CN113218460A - Air volume measuring structure based on flow equalizing technology - Google Patents
Air volume measuring structure based on flow equalizing technology Download PDFInfo
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- CN113218460A CN113218460A CN202110557674.1A CN202110557674A CN113218460A CN 113218460 A CN113218460 A CN 113218460A CN 202110557674 A CN202110557674 A CN 202110557674A CN 113218460 A CN113218460 A CN 113218460A
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- air pipe
- flow equalizing
- primary air
- structure based
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Volume Flow (AREA)
Abstract
The invention discloses an air quantity measuring structure based on a flow equalizing technology. Including primary air pipe, secondary air pipe, flow equalizing element and anemometry component, primary air pipe one end is the air intake, and the other end is for grinding the entry, the secondary air pipe is located the air intake lower extreme and communicates with each other with primary air pipe, the flow equalizing element is arranged in carrying out reposition of redundant personnel, mixed flow and water conservancy diversion to the air current that lets in primary air pipe and secondary air pipe, the anemometry component is used for measuring the amount of wind that grinds the entry, the anemometry component is fixed with primary air pipe. The invention discloses an air volume measuring structure based on a flow equalizing technology, which can solve the problem that the primary air volume and the secondary air volume of an inlet of the existing coal mill are not accurately measured.
Description
Technical Field
The invention relates to the technical field of air volume measurement of inlets of coal mills, in particular to an air volume measurement structure based on a flow equalizing technology.
Background
The coal mill is a key device for crushing after the materials are crushed, and is widely applied to production industries of cement, silicate products, novel building materials, refractory materials, chemical fertilizers, black and non-ferrous metal ore dressing, glass ceramics and the like, and is used for dry or wet grinding of various ores and other grindable materials.
The primary air quantity and the secondary air quantity at the inlet of the coal mill during the operation of the existing coal mill used in a power plant are mixed and introduced into the coal mill, and the primary air quantity and the secondary air quantity are measured inaccurately at a pipeline by an air measuring element, so that the power consumption of a primary fan and a blower is increased; the heat efficiency of the boiler is influenced by synchronously increasing the cold primary air quantity; the secondary air meter dial air quantity is distorted, and the overfire air and the layer air quantity have poor adjusting characteristics; the primary air speed at the outlet of the combustor is too high, so that pulverized coal ignition and combustion are influenced, the low-load stable combustion of a boiler is not facilitated, and the safety, economic operation and the like of a unit are seriously influenced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention discloses an air volume measuring structure based on a flow equalizing technology, which can solve the problem that the primary air volume and the secondary air volume at the inlet of the existing coal mill are not accurately measured.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme:
the utility model provides an amount of wind measurement structure based on technique of flow equalizing, includes primary air pipe, secondary air pipe, flow equalizing component and anemometry component, and primary air pipe one end is the air intake, and the other end is for grinding the entry, the secondary air pipe is located the air intake lower extreme and communicates with each other with primary air pipe, the flow equalizing component is arranged in shunting, mixed flow and water conservancy diversion to the air current that lets in primary air pipe and secondary air pipe, the anemometry component is used for measuring the amount of wind that grinds the entry, the anemometry component is fixed with primary air pipe.
The flow equalizing device comprises a flow equalizing plate, a grid and a guide plate, wherein the flow equalizing plate is fixed with the inner wall of the primary air pipe, and the grid is positioned behind the flow equalizing plate and fixed with the inner wall of the primary air pipe.
According to the preferable technical scheme, a plurality of groups of flow equalizing holes are formed in the flow equalizing plate.
According to the preferable technical scheme, the grid is formed by crosswise combining a plurality of groups of transverse plates and vertical plates.
The air guide plate is arranged on the inner wall of the primary air pipe, the air guide plate is fixedly arranged at a 90-degree corner of the primary air pipe, the air guide plate is arranged at a 90-degree corner of the joint of the secondary air pipe and the primary air pipe, and the inner wall of the primary air pipe and the inner wall of the secondary air pipe at the 90-degree corner are arranged to be arc-shaped.
According to the preferable technical scheme, the wind measuring element adopts a matrix type flowmeter.
According to the preferable technical scheme, the matrix type flowmeter body is sprayed with a tungsten carbide coating.
(III) advantageous effects
The invention discloses an air quantity measuring structure based on a flow equalizing technology, which has the following advantages:
on the premise of not changing the original air duct arrangement, the speed and the temperature distribution uniformity and stability of the air duct section where the wind measuring element is located are improved through the modularized flow distributing, mixing, guiding and rectifying elements of the flow equalizing element.
