CN112200451A - Maintenance period calculation method and maintenance period calculation device for air preheater - Google Patents
Maintenance period calculation method and maintenance period calculation device for air preheater Download PDFInfo
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- 239000010687 lubricating oil Substances 0.000 claims description 29
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Abstract
The invention discloses a maintenance period calculation method and a maintenance period calculation device of an air preheater, wherein the maintenance period calculation method of the air preheater comprises the following steps: obtaining the deterioration degree of all preset parts of the air preheater; taking the maximum degradation degree as the overall degradation degree of the air preheater; and calculating the maintenance period of the air preheater according to the integral degradation degree. The method for calculating the maintenance period of the air preheater can evaluate the state of the air preheater, can carry out specific maintenance work of the air preheater in a targeted manner, reduces economic loss caused by over-maintenance and avoids fault risks caused by under-maintenance.
Description
Technical Field
The invention relates to the technical field of power station boilers, in particular to a maintenance period calculation method and a maintenance period calculation device of an air preheater.
Background
As is well known, in a power plant, an air preheater is used as an important auxiliary device of a boiler, and heats air required for combustion by using heat of flue gas at the tail part of the boiler, so that the temperature of combustion air can be increased, and the efficiency of the boiler is improved.
Aiming at the rotary air preheater, the problems of dust accumulation and blockage, low-temperature corrosion, air leakage and the like are easy to occur, and the safe and economic operation of the boiler is seriously influenced, so that the boiler needs to be stopped and maintained periodically. However, the maintenance period is difficult to determine, and the over-maintenance of good equipment can be caused by over-short selection of the maintenance period, so that the shutdown loss and the maintenance cost are increased; meanwhile, the selection of the maintenance period is too long, the maintenance of bad equipment is not timely, the heat exchange capacity of the air preheater is reduced, and a blowing-out accident is caused more seriously. From the research conditions at home and abroad, the research work on the air preheater has made some progress, but the research work is more focused on the aspects of design and monitoring, a calculation method for the overhaul period of the air preheater is lacked, and the field overhaul is difficult to guide.
Disclosure of Invention
The invention aims to provide a method and a device for calculating the overhaul period of an air preheater, which can evaluate the state of the air preheater, can carry out specific overhaul work of the air preheater in a targeted manner, reduce economic loss caused by overhauling and avoid fault risk caused by underrepair.
In order to achieve the above object, an embodiment of the present invention provides a method for calculating a repair cycle of an air preheater, including:
obtaining the deterioration degree of all preset parts of the air preheater;
taking the maximum degradation degree as the overall degradation degree of the air preheater;
and calculating the maintenance period of the air preheater according to the integral degradation degree.
Optionally, after the step of obtaining the degradation degree of all the preset components of the air preheater, the method further includes: respectively judging the state grade of each preset component according to all the degradation degrees;
and/or the presence of a gas in the gas,
after the step of determining the maximum degradation degree as the overall degradation degree of the air preheater, the method further includes: and judging the overall state grade of the air preheater according to the overall deterioration degree.
Optionally, the step of obtaining the degradation degree of all preset components of the air preheater comprises:
respectively determining the range of the acceptable values of the aging degree, the corrosion degree, the damage degree and the mechanical failure degree of each preset component of the air preheater;
according to the formula
Respectively calculating the degradation degree U of any preset component; wherein the content of the first and second substances,
u1for the degree of ageing of the pre-set part, u1-maxThe upper limit value of the aging degree of the preset component is set;
u2for the degree of corrosion of said predetermined part, u2-maxThe upper limit value of the corrosion degree of the preset part is set;
u3for the degree of breakage of said predetermined part, u3-maxThe upper limit value of the damage degree of the preset component is set;
u4to the extent of mechanical failure of said predetermined part, u4-maxIs the upper limit value of the mechanical failure degree of the preset component.
