CN114941959B - Waste heat island system based on wheel hub production line - Google Patents
Waste heat island system based on wheel hub production line Download PDFInfo
- Publication number
- CN114941959B CN114941959B CN202210856211.XA CN202210856211A CN114941959B CN 114941959 B CN114941959 B CN 114941959B CN 202210856211 A CN202210856211 A CN 202210856211A CN 114941959 B CN114941959 B CN 114941959B
- Authority
- CN
- China
- Prior art keywords
- waste heat
- temperature
- low
- temperature waste
- heat utilization
- 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.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/058—Bearings magnetic; electromagnetic
-
- 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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention provides a waste heat island system based on a hub production line.A high-temperature waste heat recovery device in the system is used for recovering high-temperature waste heat and respectively transmitting the recovered high-temperature waste heat energy to a coating preheating plate exchanging device, a machine-added cleaning plate exchanging device and an auxiliary heat utilization facility; the medium-temperature waste heat recovery equipment is used for recovering medium-temperature waste heat and respectively transmitting the recovered medium-temperature waste heat energy to the mechanical cleaning plate and the auxiliary heat utilization facility; the primary low-grade waste heat utilization unit is used for improving low-temperature waste heat energy recovered by the low-temperature waste heat recovery equipment and respectively transmitting the low-temperature waste heat energy to the mechanical cleaning plate and the auxiliary heat utilization facility; the coating preheating plate replacing, the machine-added cleaning plate replacing and the auxiliary heat using facilities are respectively used for heating the coating process preheating, the machine-added cleaning and the auxiliary heat using facilities. The invention can recover the high, medium and low temperature waste heat of the hub production line, and is used for downstream process and auxiliary heat utilization, thereby achieving the purpose of energy recovery and reutilization.
Description
Technical Field
The invention relates to the technical field of waste heat recovery of a hub production line, in particular to a waste heat island system based on the hub production line.
Background
The sustainable development way of saving energy and developing circular economy becomes a necessary choice for enterprise development.
A large amount of waste heat energy can be generated in the production process of the automobile hub, and in order to achieve the purposes of energy conservation and emission reduction, the waste heat generated in the production process is required to be recovered through a series of industrial equipment and intelligent technical means by combining a production process to form a waste heat 'heat island' of a hub production line, and the waste heat energy of the heat island is used for a downstream process.
Disclosure of Invention
The invention aims to solve the technical problem of providing a waste heat island system based on a hub production line aiming at the defects of the prior art, which effectively collects high, medium and low temperature waste heat of the hub production line and is used for other heat-requiring processes of hub production, thereby achieving the purposes of energy reuse, cost reduction and efficiency improvement.
In order to solve the above technical problems, the present invention comprises:
a waste heat island system based on a hub production line comprises a high-temperature waste heat recovery device, a medium-temperature waste heat recovery device, a low-temperature waste heat recovery device, a coating preheating plate exchanger, a machine-mounted cleaning plate exchanger, an auxiliary heat utilization facility, a primary low-grade waste heat utilization unit and a cold-demand process plate exchanger; the high-temperature waste heat recovery equipment is used for recovering high-temperature flue gas waste heat of a smelting furnace in a hub production line, and respectively transmitting the recovered high-temperature waste heat energy to a coating preheating plate replacing facility, a machine-added cleaning plate replacing facility and an auxiliary heat utilization facility; the medium-temperature waste heat recovery equipment is used for recovering medium-temperature waste heat generated by a quenching tank in a hub production line and respectively transmitting recovered medium-temperature waste heat energy to a mechanical cleaning plate and an auxiliary heat utilization facility; the low-temperature waste heat recovery device is used for recovering low-temperature waste heat of a hollow press, a hydraulic station, a die casting machine and a die in a hub production line, and the primary low-grade waste heat utilization unit is used for improving low-temperature waste heat energy recovered by the low-temperature waste heat recovery device and respectively transmitting the low-temperature waste heat energy to a mechanical cleaning plate for replacement and an auxiliary heat utilization facility; cold water generated by the primary low-grade waste heat utilization unit in the lifting process is transferred to a process plate needing to be cooled for replacement; the coating preheating plate replacing, the machine-added cleaning plate replacing and the auxiliary heat facility are respectively used for heating the coating process preheating, the machine-added cleaning and the auxiliary heat facility, and the cold process plate replacing is used for refrigerating the cold process in the hub production line.
Further, the system also comprises a circulating main pipeline; the circulating main pipeline is used for respectively supplementing water to the high-temperature waste heat recovery equipment, the medium-temperature waste heat recovery equipment and the low-temperature waste heat recovery equipment, and is used for draining water for coating preheating plate exchange, machine-added cleaning plate exchange, auxiliary heat utilization facilities and a first-level low-grade waste heat utilization unit.
Further, the high-temperature waste heat recovery device comprises a flue gas heat exchanger for exchanging out the high-temperature flue gas waste heat of the smelting furnace and a high-temperature waste heat water tank for storing the high-temperature hot water after absorbing the high-temperature flue gas waste heat; the high-temperature waste heat water tank is provided with two high-temperature pipelines for transferring heat energy, and the two high-temperature pipelines are provided with a circulating water pump and an electromagnetic water valve; one high-temperature pipeline is connected with a hot water inlet of the coating preheating plate exchanger, and the other high-temperature pipeline is simultaneously connected with a hot water inlet of the machine-mounted cleaning plate exchanger and the auxiliary heat utilization facility; and an electromagnetic water valve is arranged on a pipeline connected between the machine cleaning plate and a hot water inlet of the auxiliary heat utilization facility.
