Efficient water mixing tank for high-temperature cooling water system

Abstract

An efficient water mixing tank for a high-temperature cooling water system is provided with a cylindrical tank body, the tank body is composed of a straight cylinder section in the middle, an outlet end cover and an inlet end cover, the outlet end cover and the inlet end cover are arranged at the two ends, the tank body is horizontally placed, the inlet end cover is connected with high-temperature cooling water, and the outlet end cover is connected with a cooler; the partition plate divides the interior of the box body into a water inlet cavity and a water outlet cavity. A water outlet short pipe is arranged in the water inlet cavity, a water return short pipe is arranged in the water outlet cavity, the water outlet short pipe and the water return short pipe are arranged at the bottom of the box body, the top of the water return short pipe extends into the box body and extends upwards, the top of the water return short pipe is connected with an elbow, the elbow is provided with a nozzle, and the nozzle is aligned with the outlet end cover. The water mixing tank is mainly used for mixing work of a bypass fresh water generator pipeline of high-temperature cooling water, can effectively prevent backflow of the fresh water generator from generating turbulent flow in the water mixing tank and can also prevent the backflow of the fresh water generator from being sucked away by a booster pump of the fresh water generator again, and the working efficiency of the fresh water generator is greatly improved.

Description

Technical Field

[0001] The invention belongs to the field of marine ship design and construction, and in particular relates to a high-efficiency water mixing tank for a high-temperature cooling water system. Background Art

[0002] The high-temperature cooling water system on a ship is a cooling water system used to cool the main engine or generator cylinder liner. The water temperature of the high-temperature water after passing through the main engine or generator cylinder liner can generally reach 90 degrees. The heat of this high-temperature water is generally used to heat the evaporative fresh water generator, heating the seawater to evaporate it, thereby producing fresh water.

[0003] High-temperature water generally does not pass directly through the fresh water generator. Generally, a bypass pipeline is added to facilitate the adjustment of the temperature of the high-temperature water. If a bypass pipe is directly added to the high-temperature water pipeline, turbulence will be caused, so a mixing tank is generally added. The design goal of the system is that when the high-temperature water system passes through the mixing tank, part of the high-temperature water enters the fresh water generator through the booster pump, heats the seawater and flows back to the mixing tank, and then flows out from the outlet of the mixing tank. However, although the conventional mixing tank solves the problem of turbulence, it often creates new problems, that is, the water flow at the inlet and outlet of the fresh water generator will form a circulation in the mixing tank, especially when the water pressure is relatively low, the water at the outlet of the fresh water generator (the water temperature is relatively low) will be sucked away by the booster pump, which will cause the water temperature entering the fresh water generator to drop and cannot meet the use requirements of the fresh water generator. This requires an efficient mixing tank to avoid this situation. Summary of the invention

[0004] In order to solve the above problems, the present invention proposes a high-efficiency mixing water tank for a high-temperature cooling water system, and the technical solution adopted is: A high-efficiency mixing water tank for a high-temperature cooling water system, the mixing water tank has a cylindrical box body, the box body is composed of a straight section in the middle and outlet end covers and inlet end covers at both ends, the box body is placed horizontally, one end is connected to the high-temperature cooling water, and the other end is connected to the cooler, a partition is fixed in the middle of the box body, the partition is vertically arranged, the height of the partition is less than the diameter of the box body, the partition is a curved plate with a straight top, the edge of the partition is fixed to the inner wall of the box body, and there is a gap between the top of the partition and the inner wall of the box body; the partition divides the inside of the box into a water inlet chamber and a water outlet chamber. A short water outlet pipe is arranged in the water inlet cavity, and a short water return pipe is arranged in the water outlet cavity. The short water outlet pipe and the short water return pipe are arranged at the bottom of the box body. The top of the short water return pipe extends into the interior of the box body and extends upward. An elbow is connected to the top. The elbow has a nozzle, and the nozzle is aligned with the outlet end cover.

[0005] The above-mentioned high-efficiency mixing water tank for a high-temperature cooling water system further has a water outlet flange connected to the end of the water outlet short pipe and a water inlet flange connected to the end of the water inlet short pipe.

[0006] The above-mentioned high-efficiency mixing water tank for a high-temperature cooling water system further has a high-temperature water outlet flange fixed on the outlet end cover, and a high-temperature water inlet flange fixed on the inlet end cover.

[0007] The above-mentioned high-efficiency mixing tank for a high-temperature cooling water system further has a flow area between the water inlet chamber and the water outlet chamber that is not less than the inner diameter flow area of ​​the high-temperature water inlet flange.

[0008] The above-mentioned high-efficiency mixing tank for a high-temperature cooling water system, further, has an elbow that is a 90° elbow, and a center axis of the nozzle is the same as a center axis of the tank.

