Liquid oxygen-enriched water preparation and oxygenation device

Abstract

The utility model belongs to the technical field of water supply and oxygenation, and particularly relates to a liquid oxygen-enriched water preparation and oxygenation device which comprises a constant-pressure oxygen tank, a gas booster pump, a porous gas nozzle, an oxygen-enriched water storage tank, an atomizer and a metering pump. The constant-pressure oxygen tank is sequentially connected with a gas booster pump and a porous gas nozzle through pipelines, the porous gas nozzle is arranged at the bottom in the oxygen-enriched water storage tank, an atomizer is arranged on the upper portion in the oxygen-enriched water storage tank and connected with a demineralized water pipeline, and demineralized water is sprayed into the oxygen-enriched water storage tank through the atomizer; the bottom of the oxygen-enriched water storage tank is connected with a metering pump inlet through a pipeline, and a metering pump outlet is connected with a user pipeline. The device adopts the combination of the porous gas nozzle, the atomizer and the circulating pump, ensures that liquid water can be in full contact with oxygen, and ensures that oxygen is fully and uniformly dissolved in oxygen-enriched water in the oxygen-enriched water storage tank through multiple times of circulation of the circulating pump.

Description

Technical Field

[0001] This utility model belongs to the field of water oxygenation technology, specifically relating to a liquid oxygen-enriched water preparation and oxygenation device. Background Technology

[0002] As one of the advanced water treatment processes for DC units, oxygenation of feedwater can form a dense oxide film on the inner wall of the pipeline in the thermal system, slowing down the rate of corrosion caused by flow, effectively reducing the rate of corrosion and scaling of thermal equipment, and extending the fine treatment operation cycle, thus having good economic benefits.

[0003] In water supply oxygenation, pure oxygen, air, and oxygen-enriched water are commonly used as the oxygenation medium. Under conditions of fluctuating thermal system pressure, gaseous oxygenation (such as pure oxygen or air) compresses the gas within the oxygenation pipeline, causing fluctuations in the gas injection volume. This makes precise control of the oxygenation amount difficult, resulting in unstable control of the water supply oxygenation and potentially leading to excessive oxygen content. Liquid oxygen-enriched water, on the other hand, is incompressible. When system pressure fluctuations cause changes in the pressure at the oxygenation point, the oxygenation rate is relatively stable due to its near incompressibility. Its stability is higher than that of gaseous oxygenation, making liquid oxygenation an increasingly preferred technical approach.

[0004] In the process of liquid oxygenation, the preparation of liquid oxygen-enriched water is a crucial step. According to Dalton's law of partial pressures and Henry's law, the dissolved oxygen content in water is directly proportional to the partial pressure of oxygen at the water surface. Therefore, the most critical requirement in preparing oxygen-enriched water is to ensure a stable oxygen content. Currently, the oxygen source for liquid oxygenation is generally pure oxygen supplied from high-pressure oxygen cylinders or compressed air. High-pressure oxygen cylinders typically operate at pressures above 10 MPa, making it relatively easy to prepare high-oxygen-content oxygen-enriched water. However, this requires regular cylinder replacement; furthermore, the internal pressure of the cylinders gradually decreases during use, causing fluctuations and a decline in the oxygen content of the enriched water, which is not conducive to precise control of the oxygen content in the feed water.

[0005] In existing technologies, atomizers are typically used to increase the contact area between water and oxygen to improve dissolved oxygen levels and ensure better oxygen dissolution in water. However, the oxygen content in oxygen-enriched water is often low and uneven. Consequently, the oxygen content in the enriched water fluctuates and decreases, making it difficult to accurately control the oxygen content in the feed water. Secondly, regarding oxygenation control, the instability of oxygen content in the enriched water in traditional liquid oxygenation devices, coupled with the lag in the system's water volume and oxygen content feedback control signal, leads to slow control system response and large fluctuations in the feed water oxygen content. Utility Model Content

[0006] This invention proposes a device for preparing and oxygenating liquid oxygen-enriched water, which solves the problems of uneven oxygen content in the prepared liquid oxygen-enriched water and sluggish control system operation caused by using only water oxygen content as the control signal in the prior art.

[0007] The technical solution of this utility model:

[0008] This invention discloses a device for preparing and oxygenating liquid oxygen-enriched water. The device includes a constant-pressure oxygen tank, a gas booster pump, a porous gas nozzle, an oxygen-enriched water storage tank, an atomizer, and a metering pump. The constant-pressure oxygen tank is connected to the gas booster pump and the porous gas nozzle in sequence through pipes. The porous gas nozzle is located at the bottom of the oxygen-enriched water storage tank. An atomizer is located at the upper part of the oxygen-enriched water storage tank and is connected to a demineralized water pipe. The demineralized water is sprayed into the oxygen-enriched water storage tank through the atomizer. The bottom of the oxygen-enriched water storage tank is connected to the inlet of the metering pump through a pipe, and the outlet of the metering pump is connected to the user's pipeline.

[0009] In some embodiments, the constant pressure oxygen tank is connected to an air compressor via a pipeline. A molecular sieve is provided between the air compressor and the constant pressure oxygen tank. The air compressor delivers air to the molecular sieve, and the air is filtered through the molecular sieve to become pure oxygen. The pure oxygen then flows to the constant pressure oxygen tank for storage.

[0010] In some embodiments, an isolation valve A is provided between the constant pressure oxygen tank and the gas booster pump, and a check valve A is provided between the gas booster pump and the multi-hole gas nozzle; the constant pressure oxygen tank is provided with an oxygen tank safety valve.

[0011] In some embodiments, the oxygen-enriched water storage tank is equipped with a storage tank safety valve, a pressure gauge 20, and a level gauge.

[0012] In some embodiments, a water supply valve is provided on the demineralized water pipeline.

[0013] In some embodiments, the bottom of the oxygen-enriched water storage tank is connected to one end of a circulation pump via a pipe, and the other end of the circulation pump is connected to the demineralized water pipe between the water supply valve and the atomizer via a pipe.

[0014] In some embodiments, an oxygen meter is installed downstream of the oxygenation point in the user pipeline, which is used to measure the oxygen content in the liquid oxygen-enriched water; a pressure regulating valve, an isolation valve B, and a check valve B are sequentially installed from the metering pump outlet to the user pipeline.

[0015] In some embodiments, two gas booster pumps and two metering pumps are provided.

[0016] In some embodiments, the device further includes a control system that collects measurement signals from the oxygen meter, level gauge, and pressure gauge, and controls the gas booster pump, circulation pump, water supply valve, and metering pump based on the measurement results.

[0017] In some embodiments, a pressure relief valve is installed on the metering pump outlet pipe, and the pressure relief valve is connected to the oxygen-enriched water storage tank through a pipe.

[0018] The beneficial effects of this utility model are:

[0019] 1. This utility model proposes a liquid oxygen-enriched water preparation and oxygenation device. This device uses a combination of an air compressor, molecular sieve, constant pressure oxygen tank and gas booster pump to provide high pressure pure oxygen, avoiding the fluctuation of oxygen content in oxygen-enriched water caused by the pressure fluctuation of oxygen source.

[0020] 2. This utility model proposes a liquid oxygen-enriched water preparation and oxygenation device. This device adopts a combination of a porous gas nozzle, an atomizer and a circulating pump to ensure that liquid water and oxygen can be fully contacted. Through multiple circulations by the circulating pump, the dissolved oxygen in the oxygen-enriched water storage tank is ensured to be sufficient and uniform.

