CN214199238U - Oil field waste heat recovery system applying solar energy and lithium bromide heat pump - Google Patents
Oil field waste heat recovery system applying solar energy and lithium bromide heat pump Download PDFInfo
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- CN214199238U CN214199238U CN202120130911.1U CN202120130911U CN214199238U CN 214199238 U CN214199238 U CN 214199238U CN 202120130911 U CN202120130911 U CN 202120130911U CN 214199238 U CN214199238 U CN 214199238U
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- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 title claims abstract description 90
- 239000002918 waste heat Substances 0.000 title claims abstract description 25
- 238000011084 recovery Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 243
- 238000005338 heat storage Methods 0.000 claims abstract description 58
- 239000006096 absorbing agent Substances 0.000 claims abstract description 54
- 239000007921 spray Substances 0.000 claims description 4
- 238000005485 electric heating Methods 0.000 claims description 2
- 239000011552 falling film Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 5
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- 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
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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- 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
- Y02B30/625—Absorption based systems combined with heat or power generation [CHP], e.g. trigeneration
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
The utility model discloses an use oil field waste heat recovery system of solar energy and lithium bromide heat pump, including solar collector array, heat storage water tank, secret heat-retaining system, heat transfer moisturizing case, circulating water tank, auxiliary heat source, generator, condenser, evaporimeter, absorber, solution heat exchanger, choke valve, overflow pipe etc.. The utility model discloses utilize heat pump technology to draw oil recovery production water waste heat, reduce the heat energy conversion of taste and become high-grade heat energy, the high temperature heat source is provided by renewable energy solar energy system, and the high temperature hot water of preparing is used for crude oil defeated heating outward, clear water heating, domestic water and heating etc.. The technical problems that the heating of an original external transmission pipeline consumes power or non-renewable energy such as natural gas and the like, the temperature of prepared hot water is low, and the energy consumption of an oil well water mixing heating system is large in the prior art are solved.
Description
Technical Field
The utility model relates to an utilize renewable energy solar energy to change into heat energy and utilize absorption heat pump to draw the integrated waste heat recovery system of oil field extraction water waste heat belongs to the heat recovery technical field in the energy-concerving and environment-protective.
Background
In the middle and later development stages of high water content and high extraction of oil fields, the existing oil field heat circulating system is characterized in that a phase change heating furnace is used for stably heating crude oil or heating external oil, a steam boiler is used for heating, heat tracing of process facilities, treatment of aging oil and the like, a water heater is used for heating clean water, and hot water is transported for well washing. Wherein the heating furnace in the station uses natural gas as energy source, and the gas source is dry gas output by a natural gas production and marketing plant. The flow of the produced water of the oil field is sufficient, the produced water is directly reinjected into the oil field after the crude oil is separated from oil, gas and water in the oil field united station, a large amount of waste heat is caused, and the concept of energy conservation and environmental protection is not met. Meanwhile, the space of the oil field is large, the solar energy resource is rich, the free area is large, and the clean and renewable solar energy is not effectively and reasonably utilized by the original system.
Aiming at the problems of global environmental pollution, global warming, unreasonable energy structure, resource waste and the like, a great deal of research is carried out on the energy-saving and emission-reducing technology by a plurality of experts at home and abroad. Wherein, the patent 201910227884.7 mentions the utilization of low-temperature waste heat dissipated by cooling of the industrial kiln by arranging an oil circulation loop, an organic Rankine cycle and a water cooling circulation loop. Although the patent utilizes the low-temperature waste heat of the industrial kiln, a considerable part of the waste heat is dissipated through the cooling tower by taking heat conduction oil as a medium, so that waste heat resources are wasted. Patent CN201922498185.4 mentions that lithium bromide solution heat exchange and hot water heat exchange are utilized to combine industrial waste heat recovery, absorption heat pump and salt energy storage technology, and air source heat pump technology is adopted to heat the salt energy storage system and supply heat to users. However, the patent does not consider the problem of frosting of the air source heat pump in a low-temperature environment; when the required heat is large, the heating capacity of the air source heat pump is insufficient, the reliability is poor, and meanwhile, the energy efficiency ratio of the air source heat pump is rapidly reduced in a low-temperature environment.
