CN111732081A - Device and method for industrially and continuously producing sodium hypochlorite - Google Patents
Device and method for industrially and continuously producing sodium hypochlorite Download PDFInfo
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- CN111732081A CN111732081A CN202010424585.5A CN202010424585A CN111732081A CN 111732081 A CN111732081 A CN 111732081A CN 202010424585 A CN202010424585 A CN 202010424585A CN 111732081 A CN111732081 A CN 111732081A
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Abstract
The invention provides a method for industrially and continuously producing sodium hypochlorite, which comprises the following steps: preparing a sodium hydroxide solution; conveying a sodium hydroxide solution to an absorption tower by using a first conveying pump, wherein the sodium hydroxide solution is sprayed downwards from the top of the absorption tower and is in countercurrent contact reaction with chlorine entering from the bottom of the absorption tower to generate mixed alkali liquor, and the mixed alkali liquor flows into an alkali liquor circulating tank for later use; when the sodium hydroxide solution is completely sprayed, the first conveying pump is closed, the mixed alkali liquor is conveyed to the circulating alkali liquor cooler by the second conveying pump to be cooled by circulating water, and the cooled mixed alkali liquor enters the absorption tower again, is sprayed downwards from the top of the absorption tower and is in countercurrent contact reaction with chlorine; analyzing the concentration of free alkali in the mixed alkali liquor in the alkali liquor circulating tank, closing the second conveying pump when the concentration of the free alkali is 1% -3%, stopping introducing chlorine, and conveying the mixed alkali liquor to the sodium hypochlorite tank by using a third conveying pump; and repeating the steps to realize the industrial continuous production of the sodium hypochlorite.
Description
Technical Field
The invention relates to the technical field of chemical production, in particular to a device and a method for industrially and continuously producing sodium hypochlorite.
Background
The solid sodium hypochlorite is white powder, is extremely unstable in air, can be rapidly decomposed by itself after being heated, and is relatively stable in an alkaline state. The general industrial sodium hypochlorite is colorless or light yellow liquid, has the smell similar to chlorine, has the melting point of-6 ℃ and the boiling point of 102.2 ℃, is easily dissolved in water to generate caustic soda and hypochlorous acid, and the hypochlorous acid is decomposed to generate hydrogen chloride and nascent oxygen, and the nascent oxygen has strong oxidizing capability, so the sodium hypochlorite is a strong oxidizing agent and can be used for purifying water, preparing disinfectants, bleaching paper pulp and the like, and is used for preparing chloramine and the like in the pharmaceutical industry.
In chemical production, sodium hypochlorite is mostly prepared by absorbing chlorine with caustic soda, the strength of absorption reaction and the concentration of generated sodium hypochlorite are determined by the concentration of the caustic soda, when the mass concentration of the caustic soda is increased from 3.58% to 18.61%, the absorption coefficient K value of the caustic soda to the chlorine is decreased from 453 kg/((square meter. h.mol) to 139 kg/((square meter. h.mol), and the absorption strength and the absorption speed are decreased rapidlyThe heat that generates can greatly increased, if the heat can not in time be taken away through the heat exchanger, can take place sodium hypochlorite disproportionation decomposition reaction when the temperature exceedes 60:: 3ClO-→2Cl-+ClO3 -. In order to ensure that sodium hypochlorite with a certain mass concentration is obtained, caustic soda with a specific concentration and temperature is used, so that the absorption effect is ensured, the reaction is not too violent, and the sodium hypochlorite with the specific concentration can be obtained, so that the decomposition caused by overhigh local temperature in the reaction is prevented. Based on the restriction of the above conditions, the continuous production of sodium hypochlorite is difficult to realize in the current industrial preparation.
Disclosure of Invention
In view of the above, the present invention provides a method and an apparatus for industrially and continuously producing sodium hypochlorite.
