High vacuum electro-chemical deaerator

Abstract

The utility model discloses high vacuum electrochemistry chemical deaerator relates to the technical field of deaerator, solves the technical problem that the existing technical scheme has relatively poor deoxygenation effect, and the water supply quality is relatively low, including deaerator, electrolytic device, water jet ejector and water pump group, the water inlet of deaerator is provided with the water inlet pipe, the water outlet of deaerator is linked with water jet ejector water inlet, the working water inlet of water jet ejector is connected with the backwater pipe, the water outlet of water jet ejector is linked with the inlet of water pump group, and water pump group is composed of submersible pump and outer cylinder, the utility model discloses the innovative combination of water jet ejector and negative pressure conversion pump, solves the problem that the water pump cannot normally suck water under high vacuum state, leads to the water supply interruption, makes equipment can be stable operation under high vacuum condition, need not frequent adjustment vacuum degree, effectively guarantees the thoroughness of vacuum deoxygenation to improve deoxygenation efficiency greatly.

Description

Technical Field

[0001] This utility model relates to the field of deaerator technology, specifically a high-vacuum electrochemical deaerator. Background Technology

[0002] This utility model relates to the technical field of deaerators, which are devices used to remove dissolved oxygen from boiler feedwater and are widely used in boiler systems in industries such as power, metallurgy, and chemical engineering. Its main function is to remove dissolved oxygen from water using physical or chemical methods, preventing oxygen from reacting with metal pipes, boiler bodies, and other equipment under high temperature and pressure conditions, thus extending the service life of the boiler and related equipment and ensuring the safe and stable operation of the system. Deaerators can also reduce equipment maintenance and replacement costs caused by oxygen corrosion, improving the economy and reliability of boiler operation.

[0003] Commonly used boiler deoxygenation equipment mainly includes chemical deaerators, vacuum deaerators, sponge iron deaerators, vacuum electrochemical three-in-one deaerators, and analytical deaerators. Vacuum electrochemical three-in-one deaerators are widely used due to their high deoxygenation efficiency. This equipment achieves efficient deoxygenation at room temperature through the triple action of vacuum deoxygenation, electrochemical reaction, and reducing agent. However, with increasing demands for boiler water quality and more in-depth operational experience, existing technologies have gradually revealed some insurmountable problems in practical applications.

[0004] Existing vacuum electrochemical three-in-one deaerators have the following main drawbacks: First, the priming pump cannot draw water normally under high vacuum, leading to water supply interruption. This necessitates lowering the vacuum level, which affects deoxygenation efficiency and increases the burden on subsequent electrochemical deoxygenation. Second, increasing electrolysis energy to ensure deoxygenation results in excessive levels of ferrous (Fe2+) and ferric (Fe3+) ions in the water, impacting water quality. Finally, frequent vacuum adjustments are required during operation, leading to unstable deoxygenation, complex management, and high energy and material consumption. Therefore, achieving stable high-vacuum operation, reducing energy consumption, simplifying management, and ensuring water quality compliance are key directions for deaerator technology improvement.

[0005] Existing technical solutions suffer from several problems: the priming pump cannot draw water normally under high vacuum, leading to water supply interruption; the pump can only operate at a lower vacuum level, affecting the deoxygenation effect; the electrolysis stage consumes a lot of energy, which can easily lead to excessive iron ions in the water, affecting the quality of the water supply; the vacuum level needs to be adjusted frequently, the deoxygenation effect is unstable, and the operation and management are complex. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a high-vacuum electrochemical deaerator, which solves the problems of existing technical solutions, such as the inability of the priming pump to draw water normally under high vacuum, leading to water supply interruption, requiring operation at reduced vacuum levels and affecting deaeration effect; high energy consumption during the electrolysis stage, which can easily lead to excessive iron ions in the water and affect water quality; the need for frequent vacuum adjustments, resulting in unstable deaeration effect and complex operation and management.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a high-vacuum electrochemical deaerator, comprising a deaerator tank, an electrolysis device, a water jet ejector, and a priming pump assembly. This structure, by combining the deaerator tank with the water jet ejector and priming pump, achieves efficient deoxygenation of boiler feedwater under high vacuum conditions, ensuring the equipment can continuously and stably output qualified deoxygenated water with low oxygen content. The deaerator tank inlet is equipped with an inlet pipe that provides deaerator water to the deaerator tank, ensuring continuous water intake and meeting the continuous water supply needs of industrial production. The deaerator tank outlet is connected to the water jet ejector priming port. By connecting the outlet to the water jet ejector priming port, the strong suction capability of the water jet ejector under high vacuum conditions is utilized to efficiently extract water from the deaerator tank, overcoming the limitations of traditional priming pumps under high vacuum conditions. To address the water issue, the working water inlet of the water jet ejector is connected to a return water pipe. This return water pipe provides the water jet ejector with a high-speed jet of working water, creating a high-vacuum environment inside the ejector. This enhances the water extraction capacity from the deaerator tank and optimizes the utilization efficiency of the return water. The outlet of the water jet ejector is connected to the inlet of the priming pump. This connection allows the priming pump to smoothly pump water under a slightly positive pressure, preventing water supply interruptions caused by high negative pressure. The priming pump consists of a submersible pump and an outer cylinder. The high-speed jet of water in the return water pipe creates a high-vacuum state at the water jet ejector's inlet, effectively improving the water extraction efficiency from the deaerator tank. The slightly positive pressure at the priming pump inlet ensures normal pump operation. The outlet pipe enables the smooth output of deaerated water. The priming pump outlet is equipped with an outlet pipe.

