Vacuum heat pipe type low-temperature economizer intelligent drainage device and use method

Abstract

This invention relates to the field of economizer drainage equipment technology, and discloses an intelligent drainage device and its usage method for a vacuum heat pipe type low-temperature economizer. The drainage device includes a drainage opening on the bottom side of the economizer body and an intelligent drainage component disposed on the drainage opening. A drainage funnel is disposed at the bottom of the drainage opening, and a drainage pipe is disposed at the bottom of the drainage funnel. An electromagnetic valve is disposed on the drainage pipe, and a side control box is disposed on the side of the drainage pipe. The electromagnetic valve and the side control box are connected by a power connection line. A liquid inlet chamber is disposed in the middle of the side control box, with a positive contact point on one side of the inner wall of the liquid inlet chamber and a negative contact point on the other side. This device can automatically trigger drainage, eliminating the need for frequent manual operation, improving drainage efficiency and accuracy, and avoiding the impact on the economizer caused by untimely or excessive drainage.

Description

Technical Field

[0001] This invention relates to the field of economizer drainage equipment technology, specifically to a vacuum heat pipe type low temperature economizer intelligent drainage device and its usage method. Background Technology

[0002] Energy conservation and carbon reduction have become core development directions in the industrial sector, especially in industries that rely on boiler operation, such as coal-fired power plants, chemicals, and metallurgy. Flue gas waste heat recovery and utilization is a key path to improve energy efficiency and reduce pollutant emissions. Low-temperature economizers, as the core equipment for waste heat recovery from tail-end flue gas, can significantly reduce standard coal consumption for power generation by recovering low-temperature waste heat from the 120-180℃ flue gas to heat boiler feedwater or circulating water. A single unit can achieve annual energy savings of thousands of tons of standard coal and tens of thousands of tons of carbon dioxide emission reductions. Its application has become the mainstream choice for energy-saving retrofits in the industry.

[0003] In actual operation, the stable and reliable operation of the drainage system is a key bottleneck restricting the efficiency and safety of vacuum heat pipe type low-temperature economizers. Due to the influence of flue gas composition and heat exchange characteristics, water vapor in the boiler exhaust will condense during the low-temperature heat exchange process, forming SO2 and NO2-containing gases in the boiler exhaust. x Condensation from acidic substances is highly corrosive, and if it is not drained in a timely and effective manner, it can cause a series of operational problems.

[0004] Chinese Patent No. CN223021051U discloses a drainage device for a wide-channel plate-type low-temperature economizer, which relates to the field of economizer technology. The device includes a water collection tank located at the bottom of the economizer. Several water inlet components are fixedly connected and communicated to the top surface of the water collection tank. Each water inlet component is correspondingly and communicated with a heat exchange plate. A drain pipe is fixedly connected and communicated to the center of the bottom of the water collection tank, and a first control valve is installed on the drain pipe. The water collection tank of this device is connected to the bottom of the heat exchange plates through the water inlet components. When the economizer is stopped, opening the first control valve allows water to be drained from all the heat exchange plates in the economizer, enabling the economizer to drain water from the heat exchange plate cavities during shutdown. However, the economizer drainage device in the aforementioned patent still has certain shortcomings. Because existing vacuum heat pipe type low-temperature economizers mostly rely on level sensors to detect the liquid level during actual drainage, and then send feedback to the control computer to open and close the valves on the drain pipe, the economizer condensate contains a certain amount of SO2 and NO. x Acidic substances can cause significant corrosion to the sensors, greatly reducing their service life and causing frequent malfunctions. This makes it difficult to ensure accurate valve opening and closing, and can lead to untimely drainage, thus jeopardizing the safe use of the economizer. Summary of the Invention