The scheme of effectively utilizing renewable energy sources, namely solar energy and recycling waste heat is provided, the problems that the energy structure of an oil field is single, the traditional heat supply and heating equipment is old, the system is difficult to optimize, waste heat of produced water of the oil field is wasted and the like can be solved, the environment-friendly requirement of energy conservation and emission reduction is met, and the optimal matching of the net zero emission target of the oil field and the project benefit is considered. The heat pump technology is adopted to extract the heat of the produced water, raise the temperature of the produced water for utilization and replace the existing gas heating furnace and water heating furnace in the station. The oil field waste heat recovery system applying the solar energy and the lithium bromide heat pump has the advantages of energy-saving economic benefit and environmental protection benefit, does not pollute the ecological environment, has simple system principle, reduces the power generation energy consumption, and better responds to the policy requirements of energy conservation and emission reduction in China. Meanwhile, the solar energy resource can be utilized, and the waste heat utilization multi-energy complementation is realized, so that the resource is saved, the emission of atmospheric pollutants is reduced, the safety and environment-friendly management level is improved, and the green development is realized.
Disclosure of Invention
An oil field waste heat recovery system using solar energy and a lithium bromide heat pump is composed of a solar heat collector array 101, a heat storage water tank 102, an underground heat storage system 103, a heat exchange water replenishing tank 104, a circulating water tank 105, an auxiliary heat source 106, a generator 203, a condenser 204, an evaporator 202, an absorber 201, a solution heat exchanger 205, a throttle valve 206, an overflow pipe 207, a temperature difference circulating pump 1001, a temperature circulating pump 1002, a constant temperature circulating pump 1003, a solution pump 1004 and a water replenishing pump 1005.
The solar collector array 101 has one inlet and one outlet, the hot water storage tank 102 has four inlets and four outlets, the underground heat storage system 103 has one inlet and one outlet, the heat exchange makeup tank 104 has two inlets and two outlets, the circulation tank 105 has three inlets and two outlets, the auxiliary heat source 106 has one inlet and one outlet, the generator 203 has two inlets and four outlets, the condenser 204 has two inlets and two outlets, the evaporator 202 has two inlets and two outlets, the absorber 201 has four inlets and two outlets, and the solution heat exchanger 205 has two inlets and two outlets.
An inlet of the solar heat collector array 101 is connected with a first outlet of the hot water storage tank 102, an outlet of the solar heat collector array 101 is connected with a first inlet of the hot water storage tank 102, a second inlet of the hot water storage tank 102 is connected with an outlet of the underground heat storage system 103, a second outlet of the hot water storage tank 102 is connected with an inlet of the underground heat storage system 103, a third inlet of the hot water storage tank 102 is connected with a first outlet of the circulating water tank 105, a third outlet of the hot water storage tank 102 is connected with a first inlet of the circulating water tank 105, a fourth inlet of the hot water storage tank 102 is connected with a first outlet of the heat exchange water replenishing tank 104, an inlet of the auxiliary heat source 106 is connected with a third outlet of the hot water storage tank 102, an outlet of the auxiliary heat source 106 is connected with a third inlet of the circulating water tank 105, a second inlet of the circulating water tank 105 is connected with a first outlet of the generator 203, a second outlet of the circulating water tank 105 is connected with a first inlet of the generator 203, a second inlet of the generator 203 is connected with a first outlet of the solution heat exchanger 205, a second outlet of the generator 203 is connected with a first inlet of the condenser 204, a third outlet of the generator 203 is connected with a third inlet of the absorber 201, a fourth outlet of the generator 203 is connected with a first inlet of the solution heat exchanger 205, a first outlet of the condenser 204 is connected with a first inlet of the evaporator 202, a second inlet of the condenser 204 is connected with a first outlet of the absorber 201, and a first outlet of the evaporator 202 is connected with a fourth inlet of the absorber 201; the second inlet of the absorber 201 is connected with the second outlet of the solution heat exchanger 205, the second outlet of the absorber 201 is connected with the second inlet of the solution heat exchanger 205, and the pipeline connecting the third outlet of the generator 203 with the third inlet of the absorber 201 is an overflow pipe 207.
A method for applying solar energy and a lithium bromide heat pump to an oil field waste heat recovery system comprises water circulation and lithium bromide solution circulation.