Optionally, the step of separately determining the acceptable ranges of the degree of aging, the degree of corrosion, the degree of breakage and the degree of mechanical failure of the respective predetermined components of the air preheater comprises:
aging degree u of rotary gear box of air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the rotating gearbox20, degree of breakage u of the rotary gear case3Is 0 or is in [3, 5 ]]Of the degree of mechanical failure u of the rotating gearbox4Is 0 or is in [4, 6 ]]The integer value of (1);
degree of aging u of soot blower of air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the sootblower20, degree of breakage u of the sootblower3Is 0 or is in [2, 4 ]]Of the mechanical failure degree u of the sootblower4Is 0 or is in [3, 5 ]]The integer value of (1);
degree of ageing u of bearings of air preheater1In particular to [1, 4 ]]Of the corrosion degree u of the bearing20, degree of breakage u of the bearing3Is 0 or is in [3, 5 ]]Of the mechanical failure degree u of the bearing4Is 0 or is in [4, 6 ]]The integer value of (1);
ageing degree u of T-frame of air preheater1In particular to [1, 3 ]]The corrosion degree u of the T-bar2Is 0 or is in [2, 4 ]]The damage degree u of the T-bar3Is 0 or is in [2, 4 ]]Of the mechanical failure degree u of the rack4Is 0 or is in [3, 5 ]]The integer value of (1);
ageing degree u of heating element of air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the heating element2Is 0 or is in [3, 5 ]]Of the degree of breakage u of the heating element3Is 0 or is in [4, 6 ]]Of the degree of mechanical failure u of the heating element4Is 0;
aging degree u of chamber and shell of air preheater1In particular to [1, 3 ]]Of the chamber and the housing, degree of corrosion u2Is 0 or is in [2, 4 ]]Of the chamber and the housing, and the degree of breakage u of the chamber and the housing3Is 0 or is in [3, 5 ]]Of the chamber and the housing, degree of mechanical failure u4Is 0;
aging degree u of seal of air preheater1In particular to [1, 4 ]]Of the corrosion degree u of the seal2Is 0 or is in [3, 5 ]]Of the value u, the degree of breakage u of said seal3Is 0 or is in [4, 6 ]]Of the mechanical failure degree u of the seal4Is 0;
aging degree u of driving motor of air preheater1In particular to [1, 3 ]]The corrosion degree u of the drive motor20, degree of damage u of the driving motor3Is 0 or is in [3, 5 ]]Of the mechanical failure degree u of the drive motor4Is 0 or is in [4, 6 ]]The integer value of (1);
aging degree u of lubricating oil system of air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the lubricating oil system2Is 0 or is in [2, 4 ]]The degree of damage u of the lubricating oil system3Is 0 or at[3，5]Of the lubricating oil system, degree of mechanical failure u of the lubricating oil system4Is 0 or is in [4, 6 ]]The integer value of (1);
aging u of the rotor of an air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the rotor2Is 0 or is in [3, 5 ]]The degree of damage u of the rotor3Is 0 or is in [3, 5 ]]Of the mechanical failure degree u of the rotor4Is 0 or is in [4, 6 ]]Is an integer value of (1).
Optionally, the step of calculating a service period of the air preheater according to the overall degradation degree comprises:
according to the formula
Calculating to obtain a maintenance period n, wherein the unit is year;
wherein: u shape*And N is an initial overhaul time interval, and e is a natural constant.
Optionally, the initial service interval N is 3.
The embodiment of the present invention further provides a device for calculating an overhaul period of an air preheater, including:
an acquisition unit: the air preheater is used for acquiring the degradation degree of all preset components of the air preheater;
a determination unit configured to determine the maximum degradation degree as a total degradation degree of the air preheater;
and the calculation unit is used for calculating the maintenance period of the air preheater according to the integral degradation degree.
Optionally, the obtaining unit includes:
an acquisition subunit: respectively determining the range of the acceptable values of the aging degree, the corrosion degree, the damage degree and the mechanical failure degree of each preset component of the air preheater;
a calculation subunit: according to the formula
Respectively calculate to obtain any oneA degree of degradation U of the preset component; wherein the content of the first and second substances,
u1for the degree of ageing of the pre-set part, u1-maxThe upper limit value of the aging degree of the preset component is set;
u2for the degree of corrosion of said predetermined part, u2-maxThe upper limit value of the corrosion degree of the preset part is set;
u3for the degree of breakage of said predetermined part, u3-maxThe upper limit value of the damage degree of the preset component is set;
u4to the extent of mechanical failure of said predetermined part, u4-maxIs the upper limit value of the mechanical failure degree of the preset component.
