JPH0419401Y2 - - Google Patents

Description

[Detailed description of the invention] Field of application in industry This invention recovers steam heat by heat exchange with water from a small amount of steam at atmospheric pressure generated from water-cooled jackets of smelting furnaces, melting furnaces, etc. Regarding a heat recovery tower that is reused as hot water.

Problems that the invention aims to solve Conventionally, the steam generated from water-cooled jackets, etc. had only atmospheric pressure, so it was released into the atmosphere without being able to be used effectively.

The purpose of this invention is to obtain hot water by effectively utilizing the sensible heat of steam pressure in the water column of 20 mm to 1000 mm, which is close to atmospheric pressure, and thereby contribute to energy conservation. .

Means for Solving the Problems In order to achieve the above object, the heat recovery tower according to the present invention has a tower main body, a large surface area, a low ventilation resistance and a low thermal conductivity. A heat exchanger shell filled with a filling made of high-quality metal cutting waste, a steam conduit that introduces steam at a pressure of 20 mm to 1000 mm of water column to the lower part of the heat exchanger shell, and a filling made of metal cutting waste from the upper part. It is characterized by consisting of a water supply pipe for sprinkling water, and a hot water outlet pipe for absorbing steam heat in a filling made of metal cutting waste and extracting it as hot water.

Effect Steam from the steam conduit migrates from the lower part of the heat exchanger shell upwards through the packing therein, while water from the water supply pipe is sprinkled onto the packing from its top, so that water in the packing is absorbs steam heat through heat exchange action and becomes hot water, which is taken out from the lower part of the heat exchanger shell through a hot water take-out pipe. The utilized steam is discharged from the top of the tower body.

Embodiments Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The heat recovery tower consists of a tower body 1 and a heat exchanger shell 2 provided inside the tower body 1.
The inside is filled with a filler 3, such as cutting waste made of brass, stainless steel, etc., which has a large surface area, low gas ventilation resistance, and high thermal conductivity. Reference numeral 4 is a perforated plate that receives the filling 3. A steam chamber/hot water chamber 5 is constructed between the lower part of the heat exchanger shell, that is, the perforated plate 4 and the bottom of the column body 1, and a steam conduit 6 leads to this chamber 5. A hot water outlet pipe 7 communicating with the chamber 5 is installed. A water supply pipe 8 extends downwardly through the column body 1 to the top of the heat exchanger shell and is adapted to supply water to the top of the packing 3. A baffle plate 9 is disposed on the top of the heat exchanger shell, facing the outlet of the water supply pipe 8, for sprinkling water onto the filling. A steam outlet pipe 10 communicating with the inside of the heat exchanger shell is attached to the top of the tower body, and an overflow pipe is connected to the chamber 5 to prevent the hot water accumulated in the room from exceeding a predetermined level. It is provided in the main body 1.

The steam generated from the water-cooled jacket of each of the smelting or melting furnaces is conducted through steam conduit 6 into the lower part or chamber 5 of the heat exchanger shell 2 and then ascends through the packing 3. Water is discharged from the water supply pipe 8 onto the jam plate 9 and is sprinkled on the heat exchanger shell 2 as dispersed water.
falls through the filling 3 inside. During this time, water absorbs steam heat, and if the steam pressure is 20 mm or more and 1000 mm or less in the water column than atmospheric pressure, the steam will
It is collected in chamber 5 as hot water at ~80°C. The collected hot water is taken out to the outside through a hot water take-out pipe 7. The spent steam exits from the steam outlet pipe 10. The hot water temperature can be maintained constant at all times by automatically controlling the amount of endothermic water.

A tower with an inner diameter of 1 mφ and an effective height of 3.4 m was constructed, and 27 m ³ of stainless steel permanent machining waste was used as packing material to perform heat exchange between steam and water. At the inlet steam temperature of approximately 98°C, 0.8t/h, atmospheric pressure plus 25mm, sprinkle cold water temperature of 10°C, and 3t/h, we were able to secure hot water at the tower outlet of 80°C and approximately 3t/h.

Effects of the invention Since the present invention is constructed as described above, it is possible to guide steam that could not be used until now to a heat recovery tower and recover the steam heat as hot water through heat exchange with water, thus saving energy. can make a huge contribution.

[Brief explanation of the drawing]

The accompanying drawing is a schematic diagram of a heat recovery tower for recovering heat from steam at atmospheric pressure according to the present invention. 1... Tower body, 2... Heat exchanger shell, 3...
Filling made of metal cutting scraps, 6... Steam conduit, 8...
Water pipe.

Claims (1)

[Scope of utility model registration request] A column main body, a heat exchanger filled with a metal cutting waste packing having a large surface area, low ventilation resistance and high thermal conductivity, and a water column in the lower part of the heat exchanger shell. A steam conduit that introduces steam at a pressure of 20 mm or more and 1000 mm or less, a water supply pipe that sprinkles water from above onto a filling made of metal cutting waste, and a heating water pipe that absorbs steam heat in the filling made of metal cutting waste. A heat recovery tower comprising: a hot water takeoff pipe for taking out hot water as a hot water.