The invention provides a method for industrially and continuously producing sodium hypochlorite, which comprises the following steps:
step S1, mixing a sodium hydroxide solution with a mass concentration of 32% with desalted water to prepare a sodium hydroxide solution with a mass concentration of 15% -18% and a temperature of 20-40 ℃; the sodium hydroxide solution prepared by the desalted water can avoid the influence of suspended matters and impurities on the solution quality, and the quality of the prepared sodium hypochlorite solution is improved;
step S2, conveying the sodium hydroxide solution to an absorption tower by using a first conveying pump, spraying the sodium hydroxide solution downwards from the top of the absorption tower, and carrying out countercurrent contact reaction with chlorine entering from the bottom of the absorption tower to generate mixed alkali liquor consisting of sodium hydroxide, sodium hypochlorite and sodium chloride, wherein the mixed alkali liquor flows into an alkali liquor circulating tank for later use;
step S3, when the sodium hydroxide solution is completely sprayed, the first delivery pump is closed, the mixed alkali liquor in the alkali liquor circulating tank is delivered to the circulating alkali liquor cooler by the second delivery pump to be cooled by circulating water, the cooled mixed alkali liquor enters the absorption tower again, is sprayed downwards from the top of the absorption tower and is in countercurrent contact reaction with chlorine;
step S4, analyzing the concentration of free alkali in the mixed alkali liquor in the alkali liquor circulating tank every two hours, closing the second conveying pump when the concentration of the free alkali is 1% -3%, stopping introducing chlorine, and conveying the mixed alkali liquor to the sodium hypochlorite tank by using a third conveying pump;
s5, repeating the steps S1-S4, and realizing the industrial continuous production of sodium hypochlorite.
And further, chlorine gas which is not absorbed in the absorption tower enters the tail gas absorption tower to be further absorbed by the sodium hydroxide solution in the tail gas absorption tower, and non-absorbable gas is extracted from the top of the tail gas absorption tower through a fan and is discharged to the atmosphere.
Further, in order to monitor the temperature of the mixed alkali liquor in real time, a first temperature sensor and a second temperature sensor are arranged at an inlet and an outlet of the alkali liquor circulating tank, and when the temperature of the mixed alkali liquor is detected to be too high (for example, more than 60 ℃), the introduction amount of chlorine is reduced or the flow rate of circulating water is increased.
Further, the first delivery pump, the second delivery pump and the third delivery pump are all titanium pumps.
Further, inside top-down of absorption tower sets up distribution disc, first grid tray, second grid tray, the distribution disc is used for distributing chlorine, sodium hydroxide solution, mixed alkali lye, stack the taylor rosette filler of PVC (polyvinyl chloride) material on the first grid tray, stack the taylor rosette filler of CPVC (chlorinated polyvinyl chloride resin) material on the second grid tray, first grid tray and second grid tray are the titanium grid tray, and the titanium grid tray is used with the cooperation of taylor rosette filler and can avoid the incident that collapses because of the temperature difference is too big causes, has guaranteed the safe and stable operation of the process of spraying.
Furthermore, a flushing device is arranged in the chlorine gas header pipe communicated with the inlet of the chlorine gas on the absorption tower, and the flushing device can be opened to flush after the inlet of the chlorine gas is blocked due to salt crystallization, so that the blocking problem is effectively solved, and the quality of sodium hypochlorite is improved. Preferably, the flushing device is a shower head.
The invention provides a device for continuously producing sodium hypochlorite industrially, which comprises an alkali preparation circulating tank, an absorption tower, an alkali liquor circulating tank, a circulating alkali liquor cooler, a tail gas absorption tower and a sodium hypochlorite tank, wherein sodium hydroxide solution is contained in the alkali preparation circulating tank, mixed alkali liquor generated after chlorine and the sodium hydroxide solution react is contained in the alkali liquor circulating tank, the circulating alkali liquor cooler cools the mixed alkali liquor, the tail gas absorption tower contains the sodium hydroxide solution, the sodium hypochlorite tank contains the prepared sodium hypochlorite solution, a chlorine inlet and a first alkali liquor outlet are formed in the bottom of the absorption tower, a chlorine outlet and a first alkali liquor inlet are formed in the top of the absorption tower, a second alkali liquor inlet, a second alkali liquor outlet and a third alkali liquor outlet are formed in the alkali liquor circulating tank, a circulating water inlet, a circulating water outlet, a third alkali liquor inlet and a fourth alkali liquor outlet are formed in the alkali liquor cooler, the tail gas absorption tower is characterized in that a tail gas inlet is formed in the bottom of the tail gas absorption tower, a tail gas outlet is formed in the top of the tail gas absorption tower, a liquid outlet and a fourth alkali liquor outlet of the alkali preparation circulation tank are communicated with a first alkali liquor inlet, the first alkali liquor outlet is communicated with a second alkali liquor inlet, the second alkali liquor outlet is communicated with a third alkali liquor inlet, the third alkali liquor outlet is communicated with a liquid inlet of the sodium hypochlorite tank, and a chlorine outlet is communicated with the tail gas inlet.