Optionally, the obtaining subunit is further configured to obtain:
aging degree u of rotary gear box of air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the rotating gearbox20, degree of breakage u of the rotary gear case3Is 0 or is in [3, 5 ]]Of the degree of mechanical failure u of the rotating gearbox4Is 0 or is in [4, 6 ]]The integer value of (1);
degree of aging u of soot blower of air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the sootblower20, degree of breakage u of the sootblower3Is 0 or is in [2, 4 ]]Of the mechanical failure degree u of the sootblower4Is 0 or is in [3, 5 ]]The integer value of (1);
degree of ageing u of bearings of air preheater1In particular to [1, 4 ]]Of the corrosion degree u of the bearing20, degree of breakage u of the bearing3Is 0 or is in [3, 5 ]]Of the mechanical failure degree u of the bearing4Is 0 or is in [4, 6 ]]The integer value of (1);
ageing degree u of T-frame of air preheater1In particular to [1, 3 ]]The corrosion degree u of the T-bar2Is 0 or is in [2, 4 ]]The integer value of (1), theDegree of breakage u of sub-frame3Is 0 or is in [2, 4 ]]Of the mechanical failure degree u of the rack4Is 0 or is in [3, 5 ]]The integer value of (1);
ageing degree u of heating element of air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the heating element2Is 0 or is in [3, 5 ]]Of the degree of breakage u of the heating element3Is 0 or is in [4, 6 ]]Of the degree of mechanical failure u of the heating element4Is 0;
aging degree u of chamber and shell of air preheater1In particular to [1, 3 ]]Of the chamber and the housing, degree of corrosion u2Is 0 or is in [2, 4 ]]Of the chamber and the housing, and the degree of breakage u of the chamber and the housing3Is 0 or is in [3, 5 ]]Of the chamber and the housing, degree of mechanical failure u4Is 0;
aging degree u of seal of air preheater1In particular to [1, 4 ]]Of the corrosion degree u of the seal2Is 0 or is in [3, 5 ]]Of the value u, the degree of breakage u of said seal3Is 0 or is in [4, 6 ]]Of the mechanical failure degree u of the seal4Is 0;
aging degree u of driving motor of air preheater1In particular to [1, 3 ]]The corrosion degree u of the drive motor20, degree of damage u of the driving motor3Is 0 or is in [3, 5 ]]Of the mechanical failure degree u of the drive motor4Is 0 or is in [4, 6 ]]The integer value of (1);
aging degree u of lubricating oil system of air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the lubricating oil system2Is 0 or is in [2, 4 ]]The degree of damage u of the lubricating oil system3Is 0 or is in [3, 5 ]]Of the lubricating oil system, degree of mechanical failure u of the lubricating oil system4Is 0 or is in [4, 6 ]]The integer value of (1);
aging u of the rotor of an air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the rotor2Is 0 or is in [3, 5 ]]The degree of damage u of the rotor3Is 0 or is in [3, 5 ]]Of the mechanical failure degree u of the rotor4Is 0 or is in [4, 6 ]]Is an integer value of (1).
Optionally, the computing unit is configured to:
according to the formula
Calculating to obtain a maintenance period n, wherein the unit is year;
wherein: u shape*And N is an initial overhaul time interval, and e is a natural constant.
Compared with the background art, the method for calculating the overhaul period of the air preheater provided by the embodiment of the invention comprises the following steps: obtaining the deterioration degree of all preset parts of the air preheater; taking the maximum degradation degree as the overall degradation degree of the air preheater; and calculating the maintenance period of the air preheater according to the integral degradation degree. The maintenance period calculation method has the following beneficial effects:
according to air heater's all running state of predetermineeing the part and appraising air heater, obtain the degradation degree of all predetermineeing the part, as air heater's whole degradation degree according to the biggest degradation degree, effectively ensure that air heater obtains the maximize attention, and calculate air heater's maintenance cycle according to whole degradation degree, so, on-the-spot operation and maintenance personnel can refer to the maintenance cycle and have the specific maintenance work of carrying out air heater that aims at, reduce the economic loss that the over-repair made and avoid the fault risk that the under-repair arouses, the equipment management level has been improved, and the device has practical meaning.
The device for calculating the overhaul period of the air preheater provided by the embodiment of the invention has the beneficial effects as described above, and the device is not described again here.
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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a flow chart of a method for calculating a repair cycle of an air preheater according to an embodiment of the present invention;
fig. 2 is a flow chart illustrating a structure of a maintenance cycle calculation apparatus for an air preheater according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and 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.
In order that those skilled in the art will better understand the disclosure, the invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The method for calculating the overhaul period of the air preheater provided by the embodiment of the invention is shown in the attached figure 1 with reference to the specification, and comprises the following steps:
s1, obtaining the deterioration degree of all preset parts of the air preheater;
s2, taking the maximum degradation degree as the overall degradation degree of the air preheater;
and S3, calculating the maintenance period of the air preheater according to the integral degradation degree.
For step S1, the predetermined components of the air preheater may be more important components of the air preheater, such as the rotary gear box, soot blower, bearings, bracket, heating element, chamber and housing, seals, drive motor, oil system and rotor of the air preheater.
The method for obtaining the degradation degree of the above-mentioned components may adopt a scoring method described later, and may also adopt a corresponding method in the prior art.
In step S2, the degradation degrees of all the preset components are compared to obtain the maximum degradation degree, that is, the most degraded component among the preset components is used as the overall degradation degree of the air preheater, the process is similar to the "barrel theory", the shortest plate in the barrel is selected to calculate the volume of the barrel, and similarly, the most degraded component is selected as the overall degradation degree of the air preheater.
And finally, in the step S3, calculating the overhaul period of the air preheater according to the selected integral degradation degree, wherein the obtained overhaul period is the most conservative, and the accident of the air preheater can be obviously avoided.
