Membrane reactor equipment for treating tannery wastewater

Abstract

The utility model provides membrane reactor equipment for treating tannery wastewater, and belongs to the technical field of tannery wastewater treatment. The membrane reactor equipment for treating tannery wastewater comprises a microfilter, a first treatment structure and a second treatment structure. The first treatment structure comprises a first treatment tank, a medicament feeding part, a stirring part, an air flotation part and a separation part, the output end of the microfilter is communicated with the first treatment tank through a connecting pipeline, and one side of the sludge tank is communicated with a blow-off pipe; the second treatment structure comprises a second treatment tank, a secondary filter part and a transfer part, the transfer part is mounted between the hydrolytic acidification area and the filter area, and a discharge pipe is fixedly communicated with one side of the filter area. According to the utility model, the air floatation is added in the treatment process, so that a large amount of grease in sewage can be removed, the load is reduced for the subsequent biochemical treatment, and meanwhile, the MBR membrane component is used for secondary treatment to reduce secondary pollution caused by mud running, so that the sewage treatment quality is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of leather-making wastewater treatment, in particular to a membrane reactor device for treating leather-making wastewater. Background Art

[0002] Tanning wastewater refers to the wastewater generated during the preparation and tanning stages of leather production, that is, during the wet operation process. Tannery wastewater has a large discharge volume, high pH value, high chroma, a wide variety of pollutants, and complex components. The main pollutants include heavy metal chromium, soluble protein, dander, suspended matter, tannin, lignin, inorganic salts, oils, surfactants, dyes, and resins.

[0003] At present, the wastewater is mostly treated by traditional coagulation sedimentation and activated sludge method. The traditional treatment process is prone to insufficient treatment of grease in the sewage during the treatment process, which increases the load for subsequent sewage treatment and affects the quality of wastewater treatment. At the same time, the traditional secondary sedimentation tank causes sludge to run due to environmental fluctuations, causing secondary pollution. Therefore, it is necessary to propose a membrane reactor equipment for treating leather wastewater to solve the above problems. Utility Model Content

[0004] In order to make up for the above deficiencies, the utility model provides a membrane reactor equipment for treating leather wastewater, aiming to improve the current treatment of the wastewater, which mostly adopts the traditional coagulation sedimentation and activated sludge method to treat the wastewater. In the treatment process, the traditional treatment process is prone to insufficient treatment of oil and fat in the sewage, which increases the load for subsequent sewage treatment and affects the quality of wastewater treatment. At the same time, the traditional secondary sedimentation tank produces sludge due to environmental fluctuations, causing secondary pollution.

[0005] The utility model is achieved in this way:

[0006] The utility model provides a membrane reactor device for treating leather wastewater, comprising a microfilter and a first treatment structure connected with the microfilter, and a second treatment structure connected with the first treatment structure.

[0007] The first treatment structure includes a first treatment tank, a chemical dosing member, an agitator, an air flotation member and a separator. The output end of the microfilter is connected to the first treatment tank through a connecting pipeline. The interior of the first treatment tank is formed with a coagulation zone, an aeration zone and a separation zone through a first baffle and a second baffle. The coagulation zone is connected to the bottom of the aeration zone. The chemical dosing member and the agitator are installed in the coagulation zone, the air flotation member is installed in the aeration zone, and the separator is installed in the separation zone. A sludge tank is fixed inside the separation zone, and a sewage pipe is connected to one side of the sludge tank; the second treatment structure includes a second treatment tank, a buffer member, a secondary filter member and a transfer member. The interior of the second treatment tank is formed with a hydrolysis acidification zone and a filtration zone through a third baffle. The buffer member is installed between the second treatment tank and the first treatment tank, the secondary filter member is installed in the filtration zone, the transfer member is installed between the hydrolysis acidification zone and the filtration zone, and a discharge pipe is connected and fixed to one side of the filtration zone.

[0008] In one embodiment of the utility model, the drug delivery component includes a drug pump, a main drug pipe and a drug liquid tank, the drug pump and the drug liquid tank are installed on one side of the first treatment tank, the main drug pipe is connected and fixed at the upper end of the coagulation zone, the drug pump and the main drug pipe are connected through a drug inlet pipe, a nozzle is installed at the bottom of the main drug pipe, three drug liquid tanks are formed inside the drug liquid tank, the liquid inlet end of the drug pump is connected to a four-way pipe, the four-way pipe extends into the drug liquid tank, and control valves are installed on the three pipes of the four-way pipe.

