CN208532694U - A kind of residual neat recovering system for coal tar oil processing - Google Patents
A kind of residual neat recovering system for coal tar oil processing Download PDFInfo
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- CN208532694U CN208532694U CN201820648766.4U CN201820648766U CN208532694U CN 208532694 U CN208532694 U CN 208532694U CN 201820648766 U CN201820648766 U CN 201820648766U CN 208532694 U CN208532694 U CN 208532694U
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- kettle
- heavy oil
- oil
- coal tar
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The utility model belongs to chemical field, especially a kind of residual neat recovering system for coal tar oil processing, include: incinerator for from pretreatment tank, filter, stand exhaust gas that kettle, heavy oil dehydrating kettle and light oil dehydrating kettle generate and waste liquid carries out burning disposal, while the high-temperature tail gas generated will be burned and be passed through pretreatment tank, filter, stand kettle, heavy oil dehydrating kettle and light oil dehydrating kettle coal tar therein is heated.The residual neat recovering system of coal tar oil processing provided by the utility model; heavy oil dehydrating kettle and light oil dehydrating kettle are introduced into using high-temperature tail gas; the medium temperature tail gas being discharged from heavy oil dehydrating kettle and light oil dehydrating kettle enters pretreatment tank, filter and stands kettle; last low temperature exhaust gas is discharged into atmosphere by exhaust gas cleaner purification; according to the difference of distinct device demand heat; tail gas layering utilizes step by step; heat utilization is abundant; coal tar oil treatment equipment is heated without additional energy source, disposal of pollutants is reduced and protects environment.
Description
Technical field
The utility model belongs to chemical field, especially a kind of residual neat recovering system for coal tar oil processing.
Background technique
China is the country of oil starvation, few gas, relatively rich coal, and is big coal country, recently as the development of coal chemical industry, is made
Yield for byproduct coal tar also rises year by year, and at present in coal tar, the high temperature tar from coking accounts for 80%, and 20% comes from
Gas generator and coke making by indigenous methods, belong to low temperature tar.Falling sharply with petroleum resources simultaneously, so that the processing and utilization of coal tar
It is increasingly subject to the attention of country.Coal tar is coal liquid by-product obtained in pyrolytic process.It is higher for utility value
Middle coalite tar for its mainly contain aliphatic compound, compound fragrant hydrocarbon and phenolic compound etc..Wherein
Aliphatic compound is the important component of the fuel oil such as gasoline, diesel oil, is plus hydrogen produces the excellent of high cetane number diesel oil
Good raw material；Compound fragrant hydrocarbon has petrochemical industry that cannot obtain or cannot the high added values such as economy obtained naphthalene, anthracene, phenanthrene and pyrene
Fine chemicals；Phenolic compound is important industrial chemicals, in synthetic fibers, engineering plastics, pesticide, medicine, preservative, increasing
Modeling agent, fragrance and dyestuff intermediate etc. have extensive purposes, belong to high added value fine chemical product.Therefore it is how high
Effect, economic, environmental protection separation coal tar have seemed particularly significant.It is either still sufficiently sharp from resource from the angle of protection environment
Angle recycles the coal tar in coal tar greasy filth sufficiently it is necessary to effectively be handled coal tar greasy filth to improve
Economic benefit simultaneously protects environment, achievees the purpose that two-win.
Coal tar during recovery processing, pretreatment stage, stand the stage of reaction can all generate a large amount of exhaust gas and
Waste liquid, there are also can also filter out many waste liquids in plant area's sewage disposal process, exhaust gas and waste liquid cannot be directly discharged to the Nature
In, it needs after the organic matter for removing the overwhelming majority, to form the solid waste of volume very little by burning, it is next in progress
The landfill of step or other processing modes reduce pollution.Simultaneously because the characteristic that coal tar itself oil content is big, in low temperature environment
Under can solidify lead to not flow and handle, this requires in the whole production line of coal tar oil processing, be intended to guarantee equipment temperature
Degree is just able to maintain the mobility of coal tar at 50 ~ 60 DEG C, this just needs a large amount of heating device, how to utilize exhaust gas and waste liquid
Equipment is heated, this just needs a whole set of residual neat recovering system.
