CN219031917U - Water supply oxygenation conversion device - Google Patents

Abstract

The utility model discloses a feed water oxygenation conversion device which is used for a supercritical unit or an oxygenation conversion test of the supercritical unit; comprises an oxygen source, a condensed water source and a mixed storage tank; the outlet end of the oxygen source and the outlet end of the condensed water source are connected with the feed inlet of the mixing storage tank, and the discharge outlet of the mixing storage tank is divided into three paths; the first path is connected with a water supply oxygenation point of the supercritical unit or the ultra-supercritical unit, the second path is connected with a condensate oxygenation point of the supercritical unit or the ultra-supercritical unit, and the third path is connected with a high-oxygenation hydrophobic oxygenation point of the supercritical unit or the ultra-supercritical unit; the supercritical unit or the ultra supercritical unit is provided with the existing oxygenation equipment; wherein, the existing oxygenation equipment adopts gaseous oxygenation equipment; according to the utility model, liquid oxygen-enriched water is used as an oxygenation medium in the oxygenation conversion period, so that the accuracy of oxygenation is improved, the risks of rising of hydrogen conductivity and falling of oxide scale in a water vapor system of a unit are avoided, and the safety in the oxygenation conversion period is improved.

Description

A feed water oxygenation conversion device

technical field

The utility model belongs to the technical field of chemical feedwater oxygenation treatment for power plants, in particular to a feedwater oxygenation conversion device.

Background technique

Thermal power units mostly adopt high-efficiency, clean, low-carbon supercritical units or ultra-supercritical units; under the circumstances of mixed coal combustion, large-scale grid connection of new energy sources, frequent peak-shaving start-stops, and reduced annual utilization time, supercritical units or The thermal equipment in the ultra-supercritical unit is faced with the requirements of anti-corrosion and anti-scaling during operation; among them, under the AVT operation state of the unit, the flow channel of the water supply and drainage system will accelerate corrosion, which will seriously affect the safe operation of the unit.

In the prior art, the purpose of anti-corrosion and anti-scaling of thermal equipment such as water vapor system is generally achieved by adding oxygen to the water; specifically, by adding an appropriate amount of dissolved oxygen to the condensate system, water supply system and high-water drainage system, the thermal equipment can be The Fe ₃ O ₄ on the surface of the pipeline is converted into a double-layer protective film of Fe ₃ O ₄ +Fe ₂ O ₃ , thereby effectively realizing the corrosion protection for thermal equipment.

At present, most of the existing oxygenation equipment uses air and oxygen as the oxygenation medium. Due to the compressibility of the gas, it is difficult to accurately control the amount of oxygenation; Accidents that the water vapor hydrogen conductivity increases or the scale of the furnace tube falls off occur.

Utility model content

Aiming at the technical problems existing in the prior art, the utility model provides a feedwater oxygenation conversion device to solve the problem that the existing oxygenation equipment is difficult to accurately control the oxygenation amount, and the water vapor hydrogen conductivity is prone to occur in the oxygenation conversion test. The technical problem of rising or furnace tube oxide skin shedding accidents.

In order to achieve the above object, the technical solution adopted by the utility model is:

The utility model provides a feedwater oxygenation conversion device, which is used for the oxygenation conversion test of a supercritical unit or an ultra-supercritical unit; the feedwater oxygenation conversion device includes an oxygen source, a condensed water source and a mixing storage tank;

The outlet end of the oxygen source and the outlet end of the condensed water source are connected to the feed port of the mixing storage tank, and the discharge port of the mixing storage tank is divided into three ways; wherein, the first way is connected with the supercritical The feed water oxygenation point of the unit or ultra-supercritical unit is connected, the second line is connected with the condensate oxygenation point of the supercritical unit or ultra-supercritical unit, and the third line is connected with the supercritical unit or ultra-supercritical unit. Oxygen points connected;

The supercritical unit or the ultra-supercritical unit is provided with existing oxygenation equipment; wherein, the existing oxygenation equipment adopts gaseous oxygenation equipment.

