Advanced treatment and resource utilization method for papermaking wastewater

Abstract

The invention discloses a papermaking wastewater advanced treatment and resource utilization method, and belongs to the technical field of wastewater treatment.The base is provided with a separation assembly and a secondary filtration assembly, through the arrangement of the separation assembly and the secondary filtration assembly, primary filtration is conducted through a filter screen, then secondary filtration is conducted through a circular screen drum, and the wastewater treatment effect is remarkably improved; through cooperation of fan-shaped screen bars and an outer scraping rotating plate, filtered waste can be automatically transferred to a storage box, subsequent recycling is facilitated, resourceful treatment of the waste is achieved, the treatment cost is reduced, through arrangement of floating screen bars and a circular screen drum, waste water and the waste can be dynamically separated, blockage of a filter medium is effectively reduced, and the service life of the filter is prolonged. The service life of the equipment is prolonged, regular cleaning and maintenance can be facilitated through sliding connection of the separation shell and the U-shaped shell and up-down movement of the cleaning grate bars, and the operation and maintenance difficulty and cost of the equipment are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to a method for advanced treatment and resource utilization of papermaking wastewater. Background Art

[0002] The papermaking industry is one of the important basic industries in China. However, the wastewater generated in its production process contains a large amount of suspended solids, organic substances and chemical additives. If directly discharged without effective treatment, it will cause serious pollution to the water environment. Traditional papermaking wastewater treatment methods mainly include physical precipitation, chemical flocculation and biological treatment, etc. But these methods generally have problems such as low treatment efficiency, high operating cost and easy generation of secondary pollution. Existing filtration technologies mostly use static sieves or fixed filter beds, which are prone to clogging of filter pores due to fiber accumulation, and need to be frequently shut down for cleaning, seriously affecting the treatment efficiency. Moreover, the separated waste is usually disposed of as solid waste and cannot be effectively recycled, which not only wastes resources but also increases the environmental burden. Therefore, the present invention provides a method for advanced treatment and resource utilization of papermaking wastewater. Summary of the Invention

[0003] Aiming at the defects in the prior art, the present invention provides a method for advanced treatment and resource utilization of papermaking wastewater, which overcomes the problems of clogging of filter pores caused by fiber accumulation, frequent shutdown for cleaning, seriously affecting the treatment efficiency, and the inability to effectively recycle the separated waste.

[0004] To achieve the above object, the present invention provides the following technical solution: An integrated device for advanced treatment and resource utilization of papermaking wastewater, including a base, on which a separation component and a secondary filtration component are provided. The separation component includes a U-shaped housing and a separation housing. On the lower end face of the U-shaped housing, an H-shaped slide plate, a strip-shaped slide plate and a square frame plate are slidably installed. A plurality of floating sieve bars are evenly arranged on the strip-shaped slide plate. A plurality of filter sieve bars are evenly and fixedly arranged on both sides of the square frame plate. A filter screen is formed between the filter sieve bars and the floating sieve bars, and the filter screen is used for the first filtration of the wastewater entering the U-shaped housing. A plurality of cleaning sieve bars are evenly arranged on the H-shaped slide plate. Transmission rods are symmetrically and rotatably installed on the separation housing. A plurality of sector sieve bars are evenly and fixedly arranged on the transmission rods. The sector sieve bars and the cleaning sieve bars are respectively used for cleaning the attachments on the filter sieve bars and the floating sieve bars. The secondary filtration component includes a separation cylinder. A Y-shaped square pipe is provided between the separation cylinder and the U-shaped housing. A circular sieve cylinder is rotatably installed inside the separation cylinder, and the circular sieve cylinder is used for the secondary filtration of the wastewater injected into the separation cylinder through the Y-shaped square pipe. A sealing circular plate is fixedly installed on the lower end face of the Y-shaped square pipe. An annular sliding frame is slidably installed on the sealing circular plate, and the annular sliding frame is used for cleaning the attachments on the surface of the circular sieve cylinder.

[0005] Furthermore, the U-shaped housing is fixedly installed on the base, and the separation housing is slidably installed directly above the U-shaped housing. When the U-shaped housing and the separation housing are engaged, a filter chamber is formed. The Y-shaped square pipe is located directly below the U-shaped housing. Both upper ends of the Y-shaped square pipe are fixedly connected to the U-shaped housing, and the two upper ends directly above the Y-shaped square pipe are symmetrically arranged with respect to the square frame plate.

[0006] Furthermore, a plurality of floating strip plates are uniformly and fixedly arranged on the strip-shaped slide plate. The floating sieve strips are respectively fixedly installed at the upper ends of the corresponding floating strip plates. Both the floating strip plates and the filter sieve strips are slidably engaged with the U-shaped housing. The length of the floating sieve strip is equal to the distance between two relatively arranged filter sieve strips, and both ends of the floating sieve strip are respectively in contact with the corresponding two filter sieve strips.

[0007] Furthermore, the sector sieve strips and the filter sieve strips are arranged at intervals. The distance between two adjacent floating sieve strips is equal to the distance between two adjacent filter sieve strips, and the width of the sector sieve strip is equal to the distance between two adjacent filter sieve strips.

