unless otherwise expressly specified and limited, the terms "fixed," "installed," "connected," or "linked" should be interpreted broadly. For example, the term "linked" can refer to 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; or it can refer to the internal communication of two components or the interaction between two components. Therefore, unless otherwise expressly limited in this application, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] Based on the above description of this application, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "length," "width," "thickness," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "center," "longitudinal," "transverse," "clockwise," or "counterclockwise," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this application. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as a limitation on the present invention.

[0042] Furthermore, the terms "first" or "second," etc., used in this application to refer to numbers or ordinal numbers are for descriptive purposes only and should not be construed as explicitly or implicitly indicating relative importance or specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, or more, unless otherwise explicitly specified.

[0043] While various embodiments of the present invention have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of the present invention. It should be understood that various alternatives to the embodiments of the present invention described herein may be employed in the practice of the present invention. The appended claims are intended to define the scope of protection of the present invention and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A sampling line for an ammonia pressure transmitter, comprising: include: The pipeline body includes at least an upper section, a middle section, and a lower section, wherein the upper section is fixedly connected to a pressure transmitter, and the lower section is fixedly connected to an ammonia supply pipeline; and, A heating device is installed on the pipeline body; The inner diameter of the pipeline body is in the range of 1 / 4 inch ≤ φ ≤ 1 / 2 inch, and the upper section, the middle section, and the lower section are sequentially and sealed together by a connecting structure.

2. The ammonia pressure transmitter sampling line of claim 1, wherein, The inner diameter of the pipe body is in the range of 1 / 4 inch ≤ φ < 1 / 2 inch, and the length of the pipe body is ≤ 3m.

3. The ammonia pressure transmitter sampling line of claim 1, wherein, The inner diameter of the pipe body is 1 / 2 inch, and the length of the pipe body is greater than 3m.

4. The ammonia pressure transmitter sampling line of any one of claims 1-3, wherein, The connection structure is a flange structure, and sealing gaskets are also provided between adjacent upper section pipe, middle section pipe and lower section pipe.

5. The ammonia pressure transmitter sampling line of any one of claims 1-3, wherein, A shut-off valve is installed on the middle section of the pipeline, which is used to cut off, regulate and throttle the fluid medium in the pipeline body.

6. The ammonia pressure transmitter sampling line of any one of claims 1-3, wherein, The heating device includes an electric heating belt and a temperature control unit disposed on the electric heating belt. The temperature control unit is used to control the electric heating belt to maintain a preset temperature value.

7. The ammonia pressure transmitter sampling line of claim 6, wherein, The electric heating strip is spirally wound and attached along the outer peripheral wall of the pipeline body.

8. The ammonia pressure transmitter sampling line of claim 6, wherein, The heating device also includes an insulation layer for wrapping the electric heating band.

9. The ammonia pressure transmitter sampling line of claim 1 wherein, It also includes a control system, which is electrically connected to the heating device.

10. An ammonia slip sampling system, comprising: It includes a pressure transmitter and a sampling pipeline for the ammonia supply pressure transmitter according to any one of claims 1 to 9, wherein the interface size of the pressure transmitter is equal to the diameter of the pipeline body.

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