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Brown coal predrying power generation system integrated with absorption heat pump

A technology of absorption heat pump and power generation system, which is applied in adsorption machines, drying solid materials, drying gas layout, etc., can solve problems such as low energy utilization efficiency, and achieve the effect of improving power generation efficiency and reducing energy consumption

Active Publication Date: 2014-08-06
XI AN JIAOTONG UNIV
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Problems solved by technology

However, the energy utilization efficiency is low when it is directly burned for power generation

Method used

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  • Brown coal predrying power generation system integrated with absorption heat pump

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0016] see figure 1 , the present invention includes a coal-fired power generation system consisting of a boiler 1, a steam turbine generator set 2, a condenser 3, a condensate pump 4, a heat recovery system 5, a steam turbine extraction 6 and a generator, and also includes a raw coal inlet and a raw coal The rotary drum dryer 7 at the exit is connected successively to form the generator 9, condenser 10, evaporator 12 and absorber 14 of the circulation loop; wherein the outlet of the heating tube bundle of the rotary drum dryer 7 is sequentially connected with the absorber through the pipeline. 14. The heat exchange tubes in the condenser 10 are connected, and the outlet of the heat exchange tube of the condenser 10 is connected with the inlet of the heating tube bundle of the rotary drum dryer 7 through a pipeline to form a circulation loop; the exhaust gas ...

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Abstract

The invention relates to a brown coal predrying power generation system integrated with an absorption heat pump. The brown coal predrying power generation system comprises a rotary roller dryer, a generator, a condenser, an evaporator and an absorber, wherein the generator, the condenser, the evaporator and the absorber are sequentially communicated to form a circulation loop; an outlet of a heat tube nest of the rotary roller dryer is sequentially communicated with the absorber and a heat exchanging tube in the condenser through pipelines; an outlet of the heat exchanging tube in the condenser is connected with an inlet of the heat tube nest of the rotary roller dryer through pipelines to form the circulation loop; and an inlet of the heat exchanging tube in the generator is communicated with extracted steam from a steam turbine of a steam turbine generator set of a coal-burning power generation system through the pipeline, and an outlet of the heat exchanging tube in the generator is communicated with the heat regenerative system through the pipeline. For the brown coal predrying power generation system, the extracted steam from the steam turbine is used for driving the absorption heat pump, the evaporator is used for recycling and drying the heat of tail gases, and the heat released by the heat pump absorber and the condenser is used for predrying brown coal, thereby effectively reducing the energy consumption in the brown coal drying process and improving the power generation efficiency of the brown coal predrying power generation system.

Description

technical field [0001] The invention relates to a lignite pre-drying power generation system, in particular to a lignite pre-drying power generation system integrated with an absorption heat pump. Background technique [0002] Lignite is the coal with the lowest degree of coalification. It has high moisture content, low calorific value, high unit energy transportation cost, but low price. The proven reserves of lignite in my country reach 130 billion tons, accounting for 13% of the country's total coal reserves. With the intensification of the contradiction between the supply and demand of coal in my country, lignite will become the main fuel of my country's thermal power industry in the future. However, the energy utilization efficiency is low when it is directly burned for power generation. Pre-drying lignite and reducing the moisture in lignite before it enters the boiler is an effective means for efficient utilization of lignite. However, lignite drying requires a lot ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F26B17/32F26B21/00F26B25/00F25B15/00F01D15/10
CPCY02B30/62Y02A30/27
Inventor 严俊杰刘明种道彤刘继平邢秦安王进仕
Owner XI AN JIAOTONG UNIV
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