Treatment device for organic silicon resin wastewater

Abstract

The utility model provides a treatment device for organic silicon resin wastewater, which relates to the technical field of wastewater treatment, and comprises a regulating tank, a coagulation and flocculation tank and a sedimentation tank which are sequentially arranged from front to back, a neutralization reaction tank is arranged at the upstream position in the regulating tank, and the neutralization reaction tank is provided with a water inlet and a first dosing port; the coagulation and flocculation basin internally comprises a coagulation zone and a flocculation zone which are sequentially arranged from front to back, a baffle plate and at least two second dosing ports are arranged in the coagulation and flocculation basin, and the two second dosing ports are respectively communicated with the coagulation zone and the flocculation zone; the organic silicon resin wastewater treatment device is small in occupied area, low in energy consumption and stable in treatment effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater treatment, and more specifically relates to a treatment device for organic silicon resin wastewater. Background Art

[0002] Silicone resin wastewater mainly comes from the washing process in the production of silicone resin, the high-concentration organic wastewater generated by the separator when separating silicone resin, and the daily cleaning of workshops and equipment. Specifically, the washing process in the production of silicone resin will produce a large amount of acidic wastewater; the separation of silicone resin by the separator will produce high-concentration organic wastewater; and the daily cleaning of workshops and equipment will also produce wastewater.

[0003] There are many types of organic matter in organosilicon wastewater, and the chemical composition is complex. Most of them are difficult to biodegrade. Therefore, the CODcr concentration of the wastewater is high and the biodegradability is extremely poor. The wastewater is also very acidic. Except for a small amount of alkaline water discharged by the hydrolysis device, other production units are strongly acidic (mainly HCl) wastewater. At the same time, the inorganic matter in the wastewater is mainly hydrochloric acid and sodium salt, so the pH value is low, and Cl - The content is high, and the wastewater still contains a certain amount of floating oil and scum visible to the naked eye.

[0004] In the treatment of silicone resin wastewater, for low-concentration wastewater after pretreatment, that is, most of the light components in the wastewater have been removed from the pollutants, the organic matter in this wastewater is mostly heavy components, salts (NaCl), acids and a small amount of organic matter. At present, the main processes of neutralization, flocculation precipitation, sand filtration and activated carbon filtration are used to treat the wastewater. In the treatment process, the following problems mainly exist:

[0005] 1. The amount and quality of incoming water fluctuate greatly, the pH value is low, the neutralization reaction takes a long time, and the pH value of the effluent is unstable;

[0006] 2. The coagulation and flocculation reaction time is short, it is difficult to form large particles, the solid-liquid separation is difficult, and the effluent turbidity is large;

[0007] 3. To ensure that the effluent meets the standards, sand filtration and activated carbon filtration processes need to be added after the sedimentation tank, which requires a long process and occupies a large area;

[0008] 4. The sand outlet of the sand-water separator is easily blocked, which affects the separation function of the separator, causes wear of the lining and the conduit, and reduces the service life of the equipment. Utility Model Content

[0009] The purpose of the utility model is to provide a treatment device for organic silicone resin wastewater in view of the deficiencies in the prior art, so as to solve at least one of the problems existing in the treatment of organic silicone resin wastewater.

[0010] In order to achieve the above object, the utility model provides a treatment device for silicone resin wastewater, comprising:

[0011] An regulating tank, a coagulation and flocculation tank and a sedimentation tank are arranged in sequence from front to back, a neutralization reaction tank is arranged at the upstream position of the regulating tank, the neutralization reaction tank is provided with a water inlet and a first dosing port, the coagulation and flocculation tank includes a coagulation zone and a flocculation zone arranged in sequence from front to back, a baffle and at least two second dosing ports are arranged in the coagulation and flocculation tank, and the two second dosing ports are connected to the coagulation zone and the flocculation zone respectively.

[0012] Optionally, a stirrer is provided in the neutralization reaction tank.

[0013] Optionally, an aeration structure is provided in the regulating tank.

[0014] Optionally, the coagulation and flocculation tank is provided with a micro-sand return port, and the micro-sand return port is arranged in the flocculation zone.

[0015] Optionally, a sand-water separator is further included, which is connected to the mud discharge port of the sedimentation tank through a first return pipe, and a sand outlet is provided at the lower end of the sand-water separator, which is connected to the micro-sand return port through a second return pipe.

[0016] Optionally, the sand-water separator comprises a straight cylindrical portion and a conical portion arranged in sequence from top to bottom, an upper end of the conical portion is provided with an annular flushing pipe along its inner circumference, and the flushing pipe is provided with a plurality of flushing holes inclined downward.

[0017] Optionally, the flushing pipe is connected to a production water pipe, and the production water pipe passes through the outer wall of the sand-water separator.

