Oil field gas steam injection boiler

Abstract

The utility model discloses an oil field gas steam-injection boiler, which comprises an oil field gas steam-injection boiler body, the oil field gas steam-injection boiler body comprises a radiation section and a convection condensation section fixedly communicated with the right side of the top of the radiation section, and the top of the convection condensation section is fixedly communicated with a tail gas heat recovery filtering mechanism. Through the arrangement of a series of structures, heat in exhausted flue gas can be recycled, water is heated, heat waste is reduced, meanwhile, the flue gas can be cooled, the situation that high-temperature flue gas is directly exhausted and scalds people is reduced, water can be automatically discharged and added when the water temperature reaches a preset value, and the water supply efficiency is improved. In addition, the discharged flue gas can be filtered and purified, so that the environmental pollution caused by direct discharge of the flue gas is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of oilfield gas steam injection boilers, in particular to an oilfield gas steam injection boiler. Background Art

[0002] Existing oilfield steam injection boilers are usually horizontal direct current water tube boilers, which are mainly composed of a radiation section, a transition section connected to the tail of the radiation section, and a convection section arranged above the transition section. The inner wall of the radiation section is lined with aluminum silicate refractory fiber and is provided with reciprocating coils to form a spacious furnace in the middle; the convection section is a rectangular structure composed of light tubes and finned tubes; the gas-fired steam injection boilers currently in use are large in size, which is mainly reflected in the axial length of the radiation section and the height of the flue gas outlet from the ground. The dimensions in both directions are large, which is not conducive to the flexible steam injection requirements of heavy oil blocks. The existing gas-fired boilers are transformed from oil-fired boilers, and the heat exchange surface is mainly based on the characteristics of oil combustion. After changing to natural gas fuel, the heat exchange characteristics and flue gas characteristics have changed, which cannot meet the current requirements of high efficiency and energy saving. For this reason, application number: 202110987125.8 discloses an oil The field gas steam injection boiler comprises a radiation section, a convection section and a condensation section arranged along the flow direction of the flue gas, the convection section is provided with a convection section light tube and a convection section fin tube, a high dry section is added between the convection section light tube and the convection section fin tube, the high dry section is provided with a high dry section light tube and a high dry section fin tube, the flue gas passes through the radiation section, the convection section light tube, the high dry section light tube, the high dry section fin tube, the convection section fin tube, and the condensation section heat exchange light tube in sequence, and the flue gas condenser can be used to further reduce the flue gas temperature, absorb the latent heat of vaporization of water vapor in the flue gas, form condensed water, and improve the boiler efficiency to more than 100%. Through the optimization of the heating surface and the design of the flue structure, the heat exchange ratio of the radiation section and the convection section is optimized to 5:5, and the heat exchange is more in line with the heat release characteristics of the natural gas flame; through three different forms of pressure reduction during the flue gas flow process, the tail flue gas resistance is reduced;

[0003] The oilfield gas steam injection boiler disclosed in the above patent reduces the tail flue gas resistance by reducing the pressure three times in different forms during the flow of flue gas, and can meet the current high-efficiency energy-saving requirements. However, it still has some shortcomings when in use: the flue gas temperature discharged into the tail chimney during its use is 56 degrees, and the flue gas is directly discharged through the chimney, the temperature is relatively high, there is a risk of scalding personnel, and the heat cannot be recovered and reused, resulting in heat waste; in addition, the flue gas contains pollutants, and direct discharge will pollute the external environment and cannot meet the use requirements. Based on the above situation, we have proposed an oilfield gas steam injection boiler. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes an oilfield gas steam injection boiler.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An oilfield gas-fired steam injection boiler comprises an oilfield gas-fired steam injection boiler body, wherein the oilfield gas-fired steam injection boiler body comprises a radiation section and a convection condensation section connected and fixed to the right side of the top of the radiation section, and a tail gas heat recovery and filtering mechanism is connected and fixed to the top of the convection condensation section;

[0007] The exhaust gas heat recovery and filtering mechanism includes a connecting pipe connected and fixed to the top of the convection condensation section, a water tank is fixedly sleeved on the connecting pipe, a heat conducting coil is fixedly connected between the inner walls of both sides of the water tank, the heat conducting coil is used for flue gas circulation, the left end of the heat conducting coil is set as a blocking structure, the top of the connecting pipe is connected and fixed to the inside of the heat conducting coil, a temperature detection drainage and water storage component is installed on the water tank, the temperature detection drainage and water storage component is used to detect the water temperature in the water tank, and can drain and add water to the water inside the water tank, a filter box is fixedly connected to the right side of the water tank, and the right end of the heat conducting coil extends to A first conical cover is fixed and connected in the filter box, a filter assembly located on the right side of the first conical cover is installed in the filter box, the filter assembly is used to filter impurities in the flue gas, the top of the filter assembly extends to the top of the filter box, the right side of the filter assembly is movably in contact with an air guide assembly, a partition is fixedly installed in the filter box, the partition is fixedly sleeved on the air guide assembly, purified water filled in the filter box is provided on the right side of the partition, the air guide assembly is used to discharge the filtered flue gas into the purified water, an exhaust pipe is fixed and connected to the top of the right side of the filter box, the exhaust pipe is used to discharge the purified gas.

