Pump-free absorption refrigeration device

Abstract

The invention discloses a pump-free absorption refrigeration device which comprises a lithium bromide solution circulating system and a refrigerant water circulating system, the lithium bromide solution circulating system comprises a generator, a gas-liquid separator and an absorber, the generator and the gas-liquid separator are connected through a thermosiphon, an electric heating wire is arranged in the thermosiphon, and the absorber is connected with the electric heating wire. And the absorber is connected with the generator through a return pipe. By the adoption of the pump-free absorption refrigeration device, energy consumption is reduced, and reliability is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigeration, and in particular relates to a pumpless absorption refrigeration device. Background Art

[0002] In the field of ore smelting plants, a large amount of refrigeration is required. Refrigeration equipment mainly includes compression refrigeration equipment and absorption refrigeration equipment. Absorption refrigeration equipment is driven by thermal energy and adopts binary or multi-element working fluid pairs. It realizes refrigeration and heating by evaporation and condensation of low-boiling point components (refrigerants), and completes the whole cycle by absorption and desorption of high-boiling point components (absorbents). The absorption working fluid of lithium bromide absorption refrigeration equipment is lithium bromide solution, and the refrigerant working fluid is water. It has developed rapidly due to its advantages such as quiet operation, wide range of cooling capacity adjustment, and no damage to the ozone layer.

[0003] At present, lithium bromide absorption refrigeration equipment needs to be equipped with a circulation pump when realizing the circulation of lithium bromide solution. This not only consumes energy and generates noise, but is also prone to failure due to the corrosiveness of the working fluid. Summary of the invention

[0004] In view of this, an object of the present invention is to provide a pumpless absorption refrigeration device so as to save energy and improve reliability.

[0005] The present invention solves the above problems by the following technical means:

[0006] The present invention provides a pumpless absorption refrigeration device, comprising a lithium bromide solution circulation system and a refrigerant water circulation system, wherein the lithium bromide solution circulation system comprises a generator, a gas-liquid separator and an absorber, wherein the generator and the gas-liquid separator are connected via a thermal siphon, wherein an electric heating wire is arranged in the thermal siphon, and the absorber and the generator are connected via a reflux pipe.

[0007] Furthermore, the inner wall of the thermosiphon is provided with a heat-insulating layer.

[0008] Furthermore, the outer side wall of the electric heating wire is provided with heat conducting ribs.

[0009] Furthermore, the refrigerant water circulation system includes a condenser, an evaporator, a refrigerant water circulation pipe and a cooling tower, the air outlet of the gas-liquid separator is connected to the air inlet of the condenser, the air outlet of the condenser is connected to the evaporator, the liquid outlet of the gas-liquid separator is connected to a spray infusion pipe extending to the absorber, and the evaporator is connected to a refrigerant water pipe.

[0010] Furthermore, a heat exchanger is included, and the spray infusion tube is bent and flows through the heat exchanger.

[0011] Furthermore, an ultrasonic transducer is arranged at the bottom of the generator.

[0012] Beneficial effects of the present invention:

[0013] The dynamic shaft pumpless absorption refrigeration device of the present application comprises a lithium bromide solution circulation system and a refrigerant water circulation system, wherein the lithium bromide solution circulation system comprises a generator, a gas-liquid separator and an absorber, wherein the generator and the gas-liquid separator are connected via a thermosiphon, wherein an electric heating wire is arranged in the thermosiphon, and the absorber and the generator are connected via a reflux pipe. The pumpless absorption refrigeration device of the present application saves energy consumption and improves reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a structural schematic diagram of a preferred embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present invention will become clearer and more specific. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0017] like Figure 1 As shown, this embodiment discloses a pumpless absorption refrigeration device, including a lithium bromide solution circulation system and a refrigerant water circulation system, wherein the lithium bromide solution circulation system includes a generator 2, a gas-liquid separator 6 and an absorber 10, wherein the generator and the gas-liquid separator are connected via a thermosiphon 3, wherein an electric heating wire 4 is arranged in the thermosiphon, and the absorber and the generator are connected via a reflux pipe. The inner wall of the thermosiphon is provided with a heat-insulating layer. The outer wall of the electric heating wire is provided with a heat-conducting fin. The refrigerant water circulation system includes a condenser 7, an evaporator 9, a refrigerant water circulation pipe 11 and a cooling tower 12, wherein the gas outlet of the gas-liquid separator is connected to the gas inlet of the condenser, the gas outlet of the condenser is connected to the evaporator, the liquid outlet of the gas-liquid separator is connected to a spray infusion pipe 5 extending to the absorber, and the evaporator is connected to a refrigerant water pipe 8. A heat exchanger 13 is also included, wherein the spray infusion pipe is bent and flows through the heat exchanger.

