CN215403462U - Device for quickly and efficiently removing pollutants in sewage discharged from pump station - Google Patents

Device for quickly and efficiently removing pollutants in sewage discharged from pump station Download PDF

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Publication number
CN215403462U
CN215403462U CN202120502788.1U CN202120502788U CN215403462U CN 215403462 U CN215403462 U CN 215403462U CN 202120502788 U CN202120502788 U CN 202120502788U CN 215403462 U CN215403462 U CN 215403462U
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ammonia nitrogen
tank
filter
sewage
micro
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周振
袁瑶
邱冀
郗家福
支慧
江婕
明强
余司颀
胡丽丽
藏莉莉
王凯冲
安莹
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Shanghai Zizheng Environment Protection Technology Co ltd
Shanghai University of Electric Power
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Shanghai Zizheng Environment Protection Technology Co ltd
Shanghai University of Electric Power
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Abstract

The utility model relates to a device and a process for quickly and efficiently removing pollutants in sewage discharged by a pump station, wherein the process specifically comprises the following steps: (1) discharging the sewage to be treated into a coagulation tank, adding a coagulant for coagulation treatment, then discharging into a flocculation tank, and continuously adding a flocculant for flocculation treatment; (2) the sewage after flocculation treatment enters a micro-mesh filter from the lower end of a flocculation tank, particles in the sewage are intercepted and discharged into a slag storage tank, and the obtained filtrate is sent to an ammonia nitrogen adsorption unit for adsorption treatment; (3) and continuously discharging the sewage subjected to adsorption treatment into an organic matter removal unit for carrying out organic matter deep removal treatment to obtain effluent and discharging. Compared with the prior art, the utility model has the advantages of good treatment effect, easy regulation and control, capability of synchronously and efficiently removing suspended matters, organic matters and nitrogen and phosphorus pollutants, small occupied area, high starting speed, convenient starting and stopping, easy regulation and control and the like.

Description

Device for quickly and efficiently removing pollutants in sewage discharged from pump station
Technical Field
The utility model belongs to the technical field of environmental protection and sewage treatment, and relates to a device for quickly and efficiently removing pollutants in sewage discharged by a pump station.
Background
In recent years, with the improvement of environmental protection consciousness and the promulgation and implementation of related laws, point source pollution is effectively controlled basically, and most of urban production and domestic wastewater is subjected to nano-tube discharge, so that non-point source pollution becomes a main cause of urban river water quality deterioration. It is known that non-point source pollution has become the first factor of water environmental pollution in the united states, and urban rainfall runoff is the second largest non-point source of pollution next to agriculture. China also faces a serious non-point source pollution problem, the non-point source load can usually reach 35% -55% of the total pollution load, and the load of individual areas is as high as 65% -75%. Particularly in southern areas with sufficient rainfall and dense urban rivers, non-point source pollution is mostly carefree for management, and some pollution even directly becomes a ground drain pipe of a city, so that the urban water body is black and odorous, the eutrophication phenomenon is serious, and the life of residents and the environmental appearance of the whole city are influenced. In the face of the condition, the initial rainwater storage tank is produced at the same time. However, the storage and regulation tank has limited capacity, so that the initial rainwater cannot be fully collected, and the overflowing initial rainwater can cause urban inland river pollution. An on-site rapid rainwater treatment scheme is urgently needed at the rear end of the storage pond to reduce or solve the pollution of overflowing initial rainwater on the receiving water body. Therefore, the search for a fast, efficient and economical method for on-site treatment of pumping station sewage is always concerned.
The pollution reduction control technology of the pump station sewage discharge water is multiple, and the current research relatively mature measures mainly comprise rainwater regulation and storage, artificial wetland, green roof, cyclone separation, infiltration paving, sewage interception inlet, bioretention pond and the like. From the engineering point of view, the control measures are divided into source control, process control and end treatment. The source control is to change the runoff condition and increase the rainfall infiltration capacity, so that the rainfall entering the pipeline system is reduced. The process control mainly refers to the interception control of initial rainwater, namely the rainwater interception device is installed in a rainwater pipe network. The end treatment is to effectively remove pollutants by using a process before the initial rainwater is discharged into the environment so as to reduce the pollution to the water environment.
