CN214407031U - Large temperature difference heat taking and releasing device for recovering coking waste heat - Google Patents
Large temperature difference heat taking and releasing device for recovering coking waste heat Download PDFInfo
- Publication number
- CN214407031U CN214407031U CN202120554551.8U CN202120554551U CN214407031U CN 214407031 U CN214407031 U CN 214407031U CN 202120554551 U CN202120554551 U CN 202120554551U CN 214407031 U CN214407031 U CN 214407031U
- Authority
- CN
- China
- Prior art keywords
- heat
- pipeline
- heat exchanger
- temperature
- pipe group
- 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
-
- 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
Landscapes
- Sorption Type Refrigeration Machines (AREA)
Abstract
The utility model provides a retrieve big difference in temperature of coking waste heat and get, heat release device, including first heat exchanger, second heat exchanger, third heat exchanger, fourth heat exchanger, fifth heat exchanger and central controller, first heat exchanger, second heat exchanger, third heat exchanger, fourth heat exchanger and fifth heat exchanger realize heat transfer, the operation of this device of central controller control through each tube coupling. The invention adopts the split layout of the heat taking device and the heat releasing device, the heat taking device is arranged in the coking plant, the ammonia water and the steam waste heat are recovered to the maximum extent in a two-stage series connection mode, and the temperature difference of the supplied and returned water is increased; the heat release device is arranged in a heat exchange station outside a coking plant, and the large temperature difference circulation of circulating water between the heat taking device and the heat release device is realized by arranging a large temperature difference absorption type heat exchange unit; and a multistage series and parallel heat-taking heat exchanger is arranged in the heat release device to realize the gradient and stable release of heat.
Description
Technical Field
The utility model relates to a retrieve big difference in temperature of coking waste heat and get, heat release device.
Background
Huge energy is discharged outwards in the coking and power generation processes of the coking plant. Taking a 120 ten thousand ton coke plant as an example, three temperature gradients of waste heat are mainly discharged: the temperature of cooling water in the cooling tower is 35-40 ℃, and the flow is about 4800m3H; the temperature of the circulating ammonia water is 80-85 ℃, and the flow rate is about 1500m3H; the steam temperature of the waste heat boiler is 140-150 ℃, and the flow rate is 15 t/h; the total exhaust waste heat is about 120 tons/h equivalent steam. On one hand, a large amount of waste heat is discharged outwards in the coking process of the coking plant, on the other hand, a large amount of energy needs to be consumed to supplement the heat for production and living in the internal and peripheral areas of the coking plant, and the development direction of clean heating, energy conservation, emission reduction, low carbon and green in the coking industry and northern areas is not met.
Chinese patent publication No. CN104034090A discloses a system for utilizing waste heat of circulating ammonia water. The circulating ammonia water heat exchanger and the heat pump unit are arranged, the circulating ammonia water waste heat is transferred into softened water through the circulating ammonia water heat exchanger, cold water or hot water is prepared through the double-effect absorption heat pump, and the purposes of preparing chilled water in summer and preparing medium-temperature water in winter in a coking plant are met. However, the above patent focuses on that the prepared cold water or hot water only serves the interior of the coking system, and the application range is limited. The main reasons are that: the core equipment is arranged in the coking plant, the temperature difference of softened water and supply return water is small, and the remote conveying condition is not provided; the absorption heat pump needs to be driven by steam, and no available air source is arranged outside; the heating part load needs to simultaneously adjust the recycling amount of the waste heat of the circulating ammonia water and the amount of the driving steam, and has poor flexibility and low efficiency.
Chinese patent No. CN210219960U discloses a coking primary cooling water waste heat utilization system. An absorption heat pump, a peak heater, a solar heat collector and a heat conduction oil heat exchanger are arranged in a coking plant, and steam generated by heating heat conduction oil by the solar heat collector drives the absorption heat pump to recover the waste heat of low-temperature water of a primary cooler, so that heating water is prepared and supplied for peripheral heating; when the solar energy is insufficient, the steam is adopted to drive the absorption heat pump. However, the above patent focuses on using solar energy to replace part of steam heat removal pump drive, and the waste heat recovery amount is small. The main reasons are that: the solar energy recovery amount is small, the steam is still a main heat source, and the coking residual heat recovery amount is small; the heat pump unit is positioned inside a coking plant, the temperature difference between heating water and return water is small, and the remote conveying condition is not provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a large temperature difference heat taking and releasing device for recovering coking waste heat, compared with the prior art, the utility model adopts the split layout of the heat taking device and the heat releasing device, the heat taking device is arranged inside a coking plant, ammonia water and steam waste heat are recovered to the maximum extent through a two-stage series connection mode, and the temperature difference of water supply and return is increased; the heat release device is arranged in a heat exchange station outside a coking plant, and the large temperature difference circulation of circulating water between the heat taking device and the heat release device is realized by arranging a large temperature difference absorption type heat exchange unit; and a multistage series and parallel heat-taking heat exchanger is arranged in the heat release device to realize the gradient and stable release of heat.
The utility model provides a technical scheme that its technical problem adopted is: a large-temperature-difference heat taking and releasing device for recovering coking waste heat and an operation control method are characterized by comprising a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a fifth heat exchanger and a central controller, heat-releasing circulation flow of high-temperature ammonia water in the first heat exchanger is achieved through an ammonia water circulation pipeline, heat-releasing circulation flow of high-temperature steam in the second heat exchanger is achieved through a steam circulation pipeline, heat in the first heat exchanger and the second heat exchanger is circularly transferred to the third heat exchanger, the fourth heat exchanger and the fifth heat exchanger through a first heat conveying pipeline, heat in the third heat exchanger and the fourth heat exchanger is circularly transferred to a first heating end through a second heat conveying pipeline, heat in the fifth heat exchanger is circularly transferred to a second heating end through the third heat conveying pipeline, and the central controller controls the ammonia water circulation pipeline, And operating the steam circulation pipeline, the first heat conveying pipeline, the second heat conveying pipeline and the third heat conveying pipeline.
