Sewage purification system

[0020] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described clearly and completely below. Obviously, the described embodiments are only some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, or It can be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

[0022] like figure 1 As shown, the sewage purification system provided in this embodiment includes a first dosing device 100, a second dosing device 101, a third dosing device 102, a coagulation tank 103, a flocculation tank 104, a filter device 105 and a liquid storage tank 106. The first dosing device 100 and the second dosing device 101 are both communicated with the coagulation tank 103 through pipelines. The first dosing device 100 is used to hold polyaluminum chloride; the second dosing device 101 is used to hold the particle size The iron powder is 0.08mm-0.1mm; the third dosing device 102 is communicated with the flocculation tank 104 through a pipeline, and the third dosing device 102 is used for containing polyacrylamide. The bottom of the coagulation tank 103 communicates with the top of the flocculation tank 104 through an "S"-shaped pipe. The filtering device 105 includes a motor 107 , a rotating shaft, an adsorption disk 108 , a positioning disk, a scraper 109 , a sewage tank 110 , a sub sewage tank 110 and a clean water tank 111 sleeved outside the sewage tank 110 ; the rotating shaft is arranged in the sewage tank 110 connected to the output shaft of the motor 107 through the sprocket; several adsorption disks 108 are arranged on the rotating shaft side by side through the positioning disk; several scrapers 109 are arranged on the sludge tank along the direction in which the adsorption disks 108 are arranged, and each adsorption disk 108 are matched with a scraper 109, and the scraper 109 is used to remove the sludge on the adsorption disk 108; a number of sub-sump tanks 110 are fixedly arranged in the sewage tank 110 along the direction in which the adsorption disks 108 are arranged. Half of the tray 108 is placed in a sub-sewage tank 110; the lower part of each sub-sewage tank 110 is provided with a water inlet that communicates with the sewage tank 110, and the open end of each sub-sewage tank 110 is provided with an overflow groove, overflowing The launder is communicated with the clean water tank 111, and the clean water tank 111 is communicated with the liquid storage tank 106 through a pipeline. The flocculation tank 104 communicates with the sewage tank 110 through pipes. The above-mentioned adsorption disk 108 can be made of any material with strong adsorption capacity for iron powder. It should be noted that the various devices provided in this embodiment should meet explosion-proof standards, that is, explosion-proof devices. In addition, in this system, electromagnetic flowmeter 131, sampling valve 132, dosing meter 133 and other equipment can be installed on the pipelines of two adjacent communication devices, so that the flow of sewage and the amount of dosing can be effectively controlled. , the quality of sewage at different stages, and improve the efficiency of the entire purification process. Both the coagulation tank 103 and the flocculation tank 104 are provided with stirring paddles, so that the coagulation reaction and the flocculation reaction are more complete, and the purification efficiency is further improved. Those skilled in the art should understand that the adsorption disk 108 should be made of a material with strong adsorption force for iron powder, such as NdFeB permanent magnets. A strong magnetic field is generated between them, which are all applicable to this embodiment.

