CN208500646U - A kind of processing system of desulfurization wastewater - Google Patents
A kind of processing system of desulfurization wastewater Download PDFInfo
- Publication number
- CN208500646U CN208500646U CN201821032321.XU CN201821032321U CN208500646U CN 208500646 U CN208500646 U CN 208500646U CN 201821032321 U CN201821032321 U CN 201821032321U CN 208500646 U CN208500646 U CN 208500646U
- Authority
- CN
- China
- Prior art keywords
- spray drying
- drying tower
- desulfurization wastewater
- tower
- waste water
- 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.)
- Expired - Fee Related
Links
- 239000002351 wastewater Substances 0.000 title claims abstract description 62
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 44
- 230000023556 desulfurization Effects 0.000 title claims abstract description 44
- 238000001694 spray drying Methods 0.000 claims abstract description 45
- 239000007789 gas Substances 0.000 claims abstract description 27
- 239000012716 precipitator Substances 0.000 claims abstract description 27
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003546 flue gas Substances 0.000 claims abstract description 21
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 10
- 238000011084 recovery Methods 0.000 claims abstract description 6
- 239000000428 dust Substances 0.000 claims description 16
- 239000012528 membrane Substances 0.000 claims description 14
- 239000003517 fume Substances 0.000 claims description 10
- 239000000284 extract Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 239000011214 refractory ceramic Substances 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 239000003500 flue dust Substances 0.000 claims 1
- 239000003595 mist Substances 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- 238000000034 method Methods 0.000 description 7
- 238000001704 evaporation Methods 0.000 description 6
- 239000002956 ash Substances 0.000 description 5
- 230000008020 evaporation Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 238000000889 atomisation Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 239000013618 particulate matter Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical class OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005189 flocculation Methods 0.000 description 1
- 230000016615 flocculation Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 239000012510 hollow fiber Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000000108 ultra-filtration Methods 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model discloses a kind of processing systems of desulfurization wastewater in technical field of waste water processing, including desulfurizing tower and spray drying tower, rotary atomizer is provided in spray drying tower, gas distributor is provided with below rotary atomizer, the desulfurization wastewater that desulfurizing tower generates is delivered to three headers, three headers are for desulfurization wastewater processing, the liquid outlet of three headers is connected to the inlet of waste water pump, the liquid outlet of waste water pump passes through pipeline connection spray drying tower, the flue gas extracted from flue is delivered in spray drying tower after hot precipitator purifies, the bottom of spray drying tower is discharge port, inorganic salinity after drying is delivered to salinity recovery system from discharge port；The utility model structure is simple, easy to operate, at low cost.
Description
Technical field
The utility model belongs to technical field of waste water processing, in particular to a kind of processing system of desulfurization wastewater.
Background technique
With the raising of China's economic level, industry, household electricity demand are increasing, and the current country is mainly sent out with firepower
Based on electricity, coal consumption amount increases, and China's atmosphere pollution is caused to show the trend for accelerating to deteriorate.In order to reach, " thermal power plant is big
Gas pollutant emission standard " (GB13223-2011), the standard that desulfurization method of limestone-gypsum technique has become coal-burning power plant matches
It sets.But the technique is in the process of running, can generate the desulfurization wastewater containing various impurity, to include suspended matter, oversaturated
Sulphite, sulfate and heavy metal, wherein being much the first pollutant in national environmental standard.
Currently, domestic have power plant to want using evaporative crystallization technique to desulfurization wastewater progress advanced treating to reach zero-emission
Ask, but the technique construction investment and operating cost it is higher.
Utility model content
For the defects in the prior art, the purpose of the utility model is to overcome above-mentioned deficiencies in the prior art
Place, provides a kind of processing system of desulfurization wastewater, this device is easy to operate, at low cost.
