CN206828451U - A kind of microwave-heating device with carrier gas Hybrid Heating and oil collecting function - Google Patents
A kind of microwave-heating device with carrier gas Hybrid Heating and oil collecting function Download PDFInfo
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- CN206828451U CN206828451U CN201720556156.7U CN201720556156U CN206828451U CN 206828451 U CN206828451 U CN 206828451U CN 201720556156 U CN201720556156 U CN 201720556156U CN 206828451 U CN206828451 U CN 206828451U
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- gas
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- heater
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- 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
- Y02E50/10—Biofuels, e.g. bio-diesel
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- Physical Or Chemical Processes And Apparatus (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The utility model discloses a kind of microwave-heating device with carrier gas Hybrid Heating and oil collecting function；Including the gas mixer for being mixed to the different types of inert gas being passed through；Carrier gas heater；The quartz reaction kettle for being used to place microwave-heating material being placed in microwave cavity room；High-temperature flue gas filter；Condenser；Oil collector sump tank；Blower fan；Pipeline connects successively for gas mixer, carrier gas heater, quartz reaction kettle, high-temperature flue gas filter, condenser, oil collector sump tank, blower fan；Blower fan is used to make to form negative pressure in pipeline.This microwave-heating device is simple and feasible, can effectively improve the oil-collecting efficiency of microwave-heating, realizes more accurate, more cleaning, the experiment of safer microwave-heating.
Description
Technical field
It the utility model is related to microwave-heating device, more particularly to it is a kind of micro- with carrier gas Hybrid Heating and oil collecting function
Ripple pyrolysis installation.
Background technology
At present, the reproducible utilization matter energy such as biomass, sludge, rubbish Land use systems generally have the side such as burning, pyrolysis
Formula.The efficiency of burning is higher than pyrolysis, but the discharge such as bioxin, flying dust, nitrogen oxides is larger, it is necessary to there is perfect vent gas treatment
System.And biomass energy can be converted into the three-phase energy products such as gas, liquid, solid by being pyrolyzed, exhaust gas volumn is few, flying dust amount is few, reduction
Property atmosphere under produce bioxin it is few, but efficiency less than burn.Conventional pyrolytic mode is made according to heat transfer, convection current and radiation theory
Heat reaches material from outside, makes material heating pyrolysis, and the firing rate of this mode is slow and thermograde be present, heating effect
Rate is relatively low.And microwave-heating be by heated object internal dipole molecule high-frequency reciprocating move, produce " interior frictional heat " and make by
Heated material temperature raises, and is not necessary to any heat transfer process, and with regard to that can make material inside and outside portion while heat while heat up, heating is fast
Degree is fast and uniform, and the efficiency of heating surface is high.Have using reproducible utilization materials such as microwave-heating technical finesse biomass, sludge, rubbish
Have the advantages that hazardous emission is few, efficiency high, therefore, microwave-heating technology causes the extensive concern of domestic and international researcher,
And numerous studies are carried out.
Biological particles are cracked into rapidly charcoal and volatile matter by the composition that microwave heats, wherein, volatile matter is by condensable
Gas and non-condensable gas composition.In microwave-heating biomass process, only some condensable gas can be received in bio-oil
Acquisition means are condensed and collected, meeting when by reactor cold wall face or cold pipe wall of another part condensable gases
Condense out.This can not only reduce the oil productivity of raw material, and can pollute reactor wall, or even cause tube blockage.For
Industrial processes, condensable gas can reduce total oil yield in reactor wall, tube passage condensation, and add clear
Clean cost, the economy of production is not met；For the microwave-heating experimentation in laboratory, such case can be unfavorable for determining
Solid, liquid, gas three-phase product true production, and certain time Dishwasher is expended, it is unfavorable for the accuracy of experiment.Therefore,
How the oil productivity of biomass microwave pyrolysis is improved, for realizing more efficient, more cleaning, safer microwave-heating industrial production
Small microwave experiment more accurate with progress is significant and influenceed.
