CN108917216B - Fermentation vat waste heat recovery utilizes device - Google Patents
Fermentation vat waste heat recovery utilizes device Download PDFInfo
- Publication number
- CN108917216B CN108917216B CN201810414131.2A CN201810414131A CN108917216B CN 108917216 B CN108917216 B CN 108917216B CN 201810414131 A CN201810414131 A CN 201810414131A CN 108917216 B CN108917216 B CN 108917216B
- Authority
- CN
- China
- Prior art keywords
- water
- pipeline
- gas
- heat exchanger
- fermentation tank
- 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
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/58—Reaction vessels connected in series or in parallel
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/12—Means for regulation, monitoring, measurement or control, e.g. flow regulation of temperature
- C12M41/18—Heat exchange systems, e.g. heat jackets or outer envelopes
- C12M41/22—Heat exchange systems, e.g. heat jackets or outer envelopes in contact with the bioreactor walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D3/00—Hot-water central heating systems
- F24D3/02—Hot-water central heating systems with forced circulation, e.g. by pumps
-
- 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
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2200/00—Heat sources or energy sources
- F24D2200/16—Waste heat
- F24D2200/28—Biological processes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D2220/00—Components of central heating installations excluding heat sources
- F24D2220/06—Heat exchangers
Abstract
The invention discloses a fermentation tank waste heat recycling device, which belongs to the field of heat recycling and comprises a fermentation tank group, an air-water heat exchange device, an outdoor water conveying main pipeline, a pipeline heat preservation layer, a water discharge pipe, a constant pressure water replenishing device, a water temperature meter and an indoor heat dissipation device, wherein the air-water heat exchange device is connected with the fermentation tank group through a pipeline buried underground, two ends of the outdoor water conveying main pipeline are respectively connected with the air-water heat exchange device and the indoor heat dissipation device through pipeline joints, the pipeline heat preservation layer is arranged on an outdoor main pipeline, the water discharge pipe is arranged in the outdoor water return main pipeline, the constant pressure water replenishing device is arranged in a water return pipeline at the joint of the outdoor water conveying main pipeline and the indoor heat dissipation device, and the water temperature meter is arranged in a water inlet pipe in. The gas-water heat exchange device pumps hot gas in the fermentation tank through a gas pipeline so as to circularly heat water and finally reach the required temperature. The invention has higher heat recovery and utilization rate and can meet the heating requirement of classrooms.
Description
Technical Field
The invention relates to a heat recycling device, in particular to a fermentation tank waste heat recycling device.
Background
In a pasture, a large amount of animal manure is produced every day, and the manure releases a large amount of heat after being fermented in a fermentation tank. If we can recover and utilize the heat, the problem of energy shortage which is serious at present can be relieved to a certain extent.
At present, fermentation tank waste heat recycling devices of different types are also provided, and the fermentation tank waste heat recycling devices are mainly used for recycling waste heat of a single small fermentation tank, and are low in technical content and recycling rate, so that the fermentation tank waste heat recycling devices are mainly used in occasions with low temperature requirements, such as greenhouses and barns, and cannot meet heating requirements of occasions with high temperature requirements, such as classrooms and families. The maximum temperature of the gas in the fermentation tank is 70 ℃ generally, and the temperature of inlet water required by an indoor heating system is about 60 ℃. Therefore, the waste heat of the fermentation tank can be basically recovered and used for indoor heating through the accurate design and calculation of the heat exchange system according to the heat exchange principle.
Therefore, a fermentation tank waste heat recycling device needs to be designed, so that the fermentation tank waste heat recycling device can be applied to large fermentation tank groups, the recycling rate of the fermentation tank waste heat is improved, and the heating requirements of occasions such as classrooms and families are met.