After step S1 is completed, the state levels of the preset components may be respectively determined according to the degradation degrees of all the preset components; of course, after step S2 is completed, the overall state level of the air preheater may be determined based on the overall degree of deterioration.
In step S1, the acceptable value ranges of the aging degree, the corrosion degree, the damage degree and the mechanical failure degree of each preset component of the air preheater may be determined respectively;
according to the formula
Respectively calculating the degradation degree U of any preset component; wherein the content of the first and second substances,
u1to predetermine the degree of ageing of the component, u1-maxSetting the upper limit value of the aging degree of the part;
u2to predetermine the degree of corrosion of the component, u2-maxAn upper limit value of the corrosion degree of the preset part is set;
u3to predetermine the degree of breakage of the parts, u3-maxThe upper limit value of the damage degree of the preset component is set;
u4to preset the degree of mechanical failure of the component, u4-maxAn upper limit value of the degree of mechanical failure of the component is preset.
Wherein the aging degree u of the rotary gear box of the air preheater1In particular to [1, 3 ]]Integral value of (1), degree of corrosion u of rotating gearbox20, degree of breakage u of the rotary gear case3Is 0 or is in [3, 5 ]]Integral value of (1), degree of mechanical failure u of rotating gearbox4Is 0 or is in [4, 6 ]]The integer value of (1);
degree of aging u of soot blower of air preheater1In particular to [1, 3 ]]Integral value of (1), degree of corrosion u of sootblower20, degree of soot blower breakage u3Is 0 or is in [2, 4 ]]Integral value of (1), degree of mechanical failure u of sootblower4Is 0 or is in [3, 5 ]]The integer value of (1);
degree of ageing u of bearings of air preheater1In particular to [1, 4 ]]Integral value of (1), degree of corrosion of bearing u20, degree of damage u of the bearing3Is 0 or is in [3, 5 ]]Of the integral value of (1), degree of mechanical failure u of the bearing4Is 0 or is in [4, 6 ]]The integer value of (1);
ageing degree u of T-frame of air preheater1In particular to [1, 3 ]]The integral value of (1), corrosion degree of the T-shaped scaffold u2Is 0 or is in [2, 4 ]]The integer value of (1), the degree of damage u of the T-bar3Is 0 or is in [2, 4 ]]The integral value of (1), the degree of mechanical failure u of the rack4Is 0 or is in [3, 5 ]]The integer value of (1);
ageing degree u of heating element of air preheater1In particular to [1, 3 ]]Of the value of (1), degree of corrosion u of the heating element2Is 0 or is in [3, 5 ]]Of the value of (1), degree of breakage u of the heating element3Is 0 or is in [4, 6 ]]Of the integral value of (1), degree of mechanical failure u of the heating element4Is 0;
aging degree u of chamber and shell of air preheater1In particular to [1, 3 ]]Of (1), degree of corrosion of chamber and housing u2Is 0 or is in [2, 4 ]]Of (1), degree of damage u of the chamber and the housing3Is 0 or is in [3, 5 ]]Of the value of (1), degree of mechanical failure u of the chamber and housing4Is 0;
aging degree u of seal of air preheater1In particular to [1, 4 ]]Of (1), corrosion degree of seal u2Is 0 or is in [3, 5 ]]Of (1), degree of breakage u of seal3Is 0 or is in [4, 6 ]]Of the integer value of (1), degree of mechanical failure u of the seal4Is 0;
aging degree u of driving motor of air preheater1In particular to [1, 3 ]]Integral value of (1), degree of corrosion of drive motor u20, degree of damage u of the driving motor3Is 0 or is in [3, 5 ]]Of the integral value of (1), degree of mechanical failure u of the drive motor4Is 0 or is in [4, 6 ]]The integer value of (1);
aging degree u of lubricating oil system of air preheater1In particular to [1, 3 ]]Integral value of (1), degree of corrosion u of lubricating oil system2Is 0 or is in [2, 4 ]]Integral value of (1), degree of damage u of lubricating oil system3Is 0 or is in [3, 5 ]]Integral value of (1), degree of mechanical failure u of lubricating oil system4Is 0 or is in [4, 6 ]]The integer value of (1);
aging u of the rotor of an air preheater1In particular to [1, 3 ]]Of the integer value of (1), degree of corrosion u of the rotor2Is 0 or is in [3, 5 ]]The integral value of (1), the degree of damage u of the rotor3Is 0 or is in [3, 5 ]]Of the value of (1), degree of mechanical failure u of the rotor4Is 0 or is in [4, 6 ]]Is an integer value of (1).