[0018] Optionally, a water collecting tank, an inclined tube clarifier and a mud scraper are arranged in sequence from top to bottom in the sedimentation tank.

[0019] Optionally, a water outlet channel is provided on one side of the sedimentation tank, and the water outlet channel is connected to the water collecting tank.

[0020] Optionally, a lift pump is provided on the first return pipeline.

[0021] The utility model provides a treatment device for organic silicon resin wastewater, and its beneficial effects are as follows: the treatment device for organic silicon resin wastewater is provided with a neutralization reaction tank at an upstream position in a regulating tank, sewage transported by a sewage inlet pipe first enters the neutralization reaction tank through a water inlet, and medicine can be added into the neutralization reaction tank through a first medicine adding port, the neutralization agent and sewage are mixed in the neutralization reaction tank, and then enter the regulating tank after mixing, so that the neutralization agent is better mixed in the regulating tank while ensuring the reaction time, and the reaction time is increased, so that the pH value of the effluent meets the requirements; then the sewage enters a coagulation and flocculation tank, a coagulation zone and a flocculation zone of the coagulation and flocculation tank are respectively provided with a second medicine adding port, PAC and PAM agents can be added into the coagulation zone and the flocculation zone respectively, and a baffle is provided in the coagulation and flocculation tank, so that the sewage and the agent are fully mixed in the baffle process, and the coagulation and flocculation effect is improved; then the sewage enters a sedimentation tank for sedimentation, so as to realize solid-liquid separation; the treatment device for organic silicon resin wastewater has a small footprint, low energy consumption, and a stable treatment effect.

[0022] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0024] Figure 1 A schematic diagram of the main structure of a device for treating silicone resin wastewater according to an embodiment of the utility model is shown.

[0025] Figure 2 A schematic top view of the structure of a device for treating organic silicone resin wastewater according to an embodiment of the utility model is shown.

[0026] Figure 3 A schematic diagram of the main structure of a sand-water separator of a device for treating silicone resin wastewater according to an embodiment of the utility model is shown.

[0027] Figure 4 A schematic top view of the structure of a sand-water separator of a device for treating silicone resin wastewater according to an embodiment of the utility model is shown.

[0028] Description of reference numerals:

[0029] 1. Equalization tank; 2. Coagulation and flocculation tank; 3. Sedimentation tank; 4. Neutralization reaction tank; 5. Water inlet; 6. First dosing port; 7. Coagulation zone; 8. Flocculation zone; 9. Baffle; 10. Second dosing port; 11. PH sensor; 12. Mixer; 13. Aeration structure; 14. Sand and water separator; 15. First return pipe; 16. Second return pipe; 17. Straight tube; 18. Conical part; 19. Flushing pipe; 20. Production water pipe; 21. Water collecting tank; 22. Inclined tube clarifier; 23. Sludge scraper; 24. Mud discharge port; 25. Outlet channel; 26. Lifting pump; 27. External sludge pipe; 28. Sewage outlet pipe. DETAILED DESCRIPTION

[0030] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0031] like Figure 1 and Figure 2 As shown, the utility model provides a treatment device for organic silicone resin wastewater, comprising:

[0032] A regulating tank 1, a coagulation and flocculation tank 2 and a sedimentation tank 3 are arranged in sequence from front to back. A neutralization reaction tank 4 is arranged at the upstream position of the regulating tank 1. The neutralization reaction tank 4 is provided with a water inlet 5 and a first dosing port 6. The coagulation and flocculation tank 2 includes a coagulation zone 7 and a flocculation zone 8 which are arranged in sequence from front to back. A baffle 9 and at least two second dosing ports 10 are arranged in the coagulation and flocculation tank 2. The two second dosing ports 10 are connected to the coagulation zone 7 and the flocculation zone 8 respectively.

[0033] Specifically, the treatment device for silicone resin wastewater is provided with a neutralization reaction tank 4 at an upstream position in a regulating tank 1, and the sewage transported by the sewage inlet pipe first enters the neutralization reaction tank 4 through the water inlet 5, and the drug can be added into the neutralization reaction tank 4 through the first drug adding port 6, and the neutralization agent and the sewage are mixed in the neutralization reaction tank 4, and then enter the regulating tank 1 after mixing, so that the neutralization agent is better mixed in the regulating tank 1 while ensuring the reaction time, and the reaction time is increased, so that the pH value of the effluent meets the requirements; then the sewage enters the coagulation and flocculation tank 2, and the coagulation zone 7 and the flocculation zone 8 of the coagulation and flocculation tank 2 are respectively provided with a second drug adding port 10, and PAC and PAM agents can be added into the coagulation zone 7 and the flocculation zone 8 respectively, and the coagulation and flocculation tank 2 is provided with a baffle 9, which promotes the sewage and the agent to be fully mixed during the baffle process, and improves the coagulation and flocculation effect; then the sewage enters the sedimentation tank 3 for sedimentation to achieve solid-liquid separation; the treatment device for silicone resin wastewater has a small footprint, low energy consumption, and stable treatment effect.

[0034] Furthermore, baffles are arranged in the coagulation zone and the flocculation zone for mixing the reagent and the sewage, replacing the function of the mixer, thereby saving the mixer and reducing the cost and energy consumption.

[0035] In this embodiment, a pH sensor 11 is provided at the outlet of the regulating tank 1 for detecting the pH value at the outlet of the regulating tank 1 , and the dosage of the neutralizing agent can be adjusted according to the pH value.

[0036] Optionally, a stirrer 12 is provided in the neutralization reaction tank 4 .

[0037] Specifically, the provision of the mixer 12 can improve the mixing effect of the neutralizing agent and the sewage.

[0038] Optionally, an aeration structure 13 is provided in the regulating tank 1 .

[0039] Specifically, the aeration structure 13 includes an aeration pipe with holes, which is arranged at the bottom of the regulating tank 1, and can further promote the mixing of the neutralization agent and the sewage, thereby improving the effect of the neutralization reaction.

[0040] Optionally, the coagulation and flocculation tank 2 is provided with a micro-sand return port, and the micro-sand return port is arranged in the flocculation zone 8 .

[0041] Specifically, the micro-sand return port is used to return the micro-sand into the flocculation area 8 , and the pollutants are aggregated with the micro-sand under the action of the polymer flocculant to form large-particle flocs that are easy to settle, thereby accelerating the sedimentation rate of the pollutants in the sedimentation tank 3 .

[0042] Optionally, a sand-water separator 14 is further included, which is connected to the mud discharge port 24 of the sedimentation tank 3 through a first return pipe 15. A sand outlet is provided at the lower end of the sand-water separator 14, and the sand outlet is connected to the micro-sand return port through a second return pipe 16.

[0043] Specifically, the mud outlet 24 of the sedimentation tank 3 is set at the bottom of the sedimentation tank 3, and the precipitated sludge enters the sand-water separator 14 through the first return pipe 15. Due to the difference in specific gravity between the micro-sand and the sludge, under the action of the centrifugal force in the sand-water separator 14, the sludge is separated from the micro-sand, and the micro-sand sinks and is discharged through the sand outlet, and is discharged into the micro-sand return port through the second return pipe 16, and then enters the flocculation area 8.

[0044] Optionally, the sand-water separator 14 includes a straight cylinder portion 17 and a tapered portion 18 arranged in sequence from top to bottom, and an annular flushing pipe 19 is arranged at the upper end of the tapered portion 18 along its inner circumference, and a plurality of flushing holes inclined downward are opened on the flushing pipe 19.

[0045] Specifically, Figure 3 and Figure 4 As shown, the flushing pipe 19 flushes the inner wall of the conical portion 18 through the flushing hole. When the sand is discharged, the flushing pipe 19 is opened to flush the fine sand so that it can be discharged smoothly, and the wear of the sand-water separator 14 is reduced, thereby increasing its service life.

[0046] Optionally, the flushing pipe 19 is connected to a production water pipe 20 , and the production water pipe 20 passes through the outer wall of the sand-water separator 14 .

[0047] Specifically, production water can be used as flushing water and sprayed through the flushing holes on the flushing pipe 19 to achieve flushing.

[0048] Optionally, a water collecting tank 21, an inclined tube clarifier 22 and a mud scraper 23 are sequentially arranged in the sedimentation tank 3 from top to bottom.

[0049] Specifically, the sewage passes through the coagulation and flocculation tank 2 and enters the sedimentation tank 3. The sand-containing flocs are precipitated at a high speed under the action of the inclined tube clarifier 22. The clarified sewage is collected by the sump 21. The sludge containing micro-sand is precipitated at the bottom of the tank and collected by the scraper 23 to the sludge outlet 24 at the bottom center of the sedimentation tank 3.

[0050] Optionally, a water outlet channel 25 is provided on one side of the sedimentation tank 3 , and the water outlet channel 25 is connected to the water collecting tank 21 .

[0051] Specifically, the outlet channel 25 is connected to the water collecting tank 21 , and the sewage collected by the water collecting tank 21 is discharged through the outlet channel 25 and can be discharged through the sewage outlet pipe 28 .

[0052] Optionally, a lift pump 26 is provided on the first return line 15 .

[0053] Specifically, the lifting pump 26 can lift part of the sludge discharged from the sludge outlet 24 of the sedimentation tank 3 to the sand-water separator 14, and the other part of the sludge can be discharged to the next treatment process.

