Inorganic waste liquid harmless treatment process

Abstract

The invention relates to the technical field of environmental engineering, and discloses an inorganic waste liquid innocent treatment process which comprises the following steps: step 1, a pretreatment stage: receiving and homogenizing waste liquid, and then carrying out pH regulation and precipitation separation; 2, a physical treatment stage: establishing physical pools X and Y for physical treatment; step 3, deep treatment stage I: establishing chemical treatment rings a and b, and performing chemical reagent treatment on the waste liquid in pipelines of the chemical treatment rings a and b; step 4, deep treatment stage 2: establishing biological treatment circles c and d, and carrying out biodegradation on the waste liquid in pipelines of the biological treatment circles c and d; and step 5, discharging the purified waste liquid: discharging the purified waste liquid to an irrigation system for treatment when the data of the purified waste liquid obtained through the treatment in the step 4 and the online monitored data of the purified waste liquid reach the discharge standard, and replacing a chemical tank and a microbial tank in the prior art with a chemical treatment circle and a microbial treatment circle. The occupied area of the chemical tank and the microorganism tank can be effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental engineering, in particular to a harmless treatment process for inorganic waste liquid. Background Art

[0002] The harmless treatment process of inorganic waste liquid is a technical means for purifying, separating and reusing organic waste liquid containing high concentrations of inorganic particles. These waste liquids come from the conversion process of oil, coal and natural gas, as well as the petrochemical industry. Through specific technical means, such as supercritical water oxidation technology and gas cyclone field technology, the purification, separation and reuse of waste liquids can be achieved efficiently, thereby reducing pollution to the environment. However, the solid-liquid separation technology in the existing technology is not only ineffective in treating inorganic waste liquids with high solid content, but also occupies a large area in multiple treatment tanks during treatment, and has poor treatment effect on waste liquids with high solid content, resulting in the failure to effectively remove some harmful substances, thereby posing a potential threat to the environment. Therefore, further research and innovation are needed to develop more efficient, environmentally friendly and economical treatment technologies to achieve true sustainable development. Summary of the Invention

[0003] (1) Technical problems solved

[0004] In response to the shortcomings of the existing technology, the present invention provides a harmless treatment process for inorganic waste liquid, which has the advantages of high efficiency, environmental protection and small footprint, and solves the problem that the solid-liquid separation technology in the existing technology is poor in effect and occupies a large area when treating inorganic waste liquid with high solid content.

[0005] (2) Technical solution

[0006] To achieve the above object, the present invention provides the following technical solution: a harmless treatment process for inorganic waste liquid, comprising the following steps:

[0007] Step 1, pretreatment stage: waste liquid reception and homogenization, followed by pH adjustment and precipitation separation;

[0008] Step 2, physical processing stage: establish physical pools X and Y for physical processing;

[0009] Step 3, deep treatment stage 1: chemical treatment loops a and b are established, and the waste liquid is treated with chemical reagents in the pipelines of chemical treatment loops a and b;

[0010] Step 4, Advanced Treatment Phase 2: Establish biological treatment circles c and d, where wastewater undergoes biodegradation;

[0011] Step 5, purified waste liquid discharge stage: Through the treatment of step 4, purified waste liquid is obtained. When the online monitoring data of the purified waste liquid meet the discharge standards, it is discharged to the irrigation system for treatment to achieve secondary utilization.

[0012] Preferably, the step 1 of waste liquid reception and homogenization: after the waste liquid enters the treatment system, it is homogenized.

[0013] Preferably, in step 1, pH adjustment is performed by monitoring the pH value of the waste liquid through an online monitoring instrument, and automatically adding acid or alkali according to the monitoring result to adjust the pH value of the waste liquid to an appropriate range.

[0014] Preferably, in the step 1, the precipitation separation is as follows: the waste liquid after pH adjustment flows into the physical treatment tank X, a precipitant is added to precipitate the heavy metal ions and inorganic harmful substances in the waste liquid, and the precipitate is separated by a collection system at the bottom of the physical tank and transferred to the outside of the treatment tank X for solidification and stabilization treatment.

