CN116576131A - Anti-surge line operation adjusting method for static blade adjustable axial flow compressor operation working condition point pasting - Google Patents
Anti-surge line operation adjusting method for static blade adjustable axial flow compressor operation working condition point pasting Download PDFInfo
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- CN116576131A CN116576131A CN202310753407.0A CN202310753407A CN116576131A CN 116576131 A CN116576131 A CN 116576131A CN 202310753407 A CN202310753407 A CN 202310753407A CN 116576131 A CN116576131 A CN 116576131A
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- working condition
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- line
- condition point
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 230000003068 static effect Effects 0.000 title claims abstract description 22
- 230000009471 action Effects 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims 1
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention relates to the technical field of fan control, in particular to a static blade adjustable axial flow compressor operation working condition point sticking anti-surge line operation adjustment method which is characterized in that the distance between an operation working condition point and a blow-off line is used as a reference for adjustment of a blow-off valve, the distance between the operation working condition point and the blow-off line is 1% -1.5% under normal working conditions, when the distance is less than 1%, the operation working condition point is operated by adopting a method of opening the blow-off valve by 1% during the wind reduction operation, and when the distance is greater than 1.5%, the operation working condition point is operated by adopting a method of closing the blow-off valve by 1% during the wind addition. The invention has the advantages that: 1) The economic benefit is considerable by controlling the adjustment of the line pasting operation. 2) The air release valve is enabled to adjust the distance between the working point of the fan and the anti-surge line, the distance is guaranteed to be within 1-1.5%, the air release line is striven for running on the premise that the stability of equipment and the running working condition are guaranteed not to fluctuate, the air release quantity of the axial flow fan is furthest reduced, the energy loss is reduced, and the stability of the working condition of a user is guaranteed.
Description
Technical Field
The invention relates to the technical field of fan control, in particular to a static blade adjustable axial flow compressor operation working condition point pasting anti-surge line operation adjustment method.
Background
An AV100-18 electric blower of an energy management and control center of a certain steel mill is matched with a blast furnace and is 2850m of an iron mill 3 When the blast furnace supplies air, the blast furnace is equivalent to a large maraca, and a part of air needs to be discharged by an air discharge valve to run. In order to leave a certain adjustment space, the automatic opening of the air release valve in the operation is avoided, the working condition of the blast furnace is influenced, the air release valve of the blower is required to be opened for some air release operation, so that the air release loss is caused, and meanwhile, the power of the main motor is increased, so that the air release loss is causedWaste of energy.
In the production process, the working condition operation point fluctuates at all times and needs to be continuously regulated, and as no mature regulation and control method exists at present, operators can only regulate the angle of the static blade and the surge valve according to experience, and the control effect is greatly influenced by human factors. In order to prevent the working condition operating point from entering the surge control line, a common operator controls the working condition operating point at a position far away from the surge control line, and the farther the working condition operating point is away from the surge control line, the safer the blower is operated, but the more serious the energy waste is.
In order to reduce exhaust loss, the air release valve can be optimally adjusted to a small opening according to the distance between the working condition point and the air release line, and the air quantity is adjusted in a mode of matching the air release valve with the angle of the static blade, so that the safety of the blower is ensured, the air quantity requirement of the blast furnace is met, and the exhaust loss is reduced to the minimum.
The Chinese patent application No. 201910439454.1 discloses an energy-saving operation regulation method of a blast furnace blower, in the patent document, the safety margin of 20kPA is still reserved between the operating working condition point of the blower and the anti-surge line, and the air discharge quantity of the blower is not considered in the economic operating condition. Although the optimal operation working condition point (the minimum power) under the same angle with the stationary blade is found, the air discharge quantity is larger, and the power loss is larger.