[0009] In one embodiment of the utility model, the stirring member includes a first horizontal plate and two rotating rods, the first horizontal plate is fixed to the coagulation zone, the two rotating rods are rotatably connected to the first horizontal plate, a first servo motor is installed at the end of one of the rotating rods, stirring blades are fixed on the rotating rod, and the two rotating rods are connected through a transmission part.

[0010] In an embodiment of the utility model, the transmission part includes two transmission wheels, the two transmission wheels are respectively key-connected to the two rotating rods, and the transmission wheels are connected to each other through a transmission chain.

[0011] In one embodiment of the utility model, the flotation component includes a second horizontal plate and an aerator, the second horizontal plate is fixed to the aeration area, two hollow tubes are fixed through the second horizontal plate, one end of the hollow tube is connected to the main air pipe, and the other end of the hollow tube is installed with an aeration plate, the aerator is installed on the side of the first treatment tank, and the aerator is connected to the main air pipe through an air pipe.

[0012] In one embodiment of the utility model, the separation element includes a second servo motor and two shaft rollers, the two shaft rollers are rotatably connected to the separation area, the second servo motor is installed on one side of the first treatment tank and fixed to one of the shaft rollers, the two shaft rollers are sleeved with conveyor belts, and scrapers are evenly fixed on the conveyor belts.

[0013] In one embodiment of the utility model, the cache component includes a cache tank and a liquid outlet pipe, the cache tank is connected to the first treatment tank through a connecting block, the cache tank is connected to the separation zone through a connecting pipe, and the cache tank is connected to the hydrolysis acidification zone through the liquid outlet pipe.

[0014] In one embodiment of the present utility model, the secondary filter element comprises an aeration device and an MBR membrane assembly, the aeration device is installed in the filtration zone, and the MBR membrane assembly is installed above the aeration device.

[0015] In one embodiment of the utility model, the transfer member comprises a liquid pump, the liquid inlet end of the liquid pump is connected to the hydrolysis acidification zone through a liquid inlet pipe, and the liquid outlet end of the liquid pump is connected to the filtration zone through a liquid outlet pipe.

[0016] The beneficial effects of the utility model are as follows: the utility model is a membrane reactor device for treating leather wastewater obtained by the above design. When in use, the leather wastewater first enters the microfiltration machine to remove hair and fibrous substances, and then enters the first water treatment tank through the connecting pipeline. At this time, the agent is put into the sewage through the agent delivery member and the agent and the sewage are further mixed with the stirring of the stirring member, so that the spraying and mixing of the liquid medicine can be more uniform, so that the flocculation is more diverse and more complete. At this time, the sewage enters the aeration zone from the bottom of the first partition plate, and the air flotation member generates micro bubbles to float the flocculants to the wastewater. The surface of the liquid, and then enters the separation area through the second partition, and then the floating flocculants are scraped into the sludge tank by the separation element for solid-liquid separation. The treated wastewater is transferred to the hydrolysis acidification area again through the buffer element for acid-base adjustment. At this time, the sewage is transferred to the filtration area by the transfer element, and further filtered by the secondary filter element before being discharged through the discharge pipe. In this way, increasing flotation during the treatment process can remove a large amount of grease in the sewage, reduce the load for subsequent biochemical treatment, and use the MBR membrane assembly for secondary treatment to reduce the secondary pollution caused by sludge running, thereby improving the quality of sewage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic structural diagram of a membrane reactor device for treating tanning wastewater provided by an embodiment of the utility model from a first perspective;

[0019] Figure 2 A schematic structural diagram of a membrane reactor device for treating tanning wastewater from a second perspective provided by an embodiment of the utility model;

[0020] Figure 3 A schematic cross-sectional structure diagram of a first treatment tank of a membrane reactor device for treating tanning wastewater provided in an embodiment of the utility model;

[0021] Figure 4 A schematic diagram of a partial exploded structure of a membrane reactor device for treating tanning wastewater provided in an embodiment of the utility model;

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the second treatment tank of the membrane reactor equipment for treating tanning wastewater provided in an embodiment of the utility model.

