CN103969304B - The residual oxygen content on-line monitoring system of acid regeneration roaster - Google Patents
The residual oxygen content on-line monitoring system of acid regeneration roaster Download PDFInfo
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Abstract
The present invention relates to the residual oxygen content on-line monitoring system of a kind of acid regeneration roaster, comprise measuring system, signal condition and data handling system and terminal processing system, described measuring system is made up of the condensation process device connecting by gas piping, measuring chamber I, disacidify device, lambda sensor, measuring chamber II and aspiration pump; Described signal condition is made up of the filter and amplification unit being connected successively, signal input unit, single-chip microcomputer and DA converter with data handling system; Described terminal processing system is made up of PLC and host computer; Multiple signals are after conditioning processing by single-chip microcomputer, and data enter host computer by PLC and implement the terminal processes that online oxygen concentration is monitored. Compared with prior art; the invention has the beneficial effects as follows: under high temperature corrosion gaseous environment, oxygen content is measured; Circuits System is directly connected with gas sampling and sensing unit; shorten the reaction time of system, realized protection and the environmental requirement to measuring cell by acid-base neutralization filter.
Description
Technical field
The present invention relates to oxygen content monitoring technical field in industrial production, relate in particular to the residual oxygen content on-line monitoring system of a kind of acid regeneration roaster.
Background technology
Metallurgy industry adopts in the production process of spray roasting regeneration hydrochloric acid, the nucleus equipment of acid regeneration unit is roaster, gas-firing and air in stove, the burnt gas main component of generation is HCL (gas), N2, H2O (gas), CO2 etc.
Roaster burner room temperature is between 1000～1200 DEG C, and burning gases are made up of combustion gas and combustion air, and the proportioning of combustion gas and combustion air is called as air-fuel ratio, easily sets off an explosion if air-fuel ratio proportioning is improper. Therefore, the oxygen content in roaster burnt gas being carried out to on-line monitoring is the necessary means that ensures that acid regeneration unit safety is produced.
In roaster, in burnt gas, the feature of measure of oxygen content environment is: (1) tested gas is the corrosive gas of high temperature, high-temperature resistant anti-corrosive to measurement mechanism is had relatively high expectations, roaster top Outlet Gas Temperature is between 380～400 DEG C, and HCL gas has severe corrosive; (2) owing to being gas heating in stove, therefore Electrical Safety is had relatively high expectations; (3) for ensureing the product quality of spent acid and the safe combustion of the interior combustion gas of stove, in burnt gas, oxygen content need to be monitored at any time.
Present stage acid regeneration unit oxygen content measuring method, mainly contain artificial experience proportioning mensuration, semiconductor laser gas analysis to measure method, oxygen content mensuration based on oxygen sensor. Artificial experience proportioning mensuration is difficult to accurately to control combustion gas and air and fully burns, if air coefficient is excessive, roaster interior reaction temperature is inadequate, and spent acid can not be completely oxidized decomposition, and the brown iron oxide of generation is off quality; Air coefficient is too small, causes incomplete combustion, wastes energy and easily produces gas explosion. The not corrosion-resistant and high-temperature furnace gas in the mechanical connection position of semiconductor laser measuring method, and need sample introduction gas to process early stage, with high costs; Zirconia sensor is not corrosion-resistant, and its operating temperature is higher than 600 DEG C, and heat air is known from experience the normal operation to unit and brought potential safety hazard. To the oxygen content in roaster burnt gas carry out on-line monitoring not only to accomplish in time, accurately, reliable, also need to consider safety and Environmental Factors simultaneously.
Summary of the invention
The invention provides the residual oxygen content on-line monitoring system of a kind of acid regeneration roaster; can meet under high temperature corrosion gaseous environment to oxygen content carry out accurately, the requirement of stably measured; the Circuits System that realizes signal testing function is directly connected and is detected with gas sampling and sensing unit; shorten the reaction time of system, realized protection and the environmental requirement to measuring cell by acid-base neutralization filter.
In order to achieve the above object, the present invention realizes by the following technical solutions:
The residual oxygen content on-line monitoring system of acid regeneration roaster, comprise measuring system, signal condition and data handling system and terminal processing system, described measuring system is made up of the condensation process device connecting by gas piping, measuring chamber I, disacidify device, lambda sensor, measuring chamber II and aspiration pump; Signal condition is made up of the filter and amplification unit being connected successively, signal input unit, single-chip microcomputer and DA converter with data handling system; Terminal processing system is made up of the PLC being connected and host computer; Described signal condition and data handling system are carried out the multiple signals that gather in measuring system the signal conditions such as filter and amplification, enter single-chip microcomputer through interface module and carry out data processing, data after treatment are connected with PLC through interface module, and enter the corresponding monitored variable district of host computer by PLC, implement the terminal processes of online oxygen concentration monitoring.
Described lambda sensor is the AO2 type lambda sensor of Citytech company, response time < 5S.
