JPS609530Y2 - Warm wastewater recovery water supply heating tank - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a heated wastewater recovery tank used to collect high-temperature wastewater discharged from various machines, equipment, etc. and supply high-temperature water to locations where it is required.

Recently, from the perspective of energy conservation, high-temperature water discharged from various machines and equipment, such as hot water discharged when cooling compressors, steam drains, or hot water produced by heat recovery of combustion exhaust gas, is being collected for water supply to boilers, etc. has been done.

Conventionally, the tanks used to collect hot water have been just tanks, and there is a temperature difference in the hot water that flows into the tank, making it difficult to meet the demand for quick use of high-temperature water. There wasn't.

On the other hand, conventionally, in order to supply heated water to the boiler, the fourth
As shown in the figure, the water in the soft water tank 15 is transferred to the water supply pump 5.
Steam is sent to the deaerator 51 from the steam pipe 52 to heat the water in the deaerator 51, and after reducing the amount of oxygen in the water, the water in the deaerator 51 is was supplied to the boiler 24 through an economizer 23 by a water supply pump 21.

As mentioned above, since the deaerator 51 is supplied with steam, its internal pressure is higher than atmospheric pressure, so it becomes a pressure vessel.
In addition, in order to obtain a sufficient head of water for the feedwater pump 21 of the boiler 24, it was necessary to install it at the top of the tower 53, and the tower was of an elevated type.

Therefore, the conventional boiler feed water heating system has the disadvantage that equipment costs, foundation work costs, etc. are high.

In consideration of the above, this idea recovers high-temperature water discharged from various machines and equipment, and can quickly utilize the high-temperature water. When used for water supply to boilers, etc., it is faster than conventional boiler feed water heating devices. The purpose of this invention is to provide a hot water recovery type water supply heating tank that can reduce equipment costs, foundation construction costs, etc.

Next, this invention will be explained based on embodiments shown in the drawings.

In FIGS. 1 and 2, a warm wastewater recovery type water supply heating tank 1 (hereinafter referred to as a water supply tank) is shown.

) has a circular cross section, and a heat insulating material 2 is attached to the outside except for the bottom plate 1a.

The water supply tank 1 has a water supply port 3 on the lower side, and a perforated plate 4 having a large number of holes is provided inside the water supply port 3 at right angles to the center line of the water supply tank 1.

Above the perforated plate 4, a second perforated plate 5 having the same shape as the perforated plate 4 is placed at a predetermined distance from the perforated plate 4.
And they are installed in parallel.

The water supply inner pipe 6 having an opening 6a at the upper end is provided at the center of the water supply tank 1, and its lower end is curved approximately 90' above the second perforated plate 5 to the side of the water supply tank 1. The outlet pipe 6b is covered with a protruding waist insulation material 2a.

The water supply inner pipe 6 has a vertical groove 6C cut downward from the opening 6a, and its lower end reaches the upper part of the curved part.

The steam blowing ring 7 is a ring-shaped pipe in order to prevent noise and vibration during steam blowing, and is connected to the lower end of the steam pipe 8 that is installed through the upper part of the water tank 1 in an airtight manner. has been done.

This steam blowing ring 7 is provided concentrically on the outside of the water supply inner pipe 6, and is located below the opening 6a of the water supply inner pipe 6, and has a small hole for steam blowing on its upper surface. Many 7a are opened.

A collection pipe 9 for collecting heated wastewater is provided to pass through the upper part of the water supply tank 1 in an airtight manner, and an opening 9 at the lower end thereof is provided.
a is located below the opening 6 a of the inner water supply pipe 6 and above the steam blowing ring 7 .

A baffle plate 10 is attached to the lower end of the recovery pipe 9 below the opening 9a for scattering the hot water flowing down inside the recovery pipe 9 in all directions.

The upper end 11a of the ventilation pipe 11 is provided at the top of the water tank 1, and after exiting to the top of the water tank 1, the ventilation pipe 11 passes through the water tank 1 again, and the lower end 11b is installed at the bottom of the water tank 1. It protrudes outward from above 1a.

The drain pipe 12 is used to drain water from the water tank 1, and is attached to the bottom 1a of the water tank 1 from below.

The emergency bypass port 13 is provided at a position approximately 90 degrees different from the water supply port 3, and is used when the amount of water in the water supply tank 1 has decreased and there is an urgent need to supply water.

Next, an embodiment in which the water supply tank 1 having the above configuration is connected to the downstream side of the water pipe for compressor cooling hot waste water, and the hot waste water discharged from the compressor is stored in the water supply tank 1 and water is supplied to the boiler. I will explain about it.

In FIG. 3, a water supply tank 1 has a water supply port 3 connected to a softening water tank 15 through a communication pipe 14, and a recovery pipe 9 connected to a water softening tank 15 through a water supply pipe 16 for softening water to remove Ca, Mg, etc. from the water. 17.

The softener 17 is connected to a compressor 19 via a line 28 with a switching valve 18 .

