Neutralization treatment device for iron oxide yellow production wastewater

Abstract

The utility model relates to a neutralization treatment device for iron oxide yellow production wastewater in the technical field of wastewater treatment, which comprises a treatment box, a plurality of lower partition plates are arranged in the treatment box, the treatment box is sequentially divided into a water inlet cavity, a plurality of mixing cavities, an aeration cavity and a water outlet cavity by the lower partition plates, an upper partition plate is arranged in each mixing cavity, and a lower partition plate is arranged in each aeration cavity. A water inlet pipe is arranged at the top end of the water inlet side of the treatment box, an outlet of the water inlet pipe extends to the bottom of the water inlet cavity, a chemical pipe is connected to the pipe section, located outside the treatment box, of the water inlet pipe, a sewage draining outlet is formed in the bottom of the mixing cavity, and a sewage draining device is connected below the sewage draining outlet. The aeration cavity is provided with an aeration assembly, a drainage pipe is arranged at the bottom of the water outlet side of the treatment box and communicated with the water outlet cavity, and the height of the lower partition plate on the water outlet side of the aeration cavity is lower than that of other lower partition plates in the treatment box. The device is simple and compact in structure, small in occupied area and high in working efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater treatment, and more specifically relates to a neutralization treatment device for yellow iron oxide production wastewater. Background Art

[0002] Yellow iron oxide is mainly produced by the reaction of sulfuric acid and iron filings to form ferrous sulfate, which is then oxidized by adding sodium hydroxide and blowing in air to form crystal nuclei. Ferrous sulfate and iron filings are then added to the crystal nucleus suspension, which is heated and oxidized by blowing in air. The product is filtered, rinsed, dried and crushed to obtain yellow iron oxide. The above production process will produce a large amount of yellow iron oxide wastewater, which contains a large amount of ferrous ions and COD and has a low pH value. If discharged into water bodies, it will cause serious pollution.

[0003] The existing neutralization treatment equipment for yellow iron oxide production wastewater has problems such as complex structure, large footprint, and low working efficiency, which need to be further improved by technical personnel in this field. Utility Model Content

[0004] The purpose of the utility model is to solve the technical problems mentioned in the above background technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a neutralization treatment device for yellow iron oxide production wastewater, including a treatment box, the bottom of the treatment box is provided with legs, the treatment box is provided with a plurality of lower baffles, the lower baffles sequentially divide the treatment box into a water inlet chamber, a mixing chamber, an aeration chamber and a water outlet chamber, wherein a plurality of mixing chambers are provided, each mixing chamber is provided with an upper baffle, the lower baffle of the mixing chamber cooperates with the upper baffle to form an S-shaped flow channel in the inner cavity of the mixing chamber, and the top of the water inlet side of the treatment box is provided with an inlet A water pipe, the outlet of the water inlet pipe extends to the bottom of the water inlet chamber, and the water inlet pipe is connected to a chemical pipe on the pipe section outside the treatment box, the chemical pipe is provided with a dosing regulating valve, a sewage outlet is provided at the bottom of the mixing chamber, a sewage discharge device is connected below the sewage outlet, an aeration chamber is provided with an aeration assembly, a drain pipe is provided at the bottom of the water outlet side of the treatment box, the drain pipe is connected to the water outlet chamber, and a drain valve is provided on the drain pipe, and the height of the lower baffle on the water outlet side of the aeration chamber is lower than the height of other lower baffles in the treatment box.

[0006] Preferably, a water wheel corresponding to the outlet of the water inlet pipe is provided at the bottom of the water inlet chamber, and the water flow at the outlet of the water inlet pipe can drive the water wheel to rotate, which can enhance the disturbance of the wastewater at the bottom of the water inlet chamber, on the one hand to enhance the mixing effect of the agent and the wastewater, and on the other hand to prevent the sediment generated during the mixing process from being deposited at the bottom of the water inlet chamber.

[0007] Preferably, the sewage discharge device is a screw conveyor, which is provided with a plurality of mud inlets, which correspond one to one with the sewage discharge outlets and are connected. After the device has been running for a period of time, the screw conveyor can be turned on and the discharge valve on the discharge port of the screw conveyor can be opened to allow the sediment deposited in the screw conveyor to be discharged outwardly.

[0008] Preferably, the aeration assembly includes an air supply pipe and an aeration main pipe, the air supply pipe is sealed and penetrated through the bottom of the aeration chamber, and the lower end of the air supply pipe is connected to an oxidation fan, the aeration main pipe is connected to the air outlet end of the air supply pipe, and a plurality of aeration ports are evenly distributed on the aeration main pipe, which are used to aerate the neutralized wastewater to achieve the purpose of reducing the COD content in the wastewater.

