Device for adjusting steam by using ejector
Through the combination of the ejector and related components, efficient steam regulation is achieved, the problems of steam consumption and energy consumption in the steam stripping method are solved, and significant energy saving effects are achieved.
Patent Information
- Application Number
- CN202422247466.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The existing steam stripping method has high steam consumption and large energy consumption during the temperature reduction and pressure reduction process, especially the energy loss during the temperature reduction and pressure reduction process of medium-pressure steam.
The ejector, Laval nozzle, expansion pipe, desalted water component, pressure regulating component and temperature regulating component are combined to achieve steam pressure reduction and temperature control through mixing high-pressure steam with low-pressure steam and regulating with desalted water, thus making full use of the energy of high-pressure steam.
The steam consumption in the steam stripping method and the energy consumption in the temperature and pressure reduction process are reduced, with significant energy-saving effects. The high-pressure steam consumption is reduced by 10% and the desalted water consumption is reduced by 50%.
Smart Images
Figure CN223329075U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a device for regulating steam using an ejector. Background Art
[0002] Sulfur-containing wastewater from refineries, particularly those processing sour crude oil, can contain sulfur levels as high as several thousand or even tens of thousands of mg / L, along with significant amounts of ammonia, phenols, and cyanide. Pretreatment is typically required to remove most of the sulfur, ammonia, and other impurities before it can enter a wastewater treatment plant. Pretreatment methods for sulfur-containing wastewater include air oxidation, steam stripping, electropurification, SBR denitrification, chemical precipitation, ozone-activated carbon combination, and wet air oxidation. Steam stripping is the most widely used method both domestically and internationally. However, steam stripping requires relatively high steam temperatures, and while the system pipelines deliver 1.0 MPa of steam, the actual pressure entering the steam stripping unit is often only 0.8 MPa. This low steam pressure cannot meet production requirements. At present, the water vapor stripping method mostly uses 3.5MPa medium-pressure steam with reduced temperature and pressure and 0.8MPa III catalytic low-pressure steam as the heating heat source. In order to ensure that the III catalytic low-pressure steam can smoothly enter the device, the medium-pressure steam needs to be cooled and reduced to about 0.85MPa. There is a certain amount of energy loss in this process. Utility Model Content
[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.
[0004] The technical problem to be solved by the utility model is how to reduce the steam consumption in the steam stripping method and the energy consumption in the process of temperature reduction and pressure reduction.
[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: A device for regulating steam using an ejector, comprising an ejector, a Rafael nozzle, an expansion pipe, a first input pipe, a second input pipe, an output pipe, a desalted water component, a pressure regulating component and a temperature regulating component, wherein the Rafael nozzle is arranged in the ejector, the expansion pipe is arranged on the ejector for reducing the pressure of steam, the first input pipe is arranged at an end of the ejector away from the expansion pipe for connecting with external high-pressure steam, the second input pipe is arranged at an end of the ejector close to the expansion pipe for connecting with external low-pressure steam, the output pipe is arranged at the output end of the expansion pipe for transporting steam after temperature and pressure reduction, the desalted water component is arranged on the expansion pipe, the pressure regulating component is arranged on the ejector for regulating the flow of high-pressure steam entering the ejector, and the temperature regulating component is arranged on the desalted water component for regulating the flow of desalted water entering the expansion pipe.
[0006] As a preferred solution of the device for steam regulation using an ejector as described in the present invention, the desalted water component includes a third input pipe and a desalted water nozzle, the third input pipe is arranged on the expansion tube, the desalted water nozzle is arranged at the output end of the third input pipe, the input end of the third input pipe is connected to external desalted water, the desalted water is ejected through the desalted water nozzle and mixed with the steam so as to control the steam at an appropriate temperature.
[0007] As a preferred solution of the device for steam regulation using an ejector as described in the present invention, the pressure regulating assembly includes a first regulating valve and a pressure gauge, the first regulating valve is arranged at the high-pressure steam outlet in the ejector, the pressure gauge is arranged on the output pipe, and the pressure gauge is electrically connected to the first regulating valve. The suction force is controlled by controlling the flow rate of high-pressure steam to achieve flow regulation of low-pressure steam, thereby stabilizing the outlet pressure.
