JPS60191186A - Sintering machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION 4. The invention relates to a sintering machine used in the sintering process of iron manufacturing that can more efficiently remove SOx from waste scraps.

Generally, in the sintering process of steelmaking, the sulfur content in the sintering raw material and fuel is liquefied as it is burned, and is discharged as SOx in the slag. It is known that the SOx concentration and discharge temperature pattern reach a significant peak from the middle of the stent of the sintering machine to the downstream side near the first part of the exhaust port, as shown in Figure Q41. In this S Ox tJt output, the power output is performed by one person, or the partial core assembly '6 lBe feeding method is performed by a sintering machine that is set to /1 in the 21st xl.

In this 773 ka concentration 1ifa sulfur power method, the raw ore supply device 3
Then, the sintering raw material is supplied from the bedding ore supplying device 4 to the sintering tower to the machine 1, and the sintering raw material is fed to the pallet (not shown) of the sintering machine 1.
sintered while continuously moving with the metal.

Exhaust gas during sintering is suctioned and extracted from each wind box 5, 5, etc. arranged in parallel in the longitudinal direction of the sintering machine l, and among them, the front SO
The one with x a degree is the wind box group 5b and the wind exhaust branch '66.6.
In the case of the tact 7b and the electric precipitator 8b, the waste is sucked in through the 1-1 exhaust fan 9b, and after being desulfurized in the υ1 desulfurization device 10, it is exhausted from the chimney not shown in Figure 2. In addition,
Exhaust gas from the wind box groups 5a and 5C other than the desulfurization filter is shown in a separate system through the exhaust branch pipes 6, 6, . exhaust from the chimney.

This partial concentration desulfurization method V includes the following 4S pot.

(1) SOx in the sludge led to the I desulfurization equipment 10
Concentration, °, l, I1 removal of SOx is carried out effectively, Ijfi! 'SOx removal in Me device 10 (
, i is large, and 1) SOxM emitted from the chimney can be reduced, which is advantageous in terms of pollution.

(2) Compared to the all-Y desulfurization method, the amount of waste to be processed in the desulfurization equipment lo is smaller, so the cost of fan and pump power and the cost of fuel for afterburning can be significantly reduced, contributing to energy conservation.

However, in this conventional partial a condensation desulfurization method, the concentration desulfurization section is fixed and the SOx emission pattern is not controlled. For this reason, the SOx emission pattern changes depending on the operating conditions (pallet speed, coke ratio, sintering raw material, moisture, etc.), so there has been a drawback that sufficient SOx removal and energy conservation cannot be achieved.

The present invention was proposed in order to eliminate two drawbacks, and its first purpose is to provide a sintering machine that can remove SOx with higher efficiency and energy savings.

First, the 1111 proposed findings for realizing the present invention will be explained.

Figure 3 shows an example of the SOx concentration in a sintered steel experiment conducted by the inventors using a sintering machine that performs the same sintering reaction.
The distribution of SOx emissions at that time is shown in FIG. In this experiment, two types of tests were performed. In experiment l = 'stream side wind box group 5a, 5c
Two levels of 1 pumping negative pressure θ were performed to lower the negative suction pressure.

From these results, it is clear that the force in Experiment Y is smaller than in Experiment X, and the 5Ox) i5 raw site is narrower, and the two-level suction negative pressure method is more suitable for the partial concentration desulfurization method. In addition, in FIG. 3, FIG. 4, and FIGS. 5 and 6 described later, the sintering time of the pot experiment is expressed by replacing it with the length of the sintering machine.

Next, the actual result of the one-level suction negative pressure method'@X is shown in Figure 5 and 2.
Regarding Experiment Y of the level suction negative pressure method, we were able to learn the following from the experimental results shown in Figure 6.

(:1) Based on the relationship between the SOx concentration pattern and the υ1 scum warmed melon pattern, SO in 91 scum in the longitudinal direction of the sintering machine
x cIW?) The position where it starts is from the spring ignition position intersection 1 to 1 no 1 force 111A degrees or ioo'c position sentence 4,
When &I [in Sentence 5 is l, position 12 is located approximately 0.7 times the distance in Figure 5, or approximately 0.8 times the distance in Figure 6. A) This is blasphemous sentence 3.

