CN113548705A - Heat exchange system and method for continuous wastewater treatment in biosafety laboratory - Google Patents
Heat exchange system and method for continuous wastewater treatment in biosafety laboratory Download PDFInfo
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- CN113548705A CN113548705A CN202111025127.5A CN202111025127A CN113548705A CN 113548705 A CN113548705 A CN 113548705A CN 202111025127 A CN202111025127 A CN 202111025127A CN 113548705 A CN113548705 A CN 113548705A
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0012—Recuperative heat exchangers the heat being recuperated from waste water or from condensates
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
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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
The invention discloses a heat exchange system and a heat exchange method for continuous wastewater treatment in a biological safety laboratory, and belongs to the technical field of wastewater treatment. This heat exchange system is including the double-deck double-pipe heat exchanger one that is located the waste water inlet to and the valve one of soft water filling port, the double-deck sleeve pipe on the double-deck double-pipe heat exchanger one divide into inside pipeline and outside pipeline, and the inside pipeline of double-deck double-pipe heat exchanger one passes through stainless steel pipeline fixedly connected with heating device's import pipeline, and heating device's export pipeline passes through stainless steel pipeline fixedly connected with heat preservation coil pipe. This heat exchange system preheats soft water through setting up electric heater unit, can preheat the waste water that continuous type effluent disposal system started the initial stage, again through heating device secondary heating to inactivation temperature, realizes cascaded heating, has solved waste water heating initial stage temperature and has promoted difficulty and the too big difficult problem of heating device power to the too big problem that appears the scale deposit of pipeline difference in temperature has been avoided.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a continuous wastewater treatment heat exchange system for a biological safety laboratory and a use method thereof.
Background
At present, the wastewater treatment modes in a biological safety laboratory mainly comprise a continuous mode and a sequencing batch mode. The continuous wastewater treatment occupies a smaller area than the sequencing batch wastewater treatment, and is favored by partial small laboratories.
In the prior art, the continuous wastewater treatment equipment heats wastewater in a pipeline to over 121 ℃ mainly in an electric heating or steam heating mode, and discharges the wastewater after heat preservation and sterilization. However, in any heating mode, the recovery of heat energy is considered, otherwise, the energy loss is extremely high, and great economic loss is brought to the operation of a laboratory. However, in the continuous wastewater treatment system, when recovering heat energy, the heat energy is usually recovered by waiting for the wastewater to be heated and then flowing into the heat exchanger at the discharge end, and at the initial start-up stage of the system, the wastewater has a low temperature and cannot be directly heated to the inactivation temperature or the pipeline is easily scaled due to the excessive power of the heating device.
In order to solve the problems, a heat exchange system for continuous wastewater treatment in a biosafety laboratory and a using method thereof are provided.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a continuous waste water treatment heat exchange system for a biological safety laboratory, which can effectively improve the biological safety protection capability of the system and simultaneously realize the purpose of quick heat energy recovery by using soft water as an intermediate medium for heat exchange.
In order to achieve the technical purpose, the inventor combined with the working experience of biosafety laboratories for years provides the following technical scheme after diligent attempts and innovations: a heat exchange system for continuous wastewater treatment in a biosafety laboratory comprises a first double-layer sleeve heat exchanger positioned at a wastewater inlet and a first valve at a soft water filling port, wherein a double-layer sleeve on the first double-layer sleeve heat exchanger is divided into an inner pipeline and an outer pipeline;
an internal pipeline of the first double-layer double-pipe heat exchanger is fixedly connected with an inlet pipeline of a heating device through a stainless steel pipeline, an outlet pipeline of the heating device is fixedly connected with an inlet pipeline of a heat preservation coil pipe through a stainless steel pipeline, an outlet pipeline of the heat preservation coil pipe is fixedly connected with an internal pipeline of a second double-layer double-pipe heat exchanger through a stainless steel pipeline, a water outlet of the internal pipeline of the second double-layer double-pipe heat exchanger is connected with a wastewater discharge port, and the first double-layer double-pipe heat exchanger is sequentially communicated with the heating device, the heat preservation coil pipe and the internal pipeline of the second double-layer double-pipe heat exchanger;
the external pipeline of the first double-layer sleeve heat exchanger is communicated with the soft water filling port through a first valve, and a circulating pump, a pressure sensor, a second valve, a first pressure stabilizing tank, an external pipeline of the double-layer sleeve heat exchanger, a second temperature sensor, a fourth valve, a first temperature sensor, a safety valve and a second pressure stabilizing tank are sequentially arranged on the stainless steel pipeline connected with the external pipeline of the first double-layer sleeve heat exchanger and form a circulating loop.
