A cold storage device for industrial multi-grade cold demand

Abstract

The application discloses a kind of industrial multi-grade cold demand-oriented cold storage device, to solve the deficiency of the prior art in cold storage device equipment, large floor area and high investment cost.It solves the above technical problems by the following technical solutions: including: ice slurry pool, cold water cavity and air cavity are sequentially arranged from inside to outside;Ice slurry pool is provided with a first heat exchange component, cold water cavity is provided with a second heat exchange component, and air cavity is provided with a third heat exchange component;The first heat exchange component and the second heat exchange component are communicated, and the second heat exchange component and the third heat exchange component are communicated.Through sequentially setting a first heat exchange component, a second heat exchange component and a third heat exchange component in the ice slurry pool, the cold water cavity and the air cavity, three-stage heat exchange is realized in the working process, so that three grades of cold can be stored simultaneously, and different grades of heat can be used according to industrial production and life.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cold storage, more particularly, it relates to a cold storage device for industrial multi-grade cold demand. BACKGROUND

[0002] Cold storage technology is one of the energy-saving and environment-friendly technologies widely used in modern industrial production. Cold storage technology is to store the cold energy in off-peak period using a coolant, and to use the stored cold energy in peak period, thereby reducing energy consumption and environmental pollution. However, the traditional cold storage device can only realize single-grade cooling, and multiple cold storage devices need to be set up separately during use, which has the problems of too many devices, large floor area and high investment cost, and cannot well meet the industrial multi-grade cold demand. SUMMARY

[0003] The present application overcomes the deficiencies of too many devices, large floor area and high investment cost in the prior art, and provides a cold storage device for industrial multi-grade cold demand, which can store cold energy in stages, improve the efficiency of cold energy storage, and select appropriate cold energy temperature according to actual needs during use, so as to adapt to different use scenarios, has the characteristics of simple structure and good cold energy storage effect.

[0004] In order to solve the above technical problems, the present application adopts the following technical scheme: a cold storage device for industrial multi-grade cold demand, comprising: an ice slurry pool, a cold water cavity and an air cavity arranged in sequence from inside to outside; a first-stage heat exchange assembly is arranged in the ice slurry pool, a second-stage heat exchange assembly is arranged in the cold water cavity, and a third-stage heat exchange assembly is arranged in the air cavity; the first-stage heat exchange assembly and the second-stage heat exchange assembly are in communication, and the second-stage heat exchange assembly and the third-stage heat exchange assembly are in communication.

[0005] In the present application, the first-stage heat exchange assembly, the second-stage heat exchange assembly and the third-stage heat exchange assembly are arranged in sequence in the ice slurry pool, the cold water cavity and the air cavity; so that during work, three-stage heat exchange is realized, so that three grades of cold energy can be stored at the same time, so that different grades of heat can be used in industrial production and life; in addition, the ice slurry pool, the cold water cavity and the air cavity are arranged in sequence from inside to outside in the present application, so that the installation space of the whole device can be saved as much as possible, so that the overall structure is more compact, in addition, the space of the outer layer can play a heat preservation and insulation role for the inner layer, so that the overall heat preservation and insulation effect is better.

[0006] As a preferred, the first-stage heat exchange assembly comprises a first-stage heat exchange pipe arranged at the bottom of the ice slurry pool, a first-stage heat exchange manifold arranged at the top of the ice slurry pool, and a plurality of first-stage heat exchange pipes connecting the first-stage heat exchange pipe and the first-stage heat exchange pipe.

[0007] By setting the first heat exchange pipe, the first heat exchange manifold and the first heat exchange pipe, the heat exchange effect can be better.

[0008] As preferred, the first heat exchange pipe is in C shape, the first heat exchange pipe and the first heat exchange manifold are arranged in parallel, and the first heat exchange pipe is arranged on both sides of the first heat exchange pipe along the length direction of the first heat exchange pipe.

[0009] The first heat exchange pipe is arranged staggered, so that the heat exchange in the ice slurry pool can be uniform, and the heat exchange efficiency is higher.

[0010] As preferred, the second heat exchange assembly comprises a second heat exchange pipe arranged above the ice slurry pool and the cold water cavity, a second heat exchange manifold arranged at the bottom of the ice slurry pool, and a second heat exchange pipe arranged in the cold water cavity and communicated with the second heat exchange pipe and the second heat exchange manifold; the second heat exchange pipe is communicated with the first heat exchange assembly through the first connecting pipe.

