High-pressure jet descaling device for outer wall of fire tube of oil field heating furnace

Abstract

The utility model relates to the technical field of oilfield development, in particular to a high-pressure jet descaling device for the outer wall of a fire tube of an oilfield heating furnace. The high-pressure jet descaling device for the outer wall of the fire tube of the oil field heating furnace comprises a motor and a reversing valve, the motor is connected with the reversing valve through a spiral reverser, a reversing valve element is connected with the spiral reverser and inserted into a reversing valve body, the reversing valve element is sleeved with two reversing valve packing bodies, and two reversing valve outlets are formed in the upper end of the reversing valve body. A reversing valve inlet is formed in the center of the lower end, a proximity switch A and a proximity switch B are arranged on the opposite sides of a reversing valve outlet A and a reversing valve outlet B respectively, the reversing valve outlet A and the reversing valve outlet B are connected with a water pipe A and a water pipe B respectively, a manifold A and a manifold B are arranged at the upper end of the water pipe A and the upper end of the water pipe B respectively, and a plurality of water nozzles are arranged on the manifold A and the manifold B respectively. According to the device, precise fluid control over descaling water flow is achieved through the motor, the reversing valve and the proximity switch, descaling operation is efficiently carried out, and therefore the energy utilization efficiency of the heating furnace is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to oilfield development technical field especially, relates to a kind of oilfield heating furnace fire tube outer wall high-pressure jet descaling device. BACKGROUND

[0002] Direct fire tube heating furnace, referred to as fire tube furnace, is widely used heating equipment in oilfield, used to heat oilfield well produced mixed liquid, wherein fire tube is the main heating device in heating furnace, fuel is ignited and burned by burner inside fire tube, heat is conducted and convected by fire tube outer wall and mixed liquid.But this heating mode has the following shortcomings: while heating mixed liquid, mechanical impurities in mixed liquid will cover on the surface of fire tube outer wall, especially in the range of 120 degrees of fire tube top.Calcium, magnesium inorganic salt and other impurities in mixed liquid are precipitated under the action of high temperature, gathered on the surface of fire tube outer wall to form impurity accumulation, seriously affect the heat transfer of fire tube to mixed liquid, if mechanical impurities cannot be removed in time, hard scale layer is formed under the action of long-term high temperature, resulting in that fire tube heat cannot be effectively transferred, fire tube always bears high temperature, leading to fire tube wall bulge, deformation and damage.In order to avoid high-temperature burnout of fire tube, production unit usually adopts the method of reducing the combustion temperature of heating furnace, which can prevent the burnout of heating furnace fire tube under high temperature, but the medium heating temperature does not reach the production requirement or the medium temperature does not reach the production requirement, which affects the normal production operation of oilfield and reduces the efficiency of heating furnace.In production, it is found that the most serious scaling burnout occurs in the range of 1000mm from fire tube refractory brick outlet, and the thickness of scale can reach 3mm.

[0003] The existing heating furnace fire tube anti-scaling device has the problems of affecting the efficiency of heating furnace and limited jetting distance, which cannot clean the dirt. SUMMARY

[0004] (I) Technical problem to be solved

[0005] The utility model provides a kind of oilfield heating furnace fire tube outer wall high-pressure jet descaling device to overcome the problem that the mechanical impurities and scale accumulation on the upper surface of heating furnace fire tube are not easy to clean in prior art.

[0006] (II) Technical scheme

[0007] To achieve the above object, the utility model provides a kind of oilfield heating furnace fire tube outer wall high-pressure jet descaling device, comprising: motor and reversing valve;

[0008] The right end of the motor is provided with a spiral reverser, and the output shaft of the motor is inserted into the spiral reverser;

[0009] The right end of the spiral commutator is provided with a reversing valve, the reversing valve comprises a reversing valve core and a reversing valve body, the reversing valve core is connected with the spiral commutator, the reversing valve core is inserted into the reversing valve body, the right end of the reversing valve body is provided with a reversing valve cover, and the left end of the reversing valve body is provided with a reversing valve core cover;

[0010] Two reversing valve isolation bodies are sleeved on the reversing valve core.