Disclosure of Invention
The invention aims to provide an anti-surge line operation adjusting method for the operation working condition point paste of the static blade adjustable axial flow compressor, which overcomes the defects of the prior art, changes the pipeline characteristics and the compressor characteristics by adjusting the anti-surge valve and the static blade angle of an axial flow blower, effectively controls the position of the operation working condition point in an operation working condition diagram, enables the operation working condition point paste to operate in an anti-surge line mode, and furthest reduces the air output of the axial flow blower. Not only reduces energy loss, but also ensures the stability of the working condition of the user.
In order to achieve the above purpose, the present invention is realized by the following technical scheme:
the static blade adjustable axial flow compressor operation working condition point sticking anti-surge line operation adjustment method is characterized in that the distance between the operation working condition point and a vent line is used as a reference for adjustment of the vent valve, under normal working conditions, the distance between the operation working condition point and the vent line is 1% -1.5% as an adjustment target, when the distance is less than 1%, the operation working condition point is operated by adopting a method of opening the vent valve by 1%, when the distance is greater than 1.5%, and when the distance is greater than 1.5%, the operation working condition point is operated by adopting a method of closing the vent valve by 1%.
The operation working condition points are intersecting points of ordinate wind pressure and abscissa wind quantity in the operation working condition diagram.
And under the normal working condition, the protection action electromagnetic valve triggers the air release valve to be opened when the electromagnetic valve is in power failure protection.
When the distance between the working condition point and the air release line is less than or equal to 0 percent, the numerical value and the speed which are less than 0 are in direct proportion to the opening speed of the air release valve and the valve position.
When the distance between the working point and the air release line is less than 1%, the air adding blade is adopted for adjusting when the blast furnace is changed and the air quantity is added; when the air quantity is reduced, an integral mode of opening an air valve is adopted.
When the distance between the working condition points and the air release line is greater than 1.5%, when the blast furnace is changed and the air quantity is added, the operation is performed by adopting a method of combining air release valve closing and static blade adding adjustment; when the blast furnace reduces the air quantity, the combination of the static reducing blade and the air release valve is adopted for operation.
Under the normal working condition, when the distance between the working condition points and the air release line is less than or equal to 0%, the air release valve is automatically opened.
Compared with the prior art, the invention has the beneficial effects that:
1) The air output of the original production line electric drum for 6 furnaces is averagely 1100m by controlling the adjustment of the line pasting operation 3 /min, decreasing to 683m 3 Per min, the air release amount is reduced by 417m 3 The theoretical power saving is about 2000kWh per minute, and the economic benefit is considerable.
2) The air release valve is enabled to adjust the distance between the working point of the fan and the anti-surge line, the distance is guaranteed to be within 1-1.5%, the air release line is striven for running on the premise that the stability of equipment and the running working condition are guaranteed not to fluctuate, the air release quantity of the axial flow fan is furthest reduced, the energy loss is reduced, and the stability of the working condition of a user is guaranteed.
Drawings
FIG. 1 is a schematic illustration of an operating condition of an embodiment of the present invention;
in the figure: fold lines 1-2 are the traditional experience adjustment process; 1'-2' in the figure is the adjustment of the line pasting operation of the invention; p1 is the outlet pressure of the blower before the blower is winded; p2 is the outlet pressure of the blower after the blower is winded.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
The components of the embodiments of the present invention generally described and illustrated in the figures herein can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention.
