Gas-electricity dual-purpose water jacket heating device for oil field

Abstract

The utility model discloses a gas-electricity dual-purpose water jacket heating device for an oil field. The gas-electricity dual-purpose water jacket heating device comprises a combustion furnace body, a fire cylinder and an electric heating water tank, the combustion furnace body can achieve liquid exchange with the electric heating water tank, and therefore the technical effects that the fire cylinder can be used for gas heating, the electric heating water tank can be used for electric heating, and the fire cylinder and the electric heating water tank can be used for mixed heating at the same time are achieved. The three heating modes are intelligently switched through an intelligent device according to the field use condition, the problems of remote part of well sites, fuel shortage and emission indexes of emissions are solved, and when the electric heating mode is adopted, zero emission of oxycarbide and nitric oxide of the whole device is achieved; when the fuel gas and electric energy heating mode is adopted, the emission amount of oxycarbide and nitric oxide of the fuel gas part can be reduced, meanwhile, the two kinds of energy are used in a combined mode, the heating time is shortened, and the heating efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of oilfield surface equipment, and particularly relates to a gas-electric dual-purpose water jacket heating device for oilfields. Background Technique

[0002] Oilfield heating devices play a crucial role in the petroleum industry. Their main function is to provide heat for oilfields to improve the fluidity of crude oil, reduce viscosity, increase the filling coefficient of pumps, and ensure the stable transportation of oil and gas. According to different requirements and application scenarios, oilfield heating devices can adopt various technical means and equipment forms. Electric heating technology is used for the exploitation of special conditions such as heavy oil wells and high-wax wells in oilfield heating; intermediate frequency induction heating technology directly heats the oil pipe through an intermediate frequency power supply to reduce the viscosity of crude oil and increase fluidity; a natural gas heating furnace is a heating device that heats an object or fluid by the heat energy generated by burning natural gas.

[0003] A water jacket heating furnace is an indirect heating device widely used in oil and gas fields, consisting of a cylinder body, flue pipes, gas coils, and other accessories. Its internal structure includes components such as a metal shell, a fire tube, and furnace tubes. The water jacket heating furnace is mainly used to heat well-produced substances such as crude oil or natural gas and control its temperature fluctuation within a certain range. Its main function is to heat the water in the water jacket by burning fuel, and then use water as a heat transfer medium to indirectly heat the medium in the furnace tubes, thereby achieving the required temperature. This indirect heating method avoids direct contact with the flame, reduces the risk of scaling and corrosion, and extends the service life of the equipment. With the increasingly strict emission requirements for nitrogen oxides and carbon oxides, existing fuel heating devices no longer meet the usage requirements. Therefore, a gas-electric dual-purpose water jacket heating device that can make up for the defects of pure fuel water jacket heating furnaces is proposed. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a gas-electric dual-purpose water jacket heating device for oilfields to overcome the deficiencies of a single heating mode and large emissions in the prior art.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] An oilfield gas-electric dual-purpose water jacket heating device includes a combustion furnace body for heating the incoming liquid, which is the so-called water jacket, that is, the outer shell of the water jacket heating furnace. It is rolled into a cylindrical structure by boiler steel plates, which can protect the internal components while also withstanding a certain internal pressure and temperature, and can accommodate a certain volume of water. A fire tube is arranged at the lower part inside the combustion furnace body. The fire tube is the combustion space and radiation heating surface of the water jacket heating furnace, and it is one of the ways to heat the heat exchange water in the furnace body of this device. It is a cylindrical structure rolled by boiler steel plates. The length of the fire tube is greater than the length of the combustion furnace body and penetrates through the two side walls of the combustion furnace body. A burner is installed on one side of the fire tube, and the fuel is sprayed into the fire tube through the burner for combustion to heat the water in the water jacket. An exchange heat coil is arranged at the upper part inside the combustion furnace body. The coil adopts an indirect heating method of an oil flow coil immersed in the water jacket to prevent crude oil coking. There are an incoming liquid inlet and an incoming liquid outlet on the exchange heat coil. The coil is formed by welding a group of serpentine tubes, and the medium is heated by the hot water and steam in the water jacket when passing through it. An electric heating water tank is connected above the outer part of the combustion furnace body. The electric heating water tank is another way to heat the heat exchange water in the furnace body of this device. A resistance heater is arranged at the lower part inside the electric heating water tank, and the heat exchange water is radiantly heated through the resistance heater.