Further optimize this technical scheme, the double-deck sleeve pipe on double-deck double-pipe heat exchanger one and the double-deck double-pipe heat exchanger two is equallyd divide for inside pipe and outside pipeline, lead to waste water in the inside pipe for waste water treatment, lead to soft water in the outside pipeline for the soft water heat exchange.
According to the technical scheme, a third valve is arranged on the stainless steel pipeline between the pressure sensor and the second valve, a seventh valve is arranged on the stainless steel pipeline between the temperature sensor and the fourth valve, and an electric heating device is arranged on the stainless steel pipeline between the third valve and the seventh valve.
Further optimize this technical scheme, still set gradually valve five, valve six and discharge valve on the stainless steel pipeline between temperature sensor one and the valve four, valve five, valve six and discharge valve communicate through the stainless steel pipeline.
Further optimize this technical scheme, be provided with valve eight between surge tank two and the double-deck double-pipe heat exchanger outside pipeline, the one end and the steam inlet of valve eight communicate for disinfect the soft water pipeline.
In addition, the invention also provides a heat exchange method in the continuous wastewater treatment process of the biosafety laboratory, wherein the heat exchange system is preheated by adopting electric heating in the initial heating stage, so that the stepped heating of the wastewater treatment is realized, and the problems that the temperature in the initial heating stage of the wastewater is difficult to rise and the pipeline is easy to scale due to overlarge temperature difference are solved. Specifically, the method for performing heat exchange by using the heat exchange system for continuous wastewater treatment in the biosafety laboratory comprises the following steps: when soft water is filled in a pipeline of a heat exchange system and preparation work is carried out for later heat exchange, the method comprises the following steps:
s1, opening a valve I, a valve II, a valve III, a valve IV, a valve V and a valve VII, closing a valve VI, injecting soft water into a pipeline of the heat exchange system through the valve I, starting a circulating pump, gradually discharging gas in the pipeline at an exhaust valve, closing the valve I after 10 minutes, and filling the pipeline with the soft water;
and S2, controlling the first valve and the sixth valve to enable the value of the pressure sensor to be 1.5 +/-0.1 bar, if the pressure is higher than the interval, closing the first valve, and repeatedly opening and closing the sixth valve at intervals of 500ms to enable the value of the pressure sensor to be reduced to be within the target range.
In S2, if the pressure of the pressure sensor is lower than the threshold, closing the valve six, repeatedly opening and closing the valve one at intervals of 500ms to increase the pressure to the target range, and after the adjustment is completed, closing the valve five to completely close the soft water inlet and outlet.
The application method of the continuous heat exchange system for wastewater treatment in the biosafety laboratory is further optimized, before an inactivation program is started, the second valve and the fourth valve of the heat exchange system are closed, the third valve and the seventh valve of the heat exchange system are opened, the electric heating device is started, the circulating pump is started, the numerical value of the first temperature sensor is controlled to be between 100 ℃ and 110 ℃, the temperature range can be matched and adjusted according to the hardware condition of the system, and after primary heat exchange is ensured, the heating device can heat wastewater to the inactivation temperature.
The use method of the continuous heat exchange system for wastewater treatment in the biosafety laboratory is further optimized, when the inactivation program of the heat exchange system is started, wastewater enters an inner pipeline of the double-layer sleeve heat exchanger I to exchange heat with soft water in an outer pipeline of the double-layer sleeve heat exchanger I, the preheated wastewater is heated to the inactivation temperature through the heating device, the inactivation temperature is set to be 134-160 ℃, the wastewater flows into the heat preservation coil pipe, the heat preservation coil pipe enables the inflow wastewater to flow out after more than 20 minutes, and pathogenic microorganisms in the wastewater are killed.
