Technology for reclaiming hydrogen chloride tail gas in chemical production
A process technology, chemical production technology, applied in chemical instruments and methods, dispersed particle separation, separation methods, etc., can solve problems such as unfavorable industrialized continuous production, waste of time, waste of energy and environmental pollution, and achieve complete recovery and high-efficiency. The effect of added value utilization, improving economic efficiency and saving water resources
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[0008] Example 1:
[0009] Attach absorption towers 1, 2 and 3 (see image 3 ) Load 1 / 2 tower height of deionized water absorbent, load industrial ammonia water into the lower part of the neutralization tower, close check valves 1 and 2, adjust the four-way valve to make the fan 1 communicate with the absorption tower 1, from the absorption tower The outer layer (or inner cooling pipe), along the direction of absorption tower 1-absorption tower 2-absorption tower 3-neutralization tower, is supplied with coolant to control the temperature of the absorbent in the absorption tower to be less than 20 ℃, and hydrogen chloride produced in industry After the exhaust gas passes through the cooler and the dryer (the current dryer does not need to install desiccant), the fan 1 enters the absorption tower 1 through the four-way valve. After the hydrogen chloride gas passes through the sand core plate, a lot of gradually rising water is formed in the water The tiny bubbles of hydrogen chlor...
Example Embodiment
[0010] Example 2:
[0011] When the concentration of hydrogen chloride from tower 1 reaches 38%, adjust the four-way valve, connect absorption tower 2 and fan 1, open fan 2 and check valve 1, close fan 3 and check valve 3, and set the absorption tower After the hydrochloric acid in 1 is put into the concentrated hydrochloric acid storage tank, add deionized water absorbent, so that the way for hydrogen chloride gas to be absorbed: absorption tower 2-absorption tower 3-absorption tower 1-neutralization tower is opened. The process of absorbing hydrogen chloride continues until the concentration of hydrogen chloride in the absorbent water is sampled and checked from the tower 2 to reach 38%.
Example Embodiment
[0012] Example 3:
[0013] When the concentration of hydrogen chloride sampled from tower 2 reaches 38%, adjust the four-way valve, connect absorption tower 3 to fan 1, open fan 3 and check valve 2, close fan 4, and release the hydrochloric acid in absorption tower 2 After the concentrated hydrochloric acid storage tank, add deionized water absorbent, so that the way for hydrogen chloride gas to be absorbed: absorption tower 3-absorption tower 1-absorption tower 2-neutralization tower is opened. The process of absorbing hydrogen chloride continues until the concentration of hydrogen chloride in the absorbent water is sampled from the tower 3 to reach 38%.
[0014] In Example 1, the way that hydrogen chloride gas is absorbed is: absorption tower 1-absorption tower 2-absorption tower 3-neutralization tower. In Example 2 the way that hydrogen chloride gas is absorbed is: absorption tower 2-absorption tower 3 Absorption tower 1-neutralization tower, the way in which hydrogen chloride ...
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