Waste propellant destruction thermal energy utilization system, method and use

Abstract

The present invention discloses a thermal energy utilization system, method and use for destroying waste propellant, including a waste propellant combustion system for converting the chemical energy of waste propellant into thermal energy; a steam-water system connected to the waste propellant combustion system for transferring the thermal energy to a power generation system; a power generation system connected to the steam-water system for converting the thermal energy into electrical energy and forming a cycle by being connected to the steam-water system; and a thermal energy utilization system connected to the power generation system for converting the thermal energy and forming a cycle by being connected to the steam-water system. The present invention can utilize the large amount of thermal energy released during the destruction and combustion process of waste propellant, avoiding waste of resources.

Description

Technical Field

[0001] The present invention relates to the technical field of waste propellant destruction, and particularly to a waste propellant destruction thermal energy utilization system, method and use. Background Art

[0002] Propellant is a compound or mixture containing an oxidizer and a combustible substance, which can independently carry out chemical reactions and output energy. Its combustion process is accompanied by a large amount of gas and releases a large amount of heat. The combustion of propellant is a self-sustaining combustion to release energy, that is, after ignition, the waste propellant can automatically maintain the combustion process until it is completely burned out. Different ammunition types require different performance propellants, so there are also many types of propellants. When the military disposes of waste ammunition, the amount of waste propellant that can be used for civilian purposes is very small, resulting in a large backlog in inventory and posing a great danger.

[0003] Currently, the main methods for destroying waste propellant are: burning method, blasting method, dissolving method and chemical decomposition method. For the situation where the inventory of waste propellant is large and there are many types, furnace incineration is an effective and relatively general destruction method. Its advantage is that it can completely incinerate the waste propellant without leaving hidden dangers and can control the entire incineration process. Its disadvantage is that currently, furnace incineration does not utilize the large amount of thermal energy released during its combustion process, resulting in a problem of resource waste. Summary of the Invention

[0004] The present invention provides a waste propellant destruction thermal energy utilization system, method and use, which can make full use of the thermal energy generated during the combustion of waste propellant.

[0005] To achieve the above object, the technical solutions adopted by the present invention are as follows:

[0006] A waste propellant destruction thermal energy utilization system, comprising:

[0007] A waste propellant combustion system for converting the chemical energy of waste propellant into thermal energy;

[0008] A steam-water system connected to the waste propellant combustion system for transferring thermal energy to the power generation system;

[0009] A power generation system connected to the steam-water system for converting thermal energy into electrical energy and forming a cycle with the steam-water system;

[0010] A thermal energy utilization system connected to the power generation system for converting thermal energy and forming a cycle with the steam-water system.

[0011] Optionally, the spent propellant combustion system includes a spent propellant combustion boiler and a water wall provided on the outer wall of the spent propellant combustion boiler for containing a heat transfer working medium. The water wall is connected to the steam-water system. The spent propellant combustion boiler has a combustion chamber for incinerating spent propellant, a slag discharge device connected to the combustion chamber, and a flue gas passage communicating with the combustion chamber. An explosion-proof air and flue gas baffle is provided in the flue gas passage, and a flue gas treatment device is also connected to the tail end thereof;

[0012] It further includes a spent propellant crushing and feeding device and an auxiliary fuel feeding device respectively provided at the upper and lower parts of the spent propellant combustion boiler. The spent propellant combustion boiler is also connected to an air distribution system.

[0013] The air distribution system includes: a primary air system and a secondary air system respectively provided below the spent propellant crushing and feeding device and the auxiliary fuel feeding device. The primary air and the secondary air are sent to the spent propellant combustion boiler through the primary air fan baffle of the primary air system and the secondary air fan baffle of the secondary air system;

[0014] It further includes an induced draft fan provided at the upper part of the spent propellant combustion boiler. The induced draft fan sends the flue gas in the combustion chamber to the flue gas treatment device through the induced draft fan baffle.

