Straight combustion engine tail gas detection alarm device

Abstract

The utility model provides a kind of direct combustion engine tail gas detection alarm device, belong to tail gas detection device field, including installation box, detection alarm component and filter component;The utility model: non-dispersive infrared sensor, ultraviolet differential absorption spectroscopy sensor and catalytic combustion sensor bottom are connected with the sampling connection pipe of installation box bottom, sampling connection pipe is communicated with gas collection bag by inlet branch pipe, so that emission gas contacts sensor, non-dispersive infrared sensor is used to detect CO, CO2 Concentration, realizes high-precision measurement by specific wavelength infrared absorption characteristic, ultraviolet differential absorption spectroscopy sensor is used to detect NO, NO2 Concentration, utilizes gas molecule narrowband absorption characteristic to realize ppm grade detection, catalytic combustion sensor is used to detect flammable gas explosion lower limit concentration, can accurately detect different components in emission gas, when the value in detection data exceeds set value, audible and visual alarm issues alarm, to remind personnel to respond.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas detection devices, specifically an exhaust gas detection and alarm device for direct-fired engines. Background Technology

[0002] A direct-fired gas turbine is a machine that uses the direct combustion of combustible gas to provide cooling, heating, and domestic hot water. Direct-fired turbines use fuels such as natural gas and diesel as their energy source, with most widely used ones using natural gas. A direct-fired turbine includes a high-temperature generator, a low-temperature generator, a high-temperature exchanger, a low-temperature exchanger, an evaporator, and a condenser. During operation, a direct-fired turbine produces exhaust gas containing CO, NOx, and unburned hydrocarbons. If the concentration exceeds the standard, it may cause explosions, poisoning, or environmental pollution accidents. Existing exhaust gas detection equipment has the following drawbacks: traditional equipment often uses a single electrochemical sensor, making it difficult to simultaneously detect CO, NOx, and combustible gases, leading to missed or false alarms. This makes it impossible to accurately detect the composition of the exhaust gas emitted by the direct-fired turbine. Furthermore, during detection, the exhaust gas directly contacts the sensor, causing particles to adhere to the sensor head and cause blockage, reducing detection accuracy. Summary of the Invention

[0003] The purpose of this invention is to provide a direct-fired engine exhaust gas detection and alarm device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a direct-fired engine exhaust gas detection and alarm device, comprising a mounting box, a detection and alarm component, and a filter component; Wherein: the surface of the mounting box is hinged with a cover plate, and the interior of the mounting box is equipped with a PLC controller; The detection alarm component includes a mounting bracket fixedly installed inside a mounting box. A non-dispersive infrared sensor is fixedly mounted on the surface of the mounting bracket. An ultraviolet differential absorption spectroscopy sensor is fixedly mounted on one side of the non-dispersive infrared sensor. A catalytic combustion sensor is mounted on one side of the ultraviolet differential absorption spectroscopy sensor. Several sampling pipes are fixedly connected to the bottom of the mounting box. The bottoms of the non-dispersive infrared sensor, the ultraviolet differential absorption spectroscopy sensor, and the catalytic combustion sensor are all connected to their respective bottom sampling pipes. An air inlet manifold is connected to the bottom of each sampling pipe. A gas collection bag is installed at the bottom of the air inlet manifold. An audible and visual alarm is installed on the top of the mounting box. The filter assembly includes a mounting box located at the bottom of the mounting housing. A coarse filter screen is installed at the front end of the interior of the mounting box, and a fine filter screen is installed behind the coarse filter screen. A sealing cover is installed on the surface of the mounting box, and an air intake main pipe is installed on one side of the sealing cover. The bottom of the mounting box is connected to an air collection manifold.

[0005] As a preferred embodiment of this utility model: ventilation holes are provided on both sides of the mounting box, a fan is fixedly installed inside the ventilation hole, and a protective net is installed outside the fan.

[0006] As a preferred embodiment of this utility model: several connection terminals are fixedly installed on the bottom of the PLC controller, and the tops of the non-dispersive infrared sensor, the ultraviolet differential absorption spectroscopy sensor and the catalytic combustion sensor are all connected to the connection terminals via connection lines.