Wherein, the flow equalizing plate has the effect of uniform distribution to the air current.
Wherein, the grid further plays equipartition and water conservancy diversion effect to the air current.
Wherein the air deflector plays the guide effect to the air current in 90 corners.
The wind measuring element adopts a matrix type flowmeter, a plurality of groups of measuring points are effectively combined, and the arrangement mode of full-section coverage enables the wind measuring element to be combined with a flow equalizing element, so that the measuring result is more accurate, and the service life of the wind measuring element can be effectively prolonged by spraying tungsten carbide on the body.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is an overall schematic diagram of an embodiment of the present invention;
FIG. 2 is a cutaway schematic view of an embodiment of the present invention;
FIG. 3 is a schematic view in partial cross-section of an embodiment of the invention;
FIG. 4 is a schematic diagram of a matrix flow meter according to an embodiment of the present invention.
Wherein: the device comprises a primary air pipe 1, a secondary air pipe 2, an air inlet 3, a grinding inlet 4, a flow equalizing element 5, a wind measuring element 6, a flow equalizing plate 7, a grid 8, a flow guiding plate 9, a flow equalizing hole 10, a transverse plate 11, a vertical plate 12 and a matrix type flowmeter 13.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 4, an air volume measuring structure based on a flow equalizing technology according to an embodiment of the present invention includes a primary air duct 1, a secondary air duct 2, a flow equalizing element 5, and an air measuring element 6, where one end of the primary air duct 1 is an air inlet 3, the other end of the primary air duct is a mill inlet 4, the secondary air duct 2 is located at the lower end of the air inlet 3 and is communicated with the primary air duct 1, the flow equalizing element 5 is configured to split, mix, and guide air flows introduced into the primary air duct 1 and the secondary air duct 2, the air measuring element 6 is configured to measure an air volume at the mill inlet 4, and the air measuring element 6 is fixed to the primary air duct 1.
The flow equalizing plate 7 is provided with a plurality of groups of flow equalizing holes 10.
The grid 8 is made of a plurality of groups of transverse plates 11 and vertical plates 12 which are combined in a crossed mode.
The wind measuring element 6 adopts a matrix flow meter 13.
And a tungsten carbide coating is sprayed on the matrix flowmeter 13 body.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.
Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (7)
1. An air volume measuring structure based on a flow equalizing technology is characterized by comprising a flow equalizing device;
the device comprises a primary air pipe and a secondary air pipe, wherein one end of the primary air pipe is an air inlet, the other end of the primary air pipe is a mill inlet, and the secondary air pipe is positioned at the lower end of the air inlet and is communicated with the primary air pipe;
the flow equalizing element is used for shunting, mixing and guiding the air flow introduced into the primary air pipe and the secondary air pipe;
and the wind measuring element is used for measuring the wind quantity of the grinding inlet and is fixed with the primary air pipe.
2. The air volume measuring structure based on the current sharing technology according to claim 1, characterized in that: the flow equalizing element is provided with two groups and is respectively installed at an air inlet of the primary air pipe and the secondary air pipe, the flow equalizing element comprises a flow equalizing plate, a grid and a guide plate, the flow equalizing plate is fixed with the inner wall of the primary air pipe, and the grid is positioned at the rear of the flow equalizing plate and fixed with the inner wall of the primary air pipe.
3. The air volume measuring structure based on the current sharing technology according to claim 2, characterized in that: and a plurality of groups of flow equalizing holes are arranged on the flow equalizing plate.
4. The air volume measuring structure based on the current sharing technology according to claim 2, characterized in that: the grid is made of a plurality of groups of transverse plates and vertical plates in a crossed combination mode.
5. The air volume measuring structure based on the current sharing technology according to claim 2, characterized in that: the guide plate is equipped with a plurality ofly, and fixed mounting is in the 90 corners of primary air pipe, the 90 corners of secondary air pipe and primary air pipe junction are equipped with the guide plate, and the primary air pipe and the secondary air pipe inner wall of 90 corners establish to the circular arc type.
6. The air volume measuring structure based on the current sharing technology according to claim 1, characterized in that: the wind measuring element adopts a matrix type flowmeter.
7. The air volume measuring structure based on the current sharing technology according to claim 6, characterized in that: and a tungsten carbide coating is sprayed on the matrix type flowmeter body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110557674.1A CN113218460A (en) | 2021-05-21 | 2021-05-21 | Air volume measuring structure based on flow equalizing technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110557674.1A CN113218460A (en) | 2021-05-21 | 2021-05-21 | Air volume measuring structure based on flow equalizing technology |
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2021
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Application publication date: 20210806 |
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