CN115200249A - Lithium bromide system utilizing industrial waste heat and control method - Google Patents
Lithium bromide system utilizing industrial waste heat and control method Download PDFInfo
- Publication number
- CN115200249A CN115200249A CN202210686374.8A CN202210686374A CN115200249A CN 115200249 A CN115200249 A CN 115200249A CN 202210686374 A CN202210686374 A CN 202210686374A CN 115200249 A CN115200249 A CN 115200249A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- heat exchange
- waste heat
- water
- lithium bromide
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D15/00—Other domestic- or space-heating systems
- F24D15/02—Other domestic- or space-heating systems consisting of self-contained heating units, e.g. storage heaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F12/00—Use of energy recovery systems in air conditioning, ventilation or screening
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/02—Machines, plants or systems, using particular sources of energy using waste heat, e.g. from internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Abstract
The invention provides a lithium bromide system utilizing industrial waste heat and a control method thereof, wherein the lithium bromide system utilizing industrial waste heat comprises a lithium bromide unit; the main-stage waste heat recovery and heat exchange pipeline is used for enabling a medium with industrial waste heat to perform heat exchange reaction in the lithium bromide unit; the air-conditioning heating pipeline is at least partially arranged in the lithium bromide unit; the heat exchange branch is respectively communicated with an air conditioner heating water return pipeline and the air conditioner heating water supply pipeline; the heat exchanger unit is used for carrying out heat exchange reaction on air conditioner return water circulating in the heat exchange branch; and the secondary waste heat recovery heat exchange pipeline is communicated with the primary waste heat recovery heat exchange pipeline. The invention enables the lithium bromide unit to fully use the industrial waste heat and provide heating for the air conditioner of a user, thereby realizing the secondary utilization of the industrial waste heat and meeting the national requirements of energy conservation and emission reduction.
Description
Technical Field
The invention relates to the technical field of lithium bromide units, in particular to a lithium bromide system utilizing industrial waste heat and a control method.
Background
In most production processes, heat of industrial waste heat is often directly discharged to the atmosphere, which not only causes a great deal of waste of energy, but also causes heat pollution to the environment. According to the regulations of relevant specifications, heating and air conditioning users near industrial enterprises should preferentially utilize industrial waste heat and waste heat to perform heating or air conditioning. However, in practical application, most enterprises do not utilize the part of energy due to the problems that more accessory equipment needing to be operated is complex in operation and maintenance management, poor in heat source stability and the like. Therefore, how to effectively utilize the industrial waste heat and waste heat is a problem which must be treated and solved scientifically.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art.
To this end, the invention provides, in a first aspect, a lithium bromide system that utilizes industrial waste heat.
The invention provides a control method of a lithium bromide system utilizing industrial waste heat.
The invention provides a lithium bromide system using industrial waste heat, comprising:
a lithium bromide unit;
the system comprises a main-stage waste heat recovery heat exchange pipeline, a lithium bromide unit and a heat exchange pipeline, wherein a medium with industrial waste heat circulates in the main-stage waste heat recovery heat exchange pipeline, and at least part of the main-stage waste heat recovery heat exchange pipeline is arranged in the lithium bromide unit so that the medium with the industrial waste heat performs a heat exchange reaction in the lithium bromide unit;
the lithium bromide unit comprises a lithium bromide unit, an air-conditioning heating pipeline, a first manual switching valve, a second manual switching valve and a control unit, wherein the lithium bromide unit is arranged in the lithium bromide unit and is used for generating lithium bromide;
the air conditioner heating water return pipeline is internally communicated with return water of the air conditioner, and the return water is subjected to heat exchange reaction in the lithium bromide unit;
the heat exchange reaction is carried out between return water and a medium with industrial waste heat, and the return water absorbs the industrial waste heat of the medium and then is supplied to an air conditioner by the air conditioner heating water supply pipeline;
the heat exchange branch is respectively communicated with an air conditioner heating water return pipeline and the air conditioner heating water supply pipeline, and a third manual switching valve and a fourth manual switching valve are arranged at the connection position;
at least part of the heat exchange branch is arranged in the heat exchange unit so as to enable air conditioner backwater circulating in the heat exchange branch to carry out heat exchange reaction;
and the secondary waste heat recovery heat exchange pipeline is communicated with the primary waste heat recovery heat exchange pipeline, and at least part of the secondary waste heat recovery heat exchange pipeline is arranged in the heat exchange unit, so that the return water of the air conditioner and a medium with industrial waste heat exchange heat in the heat exchange unit.
The lithium bromide system utilizing industrial waste heat according to the technical scheme of the invention can also have the following additional technical characteristics:
in the above technical solution, the cooling water system further includes a cooling water pipeline, and the cooling water pipeline at least includes:
the cooling tower adopts a fan cooling mode;
one end of the cooling water supply pipeline is communicated with the cooling tower, the other end of the cooling water supply pipeline is divided into a plurality of water supply branches, and each water supply branch corresponds to one lithium bromide unit so that cooling water enters the electric lithium bromide unit for heat exchange;
a cooling water pump disposed in the cooling water supply pipeline;
and one end of the cooling water return pipeline is communicated with the plurality of water supply branches to collect cooling water, the other end of the cooling water return pipeline forms a plurality of return water branches, and the return water branches enter the cooling tower and spray the cooling water into the cooling tower for cooling.