[0015] Optionally, the steam-water system includes a steam drum. The spent propellant combustion boiler forms a steam-water mixture of the liquid heat transfer working medium in the water wall and sends it into the steam drum. The water wall is connected to a feed water pump for circulating the heat transfer working medium. The steam drum is communicated with a superheater, and the superheater is communicated with a reheater. The steam drum sends the steam formed after separating the steam-water mixture into the superheater and transmits it to the power generation system through the reheater. A part of the superheater and the reheater is provided in the flue gas passage.

[0016] Optionally, the power generation system includes a steam turbine and a generator connected to the steam turbine. The steam turbine is used to receive the steam transmitted by the reheater. The steam does work on the steam turbine, converting the thermal energy of the steam into mechanical energy, and transmits the steam that has done work to the thermal energy utilization system through a working medium pipe. After being reused by the thermal energy utilization system, the steam is transmitted to a condenser. The condenser is used to condense the steam that has done work into a liquid state, and then transmits it to the feed water pump through a deaerator. The generator is used to convert mechanical energy into electrical energy. The electrical energy generated by the generator is transmitted in two paths. One path is supplied for in-plant power consumption, and the other path is connected to the power grid.

[0017] Optionally, the thermal energy utilization system includes a desuperheater, a refrigerator, and a heat network heat exchanger that are respectively connected to the steam turbine through working fluid pipes. The desuperheater adjusts the steam that has completed work to the required temperature and pressure and then converts it into usable plant steam. The refrigerator generates cold water available for the factory from the steam that has completed work. The heat network heat exchanger supplies the steam that has completed work as a heat source for heating by heat users.

[0018] Optionally, the heat network heat exchanger is connected to a heat network supply water pipeline and a heat network return water pipeline. The heat network supply water pipeline transports the hot water after heat exchange by the heat network heat exchanger to the heat users. The heat network return water pipeline returns the water that has completed heating to the heat network heat exchanger for circulating heat exchange. A heat network circulating water pump is provided on the heat network supply water pipeline.

[0019] Optionally, a heat network heating system is further provided on the heat network supply water pipeline. The heat network supply water pipeline includes a main road supply water pipeline and a secondary road supply water pipeline. The heat network heating system includes a heat network main road valve, a heat network secondary road valve, and a heat network heater. The heat network main road valve is provided on the main road supply water pipeline. The heat network secondary road valve and the heat network heater are provided on the secondary road supply water pipeline.

[0020] Optionally, the combustion chamber of the waste propellant combustion boiler, the steam drum, the waste propellant crushing and feeding device, and the auxiliary fuel feeding device are all arranged in an explosion-proof workshop.

[0021] A method for utilizing the thermal energy of waste propellant destruction includes the following steps:

[0022] Step 1: Crush the waste propellant through the waste propellant crushing and feeding device;

[0023] Step 2: Start the waste propellant combustion boiler, send the auxiliary fuel to the waste propellant combustion boiler, ignite and introduce primary air and secondary air, and at the same time start the induced draft fan;

[0024] Step 3: When reaching the predetermined temperature or flame intensity, feed the waste propellant into the waste propellant combustion boiler through the waste propellant crushing and feeding device for incineration. At the same time, reduce the introduction amount of primary air and secondary air. The heat generated by incineration vaporizes the liquid heat transfer working medium in the water wall to form a steam-water mixture;

[0025] Step 4: Send the steam-water mixture into the steam drum for steam-water separation. The steam separated from the water passes through the superheater and the reheater in sequence to form superheated steam;

[0026] Step 5: Send the superheated steam to the steam turbine. The superheated steam drives the rotor of the steam turbine to rotate and do work, driving the generator to generate electricity;

[0027] Step 6: Divide the completed steam into four paths for heat and working medium recovery and utilization: The first path enters a desuperheating and pressure-reducing valve to adjust the steam to the required temperature and pressure and convert it into usable plant steam; the second path enters a refrigerant to generate cold water usable in the plant from the steam; the third path enters a heat network heat exchanger to use the steam as a heat source to supply heat to heat users; the fourth path enters a condenser, where the steam is condensed into a liquid heat transfer working medium, which is then sent to a deaerator to remove oxygen from the liquid working medium, and the liquid working medium after oxygen removal is sent to a water wall by a feed water pump to form a steam-water cycle.

