CN109628124A - A kind of coal tar dehydration equipment - Google Patents
A kind of coal tar dehydration equipment Download PDFInfo
- Publication number
- CN109628124A CN109628124A CN201910064761.6A CN201910064761A CN109628124A CN 109628124 A CN109628124 A CN 109628124A CN 201910064761 A CN201910064761 A CN 201910064761A CN 109628124 A CN109628124 A CN 109628124A
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- China
- Prior art keywords
- coal tar
- bucket
- blender
- dehydration equipment
- air
- 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.)
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- 239000011280 coal tar Substances 0.000 title claims abstract description 75
- 230000018044 dehydration Effects 0.000 title claims abstract description 28
- 238000006297 dehydration reaction Methods 0.000 title claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 62
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000002156 mixing Methods 0.000 claims description 30
- 239000007788 liquid Substances 0.000 claims description 28
- 238000000926 separation method Methods 0.000 claims description 10
- 238000012856 packing Methods 0.000 claims description 9
- 238000012545 processing Methods 0.000 abstract description 5
- 230000005484 gravity Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 239000003245 coal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C1/00—Working-up tar
- C10C1/02—Removal of water
Abstract
The embodiment of the invention discloses a kind of coal tar dehydration equipments, it is related to coal tar deep processing technical field, its technical solution includes blender, heating device, air-dissolving apparatus, the separator set gradually along coal tar flow direction, is connected with charging line between the blender and heating device, between heating device and air-dissolving apparatus and between air-dissolving apparatus and separator；Coal tar dehydration equipment further includes the compressed air feedway connecting with blender, the feeding device connecting with blender and the steam provisioning component connecting with the heating device.To solve the problems, such as in the prior art due to coal tar be dehydrated it is insufficient caused by water content of coal tar it is not up to standard.
Description
Technical field
The present embodiments relate to coal tar deep processing technical fields, and in particular to a kind of coal tar dehydration equipment.
Background technique
The viscous liquid of a kind of black or dark brown that coal tar is coal to be obtained through destructive distillation.The composition of coal tar is very rich
Richness, wherein the type of hydrocarbon is up to up to ten thousand kinds, therefore becomes a kind of important source material of coal chemical industry.
A large amount of water is usually contained in coal tar, this, which utilizes the following process of coal tar, has very detrimental effect.
Therefore it before coal tar carries out following process, needs to remove in water therein.However, the water and oil in coal tar form oil packet
Water, oil-in-water emulsified state, this causes the removal of coal tar W/O extremely difficult.
It is generally mixed by using demulsifier with coal tar, breaks this emulsification system, then coal is removed by separating treatment
The water of tar.Most coal tar specific gravity are greater than the specific gravity of water, or close to the specific gravity of water, therefore in coal tar deep processing
In the process, it is difficult to separate in coal tar and water, current coal tar that can be big by specific gravity difference by the way of standing sedimentation
Oil and water are separated.But small to specific gravity difference can not just separate, and seriously increase the difficulty of processing of coal tar.
The coal tar produced on coal chemical engineering equipment at present is all aqueous 1.5% or more, general above 5% or more.However
The deep processing of coal tar generally requires coal tar is aqueous to be lower than 0.5%, to be also lower than 1% at least.But due to the overwhelming majority
Coal tar specific gravity be greater than or close to water specific gravity, therefore be difficult to separate, it is general using deviating from as far as possible by the way of standing in production
After most of water, enters in device be heated to 180 degrees Celsius or more reluctantly, allow water vapor, thus realize the dehydration of coal tar, but
It is that energy consumption is very big.
Summary of the invention
For this purpose, the embodiment of the present invention provides a kind of coal tar dehydration equipment, to solve in the prior art since coal tar is de-
Water content of coal tar problem not up to standard caused by water is insufficient.
To achieve the goals above, embodiments of the present invention provide the following technical solutions:
In embodiments of the present invention, provide a kind of coal tar dehydration equipment, including along coal tar flow direction according to
Blender, heating device, air-dissolving apparatus, the separator of secondary setting, between the blender and heating device, heating device and
Charging line is connected between air-dissolving apparatus and between air-dissolving apparatus and separator；Coal tar dehydration equipment further include with
It the compressed air feedway of blender connection, the feeding device that is connect with blender and is connect with the heating device
Steam provisioning component.
