CN218581588U - Corrosion inhibitor filling system - Google Patents
Corrosion inhibitor filling system Download PDFInfo
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- CN218581588U CN218581588U CN202222878030.5U CN202222878030U CN218581588U CN 218581588 U CN218581588 U CN 218581588U CN 202222878030 U CN202222878030 U CN 202222878030U CN 218581588 U CN218581588 U CN 218581588U
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- temperature corrosion
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Abstract
The utility model relates to a with the filling device field that the slow-release agent postpones equipment corrosion, concretely relates to corrosion inhibitor filling system. The low-temperature corrosion inhibitor filling unit comprises a first filling pump and a reflux pipeline at the top of the fractionating tower, wherein the inlet of the first filling pump is connected with a low-temperature corrosion inhibitor storage tank, and the outlet of the first filling pump is connected to a pipeline between the top of the fractionating tower and the air cooler; the high-temperature corrosion inhibitor filling unit comprises a second filling pump and a raw oil supply pipeline for supplying materials to the fractionating tower, a raw oil storage tank, a supply pump, a first heater, a second heater and a heating furnace are sequentially arranged in the raw oil supply pipeline along the flowing direction of the raw oil, the inlet of the second filling pump is connected with the high-temperature corrosion inhibitor storage tank, and the outlet of the second filling pump is connected to a pipeline between the second heater and the heating furnace. The utility model provides a corrosion inhibitor filling system designed aiming at the characteristics of different equipment corrosion rates of a fractionating tower of a raw material pretreatment system under different temperature gradients.
Description
Technical Field
The utility model relates to a with the filling device field that the slow-release agent postpones equipment corrosion, concretely relates to corrosion inhibitor filling system.
Background
The corrosion inhibitor is an auxiliary material necessary in petrochemical production, can effectively slow down or prevent the corrosion damage of a metal structure by adding a small amount of corrosion inhibitor into a corrosion medium, reduces links such as maintenance and the like, ensures the normal operation of equipment, improves the safety coefficient of equipment operation, has obvious economic value, and has simpler use, lower overall price and obvious effect compared with other corrosion prevention methods.
The corrosion inhibitor is generally added to a raw material pretreatment system in the petrochemical industry to reduce equipment corrosion, but the raw material oil pretreatment system has complex operation conditions and different corrosion types of equipment caused by different media, temperature and the like, at present, the corrosion inhibitor is added to a raw material oil storage tank in the petrochemical industry and then added to the system through a feeding pump and the raw material oil, and only the high-temperature corrosion inhibitor with higher price can be selected. The corrosion inhibitor is injected into a raw oil storage tank, so that the defects of large consumption of the corrosion inhibitor, uneven mixing, single type of the corrosion inhibitor, unstable corrosion inhibitor entering a raw material pretreatment system and the like are caused, the utilization rate of the corrosion inhibitor is low, the slow release effect of the corrosion inhibitor cannot be exerted to the maximum, equipment in the petrochemical industry is corroded seriously and is frequently replaced, and the cost of maintaining and replacing pipelines is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the defect of adding is carried out to the different characteristics of equipment corrosion rate under the different temperature gradients of raw materials pretreatment system fractionating tower to current corrosion inhibitor, a neotype corrosion inhibitor filling system is provided.
The utility model provides an above-mentioned technical problem's technical scheme as follows:
a corrosion inhibitor filling system is used for a fractionating tower and is characterized by comprising a low-temperature corrosion inhibitor filling unit and a high-temperature corrosion inhibitor filling unit,
the low-temperature corrosion inhibitor filling unit comprises a first filling pump and a reflux pipeline arranged at the top of the fractionating tower, an air cooler, a water cooler, a buffer tank and a reflux pump are sequentially arranged in the reflux pipeline along the flow direction of a fluid, the inlet of the first filling pump is connected with a low-temperature corrosion inhibitor storage tank, and the outlet of the first filling pump is connected to a pipeline between the top of the fractionating tower and the air cooler;
the high-temperature corrosion inhibitor filling unit comprises a second filling pump and a raw oil supply pipeline for supplying materials to the fractionating tower, a raw oil storage tank, a supply pump, a first heater, a second heater and a heating furnace are sequentially arranged in the raw oil supply pipeline along the flowing direction of the raw oil, the inlet of the second filling pump is connected with the high-temperature corrosion inhibitor storage tank, and the outlet of the second filling pump is connected to a pipeline between the second heater and the heating furnace.
