Device for measuring wind speed uniformity of denitration system

Abstract

The utility model discloses a denitration system wind speed uniform distribution measuring device, which comprises a plurality of multi-position differential pressure detecting devices arranged above a denitration catalyst layer and below an ammonia spraying rectification grid, a plurality of measuring holes are formed in the side surface of the denitration system at equal intervals, and the measuring holes are communicated with the denitration catalyst layer. The multi-position differential pressure detection devices are installed in the corresponding measuring holes, each multi-position differential pressure detection device comprises a steel pipe and a plurality of pitot tubes, the pitot tubes are fixedly installed in the steel pipe, and the detection ends of the pitot tubes are installed in the measuring holes. According to the utility model, when wind speed measurement needs to be carried out in a denitration part, the steel pipe is pushed into the measuring hole, precise control of the pitot tubes is realized, differential pressure of corresponding positions can be measured through the pitot tubes, and the plurality of pitot tubes are arranged in the steel pipe, so that wind speeds of multiple points of a detection section can be acquired at the same time; the consistency of wind speed collection at the same time is kept, and the detection precision is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to denitration equipment detection technical field more specifically, especially relates to a denitration system wind speed uniformity measuring device BACKGROUND

[0002] At present, in the field of flue gas catalyst reduction method denitration of coal-fired power plant, in order to improve the flow field uniformity of denitration system, according to the design requirement, the relative standard deviation Cv value of wind speed before and after ammonia grid and before and after the inlet section of denitration catalyst cannot be greater than 15%, in order to meet this requirement, the simulation calculation of flow field is usually carried out during the design stage and the corresponding flow guide plate is arranged, to ensure the uniform mixing of ammonia gas and flue gas at ammonia grid and the uniformity of ammonia injection at the inlet of denitration catalyst, to avoid local ammonia over injection or less injection. Usually, the flow field uniformity is not detected during the operation of the unit, and the actual flow field uniformity of denitration system during operation cannot be accurately evaluated. UTILITARY MODEL

[0003] The utility model discloses a kind of denitration system wind speed uniformity measuring devices.

[0004] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: a denitration system wind speed uniformity measuring device, comprising multiple differential pressure detection devices arranged above the denitration catalyst layer and below the ammonia injection rectifier grid, the multiple differential pressure detection devices are provided with multiple, the denitration system is equidistantly provided with multiple measuring holes on the side, the multiple differential pressure detection devices are installed in the corresponding measuring holes, and the multiple differential pressure detection devices include a steel pipe and multiple pitot tubes, the multiple pitot tubes are fixedly installed in the steel pipe, and the detection end of the pitot tube is located inside the measuring hole arranged in the denitration system.

[0005] Preferably, a mechanical seal is fixedly installed outside the measuring hole, and one end of the steel pipe is inserted into the measuring hole arranged in the denitration system through the mechanical seal.

[0006] Preferably, a locking mechanism is arranged on the mechanical seal, and the locking mechanism is used for fixing the corresponding steel pipe.

[0007] Preferably, the locking mechanism is a knob bolt, a threaded hole is arranged on the surface of the mechanical seal, and the knob bolt is connected with the threaded hole in a matched mode.

[0008] Preferably, the detection end of the multiple pitot tubes inside the steel pipe extends into the measuring hole arranged in the denitration system at different distances.

[0009] Preferably, a handle is fixedly installed at the outer end of the steel pipe.

[0010] Preferably, a scale line is arranged on the outer surface of the steel pipe along the length direction.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] The utility model discloses when needing to measure the wind speed inside the denitration system, pushes the steel pipe into the measuring hole inside the denitration system setting, realizes the accurate control to pitot tube, can measure the differential pressure of corresponding position through pitot tube, because multiple pitot tubes are arranged inside the steel pipe, can simultaneously gather the wind speed of multiple points of detection section, keeps the consistency of wind speed collection of same time, improves the precision of detection. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to make the technical scheme in the embodiments of the utility model or prior art clearer, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description are only some embodiments of the utility model, and for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative labor.

[0014] Fig. 1 It is the structure diagram of the denitration tower body of the utility model;

[0015] Fig. 2 It is the perspective view of a kind of denitration system wind speed uniformity measuring device of the utility model;

[0016] Fig. 3 It is the sectional view of a kind of denitration system wind speed uniformity measuring device of the utility model.

[0017] In the drawing: 1, denitration system flue;11, ammonia injection layer;12, rectifier grid;13, guide plate;14, measuring hole;2, multiple differential pressure detection device;21, steel pipe;22, pitot tube;23, mechanical seal;24, locking mechanism;25, handle. DETAILED DESCRIPTION

[0018] The preferred embodiments of the utility model will be described in detail below in combination with the drawings, so that the advantages and characteristics of the utility model can be more easily understood by those skilled in the art, so that the protection scope of the utility model can be more clearly and explicitly defined.