[0008] Furthermore, externally scraping rotating plates are symmetrically and rotatably installed on the separation housing. The externally scraping rotating plates are respectively used to transfer the filtered substances carried on the sector sieve strips of the corresponding transmission rods. Auxiliary scraping plates are symmetrically and slidably installed on the separation housing. The auxiliary scraping plates are used to scrape off the filtered substances remaining on the surfaces of the corresponding externally scraping rotating plates. Storage boxes are symmetrically and fixedly installed on the base. The storage boxes are used to receive the filtered substances transferred by the externally scraping rotating plates.

[0009] Furthermore, a plurality of cleaning strip plates are uniformly and fixedly arranged on both sides of the H-shaped slide plate. The cleaning strip plates are all slidably engaged with the U-shaped housing. The floating sieve strips are fixedly connected to two relatively arranged cleaning strip plates. The cleaning sieve strips and the floating sieve strips are arranged at intervals. The width of the cleaning sieve strip is equal to the distance between two adjacent floating sieve strips, and the length of the cleaning sieve strip is equal to the distance between the two farthest surfaces of two relatively arranged filter sieve strips.

[0010] Furthermore, the circular sieve cylinder is rotatably connected to the sealing circular plate. The circular sieve cylinder is located between the separation cylinder and the sealing circular plate. The lower end of the Y-shaped square pipe is internally communicated with the circular sieve cylinder. A gear set is arranged on the separation cylinder. The gear set is used to drive the circular sieve cylinder to rotate.

[0011] Furthermore, a lower scraping lead screw is fixedly installed on the annular slide frame. A transmission belt pulley is rotatably installed on the sealing circular plate. The transmission belt pulley and the lower scraping lead screw form a screw pair. The circumferential surface of the annular slide frame farthest from the axis of the separation cylinder and the circumferential surface of the circular sieve cylinder closest to the axis of the separation cylinder are on the same circumferential surface.

[0012] Furthermore, square drain pipes are symmetrically and fixedly arranged on the separation cylinder. An auxiliary circular plate is also slidably installed on the lower end surface of the separation cylinder. The diameter of the auxiliary circular plate is equal to the inner diameter of the circular sieve cylinder.

[0013] A method for advanced treatment and resource utilization of papermaking wastewater using an integrated device for advanced treatment and resource utilization of papermaking wastewater, comprising the following steps.

[0014] Step 1: Inject papermaking wastewater into the filter screen formed by the filter bars and the floating bars. The wastewater is filtered under the action of the filter screen, and the filtered wastewater enters the circular sieve cylinder through the Y-shaped square pipe along the gaps of the filter screen.

[0015] Step 2: During the process of the cleaning bars and the floating bars filtering the wastewater, drive the strip-shaped slide plate to move up and down reciprocally, that is, make the floating bars move up and down reciprocally. Intermittently, the two transmission rods rotate, and the rotation directions of the two transmission rods are opposite. The sector-shaped bars on the transmission rods rotate synchronously, and the sector-shaped bars transfer the waste accumulated between two adjacent filter bars and the waste between two adjacent floating bars, thereby improving the filtering effect of the filter screen.

[0016] Step 3: The waste on the filter screen is transferred to the outer scraping rotating plate under the action of the sector-shaped bars. When the axis of the arc surface of the sector-shaped bars rotates to be on the same straight line as the center line of the rotating connection between the outer scraping rotating plate and the separation housing, drive the outer scraping rotating plate to rotate, that is, scrape off the waste transferred on the sector-shaped bars. Finally, the outer scraping rotating plate rotates to the vertically upward position. At this time, the waste on the outer scraping rotating plate falls into the corresponding storage box, and drive the corresponding auxiliary scraper to move downward, so as to push all the remaining waste on the outer scraping rotating plate into the corresponding storage box.

[0017] Step 4: The wastewater entering the circular sieve cylinder along the Y-shaped square pipe is secondarily filtered under the action of the circular sieve cylinder. The filtered wastewater is discharged through the square drain pipe. Under the action of the gear set, drive the circular sieve cylinder to rotate relative to the separation cylinder, thereby improving the filtering effect of the circular sieve cylinder.

[0018] The beneficial effects of the present invention compared with the prior art are: (1) By setting the separation component and the secondary filtration component, the present invention first performs preliminary filtration through the filter screen and then secondary filtration through the circular sieve cylinder, significantly improving the treatment effect of the wastewater. (2) Through the cooperation of the sector-shaped bars and the outer scraping rotating plate, the present invention can automatically transfer the filtered waste to the storage box, facilitating subsequent recycling and utilization, realizing the resource treatment of the waste, and reducing the treatment cost. (3) By setting the floating bars and the circular sieve cylinder, the present invention can dynamically separate the wastewater from the waste, effectively reducing the blockage of the filtering medium and prolonging the service life of the equipment. (4) By setting the sliding connection between the separation housing and the U-shaped housing and the up and down movement of the cleaning bars, the present invention can facilitate regular cleaning and maintenance, reducing the operation and maintenance difficulty and cost of the equipment. Description of the Drawings

[0019] Figure 1 This is the overall structural schematic diagram of the present invention.

[0020] Figure 2 This is the structural schematic diagram at the auxiliary circular plate.