[0028] Use the heat energy generated by the combustion of expired propellant. The heat energy generated by the combustion of expired propellant is used as a heat source for power generation and / or heating heat users.

[0029] Compared with the prior art, the technical progress achieved by the present invention is as follows:

[0030] Because a large amount of heat is released during the combustion process of expired propellant, after ignition, the expired propellant can automatically maintain the combustion process until it is completely burned out. The present invention can convert the chemical energy of expired propellant into heat energy by setting up an expired propellant combustion system, and use the above heat energy as a heat source for power generation and / or heating heat users, making full use of the heat energy generated by the destruction of expired propellant. Among them, the expired propellant combustion system has an expired propellant crushing and feeding device, an auxiliary fuel feeding device, and an explosion-proof air and smoke baffle, which ensure the full combustion of expired propellant and the safe operation of the entire unit in cooperation with the air distribution system.

[0031] The steam-water system can transfer the heat energy generated by expired propellant to the power generation system through the heat transfer working medium. The power generation system uses the gaseous working medium to generate electricity, and the generated electric energy can be used in the plant or the power grid. The heat energy after doing work can also be reused through the heat energy utilization system: adjust the gaseous working medium to the required temperature and pressure to convert it into usable plant steam; generate cold water usable in the plant from the gaseous working medium; use the gaseous working medium as a heat source to supply heat to heat users; the gaseous working medium is condensed into a liquid working medium in the condenser, and then a steam-water cycle is formed. Therefore, through the present invention, the chemical energy of expired propellant can be fully utilized, avoiding waste of resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings are used to provide a further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention, and do not constitute a limitation to the present invention.

[0033] In the drawings:

[0034] Figure 1 is the overall schematic diagram of the present invention.

[0035] In the figure:

[0036] 1. Waste propellant combustion boiler; 2. Steam drum; 3. Superheater; 4. Reheater; 5. Steam turbine; 6. Generator; 7. Flameproof workshop; 8. Flameproof air and flue gas baffle; 9. Primary air fan baffle; 10. Secondary air fan baffle; 11. Induced draft fan baffle; 12. Induced draft fan; 13. Waste propellant crushing and feeding device; 14. Auxiliary fuel feeding device; 15. Feed water pump; 16. Deaerator; 17. Condenser; 18. Desuperheater and pressure reducer; 19. Refrigerator; 20. Heat network heat exchanger; 21. Heat network circulating water pump; 22. Heat network heater; 23. Heat user; 24. Main heat network line valve; 25. Auxiliary heat network line valve; 26. Slag discharging device; 27. Water wall; 28. First branch pipe; 29. Second branch pipe. Detailed implementation manners

[0037] The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0038] As Figure 1 shown, the present invention discloses a waste propellant destruction heat energy utilization system, method and use. Propellant is a compound or mixture containing an oxidizer and a combustible substance, which can independently carry out chemical reactions and output energy. A large amount of gas is generated during its combustion process and a large amount of heat is released. Therefore, the heat energy generated by the combustion of waste propellant can be used as a heat source for power generation and / or heating of heat users. Specifically, it includes:

[0039] A waste propellant combustion system, which is used to convert the chemical energy of waste propellant into heat energy through combustion; a steam-water system, which is connected to the waste propellant combustion system. The heat energy released by the combustion of the waste propellant combustion system evaporates the liquid heat transfer medium. In the present invention, water is used as the heat transfer medium. The liquid water evaporates to form steam, and the heat energy of the steam is transferred to the power generation system; a power generation system, which is connected to the steam-water system, enables the steam to do work and converts the heat energy of the steam into electrical energy for use in the factory or grid-connected to the power grid; a heat energy utilization system, which is connected to the power generation system. Because the steam after doing work still has a very high temperature and pressure, the steam after doing work can be reused in the heat energy utilization system. For example: heating the heat user 23 through a working medium pipe; as a heat source, being converted into usable factory steam after desuperheating and pressure reduction; generating cold water available for the factory.

