Generation method of composite chlorine dioxide for disinfecting medical sewage

Abstract

The invention discloses a generation method of medical sewage disinfection composite chlorine dioxide, and relates to the technical field of medical sewage treatment, and the generation method comprises the following steps: S1, preparing raw materials required by preparation according to formula requirements of an active chlorine water treatment agent and an activating agent, weighing the dosage of the raw materials according to the raw material proportion required by the formula, and carrying out batching; s2, putting the prepared raw materials into a reaction container to respectively prepare an active chlorine water treatment agent and an activating agent; and S3, quantitatively adding the active chlorine water treatment agent and the activating agent into specific equipment, reacting to generate an acidic solution of chlorine dioxide and hypochlorous acid, and adding the acidic solution into water to be treated to complete disinfection. According to the generation method of the composite chlorine dioxide for disinfecting the medical sewage, an active chlorine water treatment agent and an activating agent are quantitatively added into specific equipment, an acid solution of chlorine dioxide and hypochlorous acid is generated through reaction, and the acid solution is added into water to be treated to complete disinfection.

Description

Technical Field

[0001] The present invention relates to the technical field of medical sewage treatment, and particularly to a method for generating composite chlorine dioxide for disinfecting medical sewage. Background Art

[0002] Medical sewage refers to the sewage generated by medical institutions (such as hospitals, clinics, laboratories, etc.) during activities such as diagnosis, treatment, prevention, and health care. This kind of sewage usually contains various pathogens (such as bacteria, viruses, parasites, etc.), toxic and harmful substances, as well as drug residues, etc. If it is directly discharged into the environment without proper treatment, it may pollute water bodies, soil, and ecosystems, thereby threatening human health. Therefore, medical sewage must be treated to meet national standards before it can be discharged.

[0003] Disinfection is one of the key links in the medical sewage treatment process. In practical applications, the selection of medical sewage disinfection methods should be comprehensively considered according to factors such as the nature of the sewage, treatment scale, treatment cost, and local environmental protection regulations. At the same time, to ensure the disinfection effect, the disinfection facilities also need to be maintained and monitored regularly. Currently, common medical sewage disinfection methods include chlorination disinfection, ozone disinfection, ultraviolet disinfection, heat disinfection, etc. Other disinfection methods, such as heavy metal ion disinfection, ionizing radiation disinfection, etc., are only applied in certain specific situations and are not the mainstream medical sewage disinfection methods. However, the existing common disinfection methods still have the following deficiencies:

[0004] Chlorination disinfection: Using chlorine-containing disinfectants such as chlorine, sodium hypochlorite, chlorine dioxide, etc. to disinfect medical sewage; it has advantages such as good bactericidal effect and low cost, but the raw materials or the solutions prepared from the raw materials are too unstable. This instability will affect the actual use and result in unstable use results.

[0005] Ozone disinfection: Utilizing the strong oxidizing property of ozone to kill pathogens in medical sewage; it has advantages such as high efficiency, rapidity, and no residue, but requires special ozone generation equipment and has a relatively high operating cost.

[0006] Ultraviolet disinfection: Destroying the DNA or RNA structure of pathogens in medical sewage through ultraviolet irradiation to achieve the purpose of disinfection; it has advantages such as simple operation and no chemical residue, but has high requirements for water quality and relatively high equipment maintenance cost.

[0007] Heat disinfection: Heating medical sewage to a certain temperature to kill the pathogens in it; it has advantages such as reliable bactericidal effect and no chemical residue, but has high energy consumption and is not suitable for large-scale sewage treatment.

[0008] Therefore, it is urgent to improve these deficiencies. The present invention is to research and improve the existing technologies and deficiencies, and provides a method for generating composite chlorine dioxide for disinfecting medical sewage. Summary of the Invention

[0009] The purpose of the present invention is to provide a method for generating composite chlorine dioxide for medical sewage disinfection, so as to solve the problems raised in the above-mentioned background technology.

[0010] To achieve the above purpose, the present invention provides the following technical solutions: A method for generating composite chlorine dioxide for medical sewage disinfection, comprising the following steps:

[0011] S1. According to the formulation requirements of the active chlorine water treatment agent and the activator, select the types and specifications of raw materials, prepare all the raw materials required for preparation, and weigh the dosages of each raw material according to the raw material ratio required by the formulation for batching;

[0012] S2. Put the prepared raw materials into a reaction vessel to separately prepare the active chlorine water treatment agent and the activator;

[0013] S3. Quantitatively add the active chlorine water treatment agent and the activator to a specific device, generate an acidic solution of chlorine dioxide and hypochlorous acid through reaction, and add it to the water to be treated to complete disinfection; the following two chemical reactions exist in this step:

[0014] Ⅰ. The hypochlorite ion in the active chlorine water treatment agent combines with the hydrogen ion ionized from the acid in the activator to form hypochlorous acid, and the reaction formula is as follows:

[0015] clo - +H + →Hclo;

[0016] Ⅱ. The chlorite ion and hypochlorite ion in the active chlorine water treatment agent react with the hydrogen ion ionized from the activator to form chlorine dioxide, and the reaction formula is as follows:

[0017] 2clo 2 - +clo - +2H + →2clo 2 +cl - +H 2 o.

[0018] Furthermore, the active chlorine water treatment agent is prepared by mixing and reacting the mother liquor and the synergist in a ratio of 100:6, and the available chlorine content of the active chlorine water treatment agent is ≥8%.

[0019] Furthermore, the mother liquor is a sodium hypochlorite solution, and the available chlorine content ranges from 4.5 to 5%.

[0020] Furthermore, the mass percentage of clo 2 in the synergist is ≤10%.

[0021] Furthermore, the activator is prepared by mixing pure water, citric acid monohydrate, and sodium sulfate in a ratio of 40:1:1, and the activator is an acidic aqueous solution with an active ingredient ratio of 2.5%.

[0022] Furthermore, the citric acid monohydrate complies with the GB / T 9855-2008 standard; GB / T 9855-2008 is a national standard issued by the Standardization Administration of China, with the full name of "Food Additive Citric Acid Monohydrate", which provides clear technical basis and inspection methods for the quality and safety of citric acid monohydrate.

[0023] Furthermore, the sodium sulfate complies with the GB / T 6009-2003 standard; GB / T 6009-2003 is a national standard issued by the Standardization Administration of China, with the full name of "Industrial Anhydrous Sodium Sulfate", which stipulates the quality and technical requirements of anhydrous sodium sulfate.

[0024] The present invention provides a method for generating composite chlorine dioxide for medical sewage disinfection. By quantitatively adding an active chlorine treatment agent and an activator to a specific device, an acidic solution of chlorine dioxide and hypochlorous acid is generated through reaction and added to the water to be treated to complete disinfection and killing. It has the following beneficial effects:

[0025] 1. The raw materials used in the present invention are all non-chemical dangerous goods, making the product have no relevant safety hazards caused by chemical dangerous goods during on-site actual use and warehousing. It has high safety. And because the raw materials of the product are all common non-chemical dangerous chemical raw materials in the market, the production cost of the target product is low, the cost performance is high, and there are no restrictions during transportation. At the same time, the raw materials and the product itself of this product have good stability, and the stable period can reach more than one year under normal storage, transportation and use conditions.

[0026] 2. The present invention has good bactericidal effect. The actual bactericidal components are chlorine dioxide and hypochlorous acid. In actual use, the two components have strong complementarity and are not likely to cause bacteria to develop drug resistance.

[0027] 3. The present invention is environmentally friendly. Based on the properties of the product and its raw materials, the product is basically non-volatile during actual use, storage and transportation. At the same time, based on the good bactericidal performance of the product and its target product, a low dosage can achieve a good bactericidal effect during actual use, avoiding secondary pollution to the environment. Description of the Drawings

[0028] Figure 1 It is a schematic flow chart of the steps of a method for generating composite chlorine dioxide for medical sewage disinfection according to the present invention. Detailed Embodiments

[0029] The following further describes the embodiments of the present invention in detail in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0030] As Figure 1 shown, a method for generating composite chlorine dioxide for medical sewage disinfection includes the following steps:

[0031] S1. According to the formulation requirements of the active chlorine water treatment agent and the activator, select the raw material types and specifications, prepare all the raw materials required for preparation, and weigh the dosages of each raw material according to the raw material ratio required by the formulation for batching.

[0032] S2. Put the prepared raw materials into the reaction vessel to separately prepare the active chlorine water treatment agent and the activator.

[0033] In this embodiment, the active chlorine water treatment agent is prepared by mixing and reacting the mother liquor and the synergist in a ratio of 100:6. Among them, the mother liquor is a sodium hypochlorite solution, and the available chlorine content ranges from 4.5% to 5%; the mass percentage of the synergist clo 2 ≤10%.

[0034] As the reaction between the sodium hypochlorite solution and the synergist proceeds, the available chlorine content in the solvent increases from 5% to 8%, and the available chlorine content of the finally obtained active chlorine water treatment agent ≥8%.

[0035] The specific preparation process of the active chlorine water treatment agent is as follows:

[0036] A. Slowly pour the measured mother liquor into the reaction vessel, and at the same time start the stirring device.

[0037] B. During the stirring process, slowly add the synergist, pay attention to controlling the addition speed to avoid violent reactions caused by too high local concentration.

[0038] C. Continue to stir for a period of time to make the mother liquor and the synergist react fully to form the active chlorine water treatment agent.

[0039] D. After the preparation is completed, take a sample to detect the available chlorine content of the prepared active chlorine water treatment agent to ensure that it meets the usage requirements. If adjustment is needed, the dosages of the mother liquor or the synergist can be appropriately increased or decreased according to the detection results, and the mixing reaction can be carried out again.

