Three-stage settling reaction device for treating wastewater of n-hn initiating explosive

Abstract

A kind of NHN initiating explosive wastewater treatment three-stage sedimentation reaction device, it relates to a wastewater treatment device, the utility model discloses a kind of NHN initiating explosive wastewater three-stage sedimentation device, it includes: primary sedimentation tank (1), primary suction filtration (2), waste liquid head tank (3), secondary sedimentation tank (4), tertiary sedimentation tank (5), second suction filtration (6), buffer tank (7), neutralization tank (8), equipment room connecting pipeline, valve, intermediate tank, gas conveying device, liquid conveying device, control and display instrument and accessories.The device given in the application is used to carry out NHN initiating explosive wastewater three-stage sedimentation treatment, and energy consumption is low, which greatly saves cost.Waste liquid and sodium hydroxide in the secondary sedimentation tank are fully flowed and mixed to react more fully, and the treatment is more thorough.The device has low investment, small floor area, large operation flexibility, low energy consumption and easy operation control.

Description

Technical Field

[0001] This utility model relates to a wastewater treatment device, and more particularly to a three-stage sedimentation reaction device for treating NHN detonating explosive wastewater. Background Technology

[0002] In accordance with the important requirements of "human-machine separation, human-explosive separation, and machine replacement of human" in the "14th Five-Year Plan for the Safety Development of the Civil Explosives Industry", the NHN detonator production line is used to produce NHN detonators. The existing wastewater treatment facilities have low efficiency, high energy consumption, and cannot meet the production needs.

[0003] To address the issues of low production efficiency, high energy consumption, and inability to meet production needs in wastewater treatment facilities, the overall repair and renovation of wastewater treatment facilities can ensure that all emission indicators after wastewater treatment meet the aforementioned emission standards. This is of great significance in improving production efficiency while also protecting the environment. Summary of the Invention

[0004] The purpose of this invention is to provide a three-stage sedimentation reaction device for treating NHN detonating explosive wastewater. In this device, the waste liquid participating in the reaction and sodium hydroxide flow and mix more fully in the secondary sedimentation tank, resulting in more thorough treatment and achieving three-stage sedimentation treatment of detonating explosive wastewater.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] A three-stage sedimentation reaction device for treating NHN detonating explosive wastewater includes a primary sedimentation tank, a primary filtration unit, a high-level wastewater tank, a secondary sedimentation tank, a tertiary sedimentation tank, a second filtration unit, a buffer tank, a neutralization tank, connecting pipelines between equipment, valves, an intermediate tank, a gas conveying device, a liquid conveying device, control and display instruments, and accessories. The primary sedimentation tank has a wastewater outlet. The primary sedimentation tank is connected to the inlet of the high-level wastewater tank via a pipeline through the primary filtration unit. The outlet of the high-level wastewater tank is connected to the inlet of the secondary sedimentation tank via a pipeline. The outlet of the secondary sedimentation tank is connected to the inlet of the tertiary sedimentation tank via a pipeline. The outlet of the tertiary sedimentation tank is connected to the inlet of the buffer tank via a pipeline through the second filtration unit. The outlet of the buffer tank is connected to the inlet of the neutralization tank via a pipeline.

[0007] The advantages and effects of this utility model are:

[0008] 1. This utility model device achieves three-stage sedimentation treatment of wastewater from detonation explosives;

[0009] 2. This utility model device greatly saves costs.

[0010] 3. In this utility model device, the waste liquid participating in the reaction and sodium hydroxide flow and mix more fully in the secondary sedimentation tank, resulting in a more thorough treatment.

[0011] 4. This utility model device requires less investment, occupies less space, has greater operational flexibility, consumes less energy, and is easy to operate and control. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation

[0013] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings.

[0014] As shown in the figure, this utility model includes a two-stage sedimentation tank and a three-stage sedimentation tank. Wastewater treated in the two-stage sedimentation tank enters the three-stage sedimentation tank for neutralization before being discharged in compliance with standards. The NHN detonating explosive wastewater three-stage sedimentation device includes: a primary sedimentation tank 1, a primary filtration unit 2, a high-level wastewater tank 3, a secondary sedimentation tank 4, a tertiary sedimentation tank 5, a second filtration unit 6, a buffer tank 7, a neutralization tank 8, connecting pipelines between equipment rooms, valves, an intermediate tank, a gas conveying device, a liquid conveying device, control and display instruments, and accessories. The primary sedimentation tank 1 is connected to the inlet of the high-level wastewater tank 3 via the primary filtration unit 2 through a pipeline; the outlet of the high-level wastewater tank 3 is connected to the inlet of the secondary sedimentation tank 4 via a pipeline; the outlet of the secondary sedimentation tank 4 is connected to the inlet of the tertiary sedimentation tank 5 via a pipeline; the outlet of the tertiary sedimentation tank 5 is connected to the inlet of the buffer tank 7 via the second filtration unit 6 through a pipeline; and the outlet of the buffer tank 7 is connected to the inlet of the neutralization tank 8 via a pipeline.

[0015] During operation, sodium nitrite and nitric acid solutions are added to the NHN detonation wastewater in primary settling tank 1 for detonation. The mixture is stirred for 25-30 minutes, followed by the addition of sodium hydroxide solution for settling, resulting in precipitate. The wastewater after detonation is then filtered through primary settling tank 1 and then pumped into high-level waste tank 3. The nickel hydroxide residue from primary filtration 2 is collected, stored in the hazardous waste room, and entrusted to a third party for disposal. The secondary sedimentation tank 4 is equipped with a wastewater inlet, and the outlet of the waste liquid high-level tank 3 is connected to the inlet of the secondary sedimentation tank 4 via a pipeline. The wastewater from the explosion naturally flows into the secondary sedimentation tank 4 from the waste liquid high-level tank 3. The outlet of the secondary sedimentation tank 4 is connected to the inlet of the tertiary sedimentation tank 5 via a pipeline. The wastewater is siphoned from the secondary sedimentation tank 4 to the tertiary sedimentation tank 5 using the natural drop of the mountain. Sodium hydroxide solution is added for sedimentation and air agitation to generate precipitates again. The outlet of the tertiary sedimentation tank 5 is connected to the second filtration tank 6 via a pipeline. After passing through the second filtration tank 6, the wastewater from the tertiary sedimentation tank 5 enters the buffer tank 7. The second filtration tank 6 is equipped with a nickel hydroxide residue collection system. The turbid liquid undergoes solid-liquid separation through the second filtration tank 6. The wastewater is filtered into the buffer tank 7, and the filtration residue is collected, stored in the hazardous waste room, and entrusted to a third party for disposal. The outlet of the buffer tank 7 is connected to the inlet of the neutralization tank 8 via a pipeline. The wastewater enters the inlet of the neutralization tank 8 from the outlet of the buffer tank 7, and an acidic solution is slowly added to the neutralization tank 8. Once the pH value reaches between 6 and 8, the wastewater treatment process is complete. After standing for 24 hours, the nickel content of the waste liquid is analyzed using physicochemical methods. If it meets the standards, it is discharged through the outlet.

Claims

1. A three-stage sedimentation reaction device for treating NHN detonating explosive wastewater, characterized in that, The device includes a primary sedimentation tank (1), a primary filtration tank (2), a high-level wastewater tank (3), a secondary sedimentation tank (4), a tertiary sedimentation tank (5), a second filtration tank (6), a buffer tank (7), a neutralization tank (8), connecting pipelines between equipment, valves, intermediate tanks, gas conveying devices, liquid conveying devices, control and display instruments and accessories; the primary sedimentation tank (1) is provided with a wastewater outlet; the primary sedimentation tank (1) is connected to the inlet of the high-level wastewater tank (3) via the primary filtration tank (2) through a pipeline; the outlet of the high-level wastewater tank (3) is connected to the inlet of the secondary sedimentation tank (4) via a pipeline; the outlet of the secondary sedimentation tank (4) is connected to the inlet of the tertiary sedimentation tank (5) via a pipeline; the outlet of the tertiary sedimentation tank (5) is connected to the inlet of the buffer tank (7) via the second filtration tank (6) through a pipeline; the outlet of the buffer tank (7) is connected to the inlet of the neutralization tank (8) via a pipeline.

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