Water circulation: the solar heat collector array 101 and the heat storage water tank 102 form a circulating closed circuit, the solar heat collector array 101 absorbs solar energy and converts the solar energy into heat energy, the heat energy flows out of an outlet of the solar heat collector array 101 through medium hot water and then flows into the heat storage water tank 102 from a first inlet of the heat storage water tank 102, the underground heat storage system 103 and the heat storage water tank 102 form a circulating closed circuit, the underground heat storage system 103 stores heat when solar energy resources are rich, and provides heat for the heat storage water tank 102 when the solar energy resources are deficient.
The heat exchange water replenishing tank 104 and the heat storage water tank 102 form a closed circulation circuit for heat exchange between the heat storage water tank 102 and the heat exchange water replenishing tank 104, hot water flows out from a fourth outlet of the heat storage water tank 102 and then flows into the heat exchange water replenishing tank 104 from a first inlet of the heat exchange water replenishing tank 104, the requirement that cold water enters the heat exchange water replenishing tank 104 for absorbing heat is met, and hot water is provided for users.
Cold make-up water enters the heat exchange make-up water tank 104 from a second inlet of the heat exchange make-up water tank 104, and hot water flows out from a second outlet of the heat exchange make-up water tank 104 for use by a user.
The hot-water storage tank 102 and the circulation tank 105 form a loop for the hot-water storage tank 102 to exchange heat with the circulation tank 105, and hot water flows out from the third outlet of the hot-water storage tank 102 and then flows into the circulation tank 105 from the first inlet of the circulation tank 105.
The hot water storage tank 102, the auxiliary heat source 106 and the circulating water tank 105 form a loop, when the water temperature of the circulating water tank 105 does not reach the design temperature, the constant temperature circulating pump 1003 is started, the auxiliary heat source 106 supplements heat to the circulating water tank 105 to reach the design water temperature, when the circulating water tank 105 reaches the design temperature, the constant temperature circulating pump 1003 is closed, and the hot water storage tank 102 directly supplies heat to the circulating water tank 105.
The circulating water tank 105 and the generator 203 form a loop, and hot water in the circulating water tank 105 is used as a high-temperature heat source of the generator 203 to exchange heat with the lithium bromide dilute solution in the generator 203.
The low-temperature waste heat produced water enters the evaporator 202 from the second inlet of the evaporator 202 to exchange heat with the water vapor in the evaporator 202 and then flows out from the second outlet of the evaporator 202.
Cold water required to be heated enters the absorber 201 from a first inlet of the absorber 201 to absorb absorption heat in the absorber 201 and then flows out from a first outlet of the absorber 201, cold water subjected to primary heating flows out from a first outlet of the absorber 201 and then enters the condenser 204 from a second inlet of the condenser 204 to exchange heat with high-temperature water vapor in the condenser 204, and cold water subjected to condensation heat absorption flows out from a second outlet of the condenser 204 to finish secondary heating for users.
And (3) circulating a lithium bromide solution: the lithium bromide dilute solution in the generator 203 absorbs the heat of the high-temperature heat source and is heated and boiled, wherein the water with low boiling point is vaporized into high-pressure water vapor, and the high-pressure water vapor is separated from the absorbent lithium bromide concentrated solution and enters the condenser 204 through a pipeline connected with a second outlet of the generator 203 and a first inlet of the condenser 204.
High-pressure water vapor generated in the generator 203 releases heat to cooling medium cold water in the condenser 204, is condensed into condensed water, flows out of a first outlet of the condenser 204, is decompressed and cooled by the throttle valve 206, enters the evaporator 202 from a first inlet of the evaporator 202, and exchanges heat with low-temperature waste heat produced water to be evaporated into water vapor. The water vapor in the evaporator 202 flows out from the first outlet of the evaporator 202 and enters the absorber 201 from the fourth inlet of the absorber 201, and the low-pressure water vapor generated in the evaporator 202 is continuously absorbed by the strong lithium bromide solution serving as the absorbent in the absorber 201 so as to maintain the low pressure in the evaporator 202. The absorbent lithium bromide concentrated solution absorbs water vapor to form a lithium bromide dilute solution, which flows out from the second outlet of the absorber 201, is pressurized by the solution pump 1004, then enters the solution heat exchanger 205 from the second inlet of the solution heat exchanger 205, exchanges heat with the lithium bromide concentrated solution flowing out of the generator 203, then flows out from the first outlet of the solution heat exchanger 205, and then flows into the generator 203 from the fourth inlet of the generator 203. In the generator 203, the dilute lithium bromide solution absorbs the heat of the high-temperature heat source and boils, water with a low boiling point is vaporized into high-pressure steam and separated from the absorbent lithium bromide to enter the condenser 204, the concentrated lithium bromide solution flows out from the fourth outlet of the generator 203, enters the solution heat exchanger 205 from the first inlet of the solution heat exchanger 205, exchanges heat with the dilute lithium bromide solution, flows out from the second outlet of the solution heat exchanger 205, and then enters the absorber 201 from the second inlet of the absorber 201.