Further, the medium-temperature waste heat recovery device comprises a quenching tank heat exchanger for exchanging out medium-temperature waste heat generated by the quenching tank and a medium-temperature waste heat water tank for storing medium-temperature hot water after absorbing the waste heat of the quenching tank; the medium-temperature waste heat water tank is provided with a medium-temperature pipeline for transferring heat energy, a circulating water pump and an electromagnetic water valve are arranged on the medium-temperature pipeline, and the medium-temperature pipeline is simultaneously connected with a hot water inlet of an auxiliary heat utilization facility for replacing and replacing the mechanical cleaning plate.
Further, the low-temperature waste heat recovery device comprises a low-temperature waste heat water tank for recovering low-temperature waste heat of an air compressor, a hydraulic station, a die casting machine and a die; the low-temperature waste heat water tank is provided with a first low-temperature pipeline for transferring heat energy, the first low-temperature pipeline is provided with a circulating water pump and an electromagnetic water valve, and the first low-temperature pipeline is communicated with the one-level low-grade waste heat utilization unit.
Further, the primary low-grade waste heat utilization unit comprises an evaporator, a condenser and a core compressor which are connected in sequence; the first low-temperature pipeline is connected with a hot water inlet of an evaporator of the first-stage low-grade waste heat utilization unit, a condenser of the first-stage low-grade waste heat utilization unit is provided with a second low-temperature pipeline for transferring heat energy, a circulating water pump is arranged on the second low-temperature pipeline, and the second low-temperature pipeline is simultaneously connected with a hot water inlet of an auxiliary heat utilization facility for exchanging and replacing a mechanical cleaning plate; and a cold water outlet of an evaporator of the primary low-grade waste heat utilization unit is connected with a cold water inlet of the process plate needing cooling through a first cold water pipeline.
Further, the system also comprises a secondary low-grade waste heat utilization unit cascaded with the primary low-grade waste heat utilization unit; the secondary low-grade waste heat utilization unit comprises an evaporator, a condenser and a core compressor which are connected in sequence; a cold water outlet of an evaporator of the primary low-grade waste heat utilization unit is connected with a hot water inlet of an evaporator of the secondary low-grade waste heat utilization unit through a first cold water pipeline, and a cold water outlet of an evaporator of the secondary low-grade waste heat utilization unit is connected with a cold water inlet of a cold process plate to be cooled through a second cold water pipeline; the condenser of the secondary low-grade waste heat utilization unit is provided with a third low-temperature pipeline for transferring heat energy, a circulating water pump is arranged on the third low-temperature pipeline, and the third low-temperature pipeline is connected with a hot water inlet of an auxiliary heat utilization facility.
Furthermore, the core compressors of the first-stage low-grade waste heat utilization unit and the second-stage low-grade waste heat utilization unit are centrifugal compressors; the centrifugal compressor comprises a rotating shaft, a centrifugal impeller is welded in the middle of the rotating shaft, and two ends of the rotating shaft are connected with a shell of the primary low-grade waste heat utilization unit or the secondary low-grade waste heat utilization unit through magnetic suspension bearings; two permanent magnet synchronous motors are symmetrically and fixedly installed at two ends of the rotating shaft and comprise a stator fixed on a shell of the primary low-grade waste heat utilization unit or the secondary low-grade waste heat utilization unit and a rotor located inside the stator and fixed on the rotating shaft.
The invention has the beneficial effects that:
the waste heat island system can recover high, medium and low temperature waste heat of a hub production line, and is used for downstream processes and auxiliary heat utilization, so that the purpose of energy recovery and reutilization is achieved. The core compressor of the low-grade waste heat utilization unit adopts a centrifugal compressor based on a magnetic suspension technology, a centrifugal impeller is placed in the middle of a rotating shaft, and magnetic suspension bearings and a permanent magnet motor body are symmetrically arranged, so that the purposes of high operation efficiency and good balance can be achieved.
Drawings
FIG. 1 is a system block diagram of the present invention;
FIG. 2 is a control flow diagram of the present invention;
FIG. 3 is a waste heat utilization logic control diagram of the present invention;
FIG. 4 is a schematic view of the overall construction of the centrifugal compressor of the present invention;
FIG. 5 is an exploded view of the centrifugal compressor of the present invention;
FIG. 6 is a schematic view of the construction of the rotating shaft of the present invention;
FIG. 7 is a schematic view of a rotor structure of a PMSM according to the present invention;
FIG. 8 is a schematic view of the lock nut of the present invention;
FIG. 9 is a schematic view of the anti-loosening ring of the present invention;
in the figure: 1. the device comprises a coating preheating plate exchanger, 2, an electromagnetic water valve, 3, a machine cleaning plate exchanger, 4, an auxiliary heat utilization facility, 5, a primary low-grade waste heat utilization unit, 6 a secondary low-grade waste heat utilization unit, 6-1, a centrifugal compressor, 6-1-1, a magnetic suspension bearing, 6-1-2, a locking ring, 6-1-3, a stator, 6-1-4, a rotating shaft, 6-1-5, a locking nut, 6-1-6, a rotor, 6-1-7, an inner hexagon screw, 6-1-2-1, a countersunk hole, 6-1-2-2, a locking boss, 6-1-4-1, a guide groove, 6-1-4-2, a centrifugal impeller, 6-1-4-3, a stepped platform, 6-1-4-4, a rotating shaft thread, 6-1-5-1, an internal thread, 6-1-5-2, a threaded hole, 6-1-6-1, a rotor boss, 6-1-6-2, a permanent magnet, 7, a low-temperature cleaning plate exchanger, 4, a high-temperature waste heat recovery process equipment, a high-temperature water pump, 11, a high-temperature waste heat recovery equipment, 11, a high-temperature water pump, and a high-temperature waste heat recovery process equipment.
Detailed Description
For the purpose of promoting an understanding of the invention, reference will now be made in detail to the present embodiments of the invention, examples of which are illustrated in the accompanying drawings. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitation of the present invention.