The content of the invention
The shortcomings that the purpose of this utility model is to overcome above-mentioned prior art and deficiency, there is provided one kind has carrier gas mixing
Heating and the microwave-heating device of oil collecting function.The collecting effect of pyrolysis oil can be improved, improve the accuracy of microwave-heating experiment
And security, and two kinds of different carrier gas are sufficiently mixed rear access equipment or switch pyrolysis atmosphere at any time in proportion when can realize experiment
Function.
The utility model is achieved through the following technical solutions：
A kind of microwave-heating device with carrier gas Hybrid Heating and oil collecting function, including such as lower component：
For the gas mixer 5 mixed to the different types of inert gas being passed through；
Carrier gas heater 6；
The quartz reaction kettle 13 for being used to place microwave-heating material being placed in microwave chamber 12；
High-temperature flue gas filter 14；
Condenser 15；
Oil collector sump tank 17；
Blower fan 20；
The gas mixer 5, carrier gas heater 6, quartz reaction kettle 13, high-temperature flue gas filter 14, condenser 15, collection
Pipeline connects successively for oily device 17, blower fan 20；Blower fan 20 is used to make to form negative pressure in pipeline.
The gas mixer 5 is rectangular box；An air inlet is respectively distributed with four angles of rectangular box；
Gas A passes sequentially through the first needle-valve 1, first gas flowmeter 2 is sent into two adjacent air inlets；
Gas B passes sequentially through the second needle-valve 3, second gas flowmeter 4 is sent into remaining two adjacent air inlets；
Both gases form tangential fluid field in gas mixer 5 and mutually intervolve suction and are threadingly advanced, both gas
Body is passed into carrier gas heater 6 after being sufficiently mixed in gas mixer 5.
The spoiler 61 that polylith is vertically spaced apart is provided with the carrier gas heater 6；It is equal in the positive and negative of spoiler 61
It is scored with " V " type groove；Gas A and gas B after being sufficiently mixed move ahead in the presence of spoiler 61 in serpentine motion.
On pipeline between carrier gas heater 6 and quartz reaction kettle 13 pressure is disposed with according to gas flow direction
Transmitter 8, the first temperature transmitter 9；
On pipeline between oil collector sump tank 17 and blower fan 20 according to gas flow direction be disposed with the 4th needle-valve 18,
Third gas flowmeter 19.
Quartz reaction kettle 13 is placed on electronic balance 21.
The inwall of quartz reaction kettle 13 is pasted with asbestos heat-insulation layer 11；The probe of second temperature transmitter 10 is anti-from quartz
The hole of the top of kettle 13 is answered to stretch into microwave-heating material.
Coiling heater strip in carrier gas heater 6, the gas from carrier gas heater 6 is heated by external transformer 7.
A kind of microwave-heating method with carrier gas Hybrid Heating and oil collecting function, it comprises the following steps：
Step 1：Before microwave-heating experiment, the lid on the both sides of quartz reaction kettle 13 is opened, microwave-heating material is put into
Behind the centre position of quartz reaction kettle 13, then lid covered again, and connect gas A and gas B carrier gas line；
Step 2：Then second temperature transmitter 10 is put into from the hole above quartz reaction kettle 13, puts in its probe micro-
Behind the centre position of ripple pyrolysis material, the hole is sealed with quartz plug；The shield door of microwave chamber 12 is shut, starts to test；
Step 3：During experiment, the first needle-valve 1, the second needle-valve 3 are first turned on, is passed through or to be passed through gas A in proportion gentle
Body B, gas A and gas B can be passed through from the corner of gas mixer 5, and gas A and gas B form corner in gas mixer 5
Circle of contact flow field simultaneously mutually intervolves suction and is threadingly advanced, and is sufficiently mixed；At the same time, open the 4th needle-valve 18 and connect and start blower fan 20, make
Negative pressure state is formed in each pipeline, pressure can be read by pressure transmitter 8；
Step 4：After first gas flowmeter 2, second gas flowmeter 4 and the registration of third gas flowmeter 19 are stable,
Cooling water is passed through to condenser 15, is also turned on the power supply of transformer 7, now gas A and gas B are heated to by carrier gas heater 6
More than 250 DEG C, and be passed into quartz reaction kettle 13；