At present, the source control and the process control of pollutants are effectively realized in many cities by measures such as rain and sewage diversion, sponge city construction, drainage pipe network system synergy and the like. However, the tail end treatment of the pollution of the sewage discharged by the pump station is limited by a key technical bottleneck, and a mature and reliable technology is not available at present. Because the pumping station sewage has the characteristics of discontinuity and large water quantity and water quality fluctuation, the traditional biological treatment technology (such as a biological aerated filter) is difficult to apply, and has the defects of long starting time, difficult maintenance in the intermittent period and the like. In addition, the pumping station area is usually tight, and the hydraulic retention time requirement required by the biological treatment technology is difficult to meet. The traditional coagulating sedimentation technology can effectively control the discharge of particles and total phosphorus, but has poor removal effect on ammonia nitrogen and total nitrogen, and is difficult to control the quality of effluent water. In order to solve the problem, patent CN201910690198.3 discloses a technology with the capabilities of coagulating sedimentation and removing ammonia nitrogen, which realizes the simultaneous removal of suspended matters and ammonia nitrogen. However, the setting of the sedimentation tank after coagulation adopts a solid-liquid separation method mainly based on gravity sedimentation, so that the sedimentation tank has too long retention time and is difficult to be practically applied in a pump station area with narrow use place; meanwhile, the process is difficult to remove soluble organic matters, so that the COD of the effluent water still has a high risk.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a device for quickly and efficiently removing pollutants in sewage discharged by a pump station, which is used for synchronously and efficiently removing suspended matters, organic matters and nitrogen and phosphorus pollutants and has the advantages of small occupied area, high starting speed, convenience in starting and stopping, easiness in regulation and control and the like.
The purpose of the utility model can be realized by the following technical scheme:
one of the technical schemes of the utility model provides a device for quickly and efficiently removing pollutants in sewage discharged by a pump station, which comprises a coagulation tank, a flocculation tank, a micro-grid filter, an ammonia nitrogen adsorption unit and an organic matter removal unit which are sequentially connected along the sewage treatment direction.
Furthermore, the coagulation tank is also provided with a first stirring component and a first dosing port.
Furthermore, a second stirring component and a second medicine adding opening are further arranged on the flocculation tank.
Furthermore, the micro-grid filter is also connected with a slag storage pool.
Further, the ammonia nitrogen adsorption unit comprises ammonia nitrogen adsorption columns respectively connected with the micro-grid filter and the organic matter removal unit, an adsorption column peristaltic pump is further arranged between the ammonia nitrogen adsorption columns and the micro-grid filter, the ammonia nitrogen adsorption columns are further connected with a regeneration box through another independent circulation branch, and a regeneration pump is further arranged on the circulation branch.
Furthermore, a third dosing port is also arranged on the organic matter removing unit.
Further, the microgrid filter comprises a microgrid filter tank and filter cloth, a filter reactor inlet is formed in the upper portion of the microgrid filter tank, a filter reactor outlet connected with the ammonia nitrogen adsorption unit is further formed in the lower portion of the microgrid filter tank, the filter cloth is obliquely arranged on the microgrid filter tank through a swinging shaft and can swing back and forth left and right, and the height of the filter cloth is lower than that of the filter reactor inlet.
Furthermore, the inclination angle of the filter cloth is 0-45 degrees, and the lower end of the filter cloth is just connected with the slag storage tank, so that the intercepted flocs can slide down to the slag storage tank under the effect of the inclined swing of the filter cloth.
The second technical scheme of the utility model provides a rapid and efficient process for removing pollutants in sewage discharged by a pump station, which is implemented by adopting the device, and the process comprises the following steps:
(1) discharging the sewage to be treated into a coagulation tank, adding a coagulant for coagulation treatment, then discharging into a flocculation tank, and continuously adding a flocculant for flocculation treatment;
(2) the sewage after flocculation treatment enters a micro-mesh filter from the lower end of a flocculation tank, particles in the sewage are intercepted and discharged into a slag storage tank, and the obtained filtrate is sent to an ammonia nitrogen adsorption unit for adsorption treatment;
(3) and continuously discharging the sewage subjected to adsorption treatment into an organic matter removal unit for carrying out organic matter deep removal treatment to obtain effluent and discharging.
Furthermore, in the process of carrying out ammonia nitrogen adsorption treatment on sewage for a long time, the ammonia nitrogen adsorption unit also periodically pumps in a regeneration liquid for regeneration treatment.