[0005] To address existing problems, this invention provides an intelligent drainage device and method for a vacuum heat pipe type low-temperature economizer. Through a sophisticated and reliable design, drainage is automatically triggered by the principle of level water in communicating vessels, eliminating the need for frequent manual operation. This improves drainage efficiency and accuracy, effectively avoids the impact of untimely or excessive drainage on the economizer, ensures the normal operation of the economizer, and extends its service life.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] This invention provides an intelligent drainage device for a vacuum heat pipe type low-temperature economizer, comprising a drainage opening on the bottom side of the economizer body and an intelligent drainage component disposed on the drainage opening; the intelligent drainage component includes a drainage funnel, a drainage pipe, an electromagnetic valve, a side control box, a liquid inlet chamber, a positive electrode contact point, a negative electrode contact point, a liquid inlet, and a liquid inlet pipe; the drainage funnel is disposed at the bottom of the drainage opening, and a drainage pipe is disposed at the bottom of the drainage funnel; an electromagnetic valve is disposed on the drainage pipe; a side control box is disposed on the side of the drainage pipe; the electromagnetic valve and the side control box are connected by a power connection line; a liquid inlet chamber is disposed in the middle of the side control box; a positive electrode contact point is disposed on one side of the inner wall of the liquid inlet chamber; a negative electrode contact point is disposed on the other side of the inner wall of the liquid inlet chamber; a liquid inlet is disposed at the bottom of the liquid inlet chamber; a liquid inlet pipe is connected to the bottom of the liquid inlet; the other end of the liquid inlet pipe is connected to the bottom of the drainage funnel.

[0008] As a further improvement of the present invention, it also includes a battery mounting compartment and a battery pack; two battery mounting compartments are symmetrically opened at the top of the side control box, and each battery mounting compartment is provided with a battery pack.

[0009] As a further improvement of the present invention, a top cover is provided at the top of the side control box.

[0010] As a further improvement of the present invention, both the positive electrode contact point and the negative electrode contact point are connected to the battery pack via connecting lines.

[0011] As a further improvement of the present invention, two protrusions are symmetrically arranged on the bottom side of the top cover plate.

[0012] As a further improvement of the present invention, the drainage funnel is made of ceramic, polypropylene or polytetrafluoroethylene.

[0013] As a further improvement of the present invention, the side control box and the liquid inlet pipe are disposed near the bottom of the drain funnel.

[0014] As a further improvement of the present invention, the side of the side control box is connected to the drainage funnel by two symmetrically arranged fixed connecting rods.

[0015] As a further improvement of the present invention, the inlet pipe is provided with a switch valve.

[0016] This invention also provides a method for using a smart drainage device for a vacuum heat pipe type low-temperature economizer, comprising the following steps: The liquid inside the economizer body flows into the inlet chamber through the inlet pipe. When the liquid in the inlet chamber reaches a certain level, the liquid simultaneously contacts the positive electrode contact point and the negative electrode contact point, forming a conductive path. The conductive path transmits the signal to the solenoid valve connected to the side control box via a power connection line. When the solenoid valve is energized, it opens, and the liquid in the economizer body is discharged sequentially through the drain opening and the drain pipe. When the liquid level in the inlet chamber drops to the point where the liquid no longer simultaneously contacts the positive and negative contact points, the conductive path is disconnected, the solenoid valve is de-energized and closes, and drainage stops.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This device achieves intelligent drainage of the economizer by setting a drainage opening and intelligent drainage components at the bottom of the economizer body. The electromagnetic valve in the intelligent drainage components can automatically control the opening and closing of the drainage pipe according to the liquid level in the inlet chamber, eliminating the need for frequent manual operation, improving drainage efficiency and accuracy, effectively avoiding the impact of untimely or excessive drainage on the economizer, ensuring the normal operation of the economizer, and extending its service life. The drainage funnel installed at the bottom of the drainage opening can expand the area of ​​the drainage opening, allowing the liquid in the economizer body to flow more smoothly into the drainage pipe, reducing the resistance of the liquid during the drainage process. At the same time, the drainage funnel can also play a certain buffering role, preventing the liquid from directly impacting the drainage pipe and protecting the drainage pipe. Moreover, the internal volume of the drainage funnel increases with the rise of the liquid level, allowing a certain amount of condensate to be stored before triggering drainage, increasing the amount of water drained each time and creating a force effect. This device solves the technical problem of existing vacuum heat pipe low-temperature economizers where acidic water causes significant corrosion to the liquid level sensor during actual drainage, reducing the timeliness and accuracy of drainage and endangering the safe operation of the economizer.

