CN101571573B - Method for testing power generating performance of waste heat of cement kiln - Google Patents
Method for testing power generating performance of waste heat of cement kiln Download PDFInfo
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- CN101571573B CN101571573B CN200810196543A CN200810196543A CN101571573B CN 101571573 B CN101571573 B CN 101571573B CN 200810196543 A CN200810196543 A CN 200810196543A CN 200810196543 A CN200810196543 A CN 200810196543A CN 101571573 B CN101571573 B CN 101571573B
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Abstract
The invention discloses a method for testing power generating performance of waste heat of a cement kiln, and belongs to the field of waste heat power generation of a cement kiln. The method comprisesthe following steps of: a) detecting compositions of waste gas entering a boiler, and working out an enthalpy value of the waste gas; b) working out a flow rate of the waste gas; c) working out main steam flow coefficients and main steam temperature correction coefficients of a steam turbine under different operating conditions; d) working out main steam evaporation capacity and temperature of the boiler at a selective operating condition point, and working out a boiler correction coefficient of another boiler when one boiler is ensured to be operated under a design value; e) building up a cooling water correction curve according to the cooling capacity of a steam condenser, and working out a cooling water correction coefficient by measuring a cooling water temperature on the spot; and f)working out a performance test power of a generator through the boiler correction value and the cooling water correction coefficient. The technical proposal of the invention has the advantages of acc urately realizing the power generating performance test of a waste heat generating system of the cement kiln, and correctly reflecting the overall power generating performance of a waste heat generating set of the cement kiln.
Description
Technical field
The present invention relates to cement kiln pure low-temperature cogeneration system field, more particularly, the present invention relates to a kind of performance test methods of cement kiln residual heat generating.
Background technology
Domestic to cement kiln pure low-temperature cogeneration system; The performance test methods that the complete detailed reflection total system of one cover is not arranged as yet; And just simple every unit is carried out performance test; Can not reflect system performance testing, this method is primarily aimed at factors such as boiler load fluctuates greatly in the cement kiln waste-heat power generation system different with large-scale unit, unit load fluctuation of service, the methodology of being studied.
Summary of the invention
A kind of method for testing power generating performance of waste heat of cement kiln of the present invention; Its technical problem underlying that will solve be: for the power generation performance test of cement kiln waste-heat power generation system provides perfect, an accurate performance test methods; Through method of testing of the present invention; The staff that can instruct electricity generation system guarantees that according to method of testing of the present invention unit moves under maximum output state.
To top technical matters, the technical scheme that the present invention adopts is:
The present invention is a kind of method for testing power generating performance of waste heat of cement kiln, and described method for testing power generating performance of waste heat of cement kiln is:
A) detect the exhaust gas constituents that gets into boiler, calculate the waste gas enthalpy;
B) calculate exhaust gas flow;
C) calculate different operating mode situation tubine main steam flow coefficients, main steam temperature correction factor;
D) select certain exhaust gas flow based on calculating exhaust gas flow and design discharge; Through the boiler corrected Calculation; Calculate main steam evaporation capacity and the temperature of boiler at above selected operating point; Guarantee a boiler under the situation of design load operation, calculating the boiler correction value of another boiler based on boiler main steam flow and temperature correction coefficient;
E) according to condenser performance curve, Steam Turbine Thermal Property curve, set up the chilled water fair curve,, calculate the chilled water correction factor through the actual measurement cooling water temperature;
The enthalpy computing method of described waste gas are: detect the exhaust gas constituents that cement kiln gets into cogeneration kiln hood boiler and kiln tail boiler, according to the ratio of waste gas, dust than and the enthalpy of temperature computation waste gas, exhaust gas constituents is by N
2, O
2, CO
2, H
2O and dust are formed, and the tester should carry out sampling and testing, draw waste gas enthalpy curve according to exhaust gas constituents.
It is that water absorbed in the import and export enthalpy, performance test data through waste gas the heat and the thermal loss of boiler calculate the waste gas normal flow that described exhaust gas flow calculates, and concrete computing formula is:
The PH boiler is not with economizer
AQC boiler and PH boiler band economizer
The computing method of described steam turbine main steam flow coefficient, main steam temperature correction factor are:
A) carry the thermodynamic property curve according to steam turbine producer, calculate steam turbine main steam flow coefficient, main steam temperature correction factor under different operating mode situation.
B) according to calculating exhaust gas flow and design discharge is selected certain exhaust gas flow; Through the boiler corrected Calculation; Calculate main steam evaporation capacity and the temperature of boiler at selected operating point; Guarantee a boiler under the situation of design load operation, calculating the boiler correction value of another boiler according to boiler main steam flow and temperature correction coefficient.
Described chilled water correction factor through the actual measurement cooling water temperature, calculates the chilled water correction factor according to condenser performance curve, Steam Turbine Thermal Property curve.
Described generator performance measured power calculates through boiler correction value and chilled water correction factor, and its computing formula is: X=(Xm-A-B) * 1/F.
