CN112723591A - PH-adjustable unsymmetrical dimethylhydrazine waste liquid treatment agent and method - Google Patents
PH-adjustable unsymmetrical dimethylhydrazine waste liquid treatment agent and method Download PDFInfo
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- CN112723591A CN112723591A CN202011454442.5A CN202011454442A CN112723591A CN 112723591 A CN112723591 A CN 112723591A CN 202011454442 A CN202011454442 A CN 202011454442A CN 112723591 A CN112723591 A CN 112723591A
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- powder
- waste liquid
- trichloroisocyanuric acid
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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
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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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
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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 pH-adjustable unsymmetrical dimethylhydrazine waste liquid treatment agent and a method, which are used for solving the problem that the pH of waste liquid is alkaline after bleaching powder is independently added, so that the subsequent treatment cannot be directly carried out. In the components of the medicament, the bleaching powder and trichloroisocyanuric acid generate hypochlorous acid after being dissolved in water, have strong oxidizing property and are key components for treating unsymmetrical dimethylhydrazine waste liquid. The formulation of the medicament needs to determine the mixing proportion according to the requirements of the subsequent treatment process on the pH value. The agent treats the unsymmetrical dimethylhydrazine waste liquid according to a certain mixing ratio, on one hand, the unsymmetrical dimethylhydrazine can be rapidly degraded until the unsymmetrical dimethylhydrazine can not be detected, and on the other hand, the pH value of the treated waste liquid can be effectively adjusted, and the pH value is controlled within the range required by the subsequent treatment process.
Description
Technical Field
The invention relates to a pH-adjustable unsymmetrical dimethylhydrazine waste liquid treatment agent and a method.
Background
Unsymmetrical dimethylhydrazine is used as a conventional liquid rocket engine fuel, waste liquid is generated in the production, transportation and use processes of the unsymmetrical dimethylhydrazine, the current common treatment mode is to collect the waste liquid and discharge the waste liquid into an oxidation treatment system for treatment, a mode of adding a medicament such as bleaching powder is adopted for treatment in emergency, but the pH value of the treated waste liquid is close to 12, and the subsequent treatment cannot be directly carried out. If the subsequent treatment is needed, a certain amount of acid liquor is added to adjust the pH value to be neutral, the process is complex, and the workload is large.
Disclosure of Invention
The invention aims to overcome the defect of the existing unsymmetrical dimethylhydrazine waste liquid adding agent treatment mode, and provides a pH-adjustable unsymmetrical dimethylhydrazine waste liquid treatment agent formula which is used for solving the problem that the pH of the waste liquid is alkaline after bleaching powder is independently added, so that the subsequent treatment cannot be directly carried out.
The principle of the invention is as follows: the bleaching powder and trichloroisocyanuric acid for treating the unsymmetrical dimethylhydrazine waste liquid mainly rely on hypochlorous acid generated after the bleaching powder and trichloroisocyanuric acid are dissolved in water to further oxidize unsymmetrical dimethylhydrazine, the bleaching powder generates calcium hydroxide while generating hypochlorous acid in the water, the trichloroisocyanuric acid generates cyanuric acid while generating hypochlorous acid in the water, the reaction of the calcium hydroxide and the cyanuric acid can adjust the pH, meanwhile, the reaction is promoted to be carried out in the forward direction, and the generation of the hypochlorous acid is facilitated. Therefore, the agent can treat the unsymmetrical dimethylhydrazine waste liquid according to a certain mixing ratio, on one hand, the unsymmetrical dimethylhydrazine can be rapidly degraded, and on the other hand, the pH value of the treated waste liquid can be effectively adjusted and controlled within the range required by the subsequent treatment process.
The technical scheme of the invention is to provide a unsymmetrical dimethylhydrazine waste liquid treatment agent capable of adjusting pH, which is characterized in that: the bleaching powder comprises bleaching powder and trichloroisocyanuric acid, wherein the mass ratio of the bleaching powder to the trichloroisocyanuric acid is determined according to the requirement of a subsequent treatment process on pH.
Furthermore, the bleaching powder and trichloroisocyanuric acid are powder or aqueous solution.
Further, the mass ratio of the bleaching powder and trichloroisocyanuric acid powder mixed together is 9: 1-11: 1.
Furthermore, in order to realize that the unsymmetrical dimethylhydrazine cannot be detected after treatment, the mass ratio of the medicament formed by mixing the bleaching powder and the trichloroisocyanuric acid powder with the unsymmetrical dimethylhydrazine in the unsymmetrical dimethylhydrazine waste liquid is 10: 1.
