CN115654769A - Flue gas waste heat recovery system - Google Patents
Flue gas waste heat recovery system Download PDFInfo
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- CN115654769A CN115654769A CN202211108342.6A CN202211108342A CN115654769A CN 115654769 A CN115654769 A CN 115654769A CN 202211108342 A CN202211108342 A CN 202211108342A CN 115654769 A CN115654769 A CN 115654769A
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Abstract
The invention relates to the technical field of heat energy recovery, in particular to a flue gas waste heat recovery system, which comprises: the generator is provided with a first flue gas inlet, a first flue gas outlet and a first refrigerant steam outlet; the first flue gas inlet is connected with a flue gas collecting device; the condenser is provided with a first refrigerant steam inlet and a first refrigerant outlet, and the evaporator is provided with a first refrigerant inlet, a second refrigerant steam outlet, a chilled water inlet and a chilled water outlet; the first refrigerant inlet is connected with the first refrigerant outlet; a cold source user is connected between the chilled water inlet and the chilled water outlet; the method comprises the steps that the waste heat of the flue gas is utilized to heat a refrigerant, the refrigerant is evaporated and enters a condenser to be condensed to form a low-temperature liquid refrigerant, then the low-temperature liquid refrigerant is sent to an evaporator, and low-temperature chilled water is obtained through evaporation and heat absorption of the refrigerant; the flue gas waste heat recovery system works in a cooling mode, effectively utilizes flue gas waste heat and obtains chilled water.
Description
Technical Field
The invention relates to the technical field of heat energy recovery, in particular to a flue gas waste heat recovery system.
Background
At present, in the industrial fields of power and the like, the exhaust smoke of a waste heat boiler still has high temperature, and if the part of heat is directly discharged into the air, huge energy loss is caused, and the energy utilization rate is reduced.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defect of huge energy loss caused by the direct discharge of the exhaust smoke of the waste heat boiler into the air in the prior art, and based on the above situation, it is necessary to develop a system for effectively recovering the heat of the exhaust smoke of the waste heat boiler.
In order to achieve the above object, the present invention provides a flue gas waste heat recovery system, comprising:
the generator is provided with a cavity for storing a refrigerant, and is provided with a first flue gas inlet, a first flue gas outlet, a first refrigerant steam outlet, a first absorbent inlet and a second absorbent outlet; the first flue gas inlet is communicated with the first flue gas outlet; the first flue gas inlet is connected with a flue gas collecting device;
the condenser is provided with a first refrigerant vapor inlet and a first refrigerant outlet, and the first refrigerant vapor inlet is communicated with the first refrigerant outlet;
the evaporator is provided with a first refrigerant inlet, a second refrigerant steam outlet, a chilled water inlet and a chilled water outlet; the first refrigerant inlet is communicated with the second refrigerant steam outlet, and the chilled water inlet is communicated with the chilled water outlet; the first refrigerant inlet is connected with the first refrigerant outlet; a cold source user is connected between the chilled water inlet and the chilled water outlet;
the first heat exchanger is provided with a second low-temperature side inlet, a second low-temperature side outlet, a second high-temperature side inlet and a second high-temperature side outlet; the second low-temperature side inlet is communicated with the second low-temperature side outlet, and the second high-temperature side inlet is communicated with the second high-temperature side outlet;
the absorber is provided with a second refrigerant vapor inlet, a second absorbent inlet and a first absorbent outlet;
the second low-temperature side inlet is connected with the first absorbent outlet, the second low-temperature side outlet is connected with the first absorbent inlet, the second high-temperature side inlet is connected with the second absorbent outlet, and the second high-temperature side outlet is connected with the second absorbent inlet; the second refrigerant vapor inlet is connected to the second refrigerant vapor outlet.