Preferably, the blender includes mixing tank, the paddle being set to inside mixing tank and the drive stirring
The batch mixing motor of leaf rotation；One end of the mixing tank is provided with two feed inlets, including first charging aperture and second charging aperture,
The first charging aperture is connected to compressed air feedway, and the second charging aperture is connected to feeding device；In the mixing
The other end of bucket is provided with discharge port, and the discharge port is connect with charging line.
Preferably, the compressed air feedway includes air compressor and is connected to air compressor and mixing
Drier between device.
Preferably, the feeding device includes that feeding pipeline, the water pump being arranged on feeding pipeline and setting are being fed
Check valve on pipeline and between the water pump and blender.
Preferably, the heating device includes the first heating sheet for heating bucket, being arranged in the heating bucket；Steam supply
Component includes steam generator, is connected to steam generator and heats the jet chimney between bucket and be arranged in jet chimney
On control valve.
Preferably, between the blender and heating device, between heating device and air-dissolving apparatus and air-dissolving apparatus and
The Ball valve of pipeline that control charging line connection or disconnected is respectively arranged on the charging line connected between separator.
Preferably, the air-dissolving apparatus includes molten gas bucket, the packing auger blade being arranged in molten gas bucket, is arranged in the molten gas
In bucket and it is located at the second heating sheet of the packing auger blade surrounding and drives the driving motor of the packing auger blade rotation.
Preferably, the separator includes standing bucket, the side connection charging line for standing bucket, the standing bucket
Lower end be connected with oil liquid discharge pipe, be provided with oil outlet pump on the oil liquid discharge pipe；In the upper end for standing bucket
It is connected with outlet pipe.
Preferably, secondary separation component, secondary separation component are connected with far from the side for standing bucket in the outlet pipe
Including filter vat and the filter screen being filtered in the filter vat to oil liquid is set, the lower end connection of the filter vat
There is oil returning tube, the side of oil returning tube is provided with exhaust pipe in the filter screen；The outlet pipe and filter vat connect
Logical position is located at side of the filter screen far from exhaust pipe；The oil returning tube is connected to oil liquid discharge pipe, in the oil return
The first control ball valve is provided on pipeline；The second control ball valve, second control are provided on the oil liquid discharge pipe
Ball valve is arranged in oil returning tube and oil liquid discharge pipe tie point position and stands on the pipeline section between bucket.
Preferably, third heating sheet is respectively arranged in the standing bucket and filter vat.
Embodiment according to the present invention has the advantages that
1, the embodiment of the present invention is dehydrated by the compressed air feedway and steam provisioning component of setting to coal tar
When, compressed air feedway provides dry compressed air, the principle of partial pressure is saturated in air using water, in heating process
The middle moisture by coal tar is vaporized into air, so that the moisture in coal tar be detached, which can be more simple
Clean sufficiently, quickly removes the moisture in coal tar, thus, thoroughly solve the problems, such as that coal tar dehydration is difficult.
2, the embodiment of the present invention is used to separate coal tar oil vapour by the separator of setting, during the separation process, holds
It is continuous that coal tar is heated, thus, so that the temperature of coal tar is keeping higher temperature, thus, in coal tar and steam point
From when, steam will not cool down condensation again.
Detailed description of the invention
It, below will be to embodiment party in order to illustrate more clearly of embodiments of the present invention or technical solution in the prior art
Formula or attached drawing needed to be used in the description of the prior art are briefly described.It should be evident that the accompanying drawings in the following description is only
It is merely exemplary, it for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer, which is extended, obtains other implementation attached drawings.
Structure depicted in this specification, ratio, size etc., only to cooperate the revealed content of specification, for
Those skilled in the art understands and reads, and is not intended to limit the invention enforceable qualifications, therefore does not have technical
Essential meaning, the modification of any structure, the change of proportionate relationship or the adjustment of size are not influencing the function of the invention that can be generated
Under effect and the purpose that can reach, should all still it fall in the range of disclosed technology contents obtain and can cover.
Fig. 1 is a kind of overall structure diagram of coal tar dehydration equipment provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram of prominent blender in coal tar dehydration equipment provided in an embodiment of the present invention；
Fig. 3 is the schematic diagram of prominent heating device in coal tar dehydration equipment provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of prominent air-dissolving apparatus in coal tar dehydration equipment provided in an embodiment of the present invention；
Fig. 5 is the schematic diagram of prominent separator in coal tar dehydration equipment provided in an embodiment of the present invention.
