High-pressure flash evaporation black water pressure-stabilizing heat utilization system and method

Abstract

The invention provides a stable-pressure heat utilization system and method for high-pressure flash evaporation black water, and belongs to the technical field of coal gasification preparation.The high-temperature gasified black water at 230-260 DEG C is subjected to high-pressure flash evaporation, and high-temperature black water at the first preset temperature is obtained; the high-temperature black water at the first preset temperature and the heating medium water at the second preset temperature are subjected to heat exchange, and low-temperature black water at the third preset temperature and heating medium water at the fourth preset temperature are obtained; sequentially carrying out medium-pressure flash evaporation and low-pressure flash evaporation on the low-temperature black water at the third preset temperature; the heat medium water at the fourth preset temperature serves as a heat source of the heat trap, heat of the high-temperature black water at the first preset temperature after high-pressure flash evaporation is exchanged out through the heat medium water, and the heat medium water after heat exchange is used for the heat using island, so that the heat of the black water is comprehensively utilized, heat loss is reduced, and more energy conservation and environmental protection are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of coal gasification preparation, and in particular relates to a high-pressure flash black water pressure stabilization heat utilization system and method. Background Art

[0002] The coal chemical gasification process generally uses a water-coal slurry gasifier or a pulverized coal gasifier. During the cooling and washing process of coal gasification, high-temperature gasification washing water of 230℃-260℃ is formed, namely, gasification washing black water. The black water needs to be cooled to below 60℃ for clarification before reuse.

[0003] In the prior art, the high-temperature gasified black water of 230℃-260℃ is cooled to below 60℃ through the process of high-pressure, low-pressure and vacuum three-stage flash evaporation and heat exchange cooling in the final stage heat exchanger. Among them, the temperature of the black water is reduced to about 130℃ after high-pressure and low-pressure flash evaporation, and the black water from the high-pressure flash evaporator directly enters the low-pressure flash evaporator for flash evaporation. The black water temperature is high, resulting in heat waste. Summary of the invention

[0004] In view of this, the present invention provides a method for stabilizing heat utilization of high-pressure flash black water to prevent heat waste.

[0005] It is also necessary to provide a high-pressure flash black water pressure-stabilizing heat utilization system.

[0006] A method for utilizing high-pressure flash black water with constant pressure heat comprises the following steps: S1: High-temperature gasified black water at 230° C.-260° C. is subjected to high-pressure flash evaporation to obtain high-temperature black water at a first predetermined temperature; S2: exchanging heat between the high-temperature black water at the first predetermined temperature and the heat medium water at the second predetermined temperature to obtain low-temperature black water at the third predetermined temperature and heat medium water at the fourth predetermined temperature; S3: performing medium-pressure flash evaporation and low-pressure flash evaporation on the low-temperature black water at the third predetermined temperature in sequence; The heat medium water at the fourth predetermined temperature is used as a heat source of the heat sink to achieve heat utilization.

[0007] Preferably, in the step S2, the high-temperature black water at the first predetermined temperature is firstly pressure-stabilized, and then heat-exchanged with the heat medium water at the second predetermined temperature after the pressure of the high-temperature black water at the first predetermined temperature is stabilized.

[0008] Preferably, the pressure of the high-temperature black water at the first predetermined temperature is stabilized to below 1.0 MPa.

[0009] Preferably, the first predetermined temperature is 165°C to 185°C, the second predetermined temperature is 70°C to 100°C, the third predetermined temperature is 125°C to 105°C, and the fourth predetermined temperature is 115°C to 140°C.

[0010] The high-pressure flash black water stabilization heat utilization method as described above adopts a high-pressure flash black water stabilization heat utilization system, the high-pressure flash black water stabilization heat utilization system includes a black water cooling unit and a heat recovery unit, the black water cooling unit includes a high-pressure flash evaporator, a low-pressure flash evaporator, and a vacuum flash evaporator, the heat recovery unit includes a first heat utilization part and a second heat utilization part, the first heat utilization part includes a heat exchange unit, a heat island, a buffer tank, and a circulating pump, the bottom outlet of the high-pressure flash evaporator is connected to the black water inlet of the heat exchange unit, the heat exchange unit The black water outlet is connected to the inlet of the low-pressure flash evaporator, the bottom outlet of the low-pressure flash evaporator is connected to the inlet of the vacuum flash evaporator, the heat medium water outlet of the heat exchanger is connected to the inlet of the heat island, the outlet of the heat island is connected to the inlet of the buffer tank, the outlet of the buffer tank is connected to the inlet of the circulation pump, the outlet of the circulation pump is connected to the heat medium water inlet of the heat exchanger, and the inlet of the second heat utilization part is respectively connected to the flash gas outlets of the high-pressure flash evaporator and the low-pressure flash evaporator to fully utilize the heat of the black water.