[0021] 3. This utility model proposes a liquid oxygen-enriched water preparation and oxygenation device. This device adopts a joint control method based on the pressure, liquid level, and oxygen content signals of the oxygen-enriched water storage tank and the oxygen content signals of the user pipeline. It measures parameters of the liquid oxygen-enriched water production process from multiple aspects to ensure the stability of oxygen supply pressure, dissolved oxygen in oxygen-enriched water, and oxygen content in the user pipeline. Attached Figure Description

[0022] Figure 1 A schematic diagram of a liquid oxygen-enriched water preparation and oxygenation device designed for this utility model; Attached image description:

[0024] 1. Air compressor; 2. Molecular sieve; 3. Constant pressure oxygen tank; 31. Oxygen tank safety valve; 4. Isolation valve A; 5. Gas booster pump; 6. Check valve A; 7. Multi-hole gas nozzle; 8. Oxygen-enriched water storage tank; 81. Storage tank safety valve; 9. Nebulizer; 10. Circulation pump; 11. Demineralized water; 12. Water supply valve; 13. Metering pump; 131. Pressure relief valve; 14. Pressure regulating valve; 15. Isolation valve B; 16. Check valve B; 17. User pipeline; 18. Oxygen gauge; 19. Level gauge; 20. Pressure gauge; 21. Control system. Detailed Implementation

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] like Figure 1As shown, this utility model proposes a liquid oxygen-enriched water preparation and oxygenation device, including: an air compressor 1, a molecular sieve 2, a constant pressure oxygen tank 3, an oxygen tank safety valve 31, an isolation valve A4, a gas booster pump 5, a check valve A6, a porous gas nozzle 7, an oxygen-enriched water storage tank 8, an oxygen-enriched water storage tank 81, an atomizer 9, a circulation pump 10, demineralized water 11, a water supply valve 12, a metering pump 13, a metering pump 131, a pressure regulating valve 14, an isolation valve B15, a check valve B16, a user pipeline 17, an oxygen meter 18, a level gauge 19, a pressure gauge 20, and a control system 21.

[0027] The constant pressure oxygen tank 3 is connected to the air compressor 1 through a pipeline. A molecular sieve 2 is installed between the air compressor 1 and the constant pressure oxygen tank 3. The air compressor 1 uses air as a gas source. After passing through the molecular sieve 2, the outlet is pure oxygen, which flows to the constant pressure oxygen tank 3 for storage.

[0028] The constant-pressure oxygen tank 3 is equipped with an oxygen tank safety valve 31. The constant-pressure oxygen tank 3 is connected in sequence to a gas booster pump 5 and a multi-hole gas nozzle 7 via pipelines. An isolation valve A4 is installed between the constant-pressure oxygen tank 3 and the gas booster pump 5, and a check valve A6 is installed between the gas booster pump 5 and the multi-hole gas nozzle 7. The constant-pressure oxygen tank 3 is equipped with an oxygen tank safety valve 31. There are two gas booster pumps 5, one of which is used as a backup.

[0029] The oxygen-enriched water storage tank 8 has a multi-hole gas nozzle 7 at its bottom. The oxygen-enriched water storage tank 8 is equipped with a storage tank safety valve 81, a pressure gauge 20, and a level gauge 19. The level gauge 19 is installed in the lower liquid space inside the oxygen-enriched water storage tank 8; the pressure gauge 20 is installed in the upper gas space inside the oxygen-enriched water storage tank 8.

[0030] An atomizer 9 is installed in the upper part of the oxygen-enriched water storage tank 8. The atomizer 9 is connected to a demineralized water pipeline, which is equipped with a water supply valve 12. Demineralized water 11 is sprayed into the oxygen-enriched water storage tank 8 through the atomizer 9. After flowing through the water supply valve 12, the demineralized water 11 enters the upper gas space of the oxygen-enriched water storage tank 8 through the atomizer 9. The water source for the demineralized water 11 can be from a demineralized water tank, condensate system, etc. The liquid space at the bottom of the oxygen-enriched water storage tank 8 is connected to a circulation pump 10 through a pipeline. The other end of the circulation pump 10 is connected to the demineralized water pipeline between the water supply valve 12 and the atomizer 9 through a pipeline.

[0031] The bottom of the oxygen-enriched water storage tank 8 is connected to the inlet of the metering pump 13 via a pipe. The outlet of the metering pump 13 is connected to the user pipeline 17 via a pipe that passes sequentially through a pressure regulating valve 14, an isolation valve B15, and a check valve B16. Downstream of the oxygen supply point on the user pipeline 17, an oxygen meter 18 is installed to measure the oxygen content in the medium. A metering pump 131 is installed on the outlet pipe of the metering pump 13 and is connected to the oxygen-enriched water storage tank 8.

