CN116558341A - A thermal storage spherical tank water distributor - Google Patents

Abstract

The present invention proposes a thermal storage type spherical tank water distributor, which includes a spherical tank body, an upper water distributor arranged on the upper part of the inner cavity of the spherical tank body, and a lower water distributor arranged at the lower part of the inner cavity. The water distributor includes several first water distribution pipes, and the first water inlet and outlet pipes connected with each first water distribution pipe, and the lower water distributor includes several second water distribution pipes, and the first water distribution pipes connected with each second water distribution pipe The second water inlet and outlet pipes, each of the first water distribution pipe and the second water distribution pipe are provided with several spraying structures. Utilizing the density difference characteristics of the water medium at different temperatures, the density of high-temperature water is small, and the density of low-temperature water is large, so that the arrangement of cold and hot tanks can be realized, and the number of spherical tanks can be reduced during use, reducing project investment.

Description

A thermal storage spherical tank water distributor

【Technical field】

The invention relates to the technical field of spherical tank heat storage, in particular to a heat storage type spherical tank water distributor.

【Background technique】

At present, large-scale low-valley energy storage projects include pumped storage power stations, flywheel energy storage, compressed air energy storage, etc. Generally speaking, compressed air energy storage has certain advantages. The compressed air energy storage system involves the heat storage of high-temperature hot water. The heat generated by the air compression process is used to generate high-temperature hot water through the heat exchanger for storage. When the high-pressure air passes through the turbine to generate power, the heat in the hot water is released to heat the compressed air. The heat utilization of the system can effectively improve the power generation efficiency of the energy storage power station. In addition, the use of low-valley electricity for high-temperature heat storage can also be used in heating and other occasions. Large-scale high-temperature and high-pressure heat storage systems use spherical tanks for heat storage, which are more economical and occupy a small area. Therefore, the heat storage and heat release of high-temperature hot water are very important, which directly affects the efficiency and economy of the power station.

At present, high-temperature and high-pressure spherical hot water storage tanks are generally used in compressed air energy storage systems. The structure of the heat storage spherical tank water distributor directly affects the heat storage and heat release efficiency. If there is no water distributor or the water distributor is not effective, it may cause a "short circuit" inside the spherical tank, and the heat storage and heat release of the spherical tank cannot reach the design. 60% of the parameters.

【Content of invention】

The purpose of the present invention is to solve the problems in the prior art, and propose a heat storage type spherical tank water distributor, which can ensure the uniform temperature of the heat storage medium in the spherical tank and ensure sufficient heat storage; at the same time, it can also ensure that the spherical tank The inner medium is fully exothermic.

In order to achieve the above object, the present invention proposes a thermal storage type spherical tank water distributor, which includes a spherical tank body, an upper water distributor arranged on the upper part of the inner cavity of the spherical tank body, and a lower water distributor at the lower part of the inner cavity. The upper water distributor includes several first water distribution pipes, and the first water inlet and outlet pipes connected with each first water distribution pipe, and the lower water distributor includes several second water distribution pipes, and the first water distribution pipes connected with each second water distribution pipe. The second water inlet and outlet pipes connected by the water distribution pipes, and the first water distribution pipes and the second water distribution pipes are provided with several spraying structures.

Preferably, the upper water distributor includes several layers of first water distribution pipe layers arranged at intervals along the height direction, and the first water distribution pipe layer includes several first water distribution pipes arranged in sequence from the inside to the outside. The two first water distribution pipes are connected through the first connecting pipe.

As a preference, the lower water distributor includes several layers of second water distribution pipe layers arranged at intervals along the height direction, and the second water distribution pipe layer includes several second water distribution pipes arranged sequentially from the inside to the outside. The two second water distribution pipes are communicated through the second connecting pipe.

As a preference, both the first water distribution pipe and the second water distribution pipe adopt annular ring pipes.

Preferably, the first water distribution pipe and the second water distribution pipe are respectively provided with several rows of spraying structures.

Preferably, the spraying structure on the first water distribution pipe is arranged inclined upwards, the spraying structure of the second water distribution pipe is arranged inclined downward, and the spraying structure forms a certain angle b with the horizontal plane.

Preferably, the first water distribution pipe and the second water distribution pipe are respectively provided with two rows of spraying structures, and the two rows of spraying structures form a certain angle a.

Preferably, the injection structure is an injection hole or a nozzle.

Beneficial effects of the present invention:

1. Using the density difference characteristics of water medium at different temperatures, the density of high-temperature water is small, and the density of low-temperature water is large, which can realize the arrangement of cold and hot tanks in the same tank, reduce the number of spherical tanks and reduce project investment during use.

2. During the heat storage process, high-temperature water enters the spherical tank from the top of the spherical tank through the upper water distributor, and gradually discharges low-temperature water from the bottom of the spherical tank through the lower water distributor until all the high-temperature water in the spherical tank is stored. before the end. During the exothermic process, the low-temperature water enters the spherical tank from the bottom of the spherical tank through the lower water distributor, and gradually discharges the high-temperature water from the top of the spherical tank through the upper water distributor until all the high-temperature water in the spherical tank is output, and all the inside of the tank is replaced. When it becomes low-temperature water, the heat release ends. During the heat storage process and the heat release process, the thermocline water in the spherical tank accounts for less than 3% of the total water in the spherical tank.

The features and advantages of the present invention will be described in detail with reference to the accompanying drawings.

【Description of drawings】

Fig. 1 is a schematic diagram of the internal structure of a heat storage type spherical tank water distributor of the present invention;

Fig. 2 is a schematic structural view of the lower water distributor of a thermal storage type spherical tank water distributor of the present invention;

Fig. 3 is a top view of the lower water distributor of a thermal storage type spherical tank water distributor of the present invention;

Fig. 4 is a schematic cross-sectional structure diagram of the second water distribution pipe of a heat storage type spherical tank water distributor according to the present invention.

【Detailed ways】

Referring to Fig. 1 to Fig. 4, a thermal storage type spherical tank water distributor of the present invention includes a spherical tank body 10, an upper water distributor 1 arranged on the upper part of the inner cavity of the spherical tank body 10, and a water distributor at the lower part of the inner cavity. The lower water distributor 2, the upper water distributor 1 includes several first water distribution pipes 11, and the first water inlet and outlet pipes 12 communicated with each first water distribution pipe 11, the lower water distributor 2 includes several first water distributors Two water distribution pipes 21, and the second water inlet and outlet pipes 22 connected with each second water distribution pipe 21, each of the first water distribution pipe 11 and the second water distribution pipe 21 are provided with several spraying structures. By setting the upper water distributor on the top of the spherical tank for hot water in and out, and the lower water distributor for cold water in and out at the bottom, the heat storage process can make the temperature of the medium in the spherical tank uniform, reach the rated temperature value, and release heat The process can release all the high-temperature medium, and at the end of the heat release, the tank is filled with low-temperature water medium.

Further, referring to Fig. 1 to Fig. 3, the upper water distributor 1 includes several layers of the first water distribution pipe layer arranged at intervals along the height direction, and the first water distribution pipe layer includes several first water distribution pipe layers arranged sequentially from the inside to the outside. A water distribution pipe 11, and two adjacent first water distribution pipes 11 communicate through a first connecting pipe. The lower water distributor 2 includes several layers of second water distribution pipe layers arranged at intervals along the height direction. The second water distribution pipe layer includes several second water distribution pipes 21 arranged sequentially from the inside to the outside. The second water distribution pipes 21 communicate with each other through a second connecting pipe. In this embodiment, the first water distribution pipe 11 and the second water distribution pipe 21 only show 2 layers in the height direction, and only 3 circles in the diameter direction, but in practical applications, for the large-diameter spherical tank body, 2 layers can be set in the height direction 3 or more layers can be set in the diameter direction.

Further, referring to Fig. 3, both the first water distribution pipe 11 and the second water distribution pipe 21 are annular pipes, and the first water distribution pipe 11 and the second water distribution pipe 21 are respectively provided with several rows of spraying structures. In the embodiment, two rows of injection structures are installed on each water distribution pipe, and the flow rate or flow rate can meet the heat storage and heat release requirements of the system.

Further, referring to Fig. 4, the spraying structure on the first water distribution pipe 11 is arranged inclined upwards, and the spraying structure of the second water distribution pipe 21 is arranged inclined downwards, and the spraying structure forms a certain angle b with the horizontal plane. In this embodiment, the value range of the angle b is 10-60 degrees, which can ensure that the water flow rate under the same plane of the spherical tank is basically uniform. Through the water flow simulation, it is ensured that the water flow can flow evenly in the height direction of the spherical tank body, and the thermocline layer in the tank body can be ensured as small as possible, and the water volume in the thermocline layer is controlled within 3% of the total water volume.