[0023] In the figure: 100-microfiltration machine; 110-connecting pipeline; 200-first treatment structure; 210-first treatment tank; 211-coagulation zone; 212-aeration zone; 213-separation zone; 214-first partition; 215-second partition; 220-drug delivery member; 221-drug pump; 222-main drug pipe; 223-sprinkler; 224-drug tank; 225-four-way pipe; 230-stirring member; 231-first horizontal plate; 232-first servo motor; 233-rotating rod; 234-stirring blade; 235-transmission part; 2351-transmission wheel; 2352-transmission chain; 240-air flotation member; 241-second horizontal plate; 242-aerator; 243-main Air pipe; 244-hollow pipe; 245-aeration plate; 250-separation element; 251-second servo motor; 252-shaft roller; 253-conveyor belt; 254-scraper; 260-sludge tank; 261-drain pipe; 300-second treatment structure; 310-second treatment tank; 311-hydrolysis acidification zone; 312-filtration zone; 313-discharge pipe; 314-third partition; 320-buffer element; 321-buffer tank; 322-connecting block; 323-connecting pipe; 324-liquid outlet pipe; 330-secondary filter element; 331-aeration device; 332-MBR membrane assembly; 340-transfer element; 341-liquid pump; 342-liquid inlet pipe; 343-liquid outlet pipe. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example

[0026] See also Figure 1-Figure 5 The utility model provides a technical solution: a membrane reactor device for treating tanning wastewater, comprising a microfilter 100 and a first treatment structure 200 connected to the microfilter 100, and a second treatment structure 300 connected to the first treatment structure 200.

[0027] See also Figure 1-Figure 4The first treatment structure 200 includes a first treatment tank 210, a reagent dispensing member 220, an agitator 230, an air flotation member 240 and a separator 250. The output end of the microfiltration machine 100 is connected to the first treatment tank 210 through a connecting pipe 110. The interior of the first treatment tank 210 is formed with a coagulation zone 211, an aeration zone 212 and a separation zone 213 through a first baffle 214 and a second baffle 215. The coagulation zone 211 is connected to the bottom of the aeration zone 212. The reagent dispensing member 220 and the agitator 230 are installed in the coagulation zone 211, the air flotation member 240 is installed in the aeration zone 212, and the separator 250 is installed in the separation zone 213. A sludge tank 260 is fixed inside the separation zone 213, and a sewage pipe 261 is connected to one side of the sludge tank 260.

[0028] The drug delivery component 220 includes a drug pump 221, a main drug pipe 222 and a drug liquid tank 224. The drug pump 221 and the drug liquid tank 224 are installed on one side of the first treatment tank 210. The main drug pipe 222 is connected and fixed at the upper end of the coagulation zone 211. The drug pump 221 and the main drug pipe 222 are connected through a drug inlet pipe. A nozzle 223 is installed at the bottom of the main drug pipe 222. Three drug liquid tanks are formed inside the drug liquid tank 224. The liquid inlet end of the drug pump 221 is connected to a four-way pipe 225. The four-way pipe 225 extends into the drug liquid tank. Control valves are installed on the three pipes of the four-way pipe 225. Here, three drug liquid tanks can be used to mix multiple drugs at the same time and then spray them. This is conducive to improving the diversity and uniformity of the use of drugs, and can be more uniform and sufficient during flocculation.

[0029] The agitator 230 includes a first transverse plate 231 and two rotating rods 233. The first transverse plate 231 is fixed in the coagulation zone 211. The two rotating rods 233 are rotatably connected to the first transverse plate 231. A first servo motor 232 is installed at the end of one rotating rod 233. A stirring blade 234 is fixed on the rotating rod 233. The two rotating rods 233 are connected by a transmission part 235. The transmission part 235 includes two transmission wheels 2351. The two transmission wheels 2351 are respectively keyed to the two rotating rods 233. The transmission wheels 2351 are connected by a transmission chain 2352. The agitator 230 is used here to further improve the mixing uniformity and make the flocculation more complete.

[0030] The flotation member 240 includes a second transverse plate 241 and an aerator 242. The second transverse plate 241 is fixed to the aeration area 212. Two hollow tubes 244 are fixed through the second transverse plate 241. One end of the hollow tube 244 is connected to the main air pipe 243. The other end of the hollow tube 244 is installed with an aeration plate 245. The aerator 242 is installed on the side of the first treatment tank 210. The aerator 242 is connected to the main air pipe 243 through an air pipe. The microbubbles generated by the aeration plate 245 are used to wrap and float the flocculants. The separation element 250 includes a second servo motor 251 and two shaft rollers 252. The two shaft rollers 252 are rotatably connected to the separation zone 213. The second servo motor 251 is installed on one side of the first treatment tank 210 and fixed to a shaft roller 252. Conveyor belts 253 are sleeved on the two shaft rollers 252. Scrapers 254 are evenly fixed on the conveyor belts 253. Here, the second servo motor 251 drives the shaft rollers 252 and the conveyor belts 253 to rotate, and the scrapers 254 are used to scrape the impurities floating in the separation zone 213 into the sludge tank 260 for solid-liquid separation.