[0007] An electric heating hot water pipeline and a return water pipeline are also connected between the combustion furnace body and the electric heating water tank. The electric heating hot water pipeline is used to transport the electrically heated water from the electric heating water tank to the combustion furnace body, and the return water pipeline is used to transport the heat exchange water in the combustion furnace body that does not meet the working conditions due to temperature reduction to the electric heating water tank for heating treatment. One end of the electric heating hot water pipeline is fixedly connected to the side wall of the combustion furnace body through a flange and is located above the exchange heat coil, and the other end of the electric heating hot water pipeline is fixedly connected to the side wall of the electric heating water tank through a flange and is located below the resistance heater; one end of the return water pipeline is fixedly connected to the bottom of the combustion furnace body through a flange, and the other end is fixedly connected to the top of the electric heating water tank through a flange.

[0008] Furthermore, a make-up water pipeline and a sewage pipeline are arranged below the combustion furnace body. The combustion furnace body is connected with a make-up water valve through the make-up water pipeline, and the combustion furnace body is connected with a sewage valve through the sewage pipeline. Both the make-up water valve and the sewage valve are connected to the intelligent control device. The make-up water valve is opened when make-up water operation is required, and the sewage valve is opened when sewage operation is required.

[0009] Further, the liquid inlet and liquid outlet of the heat exchange coil extend outside the combustion furnace body, facilitating connection with the oil inlet pipeline and the oil outlet pipeline. The liquid inlet and liquid outlet of the heat exchange coil both extend from the side of the combustion furnace body where no burner is arranged; on the liquid inlet pipeline, a liquid inlet valve, a first pressure transmitter, a first pressure gauge, a first temperature transmitter, and a first thermometer are successively arranged, and the first thermometer is located on the side close to the combustion furnace body; on the liquid outlet pipeline, a liquid outlet valve, a second pressure transmitter, a second pressure gauge, a second temperature transmitter, and a second thermometer are successively arranged, and the second thermometer is located on the side close to the combustion furnace body.

[0010] Further, on the electric heating hot water pipeline, a first water outlet valve, a third pressure transmitter, a third pressure gauge, a third temperature transmitter, and a third thermometer are successively arranged, and the third thermometer is close to the electric heating water tank side. The outer surface of the electric heating hot water pipeline is coated with a heat preservation device.

[0011] Further, on the return water pipeline, a second water outlet valve, a circulation water pump, a check valve, a third water outlet valve, a fourth pressure transmitter, a fourth pressure gauge, a fourth temperature transmitter, and a fourth thermometer are successively arranged, and the fourth thermometer is on the side of the connection port of the electric heating water tank. The outer surface of the return water pipeline is coated with a heat preservation device.

[0012] Further, the first thermometer is connected to the first temperature transmitter, and the first pressure gauge is connected to the first pressure transmitter; the second thermometer is connected to the second temperature transmitter, and the second pressure gauge is connected to the second pressure transmitter; the third thermometer is connected to the third temperature transmitter, and the third pressure gauge is connected to the third pressure transmitter; the fourth thermometer is connected to the fourth temperature transmitter, and the fourth pressure gauge is connected to the fourth pressure transmitter.

[0013] Further, the device also includes an intelligent control device, which is connected to the burner, the water replenishing valve, the first temperature transmitter, the first pressure transmitter, the second temperature transmitter, the second pressure transmitter, the first water outlet valve, the third pressure transmitter, the third temperature transmitter, the second water outlet valve, the circulation water pump, the third water outlet valve, the fourth pressure transmitter, the fourth temperature transmitter, the liquid level transmitter, and the resistance heater. Through the intelligent control device, precise control is carried out on water replenishing operation, temperature control, heat exchange water heating, and sewage discharge operation, realizing a constant temperature, unattended, and high-precision automatic control mode.

