Steris Europe Inc Suomen Sivuliike

Steris Europe Inc.

Mauri Salmisuo

Teppo J Nurminen

Juha Mattila

Ilkka Laitinen

Jani Pettersson

Arja Ruley

Riku Hälli

Ilkka Olavi Laitinen

Jani Petterson

A device in which exhaust fluid from a facility or equipment for treating biologically active material is heated to a temperature of at least 400&#xb0; C. to kill or denature hazardous agents, and conveyed through a metal filter with no more than 0.1 &#x3bc;m pore size, which is heated, preferably by the fluid, to essentially the same temperature. The relevant temperature is maintained during operation in both the fluid and the filter. Since the filter is dimensioned to trap microbial agents like bacteria and viruses and the temperature of the filter surfaces is sufficient for sterilization, microbial agents are bound to come into contact with said surfaces and a very high degree of sterilization certainty is reached. The filter is welded to the device body to provide a seamless structure. Heating and filtration are both alone sufficient for removing biohazardous agents, so the device provides double security.

Device for sterilization of a fluid phase

The invention relates to the sterilization of a load of goods with hydrogen peroxide vapor in a closed space. The method involves a sequence of creating a sub-atmospheric pressure in a sterilization chamber, introduction of vaporized hydrogen peroxide and the use of a gas circulation device within the sterilization chamber, whereby the output of the gas circulation device is controlled according to the pressure in the sterilization chamber. A uniform and consistent distribution of hydrogen peroxide throughout the load is achieved.

Method and device for hydrogen peroxide sterilization

Vaporized hydrogen peroxide is used for decontamination of enclosed and sealed areas. It is capable of destroying all forms of microbial life. It is commonly produced from a solution of liquid HOand water, by means of generators specifically designed for the purpose. The present invention provides a combined source for heating steam and vaporized hydrogen peroxide and a method for simultaneously supplying steam and vaporized hydrogen peroxide. A device according to the invention comprises a chamber adapted for receiving water through an inlet and expelling steam through an outlet. A vessel for receiving and vaporizing hydrogen peroxide solution is provided in close contact with the chamber. Heat from the water vapor in the chamber is allowed to supply the required energy for producing hydrogen peroxide vapor in the vessel from an aqueous solution.

Method and device for generating steam and gaseous hydrogen peroxide

The invention relates to a device and a method for the separation of solids from a biowaste slurry before heat treatment, and for heat treatment of the separated solids. The device comprises a chamber with a main inlet port for feeding slurry, and outlet ports. A unit for separating solids is adapted to an outlet port so, that liquid leaving the chamber has passed through the separation unit. A second outlet port is provided directly from the chamber to allow removal, following sterilization, of solids collected in the chamber. The sterilization is secured by temperature monitoring at representative locations.

Solids separator and method of treatment for biowaste

A method for cooling a jacketed autoclave or steam sterilizer by allowing a film of water to flow down as inner wall of the sterilizer's jacket. Condensate from the jacket space is drawn into a water ring pump. The water ring pump draws condensate from the lowest point of the jacket to a water side of the pump, and gas from the jacket to a normal suction inlet of the pump. During the process of cooling the sterilizer, a stream of water and air from the water ring pump is conducted to an upper part of the jacket of the steam sterilizer and is allowed to flow as a film down the inner wall of the jacket. Evaporation of the water is enhanced by lowering the pressure in the jacket.

Method of cooling a sterilizer

In a multi-effect falling-film evaporator, purified water for special purposes is produced. In each effect, a steam phase and a water phase is produced from the feed water. The steam phase is used for heating in the subsequent effect, whereby it condenses to product water, and the water phase becomes the feed stream for the subsequent effect. A reject stream is removed from the process to carry off impurities separated from the water. According to the invention, a reject stream is removed from each effect. Preferably, each reject stream is a condensed fraction of the steam generated in the respective effect.

Method and device for treating water

Purified water for special purposes is produced using a falling-film multieffect evaporator. From the feed water, each effect produces a steam phase and a water phase. The steam phase is used for heating in the subsequent evaporating step, whereby the steam phase condenses to product water, and the water phase becomes feed water for the subsequent evaporation step. According to the invention, the product water may be wholly or partly recycled to the initial feed water, allowing process startup and sterilisation of the plant without conducting hot product water to the drain.

The invention relates to a method and a device for the production of pure steam. A falling-film evaporator is used. Of the water-steam mixture leaving the evaporator unit, part of the water is collected at the bottom of the device, and a fraction mainly consisting of steam enters a rising spiral channel for the separation of impurities. In the periphery of the spiral channel apertures are provided for separating impurity-containing droplets, which condense on a surface outside the apertures. The liquid formed is removed from the device. The water phase collected at the bottom enters a recycle line connected to the feed end of the evaporator unit. Feed water is supplied to the recycle line to compensate for pure steam consumption.

Method and device for the production of purified steam

Continuous biowaste sterilization process, the operability of which is ensured in such a way that during process startup, extreme conditions possibly coming into question during operation are simulated, i.e. the greatest possible flow rate and the lowest temperature of the feed flow. In the startup stage, a liquid to be sterlized is circulated in the apparatus, until the capacity has been ascertained, whereafter the discharge stream can be conducted to a sewer system. The apparatus according to the invention comprises, in the flow direction of the biowaste-containing liquid, a storage tank, at least one feed pump capable of delivering a constant flow, at least one heating unit, at least one cooling unit, and a circulation circuit for circulating the biowaste-containing liquid through the heating unit, as well as connecting piping and valves. By means of specific piping and valve arrangements it is also ensured that all parts of the apparatus can be sterilized for maintenance purposes.

Method and apparatus for the sterilization of biological waste

In the production of water vapor, particularly in the production of especially clean water vapor, dissolved gases, mainly atmospheric gases, are removed from feed water ( ). The feed water is sprayed by a spray nozzle ( ) mounted in a hemispherical chamber ( ) in a spray pattern which matches an area of an upper end ( ) of an arrangement of vertical feed tubes of a falling film evaporator. The dissolved gases are liberated quickly from the sprayed droplets and removed through outlets ( ) in the hemispherical chamber. The sprayed droplets collect at the upper ends of the vertical evaporation channels and are distributed evenly thereamong before atmospheric gases can be redissolved.

Method and device for treating water for evaporation

An evaporation product discharged from a lower end a falling-film evaporator enters a downpipe ( ), makes a 180&deg; turn at a bottom of the downpipe, and moves upward through an annular rising channel ( ) defined between the downpipe and an intermediate housing ( ). As the evaporation product moves along a spiral path ( ) defined by the spiral fins, centrifugal forces urges water droplets and impurities to a radial outward periphery where they pass through openings ( ) in the intermediate shell as pure steam continues through the spiral path and out a pure steam outlet ( ). A cooling jacket ( ) chills a peripheral wall of an outer shell ( ) adjacent the holes such that the discharged water droplets condense on the outer shell and flow down a reject water return path to a reject water reservoir at the bottom of the outer shell.

Growing community of inventors

Tuusula, Finland

Mauri Salmisuo