Utility model content
The utility model is that the exhaust gas for solving how to be generated during processing using recycling coal tar and waste liquid are being burned
The problem of heat generated in the process, provides a kind of residual neat recovering system for coal tar oil processing, using waste heat to coal tar
Processing equipment is heated.
The utility model is to solve the above problems, the technical solution used are as follows: a kind of waste heat for coal tar oil processing time
Receipts system includes:
Pretreatment tank with function of recovering waste heat enables coal tar well cuts to sink for demulsifier and flocculant to be added
Drop；
Filter with function of recovering waste heat keeps solid miscellaneous for being filtered to the coal tar from pretreatment tank
Matter separation；
Standing kettle with function of recovering waste heat, for in the coal tar of filter be added light oil release agent, and
Standing is that coal tar is divided into two layers, and upper layer is that light oil lower layer is heavy oil；
Heavy oil dehydrating kettle with function of recovering waste heat, for from stand kettle lower layer heavy oil heat, make water and
A small amount of light oil volatilization, dewatered heavy oil enter heavy oil storage tank storage；
Condensing unit and light oil dehydrating kettle with function of recovering waste heat, condensing unit volatilize to heating in heavy oil dehydrating kettle
Water and a small amount of light oil out carries out condensing recovery, and the liquid of recycling enters light oil dehydrating kettle and carries out water-oil separating, isolates
Light oil enters the storage of light oil storage tank；
Heavy oil storage tank stores the heavy oil from heavy oil dehydrating kettle；
Light oil storage tank, for being stored from the light oil for standing kettle upper layer and light oil dehydrating kettle；
Incinerator, it is useless for being generated from pretreatment tank, filter, standing kettle, heavy oil dehydrating kettle and light oil dehydrating kettle
Gas and waste liquid carry out burning disposal, while will burn the high-temperature tail gas generated and being passed through pretreatment tank, filter, stand kettle, heavy oil
Dehydrating kettle and light oil dehydrating kettle heat coal tar therein；
Exhaust gas cleaner is discharged into atmosphere to after waste heat low temperature exhaust gas after the recovery carries out purified treatment.
Further, the high-temperature tail gas of incinerator discharge is introduced into heavy oil dehydrating kettle and light oil dehydrating kettle, is dehydrated from heavy oil
Kettle and the medium temperature tail gas of light oil dehydrating kettle discharge enter pretreatment tank, filter and stand kettle, pretreatment tank, filter and standing
The low temperature exhaust gas of kettle discharge is discharged into atmosphere by exhaust gas cleaner purification.
Further, pretreatment tank includes tank body and tank body upper end is provided with pretreatment tank feed inlet and pretreatment tank exhaust
Mouthful, pretreatment tank exhaust outlet is connect with incinerator is discharged into exhaust gas, and lower end is provided with pretreatment discharge port and is connected to the filter, tank
It is provided with pretreatment tank heater on body sidewall, pre-processes the pretreatment canister incoming gas mouth and heavy oil dehydrating kettle and light oil of tank heater
Dehydrating kettle connection introduces medium temperature tail gas, and pretreatment tank gas outlet is connect with exhaust gas cleaner.
Further, stand kettle include a cylinder, cylinder upper end be provided with stand kettle feed inlet be connected to the filter and
It stands kettle exhaust outlet to connect with incinerator, bottom surface is provided with standing kettle discharge port and connect with heavy oil dehydrating kettle, is provided in cylinder
The driving device of stirring rod and driving stirring rod rotation with heating function, stirring rod is hollow stem, and upper end is provided with standing
Kettle air inlet is connect with heavy oil dehydrating kettle and light oil dehydrating kettle introduces medium temperature tail gas gas, and stands kettle gas outlet and tail gas clean-up
Device connection.