Disclosure of Invention
The invention aims to solve the problems and provide a fermentation tank waste heat recycling device which is high in heat recycling rate, can be applied to large fermentation tank groups or fermentation tank groups at the same time and meets indoor heating requirements. The technical scheme adopted by the invention for solving the problems is as follows:
a fermentation tank waste heat recycling device comprises a fermentation tank group, a gas-water heat exchange device, an outdoor water delivery main pipeline, a pipeline heat preservation layer, a water drain pipe, a constant pressure water supplementing device, a water temperature meter and an indoor heat dissipation device.
The gas-water heat exchange device comprises a shell-and-tube heat exchanger, a fermentation tank gas output pipeline, a fermentation tank gas recovery pipeline, a Roots blower, a heat exchanger base, a circulating water pump, a heat exchanger water outlet pipe and a heat exchanger water return pipe, wherein the number of the fermentation tank gas output pipelines is 10, and the fermentation tank gas output pipelines are respectively connected with 10 gas inlets of the shell-and-tube heat exchanger.
The fermentation tank gas recovery pipelines are divided into two groups, and each group is provided with five small gas return pipes which are respectively connected with five gas outlets of the shell-and-tube heat exchanger.
The shell-and-tube heat exchanger selects a cross flow heat exchange mode according to the characteristics of the system, and 10 gas inlets and outlets are respectively arranged and uniformly distributed on the shell.
The Roots blowers are respectively arranged between the gas recovery pipelines of each group of fermentation tanks.
The indoor heat dissipation system is composed of an indoor transverse water inlet pipe, an indoor transverse water return pipe, a vertical water inlet pipe, a vertical water return pipe, six steel column radiators, an automatic exhaust valve and a radiator switch, wherein the six steel column radiators are eight groups and are evenly distributed in two rooms.
The fermentation pool group is formed by densely arranging 9 underground fermentation pools with the area of 100 square meters, and the fermentation pool group can realize gas circulation with an external gas-water heat exchange device through simple internal structure modification.
The invention has the beneficial effects that: (1) through the structural design of the fermentation tank waste heat recycling device, the waste heat recycling rate is improved; (2) through the structural design of the fermentation tank waste heat recycling device, the fermentation tank waste heat can be used for indoor heating, so that the problem of energy shortage is relieved to a certain extent.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view showing the flow of gas inside the fermentation tank group according to the present invention;
FIG. 3 is a schematic view of the structure of the gas-water heat exchange device of the present invention;
FIG. 4 is a schematic structural view of a main water delivery pipe of the present invention;
FIG. 5 is a schematic view of an indoor heat dissipation device according to the present invention;
FIG. 6 is a schematic exterior view of a shell-and-tube heat exchanger according to the present invention;
FIG. 7 is a schematic view of the heat exchanger base construction of the present invention;
FIG. 8 is a schematic exterior view of the circulating water pump of the present invention.
In the figure: 1. fermenting pool group, 2, fermenting pool gas recycling pipeline, 3, roots blower, 4, blower and heat exchanger connecting pipeline, 5, circulating water pump, 6, constant pressure water replenishing tank, 601, constant pressure water replenishing pipe, 7, water temperature meter, 8, indoor horizontal water inlet pipe, 9, automatic exhaust valve, 10, steel six-column radiator, 1001, radiator switch, 11, indoor horizontal water return pipe, 12, vertical water return pipe, 13, vertical water inlet pipe, 14, water return main pipeline, 15, pipeline heat preservation, 16, water discharge pipe, 1601, water discharge pipe switch, 17, shell-and-tube heat exchanger, 1701, heat exchanger water inlet pipe, 1702, heat exchanger water outlet pipe, 18, heat exchanger base, 19, water inlet main pipeline, 20, fermenting pool gas outlet output pipeline.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in figures 1, 2, 3, 4, 5, 6 and 7, the fermentation tank waste heat recycling device comprises a fermentation tank group 1, a gas-water heat exchange device, an outdoor water delivery main pipe, a pipe insulation layer 15, a water discharge pipe 16, a constant pressure water replenishing device, a water temperature meter 7 and an indoor heat dissipation device, it is characterized in that the gas-water heat exchange device is connected with the fermentation pool group 1 through a pipeline buried underground, the two ends of the outdoor main water delivery pipeline are respectively connected with the air-water heat exchange device and the indoor heat dissipation device through pipeline joints, the pipeline heat-insulating layer 15 is packaged on an outdoor main pipeline, the water discharge pipe 16 is arranged in an outdoor return water main pipeline, the constant pressure water supplementing device is arranged in a water return pipeline at the joint of the outdoor main water delivery pipeline and the indoor heat radiating device, the water temperature meter 7 is arranged in a water inlet pipe at the front end of a first group of radiators of the indoor heat radiating device.
