Spraying device for anti-coking process of waste heat steam boiler

Abstract

The invention discloses a spraying device for an anti-coking process of a waste heat steam boiler, the spraying device is used for spraying an anti-coking coating / slurry in the boiler manufacturing process, a nozzle of the spraying device comprises an outer barrel, an outlet barrel, an inner barrel, a lining barrel and a spring, and the lining barrel is mounted between the inner barrel and the outlet barrel; a spring is connected between the left end of the lining cylinder and the left end of the outlet cylinder, and a mixing cavity is formed in the outlet cylinder and located at the right end of the lining cylinder; the first flow path is from the left end surface of the inner cylinder to the peripheral surface of the inner cylinder to the peripheral surface of the outlet cylinder to the mixing cavity, and the second flow path is from the middle part of the left end of the inner cylinder to the center of the lining cylinder to the mixing cavity; the axial position of the inner cylinder relative to the outlet cylinder is adjustable, and the axial position of the outlet cylinder relative to the outer cylinder is adjustable. Slurry uniformity can be improved, the fluidity of slurry can be adjusted, and the spraying effect and spraying efficiency of the slurry can be improved; and the assembly and the adjustment are simple and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of anti-coking processes for waste heat steam boilers, and particularly relates to a spraying device for an anti-coking process of a waste heat steam boiler. Background Art

[0002] For existing spraying devices used in the anti-coking process of waste heat steam boilers, the spraying device is used to spray anti-coking coatings / slurries / materials during the boiler manufacturing process. It includes a nozzle, and the nozzle includes an outer cylinder, an outlet cylinder, an inner cylinder, a lining cylinder, and a spring. The right end of the outer cylinder is detachably connected to the right end of the outlet cylinder, and a mixing chamber is provided inside the outlet cylinder and at the right end of the lining cylinder. However, the existing spraying device still has problems such as poor slurry uniformity, poor fluidity, inconvenient assembly / regulation, and the need to further improve the spraying effect and spraying efficiency. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a spraying device for an anti-coking process of a waste heat steam boiler. Through the improved design of the nozzle structure, it can improve the slurry uniformity, can adjust the fluidity of the slurry, improve its spraying effect and spraying efficiency; and is simple to assemble and adjust.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A spraying device for an anti-coking process of a waste heat steam boiler, the spraying device is used to spray anti-coking coatings / slurries / materials during the boiler manufacturing process. It includes a nozzle, and the nozzle includes an outer cylinder (1), an outlet cylinder (2), an inner cylinder (3), a lining cylinder (4), and a spring (5). The right end of the outer cylinder is detachably connected to the right end of the outlet cylinder, the left end of the outlet cylinder is detachably connected to the right end of the inner cylinder, a lining cylinder is installed between the inner cylinder and the outlet cylinder, a spring is connected between the left end of the lining cylinder and the left end of the outlet cylinder, and a mixing chamber is provided inside the outlet cylinder and at the right end of the lining cylinder; characterized in that: the spraying slurry converges in the mixing chamber after passing through the first flow path and the second flow path and is sprayed out through the outlet spraying hole (23) of the outlet cylinder. The first flow path is: the left end face of the inner cylinder → the outer peripheral surface of the inner cylinder → the outer peripheral surface of the outlet cylinder → the mixing chamber, and the second flow path is: the middle of the left end of the inner cylinder → the center of the lining cylinder → the mixing chamber; the axial position of the inner cylinder relative to the outlet cylinder is adjustable, and the axial position of the outlet cylinder relative to the outer cylinder is adjustable.

[0005] Furthermore, the axial position of the inner cylinder relative to the outlet cylinder can be adjusted by threads, and the axial position of the outlet cylinder relative to the outer cylinder can be adjusted by threads.

[0006] Furthermore, the outer cylinder includes a left side section (13), an outer cylinder section (11), and a right side section 12 that are connected in sequence, and the left side section has a first threaded section (14).

[0007] Furthermore, the outlet cylinder body includes an outlet cylinder section (21) and an outlet end portion (22). An outlet injection hole (23) is provided at the center of the outlet end portion. A mixing cavity is provided inside the outlet cylinder section. The outer peripheral surface of the outlet end portion has a second threaded section (24), and the second threaded section is threadedly connected to the internal thread of the right side section. A plurality of circumferentially distributed communication holes (25) are provided at the right end of the outlet cylinder section. The communication holes respectively communicate the outer peripheral surface of the outlet cylinder section and the mixing cavity, and the communication holes are substantially tangent to the outer peripheral surface of the mixing cavity. A first stepped portion (28) is provided at the left end of the outlet cylinder section, a shoulder (26) is provided on the outer peripheral surface of the left end, and the first stepped portion has a third threaded section (27).