Further, heavy oil dehydrating kettle includes heavy oil autoclave body, and heavy oil feed mouth is provided on heavy oil autoclave body and stands kettle company
It connects with heavy oil exhaust outlet with incinerator and connect, bottom surface is provided with heavy oil discharge port and connect with heavy oil storage tank, and top is provided with oil gas
Outlet is connect with condensing unit, and heavy fuel heater, the heavy oil air inlet and incinerator of heavy fuel heater are provided in heavy oil autoclave body
Connection introduces high-temperature tail gas, and heavy oil gas outlet and pretreatment tank, filter and standing kettle are connected as its and provide medium temperature tail gas.
The residual neat recovering system for having the technical effect that coal tar oil processing provided by the utility model of the utility model,
Pretreatment stage, the standing stage of reaction can all generate a large amount of exhaust gas and waste liquid is sent into incinerator and is burned, the high temperature of generation
Tail gas is introduced into heavy oil dehydrating kettle and light oil dehydrating kettle, and the medium temperature tail gas being discharged from heavy oil dehydrating kettle and light oil dehydrating kettle enters pre-
The low temperature exhaust gas of process tank, filter and standing kettle, pretreatment tank, filter and standing kettle discharge is net by exhaust gas cleaner
Change is discharged into atmosphere, and according to the difference of distinct device demand heat, tail gas layering utilizes step by step, and heat utilization is abundant, does not have to additional
The energy heats coal tar oil treatment equipment, reduces disposal of pollutants and protects environment.
Detailed description of the invention
Fig. 1 is the schematic diagram of the utility model；
Fig. 2 is the main view of the utility model pretreatment tank；
Fig. 3 is the main view that the utility model stands kettle；
Fig. 4 is the main view of the utility model heavy oil dehydrating kettle.
Appended drawing reference: 1- pretreatment tank, 101- tank body, 102- pre-process tank feed inlet, 103- pre-processes tank exhaust outlet,
104- pre-processes tank discharge port, 105- pre-processes tank heater, 106- pretreatment canister incoming gas mouth, 107- pre-process tank gas outlet,
2- filter, 3- stand kettle, 301- cylinder, 302- and stand kettle feed inlet, 303- standing kettle exhaust outlet, 304- standing kettle discharging
Mouth, 305- stirring rod, 306- driving device, 307- standing kettle air inlet, 308- standing kettle gas outlet, 4- heavy oil storage tank, 5- are light
Oil tank, 6- heavy oil dehydrating kettle, 601- heavy oil autoclave body, 602- heavy oil feed mouth, 603- heavy oil exhaust outlet, the discharging of 604- heavy oil
Mouth, 605- oil gas vent, 606- heavy fuel heater, 607- heavy oil air inlet, 608- heavy oil gas outlet, 7- coagulate device, 8- light oil
Dehydrating kettle, 9- incinerator, 10- exhaust gas cleaner.
Specific embodiment
Further specific detailed description is done to the utility model with reference to the accompanying drawings and detailed description.
As shown in Figure 1, a kind of residual neat recovering system for coal tar oil processing, characterized by comprising:
Pretreatment tank 1 with function of recovering waste heat enables coal tar well cuts for demulsifier and flocculant to be added
Sedimentation；
Filter 2 with function of recovering waste heat makes solid for being filtered to the coal tar from pretreatment tank 1
Impurity separation；
Standing kettle 3 with function of recovering waste heat, for in the coal tar from filter 2 be added light oil release agent,
Standing is divided into coal tar two layers, and upper layer is that light oil lower layer is heavy oil；
Heavy oil dehydrating kettle 6 with function of recovering waste heat makes water for heating from the heavy oil for standing 3 lower layer of kettle
It volatilizees with a small amount of light oil, dewatered heavy oil enters the storage of heavy oil storage tank 4；
Condensing unit 7 and light oil dehydrating kettle 8, condensing unit 7 is to heating the water volatilized and a small amount of in heavy oil dehydrating kettle 6
Light oil carries out condensing recovery, and the liquid of recycling enters light oil dehydrating kettle 8 and carries out water-oil separating, and the light oil isolated enters light oil storage
Tank 5 stores；
Heavy oil storage tank 4 stores the heavy oil from heavy oil dehydrating kettle 6；
Light oil storage tank 5, for being stored from the light oil for standing 3 upper layer of kettle and light oil dehydrating kettle 8；
Incinerator 9, for being produced from pretreatment tank 1, filter 2, standing kettle 3, heavy oil dehydrating kettle 6 and light oil dehydrating kettle 8
Raw exhaust gas and waste liquid carry out burning disposal, while will burn the high-temperature tail gas generated and being passed through pretreatment tank 1, filter 2, stand
Kettle 3, heavy oil dehydrating kettle 6 and light oil dehydrating kettle 8 heat coal tar therein；
Exhaust gas cleaner 10 is discharged into atmosphere to after waste heat low temperature exhaust gas after the recovery carries out purified treatment.
