CN216409353U - Second-class lithium bromide absorption heat pump unit for preparing steam in variable-effect two-stage mode - Google Patents
Second-class lithium bromide absorption heat pump unit for preparing steam in variable-effect two-stage mode Download PDFInfo
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- CN216409353U CN216409353U CN202122905259.9U CN202122905259U CN216409353U CN 216409353 U CN216409353 U CN 216409353U CN 202122905259 U CN202122905259 U CN 202122905259U CN 216409353 U CN216409353 U CN 216409353U
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Abstract
The utility model relates to a second-class lithium bromide absorption heat pump unit for preparing steam in a variable-effect two-stage mode, and belongs to the technical field of refrigeration equipment. The system is provided with a high-temperature evaporator, a refrigerant water heater, a vapor-liquid separator and a water replenishing preheater, wherein a tube bundle of the high-temperature evaporator is divided into a high-temperature evaporator waste heat water tube bundle and a high-temperature evaporator internal circulation hot water tube bundle in the high-temperature evaporator; the residual hot water enters a residual hot water pipe bundle of the high-temperature evaporator and then is divided into two paths, wherein a small part of residual hot water enters the refrigerant water heater, and a large part of residual hot water enters the low-temperature evaporator, the high-temperature generator and the low-temperature generator; the water supplementing preheater enables water supplementing and internal circulation hot water to exchange heat and rise in temperature and then enter the vapor-liquid separator. The utility model can prepare higher-grade steam under the condition of poor external working condition parameter conditions, and can realize the automatic change of partial intermediate-temperature waste heat between two-stage utilization and single-stage utilization when the external working condition parameter conditions change, thereby improving the utilization rate and the conversion rate of the intermediate-temperature waste heat and saving energy.
Description
Technical Field
The utility model relates to a second-class lithium bromide absorption heat pump unit for preparing steam in a variable-effect two-stage mode, and belongs to the technical field of refrigeration equipment.
Background
In the prior art, in areas where high-grade steam is needed in production process and life and medium-temperature waste heat exists, under the condition of providing cooling water, a second lithium bromide absorption heat pump unit is adopted to recover medium-temperature waste heat and prepare high-grade steam, so that the consumption of a large amount of energy can be saved by 100%, the comprehensive utilization of the energy is realized, a large amount of application is obtained in recent years, and better economic and social benefits are obtained.
However, in practical applications, sometimes the external system provides poor parameter conditions, the intermediate temperature waste heat temperature is low, and the grade of steam to be produced is high, so that the common second-class lithium bromide absorption heat pump unit cannot meet the requirements. How to overcome the poor parameter condition, improve the comprehensive performance coefficient of the heat pump unit, recycle more waste heat and save energy becomes one of the important subjects of the current research.
Therefore, in order to solve the above background problems, it is urgent to develop a second type lithium bromide absorption heat pump unit for producing steam in variable efficiency two-stage type.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems in the background, and provides a variable-efficiency two-stage type second-class lithium bromide absorption heat pump unit for preparing steam, which has a reasonable structure, can prepare higher-grade steam under the condition of poor external working condition parameter conditions, can realize automatic efficiency change of partial intermediate-temperature waste heat between two-stage utilization and single-stage utilization when the external working condition parameter conditions change, improves the utilization rate of the intermediate-temperature waste heat, improves the conversion rate of the intermediate-temperature waste heat, saves energy and is simple to operate.
The purpose of the utility model is realized as follows: a second-class lithium bromide absorption heat pump unit for preparing steam in a variable-effect two-stage mode comprises a high-temperature absorber, a high-temperature solution heat exchanger, a high-temperature condenser, a high-temperature generator, a low-temperature condenser, a low-temperature solution heat exchanger, a refrigerant water heater, a low-temperature absorber, a low-temperature evaporator, a high-temperature evaporator and a water supplementing pipeline, wherein the high-temperature evaporator is internally provided with a high-temperature evaporator tube bundle which is divided into a high-temperature evaporator waste heat water tube bundle and a high-temperature evaporator internal circulation hot water tube bundle; the high-temperature evaporator waste heat water pipe bundle and the high-temperature evaporator internal circulation hot water pipe bundle are arranged up and down or left and right;
a water supplementing preheater is arranged on the water supplementing pipeline, a connecting pipeline on one side penetrates out after passing through the low-temperature absorber, and a connecting pipeline on the other side is connected with the vapor-liquid separator; the water supplement exchanges heat with the internal circulation hot water from the low-temperature absorber, and the water supplement enters the vapor-liquid separator after being heated.
