WO2020021505A1 - 水净化气体系统 - Google Patents

水净化气体系统 Download PDF

Info

Publication number
WO2020021505A1
WO2020021505A1 PCT/IB2019/056399 IB2019056399W WO2020021505A1 WO 2020021505 A1 WO2020021505 A1 WO 2020021505A1 IB 2019056399 W IB2019056399 W IB 2019056399W WO 2020021505 A1 WO2020021505 A1 WO 2020021505A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
chamber
water chamber
water purification
gas system
Prior art date
Application number
PCT/IB2019/056399
Other languages
English (en)
French (fr)
Inventor
施恒忠
施钫文
Original Assignee
施恒忠
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 施恒忠 filed Critical 施恒忠
Publication of WO2020021505A1 publication Critical patent/WO2020021505A1/zh

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D47/00Separating dispersed particles from gases, air or vapours by liquid as separating agent
    • B01D47/02Separating dispersed particles from gases, air or vapours by liquid as separating agent by passing the gas or air or vapour over or through a liquid bath

Definitions

  • the present invention relates to the field of dust-containing gas purification, and in particular to a water purification gas system for removing dust impurities in exhaust gas by means of water circulation.
  • a water purification gas system comprising two or more water chambers, an air inlet pipe, a blower, an exhaust port, a water inlet port and a drain port;
  • the two or more water chambers include at least a first water chamber and a The rear water chamber is connected by air pipes between the water chambers;
  • the air pipe extends approximately vertically in the water chamber, one end extends close to below the rear water chamber, and one end is connected to the upper part of the rear water chamber;
  • the air inlet pipe One end receives exhaust gas, and the other end is connected to the first water chamber and extends close to the first water chamber;
  • the first water chamber and the rear water chamber are injected with filtered water so that the water level is higher than the air inlet pipe and The lowermost part of the trachea.
  • the rear water chamber includes a second water chamber and one or more intermediate water chambers.
  • the water purification gas system includes a water purification circulation system
  • the water purification circulation system includes a water pump, a drainage port for receiving sewage, the drainage port is connected to a clean tank and a sedimentation tank, and then connected to a water tank, and then Connect the water inlet to supply filtered water.
  • each of the first water chamber, the second water chamber and the intermediate water chamber of the water purification gas system is 12 feet long, 6 feet wide, and 12 feet high.
  • the water purification gas system may further include a curved flue-shaped flue receiving exhaust gas, one end of which corresponds to a smoke exhaust port of a factory flue, and the other end is connected to the blower, and the flue is discharged through the blower.
  • the exhaust gas After the exhaust gas enters the arc-shaped flue, it is introduced into the water purification gas system for purification.
  • the inhaled polluted air passes through strong The powerful fan blows into the water.
  • the three-inch static pressure wind generated by the fan ’s wind causes the air to tumble in the water, thereby attaching the pollutants and particulates of the polluted air to the water. It's clean, dust-free, clean air.
  • the present invention reduces the complexity of the aforementioned technology, effectively reduces dust and impurities in the exhaust gas through scalable equipment, and the processing cost is low, providing a new way to reduce exhaust gas.
  • FIG. 1 is a schematic structural diagram of an embodiment of a water filtering and purifying gas system.
  • FIG. 2 is a schematic structural diagram of another embodiment of a water filtration and purification gas system.
  • FIG. 3 is a schematic structural diagram of still another embodiment of a water filtering and purifying gas system.
  • a system 10 for purifying gas by using multiple water filters mainly includes two or more water chambers, an air inlet pipe 100, a blower 110, an exhaust port 120, a water inlet 140, and a drain 160.
  • the two or more water chambers include at least a first water chamber 200 and a rear water chamber.
  • the water chamber and the water chamber are connected through an air pipe 220.
  • the air pipe 220 extends substantially vertically in the water chamber, and one end extends close to Below the backwater chamber, one end is connected to the upper part of the backwater chamber.
  • One end of the air inlet pipe 100 receives exhaust gas through a blower 110, and the other end is connected to the first water chamber 200 and extends close to the lower side of the first water chamber 200.
  • the second water chamber 300 has an exhaust port 120 to discharge the purified gas.
  • the water chamber is filled with filtered water to make the water level higher than the lower part of the inlet pipe 100 and the air pipe 220.
  • the blower 110 compresses the exhaust gas so that the exhaust gas can pass through the filtered water and be discharged from the water surface outside the inlet pipe 100.