[0018] Preferably, battery mounting compartments and battery packs are symmetrically located at the top of the side control box, providing a stable and reliable power supply for the intelligent drainage component. The symmetrical arrangement of two battery mounting compartments and battery packs increases the power supply's endurance, ensuring the intelligent drainage component can continue to operate normally during extended periods, thus improving the overall reliability and stability of the device.

[0019] Preferably, a top cover is provided at the top of the side control box, which can protect the battery installation compartment and battery pack, prevent dust, moisture and other contaminants from entering the battery installation compartment, avoid damage to the battery pack from the external environment, extend the service life of the battery pack, and at the same time ensure the stability of the power supply to the intelligent drainage component.

[0020] Preferably, the positive and negative contact points are connected to the battery pack via connecting wires to form a complete power supply circuit. This allows the signal to be transmitted to the solenoid valve in a timely manner when the liquid in the inlet chamber contacts the positive and negative electrodes to form a conductive path, ensuring that the intelligent drainage function can be realized accurately and quickly, thus improving the response speed and control accuracy of the device.

[0021] Preferably, two protrusions are symmetrically arranged on the bottom side of the top cover. When installing the top cover, the protrusions can play a positioning and guiding role, so that the top cover can be accurately and quickly installed on the top of the side control box, improving installation efficiency and ensuring the firmness and stability of the top cover installation. At the same time, it further compresses the space of the battery installation compartment and prevents dust, moisture and other substances from entering the battery installation compartment.

[0022] Preferably, the drain funnel is made of ceramic, polypropylene, or polytetrafluoroethylene, materials that possess properties such as high temperature resistance, corrosion resistance, and high mechanical strength. If the drain funnel uses similar materials or structures, it can accommodate the SO2 and NO content generated by boiler flue gas. x Condensation of acidic substances reduces the risk of funnel breakage or deformation, extends service life, and lowers maintenance costs.

[0023] Preferably, the side control box and the inlet pipe are located near the bottom of the drain funnel, ensuring that the inlet pipe can smoothly introduce the liquid in the drain funnel into the inlet chamber. Utilizing the principle of communicating vessels, the liquid flow is made smoother, avoiding problems of poor liquid flow or accumulation caused by height differences, and improving the working efficiency and reliability of the intelligent drainage component.

[0024] Preferably, by setting two symmetrical fixed connecting rods on the side of the side control box and connecting them to the drainage funnel, the connection strength and stability between the side control box and the drainage funnel are enhanced, making the entire intelligent drainage assembly more robust and reliable during operation, reducing the problem of loosening or damage to the connection caused by vibration or external force, and extending the service life of the device.

[0025] Preferably, a switch valve is installed on the inlet pipe, which increases the operational flexibility of the device. When it is necessary to inspect or maintain the intelligent drainage component or perform other special operations, the liquid flow in the inlet pipe can be cut off by closing the switch valve, preventing liquid from continuing to enter the inlet chamber and affecting operation. It also facilitates the cleaning and maintenance of the inlet pipe and related components, improving the maintainability of the device.

[0026] This method automatically controls the opening and closing of the solenoid valve by changing the liquid level in the inlet chamber, achieving intelligent drainage of the economizer. When the liquid level in the inlet chamber reaches a certain level, the solenoid valve opens to drain the water; when the liquid level drops, the solenoid valve closes to stop drainage. This automatic control method can accurately perform drainage operations based on the actual liquid conditions in the economizer, avoiding errors and delays caused by manual operation, improving drainage efficiency and the operational stability of the economizer, while reducing energy waste and labor costs. Attached Figure Description

[0027] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely schematic to aid in understanding the invention and are not intended to specifically limit the shapes and proportions of the components. In the drawings: Figure 1 This is a three-dimensional structural schematic diagram of an intelligent drainage device for a vacuum heat pipe type low-temperature economizer in Example 1; Figure 2 This is a schematic diagram of the intelligent drainage component in Example 1; Figure 3 This is a cross-sectional view of the side control box in Example 1; Figure 4 This is a flowchart illustrating the steps of using a vacuum heat pipe type low-temperature economizer intelligent drainage device in Example 3.

