50results about How to "Prevent low temperature" patented technology

The invention is directed to a fuel composition for diesel engines. The fuel composition comprises 0.1-99% by weight of a component or a mixture of components produced from biological raw material originating from plants and/or animals and/or fish. The fuel composition comprises 0-20% of components containing oxygen. Both components are mixed with diesel components based on crude oil and/or fractions from Fischer-Tropsch process.

Gold nanoparticles conjugated to polyethylene glycol and active binding molecules such as antibodies, proteins, lectins and DNA are suspended in a water vehicle at concentration from 10⁷ to 10¹⁵ and then placed in a sealed container such as a centrifuge tube, and then the centrifuge tube is sealed in a film package that is non-air permeable.

The invention discloses an electrochemical polishing electrolyte and polishing method for titanium and a titanium alloy. The electrolyte comprises, by mass percentage, 10%-90% of corrodent, 1%-5% of an additive, 1%-5% of a polynitrogen compound and the balance water. The electrochemical polishing method comprises the following steps of pretreatment, surface oil removal and acid pickling treatment, electrolyte compounding, electrochemical polishing treatment and aftertreatment. The electrochemical polishing electrolyte is simple in formula, stable in performance, long in service life, low in price and capable of being used cyclically for multiple times; reaction conditions such as the low temperature or the relatively high voltage or the large current are not needed; and the electrochemical polishing electrolyte is more suitable for large-scale industrialized production. The surface reflectivity of a finished workpiece obtained through the electrochemical polishing method ranges from 70% to 95%, and surface roughness Ra is smaller than 0.05 micron.

The invention provides an instant electric water heater, which comprises a heater (1), a cool water inlet (2) and a hot water outlet (3) connected to both ends of the heater (1). A branch (4) connected in parallel with the heater (1) is arranged between the cool water inlet (2) and the hot water outlet (3). A solenoid valve (5) is arranged in the parallel branch (4). A signal input end of the solenoid valve (5) for controlling a drive circuit is connected with a temperature sensor (6) for measuring the water temperature in the heater (1). The on/off of the solenoid valve (5) in the parallel branch (4) is controlled through the temperature sensor (6), so that high-temperature water which is heated for a short time in the heater is mixed with cold water in the parallel branch and then the mixed water is discharged when hot water is used again so as to ensure that instant high temperature of outlet water cannot occur.

Disclosed herein is a liquid crystal display device, including: a first substrate; a second substrate; a plurality of spacers disposed between the first substrate and the second substrate; and a liquid crystal layer filled between the first substrate and the second substrate supported by the plurality of spacers; wherein each of the plurality of spacers has a multiple step structure having one or more steps.

The invention discloses a liquid ethane conveying pipeline pressure protection system and method. The system comprises forward pressure relief systems and reverse pressure relief systems which are arranged in parallel on trunk line pumps or valve bypasses. According to the system and the method, the pump or valve front pressure increment caused by action of the pumps or trunk line valves in a liquid ethane pipeline or the isolation section pressure increment caused by temperature rise is automatically released into adjacent upstream and downstream trunk lines by stimulating relief devices arranged on the pumps of the valve bypassed so as to prevent overpressure mediums from entering the atmosphere and limit the highest operating pressure of each pipe section. The system and the method havethe advantages that the water hammer overpressure problem under transient operation of a pipeline can be solved, the influence on the strength of the pipeline due to the volume change caused by influence of the temperature of the mediums after shutdown of the pipeline can be avoided, the overpressure mediums are not discharged from the system after being released, and therefore the investment ofaccessory facilities are reduced, and the safety, environmental protection and energy conservation effects can be achieved.

The invention provides an intelligent thermal-preservation and anti-freezing method for a heat exchanger, which comprises the following procedures: a heat-trace belt in a length got by calculation and experiment(s) is wound on the surface of the heat exchanger in calculated interval, and is adhered on the surface of the heat exchanger by an adhesive tape; a temperature probe is fixed at the middle lower part of the surface of the heat exchanger; 40mm-thick polyurethane is formed on the surface of the heat exchanger, the heat-trace belt and the temperature probe are foamed integrally with the heat exchanger so that they are heat preserved and heat isolated from outside, and the external joints of the heat-trace belt and the temperature probe are reserved; when the temperature probe for the surface of the heat exchanger detects that the temperature is lower than the specified temperature, the temperature control will start the heat trace to carry out temperature compensation; when the probe detects that the temperature is higher than another specified temperature, the temperature control will stop the heat trace. The invention has the advantages of the small footprint, the capability for preventing low environmental temperature, the capability for preventing damage due to freezing caused by temperature drop in the pipeline or joints of the heat exchanger, and the energy saving, etc.

Object: To provide a chocolate or chocolate-like food capable of inhibiting occurrence of low-temperature bloom.

Means for solving problem: A chocolate or chocolate-like food of the present invention comprises an oil and fat, wherein the oil and fat comprises 50 to 85% by weight of triglyceride having an oleic acid at position 2 and saturated fatty acids having 16 or more carbon atoms at positions 1 and 3 (XOX type triglyceride); and 5 to 18% by weight of triglyceride in which two oleic acids are bound and one saturated fatty acid having 16 or more carbon atoms is bound (X02 type triglyceride). According to such a chocolate or chocolate-like food, the low temperature bloom can be inhibited.

