Sodium nitrate cold-carrying type magnetic levitation evaporative cooling unit

Abstract

The utility model belongs to evaporative cooling unit technical field especially relates to a sodium nitrate cold-carrying type magnetic suspension evaporative cooling unit, including evaporimeter, compressor, liquid accumulator and condenser, evaporimeter, compressor, liquid accumulator and condenser are connected through refrigerant circulation pipe, be provided with liquid inlet pipe and liquid outlet pipe on the evaporimeter, be provided with anti -crystallization device in the condenser, the utility model discloses structure passes through rationalization design, adapts sodium nitrate this kind of high corrosive application scene, can guarantee the stable operation of unit, can ensure that the coolant is in safe temperature zone operation, effectively prevented sodium nitrate in coolant from crystallizing and separating out from saturated solution at low temperature, and gather on the surface of heat exchange coil, block the clearance of heat exchange coil, influence the normal work of condenser, make annual shutdown failure reduce 70%, use magnetic suspension compressor, 35% energy -conserving than traditional unit, and be applicable to the place of low temperature demand.

Description

Technical Field

[0001] This utility model belongs to the technical field of evaporative cooling units, and particularly relates to a sodium nitrate-cooled magnetic levitation evaporative cooling unit. Background Technology

[0002] In chemical production, 20%–30% sodium nitrate solutions are commonly used for applications requiring low-temperature cooling, such as reactor cooling and molten salt energy storage. Using evaporative cooling units to cool sodium nitrate solutions is an effective method in industrial production. Evaporative cooling units employ surface liquid film evaporation and condensation technology, directly evaporating heat to achieve a low condensation temperature and thus cooling the sodium nitrate solution. However, during the cooling process, the heat exchange coils of the condenser are at risk of crystallization and blockage. Sodium nitrate crystals accumulate on the outer surface of the heat exchange coils, clogging the gaps between them. This prevents sprayed cooling water from passing through the gaps, causing the condenser to malfunction and affecting the normal operation of the evaporative cooling unit. Furthermore, high-concentration sodium nitrate solutions can corrode both the evaporator and condenser, affecting the service life of the evaporative cooling unit. (Heat exchange coils) Utility Model Content

[0003] The main technical problem to be solved by this utility model is to provide a sodium nitrate-cooled magnetic levitation evaporative chiller unit that has a reasonable structure, is corrosion-resistant, can prevent the risk of crystallization, and operates with high efficiency.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A sodium nitrate-cooled magnetic levitation evaporative chiller unit includes an evaporator, a compressor, a liquid receiver, and a condenser. The evaporator, compressor, liquid receiver, and condenser are connected by a refrigerant circulation pipe. The evaporator is equipped with an inlet pipe and an outlet pipe, and the condenser is equipped with an anti-crystallization device.

[0005] The following are further optimizations of the above technical solution by this utility model: The condenser includes a water tank, a heat exchange coil is installed above the water tank, the heat exchange coil is connected to the refrigerant circulation pipe, a spray head is installed above the heat exchange coil, the spray head is connected to the water tank through a coolant pipe, and a circulation pump is installed on the coolant pipe.

[0006] Further optimization: The anti-crystallization device includes a heater, which is fixedly installed inside the water tank.

[0007] Further optimization: The heater includes an electric heating rod.

[0008] Further optimization: A temperature sensor is installed inside the water tank.

[0009] Further optimization: A turbidity sensor is installed inside the water tank.

[0010] Further optimization: An alarm is installed on the condenser.

[0011] Further optimization: Both the evaporator and condenser are made of stainless steel.

[0012] Further optimization: The compressor is a magnetic levitation compressor.

[0013] This utility model, through its rational design, is adapted to highly corrosive applications such as sodium nitrate, ensuring stable unit operation. It ensures that the coolant operates within a safe temperature range, effectively preventing sodium nitrate in the coolant from crystallizing out of the saturated solution at low temperatures and accumulating on the surface of the heat exchange coils, blocking the gaps between the heat exchange coils, and affecting the normal operation of the condenser, thus reducing annual downtime by 70%. It uses a magnetic levitation compressor, which saves 35% more energy than traditional units and is suitable for low-temperature applications.

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the condenser in an embodiment of the present invention.

[0016] In the diagram: 1-Evaporator; 101-Inlet pipe; 102-Outlet pipe; 2-Compressor; 3-Receiver; 4-Condenser; 401-Water tank; 402-Heat exchange coil; 403-Spray head. Detailed Implementation

[0017] like Figure 1-2 As shown, a sodium nitrate-cooled magnetic levitation evaporative chiller unit includes an evaporator 1, a compressor 2, a liquid receiver 3, and a condenser 4. The evaporator 1, compressor 2, liquid receiver 3, and condenser 4 are connected by a refrigerant circulation pipe. The evaporator 1 is provided with an inlet pipe 101 and an outlet pipe 102, which facilitates the entry of sodium nitrate solution into the evaporator 1 from the inlet pipe 101. After being cooled by the evaporator 1, the sodium nitrate solution is output to the customer end from the outlet pipe 102.

[0018] Condenser 4 is an evaporative condenser.

