CN201210008Y - Cycle sintering exhaust system collocation for sintering machine - Google Patents

Abstract

The utility model relates to a cyclical agglomerating and exhausting system configuration for an agglomerating machine, which comprises an exhausting system, an agglomerating machine, an igniting furnace, an agglomerating large smoke passage, and bellows orderly arranged, and also comprises a cyclical agglomerating fan housing, a fan, a deduster and waste gas isolating devices. The fan housing is arranged above the material surface of the agglomerating machine positioned beside the igniting furnace. The tail part of the large smoke passage is connected with and communicated with the pipe of the fan housing. The fan is arranged on the pipe leading to the fan housing. The deduster is arranged on a pipe leading to the fan and the fan housing. A first waste gas isolating device is arranged in a pipe arranged between the tail part of the large smoke passage and the deduster; and a second waste gas isolating device is arranged in the large smoke passage positioned at the bellows at the tail part of the agglomerating machine. The utility model is used for extracting part of the gas at the tail part of the agglomerating machine, which has high oxygen content and high temperature, and the utility model is also used for the reagglomeration of the agglomerating machine, the full utilization of the residual gas of the waste gas and the reduction of the outside exhaustion of the waste gas, thereby being favorable for energy conservation and environment protection and capable of effectively saving energy and reducing exhaustion.

Description

Sintering machine circulating sintering ventilation system configuration

technical field

The utility model relates to iron ore sintering production in iron and steel manufacturing, in particular to a configuration of a sintering ventilation system for the main exhaust circulation of a sintering machine.

Background technique

At present, most iron ore sintering production in the world adopts the conventional sintering method. The layout of the exhaust system of this sintering method is shown in Figure 1. It directly extracts natural air as the combustion-supporting gas in the sintering process. Numbers in Figure 1: 1 is the exhaust system, 2 is the gas flow direction, 3 is the ignition furnace, 4 is the sintering machine, 5 is the large flue, 6 is the bellows arranged in order and their numbers. Practice has proved that the sintering plant where this method is implemented has become the area with the most serious dust pollution in steel companies, so energy saving and emission reduction in the sintering plant is a very important task.

Using the traditional sintering process and ventilation system, the waste gas emission is ~2500nm ³ ·t ^-1 sintering, the solid fuel consumption is 55kg·t ^-1 sintering, the utilization factor of the sintering machine is 1.4t·m ^-2 ·h ^-1 , and the power consumption is ~ 45kWh·t ^-1 burning, emission ~ 660g·t ^-1 burning, exhaust gas SO _x emission concentration ~ 90ppm. For more and more stringent control targets, the desulfurization system using this sintering process and ventilation system requires a large construction investment. This is because the exhaust gas discharge is large, the concentration is thin, and desulfurization is difficult, which increases the investment in the desulfurization system.

Utility model content

In order to overcome the defects of the above-mentioned traditional sintering process and exhaust system, the task of this utility model is to provide an improved configuration of the circulation sintering exhaust system of the sintering machine, which solves the problem of the existing desulfurization system due to large exhaust gas discharge, low concentration, and difficulty in desulfurization. The problem of increasing construction investment.

The technical solution of the utility model is as follows:

A sintering machine circulation sintering exhaust system configuration, which includes the exhaust system, sintering machine, ignition furnace, sintering large flue, and wind boxes arranged in sequence, and it also includes circulating sintering air cover, fan, dust collector, and waste gas isolation device ;

The circulating sintering air cover is arranged above the material surface of the sintering machine next to the side of the ignition furnace;

The tail of the large sintering flue is connected with a pipe leading to the circulating sintering air hood;

The fan is installed on the pipeline leading to the circulating sintering air cover;

The dust collector is installed on the pipeline leading to the fan and the circulating sintering air cover;

The exhaust gas isolation device includes a first exhaust gas isolation device and a second exhaust gas isolation device for distributing the amount of gas, the first exhaust gas isolation device is installed in the pipeline arranged between the tail of the large sintering flue and the dust collector, and the second exhaust gas isolation device The device is installed in the large sintering flue located in the wind box at the tail of the sintering machine.

Adopting the sintering machine cycle sintering exhaust system configuration of the utility model can effectively save energy and reduce emission, so that the emission of sintering flue gas is reduced to 70% of the conventional sintering process, and the sintering production capacity is not reduced at the same time, and the project investment is also close to the conventional one. The sintering process meets the increasingly stringent environmental protection requirements in the world, and at the same time meets the needs of investors to reduce investment.

Adopting the circular sintering configuration of the utility model, part of the gas with high oxygen content and high temperature at the tail of the sintering machine is extracted and recycled for re-sintering of the sintering machine, making full use of the waste heat of the exhaust gas and reducing the amount of exhaust gas discharged, which is beneficial to energy saving and environmental protection .

