CN105289237A - Intelligent compound malodorous gas treatment method with super-high efficiency - Google Patents
Intelligent compound malodorous gas treatment method with super-high efficiency Download PDFInfo
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Abstract
The invention discloses an intelligent compound malodorous gas treatment method with super-high efficiency. The method comprises the steps that an electronic control unit is used for controlling one or more of a plurality of stages of gas treatment units to be opened according to the components and concentration of the malodorous gas to be treated, which is detected by a gas online monitoring and feedback unit arranged at an inlet of a gas inlet pipe; a gas online monitoring and feedback unit arranged at a gas outlet of a discharge unit is used for detecting whether the gas to be discharged meets the set discharge standards; if the gas to be discharged meets the set discharge standards, the electronic control unit is used for controlling a three-way diverter valve to discharge the gas up to the standard via an exhaust pipe; and if the gas to be discharged does not meet the set discharge standards, the electronic control unit is used for controlling the three-way diverter valve to transmit the gas not up to the standard to the inlet of the gas inlet pipe via a gas return pipe to retreat the gas not up to the standard. The method can adapt to fluctuation of odor source strength in different seasons and weather, is stable in operation, is energy-saving, is simple and flexible in process switching and has a high odor concentration removal rate.
Description
Technical field
The present invention relates to foul gas processing technology field, relate to a kind of ultra high efficiency intelligent combined type foul gas processing method particularly.
Background technology
Foul gas pollutes and refers to that all stimulate olfactory organ to cause the gaseous matter of people's unhappiness and infringement living environment, as the typical environmental hazard of one by countries in the world are generally acknowledged, many developed countries it can be used as a kind of single-row public hazards to study, and control is implemented in special legislation.In recent years, China more and more payes attention to monitoring to stench and control, and people's environment amenable demand of living is more and more stronger.
Municipal sewage plant, sewage pumping station, Treatment of Sludge factory, mud and refuse landfill, refuse transfer station, destructor plant, night soil-treatment factory, cultivation factory, slaughterhouse etc. the foul gas such as discharging such as hydrogen sulfide, ammonia, methyl mercaptan, first sulphur hydrogen, trimethylamine, methyl sulfide, methyl disulfide, carbon disulfide and styrene that throughout the year exceeds standard pollutes surrounding enviroment, factory group is particularly thorny, complain constantly, cause plot to devalue, investment value is had a strong impact on.
In existing odor treatment industry, single deodorization process and equipment more, as biological deodorizing, washing deodorizing, charcoal absorption, Photolytic deodorization etc., the odor removal efficient of single deodorizing device is limited, generally below 99%, runs many deficient in stabilities.And practice show part stench release place add a cover close after odor concentration (extension rate required when foul gas odorless clean air carries out being diluted to just odorless) even higher than 1,000,000, both odor concentration had been made to remove 99%, be still 10000, contrast national standard, polluting factory circle is still difficult to up to standard, this is just provided with odor removal from explaining on the one hand the why polluted place majority such as sewage treatment plant, and factory's group's contradiction remains unchanged distinct issues.
Therefore, how organic combination odor treatment kinds of processes, invent a kind of ultra high efficiency deodorizing and be combined into covering device, odor concentration clearance reaches more than 99.99%, just has outstanding meaning.Certainly, also the equipment birth of different deodorization technology means being merged and realizing composite deodurizing is had at present, but mostly structure and function are arranged unreasonable, gas discharging indices is difficult to break through, stability is not enough, be difficult to the fluctuation adapting to Various Seasonal weather foul smell source strength concentration, the method for operation also lacks flexible property.
Summary of the invention
The object of the present invention is to provide a kind of ultra high efficiency intelligent combined type foul gas processing method, can adapt to the fluctuation of Various Seasonal weather foul smell source strength concentration, stable, energy-conservation, technique switches simple, flexible, and odor concentration clearance is high.
