Lithium bromide liquid drop separation system

Abstract

The utility model belongs to the technical field of waste heat recovery equipment, and discloses a lithium bromide liquid drop separation system. Comprising a liquid drop separator, a liquid guide pipe, a liquid storage plate, a liquid baffle plate, a liquid drop downward flowing hole and a liquid guide groove. The separation system is installed in a lithium bromide absorption type unit, lithium bromide liquid drops carried by refrigerant steam generated in a regenerator of the unit are efficiently separated, the separation effect is high, and the defect that a conventional lithium bromide liquid drop separation system is poor in separation effect is effectively overcome. The system is simple in structure, refrigerant steam carrying lithium bromide liquid drops under different heat flux densities and different flow speeds can be efficiently separated, the operation reliability of a unit is improved, the refrigerant pollution phenomenon is avoided, and the operation and maintenance frequency of the unit is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste heat recovery equipment, and relates to a lithium bromide droplet separation system. Background Art

[0002] In the regenerator and condenser of a lithium bromide absorption unit, the dilute lithium bromide solution in the regenerator boils violently under the action of external heat source heating, generating water vapor as a refrigerant. Since the boiling of the lithium bromide solution is relatively violent, some lithium bromide droplets are carried in the refrigerant vapor. The droplets flow with the refrigerant vapor to the condenser and condense into an aqueous lithium bromide solution. Since the refrigerant water contains lithium bromide droplets, the refrigeration or heating capacity of the lithium bromide unit decreases, and this phenomenon is called refrigerant pollution. The occurrence of the refrigerant pollution phenomenon reduces the operation and maintenance efficiency of the unit and also reduces the stable operation of the product. Especially when the input heat of the regenerator is large, at this time the heat flux density of the refrigerant vapor is large and the gas velocity of the vapor is fast, and the refrigerant pollution phenomenon is extremely likely to occur. Therefore, finding an efficient lithium bromide droplet separation system, installing this efficient separation system on a lithium bromide absorption unit, separating the lithium bromide droplets in the lithium bromide refrigerant vapor through this separation system, and being able to achieve a better separation effect for the vapor with a large heat flux density and a fast flow rate, and finally avoiding the occurrence of the refrigerant pollution phenomenon, has become an urgent problem to be solved. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies in the above background art. To solve the above problems, the utility model provides a lithium bromide droplet separation system, which includes a droplet separator, a liquid guide pipe, a liquid storage plate, a liquid baffle plate, a liquid droplet downward flow hole, a liquid guiding groove, etc. By installing this separation system on a lithium bromide absorption refrigeration unit, the lithium bromide droplets carried in the refrigerant vapor generated in the regenerator of the unit are efficiently separated, and the separated refrigerant vapor goes to the condenser for condensation. The separation preliminarily separates the refrigerant vapor, and the separated lithium bromide droplets enter the liquid storage space formed by the liquid baffle plate and the liquid storage plate, and finally the lithium bromide solution in the liquid storage space is guided back to the regenerator through the liquid pouring pipe. This system has a strong separation effect on the refrigerant vapor and effectively solves the disadvantage of the poor separation effect of the conventional lithium bromide droplet separation system.

[0004] The technical solution adopted by the present utility model to solve its technical problems is as follows: A lithium bromide droplet separation system is provided in a lithium bromide absorption unit, and the lithium bromide droplet separation system is arranged between a condenser and a regenerator; the lithium bromide droplet separation system includes a droplet separator, a liquid guide pipe, a liquid storage plate, a liquid baffle plate, and a droplet downward flow hole; a droplet downward flow hole is provided at the lower part of the droplet separator, a liquid storage plate is arranged below the droplet downward flow hole, the liquid baffle plate is arranged on one side of the bottom of the droplet separator, the front end of the liquid storage plate is arranged on the liquid baffle plate, the liquid storage plate is inclined, and the bottom of the liquid storage plate is connected to the liquid guide pipe, and a liquid guiding groove is arranged on the droplet separator.