[0008] Preferably, the temperature detection drainage and water storage component includes a water adding solenoid valve connected and fixed on the left side of the top of the water tank, the water adding solenoid valve is used to add water to the water tank, and a drainage solenoid valve is connected and fixed on the right side of the bottom of the water tank, the drainage solenoid valve is used to discharge the water inside the water tank, a temperature sensor is fixedly connected to the top of the water tank, the detection end of the temperature sensor extends into the water tank, the temperature sensor is used to detect the water temperature inside the water tank, a controller is fixedly connected to the top of the water tank, and a water level sensor is embedded and fixed on the top inner wall of the water tank, the water level sensor is used to detect the amount of water inside the water tank, the detection principle is the existing technology and will not be elaborated here, the water level sensor, temperature sensor, water adding solenoid valve and drainage solenoid valve are all electrically connected to the controller.

[0009] Preferably, the filter assembly includes an L-shaped filter screen movably mounted in the filter box, the bottom of the L-shaped filter screen is magnetically fixed to the bottom inner wall of the filter box, the top of the L-shaped filter screen is fixedly connected to a connecting block, the filter box is movably mounted on the connecting block, the top of the connecting block is flush with the top of the filter box, and the top of the connecting block is fixedly connected to a pull ring, and the connecting block can be pulled upward by the pull ring to remove the L-shaped filter screen.

[0010] Preferably, the air guide assembly includes a second conical cover, the left side of the second conical cover is in movably contact with the right side of the L-shaped filter, the right side of the second conical cover is connected and fixed with an L-shaped air guide pipe, the bottom end of the L-shaped air guide pipe extends into the purified water, the partition is fixedly mounted on the L-shaped air guide pipe, and the L-shaped air guide pipe is used to discharge the flue gas after filtration and cooling into the purified water.

[0011] Preferably, the front and rear sides of the L-shaped filter are respectively in movably contact with the front inner wall and the rear inner wall of the filter box, the bottom of the L-shaped filter is fixedly connected with a first magnet, a groove is provided on the bottom inner wall of the filter box, and a second magnet is fixedly connected to the bottom inner wall of the groove, the first magnet is movably mounted in the groove and adsorbed with the top of the second magnet, and the L-shaped filter can be quickly fixed by the first magnet and the second magnet.

[0012] Preferably, a through hole is opened on the top inner wall of the filter box, the inner wall of the through hole is in movable contact with the outer side of the connecting block, the distance between the left inner wall and the right inner wall of the through hole is larger than the left and right widths of the L-shaped filter net, the distance between the front inner wall and the rear inner wall of the through hole is the same as the distance between the front and rear sides of the L-shaped filter net, and the through hole is used for allowing the L-shaped filter net to pass through.

[0013] Preferably, a mounting hole is provided on the inner wall of the bottom of the water tank, and the inner wall of the mounting hole is fixedly connected to the outer side of the connecting pipe.

[0014] Compared with the existing technology, the beneficial effects of the utility model are:

[0015] 1. Through the cooperation of water tank, heat conducting coil and connecting pipe, the heat in the flue gas can be recycled to heat water, reducing the waste of heat. At the same time, the flue gas can be cooled to reduce the situation where high-temperature flue gas is directly discharged to scald people;

[0016] 2. Through the cooperation of the filter component, the air guide component and the purified water, the impurities and pollutants in the discharged flue gas can be filtered and purified, reducing the pollution to the environment caused by the direct discharge of flue gas;

[0017] 3. Through the setting of temperature detection drainage and water storage components, it can realize the purpose of automatic water discharge and automatic water addition when the water temperature reaches the requirement, thus improving the degree of intelligence;

[0018] The utility model can recycle the heat in the exhausted smoke and use it to heat water through a series of structural arrangements, thereby reducing heat waste. At the same time, it can cool the smoke and reduce the situation where high-temperature smoke is directly discharged to scald people. When the water temperature reaches a preset value, water can be automatically released and added. In addition, the exhausted smoke can be filtered and purified to reduce the pollution to the environment caused by the direct exhaust of smoke. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of the oilfield gas steam injection boiler proposed by the utility model;

[0020] Figure 2 for Figure 1 Schematic diagram of the enlarged cross-sectional structure of part A.