[0009] The present invention discloses a high-efficiency mixing water tank for a high-temperature cooling water system. The manufacturing process is simple, the structure is compact, and the mixing tank can play an efficient mixing role. The mixing tank is mainly used for mixing the bypass fresh water generator pipeline of the high-temperature cooling water. The mixing tank can effectively prevent the return flow from the fresh water generator from generating turbulence in the mixing water tank, and can also prevent the return flow from the fresh water generator from being sucked away by the fresh water generator booster pump again. The working efficiency of the fresh water generator is greatly improved, and the circulation and cooling effect of the high-temperature cooling water are also improved. At the same time, the workload of the cooler is reduced, and the energy efficiency is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the structure of the mixing tank; Figure 2 It is a schematic diagram of the application of the mixing tank in the system; Among them: 1-high temperature water inlet flange, 2-box, 3-partition, 4-high temperature water outlet flange, 5-outlet short pipe, 6-outlet flange, 7-elbow, 8-return short pipe, 9-return flange, 10-nozzle, 11-outlet end cover, 12-inlet end cover, 13-water inlet chamber, 14-outlet chamber. DETAILED DESCRIPTION

[0011] The present invention will be further described in conjunction with the accompanying drawings. Example

[0012] A high-efficiency mixing tank for a high-temperature cooling water system, such as Figure 1 As shown, the box body 2 is a cylindrical structure, a hemispherical inlet cover 12 is welded to the high-temperature cooling water inlet end, and a hemispherical outlet cover 11 is welded to the outlet end, forming a cylindrical cavity as a whole, which is the main structure of the present invention.

[0013] The high temperature water inlet flange 1 is connected to the inlet end cover 12, and the high temperature cooling water can enter the box body 2 from the inlet flange 1. The high temperature water outlet flange 4 is connected to the outlet end cover 11, so that the high temperature cooling water can flow out from the box body 2 through the flange 4.

[0014] A semicircular partition 3 is installed in the middle position inside the box body 2. The height of the partition 3 is slightly higher than the center line of the box body 2, which is used to divide the box body 2 into two parts, the water inlet chamber 13 and the water outlet chamber 14. However, it is necessary to ensure that the flow area of ​​the unclosed part between the two cavities is not less than the inner diameter flow area of ​​the high-temperature water inlet flange 1.

[0015] On one side of the water inlet cavity 13, a water outlet short pipe 5 is welded through the bottom of the box body 2 to supply water to the fresh water generator booster pump 22. A water outlet flange 6 is welded at the end of the water outlet short pipe 5 to facilitate pipeline connection. The water outlet short pipe 5 does not need to be inserted into the interior of the box body 2, and can be connected flush with it.

[0016] On one side of the water outlet chamber 14, a short return pipe 8 is welded through the bottom of the box body 2, and a return flange 9 is welded at the end, which is used to connect the return pipe from the fresh water generator 23. The short return pipe 8 penetrates the box body 2, and penetrates into the center of the box body 2 and is welded to the elbow 7. The elbow 7 is a 90-degree elbow, and the outlet center is the same and consistent with the center of the box body 2. A nozzle 10 is welded at the outlet of the elbow 7, which is aligned with the high-temperature water outlet flange 4 to ensure that the return water from the fresh water generator 23 can be directly sprayed into the high-temperature water outlet flange 4. Schematic diagram of water mixing tank installation work Figure 2 As shown, during operation, high-temperature cooling water flows out from the outlet of the main engine 20 and enters the high-efficiency mixing water tank 21 of the present invention. Part of the high-temperature cooling water is sucked away from the water inlet chamber 13 through the water outlet flange 6 by the fresh water generator booster pump 22 and enters the fresh water generator 23 to heat seawater for evaporation to produce fresh water. After that, the high-temperature cooling water flows out from the outlet of the fresh water generator 23 and flows back to the water outlet chamber 14 of the high-efficiency mixing water tank 21 through the return flange 9. After the return water is mixed with the high-temperature cooling water, it flows out from the outlet of the high-efficiency mixing water tank 21, flows into the cooler 25 through the temperature control valve 24, cools the high-temperature cooling water, and the cooled cooling water flows back to the main engine 20 to complete the cycle.

Claims

1. A high-efficiency mixing tank for a high-temperature cooling water system, characterized in that: The mixing water tank has a cylindrical box body, which is composed of a straight section in the middle and outlet and inlet end covers at both ends. The box body is placed horizontally, the inlet end cover is connected to the high-temperature cooling water, and the outlet end cover is connected to the cooler. A partition is fixed in the middle of the box body. The partition is vertically arranged, and the height of the partition is less than the diameter of the box body. The partition is an arc-shaped plate with a straight top. The edge of the partition is fixed to the inner wall of the box body, and there is a gap between the top of the partition and the inner wall of the box body. The partition divides the inside of the box into a water inlet chamber and a water outlet chamber. A short water outlet pipe is arranged in the water inlet cavity, and a short water return pipe is arranged in the water outlet cavity. The short water outlet pipe and the short water return pipe are arranged at the bottom of the box body. The top of the short water return pipe extends into the interior of the box body and extends upward. An elbow is connected to the top. The elbow has a nozzle, and the nozzle is aligned with the outlet end cover.

2. The high-efficiency water mixing tank for a high-temperature cooling water system according to claim 1, characterized in that: The end of the water outlet short pipe is connected with a water outlet flange, and the end of the water inlet short pipe is connected with a water inlet flange.

3. The high-efficiency water mixing tank for a high-temperature cooling water system according to claim 1, characterized in that: A high-temperature water outlet flange is fixed on the outlet end cover, and a high-temperature water inlet flange is fixed on the inlet end cover.

4. The high-efficiency water mixing tank for a high-temperature cooling water system according to claim 3, characterized in that: The flow area between the water inlet cavity and the water outlet cavity shall not be less than the inner diameter flow area of ​​the high-temperature water inlet flange.

5. The high-efficiency water mixing tank for a high-temperature cooling water system according to claim 1, characterized in that: The elbow is a 90° elbow, and the center axis of the nozzle is the same as the center axis of the box.

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