Maleic anhydride wastewater treatment system

Abstract

The utility model relates to a maleic anhydride wastewater treatment system, which is used for treating wastewater generated in the maleic anhydride production and processing process and comprises an oil separation tank, an anaerobic tank, an aerobic tank, a settling and filtering device and a purification device, the settling and filtering device comprises a filtering box, a baffle is arranged in the filtering box, and the bottom of the baffle is communicated with a water outlet pipe; a valve is installed on the water outlet pipe, a filter screen is arranged in the filter box, a spiral conveying device is further arranged on the filter box, the spiral conveying device comprises a motor, a material conveying pipe and a spiral conveying roller arranged in the material conveying pipe, the material conveying pipe is obliquely arranged, and sediment enters the material conveying pipe from a slag inlet in the material conveying pipe along the oblique filter screen; the motor drives the spiral conveying roller to rotate, so that precipitates in the material conveying pipe are conveyed upwards, the precipitates in the material conveying pipe are discharged through the slag outlet pipe at the slag outlet, the precipitates are convenient to clean, and the cleaning efficiency is high.

Description

Technical Field

[0001] The utility model belongs to the technical field of maleic anhydride production, in particular to a maleic anhydride wastewater treatment system. Background Art

[0002] Maleic anhydride, the full name of which is maleic anhydride, is a colorless crystalline powder with a strong pungent odor. Maleic anhydride is obtained by catalytic oxidation of benzene or oxidation of butene or butane with air. It is soluble in ethanol, ether and acetone, and difficult to dissolve in petroleum ether and carbon tetrachloride. It reacts with hot water to form maleic acid. It has a wide range of uses and can be used in diene synthesis, preparation of drugs, pesticides, dye intermediates, preparation of organic acids such as polyester resins, alkyd resins, maleic acid, etc. It can also be used as a fat and oil preservative, etc.

[0003] Wastewater is generated during the production of maleic anhydride, and the wastewater can be discharged only after being treated. The process of harmless treatment of wastewater includes physical treatment of wastewater, that is, adding appropriate precipitants to the wastewater to convert suspended matter and soluble matter in the wastewater into precipitates, and then removing the precipitates through filtering and other steps. Since the precipitates are deposited on the filter screen, the precipitates on the filter screen need to be manually cleaned out after working for a period of time, and the cleaning efficiency is low. Therefore, there are still shortcomings and deficiencies in the existing technology. Utility Model Content

[0004] The utility model aims to provide a maleic anhydride wastewater treatment system to solve the above problems.

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

[0006] Provided is a maleic anhydride wastewater treatment system, comprising a grease trap, an anaerobic tank, an aerobic tank, a sedimentation filter device and a purification device, wherein the grease trap is connected to the anaerobic tank, the anaerobic tank is connected to the aerobic tank, the aerobic tank is connected to the sedimentation filter device, the sedimentation filter device is connected to the purification device, the sedimentation filter device comprises a filter box, a baffle is arranged in the filter box, a water outlet pipe is connected to the bottom of the baffle, a valve is installed on the water outlet pipe, a filter screen is arranged in the filter box, the filter screen is inclined, a screw conveying device is also arranged on the filter box, and the screw conveying device comprises A motor, a feed pipe and a spiral conveying roller arranged in the feed pipe, the feed pipe is inclined, both ends of the feed pipe are closed, the feed pipe is fixedly arranged on the filter box, the lower end of the feed pipe is located in the filter box, and the higher end of the feed pipe is located outside the filter box, the motor is installed on the feed pipe, the spiral conveying roller is arranged along the axial direction of the feed pipe, the output shaft of the motor is fixedly connected to the spiral conveying roller, the part of the feed pipe located in the filter box is provided with a slag inlet, and the part of the feed pipe located outside the filter box is provided with a slag outlet.

[0007] Furthermore, the purification device includes a purification box, a box cover is arranged on the top of the purification box, the box cover is detachably arranged on the top of the purification box, and an ultraviolet lamp is installed on the box cover.

[0008] Furthermore, a plurality of baffles are provided in the purification box, and the baffles are fixedly connected to the inner wall of the purification box.

[0009] Furthermore, a plurality of the baffles are staggeredly arranged in the purification box.

[0010] Furthermore, a connecting frame is provided between the feed conveying pipe and the filter box.