[0019] The condenser 4 includes a water tank 401, a heat exchange coil 402 is installed above the water tank 401, the heat exchange coil 402 is connected to the refrigerant circulation pipe, a spray head 403 is installed above the heat exchange coil 402, the spray head 403 is connected to the water tank 401 through a coolant pipe, a circulation pump is installed on the coolant pipe to facilitate the extraction of coolant from the water tank 401 to the spray head 403, and then spray it onto the heat exchange coil 402 through the spray head 403 to cool the refrigerant. Finally, the coolant flows back into the water tank 401 through the gaps in the heat exchange coil 402. The coolant is a 30% sodium nitrate solution.

[0020] The condenser 4 is equipped with an anti-crystallization device, which effectively prevents sodium nitrate in the coolant from crystallizing out of the saturated solution at low temperature and accumulating on the surface of the heat exchange coil 402, blocking the gaps of the heat exchange coil 402, and preventing the coolant from flowing back to the water tank 401 normally from the surface of the heat exchange coil 402, thus affecting the normal operation of the condenser 4.

[0021] The anti-crystallization device includes a heater, which is fixedly installed inside the water tank 401.

[0022] This design allows the heater to be turned on to regulate the temperature of the coolant in the water tank 401, effectively preventing sodium nitrate in the coolant from precipitating out after cooling and accumulating on the heat exchange coil 402 to block the gaps and affect the normal operation of the condenser 4.

[0023] The heater includes an electric heating rod.

[0024] A temperature sensor is installed inside water tank 401.

[0025] Both the temperature sensor and the heater are electrically connected to the control system of the evaporative chiller.

[0026] With this design, when the temperature sensor detects that the coolant temperature is lower than the set value, the control system turns on the heater to regulate the temperature of the coolant in the water tank 401, thereby preventing the coolant from dropping to the crystallization temperature of sodium nitrate.

[0027] A turbidity sensor is installed inside the water tank 401. The turbidity sensor is electrically connected to the control system, which facilitates the detection of the coolant water quality and prevents impurities in the coolant from mixing with the crystallized sodium nitrate and clogging the gaps of the heat exchange coil 402.

[0028] An alarm is installed on condenser 4, and the alarm is electrically connected to the control system.

[0029] With this design, an alarm will sound when the coolant temperature or water quality exceeds the standard, making it convenient for staff to maintain and repair the condenser 4.

[0030] Both the evaporator 1 and the condenser 4 are made of stainless steel, with 321 stainless steel being the preferred material.

[0031] This design effectively prevents high-concentration sodium nitrate solution from corroding evaporator 1 and condenser 4, thus improving the service life of the evaporative chiller unit.

[0032] Compressor 2 is a magnetic levitation compressor.

[0033] The magnetic levitation compressor uses an active magnetic bearing (AMB), which consists of a radial magnetic bearing and an axial magnetic bearing. The rotor is levitated by electromagnetic force, eliminating the mechanical friction of traditional compressors. It saves 35% more energy than traditional units and is suitable for low-temperature applications.

[0034] For those skilled in the art, any changes, modifications, substitutions, and variations made to the implementation methods without departing from the principles and spirit of this utility model, based on the teachings of this utility model, still fall within the protection scope of this utility model.

Claims

1. A sodium nitrate cold-carrying type magnetic levitation evaporative cooling unit, comprising an evaporator (1), a compressor (2), a liquid accumulator (3) and a condenser (4), characterized in that: The evaporator (1), compressor (2), liquid receiver (3) and condenser (4) are connected by a refrigerant circulation pipe. The evaporator (1) is provided with an inlet pipe (101) and an outlet pipe (102). The condenser (4) is provided with an anti-crystallization device.

2. The sodium nitrate cold-carrying magnetic levitation evaporative chiller unit according to claim 1, characterized in that: The condenser (4) includes a water tank (401), a heat exchange coil (402) is provided above the water tank (401), the heat exchange coil (402) is connected to the refrigerant circulation pipe, a spray head (403) is provided above the heat exchange coil (402), the spray head (403) is connected to the water tank (401) through a coolant pipe, and a circulation pump is installed on the coolant pipe.

3. The sodium nitrate cold-carrying magnetic levitation evaporative chiller unit according to claim 2, characterized in that: The anti-crystallization device includes a heater, which is fixedly installed inside the water tank (401).

4. The sodium nitrate cold-carrying magnetic levitation evaporative chiller unit according to claim 3, characterized in that: The heater includes an electric heating rod.

5. The sodium nitrate cold-carrying magnetic levitation evaporative chiller unit according to claim 4, characterized in that: A temperature sensor is installed inside the water tank (401).

6. A sodium nitrate-cooled magnetic levitation evaporative chiller unit according to claim 5, characterized in that: A turbidity sensor is installed inside the water tank (401).

7. The sodium nitrate cold-carrying magnetic levitation evaporative chiller unit according to claim 6, characterized in that: An alarm is installed on the condenser (4).

8. The sodium nitrate cold-carrying magnetic levitation evaporative chiller unit according to claim 7, characterized in that: Both the evaporator (1) and the condenser (4) are made of stainless steel.

9. The sodium nitrate cold-carrying magnetic levitation evaporative chiller unit according to claim 8, characterized in that: The compressor (2) is a magnetic levitation compressor.

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