Further, in the step (1), the coagulant is one or a compound of several of ferric chloride, polymeric ferric sulfate, ferrous sulfate, aluminum sulfate, polymeric aluminum chloride, polymeric aluminum ferric sulfate polysilicate, titanium salt or titanium-containing polymeric ferric sulfate, and the adding amount of the coagulant is 0.01-100 g/L;
the flocculating agent is one or a compound of more of polyacrylamide, polycarboxylic acid or quaternary ammonium salt, and the adding amount of the flocculating agent is 0.0001-100 g/L.
Furthermore, the organic matter removing unit removes organic matters through deep adsorption by adopting an adsorbent or removes organic matters through deep oxidation by adopting a chemical oxidation technology, wherein the adopted adsorbent is activated carbon or activated coke, and a chemical oxidation reagent adopted by the chemical oxidation technology is sodium hypochlorite or ozone.
Compared with the prior art, the utility model has the following advantages:
(1) the coagulation-filtration-adsorption regeneration process is adopted, so that the suspended matters, total phosphorus, organic matters, ammonia nitrogen and total nitrogen are quickly and efficiently removed, and the nitrogen and phosphorus indexes of the effluent can reach the IV water standard of the environmental quality Standard of surface Water (GB 3838-2002);
(2) the full process adopts a physicochemical treatment technology, has the advantages of high starting speed, no need of microbial acclimation and timely response, and is more suitable for pump station sewage discharged irregularly and intermittently compared with a biological treatment technology;
(3) the micro-mesh filter is adopted to treat the flocculated sewage to replace the traditional sedimentation tank, so that the floor area is reduced by more than 70% compared with that of a sedimentation process; the coagulation dosing point is moved upwards into a drainage pipeline, the pipeline is used as a medicament mixing reactor, the occupied area is further reduced, and the overall process design is particularly suitable for a pump station area with short land.
(4) The microgrid filter adopts the operation of automatically cleaning filtration mode, effectively controls the pollution when suspension particulate matter is got rid of to the high efficiency, avoids the filter cloth to block up, has improved filtration efficiency.
(5) Through the series connection of the micro-mesh filter and the ammonia nitrogen adsorption unit, the filtering capacity of the ammonia nitrogen adsorption material with small particle size is utilized to realize the deep removal of particles;
(6) strategies such as back washing, salt activation, oxidation regeneration and the like are organically coupled in the ammonia nitrogen adsorption unit, so that the blockage problem caused by the growth of influent particles and a biological film is effectively avoided while the ammonia nitrogen adsorption regeneration is circularly operated.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a pilot-scale operation effect diagram of the treatment of pump station sewage of embodiment 2;
fig. 3 is a top view of a microfilter;
fig. 4 is a front view of a microfilter.
The notation in the figure is:
1-a coagulation tank, 2-a flocculation tank, 3-a micro-mesh filter, 31-a filter reactor inlet, 32-filter cloth, 33-a micro-mesh filter tank, 34-a filter reactor outlet, 4-an ammonia nitrogen adsorption column, 5-a regeneration tank, 6-a first stirring component, 7-a second stirring component, 8-a first dosing port, 9-a second dosing port, 10-a slag storage tank, 11-an adsorption column peristaltic pump, 12-a regeneration pump, 13-an adsorption column outlet water, 14-an organic matter removal unit, 15-a third dosing port and 16-device outlet water.
Detailed Description
The utility model is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
The rapid and efficient removing device for the pollutants in the sewage discharged by the pump station is firstly analyzed and explained below.
The device for quickly and efficiently removing the pollutants in the sewage discharged by the pump station, disclosed by the utility model, is shown in figure 1 and comprises a coagulation tank 1, a flocculation tank 2, a micro-grid filter 3, an ammonia nitrogen adsorption unit and an organic matter removal unit 14 which are sequentially connected along the sewage treatment direction.
In some embodiments, referring to fig. 1 again, the coagulation basin 1 is further provided with a first stirring assembly 6 and a first dosing port 8. The first stirring component 6 is a conventional device capable of realizing a stirring function, and in addition, the first dosing port 8 is used for dosing a coagulant.
In some embodiments, referring to fig. 1 again, the flocculation tank 2 is further provided with a second stirring component 7 and a second dosing port 9. In the same way, the second stirring component 7 only needs to adopt conventional equipment devices capable of realizing the stirring function, and in addition, the second dosing port 9 is used for dosing the flocculating agent.