(2) Lidocus? i! +1! In 1δ sentence G1 sentence 7, where L is the maximum, the SOx concentration has already decreased.

The present invention is based on this knowledge, and when carrying out concentration and deconcentration 4j from the wind box group in the middle part of the wind box group in the middle part of By adjusting the sintering suction air volume and controlling the temperature of (1), a preferable SOx generation pattern can be maintained and partial desulfurization can be carried out efficiently.

In addition, is it possible to use SOx concentration as an index?
Since it is difficult to continuously measure the SOx concentration with high accuracy, there is no problem even if it is used after straining.

Hereinafter, the present invention will be explained as follows.

Fig. 7 shows a sintering machine according to an embodiment of the present invention, which has a small wind box group and a long force surface with 4 non-scum SOx concentrations suitable for entering an 8-minute I condition. Operation status showing the pattern! In Table 1, the waste gas temperature in this wind box group is i o o 'c located on the upstream side of the ore feeding section side from Kozu wind box B, and the distance from the field ignition position to this wind box B is The PfL box A located at a position corresponding to 0.7 to 0.8 times of
The outlet end wind box is used as the wind box, and the wind box A and the wind box C are used as both ends. and the second wind box group in the non-desulfurization section 20.22 where the SOx concentration in the waste gas on the downstream side is low, and the first and second wind box groups are separated into independent first and second wind box groups, respectively. 2nd] connected to two exhaust fans;
It has an exhaust gas temperature adjustment stage F which adjusts the exhaust gas temperature of the L wind box B to 100°C and adjusts the exhaust gas temperature of the 1- wind box C to the maximum temperature. Intermediate #I in the longitudinal direction of the sintering machine
l (7) The wind box group 5b of the partial concentration desulfurization section 2J and the wind box group 5a and 5C of the non-desulfurization section 20.22 are in a separate system from the main Ul.
Wind? Connected to old 7a and 7b respectively, collection J'l+4y'1
．． 8a, 8b respectively - IE tel wind machine 9a
, 9b. The main exhaust fan 9b further desulfurizes the device 1θ! ! ! tied. Also, wind box group 5a, 5
b, 5c 1141 is the air leakage prevention device 11, l
l a is provided.

The first stage of exhaust gas temperature adjustment is the temperature 5112...12 described later.
A, 12b, a control circuit (not shown), and wind turbines 9a, 9b to which these are connected. In the wind box j'15b of the desulfurization section 21 determined from the optimal SOx pattern for υF gas partial desulfurization, the number of υ1 scraps 7111 is 100.
If the wind box B that becomes 'C is W i qYi C1, the set temperature of the wind box of this Wi number I' is ioo'c, and the wind box of W'i+n [1] located at the most downstream of the desulfurization section 21 Set the temperature of box C to the maximum temperature. The control temperature in the wind box B of Wi number 1.1 is changed to Wi+ by 112 to the temperature.
The exhaust gas temperature in the wind box C of "n number l" is Woi Ia
1llll+ is determined by +ll' 12 a. By the way, in this embodiment, temperature, ;lt 1. of 2 and 12a. The measured temperature T1 at 112 on the downstream side is used as the forehead index, and the temperature T1 at 1112 is ioo℃.
First, ilj is controlled so that this is achieved, and then the temperature on the flow side If! Using the temperature T2 of L+1l12a as an index, primary control is performed so that this temperature 1 & T2 becomes the maximum temperature. First, the handles are attached to each wind box 5,5... Exhaust gas thermometer 12・
. . , 12a, 12b, as described above, the wind box B where the exhaust gas temperature becomes 100°C is set as Wi number ■.

The position corresponds to approximately 0.7 to 0.8 times the distance from the wind box located at ignition position sentence 1 to the wind box at Wi number 1.1! ;L2
, the W i -mth wind box A in sentence 3 is set as the wind box at the starting end of the desulfurization section 21, and the position K6 where the υi waste temperature is the highest is
, the Wr+n number n wind box C of 7 is designated as the end wind box at the end of the I-sulfurization section 2], and the space between these is designated as the desulfurization section 21.

Using the temperature of the thermometer 12 as a priority indicator, if the exhaust gas temperature of the wind box B at this setting position is lower than 100°C, it indicates that the progress of the sintering reaction is delayed.

Taste. Therefore, in order to promote the progress of the sintering reaction, JL
Theory (+(e eiF side 20, 2217) Main 1J1 wind fan 9a (7) Increase the damper opening or increase the rotation speed -C suction Ijl wind II)- to reduce the wandering waste of wind box B. The temperature is controlled to be 100℃, and the SOx concentration is 1.
Move 1 point of body -4 to the stream side. On the other hand, if the exhaust gas temperature is below i o o 'c, it means that the sintering reaction is progressing too much, so the non-desulfurization part 20.22IIllI King 1 No 1 Kaze 429
Lower the suction air volume of a, and set v tocus 7 IR to I OO
Control Flj so that it becomes 'C, and I knee of SOx concentration)
(Moves the point one direction. Through a series of controls,
, temperature T1 of 1112 or sunken car'
I (White 100'c Uzuki (Yoshibube 20, 22
Side U) ()i Keep the damper opening degree or rotational speed of the wind blower 9a unchanged, and maintain the suction wind speed of the non-1 Yue-Kut C section 20.22 constant. In this way, if the non-11 (2 sulfur parts 20.22:lJl control is 4%7, W i +
n Temperature of wind box C of IW Ll, temperature T of 112a
Note 1.1 to 2, that N crystal V melon T2 or the most f adventure Jl! nj
l Check to see if it is available in the government office.

lBi! JAt Department 21 JT & Do Style W i + n
Wind box C (7) υ [Cass 7fa IJ& and lr= r'x +; E 12 a's ii+, i l
T 2ka) Il & +M + On 1st, there is no problem, but in each wind box 5, 5...
Itl 2 b, 12 b... If the temperature deviates from the maximum temperature to the l-flow in view of the a111) part and /li, the suction air of the main Vl wind fan 9b on the demc removal part 21 side , the progress of the sintering reaction is delayed only in this part, the maximum temperature is moved to the wind box downstream of the desulfurization section 21, and the wind field height unit is further reduced. On the other hand, if the maximum temperature is shifted downstream from the wind box C at the most downstream side of the desulfurization section 21, the main exhaust J on the desulfurization section 21 side! Suction wind of It machine 9b~
Increase Y to accelerate the progress of sintering, and transfer one melon to the wind box C of the lowest IA layer of the desulfurization section 21 for a maximum of 7 hours to achieve SOx collection = 4.

Next, the controller ++A of this embodiment is shown in the flowchart of FIG. 8, and will be explained with reference to FIGS. 7, 9, and 10.

In this example, first, by maintaining the exhaust gas temperature of the wind box B at the position Widake 11 at lOOoC,
The SOx concentration downstream of the desulfurization section 21 is made appropriate. Next, the SOx concentration downstream of the desulfurization section 21 is reduced to an injunction ( 150 ppm), which results in SOx
Maintain the concentration at a suitable +1-. This operation is performed sequentially in the following random order.

This release &:i 8g 21 person's side controller 11 "1 is the setting position 1〆1 4 non-force product A IK T 1 or 100°
When it is colder than C, the SOX concentration portion i is i'59
The distribution is as shown in the distribution 111 in the figure, and in this case, the roasting f('l) on the upper JZc side from the desulfurizing section 21 (-)l IIs' on the sulfurizing section 20, 22 side 5a,
5c suction wind・'+1 minus 1. In addition, 4 pieces of waste temperature 1
From T1 or 100℃, tj; (When it is 5Ox1
In this case, in order to increase the sintering speed, the suction air bF of the wind boxes 4i'15a, 5c on the non-desulfurization part 20.22 side is Reduce acupuncture.

Next, the SOx concentration Ilj on the inlet side of the desulfurization section 21 is divided into 7k, and the desulfurization I' is controlled on the outlet side of the desulfurization section 21. Part 1-11 "4 is (,) [When the temperature of the scum is at its highest point, and it is shifted from the wind box C downstream of the desulfurization section 21, the sintering process ends quickly and the SOx concentration distribution is like the minute 21j 11 in Figure 10. And S
1) Low OX concentration 1) In order to perform the de-sulfur removal process, from the viewpoint of saving labor and energy, the suction air volume on the 1-desulfurization unit 21 side is slightly reduced and the sintering speed in the desulfurization unit 21 is lowered.

Furthermore, when the temperature position at the forefront of the sludge deviates from the final wind box C, the sintering completion r is delayed and the SOx concentration distribution becomes as shown in the distribution (2) of the 101 Δ. Since the exhaust gas with high SOx concentration is released to the town desulfurization section 20 and 22 side, the SOx concentration to the SOx trap-4 is lowered.

Therefore, the suction wind j11 of IBQ ljc part 2111111
is increased to increase the sintering rate in the desulfurization section 21. Through these series of operations, the SOx concentration distribution is set as shown in the distribution diagram in FIG. 1O.

As explained above, the present invention is aimed at reducing 5Ox in the exhaust gas of a sintering machine.
It has the effect of being able to be removed more effectively and with lower energy than 4.

[Brief explanation of drawings]

q', Figure 1 shows υ in the Doka suction type sintering machine; Figure 3 shows the part of the scum and SOx concentration, Figure 2 is an explanatory diagram of the conventional partial concentration desulfurization type sintering machine, and Figure 3 shows the pot experiment. SOx concentration due to
Kura distribution map, No. 41 Δ is the generated SOX due to experiment 1.
: (f, -i) 2p diagram, i'55 diagram, Figure 6 is 1 piece temperature 1 bar and SOx concentration distribution diagram from ti experiment, )) 7
The figure is a block diagram of an embodiment of the present invention, FIG. 8 is a flowchart 1 according to an embodiment of the present invention, FIG. 9, and FIG.
, II is an explanatory diagram of an example of an SOX a degree pattern in waste. 1... Sintering machine 2... Ignition furnace 3... Hara W, social equipment 4... 30 bed ore supplies 5
...Wind box 6...Wind exhaust branch? 11 7a, 7b... King 4 non-wind pipe 8a, 8b... Dust collector 9 a, 9 b -1, t)lJt Machine 10... +
151! A last device 11, lla = air leak vJ11 - device 12.12a, 12b - = 4 no 1 cass Jfm Ia +
Words - A, B, C... Kazehakode Kei 1 Inu Kawagoe ■ Seikin Co., Ltd. holder ji'j'l! I Ding Kosugi You Male Solo 1
Ri Kazunori Fuji Figure 8 η and XOS

Claims (1)

[Claims] L To' direction: 4 tons of wind box for 1 machine, or te in the longitudinal direction.
In the operation state where the exhaust gas SOXaIJJ pattern suitable for sulfur is reduced in the waste portion 115, the exhaust gas temperature in the wind box 4 is on the ore feeding section side from the wind box B where the temperature of the exhaust gas in the wind box 4 is 100 ° C -1
．． Ill located on the first life side, from Harayoichi 1 ignition position to the wind box B: Wind box A at 1 position, which corresponds to 0.7 to 08 times the height of the groom, is used as the end wind box on the side containing desulfurized oil, 1. Dust 4J [dust temperature or the front wind box C is I+5 [! The first wind box t of 1b has a high concentration of SOx in the exhaust gas, 0 high desulfurization, and the wind boxes A and C are both gI'^;
IT- and the first wind box group'-stream side Ayohido 17ij
The second part of the non-desulfurization part with a low agricultural level of SOx7 in the waste from the
The first and second wind box groups are connected to the first and second main exhaust fans of German rZ, respectively, and the waste from the wind box B is heated to 100°C. The sintering machine is equipped with a υF waste temperature control means for adjusting the temperature of the waste waste of the wind box C to the highest temperature.