Method of continuous material mixing control

专利摘要:
L'invention concerne un procédé de régulation, en continu, du malaxage des pâtes destinées à la fabrication d'agglomérés carbonés, dans un malaxeur muni de dents fixes et d'un arbre, également muni de dents, effectuant un mouvement de rotation combiné avec un mouvement avant-arrière, et comportant également des clapets motorisés contrôlant la sortie de la pâte carbonée. A chaque cycle de rotation de l'arbre, on mesure, par échantillonnage, l'intensité absorbée par le moteur pour certaines positions particulières de l'arbre dans son mouvement avant-arrière, on compare l'intensité à une valeur de consigne éventuellement corrigée en fonction du niveau de cette intensité par rapport à des seuils prédéterminés, et on introduit cette valeur corrigée dans un régulateur qui détermine, à chaque cycle, le degré d'ouverture des clapets de sortie
公开号:SU1329605A3
申请号:SU843781150
申请日:1984-08-02
公开日:1987-08-07
发明作者:Лемаршан Жан-Луи
申请人:Алюминиюм Пешинэ (Фирма)；
IPC主号:

专利说明:

This invention relates to the manufacture of carbonaceous agglomerates from a mixture of carbon grains and an organic binder.
The purpose of the invention is to improve the degree of mixing.
Figure 1 shows a mixer for carrying out the proposed method, a slit; Fig. 2 illustrates the dependence of the current consumed by the motor on time; on fig.Z - the dependence of the value of IV2 on the value of 1A2.
The mixer shown in FIG. consists of a tubular body 1 with fixed teeth 2, mounted obliquely relative to the axis 3 of the body, inside which is a shaft 4, driven in a reciprocating motion, synchronized with a rotational movement. On the shaft 4 there are teeth 5 that interact with fixed teeth 2 to provide agitation and ejection of the carbonaceous mass. The stationary teeth are arranged in a spiral and the amplitude of the reciprocating movement of the shaft is adjusted according to the interval between the stationary teeth. At the outlet of the mixer there is an outlet 6, closed by mechanical valves 7. The control of opening and closing of these valves can be adjusted depending on the threshold thresholds of instantaneous power in order to ensure satisfactory mass movement and avoid clogging of the mixer, i.e. blocking it during operation due to excessive filling.
The invention is based on an analysis of the operation of the mixer and on the observation of changes in the intensity absorbed by the engine during successive

CYCLES reciprocating 45. It is important, therefore, to regulate the rotation of the shaft (figure 2).
The principle of regulation is as follows. The intensity absorbed by the motor is measured for two positions of the axis of the mixer during its reciprocating motion, as determined by two fixed sensors 8 (Fig.). Two intensity measurements at time points 1V1 and 1V2 are made when the shaft is in the extreme forward position relative to the discharge side of the mixer, and two measurements 1A1 and 1A2 are taken at time points 50
The position of the fixed sensors 8 so that the measurements at times 1A2 and 1V2 coincide with the minimum intensity values.
The main parameter of regulation is the amount of power measured at a point in time, which can be associated with the moment mass leaves the mixer. This gg value is entered into the valve open degree control algorithm as follows. The degree of opening of the valves is changed in accordance with the following relationship:
0
about
when the shaft is in the rearmost position. The intensity change curve for each cycle is presented in 9).
The first measurement 1V1 is carried out at the moment when, when the shaft moves forward, each of the movable teeth practically abuts through the layer of carbon mass to the corresponding fixed teeth, i.e. when the mass is released from the mixer.
The second measurement 1V2 is carried out at the moment when the absorbed intensity passes the first minimum of power corresponding to the beginning of the return movement of the shaft. Due to the rotation of the shaft, the yoke teeth are at this moment, between the fixed teeth. Since at this moment there is no compression of the mass between the movable-1i and the fixed teeth, but only its over- mixing occurs, the force required from the 5th engine (power) somewhat decreases.
The third measurement, IA1, is carried out at the moment when the moving teeth of the shaft, which continues its return movement, begin to compress the carbon mass between themselves and the corresponding fixed teeth located at the back.
Finally, the fourth dimension 1A2 is held at the moment when the power absorbed by the engine passes the second minimum, corresponding to the moment when the shaft again began to move forward in translation and the moving teeth again pass between the fixed teeth.
The two values important for adjustment are the two minimum values at times 1A2 and
0
five
0
0
The position of the fixed sensors 8 so that the measurements at times 1A2 and 1V2 coincide with the minimum intensity values.
The main parameter of regulation is the amount of power measured at a point in time, which can be associated with the moment mass leaves the mixer. This value g is entered into the valve open degree control algorithm as follows. The degree of opening of the valves is changed in accordance with the following relationship:
/. kjc-ij h- (c-ijf k (i:
0 3 where fi is the degree of valve opening,% С is the reference value of the power consumed by the engine; 1 "is the value of the power consumed by the engine at the first minimum when the shaft starts to move from the discharge side of the mixer; n is the cycle number of the reciprocating shaft movement; k, k, k are constant coefficients,
veins to the value 1 and equation (1), which regulates the degree of valve opening.
When 1 becomes greater than C, the adjustment parameter is calculated after adding a certain correction to value I:

ten
and n + (U- CJ
(2)
So, in the case shown in fig. 3, if 1 „465 A 1 240 A, C, 210 A, then i; 495 A.
Thus, it is this great characteristic, 5 rank 495 A (instead of 465 A) that will be sought by equipment to adjust, as a result. At high power values, so that the valves quickly open.
absorbed by the engine, changes in its magnitude at time 1V2 have a smaller amplitude than changes in its value at time 1A2 (Fig. 3), which can be considered as a parameter that determines the level of filling of the mixer. The rapid increase in power at time (A2) is an indicator of the tendency for the mixer to become blocked. This means that at the beginning of the forward movement of the shaft forward, the teeth practically do not find free volumes and that the carbon mass will soon fill almost the entire volume of the mixer. In this case, if you do not interfere with the process, the shaft will be blocked, the security system will turn off the power supply to the engine and for the new start of the mixer you will need to manually remove from the mixer part of the carbon mass heated to approximately 160 ° C.
The use of the continuous adjustment method according to the invention makes it possible to detect an approach to clogging, when the power measured at the time 1A2 exceeds the predetermined, given by
if Cj: I j.
50
(5) (6)
technology threshold C and immediately respond, either open the output valves, or by increasing the mixer rotational speed, or by doing both.
In order to increase the degree of filling in the control system, determined by the magnitude of the power measured at 1A2, during each cycle, the magnitude of the power is compared to the danger of clogging, at 1A2, with the value of opening output valves and / or the decreasing threshold ,, Until then, the speed of the mixer is perceptible. while 1 С, adjusting pair- Corresponding lines (pyramid meter 1 in equation (l) remains ra- ffbie in amperes) of parameter C and pore C ,, then I „+ -t- (Ca-Cj -t-Sdn- ,- WITH,); if C, 1 | ,. Sc, then 1 1 „- (Co-C,) + 3 (C; -C;) h-4 (1, - C,).
If I (7 C, then the parameter is not used. In this case, urgent
veins to the value 1 and equation (1), which regulates the degree of valve opening.
When 1 becomes greater than C, the adjustment parameter is calculated after adding a certain correction to value I:

and n + (U- CJ
(2)
more than they would open at 1,465 A, which will avoid clogging of the mixer. This allows constant and safe operation of the mixer with almost maximum power.
In addition to threshold C, two fixed thresholds C and C are also used, the magnitude of which is greater than C, and with which the magnitude is also constantly compared. .
thirty
25
In the case when code # {other 1 exceeds the first or second C fixed threshold Cj, the difference between and Cj (respectively C Tj) is added x times, for example, three times (respectively, y times, for example, four times to the value 1 calculated by the indicated method in equation (2). Thus, the adjustment parameter I f becomes equal to A:
If 1 С, then i; one ; if C, c xto i; U-t-dv-Cj;
WITH)
if Cj: I j.
(5) (6)
react to the risk of clogging by opening the outlet valves and / or increasing the speed of the mixer. Corresponding values (pyra-ffbie in amperes) of the parameter C and poro C ,, then I „+ -t- (Ca-Cj -t-Sdn -, - С,); if C, 1 | ,. Sc, then 1 1 „- (Co-C,) + 3 (C; -C;) h-4 (1, - C,).
If I (7 C, then the parameter is not used. In this case, urgent
The speeds from .C are determined depending on the type of mixer used and the operating conditions (for example, the composition and temperature of the carbon mass). The same is true of the factors X and I, respectively 3 and 4 in the example above) and with the addition of correction values that are given as examples.
The adjusting device, pea-- lysu1; all the proposed method, BCTDO- in a programmable machine, allows you to adjust the position of the output valves of the mixer, controlling the output of the carbon mass from the mixer, so as to optimize or bring the output power in kW / h h, per ton of projectiles, without rice: when the mixer is clogged up and when the mixer is turned almost at maximum power.
 In practice, the method is carried out as follows.
Determine the energy value of the mixing of the carbon mass.
kWh
t
water content of the mixer, which, in principle, is equal to the nominal capacity and corresponds to the total coke weight “Binder introduced in the loading part of the mixer; determine the maximum reference value of the intensity of the current feeding the mixer motor; start the mixer and feed a mixture of coke with a binder into it; for each cycle, the measured power values at times of time V1, 1/2, 1A1, 1A2 are measured in this manner; during each cycle compare the value of 11 ,. with the value of C | , as well as with different predefined pores of roBbDui with C, Cj values, if
at
determine the hourly production
 C,, variable adjustment (remains unchanged; if I., C /,
g
variable pei chmtyrsch h: 1, is calculated aFn o u; so lei: i; add to the IP Be.tr4HHr, determined by the ratio between the first and different threshold values C, C, C ,, in the manner indicated by equations 3-6.
Enter the value of the variable adjustment.
i;
algorithm um reg snailing
which adjustable km determines the optimum valve opening pressure.
,
1329605 and
besides, it ensures safety of work.