[0008] Preferably, a vacuum pump is connected to the upper end of the deaerator, and a gas-liquid separator is provided at the output end of the vacuum pump; the vacuum pump continuously evacuates the deaerator, and the gas-liquid separator separates the water and gas mixed in during the evacuation process.

[0009] Preferably, the inlet pipe is connected to a deaerator, and the deaerator is in a vacuum state so that the inlet water can be initially deaerated at the top of the deaerator.

[0010] Preferably, the deoxygenation tank is equipped with an electrolysis device; the electrolysis device is used to perform secondary electrolysis to deoxygenate the water that has undergone preliminary deoxygenation as it falls from the deoxygenation tank, thereby further reducing the oxygen content in the water.

[0011] Preferably, a water jet ejector is connected to the bottom of the deaerator; the water outlet of the water jet ejector is connected to the priming pump, and a return pipe is provided at the outlet of the priming pump. The high-pressure water in the return pipe serves as the working water source for the water jet ejector. The high vacuum formed by the water jet ejector is used to draw the deaerated water in the deaerator tank and supply water to the priming pump under a slightly positive pressure.

[0012] Preferably, a sampling valve is installed on the water outlet pipe; the sampling valve facilitates the detection of oxygen content in the deoxygenated water at any time, ensuring that the water supply quality meets the standards, and facilitating equipment operation status monitoring and water quality management.

[0013] Preferably, an electrical control box is installed inside the deaerator. The electrical control box provides electrical control for the deaerator's power equipment and instruments, improving the convenience and safety of operation and management, and ensuring the coordinated and efficient operation of all components.

[0014] Beneficial effects

[0015] This invention provides a high-vacuum electrochemical deaerator. Through an innovative combination of a water jet injector and a priming pump set, it solves the problem of priming pumps failing to draw water properly under high vacuum conditions, leading to water supply interruptions. This allows the equipment to operate stably under high vacuum conditions without frequent vacuum adjustments, effectively ensuring thorough vacuum deoxygenation and significantly improving deoxygenation efficiency. By fully utilizing the high-vacuum deoxygenation capability, it reduces reliance on the electrochemical deoxygenation stage, significantly lowering energy consumption and electrode plate consumption. Simultaneously, it reduces iron ion precipitation caused by high electrolysis current, preventing excessive iron ion levels in the water, ensuring water quality, and helping to extend the service life of the boiler and deaerator. This solution eliminates the vacuum breaker valve and adopts an automated electrical control system, making operation simpler and more stable. By setting up sampling valves and automatic instruments for water level and vacuum, it facilitates real-time monitoring of water quality and equipment status, ensuring a long-term supply of qualified deoxygenated water to meet the high-quality boiler water requirements of industries such as power, metallurgy, and chemicals. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the high-vacuum electrochemical deaerator described in this utility model.

[0017] In the diagram: 1. Electrical control box; 2. Deaerator; 3. Water jet injector; 4. Vacuum pump; 5. Gas-liquid separator; 6. Submersible pump; 7. Priming pump; 8. Sampling valve; 9. Outer cylinder; 10. Inlet pipe; 11. Return water pipe; 12. Outlet pipe; 13. Electrolysis unit Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Detailed description follows.

[0019] Please see Figure 1 This utility model provides a technical solution: a high-vacuum electrochemical deaerator, including a deaerator tank, an electrolysis device, a water jet ejector, and a priming pump group. This structure, by combining the deaerator tank with the electrolysis device, water jet ejector, and priming pump group, achieves efficient deoxygenation of boiler feedwater under high vacuum conditions, ensuring the equipment can continuously and stably output qualified deoxygenated water with low oxygen content. The deaerator tank inlet is equipped with an inlet pipe, which provides the deaerator with water to be deoxygenated, ensuring continuous water intake and meeting the continuous water supply needs of industrial production. An electrolysis device is installed at the bottom of the deaerator tank, allowing water that has undergone preliminary sampling from the top of the tank to fall into the electrolysis device for electrolytic deoxygenation, completing secondary deoxygenation. The outlet at the bottom of the deaerator tank is connected to the priming port of the water jet ejector. By connecting the outlet to the priming port, the strong current of the water jet ejector under high vacuum conditions is utilized... The water jet ejector has a high suction capacity, enabling efficient extraction of water from the deaerator tank and overcoming the problem of traditional priming pumps being unable to draw water under high vacuum. The working water inlet of the ejector is connected to a return water pipe, which provides a high-speed jet of working water to the ejector, creating a high-vacuum environment inside the ejector. This enhances the water extraction capacity from the deaerator tank and optimizes the utilization efficiency of the return water. The outlet of the ejector is connected to the inlet of the priming pump, allowing the priming pump to smoothly draw water under a slightly positive pressure, avoiding water supply interruptions caused by excessively high negative pressure. The priming pump consists of a submersible pump and an outer cylinder. The high-speed jet of water in the return water pipe creates a high-vacuum state at the ejector's inlet, effectively improving the water extraction efficiency from the deaerator tank. The priming pump inlet is under slightly positive pressure, ensuring normal pump operation and smooth output of deaerated water. The priming pump outlet is equipped with an outlet pipe.

