Waste water recovery device for cyclohexanone production

Abstract

The invention discloses a waste water recovery device for cyclohexanone production, relates to the technical field of waste water recovery, and solves the problem that a filtering membrane is difficult to maintain in a cyclohexanone production waste water recovery pretreatment link in the prior art. Comprising a wastewater treatment tank and a cover plate fixedly connected to the wastewater treatment tank, and a filtering inner cavity is formed in the wastewater treatment tank; the device further comprises a wastewater purification mechanism, the wastewater purification mechanism comprises a supporting frame plate and a mounting frame plate which are fixedly connected in the filtering inner cavity, an upper liquid guide channel movably inserted into the mounting frame plate, a lower liquid guide channel movably inserted into the supporting frame plate, bases fixedly mounted on the two sides of the surface of the supporting frame plate, and a film rolling cylinder and a film releasing cylinder which are rotationally arranged in ports of the two bases respectively; the filter membrane is wound on the membrane winding drum and the membrane unwinding drum; according to the scheme design, tedious dismounting and replacing procedures are not needed, operation and use are more convenient, the cleaning burden of maintenance personnel is relieved, and the overall filtering treatment efficiency is remarkably improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of wastewater recovery, and particularly relates to a wastewater recovery device for cyclohexanone production. BACKGROUND

[0002] Cyclohexanone wastewater is generated in the cyclohexanone production process, and has the characteristics of high-concentration organic matter, alkaline substances and toxic components. There are mainly three ways of generating the wastewater: first, wastewater containing organic matter is generated in the pretreatment stage of raw materials such as phenol and cyclohexane; second, wastewater is generated in the production of intermediate products such as cyclohexanone, cyclohexanol and cyclohexyl hydroperoxide; and third, high-chemical oxygen demand (COD) and high-pH saponification waste alkali liquid is generated in the neutralization process of organic acids in the oxidation liquid.

[0003] At present, the combination recovery treatment mode of "pretreatment + physical treatment + biological treatment + advanced treatment" is generally used for cyclohexanone wastewater. However, in the pretreatment link, the traditional technical scheme has obvious deficiencies. For example, although the fixed filter membrane can improve the filtering precision, the maintenance is extremely inconvenient. The fixed filter membrane is usually permanently installed in the filter cavity, and when it needs to be replaced, the related components need to be stopped and disassembled, and the operation process is complex and time-consuming. This not only directly reduces the production efficiency, but also affects the stability of the whole system due to frequent start-stop operation.

[0004] In summary, the existing technology has the problem of difficult maintenance of the filter membrane in the pretreatment link of the cyclohexanone production wastewater recovery. SUMMARY

[0005] The application provides a wastewater recovery device for cyclohexanone production, which can solve the problem of difficult maintenance of the filter membrane in the pretreatment link of the cyclohexanone production wastewater recovery in the prior art.

[0006] To achieve the above-mentioned purpose, according to the first aspect of the embodiment of the application, a wastewater recovery device for cyclohexanone production is provided, which comprises a wastewater treatment tank and a cover plate fixedly connected to the wastewater treatment tank, and a filter inner cavity is arranged in the wastewater treatment tank; Further comprising: A wastewater purification mechanism is arranged in the filter inner cavity, which comprises a support frame plate and a mounting frame plate fixedly connected in the filter inner cavity, an upper liquid guide channel movably inserted into the mounting frame plate, a lower liquid guide channel movably inserted into the support frame plate, a base fixedly installed on the surface of the support frame plate on both sides, a film winding drum and a film unwinding drum rotatably arranged in the ports of the two bases, respectively, and a filter membrane wound on the film winding drum and the film unwinding drum, and a main shaft fixedly installed on the side surface of each base and a DC synchronous motor connected to the side port of the film winding drum and the film unwinding drum. The pressure cylinder is fixedly connected to the mounting rack plate and located on both sides of the upper liquid guide channel, and a lifting plate is fixedly sleeved outside the upper liquid guide channel, the rod body of each pressure cylinder is fixedly connected to the surface of the lifting plate, and the lifting plate and the upper liquid guide channel are driven to lift up and down; A pressure plate is fixedly sleeved outside the bottom surface of the upper liquid guide channel, and a circle of elastic rubber pressing strips are fixedly connected to the bottom surface of the pressure plate.

