CN1063154C

CN1063154C - Method for producing aqueous chlorine dioxide solution

Info

Publication number: CN1063154C
Application number: CN98118037A
Authority: CN
Inventors: 李全喜; 王桂兰
Original assignee: Individual
Current assignee: Individual
Priority date: 1998-08-06
Filing date: 1998-08-06
Publication date: 2001-03-14
Anticipated expiration: 2018-08-06
Also published as: CN1207364A

Abstract

The present invention relates to a method for producing an aqueous solution of chlorine dioxide. The present invention is characterized in that chlorine or an aqueous solution of the chlorine and hydrochloric acid is supplied to a water flow with certain pressure so as to form an aqueous solution containing the chlorine and acid, and the aqueous solution enters a chlorine dioxide generating room through a flowmeter. Meanwhile, an aqueous solution of sodium chlorite is added in the chlorine dioxide generating room through the flowmeter so that the two aqueous solutions can be mixed, react, and generate the aqueous solution of chlorine dioxide. The method has the advantages of safe production without environment pollution, the prepared aqueous solution of chlorine dioxide has high content of chlorine dioxide; the method also has the advantage of low cost and can be an ideal method for disinfection, sterilization, bleaching, decolorization and sewage treatment.

Description

Method and device for producing chlorine dioxide aqueous solution

The invention relates to a process and equipment for producing chlorine dioxide, in particular to a method and a device for producing a chlorine dioxide aqueous solution.

At present, two methods for producing chlorine dioxide are available, one is an electrolytic method, a chlorine dioxide generator is disclosed in the Chinese patent publication in 1991, the publication No. CN2102288.U, and the chlorine dioxide generator produces low content of chlorine dioxide; the other method is a chemical method which is an invention patent of Shandong university, ZL93111202.8, the method for producing the chlorine dioxide needs hydrochloric acid to react with sodium chlorate chemical materials, the chemical materials are strong corrosive agents or flammable, explosive and highly toxic products, and the chemical materials are dangerous in transportation, storage and operation and have higher cost.

The invention aims to provide a method and a device for producing a chlorine dioxide aqueous solution, which aim to solve the problem that the content of chlorine dioxide produced by an electrolytic method is low; chemical materials used for producing chlorine dioxide by a chemical method are dangerous in transportation, storage and use, and have the problems of high cost and the like.

The purpose of the invention is realized as follows: introducing chlorine or chlorine and hydrochloric acid aqueous solution into water flow with certain pressure to form hypochlorous acid and hydrochloric acid aqueous solution, metering the hypochlorous acid and hydrochloric acid aqueous solution by a flowmeter, entering a chlorine dioxide generating chamber, simultaneously pumping sodium chlorite aqueous solution into a pipe by a water injector, metering the chlorine dioxide aqueous solution by the flowmeter, adding the sodium chlorite aqueous solution into the chlorine dioxide generating chamber, mixing the two aqueous solutions, and carrying out chemical reaction to generate chlorine dioxide aqueous solution, wherein the chemical reaction formula is as follows:

the reaction is realized by a special chlorine dioxide aqueous solution generating device which comprises a chlorine device, a feeder, a chlorine dioxide generating chamber and a water inlet pipe, wherein the water inlet pipe is divided into 2 branch pipes, one branch pipe is connected with the chlorine dioxide generating chamber inlet pipe through a valve and a water ejector, a flowmeter is connected with the chlorine dioxide generating chamber inlet pipe, the water ejector is connected with the chlorine device through a connecting pipe, and the chlorine dioxide generating chamber is connected with a hydrochloric acid aqueous solution feeder through a pipe and a valve so that the solution entering the chlorine dioxide generating chamber becomes hypochlorous acid and hydrochloric acid aqueous solution; the other branch pipe is connected with a sodium chlorite aqueous solution feeder through a valve, and is also connected with the other inlet pipe of the chlorine dioxide generating chamber through a valve, a water injector and a flowmeter, the water injector is connected with the sodium chlorite aqueous solution feeder through a pipe and a valve, so that the aqueous solution containing sodium chlorite enters the chlorine dioxide generating chamber, and the upper end cover of the chlorine dioxide generating chamber is provided with a chlorine dioxide aqueous solution outlet pipe and a valve.

