CN202361723U - Circulating type binary ice refrigerator - Google Patents

Abstract

The utility model discloses a circulation type binary ice refrigerator, which comprises an ice slurry purifier, a pump, a liquid storage tank, a refrigeration pipe connected with a refrigerator, and a storage refrigerator which are sequentially connected through pipelines, and the inside of the pipeline has ice slurry The pump is a booster pump; the pressure of the ice slurry in the liquid storage tank and the refrigeration pipe is 0.15MPa to 3MPa, and the temperature of the ice slurry near the jet outlet of the refrigeration pipe is -5°C to 4°C; A throttling valve that limits the pressure of ice slurry in the liquid storage tank and refrigeration pipe; the liquid storage tank is provided with a one-way input device that can feed gas or liquid in one direction. The utility model has the advantages of novel structure, high purification efficiency, low maintenance cost, suitable for large-scale use, compact structure and water saving.

Description

Circulating Binary Ice Refrigerator

technical field

The utility model relates to a circulating refrigeration device, in particular to a circulating binary ice refrigerator.

Background technique

Binary ice refers to a mixture of certain types of aqueous solution and ice crystal particles. It is a slurry-like suspension that has good fluidity and can be pumped. It is also commonly called "ice slurry". Because the binary ice contains ice crystal particles, it will absorb a large amount of heat of melting when the ice crystals melt (the heat of melting of ice is about 335kJ/kg), which increases the heat capacity per unit volume of the fluid. At the same time, studies have shown that under a certain ice content, binary ice can act as a drag reducer to some extent, and its resistance loss in the pipeline per unit length is smaller than that of water, thereby reducing the pump’s power consumption. Therefore, binary ice is a promising cooling medium. In recent years, the production, research and application of binary ice (or ice slurry, Ice Slurry) has attracted more and more attention from the ice-making industry. Since there is no ice layer on the solid heat transfer surface or the thickness of the ice layer is very small during the binary ice preparation process, the heat transfer coefficient is large during the ice making process, the heat transfer temperature difference is small, and the COP of the system is significantly improved. Due to the small size of binary ice ice crystal particles, it can achieve a high ice surface area. If binary ice is used for ice storage, it will undoubtedly make ice storage technology more economical and effective, not only can achieve higher thermal efficiency of ice production, but also It can also achieve a small melting temperature difference and a high melting rate. In addition to being suitable for ice-storage air conditioners, binary ice can also enable large-scale ice storage in many chemical or other industries where the temperature is slightly higher than 0°C. The existing binary ice preparation methods mainly include supercooled water ice making method, direct contact ice making method, scraping ice making method, and fluidized bed ice making method, but all the above-mentioned preparation methods have many shortcomings, which are reflected in the above Due to the particularity of the ice-making process, a special evaporator needs to be designed. For example, the supercooled water ice-making method requires very precise control of the evaporation temperature, and the technical difficulty is very high. Moreover, the IPF after primary cooling by the subcooler is 2%. Icing in the cooler occurs too frequently, and the necessary measures to melt the ice reduce the reliability and energy efficiency of the system. The direct contact ice-making method requires that the two media in contact do not dissolve each other, so the choice of refrigerants is narrow, and there is a problem of performance degradation after a period of operation. The scraping ice-making method must be equipped with rotating blades driven by an external motor. Its structure and manufacturing process are complex, energy consumption is large, and the failure rate is high. During the operation of the fluidized bed ice-making system, the temperature and flow rate of the water on the wall and the size of the ice crystals must be controlled. At the same time, it is necessary to prevent ice blockage of the heat exchange tubes. It is difficult to achieve these control requirements at the same time. Existing binary ice preparation devices emerge in endlessly, such as the Chinese utility model patent "A Preparation Device for Binary Ice", Patent No. ZL200720073247.1, which discloses a preparation device for binary ice, including: a vacuum chamber, the vacuum The top of the chamber is provided with a water-catching cooling coil, a nozzle, and a non-condensable gas discharge port; the bottom of the vacuum chamber is provided with a binary ice discharge port; a condensing unit is connected to the water-catching cooling coil; the vacuum A vacuum pump for evacuating the vacuum chamber, the inlet of the vacuum pump is connected to the non-condensable gas outlet of the vacuum chamber through a connecting pipe; the ice slurry pump for pumping the binary ice out of the vacuum chamber, the inlet of the ice slurry pump is connected with the The outlet of the vacuum pump is connected; the water pump used to prepare the binary ice is pumped to the nozzle for spraying. The utility model has the advantages of simple structure, convenient operation, low energy consumption, and is not prone to ice blockage; the utility model is used to prepare binary ice, which solves the problem of thermal resistance of the ice layer in the traditional ice making method. However, the supporting devices of the binary ice system have yet to be further developed to meet the actual needs.