In figure: 1, blender；11, mixing tank；111, feed inlet；1111, first charging aperture；1112, second charging aperture；
112, discharge port；12, paddle；13, batch mixing motor；2, compressed air feedway；21, air compressor；22, drier；
23, control switch；3, feeding device；31, feeding pipeline；32, water pump；33, check valve；4, heating device；41, bucket is heated；42,
First heating sheet；43, temperature sensor；5, steam provisioning component；51, steam generator；52, control valve；53, jet chimney；
6, air-dissolving apparatus；61, molten gas bucket；62, packing auger blade；63, driving motor；64, the second heating sheet；7, separator；71, it stands
Bucket；72, oil liquid discharge pipe；721, the second control ball valve；73, oil outlet pump；74, outlet pipe；75, secondary separation component；
751, filter vat；752, filter screen；753, oil returning tube；754, exhaust pipe；755, the first control ball valve；76, third heating sheet；
8, charging line；81, Ball valve of pipeline.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book is understood other advantages and efficacy of the present invention easily, it is clear that described embodiment is the present invention one
Section Example, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
The term of cited such as "upper", "lower", "left", "right", " centre ", is merely convenient to describe in this specification
Be illustrated, rather than to limit the scope of the invention, relativeness is altered or modified, and is changing technology without essence
It inside holds, when being also considered as the enforceable scope of the present invention.
A kind of coal tar dehydration equipment, as shown in Figure 1, including the blender 1, heating device 4, molten that coal tar successively passes through
Device of air 6, separator 7, between blender 1 and heating device 4, between heating device 4 and air-dissolving apparatus 6 and molten gas dress
It sets and is connected with charging line 8 between 6 and separator 7；It when in use, meanwhile, further include the compressed air being connect with blender 1
Feedway 2, the feeding device 3 being connect with blender 1 and the steam provisioning component 5 being connect with heating device 4.It is using
When, material is provided into blender 1 by the feeding device 3 of setting, at the same time, passes through the compressed air feedway of setting
2 are added compressed gas into blender 1, after being sufficiently mixed, are sent at heating device 4 in gas liquid mixture, pass through setting
Steam provisioning component 5 feed hot steam into heating device 4, while internal gas liquid mixture is heated, after heating,
It is sent at air-dissolving apparatus 6, the moisture in air-dissolving apparatus 6 in coal tar further separates, finally the gas-liquid at separator 7
Separation.
In order to facilitate the time of control coal tar in each of the steps, between blender 1 and heating device 4, heating
It is respectively arranged on the charging line 8 connected between device 4 and air-dissolving apparatus 6 and between air-dissolving apparatus 6 and separator 7
The Ball valve of pipeline 81 for controlling the connection of charging line 8 or disconnecting.
As shown in Fig. 2, blender 1 can be uniform for cylindrical blender 1 or infundibulate blender 1, do not limit herein
It is fixed.Blender 1 includes mixing tank 11, the paddle 12 being arranged in inside mixing tank 11 and 11 upper end of mixing tank is arranged in
Batch mixing motor 13 drives the material of 12 pairs of inside of paddle to be stirred by the batch mixing motor 13 of setting when in use, thus
So that material is sufficiently mixed.Feed inlet 111 there are two opening up in the upper end of mixing tank 11, respectively includes 1111 He of first charging aperture
Second charging aperture 1112, wherein first charging aperture 1111 is connected to compressed air feedway 2, and the connection of second charging aperture 1112 supplies
Expect device 3, the other end of mixing tank 11 is provided with discharge port 112, discharge port 112 connects charging line 8.
Compressed air feedway 2 includes air compressor 21 and is connected between air compressor 21 and blender 1
Drier 22, connected between air compressor 21, blender 1 and mixing tank 11 by pipeline, and in drier 22 and mixing
The control switch 23 of air gas on-off is provided on pipeline between bucket 11.By the air compressor 21 of setting to air into
Row compression, and depth drying is carried out to the moisture in compressed air by using drier 22.To discharge into mixing tank 11
Gas be dry gas.
Feeding device 3 includes feeding pipeline 31 and the water pump 32 that is arranged on feeding pipeline 31, will be for by water pump 32
Material in pipe material 31 is added in mixing tank 11.Further, on feeding pipeline 31 and positioned at water pump 32 and mixing tank 11
Between pipeline section on be provided with check valve 33, thus, so that coal tar has been merely able to 32 side of water pump and has arranged into mixing tank 11,
The risk for preventing coal tar from flowing backwards to a certain extent, so that being able to maintain certain pressure in mixing tank 11.