The invention provides a waste heat island heat supply method based on a hub production line, which comprises the following processes:
recovering high-temperature flue gas waste heat of a smelting furnace in a hub production line, recovering medium-temperature waste heat generated by a quenching tank in the hub production line, and recovering low-temperature waste heat of a hollow press, a hydraulic station, a die casting machine and a die in the hub production line to respectively obtain high-temperature waste heat energy, medium-temperature waste heat energy and low-temperature waste heat energy; step heat supply is carried out according to the preset priority: the high-temperature waste heat energy sources preferentially supply heat for coating pretreatment, the heat for coating pretreatment is only supplied by the high-temperature waste heat energy sources, if the high-temperature heat is surplus, the surplus high-temperature waste heat supply machine is used for supplying cleaning and auxiliary heat, and the cleaning and auxiliary heat facilities can be supplied by the high-temperature waste heat energy sources, the medium-temperature waste heat energy sources and the low-temperature waste heat energy sources; after the high-temperature waste heat energy meets the requirement of heat supply of coating pretreatment, the high-temperature waste heat energy and the medium-temperature and low-temperature waste heat energy simultaneously supply heat for cleaning the machine; if the machine heating and cleaning supply is sufficient, the high, medium and low temperature waste heat energy supplies heat to the auxiliary heat utilization facility.
The temperature of the low-temperature waste heat energy is increased by adopting an evaporation condensation method, and then the low-temperature waste heat energy is supplied to a machine heating cleaning or auxiliary heat utilization facility; and (4) supplying cold water produced in the heat extraction process for refrigeration of a cold-requiring process in a hub production line.
As shown in fig. 1, the invention provides a waste heat island system based on a hub production line, which comprises a high-temperature waste heat recovery device 11, a medium-temperature waste heat recovery device 9, a low-temperature waste heat recovery device 8, a coating preheating plate exchanger 1, a machine cleaning plate exchanger 3, an auxiliary heat utilization facility 4, a primary low-grade waste heat utilization unit 5 and a cold-demand process plate exchanger 7; the high-temperature waste heat recovery equipment 11 is used for recovering high-temperature flue gas waste heat of a smelting furnace in a hub production line, and respectively transmitting the recovered high-temperature waste heat energy to the coating preheating plate exchanger 1, the machine-added cleaning plate exchanger 3 and the auxiliary heat utilization facility 4; the intermediate-temperature waste heat recovery device 9 is used for recovering intermediate-temperature waste heat generated by a quenching tank in a hub production line, and respectively transmitting recovered intermediate-temperature waste heat energy to the mechanical cleaning plate exchanger 3 and the auxiliary heat utilization facility 4; the low-temperature waste heat recovery device 8 is used for recovering low-temperature waste heat of a hollow press, a hydraulic station, a die casting machine and a die in a hub production line, the primary low-grade waste heat utilization unit 5 is used for promoting low-temperature waste heat energy recovered by the low-temperature waste heat recovery device 8 and respectively transmitting the low-temperature waste heat energy to the machining cleaning plate exchanger 3 and the auxiliary heat utilization facility 4, and cold water generated by the primary low-grade waste heat utilization unit 5 in the promotion process is transmitted to the cold-needing process plate exchanger 7; the coating preheating plate exchanger 1, the machine-added cleaning plate exchanger 3 and the auxiliary heat facility 4 are respectively used for preheating of a coating process, machine-added cleaning and heat supply of the auxiliary heat facility, and the cold-needed process plate exchanger 7 is used for refrigerating of a cold-needed process in a hub production line.
The system also includes a circulation main conduit; and the circulating main pipeline is used for respectively supplementing water to the high-temperature waste heat recovery equipment 11, the medium-temperature waste heat recovery equipment 9 and the low-temperature waste heat recovery equipment 8, and is used for draining water for the coating preheating plate exchange 1, the machine-added cleaning plate exchange 3, the auxiliary heat utilization facility 4 and the primary low-grade waste heat utilization unit 5.
The high-temperature waste heat recovery device 11 comprises a flue gas heat exchanger for exchanging out the high-temperature flue gas waste heat of the smelting furnace and a high-temperature waste heat water tank for storing the high-temperature hot water absorbed with the high-temperature flue gas waste heat; a water inlet pipeline of the high-temperature waste heat water tank is connected with a circulating main pipeline, the high-temperature waste heat water tank is provided with two high-temperature pipelines for transferring heat energy, and the two high-temperature pipelines are both provided with a circulating water pump 10 and an electromagnetic water valve 2; one high-temperature pipeline is connected with a hot water inlet of the coating preheating plate exchanger 1, and the other high-temperature pipeline is simultaneously connected with a hot water inlet of the machine-added cleaning plate exchanger 3 and a hot water inlet of the auxiliary heat utilization facility 4; the coating preheating plate exchanger 1, the machine-added cleaning plate exchanger 3 and the cold water outlet of the auxiliary heat-using facility 4 are respectively connected with a circulating main pipeline through a water discharging pipe, and the water discharging pipes are respectively provided with an electromagnetic water valve 2. An electromagnetic water valve 2 is arranged on a pipeline connected between the machine cleaning plate 3 and a hot water inlet of the auxiliary heat utilization facility 4.
The medium-temperature waste heat recovery device 9 comprises a quenching tank heat exchanger for exchanging out medium-temperature waste heat generated by the quenching tank and a medium-temperature waste heat water tank for storing medium-temperature hot water after absorbing the waste heat of the quenching tank; the water inlet pipeline of the medium-temperature waste heat water tank is connected with the circulating main pipeline, the medium-temperature waste heat water tank is provided with a medium-temperature pipeline used for transferring heat energy, a circulating water pump 10 and an electromagnetic water valve 2 are arranged on the medium-temperature pipeline, and the medium-temperature pipeline is simultaneously connected with a machine cleaning plate 3 and a hot water inlet of an auxiliary heat utilization facility 4.
