Steam waste heat and waste pressure power generation system of high-pressure deaerator

Abstract

The invention relates to the technical field of heat recovery, in particular to a steam waste heat and waste pressure power generation system of a high-pressure deaerator. Comprising a heat preservation box, a steam generator set, a boiler, a hot air output mechanism and a gas treatment mechanism. An air inlet pipe is connected between the heat preservation box and the output end of the high-pressure deaerator. The steam generator set comprises a generator body, a steam impeller shell and a steam impeller. The boiler is installed on the inner side of the heat preservation box, and a natural gas combustion device used for heating the boiler is installed on the heat preservation box. The hot air output mechanism is used for conveying hot air into the steam impeller shell; the gas treatment mechanism is connected to the tail end of the steam impeller shell and used for treating waste gas. The oxygen content and the water content in the steam impeller shell can be reduced, so that the interior of the steam impeller shell can be prevented from being quickly oxidized, and the service life of the steam generator set is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of heat recovery, and in particular to a steam waste heat and waste pressure power generation system of a high-pressure deaerator. Background Art

[0002] The softened water supplied to the boiler needs to be deoxygenated by a thermal deaerator. Thermal deaerator is the most traditional and thorough deoxygenation method. The thermal deaerator generally heats the softened water to 104°C through steam. After the water is heated to 104°C, the oxygen and other non-condensable gases dissolved in the softened water are discharged from the water to the surface, and the oxygen and other non-condensable gases are discharged to the outside through the vent pipe of the deaerator. Although thermal deaerator discharges oxygen from the softened water, since the softened water is heated to 104°C, some of the steam and heat generated by the softened water will be directly discharged to the outside along with the oxygen and other non-condensable gases through the vent pipe of the deaerator, which will cause a waste of heat energy and water resources.

[0003] In the prior art, the method for recovering the above-mentioned steam heat is mainly to connect the steam to the steam generator set. Since the steam carries a large amount of oxygen and in the initial state, the high-temperature steam enters the impeller casing. Due to the large temperature difference, the high-temperature steam quickly liquefies into water droplets and falls into the impeller casing. Due to the entry of water and a large amount of oxygen, the oxidation and corrosion of its internal parts and coatings are easily accelerated. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the background technology and to propose a steam waste heat and waste pressure power generation system for a high-pressure deaerator.

[0005] The technical solution of the present invention is a steam waste heat and waste pressure power generation system of a high-pressure deaerator, comprising:

[0006] An insulated box, wherein an air inlet pipe is connected between the insulated box and the output end of the high-pressure deaerator;

[0007] A steam generator set, the steam generator set comprises a generator body, a steam impeller housing and a steam impeller, the steam impeller housing is mounted on the side of the generator body, the steam impeller is rotatably mounted on the inner side of the steam impeller housing, and the rotating shaft of the steam impeller is connected to the rotating shaft of the generator body;

[0008] A boiler is installed inside a heat preservation box, a natural gas combustion device for heating the boiler is installed on the heat preservation box, an air outlet pipe is connected to the heat preservation box, one end of the air outlet pipe is connected to a connecting pipe, and one end of the connecting pipe is connected to the inside of the steam impeller housing;

[0009] A hot air output mechanism for delivering hot air to the interior of the steam impeller housing;

[0010] A gas treatment mechanism connected to the end of the steam impeller casing for treating exhaust gas.

[0011] Preferably, the other end of the connecting pipe is connected to the heat preservation box, the first solenoid valve and the second solenoid valve are respectively installed at both ends of the connecting pipe, and an oxygen concentration detection sensor is installed on the air outlet pipe.

[0012] Preferably, the natural gas combustion device includes a natural gas storage tank, a flow control valve, a natural gas output pipe, an atomizing nozzle and an igniter, one end of the natural gas output pipe is connected to the output end of the natural gas storage tank, the flow control valve is installed on the natural gas output pipe, the other end of the natural gas output pipe is arranged on the inner side of the insulation box, the atomizing nozzle is installed on the natural gas output pipe, and the igniter is installed on the insulation box.

