A wastewater treatment device with gas-liquid-solid separation

Abstract

This utility model discloses a wastewater treatment device with gas-liquid-solid separation, relating to the technical field of the chemical industry. It includes a wastewater tank and a collection tank. A partition is installed inside the wastewater tank, dividing it into a storage area and a suction area. The upper part of the storage area is connected to the upper part of the suction area, and the bottom of the storage area is lower than the bottom of the suction area. An exhaust fan is also installed on the wastewater tank to extract gas from the tank to an incinerator. A slurry pump and a wastewater pump are also installed on the wastewater tank. The inlet of the slurry pump is connected to the bottom of the storage area via a pipe, and the outlet of the slurry pump is connected to the collection tank via a pipe. A filter is installed at the bottom of the suction area, and the inlet of the wastewater pump is connected to the outlet of the filter via a pipe. This utility model ensures effective gas-liquid-solid three-phase separation in the wastewater tank. Simultaneously, it requires minimal manual intervention, reducing labor intensity, exhibiting a high level of automation, and is environmentally friendly.

Description

Technical Field

[0001] This utility model relates to the technical field of the chemical industry, and more specifically, to a wastewater treatment device for gas-liquid-solid separation. Background Technology

[0002] Wastewater treatment ponds in chemical plants are an important component of wastewater treatment systems in chemical enterprises. They are mainly used to collect, temporarily store, and preliminarily treat industrial wastewater generated during production. Because chemical wastewater typically contains volatile organic compounds and solid impurities, the design and operation of wastewater treatment ponds directly affect the company's environmental compliance and safe production.

[0003] The top of a chemical plant's wastewater pond usually contains volatile substances. These volatile substances are flammable, explosive, and toxic. Direct discharge into the atmosphere will pollute the environment and, in severe cases, endanger human life and health. The bottom of the wastewater pond usually contains sediment and sludge, which are difficult to clean.

[0004] The existing factory sewage tank pumps are manually started and stopped by monitoring the liquid level, and the sludge at the bottom of the sewage tank is cleaned manually, which is labor-intensive. Most of the volatile substances in the sewage tank are discharged on-site, and some enterprises vent them into the atmosphere at a relatively high altitude through exhaust pipes, causing environmental pollution. Utility Model Content

[0005] The purpose of this invention is to provide a wastewater treatment device for gas-liquid-solid separation, which ensures effective separation of the gas, liquid, and solid phases in the wastewater tank. At the same time, it requires minimal manual intervention, reducing labor intensity, and features a high level of automation and environmental friendliness.

[0006] To achieve the purpose of this utility model, the technical solution adopted is as follows: a wastewater treatment device for gas-liquid-solid separation, including a wastewater tank and a collection tank. A partition is installed inside the wastewater tank, dividing the wastewater tank into a storage area and a water absorption area. The upper part of the storage area is connected to the upper part of the water absorption area, and the bottom of the storage area is lower than the bottom of the water absorption area. An exhaust fan for pumping gas from the wastewater tank to the incinerator is also installed on the wastewater tank. A mud pump and a wastewater pump are also installed on the wastewater tank. The inlet end of the mud pump is connected to the bottom of the storage area through a pipe, and the outlet end of the mud pump is connected to the collection tank through a pipe. A filter is installed at the bottom of the water absorption area, and the inlet end of the wastewater pump is connected to the outlet end of the filter through a pipe.

[0007] Furthermore, the wastewater tank is also equipped with a stirrer, the output shaft of which extends to the bottom of the storage area, and stirring blades are also installed on the output shaft of the stirrer.

[0008] Furthermore, the sewage tank is also equipped with a densitometer for detecting the density of the slurry at the bottom of the storage area, and the densitometer is linked to the agitator and the slurry pump.

[0009] Furthermore, the wastewater tank is also equipped with a level gauge for detecting the liquid level in the water absorption area, and the level gauge is linked to the wastewater pump.

[0010] Furthermore, a pressure gauge for detecting the internal pressure of the sewage tank is also installed on the sewage tank, and the pressure gauge is linked to the exhaust fan.

[0011] Furthermore, there are two filters and two sewage pumps, with the inlet ends of the two sewage pumps connected to the outlet ends of the two filters respectively via pipes.

[0012] Furthermore, a water filter is installed on the upper part of the collection tank, and the water filter is connected to the storage area in the sewage tank through a pipe.

[0013] Furthermore, a mud discharge port is also installed at the bottom of the collection tank.

[0014] Furthermore, the volume of the storage area is 1.5 to 3 times the volume of the water absorption area.

[0015] Furthermore, the height of the partition is 1 / 3 to 2 / 3 of the height of the water absorption zone.

[0016] The beneficial effects of this utility model are:

[0017] The wastewater tank is divided into a storage area and a water absorption area by a partition, and the bottom of the storage area is lower than the bottom of the water absorption area. This effectively isolates the two areas, increases the volume of the storage area, and allows the sludge carried in the wastewater to settle at the bottom of the storage area, thus improving the solid-liquid separation effect.

[0018] The system uses data from level gauges to start and stop sewage pumps, pressure gauges to start and stop exhaust fans, and density gauges to start agitators and slurry pumps, achieving fully automated control. This allows the system to automatically separate the gas, liquid, and solid phases of sewage when needed, without manual intervention. This ensures the safe operation of the sewage treatment plant while reducing labor intensity and environmental pollution. Attached Figure Description

[0019] The accompanying drawings illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the principles of the present invention. These drawings are included to provide a further understanding of the present invention and are incorporated in and constitute a part of this specification.

[0020] Figure 1 This is a structural diagram of the wastewater treatment device for gas-liquid-solid separation provided by this utility model.

[0021] The attached diagram shows the markings and corresponding component names:

[0022] 1-Sewage tank; 2-Storage area; 3-Water suction area; 4-Baffle; 5-Sewage pump; 7-Exhaust fan; 8-Agitator; 9-Sludge pump; 10-Collection tank; 11-Filter; 12-Agitator blade; 13-Water filter; 14-Sludge discharge port; 21-Level gauge; 22-Pressure gauge; 23-Density meter. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the accompanying drawings.

[0024] It should be noted that, where there is no conflict, the embodiments and features described in these embodiments can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] like Figure 1 As shown, the present invention provides a wastewater treatment device for gas-liquid-solid separation, including a wastewater tank 1 and a collection tank 10. The wastewater tank 1 is used to treat wastewater, and the collection tank 10 is used to collect the treated sludge. A partition 4 is installed inside the wastewater tank 1, which divides the wastewater tank 1 into a storage area 2 and a water absorption area 3. The height of the partition 4 is 1 / 3 to 2 / 3 of the height of the water absorption area 3. The volume of the storage area 2 is 1.5 to 3 times the volume of the water absorption area 3. The upper part of the storage area 2 is connected to the upper part of the water absorption area 3, so that the wastewater in the storage area 2 can overflow into the back-suction area 3 through the upper edge of the partition 4 after treatment. At the same time, in order to minimize the sludge in the storage area 2 from entering the back-suction area 3, prolong the settling time of the sludge in the wastewater in the storage area 2, and improve the separation of the solid and liquid phases in the wastewater, the bottom height of the storage area 2 is lower than the bottom height of the water absorption area 3. In order to make the bottom height of storage area 2 lower than the bottom height of water absorption area 3, the bottom surface of sewage tank 1 can be set as a stepped surface or the bottom surface of sewage tank 1 can be set as a flat surface. Then, the bottom height of water absorption area 3 can be increased by installing a pad in water absorption area 3.

[0026] The top of the wastewater tank 1 is also equipped with an exhaust fan 7, a mud pump 9, and a wastewater pump 5. The inlet of the exhaust fan 7 is connected to the upper part of the wastewater tank 1 through a pipe to prevent the exhaust fan 7 from drawing out the liquid in the wastewater tank 1 and to ensure the normal operation of the exhaust fan 7. The outlet of the exhaust fan 7 is connected to the incinerator through a pipe, so that the gas in the wastewater tank 1 can be drawn to the incinerator for combustion, thereby producing steam of different grades. This not only prevents the wastewater tank 1 from becoming pressurized, making the wastewater tank 1 safe and reliable, but also avoids environmental pollution caused by the direct emission of gas from the wastewater tank 1, and makes the waste gas utilization rate higher. The inlet of the mud pump 9 is connected to the bottom of the storage area 2 through a pipe. The mud pump 9 is connected to the collection tank 10 via a pipe, allowing the mud pump 9 to pump the mud from the bottom of the storage area 2 to the collection tank 10 for treatment. A filter 11 is also installed at the bottom of the suction area 3, which effectively filters out the small amount of sludge carried by the sewage in the suction area 3. The inlet of the sewage pump 5 is connected to the outlet of the filter 11 via a pipe, and the outlet of the sewage pump 5 is connected to the subsequent treatment equipment via a pipe. This allows the sewage in the suction area 3 to be filtered by the filter 11 before entering the pipe and being pumped to the subsequent treatment equipment by the sewage pump 5, thus preventing damage to the sewage pump 5.

[0027] A mixer 8 is also installed on the top of the sewage tank 1. The output shaft of the mixer 8 extends to the bottom of the storage area 2, and a mixing blade 12 is also installed on the output shaft of the mixer 8. In order to avoid collision between the mixer 8 and the pipe extending to the bottom of the storage area 2 during the rotation of the mixing blade 12, the inlet end of the pipe connected to the inlet end of the mud pump 9 is located above the mixing blade 12. Of course, if it is ensured that the mixing blade 12 will not collide with the pipe during rotation, the inlet end of the pipe can also be located outside the mixing radius of the mixing blade 12 or below the mixing blade 12.

[0028] To facilitate the control of the agitator 8 and the sludge pump 9, a densitometer 23 is also installed on the sewage tank 1. The densitometer 23 is used to detect the density of the sludge above the agitator blades 12, and the signal of the densitometer 23 is connected to the motor signal of the agitator 8 and the motor signal of the sludge pump 9. When the densitometer 23 measures the density above the agitator blades 12 in the storage area 2, and the density display increases to the set value, the motor of the agitator 8 starts automatically and agitates the sludge at the bottom of the storage area 2. After the agitator 8 runs for 30 to 60 seconds, the motor of the sludge pump 9 starts automatically and transports the sludge to the collection tank 10. The agitator 8 and the sludge pump 9 stop running after 30 to 120 minutes.

[0029] A level gauge 21 is also installed on the sewage tank 1. The level gauge 21 is used to detect the height of the liquid level in the suction zone 3. The signal of the level gauge 21 is connected to the motor signal of the sewage pump 5. The liquid level display of the level gauge 21 is 0% to 100%. When the level gauge 21 shows that the liquid level in the suction zone 3 is 80%, the sewage pump 5 is started; when the level gauge 21 shows that the liquid level in the suction zone 3 is 20%, the sewage pump 5 is stopped. In order to ensure the pumping of sewage in the suction zone 3, there are two sewage pumps 5, namely sewage pump A and sewage pump B. At the same time, there are also two filters 11 installed at the bottom of the suction zone 3. The outlet ends of the two filters 11 are connected to the inlet ends of sewage pump A and sewage pump B respectively through pipes. At the same time, the signals of the level gauge 21 are connected to the motor signals of sewage pump A and sewage pump B respectively. Sewage pump A and sewage pump B are used in a one-on-one standby configuration.

[0030] A pressure gauge 22 is also installed on the sewage tank 1. The pressure gauge 22 is used to detect the gas pressure inside the sewage tank 1. The signal of the pressure gauge 22 is connected to the motor signal of the exhaust fan 7, and the exhaust fan 7 is preset with low pressure and high pressure values. When the pressure value of the pressure gauge 22 exceeds the preset high pressure value of the exhaust fan 7, the exhaust fan 7 starts automatically and draws the volatile gas in the sewage tank 1 to the incinerator for combustion. When the pressure value of the pressure gauge 22 is lower than the preset low pressure value of the exhaust fan 7, the exhaust fan 7 stops automatically, thereby ensuring that the sewage tank 1 is always in a positive pressure state.

[0031] The upper part of the collection tank 10 is also equipped with a water filter 13. There are 2 to 4 water filters 13, and the multiple water filters 13 are evenly spaced along the height direction of the collection tank 10. The multiple water filters 13 are connected to the storage area 2 in the sewage tank 1 through pipes to ensure that the water in the collection tank 10 returns to the sewage tank 1 through the water filters 13.

[0032] The bottom of the collection tank 10 is also equipped with a sludge discharge port 14, and there are 1 to 4 sludge discharge ports 14. Multiple sludge discharge ports 14 are arranged around the collection tank 10 to facilitate the discharge and collection of sludge in the collection tank 10. In order to facilitate the opening and closing of the sludge discharge ports 14, gates are also installed on the sludge discharge ports 14.

[0033] In this utility model, when sewage needs to be treated, the sewage to be treated is continuously sent into the storage area 2 of the sewage tank 1. The sludge in the sewage settles in the storage area 2. During the settling process, the settled sewage overflows into the water absorption area 3 through the upper edge of the partition 4.

[0034] During this process, the level gauge 21 detects the liquid level in the suction zone 3 in real time and transmits the detected liquid level signal to the motors of sewage pump A and sewage pump B. When the level gauge 21 detects that the liquid level in the suction zone 3 is 80%, the motor of sewage pump A or sewage pump B is started, so that the sewage in the suction zone 3 is filtered through the filter 11 and then pumped to the subsequent treatment equipment by sewage pump A or sewage pump B. When the level gauge 21 shows that the liquid level in the suction zone 3 is 20%, the motor of sewage pump A or sewage pump B stops running, and sewage pump A or sewage pump B stops pumping sewage in the suction zone 3, thereby ensuring that there is enough sewage in the storage zone 2 for sludge to settle.

[0035] Meanwhile, pressure gauge 22 monitors the gas pressure in sewage tank 1 in real time. Pressure gauge 22 transmits the detected gas pressure signal to the motor of exhaust fan 7. When the pressure value detected by pressure gauge 22 exceeds the preset high pressure value of exhaust fan 7, the motor of exhaust fan 7 starts automatically and exhausts the volatile gas in sewage tank 1 to the incinerator for combustion. When the pressure value detected by pressure gauge 22 is lower than the preset low pressure value of exhaust fan 7, the motor of exhaust fan 7 stops automatically, thereby ensuring that sewage tank 1 is always in a positive pressure state, effectively treating flammable, explosive and toxic gases, which is environmentally friendly.

[0036] In addition, the densitometer 23 detects the density above the stirring blades 12 in the storage area 2 in real time. The densitometer 23 transmits the detected density signal to the motor of the agitator 8 and the motor of the mud pump 9. When the densitometer 23 measures that the density above the stirring blades 12 in the storage area 2 has increased to the set value, the motor of the agitator 8 starts automatically, so that the stirring blades 12 on the output shaft of the agitator 8 rotate synchronously, thereby stirring the sludge at the bottom of the storage area 2. After the motor of the agitator 8 has been running for 30 to 60 seconds, the motor of the mud pump 9 starts automatically and transports the sludge to the collection tank 10. After the agitator 8 and the mud pump 9 have been running for 30 to 120 minutes, the motors of the agitator 8 and the mud pump 9 stop running.

[0037] After the mud pump 9 pumps the mud from the storage area 2 to the collection tank 10, the mud settles in the collection tank 10. During this process, the wastewater generated during the mud settling process is filtered by the water filter 13 and then returned to the wastewater tank 1. When the sludge settled in the collection tank 10 reaches a certain height, the mud discharge port 14 is opened, and the sludge in the collection tank 10 is transported from the mud discharge port 14 to the next process. When all the sludge in the collection tank 10 has been discharged to a certain extent, the mud discharge port 14 is closed.

[0038] In this utility model, the density meter 23, pressure meter 22, and level meter 21 are all direct applications of existing technology, and the linkage between the density meter 23, pressure meter 22, level meter 21 and the motor is also a direct application of existing methods. At the same time, the density meter 23, pressure meter 22, and level meter 21 themselves are not improvements of this utility model, nor is the linkage method between the density meter 23, pressure meter 22, level meter 21 and the motor an improvement of this utility model, and will not be elaborated here.

[0039] Those skilled in the art should understand that the above embodiments are merely for clearly illustrating the present invention and are not intended to limit the scope of the present invention. Those skilled in the art can make other changes or modifications based on the above disclosure, and these changes or modifications still fall within the scope of the present invention.

Claims

1. A wastewater treatment device for gas-liquid-solid separation, characterized in that, The system includes a sewage tank (1) and a collection tank (10). A partition (4) is installed inside the sewage tank (1), which divides the sewage tank (1) into a storage area (2) and a water absorption area (3). The upper part of the storage area (2) is connected to the upper part of the water absorption area (3), and the bottom of the storage area (2) is lower than the bottom of the water absorption area (3). A blower (7) for pumping gas from the sewage tank (1) to the incinerator is also installed on the sewage tank (1). A mud pump (9) and a sewage pump (5) are also installed on the sewage tank (1). The inlet end of the mud pump (9) is connected to the bottom of the storage area (2) through a pipe, and the outlet end of the mud pump (9) is connected to the collection tank (10) through a pipe. A filter (11) is installed at the bottom of the water absorption area (3), and the inlet end of the sewage pump (5) is connected to the outlet end of the filter (11) through a pipe.

2. The wastewater treatment device for gas-liquid-solid separation according to claim 1, characterized in that, A stirrer (8) is also installed on the sewage tank (1). The output shaft of the stirrer (8) extends to the bottom of the storage area (2), and a stirring blade (12) is also installed on the output shaft of the stirrer (8).

3. The wastewater treatment device for gas-liquid-solid separation according to claim 2, characterized in that, The sewage tank (1) is also equipped with a densitometer (23) for detecting the density of the mud at the bottom of the storage area (2), and the densitometer (23) is linked to the agitator (8) and the mud pump (9).

4. The wastewater treatment device for gas-liquid-solid separation according to claim 1, characterized in that, The sewage tank (1) is also equipped with a level gauge (21) for detecting the liquid level in the water absorption area (3), and the level gauge (21) is linked to the sewage pump (5).

5. The wastewater treatment device for gas-liquid-solid separation according to claim 4, characterized in that, There are two filters (11) and two sewage pumps (5). The inlet ends of the two sewage pumps (5) are connected to the outlet ends of the two filters (11) respectively through pipes.

6. The wastewater treatment device for gas-liquid-solid separation according to claim 1, characterized in that, The sewage tank (1) is also equipped with a pressure gauge (22) for detecting the internal pressure of the sewage tank (1), and the pressure gauge (22) is linked to the exhaust fan (7).

7. The wastewater treatment device for gas-liquid-solid separation according to claim 1, characterized in that, A water filter (13) is also installed on the upper part of the collection tank (10), and the water filter (13) is connected to the storage area (2) in the sewage tank (1) through a pipe.

8. The wastewater treatment device for gas-liquid-solid separation according to claim 1, characterized in that, The bottom of the collection tank (10) is also equipped with a mud discharge port (14).

9. The wastewater treatment device for gas-liquid-solid separation according to claim 1, characterized in that, The volume of the storage area (2) is 1.5 to 3 times the volume of the water absorption area (3).

10. The wastewater treatment device for gas-liquid-solid separation according to claim 1, characterized in that, The height of the partition (4) is 1 / 3 to 2 / 3 of the height of the water absorption zone (3).

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