In the above technical scheme, still include the communicating pipe way, the communicating pipe way is with cooling water supply pipe way and cooling water return water pipeline intercommunication, and is equipped with the intercommunication electric valve.
In the technical scheme, a cooling water supply electric valve is arranged at the starting point of each water supply branch, and a cooling water supply flow sensor is arranged at the terminal point of each water supply branch; and
and the return water branch is provided with a cooling water return water electric valve.
In the above technical solution, the cooling water supply pipeline is provided with a water supply temperature sensor; and
and the cooling water return pipeline is provided with a return water temperature sensor.
In the above technical solution, an inlet temperature sensor and an inlet flow sensor are arranged at the inlet end of the main-stage waste heat recovery heat exchange pipeline, and an outlet temperature sensor is arranged at the outlet end of the main-stage waste heat recovery heat exchange pipeline;
the main-stage waste heat recovery heat exchange pipeline is provided with a plurality of waste heat recovery heat exchange branches, each waste heat recovery heat exchange branch corresponds to one lithium bromide unit, a waste heat exchange electric valve is arranged at the initial point of each waste heat recovery heat exchange branch, and a waste heat exchange flow sensor is arranged at the final point.
In the technical scheme, the air-conditioning heating water return pipeline is also provided with a water collector, a freezing water pump, a heating water return pipeline pressure sensor and a heating water return pipeline temperature sensor; the water collector is provided with a plurality of groups of ports, and the ports are communicated with a water return pipeline of the air conditioner; and
the air conditioner heating return water pipeline forms a plurality of heating return water branches, each heating return water branch corresponds to one lithium bromide unit, and each heating return water branch is provided with a heating return water electric valve and a heating return water flow sensor.
In the technical scheme, the air-conditioning heating water supply pipeline is also provided with a heating water supply temperature sensor, a heating water supply pressure sensor and a heating water supply flow sensor;
the tail end of the air-conditioning heating water supply pipeline is provided with a water distributor, the water distributor is communicated with the water collector through a connecting pipeline, and the connecting pipeline is provided with a connecting electric valve.
In the technical scheme, the air conditioner water supply system further comprises a water supply pipeline, wherein the water supply pipeline comprises a softening water tank, a water supply pump and an air pressure expansion water tank which are sequentially connected, and the water supply pipeline is communicated with the air conditioner heating water return pipeline; and/or
The heat exchange branch is provided with a warm water pump and a heat exchange temperature sensor; and/or
And two groups of fifth manual switching valves are arranged at the connection point of the secondary waste heat recovery heat exchange pipeline and the primary waste heat recovery heat exchange pipeline, and each group of fifth manual switching valves comprises two fifth manual switching valves which are arranged at the inlet section and the outlet section of the primary waste heat recovery heat exchange pipeline and at the inlet section and the outlet section of the secondary waste heat recovery heat exchange pipeline.
The invention also provides a control method of the lithium bromide system utilizing the industrial waste heat, which refers to the lithium bromide system utilizing the industrial waste heat in any one of the technical schemes, and is characterized by comprising the following steps:
the lithium bromide system utilizing the industrial waste heat has three operation modes, wherein the operation modes are as follows:
(1) A hybrid operation mode:
starting a cooling water pipeline and a water supplementing pipeline;
opening a first manual switching valve of an air-conditioning heating water return pipeline and a second manual switching valve of an air-conditioning heating water supply pipeline; a third manual switching valve and a fourth manual switching valve of the heat exchange branch are opened; opening all fifth manual switching valves of the primary waste heat recovery heat exchange pipeline and the secondary waste heat recovery heat exchange pipeline;
the medium with industrial waste heat enters a primary waste heat recovery heat exchange pipeline and exchanges heat with air conditioner return water in the lithium bromide unit, and the return water after heat exchange is supplied to an air conditioner for heat supply through an air conditioner heating water supply pipeline; and
the medium with industrial waste heat enters a secondary waste heat recovery heat exchange pipeline and exchanges heat with air conditioner return water in a heat exchanger unit, and the return water after heat exchange enters an air conditioner heating water supply pipeline through a heat exchange branch to supply heat to an air conditioner;
(2) The main-stage waste heat recovery heat exchange operation mode is as follows:
starting a cooling water pipeline and a water replenishing pipeline;
opening a first manual switching valve of an air-conditioning heating water return pipeline and a second manual switching valve of an air-conditioning heating water supply pipeline; a third manual switching valve and a fourth manual switching valve for closing the heat exchange branch; opening a fifth manual switching valve positioned on the primary waste heat recovery heat exchange pipeline, and closing all fifth manual switching valves positioned on the secondary waste heat recovery heat exchange pipeline;
the medium with industrial waste heat enters a primary waste heat recovery heat exchange pipeline and exchanges heat with air conditioner return water in the lithium bromide unit, and the return water after heat exchange is supplied to an air conditioner for heat supply through an air conditioner heating water supply pipeline;
(3) And a secondary waste heat recovery heat exchange operation mode:
starting a cooling water pipeline and a water supplementing pipeline;
a first manual switching valve of an air-conditioning heating water return pipeline and a second manual switching valve of an air-conditioning heating water supply pipeline are closed; a third manual switching valve and a fourth manual switching valve of the heat exchange branch are opened; closing a fifth manual switching valve positioned on the primary waste heat recovery heat exchange pipeline, and opening all fifth manual switching valves positioned on the secondary waste heat recovery heat exchange pipeline;
and the medium with industrial waste heat enters a secondary waste heat recovery heat exchange pipeline and exchanges heat with air conditioner return water in the heat exchanger unit, and the return water after heat exchange enters an air conditioner heating water supply pipeline through a heat exchange branch to supply heat to the air conditioner.
