Deformation of the black water filter screen and screen replacement issues
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In our company’s gasification furnace, the filters in the quench water pipeline tend to deform quite quickly after short periods of operation (usually within about a month). Moreover, during normal operation of the gasification furnace, the pressure difference across these filters easily rises to the high alarm level. Process operators are required to clean the filters every eight hours on average. The filters used in our plant have a conical structure, with the base at the bottom and the opening at the top. These filters are designed to be thicker, which helps keep the suspended solids in the gray water at levels below 50. Regarding this issue, we would like to ask the experts the following questions: 1. What is the structural design and installation method of the filters used in your companies? What are the porosity and thickness of those filters? 2. What are the water quality control and monitoring indicators for various sister organizations? How is the water quality of the black water from carbon scrubbing towers and gasification furnaces analyzed? 3. What are the steps for switching and cleaning the filters in the black water filters at your respective organizations? 4. Regarding the problems that have arisen in our company, we kindly ask everyone to offer their suggestions.
It is recommended to choose an automatic backwash filter, which features high mechanical strength, filters that are not prone to damage, and an operating pressure that can reach 5 MPa. Those interested can visit WWW.CHINA-HMT.COM for more information.
You have two questions now, right? 1. The filter screen is prone to deformation. 2. The filter screen becomes severely clogged in a short period of time, resulting in an increase in pressure drop and triggering an alarm. 1. The filter screen deforms, possibly due to insufficient strength of the screen itself or inadequate reinforcement, or as a result of improper pressure application. I’m not sure whether you are using domestic or imported filters. During use, the filter screen must be supported by orifice plates and reinforcing ribs. 2. Clogging of the filter screen leads to an increase in pressure drop; this is related to factors such as defects that occur during the sintering of the filter screen, impurity content, particle size, filtering area, pore size of the filter screen, and the bulk density of the material.
Tapered filters are prone to deformation; it is advisable to use hemispherical filters or add reinforcing ribs. During the start-up and shutdown of the vaporization furnace, scale on the inner walls of the pipes falls off as a result of alternating heat and cold conditions. It is recommended to establish a water circulation system and allow water to flow through the filters for 10 minutes before use, with the water being discharged from the bottom