Comprehensive utilization system for photo-thermal and oil field waste heat

Abstract

The invention discloses a photo-thermal and oil field waste heat comprehensive utilization system, and relates to the field of oil field energy conservation, and the photo-thermal and oil field waste heat comprehensive utilization system comprises a photo-thermal heat collection system, a sewage waste heat exchange system, a heat supply heat exchange system and a circulation pipeline system; the circulating pipeline system comprises a first circulating loop and a second circulating loop; the photo-thermal heat collection system communicates with the heat supply and heat exchange system through a first circulation loop, and the photo-thermal heat collection system is used for heating medium water in the first circulation loop through photo-thermal energy and then conveying the medium water to the heat supply and heat exchange system; the sewage waste heat exchange system communicates with the heat supply and heat exchange system through a second circulation loop, and the sewage waste heat exchange system is used for heating medium water in the second circulation loop through sewage heat and then conveying the medium water to the heat supply and heat exchange system; the circulation pipeline system has a photo-thermal working state, a waste heat working state and a comprehensive working state. The technical process that the photo-thermal heat collection system and the waste heat system are connected in parallel is adopted to meet the heat use requirement of oil field production.

Description

Technical Field

[0001] The present invention relates to the technical field of oil field energy conservation, and in particular to a photothermal and oil field waste heat comprehensive utilization system. Background Art

[0002] As some major oilfields in my country enter the middle and late stages of development, the water content of produced fluids reaches approximately 90%. The daily wastewater treatment volume is enormous, with temperatures ranging from 30-80°C. This represents a valuable waste heat resource, reaching approximately one million cubic meters per day. Recycling this large amount of waste heat from oilfield wastewater can significantly reduce energy consumption and improve economic efficiency. Oilfields that can utilize waste heat for heating not only improve their thermal load utilization, reduce energy consumption, conserve water, and enhance the economic efficiency of their operations, but also achieve significant economic and social benefits. However, relying solely on waste heat from oilfields for heating can be insufficient to meet high heating demand, necessitating the need for alternative energy supply methods to bridge this heating gap. Summary of the Invention

[0003] The main purpose of the present invention is to provide a comprehensive utilization system of solar thermal energy and oil field waste heat, which aims to meet the production heat demand of oil field stations by adopting a process flow of parallel connection between the solar thermal collection system and the waste heat system based on the heating characteristics of the solar thermal collection system and the heat use form in the oil field station.

[0004] To achieve the above objectives, the present invention proposes a solar thermal and oilfield waste heat comprehensive utilization system, which includes a solar thermal collection system, a sewage waste heat exchange system, a heat supply and heat exchange system, and a circulation pipeline system; the circulation pipeline system includes a first circulation loop and a second circulation loop;

[0005] The photothermal heat collection system is connected to the heat supply and heat exchange system through the first circulation loop. The photothermal heat collection system is used to collect photothermal energy and use the photothermal energy to heat the medium water in the first circulation loop and then transport it to the heat supply and heat exchange system.

[0006] The waste heat exchange system for sewage is connected to the heat supply and heat exchange system through the second circulation loop. The waste heat exchange system for sewage is used to collect heat from sewage and use the heat from sewage to heat the medium water in the second circulation loop before transferring the heat to the heat supply and heat exchange system.

[0007] The circulation pipeline system can be switched between the photothermal working state, the waste heat working state and the comprehensive working state; when the circulation pipeline system is in the photothermal working state, the first circulation loop is in the flow state and the second circulation loop is in the blocked state; when the circulation pipeline system is in the waste heat working state, the second circulation loop is in the flow state and the first circulation loop is in the blocked state; when the circulation pipeline system is in the comprehensive working state, both the first circulation loop and the second circulation loop are in the flow state.

[0008] Optionally, the circulation pipeline system includes a first tee pipe and a second tee pipe;

[0009] The first tube body of the first tee is connected to the medium outlet of the heat supply and heat exchange system, the second tube body of the first tee is connected to the first tube body of the second tee and the medium inlet of the solar thermal collection system, and the third tube body of the first tee is connected to the first tube body of the second tee and the medium inlet of the sewage waste heat module;

[0010] The first tube body of the second tee is connected to the medium inlet of the heat supply and heat exchange system, the second tube body of the second tee is connected to the first tube body of the second tee and the medium inlet of the solar thermal collection system, and the third tube body of the first tee is connected to the first tube body of the second tee and the medium inlet of the sewage waste heat module;

[0011] Among them, the first tube body of the first tee, the second tube body of the first tee, the second tube body of the second tee and the first tube body of the second tee together form the first circulation loop; the first tube body of the first tee, the third tube body of the first tee, the third tube body of the second tee and the first tube body of the second tee together form the second circulation loop.

