Heat tracing band device for high-temperature flue gas sampling pipeline

Abstract

The utility model discloses a high-temperature flue gas sampling pipeline heat tracing band device which comprises a sheath, one end of the sheath is fixedly connected with an installation ring, the other end of the sheath is fixedly connected with a sampling head, a PTC heat tracing band, a sampling pipe and a blowback pipe are arranged in the sheath, the PTC heat tracing band is located between the sampling pipe and the blowback pipe, and the PTC heat tracing band is connected with the sampling pipe. Flame-retardant filling particles are arranged on the peripheries of the PTC heat tracing band, the sampling tube and the blowback tube, heat reflection film sets are arranged on the outer sides of the flame-retardant filling particles, a heat preservation layer is arranged between the heat reflection film sets on the two sides, the sheath is in threaded connection with a detection box through a mounting ring, a connecting ring matched with the mounting ring is arranged on the detection box, and the PTC heat tracing band is arranged in the detection box. A filter screen plate is arranged between the mounting ring and the connecting ring, and the blowback pipe penetrates through the filter screen plate. Through the structure, the problem that cleaning and maintenance are inconvenient is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to dermatological medicine applying technology field especially relates to a high temperature flue gas sampling pipeline heat tracing band device. BACKGROUND

[0002] Flue gas is the mixture of gas and smoke, and is the main cause of air pollution in residential areas. The composition of flue gas is very complex, including water vapor, sulfur dioxide, nitrogen, oxygen, carbon monoxide, carbon dioxide, hydrocarbons and nitrogen oxides, etc. in the gas, and smoke including ash, coal particles, oil droplets and high-temperature cracking products, etc. Therefore, the pollution of flue gas to the environment is the combined pollution of multiple toxicants. The harmfulness of smoke to human body is related to the size of particles, and the smoke with a diameter less than 10 um, especially the smoke with a diameter of 1-2.5 um, is most harmful to human body.

[0003] In the process of applying for a patent, it is found through retrieval that the Chinese patent with the patent number CN202420258097.5: a flue gas heat tracing sampling pipe, comprising a sheath, further comprising a PTC heat tracing band, the two sides of the PTC heat tracing band are respectively provided with a sampling pipe and a back flushing pipe, the outside of the back flushing pipe is wrapped with a heat retardation layer, the outside of the PTC heat tracing band, the sampling pipe and the heat retardation layer is provided with a second heat reflecting film, the sheath and the second heat reflecting film are provided with a heat preservation layer. However, the sampling pipe is used for a period of time, a large amount of smoke mixture is attached to the inner wall of the sampling port, which causes the cleaning to be very inconvenient, and further affects the sampling effect, so it needs to be improved. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of the prior art, the utility model provides a high temperature flue gas sampling pipeline heat tracing band device, which solves the problems of inconvenient cleaning and maintenance.

[0005] The utility model also provides a high temperature flue gas sampling pipeline heat tracing band device, which comprises a sheath, the sheath one end fixedly connected with the mounting ring, and the other end fixedly connected with the sampling head, the sheath inside is equipped with PTC heat tracing band, sampling pipe and back flushing pipe, the PTC heat tracing band is located the intermediate position of sampling pipe and back flushing pipe, the PTC heat tracing band, sampling pipe and back flushing pipe periphery are equipped with fire -retardant filling particle, the fire -retardant filling particle outside is equipped with heat reflecting film group, the heat reflecting film group between both sides is equipped with heat preservation layer, the sheath is connected with the detection box through the mounting ring screw thread, be equipped with the connecting ring that is suitable for the mounting ring on the detection box, be equipped with filter screen between the mounting ring and the connecting ring, the back flushing pipe passes through filter screen.

[0006] According to the high temperature flue gas sampling pipeline heat tracing band device, the sampling pipe has three, and is connected with the PTC heat tracing band.

[0007] According to the high-temperature flue gas sampling pipeline heat tracing band device, the reverse blowing pipe is in contact with the PTC heat tracing band.

[0008] According to the high-temperature flue gas sampling pipeline heat tracing band device, the sheath material is a polyethylene (PE) or polyvinyl chloride (PVC) protective sheath composite.

[0009] According to the high-temperature flue gas sampling pipeline heat tracing band device, the sampling pipe material is a high-performance resin resistant to corrosion.

