Maleic anhydride sewage treatment device capable of collecting trace DBP

Abstract

The utility model discloses a maleic anhydride sewage treatment device capable of collecting trace DBP (dibutyl phthalate), which comprises a sewage pool, a first collecting tank, a second collecting tank, a DBP collecting component and a driving device, the first collecting tank and the second collecting tank are respectively arranged at two ends of the bottom of the sewage pool, and the depth of the first collecting tank and the depth of the second collecting tank are larger than that of the sewage pool. The first collecting tank and the second collecting tank which are deeper are arranged at the two ends of the bottom of the sewage tank, and are matched with the DBP collecting assembly and the driving device, so that trace DBP separated from sewage by standing can be collected.

Description

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[0001] The utility model relates to the technical field of chemical equipment, in particular to a maleic anhydride sewage treatment device with the function of collecting trace DBP. Background Art

[0002] Maleic anhydride is the abbreviation of maleic acid anhydride, and it is currently mainly prepared by the process of n-butane oxidation. The maleic anhydride prepared by this process needs to use the organic solvent dibutyl phthalate (DBP) as an absorbent for absorption. However, DBP is toxic and harmful to the human body, can persist in the environment for a long time, has toxic effects on reproduction and development, and can cause endocrine disorders; at the same time, (DBP) has low biodegradability and is difficult to treat. Therefore, the most effective method is for maleic anhydride aquatic product enterprises to separate DBP as much as possible during sewage treatment and send it to a sewage treatment plant with treatment capacity for centralized targeted treatment. Content of the Utility Model

[0003] In view of this, the utility model provides a maleic anhydride sewage treatment device with the function of collecting trace DBP, which can separate and collect trace DBP contained in the sewage discharged during maleic anhydride production.

[0004] A maleic anhydride sewage treatment device with the function of collecting trace DBP includes a sewage pool, a first collection tank and a second collection tank respectively arranged at both ends of the bottom of the sewage pool, as well as a DBP collection component and a driving device. The depths of the first collection tank and the second collection tank are greater than the depth of the sewage pool. The sewage pool includes a first pool wall, a second pool wall, a third pool wall, and a fourth pool wall. Fixing plates are respectively arranged at the four corners of the first pool wall and the second pool wall. Two fixing plates on the same pool wall are in a group, and an upper guide rail and a lower guide rail are respectively arranged on each group of fixing plates. The upper guide rail and the lower guide rail are in a "return" shape.

[0005] Further, the DBP collection component includes a brush plate and two connecting rods arranged on the brush plate. A first cross bar and a second cross bar are arranged on the connecting rods.

[0006] Further, fixing pieces are respectively arranged on the first cross bar and the second cross bar.

[0007] Further, upper sliding rods and lower sliding rods are respectively arranged on the two connecting rods. The upper sliding rods are arranged through the upper guide rails, and the lower sliding rods are arranged through the lower guide rails.

[0008] Further, a water inlet pipe is arranged on the fourth pool wall, and the water inlet pipe is fixed by a plurality of fixing brackets arranged on the fourth pool wall.

[0009] Further, a cylinder mounting platform is further arranged in the middle near the upper end of the fourth pool wall. The cylinder mounting platform is provided with a cylinder fixing bracket, and a cylinder is fixed on the cylinder fixing bracket.

[0010] Further, the air cylinder comprises a cylinder body, a first telescopic rod and a second telescopic rod, and the second telescopic rod is connected through a fixing member and a first horizontal rod.

[0011] Further, the upper guide rail and the lower guide rail are arranged in parallel, upper slide rods and lower slide rods are respectively arranged on the two connecting rods, the upper slide rods are arranged through the upper guide rail, the lower slide rods are arranged through the lower guide rail, sleeves are arranged at positions where the upper slide rods pass through the upper guide rail, bearings are arranged in the sleeves, the sleeves are arranged in tracks of the upper guide rail, and similarly, sleeves are arranged at positions where the lower slide rods pass through the lower guide rail, and the sleeves are arranged in tracks of the lower guide rail.