[0040] The heat energy utilization system is connected to the steam-water system, and the steam is condensed into liquid water, and the water is sent into the steam-water system to form a steam cycle.

[0041] Specifically, as Figure 1As shown in the figure, the waste propellant combustion system includes a waste propellant combustion boiler 1 and a water wall 27 for containing a heat transfer working medium, which is arranged on the outer wall of the waste propellant combustion boiler 1. The waste propellant combustion boiler 1 has a combustion chamber for burning waste propellant, a slag discharging device 26 connected to the combustion chamber, and a flue gas passage communicating with the combustion chamber. In the combustion chamber, the heat energy generated by the combustion of waste propellant turns liquid water into a steam-water mixture. A flameproof air and flue gas baffle 8, which is normally open in the normal working state of the system, is arranged in the flue gas passage. The tail end of the flue gas passage is connected with a flue gas treatment device, and the flue gas treatment device filters and purifies the flue gas generated by the combustion of waste propellant in the combustion chamber.

[0042] A waste propellant crushing and feeding device 13 and an auxiliary fuel feeding device 14 are arranged on the side of the waste propellant combustion boiler 1. The waste propellant crushing and feeding device 13 is arranged above one side of the waste propellant combustion boiler 1, and the waste propellant is sent to the combustion chamber for combustion through the waste propellant crushing and feeding device 13. The auxiliary fuel feeding device 14 is arranged below one side of the waste propellant combustion boiler 1, and the auxiliary fuel is sent to the combustion chamber for combustion through the auxiliary fuel feeding device 14.

[0043] During operation, first, the auxiliary fuel is sent to the combustion chamber through the auxiliary fuel feeding device 14 and ignited, so that the combustion chamber is in a high-temperature or flame-covered state. When the predetermined temperature or flame intensity is reached, the waste propellant is then sent to the boiler through the waste propellant crushing and feeding device 13, so that the waste propellant explodes and burns in the combustion chamber. In order to make the auxiliary fuel burn more fully and ensure the normal furnace pressure of the combustion chamber, the waste propellant combustion boiler 1 is also connected with a air distribution system.

[0044] The air distribution system includes a primary air system and a secondary air system, which are respectively arranged below the waste propellant crushing and feeding device 13 and the auxiliary fuel feeding device 14. The primary air and the secondary air are sent to the waste propellant combustion boiler 1 through the primary air fan baffle 9 of the primary air system and the secondary air fan baffle 10 of the secondary air system.

[0045] The primary air mainly plays the role of providing oxygen required for the combustion of the auxiliary fuel. Because the primary air system is arranged below the auxiliary fuel feeding device 14, there is an upward blowing force on the auxiliary fuel put into the combustion chamber, which can make the auxiliary fuel fill the entire combustion chamber faster, accelerate the temperature rise, and make the combustion chamber in a high-temperature or flame-covered state. For the above purpose, the auxiliary fuel of the present invention is preferably light diesel. The secondary air mainly provides oxygen for the combustion in the middle section of the combustion chamber, provides a driving force for the large amount of gas generated during the combustion of waste propellant, accelerates the gas circulation, and can also make the auxiliary fuel burn more fully and improve the utilization rate of the auxiliary fuel.

[0046] It also includes a induced draft fan 12 installed above the waste propellant combustion boiler 1. The induced draft fan 12 sends the flue gas in the combustion chamber to the flue gas treatment device through the induced draft fan baffle 11. The main function of induced draft is to adjust the pressure in the furnace of the combustion chamber and ensure that the furnace pressure is within a safe range. The primary air fan baffle 9, the secondary air fan baffle 10 and the induced draft fan baffle 11 can all prevent reverse air flow, so they play a role in controlling the unidirectional flow of air.