[0019] Reference Figs. 1-3The utility model provides a kind of denitration system wind speed uniformity measuring device, including the multiple differential pressure detection device 2 being set in the ammonia injection layer 11 above of denitration system flue 1 and below rectifier grid 12, the elbow of denitration system flue 1 inside is all equipped with backflow plate 13, the multiple differential pressure detection device 2 is equipped with multiple, the side of denitration system flue 1 equidistantly is equipped with multiple measuring holes 14, the multiple differential pressure detection device 2 is installed in corresponding measuring hole 14, multiple differential pressure detection device 2 includes steel pipe 21 and multiple pitot tube 22, multiple pitot tube 22 is all fixedly installed in steel pipe 21, the detection end of pitot tube 22 is located in denitration system flue 1 inside, and pitot tube 22 is also called " air speed pipe", " wind speed pipe", and pitot tube 22 is a tubular device for measuring total pressure and static pressure to determine airflow velocity.

[0020] To improve the sealing, in the embodiment, the measuring hole 14 is fixedly installed with a mechanical seal 23 outside, and one end of the steel pipe 22 is inserted into the inside of the desulfurization tower body 1 through the mechanical seal 23.

[0021] In the embodiment, the mechanical seal 23 is provided with a locking mechanism 24, and the locking mechanism 24 is used to fix the corresponding steel pipe 21.

[0022] In the embodiment, the locking mechanism 24 is a knob bolt, the surface of the mechanical seal 23 is provided with a threaded hole, and the knob bolt is connected with the threaded hole in a matched mode.

[0023] In the embodiment, the detection ends of the multiple pitot tubes 22 inside the steel pipe 21 extend into the inside of the desulfurization tower body 1 at different distances, so as to improve the detection range of the multiple pitot tubes 22 inside the desulfurization tower body 1.

[0024] Further, in order to facilitate the staff to pull the steel pipe 21, in the embodiment, a handle 25 is fixedly installed at the outer end of the steel pipe 21.

[0025] Further, in order to facilitate the accurate adjustment of the length of the steel pipe 21 extending into the inside of the denitration system flue 1, in the embodiment, a scale line is arranged on the outer surface of the steel pipe 21 along the length direction.

[0026] The specific operation steps are as follows: when the wind speed inside the denitration system flue needs to be measured, the knob bolt is loosened, and then the steel pipe 21 is pushed into the inside of the desulfurization tower body 1, the distance of the detection end of the pitot tube 22 extending into the inside of the denitration system flue 1 can be observed by observing the scale line on the outer surface of the steel pipe 21, so as to realize the accurate control of the pitot tube 22, and the differential pressure of the corresponding position can be measured through the pitot tube 22.

[0027] Although the embodiments of the present application are described in conjunction with the drawings, the patent owner can make various modifications or changes within the scope of the appended claims, as long as they do not exceed the protection scope described in the claims of the present application, they should be within the protection scope of the present application.

Claims

1. A device for measuring uniformity of wind speed in a denitration system, comprising a plurality of differential pressure detection devices arranged above a denitration catalyst layer and below an ammonia injection rectifying grid, characterized in that: The multiple differential pressure detection devices are provided, multiple measuring holes are equidistantly arranged on the side of the denitration system, the multiple differential pressure detection devices are installed in the corresponding measuring holes, the multiple differential pressure detection devices comprise a steel pipe and multiple pitot tubes, the multiple pitot tubes are fixedly installed in the steel pipe, and detection ends of the pitot tubes are located inside the measuring holes arranged on the denitration system.

2. The device according to claim 1, wherein: A mechanical seal is fixedly installed outside the measuring hole, and one end of the steel pipe is inserted into the measuring hole arranged on the denitration system through the mechanical seal.

3. The device according to claim 2, wherein: A locking mechanism is arranged on the mechanical seal, and the locking mechanism is used for fixing the corresponding steel pipe.

4. The device according to claim 3, wherein: The locking mechanism is a knob bolt, a threaded hole is arranged on the surface of the mechanical seal, and the knob bolt is connected with the threaded hole in a matched mode.

5. The device according to claim 1, wherein: Distances, by which the detection ends of the multiple pitot tubes in the steel pipe extend into the inside of the desulfurization tower body, are inconsistent.

6. The device according to claim 1, wherein: A handle is fixedly installed on the outer end of the steel pipe.

7. The device according to claim 1, wherein: Scale lines are arranged on the outer surface of the steel pipe along the length direction.

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