CN107188288B - A kind of water sulfide conversion device - Google Patents

Abstract

The invention relates to a sulfide conversion device in water, comprising a gas-controlled hydrogen generation pipe (1), a flat-bottomed flask (2), a separatory funnel (3), a fretting air release valve (4), a ground joint (5), The porous glass plate (6), the absorption bottle (7), the ground bottle stopper (8), the gas guide tube (9), and the gas-controlled hydrogen generation tube (1) are placed in the flat-bottomed flask (2), and the upper end is connected with a Gas valve (4), the tail end is placed at the bottom of the flat-bottomed flask, sodium borohydride is placed in the gas-controlled hydrogen generation tube (1), the separatory funnel (3) is connected with the flat-bottomed flask (2), and the flat-bottomed flask (2) is passed through the guide. The gas pipe (9) is connected with the absorption bottle (7), and the air outlet of the absorption bottle (7) is directly connected to the exhaust gas treatment device. Compared with the prior art, the present invention utilizes sodium borohydride to react with acid to generate hydrogen, instead of a gas release device composed of a hydrogen cylinder, a pressure reducing valve and a gas transmission pipe, and improves the safety of the device while ensuring the same conversion rate. and portability.

Description

A kind of water sulfide conversion device

technical field

The invention relates to a sulfide conversion device, in particular to a water sulfide conversion device, which is suitable for the conversion of various water sulfides such as drinking water and groundwater.

Background technique

Sulfide exists in many forms in water, which has a greater impact on water quality. The national standard methods for determination of sulfide in water are mainly spectrophotometry, iodometric method and gas-phase molecular absorption spectrometry. These methods all need to convert sulfide into hydrogen sulfide gas, and then absorb it with absorption liquid. The conversion rate of hydrogen sulfide is the most important indicator.

Chinese patent CN104071929B discloses a method for removing sulfide in water and a special device thereof. Two-stage electrochemical treatment is carried out with a two-pole chemical treatment device, and iron or its alloy is used as the anode. The first-stage electrochemical treatment uses anodization and the precipitation of ferrous ions produced by iron anode dissolution to treat high-concentration sulfide in water. Before the second-stage electrochemical treatment, an appropriate amount of hydrogen peroxide is added, and the Fenton reaction and electrocatalysis generated by the ferrous ions produced by the uniform dissolution with the anode and the electrochemical interaction are used to realize the rapid and low-concentration sulfide in water. Remove completely. However, this patent requires electrochemical treatment, which is complicated in structure and inconvenient to use.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a water sulfide conversion device with improved safety and portability while ensuring the same conversion rate in order to overcome the above-mentioned defects of the prior art.

The object of the present invention can be realized through the following technical solutions:

A sulfide conversion device in water is a glass structure, comprising a gas-controlled hydrogen generating tube, a flat-bottomed flask, a separatory funnel, a micro-moving gas release valve, a ground joint, a porous glass plate, an absorption bottle, a ground bottle stopper, and a gas guide tube. ,

The gas-controlled hydrogen generating tube is placed in a flat-bottomed flask, the upper end is connected with a micro-moving gas release valve, the tail end is placed at the bottom of the flat-bottomed flask, and sodium borohydride is placed in the gas-controlled hydrogen generating tube,

The separating funnel is connected with the flat-bottomed flask,

The flat-bottomed flask is connected with the absorption bottle through an air conduit, and the air outlet of the absorption bottle is directly connected to a tail gas treatment device.

The top of the gas-controlled hydrogen generating tube is provided with a grinding mouth joint, the lower end is provided with a porous glass plate, and sodium borohydride is placed between the grinding mouth joint and the porous glass plate. The porous glass plate used can not only allow the hydrogen generated by the reaction to overflow from the bottom, drive the generated hydrogen sulfide gas to escape to the greatest extent, and temporarily create space for the acid solution and sodium borohydride to control the reaction rate to a certain extent and improve the absorption rate. efficiency.

The flat-bottomed flask is connected with a separatory funnel, a gas guide pipe, and a gas-controlled hydrogen generation pipe to form an integrated device in which hydrogen sulfide and hydrogen are simultaneously generated and transported.

The separating funnel is connected to the flat-bottomed flask through a ground stopper, and concentrated acid is added dropwise to the sample.

The micro-moving air release valve adjusts the hydrogen production speed through the air pressure generated by hydrogen and the micro air release valve.

The said absorption bottle is filled with hydrogen peroxide and sodium hydroxide solution.

Take a certain amount of water sample in a flat-bottomed flask, tighten the fretting valve, and drop the concentrated acid into the sample through a separatory funnel, react with the sulfide in the water to generate hydrogen sulfide gas, and react with the hydroboration in the gas-controlled hydrogen generation tube. The sodium reacts to generate hydrogen, and the hydrogen drives the hydrogen sulfide into the absorption bottle through the gas pipe. The hydrogen sulfide gas is oxidized into sulfate by the hydrogen peroxide in the absorption bottle, and reacts with the lye to produce a sulfate solution to achieve the purpose of absorption. When the micro-actuated vent valve is closed, the hydrogen generated by the acid solution and sodium borohydride can create a space at the bottom of the gas-controlled hydrogen generating tube to isolate the reaction between the acid solution and sodium borohydride. Sodium hydride continues to react with the acid solution to generate hydrogen, which drives other hydrogen sulfide into the absorption bottle, which can adjust the overflow rate of hydrogen sulfide gas to a certain extent.

