44results about How to "Reduce steam pressure" patented technology

A water level sensor (91) is provided in an auxiliary tank (39) whose bottom portion communicates to a bottom portion of a pot (41) for generating steam and which is opened to the atmosphere. When water in the pot (41) keeps boiling and the stop time of a pump (35) reaches a predetermined time (e.g., 60 sec.), the pump (35) is driven for a predetermined time (e.g., 6 sec.) to supply water to the pot (41). This temporarily suppresses the boiling of water in the pot (41), lowering a steam pressure in a space formed by an external circulation passage (60), a heating chamber, and the pot (41). The water level in the auxiliary tank (39) then returns to a normal one, making it possible to correctly detect the water level in the pot (41).

A sterilization challenge specimen holder is used with a test indicator to challenge sterilization on a consistent basis. The holder includes a body having an internal chamber region and a sleeve positionable within the internal chamber. A cap is sealable on the holder and a plug is positioned in the body. The plug has a wall having a spiral formed groove therein in communication with the internal chamber region. An opening in the holder provides for a flow path for communication between the environs and the internal chamber, and another opening(s) provides for a second flow path for communication between the internal chamber and the inner chamber of the sleeve. An indicator tube carries a biological indicator and has openings therein.

A sterilization challenge specimen holder is used with a test indicator to challenge sterilization on a consistent basis. The holder includes a body having an internal chamber region. A cap is sealable on the holder. A plug is positioned in the body. The plug has a wall having a spiral formed groove therein in communication with the internal chamber region. An opening provides for a single flow path for communication between the environs and the internal chamber via the groove.

A sterilization challenge specimen holder is used with a test indicator to challenge sterilization on a consistent basis. The holder includes a body having an internal chamber region. A cap is sealable on the holder. A plug is positioned in the body. The plug has a wall having a spiral formed groove therein in communication with the internal chamber region. An opening provides for a single flow path for communication between the environs and the internal chamber via the groove.

A sterilization challenge specimen holder is used with a test indicator to challenge sterilization on a consistent basis. The holder includes a body having an internal chamber region and a sleeve positionable within the internal chamber. A cap is sealable on the holder and a plug is positioned in the body. The plug has a wall having a spiral formed groove therein in communication with the internal chamber region. An opening in the holder provides for a flow path for communication between the environs and the internal chamber, and another opening(s) provides for a second flow path for communication between the internal chamber and the inner chamber of the sleeve. An indicator tube carries a biological indicator and has openings therein.

A sterilization challenge specimen holder is used with a test indicator to challenge sterilization on a consistent basis. The holder includes a body having an internal chamber region. A cap is sealable on the holder. A plug is positioned in the body. The plug has a wall having a spiral formed groove therein in communication with the internal chamber region. An opening provides for a single flow path for communication between the environs and the internal chamber via the groove.

A sterilization challenge specimen holder is used with a test indicator to challenge sterilization on a consistent basis. The holder includes a body having an internal chamber region. A cap is sealable on the holder. A plug is positioned in the body. The plug has a wall having a spiral formed groove therein in communication with the internal chamber region. An opening provides for a single flow path for communication between the environs and the internal chamber via the groove.

A method for manufacturing a creped fiber web is provided and includes providing a rotating cylindrical dryer surface, providing a creping adhesive composition or coating package having a pH boosted at least 0.5 pH units relative to its original base formulation pH in the range of from about 4.5 to about 9, for chemically setting a crosslinkable polymer component at least in part before applying the creping adhesive composition to the rotating cylindrical dryer surface to provide an adhesive dryer surface on which a fiber web can be transferred, dried, and creped.

A sterilization challenge specimen holder is used with a test indicator to challenge sterilization on a consistent basis. The holder includes a body having an internal chamber region. A cap is sealable on the holder. An opening is defined in the body or cap that forms a single tortuous ingress and egress path communicating the interior chamber with the environs. An insulating layer is disposed over the body and cap to fully insulate the body and cap other than over the opening so as to not interfere with the ingress and egress path. The insulating layer reduces the heat transference from the environs to the interior chamber region.

