CN1488571A - High-pure chlorinedioxide generator apparatus - Google Patents
High-pure chlorinedioxide generator apparatus Download PDFInfo
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- CN1488571A CN1488571A CNA021311293A CN02131129A CN1488571A CN 1488571 A CN1488571 A CN 1488571A CN A021311293 A CNA021311293 A CN A021311293A CN 02131129 A CN02131129 A CN 02131129A CN 1488571 A CN1488571 A CN 1488571A
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- chlorine dioxide
- hydrogen peroxide
- sulfuric acid
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Abstract
The high purity chlorine dioxide generator comprises water supplying system, feeding system, pouring system, reaction system and control system. The reaction system uses a mixer which mixes the sodium chlorate and hydrogen peroxide, and a reaction pole which uses a compound to react with sulfuric acid; the device operation cost is low, the purity is high, and the material conversion rate reach 90%.
Description
Technical Field
The invention relates to a chemical reaction device, in particular to a high-purity chlorine dioxide generator device.
Background
Chlorine dioxide is a high-efficiency broad-spectrum sterilization disinfectant, and can be widely applied to urban water supply, tap water, urban secondary water supply and community high-quality water supply for disinfection; oxidation, decoloration, deodorization and disinfection treatment of urban sewage, industrial wastewater and hospital sewage; industrial cooling water, reclaimed water reuse and swimming pool water sterilization and algae removal treatment; oil field flooding unblocking treatment, bleaching treatment in papermaking, printing and dyeing industry; and (3) carrying out oxidative degradation treatment on the cyanide and phenol containing wastewater. In these application fields, high conversion rate of raw materials, high purity of chlorine dioxide in chlorine dioxide solution and low operation cost are required to meet the requirements.
At present, the existing chlorine dioxide generator devices at home and abroad mainly adopt two modes: composite and high purity chlorine dioxide generator devices. The compound method is that under the heating condition, the raw materials of sodium chlorate and hydrochloric acid are added into a reactor for reaction, the mixture of the generated chlorine dioxide and chlorine gas is absorbed into water by vacuum formed by a water ejector and mixed, and then the mixture is added into the water to be treated. The composite chlorine dioxide generator uses sodium chlorate as main raw material, and its operation cost is relatively low, but its raw material conversion rate is low, and the purity of chlorine dioxide in the product is not high, and the chlorine content in the product is 50%, so that the application of said equipment is limited. The high-purity chlorine dioxide generator uses sodium chlorite as main raw material, and makes it react with chlorine gas or hydrochloric acid in reaction column, and its raw material conversion rate is high, and the chlorine dioxide content in the product is up to 95%. The high-purity sodium chlorite is used as a main raw material, and the operation cost is relatively high, so that the expansion of the application range of the sodium chlorite is prevented.
Disclosure of Invention
The invention aims to provide a high-purity chlorine dioxide generator device. The invention also aims to provide a method for preparing high-purity chlorine dioxide by using sodium chlorate as a main raw material.
The invention is realized by the following steps: the high-purity chlorine dioxide generator device consists of a water supply system, a feeding system, a reaction system and a control system, wherein the reaction system adopts a mixer for fully mixing sodium chlorate and hydrogen peroxide and a reaction column for reacting the mixture with sulfuric acid; the mixer is made of PVC, PVDF or Teflon material, and PVDF or Teflon filler is filled in the mixing area; the reaction column is made of PVC, PVDF or Teflon material, PVDF or Teflon filler is filled in the reaction area, an interlayer is arranged between the inner shell and the outer shell of the reaction column, and cooling water flows in the middle;
the preparation method of the high-purity chlorine dioxide comprises the following steps: the method comprises the following steps of reacting 30-50% of sodium chlorate serving as an oxidant and 24-30% of hydrogen peroxide serving as a reducing agent in a 70-75% sulfuric acid medium, wherein the raw materials are as follows: NaClO3∶H2SO4∶H2O20.8-1.2: 0.1-0.3; the reaction formula is as follows: 。
drawings
The invention is described in detail below with reference to the attached drawing figures:
FIG. 1 is a schematic diagram of a mixer
FIG. 2 is a view showing the structure of a reaction column
FIG. 3 is a schematic block diagram of a chlorine dioxide generator
Detailed Description
The structure of the mixer is shown in figure 1, a sodium chlorate inlet 1, a hydrogen peroxide inlet 2, a mixing area 3, a mixer shell 4 and a mixed liquid outlet 5.
The structure of the reaction column is shown in figure 2, wherein 6 mixed liquid inlet, 7 sulfuric acid inlet, 8 cooling water inlet, 9 reaction column outer shell, 10 cooling water flowing area, 11 reaction column inner shell, 12 chlorine dioxide solution outlet, 13 cooling water outlet and 14 reaction area.
The mixer is made of PVC, PVDF or Teflon material, the length of the mixer is 70 cm, and PVDF or Teflon filler is filled in a mixing area. The raw material sodium chlorate enters from a sodium chlorate inlet (1), and the hydrogen peroxide enters from a hydrogen peroxide inlet (2). The two raw materials vertically collide at an inlet and enter a mixer; and the lower part is fed in and the upper part is discharged out, so that the sodium chlorate and the hydrogen peroxide are fully mixed.