[0028] The components include: 1. Economizer body; 2. Drainage opening; 3. Intelligent drainage assembly; 301. Drainage funnel; 302. Drainage pipe; 303. Solenoid valve; 304. Side control box; 305. Battery installation compartment; 306. Battery pack; 307. Liquid inlet chamber; 308. Positive contact point; 309. Negative contact point; 310. Liquid inlet; 311. Liquid inlet pipe; 312. Switch valve; 313. Fixed connecting rod; 314. Top cover plate; 315. Power connection wire. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0030] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] Example 1 like Figure 1 and Figure 2 As shown, a smart drainage device for a vacuum heat pipe type low-temperature economizer includes a drainage opening 2 on the bottom side of the end of the economizer body 1 and a smart drainage component 3 disposed on the drainage opening 2.

[0033] The intelligent drainage component 3 includes a drainage funnel 301, a drainage pipe 302, a solenoid valve 303, a side control box 304, a battery mounting compartment 305, a battery pack 306, a liquid inlet chamber 307, a positive contact point 308, a negative contact point 309, a liquid inlet 310, and a liquid inlet pipe 311. The drainage funnel 301 is located at the bottom of the drainage opening 2, and the drainage pipe 302 is located at the bottom of the drainage funnel 301. The solenoid valve 303 is installed on the drainage pipe 302, and a side control box 304 is located on the side of the drainage funnel 301. Box 304, solenoid valve 303 and side control box 304 are connected by a power connection line 315; the side control box 304 is provided with a liquid inlet chamber 307 in the middle, a positive contact point 308 is provided on one side of the inner wall of the liquid inlet chamber 307, a negative contact point 309 is provided on the other side of the inner wall of the liquid inlet chamber 307, a liquid inlet 310 is provided at the bottom of the liquid inlet chamber 307, the bottom of the liquid inlet 310 is connected to a liquid inlet pipe 311, and the other end of the liquid inlet pipe 311 is connected to the bottom of the drain funnel 301.

[0034] Two battery mounting compartments 305 are symmetrically provided at the top of the side control box 304, and each battery mounting compartment 305 is equipped with a battery pack 306. The symmetrical arrangement of the two battery mounting compartments 305 is beneficial to the weight balance of the entire drainage device, so that the center line between the positive electrode contact point 308 and the negative electrode contact point 309 remains horizontal, which is conducive to the connection of the positive electrode contact point 308 and the negative electrode contact point 309 when the liquid level rises.

[0035] The top of the side control box 304 is provided with a top cover 314.

[0036] Both the positive terminal contact 308 and the negative terminal contact 309 are connected to the battery pack 306 via connecting wires.

[0037] Preferably, two protrusions are symmetrically arranged on the bottom side of the top cover plate 314. The protrusions provide stable contact with the top side of the battery pack 306 placed in the battery mounting compartment 305. The symmetrical arrangement of the protrusions is beneficial to the weight balance of the entire drainage device, ensuring that the center line connecting the positive electrode contact point 308 and the negative electrode contact point 309 remains horizontal, which is conducive to the connection of the positive electrode contact point 308 and the negative electrode contact point 309 when the liquid level rises.

[0038] Optionally, the side control box 304 and the inlet pipe 311 are located near the bottom of the drain funnel 301.

[0039] The side of the side control box 304 is connected to the drainage funnel 301 by two symmetrically arranged fixed connecting rods 313.

[0040] Optionally, a switch valve 312 is provided on the inlet pipe 311.

