Steam generator for oil field and steam car

Abstract

The invention discloses a steam generator for an oil field and a steam car, and relates to the field of oil field exploitation auxiliary equipment.The steam generator comprises an oil tank which contains heat conduction oil and communicates with a circulating oil pipe through a circulating pump; an aqueous solution is contained in the water tank, and the water tank communicates with a water outlet pipe through a pressure pump; the combustion chamber is located at the position close to an oil outlet of the oil tank and can heat conduction oil in the circulating oil pipe to the set temperature. The heat exchanger is arranged on the circulating oil pipe and the water outlet pipe in a penetrating manner, so that the water solution in the water outlet pipe exchanges heat with the heated conduction oil in the circulating oil pipe and is heated into water vapor; the nozzle assembly is arranged at the tail end of the water outlet pipe and can spray water vapor to the needed position. The control system is electrically connected with the combustion chamber, the circulating pump and the pressure pump and used for controlling opening and closing of the combustion chamber, the circulating pump and the pressure pump. According to the steam car carrying the steam generator for the oil field, fuel consumption can be reduced while needed steam can be generated.

Description

Technical Field

[0001] The present invention relates to the technical field of oilfield mining auxiliary equipment, in particular to a steam generator and a steam car for oilfields. Background Art

[0002] Oilfield steam vehicles are vehicles with efficient steam generation systems that can generate large amounts of high-temperature steam. They are often designed to play a role in some process links in oilfields, such as cleaning, unblocking, and preheating oil well pipelines and equipment. The thermal effect of steam is used to improve the production conditions of oil wells, remove impurities or wax deposits in pipelines, etc., so as to improve the efficiency and effectiveness of oilfield exploitation.

[0003] Existing steam cars generate steam by heating water with oil-fired boilers. During use, the oil-fired boilers need to run continuously for a long time, which directly leads to a significant increase in fuel consumption and thus increases costs. In addition, the oil-fired boilers equipped in steam cars belong to the category of special equipment. According to relevant regulations, they must be strictly inspected every year. This process not only makes the company bear the corresponding inspection costs, but also causes equipment downtime, bringing the company a significant economic and time cost.

[0004] Therefore, there is an urgent need to design a technical solution that can generate the required steam while reducing fuel consumption and does not require annual inspection. Summary of the invention

[0005] The object of the present invention is to provide a steam generator and a steam car for oil fields, so as to solve the problems existing in the above-mentioned prior art, and to reduce fuel consumption while generating the required steam.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] The present invention provides a steam generator for oil fields, comprising:

[0008] An oil tank containing heat transfer oil and connected to a circulating oil pipe via a circulating pump;

[0009] A water tank containing an aqueous solution and connected to a water outlet pipe via a pressure pump;

[0010] A combustion chamber, located near the oil outlet of the oil tank, capable of heating the heat transfer oil in the circulating oil pipe to a set temperature;

[0011] The heat exchanger is arranged on the circulating oil pipe and the water outlet pipe, and can make the aqueous solution in the water outlet pipe exchange heat with the heated heat transfer oil in the circulating oil pipe and heat it to steam;

[0012] A nozzle assembly, disposed at the end of the water outlet pipe, capable of spraying water vapor to a desired location;

[0013] The control system is electrically connected to the combustion chamber, the circulation pump and the booster pump respectively, and is used to control the opening and closing of the combustion chamber, the circulation pump and the booster pump.

[0014] Preferably, an exhaust port is provided on the top of the oil tank.

[0015] Preferably, a thermometer and a liquid level gauge are provided on the oil tank, a thermometer is provided on the water tank, and the liquid level gauge and the two thermometers are electrically connected to the control system respectively.

[0016] Preferably, the circulating oil pipe and the water outlet pipe are both provided with a pressure gauge and an electromagnetic control valve, and the pressure gauge and the electromagnetic control valve are respectively connected to the control system.

