Sand washing method and special device thereof

A special device, sand washing technology, applied in chemical instruments and methods, wet separation, solid separation, etc. The problem of poor sand experiment effect, etc., can achieve the effect of good sand washing effect, cost saving and space reduction.

Active Publication Date: 2012-06-20
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the amount of sediment is relatively small, the purpose of the experiment can be achieved by directly cleaning it manually; but when a large amount of sediment is used in the experiment in the tank, the workload of cleaning the sediment becomes particularly large
In order to save manpower and time, tap water is usually used for simple flushing to remove soil and floating debris in the sediment, but it is difficult to remove metals, colloids, microorganisms and other impurities adsorbed in the sediment
Because the sediment cleaning is not clean enough, it often leads to the poor effect or failure of the whole environmental sediment experiment.

Method used

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  • Sand washing method and special device thereof
  • Sand washing method and special device thereof
  • Sand washing method and special device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Embodiment 1: as figure 1As shown, the special device for washing sand of the present invention includes a water tank 1, a water pump 2 and an organic glass sand washing column 3, and the water tank 1 is connected with the water pump 2 and the organic glass sand washing column 3 successively through water pipes; The glass sand washing column 3 has a height of 160cm and an inner diameter of 19cm, and can clean 40Kg of sand each time; the plexiglass sand washing column is divided into the water inlet buffer zone 3-1, the sand column area 3-2 and the overflow zone according to the flow direction. Zone 3-3; the water inlet buffer zone 3-1 is distributed at the lowermost end of the plexiglass sand washing column 3, and a porous plexiglass tube buffer 4 is arranged at the water inlet; the water inlet buffer zone 3- 1 and the sand column area 3-2 are separated by four 0.5T / h cloth water caps 5 uniformly distributed in the ring, and when the water flow enters the plexiglass san...

Embodiment 2

[0040] Embodiment 2: The present invention adopts different cleaning methods for different silt to be cleaned to remove various impurities contained in the silt to be cleaned in a targeted manner. In this embodiment, the coarsely washed silt is taken as an example. Specifically include the following steps:

[0041] (1) Sand loading: put the sand to be cleaned into the sand washing column;

[0042] (2) (2-1) Washing: Use deionized water to circulate and wash 4 times from the lower end of the sand washing column to the upper end, and wash for 45 minutes each time to remove impurities and colloidal particles; because there are many initial impurities, in order to achieve optimal washing For the sand effect, drain outward for 6 minutes through overflow water management at the first start, and drain outward for 3 minutes through overflow water management at the beginning for the rest.

[0043] Add 100L of deionized water to the water tank each time. Considering that the concentra...

Embodiment 3

[0048] Embodiment 3: This embodiment takes the cleaning of the bed sand after the metal ion adsorption experiment as an example, and specifically includes the following steps:

[0049] (1) Sand loading: put the sand to be cleaned into the sand washing column;

[0050] (2) pickling: after carrying out the metal ion adsorption experiment, certain metal ions were adsorbed on the bed sand surface, in order to more effectively remove the metal adsorbed on the bed sand surface, soak for 2 days with an acid solution with a pH value of 3.5; Then wash it once with deionized water for about 1 hour; finally, wash it with an acid solution with a pH value of 3 for 12 hours to desorb the metal adsorbed on the sand surface and remove the metal in the sand;

[0051] (3) Cleaning with deionized water: after pickling, use deionized water to circulate and wash 4 times from the lower end of the sand washing column to the upper end, each time is about 45 minutes, and clean the desorbed metal ions ...

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PUM

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Abstract

The invention discloses a sand washing method, which comprises following steps: sand filling, washing, or / and pickling or / and alkali washing, deionized water cleaning, sand storage and the like. The invention further discloses a special device for the sand washing method. The sand washing device comprises a sand column tube and a water tank, the sand column tube is divided into a water inlet buffering area, a sand column area and an overflow area according to a water flowing direction, the water inlet buffering area is separated from the sand column area via four water distribution caps which are annularly uniformly distributed, a cylindrical buffering device is mounted on the water inlet buffering area, an inner cylinder of the cylindrical buffering device is in through connection with a water outlet of the water tank via a water delivery pipe, the overflowing area is provided with an overflowing pipe, a water outlet of the overflowing pipe is suspended above a liquid inlet of the water tank, and a filtering screen is mounted at the liquid inlet of the water tank. By the aid of organic combination of the deionized water cleaning, the pickling and the alkali washing to sand, metal ions, colloid particles, microorganisms and other impurities in the sand are effectively removed.

Description

technical field [0001] The invention relates to a sand washing method and a special device thereof, belonging to the technical fields of water conservancy engineering, environmental engineering and marine engineering. Background technique [0002] When doing environmental sediment experiments, in order to achieve the purpose of the experiment, very clean sediment is usually required. In order to remove the impurities and adsorbates carried in the sediment, it is necessary to design a set of reasonable devices and operating methods. [0003] In previous practice, when doing the above-mentioned sediment experiments, the sediment was usually cleaned manually. When the amount of silt is relatively small, the purpose of the experiment can be achieved by directly cleaning it manually; but when a large amount of silt is used in the experiment in the tank, the workload of cleaning the silt becomes particularly large. In order to save manpower and time, tap water is usually used fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B03B5/62
Inventor 金光球钟小春丁海波杨小全李凌
Owner HOHAI UNIV
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