Multistage heat supply back pressure type steam turbine, thermodynamic system and heat supply method of thermodynamic system

Abstract

The invention discloses a multistage heat supply back pressure type steam turbine, a thermodynamic system and a heat supply method of the thermodynamic system, and belongs to the field of combined heat and power generation equipment. The multistage heat supply back pressure type steam turbine comprises a back pressure type steam turbine body, a steam inlet end and a steam exhaust end, at least onesteam extraction adjusting device is arranged in a through flow between the steam inlet end and the steam exhaust end, heat supply steam extraction openings of all levels are formed between the steamextraction adjusting devices and the steam inlet end and between every two adjacent steam extraction adjusting devices correspondingly, and the steam exhaust end serves as the last-level heat supplysteam extraction opening; the steam flow and the pressure of the corresponding heat supply steam extraction opening are adjusted through each steam extraction adjusting device, so that multiple stagesof heat supply steam with different parameters are provided at the same time; the heat supply steam of each stage is extracted as required after expanding and acting in the back pressure type steam turbine so that more reasonable parameter matching can be realized, and energy gradient utilization is more sufficient; and after the multi-stage heat supply back pressure type steam turbine and a variable heat regenerative system matched with the multi-stage heat supply back pressure type steam turbine are adopted, the multi-stage heat supply back pressure type steam turbine can still continuouslyoperate when the last-stage heat supply load of the steam exhaust end is free of existence.

Description

technical field [0001] The invention belongs to the field of combined heat and power equipment, and specifically relates to a multi-stage heating backpressure steam turbine, a thermal system and a heating method thereof, which are suitable for comprehensive energy-saving projects of industrial heating and heating and heating in industrial parks, and are relatively A typical project is a project with high-parameter industrial heat load and heating heat load at the same time. One back pressure machine of this type can realize the operation of industrial heat load and heating heat load in the heating season; it only runs continuously with industrial heat load in the non-heating season, without traditional The problem that the back pressure machine needs to be stopped due to the inability to absorb the exhaust steam after the heat load of the exhaust end is cut off has expanded the application of the back pressure machine, greatly improved the utilization rate of the equipment and ...

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Problems solved by technology

[0011] Further, the heating extraction ports of all levels are set as industrial heating extraction ports, and the final heating extraction ports are set as heating heating extraction ports, which can solve the problem that the heating back pressure machine cannot operate in non-heating seasons, and also It can be temporarily used as a heating back pressure machine when industrial heat users have no load demand, avoiding idle equipment, reducing project risks, and meeting the requirements of "energy production coupling integration and complementary utilization" proposed in the "13th Five-Year Plan for Energy Development"

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