Further, inside top-down of absorption tower sets up distribution disc, first grid tray, second grid tray, the distribution disc is used for distributing chlorine, sodium hydroxide solution, mixed alkali lye, stack the taylor rosette filler of PVC (polyvinyl chloride) material on the first grid tray, stack the taylor rosette filler of CPVC (chlorinated polyvinyl chloride resin) material on the second grid tray, first grid tray and second grid tray are the titanium grid tray, and the titanium grid tray is used with the cooperation of taylor rosette filler and can avoid the incident that collapses because of the temperature difference is too big causes, has guaranteed the safe and stable operation of the process of spraying.
Furthermore, the chlorine inlet is communicated with the chlorine main pipe, the flushing device is arranged in the chlorine main pipe close to the chlorine inlet, and the flushing device can be opened to flush after the chlorine inlet is blocked due to salt crystallization, so that the blocking problem is effectively solved, and the quality of sodium hypochlorite is improved. Preferably, the flushing device is a shower head.
Furthermore, a first conveying pump is arranged on a pipeline which is communicated with the first alkali liquor inlet and a liquid outlet of the alkali preparation circulating groove, a second conveying pump is arranged on a pipeline which is communicated with the third alkali liquor inlet and the second alkali liquor outlet, and a third conveying pump is arranged on a pipeline which is communicated with the third alkali liquor outlet and a liquid outlet of the sodium hypochlorite groove.
Furthermore, a first temperature sensor is arranged on a pipeline which is communicated with a second alkali liquor inlet and a first alkali liquor outlet, a second temperature sensor is arranged on a pipeline which is communicated with a third alkali liquor inlet and a second alkali liquor outlet, the first temperature sensor and the second temperature sensor are electrically connected with a remote monitoring device, and the first temperature sensor and the second temperature sensor send detected temperature values to the remote monitoring device.
Further, the third alkali liquor entrance sets up the filter, the filter is preferably the titanium filter, uses the filter can filter the impurity in the alkali liquor, guarantees the quality of sodium hypochlorite solution.
Further, the tail gas outlet is communicated with a fan, and the fan pumps out gas which is not absorbed by the sodium hydroxide solution and discharges the gas to the atmosphere.
Further, the device still includes the alkali lye elevated tank, hold sodium hydroxide solution in the alkali lye elevated tank, the liquid outlet and the first alkali lye entry intercommunication of alkali lye elevated tank set up the valve on the pipeline of the liquid outlet of intercommunication alkali lye elevated tank and first alkali lye entry, when taking place the chlorine leakage accident, open the valve, the sodium hydroxide solution in the alkali lye elevated tank flows into the absorption tower and absorbs chlorine.
Further, the first delivery pump, the second delivery pump and the third delivery pump are all titanium pumps.
The technical scheme provided by the invention has the beneficial effects that:
1. the method provided by the invention cools the mixed alkali liquor which has absorbed chlorine and then sends the cooled mixed alkali liquor into the absorption tower for circular reaction, so that sodium hydroxide can be fully utilized;
2. according to the method, the chlorine gas is absorbed by using the sodium hydroxide solution with the mass concentration of 15-18% and the temperature of 20-40 ℃, so that the disproportionation decomposition reaction of sodium hypochlorite can be effectively avoided;
3. the method provided by the invention analyzes the concentration of free alkali in the mixed alkali liquor every two hours, and ensures that the sodium hypochlorite solution with the purity not less than 11 percent is prepared;
4. according to the device provided by the invention, the titanium grid plate and the Taylor rosette packing are arranged in the absorption tower, and the titanium grid plate and the Taylor rosette packing are matched for use, so that a collapse event caused by overlarge temperature difference can be avoided, and the safe and stable operation in the spraying process is ensured;
5. according to the device provided by the invention, the temperature sensors are arranged at the inlet and the outlet of the alkali liquor circulating tank, the temperature of the mixed alkali liquor is monitored in real time, the flow of circulating water or the introduction amount of chlorine is adjusted according to the temperature change, and the safety and controllability of the production process are ensured.
