Rapid indicator for ammonia spraying amount

Abstract

The utility model relates to the technical field of flue gas flow detection equipment, in particular to a rapid ammonia spraying amount indicator which comprises an acquisition unit and a display unit, the acquisition unit comprises a gas inlet pipe and a gas outlet pipe, an orifice plate flowmeter is arranged between the gas inlet pipe and the gas outlet pipe, the display unit comprises a pressure difference display pipe, and pressure difference display liquid is arranged in the pressure difference display pipe. The communicating pipes are arranged between the pressure difference display pipe and the air inlet pipe and between the pressure difference display pipe and the air outlet pipe, pressure values in the pipeline are collected after the collecting unit is connected with the air inlet pipe and the air outlet pipe, then the collected pressure values are displayed through the display unit, and compared with a conventional structure, the structure is simple, and the pressure difference value can be conveniently observed; the detection elements do not need to be frequently cleaned, calibrated and maintained in the later maintenance process, the display unit is used for replacing a conventional numerical value display screen, the cost is low, damage is not prone to occurring, and the equipment investment cost can be effectively saved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas flow detection equipment technical field, concretely relates to a kind of quick indicating instrument of ammonia injection amount. BACKGROUND

[0002] The ammonia injection grid is damaged in the pipeline and nozzle inside the flue, and the nozzle is blocked, which will have a significant impact on the precise ammonia injection control system, and even make the control system fail, therefore, the state of the ammonia injection grid is intact, which is one of the most critical factors for the normal operation of the denitration precise ammonia injection control system,

[0003] However, during the long-term operation of the denitration system, the ammonia injection pipeline and nozzle inside the flue are easily eroded and worn out due to the high-speed flue gas and high-concentration smoke, and the nozzle is easily blocked by the smoke (the flue gas flow rate is generally 6-10 m / s, and the smoke concentration is about 30-40 g / Nm3).

[0004] The conventional ammonia injection grid using the SCR denitration process is composed of multiple ammonia injection branch pipes, each ammonia injection grid is composed of 2-4 ammonia injection branch pipes, and is used to control the ammonia injection amount at different positions; generally, each ammonia injection branch pipe is provided with 4-6 nozzles, and when the ammonia injection pipeline and nozzle inside the flue are damaged due to the smoke erosion, the ammonia flow of the ammonia injection branch pipe increases sharply, resulting in excessive ammonia injection in the region; when the nozzle is blocked by the smoke, the ammonia flow of the ammonia injection branch pipe abnormally decreases, causing insufficient ammonia injection in the region. Therefore, by detecting the ammonia flow of each ammonia injection branch pipe, it can be quickly identified whether the ammonia injection pipeline and nozzle inside the flue are in good operating condition.

[0005] At present, most of the ammonia flows of the ammonia injection branch pipes are detected by differential pressure flowmeters, but due to the influence of complex site conditions such as corrosion of medium gas, temperature and pressure fluctuation, even if the detection elements of the flowmeter are frequently cleaned, calibrated and maintained, the detection accuracy and stability of the flowmeter still cannot meet the site requirements. UTILITY MODEL CONTENTS

[0006] In order to solve the above problems, the utility model embodiment provides a kind of quick indicating instrument of ammonia injection amount, which is convenient to observe flow difference and is convenient for later maintenance.

[0007] In order to achieve the above purpose, the utility model embodiment specifically adopts the following technical scheme: a kind of quick indicating instrument of ammonia injection amount, including acquisition unit and display unit, the acquisition unit includes inlet pipe and outlet pipe, differential flowmeter is arranged between the inlet pipe and outlet pipe, the display unit includes differential pressure display tube, differential pressure display liquid is arranged in the differential pressure display tube, and the differential pressure display tube is provided with communication pipe between inlet pipe and outlet pipe.

[0008] As a further improvement of the above technical solution:

[0009] Control valves are arranged on the communicating pipes.

[0010] The differential pressure display tube is made of colorless and transparent PU hose, and a fastening clamp is arranged at the connection between the differential pressure display tube and the communicating pipe.