[0012] Optionally, the heat supply and heat exchange system includes a dehydration module, a doping module, a first heat exchanger, and a second heat exchanger; the first heat exchanger and the second heat exchanger are arranged in parallel; the first heat exchanger is used to transfer the heat of the medium water to the dehydration module; the second heat exchanger is used to transfer the heat of the medium water to the doping module;

[0013] The first tube body of the first tee pipe is connected to the medium inlet of the first heat exchanger and the medium inlet of the second heat exchanger;

[0014] The first tube body of the second three-way tube is connected to the medium outlet of the first heat exchanger and the medium outlet of the second heat exchanger.

[0015] Optionally, the circulation pipeline system further includes a first regulating valve and a second regulating valve, wherein the first regulating valve is arranged on the second pipe body of the first three-way pipe, and the second regulating valve is arranged on the second pipe body of the second three-way pipe.

[0016] Optionally, the circulation pipeline system further includes a first circulation pump, which is arranged in the first pipe body of the first three-way pipe.

[0017] Optionally, the photothermal heat collection system includes a photothermal collector, a photothermal water tank, and a photothermal circulation loop;

[0018] The photothermal collector is connected to the photothermal water tank through the photothermal circulation loop. The photothermal collector is used to collect photothermal energy and use the photothermal energy to heat the circulating medium of the photothermal circulation loop and then transport it to the photothermal water tank. The photothermal water tank is used to realize heat exchange between the circulating medium and the medium water.

[0019] Optionally, the photothermal heat collection system further includes a second circulation pump, which is arranged in the photothermal circulation loop.

[0020] Optionally, the sewage waste heat exchange system includes a first heat pump, a water inlet pipe and a first water outlet pipe, the first heat pump includes a first evaporator and a first condenser, the water inlet of the first evaporator is connected to the water inlet pipe, and the water outlet of the first evaporator is connected to the first water outlet pipe; the condenser is connected to the heat supply and heat exchange system through the second circulation loop.

[0021] Optionally, the sewage waste heat exchange system further includes a second heat pump and a second water outlet pipe, the second heat pump includes a second evaporator and a second condenser, the water inlet of the second evaporator is connected to the first water outlet pipe, and the water outlet of the second evaporator is connected to the second water outlet pipe; wherein:

[0022] The circulation piping system further includes a third circulation loop; the heat supply and heat exchange system further includes a third heat exchanger and a heating module; the third circulation loop is arranged between the third heat exchanger and the second condenser, and the third heat exchanger is used to transfer the heat of the medium water in the third circulation loop to the heating module; and / or

[0023] The circulation piping system also includes a fourth circulation loop; the heat supply and heat exchange system also includes a fourth heat exchanger and a backwash module; the fourth circulation loop is arranged between the fourth heat exchanger and the second condenser, and the fourth heat exchanger is used to transfer the heat of the medium water in the fourth circulation loop to the backwash module.

[0024] Optionally, the solar thermal and oilfield waste heat comprehensive utilization system further includes a water replenishment module connected to the circulation pipeline system, and the water replenishment module is used to replenish the medium water for the circulation pipeline system.