The low-temperature waste heat recovery device 8 comprises a low-temperature waste heat water tank for recovering low-temperature waste heat of an air compressor, a hydraulic station, a die casting machine and a die; the water inlet pipeline of the low-temperature waste heat water tank is connected with the circulating main pipeline, the low-temperature waste heat water tank is provided with a first low-temperature pipeline used for transferring heat energy, a circulating water pump 10 and an electromagnetic water valve 2 are arranged on the first low-temperature pipeline, and the first low-temperature pipeline is communicated with a primary low-grade waste heat utilization unit 5.
The primary low-grade waste heat utilization unit 5 comprises an evaporator, a condenser and a core compressor which are connected in sequence; the first low-temperature pipeline is connected with a hot water inlet of an evaporator of the primary low-grade waste heat utilization unit 5, a condenser of the primary low-grade waste heat utilization unit 5 is provided with a second low-temperature pipeline for transferring heat energy, a circulating water pump 10 is arranged on the second low-temperature pipeline, and the second low-temperature pipeline is simultaneously connected with a machine-mounted cleaning plate 3 and a hot water inlet of an auxiliary heat utilization facility 4; a cold water outlet of an evaporator of the primary low-grade waste heat utilization unit 5 and a water inlet of a condenser are connected with a main circulating pipeline through branch pipelines; the cold water outlet of the evaporator of the first-stage low-grade waste heat utilization unit 5 is connected with the cold water inlet of the cold process plate exchanger 7 through a first cold water pipeline, and the hot water outlet of the cold process plate exchanger 7 is connected with the main circulating pipeline through a branch pipeline.
The system also comprises a secondary low-grade waste heat utilization unit 6 cascaded with the primary low-grade waste heat utilization unit 5; the secondary low-grade waste heat utilization unit 6 comprises an evaporator, a condenser and a core compressor which are connected in sequence; the cold water outlet of the evaporator of the primary low-grade waste heat utilization unit 5 is connected with the hot water inlet of the evaporator of the secondary low-grade waste heat utilization unit 6 through a first cold water pipeline, and the cold water outlet of the evaporator of the secondary low-grade waste heat utilization unit 6 is connected with the cold water inlet of the cold process plate exchanger 7 through a second cold water pipeline. The condenser of the secondary low-grade waste heat utilization unit 6 is provided with a third low-temperature pipeline for transferring heat energy, a circulating water pump 10 is arranged on the third low-temperature pipeline, and the third low-temperature pipeline is connected with a hot water inlet of the auxiliary heat utilization facility 4.
After the primary low-grade waste heat utilization unit 5 extracts low-grade waste heat, produced cold water is conveyed to a cold-requiring process plate 7 for refrigeration of the cold-requiring process in a hub production line. If the temperature of the cold water cannot meet the process requirements, the secondary low-grade waste heat utilization unit 6 is used for continuously heating, and the produced ultralow-temperature cold water is used for the cold-on-demand process. The temperature of the heat extracted by the secondary low-grade waste heat utilization unit 6 is low, and the heat is only supplied to the auxiliary heat utilization facility 4.
The low-grade waste heat utilization unit consists of a permanent magnet synchronous motor, a compressor, a condenser, a throttle valve, an evaporator and a liquid separating (storing) device. The bearing of the core compressor adopts a magnetic suspension bearing and is driven by the permanent magnet synchronous motor, the design can realize high-speed operation of the compressor, the heat extraction efficiency is high, and the energy conservation is remarkable. Meanwhile, the heat island control module can perform stepless speed regulation on the permanent magnet synchronous motor and control the heat extraction amount of the low-grade waste heat utilization unit in real time.
The heat island management and control module preferentially utilizes high-temperature waste heat and medium-temperature waste heat, the system automatically calculates the heat demand, and when the heat demand is larger than the high-medium-temperature heat production quantity, the low-grade waste heat utilization unit is controlled to be started and the rotating speed of the low-grade waste heat utilization unit is controlled according to the heat demand, so that the balance of heat supply and demand is achieved, and the waste of electric energy caused by full-speed operation of the low-grade waste heat utilization unit is avoided. When the medium-high temperature waste heat is sufficient, the rotating speed of the permanent magnet synchronous motor can be reduced, and the heat extraction amount of the low-grade waste heat utilization unit is reduced; when the middle-high temperature waste heat is insufficient, the rotating speed of the permanent magnet synchronous motor can be increased, the heat extraction amount of the low-grade waste heat utilization unit is increased, the balance of heat supply and demand is realized, and the energy conservation and emission reduction are realized to the maximum extent.
As shown in fig. 2, which is a control flow chart of the invention, high-temperature flue gas (300 ℃) of an aluminum ingot smelting furnace in a hub production line is used for exchanging high-temperature waste heat by using a flue gas heat exchanger, and high-temperature hot water after absorbing the waste heat is sent to a high-temperature waste heat water tank for energy storage by using a high-temperature circulating water pump; aiming at the medium-temperature quenching heat energy (80 ℃) of the casting quenching tank heat treatment process, the heat exchanger of the quenching tank is utilized to exchange the medium-temperature waste heat, and the medium-temperature hot water after absorbing the waste heat of the quenching tank is driven by a circulating water pump to be sent to a medium-temperature waste heat water tank for energy storage. The low-temperature water of a hub process die, a die casting station, a hydraulic station and an air compression station is sent to a two-stage low-grade waste heat utilization unit by utilizing the driving of a circulating water pump, a low-temperature heat source and a low-temperature cold source are generated by a method of raising heat and reducing circulating water temperature, medium-temperature hot water (60 to 70 ℃) is prepared, and meanwhile, ultralow-temperature cold water (as low as 12 ℃) can be produced by the two-stage low-grade waste heat utilization unit. High-temperature waste heat energy (high-temperature hot water) passes through a high-temperature pipeline and is driven by a circulating water pump to supply heat to a coating preheating pretreatment, machining cleaning and auxiliary heat utilization facility; the medium-temperature residual heat energy (medium-temperature hot water) supplies heat to the mechanical cleaning and auxiliary heat facilities through the medium-temperature pipeline and is driven by the circulating water pump, and the low-temperature residual heat energy (low-temperature hot water) supplies heat to the mechanical cleaning and auxiliary heat facilities through the low-temperature pipeline.