Adopt technical scheme of the present invention, can be perfect, accurately realize the power generation performance test of cement kiln waste-heat power generation system; Through method of testing of the present invention, the staff that can instruct electricity generation system guarantees that according to method of testing of the present invention unit moves under maximum output state; And the data that method of testing of the present invention draws; Deviation is very low, about 25%, therefore can correctly reflect the whole generating performance of cement kiln waste-heat power generation system unit.
Description of drawings
Make brief description in the face of the expressed content of each width of cloth accompanying drawing in the instructions of the present invention and the mark among the figure down:
Fig. 1 is a PH boiler waste gas flow performance curve map of the present invention;
Fig. 2 is an AQC boiler waste gas flow performance curve map of the present invention;
Fig. 3 is the performance test figure of PH boiler of the present invention;
Fig. 4 is the performance test figure of AQC boiler of the present invention;
Fig. 5 is a host performance test pattern of the present invention;
Fig. 6 is subsidiary engine performance test figure of the present invention;
Fig. 7 is the waste gas heat content curve map of PH boiler of the present invention;
Fig. 8 is the waste gas heat content curve map of AQC boiler of the present invention;
Fig. 9 is cooling water temperature test curve figure of the present invention;
Embodiment
Contrast accompanying drawing below; Through the description to embodiment, the effect of mutual alignment between the shape of specific embodiments of the invention such as related each member, structure, the each several part and annexation, each several part and principle of work etc. are done further to specify:
Shown in accompanying drawing, a kind of method for testing power generating performance of waste heat of cement kiln of the present invention, described method for testing power generating performance of waste heat of cement kiln is:
A) detect the exhaust gas constituents that gets into boiler, calculate the waste gas enthalpy;
B) calculate exhaust gas flow;
C) calculate different operating mode situation tubine main steam flow coefficients, main steam temperature correction factor;
D) select certain exhaust gas flow based on calculating exhaust gas flow and design discharge; Through the boiler corrected Calculation; Calculate main steam evaporation capacity and the temperature of boiler at above selected operating point; Guarantee a boiler under the situation of design load operation, calculating the boiler correction value of another boiler based on boiler main steam flow and temperature correction coefficient;
E) according to the condenser cooling power, set up the chilled water fair curve, through the actual measurement cooling water temperature, calculate the chilled water correction factor;
The enthalpy computing method of described waste gas are: detect the exhaust gas constituents that cement kiln gets into cogeneration kiln hood boiler and kiln tail boiler, according to the ratio of waste gas, dust than and the enthalpy of temperature computation waste gas, exhaust gas constituents is by N
2, O
2, CO
2, H
2O and dust are formed, and the tester should carry out sampling and testing, draw waste gas enthalpy curve according to exhaust gas constituents.
It is that water absorbed in the import and export enthalpy, performance test data through waste gas the heat and the thermal loss of boiler calculate the waste gas normal flow that described exhaust gas flow calculates, and concrete formula please with reference to computing formula is:
The PH boiler is not with economizer
AQC boiler and PH boiler band economizer
The implication of each symbology is in the formula:
The implication of each symbology is in the formula:
The computing method of described steam turbine main steam flow coefficient, main steam temperature correction factor are:
A) carry the thermodynamic property curve according to steam turbine producer, calculate steam turbine main steam flow coefficient, main steam temperature correction factor under different operating mode situation.
B) according to calculating exhaust gas flow and design discharge is selected certain exhaust gas flow; Through the boiler corrected Calculation; Calculate main steam evaporation capacity and the temperature of boiler at above selected operating point; Guarantee a boiler under the situation of design load operation, calculating the boiler correction value of another boiler according to boiler main steam flow and temperature correction coefficient.
Described chilled water correction factor through the actual measurement cooling water temperature, calculates the chilled water correction factor according to condenser performance curve, Steam Turbine Thermal Property curve.
Described generator performance measured power calculates through boiler correction value and chilled water correction factor, and its computing formula is: X=(Xm-A-B) * 1/F [kW.
The implication of each symbology is in the formula:
X generator output rated output
Xm generator output measured power
A PH boiler correction value
B AQC boiler correction value
F chilled water correction factor
Through above step, can test out the power generation performance of afterheat generating system.
Through to systematic research of cement kiln pure low-temperature cogeneration and test, afterheat generating system performance test methods of the present invention can reflect whole machine set system performance, adapts to cement kiln waste-heat power generation system.
Through adopting power generation performance method of testing checking of the present invention, under the situation that keeps kiln operation coal consumption not increase, therefore the deviation of final properties test result can reflect the real conditions of cement kiln waste-heat power generation system basically exactly about 2%.
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; Obviously the concrete realization of the present invention is not subjected to the restriction of above-mentioned concrete mode; As long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; Or without change design of the present invention and technical scheme directly applied to other occasions, all fall within the scope of protection of the present invention.
