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In-place steam and water sampling device for power plant and sampling method

A kind of sampling device, technology of power plant

Pending Publication Date: 2018-08-31
HUANENG POWER INTERNATIONAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, the dissolved oxygen in the water sample reacts with the sampling pipeline and is consumed. The measured value of the dissolved oxygen meter cannot truly reflect the actual dissolved oxygen concentration in the soda water; iron and other substances in the water sample will be adsorbed and deposited in the sampling pipeline. The iron content of manual sampling analysis cannot truly reflect the actual iron content in soda water, and it will also affect the measurement of water sample pH, conductivity and other parameters

Method used

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  • In-place steam and water sampling device for power plant and sampling method

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Embodiment Construction

[0019] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0020] Such as figure 1 As shown, a kind of soda-water sampling device in a power plant of the present invention comprises a sampling pipeline 2 connected with a main soda-water pipeline or an original on-site soda sampling pipeline, a sampler 1 successively arranged on the sampling pipeline 2, an on-site sampling Valve 3, boiling cooler 4, tubular cooler 5, and pressure reducing valve 6; the sampling pipeline after the pressure reducing valve 6 is divided into two paths, one path of sampling pipeline is provided with a manual sampling valve 7 for manual sampling, and the other path of sampling An instrument sampling valve 8 and an instrument are arranged on the pipeline, and the pipeline behind the instrument is divided into two routes, one of which is connected to the boiling cooling water tank 11 through the first cooling water supply pipeline 10-1, and th...

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Abstract

The invention provides an in-place steam and water sampling device for a power plant and a sampling method. A sampler is added to a steam and water main pipeline or an original in-place steam and water sampling pipeline, a water sample flows out of the sampler and then is subjected to temperature reduction and pressure reduction in place by a fluidization cooler, a tubular cooler and a pressure reducing valve, and parameters such as temperature, pressure and the like of the water sample can meet requirements of chemical instrument measurement and manual sampling analysis; cooling water of thefluidization cooler and the tubular cooler carries away heat of the steam and water sample through boiling evaporation, air cooling and in other cooling ways, and supplementary water of the cooling water comes from the water sample, and additional supplementation of the cooling water is not needed; in-place steam and water sampling is realized under the condition of lack of cooling water in the place of a sampling point, influence of a sampling pipeline on steam and water quality is reduced to the greatest extent, and steam and water sampling representation is improved greatly.

Description

technical field [0001] The invention relates to the technical field of steam-water sampling and monitoring of thermal equipment in a power plant, in particular to an on-site sampling device and sampling method for steam-water in a power plant. Background technique [0002] Water samples such as main steam and feed water in power plants have the characteristics of high temperature and high pressure. After sampling, multi-stage cooling and temperature reduction and pressure reduction treatment are required. Since the steam-water sampling point is usually located at the top of the boiler, if the large-flow circulating cooling water is designed to lead to the top of the boiler to cool the steam-water samples, the investment and operation costs will be high. [0003] At present, power plants generally adopt the design scheme of centralized sampling and measurement of steam and water, so that laboratory personnel can concentrate on manual sampling and analysis, and online chemical...

Claims

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Application Information

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IPC IPC(8): G01N1/10
CPCG01N1/10
Inventor 曹杰玉刘玮李俊菀
Owner HUANENG POWER INTERNATIONAL
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