Emission technology of vapor containing nitrogen oxide and tar
A technology of nitrogen oxides and steam, applied in chemical instruments and methods, gas treatment, membrane technology, etc., can solve the problems of unguaranteed exhaust gas discharge temperature, low exhaust gas discharge temperature, high exhaust gas discharge temperature, etc., to prevent too little circulating water , improve efficiency and ensure safety
Active Publication Date: 2018-11-23
HENAN SONGYUE CARBON
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Problems solved by technology
The factory adopts the technical measures of water spray absorption to remove sulfur dioxide and nitrogen oxides in the exhaust gas, but the removal effect is poor, and the exhaust gas discharge temperature cannot be guaranteed
If the temperature of the exhaust gas is too low, it is easy to form smog; if the temperature of the exhaust gas is too high, it may cause thermal pollution
Method used
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Embodiment Construction
[0053] figure 1 The direction indicated by the middle arrow is the flow direction of the fluid.
[0054] Such as Figure 1 to Figure 5 As shown, the steam discharge system of the calcination workshop of the present invention includes a waste gas discharge pipe 1, with the fluid flow direction as the downstream direction, the waste gas discharge pipe 1 is provided with a spray device 2 and an electrostatic tar catcher 3 in series from upstream to downstream, and the waste gas discharge pipe The end of 1 is connected with a chimney 4 for exhausting exhaust gas into the atmosphere, and an exhaust fan 5 is provided on the exhaust gas discharge pipe 1 on the upstream side of the spray device 2;
[0055] It also includes a circulating spraying mechanism, which includes a ladder overflow pool 6, a spraying water inlet pipe 7, the spraying device 2 and a spraying water outlet pipe 8; the spraying device 2 is connected to the spraying water inlet pipe 7 And spray outlet pipe 8;
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The invention discloses an emission technology of vapor containing nitrogen oxide and tar. The emission technology comprises the following steps: opening a cutoff valve, a circulating water pump and an exhaust fan, wherein the circulating water pump starts a water circulation process; opening a discharging valve and releasing calcium hydroxide into water in a stepped overflow pool, and opening thedischarging valve when the pH value of the water in the stepped overflow pool is smaller than or equal to 8.0; closing the discharging valve when the pH value of the water in the stepped overflow pool is greater than or equal to 8.7; when an adjustment target is to prevent haze and the temperature of exhaust gas is greater than or equal to 90 DEG C, stopping the temperature-regulating operation;opening the temperature-regulating operation again when the temperature of the exhaust gas is smaller than 80 DEG C; stopping the temperature-regulating operation again when the adjustment target is to prevent thermal pollution and the difference value between the temperature of the exhaust gas and the atmospheric temperature is smaller than 3 DEG C; opening the temperature-regulating operation when the difference value between the temperature of the exhaust gas and the atmospheric temperature is greater than 6 DEG C. The emission technology disclosed by the invention can efficiently remove sulfur dioxide and nitrogen oxide from water, the weak alkalinity of water is maintained on the premise of ensuring safety and the emission temperature of the exhaust gas is correspondingly controlled according to different adjustment targets.
Description
technical field [0001] The invention relates to the technical field of industrial waste gas discharge. Background technique [0002] The exhaust gas discharged from the calcination workshop of our factory contains sulfur dioxide, nitrogen oxides and tar, and the temperature is relatively high, so it needs to be purified and discharged into the atmosphere after temperature adjustment. The factory adopts the technical measures of water spray absorption to remove sulfur dioxide and nitrogen oxides in the exhaust gas, but the removal effect is poor, and the discharge temperature of the exhaust gas cannot be guaranteed. If the temperature of the exhaust gas is too low, it is easy to form smog; if the temperature of the exhaust gas is too high, it may cause thermal pollution. Contents of the invention [0003] The purpose of the present invention is to provide a steam discharge process containing nitrogen oxides and tar, which can efficiently remove sulfur dioxide and nitrogen ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): B01D53/14
CPCB01D53/14B01D53/1456B01D2257/302B01D2257/40B01D2258/0283
Inventor 刘向辉袁建涛李建强张洪恩刘小强毛青坡
Owner HENAN SONGYUE CARBON