Optical fiber production wastewater treatment system

Abstract

The utility model relates to the technical field of optical fiber wastewater treatment, in particular to an optical fiber production wastewater treatment system, aims at solving the technical problem of overcoming the defect of low wastewater treatment efficiency in the prior art, and is mainly realized by the following technical scheme. Comprising a pretreatment unit and an evaporation unit, the pretreatment unit is connected with the evaporation unit through a conveying pipe, the pretreatment unit comprises a precipitation device and an adjusting device, the evaporation unit comprises a separation chamber, a heat exchange chamber, a compressor, a circulating part and a discharging part, the separation chamber is connected with the heat exchange chamber through a feeding pipe and the circulating part, and the separation chamber is connected with the compressor and the discharging part. The compressor is further connected with the heat exchange chamber, the separation chamber comprises a separation cavity and a cleaning part, the heat exchange chamber comprises a heat exchange cavity, a heat exchanger and a scale reduction part, the adjusting device is arranged to reduce colloid entering the evaporation unit, impurity crystallization adhesion is reduced through the cleaning part and the scale reduction part, heat exchange operation is prevented from being affected, and the wastewater treatment efficiency is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of optical fiber wastewater treatment, in particular to a wastewater treatment system for optical fiber production. Background Art

[0002] With the development of China's optical cable communication industry, as the most basic component in optical cable communication, the production of optical fibers is also developing rapidly. The wastewater treatment in the optical fiber production process is generally used as a supporting project for the optical fiber tail gas purification project. After the optical fiber tail gas is treated by water spraying, electrostatic precipitation and alkali solution absorption, the tail gas reaches the discharge standard. After the harmful substances in the tail gas are absorbed by spraying and alkali solution, hydrochloric acid, hypochlorous acid, hydrofluoric acid and silica colloidal substances are formed in the water. Therefore, the optical fiber wastewater mainly comes from the discharged water of the optical fiber production tail gas treatment. Its sources are mainly the acidic water discharged from the spray tower and the electrostatic precipitator, and a small amount of waste alkali solution discharged from the absorption tower. In order to meet the national wastewater discharge standards, it is necessary to treat the optical fiber wastewater.

[0003] In the prior art, an MVR evaporation device is directly used for evaporation crystallization. Although the treated industrial wastewater can be directly discharged, the precipitated salt crystals may adhere to the separator or heat exchanger and cannot be directly discharged, which affects the subsequent heat exchange of the wastewater in contact and reduces the subsequent wastewater treatment efficiency. Moreover, the existing wastewater directly enters the MVR evaporation device for wastewater treatment after the pH is adjusted by the brine tank. There are still flocculent impurities in the wastewater, and the failure to treat the impurities will also affect the subsequent wastewater treatment efficiency. Summary of the Utility Model

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the defect of low wastewater treatment efficiency in the prior art, so as to provide a wastewater treatment system for optical fiber production.

[0005] The above technical object of the utility model is achieved by the following technical solutions:

[0006] An optical fiber production wastewater treatment system includes a pretreatment unit and an evaporation unit. The pretreatment unit and the evaporation unit are connected by a delivery pipe, and a feed pump is arranged on the delivery pipe. The pretreatment unit includes a precipitation device and an adjustment device. The precipitation device and the adjustment device are arranged in parallel and connected by an adjustment pipe. The evaporation unit includes a separation chamber, a heat exchange chamber, a compressor, a circulation component, and a discharge component. The delivery pipe is connected to the middle of one side of the separation chamber. The separation chamber and the heat exchange chamber are arranged in parallel and connected by a feeding pipe. The separation chamber and the heat exchange chamber are also connected by a circulation component. The top of the separation chamber is connected to the compressor, and the compressor is also connected to one side near the top of the heat exchange chamber. The bottom of the separation chamber is also connected to the discharge component. The separation chamber includes a separation cavity and a cleaning component, and the cleaning component is arranged at the top inside the separation cavity. The heat exchange chamber includes a heat exchange cavity, a heat exchanger, and a scale reduction component. The heat exchanger is arranged on one side near the top inside the heat exchange cavity, and the scale reduction component is arranged at both ends of the top and the bottom of the heat exchanger and controls the rotation of the heat exchanger.

