CN102506949B - System for automatically monitoring blast volume - Google Patents

System for automatically monitoring blast volume Download PDF

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Publication number
CN102506949B
CN102506949B CN 201110302725 CN201110302725A CN102506949B CN 102506949 B CN102506949 B CN 102506949B CN 201110302725 CN201110302725 CN 201110302725 CN 201110302725 A CN201110302725 A CN 201110302725A CN 102506949 B CN102506949 B CN 102506949B
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CN
China
Prior art keywords
intelligent digital
transmitter
flow instrument
digital flow
blast volume
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Expired - Fee Related
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CN 201110302725
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Chinese (zh)
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CN102506949A (en
Inventor
卫红明
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CHANGZHOU HAOBANG NANO TECHNOLOGY PAINT Co Ltd
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CHANGZHOU HAOBANG NANO TECHNOLOGY PAINT Co Ltd
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Priority to CN 201110302725 priority Critical patent/CN102506949B/en
Publication of CN102506949A publication Critical patent/CN102506949A/en
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Abstract

The invention discloses a system for automatically monitoring blast volume. The system comprises an air blower for generating a volume of blast, a throttling device, a transmitter, a first-level intelligent digital flow instrument and a second-level intelligent digital flow instrument, wherein the throttling device measures the blast volume and is connected with the air blower by an air pipeline; the transmitter converts pressure difference generated by the throttling device into an electrical signal; the transmitter is connected with the throttling device by a guide pipe; the first-level intelligent digital flow instrument is electrically connected with the transmitter; the first-level intelligent digital flow instrument converts a pressure difference signal sent from the transmitter and then carries out calculation to generate the difference force, the flow and the temperature value of the specific blast volume; and the second-level intelligent digital flow instrument is electrically connected with the first-level intelligent digital flow instrument. The system can be used for effectively monitoring blast volume and aeration volume in an aeration tank so as to detect the flow, the pressure and the like of each path of air all the time, which is favorable for improvement of sewage processing quality.