[0011] By setting the second heat exchange pipe, the heat exchange effect in the cold water cavity can be better.

[0012] As preferred, the third heat exchange assembly comprises a third heat exchange pipe arranged in the air cavity and arranged along the axial direction of the air cavity, and the third heat exchange pipe is communicated with the second heat exchange manifold.

[0013] By setting the third heat exchange pipe, the heat exchange in the air pool can be realized.

[0014] As preferred, the ice slurry pool, the cold water cavity and the air cavity are all in cylindrical shape, and the ice slurry pool, the cold water cavity and the air cavity are arranged concentrically.

[0015] The cylindrical ice slurry pool, the cold water cavity and the air cavity can make the stored heat more uniform, and at the same time, under the same floor area, the floor area of the cylindrical ice slurry pool, the cold water cavity and the air cavity is smaller, so that the overall structure is more compact; in addition, the second heat exchange assembly and the third heat exchange assembly are arranged to radiate outward from the center of the ice slurry pool, so that the heat exchange in the ice slurry pool, the cold water cavity and the air cavity can be realized step by step, and the overall heat exchange effect is better, and the heat exchange efficiency is improved.

[0016] As preferred, an ice slurry stirring device is arranged in the ice slurry pool, the ice slurry stirring device comprises a rotating shaft, a plurality of blades arranged on the rotating shaft, and an electric device for driving the rotating shaft to rotate; the two ends of the rotating shaft are rotatably arranged on the ice slurry pool top plate and the ice slurry pool bottom plate.

[0017] The blades rotate when the LNG exchanges heat in the ice slurry pool and the ice slurry, which can keep the ice slurry flowing to prevent the phenomenon of agglomeration weakening heat transfer, and can strengthen convection, strengthen heat transfer and improve the cold storage efficiency of the ice slurry pool.

[0018] As preferred, the rotating shaft is eccentrically arranged in the ice slurry pool.

[0019] The rotating shaft is eccentrically arranged in the ice slurry tank, so that when the ice slurry in the ice slurry tank is stirred, the ice slurry flows non-uniformly around the rotating shaft, so that the ice slurry can be mixed more uniformly under the action of the rotating shaft.

[0020] Preferably, the ice slurry tank and the cold water cavity are arranged in the heat preservation cavity; the ice slurry tank, the cold water cavity and the air cavity have equal height side walls, and the side walls are covered with waterproof and heat insulation materials.

[0021] Preferably, the outer side walls of the primary heat exchange pipe, the secondary heat exchange pipe and the tertiary heat exchange pipe are uniformly provided with fins, and the fins are arranged along the length direction of the pipe body.

[0022] The outer side walls of the primary heat exchange pipe, the secondary heat exchange pipe and the tertiary heat exchange pipe are uniformly provided with fins, so that the heat exchange area can be increased, the heat transfer can be strengthened, and the cold storage efficiency can be improved.

[0023] Compared with the prior art, the application has the following advantages:

[0024] (1) The cold energy contained in the low-temperature liquid fuel is used for refrigeration, and the needs of low-temperature liquid fuel gasification and multi-grade cold storage in industrial scenarios are simultaneously realized;

[0025] (2) The integrated multi-grade cold storage and energy cascade utilization of the ice slurry tank, the cold water cavity and the air cavity are realized, and the multi-grade cold demand in the fields of process cold and building cold in industrial scenarios is met;

[0026] (3) The ice slurry tank is provided with blades connected with an external electric device through a rotating shaft, so that the convective heat transfer is strengthened, the ice slurry tank wall is prevented from icing, and the cold storage efficiency of the cold storage device is improved;

[0027] (4) The electric device is a variable frequency motor, which can adjust the rotating speed of the rotating shaft, so that the flexibility of the response time of the integrated cold storage device is realized;

[0028] (5) The air cavity meets the needs of cold air in industrial and building fields, and also has the heat insulation function of the integrated cold storage device;

[0029] (6) The LNG can be replaced by a conventional refrigerant or other industrial low-temperature liquid fuel under different industrial conditions, and can be applied to different industrial field production environments, so that the applicability is wide;