[0025] The photothermal and oilfield waste heat comprehensive utilization system of the present application includes a photothermal heat collection system, a sewage waste heat exchange system, a heat supply and heat exchange system and a circulation pipeline system; on the one hand, the medium water in the circulation pipeline system can be heated by utilizing the photothermal heat collection system and transported to the heat supply and heat exchange system; on the other hand, high-temperature sewage discharged from the oil field is received, and the thermal energy in the high-temperature sewage is transported to the heat supply and heat exchange system through the sewage waste heat exchange system. When the heat provided by the solar thermal collection system can meet the process heat demand of the oilfield station, the solar thermal collection system can be used alone to supply heat to the heat supply and heat exchange system, that is, the circulation pipeline system is switched to the solar thermal working state; on rainy days, the operating efficiency of the solar thermal collection system is very low, so the second circulation loop is opened alone, and the solar thermal collection system and the sewage waste heat exchange system are used to supply heat to the heat supply and heat exchange system at the same time; when it is sunny, the heat provided by the solar thermal collection system cannot meet the process heat demand of the oilfield station, then the circulation pipeline system is switched to the comprehensive working state, and the solar thermal collection system and the sewage waste heat exchange system are used to supply heat to the heat supply and heat exchange system at the same time. Therefore, the solar thermal and oilfield waste heat comprehensive utilization system of the present application not only realizes the coordinated utilization of two clean energy sources, saves resources, is environmentally friendly, but also can meet the heating needs of the oilfield station. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0027] Figure 1 This is a schematic diagram of an embodiment of the solar thermal and oilfield waste heat comprehensive utilization system provided in this application.

[0028] Description of Figure Numbers:

[0029]

[0030]

[0031] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, the descriptions of "first", "second", etc. in the present invention are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0035] Waste heat from oilfield wastewater is a form of geothermal energy and, like solar energy, a clean energy source. Existing thermal steam production methods consume significant amounts of fossil energy and emit pollutants, reducing net energy production and jeopardizing sustainable energy development. Therefore, the abundant solar energy and waste heat from oilfield wastewater could partially replace fossil energy.

[0036] For this reason, see Figure 1 The present invention provides a system 100 for comprehensive utilization of solar thermal energy and oilfield waste heat, which aims to meet the production heat demand of oilfield stations by adopting a process flow of connecting the solar thermal collection system 1 and the waste heat system in parallel based on the heating characteristics of the solar thermal collection system 1 and the heat use form in the oilfield station.

[0037] The present invention discloses a photothermal and oilfield waste heat comprehensive utilization system 100, comprising a photothermal heat collection system 1, a sewage waste heat exchange system 3, a heat supply and heat exchange system 4 and a circulation pipeline system 2; the circulation pipeline system 2 comprises a first circulation loop 21 and a second circulation loop 22; the photothermal heat collection system 1 is connected to the heat supply and heat exchange system 4 through the first circulation loop 21, the photothermal heat collection system 1 is used to collect photothermal energy, and use the photothermal energy to heat the medium water in the first circulation loop 21 and then transport it to the heat supply and heat exchange system 4; the sewage waste heat exchange system 3 is connected to the heat supply and heat exchange system 4 through the second circulation loop 22, and the sewage waste heat exchange system 3 is used to collect sewage heat. The heat of the sewage is used to heat the medium water in the second circulation loop 22 and then transport it to the heat supply and heat exchange system 4; the circulation piping system 2 can be switched between the photothermal working state, the waste heat working state and the comprehensive working state; when the circulation piping system 2 is in the photothermal working state, the first circulation loop 21 is in a flow state and the second circulation loop 22 is in a blocked state; when the circulation piping system 2 is in the waste heat working state, the second circulation loop 22 is in a flow state and the first circulation loop 21 is in a blocked state; when the circulation piping system 2 is in the comprehensive working state, both the first circulation loop 21 and the second circulation loop 22 are in a flow state.

[0038] The photothermal and oilfield waste heat comprehensive utilization system 100 of the present application includes a photothermal heat collection system 1, a sewage waste heat exchange system 3, a heat supply and heat exchange system 4 and a circulation pipeline system 2; on the one hand, the photothermal heat collection system 1 can be used to heat the medium water in the circulation pipeline system 2 and transport it to the heat supply and heat exchange system 4; on the other hand, high-temperature sewage discharged from the oil field is received, and the thermal energy in the high-temperature sewage is transported to the heat supply and heat exchange system 4 through the sewage waste heat exchange system 3. When the heat provided by the solar thermal collection system 1 can meet the process heat demand of the oil field station, the solar thermal collection system 1 can be used alone to provide heat for the heat supply and heat exchange system 4, that is, the circulation pipeline system 2 is switched to the solar thermal working state; on rainy days, the operating efficiency of the solar thermal collection system 1 is very low, then the second circulation loop 22 is opened alone, and the solar thermal collection system 1 and the sewage waste heat exchange system 3 are used to simultaneously provide heat for the heat supply and heat exchange system 4; when it is sunny, the heat provided by the solar thermal collection system 1 cannot meet the process heat demand of the oil field station, then the circulation pipeline system 2 is switched to the comprehensive working state, and the solar thermal collection system 1 and the sewage waste heat exchange system 3 are used to simultaneously provide heat for the heat supply and heat exchange system 4. Therefore, the solar thermal and oil field waste heat comprehensive utilization system 100 of the present application not only realizes the coordinated utilization of two clean energy sources, saves resources, is environmentally friendly, but also can meet the heating needs of the oil field station.

