CN216572415U - Chlorine dioxide absorption system - Google Patents
Chlorine dioxide absorption system Download PDFInfo
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- CN216572415U CN216572415U CN202123252537.1U CN202123252537U CN216572415U CN 216572415 U CN216572415 U CN 216572415U CN 202123252537 U CN202123252537 U CN 202123252537U CN 216572415 U CN216572415 U CN 216572415U
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Abstract
The utility model discloses a chlorine dioxide absorption system, which comprises an absorption tower, a circulating pump and a heat exchanger; the lower part of the absorption tower is communicated with an air inlet pipeline, a product outlet at the bottom of the absorption tower is connected with a conveying pump through a pipeline, a liquid outlet at the lower part of the absorption tower is connected with a liquid inlet of a circulating pump through a pipeline, a liquid inlet of the circulating pump is also communicated with a sodium hydroxide liquid supplementing pipe, a liquid outlet of the circulating pump is connected with a liquid inlet of a heat exchanger through a pipeline, a liquid outlet of the heat exchanger is connected with a liquid inlet of the absorption tower through a pipeline, a hydrogen peroxide liquid supplementing pipe is communicated with a pipeline connecting the liquid outlet of the heat exchanger with the liquid inlet of the absorption tower, a circulating water inlet of the heat exchanger is connected with a circulating water inlet pipeline, and a circulating water outlet of the heat exchanger is connected with a circulating water return pipeline; a detection pipeline is communicated between a liquid inlet of the circulating pump and a liquid outlet of the circulating pump, a pH detector and an ORP detector are installed on the detection pipeline, and a sampling pipeline is communicated with a pipeline between the pH detector and the ORP detector.
Description
The technical field is as follows:
the utility model relates to a sodium chlorite production technical field especially relates to a chlorine dioxide absorption system.
Background art:
chlorine dioxide is a gas from yellowish green to orange yellow, is mainly used for bleaching paper pulp, paper, fiber, wheat flour and starch, refining and bleaching grease, beeswax and the like, and disinfecting and sterilizing drinking water, is a safe and low-toxicity green disinfectant internationally acknowledged, but has strong oxidizing property, instability and high-concentration explosiveness, so that the production, packaging and transportation of the chlorine dioxide are greatly limited, and sodium chlorite is immobilized chlorine dioxide with excellent performance, has stability, is also a high-efficiency bleaching agent and an oxidizing agent, and can be used for disinfecting and sterilizing drinking water, environmental sanitation, food preservation and the like; the sodium chlorite product is prepared by absorbing chlorine dioxide gas by using sodium hydroxide solution and hydrogen peroxide, and can overcome the defects of poor stability, inconvenient transportation and storage and the like.
However, in the process of preparing a sodium chlorite product by absorbing chlorine dioxide gas by using a sodium hydroxide solution and hydrogen peroxide, a large amount of heat can be released, so that the temperature in the absorption tower is overhigh, the stability of the hydrogen peroxide is influenced, the reaction is influenced, and the yield of the sodium chlorite is influenced; in the preparation process, in order to ensure that the reaction is continuously carried out, the working personnel is required to frequently sample the sodium hydroxide solution and the hydrogen peroxide and detect the content of the sodium hydroxide solution and the hydrogen peroxide, and whether the system needs to supplement the sodium hydroxide solution and the hydrogen peroxide is judged.
The utility model has the following contents:
an object of the utility model is to provide a chlorine dioxide absorption system has increased the output of sodium chlorite, has reduced staff's sample, detection number of times, has solved operating personnel intensity of labour big, consume time, problem that production efficiency is low.