Further, the oxygen source includes a gas storage device, a pressure reducing valve and a pressure stabilizing valve; oxygen or air is stored in the gas storage device, and the outlet end of the gas storage device is connected to the inlet end of the pressure reducing valve , the outlet end of the pressure reducing valve is connected with the inlet end of the pressure stabilizing valve, and the outlet end of the pressure stabilizing valve is connected with the feed port of the mixing storage tank.

Further, the condensed water source includes a condensed water polishing outlet main pipe, a first booster pump and a first stop valve, the outlet end of the condensed water polishing outlet main pipe is connected to the inlet end of the first booster pump The outlet port of the first booster pump is connected with the inlet port of the first shut-off valve, and the outlet port of the first shut-off valve is connected with the feed port of the mixing storage tank.

Further, the mixing storage tank includes a storage tank body, an atomizing nozzle and an agitator;

The upper end of the storage tank body is provided with a feed port, one side of the feed port is connected to the outlet end of the oxygen source and the outlet end of the condensed water source; the atomizing nozzle is installed on the storage tank The inner top of the tank body, the other side of the feed port is connected to the inlet end of the atomizing nozzle;

The agitator is arranged at the inner bottom end of the storage tank body; the lower side wall of the storage tank body is provided with a discharge port; the bottom end of the storage tank body is provided with a sewage outlet; wherein, the sewage discharge A drain valve is installed at the mouth.

Further, the hybrid storage tank also includes a liquid level gauge and a pressure gauge; the liquid level gauge is set on the storage tank body for real-time acquisition of liquid level data in the storage tank body; the pressure gauge is set on the The top of the storage tank body is used to acquire the internal pressure data of the storage tank body in real time.

Further, the withstand pressure p of the storage tank body is: 1.6MPa≤p<10.0MPa; the hole diameter of the atomizing nozzle is not greater than 0.2mm, and the spray volume of the atomizing nozzle is greater than 0.3L/min.

Further, a second booster pump and a fifth stop valve are sequentially arranged on the first road of the discharge port of the storage tank body; a third booster pump and a fifth stop valve are sequentially provided on the second road of the discharge port of the mixing storage tank. Six shut-off valves; the fourth booster pump and the seventh shut-off valve are sequentially arranged on the third road of the outlet of the mixing storage tank.

Further, the gas pressure at the outlet of the oxygen source is not less than 1.2MPa; the condensate pressure at the outlet of the condensate source is greater than or equal to 1.2MPa.

Further, the gaseous oxygenation equipment adopts an oxygenation device using air or oxygen as the oxygenation medium; the first outlet end of the gaseous oxygenation equipment is connected to the feed water oxygenation point, and the gaseous oxygenation equipment The second outlet port is connected to the condensed water oxygenation point, and the third outlet port of the gaseous oxygenation equipment is connected to the high-addition hydrophobic oxygenation point.

Further, the first outlet end of the gaseous oxygenation equipment is provided with a second stop valve, the second outlet end of the gaseous oxygenation equipment is provided with a third shutoff valve, and the third stop valve of the gaseous oxygenation equipment is A fourth shut-off valve is arranged at the outlet end.

Compared with the prior art, the beneficial effects of the utility model are:

The utility model provides a feed water oxygenation conversion device, which connects the oxygen source and the condensed water source to the mixed storage tank, and the oxygen and condensed water are mixed in the mixed storage tank to form liquid oxygen-enriched water, and the liquid oxygen-enriched water is used as the oxygenation The oxygenation medium in the transformation test realizes the precise control of the amount of oxygenation, ensures the safety during the oxygenation transformation test, and avoids the risk of water vapor hydrogen conductivity increase and scale shedding; at the same time, in the oxygenation transformation test After the completion, the gaseous oxygenation equipment is used to add oxygen to ensure the normal operation of the unit; the device has a simple structure and is easy to operate. After the oxygenation conversion test is completed, the equipment can be dismantled and reused, which reduces the cost of equipment installation and manufacturing and significantly improves equipment efficiency.

