Waste acid solution treatment device in production process of 2-ethyl anthraquinone

Abstract

The utility model discloses a waste acid liquid treatment device in a 2-ethyl anthraquinone production process. The waste acid liquid treatment device comprises a neutralization tank, a Fenton oxidation pond and a biochemical pond which are communicated, a Fenton reagent liquid distribution pipe and a multi-layer annular water distribution pipe arranged on the outer side of the Fenton reagent liquid distribution pipe in a sleeving mode are arranged in the Fenton oxidation pond, a plurality of water outlet pipes with outlets facing the Fenton reagent liquid distribution pipe are arranged in the circumferential direction of the annular water distribution pipe, the multi-layer annular water distribution pipe is communicated with the water inlet pipe, and a catalyst packing layer is further arranged in the Fenton oxidation pond; the biochemical pool comprises an impurity removal area, an anaerobic area and an aerobic area which are communicated, an air outlet disc is arranged at the bottom of the aerobic area, the bottom of the air outlet disc is communicated with a buffer pipe, the buffer pipe is communicated with an air inlet pipe through a rotary joint, a driven gear sleeves the outer side of the buffer pipe, and the driven gear is also kneaded with a driving gear; the driving gear is driven by a first motor arranged on the outer side of the biochemical pool. The device is good in treatment effect, capable of effectively preventing the acid wastewater from polluting the environment and low in treatment cost.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a waste acid solution treatment device in the production process of 2-ethylanthraquinone. Background Art

[0002] 2-Ethylanthraquinone is a fine chemical product, mainly used to prepare the working fluid in the production process of hydrogen peroxide. It can also be used in the dye industry, photocurable resins and photosensitive polymerization. The main synthesis method of 2-Ethylanthraquinone is to use phthalic anhydride and ethylbenzene as raw materials, aluminum chloride as a catalyst, and then the obtained product is acidified and then a closed-loop reaction occurs. A large amount of acidic wastewater will be generated in the above production process. If it is not treated in time, it will cause environmental pollution.

[0003] At present, the methods for treating acidic wastewater mainly adopt adsorption method, membrane separation method, etc. Although the above methods can treat acidic wastewater well, the treatment cost is high. In view of the above technical problems, it is necessary to provide a waste acid liquid treatment device with low cost and good treatment effect. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in view of the deficiencies in the prior art, a device for treating waste acid liquid in the production process of 2-ethylanthraquinone is provided, the treatment effect of the device can effectively prevent acid waste water from polluting the environment, and the treatment cost is low.

[0005] In order to solve the above technical problems, the technical solution of the utility model is:

[0006] A waste acid liquid treatment device in the production process of 2-ethylanthraquinone comprises a connected neutralization tank, a Fenton oxidation tank and a biochemical tank; a Fenton reagent liquid distribution pipe and a multi-layer annular water distribution pipe sleeved on the outside of the Fenton reagent liquid distribution pipe are arranged in the Fenton oxidation tank, a plurality of outlet pipes with outlets facing the Fenton reagent liquid distribution pipe are arranged circumferentially on the annular water distribution pipe, the multi-layer annular water distribution pipes are all connected to a water inlet pipe, and a catalyst packing layer is also arranged in the Fenton oxidation tank; the biochemical tank comprises a connected impurity removal zone, an anaerobic zone and an aerobic zone, an air outlet disk is arranged at the bottom of the aerobic zone, a buffer tube is connected to the bottom of the air outlet disk, the buffer tube is connected to the air inlet pipe through a rotary joint, a driven gear is sleeved on the outside of the buffer tube, a driving gear is kneaded on the driven gear, and the driving gear is driven by a first motor arranged on the outside of the biochemical tank.

[0007] As an improved technical solution, the bottom of the Fenton reagent liquid distribution tube is sealed, and a plurality of liquid outlets are arranged on the side wall of the Fenton reagent liquid distribution tube.

[0008] As an improved technical solution, a stirring device is arranged in the neutralization tank, and the stirring device includes a second motor, a stirring shaft connected to the second motor, and a plurality of first stirring rods arranged on the stirring shaft.

[0009] As an improved technical solution, an arc-shaped stirring rod is arranged at the bottom of the stirring shaft, and a plurality of auxiliary stirring blades are arranged at the bottom of the arc-shaped stirring rod.