[0017] Preferably, a stainless steel coil is provided around the outer side of the water tank, the circulating oil pipe passes through the heat exchanger and is connected to the inlet of the stainless steel coil, and the outlet of the stainless steel coil is connected to the oil inlet of the oil tank through an oil return pipe.

[0018] Preferably, the nozzle assembly comprises a spray pipe connected to the end of the water outlet pipe, a spray head is provided at the end of the spray pipe, and an electromagnetic control valve is provided at a position of the spray pipe close to the spray head.

[0019] Preferably, one side of the injection pipe is connected to the water tank through a return pipe, and an electromagnetic control valve is provided at the position where the return pipe and the injection pipe are connected.

[0020] Preferably, the combustion chamber can heat the heat transfer oil in the circulating oil pipe to 150°C to 200°C.

[0021] Preferably, a thermometer is provided on the injection pipe, and the thermometer is connected to the control system.

[0022] The present invention further provides a steam vehicle, comprising a vehicle body, on which the above-mentioned oil field steam generator is provided.

[0023] Compared with the prior art, the present invention has achieved the following technical effects:

[0024] The present invention abandons the traditional oil-fired boiler and adopts the method of heating the heat transfer oil in the combustion chamber, and utilizes the heat transfer oil to exchange heat with the aqueous solution, so that the aqueous solution is heated and vaporized into steam. Since there is no need to use an oil-fired boiler, the steam vehicle is successfully exempted from inspection, which effectively improves the safety and convenience of the equipment, and also reduces maintenance costs and regulatory burdens.

[0025] The control system of the present invention can start heating the heat transfer oil accurately when the actual demand for steam is generated, that is, when it is monitored that the steam temperature drops below the set value, the combustion chamber is started to heat the heat transfer oil; and heat is exchanged with the aqueous solution to produce steam of the required temperature, avoiding the oil consumption problem caused by long-term idling of traditional oil-fired boilers, thereby greatly reducing the overall oil consumption level, effectively improving energy utilization efficiency, and enhancing market competitiveness. 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 drawings required for use in the embodiments will be briefly introduced below. 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 these drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the arrangement of a steam generator for oil fields in one or some embodiments of the present invention.

[0028] In the figure: 1-oil tank, 2-water tank, 3-thermometer, 4-exhaust port, 5-pressure gauge, 6-circulation pump, 7-boosting pump, 8-electromagnetic control valve, 9-combustion chamber, 10-heat exchanger, 11-stainless steel coil, 12-circulating oil pipe, 13-water outlet pipe, 14-return pipe, 15-injection pipe, 16-nozzle, 17-control system. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] The object of the present invention is to provide a steam generator and a steam car for oil fields, so as to solve the problems existing in the above-mentioned prior art, and to reduce fuel consumption while generating the required steam.