[0014] Further, the control end of the resistance heater extends outside the wall of the electric heating water tank and is fixedly connected to the wall of the electric heating water tank through a flange.

[0015] Further, a reinforcing rib plate is provided at the fixed flange of the electric heating water tank.

[0016] Further, the device also includes an expansion water tank, which is arranged above the electric heating water tank. The barrel wall of the expansion water tank is provided with a liquid level window and a liquid level transmitter, and an atmospheric connection hole is also provided at the top of the expansion water tank.

[0017] Compared with the prior art, the utility model has the following beneficial technical effects:

[0018] The utility model relates to an oilfield gas-electric dual-purpose water jacket heating device, which includes a combustion furnace body, a fire tube and an electric heating water tank. The heat exchange water in the combustion furnace body can be heated by gas through the fire tube and the burner arranged on the fire tube, or the heat exchange water can be heated by the electric heating water tank and the resistance heater in the electric heating water tank, or the electric heating water tank and the fire tube can be heated simultaneously. There are three heating modes: gas, electric energy, and gas and electric energy. The three modes are intelligently switched by the intelligent device according to the on-site usage situation, solving the problems of remote well sites, fuel shortage, and emission indexes of emissions; when using the electric heating mode, the carbon oxides and nitrogen oxides of the whole device are zero-emission; when using the gas and electric energy heating modes, the emissions of carbon oxides and nitrogen oxides in the gas part can be reduced, and at the same time, the two energy sources are used jointly, shortening the heating time and improving the heating efficiency. At the same time, an electric heating hot water pipeline and a return water pipeline are used to connect between the combustion furnace body and the electric heating water tank, making the electric heating water tank an independent operation unit, and enabling the water jacket heating device to operate in three modes: electric heating, gas heating, and electric and gas combined heating; the existing gas heating furnaces that have been put into use can also be transformed according to this method, with low transformation difficulty, small workload, and low cost.

[0019] Further, the device arranges the liquid inlet and liquid outlet of the heat exchange coil on the side of the combustion furnace body where no burner is arranged. By arranging the oil pipeline and the burner on both sides of the combustion furnace body respectively, it is avoided that the worker is obstructed by the oil pipeline when operating the burner, and the worker is not affected by the burner when connecting the oil pipeline. This design conforms to the ergonomic design principle and significantly improves the user experience and comfort of the worker operating the device.

[0020] Further, the reasonable arrangement of the instruments and meters ensures the hot water circulation in the device, enabling the heating medium to be output according to the set temperature and pressure.

[0021] Further, the device is also provided with an intelligent control device, which can accurately control the water replenishment operation, temperature control, heat exchange water heating, and sewage discharge operation, thereby achieving energy conservation and emission reduction. At the same time, through intelligent control, the production process and resource allocation are optimized, the operating thermal efficiency of the heating furnace is improved, the combustion and heat transfer processes in the furnace are strengthened, the temperature in the furnace tends to be uniform, and the heating capacity and heating quality are improved.

[0022] Furthermore, an expansion tank is provided to maintain the pressure stability of the device system. When the pressure fluctuates, it can expand or contract automatically, playing a buffering role. At the same time, a liquid level window and a liquid level transmitter are provided to timely supplement the lost water volume into the device and ensure the water volume balance of the device. Brief Description of the Drawings

[0023] Figure 1 It is an overall schematic diagram of an oilfield gas-electric dual-purpose water jacket heating device in an embodiment of the present invention.

