CN112209549B - Hospital comprehensive energy system for energy utilization of medical wastewater - Google Patents
Hospital comprehensive energy system for energy utilization of 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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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
- 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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Abstract
A hospital comprehensive energy system for medical wastewater energy utilization comprises: a high-temperature high-pressure steam sterilizing chamber; the near/supercritical water oxidation reactor is used for carrying out near/supercritical water oxidation reaction on the pressurized air and the heated medical wastewater to obtain high-temperature and high-pressure gas or near/supercritical state substances; the first turbine/expander is connected with the outlet of the near/supercritical water oxidation reactor and drives the first generator to generate electricity, and the outlet of the first turbine/expander is divided into two paths; and the thermoelectric/power conversion subsystem is connected with one path of the outlet of the turbine/expander and utilizes the heat source thereof to carry out thermoelectric/power conversion, and the other path of the outlet of the turbine/expander provides the heat source for heating medical wastewater and a high-temperature high-pressure steam disinfection chamber. The present invention may further comprise: a low temperature drug holding room; and the refrigeration subsystem is used for providing a cold source for the low-temperature medicine storage room. The invention realizes the energy utilization of medical wastewater based on a near/supercritical water oxidation technology and an energy cascade utilization principle.
Description
Technical Field
The invention belongs to the technical field of energy utilization and sewage treatment, relates to supercritical water oxidation, medium-low grade waste heat power generation and distributed energy application, and particularly relates to a hospital comprehensive energy system for energy utilization of medical wastewater.
Background
Under normal conditions, effective treatment of medical wastewater is not only an essential measure for avoiding environmental pollution, but also an important measure for preventing virus diffusion and ensuring life safety of people under special conditions. The amount of hospital-generated wastewater was 400 liters per bed per day and 1200 liters per bed per day, with an average of about 750 liters per bed per day. Besides large sewage yield, the medical wastewater contains a large amount of pathogenic bacteria, viruses and chemical agents, has the characteristics of complex components, high concentration, high toxicity and the like, contains various refractory macromolecular benzene ring substances besides oils, amines, acids and demulsifiers, and belongs to refractory organic wastewater. 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 can treat various kinds of industrial sewageDeep oxidation of organic matter to convert the organic matter into clean water and CO2And inorganic salt with stable related elements, and the like, and is an effective means for treating toxic and harmful medical wastewater. In the oxidation process of near/supercritical water, a large amount of heat energy is released by the chemical energy in the oxidation process, and the utilization rate of energy can be increased by reasonably utilizing the heat energy. 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 defect of high energy consumption in the conventional medical wastewater treatment, the invention aims to provide a hospital comprehensive energy system for energy utilization of medical wastewater, based on a near/supercritical water oxidation technology and an energy gradient utilization principle, the energy released in the degradation process of organic matters in the medical wastewater is comprehensively managed, the heat load, the electric load, the cold load and the sewage load of the system are mutually coupled and mutually influenced, and the cooperative control of the electric load, the heat load, the cold load and the sewage load of the whole system is realized through modes of initial energy distribution, subsystem thermal parameter adjustment and the like. Meanwhile, the problems of energy source and medical wastewater treatment are solved, and the problems of power utilization, water utilization, heat utilization and cold utilization in hospital areas are solved.
In order to achieve the purpose, the invention adopts the technical scheme that:
a hospital comprehensive energy system for medical wastewater energy utilization comprises:
a high-temperature high-pressure steam sterilizing chamber 31;
a near/supercritical water oxidation reactor 6, the inlet of which is connected with the outlet of the multistage air compressor and the outlet of the heated medical wastewater, wherein the pressurized air and the heated medical wastewater undergo a near/supercritical water oxidation reaction to obtain high-temperature and high-pressure gas or near/supercritical state substances;
the first turbine/expander 7 is connected to the outlet of the near/supercritical water oxidation reactor 6 and drives the first generator 8 to generate electricity, and the outlet of the first turbine/expander 7 is divided into two paths;
and the thermoelectric/power conversion subsystem is connected with one path of the outlet 7 of the first turbine/expander and performs thermoelectric/power conversion by using a heat source of the thermoelectric/power conversion subsystem, and the other path of the outlet 7 of the first turbine/expander provides a heat source for heating medical wastewater and a high-temperature high-pressure steam disinfection chamber 31.
