Filter pressing gypsum wastewater circulating device

Abstract

The utility model relates to the technical field of circulating devices, and discloses a filter pressing gypsum wastewater circulating device which comprises a reaction tank, a bearing plate and a storage box, the bearing plate is fixedly connected to the top of one end of the reaction tank, and the storage box is provided with a flocculation bin and a scale inhibitor bin in a penetrating mode from the top. The top of the storage box is connected with a plurality of magnetic suction flip covers through hinges, and the plurality of magnetic suction flip covers are connected to the top of the flocculation bin and the top of the scale inhibitor bin through magnetic suction. And the rotor rotates to quantitatively add the medicament into the reaction tank from the bottom of the bin through the blanking pipe and the blanking port. The feeding amount of the rotary feeder is controlled by adjusting the rotating speed, uniform conveying of chemicals is guaranteed through gaps between blades and pipe grooves of the rotary feeder, a discharging channel can be cut off at any time through cooperation of a magnetic suction gate and a hydraulic rod, excessive feeding is avoided, and the feeding amount of the chemicals can be accurately adjusted by controlling the rotating speed of the rotary feeder.

Description

Technical Field

[0001] This utility model relates to the field of recycling devices, and in particular to a wastewater recycling device for filter press gypsum. Background Technology

[0002] The gypsum filter press wastewater recycling system mainly consists of a wastewater collection tank, a pretreatment unit, a filter press system, a purification unit, a clear water storage tank, and pipelines and a control system. This system is used to treat gypsum wastewater, achieving solid-liquid separation and water resource recycling. Its working principle typically involves applying pressure to the gypsum wastewater using equipment such as a plate and frame filter press, forcing the wastewater through a filter cloth. Solid impurities are trapped on the filter cloth, forming a filter cake, thus achieving solid-liquid separation. The separated clear water can then enter the recycling system for replenishment during production or other processes with low water quality requirements, achieving water conservation and reducing wastewater discharge.

[0003] Existing flocculants and scale inhibitors for gypsum wastewater are all added manually or by simple volumetric metering. This method introduces a certain degree of error, making it impossible to adjust the added agent to match the wastewater flow rate. This can easily lead to excessive flocculant forming colloidal encapsulation or insufficient scale inhibitor causing scaling on the equipment. Furthermore, when relying solely on a single scale inhibitor, scale easily forms on the inner walls of the wastewater tank and pipes. At the same time, the turbine agitator speed decreases due to scaling, and the filter plates of the plate and frame filter press need to be cleaned frequently, which is time-consuming and labor-intensive. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a wastewater recycling device for filter press gypsum.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A filter press gypsum wastewater recycling device includes a reaction tank, a receiving plate, and a storage tank. The receiving plate is fixedly connected to the top of one end of the reaction tank. The storage tank has a flocculation chamber and a scale inhibitor chamber extending through from the top. The top of the storage tank is connected to several magnetic flip covers via hinges. These magnetic flip covers are magnetically connected to the top of the flocculation chamber and the scale inhibitor chamber. The top of the receiving plate is provided with several discharge pipes. The top ends of these discharge pipes are fixedly connected to the bottom of the storage tank and respectively connect to the flocculation chamber and the scale inhibitor chamber. The bottom ends of the discharge pipes are integrally connected to the top of the receiving plate. A rotary feeder A is fixedly installed inside the discharge pipe at the bottom of the flocculation chamber, and a rotary feeder B is fixedly installed inside the discharge pipe at the bottom of the scale inhibitor chamber. The top of the receiving plate has several discharge ports extending through. The flocculation chamber and the scale inhibitor chamber are connected to the discharge ports via the discharge pipes. The grooves of the discharge pipes are opened and closed by the rotary feeders A and B.

[0007] As a further embodiment of this utility model, a plurality of gate slots are provided through one side of the receiving plate, and the plurality of gate slots are connected to a plurality of discharge ports. The bottom of the rotary feeder A and the rotary feeder B are both provided with magnetic suction gates, which are slidably connected in the gate slots. Hydraulic rods are provided on both sides of the discharge ports, and the hydraulic rods are fixedly connected inside the receiving plate.

[0008] As a further embodiment of this utility model, the telescopic ends of several hydraulic rods are respectively fixedly connected to both ends of one side of the magnetic gate. The discharge port and the magnetic gate are both located at the top of the reaction tank. Several turbine stirrers are fixedly installed on one side of the reaction tank. The bottom of the reaction tank is sloping. A water pump is provided at the end of the reaction tank away from the receiving plate.

[0009] As a further embodiment of this utility model, a drain pipe is connected through to one side of the lowest point of the reaction tank. One end of the drain pipe is fixedly connected to the suction pipe of the water pump by bolts. An electromagnetic scale inhibitor is fixedly connected to the outlet pipe of the water pump by bolts. The other end of the electromagnetic scale inhibitor is fixedly connected to the bottom of the water delivery pipe by bolts.

[0010] As a further embodiment of this utility model, a side water pipe is integrally connected to one side of the water supply pipe, a plate and frame filter press is provided on one side of the water supply pipe, an inlet pipe is integrally connected to one end of the plate and frame filter press, and the end of the water supply pipe away from the electromagnetic scale inhibitor is fixedly connected to the outside of the inlet pipe.

[0011] As a further embodiment of this utility model, a solenoid valve is fixedly installed on the outside of one end of the water supply pipe near the inlet pipe and the side water pipe. The water supply pipe and the storage tank are distributed at both ends of the reaction tank. A base is integrally connected to the bottom of one side of the reaction tank. The plate and frame filter press is installed on the top of the base. The water outlet of the plate and frame filter press is located at the opening at the top of the reaction tank.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. Before the gypsum wastewater from the first filter press enters the reaction tank, rotary feeders A and B are started. The rotating rotors quantitatively add the reagent from the bottom of the silo through the feed pipe and feed port into the reaction tank. The rotary feeders control the dosage by adjusting the rotation speed. The gap between the blades and the tube groove ensures uniform delivery of the reagent. The magnetic gate and hydraulic rod can cut off the feed channel at any time to avoid over-dosing. By controlling the rotation speed of the rotary feeders, the dosage of reagent can be precisely adjusted. When the rotary feeders are closed, the flow of reagent in the tube groove is blocked to prevent leakage. Precise dosing reduces reagent waste and lowers operating costs. At the same time, the appropriate reagent concentration improves the flocculation and scale inhibition effect, creating conditions for the efficient operation of the subsequent plate and frame filter press.

[0014] 2. After the water pump starts, the wastewater that has undergone preliminary sedimentation treatment in the reaction tank is drawn out from the lowest point of the tank and transported to the electromagnetic scale inhibitor through the drain pipe. The electromagnetic scale inhibitor uses an alternating magnetic field to change the crystal structure of calcium, magnesium and other ions in the wastewater, preventing them from forming hard scale. After the electromagnetic scale inhibition treatment, the wastewater is transported to the subsequent treatment equipment through the water supply pipe. The water supply pipe sends the wastewater into the plate and frame filter press. Under the normal pressure value (0.8MPa pressure), the flocculated gypsum particles are intercepted by the filter cloth to form a filter cake. The clear liquid flows back to the reaction tank through the outlet tap. When the effluent turbidity is >5NTU, the solenoid valve switches to allow the wastewater to flow back to the reaction tank through the side water pipe. After mixing with the newly flowing primary filter press wastewater, the reagent is added again for treatment, forming a "flocculation-filtration-recirculation" closed loop. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of a filter press gypsum wastewater recycling device proposed in this utility model;

[0016] Figure 2 This is a schematic diagram of the reaction tank of a filter press gypsum wastewater recycling device proposed in this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the receiving plate of the filter press gypsum wastewater recycling device proposed in this utility model;

[0018] Figure 4 This is a schematic diagram of the storage tank of a filter press gypsum wastewater recycling device proposed in this utility model;

[0019] Figure 5 This is a schematic diagram of the water supply pipe of a filter press gypsum wastewater recycling device proposed in this utility model.

[0020] In the diagram: 1. Reaction tank; 101. Drainage pipe; 102. Base; 2. Receiving plate; 201. Feed port; 202. Gate slot; 203. Magnetic gate; 204. Hydraulic rod; 3. Storage tank; 301. Flocculation chamber; 302. Scale inhibitor chamber; 303. Magnetic flip cover; 304. Feed pipe; 305. Rotary feeder A; 306. Rotary feeder B; 4. Turbine agitator; 5. Water pump; 6. Electromagnetic scale inhibitor; 7. Water supply pipe; 701. Side water pipe; 702. Solenoid valve; 8. Plate and frame filter press; 801. Water inlet pipe. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] Reference Figures 1-5A wastewater recycling device for filter press gypsum includes a reaction tank 1, a receiving plate 2, and a storage tank 3. The receiving plate 2 is fixedly connected to the top of one end of the reaction tank 1. The storage tank 3 has a flocculation chamber 301 and a scale inhibitor chamber 302 extending through the top. Several magnetic flip covers 303 are connected to the top of the storage tank 3 via hinges. The magnetic flip covers 303 are magnetically connected to the top of the flocculation chamber 301 and the scale inhibitor chamber 302. Several discharge pipes 304 are provided on the top of the receiving plate 2. The top ends of the discharge pipes 304 are fixedly connected to the bottom of the storage tank 3 and are respectively connected to the flocculation chamber 301 and the scale inhibitor chamber 302. The scale inhibitor silo 302 and the feed pipe 304 are integrally connected to the top of the receiving plate 2 at the bottom. A rotary feeder A305 is fixedly installed inside the feed pipe 304 at the bottom of the flocculation silo 301, and a rotary feeder B306 is fixedly installed inside the feed pipe 304 at the bottom of the scale inhibitor silo 302. Several feed ports 201 are opened through the top of the receiving plate 2. Both the flocculation silo 301 and the scale inhibitor silo 302 are connected to several feed ports 201 through several feed pipes 304. The grooves of the several feed pipes 304 are opened and closed by the rotary feeders A305 and B306 respectively.

[0025] In use, the flocculant 301 and scale inhibitor 302 in storage tank 3 store flocculant and scale inhibitor respectively. The magnetic flip cover 303 is magnetically attached to the top of the tank body to seal it and prevent the agents from getting damp or evaporating. The flocculant 301 and scale inhibitor 302 in storage tank 3 store flocculant (such as PAM) and scale inhibitor (such as HEDP) respectively. The magnetic flip cover 303 magnetically seals the tank body. Before the gypsum wastewater after the first filter press enters the reaction tank 1, the rotary feeder A305 and rotary feeder B306 are started. The rotor rotates and quantitatively adds the agents from the bottom of the tank to the reaction tank 1 through the discharge pipe 304 and the discharge port 201. The rotary feeder controls the dosage by adjusting its rotation speed. The gap between its blades and the tube ensures uniform delivery of the reagent. The magnetic gate 203, in conjunction with the hydraulic rod 204, can cut off the feeding channel at any time to avoid over-dosing. By controlling the rotation speed of the rotary feeder, the dosage of the reagent can be precisely adjusted. When the rotary feeder is closed, it can block the flow of the reagent in the tube to prevent leakage. The automated and precise quantitative dosing of the reagent ensures that the wastewater is fully and appropriately pretreated in the reaction tank 1. Precise dosing reduces reagent waste and lowers operating costs. At the same time, the appropriate reagent concentration improves the flocculation and scale inhibition effects, creating conditions for the efficient operation of the subsequent plate and frame filter press 8.

[0026] In this embodiment, a plurality of gate slots 202 are provided through one side of the receiving plate 2, and the plurality of gate slots 202 are connected to a plurality of discharge ports 201. The bottom of the rotary feeder A305 and the rotary feeder B306 are provided with magnetic gates 203, which are slidably connected in the gate slots 202. Hydraulic rods 204 are provided on both sides of the discharge ports 201, and the hydraulic rods 204 are fixedly connected inside the receiving plate 2.

[0027] In use, when the hydraulic rod 204 extends, it pushes the magnetic gate 203 to slide to one side within the gate slot 202, closing the discharge port 201 and preventing the reagent from falling. When the hydraulic rod 204 retracts, the magnetic gate 203 slides open, the discharge port 201 opens, and the reagent is allowed to pass through. The magnetic attraction between the magnetic gate 203 and the gate slot 202 ensures the sealing in the closed state, preventing reagent leakage, and at the same time preventing moisture inside the reaction tank 1 from entering the storage tank 3 and contaminating the reagent.

[0028] In this embodiment, the telescopic ends of several hydraulic rods 204 are respectively fixedly connected to both ends of one side of the magnetic gate 203. The discharge port 201 and the magnetic gate 203 are both located at the top of the reaction tank 1. Several turbine agitators 4 are fixedly installed on one side of the reaction tank 1. The bottom of the reaction tank 1 is sloping. A water pump 5 is provided at the end of the reaction tank 1 away from the receiving plate 2.

[0029] During use, after the reagent enters the reaction tank 1 through the feed port 201, the turbine agitator 4 starts working and agitates the wastewater at a certain speed to ensure that the reagent and wastewater are fully mixed and reacted. The bottom of the reaction tank 1 is designed with a slope. As the agitation and reaction proceed, the flocculated gypsum flocs and other solid particles settle down along the slope to the lowest point of the bottom of the reaction tank 1 under the action of gravity. The turbine agitator 4 enhances the mixing effect of the reagent and wastewater, making the reaction more complete, improving the flocculation efficiency, and shortening the reaction time. The clear liquid that has undergone preliminary treatment gradually collects at the end of the reaction tank 1 away from the receiving plate 2, making it easy for the water pump 5 to extract it.

[0030] In this embodiment, a drain pipe 101 is connected through the lowest point of the bottom of the reaction tank 1. One end of the drain pipe 101 is fixedly connected to the suction pipe of the water pump 5 by bolts. The outlet pipe of the water pump 5 is fixedly connected to the electromagnetic scale inhibitor 6 by bolts. The other end of the electromagnetic scale inhibitor 6 is fixedly connected to the bottom of the water supply pipe 7 by bolts.

[0031] When in use, after the water pump 5 is started, the wastewater that has undergone preliminary sedimentation treatment in the reaction tank 1 is drawn out from the lowest point of the tank bottom and transported to the electromagnetic scale inhibitor 6 through the drain pipe 101. The electromagnetic scale inhibitor 6 uses an alternating magnetic field to change the crystal structure of calcium, magnesium and other ions in the wastewater, preventing them from forming hard scale. The wastewater after electromagnetic scale inhibition treatment is then transported to the subsequent treatment equipment through the water supply pipe 7, which greatly reduces the frequency of pipe blockage and equipment failure caused by scaling and lowers equipment maintenance costs.

[0032] In this embodiment, a side water pipe 701 is integrally connected to one side of the water supply pipe 7, and a plate and frame filter press 8 is provided on one side of the water supply pipe 7. An inlet pipe 801 is integrally connected to one end of the plate and frame filter press 8, and the end of the water supply pipe 7 away from the electromagnetic scale inhibitor is fixedly connected to the outside of the inlet pipe 801.

[0033] In use, the water supply pipe 7 transports the wastewater treated by electromagnetic scale inhibition to the plate and frame filter press 8. When the wastewater needs to be transported to the plate and frame filter press 8 for filtration, the solenoid valve 702 at one end of the inlet pipe 801 is opened and the solenoid valve 702 at the other end of the side water pipe 701 is closed. The plate and frame filter press 8 receives the wastewater through the inlet pipe 801. Under pressure, the wastewater passes through the filter cloth, and solid particles are trapped on the filter cloth to form a filter cake. The filtered clear liquid is discharged through the outlet tap. The plate and frame filter press 8 performs deep solid-liquid separation on the wastewater, further reducing the suspended solids content in the wastewater, thereby achieving circulating filtration, so that the treated wastewater reaches a higher water quality standard, and the clear liquid can be recycled, improving the water resource utilization rate.

[0034] In this embodiment, a solenoid valve 702 is fixedly installed on the outside of the water supply pipe 7 near the inlet pipe 801 and the side water pipe 701. The water supply pipe 7 and the storage tank 3 are distributed at both ends of the reaction tank 1. A base 102 is integrally connected to the bottom of one side of the reaction tank 1. The plate and frame filter press 8 is installed on the top of the base 102. The water outlet of the plate and frame filter press 8 is located at the top opening of the reaction tank 1.

[0035] During use, after the circulating filtration is completed, the solenoid valve 702 at one end of the water supply pipe 7 is closed, while the solenoid valve 702 at one end of the side water pipe 701 is opened. The outlet of the plate and frame filter press 8 returns the filtered clear liquid to the top opening of the reaction tank 1, and then pumps it into the side water pipe 701 through the water pump 5. The gypsum wastewater is then transported to the next process for purification through the side water pipe 701, forming a cycle. The precise control of the solenoid valve 702 realizes the automatic switching of the wastewater treatment process. The wastewater flow direction can be adjusted in real time according to the water quality monitoring data to ensure the optimal treatment effect and improve the treatment efficiency.

[0036] From the above description, it can be seen that the above embodiments of this utility model achieve the following technical effects: the flocculation chamber 301 and the scale inhibitor chamber 302 of the storage tank 3 respectively store PAM flocculant and HEDP scale inhibitor, and the magnetic flip cover 303 is sealed and moisture-proof. Before the gypsum wastewater after the first pressure filtration enters the reaction tank 1, the rotary feeder A305 and rotary feeder B306 are started. By adjusting the speed, the dosage of the agent is precisely controlled, and the agent is sent into the reaction tank 1 through the discharge pipe 304 and the discharge port 201. At the same time, the magnetic gate 203 and the hydraulic rod 204 cooperate to cut off the discharge channel at any time to avoid over-addition. After the agent enters the reaction tank 1, the turbine agitator 4 stirs at a certain speed to make the agent and wastewater fully mix and react, and promote the flocculation of gypsum particles into agglomerates. The bottom of reaction tank 1 is sloping. Flocculated solid particles settle to the lowest point of the tank under gravity. The pre-treated clear liquid from the upper layer collects at the other end of reaction tank 1 for easy extraction by water pump 5. The pump extracts the pre-treated wastewater from reaction tank 1 and sends it to electromagnetic scale inhibitor 6. Electromagnetic scale inhibitor 6 uses an alternating magnetic field to change the crystal structure of calcium and magnesium ions in the wastewater, preventing the formation of hard scale. The scale-treated wastewater is then transported to subsequent equipment via water pipe 7. Wastewater is transported to plate and frame filter press 8. By controlling solenoid valve 702, the wastewater enters the filter press through inlet pipe 801. Under pressure, the wastewater passes through the filter cloth, and solid particles form a filter cake. The clear liquid is discharged through the outlet tap. After the circulating filtration is completed, the clear liquid flows back to reaction tank 1 and is then pumped by water pump 5 to side water pipe 701 for the next purification process. This process is repeated to form a cycle. Solenoid valve 702 adjusts the wastewater flow direction in real time according to water quality data to ensure optimal treatment effect.

[0037] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A wastewater recycling device for filter press gypsum, comprising a reaction tank (1), a receiving plate (2), and a storage tank (3), characterized in that, The receiving plate (2) is fixedly connected to the top of one end of the reaction tank (1). The storage tank (3) has a flocculation chamber (301) and a scale inhibitor chamber (302) extending through from the top. The top of the storage tank (3) is connected by a number of magnetic flip covers (303) via hinges. The magnetic flip covers (303) are magnetically connected to the top of the flocculation chamber (301) and the scale inhibitor chamber (302). The top of the receiving plate (2) is provided with a number of discharge pipes (304). The top ends of the discharge pipes (304) are fixedly connected to the bottom of the storage tank (3) and respectively connect the flocculation chamber (301) and the scale inhibitor chamber (302). The bottom end is integrally connected to the top of the receiving plate (2). A rotary feeder A (305) is fixedly installed in the bottom discharge pipe (304) of the flocculation bin (301). A rotary feeder B (306) is fixedly installed in the bottom discharge pipe (304) of the scale inhibitor bin (302). A number of discharge ports (201) are opened through the top of the receiving plate (2). The flocculation bin (301) and the scale inhibitor bin (302) are connected to the discharge ports (201) through the discharge pipes (304). The grooves of the discharge pipes (304) are opened and closed by the rotary feeder A (305) and the rotary feeder B (306).

2. The filter press gypsum wastewater recycling device according to claim 1, characterized in that, The receiving plate (2) has several gate slots (202) through one side, and the several gate slots (202) are connected to several discharge ports (201). The bottom of the rotary feeder A (305) and the rotary feeder B (306) are provided with magnetic gates (203). The magnetic gates (203) are slidably connected in the gate slots (202). Hydraulic rods (204) are provided on both sides of the discharge ports (201). The hydraulic rods (204) are fixedly connected inside the receiving plate (2).

3. The wastewater recycling device for filter press gypsum according to claim 2, characterized in that, The telescopic ends of several hydraulic rods (204) are respectively fixedly connected to both ends of one side of the magnetic gate (203). The discharge port (201) and the magnetic gate (203) are both located at the top of the reaction tank (1). Several turbine agitators (4) are fixedly installed on one side of the reaction tank (1). The bottom of the reaction tank (1) is sloping. A water pump (5) is provided at one end of the reaction tank (1) away from the receiving plate (2).

4. The filter press gypsum wastewater recycling device according to claim 3, characterized in that, A drain pipe (101) is connected through the lowest point of the bottom of the reaction tank (1). One end of the drain pipe (101) is fixedly connected to the suction pipe of the water pump (5) by bolts. An electromagnetic scale inhibitor (6) is fixedly connected to the outlet pipe of the water pump (5) by bolts. The other end of the electromagnetic scale inhibitor (6) is fixedly connected to the bottom of the water supply pipe (7) by bolts.

5. The filter press gypsum wastewater recycling device according to claim 4, characterized in that, The water supply pipe (7) is integrally connected to a side water pipe (701) on one side, and a plate and frame filter press (8) is provided on one side of the water supply pipe (7). The plate and frame filter press (8) is integrally connected to an inlet pipe (801) at one end, and the end of the water supply pipe (7) away from the electromagnetic scale inhibitor is fixedly connected to the outside of the inlet pipe (801).

6. The filter press gypsum wastewater recycling device according to claim 5, characterized in that, Solenoid valves (702) are fixedly installed on the outside of the water supply pipe (7) near the inlet pipe (801) and the side water pipe (701). The water supply pipe (7) and the storage tank (3) are distributed at both ends of the reaction tank (1). A base (102) is integrally connected to the bottom of one side of the reaction tank (1). The plate and frame filter press (8) is installed on the top of the base (102). The water outlet of the plate and frame filter press (8) is located at the top opening of the reaction tank (1).

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