[0010] According to the high-temperature flue gas sampling pipeline heat tracing band device, the detection box is fixedly connected with a display screen at the front side, and a sealing door is hinged to the detection box below the display screen.

[0011] According to the high-temperature flue gas sampling pipeline heat tracing band device, the reverse blowing pipe output end is located in the detection box and is fixedly connected with a reverse blowing gas device.

[0012] The high-temperature flue gas sampling pipeline heat tracing band device has the following beneficial effects:

[0013] In the high-temperature flue gas sampling pipeline heat tracing band device, the filter screen plate is arranged between the mounting ring and the connecting ring, when sampling, the flue gas in the sampling pipe is intercepted by the filter screen plate to remove part of the smoke dust mixture, and after a period of use, the filter screen plate is removed from the mounting ring, and then the filter screen plate is cleaned, so that the cleanliness of the detection box is ensured, and the later maintenance is facilitated.

[0014] Additional aspects and advantages of the high-temperature flue gas sampling pipeline heat tracing band device will be partially given in the following description, partially will become obvious from the following description, or will be understood by the practice of the high-temperature flue gas sampling pipeline heat tracing band device. BRIEF DESCRIPTION OF DRAWINGS

[0015] The high-temperature flue gas sampling pipeline heat tracing band device will be further described below in combination with the drawings and embodiments.

[0016] Figure 1 The high-temperature flue gas sampling pipeline heat tracing band device is a structure diagram.

[0017] Figure 2 The high-temperature flue gas sampling pipeline heat tracing band device is a sectional view.

[0018] Figure 3 The high-temperature flue gas sampling pipeline heat tracing band device is a mounting ring structure diagram.

[0019] Figure 4 The high-temperature flue gas sampling pipeline heat tracing band device is a detection box structure diagram.

[0020] LEGEND:

[0021] 1, sheath; 2, mounting ring; 21, filter screen; 3, detection box; 31, connecting ring; 32, display screen; 33, sealing door; 4, PTC heat tracing band; 5, sampling pipe; 6, back flushing pipe; 61, heat buffer layer; 7, fire-retardant filling particles; 8, heat preservation layer; 9, heat reflection film group. DETAILED DESCRIPTION

[0022] This part will describe the specific embodiments of the present application in detail, the preferred embodiments of the present application are shown in the drawings, the role of the drawings is to supplement the description of the text part with graphics, so that people can intuitively and visually understand each technical feature and the overall technical scheme of the present application, but it cannot be understood as a limitation on the protection scope of the present application.

[0023] Referring to Figures 1-4 , the utility model embodiment a high temperature flue gas sampling pipeline heat tracing band device, it includes sheath 1, sheath 1 material is polyethylene (PE) or polyvinyl chloride (PVC) protective outer sleeve composite, sheath 1 one end fixedly connected with mounting ring 2, and the other end fixedly connected with the head, sheath 1 inside is equipped with PTC heat tracing band 4, sampling pipe 5 and back flushing pipe 6, sampling pipe 5 material is corrosion -resistant high performance resin, sampling pipe 5 is used to transport the flue gas of sampling, PTC heat tracing band 4 is located in the middle position of sampling pipe 5 and back flushing pipe 6, sampling pipe 5 has three, and all with PTC heat tracing band 4 contact connection, back flushing pipe 6 outer periphery is equipped with heat buffer layer 61, heat buffer layer 61 is formed by heat -resistant film winding, back flushing pipe 6 with PTC heat tracing band 4 contact connection, back flushing pipe 6 is used to transport back flushing gas, heat buffer layer 61 can slow down the speed of heat transfer, heat buffer layer 61 preferably is formed by heat -resistant film (can be the same material as back flushing pipe 6, also can be mica tape) winding, winding layer and layer exist certain gap between each other;

