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CN-115889011-B - Screw-type adjusting spray head and anti-corrosion water injection operation method for fractionating tower top

CN115889011BCN 115889011 BCN115889011 BCN 115889011BCN-115889011-B

Abstract

The invention discloses a screwing type adjusting spray head for water injection of a fractionating tower, which comprises a spray assembly. The jetting assembly includes a sleeve and a nozzle, an inner barrel inserted into the sleeve. The inner barrel comprises a discharge hole, an adjusting piece and a limiting piece, and the limiting piece can be meshed with the adjusting piece. The device adjusts the aperture of the discharge hole by rotating the inner cylinder, thereby realizing the control of corrosion of the tower top crystallization. The invention also discloses an anti-corrosion water injection operation method for the top of the fractionating tower.

Inventors

  • PAN LONG
  • HAN LEI
  • NIU LUNA
  • ZHANG YANLING
  • CHEN WENWU

Assignees

  • 中国石油化工股份有限公司
  • 中石化安全工程研究院有限公司

Dates

Publication Date
20260505
Application Date
20210930

Claims (7)

  1. 1. A fractionation overhead corrosion protection water injection operation method using a screw-type adjustment spray head (100), the screw-type adjustment spray head (100) comprising: -a spraying assembly (20), said spraying assembly (20) comprising a sleeve (21), and a nozzle (23) arranged at the bottom of said sleeve (21), An inner cylinder (10) for injecting a fluid, inserted into the sleeve (21), the inner cylinder (10) comprising a plurality of discharge holes (11) of different sizes arranged circumferentially and penetrating the wall of the inner cylinder (10), and an adjusting member (12) fixed to the inner cylinder (10), and A limiting piece (30) fixedly connected with the top of the sleeve (21), wherein the limiting piece (30) can be meshed with the adjusting piece (12) to prevent the adjusting piece (12) from rotating, Wherein the nozzle (23) is aligned with one of the discharge holes (11) by rotating the inner barrel (10) to allow fluid to be ejected from the nozzle (23), The inner barrel (10) comprises a plurality of discharge aperture graduation marks (13) arranged along the circumferential direction, the sleeve (21) is provided with a reference mark (221), the reference mark (221) is aligned with the nozzle (23) along the circumferential direction, each discharge aperture graduation mark (13) is aligned with one discharge hole (11) along the circumferential direction, when the reference mark (221) is aligned with one discharge aperture graduation mark (13) of the plurality of discharge aperture graduation marks, the nozzle (23) is aligned with one discharge hole with corresponding aperture in the discharge hole (11), The method comprises the following steps: Aligning a discharge hole (11) with the largest pore diameter with the nozzle (23) by rotating the inner cylinder (10), and observing the corrosion condition of the tower top crystallization; Rotating the inner cylinder (10) under the condition that the corrosion condition of the tower top crystal is unchanged, and aligning the discharge holes (11) with smaller pore diameters with the nozzles (23) in sequence until the corrosion condition of the tower top crystal becomes worse; stopping rotating the inner cylinder (10), recording the aperture of the discharge hole (11) at the moment, and maintaining the long-term use of the discharge hole with the aperture; after a period of use, if the corrosion effect of the overhead crystals is found to be increased, it is necessary to re-perform the above operation to re-determine the optimum pore size.
  2. 2. The method for the corrosion protection and water injection operation of the top of a fractionating tower according to claim 1, wherein the limiting member (30) comprises a pin socket (31) fixedly connected with the sleeve (21), a spring (32) fixed on the pin socket (31), and a pin head (33) respectively connected with the pin socket (31) and the spring (32), Wherein the pin head (33) is configured to be engageable with the adjustment member (12), and the spring (32) is configured to prevent the pin head (33) from being disengaged from the adjustment member (12).
  3. 3. The method of anticorrosive water injection operation on top of a fractionation tower according to claim 2, wherein the regulating member (12) comprises a ratchet (121) fixed on the outer circumference of the inner cylinder (10).
  4. 4. A fractionation column top corrosion protection water injection process according to claim 3, wherein the pin head (33) comprises a first portion (34) engaging with a ratchet tooth (122) of the ratchet wheel (121) to prevent further movement of the ratchet wheel (121), and a second portion (35) being snapped onto the pin socket (31) through a through hole (36).
  5. 5. The method of anticorrosive water injection operation at the top of a fractionation tower according to claim 4, wherein the second portion (35) is provided with a mounting hole (351) for connection with the spring (32).
  6. 6. The method for the corrosion protection water injection operation of the top of a fractionating tower according to claim 5, wherein the sleeve (21) comprises a tray seat (22) installed on the top, a plurality of insertion holes (222) for fixing the pin sockets (31) are arranged on the tray seat (22), and the reference marks (221) are arranged on the outer surface of the tray seat (22).
  7. 7. The method for corrosion protection and water injection operation of a fractionation column top according to claim 6, wherein the upper part of the pin socket (31) is provided with a limit cap to prevent the pin head (33) from falling off, and/or The spring (32) is bent after passing through the pin head.