The whole waste heat energy source distribution process is heated by the heat island control module according to the preset priority level ladder. The high-temperature waste heat is preferentially supplied for coating pretreatment, the coating preheating temperature is high and can be supplied only by the high-temperature waste heat, and if the heat is not supplied enough, a heat supply boiler is started for heat supplement; if the heat is surplus, the surplus high-temperature waste heat supply machine is used for supplying cleaning and auxiliary heat. The mechanical cleaning and auxiliary heat can be supplied by high, medium and low temperature waste heat. After the high-temperature waste heat meets the requirement of heat supply of coating pretreatment, cleaning and heat supply are simultaneously added to the machine together with the medium-temperature and low-temperature waste heat, and if the supply of the cleaning heat of the machine is insufficient, a heat supply boiler is started for heat supplement; if the machine is sufficiently cleaned, the high, medium and low temperature waste heat supplies heat to the auxiliary heat utilization facility. And if the heat supply quantity does not meet the heat consumption of the auxiliary heat consumption facility, starting the heat supply boiler for heat supplement.
The low-temperature cold water generated by the low-grade waste heat utilization system is used as a cold source of a process needing cooling, such as a refrigeration air conditioner and the like, and cooling water of working procedures and equipment, such as a smelting furnace, a quenching tank, a mold, a casting machine, an air compressor and the like, and absorbs heat of the process equipment so as to achieve the purposes of energy conservation, temperature reduction and waste heat recollection.
Fig. 3 shows a control diagram of the waste heat utilization logic of the present invention. The heat island control module controls high, medium and low temperature heat supply to be started simultaneously, heat can be supplied only by high temperature waste heat due to high heat supply temperature of coating pretreatment, and heat is supplemented by a heat-producing boiler if the high temperature heat supply cannot meet the heat demand of the coating pretreatment; and if the high-temperature heat supply completely meets the heat requirement of the coating pretreatment, the high-temperature heat supply, the medium-temperature waste heat and the low-temperature waste heat supply heat to the mechanical cleaning process together. If the medium-high and low-temperature waste heat does not meet the heat requirement of the machining cleaning process, the heat supply of a heat-producing boiler is needed; if the middle-high temperature and low-temperature waste heat completely meets the heat demand of the mechanical cleaning process, heat is continuously supplied to auxiliary heat utilization facilities including factory heating, factory hot water and the like. If the high, medium and low temperature can not meet the heat supply requirement of the auxiliary heat utilization facility, the boiler is still required to supplement heat. The primary low-grade waste heat utilization unit 5 can also generate low-temperature cold water for cooling processes, including cooling for refrigeration and air conditioning, cooling process equipment and the like, in the heat supply process. If the cooling capacity of the primary low-grade waste heat utilization unit 5 cannot meet the temperature of the cooling process, the secondary low-grade waste heat utilization unit 6 needs to be started to carry out secondary heat extraction on cooling water to generate ultralow-temperature cold water, and the heat extraction capacity is directly used for auxiliary heat utilization facility heat supply.
The core compressors of the first-stage low-grade waste heat utilization unit 5 and the second-stage low-grade waste heat utilization unit 6 are centrifugal compressors 6-1.
As shown in fig. 4 to 9, the centrifugal compressor 6-1 comprises a rotating shaft 6-1-4 with a centrifugal impeller 6-1-4-2 welded in the middle, and both ends of the rotating shaft 6-1-4 are connected with the shell of the first-stage low-grade waste heat utilization unit 5 or the second-stage low-grade waste heat utilization unit 6 through magnetic suspension bearings 6-1-1; two ends of the rotating shaft 6-1-4 are respectively and fixedly provided with a step platform 6-1-4-3, the step platforms 6-1-4-3 are fixedly assembled in the inner ring of the magnetic suspension bearing 6-1-1, and the outer ring of the magnetic suspension bearing 6-1-1 is fixed on the shell of the primary low-grade waste heat utilization unit 5 or the secondary low-grade waste heat utilization unit 6. The two magnetic suspension bearings 6-1-1 act on the step platforms 6-1-4-3 at the two ends of the rotating shaft 6-1-4 through electromagnetic force to support the whole rotating shaft 6-1-4, and meanwhile, the electromagnetic force can limit the axial direction movement of the rotating shaft 6-1-4.
The rotating shaft 6-1-4 is made of stainless steel and permanent magnetic materials, wherein the step 6-1-4-3 is made of the permanent magnetic materials, and the rest is made of the stainless steel.
Two permanent magnet synchronous motors are symmetrically and fixedly installed at two ends of the rotating shaft 6-1-4, each permanent magnet synchronous motor comprises a stator 6-1-3 and a rotor 6-1-6, each stator 6-1-3 is composed of a silicon steel sheet and a coil, each stator 6-1-3 is fixed on a shell of the primary low-grade waste heat utilization unit 5 or the secondary low-grade waste heat utilization unit 6, and each rotor 6-1-6 is located inside each stator 6-1-3 and fixed on the rotating shaft 6-1-4.
The centrifugal compressor 6-1 adopts two permanent magnet synchronous motors which are symmetrically arranged on the rotating shaft 6-1-4, and can ensure that the centrifugal impeller 6-1-4-2 is always in a stress balance state when rotating at high speed.