In addition, in the refrigeration mode, an operator selects the refrigeration mode on a workstation computer and a field lithium bromide unit according to the seasonal temperature, and the manual seasonal switching valve is switched to the lithium bromide unit to output cold water for air conditioning to a user.
Wherein, still include and move the detection parameter: outdoor dry-bulb temperature, relative humidity, chilled water supply and return water temperature, warm water supply and return water temperature, cooling water supply and return water temperature, waste heat water supply (steam) return water (condensed water) temperature, and chilled water inlet and outlet water pressure.
Controlling the number of units: the running number of the water chilling units is automatically adjusted according to the required cooling load, so that the aim of saving energy is fulfilled.
The unit starts and stops the order: a cooling water valve- > a cooling water tower water inlet valve- > a cooling water pump- > (a cooling tower fan- >) a chilled water valve- > a chilled water pump- > a lithium bromide unit; the shutdown process is the reverse of the startup process. Wherein the cooling tower fan can be controlled alone, and the opening of the lithium bromide unit can be started only after the water flow switch of the cooling water/cold water is opened.
Controlling the timing start and stop of the unit: and under the condition of non-full load operation, the operation of the equipment is converted at regular time so as to keep the average operation time and realize energy-saving operation.
The running state of the unit: the working state of each unit of the system is monitored, and the system can automatically display, print at regular time and alarm faults.
Controlling the temperature of cooling water: the water mixing amount is adjusted when the refrigerator runs in a transition season, so that the temperature of the freezing water entering the refrigerator set is not too low.
And (3) cooling tower control: the number of the cooling tower fans is automatically controlled to be started and stopped according to outdoor climate conditions and the set temperature of cooling water, and the safe operation of the cooling tower fans and the cooling water pump is ensured.
And (3) water pump protection control: on the premise of meeting the water quantity, the power consumption of the water pump is reduced as much as possible; and after the water pump is started, if the water pump fails, the water pump is automatically stopped, and the standby pump is automatically put into operation.
And (3) controlling the pressure difference of water supply and return: the opening of the valve is adjusted according to the differential pressure of the water collecting and distributing device, and the supply pressure and the return pressure can be automatically balanced.
Compared with the prior art, the lithium bromide system utilizing the industrial waste heat and the control method thereof provided by the invention have the following beneficial effects:
1. the lithium bromide system utilizing the industrial waste heat provided by the invention enables the lithium bromide unit to be fully separated from the industrial waste heat and provides heating for an air conditioner of a user, thereby realizing secondary utilization of the industrial waste heat and meeting the national requirements of energy conservation and emission reduction;
2. the control method of the lithium bromide system utilizing the industrial waste heat can fully utilize the lithium bromide system, select different operation modes under different working conditions, meet the user requirements and realize energy conservation and emission reduction.
3. The automatic operation of the whole system is realized, the workload of operation and maintenance personnel is reduced, and the operation accidents caused by manual misoperation are greatly reduced; the risk of operation accidents is reduced, and safe and stable operation is guaranteed.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic connection diagram of a lithium bromide system using industrial waste heat according to the present invention;
FIG. 2 is an enlarged view of FIG. 1 in area A;
FIG. 3 is an enlarged view of FIG. 1 in area B;
fig. 4 is an enlarged view of fig. 1 in the area C.
Wherein, the correspondence between the reference numbers and the component names in fig. 1 to 4 is:
1. a lithium bromide unit;
2. a main-stage waste heat recovery heat exchange pipeline;
21. an inlet temperature sensor; 22. an inlet flow sensor; 23. an outlet temperature sensor;
24. a waste heat recovery heat exchange branch; 241. a waste heat exchange electric valve; 242. a waste heat exchange flow sensor;
3. an air conditioning heating pipeline;
31. an air-conditioning heating water return pipeline; 311. a water collector; 312. a chilled water pump; 313. a heating return line pressure sensor; 314. a temperature sensor of a heating water return pipeline; 315. a heating water return branch; 316. a heating backwater electric valve; 317. a heating backwater flow sensor;
32. an air-conditioning heating water supply pipeline; 321. a heating and water supply temperature sensor; 322. a heating water supply pressure sensor; 323. a heating supply water flow sensor; 324. a water separator; 325. connecting a pipeline; 326. an electric valve is connected;
33. a first manual switching valve; 34. a second manual switching valve;
4. a heat exchange branch;
41. a third manual switching valve; 42. a fourth manual switching valve; 43. a warm water pump; 44. a heat exchange temperature sensor;
5. a heat exchanger unit;
6. a secondary waste heat recovery heat exchange pipeline;
61. a fifth manual switching valve;
7. a cooling water line;
71. a cooling tower;
72. a cooling water supply line; 721. a supply water temperature sensor;
73. a water supply branch; 731. a cooling water supply electric valve; 732. a cooling water supply flow sensor;
74. a cooling water pump;
75. a cooling water return pipeline; 751. a backwater temperature sensor;
76. a water return branch; 761. a cooling water backwater electric valve;
77. a communicating pipeline; 78. the electric valve is communicated;
8. a water replenishing pipeline; 81. softening the water tank; 82. a water replenishing pump; 83. a pneumatic expansion tank.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described and thus the scope of the present invention is not limited by the specific embodiments disclosed below.
