CN117550769A

CN117550769A - Wastewater treatment device and process for producing crude phenol and sodium sulfate by using sodium phenolate

Info

Publication number: CN117550769A
Application number: CN202410047144.6A
Authority: CN
Inventors: 窦争艳; 蒋云涛; 李彬
Original assignee: Inner Mongolia Xinjia New Energy Chemical Technology Co ltd
Current assignee: Inner Mongolia Xinjia New Energy Chemical Technology Co ltd
Priority date: 2024-01-12
Filing date: 2024-01-12
Publication date: 2024-02-13
Anticipated expiration: 2044-01-12
Also published as: CN117550769B

Abstract

The invention relates to the technical field of wastewater treatment, and discloses a device and a process for treating wastewater from crude phenol and sodium sulfate production by sodium phenolate, wherein the device comprises a tank body, and a top cover is arranged at an opening of the top surface of the tank body; the top cover is provided with a gas discharge pipe; an oil layer discharge pipe is arranged on the upper side wall of the tank body; the lower side wall of the tank body is provided with a water layer discharge pipe; the center of the top cover is rotationally connected with a hollow shaft, and the side wall of the hollow shaft is provided with a supporting rod; the free end of the supporting rod is provided with a rotating pipe; the side wall of the rotating shaft is rotationally matched with the inner hole of the hollow shaft; the lower end of the rotating shaft is provided with a stirring blade; the side wall of the tank body is provided with a feed pipe; the side wall of the feed pipe is provided with a feed bin which is used for containing materials to be separated, and the stirring blade penetrates into the feed bin to stir the materials; the material can be positively stirred through setting up the stirring leaf to this application, and the coarse phenol on separation upper strata and the sodium sulfate waste water of lower floor are accelerated, through setting up the commentaries on classics pipe, can reverse stirring material, reduce the rotational speed of material, the coarse phenol on upper strata and the sodium sulfate waste water formation layering of lower floor of being convenient for.

Description

Wastewater treatment device and process for producing crude phenol and sodium sulfate by using sodium phenolate

Technical Field

The invention belongs to the technical field of separation and relates to the technical field of wastewater treatment, in particular to a wastewater treatment device and a wastewater treatment process for producing crude phenol and sodium sulfate by sodium phenolate.

Background

At present, the method for preparing crude phenol by using sodium phenolate mainly comprises a sulfuric acid decomposition method and a carbon dioxide decomposition method, wherein the sulfuric acid decomposition flow is the traditional crude phenol decomposition flow, namely 98 percent sulfuric acid is dripped into the sodium phenolate, crude phenol and sodium sulfate wastewater are generated by using the sodium phenolate, the crude phenol is obtained from the upper layer through standing separation, and the sodium sulfate wastewater is obtained from the lower layer, so that the reaction is not violent, the decomposition is complete, the smoke escape is less, the operation environment is better, but the equipment and the pipeline are corroded seriously; the carbon dioxide decomposition method has no waste liquid discharge, the alkali liquor can be recycled, and simultaneously, the flue gas, the gas combustion waste gas and the like are fully utilized, but the process route is longer, and the quality of the decomposed crude phenol is poor (alkaline is obvious). In view of the above analysis, in order to ensure the quality of the product, sulfuric acid decomposition method was employed.

The Chinese patent with the patent number of CN202010394034.9 discloses a stirring device for preparing crude phenol by a phenol sodium salt sulfuric acid acidification method and a using method thereof; the device comprises a decomposer body, a supporting mechanism, a top cover mechanism, a circulating mechanism, a filtering mechanism, an acid adding mechanism and a sampling mechanism, wherein when the device is used, the circulating mechanism is arranged at the bottom end and inside the decomposer body, and the material stirring is realized by communicating the bottom end and the top end of the decomposer body and utilizing internal circulation; the filtering mechanism is arranged at one end of the circulating mechanism; the acid mechanism is arranged in the decomposer body and at one side; the sampling mechanism is arranged on the top cover mechanism.

The patent number CN20201315856. X's chinese patent discloses a sodium sulfate-containing wastewater treatment device and method of use thereof, the on-line screen storage device comprises a base, one side fixedly connected with support frame at base top, the top of support frame is provided with the processing box, the opposite side at base top is provided with the absorption box, one side at absorption box top is provided with the guard box, the inside of guard box is provided with the air exhauster, the exhaust opening intercommunication of air exhauster has the exhaust column, the one end of exhaust column runs through guard box and processing box in proper order and extends to the inside of processing box, the air outlet intercommunication of air exhauster has the tuber pipe, the bottom of tuber pipe runs through guard box and absorption box in proper order and extends to the inside of absorption box.

However, according to the technical scheme of the patent number CN202010394034.9, materials are continuously pumped through a circulating pump to be stirred, crude phenol obtained from the upper layer is continuously impacted, a stable crude phenol oil layer is difficult to form, and the separation effect is poor; in the technical scheme of the patent number CN20201315856. X, though stirring is carried out by stirring blades, the coarse phenol at the upper layer and the sodium sulfate wastewater at the lower layer are continuously rotated to hardly form layering, so that the separation effect is affected.

Disclosure of Invention

The invention aims to provide a device and a process for treating wastewater generated in the production of crude phenol and sodium sulfate by sodium phenolate, which solve the problem that layering is difficult to form due to continuous stirring in the background art and continuous rotation of the wastewater generated in the production of crude phenol and sodium sulfate in the upper layer.