Furthermore, the oxygen source and the condensed water source are connected to the atomizing nozzle, and an agitator is installed at the inner bottom of the storage tank body, which improves the mixing efficiency of oxygen and condensed water, and realizes the control of the oxygen content of the liquid oxygen-enriched water. Precise control.

Description of drawings

Fig. 1 is a schematic structural view of the feedwater oxygenation conversion device described in the present invention.

Among them, 1 gas storage equipment, 2 pressure reducing valve, 3 pressure stabilizing valve, 4 condensate polishing outlet main pipe, 5 first booster pump, 6 first stop valve, 7 mixing storage tank, 8 atomizing nozzle, 9 Agitator, 10 liquid level gauge, 11 pressure gauge, 12 drain valve, 13 gaseous oxygenation equipment, 14 second stop valve, 15 third stop valve, 16 fourth stop valve, 17 second booster pump, 18 fifth Stop valve, 19 the 3rd booster pump, 20 the 6th stop valve, 21 the 4th booster pump, 22 the 7th stop valve.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects solved by the utility model clearer, the following specific examples will further describe the utility model in detail. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

As shown in Figure 1, the utility model provides a feedwater oxygenation conversion device, the feedwater oxygenation conversion device is used for the oxygenation conversion test of a supercritical unit or an ultra-supercritical unit; the feedwater oxygenation conversion device , including oxygen source, condensed water source, mixing pipeline and mixing storage tank 7.

Oxygen or air is stored in the oxygen source, and condensed water is stored in the condensed water source; the outlet end of the oxygen source is connected to the first inlet of the mixing pipeline, and the outlet end of the condensed water source is connected to the The second inlet of the mixing pipeline is connected; the outlet end of the mixing pipeline is connected with the feed port of the mixing storage tank 7 .

The outlet of the mixing storage tank 7 is set in three ways; wherein, the first way is connected with the feed water oxygenation point of the supercritical unit or the ultra-supercritical unit as a condensed water oxygenation delivery system; the second way is connected with the supercritical unit The condensed water oxygenation point of the unit or ultra-supercritical unit is connected as a feed water oxygenation delivery system; the third line is connected with the supercritical unit or ultra-supercritical unit’s high-water drainage and oxygenation point, which is used as a high-water drainage and oxygenation delivery system ; Each channel transports the liquid oxygen-enriched water to the oxygenation pipeline of the original gaseous oxygenation equipment through the booster pump, so as to realize the oxygenation of the supercritical unit or ultra-supercritical unit.

In the utility model, the oxygen source includes a gas storage device 1, a pressure reducing valve 2 and a pressure stabilizing valve 3, and oxygen or air is stored in the gas storage device 1; the outlet end of the gas storage device 1 is connected to the The inlet end of the pressure reducing valve 2 is connected, the outlet end of the pressure reducing valve 2 is connected with the inlet end of the pressure stabilizing valve 3, and the outlet end of the pressure stabilizing valve 3 is connected with the first inlet of the mixing pipeline ; That is, the outlet end of the pressure stabilizing valve 3 is connected to the feed port of the mixing storage tank 7 through a mixing pipeline; preferably, the gas storage device 1 is a gas cylinder; the gas cylinder is in use wherein the internal pressure is not less than 1.5MPa; the pressure of the oxygen or air in the gas cylinder after being decompressed by the pressure reducing valve 2 is not less than 1.2MPa, so as to ensure that the oxygen or air in the oxygen cylinder passes through the pressure reducing valve Can enter the mixing storage tank 7 .

In the present utility model, the condensed water source includes a condensed water polishing outlet main pipe 4, a first booster pump 5 and a first stop valve 6; the outlet end of the condensed water polishing outlet main pipe 4 is connected to the first The inlet port of the booster pump 5 is connected, the outlet port of the first booster pump 5 is connected with the inlet port of the first shut-off valve 6, and the outlet port of the first shut-off valve 6 is connected with the mixing pipeline. The second inlet is connected; that is, the outlet end of the first shut-off valve 6 is connected with the feed port of the mixing storage tank 7 through a mixing pipeline; wherein, the first booster pump 5 is used for The condensed water in the water finishing outlet main pipe 4 is pressurized, and the pressure of the pressurized condensed water is greater than or equal to 1.2 MPa, so as to ensure that the pressurized condensed water can enter the mixing storage tank 7 .