In order to achieve the above object, the present invention is achieved through the following technical solutions: a kind of ultra high efficiency intelligent combined type foul gas processing method, the intelligent combined type foul gas processing unit of ultra high efficiency is adopted to realize, be characterized in, the intelligent combined type foul gas processing unit of ultra high efficiency comprises, air admission unit, described air admission unit comprises air inlet pipe; And, successively by some grades of air processing units that pipeline connects; The air inlet pipe of described air admission unit is connected to the air inlet of every one-level air processing unit respectively by pipeline; Exhaust unit, is connected by pipeline with the gas outlet of afterbody air processing unit; Three-way flow divider valve, its air inlet is connected by pipeline with the gas outlet of described exhaust unit, and two gas outlets of described three-way flow divider valve connect blast pipe and muffler respectively, and described muffler is connected to the entrance of air inlet pipe by pipeline; Two gas on-line monitoring feedback units judging gas component and concentration, one of them is arranged on the porch of air inlet pipe, and another is arranged on the gas outlet place of exhaust unit; ECU, is electrically connected with air processing unit at different levels, three-way flow divider valve and two gas on-line monitoring feedback units respectively; This foul gas processing method, comprises following steps:
The component of the pending foul gas that ECU detects according to the gas on-line monitoring feedback unit being arranged on air inlet pipe porch and concentration, control the one or more unlatchings in some grades of air processing units;
The gas on-line monitoring feedback unit being arranged on exhaust unit gas outlet place detects the discharge standard whether gas to be discharged meets setting;
If meet the discharge standard of setting, then gas up to standard is got rid of via blast pipe by ECU control three-way flow divider valve;
If do not meet the discharge standard of setting, then ECU controls below standard gas is delivered to air inlet pipe by three-way flow divider valve porch via muffler, carries out reprocessing to below standard gas.
The intelligent combined type foul gas processing unit of described ultra high efficiency also comprises an air exhauster, on the pipeline that the gas outlet that described air exhauster is arranged on afterbody air processing unit is connected with exhaust unit.
The intelligent combined type foul gas processing unit of described ultra high efficiency also comprises an air exhauster, and described air exhauster is arranged on the pipeline that air inlet pipe is connected with the air inlet of first order air processing unit.
Described exhaust unit is aiutage or soil filter tank.
The intelligent combined type foul gas processing unit of described ultra high efficiency comprises Pyatyi air processing unit, and wherein, first order air processing unit is washing deodorizing complete set of equipments; Second level air processing unit is biological deodorizing complete set of equipments; Third level air processing unit is Photolytic deodorization complete set of equipments; Fourth stage air processing unit is charcoal absorption deodorizing complete set of equipments; Level V air processing unit is ion deodorization integrated equipment.
Described ultra high efficiency intelligent combined type foul gas processing unit also comprises the first adjustable volume control damper of several opening angles, circuit is connected to ECU respectively, on the pipeline that the first described volume control damper upper level air processing unit is connected with next stage air processing unit.
The intelligent combined type foul gas processing unit of described ultra high efficiency also comprises one and surmounts unit; The described unit that surmounts comprises and surmounts pipeline, surmount pipeline is connected to air processing unit gas outlet at different levels respectively pipeline by some branch roads, and each branch road being provided with the second adjustable volume control damper of opening angle, circuit is connected to ECU respectively.
Described air admission unit also comprises the 3rd adjustable volume control damper of several opening angles, and circuit is connected to ECU respectively, and the 3rd described volume control damper is arranged on the pipeline that air inlet pipe is connected with air processing unit air inlet at different levels.
Described gas on-line monitoring feedback unit comprises transmission module on the gas concentration tester and signal that connect successively, and described gas concentration tester is for judging gas component and concentration, and on described signal, transmission module is connected with described ECU.
Described gas concentration tester is concentration of hydrogen sulfide tester or ammonia concentration tester.
A kind of ultra high efficiency of the present invention intelligent combined type foul gas processing method compared with prior art has the following advantages: by multiple foul gas treatment process combination, odor concentration clearance can reach more than 99.99%, high has single deodorizing device far away; By ECU and gas on-line monitoring feedback unit, intelligence the fluctuation of Various Seasonal different weather foul smell source strength component and concentration can be adapted to, stable, ensure the deodorizing compliance rate under least favorable meteorological condition; Intelligence can switch the deodorization process of various combination, simple, flexibly; Energy-saving safe of the present invention, when gas concentration is lower, can closed portion air processing unit, save medicine consumption or water consumption, extension device service life.