[0010] As an improved technical solution, a plurality of turbulent holes are provided on the auxiliary stirring blade.

[0011] As an improved technical solution, a plurality of transverse filter screens and a plurality of longitudinal filter screens are arranged in the impurity removal area.

[0012] As an improved technical solution, the biochemical pool is further provided with a flexible scraper on the inner wall of the aerobic zone, and a brush abutting against the gas outlet plate is provided at the bottom of the flexible scraper.

[0013] As an improved technical solution, a decanter is provided at the water outlet of the aerobic zone.

[0014] As an improved technical solution, a COD detector is provided on the outlet pipe connected to the aerobic zone, the outlet pipe is respectively connected to a drain pipe and a return pipe, the return pipe is connected to the anaerobic zone, and a first electric valve and a second electric valve are provided on the drain pipe and the return pipe, and the first electric valve and the second electric valve are interlocked with the COD detector.

[0015] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0016] The utility model provides a waste acid liquid treatment device in the production process of 2-ethylanthraquinone, comprising a connected neutralization tank, a Fenton oxidation tank and a biochemical tank, and greatly improves the treatment effect of the waste acid liquid by performing neutralization, Fenton oxidation and biochemical treatment on the waste acid liquid.

[0017] The Fenton oxidation tank of the device is provided with a Fenton reagent liquid distribution pipe and a multi-layer annular water distribution pipe sleeved on the outside of the Fenton reagent liquid distribution pipe. The annular water distribution pipe is circumferentially provided with a plurality of water outlet pipes with outlets facing the Fenton reagent liquid distribution pipe. The multi-layer annular water distribution pipes are all connected to the water inlet pipe. The neutralized waste liquid evenly enters the Fenton oxidation tank through the water outlet pipe and fully contacts and reacts with the Fenton reagent discharged from the Fenton reagent liquid distribution pipe, which greatly improves the utilization rate of the Fenton reagent. On the one hand, it improves the treatment effect of the waste liquid, and on the other hand, it also reduces the treatment cost of the waste liquid.

[0018] The device is provided with an air outlet plate at the bottom of the aerobic zone, the bottom of the air outlet plate is connected with a buffer pipe, and the buffer pipe is connected with the air inlet pipe through a rotary joint. The setting of the air outlet plate greatly improves the aeration efficiency, thereby improving the waste liquid treatment effect.

[0019] The device also provides a stirring device in the neutralization tank, and an arc-shaped stirring rod is provided at the bottom of the stirring shaft, a plurality of auxiliary stirring blades are provided at the bottom of the arc-shaped stirring rod, and a plurality of turbulent holes are provided on the auxiliary stirring blades. The above arrangement can effectively improve the neutralization efficiency, thereby improving the waste acid liquid treatment effect.

[0020] The biochemical pool of the device is also provided with a flexible scraper on the inner wall of the aerobic zone, and a brush is provided at the bottom of the flexible scraper to abut against the gas outlet plate. The combined setting of the flexible scraper and the brush prevents impurities from clogging the gas outlet plate and ensures the smooth progress of the aeration process.

[0021] A COD detector is arranged on the outlet pipe connected to the aerobic zone of the device, the outlet pipe is respectively connected to a drain pipe and a return pipe, the return pipe is connected to the anaerobic zone, a first electric valve and a second electric valve are arranged on the drain pipe and the return pipe, the first electric valve, the second electric valve and the COD detector are interlocked, the COD detector can monitor the COD content in the treated wastewater in real time, if the content is too high, the second electric valve is opened, and the wastewater re-enters the anaerobic zone for treatment, if the COD content reaches the standard, the first electric valve is opened and the wastewater is directly discharged, the above arrangement ensures the treatment effect of the wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0024] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 3 It is a schematic diagram of the structure of the Fenton reagent liquid distribution pipe and the annular water distribution pipe;

[0026] Figure 4 It is a schematic diagram of the structure of the gas outlet plate and the flexible scraper;