The technical scheme adopted by the invention is as follows: a waste water treatment device for producing crude phenol and sodium sulfate by sodium phenolate comprises a tank body, wherein the tank body is barrel-shaped, and a top cover is connected with an opening on the top surface of the tank body through a flange; the top cover is provided with a gas discharge pipe; an oil layer discharge pipe is arranged on the upper side wall of the tank body and is used for discharging part of crude phenol; a water layer discharge pipe is arranged on the lower side wall of the tank body and used for discharging sodium sulfate wastewater; the center of the top cover is rotationally connected with a hollow shaft, the hollow shaft is vertically downwards arranged, the side wall of the hollow shaft below the top cover is provided with support rods, the number of the support rods is at least 4, and the interval angles of each support rod are the same; the free end of the supporting rod is provided with a rotating pipe which is used for reversely stirring materials; a first bevel gear is arranged on the side wall of the hollow shaft above the top cover; the side wall of the hollow shaft is provided with a shaft seat which is U-shaped, and the hollow shaft is rotationally connected with the lower horizontal section of the shaft seat; the vertical section of the shaft seat is rotationally connected with a second bevel gear which is meshed with the first bevel gear; the upper horizontal section of the shaft seat is rotationally connected with a rotating shaft; the upper end of the rotating shaft is provided with a first motor, the first motor is connected with a motor seat, the motor seat is fixed with the top cover, and the shaft seat is also fixed on the motor seat; a third bevel gear is arranged on the side wall of the rotating shaft and meshed with the second bevel gear; the rotating shaft is vertically downwards arranged, and the side wall of the rotating shaft is rotationally matched with the inner hole of the hollow shaft; the lower end of the rotating shaft is lower than the lower end of the hollow shaft; the lower end of the rotating shaft is provided with a stirring blade, the stirring She Yongyu positively stirs the materials, and the crude phenol on the upper layer and the sodium sulfate wastewater on the lower layer are separated in an accelerating way; a feeding pipe is arranged on the side wall of the tank body; the feed pipe lateral wall that is located the jar internal installs the feed bin, and the shape of feed bin is staving, and the feed bin is concentric with the pivot, and the diameter of feed bin is less than the diameter of commentaries on classics pipe, and the feed bin is used for holding the material of waiting to separate, and the stirring leaf is in going deep into the feed bin to stir the material.

Further, a process for using a wastewater treatment device for producing crude phenol and sodium sulfate from sodium phenolate is provided, which comprises the following steps: sodium sulfate wastewater enters a wastewater cooler to be cooled to below 35 ℃; the cooled sodium sulfate wastewater enters a tank body of an oil-water separator, the generated tail gas enters a tail gas system through a gas discharge pipe, the separated upper layer crude phenol enters a crude phenol tank, the separated sodium sulfate enters a sodium sulfate middle tank, the crude phenol secondarily separated by the sodium sulfate middle tank enters the crude phenol tank, the sodium sulfate secondarily separated by the sodium sulfate middle tank enters a sodium sulfate collecting tank, and the COD value of the wastewater after dephenolization is about 30000mg/L and contains 7000mg/L phenol; pumping sodium sulfate into a 4-level resin adsorption column through a resin adsorption feeding pump, removing organic impurity phenol through resin adsorption, reducing the phenol content to 100mg/L, reducing the COD value to 400-500mg/L, and then entering a sodium sulfate tank after adsorption; then sodium sulfate enters a neutralization tank, and alkali liquor in an alkali high-level tank enters the neutralization tank, and the alkali liquor and sodium sulfate undergo neutralization reaction, and the pH value is adjusted to 6-7; filtering by a filter press to obtain mechanical impurities, filtering by an active carbon filter, and then feeding the mechanical impurities into a sodium sulfate clear liquid tank; alkali liquor in the alkali liquor tank enters a resin adsorption column through a liquid preparation tank, organic impurity phenol is desorbed, desorption liquid enters a desorption liquid tank, generated tail gas enters a tail gas system, and the desorption liquid enters a decomposer for reuse.

The invention has the beneficial effects that: the material can be positively stirred through setting up the stirring leaf to this application, and the crude phenol on separation upper strata and the sodium sulfate waste water of lower floor are accelerated, and the material that separates is gushed into jar body in the feed bin, through setting up the commentaries on classics pipe, can reverse stirring material, reduces the rotational speed of material, and the crude phenol on upper strata and the sodium sulfate waste water formation layering of lower floor of being convenient for can discharge crude phenol and sodium sulfate waste water in succession.

Drawings

Fig. 1 is a schematic view of a front view in cross section.

Fig. 2 is a schematic view of a front sectional structure of the pulp sheet.

Fig. 3 is a schematic view of a cross-sectional front view of the squeegee.

Fig. 4 is a schematic top sectional structure of the elastic rod.

Fig. 5 is a schematic top sectional structure of the elastic rod and the protrusion.

Fig. 6 is a schematic view of a cross-sectional front view of a separator.

Fig. 7 is a schematic view of a cross-sectional front view of a filter sheet.

Fig. 8 is a schematic view of a cross-sectional front view of a filter cartridge.

Fig. 9 is a schematic view of a cross-sectional front view of a sphere.

Fig. 10 is a schematic perspective view of a separator and a sphere.

Fig. 11 is a schematic view of a cross-sectional front view of an airbag.

Fig. 12 is a schematic top view of the cylinder.

