An improved primary heating station system and its working method

Abstract

The invention discloses an improved heating first station system and its working method. At present, there is no improved heating first station with a reasonable structural design, which can effectively increase the output of small steam turbines, reduce the drain temperature of the heating network and increase the water supply temperature. system. The system of the present invention includes a steam turbine, a heat network heater, a small steam turbine condenser, a heat network drain pump, a heat network drain main pipe, a heat network return water main pipe, and a heat network water supply main pipe; The steam inlet of the network heater is connected with the steam inlet of the condenser of the small steam turbine, the drain outlet of the heat network heater is connected with the inlet of the heat network drain pump, the outlet of the heat network drain pump is connected with the inlet of the heat network drain main pipe valve, The outlet of the main drain pipe valve of the heat network is connected to the main drain pipe of the heat network, and the drain outlet of the condenser of the small steam turbine is connected near the inlet of the drain pump of the heat network. The invention has high energy utilization efficiency and good economic benefits, and can be well applied to the reconstruction and expansion of the first heat supply station using small steam turbines.

Description

technical field [0001] The invention relates to an improved heating first station system, which is a system capable of effectively increasing the output of a small steam turbine, and belongs to the technical field of cogeneration of heat and power. Background technique [0002] The new condensing and pumping retrofit technology is different from the traditional steam extraction and heating technology. By installing a cooling steam bypass, it can realize the safe operation of the low-pressure cylinder of the steam turbine at an extremely low flow rate (5t / h-10t / h). Compared with the traditional The advanced heating and extraction technology can provide more extraction steam, so the new condensing and extraction retrofit technology has been more and more widely used. Because of the large increase in heating and steam extraction, the heat load that can be provided by the first heating station also increases. In the case of no expansion of the primary pipe network, it is necessa...

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Problems solved by technology

[0005] The condensate polishing device is mainly used for condensate impurities, but the device requires the inlet water temperature to be below 50 to 60°C. If the temperature is too high, the filter element will be damaged and the service life of the equipment will be affected. The amount of condensed water is extremely low, and it is impossible to effectively cool the sent heat network drain (80-90°C), so it is very necessary to cool down the heat network drain after the steam turbine removes the low-pressure cylinder

[0006] At present, there is no improved heating first station system with reasonable structure design, easy to use, which can effectively increase the output of small steam turbines, reduce the drain temperature of the heating network and increase the temperature of water supply

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