Preferably, the third heat exchanger is a heat pump unit, and the heat pump unit includes a first heat-releasing pipe set, a second heat-releasing pipe set and a third heat-absorbing pipe set.
Further, the ammonia water circulating pipeline comprises a high-temperature ammonia water conveying pipeline, a first booster pump and a low-temperature ammonia water conveying pipeline, the high-temperature ammonia water conveying pipeline is communicated with the inlet end of the ammonia water heat release pipe group in the first heat exchanger, the low-temperature ammonia water conveying pipeline is communicated with the outlet end of the ammonia water heat release pipe group in the first heat exchanger, a first bypass pipeline is connected in series between the high-temperature ammonia water conveying pipeline and the low-temperature ammonia water conveying pipeline, a first electric switch valve is connected on the first bypass pipeline in series, a first booster pump is connected on the high-temperature ammonia water conveying pipeline in series, and the first booster pump is positioned at the downstream of the joint of the first bypass pipeline and the high-temperature ammonia water conveying pipeline, a first pressure sensor is arranged on the high-temperature ammonia water conveying pipeline, and a second pressure sensor and a first temperature sensor are arranged on the low-temperature ammonia water conveying pipeline; the steam circulation pipeline comprises a high-temperature steam conveying pipeline and a steam condensate conveying pipeline, the high-temperature steam conveying pipeline is communicated with the inlet end of a steam heat-releasing pipe group in the second heat exchanger, the steam condensate conveying pipeline is communicated with the outlet end of the steam heat-releasing pipe group, and a first regulating valve is connected to the high-temperature steam conveying pipeline in series; the first heat conveying pipeline comprises a first conveying pipeline, a first heat absorption pipe group in the first heat exchanger, a second heat absorption pipe group in the second heat exchanger, a first heat release pipe group, a third heat release pipe group in the fourth heat exchanger, a second heat release pipe group and a fourth heat release pipe group in the fifth heat exchanger are sequentially connected in series through a plurality of first conveying pipelines, a second bypass pipeline is connected in series between the first conveying pipeline on the inlet end of the first heat absorption pipe group and the first conveying pipeline on the outlet end of the first heat absorption pipe group, a second regulating valve is connected in series on the second bypass pipeline, a third bypass pipeline is connected in series between the first conveying pipeline on the inlet end of the second heat absorption pipe group and the first conveying pipeline on the outlet end of the second heat absorption pipe group, a second electric switch valve is connected in series on the third bypass pipeline, and a first conveying pipeline on the inlet end of the first heat release pipe group and a first conveying pipeline on the outlet end of the first heat release pipe group A fourth bypass pipeline is connected in series, a third electric switch valve is connected in series on the fourth bypass pipeline, a fifth bypass pipeline is connected in series between a first conveying pipeline on the inlet end of the fourth heat-releasing pipe group and a first conveying pipeline on the outlet end of the fourth heat-releasing pipe group, a third regulating valve is connected in series on the fifth bypass pipeline, a second temperature sensor and a first water pump are arranged on the first conveying pipeline between the outlet end of the second heat-absorbing pipe group and the inlet end of the first heat-releasing pipe group, the first water pump is positioned upstream of the connection position of the fourth bypass pipeline and the first conveying pipeline, the fourth heat exchanger comprises a fourth heat-absorbing pipe group, the fifth heat exchanger comprises a fifth heat-absorbing pipe group, the second heat-conveying pipeline comprises a first high-temperature water supply pipeline and a first low-temperature water return pipeline, the first high-temperature water supply pipeline is communicated with the third heat-absorbing pipe group and the outlet end of the fourth heat-absorbing pipe group in a parallel connection mode, the first low-temperature water return pipeline is communicated with the inlet ends of the third heat absorption pipe group and the fourth heat absorption pipe group in a parallel connection mode, a third temperature sensor is arranged on the first high-temperature water supply pipeline, and a second water pump and a fourth pressure sensor are arranged on the first low-temperature water return pipeline; the third heat conveying pipeline comprises a second high-temperature water supply pipeline and a second low-temperature water return pipeline, the second high-temperature water supply pipeline is communicated with the outlet end of the fifth heat absorption pipe set, the second low-temperature water return pipeline is communicated with the inlet end of the fifth heat absorption pipe set, a fourth temperature sensor is arranged on the second high-temperature water supply pipeline, and a fifth pressure sensor and a third water pump are arranged on the second low-temperature water return pipeline.
Furthermore, a first water replenishing pipeline is connected in series between the steam condensate conveying pipeline and a first conveying pipeline which is connected with the first heat absorption pipe group and the second heat absorption pipe group in series, a fourth electric switch valve is connected in series on the first water replenishing pipeline, and a fifth electric switch valve which is positioned at the downstream of the connection position of the first water replenishing pipeline and the steam condensate conveying pipeline is arranged on the steam condensate conveying pipeline; the first conveying pipeline between the outlet end of the first heat-releasing pipe group and the inlet end of the second heat-releasing pipe group is provided with a first water replenishing pipeline, the first water replenishing pipeline is connected with the first low-temperature water return pipeline in parallel, the second water replenishing pipeline is connected with the second low-temperature water return pipeline in parallel, the pipeline of the second water replenishing pipeline connected with the first low-temperature water return pipeline in series is provided with a sixth electric switch valve, the pipeline of the second water replenishing pipeline connected with the second low-temperature water return pipeline in series is provided with a seventh electric switch valve, and the first conveying pipeline between the outlet end of the first heat-absorbing pipe group and the inlet end of the second heat-absorbing pipe group is provided with a third pressure sensor.
