Oilfield overheat steam injection boiler blending device

Abstract

The application provides an oilfield superheated steam injection boiler mixing device, which comprises a pipe body, an atomizing mechanism and a cleaning mechanism, wherein the atomizing mechanism comprises an atomizing pipe, and the cleaning mechanism comprises a descaling ring and a connecting pipe; the atomizing pipe is installed on the side wall of the pipe body and communicates with the inner cavity of the pipe body; the descaling ring is arranged in the pipe body and is configured to extend along the axial direction of the pipe body, and at least part of the outer wall of the annular ring of the descaling ring is surrounded by the inner wall of the pipe body; the connecting pipe is fixed to one end of the descaling ring and is used to drive the descaling ring to move along the axial direction of the pipe body. Through the application, the technical problem that the inner wall of the pipe body of the oilfield superheated steam injection boiler mixing device is prone to dirt accumulation, which gradually accumulates and affects the normal operation of the equipment, is solved.

Description

Technical Field

[0001] This invention relates to the field of oilfield equipment technology, and in particular to a blending device for an oilfield superheated steam injection boiler. Background Technology

[0002] The radiant section of the superheated steam injection boiler in the oilfield produces wet saturated steam. After being separated by a steam-water separator, the wet saturated steam produces dry steam and highly saline saturated water at approximately 300°C. Directly discharging this highly saline saturated water would result in a significant loss of water and heat energy, and would cause serious pollution to the surrounding environment.

[0003] To address the above issues, a blending device for oilfield superheated steam injection boilers can be used. This device mixes fully atomized, high-salt saturated water with superheated steam to generate steam, which can then be used in oilfield production, achieving energy conservation, emission reduction, and environmental protection.

[0004] However, during operation, the inner wall of the pipe of the mixing device of the superheated steam injection boiler in the oilfield is prone to scale buildup. The scale gradually accumulates and can affect the normal operation of the equipment, leading to accidents. Summary of the Invention

[0005] The purpose of this invention is to provide a blending device for an oilfield superheated steam injection boiler, so as to alleviate the technical problem that the inner wall of the pipe of the blending device is prone to fouling, and the fouling gradually accumulates, affecting the normal operation of the equipment.

[0006] The above-mentioned objectives of the present invention can be achieved by the following technical solutions: This invention provides a mixing device for an oilfield superheated steam injection boiler, comprising: a pipe body, an atomizing mechanism, and a cleaning mechanism. The atomizing mechanism includes an atomizing tube, and the cleaning mechanism includes a descaling ring and a connecting pipe. The atomizing tube is installed on the side wall of the pipe body and communicates with the inner cavity of the pipe body. The descaling ring is disposed within the pipe body and is configured to extend axially along the pipe body, with at least a portion of the outer wall of the descaling ring being surrounded by the inner wall of the pipe body; the connecting pipe is fixed to one end of the descaling ring and is used to drive the descaling ring to move axially along the pipe body.

[0007] In a preferred embodiment, the outer diameter of the descaling ring is smaller than the inner diameter of the pipe body, and a mixing annular space is provided between the descaling ring and the pipe body.

[0008] In a preferred embodiment, the cleaning mechanism includes a scraper fixed to one end of the descaling ring, the scraper being configured to contact the inner wall of the tube.

[0009] In a preferred embodiment, scrapers are fixed to both ends of the descaling ring.

[0010] In a preferred embodiment, the atomizing mechanism includes a housing and a tube seat. The housing is sleeved over the atomizing tube, and an annular cavity communicating with the inner cavity of the tube body is provided between the housing and the atomizing tube. The outer end of the housing and the outer end of the atomizing tube are both fixed to the tube seat, and the inner end of the housing is installed on the side wall of the tube body.

[0011] In a preferred embodiment, the mixing device includes a plurality of atomizing mechanisms, which are distributed along the axial direction of the tube.

[0012] In a preferred embodiment, the tube body includes an inner tube and an outer tube; the mixing device includes a first mounting base and a second mounting base, the outer tube is sleeved outside the inner tube, and a tube body annulus is provided between the inner tube and the outer tube; the first end of the inner tube and the first end of the outer tube are both fixed to the first mounting base, and the second end of the inner tube and the second end of the outer tube are both fixed to the second mounting base; the second mounting base is provided with a seat through hole, and the atomizing mechanism can move axially along the tube body through the seat through hole.