Description

Screw-type adjusting spray head and anti-corrosion water injection operation method for fractionating tower top Technical Field The invention relates to the field of anti-corrosion equipment, in particular to a screwing type adjusting spray head for water injection of a fractionating tower and an anti-corrosion water injection operation method for the top of the fractionating tower. Background At present, the corrosion of the top of the fractionating tower commonly occurs in petroleum refining enterprises, and the water injection treatment mode is adopted to control the corrosion speed of the top of the fractionating tower in general. For this reason, most petroleum refining enterprises design various water injection nozzle structures for corrosion prevention, but the corrosion condition of the fractionating tower top still cannot be controlled. CN212143094U discloses a simple adjustable spray head, which comprises a spray pipe, a striking ball, a fixing rod and a claw nut. The impact ball is fixed on the fixed rod and is arranged at the water outlet of the nozzle pipe. The fixed rod is connected with the nozzle pipe by adopting a sliding structure, and the position of the fixed rod is adjusted by the claw nut to adjust the position of the impact ball at the water outlet of the nozzle pipe. The relative positions of the impact ball and the water spraying pipe orifice are adjusted according to different purposes, so that water flows with different shapes can be obtained in different water use occasions, and gradually-expanded conical water spray and remote water column water spray can be sprayed. But this structure still does not solve the problem of corrosion at the top of the fractionation column. In addition, CN110622837a also does not have the capability to solve the above-mentioned problems. Therefore, how to improve the corrosion condition of the top of the fractionating tower is a technical problem to be solved. Disclosure of Invention The invention aims to provide a screwing type adjusting spray head for water injection of a fractionating tower, which can adjust the aperture of a discharge hole aligned with a spray nozzle by rotating an inner cylinder, so as to determine the optimal spray aperture and further realize corrosion control on tower top crystals. The invention also aims to provide an anti-corrosion water injection operation method for the top of the fractionating tower. According to a first aspect of the present invention there is provided a screw-on type adjustment head for the injection of water from a fractionation column comprising a spray assembly comprising a sleeve and a nozzle provided at the bottom of the sleeve, an inner barrel inserted into the sleeve for injecting fluid, the inner barrel comprising a plurality of differently sized discharge holes arranged circumferentially through the wall of the inner barrel, and an adjustment member secured to the inner barrel, and a stop member fixedly connected to the top of the sleeve, the stop member being engageable with the adjustment member to prevent rotation of the adjustment member, wherein the nozzle is aligned with one of the discharge holes by rotation of the inner barrel to allow fluid to be ejected from the nozzle. In one embodiment, the limiting member comprises a pin socket fixedly connected with the sleeve, a spring fixed on the pin socket, and a pin head respectively connected with the pin socket and the spring, wherein the pin head is configured to be engaged with the adjusting member, and the spring is configured to prevent the pin head from being disengaged from the adjusting member. In one embodiment, the adjustment member includes a ratchet fixed to the outer periphery of the inner barrel. In one embodiment, the pin head includes a first portion that engages the ratchet teeth of the ratchet wheel to prevent further movement of the ratchet wheel, and a second portion that snaps onto the pin receptacle through the through hole. In one embodiment, the second portion is provided with mounting holes for connection with the springs. In one embodiment, the inner barrel includes a plurality of discharge aperture graduation marks disposed circumferentially thereon, and the sleeve is provided with a fiducial mark, wherein the nozzle is aligned with one of the discharge apertures having a corresponding aperture when the fiducial mark is aligned with one of the plurality of discharge aperture graduation marks. In one embodiment, the sleeve comprises a tray mounted on top, the tray being provided with a plurality of receptacles for securing the pin receptacles, the fiducial markers being provided on an outer surface of the tray. In one embodiment, the upper part of the pin socket is provided with a limit cap for preventing the pin head from falling off, and/or the spring is bent after penetrating through the pin head. According to a second aspect of the invention, there is provided a method of corrosion protection water injection o