[0007] As a preferred embodiment of this utility model: a fixed bracket is fixedly installed on the back of the mounting box, and the fixed bracket has fixing holes at both ends.

[0008] As a preferred embodiment of this utility model, expansion interfaces are provided at the top of the gas collection bag and the bottom of the mounting box.

[0009] As a preferred embodiment of this utility model, the surface of the cover plate is provided with a transparent window corresponding to the PLC controller.

[0010] Compared with the prior art, the beneficial effects of this utility model are: (1) A non-dispersive infrared sensor, an ultraviolet differential absorption spectroscopy sensor and a catalytic combustion sensor are installed side by side on the surface of the mounting bracket. The bottom of the above sensors is connected to the sampling pipe at the bottom of the mounting box. The sampling pipe is connected to the gas collection bag through the gas inlet pipe so that the exhaust gas comes into contact with the sensor. The non-dispersive infrared sensor is used to detect CO and CO2 concentrations and achieves high-precision measurement through the infrared absorption characteristics of specific wavelengths. The ultraviolet differential absorption spectroscopy sensor is used to detect NO and NO2 concentrations and achieves ppm-level detection by utilizing the narrow-band absorption characteristics of gas molecules. The catalytic combustion sensor is used to detect the lower explosive limit concentration of combustible gas and can accurately detect different components in the exhaust gas. When the value in the detection data exceeds the set value, the audible and visual alarm will sound an alarm to remind personnel to take action. (2) An installation box is installed at the bottom of the installation box. The installation box is covered with a sealing cover. The exhaust gas enters the installation box through the air intake pipe on one side of the sealing cover. A coarse filter screen is installed at the front end of the installation box. The coarse filter screen can filter larger particles in the exhaust gas. The filtered exhaust gas is filtered again by a fine filter screen, which further reduces the content of fine particulate impurities. The double-layer filter screen can intercept dust particles and prevent the sensor from clogging. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the detection and alarm component structure of this utility model; Figure 3This is a schematic diagram of the filter assembly structure of this utility model; Figure 4 This is a schematic diagram of the fan mounting structure of this utility model.

[0012] In the diagram: 1. Mounting box; 2. Cover plate; 3. PLC controller; 4. Detection and alarm components; 41. Mounting bracket; 42. Non-dispersive infrared sensor; 43. Ultraviolet differential absorption spectroscopy sensor; 44. Catalytic combustion sensor; 45. Sampling connector; 46. Inlet manifold; 47. Gas collection manifold; 48. Audible and visual alarm; 5. Filter assembly; 51. Mounting box; 52. Coarse filter; 53. Fine filter; 54. Sealing cap; 55. Main intake pipe; 6. Ventilation vents; 7. Fan; 8. Protective mesh; 9. Connecting terminals; 10. Fixed stand; 11. Fixing hole; 12. Expansion interface; 13. Transparent window. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0014] Please see Figure 1 - Figure 4 A direct-fired engine exhaust gas detection and alarm device includes: a mounting box 1, a detection and alarm component 4, and a filter component 5; The surface of the mounting box 1 is hinged with a cover plate 2, and the interior of the mounting box 1 is equipped with a PLC controller 3; Please see Figure 1 , Figure 2 The detection alarm component 4 includes a mounting bracket 41 fixedly installed inside the mounting box 1. A non-dispersive infrared sensor 42 is fixedly installed on the surface of the mounting bracket 41. An ultraviolet differential absorption spectroscopy sensor 43 is fixedly installed on one side of the non-dispersive infrared sensor 42. A catalytic combustion sensor 44 is installed on one side of the ultraviolet differential absorption spectroscopy sensor 43. Several sampling pipes 45 are fixedly connected to the bottom of the mounting box 1. The bottoms of the non-dispersive infrared sensor 42, the ultraviolet differential absorption spectroscopy sensor 43, and the catalytic combustion sensor 44 are all connected to the corresponding sampling pipes 45 at their bottoms. An air inlet manifold 46 is connected to the bottom of the sampling pipe 45. An air collection manifold 47 is installed at the bottom of the air inlet manifold 46. An audible and visual alarm 48 is installed on the top of the mounting box 1.