[0012] Further, the sewage treatment device is further provided with a DBP discharging pipeline, comprising first and second DBP liquid outlet pipes arranged at bottoms of the first and second collecting grooves respectively, a first valve arranged on the first DBP liquid outlet pipe, a second valve arranged on the second DBP liquid outlet pipe, a first three-way pipe communicated with the first and second DBP liquid outlet pipes, a second water outlet pipe connected with another outlet of the first three-way pipe, a second three-way pipe arranged on the second water outlet pipe, a flushing pipeline connected with one outlet of the second three-way pipe, a third valve arranged on the flushing pipeline, a fourth valve arranged on an outlet of the second water outlet pipe passing through the second three-way pipe, and a small flow rate water pump communicated with an outlet of the fourth valve.

[0013] The beneficial effects of the present application are as follows:

[0014] The utility model discloses a kind of order maleic anhydride sewage treatment devices with collecting trace DBP, by being provided with deeper first collecting groove and second collecting groove at the bottom of sewage pool two ends, cooperate DBP collection component and driving device, trace DBP in sewage can be collected and separated. BRIEF DESCRIPTION OF DRAWINGS

[0015] The present application will be further described below in conjunction with the drawings and examples.

[0016] Figure 1 The structure diagram of the order maleic anhydride sewage treatment device with collecting trace DBP provided by the present application is shown.

[0017] Figure 2 Another structure diagram of the order maleic anhydride sewage treatment device with collecting trace DBP provided by the present application is shown.

[0018] Figure 3 Still another structure diagram of the order maleic anhydride sewage treatment device with collecting trace DBP provided by the present application is shown.

[0019] Figure 4 ForFigure 1 Enlarged view of the middle A;

[0020] Figure 5 For Figure 1 Schematic view of the brush plate structure.

[0021] In the figure: 100, the malonic anhydride sewage treatment device with collecting trace DBP; 1, sewage pool; 11, first pool wall; 111, fixed plate; 112, upper guide rail; 113, lower guide rail; 114, drain pipe; 12, second pool wall; 121, support strip; 1211, stop block; 13, third pool wall; 14, fourth pool wall; 141, water inlet pipe; 1411, fixing frame; 142, air cylinder mounting table; 143, air cylinder fixing frame; 144, air cylinder; 1441, cylinder body; 1442, first telescopic rod; 1443, second telescopic rod; 145, air cylinder control cabinet; 2, first collecting groove; 21, first DBP liquid outlet pipe; 211, first valve; 22, first tee; 23, second water outlet pipe; 24, second tee; 25, flushing pipeline; 251, third valve; 26, fourth valve; 3, second collecting groove; 31, second DBP liquid outlet pipe; 311, second valve; 4, DBP collecting assembly; 41, brush plate; 412, brush head; 42, connecting rod; 421, upper sliding rod; 422, lower sliding rod; 423, sleeve; 43, first cross rod; 44, second cross rod; 45, fixing piece. DETAILED DESCRIPTION

[0022] The present application will now be described in detail by reference to the drawings. The figure is a simplified schematic diagram, and only illustrates the basic structure of the present application in a schematic manner, and therefore only shows the components related to the present application.

[0023] In the process of preparing malonic anhydride by n-butane oxidation, water washing is needed for DBP recycling, to remove acid substances generated by side reactions in the oxidation process. Most of the acid substances are slightly soluble in water. After water washing, solid is precipitated, and after centrifugal recovery of solid organic matter, trace DBP remains in the wastewater discharged. The specific gravity of DBP is slightly larger than that of water, and when stored in the sewage pool, it will slowly sink to the bottom of the pool, but the amount is very small.

[0024] Reference Figures 1-4As shown, this utility model provides a maleic anhydride wastewater treatment device 100 for collecting trace amounts of DBP. The device includes a wastewater tank 1, a first collection tank 2 and a second collection tank 3 respectively disposed at both ends of the bottom of the wastewater tank 1, a DBP collection assembly 4, and a driving device. The first collection tank 2 and the second collection tank 3 are respectively disposed at both ends of the wastewater tank 1, and the depth of the first collection tank 2 and the second collection tank 3 is greater than the depth of the wastewater tank 1. Thus, with the assistance of the driving device, the DBP collection assembly 4 can push the DBP settled at the bottom of the wastewater tank 1 into the first collection tank 2 or the second collection tank 3 for collection.