[0013] In a preferred embodiment, the mixing device includes at least two sealing gaskets, which are respectively disposed at both ends of the annular space of the tube body, and the sealing gaskets are in a sealing fit with both the inner tube and the outer tube.

[0014] In a preferred embodiment, the sealing gasket is in sealing fit with the outer surface of the circumferential sidewall of the inner tube.

[0015] In a preferred embodiment, the descaling ring is configured as a cylinder.

[0016] The features and advantages of this invention are: Superheated steam enters from one end of the tube, while at the same time, highly saline saturated water is sprayed into the tube from the atomizing mechanism. The atomized highly saline saturated water mixes with the superheated steam to generate steam, which can be discharged through the other end of the tube.

[0017] During operation, the blending device of this oilfield superheated steam injection boiler allows high-salt saturated water and superheated steam to enter the space between the descaling ring and the pipe body. Mixing occurs within this space, generating steam. The resulting fouling accumulates on the surface of the descaling ring, reducing fouling formation on the inner wall of the pipe. During cleaning, workers pull the connecting pipe outwards, pulling the descaling ring out of the pipe body for cleaning. Therefore, this blending device reduces fouling buildup on the inner wall of the pipe, facilitates cleaning, effectively prevents fouling accumulation on the pipe body, and helps ensure the normal operation of the equipment. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the structure of the blending device for an oilfield superheated steam injection boiler provided by the present invention; Figure 2 for Figure 1 The diagram shows the structure of the descaling ring in the blending device of the oilfield superheated steam injection boiler. Figure 3 for Figure 1 A cross-sectional view.

[0020] Explanation of icon numbers: 11. First end; 12. Second end; 20. Pipe body; 21. Inner pipe; 211. Circumferential sidewall; 22. Outer pipe; 23. Pipe body annulus; 24. Steam outlet; 31. First mounting base; 32. Second mounting base; 321. Through hole; 33. Sealing gasket; 40. Cleaning mechanism; 401. Blending annulus; 41. Descaling ring; 411. Outer wall of the ring; 42. Scraper; 43. Connecting pipe; 44. Fixing pipe; 50. Atomizing mechanism; 51. Atomizing tube; 52. Outer shell; 53. Tube base; 54. Annular cavity. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] This invention provides a mixing device for an oilfield superheated steam injection boiler, such as... Figure 1As shown, the mixing device includes: a tube body 20, an atomizing mechanism 50, and a cleaning mechanism 40. The atomizing mechanism 50 includes an atomizing tube 51, and the cleaning mechanism 40 includes a descaling ring 41 and a connecting tube 43. The atomizing tube 51 is installed on the side wall of the tube body 20 and communicates with the inner cavity of the tube body 20. The descaling ring 41 is disposed inside the tube body 20 and is configured to extend along the axial direction of the tube body 20. At least a portion of the outer annular wall 411 of the descaling ring 41 is surrounded by the inner wall of the tube body 20. The connecting tube 43 is fixed to one end of the descaling ring 41 and is used to drive the descaling ring 41 to move along the axial direction of the tube body 20.

[0023] Superheated steam enters from one end of the tube body 20. At the same time, highly saline saturated water is sprayed into the tube body 20 from the atomizing mechanism 50. The atomized highly saline saturated water mixes with the superheated steam to generate steam, which can be discharged through the other end of the tube body 20.

[0024] During operation, the blending device of this oilfield superheated steam injection boiler allows high-salt saturated water and superheated steam to enter the space between the descaling ring 41 and the tube body 20, where they mix and generate steam. The resulting fouling accumulates on the surface of the descaling ring 41, reducing fouling formation on the inner wall of the tube body 20. For cleaning, workers can pull the connecting pipe 43 outwards to remove the descaling ring 41 from the tube body 20 for cleaning. Therefore, this blending device reduces fouling buildup on the inner wall of the tube body 20, facilitates cleaning, effectively prevents fouling accumulation on the tube body 20, and helps ensure the normal operation of the equipment.

[0025] The outer ring 411 of the descaling ring 41 fits against the inner wall of the pipe body 20, reducing the generation of dirt on the inner wall of the pipe body 20. Preferably, both the descaling ring 41 and the pipe body 20 are cylindrical, and the axis of the descaling ring 41 is collinear with the axis of the pipe body 20. The descaling ring 41 can be a solid cylinder or a hollow cylinder.

[0026] The outer diameter of the descaling ring 41 is smaller than the inner diameter of the pipe body 20, such as Figure 1 and Figure 3 As shown, a gap is provided between the outer annular wall 411 of the descaling ring 41 and the inner wall of the tube body 20, forming a mixing annular cavity 401 between the descaling ring 41 and the tube body 20. High-salt saturated water and superheated steam enter the mixing annular cavity 401, mix in the mixing annular cavity 401, and generate steam. The descaling ring 41 is preferably made of a high-temperature resistant material.

[0027] In one embodiment of the present invention, the cleaning mechanism 40 includes a scraper 42 fixed to one end of the descaling ring 41, the scraper 42 being configured to contact the inner wall of the pipe body 20. When cleaning the dirt on the inner wall of the pipe body 20, the operator disassembles the mixing device and pulls the connecting pipe 43 outward, thereby driving the scraper 42 to scrape off the dirt from the inner wall of the inner pipe 21, effectively cleaning the dirt generated on the inner wall of the inner pipe 21, facilitating the operator's cleaning operation. Preferably, as... Figure 1 and Figure 2 As shown, scrapers 42 are fixed to both ends of the descaling ring 41.

[0028] High-salt saturated water, under high pressure, is ejected through the atomizing tube 51 and enters the mixing annulus 401. The high-salt saturated water is atomized during ejection, ensuring thorough mixing with superheated steam. In one embodiment of the invention, the atomizing mechanism 50 includes a housing 52 and a tube seat 53. The housing 52 is fitted over the atomizing tube 51, and an annular cavity 54 communicating with the inner cavity of the tube body 20 is provided between the housing 52 and the atomizing tube 51. The inner end of the housing 52 is installed on the side wall of the tube body 20, and the outer ends of the housing 52 and the atomizing tube 51 are both fixed to the tube seat 53. By providing the housing 52, sealing performance is increased, preventing leakage from the atomizing tube 51. Figure 1 As shown, the outer diameter of the atomizing tube 51 is smaller than the inner diameter of the outer shell 52. An annular cavity 54 is formed between the tube seat 53, the outer shell 52 and the atomizing tube 51. The outer shell 52 penetrates the side wall of the tube body 20, and the annular cavity 54 communicates with the inner cavity of the tube body 20.

[0029] The tube seat 53 facilitates connection to external pipelines. The outer end of the outer shell 52 is fixedly connected to the tube seat 53, and the outer end of the atomizing tube 51 is fixedly connected to and communicates with the tube seat 53. The annular cavity 54 is separated from the tube seat 53. High-pressure, high-salt saturated water supplied by the external pipeline enters the atomizing tube 51 through the tube seat 53.

[0030] Furthermore, the mixing device includes multiple atomizing mechanisms 50, which are distributed along the axial direction of the tube body 20. Specifically, atomizing mechanisms 50 are fixedly connected to both ends of the tube body 20 to ensure that the atomized high-salt saturated water is evenly distributed within the tube body 20 and fully mixed with the superheated steam.

[0031] In one embodiment of the present invention, the pipe body 20 includes an inner pipe 21 and an outer pipe 22. The mixing device includes a first mounting base 31 and a second mounting base 32. The outer pipe 22 is sleeved outside the inner pipe 21, and a pipe body annular space 23 is provided between the inner pipe 21 and the outer pipe 22. The first end 11 of the inner pipe 21 and the first end 11 of the outer pipe 22 are both fixedly connected to the first mounting base 31, and the second end 12 of the inner pipe 21 and the second end 12 of the outer pipe 22 are both fixedly connected to the second mounting base 32. The second mounting base 32 is provided with a seat through hole 321, through which the cleaning mechanism 40 can move axially along the pipe body 20. Specifically, the descaling ring 41 and the scraper 42 are both placed inside the inner pipe 21; for example... Figure 1 As shown, the outer shell 52 penetrates the outer tube 22 and extends into the inner cavity of the outer tube 22, and the bottom of the outer shell 52 is connected to the inner tube 21.