Described filter and amplification unit is made up of LM358 amplifier and INA128PA amplifier, adopt 12V Power supply, pressure signal, flow signal, temperature signal that LM358 amplifier is responsible for sample gas carry out 2 amplifications, and INA128PA amplifier is responsible for oxygen sensor signal to carry out filter and amplification.
Described signal input unit is TLC2543, single-chip microcomputer is the STC89C58-RD model single-chip microcomputer of macrocrystalline science and technology, single-chip microcomputer is provided with OCMJ12232C Chinese fonts lcd module as display device, the D/A converter that the DAC interface module between single-chip microcomputer and PLC is TLV5616.
Described host computer is at least 2, is responsible for respectively monitoring and operation, adopts Siemens WINCC configuration software to carry out configuration, and host computer is by Siemens CP series address card and Siemens PLC CS7 communication; PLC passes through the control of electrothermal relay, breaker, contactor to realize the control to on-the-spot motor, instrumentation, and transmits in real time and carry out the instruction that host computer sends.
In described measuring chamber I and measuring chamber II, be respectively equipped with pressure transmitter, temperature transmitter and flow transmitter, its output signal and lambda sensor output signal all access filter and amplification unit.
450 DEG C of described measuring chamber I internal pressure transmitter heatproofs, 250 DEG C of flow transmitter heatproofs, 500 DEG C of temperature transmitter heatproofs, three transmitter materials are metal tantalum; 200 DEG C of measuring chamber II internal pressure transmitter heatproofs, 200 DEG C of flow transmitter heatproofs, 500 DEG C of temperature transmitter heatproofs, three transmitter materials are stainless steel.
Described condensation process device is made up of 5-6m condenser pipe, Outlet Gas Temperature 150-200 DEG C.
Described disacidify device is made up of alkaline pond and drying bottle, connects by wireway.
Described gas piping the initial segment is communicated with the gas sample mouth on roaster gas outlet conduit, sample tap nominal diameter < 25mm, and opening direction is upward.
Compared with prior art, the invention has the beneficial effects as follows:
1) monitoring system designing on the AO2 type lambda sensor basis based on Citytech company, can meet the requirement to measure of oxygen content under the environment that the interior burnt gas of roaster is high temperature corrosion gas;
2) the present invention is directly connected testing circuit with gas sampling and sensing unit, and total reaction time is short, can monitor rapidly and accurately oxygen content;
3) by add the method for cooling and disacidify filter on gas piping, the impact of lowering the temperature and removing HCL gas to sample gas, the service life of prolongation lambda sensor;
4) by the precision and stability of the method guarantee oxygen content signal measurements such as signal amplification, filtering, A/D and D/A conversion; Evenly mixed oxygen content monitoring system is demarcated by nitrogen carrier of oxygen, obtain oxygen content monitoring system in the time that range is 0～20%, precision is ± 0.44%. For the roaster burnt gas monitoring of 2% oxygen content, in other gases, mushing error is 6.07% relatively;
5) monitoring result shows at the WINCC of host computer configuration software respectively on the LCD MODULE of monitoring cabinet single-chip microcomputer and by PLC, on-the-spot and long-rangely all can show and control, and by the data processing function of host computer, realized to oxygen content carry out on-line monitoring, the function of demarcate, transfinite alarm and data storage;
6) signal condition and data handling system have been increased to intrinsically safe circuit design, utilized the working method of low-voltage and low current to realize explosion prevention function, made maximum voltage < 12V, running current < 70mA, maximum short circuit < 0.5A;
7) according to the gas circuit of equation for ideal gases formula design sample gas, by alkaline pond and drying bottle, sample gas is filtered and is dried, ensure that the sample gas being finally discharged in atmosphere reaches discharging standards, free from environmental pollution.
Brief description of the drawings
Fig. 1 is composition structured flowchart of the present invention.
Fig. 2 is the process of gas path figure of sample gas.
Fig. 3 is signal condition and data handling system structured flowchart.
Fig. 4 is power circuit diagram.
Fig. 5 is the filter amplification circuit of temperature transmitter T1 signal.
Fig. 6 is the filter amplification circuit of oxygen sensor signal.
Fig. 7 is TLC2543 signal input unit pinouts.
Fig. 8 is STC89C58 single-chip microcomputer pinouts.
Fig. 9 is TLV5616CPDA converter and single-chip microcomputer, terminal processing system interface circuit figure.
Figure 10 is OCMJ12232C-3 LCD MODULE pinouts.
Figure 11 is program flow diagram of the present invention.
Figure 12 is terminal data display routine flow chart.