  • dust and / or harmful gases in the exhaust gas contact the filtration water and then adhere to it.
  • the gas discharged from the water surface is generally only preliminary cleaned and is not clean.
  • the gas then flows from the upper part of the water chamber to the gas pipe 220 in the rear water chamber and passes through the filtered water in the rear water chamber again for purification.
  • the gas purified in the after-water chamber, such as the second water chamber 300, is discharged through the exhaust port 120.
  • the system 10 has one or more rear water chambers, and the rear water chamber includes the second water chamber 300, or The intermediate water chamber 400 is disposed between the first water chamber 200 and the second water chamber 300.
  • FIG. 1 shows that the non-bottom side of the first water chamber 200 is connected to the water inlet 140 to input filtered water. In actual operation, the water in the filtered water will be lost due to evaporation or sewage. Therefore, the water chamber needs to be supplemented with filtered water.
  • FIG. 1 shows that the non-bottom side of the first water chamber 200 is connected to the water inlet 140 to input filtered water. In actual operation, the water in the filtered water will be lost due to evaporation or sewage. Therefore, the water chamber needs to be supplemented with filtered water.
  • the filtered water may be tap water, and the water inlet 140 is connected to the tap water supply; it may also be used but relatively clean water, for example, the drain of the toilet tray is connected to the water inlet 140.
  • the gas passes through the later water chamber, the gas is cleaner, and the filtered water in the middle intermediate water chamber 400 and even the last second water chamber 300 will be relatively clean relative to the first water chamber 200. Since the filtration water of each water chamber is different in degree of cleanliness, the time density of water exchange is also different.
  • each water chamber has an independent water inlet 140 for supplying filtered water.
  • the second water chamber 300 may supply tap water to enhance the purification capability.
  • each water chamber has a drainage port 160 connected to the outside, which is used to discharge the filtered water with dirty purification gas.
  • the filtered water needs to be periodically discharged from the lower part to avoid the sludge at the bottom from blocking the drainage port 160.
  • the water outlets 160 of each water chamber are independent, because the first water chamber 200 is the first water chamber for processing exhaust gas, which is generally dirty, and requires relatively dense drains 75 to prevent clogging.
  • the discharged filtered water can be cleaned, and then, relatively clean filtered water is supplied to each water chamber cyclically.
  • the water clean circulation system includes receiving sewage from the drainage port 160; the sewage is decontaminated and degreased through the clean tank 500.
  • the clean tank 500 can be added with clean substances such as detergents, or use membrane filtration, according to the industrial waste gas discharge used Different prior arts filter sewage; water is directed to the sedimentation tank 700 through the water pump 600, and the sedimentation tank 700 is generally filled with stone sand particles of various sizes, and the sewage passes through the layer of stone sand particles to remove larger pollutants.
  • the treated water enters the water tank 800 and is conveniently divided into various water chambers to supplement the filtered water.
  • the positions of the clean tank 500 and the sedimentation tank 700 can be switched and are not fixed.
  • each of the first water chamber, the second water chamber, and the intermediate water chamber is 12 feet long, 6 feet wide, and 12 feet high, so as to cope with exhaust gas produced by large industrial facilities.
  • the water purification gas system 10 for removing dust impurities in exhaust gas further includes a flue 900 for receiving industrial waste gas 930 emitted from the chimney 910 of the factory 920 .
  • the flue 900 may be in the shape of a curved ruler, one end of which corresponds to the smoke exhaust port of the chimney 910, and the other end is connected to a blower 110, and the industrial exhaust gas 930 discharged from the chimney 910 is sent to the curved flue 900 through the blower 110, and water purification gas is introduced.
  • the system 10 performs purification.
  • the water purification gas system 10 of this embodiment is purified by passing through filtered water, and finally the purified gas 940 is discharged through the exhaust port 120.
  • the sucked polluted air is blown into the water by a powerful fan.
  • the three-inch static pressure wind generated by the fan's wind causes the air to tumble in the water, thereby attaching pollutants and particulates of the polluted air to the water.
  • the air discharged after water rinsing is already clean and dust-free.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Separation Of Particles Using Liquids (AREA)