[0030] (7) The outer side walls of the primary heat exchange pipe, the secondary heat exchange pipe and the tertiary heat exchange pipe are uniformly provided with fins, so that the heat exchange area can be increased, the heat transfer can be strengthened, and the cold storage efficiency can be improved;

[0031] (8) The outer periphery of the rotary sealing device is welded with the ice slurry tank top plate and the ice slurry tank bottom plate to form an integral whole, and a mechanical seal is used to seal the rotary shaft, thereby ensuring the safety and stability during the operation of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 is the front view of the present application;

[0033] Figure 2 is the structure diagram of the primary heat exchange assembly and the top view of the ice slurry tank of the present application;

[0034] Figure 3 is the structure diagram of the ice slurry stirring device of the present application;

[0035] Figure 4 is the top view of the ice slurry stirring device in the ice slurry tank of the present application;

[0036] Figure 5 is the top view of the secondary heat exchange assembly of the present application;

[0037] Figure 6 is the structure diagram of the heat exchange pipe of the present application;

[0038] In the figure: 1, ice slurry tank; 2, cold water cavity; 3, air cavity; 4, LNG inlet; 5a, primary heat exchange pipe; 5b, primary heat exchange pipe; 5c, primary heat exchange pipe; 5d, primary connecting pipe; 6a, secondary heat exchange pipe; 6b, secondary heat exchange pipe; 6c, secondary heat exchange pipe; 7, tertiary heat exchange pipe; 8, heat preservation cavity; 9, base; 10, rotary shaft; 11, ice slurry tank top plate; 12, ice slurry tank bottom plate; 13, rotary sealing device; 14, blade; 15, electric device; 16, fin. DETAILED DESCRIPTION

[0039] The technical solutions of the present application will be further described in detail below by specific examples and in combination with the drawings:

[0040] Example 1: Referring to Figures 1 to 6 the drawing, a cold storage device for industrial multi-grade cold demand includes: an ice slurry tank 1, a cold water cavity 2 and an air cavity 3 arranged from inside to outside, the ice slurry tank, the cold water cavity and the air cavity are all cylindrical, and the ice slurry tank, the cold water cavity and the air cavity are concentrically arranged; a primary heat exchange assembly is arranged in the ice slurry tank, a secondary heat exchange assembly is arranged in the cold water cavity, and a tertiary heat exchange assembly is arranged in the air cavity; the primary heat exchange assembly and the secondary heat exchange assembly are in communication, and the secondary heat exchange assembly and the tertiary heat exchange assembly are in communication. A base 9 is arranged at the bottom of the air cavity and the ice slurry tank, and the base is used to support the overall cold storage device for industrial multi-grade cold demand, facilitating pipeline arrangement at the bottom.

[0041] The first heat exchange assembly comprises a first heat exchange pipe 5a arranged at the bottom of the ice slurry pool, a first heat exchange manifold 5c arranged at the top of the ice slurry pool, and a plurality of first heat exchange pipes 5b connecting the first heat exchange pipe and the first heat exchange manifold. The first heat exchange pipe is in the shape of "C", the first heat exchange pipe and the first heat exchange manifold are arranged in parallel, and the first heat exchange pipe is arranged on both sides of the plane space formed by the first heat exchange pipe and the first heat exchange manifold along the length direction of the first heat exchange pipe. The bottom of the first heat exchange pipe is connected with an LNG inlet 4, and LNG as a refrigerant can enter the first heat exchange pipe from the LNG inlet.

[0042] The second heat exchange assembly comprises a second heat exchange pipe 6a arranged above the ice slurry pool and the cold water cavity, a second heat exchange manifold 6c arranged at the bottom of the ice slurry pool, and a plurality of second heat exchange pipes 6b arranged in the cold water cavity and connected with the second heat exchange pipe and the second heat exchange manifold. The second heat exchange pipe is connected with the first heat exchange manifold through a first connecting pipe 5d, and the first heat exchange manifold coincides with the central axis of the ice slurry pool.

[0043] The third heat exchange assembly comprises a third heat exchange pipe 7 arranged in the air cavity and arranged along the axial direction of the air cavity. The third heat exchange pipe is connected with the second heat exchange manifold.

[0044] The second heat exchange assembly and the third heat exchange assembly are uniformly distributed outwardly with the first connecting pipe as the center.

[0045] In order to improve the heat preservation effect and prevent the loss of cold energy, the ice slurry pool and the cold water cavity are arranged in the heat preservation cavity 8. The side walls of the ice slurry pool, the cold water cavity and the air cavity are of the same height, and the waterproof and heat insulation materials are arranged on the side walls.

