CN114210195B - Gas-liquid separation membrane biological deodorization equipment and method - Google Patents

Gas-liquid separation membrane biological deodorization equipment and method Download PDF

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Publication number
CN114210195B
CN114210195B CN202111327749.3A CN202111327749A CN114210195B CN 114210195 B CN114210195 B CN 114210195B CN 202111327749 A CN202111327749 A CN 202111327749A CN 114210195 B CN114210195 B CN 114210195B
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gas
fiber membrane
odor
hollow fiber
liquid separation
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CN114210195A (en
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常江
赵珊
郭学彬
彭浩
郝书峰
白金
闫睿
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Beijing Drainage Technology Co ltd
Beijing Drainage Group Co Ltd
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Beijing Drainage Technology Co ltd
Beijing Drainage Group Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/84—Biological processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D49/00—Separating dispersed particles from gases, air or vapours by other methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/48—Sulfur compounds
    • B01D53/52—Hydrogen sulfide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • B01D53/58—Ammonia
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/02—Aerobic processes
    • C02F3/12—Activated sludge processes
    • C02F3/1236—Particular type of activated sludge installations
    • C02F3/1268—Membrane bioreactor systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Molecular Biology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Treating Waste Gases (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention discloses a gas-liquid separation membrane biological deodorization device and a method, which relate to the field of sewage treatment and comprise the following steps: the odor pretreatment component can remove dust and dehumidify the gas of the odor source; the active sludge storage is internally provided with a hollow fiber membrane component, the hollow fiber membrane component is immersed in active sludge in the active sludge storage, the hollow fiber membrane component comprises two end joints and a plurality of fiber membrane wires, two ends of the fiber membrane wires are respectively connected with the two end joints, the plurality of fiber membrane wires form a beam-shaped structure, and the output end of the odor pretreatment component is communicated with the beam-shaped structure through the end joint at one end; the hollow fiber membrane component is completely immersed in the activated sludge, gas of the malodor source enters the fiber membrane filaments, malodorous substances are adsorbed and converted by the activated sludge through the fiber membrane filaments, and pollution to air is reduced.

Description

Gas-liquid separation membrane biological deodorization equipment and method
Technical Field
The invention belongs to the field of sewage treatment, and in particular relates to a gas-liquid separation membrane biological deodorization device and a method.
Background
The urban sewage plant is used for carrying important tasks such as sewage purification, water environment improvement, water pollution prevention and the like. However, as the organic substances in the sewage can be putrefactive to emit malodorous gas, the main components in the malodor are H2S, NH3 and other special malodorous substances, which is unpleasant and even harmful to the health. H2S is a toxic gas, has irritation and asphyxia, not only endangers human health, but also corrodes equipment, and reduces the service life of the equipment. NH3 is colorless gas with strong irritation, and can damage respiratory tract mucous membrane of human body after long-term contact, is easy to suffer from diseases such as pharyngitis and rhinitis, and if discharged into air, PM2.5 can be formed with sulfide and nitride in the air, so that air pollution is caused.