Drawings
FIG. 1 is a schematic structural diagram of an industrial continuous sodium hypochlorite production device of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present invention provides an apparatus for industrially and continuously producing sodium hypochlorite, comprising: an alkali preparation circulating tank 1, an absorption tower 2, an alkali liquor circulating tank 3, a circulating alkali liquor cooler 4, a tail gas absorption tower 5, a sodium hypochlorite tank 6 and an alkali liquor head tank 7.
The alkali preparation circulating tank 1 is used for preparing a sodium hydroxide solution and holding the sodium hydroxide solution with the mass concentration of 15-18% and the temperature of 20-40 ℃.
Chlorine inlet 21 and first alkali lye export 22 are seted up to the bottom of absorption tower 2, chlorine export 23 and first alkali lye entry 24 are seted up at the top of absorption tower 2, the inside top-down of absorption tower 2 sets up distribution disc 25, first grid tray 26, second grid tray 27, distribution disc 25 is used for distributing chlorine, sodium hydroxide solution, mixed alkali lye, the taylor rosette filler of PVC (polyvinyl chloride) material is stacked on first grid tray 26, the taylor rosette filler of CPVC (chlorinated polyvinyl chloride resin) material is stacked on second grid tray 27, first grid tray 26 and second grid tray 27 are the titanium grid tray, the event of collapsing because of the excessive temperature difference can be avoided in titanium grid tray and taylor rosette filler cooperation use, the safe and stable operation of spraying process has been guaranteed.
Chlorine entry 21 intercommunication chlorine house steward 8 sets up washing unit (not shown in the figure) in the chlorine house steward 8 that is close to chlorine entry 21, can open washing unit and wash after chlorine entry 21 blocks up because of the salt crystallization, effectively solves the jam problem, improves the quality of sodium hypochlorite, preferably, washing unit chooses for use the shower head.
The first alkali liquor inlet 24 is communicated with a liquid outlet of the alkali preparation circulating tank 1, and a first conveying pump 11 is arranged on a pipeline which is communicated with the first alkali liquor inlet 24 and the liquid outlet of the alkali preparation circulating tank 1.
A second alkali liquor inlet 31, a second alkali liquor outlet 32 and a third alkali liquor outlet 33 are formed in the alkali liquor circulating groove 3, the second alkali liquor inlet 31 is communicated with the first alkali liquor outlet 22, and a first temperature sensor 34 is arranged on a pipeline communicating the second alkali liquor inlet 31 with the first alkali liquor outlet 22.
Set up circulating water entry 41 on the circulating alkali lye cooler 4, circulating water export 42, third alkali lye entry 43 and fourth alkali lye export 44, cooling tube 45 is laid to circulating alkali lye cooler 4's inside, third alkali lye entry 43 and second alkali lye export 32 intercommunication, fourth alkali lye export 44 and first alkali lye entry 24 intercommunication, third alkali lye entry 43 department sets up filter 46, filter 46 is the titanium material filter, use the impurity that filter 46 can filter in the alkali lye, guarantee the quality of sodium hypochlorite solution.
And a second temperature sensor 35 and a second delivery pump 36 are arranged on a pipeline for communicating the third alkali liquor inlet 43 with the second alkali liquor outlet 32, the second temperature sensor 35 and the first temperature sensor 34 are both electrically connected with a remote monitoring device, and the second temperature sensor 35 and the first temperature sensor 34 send detected temperature values to the remote monitoring device.
The sodium hypochlorite groove 6 is used for containing the prepared sodium hypochlorite solution, a liquid inlet of the sodium hypochlorite groove 6 is communicated with the third alkali liquor outlet 33, and a pipeline for communicating the third alkali liquor outlet 33 with the liquid outlet of the sodium hypochlorite groove 6 is provided with a third delivery pump 61.