[0047] The steam-water system includes a steam drum 2. The steam drum 2 is connected to the water wall 27. The waste propellant combustion boiler 1 transfers heat energy to the water wall 27 in the form of thermal radiation. The steam-water mixture generated by the evaporation of the water in the water wall 27 enters the steam drum 2. The water wall 27 is connected with a feed water pump 15 for circulating the working medium, and the liquid working medium can be sent into the steam drum 2 to separate the steam and water mixture in the steam drum 2 to form steam.

[0048] The steam drum 2 is also connected to a superheater 3 and a reheater 4. The steam drum 2 sends the steam separated from the water through the superheater 3 and the reheater 4 in sequence. After passing through the superheater 3 and the reheater 4, the steam is heated and pressurized to form superheated steam (540 °C), and then the superheated steam is transmitted to the power generation system through the working medium pipe.

[0049] In order to make full use of the heat energy generated by the combustion of waste propellant, a part of the superheater 3 and the reheater 4 is arranged in the flue gas passage. The flue gas extracted from the flue gas passage also carries a certain amount of heat. The flue gas passing through the superheater 3 and the reheater 4 can make more full use of the heat energy generated by the combustion of waste propellant.

[0050] The power generation system includes a steam turbine 5 and a generator 6 connected to the steam turbine 5. The steam turbine 5 receives the superheated steam transmitted by the reheater 4 through the working medium pipe. The superheated steam pushes the rotor of the steam turbine 5 to rotate and do work on the steam turbine 5, converting the heat energy of the superheated steam into mechanical energy. The rotation of the rotor of the steam turbine 5 drives the generator 6 to rotate, and the generator 6 converts the mechanical energy into electrical energy. The generated electrical energy is transmitted in two ways. One way is supplied for in-plant power consumption, and the other way is connected to the power grid.

[0051] The steam that has done work still has a very high temperature and pressure, so the steam can be reused through the heat energy utilization system. After utilization, the steam is transmitted to the condenser 17. The condenser 17 is used to condense the steam into a liquid state, and then the oxygen is removed by the deaerator 16 and supplied to the water wall 27 by the feed water pump 15 to form a steam-water cycle.

[0052] Specifically, the heat energy utilization system includes a desuperheater 18, a refrigerating machine 19, and a heat network heat exchanger 20 that are respectively connected to a steam turbine 5 through working fluid pipes. The desuperheater 18 can adjust the steam that has completed work to the required temperature and pressure and then convert it into usable plant steam. For example, the steam that has completed work is supplied to the factory cafeteria by means of desuperheating by spraying water and expanding and reducing pressure, etc. The refrigerating machine 19 can generate cold water usable by the factory from the steam that has completed work, and the electric energy of the refrigerating machine 19 can use the electric energy generated by the power generation system. The heat network heat exchanger 20 can supply the steam that has completed work as a heat source for heating the heat user 23. Among them, valves can be added in front of the desuperheater 18 and the refrigerating machine 19. When the weather is cold and the heat generated by the burning of the scrapped propellant is insufficient, the valves in front of the desuperheater 18 and the refrigerating machine 19 are closed, and the steam that has completed work is allowed to pass only through the heat network heat exchanger 20 to ensure the heating of the heat user 23. Or, when the weather is hot and the heat user 23 no longer needs heating, the heat network heat exchanger 20 is closed, and the heat network heat exchanger 20 no longer conducts heat exchange, allowing the steam to directly pass through and be transmitted to the condenser 17 for circulation.

[0053] Preferably, it further includes a first branch pipe 28 and a second branch pipe 29. The first branch pipe 28 is arranged at both ends of the power generation system, and the second branch pipe 29 is arranged at both ends of the heat energy utilization system. Both the first branch pipe 28 and the second branch pipe 29 are equipped with valves.