The biological deodorization method mainly comprises a biological filtration method, a biological washing method, a biological drip filtration method and a method for directly introducing waste gas into an aeration tank. The method of directly introducing the waste gas into the aeration tank is to directly introduce the waste gas collected from the grating, grit chamber, anaerobic tank, sludge concentration and dehydration chamber, etc. into the aeration tank, and the organic odor substances are absorbed by the activated sludge in the aeration tank and then decomposed. Its main advantages are simple process, low cost, but poor deodorizing effect, and the sewage biochemical treatment in aeration tank may be affected to some extent (such as over-aeration phenomenon), and the aeration tank becomes a serious source of odor diffusion. Therefore, there are great limitations in its application. The biological trickling filtration method utilizes the organic matters of microbial degradation metabolism as inorganic matters to treat the waste gas. By artificially creating an environment suitable for the survival and reproduction of microorganisms, the microorganisms are propagated in a large quantity, so that the efficiency of oxidative decomposition of organic matters is improved. The biological reaction for removing malodorous gas is carried out by using plastic pellets, ceramics, charcoal, plastics, bark and other materials as filter materials to adhere deodorizing microorganisms on the filter materials. The structure of the equipment is complex, and equipment such as water supplementing, water draining, spray water, filler bearing, nutrient salt supplementing and the like are needed to be configured; certain amount of operation management and maintenance are required, and particularly in cold winter, the problems of frost cracking of a circulating water pipe, low treatment efficiency of microorganisms at low temperature, fog drops carried by discharged gas and the like are outstanding. Biological washing and biological filtration methods also have similar problems as biological drip filtration.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a gas-liquid separation membrane biological deodorization device and a method, wherein a hollow fiber membrane component is completely immersed in activated sludge, gas of a malodor source enters fiber membrane filaments, malodorous substances are adsorbed and converted by the activated sludge through the fiber membrane filaments, and pollution to air is reduced.
In order to achieve the above object, the present invention provides a gas-liquid separation membrane bio-deodorization apparatus comprising:
the odor pretreatment component can remove dust and dehumidify the gas of the odor source;
the activated sludge treatment device comprises an activated sludge reservoir, wherein a hollow fiber membrane component is arranged in the activated sludge reservoir and immersed in activated sludge in the activated sludge reservoir, the hollow fiber membrane component comprises two end joints and a plurality of fiber membrane filaments, two ends of the fiber membrane filaments are respectively connected with the two end joints, the plurality of fiber membrane filaments form a bundle-shaped structure, and the output end of the odor pretreatment component is communicated with the bundle-shaped structure through the end joints at one end.
Optionally, the fiber membrane filaments are polytetrafluoroethylene, the inner diameter of the fiber membrane filaments is 0.4mm, the outer diameter of the fiber membrane filaments is not more than 1mm, the hydrophobic contact angle of the fiber membrane filaments is more than 110 degrees, the fiber membrane filaments are provided with holes, and the aperture is 0.2 μm.
Optionally, the odor pretreatment component comprises an inlet pipeline, and a first fan, a dust remover and a dehumidifier which are sequentially arranged on the inlet pipeline, wherein one end of the inlet pipeline is used for being connected with an odor source, and the other end of the inlet pipeline is connected with the end joint of one end.
Optionally, a first gas flowmeter is arranged at the front end of the first fan, and an air inlet valve is arranged between the dehumidifier and the end joint of the one end.
Optionally, a first gas detection device is arranged between the dehumidifier and the air inlet valve, and the first gas detection device comprises an air inlet pressure detection meter and an air inlet humidity detection meter.
Optionally, the first fan is an axial flow fan, a centrifugal fan or a Roots blower.
Optionally, the end connector at the other end is provided with an outlet pipeline, and an outlet valve and a second gas flowmeter are sequentially arranged on the outlet pipeline.
Optionally, a second gas detection device is arranged between the gas outlet valve and the second gas flowmeter, and the second gas detection device comprises a gas outlet pressure detection meter and a gas outlet humidity detection meter.
The invention also provides a gas-liquid separation membrane biological deodorization method, which comprises the following steps of:
dedusting and dehumidifying the gas of the malodor source;
and introducing the gas of the odor source subjected to dust removal and dehumidification into a hollow fiber membrane module immersed in the activated sludge.
Optionally, the method further comprises:
detecting the gas flow rates before and after the gas of the malodor source enters the hollow fiber membrane module respectively;
the pressure and humidity of the malodor source gas before and after entering the hollow fiber membrane module are detected, respectively.