Further, an outlet of the high-temperature and high-pressure steam disinfection chamber 31 is connected with a buffer tank 30, the buffer tank 30 is provided with a medical wastewater inlet 39 and a first water inlet 40, an outlet of the buffer tank 30 is connected with a cold source side inlet of a first heat exchanger 28 through a first water pump 29, and a cold source side outlet of the first heat exchanger 28 is connected with an inlet of the proximity/supercritical water oxidation reactor 6; the other path of the outlet of the first turbine/expander 7 is connected with a heat source side inlet of a first heat exchanger 28, a heat source side outlet of the first heat exchanger 28 is connected with a heat source side inlet of a second heat exchanger 33, a heat source side outlet of the second heat exchanger 33 is connected with a heat source side inlet of a third heat exchanger 16, a cold source side inlet of the second heat exchanger 33 is connected with a second water inlet 35 through a second water pump 34, and a cold source side outlet of the second heat exchanger 33 is connected with a steam spray head of the high-temperature high-pressure steam disinfection chamber 31.
Furthermore, the multistage air compressor adopts an interstage cooling mode and comprises an air compressor I2, an interstage cooler I12, an air compressor II 3, an interstage cooler II 13 and an air compressor III 4 which are sequentially connected in series, wherein an inlet of the air compressor I2 is connected with an air inlet 1, an outlet of the air compressor III 4 is connected with an inlet of the near/supercritical water oxidation reactor 6, cold source side inlets of the interstage cooler I12 and the interstage cooler II 13 are both connected with a cooling water inlet 11, and cold source side outlets are both connected with a cold source side inlet of the heat exchanger III 16.
Further, the thermoelectric/power conversion subsystem comprises a thermal power/power conversion circulating condenser 15 and a thermal power/power conversion circulating evaporator 19, one path of the outlet of the first turbine/expander 7 is connected with a heat source side inlet of the thermal power/power conversion circulating evaporator 19, a heat source side outlet of the thermal power/power conversion circulating evaporator 19 is connected with a heat source side inlet of a third heat exchanger 16, a cold source side inlet of the thermal power/power conversion circulating condenser 15 is connected with a cooling water inlet 11, a cold source side outlet is connected with a cold source side inlet of the third heat exchanger 16, a heat source side outlet of the thermal power/power conversion circulating condenser 15 is connected with a cold source side inlet of the thermal power/power conversion circulating evaporator 19 through a working medium pump 20, a cold source side outlet of the thermal power/power conversion circulating evaporator 19 is connected with an inlet of a second turbine/expander 9 of the second generator 10, the outlet of the second turbine/expander 9 is connected to the heat source side inlet of the heat-power/electricity conversion cycle condenser 15.
Further, the present invention may further include:
a low-temperature medicine storage chamber 24;
and the refrigeration subsystem is used for providing a cold source for the low-temperature medicine preservation chamber 24.
Further, the refrigeration subsystem comprises a refrigeration cycle condenser 14 and a refrigeration cycle evaporator 21, a cold source side inlet of the refrigeration cycle condenser 14 is connected with the cooling water inlet 11, a cold source side outlet of the refrigeration cycle condenser is connected with a cold source side inlet of the heat exchanger III 16, a heat source side inlet of the refrigeration cycle evaporator 21 is connected with a heat source side outlet of the refrigeration cycle condenser 14, a heat source side outlet of the refrigeration cycle evaporator 21 is connected with an inlet of the air compressor IV 5, an outlet of the air compressor IV 5 is connected with a heat source side inlet of the refrigeration cycle condenser 14, a cold source side outlet of the refrigeration cycle evaporator 21 is divided into two paths, a low-temperature medicine storage room cold source 23 and a hospital community cold user cold source 26 are respectively connected, and outlets of the low-temperature medicine storage room cold source 23 and the hospital community cold user cold source 26 are connected with a cold source side inlet of the refrigeration cycle evaporator 21.
Further, a cold source side outlet of the heat exchanger III 16 is connected with a hot source 38 of a hospital community hot user, and a hot source side outlet is connected with the gas-liquid separator 18.
Further, a refrigeration cycle throttle valve 22 is provided between the heat-source-side inlet of the refrigeration cycle evaporator 21 and the heat-source-side outlet of the refrigeration cycle condenser 14.
Further, the thermoelectric/work conversion subsystem is an organic rankine cycle system or a supercritical carbon dioxide cycle system; the working medium of the refrigeration subsystem is one or more of water, a refrigerant, an organic matter and carbon dioxide, and the working medium of the refrigeration subsystem is a single-component refrigerant or a mixture of a plurality of refrigerants.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention realizes the treatment of medical waste water and the energy utilization thereof, 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 particularity of hospital communities, provides steam and cold for a high-temperature high-pressure steam disinfection room and a low-temperature medicine storage room, and meets the problems of power utilization, water utilization, heat utilization and cold utilization in hospital areas.
