CN106370508A - Chemical oxygen demand (COD) digestion instrument - Google Patents
Chemical oxygen demand (COD) digestion instrument Download PDFInfo
- Publication number
- CN106370508A CN106370508A CN201610860669.7A CN201610860669A CN106370508A CN 106370508 A CN106370508 A CN 106370508A CN 201610860669 A CN201610860669 A CN 201610860669A CN 106370508 A CN106370508 A CN 106370508A
- Authority
- CN
- China
- Prior art keywords
- circuit
- feet
- chip
- unit
- heat conduction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/44—Sample treatment involving radiation, e.g. heat
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/023—Industrial applications
- H05B1/0247—For chemical processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- General Induction Heating (AREA)
- Control Of Resistance Heating (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The invention relates to a chemical oxygen demand (COD) digestion instrument, comprising a main circuit, a heating body, a control circuit, a temperature sensor and a heat conduction platform; the location connection relationship of the main circuit, the heating body, the control circuit, the temperature sensor and the heat conduction platform is as follows: the heating body forms a loop together with an AC 220V alternating current power supply by means of the main circuit, one of working surfaces is in close contact with the heat conduction platform with a good heat conductivity coefficient by heat conductive silicone grease, and the rest working surfaces are respectively and tightly wrapped by sheathing paper except the working surface of the heat conduction platform; a gate electrode of a bidirectional thyristor in the main circuit is connected with the control circuit by a lead; the temperature sensor is in contact with the heat conduction platform and is connected with the control circuit by a lead. After the structure is adopted, the COD digestion instrument adopts the main circuit formed by the bidirectional thyristor to heat the heating body of the COD digestion instrument, realizes accurate control on a heating process by combining the technologies such as pulse width modulation, zero-cross detection and zero-voltage turning-on, and reduces the switching loss of the thyristor.
Description
Technical field
The present invention provides a kind of cod to clear up instrument, belongs to technical field of analytical instruments.
Background technology
Cod (chemical oxygen demand), i.e. COD, refer under conditions of necessarily strictly, in water
Reducing substanceses in the presence of additional strong oxidizer, oxidized decompose when consumed oxidant quantity.Using chemistry
Reducing substanceses oxidation Decomposition in water, the gauge of the oxidant according to residual are calculated the consumption of oxygen by oxidant.Chemistry needs
Oxygen amount cod reflects the degree being polluted by reducing substanceses in water, and these materials include Organic substance, nitrite, ferrous salt, sulfur
Compound etc., but in general water and waste water, the quantity of inorganic reduction material is relatively little, and be very universal by Organic Pollution,
Therefore, cod can be less as organic substance relative amount a important indicator, its value, illustrates that water pollution degree is lower.
Carry out cod testing experiment at present, need to clear up instrument using cod that to heat the reaction containing sample and oxidant molten
Liquid, so as to there is redox reaction, to accelerate clearing up of sample, so that the Organic substance complete oxidation in sample, and then is surveyed
The COD of random sample product.
Current cod clears up instrument typically using the main circuit structure carrying out high frequency conversion (as buck circuit) after rectification, should
Structure is complex, indirectly increases equipment instrument；And high-frequency signal can produce interference to system, affect control accuracy；Simultaneously
The device for power switching that high frequency conversion is adopted has that power attenuation is big during turning on and off.
Content of the invention
(1) goal of the invention:
It is an object of the invention to provide a kind of cod using power device bidirectional thyristor as main circuit clears up instrument, directly
Ac220v alternating current power supply is controlled, its structure is simple, and does not have High-frequency Interference.In conjunction with zero passage detection technology, realize zero electricity
Press off logical, reduce the switch power loss of bidirectional thyristor；Realize the precise control of heating power in conjunction with Single-chip Controlling.
