CN114380381A - Harmless treatment method and device for chlorine dioxide generator residual liquid - Google Patents

Harmless treatment method and device for chlorine dioxide generator residual liquid Download PDF

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Publication number
CN114380381A
CN114380381A CN202111238438.XA CN202111238438A CN114380381A CN 114380381 A CN114380381 A CN 114380381A CN 202111238438 A CN202111238438 A CN 202111238438A CN 114380381 A CN114380381 A CN 114380381A
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control valve
value
reaction barrel
caustic soda
residual liquid
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邓宇杰
郑日兴
董野
叶旭阳
庞达
徐柳
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Shenzhen Shenshui Longhua Water Co ltd
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Shenzhen Shenshui Longhua Water Co ltd
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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/12—Halogens or halogen-containing compounds
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/005—Processes using a programmable logic controller [PLC]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/06—Controlling or monitoring parameters in water treatment pH
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00—Controlling or monitoring parameters in water treatment
    • C02F2209/40—Liquid flow rate

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

The invention discloses a method and a device for harmlessly treating residual liquid of a chlorine dioxide generator, comprising the following steps of: conveying residual liquid and NaOH solution of a chlorine dioxide generator into a reaction barrel through pipelines, wherein a residual liquid control valve and a caustic soda solution control valve are respectively arranged on the two pipelines; detecting the PH value in the reaction barrel in real time, and comparing the real-time detected PH value with a preset standard discharge PH range value; when the PH value in the reaction barrel is detected not to be within the standard discharge PH range value, the PLC control system respectively adjusts the flow rate of the caustic soda solution control valve and the flow rate of the residual solution control valve. After the PH value in the reaction barrel is detected in real time and compared with the preset standard discharge PH range value, the PLC control system dynamically adjusts the flow rates of the residual liquid control valve and the caustic soda solution control valve, so that the PH value in the reaction barrel approaches to the preset target PH range value, and the chlorine dioxide residual liquid is harmlessly treated.