[0024] In the figure, 1, burner; 2, combustion furnace body; 3, fire tube; 4, heat exchange coil; 5, make-up water valve; 6, blowdown valve; 7, first thermometer; 8, first temperature transmitter; 9, first pressure gauge; 10, first pressure transmitter; 11, incoming liquid inlet valve; 12, second thermometer; 13, second temperature transmitter; 14, second pressure gauge; 15, second pressure transmitter; 16, incoming liquid outlet valve; 17, first water outlet valve; 18, third pressure transmitter; 19, third pressure gauge; 20, third temperature transmitter; 21, third thermometer; 22, heat preservation device; 23, second water outlet valve; 24, circulation water pump; 25, check valve; 26, third water outlet valve; 27, fourth pressure transmitter; 28, fourth pressure gauge; 29, fourth temperature transmitter; 30, fourth thermometer; 31, expansion tank; 32, liquid level window and liquid level transmitter; 33, electric heating water tank; 34, resistance heater; 35, intelligent control device; 36, make-up water pipeline; 37, blowdown pipeline; 38, incoming liquid inlet; 39, incoming liquid outlet; 40, electric heating hot water pipeline; 41, return water pipeline; 42, atmosphere connection hole. Detailed Embodiments

[0025] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0026] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of the present utility model are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0027] As Figure 1 Shown is a schematic diagram of the overall structure of an oilfield gas-electric dual-purpose water jacket heating device in an embodiment of the present utility model, which includes a combustion furnace body 2 for heating the incoming liquid, which is rolled into a cylindrical structure by boiler steel plates, protecting the internal components while being able to withstand a certain internal pressure and temperature, and can accommodate a certain volume of water.

[0028] Preferably, a make-up water pipeline 36 and a blowdown pipeline 37 are arranged below the combustion furnace body 2. The combustion furnace body 2 is connected to a make-up water valve 5 through the make-up water pipeline 36, and the combustion furnace body 2 is connected to a blowdown valve 6 through the blowdown pipeline 37. The make-up water valve 5 and the blowdown valve 6 are electric valves, and both are connected to an intelligent control device 35, and the intelligent control device 35 controls the opening and closing of the make-up water valve 5 and the blowdown valve 6.

[0029] Preferably, a fire tube 3 is arranged at the lower part inside the combustion furnace body 2, and the structure of the fire tube 3 is a corrugated furnace liner. The length of the fire tube 3 is greater than the length of the combustion furnace body 2 and penetrates through the two side walls of the combustion furnace body 2. A burner 1 is installed on one side of the fire tube 3, and fuel is sprayed into the fire tube 3 through the burner 1 for combustion to heat the water in the water jacket.

[0030] Preferably, a heat exchange coil 4 is arranged at the upper part inside the combustion furnace body 2, and its heat exchange area is determined by the heating power; the coil adopts an indirect heating method of an oil-flowing coil immersed in a water jacket to prevent the crude oil from coking. The coil is formed by welding a group of serpentine pipes. There are a liquid inlet 38 and a liquid outlet 39 on the coil, and both extend out from the side of the combustion furnace body 2 where the burner 1 is not arranged and extend outside the combustion furnace body 2. The liquid inlet 38 is connected to an oil inlet pipeline, and the liquid outlet 39 is connected to an oil outlet pipeline. When the medium passes through it, it is heated by the hot water and steam in the water jacket. A liquid inlet valve 11, a first pressure transmitter 10, a first pressure gauge 9, a first temperature transmitter 8 and a first thermometer 7 are successively arranged on the pipeline of the liquid inlet 38, and the first thermometer 7 is located on the side close to the combustion furnace body 2; a liquid outlet valve 16, a second pressure transmitter 15, a second pressure gauge 14, a second temperature transmitter 13 and a second thermometer 12 are successively arranged on the pipeline of the liquid outlet 39, and the second thermometer 12 is located on the side close to the combustion furnace body 2.

[0031] Preferably, an electric heating water tank 33 is installed above the combustion furnace body 2. The electric heating water tank 33 is another way to heat the heat exchange water in the furnace body of this device. A resistance heater 34 is arranged below the interior of the electric heating water tank 33, and the heat exchange water is radiantly heated by the resistance heater 34. The control end of the resistance heater 34 extends outside the wall of the electric heating water tank 33 and is fixedly connected to the wall of the electric heating water tank 33 through a flange. Reinforcing rib plates are arranged on the wall of the electric heating water tank 33.

