CN103574571A - Two-stage flash evaporator of waste heat power generation system of cement kiln - Google Patents
Two-stage flash evaporator of waste heat power generation system of cement kiln Download PDFInfo
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- CN103574571A CN103574571A CN201210273062.0A CN201210273062A CN103574571A CN 103574571 A CN103574571 A CN 103574571A CN 201210273062 A CN201210273062 A CN 201210273062A CN 103574571 A CN103574571 A CN 103574571A
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- flash evaporator
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- cement kiln
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention relates to a two-stage flash evaporator of a waste heat power generation system of a cement kiln The waste gas utilization efficiency of the cement kiln can be particularly improved during waste heat power generation by the aid of the two-stage flash evaporator. The two-stage flash evaporator is characterized in that two flash evaporators are serially connected with each other, a coal economizer is connected with a water inlet of the primary flash evaporator by a pipeline, a water outlet of the primary flash evaporator is connected with a water inlet of the secondary flash economizer, a water outlet of the secondary flash evaporator is connected to a boiler feed water pump, and a steam outlet of the primary flash evaporator and a steam outlet of the secondary flash evaporator are respectively communicated with a rear stage of a steam turbine to do work. The two-stage flash evaporator has the advantages that a system is simple and is low in cost, convenient to operate and adaptive to the characteristic of sharp fluctuation of waste gas parameters of the cement kiln, maximum generated power can be acquired from low-grade heat sources, the exhaust temperature of a boiler can be about 90 DEG C under the control, the heat utilization rate of low-temperature flue gas can be increased, and accordingly the purpose of utilizing energy to the greatest extent can be achieved.
Description
Technical field
The present invention relates to the double flash evaporation device in a kind of cement kiln waste-heat power generation system, especially a kind of double flash evaporation device that can improve waste gas utilization efficiency in cement kiln residual heat generating.
Background technology
As everyone knows, saving the energy is a set longtime policy of China, and wherein the utilization of waste heat is in the most positive and the effectively existing industry of means ， China many fields, and the utilization of waste heat in production process is all drawn attention.In cement industry transformation, a large amount of novel process equipment and production line have been dropped in recent years, supporting pure middle and low temperature cement afterheat generation system.In actual applications, due to technical process, the parameter major part of process waste flue gas is in fluctuation status.And fluctuating range often exceed the design of conventional afterheat generating system can self-regulation scope, make the afterheat generating system can not stable operation.Some fluctuating ranges are even greatly to making common afterheat generating system be forced to off-the-line and blowing out, and the economic benefit of waste heat recovery cannot guarantee.At present, although part of cement factory has introduced the afterheat generating system with flash vessel, had active adjustment ability, dissolved the instable impact of technique flue gas, but defect has been also obvious, because the many employings of this part of cement factory is single stage flash afterheat generating system, can not adapt to cement kiln flue gas fluctuation in a big way, can not guarantee that cogeneration can move reposefully, and, the hot water temperature who discharges from flash vessel delivery port is also very high, and thermal source could not access sufficient utilization.
Summary of the invention
In order to overcome the waste of thermal source, make the stable operation of afterheat generating system energy, the present invention has designed a kind of double flash evaporation device that improves waste gas utilization efficiency for cement afterheat generation industry, and this device can make full use of thermal source, and can regulate significantly flue gas fluctuation.
The technical solution adopted for the present invention to solve the technical problems is: two flash vessel cascade arrangements, one-level flash vessel water inlet is connected with economizer outlet conduit, steam (vapor) outlet passes into steam turbine rear class by pipeline and does work, one-level flash vessel delivery port is connected with two-stage flash device water inlet by pipeline, two-stage flash device steam (vapor) outlet passes into steam turbine rear class by pipeline and does work, and outlet conduit is connected with feed pump.
The present invention is applicable to vertical boiler and horizontal boiler, AQC stove drum is delivered to respectively on high temperature moisture three tunnels after economizer heating, in PH stove (SP stove) drum and one-level flash vessel, entering high-temperature water in one-level flash vessel produces saturated vapor under certain pressure by flash principle and sends into steam turbine rear class and play auxiliary acting effect, and the water outlet of one-level flash vessel is as the thermal source of two-stage flash device flash distillation saturated vapor, the saturated vapor that two-stage flash device flashes off is sent into the auxiliary acting of steam turbine rear class equally.
Owing to having introduced double flash evaporation system, by the low-grade low temperature heat energy of the unserviceable part of conventional power generation usage system, by flash system, flash off saturated vapor, enter multi-parameter steam turbine work done generating together with superheated steam, thereby increase cogeneration power.Adopt multiple electric 10% left and right of the general comparable routine techniques of technique.Owing to having increased double flash evaporation system, the fluctuation of cement kiln (especially kiln hood) exhaust gas parameters be can carry out to adapt in a big way by regulating system quantity of circulating water simultaneously, system reliability of operation and stability improved.