Description

Harmless treatment method and device for chlorine dioxide generator residual liquid
Technical Field
The invention relates to the technical field of harmless treatment of acid residual liquid, in particular to a method and a device for harmless treatment of residual liquid of a chlorine dioxide generator.
Background
Chlorine dioxide is widely applied to water plants with the advantages of high efficiency, quick disinfection effect and capability of reducing organic disinfection byproducts, and the ClO is prepared by a hydrogen peroxide reduction method commonly used at present2However, the residual liquid after gas-liquid separation of the chlorine dioxide generator belongs to a strong acid solution, and the direct discharge of the residual liquid can cause great harm to the environment. Therefore, the comprehensive research on the recovery and treatment of the residual liquid is particularly important. The currently adopted techniques are: ferrous reduction, ion exchange and other chemical methods and activated carbon adsorption methods. For in the raffinate
Figure RE-GDA0003525638570000011
And H+The research on the treatment method is less, and the cost of the existing treatment method is high, so that the research on the treatment method for controlling the residual liquid pollution has practical significance.
Accordingly, the prior art is yet to be improved and developed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method and a device for harmless treatment of chlorine dioxide generator raffinate aiming at the defects in the prior art, and realizing rapid, economical and harmless treatment of chlorine dioxide raffinate.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a method and a device for harmless treatment of chlorine dioxide generator raffinate comprise the following steps:
conveying residual liquid and NaOH solution of a chlorine dioxide generator into a reaction barrel through pipelines, wherein a residual liquid control valve and a caustic soda solution control valve are respectively arranged on the two pipelines;
detecting the PH value in the reaction barrel in real time, and comparing the real-time detected PH value with a preset standard discharge PH range value;
when the PH value in the reaction barrel is detected not to be within the standard discharge PH range value, the PLC control system respectively adjusts the flow rate of the caustic soda solution control valve and the flow rate of the residual solution control valve, so that the PH value in the reaction barrel approaches to the preset target PH range value.
Preferably, before the real-time detecting the PH value in the reaction barrel and comparing the real-time detected PH value with the preset standard discharge PH range value, the method further comprises:
the solution in the reaction barrel is stirred uniformly by a stirrer.
Preferably, when it is detected that the PH value in the reaction barrel is not within the standard discharge PH range, the PLC control system respectively adjusts the flow rate of the caustic soda solution control valve and the flow rate of the residual solution control valve so that the PH value in the reaction barrel approaches the preset target PH range, including the following specific steps:
when the PH value in the reaction barrel is detected to be smaller than the minimum value of the standard discharge PH range value, the PLC control system respectively controls the caustic soda solution control valve to increase the flow rate and the residual liquid control valve to decrease the flow rate;
when the PH value in the reaction barrel is detected to be greater than the maximum value of the standard discharge PH range value, the PLC control system respectively controls the caustic soda solution control valve to reduce the flow rate and the residual liquid control valve to increase the flow rate.
Preferably, the standard discharge pH range is 6-9.
Preferably, when the PH value in the reaction barrel is less than 6, the solution in the reaction barrel is too acidic, and the flow rates of the caustic soda solution control valve and the residual solution control valve need to be adjusted, wherein the flow rate calculation formulas of the caustic soda solution control valve and the residual solution control valve are as follows:
Figure RE-GDA0003525638570000031
Figure RE-GDA0003525638570000032
wherein L is the volume of the solution in the reaction barrel,
Figure RE-GDA0003525638570000033
is the concentration of hydrogen ions in the reaction barrel,
Figure RE-GDA0003525638570000034
the concentration of hydrogen ions in the residual liquid is determined,
Figure RE-GDA00035256385700000310
is the hydroxide ion concentration of the instant NaOH solution, V1Is a target value of the flow rate of the residual liquid control valve, V2The flow rate target value of the caustic soda solution control valve is shown, t is the collection time period, and a fixed value of 20S is taken.
Preferably, when the PH value in the reaction barrel is greater than 9, the solution in the reaction barrel is too alkaline, and the flow rates of the caustic soda solution control valve and the residual solution control valve need to be adjusted, wherein the flow rate calculation formulas of the caustic soda solution control valve and the residual solution control valve are as follows:
Figure RE-GDA0003525638570000035
Figure RE-GDA0003525638570000036
wherein L is the volume of the solution in the reaction barrel,
Figure RE-GDA0003525638570000037
is the concentration of hydroxyl ions in the reaction barrel,
Figure RE-GDA0003525638570000038
the concentration of hydroxide ions in the instant NaOH solution,
Figure RE-GDA0003525638570000039
is the hydrogen ion concentration of the immediate raffinate, V1Is a target value of the flow rate of the residual liquid control valve, V2The flow rate target value of the caustic soda solution control valve is shown, t is the collection time period, and a fixed value of 20S is taken.
Preferably, the caustic soda solution control valve and the residual solution control valve are digital metering pumps.