(2) technical scheme:
For achieving the above object, the technical solution used in the present invention is:
A kind of cod of the present invention clears up instrument, and it includes main circuit, calandria, control circuit, temperature sensor and heat conduction and puts down
Platform.Position annexation between them is: described calandria passes through main circuit and forms loop, one with ac220v alternating current power supply
Individual working surface is tight contacted between by the heat-conducting silicone grease heat conduction platform good with heat conductivity, except the working surface of heat conduction platform, its
Remaining each face is all tightly wrapped up by sheathing paper；In described main circuit, the gate pole of bidirectional thyristor is connected by wire with control circuit；
Described temperature sensor is contacted with heat conduction platform and is connected with control circuit by wire；
Described main circuit is a bidirectional thyristor of connecting on ac220v alternating current power supply zero line, and ac220v alternating current fire wire is straight
It is connected to one electrode of calandria in succession, ac220v alternating current power supply zero line exports to another electrode of calandria through bidirectional thyristor；
Described calandria is the Resistant heating body of customization；
Described control circuit includes filter and amplification unit, single chip control unit, zero passage detection unit, pwm isolation drive
Unit, temperature setting unit and temperature retention time setup unit；Their relations each other are: filter is passed through in described temperature sensor
Ripple amplifying unit is connected with single chip control unit, and described single chip control unit and pwm isolation drive unit, temperature set single
Unit is connected with temperature retention time setup unit, the input of described zero passage detection unit terminate ac220v ac power output and pwm every
It is connected from driver element, described pwm isolation drive unit outfan is connected with the gate pole of bidirectional thyristor in main circuit；
Further, described filter and amplification unit includes differential amplifier circuit and voltage filter amplifying circuit, differential amplification
The outfan of circuit connects to the input of voltage filter amplifying circuit, described differential amplifier circuit and voltage filter amplifying circuit
It is to be made up of integrated operational amplifier lm258 and its peripheral circuit, the benchmark of described differential amplifier circuit is measuring resistance when 0 DEG C
Partial pressure value；
Further, described single chip control unit is to be made up of single-chip microcomputer mc9s08dz60mlc and its peripheral circuit, defeated
Go out pulse-width signal (pwm signal)；
Further, described zero passage detection unit is by photoelectrical coupler tlp521-2, audion 9014, NAND gate circuit
Chip cd4011 and its peripheral circuit are constituted；They each other position connect relation be: ac220v power firestreak remove and light
4 feet of electric coupler tlp521-2 are connected outer, are also connected with stabilivolt z2 negative electrode, the anode of stabilivolt z2 and photoelectrical coupler
1 foot of tlp521-2 is connected, and ac220v zero-power line, in addition to being connected with 2 feet of photoelectrical coupler tlp521-2, is gone back and stabilivolt
Z3 negative electrode is connected, and the anode of stabilivolt z3 is connected with 3 feet of photoelectrical coupler tlp521-2, and the 5 of photoelectrical coupler tlp521-2
It is connected with the base stage of audion 9014 after foot and 7 feet ground connection, 6 feet of photoelectrical coupler tlp521-2 and the parallel connection of 8 feet, audion
9014 base stage meets+5v through pull-up resistor simultaneously and powers, the grounded emitter of audion 9014, the colelctor electrode warp of audion 9014
Pull-up resistor meets+5v and powers, and 1 foot of NAND gate circuit chip cd4011 and 2 feet are connected simultaneously, not circuit chip cd4011's
7 feet ground connection, 14 feet of not circuit chip cd4011 meet+5v and power, 3 feet of not circuit chip cd4011 as outfan,
Output zero signal；
Further, described pwm isolation drive unit is by d trigger chip cd4013, audion 9014 and light thermocouple
Clutch tlp3042 is constituted；Their relations each other are: 4 feet of d trigger chip cd4013,7 feet and 6 feet ground connection, and d touches
14 feet sending out device chip cd4013 meet+5v and power, and 5 feet of d trigger chip cd4013 connect the pwm signal of single-chip microcomputer output, and d touches
3 feet sending out device chip cd4013 connect zero signal, and 1 foot of d trigger chip cd4013 is connected with the base stage of audion 9014, and three
The grounded emitter of pole pipe 9014, the colelctor electrode of audion 9014 connects 2 feet of photoelectrical coupler tlp3042, photoelectrical coupler
1 foot of tlp3042 meets+5v through pull-up resistor and powers, and 6 feet of photoelectrical coupler tlp3042 export as main circuit, photoelectric coupling
4 feet of device tlp3042 meet the gate pole g of bidirectional thyristor；
Further, described temperature setting unit and temperature retention time setup unit, by contact button and its peripheral circuit
Constitute；This contact button is the microswitch of 6x6x5；
Described temperature sensor is pt100 temperature sensor, and sampling work platform temperature signal, by filter amplification circuit
It is connected with single-chip microcomputer and peripheral circuit；
Described heat conduction platform be made using the good cast aluminium of heat conductivity and surface carry some can placing response test tube
The work platformses of counterbore；
(3) advantages of the present invention and effect:
After said structure, the cod of the present invention clears up the main circuit that instrument adopts bidirectional thyristor to constitute, and realizes to cod
Clear up the heating of instrument calandria, the technology such as open in conjunction with pulse width modulation, zero passage detection, no-voltage, realize heating process essence
Really control, and reduce thyristor switch loss.