Fig. 13 is a schematic view of a sectional front view of the movable plate.

Fig. 14 is a schematic sectional front view of the first seal ring and the second seal ring.

Fig. 15 is a schematic sectional front view of the first push plate, the second push plate and the diaphragm.

FIG. 16 is a schematic view of a front sectional structure of a bypass pipe.

Fig. 17 is a schematic view of a sectional front view of the secondary separator tank.

Fig. 18 is a schematic view of a cross-sectional front view of the striking mechanism.

Fig. 19 is a schematic side view of the striking mechanism.

Fig. 20 is a process flow diagram one.

Fig. 21 is a process flow diagram two.

Fig. 22 is a process flow diagram three.

In the figure: 1. a tank body; 2. a top cover; 3. a gas discharge pipe; 4. an oil layer discharge pipe; 5. a water layer discharge pipe; 6. a hollow shaft; 7. a support rod; 8. a rotary pipe; 9. a first bevel gear; 10. a shaft seat; 11. a second bevel gear; 12. a rotating shaft; 13. a first motor; 14. a motor base; 15. a third bevel gear; 16. stirring the leaves; 17. a feed pipe; 18. a storage bin; 19. a liquid level gauge; 20. a thermometer; 21. a pulp board; 22. a scraper; 23. a protrusion; 24. a through hole; 25. an elastic rod; 26. a positioning sheet; 27. ball head; 28. a partition plate; 29. an inrush hole; 30. a wave-proof column; 31. a first spring; 32. a filter plate; 33. filtering holes; 34. a turning hole; 35. a vertical rod; 36. a limiting piece; 37. a T-shaped rod; 38. a filter cartridge; 39. a sphere; 40. a flow passage; 41. a U-shaped seat; 42. a traction rope; 43. an air bag; 44. a cylinder; 45. a slide block; 46. a telescopic rod; 47. an air injection pipe; 48. a sensor; 49. a spring seat; 50. a second spring; 51. a movable plate; 52. a round hole; 53. a first seal ring; 54. a second seal ring; 55. a flat plate; 56. a first push plate; 57. a guide rod; 58. a sleeve; 59. a second push plate; 60. a tension spring; 61. a diaphragm; 62. a bypass pipe; 63. a first valve; 64. a second valve; 65. a connecting pipe; 66. a secondary separation tank; 67. a circulation pipe; 68. a circulation pump; 69. a housing; 70. a striking mechanism; 71. a striking plate; 72. a flat cover; 73. a straight rod; 74. a diagonal draw string; 75. a limit rod; 76. a rotating roller; 77. a second motor; 78. an index rod.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the like or similar elements throughout or elements having like or similar functionality; the embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; the specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1, in a first embodiment, a wastewater treatment device for producing crude phenol and sodium sulfate from sodium phenolate comprises a tank body 1, wherein the tank body 1 is barrel-shaped, a top cover 2 is connected with an opening on the top surface of the tank body 1 through a flange, and the tank body 1 forms a closed structure by arranging the top cover 2; the top cover 2 is provided with a gas discharge pipe 3; an oil layer discharge pipe 4 is arranged on the upper side wall of the tank body 1, and the oil layer discharge pipe 4 is used for discharging part of crude phenol; a water layer discharge pipe 5 is arranged on the lower side wall of the tank body 1, and the water layer discharge pipe 5 is used for discharging sodium sulfate wastewater; the center of the top cover 2 is rotatably connected with a hollow shaft 6, the hollow shaft 6 is vertically downwards arranged, the side wall of the hollow shaft 6 below the top cover 2 is provided with support rods 7, the number of the support rods 7 is at least 4, and the interval angles of each support rod 7 are the same; the free end of the supporting rod 7 is provided with a rotary pipe 8, and the rotary pipe 8 is used for reversely stirring materials; a first bevel gear 9 is arranged on the side wall of the hollow shaft 6 above the top cover 2; the side wall of the hollow shaft 6 is provided with a shaft seat 10, the shaft seat 10 is U-shaped, and the hollow shaft 6 is rotationally connected with the lower horizontal section of the shaft seat 10; the vertical section of the shaft seat 10 is rotatably connected with a second bevel gear 11, and the second bevel gear 11 is meshed with the first bevel gear 9; the upper horizontal section of the shaft seat 10 is rotatably connected with a rotating shaft 12; the upper end of the rotating shaft 12 is provided with a first motor 13, the first motor 13 is connected with a motor seat 14, the motor seat 14 is fixed with the top cover 2, and meanwhile, the shaft seat 10 is also fixed on the motor seat 14; a third bevel gear 15 is arranged on the side wall of the rotating shaft 12, and the third bevel gear 15 is meshed with the second bevel gear 11; the rotating shaft 12 is vertically downwards arranged, and the side wall of the rotating shaft 12 is rotationally matched with the inner hole of the hollow shaft 6; the lower end of the rotating shaft 12 is lower than the lower end of the hollow shaft 6; the lower end of the rotating shaft 12 is provided with a stirring blade 16, and the stirring blade 16 is used for positively stirring materials and accelerating the separation of the crude phenol at the upper layer from the sodium sulfate wastewater at the lower layer; a feed pipe 17 is arranged on the side wall of the tank body 1; a feed bin 18 is arranged on the side wall of the feed pipe 17 in the tank body 1, the feed bin 18 is barrel-shaped, the feed bin 18 is concentric with the rotating shaft 12, the diameter of the feed bin 18 is smaller than that of the rotating pipe 8, the feed bin 18 is used for containing materials to be separated, and the stirring blades 16 penetrate into the feed bin 18 to stir the materials; this application can forward stir the material through setting up stirring leaf 16, accelerates the crude phenol on separation upper strata and the sodium sulfate waste water of lower floor, and the material that separates is gushed into jar body 1 in 18 from feed bin, through setting up transfer pipe 8, can reverse stirring material, reduces the rotational speed of material, and the crude phenol on upper strata and the sodium sulfate waste water formation layering of lower floor of being convenient for can discharge crude phenol and sodium sulfate waste water in succession.

