Circular treatment device for NMP-containing wastewater

Abstract

The utility model discloses a circular treatment device for NMP-containing wastewater, and relates to the technical field of NMP-containing wastewater treatment devices, the circular treatment device comprises a treatment box main body, the treatment box main body is provided with a circular treatment device, the circular treatment device comprises a treatment unit and a sludge wastewater separation treatment unit, the treatment unit comprises a nitrification mixing rod, a rotating motor is arranged at the top of the nitrification mixing rod, the nitrification mixing rod is connected with a stirring rod, a driving gear is arranged on the nitrification mixing rod, driven gears are symmetrically distributed at the left end and the right end of the driving gear, and positioning screw rods are arranged on the driven gears. The nitrification mixing rod in the treatment unit is arranged to complete stirring treatment on NMP-containing wastewater and sludge, and the driving gear is in transmission engagement with the driven gears at the two ends, so that the inner wall of the treatment box main body is scraped by the wall scraping frame finally, wastewater is ensured to be attached to the inner wall in the treatment process, and the subsequent wastewater treatment effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of NMP-containing wastewater recycling treatment devices, and particularly relates to a recycling treatment device for NMP-containing wastewater. Background Art

[0002] NMP wastewater mainly comes from process wastewater such as NMP purification in the production process, residual liquid in solvent recycling treatment, wastewater from vacuum pumps, wastewater for floor and equipment cleaning, etc.

[0003] The COD of NMP wastewater is relatively high. The COD concentrations of wastewater generated in different industries vary, and the salt content is also relatively high, even up to more than 10%. The high salt content in the wastewater will limit the biochemical degradation of organic matter in the wastewater. Therefore, wastewater with a high salt content needs to be desalted, and then the biochemical treatment of high-concentration organic wastewater is further considered. This type of wastewater belongs to high-concentration organic wastewater, may contain a high salt content, and the concentrations of sS and total nitrogen are also relatively high. The water quality and quantity fluctuate greatly, with a strong smell and high chromaticity.

[0004] The treatment of NMP sewage is mainly that the high-concentration sewage of NMP sewage enters the regulating tank alone. After homogenization, it is pumped to the UBF. After anaerobic treatment in the UBF, it enters the regulating tank together with other low-concentration sewage. The high-concentration sewage after anaerobic treatment and the low-concentration sewage adjust the water quality and quantity in the regulating tank, and are pumped to the anoxic reactor through a pump. The anoxic reactor receives the effluent from the regulating tank, the return sludge from the secondary sedimentation tank, and the nitrified liquid returned from the first aerobic reactor, and conducts a denitrification reaction to finally remove the nitrate nitrogen in the sewage in the form of nitrogen gas. The effluent from the anoxic reactor enters the first aerobic reactor, where most of the pollutants are removed, and ammonia nitrogen is oxidized into nitrate nitrogen and nitrite nitrogen. The effluent from the first aerobic reactor enters the second aerobic reactor. Under the aerobic aeration state of the sewage, the ammonia nitrogen that has not been completely oxidized continues to conduct nitrification and denitrification reactions. The microorganisms in the reactor decompose and digest the pollutants in the water through aerobic action, degrade the organic matter into water and carbon dioxide, and purify the water quality. The effluent from the second aerobic reactor enters the secondary sedimentation tank for mud-water separation, and the supernatant is discharged up to standard. The excess sludge generated in the anaerobic UBF reactor and the secondary sedimentation tank enters the sludge thickening tank. The supernatant of the sludge thickening tank flows back to the regulating tank, and the sludge in the sludge tank is dewatered by a filter press and transported out for disposal, and the filtrate returns to the regulating tank. However, the remaining sludge in the sedimentation tank enters the sludge thickening tank, and the NMP-containing sludge attached to its inner wall is very difficult to clean, resulting in poor treatment results. Content of the Utility Model