In some embodiments, referring to fig. 1 again, the micro mesh filter 3 is further connected to a residue storage tank 10, and the filtered residue can be discharged into the residue storage tank 10.
In some embodiments, please refer to fig. 1 again, the ammonia nitrogen adsorption unit includes an ammonia nitrogen adsorption column 4 connected to the micro-grid filter 3 and the organic matter removal unit 14, respectively, and the ammonia nitrogen adsorption column 4 is further connected to the regeneration box 5 through another independent circulation branch. More specifically, an adsorption column peristaltic pump 11 is further arranged between the ammonia nitrogen adsorption column 4 and the micro-mesh filter 3. Meanwhile, a regeneration pump 12 may be provided in the circulation branch.
In some embodiments, referring to fig. 1 again, a third dosing port 15 is further disposed on the organic matter removing unit 14, and the third dosing port 15 is mainly used for dosing a reagent capable of deeply removing organic matters, such as an oxidizing reagent such as sodium hypochlorite.
The following is an analysis and explanation of the rapid and efficient removal process of the pump station sewage pollutants using any of the above devices according to the present invention.
The utility model also provides a process for quickly and efficiently removing the pollutants in the sewage discharged by the pump station, and please refer to fig. 1, wherein the process comprises the following steps:
(1) discharging the sewage to be treated into a coagulation tank 1, adding a coagulant for coagulation treatment, then discharging into a flocculation tank 2, and continuously adding a flocculant for flocculation treatment;
(2) the sewage after flocculation treatment enters a micro-mesh filter 3 from the lower end of a flocculation tank 2, particulate matters in the sewage are intercepted and discharged into a slag storage tank 10, and the obtained filtrate is sent into an ammonia nitrogen adsorption unit for adsorption treatment;
(3) the sewage after the adsorption treatment is continuously discharged into the organic matter removing unit 14 for the organic matter deep removal treatment, and the obtained effluent is discharged.
In some embodiments, the ammonia nitrogen adsorption unit also periodically pumps a regeneration liquid for regeneration treatment in the process of carrying out ammonia nitrogen adsorption treatment on the sewage for a long time. Preferably, the effective component contained in the regeneration liquid is the compound of salt and an oxidant, wherein the salt is potassium salt, sodium salt, calcium salt, magnesium salt, aluminum salt, iron salt or zinc salt, and the concentration of the salt is 1-90 g/L; the oxidant is hydrogen peroxide, perchlorate, permanganate, dichromate, sodium peroxide, hypochlorite or ozone or nitric acid, the dosage of the oxidant is 0.8-1.8 times of the reaction molar ratio of the oxidant and ammonia nitrogen, the specific dosage is determined according to the ammonia nitrogen adsorption amount of zeolite and the addition amount of zeolite, and the preferred concentration range is 0.01-20.00 g/L.
In some embodiments, in the step (1), the coagulant is one or more of ferric chloride, polyferric sulfate, ferrous sulfate, aluminum sulfate, polyaluminum chloride, polyaluminum sulfochloride, polyaluminum ferric chloride, polyaluminum ferric sulfate polysilicate, titanium salt or titanium-containing polyferric sulfate, and the addition amount is 0.01 to 100 g/L.
In some embodiments, the flocculant is one or a compound of polyacrylamide, polycarboxylic acid or quaternary ammonium salt, and the dosage of the flocculant is 0.0001-100 g/L.
In some embodiments, the mixing speed of the coagulation treatment is 100-500rpm, and the hydraulic retention time of the coagulation basin 1 is 20-300 s. In addition, the stirring speed of the flocculation treatment is 20-200 rpm, and the hydraulic retention time is 1-10 min.
In some embodiments, the detailed structure of the micro-mesh filter 3 is shown in fig. 3 and 4, which comprises a micro-mesh filter tank 33, a filter cloth 32 and the like, a filtering reactor inlet 31 is arranged above the micro-grid filtering tank 33, a filtering reactor outlet 34 connected with the ammonia nitrogen adsorption unit is also arranged at the lower part of the micro-grid filtering tank, and simultaneously, the micro-grid filter tank 33 is also provided with a filter cloth 32 which is lower than the inlet 31 of the filter reactor, the filter cloth 32 is arranged on the micro-grid filter tank 33 through a swinging shaft, can swing back and forth left and right (the swinging process can be realized by connecting the swinging shaft with the existing swinging equipment), is arranged in an inclined state, the inclination angle is 0-45 degrees (not equal to 0, when 0, it means horizontal), and the lower end of the filter cloth 32 is just connected with the slag storage tank 10, so that the intercepted floc falls off the slag storage tank 10 under the effect of the inclined swing of the filter cloth 32.
In some embodiments, the grain size of the adsorption material used by the ammonia nitrogen adsorption column 4 in the ammonia nitrogen adsorption unit is 0.1-10mm, and the hydraulic retention time of the ammonia nitrogen adsorption column 4 is 0.5-24 h.
In some embodiments, the organic removal unit 14 removes organic matters by deep adsorption with an adsorbent, or removes organic matters by deep oxidation with a chemical oxidation technology, where the adsorbent is activated carbon or activated coke, and the chemical oxidation reagent is sodium hypochlorite or ozone.
The working principle of the utility model is specifically as follows:
(1) the sewage is fed into the water inlet pipe by the water inlet pump, the coagulant is added by the adding port arranged at the upper part of the water inlet pipe, the added coagulant is converged with the sewage in the water inlet pipe, so that the coagulant and the sewage are uniformly mixed, the mixed sewage enters the coagulation tank 1, the coagulant and the sewage are further mixed under the action of the stirring device in the coagulation tank 1, and the coagulant is rapidly diffused to the whole tank body so as to be hydrolyzed, adsorbed, bridged and meshed. The coagulated sewage enters a flocculation tank 2 from the outlet of a coagulation tank 1, and is fully mixed with a flocculating agent under the action of a mechanical stirring device of the flocculation tank 2, so that a flocculating body is quickly formed and grows; the effluent of the flocculation tank 2 enters the micro-mesh filter 3 through an outlet at the lower end of the flocculation tank 2, the filter cloth effectively intercepts flocs by utilizing the sizes of the flocs and the filter cloth meshes, and meanwhile, the intercepted flocs slide down to the slag storage tank 10 under the action of the inclination of the filter cloth. The coagulation tank 1 provided by the utility model has the main functions of realizing the mixing and diffusion of a coagulation medicament and a water body so as to reduce the Zeta potential of the water body as soon as possible to enable colloidal particles to be mutually aggregated, then further realize the formation and growth of flocs through the flocculation tank 2, and finally enter the micro-mesh filter 3 to determine the mesh number of filter cloth according to the increased size of the flocs, thereby realizing the effective separation of the flocs and water.
(2) Filtrate received by the micro-grid filter 3 is sent to the bottom of the adsorption column through a peristaltic pump, ammonia nitrogen in sewage is adsorbed and removed under the ammonia nitrogen adsorption and ion exchange effects of the adsorption material, and water treated by the adsorption column is discharged from the upper end of the adsorption column. The ammonia nitrogen adsorption column 4 is periodically regenerated by using the regenerated liquid in the regeneration box 5 in a circulating way, and the ammonia nitrogen in the regenerated liquid can be removed by sodium hypochlorite oxidation, shortcut nitrification-anaerobic ammonia oxidation, stripping and the like, so that the cyclic utilization of the adsorption material is realized.
(3) The effluent discharged from the upper end of the ammonia nitrogen adsorption column 4 can be treated by removing soluble organic matters in the organic matter removing unit 14 by methods such as active coke and sodium hypochlorite.
The above embodiments will be described in more detail with reference to specific examples.
Example 1
The embodiment provides a process for quickly and efficiently removing pollutants in sewage discharged from a pump station, the process flow of which is shown in fig. 1, and main equipment comprises a coagulation tank 1, a flocculation tank 2, a micro-grid filter 3, an ammonia nitrogen adsorption column 4, a slag storage tank 10, a regeneration box 5, an organic matter removal unit 14 and the like.