[0011] Preferably, the first heat utilization part also includes a decompression tank, the inlet of the decompression tank is connected to the bottom outlet of the high-pressure flash evaporator, the bottom outlet of the decompression tank is connected to the inlet of the heat exchange unit, and the top outlet of the decompression tank is connected to the outlet of the low-pressure flash evaporator.

[0012] Preferably, the heat exchange unit comprises at least one heat exchanger.

[0013] Preferably, the heat exchanger is a plate heat exchanger.

[0014] Preferably, the second heat utilization part comprises a stripping tower and a deaeration water tank, the inlet of the stripping tower is connected to the flash gas outlet of the high-pressure flash evaporator, and the inlet of the deaeration water tank is connected to the flash gas outlet of the low-pressure flash evaporator.

[0015] Preferably, the heat island is one or more of a heating user, a hot water refrigeration unit, a hot water generator unit, a heat regeneration tower reboiler, and a deaerator.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The high-pressure flash black water stabilizing heat utilization method of the present invention performs high-pressure flash on high-temperature gasified black water of 230°C-260°C to obtain high-temperature black water of a first predetermined temperature; performs heat exchange on the high-temperature black water of the first predetermined temperature and heat medium water of a second predetermined temperature to obtain low-temperature black water of a third predetermined temperature and heat medium water of a fourth predetermined temperature; performs medium-pressure flash evaporation and low-pressure flash evaporation on the low-temperature black water of the third predetermined temperature in sequence; uses the heat medium water of the fourth predetermined temperature as a heat source for a heat sink, so as to exchange the heat of the high-temperature black water of the first predetermined temperature after high-pressure flash evaporation through the heat medium water, and uses the heat medium water after heat exchange at a heat island, so that the heat of the black water is fully utilized, the heat loss is reduced, and it is more energy-saving and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the process flow chart of the high-pressure flash black water pressure stabilization heat utilization system.

[0018] Figure 2 Schematic diagram of heat exchanger equipment.

[0019] In the figure: high-pressure flash black water pressure stabilizing heat utilization system 10, black water cooling unit 100, high-pressure flash evaporator 110, low-pressure flash evaporator 120, vacuum flash evaporator 130, delivery pump 140, gray water tank 150, heater 160, heat recovery unit 200, first heat utilization part 210, heat exchange unit 211, first electric valve 2111, second electric valve 2112, third electric valve 2113, fourth electric valve 2114, heat island 212, buffer tank 213, nitrogen inlet pipe 2131, vent pipe 2132, water supply pipe 2133, circulation pump 214, heat island center system 215, pressure reduction tank 216, second heat utilization part 220, stripping tower 221, deoxygenation water tank 222. DETAILED DESCRIPTION

[0020] The technical solutions and technical effects of the embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings of the present invention.

[0021] Please see Figure 1 A method for utilizing high-pressure flash black water with constant pressure heat comprises the following steps: S1: High-temperature gasified black water at 230° C.-260° C. is subjected to high-pressure flash evaporation to obtain high-temperature black water at a first predetermined temperature; S2: exchanging heat between the high-temperature black water at the first predetermined temperature and the heat medium water at the second predetermined temperature to obtain low-temperature black water at the third predetermined temperature and heat medium water at the fourth predetermined temperature; S3: performing medium-pressure flash evaporation and low-pressure flash evaporation on the low-temperature black water at the third predetermined temperature in sequence; The heat medium water at the fourth predetermined temperature is used as a heat source of the heat sink to achieve heat utilization.