[0011] The upper end of the reversing valve body is respectively provided with a reversing valve outlet A and a reversing valve outlet B, the center of the lower end of the reversing valve body is provided with a reversing valve inlet, and the opposite sides of the reversing valve outlet A and the reversing valve outlet B are respectively provided with a proximity switch A and a proximity switch B.

[0012] The furnace body of the heating furnace comprises a cylinder, a fire tube and a plurality of smoke pipes are arranged in the cylinder, one end of the smoke pipe is connected with the fire tube and the other end of the smoke pipe extends out of the cylinder.

[0013] The outer wall of the fire tube is symmetrically provided with a collecting pipe A and a collecting pipe B, the collecting pipe A and the collecting pipe B are semicircularly arranged on the outer wall of the fire tube, and a plurality of water nozzles are arranged on the collecting pipe A and the collecting pipe B.

[0014] The lower end of the collecting pipe A is provided with a water pipe A, the lower end of the collecting pipe B is provided with a water pipe B, the lower end of the water pipe A is connected with the reversing valve outlet A, and the lower end of the water pipe B is connected with the reversing valve outlet B.

[0015] Preferably, the plurality of water nozzles are arranged at equal distances, the water nozzles are stainless steel water nozzles, and wear-resistant ceramic rings are arranged in the water nozzles.

[0016] Preferably, the collecting pipe A and the collecting pipe B are hollow cylindrical structures, and the water nozzles penetrate the collecting pipe A and the collecting pipe B.

[0017] Preferably, the collecting pipe A, the collecting pipe B, the water pipe A and the water pipe B are made of manganese steel.

[0018] Preferably, the reversing valve core and the reversing valve body are rotationally connected, and the reversing valve core can reciprocate in the reversing valve body under the driving of the output shaft of the motor.

[0019] Preferably, the reversing valve cover and the reversing valve body are threadedly connected, the reversing valve core cover is a hollow cylindrical structure, the left end of the reversing valve core cover is provided with a stepped outer edge, the reversing valve core cover is embedded in the left end of the reversing valve body, and the reversing valve core penetrates the center of the reversing valve core cover and is inserted into the reversing valve body.

[0020] Preferably, a plurality of reversing valve core sealing rings are arranged between the reversing valve core and the reversing valve core cover, and the reversing valve core sealing rings are sleeved on the outer wall of the left side of the reversing valve core.

[0021] Preferably, a reversing valve body sealing ring is arranged between the reversing valve cover, the reversing valve core cover and the reversing valve body, and the reversing valve body sealing ring is sleeved on the outer wall of the reversing valve cover and the reversing valve core cover.

[0022] Preferably, the lower ends of the proximity switch A and the proximity switch B are respectively connected with proximity switch instrument wires.

[0023] Preferably, the center of the reversing valve cover is provided with a limiting key, and the limiting key limits the reversing valve core.

[0024] (Three) beneficial effects

[0025] The utility model provides a kind of oilfield heating furnace fire tube outer wall high pressure jet descaling device, can be realized by being added two symmetrical manifold A and manifold B in hot furnace fire tube outer wall, and install several water nozzle on manifold, and the area of manifold covering fire tube outer wall surface is smaller, will not affect fire tube to mixed liquid heat transfer;The manifold A and manifold B are semicircularly installed in fire tube outer wall, so that the water nozzle on manifold is also semicircularly evenly distributed, and the manifold A and manifold B are symmetrically arranged so that the water nozzle can be opposite jet, and the surface of fire tube outer wall is entirely covered and sprayed;The combination of the motor and the spiral commutator makes the operation of the reversing valve more automated, reducing the need for manual intervention;The setting of the proximity switch A and the proximity switch B enables precise fluid control, ensuring that the water flow can efficiently pass through the water pipe A and the water pipe B into the manifold A and the manifold B for descaling operation, thereby achieving the purpose of reducing energy waste and improving the energy utilization efficiency of the heating furnace through efficient descaling method. BRIEF DESCRIPTION OF DRAWINGS

[0026] Fig. 1 A structure schematic view of the oilfield heating furnace fire tube outer wall high pressure jet descaling device is shown.

