CN112537811B - System and process for degrading organic medical wastewater and recycling energy of organic medical wastewater - Google Patents
System and process for degrading organic medical wastewater and recycling energy of organic medical wastewater Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/04—Heat
- A61L2/06—Hot gas
- A61L2/07—Steam
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/08—Adaptations for driving, or combinations with, pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/06—Returning energy of steam, in exchanged form, to process, e.g. use of exhaust steam for drying solid fuel or plant
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
- F01K7/32—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating the engines using steam of critical or overcritical pressure
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/10—Apparatus features
- A61L2202/11—Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
- A61L2202/20—Targets to be treated
- A61L2202/24—Medical instruments, e.g. endoscopes, catheters, sharps
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/003—Wastewater from hospitals, laboratories and the like, heavily contaminated by pathogenic microorganisms
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
Abstract
A system for degrading organic medical wastewater and recycling energy of the organic medical wastewater comprises a buffer tank, a high-temperature high-pressure steam disinfection chamber, a heat exchanger, a near/supercritical water oxidation reactor, a turbine/expander, a compressor and the like, wherein hydrogen peroxide and medical wastewater are mixed and then undergo a near/supercritical water oxidation reaction in the near/supercritical water oxidation reactor to obtain high-temperature high-pressure gas or near/supercritical state substances; the turbine/expander drives the compressor, and the compressor drives the refrigeration cycle to provide a cold source for medicine storage; high-temperature high-pressure gas at the outlet of the turbine/expander is firstly preheated to be mixed with hydrogen peroxide and medical wastewater entering a near/supercritical water oxidation reactor, and then is discharged after providing energy for a high-temperature steam disinfection chamber and regional heating in sequence; based on a near/supercritical water oxidation technology and an energy gradient utilization principle, the invention carries out overall management on energy released in the degradation process of organic matters in the medical wastewater, and realizes the cooperative regulation and control of the heat load, the cold load and the sewage load of the system.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, relates to a supercritical water oxidation and distributed energy system, and particularly relates to a composite process flow integrating organic medical wastewater degradation, medical equipment disinfection, low-temperature drug storage and regional heating.
Background
The amount of wastewater generated by hospitals is 400-1200 liters per bed per day per bed, and is about 750 liters per bed on average per day, so that the wastewater not only contains residual components of various chemicals, but also comprises various viruses, and has the characteristics of complex components, high concentration, high toxicity and the like. The effective treatment of medical wastewater is not only a necessary measure for avoiding environmental pollution, but also an important measure for preventing virus diffusion and ensuring the life safety of people under special conditions. From the aspect of sewage treatment, medical wastewater contains various refractory macromolecular benzene ring substances, belongs to refractory organic wastewater, and the traditional wastewater treatment methods, such as an electrolysis method, an activated carbon adsorption method, a coagulating sedimentation method, a biological treatment method and the like, are difficult to ensure that the treated water quality reaches the discharge standard. Therefore, the method for treating the medical wastewater, which is efficient, practical and environment-friendly, has important practical significance.
The near/supercritical water treatment technology is a sewage treatment technology aiming at refractory organic matters, can deeply oxidize various organic matters in toxic, harmful and refractory sewage, and is an effective means aiming at toxic, harmful and medical wastewater treatment. In the oxidation process of near/supercritical water, a large amount of heat energy is released by the chemical energy, the utilization rate of energy can be increased by reasonably utilizing the heat energy, and meanwhile, energy can be provided for low-temperature storage of medicines and disinfection of medical instruments. However, the current high efficiency technology of near/supercritical water oxidation for medical wastewater treatment fails to make good use of the large amount of heat energy released during the degradation of medical wastes.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a composite process flow integrating organic medical wastewater degradation, medical equipment disinfection, low-temperature medicine storage and regional heating, which is based on a near/supercritical water oxidation technology and an energy gradient utilization principle, carries out overall management on energy released in the degradation process of organic matters in medical wastewater, and realizes the cooperative regulation and control of the heat load, the cold load and the sewage load of a system.