[0027] In the figure, 1, neutralization tank; 2, Fenton oxidation tank; 3, biochemical tank; 4, Fenton reagent liquid distribution pipe; 5, annular water distribution pipe; 6, liquid outlet; 7, water outlet pipe; 8, water inlet pipe; 9, catalyst packing layer; 10, impurity removal area; 11, anaerobic area; 12, aerobic area; 13, gas outlet plate; 14, buffer pipe; 15, air inlet pipe; 16, driven gear; 17, driving gear; 18, first motor drive; 19, decanter; 20, second motor; 21, stirring shaft; 22, first stirring rod; 23, arc stirring rod; 24, auxiliary stirring blade; 25, spoiler hole; 26, horizontal filter screen; 27, vertical filter screen; 28, flexible scraper; 29, brush; 30, COD detector; 31, drain pipe; 32, return pipe; 33, first electric valve; 34, second electric valve; 35, circulation pump. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0031] Example 1

[0032] like Figures 1 to 4 As shown, a waste acid liquid treatment device in the production process of 2-ethylanthraquinone includes a neutralization tank 1, a Fenton oxidation tank 2 and a biochemical tank 3 connected to each other; a Fenton reagent liquid distribution pipe 4 and a multi-layer annular water distribution pipe 5 sleeved on the outside of the Fenton reagent liquid distribution pipe 4 are arranged in the Fenton oxidation tank 2, the bottom of the Fenton reagent liquid distribution pipe 4 is sealed, and a plurality of liquid outlets 6 are arranged on the side wall of the Fenton reagent liquid distribution pipe 4; the annular water distribution pipe 5 is circumferentially provided with a plurality of water outlet pipes 7 with outlets facing the Fenton reagent liquid distribution pipe 4, the multi-layer annular water distribution pipes 5 are all connected to a water inlet pipe 8, and a catalyst packing layer 9 is also arranged in the Fenton oxidation tank 2;

[0033] The biochemical pool 3 includes a connected impurity removal zone 10, an anaerobic zone 11 and an aerobic zone 12. The bottom of the aerobic zone 12 is provided with an air outlet plate 13. The bottom of the air outlet plate 13 is connected with a buffer pipe 14. The buffer pipe 14 is connected with an air inlet pipe 15 through a rotary joint (not shown in the figure). A driven gear 16 is sleeved on the outside of the buffer pipe 14. The driven gear 16 is also kneaded with a driving gear 17. The driving gear 17 is driven by a first motor 18 arranged on the outside of the biochemical pool 3. A decanter 19 is provided at the water outlet of the aerobic zone 12.

[0034] Through the above technical scheme, the waste acid liquid is neutralized in the neutralization tank 1 and enters the Fenton oxidation tank 2 through the water inlet pipe 8, and then is diverted through the multi-layer annular water distribution pipe 5, and finally is evenly discharged from the water outlet pipe 7. The Fenton reagent is discharged from the liquid outlet 6 on the Fenton reagent liquid distribution pipe 4 and is fully mixed with the waste liquid, thereby improving the utilization rate of the Fenton reagent. The treated waste liquid enters the biochemical pool 3 for treatment, thereby improving the treatment effect of the waste acid liquid.

[0035] Further, in this embodiment, if Figure 1 and Figure 2 As shown, a stirring device is arranged in the neutralization tank 1, and the stirring device includes a second motor 20, a stirring shaft 21 connected to the second motor 20, and a plurality of first stirring rods 22 arranged on the stirring shaft 21. The above arrangement improves the neutralization efficiency of the waste acid liquid.

[0036] Further, in this embodiment, if Figure 1 and Figure 2 As shown, an arc-shaped stirring rod 23 is provided at the bottom of the stirring shaft 21, and a plurality of auxiliary stirring blades 24 are provided at the bottom of the arc-shaped stirring rod 23; further, a plurality of spoiler holes 25 are provided on the auxiliary stirring blades 24. The combined arrangement of the auxiliary stirring blades 24 and the plurality of spoiler holes 25 allows the liquid in the neutralization tank 1 to be mixed more fully, thereby improving the neutralization efficiency.

[0037] Further, in this embodiment, if Figure 1 As shown, a plurality of transverse filter screens 26 and a plurality of longitudinal filter screens 27 are arranged in the impurity removal area 10. The above arrangement can preliminarily remove solids in the treated wastewater to facilitate subsequent treatment.

[0038] Further, in this embodiment, if Figure 1 and Figure 4As shown, the biochemical pool 3 is further provided with a flexible scraper 28 on the inner wall of the aerobic zone 12, and a brush 29 is provided at the bottom of the flexible scraper 28 to abut against the gas outlet plate 13. The gas outlet plate 13 rotates under the joint action of the driven gear 16, the driving gear 17 and the first motor, and moves relative to the brush 29 on the flexible scraper 28 during the rotation, so that impurities on the surface of the gas outlet plate 13 are removed in time to prevent the gas outlet holes on the surface of the gas outlet plate 13 from being blocked.

