Sewage treatment system

Abstract

The utility model discloses a sewage treatment system. The sewage treatment system comprises a sewage pool; the dosing device comprises a PAC dosing tank, a PAM dosing tank, an alkali dosing tank and a heavy metal removal dosing tank which are sequentially connected, the PAC is connected with the sewage tank, and the PAC dosing tank, the PAM dosing tank, the alkali dosing tank and the heavy metal removal dosing tank are respectively provided with a first exhaust pipe, a second exhaust pipe, a third exhaust pipe and a fourth exhaust pipe; the filter pressing device is connected with the heavy metal removal dosing tank; the RO device is connected with the filter pressing device; the purified water tank is connected with the RO device; and the spray tower is respectively connected with the first exhaust pipe, the second exhaust pipe, the third exhaust pipe and the fourth exhaust pipe. According to the sewage treatment system disclosed by the embodiment of the invention, the sewage can be treated to obtain pure water for secondary production, so that water recycling is realized, resources are saved, the production cost is reduced, meanwhile, waste gas purification can also be realized, and air pollution is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of sewage treatment, in particular to a sewage treatment system. BACKGROUND

[0002] The wastewater in ceramic production mainly comes from raw material preparation, glaze preparation process, equipment and ground washing water, kiln cooling water. In the production of wall and floor tiles, it also includes spray drying tower flushing and wall and floor tile polishing cooling water. The pressure filtration water in the raw material refining process mainly contains suspended solids, usually with fine suspended particles; the waste water from trimming has a small amount but a large amount of suspended solids, reaching 5000mg / L; the polishing wastewater is mainly produced in the processes of grinding, polishing, edge grinding and chamfering, and mainly contains tile powder, polishing agent and grinding agent; the equipment and workshop ground flushing water includes the flushing of ball mills, slurry tanks, silos, spray drying towers, the flushing of glazing, printing machinery and iron removers, etc. Due to the differences of various workshops and processes and different ceramic products, the pollutants in this type of wastewater are relatively complex, mainly including siliceous suspended particles, mineral suspended particles, chemical raw material suspended particles, grease, lead, cadmium, zinc, iron and other toxic pollutants; the indirect cooling water of the equipment has no pollution and is mainly temperature rise. Although most ceramic enterprises have carried out wastewater treatment, some enterprises still have not thoroughly treated wastewater and still discharge a large amount of wastewater. The discharge of a large amount of wastewater will pollute the surrounding ecological environment and also cause waste of water resources and increase production cost. CONTENT OF THE UTILITY MODEL

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a sewage treatment system which can treat sewage to obtain pure water for production again, thereby realizing the recycling use of water, saving resources, reducing production cost, and also realizing the purification of waste gas, avoiding air pollution and protecting the environment.

[0004] The sewage treatment system according to the embodiment of the present application comprises a sewage pool, a dosing device comprising a PAC dosing pool, a PAM dosing pool, an alkali dosing pool and a heavy metal removal dosing pool connected in sequence, the PAC being connected with the sewage pool, the PAC dosing pool, the PAM dosing pool, the alkali dosing pool and the heavy metal removal dosing pool being respectively provided with a first exhaust pipe, a second exhaust pipe, a third exhaust pipe and a fourth exhaust pipe, a pressure filtration device connected with the heavy metal removal dosing pool, an RO device connected with the pressure filtration device, a purified water tank connected with the RO device, and a spray tower connected with the first exhaust pipe, the second exhaust pipe, the third exhaust pipe and the fourth exhaust pipe respectively.