Further, the high-temperature tail gas that incinerator 9 is discharged is introduced into heavy oil dehydrating kettle 6 and light oil dehydrating kettle 8, because of dehydration
Oil is heated to 110 ° by kettle requirement makes internal water boiling to be dehydrated, it is desirable that heating temperature is higher, so first by high-temperature tail gas
It is passed through heavy oil dehydrating kettle 6 and light oil dehydrating kettle 8, from the medium temperature tail gas entrance in advance that heavy oil dehydrating kettle 6 and light oil dehydrating kettle 8 are discharged
It manages tank 1, filter 2 and stands kettle 3, pretreatment tank 1, filter 2 and standing kettle 3 require the coal tar in it to protect at 50 ~ 60 DEG C
Mobility is held, heating temperature is lower, medium temperature tail gas, pretreatment tank 1, filter 2 and the low temperature tail for standing the discharge of kettle 3
Gas is discharged into atmosphere by the purification of exhaust gas cleaner 10.
Further, as shown in Fig. 2, pretreatment tank 1 include tank body 101 and 101 upper end of tank body be provided with pretreatment tank into
Material mouth 102 and pretreatment tank exhaust outlet 103, pretreatment tank exhaust outlet 103 is connect with incinerator 9 is discharged into exhaust gas, lower end setting
There is pretreatment discharge port 104 to connect with filter 2, pretreatment tank heater 105 is provided on 1 side wall of tank body, pretreatment tank adds
The pretreatment canister incoming gas mouth 106 of hot device 105 is connect with heavy oil dehydrating kettle 6 and light oil dehydrating kettle 8 introduces medium temperature tail gas, pretreatment
Tank gas outlet 107 is connect with exhaust gas cleaner 10.
Further, as shown in figure 3, standing kettle 3 includes a cylinder 301,301 upper end of cylinder, which is provided with, stands kettle charging
Mouthfuls 302 connects and stand kettle exhaust outlet 303 with filter 2 connect with incinerator 9, bottom surface be provided with standing kettle discharge port 304 and
Heavy oil dehydrating kettle 6 connects, and the drive that stirring rod 305 and the driving stirring rod 305 with heating function rotate is provided in cylinder 301
Dynamic device 306, stirring rod 305 are hollow stem, and upper end, which is provided with, stands kettle air inlet 307 and heavy oil dehydrating kettle 6 and light oil dehydration
The connection of kettle 8 introduces medium temperature tail gas, and stands kettle gas outlet 308 and connect with exhaust gas cleaner 10.
Further, as shown in figure 4, heavy oil dehydrating kettle 6 includes heavy oil autoclave body 601, heavy oil is provided on heavy oil autoclave body 601
Feed inlet 602 with stand that kettle 3 connect and heavy oil exhaust outlet 603 is connect with incinerator 9, bottom surface be provided with heavy oil discharge port 604 and
Heavy oil storage tank 4 connects, and top is provided with oil gas vent 605 and connect with condensing unit 7, is provided with heavy oil in heavy oil autoclave body 601 and adds
Hot device 606, the heavy oil air inlet 607 of heavy fuel heater 606 is connect with incinerator 9 introduces high-temperature tail gas, heavy oil gas outlet 608
Its is connected as with pretreatment tank 1, filter 2 and standing kettle 3, and medium temperature tail gas is provided.