The utility model also provides a retrieve coking waste heat's big difference in temperature get, heat release device's operation control method, including following step:
s1, starting a central controller, carrying out power-on fault detection on each electric control operation element by the central controller, and if a fault is found, sending fault alarm information by the central controller so as to inform a worker to carry out fault removal;
s2, when each electric control operation element has no fault or the fault is eliminated, the central controller correspondingly starts each relevant element to make the arrangement in the normal heating operation state, in the normal heating running state, the first electric switch valve, the second electric switch valve, the fourth electric switch valve, the sixth electric switch valve, the seventh electric switch valve and the first booster pump are all in the closed state, all other related elements are in a normal control state, the set values of the monitoring values of all the temperature sensors are set, here, the set value of the monitored value T1 of the first temperature sensor is set to T5, the set value of the monitored value T2 of the second temperature sensor is set to T6, the set value of the monitored value T3 of the third temperature sensor is set to T7, the set value of the monitored value T4 of the four temperature sensors is set to T8, and the set value of the monitored value P3 of the third pressure sensor is set to P4;
s2.1, in the normal heating operation state, the central controller compares a value difference delta P1 between a value monitored by the first pressure sensor and a value monitored by the second pressure sensor with set pressure difference values delta P2 and delta P3 in real time, wherein the delta P3 is larger than the delta P2, the central controller compares T1 with T5 in real time, the central controller compares T2 with T6 in real time, and the central controller compares T4 with T8 in real time;
when the delta P1 is smaller than the delta P2, the ammonia water circulation pressure difference is smaller, and the first heat exchanger is in a normal working state; when the delta P2 is not less than the delta P1 is less than the delta P3, the ammonia water circulation needs to be pressurized so as to ensure the normal heat exchange work of the first heat exchanger, and at the moment, the central controller starts the first booster pump; when the delta P1 is larger than or equal to the delta P3, the ammonia water circulation is failed, at the moment, the central processing unit closes the first booster pump and opens the first electric switch valve, and meanwhile, the central processing unit outputs an alarm signal that the first heat exchanger is failed in operation, so that a worker can check and overhaul the first heat exchanger in time;
when T1 is less than or equal to T5, the central controller detects whether the second regulating valve is in a full-open state, when the second regulating valve is in the full-open state, the central processor outputs an alarm signal that the first heat exchanger has an operation fault, so that a worker can timely inspect and overhaul the first heat exchanger, when the second regulating valve is not in the full-open state, the central controller regulates and controls the opening degree of the second regulating valve, the opening degree of the second regulating valve is increased, after the opening degree of the second regulating valve is regulated and controlled, the central controller delays to compare T1 with T5, when the delay is up, the T1 and T5 are compared in real time again, and when T1 is more than T5, the first heat exchanger is in a normal working state;
when T2 is less than or equal to T6, the central controller detects the opening of the first regulating valve, when the first regulating valve is in a full-open state, the central processor outputs an alarm signal that the second heat exchanger has an operation fault, so that a worker can timely inspect and overhaul the second heat exchanger, when the first regulating valve is not in the full-open state, the central processor increases the opening of the first regulating valve, after the opening of the first regulating valve is increased, the central processor delays to compare T2 with T6, when the delay is up, the central controller compares T2 with T6 again in real time, when T2 is greater than T6, the central controller detects the opening of the first regulating valve, when the first regulating valve is not closed, the first regulating valve is closed, then, the central processor delays to compare T2 with T6, and when the delay is up, the central controller compares T2 with T6 again in real time; when the first regulating valve is in a closed state, the central controller detects whether the second regulating valve is in a fully-opened state, when the second regulating valve is in the fully-opened state, the central processor outputs an alarm signal that the first heat exchanger has an operation fault, so that a worker can timely inspect and overhaul the first heat exchanger, when the second regulating valve is not in the fully-opened state, the central controller regulates and controls the opening degree of the second regulating valve, the opening degree of the second regulating valve is increased, after the opening degree of the second regulating valve is regulated and controlled, the central controller delays to compare T1 with T5, and when the opening degree of the second regulating valve is delayed, the central controller compares T1 with T5 in real time again;
when the temperature T2 is less than or equal to 70 ℃, the third electric switch valve is maintained in the existing state, when the temperature T2 is more than 70 ℃, the central processing unit closes the third electric switch valve, simultaneously, the third heat exchanger is opened, after the third heat exchanger is opened, the central processing unit compares the temperature T3 with the temperature T7 in real time, when the temperature T3 is less than or equal to T7, the central processing unit detects the loading position of the third heat exchanger, when the loading position of the third heat exchanger is 100%, the central processing unit enables the third heat exchanger to keep full load output, when the loading position of the third heat exchanger is not 100%, the central processing unit enables the loading position of the third heat exchanger to be increased, after the loading position of the third heat exchanger is increased, the central processing unit delays to compare the temperature T3 with the temperature T7, and after the delay time comes, the comparison of the temperature T3 with the temperature T7 is restarted; when T3 is larger than T7, the central controller detects the load position of the third heat exchanger, when the load position of the third heat exchanger is 0%, the central controller enables the third heat exchanger to keep idle load output, when the load position of the third heat exchanger is not 0%, the load position of the third heat exchanger is reduced by the central controller, after the load position reduction of the third heat exchanger is completed, the central controller delays to compare T3 with T7, and after the delay is up, the comparison of T3 and T7 is restarted;
when T4 is more than or equal to T8, the third regulating valve maintains the current operation state; when T4 < T8, the central controller detects the opening degree of the third regulating valve, when the opening degree of the third regulating valve is 0%, the central controller directly outputs a fault alarm signal of the fifth heat exchanger so that workers can check and overhaul the fifth heat exchanger in time, when the opening degree of the third regulating valve is not 0%, the central controller adjusts the opening degree of the third regulating valve to reduce the opening degree, and after the opening degree of the third regulating valve is reduced, the central controller readjusts the opening degree of the third regulating valve in real time according to the comparison result of T4T and T8.
Further, the central controller detects the opening degree of the first regulating valve in real time, and when the opening degree of the first regulating valve is not 0%, and when the P3 is not less than or equal to P4, the fifth electric switch valve, the fourth electric switch valve, the sixth electric switch valve and the seventh electric switch valve maintain the current operation state; when the P3 is less than the P4, the central controller enables the fifth electric switch valve to be closed, the fourth electric switch valve, the sixth electric switch valve and the seventh electric switch valve to be opened, water replenishing operation is then carried out, and in the process of continuous water replenishing, the central controller compares the P3 with the P4 in real time, so that water replenishing operation control is carried out according to the comparison result of the P3 and the P4.
