CN209054806U - A kind of air cooled condenser suitable for lithium bromide absorption refrigerating set - Google Patents

Abstract

The utility model provides a kind of air cooled condenser suitable for lithium bromide absorption refrigerating set, including water pump, spray thrower, heat exchange pipeline, shell, blower, band fin gravity-type heat pipe group, interior of shell form closed cavity, be filled with cooling water in cavity；Heat exchange pipeline is set in shell, and heat exchange pipeline exports the lower section of cooling water level within the cavity, and refrigeration working medium flows into heat exchange pipeline from heat exchange pipeline import, after heat exchange pipeline flows, is exported and is flowed out from heat exchange pipeline；The outside of shell is equipped with circulating cooling water pipe, and the water outlet of circulating cooling water pipe is connected with the intracorporal spray thrower of chamber is set to, and water pump is set on circulating cooling water pipe；Evaporator section with fin gravity-type heat pipe group is set in the intracorporal cooling water of chamber, and condensation segment is located at the outside of shell, and blower is located at the side of condensation segment.In the utility model, refrigeration working medium flows in heat exchange pipeline, and cooling water flows in cavity, can complete wetting heat exchange pipeline, contact it is more complete, cooling effect is more preferable.

Description

An air-cooled condenser suitable for lithium bromide absorption refrigeration units

technical field

The utility model relates to the technical field of condensers, in particular to an air-cooled condenser suitable for a lithium bromide absorption refrigeration unit.

Background technique

The lithium bromide refrigerator is a lithium bromide absorption refrigerator, and an aqueous solution of lithium bromide is used as the working medium, wherein water is the refrigerant and lithium bromide is the absorbent. Lithium bromide is a salt, white crystal, soluble in water and alcohol, non-toxic, chemically stable, and will not deteriorate. Lithium bromide aqueous solution has strong corrosiveness to steel in the presence of air. Lithium bromide absorption refrigerators can only be used for air conditioning equipment and cold water in the production process because water is used as the refrigerant and the evaporation temperature is above 0 °C. This refrigerator can use low-pressure water vapor or hot water above 75°C as a heat source, so it plays an important role in the utilization of exhaust gas, waste heat, solar energy and low-temperature heat energy.

In lithium bromide absorption refrigeration, because the lithium bromide aqueous solution itself has a high boiling point (1265 ° C) and is extremely difficult to volatilize, it can be considered that the vapor on the liquid surface of the lithium bromide saturated solution is pure water vapor; The saturated partial pressure of water vapor is less than that of pure water; and the higher the concentration, the smaller the saturated partial pressure of water vapor on the liquid surface. Therefore, under the same temperature conditions, the greater the concentration of lithium bromide aqueous solution, the stronger its ability to absorb water, which is why lithium bromide is usually used as the absorbent and water as the refrigerant.

Lithium bromide absorption refrigerator is mainly composed of generator, condenser, evaporator, absorber, heat exchanger, circulating pump and other parts. During the operation of the lithium bromide absorption refrigerator, when the lithium bromide aqueous solution is heated by the heat medium water in the generator, the water in the solution is continuously vaporized; Enter the absorber; the water vapor enters the condenser, is cooled by the cooling water in the condenser, and then condenses to become liquid water with high pressure and low temperature; when the water in the condenser enters the evaporator through the throttle valve, it rapidly expands and vaporizes, and in the During the vaporization process, a large amount of heat of the refrigerant water in the evaporator is absorbed, so as to achieve the purpose of cooling and cooling; in this process, the low-temperature water vapor enters the absorber and is absorbed by the lithium bromide aqueous solution in the absorber, and the concentration of the solution gradually decreases, and then the circulating pump sent back to the generator to complete the cycle. In this way, the cycle is continuous, and the cooling capacity is continuously produced. Since the dilute lithium bromide solution has been cooled in the absorber and the temperature is low, in order to save the heat of heating the dilute solution and improve the thermal efficiency of the whole device, a heat exchanger is added to the system, so that the high temperature concentrated solution flowing out of the generator can be absorbed by the absorber. The low-temperature dilute solution flowing out of the generator conducts heat exchange to increase the temperature of the dilute solution entering the generator.

The condenser of the existing lithium bromide absorption refrigeration unit uses water as the cooling medium to condense the high temperature and high pressure gaseous refrigerant. The condenser includes a cavity, a heat exchange pipe, and a water pump. When circulating cooling water is used, it also includes a cooling water tower. The working fluid flows in the cavity, and the cooling water flows in the heat exchange pipe. cooling in. The existence of the condenser of the lithium bromide absorption refrigeration unit of the above-mentioned structure is determined as follows: (1) in the prior art, when the lithium bromide working medium flows in the cavity, it is not fully contacted with the heat exchange pipe that flows with cooling water, and the heat exchange efficiency is low; (2) Lithium bromide units have high requirements on tightness, and need to be vacuumed continuously during the working process; (3) In the prior art, the cooling water is communicated with the atmosphere, and the water of the cooling water tower is inevitably lost, and lithium bromide will be limited in water-deficient areas. Use of refrigeration units.