Brief description
Below in conjunction with the drawings and specific embodiments to being originally described in further detail.
Fig. 1 is the electrical block diagram of the present invention.
Fig. 2 is the filter and amplification cell schematics of the present invention.
Fig. 3 is temperature setting unit and the temperature retention time setup unit schematic diagram of the present invention.
Fig. 4 is the zero passage detection cell schematics of the present invention.
Fig. 5 is the pwm isolation drive cell schematics of the present invention.
In figure:
1 is main circuit, and 2 is calandria, and 3 is temperature sensor, and 4 is control circuit, and 5 is heat conduction platform.
401 is single chip control unit, and 402 is filter and amplification unit, and 403 is temperature setting unit, and 404 is temperature retention time
Setup unit button, 405 is zero passage detection unit, and 406 is pwm isolation drive unit.
Specific embodiment
The specific embodiment of the present invention to be described below in conjunction with the accompanying drawings.
A kind of cod of the present invention clears up instrument, and shown in Figure 1, it includes: main circuit 1, calandria 2, temperature sensor 3, control
Circuit 4 processed, heat conduction platform 5；Described calandria 2 passes through main circuit 1 and forms loop, one worksheet with ac220v alternating current power supply
Face is passed through the heat-conducting silicone grease heat conduction platform 5 good with heat conductivity and is tight contacted between, except the working surface of heat conduction platform 5, remaining each face
All tightly wrapped up by sheathing paper；In described main circuit 2, the gate pole g of bidirectional thyristor is connected by wire with control circuit 4；Described
Temperature sensor 3 is contacted with heat conduction platform 5 and passes through wire and is connected with control circuit 4.
Shown in Figure 1, described main circuit 1 is the bidirectional thyristor t1 that connects on ac220v alternating current zero line,
Ac220v alternating current fire wire is connected directly to 2 one electrodes of calandria, and ac220v alternating current zero line exports through bidirectional thyristor t1
To another electrode of calandria 2.The turning on and off of bidirectional thyristor t1 in main circuit 1 is controlled by control circuit 4, realizes defeated
Go out heating power 0～100% continuously adjustabe, realize the precise control to temperature.
Shown in Figure 1, calandria 2 is resistor-type calandria, and this calandria 2 is connected with the outfan of main circuit 1, plus
One working surface of hot body 2 is in close contact with heat conduction platform 5 by heat-conducting silicone grease, constitutes overall, and this integrally removes heat conduction platform 5
Working surface, remaining each face all tightly wrapped up by sheathing paper, realizes insulation, and prevents high temperature impact circuit malfunction.Calandria 2
Heating and the insulation of different capacity is realized under the different output of main circuit.
Shown in Figure 1, temperature sensor 3 is pt100 temperature sensor, and temperature sensor 3 is passed through heat-conducting silicone grease and led
Hot platform 5 internal whorl is in close contact, and the filter and amplification unit 402 that its output signal is passed through in control circuit 4 exports to monolithic
Machine control unit 401.