[0021] Figure 3 This is the sectional view of the overall structure of the present invention.

[0022] Figure 4 This is the structural schematic diagram at the Y-shaped square tube of the present invention.

[0023] Figure 5 This is the structural schematic diagram at the H-shaped slide plate of the present invention.

[0024] Figure 6 This is the structural schematic diagram at the outer scraping rotating plate of the present invention.

[0025] Figure 7 It is Figure 6 the partial enlarged schematic diagram at A in

[0026] Figure 8 This is the structural schematic diagram at the cleaning sieve bars of the present invention.

[0027] Figure 9 This is the structural schematic diagram at the floating sieve bars of the present invention.

[0028] Figure 10 This is the sectional view of the separation component of the present invention.

[0029] Figure 11 This is the structural schematic diagram of the second filter component of the present invention.

[0030] Figure 12 This is the structural schematic diagram inside the separation cylinder of the present invention.

[0031] Reference numerals: 101 - base; 102 - U-shaped housing; 103 - separation housing; 104 - separation cylinder; 105 - storage bin; 106 - auxiliary scraper; 107 - auxiliary lead screw; 108 - auxiliary motor; 109 - Y-shaped square tube; 110 - auxiliary electric cylinder; 111 - auxiliary circular plate; 112 - sealing circular plate; 113 - deployment lead screw; 114 - deployment motor; 115 - outer scraping motor; 116 - inner fishing motor; 117 - cleaning motor; 118 - cleaning lead screw; 119 - outer movement motor; 120 - outer movement lead screw; 121 - floating motor; 122 - floating lead screw; 123 - H-shaped slide plate; 124 - strip-shaped slide plate; 125 - square frame plate; 126 - floating strip plate; 127 - cleaning strip plate; 128 - outer scraping rotating plate; 129 - sector sieve bar; 130 - filtering sieve bar; 131 - cleaning sieve bar; 132 - floating sieve bar; 133 - transmission gear ring; 134 - transmission gear; 135 - drive motor; 136 - lower scraping motor; 137 - belt pulley; 138 - lower scraping lead screw; 139 - annular carriage; 140 - circular sieve cylinder; 141 - transmission rod; 142 - square drain pipe. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0033] Embodiment: Refer to Figures 1-12 , an integrated device for the advanced treatment and resource utilization of papermaking wastewater, including a base 101, a separation component is arranged on the base 101, the separation component includes a U-shaped housing 102 and a separation housing 103, the U-shaped housing 102 is fixedly installed on the base 101, the separation housing 103 is slidably installed directly above the U-shaped housing 102, a filtering chamber is formed when the U-shaped housing 102 and the separation housing 103 are joined, a deployment lead screw 113 is rotatably installed on the outer side of the U-shaped housing 102, the deployment lead screw 113 and the separation housing 103 form a screw pair, a deployment motor 114 is fixedly installed on the outer side of the U-shaped housing 102, the output shaft of the deployment motor 114 is fixedly connected to the deployment lead screw 113, starting the deployment motor 114 to drive the deployment lead screw 113 to rotate can make the separation housing 103 move up and down relative to the U-shaped housing 102.

[0034] The lower end surface of the U-shaped housing 102 is slidably mounted with an H-shaped slide plate 123, a strip-shaped slide plate 124, and a square frame plate 125. A plurality of floating sieve bars 132 are uniformly arranged on the strip-shaped slide plate 124, and a plurality of floating strip plates 126 are uniformly and fixedly arranged on the strip-shaped slide plate 124. The floating sieve bars 132 are respectively fixedly mounted on the upper ends of the corresponding floating strip plates 126. A first sieve plate is formed between the plurality of floating sieve bars 132. A plurality of filter sieve bars 130 are uniformly and fixedly arranged on both sides of the square frame plate 125. A second sieve plate is formed between the plurality of filter sieve bars 130 on the same side of the square frame plate 125. A filter net is formed between the filter sieve bars 130 and the floating sieve bars 132, that is, a filter net is formed between the first sieve plate and the two second sieve plates. The filter net is used for the first filtration of the waste water entering the U-shaped housing 102.

[0035] Both the floating strip plate 126 and the filter sieve bar 130 are slidably engaged with the U-shaped housing 102. The length of the floating sieve bar 132 is equal to the distance between the two relatively arranged filter sieve bars 130. The two ends of the floating sieve bar 132 are respectively in contact with the corresponding two filter sieve bars 130. An outer moving lead screw 120 and a floating lead screw 122 are rotatably mounted on the outside of the U-shaped housing 102. The outer moving lead screw 120 and the square frame plate 125 form a screw pair, and the floating lead screw 122 and the strip-shaped slide plate 124 form a screw pair. An outer moving motor 119 and a floating motor 121 are fixedly mounted on the outside of the U-shaped housing 102. The output shaft of the outer moving motor 119 is fixedly connected to the outer moving lead screw 120, and the output shaft of the floating motor 121 is fixedly connected to the floating lead screw 122.

[0036] Start the floating motor 121 to drive the floating lead screw 122 to rotate, so that the strip-shaped slide plate 124 moves up and down relative to the U-shaped housing 102. The floating strip plates 126 on the strip-shaped slide plate 124 move synchronously, and then the floating sieve bars 132 move synchronously. Start the outer moving motor 119 to drive the outer moving lead screw 120 to rotate, so that the square frame plate 125 moves up and down relative to the U-shaped housing 102, and the filter sieve bars 130 on the square frame plate 125 move synchronously.