[0046] In order to improve the heat dissipation effect, the outer side walls of the first heat exchange pipe, the second heat exchange pipe and the third heat exchange pipe are uniformly distributed with fins 16, and the fins are arranged along the length direction of the pipe body.

[0047] In order to reduce the overall mass, the first heat exchange pipe, the first heat exchange pipe, the first heat exchange manifold, the first heat exchange and the second heat exchange connecting pipe, the second heat exchange pipe, the second heat exchange pipe, the second heat exchange manifold, the third heat exchange pipe and the fin are all made of aluminum alloy.

[0048] In addition, in order to improve the heat exchange effect in the ice slurry pool and prevent the ice slurry pool heat exchange wall from icing, the ice slurry stirring device is arranged in the ice slurry pool to improve the cold storage efficiency of the cold storage device.

[0049] The ice slurry stirring device comprises a rotating shaft 10, a plurality of blades 14 welded on the rotating shaft, and an electric device 15 for driving the rotating shaft to rotate; an upper mounting hole is arranged on the ice slurry pool top plate 11, the upper end of the rotating shaft is rotatably arranged in the mounting hole, and a rotary sealing device 13 is arranged in the mounting hole; a lower mounting hole is arranged on the ice slurry pool bottom plate 12, the lower section of the rotating shaft passes through the lower mounting hole and is connected with the output end of the electric device, and rotary sealing devices are also arranged between the lower mounting hole and the side wall of the rotating shaft, and the rotary sealing device in the embodiment is a mechanical sealing structure. The electric device is a variable frequency motor, which can adjust the rotating speed of the rotating shaft, so that the flexibility of the response time of the integrated cold storage device is realized.

[0050] In addition, the rotating shaft is eccentrically arranged in the ice slurry pool, and specifically, the position of the rotating shaft is slightly deviated from the position of the center of the cross section of the ice slurry pool.

[0051] The working principle of the application is as follows: as shown in Figure 1 , the cold storage device is placed on a foundation, the foundation is located on both sides of the device to ensure the stability of the device during operation and make the bottom part of the device suspended, thereby facilitating the arrangement of the LNG input pipeline and the line of the electric device. When the device starts to operate, LNG as a refrigerant enters the primary heat exchange pipe from the LNG inlet and flows into the primary heat exchange pipe, and exchanges heat with the ice slurry in the ice slurry pool. After the primary heat exchange, the LNG flows into the primary heat exchange and secondary heat exchange connecting pipe, flows into the secondary heat exchange pipe through the secondary heat exchange pipe, exchanges heat with the cold water in the cold water cavity, and at this time, the LNG completes partial gasification. After the secondary heat exchange, the gas-liquid two-phase LNG flows into the tertiary heat exchange pipe after being combined in the secondary heat exchange pipe, exchanges heat with the cold air in the air cavity, at this time, the LNG completes gasification and enters the industrial production link from the outlet of the tertiary heat exchange pipe. The three-stage heat exchange can simultaneously produce three kinds of cold energy and store them, and different grades of cold energy can be used according to different needs of industrial production and life.

[0052] As shown in Figure 2 , Figure 3 , Figure 4 , the fan blades rotate when the LNG exchanges heat in the ice slurry pool and the ice slurry, one is to keep the ice slurry flowing to prevent the phenomenon of clumping and weaken the heat transfer, and the other is to strengthen the convection and heat transfer and improve the cold storage efficiency of the ice slurry pool. The ice slurry pool top plate can be disassembled, which facilitates the adjustment of the solution ratio in the ice slurry pool, the melting point of the ice slurry can be changed as needed, and the demand for more grades of cold energy can be met. The rotary sealing device adopts mechanical sealing to seal the rotating shaft, which ensures the safety and stability of the equipment during operation.

[0053] As shown in Figure 2 , Figure 5 , Figure 6As shown, the heat exchange pipes, heat exchange manifold and heat exchange pipe are uniformly arranged in the ice slurry pool, cold water cavity and air cavity, and the outer side walls of the primary heat exchange pipe, secondary heat exchange pipe and tertiary heat exchange pipe are uniformly distributed with fins, and the device has good heat transfer efficiency when running.

