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Blowdown steam recovery system of multi-pressure boiler

A recovery system and steam technology, which is applied to steam boiler components, steam boilers, steam generation, etc., can solve the problems of low thermal efficiency of the system, insufficient heat recovery of high-pressure steam drum sewage, etc., and achieve sufficient heat recovery and cavitation Small, the effect of improving thermal efficiency

Pending Publication Date: 2020-12-25
MHPS DONGFANG BOILER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention mainly solves the technical defect in the prior art that the thermal efficiency of the system is low due to insufficient heat energy recovery of the high-pressure steam drum sewage, and provides a multi-functional system with relatively high thermal efficiency due to sufficient heat recovery of the high-pressure steam drum sewage. Boiler Blowdown Steam Recovery System

Method used

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  • Blowdown steam recovery system of multi-pressure boiler
  • Blowdown steam recovery system of multi-pressure boiler
  • Blowdown steam recovery system of multi-pressure boiler

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: as attached figure 2 As shown, the present invention includes a high-pressure steam drum 1, a medium-pressure steam drum 2, a low-pressure steam drum 3, a medium-pressure continuous row expansion vessel 4, a low-pressure continuous row expansion vessel 5, and a timing blowdown expansion vessel 6;

[0026] The blowdown outlet of the high-pressure steam drum 1 is connected to the medium-pressure continuous discharge expansion vessel 4 through the high-pressure continuous blowdown pipeline 7, and the high-pressure continuous blowdown pipeline 7 is provided with a high-pressure blowdown control valve 71;

[0027] The flash steam outlet on the medium-pressure continuous expansion vessel 4 is connected to the medium-pressure steam drum 2 through the connecting pipeline provided with the first check valve 12, and the waste water outlet of the medium-pressure continuous expansion vessel 4 is connected to the medium-pressure continuous expansion vessel 4 through th...

Embodiment 2

[0034] Embodiment 2: as attached image 3 As shown, the present invention includes a high-pressure steam drum 1, a medium-pressure steam drum 2, a low-pressure steam drum 3, a medium-pressure continuous row expansion vessel 4, a low-pressure continuous row expansion vessel 5, and a timing blowdown expansion vessel 6;

[0035] The blowdown outlet of the high-pressure steam drum 1 is connected to the medium-pressure continuous blowdown expansion vessel 4 through the high-pressure continuous blowdown pipeline 7, and the high-pressure continuous blowdown pipeline 7 is provided with a high-pressure blowdown control valve 71 and a high-pressure manual control valve 72, and a high-pressure manual control valve 72 It is located on the rear side of the high-pressure sewage control valve 71 according to the direction of the sewage;

[0036] The flash steam outlet of the medium-pressure continuous expansion vessel 4 is connected to the medium-pressure steam drum 2 through the connecting ...

Embodiment 3

[0044] Embodiment 3: as attached Figure 4 As shown, the present invention includes a high-pressure steam drum 1, a medium-pressure steam drum 2, a low-pressure steam drum 3, a medium-pressure continuous row expansion vessel 4, a low-pressure continuous row expansion vessel 5, and a timing blowdown expansion vessel 6;

[0045] The blowdown outlet of the high-pressure steam drum 1 is connected to the medium-pressure continuous discharge expansion vessel 4 through the high-pressure continuous blowdown pipeline 7, and the high-pressure continuous blowdown pipeline 7 is provided with a high-pressure blowdown control valve 71;

[0046] The flash steam outlet of the medium-pressure continuous expansion vessel 4 is connected to the medium-pressure steam drum 2 through the connecting pipeline provided with the first check valve 12, and the waste water outlet of the medium-pressure continuous expansion vessel 4 is connected through the first regulating valve 10. The connecting pipeline...

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Abstract

The invention relates to a blowdown steam recovery system of a multi-pressure boiler. The blowdown steam recovery system comprises a high-pressure steam pocket, a medium-pressure steam pocket, a low-pressure steam pocket, a medium-pressure continuous blowdown flash tank, a low-pressure continuous blowdown flash tank and a timing blowdown flash tank, wherein the high-pressure steam pocket is connected with the medium-pressure continuous blowdown flash tank through a high-pressure continuous blowdown pipeline; the medium-pressure continuous blowdown flash tank is connected with the low-pressurecontinuous blowdown flash tank through a first adjusting valve and connected with the medium-pressure steam pocket through a first check valve, and the medium-pressure steam pocket is connected with the low-pressure continuous blowdown flash tank through a medium-pressure continuous blowdown pipeline; and the low-pressure continuous blowdown flash tank is connected with the timing blowdown flash tank through a second adjusting valve and connected with the low-pressure steam pocket through a second check valve, and the low-pressure steam pocket is connected with the timing blowdown flash tank through a low-pressure continuous blowdown pipeline. By additionally arranging the medium-pressure continuous blowdown flash tank, step flash evaporation of blowdown water of the high-pressure steam pocket is achieved in the medium-pressure continuous blowdown flash tank and the low-pressure continuous blowdown flash tank, and the heat efficiency of recycling blowdown steam is greatly improved.

Description

technical field [0001] The invention relates to a waste heat boiler blowdown system, in particular to a multi-pressure boiler blowdown steam recovery system, which belongs to the technical field of power plant boiler equipment. Background technique [0002] With the increasing use of clean energy, the construction of natural gas combined cycle power plants will continue to grow. A development trend of the combined cycle is that the capacity is getting bigger and bigger. In order to improve the efficiency of the combined cycle, the supporting waste heat boiler usually adopts a multi-pressure system to maximize the use of the exhaust energy of the gas turbine. Since the blowdown rate of the boiler is generally fixed, the greater the evaporation of the boiler, the greater the blowdown, and the more energy lost in blowdown. Therefore, adding a blowdown steam recovery system to the blowdown system is a necessary measure to reduce energy waste and improve the thermal efficiency o...

Claims

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Application Information

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IPC IPC(8): F22B37/54F22B37/02
CPCF22B37/02F22B37/54F22B37/545
Inventor 季划李文杰刘彬武王利宏林正春邓倩刘慧张澈
Owner MHPS DONGFANG BOILER CO LTD