Furthermore, the valve port opening degree regulating gradients of the first regulating valve, the second regulating valve and the third regulating valve take 10% as a regulating unit, and the load level regulating gradient of the third heat exchanger takes 10% as a regulating unit.
The utility model has the advantages that: compared with the prior art, the utility model adopts the split layout of the heat taking device and the heat releasing device, which is beneficial to the remote transmission and utilization of waste heat; the heat taking device is arranged in a coking plant, ammonia water and steam waste heat are recovered to the maximum extent in a two-stage series connection mode, the temperature difference of supply water and return water is increased, and the waste heat recovery effect is improved; the heat releasing device is arranged in a heat exchange station outside a coking plant, large temperature difference circulation of circulating water between the heat taking and releasing devices is realized by arranging a large temperature difference absorption heat exchange unit, and multistage series and parallel heat taking heat exchangers are arranged in the heat releasing device to realize gradient and stable release of heat; the device adopts a central controller, adopts full-automatic and intelligent operation to the operation process, and can improve the operation reliability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some of the preferred embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the framework of the present invention;
FIG. 2 is a flow chart of the operation control logic of the present invention;
FIG. 3 is a flow chart of the control logic for the heating operation of the first heat exchanger and the second heat exchanger;
FIG. 4 is a flow chart of the heat supply operation control logic of the third heat exchanger and the fifth heat exchanger;
in the figure: 1 a first heat exchanger, 11 ammonia water heat release pipe groups, 12 a first heat absorption pipe group, 2 a second heat exchanger, 21 a steam heat release pipe group, 22 a second heat absorption pipe group, 3 a third heat exchanger, 31 a first heat release pipe group, 32 a second heat release pipe group, 33 a third heat absorption pipe group, 4 a fourth heat exchanger, 41 a third heat release pipe group, 42 a fourth heat absorption pipe group, 5 a fifth heat exchanger, 51 a fourth heat release pipe group, 52 a fifth heat absorption pipe group, 6 a first booster pump, 7 a first water pump, 8 a second water pump, 9 a third water pump, 101 a low-temperature circulating ammonia water conveying pipeline, 102 a high-temperature ammonia water conveying pipeline, 103 a steam condensate water conveying pipeline, 104 a high-temperature steam conveying pipeline, 105 a first conveying pipeline, 106 a first high-temperature water supply pipeline, 107 a first low-temperature water return pipeline, 108 a second high-temperature water supply pipeline, 109 a second low-temperature water return pipeline, 201 a first bypass pipeline, 202 a second pipeline, 203 a third bypass pipeline, 204 fourth bypass pipe, 205 fifth bypass pipe, 301 first water replenishing pipe, 302 second water replenishing pipe, 401 first electric switch valve, 402 second electric switch valve, 403 third electric switch valve, 404 fourth electric switch valve, 405 fifth electric switch valve, 406 sixth electric switch valve, 407 seventh electric switch valve, 501 first regulating valve, 502 second regulating valve, 503 third regulating valve, 601 first pressure sensor, 602 second pressure sensor, 603 third pressure sensor, 604 fourth pressure sensor, 605 fifth pressure sensor, 701 first temperature sensor, 702 second temperature sensor, 703 third temperature sensor, 704 fourth temperature sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following specific embodiments and accompanying drawings 1-4, and it is obvious that the described embodiments are only a part of the preferred embodiments of the present invention, and not all embodiments. Those skilled in the art can make similar variations without departing from the spirit of the invention, and therefore the invention is not limited by the specific embodiments disclosed below.
The utility model provides a large temperature difference heat taking and releasing device (as shown in figure 1) for recovering coking waste heat, which comprises a first heat exchanger 1, a second heat exchanger 2, a third heat exchanger 3, a fourth heat exchanger 4, a fifth heat exchanger 5 and a central controller, wherein the first heat exchanger 1, the second heat exchanger 2, the fourth heat exchanger 4 and the fifth heat exchanger 5 are common heating heat exchange in the field, wherein the first heat exchanger 1 comprises an ammonia water heat release pipe group 11 and a first heat absorption pipe group 12, the second heat exchanger comprises a steam heat release pipe group 21 and a second heat absorption pipe group 22, the fourth heat exchanger 4 comprises a third heat release pipe group 41 and a fourth heat absorption pipe group 42, the fifth heat exchanger comprises a fourth heat release pipe group 51 and a fifth heat absorption pipe group 52, the third heat exchanger 3 is a heat pump unit, and the heat pump unit comprises a first heat release pipe group 31, a second heat release pipe group 32 and a third heat absorption pipe group 33; the heat-releasing circulation flow of high-temperature ammonia water in the first heat exchanger 1 is realized through an ammonia water circulation pipeline, the heat-releasing circulation flow of high-temperature steam in the second heat exchanger 2 is realized through a steam circulation pipeline, the heat in the first heat exchanger 1 and the second heat exchanger 2 is transferred to the third heat exchanger 3 and the fourth heat exchanger 4 and the circulation transfer of the high-temperature steam in the fifth heat exchanger 5 are realized through the first heat conveying pipeline, the heat in the third heat exchanger 3 and the fourth heat exchanger 4 is transferred to the first heating end in a circulation mode, the heat in the fifth heat exchanger 5 is transferred to the second heating end in a circulation mode through the third heat conveying pipeline, and the central controller controls the operation of the ammonia water circulation pipeline, the steam circulation pipeline, the first heat conveying pipeline, the second heat conveying pipeline and the third heat conveying pipeline.
