Heating device for smoke extraction

Abstract

The utility model discloses a heating device for smoke extraction, which relates to the technical field of smoke detection and comprises a cabinet with a measuring system inside, an air inlet end of the measuring system is connected with a sampling rod, a sampling end of the sampling rod is positioned in an airflow channel of a flue, the sampling rod is positioned in an inner cavity of a thermal insulation pipe, and the thermal insulation pipe is connected with the cabinet. A heating ring is wound on the periphery of the sampling rod, a thermocouple is integrated in the heating ring, the heating ring is connected with an alarm, and the sampling device further comprises a flow blocking unit. According to the device, the periphery of the sampling rod is sleeved with the heating ring, smoke in the inner cavity of the sampling rod is heated, so that moisture particles in the smoke are vaporized to prevent the moisture particles from influencing subsequent smoke concentration measurement, meanwhile, the flow blocking unit is arranged in the sampling rod, the flowing speed of the smoke in the sampling rod can be slowed down, and the smoke concentration measurement accuracy is improved. And the heating time of the flue gas is prolonged, so that moisture particles in the flue gas can be completely vaporized.

Description

Technical Field

[0001] The utility model relates to the technical field of smoke detection, in particular to a smoke extraction and heating device. Background Art

[0002] The main difficulty in measuring smoke dust currently lies in the fact that, due to the associated construction time, construction costs, and operating expenses, nearly all desulfurization systems in China lack GGH for dehydration. This results in high moisture content and low flue gas temperatures (typically below 80°C) in the flue gas at the desulfurization outlet. Optical methods for measuring smoke dust concentrations often mistake moisture particles for smoke dust, as the flue gas already contains water particles. Consequently, traditional methods are unable to measure smoke dust at very low concentrations.

[0003] In summary, a special design is required for the working conditions, otherwise it will lead to a large measurement error and it will be impossible to provide accurate measurement data for the environmental monitoring department. Therefore, this application provides a smoke extraction and heating device to meet the needs. Utility Model Content

[0004] The purpose of the present application is to provide a smoke extraction and heating device to solve the problem of large measurement errors caused by the presence of moisture particles in the smoke in the prior art.

[0005] To achieve the above-mentioned objectives, the present application provides the following technical solutions: a smoke extraction and heating device, comprising a cabinet with a measuring system inside, the air inlet end of the measuring system being connected to a sampling rod, the sampling end of the sampling rod being located in the airflow channel of the flue, the sampling rod being located in the inner cavity of the insulation tube, a heating coil being wrapped around the periphery of the sampling rod, and a thermocouple being integrated inside the heating coil, the heating coil being connected to an alarm, and also comprising a flow blocking unit arranged in the flow channel of the sampling rod and used to reduce the flow velocity of the airflow.

[0006] Preferably, the flow blocking unit includes a plurality of flow blocking tube groups linearly arranged on the top wall of the inner cavity of the sampling rod, the flow blocking tube group includes a plurality of flow blocking tubes arranged in a circumference, and the plurality of flow blocking tubes are all located above the horizontal axis of the sampling rod. The flow blocking tube includes a horizontal transverse tube fixedly connected to the inner wall of the sampling rod, and the horizontal transverse tube is connected to an inclined flow blocking inclined tube through an arc tube, and the flow blocking inclined tube is inclined toward the air inlet end.

[0007] Preferably, the air outlet of the obstructing inclined tube is a narrow opening.

[0008] Preferably, the inclination angle of the flow-blocking inclined tube is set to between 30° and 60°.

[0009] Preferably, one end of the sampling rod is located in the inner cavity of the chassis, and a stud for grounding is installed on the chassis.

[0010] In summary, the technical effects and advantages of the utility model are:

[0011] The utility model has a reasonable structure. The device is provided with a heating ring on the periphery of the sampling rod. By heating the smoke in the inner cavity of the sampling rod, the moisture particles in the smoke are vaporized to prevent the moisture particles from affecting the subsequent smoke concentration measurement. The heat preservation tube is used to prevent excessive heat loss. At the same time, a flow resistance unit is provided inside the sampling rod to slow down the flow speed of the smoke inside the sampling rod and prolong the heating time of the smoke to ensure that the moisture particles in the smoke can be completely vaporized.

[0012] In the utility model, a thermocouple connected to an alarm is provided in the heating coil, the thermocouple is used to measure the temperature, and the alarm is used to receive and analyze the data, and an alarm is issued when the temperature is too high or too low. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0014] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the cross-sectional structure of the insulation pipe and sampling rod of the utility model;

[0016] Figure 3 For this utility model Figure 2 Schematic diagram of the cross-sectional structure of the middle flow resistance unit;

[0017] Figure 4 For this utility model Figure 2 Schematic diagram of the left view of the sampling rod.

[0018] In the figure: 1. Flue; 2. Chassis; 3. Cabinet; 4. Measurement system; 5. Sampling rod; 6. Insulation tube; 7. Flow blocking unit; 71. Horizontal cross tube; 72. Arc tube; 73. Flow blocking inclined tube; 8. Stud; 9. Waterproof joint; 10. Heating coil. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example: Reference Figure 1-2 The device shown is for extracting and heating smoke dust, and includes a cabinet 3 with a measuring system 4 inside. The air inlet end of the measuring system 4 is connected to a sampling rod 5. The sampling end of the sampling rod 5 is located in the air flow channel of the flue 1. The sampling rod 5 is located in the inner cavity of the insulation tube 6. A heating coil 5 is wrapped around the periphery of the sampling rod 5, and a thermocouple is integrated inside the heating coil 5. The heating coil 5 is connected to an alarm and also includes a flow blocking unit 7 arranged in the flow channel of the sampling rod 5 and used to reduce the flow velocity of the airflow.