Accompanying drawing explanation
Fig. 1 is embodiment one schematic diagram of the intelligent combined type foul gas processing unit of a kind of ultra high efficiency of the present invention;
Fig. 2 is embodiment two schematic diagram of the intelligent combined type foul gas processing unit of a kind of ultra high efficiency of the present invention;
Fig. 3 is the plane of three grades of air processing unit series connection in the intelligent combined type foul gas processing unit of ultra high efficiency;
Fig. 4 is the profile of three grades of air processing unit series connection in the intelligent combined type foul gas processing unit of ultra high efficiency.
Detailed description of the invention
Below in conjunction with accompanying drawing, by describing a preferably specific embodiment in detail, the present invention is further elaborated.
The invention discloses a kind of ultra high efficiency intelligent combined type foul gas processing method, adopt the process of ultra high efficiency intelligent combined type foul gas to realize.Wherein, as shown in Figure 1, the intelligent combined type foul gas processing unit of ultra high efficiency comprises, air admission unit, and described air admission unit comprises air inlet pipe 101; And, successively by some grades of air processing units (201,202,203,204,205) that pipeline connects; The air inlet pipe 101 of described air admission unit is connected to the air inlet of every one-level air processing unit respectively by pipeline; Exhaust unit 300, is connected by pipeline with the gas outlet of afterbody air processing unit; Three-way flow divider valve 400, its air inlet is connected by pipeline with the gas outlet of described exhaust unit 300, two gas outlets of described three-way flow divider valve 400 connect blast pipe 401 and muffler 402 respectively, and described muffler 402 is connected to the entrance of air inlet pipe 101 by pipeline; Two gas on-line monitoring feedback units (901,902) judging gas component and concentration, one of them is arranged on the porch of air inlet pipe 101, and another is arranged on the gas outlet place of exhaust unit 300; ECU 500, is electrically connected with air processing unit at different levels, three-way flow divider valve 300 and two gas on-line monitoring feedback units respectively; ECU 500 can carry out fault diagnosis, warning function automatically.
Based on the intelligent combined type foul gas processing unit of above-mentioned ultra high efficiency, this foul gas processing method, comprises following steps:
The component of the pending foul gas that ECU detects according to the gas on-line monitoring feedback unit being arranged on air inlet pipe porch and concentration, control the one or more unlatchings in some grades of air processing units;
The gas on-line monitoring feedback unit being arranged on exhaust unit gas outlet place detects the discharge standard whether gas to be discharged meets setting;
If meet the discharge standard of setting, then gas up to standard is got rid of via blast pipe by ECU control three-way flow divider valve;
If do not meet the discharge standard of setting, then ECU controls below standard gas is delivered to air inlet pipe by three-way flow divider valve porch via muffler, carries out reprocessing to below standard gas.
In the present embodiment, the intelligent combined type foul gas processing unit of ultra high efficiency also comprises an air exhauster 600, on the pipeline that described air exhauster 600 can select the gas outlet being arranged on the 5th air processing unit 205 to be connected with exhaust unit 400, as shown in Figure 1; Or be arranged on pipeline that air inlet pipe 101 is connected with the air inlet of the first air processing unit 201, as shown in Figure 2; In a preferred embodiment of the invention, air exhauster 600 is frequency conversion fan, adapts to the fluctuation of air quantity and blast.
In the present embodiment, described exhaust unit 300 is aiutage or soil filter tank; Aiutage is for discharge in a organized way; Soil filter tank is uncontrollable discharge, and user can select as required, as Fig. 3 and as shown in Figure 4, is the embodiment adopting aiutage.
In the preferred embodiment, the intelligent combined type foul gas processing unit of ultra high efficiency comprises Pyatyi air processing unit, and wherein, first order air processing unit 201 is washing deodorizing complete set of equipments; Second level air processing unit 202 is biological deodorizing complete set of equipments; Third level air processing unit 203 is Photolytic deodorization complete set of equipments; Fourth stage air processing unit 204 is charcoal absorption deodorizing complete set of equipments; Level V air processing unit 205 is ion deodorization integrated equipment.In other embodiment, air processing unit can be any one in the deodorizing treatment process of washing deodorizing module, biological deodorizing module, Photolytic deodorization module, charcoal absorption deodorizing module, ion deodorization module or other maturations.