In figure: 1. measuring system 2. signal conditions and the data handling system 3. terminal processing system 4. sample tap 5. high-temperature ball valve 6. condensation process device 7. alkaline pond of measuring chamber I 8. 9. drying bottle 10. measuring chamber II 11. aspiration pumps
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further:
See Fig. 1, it is composition structural representation of the present invention, the residual oxygen content on-line monitoring system of acid regeneration roaster of the present invention, comprise measuring system 1, signal condition and data handling system 2 and terminal processing system 3, described measuring system 1 is made up of the condensation process device 6 connecting by gas piping, measuring chamber I7, disacidify device, lambda sensor, measuring chamber II10 and aspiration pump 11; Signal condition is made up of the filter and amplification unit being connected successively, signal input unit, single-chip microcomputer and DA converter with data handling system 2; Terminal processing system is made up of PLC and host computer; Described signal condition and data handling system are carried out the multiple signals that gather in measuring system the signal conditions such as filter and amplification, enter single-chip microcomputer through interface module and carry out data processing, data after treatment are connected with PLC through interface module, and enter the corresponding monitored variable district of host computer by PLC, implement the terminal processes of online oxygen concentration monitoring.
Described lambda sensor is the AO2 type lambda sensor of Citytech company, response time < 5S.
Described filter and amplification unit is made up of LM358 amplifier and INA128PA amplifier, adopt 12V Power supply, pressure signal, flow signal, temperature signal that LM358 amplifier is responsible for sample gas carry out 2 amplifications, and INA128PA amplifier is responsible for oxygen sensor signal to carry out filter and amplification.
Described signal input unit is TLC2543, single-chip microcomputer is the STC89C58-RD model single-chip microcomputer of macrocrystalline science and technology, single-chip microcomputer is provided with OCMJ12232C Chinese fonts lcd module as display device, the D/A converter that the DAC interface module between single-chip microcomputer and PLC is TLV5616.
Described host computer is at least 2, is responsible for respectively monitoring and operation, adopts Siemens WINCC configuration software to carry out configuration, and host computer is by Siemens CP series address card and Siemens PLC CS7 communication; PLC passes through the control of electrothermal relay, breaker, contactor to realize the control to on-the-spot motor, instrumentation, and transmits in real time and carry out the instruction that host computer sends.
In described measuring chamber I 7 and measuring chamber II 10, be respectively equipped with pressure transmitter, temperature transmitter and flow transmitter, its output signal and lambda sensor output signal all access filter and amplification unit.
450 DEG C of described measuring chamber I 7 internal pressure transmitter heatproofs, 250 DEG C of flow transmitter heatproofs, 500 DEG C of temperature transmitter heatproofs, three transmitter materials are metal tantalum; 200 DEG C of measuring chamber II 10 internal pressure transmitter heatproofs, 200 DEG C of flow transmitter heatproofs, 500 DEG C of temperature transmitter heatproofs, three transmitter materials are stainless steel.
Described condensation process device 6 is made up of 5-6m condenser pipe, Outlet Gas Temperature 150-200 DEG C.
Described disacidify device is made up of alkaline pond 8 and drying bottle 9, connects by wireway.
Described gas piping the initial segment is communicated with the gas sample mouth 4 on roaster gas outlet conduit, sample tap 4 nominal diameter < 25mm, and opening direction is upward.
Galvanic cell type lambda sensor technical maturity, price economy, be applicable to the on-line monitoring to oxygen content under normal temperature, the residual oxygen content on-line monitoring system of acid regeneration roaster of the present invention is selected galvanic cell lambda sensor measuring method, adopt the AO2 type lambda sensor of Citytech company, its operation principle is to be dissolved in the thin electrolyte between barrier film and negative electrode after oxygen sees through barrier film, in the time that oxygen reaches cathode surface, be reduced, its electrode reaction is: O2+2H2O+4e→4OH-，O2+4H+4e→2H2, on lead anode, there is oxidation reaction: 2Pb+2H simultaneously in O2O+4e→2PbO+4H+. Owing to producing gas in roaster by HCL, H2O、N2、CO2、O2Mix Deng gas, oxygen content impact need to be considered the cross-sensitivity of mist, and its data are as shown in the table:
N2、H2、CO2The impact of oxygen content being measured Deng gas
The reaction time that in roaster, in burnt gas, oxygen content monitoring system changes gas should only not regarded the detection time of lambda sensor itself as, but from the tested measuring point oxygen content temporal summation that data are finally read that changes, in native system, be exactly the temporal summation of air-channel system, sensor and the Circuits System of process, total reaction time is: T=TG+TS+TE, wherein:
TGIt is the time of tested gas from the sensor of sampling, condense to, mainly determined to the gas flow in structure and the air-channel system of the distance of sensor, air-channel system itself by sampled point, adopt the shortest gas circuit length, suitable increasing gas flow to improve the reaction time.
TSThe response time of sensor, the response time < 5s of AO2 lambda sensor;
TEThe time that signal detection arrives last demonstration, TEMainly determined by the frequency of Circuits System work and the degree of multi-data processing complexity, wherein the crystal oscillator frequency of Circuits System is more than several ten thousand Hz, so TEAt the millisecond order of magnitude.
