求一篇关于加拿大的英语论文 5000字

The Canadian medical wastes treatment technology of papersKey words: the crushing waste incineration temperature high medical equipment system processing technologyAbstract: since the 1950s, medical waste disposal has attracted worldwide attention。     In 1998 promulgated "national hazardous waste list, and medical waste specified in the relevant HW01 (hospital clinical waste), HW03 (waste) and HWl6 drugs and drug sensitive material waste) (all belong to hazardous waste, especially the hospital clinical waste treatment and management not strict in packaging, storage and process may communicable substances, hazardous chemicals, immediate harm residents represent health and safety。    Keywords: Canadian medical wastes treatment technology 1。 PrefaceSince the 1950s, medical waste disposal has attracted worldwide attention, 1989, the control of hazardous wastes transboundary movement of Basel convention on, "from hospitals, medical center and clinic in medical service", "clinical waste of wastes should be controlled in category", the risk characteristics Y1 group level of 6。    2 magnitude, for infectious matter。 In 1998 promulgated "national hazardous waste list, and medical waste specified in the relevant HW01 (hospital clinical waste), HW03 (waste) and HWl6 drugs and drug sensitive material waste) (all belong to hazardous waste, medical waste is a kind of special waste great harm, the waste from the patient's primary medical wastes, diagnosis, treatment process of solid waste, it contains a lot of pathogenic microorganism, parasites, also contain other harmful substances。     Domestic medical institutions, mostly in central region, such as medical wastes, especially the hospital clinical waste treatment and management not strict in packaging, storage and process may communicable substances, hazardous chemicals, immediate harm residents represent health and safety。    2 the classification of medical wastes and harm2。1 classificationIn 1988, WHO regulation: (1) the general wastes, (2) pathology waste (organization, viscera), (3) infectious waste, (4) injury wastes sexual material); (sharp, (5) chemical wastes, (6), waste, (7) radioactive waste, (8) explosive waste (compressor)。    From the ward and inspection of the waste and infectious wastes include: (1) the needles and syringes and needles; picks (2) all (XiChang catheterization, pipe, the tube), (3) microorganism inspection used equipment, dressing (petri dishes, tubes, NiaoBei, urine bags and absorbent cotton, cotton, tape, gloves, (4) pathology waste (organization, viscera), (5) by patients, humoral, pleural effusion, ascites, bile pollution of dressings, (6) of patients of infectious diseases。    2。2 hazardsLong ago in the fight against SARS "struggle", the problem of medical wastes again, pay close attention to surface。   According to the survey, medical wastes contain a lot of pathogens, such as bacteria, viruses, fungi, actinomyces, mycoplasma, leptospirosis, chlamydia, rickettsia, etc。     Some medical wastes contains a large number of hepatitis b virus found in a high rate of surface antigen, 89%。   In addition, the organic wastes not only breed flies, mosquitoes cause the spread of the disease, and in the popular process of corruption decomposition release smelly H2S, NH3, SO2, hydrocarbons such malodorous gases and various harmful substances, these harmful material and pathogens in the attached waste material in the wind, the particles and airflow, under the action of wave in the air, the air pollution, the harm to human health。    Medical wastes not harm the social environment, the court is in hospital cross-infection and the main factors of air pollution。   In the practice of urban garbage DaiZhuangHua ward, before the waste within the chute and accumulation, ozone, black always ward。     Implement bag garbage, some wastes were still gleans pick-up, into social life。 Therefore, try to reduce the medical waste stacking, collection, transportation and link, as soon as possible free-pollution disposal, is a protection against the hospital and social environment, protect the hospital staff, health and environmental pollution prevention and the important measures。    3 the Canadian medical wastes treatment technologyHigh temperature and high pressure grinding technology 3。  1At present, the selection of medical wastes treatment method, with the increasing of medical waste incineration regulations, encourage people to seek and use more economical and feasible alternative method of equivalent treatment。     In these new processing method, Canada's technology company (covariance SHRED - wave-tech) medical wastes crushing processing technology, high temperature and high pressure is representative of a kind of method。     Figure 1。 The high-temperature and high-pressure crushing equipment Figure 2 installation and debugging of high-temperature and high-pressure crushing equipmentHigh temperature and high pressure comminution principle is to medical wastes through the car into a special alloy in pressure vessel is controlled by computer to waste vacuum and high temperature and high pressure steam, etc, make the waste treatment within the prescribed discharge standards, safety to special pulverizer thorough destruction。     After the treatment of medical waste reduction of 50 ~ 85% size, weight, become common about 20% of the sterile no virus harmless city garbage。     Applicable to hospital and clinic medical treatment, solid waste and over current reached completely general medical wastes treatment required to LOG4 (pathogens disinfection index), the standard of medical wastes at became the living garbage, finally entering the city garbage collection and processing system。     This technology in effectively reduce medical wastes, fundamentally solved such repeated use of medical appliances discarded by the secondary pollution。     At present, the company's technical covariance using equipment configuration process LOG6 disinfection standards。  High temperature and high pressure comminution process described as follows: medical wastes in high temperature and high pressure vessel (special antiseptic material trolley) and pushed into a sealed pressure vessel, 10psi vacuum and high temperature 120 ~ 150 degrees c 24-28 high-pressure steam and condensate emissions "Hg commercol steam temperature and under high pressure and step-down sent out and crushing destruction and container no virus and harmless sterile city garbage。     Canada's technology company medical wastes covariance crushing processing high-temperature and high-pressure features:1 a high degree of automation。     Medical wastes treatment process cycle by computer automatic control, computer through the special parts installed in the probe will be set with feedback signals ahead of the standard of automatic tracking, will adjust to require equipments。     In the process of waste, automatic recording instrument will equipment pressure, temperature, time and automatic vacuum record for management and monitoring。    2 safe and reliable。 In the equipment of special by special steel pressure vessel, the production security by machine, hydraulic and open electronic control, ensure triple protection device in any wrong operation circumstance, the equipment is absolutely safe state。     Pulverizer adopts PLC control system, computer logic low intensity, can crush the waterproof design torque of metal blades and equipment。    3) easy operation。 In the process of waste load automatic lift-and-descend guide will be special alloy car into and pressure vessel, and sent out vertical hydraulic elevators can be directly feeding crushing waste。     Because no direct contact with all kinds of medical wastes, equipment operation, maintenance and processing all kinds of emergency incidents no bacteria infection risk。     If choose spiral conveyer equipment and special medical wastes from extrusion leakage, make waste transport box can be sent to the dustbin of factory。    4 production site does not produce pollution problem。 No air pollution: after steam disinfection after discharge (configurable special filter), No waste pollution, water vapour condensation system become unclean through water into water pipe, Noise pollution, low noise process。    5 relative to burn, high-temperature and high-pressure crushing equipment processing equipment investment is small, easy maintenance, low cost, operation is short。    High temperature and high pressure grinding technology's weakness is waste reduction degree is not high, and cannot handle human organs and body。     The company's technical covariance medical wastes treatment equipment according to different types of 45-45min can handle 1020kg, at present the product has become the mainstream products and maximum usage in Europe, Asia, Africa and the Middle East of success。    。