The installation mode of the permanent magnet synchronous motor on the rotating shaft 6-1-4 is as follows: two ends of the rotating shaft 6-1-4 are respectively provided with a guide groove 6-1-4-1 along the axial direction, and the guide grooves 6-1-4-1 at each end are uniformly arranged along the circumferential direction;
the rotor 6-1-6 is in a hollow cylinder shape, a plurality of permanent magnets 6-1-6-2 are uniformly adhered to the outer wall of the rotor along the circumferential direction, a plurality of rotor bosses 6-1-6-1 are uniformly and fixedly arranged on the inner wall of the rotor along the circumferential direction, the rotor bosses 6-1-6-1 are matched with the guide grooves 6-1-4-1, and the length of the guide grooves 6-1-4-1 is slightly larger than that of the rotor bosses 6-1-6-1. The rotor 6-1-6 is arranged on the rotating shaft 6-1-4 through the matching of the rotor boss 6-1-6-1 and the guide groove 6-1-4-1 and synchronously rotates along with the rotating shaft 6-1-4.
The shoulder side of the guide groove 6-1-4-1 on the rotating shaft 6-1-4 is provided with a rotating shaft thread 6-1-4-4, after the two rotors 6-1-6 are respectively arranged at the two ends of the rotating shaft 6-1-4, the two ends of the rotating shaft 6-1-4 are respectively provided with a locking nut 6-1-5, and the rotors 6-1-6 and the rotating shaft 6-1-4 are fixed together. The locking nuts 6-1-5 are arranged at the two ends of the rotating shaft 6-1-4 through internal threads 6-1-5-1 matched with the rotating shaft threads 6-1-4-4 to axially lock the rotor 6-1-6.
In order to prevent the locking nut 6-1-5 from loosening, an anti-loosening ring 6-1-2 is also arranged at the outer end of the locking nut 6-1-5. The inner wall of the anti-loosening ring 6-1-2 is uniformly and fixedly provided with a plurality of anti-loosening bosses 6-1-2-2, the anti-loosening bosses 6-1-2-2 are also matched with the guide grooves 6-1-4-1, the anti-loosening ring 6-1-2 is arranged at two ends of the rotating shaft 6-1-4 by matching the anti-loosening bosses 6-1-2-2 with the guide grooves 6-1-4-1, a plurality of countersunk holes 6-1-2-1 are uniformly formed in the anti-loosening ring 6-1-2, a plurality of threaded holes 6-1-5-2 are uniformly formed in the locking nut 6-1-5, and the anti-loosening ring 6-1-2 and the locking nut 6-1-5 are fixedly connected together by utilizing the inner hexagonal screws 6-1-7 to penetrate through the countersunk holes 6-1-2-1 and screwed into the threaded holes 6-1-5-2, so that the locking nut 6-1-5 is prevented from rotating along the axial direction, and the locking nut 6-1-5 is effectively prevented from loosening.
The heat extraction amount (refrigerating capacity) of the first-stage low-grade waste heat utilization unit 5 and the second-stage low-grade waste heat utilization unit 6 changes along with the rotating speed of the rotating shaft 6-1-4, the control system monitors the heat extraction amount (refrigerating capacity) of the two low-grade waste heat utilization units through a temperature sensor, and if the temperature is lower than (higher than) the required heat extraction amount (refrigerating capacity), the rotating speed of the centrifugal compressor 6-1 is controlled to be increased, and the heat extraction amount (refrigerating capacity) is increased; if the heating temperature is too high (the refrigerating temperature is too low) and exceeds the set value of the equipment, the rotating speed of the centrifugal compressor 6-1 is controlled to be reduced, and the overload operation of the equipment is prevented.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a waste heat island system based on wheel hub produces line which characterized in that: the system comprises a high-temperature waste heat recovery device (11), a medium-temperature waste heat recovery device (9), a low-temperature waste heat recovery device (8), a coating preheating plate exchanger (1), a machine-added cleaning plate exchanger (3), an auxiliary heat utilization facility (4), a primary low-grade waste heat utilization unit (5) and a cold-required process plate exchanger (7);
the high-temperature waste heat recovery equipment (11) is used for recovering high-temperature flue gas waste heat of a smelting furnace in a hub production line, and respectively transmitting the recovered high-temperature waste heat energy to the coating preheating plate exchanger (1), the machine-added cleaning plate exchanger (3) and the auxiliary heat utilization facility (4);
the medium-temperature waste heat recovery equipment (9) is used for recovering medium-temperature waste heat generated by a quenching tank in a hub production line, and respectively transmitting recovered medium-temperature waste heat energy to the mechanical cleaning plate exchanger (3) and the auxiliary heat utilization facility (4);
the low-temperature waste heat recovery device (8) is used for recovering low-temperature waste heat of a hollow press, a hydraulic station, a die casting machine and a die in a hub production line, and the primary low-grade waste heat utilization unit (5) is used for promoting low-temperature waste heat energy recovered by the low-temperature waste heat recovery device (8) and respectively transmitting the low-temperature waste heat energy to the machining cleaning plate exchanger (3) and the auxiliary heat utilization facility (4); cold water generated by the primary low-grade waste heat utilization unit (5) in the lifting process is transferred to a process plate needing to be cooled to be replaced (7);
the coating preheating plate exchanger (1), the machine-added cleaning plate exchanger (3) and the auxiliary heat facility (4) are respectively used for preheating of a coating process, machine-added cleaning and heat supply of the auxiliary heat facility, and the cold-requiring process plate exchanger (7) is used for refrigerating a cold-requiring process in a hub production line;
the high-temperature waste heat recovery device (11) comprises a flue gas heat exchanger for exchanging out high-temperature flue gas waste heat of the smelting furnace and a high-temperature waste heat water tank for storing high-temperature hot water after absorbing the high-temperature flue gas waste heat; the high-temperature waste heat water tank is provided with two high-temperature pipelines for transferring heat energy, and the two high-temperature pipelines are provided with a circulating water pump (10) and an electromagnetic water valve (2); one high-temperature pipeline is connected with a hot water inlet of the coating preheating plate exchanger (1), and the other high-temperature pipeline is simultaneously connected with a hot water inlet of the machine-mounted cleaning plate exchanger (3) and a hot water inlet of the auxiliary heat utilization facility (4); an electromagnetic water valve (2) is arranged on a pipeline connected between the machine cleaning plate exchanger (3) and a hot water inlet of the auxiliary heat utilization facility (4);