A lithium bromide system and a control method using industrial waste heat according to some embodiments of the present invention are described below with reference to fig. 1 to 4.
Some embodiments of the present application provide a lithium bromide system that utilizes industrial waste heat.
As shown in fig. 1 to 4, a first embodiment of the present invention provides a lithium bromide system using industrial waste heat, including:
a lithium bromide unit 1;
the lithium bromide unit 1 comprises a main-stage waste heat recovery heat exchange pipeline 2, wherein a medium with industrial waste heat circulates in the main-stage waste heat recovery heat exchange pipeline, and at least part of the main-stage waste heat recovery heat exchange pipeline 2 is arranged in the lithium bromide unit 1 so that the medium with the industrial waste heat performs heat exchange reaction in the lithium bromide unit 1;
an air-conditioning heating pipeline 3, wherein at least a part of the air-conditioning heating pipeline 3 is arranged in the lithium bromide unit 1, the air-conditioning heating pipeline 3 at least comprises an air-conditioning heating return pipeline 31 and an air-conditioning heating supply pipeline 32 which are mutually communicated, and the air-conditioning heating pipeline 3 is respectively provided with a first manual switching valve 33 and a second manual switching valve 34;
the air-conditioning heating water return pipeline 31 is internally communicated with return water of an air conditioner, and the return water is subjected to heat exchange reaction in the lithium bromide unit 1;
the heat exchange reaction occurs between return water and a medium with industrial waste heat, and the return water absorbs the industrial waste heat of the medium and then is supplied to an air conditioner by the air conditioner heating water supply pipeline 32;
a heat exchange branch 4, wherein the heat exchange branch 4 is respectively communicated with an air-conditioning heating water return pipeline 31 and the air-conditioning heating water supply pipeline 32, and a third manual switching valve 41 and a fourth manual switching valve 42 are arranged at the connection position;
at least part of the heat exchange branch 4 is arranged in the heat exchanger unit 5, so that air conditioner return water circulating in the heat exchange branch 4 is subjected to heat exchange reaction;
and the secondary waste heat recovery heat exchange pipeline 6 is communicated with the primary waste heat recovery heat exchange pipeline 2, and at least part of the secondary waste heat recovery heat exchange pipeline 6 is arranged in the heat exchange unit, so that the return water of the air conditioner and a medium with industrial waste heat exchange in the heat exchange unit.
In this embodiment, the cooling water system further includes a cooling water pipeline 7, and the cooling water pipeline 7 at least includes:
a cooling tower 71, wherein the cooling tower 71 adopts a fan cooling mode;
a cooling water supply pipeline 72, one end of which is communicated with the cooling tower 71, and the other end of which is divided into a plurality of water supply branches 73, wherein each water supply branch 73 corresponds to one lithium bromide unit 1, so that cooling water enters the lithium bromide unit 1 for heat exchange;
a cooling water pump 74 provided in the cooling water supply line 72;
and one end of the cooling water return pipeline 75 is communicated with the plurality of water supply branches 73 to collect cooling water, the other end of the cooling water return pipeline forms a plurality of water return branches 76, and the water return branches 76 enter the cooling tower 71 and spray the cooling water into the cooling tower 71 for cooling.
In the present embodiment, a communication line 77 is further included, the communication line 77 communicating the cooling water supply line 72 and the cooling water return line 75, and is equipped with a communication electric valve 78.
In the present embodiment, a cooling water supply electric valve 731 is provided at a start point of each water supply branch 73, and a cooling water supply flow sensor 732 is provided at an end point of each water supply line; and
the return water branch 76 is provided with a cooling water return electric valve 761.
In the present embodiment, the cooling water supply line 72 is provided with a supply water temperature sensor 721; and
the cooling water return pipe 75 is provided with a return water temperature sensor 751.
In this embodiment, an inlet temperature sensor 21 and an inlet flow sensor 22 are arranged at an inlet end of the primary waste heat recovery heat exchange pipeline 2, and an outlet temperature sensor 23 is arranged at an outlet end;
the main-stage waste heat recovery and heat exchange pipeline 2 is provided with a plurality of waste heat recovery and heat exchange branches 24, each waste heat recovery and heat exchange branch 24 corresponds to one lithium bromide unit 1, a waste heat exchange electric valve 241 is arranged at the initial point of each waste heat recovery and heat exchange branch 24, and a waste heat exchange flow sensor 242 is arranged at the terminal point.