[0054] In summary, when the treatment device for silicone resin wastewater provided by the utility model is used, the pre-treated silicone resin wastewater enters the treatment device for silicone resin wastewater in the form of a pressure flow, and first enters the neutralization reaction tank 4. In the neutralization reaction tank 4, the sewage and the neutralization agent are fully mixed by the action of the agitator 12, and the pH value of the sewage is adjusted. The effluent enters the regulating tank 1. Under the action of the aeration structure 13 at the bottom of the regulating tank 1, the sewage is fully mixed in the regulating tank 1 to be homogenized and evenly distributed. At the same time, the neutralization reaction continues, so that the pH value of the effluent reaches 6 to 9, meeting the requirements of the subsequent treatment process. The sewage after the neutralization reaction enters the coagulation and flocculation tank 2 at the bottom of the regulating tank 1. The coagulation and flocculation tank 2 is provided with a baffle 9. In the coagulation zone 7, a coagulant can be added through a second dosing port 10. The agent flows with the sewage between the baffles and is mixed at the same time; the sewage then enters the flocculation zone 8, which is also provided with a baffle 9, and a flocculant is added through another second dosing port 10; at the same time, the micro-sand enters the flocculation zone 8 through the micro-sand reflux port, and the pollutants are polymerized with the micro-sand under the action of the high molecular flocculant into large-particle flocs that are easy to settle, and then enter the sedimentation tank 3. The sand-containing flocs are precipitated at a high speed under the action of the inclined tube clarifier 22. The clarified sewage is collected by the sump 21 and discharged through the outlet channel 25. The sludge containing micro-sand is precipitated at the bottom of the pool and collected by the scraper 23 to the sludge outlet 24 at the bottom center of the sedimentation tank 3. It is pumped out by the sludge lifting pump 26 in a certain proportion and discharged to the sand-water separator 14 through the first reflux pipeline 15. Due to the difference in specific gravity between the micro-sand and the sludge, the sludge is separated from the micro-sand under the action of the centrifugal force in the sand-water separator 14. Since the sand-water separator 14 is arranged at the top of the flocculation zone 8, the overflowing micro-sand can be directly reused in the flocculation zone 8, while the light sludge moves upward together with most of the water and is discharged from the sand-water separator 14 in the form of overflow, and is discharged into the sludge collection pool through the external sludge discharge pipe 27.

[0055] The various embodiments of the utility model have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A treatment device for silicone resin wastewater, characterized in that: include: An regulating tank, a coagulation and flocculation tank and a sedimentation tank are arranged in sequence from front to back, a neutralization reaction tank is arranged at the upstream position of the regulating tank, the neutralization reaction tank is provided with a water inlet and a first dosing port, the coagulation and flocculation tank includes a coagulation zone and a flocculation zone arranged in sequence from front to back, a baffle and at least two second dosing ports are arranged in the coagulation and flocculation tank, and the two second dosing ports are connected to the coagulation zone and the flocculation zone respectively.

2. The treatment device for silicone resin wastewater according to claim 1, characterized in that: A stirrer is arranged in the neutralization reaction tank.

3. The treatment device for silicone resin wastewater according to claim 1, characterized in that: An aeration structure is arranged in the regulating tank.

4. The treatment device for silicone resin wastewater according to claim 1, characterized in that: The coagulation and flocculation tank is provided with a micro-sand return port, and the micro-sand return port is arranged in the flocculation area.

5. The treatment device for silicone resin wastewater according to claim 4, characterized in that: It also includes a sand-water separator, which is connected to the mud discharge port of the sedimentation tank through a first return pipeline. A sand outlet is provided at the lower end of the sand-water separator, and the sand outlet is connected to the micro-sand return port through a second return pipeline.

6. The treatment device for silicone resin wastewater according to claim 5, characterized in that: The sand-water separator comprises a straight cylinder portion and a tapered portion which are arranged in sequence from top to bottom. An annular flushing pipe is arranged along the inner circumference of the upper end of the tapered portion, and a plurality of flushing holes inclined downward are opened on the flushing pipe.

7. The treatment device for silicone resin wastewater according to claim 6, characterized in that: The flushing pipe is connected to a production water pipe, and the production water pipe passes through the outer wall of the sand-water separator.

8. The treatment device for silicone resin wastewater according to claim 1, characterized in that: The sedimentation tank is provided with a water collecting tank, an inclined tube clarifier and a mud scraper in sequence from top to bottom.

9. The treatment device for organic silicone resin wastewater according to claim 8, characterized in that: A water outlet channel is arranged on one side of the sedimentation tank, and the water outlet channel is communicated with the water collecting tank.

10. The treatment device for organic silicone resin wastewater according to claim 5, characterized in that: A lift pump is arranged on the first return pipeline.

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