[0005] The sewage treatment system has at least the following beneficial effects: sewage in the sewage tank is subjected to coagulation in the PAC dosing tank, so that suspended solids, colloidal particles and the like in the sewage are gathered to form larger flocs; then the sewage is subjected to flocculation treatment in the PAM dosing tank, so that the structure and stability of the flocs are further enhanced; then the sewage is subjected to reaction in the alkali dosing tank, so that the acid in the sewage is neutralized to meet the pH value standard, and the heavy metal ions in the sewage are also converted into precipitates; then the sewage is subjected to heavy metal removal in the heavy metal removal dosing tank; then the sewage is subjected to pressure filtration in the pressure filtration device, so that the solids in the sewage are removed; then the water filtered out by the pressure filtration is subjected to purification and pressure filtration by the RO device, so that pure water is obtained; the pure water flows into the purified water tank, and is used for production again; and the waste gas generated in the reaction process of the PAC dosing tank, the PAM dosing tank, the alkali dosing tank and the heavy metal removal dosing tank is treated by the spray tower before being discharged. The sewage treatment system can obtain pure water by treating sewage, so that the water is recycled, resources are saved, production costs are reduced, waste gas is purified, air pollution is avoided, and the environment is protected.

[0006] The PAC dosing tank is provided with a first dosing pipe, and the first dosing pipe is provided with a first dosing pump.

[0007] The PAM dosing tank is provided with a second dosing pipe, and the second dosing pipe is provided with a second dosing pump.

[0008] The alkali dosing tank is provided with a third dosing pipe, and the third dosing pipe is provided with a third dosing pump.

[0009] The heavy metal removal dosing tank is provided with a fourth dosing pipe, and the fourth dosing pipe is provided with a fourth dosing pump.

[0010] The pressure filtration device comprises a rack, a pressure filtration plate and a slag collecting disc. Two girders are arranged on the rack. The pressure filtration plate is slidably arranged on the two girders. The pressure filtration plate is provided with a liquid inlet. The liquid inlet is connected with the heavy metal removal dosing tank. The pressure filtration plate is provided with a water outlet pipe. The water outlet pipe is connected with the RO device. The slag collecting disc is arranged below the pressure filtration plate.

[0011] The lower part of the slag collecting disc is provided with a water collecting tank. The water outlet pipe is connected with the water collecting tank. The water collecting tank is connected with the RO device.

[0012] The sewage treatment system according to the embodiment of the present application is provided with a slag collecting disc, and the slag collecting disc is provided with a discharging guide plate, the discharging guide plate comprises a first guide plate and a plurality of second guide plates, the width of the first guide plate gradually decreases towards the discharging direction, the second guide plates are connected to one end of the first guide plate away from the slag collecting disc, and the two sides of the first guide plate and the second guide plates are provided with baffles.

[0013] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0014] The present application will be further described below in conjunction with the drawings and embodiments, wherein:

[0015] Figure 1 Fig. 1 is a structural schematic diagram of the sewage treatment system according to the embodiment of the present application;

[0016] Figure 2 Fig. 2 is a structural schematic diagram of the pressure filtration device in the sewage treatment system according to the embodiment of the present application;

[0017] Figure 3 Fig. 3 is a structural schematic diagram of the discharging guide plate in the sewage treatment system according to the embodiment of the present application.

[0018] Reference Signs:

[0019] Sewage tank 100; PAC dosing tank 210; first exhaust pipe 211; first dosing pipe 212; first dosing pump 213; PAM dosing tank 220; second exhaust pipe 221; second dosing pipe 222; second dosing pump 223; alkali dosing tank 230; third exhaust pipe 231; third dosing pipe 232; third dosing pump 233; heavy metal removal dosing tank 240; fourth exhaust pipe 241; fourth dosing pipe 242; fourth dosing pump 243; pressure filtration device 300; rack 310; pressure filtration plate 320; slag collecting disc 330; girder 340; liquid inlet 350; water outlet pipe 360; water collecting tank 370; discharging guide plate 380; first guide plate 381; second guide plate 382; RO device 400; purified water tank 500; spray tower 600. DETAILED DESCRIPTION

[0020] The embodiments of the present application are described in detail below, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0021] In the description of the application, it needs to be understood that the orientation description, such as the orientation or position relationship indicated by the upper, lower, front, rear, left, right and the like, is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the application.