Optionally, the absorber is further provided with a first user water inlet and a first user water outlet; the first user water inlet is communicated with the first user water outlet;
the condenser is also provided with a second user water inlet and a second user water outlet; the second user water inlet is communicated with the second user water outlet; the first user water inlet is connected with the second user water outlet, and the first user water outlet is connected with the second user water inlet;
and a heat source user is arranged on a pipeline connecting the first user water inlet and the second user water outlet or a pipeline connecting the first user water outlet and the second user water inlet.
Optionally, the method further comprises:
the second heat exchanger is provided with a first low-temperature side inlet, a first low-temperature side outlet, a first high-temperature side inlet and a first high-temperature side outlet; the first low-temperature side inlet is connected with the flue gas collecting device, and the first low-temperature side outlet is connected with the first flue gas inlet; the first low-temperature side inlet is communicated with the first low-temperature side outlet;
the condenser is also provided with a first cooling water inlet and a first cooling water outlet, the first cooling water inlet is communicated with the first cooling water outlet, and the first cooling water inlet is connected with the first high-temperature side inlet;
the absorber is also provided with a second cooling water inlet and a second cooling water outlet, the second cooling water inlet is communicated with the second cooling water outlet, the second cooling water inlet is connected with the first high-temperature side outlet, and the second cooling water outlet is connected with the first cooling water inlet.
Optionally, the evaporator is further provided with a second flue gas inlet and a second flue gas outlet; the second flue gas inlet is communicated with the second flue gas outlet;
the second flue gas inlet is connected with the first flue gas outlet.
Optionally, the method further comprises:
and two ends of the first pump are respectively connected with a second refrigerant outlet and a second refrigerant inlet which are arranged on the evaporator.
Optionally, the method further comprises:
a throttle valve disposed between the first refrigerant inlet and the first refrigerant outlet.
Optionally, the method further comprises:
and a second pump disposed between the second low-temperature-side inlet and the first absorbent outlet.
Optionally, the refrigerant is water, the first absorbent is a lithium bromide solution having a first concentration, the second absorbent is a lithium bromide solution having a second concentration, and the first concentration is less than the second concentration.
Optionally, the cold source user comprises: cold users and refrigeration equipment;
the heat source user includes: thermal users and thermal processing equipment.
Compared with the prior art, the technical scheme of the invention has the following advantages:
1. the invention provides a flue gas waste heat recovery system, which comprises: the generator is provided with a cavity for storing a refrigerant, a first flue gas inlet, a first flue gas outlet, a first refrigerant steam outlet, a first absorbent inlet and a second absorbent outlet; the first flue gas inlet is communicated with the first flue gas outlet; the first flue gas inlet is connected with a flue gas collecting device; the condenser is provided with a first refrigerant vapor inlet and a first refrigerant outlet, and the first refrigerant vapor inlet is communicated with the first refrigerant outlet; the evaporator is provided with a first refrigerant inlet, a second refrigerant steam outlet, a chilled water inlet and a chilled water outlet; the first refrigerant inlet is communicated with the second refrigerant steam outlet, and the chilled water inlet is communicated with the chilled water outlet; the first refrigerant inlet is connected with the first refrigerant outlet; a cold source user is connected between the chilled water inlet and the chilled water outlet; the first heat exchanger is provided with a second low-temperature side inlet, a second low-temperature side outlet, a second high-temperature side inlet and a second high-temperature side outlet; the second low-temperature side inlet is communicated with the second low-temperature side outlet, and the second high-temperature side inlet is communicated with the second high-temperature side outlet; the absorber is provided with a second refrigerant vapor inlet, a second absorbent inlet and a first absorbent outlet; the second low-temperature side inlet is connected with the first absorbent outlet, the second low-temperature side outlet is connected with the first absorbent inlet, the second high-temperature side inlet is connected with the second absorbent outlet, and the second high-temperature side outlet is connected with the second absorbent inlet; the second refrigerant vapor inlet is connected to the second refrigerant vapor outlet; according to the technical scheme, the refrigerant is heated by utilizing the waste heat of the flue gas, the refrigerant is evaporated and enters the condenser to be condensed to form a low-temperature liquid refrigerant, and then the low-temperature liquid refrigerant is sent into the evaporator to absorb heat through the evaporation of the refrigerant, so that low-temperature chilled water is obtained; the evaporated refrigerant enters an absorber and sequentially circulates to the heat exchanger and the generator along with the second absorbent to complete the circulation of the refrigerant; the flue gas waste heat recovery system works in a refrigeration mode, effectively utilizes the waste heat of the flue gas, and obtains chilled water required by cold source users.