Furthermore, the low-temperature corrosion inhibitor is a water-soluble low-temperature corrosion inhibitor, and the high-temperature corrosion inhibitor is an oil-soluble high-temperature corrosion inhibitor.
Furthermore, a branch pipe for separating out light components is arranged on a pipeline between the outlet of the reflux pump of the reflux pipeline and the fractionating tower.
Further, the raw oil feed line is connected to the lower part of the fractionation tower.
The utility model has the advantages that:
the utility model is designed aiming at the different corrosion rates of the equipment under different temperature gradients of the fractionating tower, the tower top adopts the low-temperature corrosion inhibitor to prevent corrosion, and the lower part and the middle part of the tower adopt the high-temperature corrosion inhibitor to prevent corrosion, compared with the prior art that the whole corrosion of the tower can only adopt the high-temperature corrosion inhibitor, the cost is higher, the adding amount is large, and the refined corrosion prevention scheme of the scheme effectively improves the utilization rate of the corrosion inhibitor and reduces the cost; when the system is used, along with the continuous addition of the high-temperature corrosion inhibitor and the low-temperature corrosion inhibitor, a firm and reliable protective film is formed inside corresponding equipment and a pipeline, so that the system has an effective scale and corrosion inhibition effect, the maintenance cost of the equipment is effectively reduced, and the operation period of the equipment is prolonged.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
in the figure: 1. the system comprises a fractionating tower, 2 parts of a heavy component discharge pipeline, 3 parts of a low-temperature corrosion inhibitor storage tank, 4 parts of a first filling pump, 5 parts of an air cooler, 6 parts of a water cooler, 7 parts of a buffer tank, 8 parts of a reflux pump, 9 parts of a branch pipe, 10 parts of a raw oil storage tank, 11 parts of a feeding pump, 12 parts of a first heater, 13 parts of a second heater, 14 parts of a heating furnace, 15 parts of a high-temperature corrosion inhibitor storage tank and 16 parts of a second filling pump.
Detailed Description
The principles and features of the present invention will be described with reference to the drawings, which are provided for illustration purposes only and are not intended to limit the scope of the present invention.
As shown in fig. 1, the corrosion inhibitor filling system of the embodiment is used for a fractionating tower 1, a heavy component discharge pipeline 2 is arranged at the bottom of the fractionating tower 1, and a reflux line is arranged at the top of the fractionating tower. An air cooler 5, a water cooler 6, a buffer tank 7 and a reflux pump 8 are sequentially arranged in the reflux pipeline along the flowing direction of fluid, and a branch pipe 9 for separating light components is arranged on a pipeline between the outlet of the reflux pump 8 of the reflux pipeline and the fractionating tower 1.
A raw oil supply pipeline is connected to the lower portion of the fractionating tower 1, and a raw oil storage tank 10, a supply pump 11, a first heater 12, a second heater 13 and a heating furnace 14 are sequentially arranged in the raw oil supply pipeline along the flow direction of the raw oil.
In the embodiment, a low-temperature corrosion inhibitor storage tank 3 and a first filling pump 4 are arranged, and the low-temperature corrosion inhibitor storage tank 3 is connected to a pipeline between the tower top and an air cooler 5 through the first filling pump 4; a high-temperature corrosion inhibitor storage tank 15 and a second filling pump 16 are also arranged, and the high-temperature corrosion inhibitor storage tank 15 is connected to a pipeline between the second heater 13 and the heating furnace 14 through the second filling pump 16.
The reflux pipeline, the low-temperature corrosion inhibitor storage tank 3 and the first filling pump 4 form a low-temperature corrosion inhibitor filling unit, and the raw oil supply pipeline, the high-temperature corrosion inhibitor storage tank 15 and the second filling pump 16 form a high-temperature corrosion inhibitor filling unit.
Preferably, the low-temperature corrosion inhibitor is water-soluble low-temperature corrosion inhibitor, can select 7019 corrosion inhibitor sold in the market, and the addition amount is 85ppm; the high-temperature corrosion inhibitor is oil-soluble, and can be selected from commercially available RX-102 high-temperature oil-soluble corrosion inhibitor with the addition amount of 65ppm.
When the system is used, the control valves and various devices of the low-temperature corrosion inhibitor filling unit and the high-temperature corrosion inhibitor filling unit are opened. The temperature of the raw oil between the second heater 13 and the heating furnace 14 can reach 265-280 ℃, and through analysis and test of technicians, the best anti-corrosion effect can be achieved by adding the high-temperature corrosion inhibitor at the position. After the high-temperature corrosion inhibitor is added, the raw oil enters the fractionating tower 1 from the lower part of the fractionating tower 1 through the heating furnace 14, a protective film is formed at the lower part and the middle part of the fractionating tower 1, and the protective film is also formed in the heating furnace 14. The low-temperature corrosion inhibitor is pumped into the return pipeline by the first filling pump 4 and flows along with the return pipeline, the air cooler 5, the water cooler 6, the buffer tank 7, the return pump 8 and the top of the tower to form a protective film, so that the scale inhibition and corrosion prevention effects are achieved. With the continuous addition of the high-temperature corrosion inhibitor and the low-temperature corrosion inhibitor, a firm and reliable protective film is formed inside corresponding equipment and pipelines, so that the effective scale inhibition and corrosion prevention effects are achieved, the maintenance cost of the equipment is effectively reduced, and the operation period of the equipment is prolonged.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (4)
1. A corrosion inhibitor filling system is used for a fractionating tower (1) and is characterized by comprising a low-temperature corrosion inhibitor filling unit and a high-temperature corrosion inhibitor filling unit,
the low-temperature corrosion inhibitor filling unit comprises a first filling pump (4) and a reflux pipeline arranged at the top of the fractionating tower (1), an air cooler (5), a water cooler (6), a buffer tank (7) and a reflux pump (8) are sequentially arranged in the reflux pipeline along the flow direction of fluid, the inlet of the first filling pump (4) is connected with a low-temperature corrosion inhibitor storage tank (3), and the outlet of the first filling pump is connected to a pipeline between the top of the fractionating tower and the air cooler (5);
the high-temperature corrosion inhibitor filling unit comprises a second filling pump (16) and a raw oil supply pipeline for supplying materials to the fractionating tower (1), a raw oil storage tank (10), a supply pump (11), a first heater (12), a second heater (13) and a heating furnace (14) are sequentially arranged in the raw oil supply pipeline along the flowing direction of raw oil, and an inlet of the second filling pump (16) is connected with a high-temperature corrosion inhibitor storage tank (15) and an outlet of the second filling pump is connected to a pipeline between the second heater (13) and the heating furnace (14).
2. The corrosion inhibitor dosing system of claim 1, wherein the low temperature corrosion inhibitor is a water soluble low temperature corrosion inhibitor and the high temperature corrosion inhibitor is an oil soluble high temperature corrosion inhibitor.
3. The corrosion inhibitor filling system according to claim 1 or 2, wherein a branch pipe (9) for separating out light components is provided on a pipe between the outlet of the reflux pump (8) of the reflux line and the fractionating column (1).
4. The corrosion inhibitor filling system according to claim 1, wherein the raw oil feed line is connected to a lower portion of the fractionation column (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222878030.5U CN218581588U (en) | 2022-10-31 | 2022-10-31 | Corrosion inhibitor filling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222878030.5U CN218581588U (en) | 2022-10-31 | 2022-10-31 | Corrosion inhibitor filling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218581588U true CN218581588U (en) | 2023-03-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222878030.5U Active CN218581588U (en) | 2022-10-31 | 2022-10-31 | Corrosion inhibitor filling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218581588U (en) |
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2022
- 2022-10-31 CN CN202222878030.5U patent/CN218581588U/en active Active
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