JPS6050378A - Device for recovering waste heat from 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 The present invention relates to a sintering machine, and in particular, it is an object of the present invention to improve the sintering machine and increase the amount of waste heat recovered in the sintering machine.

The structure of the present invention that achieves this objective is summarized as follows. That is, in palette 1-wind box,
A small space near Palette 1-Third inside is partitioned, and the exhaust gas containing a lot of sea breeze in this partition is collected by a suction nozzle and a collection duct, and the collection duct 1- is used as an exhaust heat recovery zone. By connecting to the previous main duct with high negative pressure, it is possible to increase the exhaust gas temperature in the exhaust recovery section.

Examples will be described below. Now, referring to the fIS1 diagram, the gli from the ore feeding side to the ore discharge side of the sintering machine is
The relationship between #1 in the wind box and the gas temperature is shown. The exhaust heat from the sintering machine is recovered in the zone on the discharge side where the exhaust gas temperature is high, as shown in FIG.

However, conventionally, in this waste heat recovery zone, approximately 40
~50% of air leakage is contained in the exhaust gas, and the maximum gas temperature is approximately 420-430°C. Therefore, if we assume that the sea breeze is 0%, the total exhaust gas base in the wind box will decrease to 50-60%, and the maximum gas temperature will be 7.
The temperature will rise to 00 to 800 degrees Celsius. This sea breeze mostly enters the pallet 1 near the side, but the main locations are the gap 7 between the barrel 1 side plate 6 and the sintered layer in Figure 2, and the gap between the front and rear pallets. 8.
This is from the sealer 9 and the like. Various methods have been proposed to prevent leakage from these parts, but their effectiveness is not clear.

The present invention does not prevent air leakage from entering the pallet i-
Collection of air leakage that enters from the side wall side JJI: By releasing it, the temperature of the recovered exhaust gas in the exhaust heat recovery zone is prevented from being lowered by the air leakage that enters, and the amount of waste heat recovered is increased by +1. It is. In other words, in the pallet 1-1 and the wind box 2, the partitions Fj and IOA are arranged in a series of small spaces near the part 1 side inside the pallets 1-1 and the wind box 2.
It is partitioned by an IOB, and the 1-no-1 gas containing a lot of sea breeze that enters the partition is released.

Figure 2 shows the barrel 1-1 near the pallet side. Seal par 9. The relationship between the wind box 2 and the wind box 2 is shown. As shown by the arrows in Figure 2, leakage air mainly enters from the pallet side, and a small amount enters from cracks on the surface of the sintered layer. In order to partition and collect air leakage from the pallet side, partition plates 10 are provided inside the pallet 1 and the wind box 2.

The partition plate 1O is the partition plate 10Δ provided on the pallet body and the partition provided inside the wind box 2! Nl0B and Karana-
)ing.

The wind 'a' that is filtered through the partition #i10 is taken out of the wind box 2 by the suction nostle 3, 3', and is collected by the collection duct 4. Generally 4Jl
i The negative pressure inside the wind box of the heat recovery zone is.

It is lower than the negative pressure of the previous zone. Therefore, the third
Air leakage can be collected by connecting a certain collection duct 1-4 to the main duct 1-5 before the IL as shown in the figure. Note that it is naturally possible to connect the collection duct 4 to a fan to perform suction.

In this way, the sintered exhaust gas that does not contain much leakage air is sent to the IJ waste heat boiler 11, where it undergoes heat exchange with water in IfJ, and the heat-exchanged low-temperature H1 gas is passed through the fan 12 to the main duct 1. 5 to 1st. Ru.

As explained above, in the present invention, the M1 gas near the pallet side, which contains a large amount of air leakage, is captured and emitted by the IE 411, so it is possible to raise the temperature of the JJI gas used for exhaust heat recovery. can. As a result, it was possible to increase the amount of recovered steam in the waste heat boiler for recovering waste heat compared to 4B' gas, and it became possible to recover heat with higher enthalpy.

Furthermore, since the exhaust gas ψ handled by the H1 co-heat recovery system is reduced, there is an advantage that the size of the recovery system can be reduced.

[Brief explanation of the drawing]

Figure 1 is a wind box exhaust gas temperature graph when viewed from the ore feed side to the ore discharge side in the sintering machine. FIG. 2 is a side vertical sectional view of a pallet of a sintering machine embodying the present invention. Figure 3 is a piping diagram for guiding exhaust gas from the sintering machine. 1. Pallet 2. Wind box (W B ) 3.
Suction nozzle part 4, Jiti 4J! Duct 1-5, main duct 6, side play 1-7, air leakage 8 from the gap between the side plate and the sintered layer, air leakage 9 from the gap between the front and rear pallets 1, seal bar jO1 partition plate (10Δ... pallet i... Book 1 A (partition plate formed in 10B...partition plate formed in the wind box) o, #f: Heat boiler I2, fan base Applicant Sumitomo Heavy Industries J Nigyo Co., Ltd. sub-agent B Logic, l-・人嬌tunFigure 1Figure 2Figure 3rjA 12]1

Claims (1)

[Claims] J'9 is in pallet 1- and wind box, and a small space near the bullet side inside is partitioned with a partition board.
The waste heat recovery of the sintering machine is characterized in that the partitioned space is communicated with a collection duct through a suction nozzle, and the collection ducts 1 to 1 are connected to a main duct with high negative pressure before the waste heat recovery zone. Device.