In order to detect fast oxygen content, the present invention is directly connected observation circuit with gas sampling and sensing unit, see Fig. 2, the process of gas path figure of sample gas, measuring system 1 is made up of the condensation process device 6 connecting by gas piping, measuring chamber I7, disacidify device, lambda sensor, measuring chamber II10 and aspiration pump 11, set 400 DEG C of sample gas temperature, containing HCL gas content approximately 8.5%, consider AO2 type lambda sensor non-refractory, must first lower the temperature to gas through the condenser pipe of 5 meters of left and right, temperature drops to approximately 150 DEG C of left and right; Reduce through condensation process temperature, in sample gas, part HCL condensation of gas becomes hydrochloric acid liquid, and the not acidproof gas corrosion of oxygen sensor probe, after must filtering out HCL gas, just can measure, the present invention adopts the method for sodium hydroxide solution acid-base neutralization to filter sour gas, sample gas is carried out acid-base neutralization in alkaline pond 8, the HCL gas in filtering gas, then by drying bottle 9 dry gas.
If the gas flow Q recording before lambda sensor1, its gaseous state parameter is respectively pressure P1And temperature T1. Being converted to lambda sensor gas flow is afterwards Q1', its gaseous state parameter is respectively pressure P2And temperature T2, according to The Ideal-Gas Equation (claiming again perfect gas law or C1apeyron equation):
The sour gas total amount that alkalescence pond 8 absorbs is Q1' and lambda sensor after the gas flow Q that records2Poor, i.e. Q1′-Q2。
If the oxygen content that lambda sensor detects is Vdetect, the oxygen content V in former roasterrealComputing formula be:
Therefore the parameter that sample gas need to be measured has the gas flow Q before lambda sensor1, pressure P1, temperature T1, oxygen content, the gas flow after lambda sensor is Q2, pressure P2, temperature T2. Wherein Q1, pressure P1, temperature T1In measuring chamber I 7, gather by pressure transmitter I, temperature transmitter I and flow transmitter I, Q2, pressure P 2, temperature T 2 gather by pressure transmitter II, temperature transmitter II and flow transmitter II in measuring chamber II 10, sample gas is finally discharged into atmosphere by an aspiration pump 11, now gas, not containing acid, reaches discharging standards.
See Fig. 3, be signal condition and data handling system 2 structured flowcharts in the residual oxygen content on-line monitoring system of acid regeneration roaster of the present invention, described signal condition is made up of the filter and amplification unit being connected successively, signal input unit, single-chip microcomputer and DA converter with data handling system 2. The basic function of signal condition and data handling system 2 is: select PS7W12D12S output 12V to filter amplifier LM358 and INA128PA power supply, select PS10W5S output 5V to power to single-chip microcomputer; 6 tunnel sample gas select LM358 filter amplifier to amplify, and oxygen sensor signal carries out hundred times of amplifications by INA128PA filter amplifier; Signal input unit TLC2543 carries out AD conversion to 7 tunnel sampled signals, by STC89C58 chip microcontroller data calculate, the function such as the serial ports transmission of data; The D/A converter of TLV5616 converts the oxygen content monitor signal of single-chip microcomputer output to the analog signal of 0～5V, the D/A converter of TLV5616 is exported single-chip microcomputer data transaction and becomes the analog signal of 0～5V, and the current signal that then signal converts 4～20mA to by voltage/current signals isolated amplifier ISOEM again enters PLC.
Fig. 4 is the power circuit diagram of the residual oxygen content on-line monitoring system of acid regeneration roaster of the present invention. Supply voltage is introduced signal condition and data handling system by shielded cable, can cut-off electricity by the sky in switch board, 220V voltage is exported 12V to filter amplifier LM358 and INA128PA power supply by PS7W12D12S, exports 5V power to single-chip microcomputer by PS10W5S. In figure, terminal AC1, AC2 place input AC220V power supply; FU1, FU2 are fuses, prevent the excessive power module that burns out of electric current; YM1, YM2 are piezo-resistances, prevent the excessive power module that burns out of voltage; PS1, PS2 selects technical grade power transfer module, output+12v respectively ,-12v and 5v voltage provide supply voltage for operational amplifier and single-chip microcomputer.
Signal conditioning circuit is explanation as an example of the filter amplification circuit of temperature transmitter T1 signal example, (seeing Fig. 5). In figure, LM358 is dual operational amplifier, and in filter amplifier circuit, first LM358, as voltage follow use, plays the effect of LPF, isolation signals; Second LM358 uses as filter and amplification. The about 45nA of bias current of LM358, in the time that defeated people's impedance is lOk Ω, output offset voltage is lOk Ω x45nA=0.45mV.
Because AD input voltage is 0-12V, sensor signal 4～20Ma, XR222=20mA, X250 ohm=12V, 12V/12V=1, gain selection is 1 times, frequency characteristic f-
3DB >=500kHz, defeated people's impedance l0k Ω, because AD converter TLC2543 is 12 bit pads, its value is for 0-4095,5V/4095=1.2mV, therefore determines that input offset voltage is 1mV, like this, AD transformed error can not exceed 1 in theory.
