Wastewater treatment device for preparation of regenerated polypropylene flame retardant

Abstract

The utility model relates to the field of regenerated polypropylene flame retardant preparation, and discloses a wastewater treatment device for regenerated polypropylene flame retardant preparation, which comprises a raw water tank, an output port of the raw water tank is connected with a water inlet pipe, a treatment pond is arranged at the bottom end of the water inlet pipe, and a plurality of groups of shunt pipes are assembled between the water inlet pipe and the treatment pond. A plurality of groups of inclined manholes are formed in the inner wall of the treatment tank, and a filter grating is assembled in each group of manholes. According to the wastewater treatment device for preparing the regenerated polypropylene flame retardant, the filter grating is arranged, so that the filter grating can be quickly assembled and disassembled during cleaning or replacement, powdery flame retardant residues, particulate chemical additives or flaky high-molecular polymers entrained in wastewater for preparing the regenerated polypropylene flame retardant can be effectively intercepted, particulate matter blockage is avoided, and the treatment effect is good. And not only can shunting and intercepting of physical impurities be realized, but also the maintenance convenience is improved, and the problems that the grating is too large in size, difficult to disassemble, frequent to block and tedious to clean are solved.

Description

Technical Field

[0001] This utility model relates to the field of recycled polypropylene flame retardant preparation technology, specifically a wastewater treatment device for the preparation of recycled polypropylene flame retardants. Background Technology

[0002] The preparation of recycled polypropylene flame retardants usually involves multiple process steps such as adding flame retardants, mixing, modifying, and granulating. Various organic or inorganic flame retardant additives are used in the preparation process, and wastewater discharged directly without effective pretreatment will pollute the external environment.

[0003] Current wastewater treatment devices for recycled polypropylene flame retardant preparation often use large-volume integrated gratings for front-end impurity interception. These gratings are typically bulky, non-removable, and difficult to divert and intercept impurities. They are prone to clogging when encountering complex impurities such as powdered flame retardant residues or adhesive polymer particles, and are difficult to clean. Therefore, a wastewater treatment device for recycled polypropylene flame retardant preparation is needed to overcome these technical shortcomings. Utility Model Content

[0004] The purpose of this invention is to provide a wastewater treatment device for the preparation of recycled polypropylene flame retardant, so as to solve the problems mentioned in the background art, such as the excessively large and non-removable size of the screen, frequent clogging, and cumbersome cleaning.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a wastewater treatment device for the preparation of recycled polypropylene flame retardant, comprising a raw water tank, an inlet pipe connected to the outlet of the raw water tank, a treatment pool at the bottom of the inlet pipe, multiple diversion pipes connected between the inlet pipe and the treatment pool, multiple sets of inclined inspection holes opened on the inner wall of the treatment pool, a filter grid installed in each set of inspection holes, the filter grid including a set of fixing frames with the inclination direction opposite to that of the inspection holes, slots opened in the fixing frames, interception filter plates inserted into the slots, two sets of locking blocks processed on the bottom edge of the interception filter plates, corresponding slots processed on the inner wall of the filter grid, a spring installed at the bottom of the filter grid, and the bottom of the interception filter plate abutting against the spring after being fitted into place.

[0006] As a further technical solution of this utility model, five sets of filter grids are arranged in the treatment pool, and the filter grids are distributed in parallel with equal spacing.

[0007] As a further technical solution of this utility model, the bottom of the treatment tank is provided with multiple sets of connecting ports, and the bottom of the treatment tank is connected to the regulating tank through the connecting ports. A waste discharge pipe is installed at the bottom of the regulating tank.

[0008] As a further technical solution of this utility model, an acid storage tank and an alkali storage tank are provided on the left side of the regulating tank. The output ends of the acid storage tank and the alkali storage tank are connected to the dispensing box. A stirring motor is fixedly connected to the left side of the outer wall of the dispensing box. A stirring blade is fixedly connected to the output shaft of the stirring motor. The stirring blade is located at the lower third of the dispensing box.

[0009] As a further technical solution of this utility model, the connecting pipelines between the dispensing box and the acid storage tank, alkali storage tank, and regulating tank are all equipped with dosing pumps.

[0010] As a further technical solution of this utility model, three sets of geared motors are fixedly connected to the rear of the outer wall of the regulating pool, and the output shaft of the geared motors is fixedly connected to an impeller. The three sets of impellers are installed at equal intervals on the inner wall of the regulating pool.

[0011] As a further technical solution of this utility model, a pH sensing probe is fixedly connected to the right side of the outer wall of the regulating tank, and a pH regulating controller is fixedly connected to the right side of the outer wall of the treatment tank.

[0012] As a further technical solution of this utility model, the acid storage tank stores hydrochloric acid solution, and the alkali storage tank stores sodium hydroxide solution.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the wastewater treatment device prepared by the recycled polypropylene flame retardant not only achieves the diversion and interception of physical impurities, but also improves the convenience of maintenance, realizes online pH adjustment, and achieves high efficiency of automated operation.

[0014] (1) By setting up a filter grid, the filter grid is assembled using a snap-fit ​​and spring-loaded structure, which can be quickly installed and removed during cleaning or replacement. It can effectively intercept powdered flame retardant residues, particulate chemical additives or flake polymers carried in the wastewater from the preparation of recycled polypropylene flame retardant, avoiding particulate matter blockage. It can not only achieve the diversion and interception of physical impurities, but also improve the convenience of maintenance. It solves the problems of traditional grids being too large to be easily removed, frequently blocked, and cumbersome to clean.

[0015] (2) By setting up a pH sensor probe, pH control controller, dosing pump, acid storage tank and alkali storage tank, the pH sensor probe collects the acid and alkalinity values ​​of the wastewater in the adjustment tank and transmits the real-time pH value signal to the pH control controller. The pH is then precisely mixed and injected into the dispensing box according to the required ratio to achieve dynamic pH adjustment, maintain the system pH stable within the set range, and ensure that the wastewater meets the discharge standards.

[0016] (3) By setting up a dosing pump, a dispensing box, a stirring motor, and stirring blades, the dosing pump precisely controls the amount of liquid extracted each time through an electronic control method. Hydrochloric acid and sodium hydroxide can be pre-mixed evenly in the dispensing box. The dispensing box is equipped with stirring blades driven by a stirring motor for low-speed stirring. There is no need for manual dosing, which improves the automation efficiency of the operation. Attached Figure Description

[0017] Figure 1 This is a frontal cross-sectional view of the present invention.

[0018] Figure 2 This is a top view of the filter grid structure of this utility model;

[0019] Figure 3 This is a front view cross-sectional structural diagram of the dispensing box of this utility model;

[0020] Figure 4 This is a rear view schematic diagram of the regulating tank structure of this utility model.

[0021] In the diagram: 1. Treatment tank; 2. Inlet pipe; 3. Diversion pipe; 4. Raw water tank; 5. Inspection hole; 6. Filter screen; 7. Acid storage tank; 8. Alkali storage tank; 9. Agitator motor; 10. Dispensing box; 11. Agitator blades; 12. Dosing pump; 13. Impeller; 14. Equalization tank; 15. Waste discharge pipe; 16. pH sensor probe; 17. Connecting port; 18. pH adjustment controller; 19. Filter plate; 20. Fixing frame; 21. Slot; 22. Block; 23. Spring; 24. Slot; 25. Gear-driven motor. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4The present invention provides an embodiment of a wastewater treatment device for the preparation of recycled polypropylene flame retardant, comprising a raw water tank 4, an inlet pipe 2 connected to the outlet of the raw water tank 4, a treatment tank 1 at the bottom of the inlet pipe 2, multiple diversion pipes 3 between the inlet pipe 2 and the treatment tank 1, multiple sets of inclined inspection holes 5 on the inner wall of the treatment tank 1, each set of inspection holes 5 being fitted with a filter grid 6, the filter grid 6 including a set of fixing brackets 20 with the inclination direction opposite to that of the inspection hole 5, a slot 24 in the fixing bracket 20, an intercepting filter plate 19 inserted into the slot 24, two sets of locking blocks 22 processed on the bottom edge of the intercepting filter plate 19, a corresponding slot 21 processed on the inner wall of the filter grid 6, a spring 23 installed at the bottom of the filter grid 6, the bottom of the intercepting filter plate 19 abutting against the spring 23 after being fitted into place, a total of five sets of filter grids 6 are arranged in the treatment tank 1, the filter grids 6 are evenly spaced and parallel;

[0024] Specifically, such as Figure 1 and Figure 2 As shown, the filter grid 6 has a slot 24 inside, into which the intercepting filter plate 19 is inserted. The slot 21 and spring 23 facilitate positioning and, together with the spring 23, form a snap-fit ​​and spring-loaded structure, which can be quickly installed and removed during cleaning or replacement. The intercepting filter plate 19 is fixedly installed inside the filter grid 6 by embedding.

[0025] Three sets of geared motors 25 are fixedly connected to the rear of the outer wall of the equalization tank 14. The output shaft of the geared motors 25 is fixedly connected to impellers 13. The three sets of impellers 13 are installed at equal intervals on the inner wall of the equalization tank 14. A pH sensor probe 16 is fixedly connected to the right side of the outer wall of the equalization tank 14. A pH controller 18 is fixedly connected to the right side of the outer wall of the treatment tank 1. Hydrochloric acid solution is stored in the acid storage tank 7, and sodium hydroxide solution is stored in the alkali storage tank 8.

[0026] Specifically, such as Figure 1 , Figure 3 and Figure 4 As shown, the pH sensor probe 16 collects the acid and alkalinity values ​​of the wastewater in the equalization tank 14 and transmits the real-time pH value signal to the pH equalization controller 18. The pH equalization controller 18 controls the module to calculate the difference between the target pH range and the current detection value, and drives the dosing pump 12 to extract hydrochloric acid and sodium hydroxide solutions from the acid storage tank 7 and the alkali storage tank 8 respectively. The solutions are then precisely mixed according to the required ratio and injected into the dispensing box 10. After the acid and alkali are evenly mixed, they flow into the equalization tank 14.

[0027] Multiple sets of connecting ports 17 are opened at the bottom of the treatment tank 1. The bottom of the treatment tank 1 is connected to the regulating tank 14 through the connecting ports 17. A waste discharge pipe 15 is installed at the bottom of the regulating tank 14. An acid storage tank 7 and an alkali storage tank 8 are set on the left side of the regulating tank 14. The output ends of the acid storage tank 7 and the alkali storage tank 8 are connected to the dispensing box 10. A stirring motor 9 is fixedly connected to the left side of the outer wall of the dispensing box 10. A stirring blade 11 is fixedly connected to the output shaft of the stirring motor 9. The stirring blade 11 is located at the lower third of the dispensing box 10. A dosing pump 12 is installed in the connecting pipes of the dispensing box 10 to the acid storage tank 7, the alkali storage tank 8 and the regulating tank 14.

[0028] Specifically, such as Figure 1 and Figure 3 As shown, the dosing pump 12 precisely controls the amount of liquid extracted each time through electronic control. Hydrochloric acid and sodium hydroxide can be pre-mixed evenly in the dispensing tank 10. The dispensing tank 10 is equipped with a stirring blade 11 driven by a stirring motor 9 for low-speed stirring.

[0029] Working Principle: Wastewater generated during the preparation of recycled polypropylene flame retardant is first collected in raw water tank 4. The outlet of raw water tank 4 is connected to inlet pipe 2, and multi-component diversion pipe 3 evenly distributes the raw water. The wastewater enters the treatment tank 1. Inspection holes 5 are obliquely opened on the inner wall of the treatment tank 1. Each set of inspection holes 5 is equipped with a filter grid 6, which can intercept large particulate impurities and recycled raw material fragments in the wastewater, preventing them from entering the downstream and causing blockage or interfering with the chemical reaction. After the particulate matter is intercepted, the wastewater enters the equalization tank 14 from the treatment tank 1. Acid storage tank 7 and alkali storage tank 8 are connected to the dispensing tank 10 through dosing pump 12. Dosing pump 12 accurately extracts the required solution and injects it into the dispensing tank 10. The dispensing tank 10 is equipped with a stirrer driven by stirring motor 9. The impeller 11 continuously stirs the liquid to ensure that different types of conditioning solutions are fully and evenly mixed. The mixed conditioning solution is then injected into the conditioning tank 14 through the dosing pump 12. Three sets of impellers 13 are fixedly connected to the inner wall of the conditioning tank 14. The impellers 13 are driven by three sets of geared motors 25 and are evenly distributed on the inner wall. When the impellers 13 rotate, they agitate the wastewater in the conditioning tank 14, further improving the mixing efficiency of acid and alkali solutions with wastewater. A pH sensor probe 16 is installed behind the outer wall of the conditioning tank 14 to detect the pH value inside the conditioning tank 14 in real time and transmit the signal to the pH range installed on the outer wall of the treatment tank 1 to control the opening frequency and dosing flow rate of the dosing pump 12, thereby realizing the automatic adjustment of the acidity and alkalinity of the wastewater. Finally, the wastewater adjusted by the conditioning tank 14 can be discharged through the waste discharge pipe 15.

[0030] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A wastewater treatment device for regenerating a polypropylene flame retardant preparation, comprising a raw water tank (4), characterized in that: The raw water tank (4) output is connected with the water inlet pipe (2), the bottom end of the water inlet pipe (2) is provided with a treatment tank (1), a plurality of component diversion pipes (3) are assembled between the water inlet pipe (2) and the treatment tank (1), a plurality of inclined manholes (5) are opened in the inner wall of the treatment tank (1), and a filter grid (6) is assembled in each group of manholes (5). The filter grid (6) includes a group of fixed frames (20) opposite to the inclined direction of the manhole (5), the fixed frame (20) is provided with a slot (24), the slot (24) is inserted with an intercepting filter plate (19), two groups of clamping blocks (22) are processed at the bottom edge of the intercepting filter plate (19), a clamping groove (21) is processed at the corresponding position of the inner wall of the filter grid (6), a spring (23) is installed at the inner bottom of the filter grid (6), and the bottom of the intercepting filter plate (19) is abutted with the spring (23) after being embedded in place.

2. A wastewater treatment device prepared from recycled polypropylene flame retardant according to claim 1, characterized by: Five groups of filter grids (6) are arranged in the treatment tank (1), and the filter grids (6) are distributed in parallel at equal intervals.

3. A wastewater treatment device prepared from recycled polypropylene flame retardant according to claim 1, characterized by: A plurality of communication openings (17) are opened in the inner bottom of the treatment tank (1), and the bottom of the treatment tank (1) is communicated with an adjusting tank (14) through the communication opening (17).

4. A wastewater treatment device prepared from recycled polypropylene flame retardant according to claim 3, characterized by: An acid liquid storage tank (7) and an alkali liquid storage tank (8) are arranged on the left side of the adjusting tank (14), the output ends of the acid liquid storage tank (7) and the alkali liquid storage tank (8) are connected to a distribution box (10), a stirring motor (9) is fixedly connected to the left outer wall of the distribution box (10), a stirring blade (11) is fixedly connected to the output shaft of the stirring motor (9), and the stirring blade (11) is located at one third below the inside of the distribution box (10).

5. A wastewater treatment device prepared from recycled polypropylene flame retardant according to claim 4, characterized by: The connecting pipelines of the distribution box (10), the acid liquid storage tank (7), the alkali liquid storage tank (8) and the adjusting tank (14) are all provided with dosing pumps (12).

6. A wastewater treatment device prepared from recycled polypropylene flame retardant according to claim 4, characterized by: Three groups of gear variable speed motors (25) are fixedly connected to the rear outer wall of the adjusting tank (14), the output shafts of the gear variable speed motors (25) are fixedly connected with impellers (13), and the three groups of impellers (13) are installed at equal intervals on the inner wall of the adjusting tank (14).

7. A wastewater treatment device prepared from recycled polypropylene flame retardant according to claim 4, characterized by: A pH sensing probe (16) is fixedly connected to the right outer wall of the adjusting tank (14), and a pH adjusting controller (18) is fixedly connected to the right outer wall of the treatment tank (1).

8. A wastewater treatment device prepared from recycled polypropylene flame retardant according to claim 4, characterized by: Hydrochloric acid solution is stored in the acid liquid storage tank (7), and sodium hydroxide solution is stored in the alkali liquid storage tank (8).

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