The use method of the continuous waste water treatment heat exchange system for the biological safety laboratory is further optimized, high-temperature waste water flowing out of the rear end of the heat-insulating coil enters an inner pipeline of the double-layer double-pipe heat exchanger II to exchange heat with soft water in the outer pipeline of the double-layer double-pipe heat exchanger, when the numerical value in the temperature sensor II reaches 100-110 ℃, the valve II and the valve IV are opened, the valve III and the valve VII are closed, and the electric heating device is closed, so that the soft water circularly flows in the double-layer double-pipe heat exchanger I and the double-layer double-pipe heat exchanger II, and the soft water serves as an intermediate medium, and the heat exchange between the heat of the inactivated high-temperature waste water and the low-temperature waste water before inactivation can be realized.
Compared with the prior art, the invention provides a continuous waste water treatment heat exchange system for a biological safety laboratory, which has the following beneficial effects:
(1) in the initial stage of system startup sterilization, the electric heating device preheats soft water, can preheat wastewater in the initial stage of startup of the continuous wastewater treatment system, and then secondarily heats the wastewater to the inactivation temperature through the heating device, so that stepped heating is realized, the problem of difficulty in temperature rise in the initial stage of wastewater heating is solved, and the problem of scaling caused by large temperature difference of pipelines due to overlarge power of the heating device is solved.
(2) According to the invention, the inactivated high-temperature wastewater is subjected to heat exchange with the soft water in the second outer layer pipeline of the double-layer sleeve heat exchanger, and then the heat is transferred to the non-inactivated wastewater in the inner layer pipeline of the first double-layer sleeve heat exchanger, so that heat energy recovery is realized.
Drawings
FIG. 1 is a schematic view of a continuous wastewater treatment heat exchange system for biosafety laboratories in accordance with the present invention;
in the figure: 1. a double-layer sleeve heat exchanger I; 2. a first valve; 3. a circulation pump; 4. a heating device; 5. a heat preservation coil pipe; 6. a pressure sensor; 7. a second valve; 8. a first pressure stabilizing tank; 9. a third valve; 10. an electric heating device; 11. a second double-layer sleeve heat exchanger; 12. a second temperature sensor; 13. a fourth valve; 14. a fifth valve; 15. a sixth valve; 16. an exhaust valve; 17. a seventh valve; 18. a first temperature sensor; 19. a safety valve; 20. a second pressure stabilizing tank; 21. and (8) valve eight.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1, a heat exchange system for continuous wastewater treatment in a biosafety laboratory comprises a first double-layer sleeve heat exchanger 1 positioned at a wastewater inlet and a first valve 2 at a soft water injection port, wherein a double-layer sleeve on the first double-layer sleeve heat exchanger 1 is divided into an inner pipeline and an outer pipeline;
an inner pipeline of the double-layer double-pipe heat exchanger I1 is fixedly connected with an inlet pipeline of a heating device 4 through a stainless steel pipeline, an outlet pipeline of the heating device 4 is fixedly connected with an inlet pipeline of a heat preservation coil pipe 5 through the stainless steel pipeline, an outlet pipeline of the heat preservation coil pipe 5 is fixedly connected with an inner pipeline of a double-layer double-pipe heat exchanger II 11 through the stainless steel pipeline, a water outlet of the inner pipeline of the double-layer double-pipe heat exchanger II 11 is connected with a wastewater discharge port, and the double-layer double-pipe heat exchanger I1 is sequentially communicated with the heating device 4, the heat preservation coil pipe 5 and the inner pipeline of the double-layer double-pipe heat exchanger II 11;
the external pipeline of the double-layer casing heat exchanger 1 is communicated with the soft water filling port through a valve I2, and a circulating pump 3, a pressure sensor 6, a valve II 7, a pressure stabilizing tank I8, a double-layer casing heat exchanger II 11 external pipeline, a temperature sensor II 12, a valve IV 13, a temperature sensor I18, a safety valve 19 and a pressure stabilizing tank II 20 are sequentially arranged on the stainless steel pipeline connected with the external pipeline of the double-layer casing heat exchanger 1 and form a circulating loop. The two surge tanks are used to stabilize the pressure of the soft water, which may cause pressure changes in the pipe due to temperature changes of the soft water, and the safety valve 19 may prevent the pressure from being too high.
