Description

Level measurement of dichlorobenzene and sodium sulphide tank

Requisitos para el punto de medición

  • Remote converter up to 100 m / 328 ft
  • Purging system for antenna cleaning

Description

Pressure measurement of dichlorobenzene tank

Requisitos para el punto de medición

  • Monitoring of interisation pressure

Description

Level measurement of tank with polar solvent

Requisitos para el punto de medición

  • Approvals: ATEX, cQPSus, IECEx, INMETRO, NEPSI
  • Ceramic process seal system for demanding process conditions

Description

Pressure measurement in the polymerisation reactor

Requisitos para el punto de medición

  • Process control

Description

Flow measurement of evaporator

Requisitos para el punto de medición

  • Integrated P+T measurement: output of gross/net heat
  • Optional integrated reduction of nominal size for a large measurement span

Description

Evaporator head pressure measurement

Requisitos para el punto de medición

  • Control of evaporation temperature

Description

Level measurement in evaporator

Requisitos para el punto de medición

  • Control of sump extraction

Description

Differential pressure measurement of heat transfer fluid at evaporator

Requisitos para el punto de medición

  • Monitoring of heat exchanger

Description

Level measurement of process tank with PPS/NaCl suspension

Requisitos para el punto de medición

  • Extensive choice of probes for all applications
  • Optional: extended temperature and pressure conditions

Description

Level measurement of PPS powder storage tank

Requisitos para el punto de medición

  • 80 GHz for demanding applications with powders in very dusty atmospheres
  • Empty tank spectrum function eliminates false reflections

Description

Integrated control valve with flow, pressure and temperature measurement of water

Requisitos para el punto de medición

  • Local measurement and control of flow
  • High control quality

Overview

Polyphenylene sulphide production in plastics & polymers production

Advanced Instrumentation for Continuous Flow and Pressure Measuremnts in PPS Production

Polyphenylene sulphide (PPS) is a high-temperature resistant, especially robust thermoplastic high performance plastic for highly durable moulded parts, for example in the electronics and vehicle sector, for pump bodies or medical equipment. During the industrial manufacturing process, PPS is polymerised in the reactor by the reaction of dichlorobenzene with sodium sulphide in a polar solvent under increased temperature and pressure conditions. The result is a suspension that contains PPS and sodium chloride. The sodium chloride has yet to be removed to create PPS resin that is free from chlorine and sodium. To this end, the suspension is concentrated in an evaporation process during which the sodium chloride is removed in repeated filtering and wash processes. The PPS end product is then pulverised and packed for further processing.

KROHNE has a wide product range of level, flow, (differential) pressure and density measuring equipment for plastic and polymer products, which can be perfectly tailored to the respective technical tasks. These include, for example, our radar level meters for continuous, precise and non-contact level measurement in storage and process tanks, even with poorly reflective media. Appropriately equipped vortex flowmeters from our range allow not only simultaneous temperature and pressure measurement, but also output of the p- and T-compensated mass flow. And KROHNE's innovative electronic differential pressure transmitters for obtaining fast, undistorted measuring data are a practical alternative to diaphragm seal installations with long capillary tubes. The main advantage of an eDP system is the fact that it can be easily and efficiently connected to the tank: smaller process connections without capillaries are possible between the top and bottom gauge connections, which saves money and installation time.

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