[0008] Furthermore, the inner cylinder body includes an inner cylinder section (31) and a left end wall (32). A plurality of circumferentially distributed inlet holes (33) are provided in the middle of the left end wall. The right end of the inner cylinder section has a fourth threaded section (34), and the fourth threaded section is an internal thread. The fourth threaded section is threadedly connected to the third threaded section. The right end of the inner cylinder section abuts against the shoulder. A plurality of circumferentially distributed guide vanes (35) are provided on the outer peripheral surface of the inner cylinder section. The guide vanes are spiral guide vanes, and the right ends of the guide vanes protrude beyond the shoulder. The guide vanes are used to guide the spraying slurry towards the communication holes (25).

[0009] Furthermore, the lining cylinder body includes a lining cylinder section (41) and a second stepped portion (42). The left end of the lining cylinder section is provided with a second stepped portion, and the second stepped portion abuts against the left end wall. The right end of the lining cylinder section is arranged inside the outlet cylinder section. A first tapered section (43) is provided on the inner peripheral surface of the lining cylinder section. The spring is sleeved on the outer periphery of the lining cylinder section. The left end of the spring abuts against the second stepped portion (42), and the right end abuts against the first stepped portion (28).

[0010] Furthermore, the deflector includes a second tapered section (61) and a threaded connection column (62). The right end of the deflector is provided with a second tapered section, and the left end is provided with a threaded connection column. The taper of the second tapered section matches that of the first tapered section. The threaded connection column is screwed into the central internal threaded hole of the left end wall through an external thread, and a guiding arc surface is provided at the left end of the threaded connection column.

[0011] Furthermore, the slurry pressure can overcome the pre-tightening force of the spring (5) so that the lining cylinder body has a certain axial displacement relative to the outlet cylinder section. One or more balance holes / regulation holes are provided on the inner cylinder section (31), and the balance holes / regulation holes respectively communicate the cavity where the spring is located and the outer peripheral surface of the inner cylinder section.

[0012] Furthermore, the installation and adjustment process of the spraying device includes the following steps: S1: Screw the threaded connection column of the deflector (6) into the left end wall of the inner cylinder body (3), and adjust the axial position of the deflector relative to the inner cylinder body through the thread; S2: Place the liner cylinder body (4) inside the inner cylinder body, sleeved with a spring (5) around the outer periphery of the liner cylinder section, then thread-connect the outlet cylinder section of the outlet cylinder body (2) to the inner cylinder section, with the first step portion positioned between the liner cylinder section and the inner cylinder section, and adjust the axial position of the outlet cylinder body relative to the inner cylinder body through the third thread section; S3: Install the assembly assembled in step S2 into the outer cylinder body (1) from the right end of the outer cylinder body, and adjust the axial position of the assembly relative to the outer cylinder body through the second thread section; S4: Thread-connect the nozzle to the corresponding pipe opening of the spraying device through the first thread section.

[0013] A spraying device for the anti-coking process of waste heat steam boilers according to the present invention can improve the slurry uniformity and adjust the fluidity of the slurry through the improved design of the nozzle structure, thereby improving its spraying effect and spraying efficiency; and it is simple to assemble and adjust. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the spraying device for the anti-coking process of waste heat steam boilers according to the present invention; Figure 2 is a schematic structural diagram of the spraying device for the anti-coking process of waste heat steam boilers according to the present invention; Figure 3 is a schematic cross-sectional structural diagram of the communication hole of the spraying device according to the present invention.

[0015] In the figure: outer cylinder body 1, outlet cylinder body 2, inner cylinder body 3, liner cylinder body 4, spring 5, deflector 6, outer cylinder section 11, right side section 12, left side section 13, thread section 14, outlet cylinder section 21, outlet end 22, outlet spraying hole 23, thread section 24, communication hole 25, shoulder 26, thread section 27, first step portion 28, inner cylinder section 31, left end wall 32, inlet hole 33, thread section 34, guide vane 35, liner cylinder section 41, second step portion 42, first tapered section 43, second tapered section 61, threaded connection post 62. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] To make the technical solutions of the present invention and their advantages clearer, the technical solutions of the present invention will be further clearly and completely described in detail below with reference to the drawings. It can be understood that the specific embodiments described herein are only partial embodiments of the present invention, which are only used to explain the present invention rather than limit the present invention. It should be noted that for the convenience of description, only the parts / structures related to the present invention are shown in the drawings, and other related parts can refer to the general design. Without conflict, the embodiments in the present invention and the technical features in the embodiments can be combined with each other to obtain new embodiments.