[0009] Preferably, a cover plate is further provided at the top of the treatment box, an exhaust pipe is provided on the cover plate, and the exhaust pipe is arranged corresponding to the aeration chamber, which is helpful for centralized discharge of waste gas generated in the wastewater treatment process.

[0010] Preferably, the exhaust pipe is provided with an activated carbon filter for filtering odor in the exhaust gas and improving the working environment.

[0011] The present invention also includes other devices or components that enable it to be used normally, all of which are conventional technical means in the field; in addition, the devices or components not limited in the present invention all adopt conventional means in the field, such as water wheels, screw conveyors, oxidation fans, activated carbon filters, etc. Those skilled in the art can select their models and installation methods according to actual usage requirements, and clearly understand how to install and control them specifically, which will not be described in detail here.

[0012] The working principle of the utility model is as follows: before the wastewater enters the treatment box, according to the wastewater flow rate in the water inlet pipe, an appropriate amount of sodium hydroxide is added to the water inlet cavity through the reagent pipe and the dosing regulating valve, the sodium hydroxide and the wastewater are pre-mitigated and a neutralization reaction occurs during the injection into the treatment box, part of the ferrous ions are removed, and then overflow into the mixing cavity through the lower partition plate on the outlet side of the water inlet cavity, and further fully mixed and a neutralization reaction occurs in the S-shaped flow channel, so that the content of ferrous ions in the wastewater is further reduced, the precipitate generated in the reaction process continuously settles at the bottom of the mixing cavity and is deposited in the conveying device, the neutralized wastewater enters the aeration cavity, the COD content is reduced after aeration, and finally overflows into the outlet cavity, the drain valve is opened, and the treated wastewater can be recycled.

[0013] Compared with the prior art, the beneficial effects of the utility model are: the device has a simple and compact structure, occupies a small area, and has high working efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model in the embodiment. DETAILED DESCRIPTION

[0016] The present invention is described in detail below in conjunction with the drawings and specific embodiments in the embodiments of the present invention. The description here is only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work, any modifications, equivalent replacements, improvements, etc., should be included in the protection scope of the present invention.

[0017] Example

[0018] like Figure 1 As shown, this embodiment proposes a neutralization treatment device for yellow iron oxide production wastewater, including a treatment box 1, the bottom of the treatment box is provided with a leg 2, the treatment box is provided with a plurality of lower baffles 3, the lower baffles divide the treatment box into a water inlet chamber 4, a mixing chamber 5, an aeration chamber 6 and a water outlet chamber 7 in sequence, wherein there are two mixing chambers, each of which is provided with an upper baffle 8, the lower baffle of the mixing chamber cooperates with the upper baffle to form an S-shaped flow channel in the inner cavity of the mixing chamber, the top of the water inlet side of the treatment box is provided with a water inlet pipe 9, the The outlet of the water inlet pipe extends to the bottom of the water inlet chamber, and a chemical pipe 10 is connected to the pipe section of the water inlet pipe outside the treatment box, and a dosing regulating valve 11 is provided on the chemical pipe. A sewage outlet 12 is provided at the bottom of the mixing chamber, and a sewage discharge device 13 is connected below the sewage outlet. The aeration chamber is provided with an aeration assembly, and a drain pipe 14 is provided at the bottom of the water outlet side of the treatment box. The drain pipe is connected to the water outlet chamber, and a drain valve 15 is provided on the drain pipe. The height of the lower baffle on the water outlet side of the aeration chamber is lower than the height of other lower baffles in the treatment box.

[0019] Specifically, the sewage discharge device is a screw conveyor, and the screw conveyor is provided with a plurality of mud inlets, which correspond to the sewage discharge outlets one by one and are connected. After the device has been running for a period of time, the screw conveyor can be turned on and the discharge valve 16 on the discharge port of the screw conveyor can be opened to discharge the sediment deposited in the screw conveyor. The aeration component includes an air supply pipe 17 and an aeration main pipe 18, the air supply pipe is sealed and penetrated at the bottom of the aeration chamber, and the lower end of the air supply pipe is connected to an oxidation fan 19, the aeration main pipe is connected to the air outlet end of the air supply pipe, and a plurality of aeration ports 20 are evenly distributed on the aeration main pipe, which are used to aerate the neutralized wastewater to achieve the purpose of reducing the COD content in the wastewater.

[0020] In addition, a cover plate 21 is provided on the top of the treatment box, and an exhaust pipe 22 is provided on the cover plate. The exhaust pipe is arranged corresponding to the aeration chamber, which is helpful for centralized discharge of the exhaust gas generated during the wastewater treatment process. An activated carbon filter 23 is provided on the exhaust pipe to filter the odor in the exhaust gas and improve the working environment.

[0021] In this embodiment, a water wheel 24 corresponding to the outlet of the water inlet pipe is provided at the bottom of the water inlet chamber. The water flow at the outlet of the water inlet pipe can drive the water wheel to rotate. By providing the water wheel, the disturbance of the wastewater at the bottom of the water inlet chamber can be enhanced. On the one hand, the mixing effect of the agent and the wastewater is enhanced, and on the other hand, the sediment generated during the mixing process can be prevented from being deposited at the bottom of the water inlet chamber.

[0022] The working principle of the utility model is as follows: before the wastewater enters the treatment box, according to the wastewater flow rate in the water inlet pipe, an appropriate amount of sodium hydroxide is added to the water inlet cavity through the reagent pipe and the dosing regulating valve, the sodium hydroxide and the wastewater are pre-mitigated and a neutralization reaction occurs during the injection into the treatment box, part of the ferrous ions are removed, and then overflow into the mixing cavity through the lower partition plate on the outlet side of the water inlet cavity, and further fully mixed and a neutralization reaction occurs in the S-shaped flow channel, so that the content of ferrous ions in the wastewater is further reduced, the precipitate generated in the reaction process continuously settles at the bottom of the mixing cavity and is deposited in the conveying device, the neutralized wastewater enters the aeration cavity, the COD content is reduced after aeration, and finally overflows into the outlet cavity, the drain valve is opened, and the treated wastewater can be recycled.

[0023] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A neutralization treatment device for yellow iron oxide production wastewater, comprising a treatment box, the bottom of which is provided with legs, characterized in that: A plurality of lower baffles are provided in the treatment box, and the lower baffles divide the treatment box into a water inlet chamber, a mixing chamber, an aeration chamber and a water outlet chamber in sequence, wherein a plurality of mixing chambers are provided, and an upper baffle is provided in each mixing chamber, and the lower baffle of the mixing chamber cooperates with the upper baffle to form an S-shaped flow channel in the inner cavity of the mixing chamber, and a water inlet pipe is provided at the top of the water inlet side of the treatment box, and the outlet of the water inlet pipe extends to the bottom of the water inlet chamber, and a chemical pipe is connected to the pipe section of the water inlet pipe outside the treatment box, and a dosing regulating valve is provided on the chemical pipe, and a sewage outlet is provided at the bottom of the mixing chamber, and a sewage discharge device is connected below the sewage outlet, and the aeration chamber is provided with an aeration assembly, and a drain pipe is provided at the bottom of the water outlet side of the treatment box, and the drain pipe is connected to the water outlet chamber, and a drain valve is provided on the drain pipe, and the height of the lower baffle on the water outlet side of the aeration chamber is lower than the height of other lower baffles in the treatment box.

2. The neutralization treatment device for yellow iron oxide production wastewater according to claim 1, characterized in that: A water wheel corresponding to the outlet of the water inlet pipe is arranged at the bottom of the water inlet cavity, and the water flow at the outlet of the water inlet pipe can drive the water wheel to rotate.

3. The neutralization treatment device for yellow iron oxide production wastewater according to claim 1, characterized in that: The sewage discharge device is a screw conveyor, and a plurality of mud inlets are arranged on the screw conveyor. The mud inlets correspond to the sewage discharge outlets one by one and are connected.

4. The neutralization treatment device for yellow iron oxide production wastewater according to claim 1, characterized in that: The aeration assembly includes an air supply pipe and an aeration main pipe. The air supply pipe is sealed and penetrated through the bottom of the aeration chamber, and the lower end of the air supply pipe is connected to an oxidation fan. The aeration main pipe is connected to the air outlet end of the air supply pipe, and a plurality of aeration ports are evenly distributed on the aeration main pipe.

5. The neutralization treatment device for yellow iron oxide production wastewater according to claim 1, characterized in that: A cover plate is also provided on the top of the treatment box, an exhaust pipe is provided on the cover plate, and the exhaust pipe is arranged corresponding to the aeration chamber.

6. The neutralization treatment device for yellow iron oxide production wastewater according to claim 5, characterized in that: An activated carbon filter is arranged on the exhaust pipe.

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