Step 5：After the registration of the first temperature transmitter 9 is stable, microwave power switch is opened, and sets microwave power, will
Microwave-heating material in quartz reaction kettle 13 decomposes；Volatile matter in microwave-heating material can be generated and can coagulated by microwave-heating
Gas and non-condensable gas are tied, because quartz reaction kettle 13 takes asbestos heat-insulation layer 11, quartz reaction kettle 13 to condenser
Insulation material is employed on pipeline between 15, quartz reaction kettle 13 and this section of pipeline inner wall face temperature are positively retained at carrier gas temperature
More than 250 DEG C, therefore condensable gas product caused by microwave-heating filters out in flue gas micro- by high-temperature flue gas filter 14
Just start to condense into condenser 15 after grain；
Step 6：Gaseous product is entered from the upper port of condenser 15, and lower port goes out, and condensable gas can be in condenser 15
Then total condensation is pooled in the oil collector sump tank 17 after condenser 15, incondensable gas is then taken out by blower fan 20 into bio oil
Go out；
During experiment is carried out, first gas flowmeter 2, second gas flowmeter 4, pressure transmitter 8, the first temperature become
Device 9, second temperature transmitter 10, third gas flowmeter 19 and precision electronic balance is sent to detect gas stream everywhere in real time
The quality of microwave-heating material in amount, pressure, temperature and microwave chamber 12, and it is automatically sent to computer preservation.
After the question response time reaches, it is first shut off microwave power switch and transformer 5 switchs, continue to be passed through room temperature carrier gas
With the cooling water of condenser 15, after carrier gas heater 6 and quartz reaction kettle 13 are cooled into room temperature, stopping is passed through gas A, gas
B and cooling water, close blower fan 20；Now, it can be taken off the solid residue after microwave-heating in quartz reaction kettle 13；Open and set
The 3rd needle-valve 16 in the bottom of oil collector sump tank 17, container collection is discharged into by pyrolysis oil.
The utility model is had the following advantages and effect relative to prior art：
(1) used two pipelines to each lead into carrier gas, installed gas mixer additional, may be implemented in microwave-heating and tested
Two kinds of carrier gas are passed through pipeline or switch the function of pyrolysis atmosphere at any time in proportion in journey, are advantageous to experimenter and study various carrier gas
Influence to microwave-heating experiment；
(2) gas mixer is provided with, is passed through using gas from blender corner and forms the flow regime of quadrangle tangential circle,
It is sufficiently mixed gas；
(3) carrier gas heater has used polylith (three pieces) dividing plate and " V " type groove is engraved on dividing plate, both increases carrier gas
Residence time in heater, the disturbance in carrier gas flow field is enhanced again, so as to enhance the heating effect of carrier gas heater.This
Carrier gas temperature can be increased to more than 250 DEG C by heater, and steam can be coagulated caused by microwave-heating in the case where the carrier gas of this temperature carries,
It will not be condensed before condenser, therefore, pyrolysis oil will not be stained with the pipe between reactor wall and reactor and condenser, this
Be advantageous to pyrolysis oil to be collected within collection device as far as possible, improve oil-collecting efficiency, and facilitate experimenter accurately to determine microwave
The yield of pyrolysis oil；
(4) carrier gas temperature is controllable, carrier gas flux change, can be by adjusting transformer output voltage size come regulation resistance silk
Power, so as to adjust the temperature of carrier gas；
(5) experimental provision gas outlet is provided with blower fan, maintains micro-vacuum state in each part and pipeline, as far as possible
Avoid that the accident that the experimenter that burns is revealed in high temperature carrier gas occurs.
In summary, the utility model is simple and feasible, can effectively improve the oil-collecting efficiency of microwave-heating, realize it is more accurate,
More cleaning, the experiment of safer microwave-heating.
Brief description of the drawings
Fig. 1 is that the utility model has carrier gas Hybrid Heating and the microwave-heating apparatus structure schematic diagram of oil collecting function.