In this specific embodiment, the specific implementation manner that the ammonia water circulation pipeline, the steam circulation pipeline, the first heat transfer pipeline, the second heat transfer pipeline, and the third heat transfer pipeline realize heat transfer among the first heat exchanger 1, the second heat exchanger 2, the third heat exchanger 3, the fourth heat exchanger 4, and the fifth heat exchanger 5 is as follows: the ammonia water circulating pipeline comprises a high-temperature ammonia water conveying pipeline 102, a first booster pump 6 and a low-temperature ammonia water conveying pipeline 101, the high-temperature ammonia water delivery pipeline 102 is communicated with the inlet end of the ammonia water heat release pipe group 11 in the first heat exchanger 1, the low-temperature ammonia water conveying pipeline 101 is communicated with the outlet end of the ammonia water heat release pipe group 11 in the first heat exchanger 1, a first bypass pipeline 201 is connected in series between the high-temperature ammonia water conveying pipeline 102 and the low-temperature ammonia water conveying pipeline 101, a first electric switch valve 401 is connected in series with the first bypass pipeline 201, the first booster pump 6 is connected in series with the high-temperature ammonia water conveying pipeline 102, and the first booster pump 6 is located downstream of the junction of the first bypass pipe 201 and the high-temperature ammonia water delivery pipe 102, a first pressure sensor 601 is arranged on the high-temperature ammonia water conveying pipeline 102, and a second pressure sensor 602 and a first temperature sensor 701 are arranged on the low-temperature ammonia water conveying pipeline 101; the steam circulation pipeline comprises a high-temperature steam conveying pipeline 104 and a steam condensate conveying pipeline 103, the high-temperature steam conveying pipeline 104 is communicated with the inlet end of a steam heat-releasing pipe group 21 in the second heat exchanger 2, the steam condensate conveying pipeline 103 is communicated with the outlet end of the steam heat-releasing pipe group 21, and a first regulating valve 501 is connected to the high-temperature steam conveying pipeline 104 in series; the first heat conveying pipeline comprises a first conveying pipeline 105, a first heat absorption pipe group 12 in the first heat exchanger 1, a second heat absorption pipe group 22 in the second heat exchanger 2, a first heat release pipe group 31, a third heat release pipe group 41 in the fourth heat exchanger, a second heat release pipe group 32 and a fourth heat release pipe group 51 in the fifth heat exchanger 5 are sequentially connected in series and run through a plurality of first conveying pipelines 105, a second bypass pipeline 202 is connected in series between the first conveying pipeline 105 on the inlet end of the first heat absorption pipe group 21 and the first conveying pipeline 105 on the outlet end of the first heat absorption pipe group 21, a second regulating valve 502 is connected in series on the second bypass pipeline 202, a third bypass pipeline 203 is connected in series between the first conveying pipeline 105 on the inlet end of the second heat absorption pipe group 22 and the first conveying pipeline 105 on the outlet end of the second heat absorption pipe group 22, a second electric switch valve 402 is connected in series on the third bypass pipeline 203, a fourth bypass pipe 204 is connected in series between the first conveying pipe 105 on the inlet end of the first heat-releasing pipe group 31 and the first conveying pipe 105 on the outlet end of the first heat-releasing pipe group 31, a third electric switch valve 403 is connected in series on the fourth bypass pipe 204, a fifth bypass pipe 205 is connected in series between the first conveying pipe 105 on the inlet end of the fourth heat-releasing pipe group 51 and the first conveying pipe 105 on the outlet end of the fourth heat-releasing pipe group 51, a third regulating valve 503 is connected in series on the fifth bypass pipe 205, a second temperature sensor 702 and a first water pump 7 are arranged on the first conveying pipe 105 between the outlet end of the second heat-absorbing pipe group 22 and the inlet end of the first heat-releasing pipe group 31, and the first water pump 7 is located upstream of the connection of the fourth bypass pipe 204 and the first conveying pipe 105, the fourth heat exchanger includes the fourth heat-absorbing pipe group 42, the fifth heat exchanger includes the fifth heat-absorbing pipe group 52, the second heat conveying pipeline comprises a first high-temperature water supply pipeline 106 and a first low-temperature water return pipeline 107, the first high-temperature water supply pipeline 106 is communicated with the outlet ends of the third heat absorption pipe group 33 and the fourth heat absorption pipe group 42 in a parallel mode, the first low-temperature water return pipeline 107 is communicated with the inlet ends of the third heat absorption pipe group 33 and the fourth heat absorption pipe group 42 in a parallel mode, a third temperature sensor 703 is arranged on the first high-temperature water supply pipeline 106, and a second water pump 8 and a fourth pressure sensor 604 are arranged on the first low-temperature water return pipeline 107; the third heat conveying pipeline comprises a second high-temperature water supply pipeline 108 and a second low-temperature water return pipeline 109, the second high-temperature water supply pipeline 108 is communicated with the outlet end of the fifth heat absorption pipe group 52, the second low-temperature water return pipeline 109 is communicated with the inlet end of the fifth heat absorption pipe group 52, a fourth temperature sensor 704 is arranged on the second high-temperature water supply pipeline 108, and a fifth pressure sensor 605 and a third water pump 9 are arranged on the second low-temperature water return pipeline 109.
In order to improve the stability of the device during heat transfer, a water replenishing system is arranged in the device, and the specific implementation mode is as follows: a first water replenishing pipeline 301 is connected in series between the steam condensate conveying pipeline 103 and a first conveying pipeline 105 which is connected with the first heat absorption pipe group 12 and the second heat absorption pipe group 22 in series, a fourth electric switch valve 404 is connected on the first water replenishing pipeline 301 in series, and a fifth electric switch valve 405 which is positioned at the downstream of the connection position of the first water replenishing pipeline 301 and the steam condensate conveying pipeline 103 is arranged on the steam condensate conveying pipeline 103; a second water replenishing pipe 302 is provided on the first conveying pipe 105 between the outlet end of the second heat-releasing pipe group 22 and the inlet end of the fourth heat-releasing pipe group 51, the second water replenishing pipe 302 is connected in parallel with the first low-temperature water returning pipe 107 and the second low-temperature water returning pipe 109, a sixth electric switch valve 406 is provided on the pipe where the second water replenishing pipe 302 and the first low-temperature water returning pipe 107 are connected in series, a seventh electric switch valve 407 is provided on the pipe where the second water replenishing pipe 302 and the second low-temperature water returning pipe 109 are connected in series, and a third pressure sensor 603 is provided on the first conveying pipe 105 between the outlet end of the first heat-absorbing pipe group 12 and the inlet end of the second heat-absorbing pipe group 22.
