CN210861913U - Open type air refrigeration low-temperature refrigeration house for recovering liquefied natural gas cold energy - Google Patents

Abstract

The utility model discloses an open-type air-refrigerated low-temperature cold storage for recovering the cold energy of liquefied natural gas. The lower part of the cold storage is connected by a return air pipe; there is a heat exchanger at the bottom of the cold air treatment box, the heat exchanger is connected with the outlet of the LNG circulation through the LNG pump, and a fan is installed above the heat exchanger, located below the air inlet of the air supply duct. The utility model fully recycles and utilizes the cold energy of liquefied natural gas, the open air provides cooling for the cold room, no heat exchanger is required in the cold room, no frosting, the system equipment is simple, the initial investment and energy consumption are low, and the cooling energy of the liquefied natural gas is improved. Utilization rate, energy saving and environmental protection.

Description

Open air-cooled low-temperature cold storage for recovering LNG cold energy

technical field

The utility model relates to the technical field of food freezing and refrigeration, in particular to an open-type air-refrigerated low-temperature cold storage for recovering the cold energy of liquefied natural gas.

Background technique

The usual food freezing and refrigerating low-temperature cold storage is a Freon or ammonia two-stage compression refrigeration system, and a cascade refrigeration system is also used. The refrigeration compressor needs to consume a lot of electricity, and the coils in the cold room of the cold storage or the surface of the air cooler is frosted , resulting in an increase in heat transfer resistance, a decrease in heat transfer performance, a decrease in evaporating temperature, and a further increase in the power consumption of the refrigeration compressor. At the same time, the refrigeration system is complex and the initial investment is high. If the liquefied natural gas cold energy is recovered by using the refrigerant, similarly, the surface of the coil or the air cooler in the cold room of the cold storage will be frosted, which will affect the heat transfer effect. Moreover, the defrosting will affect the temperature field in the cold room and affect the preservation of food. Quality, the cleaning of defrost water is also more troublesome.

Utility model content

The purpose of this utility model is to aim at the technical defects existing in the prior art, to provide an open air-refrigerated low-temperature cold storage that recovers the cold energy of liquefied natural gas, so as to solve the effective utilization of the cold energy of liquefied natural gas and realize the open air of the low-temperature cold storage. Refrigeration, save energy.

The technical scheme adopted by the utility model to solve its technical problems is:

An open air-cooled low-temperature cold storage for recovering liquefied natural gas cold energy, comprising a cold air treatment box located on one side of the cold storage, the cold air treatment box is connected with the upper part of the cold storage through an air supply pipe, and is connected with the lower part of the cold storage through The return air pipe is connected; there is a heat exchanger at the bottom of the cold air treatment box, the heat exchanger is connected to the outlet of the LNG circulation through the LNG pump, and a fan is installed above the heat exchanger, which is located in the Below the air inlet of the duct.

Wherein, the air supply pipe includes a vertical air supply pipe and a horizontal air supply pipe, one end of the vertical air supply pipe is deep into the top of the cold air treatment box, and the other end is connected with the horizontal air supply pipe. The horizontal air supply pipe horizontally passes through the wall orifice of the storage body, extends into the storage body and is located at the top of the storage body of the cold storage.

Wherein, the horizontal air supply pipe water is fixedly connected to the top of the storage body through the air pipe hanger.

The two ends of the air return pipe are open, one end is horizontally located at the bottom of the cold storage body, passes through the wall orifice of the cold storage body and is fixed on the wall body, and the other end side is deep into the bottom of the cold air treatment box.

Wherein, the outlet pipe of the heat exchanger protrudes out of the cold air treatment box through the side wall of the cold air treatment box, and is connected to the inlet of the liquefied natural gas circulation.

Wherein, there are a plurality of the air supply pipes and the air return pipes, respectively, and they are spaced apart from each other.

Wherein, a plurality of air outlets arranged at intervals are formed on the pipe wall of the horizontal air supply pipe.

The open-type air-refrigerated low-temperature cold storage of the utility model for recovering the cold energy of liquefied natural gas fully recovers and utilizes the cold energy of liquefied natural gas, and the open air is used for cooling the cold room. Simple, low initial investment and energy consumption, improve the utilization rate of liquefied natural gas cold energy, energy saving and environmental protection.

Description of drawings

Fig. 1 is the schematic diagram of the low-temperature cold storage of the open air refrigeration that reclaims liquefied natural gas cold energy of the present invention;

FIG. 2 is a schematic diagram of the direction A-A in FIG. 1 .

Detailed ways

The present utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in FIGS. 1 and 2 , the open air-refrigerated low-temperature cold storage for recovering the cold energy of liquefied natural gas of the present invention includes a vertical air supply duct 1, a horizontal air supply duct 2, an air duct hanger 3, an air outlet 4, a storehouse Door 5 , storage body 6 , return air pipe 7 , LNG pump 8 , heat exchanger 9 , fan 10 , bracket 11 , cold air treatment box 12 .

