Constant-pressure tank tail gas purification device with 'breathing' function
An exhaust gas purification device and a technology for atmospheric tanks, which are applied in the directions of packaging, transportation and packaging, chemical instruments and methods, etc., can solve the problems such as the inability to eliminate the breathing facilities on the top of atmospheric tanks and reduce the exhaust emissions of atmospheric tanks, and achieve the Conducive to safe production, environmental protection and stable operation
Active Publication Date: 2013-01-30
ANHUI SHIHUA ENG & TECH
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Problems solved by technology
[0007] In view of the fact that the existing atmospheric tank exhaust gas purification device cannot eliminate the defects of atmospheric tank top breathing facilities, the technical problem to be solved by the present invention is to provide an exhaust gas purification device that can "breathe" synchronously with the atmospheric pressure tank to eliminate atmospheric pressure. The breathing facility on the top of the tank can stably purify the exhaust gas exhaled from the atmospheric tank, isolate the outside air, and return the exhaust gas to reduce the exhaust gas emission of the atmospheric tank
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[0017] In view of the characteristics of the general centralized arrangement of atmospheric tanks used in industrial production, the preferred gas gathering main pipe of the present invention connects the tail gas discharge pipes of similar atmospheric tanks, and uses the exhaust gas of atmospheric tanks to balance the "breathing" of atmospheric tanks as far as possible; for the top of atmospheric tanks Exhaust tail gas, and the requirement of high-point discharge of tail gas for environmental protection, the present invention preferably has two towers for tail gas treatment, adopts the top of the tower for air intake, and the top of the other tower is equipped with a gas vent pipe, which prevents the tail gas from forming a liquid bag in the main gas gathering pipe. Blocking the intake pipe reduces the pipeline; for the instability of the exhaust gas discharge of the atmospheric tank, the present invention preferably sprays and purifies the exhaust gas in the empty tower to ens...
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The invention discloses a constant-pressure tank tail gas purification device with a 'breathing' function, belonging to the technical field of gas purification and treatment and used for solving the problem of gas pollution generated by the 'breathe' of the constant pressure tank. According to the invention, tail gas of the constant-pressure tank is purified by adopting a double-tower spraying atomization solvent method, a balance liquid seal and a safe liquid seal are respectively arranged in a solvent A spraying tower and a solvent B spraying tower, and a gas complementary device is combined, thus the purification device and the constant-pressure tank can 'breathe' synchronously, and a breathe appliance at the top of the constant-pressure tank is replaced; an automatic control system is adopted in the purification device, and only purifies the exhalant tail gas; the top of the solvent B spraying tower is provided with a single-layer bubble cap tray for insulating the external air, returning the tail gas with pressure, and reducing the complementary amount of inertia gas. According to the invention, an inorganized emission source at the top of the constant-pressure tank is eliminated; the tail gas emission of the constant-pressure tank is reduced to the greatest extent, tail gas cannot be extract excessively and external air can be prevent from entering, the safety performance is good, and the running cost is low.
Description
technical field [0001] The invention relates to a device for purifying the tail gas of an atmospheric tank by using a solvent absorption method, in particular to a device for purifying the tail gas of an atmospheric tank with the function of "breathing". Background technique [0002] In industrial production, a large number of atmospheric tanks are used to store various liquid media, and the working pressure of atmospheric tanks is generally between -637Pa and 2156Pa. There is a gas phase space on the top of the atmospheric tank, which is filled with various volatile substances. As the liquid medium enters and exits the tank, the rise and fall of the liquid level in the tank will cause a change in the gas pressure in the tank, so that the gas in the tank is discharged or the outside air is sucked in. This process is called the "big breath" of the tank; changes in the temperature and air pressure of the external environment will also cause the gas in the tank to be discharged...
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IPC IPC(8): B01D53/18B65D90/32B65D90/22
Inventor 陈群
Owner ANHUI SHIHUA ENG & TECH