The gas-water heat exchange device comprises a shell-and-tube heat exchanger 17, a fermentation tank gas output pipeline 20, a Roots blower 3, a blower and heat exchanger connecting pipeline 4, a heat exchanger base 18, a circulating water pump 5, a heat exchanger water outlet pipe 1701 and a heat exchanger water return pipe 1702, wherein 10 fermentation tank gas output pipelines 20 are respectively connected with 10 gas inlets of the shell-and-tube heat exchanger.
Two groups of the blower and heat exchanger connecting pipelines 4 are provided, each group is provided with five small air return pipes and is respectively connected with five air outlets of the shell-and-tube heat exchanger 17.
The shell-and-tube heat exchanger 17 selects a cross-flow heat exchange mode according to the characteristics of the system, and 10 gas inlets and outlets are respectively arranged and uniformly distributed on the shell.
The two Roots blowers 3 are respectively arranged between the gas recovery pipeline 2 of each group of fermentation tank and the connecting pipeline 4 of the blower and the heat exchanger.
The indoor heat dissipation system is composed of an indoor transverse water inlet pipe 8, an indoor transverse water return pipe 11, a vertical water inlet pipe 13, a vertical water return pipe 12, a six-column steel heat radiator 10, an automatic exhaust valve 9 and a heat radiator switch 1001, wherein the six-column steel heat radiator 10 is provided with eight groups which are evenly distributed in two rooms.
The fermentation pool group 1 is formed by densely arranging 9 underground fermentation pools with the area of 100 square meters, and can realize gas circulation with an external gas-water heat exchange device through simple internal structure modification.
When the device works, normal-temperature water is injected from the constant-pressure water supplementing tank 6 until the device is fully filled with water, then two Roots blowers 3 are started to extract hot gas from the fermentation tank group 1, the hot gas is introduced into the shell-and-tube heat exchanger 17 and then returns to the fermentation tank group 1 through the fermentation tank gas recovery pipeline 2, so that the shell-and-tube heat exchanger 17 achieves the preheating purpose in advance, after the hot gas is preheated for a period of time, the circulating water pump 5 is started to enable the water to start to circularly flow in the system through the shell-and-tube heat exchanger 17, the water inlet main pipeline 19, the vertical water inlet pipeline 13, the indoor transverse water inlet pipeline 11, the indoor transverse water return pipeline 11, the vertical water return pipeline 12 and the water; when the temperature before a certain flow returns to the shell-and-tube heat exchanger 17 is about 40 ℃ (the water temperature change can be monitored by observing the indoor water temperature meter 7), the design temperature of heating inlet water can be 60 ℃ after heat exchange and temperature rise are carried out by the shell-and-tube heat exchanger 17, and at the moment, the system can enter a normal heating state by opening all radiator switches 1001.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. A fermentation tank waste heat recycling device comprises a fermentation tank group, a gas-water heat exchange device, an outdoor water conveying main pipeline, a pipeline heat insulation layer, a water drain pipe, a constant pressure water supplementing device, a water temperature meter and an indoor heat dissipation device, and is characterized in that the gas-water heat exchange device is connected with the fermentation tank group through a pipeline buried underground, two ends of the outdoor water conveying main pipeline are respectively connected with the gas-water heat exchange device and the indoor heat dissipation device through pipeline joints, the pipeline heat insulation layer is packaged on an outdoor main pipeline, the water drain pipe is installed in the outdoor water return main pipeline, the constant pressure water supplementing device is installed in a water conveying pipeline at the joint of the outdoor water conveying main pipeline and the indoor heat dissipation device, and the water temperature meter is installed in a water inlet pipe at the front end of a first group of radiators of the indoor heat dissipation device;