The chlorine generator is a chlorine generator or a chlorine tank chlorinator.

A chlorine dioxidegeneration chamber: the chamber body is cylindrical, and its lower end cover is the convex, and the outer lane equipartition has the bolt hole, and two inherent inlet pipes on the bottom surface, the inherent baffle in chamber body middle part, the inherent transition pipe in baffle center, transition pipe both ends are sealed, all are equipped with radial hole on the transition pipe upper and lower two part circumferences, and the inherent lid in chamber body upper end, its central inherent play head, play head lower extreme is sealed, and the inherent chlorine dioxide aqueous solution exit tube in upper end is equipped with radial hole on the circumference of lower part.

Compared with the prior art, the invention has the following advantages: 1) the content of chlorine dioxide is higher than that of chlorine dioxide produced by an electrolytic method; 2) if the chlorine gas device adopts a chlorine adding machine of a chlorine gas tank, the chlorine dioxide aqueous solution production device does not use electricity and can produce the chlorine dioxide aqueous solution by the pressure of tap water, thereby saving electric energy; 3) compared with a chemical method, the production cost is low; 4) the production process does not pollute the environment; 5) the commercial chlorine can be fully utilized, and the application range of the liquid chlorine is enlarged; 6) the sodium chlorite solution is adopted for production, and the use is convenient and reliable.

The following is further described with reference to the accompanying drawings:

FIG. 1 is a schematic diagram of a chlorine dioxide aqueous solution production apparatus;

fig. 2 is a diagram of components of a chlorine dioxide generation chamber.

In FIGS. 1-2: water meter (9), flowmeters (16), (17), valves (10), (14), (19), (20), (21), (23), water inlet pipe (8), branch pipes (11), (12), connecting pipe (7) and outlet pipe (22) are purchased outside.

The feeders (3) and (5) are made of plastic plates and are square, rectangular or cylindrical, the upper ends of the feeders are provided with a feed inlet and a cover, one side of the feeders is provided with a liquid level display tube (15) to display the height of the liquid level in the feeder, the other side of the feeders is provided with a tube, a valve (21) and a valve (14), the lower ends of the feeders are provided with skirt bases, and the skirt bases are fixed on the support (2) by bolts. The chlorine generator and the chlorine tank chlorine adding machine are adopted in the chlorine generator (6).

Chlorine dioxide takes place room (4), the room body (28) are cylindrically, adopt ABS plastics to make, its lower extreme cover (27) are the type of protruding, the outer lane equipartition has bolt hole (26), lean on the bolt fastening on support (2), inherent pipe (24), (25) of advancing on lower extreme cover (27) bottom surface, inherent radial baffle (30) in the internal middle part of room, baffle center glues or welds and has fixed transition pipe (29), the transition pipe both ends are sealed up, on the transition pipe, be equipped with 2 at least radial holes on the circumference down, inherent lid (32) in room body upper end, its center glues or welds and has fixed play head (31), the inherent chlorine dioxide aqueous solution exit tube (22) in play head upper end, valve (23), the lower extreme is sealed up, be equipped with 2 at least radial holes on the circumference of lower part.