[0037] Driving rods 141 are symmetrically and rotatably mounted on the separation housing 103. Inner fishing motors 116 are symmetrically and fixedly mounted on the separation housing 103. The output shafts of the inner fishing motors 116 are fixedly connected to the corresponding driving rods 141. A plurality of sector sieve bars 129 are uniformly and fixedly arranged on the driving rods 141. An arc-shaped sieve plate is formed between the plurality of sector sieve bars 129 on the same driving rod 141. The sector sieve bars 129 and the filter sieve bars 130 are arranged at intervals. The distance between two adjacent floating sieve bars 132 is equal to the distance between two adjacent filter sieve bars 130. The width of the sector sieve bar 129 is equal to the distance between two adjacent filter sieve bars 130.

[0038] Start the inner fishing motor 116 to drive the corresponding transmission rod 141 to rotate. The sector sieve bars 129 on the transmission rod 141 rotate synchronously. The sector sieve bars 129 pass through the gaps between two adjacent filter sieve bars 130 and the gaps between two adjacent floating sieve bars 132, so as to scrape and transfer the accumulated waste on the gaps between two adjacent filter sieve bars 130 and the gaps between two adjacent floating sieve bars 132.

[0039] The outer scraping rotating plates 128 are symmetrically and rotatably installed on the separation housing 103. The outer scraping rotating plates 128 are respectively used to transfer the filtered substances carried on the sector sieve bars 129 on the corresponding transmission rods 141. The outer scraping motors 115 are symmetrically and fixedly installed on the separation housing 103. The output shafts of the outer scraping motors 115 are fixedly connected to the corresponding outer scraping rotating plates 128. The auxiliary scraping plates 106 are symmetrically and slidably installed on the separation housing 103. The auxiliary scraping plates 106 are used to scrape off the filtered substances remaining on the surfaces of the corresponding outer scraping rotating plates 128. The storage boxes 105 are symmetrically and fixedly installed on the base 101. The storage boxes 105 are used to receive the filtered substances transferred by the outer scraping rotating plates 128. The auxiliary lead screws 107 are rotatably installed on the storage boxes 105. The auxiliary motors 108 are also fixedly installed on the storage boxes 105. The output shafts of the auxiliary motors 108 are fixedly connected to the corresponding auxiliary lead screws 107. The auxiliary lead screws 107 and the corresponding auxiliary scraping plates 106 form a screw pair.

[0040] In the initial position, the outer scraping rotating plates 128 are in a horizontal state. The filter sieve bars 130 are located at the position farthest from the lower surface of the base 101. The sector sieve bars 129 are located between the outer scraping rotating plates 128 and the corresponding second sieve plates.

[0041] Inject papermaking wastewater into the filter net formed by the filter sieve bars 130 and the floating sieve bars 132. The wastewater is filtered under the action of the filter net formed by the filter sieve bars 130 and the floating sieve bars 132. The filtered wastewater moves to the outside of the filter net along the gaps of the filter net. During the process of the cleaning sieve bars 131 and the floating sieve bars 132 filtering the wastewater, start the floating motor 121 to drive the strip-shaped slide plate 124 to reciprocate up and down, that is, to make the floating sieve bars 132 reciprocate up and down, so that the first sieve plate moves up and down inside the U-shaped housing 102, that is, to make the wastewater inside the U-shaped housing 102 float up and down, so that the waste inside the filter net floats up and down, that is, to reduce the blockage speed of the first sieve plate, and further improve the filtering effect of the first sieve plate.

[0042] Moreover, two inner fishing motors 116 are started, and the two transmission rods 141 rotate intermittently. That is, when one of the two transmission rods 141 rotates, the other transmission rod 141 does not rotate. The rotation directions of the two transmission rods 141 are opposite. The sector sieve bars 129 on the transmission rods 141 rotate synchronously, which causes the arc-shaped sieve plate to rotate. The end of the sector sieve bar 129 that is farthest from the corresponding transmission rod 141 rotates towards the direction close to the filter net, that is, the waste accumulated in the gap between two adjacent filter sieve bars 130 and the waste accumulated in the gap between two adjacent floating sieve bars 132 are scraped off. And the waste rotates synchronously under the action of the arc-shaped sieve plate, that is, the waste in the filter net is fished out, thereby reducing the accumulation of waste in the filter net, that is, improving the filtering effect of the filter net.

[0043] The waste on the filter net is transferred to the outer scraping rotating plate 128 under the action of the arc-shaped sieve plate. Finally, the axis of the arc surface of the sector sieve bar 129 rotates to be on the same straight line as the center line of the rotating connection between the outer scraping rotating plate 128 and the separation housing 103. At this time, the end of the outer scraping rotating plate 128 that is farthest from the axis of the corresponding outer scraping motor 115 contacts the inner arc surface of the corresponding sector sieve bar 129. Then, the corresponding outer scraping motor 115 of the outer scraping rotating plate 128 is started, which causes the outer scraping rotating plate 128 to rotate. Under the action of the outer scraping rotating plate 128, the waste on the arc-shaped sieve plate is scraped off. Finally, the outer scraping rotating plate 128 rotates to the vertically upward position. At this time, the waste on the outer scraping rotating plate 128 falls into the corresponding storage box 105. Then, the auxiliary motor 108 is started to drive the auxiliary lead screw 107 to rotate, which causes the corresponding auxiliary scraper 106 to move downward, so as to push all the remaining waste on the outer scraping rotating plate 128 into the corresponding storage box 105.