When the passage of the concentrated lithium bromide solution in the solution heat exchanger 205 is blocked by crystallization, the liquid level in the generator 203 rises and the concentrated lithium bromide solution enters the absorber 201 directly through the overflow pipe 207.
A temperature difference circulating pump 1001 is arranged on a pipeline connecting an outlet of the solar heat collector array 101 and a first inlet of the heat storage water tank 102, a temperature circulating pump 1002 is arranged on a pipeline connecting a second outlet of the heat storage water tank 102 and an inlet of the underground heat storage system 103, a constant temperature circulating pump 1003 is arranged on a pipeline connecting an outlet of the auxiliary heat source 106 and a third inlet of the circulating water tank 105, a solution pump 1004 is arranged on a pipeline connecting a second inlet of the solution heat exchanger 205 and a second outlet of the absorber 201, a water replenishing pump 1005 is arranged on a pipeline connecting a cold replenishing water entering a second inlet of the heat exchange water replenishing water tank 104, and a throttle valve 206 is arranged on a pipeline connecting a first inlet of the evaporator 202 and a third outlet of the condenser 204.
The underground heat storage system 103 adopts a water kiln heat storage system, the circulating water tank 105 adopts a square water tank, the heat exchange water supplementing tank 104 adopts a stainless steel water tank, the auxiliary heat source 106 adopts an auxiliary electric heating system or a heat pump and the like, the generator 203 adopts a falling film type generator, the condenser 204 adopts a shell-and-tube heat exchanger, the evaporator 202 adopts a spray type evaporator, the absorber 201 adopts a spray type heat exchanger, and the solution heat exchanger 205 adopts a shell-and-tube heat exchanger.
Drawings
Fig. 1 is a system flow diagram of the present invention.
The reference numbers in fig. 1 refer to: 101. the system comprises a solar heat collector array, 102 heat storage water tanks, 103 underground heat storage systems, 104 heat exchange water replenishing tanks, 105 circulating water tanks, 106 auxiliary heat sources, 201 absorbers, 202 evaporators, 203 generators, 204 condensers, 205 solution heat exchangers, 206 throttle valves, 207 overflow pipes, 1001 temperature difference circulating pumps, 1002 temperature circulating pumps, 1003 constant temperature circulating pumps, 1004 solution pumps and 1005 water replenishing pumps.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The system flow chart of the embodiment is shown in fig. 1, and the oilfield produced water waste heat recovery system of the embodiment includes a solar heat collector array 101, a heat storage water tank 102, an underground heat storage system 103, a heat exchange water replenishing tank 104, a circulation water tank 105, an auxiliary heat source 106, an absorber 201, an evaporator 202, a generator 203, a condenser 204, a solution heat exchanger 205, a throttle valve 206, an overflow pipe 207, a temperature difference circulation pump 1001, a temperature circulation pump 1002, a constant temperature circulation pump 1003, a solution pump 1004, and a water replenishing pump 1005.
When the waste heat recovery system in this example is in operation, the interfaces of the system with the outside include the second inlet of the heat exchange water replenishing tank 104, the second outlet of the heat exchange water replenishing tank 104, the first inlet of the absorber 201, the second inlet of the evaporator 202, and the second outlet of the evaporator 202; cold makeup water flows into the second inlet of the heat exchange water replenishing tank 104, hot water flows out of the second outlet of the heat exchange water replenishing tank 104, cold water required to be used for heating an oil field flows into the first inlet of the absorber 201, cold water required to be used for heating the oil field flows out of the second outlet of the condenser 204, produced water flows into the second inlet of the evaporator 202, and produced water flows out of the second outlet of the evaporator 202; circulating media in the system comprise circulating water, a lithium bromide solution, water vapor and condensed water; wherein circulating water circulates among the solar heat collector array 101, the heat storage water tank 102, the underground heat storage system 103, the heat exchange water replenishing tank 104, the circulating water tank 105 and the auxiliary heat source 106; the lithium bromide solution circulates among the absorber 201, the generator 203 and the solution heat exchanger 205; water vapor circulates between the absorber 201 and the evaporator 202, the generator 203 and the condenser 204; the condensed water circulates between the condenser 204 and the evaporator 202.