[0007] By adopting the above technical solution, the salt-containing wastewater from optical fiber production first enters the pretreatment unit for precipitation treatment and adjustment treatment. After coagulation precipitation in the precipitation device, it enters the adjustment device to adjust the pH value to neutral, and then is transported to the evaporation unit. The treated salt-containing wastewater is evaporated and separated into solid salt and clean condensed water in the evaporation unit. The condensed water can be recycled, while the solid salt is dried and output. In the evaporation unit, the wastewater first enters the separation chamber, enters the heat exchange chamber for heating through the circulation component connected to the separation chamber, and then the wastewater and solid materials are evaporated and separated in the separation chamber. The circulation pump enables the wastewater to continuously circulate and heat between the heat exchange chamber and the separation chamber for evaporation. When the concentration of the wastewater reaches a certain level, the discharge component pumps out the wastewater and centrifugally separates it. During the continuous heating and evaporation cycle, the steam at the top inside the separation chamber can be reused and sent into the heat exchange chamber to reduce the treatment energy consumption and save energy.

[0008] Further, the precipitation device includes a precipitation tank body and a plurality of precipitation partitions with through holes. The precipitation partitions are arranged obliquely and staggeredly. The height of each precipitation partition on the side close to the center of the precipitation tank body is lower than the height on the side close to the side wall of the precipitation tank body. Wastewater inlet pipes and wastewater outlet pipes are arranged on both side walls of the precipitation tank body. The wastewater inlet pipe is arranged above the wastewater outlet pipe. The wastewater outlet pipe is connected to the adjustment pipe and communicates with the adjustment device. A coagulant aid inlet pipe is arranged near the top on the side of the precipitation tank body far from the wastewater inlet pipe.

[0009] By adopting the above technical solution, the wastewater enters the sedimentation tank body through the wastewater inlet pipe and impacts and contacts with the sedimentation partition plate. On the one hand, the sedimentation partition plate realizes the diversion of wastewater and reduces the setting of additional stirring devices. On the other hand, the wastewater impacts with the sedimentation partition plate, so that the colloids in the wastewater are destabilized and collided to achieve a better coagulation aid effect. The coagulation aid also enters the sedimentation tank along the sedimentation partition plate, thereby increasing the contact time and removal area between the wastewater and the coagulation aid, improving the subsequent sedimentation effect, facilitating the removal of most of the colloids in the wastewater, and also facilitating subsequent adjustment and treatment.

[0010] Furthermore, the adjustment device includes a conditioning tank and a chemical addition pipe. One end of the adjustment pipe far from the wastewater outlet is connected to the upper side of one side of the conditioning tank. The chemical addition pipe is arranged on the upper side of the other side of the conditioning tank far from the adjustment pipe. The chemical addition pipe extends into the conditioning tank. A plurality of stirring members are arranged in the conditioning tank. The axis of the stirring members is arranged along the width direction of the conditioning tank. A delivery port connected to a delivery pipe is arranged at the bottom of the side of the conditioning tank far from the adjustment pipe. A coarse filter member is arranged on the delivery port.

[0011] By adopting the above technical solution, the wastewater treated by sedimentation enters the conditioning tank to adjust the pH value, wastewater volume, water quality, etc. The chemical addition pipe is set for chemical addition to treat the wastewater, preventing the wastewater from changing too much over time and affecting the treatment of subsequent equipment. At the same time, the treatment by the conditioning tank can reduce the subsequent operation load, avoid the blockage of subsequent pipeline equipment caused by substances such as colloids, and ensure the stability of the wastewater treatment process.

[0012] Furthermore, the adjustment device further includes a scum cleaning device. The scum cleaning device includes a cleaning scraper and a cleaning drive. The cleaning scraper is arranged along the length direction of the conditioning tank. The cleaning drive controls the cleaning scraper to move along the width direction of the conditioning tank. A slag collection tank is also arranged along the length direction of the conditioning tank on the front side outside the conditioning tank. The bottom of the slag collection tank is communicated with the conditioning tank and is provided with a filtering partition net.