Purpose of the utility model is realized as follows: a kind of processing system of desulfurization wastewater, including desulfurizing tower and spraying
Drying tower is provided with rotary atomizer in spray drying tower, gas distributor, the desulfurization is provided with below rotary atomizer
The desulfurization wastewater that tower generates is delivered to three headers, and the liquid outlet of three headers is connected to the inlet of waste water pump, and waste water pump goes out liquid
For mouth by pipeline connection spray drying tower, the flue collector between Benitration reactor and air preheater extracts hot fume, hot cigarette
Gas is delivered in spray drying tower after hot precipitator purifies, and the bottom of spray drying tower is discharge port, inorganic after drying
Salinity is delivered to salinity recovery system from discharge port.
In the utility model, the desulfurization wastewater generated from desulfurizing tower is after three headers carry out quenched precipitating, using film
Filter depth removes oil removal, and desulfurization wastewater is then delivered to the rotary atomizer in spray drying tower by waste water pump, from
One hot fume is extracted in flue collector between SCR denitration reaction device and air preheater, after first passing through hot precipitator purification
Enter spray drying tower through gas distributor, the desulfurization wastewater drop sprayed with rotary atomizer comes into full contact with, and waste water steams rapidly
Dry, moisture enters in flue gas, and the inorganic salinity for evaporating precipitation falls into drying tower bottom discharge port, and inorganic salinity enters from discharge port
Salinity recovery system；The utility model structure is simple, easy to operate, using the hot fume heat before air preheater, is not required to volume
Outer steam, it is at low cost；Ash-laden gas stream passes through hot precipitator, preferentially eliminates the particulate matter in flue gas, and removal flies in advance
Ash improves evaporitic environment in subsequent drying tower, and the salinity for avoiding flying dust and evaporation from being precipitated mixes and influence the resource of flying dust
Change and utilizes；It can be applied in the work of processing desulfurization wastewater.
In order to realize the adjustability for being passed through exhaust gas volumn in spray drying tower, spray drying tower inlet is provided with can be according to cigarette
Temperature degree adjusts the inlet baffle door for entering exhaust gas volumn in spray drying tower, and inlet baffle door is electric adjustable nodal pattern baffle door.
In order to further purify the flue gas discharged from spray drying tower, the side of the spray drying tower is provided with outlet
Mouthful, in the lower part of spray drying tower, gas outlet is connected to electric precipitator for gas outlet, and electric precipitator removes the particle dust in flue gas
It is passed through desulfurizing tower by air-introduced machine, the flue gas after desulfurizing tower desulfurization is passed through chimney.
For further cleaning and desulfurization waste water, the liquid outlet of three header is connected to membrane filter, filters through membrane filter
Waste water afterwards is delivered in waste water pump.
In order to realize the charging of spray drying tower, the pipeline that the waste water pump is connected to spray drying tower equipped with a high position to
The top of spray drying tower is arranged in hopper, the high position feed box.
As a further improvement of the present invention, the hot precipitator is high-temperature particle bed filter collector, high-temperature metal
Filter collector or refractory ceramics filter collector.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Wherein, 1 three header, 2 membrane filters, 3 waste water pumps, 4 outlet damper doors, 5 air preheaters, 6 Industrial Boilers, 7 nitre
Reactor, 8 hot precipitators, 9 gas distributors, 10 rotary atomizers, 11 high-order feed boxs, 12 electric precipitators, 13 air-introduced machines,
14 desulfurizing towers, 15 chimneys, 16 spray drying towers.
Specific embodiment
The utility model is further described with reference to the accompanying drawing.
A kind of processing system of desulfurization wastewater as shown in Figure 1, including desulfurizing tower and spray drying tower, in spray drying tower
It is provided with gas distributor and rotary atomizer, the desulfurization wastewater that desulfurizing tower generates is delivered to three headers, and three headers include successively
The liquid outlet of neutralization case, flow tank and the flocculation tanks of connection, three headers is connected to membrane filter, through the filtered waste water of membrane filter
It is delivered in waste water pump, the pipeline that waste water pump is connected to spray drying tower is equipped with high-order feed box, and the liquid outlet of waste water pump is logical
Pipeline connection high position feed box is crossed, high-order feed box is arranged in the top of spray drying tower, air is continually fed into air preheater,
The air outlet of air preheater exports hot wind, and the hot wind of output is passed through Industrial Boiler, the hot fume that Industrial Boiler generates and from de-
The output of nitre reactor, the flue collector between Benitration reactor and air preheater extract hot fume, and hot fume is through high-temperature dust removal
Be delivered in spray drying tower after device purification, the bottom of spray drying tower is discharge port, it is dry after inorganic salinity from discharge port
It is delivered to salinity recovery system.