[0040] In this embodiment, the activator is prepared by mixing and reacting pure water, citric acid monohydrate and sodium sulfate in a ratio of 40:1:1, and the activator is an acidic aqueous solution with an effective component ratio of 2.5%;

[0041] Citric acid monohydrate complies with the standard of GB / T 9855-2008; GB / T 9855-2008 is a national standard issued by the Standardization Administration of China, with the full name of "Food Additive - Citric Acid Monohydrate". It provides clear technical basis and inspection methods for the quality and safety of citric acid monohydrate. This standard details various indicators that citric acid monohydrate should meet as a food additive, including but not limited to appearance, content, sulfate, ash, iron content, heavy metal content, arsenic content, chloride content, water-insoluble substances, pH value, light transmittance or turbidity, etc., aiming to ensure the quality and safety of citric acid monohydrate to meet its application requirements in the food industry. In addition, it also stipulates the test methods, inspection rules, as well as requirements for marking, packaging, transportation and storage of citric acid monohydrate, which helps to standardize the production, inspection and use processes of citric acid monohydrate.

[0042] Sodium sulfate complies with the standard of GB / T 6009-2003; GB / T 6009-2003 is a national standard issued by the Standardization Administration of China, with the full name of "Industrial Anhydrous Sodium Sulfate". It stipulates the quality and technical requirements of anhydrous sodium sulfate. This standard details various indicators used to evaluate anhydrous sodium sulfate, including but not limited to appearance, whiteness, sodium sulfate content, water-insoluble substances, iron content, water content, chloride content, heavy metal content, etc. In addition, it also stipulates the corresponding test methods for detecting whether these technical indicators meet the standard requirements.

[0043] The specific preparation process of the activator is as follows:

[0044] A. Pour the weighed pure water into the mixing container. While stirring slowly, add citric acid monohydrate and sodium sulfate in sequence. Pay attention to the adding speed to avoid local high concentration resulting in caking or uneven reaction.

[0045] B. Use the stirring device to fully stir the mixed solution until all solid raw materials are completely dissolved, the solution is uniformly transparent, without impurities and precipitation.

[0046] C. After preparation, take samples to detect the prepared activator to ensure that the activator meets the requirements, that is, an acidic aqueous solution with the proportion of active ingredients being 2.5%.

[0047] S3. Quantitatively add the active chlorine water treatment agent and the activator into a specific device. Through reaction, an acidic solution of chlorine dioxide and hypochlorous acid is generated and added to the water to be treated to complete disinfection. There are the following two chemical reactions in this step:

[0048] Ⅰ. The hypochlorite in the active chlorine water treatment agent combines with the hydrogen ions ionized from the acid in the activator to form hypochlorous acid. The reaction formula is as follows:

[0049] clo - +H+ →HClO;

[0050] II. The chlorite ion and hypochlorite in the active chlorine water treatment agent react with the hydrogen ions ionized from the activator to generate chlorine dioxide. The reaction formula is as follows:

[0051] 2ClO 2 - + ClO - + 2H + → 2ClO 2 + Cl - + H 2 O.

[0052] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better explain the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for a particular purpose.

Claims

1. A method for generating composite chlorine dioxide for disinfecting medical wastewater, characterized in that: The following steps are involved: S1. According to the formula requirements of the active chlorine water treatment agent and the activator, prepare the raw materials required for preparation, and weigh the amount of each raw material according to the raw material ratio required by the formula, and mix the ingredients; S2, putting the prepared raw materials into a reaction container to prepare an active chlorine water treatment agent and an activator respectively; S3, adding active chlorine water treatment agent and activator to a specific device in a quantitative manner, generating an acidic solution of chlorine dioxide and hypochlorous acid through reaction, and adding it to the water to be treated to complete the disinfection; this step involves the following two chemical reactions: Ⅰ. The hypochlorite in the active chlorine water treatment agent combines with the hydrogen ions ionized from the acid in the activator to generate hypochlorous acid. The reaction formula is as follows: clo - +H + →Hclo; Ⅱ. The chlorite ions and hypochlorite ions in the active chlorine water treatment agent react with the hydrogen ions ionized from the activator to generate chlorine dioxide. The reaction formula is as follows:

2. A method for generating composite chlorine dioxide for disinfecting medical wastewater according to claim 1, characterized in that: The active chlorine water treatment agent is prepared by mixing a mother solution and a synergist in a ratio of 100:6, and the effective chlorine content of the active chlorine water treatment agent is ≥8%.

3. A method for generating composite chlorine dioxide for disinfecting medical wastewater according to claim 2, characterized in that: The mother liquor is a sodium hypochlorite solution, and the effective chlorine content ranges from 4.5 to 5%.

4. A method for generating composite chlorine dioxide for disinfecting medical wastewater according to claim 2, characterized in that: The clo2 mass percentage of the synergist is ≤10%.

5. The method for generating composite chlorine dioxide for disinfecting medical wastewater according to claim 1, characterized in that: The activator is prepared by mixing purified water, citric acid monohydrate and sodium sulfate in a ratio of 40:1:1, and the activator is an acidic aqueous solution with an effective component accounting for 2.5%.

6. A method for generating composite chlorine dioxide for disinfecting medical wastewater according to claim 5, characterized in that: The citric acid monohydrate complies with the GB / T 9855-2008 standard.

7. The method for generating composite chlorine dioxide for disinfecting medical wastewater according to claim 5, characterized in that: The sodium sulfate complies with GB / T 6009-2003 standard.

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