[0007] Further improvement lies in that a pretreatment inner cavity is further arranged in the wastewater treatment tank, the pretreatment inner cavity is located above the filtering inner cavity, an electric valve is fixedly connected to the bottom surface liquid outlet of the pretreatment inner cavity, and the top end of the upper liquid guide channel is movably sleeved outside the bottom end port of the electric valve.

[0008] Further improvement lies in that the wastewater purification mechanism further comprises a spring buffering device, the spring buffering device comprises a pressure bearing seat fixedly installed outside the top end port of the lower liquid guide channel and buffering guide columns fixedly connected to the bottom surface four corners of the pressure bearing seat, compression grooves are vertically formed at the surface four corners of the support rack plate, buffering compression springs are fixedly installed in each compression groove, and the buffering guide columns at the bottom surface four corners of the pressure bearing seat are movably inserted into the compression grooves and fixedly connected to the top ends of the buffering compression springs in the grooves.

[0009] Further improvement lies in that a clamping groove is formed in the surface of the pressure bearing seat, the clamping groove is matched with the elastic rubber pressing strips on the bottom surface of the pressure plate, and the clamping groove is used for clamping sealing.

[0010] Further improvement lies in that a plurality of liquid guide plates are fixedly connected in sequence in the upper liquid guide channel, and the liquid guide plates are arranged in a ladder type.

[0011] Further improvement lies in that a wastewater neutralization assembly is further arranged, which is used for injecting reagents into the wastewater treatment tank. The wastewater neutralization assembly comprises a reagent storage tank fixedly installed on the tank cover, a liquid pumping pump fixedly installed in the reagent storage tank and an annular through pipe fixedly connected in the pretreatment inner cavity, the output pipeline of the liquid pumping pump is connected with the annular through pipe, a plurality of branch pipes are fixedly and equally connected in the annular through pipe, and a plurality of reagent outlets are formed in the bottom surface of the annular through pipe and each branch pipe in sequence and at equal intervals.

[0012] Further improvement lies in that a mixing device is further arranged, which is used for stirring and mixing the wastewater in the wastewater treatment tank. The mixing device comprises a mixing rod vertically rotatably arranged in the filtering inner cavity, a plurality of mixing blades fixedly arranged on the mixing rod and a speed reducer fixedly installed on the tank cover and connected with the mixing rod.

[0013] Compared with the prior art, the present application has the following beneficial effects: (1) The scheme design of the present application drives the lifting plate and the upper liquid guide channel to descend by starting a pair of pressure cylinders. When the upper pressing plate is pressed down, the filter membrane is pressed into the clamping groove under the action of the elastic rubber pressing strip. This design provides a clear positioning reference for the filter membrane, effectively prevents lateral leakage of wastewater from the contact surface between the filter membrane and the pressure bearing seat, and tightens and straightens the filter membrane to avoid wrinkles and ensure the filtering effect. Then, the electric valve is opened to discharge the neutralized wastewater. The wastewater first passes through the multiple stepped liquid guide plates to slow down the impact force and effectively avoid direct impact damage to the filter membrane. Moreover, when the pressing plate is pressed down, the buffer guide columns at the four corners of the bottom surface of the pressure bearing seat compress the buffer compression springs in the four compression grooves, which can prevent the filter membrane from being damaged by excessive pressure while ensuring the tight pressing effect.

[0014] (2) The scheme design of the present application synchronously starts a pair of direct current synchronous motors when the filter membrane is used for a period of time. One of the motors drives the membrane discharge cylinder to discharge clean filter membranes, and the other motor drives the membrane winding cylinder to wind up the used filter membranes for storage. This design eliminates the need for complicated disassembly and replacement procedures, making operation more convenient. It not only reduces the cleaning burden of maintenance personnel, but also significantly improves the overall filtering efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the overall structure schematic diagram of the present application; Figure 2 is the cross-sectional structure schematic diagram of the entire wastewater treatment tank of the present application; Figure 3 is the local structure schematic diagram of the wastewater purification mechanism of the present application; Figure 4 is the partial structure schematic diagram of the lower liquid guide channel and spring buffer device of the present application; Figure 5 is the top view schematic diagram of the elastic rubber pressing strip pressing the filter membrane; Figure 6 is the upper structure schematic diagram of the upper liquid guide channel of the present application; Figure 7 is the top view schematic diagram of the annular through pipe and branch pipe of the present application.