2. The absorber is also provided with a first user water inlet and a first user water outlet; the first user water inlet is communicated with the first user water outlet; the condenser is also provided with a second user water inlet and a second user water outlet; the second user water inlet is communicated with the second user water outlet; the first user water inlet is connected with the second user water outlet, and the first user water outlet is connected with the second user water inlet; a heat source user is arranged on a pipeline connecting the first user water inlet and the second user water outlet or a pipeline connecting the first user water outlet and the second user water inlet; this application technical scheme make full use of tail gas waste heat, refrigerant are in exothermic state in condenser and absorber, heat user's water, and user's water retrieves two sections heats through absorber and condenser, and flue gas waste heat recovery system also can work under the heating mode, has obtained the required hot water of heat source user, effectively improves flue gas waste heat utilization ratio.
3. The invention provides a flue gas waste heat recovery system, which further comprises: the second heat exchanger is provided with a first low-temperature side inlet, a first low-temperature side outlet, a first high-temperature side inlet and a first high-temperature side outlet; the first low-temperature side inlet is connected with the flue gas collecting device, and the first low-temperature side outlet is connected with the first flue gas inlet; the first low-temperature side inlet is communicated with the first low-temperature side outlet; the condenser is also provided with a first cooling water inlet and a first cooling water outlet, the first cooling water inlet is communicated with the first cooling water outlet, and the first cooling water inlet is connected with the first high-temperature side inlet; the absorber is also provided with a second cooling water inlet and a second cooling water outlet, the second cooling water inlet is communicated with the second cooling water outlet, the second cooling water inlet is connected with the first high-temperature side outlet, and the second cooling water outlet is connected with the first cooling water inlet; according to the technical scheme, the heat recovered by the cooling water in the absorber and the condenser is used for heating the low-temperature flue gas, so that the quality of a driving heat source can be improved, and the refrigeration efficiency is improved; meanwhile, the heat recovered by the cooling water is recycled, so that the installation cost of cooling equipment such as a cooling tower in a conventional absorption refrigerator can be reduced.
4. The evaporator is also provided with a second flue gas inlet and a second flue gas outlet; the second flue gas inlet is communicated with the second flue gas outlet; the second flue gas inlet is connected with the first flue gas outlet; this application technical scheme is with twice exothermic of flue gas through generator and evaporimeter, can effectively reduce flue gas exhaust temperature, reduces the environmental damage.
5. The invention provides a flue gas waste heat recovery system, which further comprises: the two ends of the first pump are respectively connected with a second refrigerant outlet and a second refrigerant inlet which are arranged on the evaporator; the liquid refrigerant is sucked out through the first pump and then sprayed onto the pipeline of the chilled water again in the refrigeration mode, so that the low temperature of the liquid refrigerant is fully utilized, the temperature of the chilled water is reduced, the evaporation of the liquid refrigerant is accelerated, and the cooling of the chilled water is accelerated; in the heating mode, the liquid refrigerant is sprayed onto the flue gas pipeline again, so that the waste heat of the flue gas is fully utilized, the evaporation of the liquid refrigerant is accelerated, and the operating efficiency of the flue gas waste heat recovery system is improved.