The invention provides a gas-liquid separation membrane biological deodorization device and a method, which have the beneficial effects that:
1. the biological deodorization equipment with the gas-liquid separation membrane adopts a hollow fiber membrane component with a bundle structure formed by fiber membrane filaments, and is used as a gas-liquid separation membrane, gas of a malodor source is transferred into a municipal activated sludge reservoir in a gas phase form, malodorous substances are quickly absorbed and subsequently converted by utilizing life motions of microorganisms, and main components nitrogen and oxygen in the malodor are not easily absorbed, so that clean air is converted from a liquid phase back to a gas phase, and is released into the ambient air in the gas form, and pollution to the air is reduced;
2. compared with the traditional biological deodorization equipment, the gas-liquid separation membrane biological deodorization equipment has the advantages that the structure is simpler, the operation management and maintenance workload is small, the deodorization equipment utilizes abundant activated sludge resources of municipal sewage treatment plants, the installation range can be in municipal sewage treatment plants or other sewage treatment plant stations with activated sludge, the development process route is simple, and the daily maintenance work of hollow fiber membrane components is less;
3. the gas-liquid separation membrane biological deodorization equipment has the advantages that the pipeline does not need to be exposed outdoors, and the problems that the traditional biological deodorization is easy to occur in cold winter, the circulating water pipe is frozen and cracked, the microorganism treatment efficiency is reduced at low temperature, and fog drops are carried by discharged gas are thoroughly solved;
4. according to the gas-liquid separation membrane biological deodorization equipment, the hollow fiber membrane component is immersed in the activated sludge reservoir, so that the occupied area of the deodorization equipment is reduced, spraying and heating in winter are not needed, and the electricity consumption is obviously reduced;
5. according to the gas-liquid separation membrane biological deodorization method, the gas of the malodor source is discharged into the hollow fiber membrane assembly, and the effective contact area is greatly increased through the contact of the microporous gas phase and the microbial liquid phase, so that the stay time of the malodor source gas in the hollow fiber membrane assembly is greatly shortened on the premise of ensuring the higher removal rate of malodorous substances.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular descriptions of exemplary embodiments of the invention as illustrated in the accompanying drawings wherein like reference numbers generally represent like parts throughout the exemplary embodiments of the invention.
Fig. 1 shows a schematic structure of a gas-liquid separation membrane bio-deodorization device according to an embodiment of the present invention.
FIG. 2 illustrates a cross-sectional view of a hollow fiber membrane module in accordance with one embodiment of the present invention.
Fig. 3 shows a schematic structural view of a cross section of a hollow fiber membrane module according to an embodiment of the present invention.
Reference numerals illustrate:
1. an activated sludge reservoir; 2. a hollow fiber membrane module; 3. an end fitting; 4. a fibrous membrane filament; 5. an inlet line; 6. a first fan; 7. a dust remover; 8. a dehumidifier; 9. a first gas flow meter; 10. an air inlet valve; 11. a first gas detection device; 12. an outlet line; 13. an air outlet valve; 14. a second gas flow meter; 15. a second gas detection device.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the preferred embodiments of the present invention are described below, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention provides a gas-liquid separation membrane biological deodorization device, which comprises:
the odor pretreatment component can remove dust and dehumidify the gas of the odor source;
the activated sludge storage device comprises an activated sludge storage device, wherein a hollow fiber membrane component is arranged in the activated sludge storage device and immersed in activated sludge in the activated sludge storage device, the hollow fiber membrane component comprises two end joints and a plurality of fiber membrane filaments, two ends of the fiber membrane filaments are respectively connected with the two end joints, the plurality of fiber membrane filaments form a bundle-shaped structure, and the output end of the odor pretreatment component is communicated with the bundle-shaped structure through the end joint at one end.
Specifically, the gas-liquid separation membrane biological deodorization equipment comprises an odor pretreatment component and an activated sludge reservoir, wherein the odor source gas is subjected to dust removal and dehumidification through the odor pretreatment component, the odor source gas is ensured to meet the expected treatment requirement, then enters into the hollow fiber membrane component, the hollow fiber membrane component is immersed in activated sludge, the odor source gas is converged through an end joint at one end and flows into a bundle-shaped structure formed by a plurality of fiber membrane filaments, the odor source gas flows in the fiber membrane filaments, and the odor substance permeates out of the fiber membrane filaments in a gas phase form by utilizing the life activities of microorganisms and is absorbed and converted by the activated sludge, so that the pollution to air is reduced.