[0016] Markings in the figure: 1, wastewater treatment tank; 11, maintenance door; 12, tank cover; 121, cover plate; 101, pretreatment inner cavity; 102, filtration inner cavity; 103, electric valve; 2, mixing device; 21, speed reducer; 22, mixing blade; 23, mixing rod; 3, wastewater purification mechanism; 31, support frame plate; 32, mounting frame plate; 33, upper liquid guide channel; 331, pressing plate; 332, elastic rubber pressing strip; 333, liquid guide plate; 34, lower liquid guide channel; 35, pressure cylinder; 36, lifting plate; 37, base; 371, film winding drum; 372, film unwinding drum; 373, filter membrane; 374, DC synchronous motor; 38, spring buffer device; 381, pressure bearing seat; 382, buffer guide column; 383, compression groove; 384, buffer compression spring; 385, clamping groove; 4, wastewater neutralization assembly; 41, agent storage tank; 42, liquid pumping pump; 43, annular through pipe; 44, branch pipe; 45, agent outlet. DETAILED DESCRIPTION

[0017] The specific embodiments of the present application are described in detail below, but it should be understood that the scope of protection of the present application is not limited by the specific embodiments.

[0018] As shown in Figures 1 to 6 A wastewater recovery device for cyclohexanone production includes: The wastewater treatment tank 1 is fixedly connected with the tank cover 12 fixedly connected to the wastewater treatment tank 1. The wastewater treatment tank 1 is provided with a pretreatment inner cavity 101 and a filter inner cavity 102. The pretreatment inner cavity 101 is located above the filter inner cavity 102. An electric valve 103 is fixedly connected to the liquid outlet on the bottom surface of the pretreatment inner cavity 101. A cover plate 121 is arranged on one side of the surface of the tank cover 12 corresponding to the position of the pretreatment inner cavity 101. The cover plate 121 is used to observe the wastewater treatment in the pretreatment inner cavity 101. The bottom surface of the wastewater treatment tank 1 is provided with a liquid outlet pipe for guiding the pretreated wastewater out. The wastewater purification mechanism 3 includes a support frame plate 31 and a mounting frame plate 32 fixedly connected in the filter inner cavity 102, an upper liquid guide channel 33 movably inserted into the mounting frame plate 32, a lower liquid guide channel 34 movably inserted into the support frame plate 31, a base 37 fixedly installed on both sides of the surface of the support frame plate 31, a film winding drum 371 and a film unwinding drum 372 rotatably arranged in the ports of the two bases 37, a filter membrane 373 wound on the film winding drum 371 and the film unwinding drum 372, a main shaft fixedly installed on the side surface of each base 37, and a DC synchronous motor 374 connected to the side port of the film winding drum 371 and the film unwinding drum 372. When the filter membrane 373 is used for a period of time, a pair of DC synchronous motors 374 are synchronously started. One drives the film unwinding drum 372 to unwind the clean filter membrane 373, and the other drives the film winding drum 371 to wind up the used filter membrane 373 for storage. The pressure cylinder 35 is fixedly connected to the installation rack plate 32 on both sides of the upper liquid guide channel 33, and the outer portion of the upper liquid guide channel 33 is fixedly sleeved with a lifting plate 36, and the rod body of each pressure cylinder 35 is fixedly connected to the surface of the lifting plate 36, for driving the lifting plate 36 and the upper liquid guide channel 33 to ascend and descend. The outer portion of the bottom end of the upper liquid guide channel 33 is fixedly sleeved with a pressing plate 331, and the bottom surface of the pressing plate 331 is fixedly connected with a circle of elastic rubber pressing strips 332, and the top end of the upper liquid guide channel 33 is movably sleeved outside the bottom end of the electric valve 103. The wastewater purification mechanism 3 further comprises a spring buffering device 38, which comprises a pressure bearing seat 381 fixedly installed outside the top end of the lower liquid guide channel 34, and a buffering guide column 382 fixedly connected to the bottom surface of the pressure bearing seat 381 at four corners, and a compression groove 383 is vertically formed at the surface of the support rack plate 31 at four corners, and a buffering compression spring 384 is fixedly installed in each compression groove 383, and the buffering guide column 382 at the bottom surface of the pressure bearing seat 381 is movably inserted into the compression groove 383, and the top end of the buffering compression spring 384 in the groove is fixedly connected. By starting a pair of pressure cylinders 35, the lifting plate 36 and the upper liquid guide channel 33 are driven to descend. When the pressing plate 331 on the upper liquid guide channel 33 is pressed down, the filter membrane 373 is pressed into the clamping groove 385 under the action of the elastic rubber pressing strip 332. This design provides a clear positioning reference for the filter membrane 373, effectively prevents wastewater from leaking laterally from the contact surface between the filter membrane 373 and the pressure bearing seat 381, and on the other hand, the filter membrane 373 is pressed and straightened to avoid wrinkles, ensuring the filtering effect.