[0032] Preferably, the electric heating water tank 33 is installed on the combustion furnace body 2 through a support mechanism, and the support mechanism is a support leg or an additional platform.

[0033] Preferably, an expansion water tank 31 is arranged above the electric heating water tank 33, and the expansion water tank 31 is connected to the electric heating water tank 33 through a flange. A liquid level sight glass and a liquid level transmitter 32 are arranged on the barrel wall of the expansion water tank 31, and an atmospheric connection hole 42 is also arranged at the top of the expansion water tank 31. The expansion water tank 31 maintains the pressure stability in the entire water jacket heating device system. When the pressure fluctuates, the expansion or contraction space of the expansion water tank 31 plays a buffering role. At the same time, a liquid level sight glass and a liquid level transmitter 32 are provided, which can observe the internal situation and timely supplement the lost water volume into the water jacket heating device to ensure the water volume balance of the water jacket heating device.

[0034] Preferably, an electrically heated hot water pipeline 40 is connected between the combustion furnace body 2 and the electrically heated water tank 33, which is used to transport the electrically heated water from the electrically heated water tank 33 to the combustion furnace body 2. One end of the electrically heated hot water pipeline 40 is fixedly connected to the side wall of the combustion furnace body 2 through a flange and is located above the heat exchange coil 4. The other end of the electrically heated hot water pipeline 40 is fixedly connected to the side wall of the electrically heated water tank 33 through a flange and is located below the resistance heater 34. A first water outlet valve 17, a third pressure transmitter 18, a third pressure gauge 19, a third temperature transmitter 20, and a third thermometer 21 are successively arranged on the electrically heated hot water pipeline 40, and the third thermometer 21 is on the side close to the electrically heated water tank 33.

[0035] Preferably, a return water pipeline 41 is connected between the combustion furnace body 2 and the electrically heated water tank 33, which is used to transport the heat exchange water in the combustion furnace body 2 that does not meet the working conditions due to temperature reduction to the electrically heated water tank 33 for heating treatment. One end of the return water pipeline 41 is fixedly connected to the bottom of the combustion furnace body 2 through a flange, and the other end is fixedly connected to the top of the electrically heated water tank 33 through a flange. A second water outlet valve 23, a circulation pump 24, a check valve 25, a third water outlet valve 26, a fourth pressure transmitter 27, a fourth pressure gauge 28, a fourth temperature transmitter 29, and a fourth thermometer 30 are successively arranged on the return water pipeline 41, and the fourth thermometer 30 is on the side of the connection port of the electrically heated water tank 33.

[0036] Preferably, by connecting the electrically heated hot water pipeline 40 and the return water pipeline 41 between the combustion furnace body 2 and the electrically heated water tank 33, the electrically heated water tank 33 can become an independent operation unit, enabling the water jacket heating device to operate in three modes: electric heating, gas heating, and combined electric and gas heating.

[0037] Preferably, heat insulation devices 22 are coated on the outer surfaces of the electrically heated hot water pipeline 40 and the return water pipeline 41, and the heat insulation devices 22 are electric tracing or heat insulation cotton or heat insulation shells.

[0038] Preferably, the first thermometer 7 is connected to the first temperature transmitter 8, and the first pressure gauge 9 is connected to the first pressure transmitter 10; the second thermometer 12 is connected to the second temperature transmitter 13, and the second pressure gauge 14 is connected to the second pressure transmitter 15; the third thermometer 21 is connected to the third temperature transmitter 20, and the third pressure gauge 19 is connected to the third pressure transmitter 18; the fourth thermometer 30 is connected to the fourth temperature transmitter 29, and the fourth pressure gauge 28 is connected to the fourth pressure transmitter 27.