Seeing Fig. 6, is the filter amplification circuit of oxygen sensor signal of the present invention. The output of AO2 oxygen concentration sensor signal is output as 9～13mV while being 25% oxygen content, is output as 5mV left and right when 10% oxygen content. The signal output that single chip computer measurement needs is V magnitude voltage signals, and therefore the multiplication factor of filter amplifier will be set as 100, and the filter amplifier that the present invention selects is INA128PA.
Temperature signal (2 tunnel), pressure signal (2 tunnel), flow signal (2 tunnel) and the oxygen concentration sensor signal of sample gas totally 7 road signals enters signal input unit TLC2543 and carries out AD conversion after filter amplifier, it is 12 Bits Serial analog-digital converters, use switching capacity successively approximation technique completes A/D conversion, and serial input structure can be saved the I/O resource of single-chip microcomputer; And moderate, resolution ratio is higher.
Seeing Fig. 7, is signal input unit TLC2543 signal input unit pinouts, in figure:
A0～A6, pin is 1～7, analog input end is flow signal (2 tunnel), pressure signal (2 tunnel), temperature signal (2 tunnel) and the oxygen concentration sensor signal of sample gas.
EOC, pin is 19, EOC end. After last I/OCLOCK trailing edge, EOC from high level become low level and remain to convert with data prepare transmission till. EOC pin is the trailing edge at the 12nd clock by high step-down, and it indicates that TLC2543 starts the analog quantity of this sampling to carry out A/D conversion, converts rear EOC and uprises, mark EOC.
DATA
OUT, pin is the tri-state serial output terminal of 16, A/D transformation result. When high in high impedance status, when low in state of activation.
ADDRE
SS, pin is 17, serial data input. The output data length after the analog input channel that will change, conversion, the form of output data are specified by 8 bit data.
I/OCLOCK, pin is 18, I/O clock end, the clock of control inputs output, is inputted by outside.
CS, pin is 15, sheet choosing end. In the time that CS holds by high step-down, internal counter resets; During by low uprising, in setting-up time, forbid DATAOUT and I/OCLOCK.
7 circuit-switched data signals enter single-chip microcomputer and carry out accurate Calculation after Collect conversion, and carry out serial output according to certain frequency, and the present invention selects the STC89C58-RD model single-chip microcomputer of macrocrystalline science and technology. Seeing Fig. 8, is STC89C58 single-chip microcomputer pinouts, and 40 pins of single-chip microcomputer are broadly divided into 4 classes: power supply, clock, control and I/O pin. Because advance signal has 7 road signal demand processing, and transtation mission circuit requirement is low in energy consumption, frequency is accurate, and system clock frequency is had relatively high expectations, and therefore, adopts the clock source of sheet internal oscillator for CPU, and the clock frequency that crystal oscillator produces is 11.0592MHz. Be respectively the input/output terminal of inverting amplifier in single-stage sheet at the X1 of single-chip microcomputer and X2 two pins, its frequency is 11.0592MHz. Between single-chip microcomputer X1 and X2 two pins, connect a crystal oscillator, and connect ground connection after two little electric capacity. The mode of single-chip data communication has two kinds of parallel communications and serial communications, and native system selects the serial ports carrying by single-chip microcomputer to carry out the communication of RS-232 mode. The connector matching with RS-232 is chosen as DB-9, and 9 signals of asynchronous communication are only provided. Use P3.0 (10 pin RXD) and P3.1 (11 pin TXD) to be connected respectively to TxD (3 pin) and the RxD (2 pin) of DB-9 connector, the ground wire (5 pin) of DB-9 connector requires ground connection.
Corresponding energy-conservation and programming Control dormancy control bit that the present invention makes full use of in the inner specified register PCON of STC89C58 single-chip microcomputer completes energy-conservation and control sleep mode, and by the IDL position set of PCON register, single-chip microcomputer enters standby mode; By the PD position set of PCON register, single-chip microcomputer enters power down protection mode.
After 7 road signals calculate in single-chip microcomputer, export with digital data form, because PLC input signal is the current signal of 4～20mA, therefore need data-signal first to convert the analog signal of 0～5V to by the D/A converter of TLV5616, the current signal that then signal converts 4～20mA to by voltage/current signals isolated amplifier ISOEM after by LM358 filter and amplification again enters PLC.
Seeing Fig. 9, is TLV5616CPDA converter and single-chip microcomputer, terminal processing system interface circuit figure. Main pin explanation:
DIN, pin is 1, serial digital data input. Be connected with single-chip microcomputer P2.4 (pin is 25). This pin must with CS enable be set to low. Then, FS trailing edge starts transferring data position, when every bit (with MSB) beginning is converted through 16 about the trailing edge of SCLK internal register or FS rises, the content of shift register is moved to the renewal Voltage-output of DAC latch to new level.