The bottom of the vapor-liquid separator is provided with high-temperature hot water and is connected with a high-temperature absorber through a hot water pump, the high-temperature absorber is connected with the vapor-liquid separator through a pipeline, and the top of the vapor-liquid separator is provided with a steam outlet.
And a pipeline at the outlet of the condenser refrigerant pump is provided with a refrigerant water heater, so that the condenser refrigerant water exchanges heat with waste heat water, and the condenser refrigerant water enters the low-temperature evaporator after being heated.
The high-temperature evaporator residual heat water pipe bundle is connected with medium-temperature residual heat water of an external system;
medium-temperature waste hot water of an external system enters a waste hot water tube bundle of a high-temperature evaporator and is divided into two paths, and one path of the medium-temperature waste hot water passes through a low-temperature evaporator, a high-temperature generator and a low-temperature generator in sequence and then reaches a waste hot water outlet; the other path of the water passes through a refrigerant water heater and then reaches a waste heat water outlet.
Compared with the prior art, the utility model has the following advantages:
the second type of lithium bromide absorption heat pump unit for preparing steam in variable-effect two-stage type can realize variable-effect operation through the brand new structure and flow: when the working condition is poor, the utilization of the waste heat source is mainly a two-stage type two-class heat pump mode, when the working condition is good, the utilization of partial waste heat realizes the single-stage type two-class heat pump mode, and the heat required by the water replenishing and temperature raising part is also prepared in the waste heat single-stage mode.
Drawings
Fig. 1 is a schematic view of the overall structure of a second type of lithium bromide absorption heat pump unit for variable-efficiency two-stage steam production according to the present invention.
Wherein: the system comprises a high-temperature evaporator waste heat water pipe bundle 1, a high-temperature evaporator internal circulation hot water pipe bundle 2, a high-temperature absorber 3, a high-temperature evaporator refrigerant pump 4, a low-temperature evaporator refrigerant pump 5, a high-temperature solution heat exchanger 6, a high-temperature condenser 7, a high-temperature generator 8, a low-temperature generator 9, a high-temperature solution pump 10, a low-temperature solution pump 11, a condenser refrigerant pump 12, a low-temperature condenser 13, a low-temperature solution heat exchanger 14, a refrigerant lifting pump 15, an internal circulation hot water pump 16, a refrigerant water heater 17, a low-temperature absorber 18, a low-temperature evaporator 19, a high-temperature evaporator 20, a waste hot water inlet 21, a water supplementing inlet 22, a steam outlet 23, a cooling water inlet 24, a cooling water outlet 25, a waste hot water outlet 26, internal circulation hot water 27, a steam-liquid separator 28, a hot water pump 29 and a water supplementing 30.
Detailed Description
The utility model is described below with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1, a second type of lithium bromide absorption heat pump unit for variable-effect two-stage steam production comprises a high-temperature absorber 3, a high-temperature solution heat exchanger 6, a high-temperature condenser 7, a high-temperature generator 8, a low-temperature generator 9, a low-temperature condenser 13, a low-temperature solution heat exchanger 14, a refrigerant water heater 17, a low-temperature absorber 18, a low-temperature evaporator 19, a high-temperature evaporator 20 and a water supplementing pipeline, wherein the high-temperature evaporator 20 is internally divided into a high-temperature evaporator residual heat water pipe bundle 1 and a high-temperature evaporator internal circulation heat water pipe bundle 2; the high-temperature evaporator residual heat water pipe bundle 1 and the high-temperature evaporator internal circulation hot water pipe bundle 2 are arranged up and down or left and right;
a water supplementing preheater 30 is arranged on the water supplementing pipeline, a connecting pipeline on one side of the water supplementing preheater 30 penetrates out after passing through the low-temperature absorber 18, and a connecting pipeline on the other side is connected with the vapor-liquid separator 28; the water supplement exchanges heat with the internal circulation hot water from the low-temperature absorber, and the water supplement enters the vapor-liquid separator after being heated.
The bottom of the vapor-liquid separator 28 is provided with high-temperature hot water and is connected with the high-temperature absorber 3 through a hot water pump 29, the high-temperature absorber 3 is connected with the vapor-liquid separator 28 through a pipeline, and the top of the vapor-liquid separator 28 is provided with a steam outlet 23.