[0019] In this embodiment, in order to realize clamping sealing, a clamping groove 385 is formed on the surface of the pressure bearing seat 381, and the clamping groove 385 cooperates with the elastic rubber pressing strip 332 on the bottom surface of the pressing plate 331.

[0020] In this embodiment, in order to slow down the impact force of wastewater, a plurality of liquid guide plates 333 are fixedly connected in the upper liquid guide channel 33 in sequence, and the liquid guide plates 333 are arranged in a stepped manner to avoid damage to the filter membrane 373 caused by direct impact of wastewater on the filter membrane 373.

[0021] In this embodiment, in order to facilitate maintenance of the wastewater purification mechanism 3, an access hole is provided on the side of the wastewater treatment tank 1 at a position corresponding to the filter inner cavity, and an access door 11 is fixedly connected in the access hole by bolts.

[0022] As shown in Figure 2 and Figure 7 In this embodiment, another implementation scheme is further provided, which is specifically as follows: The wastewater neutralization assembly 4 is used for injecting a medicament into the wastewater treatment tank 1. The wastewater neutralization assembly 4 comprises a reagent storage tank 41 fixedly installed on the tank cover 12, a liquid pumping pump 42 fixedly installed in the reagent storage tank 41, and an annular pipe 43 fixedly connected in the pretreatment inner cavity 101, the output pipeline of the liquid pumping pump 42 is connected with the annular pipe 43, a plurality of branch pipes 44 are fixedly and equidistantly connected in the annular pipe 43, a plurality of reagent outlets 45 are equidistantly and sequentially arranged on the bottom surface of the annular pipe 43 and each branch pipe 44, a viewing window is arranged on the reagent storage tank 41, and a scale is arranged in the viewing window; the reagent is pumped out from the reagent storage tank 41, introduced into the annular pipe 43 and the branch pipes 44, and then injected into the pretreatment inner cavity 101 through the reagent outlets 45, so as to neutralize the pH of the wastewater; and the appropriate pH value can also effectively avoid corrosion of the waste liquid to the treatment equipment, thereby prolonging the service life of the equipment. More specifically, the application further comprises a mixing device 2 for stirring and mixing the wastewater in the wastewater treatment tank 1. The mixing device 2 comprises a mixing rod 23 vertically arranged in the filtering inner cavity 102, a plurality of mixing blades 22 fixedly arranged on the mixing rod 23, and a speed reducer 21 fixedly installed on the tank cover 12 and connected with the mixing rod 23; the speed reducer 21 is started to drive the mixing rod 23 and the mixing blades 22 to rotate, so that the reagent and the wastewater are fully mixed to adjust the pH value of the cyclohexanone wastewater. The design is helpful for the growth and metabolism of microorganisms in the subsequent biochemical treatment or chemical treatment process, and is also beneficial to the smooth development of the treatment steps such as catalytic reaction and coagulation sedimentation, thereby significantly improving the waste liquid treatment efficiency.