For convenience in selecting values, reference may be made to table one below:
table one:
| aging of | Etching of | Breakage of | Mechanical failure | |
| Rotary gear box | 1-3 | / | 0，3-5 | 0，4-6 |
| Soot blower | 1-3 | / | 0，2-4 | 0，3-5 |
| Bearing assembly | 1-4 | / | 0，3-5 | 0，4-6 |
| T-shaped rack | 1-3 | 0，2-4 | 0，2-4 | 0，3-5 |
| Heating element | 1-3 | 0，3-5 | 0，4-6 | / |
| Chamber and housing | 1-3 | 0，2-4 | 0，3-5 | / |
| Seal for a motor vehicle | 1-4 | 0，3-5 | 0，4-6 | / |
| Driving motor | 1-3 | / | 0，3-5 | 0，4-6 |
| Lubricating oil system | 1-3 | 0，2-4 | 0，3-5 | 0，4-6 |
| Rotor | 1-3 | 0，3-5 | 0，3-5 | 0，4-6 |
It can be seen that according to different importance degrees of each part of the air preheater, a state evaluation index set can be obtained according to part classification, and indexes are divided into four dimensions of aging, corrosion, damage and mechanical failure, wherein the corresponding specific indexes of each dimension are as follows:
aging: wear, dirt, lack of lubrication, loosening, creep;
and (3) corrosion: excessive ammonia slip, soot blow erosion, cold end acid corrosion;
and (3) breakage: film thinning, fastener failure, leakage, fracture, plug gauge, fracture, bending or cracking;
mechanical failure: improper motion, loss of torque, failure, seizure, failure of the drive;
that is, the different dimensions (aging, corrosion, damage, and mechanical failure) need to be scored according to actual conditions, the more serious the degradation is, the higher the score is, the lowest the aging index is 1, and the corrosion, wear, and mechanical failure scoring interval is the table one.
Then by the formula
And respectively calculating the degradation degree U of any preset part.
Meanwhile, the mode of judging the state grade of each component according to the degradation degree of each component can be specifically as follows:
when U is less than or equal to 0.3, the corresponding component is in a normal state.
When 0.3< U ≦ 0.6, the corresponding component is in a state requiring attention.
When 0.6< U, the corresponding component is in an abnormal state.
In addition, the overall state grade of the air preheater is judged according to the overall deterioration degree, and the judgment criteria can be specifically as follows:
and when the U is less than or equal to 0.3, the air preheater is in a normal state, and normal inspection is recommended.
The air preheater is recommended to enhance monitoring when 0.3< U ≦ 0.6.
When 0.6< U, the air preheater is in an abnormal state, close attention is recommended.
For example: the vertical air preheater with a certain type is put into operation for 3 years, and the states of all the components are shown in a table two.
Watch two
And then judging the deterioration condition of the four-dimensional indexes of the air preheater, and combining the table to score each index to obtain a table III.
Watch III
Then, the status levels of the respective components of the air preheater can be judged, and since the deterioration degree of each component is less than 0.3, all the components of the apparatus are normal. The air preheater overall deterioration degree is calculated according to the above step S2, and the overall deterioration degree is 0.23 as the maximum deterioration degree. The overall state grade of the air preheater can be judged, the overall deterioration degree is less than 0.3, the overall evaluation result is normal, the monitoring is not required to be strengthened, and the normal inspection is recommended.
The step of calculating the repair cycle of the air preheater according to the overall deterioration degree includes:
according to the formula
Calculating to obtain a maintenance period n, wherein the unit is year;
wherein: u shape*And N is an initial overhaul time interval, and e is a natural constant.
The initial overhaul time interval N takes the value 3.
Continuing with the above example, substituting the overall deterioration degree of 0.23 into the above formula, when the initial maintenance period takes 3, n is 3.5, i.e. it is recommended to conduct maintenance 6 months after 3 years.
Through the method, the state of the air preheater can be evaluated according to the calculated maintenance period of the air preheater, specific maintenance work of the air preheater can be carried out accordingly, economic loss caused by over-maintenance is reduced, and fault risk caused by under-maintenance is avoided.
The embodiment of the present invention further provides a maintenance cycle calculating device for an air preheater, which is shown in fig. 2 with reference to the specification, and includes:
the acquisition unit 101: the air preheater is used for acquiring the degradation degree of all preset components of the air preheater;
a judging unit 102, configured to use the maximum degradation degree as the overall degradation degree of the air preheater;
and the calculating unit 103 is used for calculating the maintenance period of the air preheater according to the overall degradation degree.
The specific operation mode of the maintenance period calculation device of the air preheater can refer to the maintenance period calculation method of the air preheater described above, and will not be expanded here.