Description

Automatic monitoring system of blast volume
Technical field
The present invention relates to technical field of sewage, be specifically related to the automatic monitoring system of blast volume in a kind of sewage disposal process.
Background technology
Oily sludge mainly results from oil field and refinery, and the oil-field development major part is to adopt early-stage waterflooding to keep the method for reservoir pressure at present.Deep mining along with the oil field, extraction Water in oil rate is more and more higher, thereby in carrying out the dehydration of crude oil, there are a large amount of oily sludges in the bottoms such as water knockout, oil tank, slop oil tank, simultaneously in the oil field, the attached sewage-farm of refinery (at the bottom of such as oil interceptor, flotation cell, aeration tank etc.) also exist a large amount of oily sludges, these mud compositions are complicated, generally formed by oil-in-water (O/W), Water-In-Oil (W/O) and suspended solid, and fully emulsified, viscosity is difficult to more greatly sedimentation, thereby produces great harmfulness in production and environmental protection.In recent years, the processing of oily sludge receives much attention, generally adopt landfill abroad, disperse to execute cultivated, concentrate that drying and incinerating, microbiological treatment, chemosetting are processed, chemical oxidation degraded, chemical solvent clean, although these methods have obtained corresponding effect to the processing of sewage.But, in the processing procedure of sewage, there is very large impact in the factors such as the water-gas ratio in the water, temperature sludge volume, recoil time, aeration pressure to the treatment effect of sewage, and also do not have the complete suitable technology of a cover that the factors such as water-gas ratio, temperature sludge volume, recoil time, aeration pressure are monitored in the existing technology.
Summary of the invention
The purpose of this invention is to provide a kind of automatic monitoring system of blast volume, this system is in sewage disposal process, consist of an aeration tank automatic monitoring system of blast volume, this system can effectively monitor the blow rate required and the aeration rate that enter the aeration tank, thereby the flow of each road air, pressure etc. are detected constantly, be beneficial to the quality that improves wastewater treatment.
The technical scheme that realizes the object of the invention is as follows:
Automatic monitoring system of blast volume comprises the fan blower that produces the blow rate required;
And the restriction device that the blow rate required is measured, this restriction device is connected with fan blower by gas pipe line;
And changing the pressure reduction that restriction device produces the transmitter of electric signal into, this transmitter is connected with restriction device by guiding tube;
And the first order intelligent digital flow instrument that is electrically connected with transmitter, the pressure difference signal process that this first order intelligent digital flow instrument is sent transmitter here is changed and is calculated, and produces poor power, flow and the temperature value of concrete air quantity;
And the second level intelligent digital flow instrument that is electrically connected with first order intelligent digital flow instrument.
Automatic monitoring system of the present invention has the following functions characteristic:
(1) automatic monitoring brake: as long as by panel required function is suitably selected, system just can carry out single channel or multichannel itinerant monitor system automatically, relies on the medium options button, can select eight kinds of measured mediums to measure.
(2) automatic compensation function: some measured medium (such as saturated vapour, superheated vapor etc.), density is along with the variation of pressure and temperature changes.According to the difference of medium, can distinguish the selection pressure compensation, temperature compensation or pressure and temperature be auto-compensation simultaneously.
(3) preparatory function: be provided with a keypad in the system, date of actual measurement, time, canonical parameter etc. can be inserted in the internal storage at any time, use when relatively reaching timed print.
(4) off-limit alarm function: when instantaneous or integrated flux surpassed the bound scope of setting, system can in time provide alerting signal, reminded operating personnel to process.
(5) power-off protection function: be provided with power-off protecting circuit in flow instrument inside, when disconnection fault occurs when, the automatically starting standby power supply, the parameter of having inserted before this and cumulative flow value can not lost.About six months of guard time.
(6) automatic display function: six light-emitting diode displays all are housed on two-stage measuring instrument panel can go the rounds to show pressure reduction, force value, instantaneous delivery and cumulative flow value, indication range from 000000 to 999999 can realize switching fixing or that circulation shows by patrolling and examining button.The function that also has artificial zero clearing and automatic clear.
(7) automatic printing function: miniprinter that system is with is printable to go out the parameters such as differential pressure value, force value, temperature flow value, cumulative flow value, date, time.Printing type can be selected to print at any time or two kinds of timed prints.
(8) automatic control function: the instantaneous delivery value can be gone to control topworks by the 0-10mA direct current signal, thereby replace traditional regulator.
In sum, this system can effectively monitor the blow rate required and the aeration rate that enter the aeration tank, thereby the flow of each road air, pressure etc. is accomplished know what's what, and has greatly improved the quality of wastewater treatment.It all is automatically to carry out that this system is metered into Display and Print from detection, thereby has improved the real-time, reliability, agility of system works, greatly saved manpower and materials.In the serious environmental pollution situation of in the face of the current ubiquity of China, this system is little with its investment, the plurality of advantages such as high, easy for operation of producing effects.
Below in conjunction with the drawings and specific embodiments invention is described further.
Description of drawings
Fig. 1 is the structural representation of automatic monitoring system of the present invention;
Fig. 2 is the circuit block diagram of first order intelligent digital flow instrument;
In the accompanying drawing, 10 is fan blower, and 20 is restriction device, 21 is gas pipe line, 30 is transmitter, and 31 is guiding tube, and 40 is first order intelligent digital flow instrument, 41 is A/D converter, 42 is single-chip microcomputer, and 43 is KYBD/display-interface, and 44 is light-emitting diode display, 50 is second level intelligent digital flow instrument, and 60 is printer.