[0023] It should be noted that the actual size of each component in the application file is selected and installed according to the actual demand on site. In addition, it should be noted that the application file only improves the difficulty in maintaining the filter membrane in the pretreatment step of the cyclohexanone production wastewater recovery, and does not involve other improvements.

[0024] In order to facilitate the understanding of the scheme embodiment by the person skilled in the art, the working principle of the scheme will be briefly described in combination with a specific application scenario: When the scheme of the application is actually used on site, first, the worker opens the cover plate 121 to pour the waste liquid into the pretreatment inner cavity 101.

[0025] Firstly, the staff opens the cover 121, and injects the quantitative waste liquid into the pre-treatment inner cavity 101. Then, the on-site staff controls the medicine extrusion amount by observing the scale in the observation window of the medicine storage tank 41. After that, the liquid pumping pump 42 is started to pump the medicine from the medicine storage tank 41 into the annular pipe 43 and the branch pipe 44, and then into the pre-treatment inner cavity 101 through the medicine outlet 45. At the same time, the speed reducer 21 is started to drive the mixing rod 23 and the mixing blade 22 to rotate, so that the medicine and the waste water are fully mixed to adjust the pH value of the cyclohexanone waste water. The design is helpful for the growth and metabolism of microorganisms in the subsequent biochemical treatment or chemical treatment process, and is also helpful for the smooth development of the catalytic reaction and the coagulation and sedimentation treatment steps, thereby significantly improving the waste liquid treatment efficiency. In addition, the appropriate pH value condition can effectively avoid the corrosion of the waste liquid to the treatment equipment, and prolong the service life of the equipment.

[0026] After the waste water neutralization treatment is completed, the pair of pressure cylinders 35 is started to drive the lifting plate 36 and the upper liquid guide channel 33 to descend. When the upper pressing plate 331 is pressed down, the filter membrane 373 is pressed into the clamping groove 385 under the action of the elastic rubber pressing strip 332. This design provides a clear positioning reference for the filter membrane 373, effectively prevents the waste water from leaking laterally from the contact surface between the filter membrane 373 and the pressure bearing seat 381, and also tightens and straightens the filter membrane 373 to avoid wrinkles and ensure the filtering effect. After that, the electric valve 103 is opened to discharge the neutralized waste water. The waste water first passes through the multiple ladder-shaped liquid guide plates 333 to slow down the falling impact force, effectively avoiding direct impact damage to the filter membrane 373. Moreover, when the pressing plate 331 is pressed down, the buffer guide columns 382 at the four corners of the bottom surface of the pressure bearing seat 381 are compressed in the four compression grooves 383 to compress the buffer compression springs 384, thereby preventing the filter membrane 373 from being damaged by excessive pressure when being pressed down.

[0027] After the waste water impact force is slowed down, the waste water falls onto the filter membrane 373, and the impurities are removed by gravity to reduce the turbidity of the waste liquid and achieve the pre-treatment of the waste water. When the filter membrane 373 is used for a period of time, a pair of direct-current synchronous motors 374 are simultaneously started. One of the direct-current synchronous motors 374 drives the clean filter membrane 373 to be discharged from the membrane releasing cylinder 372, and the other one drives the used filter membrane 373 to be wound up by the membrane winding cylinder 371 for storage. This design does not need complicated disassembly and replacement procedures, and is more convenient to operate and use, which not only reduces the cleaning burden of the maintenance personnel, but also significantly improves the overall filtering treatment efficiency.

[0028] The above disclosure is only a few specific embodiments of the present application, but the embodiments of the present application are not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the protection scope of the present application.