Preferably, when the PH value in the reaction barrel is always within a preset target PH range, the PLC control system controls the electric valve to discharge the solution in the reaction barrel into the sludge concentration tank.
The invention also provides a device for harmlessly treating the residual liquid of the chlorine dioxide generator, which comprises a residual liquid pool and a caustic soda solution pool;
the residual liquid pool and the caustic soda solution pool are connected with the reaction barrel through first pipelines, and digital metering pumps are arranged on the two first pipelines;
a stirrer is arranged in the reaction barrel;
PH meters for measuring PH are arranged in the reaction barrel and the residual liquid pool;
and the digital metering pump, the stirrer and the PH meter are electrically connected with the PLC control system.
Preferably, the bottom of the reaction barrel is communicated with the sludge concentration tank through a second pipeline, and the second pipeline is provided with an electric valve.
Compared with the prior art, the method and the device for harmlessly treating the residual liquid of the chlorine dioxide generator have the following beneficial effects:
whether the solution in the reaction barrel is too acid or too alkali can be immediately obtained by comparing the pH value in the real-time detection reaction barrel with the preset standard discharge pH range value, and the flow rate of the residual liquid control valve and the caustic soda solution control valve is dynamically adjusted by the PLC control system, so that the pH value in the reaction barrel approaches to the preset target pH range value, the residual liquid can be efficiently and quickly treated, and the chlorine dioxide residual liquid can be harmlessly treated.
Drawings
In order to illustrate the solution of the present application more clearly, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings can be obtained by those skilled in the art without inventive effort.
FIG. 1 is a schematic flow chart of a preferred embodiment of the method for harmless treatment of chlorine dioxide generator raffinate of the present invention.
FIG. 2 is a schematic block diagram of a preferred embodiment of the apparatus for harmless treatment of chlorine dioxide generator raffinate of the present invention.
Detailed Description
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "including" and "having," and any variations thereof, in the description and claims of this application and the description of the above figures are intended to cover non-exclusive inclusions. The terms "first," "second," and the like in the description and claims of this application or in the above-described drawings are used for distinguishing between different objects and not for describing a particular order.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
The ClO is prepared by the hydrogen peroxide reduction method which is commonly used at present2However, the residual liquid after gas-liquid separation of the chlorine dioxide generator belongs to a strong acid solution, and the direct discharge of the residual liquid can cause great harm to the environment. By means of H2SO4、H2O2And NaClO3Preparation of ClO2Gas, the chemical reaction formula is as follows:
2NaClO3+2H2SO4+H2O2→2ClO2+2NaHSO4+2H2O
the residual liquid after the reaction belongs to strongly acidic wastewater, and the concentration change is large.
The method for neutralizing the strong-acid residual liquid by using the NaOH solution controls the pH value of the neutralized strong-acid residual liquid to be 6-9, discharges the neutralized strong-acid residual liquid to a sludge concentration tank of a water plant, and carries out subsequent treatment. The chemical reaction formula is as follows:
NaOH+NaHSO4→Na2SO4+H2O
the embodiment of the invention provides a method and a device for harmless treatment of chlorine dioxide generator raffinate, as shown in figure 1, comprising the following steps:
s100, conveying residual liquid and NaOH solution of a chlorine dioxide generator into a reaction barrel through pipelines, wherein a residual liquid control valve and a caustic soda solution control valve are respectively arranged on the two pipelines;
s200, detecting the PH value in the reaction barrel in real time, and comparing the real-time detected PH value with a preset standard discharge PH range value;
s300, when the PH value in the reaction barrel is detected not to be within the standard discharge PH range value, the PLC control system respectively adjusts the flow rate of the caustic soda solution control valve and the flow rate of the residual liquid control valve, so that the PH value in the reaction barrel approaches to a preset target PH range value.
The innovation points of the application are as follows: chlorine dioxide is a pre-oxidant widely applied in a water supply process and has the advantages of high oxidability, thorough oxidation degree and the like; however, a large amount of waste acid is generated in the generation process of the generator, and the treatment method commonly used in the market at present is difficult to accurately regulate and control and has high treatment cost due to large ph floating of the waste acid. Aiming at the difficult problem of chlorine dioxide waste acid treatment in the water supply field, the PH value after reaction is controlled to be 6-9 by adopting the scheme of the application, and the discharge up to the standard is realized. This application mainly controls the velocity of flow of incomplete liquid control valve, caustic soda solution control valve through PLC control system, finally realizes that one-key control raffinate discharges.
In specific implementation, the step S200 of detecting the PH value in the reaction barrel in real time and comparing the detected PH value with a preset standard discharge PH range further includes:
the solution in the reaction barrel is stirred uniformly by a stirrer.
In specific implementation, when the PH value in the reaction barrel is detected not to be within the standard discharge PH range value, the PLC control system respectively adjusts the flow rate of the caustic soda solution control valve and the flow rate of the residual solution control valve, so that the PH value in the reaction barrel approaches the preset target PH range value, and the method comprises the following specific steps:
when the PH value in the reaction barrel is detected to be smaller than the minimum value of the standard discharge PH range value, the PLC control system respectively controls the caustic soda solution control valve to increase the flow rate and the residual liquid control valve to decrease the flow rate;
when the PH value in the reaction barrel is detected to be greater than the maximum value of the standard discharge PH range value, the PLC control system respectively controls the caustic soda solution control valve to reduce the flow rate and the residual liquid control valve to increase the flow rate.
In specific implementation, the standard discharge pH range is 6-9.
When the pH value in the reaction barrel is less than 6, the solution in the reaction barrel is over acidic, and the flow rates of the caustic soda solution control valve and the residual solution control valve need to be adjusted, wherein the flow rate calculation formulas of the caustic soda solution control valve and the residual solution control valve are as follows:
Figure RE-GDA0003525638570000071
Figure RE-GDA0003525638570000072
wherein L is the volume of the solution in the reaction barrel,
Figure RE-GDA0003525638570000073
is the concentration of hydrogen ions in the reaction barrel,
Figure RE-GDA0003525638570000074
the concentration of hydrogen ions in the residual liquid is determined,
Figure RE-GDA0003525638570000075
is the hydroxide ion concentration of the instant NaOH solution, V1Is a target value of the flow rate of the residual liquid control valve, V2The flow rate target value of the caustic soda solution control valve is shown, t is the collection time period, and a fixed value of 20S is taken.
When the PH value in the reaction barrel is more than 9, the solution in the reaction barrel is over-alkaline, the flow rates of the caustic soda solution control valve and the residual liquid control valve need to be adjusted, and the flow rate calculation formulas of the caustic soda solution control valve and the residual liquid control valve are as follows:
Figure RE-GDA0003525638570000081
Figure RE-GDA0003525638570000082
wherein L is the volume of the solution in the reaction barrel,
Figure RE-GDA0003525638570000083
is the concentration of hydroxyl ions in the reaction barrel,
Figure RE-GDA0003525638570000084
the concentration of hydroxide ions in the instant NaOH solution,
Figure RE-GDA0003525638570000085
is the hydrogen ion concentration of the immediate raffinate, V1Is a target value of the flow rate of the residual liquid control valve, V2The flow rate target value of the caustic soda solution control valve is shown, t is the collection time period, and a fixed value of 20S is taken.
And (3) economic analysis: the generation amount of the chlorine dioxide generator residual liquid in the water plant is 0.3m3And d, according to the neutralization ratio of 0.8, the unit price of NaOH is 1780 yuan/t, the external packing treatment cost of the residual liquid is about 2800 yuan/t according to market price inquiry, the risk of dangerous chemicals exists, and the residual liquid is neutralized and treated by utilizing the NaOH, so that the residual liquid has a great cost advantage by comparing the production and operation cost investment.
In specific implementation, the caustic soda solution control valve and the residual solution control valve are digital metering pumps.
When the pH value in the reaction barrel is always within the preset target pH range value, the PLC control system controls the electric valve to discharge the solution in the reaction barrel into the sludge concentration tank.
The invention also provides a device for harmlessly treating the residual liquid of the chlorine dioxide generator, which comprises a residual liquid pool and a caustic soda solution pool;
the residual liquid pool and the caustic soda solution pool are connected with the reaction barrel through first pipelines, and digital metering pumps are arranged on the two first pipelines;
a stirrer is arranged in the reaction barrel;
PH meters for measuring PH are arranged in the reaction barrel and the residual liquid pool;
the digital metering pump, the stirrer and the PH meter are electrically connected with the PLC control system;
the bottom of the reaction barrel is communicated with the sludge concentration tank through a second pipeline, and an electric valve is arranged on the second pipeline.
The water plant has a sludge concentration tank, the daily treatment capacity is 1000m/d, and ClO is treated according to the water plant2The requirement of (2) and a set of residual liquid treatment equipment with the daily treatment capacity of 400L is established. The device has simple maintenance and operation, good treatment effect and low cost, can be used as auxiliary equipment of the chlorine dioxide generator, and has marketization prospect.
In summary, the invention discloses a method and a device for harmless treatment of chlorine dioxide generator raffinate, comprising the following steps: conveying residual liquid and NaOH solution of a chlorine dioxide generator into a reaction barrel through pipelines, wherein a residual liquid control valve and a caustic soda solution control valve are respectively arranged on the two pipelines; detecting the PH value in the reaction barrel in real time, and comparing the real-time detected PH value with a preset standard discharge PH range value; when the PH value in the reaction barrel is detected not to be in the standard discharge PH range value, the PLC control system respectively adjusts the flow rate of the caustic soda solution control valve and the flow rate of the residual solution control valve, so that the PH value in the reaction barrel approaches the preset target PH range value, and whether the solution in the reaction barrel is too acid or too alkali can be immediately obtained by comparing the real-time detection of the PH value in the reaction barrel with the preset standard discharge PH range value.
It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.

