CN102925603A - Process and device for recycling pressure-equalizing diffusion gas at blast furnace top - Google Patents
Process and device for recycling pressure-equalizing diffusion gas at blast furnace top Download PDFInfo
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- CN102925603A CN102925603A CN201210435523XA CN201210435523A CN102925603A CN 102925603 A CN102925603 A CN 102925603A CN 201210435523X A CN201210435523X A CN 201210435523XA CN 201210435523 A CN201210435523 A CN 201210435523A CN 102925603 A CN102925603 A CN 102925603A
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- 238000000034 method Methods 0.000 title claims abstract description 52
- 238000009792 diffusion process Methods 0.000 title claims abstract description 28
- 238000004064 recycling Methods 0.000 title abstract description 15
- 239000000428 dust Substances 0.000 claims abstract description 32
- 239000004744 fabric Substances 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 claims abstract description 9
- 239000003034 coal gas Substances 0.000 claims description 112
- 238000011084 recovery Methods 0.000 claims description 90
- 238000007599 discharging Methods 0.000 claims description 47
- 230000000740 bleeding effect Effects 0.000 claims description 14
- 238000009434 installation Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 105
- 238000010410 dusting Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 239000012716 precipitator Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Filtering Of Dispersed Particles In Gases (AREA)
- Blast Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a process and a device for recycling pressure-equalizing diffusion gas at the blast furnace top. The process is characterized by comprising the steps of enabling a feeding tank to be communicated with a dust chamber at the lower portion of a gas dry cloth bag dust removal box through a pressure-equalizing diffusion raw gas recycling pipeline, and installing a valve group for controlling connection and disconnection of the diffusion raw gas recycling pipeline on the pressure-equalizing diffusion raw gas recycling pipeline; stopping a cloth bag of the box from filtering blast furnace gas; turning on a gas blind plate valve and a gas cutting-off valve on a clean gas recycling pipeline to perform pressure relief on the box; and when the feeding tank at the blast furnace top needs gas pressure relief, turning on the valve group used for controlling connection and disconnection of the diffusion raw gas recycling pipeline and arranged on the pressure-equalizing diffusion raw gas recycling pipeline, wherein raw gas enters the dust removal box through a gas diffusion pipe and the pressure-equalizing diffusion raw gas recycling pipeline, filtered clean gas enters a clean gas main pipe through the clean gas recycling pipeline, and accordingly, recycling of pressure-equalizing diffusion gas in the feeding tank is achieved. The device for recycling the pressure-equalizing diffusion gas at the blast furnace top has the advantages of saving gas energy, avoiding environment pollution, saving investment of capital construction and being high in operation stability.
Description
Technical field
The present invention relates to a kind of a kind of blast furnace top pressure-equalizing bleeding coal-gas recovering in metallurgical gases recovery and the use of Environmental-protecting dust-removing technical field and utilizes technique and device thereof.
Background technology
Furnace top even pressure coal gas diffusion technique in the existing blast furnace production process, many employings are all pressed coal gas directly sky to be diffused technique or are set up independently dry-method dust removal of coal gas recovery system, technical having the following disadvantages:
1, contaminate environment.Discharging dust-laden coal gas had caused atmosphere, noise pollution to environment when sky was diffused.
2, waste energy.When being diffused, causes in sky the coal gas energy dissipation.
Set up independently dry-method dust removal of coal gas recovery system, increase investment, operation stability is poor.
Summary of the invention
Purpose of the present invention a kind ofly utilizes existing blast furnace gas drying bag dust removing device system to utilize technique as the filtered and recycled of blast furnace roof charger pan pressure-equalizing and discharging coal gas with regard to providing, during the release of blast furnace roof charger pan coal gas diffusion, pass through valve operation, the pressure-equalizing and discharging raw gas enters the coal gas dry method dust-remover casing, recycling dust-removing box cloth bag filters dust-laden coal gas, coal gas enters gas main after filtering, and reaches to recycle blast furnace top pressure-equalizing bleeding coal-gas recovering technique and the device thereof that requires.