SCLK, pin is 2, serial digital input end of clock. Be connected with single-chip microcomputer P2.5 (pin is 26). Largest serial clock frequency is 20MHz.
CS, pin is 3, chip selection end. Be connected with single-chip microcomputer P2.6 (pin is 27). Numeral input is used for enabling and forbidding input, Low level effective.
FS, pin is 4, frame synchronization. Be connected with single-chip microcomputer P2.7 (pin is 28). Numeral input 4 line serial line interfaces.
REFIN, pin is 6, with reference to analog input voltage.
OUT, pin is 7, DAC analog input end. After signal output, be connected with LM358 filter amplifier.
The scene of oxygen content monitoring system in inflammable and explosive natural gas monitoring, although whole acid regeneration unit is negative pressure operation, natural gas can not enter scene, if but the situations such as pipe leakage occur, monitor signal conditioning will form dangerous explosive source with treatment circuit, therefore must carry out Explosion-proof Design with treatment circuit to monitor signal conditioning. The present invention produces the energy of electric spark and fuel factor from restriction, and the electric current in circuit and voltage are strictly limited in an allowed band, ensures that circuit avoids the hazardous gas blast that may exist in normal work or short circuit or the situation such as components and parts are impaired.
Described in the residual oxygen content on-line monitoring system of acid regeneration roaster of the present invention in signal condition and treatment circuit, maximum voltage < 12V, running current < 70mA, maximum short circuit current can be controlled at below 0.5A by current-limiting resistance, the capacitance sum of capacity cell is less than 32 μ F, inductance element sum is less than 1 μ H, all lights curve lower than ball bearing made using. For hydrogen environment, circuit power must be limited in to 1.3W left and right in addition, in signal condition of the present invention and data processing circuit, (in 1 second) energy output: E1=12V × 0.07A=0.84W=0.84J/s in the short time; In PLC, use isolated amplifier ISOEM that signal is converted to the explosion-proof signal of 4～20mA security industry, S7-300/400PLC working power+24V of Siemens, PLC measures output energy: E2=24V × 0.02A=0.48W=0.48J/s in the monitor signal short time, meets the designing requirement of intrinsically safe circuit.
The terminal processing system 3 of the residual oxygen content on-line monitoring system of acid regeneration roaster of the present invention is made up of PLC and host computer, is responsible for reception, processing and the demonstration of signal. For handled easily personnel can directly read the data of oxygen content at the scene, data can show and show at Siemens Company's WINCC configuration software of host computer by PLC simultaneously on the LCD MODULE of single-chip microcomputer, and the present invention adopts OCMJ12232C Chinese fonts lcd module as the machine display device.
Seeing Figure 10, is OCMJ12232C-3 LCD MODULE pinouts, wherein:
RS (CS), pin 4, direction is input, while selecting high level, as data, while selecting low level, as instruction code, this pin is connected with 39 pin P0.0 of single-chip microcomputer, selects position to use as input register;
R/W (STD), pin 5, direction is input, and input read/write is selected signal, and this pin is connected with 38 pin P0.1 of single-chip microcomputer;
E (SCLK), pin 6, direction is input, input enable signal, high level is effective, and this pin is connected with 37 pin P0.2 of single-chip microcomputer;
RST, pin 16, direction is input, reset signal, this pin is connected with 34 pin P0.5 of single-chip microcomputer;
D0～D7, pin 7～14, data 0～data 7, this pin is connected with 1～8 pin P1.0～P1.7 pin of single-chip microcomputer, is that single-chip microcomputer is used for transmitting order and data to liquid crystal;
LEDK, pin 17, LED-OV (OV), this pin is connected with 33 pin P0.6 of single-chip microcomputer, when BKON is high level, triode N501 conducting, LED101 obtains electroluminescence, and LCD backlight is bright; When BKON is low level, triode N501 cut-off, LED101 dead electricity is not luminous, and LCD backlight does not work;
The measurement category of oxygen content is that 0～22%, LCD shows data with the form of XX.XX, and unit is %; LCD can also show the data of flow, temperature and pressure. See Figure 11, it is data display program flow chart of the present invention, between single-chip microcomputer and LCD display module, pass through RS-232 serial communication, send read-write sequence instruction by pin P0.0-0.2 and P0.5 to CS, R/W, E and the RST pin of LCD module, complete demonstration and the storage of LCD character, send data-signal by P1.0-P1.7 pin to the D0-D7 pin of LCD module.