Light oil dehydrating kettle 8 is no longer described in detail as 6 structure of heavy oil dehydrating kettle.
The residual neat recovering system workflow of the utility model:
Pre-process tank 1, filter 2, stand kettle 3, the exhaust gas that heavy oil dehydrating kettle 6 and light oil dehydrating kettle 8 generate and waste liquid into
Enter incinerator 9 and carry out burning disposal, high-temperature tail gas is introduced into heavy oil dehydrating kettle 6 and light oil dehydrating kettle 8, because dehydrating kettle requirement will
Oil, which is heated to 110 °, makes internal water boiling to be dehydrated, it is desirable that heating temperature is higher, so high-temperature tail gas is first passed through heavy oil
Dehydrating kettle 6 and light oil dehydrating kettle 8, the medium temperature tail gas being discharged from heavy oil dehydrating kettle 6 and light oil dehydrating kettle 8 enter pretreatment tank 1, mistake
Filter 2 and standing kettle 3, pretreatment tank 1, filter 2 and standing kettle 3 require the coal tar in it in 50 ~ 60 DEG C of holding mobility
, heating temperature is lower, medium temperature tail gas, and the low temperature exhaust gas that pretreatment tank 1, filter 2 and standing kettle 3 are discharged passes through tail
The purification of air purifying apparatus 10 is discharged into atmosphere.
Embodiment provided above is the better embodiment of the utility model, only is used to facilitate to illustrate the utility model, and
It is non-to impose any limitation on the present invention, any those of ordinary skill in the art, if not departing from
In the range of the mentioned technical characteristic of the utility model, locally changes or repair using made by the utility model disclosed technology content
The equivalent embodiment of decorations, and without departing from the technical characteristics of the utility model content, still fall within the utility model technical characteristic
In the range of.
Claims (5)
1. a kind of residual neat recovering system for coal tar oil processing, characterized by comprising:
Pretreatment tank (1) with function of recovering waste heat enables coal tar well cuts to sink for demulsifier and flocculant to be added
Drop；
Filter (2) with function of recovering waste heat makes solid impurity for being filtered to the coal tar from pretreatment tank
Separation；
Standing kettle (3) with function of recovering waste heat, for standing to light oil release agent is added in the coal tar of filter
It is divided into coal tar two layers, upper layer is that light oil lower layer is heavy oil；
Heavy oil dehydrating kettle (6) with function of recovering waste heat makes water for heating from the heavy oil for standing kettle (3) lower layer
It volatilizees with a small amount of light oil, dewatered heavy oil enters heavy oil storage tank (4) storage；
Condensing unit (7) and light oil dehydrating kettle (8), condensing unit (7) is to the water that heating volatilizes in heavy oil dehydrating kettle (6) and less
The light oil of amount carries out condensing recovery, and the liquid of recycling enters light oil dehydrating kettle (8) and carries out water-oil separating, and the light oil isolated enters
Light oil storage tank (5) storage；
Heavy oil storage tank (4) stores the heavy oil from heavy oil dehydrating kettle (6)；
Light oil storage tank (5), for being stored from the light oil for standing kettle (3) upper layer and light oil dehydrating kettle (8)；
Incinerator (9), for being dehydrated from pretreatment tank (1), filter (2), standing kettle (3), heavy oil dehydrating kettle (6) and light oil
The exhaust gas and waste liquid that kettle (8) generates carry out burning disposal, while will burn the high-temperature tail gas generated and being passed through pretreatment tank (1), mistake
Filter (2), standing kettle (3), heavy oil dehydrating kettle (6) and light oil dehydrating kettle (8) heat coal tar therein；
Exhaust gas cleaner (10) is discharged into atmosphere to after waste heat low temperature exhaust gas after the recovery carries out purified treatment.
