The instrument is used for the determination of calorific value of solid, liquid and other combustibles (coal, petroleum food, wood, explosives).
This instrument is a new kind of energy saving analysis instrument developed by our company. Use color, touch monitor, all Chinese display, user interface is good. The measurement process is automatically controlled to reduce the human error. Printing cartridge, dry base high,
Analysis base high, analysis base low, received base heat, the result is clear and clear
Second. Technical features:
1. Intelligent MCU is adopted to construct embedded system with simple structure, reliable performance and strong anti-interference ability.
The test steps of flushing, releasing water, fixing water level, stirring, firing, tempering, adjusting, calculating and printing are completed automatically, avoiding human error and improving accuracy and precision.
With the unique correction technology, the instrument is relatively loose to the environment, while improving the accuracy of the test, it also guarantees the stability of long running time.
Third. The working principle of
0.9 ~ 1.1 g into the object under test heat crucible (heat resistant and corrosion resistant), the crucible in with 2.8 ~ 3.2 MPa oxygen bomb, placed in heat meter tube, inner tube with distilled water, added fuel to ignite the heat released distilled water, according to the heat capacity of water temperature rise in quantity and amount heating system, can calculate the calorific value of fuel.
Forth. Technical indicators
Heat capacity: about 10500 J/K
oxygen bomb capacity: 300ml.
Oxygen pressure: 2.8~3.2 MPa.
Pressure resistance: water pressure 20MPa.
External dimensions: 86.2 x 181 mm.
Temperature range: 0 ~ 40 ℃
Response time: < 4 S.
Resolution: 0.0001 ℃
Linear degrees: every 5 ℃ temperature rise within the scope of < 0.08%
Temperature measurement error: every 5 ℃ temperature range accuracy of plus or minus 0.003 ℃
Power supply voltage: AC220V plus or minus 10%.
Wet degree: 80% or less
30 w power:
Ignition voltage: AC24V.
Ignition time: 5S
Fifth. Instrument structure and ancillary equipment.
Calorimeter host structure.
One.The host of calorimeter is: shell, water tank, control system, user interface, etc.
Two.The water tank is made of stainless steel and made of double-layer sleeve.
Sixth. The use of instruments.
Open box inspection: after opening the box, check the appearance of the equipment, whether there is any injury, whether the accessories are complete, etc. If the above problems occur, please contact the manufacturer in time. Calorimetric apparatus should be installed in no strong air convection, is not subject to direct sunlight, temperature should not be more than 1 ℃ in the room, room temperature within 15 ~ 30 ℃ advisable. Place the calorimeter on a horizontal surface or on the worktable to connect to the power supply. Add water temperature to the room temperature equivalent to the distilled water, add to the overflow mouth water overflow.
.The main interface of the instrument is as follows.
【Heat capacity】: click the white display box in the back of the heat capacity, the keyboard will be displayed, and the heat capacity of the heat capacity system can be input, which is proportional to the value of the calorific value measured. Enter the mean value of the specified heat capacity, click return, save and return to the main interface of the system.
【standard heat value】 : click the white display box after the standard heat value, and the keyboard can be entered to enter the standard heat value. The heat value of the standard substance used when calibrating the instrument, according to the data on the packaging of the standard substance used, direct input, click return, save and return to the main interface of the system. 【water injection time】 : click the white display box in the back of the waterflood time, and the keyboard will pop up to input water injection time. The water injection time of the inner tube is related to the experimental precision. According to the oxygen bomb volume and voltage, enter the appropriate value, click return, save and return to the superior menu. 【drainage time】 : click the white display box after the drainage time, and the keyboard will be displayed, and the drainage time can be input. Set the appropriate drainage time and exclude the inner tube test water. 【hot】: click on the white display box in the back of the ignition, and the keyboard will pop up. The heat produced by the ignition is 150J at the time of delivery. The length of the ignition wire and the cotton thread is unchanged, and it is not required to change. To change, enter a new value, click return, save and return to the superior menu. 【add value】 : click the white display box in the back of the add value, pop up the keyboard, and enter the add value. For coal or other combustibles with low calorific value, additional combustion substances are required to ensure that the sample can be fully burnt. Enter the heat value of the addition (unit is J/g), click return, save and return to the superior menu. 【print mode】 : click the print mode, and the following number is switched between 0 and : one.it represents automatic printing, that is, the test results will be automatically printed after the experiment.
one: means manual printing. After the test is finished, the result is not printed. 【print format 】: click the print format, and the following Numbers switch between 0 and 1: standard format 1: compact format.