[0015] Preferably, in the physical treatment stage of step three: a treatment framework of physical pools X and Y is established, the waste liquid is preliminarily treated in physical pool X, and when the waste liquid test data monitored by the online instrument of physical pool X shows that it is qualified, it directly enters the chemical treatment circle; when the waste liquid test data monitored by the online instrument of physical pool X shows that it exceeds the standard, the waste liquid enters physical pool Y for secondary treatment.

[0016] Preferably, the physical pool X is used for preliminary treatment of waste liquid, and the waste liquid is treated by filtration and sedimentation. The physical pool X is mainly used to remove suspended solids and particulate matter in the waste liquid. The physical pool Y is used for secondary treatment to further remove pollutants that are not removed in the waste liquid of the physical pool X. The physical pool Y uses a combination of flotation and centrifugal separation to treat the waste liquid.

[0017] Preferably, in the first deep treatment stage of the step three, chemical treatment is performed by establishing chemical treatment circles a and b, the waste liquid enters the chemical treatment circle a, and chemical filtration is performed, and a new filter screen is set at 1 / 3 and 3 / 4 of the pipeline of the chemical treatment circle a; to further remove solid pollutants, a pipeline chemical reagent addition point is added at 2 / 3 of the pipeline of the chemical treatment circle a, and a network processor is connected to the pipeline chemical reagent addition point to automatically select and add the corresponding type of chemical reagent according to the type of waste liquid.

[0018] Preferably, in the deep treatment stage 1 of the step 3: when the chemical monitoring instrument shows that the detection data of the waste liquid in the chemical treatment circle a is qualified, it directly enters the biological treatment circle c; when the chemical monitoring instrument shows that the detection data of the waste liquid in the chemical treatment circle a exceeds the standard, the waste liquid enters the chemical treatment circle b for secondary treatment, and a pipeline chemical reagent addition point is added at 1 / 3 of the pipeline of the chemical treatment circle b, and the drug is added automatically.

[0019] Preferably, in the second deep treatment stage of step 4, biological treatment circles c and d are established, and the waste liquid is biodegraded in the biological treatment circle c, wherein the pipeline of the biological treatment circle c contains various types of microorganisms.

[0020] Preferably, in the second deep treatment stage of the step four, when the biological monitoring instrument detects that the waste liquid test data of the biological treatment circle c is qualified, it is directly discharged; when the biological monitoring instrument detects that the waste liquid test data of the biological treatment circle c exceeds the standard, the waste liquid enters the biological treatment circle d for secondary treatment, and the type of microorganisms is increased in the pipeline of the biological treatment circle d, the pipeline flow is limited, or a new filter is added to treat the waste liquid.

[0021] Compared with the prior art, the present invention provides a harmless treatment process for inorganic waste liquid, which has the following beneficial effects:

[0022] 1. The present invention establishes a treatment framework for physical tanks X and Y during the physical treatment stage. The waste liquid undergoes preliminary treatment in physical tank X. When the waste liquid test data monitored by the online instrument in physical tank X indicates that it is qualified, it directly enters the chemical treatment loop. When the waste liquid test data monitored by the online instrument in physical tank X indicates that it exceeds the standard, the waste liquid enters physical tank Y for secondary treatment to remove more suspended solids, particulate matter, and pollutants. This solves the problem that the existing solid-liquid separation technology is not effective in treating inorganic waste liquids with high solids content.

[0023] 2. By establishing two physical treatment pools, two chemical treatment circles and two microbial treatment circles, and setting up automatic treatment facilities and online monitoring instruments, when the waste liquid monitoring data is unqualified, it can be quickly transferred to the spare pool or circle for treatment, reducing the circulation time in a single pool or circle, thereby reducing the treatment cost and saving treatment time. By establishing chemical treatment circles and microbial treatment circles to replace the chemical pools and microbial pools in the existing technology, the area occupied by the chemical pools and microbial pools can also be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a process flow chart of the present invention. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] See also Figure 1 , a harmless treatment process for inorganic waste liquid, comprising the following steps:

[0027] Step 1, pretreatment stage: waste liquid reception and homogenization, followed by pH adjustment and precipitation separation;

[0028] Step 2, physical processing stage: establish physical pools X and Y for physical processing;

[0029] Step 3, deep treatment stage 1: chemical treatment loops a and b are established, and the waste liquid is treated with chemical reagents in the pipelines of chemical treatment loops a and b;

[0030] Step 4, Advanced Treatment Phase 2: Establish biological treatment circles c and d, where wastewater undergoes biodegradation;

[0031] Step 5, purified waste liquid discharge stage: Through the treatment of step 4, purified waste liquid is obtained. When the online monitoring data of the purified waste liquid meet the discharge standards, it is discharged to the irrigation system for treatment to achieve secondary utilization.

