CN103278344B - Device for measuring comprehensive oxygentransfer performance of aerator in technical state - Google Patents

Abstract

The present invention relates to a kind of device for measuring comprehensive oxygentransfer performance of aerator in technical state, including: inlet gas analyser, before being arranged at blower fan, for measuring the flow of inlet gas, temperature, humidity, O₂And CO₂Content;Described tail gas collecting device, is arranged at above described Aeration tank;Described tail gas collecting device can be with freedom retractable, and described exhaust analyzer is connected with described tail gas collecting device, is arranged at outside Aeration tank, for measuring the flow of tail gas, temperature, CO₂And O₂Content.Use the device for measuring comprehensive oxygentransfer performance of aerator in technical state of the present invention, can effectively measure the utilization rate of oxygen under actual process state, for reflecting the state of the art oxygenation capacity of aerator, can be that assessment and the operation of sewage treatment plant provides theories integration.

Description

Device for measuring comprehensive oxygentransfer performance of aerator in technical state

Technical field

The invention belongs to water-treatment technology field, relate to a kind of device being applied in sewage disposal measure the performance of aeration device.

Background technology

Aeration tank is the core of whole sewage disposal system, and the integrated quality of aerating system directly decides the water quality stability of Sewage Biological Treatment and the height of processing cost.As the core cell of aerating system, the oxygenation capacity of aerator becomes one of requisite item of concern.There are three in order to evaluating the index of aerator oxygenation capacity in industry: oxygenation capacity q_c(kg/h), coefficient of oxygen utilization ε (%) and dynamic efficiency E (kg/ (kW h).In working standard, in the standard (CJ/T3015.2-1993) that only aerator clear water oxygenation capacity measures, and current industry, also tend to the index only with clear water state to assess the performance of aerator.

It is true that the oxygenation capacity of standard state refers to the single aerator oxygenation capacity when atmospheric pressure 0.1MPa, water temperature 20 DEG C to clear water；And actual condition and standard state all there are differences in many-sides such as water quality, environmental factors, physical spaces, the index under clear water state can not accurate response aerator performance in actual applications.It is therefore desirable to measure aerator oxygenation capacity under actual process state, react the actual usefulness of aerator more accurately, thus provide valuable reference to the Selection and Design of aerator and assessment, provide to the operation of sewage treatment plant and support.

Summary of the invention

(1) to solve the technical problem that

Develop the device of a kind of comprehensive oxygenation capacity that can measure aerator under state of the art.

(2) technical scheme

For achieving the above object, the present invention adopts the following technical scheme that.

The invention provides the device of a kind of comprehensive oxygenation capacity measuring aerator under state of the art, including:

Inlet gas analyser, before being arranged at blower fan, for measuring the flow of inlet gas, temperature, humidity, O₂And CO₂Content；

Tail gas collecting device, is arranged at above described Aeration tank, and described tail gas collecting device can freely stretch；

Exhaust analyzer, is connected with described tail gas collecting device, is arranged at outside Aeration tank, for measuring the flow of tail gas, temperature, CO₂And O₂Content.

Preferably, described inlet gas analyser includes spinner flowmeter, pressure transducer, temperature sensor, oxygen sensor, carbon dioxide infrared spectrum analyser and asepwirator pump.

Preferably, described tail gas collecting device is air bag, and air bag bottom is high density rubber spacer, and is furnished with metal heavy burden, plays and keeps lower submerged effect in water, entirety to be supported by retractable stainless steel frame while suspending, and top sets a collection QI KOU.

Preferably, described exhaust analyzer includes gas collector and two parts of gas analyser, and gas collector includes electromagnetic pressure gauge, vacuum source, spinner flowmeter and regulation valve；Gas analyser includes being dried post, oxygen sensor, effusion meter and the purging post of control valve, temperature sensor, carbon dioxide infrared spectrum analyser, carbon dioxide and steam and data analyzer and display floater.

It is highly preferred that described collection QI KOU is connected with gas collector.