Fig. 2 is gas mixer schematic cross-section.
Fig. 3 is carrier gas heater schematic cross-section.
Fig. 4 is spoiler 61 (dividing plate) structural representation.
Embodiment
The utility model is more specifically described in detail with reference to specific embodiment.
Embodiment
As shown in Figures 1 to 4.The utility model discloses a kind of microwave thermal with carrier gas Hybrid Heating and oil collecting function
Device is solved, including such as lower component：
For the gas mixer 5 mixed to the different types of inert gas being passed through；
Carrier gas heater 6；
The quartz reaction kettle 13 for being used to place microwave-heating material being placed in microwave chamber 12；
High-temperature flue gas filter 14；
Condenser 15；
Oil collector sump tank 17；
Blower fan 20；
The gas mixer 5, carrier gas heater 6, quartz reaction kettle 13, high-temperature flue gas filter 14, condenser 15, collection
Pipeline connects successively for oily device 17, blower fan 20；Blower fan 20 is used to make to form negative pressure in pipeline.
The length of gas mixer 5 is with height than being 4:1.
The gas mixer 5 is rectangular box；An air inlet is respectively distributed with four angles of rectangular box；
Gas A passes sequentially through the first needle-valve 1, first gas flowmeter 2 is sent into two adjacent air inlets；
Gas B passes sequentially through the second needle-valve 3, second gas flowmeter 4 is sent into remaining two adjacent air inlets；
Both gases form tangential fluid field in gas mixer 5 and mutually intervolve suction and are threadingly advanced, both gas
Body is passed into carrier gas heater 6 after being sufficiently mixed in gas mixer 5.
The spoiler 61 that polylith is vertically spaced apart is provided with the carrier gas heater 6；It is equal in the positive and negative of spoiler 61
It is scored with " V " type groove；Gas A and gas B after being sufficiently mixed move ahead in the presence of spoiler 61 in serpentine motion.
On pipeline between carrier gas heater 6 and quartz reaction kettle 13 pressure is disposed with according to gas flow direction
Transmitter 8, the first temperature transmitter 9；
On pipeline between oil collector sump tank 17 and blower fan 20 according to gas flow direction be disposed with the 4th needle-valve 18,
Third gas flowmeter 19.
Quartz reaction kettle 13 is placed on electronic balance 21.The length internal diameter ratio in space is 3 in quartz reaction kettle 13:1, ring
The ratio between clevis layer height and internal diameter are 1:5.
The inwall of quartz reaction kettle 13 is pasted with asbestos heat-insulation layer 11；The probe of second temperature transmitter 10 is anti-from quartz
The hole of the top of kettle 13 is answered to stretch into microwave-heating material.
Coiling heater strip in carrier gas heater 6, the gas from carrier gas heater 6 is heated by external transformer 7.Add
Heated filament all-in resistance is 100 Europe.The adjustable voltage output area of transformer 7 is 0-300V, changes the temperature of heater strip with this, realizes and carries
Gas temperature in hot-air heater 6 is adjustable.
