A device and method for drying ammonium sulfate by utilizing the waste heat of flue gas of coking tubular furnace
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A flue gas waste heat, tube furnace technology, used in drying gas layout, heating to dry solid materials, hearth furnaces, etc.
Active Publication Date: 2016-04-27
NANJING IRON & STEEL CO LTD
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Problems solved by technology
According to data reports, there are not many other direct utilization methods for waste heat utilization of tube furnace flue gas in domestic coking plants except for the above-mentioned utilization methods.
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Embodiment 1
[0021] This embodiment provides a device for drying ammonium sulphate by using the waste heat of coking tube furnace flue gas. The structure is as follows: figure 1 Shown, comprise blower 1, fluidized bed 2, exchanger 7 and tube furnace 12, blower 1 and fluidized bed 2 connect exchanger 7 respectively, tube furnace 12 is provided with tube furnace chimney 11, exchanger 7 The lower end is connected to the chimney 11 of the tubular furnace, and also includes an air inlet pipe 3, a thermometer 4, an air mixer 5, an automatic regulating valve 6, a baffle 8, a flue gas pipe 9, a flap regulator 10, and a hot air outlet pipe 13 and pressure gauge 14, the blower 1 is connected to the upper air inlet of the exchanger 7 through the air inlet pipe 3, the fluidized bed 2 is connected to the lower air outlet of the exchanger 7 through the hot air outlet pipe 13, and the hot air outlet pipe 13 is provided with air Mixer 5, a bypass pipe is provided on the pipeline between the air mixer 5 an...
Embodiment 2
[0025] The present embodiment provides a method for drying ammonium sulphate by utilizing waste heat of coking tube furnace flue gas, and proceeds in the following steps:
[0026] (1) Close all valves of the device of the present invention, check the tightness of the device pipeline, and whether the thermometer 4 and the pressure gauge 14 can be used normally, and whether the measuring range is accurate;
[0027] (2) Turn on the blower 1, so that the air enters the exchanger 7 through the air inlet pipe 3, then flows out from the lower air outlet of the exchanger 7, enters the fluidized bed 2 through the hot air outlet pipe 13, and adjusts the automatic adjustment on the bypass pipe Valve 6, until the whole cycle is stable and smooth;
[0028] (3) Adjust the flap regulator 10 so that the flue gas discharged from the tube furnace 12 passes through the tube furnace chimney 11 and the flue gas pipe 9, enters from the bottom of the exchanger 7, flows through the shell side, and tr...
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Abstract
The invention discloses a device for drying ammonium sulphate by utilizing waste heat of coking tube furnace flue gas, which comprises an air inlet pipe, a thermometer, an air mixer, an automatic regulating valve, a baffle, a flue gas pipe, a flap regulator, a heating The air outlet pipe and the pressure gauge, the blower and the fluidized bed are respectively connected to the exchanger through the air inlet pipe and the hot air outlet pipe, the hot air outlet pipe is provided with an air mixer, and the pipe between the air mixer and the lower air outlet is provided with a There is a bypass pipe, the bypass pipe is connected to the air inlet pipe near the upper air inlet, the bypass pipe is equipped with an automatic regulating valve, and the pipeline between the air mixer and the fluidized bed is equipped with a temperature gauge from top to bottom. and a pressure gauge; the present invention also discloses a method for drying ammonium sulfate by utilizing waste heat of coking tube furnace flue gas; the device is simple in design and practical, fully utilizes the high temperature waste heat of tube furnace flue gas, reduces energy consumption and production cost .
Description
technical field [0001] The invention belongs to the field of coke oven gas purification, and relates to a device and a method for drying ammonium sulfate by using waste heat of coking tube furnace flue gas. Background technique [0002] At present, the crude benzene recovery system in the gas purification area of the coking plant uses a tube furnace to heat the rich oil and steam, so that the temperature of the rich oil entering the debenzene tower reaches 180-185°C, and the temperature of the steam entering the regenerator reaches 400-450°C. To meet the above two requirements, the current tube furnace usually uses coke oven gas or blast furnace gas as raw material for combustion, so as to indirectly heat the rich oil and steam to their respective required temperatures to meet production requirements. Exhaust gas and excess air after coal gas combustion are directly discharged from the chimney of the tube furnace to the atmosphere at a temperature of 220-250°C, and the tem...
Claims
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Application Information
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