The utility model also provides a retrieve coking waste heat's big difference in temperature get, heat release device's operation control method, including following step:
s1, starting a central controller, carrying out power-on fault detection on each electric control operation element by the central controller, and if a fault is found, sending fault alarm information by the central controller so as to inform a worker to carry out fault removal;
s2, when each electric control operation element has no fault or the fault is eliminated, the central controller correspondingly starts each relevant element to make the arrangement in the normal heating operation state, in the normal heating running state, the first electric switch valve, the second electric switch valve, the fourth electric switch valve, the sixth electric switch valve, the seventh electric switch valve and the first booster pump are all in the closed state, all other related elements are in a normal control state, the set values of the monitoring values of all the temperature sensors are set, here, the set value of the monitor value T1 of the first temperature sensor 701 is set to T5, the set value of the monitor value T2 of the second temperature sensor 702 is set to T6, the set value of the monitor value T3 of the third temperature sensor 703 is set to T7, the set value of the monitor value T4 of the four temperature sensor 704 is set to T8, and the set value of the monitor value P3 of the third pressure sensor 603 is set to P4;
s2.1, in the normal heating operation state, the central controller compares a difference delta P1 between a value monitored by the first pressure sensor 601 and a value monitored by the second pressure sensor 602 with set pressure difference values delta P2 and delta P3 in real time, wherein the delta P3 is larger than delta P2, the central controller compares T1 with T5 in real time, the central controller compares T2 with T6 in real time, and the central controller compares T4 with T8 in real time;
when the delta P1 is less than the delta P2, the ammonia water circulation pressure difference is small, and the first heat exchanger 1 is in a normal working state; when the delta P2 is not less than the delta P1 is less than the delta P3, the ammonia water circulation needs to be pressurized so as to ensure the normal heat exchange work of the first heat exchanger 1, and at the moment, the central controller starts the first booster pump 6; when the delta P1 is larger than or equal to the delta P3, the ammonia water circulation is failed, at the moment, the central processing unit closes the first booster pump 6 and opens the first electric switch valve 401, and meanwhile, the central processing unit outputs an alarm signal that the first heat exchanger 1 is failed in operation, so that a worker can conveniently and timely troubleshoot and overhaul the first heat exchanger;
when T1 is not more than T5, the central controller detects whether the second regulating valve 502 is in a fully open state, when the second regulating valve 502 is in the fully open state, the central processor outputs an alarm signal that the first heat exchanger 1 has an operation fault, so that a worker can timely inspect and overhaul the first heat exchanger, when the second regulating valve 502 is not in the fully open state, the central controller regulates and controls the opening degree of the second regulating valve 502, the opening degree of the second regulating valve 502 is increased, after the opening degree of the second regulating valve 502 is regulated and controlled, the central controller delays to compare T1 with T5, when the delay is up, the T1 and T5 are compared in real time again, and when T1 is more than T5, the first heat exchanger 1 is in a normal working state;
when the T2 is less than or equal to T6, the central controller detects the opening degree of the first adjusting valve 501, when the first adjusting valve 501 is in a full-open state, the central processing unit outputs an alarm signal of the second heat exchanger 2 with operation failure so that the working personnel can check and overhaul the second heat exchanger in time, when the first regulating valve 501 is not in the fully open state, the cpu increases the opening degree of the first regulating valve 501, and after the opening degree of the first regulating valve 501 is increased, the central processing unit delays to compare the T2 with the T6, and when the delay time is up, the central processing unit compares the T2 with the T6 again in real time, when T2 is larger than T6, the central controller detects the opening degree of the first regulating valve 501, when the first regulating valve 501 is not closed, the first regulating valve 501 is closed, then, the central processing unit delays to compare the T2 with the T6, and when the delay is up, the T2 and the T6 are compared again in real time; when the first regulating valve 501 is in a closed state, the central controller detects whether the second regulating valve 502 is in a fully open state, when the second regulating valve 502 is in the fully open state, the central processor outputs an alarm signal that the first heat exchanger 1 has an operation fault, so that a worker can timely inspect and overhaul the first heat exchanger 1, when the second regulating valve 502 is not in the fully open state, the central controller regulates and controls the opening degree of the second regulating valve 502, so that the opening degree of the second regulating valve 502 is increased, after the opening degree regulation and control of the second regulating valve 502 is completed, the central controller delays to compare the T1 with the T5, and when the delay is up, the central controller compares the T1 with the T5 in real time again;
when the temperature T2 is less than or equal to 70 ℃, the third electric switch valve 403 is maintained in the existing state, when the temperature T2 is more than 70 ℃, the central processing unit closes the third electric switch valve 403, simultaneously, the third heat exchanger 3 is opened, after the third heat exchanger 3 is opened, the central processing unit compares the temperature T3 with the temperature T7 in real time, when the temperature T3 is less than or equal to T7, the central processing unit detects the loading position of the third heat exchanger 3, when the loading position of the third heat exchanger 3 is 100%, the central processing unit enables the third heat exchanger 3 to keep full load output, when the loading position of the third heat exchanger 3 is not 100%, the central processing unit enables the loading position of the third heat exchanger 3 to be increased, after the loading position of the third heat exchanger 3 is increased, the central processing unit delays to compare the temperature T3 with the temperature T7, and after the delay time comes up, the comparison of the temperature T3 with the temperature T7 is restarted; when the load position of the third heat exchanger 3 is 0%, the central controller enables the third heat exchanger 3 to keep idle load output, when the load position of the third heat exchanger 3 is not 0%, the load position of the third heat exchanger 3 is reduced, after the load position of the third heat exchanger 3 is reduced, the central controller delays to compare the T3 with the T7, and after the delay is up, the comparison of the T3 with the T7 is restarted;
when T4 is more than or equal to T8, the third regulating valve 503 maintains the current operation state; when the opening degree of the third adjusting valve 503 is less than T4 and less than T8, the central controller detects the opening degree of the third adjusting valve 503, when the opening degree of the third adjusting valve 503 is 0%, the central controller directly outputs a fault alarm signal of the fifth heat exchanger 5, so that a worker can check and overhaul the fifth heat exchanger in time, when the opening degree of the third adjusting valve 503 is not 0%, the central controller adjusts the opening degree of the third adjusting valve 503 to be smaller, and after the opening degree of the third adjusting valve 503 is smaller, the central controller readjusts the opening degree of the third adjusting valve 503 in real time according to a comparison result of T4T and T8.
