Automatic graded filtering tank device

Abstract

The invention relates to an automatic graded filtering tank device, comprising a tank body, a water collection pipe and a water distribution pipe, wherein a water inlet pipe, a water outlet pipe, a gas outlet pipe and a backwash exhaust water pipe are arranged above the tank body, a manhole and an observation hole are formed in a side face of the tank body, the water distribution pipe is arranged at the upper part of the inner part of the tank body, and is connected with the water inlet pipe, a hole mouth faces upwards, a backwash water inlet is formed in the water outlet pipe, a blow-down pipe is arranged below the tank body, a gas inlet pipe is arranged at the bottom of the inside of the tank body, the water collection pipe is located above the gas inlet pipe, and is connected with the water outlet pipe, a filtering plate is arranged between the water collection pipe and the water distribution pipe, a filtering material layer is arranged above the filtering plate, and a flowmeter and an electrically operated valve of the water inlet pipe are arranged on the water inlet pipe. According to the automatic graded filtering tank device disclosed by the invention, arrangement of filtering materials reverse to the grade is adopted, large-sized and large-proportion filtering materials are arranged at the bottom, and can be graded automatically after backwashing.

Description

technical field [0001] The invention relates to a filter device, in particular to an automatic grading filter tank device. Background technique [0002] The filter tank is a device for filtering under the action of pressure. It mostly adopts a vertical structure. According to the pressure difference between the inlet and outlet of the filter device, the filter material is backwashed to clean the impurities contained in the filter material layer, so as to maintain the filtration efficiency. Good filtration performance and water quality of filtered water. [0003] Most of the traditional filter tanks are arranged vertically. On the one hand, this kind of vertical filter tank has small filtration area, low filtration rate and large volume; in addition, it requires a lot of space for installation, which is inconvenient. [0004] Currently used filter devices, one type uses sand and gravel filter materials, such as quartz sand, anthracite, magnetite, etc. The filter materials us...

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Problems solved by technology

[0003] Most of the traditional filter tanks are arranged vertically. On the one hand, this kind of vertical filter tank has small filtration area, low filtration rate and large volume; in addition, it requires a lot of space for installation, and there are many inconveniences.

[0004] Currently used filter devices, one type uses sand and gravel filter materials, such as quartz sand, anthracite, magnetite, etc. The filter materials used in this type of filter device are cheap and easy to obtain, easy to clean and regenerate, and the cost is low, but there are filter materials. The disadvantages are low speed, high backwashing intensity, and easy mixing of filter materials after backwashing; the other type is to use fiber filter materials, such as fiber ball high-speed filter devices and long-fiber filter devices. It solves the above-mentioned problems of low filtration rate, high backwash intensity, and mixed layers of filter material after backwash, but there are also problems such as high cost, short service life, easy hardening of filter material, and difficulty in cleaning and regeneration.

[0005] The method of backwashing is controlled by the pressure difference between the inlet and outlet of the filter tank. When the filter material or filter medium changes, the corresponding relationship between the filter speed and the pressure difference will also change accordingly. The filter speed cannot be accurately controlled, nor can it Accurately control filtration cycle and backwash intensity

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