[0039] It will be appreciated that the aforementioned circulation piping system 2 is typically used to transport fluids or gases, and is commonly found in industrial production. Such a system typically includes pipes, valves, pumps, and other accessories to control the flow direction, velocity, and pressure of the fluid or gas. The first circulation loop 21 or the second circulation loop 22 typically refers to the route along which the fluid or gas in the circulation piping system 2 circulates. Within the circulation loop, the fluid or gas circulates through pipes, pumps, valves, and other equipment to achieve heat transfer and exchange.

[0040] Furthermore, in order to reduce the number of pipes in the circulation piping system 2 and rationally plan the piping layout, please continue to refer to Figure 1 In one embodiment of the present application, the circulation pipeline system 2 includes a first tee and a second tee; the first tube body of the first tee is connected to the medium outlet of the heat supply and heat exchange system 4, the second tube body of the first tee is connected to the first tube body of the second tee and the medium inlet of the solar thermal collection system 1, and the third tube body of the first tee is connected to the first tube body of the second tee and the medium inlet of the sewage waste heat module; the first tube body of the second tee is connected to the medium inlet of the heat supply and heat exchange system 4, the second tube body of the second tee is connected to the first tube body of the second tee and the medium inlet of the solar thermal collection system 1, and the third tube body of the first tee is connected to the first tube body of the second tee and the medium inlet of the sewage waste heat module; wherein, the first tube body of the first tee, the second tube body of the first tee, the second tube body of the second tee and the first tube body of the second tee together form a first circulation loop 21; the first tube body of the first tee, the third tube body of the first tee, the third tube body of the second tee and the first tube body of the second tee together form a second circulation loop 22. In this way, the sewage waste heat module and the solar thermal collector module are arranged in parallel via the first and second tees, which not only jointly provide energy for the heat supply and heat exchange system 4, improving energy utilization efficiency, but also reducing the number of pipes laid and lowering energy consumption costs. In other embodiments of the present application, the first circulation loop 21 and the second circulation loop 22 can also be provided with separate pipes.

[0041] To facilitate control of the flow direction of the medium water in the circulation piping system 2, in one embodiment of the present application, the circulation piping system 2 further includes a first regulating valve 23 and a second regulating valve 24. The first regulating valve 23 is located in the second pipe body of the first tee, and the second regulating valve 24 is located in the second pipe body of the second tee. When the circulation piping system 2 is in the solar thermal operating state, the solar thermal collector system 1 is turned on, and the first regulating valve 23 and the second regulating valve 24 are both open. When the circulation piping system 2 is in the residual heat operating state, the solar thermal collector system 1 is turned off, the first regulating valve 23 and the second regulating valve 24 are closed, and the wastewater waste heat exchange system 3 is turned on. When the circulation piping system 2 is in the comprehensive operating state, the solar thermal collector system 1 is turned on, the wastewater waste heat exchange system 3 is turned on, and the first regulating valve 23 and the second regulating valve 24 are opened. The valve body structure of the above-mentioned first regulating valve 23 and second regulating valve 24 can refer to the stop valve, plunger valve, etc. in the prior art, as long as it can block the flow channel. In other embodiments, the three-way pipe can also be designed as a three-way valve, and the three-way valve can be used to achieve circulation in different flow channels to save manufacturing costs. No specific explanation is given here. Furthermore, in order to facilitate the realization of automatic control, the first regulating valve 23 and the second regulating valve 24 can be solenoid valves, which are closed and opened through the control module of the solar thermal and oilfield waste heat comprehensive utilization system 100, which can improve production efficiency.

[0042] Furthermore, in one embodiment of the present application, the circulation piping system 2 further includes a first circulation pump 25, which is disposed in the first pipe body of the first tee. The circulation pump is a key device for circulating the medium water in the circulation piping system 2 to achieve heat energy transfer. The circulation pump is typically installed in the pipeline and can provide the required fluid pressure and flow to ensure the normal operation of the piping system.

