Method for measuring pH value of slurry in absorption tower for wet flue gas desulfurization
A wet flue gas desulfurization and measurement method technology, applied in the field of flue gas desulfurization, can solve the problems of pH meter wear, high operating cost, and high device operation requirements
Pending Publication Date: 2021-09-10
长沙康欧创新科技有限公司
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Problems solved by technology
[0011] The purpose of the present invention is to provide a measuring device and a measuring method for measuring the pH value of the slurry in a wet flue gas desulfurization absorption tower, which can effectively solve the problems of pH meter wear, easy blockage of the device, high requirements for device operation, low fault tolerance rate, and high operating cost, and Simple operation, both manual and electric control
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[0035] The working process of the measuring device: during normal operation, the pulp tank of the absorption tower is filled with slurry and has a relatively high liquid level, and the sampling port 2 is generally located at the lower part of the pulp tank, so there is a certain static pressure at the sampling port 2. After the sampling port switch valve 3 is opened, the slurry flows out from the absorption tower 14 under the action of pressure, and the slurry flows through the sampling port 2 and the inlet pipe 6 into the pH meter measuring cylinder 9 with a pH meter inserted therein, and the outlet is adjusted by controlling the valve 12 To ensure that the pH meter measuring cylinder is filled with slurry to ensure that the pH meter probe is immersed in the slurry. At the same time, the valve opening of the outlet regulating valve 12 should not be too large to ensure that the flow rate in the pH meter measurement cylinder is controlled at a low level to prevent the wear of th...
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The invention provides a method for measuring the pH value of slurry in an absorption tower for wet flue gas desulfurization, which uses a measuring device. The device comprises an inlet pipeline, a sampling port switch valve, a pH meter measuring cylinder, outlet adjusting valves arranged at the downstream and the lower part of the pH meter measuring cylinder, and a pH meter mounting port, wherein the pH meter mounting port is arranged to be in an inclined state so as to enable a probe of the pH meter inserted into the pH meter mounting port to be inserted downwards in an inclined manner, and the angle between the axis of the pH meter mounting port and the horizontal plane is 15-65 degrees; The measuring device further comprises a flushing water pipe and a flushing water switch valve which are connected to an inlet pipeline at the downstream of the sampling opening switch valve, wherein the inner diameter or equivalent inner diameter of the pH meter measuring cylinder is more than two times of the inner diameter of the inlet pipeline. The measuring method comprises two steps of measuring the pH value of the slurry and flushing the device. According to the method and the device, the slurry in all areas is always in a flowing state, so that deposition and blockage are avoided, and the pH value of the slurry is stably and accurately measured.
Description
technical field [0001] The invention belongs to the field of flue gas desulfurization, and in particular relates to a method for measuring the pH value of slurry in an absorption tower of wet flue gas desulfurization. Background technique [0002] The invention is mainly applied to the field of limestone (lime)-gypsum wet flue gas desulfurization. Limestone (lime)-gypsum wet desulfurization (WFGD) technology is the mainstream flue gas desulfurization technology worldwide, with the advantages of mature technology, high desulfurization efficiency, stable operation, wide range of coal types, easy-to-obtain absorbent and low price, etc. . It is widely used in flue gas desulfurization in thermal power plants, steel sintering, etc. [0003] In the wet flue gas desulfurization process, the slurry in the absorption tower is mainly used to contact the flue gas countercurrently to remove SO in the flue gas. 2 pollutants such as SO 2 It has good solubility in water and can cause a ...
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Patent Timeline
Login to View More IPC IPC(8): G01N33/00B08B9/093B01D53/80B01D53/50
CPCG01N33/00B08B9/0813B01D53/80B01D53/502B01D2258/0283B01D2251/404
Inventor 王刚莫海清
Owner 长沙康欧创新科技有限公司