[0031] See also Figure 1 , Figure 2 and Figure 5 The second treatment structure 300 includes a second treatment tank 310, a buffer element 320, a secondary filter element 330 and a transfer element 340. The interior of the second treatment tank 310 is formed with a hydrolysis acidification zone 311 and a filtration zone 312 through a third partition plate 314. The buffer element 320 is installed between the second treatment tank 310 and the first treatment tank 210. The secondary filter element 330 is installed in the filtration zone 312. The transfer element 340 is installed between the hydrolysis acidification zone 311 and the filtration zone 312. One side of the filtration zone 312 is connected and fixed with a discharge pipe 313.

[0032] The cache element 320 includes a cache tank 321 and a liquid outlet pipe 324. The cache tank 321 is connected to the first treatment tank 210 through a connecting block 322. The cache tank 321 is connected to the separation zone 213 through a connecting pipe 323. The cache tank 321 is connected to the hydrolysis acidification zone 311 through the liquid outlet pipe 324. The cache tank 321 can store the sewage at the first level and then transfer it to the hydrolysis acidification zone 311.

[0033] The secondary filter element 330 includes an aeration device 331 and an MBR membrane assembly 332. The aeration device 331 is installed in the filtration zone 312, and the MBR membrane assembly 332 is installed above the aeration device 331. The transfer element 340 includes a liquid pump 341. The liquid inlet end of the liquid pump 341 is connected to the hydrolysis acidification zone 311 through a liquid inlet pipe 342, and the liquid outlet end of the liquid pump 341 is connected to the filtration zone 312 through a liquid outlet pipe 343. Here, the transfer element 340 is used to transfer the wastewater in the hydrolysis acidification zone 311 to the filtration zone 312 and further filter it through the aeration device 331 and the MBR membrane assembly 332, thereby improving the adequacy of the filtration.

[0034] Specifically, the working principle of the membrane reactor device for treating tanning wastewater is as follows: when in use, the tanning wastewater first enters the microfilter 100 to remove hair and fibrous substances, and then enters the first water treatment tank 210 through the connecting pipe 110. At this time, the drug pump 221 transports the various drugs in the drug tank 224 to the inside of the main drug pipe 222 through the four-way pipe 225, and sprays them out through the nozzle 223. While the drugs are being added, the agitator 230 works to further mix the drugs with the sewage, so that the spraying and mixing of the drug solution can be more uniform, making the flocculation more diverse and more complete. At this time, the sewage enters the aeration area 212 from the bottom of the first partition 214. At this time, the aerator 242 works to generate microbubbles through the aeration disk 245, floats the flocculants to the surface of the wastewater, and then passes through the second partition 215 enters the separation zone 213, at which time the second servo motor 251 drives the shaft roller 252 and the conveyor belt 253 to rotate, and the scraper 254 on the conveyor belt 253 is used to scrape the floating flocculants into the sludge tank 260 for solid-liquid separation, and the treated wastewater is transferred to the hydrolysis acidification zone 311 again through the buffer 320 for acid-base adjustment, and at this time the liquid pump 341 is used to transfer the sewage to the filtration zone 312, and the aeration device 331 and the MBR membrane assembly 332 are used to further filter and then discharged through the discharge pipe 313, so that the increase of flotation in the treatment process can remove a large amount of grease in the sewage, reduce the load for subsequent biochemical treatment, and use the MBR membrane assembly 332 for secondary treatment to reduce the secondary pollution caused by sludge running, thereby improving the quality of sewage treatment.

[0035] It should be noted that the specific models and specifications of the microfiltration machine 100, the medicine pump 221, the first servo motor 232, the aerator 242, the second servo motor 251, the aeration device 331 and the liquid pump 341 need to be selected and determined according to the actual specifications of the device, etc. The specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0036] The power supply and principles of the microfiltration machine 100, the drug pump 221, the first servo motor 232, the aerator 242, the second servo motor 251, the aeration device 331 and the liquid pump 341 are clear to those skilled in the art and will not be described in detail herein.