the medium-temperature waste heat recovery device (9) comprises a quenching tank heat exchanger for exchanging medium-temperature waste heat generated by the quenching tank and a medium-temperature waste heat water tank for storing medium-temperature hot water after absorbing the waste heat of the quenching tank; the medium-temperature waste heat water tank is provided with a medium-temperature pipeline for transferring heat energy, a circulating water pump (10) and an electromagnetic water valve (2) are arranged on the medium-temperature pipeline, and the medium-temperature pipeline is simultaneously connected with a hot water inlet of the mechanical cleaning plate exchanger (3) and an auxiliary heat utilization facility (4);
the low-temperature waste heat recovery device (8) comprises a low-temperature waste heat water tank for recovering low-temperature waste heat of an air compressor, a hydraulic station, a die casting machine and a die; the low-temperature waste heat water tank is provided with a first low-temperature pipeline for transferring heat energy, the first low-temperature pipeline is provided with a circulating water pump (10) and an electromagnetic water valve (2), and the first low-temperature pipeline is communicated with a primary low-grade waste heat utilization unit (5);
the primary low-grade waste heat utilization unit (5) comprises an evaporator, a condenser and a core compressor which are connected in sequence; the first low-temperature pipeline is connected with a hot water inlet of an evaporator of the first-stage low-grade waste heat utilization unit (5), a condenser of the first-stage low-grade waste heat utilization unit (5) is provided with a second low-temperature pipeline for transferring heat energy, a circulating water pump (10) is arranged on the second low-temperature pipeline, and the second low-temperature pipeline is simultaneously connected with a hot water inlet of the mechanical cleaning plate exchanger (3) and the auxiliary heat utilization facility (4); a cold water outlet of an evaporator of the primary low-grade waste heat utilization unit (5) is connected with a cold water inlet of the cold process plate exchanger (7) through a first cold water pipeline;
the waste heat island system based on the hub production line further comprises a secondary low-grade waste heat utilization unit (6) which is cascaded with the primary low-grade waste heat utilization unit (5); the secondary low-grade waste heat utilization unit (6) comprises an evaporator, a condenser and a core compressor which are connected in sequence; a cold water outlet of an evaporator of the primary low-grade waste heat utilization unit (5) is connected with a hot water inlet of an evaporator of the secondary low-grade waste heat utilization unit (6) through a first cold water pipeline, and a cold water outlet of the evaporator of the secondary low-grade waste heat utilization unit (6) is connected with a cold water inlet of a process plate (7) to be cooled through a second cold water pipeline; the condenser of the secondary low-grade waste heat utilization unit (6) is provided with a third low-temperature pipeline for transferring heat energy, a circulating water pump (10) is arranged on the third low-temperature pipeline, and the third low-temperature pipeline is connected with a hot water inlet of the auxiliary heat utilization facility (4).
2. The waste heat island system based on hub production line of claim 1, wherein: also comprises a circulating main pipeline; the circulating main pipeline is used for respectively supplementing water to the high-temperature waste heat recovery equipment (11), the medium-temperature waste heat recovery equipment (9) and the low-temperature waste heat recovery equipment (8) and draining water for the coating preheating plate exchanger (1), the machine-added cleaning plate exchanger (3), the auxiliary heat utilization facility (4) and the first-level low-grade waste heat utilization unit (5).
3. The waste heat island system based on a hub production line as claimed in claim 1, wherein: the core compressors of the first-stage low-grade waste heat utilization unit (5) and the second-stage low-grade waste heat utilization unit (6) are centrifugal compressors (6-1); the centrifugal compressor (6-1) comprises a rotating shaft (6-1-4) with a centrifugal impeller (6-1-4-2) welded in the middle, and two ends of the rotating shaft (6-1-4) are connected with a shell of a first-stage low-grade waste heat utilization unit (5) or a second-stage low-grade waste heat utilization unit (6) through magnetic suspension bearings (6-1-1); two permanent magnet synchronous motors are symmetrically and fixedly installed at two ends of the rotating shaft (6-1-4), and each permanent magnet synchronous motor comprises a stator (6-1-3) fixed on a shell of the primary low-grade waste heat utilization unit (5) or the secondary low-grade waste heat utilization unit (6) and a rotor (6-1-6) located inside the stator (6-1-3) and fixed on the rotating shaft (6-1-4).
4. The heat supply method of the waste heat island system based on the hub production line as claimed in claim 1, wherein the heat supply method comprises the following steps: the method comprises the following processes:
recovering high-temperature flue gas waste heat of a smelting furnace in a hub production line, recovering medium-temperature waste heat generated by a quenching tank in the hub production line, and recovering low-temperature waste heat of a hollow press, a hydraulic station, a die casting machine and a die in the hub production line to respectively obtain high-temperature waste heat energy, medium-temperature waste heat energy and low-temperature waste heat energy;
carrying out step heat supply according to a preset priority: the high-temperature waste heat energy sources preferentially supply heat for coating pretreatment, the heat for coating pretreatment is only supplied by the high-temperature waste heat energy sources, if the high-temperature heat is surplus, the surplus high-temperature waste heat supply machine is used for supplying cleaning and auxiliary heat, and the cleaning and auxiliary heat facilities can be supplied by the high-temperature waste heat energy sources, the medium-temperature waste heat energy sources and the low-temperature waste heat energy sources; after the high-temperature waste heat energy meets the requirement of heat supply of coating pretreatment, the high-temperature waste heat energy and the medium-temperature and low-temperature waste heat energy are simultaneously used for cleaning and supplying heat to the machine; if the machine heating and cleaning supply is sufficient, the high, medium and low temperature waste heat energy supplies heat to the auxiliary heat utilization facility.