[0021] In the figure: 100, radiation section; 101, convection condensation section; 1, connecting pipe; 2, water tank; 3, filter box; 4, exhaust pipe; 5, heat transfer coil; 6, temperature sensor; 7, controller; 8, water level sensor; 9, water addition solenoid valve; 10, drainage solenoid valve; 11, first conical cover; 12, L-shaped filter; 13, second conical cover; 14, L-shaped air duct; 15, partition; 16, connecting block. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Reference Figure 1-2 , an oilfield gas steam injection boiler, including an oilfield gas steam injection boiler body, the oilfield gas steam injection boiler body including a radiation section 100 and a convection condensation section 101 connected and fixed to the right side of the top of the radiation section 100, wherein the specific working principle of the oilfield gas steam injection boiler body has been mentioned in the patent document with application number 202110987125.8, and will not be elaborated here, and the top of the convection condensation section 101 is connected and fixed with an exhaust gas heat recovery and filtering mechanism;

[0024] The exhaust gas heat recovery and filtering mechanism includes a connecting pipe 1 connected and fixed to the top of the convection condensation section 101, and a water tank 2 is fixedly sleeved on the connecting pipe 1, wherein a mounting hole is opened on the bottom inner wall of the water tank 2, and the inner wall of the mounting hole is fixedly connected to the outer side of the connecting pipe 1, and a heat-conducting coil 5 is fixedly connected between the inner walls on both sides of the water tank 2, and the heat-conducting coil 5 is used for flue gas circulation and transferring the heat of the flue gas to the water tank 2, and the left end of the heat-conducting coil 5 is set as a blocking structure, and the top of the connecting pipe 1 is connected and fixed to the inside of the heat-conducting coil 5, and a temperature detection drainage and water storage component is installed on the water tank 2, wherein the temperature detection drainage and water storage component includes a water-adding solenoid valve 9 connected and fixed to the left side of the top of the water tank 2, and the water-adding solenoid valve 9 is connected to the external water supply pipe, and the water-adding solenoid valve 9 is used When adding water to the water tank 2, a drain solenoid valve 10 is connected and fixed on the right side of the bottom of the water tank 2. The drain solenoid valve 10 is connected to the external hot water recovery pipe. The drain solenoid valve 10 is used to discharge the water inside the water tank 2. A temperature sensor 6 is fixedly connected to the top of the water tank 2. The detection end of the temperature sensor 6 extends into the water tank 2. The temperature sensor 6 is used to detect the water temperature inside the water tank 2. A controller 7 is fixedly connected to the top of the water tank 2. A water level sensor 8 is embedded and fixed on the top inner wall of the water tank 2. The water level sensor 8 is used to detect the amount of water inside the water tank 2. The detection principle is the existing technology and will not be elaborated here. The water level sensor 8, the temperature sensor 6, the water adding solenoid valve 9 and the drain solenoid valve 10 are all electrically connected to the controller 7;

[0025] The right side of the water tank 2 is fixedly connected with the filter box 3, the right end of the heat conducting coil 5 extends into the filter box 3 and is connected and fixed with the first conical cover 11, wherein a first through hole is opened on the left inner wall of the filter box 3, and a second through hole is opened on the right inner wall of the water tank 2, the inner wall of the first through hole and the inner wall of the second through hole are both fixedly connected to the outer side of the heat conducting coil 5, the first through hole and the second through hole are used for the heat conducting coil 5 to pass through, and a filter assembly located on the right side of the first conical cover 11 is installed in the filter box 3, and the top of the filter assembly extends to the top of the filter box 3;

[0026] The filter assembly includes an L-shaped filter screen 12 movably sleeved in the filter box 3, the bottom of the L-shaped filter screen 12 is magnetically fixed to the bottom inner wall of the filter box 3, wherein the front side and the rear side of the L-shaped filter screen 12 are movably contacted with the front inner wall and the rear inner wall of the filter box 3 respectively, the bottom of the L-shaped filter screen 12 is fixedly connected to a first magnet, a groove is provided on the bottom inner wall of the filter box 3, a second magnet is fixedly connected to the bottom inner wall of the groove, the first magnet is movably sleeved in the groove and is adsorbed with the top of the second magnet, the L-shaped filter screen 12 can be quickly fixed by the first magnet and the second magnet, and the top of the L-shaped filter screen 12 is fixedly connected to a connecting block 16, the filter box 3 is movably sleeved on the connecting block 16, the top of the connecting block 16 is flush with the top of the filter box 3, wherein a through hole is opened on the inner wall of the top of the filter box 3, the inner wall of the through hole is movably contacted with the outer side of the connecting block 16, the distance between the left inner wall and the right inner wall of the through hole is larger than the left and right widths of the L-shaped filter screen 12, the distance between the front inner wall and the rear inner wall of the through hole is the same as the distance between the front side and the rear side of the L-shaped filter screen 12, the through hole is used for the L-shaped filter screen 12 to pass through, the top of the connecting block 16 is fixedly connected with a pull ring, and the connecting block 16 can be pulled upward by the pull ring, so that the L-shaped filter screen 12 can be removed;