The utility model has carrier gas Hybrid Heating and the microwave-heating method of oil collecting function, can be real as follows
It is existing：
Step 1：Before microwave-heating experiment, the lid on the both sides of quartz reaction kettle 13 is opened, microwave-heating material is put into
Behind the centre position of quartz reaction kettle 13, then lid covered again, and connect gas A and gas B carrier gas line；
Step 2：Then second temperature transmitter 10 is put into from the hole above quartz reaction kettle 13, puts in its probe micro-
Behind the centre position of ripple pyrolysis material, the hole is sealed with quartz plug；The shield door of microwave chamber 12 is shut, starts to test；
Step 3：During experiment, the first needle-valve 1, the second needle-valve 3 are first turned on, is passed through or to be passed through gas A in proportion gentle
Body B, gas A and gas B can be passed through from the corner of gas mixer 5, and gas A and gas B form corner in gas mixer 5
Circle of contact flow field simultaneously mutually intervolves suction and is threadingly advanced, and is sufficiently mixed；If need to only be passed through wherein a certain gas, need to only open corresponding
First needle-valve 1 or the second needle-valve 3；At the same time, open the 4th needle-valve 18 and connect and start blower fan 20, make to be formed in each pipeline and bear
Pressure condition, pressure can be read by pressure transmitter 8；
Step 4：After first gas flowmeter 2, second gas flowmeter 4 and the registration of third gas flowmeter 19 are stable,
Cooling water is passed through to condenser 15, is also turned on the power supply of transformer 7, now gas A and gas B are heated to by carrier gas heater 6
More than 250 DEG C (being read by the first temperature transmitter 9), and be passed into quartz reaction kettle 13；
Step 5：After the registration of the first temperature transmitter 9 is stable, microwave power switch is opened, and sets microwave power, will
Microwave-heating material in quartz reaction kettle 13 decomposes；Volatile matter in microwave-heating material can be generated and can coagulated by microwave-heating
Gas and non-condensable gas are tied, because quartz reaction kettle 13 takes asbestos heat-insulation layer 11, quartz reaction kettle 13 to condenser
Insulation material (such as glass fiber tape) is employed on pipeline between 15, quartz reaction kettle 13 and this section of pipeline inner wall face temperature can
More than 250 DEG C of carrier gas temperature is maintained at, therefore condensable gas product caused by microwave-heating passes through the mistake of high-temperature flue gas filter 14
Filter in flue gas and just start to condense into condenser 15 after microparticle；
Step 6：Gaseous product is entered from the upper port of condenser 15, and lower port goes out, and condensable gas can be in condenser 15
Then total condensation is pooled in the oil collector sump tank 17 after condenser 15, incondensable gas is then taken out by blower fan 20 into bio oil
Go out；
During experiment is carried out, first gas flowmeter 2, second gas flowmeter 4, pressure transmitter 8, the first temperature become
Device 9, second temperature transmitter 10, third gas flowmeter 19 and precision electronic balance is sent to detect gas stream everywhere in real time
The quality of microwave-heating material in amount, pressure, temperature and microwave chamber 12, and it is automatically sent to computer preservation.
After the question response time reaches, it is first shut off microwave power switch and transformer 5 switchs, continue to be passed through room temperature carrier gas
With the cooling water of condenser 15, after carrier gas heater 6 and quartz reaction kettle 13 are cooled into room temperature, stopping is passed through gas A, gas
B and cooling water, close blower fan 20；Now, it can be taken off the solid residue after microwave-heating in quartz reaction kettle 13；Open and set
The 3rd needle-valve 16 in the bottom of oil collector sump tank 17, container collection is discharged into by pyrolysis oil.
As described above, it can preferably realize the utility model.
Embodiment of the present utility model is simultaneously not restricted to the described embodiments, and other are any without departing from of the present utility model
Spirit Essence with made under principle change, modification, replacement, combine, simplification, should be equivalent substitute mode, be included in
Within the scope of protection of the utility model.
Claims (7)
1. a kind of microwave-heating device with carrier gas Hybrid Heating and oil collecting function, it is characterised in that including such as lower component：
For the gas mixer (5) mixed to the different types of inert gas being passed through；
Carrier gas heater (6)；
The quartz reaction kettle (13) for being used to place microwave-heating material being placed in microwave chamber (12)；
High-temperature flue gas filter (14)；
Condenser (15)；
Oil collector sump tank (17)；
Blower fan (20)；
The gas mixer (5), carrier gas heater (6), quartz reaction kettle (13), high-temperature flue gas filter (14), condenser
(15), pipeline connects successively for oil collector sump tank (17), blower fan (20)；Blower fan (20) is used to make to form negative pressure in pipeline.
2. there is the microwave-heating device of carrier gas Hybrid Heating and oil collecting function according to claim 1, it is characterised in that：Institute
It is rectangular box to state gas mixer (5)；An air inlet is respectively distributed with four angles of rectangular box；
Gas A passes sequentially through the first needle-valve (1), first gas flowmeter (2) is sent into two adjacent air inlets；
Gas B passes sequentially through the second needle-valve (3), second gas flowmeter (4) is sent into remaining two adjacent air inlets；
Both gases form tangential fluid field in gas mixer (5) and mutually intervolve suction and are threadingly advanced, both gases
Carrier gas heater (6) is passed into after being sufficiently mixed in gas mixer (5).