[0032] To prevent overpressure at the outlet of metering pump 13 and to accommodate users with different pressure levels, a pressure relief valve 131 is installed on the outlet pipeline of metering pump 13. The pressure relief valve 131 is connected to the oxygen-enriched water storage tank 8 via a pipeline. The pressure relief valve 131 has pressure regulation and overpressure protection functions. Simultaneously, the pressure regulating valve 14 has secondary pressure regulation capabilities. Two metering pumps 13 are provided, one of which is used as a backup.

[0033] The device is also equipped with a control system 21, which collects measurement signals from oxygen gauge 18, level gauge 19, and pressure gauge 20, and controls gas booster pump 5, circulation pump 10, water supply valve 12, and metering pump 13 based on the measurement results.

[0034] This utility model proposes a device for preparing and oxygenating liquid oxygen-enriched water. The specific implementation of this utility model is as follows:

[0035] Step 1: Preparation of pure oxygen, specifically:

[0036] Air compressor 1 uses air as a gas source to produce compressed air. After passing through molecular sieve 2, the compressed air exits as low-pressure pure oxygen, which flows to constant-pressure oxygen tank 3 for storage.

[0037] Step 2: Preparation of oxygen-enriched water, specifically:

[0038] Gas booster pump 5 pressurizes pure oxygen, spraying high-pressure pure oxygen from its outlet. This high-pressure pure oxygen passes through porous gas nozzle 7, then through demineralized water 11, water supply valve 12, and atomizer 9 into the upper gas space of oxygen-enriched water storage tank 8. There, it mixes thoroughly with the pure oxygen to form oxygen-enriched water. The operation of circulation pump 10 ensures continuous circulation of water in oxygen-enriched water storage tank 8, guaranteeing uniform oxygen-enriched water with dissolved oxygen levels reaching or approaching the theoretical saturation level. Circulation pump 10 has two types of automatic start / stop signals: one is timed automatic start / stop, and the other is synchronous start / stop based on the start / stop status of metering pump 13.

[0039] The system includes a level gauge 19 that measures the water level in the oxygen-enriched water storage tank 8 and transmits the signal to the control system 21. The control system 21 outputs a control command to the water supply valve 12 based on the deviation between the target water level and the measured water level, automatically adjusting the valve's opening to ensure the water level in the oxygen-enriched water storage tank 8 remains within the target range and remains stable. A pressure gauge 20 measures the pressure inside the oxygen-enriched water storage tank 8 and transmits the signal to the control system 21. The control system 21 outputs a control command to the gas booster pump 5 based on the deviation between the target pressure and the measured pressure, automatically controlling its start and stop to ensure the pressure inside the oxygen-enriched water storage tank 8 remains within the target range and remains stable. Through these methods, the pressure, water level, and dissolved oxygen content in the oxygen-enriched water storage tank 8 can be ensured to be stable.

[0040] Step 3: System oxygenation, specifically:

[0041] During the unit startup phase, the flow rate in user pipeline 17 changes, the oxygen content in oxygen-enriched water storage tank 8 is stably supplied, metering pump 13 operates automatically according to the control signal from control system 21, and the oxygen content in user pipeline 17 measured by oxygen meter 18 fluctuates within a small range. Oxygen meter 18 is installed downstream of the oxygen supply point in user pipeline 17 to measure the oxygen content of the medium in user pipeline 17 in real time. The measurement signal from oxygen meter 18 is transmitted to control system 21. Based on the deviation between the measured oxygen content and the target oxygen content, control system 21 outputs control commands to metering pump 13 for automatic start and stop of metering pump 13.

[0042] During normal operation of the unit, the flow rate of user pipeline 17 is relatively stable, and the oxygen content of oxygen-enriched water storage tank 8 is supplied stably. The metering pump 13 runs continuously, and the oxygen content of user pipeline 17 measured by oxygen meter 18 fluctuates very little.