Shown in Figure 1, control circuit 4 includes single chip control unit 401, filter and amplification unit 402, temperature setting list
Unit 403, temperature retention time setup unit 404, zero passage detection unit 405, pwm isolation drive unit 406.Temperature sensor 3 is passed through
Filter and amplification unit 402 is connected with single chip control unit 401, described single chip control unit 401 and temperature setting unit
403rd, temperature retention time setup unit 404, pwm isolation drive unit 405 are connected, zero passage detection unit 405 input termination ac220v
Ac power output is connected with pwm isolation drive unit 406, described pwm isolation drive unit 406 outfan and main circuit 1
The gate pole g of middle bidirectional thyristor t1 is connected.
Wherein, the temperature signal that temperature sensor 3 gathers carries out defeated after signal filtering amplification via filter and amplification unit 402
Enter to single chip control unit 401 to carry out collection and the calculating of temperature signal.Temperature setting unit 403 and temperature retention time set list
Unit 404 is connected with single chip control unit 401, carries out the communication of design temperature and temperature retention time.Single by controlling temperature to set
Unit 403 and the contact button of temperature retention time setup unit 404, carry out the selection of design temperature and temperature retention time.Single-chip Controlling
Single-chip microcomputer within unit 401 adopts mc9s08dz60mlc single-chip microcomputer, and single chip control unit 401 removes collection filter and amplification list
The setting of the temperature signal, the design temperature signal of temperature setting unit 403 and temperature retention time setup unit 404 of unit 402 output
Outside temperature retention time signal, export road pulse width modulating signal pwm (dutycycle is in 0～100% continuously adjustabe) output simultaneously
To pwm isolation drive unit 406.Zero passage detection unit 405 detection main circuit 1 input ac220v alternating current, collection voltages zero passage
The signal zero in moment, and with single chip control unit 401 output pulse width modulating signal pwm work in coordination with output to pwm every
From driver element 406, thus the conducting of isolation drive bidirectional thyristor t1 no-voltage.
Shown in Figure 2, filter amplification circuit 402 includes differential amplifier circuit 4021 and voltage filter amplifying circuit
4022, the outfan of differential amplifier circuit 4021 connects to the input of voltage filter amplifying circuit 4022, differential amplifier circuit
4021 benchmark is the partial pressure value of pt100 resistance temperature sensor value when 0 DEG C.Differential amplifier circuit 4021 part in the present embodiment
Amplifier and voltage filter amplifying circuit 4022 in amplifier be respectively adopted two amplifiers of operational amplifier u1, this reality
Applying operational amplifier in example is integrated operational amplifier lm258.Filter amplification circuit 402 using through manostat tl431 voltage stabilizing+
2.5v voltage-reference, the voltage signal of pt100 temperature sensor feedback passes through the measuring resistance (100 ω) when lm258 and 0 DEG C
Partial pressure value carry out differential amplification, the amplifier of 5,6,7 feet of lm258 is differential amplifier, temperature sensor 3 output signal one
End is connected with 5 feet of lm258, and the other end is connected with 6 feet of lm258.After differential amplification, then through by lm258's
2nd, the amplifying circuit of the amplifier of 3,7 feet and its peripheral circuit composition, carries out the amplification filtering of voltage signal, finally obtains and real
The corresponding voltage signal of testing temperature, this voltage signal exports and enters row operation and process to single chip control unit 401.
Shown in Figure 3, temperature setting unit 403 and temperature retention time setup unit 404 are respectively by contact button s1 and s2
And its peripheral circuit is constituted, and it is connected with single chip control unit 401.In the present embodiment, inside single chip control unit 401
Design several temperature and temperature retention time, and be provided with corresponding display lamp, only difference need to be carried out by contact button s1 and s2
The selection of temperature and temperature retention time parameter and setting.