The invention discloses a preparation method of plywood. The preparation method is characterized in that the preparation method comprises the following steps: a) a continuous plywood blank formed by a continuous transverse veneer band and continuous longitudinal veneer band assembly and an adhesive enters a preheating and pressurizing unit and is subjected to preheating and pressurizing treatment simultaneously; b) after the preheating and pressurizing treatment, the plywood blank enters a heating and pressurizing unit from the preheating and pressurizing unit and is subjected to heating and pressurizing treatment; and c) the plywood blank subjected to the heating and pressurizing treatment enters a cooling and pressurizing unit from the heating and pressurizing unit through the conveying of a steel band conveying unit, and is subjected to thickness-fixed forming. According to the preparation method of the plywood, the plywood blank is made into the finished plywood by one step, so that a production cycle is short and the plywood production efficiency is high; and the finished plywood produced after the plywood blank is subjected to the three stages, namely, the preheating and pressurizing treatment, the heating and pressurizing treatment and the cooling thickness-fixed forming is stable and reliable in quality and durable in use.

The invention discloses a high strength sprayed concrete for high ground temperature tunnels and a preparation method thereof. The concrete comprises following raw materials: cement, fly ash, slag powder, sand, coarse aggregate, glass beads, PVA fibers, steel fibers, modified rubber, a water reducer, a setting accelerator, and water. Low melting point water-soluble PVA fibers are adopted, after concrete reaches the melting point of the PVA fibers, fibers are melted, tunnels are formed, thus water steam in the concrete can be conveniently dissipated through the tunnels, the steam pressure in the concrete is reduced, the risk of bursting is reduced, at the same time, the melted water-soluble PVA fibers can largely enhance the inner cohesive force of concrete, and the cracking of a cement face is avoided. Through the cooperation of all raw materials, the prepared concrete has the characteristics of low heat conductivity coefficient, good anti-permeability, high interfacial bond strength,and little long-term strength loss. The long-term strength of concrete after spraying is largely improved. The cracking of high ground temperature concrete is avoided.

The invention provides a spray evaporation cooling hot press which can shorten cooling time, improve productivity and effectively prevent a plate from being cracked and is used for producing a single-sided compressed wooden plate. The spray evaporation cooling hot press comprises upper and lower hot pressing plates, wherein a steam channel, a steam outlet communicated with the steam channel, a heating device and a cooling channel are formed in the lower hot pressing plate. The invention also provides the single-sided compressed wooden plate which can be more practical and by which the utilization rate of wood is improved, and a production method thereof. The production method comprises the following steps of: putting a plate blank between the two hot pressing plates, heating the lower hot pressing plate to a certain temperature, moving the lower hot pressing plate relative to the upper hot pressing plate to press the plate blank, spraying steam with 5 to 8 atmospheric pressures into the steam channel for 5 to 10 seconds, stopping heating the lower hot pressing plate when the compression ratio of the plate blank meets the requirement, introducing a cooling medium into the cooling channel, cooling the lower hot pressing plate, and releasing pressure.

Nano metal fluid with high heat transfer performance, it relates to a cooling flow working medium for ultra-high power density radiators, especially a kind of fluid suitable for high heat flux conditions such as computer chips and reactors, which require high-intensity heat exchange And the cooling fluid working medium used in the cooling environment. The invention is a fluid with liquid metal as solvent and nano particles as solute. The invention solves the problems that the current metal fluid is used as the cooling working medium, the price is too high, the cooling performance of the conventional metal fluid is limited, the ordinary fluid is used as the coolant, which is easy to cause leakage, and the existing nano coolant is easy to deposit.

The invention discloses a pretreatment method of cellulosic ethanol raw materials. The pretreatment method is characterized in comprising following steps: step 1, cellulose raw material is delivered into a screw feeder (20) for squeeze dehydration so as to remove at least a part of water of the cellulose raw material and obtain a compact product, wherein dry substance content of the compact product accounts for 20 to 50wt%; step 2, the compact product is delivered into a first-stage steam receiver (30), and is scattered, and the scattered cellulose raw material is subjected to first-stage steam treatment, wherein pH value of steam in the first-stage steam receiver (30) is lower than 7; and step 3, the cellulose raw material processed via first-stage steam treatment is delivered into a second-stage steam receiver (40) for second-stage steam treatment. The pretreatment method is used for pretreatment of cellulose raw material so as to reduce energy consumption; and the amount of inhibition substances generated when the cellulose raw material is subjected to steam treatment can be reduced; and recovery rate of cellulose and recovery rate of hemicellulose are increased.