Optionally, the fiber membrane filaments are polytetrafluoroethylene, the inner diameter of the fiber membrane filaments is 0.4mm, the outer diameter of the fiber membrane filaments is not more than 1mm, the hydrophobic contact angle of the fiber membrane filaments is more than 110 degrees, the fiber membrane filaments are self-provided with holes, and the aperture is 0.2 mu m.
Specifically, the fiber membrane silk is made of polytetrafluoroethylene, the fiber membrane silk is in a tubular structure, the inner diameter is 0.4mm, the outer diameter is not more than 1mm, the hydrophobic contact angle is more than 110 degrees, the surface of the fiber membrane silk is provided with a hole, the aperture is 0.2 mu m, water cannot pass through the hole, but gas can pass through the hole, when gas of a malodor source flows in the fiber membrane silk, the malodor substance passes through the hole on the fiber membrane silk in a gas phase state and is absorbed and converted by activated sludge, but clean air cannot produce adsorption reaction with the activated sludge, finally flows out of the hollow fiber membrane assembly through an end joint at the other end and is released into the environment, the gas-liquid separation membrane biological deodorization equipment combines the hollow fiber membrane assembly as a gas-liquid separation membrane with biological deodorization by the activated sludge, the respective technical advantages are exerted, the pollution to the air is reduced, and the utilization value of the activated sludge is improved; in addition, polytetrafluoroethylene fiber membrane is often used in biomedical or environmental municipal applications, but because polytetrafluoroethylene is capable of interacting with malodorous material H 2 S、NH 3 The gas-liquid separation effect is realized, so that polytetrafluoroethylene is adopted as the fiber membrane yarn, the removal rate of odor substances can be realized under the state of activated sludge aeration, the residence time of the gas of the odor source in the hollow fiber membrane assembly can be greatly shortened, and the deodorizing efficiency is improved.
In one embodiment, the fiber membrane filaments may be made of other materials, but it is desirable to ensure that the hydrophobic contact angle of the material is greater than 100 °, that malodorous substances permeate from the fiber membrane filaments in the vapor phase, are absorbed and converted by the activated sludge.
Optionally, the odor pretreatment component comprises an inlet pipeline, a first fan, a dust remover and a dehumidifier which are sequentially arranged on the inlet pipeline, wherein one end of the inlet pipeline is used for being connected with the odor source, and the other end of the inlet pipeline is connected with an end joint of one end.
Specifically, the odor pretreatment component comprises an inlet pipeline, a first fan, a dust remover and a dehumidifier, wherein one end of the inlet pipeline is communicated with a container filled with sewage and is used for collecting gas of an odor source, and the first fan drives the gas of the odor source to flow in the gas-liquid separation membrane biological deodorization equipment so that the gas of the odor source is contacted and permeated with fiber membrane group wires; the dust remover can filter particle impurities in the gas of the malodor source, so that the particles are prevented from blocking holes on the surface of the fiber membrane filaments; the dehumidifier needs to remove moisture before the odor substances enter the fiber membrane threads because the gas water content of the odor source generated by the municipal sewage plant is higher, so that the phenomenon that the accumulation of liquid water in the fiber membrane threads influences the gas passing area and the treatment effect in the fiber membrane threads is avoided.
Optionally, a first gas flowmeter is arranged at the front end of the first fan, and an air inlet valve is arranged between the dehumidifier and an end joint at one end.
