摘要:
PROBLEM TO BE SOLVED: To provide a wet desulfurization apparatus in which it is possible to operate the absorption tower so that solid deposits are not deposited even when the salt concentration in the absorption fluid (waste fluid) stored inside the fluid-storing unit is high; and a method for operating the wet desulfurization apparatus.SOLUTION: A method for operating wet desulfurization apparatuses, which perform desulfurization by causing gas-liquid contact between an absorption fluid stored in an absorption tower and a gas to be processed that is introduced into the absorption tower comprises: a step of measuring the salt concentration of the absorption fluid stored in the absorption tower; a step of measuring the fluid temperature of the absorption fluid; a step of determining whether or not to heat the absorption fluid based on the salt concentration and the fluid temperature; and a step of heating to a target temperature at which solid deposits will not be deposited at the salt concentration of the absorption fluid when it is determined that the absorption fluid is to be heated in the processing step.
摘要:
PROBLEM TO BE SOLVED: To provide a wet exhaust gas purification device that enables the simple cleaning/removal of PM accumulated in a demister, enables the use of a demister with porosity of high collection efficiency, and exhibits high exhaust gas purification efficiency.SOLUTION: After converting PM that is accumulated inside a demister 50 (51) and that contains an oil component into a low viscosity liquid using heated wash water, the wet exhaust gas purification device sprays the heated wash water, so that the wash time and volume of wash water required for cleansing/removal are negligible. After cleansing/removal, the demister 50 (51) can be re-used in a state that is almost as good as a new one, thus allowing to avoid problems of an increase in the pressure drop between the gas stream upstream side and the gas stream downstream side of the demister 50 (51), an increase in the power of a suction blower 7 due to the increase in the pressure drop, and insufficient exhaust gas suction which is caused as the suction capacity of the suction blower 7 is exceeded.
摘要:
PROBLEM TO BE SOLVED: To provide an EGR device capable of easily adjusting an EGR rate from 0% to a predetermined ratio.SOLUTION: An EGR device 50 extracts a part of an exhaust gas discharged from an engine 10 from an exhaust flow channel 20, and sends the extracted exhaust gas to a supply flow channel 30 having a pressure higher than the exhaust flow channel 20. The EGR device 50 includes an EGR blower 54 for raising a pressure of the extracted exhaust gas, and a check valve 56 positioned at a supply flow channel 30 side with respect to the EGR blower 54 for preventing a supply gas supplied to the engine 10, from flowing to an EGR blower 54 side from the supply flow channel 30.
摘要:
PROBLEM TO BE SOLVED: To provide a wet exhaust gas purification device that enables the simple removal of PM accumulated in a demister, enables the use of a low porosity, high collection efficiency demister, and exhibits high exhaust gas purification efficiency.SOLUTION: This wet exhaust gas purification device uses a heating means for heating a demister 50 (51) to heat it to a temperature (60°C) at which the viscosity of PM that is accumulated in the demister 50 (51) and that contains an oil component reaches a low viscosity, or a temperature (equal to or more than 600°C) at which the PM that contains an oil component self ignites. As a result, PM which has been softened into a liquid state and has begun to form drips can be washed away by wash water (at a normal temperature or heated). Alternatively, after the PM has been burned away, any residue can be completely removed. Thus, the wash time and volume of wash water required for the removal of the PM are negligible. After the removal of PM, the demister 50 (51) can be re-used in a state that is almost as good as new.