The functions of the individual components are as follows:
solar collector array 101: absorb solar radiation and transfer the generated thermal energy to circulating water in the solar collector array 101 to transfer heat to the system;
the hot water storage tank 102: because of the instability of solar energy, the hot water produced by the solar collector array 101 needs to be temporarily stored for use;
underground heat storage system 103: storing solar radiation energy in spring, summer and autumn for use in winter;
heat exchange water replenishing tank 104: providing starting water filling, running water replenishing and user water for the system;
the circulation water tank 105: maintaining a certain amount of circulating hot water, transferring heat to the generator 203;
auxiliary heat source 106: in order to solve the intermittent defect of solar energy, heat is provided for the system when the system is insufficient in heat supply and has faults;
absorber 201: absorbing the low-pressure water vapor generated by the evaporator 202 by using the lithium bromide dilute solution in the absorber 201 to maintain the low pressure in the evaporator 202;
the evaporator 202: causing the condensed water from the condenser 204 to be evaporated into water vapor while absorbing heat in the evaporator 202;
the generator 203: heating and boiling the dilute lithium bromide solution from the absorber 201 in the generator 203, wherein low-boiling-point water vapor is evaporated into water vapor, the water vapor enters the condenser 204 to be separated from the lithium bromide, the dilute lithium bromide solution is concentrated into a concentrated lithium bromide solution, the concentrated lithium bromide solution is decompressed and then returns to the absorber 201, and low-pressure water vapor in the evaporator 202 is absorbed again;
condenser 204: condensing the water vapor from generator 203 to liquid water;
solution heat exchanger 205: the cold weak solution from the absorber 201 exchanges heat with the hot strong solution from the generator 203 in the solution heat exchanger 205;
the throttle valve 206: the water vapor from the generator 203 is condensed into liquid water in the condenser 204, and the liquid water is decompressed and cooled through the throttle valve 206 and enters the evaporator 202;
an overflow pipe 207: when the passage of the concentrated lithium bromide solution in the solution heat exchanger 205 is blocked by crystallization, the liquid level of the generator 203 rises, and the concentrated lithium bromide solution directly enters the absorber 201 through the overflow pipe 207;
temperature difference circulation pump 1001: the operation temperature of the solar thermal collector array 101 is adjusted according to the temperature of the thermal storage water tank 102, when the temperature difference between the solar thermal collector array 101 and the thermal storage water tank 102 is larger than a set temperature, the temperature difference circulating pump 1001 is started, the system operates to transmit heat from the solar thermal collector array 101 to the thermal storage water tank 102, and when the temperature difference is smaller than the set value, the temperature difference circulating pump 1001 stops operating;
temperature circulating pump 1002: stable pressure and flow rate are provided for circulating water in the system, heat storage from the solar heat collection system to the underground heat storage system 103 is completed, and heat is released from the underground heat storage system 103 to the heat storage water tank 102 in cloudy days and in days with poor sunshine intensity;
constant-temperature circulating pump 1003: the mutual switching between the solar heat collection system and the auxiliary heat source 106 is completed, when the temperature of the circulating water in the circulating water tank 105 is reduced to a set low-temperature starting temperature, the auxiliary heat source 106 can start to work to supply heat to the system, and when the temperature of the circulating water in the circulating water tank 105 is increased to a set stopping temperature, the auxiliary heat source 106 stops working, so that the normal heat supply of the system is ensured, and the solar energy is utilized to the maximum extent;
the solution pump 1004: sending the dilute lithium bromide solution from the absorber 201 to the generator 203;
a water replenishing pump 1005: under the condition of insufficient and missing circulating water in the system, secondary water supply is provided.
When the system is in actual operation, the solar heat collector array 101 and the heat storage water tank 102 form a circular closed circuit, and the solar heat collector array 101 collects solar heat to heat circulating water in the solar heat collector array 101 so as to supply heat to the heat storage water tank 102. The underground heat storage system 103 stores heat when solar resources are abundant and provides heat to the heat storage water tank 102 when solar resources are scarce.