The bottom of the high-temperature absorber 3 is connected with a high-temperature generator 8 through a pipeline, and a high-temperature solution heat exchanger 6 is arranged between the high-temperature absorber 3 and the high-temperature generator 8;
a high-temperature solution pump 10 is arranged at an outlet at the bottom of the high-temperature generator 8, the high-temperature solution pump 10 is connected with the high-temperature solution heat exchanger 6 through a pipeline and is connected with the high-temperature absorber 3 through a pipeline, and the tail part of the high-temperature solution pump is arranged as a spraying structure and is positioned at one side in the high-temperature evaporator 20;
a high-temperature evaporator refrigerant pump 4 is arranged at the bottom of the liquid bag at the other side of the high-temperature evaporator 20, and a high-temperature evaporator shower plate is arranged at the rear end of the high-temperature evaporator refrigerant pump 4 through a pipeline;
the bottom of the low-temperature absorber 18 is connected with a low-temperature generator 9 through a pipeline, and a low-temperature solution heat exchanger 14 is arranged between the low-temperature absorber 18 and the low-temperature generator 9;
a low-temperature solution pump 11 is arranged at an outlet at the bottom of the low-temperature generator 9, the low-temperature solution pump 11 is connected with a low-temperature solution heat exchanger 14 through a pipeline and is connected with a low-temperature absorber 18 through a pipeline, and the tail part of the low-temperature solution pump is arranged as a spraying structure and is positioned on one side in a low-temperature evaporator 19;
a low-temperature evaporator refrigerant pump 5 is arranged at the bottom of the liquid bag at the other side of the low-temperature evaporator 19, and a low-temperature evaporator shower plate is arranged at the rear end of the low-temperature evaporator refrigerant pump 5 through a pipeline;
the refrigerant water condensed at the bottoms of the high-temperature condenser 7 and the low-temperature condenser 13 is converged through a pipeline, a condenser refrigerant pump 12 is arranged, and the condenser refrigerant pump 12 is connected with a low-temperature evaporator 19 through a pipeline;
the bottom of the low-temperature evaporator 19 is also connected with a high-temperature evaporator 20 through a refrigerant lifting pump 15.
A refrigerant water heater 17 is arranged on a pipeline at the outlet of the condenser refrigerant pump 12, and the rear end of the refrigerant water heater 17 enters the low-temperature evaporator 19 through the pipeline; the refrigerant water of the condenser exchanges heat with the residual heat water, and the refrigerant water of the condenser enters the low-temperature evaporator after being heated.
The high-temperature evaporator waste heat water pipe bundle 1 is connected with medium-temperature waste heat water of an external system;
in this embodiment, the intermediate-temperature residual hot water of the external system enters the high-temperature evaporator residual heat water tube bundle 1 and then is divided into two paths, one path of the intermediate-temperature residual hot water passes through the low-temperature evaporator 19, the high-temperature generator 8 and the low-temperature generator 9 in sequence and then reaches the residual hot water outlet 26; the other path passes through the refrigerant water heater 17 and then to the residual heat water outlet 26.
In this embodiment, the high-temperature hot water at the bottom of the vapor-liquid separator 28 is lifted by the hot water pump 29 to enter the high-temperature absorber 3 to absorb heat, and the high-temperature hot water is changed into a vapor-liquid mixture to enter the vapor-liquid separator 28 to emit high-grade steam to enter the user system through the steam outlet 23.
In the present embodiment, the internal circulation hot water 27 is heated by the low temperature absorber 18, enters the internal circulation hot water tube bundle 2 of the high temperature evaporator for cooling, and enters the low temperature absorber 18 for heating by the internal circulation hot water pump 16. The cooling water enters the high-temperature condenser 7 and the low-temperature condenser 13 to carry heat out of the unit.
In this embodiment, the second type of lithium bromide absorption heat pump unit for variable-efficiency two-stage steam production according to the present invention has the following working principle:
the dilute solution at the bottom of the high-temperature absorber 3 is cooled by a high-temperature solution heat exchanger 6, enters a high-temperature generator 8 and is concentrated into a concentrated solution, the generated refrigerant steam is condensed into refrigerant water by a high-temperature condenser 7, the concentrated solution at the bottom of the high-temperature generator 8 is lifted by a high-temperature solution pump 10 and is heated by the high-temperature solution heat exchanger 6, then enters the high-temperature absorber 3 for spraying, the high-temperature refrigerant steam evaporated from a high-temperature evaporator 20 is absorbed and becomes the dilute solution, the refrigerant water in a liquid bag of the high-temperature evaporator 20 is pumped into a high-temperature evaporator spraying plate by a high-temperature evaporator refrigerant pump 4, and is uniformly sprayed to the surfaces of a high-temperature evaporator residual heat water pipe bundle 1 and a high-temperature evaporator internal circulation hot water pipe bundle 2 to absorb heat and evaporate into the high-temperature refrigerant steam;
the dilute solution at the bottom of the low-temperature absorber 18 is cooled by a low-temperature solution heat exchanger 14, enters a low-temperature generator 9 and is concentrated into a concentrated solution, the generated refrigerant steam is condensed into refrigerant water by a low-temperature condenser 13, the concentrated solution at the bottom of the low-temperature generator 9 is lifted by a low-temperature solution pump 11, is heated by the low-temperature solution heat exchanger 14 and then enters a low-temperature absorber 18 for spraying, high-temperature refrigerant steam evaporated from a low-temperature evaporator 19 is absorbed to be changed into the dilute solution, the refrigerant water in a liquid bag of the low-temperature evaporator 19 is pumped into a low-temperature evaporator spraying plate by a low-temperature evaporator refrigerant pump 5, and is uniformly sprayed to the surface of a tube bundle of the low-temperature evaporator to absorb heat and evaporate into the high-temperature refrigerant steam;
the high-temperature condenser 7 and the low-temperature condenser 13 condense the refrigerant water to be combined together, and the refrigerant water is lifted by the condenser refrigerant pump 12, heated by the refrigerant water heater 17 and then enters the low-temperature evaporator 19, and a part of the refrigerant water is pumped into the high-temperature evaporator 20 by the refrigerant lifting pump 15; and the process is continuously circulated.