[0008] As a preferred solution of the device for steam regulation using an ejector as described in the present invention, the temperature control component includes a second regulating valve and a temperature detector, the second regulating valve is arranged on the third input pipe, the temperature detector is arranged on the output pipe, the temperature detector is electrically connected to the second regulating valve, and the flow rate of the desalted water is controlled by feedback from the temperature detector to stabilize the temperature of the output steam.
[0009] Beneficial effects: This device fully utilizes the energy of high-pressure steam decompression through the cooperation of the ejector, Laval nozzle, expansion tube, desalted water component, pressure regulating component and temperature regulating component, so as to reduce the steam consumption in the steam stripping method and the energy consumption in the temperature and pressure reduction process. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:
[0011] Figure 1 This is a schematic diagram of the overall structure of a device using an ejector for steam regulation.
[0012] In the figure: 1. Ejector; 2. Rafale nozzle; 3. Expansion tube; 4. First input pipe; 5. Second input pipe; 6. Output pipe; 7. Desalted water assembly; 71. Third input pipe; 72. Desalted water nozzle; 8. Pressure regulating assembly; 81. First regulating valve; 82. Pressure gauge; 9. Temperature regulating assembly; 91. Second regulating valve; 92. Temperature gauge. DETAILED DESCRIPTION
[0013] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.
[0014] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0015] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.
[0016] Example
[0017] Reference Figure 1This embodiment provides a device for regulating steam using an ejector, including an ejector 1, a Rafael nozzle 2, an expansion pipe 3, a first input pipe 4, a second input pipe 5, an output pipe 6, a desalted water component 7, a pressure regulating component 8, and a temperature regulating component 9. The Rafael nozzle 2 is arranged in the ejector 1, and the expansion pipe 3 is arranged on the ejector 1 for reducing the pressure of steam. The first input pipe 4 is arranged at the end of the ejector 1 away from the expansion pipe 3 for communicating with external high-pressure steam. The second input pipe 5 is arranged at the end of the ejector 1 close to the expansion pipe 3 for communicating with external low-pressure steam. The output pipe 6 is arranged at the output end of the expansion pipe 3 for transporting steam after temperature and pressure reduction. The desalted water component 7 is arranged on the expansion pipe 3. The pressure regulating component 8 is arranged on the ejector 1 for regulating the flow of high-pressure steam entering the ejector 1. The temperature regulating component 9 is arranged on the desalted water component 7 for regulating the flow of desalted water entering the expansion pipe 3.
[0018] The ejector 1 serves as the installation base of the present device. A mixing chamber is provided at the right end inside the ejector 1. The Rafale nozzle 2 is installed in the mixing chamber of the ejector 1 so that high-pressure steam and low-pressure steam can mix in the mixing chamber and exchange energy. An expansion pipe 3 is installed at the right end of the ejector 1. The mixing chamber and the interior of the expansion pipe 3 are connected so that the mixed steam can enter the expansion pipe 3, be decelerated and reduced to an appropriate pressure, and form medium-pressure steam. A first input pipe 4 is connected to the end of the ejector 1 away from the expansion pipe 3. The outlet end of the first input pipe 4 is connected to the interior of the ejector 1, and the inlet end of the first input pipe 4 is connected to the external high-pressure steam so that the external high-pressure steam can enter the interior of the ejector 1 through the first input pipe 4 and be ejected through the Rafale nozzle 2. A second input pipe 5 is connected to the end of the ejector 1 close to the expansion pipe 3. The outlet end of the second input pipe 5 is connected to the mixing chamber inside the ejector 1, and the inlet end of the second input pipe 5 is connected to the The external low-pressure steam is connected so that the external low-pressure steam phase can enter the mixing chamber of the ejector 1 through the second input pipe 5. An output pipe 6 is connected to the output end of the expansion pipe 3 to transport the formed low-temperature and low-pressure steam. A desalted water component 7 is installed on the expansion pipe 3, and the temperature of the steam can be adjusted by the desalted water component 7. A pressure regulating component 8 is installed on the ejector 1, and the pressure regulating component 8 can be used to adjust the flow rate of the high-pressure steam entering the ejector 1, thereby controlling the suction force generated by the Rafale nozzle 2 when ejecting high-pressure steam, so as to make full use of the energy generated by the high-pressure steam during the decompression process, so as to inhale low-pressure steam, thereby reducing the steam consumption in the water vapor stripping method. A temperature regulating component 9 is installed on the desalted water component 7, and the temperature regulating component 9 can realize precise control of the flow rate of the desalted water entering the expansion pipe 3, so as to reduce the energy consumption of the desalted water in the mixed steam during the cooling and decompression process, and can also accurately control the temperature of the steam after decompression.
[0019] Specifically, the desalted water component 7 includes a third input pipe 71 and a desalted water nozzle 72. The third input pipe 71 is arranged on the expansion tube 3, and the desalted water nozzle 72 is arranged at the output end of the third input pipe 71. The input end of the third input pipe 71 is connected to the external desalted water.
[0020] The desalted water component 7 is mainly composed of a third input pipe 71 and a desalted water nozzle 72. The third input pipe 71 is connected to the expansion pipe 3, and the outlet end of the third input pipe 71 extends to the interior of the expansion pipe 3. A desalted water nozzle 72 is installed at the outlet end of the third input pipe 71. The inlet end of the third input pipe 71 is connected to the external desalted water, so that the external desalted water can be sprayed into the expansion pipe 3 through the third input pipe 71 and the desalted water nozzle 72. The desalted water is mixed with the mixed steam to adjust the mixed steam to an appropriate temperature.
[0021] Specifically, the pressure regulating assembly 8 includes a first regulating valve 81 and a pressure gauge 82 . The first regulating valve 81 is arranged at the high-pressure steam outlet in the ejector 1 , and the pressure gauge 82 is arranged on the output pipe 6 . The pressure gauge 82 is electrically connected to the first regulating valve 81 .
[0022] The pressure regulating assembly 8 is mainly composed of a first regulating valve 81 and a pressure gauge 82. The first regulating valve 81 is installed at the high-pressure steam outlet in the ejector 1. The first regulating valve 81 can control the flow of high-pressure steam entering the Rafale nozzle 2 and the suction force formed around the nozzle when the Rafale nozzle 2 ejects high-pressure steam to achieve flow regulation of low-pressure steam. A pressure gauge 82 is installed at the inlet end of the output pipe 6 to detect the pressure of the low-temperature, low-pressure steam flowing out of the outlet of the expansion tube 3. The pressure gauge 82 is electrically connected to the first regulating valve 81 to timely feed back the detected pressure of the low-temperature, low-pressure steam flowing out of the outlet of the expansion tube 3 to the first regulating valve 81, adjust the size of the opening of the first regulating valve 81, control the flow of high-pressure steam, and control the suction force around the Rafale nozzle 2 to achieve flow regulation of low-pressure steam, stabilize the pressure at the outlet of the expansion tube 3, and make full use of the energy generated by the high-pressure steam during the decompression process, thereby reducing the steam consumption in the water vapor stripping method.
[0023] Specifically, the temperature adjustment component 9 includes a second regulating valve 91 and a temperature detector 92 . The second regulating valve 91 is provided on the third input pipe 71 , and the temperature detector 92 is provided on the output pipe 6 . The temperature detector 92 is electrically connected to the second regulating valve 91 .
[0024] The temperature control component 9 is mainly composed of a second regulating valve 91 and a thermometer 92. The second regulating valve 91 is installed on the third input pipe 71 to control the flow of desalted water entering the expansion tube 3, thereby realizing the temperature regulation of the mixed steam. A thermometer 92 is installed at the inlet end of the output pipe 6 to detect the temperature of the low-temperature and low-pressure steam flowing out of the outlet of the expansion tube 3, and the thermometer 92 is electrically connected to the second regulating valve 91 to timely feed back the detected temperature of the low-temperature and low-pressure steam flowing out of the outlet of the expansion tube 3 to the second regulating valve 91, adjust the size of the opening of the second regulating valve 91, accurately control the flow of desalted water, stabilize the temperature of the output steam, thereby reducing the energy consumption of desalted water during the cooling and pressure reduction process of the mixed steam, and realizing automatic control of the flow of desalted water.
[0025] During operation, external high-pressure steam enters the ejector 1 through the first input pipe 4 and is ejected into the mixing chamber of the ejector 1 at a supersonic speed by the Rafale nozzle 2. During this process, pressure energy is converted into velocity energy. At the nozzle outlet, low pressure is formed due to the ejection effect of the high-speed steam flow, which generates a certain suction force. The external low-pressure steam is sucked into the mixing chamber through the second input pipe 5 by the suction force. The low-pressure steam and the high-pressure steam are mixed in the mixing chamber and energy is exchanged. After the mixing is completed, the mixed steam enters the expansion pipe 3. The mixed steam is reduced to a suitable pressure in the expansion pipe 3. In this process, the mixed steam is also mixed with the desalted water ejected by the desalted water nozzle 72. The mixed steam is regulated to an appropriate temperature to form low-temperature and low-pressure steam. The low-temperature and low-pressure steam is then output through the output pipe 6. In this process, the pressure gauge 82 on the output pipe 6 detects the pressure of the low-temperature and low-pressure steam flowing out of the outlet of the expansion pipe 3, and feeds back the detection results to the first regulating valve 81 to adjust the size of the opening of the first regulating valve 81 to control the flow rate of the high-pressure steam to control the Rafale The suction force around the nozzle 2 is used to adjust the flow rate of low-pressure steam, stabilize the pressure at the outlet of the expansion tube 3, and make full use of the energy generated by the high-pressure steam during the decompression process, thereby reducing the steam consumption in the water vapor stripping method, and realizing automatic control of the flow rate of high-pressure steam, which is less affected by the steam pressure fluctuation of the external system; the temperature detector 92 on the output pipe 6 detects the temperature of the low-temperature and low-pressure steam flowing out of the outlet of the expansion tube 3, and feeds the detection results back to the second regulating valve 91, adjusts the size of the opening of the second regulating valve 91, accurately controls the flow rate of desalted water, stabilizes the temperature of the output steam, thereby reducing the energy consumption of desalted water in the mixed steam during the decompression process, and realizing automatic control of the flow rate of desalted water, which is less affected by the steam pressure fluctuation of the external system; when used, the device can fully utilize the surplus 0.8MPa low-pressure steam in the system, while reducing the high-pressure steam consumption by 10% and the desalted water consumption by 50%, with good energy-saving effect, can replace the existing medium-pressure steam decompression device, and is widely used in industrial production processes.
[0026] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.
Claims
1. A device for steam regulation using an ejector, characterized in that: The invention comprises an ejector (1), a Rafael nozzle (2), an expansion pipe (3), a first input pipe (4), a second input pipe (5), an output pipe (6), a desalted water component (7), a pressure regulating component (8) and a temperature regulating component (9), wherein the Rafael nozzle (2) is arranged in the ejector (1), the expansion pipe (3) is arranged on the ejector (1) and is used for reducing the pressure of steam, the first input pipe (4) is arranged at one end of the ejector (1) away from the expansion pipe (3) and is used for connecting to external high-pressure steam, and the second input pipe (5) is provided at the output pipe (6), the desalted water component (7), the pressure regulating component (8) and the temperature regulating component (9), (5) is arranged at one end of the ejector (1) close to the expansion pipe (3) and is used to connect the low-pressure steam outside. The output pipe (6) is arranged at the output end of the expansion pipe (3) and is used to transport the steam after cooling and pressure reduction. The desalted water component (7) is arranged on the expansion pipe (3). The pressure regulating component (8) is arranged on the ejector (1) and is used to adjust the flow rate of the high-pressure steam entering the ejector. The temperature regulating component (9) is arranged on the desalted water component (7) and is used to adjust the flow rate of the desalted water entering the expansion pipe.
2. The device for steam regulation using an ejector according to claim 1, characterized in that: The desalted water component (7) comprises a third input pipe (71) and a desalted water nozzle (72); the third input pipe (71) is arranged on the expansion pipe (3); the nozzle is arranged at the output end of the third input pipe (71); and the input end of the third input pipe (71) is connected to external desalted water.
3. The device for steam regulation using an ejector according to claim 1, characterized in that: The pressure regulating assembly (8) comprises a first regulating valve (81) and a pressure measuring device (82), wherein the first regulating valve (81) is arranged at the high-pressure steam outlet in the ejector (1), and the pressure measuring device (82) is arranged on the output pipe (6), and the pressure measuring device (82) is electrically connected to the first regulating valve (81).
4. The device for steam regulation using an ejector according to claim 2, characterized in that: The temperature control component (9) includes a second regulating valve (91) and a temperature detector (92), wherein the second regulating valve (91) is arranged on the third input pipe (71), and the temperature detector (92) is arranged on the output pipe (6), and the temperature detector (92) is electrically connected to the second regulating valve (91).