Claims (10)

1. A harmless treatment method of chlorine dioxide generator raffinate is characterized by comprising the following steps:
conveying residual liquid and NaOH solution of a chlorine dioxide generator into a reaction barrel through pipelines, wherein a residual liquid control valve and a caustic soda solution control valve are respectively arranged on the two pipelines;
detecting the PH value in the reaction barrel in real time, and comparing the real-time detected PH value with a preset standard discharge PH range value;
when the PH value in the reaction barrel is detected not to be within the standard discharge PH range value, the PLC control system respectively adjusts the flow rate of the caustic soda solution control valve and the flow rate of the residual solution control valve, so that the PH value in the reaction barrel approaches to the preset target PH range value.
2. The method of claim 1, wherein the step of detecting the PH in the reaction tank in real time and comparing the detected PH with a predetermined standard discharge PH range further comprises:
the solution in the reaction barrel is stirred uniformly by a stirrer.
3. The method for harmless treatment of chlorine dioxide generator raffinate of claim 1, wherein when it is detected that the PH in the reaction tank is not within the standard discharge PH range, the PLC control system adjusts the flow rate of the caustic soda solution control valve and the flow rate of the raffinate control valve respectively so that the PH in the reaction tank approaches the preset target PH range, comprising the following specific steps:
when the PH value in the reaction barrel is detected to be smaller than the minimum value of the standard discharge PH range value, the PLC control system respectively controls the caustic soda solution control valve to increase the flow rate and the residual liquid control valve to decrease the flow rate;
when the PH value in the reaction barrel is detected to be greater than the maximum value of the standard discharge PH range value, the PLC control system respectively controls the caustic soda solution control valve to reduce the flow rate and the residual liquid control valve to increase the flow rate.
4. The method of claim 1, wherein the standard discharge PH range is 6 to 9.
5. The method of claim 4, wherein the chlorine dioxide generator raffinate is treated in a harmless manner,
when the pH value in the reaction barrel is less than 6, the solution in the reaction barrel is over acidic, and the flow rates of the caustic soda solution control valve and the residual solution control valve need to be adjusted, wherein the flow rate calculation formulas of the caustic soda solution control valve and the residual solution control valve are as follows:
Figure FDA0003317988420000021
Figure FDA0003317988420000022
wherein L is the volume of the solution in the reaction barrel,
Figure FDA0003317988420000024
is the concentration of hydrogen ions in the reaction barrel,
Figure FDA0003317988420000025
the concentration of hydrogen ions in the residual liquid is determined,
Figure FDA0003317988420000026
is the hydroxide ion concentration of the instant NaOH solution, V1Is a target value of the flow rate of the residual liquid control valve, V2The flow rate target value of the caustic soda solution control valve is shown, t is the collection time period, and a fixed value of 20S is taken.
6. The method of claim 4, wherein when the pH of the reaction tank is greater than 9, the solution in the reaction tank is too alkaline, and the flow rates of the caustic soda solution control valve and the residual solution control valve need to be adjusted, and the flow rates of the caustic soda solution control valve and the residual solution control valve are calculated according to the following formulas:
Figure FDA0003317988420000023
Figure FDA0003317988420000031
wherein L is the volume of the solution in the reaction barrel,
Figure FDA0003317988420000032
is the concentration of hydroxyl ions in the reaction barrel,
Figure FDA0003317988420000033
the concentration of hydroxide ions in the instant NaOH solution,
Figure FDA0003317988420000034
hydrogen ion as an immediate raffinateSub concentration, V1Is a target value of the flow rate of the residual liquid control valve, V2The flow rate target value of the caustic soda solution control valve is shown, t is the collection time period, and a fixed value of 20S is taken.
7. The method of claim 1, wherein the caustic soda solution control valve and the residual liquid control valve are digital metering pumps.
8. The method for harmless treatment of chlorine dioxide generator raffinate of claim 1 wherein the PLC control system controls the electric valve to discharge the solution in the reaction tank into the sludge concentration tank when the PH in the reaction tank is always within the preset target PH range.
9. The utility model provides a harmless treatment device of chlorine dioxide generator raffinate, includes raffinate pond and caustic soda solution pond, its characterized in that still includes:
the residual liquid pool and the caustic soda solution pool are connected with the reaction barrel through first pipelines, and digital metering pumps are arranged on the two first pipelines;
a stirrer is arranged in the reaction barrel;
PH meters for measuring PH are arranged in the reaction barrel and the residual liquid pool;
and the digital metering pump, the stirrer and the PH meter are electrically connected with the PLC control system.
10. The apparatus of claim 9, wherein the bottom of the reaction tank is connected to a sludge concentration tank via a second pipe, and the second pipe is provided with an electric valve.
CN202111238438.XA 2021-10-24 2021-10-24 Harmless treatment method and device for chlorine dioxide generator residual liquid Pending CN114380381A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116859830A (en) * 2023-03-27 2023-10-10 福建天甫电子材料有限公司 Production management control system for electronic grade ammonium fluoride production

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2967712A1 (en) * 2017-05-23 2018-04-11 Bharat Bhushan Treatment of trade effluent from food waste disposal systems
CN209791539U (en) * 2019-03-06 2019-12-17 中国石油化工股份有限公司 Oil field chemical agent detects laboratory waste liquid neutralization treatment device
CN211111406U (en) * 2019-08-02 2020-07-28 中山大学 Harmless treatment device for residual liquid of chlorine dioxide generator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2967712A1 (en) * 2017-05-23 2018-04-11 Bharat Bhushan Treatment of trade effluent from food waste disposal systems
CN209791539U (en) * 2019-03-06 2019-12-17 中国石油化工股份有限公司 Oil field chemical agent detects laboratory waste liquid neutralization treatment device
CN211111406U (en) * 2019-08-02 2020-07-28 中山大学 Harmless treatment device for residual liquid of chlorine dioxide generator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116859830A (en) * 2023-03-27 2023-10-10 福建天甫电子材料有限公司 Production management control system for electronic grade ammonium fluoride production
CN116859830B (en) * 2023-03-27 2024-01-26 福建天甫电子材料有限公司 Production management control system for electronic grade ammonium fluoride production

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