[0013] By adopting the above technical solution, most of the colloids in the wastewater precipitate and flocculate in the sedimentation tank body, but some still enter the conditioning tank. Therefore, a scum cleaning device is arranged on the conditioning tank. The cleaning scraper scrapes the surface scum and collects it into the slag collection tank. The slag collection tank is communicated with the conditioning tank through the filtering partition net, so as to achieve the purpose of separating impurities without affecting the wastewater treatment.

[0014] Furthermore, two feed pipes with parallel axes are arranged on the side of the separation cavity far from the delivery pipe. The circulation member includes a circulation pipe and a circulation pump. The circulation pump is arranged on the circulation pipe. One end of the circulation pipe is connected to the rear side wall of the separation cavity near the bottom, and the other end is connected to the center of the top of the heat exchange cavity. The top of the separation chamber is connected to the compressor through a steam inlet pipe. The bottom of the separation cavity is in a conical shape with diameters decreasing in sequence, and the center of the bottom is connected to the discharging member through a discharging pipe. A discharging pump is arranged on the discharging pipe.

[0015] By adopting the above technical solution, the wastewater enters the separation cavity, and the circulation pipe is sent into the heat exchange cavity under the forced action of the circulation pump for heating, and then enters the separation cavity through the feeding pipe for gas-liquid separation, so as to continuously heat and concentrate the wastewater until the concentration of the wastewater reaches a certain requirement, and then it is forced to be pumped by the discharge pump and processed by the discharge pipe.

[0016] Furthermore, an evaporator is also provided on the steam inlet pipe. The evaporator is also connected to a condensate water tank through a pipeline. The condensate water tank is connected to the cleaning member through a condensate water pipe. The cleaning member includes a spray ring pipe and a plurality of spray nozzles. The spray ring pipe is arranged along the inner diameter of the separation cavity and is connected to the condensate water pipe. The spray nozzles are opened at the bottom of the spray ring pipe; the discharging member includes a centrifuge and a liquid storage tank. The other end of the discharge pipe is connected to the centrifuge. A liquid pipe is arranged on the centrifuge and is connected to the liquid storage tank. A solid material outlet is also provided on the centrifuge.

[0017] By adopting the above technical solution, the steam and part of the liquid brought by the steam inlet pipe above the separation cavity enter the evaporator. The evaporator converts this part of the gas-liquid mixture into high-temperature and low-pressure gaseous steam and sends it into the compressor. Part of the steam condenses and is sent into the condensate water tank through the condensate water pipe (this part of the condensed water is clean water and can be reused). The water in the condensate water tank is used by the cleaning member for spraying and cleaning impurities such as salt crystals adhered to the inner wall of the separation cavity; the heated and concentrated wastewater is pumped out through the discharge pipe and sent into the centrifuge. The centrifuge separates the solid and liquid. The liquid enters the liquid storage tank for storage and can then be recycled with the wastewater for crystallization again. The solid is output through the solid material outlet and forms salt crystals after drying for external transportation.

[0018] Furthermore, the heat exchange cavity includes a contact chamber and a storage chamber which are integrally arranged. The diameter of the contact chamber is larger than that of the storage chamber and is arranged above the storage chamber. The side wall of the contact chamber is connected to the compressor through a steam outlet pipe. The two ends of the heat exchanger are rotatably installed in the contact chamber. The heat exchanger includes a slow flow plate, a plurality of heat exchange tubes and mounting plates at both ends of the heat exchange tubes. The slow flow plate is fixed in the middle of the upper mounting plate. The heat exchange tubes are arranged in a circumferential array and are arranged between the two mounting plates. Flow ports corresponding to the heat exchange tubes are arranged through the mounting plates.

[0019] By adopting the above technical solution, heat exchange is realized by the contact between the steam and the side wall of the heat exchange tube at the contact chamber, so as to heat the wastewater. The participating steam and the heated wastewater fall into the storage chamber and enter the separation cavity through the feeding pipe. Then, the separation cavity realizes the continuous circulation of heating and evaporation of the wastewater through the circulation member until the concentration of the wastewater reaches the standard and then discharges the material through the discharging member; the wastewater flows in from the top of the contact chamber. The incoming wastewater first pours on the slow flow plate and then evenly slows down and enters the plurality of heat exchange tubes. The slow flow plate bears the impact of the water inlet and evenly distributes the wastewater, ensuring that the subsequent wastewater enters the heat exchange tubes evenly and stably.

