System and method for cleaning rotor when steam turbine is started in ammonia synthesis production

Abstract

The invention discloses a system and a method for cleaning a rotor when a steam turbine is started in ammonia synthesis production. The system comprises a steam turbine, a steam pipe network for introducing medium-pressure steam into the steam turbine and is sequentially provided with a first steam gate valve, a second steam gate valve, a quick-closing valve and a regulating valve, wherein a bypass valve is connected in parallel between the steam inlet and the steam outlet of the first steam gate valve; a boiler water pipeline for distributing boiler water into the steam pipe network is connected between the second steam gate valve and the quick-closing valve, and a water distribution valve and a blind flange are sequentially arranged on the boiler water pipeline in the water flow direction; and a boiler water branch pipeline for sending part of boiler water of the blind flange into a flash evaporation tank for vapor-liquid separation is also arranged on the boiler water pipeline; anda vent pipe is also arranged on the steam pipe network, and a first warm pipe vent valve and a second warm pipe vent valve are arranged on the vent pipe. According to the system and the method, saturated wet steam is utilized for cleaning, so that the aim of cleaning scaling matters accumulated on rotor static and dynamic blades and nozzles can be realized under the condition that the unit is notstopped.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and relates to a method for cleaning chemical equipment with steam, in particular to a system for cleaning the rotor of a steam turbine during start-up of synthetic ammonia production with saturated wet steam. Background technique [0002] When the ammonia synthesis plant is in normal operation, due to the long operating period of the steam turbine, the quality of the medium and high pressure steam cannot be well guaranteed, which makes the rotor and its main flow channel more and more fouled, which leads to a significant increase in the pressure of the regulating stage of the steam turbine under the same load , the steam consumption increases accordingly, which eventually makes the working ability of the steam turbine drop significantly, and the economic effect seriously declines. Contents of the invention [0003] In order to solve the problems existing in the cleaning process of ...

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Problems solved by technology

[0003] In order to solve the problems existing in the cleaning process of the existing steam turbine, the present invention discloses a system and method for cleaning the rotor when the steam turbine is started in the production of synthetic ammonia. The saturated wet steam is used for cleaning, which can realize the cleaning of the rotor without shutting down the unit. The purpose of fouling accumulated on blades and nozzles

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