The above acquisition unit 101 includes:
an acquisition subunit: respectively determining the range of the acceptable values of the aging degree, the corrosion degree, the damage degree and the mechanical failure degree of each preset component of the air preheater;
a calculation subunit: according to the formula
Respectively calculating the degradation degree U of any preset component; wherein the content of the first and second substances,
u1to predetermine the degree of ageing of the component, u1-maxSetting the upper limit value of the aging degree of the part;
u2to predetermine the degree of corrosion of the component, u2-maxAn upper limit value of the corrosion degree of the preset part is set;
u3to predetermine the degree of breakage of the parts, u3-maxThe upper limit value of the damage degree of the preset component is set;
u4to preset the degree of mechanical failure of the component, u4-maxAn upper limit value of the degree of mechanical failure of the component is preset.
An obtaining subunit further configured to obtain:
aging degree u of rotary gear box of air preheater1In particular to [1, 3 ]]Integral value of (1), degree of corrosion of rotating gearboxu20, degree of breakage u of the rotary gear case3Is 0 or is in [3, 5 ]]Integral value of (1), degree of mechanical failure u of rotating gearbox4Is 0 or is in [4, 6 ]]The integer value of (1);
degree of aging u of soot blower of air preheater1In particular to [1, 3 ]]Integral value of (1), degree of corrosion u of sootblower20, degree of soot blower breakage u3Is 0 or is in [2, 4 ]]Integral value of (1), degree of mechanical failure u of sootblower4Is 0 or is in [3, 5 ]]The integer value of (1);
degree of ageing u of bearings of air preheater1In particular to [1, 4 ]]Integral value of (1), degree of corrosion of bearing u20, degree of damage u of the bearing3Is 0 or is in [3, 5 ]]Of the integral value of (1), degree of mechanical failure u of the bearing4Is 0 or is in [4, 6 ]]The integer value of (1);
ageing degree u of T-frame of air preheater1In particular to [1, 3 ]]The integral value of (1), corrosion degree of the T-shaped scaffold u2Is 0 or is in [2, 4 ]]The integer value of (1), the degree of damage u of the T-bar3Is 0 or is in [2, 4 ]]The integral value of (1), the degree of mechanical failure u of the rack4Is 0 or is in [3, 5 ]]The integer value of (1);
ageing degree u of heating element of air preheater1In particular to [1, 3 ]]Of the value of (1), degree of corrosion u of the heating element2Is 0 or is in [3, 5 ]]Of the value of (1), degree of breakage u of the heating element3Is 0 or is in [4, 6 ]]Of the integral value of (1), degree of mechanical failure u of the heating element4Is 0;
aging degree u of chamber and shell of air preheater1In particular to [1, 3 ]]Of (1), degree of corrosion of chamber and housing u2Is 0 or is in [2, 4 ]]Of (1), degree of damage u of the chamber and the housing3Is 0 or is in [3, 5 ]]Of the value of (1), degree of mechanical failure u of the chamber and housing4Is 0;
aging degree u of seal of air preheater1In particular to [1, 4 ]]Of (1), corrosion degree of seal u2Is 0 orIs in [3, 5 ]]Of (1), degree of breakage u of seal3Is 0 or is in [4, 6 ]]Of the integer value of (1), degree of mechanical failure u of the seal4Is 0;
aging degree u of driving motor of air preheater1In particular to [1, 3 ]]Integral value of (1), degree of corrosion of drive motor u20, degree of damage u of the driving motor3Is 0 or is in [3, 5 ]]Of the integral value of (1), degree of mechanical failure u of the drive motor4Is 0 or is in [4, 6 ]]The integer value of (1);
aging degree u of lubricating oil system of air preheater1In particular to [1, 3 ]]Integral value of (1), degree of corrosion u of lubricating oil system2Is 0 or is in [2, 4 ]]Integral value of (1), degree of damage u of lubricating oil system3Is 0 or is in [3, 5 ]]Integral value of (1), degree of mechanical failure u of lubricating oil system4Is 0 or is in [4, 6 ]]The integer value of (1);
aging u of the rotor of an air preheater1In particular to [1, 3 ]]Of the integer value of (1), degree of corrosion u of the rotor2Is 0 or is in [3, 5 ]]The integral value of (1), the degree of damage u of the rotor3Is 0 or is in [3, 5 ]]Of the value of (1), degree of mechanical failure u of the rotor4Is 0 or is in [4, 6 ]]Is an integer value of (1).
The computing unit is to:
according to the formula
Calculating to obtain a maintenance period n, wherein the unit is year;
wherein: u shape*And N is an initial overhaul time interval, and e is a natural constant.
The method and the device for calculating the overhaul period of the air preheater provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A maintenance cycle calculation method of an air preheater is characterized by comprising the following steps:
obtaining the deterioration degree of all preset parts of the air preheater;
taking the maximum degradation degree as the overall degradation degree of the air preheater;
and calculating the maintenance period of the air preheater according to the integral degradation degree.