The heat storage water tank 102 and the heat exchange water replenishing tank 104 form a circular closed circuit, and the heat storage water tank 102 supplies heat to the heat exchange water replenishing tank 104, so that cold water from the outside enters the heat exchange water replenishing tank 104 to absorb heat, and hot water is supplied to a user. The hot-water storage tank 102 forms a loop with the circulation tank 105 for the hot-water storage tank 102 to supply heat to the circulation tank 105. The hot water storage tank 102, the auxiliary heat source 106 and the circulating water tank 105 form a loop, when the water temperature of the circulating water tank 105 does not reach the design temperature, the constant temperature circulating pump 1003 is started, the auxiliary heat source 106 supplements heat to the circulating water tank 105 to reach the design water temperature, when the circulating water tank 105 reaches the design temperature, the constant temperature circulating pump 1003 is closed, and the hot water storage tank 102 directly supplies heat to the circulating water tank 105.
The circulating water tank 105 and the generator 203 form a circulating closed circuit, and hot water in the circulating water tank 105 is used as a high-temperature heat source to provide heat for the generator 203. When the system is in operation, hot water reaching the designed temperature in the circulating water tank 105 is used as a high-temperature heat source of the generator 203 and exchanges heat with the lithium bromide dilute solution in the generator 203. The lithium bromide dilute solution from the absorber 201 in the generator 203 absorbs the heat of the high-temperature heat source and evaporates into high-temperature water vapor; high-temperature water vapor in the generator 203 enters the condenser 204 to exchange heat with heated cold water and is condensed into condensed water; the condensed water in the condenser 204 is decompressed by the throttle valve 206 and enters the evaporator 202, and exchanges heat with the produced water from the oil field in the evaporator 202, and the waste heat of the produced water in the oil field is utilized for evaporation. The water vapor in the evaporator 202 enters the absorber 201 and is absorbed by the lithium bromide concentrated solution to form a lithium bromide dilute solution, the lithium bromide dilute solution in the absorber 201 exchanges heat with the lithium bromide concentrated solution from the generator 203 through the solution heat exchanger 205, and the lithium bromide dilute solution in the absorber 201 enters the generator 203 and is circulated again as described above. When the passage of the concentrated lithium bromide solution in the solution heat exchanger 205 is blocked by crystallization, the liquid level in the generator 203 rises and the concentrated lithium bromide solution enters the absorber 201 directly through the overflow pipe 207. The cold water required to be heated from the outside enters the absorber 201 to absorb the absorption heat in the absorber 201, the cold water after primary heating enters the condenser 204 after coming out of the absorber 201 to exchange heat with the high-temperature water vapor in the condenser 204, and the cold water is heated for the second time to reach the design temperature for the user to use.
Claims (3)
1. The utility model provides an use oil field waste heat recovery system of solar energy and lithium bromide heat pump which characterized in that:
the system comprises a solar heat collector array (101), a heat storage water tank (102), an underground heat storage system (103), a heat exchange water replenishing tank (104), a circulating water tank (105), an auxiliary heat source (106), a generator (203), a condenser (204), an evaporator (202), an absorber (201), a solution heat exchanger (205), a throttle valve (206), an overflow pipe (207) and the like;
the solar heat collector array (101) is provided with an inlet and an outlet, the heat storage water tank (102) is provided with four inlets and four outlets, the underground heat storage system (103) is provided with an inlet and an outlet, the heat exchange water replenishing tank (104) is provided with two inlets and two outlets, the circulating water tank (105) is provided with three inlets and two outlets, the auxiliary heat source (106) is provided with an inlet and an outlet, the generator (203) is provided with two inlets and four outlets, the condenser (204) is provided with two inlets and two outlets, the evaporator (202) is provided with two inlets and two outlets, the absorber (201) is provided with four inlets and two outlets, and the solution heat exchanger (205) is provided with two inlets and two outlets;