Further, the first water distribution pipe 11 and the second water distribution pipe 21 are respectively provided with two rows of spraying structures, and the two rows of spraying structures form a certain angle a. Since the diameter of the spherical tank in the height direction changes, the water flow rate in the height direction also changes when the flow rate is constant. In this embodiment, the value range of the angle a is 60-120 degrees, which can ensure that the spherical tank is on the same plane The water flow rate is basically uniform.

Further, the injection structure is an injection hole or a nozzle.

Working process of the present invention:

During the heat storage process, high-temperature water enters the spherical tank body 10 from the top of the spherical tank body 10 through the upper water distributor 1, and gradually discharges low-temperature water from the bottom of the spherical tank body 10 through the lower water distributor 2 until it reaches the inside of the spherical tank body 10. It is all high temperature water, and the heat storage is completed. The water distributor can make the high-temperature water flow down evenly from the upper part of the spherical tank body to avoid turbulent flow, and the low-temperature water can also flow out evenly, so as to effectively reduce the temperature slope.

During the exothermic process, low-temperature water enters the spherical tank body 10 from the bottom of the spherical tank body 10 through the lower water distributor 2, and gradually discharges high-temperature water from the top of the spherical tank body 10 through the upper water distributor 1 until the spherical tank body All the high temperature water is output within 10, and all the water in the tank is replaced with low temperature water, so that the heat release is over. The water distributor can make the low-temperature water flow upward evenly from the bottom of the spherical tank body, avoiding the formation of turbulent flow, and the high-temperature water flows out evenly from the top of the tank body, ensuring the effective reduction of the temperature slope.

The above-mentioned embodiment is an illustration of the present invention, not a limitation of the present invention, and any solution after a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims (8)

1. A thermal storage type spherical tank water distributor, characterized in that: it comprises a spherical tank body (10), and an upper water distributor (1) and an inner water distributor respectively arranged on the upper part of the inner cavity of the spherical tank body (10). The lower water distributor (2) at the lower part of the cavity, the upper water distributor (1) includes several first water distribution pipes (11), and the first water inlet and outlet pipes (12) connected with each first water distribution pipe (11) ), the lower water distribution device (2) includes several second water distribution pipes (21), and the second water inlet and outlet pipes (22) communicated with each second water distribution pipe (21), each first water distribution pipe (11 ), the second water distribution pipe (21) are equipped with several injection structures. 2. A thermal storage spherical tank water distributor according to claim 1, characterized in that: the upper water distributor (1) comprises several layers of first water distribution pipe layers arranged at intervals along the height direction, the The first water distribution pipe layer includes several first water distribution pipes (11) arranged sequentially from the inside to the outside, and two adjacent first water distribution pipes (11) are connected through a first connecting pipe. 3. A thermal storage type spherical tank water distributor according to claim 1, characterized in that: the lower water distributor (2) includes several layers of second water distribution pipe layers arranged at intervals along the height direction, the The second water distribution pipe layer includes a plurality of second water distribution pipes (21) arranged sequentially from inside to outside, and two adjacent second water distribution pipes (21) are connected through second connecting pipes. 4. A thermal storage type spherical tank water distributor according to any one of claims 1 to 3, characterized in that: the first water distribution pipe (11) and the second water distribution pipe (21) are both ring-shaped Circle tube. 5. The thermal storage spherical tank water distributor according to claim 1, characterized in that: the first water distribution pipe (11) and the second water distribution pipe (21) are respectively provided with several rows of spraying structures. 6. A thermal storage type spherical tank water distributor according to claim 5, characterized in that: the spraying structure on the first water distribution pipe (11) is inclined upwards, and the second water distribution pipe (21) The spraying structure is arranged obliquely downward, and the spraying structure forms a certain angle b with the horizontal plane. 7. A thermal storage spherical tank water distributor as claimed in claim 5 or 6, characterized in that: the first water distribution pipe (11) and the second water distribution pipe (21) are respectively provided with two rows of spray structure, and a certain angle a is formed between the two rows of spray structures. 8. A thermal storage type spherical tank water distributor as claimed in claim 1, 5 or 6, characterized in that: the injection structure is an injection hole or a nozzle.