In the present embodiment, as shown in Figures 3 and 4, washing deodorizing complete set of equipments, comprises medicament scrubbing tower 2011 and matching instrument, manhole 2012, cat ladder 2013, medicament storage tank 2014, cofferdam 2015, waste liquid tank 2016, dosing pump 2017, turnover cofferdam stair 2018 and connecting line etc.; Preferably, medicament scrubbing tower 2011 adopts the washing agent of the material such as acid & alkali liquid or water, chemical oxidizing agent or cosolvent fully to contact mixing with foul smell, by water-soluble for odorant soluble in gas or make the pollutant in foul smell and the chemical agent generation chemical reaction in washing agent, foul gas is removed, in a preferred embodiment of the invention, medicament scrubbing tower 2011 arranges tail gas demist (not shown) and neutralising arrangement (not shown), prevents from having a negative impact to tandem process.
In the present embodiment, as shown in Figures 3 and 4, biological deodorizing complete set of equipments, comprising biological deodorizing filter tank 2021, steel ladder 2022 and manhole 2023 adopts the organic substances such as leaf, bark, wood chip, soil, peat to make filler, foul smell is the long packing layer having microorganism through surface, foul gas is removed through mass transfer and biodegradation, comprise biofiltration or bio-trickling technique, gas should not be less than 15s by the time of staying of filler, gas speed should not be greater than 200 ~ 500m/h, and individual layer bed stuffing height is no more than 3m; Cold district suitably can increase the void tower time of staying of biological treatment device.
In the present embodiment, as shown in Figures 3 and 4, Photolytic deodorization complete set of equipments, comprise the corollary apparatus such as photolysis device 2031, filter screen, the oxygen acting in conjunction that photolysis device 2031 discharges in the ultraviolet light and air-flow that wavelength is 160 ~ 280nm produces the Strong oxdiative such as ozone, hydroxyl radical free radical active group, is degraded with foul gas generation oxidation reaction.
In the present embodiment; in charcoal absorption deodorizing complete set of equipments, active carbon filler should adopt granular activated carbon; suitable 3 ~ the 4mm of grain diameter; porosity is preferably 0.5-0.65; specific area should not be less than 900m2/g; packed density is preferably 350-550kg/m3, and foul gas is adsorbed in Microporous Structure of Active Carbon, utilizes active-carbon bed medium and catalysed oxidn to be decomposed.
In the present embodiment, in ion deodorization integrated equipment, take ionic tube as ion generating portion part, produce the active group of the higher-energy such as a large amount of hydrogen in statu nascendis, active oxygen and hydroxyl oxygen by ionization or other similar means and foul gas generation oxidation reaction is decomposed.
In the present embodiment, described ultra high efficiency intelligent combined type foul gas processing unit also comprises adjustable the first volume control damper (701,702,703,704) of four opening angles, circuit is connected to ECU 500 respectively, and one is arranged on the pipeline that the first air processing unit 201 is connected with the second air processing unit 202; One is arranged on the pipeline that the second air processing unit 202 is connected with the 3rd air processing unit 203; One is arranged on the pipeline that the 3rd air processing unit 203 is connected with the 4th air processing unit 204; One is arranged on the pipeline that the 4th air processing unit 204 is connected with the 5th air processing unit 205.
In the present embodiment, the intelligent combined type foul gas processing unit of described ultra high efficiency also one surmounts unit, the described unit that surmounts comprises and surmounts pipeline 801, surmount pipeline 801 and be connected to by five branch roads the pipeline that the first air processing unit 201 is connected with the second air processing unit 202 respectively, the pipeline that second air processing unit 202 is connected with the 3rd air processing unit 203, the pipeline that 3rd air processing unit 203 is connected with the 4th air processing unit 204, the pipeline that 4th air processing unit 204 is connected with the 5th air processing unit 205, the pipeline that 5th air processing unit 205 is connected with exhaust unit unit 300, and each branch road is provided with the second adjustable volume control damper (802 of opening angle, 803, 804, 805), circuit is connected to ECU 500 respectively.
