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Device and method for increasing boiler feedwater temperature

A boiler water supply and water supply system technology, applied in steam engine installations, feed water heaters, preheating, etc., can solve problems such as high cost and long downtime, achieve light unit load, save construction costs, and increase heat recovery and steam extraction Effect

Pending Publication Date: 2016-12-14
上海量朝能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are unfavorable factors such as long downtime and high cost required for technical transformation

Method used

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  • Device and method for increasing boiler feedwater temperature
  • Device and method for increasing boiler feedwater temperature
  • Device and method for increasing boiler feedwater temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Such as figure 1 As shown, the device for increasing boiler feed water temperature in this embodiment includes a steam pipeline 1, a newly added final stage high-pressure heater 2, a back pressure turbine generator 3 and a back pressure steam turbine extraction control valve 4. The steam output port of the steam pipeline 1 is connected to the inlet of the high-pressure cylinder 5 of the back-pressure turbine generator 3, and the steam extraction regulating valve 4 of the back-pressure steam turbine is arranged between the newly added final stage high-pressure heater 2 and the high-pressure cylinder 5 On the pipeline; the high-pressure cylinder 5 is provided with a high-pressure steam extraction port 7 and a steam exhaust port 8, and the extraction steam source of the high-pressure steam extraction port 7 on the back-pressure turbo-generator 3 is heated by adding a final high-pressure The device 2 continues to heat the feed water of the high-pressure heater 6 of the ori...

Embodiment 2

[0097] Such as figure 2 As shown, the device for increasing boiler feed water temperature in this embodiment includes a steam pipeline 1, a newly added final stage high-pressure heater 2, a back pressure turbine generator 3 and a back pressure steam turbine extraction control valve 4. The steam output port of the steam pipeline 1 is connected to the inlet of the high-pressure cylinder 5 of the back-pressure turbine generator 3, and the steam extraction regulating valve 4 of the back-pressure steam turbine is arranged between the newly added final stage high-pressure heater 2 and the high-pressure cylinder 5 On the pipeline; the high-pressure cylinder 5 is provided with a high-pressure cylinder exhaust port 9 and a steam extraction port 10, and the steam source of the high-pressure cylinder exhaust port 9 of the back pressure type turbogenerator 3 is used to pass through the new final stage The high-pressure heater 2 continues to heat the feedwater of the high-pressure heater ...

Embodiment 3

[0102] Such as image 3 As shown, the device for increasing boiler feed water temperature in this embodiment includes a steam pipeline 1, a newly added final stage high-pressure heater 2, a back pressure turbine generator 3 and a back pressure steam turbine extraction control valve 4. The steam output port of the steam pipeline 1 is connected to the inlet of the high-pressure cylinder 5 of the back-pressure turbine generator 3, and the steam extraction regulating valve 4 of the back-pressure steam turbine is arranged between the newly added final stage high-pressure heater 2 and the high-pressure cylinder 5 On the pipeline; the high-pressure cylinder 5 is provided with a high-pressure steam extraction port 7 and a steam exhaust port 8, and the extraction steam source of the high-pressure steam extraction port 7 on the back-pressure turbo-generator 3 is heated by adding a final high-pressure The device 2 continues to heat the feed water of the high-pressure heater 6 of the orig...

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Abstract

The invention discloses a device for increasing the boiler feedwater temperature. The device comprises a steam pipeline, a newly added final-stage high-pressure heater, a back pressure type steam turbine generator and a back pressure type steam turbine extraction control valve, wherein steam of the steam pipeline is from a boiler, and the steam flows through a high-pressure cylinder of the back pressure type steam turbine generator, the back pressure type steam turbine extraction control valve and the newly added final-stage high-pressure heater in sequence. The steam which enters the newly added final-stage high-pressure heater is cooled to be hydrophobic, then flows automatically step by step through a high-pressure heater of an original feedwater system and enters a deaerator at last; the other part of the steam continues to do work at the last stages of the back pressure type steam turbine generator, a part of the steam can be extracted from a plurality of subsequent stages so as to be supplied to other users, and the final exhaust steam can also be used for other applications.

Description

technical field [0001] The invention belongs to the field of power plants, and in particular relates to a device and method for increasing boiler feed water temperature. Background technique [0002] Under various load conditions, the boiler feed water temperature of the turbogenerator unit changes with the load fluctuation of the unit. The essence is that when the unit load fluctuates, the steam extraction parameters of the final high-pressure heater change, resulting in a change in the final feed water temperature. . Steam turbine extraction generally adopts non-adjustable steam extraction, and its final parameters depend on the load of the unit and the physical position of the steam extraction port, and the physical position of the steam extraction port cannot be displaced once the unit is put into operation. Therefore, when the unit load When it drops, the extraction pressure of the original final stage will definitely drop, and the feed water temperature will drop acco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22D1/32F01K11/02
CPCF01K11/02F22D1/325
Inventor 蒋成富
Owner 上海量朝能源科技有限公司
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