In order to achieve the purpose, the invention adopts the technical scheme that:
an organic medical wastewater degradation and energy recycling system comprises:
a buffer tank 8 with a medical waste water inlet 9 and a water inlet one 10;
a high-temperature high-pressure steam sterilizing chamber 16, the outlet of which is connected with the buffer tank 8;
a cold source side inlet of the heat exchanger I6 is connected with an outlet of the buffer tank 8 and a hydrogen peroxide inlet 1, and is used for heating the medical wastewater and the hydrogen peroxide;
an inlet of the near/supercritical water oxidation reactor 3 is connected with a cold source side outlet of the heat exchanger I6, and the heated medical wastewater and hydrogen peroxide mixed solution are subjected to near/supercritical water oxidation reaction to obtain high-temperature and high-pressure gas or near/supercritical state substances;
the inlet of the turbine/expander 4 is close to the outlet of the supercritical water oxidation reactor 3, and the outlet of the turbine/expander is connected with the heat source side inlet of the first heat exchanger 6;
the compressor 5 is connected with the output of the turbine/expander 4, performs compression refrigeration, and provides cold energy for the low-temperature medicine storage chamber 22 through a refrigeration subsystem;
a cold source side inlet of the second heat exchanger 13 is connected with a second water inlet 15, a heat source side inlet is connected with a heat source side outlet of the first heat exchanger 6, and a cold source side outlet is connected with a steam spray head 11 of a high-temperature high-pressure steam disinfection chamber 16;
and a heat source side inlet of the heat exchanger fifth 23 is connected with a heat source side outlet of the heat exchanger second 13, the heat source side outlet is connected with a water drainage port 26, and a cold source side outlet is connected with a heat source 25 of a hospital community heat user.
The refrigeration subsystem comprises a refrigeration cycle condenser 18 and a refrigeration cycle evaporator 19, a cold source side inlet of the refrigeration cycle condenser 18 is connected with a water inlet III 17, a cold source side outlet is connected with a cold source side inlet of the heat exchanger V23, a heat source side outlet is connected with a heat source side inlet of the refrigeration cycle evaporator 19, and the compressor 5 is connected between a heat source side outlet of the refrigeration cycle evaporator 19 and a heat source side inlet of the refrigeration cycle condenser 18.
A refrigeration cycle throttle valve 20 is provided between the heat source side inlet of the cold cycle evaporator 19 and the heat source side outlet of the refrigeration cycle condenser 18.
The working medium of the refrigeration subsystem is a single-component refrigerant or a mixture of multiple refrigerants.
The invention also provides a process based on the organic medical wastewater degradation and energy recycling system, which comprises the following steps:
1. medical wastewater enters the buffer tank 8 from the medical wastewater inlet 9, and water is injected into the buffer tank 8 through the water inlet I10 to adjust the medical wastewater to a target concentration;
2. hydrogen peroxide enters the system from a hydrogen peroxide inlet 1, is mixed with medical wastewater, absorbs heat in a heat exchanger I6, is preheated, and then enters a near/supercritical water oxidation reactor 3 to carry out a near/supercritical water oxidation reaction;
3. the high-temperature and high-pressure gas or the near/supercritical state substance obtained after the reaction firstly passes through the turbine/expander 4, and is expanded in the turbine/expander 4 to do work, so that the compressor 5 is pushed to rotate, and part of energy is recovered in the form of mechanical energy; preheating medical wastewater and hydrogen peroxide mixed solution by using exhaust gas at the outlet of the turbine/expander 4 through a heat exchanger I6; then the heat is released through a second heat exchanger 13, the water pressurized by a water pump 14 is heated to form high-temperature high-pressure steam, the pressure is adjusted through a first pressure adjusting valve 12, the high-temperature high-pressure steam enters a high-temperature high-pressure steam sterilizing chamber 16, and the high-temperature high-pressure steam is sprayed out through a nozzle 11; the multiphase reaction product discharged from the second heat exchanger 13 is subjected to heat release in a fifth heat exchanger 23, and the reaction product after heat release is regulated to a certain pressure through a second pressure regulating valve 24 and then discharged;
4. after entering from the water inlet III 17, the condensed water absorbs heat through the refrigeration cycle condenser 18 and the heat exchanger V23, and the generated hot water flows out to the hot user heat source 25 of the hospital community for the hot user of the hospital community to use;
5. normal temperature water flows into the second heat exchanger 13 through the second water inlet 15, enters the high-temperature high-pressure steam disinfection chamber 16 after absorbing heat in the second heat exchanger 13, is sprayed out of the steam spray nozzle 11, disinfects a medical device in the high-temperature high-pressure steam disinfection chamber 16, and liquid generated after cooling flows into the buffer tank 8 and enters the near/supercritical water oxidation reactor 3 together with medical wastewater for purification treatment.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention realizes the treatment of medical waste water and the recycling and energy utilization of the medical waste water, carries out overall management on energy released in the degradation process of organic matters in the medical waste water, solves the energy problem and the treatment problem of the medical waste water, gives consideration to the specificity of hospitals, provides steam and cold for a high-temperature high-pressure steam disinfection room and a low-temperature medicine storage room, and provides heat for hospital areas.