[0037] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A membrane reactor device for treating tannery wastewater, comprising a microfilter (100), a first treatment structure (200) connected to the microfilter (100), and a second treatment structure (300) connected to the first treatment structure (200), characterized in that: The first treatment structure (200) comprises a first treatment tank (210), a drug delivery member (220), an agitator (230), an air flotation member (240) and a separator (250); the output end of the microfilter (100) is connected to the first treatment tank (210) via a connecting pipe (110); the interior of the first treatment tank (210) is formed with a coagulation zone (211), an aeration zone (212) and a separation zone (250) via a first baffle (214) and a second baffle (215). 213), the coagulation zone (211) is connected to the bottom of the aeration zone (212), the agent delivery member (220) and the stirring member (230) are installed in the coagulation zone (211), the air flotation member (240) is installed in the aeration zone (212), the separation member (250) is installed in the separation zone (213), a sludge tank (260) is fixed inside the separation zone (213), and one side of the sludge tank (260) is connected to a sewage discharge pipe (261); The second treatment structure (300) comprises a second treatment tank (310), a buffer element (320), a secondary filter element (330) and a transfer element (340); the interior of the second treatment tank (310) is formed with a hydrolysis acidification zone (311) and a filtration zone (312) through a third partition plate (314); the buffer element (320) is installed between the second treatment tank (310) and the first treatment tank (210); the secondary filter element (330) is installed in the filtration zone (312); the transfer element (340) is installed between the hydrolysis acidification zone (311) and the filtration zone (312); and a discharge pipe (313) is connected and fixed to one side of the filtration zone (312).

2. A membrane reactor device for treating tanning wastewater according to claim 1, characterized in that: The drug delivery component (220) comprises a drug pump (221), a main drug pipe (222) and a drug liquid tank (224); the drug pump (221) and the drug liquid tank (224) are installed on one side of the first treatment tank (210); the main drug pipe (222) is connected and fixed to the upper end of the coagulation zone (211); the drug pump (221) and the main drug pipe (222) are connected via a drug inlet pipe; a nozzle (223) is installed at the bottom of the main drug pipe (222); three drug liquid tanks are formed inside the drug liquid tank (224); the liquid inlet end of the drug pump (221) is connected to a four-way pipe (225); the four-way pipe (225) extends into the drug liquid tank; control valves are installed on the three pipes of the four-way pipe (225).

3. The membrane reactor device for treating tanning wastewater according to claim 1, characterized in that: The stirring member (230) comprises a first transverse plate (231) and two rotating rods (233), wherein the first transverse plate (231) is fixed to the coagulation zone (211), and the two rotating rods (233) are rotatably connected to the first transverse plate (231), a first servo motor (232) is installed at the end of one of the rotating rods (233), and a stirring blade (234) is fixed on the rotating rod (233), and the two rotating rods (233) are connected in transmission via a transmission part (235).

4. A membrane reactor device for treating tanning wastewater according to claim 3, characterized in that: The transmission part (235) comprises two transmission wheels (2351), the two transmission wheels (2351) are respectively key-connected to the two rotating rods (233), and the transmission wheels (2351) are transmission-connected via a transmission chain (2352).

5. The membrane reactor device for treating tanning wastewater according to claim 1, characterized in that: The air flotation member (240) comprises a second transverse plate (241) and an aerator (242); the second transverse plate (241) is fixed to the aeration area (212); two hollow tubes (244) are fixedly passed through the second transverse plate (241); one end of the hollow tube (244) is connected to a main air pipe (243); the other end of the hollow tube (244) is installed with an aeration plate (245); the aerator (242) is installed on the side of the first treatment tank (210); the aerator (242) is connected to the main air pipe (243) through an air pipe.

6. The membrane reactor device for treating tannery wastewater according to claim 1, characterized in that: The separation element (250) includes a second servo motor (251) and two shaft rollers (252), the two shaft rollers (252) are rotatably connected to the separation area (213), the second servo motor (251) is installed on one side of the first treatment tank (210) and fixed to one of the shaft rollers (252), a conveyor belt (253) is sleeved on the two shaft rollers (252), and a scraper (254) is evenly fixed on the conveyor belt (253).

7. The membrane reactor device for treating tanning wastewater according to claim 1, characterized in that: The cache element (320) includes a cache tank (321) and a liquid outlet pipe (324); the cache tank (321) is connected to the first treatment tank (210) via a connecting block (322); the cache tank (321) is connected to the separation zone (213) via a connecting pipe (323); and the cache tank (321) is connected to the hydrolysis acidification zone (311) via the liquid outlet pipe (324).

8. The membrane reactor device for treating tannery wastewater according to claim 1, characterized in that: The secondary filter element (330) comprises an aeration device (331) and an MBR membrane assembly (332); the aeration device (331) is installed in the filtration area (312); and the MBR membrane assembly (332) is installed above the aeration device (331).

9. The membrane reactor device for treating tannery wastewater according to claim 1, characterized in that: The transfer member (340) comprises a liquid pump (341), the liquid inlet end of the liquid pump (341) is connected to the hydrolysis acidification zone (311) via a liquid inlet pipe (342), and the liquid outlet end of the liquid pump (341) is connected to the filtration zone (312) via a liquid outlet pipe (343).

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