In the utility model, the mixing storage tank 7 includes a storage tank body, an atomizing nozzle 8, an agitator 9, a liquid level gauge 10, and a pressure gauge 11; the storage tank body is a high-pressure sealed tank body, and the storage tank body The upper end of the feed port is provided with a feed port, and one side of the feed port is connected to the outlet end of the mixing pipeline; the atomizing nozzle 8 is installed on the inner top of the storage tank body, and the feed port The other side is connected to the inlet end of the atomizing nozzle 8 through a pipeline; the agitator 9 is arranged at the inner bottom end of the storage tank body, and the agitator 9 is used for transporting to the storage tank body. Oxygen and condensed water are stirred and mixed to form liquid oxygen-enriched water; wherein, the storage tank body adopts a high-pressure tank body, and the volume of the high-pressure storage tank is greater than or equal to 50L; the pressure resistance p of the storage tank body is: 1.6 MPa≤p<10.0MPa; the aperture diameter of the atomizing nozzle 8 is not greater than 0.2mm, and the spray volume of the atomizing nozzle 8 is greater than 0.3L/min.

The lower end side wall of the storage tank body is provided with a discharge port, and the discharge port is respectively connected with the feed water oxygenation point, condensate water oxygenation point and high gas addition point of the supercritical unit or ultra-supercritical unit through three-way conveying branch pipes. The hydrophobic and oxygenation points are connected; among them, the second booster pump 17 and the fifth stop valve 18 are sequentially arranged on the first delivery branch pipe; the third booster pump 19 and the sixth stop valve are sequentially arranged on the second delivery branch pipe 20. The fourth booster pump 21 and the seventh shut-off valve 22 are sequentially arranged on the third delivery branch pipe; wherein, the liquid oxygen-enriched water flowing out of the storage tank body passes through the second booster pump on the first delivery branch pipe. 17 to pressurize, the pressure of the liquid oxygen-enriched water after pressurization is greater than 2MPa; the liquid oxygen-enriched water flowing out from the storage tank body is pressurized by the third booster pump 19 on the second delivery branch pipe, after the pressurization The pressure of the liquid oxygen-enriched water is greater than 4MPa; the liquid oxygen-enriched water flowing out of the storage tank body is pressurized by the fourth booster pump 21 on the third delivery branch pipe, and the pressure of the liquid oxygen-enriched water after the pressurization is greater than 12 MPa.

The bottom end of the storage tank body is provided with a drain outlet, and the drain valve 12 is installed at the drain outlet; wherein, the drain valve 12 is used to discharge unqualified water in the tank body; The liquid level gauge 10 is arranged on the storage tank body for real-time acquisition of liquid level data in the storage tank body; the pressure gauge 11 is arranged on the top of the storage tank body for real-time acquisition of the inside of the storage tank body pressure data.

In the utility model, the existing oxygenation equipment is arranged in the supercritical unit or the ultra-supercritical unit; wherein, the existing oxygenation equipment adopts gaseous oxygenation equipment 13, and the gaseous oxygenation equipment 13 adopts air Or an oxygenation device in which oxygen is the oxygenation medium; the gaseous oxygenation device 13 is provided with three outlets, including a first outlet, a second outlet and a third outlet.

Wherein, the first outlet port is connected to the feed water oxygenation point of the supercritical unit or the ultra-supercritical unit through the first pipeline, and the second shut-off valve 14 is arranged on the first pipeline; The second pipeline is connected with the condensed water oxygenation point of the supercritical unit or the ultra-supercritical unit, and the third shut-off valve 15 is arranged on the second pipeline; the third outlet is connected with the supercritical unit or the ultra-supercritical unit The high water-repellent oxygenation points are connected to each other, and a fourth shut-off valve 16 is arranged on the third pipeline.

