CN2913347Y - Arsenic removal device for drinking water based on novel film material - Google Patents

Abstract

The utility model relates to a device for removing arsenic from drinking water based on a novel membrane material, which comprises: a water inlet pipe; a pressure pump connected to the water inlet pipe; The polyvinyl chloride membrane material layer; the flow meter and the pressure gauge are arranged on the pipeline between the membrane module and the pressure pump; and the concentrated liquid discharge pipe and the permeated liquid discharge pipe are connected to the membrane module. While removing arsenic in drinking water, the utility model can further remove trace suspended solids and bacteria in the water without secondary pollution, has long service life, good effect and low cost, and is convenient to be used in various occasions, especially remote areas with high arsenic content .

Description

A device for removing arsenic from drinking water based on a new membrane material

technical field

The utility model relates to a drinking water treatment device, in particular to a device for removing arsenic from drinking water in groundwater arsenic polluted areas.

Background technique

Existing devices for removing arsenic from drinking water mostly use chemical precipitation, redox or ion exchange adsorption to remove arsenic by adding chemical agents, inorganic minerals, activated alumina, bone char and other agents or materials to the water. Low, high material cost, and there are disadvantages such as easy to cause secondary pollution, short material life cycle, remote high-arsenic mountainous areas or inconvenient use in rural areas.

Contents of the invention

The purpose of this utility model is to provide a new drinking water arsenic removal device based on a new membrane material, so as to overcome the above-mentioned unfavorable factors, improve the efficiency of arsenic removal, and reduce the treatment cost.

The purpose of the utility model can be achieved through the following processes: a device for removing arsenic from drinking water based on a novel membrane material of the utility model, which includes: a water inlet pipe; a pressure pump connected to the water inlet pipe; a membrane module connected to the pressure pump through the pipeline The membrane module is an electrospun chlorinated polyvinyl chloride membrane material layer; the flowmeter and pressure gauge are arranged on the pipeline between the membrane module and the pressure pump; and the concentrated liquid discharge pipe and the permeate discharge pipe are connected to the Membrane components.

The membrane material used in the utility model is made of chlorinated polyvinyl chloride through high-voltage electrospinning technology, and is composed of ultrafine nanofibers with micropores and large specific surface area, which can absorb and filter a part of suspended matter. Since the membrane material is a negatively charged membrane material, according to the mechanism of the Donnan equilibrium model, it can retain and remove arsenic in the form of anions by virtue of the ability to repel the same ions.

While removing arsenic in drinking water, the utility model can further remove trace suspended solids and bacteria in the water without secondary pollution, has long service life, good effect and low cost, and is convenient for use in various occasions, especially remote high-arsenic areas.

Description of drawings

Fig. 1 is the schematic diagram of the utility model device.

1: water inlet pipe 2: pressure pump

3: Flow meter 4: Pressure gauge

5: Membrane module 6: Concentrate discharge pipe

7: Permeate discharge pipe

Detailed ways

The task completion process of the utility model is further elaborated below in conjunction with the accompanying drawings: the arsenic-containing raw water enters the suction port of the pressure pump through the water inlet pipe 1, then enters the flow meter 3 after being pressurized by the pressure pump 2, and enters the membrane module after being measured by the flow meter 3 5. In membrane module 5, since arsenic in water mostly exists in the form of anions, and electrospun nanofibers are negatively charged, they are negatively charged membrane materials. According to the Donnan balance principle, arsenic anions are prevented from passing through one side of the membrane material, while The arsenic-free water passes through the membrane, so as to achieve the purpose of separating heavy metal arsenic. During filtration, the concentrated liquid is discharged or refluxed through the concentrated liquid discharge pipe 6, and the arsenic-free water permeated through the membrane is discharged through the permeate discharge pipe 7 according to the operation of the process for use by users. Among them, the pressure gauge 4 reflects the operating pressure of the membrane module, and according to the change of the operating pressure, the operating parameters such as the concentrated liquid discharge can be adjusted.

The utility model is further described below by means of examples.

Example 1

Take groundwater (turbidity, 1.4 degrees; total hardness (as CaCO ₃ ), 510mg.L ^-1 ; sulfate, 123.2mg.L ^-1 ; nitrate (as N), 60.2mg.L ^-1 ), directly Add Na ₂ HAsO ₄ to make experimental water sample, the concentration of arsenic is 5.013mg.L ^-1 , and the removal rate of arsenic reaches 50-70% after being filtered by electrostatic spinning chlorinated polyvinyl chloride membrane material.

Example 2

Take ground water (same as Example 1), directly add Na ₂ HAsO ₄ to make experimental water sample, the concentration of arsenic is 0.10 mg.L ^-1 , after filtering through electrospun chlorinated polyvinyl chloride membrane material, the concentration of arsenic in the effluent is 0.03mg.L ^-1 , the removal rate reaches 70%, and the concentration of arsenic is lower than the national drinking water standard (0.05mg.L ^-1 ).

The utility model has the advantages of adopting the negatively charged nanofiber membrane material as the filter material, no need to add chemicals, easy to use, high removal rate of arsenic, while removing arsenic in drinking water, it can further remove trace suspended solids, Bacteria, etc., no secondary pollution, long service life, good effect, low cost, convenient to use in various occasions, especially remote high arsenic areas.

Claims (1)

1. A device for removing arsenic from drinking water based on a novel membrane material, characterized in that it comprises: water inlet pipe (1); The pressure pump (2) is connected with the water inlet pipe; The membrane module (5) is connected to the pressure pump (2) through a pipeline, and the membrane module (5) is an electrospun chlorinated polyvinyl chloride membrane material layer; The flow meter (3) and the pressure gauge (4) are arranged on the pipeline between the membrane module (5) and the pressure pump (2); and The concentrate discharge pipe (6) and the permeate discharge pipe (7) are connected to the membrane module (5).