[0043] Taking into account the heat demand of the oil field site, in one embodiment of the present application, the heat supply and heat exchange system 4 includes a dehydration module 44, a blending module 45, a first heat exchanger 41 and a second heat exchanger 42; the first heat exchanger 41 and the second heat exchanger 42 are arranged in parallel; the first heat exchanger 41 is used to transfer the heat of the medium water to the dehydration module 44; the second heat exchanger 42 is used to transfer the heat of the medium water to the blending module 45; the first tube body of the first three-way pipe connects the medium inlet of the first heat exchanger 41 and the medium inlet of the second heat exchanger 42; the first tube body of the second three-way pipe connects the medium outlet of the first heat exchanger 41 and the medium outlet of the second heat exchanger 42. A heat exchanger is a device used to transfer heat from one substance to another. In the heat supply and heat exchange system 4, the medium water needs to exchange heat with the oily water delivered by the dehydration module 44 and the oily wastewater delivered by the blending module 45. Therefore, the first heat exchanger 41 and the second heat exchanger 42 can use oil-water heat exchangers to achieve the heat exchange function. The oil-water heat exchanger is a heat exchange device used to transfer heat between oil and water. It is usually composed of two independent fluid circulation systems. The medium water flows in one system, and the other system flows in another system. The two fluids contact through the heat exchange surface in the heat exchanger, thereby achieving heat transfer. Therefore, in the dehydration module 44, the oily water is sent to the side of the first heat exchanger 41 for heat exchange. After the heat exchange, the high-temperature water-containing oil enters the next process flow for dehydration and circulates in sequence. In the blending module 45, the oily wastewater is sent to the primary side of the second heat exchanger 42 for heat exchange. After the heat exchange, the oily wastewater enters the next process flow and circulates in sequence.

[0044] Specifically, in one embodiment of the present application, the solar thermal collection system 1 includes a solar thermal collector 11, a solar thermal water tank 12, and a solar thermal circulation loop 13; the solar thermal collector 11 is connected to the solar thermal water tank 12 through the solar thermal circulation loop 13, and the solar thermal collector 11 is used to collect solar thermal energy, and use the solar thermal energy to heat the circulating medium of the solar thermal circulation loop 13 and then transport it to the solar thermal water tank 12, and the solar thermal water tank 12 is used to achieve heat exchange between the circulating medium and the medium water. Specifically, in the solar thermal collection system 1, a plurality of linear Fresnel reflectors are used to first reflect sunlight onto a secondary concentrator located above the solar thermal collector 11, and then further converge it onto the solar thermal collector 11 to heat the circulating medium in the solar thermal circulation loop 13. The circulating medium is usually a liquid (such as water, oil) or a gas (such as air). The heated circulating medium exchanges heat with the medium water in the solar thermal water tank 12.

[0045] In one embodiment of the present application, the solar thermal collection system 1 further includes a second circulation pump 14, which is provided in the solar thermal circulation loop 13. The circulation pump is a key device for circulating the circulating medium in the solar thermal circulation loop 13 to achieve the transfer of the circulating medium and provide the required fluid pressure and flow.

[0046] Considering that the heat from sewage cannot meet heating needs, in one embodiment of the present application, the sewage waste heat exchange system 3 includes a first heat pump 31, a water inlet pipe 32, and a first water outlet pipe 33. The first heat pump 31 includes a first evaporator 312 and a first condenser 311. The water inlet of the first evaporator 312 is connected to the water inlet pipe 32, and the water outlet of the first evaporator 312 is connected to the first water outlet pipe 33. The condenser is connected to the heat supply and heat exchange system 4 via a second circulation loop 22. Using a heat pump to extract heat from oilfield station sewage, low-grade energy is upgraded to high-grade energy, partially or completely replacing gas boilers, further meeting the production and domestic heating needs of the oilfield station.