2. A method for calculating a service cycle of an air preheater as recited in claim 1, wherein said step of obtaining the degradation degree of all the preset components of the air preheater further comprises: respectively judging the state grade of each preset component according to all the degradation degrees;
and/or the presence of a gas in the gas,
after the step of determining the maximum degradation degree as the overall degradation degree of the air preheater, the method further includes: and judging the overall state grade of the air preheater according to the overall deterioration degree.
3. A service cycle calculation method for an air preheater as recited in claim 1, wherein said step of obtaining the degradation degree of all the preset components of the air preheater comprises:
respectively determining the range of the acceptable values of the aging degree, the corrosion degree, the damage degree and the mechanical failure degree of each preset component of the air preheater;
according to the formula
Respectively calculating the degradation degree U of any preset component; wherein the content of the first and second substances,
u1for the degree of ageing of the pre-set part, u1-maxIs the preset partAn upper limit value of the degree of aging of the part;
u2for the degree of corrosion of said predetermined part, u2-maxThe upper limit value of the corrosion degree of the preset part is set;
u3for the degree of breakage of said predetermined part, u3-maxThe upper limit value of the damage degree of the preset component is set;
u4to the extent of mechanical failure of said predetermined part, u4-maxIs the upper limit value of the mechanical failure degree of the preset component.
4. A service cycle calculation method for an air preheater as recited in claim 3, wherein said step of separately determining ranges of acceptable values for the degree of degradation, the degree of corrosion, the degree of breakage and the degree of mechanical failure of each of the preset components of the air preheater comprises:
aging degree u of rotary gear box of air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the rotating gearbox20, degree of breakage u of the rotary gear case3Is 0 or is in [3, 5 ]]Of the degree of mechanical failure u of the rotating gearbox4Is 0 or is in [4, 6 ]]The integer value of (1);
degree of aging u of soot blower of air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the sootblower20, degree of breakage u of the sootblower3Is 0 or is in [2, 4 ]]Of the mechanical failure degree u of the sootblower4Is 0 or is in [3, 5 ]]The integer value of (1);
degree of ageing u of bearings of air preheater1In particular to [1, 4 ]]Of the corrosion degree u of the bearing20, degree of breakage u of the bearing3Is 0 or is in [3, 5 ]]Of the mechanical failure degree u of the bearing4Is 0 or is in [4, 6 ]]The integer value of (1);
ageing degree u of T-frame of air preheater1In particular to [1, 3 ]]The rotten value of said T-cell scaffoldDegree of corrosion u2Is 0 or is in [2, 4 ]]The damage degree u of the T-bar3Is 0 or is in [2, 4 ]]Of the mechanical failure degree u of the rack4Is 0 or is in [3, 5 ]]The integer value of (1);
ageing degree u of heating element of air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the heating element2Is 0 or is in [3, 5 ]]Of the degree of breakage u of the heating element3Is 0 or is in [4, 6 ]]Of the degree of mechanical failure u of the heating element4Is 0;
aging degree u of chamber and shell of air preheater1In particular to [1, 3 ]]Of the chamber and the housing, degree of corrosion u2Is 0 or is in [2, 4 ]]Of the chamber and the housing, and the degree of breakage u of the chamber and the housing3Is 0 or is in [3, 5 ]]Of the chamber and the housing, degree of mechanical failure u4Is 0;
aging degree u of seal of air preheater1In particular to [1, 4 ]]Of the corrosion degree u of the seal2Is 0 or is in [3, 5 ]]Of the value u, the degree of breakage u of said seal3Is 0 or is in [4, 6 ]]Of the mechanical failure degree u of the seal4Is 0;
aging degree u of driving motor of air preheater1In particular to [1, 3 ]]The corrosion degree u of the drive motor20, degree of damage u of the driving motor3Is 0 or is in [3, 5 ]]Of the mechanical failure degree u of the drive motor4Is 0 or is in [4, 6 ]]The integer value of (1);
aging degree u of lubricating oil system of air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the lubricating oil system2Is 0 or is in [2, 4 ]]The degree of damage u of the lubricating oil system3Is 0 or is in [3, 5 ]]Of the lubricating oil system, degree of mechanical failure u of the lubricating oil system4Is 0 or is in [4, 6 ]]The integer value of (1);
aging u of the rotor of an air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the rotor2Is 0 or is in [3, 5 ]]The degree of damage u of the rotor3Is 0 or is in [3, 5 ]]Of the mechanical failure degree u of the rotor4Is 0 or is in [4, 6 ]]Is an integer value of (1).
5. A method of calculating a service period of an air preheater as recited in claim 4, wherein said step of calculating a service period of said air preheater based on the overall degradation comprises:
according to the formula
Calculating to obtain a maintenance period n, wherein the unit is year;
wherein: u shape*And N is an initial overhaul time interval, and e is a natural constant.
6. A method of calculating a service period for an air preheater as recited in claim 5 wherein the initial service interval N is 3.