[0020] Furthermore, the scale reduction component includes a scale reduction drive and a scale reduction fixation. The scale reduction drive includes a drive gear disk arranged below the top mounting disk, a drive gear meshing with the drive gear disk, and a drive motor for controlling the rotation of the drive gear. The drive gear is sleeved on the output shaft of the drive motor. The axis of the drive gear is perpendicular to the axis of the drive gear disk and is arranged below the mounting disk above. The scale reduction fixation includes a plurality of abutting columns and a plurality of abutting springs. The abutting columns and the abutting springs are arranged correspondingly. The abutting columns are arranged in a circumferential array on the outside of the mounting disk and are arranged along the radial direction of the mounting disk. A ball is arranged at the contact position between the abutting column and the mounting disk. One end of the abutting spring is connected to the abutting column, and the other end is fixed in the heat exchange cavity.

[0021] By adopting the above technical solution, the drive motor controls the rotation of the drive gear to drive the rotation of the drive gear disk, thereby controlling the rotation of the mounting disk fixed to the drive gear disk and simultaneously driving the rotation of the mounting disk below. Since the mounting disk is installed through scale reduction fixation around, when the mounting disk drives the heat exchange tube to rotate, the abutting spring is squeezed. The abutting spring generates a reaction force to make the mounting disk vibrate slightly. Therefore, the centrifugal force generated by the rotation of the mounting disk and the reaction force vibration brought by the abutting spring reduce the adhesion of salt crystals on the inner wall of the heat exchange tube, thereby avoiding the generation of water scale and prolonging the service life of the heat exchange tube.

[0022] In summary, the technical solution of the present utility model has the following advantages:

[0023] 1. For the optical fiber production wastewater treatment system provided by the present utility model, the salt-containing wastewater from optical fiber production first enters the pretreatment unit for sedimentation treatment and adjustment treatment. After coagulation sedimentation in the sedimentation device, it then enters the adjustment device to adjust the pH value to neutral, and then is transported to the evaporation unit. The treated salt-containing wastewater enters the evaporation unit and is evaporated and separated into solid salt and clean condensed water. The condensed water can be recycled, and the solid salt is output after drying.

[0024] 2. For the optical fiber production wastewater treatment system provided by the present utility model, the wastewater after sedimentation treatment enters the conditioning tank to adjust the pH value, wastewater volume, water quality, etc. A chemical addition pipe is set for chemical addition to treat the wastewater, preventing the wastewater from changing too much over time and affecting the treatment of subsequent equipment. At the same time, the conditioning tank cooperates with the scum cleaning device to reduce the subsequent operation load, avoid blockage of subsequent pipeline equipment caused by substances such as colloids, and ensure the stability of the wastewater treatment process.

[0025] 3. For the optical fiber production wastewater treatment system provided by the present utility model, the water in the condensate tank is used by the cleaning component for spraying and cleaning impurities such as salt crystals adhered to the inner wall of the separation cavity; the scale reduction component reduces the adhesion of salt crystals on the inner wall of the heat exchange tube through the centrifugal force generated by the rotation of the mounting disk and the reaction force vibration brought by the abutting spring, thereby avoiding the generation of water scale and prolonging the service life of the heat exchange tube. Brief Description of the Drawings

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic diagram of the overall structure of a fiber optic production wastewater treatment system provided in an embodiment of the present invention;

[0028] Figure 2 It is a cross-sectional view of a fiber optic production wastewater treatment system provided in an embodiment of the present invention;

[0029] Figure 3 For Figure 2 It is an enlarged schematic diagram of part A shown;

[0030] Figure 4 It is a partial structural schematic diagram of an evaporation unit provided in an embodiment of the present invention;

[0031] Figure 5 It is a schematic diagram of the principle of a fiber optic production wastewater treatment system provided in an embodiment of the present invention.

