1-General Standard Name
Centralized steam-water sampling & analysis device; complete power plant steam-water sampling rack system. Alternative names: Power station steam-water chemical monitoring device, high temperature & high pressure steam-water sampling system, thermal power plant online water quality sampling & monitoring assembly.
2-Overall Structure & Core Technical Features
1.Overall Structural Form
Adopts split modular structure, composed of two main units: high temperature & high pressure sampling rack and low temperature & low pressure instrument panel. The whole frame and pipeline adopt stainless steel layout, factory pre-assembled as a complete set with modular installation. On-site construction only needs to connect process sampling ports, cooling water source, power supply and signal lines, no scattered parts assembly required. Suitable for standardized machine room layout of power stations.
2. Core Components & Functions
1：High temperature & high pressure sampling pipeline assembly Collect high-temperature and high-pressure steam & water samples from boilers, steam turbines, deaerators, high/low pressure heaters and other thermal equipment.
2：High pressure globe valve & needle valve group Realize on/off of each sample water circuit, maintenance isolation and manual throttling regulation.
3：Double-coil cooler Rapidly reduce temperature of high-temperature samples down to the allowable measuring range of instruments.
4：High pressure filter Block impurities and rust in steam & water, protect rear instruments and precision pipelines from blockage.
5：Pressure reducing & stabilizing valve group Gradually reduce medium pressure and stabilize working pressure to ensure stable flow rate.
6：Constant flow flowmeter Accurately control sample water flow of each circuit to keep stable measuring conditions for online instruments.
7：Online analytical instruments Conductivity, pH, dissolved oxygen, sodium, silica, hydrazine and other water quality monitoring instruments for real-time data collection.
8：Manual sampling interface Reserve laboratory manual sampling points for manual comparison and calibration.
9：Electrical wiring & cabinet assembly Centralized wiring, terminal arrangement, instrument power supply and remote signal transmission interface.
3.Working Principle
High-temperature & high-pressure steam, boiler water, feed water and condensate water are led out from each thermal equipment. Samples firstly enter the high temperature & high pressure sampling rack for cut-off, pressure reduction, two-stage cooling and filtration pretreatment; then sent to the low temperature & low pressure instrument panel for pressure stabilization and flow distribution. One path goes to online analytical instruments for real-time continuous steam-water quality monitoring; another path is reserved for manual laboratory sampling. The whole system operates fully closed with constant temperature, constant pressure and constant flow, to monitor steam-water indexes in real time and prevent boiler scaling, pipeline corrosion and turbine salt deposition.
3-Application in Russian Petrochemical & Energy Industry
1.Thermal power plants & cogeneration stations (core application) All grades of coal-fired & gas-fired power units, regional thermal power plants and urban heating cogeneration projects in Russia are standard-equipped with SJZ series steam-water sampling devices, as essential core equipment for steam-water chemical supervision. One set is mandatory for each generating unit, with huge demand for stock renovation.
2.Petrochemical & natural gas plants Self-owned power stations of refineries, LNG plant thermal systems and gas-fired power plants are supporting steam-water sampling monitoring to ensure safe operation of self-owned generating units.
3.Coal chemical & fertilizer chemical enterprises Used in self-owned boilers and thermal systems of ammonia synthesis, methanol and coking plants for online monitoring of boiler steam-water quality, avoiding corrosion and shutdown risks.
4.Nuclear power & solar thermal power stations Steam-water monitoring of nuclear power plant secondary loop and sampling supervision of solar thermal power systems; requiring high equipment reliability and long-term dependence on such complete sets.