In the present utility model, the first stop valve 6, the second stop valve 14, the third stop valve 15, the fourth stop valve 16, the fifth stop valve 18, the sixth stop valve 20 and the seventh stop valve 22, adopt Manual shut-off valve or electric shut-off valve.

In the feed water oxygenation conversion device described in the utility model, the discharge port of the mixing storage tank is divided into three routes, and each route transports the liquid oxygen-enriched water to the supercritical unit or the ultra-supercritical unit through a booster pump. On the oxygenation pipeline of the gaseous oxygenation equipment; liquid oxygen-enriched water is used as the oxygenation medium during oxygenation conversion, because the oxygen-enriched water is liquid and incompressible, the oxygen content in it is easy to control; therefore, by controlling the liquid state The amount of oxygen-enriched water added can effectively ensure the precise control of the amount of oxygen added during the oxygenation conversion, so as to achieve absolute safety during the oxygenation conversion of the supercritical unit or ultra-supercritical unit.

working principle:

When the supercritical unit or the ultra-supercritical unit is in normal operation and is in the AVT (O) working condition, the oxygenation conversion test is carried out by using the feedwater oxygenation conversion device described in the utility model; wherein, the gaseous oxygenation equipment is ensured 13 and its pipeline installation is complete and correct; among them, the specific process is as follows:

First, close the second shut-off valve 14, the third shut-off valve 15, and the fourth shut-off valve 16; then, open the first booster valve 5 and the first shut-off valve 6, and simultaneously open the decompression valve 2 and the pressure stabilizing valve. valve 3, so that the gas in the gas storage device 1 and the condensed water in the condensed water polishing outlet main pipe 4 are mixed, and then transported through the atomizing nozzle 8 and stored in the storage tank body; then, the agitator 9 is turned on, and the Under the action of the agitator 9, the gas stored in the storage tank body and the condensed water are fully mixed to obtain liquid oxygen-enriched water with a preset concentration; wherein, the liquid level gauge 10 and the pressure gauge 11 are used to monitor the gas in the storage tank body in real time. Liquid level and pressure; when the water quality in the storage tank is unqualified or the liquid level is higher than the preset threshold, open the drain valve 12 to drain water or change the water; then, open the second booster pump 17 and the fifth shut-off valve 18 in sequence , the third booster pump 19, the sixth shut-off valve 20, the fourth booster pump 21 and the seventh shut-off valve 22, in the role of the second booster pump 17, the third booster pump 19 and the fourth booster pump 21 Next, the liquid oxygen-enriched water is transported to the feed water oxygenation point, condensate water oxygenation point, and superhydrophobic oxygenation point of the supercritical unit or ultra-supercritical unit respectively, and the oxygenation conversion test is started.

After the test is over, close the seventh shut-off valve 22, the fourth booster pump 21, the sixth shut-off valve 20, the third booster pump 19, the fifth shut-off valve 18, the second booster pump 17, the pressure reducing valve 2, The pressure stabilizing valve 3, the first shut-off valve 6 and the first booster pump 5; then open the gaseous oxygenation equipment 13 and the second shut-off valve 14, the third shut-off valve 15 and the fourth shut-off valve 16, put into operation The gaseous oxygenation equipment 13 is described, and the unit switches to the oxygenation operation mode.

The feedwater oxygenation conversion device described in the utility model uses the gas storage device 1 to supply gas, which passes through the pressure reducing valve 2 and the pressure stabilizing valve 3 and then mixes with the condensed water from the outlet main pipe 4 of the condensed water finishing treatment, and is atomized The nozzle 8 forms liquid oxygen-enriched water in the storage tank body under the agitation of the agitator 9; The oxygen water is boosted to the pressure requirement of each oxygen point in the supercritical unit or ultra-supercritical unit, so as to realize the supercritical unit or ultra-supercritical unit’s feed water oxygenation point, condensate oxygenation point and high water drainage Oxygenation operation at the oxygenation point; in the utility model, the mixing storage tank is used to mix oxygen and condensed water to form liquid oxygen-enriched water, and the liquid oxygen-enriched water is used as the oxygenation medium during oxygenation conversion to improve the efficiency of oxygenation Accuracy, avoiding the risk of increased hydrogen conductivity and scale shedding in the water vapor system of the unit, improving safety during oxygenation conversion.