The on-the-spot Presentation Function of the residual oxygen content on-line monitoring system of acid regeneration roaster of the present invention, by the programming of single-chip microcomputer is realized, is shown in Figure 12, is terminal data display routine flow chart. AD2543 chip slapper selects clock to set high level, is in order to start AD conversion, because AD conversion needs trailing edge; 2543 effect is sampling flow, pressure, temperature and oxygen content etc.; DA5616 chip slapper choosing input sets high level, is in order to start DA conversion, because DA conversion needs trailing edge; 5616 effect is the final oxygen content for computing is drawn, is converted to magnitude of voltage, sends into the input of voltage current adapter, exports corresponding electric current to PLC; Liquid crystal LCD has an independent reset terminal, controls separately with single-chip microcomputer pin, and the liquid-crystal controller that can reset in due course, prevents and show confusion; Initialize serial mouth, be for can and host computer carry out communication, in native system, without communication, but retained communication function; Main program starts, read in order flow 1 flow 2, pressure 1 pressure 2, temperature 1 temperature 2, the oxygen content of oxygen sensor, carry out computing according to The Ideal-Gas Equation, draw oxygen content value, and be converted to voltage by DA5616, and this voltage service voltage current conversion chip is converted to electric current, offer upper PLC, then program is returned and is read flow 12 etc., can circulate always; Data show and keystroke handling can be seen middle data, are convenient to debugging.
ISOEM-U1-P3-01 module converts the voltage signal of 0～5V of TLV5616DAC to the current signal of 4～20mA, and realize the isolation translation function of industry spot signal, current signal is directly sent on the host computer configuration software in acid regeneration unit computer system and is shown by PLC. The monitoring system general structure of acid regeneration unit place cold rolling mill is: 2 industrial computers are as host computer, a wherein monitoring, an operation, the present invention adopts Siemens WINCC configuration software to carry out configuration, and host computer is by Siemens CP series address card and Siemens PLC CS7 communication. PLC reaches on-the-spot motor, the control of instrumentation the control of electrothermal relay, breaker, contactor etc., and transmits in real time and carry out the instruction that host computer sends. Oxygen content monitoring system shows to be some flue gas oxygen content on host computer configuration monitoring picture, in the time that the scope of flue gas oxygen content exceedes setting value, can report to the police.
[embodiment 1] utilizes the residual oxygen content on-line monitoring system of acid regeneration roaster of the present invention, and in Binzhou, Shandong Boxing County Xin Meida science and technology, Materials Co., Ltd has carried out the continuous monitoring of 96 hours, and measurement point is at outlet conduit place, five layers of roaster top of acid regeneration unit. Field experiment the results are shown in following table:
The on-the-spot oxygen content parameter list of Shandong Xin Meida
[embodiment 2] utilizes the residual oxygen content on-line monitoring system of acid regeneration roaster of the present invention, carried out the continuous monitoring of 72 hours in Tianjin Jiang Lin development in science and technology Co., Ltd, and measurement point is at outlet conduit place, five layers of roaster top of acid regeneration unit. Field experiment the results are shown in following table:
The on-the-spot oxygen content parameter list of river, Tianjin woods
As can be seen from the above data, the oxygen content data area that Shandong Xin Meida records is between 0.9～1.4%, and the oxygen content data area that Tianjin Jiang Lin records is between 1.1～2.0%.
The residual oxygen content on-line monitoring system of acid regeneration roaster of the present invention is evenly mixed and carries out experimental calibration by nitrogen carrier of oxygen, obtain oxygen content monitoring system in the time that range is 0～20%, precision is ± 0.44%. For the roaster burnt gas monitoring of 2% oxygen content, in other gases, mushing error is 6.07% relatively.
Claims (10)
1. the residual oxygen content on-line monitoring system of acid regeneration roaster, is characterized in that, comprise measuring system, signal condition andData handling system and terminal processing system, described measuring system is by the condensation process device, the measurement that connect by gas pipingChamber I, disacidify device, lambda sensor, measuring chamber II and aspiration pump composition; Signal condition and data handling system are by successivelyThe filter and amplification unit, signal input unit, single-chip microcomputer and the DA converter composition that connect; Terminal processing system is by being connectedPLC and host computer composition; Described signal condition and data handling system are filtered the multiple signals that gather in measuring systemThe conditioning of ripple amplifying signal, enters single-chip microcomputer through interface module and carries out data processing, and data after treatment are through interface module and PLCBe connected, and enter the corresponding monitored variable district of host computer by PLC, implement the terminal processes of online oxygen concentration monitoring.
2. the residual oxygen content on-line monitoring system of acid regeneration roaster according to claim 1, is characterized in that, described inLambda sensor is the AO2 type lambda sensor of Citytech company, response time < 5S.
3. the residual oxygen content on-line monitoring system of acid regeneration roaster according to claim 1, is characterized in that, described inFilter and amplification unit is made up of LM358 amplifier and INA128PA amplifier, adopts 12V Power supply, and LM358 amplifiesPressure signal, flow signal, temperature signal that device is responsible for sample gas carry out 2 amplifications, and INA128PA amplifier is negativeDuty is carried out filter and amplification to oxygen sensor signal.
4. the residual oxygen content on-line monitoring system of acid regeneration roaster according to claim 1, is characterized in that, described inSignal input unit is TLC2543, and single-chip microcomputer is the STC89C58-RD model single-chip microcomputer of macrocrystalline science and technology, and single-chip microcomputer is provided withOCMJ12232C Chinese fonts lcd module is as display device, and the DAC interface module between single-chip microcomputer and PLC isThe D/A converter of TLV5616.