Shown in Figure 4, zero passage detection unit 405 main by photoelectrical coupler tlp521-2, audion 9014 and with non-
Gate circuit chip cd4011 and its peripheral circuit are constituted.The voltage stabilizing value of wherein z2, z3 stabilivolt is+5v, when ac220v alternating current
It is in+5v to 0v stage or -5v to the 0v stage, photoelectrical coupler tlp521-2 does not work, the base voltage of audion 9014
It is pulled up resistance r16 to draw high, 9014 work, grounded collector, trailing edge in this section of change procedure transistor collector voltage,
And through rc delay circuit by this trailing edge time delay to the ac220v alternating current no-voltage moment, realize zero passage detection.This trailing edge
Change into rising edge through NAND gate circuit chip cd4011.
Shown in Figure 5, described pwm isolation drive unit is by d trigger chip cd4013, audion 9014 and photoelectricity
Bonder tlp3042 and its peripheral circuit are constituted.The pulse width modulating signal pwm being produced by single chip control unit 401 is defeated
Go out to the d foot of cd4013, the zero passage detection signal zero that zero passage detection unit 405 produces exports to the clk foot of cd4013, when
Rising edge (as it was previously stated, now ac220v alternating current zero passage) in zero, and pwm is in high level, the q foot output of cd4013
To audion 9014 base stage, ground put by 9014 colelctor electrodes to high level, and meanwhile, photoelectrical coupler tlp3042 works, bidirectional thyristor t1
Gate pole g meet load, bidirectional thyristor is open-minded.So far, realize the heating to calandria for the main circuit.Due to single chip control unit
The pwm signal dutyfactor of 401 outputs is in 0～100% continuously adjustabe, therefore enables output in 0～100% continuously adjustabe.
And by adopting zero passage detection, realize bidirectional thyristor t1 no-voltage and open so that the switching loss of bidirectional thyristor t1 is
Zero.
By using above-mentioned embodiment, obtaining a kind of structure simply, the cod that temperature control is accurate, power attenuation is low
Clear up instrument.
Although the foregoing describing the specific embodiment of the present invention, those skilled in the art should be appreciated that this
It is merely illustrative of, various changes or modifications can be made to present embodiment, without departing from the principle invented and essence, this
The protection domain of invention is only limited by the claims that follow.
Claims (3)
1. a kind of cod clear up instrument it is characterised in that: it includes main circuit, calandria, control circuit, temperature sensor and heat conduction
Platform；Position annexation between them is: described calandria passes through main circuit and forms loop with ac220v alternating current power supply, its
One working surface is tight contacted between by the heat-conducting silicone grease heat conduction platform good with heat conductivity, except the working surface of heat conduction platform,
Remaining each face is all tightly wrapped up by sheathing paper；In described main circuit, the gate pole of bidirectional thyristor and control circuit pass through wire phase
Even；Described temperature sensor is contacted with heat conduction platform and is connected with control circuit by wire；
Described main circuit is a bidirectional thyristor of connecting on ac220v alternating current power supply zero line, and ac220v alternating current fire wire directly connects
It is connected to one electrode of calandria, ac220v alternating current power supply zero line exports to another electrode of calandria through bidirectional thyristor；
Described calandria selects Resistant heating body；
Described control circuit include filter and amplification unit, single chip control unit, zero passage detection unit, pwm isolation drive unit,
Temperature setting unit and temperature retention time setup unit；Their relations each other are: described temperature sensor is put by filtering