The utility model discloses implement by following technical scheme: the chlorine dioxide absorption system comprises an absorption tower, a circulating pump and a heat exchanger; the lower part of the absorption tower is communicated with an air inlet pipeline, a product outlet at the bottom of the absorption tower is connected with a conveying pump through a pipeline, a liquid outlet at the lower part of the absorption tower is connected with a liquid inlet of the circulating pump through a pipeline, a liquid inlet of the circulating pump is also communicated with a sodium hydroxide liquid supplementing pipe, a liquid outlet of the circulating pump is connected with a liquid inlet of the heat exchanger through a pipeline, a liquid outlet of the heat exchanger is connected with a liquid inlet at the upper part of the absorption tower through a pipeline, a hydrogen peroxide liquid supplementing pipe is communicated with a pipeline connecting the liquid outlet of the heat exchanger with the liquid inlet of the absorption tower, a circulating water inlet of the heat exchanger is connected with a circulating water inlet pipeline, and a circulating water outlet of the heat exchanger is connected with a circulating water return pipeline; a detection pipeline is communicated between a liquid inlet of the circulating pump and a liquid outlet of the circulating pump, a pH detector and an ORP detector are installed on the detection pipeline, a sampling pipeline is communicated with a pipeline between the pH detector and the ORP detector, and a sampling valve is installed on the sampling pipeline.
Preferably, a groove type liquid distributor is fixed in the absorption tower and is arranged at a position below the liquid inlet of the absorption tower.
Preferably, a wire mesh demister is fixed inside the absorption tower and is arranged above the liquid inlet of the absorption tower.
Preferably, a hump plate is fixed above the air inlet in the absorption tower, and PVC Taylor rosette filler is arranged in the absorption tower between the hump plate and the groove type liquid distributor.
The utility model has the advantages that: the heat exchanger is arranged between the liquid outlet of the circulating pump and the liquid inlet of the absorption tower, circulating water at 5 ℃ is used for exchanging heat with the absorption liquid, the absorption liquid is ensured to be at a lower temperature, the stability of hydrogen peroxide is ensured, the stable and sufficient hydrogen peroxide can avoid the disproportionation reaction of chlorine dioxide in an alkaline aqueous solution, the conversion of chlorine dioxide into sodium chlorite is facilitated, and the yield of sodium chlorite is increased;
the arrangement of the wire mesh demister is beneficial to removing liquid carried in the tail gas, so that the recovery treatment of the chlorine dioxide gas is facilitated, and meanwhile, the waste of the absorption liquid is avoided;
the hump plate is arranged, so that the PVC Taylor rosette filler is effectively supported, the ventilating effect of the hump plate is good, and chlorine dioxide gas can rapidly pass through the hump plate; the chlorine dioxide gas passing through the camel peak plate passes through the PVC Taylor rosette filler from bottom to top; arranging a groove-type liquid distributor in the absorption tower, uniformly spraying absorption liquid on the PVC Taylor rosette filler, enabling the absorption liquid to penetrate through the PVC Taylor rosette filler from top to bottom, and absorbing the reverse chlorine dioxide gas; the PVC Taylor rosette filler is arranged, so that the contact area of chlorine dioxide gas and absorption liquid is effectively increased, and the absorption efficiency of chlorine dioxide is improved;
through setting up detection pipeline and pH detector and ORP detector, can be online real-time detection system in the pH value and the oxidation reduction potential value of solution, need not frequent sample check, regular spot check can, effectively reduce sampling frequency, alleviate operating personnel's intensity of labour, shorten check-out time.
Description of the drawings:
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the structure of an absorption column.
Fig. 2 is a schematic structural diagram of the present invention.