[0005] A through hole is opened at the bottom of the liquid storage plate and is communicated with the liquid guide pipe through the through hole.

[0006] The liquid storage plate and the liquid baffle plate together form a liquid storage space, and the liquid guide pipe is arranged below the liquid storage space. The lithium bromide solution in the liquid storage space is discharged.

[0007] The liquid guiding groove guides the liquid film condensed on the plate of the droplet separator to the lower droplet downward flow hole of the droplet separator.

[0008] Preferably, the bottom of the liquid guide pipe is set to a U-shaped structure.

[0009] The droplet separator is composed of several liquid baffle plates, and the liquid baffle plate is any one or more of V-shaped, W-shaped, and Z-shaped.

[0010] The liquid guiding groove is arranged on the plate of the droplet separator.

[0011] A liquid baffle plate is arranged on one side of the bottom of the droplet separator. The liquid baffle plate is arranged on the side adjacent to the condenser.

[0012] The droplet separator, the droplet downward flow hole, and the drainage groove constitute a preliminary separation mechanism for lithium bromide droplets, which blocks the lithium bromide droplets in the refrigerant vapor generated in the regenerator, converges into a lithium bromide solution liquid film, and pours out the liquid film from the droplet separator. The liquid storage plate and the liquid baffle plate together form a liquid storage space, and the lithium bromide solution flowing down from the droplet separator accumulates in the liquid storage space to form a certain liquid level height, and returns to the regenerator through the liquid guide pipe arranged below the liquid storage plate.

[0013] The above-mentioned lithium bromide droplet separation system can not only be applied to single-effect type, single-stage type, and single-section type, but also be suitable for absorption systems such as multi-effect type, multi-stage type, and multi-section type.

[0014] The beneficial effects of the present utility model compared with the prior art are as follows:

[0015] A lithium bromide droplet separation system provided by the present utility model efficiently separates the refrigerant vapor carrying lithium bromide droplets generated in the regenerator through reasonable arrangement of components. The separated refrigerant vapor is condensed in the condenser, ensuring that the condensed refrigerant water in the condenser does not carry lithium bromide droplets, thereby avoiding the occurrence of refrigerant pollution. The system has a simple structure and can be applied to refrigerant vapor with different heat flux densities and different flow rates. It can achieve efficient separation of refrigerant vapor carrying lithium bromide droplets under different heat flux densities and different flow rates. By installing this separation system on a lithium bromide unit, the operating reliability of the unit is improved, the occurrence frequency of refrigerant pollution is reduced or the occurrence of refrigerant pollution is avoided, and the frequency of unit operation and maintenance is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0017] Figure 1 is a schematic structural diagram of the working state of a lithium bromide droplet separation system of the present utility model.

[0018] Figure 2 is a schematic diagram of the liquid pouring groove arranged on the "V"-shaped droplet separator of the present utility model.

[0019] In the figure, 1 is the condenser, 2 is the regenerator, 3 is the droplet separator, 4 is the liquid guide pipe, 5 is the liquid storage plate, 6 is the liquid baffle plate, 7 is the droplet downward flow hole, and 8 is the liquid guiding groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The present utility model will be further described below in conjunction with the accompanying drawings of the specification, but the present utility model is not limited to the following embodiments.

[0021] Embodiment 1

[0022] A lithium bromide droplet separation system, as Figure 1-2 shown, the lithium bromide droplet separation system is arranged in a lithium bromide absorption unit, and the lithium bromide droplet separation system is arranged between the condenser 1 and the regenerator 2; the lithium bromide droplet separation system includes a droplet separator 3, a liquid guide pipe 4, a liquid storage plate 5, a liquid baffle plate 6, and a droplet downward flow hole 7; a droplet downward flow hole 7 is arranged at the lower part of the droplet separator 3, a liquid storage plate 5 is arranged below the droplet downward flow hole 7, the liquid baffle plate 6 is arranged on one side of the bottom of the droplet separator 7, the front end of the liquid storage plate 5 is arranged on the liquid baffle plate 6, the liquid storage plate 5 is inclined, and the bottom of the liquid storage plate is connected to the liquid guide pipe 4, and a liquid guiding groove 8 is arranged on the droplet separator 3.