In addition, the water supply tank 1 has a steam pipe 8 connected to a steam supply pipe 20 as an auxiliary heat source, and an outlet pipe 6b of the water supply tank 1 is connected to a water supply pipe 22 having a water supply pump 21, and an economizer for heating the water supply. -23.

The economizer 23 is further connected to a boiler 24.

The water pipe 29 is used when the economizer 23 is not provided, and connects the water supply pump 21 and the boiler 24.

Note that water from a water tank 25 is sent to the compressor 19 by a raw water pump 26.

Further, the switching valve 18 is also connected to a cooling tower 27.

In this embodiment, when the compressor 19 is connected to the softener 17 by the switching valve 18 and the raw water pump 26 and compressor 19 are operated simultaneously, the raw water pump 26
The cooling water that has been pressure-fed and cooled the compressor 19 is discharged from the compressor 19 as heated waste water,
It is sent to the softener 17 via the switching valve 18.

The heated wastewater that has flowed into the softener 17 is softened here and then flows into the recovery pipe 9 of the water supply tank 1 via the water supply pipe 16.
The direction of the flow is changed by the baffle plate 10 to the side and upward and flows into the water supply tank 1.

Inside the water supply tank 1, cold and hot water is at the bottom, and hot water is at the top.

Most of the hot water in the water supply tank 1 from the upper part, where the temperature is high, flows into the water supply inner pipe 6 from the opening 6a of the water supply inner pipe 6, and a part flows into the water supply inner pipe 6 from the vertical groove 6c, and flows into the water supply inner pipe 6 from the outlet pipe 6b. After flowing into the water supply pipe 22, the water is sent to the boiler 24 via the economizer 23 by the water supply pump 21.

If the amount of heated wastewater flowing in from the recovery pipe 9 is
If there is not enough water to supply water to the water tank 4, the soft rice in the soft water tank 15 is fed into the water tank 1 from the water supply port 3.

In this way, the cold water flowing in from the water supply port 3 flows through the first multi-top plate 4.
When passing through the second multi-top plate 5 and rising, the flow becomes slow and uniform as it passes through a large number of small holes, and the temperature range (boundary area between the low temperature region and the high temperature region) inside the water supply tank 1 increases. ), so that only the high-temperature water in the upper part of the water tank 1 is supplied to the boiler 24 even at this time.

When the water temperature in the water supply tank 1 is low, steam is sent from the steam supply pipe 20, and is supplied from the steam blowing ring 7 via the steam pipe 8 until the water temperature in the water supply tank 1 reaches an appropriate temperature. .

The water vapor accumulated in the upper part of the water supply tank 1 passes through the ventilation pipe 11, is cooled and condensed by the cold water at the bottom of the water supply tank 1, and after heating the cold water, the lower end 11
b is discharged to the outside.

In the above embodiment, the heated waste water discharged from the compressor is supplied to the feed water heating tank, but it goes without saying that the device that supplies the heated waste water is not limited to the compressor.

As mentioned above, this idea is to provide a water supply port for taking in cold water from the outside to a tank that accommodates heated wastewater at the bottom, a perforated plate on the inside above the water supply port, and a perforated plate above the perforated plate. A heated water recovery and heating water supply tank is constructed by providing a hot water recovery pipe and a hot water take-out pipe having an opening at the top, and further providing a steam blowoff pipe having an upwardly opened steam blowout port above the perforated plate. By doing this, the water temperature in the water tank can be adjusted to the appropriate temperature using steam.
The high temperature water at the top of the tank can be quickly supplied to the outside.

If this heated water supply tank is used to supply water to a boiler, the equipment cost will be approximately 172 yen compared to the conventional one, and it will be possible to use heated waste water discharged from various machines, etc.
The energy saving effect (fuel saving) of boilers is very large.

Furthermore, this heated water tank is equipped with a deaerator or economizer.
Also available for boilers without.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the heated wastewater recovery heating water supply tank of this invention, with Figure 1 being a longitudinal sectional view of the tank, Figure 2 being a sectional view taken along the line ■-■ in Figure 1, and Figure 2 being a sectional view taken along the Figure 3 is a diagram of a system in which the heated waste water recovery heating water supply tank of this invention is used for water supply to a boiler, and Figure 4 is a diagram of a conventional boiler water supply system. 1...Water tank, 3...Water inlet, 4
...Perforated plate, 5...Second perforated plate, 6.
...Water supply inner pipe, 6a...Opening, 7...
...Steam blowing ring, 7a...Small hole, 9...Recovery pipe, 9a...Opening.

Claims (1)

[Scope of utility model registration request] It accommodates heated wastewater discharged from various machines and equipment,
In a tank for supplying other equipment, etc., a perforated plate is installed inside the tank to prevent the high-temperature water in the upper part from mixing with the cold water in the lower part, and collection pipes for heated wastewater each having an opening above the perforated plate. A steam outlet pipe having a steam outlet opening upward is provided above the perforated plate, and a water supply port for taking in cold water is provided below the perforated plate. Warm wastewater recovery water supply heating tank.