6. The invention provides a flue gas waste heat recovery system, which further comprises: a throttle valve disposed between the first refrigerant inlet and the first refrigerant outlet; according to the technical scheme, the throttle valve is arranged, so that the flow of the refrigerant is adjusted, a high-pressure area and a low-pressure area are formed, and the refrigeration cycle is ensured.
7. The invention provides a flue gas waste heat recovery system, which further comprises: a second pump disposed between the second low temperature side inlet and the first absorbent outlet; this application is through setting up the second pump, and the flow of first absorbent is accelerated to and the heat transfer process between first absorbent and the second absorbent, improve whole flue gas waste heat recovery system's operating efficiency.
8. The refrigerant is water, the first absorbent is a lithium bromide solution with a first concentration, the second absorbent is a lithium bromide solution with a second concentration, and the first concentration is less than the second concentration; the technical scheme of the application specifically limits the refrigerant to be water, so that the cost is low, and a good refrigeration effect can be obtained; the type and concentration of the first absorbent and the second absorbent are specifically limited, so that normal operation of a refrigerant cycle and full utilization of heat of the waste heat of the flue gas are ensured.
9. The user of the cold source of the invention comprises: cold users and refrigeration equipment; the heat source user includes: thermal users and thermal processing equipment; this application technical scheme is through injecing specific cold source user and heat source user, this application flue gas waste heat recovery system's refrigeration mode and heating mode not only are used for the user, can be used for the refrigeration and the heating of equipment moreover.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic connection structure diagram of a flue gas waste heat recovery system in a refrigeration mode according to an embodiment of the present invention;
fig. 2 is a schematic connection structure diagram of the flue gas waste heat recovery system in the heating mode according to the embodiment of the present invention.
Description of the reference numerals:
1. a generator; 2. a condenser; 3. an evaporator; 4. an absorber; 5. a first heat exchanger; 6. a flue gas collection device; 7. a second heat exchanger; 8. a throttle valve; 9. a first pump; 10. a second pump; 11. a cold source user; 12. a heat source user.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.
Furthermore, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The embodiment of the flue gas waste heat recovery system shown in fig. 1 to 2 is used for recovering waste heat of the flue gas collecting device 6, and includes: the second heat exchanger 7, the generator 1, the condenser 2, the throttle valve 8, the evaporator 3 and the absorber 4 which are connected in sequence, and the second pump 10 and the first heat exchanger 5 which are connected with the absorber 4 in sequence.
As shown in fig. 1, which is a schematic view of a connection structure of a flue gas waste heat recovery system in a refrigeration mode to realize refrigeration in summer, the generator 1 has a cavity for storing a refrigerant, specifically, the refrigerant is water; the generator 1 is provided with a first flue gas inlet, a first flue gas outlet, a first refrigerant steam outlet, a first absorbent inlet and a second absorbent outlet; the first flue gas inlet is communicated with the first flue gas outlet; the first flue gas inlet is connected with a flue gas collecting device 6, specifically, the first absorbent is a lithium bromide solution with a first concentration, the second absorbent is a lithium bromide solution with a second concentration, and the first concentration is less than the second concentration, namely the lithium bromide solution with the first concentration is a lithium bromide dilute solution, and the lithium bromide solution with the second concentration is a lithium bromide concentrated solution; the flue gas collecting device 6 is a tail flue of the waste heat boiler.
The condenser 2 is provided with a first refrigerant vapor inlet and a first refrigerant outlet, which are communicated.
The evaporator 3 is provided with a first refrigerant inlet, a second refrigerant steam outlet, a chilled water inlet and a chilled water outlet; the first refrigerant inlet is communicated with the second refrigerant steam outlet, and the chilled water inlet is communicated with the chilled water outlet; the first refrigerant inlet is connected with the first refrigerant outlet; be connected cold source user 11 between refrigerated water import and the refrigerated water export, it is specific, cold source user 11 includes: cold users and refrigeration appliances. A first pump 9, i.e. an evaporator pump, is connected between the second refrigerant outlet and the second refrigerant inlet provided in said evaporator 3. The throttle valve 8 is disposed between the first refrigerant inlet and the first refrigerant outlet.