In order to realize the adjustability for being passed through exhaust gas volumn in spray drying tower, being provided at the air inlet of spray drying tower can root
The inlet baffle door for entering exhaust gas volumn in spray drying tower is adjusted according to flue-gas temperature, inlet baffle door is electric adjustable nodal pattern baffle
Door.
In order to further purify the flue gas discharged from spray drying tower, the side of spray drying tower is provided with gas outlet,
Gas outlet is in the lower part of spray drying tower, and gas outlet is connected to electric precipitator, after electric precipitator removes the particle dust in flue gas
It is passed through desulfurizing tower through air-introduced machine, the flue gas after desulfurizing tower desulfurization is passed through chimney.
In addition, hot precipitator is preferably refractory ceramics filter collector in the present embodiment.
In the utility model, the desulfurization wastewater generated from desulfurizing tower is after three headers carry out quenched precipitating, using film
Filter depth removes oil removal, desulfurization wastewater is then delivered to high-order feed box by waste water pump, in the self weight of desulfurization wastewater
Under, the rotary atomizer into spray drying tower is reserved for one's own use from the discharge port of high-order feed box, it is pre- from SCR denitration reaction device and air
One hot fume is extracted in flue collector between hot device, is done through gas distributor into spraying after first passing through hot precipitator purification
Dry tower, the desulfurization wastewater drop sprayed with rotary atomizer come into full contact with, and waste water is evaporated rapidly, and moisture enters in flue gas, evaporation
The inorganic salinity of the major part of suction falls into drying tower bottom discharge port, and inorganic salinity enters salinity recovery system from discharge port, few
It measures fine inorganic salinity and flows into the processing trapping of subsequent electric precipitator with flue gas to remove suspended particulate, treated flue gas is through air inducing
Machine is extracted to desulfurization in desulfurizing tower, and the flue gas after desulfurization is discharged through chimney；The utility model structure is simple, easy to operate, utilizes
Hot fume heat before air preheater is not required to additional steam, at low cost；Desulfurization wastewater passes through three headers and membrane filter
Afterwards, the solid impurities such as the suspended matter in waste water, metal ion are substantially removed, and being conducive to desulfurization wastewater evaporation can be improved drying
Tower bottom lime-ash saliferous rate；Ash-laden gas stream passes through hot precipitator, preferentially eliminates the particulate matter in flue gas, and removal flies in advance
Ash improves evaporitic environment in subsequent drying tower, and the salinity for avoiding flying dust and evaporation from being precipitated mixes and influence the resource of flying dust
Change and utilizes；It can be applied in the work of processing desulfurization wastewater.
Below with reference to specific embodiment, the invention will be further described, but the not limited to this implementation of the utility model
Example.
Flue gas is generated by fully-automatic coal-fired boiler, and actual condition exhaust gas volumn is 500 ~ 600m3/h, is aided with SAG-410 type gas
Colloidal sol generator adds appropriate burned-coal fly ash in flue gas, and 350 ~ 380 DEG C of smoke temperature, what this example high temperature deduster was selected is ceramics
High temperature filtration deduster is built-in with 48 ceramic fibre sleeves, and main membrane module is polyvinyl chloride hollow fiber in membrane filter
Ultrafiltration membrane, aperture 1mm；Ash-laden gas is introduced into SCR reactor, enters rotation after removing dust into ceramic high temperature dust-extraction unit
Turn atomisation drying tower, desulfurization wastewater pumps supreme position feed box by waste water lifting after three headers, membrane filter, by pre-
The high-temperature flue gas of processing contacts evaporation with the desulfurization wastewater after atomization.Spray drying tower tower diameter 1.25m, tower height 5m, wastewater treatment
25-40kg/h is measured, desulfurization wastewater solid content 3-5%, Cl- concentration is 12000mg/L；Enter electric precipitator, desulfurizing tower later.Through
Full-automatic smoke dust sampler test, hot precipitator import dust total concentration are 8869.44mg/m3 to WJ-60B Pitot tube in parallel,
Outlet dust total concentration is 6.21mg/m3；Drying tower entrance desulfurization wastewater solid content is after three headers and membrane filter
4%, use ion chromatograph (ICS-2100) test in desulfurization wastewater Cl- concentration be spray-dried tower bottom for 12000mg/L
Outlet lime-ash chlorinty is 0.9g/g(lime-ash), water content is 3% or so, and the flying dust chlorinty in electric precipitator is 0.03g/g
(flying dust) illustrates that 90% salinity is discharged by drying tower lower hopper.