3. there is the microwave-heating device of carrier gas Hybrid Heating and oil collecting function according to claim 2, it is characterised in that：Institute
State in carrier gas heater (6) and be provided with the spoiler that polylith is vertically spaced apart；" V " type ditch is scored with spoiler positive and negative
Groove；Gas A and gas B after being sufficiently mixed move ahead in the presence of spoiler in serpentine motion.
4. there is the microwave-heating device of carrier gas Hybrid Heating and oil collecting function according to claim 3, it is characterised in that：
On pipeline between carrier gas heater (6) and quartz reaction kettle (13) pressure transmitter is disposed with according to gas flow direction
(8), the first temperature transmitter (9)；
On pipeline between oil collector sump tank (17) and blower fan (20) the 4th needle-valve is disposed with according to gas flow direction
(18), third gas flowmeter (19).
5. there is the microwave-heating device of carrier gas Hybrid Heating and oil collecting function according to claim 4, it is characterised in that：Stone
English reactor (13) is placed on electronic balance (21).
6. there is the microwave-heating device of carrier gas Hybrid Heating and oil collecting function according to claim 5, it is characterised in that：Stone
The inwall of English reactor (13) is pasted with asbestos heat-insulation layer (11)；By the probe of second temperature transmitter (10) from quartz reaction kettle
(13) hole above is stretched into microwave-heating material.
7. there is the microwave-heating device of carrier gas Hybrid Heating and oil collecting function according to claim 6, it is characterised in that：Carry
Coiling heater strip in hot-air heater (6), the gas from carrier gas heater (6) is heated by external transformer 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720556156.7U CN206828451U (en) | 2017-05-18 | 2017-05-18 | A kind of microwave-heating device with carrier gas Hybrid Heating and oil collecting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720556156.7U CN206828451U (en) | 2017-05-18 | 2017-05-18 | A kind of microwave-heating device with carrier gas Hybrid Heating and oil collecting function |
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| Publication Number | Publication Date |
|---|---|
| CN206828451U true CN206828451U (en) | 2018-01-02 |
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ID=60771038
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720556156.7U Expired - Fee Related CN206828451U (en) | 2017-05-18 | 2017-05-18 | A kind of microwave-heating device with carrier gas Hybrid Heating and oil collecting function |
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| CN (1) | CN206828451U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107099313A (en) * | 2017-05-18 | 2017-08-29 | 华南理工大学 | A kind of microwave-heating apparatus and method with carrier gas Hybrid Heating and oil collecting function |
| CN108829156A (en) * | 2018-06-08 | 2018-11-16 | 国宏中晶（北京）科技发展有限公司 | A kind of mixed carrier gas control device and method of waste tire cracking |
| CN112229946A (en) * | 2020-08-18 | 2021-01-15 | 华电电力科学研究院有限公司 | Intelligent SO3Standard gas preparation method and system |
-
2017
- 2017-05-18 CN CN201720556156.7U patent/CN206828451U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107099313A (en) * | 2017-05-18 | 2017-08-29 | 华南理工大学 | A kind of microwave-heating apparatus and method with carrier gas Hybrid Heating and oil collecting function |
| CN108829156A (en) * | 2018-06-08 | 2018-11-16 | 国宏中晶（北京）科技发展有限公司 | A kind of mixed carrier gas control device and method of waste tire cracking |
| CN108829156B (en) * | 2018-06-08 | 2021-02-23 | 国宏中晶集团有限公司 | Mixed carrier gas control device and method for waste tire cracking |
| CN112229946A (en) * | 2020-08-18 | 2021-01-15 | 华电电力科学研究院有限公司 | Intelligent SO3Standard gas preparation method and system |
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Granted publication date: 20180102 Termination date: 20200518 |