[0054] When the industrial production cold demand is low-grade cold, the cold medium enters the ice slurry pool heat exchange pipeline and fully exchanges heat with the low-temperature ice slurry, the medium carries cold after heat exchange, and the cold is supplied to the industrial cold scene, and the cold is returned to the ice slurry pool heat exchange pipeline after release, and the cycle is repeated.

[0055] When the industrial and building cold demand is cold water, the cold water from the cold water cavity leaves the device through the pipeline and enters the industrial cold scene to release cold, and returns to the cold water cavity after releasing cold for heat exchange, and the cold storage and release cycle is carried out.

[0056] When the industrial and building cold demand is cold air, the cold air in the air cavity enters the industrial cold scene, and returns to the air cavity after releasing cold for continuous circulation.

[0057] The application is suitable for industrial enterprises with multi-grade refrigeration and cold storage demand.

[0058] The above-mentioned embodiments are only the preferred schemes of the application, and do not limit the application in any form, and there are other variants and modifications without exceeding the technical scheme recorded in the claims.

Claims

1. A cold storage device for industrial multi-grade cold demand, characterized by, The utility model relates to a kind of ice slurry pool, cold water cavity and air cavity are sequentially arranged from inside to outside;Ice slurry pool is provided with a first heat exchange component, cold water cavity is provided with second heat exchange component, air cavity is provided with third heat exchange component;First heat exchange component and second heat exchange component are communicated, second heat exchange component and third heat exchange component are communicated;So that cold energy can be realized in ice slurry pool, cold water cavity and air cavity Gradual heat exchange, cascade utilization. First heat exchange component includes the first heat exchange pipe of being arranged in the bottom of ice slurry pool, the first heat exchange manifold of being arranged in the top of ice slurry pool, a plurality of first heat exchange pipes being communicated with first heat exchange pipe.

2. The industrial multi-grade cold demand-oriented cold storage device according to claim 1, characterized by, First heat exchange pipe is C-shaped, first heat exchange pipe and first heat exchange manifold are arranged in parallel, first heat exchange pipe is staggered along the length direction of first heat exchange pipe and is arranged in the two sides of first heat exchange pipe.

3. The industrial multi-grade cold demand-oriented cold storage device according to claim 2, characterized by, Second heat exchange component includes the second heat exchange pipe of being arranged in the top of ice slurry pool and cold water cavity, the second heat exchange manifold of being arranged in the bottom of ice slurry pool, the second heat exchange pipe being arranged in cold water cavity and being communicated with second heat exchange pipe and second heat exchange manifold;Second heat exchange pipe and first heat exchange component are communicated by first connecting pipe.

4. The industrial multi-grade cold demand-oriented cold storage device according to claim 1, characterized by, Third heat exchange component includes the third heat exchange pipe being arranged in air cavity and being arranged along the axial direction of air cavity, third heat exchange pipe and second heat exchange manifold are communicated.

5. The industrial multi-grade cold demand-oriented cold storage device according to claim 1, characterized by Ice slurry pool, cold water cavity and air cavity are all cylindrical, and ice slurry pool, cold water cavity and air cavity are concentrically arranged.

6. The industrial multi-grade cold demand-oriented cold storage device according to any one of claims 1 to 5, characterized by, Ice slurry pool is provided with ice slurry stirring device, and ice slurry stirring device includes rotating shaft, a plurality of blades arranged on rotating shaft, electric device for driving rotating shaft to rotate;Two ends of rotating shaft are rotatably arranged on ice slurry pool top plate and ice slurry pool bottom plate.

7. The industrial multi-grade cold demand-oriented cold storage device according to claim 6, characterized by Rotating shaft is eccentrically arranged in ice slurry pool.

8. The industrial multi-grade cold demand-oriented cold storage device according to claim 7, characterized by Ice slurry pool and cold water cavity are arranged in heat preservation cavity;Ice slurry pool, cold water cavity and air cavity are of equal height, and waterproof heat insulation material is laid on the side wall.

9. The industrial multi-grade cold demand-oriented cold storage device according to any one of claims 1 to 5, characterized by, The outer side wall of first heat exchange pipe, second heat exchange pipe and third heat exchange pipe is uniformly distributed with fin, and fin is arranged along the length direction of pipe body.

10. The industrial multi-grade cold demand-oriented cold storage device according to any one of claims 1 to 5, characterized by ​

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