Online detection device for ammonia escape

Abstract

The utility model provides an ammonia escape on-line detection device, which comprises a cable and a detection main body of an inverted T-shaped structure, the upper end of the detection main body is arranged in a full-fillet manner, the cable penetrates through the axis of the full-fillet, a hub motor is arranged in the detection main body, and the hub motor is connected with the detection main body. Motor shafts extending out of the two ends of the hub motor are fixedly connected with the inner wall of the detection body, a tensioning wheel is arranged below the hub motor, a cable is tightly attached to the side wall of the hub motor under buckling of the tensioning wheel, an air channel is formed in the detection body in the vertical direction, and the middle of the air channel is bundled to be of a narrow channel structure. A transverse plate is fixedly connected to the middle of the narrow channel structure, a plurality of sensor modules are fixedly connected to the side wall of the transverse plate, an infrared emission module is fixedly connected to the inner wall of the lower portion of the detection body, and an infrared receiving module is arranged right opposite to the infrared emission module. A traditional detection mode is abandoned, and the detection range is expanded.

Description

Technical Field

[0001] The present invention relates to the technical field of ammonia detection, and in particular to an online detection device for ammonia escape. Background Art

[0002] The combination of low-nitrogen combustion technology and selective catalytic reduction (SCR) flue gas denitrification technology is a common technical means for controlling the emission of nitrogen oxides (NOX) in existing waste gas treatment. Among them, SCR denitrification technology is the key to ensuring that flue gas NOX emissions meet the standards. SCR technology uses ammonia water as a reducing agent. In order to ensure that NOX emissions do not exceed the standards, factories often add excessive ammonia water during the denitrification process, resulting in excess ammonia in the flue gas. This phenomenon is called ammonia slip.

[0003] The existing ammonia detection devices basically adopt a fixed method. That is, the ammonia detection module is installed at a designated detection point. However, this detection method can only detect the air at that point, so the detection range is limited. To expand the detection range, it is necessary to add more detection modules. At the same time, the molecular mass of ammonia is smaller than the average molecular mass of air, so ammonia is easy to float, so the position of the detection point of the detection module also needs to be considered. Summary of the invention

[0004] In order to solve the above problems, the present invention discloses an online detection device for ammonia escape, including a cable and a detection body in an inverted T-shaped structure, the upper end of the detection body is fully rounded, and the cable passes through the axis of the full rounded corner, the detection body is provided with a hub motor inside, the motor shafts extending from both ends of the hub motor are fixedly connected to the inner wall of the detection body, and the cable passes through the bottom of the hub motor, and a tensioning wheel is provided under the hub motor. Under the pressure of the tensioning wheel, the cable is tightly attached to the side wall of the hub motor. Starting the hub motor can realize the movement of the detection body on the cable to change the detection position. Compared with the traditional fixed-point installation vertex detection method, this solution has the characteristics of large detection range and flexible detection.

[0005] The interior of the detection body is provided with an air duct in the vertical direction, and the middle part of the air duct converges into a narrow channel structure, the upper part of the narrow channel structure is fixedly connected with a fan, the middle part of the narrow channel structure is fixedly connected with a horizontal plate, the side wall of the horizontal plate is fixedly connected with a number of sensor modules, the lower inner wall of the detection body is fixedly connected with an infrared transmitting module, and an infrared receiving module is arranged directly opposite to the infrared transmitting module. Two detection methods are used to verify each other and improve the accuracy of detection.

[0006] The rotating shafts extending from both ends of the tensioning wheel are fixedly connected with U-shaped spring pieces, and both ends of the U-shaped spring pieces are fixedly connected to the upper inner wall of the air duct. After the U-shaped spring piece is installed, the middle part thereof has a tendency to release elastic potential energy upward, that is, the tensioning wheel is driven by the U-shaped spring piece to move upward against the hub motor, thereby clamping the cable between the tensioning wheel and the hub motor.

[0007] Guide wheels are arranged on both sides of the upper part of the detection body, and the cable passes through the bottom of the guide wheels to provide support and avoid contact between the cable and the detection body.