[0005] The utility model provides a recycling treatment device for NMP-containing wastewater to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the technical solution adopted by the utility model is:

[0007] A circulating treatment device for NMP-containing wastewater, comprising a main treatment tank body, a circulating treatment device is installed on the main treatment tank body, the circulating treatment device includes a treatment unit and a sludge wastewater separation and treatment unit, the treatment unit is installed in the upper part of the treatment chamber in the main treatment tank body, and the sludge wastewater separation and treatment unit is installed in the lower part of the treatment chamber;

[0008] The treatment unit includes a nitrification mixing rod, the nitrification mixing rod is located at the center of the top of the main treatment tank body, a rotating motor is arranged at the top of the nitrification mixing rod, and a stirring rod is connected to the nitrification mixing rod at the axis of the treatment chamber. A driving gear is arranged on the nitrification mixing rod, driven gears are symmetrically distributed at the left and right ends of the driving gear, a positioning screw rod is arranged on the driven gear, lifting connecting rods are arranged at the left and right ends of the threaded sleeve arranged on the threaded part of the positioning screw rod, and a wall scraping frame is arranged at the bottom of the lifting connecting rod.

[0009] Among them, when the nitrification mixing rod in the treatment unit drives the stirring rod to complete the stirring treatment of the NMP-containing wastewater and sludge in the present invention, due to the transmission and meshing of the driving gear and the driven gears at both ends, the positioning screw rod rotates to cause the threaded sleeve to lift on the threaded part, and finally the wall scraping frame scrapes the inner wall of the main treatment tank body, ensuring that the inner wall adheres to the wastewater during the treatment process and improving the subsequent wastewater treatment effect.

[0010] A further improvement of the technical solution of the present invention is that: the nitrification mixing rod is vertically and rotatably installed on the main treatment tank body, the nitrification mixing rod is connected to the rotating motor through a coupling, the stirring rod is fixedly connected to the nitrification mixing rod, and the stirring rod is key-connected to the driving gear, and the driving gear is key-connected to the driven gears arranged at both ends.

[0011] A further improvement of the technical solution of the present invention is that: the positioning screw rod is vertically installed on the top of the main treatment tank body, and the positioning screw rod is rotatably connected to the main treatment tank body. The positioning screw rod is threadedly connected to the threaded sleeve through an external thread. The lifting connecting rod is fixedly connected to the threaded sleeve, and the bottom of the lifting connecting rod is connected to the wall scraping frame through a fastener, and the lifting connecting rod is slidably connected to the main treatment tank body.

[0012] A further improvement of the technical solution of the present invention is that: the sludge wastewater separation and treatment unit includes an inclined sieve plate, the inclined sieve plate is located in the middle of the treatment chamber, a through port is arranged on one side of the inclined sieve plate, a pull-out sealing plate is arranged at the through port, and a blanking baffle is arranged at the bottom of the inclined sieve plate. There are two groups of the blanking baffles, and a feeding channel is formed between the two groups of blanking baffles. A driving shaft is arranged on the feeding channel, and filter pressing blades are arranged on the driving shaft.

[0013] Among them, in the present utility model, through the inclined placement of the inclined sieve plate in the sludge and wastewater separation and treatment unit, larger impurities or impurity clusters in the NMP-containing wastewater and sludge cannot pass through the inclined sieve plate, and due to the inclination of the sieve plate and gravity, they slide to one side of the pull-out sealing plate. After the treatment is completed, they are uniformly and centrally removed by pulling out the pull-out sealing plate. Moreover, the wastewater passing through the inclined sieve plate enters the feeding channel and is crushed again by the filter pressing blades on the driving shaft, improving the treatment effect and facilitating subsequent cyclic treatment.

[0014] A further improvement of the technical solution of the present utility model lies in that: the inclined sieve plate is fixedly installed in the treatment chamber, the pull-out sealing plate is movably connected to the main body of the treatment tank through a through port, the blanking baffle is welded inside the treatment chamber, and the driving shaft is rotatably connected to the main body of the treatment tank, and the filter pressing blades are fixedly connected to the driving shaft.

