Combined heat and power generation full-condensation afterheat recovery technology

A waste heat recovery and cogeneration technology, applied in heating methods, preheating, heating fuels, etc., can solve the problems of energy waste, low-grade cooling water waste heat that cannot be used and consumed, and achieve the effect of recycling waste heat

Inactive Publication Date: 2018-07-24
DALIAN BAOGUANG ENERGY SAVING AIR CONDITIONING EQUIP
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Problems solved by technology

[0005] Aiming at the low grade of waste heat in the cooling water of the thermal power plant condenser in winter, which cannot be utilized, and the thermal power plant needs to consume energy to condense the exhaust steam after the steam turbine works, resulting in huge waste of energy, the invention provides a method to use the return water from the primary grid as condensed water to directly enter the condensing water. The method of reducing the temperature of the condensed water outlet of the condenser step by step, and at the same time increasing the water supply temperature of the primary network step by step, so as to improve the power generation efficiency and heating effect

Method used

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  • Combined heat and power generation full-condensation afterheat recovery technology

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specific Embodiment approach

[0026] The return water from the primary network of the heating station 1 is transported back to the thermal power plant. After the return water enters the absorption heat pump 2 for adjusting the temperature of the meeting water, it is used as a low-temperature heat source. After being absorbed, the temperature is further reduced and adjusted to the temperature suitable for the cooling water of the condenser 3.

[0027] The cooling water after work in the condenser 3 is discharged from the outlet of the condenser 3, and is divided into two parts at the same time, most of which are used as low-temperature heat sources for the first-stage absorption heat pump 5, the second-stage absorption heat pump 6, and the third-stage absorption heat pump 7 , a small part is used as the primary network water supply, through the first-stage absorption heat pump 5, the second-stage absorption heat pump 6, and the third-stage absorption heat pump 7, to carry out stage-by-stage heating.

[0028]...

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Abstract

The invention provides a method for directly feeding primary network returned water in the steam condenser as condensed water and a method for reducing the water outlet temperature of the condensed water of a steam condenser step by step, increasing the water supply temperature of a primary network step by step and improving the power generation efficiency and the heat supply effect. The method comprises a thermal power plant steam extraction heat supply system, a returned water temperature adjusting system, a thermal power plant steam condenser cooling water system and a high-temperature-difference heat supply primary pipe network.

Description

technical field [0001] The invention belongs to the field of improving energy utilization efficiency, and relates to a waste heat recovery system for reducing the temperature of cooling water of a condenser to condense all the cooling water. Background technique [0002] At present, although cogeneration has realized the step-by-step utilization of energy, the condenser of the thermal power plant still needs to discharge a large amount of low-temperature waste heat, and the waste heat discharged is huge. [0003] The state strongly encourages the recovery of waste heat and waste heat, and the recovered heat is used for heating of residents. During the power generation process of thermal power plants, the waste steam after work in the steam turbine needs to be condensed and then sent back to the boiler. The condenser releases the heat into the cold intake water, and through cooling towers or rivers, rivers, lakes, sea water, fans, etc., this part of the heat is removed to red...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24D3/18F24D3/10F22D11/06F01K17/06
CPCY02E20/14F24D3/18F01K17/06F22D11/06F24D3/10F24D2200/126F24D2200/16F24D2220/06
Inventor 姚伟君
Owner DALIAN BAOGUANG ENERGY SAVING AIR CONDITIONING EQUIP
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