[0008] A circuit board chamber is provided on one side of the middle part of the detection body, an antenna is provided on the side wall of the detection body in the vertical direction, and a battery compartment is provided on the other side of the middle part of the detection body, which is the power supply and circuit placement area of ​​the detection body. An antenna is also provided to maintain a signal connection with the host computer, thereby further realizing real-time transmission of data of the detection body.

[0009] An air inlet opening is provided at the lower end of the detection body, and a filter is provided at the opening. An air outlet is provided on the upper side wall of the detection body, that is, the air entering from the opening passes through the air duct and is finally sent out from the air outlet. The air inlet is a rectangular opening, which is conducive to intercepting the rising ammonia gas.

[0010] The device also includes two fixing parts, the upper and lower parts of which are respectively provided with fixing holes, one end of the cable is fixedly connected to the upper part of the fixing part, and when the device is in use, the area to be detected is planned in advance, the distribution of the cables is arranged, and finally the installation position of the fixing part is determined.

[0011] A charging plug is disposed on the side wall of one of the fixing members, and a charging port is disposed on the side wall of the detection body for charging the device. Meanwhile, the charging plug is in a cone shape, which facilitates the insertion of the charging plug into the charging hole.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. A cable is provided, and the detection subject can be moved on the cable. Compared with the fixed-point installation detection method, it has a large detection range and the detection position can be flexibly moved.

[0014] 2. The air inlet opening of the device is located at the bottom. Considering the fact that ammonia easily floats up, the air inlet opening at the bottom makes it easier to detect ammonia.

[0015] 3. Two detection modes are set up to improve the accuracy of detection. At the same time, wireless communication is used to facilitate data transmission. There is no need to arrange communication cables and connect the detection subject, making installation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is an overall stereogram of the present invention;

[0017] Figure 2 It is a perspective schematic diagram of the detection subject of the present invention;

[0018] Figure 3 It is a bottom schematic diagram of the detection body of the present invention;

[0019] Figure 4 It is a three-dimensional schematic diagram of the transmission structure of the present invention;

[0020] Figure 5 for Figure 1 Enlarged view of point A in the middle.

[0021] List of reference numerals:

[0022] 1. Fixing parts; 2. Cable; 3. Detection subject;

[0023] 11. Fixing hole; 12. Charging plug; 31. Infrared transmitting module; 32. Air duct; 33. Battery compartment; 34. Charging port; 35. U-shaped spring; 36. Air outlet; 37. Guide wheel; 38. Hub motor; 39. Tensioning wheel; 310. Fan; 311. Circuit board chamber; 312. Horizontal plate; 313. Antenna; 314. Sensor module; 315. Filter; 316. Infrared receiving module. DETAILED DESCRIPTION

[0024] The present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the accompanying drawings, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively. Example

[0025] according to Figure 1 , Figure 2 and Figure 4As shown, an online detection device for ammonia escape includes a cable 2 and a detection body 3 in an inverted T-shaped structure. The cross-sectional shape of the cable 2 in the figure is circular. In addition, the cable 2 can be changed to a belt shape. The upper end of the detection body 3 is set with a full rounded corner, and the cable 2 passes through the axis of the full rounded corner. A hub motor 38 is arranged inside the detection body 3. The motor shafts extending at both ends of the hub motor 38 are fixedly connected to the inner wall of the detection body 3. The name of the hub motor 38 is used here only to facilitate understanding of the working mode of the motor. Specifically, when the hub motor 38 is powered on, since the motor shafts at both ends are fixed, the motor housing of the hub motor 38 rotates relatively, and the cable 2 passes through the bottom of the hub motor 38. A tensioning wheel 39 is arranged below the hub motor 38. Under the buckling of the tensioning wheel 39, the cable 2 is close to the side wall of the hub motor 38. The setting of the tensioning wheel 39 is used to increase the friction between the cable 2 and the hub motor 38 to avoid slipping, which makes the detection body 3 unable to move.