Solution of the present invention is such:
Recovery technique of the present invention comprises step:
(1), be communicated with charger pan and coal gas dry-method bag-type dust collecting lower box dirt air chamber with pressure-equalizing and discharging raw gas recovery channel, install at pressure-equalizing and discharging raw gas recovery channel and control the valve group of diffusing raw gas recovery channel break-make;
(2), close the 3rd sealed butterfly valve and the 4th sealed butterfly valve that dust-removing box is imported and exported, stop casing cloth bag blast furnace gas and filter;
(3), open coal gas blank-plate valve and gas stop valve on the purified gas recovery channel, carry out the casing release;
(4), the top charging tank carries out coal gas release step, opens the valve group that raw gas recovery channel break-make is diffused in control is installed on the pressure-equalizing and discharging raw gas recovery channel, allows charger pan be communicated with coal gas dry-method bag-type dust collecting lower box dirt air chamber;
(5), pressure-equalizing and discharging coal-gas recovering step: between the air-purifying chamber of the top of purified gas house steward and dust-removing box, set up the purified gas recovery channel with the on-off valve group, when the top charging tank carries out the coal gas release, open the on-off valve group between purified gas house steward and dust-removing box, raw gas is by pressure-equalizing and discharging raw gas recovery channel, enter dust-removing box, purified gas after the filtration enters the purified gas house steward by the purified gas recovery channel, realizes the recovery of pressure-equalizing and discharging coal gas in the charger pan.
Processing step also comprises more specifically:
Pressure-equalizing and discharging raw gas recovery channel is communicated with and is communicated with simultaneously two coal gas dry-method bag-type dust collecting lower box dirt air chambers, under the prerequisite that guarantees casing cloth bag temperature, and two casings recovery emission coal gas that regularly hockets.
In described step (4), also comprise step: control is installed when diffusing the valve group of raw gas recovery channel break-make opening pressure-equalizing and discharging raw gas recovery channel, keeping gas stop valve keeps closing, all the other valve groups are all opened, when the top charging tank needed the coal gas release, the trip valve that turns on the gas-fire again was communicated with charger pan and coal gas dry-method bag-type dust collecting lower box dirt air chamber.
The device that the present invention reclaims above-mentioned technique is to be provided with pressure-equalizing and discharging raw gas recovery channel between charger pan and coal gas dry-method bag-type dust collecting lower box dirt air chamber, at pressure-equalizing and discharging raw gas recovery channel the valve group that raw gas recovery channel break-make is diffused in control is installed; Between the air-purifying chamber of the top of purified gas house steward and dust-removing box, be provided with the purified gas recovery channel, the valve group of control break-make is installed at the purified gas recovery channel.
Retrieving arrangement also comprises following technical scheme more specifically:
Described coal gas dry-method bag-type dust collecting casing is at least two.
The valve group of described control emission coal gas recovery tube break-make comprises the first gas stop valve, the first coal gas blank-plate valve, the first sealed butterfly valve or the second sealed butterfly valve.
The outlet side of described the first sealed butterfly valve or the second sealed butterfly valve is the inlet end that is communicated with the second coal gas blank-plate valve.
The coal gas diffusion pipe first line of a couplet on the described charger pan is connected to Y-junction, and described pressure-equalizing and discharging raw gas recovery channel is to be connected to the coal gas diffusion pipe, thereby is communicated with charger pan.
Control on-off valve group is installed on the described purified gas recovery channel comprises the 3rd coal gas blank-plate valve, the second gas stop valve.
Advantage of the present invention is:
(1) the gas saving energy.Shaft furnace charging tank coal gas to after the sky discharging, by recycling behind the Bag filter, has not reclaimed the energy;
(2) avoid environmental pollution.The blast furnace bucket emission coal gas is avoided environment is caused topsoil, noise pollution after recycling.