[0023] A through hole is opened at the bottom of the liquid storage plate 5 and is communicated with the liquid guide pipe 4 through the through hole.

[0024] The liquid storage plate 5 and the liquid baffle 6 together form a liquid storage space, and the liquid guide pipe 4 is arranged below the liquid storage space. The lithium bromide solution in the liquid storage space is discharged.

[0025] The liquid guiding groove 8 guides the liquid film condensed on the plate of the droplet separator 3 into the lower droplet flow hole 7 of the droplet separator 3.

[0026] Preferably, the bottom of the liquid guide pipe 4 is set to a U-shaped structure.

[0027] The droplet separator 3 is composed of a plurality of liquid baffle plates 6, and the liquid baffle plate 6 is any one or more of V-shaped, W-shaped, and Z-shaped.

[0028] The liquid guiding groove 8 is arranged on the plate of the droplet separator 3.

[0029] A liquid baffle plate 6 is arranged on one side of the bottom of the droplet separator 3. The liquid baffle plate 6 is arranged on the side adjacent to the condenser 1.

[0030] During specific operation, in the regenerator 2 of the lithium bromide absorption unit, the lithium bromide solution is heated by an external heat source, changing from a dilute lithium bromide solution to a concentrated lithium bromide solution. The water serving as the refrigerant vapor is heated and evaporated, generating a refrigerant vapor carrying lithium bromide droplets. If the refrigerant vapor carrying lithium bromide droplets is not separated, it will cause the lithium bromide droplets to enter the condenser 1 of the unit, resulting in the occurrence of refrigerant contamination. As described above for the regenerator 2 and the condenser 1, in Figure 1 A lithium bromide droplet separation system, they are arranged horizontally. During the actual arrangement process, the regenerator 2 and the condenser 1 may be arranged vertically. A droplet separator 3 is arranged at the refrigerant vapor flow outlet of the regenerator 2. The droplet separator 3 can be composed of various liquid baffle plates such as "V"-shaped, "W"-shaped, and "Z"-shaped, or may be composed of a mixture of multiple liquid baffle plates. The material of the droplet separator 3 can be carbon steel, stainless steel, etc. according to the different flowing media. The refrigerant vapor flows in the gap between the plates of the liquid baffle plate. Due to the inertial force of the lithium bromide droplets carried in the refrigerant vapor and the blocking effect of the droplet separator 3, the lithium bromide droplets impact on the plates of the droplet separator 3, and the separated lithium bromide droplets gather on the plates of the liquid baffle plate of the droplet separator 3. The continuously gathering droplets finally converge into a lithium bromide solution liquid film. As Figure 2As shown in the figure, taking the "V"-type droplet separator as an example, a liquid guiding groove 8 is arranged in the plate of the "V"-type droplet separator 3. The liquid guiding groove can be fixed on the half plate of the droplet separator 3 by welding or snap connection. The liquid guiding groove 8 guides the lithium bromide solution film blocked on the plate to the lower part of the baffle plate, and flows down through the droplet downward flow holes 7 arranged at the bottom of the droplet separator 3. After the liquid film flows down, it enters a liquid storage space jointly formed by the liquid storage plate 5 and the baffle plate 6 which are connected to each other. The liquid storage plate 5 has a certain slope to facilitate the flow of lithium bromide droplets. The refrigerant vapor separated by the droplet separator 3 flows into the condenser 1 and is cooled in the refrigerant vapor, and condensed water is generated by condensation. The lithium bromide solution flowing down from the droplet separator 3 accumulates in the liquid storage space to form a certain liquid level height, and returns to the regenerator 2 through the liquid guiding pipe 4 arranged at the lower part of the liquid storage plate 5 to ensure the stability of the system flow. The liquid guiding pipe can be in the form of a U-shaped pipe to ensure that there is a certain amount of lithium bromide solution in the pipe, that is, there is a liquid seal. The existence of the liquid seal prevents the refrigerant vapor in the regenerator from mixing into the liquid storage space, prevents the lithium bromide solution in the liquid storage space from fluctuating due to the action of gas fluctuations and returning to the droplet separator 3, and affects the separation efficiency of the droplet separator 3. The baffle plate 6 stands between the regenerator 2 and the condenser 1. The baffle plate 6 blocks the lithium bromide solution returning to the regenerator 2 from the liquid guiding pipe 4 in the regenerator 2, so that the lithium bromide solution no longer returns to the condenser 1, and avoids the secondary occurrence of the refrigerant pollution phenomenon.