[0011] Furthermore, a first delivery pipe is provided between the grease trap and the anaerobic tank.

[0012] Furthermore, a second delivery pipe is provided between the anaerobic tank and the aerobic tank.

[0013] Furthermore, a third delivery pipe is provided between the aerobic tank and the sedimentation and filtration device.

[0014] Furthermore, a fourth delivery pipe is provided between the sedimentation and filtering device and the purification device.

[0015] By adopting the above technical solution, the beneficial effects of the utility model are:

[0016] In the maleic anhydride wastewater treatment system provided by the utility model, a screw conveying device is arranged on the filter box, and the screw conveying device comprises a motor, a feed pipe and a screw conveying roller arranged in the feed pipe. Under the action of a precipitant, suspended matter and soluble matter in the wastewater located above the baffle are converted into precipitates, and then the valve is opened, and the wastewater falls to the filter screen through the outlet pipe. Under the filtering action of the filter screen, the precipitate enters the feed pipe from the slag inlet on the feed pipe along the inclined filter screen, and the motor drives the screw conveying roller to rotate, so that the precipitate in the feed pipe is transported upward, and the precipitate in the feed pipe is discharged through the slag outlet pipe at the slag outlet, which is convenient for cleaning the precipitate and has a high cleaning efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the maleic anhydride wastewater treatment system in the utility model.

[0018] Figure 2 for Figure 1 The cross-sectional schematic diagram of the sedimentation and filtration device in the maleic anhydride wastewater treatment system is shown.

[0019] Figure 3 for Figure 1 The schematic cross-sectional view of the purification device in the maleic anhydride wastewater treatment system is shown.

[0020] Figure numerals: 10, grease trap; 11, first conveying pipe; 20, anaerobic tank; 21, second conveying pipe; 30, aerobic tank; 31, third conveying pipe; 40, sedimentation and filtration device; 41, filter box; 42, water inlet bucket; 43, baffle; 44, water outlet pipe; 441, valve; 45, filter screen; 46, screw conveying device; 461, motor; 462, feed pipe; 4621, slag inlet; 4622, slag outlet; 4623, slag outlet pipe; 463, screw conveying roller; 47, connecting frame; 48, fourth conveying pipe; 50, purification device; 51, purification box; 52, box cover; 53, ultraviolet lamp; 54, baffle. DETAILED DESCRIPTION

[0021] In order to make the technical problems, technical solutions and beneficial effects to be solved by the utility model clearer, the utility model is now described in detail in conjunction with the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basics of the utility model in a schematic manner, so it only shows the structure related to the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] like Figure 1As shown, the utility model provides a maleic anhydride wastewater treatment system, which is used to treat the wastewater generated in the production and processing of maleic anhydride, can avoid causing environmental pollution and meet environmental protection requirements.

[0023] like Figure 1 As shown, the maleic anhydride wastewater treatment system provided by the utility model includes a grease trap 10, an anaerobic tank 20, an aerobic tank 30, a sedimentation filter device 40 and a purification device 50, the grease trap 10 is connected to the anaerobic tank 20, the anaerobic tank 20 is connected to the aerobic tank 30, the aerobic tank 30 is connected to the sedimentation filter device 40, and the sedimentation filter device 40 is connected to the purification device 50.

[0024] like Figure 1 As shown, the wastewater generated during the production and processing of maleic anhydride first enters the grease trap 10 for treatment. In the grease trap 10, the density difference between oil droplets and water is used to produce a flotation effect to remove the floatable oil substances in the above-mentioned oil-containing wastewater, thereby removing the oil substances.

[0025] like Figure 1 As shown, a first delivery pipe 11 is provided between the grease trap 10 and the anaerobic tank 20. The first delivery pipe 11 connects the grease trap 10 with the anaerobic tank 20. The wastewater after the oil substances are removed in the grease trap 10 is transported into the anaerobic tank 20 through the first delivery pipe 11 for anaerobic treatment. The anaerobic treatment utilizes the action of anaerobic bacteria in the anaerobic tank 20 to degrade complex organic materials in the wastewater through anaerobic decomposition.

[0026] like Figure 1 As shown, a second delivery pipe 21 is provided between the anaerobic tank 20 and the aerobic tank 30, and the second delivery pipe 21 connects the anaerobic tank 20 with the aerobic tank 30, and the wastewater after anaerobically treated in the anaerobic tank 20 is transported into the aerobic tank 30 through the second delivery pipe 21 for aerobic treatment. It can be understood that activated sludge is provided in the aerobic tank 30, and the function of the aerobic tank 30 is to allow the activated sludge to perform aerobic respiration, further decompose the organic matter in the wastewater into inorganic matter, and play the role of removing pollutants. Only by controlling the oxygen content and other required conditions of the microorganisms can the microorganisms perform aerobic respiration to the maximum extent.

[0027] like Figure 1 As shown, a third delivery pipe 31 is provided between the aerobic pool 30 and the sedimentation filter device 40, and the third delivery pipe 31 connects the aerobic pool 30 with the sedimentation filter device 40. The wastewater after aerobic treatment in the aerobic pool 30 is transported into the sedimentation filter device 40 through the third delivery pipe 31 for sedimentation filtration treatment.

[0028] like Figure 2 As shown, the sedimentation filtration device 40 includes a filter box 41, and a water inlet hopper 42 connected to the inside of the filter box 41 is provided on the top of the filter box 41. The precipitant can be added into the filter box 41 through the water inlet hopper 42 to convert the suspended matter and soluble substances in the wastewater into sediment. A baffle 43 is provided in the filter box 41, and the baffle 43 is roughly conical. The baffle 43 is fixedly connected to the inner wall of the filter box 41, and the bottom of the baffle is connected to the outlet pipe 44, and a valve 441 is installed on the outlet pipe 44. A filter screen 45 is provided in the filter box 41, and the filter screen 45 is inclined. A screw conveying device 46 is also provided on the filter box 41, and the screw conveying device 46 is used to discharge the sediment and the like filtered out of the filter box 41 through the filter screen 45 out of the filter box 41.

[0029] like Figure 2 As shown, the spiral conveying device 46 includes a motor 461, a feed pipe 462 and a spiral conveying roller 463 arranged in the feed pipe 462, the feed pipe 462 is inclined, both ends of the feed pipe 462 are closed ends, the feed pipe 462 is fixedly set on the sedimentation filtering device 40, the lower end of the feed pipe 462 is located in the filter box 41, and the higher end of the feed pipe 462 is located outside the filter box 41, the motor 461 is installed on the feed pipe 462, the spiral conveying roller 463 is set along the axial direction of the feed pipe 462, and the output shaft of the motor 461 is fixedly connected to the spiral conveying roller 463.

[0030] like Figure 2 As shown, the portion of the feed pipe 462 located in the filter box 41 is provided with a slag inlet 4621, which is opened at the top of the side of the feed pipe 462. The slag inlet 4621 is used to input the filtered sediment into the feed pipe 462, and the lower end of the filter screen 45 is arranged close to the slag inlet 4621. The portion of the feed pipe 462 located outside the filter box 41 is provided with a slag outlet 4622, which is opened at the bottom of the side of the feed pipe 462. A slag outlet pipe 4623 is connected to the slag outlet 4622, and the slag outlet pipe 4623 is connected to the inside of the feed pipe 462 through the slag outlet 4622, and the sediment filtered out of the filter box 41 can be discharged through the slag outlet pipe 4623.

[0031] like Figure 2As shown, a connecting frame 47 is provided between the feed pipe 462 and the filter box 41. The connecting frame 47 is "L"-shaped. One end of the connecting frame 47 is fixedly connected to the side wall of the filter box 41, and the other end of the connecting frame 47 is fixedly connected to the feed pipe 462. By providing the connecting frame 47, the connection strength can be improved.

[0032] like Figure 1 As shown, a fourth delivery pipe 48 is provided on the side of the filter box 41, and the fourth delivery pipe 48 is connected with the interior of the filter box 41. The fourth delivery pipe 48 connects the filter box 41 with the purification device 50. The wastewater after sedimentation filtration in the filter box 41 is transported into the purification device 50 through the fourth delivery pipe 48 for final purification treatment.

[0033] like Figure 3 As shown, the purification device 50 includes a purification box 51, and a box cover 52 is arranged on the top of the purification box 51. The box cover 52 is detachably arranged on the top of the purification box 51. Specifically, the box cover 52 is connected to the top of the purification box 51 by bolts. An ultraviolet lamp 53 is installed on the box cover 52, and the ultraviolet light emitted by the ultraviolet lamp 53 can sterilize and disinfect the wastewater transported into the purification box 51 through the fourth transport pipe 48.