[0015] In practical use: A non-dispersive infrared sensor 42, an ultraviolet differential absorption spectroscopy sensor 43, and a catalytic combustion sensor 44 are installed side by side on the surface of the mounting bracket 41. The bottom of the sensors is connected to the sampling pipe 45 at the bottom of the mounting box 1. The sampling pipe 45 is connected to the gas collection bag 47 through the gas inlet pipe 46, so that the exhaust gas comes into contact with the sensor. The non-dispersive infrared sensor 42 is used to detect the concentration of CO and CO2, and achieves high-precision measurement through the infrared absorption characteristics of specific wavelengths. The ultraviolet differential absorption spectroscopy sensor 43 is used to detect the concentration of NO and NO2, and achieves ppm-level detection by utilizing the narrow-band absorption characteristics of gas molecules. The catalytic combustion sensor 44 is used to detect the lower explosive limit concentration of combustible gas, and can accurately detect different components in the exhaust gas. When the value in the detected data exceeds the set value, the audible and visual alarm 48 sounds an alarm to remind personnel to take action.

[0016] Please see Figure 1 , Figure 3 The filter assembly 5 includes an installation box 51 located at the bottom of the installation box 1. A coarse filter 52 is installed at the front end of the interior of the installation box 51, and a fine filter 53 is installed behind the coarse filter 52. A sealing cover 54 is installed on the surface of the installation box 51, and an air intake pipe 55 is installed on one side of the sealing cover 54. The bottom of the installation box 51 is connected to the air collection manifold 47.

[0017] In practical use: The bottom of the installation box 1 is equipped with an installation box 51, and the surface of the installation box 51 is equipped with a sealing cover 54. The exhaust gas enters the installation box 51 through the intake pipe 55 on one side of the sealing cover 54. The front end of the interior of the installation box 51 is equipped with a coarse filter 52, which can filter larger particles in the exhaust gas. The filtered exhaust gas is then filtered again by a fine filter 53, which reduces the content of fine particulate impurities. The double-layer filter can intercept dust particles and prevent the sensor from clogging.

[0018] Please see Figure 4 Ventilation holes 6 are provided on both sides of the installation box 1. A fan 7 is fixedly installed inside the ventilation hole 6, and a protective net 8 is installed outside the fan 7.

[0019] In practical use: ventilation holes 6 are opened on both sides of the mounting box 1. A fan 7 is fixedly installed inside the ventilation hole 6. The rotation of the fan 7 causes the external airflow to exchange with the airflow inside the mounting box 1, which has a cooling effect. The protective net 8 installed on the outside of the fan 7 protects the fan 7.

[0020] Please see Figure 2The bottom of the PLC controller 3 is fixedly equipped with several connection terminals 9. The tops of the non-dispersive infrared sensor 42, the ultraviolet differential absorption spectroscopy sensor 43, and the catalytic combustion sensor 44 are all connected to the connection terminals 9 via connecting wires.

[0021] In practical use: The bottom of the PLC controller 3 is equipped with several connection terminals 9. The non-dispersive infrared sensor 42, the ultraviolet differential absorption spectroscopy sensor 43 and the catalytic combustion sensor 44 are connected to the connection terminals 9 through the connection wires on the top, so as to facilitate the transmission of detection data to the PLC controller 3.

[0022] Please see Figure 4 A fixed bracket 10 is fixedly installed on the back of the mounting box 1, and a fixing hole 11 is provided at both ends of the fixed bracket 10.

[0023] In actual use: The back of the mounting box 1 is fixedly mounted with a fixed bracket 10, which is installed through the fixing holes 11 on both sides.

[0024] Please see Figure 3 Both the top of the air collection bag 47 and the bottom of the mounting box 1 are provided with expansion interfaces 12.

[0025] In practical use: both the top of the gas collection bag 47 and the bottom of the mounting box 1 are provided with expansion interfaces 12, which facilitates the installation of corresponding testing equipment according to testing requirements.

[0026] Please see Figure 1 The surface of the cover plate 2 is provided with a transparent window 13 corresponding to the PLC controller 3.