[0054] When the heat generated by the scrapped propellant is sufficient or power generation is required, the valves on the first branch pipe 28 and the second branch pipe 29 are closed, and the superheated steam is allowed to do work through the power generation system and then be transmitted to the heat energy utilization system.

[0055] When the burning of the scrapped propellant is unstable, the valve on the first branch pipe 28 is opened, and the valve on the second branch pipe 29 is closed, so that the superheated steam transmitted from the reheater 4 is directly transmitted to the heat energy utilization system to ensure the heating of the heat user 23.

[0056] The heat network heat exchanger 20 is connected to a heat network water supply pipeline and a heat network water return pipeline. Through the heat network circulation pump 21 provided on the heat network water supply pipeline, the heat network water supply pipeline transports the hot water after heat exchange by the heat network heat exchanger 20 to the heat user 23, and the heat network water return pipeline returns the water that has completed heating to the heat network heat exchanger 20 for circulating heat exchange.

[0057] To ensure the heating demand, when the combustion of the scrapped propellant is unstable, the heat load can be adjusted through the heat network heating system to improve the heating efficiency. The heat network water supply pipeline is set as the main water supply pipeline and the auxiliary water supply pipeline. The heat network heating system includes a main heat network valve 24, an auxiliary heat network valve 25, and a heat network heater 22. The main heat network valve 24 is set on the main water supply pipeline, and the auxiliary heat network valve 25 and the heat network heater 22 are set on the auxiliary water supply pipeline. Usually, the heat network heater 22 and the auxiliary heat network valve 25 are in the closed state, and the main heat network valve 24 is in the open state. When the combustion of the scrapped propellant is unstable and the heating water temperature cannot meet the needs of the heat user 23, the heat network heater 22 and the auxiliary heat network valve 25 are opened, and the main heat network valve 24 is closed. The heating water is reheated to the required temperature through the heat network heater 22 and then sent to the heat user 23. Among them, the heat network heater 22 can be provided by the electric energy generated by the power generation system.

[0058] In the present invention, to prevent accidents, the combustion chamber, the steam drum 2, the scrapped propellant pulverizing and feeding device 13, and the auxiliary fuel feeding device 14 of the scrapped propellant combustion boiler 1 are all set in the explosion-proof workshop 7. An explosion-proof air and flue gas baffle 8 is provided in the flue gas passage. The explosion-proof air and flue gas baffle 8 can be urgently closed in case of an accident to separate the superheater 3 and the reheater 4 in time. If an explosion occurs to the scrapped propellant in the scrapped propellant combustion boiler 1, the explosion-proof workshop 7 and the explosion-proof air and flue gas baffle 8 can form a closed area to prevent the spread of flames, auxiliary fuel, and scrapped propellant, and will not cause the detonation of a large amount of scrapped propellant and auxiliary fuel, effectively controlling the explosion range and ensuring safety and economy.

[0059] In actual operation, the furnace pressure of the combustion chamber is a key indicator for safe and normal operation. One of the functions of the secondary air system and the induced draft fan 12 set in the present invention is to adjust the furnace pressure of the combustion chamber. Specifically, the present invention also includes a control system. The control system of the present invention includes a furnace pressure sensor for detecting the pressure in the furnace. The control system also includes a controller connected to the furnace pressure sensor. The furnace pressure sensor transmits the pressure signal to the controller, and the controller is also electrically connected to the scrapped propellant combustion system, the steam-water system, the power generation system, and the air distribution system.

