Saline water ice-making system utilizing LNG (Liquefied Natural Gas) cold energy

Abstract

The utility model relates to the technical field of salt water ice making, in particular to a salt water ice making system utilizing LNG (Liquefied Natural Gas) cold energy, which comprises a first cold exchanger, a water distributor arranged below the first cold exchanger, a first ice mold arranged above the first cold exchanger, a first-stage ice making pool arranged outside the first cold exchanger, and a second-stage ice making pool arranged outside the second cold exchanger. One side of the first-stage ice making pool is connected with a second-stage ice making pool in series, a second cold exchanger is arranged in the second-stage ice making pool, and a second ice mold is arranged above the second cold exchanger. According to the ice making system, a large amount of low-temperature cold energy is recycled, the cold energy is recycled for making ice, and considerable economic value and social benefit are achieved; and compared with a traditional deicing mode of ice making, heat energy of air is fully utilized, and energy consumption needed by a heat source during deicing is reduced.

Description

Technical Field

[0001] This utility model relates to the field of brine ice-making technology, and in particular to a brine ice-making system utilizing LNG cold energy. Background Technology

[0002] Ice blocks, as an important cooling medium, are widely used in food preservation, medical refrigeration, and scientific research. They primarily work by cooling water to below its freezing point using refrigeration equipment, causing it to freeze into a solid. Currently, the mainstream ice-making methods are brine ice making and fluorinated ice making. During de-icing, the compressor unit runs continuously, resulting in a waste of electrical and cooling energy. If the power is interrupted during de-icing, the continuity of ice making cannot be guaranteed. Furthermore, the agitators in traditional ice-making tanks are more prone to aging and damage, causing turbulence and other factors, resulting in poor cooling efficiency and high energy consumption in ice making.

[0003] In recent years, many cities have successively built LNG receiving terminals and gasification stations as gas sources to supply natural gas to users. LNG is usually stored in storage tanks in a cryogenic liquid state of around -162°C. Before being supplied to users, LNG needs to be reheated and gasified. In this process, a large amount of cryogenic cold energy is released and cannot be recovered, which requires improvement. Utility Model Content

[0004] The purpose of this utility model is to solve the technical problems mentioned in the background art.

[0005] The present invention adopts the following technical solution: a brine ice-making system utilizing LNG cold energy, comprising a first cooler, a water distributor arranged below the first cooler, an ice mold arranged above the first cooler, a primary ice-making pool arranged outside the first cooler, a secondary ice-making pool connected in series on one side of the primary ice-making pool, a second cooler arranged inside the secondary ice-making pool, and an ice mold arranged above the second cooler.

[0006] Preferably, it also includes a de-icing pool, one side of which is connected to an air source water heater, and another side of which is connected to an air heating tower.

[0007] Preferably, an ambient temperature vaporizer is installed on one side of the secondary ice-making tank.

[0008] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0009] This invention enables the recovery of a large amount of low-temperature cold energy and its reuse in ice making, which has considerable economic value and social benefits. Compared with the traditional ice-making and melting methods, it makes full use of the heat energy of the air and reduces the energy consumption required for heat source during ice removal. Attached Figure Description

[0010] Figure 1 This invention presents a schematic diagram of a brine ice-making system utilizing LNG cold energy.

[0011] Figure 2 This invention provides an isometric view of the ice-making tank layout of a brine ice-making system utilizing LNG cold energy.

[0012] Legend:

[0013] 1. Cooler 1; 2. Water distributor; 3. Ice mold 1; 4. Primary ice-making tank; 5. Cooler 2; 6. Ice mold 2; 7. Secondary ice-making tank; 8. De-icing tank; 9. Air source heat pump water heater; 10. Air heating tower; 11. Air-temperature vaporizer. Detailed Implementation

[0014] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0015] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0016] Example