[0026] Furthermore, convex rings are provided on both side walls of the housing of the hub motor 38 , and this arrangement is to prevent the cable 2 from slipping off the edges of both sides of the hub motor 38 .

[0027] Combination Figure 2 and Figure 3 As shown, the interior of the detection body 3 is provided with an air duct 32 in the up-down direction, and the middle part of the air duct 32 converges into a narrow channel structure, and its plane structure is similar to the outline schematic diagram of an hourglass or a gourd, and a fan 310 is fixedly connected to the upper part of the narrow channel structure. When the fan 310 is started, air is sent upward, that is, negative pressure is generated at the bottom, and air is inhaled. A horizontal plate 312 is fixedly connected to the middle part of the narrow channel structure, and a number of sensor modules 314 are fixedly connected to the side walls of the horizontal plate 312. Here, a semiconductor for detection is arranged in the sensor module 314, and ammonia reacts chemically on the semiconductor to change the electrical properties of the semiconductor, thereby detecting The concentration of ammonia in the air can be measured and calculated. It is sufficient to detect ammonia here, so the selection of the sensor module 314 will not be described in detail. The lower inner wall of the detection body 3 is fixedly connected with an infrared transmitting module 31, and an infrared receiving module 316 is arranged directly opposite the infrared transmitting module 31, that is, the infrared transmitting module 31 irradiates the infrared receiving module 316. Since ammonia has a characteristic absorption peak in the near-infrared band, the infrared light intensity of the infrared receiving module 316 is calculated here to determine the concentration of ammonia. Similarly, the selection of the infrared transmitting module 31 and the infrared receiving module 316 will not be described here.

[0028] The rotating shaft extending from both ends of the tensioning wheel 39 is fixedly connected with a U-shaped spring piece 35, and both ends of the U-shaped spring piece 35 are fixedly connected to the upper inner wall of the air duct 32. From the figure, the U-shaped spring piece 35 is installed inverted here, and after the installation is completed, the middle part of the U-shaped spring piece 35 has an upward elastic deformation tendency, that is, the tensioning wheel 39 fixed in the middle part of the U-shaped spring piece 35 has an upward movement tendency, and after the cable 2 passes between the tensioning wheel 39 and the hub motor 38, the tensioning wheel 39 presses the cable 2 under the action of the U-shaped spring piece 35.

[0029] Guide wheels 37 are provided on both sides of the upper part of the detection body 3. The cable 2 passes through the bottom of the guide wheels 37. The position of the guide wheels 37 is higher than the hub motor 38. The provision of the guide wheels 37 not only reduces the force on the hub motor 38, but also avoids contact between the cable 2 and the shell of the detection body 3.

[0030] A circuit board chamber 311 is provided on one side of the middle part of the detection body 3 for installing a circuit board, a driving board, etc. for detection. An antenna 313 is provided on the side wall of the detection body 3 in the vertical direction for realizing wireless communication with a host computer and sending the detection data. A battery compartment 33 is provided on the other side of the middle part of the detection body 3. Batteries are placed in the battery compartment 33 for powering the device.

[0031] Combination Figure 2 and Figure 3 As shown, an air inlet opening is provided at the lower end of the detection body 3, and the opening is rectangular, which is conducive to collecting the rising ammonia gas, and a filter 315 is provided at the opening to reduce the entry of dust. An air outlet 36 is provided on the upper side wall of the detection body 3, that is, the air entering from the opening passes through the air duct 32 and is finally sent out from the air outlet 36. Furthermore, an infrared transmitting module 31 and an infrared receiving module 316 are arranged in the opening and are located above the filter 315.

[0032] The device also includes two fixing members 1, which are in the shape of strips. Fixing holes 11 are respectively provided on the upper and lower parts of the fixing members 1. Fixing members, such as fixing bolts, can be used to pass through the fixing holes 11 to fix the fixing members 1 to the support. One end of the cable 2 is fixedly connected to the upper part of the fixing member 1. The fixing of the fixing member 1 is used to fix the cable 2, and the distribution of the cable 2 needs to determine the detection range.