7. An air preheater maintenance cycle calculation apparatus, comprising:
an acquisition unit: the air preheater is used for acquiring the degradation degree of all preset components of the air preheater;
a determination unit configured to determine the maximum degradation degree as a total degradation degree of the air preheater;
and the calculation unit is used for calculating the maintenance period of the air preheater according to the integral degradation degree.
8. A service cycle calculation apparatus for an air preheater as recited in claim 7, wherein said acquisition unit comprises:
an acquisition subunit: respectively determining the range of the acceptable values of the aging degree, the corrosion degree, the damage degree and the mechanical failure degree of each preset component of the air preheater;
a calculation subunit: according to the formula
Respectively calculating the degradation degree U of any preset component; wherein the content of the first and second substances,
u1for the degree of ageing of the pre-set part, u1-maxThe upper limit value of the aging degree of the preset component is set;
u2for the degree of corrosion of said predetermined part, u2-maxThe upper limit value of the corrosion degree of the preset part is set;
u3for the degree of breakage of said predetermined part, u3-maxThe upper limit value of the damage degree of the preset component is set;
u4to the extent of mechanical failure of said predetermined part, u4-maxIs the upper limit value of the mechanical failure degree of the preset component.
9. A service cycle calculation apparatus for an air preheater as recited in claim 8, wherein said obtaining subunit is further configured to obtain:
aging degree u of rotary gear box of air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the rotating gearbox20, degree of breakage u of the rotary gear case3Is 0 or is in [3, 5 ]]Of the degree of mechanical failure u of the rotating gearbox4Is 0 or is in [4, 6 ]]The integer value of (1);
degree of aging u of soot blower of air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the sootblower20, degree of breakage u of the sootblower3Is 0 or is in [2, 4 ]]Of the mechanical failure degree u of the sootblower4Is 0 or is in [3, 5 ]]The integer value of (1);
degree of ageing u of bearings of air preheater1In particular to [1, 4 ]]The integer value of (1), anddegree of corrosion u of said bearing20, degree of breakage u of the bearing3Is 0 or is in [3, 5 ]]Of the mechanical failure degree u of the bearing4Is 0 or is in [4, 6 ]]The integer value of (1);
ageing degree u of T-frame of air preheater1In particular to [1, 3 ]]The corrosion degree u of the T-bar2Is 0 or is in [2, 4 ]]The damage degree u of the T-bar3Is 0 or is in [2, 4 ]]Of the mechanical failure degree u of the rack4Is 0 or is in [3, 5 ]]The integer value of (1);
ageing degree u of heating element of air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the heating element2Is 0 or is in [3, 5 ]]Of the degree of breakage u of the heating element3Is 0 or is in [4, 6 ]]Of the degree of mechanical failure u of the heating element4Is 0;
aging degree u of chamber and shell of air preheater1In particular to [1, 3 ]]Of the chamber and the housing, degree of corrosion u2Is 0 or is in [2, 4 ]]Of the chamber and the housing, and the degree of breakage u of the chamber and the housing3Is 0 or is in [3, 5 ]]Of the chamber and the housing, degree of mechanical failure u4Is 0;
aging degree u of seal of air preheater1In particular to [1, 4 ]]Of the corrosion degree u of the seal2Is 0 or is in [3, 5 ]]Of the value u, the degree of breakage u of said seal3Is 0 or is in [4, 6 ]]Of the mechanical failure degree u of the seal4Is 0;
aging degree u of driving motor of air preheater1In particular to [1, 3 ]]The corrosion degree u of the drive motor20, degree of damage u of the driving motor3Is 0 or is in [3, 5 ]]Of the mechanical failure degree u of the drive motor4Is 0 or is in [4, 6 ]]The integer value of (1);
lubricating oil system of air preheaterDegree of aging u1In particular to [1, 3 ]]Of the corrosion degree u of the lubricating oil system2Is 0 or is in [2, 4 ]]The degree of damage u of the lubricating oil system3Is 0 or is in [3, 5 ]]Of the lubricating oil system, degree of mechanical failure u of the lubricating oil system4Is 0 or is in [4, 6 ]]The integer value of (1);
aging u of the rotor of an air preheater1In particular to [1, 3 ]]Of the corrosion degree u of the rotor2Is 0 or is in [3, 5 ]]The degree of damage u of the rotor3Is 0 or is in [3, 5 ]]Of the mechanical failure degree u of the rotor4Is 0 or is in [4, 6 ]]Is an integer value of (1).
10. A service cycle calculation apparatus for an air preheater as recited in claim 9, wherein said calculation unit is configured to:
according to the formula
Calculating to obtain a maintenance period n, wherein the unit is year;
wherein: u shape*And N is an initial overhaul time interval, and e is a natural constant.
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