One end of the vertical air supply pipe 1 goes deep into the top of the cold air treatment box 12, and the other end is connected to the horizontal air supply pipe 2, which is horizontally located on the top of the storage body and passes through the wall hole of the storage body. The port is fixedly connected to the top of the storage body through the air duct hanger 3.

In the present invention, both ends of the air return pipe 7 are open, one end is horizontally located at the bottom of the storage body, passes through the wall orifice of the storage body and is fixed on the wall body, and the other end side goes deep into the cold air treatment box 12 inside the bottom.

In the present invention, the heat exchanger 9 is located at the bottom of the cold air treatment box 12 and the upper part of the return air pipe 7. The inlet pipe passes through the side wall of the cold air treatment box 12, and passes through the LNG pump 8 and the outlet of the LNG circulation. The outlet pipe is connected through the side wall of the cold air treatment box 12 and is connected with the inlet of the liquefied natural gas circulation.

In the present invention, the fan 10 is located at the upper part of the heat exchanger 9 in the cold air treatment box 12 , and is specifically fixed to the inner wall of the cold air treatment box 12 through the fan bracket 11 .

In the present invention, the storage body 6 may be a heat-insulating hexahedral structure composed of a top plate, a wall plate, a top plate and a bottom plate, and a door frame is provided close to the storage door 5 in sealing cooperation with the storage door 5. A vertical side of the storage door 5 is connected to the storage door 5. The corresponding vertical sides of the door frame are fixed and relatively rotatable.

In the present invention, the cold air treatment box 12 can be a sealed hexahedron structure composed of heat preservation boards.

When the refrigeration system is running, the LNG pump 8 and the fan 10 are started, and the air is at the bottom of the cold air treatment box 12. Under the suction action of the fan 10, the air blows through the heat exchanger 9 and exchanges heat with the low-temperature LNG, and enters after the temperature decreases. The vertical air supply pipe 1 and the horizontal air supply pipe 2 are blown into the cold room through the air supply port 4 formed on the pipe wall of the horizontal air supply pipe 2, and are returned to the cold air treatment box from the return air port at the bottom through the return air pipe 7 12, cycle back and forth.

The utility model develops an open air-refrigerated low-temperature cold storage for recovering liquefied natural gas cold energy, no heat exchanger is required in the cold room, no frosting, simple system equipment, low initial investment and low energy consumption, and the utilization of liquefied natural gas cold energy is improved. efficiency, energy saving and environmental protection.

The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, some improvements and modifications can be made without departing from the principles of the present invention. Improvement and modification should also be regarded as the protection scope of the present invention.

Claims (7)

1. The open type air refrigeration low-temperature refrigeration house for recovering the cold energy of the liquefied natural gas is characterized by comprising a cold air treatment box positioned on one side of the refrigeration house, wherein the cold air treatment box is connected with the upper part of the refrigeration house through an air supply pipe and is connected with the lower part of the refrigeration house through an air return pipe; the cold air treatment box is characterized in that a heat exchanger is arranged at the bottom of the cold air treatment box, the heat exchanger is connected with an outlet of liquefied natural gas circulation through a liquefied natural gas pump, and a fan is arranged above the heat exchanger and located below an air inlet of the air supply pipe.

2. The open type air-cooled cryogenic refrigerator for recovering cold energy of liquefied natural gas according to claim 1, wherein the air supply pipe comprises a vertical air supply pipe and a horizontal air supply pipe, one end of the vertical air supply pipe extends into the top of the cold air treatment box, the other end of the vertical air supply pipe is connected with the horizontal air supply pipe, and the horizontal air supply pipe horizontally penetrates through a wall orifice of the refrigerator body, extends into the refrigerator body and is positioned at the top of the refrigerator body of the cryogenic refrigerator.

3. The open type air refrigeration low-temperature freezer for recovering the cold energy of the liquefied natural gas as claimed in claim 2, wherein the horizontal air supply pipe is fixedly connected with the top of the freezer body through an air pipe hanger.

4. The open type air refrigeration low-temperature cold storage warehouse for recovering the cold energy of the liquefied natural gas according to claim 1, wherein two ends of the air return pipe are open, one end of the air return pipe is horizontally positioned at the bottom of the cold storage warehouse body, penetrates through a wall orifice of the cold storage warehouse body and is fixed on the wall, and the other end of the air return pipe extends into the bottom of the cold air treatment box from the side surface.

5. The open air-cooled cryogenic refrigerator for recovering cold energy from liquefied natural gas according to claim 1, wherein the outlet connection pipe of the heat exchanger extends out of the cold air treatment tank through the side wall of the cold air treatment tank and is connected with the inlet of the liquefied natural gas circulation.

6. The open type air-cooled cryogenic refrigerator for recovering cold energy of liquefied natural gas according to claim 1, wherein the plurality of the blast pipes and the plurality of the return pipes are provided at a distance from each other.

7. The open type air refrigeration cryogenic refrigerator for recovering liquefied natural gas cold energy according to claim 2, wherein a plurality of air outlets arranged at intervals are formed on the pipe wall of the horizontal air supply pipe.

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