Waste heat utilization system of blast furnace slag flushing water
A blast furnace slag flushing water and waste heat technology, which is applied to heat exchange equipment, cleaning heat transfer devices, lighting and heating equipment, etc., can solve the problems of pipe network blockage, huge heating pipe network system, and large amount of slag flushing water.
Active Publication Date: 2019-06-25
HUAIYIN INSTITUTE OF TECHNOLOGY
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Problems solved by technology
This utilization method is simple in technology and low in transformation cost, but there are the following problems: first, the amount of slag flushing water is large and contains a lot of heat, while the heating load in general factory areas is small, and the waste heat of slag flushing water cannot be fully utilized; Heating is only suitable for winter use in northern cities, and there is no such demand in southern cities and summer, and its application has limitations; third, the slag flushing water contains a lot of impurities, which is easy to cause blockage after entering the pipe network, and the heating pipe network system is huge. very difficult to clean
The application of blast furnace slag washing water to seawater desalination is also restricted by region, limited to coastal iron and steel enterprises
Method used
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Embodiment
[0033] The waste heat utilization system of blast furnace slag flushing water in this embodiment is as follows: figure 1 As shown, it includes interconnected filters and heat exchangers, wherein the filter 15 includes a cleaning brush 16, a filter screen 17, a central shaft 18, a source water inlet 12, a clean water outlet 11, a thick slag water outlet 22 and a thick slag Water outlet control valve 21, the slag washing water enters the filter 15 through the source water inlet 12 of the filter 15, the filter screen 17 blocks the slag in the source water, and the clean water is discharged through the clean water outlet 11 of the filter, and sent to use The top of the filter 15 is provided with a motor 13, which drives the cleaning brush 16 through the central shaft 18 to remove the water slag on the filter screen 7; the removed water slag is discharged from the filter through the thick slag water outlet, and sent back to the slag pool; the thick slag The water outlet is provided...
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The invention provides a waste heat utilization system for blast furnace slag flushing water, which includes a filter and a heat exchanger connected to each other. The filter has a raw water inlet, a purified water outlet, a concentrated slag water outlet, and a cylindrical filter screen. The inner wall of the cylindrical filter is connected with the raw water inlet, the outer wall of the cylindrical filter is connected with the clean water outlet, and a central shaft driven by a motor is pierced in the housing, and a cleaning device for scraping the inner wall of the cylindrical filter is installed on the central shaft. device, a control valve is connected in series at the outlet of the concentrated slag water; the heat exchanger is a plate heat exchanger formed by stacking heat exchange fins in sequence, and is equipped with a slag inlet pipe, a slag outlet pipe, a clean water inlet pipe and a clean water outlet pipe; A pickling water inlet valve is provided on the slag water pipe, a pickling water outlet valve is provided on the slag outlet pipe of the heat exchanger, an ultrasonic sounder is attached on the other side of the heat exchanger, and the slag inlet pipe is connected with the clean water outlet. The invention solves the problem that the heat exchanger is blocked during the waste heat recovery process of slag flushing water.
Description
technical field [0001] The invention relates to waste heat utilization of blast furnace slag flushing water, in particular to a blast furnace slag flushing water waste heat utilization system. Background technique [0002] As a pillar industry of the national economy, the iron and steel industry plays an important role in my country's modernization drive, but it is also a major energy consumer and polluter. It will generate a lot of waste heat and energy while consuming energy and promoting material transformation. In the blast furnace ironmaking process, the temperature of the generated slag is about 1000°C. The treatment method of most iron-making enterprises is: the slag is quenched into water slag by the high-speed water flow provided by the slag flushing pump in the slag flushing box and granulated for the production of cement. This process can produce a large amount of hot water at a temperature of 80-95°C. Usually, in order to ensure the recycling effect of the slag...
Claims
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IPC IPC(8): C21B3/08F28F19/01F28G13/00
CPCC21B3/08F28F19/01F28G13/00Y02P10/20
Inventor 薛建勋许兆美杨刚汪通悦侯志伟吴海兵
Owner HUAIYIN INSTITUTE OF TECHNOLOGY