Blow-off pipeline for side wall of dilution steam generator in ethylene quenching area
By introducing a side-wall blowdown system into the ethylene quench zone dilution steam generator, the problem of blockage in the bottom blowdown pipeline was solved, enabling efficient production of dilution steam and long-term operation of the heat exchanger, thus ensuring the stable operation of the cracking furnace.
Patent Information
- Application Number
- CN202520082671.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-14
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-01-14
AI Technical Summary
The bottom drain line of the ethylene cracking dilution steam generation system is prone to blockage, which leads to the accumulation of solid impurities inside the heat exchanger, affecting heat exchange efficiency and dilution steam quality, shortening the operating cycle, and affecting the stable operation of the cracking furnace.
Design a sewage pipeline that includes a bottom and sidewall sewage drainage system. The sidewall sewage drainage system can be used to replace the bottom sewage drainage system when it is blocked. The system is equipped with a flow monitoring device and an anti-backflow device to ensure that impurities are discharged in a timely manner and to prevent backflow.
It effectively extends the operating cycle of the heat exchanger, improves the quality and output of dilution steam, and ensures the long-term operation of the pyrolysis furnace.
Smart Images
Figure CN223740775U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steam generator draining devices, and more specifically, to a draining pipeline for the side wall of a dilution steam generator in the ethylene quench zone. Background Technology
[0002] Currently, in the ethylene cracking dilution steam generation system, the original design included a 2-inch drain line at the bottom of each heat exchanger for periodically removing solid impurities to ensure heat exchange efficiency and dilution steam quality. However, under current operating conditions, these drain lines frequently become clogged, eventually becoming completely blocked after several drainage cycles. This prevents the timely removal of solid impurities from the heat exchanger, causing them to accumulate inside, leading to a rapid decline in heat exchange efficiency, significantly insufficient steam production, a drastically shortened operating cycle, and increased shutdowns for high-pressure cleaning. The quality and output of the dilution steam directly impact the stable operation of the cracking furnace. To ensure the long-term operation of the cracking furnace, the dilution steam system must operate stably. Utility Model Content
[0003] In response to the aforementioned technical problems, a drain line for the side wall of a dilution steam generator in the ethylene quench zone is provided.
[0004] The technical means adopted in this utility model are as follows:
[0005] A side wall drain line for a dilution steam generator in the ethylene quench zone includes: a bottom drain system and a side wall drain system;
[0006] The bottom drainage system includes a first drainage pipeline, a bottom drainage valve, a bottom drainage root valve, and a bottom drainage guide valve;
[0007] The side wall drainage system includes a second drainage pipeline, a side wall drainage root valve, and a side wall drainage guide valve. One side of the side wall drainage pipeline is connected to the first drainage pipeline, and the other side is fixedly connected to the bottom of the steam generator.
[0008] Furthermore, the bottom drain valve, the first bottom drain guide valve, and the bottom drain root valve are sequentially connected to the first drain pipeline;
[0009] The side wall drain valve and the side wall drain guide valve are connected in sequence to the second drain pipeline.
[0010] Furthermore, when the bottom drain valve is blocked by impurities such as coke powder, but the downstream flow from the bottom drain root valve is unobstructed, the discharge can be carried out by opening the side wall drain valve and the bottom drain root valve. After the discharge time is 5-10 minutes, the side wall drain valve and the bottom drain root valve are closed.
[0011] Furthermore, the side wall drain line is equipped with a flow monitoring device, which can monitor the side wall drain flow in real time, thereby helping to determine the scaling situation at the bottom of the heat exchanger and the heat exchange effect.
[0012] Furthermore, an anti-backflow device is installed at the connection between the side wall drain pipe and the original drain pipe to prevent impurities from flowing back into the heat exchanger.
[0013] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:
[0014] 1. This utility model provides a side wall drain line for a dilution steam generator in the ethylene quench zone. Even when the bottom drain line is blocked, the side wall drain line can continue to drain the bottom of the heat exchanger, ensuring the water quality and dilution steam quality at the bottom of the heat exchanger, while effectively slowing down the rate of decrease in heat exchange efficiency.
[0015] 2. This utility model provides a drain pipe for the side wall of a dilution steam generator in the ethylene quench zone, which can determine the degree of scaling at the bottom of the heat exchanger based on whether the side wall drain is unobstructed. When new side wall drain blockage occurs, it can be known in advance that there are too many solid impurities at the bottom of the heat exchanger, and the steam production of the heat exchanger will drop significantly, so that it can be emptied and high-pressure cleaned in time.
[0016] 3. The present invention provides a side wall drain line for a dilution steam generator in the ethylene quench zone. After the side wall drain line is put into use, impurities at the bottom can be discharged in time, the efficiency of the heat exchanger is improved, and the operating cycle is significantly extended.
[0017] Based on the above reasons, this utility model can be widely promoted in the field of steam generator sewage discharge. Attached Figure Description
[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0019] Figure 1 This is a schematic diagram of a drain pipe on the side wall of a dilution steam generator for ethylene quenching zone, as described in this utility model.
[0020] In the diagram: 1. Steam generator; 2. Side wall drain valve; 3. Bottom drain valve; 4. Bottom drain valve; 5. Side wall drain valve; 6. Bottom drain valve; 7. First drain line; 8. Second drain line. Detailed Implementation
[0021] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.
[0022] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.
[0023] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0024] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0025] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
[0026] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0027] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.
[0028] like Figure 1 As shown, this utility model provides a side wall drain pipeline for a dilution steam generator in the ethylene quench zone, including: a bottom drain system and a side wall drain system;
[0029] The bottom drainage system includes a first drainage pipeline 7, a bottom drainage valve 3, a bottom drainage root valve 4, and a bottom drainage guide valve 6.
[0030] The side wall drainage system includes a second drainage pipeline 8, a side wall drainage root valve 2, and a side wall drainage guide valve 5. One side of the side wall drainage pipeline is connected to the first drainage pipeline 7, and the other side is fixedly connected to the bottom of the steam generator 1.
[0031] Furthermore, the opening positions are precisely measured and marked on the bottom side wall of the dilution steam generator 1. The opening is then made using professional tools to ensure that the opening size is accurate and the edges are smooth, thus avoiding damage to the equipment body. The prepared 2-inch drain pipe is hoisted to the installation position and connected to the opening on the bottom side wall of the generator using reliable methods such as welding or flange connection. The welding quality and sealing performance are strictly controlled to ensure that the connection is firm and leak-free.
[0032] Install the side wall drain root valve 2, bottom drain valve 3, bottom drain root valve 4, side wall drain guide valve 5, and bottom drain guide valve 6 in sequence, ensuring that the valves are installed in the correct direction and operate flexibly, and perform corresponding debugging and inspection.
[0033] Furthermore, the bottom drain valve 3, the first bottom drain guide valve 6, and the bottom drain root valve 4 are sequentially connected to the first drain pipeline 7;
[0034] The side wall drain valve 2 and the side wall drain guide valve 5 are connected in sequence to the second drain pipeline 8.
[0035] Furthermore, when the bottom drain valve 3 is blocked by impurities such as coke powder, but the flow from the bottom drain root valve 4 to the downstream path is unobstructed, the discharge can be carried out by opening the side wall drain valve and the bottom drain root valve 4. After the discharge time is 5-10 minutes, the side wall drain valve and the bottom drain root valve 4 are closed.
[0036] Furthermore, if the bottom drain valve 3, bottom drain root valve 4 and the downstream flow are completely blocked, the side wall drain valve 5 can be connected to a metal hose to discharge to a safe position. Drainage can be carried out by opening the side wall drain root valve 2. After the discharged water is clear, the side wall drain root valve 2 and side wall drain valve 5 can be closed.
[0037] Furthermore, the side wall drain line is equipped with a flow monitoring device, which can monitor the side wall drain flow in real time, thereby helping to determine the scaling situation at the bottom of the heat exchanger and the heat exchange effect.
[0038] Furthermore, an anti-backflow device is provided at the connection between the first sewage pipeline 7 and the second sewage pipeline 8 to prevent impurities from flowing back into the heat exchanger.
[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. An ethylene quench zone dilution steam generator sidewall blowdown line comprising, The utility model relates to a heat exchanger bottom blowdown system, comprising: a bottom blowdown system and a side wall blowdown system; the bottom blowdown system comprises a first blowdown pipeline, a bottom blowdown valve, a bottom blowdown root valve and a bottom blowdown pilot valve; the side wall blowdown system comprises a second blowdown pipeline, a side wall blowdown root valve and a side wall blowdown pilot valve, one side of the second blowdown pipeline being connected to the first blowdown pipeline and the other side being fixedly connected to the bottom of the steam generator.
2. A quench zone dilution steam generator sidewall blowdown line for ethylene according to claim 1, wherein, the bottom blowdown valve, the first bottom blowdown pilot valve and the bottom blowdown root valve are sequentially connected to the first blowdown pipeline; the side wall blowdown root valve and the side wall blowdown pilot valve are sequentially connected to the second blowdown pipeline.
3. A quench zone dilution steam generator sidewall blowdown line for use in ethylene according to claim 1, characterized by, when the bottom blowdown valve is blocked by impurities but the bottom blowdown root valve is unobstructed, the side wall blowdown valve and the bottom blowdown root valve can be opened to discharge, and the side wall blowdown valve and the bottom blowdown root valve are closed after 5-10 minutes of discharge.
4. A quench zone dilution steam generator sidewall blowdown line for ethylene according to claim 1, wherein, the side wall blowdown pipeline is provided with a flow monitoring device, which can monitor the side wall blowdown flow in real time to assist in judging the bottom fouling and heat exchange of the heat exchanger.
5. A quench zone dilution steam generator sidewall blowdown line for ethylene according to claim 1, wherein, a backflow prevention device is arranged at the connection between the side wall blowdown pipeline and the original blowdown pipeline to prevent impurities from flowing back to the inside of the heat exchanger.