(2) The heat load, the electric load, the cold load and the sewage load of the comprehensive energy system provided by the invention are mutually coupled and mutually influenced, and the cooperative control of the electric load, the heat load, the cold load and the sewage load of the whole system is realized through modes of initial energy distribution, subsystem thermal parameter adjustment and the like.
(3) The system of the invention is simple, flexible in operation, can realize self-sufficiency in stable operation, and can not need external power supply.
Drawings
FIG. 1 is a schematic view of the structure 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 invention relates to a hospital comprehensive energy system for recycling medical wastewater, which reasonably utilizes a large amount of energy released in the degradation process of medical pollutants based on the principle of energy gradient utilization, realizes the recycling of medical wastewater and changes waste into valuable.
The system structure of the invention is shown in figure 1, which mainly comprises:
the buffer tank 30 is used for temporarily storing and preparing medical wastewater and is provided with a medical wastewater inlet 39 and a water inlet I40, and the outlet of the buffer tank 30 is connected with the cold source side inlet of the heat exchanger I28 through a water pump I29;
a high-temperature high-pressure steam sterilizing chamber 31 for sterilizing by using high-temperature high-pressure steam, an outlet of which is connected with the buffer tank 30;
the multistage air compressor adopts an interstage cooling mode, in the embodiment, the multistage air compressor comprises an air compressor I2, an interstage cooler I12, an air compressor II 3, an interstage cooler II 13 and an air compressor III 4 which are sequentially connected in series, an inlet of the air compressor I2 is connected with an air inlet 1, cold source side inlets of the interstage cooler I12 and the interstage cooler II 13 are connected with a cooling water inlet 11, cold source side outlets are connected with a cold source side inlet of a heat exchanger III 16, a cold source side outlet of the heat exchanger III 16 is connected with a hot source 38 of a hospital community, and a hot source side outlet is connected with a gas-liquid separator 18 through a pipeline with a valve II 17;
the inlet of the near/supercritical water oxidation reactor 6 is connected with the outlet of the air compressor III 4 and the outlet at the cold source side of the heat exchanger I28, and pressurized air and heated medical wastewater 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 first turbine/expander 7 is connected to the outlet of the near/supercritical water oxidation reactor 6 and drives the first generator 8 to generate electricity, and the outlet of the first turbine/expander 7 is divided into two paths;
the thermoelectric/power conversion subsystem is connected with heat output from the first turbine/expander 7 for thermoelectric/power conversion and comprises a thermal power/power conversion circulating condenser 15 and a thermal power/power conversion circulating evaporator 19, one path of an outlet of the first turbine/expander 7 is connected with a heat source side inlet of the thermal power/power conversion circulating evaporator 19, a heat source side outlet of the thermal power/power conversion circulating evaporator 19 is connected with a heat source side inlet of a third heat exchanger 16, a cold source side inlet of the thermal power/power conversion circulating condenser 15 is connected with a cooling water inlet 11, a cold source side outlet is connected with a cold source side inlet of the third heat exchanger 16, a heat source side outlet of the thermal power/power conversion circulating condenser 15 is connected with a cold source side inlet of the thermal power/power conversion circulating evaporator 19 through a working medium pump 20, a cold source side outlet of the thermal power/power conversion circulating evaporator 19 is connected with an inlet of a second turbine/expander 9 of a second generator 10, the outlet of the second turbine/expander 9 is connected with the heat source side inlet of the heat-work/electricity conversion cycle condenser 15;
the other path of the outlet of the first turbine/expander 7 provides a heat source for the medical wastewater heating and high-temperature and high-pressure steam disinfection chamber 31, and specifically, the other path of the outlet of the first turbine/expander 7 is connected with a heat source side inlet of a first heat exchanger 28 through a pipeline with a first valve 27, a heat source side outlet of the first heat exchanger 28 is connected with a heat source side inlet of a second heat exchanger 33, a heat source side outlet of the second heat exchanger 33 is connected with a heat source side inlet of a third heat exchanger 16, a cold source side inlet of the second heat exchanger 33 is connected with a second water inlet 35 through a second water pump 34, and a cold source side outlet of the second heat exchanger 33 is connected with a steam spray head of the high-temperature and high-pressure steam disinfection chamber 31 through a pipeline with a third valve 32.