2. a kind of residual neat recovering system for coal tar oil processing according to claim 1, it is characterised in that: the burning
The high-temperature tail gas of furnace (9) discharge is introduced into heavy oil dehydrating kettle (6) and light oil dehydrating kettle (8), de- from heavy oil dehydrating kettle (6) and light oil
The medium temperature tail gas of water kettle (8) discharge enters pretreatment tank (1), filter (2) and stands kettle (3), pre-processes tank (1), filter
(2) it is purified by exhaust gas cleaner (10) with the low temperature exhaust gas of standing kettle (3) discharge and is discharged into atmosphere.
3. a kind of residual neat recovering system for coal tar oil processing according to claim 2, it is characterised in that: the pre- place
Reason tank (1) includes tank body (101) and tank body (101) upper end is provided with pretreatment tank feed inlet (102) and pretreatment tank exhaust outlet
(103), pretreatment tank exhaust outlet (103) is connect with incinerator (9) is discharged into exhaust gas, and lower end is provided with pretreatment discharge port
(104) it is connect with filter (2), pretreatment tank heater (105) is provided on tank body (101) side wall, pre-process tank heater
(105) pretreatment canister incoming gas mouth (106) connect with heavy oil dehydrating kettle (6) and light oil dehydrating kettle (8) and introduces medium temperature tail gas, in advance
Process tank gas outlet (107) is connect with exhaust gas cleaner (10).
4. a kind of residual neat recovering system for coal tar oil processing according to claim 2, it is characterised in that: the standing
Kettle (3) include a cylinder (301), cylinder (301) upper end be provided with stand kettle feed inlet (302) connect with filter (2) and
It stands kettle exhaust outlet (303) to connect with incinerator (9), bottom surface, which is provided with, stands kettle discharge port (304) and heavy oil dehydrating kettle (6) even
It connects, the stirring rod (305) with heating function and the driving device of driving stirring rod (305) rotation is provided in cylinder (301)
(306), stirring rod (305) is hollow stem, and upper end is provided with standing kettle air inlet (307) and heavy oil dehydrating kettle (6) and light oil is de-
Water kettle (8) connection introduces medium temperature tail gas, and stands kettle gas outlet (308) and connect with exhaust gas cleaner (10).
5. a kind of residual neat recovering system for coal tar oil processing according to claim 2, it is characterised in that: the heavy oil
Dehydrating kettle (6) includes heavy oil autoclave body (601), and heavy oil feed mouth (602) are provided on heavy oil autoclave body (601) and stand kettle (3) even
It connects and is connect with heavy oil exhaust outlet (603) with incinerator (9), bottom surface is provided with heavy oil discharge port (604) and heavy oil storage tank (4) even
It connects, top is provided with oil gas vent (605) and connect with condensing unit (7), is provided with heavy fuel heater in heavy oil autoclave body (601)
(606), the heavy oil air inlet (607) of heavy fuel heater (606) is connect with incinerator (9) introduces high-temperature tail gas, heavy oil outlet
Mouth (608) and pretreatment tank (1), filter (2) and standing kettle (3) are connected as its and provide medium temperature tail gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820648766.4U CN208532694U (en) | 2018-05-03 | 2018-05-03 | A kind of residual neat recovering system for coal tar oil processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820648766.4U CN208532694U (en) | 2018-05-03 | 2018-05-03 | A kind of residual neat recovering system for coal tar oil processing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208532694U true CN208532694U (en) | 2019-02-22 |
Family
ID=65393136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820648766.4U Expired - Fee Related CN208532694U (en) | 2018-05-03 | 2018-05-03 | A kind of residual neat recovering system for coal tar oil processing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208532694U (en) |
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2018
- 2018-05-03 CN CN201820648766.4U patent/CN208532694U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 471012 east of National Road 207, Jili District, Luoyang City, Henan Province (within the petrochemical industry cluster area) Patentee after: Luoyang Haohai Environmental Protection Technology Co., Ltd Address before: 471000, Henan, Luoyang Province, 207 National Road East (petrochemical industry cluster area) Patentee before: Luoyang Haohai Industry & Trade Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190222 Termination date: 20210503 |