The invention has the beneficial effects as follows, double flash evaporation system not only has that system is simple, cost is low, the feature of the fluctuation of convenient operation, adaptation cement kiln waste gas parameter, more can make low-grade thermal source obtain generated output to greatest extent, boiler exhaust temperature can be controlled to 90 ℃ of left and right, the heat utilization efficiency that improves low-temperature flue gas, has so just realized the target that maximally utilises energy.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is with the cement afterheat generation process system of adjustable double flash evaporation device system (the horizontal PH boiler of kiln tail) schematic diagram.
Fig. 2 is with the cement afterheat generation process system of adjustable double flash evaporation device system (the vertical SP boiler of kiln tail) schematic diagram.
Wherein
The horizontal PH boiler 2 superheater 3 evaporimeter 4 drum 5 kiln hood AQC boilers of 1 kiln tail
6 economizer 7 evaporimeter 8 superheater 9 drum 10 NO.1 flash vessels
11 NO.2 flash vessel 12 boiler circulation pump 13 steam turbine 14 generators
The vertical SP boiler of 15 condenser 16 condensate pump 17 feed pump 18 kiln tail
The specific embodiment
In Fig. 1 and Fig. 2, double flash evaporation device of the present invention, by two flash vessel cascade arrangements, economizer 6 connects the water inlet of one-level flash vessel 10 by pipeline, the delivery port of one-level flash vessel 10 is connected with the water inlet of two-stage flash device 11, the delivery port of two-stage flash device 11 is connected to boiler feed pump 17, and the steam (vapor) outlet of one-level flash vessel 10 and two-stage flash device 11 leads to respectively steam turbine 13 rear class actings.
During work, AQC stove drum 5 is delivered to respectively, PH stove drum 4(or SP stove drum 18 in high temperature moisture three tunnels after economizer 6 heating) and one-level flash vessel interior 10.Entering high-temperature water in one-level flash vessel 10 produces saturated vapor under certain pressure by flash principle and sends into steam turbine 13 rear classes and play auxiliary acting effect, and the water outlet of one-level flash vessel 10 is as the thermal source of two-stage flash device 11 flash distillation saturated vapors, the saturated vapor that two-stage flash device 11 flashes off is sent into the auxiliary acting of steam turbine 13 rear classes equally.
Claims (1)
1. double flash evaporation device in a cement kiln waste-heat power generation system, it is characterized in that: described device has two flash vessels, two flash vessel tandems are connected, economizer connects the water inlet of one-level flash vessel by pipeline, the delivery port of one-level flash vessel is connected with the water inlet of two-stage flash device, the delivery port of two-stage flash device is connected to boiler feed pump, and the steam (vapor) outlet of one-level flash vessel and two-stage flash device leads to respectively the acting of steam turbine rear class.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210273062.0A CN103574571A (en) | 2012-08-02 | 2012-08-02 | Two-stage flash evaporator of waste heat power generation system of cement kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210273062.0A CN103574571A (en) | 2012-08-02 | 2012-08-02 | Two-stage flash evaporator of waste heat power generation system of cement kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103574571A true CN103574571A (en) | 2014-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210273062.0A Pending CN103574571A (en) | 2012-08-02 | 2012-08-02 | Two-stage flash evaporator of waste heat power generation system of cement kiln |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104406148A (en) * | 2014-11-26 | 2015-03-11 | 大连福佳·大化石油化工有限公司 | Power generation system capable of recovering waste heat of rectifying tower air cooler |
| CN109210522A (en) * | 2018-10-04 | 2019-01-15 | 孙学贤 | Flash boiler and its operation logic |
| CN112985083A (en) * | 2021-02-06 | 2021-06-18 | 四川省金路树脂有限公司 | Device and method for synthesizing hydrogen chloride and coproducing medium-low pressure steam in three-stage manner |
-
2012
- 2012-08-02 CN CN201210273062.0A patent/CN103574571A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104406148A (en) * | 2014-11-26 | 2015-03-11 | 大连福佳·大化石油化工有限公司 | Power generation system capable of recovering waste heat of rectifying tower air cooler |
| CN109210522A (en) * | 2018-10-04 | 2019-01-15 | 孙学贤 | Flash boiler and its operation logic |
| CN112985083A (en) * | 2021-02-06 | 2021-06-18 | 四川省金路树脂有限公司 | Device and method for synthesizing hydrogen chloride and coproducing medium-low pressure steam in three-stage manner |
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Application publication date: 20140212 |