(3) save initial cost.All considering in the blast furnace gas dry dusting design has the overhaul reserve casing, utilizes existing blast furnace gas dry dusting casing, does not need to aim at the blast furnace out-spreading coal-gas recovering and utilizes and newly-built dust-removing box, saves the fund input in early stage.
(4) operation stability is high.Utilize 2 casings of blast furnace gas dry dusting to reclaim emission coal gas, under the prerequisite that guarantees casing cloth bag temperature, 2 casings recovery emission coal gas that regularly hockets.In the actual motion, wherein 1 casing reclaims emission coal gas, and 1 is dropped into the dedusting of blast furnace gas explained hereafter in addition, guarantees the steady running of dust-removal cloth-bag.
Description of drawings
Accompanying drawing is used for explaining the present invention.
Accompanying drawing 1 is traditional blast furnace top pressure-equalizing bleeding gas process and device schematic diagram thereof.
Accompanying drawing 2 is retrieving arrangement schematic diagram of the present invention.
Embodiment
Each parts detail is as follows in the present embodiment accompanying drawing:
1, blast-furnace body, 2, charger pan, 3, hopper, 4, the coal gas equalizing valve, 5, the coal gas diffusion pipe, 6, to empty diffusion valve, 7, the first gas stop valve, 8, pressure-equalizing and discharging raw gas recovery channel, 9, the first coal gas blank-plate valve, 10, the first sealed butterfly valve, 11, the second sealed butterfly valve, 12, blast furnace half purified gas house steward, 13, the 3rd sealed butterfly valve, 14, the second coal gas blank-plate valve, 15, the coal gas dry-method bag-type dust collecting casing, 16, the purified gas recovery channel, 17, the 3rd coal gas blank-plate valve, 18, the second gas stop valve, 19, the purified gas house steward, 20, dry method dust casing diffusion valve, 21, the 4th coal gas blank-plate valve, 22, the 4th sealed butterfly valve, 23, high pressure purified gas house steward, 24, blast furnace gas ascending pipe, 25, the coal gas gravitational precipitator.
Recovery technique of the present invention, its processing step comprises:
(1), be communicated with charger pans 2 and coal gas dry-method bag-type dust collecting casing 15 bottom dirt air chambers with pressure-equalizing and discharging raw gas recovery channel 8, at pressure-equalizing and discharging raw gas recovery channel 8 the valve group that raw gas recovery channel break-make is diffused in control is installed;
(2), close the 3rd sealed butterfly valve 13 and the 4th sealed butterfly valve 22 that dust-removing box 15 is imported and exported, stop casing cloth bag blast furnace gas and filter;
(3), open coal gas blank-plate valve 17 and gas stop valve 18 on the purified gas recovery channel, carry out the casing release;
(4), top charging tank 2 carries out coal gas release step: open the valve group that raw gas recovery channel break-make is diffused in control is installed on the pressure-equalizing and discharging raw gas recovery channel 8, allow charger pan 2 be communicated with coal gas dry-method bag-type dust collecting casing 15 bottom dirt air chambers;
(5), pressure-equalizing and discharging coal-gas recovering step: between the top air-purifying chamber of purified gas house steward 19 and dust-removing box 15, set up the purified gas recovery channel 16 with the on-off valve group, when top charging tank 2 carries out the coal gas release, open the on-off valve group of 15 of purified gas house steward 19 and dust-removing boxs, raw gas is by coal gas diffusion pipe 5 and pressure-equalizing and discharging raw gas recovery channel 8, enter dust-removing box 15, purified gas after the filtration enters purified gas house steward 19 by purified gas recovery channel 16, realizes the recovery of charger pan 2 interior pressure-equalizing and discharging coal gas.
The present embodiment is the recovery technique that adopts two coal gas dry-method bag-type dust collecting devices, therefore, also comprise step: pressure-equalizing and discharging raw gas recovery channel 8 is communicated with and is communicated with simultaneously two coal gas dry-method bag-type dust collecting casings, 15 bottom dirt air chambers, under the prerequisite that guarantees casing cloth bag temperature, two casings recovery emission coal gas that regularly hockets.