[0023]In the sewage purification system provided in this embodiment, while adding a coagulant (polyaluminum chloride) to the coagulation tank 103, iron powder medium with a particle size of 0.08mm-0.1mm is added to the coagulation tank 103. Under the action of sewage flocculant (polyacrylamide), iron powder is used as floc core medium, and the gravity sedimentation and adsorption of iron powder are used to accelerate the flocculation of pollutants in sewage into flocs with larger volume and weight. The flocs flow through the filtration device 105 and pass through the adsorption disk 108 of the filtration device 105 to adsorb the flocs containing iron powder in the sewage and separate from the sewage. The adsorption disk 108 is driven by the motor to rotate, the adsorption disk 108 placed outside the sub-sewage tank 110 is in contact with the scraper 109 , and the flocs adsorbed on the adsorption disk 108 are scraped off by the scraper 109 . The evolved sewage overflows from the sub-sewage tank 110 and flows into the clean water tank 111 to complete the purification process. The purified sewage can meet the national discharge standard. Moreover, the whole purification process does not require the settlement and floating of flocs, and the removal of flocs from sewage is through physical adsorption. It can maximize the purification, thereby reducing the time of sewage purification and improving the purification efficiency. Due to the whole sewage purification process, the adsorption turntable keeps rotating, continuously capturing the flocculent mud mass from the water, and through the mud scraper 109, the mud mass is continuously scraped out in time, so that the adsorption turntable is continuously cleaned. Therefore, the whole purification process does not have any form of blockage and retention. Furthermore, in the purification process, a large number of sedimentation devices are not required, which reduces the cost of the equipment. In addition, the sewage purification system provided in this embodiment has a wide range of applications, not only can be applied to the purification of water in rivers, rivers, lakes, and reservoirs, but also can be used in the treatment and reuse of domestic, industrial wastewater, sewage, and dirty water, For example, the recycling and purification treatment of washing water, steel rolling wastewater, and dust removal water in iron and steel plants; mine processing wastewater, oily wastewater from oil production, coal washing wastewater in coal mines, automobile washing wastewater, landscape water, swimming pool water, reclaimed water, etc. The reuse and purification treatment saves a lot of money water resources. Of course, it should be noted that when the sewage purification system provided in this embodiment purifies different sewage, a heating device can be added to the system, for example, a heating device is installed outside the flocculation tank 104 to heat the sewage in the flocculation tank 104. , in order to promote the flocculation reaction and improve the purification efficiency. The above examples are only for enumeration, of course, the specific installation of the heating device on which device should be installed according to the actual purification needs. In addition, through a large number of production tests, the use of polyaluminum chloride and polyacrylamide can play a better coagulation and flocculation effect on sewage purification, and these two agents have a wide range of applications and a wide range of raw material sources. Of course, the added coagulant or flocculant can also be adjusted according to the purification of different sewage to meet the actual purification needs.

[0024] like figure 1 As shown, the sewage purification system provided in this embodiment may further include a sludge storage tank 112 , a sludge pump 113 , a sludge thickener 114 and a belt filter press 115 . One end of the scraper 109 away from the adsorption disk 108 is communicated with the sludge storage tank 112, and the scraper 109 is used to guide the sludge on the adsorption disk 108 into the sludge storage tank 112; the sludge storage tank 112 is connected to the sludge storage tank 112 through a pipeline. The sludge inlet of the sludge thickener 114 is communicated, and a sludge pump 113 is arranged on the pipeline connecting the two; the sludge outlet of the sludge thickener 114 is communicated with the belt filter press 115 . The flocculent sludge scraped by the scraper 109 is diverted to the sludge storage tank 112 through the scraper 109, and the flocculation sludge in the sludge storage tank 112 is transported to the sludge thickener through the sludge pump 113 114. The sludge is concentrated by the sludge thickener 114, and the dried sludge is transported to the belt filter press 115 and discharged after treatment, so that the content of sewage in the discharged sludge is low, so the content of pollutants in the sludge is low. , will not pollute the surrounding discharge environment. Preferably, the sludge thickener 114 is provided with a return pipe 116 , and the coagulation tank 103 is communicated with the sludge thickener 114 through the return pipe 116 . Since the return pipe 116 is provided, the concentrated sewage in the flocculation sludge can be returned to the coagulation tank 103 through the return pipe 116 to be purified again to make it meet the discharge standard.

[0025] like figure 1 As shown, the sewage purification system provided in this embodiment may further include a primary purification device 117 . The primary purification device 117 includes a sewage lifting pump 118 , a sewage pipeline, a sewage pool 119 and a filter tank 120 disposed in the sewage pool 119 . The filter tank 120 is provided with a sewage water inlet, the bottom of which is a cone, and a number of water outlet holes are arranged on its side peripheral surface: the bottom of the filter tank 120 is provided with a first sewage outlet, and one end of the sewage pipe is communicated with the first sewage outlet. , and the other end passes through the sewage tank 119 to discharge the sewage; the sewage lifting pump 118 is arranged in the sewage tank 119 and communicates with the coagulation tank 103 through a pipeline. By setting the filter tank 120, the sewage containing relatively large solid impurities passes through the primary filtration of the filter tank 120, and the solid impurities are blocked by the water outlet holes of the filter tank 120 and settle in the conical bottom of the filter tank 120. The sewage lift pump 118 is transported to the coagulation tank 103 for reaction. The solid impurities in the filter tank 120 are discharged from the filter tank 120 through the sewage pipeline. By providing the primary purification device 117, the scope of application of the system can be increased, and the damage to subsequent equipment of solid impurities can be effectively reduced; and this filtering method has a short filtering period and does not increase the time of the overall purification process.