Embodiment
With reference to Fig. 1 and Fig. 2, automatic monitoring system of blast volume of the present invention, this system is comprised of fan blower 10, restriction device 20, transmitter 30, first order intelligent digital flow instrument 40, second level intelligent digital flow instrument 50 and printer 60, below in conjunction with the aeration tank, respectively the effect of every part and the annexation between the each several part are described in detail:
The blow rate required in the Monitoring and Controlling aeration tank, the dissolved oxygen DO in the capable of regulating aeration tank makes wastewater treatment reach optimum efficiency.The blow rate required of automatic monitoring system of the present invention aeration tank relies on the fan blower 10 of two 55kW to replace air feed, is sent to respectively 4 restriction devices through four pipelines.
Restriction device 20 is for No. four blows rate required that enter the aeration tank are measured, and this restriction device is connected with fan blower by gas pipe line 21.In native system, four groups of throttling orifice plates that can form differential pressure have been selected.When the gas flow that is full of gas pipe line through pipeline and when arriving throttling orifice plate, air flow stream is in throttling orifice plate place local contraction, thereby flow velocity is increased, static pressure reduces, so just produced pressure reduction p before and after throttling orifice plate, poor calculating formula is as follows:
p＝p 1-p 2
P in the formula 1Be the pressure before the throttling orifice plate;
p 2Be the pressure behind the throttling orifice plate;
P is the pressure reduction at throttling orifice plate place of flowing through;
This pressure reduction changes along with uninterrupted, and the flow of flow media is larger, and the pressure reduction that produces before and after throttling orifice plate is also just larger.Thereby, just can weigh the size of fluid flow by measuring pressure reduction, this measuring method is take energy conservation law and mobile continuity law as the basis, and according to Bernoulli equation and mobile continuity equation, the fundamental equation that can derive flow is:
q v = π / 4 · α · ϵ · d 2 2 p / ρ 1 ,
q m = π / 4 · α · ϵ · d 2 2 p / ρ 1 ,
In the formula: q v---the volumetric flow rate of fluid, m 3/ s;
q m---the mass rate of fluid, kg/s;
The opening diameter of d---orifice plate, m;
α---coefficient of flow;
The expansion coefficient of ε---medium;
The pressure reduction of p---restriction device, Pa;
ρ 1---the density under the restriction device upstream side duty, kg/m 3.
Can draw according to aforesaid equation, after fluid and throttling orifice plate were determined, volumetric flow rate, mass rate had certain quantitative relation with the pressure difference of orifice plate front and back.
Transmitter 30 changes the pressure reduction that restriction device 20 produces into electric signal, and this transmitter 30 is connected with restriction device by guiding tube 31.Adopt four electronic differential pressure transmitters of DBC-240 type in the system, be connected to respectively the output terminal of four throttling orifice plates.The pressure reduction P that is produced by throttling orifice plate causes four differential pressure transmitters through two guiding tubes 31 respectively, through the standard current signal of output 0-10mA after the differential pressure transmitter conversion, this current signal is sent into the intelligent digital flow instrument monitor demonstration.
The first order intelligent digital flow instrument 40 that the output terminal of transmitter 30 is electrically connected, the pressure difference signal process that this first order intelligent digital flow instrument is sent transmitter here is changed and is calculated, and produces poor power, flow and the temperature value of concrete air quantity.Have four single first order intelligent digital flow instruments in the automatic monitoring system of the present invention, respectively corresponding four transmitters 30.As shown in Figure 2, this first order intelligent digital flow instrument comprises: the analog signal conversion that transmitter is sent is the A/D converter 41 of digital signal; And the single-chip microcomputer 42 that is electrically connected with A/D converter, this single-chip microcomputer will come from that the electric signal of A/D converter is sampled, scale transformation and calculating.And a KYBD/display-interface 43 that is connected in the microcontroller communication buffer output terminal, the output terminal of this KYBD/display-interface connects a light-emitting diode display 44.
The working method of first order intelligent digital flow instrument is: the pressure reduction that first order intelligent digital flow instrument is at first sent transmitter here (comprises pressure, temperature etc.) signal is through A/D converter 41 transfer standard voltage signals, then sample through single-chip microcomputer, scale transformation, computing formula and medium compensation formula according to instantaneous and integrated flux calculate, pressure difference with the computing gained, force value, temperature value, the instantaneous delivery value, the cumulative flow value is delivered to display buffer and communication buffer district, both instantaneous delivery can be shown by four groups of 6 light-emitting diode displays to the four measuring loop, also integrated flux can be shown.The switching of the two is finished by " instantaneous ", " accumulation " switching push button on the panel.
If do not consider pressure, temperature variation to the impact of medium, when only inputting the differential pressure signal measuring flow, practical flow formula is:
q v = K 2 p ,
q m = K 1 p ,
In the formula: q v---volumetric flow rate, m 3/ h;
q m---mass rate, kg/h;
K 1 - q m max / p max
K 2 - q v max / p max
q Mmax---the design maximum mass flow is worth kg/h most;
p Max---design maximum differential pressure value, MPa;
q Vmax---design maximum volume flow value, m 3/ h;
H---differential pressure, MPa.
The second level intelligent digital flow instrument 50 that first order intelligent digital flow instrument 40 is electrically connected.Described second level intelligent digital flow instrument is the intelligent digital flow instrument of DJZ-05 type.Second level intelligent digital flow instrument is used for itinerant monitor system, the instantaneous delivery value of demonstration four tunnel and their accumulated value.By patrolling and examining and locking press button on the panel, both can carry out itinerant monitor system and show, may be locked in again certain on the way.
This monitoring system also comprises a printer 60, and this printer 60 is electrically connected on the output terminal of second level intelligent digital flow instrument.Utilize print button on intelligent digital flow instrument 50 panels of the second level to print at any time and patrol and examine the result, in time grasp monitoring result so that operating personnel to be provided.