As shown in fig. 1, as an optimization of the first embodiment, a liquid level meter 19 is installed on the side wall of the tank 1, and the liquid level meter 19 is used for observing the position of the oil-water separation layer.

As shown in fig. 1, as an optimization of the first embodiment, a thermometer 20 is installed on the side wall of the tank 1, and the thermometer 20 is used for displaying the temperature of the material in the tank 1.

As shown in fig. 2, as an optimization of the first embodiment, the pulp sheets 21 are mounted on the side wall of the rotary pipe 8, the number of the pulp sheets 21 is at least 4, the interval angle of each pulp sheet 21 is the same, and the rotation speed of the material can be further reduced by arranging the pulp sheets 21.

As shown in fig. 3, as an optimization of the first embodiment, a scraper 22 is installed on the side wall of the slurry plate 21, the scraper 22 is made of rubber, and the scraper 22 is used for scraping an oil layer on the inner wall of the tank body 1, so that the separation effect is prevented from being influenced by solidification of the oil layer.

As shown in fig. 4 and 5, as an optimization of the first embodiment, the inner wall of the can body 1 is provided with protrusions 23, the protrusions 23 are arranged along the circumferential direction, and each layer of protrusions 23 is arranged at equal intervals from top to bottom; projection 23 does not affect the rotation of blade 22; the side wall of the rotary tube 8 is provided with a through hole 24, an elastic rod 25 penetrates through the through hole 24, and the elastic rod 25 is fixed through a positioning sheet 26; the ball head 27 is arranged at the end part of the elastic rod 25 positioned at the inner side of the rotary pipe 8, the end part of the elastic rod 25 positioned at the outer side of the rotary pipe 8 is contacted with the bulge 23, the contacted elastic rod 25 generates vibration, the boundary between the crude phenol and the middle layer of sodium sulfate wastewater is further separated by vibration energy, and the separation effect is improved.

As shown in fig. 6, as an optimization of the first embodiment, a partition plate 28 is installed on the inner wall of the tank body 1, the partition plate 28 is located above the rotary pipe 8, an inlet hole 29 is formed in the center of the partition plate 28, the inlet hole 29 is used for penetrating through the separated crude phenol, uniformly arranged wave-preventing columns 30 are installed on the bottom surface of the partition plate 28, the wave-preventing columns 30 are quadrangular, the wave-preventing columns 30 are used for blocking the separated crude phenol, and the standing efficiency of the upper crude phenol is further improved.

As shown in fig. 7, as an optimization of the first embodiment, the top surface of the partition plate 28 is provided with at least 4 first springs 31, and each first spring 31 is equally spaced by an angle; the upper end of the first spring 31 is provided with a filter plate 32, the surface of the filter plate 32 is provided with uniformly arranged filter holes 33, the center of the filter plate 32 is provided with a rotary hole 34, and the rotary hole 34 is in clearance fit with the hollow shaft 6; the first spring 31 enables the filter plate 32 to buffer the impact of materials, and the crude phenol on the upper layer passes through the filter plate 32, so that the standing efficiency of the crude phenol on the upper layer is further improved.

As shown in fig. 8, as an optimization of the first embodiment, vertical rods 35 are slidably connected to the 4 filter holes 33 of the filter plate 32, and the lower ends of the vertical rods 35 are propped against the partition plates 28; the side wall of the vertical rod 35 is provided with a limiting piece 36, and the limiting piece 36 is propped against the bottom surface of the filter plate 32; the side wall of the vertical rod 35 above the filter plate 32 is provided with a T-shaped rod 37, the side wall of the T-shaped rod 37 is provided with a filter cartridge 38, the filter cartridge 38 is tubular in shape, and the side wall of the filter cartridge 38 is provided with uniformly arranged filter holes 33; a telescopic gap is reserved between the filter cartridge 38 and the filter plate 32; by providing the filter cartridge 38, the impact of the material can be buffered, and the upper crude phenol passes through the filter cartridge 38, thereby further improving the standing efficiency of the upper crude phenol.

As shown in fig. 9 and 10, as an optimization of the first embodiment, the filter cartridge 38 is placed in a plurality of spheres 39, the surface of the spheres 39 is provided with flow channels 40, and the directions of the crude phenol are disordered by the plurality of flow channels 40, so that the standing efficiency of the upper crude phenol is further improved.

As shown in fig. 11 and 12, as an optimization of the first embodiment, considering that the material of the feed pipe 17 is stopped when the machine is stopped, when the uppermost layer of the crude phenol is lower than the oil layer discharge pipe 4, a large amount of crude phenol flows out through the water layer discharge pipe 5, which affects the separation effect and also causes the waste of crude phenol; the inner wall of the tank body 1 is provided with a U-shaped seat 41, the U-shaped seat 41 is positioned below the storage bin 18, the bifurcation part of the U-shaped seat 41 is connected with the inner wall of the tank body 1, a plurality of U-shaped seats 41 are arranged at equal angles, and the U-shaped seat 41 can ensure the passing of sodium sulfate wastewater; the U-shaped seat 41 is connected with an air bag 43 through a traction rope 42, and the air bag 43 is inflated to adjust the liquid level of the material, so that the crude phenol on the upper layer is ensured to flow out through an oil layer discharge pipe 4; the cylinder body 44 is arranged on the outer side wall of the tank body 1, the sliding blocks 45 are connected in the cylinder body 44 in a sliding manner, the number of the sliding blocks 45 is 2, and the 2 sliding blocks 45 are symmetrically arranged; the end face of the sliding block 45 is provided with a telescopic rod 46, and the telescopic rod 46 can rotate one of a hydraulic cylinder, an air cylinder and an electric push rod; an air injection pipe 47 is arranged at the waist of the cylinder body 44, and the air injection pipe 47 extends into the tank body 1 and is connected with an air inlet of the air bag 43; the sensor 48 is installed to the outer wall of jar body 1, and sensor 48 is used for detecting the position of oil reservoir on the level gauge 19, and after the oil reservoir position descends, telescopic link 46 is used for driving slider 45 to move in opposite directions, and gasbag 43 inflation when two sliders 45 move in opposite directions, and gasbag 43 can adjust the liquid level position of crude phenol through volume change, guarantees that all crude phenols flow out through oil reservoir discharge pipe 4, has guaranteed the separation effect, and gasbag 43 reduces when two sliders 45 move in opposite directions on the contrary.

As shown in fig. 13, as an optimization of the first embodiment, spring seats 49 are installed on the inner wall of the tank body 1, the spring seats 49 are higher than the bottom surface of the storage bin 18, the number of the spring seats 49 is at least 4, the interval angle of each spring seat 49 is equal, a second spring 50 is installed on the bottom surface of the spring seat 49, a movable plate 51 is installed at the lower end of the second spring 50, and the movable plate 51 is in sliding fit with the inner wall of the tank body 1; the movable plate 51 is lower than the bottom surface of the storage bin 18, the movable plate 51 is higher than the top surface of the U-shaped seat 41, a round hole 52 is formed in the center of the movable plate 51, the round hole 52 is used for passing the lower sodium sulfate wastewater, and the diameter of the round hole 52 is smaller than that of the storage bin 18; the second spring 50 enables the movable plate 51 to buffer the impact of materials, and the lower sodium sulfate passes through the movable plate 51, so that the standing efficiency of the lower sodium sulfate wastewater is further improved; and the inflated air bag 43 can push the movable plate 51 to rise, so that the movable plate 51 is propped against the storage bin 18, and the crude phenol on the upper layer is separated from the sodium sulfate wastewater on the lower layer.

As shown in fig. 14, as an optimization of the first embodiment, a first sealing ring 53 is installed on the bottom surface of the bin 18, a second sealing ring 54 is installed on the top surface of the movable plate 51, and the first sealing ring 53 is matched with the second sealing ring 54, so that the sealing effect of the movable plate 51 is improved.

As shown in fig. 15, in the second embodiment, unlike in the first embodiment, in consideration of the fact that the air bag 43 may be caught in the circular hole 52 after being inflated, it is difficult to pull out, the U-shaped seat 41 is mounted on the inner wall of the tank body 1, the U-shaped seat 41 is located below the bin 18, the bifurcated portion of the U-shaped seat 41 is connected to the inner wall of the tank body 1, and the plurality of U-shaped seats 41 are arranged at equal angles; the U-shaped seat 41 is provided with a flat plate 55; the top surface of the flat plate 55 is provided with a first push plate 56, and the shape of the first push plate 56 is round; the first push plate 56 is provided with a guide rod 57, the guide rod 57 is vertically upwards arranged, and the guide rod 57 is cylindrical; the side wall of the guide rod 57 is connected with a sleeve 58 in a sliding manner, a second push plate 59 is arranged at the upper end of the sleeve 58, the second push plate 59 is circular in shape, and the diameter of the second push plate 59 is larger than that of the round hole 52; tension springs 60 are arranged between the first push plate 56 and the second push plate 59, the number of the tension springs 60 is at least 4, and the interval angle of each tension spring 60 is the same; the edges of the first push plate 56 and the second push plate 59 are provided with a diaphragm 61, the diaphragm 61 is in the shape of a U-shaped ring, and the first push plate 56, the second push plate 59 and the diaphragm 61 form a closed inflation chamber; the diaphragm 61 is unfolded to adjust the material liquid level, so that the upper crude phenol is ensured to flow out through the oil layer discharge pipe 4; the cylinder body 44 is arranged on the outer side wall of the tank body 1, the sliding blocks 45 are connected in the cylinder body 44 in a sliding manner, the number of the sliding blocks 45 is 2, and the 2 sliding blocks 45 are symmetrically arranged; the end face of the sliding block 45 is provided with a telescopic rod 46, and the telescopic rod 46 can rotate one of a hydraulic cylinder, an air cylinder and an electric push rod; an air injection pipe 47 is arranged at the waist of the cylinder body 44, and the air injection pipe 47 extends into the tank body 1 and is connected with an air inlet of the diaphragm 61; the sensor 48 is installed to the outer wall of jar body 1, and the sensor 48 is used for detecting the position of oil reservoir on the level gauge 19, after the oil reservoir position descends, telescopic link 46 is used for driving slider 45 to move in opposite directions, diaphragm 61 expansion when two sliders 45 move in opposite directions, diaphragm 61 can adjust the liquid level position of crude phenol through volume variation, guarantee that whole crude phenol flows out through oil reservoir discharge pipe 4, guaranteed the separation effect, diaphragm 61 shrink when two sliders 45 move away from each other on the contrary, and diaphragm 61's expansion is more stable, guarantee that second push pedal 59 can jack-up fly leaf 51, avoid the problem that gasbag 43 card goes into round hole 52.

