SU1168604A1 - Device for equilizing pressure in blast furnace intercone space - Google Patents

Abstract

1. A device for equalizing the pressure in the interfacial space of a blast furnace, containing filling and waste gas pipelines, shut-off and atmospheric valves and compression system, characterized in that with a chain of reduction of capital and operating costs for compression. the gas supplied to the interconusal space, the compression system is equipped with a two-chamber cylinder with a piston in the upper chamber, the upper and lower chambers communicate through a branch pipe having a shut-off valve and a nozzle at its end, and the upper chamber is connected to collectors of clean and half-clean divided gas using a gas pipeline with shut-off valves, with the lower chamber connecting (L no gas pipelines, imimi shut-off valves, with clean and semi-clean blast furnace gas collectors and with a blast furnace cone space. a 00 05 o 4

Description

2. The device according to claim 1, about tl and which is so that it is equipped with an output coaxially installed

a nozzle orifice and an NG gasket located on the filling gas pipeline;

The invention relates to the charging equipment for domain furnaces and can be used in black etallation. A device for pressure generation in the inter-conical space of a blast furnace is known, containing 1 a11 waves of gas, and waste gas pipelines connected to a small cone space of the furnace, equalized first. and atmospheric gas cleaning valves. Domestic gas interconusal space. The operation of the device is due to the fact that atmospheric is closed before lowering KOiiyca. The coaxial valves are opened, and in the small-cone space, the supply gas is fed through the gas pipeline. By lowering the small zsonus, gas from the interconusal space through ha is cleaned through the discharge gas pipeline into the clean gas collector of low pressure L. A disadvantage of this device is that the non-obtrusive gas is supplied to the inter-conical prostration with a pressure equal to 1 liter pressure in the furnace working space by the amount of pressure losses during the gas cleaning and the gas path (approximately 10,000 Pa). The presence of a difference in pressure in the interstitial space and the working space of the furnace results in a certain condition for the flow of dirty flue gas out into me / conical space, as a result of which intensive abrasive wear of the contact surfaces of the cone and bowl occurs. In addition, when discharging polluted gas from the inter-combustion space, equalizing valves are noticeably worn out. The most common to the invention according to the technical essence and the achieved result is a device containing filling and waste gas pipelines, drainage and atmospheric valves and compression systems. The operation of the system consists in that, after equalizing the pressure with a semi-pure gas; .-: and the conical space of the turbo-compressor is supplied with a hyluchzy zaz with a pressure exceeding pressure in the furnace. ; 1p; - with water; spring is mounted on a turbine, operating on replacement gas, taken out after gas cleaning; 1; before the throttle group. :. As a result, the lawsuit: 1) the flow of the dirty top gas into the non-conical space in the mixture of the charge into the furnace. Before opening; 1: atms sphernyk valves, interstitial gas from rostranstaz gas is discharged into c) the collector of clean low-pressure gas, because it is not ignored by the co-chow valve or c1: 1, eu; twain; 1adis) nn: e costs tuuroko; -; res: sorn 1o station and the complexity of its operation. 11el1, inventions - coiqiauieinie capitals; 1x and exploitation of Ily; -: the cost of lia comtreggirovaniya gas supplied to the interco - gus prostrate. Post Tips. The del is achieved by the fact that in the -fro-system for pressure equalization i with a small cone space to :. Nets containing G1poln 1schy and waste gas pipelines, O1sechn; 1g and atmospheric icnanaiibi and komrschIUYuYu system, the last C11 1bzhe; -; ; the shut-off valve is 1 slit and the sonlo is at its end, and the upper chamber is connected to the collectors of clean and hyluchistic blast-furnace gas using:; a gas pipeline with shut-off icriana, ripi; This lower chamber is connected to gas pipelines with shut-off valves, with clean and semi-clean blast furnace gas collectors and with a cone space of the blast furnace. The device is fitted with a nozzle outlet mounted coaxially and an injection chamber located on the filling gas conductor. The installation of a cylindrical body with a Dvizhuv, with a piston in it allowing, when pressure is equalized above and below the piston, to compress the half-pure blast furnace gas due to the force of the piston gravity. When the compressed blast furnace gas flows through the nozzle into the injection mixing chamber, gas is injected from the semi-pure gas collector, and the pressure of the gas exiting the injection chamber into the filling gas pipeline is 1000 Pa higher than the pressure in the furnace. Therefore, when such a gas is supplied into the inter-conical space, at the time of charge transfer to the Furnace, the flow of the dirty coloscine gas from the furnace to the inter-conical space is excluded. By connecting the space above the piston to the collector of the semi-pure gas, it equalizes the pressure above and below the piston, which allows the latter to descend and compress the gas. Connecting this space to a clean low-pressure gas collector creates a pressure difference above and below the piston, under the action of which the piston rises to its highest position. The drawing shows the proposed device. The cone space 1 of the blast furnace 2 is connected by a filling gas pipeline 3 through a compression system 4 to a collector 5 of semi-pure gas and a collector 6 of pure low-pressure gas. The boosting system 4 is. a cylindrical housing 7 with a partition 8. Inside the housing above the partition, the piston 9 freely moves, the space above which communicates with the cone space 1 through the nozzle-nozzle 10, installed in the housing partition and the filling gas pipeline 3. The nozzle-nozzle 10 is equipped with a cut-off 44 valve 11. The cavity of the housing under the piston is connected by a gas pipeline 12 to a collector 6 of clean gas and a gas pipeline 13 to a collector of 5 semi-pure gas. The space above the piston 9 communicates with the clean gas manifold 6 through a gas pipeline 12. The device is equipped with a waste gas conduit 15 connecting the cone space 1 to the low pressure clean gas manifold 6. A mixing injection chamber 16 is installed on the filling gas line 3 in the immediate vicinity of the outlet section of the nozzle-nozzle 10. Pipelines 3, 12, 14 and 15 are equipped with shutoff valves 17, 18, 19 and 20, respectively. The cone space 1 is equipped with atmospheric valves 21. The device operates as follows. During the charging of the large cone, the valves 11, 17, 18 and 20 are closed, the valves 19 and 21 are open and the piston 9 is in its extreme upper position. After the small cone is closed, before lowering the large cone, atmospheric valves 21 are closed, valve 17 and semi-pure blast furnace gas from collector 5 open through gas pipeline 13, injection mixing chamber 16 and gas pipeline 3. enter blast furnace inter-cone space 1. The maxillary space 1 is flattened, the valve 19 is closed, the valve 18 is opened, and the half-pure gas from the manifold 5 is supplied through the gas line 12 to the body cavity above the piston 9. The gas pressure above and below the piston is equalized achinaet descend under its own weight, compressing the gas-pure, finding schiys underneath. The piston 9 stops at a position where the force corresponding to the pressure difference between the collector 5 of the semi-pure gas and the space under the piston 9 balances the weight of the piston. The pressure established under the piston will be 35 MPa. After that, the valve 11 is opened, and the compressed gas flows out of the nozzle 10 into the injection chamber 16 of the mixing chamber, injecting gas from the manifold 5. The gas pressure, you-.

mixing from the injection chamber 16 to the filling gas pipeline 3 and then to the inter-conical space 1, by 500-1000 Pa exceeds the pressure in the working space of the furnace.

The lowering of the piston 9 and the outflow of gas from the nozzle 10 is carried out during the time of lowering the supply of the charge to the furnace, thus eliminating the flow of the dirty top gas from the furnace 2 to the inter-cone space 1. After closing the large cone, the valve 17 closes, the valve 20 opens, and the gas From the cone space, the pipeline 15 is discharged to the collector 6 of clean low-pressure gas. Then, atmospheric valves 21 open. Simultaneously with valve 17, valve 18 is closed, valve 19 is opened behind it on the gas pipeline 14 connecting the clean gas collector 6 with the space above the piston 9. Under the action of the pressure differential above and above the piston 9, the latter rises. When the piston reaches its highest position, the valve 11 closes. The device is again ready for operation.

Since the volumes of inter cone spaces are different for domain

10 furnaces of different volumes, differently the operation time of a large cone and the amount of gas required to feed into the inter-conical space in order to suppress harmful emissions

15 Therefore, it is possible to work several proposed devices of Windows with x x devices in one system.

The application of the invention allows 20 to reduce the capital and operating costs of the installation to equalize the pressure in the inter-conical space or gas purification of the inter-conical space, as well as 25 to extend the service life of blast furnaces.

Claims (2)

1. A DEVICE FOR ALIGNING THE PRESSURE IN THE INTER-CONE SPACE OF A DOMAIN FURNACE, containing filling and waste gas pipelines, shut-off and atmospheric valves and a compression system, characterized in that, in order to reduce capital and operating costs for compression. of gas supplied to the inter-conical space, the compression system is equipped with a two-chamber cylinder with a piston in the upper chamber, the upper and lower chambers are communicated through a pipe having a shut-off valve and a nozzle at its end, and the upper chamber is connected to the clean and semi-blast furnace gas manifolds using a gas pipeline with shut-off valves, while the lower chamber is connected by gas pipelines having shut-off valves, to the collectors of clean and semi-blast furnace gas and to the inter-cone space of the blast furnace. 2. A device that is installed but installed in accordance with π. 1, the point is that it is supplied with an outlet nozzle and located on the filling gas pipeline with injection to the mixing chamber.