[0025] In some embodiments, the wastewater tank 1 is rectangular in shape and includes a first tank wall 11, a second tank wall 12, a third tank wall 13, and a fourth tank wall 14. Fixing plates 111 are respectively provided at the four corners of the first and second tank walls 11 and 12. Two fixing plates 111 on the same tank wall form a group, and each group of fixing plates 111 is provided with an upper guide rail 112 and a lower guide rail 113, which are in a U-shape. An inlet pipe 141 is provided on the fourth tank wall 14, which can transport wastewater containing trace amounts of DBP into the wastewater tank 1. The inlet pipe 141 is fixed by a fixing bracket 1411 provided on the fourth tank wall 14, and there can be multiple fixing brackets 1411. Near the upper middle part of the fourth pool wall 14, a cylinder mounting platform 142 is also provided. A cylinder 144 is fixed to the cylinder mounting platform 142 via a cylinder fixing bracket 143. The cylinder 144 includes a cylinder body 1441, a first telescopic rod 1442, and a second telescopic rod 1443. The first telescopic rod 1442 and the second telescopic rod 1443 can extend and retract within the cylinder body 1441. The DBP collection assembly 4 includes a brush plate 41 and two connecting rods 42 disposed on the brush plate 41. A first crossbar 43 and a second crossbar 44 are provided on the connecting rods 42. A fixing member 45 is provided on the first crossbar 43. The second telescopic rod 1443 is connected to the first crossbar 43 via the fixing member 45. A cylinder control cabinet 145 is also provided on the fourth pool wall 14, and the cylinder control cabinet 145 is electrically connected to the cylinder 144. When the cylinder 144 extends and retracts, it can drive the DBP collection assembly 4 to reciprocate through the second telescopic rod 1443 and the first telescopic rod 1442.

[0026] In some embodiments, to ensure smooth movement of the DBP collection assembly 4, an identical cylinder 144 is provided on the third pool wall 13, opposite to the fourth pool wall 14. The difference lies in that the second telescopic rod 1443 on the cylinder 144 is connected via a fixing member 45 and a second crossbar 44. When the cylinder 144 on the third pool wall 13 extends or retracts, the second telescopic rod 1443 and the first telescopic rod 1442, connected to the fixing member 45, drive the DBP collection assembly 4 to reciprocate. It should be noted that when the cylinder 144 on the fourth pool wall 14 extends, the cylinder 144 on the third pool wall 13 retracts, and vice versa. The extension and retraction of the cylinder 144 are controlled by an electrically connected cylinder control cabinet 145.

[0027] Referring to Figure 4, the upper guide rail 112 and the lower guide rail 113 are arranged in parallel. The two connecting rods 42 are respectively provided with an upper sliding rod 421 and a lower sliding rod 422. The upper sliding rod 421 passes through the upper guide rail 112, and the lower sliding rod 422 passes through the lower guide rail 113. The upper sliding rod 421 and the lower sliding rod 422 can move linearly along the tracks limited by the upper guide rail 112 and the lower guide rail 113, respectively. In some embodiments, a sleeve 423 is fitted at the position where the upper sliding rod 421 passes through the upper guide rail 112, and a bearing is installed inside the sleeve 423. (Not shown in the figure) The sleeve 423 is housed in the track of the upper guide rail 112. Similarly, a sleeve 423 is fitted at the position where the sliding rod 422 passes through the lower guide rail 113. The sleeve 423 is housed in the track of the lower guide rail 113. When the DBP collection assembly 4 is pulled by the cylinder 144 to make reciprocating linear motion, the operation is more stable under the cooperation and restriction of the upper sliding rod 421 and the upper guide rail 112, and the sliding rod 422 and the lower guide rail 113. In this way, the DBP that has settled to the bottom of the pool is less likely to be stirred up, which would affect the collection effect.