It only works for heat. 【 Data processing】 : click on the data processing, into the figure 3 sulfur hydrogen water directly affect the high and low calorific value, input, sulfur, hydrogen water barrel heat (unit: j/g), and click calculate, and can calculate the high and low heat, click on the unit, can be in calories, joule per gram, switching between megajoule/kg. This function can be used to determine the calorific value of the hydrogen sulfide without producing it. After the data of hydrogen sulfide is made, data processing is performed under this function. 【system test]】: click system test to enter the test interface
click on calorific value test, calorific value trial begins，The interface switch is as follows：
click calibration, calibration trial begins，The interface switch is as follows：
Input sample weight, number and other test data. Click on the return，Return to the heat capacity measurement interface.
"reset" end of the test, if you press the key ignition failure, instrument back to standby mode. Note: after using the data processing, click the key to clear the processing trace, so as not to affect the print result.
【calibration of heat capacity】
Said benzoic acid (0.9 ~ 1.1 g) and oxygen bomb, oxygen filling 15 ~ 45 seconds, pressure is 2.8 ~ 3.2 MPa, into the inner cylinder, click on the "heat capacity determination", referred to the input weight of benzoic acid, after more than ten minutes, instrument print calibration of heat capacity E, again and again for 5 ~ 6, calculate the average, save in the system input, do 1 ~ 2 benzoic acid of calorific value, take the cartridge calorific value compared with standard calorific value, the error is less than 120 j, is the successful calibration.
according to take samples in determination of calorific value (0.9 ~ 1.1 g), pack good oxygen bomb, oxygen filling 15 ~ 45 seconds, pressure is 2.8 ~ 3.2 MPa, into the inner cylinder, click on the "heat", the instrument started, in determination of calorific value referred to the input sample weight, input weight of additives, such as no additives, enter 0. The results are displayed and printed after the test.
【Common failures and troubleshooting methods.】
1、The phenomenon of： Oxygen bomb leakage.
Why：Aging or wear of rubber sealing ring.
To deal with：Replace the seal ring
The phenomenon of：
2、The phenomenon of：Ignition failure
Why：①Failure to connect the line or ignition wires.
③The ignition wire or cotton thread is not in contact with the sample.
④Two electrodes are too dirty.
⑤The ignition cap is oxidized.
⑥A short circuit of two electrodes and a crucible (which can easily burn the crucible and electrode)
To deal with：①Check whether the attachment is connected, the oxygen warhead is in contact with the ignition cap, and whether the oxygen bomb is in place.
②The sample is wet with oxygen.
④Use sandpaper to polish the electrodes.
⑤Use sandpaper to burnish the ignition cap oxides.
⑥Replace the electrode or crucible reloading.
3、The phenomenon of： Incomplete combustion.
Why：Non-flammable sample；Insufficient oxygen or insufficient oxygen pressure.
To deal with ：Use a mirror to wrap the sample to extend the oxygenation time and replace the oxygen cylinder.
4、The phenomenon of： After ignition, the temperature rises too high and the calorific value is too high.
Why:①The mixer does not turn.
②The stirring leaves fall off.
To deal with :①The stirring shaft card dies, the line is blocked.
②Use a cotton insert into the nylon bar connected to the stirring shaft.
5、The phenomenon of： The experiment is not over for a long time.
Why:High ambient temperature
To deal with ：The temperature of the external cylinder is basically the same as that of room temperature, or low indoor temperature.
6、The phenomenon of： Leakage of oxygen apparatus.
Why:Aging or abrasion of the seal ring.
To deal with ：Replace the seal ring