[0032] The end of the connecting pipe 43 is connected to a fixed pipe 44. During operation, the end of the fixed pipe 44 extends into the seat through hole 321. When cleaning is required, pulling the fixed pipe 44 moves the connecting pipe 43 and the descaling ring 41 outwards. The second mounting base 32 is located on the pipe body 20. Figure 1 As shown on the right, superheated steam can enter the pipe body 20 from the right end. A steam outlet 24 is provided at the left end of the pipe body 20, through which the steam generated by the mixing device is discharged and enters the steam injection line. In some cases, superheated steam can enter the pipe body 20 through the fixed pipe 44 and the connecting pipe 43.

[0033] The inner tube 21 and the outer tube 22 are fixedly connected. The mixing device includes at least two sealing gaskets 33, which are respectively disposed at both ends of the annular space 23 of the tube body. The sealing gaskets 33 are sealed to both the inner tube 21 and the outer tube 22 to ensure the sealing performance of the annular space 23 of the tube body.

[0034] Furthermore, the sealing gasket 33 is in a sealing fit with the outer surface of the circumferential sidewall 211 of the inner tube 21. The sealing gasket 33 is annular, such as... Figure 1 As shown, a sealing gasket 33 is provided on the circumferential sidewall 211 of the first end 11 of the inner tube 21. The sealing gasket 33 mates with the inner wall of the outer tube 22 and with the first mounting seat 31. A sealing gasket 33 is also provided on the circumferential sidewall 211 of the second end 12 of the inner tube 21. The sealing gasket 33 mates with the inner wall of the outer tube 22 and with the second mounting seat 32, so as to ensure a sealed fit between the first mounting seat 31, the second mounting seat 32, the outer tube 22 and the inner tube 21.

[0035] The above descriptions are merely a few embodiments of the present invention. Those skilled in the art can make various modifications or variations to the embodiments of the present invention based on the content disclosed in the application documents without departing from the spirit and scope of the present invention.

Claims

1. A mixing device for an oilfield superheated steam injection boiler, characterized in that, include: The tube body, the atomizing mechanism, and the cleaning mechanism are provided. The atomizing mechanism includes an atomizing tube, and the cleaning mechanism includes a descaling ring and a connecting tube. The atomizing tube is installed on the side wall of the tube body and communicates with the inner cavity of the tube body. The descaling ring is disposed within the pipe body, the descaling ring is configured to extend axially along the pipe body, and at least a portion of the outer wall of the descaling ring is surrounded by the inner wall of the pipe body; the connecting pipe is fixedly connected to one end of the descaling ring, and the connecting pipe is used to drive the descaling ring to move axially along the pipe body. The descaling ring is constructed as a cylinder; the outer diameter of the descaling ring is smaller than the inner diameter of the pipe body, and a mixing annular space is provided between the descaling ring and the pipe body; when the oilfield superheated steam injection boiler mixing device is running, high-salt saturated water and superheated steam enter the space between the descaling ring and the pipe body, mix in the space, and generate steam. The cleaning mechanism includes a scraper fixed to one end of the descaling ring, the scraper being configured to contact the inner wall of the tube body; The atomizing mechanism includes a housing and a tube base. The housing is sleeved over the atomizing tube, and an annular cavity communicating with the inner cavity of the tube body is provided between the housing and the atomizing tube. The outer end of the outer shell and the outer end of the atomizing tube are both fixed to the tube seat, and the inner end of the outer shell is installed on the side wall of the tube body; Scrapers are fixed to both ends of the descaling ring; The tube body includes an inner tube and an outer tube; the mixing device includes a first mounting base and a second mounting base, the outer tube is sleeved outside the inner tube, and a tube body annulus is provided between the inner tube and the outer tube; the first end of the inner tube and the first end of the outer tube are both fixed to the first mounting base, and the second end of the inner tube and the second end of the outer tube are both fixed to the second mounting base; The second mounting base is provided with a through hole, through which the cleaning mechanism can move axially along the tube body.

2. The blending device for an oilfield superheated steam injection boiler according to claim 1, characterized in that, The mixing device includes a plurality of atomizing mechanisms, which are distributed along the axial direction of the tube.

3. The blending device for an oilfield superheated steam injection boiler according to claim 1, characterized in that, The mixing device includes at least two sealing gaskets, which are respectively disposed at both ends of the annular space of the tube body, and the sealing gaskets are in a sealing fit with both the inner tube and the outer tube.

4. The blending device for an oilfield superheated steam injection boiler according to claim 3, characterized in that, The sealing gasket is in a sealing fit with the outer surface of the circumferential side wall of the inner tube.

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