an inlet of a solar heat collector array (101) is connected with a first outlet of a heat storage water tank (102), an outlet of the solar heat collector array (101) is connected with a first inlet of the heat storage water tank (102), a second inlet of the heat storage water tank (102) is connected with an outlet of an underground heat storage system (103), a second outlet of the heat storage water tank (102) is connected with an inlet of the underground heat storage system (103), a third inlet of the heat storage water tank (102) is connected with a first outlet of a circulating water tank (105), a third outlet of the heat storage water tank (102) is connected with a first inlet of the circulating water tank (105), a fourth inlet of the heat storage water tank (102) is connected with a first outlet of a heat exchange water replenishing tank (104), a fourth outlet of the heat storage water tank (102) is connected with a first inlet of the heat exchange water replenishing tank (104), an inlet of an auxiliary heat source (106) is connected with a third outlet of the heat storage water tank (102), and an outlet of the auxiliary heat source (106) is connected with a third inlet of the circulating water tank (105), the second inlet of the circulating water tank (105) is connected with the first outlet of the generator (203), the second outlet of the circulating water tank (105) is connected with the first inlet of the generator (203), the second inlet of the generator (203) is connected with the first outlet of the solution heat exchanger (205), the second outlet of the generator (203) is connected with the first inlet of the condenser (204), the third outlet of the generator (203) is connected with the third inlet of the absorber (201), the fourth outlet of the generator (203) is connected with the first inlet of the solution heat exchanger (205), the first outlet of the condenser (204) is connected with the first inlet of the evaporator (202), the second inlet of the condenser (204) is connected with the first outlet of the absorber (201), the first outlet of the evaporator (202) is connected with the fourth inlet of the absorber (201), the second inlet of the absorber (201) is connected with the second outlet of the solution heat exchanger (205), the second outlet of the absorber (201) is connected with the second inlet of the solution heat exchanger (205), and the pipeline connecting the third outlet of the generator (203) with the third inlet of the absorber (201) is an overflow pipe (207).
2. The oil field waste heat recovery system applying the solar energy and the lithium bromide heat pump as claimed in claim 1, wherein:
a temperature difference circulating pump (1001) is arranged on a pipeline connecting an outlet of the solar heat collector array (101) and a first inlet of the heat storage water tank (102);
a temperature circulating pump (1002) is arranged on a pipeline connecting the second outlet of the heat storage water tank (102) with the inlet of the underground heat storage system (103);
a constant-temperature circulating pump (1003) is arranged on a pipeline connecting an outlet of the auxiliary heat source (106) and a third inlet of the circulating water tank (105);
a solution pump (1004) is arranged on a pipeline connecting a second inlet of the solution heat exchanger (205) and a second outlet of the absorber (201);
a water replenishing pump (1005) is arranged on a pipeline of the cold replenishing water entering the second inlet of the heat exchange water replenishing tank (104);
a throttle valve (206) is arranged on a pipeline connecting a first inlet of the evaporator (202) and a third outlet of the condenser (204).
3. The oil field waste heat recovery system applying the solar energy and the lithium bromide heat pump as claimed in claim 1, wherein:
the underground heat storage system (103) adopts a water kiln heat storage system;
the circulating water tank (105) adopts a square water tank;
the heat exchange water replenishing tank (104) adopts a stainless steel water tank;
the auxiliary heat source (106) adopts an auxiliary electric heating system or a heat pump and the like;
the generator (203) adopts a falling film generator;
the condenser (204) adopts a shell-and-tube heat exchanger;
the evaporator (202) adopts a spray type evaporator;
the absorber (201) adopts a spray type heat exchanger;
the solution heat exchanger (205) adopts a shell-and-tube heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120130911.1U CN214199238U (en) | 2021-01-18 | 2021-01-18 | Oil field waste heat recovery system applying solar energy and lithium bromide heat pump |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120130911.1U CN214199238U (en) | 2021-01-18 | 2021-01-18 | Oil field waste heat recovery system applying solar energy and lithium bromide heat pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503782A (en) * | 2021-01-18 | 2021-03-16 | 南京工业大学 | Oil field waste heat recovery system and method applying solar energy and lithium bromide heat pump |
| CN117006734A (en) * | 2023-07-24 | 2023-11-07 | 中建三局集团有限公司 | Three-phase absorption type heat storage system |
-
2021
- 2021-01-18 CN CN202120130911.1U patent/CN214199238U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112503782A (en) * | 2021-01-18 | 2021-03-16 | 南京工业大学 | Oil field waste heat recovery system and method applying solar energy and lithium bromide heat pump |
| CN112503782B (en) * | 2021-01-18 | 2024-07-19 | 南京工业大学 | Oilfield waste heat recovery system and method applying solar energy and lithium bromide heat pump |
| CN117006734A (en) * | 2023-07-24 | 2023-11-07 | 中建三局集团有限公司 | Three-phase absorption type heat storage system |
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