[0027] Fig. 2 A reversing valve structure schematic view of the oilfield heating furnace fire tube outer wall high pressure jet descaling device is shown.

[0028] 1: water nozzle; 2: manifold A; 3: manifold B; 4: water pipe A; 5: water pipe B; 6: reversing valve outlet A; 7: reversing valve outlet B; 8: reversing valve cover; 9: reversing valve core cover; 10: limiting key; 11: reversing valve inlet; 12: proximity switch A; 13: proximity switch B; 14: reversing valve core; 15: reversing valve body; 16: spiral commutator; 17: motor; 18: fire tube; 19: smoke pipe; 20: cylinder body; 21: proximity switch instrument wire; 22: reversing valve body sealing ring; 23: reversing valve core sealing ring; 24: reversing valve isolation body. DETAILED DESCRIPTION

[0029] The utility model will be specifically explained as follows in combination with the drawings and examples.

[0030] In the description of the utility model, it is necessary to understand that, "up", "down", "left", "right", "inside", "outside", "top", "bottom" and so on indicate the orientation or position relationship based on the orientation or position relationship shown in the drawing, the target is only for facilitating the description of the utility model and simplifying the description, and is not indicative or suggestive of the indicated components necessarily having a specific orientation, being constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model.

[0031] As shown in Figs. 1-2 The utility model provides a kind of oilfield heating furnace fire tube outer wall high pressure jetting scale removal device, it includes: motor 17 and reversing valve;

[0032] The right end of the motor 17 is provided with a spiral commutator 16, and the output shaft of the motor 17 is inserted into the spiral commutator 16. The right end of the spiral commutator 16 is provided with a reversing valve. The motor 17 makes the operation of the reversing valve more automated, reducing the need for manual intervention, thereby improving work efficiency.

[0033] The reversing valve includes a reversing valve core 14 and a reversing valve body 15. The left end of the reversing valve core 14 is connected to the spiral commutator 16. The right end of the reversing valve core 14 is inserted into the reversing valve body 15. The right end of the reversing valve body 15 is provided with a reversing valve cover 8. The left end of the reversing valve body 15 is provided with a reversing valve core cover 9. This structure design ensures that the reversing valve core 14 can make reciprocating motion in the reversing valve body 15 under the drive of the output shaft of the motor 17, thereby realizing accurate control of the fluid.

[0034] It should be noted that the reversing valve core 14 and the reversing valve body 15 are rotationally connected, which means that the reversing valve core 14 can rotate under the drive of the motor 17 to realize different fluid passage switching. The reversing valve cover 8 is threadedly connected to the reversing valve body 15. This connection mode not only ensures the firmness of the connection, but also facilitates disassembly and maintenance. The reversing valve core cover 9 is a hollow cylindrical structure. The left end of the reversing valve core cover 9 is provided with a step along the outer edge. This step plays a limiting role for the reversing valve core cover 9. The reversing valve core cover 9 is embedded in the left end of the reversing valve body 15. The reversing valve core 14 is inserted into the reversing valve body 15 through the center of the reversing valve core cover 9.

[0035] To ensure the sealing performance of the reversing valve, a plurality of reversing valve core sealing rings 23 are provided between the reversing valve core 14 and the reversing valve core cover 9. These sealing rings are fitted on the outer wall of the left side of the reversing valve core 14. A plurality of reversing valve body sealing rings 22 are respectively provided between the reversing valve cover 8 and the reversing valve core cover 9 and the reversing valve body 15. The reversing valve body sealing rings 22 are fitted on the outer wall of the reversing valve cover 8 and the reversing valve core cover 9. The center of the reversing valve cover 8 is provided with a limiting key 10. This limiting key plays a limiting role for the reversing valve core 14 to prevent it from rotating or moving excessively during movement.