Abstract

种水净化气体系统(10),用于去除废气中的尘埃杂质,包括两个或以上水室、入气管(100)、鼓风机(110)、排气口(120)、入水口(140)和排水口(160)。两个或以上的水室至少包括第一水室(200)和在后水室,各水室之间通过气管(220)连接;气管(220)于水室内大致垂直延伸,一端延伸至接近在后水室下面,一端连接在后水室的上部;入气管(100)的一端接收废气,另一端连接入第一水室(200)延伸至接近第一水室(200)的下面;第一水室(200)和在后水室注入过滤用水使水面高于入气管(100)和气管(220)的最下部。

Description

水净化气体系统 技术领域
[0001]本发明涉及含尘气体净化领域, 具体为一种利用水循环的方式去除废气中尘埃 杂质的水净化气体系统。
背景技术
[0002]对于目前废气排放处理, 是现今全世界的一个重要课体, 由其是发展中国家的 工业的废气排放, 对生活环境的影响紧紧相扣, 例如大量的尘埃会阻碍视觉, 甚至影 响附近居民的健康。
[0003]现时较多采用运作成本偏高的气体净化技术, 例如过滤膜、 活性炭吸附、 紫外 线和臭氧灭菌等等。 当应用于比较大型的工业规模时, 更多的废气会被排出, 前述的 技术方式处理明显增加成本负担。
发明内容
[0004]为解决上述问题, 本发明所采用的技术方案是:
[0005]—种水净化气体系统, 包括两个或以上水室、 入气管、 鼓风机、 排气口、 入水 口和排水口; 所述两个或以上的水室至少包括第一水室和在后水室, 各水室之间通过 气管连接; 所述气管于水室内大致垂直延伸, 一端延伸至接近所述在后水室下面, 一 端连接所述在后水室的上部; 所述入气管的一端接收废气, 另一端连接入所述第一水 室延伸至接近所述第一水室的下面; 所述第一水室和在后水室注入过滤用水使水面高 于所述入气管和所述气管的最下部。
[0006]优选地, 所述在后水室包括第二水室和一或多于一个的中间水室。
[0007]优选地, 所述水净化气体系统包括连接水洁净循环系统, 所述水洁净循环系统 包括水泵, 接收污水的排水口, 所述排水口连接洁净池和沉淀池, 再连接水箱, 然后 连接入水口供应过滤用水。
[0008]优选地, 所述水净化气体系统的所述第一水室、 第二水室和中间水室各长 12英 尺, 宽 6英尺, 高 12英尺。
[0009]所述水净化气体系统还可包括一接收废气的曲尺形烟道, 其一端对应工厂烟道 的排烟口, 另一端则连接所述鼓风机, 通过所述鼓风机将所述烟道排出的废气进入所 述曲尺形烟道后, 导入所述水净化气体系统进行净化。 其中, 吸入的污染空气经过强 力的风扇吹入水中, 风扇的风力产生的三英寸静压风力使空气在水中翻滚, 从而把污 气的污染物及微粒微尘都附在水中, 当污染空气经过水漂洗后排出的空气已经是清洁 无尘的清洁空气了。
[0010]本发明减低了前述的技术的复杂程度, 通过可扩展性的设备有效大大减低废气 中的尘埃和杂质, 而处理成本低, 为减少废气提供了一种新途径。
附图说明
[0011]图 1为水过滤净化气体系统的一个实施例的结构示意图。
[0012]图 2为水过滤净化气体系统的另一个实施例的结构示意图。
[0013]图 3为水过滤净化气体系统的又一个实施例的结构示意图。
具体实施方式
[0014]以下结合具体图示, 进一步阐述本发明。
[0015]如图 1所示的一种利用多重水过滤净化气体的系统 10, 主要包括两个或以上水 室, 入气管 100、 鼓风机 110、 排气口 120、 入水口 140和排水口 160。
[0016]两个或以上的水室至少包括第一水室 200和在后水室, 水室与水室之间透过气 管 220连接, 气管 220于水室内大致垂直延伸, 一端延伸至接近在后水室下面, 一端 连接在后水室的上部。
[0017]入气管 100的一端通过鼓风机 110接收废气, 另一端连接入第一水室 200延伸 至接近第一水室 200的下面。 第二水室 300具排气口 120, 把经净化的气体排出。 运 作时, 水室注入过滤用水使水面高于入气管 100和气管 220的最下部, 鼓风机 110压 缩废气逼使废气能够穿越过滤用水后从入气管 100外的水面排出。 当废气穿越过滤用 水时, 废气中的尘埃和 /或有害气体接触过滤用水然后黏附其中。 排出水面的气体一般 只经初步净化, 不算干净, 气体接着从水室上部流向在后水室的气管 220再次穿越在 后水室里的过滤用水进行净化。 经在后水室例如第二水室 300净化后的气体, 经过排 气口 120排出。