[0028] refer to Figure 1 and Figure 5 As shown, the first pool wall 11 and the second pool wall 12 are respectively provided with horizontal support bars 121 near the bottom of the pool. The two support bars 121 are symmetrically arranged. The brush plate 41 on the DBP collection component 4 is hung on the support bar 121 through the brush heads 412 at both ends. The brush plate 41 is also provided with brush heads 412. The brush heads 412 are preferably made of silicone, which is resistant to acids, alkalis and oils. The support bar 121 is provided with stop blocks 1211 at both ends. The positions of the two stop blocks 1211 correspond to the positions that the brush plate 41 moves to when the cylinder 144 on the fourth pool wall 14 is extended to its maximum and the position that the cylinder 144 on the third pool wall 13 is extended to its maximum. The brush plate 41 is hung on the support bar 121 to avoid irregular shaking of the brush plate 41 when the cylinder 144 drives the DBP collection component 4 to reciprocate, which would cause the boundary layer between DBP and water to be damaged.

[0029] refer toFigure 2 As shown, the drain pipe 114 is arranged at a distance from the first pool wall 11 and the pool bottom, and the water layer can be discharged through the drain pipe 114. The DBP collecting and discharging device 100 for maleic anhydride sewage treatment is also provided with a DBP discharging pipeline, which comprises a first DBP discharging pipe 21 and a second DBP discharging pipe 31 arranged at the bottom of the first collecting tank 2 and the second collecting tank 3 respectively, a first valve 211 arranged on the first DBP discharging pipe 21, a second valve 311 arranged on the second DBP discharging pipe 31, the first DBP discharging pipe 21 and the second DBP discharging pipe 31 being communicated through a first three-way pipe 22, another outlet of the first three-way pipe 22 being connected with a second water outlet pipe 23, the second water outlet pipe 23 being provided with a second three-way pipe 24, an outlet of the second three-way pipe 24 being connected with a flushing pipeline 25, the flushing pipeline 25 being provided with a third valve 251, and an outlet of the fourth valve 26 being communicated with a small flow rate water pump (not shown in the figure). When a certain amount of DBP is collected in the first collecting tank 2 and the second collecting tank 3, the DBP discharging time point can be summarized according to the actual working condition. When it is necessary to discharge DBP, the first DBP discharging pipe 21, the second DBP discharging pipe 31 and the fourth valve 26 are opened, the small flow rate water pump is started, and the DBP collected in the first collecting tank 2 and the second collecting tank 3 is slowly discharged. The discharged liquid is observed, and when no DBP layer and no oil phase are observed in the discharged liquid sewage, the discharge is stopped, the fourth valve 26 is closed, the third valve 251 is opened, and clean water is flushed into the second valve 311, the second DBP discharging pipe 31, the first valve 211 and the first DBP discharging pipe 21 to prevent blockage and affect the next discharge.

[0030] When the DBP collecting and discharging device 100 for maleic anhydride sewage treatment provided by the utility model is operated, DBP water washing sewage is first filled in the sewage tank 1, and after standing for one day, the cylinder 144 is started to drive the DBP collecting assembly 4 to slowly do reciprocating motion. The operation frequency of the cylinder 144 is 1~2 times per minute of the sewage tank 1~the first collecting tank 2, and after 5~10 minutes of operation, the cylinder 144 is stopped, and after standing for about 6 hours, the upper layer of water is discharged through the fourth pool wall 14. After the discharge is completed, DBP water washing sewage is again filled in the sewage tank 1, and until a certain amount of DBP is collected in the first collecting tank 2 and the second collecting tank 3, the collected DBP is discharged through the DBP discharging pipeline.

[0031] Based on the above ideal embodiments according to the utility model, through the above description, relevant staff can make various changes and modifications without deviating from the scope of the utility model. The technical scope of the utility model is not limited to the content in the specification, and must be determined according to the scope of claims.