5. The heat supply method of the waste heat island system based on the hub production line according to claim 4, wherein the heat supply method comprises the following steps: the temperature of the low-temperature waste heat energy is increased by adopting an evaporation condensation method, and then the low-temperature waste heat energy is supplied to a machine heating cleaning or auxiliary heat utilization facility; and (4) supplying cold water produced in the heat extraction process for refrigeration of a cold-requiring process in a hub production line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210856211.XA CN114941959B (en) | 2022-07-21 | 2022-07-21 | Waste heat island system based on wheel hub production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210856211.XA CN114941959B (en) | 2022-07-21 | 2022-07-21 | Waste heat island system based on wheel hub production line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114941959A CN114941959A (en) | 2022-08-26 |
| CN114941959B true CN114941959B (en) | 2022-10-04 |
Family
ID=82910515
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210856211.XA Active CN114941959B (en) | 2022-07-21 | 2022-07-21 | Waste heat island system based on wheel hub production line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114941959B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202254898U (en) * | 2011-10-11 | 2012-05-30 | 无锡市广运环保机械有限公司 | Metallurgical furnace high temperature alternating smoke multistage organic rankine cycle waste heat power generation special hardware |
| CN202470794U (en) * | 2012-03-08 | 2012-10-03 | 王正新 | Equipment special for waste heat cascade utilization and dust removal of high-temperature alternation fume of electric furnace |
| CN202643715U (en) * | 2012-07-03 | 2013-01-02 | 武汉钢铁(集团)公司 | Gas steam combined cycle power generation process waste heat utilization system |
| CN105318727A (en) * | 2014-07-30 | 2016-02-10 | 无锡市东优环保科技有限公司 | Method for utilizing residual heat of flue gas from metallurgical furnace |
| CN106813510A (en) * | 2017-02-08 | 2017-06-09 | 中冶华天工程技术有限公司 | A kind of heater for rolling steel afterheat utilizing system based on combustion air progressive solution |
| US20210225545A1 (en) * | 2017-12-06 | 2021-07-22 | Joint Stock Company "Rosenergoatom" | Radioactive Waste Recycling Plant |
-
2022
- 2022-07-21 CN CN202210856211.XA patent/CN114941959B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202254898U (en) * | 2011-10-11 | 2012-05-30 | 无锡市广运环保机械有限公司 | Metallurgical furnace high temperature alternating smoke multistage organic rankine cycle waste heat power generation special hardware |
| CN202470794U (en) * | 2012-03-08 | 2012-10-03 | 王正新 | Equipment special for waste heat cascade utilization and dust removal of high-temperature alternation fume of electric furnace |
| CN202643715U (en) * | 2012-07-03 | 2013-01-02 | 武汉钢铁(集团)公司 | Gas steam combined cycle power generation process waste heat utilization system |
| CN105318727A (en) * | 2014-07-30 | 2016-02-10 | 无锡市东优环保科技有限公司 | Method for utilizing residual heat of flue gas from metallurgical furnace |
| CN106813510A (en) * | 2017-02-08 | 2017-06-09 | 中冶华天工程技术有限公司 | A kind of heater for rolling steel afterheat utilizing system based on combustion air progressive solution |
| US20210225545A1 (en) * | 2017-12-06 | 2021-07-22 | Joint Stock Company "Rosenergoatom" | Radioactive Waste Recycling Plant |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114941959A (en) | 2022-08-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101334203B (en) | Method for enhancing cold-storage density of cold storage air conditioner system and cold storage air conditioner system | |
| CN201953611U (en) | Waste heat recovering device of water-cooled type air compressor | |
| CN107178934A (en) | A kind of residual heat of air compressor advanced recycling system | |
| CN104791925A (en) | Energy-saving type open cold supply system for cooling tower | |
| CN105135751A (en) | Heating, electricity and cooling combined supply system based on heat pump technology and air compression and electricity storage technology | |
| CN201095301Y (en) | Air-conditioner for vehicle | |
| CN114941959B (en) | Waste heat island system based on wheel hub production line | |
| CN115369195B (en) | Waste heat recovery system of blast furnace slag flushing water and working method thereof | |
| CN108301887B (en) | Combined cooling, heating and power generation and organic Rankine cycle combined system | |
| CN205001001U (en) | Natural valve station energy utilization system | |
| CN209840253U (en) | Heat pump system for power plant waste heat cold and hot coupling utilization | |
| CN210289855U (en) | Steam turbine lubricating oil quick auxiliary cooling device of steam power plant | |
| CN204438288U (en) | A kind of steam power plant cold source energy reclaims heating system | |
| CN111578555A (en) | Steam waste heat recovery compression refrigeration system and working method thereof | |
| CN219934158U (en) | Central air conditioning system | |
| CN217004438U (en) | Power plant external supply steam condensate return water waste heat recovery system | |
| CN220487733U (en) | Locomotive vehicle internal combustion engine waste heat power generation device | |
| CN219640475U (en) | Centrifugal air compression waste heat utilization system for pharmaceutical factory workshop | |
| CN217541121U (en) | Waste heat recovery comprehensive utilization device of air compressor unit | |
| CN213983527U (en) | Waste heat extraction system of gas turbine power plant | |
| CN217898118U (en) | Efficient combined heat exchange system for compressor unit | |
| CN212057449U (en) | Circulating water waste heat refrigerating and heating system | |
| CN116202128B (en) | Method for heating by utilizing compressed air energy storage compression heat waste heat | |
| CN219197657U (en) | Waste heat driven air compressor | |
| CN220471925U (en) | Hot water lithium bromide refrigerating device utilizing heat energy |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |