Through simulating the influence of various ratio of primary and secondary air,position of upperlevel secondary air,coefficient of excess air,upon furnace temperature of the CFB boiler,and distribution of SO_2 and NO_x emission,the reasonable optimality of operational parameters has been analysed,providing remedial basis for optimizing operation of 440 t/h CFB boilers.

The application of PLC and DCS system are introduced in the regeneration reheating fur-nace of the medium section plant of Acheng Iron and Steel Co. Ltd,the construction and characteristic of the system are describedt,he automatic control process of the change-over process,furnace chamber pressure and furnace chamber temperature etc are ex-plained for the regeneration reheating furnace.

It was discovered that there were no effluence on the furnace chamber temperature after the mud was added through a series of experiments. It was also discovered that the combustion efficiency were decreased,the flue gas concentration and the SO2 concentration were decreased with the increase of the mud ratio.

When burning ethylene on bubbling fluidized bed, conversion rates are over 95% under 600℃ and 700℃ as chamber temperature and the air flow rate is 30 m~3.h~(-1). 700℃ is better;

Test on the MSW was conducted in a 1 t/day direct gasification & melting incinerator. The process of direct gasification & melting MSW incineration was analyzed, and combustion efficiency, chamber temperature distributing and the emissions influencing factors of NOx, HCl and SO2 were studied.

The author of this paper analyzes the problems of much scaling on the surface of furnace tube and ultrahigh temperature in the chamber during the long-period operation of atmospheric-vacumm heating furnace with vacumm heavy oil as its fuel,and points out that the application of LCZ ash clueaning agent for descaling can effectively reduce the chamber temperature and cut the cost.

The system allows the best state in the boiler burning, depending on the hearth temperature, the hearth press condition, and controlling the wind quantity of the air-blower and air - introduced machine.

while the data of those when combusting black liquor CWS were 45%～80% and 1.7～3.0 mg/m3 respectively. The hearth temperature and the element of CWS were two factors of emission fluorine when burning CWS.

for the steam pressures controlling, we adopt PT uzzy bunchgrade controlling system of using hearth temperature as assistantcontrol parameter and steam pressure as main control parameter.

regarding existing problems of poor distribution homogeneity of hearth temperature field and low accuracy of COT control during Daqing ethylene8 # cracking furnace operation,improvements of automatic control system and burning system were undertak-en,operation result shows the improvements are successful,not only can provide referencing experience for improving domestic fab-ricated cracking furnace and other similar types of furnaces,but also can provide new technology support for cracking furnace to real-ize less invested,more produced,and save energy as well as lower consumption.

Empirical correlation of heat transfer coefficient was suggested after calculating the two key parameters, solids suspension density and furnace temperature.

Application study of complex control algorithm for regenerative furnace temperature

On this basis, fuzzy control strategy is used for the furnace temperature control.

By this way, the difficulty of online measurement of the furnace temperature is solved, the fault ratios during combustion process is decreased, the steady control of the furnace temperature is achieved, and the gas consumption is reduced.

As a result, it was found that the formation of higher fullerenes requires higher furnace temperature, presumably because of the presence of higher reaction barriers prior to the accomplishment of the fullerene cage.

The critical furnace chamber temperature (T'ign) of the thermal explosion synthesis reaction Ti+3Al→TiAl3 is studied by isothermal and non-isothermal DSC.

The rate of fixation of all samples in any fixation stage were reduced when the blocks were fixed under lower humidity conditions in spite of no change in chamber temperature.

Following establishment, the plants were initially acclimated for 6?weeks in a growth chamber and then stressed in a low temperature freezer from which they were removed over a range of temperatures as the chamber temperature was lowered 1.3°C?h-1.

If the hyperthermia was prevented, however, by initially placing the rats in a cold room (10°C) and subsequently testing for brain stimulation under a cool chamber temperature (14-16°C), the rats responding for brain stimulation was facilitated.

Ambient (chamber) temperature at which the measurements were made ranged from 10.8 to 41.1°C.

Oxygen consumption was also significantly reduced when the piglets were placed on a straw floor, were supplied with radiant heat and when the floor temperature was raised independently of chamber temperature.

In this paper the input data required for the mathematical models of radiative heat transfer by means of Monte-Carlo and zone method of analysis are described. The mathematical model for combustion of pulverized coal presented by field et al. is adopted and is represented by a system of first-order non-linear ordinary differential equations, the numeral solution of which is also given here. The " projection theory " is used to evaluate the absorption coefficients of char and ash particles. Details of calculation...

In this paper the input data required for the mathematical models of radiative heat transfer by means of Monte-Carlo and zone method of analysis are described. The mathematical model for combustion of pulverized coal presented by field et al. is adopted and is represented by a system of first-order non-linear ordinary differential equations, the numeral solution of which is also given here. The " projection theory " is used to evaluate the absorption coefficients of char and ash particles. Details of calculation are given together with a computer program in Fortran by means of which a three dimensional distribution of heat-release rate due to combustion of pulverized coal and radiative properties of the media is obtained. A quantitative analysis of the sensitivity of the various parameters is made. The present program has been used in conjunction with the Monte-Carlo program of radiative heat transfer to predict the heat flux and temperature distribution in the furnace of a 200 MW utility boiler.

In this paper, Monte-Carlo Method is used for the calculation of heat transfer in the radiation chamber of a crude oil cylindrical tubular heater with multiple burners. Soave model is used for the calculation of phase equilibrium of the crude oil containing water flowing tnrough the radiation tubes. The flow of combustion gas in the radiation chamber is assumed to be piston type. The calculation results are compared with operation data. The relative errors are as follows: effective heat capacity of the radiation...

In this paper, Monte-Carlo Method is used for the calculation of heat transfer in the radiation chamber of a crude oil cylindrical tubular heater with multiple burners. Soave model is used for the calculation of phase equilibrium of the crude oil containing water flowing tnrough the radiation tubes. The flow of combustion gas in the radiation chamber is assumed to be piston type. The calculation results are compared with operation data. The relative errors are as follows: effective heat capacity of the radiation chamber 2.1%, average heat flux of the radiation tubes 7.5%, flow gas temperature at the top of the chamber 7.8%, evaporation fraction of the crude oil 14.8%, and the inlet pressure of crude oil 25%.

This paper intrduces a control system designed for the 2.8 Mwt circulating fluid bed boiler, the control strategy used by this system is that the coal feed is determined bY the boiler load, the blown air valve is adjusted to control the combustion temperture and drawn air valve is adjusted to contiol the combustion tube pressure In the control algerithms, aPID algerithm with ployspeed integration and a nonliner premerary and tecondary aii ratio algerthm are used.