Description of drawings

Figure 1 is a schematic diagram of the configuration of a conventional sintering ventilation system of a sintering machine.

Fig. 2 is a schematic diagram of the configuration of a circulating sintering ventilation system of a sintering machine of the present invention.

Detailed ways

Referring to Fig. 2, the utility model is a sintering machine circulating sintering ventilation system configuration, which includes a ventilation system 11, a sintering machine 13, an ignition furnace 14, a circulating sintering air cover 15, a fan 16, a large sintering flue 17, and a dust collector 18 , an exhaust gas isolation device, and several bellows 21 arranged in order, and the bellows 21 are marked with the number of the bellows. Number 12 in the figure is the gas flow direction.

A circulating sintering air cover 15 is arranged beside the ignition furnace 14, and the circulating sintering air cover 15 is installed above the material surface of the sintering machine 13.

As shown in FIG. 2 , the tail of the large sintering flue 17 is connected to a pipe 22 leading to the circulating sintering hood 15 , and a fan 16 and a dust collector 18 are installed on the pipe 22 , and the fan 16 is installed behind the dust collector 18 .

The exhaust gas isolating device comprises a first exhaust gas isolating device 20 and a second exhaust gas isolating device 19, both of which serve to distribute the gas volume. The first waste gas isolating device 20 is installed in the pipeline 22 arranged between the tail of the sintering flue 17 and the dust collector 18, and the second waste gas isolating device 19 is installed in the sintering flue located in the wind box 21 (end number) at the tail of the sintering machine 13 Within 17. The exhaust gas isolation device is installed to select the circulating hot exhaust gas. The first exhaust gas isolation device 20 plays the role of connecting the exhaust gas from the bellows at the tail of the sintering machine to the circulating sintering system. The second exhaust gas isolation device 19 serves to connect the exhaust gas from the bellows at the tail of the sintering machine to the front The function of isolating the exhaust gas of the bellows.

For the exhaust gas isolation device, different exhaust gas isolation devices and the installation positions of the exhaust gas isolation device can be designed according to the specific conditions of the sintering machine flue and the different needs of the manufacturer.

The working process of the sintering machine circulating sintering exhaust system configuration of the utility model is as follows:

During sintering production, the second exhaust gas isolation device 19 is closed, the first exhaust gas isolation device 20 is opened, and the fan 16 and dust collector 18 are activated, so that the tail of the large sintering flue 17 contains exhaust gas with high oxygen concentration, high temperature, and low humidity and the rest Isolation, so that the exhaust gas can be separated, and drawn to the material surface of the sintering machine 13 through the pipeline 22, and the hot exhaust gas is circulated to the material surface of the previous sintering machine 13 through the circulating sintering hot air hood 15.

When the cycle sintering is not needed, open the first waste gas isolation device 20, close the second waste gas isolation device 19, stop the blower fan 16 and the dust collector 18, and then go into the conventional sintering configuration.

Adopting the sintering machine cycle sintering exhaust system configuration of the utility model, the exhaust gas containing high oxygen concentration, high temperature and low humidity from the bellows at the tail of the sintering machine can be extracted by the fan, and circulated to the trolley surface behind the ignition furnace of the sintering machine. Realize hot air sintering. The utility model can be used together with the heat waste gas recovery of the ring cooler for hot air sintering, so as to achieve the effect of energy saving and emission reduction.

The following attached table shows the effect comparison data between the circulation sintering configuration of the utility model and the conventional sintering configuration, and the configuration of the circulation sintering ventilation system of the sintering machine of the utility model has achieved obvious effects.

Of course, those skilled in the art should recognize that the above-mentioned embodiments are only used to illustrate the utility model, rather than to limit the utility model, as long as within the spirit of the utility model, the above implementation The changes and modifications of the examples will fall within the scope of the claims of the present utility model.

Attached table: comparative data of cycle sintering configuration and conventional sintering configuration

Claims (1)

1. A sintering machine circulation sintering ventilation system configuration, which includes a ventilation system, a sintering machine, an ignition furnace, a large sintering flue, and an air box arranged in sequence, and is characterized in that it also includes a circulation sintering air cover, a fan, and a dust removal device, and exhaust gas isolation device; The circulating sintering air cover is arranged above the material surface of the sintering machine next to the side of the ignition furnace; The tail of the large sintering flue is connected with a pipe leading to the circulating sintering air hood; The fan is installed on the pipeline leading to the circulating sintering air cover; The dust collector is installed on the pipeline leading to the fan and the circulating sintering air cover; The exhaust gas isolation device includes a first exhaust gas isolation device and a second exhaust gas isolation device for distributing the amount of gas, the first exhaust gas isolation device is installed in the pipeline arranged between the tail of the large sintering flue and the dust collector, and the second exhaust gas isolation device The device is installed in the large sintering flue located in the wind box at the tail of the sintering machine.

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