[0018]由此可知, 当废气经过越多水室, 排出的气体越干净, 优选地, 系统 10具有一 个或以上的在后水室, 所述在后水室包括第二水室 300, 或者置于第一水室 200与第 二水室 300之间的中间水室 400。 [0019]图 1可见, 第一水室 200非底部一面连接入水口 140输入过滤用水。 实际运作 时, 过滤用水的水分会因为蒸发或排污等原因而流失, 因此需要对水室补充过滤用 水。 图 1虽没示出, 但过滤用水可以是自来水, 入水口 140连接自来水供应; 也可以 是使用过但比较干净的水, 例如洗手间洗手盘的排水口连接入水口 140。 当废气经过 越后的水室时, 气体越干净, 在后的中间水室 400甚至最后的第二水室 300的过滤用 水相对于第一水室 200会比较干净。 由于各水室的过滤用水干净程度不一, 换水的时 间密度也就不一样, 如图 2所示, 优选地, 每个水室都有独立的入水口 140供应过滤 用水。 根据一个实施例, 第二水室 300可供应自来水, 以增强净化能力。
[0020]每个水室的底部都有连接外面的排水口 160, 用于把净化气体变脏的过滤用水 排出。 当系统 10应用于污染比较重的工业时, 例如煤作业, 过滤用水需要定期从下部 排出, 避免底部的污泥堵塞排水口 160。 根据图 2 , 优选地, 各水室的排水口 160都是 独立的, 因为第一水室 200是第一个处理废气的水室, 一般比较脏, 需要相对密集的 排 75防堵塞。
[0021]根据本发明的一个实施例, 排出的过滤用水可进行洁净处理然后, 循环对各水 室供应比较干净的过滤用水。 该水洁净循环系统包括从排水口 160接收污水; 污水经 过洁净池 500进行除污去油处理, 洁净池 500可以添加如洁净剂等的洁净物, 或使用 薄膜过滤, 根据应用的工业废气排放使用不同的现有技术过滤污水; 透过水泵 600把 水引向沉淀池 700, 沉淀池 700—般上层置有各种大小的石沙粒,污水经过层层石沙 粒, 隔除较大的污染物例如大的尘埃粒子, 或水上的悬浮物; 处理好的水进入水箱 800方便分流入各水室补充过滤用水。 虽未示出, 洁净池 500和沉淀池 700的位置可 转换, 并不固定。 本发明可以有一个或多个的水泵 600安置于水洁净循环系统不同位 置, 引道水的流向, 其位置并不限定。
[0022]根据本发明的另一个实施例, 第一水室、 第二水室和中间水室各长 12英尺, 宽 6英尺, 高 12英尺, 以应付贴合大型工业设施产生的废气。
[0023]参考图 3 所示, 根据本发明的另一个实施例, 去除废气中尘埃杂质的水净化气 体系统 10还包括一烟道 900用以接收从工厂 920的烟囱 910所排放的工业废气 930。 烟道 900可呈曲尺形, 其一端对应烟囱 910的排烟口, 另一端则连接鼓风机 110 , 通过 鼓风机 110将烟囱 910排出的工业废气 930送入曲尺形烟道 900后, 导入水净化气体 系统 10进行净化。 同样地, 如上记载所述, 本实施例的水净化气体系统 10通过穿越 过滤用水进行净化, 最後经过排气口 120排出净化后的气体 940。 其中, 吸入的污染空 气经过强力的风扇吹入水中, 风扇的风力产生的三英寸静压风力使空气在水中翻滚, 从而把污气的污染物及微粒微尘都附在水中, 当污染空气经过水漂洗后排出的空气已 经是清洁无尘的清洁空气了。
[0024]以上显示和描述了本发明的基本原理、 主要特征和本发明的优点。 本领域的技 术人员应该了解, 本发明不受上述实施例的限制, 上述实施例和说明书中描述的只是 说明本发明的原理, 在不脱离本发明精神和范围的前提下, 本发明还会有各种变化和 改进, 包括各部分所采用的排位以及大小, 这些变化和改进都落入要求保护的本发明 范围内。 本发明要求保护范围由所附的权利要求书及其等效物界定。

