34results about How to "Avoid excessive dehydration" patented technology

The invention discloses a low-temperature start control method for a fuel cell system. The low-temperature start control method comprises parking control and start control. According to the invention, when parking control is carried out, a fuel cell is kept in relatively high reaction gas supply quantity; therefore, a role of blowing is played; residual liquid water in the fuel cell can be removed; simultaneously, the fuel cell is kept in relatively low intermittent loading current; intermittent water supply to a proton exchange membrane of the fuel cell can be carried out, such that the excessive water loss condition of the proton exchange membrane is prevented; when the fuel cell system is started, the fuel cell releases heat to increase the temperature by utilizing self reaction; an extra auxiliary energy is unnecessary to heat; furthermore, loading start is carried out by adopting the starting condition and the current density corresponding to a parking post-treatment process; the low-temperature start process of the fuel cell system can be successfully implemented; due to the invention, the fuel cell can be controlled in a proper state after parking in a low-temperature temperature; and furthermore, the fuel cell system can be rapidly started again in the state in the low-temperature temperature.

A nozzle device (1) comprises a plurality of multi-fluid nozzles (5) and a body (2) with a bore (8). The bore (8) has a laser entrance (82) and a laser exit (81). The nozzle device (1) is adapted to be mounted to a laser medical device such that a laser beam generated by the laser medical device enters the laser entrance (82) of the bore (8) of the body (2) and exits the laser exit (81) of the bore (8) of the body (2). The body (2) houses the multi-fluid nozzles (5) and the multi-fluid nozzles (5) are arranged around the laser exit (81) of the bore (8) of the body (2). The nozzle device (1) allows to conditioning a tissue at and near where it is cut or drilled by the laser beam of the laser medical device. Thus, the nozzle device (1) is particularly suitable for a laser osteotomic device allowing to minimize collateral damages of the tissue when being cut or drilled.

The present invention relates to one kind of combined rolling press grinding apparatus, and belongs to the field of inorganic non-metal material grinding technology. The combined rolling press grinding apparatus includes one dispensing mechanism, one lifting and conveying mechanism, one rolling press, one ball mill, one powder concentrator, one dust collector and one fan. The present invention has the advantages of low milling loss, simple structure, several operation mode, high grinding efficiency, low power consumption, etc.

The invention belongs to the technical field of specimen processing, and in particular relates to a preservation fixative for pathological tissue. The preservation fixative for pathological tissue according to the present invention (expressed in parts by mass) is composed of the following components: 10-15 parts of furfural, 8-12 parts of hydroxyl compounds, 4-6 parts of mannitol extract, 6- parts of alliin 10 parts, 6-8 parts of trimethylglycine, 1-3 parts of carbonyl-4, 4-diisoidene-fatty alcohol-phosphate chelate polymer, and 50-60 parts of water. The preservation fixative does not contain formaldehyde and ethanol, does not need to be replaced, is non-toxic, and has no impact on the working environment; the preservation effect of the specimen is good, the bacteriostatic effect is remarkable, it is not mildewed, does not shrink, the color is natural, the tissue is flexible and moist; at the same time, The properties are stable, and the specimens are stored for 6 months at 40℃. The specimens are free of mold spots and rancidity. The preservation solution is clear.

Provided is a kitchen waste split-phase energy generating device. An outlet of a heat conduction oil pipeline of a steam self-rotating damp and heat pre-treatment device is connected with a three-phase heat preserving device. A steam outlet is connected with a heat accumulator. After damp and heat pre-treatment ends, heat conduction oil and high-temperature waste heat of steam are recycled and stored in a three-phase heat exchanging and heat preserving unit. A bottom discharge port of the damp and heat pre-treatment device is connected with a screw-folded dehydrator so that solid and liquid separation can be performed. Kitchen waste on which damp and heat pre-treatment is performed enters a liquid-phase material fermentation tank to generate hydrogen through solid and liquid separated liquid phases; a solid-phase material fermentation tank is connected with an adjusting tank, and solid materials passing the screw-folded dehydrator enters the solid-phase material fermentation tank to generate methane through a conveying pump after parameter adjustment is performed. Heating coils of a liquid-phase fermentation tank and a solid-phase fermentation tank of an anaerobic fermentation unit are connected with the heat accumulator of the three-phase heat exchanging heat preserving unit, and heat preservation is performed on an anaerobic fermentation tank through a temperature-control electromagnetic valve. The kitchen waste split-phase energy generating device can achieve the split-phase energy generation of hydrogen and methane gas cogeneration of the kitchen waste and achieve the optimum energy conversion efficiency.

A homogeneous deoiling integrated steam spin wet heat pretreatment device mainly includes: a cylindrical pretreatment reaction tank, a temperature control oil guide pipe is arranged between the inner wall and the outer wall of the pretreatment tank, and the temperature control oil guide The tube is filled with heat conduction oil, the temperature control oil guide tube is in contact with the inner wall of the tank, and the space between the temperature control oil guide tube and the outer wall of the tank is filled with thermal insulation material, the top cover of the tank body is equipped with a feed port, and the bottom of the tank body is provided with a discharge port ;The tank body of the pretreatment tank is equipped with spirally arranged steam coils, and the inner side and the tail of the steam coils are provided with steam nozzles. The curvature radius of the steam nozzles is equal to the circle radius of the steam coils. The included angle of the circle tangent is between 5° and 10°; the upper part of the pretreatment reaction tank is equipped with a tubular oil remover, and the oil guide port of the oil remover is equipped with a peristaltic pump to suck out the scraped grease and transfer it to the waste oil recycle bin. The invention also discloses a method for pretreating kitchen waste by using the device.

The invention discloses a method for synthesizing terpene diol from turpentine and preparing terpineol and acetate. Add turpentine, water, phosphoric acid, α-hydroxy acid, co-catalyst and emulsifier into a reaction kettle, start stirring, and react to obtain Synthetic product; the synthetic product is statically crystallized, filtered to obtain hydrated terpene diol crystals, the filtrate is allowed to stand for stratification, and the upper layer is oil containing hydration products; the above-mentioned terpene diol crystals are added to a dehydration reaction kettle and water is added, stirred and heated, react to obtain the crude terpineol product; add the above-mentioned terpene diol crystals into the esterification reaction kettle, add acetic anhydride, stir, and heat up to react to obtain the crude acetate product; use the crude terpineol product or ethyl ester product Neutralize in lime water, wash with water, and fractionate the product after washing under reduced pressure to obtain refined terpineol or acetate product. The method of the invention has the advantages of simple process, less discharge of three wastes, mild reaction conditions, high yield of terpineol, and better social, ecological and economic benefits.