Oil field waste heat utilization system based on absorption refrigeration

An absorption refrigeration and waste heat technology, applied in refrigerators, adsorption machines, refrigeration and liquefaction, etc., can solve problems such as low efficiency and single application direction, achieve a small number of parts, high density of working medium, and improve energy utilization. The effect of efficiency

Active Publication Date: 2019-07-30
XI AN JIAOTONG UNIV
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Problems solved by technology

However, at present, there are problems such as low efficiency and single application direction of waste heat utilization in oilfield sewage, and it is necessary to further improve energy conversion efficiency

Method used

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  • Oil field waste heat utilization system based on absorption refrigeration

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Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] refer to figure 1 , An oilfield waste heat utilization system based on absorption refrigeration provided by the present invention includes a generator 2, a condenser 3, an expansion valve 4, an evaporator 5, an absorber 7, a solution pump 8, a pressure reducing valve 9, a supercritical carbon dioxide Turbine 10, generator 11, supercritical carbon dioxide cooler 12 and supercritical carbon dioxide compressor 13, wherein the supercritical carbon dioxide turbine 10 adopts a centripetal turbine, the shaft of which is connected to the shaft of the generator 11, and the supercritical carbon dioxide compressor 13 using centrifugal compressor.

[0022] When the oilfield waste heat utilization system is in operation, the oilfield sewage waste heat 1 heats the refrigerant solution in the generator 2, and most of the low-boiling refrigerant in it evaporates and enters the...

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Abstract

The invention discloses an oil field waste heat utilization system based on absorption refrigeration. The oil field waste heat utilization system based on absorption refrigeration comprises an absorption refrigeration system and a supercritical carbon dioxide power generation system, wherein a refrigerant solution and refrigerant steam in an oil field waste heat heating generator exchange heat with a supercritical carbon dioxide working medium in a supercritical carbon dioxide power generation system in a condenser; the working medium absorbs heat so as to be warmed to enter a turbine for working through expansion, is connected with a power generator for generating power, and is then cycled through a supercritical carbon dioxide cooler and a supercritical carbon dioxide compressor; and therefrigerant solution enters an evaporator through an expansion valve, is evaporated to absorb heat so as to produce cold water for an air conditioner, is then mixed with a low-concentration refrigerant solution in an absorber so as to recover a high-concentration refrigerant solution state, and returns into the generator through a solution pump. The invention builds the oil field waste heat utilization system integrating cooling and low-temperature heat source power generation into a whole, the waste heat of oil field waste water is multi-stage utilized, the energy utilization efficiency is improved, and the system is compact in structure and has an important engineering significance.

Description

technical field [0001] The invention relates to a waste heat utilization system, in particular to an oil field waste heat utilization system based on absorption refrigeration. Background technique [0002] After years of development, most oilfields in my country have entered the middle and late stages. The water content of oilfields is very high. Almost all oilfields have a large amount of sewage resources. The temperature is about 40-70℃. The waste heat of oilfield sewage belongs to shallow geothermal energy. Effective utilization of the entrained heat is an important means to realize the development of oilfield circular economy and improve operating efficiency. As far as the current application fields of waste heat are concerned, sewage waste heat is mainly used in two aspects: one is for the production and transportation of crude oil, which is mainly used to heat crude oil to prevent it from condensing; the other is for civil heating, mainly serving oil fields. Internal r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B15/06F25B15/04F25B27/02F01K25/10
CPCF01K25/103F25B15/04F25B15/06F25B27/02Y02A30/274Y02B30/625
Inventor 谢永慧王雨琦张荻
Owner XI AN JIAOTONG UNIV
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