[0027] In practical use: a transparent window 13 is provided on the surface of the cover plate 2 to facilitate observation of the working status of the PLC controller 3.

[0028] A non-dispersive infrared sensor 42, an ultraviolet differential absorption spectroscopy sensor 43, and a catalytic combustion sensor 44 are installed side-by-side on the surface of the mounting bracket 41. The bottom of each sensor is connected to a sampling pipe 45 at the bottom of the mounting box 1. The sampling pipe 45 is connected to a gas collection bag 47 via an inlet pipe 46, allowing the exhaust gas to come into contact with the sensor. The non-dispersive infrared sensor 42 is used to detect CO and CO2 concentrations, achieving high-precision measurement through the infrared absorption characteristics of a specific wavelength. The ultraviolet differential absorption spectroscopy sensor 43 is used to detect NO and NO2 concentrations, achieving ppm-level detection by utilizing the narrow-band absorption characteristics of gas molecules. The catalytic combustion sensor 44 is used to detect the lower explosive limit concentration of combustible gases, accurately detecting different components in the exhaust gas. When the detected values ​​exceed the set values, an audible and visual alarm 48 sounds an alarm to alert personnel to take appropriate action.

[0029] The contents not described in detail in this description are existing technologies known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A direct-fired engine exhaust gas detection and alarm device, characterized in that, include: Mounting box (1), the surface of which is hinged to a cover plate (2), and a PLC controller (3) is installed inside the mounting box (1); The detection alarm component (4) includes a mounting bracket (41) fixedly installed inside the mounting box (1). A non-dispersive infrared sensor (42) is fixedly installed on the surface of the mounting bracket (41). An ultraviolet differential absorption spectroscopy sensor (43) is fixedly installed on one side of the non-dispersive infrared sensor (42). A catalytic combustion sensor (44) is installed on one side of the ultraviolet differential absorption spectroscopy sensor (43). Several sampling pipes (45) are fixedly connected to the bottom of the mounting box (1). The bottoms of the non-dispersive infrared sensor (42), the ultraviolet differential absorption spectroscopy sensor (43), and the catalytic combustion sensor (44) are all connected to the corresponding sampling pipes (45) at their bottoms. An air inlet manifold (46) is connected to the bottom of the sampling pipe (45). A gas collection bag (47) is installed at the bottom of the air inlet manifold (46). An audible and visual alarm (48) is installed on the top of the mounting box (1). The filter assembly (5) includes a mounting box (51) located at the bottom of the mounting box (1). A coarse filter screen (52) is installed at the front end of the mounting box (51), and a fine filter screen (53) is installed behind the coarse filter screen (52). A sealing cover (54) is installed on the surface of the mounting box (51), and an air intake pipe (55) is installed on one side of the sealing cover (54). The bottom of the mounting box (51) is connected to the air collection bag (47).

2. The direct-fired engine exhaust gas detection and alarm device according to claim 1, characterized in that: Ventilation holes (6) are provided on both sides of the mounting box (1). A fan (7) is fixedly installed inside the ventilation hole (6), and a protective net (8) is installed on the outside of the fan (7).

3. The direct-fired engine exhaust gas detection and alarm device according to claim 1, characterized in that: The bottom of the PLC controller (3) is fixedly equipped with several connection terminals (9), and the tops of the non-dispersive infrared sensor (42), the ultraviolet differential absorption spectroscopy sensor (43) and the catalytic combustion sensor (44) are all connected to the connection terminals (9) via connection lines.

4. The direct-fired engine exhaust gas detection and alarm device according to claim 1, characterized in that: The mounting box (1) is fixedly mounted on the back of a fixed bracket (10), and the fixed bracket (10) has fixing holes (11) at both ends.

5. The direct-fired engine exhaust gas detection and alarm device according to claim 1, characterized in that: Both the top of the gas collection bag (47) and the bottom of the mounting box (1) are provided with expansion interfaces (12).

6. The direct-fired engine exhaust gas detection and alarm device according to claim 1, characterized in that: The surface of the cover plate (2) is provided with a transparent window (13) corresponding to the PLC controller (3).

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