As shown in fig. 16, in the third embodiment, unlike in the first embodiment, considering that the oil layer discharge pipe 4 can only flow out of crude phenol in the pipe diameter section, a large amount of crude phenol flows out through the water layer discharge pipe 5, which affects the separation effect and also causes the waste of crude phenol, especially when the machine is stopped; the side wall of the tank body 1 is provided with a bypass pipe 62, the bypass pipe 62 is U-shaped, the bifurcation part of the bypass pipe 62 is communicated with the tank body 1, and the upper horizontal section of the bypass pipe 62 is provided with an oil layer discharge pipe 4; the upper horizontal section of the bypass pipe 62 is provided with a first valve 63, the vertical section of the bypass pipe 62 is provided with a second valve 64, and the crude phenol discharging process is as follows: in a normal state, the first valve 63 is opened, the second valve 64 is closed, crude phenol flows out from the upper horizontal section of the bypass pipe 62 through the oil layer discharge pipe 4, and when the machine is stopped, the first valve 63 is closed, the second valve 64 is opened, crude phenol flows out (is extracted) from the lower horizontal section of the bypass pipe 62 through the oil layer discharge pipe 4, and all crude phenol can be discharged in accordance with the volume change of the air bag 43.

As shown in fig. 17, in the fourth embodiment, unlike the first embodiment, in consideration of the fact that the above-mentioned crude phenol and sodium sulfate wastewater are primarily separated, the tank 1 is connected to the secondary separation tank 66 through the connection pipe 65, the connection pipe 65 is L-shaped, the horizontal section of the connection pipe 65 is used for discharging sodium sulfate wastewater of the tank 1, the vertical section of the connection pipe 65 is located in the secondary separation tank 66, and the pipe orifice is upward; the lower side wall of the secondary separation tank 66 is provided with a water layer discharge pipe 5, and the water layer discharge pipe 5 is as high as the horizontal section of the connecting tank 65; the upper side wall of the secondary separation tank 66 is provided with a circulating pipe 67, the free end of the circulating pipe 67 extends into the tank body 1, and the circulating pipe 67 is provided with a circulating pump 68; the secondary separation tank 66 is barrel-shaped, and a cover 69 is arranged at the top opening of the secondary separation tank 66; the striking mechanism 70 is arranged in the secondary separation tank 66, the striking mechanism 70 is used for beating the sodium sulfate wastewater in the secondary separation tank 66 to excite coarse phenol particles, and the coarse phenol particles in the sodium sulfate wastewater are separated again by arranging the secondary separation tank 66, so that the separation is more sufficient.

As shown in fig. 18 and 19, as a fourth optimization, the striking mechanism 70 includes a striking plate 71, wherein the striking plate 71 is hinged to the inner wall of the secondary separation tank 66, and the striking plate 71 is in the shape of a disc; a flat cover 72 is mounted on the bottom surface of the striking plate 71; a straight rod 73 is fixedly connected to the top surface of the striking plate 71, an inclined pull rope 74 is arranged at the included angle between the straight rod 73 and the striking plate 71, and the inclined pull rope 74 is used for buffering vibration; a limit rod 75 is mounted on the side wall of the secondary separation tank 66, and the limit rod 75 is used for limiting the position of the striking plate 71 and preventing the striking plate 71 from rotating excessively; the shell 69 is provided with a rotary roller 76, the shaft end of the rotary roller 76 is provided with a second motor 77, and the second motor 77 is fixed with the secondary separation tank 66; the roll surface of the rotary roll 76 is fixedly connected with index bars 78, the number of the index bars 78 is at least 4, the interval angle of each index bar 78 is the same, the index bars 78 are used for stirring the straight bar 73 to rotate, when the index bars 78 are separated from the straight bar 73, the striking plate 71 beats the surface of sodium sulfate wastewater, the next index bar 78 continuously stirs the straight bar 73, the striking plate 71 forms continuous fear of beating action, and crude phenol in the sodium sulfate wastewater is fully separated.