With the above arrangement, during being stirred to 11 inside coal tar of mixing tank, since the compressed air of addition is
Dry air can make the moisture in coal tar tentatively be vaporized, and enter heating device 4 later.
As shown in figure 3, the lower section of mixing tank 11 is arranged in heating device 4, thus, when gas liquid mixture is in mixing tank 11
When stirring abundant, it can be directly discharged in heating device 4 with opening conduits ball valve 81.
Heating device 4 includes heating bucket 41, the first heating sheet 42 heated in bucket 41 is arranged in.Steam provisioning component 5 wraps
It includes steam generator 51, the jet chimney being arranged between steam generator 51 and heating unit 53 and is arranged in steam pipe
Control valve 52 on road 53.At the same time, the temperature of the first heating sheet 42 of control switch or open circuit is provided in heating bucket 41
Sensor 43 is spent, when 43 temperature sensor of temperature sensor is between 180 DEG C to 200 DEG C, stops heat supply, later by material transmission
To air-dissolving apparatus 6.
As shown in figure 4, air-dissolving apparatus 6 is arranged below heating device 4, including molten gas bucket 61, setting are in molten gas bucket 61
Packing auger blade 62, be arranged on molten gas bucket 61 and for drive packing auger blade 62 rotate driving motor 63 and setting exist
In molten gas bucket 61 and the second heating sheet 64 for being located at around packing auger blade 62.It can be to gas-liquid by the second heating sheet 64 of setting
Mixture carries out continuous heating, prevents its cooling steam from liquefying.Meanwhile by stirring, enable vapor in coal tar
Preferably it is evaporated.
By blasting dry compressed air, hot steam being added later, it is saturated the principle of partial pressure in air using water, incites somebody to action
Moisture in coal tar is vaporized into air, so that moisture be deviate from from coal tar.
As shown in figure 5, separator 7 is set as the position parallel with air-dissolving apparatus 6 comprising stand bucket 71, stand bucket
71 side is connected to charging line 8, oil liquid discharge pipe 72 is connected in the lower end for standing bucket 71, on oil liquid discharge pipe 72
It is provided with oil outlet pump 73, periodically oil liquid can be discharged by oil outlet pump 73.
Outlet pipe 74 is connected in the upper end for standing bucket 71.It is connected in outlet pipe 74 far from the side for standing bucket 71
Secondary separation component 75, secondary separation component 75 include that filter vat 751 and setting carried out oil liquid in filter vat 751
The filter screen 752 of filter, the lower end of filter vat 751 are connected with oil returning tube 753, filter screen 752 far from oil returning tube 753 one
Side is provided with exhaust pipe 754；The position that outlet pipe 74 is connected to filter vat 751 is located at filter screen 752 far from exhaust pipe 754
Side；By secondary filter, the coal tar oil particles carried in gas can be filtered.
Oil returning tube 753 is connected to oil liquid discharge pipe 72, and the first control ball valve 755 is provided on oil returning tube 753；
The second control ball valve 721 is provided on oil liquid discharge pipe 72, the second control setting of ball valve 721 is in oil returning tube 753 and oil
On pipeline section between 72 tie point position of liquid discharge pipe and standing bucket 71.By the setting, coal tar oil extraction can be carried out
Control, the two, which is realized, to work independently.
In use, in order to prevent in gas-liquid separation, when vapor-liquid temperature is lower, steam liquefies again, is standing
It is respectively arranged with third heating sheet 76 in bucket 71 and filter vat 751, passes through mistake in 76 pairs of standing buckets 71 of third heating sheet of setting
Coal tar is heated in lauter tub 751, so that it is kept higher temperature, is generally higher than the first heating sheet 42 and the second heating sheet 64
Heating temperature.
Although above having used general explanation and specific embodiment, the present invention is described in detail, at this
On the basis of invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Therefore,
These modifications or improvements without departing from theon the basis of the spirit of the present invention are fallen within the scope of the claimed invention.
Claims (10)
1. a kind of coal tar dehydration equipment, it is characterised in that: coal tar dehydration equipment includes successively setting along coal tar flow direction
Blender (1), heating device (4), air-dissolving apparatus (6), the separator (7) set, the blender (1) and heating device (4)
Between, be connected with feeding between heating device (4) and air-dissolving apparatus (6) and between air-dissolving apparatus (6) and separator (7)
Pipeline (8)；
The coal tar dehydration equipment further includes the compressed air feedway (2) connecting with blender (1) and blender (1)
The feeding device (3) of connection and the steam provisioning component (5) being connect with the heating device (4).