[0013] Preferably, the hot air output mechanism includes a heating box, a fan, an electric heating wire and a hot air delivery pipe. The electric heating wire is installed inside the heating box. The output end of the fan is connected to the interior of the heating box. The two ends of the hot air delivery pipe are respectively connected to the interior of the heating box and the steam impeller casing. A second one-way valve is installed on the hot air delivery pipe.

[0014] Preferably, the gas processing mechanism includes a reagent box, a collecting water tank, an exhaust gas output pipe, an external pipe and a drain pipe. The exhaust gas output pipe is connected to the end of the steam impeller casing, and the other end of the exhaust gas output pipe is arranged at the inner bottom end of the reagent box. The external pipe is wrapped around the middle of the exhaust gas output pipe. A cooling chamber with a sealing structure is formed between the external pipe and the exhaust gas output pipe. Interfaces connected to the cooling chamber are installed at both ends of the drain pipe. The drain pipe passes through the external pipe and is connected to the inside of the exhaust gas output pipe. The bottom end of the drain pipe is arranged at the inner bottom end of the collecting water tank.

[0015] Preferably, a "U"-shaped recessed portion is provided on the exhaust gas output pipe, and the external pipe is arranged at the position of the recessed portion.

[0016] Preferably, a first one-way valve is installed on the air intake pipe.

[0017] Preferably, a gas diffuser is arranged just above the output end of the air inlet pipe, and the gas diffuser includes two groups of guide components, the two groups of guide components are arranged perpendicular to each other, and the guide components include multiple air guide plates, and the multiple air guide plates form a fan-shaped skeleton structure.

[0018] Compared with the prior art, the present invention has the following beneficial technical effects: the present invention consumes the oxygen produced by the high-pressure deaerator in advance, thereby greatly reducing the amount of oxygen entering the steam impeller casing, and by preheating the interior of the steam impeller casing in advance, it avoids the large amount of water vapor liquefied inside the steam impeller casing due to the initial temperature inside the steam impeller casing being too low, thereby preventing the steam impeller casing and its internal parts from being rapidly oxidized, thereby extending the service life of the generator set. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 and Figure 2 All of them are structural schematic diagrams of the present invention.

[0020] Figure 3 It is a cross-sectional structural diagram of the heat preservation box in the present invention.

[0021] Figure numerals: 1. high-pressure deaerator; 2. insulation box; 3. heating box; 4. generator body; 41. steam impeller casing; 5. natural gas storage tank; 6. medicine box; 7. collecting water tank; 8. flow control valve; 9. fan; 10. air inlet pipe; 11. air outlet pipe; 12. boiler; 13. hot gas delivery pipe; 14. natural gas output pipe; 141. atomizing nozzle; 15. gas diffuser; 16. igniter; 17. exhaust gas output pipe; 18. external pipe; 19. drain pipe; 20. first one-way valve; 21. second one-way valve; 22. oxygen concentration detection sensor; 231. first solenoid valve; 232. second solenoid valve; 24. connecting pipe. DETAILED DESCRIPTION

[0022] Embodiment 1

[0023] like Figure 1-Figure 3 As shown, the steam waste heat and waste pressure power generation system of a high-pressure deaerator proposed in this embodiment includes an insulation box 2, a steam generator set, a boiler 12, a hot air output mechanism and a gas processing mechanism.

[0024] An air intake pipe 10 is connected between the insulated box 2 and the output end of the high-pressure deaerator 1. A first one-way valve 20 is installed on the air intake pipe 10. The air intake pipe 10 is provided to prevent the gas from flowing back into the interior of the high-pressure deaerator 1. A gas diffuser 15 is provided just above the output end of the air intake pipe 10. The gas diffuser 15 includes two groups of guide components, which are vertically arranged to each other. The guide components include multiple air guide plates, and the multiple air guide plates form a fan-shaped skeleton structure. The gas diffuser 15 can diffuse the gas entering the interior of the insulated box 2, so that the oxygen can be better mixed with the natural gas, ensuring that the oxygen can be fully consumed.