(3) beneficial effect

Use the device for measuring comprehensive oxygentransfer performance of aerator in technical state of the present invention, can effectively measure the utilization rate of oxygen under actual process state, for reflecting the state of the art oxygenation capacity of aerator, can be that assessment and the operation of sewage treatment plant provides theories integration.

Accompanying drawing explanation

Fig. 1 is the structural representation of the device for measuring comprehensive oxygentransfer performance of aerator in technical state according to one embodiment of the present invention.

Fig. 2 is device for measuring comprehensive oxygentransfer performance of aerator in technical state schematic diagram.

Wherein, 100 represent gas collector, and 110 represent gas analysis apparatus.

Detailed description of the invention

The present invention proposes, and describes in detail as follows in conjunction with the accompanying drawings and embodiments.

As shown in figure and 1 and 2, according to the comprehensive oxygenation capacity determinator of the aerator under the state of the art of one embodiment of the present invention, including inlet gas analyser, tail gas collecting device and the gas collector before aerator and gas analyser and connect tail gas collecting device and the trachea etc. of gas collector.Before inlet gas analyser is arranged at blower fan, air first passes through gas analyser before entering blower fan and carries out the mensuration of each constituent content, to obtain the relevant parameter of inlet gas, including temperature, humidity, flow, O₂And CO₂Content etc..Then gas aerator in Aeration tank sent into by blower fan, through various transfer conversion processes in Aeration tank, tail gas floats on the surface of the water to be collected by tail gas collecting device 1, and the gas of collection arrives gas collector through trachea.Gas collector includes electromagnetic pressure gauge 2, vacuum source 3, spinner flowmeter 4 and regulation valve 5 etc., for ensureing all tail gas gathered, the flow velocity controlling the pressure in tail gas harvester and gas is extremely important, therefore more accurate electromagnetic pressure gauge is set and measures the change of pressure, regulate rational flow by regulation valve according to on-the-spot practical situation.Gas analyser includes temperature sensor 6, effusion meter and the purging post 9 of control valve 7 and 8, carbon dioxide and steam, oxygen sensor 10, is dried post 11, carbon dioxide infrared spectrum analyser 12 and data analyzer and display floater 13 etc..Oxygen sensor, temperature sensor and carbon dioxide infrared spectrum analyser can be with on-line determination O₂, temperature and CO₂, and measurement result is sent to data analyzer, the value of OTE directly can be shown in board by data analysis.The reason that wherein gas collector and gas analyser are provided separately is the change of aeration rate under reply state of the art, in the gas collecting stage by a series of accurate acquisition arranging guarantee tail gas, and can realize Accurate Determining through rational flow-control by each sensor in the analysis phase, final output result on data analyzer, is truly realized the mensuration of oxygenation capacity comprehensive to aerator under state of the art.

The design principle of this device can be summarized as follows: assuming that the noble gas such as nitrogen in inlet air and argon is stable, the amount of its material does not changes in gas transfer process.The amount mark of oxygen material in dry air is known (0.2095), and the amount mark of this material exists certain proportionate relationship with the amount mark of the material of oxygen in tail gas.We can determine the amount mark of the material of oxygen in tail gas by measuring oxygen, carbon dioxide and the dividing potential drop of steam in tail gas.

$Y_R=0.2095(1-Y_{H_{2}O\left(R\right)})---\left(1\right)$

$Y_{\mathrm{og}}=\left(\frac{{\mathrm{MV}}_{\mathrm{og}}}{{\mathrm{MV}}_R}\right)Y_R---\left(2\right)$

${\mathrm{MR}}_{o/i}=\frac{Y_R}{1-Y_R-Y_{{\mathrm{CO}}_2}\left(R\right)-Y_{H_{2}O\left(R\right)}}---\left(3\right)$

${\mathrm{MR}}_{\mathrm{og}/i}=\frac{Y_{\mathrm{og}}}{1-Y_{\mathrm{og}}-Y_{{\mathrm{CO}}_2\left(\mathrm{og}\right)}-Y_{H_{2}O\left(\mathrm{og}\right)}}---\left(4\right)$