[0017] 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 scope of protection of the present invention. In addition, unless otherwise defined, the technical terms or scientific terms used in the description of the present invention shall have the ordinary meanings understood by those of ordinary skill in the art to which the present invention pertains.

[0018] The present invention will be further described in detail below with reference to the accompanying drawings.

[0019] As Figures 1-3 shown, a spraying device for the anti-coking process of a waste heat steam boiler, the spraying device is used to spray an anti-coking coating / slurry / material during the boiler manufacturing process, and it includes a nozzle. The nozzle includes an outer cylinder body 1, an outlet cylinder body 2, an inner cylinder body 3, a lining cylinder body 4, and a spring 5. The right end of the outer cylinder body 1 is detachably connected to the right end of the outlet cylinder body 2, and the left end of the outlet cylinder body 2 is detachably connected to the right end of the inner cylinder body 3. A lining cylinder body 4 is installed between the inner cylinder body 3 and the outlet cylinder body 2, and a spring 5 is connected between the left end of the lining cylinder body 4 and the left end of the outlet cylinder body 2. A mixing chamber is provided in the outlet cylinder body 2 and at the right end of the lining cylinder body 4. It is characterized in that: the spraying slurry converges in the mixing chamber after passing through the first flow path and the second flow path and is ejected through the ejection hole 23 of the outlet cylinder body 2. The first flow path is: the left end face of the inner cylinder body 3 → the outer peripheral surface of the inner cylinder body 3 → the outer peripheral surface of the outlet cylinder body 2 → the mixing chamber, and the second flow path is: the middle of the left end of the inner cylinder body 3 → the center of the lining cylinder body 4 → the mixing chamber; the axial position of the inner cylinder body 3 relative to the outlet cylinder body 2 is adjustable, and the axial position of the outlet cylinder body 2 relative to the outer cylinder body 1 is adjustable.

[0020] In one embodiment, the axial (axis direction) position of the inner cylinder body 3 relative to the outlet cylinder body 2 can be adjusted by a thread, and the axial position of the outlet cylinder body 2 relative to the outer cylinder body 1 can be adjusted by a thread.

[0021] Furthermore, the outer cylinder body 1 includes a left side section 13 (upstream end), an outer cylinder section 11, and a right side section 12 (downstream end) that are connected in sequence. The left side section 13 has a first thread section 14, and the first thread section 14 is an external thread or an internal thread. The first thread section 14 is used for threaded connection with the corresponding pipe orifice of the spraying device, and the right side section 12 has an internal thread.

[0022] The outlet cylinder body 2 includes an outlet cylinder section 21 and an outlet end 22. An outlet injection hole 23 is formed at the center of the outlet end 22. A mixing cavity is formed inside the outlet cylinder section 21. The outer peripheral surface of the outlet end 22 has a second threaded section 24, and the second threaded section 24 is threadedly connected to the internal thread of the right side section 12. A plurality of circumferentially distributed communication holes 25 are formed at the right end of the outlet cylinder section 21. The communication holes 25 respectively communicate the outer peripheral surface of the outlet cylinder section 21 and the mixing cavity, and the communication holes 25 are substantially tangent to the outer peripheral surface of the mixing cavity. A first step portion 28 is provided at the left end of the outlet cylinder section 21, and a shoulder 26 is provided on the outer peripheral surface of the left end. The first step portion 28 has a third threaded section 27.

[0023] The inner cylinder body 3 includes an inner cylinder section 31 and a left end wall 32. A plurality of circumferentially distributed inlet holes 33 are formed in the middle of the left end wall 32. The right end of the inner cylinder section 31 has a fourth threaded section 34 which is an internal thread, and the fourth threaded section 34 is threadedly connected to the third threaded section 27. The right end of the inner cylinder section 31 abuts against the shoulder 26. A plurality of circumferentially distributed guide vanes 35 are provided on the outer peripheral surface of the inner cylinder section 31. The guide vanes 35 are spiral guide vanes, and the right ends of the guide vanes 35 protrude beyond the shoulder 26. The guide vanes 35 are used to guide the spraying slurry towards the communication holes 25 to improve its fluidity.