[0032] Description of the reference numerals:

[0033] 1. Pretreatment unit; 2. Precipitation device; 21. Precipitation tank body; 211. Wastewater inlet pipe; 212. Wastewater outlet; 213. Coagulant aid inlet pipe; 22. Precipitation partition; 23. Adjustment pipe; 3. Adjustment device; 31. Conditioning tank; 311. Stirring member; 312. Delivery port; 313. Coarse filter member; 314. Slag collection tank; 315. Filter partition; 32. Chemical addition pipe; 33. Scum cleaning device; 331. Cleaning scraper; 332. Cleaning drive; 4. Evaporation unit; 5. Separation chamber; 51. Separation cavity; 52. Cleaning member; 521. Spray ring pipe; 522. Spray port; 6. Heat exchange chamber; 61. Heat exchange cavity; 611. Contact chamber; 612. Storage chamber; 62. Heat exchanger; 621. Slow flow plate; 622. Heat exchange pipe; 623. Installation plate; 6231. Flow port; 624. Scale reduction member; 6241. Scale reduction drive; 62411. Driving gear disc; 62412. Driving gear; 62413. Driving motor; 6242. Scale reduction fixing; 62421. Tightening column; 62422. Tightening spring; 62423. Ball; 7. Compressor; 8. Circulation member; 81. Circulation pipe; 82. Circulation pump; 9. Discharging member; 91. Centrifuge; 911. Liquid pipe; 912. Solid material outlet; 92. Liquid storage tank; 10. Delivery pipe; 101. Feed pump; 11. Feeding pipe; 12. Steam inlet pipe; 13. Evaporator; 14. Condensation water tank; 141. Condensation water pipe; 15. Discharge pipe; 151. Discharge pump; 16. Steam outlet pipe. Detailed implementation manners

[0034] The following further elaborates on the present utility model in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0035] A fiber production wastewater treatment system, as Figure 1 and Figure 2 shown, includes a pretreatment unit 1 and an evaporation unit 4. The pretreatment unit 1 and the evaporation unit 4 are connected by a delivery pipe 10. A feed pump 101 is provided on the delivery pipe 10. The pretreatment unit 1 includes a precipitation device 2 and an adjustment device 3. The precipitation device 2 and the adjustment device 3 are arranged in parallel and connected by an adjustment pipe 23.

[0036] The evaporation unit 4 includes a separation chamber 5, a heat exchange chamber 6, a compressor 7, a circulation component 8, and a discharging component 9. The conveying pipe 10 is connected to the middle of one side of the separation chamber 5. The separation chamber 5 and the heat exchange chamber 6 are arranged in parallel and connected by a feeding pipe 11. The separation chamber 5 and the heat exchange chamber 6 are also connected by the circulation component 8. The top of the separation chamber 5 is connected to the compressor 7, and the compressor 7 is also connected to the side near the top of the heat exchange chamber 6. The bottom of the separation chamber 5 is also connected to the discharging component 9. The separation chamber 5 includes a separation cavity 51 and a cleaning component 52. The cleaning component 52 is arranged at the inner top of the separation cavity 51. The heat exchange chamber 6 includes a heat exchange cavity 61, a heat exchanger 62, and an anti-scaling component 624. The heat exchanger 62 is arranged at the side near the top in the heat exchange cavity 61. The anti-scaling component 624 is arranged at the upper and lower ends of the heat exchanger 62 and controls the rotation of the heat exchanger 62.

[0037] The salt-containing wastewater from optical fiber production first enters the pretreatment unit 1 for sedimentation treatment and adjustment treatment. After coagulation sedimentation in the sedimentation device 2, it enters the adjustment device 3 to adjust the pH value to neutral, and then is transported to the evaporation unit 4. After being treated, the salt-containing wastewater enters the evaporation unit 4 and is evaporated and separated into solid salt and clean condensed water. The condensed water can be recycled, while the solid salt is dried and output. In the evaporation unit 4, the wastewater first enters the separation chamber 5, enters the heat exchange chamber 6 through the circulation component 8 connected to the separation chamber 5 for heating, and then the wastewater and solid materials are evaporated and separated in the separation chamber 5. The circulation pump 82 enables the wastewater to continuously circulate and heat between the heat exchange chamber 6 and the separation chamber 5 for evaporation. When the concentration of the wastewater reaches a certain level, the discharging component 9 pumps out the wastewater and centrifugally separates it. During the continuous heating and evaporation cycle, the steam at the inner top of the separation chamber 5 can be reused and sent into the heat exchange chamber 6 to reduce the treatment energy consumption and save energy.