[0033] A charging plug 12 is disposed on the side wall of one of the fixing members 1, and a charging port 34 is disposed on the side wall of the detection body 3. The charging plug 12 and the charging port 34 cooperate to supply power to the battery in the battery compartment 33. The charging plug 12 is a cone, which facilitates the insertion of the charging plug 12 into the charging port 34. In addition, a cable for the charging port 34 is also disposed on the fixing member 1 with the charging plug 12, which is not shown in the figure. Example

[0034] The difference between this embodiment and the first embodiment is that two detection bodies 3 are mounted on the cable 2, and the fixing parts 1 for fixing the cable 2 are all provided with charging plugs 12, that is, the two detection bodies 3 can be charged at the same time.

[0035] The above scheme has the following advantages: 1. When one detection body 3 is charging, the other detection body 3 can perform inspections normally, that is, uninterrupted detection is achieved; 2. When the two detection bodies 3 work at the same time, their respective continuous detection areas can be planned. Compared with the entire detection area, the continuous detection area is smaller, thereby increasing the frequency of detection; 3. When two detection bodies 3 are set up, one of them can be used as a redundant backup.

[0036] The technical means disclosed in the scheme of the present invention are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical schemes composed of any combination of the above technical features.

Claims

1. An online detection device for ammonia escape, characterized in that: It comprises a cable (2) and a detection body (3) in an inverted T-shaped structure, the upper end of the detection body (3) is arranged with a full rounded corner, and the cable (2) passes through the axis of the full rounded corner, a wheel hub motor (38) is arranged inside the detection body (3), the motor shafts extending from both ends of the wheel hub motor (38) are fixedly connected to the inner wall of the detection body (3), and the cable (2) passes through the bottom of the wheel hub motor (38), and a tensioning wheel (39) is arranged below the wheel hub motor (38), and under the buckling of the tensioning wheel (39), the cable (2) is closely attached to the side wall of the wheel hub motor (38); An air duct (32) is arranged in the vertical direction inside the detection body (3), and the middle part of the air duct (32) converges to form a narrow channel structure, a fan (310) is fixedly connected to the upper part of the narrow channel structure, a horizontal plate (312) is fixedly connected to the middle part of the narrow channel structure, a plurality of sensor modules (314) are fixedly connected to the side wall of the horizontal plate (312), an infrared transmitting module (31) is fixedly connected to the lower inner wall of the detection body (3), and an infrared receiving module (316) is arranged directly opposite to the infrared transmitting module (31).

2. The on-line detection device for ammonia escape according to claim 1, characterized in that: The rotating shafts extending from both ends of the tension wheel (39) are fixedly connected to U-shaped spring pieces (35), and both ends of the U-shaped spring pieces (35) are fixedly connected to the upper inner wall of the air duct (32).

3. The online detection device for ammonia escape according to claim 1, characterized in that: Guide wheels (37) are provided on both sides of the upper part of the detection body (3), and the cable (2) passes under the guide wheels (37).

4. The online detection device for ammonia escape according to claim 1, characterized in that: A circuit board chamber (311) is provided on one side of the middle of the detection body (3), an antenna (313) is provided on the side wall of the detection body (3) in a vertical direction, and a battery compartment (33) is provided on the other side of the middle of the detection body (3).

5. The online detection device for ammonia escape according to claim 1, characterized in that: The lower end of the detection body (3) is provided with an air inlet opening, and a filter (315) is provided at the opening, and the upper side wall of the detection body (3) is provided with an air outlet hole (36), that is, the air entering from the opening passes through the air duct (32) and is finally sent out from the air outlet hole (36).

6. The online detection device for ammonia escape according to claim 1, characterized in that: The device also comprises two fixing members (1), the upper and lower parts of the fixing members (1) are respectively provided with fixing holes (11), and one end of the cable (2) is fixedly connected to the upper part of the fixing member (1).

7. The online detection device for ammonia escape according to claim 6, characterized in that: A charging plug (12) is provided on a side wall of one of the fixing members (1), and a charging port (34) is provided on a side wall of the detection body (3).

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