[0018] Specific refrigeration process:

[0019] In the gas-liquid separator, water vapor enters the condenser to exchange heat with the refrigerant water, first cooled and then condensed, and then enters the evaporator for falling film evaporation, transferring the cold to the refrigerant water. The evaporated water vapor enters the absorber and is absorbed.

[0020] The lifted high-temperature concentrated solution flows through the intermediate concentration heat exchanger, exchanges heat with the dilute solution from the absorber, and then cools down, and overcomes resistance through potential difference to enter the absorber. The concentrated solution is evenly sprinkled on the outer surface of the refrigerant water circulation pipe through the upper liquid distributor, flows down in a film shape, and absorbs water vapor from the evaporator side.

[0021] The dilute solution formed by the confluence enters the heat exchanger with intermediate concentration to exchange heat and heat up, and then enters the bottom generator, thereby realizing the circulation of lithium bromide solution and refrigerant water in the refrigeration system.

[0022] In the present application, a thermal siphon is used to lift the lithium bromide solution, thereby eliminating the need for a solution pump, saving energy, reducing system volume, and reducing system costs.

[0023] In addition, through the continuous heating of the electric heating wire and the diversion effect of the heat-conducting fins, the thermosyphon can be designed with a large diameter, thereby achieving a larger cooling capacity. In addition, the thermosyphon has a simple structure, requires a small heating power of the electric heating wire, is easy to control, and has a low cost, which meets technical and economic requirements.

[0024] As a further improvement to the above technical solution, an ultrasonic transducer 1 is provided at the bottom of the generator. The ultrasonic wave acts on the gas-liquid interface, and the liquid surface is raised through the ultrasonic directional pressure. The ultrasonic wave produces cavitation and micro-disturbance on the raised liquid surface, thereby causing an atomization effect at the gas-liquid interface. These effects greatly reduce the viscosity of the solution at the gas-liquid interface and reduce the thickness of the liquid film in the mass transfer layer, thereby accelerating the separation and mass transfer process of the refrigerant water in the lithium bromide solution. In this way, an ultrasonic transducer of a certain power is placed at the bottom of the generator device, a suitable sound wave frequency is set, and the distance from the liquid surface is adjusted. The mass transfer process is strengthened at a given heat source temperature, the cooling capacity of the absorption refrigeration system is increased, the system startup time is shortened, and the system response speed is improved.

[0025] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A pumpless absorption refrigeration device, comprising a lithium bromide solution circulation system and a refrigerant water circulation system, characterized in that: The lithium bromide solution circulation system comprises a generator, a gas-liquid separator and an absorber. The generator and the gas-liquid separator are connected via a thermal siphon, an electric heating wire is arranged in the thermal siphon, and the absorber and the generator are connected via a reflux pipe.

2. The pumpless absorption refrigeration device according to claim 1, characterized in that: The inner side wall of the thermosiphon is provided with a heat-insulating layer.

3. The pumpless absorption refrigeration device according to claim 2, characterized in that: The outer side wall of the electric heating wire is provided with heat conducting ribs.

4. The pumpless absorption refrigeration device according to claim 3, characterized in that: The refrigerant water circulation system includes a condenser, an evaporator, a refrigerant water circulation pipe and a cooling tower. The air outlet of the gas-liquid separator is connected to the air inlet of the condenser, the air outlet of the condenser is connected to the evaporator, the liquid outlet of the gas-liquid separator is connected to a spray infusion pipe extending to the absorber, and the evaporator is connected to a refrigerant water pipe.

5. The pumpless absorption refrigeration device according to claim 4, characterized in that: It also includes a heat exchanger, and the spray infusion tube is bent and flows through the heat exchanger.

6. The pumpless absorption refrigeration device according to any one of claims 1 to 5, characterized in that: An ultrasonic transducer is arranged at the bottom of the generator.

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