The reaction column is made of PVC, PVDF or Teflon material, and the reaction area is filled with PVDF or Teflon filler. An interlayer is arranged between the inner shell and the outer shell of the reaction column. The mixed liquid enters the reaction column from a mixed liquid inlet (6) and the sulfuric acid enters the reaction column from a sulfuric acid inlet (7). The mixed liquid and the sulfuric acid enter and go out from the bottom to ensure the full reaction of the raw materials. Tap water enters a cooling water flowing area (10) between the outer shell (9) and the inner shell (11) of the reaction column from a cooling water inlet (8), namely a so-called interlayer between the outer shell and the inner shell of the reaction column, and flows out from a cooling water outlet (13) to take away heat generated when the sulfuric acid reacts with the mixture.
As can be seen from the attached figure 3, the tap water enters the equipment from the water inlet and then is divided into two paths, wherein one path of tap water is pressurized by the booster pump, then passes through the detection device and the pressure regulating device to form water with stable flow and pressure, and then enters the water injector, so that constant vacuum is generated in the reaction column and the raw material mixer, and the chemical reaction is completed under a vacuum system; the other water source enters an interlayer of the reaction column to play a cooling role. The chemical raw materials of sodium chlorate and hydrogen peroxide are accurately metered by a metering pump, enter a mixer from the bottom in proportion, are fully mixed in the mixer, enter a reaction column, and fully react with sulfuric acid passing through the metering pump in the reaction column to generate high-purity chlorine dioxide stock solution. The high-concentration chlorine dioxide solution in the reaction column enters the water injector to form a safe-concentration chlorine dioxide solution, and the chlorine dioxide solution is sent out from the chlorine dioxide outlet and added into the water to be treated.
The reaction column, the mixer and the metering pump are connected by hoses, and the reaction column, the water ejector and the inlet and outlet pipes of the water ejector are connected by hard UPVC pipes.
A water flow switch is arranged in the water supply system, and once no water flow exists or the water flow pressure is too low, the feeding of the metering pump is stopped immediately so as to ensure the safety of the equipment; the cooling water in the interlayer on the reaction column is used for reducing the temperature of the reaction column and is another safety protection device.
The controller is used for controlling the three metering pumps, the water flow switch and the booster pump and controlling the normal operation of the generating device.
The device provided by the invention has low operation cost (the costof generating 1 g of chlorine dioxide is 1.0-1.3 min), the purity of the generated chlorine dioxide is high, and the conversion rate of raw materials is more than 90%.
Examples
The preparation method of the high-purity chlorine dioxide comprises the following steps: 40% sodium chlorate is used as oxidant, 27% hydrogen peroxide is used as reducer, and the sodium chlorate and the hydrogen peroxide react in 72% sulfuric acid medium, and the proportion of the raw materials is as follows: NaClO3∶H2SO4∶H2O21: 0.2; the reaction formula is as follows: 。
the chemical raw materials of sodium chlorate and hydrogen peroxide are accurately metered by a metering pump, enter a mixer from the bottom in proportion, are fully mixed in the mixer, enter a reaction column, and fully react with sulfuric acid passing through the metering pump in the reaction column to generate high-purity chlorine dioxide stock solution, and high-concentration chlorine dioxide stock solution in the reaction column enters a water injector to be mixed with water to form safe-concentration chlorine dioxide solution, and is sent out from a chlorine dioxide outlet and added into water to be treated.
Claims (9)
1. A high-purity chlorine dioxide generator device comprises a water supply system, a feeding system, a dosing system, a control system and a reaction system, and is characterized in that the reaction system adopts a mixer for fully mixing sodium chlorate and hydrogen peroxide and a reaction column for reacting the mixture with sulfuric acid.
2. The high purity chlorine dioxide generator unit of claim 1, wherein said mixer is formed from PVC, PVDF or teflon material, and the mixing region contains PVDF or teflon filler; the reaction column is made of PVC, PVDF or Teflon material, and the reaction area is filled with PVDF or Teflon filler.
3. The high purity chlorine dioxide generator apparatus of claim 2, wherein said mixer is 70 centimeters in length.
4. The apparatus according to claim 1, wherein the reaction column has an interlayer between the inner and outer shells.
5. The apparatus according to claim 1, wherein the reaction column has an interlayer between the inner and outer shells, and cooling water flows in the interlayer.