Control is installed when diffusing the valve group of raw gas recovery channel break-make opening pressure-equalizing and discharging raw gas recovery channel 8, keeping gas stop valve 7 keeps closing, all the other valve groups are all opened, when top charging tank 2 needed the coal gas release, the trip valve 7 that turns on the gas-fire again was communicated with charger pan 2 and coal gas dry-method bag-type dust collecting casing 15 bottom dirt air chambers.
The retrieving arrangement of the present embodiment, between charger pan 2 and two coal gas dry-method bag-type dust collecting casing 15 bottom dirt air chambers, be provided with pressure-equalizing and discharging raw gas recovery channel 8, at pressure-equalizing and discharging raw gas recovery channel 8 the valve group that raw gas recovery channel break-make is diffused in control be installed.The valve group of described control emission coal gas recovery tube break-make comprises the first gas stop valve 7, the first coal gas blank-plate valve 9, the first sealed butterfly valve 10, the second sealed butterfly valve 11; The outlet side of described the first sealed butterfly valve 10 or the second sealed butterfly valve 11 is the inlet ends that are communicated with the second coal gas blank-plate valve 14.
For avoiding opening too much hole at charger pan 2, therefore, coal gas diffusion pipe 5 first line of a couplet of the present embodiment on described charger pan 2 are connected to Y-junction, and described pressure-equalizing and discharging raw gas recovery channel 8 is to be connected to coal gas diffusion pipe 5, thereby are communicated with charger pan 2; Coal gas diffusion pipe 5 outlet sides can be to be connected to pressure-equalizing and discharging raw gas recovery channel 8, also can be by 6 pairs of atmosphere emptying of gas bleeding valve
Blast furnace roof charger pan 2 has coal gas diffusion pipe 5 to reach empty diffusion valve 6, coal gas diffusion pipe 5 is connected pressure-equalizing and discharging raw gas recovery channel 8, pressure-equalizing and discharging raw gas recovery channel 8 is connected dry-method bag-type dust collecting casing 15 bottoms, purified gas recovery channel 16 is arranged at dry-method bag-type dust collecting casing 15 tops, purified gas recovery channel 16 is connected purified gas house steward 19, all pressures coal gas in the charger pan 2 enters dry-method bag-type dust collecting casing 15 bottom dirt air chambers through pressure-equalizing and discharging raw gas recovery channel 8, purified gas enters purified gas house steward 19 through purified gas recovery channel 16 again after filtering, the first gas stop valve 7 is installed on the pressure-equalizing and discharging raw gas recovery channel 8, the first coal gas blank-plate valve 9, the first sealed butterfly valve 10, the second sealed butterfly valve 11, the outlet side of described the first sealed butterfly valve 10 or the second sealed butterfly valve 11 is the inlet ends that are communicated with the second coal gas blank-plate valve 14, and the 3rd coal gas blank-plate valve 17 of control coal gas break-make is installed on the purified gas recovery channel 16, the second gas stop valve 18.
The outlet side of described pressure-equalizing and discharging raw gas recovery channel 8 is connected to the bottom dirt air chamber of dust-removing box 15, is connected to dust-removing box 15 and can solves dust coal gas filtration problem; Purified gas recovery channel 16 is the top air-purifying chambers that are connected to dust-removing box 15; The outlet side of purified gas recovery channel 16 is connected to purified gas house steward 19, is connected to purified gas house steward 19 and can solves the pollution problem that atmosphere emptying discharging is brought; The valve group of described control purified gas recovery channel break-make is the 3rd coal gas blank-plate valve 17, the second gas stop valve 18.
