Extraction condensing heating system additionally provided with steam ejector and adjusting method of system

Abstract

The invention discloses an extraction condensing heating system additionally provided with a steam ejector and an adjusting method of the system. The system comprises a boiler, an extraction condensing type turbine unit, the steam ejector, a steam cooler, a temperature and pressure reducing device, a throttle orifice plate and a control valve. Two inlets of the steam ejector are connected with a turbine main steam pipeline and a medium pressure cylinder steam exhaust pipeline correspondingly, an outlet is connected with the steam cooler, a water inlet pipe and a water outlet pipe of the steamcooler are connected with a boiler water supply pipeline, the boiler water supply pipeline is provided with the throttle orifice plate, a steam outlet pipeline of the steam cooler is connected with the temperature and pressure reducing device, and the temperature and pressure reducing device is further connected with a high pressure cylinder steam exhaust pipe. Compared with the prior art, the unit emergency heating ability is improved on the premise of not affecting unit safety, it is ensured that a power plant can also meet heating requirements when some units break down and stop, meanwhile,the irreversible loss of the emergency heating process is effectively reduced compared with traditional emergency heating measures, and unit heating and energy saving effects are better.

Description

technical field [0001] The invention relates to a condensing heat supply system with additional steam injectors and an adjustment method thereof, belonging to the technical field of thermoelectricity. Background technique [0002] With the rapid development of the local economy, the heat demand of some industrial parks has grown rapidly. The construction of small boilers or small thermal power plants will face problems such as low efficiency and poor environmental protection; the construction of large heat and power cogeneration units will face problems such as excessive investment. The heating transformation of the extraction condensing steam turbine unit in a large power plant near the industrial park can not only make full use of the environmental protection equipment of the large unit to reduce environmental pollution, but also improve the energy utilization efficiency of the steam turbine unit, so it can achieve better comprehensive benefits. This has become an effecti...

AI Technical Summary

Problems solved by technology

At present, the emergency heating measures often adopted are to extract part of the main steam to directly supply heat through the temperature and pressure reducer, and this measure will inevitably cause a large irreversible loss of energy utilization, so it is necessary to improve the conventional emergency heating measures

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