Contents of the invention

The purpose of the utility model is to provide a circulating binary ice refrigerator with novel structure, high purification efficiency, low maintenance cost, suitable for large-scale use, compact structure and water saving in view of the prior art.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is: a circulating binary ice refrigerator, which includes an ice slurry purifier, a pump, a liquid storage tank, a refrigeration pipe connected with a refrigerator, and a storage refrigerator connected in sequence through pipelines, And there is ice slurry inside the pipeline; the pump is a booster pump; the pressure of the ice slurry in the liquid storage tank and the refrigeration pipe is 0.15MPa to 3MPa, and the temperature of the ice slurry near the jet outlet of the refrigeration pipe is -5°C to 4°C ; The jet outlet of the refrigeration pipe is equipped with a throttle valve capable of limiting the pressure of the ice slurry in the liquid storage tank and the refrigeration pipe; the liquid storage tank is equipped with a one-way input device that can feed gas or liquid in one direction. The ice slurry enters the liquid storage tank and the refrigeration pipe after being pressurized by the booster pump. Due to the high pressure, the ice slurry is in a liquid state. Moreover, the carbon dioxide fed into the liquid storage tank dissolves into the ice slurry to form a low-temperature and high-pressure saturated carbon dioxide solution. When the ice slurry containing a large amount of carbon dioxide is ejected from the throttle valve, the pressure drops suddenly. Under the joint action of carbon dioxide precipitation and ice slurry freezing, ice crystals are formed in the ice slurry to produce binary ice, which is stored in the storage refrigerator. Use as needed. After the used ice slurry is treated and purified by the ice slurry purifier, it is pressurized by the booster pump and then enters the liquid storage tank for reuse.

In order to optimize the above technical solutions, the measures taken also include:

The ice slurry purifier has a barrel body; the upper edge of the barrel body is equipped with a functional sheet; the functional sheet is covered with an upper casing, and the functional sheet and the upper casing are clamped to form a spiral water inlet, and the end of the spiral water inlet is made There is an injection port that can eject the fluid in a spiral; a cylindrical secondary sedimentation bucket is coaxially arranged on the central axis in the barrel body; the upper part of the side circumference of the secondary sedimentation bucket is equipped with a fairing with water holes evenly distributed . The spiral water inlet pre-compresses the initially inflowing binary ice-slurry mixture and forms a ring flow to flow between the fairing and the inner wall of the barrel through the injection port. After centrifugation, the larger particles of dirt in the binary ice-slurry mixture fall to the bottom of the barrel. The binary ice-slurry mixture that has been purified for the first time enters the secondary settling bucket through the water hole and then settles again, and then is discharged through the pipeline on the functional chip.

The middle part of the functional plate is made with a through pipe body, the upper end of the pipe body is a recovery pipe that passes through the upper casing and the lower end part of the pipe body extends into the middle of the secondary sedimentation tank and the end is formed with a recovery hole; recovery A recovery aileron is formed near the upper edge of the hole working face. The recovery pipe is connected to external equipment for centralized recovery of the purified ice-slurry mixture. The recovery hole is used for final filtration and reduced flow rate of the binary ice slurry mixture. The function of the recovery flap is to form a squeeze area between the recovery flap and the inner side of the secondary settling bucket, so that the ice slurry forms a relatively high flow rate area in the downward direction in this area.