The bottom of alkali liquor elevated tank 7 sets up the top height that highly is higher than absorption tower 2, holds sodium hydroxide solution in it, and the liquid outlet and the first alkali lye entry 24 intercommunication of alkali liquor elevated tank 7 set up valve 71 on the pipeline of the liquid outlet of intercommunication alkali liquor elevated tank 7 and first alkali lye entry 24, when taking place the chlorine leakage accident, open valve 71, the sodium hydroxide solution in the alkali liquor elevated tank 7 flows into absorption tower 2 and absorbs chlorine.
In this embodiment, the first transfer pump 11, the second transfer pump 36, and the third transfer pump 61 are all titanium pumps.
The working process of the device is as follows: starting a first conveying pump 11, conveying the sodium hydroxide solution in the alkali preparation circulating tank 1 to a first alkali liquor inlet 24, enabling the sodium hydroxide solution to enter an absorption tower 2 from the first alkali liquor inlet 24, spraying the sodium hydroxide solution from top to bottom in the absorption tower 2, and carrying out countercurrent contact reaction with chlorine (the chlorine is derived from tail chlorine generated in the chemical production process) entering from a chlorine inlet 21 to generate mixed alkali liquor consisting of sodium hydroxide, sodium hypochlorite and sodium chloride, wherein the mixed alkali liquor flows into an alkali liquor circulating tank 3; after the sodium hydroxide solution in the alkali preparation circulation tank 1 is completely sprayed, the first conveying pump 11 is closed, the second conveying pump 36 is started, the mixed alkali liquor in the alkali liquor circulation tank 3 is conveyed to the third alkali liquor inlet 43 through the second alkali liquor outlet 32, the mixed alkali liquor enters the cooling pipe 45 from the third alkali liquor inlet 43, the circulating water entering the circulating alkali liquor cooler 4 from the circulating water inlet 41 cools the mixed alkali liquor in the cooling pipe 45, the circulating water flows out from the circulating water outlet 42, the mixed alkali liquor flowing out from the cooling pipe 45 flows to the first alkali liquor inlet 24 along the fourth alkali liquor outlet 44, then enters the absorption tower 2 again for spraying, absorbs chlorine, detects and analyzes the concentration of free alkali in the mixed alkali liquor in the alkali liquor circulating tank 3, when the concentration of the free alkali is 1% -3%, closing the second conveying pump 36, stopping introducing the chlorine, and then starting the third conveying pump 61 to convey the mixed alkali liquor to the sodium hypochlorite tank 6; after the preparation process is finished, preparing the sodium hydroxide solution again, and repeating the working process.
Chlorine gas which is not absorbed in the absorption tower 2 enters the tail gas absorption tower 5 from the chlorine gas outlet 23 and the tail gas inlet 51, is further absorbed by the sodium hydroxide solution in the tail gas absorption tower 5, and gas which is not absorbed by the sodium hydroxide solution is extracted from the tail gas outlet 52 through the fan 53 and is discharged to the atmosphere.
The first temperature sensor 34 and the second temperature sensor 35 monitor the temperature of the mixed alkali liquor in real time, and when the temperature of the mixed alkali liquor is too high, the chlorine gas introduction amount is appropriately reduced or the flow of circulating water is increased.
In this example, the determination process of the concentration of free alkali in the mixed alkali solution is as follows: taking the mixed alkali liquor in the alkali liquor circulating tank 3 by using a sampling kettle, and taking about 50ml of pure water in a cleaned conical flask; taking 2ml of mixed alkali liquor by using a pipette, firstly dropping 30% hydrogen peroxide solution until no large bubble is generated, then dropping 3-5 drops of phenolphthalein, then titrating by using 1mol/L hydrochloric acid solution, recording the volume of the used hydrochloric acid when the solution is just changed from pink to colorless, and then calculating the concentration of free alkali, wherein the calculation formula is as follows: x% ═ V × 1.67, where V is the volume of hydrochloric acid used and X% indicates the concentration of the free base.
The concentration of free base is analyzed every two hours for normal production and every half hour when the concentration of free base is below 3%.
