CN104021273A - Method for evaluating influences of denitration system on coal consumption of coal-fired unit - Google Patents
Method for evaluating influences of denitration system on coal consumption of coal-fired unit Download PDFInfo
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- CN104021273A CN104021273A CN201410193291.0A CN201410193291A CN104021273A CN 104021273 A CN104021273 A CN 104021273A CN 201410193291 A CN201410193291 A CN 201410193291A CN 104021273 A CN104021273 A CN 104021273A
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Abstract
The invention provides a method for evaluating influences of a denitration system on coal consumption of a coal-fired unit. The method includes the steps that S1, flue gas flow of an inlet section and outlet section (1, 2) of the denitration system is measured; S2, the flue gas temperature of the sections (1, 2) and the environmental temperature (Ta) are measured; S3, power consumption Wxs of a dilution fan is measured; S4, system air leakage delta Q (delta Q = Q2-Q1) is calculated out; S5, flue gas enthalpy value of the sections (1, 2) is calculated, and delta H and air enthalpy value Ha are calculated; S6, the changed value caused by the denitration system to input energy of an original thermal system is Q1*delta H+delta Q*(H2-Ha)+Wxs; numerical units are unified to obtain the influencing numerical value of the denitration system on the coal consumption of the coal-fired unit. The method is simple, and easy to operate, and provides more accurate power supply coal consumption calculation of the coal-fired unit; the denitration system has been widely installed in coal-fired power plants, the defect that influences of a new denitration environmental protection device on machine unit energy consumption are not considered in a traditional calculating method is overcome, and disputes caused by less rigorous calculation in the process of acceptance check of devices can also be reduced.
Description
Technical field
The present invention relates to a kind of coal-fired unit environmental protection equipment to units consumption impact assessment method, in particular to a kind of denitrating system to coal-fired unit coal consumption impact assessment method.
Background technology
Along with the promulgation of the air pollution emission standard > > of new environmental protection standard < < thermal power plant of country (GB13223-2011), coal-burning power plant has increased selective catalysis removal of nitrogen oxide system (being called for short " denitrating system ") at present successively in original system.And in original coal-fired unit net coal consumption rate computing method, do not consider this part impact, denitrating system is mainly because smoke gas flow is through denitrating system on the impact of unit net coal consumption rate, there is variation in the flow of flue gas and the temperature of flue gas, the dilution air of denitrating system has also increased plant consumption in addition.
Summary of the invention
Technical matters to be solved by this invention, is just to provide a kind of denitrating system to coal-fired unit coal consumption impact assessment method.
Solve the problems of the technologies described above, the technical solution used in the present invention is:
Denitrating system, to a coal-fired unit coal consumption impact assessment method, is characterized in that comprising the following steps:
S1, measure the flue gas flow (Q2) of denitrating system import cross section (1) flue gas flow (Q1) and denitrating system outlet (2);
S2, measurement cross section (1) flue-gas temperature (t1), the flue-gas temperature (t2) of cross section (2), environment temperature (t
a);
The power consumption W of S3, measurement dilution air
xs;
S4, utilize the measurement result of step S1 to calculate system air leakage amount Δ Q (Δ Q=Q2-Q1);
S5, utilize the flue-gas temperature of the measurement of step S2 to calculate the flue gas enthalpy (H1) in cross section (1) and the flue gas enthalpy (H2) of cross section (2), calculate Δ H (Δ H=H2-H1); And air enthalpy H
a;
S6, utilize the result of step S1-step S5 measurements and calculations to show that denitrating system causes that to original therrmodynamic system input energy the numerical value of variation is: Q1 * Δ H+ Δ Q * (H2-H
a)+W
xs; Again this numerical value unit is brought in traditional computing formula after reunification, show that denitrating system affects numerical value to coal-fired unit coal consumption.
Effective effect: denitrating system of the present invention is to coal-fired unit coal consumption impact assessment method, simple, provide coal-fired unit net coal consumption rate more accurately to calculate, denitrating system is installed in coal-burning power plant's large area, the present invention has made up Traditional calculating methods does not have to consider the deficiency of newly-increased denitration environmental protection equipment on the impact of units consumption, also can reduce equipment in the course of receiving owing to calculating the not rigorous disagreement bringing.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is for adopting coal-burning power plant's air and gas system schematic diagram.