Comparative example
Remove three headers and membrane filter after the hot precipitator and desulfurizing tower being arranged before drying tower, tests drying
It is exported before and after tower, flying dust chlorinty in electric precipitator.
Drying tower bottom ashe chlorinty is 0.23g/g, and moisture content is 15% or so, and flying dust chlorinty is in electric precipitator
0.53g/g。
The utility model is not limited to above-described embodiment, and hot precipitator is also chosen as high-temperature particle bed filter collector
Or high-temperature metal filter collector, on the basis of technical solution disclosed by the utility model, those skilled in the art according to
Disclosed technology contents, some replacements and change can be made to some of which technical characteristic by not needing creative labor
Shape, these replacements and deformation are in scope of protection of the utility model.
Claims (6)
1. a kind of processing system of desulfurization wastewater, including desulfurizing tower and spray drying tower, rotation mist is provided in spray drying tower
Change device, be provided with gas distributor below rotary atomizer, which is characterized in that the desulfurization wastewater conveying that the desulfurizing tower generates
To three headers, the liquid outlet of three headers is connected to the inlet of waste water pump, and the liquid outlet of waste water pump is done by spraying by pipeline connection
Dry tower, the flue collector between Benitration reactor and air preheater extract hot fume, and hot fume is after hot precipitator purifies
It is delivered in spray drying tower, the bottom of spray drying tower is discharge port, and the inorganic salinity after drying is delivered to salt from discharge port
Divide recovery system.
2. a kind of processing system of desulfurization wastewater according to claim 1, which is characterized in that the spray drying tower entrance
Place is provided with can adjust the inlet baffle door for entering exhaust gas volumn in spray drying tower according to flue-gas temperature, and inlet baffle door is electronic
Adjustment type baffle door.
3. a kind of processing system of desulfurization wastewater according to claim 1, which is characterized in that the side of the spray drying tower
Portion is provided with gas outlet, and in the lower part of spray drying tower, gas outlet is connected to electric precipitator for gas outlet, and electric precipitator is by flue gas
It is passed through desulfurizing tower through air-introduced machine after grain flue dust removal, the flue gas after desulfurizing tower desulfurization is passed through chimney.
4. a kind of processing system of desulfurization wastewater according to claim 1, which is characterized in that the liquid outlet of three header
It is connected to membrane filter, is delivered in waste water pump through the filtered waste water of membrane filter.
5. a kind of processing system of desulfurization wastewater according to any one of claims 1 to 4, which is characterized in that the waste water
It pumps the pipeline being connected to spray drying tower and is equipped with high-order feed box, the upper of spray drying tower is arranged in the high position feed box
Side.