The lower end of the tube body of the functional sheet is generally an inverted conical structure, and the cone has a notch, wherein recovery holes are evenly distributed on the plane of the notch. The inverted conical structure can gradually increase the cross-sectional area through which the liquid flows, thereby reducing the flow velocity and facilitating the sedimentation of dirt. The cone has a gap that is one-tenth of the cone cut away, and is filled with a flat plate with evenly distributed recovery holes. The suction direction of the recovery holes is just opposite to the flow direction of ice slurry, which can effectively reduce the suction probability of dirt.

The upper part of the secondary settling barrel only has a liquid inlet ring pipe that can introduce fluid from the outside and form a loop to spray fluid into the secondary settling barrel through the liquid outlet; the part near the lower end of the secondary settling barrel is made with spiral leaves. The binary ice-ice slurry enters the liquid inlet ring pipe and forms a circulation again, and then sprays out from the liquid outlet into the secondary sedimentation bucket, accelerating the centrifugal effect, and the sundries spiral down and fall to the bottom through the spiral blades. Moreover, the spiral leaf can prevent the bottom dirt from recoiling and avoid secondary pollution.

Water holes are evenly distributed below the middle part of the side of the fairing; protruding primary rectifying wings are formed near the middle part of the side of the fairing; protruding secondary rectifying wings are formed on the lower edge of the side of the fairing. Both the primary rectifying wing and the secondary rectifying wing are used to form a speed difference and increase the precipitation effect. The secondary rectifying wing has a larger area than the primary rectifying wing, and it also has the function of preventing the bottom dirt from recoiling.

A sunken annular groove is formed at the bottom of the barrel close to the side; a main sewage pipe runs through the center of the bottom of the barrel; and an auxiliary sewage pipe is arranged near the bottom of the groove. The annular groove facilitates the suction of dirt by the main drain pipe.

The initial end of the spiral water inlet of the upper shell is a connecting port. The port is used for quick connection with external equipment.

Because the circulating type binary ice refrigerator of the utility model adopts a circulating type binary ice refrigerator, it includes an ice slurry purifier, a pump, a liquid storage tank, a refrigeration pipe connected with a refrigerator, and a storage refrigerator connected in sequence through pipelines. And there is ice slurry inside the pipeline; the pump is a booster pump; the pressure of the ice slurry in the liquid storage tank and the refrigeration pipe is 0.15MPa to 3MPa, and the temperature of the ice slurry near the jet outlet of the refrigeration pipe is -5°C to 4°C ; The jet outlet of the refrigeration pipe is equipped with a throttle valve capable of limiting the pressure of the ice slurry in the liquid storage tank and the refrigeration pipe; the liquid storage tank is provided with a structure of a one-way input device that can feed gas or liquid in one direction. The ice slurry enters the liquid storage tank and the refrigeration pipe after being pressurized by the booster pump. Due to the high pressure, the ice slurry is in a liquid state. Moreover, the carbon dioxide fed into the liquid storage tank dissolves into the ice slurry to form a low-temperature and high-pressure saturated carbon dioxide solution. When the ice slurry containing a large amount of carbon dioxide is ejected from the throttle valve, the pressure drops suddenly. Under the joint action of carbon dioxide precipitation and ice slurry freezing, ice crystals are formed in the ice slurry to produce binary ice, which is stored in the storage refrigerator. Use as needed. After the used ice slurry is treated and purified by the ice slurry purifier, it is pressurized by the booster pump and then enters the liquid storage tank for reuse. The utility model has the advantages of novel structure, high purification efficiency, low maintenance cost, suitable for large-scale use, compact structure and water saving.

Description of drawings

Fig. 1 is the schematic diagram of pipeline structure of the utility model embodiment;

Fig. 2 is the sectional structure schematic diagram of the ice slurry purifier of the utility model embodiment;

Fig. 3 is a schematic structural diagram of the front view of the spiral scraper according to the embodiment of the utility model;

Fig. 4 is a schematic diagram of the structure of the refrigeration tube of the embodiment of the utility model.

Detailed ways

Below in conjunction with attached embodiment the utility model is described in further detail.