[0017] Please see Figure 1-2 This utility model provides a technical solution: a brine ice-making system utilizing LNG cold energy, including a cooler 1, a water distributor 2 arranged below the cooler 1, and an ice mold 3 arranged above the cooler 1. The ice mold 3, cooler 1, and water distributor 2 are arranged sequentially from top to bottom, reducing the footprint of traditional ice-making pools, improving the fluidity of brine, and enhancing the cooling effect. A primary ice-making pool 4 is set outside the cooler 1, and a secondary ice-making pool 7 is connected in series on one side of the primary ice-making pool 4. The cold energy released by LNG vaporization can be better extracted by brine through a heat exchanger, improving the utilization rate of LNG cold energy. The temperature difference between the primary ice-making pool 4 and the secondary ice-making pool 7 can achieve the effect of staggered ice making and staggered de-icing, ensuring the continuity of LNG vaporization and ice making. The secondary ice-making pool 7 is equipped with a second cooler 5, and an ice mold 6 is arranged above the second cooler 5. When the downstream natural gas demand fluctuates, multiple sets of primary and secondary ice-making pools can be connected in parallel. By adjusting the number of ice-making pools and the ice-making speed, the natural gas peak shaving effect can be achieved.

[0018] It also includes a de-icing pool 8, one side of which is connected to an air source water heater 9, and another side of which is connected to an air heating tower 10. An air-temperature vaporizer 11 is installed on one side of the secondary ice-making pool 7. The heat source for the ice pool comes from the air source water heater 9 and the air heating tower 10. When the temperature is high, the air source water heater 9 does not start, and the air heating tower 10 extracts heat energy from the air to heat the water in the de-icing pool. When the temperature is low, the air source water heater 9 starts as a supplementary heat source, and together with the air heating tower 10, it heats the de-icing pool. Compared with the traditional ice-making and de-icing methods, it makes full use of the heat energy of the air and reduces the energy consumption required for the heat source during de-icing.

[0019] Working principle: In the ice-making process, LNG enters the cooler 1 from the storage tank through the pipeline under pressure. Cooler 1 transfers the cold energy to the brine in the first-stage ice-making pool 4. After the LNG is initially vaporized, it enters the cooler 5. After secondary heat exchange, cooler 5 transfers the extracted cold energy to the brine in the second-stage ice-making pool 7. The heated and vaporized natural gas enters the ambient temperature vaporizer 11 and is heated to room temperature before being transported to the pipeline of the downstream user. During the LNG cooling process, the water distributor 2 operates, distributing water upwards to flush the coils of cooler 1 and cooler 2 5, enhancing the fluidity of the brine and improving the cooling effect. The low-temperature brine passes through the iron ice molds 3 and 6, transferring the cold energy to the ice-making water in ice molds 3 and 6 until the ice-making water slowly solidifies into ice blocks, completing the ice-making process.

[0020] During the de-icing process, the support frame holding the ice mold is lifted and placed into the de-icing pool 8. When the temperature is high, only the air heating tower 10 operates, and the water in the de-icing pool 8 is heated by the air heating tower 10. When the temperature is low, the air heating tower 10 operates, and the air source water heater 9 acts as an auxiliary heat source to heat the de-icing pool 8. After the ice mold enters the de-icing pool 8, the ice layer on the ice mold wall melts quickly due to the high water temperature in the de-icing pool 8. Then, the entire row of ice is poured out of the ice mold, and the ice mold is refilled with water and placed into the ice-making pool for the next round of ice making. Since the temperature of the first-stage ice-making pool 4 is lower than that of the second-stage de-icing pool 7, the ice-making speed of the first-stage ice-making pool 4 is faster than that of the second-stage ice-making pool 7, which can create a time difference between ice making and de-icing. Ice making and de-icing can be carried out simultaneously, ensuring that the ice-making system operates without interruption.

[0021] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A salt water ice making system utilizing LNG cold energy, comprising a cold exchanger (1), characterized in that: The lower part of the cooler one (1) is arranged with a water distributor (2), the upper part of the cooler one (1) is arranged with an ice mold one (3), the outer part of the cooler one (1) is provided with a first-stage ice making pool (4), one side of the first-stage ice making pool (4) is provided in series with a second-stage ice making pool (7), the inside of the second-stage ice making pool (7) is arranged with a cooler two (5), the upper part of the cooler two (5) is arranged with an ice mold two (6).

2. The saltwater ice making system using LNG cold energy according to claim 1, characterized in that: Further comprising a deicing pool (8), one side of the deicing pool (8) is communicated with an air energy water heater (9), one side of the deicing pool (8) is also communicated with an air temperature rising tower (10).

3. The saltwater ice making system utilizing LNG cold energy according to claim 1, characterized in that: One side of the second-stage ice making pool (7) is mounted with an air temperature type gasifier (11).

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