[0024] PTC heating band 4, sampling tube 5 and back flushing pipe 6 periphery is provided with fire -retardant filling particle 7, fire -retardant filling particle 7 outside is provided with heat reflection film group 9, both sides heat reflection film group 9 between being provided with heat preservation layer 8, in use, sampling tube 5 and back flushing pipe 6 are heated by PTC heating band 4, when back flushing, compressed gas is blown into from the end of back flushing pipe 6 far from sampling head, then reaches sampling probe through back flushing pipe 6 and carries out back flushing, in this process, back flushing pipe 6 is cooled, due to the existence of slow heat layer 61, PTC heating band 4 is cooled less, and sampling tube 5 is located on the other side of PTC heating band 4, and its cooling is smaller, and dew will not appear in it, when back flushing is completed (since the smoke heating sampling tube is as long as dozens of meters, and the back flushing duration is shorter, so when back flushing, the cold compressed gas actually blown in will push out a part of hot gas originally existing in back flushing pipe 6 to sampling probe, so the gas back flushed to sampling probe is relatively hot, and dew will not appear in sampling probe), PTC heating band 4 heating heats slow heat layer 61 and back flushing pipe 6, although back flushing pipe 6 is heated slower due to the existence of slow heat layer 61, but since the back flushing interval is longer, back flushing pipe 6 and the gas in it can be heated to the temperature basically same with sampling tube 5 before the next back flushing is carried out;

[0025] The sheath 1 is threadedly connected with the detection box 3 through the mounting ring 2, the detection box 3 is fixedly connected with a display screen 32 at the front side, a sealing door 33 is hingedly connected to the detection box 3 below the display screen 32, the detection box 3 is provided with a connecting ring 31 matched with the mounting ring 2, a filter screen plate 21 is arranged between the mounting ring 2 and the connecting ring 31, and the back flushing pipe 6 penetrates through the filter screen plate 21, and the output end of the back flushing pipe 6 is located in the detection box 3 and is fixedly connected with a back flushing gas device.

[0026] Working principle: when installing, the device is installed on the detection box 3 through the mounting ring 2 and the connecting ring 31, and then the sampling head is installed at the other end of the device;

[0027] When sampling, the smoke in the sampling tube 5 passes through the filter screen plate 21 to intercept part of the smoke dust mixture, after a period of use, the filter screen plate 21 is taken out from the mounting ring 2, and then the filter screen plate 21 is cleaned, so that the cleanliness of the inside of the detection box 3 is ensured, and the later maintenance is facilitated.

[0028] The above describes the embodiments of the utility model in detail in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by ordinary skilled in the art without departing from the purpose of the utility model.

Claims

1. A high-temperature flue gas sampling pipeline heating device, characterized in that: include: A sheath (1) is provided, wherein one end of the sheath (1) is fixedly connected to a mounting ring (2), and the other end is fixedly connected to a head. A PTC heating belt (4), a sampling tube (5) and a back-blowing tube (6) are provided inside the sheath (1). The PTC heating belt (4) is located in the middle of the sampling tube (5) and the back-blowing tube (6). Flame-retardant filling particles (7) are provided on the periphery of the PTC heating belt (4), the sampling tube (5) and the back-blowing tube (6). A heat-reflecting film group (9) is provided on the outer side of the flame-retardant filling particles (7). An insulation layer (8) is provided between the heat-reflecting film groups (9) on both sides. The sheath (1) is threadedly connected to a detection box (3) through the mounting ring (2). A connecting ring (31) adapted to the mounting ring (2) is provided on the detection box (3). A filter screen plate (21) is provided between the mounting ring (2) and the connecting ring (31). The back-blowing tube (6) passes through the filter screen plate (21).

2. A high-temperature flue gas sampling pipeline heating cable device according to claim 1, characterized in that: There are three sampling tubes (5), and all of them are in contact with and connected to the PTC heating tape (4).

3. A high-temperature flue gas sampling pipeline heating device according to claim 2, characterized in that: A thermal buffer layer (61) is provided on the outer periphery of the back-blowing pipe (6), and the thermal buffer layer (61) is formed by winding a heat-resistant film. The back-blowing pipe (6) is in contact with and connected to the PTC heating tape (4).

4. A high-temperature flue gas sampling pipeline heating cable device according to claim 3, characterized in that: The sheath (1) is made of a composite of polyethylene (PE) or polyvinyl chloride (PVC) protective outer jacket.

5. A high-temperature flue gas sampling pipeline heating cable device according to claim 4, characterized in that: The sampling tube (5) is made of corrosion-resistant high-performance resin.

6. A high-temperature flue gas sampling pipeline heating cable device according to claim 5, characterized in that: A display screen (32) is fixedly connected to the front side of the detection box (3), and a sealing door (33) is hinged on the detection box (3) located below the display screen (32).

7. A high-temperature flue gas sampling pipeline heating cable device according to claim 6, characterized in that: The output end of the back-blowing pipe (6) is located in the detection box (3) and is fixedly connected to the back-blowing gas equipment.

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