The heat exchange system for continuous waste water treatment heats waste water to high temperature (above 121 ℃) and keeps the temperature for 20 minutes or more, thereby achieving the purpose of inactivation. And (3) carrying out heat exchange on the inactivated high-temperature wastewater and soft water in the outer pipeline of the double-layer double-pipe heat exchanger II 11, and then transferring heat to the inactivated wastewater in the inner pipeline of the double-layer double-pipe heat exchanger I1 to realize heat energy recovery.
Specifically, the double-layer sleeve pipe on the double-layer sleeve pipe heat exchanger 1 and the double-layer sleeve pipe heat exchanger 11 is equally divided into an inner pipeline and an outer pipeline, waste water is led into the inner pipeline for wastewater treatment, and soft water is led into the outer pipeline for soft water heat exchange.
Specifically, a third valve 9 is arranged on the stainless steel pipeline between the pressure sensor 6 and the second valve 7, a seventh valve 17 is arranged on the stainless steel pipeline between the first temperature sensor 18 and the fourth temperature sensor 13, and an electric heating device 10 is arranged on the stainless steel pipeline between the third valve 9 and the seventh valve 17.
Specifically, a valve five 14, a valve six 15 and an exhaust valve 16 are further sequentially arranged on the stainless steel pipeline between the temperature sensor one 18 and the valve four 13, and the valve five 14, the valve six 15 and the exhaust valve 16 are communicated through the stainless steel pipeline.
Specifically, a valve eight 21 is arranged between the second surge tank 20 and the external pipeline of the first double-layer double-pipe heat exchanger 1, and one end of the valve eight 21 is communicated with a steam inlet and used for disinfecting a soft water pipeline.
In addition, this embodiment has still provided biological safety laboratory continuous type waste water treatment in-process heat exchange method, adopts electrical heating to preheat heat exchange system at the heating initial stage, realizes waste water treatment's cascaded heating, has solved the waste water heating initial stage temperature and has promoted the difficult problem of difficulty and the too big easy scale deposit of pipeline difference in temperature. Specifically, the method for performing heat exchange by using the heat exchange system for continuous wastewater treatment in the biosafety laboratory comprises the following steps: when soft water is filled in a pipeline of a heat exchange system and preparation work is carried out for later heat exchange, the method comprises the following steps:
s1, opening the valve I2, the valve II 7, the valve III 9, the valve IV 13, the valve V14 and the valve VII 17, closing the valve VI 15, injecting soft water into the pipeline of the heat exchange system through the valve I2, starting the circulating pump, gradually discharging gas in the pipeline at the exhaust valve 16, closing the valve I2 after 10 minutes, and filling the pipeline with the soft water;
and S2, controlling the first valve 2 and the sixth valve 15 to enable the value of the pressure sensor 6 to be 1.5 +/-0.1 bar, if the pressure is higher than the interval, closing the first valve 2, and repeatedly opening and closing the sixth valve 15 at intervals of 500ms to enable the value of the pressure sensor 6 to be reduced to be within the target range.
Specifically, in S2, if the numerical pressure of the pressure sensor 6 is lower than the interval, the valve six 15 is closed, the valve one 2 is repeatedly opened and closed at intervals of 500ms to increase the pressure to the target range, and after the adjustment is completed, the valve five 14 is closed to completely close the soft water inlet and outlet.
Specifically, before the heat exchange system starts an inactivation program, the second valve 7 and the fourth valve 13 are closed, the third valve 9 and the seventh valve 17 are opened, the electric heating device 10 is started, the circulating pump 3 is started, the numerical value of the first temperature sensor 18 is controlled to be between 100 ℃ and 110 ℃, the temperature interval can be matched and adjusted according to the hardware condition of the system, and after primary heat exchange is ensured, the heating device 4 can heat the wastewater to the inactivation temperature.
Specifically, when the heat exchange system starts an inactivation program, wastewater enters an inner pipeline of a first double-layer double-pipe heat exchanger 1 and exchanges heat with soft water in an outer pipeline of the first double-layer double-pipe heat exchanger 1, the preheated wastewater is heated to an inactivation temperature through a heating device 4, the inactivation temperature is set to be 134-160 ℃, the wastewater flows into a heat preservation coil pipe 5, the heat preservation coil pipe 5 enables the inflowing wastewater to flow out after more than 20 minutes, and pathogenic microorganisms in the wastewater are killed.