In the utility model, the gas cylinder is an oxygen cylinder and an air cylinder; wherein, when the oxygen cylinder is used, oxygen-enriched water with a higher concentration can be prepared, and it is convenient to adjust the oxygen content in the oxygen-enriched water; When the pressure at the outlet is greater than 1.2 MPa, the first booster pump does not need to be turned on during the oxygenation conversion period; the gaseous oxygenation equipment adopts the existing oxygenation equipment in the supercritical unit or ultra-supercritical unit.

The feed water oxygenation conversion device described in the utility model is suitable for the oxygenation conversion period of the supercritical unit or the ultra supercritical unit, the unit is running normally and is in the AVT (O) working condition, and the oxygenation conversion work has not yet been carried out; During the oxygenation conversion period of the critical unit or ultra-supercritical unit, liquid oxygen-enriched water is used as the oxygenation medium during the oxygenation conversion period to realize precise control of the oxygenation amount and ensure the safety during the oxygenation conversion period; the equipment structure is convenient, It is easy to use and greatly improves the safety of unit operation during oxygenation conversion.

The feedwater oxygenation conversion device described in the utility model is suitable for a supercritical unit or an ultra-supercritical unit that adopts gaseous oxygenation equipment for oxygenation treatment; wherein, in the oxygenation conversion test, the second shut-off valve and the third shut-off valve are kept and the fourth stop valve is closed; the structure of the device is simple, the operation is convenient, and the transformation cost is low. It only needs to weld the pipeline corresponding to the outlet of the storage tank body to the existing oxygenation pipeline, and then the oxygenation conversion test can be carried out without After the existing oxygenation equipment is changed, and after the oxygenation conversion test is completed, the equipment of the feedwater oxygenation conversion device is cut and the corresponding interface is blocked, the existing gaseous equipment can be used for oxygenation.

In the utility model, because the oxygenation medium is liquid oxygen-enriched water, the oxygenation amount is accurately and controllable during the oxygenation conversion period, thereby ensuring the safety during the oxygenation conversion period, and avoiding the increase of the conductivity of water vapor and hydrogen and the peeling off of oxide skin and other risks, providing a strong guarantee for the safe and economical operation of the unit; after completing the oxygenation conversion test, the equipment can be dismantled and reused, reducing the cost of equipment installation and manufacturing, and significantly improving the efficiency of equipment use.

The above-mentioned embodiment is only one of the implementations that can realize the technical solution of the utility model, and the scope of protection claimed by the utility model is not only limited by the embodiment, but also includes within the technical scope disclosed in the utility model, any Variations, substitutions and other implementations can easily occur to those skilled in the art.

Claims (10)