[0039] Preferably, the device further includes an intelligent control device 35, which is connected to the burner 1, the water replenishing valve 5, the first temperature transmitter 8, the first pressure transmitter 10, the second temperature transmitter 13, the second pressure transmitter 15, the first water outlet valve 17, the third pressure transmitter 18, the third temperature transmitter 20, the second water outlet valve 23, the circulating water pump 24, the third water outlet valve 26, the fourth pressure transmitter 27, the fourth temperature transmitter 29, the liquid level transmitter, and the resistance heater 34. The intelligent control device 35 precisely controls the water replenishing operation, temperature control, heat exchange water heating, and sewage discharge operation, realizing a constant temperature, unattended, and high-precision automatic control mode.

[0040] Embodiment 1:

[0041] In this embodiment, an oilfield gas-electric dual-purpose water jacket heating device is heated by electric energy. The intelligent control device 35 sends out signals, and the first water outlet valve 17, the second water outlet valve 23, and the third water outlet valve 26 are automatically opened. The liquid inlet valve 11 and the liquid outlet valve 16 are opened. The liquid from the well site or station enters the heat exchange coil 4 from the liquid inlet 38. The intelligent control device 35 detects the temperature and pressure of the incoming liquid through the connected first temperature transmitter 8 and first pressure transmitter 10. The circulating water pump 24 operates to transport the water in the furnace body to the electric heating water tank 33. The fourth pressure transmitter 27 and the fourth temperature transmitter 29 feedback the detected pressure and temperature to the intelligent control device 35. The resistance heater 34 is powered on to heat up the water with a lower temperature. When the water temperature rises to the set temperature, it is transported to the combustion furnace body 2 through the electric heating hot water pipeline 40. The third temperature transmitter 20 and the third pressure transmitter 18 feedback the detected water temperature and pressure to the intelligent control device 35. The water with an increased temperature in the combustion furnace body 2 exchanges heat through the heat exchange coil 4 with a lower temperature. The heat exchange coil 4 with an increased temperature then exchanges heat with the incoming liquid with a lower temperature. The incoming liquid after heat exchange finally flows out through the liquid outlet 39. The second temperature transmitter 13 and the second pressure transmitter 15 feedback the temperature and pressure detected by the second thermometer 12 and the second pressure gauge 14 to the intelligent control device 35. The water with a decreased temperature is then transported to the electric heating water tank 33 by the circulating water pump 24, and so on.

[0042] Embodiment 2:

[0043] In this embodiment, an oilfield gas-electric dual-purpose water jacket heating device is heated by gas and electricity. The intelligent control device 35 sends out signals, and the first water outlet valve 17, the second water outlet valve 23, and the third water outlet valve 26 are automatically opened. The liquid inlet valve 11 and the liquid outlet valve 16 are opened. The liquid from the well site or station enters the heat exchange coil 4 through the liquid inlet 38. The intelligent control device 35 detects the temperature and pressure of the incoming liquid through the connected first temperature transmitter 8 and first pressure transmitter 10. The associated gas or natural gas enters the burner 1 through the pipeline. The burner 1 is ignited, and the natural gas or associated gas burns and releases heat in the fire tube 3, heating the water inside the combustion furnace body 2. At the same time, the intelligent control device 35 controls the operation of the circulating water pump 24, sending the water in the combustion furnace body 2 to the electric heating water tank 33. The fourth pressure transmitter 27 and the fourth temperature transmitter 29 feedback the detected pressure and temperature to the intelligent control device 35. The resistance heater 34 is powered on, and the incoming liquid is heated and its temperature rises. When the water temperature rises to the set temperature, it is transported to the combustion furnace body 2 through the electric heating hot water pipeline 40. The third temperature transmitter 20 and the third pressure transmitter 18 feedback the detected water temperature and pressure of the heated water to the intelligent control device 35. The water with increased temperature exchanges heat with the incoming liquid through the heat exchange coil 4. The incoming liquid after heat exchange finally flows out through the liquid outlet 39. The second temperature transmitter 13 and the second pressure transmitter 15 feedback the temperature and pressure detected by the second thermometer 12 and the second pressure gauge 14 to the intelligent control device 35, and so on.