According to the structure, the energy utilization process and the principle of the invention are as follows:
1. medical wastewater enters a buffer tank 30 from a medical wastewater inlet 39, is pressurized by a first water pump 29, absorbs heat in a first heat exchanger 28, is preheated and then enters a near/supercritical water oxidation reactor 6; water may be injected into the surge tank 30 through a water inlet one 40 to adjust the medical wastewater to a target concentration.
2. Air enters the multistage air compressor through the air inlet 1, the pressurized air also enters the near/supercritical water oxidation reactor 6, and the near/supercritical water oxidation reaction is carried out on the pressurized air and medical wastewater, so that the pressurized air and the medical wastewater are changed into high-temperature and high-pressure gas or substances in a near/supercritical state.
3. The high-temperature and high-pressure gas or the near/supercritical state substance obtained after the reaction firstly passes through a turbine/expander I7, and is expanded in the turbine/expander I7 to do work, so that a generator I8 is pushed to generate electricity, and a part of energy is recovered in the form of electric energy; the exhaust gas at the outlet of the first turbine/expander 7 is divided into two paths: after the pressure of one path of the waste water is regulated by a first valve 27, the medical waste water which is about to enter the near/supercritical water oxidation reactor 6 is preheated by a first heat exchanger 28; then the heat is released through a second heat exchanger 33, and the steam entering the high-temperature high-pressure steam disinfection chamber 31 is generated through heating; the other path passes through a thermal power/electricity conversion circulating evaporator 19 to provide a heat source for a thermal power/electricity conversion subsystem, then is mixed with the first path of steam after heat release, releases heat in a heat exchanger III 16, enters a gas-liquid separator 18 after pressure is adjusted through a valve II 17, and is separated into a liquid product 37 (clean water) and a gaseous product 36 in the gas-liquid separator 18.
4. The thermoelectric/power conversion subsystem absorbs heat through the thermal power/power conversion circulating evaporator 19, releases the heat through the thermal power/power conversion circulating condenser 15, is pressurized through the working medium pump 20, and drives the second generator 10 to generate power through the second turbine/expander 9.
5. After entering from the cooling water inlet 11, the condensed water is divided into 3 strands, the condensed water absorbs heat respectively through the first interstage cooler 12, the second interstage cooler 13 and the heat-work/electricity conversion circulating condenser 15, then the fluids are combined, the heat is absorbed again through the third heat exchanger 16, and the generated hot water flows out to the heat source 38 of the hot users in the hospital community to be used by the hot users in the hospital community.
6. After the normal temperature water flows in from the water inlet II 35, the normal temperature water is pressurized by the water pump II 34, absorbs heat in the heat exchanger II 33, adjusts the pressure through the valve III 32, enters the high-temperature high-pressure steam disinfection chamber 31, and disinfects the medical device in the high-temperature high-pressure steam disinfection chamber 31. The liquid produced after cooling flows into the buffer tank 30, and enters the near/supercritical water oxidation reactor 6 together with the medical wastewater for purification treatment.
In a more preferred embodiment of the present invention, it further comprises:
a low-temperature medicine storage chamber 24;
the refrigeration subsystem provides the cold source for low temperature medicine conservator 24, and it includes refrigeration cycle condenser 14 and refrigeration cycle evaporimeter 21, refrigeration cycle condenser 14's cold source side entry linkage cooling water entry 11, the cold source side entry of three 16 of cold source side exit linkage heat exchanger, refrigeration cycle evaporimeter 21's heat source side entry linkage refrigeration cycle condenser 14's heat source side export and the two still advance and be provided with refrigeration cycle throttle valve 22, refrigeration cycle evaporimeter 21's heat source side exit linkage air compressor four 5's entry, air compressor four 5's exit linkage refrigeration cycle condenser 14's heat source side entry, refrigeration cycle evaporimeter 21's cold source side export is divided into two the tunnel, connects low temperature medicine conservator cold source 23 and hospital community cold user cold source 26 respectively, and hospital community cold user cold source 26's entrance is provided with valve four 25, and low temperature medicine conservator cold source 23 and hospital community cold user cold source 26's exit linkage refrigeration cycle evaporimeter 21 The cold source side inlet.
According to this configuration, in the aforementioned step 5, the condensed water is divided into 4 streams after entering from the cooling water inlet 11, and the streams are combined to enter the heat exchanger three 16 after absorbing heat through the first interstage cooler 12, the second interstage cooler 13, the refrigeration cycle condenser 14, and the thermal/electric conversion cycle condenser 15, respectively. In the refrigeration subsystem, the refrigeration cycle evaporator 21 absorbs heat, the refrigeration cycle condenser 14 releases the heat, the air compressor four 5 performs pressurization, and the refrigeration cycle throttle valve 22 is used for throttling.