FIG. 1 is a schematic diagram showing the operation conditions of an embodiment of the vane-adjustable axial flow compressor operation condition point-attached anti-surge line operation adjustment method, wherein the current operation point 1 is 5% away from a blow-out line, the opening of a blow-out valve is 11%, and the air quantity required for changing a blast furnace is 500m at the moment 3 /min。
First, the operating point 1 is adjusted to the operating point 1' by manual operation (or fixed wind pressure). A manual adjustment process, namely adjusting the static blade to be in a manual mode, closing the air release valve, reducing the angle of the static blade when the wind pressure is increased by 5kPa from the distance P1, and closing the air release valve when the wind pressure is reduced by 5kPa from the distance P1, and sequentially adjusting, wherein the adjustment process is as shown in-a-b-c-1';
the distance between the working point 1' and the air release line is 1.5%, the opening of the air release valve is 5%, at the moment, the air release valve can be closed by 2%, and then the air is added by 200m through the stationary blade 3 Per min, closing the air release valve by 2%, and adding air for 100m by using static blades 3 /min；
When the blast furnace is charged with air and the air is reduced, the static blade is used for reducing the air by 100m 3 Open the air valve 2% per minute, then reduce the air by 200m with static blade 3 Opening the air valve by 2% in the time of/min, wherein the adjustment process is shown as '-d-e-f-2' in figure 1;
the two operating condition points after adjustment can be seen, the angle of the second stationary blade of the adjustment method is low, the air release amount is small, and the energy-saving effect is obvious.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The static blade adjustable axial flow compressor operation working condition point sticking anti-surge line operation adjustment method is characterized in that the distance between the operation working condition point and a vent line is used as a reference for adjustment of the vent valve, under normal working conditions, the distance between the operation working condition point and the vent line is 1% -1.5% as an adjustment target, when the distance is less than 1%, the operation working condition point is operated by adopting a method of opening the vent valve by 1%, when the distance is greater than 1.5%, and when the distance is greater than 1.5%, the operation working condition point is operated by adopting a method of closing the vent valve by 1%.
2. The vane-adjustable axial flow compressor operation condition point-to-anti-surge line operation adjustment method according to claim 1, wherein the operation condition point is an intersection point of an ordinate wind pressure and an abscissa wind volume in an operation condition chart.
3. The vane-adjustable axial flow compressor operation condition point pasting anti-surge line operation adjustment method according to claim 1, wherein under the normal working condition, when a protection action electromagnetic valve is in power-off protection, a relief valve is triggered to be opened.
4. The vane-adjustable axial flow compressor operation operating point stuck anti-surge line operation adjustment method of claim 1, wherein when the operating point is less than or equal to 0% from a blow-out line, values and speeds less than 0 are proportional to opening speeds of a blow-out valve and magnitudes of valve positions.
5. The method for adjusting the operation working condition point sticking anti-surge line operation of the static blade adjustable axial flow compressor according to claim 1, wherein when the distance between the working condition point and a blow-out line is less than 1%, a static blade adding adjustment mode is adopted when the blast furnace is changed and the blast furnace is added with air quantity; when the air quantity is reduced, an integral mode of opening an air valve is adopted.
6. The method for adjusting the operation condition point sticking anti-surge line operation of the static blade adjustable axial flow compressor according to claim 1, wherein when the distance between the operation condition point and a release line is more than 1.5%, when the blast furnace changes the furnace and adds the air quantity, the method of combining the air valve closing and the static blade adjusting is adopted for operation; when the blast furnace reduces the air quantity, the combination of the static reducing blade and the air release valve is adopted for operation.
7. The vane-adjustable axial flow compressor operation operating point pasting anti-surge line operation adjustment method of claim 1, wherein under the normal operating condition, when the operating point distance from the air release line is less than or equal to 0%, the air release valve is automatically opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310753407.0A CN116576131A (en) | 2023-06-26 | 2023-06-26 | Anti-surge line operation adjusting method for static blade adjustable axial flow compressor operation working condition point pasting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310753407.0A CN116576131A (en) | 2023-06-26 | 2023-06-26 | Anti-surge line operation adjusting method for static blade adjustable axial flow compressor operation working condition point pasting |
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| Publication Number | Publication Date |
|---|---|
| CN116576131A true CN116576131A (en) | 2023-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310753407.0A Pending CN116576131A (en) | 2023-06-26 | 2023-06-26 | Anti-surge line operation adjusting method for static blade adjustable axial flow compressor operation working condition point pasting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116576131A (en) |
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2023
- 2023-06-26 CN CN202310753407.0A patent/CN116576131A/en active Pending
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