Claims

权利要求书
1.一种水净化气体系统, 包括两个或以上水室、 入气管、 鼓风机、 排气口、 入水口和 排水口, 其特征在于,
所述两个或以上的水室至少包括第一水室和在后水室, 各水室之间通过气管连 接;
所述气管于水室内大致垂直延伸, 一端延伸至接近所述在后水室下面, 一端连 接所述在后水室的上部;
所述入气管的一端接收废气, 另一端连接入所述第一水室延伸至接近所述第一 水室的下面; 以及
所述第一水室和在后水室注入过滤用水使水面高于所述入气管和所述气管的最 下部。
2.根据权利要求 1所述的水净化气体系统, 其特征在于, 所述在后水室包括第二水室 和 个或多于 个的中间水室。
3.根据权利要求 2所述的水净化气体系统, 其特征在于, 所述水净化气体系统包括连 接水洁净循环系统, 所述水洁净循环系统包括水泵, 接收污水的排水口, 所述排水口 连接洁净池和沉淀池, 再连接水箱, 然后连接入水口供应过滤用水。
4.根据权利要求 2所述的水净化气体系统, 其特征在于, 所述第一水室、 第二水室和 中间水室各长 12英尺, 宽 6英尺, 高 12英尺。
5.根据权利要求 1 所述的水净化气体系统, 其特征在于, 所述水净化气体系统还包括 一接收废气的烟道, 其一端对应工厂烟囱的排烟口, 另一端则连接所述鼓风机, 通过 所述鼓风机将所述烟自排出的废气送入所述烟道后, 导入所述水净化气体系统进行净 化。
6.根据权利要求 5 所述的水净化气体系统, 其特征在于, 导入的废气经过风扇吹入水 中, 风扇的风力产生的三英寸静压风力使空气在水中翻滚, 从而把废气的污染物及微 粒微尘都附在水中, 当废气经过水漂洗后, 排出的空气为清洁空气。
7.根据权利要求 5 所述的水净化气体系统, 其特征在于, 所述接收废气的烟道呈曲尺 形。
8.根据权利要求 6 所述的水净化气体系统, 其特征在于, 所述在后水室包括第二水室 和 个或多于 个的中间水室。
9.根据权利要求 7所述的水净化气体系统, 其特征在于, 所述水净化气体系统包括连 接水洁净循环系统, 所述水洁净循环系统包括水泵, 接收污水的排水口, 所述排水口 连接洁净池和沉淀池, 再连接水箱, 然后连接入水口供应过滤用水。
10.根据权利要求 7所述的水净化气体系统, 其特征在于, 所述第一水室、 第二水室和 中间水室各长 12英尺, 宽 6英尺, 高 12英尺。
PCT/IB2019/056399 2018-07-27 2019-07-26 水净化气体系统 WO2020021505A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201821202603.XU CN208990454U (zh) 2018-07-27 2018-07-27 水净化气体系统
CN201821202603.X 2018-07-27