[0031] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0032] At present, traditional oil field steam vehicles generally use fuel oil boilers to directly heat water solution to form the required steam. Traditional fuel oil boilers are special equipment, which have high requirements for operators and require regular annual inspections. In addition, in order to ensure that traditional fuel oil boilers can produce steam efficiently during operation, they often need to continue to operate for a long time, which will undoubtedly consume a lot of fuel, resulting in energy waste and increased costs. In order to solve the above problems, the present invention provides a steam generator for oil fields, such as Figure 1 As shown, it includes an oil tank 1, a water tank 2, a combustion chamber 9, a nozzle assembly and a heat exchanger 10. The oil tank 1 contains heat transfer oil, and is connected to a circulation oil pipe 12 through a circulation pump 6; the water tank 2 contains aqueous solution, and is connected to a water outlet pipe 13 through a pressure pump 7; the combustion chamber 9 is located near the oil outlet of the oil tank 1, and the circulation oil pipe 12 passes through the combustion chamber 9, so that after the combustion chamber 9 is started, the circulation oil pipe 12 passing through the combustion chamber 9 can be heated, and the heat transfer oil in the circulation oil pipe 12 can be heated. Heat to the set temperature; in order to reduce heat loss, the heat exchanger 10 is located close to the combustion chamber 9, and the water outlet pipe 13 and the heated circulating oil pipe 12 pass through the heat exchanger 10, and heat exchange is realized in the heat exchanger 10, so that the aqueous solution in the water outlet pipe 13 can be heat-exchanged with the heated heat-conducting oil in the circulating oil pipe 12, and the temperature is increased and vaporized into water vapor, and the heat-conducting oil after heat exchange is returned to the oil tank 1 for reuse; the water outlet pipe 13 and the circulating oil pipe 12 are alternately distributed, which increases the heat exchange area. In order to ensure the safety of the oil tank 1, an exhaust port 4 is provided on the top of the oil tank 1 to avoid excessive pressure in the oil tank 1; the water vapor is evenly sprayed out in a fine spray form through the nozzle assembly at the end of the water outlet pipe 13, thereby efficiently releasing the absorbed heat to the surrounding environment, achieving the purpose of heat transfer and utilization of the entire system, ensuring the stable and efficient operation of the system, and meeting the needs of the corresponding process or actual application scenarios. Since the present invention eliminates the need for a fuel oil boiler, it does not require regular annual inspections and is easy to operate. In order to reduce energy consumption, the present invention is also provided with a control system 17, which is electrically connected to the combustion chamber 9, the circulating pump 6 and the booster pump 7, respectively, and is used to control the opening and closing of the combustion chamber 9, the circulating pump 6 and the booster pump 7. In order to achieve precise control, the oil tank 1 of this embodiment is provided with a thermometer 3 and a liquid level gauge, and the water tank 2 is provided with a thermometer 3, and the liquid level gauge and the two thermometers 3 are electrically connected to the control system 17, respectively. The circulating oil pipe 12 and the water outlet pipe 13 are both provided with a pressure gauge 5 and an electromagnetic control valve 8, and the pressure gauge 5 and the electromagnetic control valve 8 are respectively connected to the control system 17. The control system 17 can accurately start heating the thermal oil to produce steam when the actual demand for steam is generated, avoiding the oil consumption problem caused by long-term idling of traditional boilers, thereby greatly reducing the overall oil consumption level.

[0033] The present invention uses a combustion chamber 9 to directly heat the heat transfer oil. The combustion chamber 9 is a fuel heating device. Heat is generated by burning diesel. The diesel burns in the combustion chamber 9 to heat the heat transfer oil, and then the heat is transferred to the heat transfer oil that needs to be heated. The supply of fuel required for combustion in the combustion chamber 9 is provided by the fuel tank of the original steam car. The combustion chamber 9 belongs to the existing structure, and its combustion is started and stopped by the microprocessor single-chip microcomputer in the control system, which belongs to the existing structure, thereby abolishing the traditional fuel boiler structure, and by accurately heating part of the circulating oil pipe 12, the fuel consumption is greatly reduced, and many complex and vulnerable parts in the traditional fuel boiler are removed, making the maintenance work simple and easy, no longer relying on the frequent intervention of professional and technical personnel, and the enterprise can independently complete daily maintenance, significantly reducing the maintenance cost and downtime caused by equipment failure, and improving the overall production efficiency. In addition, the present invention abandons the special equipment of the fuel boiler, and does not need to go through the cumbersome annual inspection process, which not only avoids the loss of equipment downtime caused by inspection, but also eliminates the related inspection cost expenditure and the potential rectification cost caused by failure of inspection.