[0022] Compared with the prior art, the present invention has the following beneficial effects: The high-pressure flash black water stabilizing heat utilization method of the present invention performs high-pressure flash on high-temperature gasified black water of 230°C-260°C to obtain high-temperature black water of a first predetermined temperature; performs heat exchange on the high-temperature black water of the first predetermined temperature and heat medium water of a second predetermined temperature to obtain low-temperature black water of a third predetermined temperature and heat medium water of a fourth predetermined temperature; performs medium-pressure flash evaporation and low-pressure flash evaporation on the low-temperature black water of the third predetermined temperature in sequence; uses the heat medium water of the fourth predetermined temperature as a heat source for a heat sink, so as to exchange the heat of the high-temperature black water of the first predetermined temperature after high-pressure flash evaporation through the heat medium water, and uses the heat medium water after heat exchange at a heat island, so that the heat of the black water is fully utilized, the heat loss is reduced, and it is more energy-saving and environmentally friendly.

[0023] Furthermore, in the step S2, the high-temperature black water at the first predetermined temperature is firstly pressure-stabilized, and then heat-exchanged with the heat medium water at the second predetermined temperature after the pressure of the high-temperature black water at the first predetermined temperature is stabilized, so as to prevent the heat exchange process from being affected by the excessive height of the flash evaporation equipment and the excessive fluid pressure in the flash evaporation equipment, and then the high-temperature black water at the first predetermined temperature is firstly pressure-stabilized and then heat-exchanged to reduce damage to the equipment.

[0024] Furthermore, the pressure of the high-temperature black water at the first predetermined temperature is stabilized to below 1.0 MPa.

[0025] Furthermore, the pressure of the high-temperature black water at the first predetermined temperature is stabilized to 0.8-0.9 MPa.

[0026] Furthermore, the first predetermined temperature is 165°C to 185°C, the second predetermined temperature is 70°C to 100°C, the third predetermined temperature is 125°C to 105°C, and the fourth predetermined temperature is 115°C to 140°C, so as to use heat more stably.

[0027] The high-pressure flash black water pressure stabilizing heat utilization system 10 includes a black water cooling unit 100 and a heat recovery unit 200. The black water cooling unit 100 includes a high-pressure flash evaporator 110, a low-pressure flash evaporator 120, and a vacuum flash evaporator 130. The heat recovery unit 200 includes a first heat utilization part 210 and a second heat utilization part 220. The first heat utilization part 210 includes a heat exchange unit 211, a heat island 212, a buffer tank 213, and a circulating pump 214. The bottom outlet of the high-pressure flash evaporator 110 is connected to the black water inlet of the heat exchange unit 211, and the black water outlet of the heat exchange unit 211 is connected to the low-pressure flash evaporator 130. The inlet of the low-pressure flash evaporator 120 is connected, the bottom outlet of the low-pressure flash evaporator 120 is connected to the inlet of the vacuum flash evaporator 130, the heat medium water outlet of the heat exchange unit 211 is connected to the inlet of the heat island 212, the outlet of the heat island 212 is connected to the inlet of the buffer tank 213, the outlet of the buffer tank 213 is connected to the inlet of the circulation pump 214, the outlet of the circulation pump 214 is connected to the heat medium water inlet of the heat exchange unit 211, and the inlet of the second heat utilization part 220 is respectively connected to the flash gas outlets of the high-pressure flash evaporator 110 and the low-pressure flash evaporator 120 to fully utilize the heat of the black water.

[0028] Furthermore, the black water cooling unit 100 further includes a delivery pump 140 and a gray water tank 150 . The bottom of the vacuum flash evaporator 130 is connected to the inlet of the delivery pump 140 , and the outlet of the delivery pump 140 is connected to the inlet of the gray water tank 150 .

[0029] Furthermore, the black water cooling unit 100 further includes a heater 160 , the flash gas outlet of the high-pressure flash evaporator 110 is connected to the inlet of the heater 160 , and the outlet of the heater 160 is connected to the inlet of the stripping tower 221 .