As shown in fig. 20, a process for using a wastewater treatment device for producing crude phenol and sodium sulfate from sodium phenolate is further provided, which comprises the following steps: sodium sulfate wastewater enters a wastewater cooler to be cooled to below 35 ℃; the cooled sodium sulfate wastewater enters a tank body 1 of an oil-water separator, the generated tail gas enters a tail gas system through a gas discharge pipe 3, the separated upper layer crude phenol enters a crude phenol tank, the separated sodium sulfate enters a sodium sulfate middle tank, the crude phenol secondarily separated by the sodium sulfate middle tank enters the crude phenol tank, the sodium sulfate secondarily separated by the sodium sulfate middle tank enters a sodium sulfate collecting tank, the COD value of the wastewater after dephenolization is about 30000mg/L, and the phenol content is 7000mg/L; pumping sodium sulfate into a 4-level resin adsorption column through a resin adsorption feeding pump, removing organic impurity phenol through resin adsorption, reducing the phenol content to 100mg/L, reducing the COD value to 400-500mg/L, and then entering a sodium sulfate tank after adsorption; then sodium sulfate enters a neutralization tank, and alkali liquor in an alkali high-level tank enters the neutralization tank, and the alkali liquor and sodium sulfate undergo neutralization reaction, and the pH value is adjusted to 6-7; filtering by a filter press to obtain mechanical impurities, filtering by an active carbon filter, and then feeding the mechanical impurities into a sodium sulfate clear liquid tank; alkali liquor in the alkali liquor tank enters a resin adsorption column through a liquid preparation tank, organic impurity phenol is desorbed, desorption liquid enters a desorption liquid tank, generated tail gas enters a tail gas system, and the desorption liquid enters a decomposer for reuse.

As shown in fig. 21, the sodium sulfate clear solution from the sodium sulfate clear solution tank enters an MVR evaporation device, and sodium sulfate is dried by a fluidized bed dryer to obtain a sodium sulfate product.

As shown in fig. 22, further, the tail gas from each storage tank enters the 2-stage tail gas absorption tower for treatment and is discharged through a chimney.

The sodium sulfate wastewater treatment process can obtain biochemical water and sodium sulfate products, the treatment process adopts the process of extraction or resin adsorption to remove organic impurity phenol, then neutralization is carried out, the pH value is adjusted to 6-7, then MVR is carried out to evaporate salt, sodium sulfate is dried by a fluidized bed to obtain the sodium sulfate products, and the sodium sulfate wastewater treatment process is mainly used for manufacturing sodium silicate, glass, enamel, paper pulp, refrigeration mixture, detergent, drying agent, dye diluent, analytical chemical reagent, medical products, feed and the like; has very important economic significance for increasing the yield and efficiency of enterprises.

Although the present invention has been described in detail with reference to the foregoing examples, it will be apparent to those skilled in the art that the foregoing embodiments may be modified and practiced in the field of the invention, and that certain modifications, equivalents, improvements and substitutions may be made thereto without departing from the spirit and principles of the invention.

Claims

1. The utility model provides an with sodium phenolate production crude phenol and sodium sulfate effluent treatment plant, includes a jar body (1), its characterized in that: a top cover (2) is arranged at the top opening of the tank body (1); a gas discharge pipe (3) is arranged on the top cover (2); an oil layer discharge pipe (4) is arranged on the upper side wall of the tank body (1); the lower side wall of the tank body (1) is provided with a water layer discharge pipe (5); the center of the top cover (2) is rotationally connected with a hollow shaft (6), and the side wall of the hollow shaft (6) is provided with a supporting rod (7); the free end of the supporting rod (7) is provided with a rotating pipe (8), and the rotating pipe (8) is used for reversely stirring materials; the side wall of the hollow shaft (6) is provided with a first bevel gear (9); the side wall of the hollow shaft (6) is rotationally connected with a shaft seat (10); the vertical section of the shaft seat (10) is rotationally connected with a second bevel gear (11), and the second bevel gear (11) is meshed with the first bevel gear (9); the upper horizontal section of the shaft seat (10) is rotationally connected with a rotating shaft (12); the upper end of the rotating shaft (12) is provided with a first motor (13); a third bevel gear (15) is arranged on the side wall of the rotating shaft (12), and the third bevel gear (15) is meshed with the second bevel gear (11); the side wall of the rotating shaft (12) is rotationally matched with the inner hole of the hollow shaft (6); the lower end of the rotating shaft (12) is provided with a stirring blade (16), and the stirring blade (16) is used for positively stirring materials; the side wall of the tank body (1) is provided with a feed pipe (17); the side wall of a feed pipe (17) positioned in the tank body (1) is provided with a feed bin (18), the feed bin (18) is used for containing materials to be separated, and the stirring blades (16) penetrate into the feed bin (18) to stir the materials.

2. The wastewater treatment device for producing crude phenol and sodium sulfate by using sodium phenolate as claimed in claim 1, wherein the wastewater treatment device comprises: the side wall of the rotary pipe (8) is provided with a pulp board (21), and the side wall of the pulp board (21) is provided with a scraping plate (22).

3. The wastewater treatment device for producing crude phenol and sodium sulfate by using sodium phenolate as claimed in claim 1, wherein the wastewater treatment device comprises: the inner wall of the tank body (1) is provided with a bulge (23); the side wall of the rotary pipe (8) is provided with a through hole (24), an elastic rod (25) is penetrated in the through hole (24), and the elastic rod (25) is fixed by a locating piece (26); the end part of the elastic rod (25) positioned at the inner side of the rotary pipe (8) is provided with a ball head (27), and the end part of the elastic rod (25) positioned at the outer side of the rotary pipe (8) is contacted with the bulge (23).

4. The wastewater treatment device for producing crude phenol and sodium sulfate by using sodium phenolate as claimed in claim 1, wherein the wastewater treatment device comprises: the inner wall of the tank body (1) is provided with a baffle plate (28), the baffle plate (28) is positioned above the rotary pipe (8), the center of the baffle plate (28) is provided with an inflow hole (29), the inflow hole (29) is used for penetrating through separated crude phenol, and the bottom surface of the baffle plate (28) is provided with uniformly arranged wave-proof columns (30).