[0034] During the operation of the existing steam generator, heating devices such as oil boilers are always in the working process. Even after the steam temperature of the steam generator reaches the required value, the oil boiler is still in the working state, causing the traditional oil boiler to consume too much oil due to long-term idling. The present invention solves the problems of the traditional solution. The control system of the present invention receives the data of the thermometer and pressure sensor at the steam generator and the data of the liquid level gauge in the water tank and the mailbox through the single-chip microcomputer of the existing structure. Based on the reading and processing of the collected temperature, pressure, liquid level and other data, it can drive the circulation pump and the booster pump to start and stop, and control the ignition device of the combustion chamber 9 to realize ignition, and control the actions of the actuator switch such as the electromagnetic control valve. The present invention monitors the liquid level, temperature, pressure, etc. of the oil tank and water tank in real time, as well as the pressure of the circulating oil pipe and the pressure of the water outlet pipe, and automatically starts and stops the combustion chamber, the circulating pump and the booster pump according to the steam demand, thereby avoiding energy loss of structures such as the combustion chamber. That is, when the steam temperature or pressure value is monitored to meet the required set value, the control system can control the ignition device of the combustion chamber 9 to be turned off, so that the combustion chamber stops working, or control the amount of fuel entering to change the combustion amount of the combustion chamber 9. When the steam temperature is monitored to be too low, the ignition device of the combustion chamber 9 is restarted, and there is no need to keep the combustion chamber 9 running continuously, thereby avoiding energy loss. When over-temperature, over-pressure or low liquid level is monitored, an alarm is triggered or the system is shut down to ensure system safety.

[0035] In order to further improve the utilization rate of heat and effectively realize the utilization of the residual heat of the heat transfer oil after heat exchange, in one embodiment, a stainless steel coil 11 is arranged around the outer side of the water tank 2, and the circulating oil pipe 12 passes through the heat exchanger 10 and is connected with the inlet of the stainless steel coil 11, and the outlet of the stainless steel coil 11 is connected with the oil inlet of the oil tank 1 through the return oil pipe, so that the residual heat of the heat transfer oil after heat exchange is utilized to preheat the aqueous solution in the water tank 2, thereby improving the energy utilization rate.

[0036] The heat exchange medium of the present invention adopts heat transfer oil, whose professional name is organic heat carrier or heat medium oil, which plays an indispensable role in many industrial production links. The circulating oil pipe 12 of the present invention mainly transports the heat transfer oil in a specific state to the combustion chamber 9 accurately through the circulating pump 6. In the combustion chamber 9, the heat transfer oil will be strongly heated by the high-temperature heat source, so that its own temperature will rise rapidly, thereby accumulating a large amount of thermal energy. Then, the heated high-temperature heat transfer oil will flow into the heat exchanger 10, where it will undergo an efficient heat exchange process with water. In this process, the heat carried by the heat transfer oil will be quickly transferred to the low-temperature water, so that the temperature of the water can be significantly increased, thereby laying a solid foundation for subsequent steam generation or other heat utilization links. After the heat transfer through the heat exchanger 10, the heat transfer oil still carries a certain amount of residual heat. At this time, the heat transfer oil will continue to flow to the stainless steel coil 11 outside the water tank 2. Inside the stainless steel coil 11, the heat transfer oil will perform the final heat exchange with the water in the water tank 2 until most of the heat it carries is transferred to the water in the water tank 2, thereby completing the preheating process of the water in the water tank 2, fully improving the energy utilization efficiency and reducing energy waste. After completing this series of heat transfer processes, the heat transfer oil will flow back to the oil tank 1 and wait for the start of the next cycle. This reciprocating cycle continuously provides stable and reliable heat transfer services for industrial heat exchange processes.

[0037] During the entire circulation process, the thermal oil not only successfully completes the heat transfer task of the steam, ensuring the stability and efficiency of the steam supply in industrial production, but also cleverly utilizes the waste heat it carries to preheat the water in the water tank 2 in advance, making the entire energy utilization system more complete and optimized, and providing strong support for energy conservation, emission reduction and stable operation in the industrial production process.

[0038] When it is necessary to stop the steam injection, the present invention also designs a return pipe 14 for returning excess water at the injection pipe 15 to the water tank 2. Its layout structure is that one side of the injection pipe 15 is connected to the water tank 2 through the return pipe 14, and an electromagnetic control valve 8 is provided at the connection position between the return pipe 14 and the injection pipe 15.