Embodiment
Coal-fired unit schematic diagram referring to Fig. 1 with denitrating system, denitrating system of the present invention, to coal-fired unit coal consumption impact assessment embodiment of the method, comprises the following steps:
S1, measure the flue gas flow (Q2) of denitrating system import cross section (1) flue gas flow (Q1) and denitrating system outlet (2);
S2, measurement cross section (1) flue-gas temperature (t1), the flue-gas temperature (t2) of cross section (2), environment temperature (t
a);
The power consumption W of S3, measurement dilution air
xs;
S4, utilize the measurement result of step S1 to calculate system air leakage amount Δ Q (Δ Q=Q2-Q1);
S5, utilize the flue-gas temperature of the measurement of step S2 to calculate the flue gas enthalpy (H1) in cross section (1) and the flue gas enthalpy (H2) of cross section (2), calculate Δ H (Δ H=H2-H1); And air enthalpy H
a; (computing method belong to existing method, are generally to confirm by looking into picture)
S6, utilize the result of step S1-step S5 measurements and calculations to show that denitrating system causes that to original therrmodynamic system input energy the numerical value of variation is: Q1 * Δ H+ Δ Q * (H2-H
a)+W
xs; Again this numerical value unit is brought in traditional computing formula after reunification, show that denitrating system affects numerical value to coal-fired unit coal consumption.
Claims (1)
1. denitrating system, to a coal-fired unit coal consumption impact assessment method, is characterized in that comprising the following steps:
S1, measure the flue gas flow (Q2) of denitrating system import cross section (1) flue gas flow (Q1) and denitrating system outlet (2);
S2, measurement cross section (1) flue-gas temperature (t1), the flue-gas temperature (t2) of cross section (2), environment temperature (t
a);
The power consumption W of S3, measurement dilution air
xs;
S4, utilize the measurement result of step S1 to calculate system air leakage amount Δ Q (Δ Q=Q2-Q1);
S5, utilize the flue-gas temperature of the measurement of step S2 to calculate the flue gas enthalpy (H1) in cross section (1) and the flue gas enthalpy (H2) of cross section (2), calculate Δ H (Δ H=H2-H1); And air enthalpy H
a;
S6, utilize the result of step S1-step S5 measurements and calculations to show that denitrating system causes that to original therrmodynamic system input energy the numerical value of variation is: Q1 * Δ H+ Δ Q * (H2-H
a)+W
xs; Again this numerical value unit is brought in traditional computing formula after reunification, show that denitrating system affects numerical value to coal-fired unit coal consumption.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410193291.0A CN104021273A (en) | 2014-05-08 | 2014-05-08 | Method for evaluating influences of denitration system on coal consumption of coal-fired unit |
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|---|---|---|---|
| CN201410193291.0A CN104021273A (en) | 2014-05-08 | 2014-05-08 | Method for evaluating influences of denitration system on coal consumption of coal-fired unit |
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| CN104021273A true CN104021273A (en) | 2014-09-03 |
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| CN201410193291.0A Pending CN104021273A (en) | 2014-05-08 | 2014-05-08 | Method for evaluating influences of denitration system on coal consumption of coal-fired unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108573102A (en) * | 2018-04-12 | 2018-09-25 | 国网天津市电力公司电力科学研究院 | A kind of SCR denitration device air leak rate of air curtain computational methods |
| CN109655489A (en) * | 2019-01-23 | 2019-04-19 | 国电科学技术研究院有限公司 | A kind of metering method and device of coal unit standard coal consumption |
| CN113972565A (en) * | 2021-10-29 | 2022-01-25 | 广东电网有限责任公司 | Dampproofing condensation system of preventing of prefabricated cabin transformer substation |
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| EP1481719A2 (en) * | 2003-05-28 | 2004-12-01 | Hitachi, Ltd. | Engine exhaust gas treatment system and exhaust gas treatment process |
| CN103390211A (en) * | 2013-06-24 | 2013-11-13 | 浙江大学 | Thermal generator set overall process energy management and cost analysis system |
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2014
- 2014-05-08 CN CN201410193291.0A patent/CN104021273A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1481719A2 (en) * | 2003-05-28 | 2004-12-01 | Hitachi, Ltd. | Engine exhaust gas treatment system and exhaust gas treatment process |
| CN103390211A (en) * | 2013-06-24 | 2013-11-13 | 浙江大学 | Thermal generator set overall process energy management and cost analysis system |
Non-Patent Citations (1)
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|---|
| 左松伟: "大型火电机组SCR脱硝系统能耗特性研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅰ辑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108573102A (en) * | 2018-04-12 | 2018-09-25 | 国网天津市电力公司电力科学研究院 | A kind of SCR denitration device air leak rate of air curtain computational methods |
| CN109655489A (en) * | 2019-01-23 | 2019-04-19 | 国电科学技术研究院有限公司 | A kind of metering method and device of coal unit standard coal consumption |
| CN109655489B (en) * | 2019-01-23 | 2021-08-13 | 国电科学技术研究院有限公司 | Method and device for metering standard coal consumption of coal-fired unit |
| CN113972565A (en) * | 2021-10-29 | 2022-01-25 | 广东电网有限责任公司 | Dampproofing condensation system of preventing of prefabricated cabin transformer substation |
| CN113972565B (en) * | 2021-10-29 | 2024-04-02 | 广东电网有限责任公司 | Dampproofing condensation system of preventing of prefabricated cabin transformer substation |
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Application publication date: 20140903 |