危险化学品经营（不带有储存设施经营煤油、汽油、柴油[闭杯闪点≤60℃]，有效期至2024年9月5日）；销售食品、化工产品、第三类医疗器械；零售药品、出版物；道路货物运输；以下项目限分支机构经营：燃气经营；零售预包装食品、散装食品、乳制品（含婴幼儿配方乳粉）、保健食品、卷烟、雪茄烟、纺织品、服装、日用品、五金、家用电器、电子产品、充值卡；道路货物运输；出版物批发；旅游业务；住宿服务；餐饮服务；港口经营；供电业务；油（气）库、加油（气）站的规划、设计和建设；石油管道及相关设施的投资、建设、维护；销售润滑油、燃料油、沥青、文化用品、体育用品及器材、汽车、汽车零配件、摩托车及零配件、农副食品、化肥、农用薄膜、第一类医疗器械、第二类医疗器械、消防器材、鲜花、计算机软硬件及辅助设备、橡胶制品、机械设备、珠宝首饰、工艺品、玩具、乐器、家具、建筑材料；机动车充电桩充电；技术服务、技术咨询、技术开发、技术推广；机动车维修；物业管理；出租商业用房；机动车公共停车场服务；委托代理收取水电费；票务代理服务；日用百货便利店经营；设计、制作、代理、发布广告；汽车清洗服务；经济信息咨询；技术应用研究和计算机软件开发；货物进出口、技术进出口、代理进出口；汽车装饰；货物运输代理；出租办公用房；体育运动项目经营；汽车租赁；仓储服务。（市场主体依法自主选择经营项目，开展经营活动；该企业于2015年03月31日（核准日期）由内资企业变更为外商投资企业。零售出版物及药品、销售食品及第三类医疗器械、道路货物运输以及依法须经批准的项目，经相关部门批准后依批准的内容开展经营活动；不得从事国家和本市产业政策禁止和限制类项目的经营活动。）
The transmission of hydrogen through dedicated pipelines and the conveyance of hydrogen-doped natural gas via in-service gas pipelines are both effective methods for long-distance hydrogen transportation.To investigate and analyze the potentially hazardous consequences of ruptured hydrogen-doped natural gas and hydrogen pipelines,this study derived the calculation process for the release rate decay factor of these pipelines,as well as the calculation formula for the potential im-pact radius(PIR)from the perspective of jet fire damage.The release rate decay factor and PIR coefficient were subse-quently calculated and analyzed,considering various hydrogen blending ratios.The calculation results indicate that higher hy-drogen blending ratios correspond to only minimal decreases in both the decay factor and the PIR coefficient.When the hydro-gen blending ratio is below 10％,the coefficient of 0.099,as specified in GB 32167-2015,can be used to calculate the PIR of hydrogen-doped pipelines.Conversely,for blending ratios exceeding 10％,it is more rational to use the coefficients estab-lished in this study for PIR calculations.Additionally,the release rate decay factor for hydrogen pipelines was calculated and analyzed across various pipeline diameters.The proposed derivation method is considered applicable for calculating the PIR of other multi-component lightweight combustible gas pipelines.Emphasis is placed on the need to verify the applicability of the resulting PIR formulas based on actual accident cases.
To overcome the limitations of current water injection methods for detecting washing machine leaks and enhance the measurement efficiency of whole-machine sealing,a novel air-driven leak detection scheme based on direct pressure testing technology was proposed.A test chamber fixture and seals tai-lored to the internal dimensions of the detergent box are innovatively designed.Based on the STM32F1 microcontroller,the collection and preprocessing of air pressure analog signals were carried out for control-ling the airtightness testing process.A denoising method based on moving average and wavelet analysis was introduced during the preprocessing stage,and the required frequency band characteristics were extracted using Fast Fourier Transform.Multi-aperture simulated leak tests demonstrated that the fre-quency amplitudes remained at the lowest levels within the 0.120～0.963 Hz band when no leaks were present.A leak determination criterion was established based on the low-frequency characteristics of the signal,and the reliability of the proposed method and criterion was verified through leak detection tests on multiple washing machines at a factory.
Nitrogen oxides(NOx)and volatile organic compounds(VOCs)are significant precursors to particulate matter(PM2.5)and ozone(O3),posing serious health hazards.Photocatalytic oxidation technology is gaining increasing attention due to its mild conditions,energy efficiency,safety,and non-toxic nature.Currently,semiconductor photocatalysts,primarily based on TiO2,exhibit unique physi-cochemical properties and excellent performance,becoming a focal point in current research on atmos-pheric pollution control.This review summarizes the latest research progress in the photocatalytic oxida-tion technology for the individual and simultaneous removal of NOx and VOCs,with a focus on the po-tential roles of TiO2 photocatalysts and other photocatalysts.It also explains strategies for enhancing photocatalytic activity,such as noble metal doping,non-metal doping,and semiconductor coupling.Additionally,it reviews experimental parameters,removal efficiency,and degradation mechanisms for photocatalytic degradation of flue gas NOx and VOCs.This review aims to summarize the structure-per-formance-application relationship in the development of semiconductor photocatalytic materials,provide parameter support and optimization suggestions for research on the simultaneous removal of flue gas NOx and VOCs,discuss new catalyst preparation and modification approaches,and promote future research on the co-removal of NOx and VOCs by photocatalytic oxidation.
Hydrophobic silica coated with 1,2-polybutadiene(Silica-PBs)was prepared using thiol-ene click method.Infrared spectroscopy and X-ray photoelectron spectroscopy analysis confirmed that the surface of Silica-PBs was coated with 1,2-polybutadiene with excess vinyl groups.The vulca-nized rubber prepared by blending Silica-PBs with styrene-butadiene rubber(SBR)exhibited superior comprehensive properties compared to vulcanizate modified with silane coupling agents.Rubber pro-cessing analyzer and electron microscopy analysis demonstrated that Silica-PBs exhibited better dispersion in SBR,and could form"buffer zone"be-tween the filler and rubber molecular chain,provi-ding a certain buffering effect when the filler slipped within the rubber molecular chain.Dynamic me-chanical properties tests indicated that Silica-PBs improved the dynamic mechanical properties of SBR/Silica-PBs composites by more than 8％compared to traditional silica,and could be used as an ideal filler for green tires.