[0025] The steam generator set includes a generator body 4, a steam impeller casing 41 and a steam impeller. The steam impeller casing 41 is installed on the side of the generator body 4, the steam impeller is rotatably installed on the inner side of the steam impeller casing 41, and the rotating shaft of the steam impeller is connected to the rotating shaft of the generator body 4.

[0026] The boiler 12 is installed on the inner side of the heat preservation box 2, and a natural gas combustion device for heating the boiler 12 is installed on the heat preservation box 2. The natural gas combustion device includes a natural gas storage tank 5, a flow control valve 8, a natural gas output pipe 14, an atomizing nozzle 141 and an igniter 16. One end of the natural gas output pipe 14 is connected to the output end of the natural gas storage tank 5, the flow control valve 8 is installed on the natural gas output pipe 14, the other end of the natural gas output pipe 14 is arranged on the inner side of the heat preservation box 2, the atomizing nozzle 141 is installed on the natural gas output pipe 14, and the igniter 16 is installed on the heat preservation box 2; an air outlet pipe 11 is connected to the heat preservation box 2, one end of the air outlet pipe 11 is connected to a connecting pipe 24, and one end of the connecting pipe 24 is connected to the interior of the steam impeller casing 41.

[0027] The hot air output mechanism is used to transport hot air to the interior of the steam impeller housing 41. The hot air output mechanism includes a heating box 3, a fan 9, an electric heating wire and a hot air delivery pipe 13. The electric heating wire is installed inside the heating box 3. The output end of the fan 9 is connected to the interior of the heating box 3. The two ends of the hot air delivery pipe 13 are respectively connected to the interior of the heating box 3 and the steam impeller housing 41. A second one-way valve 21 is installed on the hot air delivery pipe 13.

[0028] The gas treatment mechanism is connected to the end of the steam impeller housing 41 for treating the exhaust gas. The gas treatment mechanism includes a reagent box 6, a collecting water tank 7, an exhaust gas output pipe 17, an external pipe 18 and a drain pipe 19. The exhaust gas output pipe 17 is connected to the end of the steam impeller housing 41. The other end of the exhaust gas output pipe 17 is arranged at the inner bottom end of the reagent box 6. The external pipe 18 is wrapped in the middle of the exhaust gas output pipe 17. A cooling chamber with a sealed structure is formed between the external pipe 18 and the exhaust gas output pipe 17. Interfaces communicating with the cooling chamber are installed at both ends of the drain pipe 19. The drain pipe 19 passes through the external pipe 18 and is connected to the interior of the exhaust gas output pipe 17. The bottom end of the drain pipe 19 is arranged at the inner bottom end of the collecting water tank 7. The output gas enters the interior of the exhaust gas output pipe 17, and the interfaces at both ends are respectively connected to water pipes to transport the gas to the interior of the cooling chamber. Cold water is used to cool a section of the exhaust gas output pipe 17 adjacent to the external pipe 18, thereby accelerating the liquefaction of the gas. The liquefied water flows into the interior of the mobile phone water tank 7 through the drain pipe 19. Water is stored in the mobile phone water tank 7 in advance and the water covers the bottom of the drain pipe 19, thereby preventing the gas that has not been fully treated from being discharged through the drain pipe 19. Finally, the gas flows into the interior of the reagent box 6 through the exhaust gas output pipe 17. Sodium hydroxide solution can be poured into the interior of the reagent box 6 to absorb carbon dioxide. Since the sodium hydroxide solution is highly corrosive, it should be handled with caution. A "U"-shaped recessed portion is provided on the exhaust gas output pipe 17, and the external pipe 18 is provided at the position of the recessed portion. This arrangement can prevent liquefied water from flowing into the interior of the reagent box 6 or the steam impeller casing 41.