In this embodiment, the air-conditioning heating and water returning pipeline 31 is further provided with a water collector 311, a chilled water pump 312, a heating and water returning pipeline pressure sensor 313 and a heating and water returning pipeline temperature sensor 314; the water collector 311 has a plurality of ports, and the ports are communicated with a water return pipeline of the air conditioner; and
the air-conditioning heating return water pipeline 31 forms a plurality of heating return water branches 315, each heating return water branch 315 corresponds to one lithium bromide unit 1, and each heating return water branch 315 is provided with a heating return water electric valve 316 and a heating return water flow sensor 317.
In the present embodiment, the air-conditioning and heating water supply line 32 is further provided with a heating water supply temperature sensor 321, a heating water supply pressure sensor 322, and a heating water supply flow rate sensor 323;
a water separator 324 is disposed at the end of the air conditioning and heating water supply pipeline 32, the water separator 324 is communicated with the water collector 311 through a connecting pipeline 325, and the connecting pipeline 325 is equipped with a connecting electric valve 326.
In this embodiment, the air conditioner further includes a water replenishing pipeline 8, the water replenishing pipeline 8 includes a softened water tank 81, a water replenishing pump 82 and an air pressure expansion water tank 83 which are connected in sequence, and the water replenishing pipeline 8 is communicated with the air conditioner heating return water pipeline 31; and/or
The heat exchange branch 4 is provided with a warm water pump 43 and a heat exchange temperature sensor 44; and/or
Two groups of fifth manual switching valves 61 are arranged at the connection point of the secondary waste heat recovery heat exchange pipeline 6 and the primary waste heat recovery heat exchange pipeline 2, and each group of fifth manual switching valves 61 comprises two valves and is arranged at the inlet section and the outlet section of the primary waste heat recovery heat exchange pipeline 2 and at the inlet section and the outlet section of the secondary waste heat recovery heat exchange pipeline 6.
A second embodiment of the present invention provides a method for controlling a lithium bromide system using industrial waste heat, which incorporates the lithium bromide system using industrial waste heat as described in any one of the above embodiments, and includes the following steps:
the lithium bromide system using the industrial waste heat has three operation modes, wherein the operation modes are as follows:
(1) A hybrid operation mode:
starting a cooling water pipeline 7 and a water supplementing pipeline 8;
a first manual switching valve 33 for opening the air-conditioning heating water return line 31 and a second manual switching valve 34 for opening the air-conditioning heating water supply line 32; a third manual switching valve 41 and a fourth manual switching valve 42 for opening the heat exchange branch 4; and opening all fifth manual switching valves 61 of the primary waste heat recovery heat exchange pipeline 2 and the secondary waste heat recovery heat exchange pipeline 6;
the medium with industrial waste heat enters the primary waste heat recovery heat exchange pipeline 2, and exchanges heat with air conditioner return water in the lithium bromide unit 1, and the return water after heat exchange is supplied to the air conditioner for heat supply through the air conditioner heating water supply pipeline 32; and
the medium with industrial waste heat enters the secondary waste heat recovery heat exchange pipeline 6 and exchanges heat with air conditioner backwater in the heat exchanger unit 5, and the backwater after heat exchange enters the air conditioner heating water supply pipeline 32 through the heat exchange branch 4 to supply heat to the air conditioner;
(2) The main-stage waste heat recovery heat exchange operation mode is as follows:
starting a cooling water pipeline 7 and a water supplementing pipeline 8;
a first manual switching valve 33 for opening the air-conditioning heating water return line 31 and a second manual switching valve 34 for opening the air-conditioning heating water supply line 32; a third manual switching valve 41 and a fourth manual switching valve 42 for closing the heat exchange branch 4; and opening the fifth manual switching valve 61 positioned in the primary waste heat recovery heat exchange pipeline 2, and closing all the fifth manual switching valves 61 positioned in the secondary waste heat recovery heat exchange pipeline 6;
the medium with industrial waste heat enters the primary waste heat recovery heat exchange pipeline 2, and exchanges heat with air conditioner return water in the lithium bromide unit 1, and the return water after heat exchange is supplied to the air conditioner for heat supply through the air conditioner heating water supply pipeline 32;
(3) And a secondary waste heat recovery heat exchange operation mode:
starting a cooling water pipeline 7 and a water supplementing pipeline 8;
a first manual switching valve 33 for closing the air-conditioning heating water return line 31 and a second manual switching valve 34 for closing the air-conditioning heating water supply line 32; a third manual switching valve 41 and a fourth manual switching valve 42 for opening the heat exchange branch 4; closing the fifth manual switching valve 61 positioned on the primary waste heat recovery heat exchange pipeline 2, and opening all the fifth manual switching valves 61 positioned on the secondary waste heat recovery heat exchange pipeline 6;
the medium with industrial waste heat enters the secondary waste heat recovery heat exchange pipeline 6, and exchanges heat with air conditioner return water in the heat exchanger unit 5, and the return water after heat exchange enters the air conditioner heating water supply pipeline 32 through the heat exchange branch 4 to supply heat to the air conditioner.