5. the residual oxygen content on-line monitoring system of acid regeneration roaster according to claim 1, is characterized in that, described inHost computer is at least 2, is responsible for respectively monitoring and operation, adopts Siemens WINCC configuration software to carry out configuration,Host computer is by Siemens CP series address card and Siemens PLC CS7 communication; PLC by electrothermal relay, breaker,The control of contactor realizes the control to on-the-spot motor, instrumentation, and transmits in real time and carry out the instruction that host computer sends.
6. the residual oxygen content on-line monitoring system of acid regeneration roaster according to claim 1, is characterized in that, described inIn measuring chamber I and measuring chamber II, be respectively equipped with pressure transmitter, temperature transmitter and flow transmitter, its output signal and oxygenSensor output signal all accesses filter and amplification unit.
7. the residual oxygen content on-line monitoring system of acid regeneration roaster according to claim 6, is characterized in that, described in450 DEG C of measuring chamber I internal pressure transmitter heatproofs, 250 DEG C of flow transmitter heatproofs, 500 DEG C of temperature transmitter heatproofs, threeIndividual transmitter material is metal tantalum; 200 DEG C of measuring chamber II internal pressure transmitter heatproofs, 200 DEG C of flow transmitter heatproofs,500 DEG C of temperature transmitter heatproofs, three transmitter materials are stainless steel.
8. the residual oxygen content on-line monitoring system of acid regeneration roaster according to claim 1, is characterized in that, described inCondensation process device is made up of 5-6m condenser pipe, Outlet Gas Temperature 150-200 DEG C.
9. the residual oxygen content on-line monitoring system of acid regeneration roaster according to claim 1, is characterized in that, described inDisacidify device is made up of alkaline pond and drying bottle, connects by wireway.
10. the residual oxygen content on-line monitoring system of acid regeneration roaster according to claim 1, is characterized in that, described inGas piping the initial segment is communicated with the gas sample mouth on roaster gas outlet conduit, and sample tap nominal diameter < 25mm, opensMouth is directed upwardly.
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| CN111913409B (en) * | 2019-05-07 | 2022-03-08 | 上海宝信软件股份有限公司 | Bell-type furnace oxygen content detection device |
| CN112947327B (en) * | 2021-01-28 | 2022-12-13 | 卓然(靖江)设备制造有限公司 | WINCC-based industrial furnace group intelligent monitoring and management system |
| CN115144445A (en) * | 2022-06-21 | 2022-10-04 | 中国核工业二三建设有限公司 | Oxygen content analyzer and analysis method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735799A (en) * | 2012-06-19 | 2012-10-17 | 北京雪迪龙科技股份有限公司 | Engine exhaust monitoring system |
| CN202814943U (en) * | 2012-08-06 | 2013-03-20 | 智谱特环境科技（北京）有限公司 | Device with two oxygen sensors for online monitoring of flue gas humidity |
| CN203929702U (en) * | 2014-05-15 | 2014-11-05 | 鞍山创新废酸除硅再生工程有限公司 | The residual oxygen content on-line monitoring system of acid regeneration calciner |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102814943A (en) * | 2012-08-20 | 2012-12-12 | 南昌大学 | Automatic traceless degating injection mold |
-
2014
- 2014-05-15 CN CN201410206750.4A patent/CN103969304B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735799A (en) * | 2012-06-19 | 2012-10-17 | 北京雪迪龙科技股份有限公司 | Engine exhaust monitoring system |
| CN202814943U (en) * | 2012-08-06 | 2013-03-20 | 智谱特环境科技（北京）有限公司 | Device with two oxygen sensors for online monitoring of flue gas humidity |
| CN203929702U (en) * | 2014-05-15 | 2014-11-05 | 鞍山创新废酸除硅再生工程有限公司 | The residual oxygen content on-line monitoring system of acid regeneration calciner |
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Address after: 114000 6 Yongkang street, Tiexi Economic Development Zone, Anshan, Liaoning. Patentee after: ANSHAN CHUANGXIN ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. Address before: 114000 6 Yongkang street, Tiexi Economic Development Zone, Anshan, Liaoning. Patentee before: ANSHAN CHUANGXIN WASTE ACID DESILICATION REGENERATION ENGINEERING CO.,LTD. |
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Effective date of registration: 20240117 Address after: Room 0310, 3rd Floor, Building 1, Courtyard 3, Longyu North Street, Huilongguan Town, Changping District, Beijing, 100085 Patentee after: Powell Technology (Beijing) Co.,Ltd. Address before: 114000 6 Yongkang street, Tiexi Economic Development Zone, Anshan, Liaoning. Patentee before: ANSHAN CHUANGXIN ENVIRONMENTAL PROTECTION TECHNOLOGY Co.,Ltd. |