5. The wastewater treatment device for producing crude phenol and sodium sulfate by using sodium phenolate as claimed in claim 1, wherein the wastewater treatment device comprises: the top surface of the baffle plate (28) is provided with a first spring (31); the upper end of the first spring (31) is provided with a filter plate (32), the surface of the filter plate (32) is provided with uniformly arranged filter holes (33), the center of the filter plate (32) is provided with a rotary hole (34), and the rotary hole (34) is in clearance fit with the hollow shaft (6).

6. The wastewater treatment device for producing crude phenol and sodium sulfate by using sodium phenolate as claimed in claim 1, wherein the wastewater treatment device comprises: the inner wall of the tank body (1) is provided with a U-shaped seat (41), and the U-shaped seat (41) is positioned below the storage bin (18); an air bag (43) is connected to the U-shaped seat (41) through a traction rope (42), and the air bag (43) is expanded to adjust the liquid level of the material; the outer side wall of the tank body (1) is provided with a cylinder body (44), sliding blocks (45) are connected in the cylinder body (44), the number of the sliding blocks (45) is 2, and the 2 sliding blocks (45) are symmetrically arranged; the end face of the sliding block (45) is provided with a telescopic rod (46); an air injection pipe (47) is arranged at the waist of the cylinder body (44), and the air injection pipe (47) stretches into the tank body (1) to be connected with an air inlet of the air bag (43); the side wall of the tank body (1) is provided with a liquid level meter (19), and the liquid level meter (19) is used for observing the position of the oil-water separation layer; the outer wall of the tank body (1) is provided with a sensor (48), and the sensor (48) is used for detecting the position of an oil layer on the liquid level meter (19).

7. The wastewater treatment device for producing crude phenol and sodium sulfate by using sodium phenolate as claimed in claim 1, wherein the wastewater treatment device comprises: a spring seat (49) is arranged on the inner wall of the tank body (1), a second spring (50) is arranged on the bottom surface of the spring seat (49), a movable plate (51) is arranged at the lower end of the second spring (50), and the movable plate (51) is in sliding fit with the inner wall of the tank body (1); a round hole (52) is formed in the center of the movable plate (51), the round hole (52) is used for passing lower sodium sulfate wastewater, the inflated air bag (43) can push the movable plate (51) to ascend, the movable plate (51) is propped against the storage bin (18), and the upper crude phenol and the lower sodium sulfate wastewater are separated.

8. The wastewater treatment device for producing crude phenol and sodium sulfate by using sodium phenolate as claimed in claim 1, wherein the wastewater treatment device comprises: a bypass pipe (62) is arranged on the side wall of the tank body (1), the shape of the bypass pipe (62) is U-shaped, and an oil layer discharge pipe (4) is arranged at the upper horizontal section of the bypass pipe (62); the upper horizontal section of the bypass pipe (62) is provided with a first valve (63), and the vertical section of the bypass pipe (62) is provided with a second valve (64).

9. The wastewater treatment device for producing crude phenol and sodium sulfate by using sodium phenolate as claimed in claim 1, wherein the wastewater treatment device comprises: the tank body (1) is connected with a secondary separation tank (66) through a connecting pipe (65); the lower side wall of the secondary separation tank (66) is provided with a water layer discharge pipe (5); the upper side wall of the secondary separation tank (66) is provided with a circulating pipe (67), the free end of the circulating pipe (67) extends into the tank body (1), and the circulating pipe (67) is provided with a circulating pump (68); a top opening of the secondary separation tank (66) is provided with a cover shell (69); a beating mechanism (70) is arranged in the secondary separation tank (66), and the beating mechanism (70) is used for beating sodium sulfate wastewater in the secondary separation tank (66) to excite coarse phenol particles.

10. A process for using the apparatus for treating wastewater from producing crude phenol and sodium sulfate from sodium phenolate as claimed in any one of claims 1 to 9, comprising: the method comprises the following steps: sodium sulfate wastewater enters a wastewater cooler for cooling; the cooled sodium sulfate wastewater enters a tank body (1) of an oil-water separator, the generated tail gas enters a tail gas system through a gas discharge pipe (3), the separated upper layer crude phenol enters a crude phenol tank, the separated sodium sulfate enters a sodium sulfate middle tank, the crude phenol secondarily separated by the sodium sulfate middle tank enters the crude phenol tank, and the sodium sulfate secondarily separated by the sodium sulfate middle tank enters a sodium sulfate collecting tank; pumping sodium sulfate into a 4-level resin adsorption column through a resin adsorption feeding pump, removing organic impurity phenol through resin adsorption, and then entering a sodium sulfate tank after adsorption; then sodium sulfate enters a neutralization tank, and alkali liquor in an alkali high-level tank enters the neutralization tank to perform neutralization reaction with sodium sulfate; filtering by a filter press to obtain mechanical impurities, filtering by an active carbon filter, and then feeding the mechanical impurities into a sodium sulfate clear liquid tank; the alkali liquor in the alkali liquor tank enters a resin adsorption column through a liquor preparation tank, organic impurity phenol is desorbed, desorption liquor enters a desorption liquid tank, generated tail gas enters a tail gas system, and the desorption liquor enters a decomposer for reuse; and (3) feeding the sodium sulfate clear liquid discharged from the sodium sulfate clear liquid tank into an MVR evaporation device, and drying the sodium sulfate by a fluidized bed dryer to obtain a sodium sulfate product.