Further, when the subsequent treatment process requires that the pH value is 7 +/-0.5, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 1: 1; when the subsequent treatment process requires that the pH value is 5 +/-0.5, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 1: 6; when the subsequent treatment process requires that the pH value is 11 +/-0.5, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 9: 1.
Further, when the subsequent treatment process requires that the pH value is 7.8, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 3: 1; when the subsequent treatment process requires that the pH value is 8.3, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 6: 1; when the subsequent treatment process requires that the pH value is 11, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 9: 1; when the subsequent treatment process requires that the pH value is 6.2, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 1: 3; when the subsequent treatment process requires that the pH value is 5.1, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 1: 6; when the subsequent treatment process requires that the pH value is 2.8, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 1: 9; when the subsequent treatment process requires that the pH value is 6.9, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 1: 1.
Furthermore, the bleaching powder is a mixture, the main component of the bleaching powder is calcium hypochlorite, and the bleaching powder also contains calcium hydroxide and calcium chloride, wherein the available chlorine is 55-60%; the available chlorine of trichloroisocyanuric acid is 85-90%.
The invention also provides a unsymmetrical dimethylhydrazine waste liquid treatment method, which is characterized by comprising the following steps:
step 1, determining the requirement of a subsequent treatment process on pH;
step 2, determining the mass ratio of the bleaching powder to the trichloroisocyanuric acid according to the requirement of the subsequent treatment process determined in the step 1 on the pH value;
step 3, determining the total mass of the bleaching powder and the trichloroisocyanuric acid powder according to the mass of the unsymmetrical dimethylhydrazine in waste liquor, wherein the mass ratio of the total mass of the bleaching powder and the trichloroisocyanuric acid powder to the mass of the unsymmetrical dimethylhydrazine in the unsymmetrical dimethylhydrazine waste liquor is 9: 1-11: 1;
step 4, weighing the bleaching powder and the trichloroisocyanuric acid powder according to the mass ratio determined in the step 2 and the total mass of the bleaching powder and the trichloroisocyanuric acid powder determined in the step 3, and uniformly mixing;
and 5, adding the uniformly mixed medicament in the step 4 into the unsymmetrical dimethylhydrazine waste liquid, detecting the pH of the treated waste liquid, performing a subsequent treatment process if the pH meets the requirement of the subsequent treatment process determined in the step 1 on the pH, or performing pH micro-adjustment until the pH meets the requirement of the subsequent treatment process determined in the step 1 on the pH, and performing the subsequent treatment.
Compared with the prior art, the invention has the following advantages and effects:
1. the agent is mainly used for rapid treatment of the added agent of the unsymmetrical dimethylhydrazine waste liquid, and ensures that the pH of the treated waste liquid meets the water inlet requirement of a subsequent treatment process. In the components of the medicament, the bleaching powder and trichloroisocyanuric acid generate hypochlorous acid after being dissolved in water, have strong oxidizing property and are key components for treating unsymmetrical dimethylhydrazine waste liquid. The formulation of the medicament needs to determine the mixing proportion according to the requirements of the subsequent treatment process on the pH value. The agent treats the unsymmetrical dimethylhydrazine waste liquid according to a certain mixing ratio, on one hand, the unsymmetrical dimethylhydrazine can be rapidly degraded, and on the other hand, the pH of the treated waste liquid can be effectively adjusted and controlled within the range required by the subsequent treatment process.
2. According to the invention, by adjusting the mass ratio of the bleaching powder and the trichloroisocyanuric acid, the unsymmetrical dimethylhydrazine can be rapidly degraded until the unsymmetrical dimethylhydrazine cannot be detected.
Detailed Description
The unsymmetrical dimethylhydrazine waste liquid treatment agent capable of adjusting the pH is a mixed agent and is prepared by mixing bleaching powder and trichloroisocyanuric acid powder in different proportions. The mixing ratio can be specifically determined according to the requirements of the subsequent treatment process on the pH. The agent treats the unsymmetrical dimethylhydrazine waste liquid according to a certain mixing ratio, on one hand, the unsymmetrical dimethylhydrazine can be rapidly degraded until the unsymmetrical dimethylhydrazine can not be detected, and on the other hand, the pH value of the treated waste liquid can be effectively adjusted, and the pH value is controlled within the range required by the subsequent treatment process.
