Stirring tank for removing CODcr (Chemical Oxygen Demand) in fluorine chemical sewage

Abstract

The utility model discloses a stirring tank for removing CODcr (Chemical Oxygen Demand) in fluorine chemical sewage, which belongs to the technical field of sewage treatment and comprises a tank body and a tank cover. The edge of the opening end of the tank body forms a tank top, a plurality of communicating pipes are arranged on the inner wall of the tank body, and one end of each communicating pipe communicates with the interior of the tank body while the other end communicates with the top of the tank top. The tank cover can be matched with the tank top, and a plurality of agent adding openings communicated with the corresponding communicating pipes are formed in the tank cover in a penetrating mode. After the communicating pipe is communicated with the medicament feeding port, the medicament can be directly conveyed to the middle area of the stirring tank, so that the medicament can quickly and uniformly enter a stirring core area, and the medicament is ensured to be fully and quickly mixed with sewage. Besides, after the tank cover is matched with the tank body, the communicating pipe and the medicament adding opening are kept in a communicating state but are not directly connected, and due to the structural design, the medicament adding efficiency is guaranteed, meanwhile, an operator can conveniently open and close the tank cover, and therefore the operation convenience is improved.

Description

Technical Field

[0001] This utility model belongs to the field of wastewater treatment technology, specifically a stirring tank for removing CODcr from fluorochemical wastewater. Background Technology

[0002] In the production of anhydrous hydrofluoric acid, the generated wastewater typically contains low concentrations of CODcr. According to the "Emission Standard of Pollutants for Inorganic Chemical Industry" (GB31573-2015), the direct discharge limit for CODcr in wastewater is 50 mg / L. Therefore, removing CODcr from wastewater has become a crucial part of the production process. Currently, many processes use hydrogen peroxide and ferrous sulfate to treat wastewater, and reduce the CODcr concentration by reacting the chemicals in a stirred tank. This process requires controlling the amount of chemicals added to the stirred tank during the reaction and ensuring that the pH value of the wastewater is maintained within the optimal reaction range to achieve efficient treatment.

[0003] Typically, pH adjusters such as lime slurry need to be precisely added based on real-time pH changes to ensure a stable reaction environment. However, due to significant differences in solvent density, adding the reagent through the top inlet of the stirred tank results in low mixing efficiency, making it difficult to quickly achieve thorough mixing of the reagent and wastewater, potentially affecting the reaction effect. Furthermore, precise pH control during the reaction is crucial. Monitoring inadequately mixed wastewater can cause pH fluctuations, and slow data feedback can lead to inaccurate reagent dosage, potentially severely impacting CODcr removal efficiency.

[0004] Some mixed tank designs incorporate an inlet pipe extending below the wastewater level to introduce chemicals and release them in the central mixing area, thereby improving mixing rate and effectiveness. However, since the inlet pipe is typically located on the tank cover, opening and closing the cover becomes more difficult, increasing operational complexity. Utility Model Content

[0005] The purpose of this invention is to provide a stirring tank for removing CODcr from fluorochemical wastewater, in order to solve the problems mentioned in the prior art.

[0006] A stirred tank for CODcr removal in fluorochemical wastewater is provided, comprising:

[0007] The tank body has an open end edge forming a tank top. The inner wall of the tank body is provided with several connecting pipes, one end of which is connected to the inside of the tank body and the other end is connected to the top of the tank top.

[0008] The can lid can be fitted with the top of the can, and the can lid has several medicine dosing ports that are connected to corresponding connecting pipes.

[0009] Further, the inner wall of the tank body extends outwardly and the extended part has a hollow structure to form an outward extension tube integrally formed with the tank body, and the communication tube is movably penetrated through the outward extension tube. The outward extension tube provides a stable mounting space and guiding structure for the communication tube, and forms a cladding for the communication tube to reduce the corrosion of sewage. The outward extension tube extends outwardly from the inner wall of the tank body, and the hollow structure reduces the thinning degree of the side wall of the tank body, thereby avoiding the influence of the structure thinning on the corrosion resistance and wear resistance of the tank body.

[0010] Further, the material of the communication tube is graphite. The corrosion resistance of graphite can ensure that the communication tube is not easily corroded in long-term contact with acidic environment, thereby prolonging the service life of the equipment and ensuring long-term stable operation of the equipment.