Claims

1. A maleic anhydride wastewater treatment device with trace DBP collection, characterized in that: It includes a sewage tank (1), a first collection tank (2) and a second collection tank (3) respectively arranged at both ends of the bottom of the sewage tank (1), as well as a DBP collection component (4) and a driving device. The depths of the first collection tank (2) and the second collection tank (3) are greater than the depth of the sewage tank (1). The sewage tank (1) includes a first pool wall (11), a second pool wall (12), a third pool wall (13), and a fourth pool wall (14). Fixing plates (111) are respectively provided at the four corners of the first pool wall (11) and the second pool wall (12). Two fixing plates (111) on the same pool wall form a group. An upper guide rail (112) and a lower guide rail (113) are respectively provided on each group of fixing plates (111). The upper guide rail (112) and the lower guide rail (113) are in a "return" shape.

2. The maleic anhydride waste water treatment device with collecting trace DBP according to claim 1, characterized in that: The DBP collection component (4) includes a brush plate (41) and two connecting rods (42) arranged on the brush plate (41). A first cross bar (43) and a second cross bar (44) are provided on the connecting rod (42).

3. The maleic anhydride waste water treatment device with trace DBP collection of claim 2, wherein: Fixing members (45) are respectively provided on the first cross bar (43) and the second cross bar (44).

4. The maleic anhydride waste water treatment device with collecting trace DBP according to claim 2, characterized in that: Upper sliding rods (421) and lower sliding rods (422) are also respectively provided on the two connecting rods (42). The upper sliding rod (421) passes through the upper guide rail (112), and the lower sliding rod (422) passes through the lower guide rail (113).

5. The maleic anhydride waste water treatment device with trace DBP collection of claim 4, wherein: A water inlet pipe (141) is provided on the fourth pool wall (14). The water inlet pipe (141) is fixed by a plurality of fixing brackets (1411) provided on the fourth pool wall (14).

6. The maleic anhydride waste water treatment device with trace DBP collection of claim 5, wherein: A cylinder mounting platform (142) is further provided near the middle of the upper end of the fourth pool wall (14). A cylinder fixing bracket (143) is provided on the cylinder mounting platform (142), and a cylinder (144) is fixed on the cylinder fixing bracket (143).

7. The maleic anhydride waste water treatment device with trace DBP collection of claim 6, wherein: The cylinder (144) includes a cylinder body (1441), a first telescopic rod (1442) and a second telescopic rod (1443). The second telescopic rod (1443) is connected to the first cross bar (43) through a fixing member (45).

8. The maleic anhydride waste water treatment device with trace DBP collection of claim 7, wherein: The upper guide rail (112) and the lower guide rail (113) are arranged in parallel. A sleeve (423) is sleeved at the position where the upper sliding rod (421) passes through the upper guide rail (112). A bearing is installed in the sleeve (423), and the sleeve (423) is accommodated in the track of the upper guide rail (112). Similarly, a sleeve (423) is sleeved at the position where the lower sliding rod (422) passes through the lower guide rail (113), and the sleeve (423) is accommodated in the track of the lower guide rail (113).

9. The maleic anhydride waste water treatment device with trace DBP collection of claim 8, wherein: The sewage treatment device is also provided with a DBP discharge pipeline, comprising a first DBP liquid outlet pipe (21) and a second DBP liquid outlet pipe (31) respectively arranged at the bottom of the first collecting tank (2) and the second collecting tank (3), a first valve (211) arranged on the first DBP liquid outlet pipe (21), a second valve (311) arranged on the second DBP liquid outlet pipe (31), the first DBP liquid outlet pipe (21) and the second DBP liquid outlet pipe (31) communicated through a first three-way pipe (22), another outlet of the first three-way pipe (22) connected with a second water outlet pipe (23), the second water outlet pipe (23) provided with a second three-way pipe (24), one outlet of the second three-way pipe (24) connected with a flushing pipeline (25), the flushing pipeline (25) provided with a third valve (251), the outlet of the second water outlet pipe (23) passing through the second three-way pipe (24) provided with a fourth valve (26), the outlet of the fourth valve (26) communicated with a small flow rate water pump.

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