[0039] Further, in this embodiment, if Figure 1 As shown, a COD detector 30 is provided on the outlet pipe 7 connected to the aerobic zone 12, and the outlet pipe 7 is respectively connected to a drain pipe 31 and a return pipe 32, and the return pipe 32 is connected to the anaerobic zone 11. The drain pipe 31 and the return pipe 32 are provided with a first electric valve 33 and a second electric valve 34, and the first electric valve 33 and the second electric valve 34 are interlocked with the COD detector 30. The COD detector 30 can monitor the COD content in the treated wastewater in real time. If the COD content is too high, the second electric valve 34 is opened, and under the action of the circulating pump 35, the wastewater enters the anaerobic zone 11 again for treatment. After the COD reaches the standard, the first electric valve 33 is opened for direct discharge.

[0040] In addition, it should be understood that after reading the contents taught in the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. A waste acid liquid treatment device in the production process of 2-ethylanthraquinone, characterized in that: It comprises a connected neutralization tank, a Fenton oxidation tank and a biochemical tank; the Fenton oxidation tank is provided with a Fenton reagent liquid distribution pipe and a multi-layer annular water distribution pipe sleeved on the outside of the Fenton reagent liquid distribution pipe, the annular water distribution pipe is circumferentially provided with a plurality of water outlets facing the Fenton reagent liquid distribution pipe, the multi-layer annular water distribution pipes are all connected to the water inlet pipe, and a catalyst packing layer is also provided in the Fenton oxidation tank; the biochemical tank comprises a connected impurity removal zone, an anaerobic zone and an aerobic zone, the bottom of the aerobic zone is provided with an air outlet disk, the bottom of the air outlet disk is connected with a buffer tube, the buffer tube is connected with the air inlet pipe through a rotary joint, the outer side of the buffer tube is sleeved with a driven gear, the driven gear is also kneaded with a driving gear, and the driving gear is driven by a first motor arranged on the outside of the biochemical tank.

2. The waste acid liquid treatment device in the 2-ethylanthraquinone production process according to claim 1, characterized in that: The bottom of the Fenton reagent liquid distribution tube is sealed, and a plurality of liquid outlets are arranged on the side wall of the Fenton reagent liquid distribution tube.

3. The waste acid liquid treatment device in the 2-ethylanthraquinone production process according to claim 1, characterized in that: A stirring device is arranged in the neutralization tank, and the stirring device comprises a second motor, a stirring shaft connected to the second motor, and a plurality of first stirring rods arranged on the stirring shaft.

4. The waste acid liquid treatment device in the 2-ethylanthraquinone production process according to claim 3, characterized in that: An arc-shaped stirring rod is arranged at the bottom of the stirring shaft, and a plurality of auxiliary stirring blades are arranged at the bottom of the arc-shaped stirring rod.

5. The waste acid liquid treatment device in the 2-ethylanthraquinone production process according to claim 4, characterized in that: The auxiliary stirring blade is provided with a plurality of flow disturbance holes.

6. The waste acid liquid treatment device in the 2-ethylanthraquinone production process according to claim 1, characterized in that: A plurality of transverse filter screens and a plurality of longitudinal filter screens are arranged in the impurity removal area.

7. The waste acid liquid treatment device in the 2-ethylanthraquinone production process according to claim 1, characterized in that: The biochemical pool is also provided with a flexible scraper on the inner wall of the aerobic zone, and a brush abutting against the gas outlet plate is provided at the bottom of the flexible scraper.

8. The waste acid liquid treatment device in the 2-ethylanthraquinone production process according to claim 1, characterized in that: A decanter is arranged at the water outlet of the aerobic zone.

9. The device for treating waste acid liquid in the production process of 2-ethylanthraquinone according to claim 1, characterized in that: A COD detector is arranged on the outlet pipe connected to the aerobic zone, the outlet pipe is respectively connected to a drain pipe and a return pipe, the return pipe is connected to the anaerobic zone, a first electric valve and a second electric valve are arranged on the drain pipe and the return pipe, and the first electric valve and the second electric valve are interlocked with the COD detector.

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