[0027] The right side of the L-shaped filter 12 is in active contact with an air guide assembly, a partition 15 is fixedly installed in the filter box 3, the partition 15 is fixedly sleeved on the air guide assembly, and the right side of the partition 15 is provided with purified water filled in the filter box 3, wherein the air guide assembly includes a second conical cover 13, the left side of the second conical cover 13 is in active contact with the right side of the L-shaped filter 12, the distance between the front and rear sides of the second conical cover 13 is the same as the width between the front and rear sides of the L-shaped filter 12, the right side of the second conical cover 13 is connected and fixed with an L-shaped air guide pipe 14, the bottom end of the L-shaped air guide pipe 14 extends into the purified water, the partition 15 is fixedly sleeved on the L-shaped air guide pipe 14, and the L-shaped air guide pipe 14 is used to discharge the filtered and cooled flue gas into the purified water;

[0028] An exhaust pipe 4 is fixedly connected to the top of the right side of the filter box 3, and the exhaust pipe 4 is used for exhausting the purified gas. Through a series of structural arrangements, the utility model can recycle the heat in the exhausted flue gas to heat the water, thereby reducing the waste of heat. At the same time, the flue gas can be cooled to reduce the situation where the high-temperature flue gas is directly discharged to scald people. When the water temperature reaches a preset value, water can be automatically added and drained. In addition, the exhausted flue gas can be filtered and purified to reduce the pollution to the environment caused by the direct discharge of the flue gas.

[0029] Working principle: When in use, cold water is added to the water tank 2 in advance through the water adding solenoid valve 9. When the smoke inside the convection condensation section 101 is discharged, it enters the heat conducting coil 5 through the connecting pipe 1. The heat conducting coil 5 transfers the heat in the smoke to the water inside the water tank 2, so that the water temperature inside the water tank 2 increases and the temperature of the smoke inside the heat conducting coil 5 decreases, thereby achieving the effect of heating the water inside the water tank 2. The smoke after cooling in the heat conducting coil 5 is discharged to the filter box 3 through the first cone cover 11. The smoke inside the filter box 3 passes through the L-shaped filter The net 12 is discharged into the purified water through the second cone cover 13 and the L-shaped air guide pipe 14 in sequence, the L-shaped filter net 12 blocks the impurities in the flue gas from flowing through, the purified water adsorbs and purifies the tiny pollutants in the flue gas, and the gas after adsorption and purification floats up and is discharged to the outside through the exhaust pipe 4, thereby achieving the effect of filtering and purifying the discharged flue gas, which can effectively reduce the pollution caused by the direct discharge of flue gas to the environment, and can recycle the heat in the flue gas to heat the water, thereby reducing the situation where the high-temperature flue gas is directly discharged to scald people;