[0044] When the outer scraping rotating plate 128 rotates to the vertically upward position, the corresponding inner fishing motor 116 is started to make the arc-shaped sieve plate return to the initial position. Then, another inner fishing motor 116 is started to drive the corresponding arc-shaped sieve plate to fish out the waste in the filter net. That is, under the action of the two arc-shaped sieve plates, the waste in the filter net is fished out from both sides of the filter net.

[0045] A plurality of cleaning sieve bars 131 are uniformly arranged on the H-shaped slide plate 123. A plurality of cleaning strip plates 127 are uniformly and fixedly arranged on both sides of the H-shaped slide plate 123. The cleaning strip plates 127 are all in sliding fit with the U-shaped housing 102. The floating sieve bar 132 is fixedly connected to two relatively arranged cleaning strip plates 127. The cleaning sieve bars 131 and the floating sieve bars 132 are arranged at intervals. The width of the cleaning sieve bar 131 is equal to the distance between two adjacent floating sieve bars 132. The length of the cleaning sieve bar 131 is equal to the distance between the surfaces of the two relatively arranged filter sieve bars 130 that are farthest apart. A cleaning lead screw 118 is also rotatably installed on the outer side of the U-shaped housing 102. The cleaning lead screw 118 and the H-shaped slide plate 123 form a screw pair. A cleaning motor 117 is also fixedly installed on the outer side of the U-shaped housing 102. The output shaft of the cleaning motor 117 is fixedly connected to the cleaning lead screw 118. Starting the cleaning motor 117 to drive the cleaning lead screw 118 to rotate can make the H-shaped slide plate 123 move up and down relative to the U-shaped housing 102. The cleaning strip plates 127 on the H-shaped slide plate 123 move synchronously, and further make the cleaning sieve bars 131 on the cleaning strip plates 127 move synchronously.

[0046] In the initial position, the H-shaped slide plate 123 is located at the position closest to the base 101. At this time, the upper surface of the cleaning sieve bar 131 and the inner surface of the U-shaped housing 102 are on the same plane. The two sides of the cleaning sieve bar 131 are located between the corresponding two filter sieve bars 130.

[0047] After the separation component has been running for a long time, waste that cannot be cleaned by the sector sieve bars 129 is likely to accumulate inside. Therefore, it is necessary to regularly clean this part of the waste. At this time, start the deployment motor 114 to drive the separation housing 103 to move upward. The outer scraping rotating plate 128 and the sector sieve bars 129 on the separation housing 103 move upward synchronously. Eventually, the separation housing 103 moves to the position farthest from the base 101. Then start the cleaning motor 117 to drive the cleaning sieve bars 131 to move upward synchronously, so that the upper surfaces of the cleaning sieve bars 131 and the floating sieve bars 132 are on the same plane. During the upward movement of the cleaning sieve bars 131, scrape and clean the residues attached to the gaps between two adjacent filtering sieve bars 130 and the residues attached to the gaps between two adjacent floating sieve bars 132. After the upper surfaces of the cleaning sieve bars 131 and the floating sieve bars 132 are on the same plane, start the cleaning motor 117 and the floating motor 121, so that the cleaning sieve bars 131 and the floating sieve bars 132 move upward synchronously. Eventually, the cleaning sieve bars 131 and the floating sieve bars 132 move to the position farthest from the base 101, and start the outward movement motor 119 to make all the filtering sieve bars 130 move downward. Since the filtering sieve bars 130 are slidably mated with the U-shaped housing 102, under the action of the U-shaped housing 102, scrape and clean the residues attached to the filtering sieve bars 130. Eventually, the filtering sieve bars 130 move to the position closest to the base 101. At this time, the upper end surfaces of the filtering sieve bars 130 and the inner surfaces of the U-shaped housing 102 are on the same plane, facilitating subsequent cleaning of the residues inside the U-shaped housing 102 by the staff.

[0048] A secondary filtration component is provided on the base 101. The secondary filtration component includes a separation cylinder 104. A Y-shaped square pipe 109 is provided between the separation cylinder 104 and the U-shaped housing 102. The Y-shaped square pipe 109 is located directly below the U-shaped housing 102. Both ends above the Y-shaped square pipe 109 are fixedly connected to the U-shaped housing 102. The two ends directly above the Y-shaped square pipe 109 are symmetrically arranged with respect to the square frame plate 125. A circular sieve cylinder 140 is rotatably installed inside the separation cylinder 104. The sieve slot width of the circular sieve cylinder 140 is smaller than the sieve slot width of the filter mesh. The circular sieve cylinder 140 is used for secondary filtration of the wastewater injected into the separation cylinder 104 by the Y-shaped square pipe 109. Square drain pipes 142 are symmetrically and fixedly provided on the separation cylinder 104.