[0030] Furthermore, the second heat utilization part 220 includes a stripping tower 221 and a deoxygenation water tank 222. The inlet of the stripping tower 221 is connected to the flash gas outlet of the high-pressure flash evaporator 110, and the inlet of the deoxygenation water tank 222 is connected to the flash gas outlet of the low-pressure flash evaporator 120. A gray water inlet pipe is arranged at the inlet of the stripping tower 221. The flash steam from the high-pressure flash evaporator 110 is sent to the stripping tower 221 to perform countercurrent contact heat exchange with the gray water from the deoxygenation water pump, and heat is recovered while performing stripping and secondary preheating of the gray water; the bottom liquid of the high-pressure flash evaporator 110 is sent to the low-pressure flash evaporator 120 for flash evaporation, and the flash steam from the low-pressure flash evaporator 120 is sent to the deoxygenation water tank 222 to replace part of the 0.5MPa low-pressure steam to deoxygenate and preheat the gray water from the gray water tank and the desalted water (or recycled water) added to the system, thereby recovering low-grade thermal energy in the system.

[0031] Furthermore, the first heat utilization unit 210 further includes a depressurization tank 216, the inlet of the depressurization tank 216 is connected to the bottom outlet of the high-pressure flash evaporator 110, the bottom outlet of the depressurization tank 216 is connected to the inlet of the heat exchange unit 211, and the top outlet of the depressurization tank 216 is connected to the inlet of the deoxygenation tank 222; on the one hand, since the flash pressure in the high-pressure flash evaporator 110 is high and the high-pressure flash evaporator 110 is arranged at a high position, the inflowing black water is depressurized by the depressurization tank 216 to prevent the black water from entering the inlet pressure of the heat exchange unit 211. The pressure is super high so that the heat exchanger unit 211 can operate for a long period of time; on the other hand, since part of the heat in the high-pressure flash evaporator 110 is replaced by the heat exchanger unit 211, the heat of the low-pressure flash evaporator 120 entering the deaeration tank 222 is reduced. In order to ensure that the heat of the deaeration tank 222 is not affected, the pressure in the depressurization tank is controlled to 0.8-0.9MPa so that the depressurization tank 216 also generates part of the flash gas that enters the deaeration tank 222, and then the heat in the high-pressure flash evaporator 110 is used by the heat exchanger unit 211, and the heating of the deaeration tank 222 is not affected.

[0032] Specifically, the high-pressure flash evaporator 110 has a height of 7500 mm and a pressure of 0.9 MPaG, and the pressure reduction tank 216 has a volume of 20 m 3 , height 3000mm, the high-temperature black water pressure is 1.1MPaG when entering the depressurization tank, and the pressure is reduced by the depressurization tank 216 to 0.8MPaG, so that the inlet pressure entering the heat exchange unit 211 is reduced.

[0033] Furthermore, the heat exchange unit 211 includes at least one heat exchanger.

[0034] Please see Figure 2Further, the heat exchange unit 211 includes: a first electric valve 2111, a second electric valve 2112, a third electric valve 2113, and a fourth electric valve 2114. The bottom outlet of the high-pressure flash evaporator 110 is connected to the first electric valve 2111 and the fourth electric valve 2114 respectively, the outlets of the first electric valve 2111 and the fourth electric valve 2114 are connected to the heat exchange unit 211, the outlet of the heat exchange unit 211 is connected to the inlet of the second electric valve 2112 and the third electric valve 2113, and the outlets of the second electric valve 2112 and the third electric valve 2113 are connected to the inlet of the low-pressure flash evaporator 120; at the beginning, the first electric valve 2111 and the third electric valve 2113 are controlled to be opened, and the second valve and the fourth valve are closed The black water comes out from the bottom of the high-pressure flash evaporator 110 and enters the heat exchange unit 211 through the first electric valve 2111. After the black water exchanges heat with the heat medium water of the heat exchange unit 211, the black water after heat exchange enters the low-pressure flash evaporator 120 through the third electric valve 2113. After running for 12 hours, the fourth electric valve 2114 and the second electric valve 2112 are controlled to be opened, and the first valve and the third valve are closed. The black water comes out from the bottom of the high-pressure flash evaporator 110 and enters the heat exchange unit 211 through the fourth electric valve 2114. After the black water exchanges heat with the heat medium water of the heat exchange unit 211, the black water after heat exchange enters the low-pressure flash evaporator 120 through the second electric valve 2112 to perform normal phase and reverse phase flow interval flushing to reduce the deposition of impurities in the black water in the heat exchanger.