[0036] The reversing valve body 15 is a hollow cylindrical structure, the upper end of the reversing valve body 15 is respectively provided with reversing valve outlet A6 and reversing valve outlet B7, the reversing valve outlet A6 and the reversing valve outlet B7 are symmetrically arranged, the lower end of the reversing valve body 15 is provided with a reversing valve inlet 11, which enables the fluid to enter from the lower end of the reversing valve inlet 11 and then be distributed through the two outlets of the upper end of the reversing valve outlet A6 and the reversing valve outlet B7, the opposite sides of the reversing valve outlet A6 and the reversing valve outlet B7 are respectively provided with proximity switch A12 and proximity switch B13, the lower ends of the proximity switch A12 and the proximity switch B13 are respectively connected with proximity switch instrument line 21, the proximity switch A12 and the proximity switch B13 are connected to the control system through the instrument line 21, so as to monitor and adjust the flow of fluid in real time.

[0037] The reversing valve core 14 is sleeved with two reversing valve packers 24, the reversing valve packer 24 is a circular ring structure, the outer diameter size of the reversing valve packer 24 matches the inner wall size of the reversing valve body 15, so that the reversing valve packer 24 can be closely fitted on the inner wall of the reversing valve body 15, thereby effectively dividing the central space of the reversing valve body 15, which realizes the switching of the liquid outlet of the reversing valve outlet A6 and the reversing valve outlet B7.

[0038] The heating furnace body comprises a cylinder 20, the cylinder 20 is provided with a fire tube 18 and a plurality of smoke pipes 19, one end of the smoke pipe 19 is connected with the fire tube 18 and the other end extends out of the cylinder 20, the outer wall of the fire tube 18 is symmetrically provided with a collecting pipe A2 and a collecting pipe B3, the collecting pipe A2 and the collecting pipe B3 are semicircularly installed on the outer wall of the fire tube 18, forming a structure surrounding the fire tube, a plurality of water nozzles 1 are respectively arranged on the collecting pipe A2 and the collecting pipe B3, and the plurality of water nozzles 1 are arranged in a straight line at equal intervals, which ensures the uniform distribution of water flow.

[0039] The water nozzle 1 is a stainless steel water nozzle, the water nozzle 1 is provided with a wear-resistant ceramic ring to increase its durability and corrosion resistance, the water nozzle 1 penetrates the collecting pipe A2 and the collecting pipe B3 respectively, in actual application, the diameter of the water nozzle 1 is 1.5mm-2.0mm, and the included angle between the axis of the water nozzle 1 and the axis of the fire tube 18 is 5 degrees-8 degrees, which not only ensures the efficient injection of water flow, but also avoids the direct impact of water flow on the outer wall of the fire tube, thereby reducing the wear of the fire tube 18.

[0040] The water nozzles 1 on the collecting pipe A2 and the collecting pipe B3 are oppositely arranged, the single water nozzle 1 has a spraying distance of 50cm, the water nozzle 1 sprays in a fan shape with an angle of 20 degrees-25 degrees, which ensures that the water flow can fully cover the outer wall of the fire tube, thereby realizing efficient descaling effect.

[0041] The water pipe A4 and the water pipe B5 are connected with the reversing valve through the water collecting pipe A2 and the water collecting pipe B3 respectively, specifically, the lower end of the water collecting pipe A2 is provided with the water pipe A4, the lower end of the water collecting pipe B3 is provided with the water pipe B5, the lower end of the water pipe A4 is connected to the reversing valve outlet A6, and the lower end of the water pipe B5 is connected to the reversing valve outlet B7, which ensures that the high-pressure water flow can enter the water collecting pipe A2 and the water collecting pipe B3 from the reversing valve outlets A6 and B7 respectively and then be sprayed out through the water nozzle 1.

[0042] In order to ensure the pressure resistance and durability of the system, the water collecting pipe A2, the water collecting pipe B3, the water pipe A4 and the water pipe B5 are all made of manganese steel, which has high strength and good toughness and can withstand the impact of high-pressure water flow, and also has good corrosion resistance.

[0043] The water pipe A4 connects the water collecting pipe A2 and the reversing valve outlet A6, and the water pipe B5 connects the water collecting pipe B3 and the reversing valve outlet B7. High-pressure water enters through the reversing valve inlet 11, and then, under the drive of the motor 17, the spiral reversing device 16 controls the reversing valve core 14 to drive the reversing valve sealing body 24 to move, so that the high-pressure water flow can flow alternately between the water collecting pipe A2 and the water collecting pipe B3 as needed, thereby realizing the alternate pulse spraying of the water nozzle 1.