Utility model content

The technical problem to be solved by the utility model is to provide an air-cooled condenser suitable for a lithium bromide absorption refrigeration unit, which can improve the heat exchange efficiency between the refrigeration working medium and the cooling water, improve the sealing performance of the lithium bromide unit, and reduce the water consumption of the cooling water.

In order to solve the above technical problems, the embodiments of the present utility model provide an air-cooled condenser suitable for a lithium bromide absorption refrigeration unit, including a water pump, a sprinkler, a heat exchange pipe, a casing, a fan, and a finned gravity heat pipe group , a closed cavity is formed inside the shell, and the cavity is filled with cooling water;

The heat exchange pipe is arranged inside the casing, the upper end of the heat exchange pipe is provided with a heat exchange pipe inlet extending to the outside of the casing, and the lower end is provided with a heat exchange pipe outlet extending to the outside of the casing, and the heat exchange pipe outlet is located at the outer side of the casing. Below the cooling water level in the cavity, the refrigerant flows into the heat exchange pipe from the inlet of the heat exchange pipe, and flows out from the outlet of the heat exchange pipe after flowing through the heat exchange pipe;

The outer side of the casing is provided with a circulating cooling water pipe, the water inlet end of the circulating cooling water pipe is inserted into the cavity from one side of the casing, the water outlet end is inserted into the cavity from the other side of the casing, and the water outlet end of the circulating cooling water pipe is inserted into the cavity from the other side of the casing. It is connected with the sprayer arranged in the cavity, and the water pump is arranged on the circulating cooling water pipe;

The evaporation section of the finned gravity type heat pipe group is located in the cooling water in the cavity, the condensation section of the finned gravity type heat pipe group is located outside the casing, and the fan is located at the outer side of the finned gravity type heat pipe group. side of the condensation section.

Wherein, the heat exchange pipe is a heat exchange coil, and the heat exchange coil is coiled between a plurality of finned gravity heat pipes of the finned gravity heat pipe group.

Preferably, the sprayer is a disc-shaped sprayer with a plurality of sprayer water outlets distributed thereon.

Wherein, the heat exchange pipe is completely immersed in the cooling water in the cavity.

Further, the lower section of the gravity type heat pipe group with fins is an evaporation section, and the upper section is a condensation section, and the condensation section of the gravity type heat pipe group with fins extends upward from the cavity to the top of the casing.

The beneficial effects of the above-mentioned technical solutions of the present utility model are as follows:

1. In the present utility model, the refrigerating medium flows in the heat exchange pipe, and the cooling water flows in the cavity, which can completely infiltrate the heat exchange pipe, the contact is more complete, and the cooling effect is better.

2. In the present utility model, the refrigerant flowing in the heat exchange pipe is easier to achieve sealing than flowing in the cavity. The cooling water is recycled in a relatively closed space, and the loss is very small, which is suitable for water shortage areas.

3. In the present utility model, the function of the water pump and the sprayer is to distribute the cooling water evenly into the space in the cavity, disturb the temperature field in the space, prevent the water in the space from being overheated locally, and improve the cooling effect. .

4. The utility model does not need a cooling water tower, and directly dissipates the heat in the refrigeration working medium to the environment through the finned gravity heat pipe group and the fan.

Description of drawings

Fig. 1 is the structural representation of the utility model;

FIG. 2 is an enlarged view of the structure of the sprinkler in the utility model.

Description of reference numbers:

1. Water pump; 2. Sprinkler; 21. Sprinkler outlet; 3. Heat exchange pipe; 31, Heat exchange pipe outlet; 32, Heat exchange pipe inlet; 4, Shell; 5, Fan; 6, With fins Sheet gravity type heat pipe group; 7. Circulating cooling water pipe.

Detailed ways

In order to make the technical problems, technical solutions and advantages to be solved by the present invention more clear, the following will be described in detail with reference to the accompanying drawings and specific embodiments.

As shown in FIG. 1 and FIG. 2 , an embodiment of the present invention provides an air-cooled condenser suitable for a lithium bromide absorption refrigeration unit, including a water pump 1, a sprayer 2, a heat exchange pipe 3, a casing 4, and a fan 5 3. Gravity type heat pipe group 6 with fins, a closed cavity is formed inside the casing 4, and the cavity is filled with cooling water.

The heat exchange pipe 3 is arranged inside the casing 4 and is completely immersed in the cooling water in the cavity. The heat exchange pipe outlet 31 on the outside of the casing 4 is located below the cooling water level in the cavity, and the refrigerant flows into the heat exchange pipe 3 from the heat exchange pipe inlet 32, and after flowing through the heat exchange pipe 3, It flows out from the outlet 31 of the heat exchange pipe. That is, for the absorption refrigeration method of lithium bromide aqueous solution, water is the refrigerant. Therefore, water flows in the heat exchange pipeline, flows into the pipeline in the form of steam, and flows out of the pipeline in the form of liquid.

The outer side of the casing 4 is provided with a circulating cooling water pipe 7. The water inlet end of the circulating cooling water pipe 7 is inserted into the cavity from one side of the casing, and the water outlet end is inserted into the cavity from the other side of the casing. The water outlet end of 7 is connected to the sprayer 2 arranged in the cavity. The sprayer 2 is a disc-shaped sprayer with a plurality of sprayer water outlets 21 distributed thereon. The water pump 1 is arranged on the circulating cooling water pipe 7 .

The lower section of the finned gravity heat pipe group 6 is an evaporation section, and the upper section is a condensation section. The condensation section of the finned gravity type heat pipe group 6 extends upward from the cavity to the top of the casing. The evaporation section of the finned gravity type heat pipe group 6 is set in the cooling water in the cavity, and the fan 5 is located on the side of the condensation section of the finned gravity type heat pipe group 6 and is parallel to the direction of the heat pipe group. Preferably, the fan 5 is arranged on the front side of the condensation section of the finned gravity heat pipe group 6 to utilize back pressure.

In this embodiment, the heat exchange pipe 3 is a heat exchange coil, and the heat exchange coil is coiled between a plurality of finned gravity heat pipes of the finned gravity heat pipe group 6 .

The working principle of the present invention is as follows: the relatively closed space formed by the shell 4 in the present invention is filled with cooling water, and the water level of the cooling water does not exceed the outlet 31 of the heat exchange pipe. The cooling water is circulated in the space by the water pump 1, and the water is evenly distributed into the space of the cavity by the sprinkler 2, which disturbs the temperature field in the space and prevents the water in the space from being overheated locally. The refrigerant enters the heat exchange pipe 3 from the inlet 32 of the heat exchange pipe. The heat exchange pipe 3 transfers the heat in the refrigerant to the cooling water in the cavity, and the evaporation section of the finned gravity heat pipe group transfers the heat in the cooling water absorb. The heat is transferred from the evaporation section to the condensation section in the finned gravity heat pipe group, and finally the heat is dissipated to the environment by forced convection through the fan to meet the heat exchange requirements of the refrigeration working medium.

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

Claims (5)

1. a kind of air cooled condenser suitable for lithium bromide absorption refrigerating set, which is characterized in that including water pump (1), spray Device (2), heat exchange pipeline (3), shell (4), blower (5), band fin gravity-type heat pipe group (6) are drenched, is formed inside the shell (4) Closed cavity is filled with cooling water in the cavity；

The heat exchange pipeline (3) is set to the inside of shell (4), and the upper end of the heat exchange pipeline (3), which is equipped with, extends to shell (4) outside The heat exchange pipeline import (32) of side, lower end are equipped with the heat exchange pipeline outlet (31) extended on the outside of shell (4), the heat exchange pipeline The lower section of (31) cooling water level within the cavity is exported, refrigeration working medium flows into heat exchange pipeline (3) from heat exchange pipeline import (32), After heat exchange pipeline flows, flowed out from heat exchange pipeline outlet (31)；

The outside of the shell (4) is equipped with circulating cooling water pipe (7), and the water inlet end of the circulating cooling water pipe (7) is from shell Side is inserted into cavity, water outlet from the other side of shell insertion cavity, and the water outlet of the circulating cooling water pipe (7) with It is connected set on the intracorporal spray thrower of chamber (2), the water pump (1) is set on circulating cooling water pipe (7)；

The evaporator section of the band fin gravity-type heat pipe group (6) is set in the intracorporal cooling water of chamber, the band fin gravity-type heat The condensation segment of nest of tubes (6) is located at the outside of shell (4), and the blower (5) is located at the condensation segment with fin gravity-type heat pipe group (6) Side.

2. the air cooled condenser according to claim 1 suitable for lithium bromide absorption refrigerating set, which is characterized in that The heat exchange pipeline (3) is heat exchange coil, and the heat exchange coil coiling is in the more band fins with fin gravity-type heat pipe group (6) Between gravity-type heat pipe.

3. the air cooled condenser according to claim 1 suitable for lithium bromide absorption refrigerating set, which is characterized in that The spray thrower (2) is disc spray thrower, and multiple spray thrower water outlets (21) are distributed with thereon.

4. the air cooled condenser according to claim 1 or 2 suitable for lithium bromide absorption refrigerating set, feature exist In the heat exchange pipeline (3) is totally submerged in the intracorporal cooling water of chamber.

5. the air cooled condenser according to claim 1 suitable for lithium bromide absorption refrigerating set, which is characterized in that The lower section of the band fin gravity-type heat pipe group (6) is evaporator section, and upper section is condensation segment, the band fin gravity-type heat pipe group (6) condensation segment extends upwardly to the top of shell from cavity.