Big unit is connected with single chip control unit, described single chip control unit and pwm isolation drive unit, temperature setting unit and
Temperature retention time setup unit is connected, and described zero passage detection unit input termination ac220v ac power output is driven with pwm isolation
Moving cell is connected, and described pwm isolation drive unit outfan is connected with the gate pole of bidirectional thyristor in main circuit；
Further, described filter and amplification unit includes differential amplifier circuit and voltage filter amplifying circuit, differential amplifier circuit
Outfan connect to the input of voltage filter amplifying circuit, described differential amplifier circuit and voltage filter amplifying circuit are served as reasons
Integrated operational amplifier lm258 and its peripheral circuit are constituted, the benchmark of described differential amplifier circuit be when 0 DEG C measuring resistance point
Pressure value；
Further, described single chip control unit is to be made up of single-chip microcomputer mc9s08dz60mlc and its peripheral circuit, exports arteries and veins
Wide modulated signal is pwm signal；
Further, described zero passage detection unit is by photoelectrical coupler tlp521-2, audion 9014, NAND gate circuit chip
Cd4011 and its peripheral circuit are constituted；They each other position connect relation be: ac220v power firestreak remove and light thermocouple
4 feet of clutch tlp521-2 are connected outer, are also connected with stabilivolt z2 negative electrode, the anode of stabilivolt z2 and photoelectrical coupler
1 foot of tlp521-2 is connected, and ac220v zero-power line, in addition to being connected with 2 feet of photoelectrical coupler tlp521-2, is gone back and stabilivolt
Z3 negative electrode is connected, and the anode of stabilivolt z3 is connected with 3 feet of photoelectrical coupler tlp521-2, and the 5 of photoelectrical coupler tlp521-2
It is connected with the base stage of audion 9014 after foot and 7 feet ground connection, 6 feet of photoelectrical coupler tlp521-2 and the parallel connection of 8 feet, audion
9014 base stage meets+5v through pull-up resistor simultaneously and powers, the grounded emitter of audion 9014, the colelctor electrode warp of audion 9014
Pull-up resistor meets+5v and powers, and 1 foot of NAND gate circuit chip cd4011 and 2 feet are connected simultaneously, not circuit chip cd4011's
7 feet ground connection, 14 feet of not circuit chip cd4011 meet+5v and power, 3 feet of not circuit chip cd4011 as outfan,
Output zero signal；
Further, described pwm isolation drive unit is by d trigger chip cd4013, audion 9014 and photoelectrical coupler
Tlp3042 is constituted；Their relations each other are: 4 feet of d trigger chip cd4013,7 feet and 6 feet ground connection, d trigger
14 feet of chip cd4013 meet+5v and power, and 5 feet of d trigger chip cd4013 connect the pwm signal of single-chip microcomputer output, d trigger
3 feet of chip cd4013 connect zero signal, and 1 foot of d trigger chip cd4013 is connected with the base stage of audion 9014, audion
9014 grounded emitter, the colelctor electrode of audion 9014 meets 2 feet of photoelectrical coupler tlp3042, photoelectrical coupler tlp3042
1 foot meet+5v through pull-up resistor and power, 6 feet of photoelectrical coupler tlp3042 export as main circuit, photoelectrical coupler
4 feet of tlp3042 meet the gate pole g of bidirectional thyristor；
Further, described temperature setting unit and temperature retention time setup unit, is constituted by contact button and its peripheral circuit；
This contact button is the microswitch of 6x6x5；
Described temperature sensor sampling work platformses temperature signal, by filter amplification circuit and single-chip microcomputer and peripheral circuit phase
Even；
Described heat conduction platform for surface carry can placing response test tube counterbore work platformses.
2. a kind of cod according to claim 1 clear up instrument it is characterised in that: described temperature sensor be pt100 temperature
Sensor.