[0015] A further improvement of the technical solution of the present utility model lies in that: a groove seat is arranged at the bottom of the blanking baffle, a sealing partition is arranged in the groove seat, an arc-shaped connecting block is arranged at the bottom of the sealing partition, an electric push rod is arranged on the arc-shaped connecting block, the other end of the electric push rod is located on the treatment chamber, the groove seat is slidably connected to the sealing partition, and the electric push rod is connected to the sealing partition through the arc-shaped connecting block.

[0016] Due to the adoption of the above technical solution, the technical progress achieved by the present utility model compared with the prior art is:

[0017] 1. The present utility model provides a cyclic treatment device for NMP-containing wastewater. When the nitrification mixing rod in the treatment unit drives the stirring rod to complete the stirring treatment of the NMP-containing wastewater and sludge, due to the transmission and meshing of the driving gear and the driven gears at both ends, the positioning screw rotates to cause the threaded sleeve to move up and down in the threaded part, and finally the scraping frame completes the scraping of the inner wall of the main body of the treatment tank, ensuring that the inner wall is attached with wastewater during the treatment process and improving the treatment effect of the subsequent wastewater.

[0018] 2. The present utility model provides a cyclic treatment device for NMP-containing wastewater. Through the inclined placement of the inclined sieve plate in the sludge and wastewater separation and treatment unit, larger impurities or impurity clusters in the NMP-containing wastewater and sludge cannot pass through the inclined sieve plate, and due to the inclination of the sieve plate and gravity, they slide to one side of the pull-out sealing plate. After the treatment is completed, they are uniformly and centrally removed by pulling out the pull-out sealing plate. Moreover, the wastewater passing through the inclined sieve plate enters the feeding channel and is crushed again by the filter pressing blades on the driving shaft, improving the treatment effect and facilitating subsequent cyclic treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of the whole of the present utility model;

[0020] Figure 2 This is a schematic structural diagram of the circulation treatment device of the present utility model;

[0021] Figure 3 This is a schematic structural diagram of the treatment unit of the present utility model;

[0022] Figure 4 This is a schematic structural diagram of the sludge and wastewater separation treatment unit of the present utility model.

[0023] In the figure: 1. Main body of the treatment tank; 201. Nitrification mixing rod; 202. Rotating motor; 203. Stirring rod; 204. Driving gear; 205. Driven gear; 206. Positioning screw; 207. Threaded sleeve; 208. Lifting connecting rod; 209. Scraping wall frame; 301. Inclined sieve plate; 302. Drawable sealing plate; 303. Feeding baffle; 304. Driving shaft; 305. Filter pressing blade; 306. Groove seat; 307. Sealing partition; 308. Arc-shaped connecting block; 309. Electric push rod. Specific implementation manners

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Please refer to Figures 1-4 , the present utility model provides a technical solution:

[0026] Embodiment 1:

[0027] A circulating treatment device for NMP-containing wastewater includes a main body 1 of a treatment tank. A circulating treatment device is installed on the main body 1 of the treatment tank. The circulating treatment device includes a treatment unit and a sludge and wastewater separation treatment unit. The treatment unit is installed in the upper part of the treatment chamber in the main body 1 of the treatment tank, and the sludge and wastewater separation treatment unit is installed in the lower part of the treatment chamber;

[0028] The treatment unit includes a nitrification mixing rod 201. The nitrification mixing rod 201 is located at the center of the top end of the main body 1 of the treatment tank. A rotating motor 202 is arranged at the top of the nitrification mixing rod 201. And a stirring rod 203 is connected to the nitrification mixing rod 201 at the axis of the treatment chamber. A driving gear 204 is arranged on the nitrification mixing rod 201. Driven gears 205 are symmetrically distributed at the left and right ends of the driving gear 204. A positioning screw 206 is arranged on the driven gear 205. Threaded sleeves 207 arranged on the threaded parts of the positioning screw 206 are provided with lifting connecting rods 208 at the left and right ends. A scraping wall frame 209 is arranged at the bottom of the lifting connecting rod 208.

[0029] When the nitrification mixing rod 201 in the processing unit drives the stirring rod 203 to complete the stirring treatment of the NMP-containing wastewater and sludge in the present utility model, due to the transmission meshing of the driving gear 204 and the driven gears 205 at both ends, the positioning screw rod 206 rotates to cause the threaded sleeve 207 to lift and lower at the threaded part, and finally the scraping wall frame 209 scrapes the inner wall of the processing tank body 1, ensuring that wastewater adheres to the inner wall during the processing and improving the subsequent wastewater treatment effect.

[0030] The nitrification mixing rod 201 is vertically and rotatably installed on the processing tank body 1. The nitrification mixing rod 201 is connected to the rotating motor 202 through a coupling. The stirring rod 203 is fixedly connected to the nitrification mixing rod 201, and the stirring rod 203 is key-connected to the driving gear 204. The driving gear 204 is key-connected to the driven gears 205 arranged at both ends.

[0031] The positioning screw rod 206 is vertically installed on the top of the processing tank body 1 and is rotatably connected to the processing tank body 1. The positioning screw rod 206 is threadedly connected to the threaded sleeve 207 through an external thread. The lifting connecting rod 208 is fixedly connected to the threaded sleeve 207. The bottom of the lifting connecting rod 208 is connected to the scraping wall frame 209 through a fastener, and the lifting connecting rod 208 is slidably connected to the processing tank body 1.

[0032] Embodiment 2:

[0033] On the basis of Embodiment 1: The sludge wastewater separation and treatment unit includes an inclined sieve plate 301. The inclined sieve plate 301 is located in the middle of the processing chamber. There is a through port on one side of the inclined sieve plate 301. A pull-out sealing plate 302 is arranged at the through port. And a blanking baffle 303 is arranged at the bottom of the inclined sieve plate 301. There are two groups of blanking baffles 303. An inlet channel is formed between the two groups of blanking baffles 303. A driving shaft 304 is arranged on the inlet channel. A filter pressing blade 305 is arranged on the driving shaft 304.

[0034] In the present utility model, through the inclined placement of the inclined sieve plate 301 in the sludge wastewater separation and treatment unit, larger impurities or impurity clusters in the NMP-containing wastewater and sludge cannot pass through the inclined sieve plate 301, and due to the inclination of the sieve plate and gravity, they slide to one side of the pull-out sealing plate 302. After the treatment is completed, they are uniformly and centrally removed by pulling out the pull-out sealing plate 302. And the wastewater passing through the inclined sieve plate 301 enters the inlet channel and is crushed again by the filter pressing blade 305 on the driving shaft 304, improving the treatment effect and facilitating subsequent cyclic treatment.

[0035] The inclined sieve plate 301 is fixedly installed in the treatment chamber. The pull-out sealing plate 302 is movably connected to the main body 1 of the treatment tank through the through port. The blanking baffle 303 is welded inside the treatment chamber, and the drive shaft 304 is rotatably connected to the main body 1 of the treatment tank. The filter pressing leaf 305 is fixedly connected to the drive shaft 304.

[0036] A groove seat 306 is provided at the bottom of the blanking baffle 303. A sealing partition 307 is arranged in the groove seat 306. An arc connecting block 308 is arranged at the bottom of the sealing partition 307. An electric push rod 309 is arranged on the arc connecting block 308. The other end of the electric push rod 309 is located on the treatment chamber. The groove seat 306 is slidably connected to the sealing partition 307. The electric push rod 309 is connected to the sealing partition 307 through the arc connecting block 308.