The parts in the drawings are numbered as follows: the device comprises an absorption tower 1, a liquid inlet 1.1, a liquid outlet 1.2, a gas inlet 1.3, a gas outlet 1.4, a product outlet 1.5, a groove type liquid distributor 1.6, a wire mesh demister 1.7, PVC Taylor rosette packing 1.8, a hump plate 1.9, a circulating pump 2, a heat exchanger 3, a delivery pump 4, a sodium hydroxide liquid supplementing pipe 5, a hydrogen peroxide liquid supplementing pipe 6, a circulating water inlet pipeline 7, a circulating water return pipeline 8, a detection pipeline 9, a pH detector 10, an ORP detector 11, a sampling pipeline 12 and a gas inlet pipeline 13.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
As shown in fig. 1 and 2, the chlorine dioxide absorption system comprises an absorption tower 1, a circulating pump 2 and a heat exchanger 3; a liquid inlet 1.1 is arranged at the upper part of the absorption tower 1, a liquid outlet 1.2 and a gas inlet 1.3 are arranged at the lower part of the absorption tower 1, a gas outlet 1.4 is arranged at the top of the absorption tower 1, and a product outlet 1.5 is arranged at the bottom of the absorption tower 1; a groove type liquid distributor 1.6 is fixed in the absorption tower 1, the groove type liquid distributor 1.6 is positioned below the liquid inlet 1.1, and the groove type liquid distributor 1.6 can enable the absorption liquid to be uniformly sprayed on the filler; a wire mesh demister 1.7 is fixed above a liquid inlet 1.1 in the absorption tower 1, and when the tail gas is discharged from an exhaust port 1.4, the wire mesh demister 1.7 can remove liquid carried in the tail gas, so that the recovery treatment of chlorine dioxide gas is facilitated, and the waste of absorption liquid is avoided; a hump plate 1.9 is fixed above an air inlet 1.3 in the absorption tower 1, the hump plate 1.9 has good ventilation effect, which is beneficial to the chlorine dioxide gas to rapidly pass through the hump plate 1.9 to contact with the absorption liquid and improve the absorption efficiency of the chlorine dioxide gas; be equipped with PVC taylor rosette filler 1.8 in the absorption tower 1 between hump board 1.9 and slot type liquid distributor 1.6, PVC taylor rosette filler 1.8 can play the effect that increases gas-liquid area of contact, improves absorption efficiency, and hump board 1.9 still plays the effect that supports PVC taylor rosette filler 1.8.
The lower part of the absorption tower 1 is communicated with an air inlet pipeline 13, and the air inlet pipeline 13 is provided with a valve; a product outlet at the bottom of the absorption tower 1 is connected with a delivery pump 4 through a pipeline, a liquid outlet at the lower part of the absorption tower 1 is connected with a liquid inlet of a circulating pump 2 through a pipeline, a liquid inlet of the circulating pump 2 is also communicated with a sodium hydroxide liquid supplementing pipe 5, a valve is arranged on the sodium hydroxide liquid supplementing pipe 5, a liquid outlet of the circulating pump 2 is connected with a liquid inlet of a heat exchanger 3 through a pipeline, a liquid outlet of the heat exchanger 3 is connected with a liquid inlet at the upper part of the absorption tower 1 through a pipeline, a hydrogen peroxide liquid supplementing pipe 6 is communicated on a pipeline connecting the liquid outlet of the heat exchanger 3 with the liquid inlet at the upper part of the absorption tower 1, and a valve is arranged on the hydrogen peroxide liquid supplementing pipe 6; a circulating water inlet of the heat exchanger 3 is connected with a circulating water inlet pipeline 7, and a circulating water outlet of the heat exchanger 3 is connected with a circulating water return pipeline 8; a detection pipeline 9 is communicated between a liquid inlet and a liquid outlet of the circulating pump 2, a pH detector 10 and an ORP detector 11 are installed on the detection pipeline 9, maintenance valves are installed at the liquid inlet and the liquid outlet of the detection pipeline 9 respectively, a sampling pipeline 12 is communicated on a pipeline between the pH detector 10 and the ORP detector 11, and a sampling valve is installed on the sampling pipeline 12.
The working principle is as follows: injecting a sodium hydroxide solution and water into the bottom of the absorption tower 1, introducing hydrogen peroxide through a hydrogen peroxide solution supplementing pipe 6, starting a circulating pump 2, circulating the absorption liquid through the circulating pump 2, introducing chlorine dioxide gas into the absorption tower 1 through an air inlet pipeline 13 at the lower part of the absorption tower 1, reacting the chlorine dioxide gas with the sodium hydroxide solution and the hydrogen peroxide solution, and continuously participating in circulation of the absorption liquid formed by mixing a sodium chlorite solution generated after reaction with a reaction residual liquid;
a heat exchanger 3 is arranged between a liquid outlet of a circulating pump 2 and a liquid inlet of an absorption tower 1, circulating water at 5 ℃ enters the heat exchanger 3 through a circulating water inlet pipeline 7 and is discharged through a circulating water return pipeline 8, the circulating water exchanges heat with absorption liquid, the bottom of the absorption tower 1 can form a high-concentration sodium chlorite solution after the absorption liquid exchanges heat through multiple cycles, and when the concentration of the sodium chlorite solution is higher, sodium chlorite crystal slurry is extracted and sent to a filtering unit through a conveying pump 4.