[0030] The temperature value of drainage and the water level value of water addition are set in advance by the controller 7, the water addition solenoid valve 9 is connected to the external water supply end, and the drainage solenoid valve 10 is connected to the external hot water collection pipe. As the water inside the water tank 2 is heated, the water temperature gradually rises. The temperature sensor 6 detects the water temperature inside the water tank 2 and transmits the detected water temperature value to the controller 7. When it is detected that the water temperature reaches the preset value, the controller 7 controls the drainage solenoid valve 10 to open, so that the hot water inside the water tank 2 is discharged to the external hot water collection pipe through the drainage solenoid valve 10. At the same time, the water level sensor 8 detects the water temperature inside the water tank 2. 2 detects the amount of water inside and transmits the detected water amount value to the controller 7. When it is detected that there is no water, the controller 7 controls the drain solenoid valve 10 to close and controls the water adding solenoid valve 9 to open, so that the water in the water supply end is discharged into the water tank 2 through the water adding solenoid valve 9, so that the inside of the water tank 2 is filled with cold water again. When the water level sensor 8 detects that the water amount reaches the preset value, the controller 7 controls the water adding solenoid valve 9 to close, thereby achieving the purpose of automatically draining and automatically adding water when the water temperature reaches the requirement, improving the degree of intelligence, and reducing the waste of heat by recycling the heat in the flue gas.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An oilfield gas-fired steam injection boiler, comprising an oilfield gas-fired steam injection boiler body, wherein the oilfield gas-fired steam injection boiler body comprises a radiation section (100) and a convection condensation section (101) connected and fixed to the right side of the top of the radiation section (100), characterized in that: The top of the convection condensation section (101) is connected and fixed with an exhaust gas heat recovery and filtering mechanism; The exhaust gas heat recovery and filtering mechanism comprises a connecting pipe (1) connected and fixed to the top of the convection condensation section (101); a water tank (2) is fixedly sleeved on the connecting pipe (1); a heat conducting coil (5) is fixedly connected between the inner walls of both sides of the water tank (2); the left end of the heat conducting coil (5) is provided with a blocking structure; the top end of the connecting pipe (1) is connected and fixed to the inside of the heat conducting coil (5); a temperature detection drainage and water storage component is installed on the water tank (2); a filter box (3) is fixedly connected to the right side of the water tank (2); the right end of the heat conducting coil (5) extends A first conical cover (11) is connected and fixed to the filter box (3), a filter assembly located on the right side of the first conical cover (11) is installed in the filter box (3), the top of the filter assembly extends to the top of the filter box (3), the right side of the filter assembly is movably in contact with the air guide assembly, a partition (15) is fixedly installed in the filter box (3), the partition (15) is fixedly sleeved on the air guide assembly, purified water filled in the filter box (3) is provided on the right side of the partition (15), and an exhaust pipe (4) is connected and fixed to the top of the right side of the filter box (3).

2. The oilfield gas steam injection boiler according to claim 1, characterized in that: The temperature detection drainage and water storage component comprises a water filling solenoid valve (9) connected and fixed on the left side of the top of the water tank (2); a drainage solenoid valve (10) connected and fixed on the right side of the bottom of the water tank (2); a temperature sensor (6) fixedly connected to the top of the water tank (2); a detection end of the temperature sensor (6) extending into the water tank (2); a controller (7) fixedly connected to the top of the water tank (2); a water level sensor (8) embedded and fixed on the inner wall of the top of the water tank (2); and the water level sensor (8), the temperature sensor (6), the water filling solenoid valve (9) and the drainage solenoid valve (10) are all electrically connected to the controller (7).

3. The oilfield gas steam injection boiler according to claim 2, characterized in that: The filter assembly comprises an L-shaped filter screen (12) movably mounted in a filter box (3); the bottom of the L-shaped filter screen (12) is fixed to the bottom inner wall of the filter box (3) by magnetic attraction; the top of the L-shaped filter screen (12) is fixedly connected to a connecting block (16); the filter box (3) is movably mounted on the connecting block (16); the top of the connecting block (16) is flush with the top of the filter box (3); and the top of the connecting block (16) is fixedly connected to a pull ring.

4. The oilfield gas steam injection boiler according to claim 3, characterized in that: The air guide assembly comprises a second conical cover (13), the left side of the second conical cover (13) is in active contact with the right side of the L-shaped filter screen (12), the right side of the second conical cover (13) is connected and fixedly connected with an L-shaped air guide pipe (14), the bottom end of the L-shaped air guide pipe (14) extends into the purified water, and the partition plate (15) is fixedly sleeved on the L-shaped air guide pipe (14).

5. The oilfield gas steam injection boiler according to claim 3, characterized in that: The front side and the rear side of the L-shaped filter (12) are in active contact with the front inner wall and the rear inner wall of the filter box (3), respectively; the bottom of the L-shaped filter (12) is fixedly connected to a first magnet; a groove is provided on the bottom inner wall of the filter box (3); a second magnet is fixedly connected to the bottom inner wall of the groove; the first magnet is movably sleeved in the groove and adsorbed to the top of the second magnet.

6. The oilfield gas steam injection boiler according to claim 3, characterized in that: A through hole is provided on the top inner wall of the filter box (3), the inner wall of the through hole is in movable contact with the outer side of the connection block (16), the distance between the left inner wall and the right inner wall of the through hole is larger than the left and right widths of the L-shaped filter screen (12), and the distance between the front inner wall and the rear inner wall of the through hole is the same as the distance between the front side and the rear side of the L-shaped filter screen (12).

7. The oilfield gas steam injection boiler according to claim 1, characterized in that: A mounting hole is provided on the inner wall of the bottom of the water tank (2), and the inner wall of the mounting hole is fixedly connected to the outer side of the connecting pipe (1).

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