Backwash spray nozzle for granular filter material filter device

A filter device and backwashing technology, which is applied in the direction of loose filter material filter, filter separation, gravity filter, etc., can solve the problem of affecting the use effect of granular filter material, the particle size of granular filter material becomes smaller, and sticks together and other problems, to achieve the effect of reducing maintenance workload, eliminating backwash dead angle, and reducing height

Active Publication Date: 2014-03-05
武汉市汉江石油物资技术开发有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, mechanical agitation and scrubbing for backwashing of the filter material will make the particle size of the granular filter material smaller, the filter material will be lost, and the loss will be large. It is necessary to frequently replenish the lack of granular filter material. At the same time, mechanical agitation and scrubbing also exist. In the blind area of ​​backwashing, the granular filter material used for a long time is easily stuck together or compacted by oil stains without being washed, which affects the use effect of the granular filter material

Method used

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  • Backwash spray nozzle for granular filter material filter device
  • Backwash spray nozzle for granular filter material filter device
  • Backwash spray nozzle for granular filter material filter device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: a kind of backwashing nozzle that is used for granular filter material filtering device provided by the present invention, its structure is as follows figure 1 As shown, it includes a connecting head 1, an upper ring 2, a cylindrical body 3, a spout 4, a bottom plate 5 and a cone head 6. One end of the cylindrical body 3 is provided with an upper ring 2, and the upper ring is connected with the connecting head 1. The other end of the cylinder body 3 is provided with a bottom plate 5, and the bottom plate is provided with a cone head 6, and the cylinder body 3 is provided with two rows of evenly arranged spouts 4;

[0019] see figure 2 , 3 , the shape of the spout 4 of the nozzle of the present invention is cylindrical, the inner cavity of the spout is a combined structure of a trumpet tube and a straight circular tube, the spout 4 is installed on the wall of the cylinder 3, and the spout at the end of the cylinder 3 lumen The trumpet has a large mouth, ...

Embodiment 2

[0020] Embodiment 2: A kind of backwashing nozzle provided by the present invention, its structure is basically the same as that of Embodiment 1, the only difference is that only one row of nozzles 4 is arranged on the cylinder body 3, there are 18 nozzles in total, and the center of circle between the two nozzles The angles are equal, α=20°.

Embodiment 3

[0021] Embodiment 3: A kind of backwashing nozzle provided by the present invention, its structure is basically the same as Example 1, the difference is that three rows of nozzles are arranged on the cylinder, each row has 6 nozzles, and the central angles between the two nozzles are equal , α=60°, the first row of nozzles is aligned with the third row of nozzles, the second row of nozzles is misaligned with the first and third rows of nozzles, and the misalignment angle is 30°.

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Abstract

The invention relates to a backwash spray nozzle for a granular filter material filter device. The backwash spray nozzle comprises a connecting head, a cylinder body, nozzles and a base plate, wherein an upper ring connected with the connecting head is arranged at one end of the cylinder body, the base plate is arranged at the other end of the cylinder body, a cone head is arranged in the base plate, and 1-3 rows of nozzles are arranged on the cylinder body; 6-18 nozzles are arranged in one row, central angles alpha between every two adjacent nozzles in each row are equal, the nozzles in different rows are arrayed in a staggered manner, and staggering angles are equal to (1 / 2)alpha. In a use process, the spray nozzle is mounted at the bottom of a filter layer, a high-speed water inlet pipe and a high-speed air inlet pipe are communicated with each other, gas-water mixed liquid is ejected at high speed in a radial manner to drive peripheral filter materials to be diffused outwards at high speed to form three-phase flow of the gas, the water and the filter materials, the gas with the least specific gravity rapidly floats to penetrate through the whole filter layer due to a buoyancy effect, the three-phase flow is transversely and longitudinally covered, the filter materials are locally collided, rubbed and stirred with one another, and the three-phase flow transmits the energy to the periphery, so as to realize the effective backwash and regeneration of the whole filter layer. The backwash spray nozzle is simple in structure and good in backwash effect and is convenient to use.

Description

technical field [0001] The invention relates to a backwash nozzle used for a granular filter material filter device. Background technique [0002] Granular filter material filter is a sewage filtration equipment developed in China in the middle and late 1980s. Granular filter materials such as walnut shells, anthracite, quartz sand, corundum, magnetite, garnet, activated carbon, etc. are suitable for sewage filtration. filter material. For example, a common filter device that uses walnut shells as granular filter materials is a vertical steel circular container structure. The tank is filled with walnut shell filter materials. Oily sewage enters from the top and is filtered from top to bottom. The rear water drains from the bottom. After the granular walnut shell filter material is polluted, it is regenerated by backwashing. The backwash regeneration method is divided into clean water entering from the top or bottom of the filter, flushing the filter layer from top to bott...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D24/46
Inventor 李伟王亚力王成肖伟
Owner 武汉市汉江石油物资技术开发有限责任公司
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