the gas-water heat exchange device consists of a shell-and-tube heat exchanger, a fermentation tank gas output pipeline, a Roots blower, a blower and heat exchanger connecting pipeline, a heat exchanger base, a circulating water pump, a heat exchanger water outlet pipe and a heat exchanger water return pipe, wherein the number of the fermentation tank gas output pipelines is 10, and the fermentation tank gas output pipelines are respectively connected with 10 gas inlets of the shell-and-tube heat exchanger;
the two groups of connecting pipelines of the air blowers and the heat exchangers are provided, and each group is provided with five small air return pipes which are respectively connected with five air outlets of the shell-and-tube heat exchanger;
the shell-and-tube heat exchanger selects a cross flow heat exchange mode according to the characteristics of the system, and 10 gas inlets and outlets are respectively arranged and uniformly distributed on the shell;
the indoor heat dissipation device consists of an indoor transverse water inlet pipe, an indoor transverse water return pipe, a vertical water inlet pipe, a vertical water return pipe, six steel column radiators, an automatic exhaust valve and a radiator switch, wherein eight groups of the six steel column radiators are evenly distributed in two rooms;
the two Roots blowers are respectively arranged between the gas recovery pipeline of each group of fermentation tank and the connecting pipeline of the blower and the heat exchanger;
when the system works, normal-temperature water is injected from the constant-pressure water supplementing device until the device is fully filled with water, then two Roots blowers are started to extract hot gas from a fermentation pool group, the hot gas is introduced into a shell-and-tube heat exchanger and then returns to the fermentation pool group through a fermentation pool gas recovery pipeline, so that the purpose of preheating the shell-and-tube heat exchanger is achieved in advance, and after the hot gas is preheated for a period of time, a circulating water pump is started to enable water to flow circularly in the system through the shell-and-tube heat exchanger, an outdoor water conveying main pipeline, a vertical water inlet pipe, an indoor transverse water return pipe, a vertical water return pipe and; when the temperature before a certain flow returns to the shell-and-tube heat exchanger is about 40 ℃, the heat exchange temperature of the shell-and-tube heat exchanger is raised to reach the designed temperature of heating inlet water of 60 ℃, and at the moment, all radiator switches are opened to enable the system to enter a normal heating state.
2. The fermentation tank waste heat recycling device of claim 1, wherein the fermentation tank group is formed by densely arranging 9 underground fermentation tanks with the area of 100 square meters, and the fermentation tanks and an external gas-water heat exchange device realize gas circulation through simple internal structure modification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810414131.2A CN108917216B (en) | 2018-05-03 | 2018-05-03 | Fermentation vat waste heat recovery utilizes device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810414131.2A CN108917216B (en) | 2018-05-03 | 2018-05-03 | Fermentation vat waste heat recovery utilizes device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108917216A CN108917216A (en) | 2018-11-30 |
| CN108917216B true CN108917216B (en) | 2020-02-07 |
Family
ID=64403410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810414131.2A Active CN108917216B (en) | 2018-05-03 | 2018-05-03 | Fermentation vat waste heat recovery utilizes device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108917216B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112097312A (en) * | 2020-09-21 | 2020-12-18 | 东北农业大学 | Device and method for continuously extracting heat from composting system |