In the process that the absorption liquid is circulated through the circulating pump 2, the content of sodium hydroxide solution and hydrogen peroxide is detected in real time through the pH detector 10 and the ORP detector 11, if the pH value is lower than a set value, the content of the sodium hydroxide solution is low, a valve on the sodium hydroxide solution supplementing pipe 5 is opened to supplement the sodium hydroxide solution, similarly, the oxidation-reduction potential value of the solution in the system is detected through the ORP detector 11, if the oxidation-reduction potential value is lower than a set range, the valve on the sodium hydroxide solution supplementing pipe 5 and the valve on the hydrogen peroxide solution supplementing pipe 6 are opened to supplement the sodium hydroxide solution and the hydrogen peroxide solution, the continuous proceeding of the reaction is ensured, and the production efficiency of the system is improved.
Open the sample valve on the sampling pipeline 12, after taking a sample, the PH value and the oxidation reduction potential value of accurate measurement solution go on through the cooperation of two kinds of detection methods of sample detection and pH detector 10, ORP detector 11 detection, can online real-time detection solution condition, need not frequent sample check, regularly check by spot check can, effectively reduce sampling frequency, alleviate operating personnel's intensity of labour, shorten check-out time.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The chlorine dioxide absorption system is characterized by comprising an absorption tower, a circulating pump and a heat exchanger; the lower part of the absorption tower is communicated with an air inlet pipeline, a product outlet at the bottom of the absorption tower is connected with a conveying pump through a pipeline, a liquid outlet at the lower part of the absorption tower is connected with a liquid inlet of the circulating pump through a pipeline, a liquid inlet of the circulating pump is also communicated with a sodium hydroxide liquid supplementing pipe, a liquid outlet of the circulating pump is connected with a liquid inlet of the heat exchanger through a pipeline, a liquid outlet of the heat exchanger is connected with a liquid inlet at the upper part of the absorption tower through a pipeline, a hydrogen peroxide liquid supplementing pipe is communicated with a pipeline connecting the liquid outlet of the heat exchanger with the liquid inlet of the absorption tower, a circulating water inlet of the heat exchanger is connected with a circulating water inlet pipeline, and a circulating water outlet of the heat exchanger is connected with a circulating water return pipeline; a detection pipeline is communicated between a liquid inlet of the circulating pump and a liquid outlet of the circulating pump, a pH detector and an ORP detector are installed on the detection pipeline, a sampling pipeline is communicated with a pipeline between the pH detector and the ORP detector, and a sampling valve is installed on the sampling pipeline.
2. A chlorine dioxide absorption system as claimed in claim 1, wherein a trough-type liquid distributor is fixed in the absorption tower and is disposed at a position below the liquid inlet of the absorption tower.
3. The chlorine dioxide absorption system according to claim 2, wherein a wire mesh demister is fixed inside the absorption tower, and the wire mesh demister is disposed above the liquid inlet of the absorption tower.
4. A chlorine dioxide absorption system as claimed in claim 3, wherein a hump plate is fixed above the air inlet in the absorption tower, and PVC taylor rosette packing is arranged in the absorption tower between the hump plate and the trough liquid distributor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123252537.1U CN216572415U (en) | 2021-12-22 | 2021-12-22 | Chlorine dioxide absorption system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123252537.1U CN216572415U (en) | 2021-12-22 | 2021-12-22 | Chlorine dioxide absorption system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216572415U true CN216572415U (en) | 2022-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123252537.1U Active CN216572415U (en) | 2021-12-22 | 2021-12-22 | Chlorine dioxide absorption system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216572415U (en) |
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2021
- 2021-12-22 CN CN202123252537.1U patent/CN216572415U/en active Active
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