Claims (1)
1. method for testing power generating performance of waste heat of cement kiln, it is characterized in that: described method for testing power generating performance of waste heat of cement kiln is:
A) detect the exhaust gas constituents that gets into boiler, calculate the waste gas enthalpy; The enthalpy computing method of described waste gas are: detect the exhaust gas constituents that cement kiln gets into cogeneration kiln hood boiler and kiln tail boiler, according to the ratio of waste gas, dust than and the enthalpy of temperature computation waste gas, exhaust gas constituents is by N
2, O
2, CO
2, H
2O and dust are formed, and the tester should carry out sampling and testing, draw waste gas enthalpy curve according to exhaust gas constituents;
B) calculate exhaust gas flow; It is that water absorbed in the import and export enthalpy, performance test data through waste gas the heat and the thermal loss of boiler calculate exhaust gas flow that described exhaust gas flow calculates, and concrete computing formula is:
The PH boiler is not with economizer
AQC boiler and PH boiler band economizer
The implication of each symbology is in the formula:
Vg: exhaust gas flow [Nm
3/ h];
F: superheater exports specified steam flow [kg/h];
F ": the economizer specified feedwater flow [kg/h] that enters the mouth;
Jg
1: boiler inlet dust-laden exhaust gas heat content [kJ/Nm
3];
Jg
2: boiler export dust-laden exhaust gas heat content [kJ/Nm
3];
h
0: economizer inlet feedwater heat content [kJ/kg];
h
1: boiler inlet feedwater heat content [kJ/kg];
h
2: boiler export steam enthalpy [kJ/kg];
L: boiler outer surface heat loss [kJ/h];
The implication of each symbology is in the formula:
K: heat transfer coefficient (K=4.186 * 10kJ/m2h ℃);
A1: boiler suction casing surface area [m2];
A2: boiler shell surface area [m2];
A3: the boiler export surface of shell amasss [m2];
A4: pipe arrangement surface area [m2];
T1: boiler suction casing surface temperature [℃];
T2: the boiler shell surface temperature [℃];
T3: the boiler export casing surface temperature [℃];
T4: the pipe arrangement surface temperature [℃];
T0: atmospheric temperature [℃];
C) obtain at different operating mode situation tubine main steam flow coefficients, main steam temperature correction factor;
The computing method of described steam turbine main steam flow coefficient, main steam temperature correction factor are:
I) carry the thermodynamic property curve according to steam turbine producer, obtain steam turbine main steam flow coefficient, main steam temperature correction factor under different operating mode situation;
II) select certain exhaust gas flow based on calculating exhaust gas flow and design discharge; Through the boiler corrected Calculation; Calculate main steam evaporation capacity and the temperature of boiler at above selected operating point; Guarantee a boiler under the situation of design load operation, calculating the boiler correction value of another boiler based on boiler main steam flow and temperature correction coefficient;
D) according to the condenser cooling power, the Steam Turbine Thermal Property curve is set up the chilled water fair curve, through the actual measurement cooling water temperature, obtains the chilled water correction factor; Described chilled water correction factor is according to the condenser cooling power, and the condenser performance curve that provides through condenser producer according to the actual exhaust steam flow of steam turbine, actual measurement cooling water temperature, turbine back pressure curve extremely, is obtained out the chilled water correction factor;
E) described generator performance measured power calculates through boiler correction value and chilled water correction factor:
Described generator performance measured power calculates through boiler correction value and chilled water correction factor, and its computing formula is: X=(Xm-A-B) * 1/F;
The implication of each symbology is in the formula:
X: generator output rated output;
Xm: generator output measured power;
The A:PH boiler correction value;
The B:AQC boiler correction value;
F: chilled water correction factor.
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|---|---|---|---|
| CN200810196543A CN101571573B (en) | 2008-09-10 | 2008-09-10 | Method for testing power generating performance of waste heat of cement kiln |
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| CN200810196543A CN101571573B (en) | 2008-09-10 | 2008-09-10 | Method for testing power generating performance of waste heat of cement kiln |
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| CN101571573B true CN101571573B (en) | 2012-10-24 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084835A (en) * | 1992-09-30 | 1994-04-06 | 陈茂林 | Warm generating kiln external grog refractory system in the high low-temperature prewarming |
| CN1146546A (en) * | 1996-07-15 | 1997-04-02 | 中国建筑材料科学研究院 | External decomposition technology for waste heat generating technology of cement kiln |
| CN1635324A (en) * | 2004-06-21 | 2005-07-06 | 孙义燊 | Power generation system and method utilizing exhaust gas waste heat from cement predecomposition kiln |
-
2008
- 2008-09-10 CN CN200810196543A patent/CN101571573B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1084835A (en) * | 1992-09-30 | 1994-04-06 | 陈茂林 | Warm generating kiln external grog refractory system in the high low-temperature prewarming |
| CN1146546A (en) * | 1996-07-15 | 1997-04-02 | 中国建筑材料科学研究院 | External decomposition technology for waste heat generating technology of cement kiln |
| CN1635324A (en) * | 2004-06-21 | 2005-07-06 | 孙义燊 | Power generation system and method utilizing exhaust gas waste heat from cement predecomposition kiln |
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| CN101571573A (en) | 2009-11-04 |
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