[0044] Embodiment 3:

[0045] In this embodiment, an oilfield gas-electric dual-purpose water jacket heating device is heated by gas. The intelligent control device 35 sends out signals, and the first water outlet valve 17 and the second water outlet valve 23 are automatically closed. The liquid inlet valve 11 and the liquid outlet valve 16 are opened. The liquid from the well site or station enters the heat exchange coil 4 through the liquid inlet 38. The first temperature transmitter 8 and the first pressure transmitter 10 detect the temperature and pressure of the incoming liquid. The hot water in the combustion furnace body 2 exchanges heat with the incoming liquid. The incoming liquid after heat exchange finally flows out through the liquid outlet 39. The second temperature transmitter 13 and the second pressure transmitter 15 feedback the detected temperature and pressure to the intelligent control device 35 to complete the heating of the incoming liquid.

[0046] Embodiment 4:

[0047] This embodiment is a water replenishment process of an oilfield gas-electric dual-use water jacket heating device. The liquid level window and the liquid level transmitter 32 feed back signals to the intelligent control device 35. The intelligent control device 35 controls the water replenishment valve 5 and the first water outlet valve 17 to open. The supplementary water enters the combustion furnace body 2 and the electric heating water tank 33 from the water replenishment valve 5. When the liquid level window and the liquid level transmitter 32 in the expansion water tank 31 detect that the set water level is reached, they feed back to the intelligent control device 35. The intelligent control device 35 controls the water replenishment valve 5 and the first water outlet valve 17 to close, completing the water replenishment.

[0048] Embodiment 5:

[0049] This embodiment is a sewage discharge process of an oilfield gas-electric dual-use water jacket heating device. The intelligent control device 35 controls the first water outlet valve 17, the second water outlet valve 23, and the third water outlet valve 26 to open, and then opens the sewage discharge valve 6. When the water in the combustion furnace body 2 and the electric heating water tank 33 is drained, the sewage discharge valve 6 is closed, the water replenishment valve 5 is opened to supplement an appropriate amount of water, and then the sewage discharge valve 6 is opened to drain the water in the combustion furnace body 2 and the electric heating water tank 33. The flushing is repeated until the sewage discharge is completed.

Claims

1. An oilfield gas-electric dual-use water jacket heating device, characterized in that: The invention comprises a combustion furnace body (2), wherein a fire tube (3) is arranged at the lower part of the combustion furnace body (2), wherein the length of the fire tube (3) is greater than the length of the combustion furnace body (2) and passes through the two side walls of the combustion furnace body (2), and a burner (1) is installed on one side of the fire tube (3); a heat exchange coil (4) is arranged at the upper part of the combustion furnace body (2), and a liquid inlet (38) and a liquid outlet (39) are arranged on the heat exchange coil (4); an electric heating water tank (33) is connected to the upper part of the combustion furnace body (2), and a resistance heater (34) is arranged at the lower part of the electric heating water tank (33); An electrically heated hot water pipeline (40) and a return water pipeline (41) are also connected between the combustion furnace body (2) and the electrically heated water tank (33); one end of the electrically heated hot water pipeline (40) is fixedly connected to the side wall of the combustion furnace body (2) through a flange and is located above the heat exchange coil (4); the other end of the electrically heated hot water pipeline (40) is fixedly connected to the side wall of the electrically heated water tank (33) through a flange and is located below the resistance heater (34); one end of the return water pipeline (41) is fixedly connected to the bottom of the combustion furnace body (2) through a flange, and the other end is fixedly connected to the top of the electrically heated water tank (33) through a flange.

2. The oilfield gas-electric dual-use water jacket heating device according to claim 1 is characterized in that: A water supply pipeline (36) and a sewage discharge pipeline (37) are provided below the combustion furnace body (2); the combustion furnace body (2) is connected to a water supply valve (5) via the water supply pipeline (36); and the combustion furnace body (2) is connected to a sewage discharge valve (6) via the sewage discharge pipeline (37).