[0047] Furthermore, in one embodiment of the present application, the sewage waste heat exchange system 3 further includes a second heat pump 34 and a second outlet pipe 35. The second heat pump 34 includes a second evaporator 342 and a second condenser 341. The water inlet of the second evaporator 342 is connected to the first outlet pipe 33, and the water outlet of the second evaporator 342 is connected to the second outlet pipe 35. The circulation piping system 2 further includes a third circulation loop 26. The heat supply and heat exchange system 4 further includes a third heat exchanger 43 and a heating module 46. The third circulation loop 26 is arranged between the third heat exchanger 43 and the second condenser 341. The third heat exchanger 43 is used to transfer heat from the medium water in the third circulation loop 26 to the heating module 46. The third heat exchanger 43 is generally a plate heat exchanger, which is a heat exchange device commonly used in heating systems for transferring heat between fluids. The use of a plate heat exchanger can provide a comfortable indoor temperature for the heating module 46. The plate heat exchanger is composed of a series of parallel metal plates, which form a series of narrow channels between these plates. Fluids flow in these channels and exchange heat. Through the plate heat exchanger, the heat of the medium water exchanged by the sewage waste heat exchange module can be transferred to the indoor heating system, thereby achieving a heating effect. In other embodiments, the circulation pipeline system 2 also includes a fourth circulation loop 26; the heat supply heat exchange system 4 also includes a fourth heat exchanger 43 and a backwash module 46; the fourth circulation loop 26 is arranged between the fourth heat exchanger 43 and the second condenser 341, and the fourth heat exchanger 43 is used to transfer the heat of the medium water in the fourth circulation loop 26 to the backwash module 46. The backwash module 46 is generally used for cleaning and maintaining oil-water heat exchangers, solar thermal collectors or other similar equipment. The fourth heat exchanger 43 can be used to effectively increase the temperature of the water, more effectively remove dirt and sediment in the pipeline, and maintain the efficient operation of the heat exchanger or other equipment.

[0048] Taking into account that during the operation of the system, the medium water in the system will gradually decrease due to evaporation, leakage or other reasons, in one embodiment of the present application, the solar thermal and oilfield waste heat comprehensive utilization system 100 also includes a water replenishment module 5 connected to the circulation pipeline system 2, and the water replenishment module 5 is used to replenish the medium water for the circulation pipeline system 2. The water replenishment module 5 needs to add medium water to the system regularly or as needed to replenish the lost fluid volume or adjust the fluid concentration of the system to maintain the normal operation of each heat exchange system. The water replenishment module 5 is usually connected to the circulation pipeline system 2 through a pipeline to ensure that the medium water can smoothly enter the circulation pipeline system 2. The water replenishment module 5 usually includes components such as a water tank, a pump, a control valve, and a sensor. By controlling the pump and valve in the water replenishment module 5, precise control of the system fluid volume can be achieved to ensure that the medium water in the system is always maintained at an appropriate level. In addition, the water replenishment module 5 can also monitor the fluid parameters in the system, such as pressure, temperature, etc., through sensors to adjust the water replenishment amount and fluid concentration in a timely manner.

[0049] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A solar thermal and oilfield waste heat comprehensive utilization system, characterized in that: The solar thermal and oilfield waste heat comprehensive utilization system includes a solar thermal collection system, a sewage waste heat exchange system, a heat supply and heat exchange system, and a circulation pipeline system; the circulation pipeline system includes a first circulation loop and a second circulation loop; The photothermal heat collection system is connected to the heat supply and heat exchange system through the first circulation loop. The photothermal heat collection system is used to collect photothermal energy and use the photothermal energy to heat the medium water in the first circulation loop and then transport it to the heat supply and heat exchange system. The waste heat exchange system for sewage is connected to the heat supply and heat exchange system through the second circulation loop. The waste heat exchange system for sewage is used to collect heat from sewage and use the heat from sewage to heat the medium water in the second circulation loop before transferring the heat to the heat supply and heat exchange system. The circulation pipeline system can be switched between the photothermal working state, the waste heat working state and the comprehensive working state; when the circulation pipeline system is in the photothermal working state, the first circulation loop is in the flow state and the second circulation loop is in the blocked state; when the circulation pipeline system is in the waste heat working state, the second circulation loop is in the flow state and the first circulation loop is in the blocked state; when the circulation pipeline system is in the comprehensive working state, both the first circulation loop and the second circulation loop are in the flow state.