(2) According to the process flow provided by the invention, the heat load, the cold load and the sewage load are mutually coupled and mutually influenced, and the cooperative control of the heat load, the cold load and the sewage load of the whole system is realized through the modes of initial energy distribution, subsystem thermal parameter adjustment and the like.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
Detailed Description
The embodiments of the present invention will be described in detail below with reference to the drawings and examples.
The system for degrading the organic medical wastewater and recycling the energy of the organic medical wastewater integrates the functions of degrading the organic medical wastewater, disinfecting medical equipment, storing low-temperature medicines and heating areas, reasonably utilizes the energy released in the process of degrading the medical pollutants, and realizes the energy utilization of the medical wastewater.
As shown in fig. 1, the system includes:
and a buffer tank 8 for temporarily storing and dispensing medical wastewater, wherein the buffer tank is provided with a medical wastewater inlet 9 and a water inlet I10.
A high-temperature high-pressure steam sterilizing chamber 16 for sterilizing by using high-temperature high-pressure steam, and an outlet thereof is connected with the buffer tank 8.
The cold source side inlet of the heat exchanger I6 is connected with the outlet of the buffer tank 8 through a water pump I7 and passes through
The hydrogen peroxide inlet 1 is used for heating the medical wastewater and the hydrogen peroxide.
And an inlet of the near/supercritical water oxidation reactor 3 is connected with a cold source side outlet of the heat exchanger I6, and the pressurized and heated medical wastewater and hydrogen peroxide mixed solution are subjected to near/supercritical water oxidation reaction to obtain high-temperature and high-pressure gas or near/supercritical state substances.
And the inlet of the turbine/expander 4 is close to the outlet of the supercritical water oxidation reactor 3, the outlet of the turbine/expander is connected with the heat source side inlet of the heat exchanger I6, and high-temperature and high-pressure steam which exits from the turbine/expander 4 passes through the heat exchanger I6 to provide energy for the medical wastewater and hydrogen peroxide mixed solution which enters the supercritical water oxidation reactor 3.
And the compressor 5 is connected with the output of the turbine/expansion machine 4, the turbine/expansion machine 4 provides an energy source for compression refrigeration circulation, the compression refrigeration is driven to be carried out, and cold energy is provided for the low-temperature medicine storage chamber 22 through a refrigeration subsystem.
And a cold source side inlet of the second heat exchanger 13 is connected with a water inlet II 15 through a water pump III 14, a heat source side inlet is connected with a heat source side outlet of the first heat exchanger 6, a cold source side outlet is connected with a steam spray head 11 of the high-temperature high-pressure steam sterilizing chamber 16, and steam out of the first heat exchanger 6 is used for providing heat for the high-temperature high-pressure steam sterilizing chamber 16.
And a heat source side inlet of the heat exchanger five 23 is connected with a heat source side outlet of the heat exchanger two 13, the heat source side outlet is connected with a water discharge port 26 through a valve 24, a cold source side outlet is connected with a heat source 25 of a hospital community heat user, and hot water discharged from the heat exchanger two 13 is discharged from the water discharge port 26 after being discharged in the heat exchanger five 23.
In the invention, the working medium of the refrigeration subsystem is a single-component refrigerant or a mixture of a plurality of refrigerants, the refrigeration subsystem comprises a refrigeration cycle condenser 18 (namely a heat exchanger III) and a refrigeration cycle evaporator 19 (namely a heat exchanger IV), a cold source side inlet of the refrigeration cycle condenser 18 is connected with a water inlet III 17, a cold source side outlet is connected with a cold source side inlet of a heat exchanger V23, a heat source side outlet is connected with a heat source side inlet of the refrigeration cycle evaporator 19, and a refrigeration cycle throttle valve 20 is arranged between the heat source side inlet of the refrigeration cycle evaporator 19 and the heat source side outlet of the refrigeration cycle condenser 18. The compressor 5 is connected between the heat-source-side outlet of the refrigeration cycle evaporator 19 and the heat-source-side inlet of the refrigeration cycle condenser 18.
The invention also provides a process based on the organic medical wastewater degradation and energy recycling system, and the process flow and the principle are as follows
1. Medical wastewater enters the buffer tank 8 from the medical wastewater inlet 9, is pressurized by the water pump I7, and is injected into the buffer tank 8 through the water inlet I10 to adjust the medical wastewater to a target concentration.