[0060] Two pressure thresholds can be set in the controller. For example, when the pressure signal transmitted by the furnace pressure sensor to the processor exceeds one of the pressure thresholds, the controller controls the secondary air system of the air distribution system to reduce the air intake, and at the same time controls the induced draft fan 12 to increase the exhaust air volume, and uses this method to lower the furnace pressure of the combustion chamber; when the pressure signal transmitted by the furnace pressure sensor to the processor exceeds the other pressure threshold, at this time the controller controls the steam-water system and the power generation system to shut down, and the controller controls the explosion-proof air and smoke baffle 8 of the waste propellant combustion system to quickly drop, closing the entire combustion chamber to ensure personal safety. Among them, the explosion-proof air and smoke baffle 8 is always in the normally open state during the normal operation of the unit, so that the flue gas generated by combustion in the combustion chamber can be sent to the flue gas treatment device for dust removal and purification. Among them, the controller can choose dual control of electric and pneumatic valves to control the explosion-proof air and smoke baffle 8 of the waste propellant combustion system, to avoid the situation that the explosion-proof air and smoke baffle 8 cannot be closed due to a single control failure. Because the pneumatic valve closes faster, the pneumatic valve control is the main control method in this system.

[0061] In order to supplement the recycled water, the present invention can set a water source between the condenser 17 and the deaerator 16 to supply water to the system.

[0062] The present invention discloses a method for destroying waste propellant, which is as follows:

[0063] Step 1: Crush the waste propellant through the waste propellant crushing and feeding device 13;

[0064] Step 2: Start the waste propellant combustion boiler 1, send the auxiliary fuel to the waste propellant combustion boiler 1, ignite and introduce the primary air and secondary air, and at the same time start the induced draft fan;

[0065] Step 3: When the predetermined temperature or flame intensity is reached, send the waste propellant into the waste propellant combustion boiler 1 through the waste propellant crushing and feeding device 13 for incineration. At the same time, introduce secondary air into the waste propellant combustion boiler 1, and the heat generated by the incineration vaporizes the heat transfer working medium in the water wall 27 to generate a steam-water mixture;

[0066] Step 4: Send the steam-water mixture into the steam drum 2 for steam-water separation, and the steam separated from the water passes through the superheater 3 and the reheater 4 in sequence to form superheated steam;

[0067] Step 5: Send the superheated steam to the steam turbine 5, and the superheated steam drives the rotor of the steam turbine 5 to rotate and do work, driving the generator 6 to generate electricity;

[0068] Step 6: Divide the completed steam into four paths for heat and water recovery and utilization respectively: The first path enters the desuperheating and pressure-reducing valve 18 to adjust the steam to the required temperature and pressure and convert it into usable plant steam; the second path enters the refrigerant to generate cold water available in the plant from the steam; the third path enters the heat network heat exchanger 20 to supply heat to the heat user 23 with the steam as the heat source; the fourth path enters the condenser 17, where the steam is condensed into a liquid heat transfer medium, and then sent to the deaerator 16 to remove the oxygen in the water. The water after removing the oxygen is sent to the water wall 27 by the feed water pump 15 to form a steam-water cycle.

[0069] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Waste propellant destruction thermal energy utilization system, characterized in that, Comprising: A spent propellant combustion system for converting the chemical energy of spent propellant into heat energy; the spent propellant combustion system includes a spent propellant combustion boiler and a water-cooled wall provided on the outer wall of the spent propellant combustion boiler for containing a heat transfer working medium, the water-cooled wall is connected to a steam-water system, the spent propellant combustion boiler has a combustion chamber for burning spent propellant, a slag discharge device connected to the combustion chamber, and a flue gas passage communicating with the combustion chamber, an explosion-proof air and flue gas baffle is provided in the flue gas passage, and a flue gas treatment device is also connected to its tail end; it also includes a spent propellant crushing and feeding device and an auxiliary fuel feeding device respectively provided at the upper and lower parts of the spent propellant combustion boiler, the spent propellant combustion boiler is also connected to a air distribution system, the air distribution system includes a primary air system and a secondary air system respectively provided below the spent propellant crushing and feeding device and the auxiliary fuel feeding device, the primary air and the secondary air send air to the spent propellant combustion boiler through a primary air fan baffle of the primary air system and a secondary air fan baffle of the secondary air system, and an induced draft fan is also provided at the upper part of the spent propellant combustion boiler, the induced draft fan sends the flue gas in the combustion chamber to the flue gas treatment device through an induced draft fan baffle; A steam-water system, connected to the spent propellant combustion system, for transferring heat energy to a power generation system; A power generation system, connected to the steam-water system, for converting heat energy into electrical energy and forming a cycle by connecting to the steam-water system; A heat energy utilization system, connected to the power generation system, for converting heat energy and forming a cycle by connecting to the steam-water system; A control system, the control system includes a furnace pressure sensor for detecting the pressure in the furnace, the control system also includes a controller, the controller is connected to the furnace pressure sensor, the furnace pressure sensor transmits a pressure signal to the controller, and the controller is also electrically connected to the spent propellant combustion system, the steam-water system, the power generation system and the air distribution system; The combustion chamber of the spent propellant combustion boiler, the steam-water system, the spent propellant crushing and feeding device and the auxiliary fuel feeding device are all arranged in an explosion-proof workshop.