Specifically, the first gas flowmeter measures the gas flow of the malodor source entering the inlet pipeline, and in the biological treatment process of the hollow fiber membrane component, a stable gas film layer is formed on the surface of the fiber membrane filaments instead of bubbles, so that malodorous substances can be adsorbed by activated sludge through the holes of the fiber membrane filaments; an inlet valve is provided on the inlet line, and the pressure of the malodorous source gas in the inlet line is adjusted by adjusting the inlet valve when the device is in operation.
Optionally, a first gas detection device is arranged between the dehumidifier and the air inlet valve, and the first gas detection device comprises an air inlet pressure detection meter and an air inlet humidity detection meter.
Specifically, a first gas detection device can be further arranged on the inlet pipeline, the first gas detection device comprises an air inlet pressure detection meter and an air inlet humidity detection meter, and the pressure difference before and after monitoring is stable by comparing the measured gas pressure of the malodor source with the air outlet pressure detection meter on the outlet pipeline; the air humidity in the inlet pipeline is monitored by the air humidity detection meter to be less than 70%, so that condensation water drops are not generated by the hollow fiber membrane component.
Optionally, the first fan is an axial flow fan, a centrifugal fan or a Roots blower.
Specifically, the first fan can adopt any one of an axial flow fan, a centrifugal fan or a Roots fan, and the fans can be purchased directly, so that the technology is mature, the performance is stable, the working efficiency of the gas-liquid separation membrane biological deodorization equipment is improved, and the economic cost of the deodorization equipment is effectively controlled.
Optionally, the other end connector is provided with an outlet pipeline, and the outlet pipeline is sequentially provided with an air outlet valve and a second gas flowmeter.
Specifically, the other end joint of the hollow fiber membrane component is connected with the external environment through an outlet pipeline, an air outlet valve and a second air flow meter are arranged on the outlet pipeline, and when the gas-liquid separation membrane biological deodorization equipment stops running, the air inlet valve and the air outlet valve are all closed, so that certain gas phase pressure in the equipment is ensured, the fiber membrane filaments are prevented from being wetted, and the normal passing of odor substances from the holes of the fiber membrane filaments is influenced; and monitoring the value of the second gas flowmeter, which is approximately equal to the gas quantity of the first gas flowmeter, and monitoring whether the operation state of the gas-liquid separation membrane biological deodorization equipment is normal.
Optionally, a second gas detection device is arranged between the gas outlet valve and the second gas flowmeter, and the second gas detection device comprises a gas outlet pressure detection meter and a gas outlet humidity detection meter.
Specifically, a second gas detection device is arranged on the outlet pipeline, the values of the air outlet humidity detection meter and the air inlet humidity detection meter are approximate, and if the value of the air outlet humidity detection meter is obviously increased, the fact that the fiber membrane filaments are damaged is indicated, and the vacuum fiber membrane component needs to be replaced.
The invention also provides a gas-liquid separation membrane biological deodorization method, which comprises the following steps of:
dedusting and dehumidifying the gas of the malodor source;
and introducing the gas of the odor source subjected to dust removal and dehumidification into a hollow fiber membrane module immersed in the activated sludge.
Specifically, the gas-liquid separation membrane biological deodorization method adopts the gas-liquid separation membrane biological deodorization equipment, and dust and dehumidification treatment is carried out on the gas of the malodor source in the malodor pretreatment component, so that the phenomenon that the gas of the malodor source blocks holes on fiber membrane filaments and liquid water is accumulated on the fiber membrane filaments to influence the gas passing area in the fiber membrane filaments and the treatment effect of malodorous substances is avoided; the vacuum fiber membrane component is immersed in the activated sludge, so that the odor substances are absorbed and converted through biological reaction and physical reaction, the pollution to air is reduced, the fiber membrane filaments and the activated sludge are combined together, the respective technical advantages are brought into play, and compared with the method that the odor source gas stays in the traditional biological deodorization filling layer for 5 s-30 s, the method for biological deodorization of the enterprise separation membrane is shortened to about 0.12s in the hollow fiber membrane filaments, and the deodorization efficiency is improved.