[0032] Specifically, step 1 is waste liquid reception and homogenization: after the waste liquid enters the treatment system, it is first homogenized to ensure that the properties of the waste liquid are uniform, which is convenient for subsequent treatment.

[0033] Specifically, in step 1, pH adjustment: the pH value of the waste liquid is monitored by an online monitoring instrument, and acid or alkali is automatically added according to the monitoring results to adjust the pH of the waste liquid to an appropriate range, creating conditions for subsequent treatment.

[0034] Specifically, in step 1, the precipitation separation is as follows: the waste liquid after pH adjustment flows into the physical treatment tank X, and a precipitant is added to precipitate the heavy metal ions and inorganic harmful substances in the waste liquid. The precipitate is separated by a collection system at the bottom of the physical tank and transferred to the outside of the treatment tank X for solidification and stabilization treatment.

[0035] Specifically, physical pool X is used for preliminary treatment of waste liquid, using filtration and sedimentation to treat the waste liquid. Physical pool X is mainly used to remove suspended solids and particulate matter in the waste liquid. Physical pool Y is used for secondary treatment to further remove pollutants not removed from the waste liquid in physical pool X to achieve higher purification standards. Physical pool Y uses a combination of flotation and centrifugal separation to treat the waste liquid to improve treatment efficiency.

[0036] Example 1

[0037] Physical treatment stage: Establish the treatment framework of physical pools X and Y. The waste liquid undergoes preliminary treatment in physical pool X. When the waste liquid test data monitored by the online instrument of physical pool X shows that it is qualified, it directly enters the chemical treatment circle. When the waste liquid test data monitored by the online instrument of physical pool X shows that it exceeds the standard, the waste liquid enters physical pool Y for secondary treatment to remove more suspended solids, particulate matter and pollutants.

[0038] Comparative Example 1

[0039] Physical treatment stage: Establish the treatment framework of physical pool X, and the waste liquid is chemically treated in physical pool X. When the waste liquid test data monitored by the online instrument of physical pool X shows that it is qualified, it directly enters the chemical treatment circle; when the waste liquid test data monitored by the online instrument of physical pool X shows that it exceeds the standard, the waste liquid continues to be circulated in physical pool X until it passes and enters the next stage.

[0040] Table 1 summarizes the impact of the treatment frameworks of Example 1 and Comparative Example 1 on the treatment of inorganic waste liquid, as follows:

[0041] Table 1

[0042]

[0043]

[0044] As can be seen from Table 1, Example 1 is superior to Comparative Example 1 in all aspects. This advantage shows that the method of Example 1 is more efficient, economical and environmentally friendly, and is the best choice for physical treatment of specific types of waste liquid.

[0045] Example 2

[0046] Deep treatment stage one: Chemical treatment is carried out by establishing chemical treatment circles a and b. The waste liquid enters the chemical treatment circle a for chemical filtration. New filter screens are set at 1 / 3 and 3 / 4 of the pipeline of the chemical treatment circle a. To further remove solid pollutants, a pipeline chemical reagent addition point is added at 2 / 3 of the pipeline of the chemical treatment circle a, and a network processor is connected to the pipeline chemical reagent addition point to automatically select and add the corresponding type of chemical reagent according to the type of waste liquid.

[0047] Comparative Example 2

[0048] Deep treatment stage 1: Chemical treatment is carried out by establishing chemical treatment circles a and b. The waste liquid enters the chemical treatment circle a for chemical filtration. A pipeline chemical reagent addition point is added at 1 / 3 of the pipeline of the chemical treatment circle a, and a network processor is connected to the pipeline chemical reagent addition point to automatically select and add the corresponding type of chemical reagent according to the type of waste liquid.

[0049] Table 2 summarizes the effects of chemical treatment on inorganic waste liquid treatment in Example 2 and Comparative Example 2, as follows:

[0050] Table 2

[0051]

[0052]

[0053] From the data in Table 2 above, it is understood that Example 2 shows higher processing efficiency and lower chemical reagent consumption compared to Comparative Example 2 by setting new filter screens at 1 / 3 and 3 / 4 of the pipeline in the chemical treatment circle a, adding a pipeline chemical reagent addition point at 2 / 3 of the pipeline, and connecting the network processor to automatically select and add the corresponding type of chemical reagent.

[0054] Example 3

[0055] Deep treatment stage 1: When the chemical monitoring instrument shows that the test data of the waste liquid in the chemical treatment circle a is qualified, it directly enters the biological treatment circle c. When the chemical monitoring instrument shows that the test data of the waste liquid in the chemical treatment circle a exceeds the standard, the waste liquid enters the chemical treatment circle b for secondary treatment. A pipeline chemical reagent addition point is added at 1 / 3 of the pipeline of the chemical treatment circle b, and automatic dosing is used to improve the treatment efficiency.

[0056] Comparative Example 3

[0057] Deep treatment stage 1: When the chemical monitoring instrument shows that the test data of the waste liquid in chemical treatment circle a is qualified, it directly enters the biological treatment circle c. When the chemical monitoring instrument shows that the test data of the waste liquid in chemical treatment circle a exceeds the standard, the waste liquid enters the chemical treatment circle a for self-circulation treatment.

[0058] The laboratory compared the chemical reagents consumed and the processing time of Example 3 and Comparative Example 3. The consumption of chemical reagents in Example 3 was lower than that in Comparative Example 3, and the processing time in Example 3 was also lower than that in Comparative Example 3.

[0059] Example 4

[0060] Deep treatment stage two: By establishing biological treatment circles c and d, the waste liquid is biodegraded in the biological treatment circle c. The pipes of the biological treatment circle c contain various types of microorganisms, which use microorganisms to convert organic matter into harmless substances. When the biological monitoring instrument detects that the waste liquid test data of the biological treatment circle c is qualified, it is directly discharged; when the biological monitoring instrument detects that the waste liquid test data of the biological treatment circle c exceeds the standard, the waste liquid enters the biological treatment circle d for secondary treatment, and the type of microorganisms in the pipes of the biological treatment circle d is increased, the pipe flow is limited, or a new filter is added to treat the waste liquid.

[0061] Comparative Example 4

[0062] Deep treatment stage two: By establishing a biological treatment circle c, the waste liquid is biodegraded in the biological treatment circle c. The pipes of the biological treatment circle c contain various types of microorganisms, which use microorganisms to convert organic matter into harmless substances. When the biological monitoring instrument detects that the waste liquid test data of the biological treatment circle c is qualified, it is directly discharged; when the biological monitoring instrument detects that the waste liquid test data of the biological treatment circle c exceeds the standard, the waste liquid is self-circulated in the biological treatment circle c, and the amount of microorganisms is adjusted until the waste liquid treatment is qualified.

[0063] Table 3

[0064]

[0065]

[0066] As can be seen from Table 3, the COD value in Example 4 is lower than that in Comparative Example 4, indicating that the organic matter content is low and the water quality is cleaner. The BOD value of Example 4 is lower than that in Comparative Example 4, indicating that there are fewer biodegradable organic matters in the water and the water body has a stronger self-purification ability. The TSS value of Example 4 is lower than that in Comparative Example 4, indicating that there are fewer suspended solids in the water and the water quality is clearer. The ammonia nitrogen concentration in Example 4 is lower than that in Comparative Example 4, and its purification process can reduce the potential toxicity of water quality to aquatic organisms. The total phosphorus content in Example 4 is lower than that in Comparative Example 4, which helps to control eutrophication of water bodies.

[0067] Through the above data analysis, Example 4 is superior to Comparative Example 4 in all indicators, indicating that the harmless treatment effect of the microbial treatment method is the best, and it can treat inorganic waste liquid, purify water quality and save reagents while reducing environmental pollution.

[0068] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A harmless treatment process for inorganic waste liquid, characterized in that: The following steps are involved: Step 1, pretreatment stage: waste liquid reception and homogenization, followed by pH adjustment and precipitation separation; Step 2, physical processing stage: establish physical pools X and Y for physical processing; Step 3, deep treatment stage 1: chemical treatment loops a and b are established, and the waste liquid is treated with chemical reagents in the pipelines of chemical treatment loops a and b; Step 4, Advanced Treatment Phase 2: Establish biological treatment circles c and d, where wastewater undergoes biodegradation; Step 5, purified waste liquid discharge stage: Through the treatment of step 4, purified waste liquid is obtained. When the online monitoring data of the purified waste liquid meet the discharge standards, it is discharged to the irrigation system for treatment to achieve secondary utilization.

2. The process for harmless treatment of inorganic waste liquid according to claim 1, characterized in that: The first step of waste liquid reception and homogenization is to perform homogenization treatment on the waste liquid after it enters the treatment system.

3. The process for harmless treatment of inorganic waste liquid according to claim 1, characterized in that: pH adjustment in step 1: the pH value of the waste liquid is monitored by an online monitoring instrument, and acid or alkali is automatically added according to the monitoring result to adjust the pH value of the waste liquid to an appropriate range.

4. The process for harmless treatment of inorganic waste liquid according to claim 1, characterized in that: In the step 1, the waste liquid after pH adjustment flows into the physical treatment tank X, and a precipitant is added to precipitate the heavy metal ions and inorganic harmful substances in the waste liquid. The precipitate is separated by a collection system at the bottom of the physical tank and transferred to the outside of the treatment tank X for solidification and stabilization treatment.

5. The process for harmless treatment of inorganic waste liquid according to claim 1, characterized in that: In the third step, the physical treatment phase, a treatment framework of physical pools X and Y is established. The waste liquid is initially treated in physical pool X. When the waste liquid test data monitored by the online instrument of physical pool X shows that it is qualified, the waste liquid directly enters the chemical treatment circle. When the waste liquid test data monitored by the online instrument of physical pool X shows that it exceeds the standard, the waste liquid enters physical pool Y for secondary treatment.

6. The process for harmless treatment of inorganic waste liquid according to claim 5, characterized in that: The physical pool X is used for preliminary treatment of waste liquid, and the waste liquid is treated by filtration and sedimentation. The physical pool X is mainly used to remove suspended solids and particulate matter in the waste liquid. The physical pool Y is used for secondary treatment to further remove pollutants that are not removed in the waste liquid of the physical pool X. The physical pool Y uses a combination of flotation and centrifugal separation to treat the waste liquid.

7. The process for harmless treatment of inorganic waste liquid according to claim 1, characterized in that: In the first stage of deep treatment in step 3, chemical treatment is performed by establishing chemical treatment loops a and b. The waste liquid enters the chemical treatment loop a and is chemically filtered. A new filter screen is installed at 1 / 3 and 3 / 4 of the pipe of the chemical treatment loop a. In order to further remove solid pollutants, a pipeline chemical reagent addition point is added at 2 / 3 of the pipeline of chemical treatment circle a, and a network processor is connected to the pipeline chemical reagent addition point to automatically select and add the corresponding type of chemical reagent according to the type of waste liquid.

8. The process for harmless treatment of inorganic waste liquid according to claim 7, characterized in that: In the deep treatment stage 1 of step 3, when the chemical monitoring instrument shows that the detection data of the waste liquid in the chemical treatment circle a is qualified, it directly enters the biological treatment circle c. When the chemical monitoring instrument shows that the detection data of the waste liquid in the chemical treatment circle a exceeds the standard, the waste liquid enters the chemical treatment circle b for secondary treatment. A pipeline chemical reagent addition point is added at 1 / 3 of the pipeline of the chemical treatment circle b, and the drug is added automatically.

9. The process for harmless treatment of inorganic waste liquid according to claim 1, characterized in that: In the second stage of deep treatment in step 4, biological treatment circles c and d are established, and the waste liquid is biodegraded in the biological treatment circle c, wherein the pipeline of the biological treatment circle c contains various types of microorganisms.

10. The process for harmless treatment of inorganic waste liquid according to claim 9, characterized in that: In the second stage of deep treatment in step 4, when the biological monitoring instrument detects that the waste liquid test data of the biological treatment circle c is qualified, it is directly discharged; when the biological monitoring instrument detects that the waste liquid test data of the biological treatment circle c exceeds the standard, the waste liquid enters the biological treatment circle d for secondary treatment, and the type of microorganisms is increased in the pipeline of the biological treatment circle d, the pipeline flow is limited, or a new filter is added to treat the waste liquid.

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