[0037] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the said element.

Claims

1. A circulating treatment device for NMP-containing wastewater, comprising a treatment tank body (1), characterized in that: A circulation treatment device is installed on the treatment box body (1), and the circulation treatment device includes a treatment unit and a sludge and wastewater separation treatment unit. The treatment unit is installed at the upper part of the treatment chamber in the treatment box body (1), and the sludge and wastewater separation treatment unit is installed at the lower part of the treatment chamber. The processing unit comprises a nitration mixing rod (201), the nitration mixing rod (201) is located at the top center of the processing box body (1), a rotating motor (202) is arranged on the top of the nitration mixing rod (201), and the nitration mixing rod (201) is connected to a stirring rod (203) at the axis of the processing chamber, a driving gear (204) is arranged on the nitration mixing rod (201), and driven gears (205) are symmetrically distributed on the left and right ends of the driving gear (204), and a positioning screw (206) is arranged on the driven gear (205), and a threaded sleeve (207) arranged on the threaded part of the positioning screw (206) is arranged on the left and right ends. A lifting connecting rod (208) is arranged, and a wall scraping frame (209) is arranged at the bottom of the lifting connecting rod (208).

2. A circulating treatment device for NMP-containing wastewater according to claim 1, characterized in that: The nitration mixing rod (201) is vertically rotatably mounted on the treatment box body (1); the nitration mixing rod (201) is connected to the rotating motor (202) via a coupling; the stirring rod (203) is fixedly connected to the nitration mixing rod (201); the stirring rod (203) is key-connected to a driving gear (204); and the driving gear (204) is key-connected to driven gears (205) arranged at both ends.

3. A circulating treatment device for NMP-containing wastewater according to claim 2, characterized in that: The positioning screw (206) is vertically installed on the top of the processing box body (1), and the positioning screw (206) is rotatably connected to the processing box body (1), the positioning screw (206) is threadedly connected to the threaded sleeve (207) via an external thread, the lifting connecting rod (208) is fixedly connected to the threaded sleeve (207), the bottom of the lifting connecting rod (208) is connected to the scraper frame (209) via a fastener, and the lifting connecting rod (208) is slidably connected to the processing box body (1).

4. A circulating treatment device for NMP-containing wastewater according to claim 1, characterized in that: The sludge wastewater separation treatment unit comprises an inclined screen plate (301), wherein the inclined screen plate (301) is located in the middle of the treatment chamber, a through opening is provided on one side of the inclined screen plate (301), a pull-out sealing plate (302) is provided at the through opening, and a material discharge baffle (303) is provided at the bottom of the inclined screen plate (301), two groups of the material discharge baffles (303) are provided, and a feed channel is formed in the middle of the two groups of the material discharge baffles (303), and a drive shaft (304) is provided on the feed channel, and a filter press leaf (305) is provided on the drive shaft (304).

5. A circulating treatment device for NMP-containing wastewater according to claim 4, characterized in that: The inclined screen plate (301) is fixedly installed in the processing chamber, the pull-out sealing plate (302) is movably connected to the processing box body (1) through a through opening, the unloading baffle plate (303) is welded inside the processing chamber, and the driving shaft (304) is rotatably connected to the processing box body (1), and the filter press leaf (305) is fixedly connected to the driving shaft (304).

6. A circulating treatment device for NMP-containing wastewater according to claim 4, characterized in that: A groove seat (306) is provided at the bottom of the unloading baffle (303), a sealing baffle (307) is provided in the groove seat (306), an arc-shaped connecting block (308) is provided at the bottom of the sealing baffle (307), an electric push rod (309) is provided on the arc-shaped connecting block (308), and the other end of the electric push rod (309) is located on the processing chamber, the groove seat (306) is slidably connected to the sealing baffle (307), and the electric push rod (309) is connected to the sealing baffle (307) through the arc-shaped connecting block (308).

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