SU1668399A1 - Blast furnace water cooling unit - Google Patents

Abstract

This invention relates to the steel industry. The purpose of the invention is to reduce the energy consumption for cooling a blast furnace by using the residual pressure of the waste water to supply it to the cooling tower. The device contains a pumping station 1 supplying water through the pressure conduit 2 through the distribution manifold 3 to the cooled elements 4 of the blast furnace, which pass through the cavity of which the water enters the collecting collector 7 of hot water through the pressure discharge pipelines 5. From it, the waste water with a residual pressure is supplied through the pressure conduit 8 to the cooling tower 9. The cooled water flows through the non-pressure conduit 10 to the pump station 1. Up to 10% of the spent water for the monitoring device is simultaneously tapering nozzles 11 installed on the pressure discharge pipelines 5. through a drain funnel 12, through which the waste water is supplied through a pressureless conduit 13, mine cooling tower 9, to the pumping station 1, where it is mixed with 90% of the waste water coming from the cooling tower 9, and then cold water is fed cooling the blast furnace. 2 Il.

Description

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nozzles 11, installed on pressure discharge pipelines 5, are discharged to 10% of waste water for the control device through a drain funnel 12, through which the waste water is supplied through a pressureless conduit 13, mine cooling tower 9, to a pumping station 1, where it mixes with 90% of waste water coming from cooling tower 9, and then cold water is fed to the cooling of the blast furnace. 2 Il.

The invention relates to ferrous metallurgy, in particular to devices for cooling water of a blast furnace, as well as other metallurgical units with devices controlling the operation of the cooling system.

The goal of M3o6peieiiiia is to reduce the energy consumption for cooling a blast furnace by using the residual pressure of the waste water to supply it to the cooling tower.

FIG. 1 shows a scheme of water cooling of a blast furnace with a control device; in fig. 2 — node I in FIG. one.

The device comprises a pumping station 1 for supplying cooling water to the blast furnace, pressure conduit 2, cold water distribution manifold 3, water-cooled elements 4, pressure discharge pipes 5 with non-return valves 6, pressure collector collector 7 of waste water, which is sealed and water It is under pressure from a pumping station 1 supplying water for cooling a blast furnace, a discharge conduit 8 of wastewater, a cooling tower 9, and a pressureless conduit 10 of chilled water.

The discharge pipelines 5 are equipped with reducing pipes 11 for discharging wastewater up to 10% or other similar water removal devices of the type: calibrated holes in the drain, discharge pipes of smaller diameter, control valves, etc., which are connected to the control device consisting of ruptures of tapering nozzles and a drain funnel 12 connected by a pressureless conduit 13 with a pumping station 1. The monitoring device allows to perform visual (by the jet rupture) monitoring and promptly determine the status of a cooling element and the cooling water throughput in the system.

The device works as follows.

Technical water from the pumping station 1 through the pressure conduit 2 is supplied to the distribution manifold 3 of cold water, and then enters the water-cooled

elements 4 blast furnace. Passing through the cavity of cooled elements 4 under the pressure of pumping station 1, heated water is supplied through pressure outlet pipes 5 with check valves 6 to a collector 7 of hot water, from which the waste water with a residual pressure, which in modern blast furnaces is approximately 30-35 m water (without

local resistance), is fed through the pressure conduit 8 to the cooling tower 9, after which the cooled water enters the free-flow conduit 10 to the pump station 1 to feed the cooling

ovens.

At the same time, a tapering pipe (or similar water diverter) discharges up to 10% of waste water from each pressure discharge pipe 5 to a control device consisting of a tapering pipe and a drain funnel 12, through which hot waste water is fed through a free-flow conduit 13 in quantity up to 10% (of the total

. waste water), mine cooling tower 9, to pump station 1, where it is mixed with chilled water (over 90% of waste water) coming from cooling tower 9, and then the resulting cold

water is supplied for cooling the blast furnace.

The application of the invention allows the remaining 90% of the wastewater to be supplied to the cooling tower by using the remainder of the head without using the low pressure pumping station used for this purpose, which significantly saves the energy needed to cool the blast furnace.

Claims (1)

Formula of the Invention A water cooling device for a blast furnace comprising a pumping station connected by a pressure conduit 5 through a distribution manifold with water-cooled elements of the blast furnace, cooling tower, discharge piping, water conduit, device for monitoring the detection of burnout of water-cooled 0 elements made of discharge pipes and a drain funnel, characterized in that, in order to reduce energy consumption for cooling a blast furnace by using the residual pressure of waste water to supply it to the cooling tower, it is equipped with a pressureless conduit, a waste water collector that disposes nozzles are made tapering, and the discharge pipes and water conduit are pressurized, while 0 water-cooled elements are connected by discharge discharge pipelines to a collecting header, which is connected to the cooling tower through an off-water conduit, and the discharge pressure pipelines are connected to a device for monitoring the detection of burnout of water-cooled elements, the drain funnel of which by a pressureless conduit is connected to a pumping station. FIG. 2