[0041] This embodiment also provides a method for using a smart drainage device for a vacuum heat pipe type low-temperature economizer, including the following steps: The liquid inside the economizer body 1 flows into the liquid inlet chamber 307 through the liquid inlet pipe 311. When the liquid in the liquid inlet chamber 307 reaches a certain level, the liquid simultaneously contacts the positive electrode contact point 308 and the negative electrode contact point 309, forming a conductive path. The conductive path transmits the signal to the solenoid valve 303, which is connected to the side control box 304 via the power connection line 315. When the solenoid valve 303 is energized, it opens, and the liquid in the economizer body 1 is discharged sequentially through the drain opening 2 and the drain pipe 302. When the liquid level in the liquid inlet chamber 307 drops to the point where the liquid no longer simultaneously contacts the positive contact point 308 and the negative contact point 309, the conductive path is disconnected, the solenoid valve 303 is de-energized and closes, and the drainage stops.

[0042] This method automatically controls the opening and closing of the solenoid valve by changing the liquid level in the inlet chamber, achieving intelligent drainage of the economizer. When the liquid level in the inlet chamber reaches a certain level, the solenoid valve opens to drain the water; when the liquid level drops, the solenoid valve closes to stop drainage. This automatic control method can accurately perform drainage operations based on the actual liquid conditions in the economizer, avoiding errors and delays caused by manual operation, improving drainage efficiency and the operational stability of the economizer, while reducing energy waste and labor costs.

[0043] In this specific implementation, the solenoid valve 303 used is an existing product, such as the XYSL model from Shanghai Xinyi, specifically a corrosion-resistant solenoid valve made of CPVC material. A drain opening 2 is provided on the bottom side of the economizer body 1, and an intelligent drainage component 3 is installed on the drain opening 2. When water accumulates at the end of the economizer body 1, the water enters the drain funnel 301 in the intelligent drainage component 3 through the drain opening 2. At this time, the solenoid valve 303 located on the drain pipe 302 is in a de-energized and closed state. When the liquid level at the bottom of the drain funnel 301 rises, the inlet pipe 311 is connected to the bottom of the drain funnel 301, thereby causing the water to drain. Liquid at the bottom of hopper 301 enters the inlet chamber 307 in the side control box 304 through inlet pipe 311. When the liquid level rises to the height of positive contact point 308 and negative contact point 309, positive contact point 308 and negative contact point 309 are energized under the connection of the liquid, so that battery pack 306 can energize and open solenoid valve 303 through power connection wire 315, thereby timely and effectively draining the accumulated liquid in drainage hopper 301 through drainage pipe 302, ensuring that there is not much water inside the economizer body 1, and also avoiding the problem of frequent damage to liquid level sensor in traditional methods, which can effectively save costs and timely and effectively drain accumulated water.

[0044] Example 2 The difference between this embodiment and Embodiment 1 is that: 1) Positive contact point 308 and negative contact point 309 are electrically connected to the positive and negative terminals of the external power supply, respectively.

[0045] 2) The drainage funnel 301 is made of ceramic, polypropylene or polytetrafluoroethylene.

[0046] This embodiment omits the drainage funnel 301, battery installation compartment 305, and battery pack 306 compared to embodiment 1.

[0047] Materials such as ceramic, polypropylene, or polytetrafluoroethylene possess properties such as high temperature resistance, corrosion resistance, and high mechanical strength. If the drainage funnel uses similar materials or structures, it can accommodate condensate containing acidic substances such as SO2 and NOx generated from boiler flue gas, reducing the risk of funnel breakage or deformation, extending its service life, and lowering maintenance costs.

[0048] Example 3 like Figure 4 As shown, compared with Example 1, the method of using the intelligent drainage device for a vacuum heat pipe type low-temperature economizer provided in this embodiment further includes: In case of inspection, maintenance or special circumstances, the switch valve 312 installed on the inlet pipe 311 can be manually operated to control the opening and closing of the inlet pipe 311, thereby intervening in the drainage process.

[0049] The above embodiments are merely one of the implementation methods for achieving the technical solution of the present invention. The scope of protection claimed by the present invention is not limited to this embodiment, but also includes any variations, substitutions and other implementation methods that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention.

