Air cooling gas phase flushing system of deoxidation tower

Abstract

The utility model relates to the design of a hollow cooling air phase flushing structure in a naphtha processing flow, in particular to a deoxidation tower air cooling air phase flushing system which comprises an air cooler, the inlet end of the air cooler is connected to the top of a deoxidation tower through a pipeline, and the outlet end of the air cooler is connected to a return tank through a pipeline. A fuel gas pipeline is arranged on the pipeline at the outlet end of the air cooler; a flow regulating valve group and a one-way valve are arranged on the fuel gas pipeline; a flushing line is led out of the fuel gas pipeline between the flow regulating valve group and the one-way valve and is connected to the inlet end of the air cooler, and a control gate valve is arranged on the flushing line; a differential pressure gauge is arranged between the inlet end and the outlet end of the air cooler through a pipeline; air cooling is flushed regularly through fuel gas, accumulation of mechanical impurities in an air cooling tube bundle and a tube box is reduced, and the air cooling operation period is prolonged. The production efficiency of the whole system is improved.

Description

Technical Field

[0001] The utility model relates to an air-cooled gas phase flushing structure design in a naphtha processing flow, in particular to an air-cooled gas phase flushing system for a deoxidation tower. Background Art

[0002] The processed naphtha is relatively dirty, and the air cooling of the deoxidation tower has been running for a long time. Mechanical impurities accumulate in the air cooling tube bundle and tube box of the deoxidation tower, which not only affects the air cooling operation effect, but also reduces the overall production efficiency. Utility Model Content

[0003] In view of the above-mentioned technical problems, the purpose of the utility model is to provide a deoxidation tower air-cooled gas phase flushing system, which regularly flushes the air cooling with fuel gas, reduces the accumulation of mechanical impurities, and prolongs the air cooling operation cycle.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a deoxidation tower air-cooled gas phase flushing system, comprising: an air cooler, the inlet end of the air cooler is connected to the top of the deoxidation tower through a pipeline, the outlet end of the air cooler is connected to the reflux tank through a pipeline, a fuel gas pipeline is arranged on the pipeline at the outlet end of the air cooler, and a flow regulating valve group and a one-way valve are arranged on the fuel gas pipeline; a flushing line is led out from the fuel gas pipeline located between the flow regulating valve group and the one-way valve and connected to the inlet end of the air cooler, and a control gate valve is arranged on the flushing line; a pressure differential gauge is arranged between the inlet end and the outlet end of the air cooler through a pipeline;

[0005] Furthermore, the number of control gate valves on the flushing line is two, which is used to prevent gas from flowing due to the installation of one valve;

[0006] Furthermore, the diameter of the flushing line is DN40;

[0007] Furthermore, the two gate valves are respectively arranged at the ends of the flushing line; the openings of the two gate valves can be adjusted according to the pressure difference;

[0008] Furthermore, the top of the reflux drum is connected to the heating furnace and the flare system through pipelines, so that the gas collected in the reflux drum is sent to the heating furnace and the flare;

[0009] Furthermore, the bottom of the reflux tank is connected to a reflux pump through a pipeline, the outlet pipeline of the reflux pump is connected to the deoxidation tower, and a naphtha feed pipeline is arranged near the deoxidation tower at the outlet pipeline of the reflux pump;

[0010] Furthermore, a regulating valve group is provided on the outlet pipeline of the reflux pump, and a one-way valve is also provided near the reflux pump.

[0011] The operation process of the above structural system is:

[0012] Naphtha enters from the naphtha feed pipeline and enters the deoxidation tower. The gas enters the air cooler through the pipeline at the top of the deoxidation tower, and then enters the reflux tank through the outlet pipeline of the air cooler, and is then sent to the upper heating furnace system through the pipeline. In the above-mentioned gas phase process, fuel gas is used to control the gate valve on the flushing line according to the pressure differential gauge connected to the air cooler, and then the air cooler is flushed. The impurities in the air cooler tube bundle and box are purged and enter the reflux tank. The impurities are discharged through the slag bag connected to the reflux tank, and the liquid in the reflux tank is pumped back to the deoxidation tower by the reflux pump for circulation.

[0013] The beneficial effects of the utility model are:

[0014] The air cooler is flushed regularly with fuel gas to reduce the accumulation of mechanical impurities in the air cooler tube bundle and tube box, extend the air cooler operation cycle, and improve the production efficiency of the entire system. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural diagram of the utility model.

[0016] In the figure, 1, air cooler, 2, deoxygenation tower, 3, reflux tank, 4, fuel gas pipeline, 5, regulating valve group, 6, non-return valve, 7, flushing line, 8, control gate valve, 9, differential pressure gauge, 10, reflux pump, 11, naphtha feed pipeline. Implementation

[0017] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0018] like Figure 1 A deoxidation tower air-cooled gas phase flushing system shown in the figure comprises: an air cooler 1, wherein the inlet end of the air cooler 1 is connected to the top of the deoxidation tower 2 through a pipeline, and the outlet end of the air cooler 1 is connected to the reflux tank 3 through a pipeline, and a fuel gas pipeline 4 is arranged on the pipeline at the outlet end of the air cooler 1, and a flow regulating valve group 5 and a one-way valve 6 are arranged on the fuel gas pipeline 4; a flushing line 7 is led out from the fuel gas pipeline 4 located between the flow regulating valve group 5 and the one-way valve 6 and connected to the inlet end of the air cooler 1, and a control gate valve 8 is arranged on the flushing line 7; a pressure differential gauge 9 is arranged between the inlet end and the outlet end of the air cooler 1 through a pipeline;

[0019] Further, the number of control gate valves 8 on the flushing line 7 is two;

[0020] Furthermore, the diameter of the flushing line 7 is DN40;

[0021] Furthermore, the two gate valves 8 are respectively arranged at the ends of the flushing line 7; the openings of the two gate valves 8 can be adjusted according to the pressure difference;

[0022] Furthermore, the top of the reflux tank 3 is connected to the heating furnace and the flare system through pipelines.

[0023] Furthermore, the bottom of the reflux tank 3 is connected to a reflux pump 10 through a pipeline, the outlet pipeline of the reflux pump 10 is connected to the deoxidation tower 2, and a naphtha feed pipeline 11 is provided at a position of the outlet pipeline of the reflux pump 10 close to the deoxidation tower 2;

[0024] Furthermore, a regulating valve group is provided on the outlet pipeline of the reflux pump 10, and a one-way valve is also provided near the reflux pump.

[0025] The operation process of the above structural system is:

[0026] Naphtha enters from the naphtha feed pipeline 11 and enters the deoxidation tower 2. The gas enters the air cooler 1 through the top pipeline of the deoxidation tower 2, and then enters the reflux tank 3 through the outlet pipeline of the air cooler 1, and is then sent to the upper heating furnace system through the pipeline; in the above-mentioned gas phase process, fuel gas is used to control the gate valve 8 on the flushing line 7 according to the display of the pressure difference meter 9 connected to the air cooler 1, and then the air cooler 1 is flushed; the impurities in the tube bundle and the box of the air cooler 1 are purged and enter the reflux tank 3; the impurities are discharged through the slag bag connected to the reflux tank 3, and the liquid in the reflux tank 3 is pumped back to the deoxidation tower 2 by the reflux pump 10 for circulation.

[0027] The utility model performs valve opening and flushing according to the air cooling pressure difference display, reduces the accumulation of mechanical impurities, and prolongs the air cooling operation cycle.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0029] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0032] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

Claims

1. A deoxidation tower air-cooled gas phase flushing system, characterized in that: include: An air cooler, wherein the inlet end of the air cooler is connected to the top of the deoxygenation tower through a pipeline, the outlet end of the air cooler is connected to the reflux tank through a pipeline, a fuel gas pipeline is arranged on the pipeline at the outlet end of the air cooler, a flow regulating valve group and a one-way valve are arranged on the fuel gas pipeline; a flushing line is led out from the fuel gas pipeline located between the flow regulating valve group and the one-way valve and connected to the inlet end of the air cooler, a control gate valve is arranged on the flushing line; a differential pressure gauge is arranged between the inlet end and the outlet end of the air cooler through a pipeline.

2. A deoxidation tower air-cooled gas phase flushing system according to claim 1, characterized in that: There are two control gate valves on the flushing line.

3. The deoxidation tower air-cooled gas phase flushing system according to claim 1, characterized in that: The pipe diameter of the flushing line is DN40.

4. A deoxidation tower air-cooled gas phase flushing system according to claim 2, characterized in that: The two gate valves are respectively arranged at the ends of the flushing line; the openings of the two gate valves can be adjusted according to the pressure difference.

5. The deoxidation tower air-cooled gas phase flushing system according to claim 1, characterized in that: The top of the reflux tank is connected to the heating furnace and the flare system through pipelines.

6. The deoxidation tower air-cooled gas phase flushing system according to claim 1, characterized in that: The bottom of the reflux tank is connected to a reflux pump through a pipeline, the outlet pipeline of the reflux pump is connected to the deoxidation tower, and a naphtha feed pipeline is arranged near the deoxidation tower at the outlet pipeline of the reflux pump.

7. A deoxidation tower air-cooled gas phase flushing system according to claim 6, characterized in that: A regulating valve group is arranged on the outlet pipeline of the reflux pump, and a one-way valve is also arranged near the reflux pump.

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