| CN112210478A (en) * | 2020-09-29 | 2021-01-12 | 黑龙江省农业科学院畜牧研究所 | Device and method for farmers to produce heat and warm by utilizing straw fermentation reactor |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706186A (en) * | 2012-06-15 | 2012-10-03 | 苏州张扬能源科技有限公司 | Methane waste-heat utilization device |
| CN203692131U (en) * | 2014-01-26 | 2014-07-09 | 曲靖市麒麟区天源实业有限公司 | Pigpen marsh gas heating system |
| CN104613525A (en) * | 2015-01-30 | 2015-05-13 | 无锡昊瑜节能环保设备有限公司 | Environment-friendly methane heating device and method applicable to villages and towns |
| CN204690006U (en) * | 2015-04-23 | 2015-10-07 | 河南仁华生物科技有限公司 | Fermentation plant residual heat using device |
| CN206669864U (en) * | 2017-04-28 | 2017-11-24 | 河北元浦节能科技有限公司 | A kind of novel household heating equipment |
-
2018
- 2018-05-03 CN CN201810414131.2A patent/CN108917216B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706186A (en) * | 2012-06-15 | 2012-10-03 | 苏州张扬能源科技有限公司 | Methane waste-heat utilization device |
| CN203692131U (en) * | 2014-01-26 | 2014-07-09 | 曲靖市麒麟区天源实业有限公司 | Pigpen marsh gas heating system |
| CN104613525A (en) * | 2015-01-30 | 2015-05-13 | 无锡昊瑜节能环保设备有限公司 | Environment-friendly methane heating device and method applicable to villages and towns |
| CN204690006U (en) * | 2015-04-23 | 2015-10-07 | 河南仁华生物科技有限公司 | Fermentation plant residual heat using device |
| CN206669864U (en) * | 2017-04-28 | 2017-11-24 | 河北元浦节能科技有限公司 | A kind of novel household heating equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108917216A (en) | 2018-11-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101581517B (en) | Heat pump system of single-loop geothermal underground heat exchanger | |
| CN108917216B (en) | Fermentation vat waste heat recovery utilizes device | |
| CN201225700Y (en) | Solar synthesis heat utilization system | |
| CN103471243A (en) | Hot water supply system | |
| CN203177502U (en) | Vacuum type solar energy hot water system | |
| CN208253697U (en) | A kind of geothermal heating operating system of accumulation of heat and multistage terminal user's combined heat | |
| CN101469918A (en) | Geothermal heating and heat pump combined automatic heat supply system | |
| CN104764213B (en) | The solar energy-heat pump combining heating system that greenhouse cultivation water and air heats parallel | |
| CN107781096A (en) | Water wheels, generating, heat pump all-in-one | |
| CN203837073U (en) | Multistage superconductive heat transfer heating device | |
| CN203980706U (en) | A kind of liquid nitrogen gasification refrigeration system | |
| CN202709456U (en) | Crude oil heating system of air source heat pump | |
| CN203454397U (en) | Instantly heated water supply device | |
| CN208222887U (en) | The U-shaped imbedded pipe heat-exchanging system of vacuum insulation | |
| CN202745813U (en) | Mine well ventilation air and water drainage heat energy comprehensive utilization system | |
| CN206113084U (en) | Built -in coil pipe fluorine circulation heat transfer heating water case | |
| CN206337274U (en) | A kind of tank for sewage gas heating system by all kinds of means | |
| CN200992551Y (en) | Methane fermented material external-cycle heating device | |
| CN204880855U (en) | Centralized double -barrelled type of cascade utilization can source station system | |
| CN204880700U (en) | Split type wind regime waste heat hot water water pump | |
| CN218154441U (en) | Buried pipe air channel and sewage source heat pump coupling heating system | |
| CN217737401U (en) | Industrial waste heat and geothermal combined heating system | |
| CN108204625A (en) | Solar-energy air-energy geothermal heat pipeline evacuation and anti-freezing system | |
| CN205002623U (en) | Take direct current cooling water supply system of natural draft cooling tower cooling | |
| CN204786688U (en) | Single tube type cascade utilization distributing type can source station system |
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 |