[0049] The circular sieve cylinder 140 is rotatably connected to the sealing circular plate 112. The lower end surface of the Y-shaped square tube 109 is fixedly installed with the sealing circular plate 112. The circular sieve cylinder 140 is located between the separation cylinder 104 and the sealing circular plate 112. The lower end of the Y-shaped square tube 109 is internally communicated with the circular sieve cylinder 140. A gear set is provided on the separation cylinder 104, and the gear set is used to drive the circular sieve cylinder 140 to rotate. The gear set includes a transmission gear ring 133 and a transmission gear 134. The transmission gear ring 133 is fixedly installed on the circular sieve cylinder 140, and the inner diameter of the transmission gear ring 133 is equal to the inner diameter of the circular sieve cylinder 140. A driving motor 135 is fixedly installed on the upper end surface of the separation cylinder 104, and the transmission gear 134 is fixedly installed on the output shaft of the driving motor 135. The transmission gear 134 and the transmission gear ring 133 are engaged to form a gear pair.

[0050] Start the driving motor 135 to drive the transmission gear 134 to rotate. Under the action of the transmission gear ring 133, the circular sieve cylinder 140 rotates relative to the separation cylinder 104, so that the wastewater in the separation cylinder 104 rotates, thereby improving the filtering effect of the circular sieve cylinder 140 on the wastewater. The wastewater filtered by the circular sieve cylinder 140 is discharged from the square drain pipe 142.

[0051] An annular sliding frame 139 is slidably installed on the sealing circular plate 112. The annular sliding frame 139 is used to clean the attachments on the surface of the circular sieve cylinder 140. A lower scraping screw rod 138 is fixedly installed on the annular sliding frame 139. A transmission belt pulley 137 is rotatably installed on the sealing circular plate 112. The transmission belt pulley 137 and the lower scraping screw rod 138 form a screw pair. The circumferential surface of the annular sliding frame 139 farthest from the axis of the separation cylinder 104 and the circumferential surface of the circular sieve cylinder 140 closest to the axis of the separation cylinder 104 are on the same circumferential surface. A lower scraping motor 136 is fixedly installed on the sealing circular plate 112. A belt pulley is fixedly installed on the output shaft of the lower scraping motor 136. A belt is provided between the belt pulley on the output shaft of the lower scraping motor 136 and the transmission belt pulley 137. An auxiliary circular plate 111 is also slidably installed on the lower end surface of the separation cylinder 104. The diameter of the auxiliary circular plate 111 is equal to the inner diameter of the circular sieve cylinder 140. An auxiliary electric cylinder 110 is fixedly installed on the outer wall of the separation cylinder 104. The end of the piston rod of the auxiliary electric cylinder 110 is fixedly connected to the auxiliary circular plate 111.

[0052] When in the initial position, the annular carriage 139 is at the position farthest from the lower surface of the base 101. After the circular sieve tube 140 operates for a long time, the waste accumulated inside the circular sieve tube 140 can easily affect the passage of wastewater. At this time, start the auxiliary electric cylinder 110 to drive the auxiliary circular plate 111 to move downward, so that the lower end of the circular sieve tube 140 is opened. Then start the lower scraping motor 136 to drive the belt pulley 137 to rotate. Under the action of the lower scraping lead screw 138, the annular carriage 139 moves downward. Under the action of the annular carriage 139, the attachments on the inner wall of the circular sieve tube 140 are scraped downward and discharged from the lower end of the circular sieve tube 140. The staff can assist in cleaning the waste on the auxiliary circular plate 111.

[0053] Working principle: The papermaking wastewater is discharged into the U-shaped housing 102 from above the filter screen formed by the cleaning sieve bars 131 and the floating sieve bars 132. The waste in the papermaking wastewater is filtered under the action of the filter screen. Then, under the action of the sector sieve bars 129, the waste on the filter screen is fished out, and under the action of the auxiliary scraper 106 and the outer scraping rotating plate 128, the waste is pushed into the storage box 105, which is convenient for subsequent recycling of the waste. During the operation of the sector sieve bars 129, the floating sieve bars 132 move up and down, so that the wastewater and waste in the filter screen move up and down, thereby improving the wastewater passage of the filter screen.

[0054] The wastewater filtered by the filter screen enters the inner side of the circular sieve tube 140 in the separation cylinder 104 along the Y-shaped square pipe 109. Under the action of the circular sieve tube 140, the wastewater is filtered for the second time and discharged from the square drain pipe 142. During the operation of the circular sieve tube 140, the circular sieve tube 140 is driven to rotate, so that the wastewater and waste inside the separation cylinder 104 move, thereby improving the wastewater passage of the circular sieve tube 140.

[0055] The present invention also discloses a method for deep treatment and resource utilization of papermaking wastewater using an integrated device for deep treatment and resource utilization of papermaking wastewater, including the following steps.

[0056] Step 1: Inject papermaking wastewater into the filter screen formed by the filter sieve bars 130 and the floating sieve bars 132. The wastewater is filtered under the action of the filter screen, and the filtered wastewater enters the circular sieve tube 140 along the gaps of the filter screen through the Y-shaped square pipe 109.