In the present embodiment, the air inlet pipe of described air admission unit is drawn from needing the structure of air-draft deodorization (building) building to collect main, air admission unit also comprises adjustable the 3rd volume control damper (102,103,104,105,106) of five opening angles, flow to for controlling foul gas, circuit is connected to ECU 500 respectively, and one is arranged on the pipeline that air inlet pipe 101 is connected with the first air processing unit 201 air inlet; One is arranged on the pipeline that air inlet pipe 101 is connected with the second air processing unit 202 air inlet; One is arranged on the pipeline that air inlet pipe 101 is connected with the 3rd air processing unit 203 air inlet; One is arranged on the pipeline that air inlet pipe 101 is connected with the 4th air processing unit 204 air inlet; One is arranged on the pipeline that air inlet pipe 101 is connected with the 5th air processing unit 205 air inlet.
In the present embodiment, described gas on-line monitoring feedback unit comprises transmission module on the gas concentration tester and signal that connect successively, described gas concentration tester is used for disconnected gas component and concentration, and on described signal, transmission module is connected with described ECU 500; Gas concentration tester includes but not limited to concentration of hydrogen sulfide tester, ammonia concentration tester etc.
In the present invention, each air processing unit can with follow-up air processing unit series operation, also can isolated operation.The air processing unit quantity of series operation as required structure (building) the building foul gas concentration of air-draft deodorization, change of component analysis is determined, or according to change (as maintenance of stopping transport) the flexible combination of air processing unit running status, freely switched, also by hand switch Boiler pressure control Vavle switching by ECU control realization between air processing unit.
Such as, when there being three grades of air processing unit series connection, gas is by washing deodorizing+biological deodorizing+Photolytic deodorization process, also washing deodorizing+biological deodorizing process, washing deodorizing+Photolytic deodorization process or biological deodorizing+Photolytic deodorization process can be switched to, washing deodorizing process separately can also be switched to, independent biological deodorizing process or Photolytic deodorization process separately; Amount to seven kinds of operational modes; Same, during the series connection of Pyatyi air processing unit, there are 31 kinds of operational modes.
In the present invention, user can according to foul gas character and standard compliance rate, flexible selection air processing unit serial number, the odor removal efficient of each inventiona gas treatment module is according to the difference of air-intake component and concentration, can flexible design, reach between 80% ~ 95%, high have single deodorizing device far away.When there being three grades of air processing unit series connection, odor concentration clearance can reach more than 99.99%; When there being Pyatyi air processing unit to connect, odor concentration clearance can reach more than 99.9999%; Air processing unit series design should note the decay of light concentration gas process clearance.
As shown in Figures 3 and 4, in one particular embodiment of the present invention, comprise three grades of air processing units, be respectively washing deodorizing complete set of equipments, biological deodorizing complete set of equipments, Photolytic deodorization complete set of equipments.
During normal operation, first foul gas enters washing deodorizing tower carrying out washing treatment from air inlet pipe and then enters the biodegradation of biological deodorizing filter tank and finally enter Photolytic deodorization device purified treatment, because odor concentration is decayed step by step, actual measurement washing deodorizing, biological deodorizing, Photolytic deodorization odor removal efficient at different levels are respectively 99%, 95%, 80%, and total odor removal efficient is 99.99%.
The in-line meter uploading datas such as the online concentration of hydrogen sulfide tester at air inlet pipe entrance and exhaust unit gas outlet place are to ECU, ECU is according to the concentration of gas before and after device purification, the opening angle of flexible allotment first volume control damper, the second volume control damper and the 3rd volume control damper, makes the operational mode of device switch to washing deodorizing+biological deodorizing+Photolytic deodorization, washing deodorizing+biological deodorizing, biological deodorizing+Photolytic deodorization, washing deodorizing+Photolytic deodorization, wash deodorizing, separately biological deodorizing or Photolytic deodorization process separately separately; If the online concentration of hydrogen sulfide tester at exhaust unit gas outlet place detects that gas does not reach discharge standard, then by ECU control three-way flow divider valve, below standard gas is delivered to the entrance of air inlet pipe, re-starts process.