The technology for rapidly and efficiently removing the pollutants in the sewage discharged from the pump station of the embodiment comprises the following steps:
the wastewater to be treated is sent into a coagulation tank 1 through a water inlet pump, and the upper part of the coagulation tank 1 is provided with a first coagulant feeding port for feeding coagulant; the coagulant and the wastewater are fully mixed in the coagulation tank 1 and are rapidly mixed with the wastewater under the action of the first stirring assembly 6 in the coagulation tank 1. Then the wastewater enters a flocculation tank 2 through a water outlet hole at the upper part of the coagulation tank 1, and a second dosing port for dosing a flocculating agent is arranged at the upper part of the flocculation tank 2; the flocculating agent and the wastewater are fully mixed in the flocculation tank 2, and the flocculating agent and the raw water suspended matters and the colloid are subjected to flocculation reaction under the action of a second stirring assembly 7 in the flocculation tank 2 to form flocs and grow further. And then, the wastewater enters a micro-mesh filter 3 through an outlet at the lower part of the flocculation tank 2, a filtrate is pumped into the bottom of an ammonia nitrogen adsorption column 4 through an adsorption column peristaltic pump 11 under the interception action of filter cloth in the micro-mesh filter 3, ammonia nitrogen in the wastewater is removed by using an adsorption material, and a regeneration stage is carried out when the ammonia nitrogen in the effluent 13 of the adsorption column is close to the emission standard requirement. When the ammonia nitrogen adsorption column 4 is regenerated, the medicament in the regeneration box 5 is pumped into the ammonia nitrogen adsorption column 4 to desorb and regenerate the adsorption material, and the desorbed ammonia nitrogen is converted into nitrogen. After the stage is finished, the ammonia nitrogen adsorption column 4 is filled with water again, and the regenerated liquid flows back to the regenerated liquid tank. Wherein, the ammonia nitrogen adsorption columns 4 need to be arranged in parallel, a single adsorption column is switched into a regeneration stage after penetrating, and the inlet water is switched to another ammonia nitrogen adsorption column 4 to continue to operate. And the effluent 13 of the adsorption column treated by the ammonia nitrogen adsorption column 4 is discharged into an organic matter removal unit 14 for deep removal of organic matters, and the obtained device effluent 16 is discharged.
Example 2
Referring to figure 1, the SS concentration of the inlet water of the sewage discharged from a certain pumping station is 485.37 +/-12.59 mg/L, the ammonia nitrogen concentration is 18.26 +/-0.64 mg/L, and the total phosphorus concentration is 4.03 +/-0.33 mg/L, COD and is 309.57 +/-67.68 mg/L. The process route of example 1 was followed, the amount of water treated being 36m3The coagulation tank 1 is 25L, the flocculation tank 2 is 100L, and the micro-mesh filter 3 is 100L; the ammonia nitrogen adsorption column 4 is 40, the volume of the ammonia nitrogen adsorption column 4 is 4.77L, the effective volume is 2.54L, and the volume of the regeneration box 5 is 12L; the organic matter is removed by a sodium hypochlorite oxidation unit with the volume of 100L. After the treatment by the technology of the embodiment 1, the removal rates of ammonia nitrogen, total phosphorus and COD respectively reach 94.54 +/-2.20%, 94.51 +/-1.53% and 82.47 +/-4.21%.
In the coagulation and filtration process of the embodiment, the coagulant used is 0.18g/L of aluminum sulfate, the flocculant is 0.85mg/L of polyacrylamide, the stirring speed of coagulation treatment is 250rpm, the hydraulic retention time is 1min, the stirring speed of flocculation treatment is 80rpm, and the hydraulic retention time is 4 min. The filter cloth is made of steel wire and has 400 meshes.
The ammonia nitrogen adsorption material used by the ammonia nitrogen adsorption unit is zeolite with the particle size of 3-5 mm, the HRT is 30min, and the regeneration liquid is a mixed liquid of NaClO with the concentration of 0.5mol/L and NaCl with the concentration of 20.0g/L (calculated by sodium).
Aiming at the phenomenon that COD of the effluent of the ammonia nitrogen adsorption column 4 is high, the organic matter removing unit 14 adopts a sodium hypochlorite solution with the mass fraction of 7.5% to oxidize the effluent COD to be lower than 30mg/L, wherein BOD5The concentration is reduced from 12mg/L to below 10 mg/L.
Example 3
The SS concentration of the inlet water of the sewage discharged from a certain pumping station is 485.37 +/-12.59 mg/L, the ammonia nitrogen concentration is 18.26 +/-0.64 mg/L, and the total phosphorus concentration is 4.03 +/-0.33 mg/L, COD and is 309.57 +/-67.68 mg/L. The adopted process route is as follows: compared to example 2, most of them were identical except that the microfilter was omitted. The treated water amount is 36m3The coagulation tank 1 is 25L, the flocculation tank 2 is 100L, and the micro-mesh filter 3 is 100L; the ammonia nitrogen adsorption column 4 is 40, the volume of the ammonia nitrogen adsorption column 4 is 4.77L, the effective volume is 2.54L, and the volume of the regeneration box 5 is 12L; the organic matter is removed by a sodium hypochlorite oxidation unit with the volume of 100L. After the technical treatment of the embodiment 3, the removal rates of ammonia nitrogen, total phosphorus and COD respectively reach 88.23 +/-2.50%, 64.51 +/-1.46% and 62.47 +/-2.89%.