2. coal tar dehydration equipment according to claim 1, it is characterised in that: the blender (1) includes mixing tank
(11), it is set to the internal paddle (12) of mixing tank (11) and drives the batch mixing motor of paddle (12) rotation
(13)；
It is provided with two feed inlets (111) in one end of the mixing tank (11), including first charging aperture (1111) and the second charging
Mouthful (1112), the first charging aperture (1111) are connected to compressed air feedway (2), the second charging aperture (1112) and
Feeding device (3) connection；
It is provided with discharge port (112) in the other end of the mixing tank (11), the discharge port (112) and charging line (8) are even
It connects.
3. coal tar dehydration equipment according to claim 1, it is characterised in that: compressed air feedway (2) packet
The drier (22) for including air compressor (21) and being connected between air compressor (21) and blender (1).
4. coal tar dehydration equipment according to claim 1, it is characterised in that: the feeding device (3) includes feeder sleeve
Road (31), setting are in the water pump (32) on feeding pipeline (31) and are arranged on feeding pipeline (31) and are located at the water pump
(32) check valve (33) between blender (1).
5. coal tar dehydration equipment according to claim 2, it is characterised in that: the heating device (4) includes heating bucket
(41), the first heating sheet (42) in heating bucket (41) is set；
Steam provisioning component (5) includes steam generator (51), is connected between steam generator (51) and heating bucket (41)
Jet chimney (53) and the control valve (52) being arranged on jet chimney (53).
6. coal tar dehydration equipment according to claim 1, it is characterised in that: the blender (1) and heating device (4)
Between, the feeding that connects between heating device (4) and air-dissolving apparatus (6) and between air-dissolving apparatus (6) and separator (7)
The Ball valve of pipeline (81) for being respectively arranged with control charging line (8) connection on pipeline (8) or disconnecting.
7. coal tar dehydration equipment according to claim 1, it is characterised in that: the air-dissolving apparatus (6) includes molten gas bucket
(61), packing auger blade (62) in molten gas bucket (61), setting are set in the molten gas bucket (61) and are located at the auger leaf
Second heating sheet (64) of piece (62) surrounding and the driving motor (63) for driving packing auger blade (62) rotation.
8. coal tar dehydration equipment according to claim 1, it is characterised in that: the separator (7) includes standing bucket
(71), the side for standing bucket (71) is connected to charging line (8), and the lower end for standing bucket (71) is connected with oil liquid discharge nozzle
Road (72) is provided with oil outlet pump (73) on the oil liquid discharge pipe (72)；
Outlet pipe (74) are connected in the upper end for standing bucket (71).
9. coal tar dehydration equipment according to claim 8, it is characterised in that: in the outlet pipe (74) far from standing
The side of bucket (71) is connected with secondary separation component (75), and secondary separation component (75) includes that filter vat (751) and setting exist
The filter screen (752) being filtered in the filter vat (751) to oil liquid, the lower end of the filter vat (751) is connected with oil return
Pipeline (753) is provided with exhaust pipe (754) far from the side of oil returning tube (753) in the filter screen (752)；The outlet
The position that pipeline (74) is connected to filter vat (751) is located at the side of filter screen (752) far from exhaust pipe (754)；
The oil returning tube (753) is connected to oil liquid discharge pipe (72), is provided with the first control on the oil returning tube (753)
Ball valve (755) processed；The second control ball valve (721), the second control ball valve are provided on the oil liquid discharge pipe (72)
(721) it is arranged on the pipeline section between oil returning tube (753) and oil liquid discharge pipe (72) tie point position and standing bucket (71).
10. coal tar dehydration equipment according to claim 9, it is characterised in that: in the standing bucket (71) and filter vat
(751) third heating sheet (76) are respectively arranged in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910064761.6A CN109628124B (en) | 2019-01-23 | 2019-01-23 | Coal tar dewatering equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910064761.6A CN109628124B (en) | 2019-01-23 | 2019-01-23 | Coal tar dewatering equipment |
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| Publication Number | Publication Date |
|---|---|
| CN109628124A true CN109628124A (en) | 2019-04-16 |
| CN109628124B CN109628124B (en) | 2023-11-03 |
Family
ID=66063312
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910064761.6A Active CN109628124B (en) | 2019-01-23 | 2019-01-23 | Coal tar dewatering equipment |
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|---|---|
| CN109628124B (en) | 2023-11-03 |
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