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A landfill gas and tower-type technology, which is applied to the separation of dispersed particles, waste fuel, chemical instruments and methods, etc., can solve the problems of different rates, differences in reactions, etc., and achieve the effect of no pollution
Inactive Publication Date: 2018-06-19
LIAONING UNIVERSITY OF TECHNOLOGY
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[0003] Then the problem is that MDEA and H 2 S, CO 2 There is a difference in the reaction difference, causing the MDEA solution to absorb H 2 S and CO 2 The rate is different, so that MDEA can contain H 2 S and CO 2 Selective absorption of H in the system 2 S
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[0024]As shown in the figure, the present invention includes a feed gas tank (1), a feed gas booster pump (2), an absorption tower (3), a casing microreactor (4), an activator piperazine inlet (5), a gas-liquid Separator (6), hydraulic turbine (7), circulating pump (8), flash evaporator (9), lean-rich liquid heat exchanger (10), semi-lean liquid heat exchanger (11), regeneration tower (12 ), reboiler (13), cooling water tank (14), heat pump (15), separator (16), acid water reflux pump (17), acid gas recovery tank (18), semi-lean liquid aftercooler (19 ), lean liquid aftercooler (20), MDEA circulation pump (21), washing tank reflux pump (22), water washing tank (23), treated gas collection box (24), casing microreactor (4) In the cavity on one side of the absorption tower (3), the piperazine inlet (5) of the activator is connected to the outer cavity of the casing microreactor (4) and is arranged at the lower part of the cavity, and the inlet at the lower end of the casing micr...
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Abstract
The invention belongs to the technical field of environmental engineering protection and gas purification treatment, and particularly relates to a twin-tower MEDA landfill gas treating system which can effectively treat harmful gas like CO2 and H2S in landfill gas. The twin-tower MEDA landfill treating gas system comprises a raw material gas tank, a raw material gas pressurizing pump, an absorbing tower, a sleeve-type microreactor, an activator piperazine inlet, a gas-liquid separator, a hydraulic turbine, a circulating pump, a flash evaporator, a rich-lean liquid heat exchanger, a semi-lean liquid heat exchanger, a regeneration tower, a reboiler, a cooling water tank, a heat pump, a separator, an acid water backflow pump, an acid gas recycling tank, a semi-lean liquid aftercooler, a lean liquid aftercooler, an MDEA circulating pump, a washing tank backflow pump, a water washing tank and a treated gas collection tank. The twin-tower MEDA landfill gas treating system is structurally characterized in that the sleeve-type microreactor is arranged in a cavity on one side in the absorbing cavity.
Description
technical field [0001] The invention belongs to the technical field of environmental engineering protection and gas purification treatment, and in particular relates to a double-tower MEDA system for treating landfill gas. Background technique [0002] CO capture by solvent absorption 2 and H 2 S is the most widely used method at present. Using methyldiethanolamine (MDEA) as the absorption liquid, adding activator piperazine to MDEA can effectively improve its absorption capacity. Compared with other absorption liquids, MEDA is easy to regenerate and has low energy consumption. MEDA vapor pressure is low, and the loss of solvent for absorbing acid gas is small. 2 and H 2 With large S load and high purification degree, it is an acid gas removal agent with high efficiency and low energy consumption for chemical purification. But for a single absorbing CO 2 or H 2 S, the removal efficiency of MDEA will be very high, especially for CO 2 It will reach more than 95%. [00...
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