The invention provides a preparation method of salbutamol sulfate, and relates to the technical field of chemical synthesis. The preparation method of salbutamol sulfate comprises the following steps: (a) carrying out reaction on salicylic acid and a tert-butyl amino acetyl halogenating reagent under the action of a chlorinating agent to generate an intermediate 1; (b) reacting the intermediate 1 under the action of Lewis acid to generate an intermediate 2; (c) reacting the intermediate 2 under the action of an acid reagent to generate an intermediate 3; (d) reacting the intermediate 3 with a reducing agent under the action of a catalyst to generate salbutamol; and (e) reacting salbutamol with sulfuric acid to generate salbutamol sulfate. The raw materials are simple and easy to obtain, the reaction condition is mild, the reaction operation is simple, the reaction process is easier to control, and the safety coefficient is high; used raw materials, solvents and the like are environment-friendly; and the yield and purity of salbutamol sulfate are high, and a process route capable of industrially producing a product with higher quality is provided.

The invention discloses a cash drawing box based on burning fuming technology, belonging to the technical field of financial safety. The cash drawing box comprises a box body, a burning fuming device,a triggering device and a lockset device, wherein an isolating plate structure is arranged in the box body; the burning fuming device is arranged in the isolating plate structure and is composed of agroove structure, a hole structure, kindling, oxidizer and a control circuit; the triggering device is used for triggering the burning fuming device to work, obtaining a box opening signal or a box closing signal and sending the signal to the lockset device; and the lockset device is used for locking a box cover or releasing the box cover. Through the technical scheme in the invention, the cash safety during the process of circulation can be enhanced, the cash becomes invalid under the condition that the cash drawing box is damaged, and therefore, the cash circulation order is maintained.

The invention discloses a system and method for safe filling after liquid ethane pipeline overhauling. The system comprises a trunk system, a trunk valve chamber system, an ethane filling system and apipeline temperature and pressure detection system, the trunk valve chamber system is responsible for emptying and reopening of upstream and downstream pipelines of a valve chamber and also providesa channel for replacing of a trunk pipeline, and the ethane filling system is used for introducing ethane from an upstream trunk line, heating the ethane for temperature adjustment and then feeding the ethane into a to-be-opened downstream trunk line before the downstream trunk line is reopened. According to the functional demand of reopening of a liquid ethane pipeline after overhauling and releasing, on the basis of the characteristic that the liquid ethane is vaporized under the low pressure to cause the low temperature, by adopting the measures that an upstream pipe section provides a medium filling channel through a valve chamber bypass, an initial-stage filled medium is externally connected with equipment for vaporization heating, and middle-and-later-stage filling, boosting and liquidation are conducted, the problem of low temperature of the medium in the filling process of an isolated and overhauled section of the liquid ethane pipeline is effectively controlled, safe operationof the liquid ethane pipeline is guaranteed, and the effective guarantee is provided for safe operation of the liquid ethane pipeline.

The invention relates to a synthetic method of (S)-1,2,3,4-tetrahydroisoquinoline tert-butyrylamide with high optical purity, comprising the following steps: 1. allowing a quinoline carboxylic acid compound (2) to react with dimethyl carbonate at the temperature of 0-95 DEG C to prepare a N-methyl formate compound (3), wherein, halogeno salt is taken as a catalyst and dimethyl carbonate is taken as solvent; 2. performing aminolysis to the compound (3) by tert-butylamine at the temperature of 20-160 DEG C to prepare a compound (4), wherein, arene or halogenated hydrocarbon inert solvent is adopted; 3. carrying out decarboxylation reaction to the compound (4) by halogenated acid at the temperature of -50-80 DEG C to prepare an amide compound (5), wherein, the mixed solvent of arene or halogenated hydrocarbon and water is adopted; and 4. mixing alkali with sodium hydroxide, extracting, concentrating and crystallizing to obtain a target product. An environmental-friendly and clean raw material of dimethyl carbonate is adopted, highly toxic raw materials such as phosgene and the like are not used so as to avoid reaction with certain danger in case of low temperature, ultralow temperature, hydrogenation and the like. The synthetic method has low raw material cost and is suitable for industrial production.

The invention provides a start-stop AGM battery air tightness detection structure and detection method, and belongs to the technical field of lead-acid storage batteries, the start-stop AGM battery air tightness detection structure comprises a first detection channel and a second detection channel which are arranged in parallel, and the first detection channel is sequentially provided with a first valve, a first air chamber and a second valve; and a third valve, a second air chamber and a fourth valve are sequentially arranged on the second detection channel. According to the start-stop AGM battery air tightness detection structure, the first detection channel and the second detection channel can be independently opened by opening and closing the first valve, the second valve, the third valve and the fourth valve. When the first detection channel is opened, the airtightness of a sealing plug can be detected, including the airtightness of the sealing plug and the airtightness of an upper seal and a lower seal of the sealing plug and the shell. And when the second detection channel is opened, the air tightness of a battery shell and a battery cover can be detected. And the phenomena of performance reduction of battery capacity, low temperature, service life and the like caused by poor sealing of the areas are avoided.