[0011] Further, the output end of the communication tube is provided with a guide tube, the end of the guide tube away from the communication tube is blocked, and a plurality of through holes are formed in the side wall of the guide tube. After the medicament is output from the communication tube, it is output and dispersed into the stirring tank through the guide tube and the through holes towards the stirring center, and the release of the medicament is more uniform, thereby avoiding the problem of concentrated addition of the medicament.

[0012] Further, a sealing baffle is arranged between the communication tube and the end of the outward extension tube close to the tank top. The sealing baffle effectively prevents sewage and medicament from leaking from this place, and can also maintain the air pressure between the communication tube and the outward extension tube, so that the sewage cannot seep into the area between the communication tube and the outward extension tube under the air pressure, thereby reducing the corrosion of the sewage on the inside of the outward extension tube.

[0013] Further, the medicament adding port is communicated with a medicament input pipe and an air source input pipe respectively, and a one-way valve is arranged on the medicament input pipe. The air source input pipe is used to adjust the air pressure in the communication tube, and after air is input into the communication tube, the medicament remaining in the communication tube can be discharged into the tank body, and the sewage can be prevented from flowing into the communication tube. The one-way valve ensures that the medicament can only flow in a single direction, avoids backflow, and blocks the entry of air into the medicament input pipe, so as to ensure that the air only flows to the medicament adding port.

[0014] Compared with the prior art, the beneficial effects of the present application are as follows:

[0015] After the communication tube is communicated with the medicament adding port, the output end of the communication tube extends into the tank body, and the medicament can be directly delivered to the middle region of the stirring tank, so that the medicament can quickly and uniformly enter the core region of stirring, thereby ensuring that the medicament and the sewage are fully and quickly mixed. In addition, after the tank cover is matched with the tank body, the communication tube and the medicament adding port remain in a communicated state, but are not directly connected. This structural design can not only ensure the efficiency of medicament addition, but also facilitate the operator to conveniently open and close the tank cover, thereby improving the operation convenience. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort based on the structures shown in the drawings.

[0017] Figure 1 The overall structure diagram of the stirred tank for removing CODcr in fluorinated industrial wastewater.

[0018] In the figure: 1, tank body; 11, tank top; 12, communication pipe; 121, guide pipe; 13, outer extension pipe; 14, sealing check ring; 2, tank cover; 21, reagent adding port; 22, reagent input pipe; 23, gas source input pipe; 24, one-way valve. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be described and explained in the following with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the scope of protection of the present application.

[0020] Obviously, the drawings in the following description are only some examples or embodiments of the present application, and for those skilled in the art, the present application can be applied to other similar situations without creative effort based on the drawings. In addition, it can be understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in the present application, some design, manufacture or production changes based on the technical content disclosed in the present application are only routine technical means, and should not be understood as insufficient disclosure of the content disclosed in the present application.

[0021] However, there will be some unnecessary detailed description. For example, there are some repeated descriptions of well-known matters and actual identical structures. This is to avoid the following description from becoming unnecessarily lengthy, and to facilitate the understanding of those skilled in the art. In addition, the drawings and the following description are provided for those skilled in the art to fully understand the present application, and are not intended to limit the subject matter recited in the claims.

[0022] Please refer to Figure 1As shown, in the utility model embodiment, including jar body 1 and jar cover 2. The opening end of jar body 1 forms jar top 11, and the inner wall of jar body 1 is provided with several communication pipes 12, one end of communication pipe 12 communicates with the inside of jar body 1 and the other end communicates with the top of jar top 11. Jar cover 2 can be mutually matched with jar top 11, and several medicament adding openings 21 that communicate with corresponding communication pipes 12 are penetrated through jar cover 2.

[0023] The arrangement of communication pipe 12 of the inner wall of jar body 1 can directly deliver medicament to the middle area of the stirring jar, and then can make medicament quickly and uniformly enter the core area of stirring, to ensure that medicament and sewage are fully and quickly mixed. The split type cooperation design of medicament adding opening 21 and communication pipe 12 can ensure medicament adding efficiency, and also facilitate the opening and closing of jar cover 2 by operating personnel, to improve operation convenience.

[0024] The part of the inner wall of jar body 1 extending outward forms an extension pipe 13, and the extension pipe 13 provides a stable installation space and a guide structure by covering communication pipe 12, to prevent the corrosion influence of sewage on communication pipe 12. Communication pipe 12 movably penetrates through extension pipe 13, to facilitate the replacement and maintenance of communication pipe 12. Meanwhile, the design of extension pipe 13 avoids the thinning of the side wall of jar body 1, to maintain the overall corrosion resistance of jar body 1. The design of extension pipe 13 improves the durability and stability of communication pipe 12, to ensure that communication pipe 12 will not be damaged due to corrosion or structure thinning in the long-term use process, thereby prolonging the service life of the equipment and ensuring the long-term stable operation of the equipment.

[0025] The material of communication pipe 12 is graphite, and graphite has excellent corrosion resistance, especially in an acidic environment. Since the sewage in the stirring jar has strong acidity, the graphite material of communication pipe 12 can effectively avoid corrosion problems.

[0026] A guide pipe 121 is added at the output end of communication pipe 12, and the distal end of guide pipe 121 is blocked and a through hole is formed in the side wall. After the medicament flows out of communication pipe 12, it is uniformly dispersed into the stirring jar through the through hole of guide pipe 121. This design helps the uniform distribution of medicament and avoids the concentrated addition of medicament in the jar.

[0027] A sealing baffle 14 is arranged between communication pipe 12 and extension pipe 13 close to jar top 11, to prevent mutual leakage of sewage and medicament. Sealing baffle 14 can maintain the air pressure between communication pipe 12 and extension pipe 13, so that the air pressure in extension pipe 13 will not be balanced with the outside when the liquid level in extension pipe 13 rises, thereby preventing the further rise of sewage and reducing the corrosion of sewage to the inside of extension pipe 13.

[0028] The medicament adding port 21 is respectively connected with a medicament input pipe 22 and an air source input pipe 23, the air source input pipe 23 is communicated with an external air source, and the medicament input pipe 22 is provided with a one-way valve 24. Through the design of the medicament input pipe 22 and the air source input pipe 23, the air pressure inside the communication pipe 12 is adjusted, so that the medicament remaining in the communication pipe 12 can be discharged and effectively added into the stirring tank. In addition, the one-way valve 24 ensures that the medicament can only flow in one direction, avoiding the problem of backflow and preventing gas from entering the medicament input pipe 22. The combined design of the medicament input pipe 22 and the air source input pipe 23 can ensure the efficiency and stability of medicament addition, while the one-way valve 24 prevents backflow of the medicament, ensures the directionality of medicament addition and prevents gas from mixing into the medicament storage tank, thereby improving the reliability and safety of operation.

[0029] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and embodiments having substantially the same configuration and playing the same role and effect as the technical idea within the scope of the technical solution of the present application are all included in the technical scope of the present application. In addition, within the scope of the main idea of the present application, various modifications that can be thought of by those skilled in the art, other ways constructed by combining part of the elements in the embodiments are also included in the scope of the present application.

Claims

1. A stirred tank for CODcr removal in fluorinated industrial wastewater, characterized in that, The application relates to a medicine adding device for a medicine tank. The application relates to a medicine adding device for a medicine tank. The inner wall of the tank body (1) extends outward and the extended part has a hollow structure to form an outer extension pipe (13) integrated with the tank body (1), and the communication pipe (12) penetrates the outer extension pipe (13) movably.

2. The stirred tank for removal of CODcr in fluorinated industrial wastewater according to claim 1, characterized in that, The material of the communication pipe (12) is graphite.

3. The stirred tank for removal of CODcr in fluorinated industrial wastewater according to claim 2, characterized in that, The output end of the communication pipe (12) is provided with a guide pipe (121), the far end of the guide pipe (121) is blocked, and the side wall of the guide pipe (121) is provided with a plurality of through holes.

4. The stirred tank for removal of CODcr in fluorinated industrial wastewater according to claim 2, characterized in that, The communication pipe (12) and the outer extension pipe (13) are provided with a sealing stop ring (14) near the tank top (11).

5. The stirred tank for removal of CODcr in fluorinated industrial wastewater according to claim 2, characterized in that, The medicine adding port (21) is respectively communicated with a medicine input pipe (22) and an air source input pipe (23), and the medicine input pipe (22) is provided with a one-way valve (24).

6. The stirred tank for removal of CODcr in fluorinated industrial wastewater according to claim 1, characterized in that, ​

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