[0024] The lining cylinder body 4 includes a lining cylinder section 41 and a second step portion 42. The left end of the lining cylinder section 41 is provided with a second step portion 42, and the second step portion 42 abuts against the left end wall 32. The right end of the lining cylinder section 41 is arranged inside the outlet cylinder section 21. A first tapered section 43 is provided on the inner peripheral surface of the lining cylinder section 41. A spring 5 is sleeved on the outer periphery of the lining cylinder section 41. The left end of the spring 5 abuts against the second step portion 42, and the right end abuts against the first step portion 28.

[0025] The deflector 6 includes a second tapered section 61 and a threaded connection column 62. The right end of the deflector 6 is provided with a second tapered section 61, and the left end is provided with a threaded connection column 62. The taper of the second tapered section 61 matches that of the first tapered section 43. The threaded connection column 62 is screwed into the central internal threaded hole of the left end wall 32 through an external thread, and a deflector arc surface is provided at the left end of the threaded connection column 62.

[0026] In an embodiment, the slurry pressure can overcome the pre-tightening force of the spring 5 so that the lining cylinder body 4 has a certain axial displacement relative to the outlet cylinder section 21. One or more balance holes / regulation holes are formed on the inner cylinder section 31. The regulation holes respectively communicate the cavity where the spring 5 is located and the outer peripheral surface of the inner cylinder section 31 to balance / regulate the pressure distribution.

[0027] A spraying device for a coking prevention process of a waste heat steam boiler according to the present invention can improve the slurry uniformity, can regulate the fluidity of the slurry, and improve its spraying effect and spraying efficiency through the improved design of the nozzle structure.

[0028] The installation or adjustment process of the spraying device includes the following steps: S1: Screw the threaded connection column 62 of the deflector 6 into the left end wall 32 of the inner cylinder 3, and adjust the axial position of the deflector 6 relative to the inner cylinder 3 by threading. S2: Place the lining cylinder 4 inside the inner cylinder 3, sleeved with a spring 5 around the outer circumference of the lining cylinder section 41, then thread the outlet cylinder section 21 of the outlet cylinder 2 to the inner cylinder section 31. The first step portion 28 is located between the lining cylinder section 41 and the inner cylinder section 31, and adjust the axial position of the outlet cylinder 2 relative to the inner cylinder 3 by the third threaded section 27. S3: Install the assembly assembled in step S2 into the outer cylinder 1 from the right end of the outer cylinder 1, and adjust the axial position of the assembly relative to the outer cylinder 1 by the second threaded section 24. S4: Thread the nozzle to the corresponding pipe opening of the spraying device through the first threaded section 14.

[0029] The spraying device of the present invention is composed of several parts / components such as an outer cylinder 1, an outlet cylinder 2, an inner cylinder 3, a lining cylinder 4, a spring 5, and a deflector 6, and its assembly and adjustment are simple.

[0030] A spraying device for the anti-coking process of a waste heat steam boiler according to the present invention can improve the slurry uniformity, adjust the fluidity of the slurry, and improve its spraying effect and spraying efficiency through the improved design of the nozzle structure; and its assembly and adjustment are simple.

[0031] The above embodiments are descriptions of the present invention, not limitations of the present invention. It can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A spraying device for a waste heat steam boiler anti-coking process, comprising a nozzle, the nozzle comprising an outer cylinder (1), an outlet cylinder (2), an inner cylinder (3), a liner (4), and a spring (5), the right end of the outer cylinder is detachably connected to the right end of the outlet cylinder, the left end of the outlet cylinder is detachably connected to the right end of the inner cylinder, a liner is installed between the inner cylinder and the outlet cylinder, a spring is connected between the left end of the liner and the left end of the outlet cylinder, and a mixing chamber is provided in the outlet cylinder and at the right end of the liner; the characteristics are: The spray slurry passes through the first flow path and the second flow path, and then merges in the mixing chamber and is sprayed out through the outlet spray hole (23) of the outlet cylinder. The first flow path is: the left end surface of the inner cylinder → the outer peripheral surface of the inner cylinder → the outer peripheral surface of the outlet cylinder → the mixing chamber, and the second flow path is: the middle of the left end of the inner cylinder → the center of the liner → the mixing chamber; the axial position of the inner cylinder relative to the outlet cylinder is adjustable, and the axial position of the outlet cylinder relative to the outer cylinder is adjustable.