Specifically, the high-temperature wastewater flowing out of the rear end of the heat-insulating coil 5 enters an inner pipeline of a double-layer double-pipe heat exchanger II 11 to exchange heat with soft water in an outer pipeline of the double-layer double-pipe heat exchanger II 11, when a numerical value in a temperature sensor II 12 reaches 100-110 ℃, a valve II 7 and a valve IV 13 are opened, a valve III 9 and a valve VII 17 are closed, and an electric heating device 10 is closed, so that the soft water circularly flows in the double-layer double-pipe heat exchanger I1 and the double-layer double-pipe heat exchanger II 11, and the soft water serves as an intermediate medium, so that heat exchange between the heat of the inactivated high-temperature wastewater and the low-temperature wastewater before inactivation can be realized.
Example two:
according to the heat exchange system for continuous wastewater treatment in the biosafety laboratory, the embodiment provides a disinfection method of the heat exchange system, which comprises the following steps: and (3) closing the valve I2, opening the valve II 7, the valve III 9, the valve IV 13, the valve V14, the valve VI 15, the valve VII 17 and the valve VIII 21, and discharging the soft water to the waste water collecting tank through steam pressure. After a certain time, after the soft water is completely discharged, the valve five 14 is intermittently opened and closed in a mode of closing the valve five 14, and the valve is opened for five and half seconds every 30 seconds to discharge the condensed water in the pipeline, so that the heat exchange system is sterilized.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A continuous heat exchange system for wastewater treatment in a biosafety laboratory is characterized by comprising a first double-layer sleeve heat exchanger (1) positioned at a wastewater inlet and a first valve (2) at a soft water filling port, wherein a double-layer sleeve on the first double-layer sleeve heat exchanger (1) is divided into an inner pipeline and an outer pipeline;
an inner pipeline of the double-layer double-pipe heat exchanger I (1) is fixedly connected with an inlet pipeline of a heating device (4) through a stainless steel pipeline, an outlet pipeline of the heating device (4) is fixedly connected with an inlet pipeline of a heat-insulating coil (5) through a stainless steel pipeline, an outlet pipeline of the heat-insulating coil (5) is fixedly connected with an inner pipeline of a double-layer double-pipe heat exchanger II (11) through a stainless steel pipeline, a water outlet of the inner pipeline of the double-layer double-pipe heat exchanger II (11) is connected with a wastewater discharge port, and the double-layer double-pipe heat exchanger I (1) is sequentially communicated with the heating device (4), the heat-insulating coil (5) and the inner pipeline of the double-layer double-pipe heat exchanger II (11);
the external pipeline of the double-layer casing heat exchanger (1) is communicated with the soft water filling port through the first valve (2), and a circulating pump (3), a pressure sensor (6), a second valve (7), a first surge tank (8), a second double-layer casing heat exchanger (11) external pipeline, a second temperature sensor (12), a fourth valve (13), a first temperature sensor (18), a safety valve (19) and a second surge tank (20) are sequentially arranged on the stainless steel pipeline connected with the external pipeline of the double-layer casing heat exchanger (1) and form a circulating loop.
2. The heat exchange system for continuous wastewater treatment in biosafety laboratory according to claim 1, wherein the double-layer sleeve on the first double-layer sleeve heat exchanger (1) and the second double-layer sleeve heat exchanger (11) is divided into an inner pipeline and an outer pipeline, the inner pipeline is internally communicated with wastewater for wastewater treatment, and the outer pipeline is internally communicated with soft water for soft water heat exchange.
3. The heat exchange system for continuous wastewater treatment in a biosafety laboratory according to claim 1, wherein a third valve (9) is arranged on the stainless steel pipeline between the pressure sensor (6) and the second valve (7), a seventh valve (17) is arranged on the stainless steel pipeline between the first temperature sensor (18) and the fourth valve (13), and an electric heating device (10) is arranged on the stainless steel pipeline between the third valve (9) and the seventh valve (17).
4. The heat exchange system for continuous wastewater treatment in a biosafety laboratory according to claim 1, wherein a valve five (14), a valve six (15) and an exhaust valve (16) are further sequentially arranged on the stainless steel pipeline between the temperature sensor one (18) and the valve four (13), and the valve five (14), the valve six (15) and the exhaust valve (16) are communicated through the stainless steel pipeline.