The first heat exchanger 5 is provided with a second low-temperature side inlet, a second low-temperature side outlet, a second high-temperature side inlet and a second high-temperature side outlet; and the second low-temperature side inlet is communicated with the second low-temperature side outlet, and the second high-temperature side inlet is communicated with the second high-temperature side outlet.
The absorber 4 is provided with a second refrigerant vapor inlet, a second absorbent inlet and a first absorbent outlet; the second low-temperature side inlet is connected with the first absorbent outlet, the second low-temperature side outlet is connected with the first absorbent inlet, the second high-temperature side inlet is connected with the second absorbent outlet, and the second high-temperature side outlet is connected with the second absorbent inlet; the second refrigerant vapor inlet is connected to the second refrigerant vapor outlet. A second pump 10, i.e. an absorber pump, is arranged between the second low-temperature-side inlet and the first absorbent outlet.
The second heat exchanger 7 is provided with a first low-temperature side inlet, a first low-temperature side outlet, a first high-temperature side inlet and a first high-temperature side outlet; the first low-temperature side inlet is connected with the flue gas collecting device 6, and the first low-temperature side outlet is connected with the first flue gas inlet; the first low-temperature side inlet is communicated with the first low-temperature side outlet, and specifically, the second heat exchanger 7 is a smoke-water heat exchanger.
The condenser 2 is further provided with a first cooling water inlet and a first cooling water outlet, the first cooling water inlet is communicated with the first cooling water outlet, and the first cooling water inlet is connected with the first high-temperature side inlet. The absorber 4 is further provided with a second cooling water inlet and a second cooling water outlet, the second cooling water inlet is communicated with the second cooling water outlet, the second cooling water inlet is connected with the first high-temperature side outlet, and the second cooling water outlet is connected with the first cooling water inlet.
As shown in fig. 2, which is a schematic view of a connection structure of the flue gas waste heat recovery system in a heating mode to realize heating in winter, the absorber 4 is further provided with a first user water inlet and a first user water outlet; the first user water inlet is communicated with the first user water outlet; the condenser 2 is also provided with a second user water inlet and a second user water outlet; the second user water inlet is communicated with the second user water outlet; the first user water inlet is connected with the second user water outlet, and the first user water outlet is connected with the second user water inlet; a heat source user 12 is provided on a pipeline connecting the first user water inlet and the second user water outlet or on a pipeline connecting the first user water outlet and the second user water inlet, specifically, the heat source user 12 includes: thermal users and thermal processing equipment. The evaporator 3 is also provided with a second flue gas inlet and a second flue gas outlet; the second flue gas inlet is communicated with the second flue gas outlet; the second flue gas inlet is connected with the first flue gas outlet.
The recovery process of the flue gas waste heat recovery system is briefly as follows: in a refrigeration mode, low-temperature flue gas is discharged from a tail flue of the waste heat boiler, enters the flue gas-water heat exchanger, is heated by high-temperature cooling water from the condenser 2, becomes high-temperature flue gas, and then enters the generator 1, and the high-temperature cooling water releases heat to become low-temperature cooling water, and then enters the absorber 4. The dilute lithium bromide solution enters the first heat exchanger 5 through the absorber pump at the outlet of the absorber 4, enters the generator 1 after absorbing the heat of the concentrated lithium bromide solution from the generator 1, and further absorbs the heat of the flue gas, the high-temperature flue gas releases heat to become low-temperature flue gas and then is discharged to the atmosphere, the refrigerant is continuously vaporized after the dilute lithium bromide solution absorbs heat, the refrigerant steam enters the condenser 2, and the concentrated lithium bromide solution releases heat to the dilute lithium bromide solution through the first heat exchanger 5 and then enters the absorber 4. In the condenser 2, the refrigerant vapor releases heat, transfers heat to the medium-temperature cooling water from the absorber 4, is condensed into liquid refrigerant after being cooled, is depressurized by the throttle valve 8, and then enters the evaporator 3. In the evaporator 3, the liquid refrigerant is sprayed on a freezing water pipe through an evaporator pump to absorb heat and vaporize the refrigerant into refrigerant steam, then the refrigerant steam enters the absorber 4, and the freezing water is sent to a cold user after being cooled, so that the aim of refrigeration is fulfilled. In the absorber 4, refrigerant vapor is absorbed by the lithium bromide concentrated solution from the first heat exchanger 5 and is recovered to be a lithium bromide dilute solution again, heat released in the absorption process is absorbed by low-temperature cooling water from the smoke-water heat exchanger to become medium-temperature cooling water, and the medium-temperature cooling water enters the condenser 2 to complete a round of refrigeration cycle.