The above is only a specific application example of the present invention, and the protection scope of the present invention is not limited in any way. All the technical solutions formed by equivalent transformation or equivalent replacement fall within the protection scope of the present invention.
Claims (4)
1. The utility model provides a second type lithium bromide absorption heat pump unit of steam is prepared to variable effect two-stage type, includes high temperature absorber (3), high temperature solution heat exchanger (6), high temperature condenser (7), high temperature generator (8), low temperature generator (9), low temperature condenser (13), low temperature solution heat exchanger (14), refrigerant water heater (17), low temperature absorber (18) and low temperature evaporimeter (19), its characterized in that: a high-temperature evaporator (20) and a water replenishing pipeline are also arranged;
the high-temperature evaporator (20) is internally divided into a high-temperature evaporator waste heat water pipe bundle (1) and a high-temperature evaporator internal circulation hot water pipe bundle (2); the high-temperature evaporator waste heat water pipe bundle (1) and the high-temperature evaporator internal circulation hot water pipe bundle (2) are arranged up and down or left and right;
the water replenishing pipeline is provided with a water replenishing preheater (30), a connecting pipeline on one side of the water replenishing preheater (30) penetrates out after passing through the low-temperature absorber (18), and a connecting pipeline on the other side of the water replenishing preheater (30) is connected with the vapor-liquid separator (28).
2. The second type of lithium bromide absorption heat pump unit for variable-efficiency two-stage steam production according to claim 1, wherein: the bottom of the vapor-liquid separator (28) is provided with high-temperature hot water and is connected with the high-temperature absorber (3) through a hot water pump (29), the high-temperature absorber (3) is connected with the vapor-liquid separator (28) through a pipeline, and the top of the vapor-liquid separator (28) is provided with a steam outlet (23).
3. The second type of lithium bromide absorption heat pump unit for variable-efficiency two-stage steam production according to claim 1, wherein: a refrigerant water heater (17) is arranged on an outlet pipeline of the condenser refrigerant pump (12), and the rear end of the refrigerant water heater (17) enters the low-temperature evaporator (19) through a pipeline.
4. The second type of lithium bromide absorption heat pump unit for variable-efficiency two-stage steam production according to claim 1, wherein: the high-temperature evaporator waste heat water pipe bundle (1) is connected with medium-temperature waste heat water of an external system;
medium-temperature waste hot water of an external system enters a high-temperature evaporator waste heat water pipe bundle (1) and then is divided into two paths, and one path of the medium-temperature waste hot water passes through a low-temperature evaporator (19), a high-temperature generator (8) and a low-temperature generator (9) in sequence and then is led to a waste hot water outlet (26); the other path of the water passes through a refrigerant water heater (17) and then reaches a waste heat water outlet (26).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122905259.9U CN216409353U (en) | 2021-11-25 | 2021-11-25 | Second-class lithium bromide absorption heat pump unit for preparing steam in variable-effect two-stage mode |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122905259.9U CN216409353U (en) | 2021-11-25 | 2021-11-25 | Second-class lithium bromide absorption heat pump unit for preparing steam in variable-effect two-stage mode |
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| CN216409353U true CN216409353U (en) | 2022-04-29 |
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| CN202122905259.9U Active CN216409353U (en) | 2021-11-25 | 2021-11-25 | Second-class lithium bromide absorption heat pump unit for preparing steam in variable-effect two-stage mode |
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- 2021-11-25 CN CN202122905259.9U patent/CN216409353U/en active Active
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