Claims

1. A wastewater recovery device for cyclohexanone production, characterized in that, The utility model provides waste water treatment jar (1) and the tank cover (12) of fixed connection in waste water treatment jar (1), be provided with filter inner chamber (102) in waste water treatment jar (1); Further comprising: Waste water purification mechanism (3), waste water purification mechanism (3) including fixedly connected in filter inner chamber (102) support frame board (31) and mounting frame board (32), the upper liquid guide channel (33) of active intercalation in mounting frame board (32), the lower liquid guide channel (34) of active intercalation in support frame board (31), the base (37) of fixed installation in support frame board (31) surface both sides, the film winding drum (371) and the film unwinding drum (372) of rotation setting in two base (37) port respectively, the filter membrane (373) of winding in film winding drum (371) and film unwinding drum (372), each base (37) side fixedly installed with main shaft and film winding drum (371) and film unwinding drum (372) side port connection's DC synchronous motor (374); The mounting frame board (32) is fixedly connected with a pressure cylinder (35) on both sides of the upper liquid guide channel (33), and the outer surface of the upper liquid guide channel (33) is fixedly sleeved with a lifting plate (36). The rod body of each pressure cylinder (35) is fixedly connected to the surface of the lifting plate (36), which is used to drive the lifting plate (36) and the upper liquid guide channel (33) to rise and fall. The bottom surface of the upper liquid guide channel (33) is fixedly sleeved with a pressing plate (331), and the bottom surface of the pressing plate (331) is fixedly connected with a circle of elastic rubber pressing strips (332).

2. The wastewater recovery device for cyclohexanone production according to claim 1, characterized by The waste water treatment jar (1) is further provided with a pretreatment inner chamber (101), which is located above the filter inner chamber (102). An electric valve (103) is fixedly connected to the liquid outlet on the bottom surface of the pretreatment inner chamber (101). The top end of the upper liquid guide channel (33) is movably sleeved outside the bottom end port of the electric valve (103).

3. The wastewater recovery device for cyclohexanone production according to claim 1, characterized by The waste water purification mechanism (3) further comprises a spring buffer device (38), which comprises a pressure bearing seat (381) fixedly installed outside the top end port of the lower liquid guide channel (34), and buffer guide columns (382) fixedly connected to the four corners of the bottom surface of the pressure bearing seat (381). Compression grooves (383) are vertically formed at the four corners of the surface of the support frame board (31). A buffer compression spring (384) is fixedly installed in each compression groove (383). The buffer guide columns (382) at the four corners of the bottom surface of the pressure bearing seat (381) are movably inserted into the compression grooves (383) and fixedly connected to the top end of the buffer compression spring (384) in the grooves.

4. The wastewater recovery device for cyclohexanone production according to claim 3, characterized by A clamping groove (385) is formed on the surface of the pressure bearing seat (381), which cooperates with the elastic rubber pressing strips (332) on the bottom surface of the pressing plate (331) to achieve clamping sealing.

5. The wastewater recovery device for cyclohexanone production according to claim 1, characterized by A plurality of liquid guide plates (333) are fixedly connected in sequence in the upper liquid guide channel (33), and the liquid guide plates (333) are arranged in a stepped manner.

6. The wastewater recovery device for cyclohexanone production according to claim 2, characterized by Further comprising a waste water neutralization assembly (4) for injecting reagents into the waste water treatment jar (1). The wastewater neutralizing assembly (4) comprises a reagent storage tank (41) fixedly installed on the tank cover (12), a liquid pumping device (42) fixedly installed in the reagent storage tank (41) and an annular through pipe (43) fixedly connected in the pretreatment inner cavity (101), the output pipeline of the liquid pumping device (42) is connected with the annular through pipe (43), a plurality of branch pipes (44) are fixedly and equidistantly connected in the annular through pipe (43), and a plurality of reagent outlets (45) are equidistantly and sequentially formed in the bottom surface of the annular through pipe (43) and each branch pipe (44).

7. The wastewater recovery device for cyclohexanone production according to claim 6, characterized by The wastewater treatment tank (1) further comprises a mixing device (2) for stirring and mixing the wastewater in the wastewater treatment tank (1). The mixing device (2) comprises a mixing rod (23) vertically arranged in the filtering inner cavity (102), a plurality of mixing blades (22) fixedly arranged on the mixing rod (23) and a speed reducer (21) fixedly installed on the tank cover (12) and connected with the mixing rod (23).

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