[0035] Furthermore, the heat exchanger is a vortex flow channel heat exchanger, and the interior of the vortex flow channel heat exchanger is a plate, and the plates can be increased or decreased at will according to the flow rate and heat exchange area. The pressure-bearing effect is good, and it can bear the pressure of the fluid in the high-pressure flash evaporator 110. It can bear the pressure of the liquid in the high-pressure flash evaporator 110, and once the plate and frame heat exchanger is damaged, the plates are easy to replace.

[0036] Furthermore, the buffer tank 213 is provided with a nitrogen inlet pipe 2131, a vent pipe 2132, and a water replenishment pipe 2133. The nitrogen inlet pipe 2131 is connected to the gas inlet of the buffer tank 213, the vent pipe 2132 is connected to the top of the buffer tank 213, and the water replenishment pipe 2133 is connected to the liquid inlet pipe of the buffer tank 213. The nitrogen inlet replenishes gas to the pressure-stabilizing buffer tank to prevent the formation of negative pressure.

[0037] Furthermore, the outlet of the high-pressure flash evaporator 110 is also connected to the inlet of the low-pressure flash evaporator 120 , and the outlet of the circulation pump 214 is also connected to the circulation inlet of the buffer tank 213 .

[0038] Furthermore, the heat island 212 is one or more of a heating user, a hot water refrigeration unit, a hot water generator unit, a heat regeneration tower reboiler, and a deaerator.

[0039] Furthermore, the first heat utilization unit 210 also includes a heat island center system 215. The heat island center system 215 is connected to the heat exchange unit 211 and the heat island 212 respectively.

[0040] Specifically, the heat island center system 215 is a system in the prior art with the authorization announcement number of 102360181B. The heat exchanger unit 211 is equipped with online monitoring instruments for the temperature and pressure of the inlet and outlet pipes. The data is uploaded to the heat island center system 215 to monitor and judge the heat exchange effect and whether the heat exchanger is blocked or leaking. The heat medium water from the heat island 212 enters the buffer tank 213 through the heat medium water main pipe, and returns to the heat exchanger unit 211 for heat after being pressurized by the circulation pump 214. The pipe network of the entire heat extraction process is equipped with control valves, temperature, pressure, flow, water quality analysis and other instruments, including the flow, flow rate, temperature, pressure, surface temperature, heat dissipation, etc. of each section of the pipeline. The collected real-time data is uniformly entered into the heat island center system 215, and the heat calculation, prediction analysis and intelligent optimization control of the low-temperature heat system are performed using neural network algorithms and big data modeling to improve the operation efficiency of the low-temperature heat system.

[0041] To facilitate understanding, the present invention is further illustrated by the following examples.

[0042] Example: The heat island 212 is a thermal power boiler deaerator, and the heat exchange unit is two heat exchangers, namely a black water heat medium water heat exchanger and a heat medium water desalted water heat exchanger. The black water heat medium water heat exchanger is a vortex flow channel heat exchanger unit, and the unit model is: MGE37EC2BLEA-IG06-160-TB-LIQUID, and the heat medium water desalted water heat exchanger is a plate heat exchanger, and the equipment model is: UC35CW-1.6 / 125-493.

[0043] The black water inlet of the black water heat medium water heat exchanger is connected to the outlet of the high-pressure flash evaporator, the black water outlet of the black water heat medium water heat exchanger is connected to the inlet of the low-pressure flash evaporator, the heat medium water inlet of the black water heat medium water heat exchanger is connected to the outlet of the circulation pump, the heat medium water outlet of the black water heat medium water heat exchanger is connected to the heat medium water inlet of the heat medium water desalted water heat exchanger, the heat medium water outlet of the heat medium water desalted water heat exchanger is connected to the inlet of the buffer tank, the desalted water inlet of the heat medium water desalted water heat exchanger is used for the entry of desalted water, and the desalted water outlet of the heat medium water desalted water heat exchanger is connected to the desalted water inlet of the thermal power boiler deaerator.

[0044] The process parameters of the black water heat medium water heat exchanger and the process parameters of the heat medium water desalted water heat exchanger are shown in Table 1 and Table 2.

[0045] Table 1 Black water heat medium water heat exchanger process parameters

[0046] Table 2 Process parameters of heat exchanger for heat medium water desalination

[0047] Through the above method, 1.0MPaG steam consumption of the thermal power boiler deaerator can be saved.