The embodiment of the invention also provides a method for industrially and continuously producing sodium hypochlorite, which comprises the following steps:
step S1, mixing a sodium hydroxide solution with a mass concentration of 32% with desalted water to prepare a sodium hydroxide solution with a mass concentration of 15% -18% and a temperature of 20-40 ℃; the sodium hydroxide solution prepared by the desalted water can avoid the influence of suspended matters and impurities on the solution quality, and the quality of the prepared sodium hypochlorite solution is improved;
step S2, conveying the sodium hydroxide solution to the absorption tower 2 by using the first conveying pump 11, spraying the sodium hydroxide solution downwards from the top of the absorption tower 2, and carrying out countercurrent contact reaction with chlorine entering from the bottom of the absorption tower 2 to generate mixed alkali liquor consisting of sodium hydroxide, sodium hypochlorite and sodium chloride, wherein the mixed alkali liquor flows into the alkali liquor circulating tank 3 for later use;
step S3, when the sodium hydroxide solution is completely sprayed, the first delivery pump 11 is closed, the mixed alkali liquor in the alkali liquor circulating tank 3 is delivered to the circulating alkali liquor cooler 4 by the second delivery pump 36 to be cooled by circulating water, the cooled mixed alkali liquor enters the absorption tower 2 again, is sprayed downwards from the top of the absorption tower 2 and is in countercurrent contact reaction with chlorine;
step S4, analyzing the concentration of free alkali in the mixed alkali liquor in the alkali liquor circulating tank 3 every two hours, closing the second conveying pump 36 when the concentration of the free alkali is 1% -3%, stopping introducing chlorine, and conveying the mixed alkali liquor to the sodium hypochlorite tank 6 by using the third conveying pump 61;
and S5, repeating the steps S1-S4, and realizing the industrial continuous production of sodium hypochlorite.
Chlorine gas which is not absorbed in the absorption tower 2 enters the tail gas absorption tower 5 and is further absorbed by the sodium hydroxide solution in the tail gas absorption tower 5, and gas which is not absorbed by the sodium hydroxide solution is extracted from the top of the tail gas absorption tower 5 through a fan 53 and is discharged to the atmosphere.
In order to monitor the temperature of the mixed alkali liquor in real time, a first temperature sensor 34 and a second temperature sensor 35 are arranged at the inlet and the outlet of the alkali liquor circulating tank 3, and when the temperature of the mixed alkali liquor is detected to be too high (for example, more than 60 ℃), the introduction amount of chlorine is reduced or the flow rate of circulating water is increased.
In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The features of the embodiments and embodiments described herein above may be combined with each other without conflict.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. The method for industrially and continuously producing the sodium hypochlorite is characterized by comprising the following steps of:
s1, preparing a sodium hydroxide solution;
s2, conveying a sodium hydroxide solution to an absorption tower by using a first conveying pump, wherein the sodium hydroxide solution is sprayed downwards from the top of the absorption tower and is in countercurrent contact reaction with chlorine entering from the bottom of the absorption tower to generate a mixed alkali liquor, and the mixed alkali liquor flows into an alkali liquor circulating tank for later use;
s3, when the sodium hydroxide solution is completely sprayed, the first delivery pump is closed, the mixed alkali liquor in the alkali liquor circulating tank is delivered to the circulating alkali liquor cooler by the second delivery pump to be cooled by circulating water, the cooled mixed alkali liquor enters the absorption tower again, is sprayed downwards from the top of the absorption tower and is in countercurrent contact reaction with chlorine;
s4, analyzing the concentration of free alkali in the mixed alkali liquor in the alkali liquor circulating tank, closing the second conveying pump when the concentration of the free alkali is 1% -3%, stopping introducing chlorine, and conveying the mixed alkali liquor to the sodium hypochlorite tank by using a third conveying pump;
s5, repeating the steps S1-S4, and realizing the industrial continuous production of sodium hypochlorite.
2. The method for continuously producing sodium hypochlorite industrially according to claim 1, wherein in step S1, a sodium hydroxide solution with a mass concentration of 32% is mixed with desalted water to prepare a sodium hydroxide solution with a mass concentration of 15-18% and a temperature of 20-40 ℃.
3. The method for the industrial continuous production of sodium hypochlorite according to claim 1, wherein a first temperature sensor and a second temperature sensor are arranged at the inlet and the outlet of the lye circulation tank, and the first temperature sensor and the second temperature sensor monitor the temperature of the mixed lye in real time.
4. The method for continuously producing sodium hypochlorite industrially according to claim 1, wherein the concentration of the free base is analyzed every two hours in step S4, and when the concentration of the free base is less than 3%, the concentration of the free base is analyzed every half hour.
