Device and method utilizing semi-water gas low-temperature exhaust heat to generate electricity
A technology of low-temperature waste heat and semi-water gas, which is applied in the fields of mechanical equipment, climate sustainability, machines/engines, etc., can solve the problems of power shortage and low utilization rate of waste heat, so as to alleviate the power shortage, improve utilization efficiency, and reduce initial The effect of investment
Inactive Publication Date: 2012-12-12
TIANJIN UNIV
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Problems solved by technology
[0005] In order to solve the problems existing in the prior art, the present invention provides a device and method for generating electricity by utilizing the low-temperature waste heat of semi-water gas to solve the dual problems of low waste heat utilization rate and power shortage in existing large-scale chemical enterprises
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[0019] The equipment and method of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0020] Such as figure 1 As shown, in the original process, the semi-water gas (220°C) enters the cooling heat exchanger through the pipeline at the outlet of the gas generator, and the heat is taken away by the cooling water, and the semi-water gas is cooled to the temperature required by the process and enters the subsequent process flow. The cooling water enters the cooling tower and dissipates the heat it carries to the atmosphere.
[0021] The present invention uses the waste heat of the semi-water gas to generate electric power, and adopts the low-temperature generating set 5 to replace the cooling heat exchanger 2 in the original process, and the connection schematic diagram is as follows figure 2 shown. This unit directly replaces the cooling heat exchanger in the original process, and continues to use the cooling water pump and ...
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The invention discloses a device and a method utilizing semi-water gas low-temperature exhaust heat to generate electricity. Cooling heat exchangers in the prior art are replaced by at least one low-temperature waste heat generator set, waste heat echelon multi-level recycle is adopted, different organic working media are selected aiming at waste heat with different quality, matching degree between generating devices and technology production lines is improved, and initial investment is reduced as far as possible. The device utilizing semi-water gas low-temperature exhaust heat to generate electricity utilizes low-temperature heat sources between 220DEG C and 70 DEG C and adopts specific working media circulation to generate high-grade electric energy, and the electric power can be self-used or supplied to a grid. Moreover, the method utilizing semi-water gas low-temperature exhaust heat to generate electricity can flexibly control cooled semi-water gas temperature to meet technology requirements, thereby well solving the problems that existing large-scale chemical enterprises are low in low-temperature waste heat recovery rate, only aim at recycle of technology tail end waste heat, and cannot effectively recycle low-temperature waste heat during the production technology process, and relieving the situation of electric power shortage of existing industrial production.
Description
technical field [0001] The invention relates to a method and device for recovering waste heat of gaseous substances and generating electricity, and particularly refers to recovery and utilization of waste heat of gaseous substances that need to be cooled in process production, such as semi-water gas or rectification process. Background technique [0002] Since entering the "Twelfth Five-Year Plan", energy conservation has been mentioned to an unprecedented level. The recycling of industrial waste heat is playing an increasingly important role in the arena of energy conservation. Taking industrial waste heat as an example, 50% of the heat energy used by human beings is finally discharged directly in the form of low-grade waste heat. Industrial waste heat is generally divided into high-temperature waste heat above 600°C, medium-temperature waste heat between 600°C and 230°C, and low-temperature waste heat below 230°C. In recent years, technologies for recovering flue gas and...
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Login to View More IPC IPC(8): F01K27/00
CPCY02P80/15
Inventor 张于峰邓娜董胜明于晓慧张彦
Owner TIANJIN UNIV