[0048] What is disclosed above is only a preferred embodiment of the present invention, which certainly cannot be used to limit the scope of rights of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A method for utilizing high-pressure flash black water with constant pressure heat, characterized in that: The following steps are involved: S1: High-temperature gasified black water at 230° C.-260° C. is subjected to high-pressure flash evaporation to obtain high-temperature black water at a first predetermined temperature; S2: exchanging heat between the high-temperature black water at the first predetermined temperature and the heat medium water at the second predetermined temperature to obtain low-temperature black water at the third predetermined temperature and heat medium water at the fourth predetermined temperature; S3: performing medium-pressure flash evaporation and low-pressure flash evaporation on the low-temperature black water at the third predetermined temperature in sequence; The heat medium water at the fourth predetermined temperature is used as a heat source of the heat sink to achieve heat utilization.

2. The method for utilizing high-pressure flash black water by stabilizing heat according to claim 1, characterized in that: In the step S2, the high-temperature black water at the first predetermined temperature is firstly pressure-stabilized, and then heat-exchanged with the heat medium water at the second predetermined temperature after the pressure of the high-temperature black water at the first predetermined temperature is stabilized.

3. The method for utilizing high-pressure flash black water by stabilizing heat according to claim 2, characterized in that: The pressure of the high-temperature black water at the first predetermined temperature is stabilized to below 1.0 MPa.

4. The method for utilizing high-pressure flash black water by stabilizing heat according to claim 1, characterized in that: The first predetermined temperature is 165°C to 185°C, the second predetermined temperature is 70°C to 100°C, the third predetermined temperature is 125°C to 105°C, and the fourth predetermined temperature is 115°C to 140°C.

5. The high-pressure flash black water stabilizing heat utilization method according to claim 1 is carried out using a high-pressure flash black water stabilizing heat utilization system, characterized in that: The high-pressure flash black water pressure stabilizing heat utilization system includes a black water cooling unit and a heat recycling unit. The black water cooling unit includes a high-pressure flash evaporator, a low-pressure flash evaporator, and a vacuum flash evaporator. The heat recycling unit includes a first heat utilization part and a second heat utilization part. The first heat utilization part includes a heat exchanger unit, a heat island, a buffer tank, and a circulating pump. The bottom outlet of the high-pressure flash evaporator is connected to the black water inlet of the heat exchanger unit, the black water outlet of the heat exchanger unit is connected to the inlet of the low-pressure flash evaporator, the bottom outlet of the low-pressure flash evaporator is connected to the inlet of the vacuum flash evaporator, the heat medium water outlet of the heat exchanger unit is connected to the inlet of the heat island, the outlet of the heat island is connected to the inlet of the buffer tank, the outlet of the buffer tank is connected to the inlet of the circulating pump, the outlet of the circulating pump is connected to the heat medium water inlet of the heat exchanger unit, and the inlet of the second heat utilization part is respectively connected to the flash gas outlets of the high-pressure flash evaporator and the low-pressure flash evaporator to fully utilize the heat of the black water.

6. The high-pressure flash black water stabilizing heat utilization system according to claim 5, characterized in that: The first heat utilization part also includes a decompression tank, the inlet of the decompression tank is connected to the bottom outlet of the high-pressure flash evaporator, the bottom outlet of the decompression tank is connected to the inlet of the heat exchange unit, and the top outlet of the decompression tank is connected to the outlet of the low-pressure flash evaporator.

7. The high-pressure flash black water stabilizing heat utilization system according to claim 5, characterized in that: The heat exchange unit includes at least one heat exchanger.

8. The high-pressure flash black water stabilizing heat utilization system according to claim 7, characterized in that: The heat exchanger is a plate heat exchanger.

9. The high-pressure flash black water stabilizing heat utilization system according to claim 5, characterized in that: The second heat utilization part includes a stripping tower and a deoxygenation water tank. The inlet of the stripping tower is connected to the flash gas outlet of the high-pressure flash evaporator, and the inlet of the deoxygenation water tank is connected to the flash gas outlet of the low-pressure flash evaporator.

10. The high-pressure flash black water stabilizing heat utilization system according to claim 5, characterized in that: The heat island is one or more of a heating user, a hot water refrigeration unit, a hot water generator unit, a heat regeneration tower reboiler, and a deaerator.

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