Claims (5)

1. automatic monitoring system of blast volume is characterized in that, comprises the fan blower that produces the blow rate required;
And the restriction device that the blow rate required is measured, this restriction device is connected with fan blower by gas pipe line;
And change the pressure reduction that restriction device produces the transmitter of electric signal into, and this transmitter is connected with restriction device by guiding tube, and described restriction device is throttling orifice plate;
And the first order intelligent digital flow instrument that is electrically connected with transmitter, the pressure difference signal process that this first order intelligent digital flow instrument is sent transmitter here is changed and is calculated, and produces poor power, flow and the temperature value of concrete air quantity;
And the second level intelligent digital flow instrument that is electrically connected with first order intelligent digital flow instrument, described first order intelligent digital flow instrument comprises: the analog signal conversion that transmitter is sent is the A/D converter of digital signal; And the single-chip microcomputer that is electrically connected with A/D converter, this single-chip microcomputer will come from that the electric signal of A/D converter is sampled, scale transformation and calculating.
2. automatic monitoring system of blast volume according to claim 1, it is characterized in that: described transmitter is the electronic differential pressure transmitter of DBC-240 type.
3. automatic monitoring system of blast volume according to claim 1, it is characterized in that: described first order intelligent digital flow instrument also comprises a KYBD/display-interface that is connected in the microcontroller communication buffer output terminal, and the output terminal of this KYBD/display-interface connects a light-emitting diode display.
4. automatic monitoring system of blast volume according to claim 1, it is characterized in that: described second level intelligent digital flow instrument is the intelligent digital flow instrument of DJZ-05 type.
5. according to claim 1 to the described automatic monitoring system of blast volume of 4 any one, it is characterized in that: this monitoring system also comprises a printer, and this printer is electrically connected on the output terminal of second level intelligent digital flow instrument.
CN 201110302725 2011-09-29 2011-09-29 System for automatically monitoring blast volume Expired - Fee Related CN102506949B (en)

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Publication number Priority date Publication date Assignee Title
CN105136381A (en) * 2015-08-24 2015-12-09 洛阳三隆安装检修有限公司 Reverse-blowing detection system
CN105783488A (en) * 2016-04-20 2016-07-20 四川蓉幸实业有限公司 Stable-performance drying intelligent system for fritillaria medicinal materials
CN105783487A (en) * 2016-04-20 2016-07-20 四川蓉幸实业有限公司 Closed drying and energy saving system for fritillaria medicines

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CN100557404C (en) * 2006-07-19 2009-11-04 上海理工大学 The draught fan performance test device that the inlet and outlet of air compartment formula are general
CN101149312B (en) * 2007-10-30 2010-09-08 南京理工大学 Heat exchanger performance test system for sealing cabinet heat radiation
CN101303367B (en) * 2008-07-09 2011-02-16 上海理工大学 Standard flow type micro wind speed calibration apparatus and calibration method thereof
CN201402219Y (en) * 2009-04-03 2010-02-10 长沙学院 Unit heater performance test device for electrical fireplace
CN102175714A (en) * 2010-12-23 2011-09-07 烟台富耐克散热器有限公司 Heat radiator and fan performance testing system
CN202255482U (en) * 2011-09-29 2012-05-30 常州豪邦纳米科技涂料有限公司 Automatic monitoring system of blast volume

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