The operating process of the present embodiment is: see accompanying drawing 2, close the 3rd sealed butterfly valve 13 and the 4th sealed butterfly valve 22 that coal gas dry-method bag-type dust collecting casing 15 is imported and exported, stopping casing cloth bag blast furnace gas filters, open the first coal gas blank-plate valve 9 on the raw gas recovery channel, the first sealed butterfly valve 10 and the second coal gas blank-plate valve 14, then open the 3rd coal gas blank-plate valve 17 and the second gas stop valve 18 on the purified gas recovery channel, carry out the casing release, when top charging tank 2 needs the coal gas release, open the first gas stop valve 7, raw gas is by coal gas diffusion pipe 5 and pressure-equalizing and discharging raw gas recovery channel 8, enter coal gas dry-method bag-type dust collecting casing 15, purified gas after the filtration enters purified gas house steward 19 by purified gas recovery channel 16, realizes the recovery of charger pan 2 interior pressure-equalizing and discharging coal gas.
Claims (9)
1. blast furnace top pressure-equalizing bleeding coal-gas recovering technique is characterized in that comprising step:
(1), be communicated with charger pan (2) and coal gas dry-method bag-type dust collecting casing (15) bottom dirt air chamber with pressure-equalizing and discharging raw gas recovery channel (8), install at pressure-equalizing and discharging raw gas recovery channel (8) and control the valve group of diffusing raw gas recovery channel break-make;
(2), close the 3rd sealed butterfly valve (13) and the 4th sealed butterfly valve (22) that dust-removing box (15) is imported and exported, stop the filtration of casing cloth bag blast furnace gas;
(3), open coal gas blank-plate valve (17) and gas stop valve (18) on the purified gas recovery channel, carry out the casing release;
(4), top charging tank 2 carries out coal gas release step: open upper installation of pressure-equalizing and discharging raw gas recovery channel (8) and control the valve group of diffusing raw gas recovery channel break-make, allow charger pan (2) be communicated with coal gas dry-method bag-type dust collecting casing (15) bottom dirt air chamber;
(5), pressure-equalizing and discharging coal-gas recovering step: between the top air-purifying chamber of purified gas house steward (19) and dust-removing box (15), set up the purified gas recovery channel (16) with the on-off valve group, when top charging tank (2) carries out the coal gas release, open the on-off valve group between purified gas house steward (19) and dust-removing box (15), raw gas is by pressure-equalizing and discharging raw gas recovery channel (8), enter dust-removing box (15), purified gas after the filtration enters purified gas house steward (19) by purified gas recovery channel (16), realizes the recovery of the interior pressure-equalizing and discharging coal gas of charger pan (2).
2. blast furnace top pressure-equalizing bleeding coal-gas recovering technique according to claim 1, characterized by further comprising step: pressure-equalizing and discharging raw gas recovery channel (8) is communicated with and is communicated with simultaneously two coal gas dry-method bag-type dust collecting casings (15) bottom dirt air chamber, under the prerequisite that guarantees casing cloth bag temperature, two casings recovery emission coal gas that regularly hockets.
3. blast furnace top pressure-equalizing bleeding coal-gas recovering technique according to claim 1, it is characterized in that in described step (4), also comprise step: control is installed when diffusing the valve group of raw gas recovery channel break-make opening pressure-equalizing and discharging raw gas recovery channel (8), keeping gas stop valve (7) keeps closing, all the other valve groups are all opened, when top charging tank (2) needed the coal gas release, the trip valve (7) that turns on the gas-fire again was communicated with charger pan (2) and coal gas dry-method bag-type dust collecting casing (15) bottom dirt air chamber.
4. device that is used for blast furnace top pressure-equalizing bleeding coal-gas recovering technique, it is characterized in that between charger pan (2) and coal gas dry-method bag-type dust collecting casing (15) bottom dirt air chamber, being provided with pressure-equalizing and discharging raw gas recovery channel (8), at pressure-equalizing and discharging raw gas recovery channel (8) the valve group that raw gas recovery channel break-make is diffused in control is installed; Between the top air-purifying chamber of purified gas house steward (19) and dust-removing box (15), be provided with purified gas recovery channel (16), the valve group of control break-make is installed at purified gas recovery channel (16).