权利要求:
Claims (2)
[1]
Invention Formula
1. A method of continuously controlling the mixing of a material, mainly intended for the manufacture of carbonaceous agglomerates from a mixture of carbon grains and an organic binder in a mixer, containing a shaft with teeth inclined relative to the axis of the mixer, located in a tubular body with Fixed teeth, consisting of simultaneous rotation and cyclic the reciprocating movement of the shaft and the change in the degree of opening of the valves located on the discharge side of the mixer, differ from each other. In order to improve the degree of mixing, the position of the shaft relative to the body is additionally measured during reciprocating motion. The power consumed by the motor is determined when the shaft is in the extreme position as it moves towards the discharge side of the mixer, the first minimum of power consumed by the motor is determined. the beginning of the movement of the vapa from the discharge side of the mixer, determine the power consumed
engine, when the shaft is in the extreme position when it moves from the discharge side of the mixture -. bodies, determine the value of the second consumed by the engine
power at the beginning of the shaft movement to the discharge side of the mixer and change the degree of opening of the valves depending on the change in the amount of power absorbed by the engine,
compared with the zonalno value.
2. Method POP.1, distinguished by the fact that the degree of opening of the valves varies according to the following relationship:
[2]
50
u kJC-l,) + (C-lJ + k ,,
where | U is the degree of valve opening,%; C is the reference value of the power consumed by the engine; 55 Ifi value of the power consumed by the motor in the first minimum when the shaft starts to move from the discharge side of the mixer;
7
n is the cycle number of the reciprocating shaft movement; ktikj - constant coefficients,
kj determined by the characteristics of the equipment. 3, the method according to claim 2, characterized in that during each cycle of the reciprocating movement of the shaft, the value 1 consumed by the motor in the second minimum at the beginning of the movement of the shaft to the discharge side of the mixer is compared with four thresholds
.C ,, C and in my values depending on the result of the comparison, the change in the value of k ie is made, the corrected value is 1
  U;
C, lu
 with, . with,
with s, I
 in- (IK-C,);
 |, + (Cr- CJ +
329605
 X (1 „- Cj);
with. :
(C, -C,)
I,
(C, - Cj) y (C,),
1 - the amount of power consumed by the engine when the shaft is in the extreme position when it moves from the discharge side of the mixer
- adjustment factors.
4. Method of pop. 1, distinguished by the fact that, when the value of the second minimum of the consumed power is exceeded, when the shaft starts to move to the unloading side of the mixer, the maximum, technology-defined threshold value fully opens the valves and / or increases the speed shaft rotation.
1 amperes
1V1 1V2 1/11 ig.2
1 cycle fex: l3)
Temps en
// 72 secondes
/ T2 amperes
7 / 7f amperes II1
260
280

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US9415529B2|2012-05-08|2016-08-16|Basf Se|Method for operating an apparatus with at least one rotating shaft|

法律状态:

优先权:

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申请号 | 申请日 | 专利标题

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LU85258A|LU85258A1|1984-03-19|1984-03-19|PROCESS FOR THE CONTINUOUS REGULATION OF THE MIXING POWER OF PASTA FOR THE MANUFACTURE OF CARBON AGGLOMERATES|

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