6. a kind of processing system of desulfurization wastewater according to claim 5, which is characterized in that the hot precipitator is height
Warm granular-layer dust precipitator, high-temperature metal filter collector or refractory ceramics filter collector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821032321.XU CN208500646U (en) | 2018-07-02 | 2018-07-02 | A kind of processing system of desulfurization wastewater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821032321.XU CN208500646U (en) | 2018-07-02 | 2018-07-02 | A kind of processing system of desulfurization wastewater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208500646U true CN208500646U (en) | 2019-02-15 |
Family
ID=65282079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821032321.XU Expired - Fee Related CN208500646U (en) | 2018-07-02 | 2018-07-02 | A kind of processing system of desulfurization wastewater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208500646U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108609795A (en) * | 2018-07-02 | 2018-10-02 | 江苏华电扬州发电有限公司 | A kind of processing system and method for desulfurization wastewater |
| CN109987771A (en) * | 2019-05-10 | 2019-07-09 | 成都三顶环保科技有限公司 | Method for treating desulfurized wastewater and equipment |
| CN111701445A (en) * | 2020-06-08 | 2020-09-25 | 陈宏林 | High-salinity wastewater tail end curing process |
-
2018
- 2018-07-02 CN CN201821032321.XU patent/CN208500646U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108609795A (en) * | 2018-07-02 | 2018-10-02 | 江苏华电扬州发电有限公司 | A kind of processing system and method for desulfurization wastewater |
| CN109987771A (en) * | 2019-05-10 | 2019-07-09 | 成都三顶环保科技有限公司 | Method for treating desulfurized wastewater and equipment |
| CN109987771B (en) * | 2019-05-10 | 2021-09-10 | 成都三顶环保科技有限公司 | Desulfurization wastewater treatment method and equipment |
| CN111701445A (en) * | 2020-06-08 | 2020-09-25 | 陈宏林 | High-salinity wastewater tail end curing process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106477794B (en) | The System and method for of desulfurization wastewater concentration and flue gas drying integrated treatment | |
| CN208500646U (en) | A kind of processing system of desulfurization wastewater | |
| CN108609795A (en) | A kind of processing system and method for desulfurization wastewater | |
| CN108006683A (en) | A kind of method and apparatus that desulfurization wastewater zero-emission is realized using full flue gas | |
| CN104150552B (en) | The heat-engine plant desulfurized waste water evaporate to dryness tower of a kind of process | |
| CN107954560A (en) | The technique that vapor recompression is concentrated by evaporation joint flue spray technique processing waste water | |
| CN204897466U (en) | Desulfurization waste water zero release integrated device | |
| CN208008493U (en) | A kind of equipment that flue residue heat is used for Waste Water From Fire Power Plant zero discharge treatment | |
| CN106512456B (en) | A kind of four sections of method vaporising devices and method of desulfurization wastewater | |
| CN204569462U (en) | Neat stress recirculation type desulfurization wastewater spraying treatment unit | |
| CN106587235A (en) | Full-load gradient flue gas waste heat evaporative waste water control system and control method thereof | |
| CN109650476A (en) | A kind of desulfurization wastewater zero-emission system and method | |
| CN107857321A (en) | A kind of technique for Waste Water From Fire Power Plant zero discharge treatment | |
| CN109607653A (en) | Wastewater zero discharge and desulfurization fume disappear white integrated treatment unit and processing method | |
| CN111792690A (en) | Device and method for realizing zero discharge of desulfurization wastewater by using flue gas waste heat | |
| CN110898584A (en) | Low-temperature wet type flue gas dust and white removal device and using method thereof | |
| CN206799197U (en) | A kind of undersaturation flue gas condensing crystallizing desulfurization wastewater zero-discharge treatment system | |
| CN206607042U (en) | A kind of full load gradient fume afterheat evaporating waste water control system | |
| CN108190986A (en) | A kind of flue is classified pre- thermal evaporation desulfurization wastewater Zero discharging system and its method of work | |
| CN108557930B (en) | The method comprises the following steps of: waste water from power plants processing device and method | |
| CN103933813A (en) | Combined dust removing and defogging device for smoke | |
| CN110559837A (en) | Flue gas desulfurization tower and flue gas desulfurization and wastewater treatment process | |
| CN108499344A (en) | A kind of biomass flue gas dust-removal and desulfurizing denitrating system | |
| CN204039090U (en) | Process heat-engine plant desulfurized waste water evaporate to dryness tower | |
| CN207986735U (en) | Varying duty rotational flow evaporating tower with pre-dedusting device and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190215 |