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Heat supply system of high-back-pressure double-rotor electric heating unit

A heating system, high back pressure technology, applied in heating systems, hot water central heating systems, household heating, etc., can solve problems such as energy waste

Pending Publication Date: 2017-09-26
DATANG DONGBEI ELECTRIC POWER TESTING & RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Turbine exhaust steam loss is waste heat emission for thermal power plants, but for low-grade building heating, it constitutes a huge waste of energy

Method used

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  • Heat supply system of high-back-pressure double-rotor electric heating unit
  • Heat supply system of high-back-pressure double-rotor electric heating unit

Examples

Experimental program
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Effect test

Embodiment 2

[0029] In the heating system of the high back pressure dual-rotor electric heating unit in this embodiment, on the basis of Embodiment 1, the low-pressure cylinder rotor of the steam turbine unit includes a pure condensing rotor used during non-heating period and a high back pressure rotor used during heating period , among them, the number of stages of the pure condensing rotor is 2×6, the number of stages of the high back pressure rotor is 2×4, the whole forging has no center hole, and the high back pressure rotor has two impellers less than the pure condensing rotor; the pure condensing rotor and the high The half-couplings at both ends of the back pressure rotor are centered and the accuracy of the bolt holes of the two half-couplings is consistent.

[0030] Furthermore, the replacement structure of the pure condensate rotor and the high back pressure rotor: hydraulic expansion coupling bolts are used, and the positioning and boring accuracy of the coupling pin holes are gu...

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Abstract

The invention relates to a heat supply system of a high-back-pressure double-rotor electric heating unit. In the heating period in winter, a turbine unit operates at a high back pressure, a condenser is used as a basic heating network heater of the heat supply system, latent heat of vaporization of exhaust steam of a low-pressure cylinder of the unit heats heating network circulating water once, and the temperature of a heating network circulating water outlet of an outlet of the condenser reaches the difference between a saturated steam temperature corresponding to the exhaust steam pressure of the low-pressure cylinder under the working condition and the terminal temperature difference of the condenser; a turbine unit heating network heater is used as a peak load heater to conduct secondary heating on the heating network circulating water existing after dead steam conducts primary heating, and the temperature of the heating network circulating water is raised to a heat supply temperature value designed by the heat supply system.

Description

technical field [0001] The invention relates to a heating system of a high back pressure double-rotor electric heating unit. Background technique [0002] my country is currently one of the largest greenhouse gas emitters in the world, and "energy saving and emission reduction" is an important core of my country's social and economic development during the "Twelfth Five-Year Plan" period. Improving energy utilization and strengthening waste heat recovery are fundamental measures to save energy, reduce carbon emissions, and protect the environment. The cold end loss of a thermal power plant is the largest loss in the thermal system of a power plant. Taking a power plant as an example, under the rated heating conditions in winter, the exhaust steam loss of the steam turbine can account for more than 39% of the total calorific value of the fuel. Turbine exhaust steam loss is waste heat emission for thermal power plants, but it constitutes a huge energy waste for low-grade bui...

Claims

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Application Information

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IPC IPC(8): F24D3/10F01K17/02
CPCF01K17/02F24D3/10Y02E20/14
Inventor 王凤良杨丹
Owner DATANG DONGBEI ELECTRIC POWER TESTING & RES INST
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