Publications (1)

Publication Number Publication Date
WO2020021505A1 true WO2020021505A1 (zh) 2020-01-30

Family

ID=66796641

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2019/056399 WO2020021505A1 (zh) 2018-07-27 2019-07-26 水净化气体系统

Country Status (2)

Country Link
CN (1) CN208990454U (zh)
WO (1) WO2020021505A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN208990454U (zh) * 2018-07-27 2019-06-18 施氏科技有限公司 水净化气体系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090021981A (ko) * 2007-08-29 2009-03-04 이창현 공기정화장치
CN103071350A (zh) * 2013-02-01 2013-05-01 韩旭 一种空气清洗机
CN203408591U (zh) * 2013-07-05 2014-01-29 李建荣 水洗空气综合净化机
CN205815437U (zh) * 2016-07-21 2016-12-21 薛建中 工业废气净化装置
CN206304516U (zh) * 2016-12-20 2017-07-07 上海烟草集团有限责任公司 两级式废气净化处理设备
CN206487534U (zh) * 2017-02-15 2017-09-12 福建永强力加动力设备有限公司 一种发电机尾气处理装置
CN208990454U (zh) * 2018-07-27 2019-06-18 施氏科技有限公司 水净化气体系统

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090021981A (ko) * 2007-08-29 2009-03-04 이창현 공기정화장치
CN103071350A (zh) * 2013-02-01 2013-05-01 韩旭 一种空气清洗机
CN203408591U (zh) * 2013-07-05 2014-01-29 李建荣 水洗空气综合净化机
CN205815437U (zh) * 2016-07-21 2016-12-21 薛建中 工业废气净化装置
CN206304516U (zh) * 2016-12-20 2017-07-07 上海烟草集团有限责任公司 两级式废气净化处理设备
CN206487534U (zh) * 2017-02-15 2017-09-12 福建永强力加动力设备有限公司 一种发电机尾气处理装置
CN208990454U (zh) * 2018-07-27 2019-06-18 施氏科技有限公司 水净化气体系统

Also Published As

Publication number Publication date
CN208990454U (zh) 2019-06-18

Similar Documents

Publication Publication Date Title
KR100865574B1 (ko) 폐수 자가처리 습식 집진기
CN107596777A (zh) 一种污水处理装置
JP2003284911A (ja) 集塵装置および集塵方法、該集塵装置を備えた焼却設備
WO2020021505A1 (zh) 水净化气体系统
KR101457814B1 (ko) 가스여과장치 및 가스여과시스템
CN205392065U (zh) 一种废气粉尘处理装置
CN109519999B (zh) 水箱喷雾式除油烟机
KR102204161B1 (ko) 습식 집진기
CN205549961U (zh) 一种沥青乳化剂生产废气处理装置
JP5051722B2 (ja) 水処理装置
CN212523087U (zh) 一种工业空气处理装置
CN211488986U (zh) 一种试剂柜抽风装置
KR102237734B1 (ko) 다단계 해수여과 및 살균 정수장치
JPS5835733B2 (ja) ガスナガレノ シヨリホウ
JPH05184855A (ja) 排ガス処理装置及び排ガス処理方法
KR100605731B1 (ko) 공기 청정기의 원심분리필터 구조
TWM581006U (zh) Air cleaner
CN204891488U (zh) 工业废气排放冷却净化环保系统
CN219933976U (zh) 一种火化炉粉尘处理装置
CN108870544A (zh) 一种具有清洗消毒功能的空气净化装置
RU2048863C1 (ru) Установка для очистки топочных газов
CN108619828A (zh) 一种印刷厂废气净化装置
CN208115419U (zh) 一种环保型水雾除尘装置
CN216320886U (zh) 一种用于煤场的环保除尘设备
CN218231935U (zh) 一种除渣器排气装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19840612

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 19840612

Country of ref document: EP

Kind code of ref document: A1