High pressure steam depressurization, cooling and noise reduction system

Abstract

The invention discloses a high pressure steam depressurization, cooling and noise reduction system. The high pressure steam depressurization, cooling and noise reduction system comprises a boiler island that outputs the high pressure steam, the boiler island is connected to the inlet end of a high pressure steam depressurization valve through a high pressure steam main, and the outlet end of the high pressure steam depressurization valve is connected with a low pressure steam pipe through a noise reduction plate; and a pressure controller for controlling the steam pressure of the low pressuresteam pipe is further arranged on the low pressure steam pipe, the low pressure steam pipe is connected with a steam turbine unit, the noise reduction plate is a circular plate, a through hole capableof allowing the steam to circulate is formed in the center of the noise reduction plate, eight counter bores are evenly formed in the end, close to the low pressure steam pipe, of the noise reductionplate, the eight counter bores are distributed by surrounding the through hole, and a nozzle is welded to each counter bore and arranged in the steam flow direction. The high pressure steam depressurization, cooling and noise reduction system reduces the workload of pipeline cutting and reduces the workload of pipeline cleaning, and can realize high pressure steam depressurization, cooling and noise reduction without destroying the original steam pipe arrangement.

Description

Technical field: [0001] The invention relates to the field of polyester production, in particular to a system for reducing pressure, temperature and noise of high-pressure steam. Background technique: [0002] The steam generated in the production process of purified terephthalic acid (PTA) is used by users of the heating medium of the system, and the excess steam is sent to the steam turbine unit to recover energy for power generation. The normal working temperature of the steam turbine unit is about 145°C. In the parking state, because the preheating boiler cannot produce steam, it is necessary to depressurize the high-pressure steam to generate low-pressure steam for other heating fluids or steam turbines in the device to warm up and start. The temperature of the high-pressure steam is about 305°C. After decompression The steam temperature is about 185°C, which is far higher than the working temperature of the unit. If the temperature is too high, it will affect the long-...

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Problems solved by technology

If a new steam desuperheater is added for decompression and cooling, it is necessary to gas-cut, turn-hole welding or grinder cutting on the original steam pipeline. Welding slag and powder particles are likely to fall into the pipeline and pollute the steam pipeline, so as to reduce the pollution of the pipeline and clean up. It is quite difficult; at the same time, it is affected by the installation space and layout of the low-pressure steam pipe network on site

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