[0039] The present invention also provides a steam car, including a car body, on which the above-mentioned steam generator for oil fields is arranged. When working, the steam car moves to the working area, and then the circulating pump 6 drives the heat transfer oil in the oil tank 1 to flow into the combustion chamber 9 through the circulating oil pipe 12, and is heated to a specific temperature range of 150°C to 200°C in this area. Then, the heated heat transfer oil enters the heat exchanger 10 to efficiently transfer heat with water, and then is cooled by the stainless steel coil 11 outside the water tank 2, and finally flows back to the oil tank 1. When the water in the water tank 2 flows through the heat exchanger 10, it fully exchanges heat with the high-temperature heat transfer oil, and quickly vaporizes after absorbing a large amount of heat. The vaporized water vapor is transported to the nozzle 16 under the powerful power of the booster pump 7, and is uniformly sprayed out in the form of fine spray, so as to efficiently release the absorbed heat to the surrounding environment, realize the purpose of heat transfer and utilization of the entire system, ensure the stable and efficient operation of the system, and meet the needs of the corresponding process or actual application scenario.

[0040] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A steam generator for oil fields, characterized in that: include: An oil tank containing heat transfer oil and connected to a circulating oil pipe via a circulating pump; A water tank containing an aqueous solution and connected to a water outlet pipe via a pressure pump; A combustion chamber, located near the oil outlet of the oil tank, capable of heating the heat transfer oil in the circulating oil pipe to a set temperature; The heat exchanger is arranged on the circulating oil pipe and the water outlet pipe, and can make the aqueous solution in the water outlet pipe exchange heat with the heated heat transfer oil in the circulating oil pipe and heat it to steam; A nozzle assembly, disposed at the end of the water outlet pipe, capable of spraying water vapor to a desired location; The control system is electrically connected to the combustion chamber, the circulation pump and the booster pump respectively, and is used to control the opening and closing of the combustion chamber, the circulation pump and the booster pump.

2. The oil field steam generator according to claim 1, characterized in that: An exhaust port is arranged on the top of the oil tank.

3. The oil field steam generator according to claim 1, characterized in that: The oil tank is provided with a thermometer and a liquid level gauge, the water tank is provided with a thermometer, and the liquid level gauge and the two thermometers are electrically connected to the control system respectively.

4. The oil field steam generator according to claim 1, characterized in that: The circulating oil pipe and the water outlet pipe are both provided with a pressure gauge and an electromagnetic control valve, and the pressure gauge and the electromagnetic control valve are respectively connected to the control system.

5. The oil field steam generator according to claim 1, characterized in that: A stainless steel coil is arranged around the outer side of the water tank. The circulating oil pipe passes through the heat exchanger and is communicated with the inlet of the stainless steel coil. The outlet of the stainless steel coil is communicated with the oil inlet of the oil tank through an oil return pipe.

6. The oil field steam generator according to claim 1, characterized in that: The nozzle assembly comprises a spray pipe connected with the end of the water outlet pipe, a spray head is arranged at the end of the spray pipe, and an electromagnetic control valve is arranged at a position of the spray pipe close to the spray head.

7. The oil field steam generator according to claim 6, characterized in that: One side of the injection pipe is connected to the water tank through a return pipe, and an electromagnetic control valve is provided at the position where the return pipe and the injection pipe are connected.

8. The oil field steam generator according to claim 1, characterized in that: The combustion chamber can heat the heat transfer oil in the circulating oil pipe to 150° C. to 200° C.

9. The oil field steam generator according to claim 6, characterized in that: The injection pipe is provided with a thermometer, and the thermometer is connected to the control system.

10. A steam vehicle, characterized in that: The vehicle comprises a vehicle body, on which is arranged the steam generator for oil fields as claimed in any one of claims 1 to 9.

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