[0038] Such as Figure 1 And Figure 2As shown in the figure, the precipitation device 2 includes a precipitation tank body 21 and a plurality of precipitation partition plates 22 with through holes. The precipitation partition plates 22 are inclined and arranged in a staggered manner up and down. The height of each precipitation partition plate 22 on the side close to the center of the precipitation tank body 21 is lower than the height on the side close to the side wall of the precipitation tank body 21. On the left and right side walls of the precipitation tank body 21, a wastewater inlet pipe 211 and a wastewater outlet 212 are respectively arranged. The wastewater inlet pipe 211 is arranged above the wastewater outlet 212. The wastewater inlet pipe 211 is located in the upper left side, and the wastewater outlet 212 is located in the lower right side. The wastewater outlet 212 is connected to and communicates with the adjustment pipe 23 and the adjustment device 3. A coagulant aid inlet pipe 213 is arranged near the top on the side of the precipitation tank body 21 far from the wastewater inlet pipe 211, that is, the coagulant aid inlet pipe 213 is arranged on the upper right side above the precipitation tank body 21. Wastewater enters the precipitation tank body 21 through the wastewater inlet pipe 211 and impacts and contacts the precipitation partition plates 22. On the one hand, the precipitation partition plates 22 achieve the diversion of wastewater and reduce the setting of additional stirring devices. On the other hand, the wastewater impacts the precipitation partition plates 22, so that the colloids in the wastewater are destabilized and collided to achieve a better coagulant aid effect. The coagulant aid also enters the precipitation tank along the precipitation partition plates 22, thereby increasing the contact time and contact area between the wastewater and the coagulant aid, improving the subsequent precipitation effect, facilitating the removal of most of the colloids in the wastewater, and also facilitating subsequent adjustment treatment.

[0039] As Figure 1 and Figure 2 shown in the figure, the adjustment device 3 includes a conditioning tank 31 and a chemical addition pipe 32. One end of the adjustment pipe 23 far from the wastewater outlet 212 is connected to the upper side of one side of the conditioning tank 31. The chemical addition pipe 32 is arranged above the other side of the conditioning tank 31 far from the adjustment pipe 23. The chemical addition pipe 32 extends into the conditioning tank 31. A plurality of stirring members 311 are arranged in the conditioning tank 31. The axes of the stirring members 311 are arranged along the width direction of the conditioning tank 31. A delivery port 312 connected to the delivery pipe 10 is arranged at the bottom of the side of the conditioning tank 31 far from the adjustment pipe 23. A coarse filter member 313 is arranged on the delivery port 312. The wastewater after precipitation treatment enters the conditioning tank 31 again to adjust the pH value, wastewater volume, water quality, etc. The chemical addition pipe 32 is set to add chemicals to treat the wastewater, prevent the wastewater from changing too much over time and affecting the treatment of subsequent equipment. At the same time, the treatment by the conditioning tank 31 can reduce the subsequent operation load, avoid the blockage of subsequent pipeline equipment caused by substances such as colloids, and ensure the stability of the wastewater treatment process.

[0040] The adjustment device 3 further includes a scum cleaning device 33. The scum cleaning device 33 includes a cleaning scraper 331 and a cleaning drive 332. The cleaning scraper 331 is arranged along the length direction of the conditioning tank 31, and the cleaning drive 332 controls the cleaning scraper 331 to move along the width direction of the conditioning tank 31. A slag collection tank 314 is also arranged along the length direction of the conditioning tank 31 on the front side outside the conditioning tank 31. The bottom of the slag collection tank 314 is communicated with the conditioning tank 31 and is provided with a filtering partition net 315. Most of the colloids in the wastewater precipitate and flocculate in the precipitation tank body 21, but some still enter the conditioning tank 31. Therefore, a scum cleaning device 33 is arranged on the conditioning tank 31. The cleaning scraper 331 scrapes the surface scum and collects it into the slag collection tank 314. The slag collection tank 314 is communicated with the conditioning tank 31 through the filtering partition net 315, so as to achieve the purpose of separating impurities without affecting the wastewater treatment.

