SU1198035A1 - Method of automatic control for operation of rotary furnace heat exchanger outfitted with decarbonization device - Google Patents

Abstract

METHOD OF ABTCftIATH4ECKOro REGULATION OF WORK OF REFRIGERATOR HEAT EXCHANGER. TABLES, EQUIPPED-. GO DECARBONIZER, which includes measurement of fuel consumption in the calciner and consumption of the raw mix at the inlet of the baked heat exchanger, which means that, in order to regulate the quality of the regulation, the degree of decarbonization of the raw mix at the output of the calciner, the calorific value of the fuel and the thermal effect of the decarbonization reaction, calculate the current volume with waste gases using the formula fuel),) where G is the current waste gas with waste gases; G is the flow rate of the mixture at the inlet of the baked heat exchanger; fuel consumption in decarbonium, congestion; - the degree of decarbonization of the raw mix at the outlet of the decarbonating bonster; (L Cf, is the concentration of the carbonate component in the raw material mixture at the inlet of the roaster's heat exchanger; -uW heating value of TOPA, fuel; -lN heat effect of the carbonization reaction, from 00 and change the flow of exhaust gases, about and reduce the consumption of waste at negative difference between the calculated current piešunos with flue gases and its specified value and increase the flow of the flue gases at a positive difference.

Description

The invention relates to the production of building materials and can be used in the cement industry, and more specifically to automatically control the operation of a rotary kiln heat exchanger equipped with a calciner.

The purpose of the invention is to improve the quality of regulation.

The drawing shows a device that implements a method for automating control of the operation of a rotary kiln baked heat exchanger equipped with a calciner.

The essence of the method is as follows.

The current dust content of the waste gases is established through the allowable dust discharge with waste gases, and the current dust discharge with waste gases is calculated using the formula

g - topl topl).

pCcl -uHje,);)

where G is the current dust discharge with waste gases; Gg - raw material consumption per

the inlet of the furnace heat exchanger;

QfonA. decarboni fuel consumption;

P is the degree of decarbonization of the raw mixture at the outlet of the calciner;

C is the concentration of the carbonate component in the raw mix at the inlet of the baked heat exchanger; - calorific value

fuel;

 thermal effect of the reaction of de ,, - carbonization.

Let us denote the following components of the control of the current chick with the exhaust gases:

)

topl

. (

 ek))

- the amount of heat that is given during the combustion of fuel in the calciner raw mixture;

the amount of heat spent on decarbonization units of the raw mix.

980352

Consequently, the ratio of A and B will be the consumption of the raw mix at the outlet of the baked heat exchanger, i.e. current pyelones with waste 5 gases

 J

which is fair.

Raw mix consumption

10 baking heat exchanger can not be measured due to high temperature (up to). Therefore, the consumption of the raw material mixture in the decoder heat exchanger is determined by indirect

15 parameters.

Thus, the current dust extraction is determined by indirect parameters, which allows you to automatically adjust the operation of the furnace heat exchanger.

A 20 rotary kiln equipped with a calciner, which in the proposed method is achieved by calculating the difference between the permissible dust content and the current and with a negative difference

25 the waste gas consumption is reduced, and with a positive difference it increases. .

The method is carried out as follows. .

30 As an example, we take the process line of a cement plant, the fuel consumption for which in decar. about 10 t / h of bonsification, about 190 t / h of feed mixture entering the baking heat exchanger, about 90% decarbonization. about 90% of the calciner output, about 6Q% carbonate component in the mixture, and fuel calorific value

40 and the thermal effect of the decarbonization reaction is respectively 7000 kcal / kg and 700 kcal / kg.

Allowed dust exhaust with waste gases accepted 5 t / h.

45 With an increase in the degree of decarbonization at the exit of the decarbonisagor by 3% and constant fuel consumption in the decarbonier, the concentration of the carbonate component in the mixture at the inlet

50 in the baking heat exchanger, the consumption of the raw material mixture at the outlet of the baked heat exchanger is about 176 t / h, i.e. decreases by 9 tons per hour, and therefore, with a constant flow of the raw material mixture at the entrance to the baking heat exchanger, the current dust discharge with exhaust gases increases by 9 tons per hour. As a result,

Claims (1)

(• 54) (57) METHOD FOR AUTOMATIC REGULATION OF THE OPERATION OF A BAKING HEAT EXCHANGER WITH A ROTARY FURNACE FITTED WITH A DECARBONIZER, which includes measuring the fuel consumption in the decarbonizer and the flow rate of the raw material mixture at the inlet of the baking heat exchanger, so that the quality is increased so that - measure the concentration of the carbonate component in the feed mixture at the inlet of the baking heat exchanger, the degree of decarbonization of the feed mixture at the outlet of the decarbonizer, the calorific value of the fuel and the thermal effect of the dec bonizatsii, calculate the current dust discharge with the off-gases from the formula ^ fuels (~ dh _fuels.) rfle'G _n - current dust discharge waste \-gases; G ₀ - consumption of the raw material mixture at the inlet of the baking heat exchanger; G _TonA ~ fuel consumption in the decarbonizer; P 'is the degree of decarbonization of the raw material mixture at the output of the decarbonizer; C _c is the concentration of the carbonate component in the raw material mixture at the inlet of the baking heat exchanger; ' ^th ^ hopl. ~ calorific value of fuel; ~ iM ^ _ek is the thermal effect of the decarbonization reaction, and the flow rate of the exhaust gases is changed, and the flow rate of the exhaust gases is reduced with a negative difference between the calculated current dust collector with the exhaust gases and its predetermined value, and the flow rate of the * exhaust gases is increased at a positive difference.