5. The method for the industrial continuous production of sodium hypochlorite according to claim 1, wherein a distribution tray, a first grid plate and a second grid plate are arranged in the absorption tower from top to bottom, the distribution tray is used for distributing chlorine, sodium hydroxide solution and mixed alkali solution, and Taylor rosette packing is stacked on the first grid plate and the second grid plate.
6. The device for continuously producing sodium hypochlorite in an industrialized manner is characterized by comprising an alkali preparation circulating tank, an absorption tower, an alkali liquor circulating tank, a circulating alkali liquor cooler, a tail gas absorption tower and a sodium hypochlorite tank, wherein a sodium hydroxide solution is contained in the alkali preparation circulating tank, a mixed alkali liquor generated after chlorine and the sodium hydroxide solution react is contained in the alkali liquor circulating tank, the mixed alkali liquor is cooled by the circulating alkali liquor cooler, the sodium hydroxide solution is contained in the tail gas absorption tower, the prepared sodium hypochlorite solution is contained in the sodium hypochlorite tank, a chlorine inlet and a first alkali liquor outlet are formed in the bottom of the absorption tower, a chlorine outlet and a first alkali liquor inlet are formed in the top of the absorption tower, a second alkali liquor inlet, a second alkali liquor outlet and a third alkali liquor outlet are formed in the alkali liquor circulating tank, a circulating water inlet, a circulating water outlet and a circulating water tank are formed in the, The tail gas absorption tower comprises a third alkali liquor inlet and a fourth alkali liquor outlet, wherein the bottom of the tail gas absorption tower is provided with a tail gas inlet, the top of the tail gas absorption tower is provided with a tail gas outlet, a liquid outlet and a fourth alkali liquor outlet of the alkali circulation tank are communicated with a first alkali liquor inlet, the first alkali liquor outlet is communicated with a second alkali liquor inlet, the second alkali liquor outlet is communicated with a third alkali liquor inlet, the third alkali liquor outlet is communicated with a liquid inlet of a sodium hypochlorite tank, and a chlorine outlet is communicated with the tail gas inlet.
7. The apparatus for the industrial continuous production of sodium hypochlorite according to claim 6, wherein the chlorine inlet is communicated with a chlorine manifold, and a flushing device is arranged in the chlorine manifold close to the chlorine inlet.
8. The apparatus for the industrial continuous production of sodium hypochlorite according to claim 6, wherein the absorption tower is internally provided with a distribution disc, a first grid plate and a second grid plate from top to bottom, the distribution disc is used for distributing chlorine, sodium hydroxide solution and mixed alkali solution, and Taylor rosette packing is stacked on the first grid plate and the second grid plate.
9. The device for the industrial continuous production of sodium hypochlorite according to claim 6, wherein the tail gas outlet is communicated with a fan, and the fan pumps out the gas which is not absorbed by the sodium hydroxide solution and discharges the gas to the atmosphere.
10. The device for the industrial continuous production of sodium hypochlorite according to claim 6, further comprising an alkaline solution head tank, wherein the alkaline solution head tank is filled with sodium hydroxide solution, a liquid outlet of the alkaline solution head tank is communicated with the first alkaline solution inlet, and a valve is arranged on a pipeline communicating the liquid outlet of the alkaline solution head tank with the first alkaline solution inlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010424585.5A CN111732081B (en) | 2020-05-19 | 2020-05-19 | Device and method for industrially and continuously producing sodium hypochlorite |
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| CN202010424585.5A CN111732081B (en) | 2020-05-19 | 2020-05-19 | Device and method for industrially and continuously producing sodium hypochlorite |
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| CN111732081A true CN111732081A (en) | 2020-10-02 |
| CN111732081B CN111732081B (en) | 2023-07-14 |
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| CN202010424585.5A Active CN111732081B (en) | 2020-05-19 | 2020-05-19 | Device and method for industrially and continuously producing sodium hypochlorite |
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| CN117742278A (en) * | 2024-02-07 | 2024-03-22 | 四川飞洁科技发展有限公司 | Intelligent monitoring and management method and system for sodium hypochlorite production process |
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| CN111732081B (en) | 2023-07-14 |
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