[0044] The actual working scene of an oil field heating furnace fire tube outer wall high-pressure jet cleaning device will be described in detail below.

[0045] In the actual working process, the operator needs to first install the water nozzle 1, the water collecting pipe 2A, the water collecting pipe 3B, the water pipe 4A and the water pipe 5B in the device in the heating furnace body, and connect the water pipe 4A and the water pipe 5B with the reversing valve.

[0046] When working, connect the high-pressure pump truck to the reversing valve inlet 11 and start the motor 17. The motor 17 drives the spiral reversing device 16 to rotate and drives the reversing valve core 14 and the reversing valve sealing body 24 to move linearly along the axis to the right. When the left reversing valve sealing body 24 reaches the proximity switch A12, the motor 17 stops running.

[0047] The reversing valve sealing body 24 blocks the reversing valve outlet A6, and simultaneously opens the reversing valve outlet B7, high-pressure water enters the water pipe B5 through the reversing valve outlet B7 and enters the manifold B3, the water nozzle 1 arranged on the manifold B3 starts to perform high-pressure jet flushing on the outer wall of the fire tube, 5 seconds later, the motor 17 automatically reverses operation, the spiral reversing device 16 drives the reversing valve core 14 and the reversing valve sealing body 24 to move linearly along the axis to the left, when the right end of the reversing valve sealing body 24 reaches the proximity switch B13, the motor 17 stops running, the reversing valve sealing body 24 blocks the reversing valve outlet B7, and simultaneously opens the reversing valve outlet A6, high-pressure water enters the water pipe A4 through the reversing valve and enters the manifold A2, the water nozzle 1 on the manifold A2 starts to perform high-pressure jet flushing on the outer wall of the fire tube, 5 seconds later, the motor automatically reverses operation, the above pulse jet is repeated, and after the flushing is completed, the power supply is turned off and the connection between the high-pressure pump truck and the reversing valve inlet 11 is removed.

[0048] It can be understood that the above-mentioned various embodiments of the utility model can be combined with each other to form combined embodiments without violating the principle logic, and the utility model will not be described again due to the limited length.

[0049] Those skilled in the art can understand that in the above method of the specific embodiment, the writing order of each step does not mean a strict execution order and does not constitute any limitation on the implementation process, and the specific execution order of each step should be determined according to its function and possible internal logic.

[0050] The oil field heating furnace fire tube outer wall high-pressure jet descaling device provided by the utility model installs two symmetrical manifolds A2 and B3 on the outer wall of the fire tube of the heating furnace, and a plurality of water nozzles 1 are installed on the manifolds, the manifolds cover a smaller area of the outer wall surface of the fire tube 18 and do not affect the heat transfer of the mixed liquid by the fire tube 18, the manifolds A2 and B3 are semicircular and are installed on the outer wall of the fire tube 18, so that the water nozzles 1 on the manifolds are also semicircular and are uniformly distributed, the manifolds A2 and B3 are symmetrically arranged, so that the water nozzles 1 can jet oppositely and cover and jet the outer wall surface of the fire tube 18, the combination of the motor 17 and the spiral reversing device 16 makes the operation of the reversing valve more automatic and reduces the need for manual intervention, the reversing valve can realize accurate fluid control through the arrangement of the proximity switch A12 and the proximity switch B13, so that the water flow can efficiently enter the manifolds A2 and B3 through the water pipes A4 and B5 and perform descaling operation, so that the purpose of reducing energy waste and improving the energy utilization efficiency of the heating furnace through the efficient descaling mode is achieved.

[0051] The above has described various embodiments of the present application, the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or improvements in the technology in the market, or to enable other ordinary skilled in the art to understand the embodiments disclosed herein.