[0022] In the description of the application, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than and the like are understood as not including the number, above, below, within and the like are understood as including the number. If the first, second is described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0023] In the description of the application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the application in combination with the specific content of the technical scheme. In the description of the application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the application. In the description of the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner. In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in at least one embodiment or example of the application. In the description of the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0024] Reference Figures 1 to 3The sewage treatment system provided by the application comprises a sewage pool 100, a dosing device comprising a PAC dosing pool 210, a PAM dosing pool 220, an alkali dosing pool 230 and a heavy metal removal dosing pool 240 connected in sequence, wherein the PAC is connected with the sewage pool 100, and the PAC dosing pool 210, the PAM dosing pool 220, the alkali dosing pool 230 and the heavy metal removal dosing pool 240 are respectively provided with a first exhaust pipe 211, a second exhaust pipe 221, a third exhaust pipe 231 and a fourth exhaust pipe 241; a filter press device 300 connected with the heavy metal removal dosing pool 240; an RO device 400 connected with the filter press device 300; a purified water tank 500 connected with the RO device 400; and a spray tower 600 connected with the first exhaust pipe 211, the second exhaust pipe 221, the third exhaust pipe 231 and the fourth exhaust pipe 241 respectively.

[0025] The sewage in the sewage pool 100 is subjected to coagulation in the PAC dosing pool 210 to gather suspended solids, colloidal particles and the like in the sewage to form larger flocs, then subjected to flocculation in the PAM dosing pool 220 to further strengthen the structure and stability of the flocs, then subjected to reaction in the alkali dosing pool 230 to neutralize the acid in the sewage and make the pH value reach the standard, and also convert the heavy metal ions in the sewage into precipitates, then subjected to heavy metal removal in the heavy metal removal dosing pool 240, then subjected to pressure filtration in the filter press device 300 to remove the solids in the water, and then subjected to purification and pressure filtration in the RO device 400 to obtain pure water, which flows into the purified water tank 500 for reuse. The exhaust gas generated in the reaction process of the PAC dosing pool 210, the PAM dosing pool 220, the alkali dosing pool 230 and the heavy metal removal dosing pool 240 is treated in the spray tower 600 before being discharged. The sewage treatment system of the application can treat the sewage to obtain pure water for reuse, thereby realizing the recycling use of water, saving resources, reducing production cost, purifying the exhaust gas, avoiding air pollution and protecting the environment.

[0026] With reference to Figure 1 The PAC dosing pool 210 is provided with a first dosing pipe 212, and the first dosing pipe 212 is provided with a first dosing pump 213. The PAM dosing pool 220 is provided with a second dosing pipe 222, and the second dosing pipe 222 is provided with a second dosing pump 223. The alkali dosing pool 230 is provided with a third dosing pipe 232, and the third dosing pipe 232 is provided with a third dosing pump 233. The heavy metal removal dosing pool 240 is provided with a fourth dosing pipe 242, and the fourth dosing pipe 242 is provided with a fourth dosing pump 243. By adopting the above structure, automatic dosing of various drugs can be realized without manual dosing, intelligent operation is realized, and work efficiency is improved.

[0027] With reference to Figure 2In some embodiments of the present application, the filter press device 300 comprises a rack 310, a filter press plate 320 and a slag collecting tray 330, two girders 340 are arranged on the rack 310, the filter press plate 320 is slidingly arranged on the two girders 340, the filter press plate 320 is provided with a liquid inlet 350, the liquid inlet 350 is connected with the heavy metal removal dosing tank 240, the filter press plate 320 is provided with a water outlet pipe 360, the water outlet pipe 360 is connected with the RO device 400, and the slag collecting tray 330 is arranged below the filter press plate 320. After the sewage treated by the dosing device, it enters the filter press device 300 through the liquid inlet 350, and is subjected to pressure filtration under the action of the sliding filter press plate 320, so that the solid in the sewage is pressed into a cake-shaped filter residue and collected through the slag collecting tray 330, and the water obtained after pressure filtration enters the RO device 400 for purification and filtration.

[0028] It is conceivable that the lower part of the slag collecting tray 330 is provided with a water collecting tank 370, the water outlet pipe 360 is connected with the water collecting tank 370, and the water collecting tank 370 is connected with the RO device 400. The water collecting tank 370 is used to support and fix the slag collecting tray 330, which is simple in structure and easy to operate. Of course, the slag collecting tray 330 can be arranged on the rack, and the present application does not limit this.

[0029] Referring to Figure 2 and Figure 3 , it is easy to understand that the slag collecting tray 330 is provided with a discharge guide plate 380, the discharge guide plate 380 comprises a first guide plate 381 and a plurality of second guide plates 382, the width of the first guide plate 381 gradually decreases towards the discharge direction, the second guide plates 382 are connected with one end of the first guide plate 381 away from the slag collecting tray 330, and the two sides of the first guide plate 381 and the second guide plates 382 are provided with baffle plates. The cake-shaped filter residue is concentrated through the first guide plate 381 and then output through the second guide plates 382. The first guide plate 381 and the second guide plates 382 are both provided with a U-shaped bottom plate, the bottom plate is a metal plate, and the inner side of the bottom plate is provided with a plastic plate. By using a metal plate as the bottom plate, the supporting strength can be improved; by arranging a plastic plate on the inner side, the metal plate can be effectively prevented from rusting due to contact with the mud cake, thereby prolonging the service life.

[0030] The embodiments of the present application are described in detail above in combination with the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge range of ordinary skilled persons in the art without departing from the purpose of the present application.

Claims

1. A sewage treatment system characterised in that, The sewage tank is connected with a PAC dosing tank, a PAM dosing tank, an alkali dosing tank and a heavy metal removal dosing tank. The sewage tank is connected with a PAC dosing tank, a PAM dosing tank, an alkali dosing tank and a heavy metal removal dosing tank. The sewage tank is connected with a PAC dosing tank, a PAM dosing tank, an alkali dosing tank and a heavy metal removal dosing tank. The sewage tank is connected with a PAC dosing tank, a PAM dosing tank, an alkali dosing tank and a heavy metal removal dosing tank. The sewage tank is connected with a PAC dosing tank, a PAM dosing tank, an alkali dosing tank and a heavy metal removal dosing tank. The PAC dosing tank is provided with a first medicine inlet pipe, and the first medicine inlet pipe is provided with a first medicine pump. The PAM dosing tank is provided with a second medicine inlet pipe, and the second medicine inlet pipe is provided with a second medicine pump.

2. The sewage treatment system of claim 1, wherein, The alkali dosing tank is provided with a third medicine inlet pipe, and the third medicine inlet pipe is provided with a third medicine pump.

3. The sewage treatment system of claim 1, wherein, The heavy metal removal dosing tank is provided with a fourth medicine inlet pipe, and the fourth medicine inlet pipe is provided with a fourth medicine pump.

4. The sewage treatment system of claim 1, wherein, The filter press device comprises a rack, a filter plate and a slag collecting disc.

5. The sewage treatment system of claim 1, wherein, The lower part of the slag collecting disc is provided with a water collecting tank, the water outlet pipe is connected with the water collecting tank, and the water collecting tank is connected with the RO device.

6. The sewage treatment system of claim 1, wherein, The slag collecting disc is provided with a discharging guide plate, the discharging guide plate comprises a first guide plate and a plurality of second guide plates, the width of the first guide plate gradually decreases towards the discharging direction, the second guide plates are connected with one end of the first guide plate away from the slag collecting disc, and the two sides of the first guide plate and the second guide plates are provided with baffles.

7. The sewage treatment system of claim 6, wherein, ​ 8. The sewage treatment system of claim 6, wherein, ​

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