[0029] When delivering hot steam to the steam generator set, the fan 9 is first started to work, and the fan 9 delivers the heated hot air inside the heating box 3 to the inside of the steam impeller housing 41, thereby realizing the preliminary preheating of the steam impeller housing 41, the steam impeller and other parts. After the preheating work is completed, the hot steam, oxygen and other gases generated by the high-pressure deaerator 1 are delivered to the inside of the insulation box 2. A valve can be installed on the air inlet pipe 10 to control the on-off of the air inlet pipe 10. Then, the hot steam with a higher temperature enters the steam through the outlet pipe 11 and the connecting pipe 24. The interior of the impeller housing 41 is preheated in advance, so that the hot steam just entering the steam impeller housing 41 will not be liquefied in large quantities inside the steam impeller housing 41 due to rapid cooling. In this process, the flow control valve 8 is controlled to open, so that the natural gas in the natural gas storage tank 5 is sprayed out through the atomizing nozzle 141. At the same time, the igniter 16 ignites the natural gas to burn. Among them, natural gas is a clean energy with little pollution. In the process of natural gas combustion, a large amount of oxygen entering the heat preservation box 2 will be consumed, so that the natural gas finally entering the steam impeller housing 41 will not be liquefied in large quantities. The oxygen inside the steam impeller housing 41 is greatly reduced. An oxygen concentration detection sensor is installed on the air inlet pipe 10 to detect the oxygen concentration of the gas just entering the insulation box 2, and the signal is fed back to the controller. The controller adjusts the valve opening of the flow control valve 8 according to the fed-back oxygen concentration. Natural gas will continuously heat the water inside the boiler 12 during the combustion process, and its heat energy is recycled. The generated hot steam still enters the steam impeller housing 41 through the air outlet pipe 11, thereby driving the steam impeller to rotate. A water inlet pipe is connected to the boiler 12 for continuous water supply to the boiler 12, and a valve is installed on the water inlet pipe to control its on and off. In summary, the present invention consumes the oxygen produced by the high-pressure deaerator 1 in advance, thereby greatly reducing the amount of oxygen entering the steam impeller housing 41, and by preheating the steam impeller housing 41 in advance, it is avoided that the water vapor inside the steam impeller housing 41 is liquefied in large quantities due to the excessively low initial temperature inside the steam impeller housing 41, thereby preventing the steam impeller housing 41 and its internal parts from being rapidly oxidized, thereby extending the service life of the generator set.

[0030] Embodiment 2

[0031] like Figure 1 and Figure 2As shown, the present embodiment proposes a steam waste heat and waste pressure power generation system of a high-pressure deaerator. Compared with the first embodiment, in the present embodiment, the other end of the connecting pipe 24 is connected to the insulated box 2, and the first solenoid valve 231 and the second solenoid valve 232 are respectively installed at both ends of the connecting pipe 24. An oxygen concentration detection sensor 22 is installed on the outlet pipe 11. The oxygen concentration detection sensor 22 installed on the outlet pipe 11 can detect the oxygen content in the output gas. When the oxygen content in the gas still exceeds the set range, the controller controls the first solenoid valve 231 to close and controls the second solenoid valve 232 to open, so that the gas carrying oxygen flows back to the interior of the insulated box 2 for re-combustion and consumption.