Description of reference numerals: booster pump 1, refrigeration pipe 2, throttle valve 21, storage bin 3, motor 31, transmission shaft 31a, liquid storage tank 4, spiral scraper 5, central shaft 51, scraper blade 52, knife edge 52a , rectification angle 52b, ice slurry 6, ice-making catalyst 7, refrigerator 8, low-temperature heat exchange fluid 8a, ice slurry purifier 9, bucket body 91, auxiliary sewage pipe 911, main sewage pipe 912, groove 913, upper shell Body 92, connection port 921, spiral water inlet 922, functional sheet 93, recovery hole 931, recovery aileron 932, recovery pipe 933, injection port 934, secondary sedimentation bucket 94, spiral blade 941, liquid inlet ring pipe 942, Liquid outlet 943 , fairing 95 , primary rectifying wing 951 , secondary rectifying wing 952 , and water hole 953 .

Embodiment: Referring to Fig. 1 to Fig. 4, a circulating binary ice refrigerator includes an ice slurry purifier 9, a pump, a liquid storage tank 4, a refrigeration pipe 2 connected with a refrigerator 8, and a storage bin 3 connected in sequence through pipelines , and there is an ice slurry 6 inside the pipeline; the pump is a booster pump 1; the pressure of the ice slurry 6 in the liquid storage tank 4 and the refrigeration pipe 2 is 0.15MPa to 3MPa, preferably 3MPa in this embodiment, and the ice slurry 6 is located in The temperature near the jet outlet of the refrigeration pipe 2 is -5°C to 4°C, preferably 0.2°C in this embodiment; a throttling that can limit the pressure of the ice slurry 6 in the liquid storage tank 4 and the refrigeration pipe 2 is installed on the jet outlet of the refrigeration pipe 2 Valve; the liquid storage tank 4 is shaped on a one-way input device that can feed gas or liquid in one direction. The ice slurry 6 enters the liquid storage tank 4 and the refrigeration pipe 2 after being pressurized by the booster pump 1. Because the pressure is relatively high, the ice slurry 6 is in a liquid state. Moreover, the carbon dioxide fed into the liquid storage tank 4 dissolves into the ice slurry 6 to form a low-temperature and high-pressure saturated carbon dioxide solution. When the ice slurry 6 dissolved in a large amount of carbon dioxide is ejected from the throttle valve, the pressure drops suddenly. Under the joint action of the precipitation of carbon dioxide and the freezing of the ice slurry 6, ice crystals are formed in the ice slurry 6 to produce binary ice, which is stored in Take as needed in the storage bin 3. After the used ice slurry 6 is treated and purified by the ice slurry purifier 9, it is pressurized by the booster pump 1 and enters the liquid storage tank 4 for reuse.

The ice slurry purifier 9 has a bucket body 991; the upper edge of the bucket body 991 is equipped with a functional piece 993; the functional piece 993 is set with an upper casing 92, and the functional piece 93 and the upper casing 92 are sandwiched to form a spiral water inlet 922, and the end of spiral water inlet 922 is shaped on the injection port 934 that fluid spiral can be sprayed out; Coaxially is provided with cylindrical secondary settling bucket 94 on the central axis in staving body 91; Secondary settling bucket 94 side The upper part of the circumference is provided with a fairing 95 evenly distributed with water holes 953 . The spiral water inlet channel 922 pre-compresses the initially inflowing binary ice-slurry mixture and forms a ring flow through the injection port 934 to flow between the fairing 95 and the inner wall of the bucket body 91 . Through centrifugation, the larger particles of dirt in the binary ice-slurry mixture fall into the bottom of the barrel body 91 . The primary purified binary ice-slurry mixture enters the secondary settling bucket 94 through the water hole 953 for re-precipitation, and then is discharged through the pipeline on the functional sheet 93 .

The middle part of the functional piece 93 is formed with a through pipe body, the upper end of the pipe body is a recovery pipe 933 that passes through the upper housing 92, and the lower end part of the pipe body extends into the middle part of the secondary settling bucket 94 and the end is formed with a Recovery hole 931; recovery aileron 932 is formed near the upper edge of the recovery hole 931 working surface. The recovery pipe 933 is connected to external equipment to centrally recover the purified ice-slurry mixture. Recovery hole 931 is used for final filtration and flow reduction of the binary ice slurry mixture. The function of the recovery flap 932 is to form a squeezing area between the recovery flap 932 and the inner side of the secondary settling bucket 94, so that the ice slurry forms a relatively high flow rate area in the downward direction in this area.