[0011] The differential pressure display tube is a U-shaped tube.

[0012] The differential pressure display liquid is colored liquid.

[0013] The display unit further comprises a display back plate, and buckles for fixing the differential pressure display tube are arranged on the display back plate.

[0014] A normal ammonia injection adjusting area is arranged in the middle of the display back plate, a first fault area is arranged above the normal ammonia injection adjusting area, and a second fault area is arranged below the normal ammonia injection adjusting area.

[0015] The beneficial effects of the embodiment of the utility model are as follows: the ammonia injection amount rapid indicator comprises a collection unit and a display unit, the collection unit comprises an air inlet pipe and an air outlet pipe, a perforated plate flowmeter is arranged between the air inlet pipe and the air outlet pipe, the display unit comprises a differential pressure display tube, differential pressure display liquid is arranged in the differential pressure display tube, a communicating pipe is arranged between the differential pressure display tube and the air inlet pipe and the air outlet pipe, the pressure value in the pipeline is collected after the collection unit is connected with the air inlet pipe and the air outlet pipe, then the display unit is used to display the collected pressure value, the conventional structure is simple and convenient for pressure difference observation, and the detection element does not need to be cleaned, calibrated and maintained frequently in the later maintenance process, the display unit is used to replace the conventional numerical display screen, the cost is low and the display unit is not easy to be damaged, and the equipment investment cost can be effectively saved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front view of the utility model;

[0017] Figure 2 It is a top view of the utility model;

[0018] Figure 3 It is a sectional view of the utility model;

[0019] Figure 4 It is a schematic view of the installation structure of the differential pressure display tube in the utility model.

[0020] In the drawing: 1, air inlet pipe; 2, air outlet pipe; 3, perforated plate flowmeter; 4, differential pressure display tube; 5, differential pressure display liquid; 6, communicating pipe; 7, control valve; 8, fastening clamp; 9, display back plate; 10, buckle; 11, normal ammonia injection adjusting area; 12, first fault area; 13, second fault area. DETAILED DESCRIPTION

[0021] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0022] like Figures 1-4 As shown, the rapid ammonia injection indicator of this embodiment includes a data acquisition unit and a display unit. The data acquisition unit includes an inlet pipe 1 and an outlet pipe 2, with an orifice flow meter 3 installed between the inlet pipe 1 and the outlet pipe 2. The display unit includes a differential pressure display tube 4, with a differential pressure display liquid 5 installed inside the differential pressure display tube 4. A connecting pipe 6 is provided between the differential pressure display tube 4 and the inlet pipe 1 and the outlet pipe 2. After the data acquisition unit is connected to the inlet pipe 1 and the outlet pipe 2, the pressure value in the pipeline is acquired. Then, the acquired pressure value is displayed using the display unit. Compared with conventional structures, this one is simple and easy to observe the pressure difference. Moreover, it eliminates the need for frequent cleaning and calibration of the detection element during later maintenance. Using the display unit instead of a conventional numerical display screen is low-cost and not easily damaged, effectively saving equipment investment costs.

[0023] Each connecting pipe 6 is equipped with a control valve 7. When the pressure difference value of the display unit is within the normal ammonia injection adjustment zone 11, the amount of ammonia injected can be controlled by the control valve 7 without stopping the machine for replacement and maintenance.

[0024] The differential pressure display tube 4 is made of colorless and transparent PU tubing. PU tubing is more flexible than glass tubing, so it will not break when personnel walk and observe within the gaps of the ammonia spraying grid. The connection between the differential pressure display tube 4 and the connecting pipe 6 is equipped with a fastening clamp 8. The fastening clamp 8 is used to connect and seal the connection between the differential pressure display tube 4 and the connecting pipe 6. The structure is simple and easy to operate.

[0025] The differential pressure display tube 4 is a U-shaped tube, with its two ends connected to the air inlet pipe 1 and the air outlet pipe 2, respectively. The pressure value changes cause the pressure display liquid 5 to float up and down, thereby confirming and observing the differential pressure.

[0026] The differential pressure display liquid 5 uses a colored liquid, preferably colored glass water, which facilitates observation of the operation.