Claims

1. An oil field heating furnace fire tube outer wall high pressure jet cleaning device, characterized in that, The utility model relates to a heating furnace body and a heating furnace, and relates to the technical field of heating furnace. The motor (17) is provided with a spiral commutator (16) at the right end, and the output shaft of the motor (17) is inserted into the spiral commutator (16). The spiral commutator (16) is provided with a commutating valve at the right end, and the commutating valve comprises a commutating valve core (14) and a commutating valve body (15). The commutating valve core (14) is connected with the spiral commutator (16), is inserted into the commutating valve body (15), and the right end of the commutating valve body (15) is provided with a commutating valve cover (8). The left end of the commutating valve body (15) is provided with a commutating valve core cover (9). The commutating valve core (14) is provided with two commutating valve isolation bodies (24). The upper end of the commutating valve body (15) is respectively provided with a commutating valve outlet A (6) and a commutating valve outlet B (7). The lower end of the commutating valve body (15) is provided with a commutating valve inlet (11) at the center. The opposite sides of the commutating valve outlet A (6) and the commutating valve outlet B (7) are respectively provided with a proximity switch A (12) and a proximity switch B (13).

2. The oil field heating furnace fire tube outer wall high pressure jet cleaning device according to claim 1, characterized in that, The heating furnace body comprises a cylinder (20), a fire tube (18) and a plurality of smoke pipes (19) arranged in the cylinder (20).

3. The oilfield furnace fire tube outer wall high pressure jet cleaning device according to claim 2, characterized in that, The outer wall of the fire tube (18) is symmetrically provided with a collecting pipe A (2) and a collecting pipe B (3).

4. The oilfield furnace fire tube outer wall high pressure jet cleaning device according to claim 1, characterized in that, The collecting pipe A (2) and the collecting pipe B (3) are semicircularly arranged on the outer wall of the fire tube (18).

5. The oilfield furnace fire tube outer wall high pressure jet cleaning device according to claim 1, characterized in that, The lower end of the collecting pipe A (2) is provided with a water pipe A (4), and the lower end of the collecting pipe B (3) is provided with a water pipe B (5).

6. The oilfield furnace fire tube outer wall high pressure jet cleaning device according to claim 5, characterized in that, The lower end of the water pipe A (4) is connected with the commutating valve outlet A (6), and the lower end of the water pipe B (5) is connected with the commutating valve outlet B (7).

7. The oilfield furnace fire tube outer wall high pressure jet cleaning device according to claim 6, characterized in that, The plurality of water nozzles (1) are arranged at equal intervals. The water nozzles (1) are stainless steel water nozzles, and the water nozzles (1) are provided with wear-resistant ceramic rings. The collecting pipe A (2) and the collecting pipe B (3) are hollow cylindrical structures. The water nozzles (1) penetrate the collecting pipe A (2) and the collecting pipe B (3). The collecting pipe A (2), the collecting pipe B (3), the water pipe A (4) and the water pipe B (5) are all made of manganese steel. The commutating valve core (14) and the commutating valve body (15) are rotationally connected. The commutating valve core (14) can reciprocate in the commutating valve body (15) under the driving of the output shaft of the motor (17). The commutating valve cover (8) and the commutating valve body (15) are threadedly connected. The commutating valve core cover (9) is a hollow cylindrical structure. The commutating valve core (14) penetrates the center of the commutating valve core cover (9) and is inserted into the commutating valve body (15). The commutating valve core (14) and the commutating valve core cover (9) are provided with a plurality of commutating valve core sealing rings (23). The commutating valve core sealing rings (23) are arranged on the left outer wall of the commutating valve core (14).

8. The oilfield furnace fire tube outer wall high pressure jet cleaning device according to claim 1, characterized in that, The reversing valve body sealing ring (22) is sleeved on the outer wall of the reversing valve cover (8) and the reversing valve core cover (9).

9. The oilfield furnace fire tube outer wall high pressure jet cleaning device according to claim 1, characterized in that, The lower ends of the proximity switch A (12) and the proximity switch B (13) are respectively connected with proximity switch instrument lines (21).

10. The oilfield furnace fire tube outer wall high pressure jet cleaning device according to claim 1, characterized in that, The center of the reversing valve cover (8) is provided with a limiting key (10), and the limiting key (10) limits the reversing valve core (14).

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