In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A lithium bromide system using industrial waste heat, comprising:
a lithium bromide unit (1);
the system comprises a main-stage waste heat recovery heat exchange pipeline (2), wherein a medium with industrial waste heat circulates in the main-stage waste heat recovery heat exchange pipeline, and at least part of the main-stage waste heat recovery heat exchange pipeline (2) is arranged in a lithium bromide unit (1) so that the medium with the industrial waste heat performs heat exchange reaction in the lithium bromide unit (1);
the lithium bromide unit is characterized by comprising an air-conditioning heating pipeline (3), wherein at least part of the air-conditioning heating pipeline (3) is arranged in the lithium bromide unit (1), the air-conditioning heating pipeline (3) is at least provided with an air-conditioning heating water return pipeline (31) and an air-conditioning heating water supply pipeline (32) which are mutually communicated, and the air-conditioning heating pipeline (3) is respectively provided with a first manual switching valve (33) and a second manual switching valve (34);
the air conditioner heating water return pipeline (31) is internally communicated with return water of an air conditioner, and the return water is subjected to heat exchange reaction in the lithium bromide unit (1);
the heat exchange reaction occurs between return water and a medium with industrial waste heat, and the return water absorbs the industrial waste heat of the medium and then is supplied to an air conditioner by the air conditioner heating water supply pipeline (32);
the heat exchange branch (4), the heat exchange branch (4) is respectively communicated with an air-conditioning heating water return pipeline (31) and the air-conditioning heating water supply pipeline (32), and a third manual switching valve (41) and a fourth manual switching valve (42) are arranged at the connection position;
at least part of the heat exchange branch (4) is arranged in the heat exchanger unit (5) so as to enable air conditioner backwater circulating in the heat exchange branch (4) to carry out heat exchange reaction;
and the secondary waste heat recovery heat exchange pipeline (6) is communicated with the primary waste heat recovery heat exchange pipeline (2), and at least part of the secondary waste heat recovery heat exchange pipeline (6) is arranged in the heat exchange unit, so that the return water of the air conditioner and a medium with industrial waste heat exchange in the heat exchange unit.
2. The lithium bromide system using industrial waste heat as claimed in claim 1, further comprising a cooling water pipeline (7), wherein the cooling water pipeline (7) at least comprises:
a cooling tower (71), wherein the cooling tower (71) adopts a fan cooling mode;
one end of the cooling water supply pipeline (72) is communicated with the cooling tower (71), the other end of the cooling water supply pipeline is divided into a plurality of water supply branches (73), and each water supply branch (73) corresponds to one lithium bromide unit (1) so that cooling water enters the electric lithium bromide unit (1) for heat exchange;
a cooling water pump (74) provided in the cooling water supply line (72);
and one end of the cooling water return pipeline (75) is communicated with the plurality of water supply branches (73) to collect cooling water, the other end of the cooling water return pipeline forms a plurality of water return branches (76), the water return branches (76) enter the cooling tower (71), and the cooling water is sprayed into the cooling tower (71) to be cooled.
3. The lithium bromide system using industrial waste heat according to claim 2, further comprising a communication pipeline (77), wherein the communication pipeline (77) communicates the cooling water supply pipeline (72) and the cooling water return pipeline (75), and is equipped with a communication electric valve (78).
4. The lithium bromide system using industrial residual heat according to claim 3,
a cooling water supply electric valve (731) is arranged at the starting point of each water supply branch (73), and a cooling water supply flow sensor (732) is arranged at the terminal point of each water supply pipeline; and
and the return water branch (76) is provided with a cooling water return water electric valve (761).
5. The lithium bromide system using industrial waste heat according to claim 4,
the cooling water supply pipeline (72) is provided with a water supply temperature sensor (721); and
and the cooling water return pipeline (75) is provided with a return water temperature sensor (751).
6. The lithium bromide system using industrial waste heat according to claim 5, characterized in that the inlet end of the primary waste heat recovery heat exchange pipeline (2) is provided with an inlet temperature sensor (21) and an inlet flow sensor (22), and the outlet end is provided with an outlet temperature sensor (23);
the main-stage waste heat recovery heat exchange pipeline (2) is provided with a plurality of waste heat recovery heat exchange branches (24), each waste heat recovery heat exchange branch (24) corresponds to one lithium bromide unit (1), a waste heat exchange electric valve (241) is arranged at the initial point of each waste heat recovery heat exchange branch (24), and a waste heat exchange flow sensor (242) is arranged at the terminal point.
7. The lithium bromide system using industrial residual heat according to claim 6,
the air-conditioning heating water return pipeline (31) is also provided with a water collector (311), a freezing water pump (312), a heating water return pipeline pressure sensor (313) and a heating water return pipeline temperature sensor (314); the water collector (311) is provided with a plurality of groups of ports, and the ports are communicated with a water return pipeline of the air conditioner; and
the air-conditioning heating return water pipeline (31) forms a plurality of heating return water branches (315), each heating return water branch (315) corresponds to one lithium bromide unit (1), and each heating return water branch (315) is provided with a heating return water electric valve (316) and a heating return water flow sensor (317).
8. The lithium bromide system using industrial waste heat according to claim 7, wherein the air-conditioning heating water supply pipeline (32) is further provided with a heating water supply temperature sensor (321), a heating water supply pressure sensor (322) and a heating water supply flow sensor (323);
the tail end of the air-conditioning and heating water supply pipeline (32) is provided with a water separator (324), the water separator (324) is communicated with the water collector (311) through a connecting pipeline (325), and the connecting pipeline (325) is provided with a connecting electric valve (326).