[0034] In some embodiments, such as Figure 3 As shown, a plurality of baffles 54 are also provided in the purification box 51. The baffles 54 are fixedly connected to the inner wall of the purification box 51. The plurality of baffles 54 are staggered in the purification box 51 so that the ultraviolet rays emitted by the ultraviolet lamp 53 are in full contact with the water, thereby ensuring the disinfection and sterilization effect.

[0035] In the maleic anhydride wastewater treatment system provided by the utility model, the wastewater is sequentially subjected to oil removal in the oil separator 10, anaerobically decomposed under the action of anaerobic bacteria in the anaerobic tank 20, and aerobic treatment is performed in the aerobic tank 30, and then the wastewater is transported into the filter box 41 through the third transport pipe 31, and the suspended matter and soluble matter in the wastewater located above the baffle 43 are converted into sediments under the action of the precipitant, and then the valve 441 is opened, and the wastewater falls toward the filter screen 45 through the outlet pipe 44, and under the filtering action of the filter screen 45, the sediment enters the feed pipe 462 from the slag inlet 4621 on the feed pipe 462 along the inclined filter screen 45, and the motor 461 drives the spiral transport roller 463 to rotate, so that the sediment in the feed pipe 462 is transported upward, and then the sediment in the feed pipe 462 is discharged through the slag discharge pipe 4623 at the slag discharge port 4622, which is convenient for cleaning the sediment, easy to use, and high in cleaning efficiency.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] The above is based on the ideal embodiment of the utility model. Through the above description, relevant staff can make various changes and modifications without departing from the scope of the utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A maleic anhydride wastewater treatment system, characterized in that: The invention comprises an oil separator, an anaerobic tank, an aerobic tank, a sedimentation filter device and a purification device, wherein the oil separator is connected to the anaerobic tank, the anaerobic tank is connected to the aerobic tank, the aerobic tank is connected to the sedimentation filter device, the sedimentation filter device is connected to the purification device, the sedimentation filter device comprises a filter box, a baffle is arranged in the filter box, a water outlet pipe is connected to the bottom of the baffle, a valve is installed on the water outlet pipe, a filter screen is arranged in the filter box, the filter screen is inclined, a screw conveying device is also arranged on the filter box, and the screw conveying device comprises a motor, a feed pipe and a and a spiral conveying roller arranged in the conveying pipe, the conveying pipe is arranged obliquely, both ends of the conveying pipe are closed ends, the conveying pipe is fixedly arranged on the filter box, the lower end of the conveying pipe is located in the filter box, and the higher end of the conveying pipe is located outside the filter box, the motor is installed on the conveying pipe, the spiral conveying roller is arranged along the axial direction of the conveying pipe, the output shaft of the motor is fixedly connected to the spiral conveying roller, the part of the conveying pipe located in the filter box is provided with a slag inlet, and the part of the conveying pipe located outside the filter box is provided with a slag outlet.

2. A maleic anhydride wastewater treatment system according to claim 1, characterized in that: The purification device comprises a purification box, a box cover is arranged on the top of the purification box, the box cover is detachably arranged on the top of the purification box, and an ultraviolet lamp is installed on the box cover.

3. A maleic anhydride wastewater treatment system according to claim 2, characterized in that: A plurality of baffles are also arranged in the purification box, and the baffles are fixedly connected to the inner wall of the purification box.

4. A maleic anhydride wastewater treatment system according to claim 3, characterized in that: A plurality of baffles are arranged alternately in the purification box.

5. A maleic anhydride wastewater treatment system according to claim 1, characterized in that: A connecting frame is arranged between the material conveying pipe and the filter box.

6. A maleic anhydride wastewater treatment system according to claim 1, characterized in that: A first conveying pipe is arranged between the grease trap and the anaerobic tank.

7. A maleic anhydride wastewater treatment system according to claim 1, characterized in that: A second conveying pipe is arranged between the anaerobic tank and the aerobic tank.

8. A maleic anhydride wastewater treatment system according to claim 1, characterized in that: A third delivery pipe is arranged between the aerobic tank and the sedimentation and filtering device.

9. A maleic anhydride wastewater treatment system according to claim 1, characterized in that: A fourth delivery pipe is provided between the sedimentation filtering device and the purification device.

Images