Compared with the prior art, the present invention has the following advantages:

1) Adopt the design that sodium borohydride reacts with acid solution to generate hydrogen to drive hydrogen sulfide gas into the absorption bottle, avoid using cylinder gas as carrier gas, save space to the greatest extent and increase operational safety factor;

2) The upper end of the gas-controlled hydrogen generation tube adjusts the amount of hydrogen generated by micro-moving the gas release valve, so as to avoid the instantaneous generation of gas, resulting in leakage or insufficient absorption, which is a unique design;

3) The hydrogen generation part is located at the low end of the flat-bottomed flask, which can drive hydrogen sulfide gas into the absorption flask to the greatest extent and improve the conversion efficiency;

4) Compact shape, all-glass structure, easy to operate.

Description of drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed ways

The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

Example

A sulfide conversion device in water, as shown in Figure 1, includes a gas-controlled hydrogen generation tube 1, a flat-bottomed flask 2, a separatory funnel 3, a micro-moving gas release valve 4, a ground joint 5, a porous glass plate 6, an absorption bottle 7, the ground bottle stopper 8, the gas guide tube 9, the gas-controlled hydrogen generator 1 is placed in the flat bottom flask 2 with the ground mouth, the upper end is connected with a micro-movement air release valve 4, the tail end is placed at the bottom of the flat bottom flask, the ground mouth joint 5 Sodium borohydride is placed in the middle of the porous glass plate 6, the separatory funnel 3 is connected to the flat-bottomed flask 2 through a ground stopper, and is used to add acid to the flat-bottomed flask. With a grinding port and an air outlet, the air outlet is directly connected to the exhaust gas treatment device. The specific operation process is as follows:

Take a certain amount of water sample in a flat-bottomed flask, tighten the fretting valve, and drop the concentrated acid into the sample through a separatory funnel, react with the sulfide in the water to generate hydrogen sulfide gas, and react with the hydroboration in the gas-controlled hydrogen generation tube. The sodium reacts to generate hydrogen, and the hydrogen drives the hydrogen sulfide into the absorption bottle through the gas pipe. The hydrogen sulfide gas is oxidized into sulfate by the hydrogen peroxide in the absorption bottle, and reacts with the lye to produce a sulfate solution to achieve the purpose of absorption. When the micro-actuated vent valve is closed, the hydrogen generated by the acid solution and sodium borohydride can create a space at the bottom of the gas-controlled hydrogen generating tube to isolate the reaction between the acid solution and sodium borohydride. Sodium hydride continues to react with the acid solution to generate hydrogen, which drives other hydrogen sulfide into the absorption bottle, which can adjust the overflow rate of hydrogen sulfide gas to a certain extent.

Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above-mentioned specific embodiments, and those skilled in the art can make various variations or modifications within the scope of the claims, which do not affect the essential content of the present invention.

Claims (6)

1. The device for converting sulfide in water is characterized by comprising a pneumatic control hydrogen generating pipe (1), a flat-bottomed flask (2), a separating funnel (3), a micro-motion gas release valve (4), a ground joint (5), a porous glass plate (6), an absorption bottle (7), a ground bottle stopper (8) and a gas guide pipe (9),

the pneumatic control hydrogen generating tube (1) is arranged in the flat-bottomed flask (2), the upper end of the pneumatic control hydrogen generating tube is connected with a micro-motion gas release valve (4), the tail end of the pneumatic control hydrogen generating tube is arranged at the bottom of the flat-bottomed flask, sodium borohydride is arranged in the pneumatic control hydrogen generating tube (1),

the separating funnel (3) is connected with the flat-bottom flask (2),

the flat-bottom flask (2) is connected with an absorption bottle (7) through an air duct (9), and an air outlet of the absorption bottle (7) is directly externally connected with a tail gas treatment device;

the top of the pneumatic control hydrogen generating tube (1) is provided with a ground joint (5), the lower end of the pneumatic control hydrogen generating tube is provided with a porous glass plate (6), and sodium borohydride is placed between the ground joint (5) and the porous glass plate (6).

2. The device for converting sulfides in water according to claim 1, wherein the flat-bottomed flask (2) is connected with the separating funnel (3), the gas-guide tube (9) and the gas-controlled hydrogen-generating tube (1) to form an integrated device for simultaneously generating and conveying hydrogen sulfide and hydrogen.

3. The device for converting sulfides in water as claimed in claim 1, wherein said separating funnel (3) is connected to the flat-bottomed flask (2) through a ground stopper, and concentrated acid is added dropwise to the sample.

4. The apparatus for converting sulfides in water as claimed in claim 1, wherein said micro-motion deflation valve (4) is used to adjust the hydrogen generation rate by the pressure of hydrogen generation and micro-deflation valve.

5. A device for conversion of sulphide in water according to claim 1, characterized in that said absorption bottle (7) contains hydrogen peroxide and sodium hydroxide solution.

6. An apparatus as claimed in claim 1, wherein the apparatus is of glass construction.

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