The lower end of the tube body of the functional piece 93 is generally an inverted conical structure, and the cone has a notch, wherein recovery holes 931 are evenly distributed on the plane of the notch. The inverted conical structure can gradually increase the cross-sectional area through which the liquid flows, thereby reducing the flow velocity and facilitating the sedimentation of dirt. The cone has a gap that is one tenth of a cone cut away, and is filled with a flat plate that is evenly distributed with recovery holes 931. The suction direction of the recovery holes 931 is just opposite to the flow direction of ice slurry, which can effectively reduce the suction probability of dirt.

The upper part of the secondary settling bucket 94 has only the liquid inlet ring pipe 942 that can introduce fluid from the outside and form a ring flow through the liquid outlet 943 to inject fluid into the secondary settling bucket 94; 941. The binary ice-ice slurry enters the liquid inlet ring pipe 942 and forms a circulation again, and then sprays out from the liquid outlet 943 into the secondary settling bucket 94 to accelerate the centrifugation, and the sundries spiral down and fall to the bottom through the spiral blade 941. Moreover, the spiral blade 941 can prevent the bottom dirt from recoiling and avoid secondary pollution.

Water hole 953 is evenly distributed below fairing 95 side middle parts; Fairing 95 side middle parts are shaped on protruding primary rectifying wings 951; Both the primary rectifying wing 951 and the secondary rectifying wing 952 are used to form a speed difference and increase the sedimentation effect. The secondary rectifying wing 952 has a larger area than the primary rectifying wing 951, and also has the function of preventing the bottom dirt from recoiling.

The portion near the side of the bottom of the barrel body 91 is shaped with a sunken annular groove 913; near the center of the bottom of the barrel body 91 is provided with a main drain pipe 912; near the bottom of the groove 913 is provided with a secondary drain pipe 911. The annular groove 913 facilitates the main sewage pipe 912 to absorb dirt.

The initial end of the spiral water inlet 922 of the upper casing 92 is a connecting port 921 . The port 921 is used for quick connection with external devices.

Higher pressure can increase the solubility of carbon dioxide. During the subsequent depressurization process, due to the corresponding decrease in solubility, it can intensify the precipitation of carbon dioxide and form tiny bubbles, thereby reducing the particle size of binary ice crystals. Also can adopt ice making catalyst 7 to make ice slurry 6 dissolve to have higher carbon dioxide. The inside of the storage bin 3 is provided with a spiral scraper 5, and the injection direction of the throttle valve is toward the part where the spiral scraper 5 is in contact with the storage bin 3; the spiral scraper 5 is connected to the motor 31 through a transmission shaft 31a. The injection of the throttle valve makes the ice slurry 6 containing binary ice and ice crystal particles easy to accumulate ice crystals on the inner surface of the storage bin 3. A spiral scraper 5 is arranged at this position to disperse the ice crystal particles, prevent the ice crystals from gathering and the particles become larger, and thus can The fluidity of the ice slurry 6 is effectively improved. The spiral scraper 5 has at least two scraper blades 52 arranged radially; the scraper blade 52 is formed with a knife edge 52a and a sharp rectification angle 52b opposite to the knife edge 52a; the knife body of the scraper blade 52 is arc-shaped. The arc-shaped scraper blade 52 can reduce noise. Bubbles are generated on the surface of the rotating spiral scraper 5 due to partial vacuum, and noise is generated when these bubbles burst. This design enables the generated air bubbles to move to the rectifying angle 52b along the arc-shaped scraper blade 52, so that the air bubbles gather and become larger, reducing the number of air bubbles, and the large air bubbles are not easy to burst, and will become smaller and disappear after returning to the non-vacuum state in the water. The cooling tube 2 is a sleeve structure, and there is a low-temperature heat exchange fluid 8a for heat exchange between the inner tube and the outer tube of the sleeve structure, and the freezing point of the low-temperature heat exchange fluid 8a is lower than the freezing point of the ice slurry 6 . The refrigerator 8 exchanges heat with the ice slurry 6 through the low-temperature heat-exchange fluid 8a, so the low-temperature heat-exchange fluid 8a should not be overcooled and solidified during this process, so a low-temperature heat-exchange fluid 8a with a lower freezing point is used.

