2024 年底，匯舸環(huán)保自主研發(fā)制造的船用尿素液制造裝置，順利交付位于日本今治的淺川船廠。設(shè)備整體性能指標達到國際領(lǐng)先水平，生產(chǎn)的尿素液產(chǎn)品，完全滿足 ISO 18611-1:2014 船用氮氧化物還原劑的質(zhì)量特性，即濃度為 40%的尿素液（AUS 40）。

據(jù)統(tǒng)計 2008 年，全球海運船舶的污染物排放量占 NOx 和 SOx 排放總量的 18%-30%和 9%。因此，國際海事組織（IMO）推出了可謂史上最嚴苛的 IMO Tier III 排放標準，其要求與 Tier II 標準相比，2 / 4符合 Tier III 標準的發(fā)動機的氮氧化物排放量須減少近 76%。而當前符合 IMO NOx Tier III 排放標準限值的現(xiàn)有技術(shù)包括：選擇性催化還原 SCR (Selective Catalytic Reduction)系統(tǒng)、廢氣再循環(huán)裝置 EGR（Exhaust Gas Recirculation）、替代燃料等。SCR 技術(shù)是降低 NOx 排放較為有效的途徑之一， 可有效脫硝 70–90%以上。

SCR 技術(shù)是指在催化劑（廣泛使用催化劑是 V2O5/TiO2）的作用下，利用還原劑（如 NH3、液氨、尿素）來“有選擇性”地與煙氣中的 NOx反應(yīng)并生成無毒無污染的 N2 和 H2O。

因此采用 SCR 技術(shù)的船舶必須補充和儲存尿素液。但是，尿素液的采購成本和運輸成本高于顆粒尿素，而且尿素液的儲存時間有限，制造商建議自生產(chǎn)之日起有效期通常為 6 到 18 個月（與儲存溫度有關(guān)）。

AUS40 尿素液可采購的港口有限，必須大量購買儲存，而未使用的殘留尿素液則很可能過期，長期儲存后如果使用前成分測試結(jié)果不合格，必須進行廢棄處理，或在 III 級限制區(qū)域外強制消費。另外，很多港口不回收 IBC 標準的尿素液包裝容器，廢棄成本很高。

目前裝船使用中的尿素液制造裝置，普遍存在尿素顆粒溶解不徹底，加料不方便，制造時溢出的氣體污染艙室環(huán)境等問題。

針對上述問題，通過采納結(jié)合各方的安裝和操作建議，匯舸環(huán)保自主研發(fā)設(shè)計了 CGT 系列尿素液制造裝置。用船舶造水機生產(chǎn)的純水按配比加入定量的尿素顆粒后，在攪拌罐內(nèi)充分攪拌，同時對攪拌罐夾套內(nèi)的加熱用淡水進行加熱，加快和確保尿素顆粒徹底溶解。同時罐體增加排氣口，按需引管到敞開甲板，使得尿素液制造場所的環(huán)境可視為零污染，確保了尿素液 AUS4O 生產(chǎn)的安全性和高質(zhì)量。

目前，各類規(guī)格型號的尿素液制造裝置在海內(nèi)外市場，特別是日本、韓國，獲得高度認可，并取得了良好的銷售業(yè)績。

在船用 AUS40 尿素液制造裝置基礎(chǔ)上，匯舸環(huán)保也已成功研發(fā)了陸用 AUS32 尿素液制造裝置，綜合了純水制造和尿素液定量加注裝置的形式，滿足陸岸上重載卡車的尿素液需求，以城市用水輸入，AUS40/AUS32 輸出的模式，滿足市場需求。

Name of invention:

A type of marine urea solution preparation equipment and its preparation method.

The product was authorized the invention patent by the State Intellectual Property Office of the People’s Republic of China on 6th Aug, 24.

Patent number: 202410307628.X

At the end of 24, Marine Urea solution production plant were successfully delivered to Asakawa Shipyard in Imabari, Japan. it was independently developed and manufactured by ContiOcean . The performance of the equipment has reached the international leading level, and the production of urea solution meet the quality characteristics of ISO 18611-1:2014--Marine NOX reduction agent AUS40- aqueous urea solution at 40 % concentration (AUS 40).

According to statistics, in 2008, the pollutant emissions of global maritime vessels accounted for 18%-30% and 9% of the total NOx and SOx emissions. As a result, the International Maritime Organization (IMO) has introduced the most stringent IMO Tier III emissions standards in history, requiring a nearly 76% reduction in NOx emissions from Tier III-compliant engines compared to Tier II standards. Existing technologies that meet IMO NOx Tier III emission limits include: Selective Catalytic Reduction (SCR) system, Exhaust Gas Recirculation (EGR), alternative fuels, etc. SCR technology is one of the more effective methods to reduce NOx emissions, It can effectively remove more than 70-90% of the nitrate.

SCR technology refers to the use of reducing agents (such as NH3, liquid ammonia, urea) to "selectively" react with NOx in flue gas and generate non-toxic and pollution-free N2 and H2O under the action of a catalyst (widely used catalyst is V2O5/TiO2).

Therefore, ships adopt SCR technology must replenish and storage urea solution. But the procurement cost and transportation cost of urea solution are higher than that of urea granules, and the storage time of urea solution is limited, and the manufacturer recommends an expiration date from the date of production: Usually 6 to 18 months (depending on storage temperature).

AUS40 urea solution can be purchased from a limited number of ports, so must be purchased in bulk for storage, but unused residual urea solution is likely to expire, and If the composition test results fail before use after long-term storage, it must be disposed of or forced consumption outside a Level III restricted area. In addition, many ports do not recycle IBC standard urea solution packaging containers, and the cost of abandonment is high.

At present, the urea solution production plant used on ships generally has problems, such as incomplete dissolution of urea granules, feeding trouble, and engine room environmental pollution of by gas overflow during manufacturing.

In view of the above problems, ContiOcean independently developed and designed the CGT series urea solution production plant, by adopting the installation and operation suggestions of various parties. Quantitative urea granules are added to the pure water produced by the ship's water generator according to the ratio, and are fully stirred in the mixing tank, while jacketed heating is used to speed up and ensure the complete dissolution of urea granules.

At the same time, an exhaust port is added to the tank, and the pipe is led to the open deck as needed, so that the environment of the urea solution production plant site can be regarded as zero pollution. Ensure the safety and high quality of AUS4O production of urea solution. At present, urea solution production plant of various specifications and models have been highly recognized in domestic and overseas markets, especially in Japan and South Korea, and have achieved good sales performance.

On the basis of the Marine AUS40 urea solution production plant, Contiocean has also successfully developed AUS32 for vehicles, which integrates the form of pure water generator and urea solution quantitative filling device, the urban water input, AUS40/AUS32 output mode, to meet the market demand.