1. A feedwater oxygenation conversion device is characterized in that, it is used for the oxygenation conversion test of a supercritical unit or an ultra-supercritical unit; the feedwater oxygenation conversion device includes an oxygen source, a condensed water source and a mixing storage tank (7 ); The outlet end of the oxygen source and the outlet end of the condensed water source are all connected to the feed port of the mixing storage tank (7), and the discharge port of the mixing storage tank (7) is arranged in three ways; wherein, The first road is connected to the feed water oxygenation point of the supercritical unit or ultra-supercritical unit, the second road is connected to the condensate oxygenation point of the supercritical unit or ultra-supercritical unit, and the third road is connected to the supercritical unit or ultra-supercritical unit. The high-pressure and hydrophobic oxygen-adding points of the unit are connected; The supercritical unit or the ultra-supercritical unit is provided with existing oxygenation equipment; wherein, the existing oxygenation equipment adopts gaseous oxygenation equipment (13). 2. A feedwater oxygenation conversion device according to claim 1, characterized in that the oxygen source comprises a gas storage device (1), a pressure reducing valve (2) and a pressure stabilizing valve (3); Oxygen or air is stored in the gas equipment (1), the outlet port of the gas storage device (1) is connected to the inlet port of the pressure reducing valve (2), and the outlet port of the pressure reducing valve (2) is connected to the The inlet end of the pressure stabilizing valve (3) is connected, and the outlet end of the pressure stabilizing valve (3) is connected with the feed port of the mixing storage tank (7). 3. A feedwater oxygenation conversion device according to claim 1, characterized in that the condensed water source comprises a condensed water polishing outlet main pipe (4), a first booster pump (5) and a first stop valve (6), the outlet end of the condensate finishing outlet main pipe (4) is connected to the inlet end of the first booster pump (5), and the outlet end of the first booster pump (5) is connected to the outlet end of the first booster pump (5) The inlet port of the first stop valve (6) is connected, and the outlet port of the first stop valve (6) is connected with the feed port of the mixing storage tank (7). 4. A feedwater oxygenation conversion device according to claim 1, characterized in that the mixing storage tank (7) comprises a storage tank body, an atomizing nozzle (8) and an agitator (9); The upper end of the storage tank body is provided with a feed port, one side of the feed port is connected to the outlet end of the oxygen source and the outlet end of the condensed water source; the atomizing nozzle (8) is installed on The inner top of the storage tank body, the other side of the feed port is connected to the inlet end of the atomizing nozzle (8); The agitator (9) is arranged at the inner bottom end of the storage tank body; the lower side wall of the storage tank body is provided with a discharge port; the bottom end of the storage tank body is provided with a sewage outlet; wherein, A blowdown valve (12) is installed at the blowdown outlet. 5. A feedwater oxygenation conversion device according to claim 4, characterized in that the mixing storage tank (7) also includes a liquid level gauge (10) and a pressure gauge (11); the liquid level gauge ( 10) set on the storage tank body for real-time acquisition of liquid level data in the storage tank body; the pressure gauge (11) is set on the top of the storage tank body for real-time acquisition of the inside of the storage tank body pressure data. 6. A feedwater oxygenation conversion device according to claim 4, characterized in that the withstand pressure p of the storage tank body is: 1.6MPa≤p<10.0MPa; the atomization nozzle (8) The hole diameter is not greater than 0.2mm, and the spray volume of the atomizing nozzle (8) is greater than 0.3L/min. 7. A feedwater oxygenation conversion device according to claim 4, characterized in that a second booster pump (17) and a fifth shut-off valve (18) are sequentially arranged on the first road of the outlet of the storage tank body ); the second road of the outlet of the mixing storage tank (7) is provided with the third booster pump (19) and the sixth shut-off valve (20); the outlet of the mixing storage tank (7) is A fourth booster pump (21) and a seventh shut-off valve (22) are sequentially arranged on the three roads. 8. A feedwater oxygenation conversion device according to claim 1, characterized in that the gas pressure at the outlet of the oxygen source is not less than 1.2MPa; the condensate pressure at the outlet of the condensate source is greater than or equal to 1.2MPa. 9. A feedwater oxygenation conversion device according to claim 1, characterized in that, said gaseous oxygenation equipment (13) adopts an oxygenation device using air or oxygen as an oxygenation medium; said gaseous oxygenation equipment (13) The first outlet end is connected with the described feed water oxygenation point, the second outlet end of the gaseous oxygenation equipment (13) is connected with the described condensation water oxygenation point, the gaseous oxygenation equipment (13) The third outlet port is connected to the high-adding hydrophobic oxygen-adding point. 10. A feedwater oxygenation conversion device according to claim 8, characterized in that a second cut-off valve (14) is provided at the first outlet end of the gaseous oxygenation equipment (13), and the gaseous oxygenation equipment (13) is A third cut-off valve (15) is arranged at the second outlet end of the oxygen equipment (13), and a fourth cut-off valve (16) is arranged at the third outlet end of the gaseous oxygen adding equipment (13).

Images