$\mathrm{\ϵ}=\frac{{\mathrm{MR}}_{o/i}-{\mathrm{MR}}_{\mathrm{og}/i}}{{\mathrm{MR}}_{o/i}}---\left(5\right)$

Wherein, Y_RIt it is the amount mark of the material of oxygen in air；Y_ogIt it is the amount mark of the material of oxygen in tail gas；MV_R, MV_ogIt is the dividing potential drop of oxygen in inlet gas and tail gas respectively；MV_o/i, MV_og/iIt is respectively the ratio of the amount mark of the material of oxygen and noble gas (containing nitrogen, argon etc.) in inlet gas and tail gas；It is the amount mark of the material of steam in inlet gas and tail gas respectively； It is respectively the amount mark of the material of carbon dioxide in inlet gas and tail gas.

Measure steam, the gas content of carbon dioxide and oxygen in inlet gas and tail gas respectively, the coefficient of oxygen utilization under actual process state can be calculated according to formula (1)-(5).

The device analyzing mensuration coefficient of oxygen utilization by tail gas that the present invention proposes, based on it is assumed hereinafter that condition completes:

(1) noble gas such as nitrogen, argon is rear unchanged before measuring, i.e. the nitration denitrification process of nitrogen is negligible in system；

(2) when measuring, the air inflow of Aeration tank is unchanged；

(3) when measuring, the air pressure of the aerating system of Aeration tank is unchanged.

This device uses air bag to complete the collection to tail gas, this air bag retractable, occurs freely to change according to the size bag volume of collected tolerance, under ensureing that in air bag, gas is in ambient pressure, thus consistent with inlet gas.

The gas that air bag is collected is joined directly together with exhaust analyzer, because the instruments such as oxygen sensor, effusion meter, pressure transducer are real-time measurement equipment, still can obtain the real time data of exhaust gas component, so that the comprehensive oxygenation capacity of aerator obtains real-time in-line testing.Certainly, air enter the real-time observed data such as the flow before blower fan and in exhaust analyzer, temperature, pressure should record in the lump, and these data should keep consistent.

Embodiment of above is merely to illustrate the present invention; and not limitation of the present invention; those of ordinary skill about technical field; without departing from the spirit and scope of the present invention; can also make a variety of changes and modification; the technical scheme of the most all equivalents falls within scope of the invention, and the scope of patent protection of the present invention should be defined by the claims.

Claims (4)

1. a device for measuring comprehensive oxygentransfer performance of aerator in technical state, including:

Inlet gas analyser, before being arranged at blower fan, for measure the flow of inlet gas, temperature, humidity, O₂ With CO₂ Content；

Tail gas collecting device, is arranged at above Aeration tank, and described tail gas collecting device can freedom retractable；

Exhaust analyzer, is connected with described tail gas collecting device, is arranged at outside Aeration tank, for measure the flow of tail gas, temperature, CO₂ With O₂ Content；

Described inlet gas analyser includes spinner flowmeter, pressure transducer, temperature sensor, oxygen sensor, carbon dioxide infrared spectrum analyser and asepwirator pump.

2. device for measuring comprehensive oxygentransfer performance of aerator in technical state as claimed in claim 1, it is characterized in that, described tail gas collecting device is air bag, air bag bottom is high density rubber spacer, and it is furnished with metal heavy burden, playing and keep lower submerged effect in water, entirety to be supported by retractable stainless steel frame while suspending, top sets a collection QI KOU.

3. device for measuring comprehensive oxygentransfer performance of aerator in technical state as claimed in claim 1, it is characterized in that, described exhaust analyzer includes gas collector and two parts of gas analysis system, and gas collector includes electromagnetic pressure gauge, vacuum source, spinner flowmeter and regulation valve；Gas analysis system includes being dried post, oxygen sensor, effusion meter and the purging post of control valve, temperature sensor, carbon dioxide infrared spectrum analyser, carbon dioxide and steam and data analyzer and display floater.

4. device for measuring comprehensive oxygentransfer performance of aerator in technical state as claimed in claim 2, it is characterised in that described collection QI KOU is connected with gas collector.