Granular sludge recovery device

Abstract

The utility model discloses a granular sludge recovery device which comprises a water inlet, the water inlet is communicated with a buffer tank, the top of the buffer tank is provided with a plurality of groups of water outlet holes, an outlet of the buffer tank is fixedly provided with a filter screen, a plurality of groups of nozzles are arranged above the filter screen, a filtrate tank is arranged below the filter screen, and a water outlet pipe is arranged below the filtrate tank. A sludge tank is fixedly arranged at the bottom of the filter screen, the bottom of the sludge tank is communicated with a sludge pipe, and the sludge pipe is communicated with a sludge treatment tank. After sewage is discharged into the buffer tank, the flow speed of the sewage is slowed down, and the interior of the buffer tank can be washed through the water outlet holes, so that the probability that granular sludge is possibly remained is reduced; after muddy water in the sludge tank reaches a designed water level value, the water level monitor sends signals to the electromagnetic valve and the sludge pump, the electromagnetic valve is opened, the sludge pump pumps the muddy water in the sludge tank into the sludge treatment tank for treatment, the sludge pump does not work at other time, and energy consumption is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of sludge recovery equipment, in particular to a granular sludge recovery device. Background Art

[0002] The formation of granular sludge is actually a form of microbial immobilization, and its appearance is relatively regular spherical or elliptical black particles. The particle size of granular sludge is generally 0.1-3mm, and some large ones are 5mm. The density is 1.04-1.08g / cm3, which is slightly heavier than water. It has good sedimentation performance and methanogenic activity for degrading organic matter in water. Under an optical microscope, granular sludge has a porous structure, with a layer of transparent colloid on the surface, on which methanogens are attached. The market price of dry granular sludge is relatively high, and it has a high recycling value.

[0003] For example, a granular sludge recovery device (Announcement No.: CN213112700U) is disclosed in the prior art. The utility model includes a water inlet area, a mud-water separation area and a granular sludge recovery area with decreasing heights from upstream to downstream, and is characterized in that: the water inlet area, the mud-water separation area and the granular sludge recovery area are separated by vertical partitions, and the height of the partitions decreases from upstream to downstream; the mud-water separation area includes a first partition between the water inlet area and the mud-water separation area and a filter screen on a second partition between the mud-water separation area and the granular sludge recovery area, and the horizontal inclination angle of the filter screen is 25-40 degrees. The granular sludge recovery device of the utility model can filter out the flocculent sludge in the reactor while intercepting and recovering the granular sludge lost in the effluent of the bioreactor, and has a simple and compact structure and strong applicability.

[0004] However, in this utility model, the muddy water is first introduced into the water inlet buffer tank, and then the muddy water in the water inlet buffer tank is slowly filled and overflows onto the filter screen for filtration. In this process, some granular sludge may settle at the bottom, causing waste. Therefore, we need to propose a granular sludge recovery device. Utility Model Content

[0005] The purpose of the utility model is to provide a granular sludge recovery device. Through the design of the buffer tank and the water outlet hole, the sewage in the water inlet pipe flows directly onto the filter screen through the buffer tank, and the water outlet hole can clean the buffer tank to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A granular sludge recovery device comprises a water inlet, wherein the water inlet is connected to a buffer tank, the buffer tank is arranged in a rectangular shape and the outlet is also arranged in a rectangular shape, the buffer tank is arranged in a 304 stainless steel buffer tank, a plurality of groups of water outlet holes are arranged on the top of the buffer tank, a bracket is fixedly installed on the bottom of the buffer tank, a filter is fixedly installed on the outlet of the buffer tank, a plurality of groups of nozzles are arranged above the filter, a filtrate pool is arranged below the filter, a water outlet pipe is arranged below the filtrate pool, a sludge pool is fixedly arranged at the bottom of the filter, a sludge pipe is connected to the bottom of the sludge pool, and the sludge pipe is connected to a sludge treatment tank.

[0008] Preferably, a filter frame is fixedly connected to the bottom of the buffer tank, a placement slot is provided on the filter frame, and the filter is detachably installed in the placement slot.

[0009] Preferably, threaded holes are provided on the frame of the placement groove and the filter screen, and fixing bolts are threadedly installed in the threaded holes.

[0010] Preferably, the filter frame is configured as an inclined 304 stainless steel filter frame, and water retaining plates are fixedly connected to both sides of the filter frame, and the water retaining plates are configured as 304 stainless steel water retaining plates.

[0011] Preferably, a solenoid valve is provided in the sludge pipe, the sludge pipe is connected to a sludge pump, and the sludge pump is connected to a sludge treatment tank through a pipeline.

[0012] Preferably, a water level monitor is fixedly installed in the sludge pool, and the water level monitor is connected to the solenoid valve and the sludge pump signal.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] Through the design of the buffer tank and the water outlet, after the utility model discharges the sewage from the water inlet into the buffer tank, because the volume of the buffer tank is much larger than the water inlet pipe, the sewage can achieve the purpose of slowing down the flow rate, and at the same time the sewage will not stay in the buffer tank, reducing the possibility of residual granular sludge, and the inside of the buffer tank can be flushed through the water outlet, further reducing the possibility of residual granular sludge; through the design of the water level monitor, the solenoid valve and the water pump, after the muddy water in the sludge pool reaches the designed water level value, the water level monitor sends a signal to the solenoid valve and the sludge pump, the solenoid valve opens, and the sludge pump pumps the muddy water in the sludge pool into the sludge treatment tank for treatment. The sludge pump does not work at other times, reducing the working time of the sludge pump and saving energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2This is a schematic diagram of the structure of the filter frame of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the filter frame and filter of the utility model.

[0018] In the figure: 1. water inlet; 2. buffer tank; 3. water outlet; 4. bracket; 5. filter; 6. nozzle; 7. filtrate tank; 8. outlet pipe; 9. sludge tank; 10. sludge pipe; 11. sludge treatment tank; 12. filter rack; 13. placement tank; 14. water baffle; 15. solenoid valve; 16. sludge pump; 17. water level monitor. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 , the utility model provides a technical solution:

[0021] like Figure 1 As shown, a granular sludge recovery device includes a water inlet 1, the water inlet 1 is connected to a buffer tank 2, the buffer tank 2 is set in a rectangular shape and the outlet is also set in a rectangular shape, the buffer tank 2 is set in a 304 stainless steel buffer tank, the top of the buffer tank 2 is set with a plurality of groups of water outlet holes 3, and the bottom of the buffer tank 2 is fixedly installed with a bracket 4. After the device discharges sewage from the water inlet 1 into the buffer tank 2, because the volume of the buffer tank 2 is much larger than the water inlet pipe, the flow rate of the sewage in the buffer tank 2 is slowed down, thereby achieving the purpose of slowing down the flow rate. At the same time, the sewage always flows in the buffer tank 2 and will not stay in the buffer tank 2, reducing the possibility of granular sludge. The probability of mud settling and remaining, and the inside of the buffer tank 2 can be flushed through the water outlet 3, so that the sludge that may remain in the buffer tank 2 is washed away, further reducing the probability of possible granular sludge remaining, thereby reducing the waste of granular sludge. The water outlet 3 is connected to the water pump, and the water pump can be arranged at the bottom of the bracket 4 to reduce the floor space, and the water in the pool connected to the water pump is set to clean water; the buffer tank 2 is set to a buffer tank 2 made of 304 stainless steel. The buffer tank 2 of this material has good corrosion resistance, heat resistance, low-temperature strength and mechanical properties, can avoid being corroded by sewage, and extend the service life of the device.

[0022] like Figure 1-3As shown, the bottom of the buffer tank 2 is fixedly connected with a filter frame 12, and a placement slot 13 is provided on the filter frame 12. The filter 5 is detachably installed in the placement slot 13. The placement slot 13 and the frame of the filter 5 are provided with threaded holes, and fixing bolts are threadedly installed in the threaded holes. The filter frame 12 is set as an inclined 304 stainless steel filter frame, and the two sides of the filter frame 12 are fixedly connected with a water baffle 14, and the water baffle 14 is set as a 304 stainless steel water baffle. A plurality of groups of nozzles 6 are arranged above the filter 5, and a filtrate pool 7 is arranged below the filter 5, and a water outlet pipe 8 is arranged below the filtrate pool 7. A sludge pool 9 is fixedly arranged at the bottom of the filter 5, and a sludge pipe 10 is connected to the bottom of the sludge pool 9, and the sludge pipe 10 is connected to the sludge treatment tank 11. A solenoid valve 15 is arranged in the sludge pipe 10, and the sludge pipe 10 is connected to the sludge pump 16, and the sludge pump 16 is connected to the sludge treatment tank 11 through a pipeline. A water level monitor 17 is fixedly installed in the sludge tank 9 , and the water level monitor 17 is signal-connected to the solenoid valve 15 and the sludge pump 16 .

[0023] The sewage in the buffer tank 2 flows onto the filter screen 5, and the water baffle 14 prevents the sewage from flowing out of the filter screen 5. The sewage and the flocculent sludge therein flow through the filter screen 5 into the filtrate pool 7, and then flow along the outlet pipe 8 into the sewage treatment pool to continue to process the flocculent sludge in the sewage; while the granular sludge is blocked by the filter screen, flows into the sludge pool 9 along the filter screen 5, and at the same time, the nozzle 6 starts to spray water on the filter screen 5, and the nozzle 6 is connected to the water pump. The nozzle 6 can be installed above the baffle through a bracket, and the water pump can be installed below the filtrate pool 7. The sprayed water can clean the granular sludge, so that the flocculent sludge that may be stained on the granular sludge is cleaned and flows into the filtrate pool 7, and the cleaning water can flow into the sludge pool 9 with the granular sludge to prevent the granular sludge from staying on the filter screen 5. At the same time, the cleaning water can also clean the impurities in some holes of the filter screen 5 and discharge them into the filtrate pool, so that the filter screen 5 can maintain normal operation. When the filter screen 5 is damaged, the filter screen 5 can be removed by releasing the bolts to replace and repair it. After the granular sludge and cleaning water enter the sludge pool 9, the liquid level in the sludge pool 9 rises. When it reaches the set value of the water level monitor 17, the solenoid valve 15 and the sludge pump 16 are opened to pump the muddy water in the sludge pool 9 into the sludge treatment tank for treatment. After the muddy water is pumped away, the solenoid valve 15 and the sludge pump 16 are closed. Because the rate at which the muddy water enters the sludge pool 9 is lower than the rate at which the sludge pump 16 extracts the muddy water, the sludge pump 16 is turned on intermittently to save energy.

[0024] Working principle: The sewage containing granular sludge is discharged from the water inlet 1 into the buffer tank 2, and then flows directly from the buffer tank 2 to the filter screen 5, the flocculent sludge and sewage flow into the filtrate tank 7, the nozzle starts to spray water, the granular sludge is blocked by the filter screen 5 and flows into the sludge tank 9, and finally the muddy water in the sludge tank 9 is pumped by the sludge pump 16 to the sludge treatment tank 11 for treatment.

[0025] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A granular sludge recovery device, comprising a water inlet (1), characterized in that: The water inlet (1) is connected to a buffer tank (2), the buffer tank (2) is arranged in a rectangular shape and the outlet is also arranged in a rectangular shape, the buffer tank (2) is arranged in a 304 stainless steel buffer tank, the top of the buffer tank (2) is arranged with a plurality of groups of water outlet holes (3), the bottom of the buffer tank (2) is fixedly mounted with a bracket (4), the outlet of the buffer tank (2) is fixedly mounted with a filter screen (5), the top of the filter screen (5) is arranged with a plurality of groups of nozzles (6), the bottom of the filter screen (5) is arranged with a filtrate pool (7), the bottom of the filtrate pool (7) is arranged with a water outlet pipe (8), the bottom of the filter screen (5) is fixedly arranged with a sludge pool (9), the bottom of the sludge pool (9) is connected with a sludge pipe (10), and the sludge pipe (10) is connected with a sludge treatment tank (11).

2. A granular sludge recovery device according to claim 1, characterized in that: The bottom of the buffer tank (2) is fixedly connected to a filter frame (12), the filter frame (12) is provided with a placement groove (13), and the filter (5) is detachably installed in the placement groove (13).

3. A granular sludge recovery device according to claim 2, characterized in that: The placement groove (13) and the frame of the filter screen (5) are both provided with threaded holes, and fixing bolts are threadedly installed in the threaded holes.

4. A granular sludge recovery device according to claim 3, characterized in that: The filter frame (12) is configured as an inclined 304 stainless steel filter frame, and water baffles (14) are fixedly connected to both sides of the filter frame (12), and the water baffles (14) are configured as 304 stainless steel water baffles.

5. A granular sludge recovery device according to claim 1, characterized in that: The sludge pipe (10) is provided with a solenoid valve (15), the sludge pipe (10) is connected to a sludge pump (16), and the sludge pump (16) is connected to a sludge treatment tank (11) through a pipeline.

6. A granular sludge recovery device according to claim 5, characterized in that: A water level monitor (17) is fixedly installed in the sludge pool (9), and the water level monitor (17) is signal-connected to the solenoid valve (15) and the sludge pump (16).

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