6. The preparation method of high-purity chlorine dioxide is characterized by that said method uses 30-50% sodium chlorate as oxidant, uses 24-30% hydrogen peroxide as reducing agent, and makes them produce reaction in 70-75% sulfuric acid medium, and the raw material feeding ratio is: NaClO3∶H2SO4∶H2O20.8-1.2: 0.1-0.3; the reaction formula is as follows: 。
7. the method of claim 6, wherein 40% sodium chlorate is used as oxidant, 27% hydrogen peroxide is used as reducer, and the reaction is carried out in 72% sulfuric acid medium, wherein the raw materials enter into the ratio: NaClO3∶H2SO4∶H2O2＝1∶1∶0.2。
8. The high-purity chlorine dioxide generator device is characterized in that 24-30% of hydrogen peroxide is usedas a reducing agent and reacts in a 70-75% sulfuric acid medium, and the raw materials enter in the following proportions: NaClO3∶H2SO4∶H2O20.8-1.2: 0.1-0.3; the reaction formula is as follows: ；
the chemical raw materials of sodium chlorate and hydrogen peroxide are fed into a mixer from the bottom in proportion, fully mixed in the mixer and fed into a reaction column, and fully reacted with sulfuric acid passing through a metering pump in the reaction column to generate high-purity chlorine dioxide stock solution, and the high-concentration chlorine dioxide solution in the reaction column is fed into a water injector to form a safe-concentration chlorine dioxide solution, is sent out from a chlorine dioxide outlet and is added into water to be treated.
9. The generator device according to claim 8, characterized in that 40% sodium chlorate is used as oxidant, 27% hydrogen peroxide is used as reducer, and the reaction is carried out in 72% sulfuric acid medium, the proportion of raw materials entering is: NaClO3∶H2SO4∶H2O21: 0.2; the reaction formula is as follows: NaClO3+1/2 H2O2+1/2 H2SO4→ClO2+1/2 O2+1/2 Na2SO4+H2O。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021311293A CN1488571A (en) | 2002-10-11 | 2002-10-11 | High-pure chlorinedioxide generator apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA021311293A CN1488571A (en) | 2002-10-11 | 2002-10-11 | High-pure chlorinedioxide generator apparatus |
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| Publication Number | Publication Date |
|---|---|
| CN1488571A true CN1488571A (en) | 2004-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CNA021311293A Pending CN1488571A (en) | 2002-10-11 | 2002-10-11 | High-pure chlorinedioxide generator apparatus |
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| CN (1) | CN1488571A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387511C (en) * | 2005-08-26 | 2008-05-14 | 南京工业大学 | Chlorine dioxide generator |
| CN102958828A (en) * | 2010-07-08 | 2013-03-06 | 阿克佐诺贝尔化学国际公司 | Process for the production of chlorine dioxide |
| CN105947985A (en) * | 2016-05-03 | 2016-09-21 | 广西大学 | Chlorine dioxide preparation method capable of recycling sodium acid sulfate |
| CN107812218A (en) * | 2017-12-11 | 2018-03-20 | 范力仁 | A kind of cabinet type disinfection by chlorine dioxide system |
| US11130677B2 (en) | 2017-03-24 | 2021-09-28 | Ecolab Usa Inc. | Low risk chlorine dioxide onsite generation system |
| US11225421B2 (en) | 2017-08-17 | 2022-01-18 | Ecolab Usa Inc. | Low risk chlorine dioxide onsite generation system |
| CN115092890A (en) * | 2022-07-29 | 2022-09-23 | 哈尔滨工业大学（威海） | Method and device for preparing chlorine dioxide through ultrasonic-assisted catalysis |
| US11535541B2 (en) | 2017-02-27 | 2022-12-27 | Ecolab Usa Inc. | Method for onsite production of chlorine dioxide |
-
2002
- 2002-10-11 CN CNA021311293A patent/CN1488571A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387511C (en) * | 2005-08-26 | 2008-05-14 | 南京工业大学 | Chlorine dioxide generator |
| CN102958828A (en) * | 2010-07-08 | 2013-03-06 | 阿克佐诺贝尔化学国际公司 | Process for the production of chlorine dioxide |
| CN107673310A (en) * | 2010-07-08 | 2018-02-09 | 阿克苏诺贝尔化学品国际有限公司 | The method for producing chlorine dioxide |
| CN105947985A (en) * | 2016-05-03 | 2016-09-21 | 广西大学 | Chlorine dioxide preparation method capable of recycling sodium acid sulfate |
| CN105947985B (en) * | 2016-05-03 | 2018-08-21 | 广西大学 | A kind of chlorine dioxide preparation method of recyclable sodium acid sulfate |
| US11535541B2 (en) | 2017-02-27 | 2022-12-27 | Ecolab Usa Inc. | Method for onsite production of chlorine dioxide |
| US11130677B2 (en) | 2017-03-24 | 2021-09-28 | Ecolab Usa Inc. | Low risk chlorine dioxide onsite generation system |
| US11225421B2 (en) | 2017-08-17 | 2022-01-18 | Ecolab Usa Inc. | Low risk chlorine dioxide onsite generation system |
| CN107812218A (en) * | 2017-12-11 | 2018-03-20 | 范力仁 | A kind of cabinet type disinfection by chlorine dioxide system |
| CN115092890A (en) * | 2022-07-29 | 2022-09-23 | 哈尔滨工业大学（威海） | Method and device for preparing chlorine dioxide through ultrasonic-assisted catalysis |
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