A cooling tower blowdown pre-purification device

Abstract

This utility model discloses a pre-purification device for wastewater discharge in cooling towers, including a mixing mechanism for mixing reagents and transmitting power. The top of the mixing mechanism is equipped with a transmission mechanism for providing kinetic energy and intermittently changing the output direction, and the bottom of the mixing mechanism is equipped with a filtration mechanism for opening and closing to filter impurities. In this utility model, multiple gears drive a single motor to complete the stirring and extrusion actions, completing the water purification steps from mixing the water purification agent to separating contaminants, saving costs while maintaining high efficiency. The rotating shaft is driven by an incomplete gear system, allowing the rotation direction to change intermittently, ensuring thorough mixing of the water purification agent and wastewater, while also facilitating the opening and closing of the screen. The unidirectional rotation of the motor output shaft allows the stirring paddle to perform periodic direction-changing stirring without frequent changes in output direction, reducing the motor load and extending the device's service life.

Description

Technical Field

[0001] This utility model relates to industrial circulating water treatment equipment, specifically a pre-purification device for wastewater discharged from cooling towers. Background Technology

[0002] Circulating cooling water systems are the largest water-using systems in thermal power plants, coal chemical plants, and chemical enterprises. Due to evaporation losses in the cooling tower, the salt content of the circulating cooling water is continuously concentrated. In addition, the scrubbing effect of the cooling tower dissolves a large amount of dust from the air into the circulating water. Therefore, the wastewater from the cooling tower has a higher content of pollutants and a higher salt content than the makeup water. The pollutants are mainly suspended solids and organic matter. Direct discharge will pollute the environment, while reuse requires deep treatment.

[0003] Comparing with Chinese Patent Publication No. CN221028038U, a cooling tower circulating water purification device is disclosed, including an inlet tank, a first purified water tank, a second purified water tank, and a storage tank. The first purified water tank is connected to the cooling tower spray water collection tray through the inlet tank. The second purified water tank is arranged side by side with a connecting port between them. The second purified water tank is connected to the storage tank through a second connecting pipe. The inlet tank is detachably equipped with a primary filter screen. The second connecting pipe is detachably equipped with a secondary filter screen. The bottoms of the first and second purified water tanks have inverted conical bottoms with drain ports. The storage tank is connected to the cooling tower spray pipe through an outlet pipe. Through two-stage sedimentation in the first and second purified water tanks and two-stage filtration through the inlet tank and connecting pipe, the cooling tower circulating water purification device can effectively purify the cooling tower spray circulating water, thereby extending the water replacement cycle. The cooling tower circulating water purification device can be used in conjunction with a water purification agent to further improve its purification capacity.

[0004] The disadvantages of the above patent are: during the sedimentation and sewage discharge process, the water flow rate cannot be too fast, resulting in long processing time and poor effect; the added water purification agent is difficult to mix fully with the sewage, and cannot meet the sanitary standards required for recycling. Utility Model Content

[0005] The purpose of this invention is to provide a pre-purification device for wastewater discharge in cooling towers to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A pre-purification device for wastewater discharge in a cooling tower includes a mixing mechanism for mixing reagents and transmitting power. The top of the mixing mechanism is equipped with a transmission mechanism for providing kinetic energy and intermittently changing the output direction. The bottom of the mixing mechanism is equipped with a filtration mechanism for opening and closing to filter impurities. The filtration mechanism includes two symmetrically arranged filter boxes. A rack is slidably arranged inside the filter box. A screen is arranged at the outer end of the rack. A slide rail is arranged at the bottom of the rack.

[0008] Preferably, the mixing mechanism includes a tank, with two drain pipes symmetrically arranged at the bottom of the tank, a water inlet pipe fixedly arranged at the top of the tank, a rotating shaft rotatably arranged in the middle of the tank, a plurality of stirring paddles evenly fixedly arranged in the middle circumference of the rotating shaft, a first gear arranged at the top of the rotating shaft, and a second gear arranged at the bottom of the rotating shaft.

[0009] Preferably, the transmission mechanism includes a mounting frame, with two No. 3 gears symmetrically rotatably arranged at the bottom of the mounting frame, a power supply motor mounted on the top of the No. 3 gears, and a No. 4 gear arranged at the bottom of the No. 3 gears.

[0010] Preferably, the first gear and the second gear are respectively splined to the rotating shaft.

[0011] Preferably, the fourth gear is an incomplete gear and meshes with the first gear.

[0012] Preferably, the drain pipe is connected to the two filter boxes on one side close to each other.