Although the utility model has been described in conjunction with the preferred embodiment, it is not intended to limit the utility model, any skilled in the art, without departing from the spirit and scope of the utility model, can make reference to the utility model listed here The subject matter is subject to various changes, substitutions of equivalents and modifications, so the scope of protection of the present invention should be determined only by the scope defined by the appended claims.

Claims (8)

1. The circulation type binary ice refrigerator is characterized in that it includes an ice slurry purifier (9), a pump, a liquid storage tank (4), a refrigeration pipe (2) connected to a refrigerator (8), and The storage tank (3), and the pipeline has ice slurry (6) inside; the pump is a booster pump (1); the ice in the liquid storage tank (4) and the refrigeration pipe (2) The pressure of the slurry (6) is 0.1MPa to 4MPa, and the temperature of the ice slurry (6) near the jet outlet of the refrigeration pipe (2) is -5°C to 4°C; The throttle valve for the pressure of the ice slurry (6) in the liquid storage tank (4) and the refrigeration pipe (2); the liquid storage tank (4) is equipped with a single valve that can let gas or liquid into one direction. to the input device. 2. The circulating binary ice refrigerator according to claim 1, characterized in that: the ice slurry purifier (9) has a barrel body (991); the upper edge of the barrel body (991) fits There is a functional piece (993); the functional piece (993) is sleeved with an upper casing (92), and the functional piece (93) and the upper casing (92) are sandwiched to form a spiral water inlet ( 922), and the end of the spiral water inlet (922) is formed with an injection port (934) capable of spirally ejecting the fluid; the central axis in the barrel (91) is coaxially provided with a cylindrical The secondary settling bucket (94); the upper part of the side circumference of the secondary settling bucket (94) is provided with a fairing (95) uniformly distributed with water holes (953). 3. The circulation type binary ice refrigerator according to claim 2, characterized in that: the middle part of the functional plate (93) is made with a through pipe body, and the upper end of the pipe body passes through the outward The recovery pipe (933) protruding from the upper casing (92), the lower end of the pipe extends into the middle of the secondary sedimentation bucket (94) and the end is formed with a recovery hole (931); the recovery hole ( 931) recovery aileron (932) is shaped on the vicinity of the upper edge of the working face. 4. The circulating binary ice refrigerator according to claim 3, characterized in that: the lower end of the tube body of the functional plate (93) is generally an inverted conical structure, and the cone has a gap, where the Recovery holes (931) are evenly distributed on the plane of the gap. 5. The circulating binary ice refrigerator according to claim 4, characterized in that: the upper part of the secondary settling bucket (94) can only introduce fluid from the outside and form a circular flow through the liquid outlet (943) to The liquid inlet ring pipe (942) for injecting fluid in the secondary settling bucket (94); the part near the lower end of the secondary settling bucket (94) is made with spiral vanes (941). 6. The circulation type binary ice refrigerator according to claim 2, characterized in that: water holes (953) are evenly distributed below the middle part of the side of the fairing (95); the fairing (95) A protruding primary rectifying wing (951) is formed near the middle of the side; a protruding secondary rectifying wing (952) is formed on the lower edge of the side of the fairing (95). 7. The circulating binary ice refrigerator according to claim 2, characterized in that: the bottom part of the barrel (91) near the side is formed with a sunken annular groove (913); (91) A main sewage discharge pipe (912) runs through near the center of the bottom; a secondary sewage discharge pipe (911) is provided near the bottom of the groove (913). 8. The circulating binary ice refrigerator according to claim 2, characterized in that: the initial end of the spiral water inlet (922) of the upper casing (92) is a connection port (921).

Images