[0057] Step 2: During the process of the cleaning sieve bar 131 and the floating sieve bar 132 filtering the wastewater, drive the strip-shaped slide plate 124 to reciprocate up and down, that is, make the floating sieve bar 132 reciprocate up and down. Intermittently, the two transmission rods 141 rotate. The rotation directions of the two transmission rods 141 are opposite. The sector sieve bars 129 on the transmission rods 141 rotate synchronously. The sector sieve bars 129 transfer the waste accumulated between two adjacent filtering sieve bars 130 and the waste between two adjacent floating sieve bars 132, thereby improving the filtering effect of the filter net.

[0058] Step 3: The waste on the filter net is transferred to the outer scraping rotating plate 128 under the action of the sector sieve bar 129. When the axis of the arc surface of the sector sieve bar 129 rotates to be on the same straight line as the center line of the rotating connection between the outer scraping rotating plate 128 and the separation housing 103, drive the outer scraping rotating plate 128 to rotate, that is, scrape off the waste transferred on the sector sieve bar 129. Finally, the outer scraping rotating plate 128 rotates to the vertically upward position. At this time, the waste on the outer scraping rotating plate 128 falls into the corresponding storage box 105, and drive the corresponding auxiliary scraping plate 106 to move downward, so as to push all the remaining waste on the outer scraping rotating plate 128 into the corresponding storage box 105.

[0059] Step 4: The wastewater entering the circular sieve cylinder 140 along the Y-shaped square pipe 109 is secondarily filtered under the action of the circular sieve cylinder 140. The filtered wastewater is discharged through the square drain pipe 142. Under the action of the gear set, drive the circular sieve cylinder 140 to rotate relative to the separation cylinder 104, thereby improving the filtering effect of the circular sieve cylinder 140.

[0060] The present invention is not limited to the above specific embodiments. Those skilled in the art can make various changes starting from the above concepts without creative labor, and all fall within the protection scope of the present invention.

Claims

1. An integrated device for advanced treatment and resource utilization of papermaking wastewater, including a base (101), characterized in that: A separation component and a secondary filtration component are arranged on the base (101). The separation component includes a U-shaped shell (102) and a separation shell (103). An H-shaped slide plate (123), a strip-shaped slide plate (124), and a square frame plate (125) are slidably installed on the lower end surface of the U-shaped shell (102). A plurality of floating sieve bars (132) are evenly arranged on the strip-shaped slide plate (124). A plurality of filter sieve bars (130) are evenly and fixedly arranged on both sides of the square frame plate (125). A filter net is formed between the filter sieve bars (130) and the floating sieve bars (132), and the filter net is used for the first filtration of the wastewater entering the U-shaped shell (102). A plurality of cleaning sieve bars (131) are evenly arranged on the H-shaped slide plate (123). Transmission rods (141) are symmetrically and rotatably installed on the separation shell (103). A plurality of sector sieve bars (129) are evenly and fixedly arranged on the transmission rods (141). The sector sieve bars (129) and the cleaning sieve bars (131) are respectively used for cleaning the attachments on the filter sieve bars (130) and the floating sieve bars (132). The secondary filtration component includes a separation cylinder (104). A Y-shaped square pipe (109) is arranged between the separation cylinder (104) and the U-shaped shell (102). A circular sieve cylinder (140) is rotatably installed inside the separation cylinder (104), and the circular sieve cylinder (140) is used for the secondary filtration of the wastewater injected into the separation cylinder (104) through the Y-shaped square pipe (109). A sealing circular plate (112) is fixedly installed on the lower end surface of the Y-shaped square pipe (109). An annular sliding frame (139) is slidably installed on the sealing circular plate (112), and the annular sliding frame (139) is used for cleaning the attachments on the surface of the circular sieve cylinder (140).

2. The integrated device for advanced treatment and resource utilization of papermaking wastewater according to claim 1, characterized in that: The U-shaped shell (102) is fixedly installed on the base (101). The separation shell (103) is slidably installed directly above the U-shaped shell (102). A filter chamber is formed when the U-shaped shell (102) and the separation shell (103) are joined. The Y-shaped square pipe (109) is located directly below the U-shaped shell (102). Both upper ends of the Y-shaped square pipe (109) are fixedly connected to the U-shaped shell (102), and the two upper ends of the Y-shaped square pipe (109) are symmetrically arranged relative to the square frame plate (125).

3. The integrated device for advanced treatment and resource utilization of papermaking wastewater according to claim 2, characterized in that: A plurality of floating strip plates (126) are evenly and fixedly arranged on the strip-shaped slide plate (124). The floating sieve bars (132) are respectively fixedly installed at the upper end parts of the corresponding floating strip plates (126). Both the floating strip plates (126) and the filter sieve bars (130) are slidably matched with the U-shaped shell (102). The length of the floating sieve bars (132) is equal to the distance between two relatively arranged filter sieve bars (130). Both ends of the floating sieve bars (132) are in contact with the corresponding two filter sieve bars (130).

4. An integrated device for advanced treatment and resource utilization of papermaking wastewater according to claim 3, characterized in that: The sector sieve bars (129) and the filter sieve bars (130) are arranged at intervals. The distance between two adjacent floating sieve bars (132) is equal to the distance between two adjacent filter sieve bars (130). The width of the sector sieve bar (129) is equal to the distance between two adjacent filter sieve bars (130).