5. the device for blast furnace top pressure-equalizing bleeding coal-gas recovering technique according to claim 4 is characterized in that described coal gas dry-method bag-type dust collecting casing (15) is at least two.
6. the device for blast furnace top pressure-equalizing bleeding coal-gas recovering technique according to claim 4 is characterized in that the valve group of described control emission coal gas recovery tube break-make comprises the first gas stop valve (7), the first coal gas blank-plate valve (9), the first sealed butterfly valve (10) or the second sealed butterfly valve (11).
7. the device for blast furnace top pressure-equalizing bleeding coal-gas recovering technique according to claim 6, the outlet side that it is characterized in that described the first sealed butterfly valve (10) or the second sealed butterfly valve (11) are the inlet ends that is communicated with the second coal gas blank-plate valve (14).
8. the device for blast furnace top pressure-equalizing bleeding coal-gas recovering technique according to claim 4, it is characterized in that coal gas diffusion pipe (5) first line of a couplet on the described charger pan (2) is connected to Y-junction, described pressure-equalizing and discharging raw gas recovery channel (8) is to be connected to coal gas diffusion pipe (5), thereby is communicated with charger pan (2).
9. the device for blast furnace top pressure-equalizing bleeding coal-gas recovering technique according to claim 4 is characterized in that the upper control on-off valve group of installing of described purified gas recovery channel (16) comprises the 3rd coal gas blank-plate valve (17), the second gas stop valve (18).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210435523.XA CN102925603B (en) | 2012-11-05 | 2012-11-05 | Process and device for recycling pressure-equalizing diffusion gas at blast furnace top |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210435523.XA CN102925603B (en) | 2012-11-05 | 2012-11-05 | Process and device for recycling pressure-equalizing diffusion gas at blast furnace top |
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| CN102925603A true CN102925603A (en) | 2013-02-13 |
| CN102925603B CN102925603B (en) | 2015-06-03 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359005A (en) * | 2014-11-10 | 2015-02-18 | 河南中鸿集团煤化有限公司 | Automatic recycling device for discharged gas |
| CN106636507A (en) * | 2016-07-30 | 2017-05-10 | 柳州钢铁股份有限公司 | Blast furnace gas dry method bag type dust removing mechanical type pressure dust unloading process and device thereof |
| CN112375861A (en) * | 2020-10-30 | 2021-02-19 | 包头市泽润机械设备有限责任公司 | Blast furnace pressure-equalizing bleeding gas recovery equipment |
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| CN202945253U (en) * | 2012-11-05 | 2013-05-22 | 柳州钢铁股份有限公司 | Device for recovering constant-pressure gas discharged on top of blast furnace |
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2012
- 2012-11-05 CN CN201210435523.XA patent/CN102925603B/en not_active Expired - Fee Related
Patent Citations (4)
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| CN101476004A (en) * | 2009-02-09 | 2009-07-08 | 江苏沙钢集团有限公司 | Complete clean gas voltage equalizing method and system for blast furnace bucket |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104359005A (en) * | 2014-11-10 | 2015-02-18 | 河南中鸿集团煤化有限公司 | Automatic recycling device for discharged gas |
| CN104359005B (en) * | 2014-11-10 | 2017-02-15 | 河南中鸿集团煤化有限公司 | Automatic recycling device for discharged gas |
| CN106636507A (en) * | 2016-07-30 | 2017-05-10 | 柳州钢铁股份有限公司 | Blast furnace gas dry method bag type dust removing mechanical type pressure dust unloading process and device thereof |
| CN106636507B (en) * | 2016-07-30 | 2019-09-10 | 柳州钢铁股份有限公司 | Blast furnace gas dry bag-type dusting machinery formula pressure unloads grey technique and its device |
| CN112375861A (en) * | 2020-10-30 | 2021-02-19 | 包头市泽润机械设备有限责任公司 | Blast furnace pressure-equalizing bleeding gas recovery equipment |
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| CN102925603B (en) | 2015-06-03 |
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Granted publication date: 20150603 |