Claims

1. A smart drainage device for a vacuum heat pipe type low-temperature economizer, characterized in that, It includes a drainage opening (2) on the bottom side of the end of the economizer body (1) and an intelligent drainage component (3) installed on the drainage opening (2). The intelligent drainage component (3) includes a drainage funnel (301), a drainage pipe (302), a solenoid valve (303), a side control box (304), an inlet chamber (307), a positive contact point (308), a negative contact point (309), an inlet port (310), and an inlet pipe (311); the drainage funnel (301) is located at the bottom of the drainage opening (2), and a drainage pipe (302) is located at the bottom of the drainage funnel (301). A solenoid valve (303) is located on the drainage pipe (302), and a side control box (304) is located on the side of the drainage pipe (302). The electromagnetic valve (303) is connected to the side control box (304) by a power connection line (315); the side control box (304) has a liquid inlet chamber (307) in the middle, a positive contact point (308) is provided on one side of the inner wall of the liquid inlet chamber (307), a negative contact point (309) is provided on the other side of the inner wall of the liquid inlet chamber (307), a liquid inlet (310) is provided at the bottom of the liquid inlet chamber (307), a liquid inlet pipe (311) is connected to the bottom of the liquid inlet (310), and the other end of the liquid inlet pipe (311) is connected to the bottom of the drain funnel (301).

2. The intelligent drainage device for a vacuum heat pipe type low-temperature economizer according to claim 1, characterized in that, It also includes a battery installation compartment (305) and a battery pack (306); the top of the side control box (304) has two symmetrically opened battery installation compartments (305), and each battery installation compartment (305) is provided with a battery pack (306).

3. The intelligent drainage device for a vacuum heat pipe type low-temperature economizer according to claim 2, characterized in that, The top of the side control box (304) is provided with a top cover plate (314).

4. The intelligent drainage device for a vacuum heat pipe type low-temperature economizer according to claim 2, characterized in that, Both the positive electrode contact point (308) and the negative electrode contact point (309) are connected to the battery pack (306) via connecting lines.

5. The intelligent drainage device for a vacuum heat pipe type low-temperature economizer according to claim 3, characterized in that, The top cover plate (314) has two symmetrical protrusions on its bottom side.

6. The intelligent drainage device for a vacuum heat pipe type low-temperature economizer according to claim 1, characterized in that, The drainage funnel (301) is made of ceramic, polypropylene or polytetrafluoroethylene.

7. The intelligent drainage device for a vacuum heat pipe type low-temperature economizer according to claim 6, characterized in that, The side control box (304) and the liquid inlet pipe (311) are located near the bottom of the drain funnel (301).

8. The intelligent drainage device for a vacuum heat pipe type low-temperature economizer according to claim 6, characterized in that, The side of the side control box (304) is connected to the drainage funnel (301) by two symmetrically arranged fixed connecting rods (313).

9. The intelligent drainage device for a vacuum heat pipe type low-temperature economizer according to claim 1, characterized in that, A switch valve (312) is provided on the liquid inlet pipe (311).

10. The method of using the drainage device of the intelligent drainage device for a vacuum heat pipe type low-temperature economizer as described in any one of claims 1 to 9, characterized in that, Includes the following steps: Liquid in the economizer body (1) flows into the inlet chamber (307) through the inlet pipe (311). When the liquid in the inlet chamber (307) reaches a certain level, the liquid simultaneously contacts the positive contact point (308) and the negative contact point (309), forming a conductive path. The conductive path transmits the signal to the solenoid valve (303) connected to the side control box (304) through the power connection line (315). The solenoid valve (303) is energized and opens, and the liquid in the economizer body (1) is discharged through the drain opening (2) and the drain pipe (302) in sequence. When the liquid level in the inlet chamber (307) drops to the point where the liquid no longer simultaneously contacts the positive contact point (308) and the negative contact point (309), the conductive path is disconnected, the solenoid valve (303) is de-energized and closes, and drainage stops.

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