For convenient movement, a base (1) is arranged below the support (2) and the chlorine device (6). One end of a water inlet pipe (8) is connected with a tap water pipe and a water meter (9), tap water has certain pressure, the other end of the tap water is divided into two branch pipes (11) and (12), the branch pipes (11) are connected with a pipe (25) of a chlorine dioxide generating chamber (4) through a valve (10), a water ejector (13) and a flowmeter (16), one connector of the water ejector (13) is connected with a chlorine gas device (6) through a connector connecting pipe (7), the other connector is connected with a hydrochloric acid aqueous solution feeder (5) through a pipe and a valve (14), chlorine gas and hydrochloric acid aqueous solution flow along with the water inlet through the water ejector (13) and are pumped into the branch pipes to form hypochlorous acid and hydrochloric acid aqueous solution, and the hypochlorous; the branch pipe (12) is connected with a sodium chlorite aqueous solution feeder (3) through a valve (20), and is connected with a chlorine dioxide generating chamber inlet pipe (24) through a valve (19), a water ejector (18) and a flowmeter (17), the joint of the water ejector (18) is connected with the sodium chlorite aqueous solution feeder (3) through a pipe and a valve (21), the sodium chlorite aqueous solution is pumped into the branch pipe (12) along with the flow of water through the water ejector (18), and is metered into the chlorine dioxide generating chamber (4) through the flowmeter (17) to be mixed with the hypochlorous acid and the hydrochloric acid aqueous solution for chemical reaction to generate the chlorine dioxide aqueous solution, and the reaction formula is as follows:

adopting chlorine and water to generate hypochlorous acid and hydrochloric acid aqueous solution, and mixing the hypochlorous acid and the sodium chlorite aqueous solution for reaction to generate chlorine dioxide aqueous solution; if chlorine, hydrochloric acid and water are adopted to generate hypochlorous acid and hydrochloric acid aqueous solution which are mixed and reacted with sodium chlorite aqueous solution, chlorine dioxide aqueous solution can also be generated, and the method is suitable for disinfection, bleaching, decoloration and sewage treatment.

Claims

1. A method for producing an aqueous solution of chlorine dioxide, comprising: chlorine or chlorine and hydrochloric acid aqueous solution are introduced into water flow with certain pressure to form hypochlorous acid and hydrochloric acid aqueous solution, the hypochlorous acid and hydrochloric acid aqueous solution are metered by a flowmeter and enter a chlorine dioxide generating chamber, meanwhile, sodium chlorite aqueous solution is metered by the flowmeter and added into the chlorine dioxide generating chamber, the two aqueous solutions are mixed and react to generate chlorine dioxide aqueous solution, and the chemical reaction formula is as follows:

。

2. a production device of chlorine dioxide water solution is characterized in that: is composed of a chlorine gas device (6), feeders (3) and (5), a chlorine dioxide generating chamber (4) and a water inlet pipe (8), and is characterized in that: the water inlet pipe (8) is divided into two branch pipes (11) and (12), the branch pipe (11) is connected with a chlorine dioxide generating chamber inlet pipe (25) through a valve (10), a water injector (13) and a flowmeter (16), the water injector is connected with a chlorine gas device (6) through a connecting pipe (7), and is connected with a hydrochloric acid aqueous solutionfeeder (5) through a pipe and a valve (14); the branch pipe (12) is connected with a chlorine dioxide generating chamber inlet pipe (24) through a valve (19), a water ejector (18) and a flow meter (17), the water ejector (18) is connected with a sodium chlorite aqueous solution feeder (3) through a pipe and a valve (21), and a chlorine dioxide aqueous solution outlet pipe (22) and a valve (23) are arranged on an upper end cover (32) of the chlorine dioxide generating chamber.

3. The production device according to claim 2, wherein: the chlorine gas generator (6) is a chlorine gas generator or a chlorine adding machine of a chlorine gas tank.

4. The generator of claim 2, wherein: chlorine dioxide takes place room (4), the room body (28) are cylindrically, its lower end cover (27) are the convex, the outer lane equipartition has bolt hole (26), inherent pipe (24), (25) of advancing on the bottom surface, inherent baffle (30) in room body middle part, inherent transition pipe (29) in baffle center, the transition pipe both ends are sealed up, be equipped with radial hole on the transition pipe, be equipped with radial hole on the two parts circumference of lower part, inherent lid (32) in room body (28) upper end, inherent odd (31) in its center, odd (31) lower extreme is sealed up, the inherent chlorine dioxide aqueous solution exit tube (22) in upper end, be equipped with radial hole on the circumference of lower part.