In the coagulation and filtration process of the embodiment, the coagulant used is 0.20g/L ferric chloride, the flocculant is 0.80mg/L polyacrylamide, the stirring speed of coagulation treatment is 250rpm, and the hydraulic retention time is 1 min. The stirring speed of the flocculation treatment was 80rpm, and the hydraulic retention time was 5 min. The filter cloth is made of nylon net with 300 meshes.
The ammonia nitrogen adsorption material used by the ammonia nitrogen adsorption unit is zeolite with the particle size of 3-5 mm, the HRT is 10min, and the regeneration liquid is a mixed liquid of 25.0g/L (calculated by sodium) NaCl and 10g/L (calculated by potassium) KCl.
The organic matter removing unit 14 is used for oxidizing the COD of the effluent of the ammonia nitrogen adsorption column 4 to a COD lower than 30mg/L and a BOD (biochemical oxygen demand) by using an ozone generator aiming at the phenomenon that the COD of the effluent is high5Less than 10 mg/L.
Example 4
The SS concentration of the inlet water of the sewage discharged from a certain pumping station is 485.37 +/-12.59 mg/L, the ammonia nitrogen concentration is 18.26 +/-0.64 mg/L, and the total phosphorus concentration is 4.03 +/-0.33 mg/L, COD and is 309.57 +/-67.68 mg/L. The adopted process route is as follows: compared with the embodiment 2, the micro-mesh filter is mostly the same, except that the micro-mesh filter adopts 201910690198.3 inclined plate sedimentation tank. The treated water amount is 36m3The coagulation tank 1 is 25L, the flocculation tank 2 is 100L, and the micro-mesh filter 3 is 100L; the ammonia nitrogen adsorption column 4 has 40 ammonia nitrogen adsorption columns, the volume of the ammonia nitrogen adsorption column 4 is 4.77L, the effective volume is 2.54L, and the regeneration box5 has a volume of 12L; the organic matter is removed by a sodium hypochlorite oxidation unit with the volume of 100L. After the treatment by the technology of the embodiment 4, the removal rates of ammonia nitrogen, total phosphorus and COD respectively reach 93.35 +/-2.10%, 92.45 +/-2.43% and 80.58 +/-3.16%. The quality of the outlet water can meet the requirements of IV-class water of surface water environmental quality standard (GB 3838-2002).
In the coagulation and filtration process of the embodiment, the coagulant used is 0.65g/L of polysilicate aluminum ferric sulfate, the flocculant is 0.85mg/L of polyacrylamide, the stirring speed of coagulation treatment is 300rpm, and the hydraulic retention time is 1 min. The stirring speed of the flocculation treatment was 90rpm, and the hydraulic retention time was 6 min. The filter cloth is made of nylon net with 300 meshes.
The ammonia nitrogen adsorbing material used by the ammonia nitrogen adsorbing unit is a molecular sieve with the particle size of 3-5 mm, the HRT is 60min, and the regeneration liquid adopts 25.0g/L (calculated by sodium) NaCl and 10g/L CaCl2(calculated as calcium) of the mixture.
The organic matter removing unit 14 is used for oxidizing the COD of the effluent of the ammonia nitrogen adsorption column 4 by sodium hypochlorite until the COD of the effluent is lower than 25mg/L and BOD5Less than 8 mg/L.