Further, in the normal heating operation, the water replenishing process includes that the central controller detects the opening degree of the first regulating valve 51 in real time, and when the opening degree of the first regulating valve 51 is not 0%, and when P3 is not less than or equal to P4, the fifth electric switch valve 405, the fourth electric switch valve 404, the sixth electric switch valve 406 and the seventh electric switch valve 407 maintain the current operation state; when the P3 is less than the P4, the central controller enables the fifth electric switch valve 405 to be closed, the fourth electric switch valve 404, the sixth electric switch valve 406 and the seventh electric switch valve 407 to be opened, water replenishing operation is carried out, and in the process of continuously replenishing water, the central controller compares the P3 with the P4 in real time, so that water replenishing operation control is carried out according to the comparison result of the P3 and the P4.
Further, in order to improve the system regulation stability, the valve port opening degree regulation gradients of the first regulation valve 501, the second regulation valve 502 and the third regulation valve 503 are set to 10% as a regulation unit, and the load level regulation gradient of the third heat exchanger 3 is set to 10% as a regulation unit.
In addition to the technical features described in the specification, the technology is known to those skilled in the art.
The above description is provided for the preferred embodiments and examples of the present invention with reference to the accompanying drawings, but the present invention is not limited to the above embodiments and examples, and it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit of the present invention, and these modifications and variations should be construed as the protection scope of the present invention.
Claims (4)
1. A large-temperature-difference heat taking and releasing device for recovering coking waste heat is characterized by comprising a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a fifth heat exchanger and a central controller, wherein heat-releasing circulation flow of high-temperature ammonia water in the first heat exchanger is realized through an ammonia water circulation pipeline, heat-releasing circulation flow of high-temperature steam in the second heat exchanger is realized through a steam circulation pipeline, heat in the first heat exchanger and the second heat exchanger is circularly transferred to the third heat exchanger, the fourth heat exchanger and the fifth heat exchanger through a first heat conveying pipeline, heat in the third heat exchanger and the fourth heat exchanger is circularly transferred to a first heating end through a second heat conveying pipeline, heat in the fifth heat exchanger is circularly transferred to a second heating end through the third heat conveying pipeline, and the central controller controls the ammonia water circulation pipeline and the steam circulation pipeline, Operation of the first heat transfer line, the second heat transfer line and the third heat transfer line.
2. The large temperature difference heat extraction and release device for recovering coking waste heat according to claim 1, characterized in that the third heat exchanger is a heat pump unit, and the heat pump unit comprises a first heat release pipe set, a second heat release pipe set and a third heat absorption pipe set.
3. The large temperature difference heat extraction and release device for recovering coking waste heat according to claim 2, characterized in that the ammonia water circulation pipeline comprises a high temperature ammonia water delivery pipeline, a first booster pump and a low temperature ammonia water delivery pipeline, the high temperature ammonia water delivery pipeline is communicated with the inlet end of the ammonia water heat release pipe group in the first heat exchanger, the low temperature ammonia water delivery pipeline is communicated with the outlet end of the ammonia water heat release pipe group in the first heat exchanger, a first bypass pipeline is connected between the high temperature ammonia water delivery pipeline and the low temperature ammonia water delivery pipeline in series, a first electric switch valve is connected on the first bypass pipeline in series, the first booster pump is connected on the high temperature ammonia water delivery pipeline in series, the first booster pump is located at the downstream of the connection part of the first bypass pipeline and the high temperature ammonia water delivery pipeline, a first pressure sensor is arranged on the high temperature ammonia water delivery pipeline, a second pressure sensor and a first temperature sensor are arranged on the low-temperature ammonia water conveying pipeline; the steam circulation pipeline comprises a high-temperature steam conveying pipeline and a steam condensate conveying pipeline, the high-temperature steam conveying pipeline is communicated with the inlet end of a steam heat-releasing pipe group in the second heat exchanger, the steam condensate conveying pipeline is communicated with the outlet end of the steam heat-releasing pipe group, and a first regulating valve is connected to the high-temperature steam conveying pipeline in series; the first heat conveying pipeline comprises a first conveying pipeline, a first heat absorption pipe group in the first heat exchanger, a second heat absorption pipe group in the second heat exchanger, a first heat release pipe group, a third heat release pipe group in the fourth heat exchanger, a second heat release pipe group and a fourth heat release pipe group in the fifth heat exchanger are sequentially connected in series through a plurality of first conveying pipelines, a second bypass pipeline is connected in series between the first conveying pipeline on the inlet end of the first heat absorption pipe group and the first conveying pipeline on the outlet end of the first heat absorption pipe group, a second regulating valve is connected in series on the second bypass pipeline, a third bypass pipeline is connected in series between the first conveying pipeline on the inlet end of the second heat absorption pipe group and the first conveying pipeline on the outlet end of the second heat absorption pipe group, a second electric switch valve is connected in series on the third bypass pipeline, and a first conveying pipeline on the inlet end of the first heat release pipe group and a first conveying pipeline on the outlet end of the first heat release pipe group A fourth bypass pipeline is connected in series, a third electric switch valve is connected in series on the fourth bypass pipeline, a fifth bypass pipeline is connected in series between a first conveying pipeline on the inlet end of the fourth heat-releasing pipe group and a first conveying pipeline on the outlet end of the fourth heat-releasing pipe group, a third regulating valve is connected in series on the fifth bypass pipeline, a second temperature sensor and a first water pump are arranged on the first conveying pipeline between the outlet end of the second heat-absorbing pipe group and the inlet end of the first heat-releasing pipe group, the first water pump is positioned upstream of the connection position of the fourth bypass pipeline and the first conveying pipeline, the fourth heat exchanger comprises a fourth heat-absorbing pipe group, the fifth heat exchanger comprises a fifth heat-absorbing pipe group, the second heat-conveying pipeline comprises a first high-temperature water supply pipeline and a first low-temperature water return pipeline, the first high-temperature water supply pipeline is communicated with the third heat-absorbing pipe group and the outlet end of the fourth heat-absorbing pipe group in a parallel connection mode, the first low-temperature water return pipeline is communicated with the inlet ends of the third heat absorption pipe group and the fourth heat absorption pipe group in a parallel connection mode, a third temperature sensor is arranged on the first high-temperature water supply pipeline, and a second water pump and a fourth pressure sensor are arranged on the first low-temperature water return pipeline; the third heat conveying pipeline comprises a second high-temperature water supply pipeline and a second low-temperature water return pipeline, the second high-temperature water supply pipeline is communicated with the outlet end of the fifth heat absorption pipe group, the second low-temperature water return pipeline is communicated with the inlet end of the fifth heat absorption pipe group, a fourth temperature sensor is arranged on the second high-temperature water supply pipeline, and a fifth pressure sensor and a third water pump are arranged on the second low-temperature water return pipeline.