[0031] A lithium bromide droplet separation system described in the present utility model. It efficiently separates the refrigerant vapor carrying lithium bromide droplets generated by the regenerator in a lithium bromide absorption unit. Through the reasonable arrangement of the system components, this system has a strong separation effect on lithium bromide droplets, effectively solving the disadvantage of poor separation effect of the conventional lithium bromide droplet separation system. The system has a simple structure and can achieve a good effect of capturing lithium bromide droplets for refrigerant vapor with different heat flux densities and different flow velocities. By installing this separation system on a lithium bromide unit, the reliability of the unit is improved, the occurrence of refrigerant pollution phenomenon is avoided, and the frequency of unit operation and maintenance is reduced.

[0032] Although the present utility model has been described in detail with general descriptions and specific embodiments above, based on the present utility model, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present utility model all fall within the scope of protection required by the present utility model.

Claims

1. A lithium bromide droplet separation system, characterized in that lithium bromide The droplet separation system comprises a droplet separator (3), a liquid guide tube (4), a liquid storage plate (5), a liquid baffle plate (6), and a droplet downflow hole (7); the droplet downflow hole (7) is arranged at the lower part of the droplet separator (3), the liquid storage plate (5) is arranged below the droplet downflow hole (7), the liquid baffle plate (6) is arranged at one side of the bottom of the droplet separator (3), the front end of the liquid storage plate (5) is arranged on the liquid baffle plate (6), the liquid storage plate (5) is arranged obliquely, and the bottom of the liquid storage plate is connected to the liquid guide tube (4), and a liquid guide groove (8) is arranged on the droplet separator (3).

2. A lithium bromide droplet separation system as claimed in claim 1, characterized in that: The lithium bromide droplet separation system is arranged in the lithium bromide absorption unit, and the lithium bromide droplet separation system is arranged between the condenser (1) and the regenerator (2).

3. A lithium bromide droplet separation system as claimed in claim 1, characterized in that: A through hole is provided at the bottom of the liquid storage plate (5), which is connected to the liquid guide tube (4) through the through hole.

4. A lithium bromide droplet separation system as claimed in claim 1, characterized in that: The liquid storage plate (5) and the liquid baffle plate (6) together form a liquid storage space, and the liquid guide tube (4) is arranged under the liquid storage space.

5. A lithium bromide droplet separation system as claimed in claim 1, characterized in that: The bottom of the liquid guiding tube (4) is a U-shaped structure.

6. A lithium bromide droplet separation system as claimed in claim 1, characterized in that: The droplet separator (3) is composed of a plurality of liquid baffles (6), and the liquid baffles (6) are any one of V-shaped, W-shaped, and Z-shaped, or more than two of them.

7. A lithium bromide droplet separation system as claimed in claim 1, characterized in that: The liquid inlet groove (8) is arranged on the plate of the droplet separator (3).

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