In the above embodiments, the raw material reagents or the operating process conditions used may be arbitrarily adjusted within the following ranges according to actual conditions:
the regeneration liquid contains effective components of salt and oxidant, wherein the salt is potassium salt, sodium salt, calcium salt, magnesium salt, aluminum salt, iron salt or zinc salt, and the concentration of the salt is 1-90 g/L; the oxidant is hydrogen peroxide, perchlorate, permanganate, dichromate, sodium peroxide, hypochlorite or ozone or nitric acid, the dosage of the oxidant is 0.8-1.8 times of the reaction molar ratio of the oxidant and ammonia nitrogen, the specific dosage is determined according to the ammonia nitrogen adsorption amount of zeolite and the addition amount of zeolite, and the preferred concentration range is 0.01-20.00 g/L;
the coagulant is one or a compound of more of ferric chloride, polymeric ferric sulfate, ferrous sulfate, aluminum sulfate, polymeric aluminum chloride, polymeric aluminum ferric sulfate silicate, titanium salt or titanium-containing polymeric ferric sulfate, and the adding amount of the coagulant is 0.01-100 g/L;
the flocculating agent is one or a compound of more of polyacrylamide, polycarboxylic acid or quaternary ammonium salt, and the adding amount of the flocculating agent is 0.0001-100 g/L;
the stirring speed of the coagulation treatment is 100-500rpm, the hydraulic retention time of the coagulation tank is 20-300 s, and in addition, the stirring speed of the flocculation treatment is 20-200 rpm, and the hydraulic retention time is 1-10 min;
the grain diameter of the adsorbing material used by the ammonia nitrogen adsorption column in the ammonia nitrogen adsorption unit is 0.1-10mm, and the hydraulic retention time of the ammonia nitrogen adsorption column is 0.5-24 h.
The embodiments described above are intended to facilitate the understanding and use of the utility model by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims (10)

1. The utility model provides a quick high-efficient remove device of pump station blow off water pollutant which characterized in that includes coagulation basin, flocculation basin, microgrid filter, ammonia nitrogen adsorption unit and the organic matter removal unit that connects gradually along the sewage treatment direction.
2. The device for quickly and efficiently removing pollutants in sewage discharged from the pump station according to claim 1, wherein the coagulation tank is further provided with a first stirring assembly and a first chemical adding port.
3. The device for quickly and efficiently removing the pollutants in the sewage discharged by the pump station according to claim 1, wherein a second stirring component and a second chemical adding port are further arranged on the flocculation tank.
4. The device for quickly and efficiently removing pollutants in sewage discharged from pump stations according to claim 1, wherein the micro-mesh filter is further connected with a slag storage pool.
5. The device for quickly and efficiently removing pollutants in sewage discharged from pump stations according to claim 1, wherein the ammonia nitrogen adsorption unit comprises an ammonia nitrogen adsorption column which is respectively connected with the micro-grid filter and the organic matter removal unit, and the ammonia nitrogen adsorption column is also connected with the regeneration box through another independent circulation branch.
6. The device for quickly and efficiently removing pollutants in sewage discharged from pump stations according to claim 5, wherein an adsorption column peristaltic pump is further arranged between the ammonia nitrogen adsorption column and the micro-mesh filter.
7. The device for quickly and efficiently removing the pollutants in the sewage discharged by the pump station according to claim 5, wherein a regeneration pump is further arranged on the circulating branch.
8. The device for quickly and efficiently removing the pollutants in the sewage discharged by the pump station according to claim 1, wherein a third chemical adding port is further arranged on the organic matter removing unit.
9. The device for quickly and efficiently removing pollutants in sewage discharged from pump stations according to claim 1, wherein the micro-grid filter comprises a micro-grid filter tank and filter cloth, a filter reactor inlet is formed in the upper portion of the micro-grid filter tank, a filter reactor outlet connected with the ammonia nitrogen adsorption unit is further formed in the lower portion of the micro-grid filter tank, the filter cloth is obliquely arranged on the micro-grid filter tank through a swing shaft and can swing left and right back and forth, and the height of the filter cloth is lower than the inlet of the filter reactor.
10. The device for quickly and efficiently removing pollutants in sewage discharged from pump stations according to claim 9, wherein the inclination angle of the filter cloth is 0-45 degrees, and the lower end of the filter cloth is just connected with the slag storage tank, so that the intercepted flocs fall into the slag storage tank under the action of the inclined swing of the filter cloth.
CN202120502788.1U 2021-03-10 2021-03-10 Device for quickly and efficiently removing pollutants in sewage discharged from pump station Active CN215403462U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112939285A (en) * 2021-03-10 2021-06-11 上海电力大学 Device and process for quickly and efficiently removing pollutants in sewage discharged from pump station

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112939285A (en) * 2021-03-10 2021-06-11 上海电力大学 Device and process for quickly and efficiently removing pollutants in sewage discharged from pump station

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