5. The heat exchange system for continuous wastewater treatment in biosafety laboratories according to claim 1, wherein a valve eight (21) is provided between the surge tank two (20) and the external pipe of the double-walled tube heat exchanger one (1), and one end of the valve eight (21) is communicated with the steam inlet for sterilizing the flexible water pipe.
6. A method of using the heat exchange system for continuous wastewater treatment in biosafety laboratories according to claim 1, wherein the method comprises the following steps when filling the pipes of the heat exchange system with soft water in preparation for subsequent heat exchange:
s1, opening a valve I (2), a valve II (7), a valve III (9), a valve IV (13), a valve V (14) and a valve VII (17), closing a valve VI (15), injecting soft water into a pipeline of the heat exchange system through the valve I (2), starting a circulating pump, gradually discharging gas in the pipeline at an exhaust valve (16), closing the valve I (2) after 10 minutes, and filling the pipeline with the soft water;
and S2, controlling the first valve (2) and the sixth valve (15) to enable the value of the pressure sensor (6) to be 1.5 +/-0.1 bar, if the pressure is higher than the interval, closing the first valve (2), and repeatedly opening and closing the sixth valve (15) at intervals of 500ms to enable the value of the pressure sensor (6) to be reduced to be within a target range.
7. The method of using a heat exchange system for continuous wastewater treatment in biosafety laboratories according to claim 6, wherein in S2, if the pressure of the pressure sensor (6) is lower than the threshold, the valve six (15) is closed, the valve one (2) is repeatedly opened and closed at intervals of 500ms to raise the pressure to the target range, and after the adjustment is completed, the valve five (14) is closed to completely close the soft water inlet and outlet.
8. The use method of the heat exchange system for continuous wastewater treatment in the biosafety laboratory according to claim 6, characterized in that before starting the inactivation program, the second valve (7) and the fourth valve (13) are closed, the third valve (9) and the seventh valve (17) are opened, the electric heating device (10) is started, the circulating pump (3) is started, the value of the first temperature sensor (18) is controlled to be between 100 ℃ and 110 ℃, the temperature range can be matched and adjusted according to the hardware condition of the system, and after primary heat exchange, the heating device (4) can heat the wastewater to the inactivation temperature.
9. The use method of the heat exchange system for continuous wastewater treatment in the biosafety laboratory according to claim 6, characterized in that when an inactivation program is started, wastewater enters an inner pipeline of the double-layer sleeve heat exchanger I (1) to exchange heat with soft water in an outer pipeline of the double-layer sleeve heat exchanger I (1), the preheated wastewater is heated to an inactivation temperature which is set to be 134-160 ℃ through the heating device (4), and then flows into the heat-insulating coil (5), the heat-insulating coil (5) enables the inflowing wastewater to flow out after more than 20 minutes, and pathogenic microorganisms in the wastewater are killed.
10. The use method of the heat exchange system for continuous wastewater treatment in the biosafety laboratory according to claim 9, wherein the high-temperature wastewater flowing out of the rear end of the heat-insulating coil (5) enters the inner pipeline of the second double-layer double-pipe heat exchanger (11) to exchange heat with the soft water in the outer pipeline of the second double-layer double-pipe heat exchanger (11), when the value in the second temperature sensor (12) reaches 100-110 ℃, the second valve (7) and the fourth valve (13) are opened, the third valve (9) and the seventh valve (17) are closed, the electric heating device (10) is closed, the soft water is made to circularly flow in the first double-layer double-pipe heat exchanger (1) and the second double-layer double-pipe heat exchanger (11), and the soft water is used as an intermediate medium to exchange heat between the heat of the inactivated high-temperature wastewater and the low-temperature wastewater before inactivation.
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| CN112266035A (en) * | 2020-10-23 | 2021-01-26 | 湖北恒丰医疗制药设备有限公司 | Biological wastewater continuous inactivation treatment equipment |
| CN215288054U (en) * | 2021-09-01 | 2021-12-24 | 中国科学院武汉病毒研究所 | Biological safety laboratory continuous type heat exchange system for waste water treatment |
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