The unsymmetrical dimethylhydrazine waste liquid can be treated by the following method, and the requirement of a subsequent treatment process on the pH value is firstly determined; secondly, determining the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder according to the requirement of the determined subsequent treatment process on the pH value; and then, determining the total mass of the bleaching powder and the trichloroisocyanuric acid powder according to the mass of the unsymmetrical dimethylhydrazine in waste liquid, weighing the bleaching powder and the trichloroisocyanuric acid powder according to the determined mass ratio, uniformly mixing, adding the uniformly mixed agent into the unsymmetrical dimethylhydrazine waste liquid, detecting the pH of the treated waste liquid, carrying out a subsequent treatment process if the pH meets the requirement of the determined subsequent treatment process on the pH, and otherwise, carrying out pH micro-adjustment until the pH of the waste liquid meets the requirement of the subsequent treatment process on the pH, and carrying out subsequent treatment.
The present invention is further illustrated by the following examples, which are illustrative of the present invention and are not to be construed as being limited thereto.
Example 1
In this example, the bleaching powder and trichloroisocyanuric acid are mixed according to the mass ratio of 1:1, 200mg/L of unsymmetrical dimethylhydrazine waste liquid (pH9.5) is treated, the unsymmetrical dimethylhydrazine and the mixed reagent are added according to the mass ratio of 1:10, the unsymmetrical dimethylhydrazine after the treatment is not detected, and the pH value of the treated waste liquid is 7.0.
Example 2
In this example, the bleaching powder and trichloroisocyanuric acid are mixed according to the mass ratio of 3:1, 200mg/L of unsymmetrical dimethylhydrazine waste liquid (pH9.5) is treated, the unsymmetrical dimethylhydrazine and the mixed reagent are added according to the mass ratio of 1:10, the unsymmetrical dimethylhydrazine after the treatment is not detected, and the pH value of the treated waste liquid is 7.8.
Example 3
In this example, the bleaching powder and trichloroisocyanuric acid are mixed according to the mass ratio of 6:1, 200mg/L of unsymmetrical dimethylhydrazine waste liquid (pH9.5) is treated, the unsymmetrical dimethylhydrazine and the mixed reagent are added according to the mass ratio of 1:10, the unsymmetrical dimethylhydrazine after the treatment is not detected, and the pH value of the treated waste liquid is 8.3.
Example 4
In this example, the bleaching powder and trichloroisocyanuric acid are mixed according to the mass ratio of 9:1, 200mg/L of unsymmetrical dimethylhydrazine waste liquid (pH9.5) is treated, the unsymmetrical dimethylhydrazine and the mixed reagent are added according to the mass ratio of 1:10, the unsymmetrical dimethylhydrazine after the treatment is not detected, and the pH value of the treated waste liquid is 11.
Example 5
In this example, the bleaching powder and trichloroisocyanuric acid are mixed according to the mass ratio of 1:3, 200mg/L of unsymmetrical dimethylhydrazine waste liquid (pH9.5) is treated, the unsymmetrical dimethylhydrazine and the mixed reagent are added according to the mass ratio of 1:10, the unsymmetrical dimethylhydrazine after the treatment is not detected, and the pH value of the treated waste liquid is 6.2.
Example 6
In this example, the bleaching powder and trichloroisocyanuric acid are mixed according to the mass ratio of 1:6, 200mg/L of unsymmetrical dimethylhydrazine waste liquid (pH9.5) is treated, the unsymmetrical dimethylhydrazine and the mixed reagent are added according to the mass ratio of 1:10, the unsymmetrical dimethylhydrazine after the treatment is not detected, and the pH value of the treated waste liquid is 5.1.
Example 7
In this example, the bleaching powder and trichloroisocyanuric acid are mixed according to the mass ratio of 1:9, 200mg/L of unsymmetrical dimethylhydrazine waste liquid (pH9.5) is treated, the unsymmetrical dimethylhydrazine and the mixed reagent are added according to the mass ratio of 1:10, the unsymmetrical dimethylhydrazine after the treatment is not detected, and the pH value of the treated waste liquid is 2.8.
Example 8
In this example, the bleaching powder and trichloroisocyanuric acid are mixed according to the mass ratio of 1:1, 2000mg/L of unsymmetrical dimethylhydrazine waste liquid (pH9.5) is treated, unsymmetrical dimethylhydrazine and the mixed reagent are added according to the mass ratio of 1:10, unsymmetrical dimethylhydrazine is not detected after treatment, and the pH value of the treated waste liquid is 6.9.
Example 9
In this example, bleaching powder and trichloroisocyanuric acid are separately treated with 200mg/L unsymmetrical dimethylhydrazine waste liquor (pH9.5) at a weight ratio of unsymmetrical dimethylhydrazine to chemical of 1:10, and the unsymmetrical dimethylhydrazine is not detected after the treatment, the pH of the waste liquor after the bleaching powder treatment is 11.5, and the pH of the waste liquor after the trichloroisocyanuric acid treatment is 2.5.
Although the present invention has been described with reference to the above embodiments, it should be understood that the scope of the present invention is not limited thereto, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (8)
1. The utility model provides a pH adjustable unsym dimethyl hydrazine waste liquid treatment medicament which characterized in that: the bleaching powder comprises bleaching powder and trichloroisocyanuric acid, wherein the mass ratio of the bleaching powder to the trichloroisocyanuric acid is determined according to the requirement of a subsequent treatment process on pH.
2. The agent for treating unsymmetrical dimethylhydrazine waste liquid with adjustable pH according to claim 1, wherein: the bleaching powder and trichloroisocyanuric acid are powder or aqueous solution.
3. The agent for treating unsymmetrical dimethylhydrazine waste liquid with adjustable pH according to claim 1 or 2, wherein: the mass ratio of the bleaching powder and the trichloroisocyanuric acid powder mixed together is 9: 1-11: 1, and the pH value of the unsymmetrical dimethylhydrazine waste liquid is 9.5.
4. The agent for treating unsymmetrical dimethylhydrazine waste liquid with adjustable pH according to claim 3, wherein: the mass ratio of the bleaching powder and trichloroisocyanuric acid powder mixed with the unsymmetrical dimethylhydrazine in the unsymmetrical dimethylhydrazine waste liquid is 10: 1.
5. The agent for treating unsymmetrical dimethylhydrazine waste liquid with adjustable pH according to claim 4, wherein: when the subsequent treatment process requires that the pH value is 7 +/-0.5, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 1: 1; when the subsequent treatment process requires that the pH value is 5 +/-0.5, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 1: 6; when the subsequent treatment process requires that the pH value is 11 +/-0.5, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 9: 1.
6. The agent for treating unsymmetrical dimethylhydrazine waste liquid with adjustable pH according to claim 5, wherein: when the subsequent treatment process requires that the pH value is 7.8, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 3: 1; when the subsequent treatment process requires that the pH value is 8.3, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 6: 1; when the subsequent treatment process requires that the pH value is 11, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 9: 1; when the subsequent treatment process requires that the pH value is 6.2, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 1: 3; when the subsequent treatment process requires that the pH value is 5.1, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 1: 6; when the subsequent treatment process requires that the pH value is 2.8, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 1: 9; when the subsequent treatment process requires that the pH value is 6.9, the mass ratio of the bleaching powder to the trichloroisocyanuric acid powder is 1: 1.
7. The agent for treating unsymmetrical dimethylhydrazine waste liquid with adjustable pH according to claim 1 or 2, wherein: the bleaching powder is a mixture, the main component of the bleaching powder is calcium hypochlorite, and the bleaching powder also contains calcium hydroxide and calcium chloride, and the available chlorine is 55-60%; the available chlorine of trichloroisocyanuric acid is 85-90%.
8. The unsymmetrical dimethylhydrazine waste liquid treatment method is characterized by comprising the following steps:
step 1, determining the requirement of a subsequent treatment process on pH;
step 2, determining the mass ratio of the bleaching powder to the trichloroisocyanuric acid according to the requirement of the subsequent treatment process determined in the step 1 on the pH value;
step 3, determining the total mass of the bleaching powder and the trichloroisocyanuric acid powder according to the mass of the unsymmetrical dimethylhydrazine in waste liquor, wherein the mass ratio of the total mass of the bleaching powder and the trichloroisocyanuric acid powder to the mass of the unsymmetrical dimethylhydrazine in the unsymmetrical dimethylhydrazine waste liquor is 9: 1-11: 1;
step 4, weighing the bleaching powder and the trichloroisocyanuric acid powder according to the mass ratio determined in the step 2 and the total mass of the bleaching powder and the trichloroisocyanuric acid powder determined in the step 3, and uniformly mixing;
and 5, adding the uniformly mixed medicament in the step 4 into the unsymmetrical dimethylhydrazine waste liquid, detecting the pH of the treated waste liquid, performing a subsequent treatment process if the pH meets the requirement of the subsequent treatment process determined in the step 1 on the pH, or performing pH micro-adjustment until the pH meets the requirement of the subsequent treatment process determined in the step 1 on the pH, and performing the subsequent treatment.
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