In the heating mode, low-temperature flue gas is discharged from a tail flue of the waste heat boiler and then directly enters the generator 1. The dilute lithium bromide solution enters a first heat exchanger 5 through an absorber pump at an outlet of an absorber 4, the dilute lithium bromide solution enters a generator 1 after absorbing heat of the concentrated lithium bromide solution from the generator 1, the heat of flue gas is further absorbed, the flue gas releases heat to become low-temperature flue gas and then enters an evaporator 3, the dilute lithium bromide solution absorbs heat, a refrigerant is continuously vaporized, refrigerant steam enters a condenser 2, and the concentrated lithium bromide solution releases heat to the dilute lithium bromide solution through the first heat exchanger 5 and then enters the absorber 4. In the condenser 2, the refrigerant vapor releases heat, and transfers the heat to the medium-temperature user water from the absorber 4, and the medium-temperature user water is sent to a heat user or heat treatment equipment, so that the heating purpose is realized, and the refrigerant vapor is condensed into liquid refrigerant after being cooled, and enters the evaporator 3 after being depressurized by the throttle valve 8. In the evaporator 3, the liquid refrigerant is sprayed on a flue gas pipeline through an evaporator pump to absorb heat and vaporize into refrigerant vapor, then the refrigerant vapor enters the absorber 4, and the flue gas is further cooled and then discharged into the atmosphere. In the absorber 4, refrigerant vapor is absorbed by the lithium bromide concentrated solution from the first heat exchanger 5 and is recovered to be a lithium bromide dilute solution again, and heat released in the absorption process is absorbed by low-temperature user water from a heat user or heat treatment equipment to become medium-temperature user water and enter the condenser 2 to complete a round of heating cycle.
As an alternative embodiment, the second pump 10 is disposed between the second low temperature side outlet and the first absorbent inlet.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (9)
1. The utility model provides a flue gas waste heat recovery system which characterized in that includes:
the generator (1) is provided with a cavity for storing a refrigerant, a first flue gas inlet, a first flue gas outlet, a first refrigerant steam outlet, a first absorbent inlet and a second absorbent outlet; the first flue gas inlet is communicated with the first flue gas outlet; the first flue gas inlet is connected with a flue gas collecting device (6);
a condenser (2) provided with a first refrigerant vapor inlet and a first refrigerant outlet, the first refrigerant vapor inlet and the first refrigerant outlet being in communication;
the evaporator (3) is provided with a first refrigerant inlet, a second refrigerant steam outlet, a chilled water inlet and a chilled water outlet; the first refrigerant inlet is communicated with the second refrigerant steam outlet, and the chilled water inlet is communicated with the chilled water outlet; the first refrigerant inlet is connected with the first refrigerant outlet; a cold source user (11) is connected between the chilled water inlet and the chilled water outlet;
the first heat exchanger (5) is provided with a second low-temperature side inlet, a second low-temperature side outlet, a second high-temperature side inlet and a second high-temperature side outlet; the second low-temperature side inlet is communicated with the second low-temperature side outlet, and the second high-temperature side inlet is communicated with the second high-temperature side outlet;
an absorber (4) provided with a second refrigerant vapor inlet, a second absorbent inlet and a first absorbent outlet;
the second low-temperature side inlet is connected with the first absorbent outlet, the second low-temperature side outlet is connected with the first absorbent inlet, the second high-temperature side inlet is connected with the second absorbent outlet, and the second high-temperature side outlet is connected with the second absorbent inlet; the second refrigerant vapor inlet is connected to the second refrigerant vapor outlet.
