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106results about How to "Reduce elevation" patented technology

Standpipe distributor for short time contact of hydrocarbon compounds with particles

An arrangement for the controlled production of an essentially linear array of hydrocarbon feed injection jets reduces required clearances and elevation while facilitating modification of the contacting locating a feed distributor containing a linear array of jets at a standpipe junction point to provide choke point for particle flow control. The flow properties of the extended particle layer are controlled by adjusting the density of the particles above the choke point created by the upper part of the standpipe inside diameter and the top of the distributor. Steam or another fluidization medium may be added to the particles directly above the distributor for this purpose. This invention can also modify the particle or feed injection characteristics by changing the projection of the distributor into the standpipe to adjust the flow area over the choke point and by the use of bottom slides or baffles to change the flow area size and configuration. Location of the distributor at a standpipe junction will also typically allow the placement of the distributor at a lower location in the process which eliminates the need to add vessel height for supplying pressure drop for the particle discharge point. The distributor arrangement also fits compactly into most common standpipe junctions. Thus, the arrangement of this invention solves the problem of inserting an extended array of feed injection points into a fluidized particle contacting process without providing a large amount of clearance or additional vessel height.
Owner:UOP LLC

Control method and control device of freezing pump after refrigerator closing down and central air conditioner system

The invention provides a control method and control device of a freezing pump after refrigerator closing down and a central air conditioner system. During refrigerator closing down, the water supply temperature, the water returning temperature and the freezing water flow of freezing water in a freezing water system are collected so as to obtain the remaining cold amount of a freezing water system, the water supply temperature and the water returning temperature of the freezing water are collected at the first moment after closing down, the energy conservation is used for enabling the cold amount at the front moment and the cold amount at the rear moment to be equal, the freezing water flow at the first moment is calculated, according to the freezing water flow, the freezing pump at the first moment is controlled to run in a frequency-converting manner, the freezing water flow at the second moment is obtained, the freezing pump is controlled to run in a frequency-converting manner, the freezing water flow of the next moment is repeatedly obtained, and the frequency converting running of the freezing pump is controlled until the water supply and returning temperature difference of freezing water is smaller than 1 DEG C. According to the method, through control over frequency-converting running of the freezing pump, the remaining cold amount in the freezing water system is continuously subject to heat exchange with the indoor environment, temperature rise in a room slows down, and the energy consumption is reduced.
Owner:SHENZHEN DAS INTELLITECH CO LTD

Non-fuel medium quenching process for casting grinding ball and casting grinding section

The invention relates to a non-fuel medium quenching process for a casting grinding ball and a casting grinding section, comprising the following operation steps of: firstly, preparing water-soluble quenching liquid with concentration of 10-25 percent, wherein the temperature of the quenching liquid is controlled to be 10-90DEG C; secondly, feeding the casting grinding ball and the casting grinding section in a quenching basket and then in a heating furnace, heating until the quenching temperature is 930-1,150DEG C, discharging from the furnace and uniformly spreading in a movable quenching cradle; thirdly, immersing the movable quenching cradle in the water-soluble quenching liquid of a quenching pond and quenching for 5-10 minutes; and fourthly, when the surface temperature of the casting grinding ball and the casting grinding section is reduced to be 250-350DEG C, finishing quenching operation. By using the process disclosed by the invention, various technical indexes of the casting grinding ball and the casting grinding section are respectively higher than those of current national standard and industrial standard. The quenching hardness is stabilized between 62 and 66HRc (Rockwell hardness) and the difference between the center and the surface hardness is smaller than 1.5HRc. The grinding ball and the grinding section treated by adopting the process disclosed by the invention not only have stable quality and remarkably-reduced cost. Meanwhile, the potential safety hazard of production fields and the pollution to the environment are avoided.
Owner:ANHUI FENGXING WEAR RESISTANT MATERIALS CO LTD

Injection of fructose-1,6-diphosphate (FDP) prior to coronary artery bypass grafting surgery

Fructose-1,6-diphosphate (FDP) is used to treat patients who are undergoing coronary artery bypass grafting (CABG) surgery. Before cardiopulmonary bypass begins, a liquid that contains FDP is intravenously infused in the patient, preferably for about 10 to 30 minutes, to allow the FDP to enter the heart and lung tissue while the heart is still beating. FDP can also be added to cardioplegia solution; in addition, FDP can be injected after bypass is terminated, but if post-bypass injection is used, steps should be taken to avoid excess lactic acid accumulation, which appears to increase the risk of atrial fibrillation. To prevent or control lactic acidosis, a buffering or alkalizing agent, such as sodium bicarbonate, or an agent which reduces lactic acid formation, such as dichloroacetate, can be used. In double-blinded trials, this use of FDP substantially reduced heart damage and improved overall outcomes, as shown by lower levels of creatine kinase in blood, improvements in pumping performance, reduced requirements for vasodilator and inotropic drugs, and shorter stays in intensive care units. Certain dosages also reduced the likelihood of atrial fibrillation; however, FDP at high dosages increased the likelihood of A-fib. FDP also helped reduce pulmonary vascular resistance (PVR); this is an important finding, since pulmonary hypertension following cardiopulmonary bypass is a very difficult and often intractable problem, and is a contributing factor in nearly all deaths following CPB surgery.
Owner:QUESTCOR PHARMA

Air flue assembly and refrigerator

The invention provides an air flue assembly which comprises an air flue shell and a cold accumulation box. The air flue shell is provided with a chamber air supply opening, and an air flue is formed by the air flue shell and an inner container of a refrigerator, wherein the cold accumulation box is installed in the air flue. According to the technical scheme, the cold accumulation box is embedded in the air flue, on one hand, the volume of a refrigerator chamber can be prevented from being occupied by the cold accumulation box, and the use experience of a user is improved; and on the other hand, when the refrigerator runs, cold air generated by the refrigerator passes through the cold accumulation box in the air flue firstly before entering the refrigerator chamber, and part of cooling capacity of the cold air is stored through the cold accumulation box, so that the temperature of the cold air entering the refrigerator chamber is increased. When the refrigerator shuts down, the cold capacity in the cold accumulation box can be properly released into the refrigerator chamber according to the temperature in the refrigerator chamber, and increasing of the temperature in the refrigerator chamber can be slowed accordingly. Thus, the fluctuation of the temperature in the refrigerator chamber can be effectively reduced, and the freshness preservation and storage effects of the refrigerator are improved.
Owner:HEFEI HUALING CO LTD +1
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