Optionally, the method further comprises:
detecting the gas flow before and after the gas of the malodor source enters the hollow fiber membrane module respectively;
the pressure and humidity of the malodor source gas before and after entering the hollow fiber membrane module are detected, respectively.
Specifically, detecting gas flow data of the malodor source before and after entering the hollow fiber membrane module, and controlling the pressure difference between the gas and the liquid in the biological deodorization treatment process of the hollow fiber membrane module so as to form a stable air film layer instead of bubbles on the surface of the membrane, thereby ensuring that malodorous substances can pass through the holes of the fiber membrane filaments; detecting the pressure and humidity values of the malodor source before and after entering, knowing whether water drops in the hollow fiber membrane component are coagulated and whether fiber membrane wires are damaged, knowing the running condition of the deodorizing equipment in time, and ensuring deodorizing efficiency.
Examples
As shown in fig. 1 to 3, the present invention provides a gas-liquid separation membrane bio-deodorization apparatus comprising:
the odor pretreatment component can remove dust and dehumidify the gas of the odor source;
the activated sludge treatment device comprises an activated sludge reservoir 1, wherein a hollow fiber membrane component 2 is arranged in the activated sludge reservoir 1, the hollow fiber membrane component 2 is immersed in activated sludge in the activated sludge reservoir 1, the hollow fiber membrane component 2 comprises two end joints 3 and a plurality of fiber membrane filaments 4, two ends of the fiber membrane filaments 4 are respectively connected with the two end joints 3, the plurality of fiber membrane filaments 4 form a bundle-shaped structure, and the output end of the odor pretreatment component is communicated with the bundle-shaped structure through the end joint 3 at one end.
In this embodiment, the fiber membrane filaments 4 are polytetrafluoroethylene, the inner diameter of the fiber membrane filaments 4 is 0.4mm, the outer diameter of the fiber membrane filaments 4 is not more than 1mm, the hydrophobic contact angle of the fiber membrane filaments 4 is more than 110 °, the fiber membrane filaments 4 are themselves porous, and the pore diameter is 0.2 μm.
In this embodiment, the odor pretreatment assembly comprises an inlet line 5, and a first fan 6, a dust remover 7 and a dehumidifier 8 sequentially disposed on the inlet line, wherein one end of the inlet line 5 is used for being connected with an odor source, and the other end of the inlet line 5 is connected with an end connector 4 of one end.
In this embodiment, a first gas flow meter 9 is provided at the front end of the first fan 6, and an intake valve 10 is provided between the dehumidifier 8 and the end connector 4 at one end.
In the present embodiment, a first gas detection device 11 is provided between the dehumidifier 8 and the intake valve 10, and the first gas detection device 11 includes an intake pressure detection gauge and an intake humidity detection gauge.
In this embodiment, the first fan 6 is an axial flow fan, a centrifugal fan, or a Roots blower.
In this embodiment, the other end connector 4 is provided with an outlet line 12, and an outlet valve 13 and a second gas flow meter 14 are sequentially provided on the outlet line 12.
In the present embodiment, a second gas detection device 15 is provided between the gas outlet valve 13 and the second gas flow meter 14, and the second gas detection device 15 includes a gas outlet pressure detection meter and a gas outlet humidity detection meter.
The invention also provides a gas-liquid separation membrane biological deodorization method, which comprises the following steps of:
dedusting and dehumidifying the gas of the malodor source;
and introducing the gas of the odor source subjected to dust removal and dehumidification into the hollow fiber membrane module 2 immersed in the activated sludge.
In this embodiment, further comprising:
detecting the gas flow rate before and after the gas of the malodor source enters the hollow fiber membrane module 2 respectively;
the pressure and humidity of the malodor source gas before and after entering the hollow fiber membrane module 2 are detected, respectively.