[0032] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A steam waste heat and waste pressure power generation system of a high-pressure deaerator, characterized in that: include: An insulated box (2), wherein an air inlet pipe (10) is connected between the insulated box (2) and an output end of the high-pressure deaerator (1); A steam generator set, comprising a generator body (4), a steam impeller housing (41) and a steam impeller, wherein the steam impeller housing (41) is mounted on the side of the generator body (4), the steam impeller is rotatably mounted on the inner side of the steam impeller housing (41), and the rotating shaft of the steam impeller is connected to the rotating shaft of the generator body (4); A boiler (12), the boiler (12) being installed inside the heat preservation box (2), a natural gas combustion device for heating the boiler (12) being installed on the heat preservation box (2), an air outlet pipe (11) being connected to the heat preservation box (2), one end of the air outlet pipe (11) being connected to a connecting pipe (24), one end of the connecting pipe (24) being connected to the interior of a steam impeller casing (41); A hot air output mechanism for delivering hot air to the interior of the steam impeller housing (41); A gas treatment mechanism is connected to the end of the steam impeller housing (41) for treating exhaust gas.

2. The steam waste heat and waste pressure power generation system of a high-pressure deaerator according to claim 1, characterized in that: The other end of the connecting pipe (24) is connected to the heat preservation box (2), and a first solenoid valve (231) and a second solenoid valve (232) are respectively installed at both ends of the connecting pipe (24), and an oxygen concentration detection sensor (22) is installed on the air outlet pipe (11).

3. The steam waste heat and waste pressure power generation system of a high-pressure deaerator according to claim 1, characterized in that: The natural gas combustion device comprises a natural gas storage tank (5), a flow control valve (8), a natural gas output pipe (14), an atomizing nozzle (141) and an igniter (16), wherein one end of the natural gas output pipe (14) is connected to the output end of the natural gas storage tank (5), the flow control valve (8) is installed on the natural gas output pipe (14), the other end of the natural gas output pipe (14) is arranged on the inner side of a heat preservation box (2), the atomizing nozzle (141) is installed on the natural gas output pipe (14), and the igniter (16) is installed on the heat preservation box (2).

4. The steam waste heat and waste pressure power generation system of a high-pressure deaerator according to claim 1, characterized in that: The hot air output mechanism comprises a heating box (3), a fan (9), an electric heating wire and a hot air delivery pipe (13); the electric heating wire is installed inside the heating box (3); the output end of the fan (9) is connected to the inside of the heating box (3); the two ends of the hot air delivery pipe (13) are respectively connected to the inside of the heating box (3) and the steam impeller housing (41); and a second one-way valve (21) is installed on the hot air delivery pipe (13).

5. The steam waste heat and waste pressure power generation system of a high-pressure deaerator according to claim 1, characterized in that: The gas treatment mechanism comprises a reagent box (6), a collecting water tank (7), an exhaust gas output pipe (17), an external pipe (18) and a drain pipe (19); the exhaust gas output pipe (17) is connected to the end of the steam impeller housing (41); the other end of the exhaust gas output pipe (17) is arranged at the inner bottom end of the reagent box (6); the external pipe (18) is wrapped around the middle of the exhaust gas output pipe (17); a cooling chamber with a sealed structure is formed between the external pipe (18) and the exhaust gas output pipe (17); interfaces connected to the cooling chamber are installed at both ends of the drain pipe (19); the drain pipe (19) passes through the external pipe (18) and is connected to the inside of the exhaust gas output pipe (17); the bottom end of the drain pipe (19) is arranged at the inner bottom end of the collecting water tank (7).

6. The steam waste heat and waste pressure power generation system of a high-pressure deaerator according to claim 5, characterized in that: A U-shaped recessed portion is provided on the exhaust gas output pipe (17), and the external pipe (18) is arranged at the position of the recessed portion.

7. The steam waste heat and waste pressure power generation system of a high-pressure deaerator according to claim 1, characterized in that: A first one-way valve (20) is installed on the air intake pipe (10).

8. The steam waste heat and waste pressure power generation system of a high-pressure deaerator according to claim 1, characterized in that: A gas diffuser (15) is arranged directly above the output end of the air inlet pipe (10), and the gas diffuser (15) includes two groups of flow guide components, the two groups of flow guide components are arranged vertically to each other, and the flow guide components include a plurality of air guide plates, and the plurality of air guide plates form a fan-shaped skeleton structure.

Images