Washed suspensions of Escherichia coli were exposed to different concentrations of chlorine dioxide at various temperatures. Platings of the mixtures to evaluate the numbers of surviving cells were made after 5–300 sec of contact. Survival data were best fitted by a reaction model that is first order with respect to cell concentration and to exposure time. Bactericidal rates were found to increase markedly with both increased disinfectant concentrations and increased temperatures. Activation energies at each concentration of chlorine dioxide are reported. The Oil & Gas Industry Disinfection Chlorine Dioxide Generator For Oil Gas, Oilfield Injection Water Treatment, Cooling Water Sterilization, Mining Water Disinfection Nanjing Ligong Shuifu Environmental Protection Technology Co.,Ltd. , http://www.watermanclo2.com
/*728*90 created on 2018/5/16*/ var cpro_id = "u3440131"; Home>Bearing knowledge> Common equipment for bearing ring casting (2) Common equipment for bearing ring casting (2)
(1) Semi-gas furnace coal is incompletely incinerated in a semi-gas explosion furnace (incompletely incinerated product containing hot gas and coal fraction) is sent from the gas incineration port to the heating chamber; air is mixed with it during the feeding process. Incinerate. /*250*250 was created on 2017/12/25*/ var cpro_id = 'u3171089';
Its layout is simple; the thermal efficiency is higher than that of the reverberatory furnace; the working conditions are much better than that of the reverberatory furnace; but the quality of coal is high; it is not suitable for coal that is easy to slagging.
(2) There are many ways to arrange gas stoves for gas stoves; most of the commonly used small and medium-sized gas stoves are mobile exhausts. The process of incineration is that gas and air are well mixed in the incineration equipment; Incineration; the smoke from incineration is discharged upward from the flue adjacent to the discharge port.
It has a series of advantages such as high thermal efficiency, simple furnace type, convenient operation and good sanitary conditions.
(3) The layout of the oil furnace type is basically the same as that of the gas furnace; only the incineration equipment is different. It is more economical to use heavy oil as fuel; there is also the use of diesel oil. The oil furnace has high thermal efficiency; the working conditions and sanitary conditions are better than the coal stove; the heating speed Fast; good quality.
(4) Induction furnace electric heating equipment is divided into three types: resistance furnace, induction furnace and electric arc furnace.
In bearing casting production; the first choice is induction furnace. The principle is: when the high frequency communication current passes through the induction coil; an induced potential occurs around the coil; under the effect of induced potential; there is current activity in the metal bar; The resistance of the metal itself; the electrical energy is converted into heat to heat the metal bar.
At present, coal stoves are the most widely used; especially small and medium-sized plants; because of low cost; but poor working conditions; low thermal efficiency; therefore, many factories have improved their layout; such as horizontal reciprocating furnaces, etc. It has the advantages of high thermal efficiency, fast heating speed and environmental protection. However, the equipment is invested greatly. The gas furnace heating also has better working conditions than the coal stove heating; the environmental protection is the same; but the gas station construction has a large investment.
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Common equipment for bearing ring casting (2)
Source: Bearing network time: 2017-12-01