3. The oilfield gas-electric dual-use water jacket heating device according to claim 2 is characterized in that: The liquid inlet (38) and the liquid outlet (39) of the heat exchange coil (4) extend outside the combustion furnace body (2) and extend out from a side of the combustion furnace body (2) where no burner (1) is arranged; the liquid inlet (38) pipeline is provided with a liquid inlet valve (11), a first pressure transmitter (10), a first pressure gauge (9), a first temperature transmitter (8) and a first thermometer (7) in sequence, and the first thermometer (7) is located on a side close to the combustion furnace body (2); the liquid outlet (39) pipeline is provided with a liquid outlet valve (16), a second pressure transmitter (15), a second pressure gauge (14), a second temperature transmitter (13) and a second thermometer (12) in sequence, and the second thermometer (12) is located on a side close to the combustion furnace body (2).

4. The oilfield gas-electric dual-use water jacket heating device according to claim 3 is characterized in that: The electrically heated hot water pipeline (40) is provided with a first water outlet valve (17), a third pressure transmitter (18), a third pressure gauge (19), a third temperature transmitter (20), and a third thermometer (21) in sequence. The third thermometer (21) is close to one side of the electrically heated water tank (33). The electrically heated hot water pipeline (40) is provided with a heat preservation device (22) on its outer surface.

5. The oilfield gas-electric dual-use water jacket heating device according to claim 4 is characterized in that: The return water pipeline (41) is provided with a second water outlet valve (23), a circulating water pump (24), a check valve (25), a third water outlet valve (26), a fourth pressure transmitter (27), a fourth pressure gauge (28), a fourth temperature transmitter (29), and a fourth thermometer (30) in sequence. The fourth thermometer (30) is located on the side of the connection port of the electric heating water tank (33). The return water pipeline (41) is coated with a heat preservation device (22) on its outer surface.

6. The oilfield gas-electric dual-use water jacket heating device according to claim 5, characterized in that: The first thermometer (7) is connected to the first temperature transmitter (8), and the first pressure gauge (9) is connected to the first pressure transmitter (10); the second thermometer (12) is connected to the second temperature transmitter (13), and the second pressure gauge (14) is connected to the second pressure transmitter (15); the third thermometer (21) is connected to the third temperature transmitter (20), and the third pressure gauge (19) is connected to the third pressure transmitter (18); the fourth thermometer (30) is connected to the fourth temperature transmitter (29), and the fourth pressure gauge (28) is connected to the fourth pressure transmitter (27).

7. The oilfield gas-electric dual-purpose water jacket heating device according to claim 6, characterized in that: The invention also comprises an intelligent control device (35), wherein the intelligent control device (35) is connected to the burner (1), the water supply valve (5), the first temperature transmitter (8), the first pressure transmitter (10), the second temperature transmitter (13), the second pressure transmitter (15), the first water outlet valve (17), the third pressure transmitter (18), the third temperature transmitter (20), the second water outlet valve (23), the circulating water pump (24), the third water outlet valve (26), the fourth pressure transmitter (27), the fourth temperature transmitter (29), the liquid level window and the liquid level transmitter (32), and the resistance heater (34).

8. The oilfield gas-electric dual-use water jacket heating device according to claim 1, characterized in that: The control end of the resistance heater (34) extends outside the wall of the electric heating water tank (33) and is fixedly connected to the wall of the electric heating water tank (33) via a flange.

9. The oilfield gas-electric dual-use water jacket heating device according to claim 1, characterized in that: A reinforcing rib plate is provided at the fixing flange of the electric heating water tank (33).

10. The oilfield gas-electric dual-use water jacket heating device according to claim 1, characterized in that: The invention also comprises an expansion water tank (31), wherein the expansion water tank (31) is arranged above the electric heating water tank (33), a liquid level window and a liquid level transmitter (32) are arranged on the cylinder wall of the expansion water tank (31), and an atmosphere communication hole (42) is also arranged on the top of the expansion water tank (31).

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