2. The solar thermal and oilfield waste heat comprehensive utilization system according to claim 1, characterized in that: The circulation pipeline system includes a first tee pipe and a second tee pipe; The first tube body of the first tee is connected to the medium outlet of the heat supply and heat exchange system, the second tube body of the first tee is connected to the first tube body of the second tee and the medium inlet of the solar thermal collection system, and the third tube body of the first tee is connected to the first tube body of the second tee and the medium inlet of the sewage waste heat module; The first tube body of the second tee is connected to the medium inlet of the heat supply and heat exchange system, the second tube body of the second tee is connected to the first tube body of the second tee and the medium inlet of the solar thermal collection system, and the third tube body of the first tee is connected to the first tube body of the second tee and the medium inlet of the sewage waste heat module; Among them, the first tube body of the first tee, the second tube body of the first tee, the second tube body of the second tee and the first tube body of the second tee together form the first circulation loop; the first tube body of the first tee, the third tube body of the first tee, the third tube body of the second tee and the first tube body of the second tee together form the second circulation loop.

3. The solar thermal and oilfield waste heat comprehensive utilization system according to claim 2, characterized in that: The heat supply and heat exchange system includes a dehydration module, a blending module, a first heat exchanger and a second heat exchanger; the first heat exchanger and the second heat exchanger are arranged in parallel; the first heat exchanger is used to transfer the heat of the medium water to the dehydration module; the second heat exchanger is used to transfer the heat of the medium water to the blending module; The first tube body of the first tee pipe is connected to the medium inlet of the first heat exchanger and the medium inlet of the second heat exchanger; The first tube body of the second three-way tube is connected to the medium outlet of the first heat exchanger and the medium outlet of the second heat exchanger.

4. The solar thermal and oilfield waste heat comprehensive utilization system according to claim 2, characterized in that: The circulation pipeline system further includes a first regulating valve and a second regulating valve. The first regulating valve is provided in the second pipe body of the first three-way pipe, and the second regulating valve is provided in the second pipe body of the second three-way pipe.

5. The solar thermal and oilfield waste heat comprehensive utilization system according to claim 2, characterized in that: The circulation pipeline system further includes a first circulation pump, which is arranged in the first pipe body of the first three-way pipe.

6. The solar thermal and oilfield waste heat comprehensive utilization system according to claim 1, characterized in that: The photothermal heat collection system includes a photothermal heat collector, a photothermal water tank and a photothermal circulation loop; The photothermal collector is connected to the photothermal water tank through the photothermal circulation loop. The photothermal collector is used to collect photothermal energy and use the photothermal energy to heat the circulating medium of the photothermal circulation loop and then transport it to the photothermal water tank. The photothermal water tank is used to realize heat exchange between the circulating medium and the medium water.

7. The solar thermal and oilfield waste heat comprehensive utilization system according to claim 6, characterized in that: The photothermal heat collection system further includes a second circulation pump, which is arranged in the photothermal circulation loop.

8. The solar thermal and oilfield waste heat comprehensive utilization system according to claim 1, characterized in that: The sewage waste heat exchange system includes a first heat pump, a water inlet pipe and a first water outlet pipe. The first heat pump includes a first evaporator and a first condenser. The water inlet of the first evaporator is connected to the water inlet pipe, and the water outlet of the first evaporator is connected to the first water outlet pipe; the condenser is connected to the heat supply and heat exchange system through the second circulation loop.

9. The solar thermal and oilfield waste heat comprehensive utilization system according to claim 8, characterized in that: The sewage waste heat exchange system further includes a second heat pump and a second water outlet pipe. The second heat pump includes a second evaporator and a second condenser. The water inlet of the second evaporator is connected to the first water outlet pipe, and the water outlet of the second evaporator is connected to the second water outlet pipe. The circulation piping system further includes a third circulation loop; the heat supply and heat exchange system further includes a third heat exchanger and a heating module; the third circulation loop is arranged between the third heat exchanger and the second condenser, and the third heat exchanger is used to transfer the heat of the medium water in the third circulation loop to the heating module; and / or The circulation piping system also includes a fourth circulation loop; the heat supply and heat exchange system also includes a fourth heat exchanger and a backwash module; the fourth circulation loop is arranged between the fourth heat exchanger and the second condenser, and the fourth heat exchanger is used to transfer the heat of the medium water in the fourth circulation loop to the backwash module.

10. The solar thermal and oilfield waste heat comprehensive utilization system according to claim 1, characterized in that: The solar thermal and oilfield waste heat comprehensive utilization system also includes a water replenishment module connected to the circulation pipeline system, and the water replenishment module is used to replenish the medium water for the circulation pipeline system.

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