4. The large temperature difference heat extraction and release device for recovering the coking waste heat according to claim 3, characterized in that a first water replenishing pipeline is connected in series between the steam condensate conveying pipeline and a first conveying pipeline which is connected in series with the first heat absorption pipe set and the second heat absorption pipe set, a fourth electric switch valve is connected in series on the first water replenishing pipeline, and a fifth electric switch valve is arranged on the steam condensate conveying pipeline and is positioned at the downstream of the connection position of the first water replenishing pipeline and the steam condensate conveying pipeline; the first conveying pipeline between the outlet end of the first heat-releasing pipe group and the inlet end of the second heat-releasing pipe group is provided with a first water replenishing pipeline, the first water replenishing pipeline is connected with the first low-temperature water return pipeline in parallel, the second water replenishing pipeline is connected with the second low-temperature water return pipeline in parallel, the pipeline of the second water replenishing pipeline connected with the first low-temperature water return pipeline in series is provided with a sixth electric switch valve, the pipeline of the second water replenishing pipeline connected with the second low-temperature water return pipeline in series is provided with a seventh electric switch valve, and the first conveying pipeline between the outlet end of the first heat-absorbing pipe group and the inlet end of the second heat-absorbing pipe group is provided with a third pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120554551.8U CN214407031U (en) | 2021-03-17 | 2021-03-17 | Large temperature difference heat taking and releasing device for recovering coking waste heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120554551.8U CN214407031U (en) | 2021-03-17 | 2021-03-17 | Large temperature difference heat taking and releasing device for recovering coking waste heat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214407031U true CN214407031U (en) | 2021-10-15 |
Family
ID=78029304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120554551.8U Active CN214407031U (en) | 2021-03-17 | 2021-03-17 | Large temperature difference heat taking and releasing device for recovering coking waste heat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214407031U (en) |
-
2021
- 2021-03-17 CN CN202120554551.8U patent/CN214407031U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108224535B (en) | Complementary integrated system of cogeneration of thermal power plant and compressed air energy storage | |
| CN214581900U (en) | Air conditioner cold and heat source system for gas turbine power plant | |
| CN111322660B (en) | Integrated absorption heat pump supercritical carbon dioxide circulating cogeneration system and method | |
| CN211781359U (en) | Supercritical carbon dioxide circulation combined heat and power generation system integrated with absorption heat pump | |
| CN116202128B (en) | Method for heating by utilizing compressed air energy storage compression heat waste heat | |
| CN214407031U (en) | Large temperature difference heat taking and releasing device for recovering coking waste heat | |
| CN202073749U (en) | Heat energy recycling system of air compressor | |
| CN206626980U (en) | Air-cooled Unit high back pressure circulating water heating winterization system | |
| CN112923597A (en) | Large-temperature-difference heat taking and releasing device for recovering coking waste heat and operation control method | |
| CN209840253U (en) | Heat pump system for power plant waste heat cold and hot coupling utilization | |
| CN214469445U (en) | Generator stator cooling water waste heat utilization equipment | |
| CN114060110A (en) | Bypass heating heat cascade utilization system and method capable of supplying black start power supply | |
| CN211823547U (en) | Rubber drying device based on light-gathering solar energy | |
| CN113587176A (en) | Clean heat supply system with steam extraction coupling solar energy of thermoelectric unit and operation method | |
| CN219607418U (en) | Waste heat recovery system of waste heat boiler | |
| CN214424553U (en) | Well head system of preventing frostbite based on big difference in temperature heat transfer technique | |
| CN221195202U (en) | High-efficiency energy-saving system of fuel machine power station voltage regulating station | |
| CN216240846U (en) | Differential pressure cold energy comprehensive utilization device of gas power plant | |
| CN215062978U (en) | Starting device of refrigerating machine | |
| CN114061322B (en) | Intelligent circulating boiler for generating electricity by using waste heat of coke dry quenching | |
| CN117704456B (en) | Heat collector heating system and method utilizing compressed air to store energy | |
| CN217080588U (en) | Cogeneration heating and power generation system | |
| CN220728973U (en) | Exhaust steam waste heat recovery system and air condensing system | |
| CN214406013U (en) | Novel tail waste heat cascade comprehensive utilization system of H-level gas turbine waste heat boiler | |
| CN217685948U (en) | Data center cooling system for multi-energy supply electric heating double refrigeration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |