Novel sewage treatment process

Abstract

The invention provides a novel sewage treatment process which comprises the following steps: 1, pumping sewage into a sewage tank through a water pump, stirring, adding a flocculating agent into the sewage tank, and stirring through a stirring mechanism of the sewage tank; 2, sewage treated in the sewage tank automatically flows into a filter tank to be filtered; 3, the filtered sewage flows into a standing box, after standing, supernate is sucked into a purification box, a phosphorus removal agent is added into the purification box, stirring is conducted for a period of time, then the sewage is input into an anaerobic reactor for reaction, water is discharged, and a disinfectant is added to reach the standard. According to the sewage treatment technology, impurities in the sewage can be efficiently removed, and safe discharging is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a novel sewage treatment process. Background Art

[0002] Sewage refers to polluted water from domestic and industrial sources. Water that has lost its original function is simply called sewage. Directly discharging untreated sewage can easily pollute the environment. While there are many sewage treatment methods available, many are costly and complex.

[0003] To this end, we proposed a new sewage treatment process to solve the problem. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the present invention provides a new sewage treatment process, which adopts the following technical solution: Step 1: Sewage is pumped into a sewage tank by a water pump for stirring, flocculant is added to the sewage tank, and stirring is carried out by a stirring mechanism of the sewage tank;

[0005] Step 2: The treated sewage in the sewage tank flows to the filter box for filtration;

[0006] Step 3: The filtered sewage flows to the settling tank. After settling, the supernatant is pumped to the purification tank. The phosphorus removal agent is added to the purification tank and stirred for a period of time. Then, the reaction water is input into the anaerobic reactor and disinfectant is added to meet the standards.

[0007] Furthermore, the flocculant is polyaluminium chloride PAC solution or polyacrylamide PAM solution.

[0008] Furthermore, the phosphorus removal agent includes the following weight ratios: 50-100 parts of potassium sulfate dodecahydrate, 1-5 parts of carboxypropyl methylcellulose, and 0.5-2 parts of polyacrylic acid.

[0009] Furthermore, the disinfectant is chlorine dioxide.

[0010] Furthermore, the sewage tank includes a tank body, in which a stirring mechanism is provided, the stirring mechanism includes a rotating rod mounted in the tank body, a plurality of stirring blades are provided on the rotating rod, one end of the rotating rod extends out of the outer wall of the sewage tank and is connected to the output end of the stirring motor, a water inlet is provided at the upper end of the sewage tank, and a support rod is hinged at one end of the sewage tank, and a hydraulic cylinder is hinged at the other end of the sewage tank.

[0011] Furthermore, a vibration filtering device is provided in the filter box, and the vibration filtering device includes a first filter screen mounted in the filter box, one end of the first filter screen is in contact with the protective frame, and the part of the first filter screen located in the protective frame is fixedly connected to the upper end of the spring, and the lower end of the spring is fixedly connected to the movable plate, and the movable plate is in contact with the cam, and the center of the cam is connected to the output end of the first motor arranged on the outer wall of the filter box through a rotating shaft.

[0012] Furthermore, the purification box includes a box body, a second motor is provided at the upper end of the box body, the output end of the second motor is connected to the center rod extending into the box body, a plurality of stirring rods are provided along the center array at the bottom end of the center rod, the stirring rods are arranged at an angle, and one end thereof is fixed to the bottom end of the center rod, and the other end contacts and connects to the inner wall of the box body, a valve is provided at the lower end of the purification box, and a second filter is provided at the valve.

[0013] Furthermore, after adding the dephosphorizing agent in step 3, the stirring time is 45 minutes and the stirring speed is 150 r / min.

[0014] Beneficial effects

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The sewage treatment process provided by the present invention provides a sewage tank with a stirring mechanism inside to add flocculants for sufficient stirring, so that sewage impurities are quickly condensed into particles. The support rod and hydraulic cylinder hinged at the lower end of the sewage tank enable the flocculated sewage to flow by gravity to the filter box for vibration filtration, and the vibration filtration can prevent particles from clogging the filter screen.

[0017] 2. The sewage treatment process provided by the present invention can efficiently remove harmful substances from the flocculated sewage by adding a phosphorus removal agent and stirring it in the purification box. Finally, it is filtered and input into the anaerobic reactor for reaction, and a disinfectant is added to the effluent to meet the standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described in detail below with reference to the accompanying drawings.

[0019] Figure 1 A diagram showing the connection between devices for a treatment process according to an embodiment of the present invention;

[0020] Figure 2 According to the processing method of the embodiment of the present invention Figure 1 A magnified view of middle A;

[0021] Figure 3 Schematic diagram of the structure of an anaerobic reactor according to a treatment process of an embodiment of the present invention.

[0022] Reference numerals:

[0023] Sewage tank 1, rotating rod 2, stirring blade 3, stirring motor 4, hydraulic cylinder 5, support rod 6, first filter 7, spring 8, movable plate 9, cam 10, first motor 11, second motor 12, center rod 13, stirring rod 14, second filter 15, stilling box 16, purification box 17, filter box 18, anaerobic reactor 19, mixing zone 20, first anaerobic zone 21, gas-liquid separation zone 22, second anaerobic zone 23, sedimentation zone 24. DETAILED DESCRIPTION

[0024] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0025] Reference Figures 1 to 3 , according to the embodiment of the present invention, a novel sewage treatment process is provided, which adopts the following technical scheme: Step 1: Sewage is pumped into a sewage tank 1 by a water pump for stirring, a flocculant polyaluminium chloride PAC solution is added into the sewage tank 1, and a stirring process is performed by a stirring mechanism of the sewage tank 1;

[0026] Step 2: The treated sewage in the sewage tank 1 flows to the filter box 18 for filtration;

[0027] Step 3: The filtered sewage flows to the settling tank 16. After settling, the supernatant is pumped to the purification tank 17. A dephosphorizing agent is added to the purification tank 17 and stirred for a period of time. The resulting water is then fed into the anaerobic reactor 19 for reaction and disinfectant is added to meet the standards.

[0028] Furthermore, the phosphorus removal agent includes the following weight ratio: 70 parts of potassium sulfate dodecahydrate, 2 parts of carboxypropyl methylcellulose, and 1 part of polyacrylic acid.

[0029] Furthermore, the sewage tank 1 includes a box body, in which a stirring mechanism is provided. The stirring mechanism includes a rotating rod 2 mounted in the box body, and a plurality of stirring blades 3 are provided on the rotating rod 2. One end of the rotating rod 2 extends out of the outer wall of the sewage tank 1 and is connected to the output end of the stirring motor 4. A water inlet is provided at the upper end of the sewage tank 1, and a support rod 6 is hinged at one end of the sewage tank 1, and a hydraulic cylinder 5 is hinged at the other end of the sewage tank 1; after stirring, the hydraulic cylinder 5 is lowered to tilt one end of the sewage tank 1, so that the flocculated sewage flows to the filter box 18 by itself.

[0030] Furthermore, a vibration filtering device is provided in the filter box 18, and the vibration filtering device includes a first filter screen 7 mounted in the filter box 18, one end of the first filter screen 7 contacts and connects to the protective frame, and the first filter screen 7 is located in the protective frame. The upper end of the spring 8 is fixedly connected to the upper end of the spring 8, and the lower end of the spring 8 is fixedly connected to the movable plate 9. The movable plate 9 contacts and connects to the cam 10, and the center of the cam 10 is connected to the output end of the first motor 11 provided on the outer wall of the filter box 18 through a rotating shaft; the cam 10 is driven to rotate by the first motor 11, and the movable plate 9 contacts the movable plate 9 at intervals on the cam 10. The movable plate 9 compresses the spring 8, so that the spring 8 pushes the first filter screen 7, thereby causing the first filter screen 7 to vibrate and filter to prevent particles formed after flocculation from the sewage tank 1 from clogging the first filter screen 7.

[0031] Furthermore, the purification box 17 includes a box body, a second motor 12 is provided at the upper end of the box body, the output end of the second motor 12 is connected to the center rod 13 extending into the box body, and a plurality of stirring rods 14 are provided at the bottom end of the center rod 13 along the center array. The stirring rods 14 are inclined, and one end is fixed to the bottom end of the center rod 13, and the other end is in contact with the inner wall of the box body. A valve is provided at the lower end of the purification box 17, and a second filter 15 is provided at the valve. The center rod 13 and the stirring rod 14 are driven by the second motor 12 to rotate and stir. The stirring rod 14 stirs the sewage from the bottom to form a vortex. In the continuous vortex, the sewage fully reacts with the dephosphorization agent and the disinfectant to remove harmful substances. Finally, the sewage is filtered through the second filter 15 and input into the anaerobic reactor for reaction and water discharge.

[0032] Furthermore, after adding the dephosphorus removal agent in step 3, the stirring time is 45 minutes and the stirring speed is 150 r / min. Under the action of time and stirring speed, the dephosphorus removal agent can be evenly dispersed in the sewage and fully contact and react with the impurity molecules in the sewage to remove them.

[0033] Furthermore, the anaerobic reactor 19 includes a mixing zone 20 , a first anaerobic zone 21 , a gas-liquid separation zone 22 , a second anaerobic zone 23 and a sedimentation zone 24 .

[0034] Mixing zone 20: The water from the bottom of the reactor, the granular sludge and the mud-water mixture refluxed from the gas-liquid separation zone are effectively mixed in this zone.

[0035] First anaerobic zone 21: The sludge-water mixture formed in the mixing zone enters this zone. Under the action of the high-concentration sludge, most of the organic matter is converted into biogas. The upward flow of the mixed liquid and the intense disturbance of the biogas cause the sludge in this reaction zone to expand and fluidize, enhancing the surface contact between the sludge and water, thereby maintaining high sludge activity. As biogas production increases, a portion of the sludge-water mixture is lifted by the biogas to the gas-liquid separation zone at the top.

[0036] Gas-liquid separation zone 22: The biogas in the lifted mixture is separated from the mud and water here and discharged to the treatment system. The mud and water mixture returns to the mixing zone at the bottom along the reflux pipe and is fully mixed with the sludge and influent at the bottom of the reactor, thus realizing the internal circulation of the mixed liquid.

[0037] Second anaerobic zone 23: After treatment in the first anaerobic zone, the wastewater, with some being lifted by biogas, flows through a three-phase separator into the second anaerobic zone. Sludge concentration in this zone is low, and most organic matter in the wastewater has already been degraded in the first anaerobic zone, resulting in low biogas production. Biogas is introduced into the gas-liquid separation zone via a biogas pipe, minimally disturbing the second anaerobic zone and providing favorable conditions for sludge retention.

[0038] Sedimentation zone 24: The mud-water mixture in the second anaerobic zone undergoes solid-liquid separation in the sedimentation zone, the supernatant is discharged from the outlet pipe, and the precipitated granular sludge returns to the sludge bed of the second anaerobic zone.

[0039] From the working principle of the anaerobic reactor, it can be seen that the reactor achieves SRT>HRT through a two-layer three-phase separator to obtain a high sludge concentration; through a large amount of biogas and violent disturbance of the internal circulation, the sludge and water are fully in contact, achieving a good mass transfer effect.

[0040] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A new sewage treatment process, characterized by: The method comprises the steps of: pumping sewage into a sewage tank through a water pump for stirring, adding flocculant into the sewage tank, and stirring the sewage tank through a stirring mechanism; Step 2: The treated sewage in the sewage tank flows to the filter box for filtration; Step 3: The filtered sewage flows to the settling tank. After settling, the supernatant is pumped to the purification tank. The phosphorus removal agent is added to the purification tank and stirred for a period of time. Then, the reaction water is input into the anaerobic reactor and disinfectant is added to meet the standards.

2. The novel sewage treatment process according to claim 1, characterized in that: The flocculant is polyaluminium chloride PAC solution or polyacrylamide PAM solution.

3. The novel sewage treatment process according to claim 1, characterized in that: The phosphorus removal agent comprises the following proportions by weight: 50-100 parts of potassium sulfate dodecahydrate, 1-5 parts of carboxypropyl methylcellulose, and 0.5-2 parts of polyacrylic acid.

4. The novel sewage treatment process according to claim 1, characterized in that: The disinfectant is chlorine dioxide.

5. The novel sewage treatment process according to claim 1, characterized in that: The sewage tank includes a tank body, in which a stirring mechanism is provided. The stirring mechanism includes a rotating rod mounted in the tank body, on which a plurality of stirring blades are provided. One end of the rotating rod extends out of the outer wall of the sewage tank and is connected to the output end of the stirring motor. A water inlet is provided at the upper end of the sewage tank, and a support rod is hingedly connected to one end of the sewage tank, and a hydraulic cylinder is hingedly connected to the other end of the sewage tank.

6. The novel sewage treatment process according to claim 1, characterized in that: A vibration filtering device is provided in the filter box, and the vibration filtering device includes a first filter screen mounted in the filter box, one end of the first filter screen is in contact with the protective frame, and the part of the first filter screen located in the protective frame is fixedly connected to the upper end of the spring, and the lower end of the spring is fixedly connected to the movable plate, and the movable plate is in contact with the cam, and the center of the cam is connected to the output end of the first motor arranged on the outer wall of the filter box through a rotating shaft.

7. The novel sewage treatment process according to claim 1, characterized in that: The purification box includes a box body, a second motor is provided at the upper end of the box body, the output end of the second motor is connected to the center rod extending into the box body, a plurality of stirring rods are provided at the bottom end of the center rod along the center array, the stirring rods are arranged at an angle, and one end thereof is fixed to the bottom end of the center rod, and the other end contacts and connects to the inner wall of the box body, a valve is provided at the lower end of the purification box, and a second filter is provided at the valve.

8. The novel sewage treatment process according to claim 1 is characterized in that: After adding the dephosphorizing agent in step 3, the stirring time is 45 minutes, and the stirring speed is 150 r / min.

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