5. An integrated device for advanced treatment and resource utilization of papermaking wastewater according to claim 4, characterized in that: On the separation housing (103), outer scraping rotating plates (128) are symmetrically and rotatably installed. The outer scraping rotating plates (128) are respectively used to transfer the filtered substances carried on the sector sieve bars (129) of the corresponding transmission rods (141). On the separation housing (103), auxiliary scraping plates (106) are symmetrically and slidably installed. The auxiliary scraping plates (106) are used to scrape off the filtered substances remaining on the surfaces of the corresponding outer scraping rotating plates (128). On the base (101), storage bins (105) are symmetrically and fixedly installed. The storage bins (105) are used to receive the filtered substances transferred by the outer scraping rotating plates (128).

6. An integrated device for advanced treatment and resource utilization of papermaking wastewater according to claim 5, characterized in that: On both sides of the H-shaped sliding plate (123), a plurality of cleaning strip plates (127) are uniformly and fixedly arranged. The cleaning strip plates (127) are all in sliding fit with the U-shaped housing (102). The floating sieve bars (132) are fixedly connected to two opposite cleaning strip plates (127). The cleaning sieve bars (131) and the floating sieve bars (132) are arranged at intervals. The width of the cleaning sieve bar (131) is equal to the distance between two adjacent floating sieve bars (132). The length of the cleaning sieve bar (131) is equal to the distance between the farthest surfaces of two opposite filter sieve bars (130).

7. An integrated device for advanced treatment and resource utilization of papermaking wastewater according to claim 6, characterized in that: The circular sieve cylinder (140) is rotatably connected to the sealing circular plate (112). The circular sieve cylinder (140) is located between the separation cylinder (104) and the sealing circular plate (112). The lower end of the Y-shaped square pipe (109) communicates with the inside of the circular sieve cylinder (140). A gear set is arranged on the separation cylinder (104), and the gear set is used to drive the circular sieve cylinder (140) to rotate.

8. The integrated device for advanced treatment and resource utilization of papermaking wastewater according to claim 7, characterized in that: On the annular sliding frame (139), a lower scraping screw rod (138) is fixedly installed. On the sealing circular plate (112), a transmission belt pulley (137) is rotatably installed. The transmission belt pulley (137) and the lower scraping screw rod (138) form a screw pair. The circumferential surface of the annular sliding frame (139) farthest from the axis of the separation cylinder (104) and the circumferential surface of the circular sieve cylinder (140) closest to the axis of the separation cylinder (104) are on the same circumferential surface.

9. An integrated device for advanced treatment and resource utilization of papermaking wastewater according to claim 8, characterized in that: On the separation cylinder (104), square drain pipes (142) are symmetrically and fixedly arranged. An auxiliary circular plate (111) is also slidably installed on the lower end surface of the separation cylinder (104). The diameter of the auxiliary circular plate (111) is equal to the inner diameter of the circular sieve cylinder (140).

10. A method for advanced treatment and resource utilization of papermaking wastewater using the integrated device according to any one of claims 1-9, characterized in that, Including the following steps: Step 1: Inject papermaking wastewater into the filter net formed by the filter sieve bars (130) and the floating sieve bars (132). The wastewater is filtered under the action of the filter net. The filtered wastewater enters the circular sieve cylinder (140) through the Y-shaped square pipe (109) along the gaps of the filter net. Step 2: During the process of filtering wastewater by the cleaning sieve bar (131) and the floating sieve bar (132), drive the strip-shaped slide plate (124) to reciprocate up and down, that is, make the floating sieve bar (132) reciprocate up and down, intermittently causing the two transmission rods (141) to rotate. The rotation directions of the two transmission rods (141) are opposite, and the sector sieve bars (129) on the transmission rods (141) rotate synchronously. The sector sieve bars (129) transfer the waste accumulated between two adjacent filtering sieve bars (130) and the waste between two adjacent floating sieve bars (132), thereby improving the filtering effect of the filter net; Step 3: The waste on the filter net is transferred to the outer scraping rotating plate (128) under the action of the sector sieve bar (129). When the axis of the arc surface of the sector sieve bar (129) rotates to be on the same straight line as the center line of the rotation connection between the outer scraping rotating plate (128) and the separation housing (103), drive the outer scraping rotating plate (128) to rotate, that is, scrape off the waste transferred on the sector sieve bar (129). Finally, make the outer scraping rotating plate (128) rotate to the vertically upward position. At this time, the waste on the outer scraping rotating plate (128) falls into the corresponding storage box (105), and drive the corresponding auxiliary scraping plate (106) to move downward, so as to push all the remaining waste on the outer scraping rotating plate (128) into the corresponding storage box (105); Step 4: The wastewater entering the circular sieve cylinder (140) along the Y-shaped square pipe (109) is secondarily filtered under the action of the circular sieve cylinder (140). The filtered wastewater is discharged through the square drain pipe (142). Under the action of the gear set, drive the circular sieve cylinder (140) to rotate relative to the separation cylinder (104), thereby improving the filtering effect of the circular sieve cylinder (140).

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