[0043] During the planned power reduction shutdown phase of the unit, the flow rate of user pipeline 17 changes significantly. At this time, metering pump 13 stops operating, and oxygen meter 18 measures the oxygen content of user pipeline 17 to guide the chemical control during unit shutdown.

[0044] The embodiments of this utility model have been described in detail above. This utility model is not limited to the above examples. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model.

Claims

1. A liquid oxygen-rich water preparation and oxygenation device, characterized by, The device comprises a constant pressure oxygen tank (3), a gas booster pump (5), a porous gas nozzle (7), an oxygen-enriched water storage tank (8), an atomizer (9) and a metering pump (13); the constant pressure oxygen tank (3) is connected with the gas booster pump (5) and the porous gas nozzle (7) through pipes in sequence, the porous gas nozzle (7) is arranged at the bottom of the inside of the oxygen-enriched water storage tank (8), the upper part of the inside of the oxygen-enriched water storage tank (8) is provided with the atomizer (9), the atomizer (9) is connected with a desalted water pipe, the desalted water (11) is sprayed into the oxygen-enriched water storage tank (8) through the atomizer (9); the bottom of the oxygen-enriched water storage tank (8) is connected with the inlet of the metering pump (13) through a pipe, and the outlet of the metering pump (13) is connected with a user pipe (17).

2. The liquid oxygen-rich water preparation and oxygenation device according to claim 1, characterized in that, The constant pressure oxygen tank (3) is connected with an air compressor (1) through a pipe, a molecular sieve (2) is arranged between the air compressor (1) and the constant pressure oxygen tank (3), and the air compressor (1) sends air to the molecular sieve (2), and the air is filtered into pure oxygen by the molecular sieve (2), and the pure oxygen flows to the constant pressure oxygen tank (3) for storage.

3. The device for preparing and oxygenating liquid oxygen-rich water according to claim 1, characterized in that, An isolation valve A (4) is arranged between the constant pressure oxygen tank (3) and the gas booster pump (5), and a check valve A (6) is arranged between the gas booster pump (5) and the porous gas nozzle (7); an oxygen tank safety valve (31) is arranged on the constant pressure oxygen tank (3).

4. The liquid oxygen-rich water preparation and oxygenation device according to claim 3, characterized in that, An oxygen tank safety valve (81), a pressure gauge (20) and a liquid level gauge (19) are arranged on the oxygen-enriched water storage tank (8).

5. The liquid oxygen-rich water preparation and oxygenation device according to claim 4, characterized in that, A water supplement valve (12) is arranged on the desalted water pipe.

6. The liquid oxygen-rich water preparation and oxygenation device according to claim 5, characterized in that, One end of a circulating pump (10) is connected to the bottom of the oxygen-enriched water storage tank (8) through a pipe, and the other end of the circulating pump (10) is connected to the desalted water pipe between the water supplement valve (12) and the atomizer (9) through a pipe.

7. The liquid oxygen-rich water preparation and oxygenation device according to claim 6, characterized in that, An oxygen meter (18) is arranged downstream of an oxygen adding point of the user pipe (17), and the oxygen meter (18) is used for measuring the oxygen content in liquid oxygen-enriched water; a pressure regulating valve (14), an isolation valve B (15) and a check valve B (16) are arranged in sequence from the outlet of the metering pump (13) to the user pipe (17).

8. The liquid oxygen-rich water preparation and oxygenation device according to claim 1, characterized in that, Two of each of the gas booster pump (5) and the metering pump (13) are arranged.

9. The liquid oxygen-rich water preparation and oxygenation device according to claim 7, characterized in that, The device is further provided with a control system (21), which collects measurement signals of the oxygen meter (18), the liquid level gauge (19) and the pressure gauge (20), and controls the gas booster pump (5), the circulating pump (10), the water supplement valve (12) and the metering pump (13) according to the measurement signal results.

10. The liquid oxygen-rich water preparation and oxygenation device according to claim 1, characterized in that, A pressure relief valve (131) is installed on the outlet pipe of the metering pump (13), and the pressure relief valve (131) is connected with the oxygen-enriched water storage tank (8) through a pipe.

Images