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Heat recovery system

a heat recovery and cooling system technology, applied in the direction of positive displacement liquid engines, heating types, lighting and heating apparatuses, etc., can solve the problems of not being able to adjust the feedwater or its amount according to a use load, not being able to cool compressed air and lubricant, and not having the existing cooling system originally provided for the compressor

Inactive Publication Date: 2012-04-19
MIURA COMPANY LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0030]The present invention can implement the heat recovery system in which the existing compressor cooling system remains as it is while the heat of compression can be recovered. In the preferred embodiments, the heat recovery system can be operated according to the use load of the hot water or can be operated in such a manner as to obtain the hot water at a desired temperature. Hence, even if the amount or temperature of the hot water obtained is adjusted, the system cannot influence the cooling operation in the compressor.

Problems solved by technology

Thus, no existing cooling system originally provided for the compressor remains.
In addition, it is impossible to adjust the feedwater or its amount according to a use load (i.e., required amount) of hot water obtained by causing the air to pass through each of the coolers.
For example, even in the case of no or little use of the hot water or stoppage of production of the hot water, the stoppage of production of the hot water signifies the stoppage of supply of cooling water to each of the coolers, thereby making it impossible to cool the compressed air and the lubricant.
Thus, the hot water cannot be produced according to the use load of the hot water.
In other words, the hot water having the desired temperature cannot be obtained.

Method used

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first preferred embodiment

[0036]FIG. 1 is a view schematically showing a heat recovery system in a first preferred embodiment according to the present invention.

[0037]A heat recovery system 1 in the present preferred embodiment is a system for recovering the heat of compression in an oil lubrication type (oil supply type) and water cooling type motor air compressor. Specifically, the heat recovery system 1 is adapted to cool compressed air or a lubricant and heat feedwater to a feedwater tank 5 by indirectly exchanging heat between the compressed air or the lubricant from a compressor 2 and feedwater from a water softener 3 to the feedwater tank 5 in a boiler 4.

[0038]The heat recovery system 1 in the present preferred embodiment includes, as essential components; the compressor 2 for taking in, compressing, and discharging outside air; a motor 6 for driving the compressor 2; an oil separator 7 for separating the lubricant from the compressed air; a first air cooler 8 and a second air cooler 9 for cooling the...

second preferred embodiment

[0055]FIG. 2 is a view schematically showing a heat recovery system 1 in a second preferred embodiment according to the present invention.

[0056]The heat recovery system 1 in the second preferred embodiment also is basically similar to the heat recovery system 1 in the first preferred embodiment. Hence, a description will be mainly given of differences between the first and second preferred embodiments. The same component parts are designated by the same reference numerals.

[0057]In the first preferred embodiment, all of the compressed air from the compressor 2 is fed to the first air cooler 8 via the second air cooler 9. In contrast, in the second preferred embodiment, the second air cooler 9 can be switched or the distribution rate can be changed by switching the second air cooler 9. For the purpose of this, a bypass air feed path 25 connects the inlet and outlet of the second air cooler 9 to each other, and further, a three-way valve 26 is disposed at a branch portion between the a...

third preferred embodiment

[0059]FIG. 3 is a view schematically showing a heat recovery system 1 in a third preferred embodiment according to the present invention and showing only differences from the first and second preferred embodiments.

[0060]The heat recovery system 1 in the third preferred embodiment also is basically similar to the heat recovery system 1 in the first and second preferred embodiments. Hence, a description will be mainly given of differences between the third preferred embodiment and the first and second preferred embodiments. The same component parts are designated by the same reference numerals.

[0061]In the first and second preferred embodiments, the second air cooler 9 and the second oil cooler 11 are connected in series to each other such that the water flows in order to the feedwater tank 5. In contrast, in the present third preferred embodiment, the second air cooler 9 and the second oil cooler 11 are connected in parallel to each other such that water to the feedwater tank 5 is br...

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Abstract

A heat recovery system includes a first air cooler for cooling compressed air from a compressor, a first oil cooler for cooling a lubricant from the compressor, and a second air cooler and / or a second oil cooler serving as a heat recovering heat exchanger. The second air cooler heats water with the heat of the compressed air to be fed to the first air cooler. In contrast, the second oil cooler heats water with the heat of a lubricant to be fed to the first oil cooler.

Description

INCORPORATION BY REFERENCE[0001]The present application claims priority under 35 U.S.C. §119 to Japanese Patent Application No. 2010-234271 filed Oct. 19, 2010. The content of the application is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a heat recovery system for recovering heat of compression in an air compressor.[0004]2. Description of the Related Art[0005]There has been known a heat recovery system in which compressed air or a lubricant from a compressor is cooled by using feedwater to a feedwater tank in a boiler, and further, the feedwater to the feedwater tank is heated. Specifically, water is supplied to the feedwater tank in the boiler via an air cooler and an oil cooler, and then, the compressed air is cooled in the air cooler whereas the lubricant from the compressor is cooled in the oil cooler, wherein both of the coolers heat the feedwater to the feedwater tank.[0006]H...

Claims

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Application Information

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IPC IPC(8): F25B29/00
CPCF25B29/00F04B39/02F04B39/06F04C29/02F04C29/04F22B1/1838F22D11/00F04B39/0215F24D11/005F24D19/1051F24D2200/16F24D2220/042
Inventor OKAMOTO, YUSUKEOOTANI, KAZUYUKI
Owner MIURA COMPANY LIMITED
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