Online monitoring and diagnosis device and method for intelligent pre-filter

Abstract

The invention provides an online monitoring and diagnosis device and method for an intelligent pre-filter. The device comprises an intelligent sample distribution system and an intelligent diagnosis unit, wherein the intelligent sample distribution system and the intelligent diagnosis unit are sequentially connected to the pre-filter, and additionally, the intelligent diagnosis unit is sequentially connected with a pre-filter operation PLC (programmable logic controller) upper computer and a pre-filtration operation PLC through a communication interface; the intelligent sample distribution system comprises a sample cooling device, a sample distribution device and an online laser particle counter; the intelligent diagnosis unit comprises a switch, a diagnosis assessment module and a communication interface module; the intelligent sample distribution system monitors the quantity, the size, and particle size distribution indexes of suspended particles in multiple paths of water samples and transmits data to the intelligent diagnosis unit, and the intelligent diagnosis unit acquires operation data of the pre-filter from a program control system. Single and comprehensive analysis assessment indexes are adopted, the operation conditions of the pre-filter and a unit are comprehensively diagnosed and assessed, real-time and intelligent instructions are provided for operation of the pre-filter, and the operation level is improved.

Description

technical field [0001] The present invention relates to the removal of iron or suspended solids from condensed water in power plants, boiler feed water, and hydrophobic water, as well as wire-wound filters for removing iron or suspended solids from condensed water, hydrophobic water, emulsions, and degreasing liquids in petrochemical and metallurgical industries. The invention relates to pre-filters such as powder resin covering filter, pleated filter, large-flow filter and melt-blown filter, and specifically relates to an intelligent pre-filter online monitoring and diagnosis device and method. Background technique [0002] With the increase of parameters and capacity of power plant units, higher requirements are put forward for the condensate fine treatment system, which requires the removal of a large amount of iron corrosion products in the condensate water. After the effluent quality of the fine treatment system reaches the standard value of GB / T12145-2008 can be reused...

AI Technical Summary

Problems solved by technology

[0003] The pre-filter mainly uses the iron content of the effluent and the pressure difference between the inlet and outlet as the operation control indicators. However, due to the relatively complicated and low stability of the iron content measurement methods (spectrophotometry, atomic absorption method, etc.), the general situation of the staff The iron content of the inlet and outlet water is only measured once a week, and the operating status of the pre-filter cannot be indicated in real time. In most cases, the pressure difference between the inlet and outlet is used as the only operation control index of the pre-filter, which leads to Many problems in the operation of the filter cannot be found in time, especially when the filter element is damaged, but the pressure difference rises slowly and the pre-filter operation period is prolonged, which eventually leads to a large amount of particulate pollutants such as iron corrosion products leaking from the pre-filter

In addition, the pre-filter system also has problems such as powder resin leakage, incomplete backwashing of filter elements, which shortens the operating cycle to varying degrees, and serious pollution of filter elements that cannot operate normally. , which in turn affects the economy and safety of the system, and directly affects the safe and stable operation of the thermal system

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