[0026] like figure 1 As shown, the purification system provided in this embodiment may further include a first packed tower 121, which is arranged between the filter device 105 and the liquid storage tank 106, and is stacked with a layer of magnet particles 122, and a clean water tank 111 The upper part of the first packed tower 121 is communicated with the upper part of the first packed tower 121 through a pipeline, and the lower part of the first packed tower 121 is communicated with the liquid storage tank 106 through a pipeline. Sewage is left from the clean water tank 111 and flows through the magnet particle layer 122 in the first packed tower 121 , which can effectively remove iron powder that does not participate in flocculation in the sewage, and further purifies the sewage. Further, it can also include a second packed tower 123, the second packed tower 123 is arranged between the first packed tower 121 and the liquid storage tank 106, the second packed tower 123 is provided with a first support plate 124, the first support The plate 124 is provided with a first through hole, and the iron-carbon micro-electrolysis packing layer 125 is stacked on the first support plate 124; the bottom of the second packing tower 123 is a cone, and the lower part of the first packing tower 121 is connected with the second packing through a pipeline. The upper part of the tower 123 is communicated, the side wall of the second packed tower 123 is provided with a drain port, the liquid drain port is placed between the first support plate 124 and the bottom of the second packed tower 123, and the liquid drain port is connected to the liquid storage via a pipeline The tank 106 is communicated; the bottom of the second packing tower 123 is provided with a second sewage outlet, and the second sewage outlet is communicated with the sludge inlet of the sludge thickener 114 through a pipeline. The sewage passing through the first packed tower 121 enters the second packed tower 123 and passes through the iron-carbon micro-electrolysis packing layer 125 to flocculate the sewage again, and the unremoved pollutants in the sewage enter the iron-carbon micro-electrolysis packing layer 125 , flocculated into flocs, the sewage and flocs flow through the first through holes of the first support plate 124, and are placed at the bottom of the second packed tower 123 for settling. The flocculated flocs are discharged through the second sewage outlet, and are guided to the sludge thickener 114 through the pipeline, and the flocculated sludge is purified by the sludge thickener 114 . By providing the second packed tower 123, the sewage can be further purified, so that the content of pollutants in the purified sewage is lower. In addition, the purification system provided in this embodiment may further include a third packed tower 126, the third packed tower 126 is provided with a second support plate 129, and the second support plate 129 is provided with a second through hole; the second support plate 129, in the direction away from the second support plate 129, the activated carbon layer 127 and the biological packing layer 128 are successively stacked; The bottom is communicated with the liquid storage tank 106 through a pipeline. The sewage purified by the second packed tower 123 flows into the third packed tower 126, and passes through the biological packing layers 128 respectively, which can further oxidize the aerobic organisms in the sewage; and then pass through the activated carbon layer 127. The impurities and biological flocs in the sewage are removed, and the water quality of the purified sewage is further improved. In this system, an air aerator can also be added to fill the biological packing layer 128 with air through pipes, so as to promote aerobic biological oxidation in the sewage and reduce the purification time. It should also be noted that the sewage purification system provided in this embodiment may further include a central control system 130 for controlling the sewage purification system. The central control system 130 is electrically connected with other devices in the system, and controls the entire purification process through the control of the hollow system. Those skilled in the art should understand that the central control system 130 can be any central control system 130 known in the art that can implement the above functions.

[0027] In addition, each device in the sewage purification system provided in this embodiment can be of a skid-mounted type, which not only saves space for use, but also facilitates transportation.

[0028] The sewage purification system provided in this embodiment can effectively purify the sewage, the purification period is short, the water quality of the purified sewage meets the discharge standard, and can be reused according to production needs, and has a wide range of applications. In addition, the device has simple manufacturing process, low manufacturing cost, convenient operation, does not occupy space, and is convenient for transportation, is suitable for domestic and industrial sewage purification, and is easy to popularize and use.