In summary, the deodorizing device is used for deodorizing the gas of the malodor source, the first fan 6 is started, and the first fan 6, the air inlet valve 10 and the air outlet valve 13 are adjusted, so that the deodorizing device achieves the design air quantity, and the values displayed by the first gas flowmeter 9 and the second gas flowmeter 14 are approximate; then, the dust remover 7 and the dehumidifier 8 are started to remove fog drops firstly, then the temperature is reduced by 5-10 ℃, condensed water is removed, and then the temperature is increased by 5-10 ℃, so that unsaturated moisture gas is formed, the moisture content in the gas of the malodor source is reduced, the humidity value of the first gas detection equipment 11 is less than 70%, the gas phase pressure of the malodor source is ensured to be less than the liquid phase pressure of activated sludge by 0.2-0.5 bar, the stay time of the gas of the malodor source in the hollow fiber membrane assembly 2 is shortened to about 0.12s, the removal rate of hydrogen sulfide and ammonia of malodorous substances can reach 92.88% and 93.18%, the deodorizing efficiency is improved, and the pollution to the ambient air is reduced.
The foregoing description of embodiments of the invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various embodiments described.

Claims (5)

1. A gas-liquid separation membrane biological deodorization apparatus, comprising:
the odor pretreatment component can remove dust and dehumidify the gas of the odor source;
the system comprises an activated sludge reservoir, wherein a hollow fiber membrane component is arranged in the activated sludge reservoir, the hollow fiber membrane component is immersed in activated sludge in the activated sludge reservoir, the hollow fiber membrane component comprises two end joints and a plurality of fiber membrane wires, two ends of the fiber membrane wires are respectively connected with the two end joints, the plurality of fiber membrane wires form a bundle-shaped structure, and the output end of the odor pretreatment component is communicated with the bundle-shaped structure through the end joint at one end;
the odor pretreatment component comprises an inlet pipeline, and a first fan, a dust remover and a dehumidifier which are sequentially arranged on the inlet pipeline, wherein one end of the inlet pipeline is used for being connected with an odor source, and the other end of the inlet pipeline is connected with the end joint of one end;
the front end of the first fan is provided with a first gas flowmeter, and an air inlet valve is arranged between the dehumidifier and the end joint of one end;
a first gas detection device is arranged between the dehumidifier and the air inlet valve, and comprises an air inlet pressure detection meter and an air inlet humidity detection meter;
the end joint at the other end is provided with an outlet pipeline, and an air outlet valve and a second gas flowmeter are sequentially arranged on the outlet pipeline;
and a second gas detection device is arranged between the gas outlet valve and the second gas flowmeter, and comprises a gas outlet pressure detection meter and a gas outlet humidity detection meter.
2. The gas-liquid separation membrane bio-deodorization device according to claim 1, wherein the fiber membrane filaments are polytetrafluoroethylene, the inner diameter of the fiber membrane filaments is 0.4mm, the outer diameter of the fiber membrane filaments is not more than 1mm, the hydrophobic contact angle of the fiber membrane filaments is more than 110 degrees, the fiber membrane filaments are inherently porous, and the pore diameter is 0.2 μm.
3. The gas-liquid separation membrane bio-deodorization device according to claim 1, wherein the first fan is an axial flow fan, a centrifugal fan or a roots fan.
4. A gas-liquid separation membrane bio-deodorization method using the gas-liquid separation membrane bio-deodorization apparatus according to any one of claims 1 to 3, characterized by comprising:
dedusting and dehumidifying the gas of the malodor source;
and introducing the gas of the odor source subjected to dust removal and dehumidification into a hollow fiber membrane module immersed in the activated sludge.
5. The gas-liquid separation membrane bio-deodorization method according to claim 4, further comprising:
detecting the gas flow rates before and after the gas of the malodor source enters the hollow fiber membrane module respectively;
the pressure and humidity of the malodor source gas before and after entering the hollow fiber membrane module are detected, respectively.
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JP2001212421A (en) * 2000-02-02 2001-08-07 Okabe Kinzoku Kk Deodorizing method and device therefor
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