3. a kind of cod according to claim 1 clear up instrument it is characterised in that: described heat conduction platform adopts heat conductivity
Good cast aluminium makes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610860669.7A CN106370508B (en) | 2016-09-28 | 2016-09-28 | COD digestion instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610860669.7A CN106370508B (en) | 2016-09-28 | 2016-09-28 | COD digestion instrument |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106370508A true CN106370508A (en) | 2017-02-01 |
| CN106370508B CN106370508B (en) | 2023-05-12 |
Family
ID=57898255
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610860669.7A Active CN106370508B (en) | 2016-09-28 | 2016-09-28 | COD digestion instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106370508B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956512A (en) * | 2018-07-25 | 2018-12-07 | 东南大学 | A kind of Multifunctional water Portable rapid detector and its application method and detection method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4053733A (en) * | 1974-08-06 | 1977-10-11 | Minolta Camera Kabushiki Kaisha | Temperature control device |
| JPH07249481A (en) * | 1994-03-09 | 1995-09-26 | Zojirushi Corp | Electric power control circuit |
| CN2781352Y (en) * | 2005-03-24 | 2006-05-17 | 华中科技大学 | Portable sample quickly pretreatment device for monitoring environment and food |
| CN103312308A (en) * | 2013-06-26 | 2013-09-18 | 湖南工业大学 | Thyristor triggering device and method |
| CN104359752A (en) * | 2014-12-03 | 2015-02-18 | 北京东航科仪仪器有限公司 | Electric heating digestion instrument |
| CN206057071U (en) * | 2016-09-28 | 2017-03-29 | 北京东航科仪仪器有限公司 | A kind of COD clears up instrument |
-
2016
- 2016-09-28 CN CN201610860669.7A patent/CN106370508B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4053733A (en) * | 1974-08-06 | 1977-10-11 | Minolta Camera Kabushiki Kaisha | Temperature control device |
| JPH07249481A (en) * | 1994-03-09 | 1995-09-26 | Zojirushi Corp | Electric power control circuit |
| CN2781352Y (en) * | 2005-03-24 | 2006-05-17 | 华中科技大学 | Portable sample quickly pretreatment device for monitoring environment and food |
| CN103312308A (en) * | 2013-06-26 | 2013-09-18 | 湖南工业大学 | Thyristor triggering device and method |
| CN104359752A (en) * | 2014-12-03 | 2015-02-18 | 北京东航科仪仪器有限公司 | Electric heating digestion instrument |
| CN206057071U (en) * | 2016-09-28 | 2017-03-29 | 北京东航科仪仪器有限公司 | A kind of COD clears up instrument |
Non-Patent Citations (2)
| Title |
|---|
| 卢永芳;: "基于单片机控制的电热炉温控系统", 焦作大学学报 * |
| 杜慧聪;刘方军;赵晶;张伟;: "基于PIC16F883单片机的石墨消解仪设计", 自动化与仪表 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108956512A (en) * | 2018-07-25 | 2018-12-07 | 东南大学 | A kind of Multifunctional water Portable rapid detector and its application method and detection method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106370508B (en) | 2023-05-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN209265296U (en) | A kind of TEC temperature control device | |
| CN205407654U (en) | Food preparation machine circuit and food preparation machine | |
| CN204858163U (en) | Intelligence switch controller | |
| CN204928230U (en) | Special electrical source controller of ambiguity | |
| CN104539170A (en) | Three-level Cuk voltage regulation constant current source and operation method thereof | |
| CN206057071U (en) | A kind of COD clears up instrument | |
| CN106370508A (en) | Chemical oxygen demand (COD) digestion instrument | |
| CN204389062U (en) | A kind of IGBT for Active Power Filter-APF saves warm sample circuit | |
| CN104359752A (en) | Electric heating digestion instrument | |
| CN205642489U (en) | Type hot type gas flow measuring device is diped in low -power consumption | |
| CN203759564U (en) | Double closed-loop temperature control circuit | |
| CN204287859U (en) | Based on embedded ARM processor oil pipeline cathodic protection protection power source device | |
| CN206557626U (en) | A kind of smart electronicses temperature controller | |
| CN203929137U (en) | A kind of electromagnetic measurement water meter | |
| CN207977206U (en) | A kind of transformer heating system | |
| CN202995499U (en) | SCM-based temperature control system | |
| CN106949938A (en) | A kind of cereal on-Line Monitor Device | |
| CN105784035A (en) | Low-power-consumption and immersed type thermal gas flow measuring method and device | |
| CN103062832B (en) | Solar energy heating control system and method thereof | |
| CN208936559U (en) | A kind of protection controller of water heater | |
| CN205160469U (en) | A monitor cell for photovoltaic power generation system monitoring devices | |
| CN204287269U (en) | A kind of Multifunctional three-phase electric energy table of direct access | |
| CN103138606A (en) | Energy conservation type switch power source | |
| CN205229372U (en) | A grounding detection acousto -optic warning module | |
| CN205429729U (en) | Economizer system is improved to electric energy quality |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |