CN214471072U

CN214471072U - Power plant's coal pulverizer entry mixed wind flow measuring device

Info

Publication number: CN214471072U
Application number: CN202023280871.3U
Authority: CN
Inventors: 王庆鹏; 华伟; 王洪伟; 郭旭; 诸秉奇; 云正浩; 李文东; 许彬; 李海泉; 索占潮
Original assignee: Northeast Electric Power Design Institute of China Power Engineering Consulting Group; North United Power Co Ltd; Xilingol Thermal Power Co Ltd
Current assignee: Northeast Electric Power Design Institute of China Power Engineering Consulting Group; North United Power Co Ltd; Xilingol Thermal Power Co Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-10-22
Anticipated expiration: 2030-12-29

Abstract

The utility model provides a power plant's coal pulverizer entry mixes wind flow measurement device, measuring device includes flowmeter and mechanical structure rectifier, and wherein flowmeter and mechanical structure rectifier all are located power plant's coal pulverizer entry wind channel, the mechanical structure rectifier for the flowmeter is located the last wind direction side of wind flow direction in the power plant's coal pulverizer entry wind channel, there is one section distance between flowmeter and the mechanical structure rectifier, thereby the mechanical structure rectifier makes entry wind mixed flow more even improvement the measurement accuracy of flowmeter.

Description

Power plant's coal pulverizer entry mixed wind flow measuring device

Technical Field

The utility model relates to a measuring device field especially relates to the mixed wind flow measurement device of power plant's coal pulverizer entry.

Background

The mixed air flow at the inlet of the coal mill of the power plant is generally measured by a conventional thermal flow measuring device or a multi-point differential pressure flow measuring device. Under the influence of air channel arrangement, the mixed air channel at the inlet of the coal mill under the general condition is very short, meanwhile, the airflow field in the air channel is influenced by the opening of the cold and hot adjusting air doors, the variation range of the temperature field is large, and the airflow is not uniformly distributed, so that the measurement results of the hot type or multipoint differential pressure type measurement device have large errors, the primary air flow of the coal mill cannot be automatically controlled directly, and the combustion economy of a boiler cannot be ensured.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a mixed air flow measuring device at the inlet of a coal mill in a power plant, which comprises a flowmeter and a mechanical structure rectifier; wherein:

the flow meter and the mechanical structure rectifier are both positioned in an air duct at the inlet of the coal mill in the power plant, the mechanical structure rectifier is positioned on the upwind side of the wind flow direction in the air duct relative to the flow meter, and a distance exists between the flow meter and the mechanical structure rectifier; the mechanical structure rectifier enables the air flow mixing at the inlet to be more uniform, so that the measurement accuracy of the flowmeter is improved.

Further, the flowmeter is a multipoint differential pressure flow measuring element or a thermal anemometer.

Further, the mechanical structure rectifier is a swirl vane or angle steel type rectifier or a square steel type rectifier.

Further, the specific mechanical structure of the mechanical structure rectifier is determined through simulation calculation of the cloud picture of the airflow field.

Further, the flow meter and/or the mechanical structure rectifier are/is installed in the inlet air duct of the coal mill of the power plant through a pipeline flange.

Furthermore, a hot air regulating valve is further arranged in an air duct of the inlet of the coal mill of the power plant, and the air volume measured by the flowmeter is used for automatically controlling the hot air regulating valve.

The utility model discloses an increase the mechanical structure rectifier in the pipeline, improve near the air current distribution condition in flowmeter measuring point, make the measurement data more accurate, the rectifier mechanical structure of different forms can satisfy the change of coal-grinding wind pipeline form simultaneously, has very strong adaptability.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural diagram of a mixed air flow measuring device at an inlet of a coal mill in a power plant provided by the present invention;

fig. 2 is a schematic diagram of a technical effect of the device for measuring the mixed air flow at the inlet of the coal mill in the power plant provided by the novel implementation model.

Wherein, 1 power plant's coal pulverizer entry wind channel, 2 hot-blast governing valves, 3 flowmeters, 4 mechanical structure rectifiers.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description of the present invention and do not require that the present invention must be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In addition, in the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and for example, they may be mechanically or electrically connected, or they may be connected to each other within two elements, directly or indirectly through an intermediate medium, and those skilled in the art may understand the specific meanings of the above terms according to specific situations.

Further, in the description of any method below, any process or method description in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and the scope of the preferred embodiments of the present invention includes additional implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present invention.

The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.

It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system.

Reference is made to the description accompanying figure 1. The embodiment discloses a mixed wind flow measuring device of power plant's coal pulverizer entry, measuring device includes flowmeter 3 and mechanical structure rectifier 4, wherein:

flowmeter 3 and mechanical structure rectifier 4 all are located in power plant's coal pulverizer entry wind channel 1, mechanical structure rectifier 4 for flowmeter 3 is located the upwind side of the wind flow direction in power plant's coal pulverizer entry wind channel 1, there is one section distance between flowmeter 3 and the mechanical structure rectifier 4. Fig. 2 shows the technical effect of the present implementation, and the mechanical structure rectifier 4 makes the inlet air flow mixing more uniform, thereby improving the measurement accuracy of the flowmeter 3. Still include hot air adjusting valve 2 in the coal pulverizer entry wind channel 1 of power plant, the amount of wind that flowmeter 3 measured can be used for hot air adjusting valve 2's automatic control.

In a specific embodiment, the flow meter 3 is a multi-point differential pressure flow measurement element or a thermal anemometer. The mechanical structure rectifier 4 is a swirl vane or angle steel type rectifier or a square steel type rectifier. The specific mechanical structure of the mechanical structure rectifier 4 can be determined by analog calculation of the cloud image of the airflow field.

In a specific embodiment, the flow meter 3 and/or the mechanical structure rectifier 4 are mounted in the power plant coal mill inlet duct 1 by means of a pipe flange.

The utility model discloses an increase in the pipeline through calculating the mechanical structure of three kinds of different forms of whirl blade, angle steel form rectifier, square steel form rectifier confirmed, improve near the air current distribution condition of flowmeter measuring point, make metering data more accurate, the rectifier mechanical structure of different forms can satisfy the change of coal-grinding wind pipeline form simultaneously, has very strong adaptability.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. The utility model provides a power plant's coal pulverizer entry mixed wind flow measuring device which characterized in that: the measuring device comprises a flowmeter (3) and a mechanical structure rectifier (4); wherein:

the flowmeter (3) and the mechanical structure rectifier (4) are both positioned in an inlet air duct (1) of a coal mill in a power plant, the mechanical structure rectifier (4) is positioned on the upwind side of the wind flow direction in the inlet air duct (1) of the coal mill in the power plant relative to the flowmeter (3), and a distance exists between the flowmeter (3) and the mechanical structure rectifier (4); the mechanical structure rectifier (4) enables inlet air mixed flow to be more uniform, and therefore measurement accuracy of the flowmeter (3) is improved.

2. The measurement device of claim 1, wherein: the flowmeter (3) is a multipoint differential pressure flow measuring element or a thermal anemometer.

3. The measurement device of claim 1, wherein: the mechanical structure rectifier (4) is a swirl vane or angle steel type rectifier or a square steel type rectifier.

4. The measurement device of claim 1, wherein: the specific mechanical structure of the mechanical structure rectifier (4) is determined through simulation calculation of the cloud picture of the airflow field.

5. The measurement device of claim 1, wherein: the flowmeter (3) and/or the mechanical structure rectifier (4) are/is installed in the inlet air duct (1) of the coal mill of the power plant through a pipeline flange.

6. The measurement device of claim 1, wherein: still have hot blast regulating valve (2) in power plant's coal pulverizer entry wind channel (1), the amount of wind that flowmeter (3) measured is used for the automatic control of hot blast regulating valve (2).