[0021] This device includes a heating coil 5 wrapped around the periphery of a sampling rod 5. By heating the flue gas within the sampling rod 5, moisture particles in the flue gas are vaporized to prevent them from affecting subsequent smoke concentration measurements. A heat preservation tube 6 prevents excessive heat loss. A flow blocker 7 is also provided within the sampling rod 5 to slow the flow of flue gas within the sampling rod 5, prolonging the heating time of the flue gas and ensuring complete vaporization of moisture particles in the flue gas. A thermocouple connected to an alarm is provided within the heating coil 10. The thermocouple measures temperature, and the alarm receives and analyzes the data. The system automatically detects when the temperature is greater than 300°C or less than 280°C and issues an alarm. (When the temperature is greater than 300°C, the operator is prompted to reduce the voltage applied to the heating coil 10 to lower the heating temperature. When the temperature is less than 280°C, the operator is prompted to increase the voltage applied to the heating coil 10 to ensure a temperature of approximately 300°C to ensure complete vaporization of moisture particles in the flue gas.)

[0022] It should be noted that, first, the heating coil 10 uses nickel-chromium alloy wire as the heat source, which has excellent corrosion resistance, good conductivity and mechanical properties. Second, the heating coil 10 is powered by AC220V and has a power of 1000W, which keeps the working temperature of the sampling rod constant at around 300°C, that is, completely vaporizes the water particles.

[0023] As a preferred implementation in this embodiment, Figure 3 and Figure 4As shown, the flow-blocking unit 7 includes a plurality of flow-blocking tube groups linearly arranged on the top wall of the inner cavity of the sampling rod 5. The flow-blocking tube group includes a plurality of flow-blocking tubes arranged in a circumference. The plurality of flow-blocking tubes are all located above the horizontal axis of the sampling rod 5. The flow-blocking tubes include a horizontal transverse tube 71 fixedly connected to the inner wall of the sampling rod 5. The horizontal transverse tube 71 is connected to an obliquely arranged flow-blocking inclined tube 73 through an arc tube 72. The flow-blocking inclined tube 73 is inclined toward the air inlet end. When the flue gas flows in the inner cavity of the sampling rod 5, the flue gas will enter the horizontal transverse tube 71 and be guided into the flow-blocking inclined tube 73 by the guiding action of the arc tube 72. When the flue gas is ejected from the flow-blocking inclined tube 73, it will collide with the normally flowing flue gas, thereby slowing down the flow of the airflow and prolonging the heat treatment time of the flue gas.

[0024] It should be noted that the provision of the arc tube 72 can reduce the energy loss of the flue gas due to collision in the choke tube.

[0025] As a preferred implementation in this embodiment, Figure 3 As shown, the air outlet of the obstruction inclined pipe 73 is set as a narrow opening. The purpose of the narrow opening is to increase the flow rate of the smoke ejected from the obstruction inclined pipe 73, so as to enhance the obstruction effect on the normal flow of smoke.

[0026] As a preferred implementation in this embodiment, Figure 3 As shown, the inclination angle of the obstruction inclined tube 73 is set to be between 30° and 60°. When the inclination of the obstruction inclined tube 73 is within this range, the obstruction effect is good. When the inclination angle is too small, the obstruction area is too large, and the obstruction collision effect is reduced. When the inclination range is too large, the obstruction area for the flue gas is reduced, the obstruction is uneven, and the obstruction effect is reduced. At the same time, it is easy to cause the horizontally flowing flue gas to enter the interior from the air outlet of the obstruction obstruction inclined tube 73 and collide with the airflow moving outward from the interior, causing airflow energy loss, thereby weakening the obstruction effect of the airflow ejected from the obstruction obstruction inclined tube 73 on the normally flowing flue gas.

[0027] As a preferred implementation in this embodiment, Figure 3 As shown, one end of the sampling rod 5 is located in the inner cavity of the chassis 2, and a stud 8 for grounding is installed on the chassis 2 for protective grounding to prevent electric shock in the event of leakage.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A smoke extraction and heating device, comprising a cabinet (3) with a measuring system (4) inside, wherein the air inlet end of the measuring system (4) is connected to a sampling rod (5), and the sampling end of the sampling rod (5) is located in the air flow channel of the flue (1), characterized in that: The sampling rod (5) is located in the inner cavity of the heat preservation tube (6); a heating coil (10) is wound around the periphery of the sampling rod (5); a thermocouple is integrated inside the heating coil (10); the heating coil (10) is connected to an alarm; and further comprises a flow blocking unit (7) arranged in the flow channel of the sampling rod (5) and used to reduce the flow velocity of the airflow.

2. The smoke extraction and heating device according to claim 1, characterized in that: The flow blocking unit (7) comprises a plurality of flow blocking tube groups arranged linearly on the top wall of the inner cavity of the sampling rod (5), the flow blocking tube group comprising a plurality of flow blocking tubes arranged in a circumferential manner, the plurality of flow blocking tubes being located above the horizontal axis of the sampling rod (5), the flow blocking tube comprising a horizontal transverse tube (71) fixedly connected to the inner wall of the sampling rod (5), and the horizontal transverse tube (71) being connected to an inclined flow blocking inclined tube (73) via an arc tube (72), and the flow blocking inclined tube (73) being inclined toward the air inlet end.

3. The smoke extraction and heating device according to claim 2, characterized in that: The air outlet of the obstructing inclined tube (73) is arranged as a narrow opening.

4. The smoke extraction and heating device according to claim 2, characterized in that: The inclination angle of the flow-blocking inclined tube (73) is set to be between 30° and 60°.

5. The smoke extraction and heating device according to claim 1, characterized in that: One end of the sampling rod (5) is located in the inner cavity of the chassis (2), and a stud (8) for grounding is installed on the chassis (2).

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