[0027] The display unit also includes a display backplate 9, which has a buckle 10 for fixing the differential pressure display tube 4. The main function of the display backplate 9 is to fix the differential pressure display tube 4, so as to avoid the differential pressure display tube 4 from falling down when PU hose is selected as the differential pressure display tube 4, which would cause the shape of the differential pressure display tube 4 to be unstable and affect the accuracy of the observed values.

[0028] The middle part of the display backboard 9 is provided with an ammonia injection normal adjustment area 11, the first fault area 12 is arranged above the ammonia injection normal adjustment area 11, and the second fault area 13 is arranged below the ammonia injection normal adjustment area 11, when the two ends of the differential pressure display liquid 5 are located in the ammonia injection normal adjustment area 11, if the differential pressure is too large, the differential pressure can be adjusted by controlling the valve 7, if one end of the differential pressure display liquid 5 is located in the first fault area 12 and the second fault area 13, the sealing of the connection between the differential pressure display tube 4 and the communication tube 6 needs to be checked or the whole equipment needs to be repaired and replaced.

[0029] It should be noted that in actual use, every three ammonia injection branch pipes form a group, and the ammonia injection amount quick indicator provided by the utility model is arranged on each ammonia injection branch pipe, at this time, the zero mark line is designed in the middle part of the display backboard 9, the distance between the two ends of the differential pressure display liquid 5 of the three indicators and the zero mark line is the same, which indicates that the pressure difference is the same, at this time, the standard differential pressure value is recorded, if the differential pressure value of one of them becomes larger in use, it indicates that there may be pipe or nozzle wear, if the differential pressure value is less than the standard value, it may be that some nozzles are blocked, at this time, the manual adjustment is carried out by controlling the valve, so that the differential pressure values of the three ammonia injection branch pipes remain the same, so as to maximize the avoidance of the phenomenon of local ammonia injection deficiency or excessive ammonia injection.

[0030] It should be noted that in the description of the utility model, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and is not intended to indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0031] In addition, it should be further pointed out that, in the description of the utility model, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] The term "includes" or any other similar term is intended to cover non-exclusive inclusion, so that the process, article or equipment / device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes the elements inherent in the process, article or equipment / device.

[0033] Thus far, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the protection scope of the utility model is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without deviating from the principles of the utility model, and the technical schemes after these changes or replacements will all fall within the protection scope of the utility model.

Claims

1. A quick indication instrument for ammonia injection quantity, comprising a collection unit and a display unit, characterized in that: The collecting unit comprises an air inlet pipe (1) and an air outlet pipe (2), and a hole plate flowmeter (3) is arranged between the air inlet pipe (1) and the air outlet pipe (2); The display unit comprises a differential pressure display tube (4), and differential pressure display liquid (5) is arranged in the differential pressure display tube (4); and a communication pipe (6) is arranged between the differential pressure display tube (4) and the air inlet pipe (1) and the air outlet pipe (2).

2. The quick ammonia injection indicator according to claim 1, wherein: A control valve (7) is arranged on each communication pipe (6).

3. The quick ammonia injection indicator of claim 2, wherein: The differential pressure display tube (4) is made of colorless and transparent PU hose, and a fastening clamp (8) is arranged at the connection between the differential pressure display tube (4) and the communication pipe (6).

4. The quick indicator of the ammonia injection amount according to any one of claims 1 to 3, characterized by: The differential pressure display tube (4) is a U-shaped tube.

5. The quick ammonia injection indicator of claim 1, wherein: The differential pressure display liquid (5) is colored liquid.

6. The quick ammonia injection indicator of claim 1, wherein: The display unit further comprises a display back plate (9), and buckles (10) for fixing the differential pressure display tube (4) are arranged on the display back plate (9).

7. The quick ammonia injection indicator of claim 6, wherein: An ammonia injection normal adjustment area (11) is arranged in the middle of the display back plate (9), a first fault area (12) is arranged above the ammonia injection normal adjustment area (11), and a second fault area (13) is arranged below the ammonia injection normal adjustment area (11).

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