2. Hydrogen peroxide enters the system through a hydrogen peroxide inlet 1, is pressurized by a water pump II 2, is mixed with medical wastewater, absorbs heat in a heat exchanger I6, is preheated, and then enters a near/supercritical water oxidation reactor 3 to carry out a near/supercritical water oxidation reaction.
3. The high-temperature and high-pressure gas or the near/supercritical state substance obtained after the reaction firstly passes through the turbine/expander 4, and is expanded in the turbine/expander 4 to do work, so that the compressor 5 is pushed to rotate, and part of energy is recovered in the form of mechanical energy; preheating medical wastewater and hydrogen peroxide mixed solution which is about to enter the near/supercritical water oxidation reactor 3 by exhaust gas at the outlet of the turbine/expander 4 through a heat exchanger I6; then the heat is released through a second heat exchanger 13, the water pressurized by a water pump 14 is heated to form high-temperature and high-pressure steam, the pressure of the high-temperature and high-pressure steam is adjusted through a first pressure adjusting valve 12, the high-temperature and high-pressure steam enters a high-temperature and high-pressure steam sterilizing chamber 16, and the high-temperature and high-pressure steam is sprayed out through a steam nozzle 11; the multiphase reaction product discharged from the second heat exchanger 13 is subjected to heat release in a fifth heat exchanger 23, and the reaction product after heat release is regulated to a certain pressure through a second pressure regulating valve 24 and then discharged;
4. after entering from the water inlet III 17, the condensed water absorbs heat through the refrigeration cycle condenser 18 and the heat exchanger V23, and the generated hot water flows out to the hot user heat source 25 of the hospital community for the hot user of the hospital community to use;
5. normal temperature water flows into the second heat exchanger 13 after being pressurized by the second water inlet 15 through the third water pump 14, after absorbing heat in the second heat exchanger 13, the normal temperature water is pressure-regulated by the first pressure regulating valve 12, enters the high-temperature high-pressure steam disinfection chamber 16, is sprayed out of the steam spray head 11, disinfects a medical instrument in the high-temperature high-pressure steam disinfection chamber 16, and liquid generated after cooling flows into the buffer tank 8 and enters the near/supercritical water oxidation reactor 3 together with medical wastewater to be purified.
In the present invention, the turbine/expander 4 and the compressor 5 can be selected to be coaxial or non-coaxial according to the specific spatial layout of the system.
In conclusion, the invention realizes the oxidative degradation of toxic and harmful organic matters in the medical wastewater in the near/supercritical water oxidation reactor 3 through the near/supercritical water oxidation reaction, and releases heat; the released heat is reused. High-temperature and high-pressure gas or near/supercritical state substances generated by the reaction recover partial energy in the form of mechanical energy through the turbine/expander 4, drive the compressor 5 to drive vapor compression refrigeration circulation, and provide cold energy for the medicine bottle storage room through the cold source 19 of the low-temperature medicine storage room; hot water is provided through the refrigeration cycle condenser 18 and the heat exchanger five 23 to supply heat for hospital/community heat users. The system is simple, and the medical device can realize the functions of high-temperature and high-pressure disinfection, low-temperature medicine storage, regional heating and the like while finishing the treatment of medical wastewater. The heat load, the cold load and the wastewater load in the system are mutually coupled and mutually influenced, and the heat load, the cold load and the wastewater load of the whole system can be cooperatively regulated and controlled by the modes of initial energy distribution, subsystem thermal parameter adjustment and the like, so that the flexible control of the system in different climatic environments and different seasons is realized.
Claims (4)
1. An organic medical wastewater degradation and energy recycling system is characterized by comprising:
a buffer tank (8) with a medical waste water inlet (9) and a water inlet I (10);
a high-temperature high-pressure steam sterilizing chamber (16), the outlet of which is connected with the buffer tank (8);
a cold source side inlet of the heat exchanger I (6) is connected with an outlet of the buffer tank (8) and a hydrogen peroxide inlet (1) to heat the medical wastewater and the hydrogen peroxide;
an inlet of the near/supercritical water oxidation reactor (3) is connected with an outlet on the cold source side of the heat exchanger I (6), and the heated medical wastewater and hydrogen peroxide mixed solution are subjected to near/supercritical water oxidation reaction in the near/supercritical water oxidation reactor to obtain high-temperature and high-pressure gas or near/supercritical state substances;
the inlet of the turbine/expander (4) is close to the outlet of the supercritical water oxidation reactor (3), and the outlet of the turbine/expander is connected with the heat source side inlet of the first heat exchanger (6);
the compressor (5) is connected with the output of the turbine/expander (4) for compression and refrigeration, and cold energy is provided for the low-temperature medicine storage chamber (22) through a refrigeration subsystem;
a cold source side inlet of the heat exchanger II (13) is connected with a water inlet II (15), a heat source side inlet is connected with a heat source side outlet of the heat exchanger I (6), and a cold source side outlet is connected with a steam spray head (11) of the high-temperature high-pressure steam disinfection chamber (16);
a heat source side inlet of the heat exchanger fifth (23) is connected with a heat source side outlet of the heat exchanger second (13), the heat source side outlet is connected with a water outlet (26), and a cold source side outlet is connected with a hot source (25) of a hospital community hot user;
the refrigeration subsystem comprises a refrigeration cycle condenser (18) and a refrigeration cycle evaporator (19), a cold source side inlet of the refrigeration cycle condenser (18) is connected with a water inlet III (17), a cold source side outlet is connected with a cold source side inlet of a heat exchanger V (23), a heat source side outlet is connected with a heat source side inlet of the refrigeration cycle evaporator (19), and a compressor (5) is connected between a heat source side outlet of the refrigeration cycle evaporator (19) and the heat source side inlet of the refrigeration cycle condenser (18).
