Preparation device of calcium peroxide and attapulgite wastewater treatment composite material

Abstract

The utility model discloses a calcium peroxide and attapulgite waste water treatment composite material preparation device which comprises a stirrer base, a stirrer is arranged at the upper end of the stirrer base, a stirrer matched with the stirrer base is arranged in the stirrer, and a first feeding hopper and a second feeding hopper are arranged at the positions, above the stirrer, of a rack. Calcium oxide and attapulgite are arranged in the first feeding hopper and the second feeding hopper respectively, a water adding pipe, a first liquid adding pipe and a second liquid adding pipe are further arranged at the positions, above the stirrer, of the rack, the water adding pipe is used for adding pure water, and the first liquid adding pipe and the second liquid adding pipe are used for adding hydrochloric acid and hydrogen peroxide. The calcium peroxide and attapulgite waste water treatment composite material prepared by the device disclosed by the utility model is combined with bivalent iron salt for use, so that a good waste water treatment effect is achieved, the use amount of the calcium peroxide and attapulgite waste water treatment composite material can be reduced, the price of the bivalent iron salt is relatively low, and the sewage treatment cost can be effectively reduced.

Description

Technical Field

[0001] This utility model relates to a device for preparing calcium peroxide and attapulgite composite materials for wastewater treatment, belonging to the field of wastewater purification technology. Background Technology

[0002] Eutrophication of surface waters has become one of the most serious water environment problems facing the world today. Phosphorus is a key nutrient element that causes eutrophication. Therefore, removing phosphorus from wastewater is crucial for the prevention and control of eutrophication. Methods for phosphorus removal from wastewater mainly include biological methods, chemical precipitation, crystallization, membrane separation, and adsorption. Among these, chemical precipitation is an effective method for removing phosphorus from wastewater. A key technical challenge in applying chemical precipitation to remove phosphorus from wastewater is selecting a suitable precipitant.

[0003] Calcium peroxide is considered a "solid form" of hydrogen peroxide and is regarded as one of the most versatile and safest solid inorganic peroxide compounds. Due to its oxidizing, bleaching, disinfecting, and deodorizing abilities, calcium peroxide is widely used in aquaculture, agriculture, and medicine. It reacts with water to produce hydrogen peroxide and calcium hydroxide, providing both an alkaline and strongly oxidizing environment. Therefore, calcium peroxide is widely used in wastewater treatment and soil remediation. However, the use of calcium peroxide in treating high-concentration phosphorus-containing wastewater still has certain limitations: 1) Calcium peroxide is relatively expensive, and its use alone to treat phosphorus-containing wastewater is not economically viable. 2) Calcium peroxide dissolves in water, resulting in a highly alkaline environment, which is detrimental to subsequent biological or advanced treatment.

[0004] Attapulgite, also known as palygorskite or palygorskite chalcedony, is a hydrous magnesium-aluminate silicate clay mineral with a chain-like layered structure. Its structure belongs to the 2:1 type clay mineral. In each 2:1 unit structural layer, the vertices of tetrahedral crystals are inverted at certain intervals, forming chain-like layers. Channels parallel to the chains are formed between the tetrahedral bands, filled with zeolite water and water of crystallization. Attapulgite is often used as an adsorbent in wastewater treatment.

[0005] To address the shortcomings of existing industrial calcium peroxide applications in wastewater treatment, a calcium peroxide-attapulgite composite material was prepared using calcium oxide, hydrogen peroxide, and attapulgite as raw materials. This material is expected to reduce the cost of calcium peroxide in wastewater treatment and effectively improve the problem of excessively high pH after treatment caused by calcium peroxide. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a device for preparing composite materials for the treatment of calcium peroxide and attapulgite wastewater, so as to solve the technical problems existing in the prior art.

[0007] The technical solution adopted by this utility model is as follows: a preparation device for calcium peroxide and attapulgite wastewater treatment composite materials, including a stirrer base placed on the ground, a stirrer placed on the upper end of the stirrer base, the upper end of the stirrer being open, a stir bar that cooperates with the stirrer base being placed inside the stirrer, a first feeding hopper and a second feeding hopper being arranged on the frame above the stirrer, the first feeding hopper and the second feeding hopper being respectively filled with calcium oxide and attapulgite, and a water supply pipe, a first liquid supply pipe and a second liquid supply pipe being arranged on the frame above the stirrer, the water supply pipe being used to add pure water, and the first liquid supply pipe and the second liquid supply pipe being used to add hydrochloric acid and hydrogen peroxide.

[0008] Preferably, the water inlet pipe, the first liquid inlet pipe, and the second liquid inlet pipe are respectively provided with a first valve, a second valve, and a third valve, and the lower end of the first feeding hopper and the lower end of the second feeding hopper are respectively provided with a fourth valve and a fifth valve.

[0009] Preferably, a flow meter is installed on the water inlet pipe, the first liquid inlet pipe, and the second liquid inlet pipe.

[0010] Preferably, the first valve, the second valve, and the third valve are automatic valves, and the fourth valve and the fifth valve are flap valves.

[0011] Preferably, a discharge valve is provided at the lower end of the side wall of the agitator.

[0012] The beneficial effects of this utility model are as follows: Compared with the prior art, this utility model provides a device for preparing calcium peroxide and attapulgite wastewater treatment composite materials. The calcium peroxide and attapulgite wastewater treatment composite materials prepared by this utility model are used in combination with ferrous salts, which has a good wastewater treatment effect and reduces the amount of calcium peroxide and attapulgite wastewater treatment composite materials used. The price of ferrous salts is relatively low, which can effectively reduce the cost of sewage treatment. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] The reference numerals in the accompanying drawings include: 1. Stirrer base; 2. Stirrer; 3. First feeding hopper; 4. First liquid feeding pipe; 5. First valve; 6. Second liquid feeding pipe; 7. Second valve; 8. Water feeding pipe; 9. Third valve; 10. Flow meter; 11. Second feeding hopper; 12. Fourth valve; 13. Fifth valve; 14. Discharge valve; 15. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0016] Example 1:

[0017] Equipment for preparing composite materials for wastewater treatment using calcium peroxide and attapulgite, such as Figure 1 As shown, the system includes a cylindrical mixer base 1 placed on the ground. A cylindrical mixer 2 is placed on top of the mixer base 1, with an opening at the top. Inside the mixer 2 is a stirring element 3 that mates with the mixer base 1. The mixer 2 is a 90-1 series model. A first feeding hopper 4 and a second feeding hopper 12 are respectively located on the upper left and upper right of the mixer 2 on the frame. The first feeding hopper 4 and the second feeding hopper 12 are respectively filled with calcium oxide powder and attapulgite powder. A fourth valve 13 is located at the lower end of the first feeding hopper 4 and the lower end of the second feeding hopper 12. Fifth valve 14; The frame is also equipped with a vertically downward-facing water inlet pipe 9, a first liquid inlet pipe 5, and a second liquid inlet pipe 7 located above the stirrer 2. The upper end of the water inlet pipe 9 is connected to a pure water storage tank, the upper end of the first liquid inlet pipe 5 is connected to a hydrochloric acid storage tank, and the upper end of the second liquid inlet pipe 7 is connected to a hydrogen peroxide storage tank. The water inlet pipe 9 is used to add pure water, and the first liquid inlet pipe 5 and the second liquid inlet pipe 7 are used to add hydrochloric acid and hydrogen peroxide. The water inlet pipe 9, the first liquid inlet pipe 5, and the second liquid inlet pipe 7 are respectively equipped with a first valve 6, a second valve 8, and a third valve 10. The water inlet pipe 9, the first liquid inlet pipe 5, and the second liquid inlet pipe 7 are respectively equipped with a flow meter 11.

[0018] In this embodiment, the first valve 6, the second valve 8, and the third valve 10 are automatic valves, and the fourth valve 13 and the fifth valve 14 are flap valves.

[0019] In this embodiment, a discharge valve 15 is provided at the lower end of the side wall of the agitator 2. The discharge valve 15 is an automatic valve, which facilitates the discharge of materials inside the agitator 2.

[0020] The steps for preparing calcium peroxide and attapulgite wastewater treatment composite materials using the apparatus for preparing such composite materials are as follows:

[0021] (1) Add a certain amount of pure water into the stirrer 2 through the water pipe 9, control the water flow through the flow meter 11 on the water pipe 9, turn on the stirrer 2 to stir, and dissolve a certain amount of calcium oxide powder in pure water through the first feeding hopper 4 and stir for 1 hour to obtain calcium hydroxide suspension. The calcium hydroxide content in the calcium hydroxide suspension is 300g / L.

[0022] (2) Using the second feeding hopper 12, add natural attapulgite powder to the suspension prepared in step (1) according to a solid-liquid ratio of 30 ml / g and stir for 0.5 h to obtain an intermediate reaction solution.

[0023] (3) Add 1:1 hydrochloric acid and 30% hydrogen peroxide to the suspension prepared in step (2) through the first liquid addition tube 5 and the second liquid addition tube 7 at a ratio of 0.02ml / ml and 0.6ml / ml respectively. After stirring and reacting for 2 hours, open the discharge valve 15 and discharge the solution from the stirrer 2 into the sedimentation tank (existing) for standing.

[0024] Finally, the precipitate obtained in step (3) is filtered and dried in an oven (existing) at 70°C for 3 hours to obtain a calcium peroxide and attapulgite composite material.

[0025] When using calcium oxide and attapulgite composite materials, add calcium peroxide and attapulgite composite materials at a dosage of 0.25 g / L to phosphorus-containing wastewater, and simultaneously add ferrous salts to make the ferrous ion concentration 2 mmol / L. After stirring and reacting fully, let it stand to precipitate. After experimental analysis, the supernatant can be discharged into a comprehensive wastewater treatment plant for biological treatment to meet discharge standards.

[0026] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A device for preparing a composite material of calcium peroxide and attapulgite for wastewater treatment, characterized in that it comprises: The device comprises a stirrer base placed on the ground, an upper end of the stirrer base is placed with a stirrer, an upper end of the stirrer is opened, an inside of the stirrer is placed with a stirrer sub cooperating with the stirrer base, a first feeding hopper and a second feeding hopper are arranged on the frame above the stirrer, the first feeding hopper and the second feeding hopper are respectively filled with calcium oxide and attapulgite, a water feeding pipe, a first liquid feeding pipe and a second liquid feeding pipe are arranged on the frame above the stirrer, the water feeding pipe is used for adding pure water, the first liquid feeding pipe and the second liquid feeding pipe are used for adding hydrochloric acid and hydrogen peroxide.

2. The device for preparing calcium peroxide, attapulgite wastewater treatment composite material according to claim 1, characterized in that: First, second and third valves are respectively arranged on the water feeding pipe, the first liquid feeding pipe and the second liquid feeding pipe, and fourth and fifth valves are respectively arranged at lower ends of the first feeding hopper and the second feeding hopper.

3. The device for preparing calcium peroxide, attapulgite wastewater treatment composite material according to claim 2, characterized in that: Flow meters are respectively arranged on the water feeding pipe, the first liquid feeding pipe and the second liquid feeding pipe.

4. The device for preparing calcium peroxide and attapulgite wastewater treatment composite material according to claim 2, wherein the first, second and third valves are automatic valves, and the fourth and fifth valves are flap valves.

5. The device for preparing calcium peroxide, attapulgite wastewater treatment composite material according to claim 1, characterized in that: A discharge valve is arranged at a lower end of a side wall of the stirrer.

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