In the invention, the thermoelectric/power conversion subsystem can be an organic Rankine cycle system or a supercritical carbon dioxide cycle system in different forms; the working medium is one or a mixture of more of water, a refrigerant, organic matters, carbon dioxide and other single substances, and the working medium of the refrigeration subsystem is a single-component refrigerant or a mixture of a plurality of refrigerants.
In the invention, the turbine/expander I7, the turbine/expander II 9, the air compressor I2, the air compressor II 3, the air compressor III 4 and the air compressor IV 5 can be coaxial or non-coaxial according to the specific spatial layout of the system.
In the invention, the steam amount of the high-temperature high-pressure steam sterilizing chamber 31 can be adjusted through the first valve 27; the distribution of cold between cold source 23 of the cryogenic drug holding room and cold source 26 of the hospital community cold user can be regulated by valve four 25. In winter, when the hospital community has no other cold requirement, the valve IV 25 can be closed, the rotating speed of the air compressor IV 5 is reduced, and the system only generates cold required by maintaining low-temperature medicine storage.
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 6 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 are divided into two parts after energy recovery is carried out by driving a generator I8 through a turbine/expander I7: one part of the high-temperature high-pressure medical equipment enters a high-temperature high-pressure steam disinfection chamber 31 of the medical equipment after the pressure of the high-temperature high-pressure water vapor is regulated by a valve III 32 by preheating medical wastewater which is about to enter a near/supercritical water oxidation reactor 6 in a heat exchanger I28 and then generating high-temperature high-pressure water vapor through a heat exchanger II 33, so that the medical equipment is disinfected at high temperature and high pressure; the other part supplies heat to the heat-work/electricity conversion system through the heat-work/electricity conversion circulating evaporator 19, and the heat-work/electricity conversion system drives the second generator 10 to generate electric energy through the second turbine/expander 9. In addition, the comprehensive energy utilization system provides cold energy for the medicine bottle storage room through the cold source 23 of the low-temperature medicine storage room and provides other cold for the hospital/community through the cold source 26 of the hospital community cold user through the vapor compression refrigeration cycle; hot water is provided through a first interstage cooler 12, a second interstage cooler 13, a refrigeration cycle condenser 14, a thermal power/electric conversion cycle condenser 15 and a third heat exchanger 16, and is used for heating 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 central heating, central heating and the like while finishing the medical wastewater treatment. The heat load, the electric load, the cold load and the wastewater load in the system are mutually coupled and mutually influenced, and the cooperative regulation and control of the electric load, the heat load, the cold load and the wastewater load of the whole system can be realized by the modes of initial energy distribution, subsystem thermal parameter adjustment and the like, and the flexible control of the system in different climatic environments and different seasons is realized.
Claims (6)
1. A hospital comprehensive energy system for medical wastewater energy utilization comprises:
a high-temperature high-pressure steam sterilizing chamber (31);
the inlet of the near/supercritical water oxidation reactor (6) is connected with the outlet of the multistage air compressor and the outlet of the heated medical wastewater, and pressurized air and the heated medical wastewater undergo a near/supercritical water oxidation reaction to obtain high-temperature and high-pressure gas or near/supercritical state substances;
the first turbine/expander (7) is connected with the outlet of the near/supercritical water oxidation reactor (6) and drives the first generator (8) to generate electricity, and the outlet of the first turbine/expander (7) is divided into two paths;
the thermoelectric/power conversion subsystem is connected with one path of the outlet of the first turbine/expander (7) and performs thermoelectric/power conversion by using a heat source of the thermoelectric/power conversion subsystem, and the other path of the outlet of the first turbine/expander (7) provides a heat source for heating medical wastewater and a high-temperature and high-pressure steam disinfection chamber (31);
a low-temperature medicine storage chamber (24);
a refrigeration subsystem providing a cold source for the cryogenic drug holding chamber (24);