2. The organic medical wastewater degradation and energy recycling system according to claim 1, wherein a refrigeration cycle throttle valve (20) is disposed between a heat source side inlet of the cold cycle evaporator (19) and a heat source side outlet of the refrigeration cycle condenser (18).
3. The system for degrading organic medical wastewater and recycling energy thereof according to claim 1 or 2, wherein the working medium of the refrigeration subsystem is a single-component refrigerant or a mixture of a plurality of refrigerants.
4. The process of the system for degrading organic medical wastewater and recycling energy thereof based on the claim 1 is characterized by comprising the following steps:
1) medical wastewater enters the buffer tank (8) from the medical wastewater inlet (9), and water is injected into the buffer tank (8) through the water inlet I (10) to adjust the medical wastewater to a target concentration;
2) hydrogen peroxide enters the system from a hydrogen peroxide inlet (1), is mixed with medical wastewater, absorbs heat in a heat exchanger I (6), is preheated, and then enters a near/supercritical water oxidation reactor (3) to carry out a near/supercritical water oxidation reaction;
3) the high-temperature and high-pressure gas or the near/supercritical state substance obtained after the reaction firstly passes through the turbine/expander (4) and is expanded in the turbine/expander (4) to do work, so that the compressor (5) is pushed to rotate, and a part of energy is recovered in the form of mechanical energy; preheating medical wastewater and hydrogen peroxide mixed solution by exhaust gas at the outlet of the turbine/expander (4) through a heat exchanger I (6); then the heat is released through a second heat exchanger (13), the water pressurized by the water pump (14) is heated to form high-temperature and high-pressure steam, the pressure of the high-temperature and high-pressure steam is adjusted through a first pressure adjusting valve (12), the high-temperature and high-pressure steam enters a high-temperature and high-pressure steam sterilizing chamber (16), and the high-temperature and high-pressure steam is sprayed out through a steam nozzle (11); the multiphase reaction product discharged from the heat exchanger II (13) is subjected to heat release in a heat exchanger V (23), and the reaction product after heat release is regulated to a certain pressure through a pressure regulating valve II (24) and then discharged;
4) after entering from the water inlet III (17), the condensed water absorbs heat through the refrigeration cycle condenser (18) and the heat exchanger V (23), and the generated hot water flows out to a hot user heat source (25) of the hospital community for the hot user of the hospital community to use;
5) normal temperature water flows into the second heat exchanger (13) through the second water inlet (15), enters the high-temperature high-pressure steam disinfection chamber (16) after absorbing heat in the second heat exchanger (13), is sprayed out of the steam spray head (11), disinfects a medical device in the high-temperature high-pressure steam disinfection chamber (16), and liquid generated after cooling flows into the buffer tank (8) and enters the near/supercritical water oxidation reactor (3) together with medical wastewater to be purified.
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| JP6692373B2 (en) * | 2015-04-13 | 2020-05-13 | アルキメーデ・ソチエタ・ア・レスポンサビリタ・リミタータＡｒｃｈｉｍｅｄｅ Ｓ．ｒ．ｌ． | Waste treatment plant and related methods |
| WO2019040277A1 (en) * | 2017-08-22 | 2019-02-28 | Michael Modell | Supercritical water oxidation systems for energy recovery and use thereof |
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| CN111852798B (en) * | 2020-08-06 | 2024-04-02 | 西安交通大学 | Solar energy utilization-based heat-electricity-clean water co-production system |
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