[0013] Preferably, a liquid collection tank is provided at the bottom of the filter box on the side away from the drain pipe.

[0014] Preferably, the slide rail has a T-shaped cross-section and is slidably connected to the rack, and the screen is welded to the rack.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. In this utility model, multiple gears are used to drive a single motor to complete the stirring and squeezing actions, thus completing the water purification steps from mixing the water purification agent to separating the pollutants. This saves costs while being highly efficient.

[0017] 2. In this utility model, the rotating shaft is driven to rotate by an incomplete gear, so that the rotation direction of the rotating shaft changes intermittently, ensuring that the water purification agent and sewage are fully mixed, and at the same time facilitating the opening and closing of the screen.

[0018] 3. In this utility model, the stirring paddle can perform periodic direction-changing stirring by rotating the output shaft of the power motor in one direction, without the need to frequently change the output direction. This reduces the motor load and extends the service life of the device. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a pre-purification device for wastewater discharge in a cooling tower according to the present invention;

[0020] Figure 2 This is a partial cross-sectional view of the mixing mechanism of the wastewater pre-purification device for cooling towers described in this utility model;

[0021] Figure 3 This is a schematic diagram of the transmission mechanism of the wastewater pre-purification device for cooling towers described in this utility model;

[0022] Figure 4 This is a partial cross-sectional view of the filtration mechanism of a pre-purification device for wastewater discharge in a cooling tower, as described in this utility model.

[0023] In the attached diagram, the following are the reference numerals: 1. Mixing mechanism; 101. Tank body; 102. Rotating shaft; 103. Stirring paddle; 104. Drain pipe; 105. Gear No. 1; 106. Gear No. 2; 107. Inlet pipe; 2. Transmission mechanism; 201. Mounting bracket; 202. Gear No. 3; 203. Power supply motor; 204. Gear No. 4; 3. Filtration mechanism; 301. Filter box; 302. Rack; 303. Screen; 304. Liquid collection tank; 305. Slide rail. Detailed Implementation

[0024] 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.

[0025] Please see Figures 1-4 A pre-purification device for wastewater discharge in a cooling tower includes a mixing mechanism 1 for mixing agents and transmitting power, a transmission mechanism 2 for providing kinetic energy and intermittently changing the output direction at the top of the mixing mechanism 1, and a filter mechanism 3 for opening and closing to filter impurities at the bottom of the mixing mechanism 1.

[0026] In this embodiment: the mixing mechanism 1 includes a tank 101, with two drain pipes 104 symmetrically arranged at the bottom of the tank 101, and a water inlet pipe 107 fixedly arranged at the top of the tank 101. A rotating shaft 102 is rotatably arranged in the middle of the tank 101, and several stirring paddles 103 are evenly fixedly arranged around the circumference of the rotating shaft 102. A first gear 105 is arranged at the top of the rotating shaft 102, and a second gear 106 is arranged at the bottom of the rotating shaft 102. The drain pipes 104 are connected to the two filter boxes 301 on one side close to each other. The first gear 105 and the second gear 106 are respectively splined connected to the rotating shaft 102. Sewage flows into the tank 101 along the water inlet pipe 107, and the water purification agent is simultaneously added into the tank 101. The stirring paddles 103 agitate the sewage in the tank 101, so that it is fully mixed with the water purification agent, and the pollutants flocculate. After the mixing is completed, the drain pipe 104 at the bottom of the tank 101 is opened to guide the sewage into the two filter boxes 301.

[0027] In this embodiment: the transmission mechanism 2 includes a mounting frame 201. Two No. 3 gears 202 are symmetrically rotatably arranged at the bottom of the mounting frame 201. A power supply motor 203 is installed on the top of the No. 3 gears 202. A No. 4 gear 204 is arranged at the bottom of the No. 3 gears 202. The No. 4 gear 204 is an incomplete gear and meshes with the No. 1 gear 105. The power supply motor 203 drives the bottom No. 3 gear 202 to rotate. The No. 3 gear 202 on the same side rotates. The two No. 3 gears 202 synchronously drive the bottom No. 4 gear 204 to rotate in opposite directions. When one side of the No. 4 gear 204 meshes with the middle No. 1 gear 105, the other side of the No. 4 gear 204 idles. The two No. 4 gears 204 respectively mesh with the No. 1 gear 105 and rotate a certain distance, so that the No. 1 gear 105 intermittently changes the direction of rotation.

[0028] In this embodiment: the filtration mechanism 3 includes two symmetrically arranged filter boxes 301. A rack 302 is slidably arranged inside the filter box 301. A screen 303 is arranged at the outer end of the rack 302. A slide rail 305 is arranged at the bottom of the rack 302. A liquid collection tank 304 is opened on the bottom of the filter box 301 away from the drain pipe 104. The slide rail 305 has a T-shaped cross section and is slidably connected to the rack 302. The screen 303 is welded to the rack 302. When the rotating shaft 102 rotates, it synchronously drives the second gear 106 to rotate. The second gear 106 meshes with the racks 302 on both sides, so that it drives the screen 303 to move under the support of the slide rail 305. Because the second gear 106 keeps changing the direction of rotation, the rack 302 also keeps moving left and right. Therefore, the two screens 303 open and close evenly and move to squeeze the sewage in the filter box 301. The pollutants are isolated and the clean water flows out from the liquid collection tank 304.

[0029] Working principle: During use, wastewater flows into tank 101 through inlet pipe 107, and water purification agent is simultaneously added into tank 101. The power motor 203 drives the bottom third gear 202 to rotate, meshing with the third gear 202 on the same side. The two third gears 202 simultaneously drive the bottom fourth gear 204 to rotate in opposite directions. When one fourth gear 204 meshes with the middle first gear 105, the other fourth gear 204 idles. The two fourth gears 204 mesh with the first gear 105 respectively, rotating a certain distance, causing the first gear 105 to intermittently change its rotation direction. The first gear 105 drives the stirring paddle 103 to rotate via the rotating shaft 102. The stirring paddle 103 agitates the wastewater in the tank 101, making it fully mixed with the water purification agent. The pollutants flocculate. After mixing, the drain pipe 104 at the bottom of the tank 101 is opened, guiding the wastewater into the two filter boxes 301. When the rotating shaft 102 rotates, it synchronously drives the second gear 106 to rotate. The second gear 106 meshes with the racks 302 on both sides, causing the screens 303 to move under the support of the slide rail 305. Because the second gear 106 keeps changing the direction of rotation, the racks 302 also keep moving left and right. Therefore, the two screens 303 open and close evenly, squeezing the wastewater in the filter box 301. The pollutants are isolated and the purified water flows out from the collection tank 304.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pre-purification device for wastewater discharge in a cooling tower, comprising a mixing mechanism (1) for mixing reagents and transmitting power, characterized in that: The mixing mechanism (1) is provided with a transmission mechanism (2) at the top for providing kinetic energy and intermittently changing the output direction, and a filter mechanism (3) at the bottom for opening and closing motion to filter impurities. The filtration mechanism (3) includes two symmetrically arranged filter boxes (301). A rack (302) is slidably arranged inside the filter box (301). A screen (303) is arranged at the outer end of the rack (302). A slide rail (305) is arranged at the bottom of the rack (302).

2. The pre-purification device for wastewater discharge of a cooling tower according to claim 1, characterized in that: The mixing mechanism (1) includes a tank (101), with two drain pipes (104) symmetrically arranged at the bottom of the tank (101), a water inlet pipe (107) fixedly arranged at the top of the tank (101), a rotating shaft (102) rotatably arranged in the middle of the tank (101), a plurality of stirring paddles (103) evenly fixedly arranged in the middle circumference of the rotating shaft (102), a first gear (105) arranged at the top of the rotating shaft (102), and a second gear (106) arranged at the bottom of the rotating shaft (102).

3. The pre-purification device for wastewater discharge of a cooling tower according to claim 2, characterized in that: The transmission mechanism (2) includes a mounting frame (201), with two No. 3 gears (202) symmetrically rotated at the bottom of the mounting frame (201), a power supply motor (203) mounted on the top of the No. 3 gears (202), and a No. 4 gear (204) mounted at the bottom of the No. 3 gears (202).

4. The pre-purification device for wastewater discharge of a cooling tower according to claim 3, characterized in that: The first gear (105) and the second gear (106) are respectively splined to the rotating shaft (102).

5. A pre-purification device for wastewater discharge in a cooling tower according to claim 3, characterized in that: The fourth gear (204) is an incomplete gear and meshes with the first gear (105).

6. A pre-purification device for wastewater discharge in a cooling tower according to claim 2, characterized in that: The drain pipe (104) is connected to the two filter boxes (301) on one side close to each other.

7. A pre-purification device for wastewater discharge in a cooling tower according to claim 2, characterized in that: A liquid collection tank (304) is provided on the bottom side of the filter box (301) away from the drain pipe (104).

8. A pre-purification device for wastewater discharge in a cooling tower according to claim 1, characterized in that: The slide rail (305) has a T-shaped cross section and is slidably connected to the rack (302), and the screen (303) is welded to the rack (302).

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