the device is characterized in that an outlet of the high-temperature and high-pressure steam disinfection chamber (31) is connected with a buffer tank (30), the buffer tank (30) is provided with a medical wastewater inlet (39) and a water inlet I (40), an outlet of the buffer tank (30) is connected with a cold source side inlet of a heat exchanger I (28) through a water pump I (29), and a cold source side outlet of the heat exchanger I (28) is connected with an inlet of a near/supercritical water oxidation reactor (6); the other path of the outlet of the first turbine/expander (7) is connected with a heat source side inlet of a first heat exchanger (28), a heat source side outlet of the first heat exchanger (28) is connected with a heat source side inlet of a second heat exchanger (33), a heat source side outlet of the second heat exchanger (33) is connected with a heat source side inlet of a third heat exchanger (16), a cold source side inlet of the second heat exchanger (33) is connected with a second water inlet (35) through a second water pump (34), and a cold source side outlet of the second heat exchanger (33) is connected with a steam spray head of the high-temperature high-pressure steam disinfection chamber (31);
the refrigeration subsystem comprises a refrigeration cycle condenser (14) and a refrigeration cycle evaporator (21), a cold source side inlet of the refrigeration cycle condenser (14) is connected with the cooling water inlet (11), a cold source side outlet is connected with a cold source side inlet of the heat exchanger III (16), the heat source side inlet of refrigeration cycle evaporator (21) is connected with the heat source side outlet of refrigeration cycle condenser (14), the heat source side outlet of refrigeration cycle evaporator (21) is connected with the inlet of air compressor four (5), the outlet of air compressor four (5) is connected with the heat source side inlet of refrigeration cycle condenser (14), the cold source side outlet of refrigeration cycle evaporator (21) is divided into two paths, respectively connected with low-temperature medicine preservation room cold source (23) and hospital community cold user cold source (26), and the outlet of low-temperature medicine preservation room cold source (23) and hospital community cold user cold source (26) is connected with the cold source side inlet of refrigeration cycle evaporator (21).
2. The hospital comprehensive energy system for medical wastewater energy utilization according to claim 1, wherein the multistage air compressor adopts an interstage cooling mode and comprises a first air compressor (2), a first interstage cooler (12), a second air compressor (3), a second interstage cooler (13) and a third air compressor (4) which are connected in series in sequence, an inlet of the first air compressor (2) is connected with the air inlet (1), an outlet of the third air compressor (4) is connected to an inlet of the supercritical water oxidation reactor (6), cold source side inlets of the first interstage cooler (12) and the second interstage cooler (13) are connected with the cooling water inlet (11), and cold source side outlets are connected with a cold source side inlet of the third heat exchanger (16).
3. The hospital comprehensive energy system for medical wastewater energy utilization according to claim 1, wherein the thermoelectric/power conversion subsystem comprises a thermal power/power conversion cycle condenser (15) and a thermal power/power conversion cycle evaporator (19), one path of the outlet of the first turbine/expander (7) is connected with the heat source side inlet of the thermal power/power conversion cycle evaporator (19), the heat source side outlet of the thermal power/power conversion cycle evaporator (19) is connected with the heat source side inlet of the third heat exchanger (16), the cold source side inlet of the thermal power/power conversion cycle condenser (15) is connected with the cooling water inlet (11), the cold source side outlet of the third heat exchanger (16) is connected with the cold source side inlet of the third heat exchanger (16), the heat source side outlet of the thermal power/power conversion cycle condenser (15) is connected with the cold source side inlet of the thermal power/power conversion cycle evaporator (19) through the working medium pump (20), the cold source side outlet of the thermal power/electricity conversion circulating evaporator (19) is connected with the inlet of a turbine/expander II (9) of the generator II (10), and the outlet of the turbine/expander II (9) is connected with the heat source side inlet of the thermal power/electricity conversion circulating condenser (15).
4. The hospital comprehensive energy system for the energy utilization of the medical wastewater as claimed in any one of claims 1, 2 or 3, wherein the cold source side outlet of the heat exchanger III (16) is connected with the hot source (38) of the hospital community hot user, and the hot source side outlet is connected with the gas-liquid separator (18).
5. The hospital comprehensive energy system for the energy utilization of medical wastewater according to claim 4, characterized in that a refrigeration cycle throttle valve (22) is provided between a heat source side inlet of the refrigeration cycle evaporator (21) and a heat source side outlet of the refrigeration cycle condenser (14).
6. The hospital integrated energy system for the energy utilization of medical wastewater according to claim 4, wherein the thermoelectric/power conversion subsystem is an organic Rankine cycle system or a supercritical carbon dioxide cycle system; the working medium of the refrigeration subsystem is one or more of water, a refrigerant, an organic matter and carbon dioxide, and the working medium of the refrigeration subsystem is a single-component refrigerant or a mixture of a plurality of refrigerants.
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