2. The waste propellant destruction heat energy utilization system according to claim 1, wherein: The steam-water system includes a steam drum, the spent propellant combustion boiler forms a steam-water mixture of the liquid heat transfer working medium in the water-cooled wall and enters the steam drum, the water-cooled wall is connected with a feed water pump for circulating the heat transfer working medium, the steam drum is communicated with a superheater, the superheater is communicated with a reheater, the steam formed after the steam-water separation of the steam-water mixture by the steam drum is sent into the superheater and transmitted to the power generation system through the reheater, and a part of the superheater and the reheater is arranged in the flue gas passage.

3. The waste propellant destruction heat energy utilization system according to claim 2, wherein: The power generation system includes a steam turbine and a generator connected to the steam turbine. The steam turbine is used to receive the steam transmitted by the reheater. The steam does work on the steam turbine, converting the thermal energy of the steam into mechanical energy, and the steam that has done work is transmitted to the thermal energy utilization system through a working medium pipe. After being reused by the thermal energy utilization system, the steam is transmitted to the condenser. The condenser is used to condense the steam that has done work into a liquid state, and then it is transmitted to the feed water pump through a deaerator. The generator is used to convert mechanical energy into electrical energy. The electrical energy generated by the generator is transmitted in two paths. One path supplies the in-plant power consumption, and the other path is connected to the power grid.

4. The waste propellant destruction heat energy utilization system according to claim 3, wherein: The thermal energy utilization system includes a desuperheater, a refrigerator, and a heat exchanger for the heat network, which are respectively connected to the steam turbine through a working medium pipe. The desuperheater adjusts the steam that has done work to the required temperature and pressure and then converts it into usable in-plant steam. The refrigerator generates cold water available for the factory from the steam that has done work. The heat exchanger for the heat network supplies heat to heat users by using the steam that has done work as a heat source.

5. The waste propellant destruction thermal energy utilization system according to claim 4, characterized in that: The heat exchanger for the heat network is connected to a heat network supply water pipeline and a heat network return water pipeline. The heat network supply water pipeline transports the hot water after heat exchange by the heat exchanger for the heat network to heat users. The heat network return water pipeline returns the water that has supplied heat to the heat exchanger for the heat network for circulating heat exchange. A heat network circulating water pump is provided on the heat network supply water pipeline.

6. The waste propellant destruction thermal energy utilization system according to claim 5, wherein: A heat network heating system is also provided on the heat network supply water pipeline. The heat network supply water pipeline includes a main supply water pipeline and a secondary supply water pipeline. The heat network heating system includes a heat network main road valve, a heat network secondary road valve, and a heat network heater. The heat network main road valve is arranged on the main supply water pipeline, and the heat network secondary road valve and the heat network heater are arranged on the secondary supply water pipeline.

7. Thermal energy use for the destruction of expired propellant, applied to the thermal energy utilization system for the destruction of expired propellant according to any one of claims 1 to 6, characterized in that: The thermal energy generated by burning the waste propellant is used as a heat source for power generation and / or heating heat users.

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