2. The flue gas waste heat recovery system according to claim 1,
the absorber (4) is also provided with a first user water inlet and a first user water outlet; the first user water inlet is communicated with the first user water outlet;
a second user water inlet and a second user water outlet are also formed in the condenser (2); the second user water inlet is communicated with the second user water outlet; the first user water inlet is connected with the second user water outlet, and the first user water outlet is connected with the second user water inlet;
and a heat source user (12) is arranged on the pipeline connecting the first user water inlet and the second user water outlet or the pipeline connecting the first user water outlet and the second user water inlet.
3. The flue gas waste heat recovery system of claim 2, further comprising:
the second heat exchanger (7) is provided with a first low-temperature side inlet, a first low-temperature side outlet, a first high-temperature side inlet and a first high-temperature side outlet; the first low-temperature side inlet is connected with a flue gas collecting device (6), and the first low-temperature side outlet is connected with the first flue gas inlet; the first low-temperature side inlet is communicated with the first low-temperature side outlet;
the condenser (2) is also provided with a first cooling water inlet and a first cooling water outlet, the first cooling water inlet is communicated with the first cooling water outlet, and the first cooling water inlet is connected with the first high-temperature side inlet;
the absorber (4) is further provided with a second cooling water inlet and a second cooling water outlet, the second cooling water inlet is communicated with the second cooling water outlet, the second cooling water inlet is connected with the first high-temperature side outlet, and the second cooling water outlet is connected with the first cooling water inlet.
4. The flue gas waste heat recovery system according to any one of claims 1 to 3,
the evaporator (3) is also provided with a second flue gas inlet and a second flue gas outlet; the second flue gas inlet is communicated with the second flue gas outlet;
the second flue gas inlet is connected with the first flue gas outlet.
5. The flue gas waste heat recovery system according to any one of claims 1 to 3, further comprising:
and two ends of the first pump (9) are respectively connected with a second refrigerant outlet and a second refrigerant inlet which are arranged on the evaporator (3).
6. The flue gas waste heat recovery system according to any one of claims 1 to 3, further comprising:
a throttle (8) disposed between the first refrigerant inlet and the first refrigerant outlet.
7. The flue gas waste heat recovery system according to any one of claims 1 to 3, further comprising:
a second pump (10) disposed between the second low temperature side inlet and the first absorbent outlet.
8. The flue gas waste heat recovery system according to claim 7,
the refrigerant is water, the first absorbent is a lithium bromide solution with a first concentration, the second absorbent is a lithium bromide solution with a second concentration, and the first concentration is less than the second concentration.
9. The flue gas waste heat recovery system according to claim 2 or 3,
the cold source user (11) comprises: cold users and refrigeration equipment;
the heat source user (12) comprises: thermal users and thermal processing equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211108342.6A CN115654769A (en) | 2022-09-09 | 2022-09-09 | Flue gas waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211108342.6A CN115654769A (en) | 2022-09-09 | 2022-09-09 | Flue gas waste heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115654769A true CN115654769A (en) | 2023-01-31 |
Family
ID=84983689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211108342.6A Pending CN115654769A (en) | 2022-09-09 | 2022-09-09 | Flue gas waste heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115654769A (en) |
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2022
- 2022-09-09 CN CN202211108342.6A patent/CN115654769A/en active Pending
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