2. A spraying device for the anti-coking process of a waste heat steam boiler according to claim 1, characterized in that: The axial position of the inner cylinder relative to the outlet cylinder can be adjusted by means of a thread, and the axial position of the outlet cylinder relative to the outer cylinder can be adjusted by means of a thread.

3. A spraying device for the anti-coking process of a waste heat steam boiler according to claim 1, characterized in that: The outer cylinder body comprises a left section (13), an outer cylinder section (11), and a right section 12 which are connected in sequence, and the left section has a first threaded section (14).

4. A spraying device for the anti-coking process of a waste heat steam boiler as claimed in claim 3, characterized in that: The outlet barrel comprises an outlet barrel section (21) and an outlet end section (22), wherein an outlet injection hole (23) is provided at the center of the outlet end section, a mixing chamber is provided in the outlet barrel section, a second thread section (24) is provided on the outer peripheral surface of the outlet end section, the second thread section is threadedly connected to the inner thread of the right section, a plurality of circumferentially distributed connecting holes (25) are provided on the right end of the outlet barrel section, the connecting holes respectively connect the outer peripheral surface of the outlet barrel section and the mixing chamber, and the connecting holes are substantially tangent to the outer peripheral surface of the mixing chamber; a first step section (28) is provided at the left end of the outlet barrel section, a shoulder (26) is provided on the outer peripheral surface of the left end, and the first step section has a third thread section (27).

5. A spraying device for the anti-coking process of a waste heat steam boiler as claimed in claim 4, characterized in that: The inner cylinder body comprises an inner cylinder section (31) and a left end wall (32). A plurality of inlet holes (33) distributed along the circumferential direction are provided in the middle of the left end wall. A fourth thread section (34) is provided at the right end of the inner cylinder section. The fourth thread section is an internal thread. The fourth thread section is threadedly connected to the third thread section. The right end of the inner cylinder section abuts against the shoulder. A plurality of guide vanes (35) distributed along the circumferential direction are provided on the outer circumferential surface of the inner cylinder section. The guide vanes are spiral guide vanes. The right ends of the guide vanes protrude from the shoulder. The guide vanes are used to guide the spray slurry to the connecting hole (25).

6. A spraying device for the anti-coking process of a waste heat steam boiler as claimed in claim 5, characterized in that: The liner body comprises a liner section (41) and a second step portion (42). The left end of the liner section is provided with the second step portion, the second step portion abuts against the left end wall, the right end of the liner section is provided in the outlet liner section, the inner circumference of the liner section is provided with a first conical section (43), the spring is sleeved on the outer circumference of the liner section, the left end of the spring abuts against the second step portion (42), and the right end abuts against the first step portion (28).

7. A spraying device for the anti-coking process of a waste heat steam boiler according to claim 6, characterized in that: The guide body comprises a second tapered section (61) and a threaded connection column (62). The right end of the guide body is provided with the second tapered section, and the left end is provided with the threaded connection column. The taper of the second tapered section matches that of the first tapered section. The threaded connection column is screwed into the central internal threaded hole of the left end wall via an external thread. The left end of the threaded connection column is provided with a guide arc surface.

8. A spraying device for the anti-coking process of a waste heat steam boiler as claimed in claim 7, characterized in that: The slurry pressure can overcome the preload force of the spring (5) so that the liner body has a certain axial displacement relative to the outlet cylinder section. One or more balancing holes / adjustment holes are opened on the inner cylinder section (31), and the balancing holes / adjustment holes are respectively connected to the cavity where the spring is located and the outer peripheral surface of the inner cylinder section.

9. A spraying device for the anti-coking process of a waste heat steam boiler according to claim 7, characterized in that: The installation and adjustment process of the spraying device includes the following steps: S1: Screw the threaded connection column of the guide body (6) into the left end wall of the inner cylinder (3), and adjust the axial position of the guide body relative to the inner cylinder through the thread; S2: placing the liner body (4) in the inner cylinder body, sleeve a spring (5) on the outer periphery of the liner segment, and then threading the outlet cylinder segment of the outlet cylinder body (2) to the inner cylinder segment, with the first step being located between the liner segment and the inner cylinder segment, and adjusting the axial position of the outlet cylinder body relative to the inner cylinder body through the third thread segment; S3: installing the component assembled in step S2 into the outer cylinder (1) from the right end thereof, and adjusting the axial position of the component relative to the outer cylinder by means of the second threaded section; S4: Threading the nozzle to a corresponding pipe opening of the spraying device through the first thread section.

Images