9. The lithium bromide system using industrial waste heat according to claim 8,
the air conditioner water supply system is characterized by further comprising a water supply pipeline (8), wherein the water supply pipeline (8) comprises a softening water tank (81), a water supply pump (82) and an air pressure expansion water tank (83) which are sequentially connected, and the water supply pipeline (8) is communicated with the air conditioner heating water return pipeline (31); and/or
The heat exchange branch (4) is provided with a warm water pump (43) and a heat exchange temperature sensor (44); and/or
And the connection point of the secondary waste heat recovery heat exchange pipeline (6) and the primary waste heat recovery heat exchange pipeline (2) is provided with two groups of fifth manual switching valves (61), and each group of fifth manual switching valves (61) comprises two valves, is arranged at the inlet section and the outlet section of the primary waste heat recovery heat exchange pipeline (2), and is arranged at the inlet section and the outlet section of the secondary waste heat recovery heat exchange pipeline (6).
10. A method for controlling a lithium bromide system using industrial waste heat, which is applied to the lithium bromide system using industrial waste heat according to any one of the above claims 1 to 9, and is characterized by comprising the following steps:
the lithium bromide system using the industrial waste heat has three operation modes, wherein the operation modes are as follows:
(1) A hybrid operation mode:
starting a cooling water pipeline (7) and a water supplementing pipeline (8);
a first manual switching valve (33) of an air-conditioning heating water return pipeline (31) and a second manual switching valve (34) of an air-conditioning heating water supply pipeline (32) are opened; a third manual switching valve (41) and a fourth manual switching valve (42) for opening the heat exchange branch (4); opening all fifth manual switching valves (61) of the primary waste heat recovery heat exchange pipeline (2) and the secondary waste heat recovery heat exchange pipeline (6);
the medium with industrial waste heat enters the primary waste heat recovery heat exchange pipeline (2), and exchanges heat with air conditioner return water in the lithium bromide unit (1), and the return water after heat exchange is supplied to an air conditioner for heat supply through an air conditioner heating water supply pipeline (32); and
the medium with industrial waste heat enters a secondary waste heat recovery heat exchange pipeline (6), heat exchange is carried out between the medium and air conditioner return water in a heat exchanger unit (5), and the return water after heat exchange enters an air conditioner heating water supply pipeline (32) through a heat exchange branch (4) to supply heat to an air conditioner;
(2) The main-stage waste heat recovery heat exchange operation mode comprises the following steps:
starting a cooling water pipeline (7) and a water supplementing pipeline (8);
a first manual switching valve (33) for opening the air-conditioning heating water return line (31) and a second manual switching valve (34) for opening the air-conditioning heating water supply line (32); a third manual switching valve (41) and a fourth manual switching valve (42) for closing the heat exchange branch (4); opening a fifth manual switching valve (61) positioned on the main-stage waste heat recovery heat exchange pipeline (2), and closing all fifth manual switching valves (61) positioned on the secondary-stage waste heat recovery heat exchange pipeline (6);
the medium with industrial waste heat enters a primary waste heat recovery heat exchange pipeline (2) and exchanges heat with air conditioner backwater in the lithium bromide unit (1), and the backwater after heat exchange is supplied to an air conditioner for heat supply through an air conditioner heating water supply pipeline (32);
(3) And a secondary waste heat recovery heat exchange operation mode:
starting a cooling water pipeline (7) and a water supplementing pipeline (8);
a first manual switching valve (33) for closing the air-conditioning heating water return line (31) and a second manual switching valve (34) for closing the air-conditioning heating water supply line (32); a third manual switching valve (41) and a fourth manual switching valve (42) for opening the heat exchange branch (4); the fifth manual switching valve (61) positioned on the main-stage waste heat recovery heat exchange pipeline (2) is closed, and all the fifth manual switching valves (61) positioned on the secondary-stage waste heat recovery heat exchange pipeline (6) are opened greatly;
the medium with the industrial waste heat enters the secondary waste heat recovery heat exchange pipeline (6) and exchanges heat with air conditioner backwater in the heat exchanger unit (5), and the backwater after heat exchange enters the air conditioner heating water supply pipeline (32) through the heat exchange branch (4) to supply heat for the air conditioner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210686374.8A CN115200249A (en) | 2022-06-17 | 2022-06-17 | Lithium bromide system utilizing industrial waste heat and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210686374.8A CN115200249A (en) | 2022-06-17 | 2022-06-17 | Lithium bromide system utilizing industrial waste heat and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115200249A true CN115200249A (en) | 2022-10-18 |
Family