[0020] In this embodiment, the upper end of the deaerator is connected to a vacuum pump, and the output end of the vacuum pump is equipped with a gas-water separator; the vacuum pump continuously evacuates the deaerator, and the gas-water separator separates the water and gas mixed in during the evacuation process.

[0021] In this embodiment, an electrolysis device is further provided at the bottom of the deoxygenation tank; the water that has been initially deoxygenated in the upper part of the deoxygenation tank is subjected to electrolytic deoxygenation and chemical deoxygenation to ensure the thoroughness of deoxygenation.

[0022] In this embodiment, a sampling valve is further provided on the water outlet pipe; the sampling valve facilitates the detection of oxygen content in the deoxygenated water at any time, ensuring that the water supply quality meets the standards, and facilitating equipment operation status monitoring and water quality management.

[0023] In this embodiment, an electrical control box is further provided inside the deaerator. The electrical control box provides electrical control for the deaerator's power equipment and instruments, improving the convenience and safety of operation and management, and ensuring the coordinated and efficient operation of all components.

[0024] Its detailed connection methods are well-known technologies in this field; such as Figure 1 As shown, the water to be deoxygenated first enters the deoxygenation tank through the inlet pipe. Inside the deoxygenation tank, the water comes into full contact with the high vacuum environment, achieving initial vacuum deoxygenation. The water undergoes electrolytic deoxygenation at the bottom of the deoxygenation tank. Due to the reducing properties of the ferrous ions generated by electrolysis, the ferrous ions then react with oxygen to form ferric ions, undergoing chemical deoxygenation. The water effluent from the deoxygenation tank enters the water jet ejector through the outlet. The water jet ejector uses high-speed jetting of return water to create a high vacuum state inside, effectively enhancing the water intake capacity, drawing the water out of the deoxygenation tank and mixing it with the return water.

[0025] The mixed water flows into the priming pump. The priming pump consists of a submersible pump and an outer cylinder. The mixed water creates a slightly positive pressure environment within the outer cylinder, enabling the submersible pump to smoothly extract the water and deliver it to subsequent systems, completely solving the problem of the priming pump failing to draw water properly under high vacuum. During deoxygenation, the high vacuum effect of the water jet ejector continuously counteracts the vacuum level within the deoxygenation tank, eliminating the need for a vacuum breaker valve and ensuring the stability and high efficiency of the deoxygenation process.

[0026] The system is also equipped with a vacuum pump to continuously provide vacuuming service to the deoxygenated tank, while a gas-water separator separates the water and gas entrained during the vacuuming process, protecting the vacuum pump and the system. A sampling valve is installed on the outlet pipe for real-time monitoring of the oxygen content of the deoxygenated water, ensuring that the water quality meets standards. The unit is equipped with an electrical control box, enabling centralized control and automated management of the power equipment and instruments, improving the convenience and reliability of equipment operation.

[0027] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0028] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A high-vacuum electrochemical deaerator, comprising a deaerator tank, an electrolysis unit, a water jet injector, and a priming pump assembly, characterized in that, The deaerator tank inlet is equipped with an inlet pipe, the deaerator tank outlet is connected to the water jet injector inlet, the water jet injector working water inlet is connected to a return water pipe, the water jet injector outlet is connected to the inlet of the priming pump group, the priming pump group consists of a submersible pump and an outer cylinder, the return water pipe contains a high-speed jet of water, which makes the water jet injector inlet a high vacuum state, the priming pump group inlet is a slightly positive pressure state, and the priming pump group outlet is equipped with an outlet pipe.

2. The high-vacuum electrochemical deaerator according to claim 1, characterized in that... The deaerator is connected to a vacuum pump at its upper end, and a gas-water separator is installed at the output end of the vacuum pump.

3. The high-vacuum electrochemical deaerator according to claim 1, characterized in that... An electrolysis device is installed inside the deoxygenation tank.

4. The high-vacuum electrochemical deaerator according to claim 1, characterized in that... An electrical control box is installed outside the deaerator tank, which provides electrical control for the deaerator's power equipment and instruments.

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