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Steam jet vacuum system with energy conservation evaluation device and operation method of steam jet vacuum system

A vacuum system and evaluation device technology, which is applied in the direction of pump devices, steam/steam condensers, lighting and heating equipment, etc., can solve the problems of easy cavitation of vacuum pumps, reduced vacuum degree of condensers, and reduced power generation efficiency of units. Achieve optimal resource allocation, low overall energy consumption, and low renovation costs

Active Publication Date: 2016-10-12
CHINA DATANG CORP SCI & TECH RES INST CO LTD EAST CHINA BRANCH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the vacuum system of the thermal power plant condenser is generally composed of a water ring vacuum pump. During summer operation, the vacuum pump is prone to cavitation due to the increase in temperature, resulting in a decrease in the efficiency of the vacuum pump, and a decrease in the vacuum degree of the condenser, which in turn reduces the power generation efficiency of the unit.

Method used

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  • Steam jet vacuum system with energy conservation evaluation device and operation method of steam jet vacuum system
  • Steam jet vacuum system with energy conservation evaluation device and operation method of steam jet vacuum system
  • Steam jet vacuum system with energy conservation evaluation device and operation method of steam jet vacuum system

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Embodiment 1

[0044] A steam ejection vacuum system with an energy-saving evaluation device, including a high back pressure condenser 11, a low back pressure condenser 12, a steam ejector, a drain box 4 and a vacuum pump, the vacuum pump is connected with the high back pressure condenser 11 and the low back pressure condenser 11 The vacuum pipeline connection of the back pressure condenser 12 is characterized in that: there are two steam injectors, respectively the first steam injector 31 and the second steam injector 32, the injection fluid inlet of the first steam injector 31 and the The vacuum line of the high back pressure condenser 11 is connected, the injection fluid inlet of the second steam ejector 32 is connected with the vacuum line of the low back pressure condenser 12, the first steam ejector 31 and the second steam ejector 32 The working fluid inlets are all connected to the auxiliary steam main pipe 5, and the mixed fluid outlets of the first steam injector 31 and the second st...

Embodiment 2

[0049] A method for operating a steam ejection vacuum system with an energy-saving evaluation device, characterized in that the steps are as follows:

[0050] Step 1. Three vacuum pumps are started at the same time to quickly establish the vacuum of the condenser and make the vacuum of the condenser reach the predetermined value;

[0051] Step 2: Turn off the first vacuum pump 21 and the second vacuum pump 22 through the DCS control terminal 9, and simultaneously switch the first steam ejector 31 and the second steam ejector 32 into operation, and calculate the steam equivalent power P consumed by the system 1 ,

[0052] P 1 = D z q ( h 1 - h 2 ) ...

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Abstract

The invention discloses a steam jet vacuum system with an energy conservation evaluation device and an operation method of the steam jet vacuum system. The vacuum system comprises a high-backpressure condenser, a low-backpressure condenser, steam ejectors, a drainage tank and a vacuum pump, and further comprises the energy conservation evaluation device. The energy conservation evaluation device comprises a DCS control terminal, temperature sensors, pressure sensors and flow meters. Compared with the prior art, the steam jet vacuum system and the operation method have the following beneficial effects that operation of data and control over all parts are achieved through the DCS control terminal, the optimal resource allocation has been achieved, and the comprehensive energy consumption is kept being the lowest; by means of the scheme, the enterprise transformation cost is low, and the energy conservation effect achieved through the steam jet vacuum system under different loads of a unit can be monitored; online switching of two types of vacuum systems can be conducted according to the energy conservation effect; and the scheme is easy to operate, operators do not need to be specially trained, and the steam jet vacuum system and the operation method can be easily operated.

Description

technical field [0001] The invention relates to the technical field of energy saving of a condenser vacuum system in a power plant, in particular to a steam ejection vacuum system with an energy saving evaluation device and an operating method thereof. Background technique [0002] In view of the energy crisis emerging in the world today, energy saving and consumption reduction are becoming increasingly urgent. As a large coal-fired thermal power plant, the task of energy-saving transformation is particularly critical. At present, the vacuum system of the thermal power plant condenser is generally composed of a water ring vacuum pump. During summer operation, the vacuum pump is prone to cavitation due to the increase in temperature, resulting in a decrease in the efficiency of the vacuum pump, and a decrease in the vacuum degree of the condenser, which in turn reduces the power generation efficiency of the unit. [0003] In order to save energy and improve efficiency, and d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F28B9/10F04B37/14F04B41/06
CPCF04B37/14F04B41/06F28B9/10
Inventor 吕松松阮圣奇胡中强陈裕吴仲任磊邵飞徐钟宇陈开峰
Owner CHINA DATANG CORP SCI & TECH RES INST CO LTD EAST CHINA BRANCH