ID=83575707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210686374.8A Pending CN115200249A (en) | 2022-06-17 | 2022-06-17 | Lithium bromide system utilizing industrial waste heat and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115200249A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277856A (en) * | 2013-05-28 | 2013-09-04 | 中国科学院广州能源研究所 | Solar seasonal cold and hot combined air conditioning system |
| CN103759354A (en) * | 2014-01-07 | 2014-04-30 | 广州万宝集团有限公司 | Solar drive two-stage lithium bromide refrigerating unit air conditioning system |
| CN103968598A (en) * | 2013-01-24 | 2014-08-06 | 盾安（天津）节能系统有限公司 | Large temperature difference centralized heating/cooling system |
| CN103983042A (en) * | 2014-05-13 | 2014-08-13 | 陕西科技大学 | Solar indoor cold and hot integrated system |
| CN108930995A (en) * | 2018-08-01 | 2018-12-04 | 东北大学 | A kind of central heating system of solar energy and low-grade industrial exhaust heat united heat |
| CN109631402A (en) * | 2018-12-20 | 2019-04-16 | 大连民族大学 | The float glass waste-heat recovery device of lithium bromide heat pump heating |
| CN110455006A (en) * | 2019-08-06 | 2019-11-15 | 辽宁华融富瑞新能源科技股份有限公司 | It is a kind of metallurgy oxyen manutactory's waste heat recycling with energy cascade utilization coupled system |
| CN113623894A (en) * | 2021-07-01 | 2021-11-09 | 华电电力科学研究院有限公司 | Multi-level waste heat recovery system for refrigeration of thermal power plant coupling data center and control method |
| CN115585441A (en) * | 2022-10-21 | 2023-01-10 | 中冶节能环保有限责任公司 | Waste heat resource recovery system based on steel slag rolling and hot stuffy process |
-
2022
- 2022-06-17 CN CN202210686374.8A patent/CN115200249A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103968598A (en) * | 2013-01-24 | 2014-08-06 | 盾安（天津）节能系统有限公司 | Large temperature difference centralized heating/cooling system |
| CN103277856A (en) * | 2013-05-28 | 2013-09-04 | 中国科学院广州能源研究所 | Solar seasonal cold and hot combined air conditioning system |
| CN103759354A (en) * | 2014-01-07 | 2014-04-30 | 广州万宝集团有限公司 | Solar drive two-stage lithium bromide refrigerating unit air conditioning system |
| CN103983042A (en) * | 2014-05-13 | 2014-08-13 | 陕西科技大学 | Solar indoor cold and hot integrated system |
| CN108930995A (en) * | 2018-08-01 | 2018-12-04 | 东北大学 | A kind of central heating system of solar energy and low-grade industrial exhaust heat united heat |
| CN109631402A (en) * | 2018-12-20 | 2019-04-16 | 大连民族大学 | The float glass waste-heat recovery device of lithium bromide heat pump heating |
| CN110455006A (en) * | 2019-08-06 | 2019-11-15 | 辽宁华融富瑞新能源科技股份有限公司 | It is a kind of metallurgy oxyen manutactory's waste heat recycling with energy cascade utilization coupled system |
| CN113623894A (en) * | 2021-07-01 | 2021-11-09 | 华电电力科学研究院有限公司 | Multi-level waste heat recovery system for refrigeration of thermal power plant coupling data center and control method |
| CN115585441A (en) * | 2022-10-21 | 2023-01-10 | 中冶节能环保有限责任公司 | Waste heat resource recovery system based on steel slag rolling and hot stuffy process |
Non-Patent Citations (1)
| Title |
|---|
| 项弸中，梁庆庆，张伟伟: "《暖通空调设计技术措施》", pages: 79 - 80 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203837171U (en) | Heat pump system for fan coil and heat recovery fresh-air conditioning unit | |
| CN201177332Y (en) | Double cold source heat pump centralized type air conditioner device possessing heat recovery and ice cold-storage function | |
| CN108834366B (en) | Air conditioning system of data machine room | |
| CN211792609U (en) | Indirect evaporative cooling air conditioning unit for data center | |
| CN101280941A (en) | Double-cold source heat pump centralized type air conditioner device | |
| CN206145846U (en) | Miniature central air conditioning of components of a whole that can function independently multiple and control system thereof | |
| CN111295084A (en) | Indirect evaporative cooling air conditioning unit using condenser and evaporator | |
| CN111023356A (en) | Cold accumulation air conditioning system and control method thereof | |
| CN208765140U (en) | A kind of refrigeration system of winter low energy consumption | |
| CN105241145A (en) | Control method of compensation type dual-source heat pump cold and hot water unit | |
| CN115200249A (en) | Lithium bromide system utilizing industrial waste heat and control method | |
| CN105318500A (en) | Building energy resource control and subentry metering system | |
| CN110806037B (en) | Multi-connected air conditioner hot water combined supply system and control method thereof | |
| CN210861782U (en) | Enhanced vapor injection triple co-generation system | |
| CN111347838B (en) | Waste heat recovery air treatment device | |
| CN209763405U (en) | Direct evaporative cooling and mechanical refrigeration combined air conditioning unit | |
| CN210463393U (en) | Indirect evaporative cooling and mechanical refrigeration combined air conditioning unit suitable for data center | |
| CN210042712U (en) | Centralized cooling type heat pipe air conditioner multi-split system | |
| CN201062899Y (en) | Waste heat recovery water-patching circulation type attached heat pump device | |
| CN110617591A (en) | Intelligent vortex injection energy-saving air conditioner | |
| CN219775899U (en) | cooling unit | |
| CN215908036U (en) | Gas circuit connection structure for quick start of refrigeration compressor at low temperature | |
| CN211424592U (en) | Cold-storage air conditioning system | |
| CN117190530B (en) | Magnetic suspension centrifugal heat source tower cold and heat source system and application method thereof | |
| CN219976602U (en) | Water-cooling multi-connected air conditioning system for subway station |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |