Load control device for condenser of crude argon tower
By designing a load control device for the crude argon tower condenser, the problem of low argon extraction caused by excessive liquefied air entering the lower tower was solved, achieving stable control of the condenser load and efficient separation and purification of argon.
Patent Information
- Application Number
- CN202520343860.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-28
- Publication Date
- 2026-02-13
- Estimated Expiration
- 2035-02-28
AI Technical Summary
In existing technologies, excessive liquefied air is directly introduced into the lower column, leading to low argon extraction rates in air separation units.
Design a load control device for a crude argon tower condenser, including a crude argon tower condenser body, a liquid air vapor regulating valve, a crude argon condenser pressure display and control device, a crude argon flow indicator instrument, and a distributed control system. By monitoring and regulating the liquid air vapor flow and pressure, stable control of the condenser load can be achieved.
This improved the argon extraction efficiency of the air separation unit, ensured that the condenser load was within a suitable range, and enhanced the separation and purification effect of argon.
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Figure CN223901254U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to air separation equipment technical field, concretely relates to a crude argon tower condenser load control device. BACKGROUND
[0002] Argon is a rare gas that is widely used in industry. It is very inert, neither burns nor supports combustion, and is very stable chemically.
[0003] Due to the extremely valuable and special chemical and physical properties of argon, it is widely used. In aircraft manufacturing, shipbuilding, atomic energy industry and mechanical industry, special metals such as aluminum, magnesium, copper and its alloys and stainless steel are often used as welding protection gas when welding, to prevent the welded parts from being oxidized or nitrided by air. In the field of electric light source, argon is often used in lighting technology and filled in daylight lamp, photocell, lighting tube, etc. In the aspect of metal smelting, oxygen and argon blowing is an important measure to produce high-quality steel. For the smelting of special metals such as titanium, zirconium and germanium, and in the electronic industry, argon is also needed as a protective gas.
[0004] The production of industrial argon in the world is mainly obtained directly from air by air separation device. Since 1915, the United States Air Products Company began to produce argon by fractionation of liquefied air. Since then, European industrial countries and Japan have also begun to extract argon from air separation devices. In the first few years, the output was very small, only for lighting technology and scientific research. After 1943, with the development of steel and chemical industry, the scale of air separation gradually increased, which laid the foundation for by-product argon, and the production of argon increased rapidly. Since the 1960s of the 20th century, the increase in demand for argon by modern technology has made large-scale air separation devices in the world almost all have argon extraction equipment, but excessive liquefied air directly into the lower tower will cause the air separation device to extract less argon, so it is necessary to make improvements. CONTENT OF THE UTILITY MODEL
[0005] The utility model aims at overcoming the deficiency that excessive liquefied air directly into the lower tower will cause the air separation device to extract less argon in the prior art, and provides a crude argon tower condenser load control device to solve the above problems.
[0006] The utility model discloses a crude argon tower condenser load control device, including crude argon tower condenser main body U2E10, the upper tower pipeline is arranged on the crude argon tower condenser main body U2E10 upper end intercommunication, be equipped with liquid air steam regulating valve FV1712 on the upper tower pipeline, liquid air steam regulating valve FV1712 is connected with crude argon condenser pressure display control equipment PIC1713 and crude argon flow indicating instrument FY1712, crude argon flow indicating instrument FY1712 is connected with crude argon flowmeter FT1712, and the crude argon condenser main body U2E10 is equipped with crude argon tower condenser liquid level LIC1711.
[0007] Preferably, the crude argon condenser pressure display control equipment PIC1713 is connected with a pressure transmitter PT1713.
[0008] Preferably, the crude argon tower condenser main body U2E10 is connected with a communication pipe on one side, and the communication pipe is equipped with a liquid air throttling regulating valve LV1711.
[0009] Preferably, the liquid air throttling regulating valve LV1711 is connected with a liquid air air lift regulating valve HV1721.
[0010] Preferably, the crude argon condenser pressure display control equipment PIC1713, the liquid air steam regulating valve FV1712 and the crude argon flow indicating instrument FY1712 are connected and controlled through a distributed control system DCS.
[0011] Preferably, the distributed control system DCS switches the condenser load of the crude argon condenser pressure display control equipment PIC1713 and the crude argon flow indicating instrument FY1712 to control the liquid air steam regulating valve FV1712.
[0012] The utility model has the advantages of the following:
[0013] The crude argon tower condenser load control device, the crude argon tower condenser main body U2E10 is the core component of the whole device, bears the key operation of cooling, condensing and the like to crude argon, realizes the phase change of substance, so as to achieve the purpose of separating and purifying argon and the like, and the upper tower pipeline is connected with the upper end of the crude argon tower condenser main body U2E10, providing a conveying channel for liquid air steam and the like. The liquid air steam regulating valve FV1712 is installed on the upper tower pipeline, and the main function is to regulate the liquid air steam flow entering the crude argon tower condenser main body U2E10. By changing the flow of liquid air steam, the heat exchange process in the condenser can be affected, thereby affecting the load of the condenser. The crude argon tower condenser liquid level LIC1711 and the crude argon condenser pressure display control device PIC1713 can monitor the working condition of the crude argon tower in real time. These data reflect the working state and processing capacity of the condenser, providing important information about the crude argon processing condition for the operator or control system. The crude argon flow indicating instrument FY1712 plays a key control and monitoring role, connected with the crude argon flowmeter FT1712. The crude argon flowmeter FT1712 can measure the pressure difference flowing through the flowmeter in real time, and convert the pressure difference signal into a transmittable signal form such as an electric signal, and feed back to the crude argon flow indicating instrument FY1712. The crude argon flow indicating instrument FY1712 compares and analyzes the received pressure difference signal with the preset flow control range, realizes the stable control of the pressure of the crude argon tower condenser main body U2E10, and indirectly controls the load of the condenser within a suitable range. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are only one embodiment of the present application, and those skilled in the art can obtain other drawings according to these drawings without creating any creative labor.
[0015] Figure 1 The structure of the present application is shown in the figure.
[0016] The marks in the drawings are:
[0017] 1, crude argon tower condenser main body U2E10; 2, upper tower pipeline; 3, liquid air steam regulating valve FV1712; 4, crude argon condenser pressure display control device PIC1713; 5, crude argon flow indicating instrument FY1712; 6, pressure transmitter PT1713; 7, communication pipe; 8, liquid air throttling regulating valve LV1711; 9, liquid air lifting regulating valve HV1721; 10, crude argon flowmeter FT1712; 11, crude argon tower condenser liquid level LIC1711. DETAILED DESCRIPTION
[0018] In order to make the technical means, creation features, purposes and effects of the utility model easy to understand, the technical solutions in the specific embodiments of the utility model are described clearly and completely below to further illustrate the utility model. Obviously, the described specific embodiments are only part of the embodiments of the utility model, rather than all.
[0019] The following will be combined with the accompanying Figure 1 The utility model is described in further detail.
[0020] Embodiment 1:
[0021] A crude argon tower condenser load control device, including crude argon tower condenser main body U2E101, crude argon condenser main body U2E101 is equipped with crude argon tower condenser liquid level LIC1711, crude argon tower condenser main body U2E101 upper end is connected with upper tower pipeline 2, and the upper tower pipeline 2 is equipped with liquid air steam regulating valve FV17123, and the liquid air steam regulating valve FV17123 is connected with crude argon condenser pressure display control equipment PIC17134 and crude argon flow indicating instrument FY17125, and the crude argon condenser pressure display control equipment PIC17134 is connected with pressure transmitter PT17136, and the crude argon flow indicating instrument FY17125 is connected with differential pressure transmitter FT1712.
[0022] Crude argon tower condenser main body U2E101 is the core component of the whole device, bears the key operation such as cooling, condensation to crude argon, realizes the phase change of material, to reach the purpose such as separation and purification argon, and the upper tower pipeline 2 is connected with the upper end of crude argon tower condenser main body U2E101, provides the conveying passage for liquid air steam and other materials. Liquid air steam regulating valve FV17123 is installed on the upper tower pipeline 2, and the main function is to regulate the liquid air steam flow out of crude argon tower condenser main body U2E101. By changing the flow of liquid air steam, the heat exchange process in the condenser can be affected, and then the load of the condenser is affected. For example, when the condenser load needs to be increased, liquid air steam regulating valve FV17123 can be opened, so that more liquid air steam enters the condenser, and the heat exchange amount is increased. Conversely, closing the valve reduces the amount of liquid air steam entering, and reduces the condenser load.
[0023] Crude argon tower condenser liquid level LIC171111 and crude argon condenser pressure display control equipment PIC1713 can monitor the working condition of crude argon tower in real time.
[0024] The crude argon flow indicating instrument FY17125 plays a key control and monitoring role, and is connected with the crude argon flow meter FT1712. The crude argon flow meter FT1712 can measure the pressure difference flowing through the flow meter in real time, and convert the pressure difference signal into an electric signal or other transmittable signal form, and feed back to the crude argon flow indicating instrument FY17125. The crude argon flow indicating instrument FY17125 compares and analyzes the received pressure difference signal with the preset flow control range; on the other hand, the crude argon flow indicating instrument FY17125 is connected with the liquid air vapor regulating valve FV17123. When the crude argon flow indicating instrument FY17125 analyzes that the current crude argon flow is lower than the preset value, it sends a control signal to the liquid air vapor regulating valve FV17123 to open it, increases the liquid air vapor outflow, and increases the crude argon column load; when the crude argon flow indicating instrument FY17125 analyzes that the current crude argon flow is higher than the preset value, it sends a control signal to the liquid air vapor regulating valve FV17123 to close it, reduces the liquid air vapor outflow, and reduces the crude argon column load, so as to realize stable control of the pressure of the crude argon column condenser main body U2E101, and indirectly control the load of the condenser in a suitable range.
[0025] In the embodiment, the crude argon column condenser main body U2E101 is connected with the communication pipe 7 on one side, and the liquid air throttling regulating valve LV17118 is arranged on the communication pipe 7. After the oxygen-rich liquid air is supercooled by the condenser E2, it is divided into two parts: one part is throttled and then enters the upper tower as reflux liquid; the other part is throttled by the liquid air throttling regulating valve LV17118 and then is sent to the crude argon column condenser U2E10 to cool the crude argon, so that the crude argon gas is cooled to crude liquid argon, which is used as reflux liquid of the crude argon column U2K10.
[0026] The liquid air throttling regulating valve LV17118 is connected with the liquid air lifting regulating valve HV17219. Since the crude argon column condenser inlet height is about 61 meters, and the working pressure of the crude argon condenser U2E10 is between 60-80 KPa, the liquid flow capacity of the liquid air throttling regulating valve LV17118 is poor, so the liquid air lifting regulating valve HV17219 is added to ensure that the liquid air enters the crude argon condenser smoothly.
[0027] The crude argon condenser pressure display control device PIC17134 and the liquid air steam regulating valve FV17123 are connected and controlled by the distributed control system DCS, the condenser load is controlled by the crude argon flow FY17123 when the crude argon tower is in normal operation, when the crude argon tower is shut down due to nitrogen blockage and other interlocks, the distributed control system DCS quickly switches the condenser load of the crude argon condenser pressure display control device PIC17134, that is, controls the liquid air steam regulating valve FV17123, which changes the traditional liquid level control mode of the crude argon condenser load. On the one hand, the liquid air plate type of the crude argon condenser is fully immersed, which ensures the safe operation of the liquid air plate type, and on the other hand, the fully immersed liquid air plate type load is only affected by the liquid air side pressure, and the flow control is used instead of pressure control to adjust the argon tower working condition to be more stable.
[0028] It should be noted that the liquid air is concentrated and evaporated in the crude argon condenser, which causes the concentration of hydrocarbons in the liquid air, in order to ensure the safe operation of the equipment, the liquid air return tower valve needs to be properly opened. The argon fraction gas is extracted from the middle and lower parts of the upper tower and sent to the crude argon tower U2K10, the argon fraction in the crude argon tower U2K10 is heated and exchanged from bottom to top with the crude liquid argon from the upper part, since the melting and boiling points of oxygen are higher than those of argon (the nitrogen component is ignored), the oxygen component of the ascending gas is more easily liquefied, resulting in a decrease in the oxygen component of the ascending gas and an increase in the argon component, and the crude argon gas containing 1.5 ppm of oxygen can be obtained at the top of the crude argon tower U2K10, and the argon in the crude liquid argon is more easily evaporated, resulting in an increase in the oxygen component in the reflux liquid, and the crude liquid oxygen containing about 90% of oxygen at the bottom of the tower is pressurized by the liquid oxygen pump and sent to the upper tower.
[0029] It should be noted that according to the needs of implementation, each component described in the embodiments of the present application can be split into more components, or two or more components or parts of components can be combined into new components to achieve the purpose of the embodiments of the present application. The above embodiments only express several implementation modes of the present application, and the description is more specific and detailed, but it cannot be understood as a limitation on the scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the present application patent should be subject to the appended claims.
Claims
1. A crude argon column condenser load control apparatus, characterized by: Including the main body of crude argon tower condenser U2E10 (1), the upper end of the crude argon tower condenser main body U2E10 (1) is connected and communicated with the upper tower pipeline (2), the upper tower pipeline (2) is provided with a liquid air vapor regulating valve FV1712 (3), the liquid air vapor regulating valve FV1712 (3) is connected with a crude argon condenser pressure display control device PIC1713 (4) and a crude argon flow indicating instrument FY1712 (5), the crude argon flow indicating instrument FY1712 (5) is connected with a crude argon flow meter FT1712 (10), the crude argon condenser main body U2E10 is provided with a crude argon tower condenser liquid level LIC1711 (11).
2. A crude argon column condenser load control device according to claim 1, characterized in that: The crude argon condenser pressure display control device PIC1713 (4) is connected with a pressure transmitter PT1713 (6).
3. A crude argon column condenser load control device according to claim 1, characterized in that: The crude argon tower condenser main body U2E10 (1) is connected and communicated with a communication pipe (7) on one side, and the communication pipe (7) is provided with a liquid air throttling regulating valve LV1711 (8).
4. A crude argon column condenser load control apparatus according to claim 3, characterized in that: The liquid air throttling regulating valve LV1711 (8) is connected with a liquid air air lifting regulating valve HV1721 (9).
5. A crude argon column condenser load control apparatus as defined in claim 1, wherein: The crude argon condenser pressure display control device PIC1713 (4), the liquid air vapor regulating valve FV1712 (3) and the crude argon flow indicating instrument FY1712 (5) are all connected and controlled through a distributed control system DCS.
6. A crude argon column condenser load control device according to claim 5, characterized in that: The distributed control system DCS switches the condenser load of the crude argon condenser pressure display control device PIC1713 (4) and the crude argon flow indicating instrument FY1712 (5) to control the liquid air vapor regulating valve FV1712 (3).