Although content of the present invention has done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.After those skilled in the art have read foregoing, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (10)
1. a ultra high efficiency intelligent combined type foul gas processing method, adopt the intelligent combined type foul gas processing unit of ultra high efficiency to realize, it is characterized in that, the intelligent combined type foul gas processing unit of ultra high efficiency comprises, air admission unit, described air admission unit comprises air inlet pipe; And, successively by some grades of air processing units that pipeline connects; The air inlet pipe of described air admission unit is connected to the air inlet of every one-level air processing unit respectively by pipeline; Exhaust unit, is connected by pipeline with the gas outlet of afterbody air processing unit; Three-way flow divider valve, its air inlet is connected by pipeline with the gas outlet of described exhaust unit, and two gas outlets of described three-way flow divider valve connect blast pipe and muffler respectively, and described muffler is connected to the entrance of air inlet pipe by pipeline; Two gas on-line monitoring feedback units judging gas component and concentration, one of them is arranged on the porch of air inlet pipe, and another is arranged on the gas outlet place of exhaust unit; ECU, is electrically connected with air processing unit at different levels, three-way flow divider valve and two gas on-line monitoring feedback units respectively; This foul gas processing method, comprises following steps:
The component of the pending foul gas that ECU detects according to the gas on-line monitoring feedback unit being arranged on air inlet pipe porch and concentration, control the one or more unlatchings in some grades of air processing units;
The gas on-line monitoring feedback unit being arranged on exhaust unit gas outlet place detects the discharge standard whether gas to be discharged meets setting;
If meet the discharge standard of setting, then gas up to standard is got rid of via blast pipe by ECU control three-way flow divider valve;
If do not meet the discharge standard of setting, then ECU controls below standard gas is delivered to air inlet pipe by three-way flow divider valve porch via muffler, carries out reprocessing to below standard gas.
2. ultra high efficiency intelligent combined type foul gas processing method as claimed in claim 1, it is characterized in that, the intelligent combined type foul gas processing unit of described ultra high efficiency also comprises an air exhauster, on the pipeline that the gas outlet that described air exhauster is arranged on afterbody air processing unit is connected with exhaust unit.
3. ultra high efficiency intelligent combined type foul gas processing method as claimed in claim 1, it is characterized in that, the intelligent combined type foul gas processing unit of described ultra high efficiency also comprises an air exhauster, and described air exhauster is arranged on the pipeline that air inlet pipe is connected with the air inlet of first order air processing unit.
4. ultra high efficiency intelligent combined type foul gas processing method as claimed in claim 1, it is characterized in that, described exhaust unit is aiutage or soil filter tank.
5. ultra high efficiency intelligent combined type foul gas processing method as claimed in claim 1, it is characterized in that, the intelligent combined type foul gas processing unit of described ultra high efficiency comprises Pyatyi air processing unit, and wherein, first order air processing unit is washing deodorizing complete set of equipments; Second level air processing unit is biological deodorizing complete set of equipments; Third level air processing unit is Photolytic deodorization complete set of equipments; Fourth stage air processing unit is charcoal absorption deodorizing complete set of equipments; Level V air processing unit is ion deodorization integrated equipment.
6. ultra high efficiency intelligent combined type foul gas processing method as claimed in claim 1, it is characterized in that, described ultra high efficiency intelligent combined type foul gas processing unit also comprises the first adjustable volume control damper of several opening angles, circuit is connected to ECU respectively, on the pipeline that the first described volume control damper upper level air processing unit is connected with next stage air processing unit.
7. ultra high efficiency intelligent combined type foul gas processing method as claimed in claim 1, it is characterized in that, the intelligent combined type foul gas processing unit of described ultra high efficiency also comprises one and surmounts unit; The described unit that surmounts comprises and surmounts pipeline, surmount pipeline is connected to air processing unit gas outlet at different levels respectively pipeline by some branch roads, and each branch road being provided with the second adjustable volume control damper of opening angle, circuit is connected to ECU respectively.
8. ultra high efficiency intelligent combined type foul gas processing method as claimed in claim 1, it is characterized in that, described air admission unit also comprises the 3rd adjustable volume control damper of several opening angles, circuit is connected to ECU respectively, and the 3rd described volume control damper is arranged on the pipeline that air inlet pipe is connected with air processing unit air inlet at different levels.
9. ultra high efficiency intelligent combined type foul gas processing method as claimed in claim 1, it is characterized in that, described gas on-line monitoring feedback unit comprises transmission module on the gas concentration tester and signal that connect successively, described gas concentration tester is for judging gas component and concentration, and on described signal, transmission module is connected with described ECU.
10. ultra high efficiency intelligent combined type foul gas processing method as claimed in claim 9, it is characterized in that, described gas concentration tester is concentration of hydrogen sulfide tester or ammonia concentration tester.
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