[0041] As Figure 1 , Figure 4 and Figure 5 shown, two feed pipes 11 with parallel axes are arranged on the side of the separation cavity 51 far from the conveying pipe 10. The circulation part 8 includes a circulation pipe 81 and a circulation pump 82. The circulation pump 82 is arranged on the circulation pipe 81. One end of the circulation pipe 81 is connected to the rear side wall of the separation cavity 51 near the bottom, and the other end is connected to the center of the top of the heat exchange cavity 61. The top of the separation chamber 5 is connected to the compressor 7 through a steam inlet pipe 12. The bottom of the separation cavity 51 is in a conical shape with gradually decreasing diameters, and the center of the bottom is connected to the discharging part 9 through a discharging pipe 15. A discharging pump 151 is arranged on the discharging pipe 15. An evaporator 13 is also arranged on the steam inlet pipe 12. The evaporator 13 is also connected to a condensate water tank 14 through a pipeline. The condensate water tank 14 is connected to the cleaning part 52 through a condensate water pipe 141. The discharging part 9 includes a centrifuge 91 and a liquid storage tank 92. The other end of the discharging pipe 15 is connected to the centrifuge 91. A liquid pipe 911 is arranged on the centrifuge 91 and is connected to the liquid storage tank 92. A solid material outlet 912 is also arranged on the centrifuge 91.

[0042] The wastewater enters the separation cavity 51. The circulation pipe 81 is forced by the circulation pump 82 to be sent into the heat exchange cavity 61 for heating, and then enters the separation cavity 51 through the feed pipe 11 for gas-liquid separation, so as to continuously heat and concentrate the wastewater. Until the concentration of the wastewater reaches a certain requirement, it is forced to be pumped by the discharging pump 151 and processed through the discharging pipe 15. The heated and concentrated wastewater is pumped out through the discharging pipe 15 and sent into the centrifuge 91. The centrifuge 91 separates the solid and liquid. The liquid enters the liquid storage tank 92 for storage and can then be recycled with the wastewater for crystallization again. The solid is output through the solid material outlet 912 and forms salt crystals after drying for external transportation.

[0043] As Figure 2As shown, the cleaning member 52 includes a spray header pipe 521 and a plurality of spray nozzles 522. The spray header pipe 521 is arranged along the inner diameter of the separation cavity 51 and is connected to the condensate water pipe 141. The spray header pipe 521 is arranged at the inner top of the separation cavity 51, and the spray nozzles 522 are opened at the bottom of the spray header pipe 521. The steam inlet pipe 12 brings the steam and part of the liquid above the separation cavity 51 into the evaporator 13. The evaporator 13 converts this part of the gas-liquid mixture into high-temperature and low-pressure gaseous steam and sends it into the compressor 7. Part of the steam condenses and is sent into the condensate water tank 14 through the condensate water pipe 141 (this part of the condensate water is clean water and can be reused). The water in the condensate water tank 14 is used by the cleaning member 52 for spraying and cleaning impurities such as salt crystals adhered to the inner wall of the separation cavity 51.

[0044] As Figure 2 , Figure 3 and Figure 4 shown, the heat exchange cavity 61 includes a contact chamber 611 and a storage chamber 612 which are integrally arranged. The diameter of the contact chamber 611 is larger than that of the storage chamber 612 and is arranged above the storage chamber 612. The side wall of the contact chamber 611 is connected to the compressor 7 through the steam outlet pipe 16. The two ends of the heat exchanger 62 are positioned and rotatably installed in the contact chamber 611. At the contact chamber 611, the steam contacts the side wall of the heat exchange tube 622 to achieve heat exchange, thereby heating the wastewater. The participating steam and the heated wastewater fall into the storage chamber 612 and enter the separation cavity 51 through the feed pipe 11. Then, the separation cavity 51 realizes continuous circulation of wastewater heating and evaporation through the circulation member 8 until the wastewater concentration reaches the standard and then discharges through the discharging member 9.

[0045] The heat exchanger 62 includes a flow buffer plate 621, a plurality of heat exchange tubes 622, and mounting plates 623 at the upper and lower ends of the heat exchange tubes 622. The flow buffer plate 621 is fixed in the middle of the upper mounting plate 623. The heat exchange tubes 622 are arranged in a circumferential array and are arranged between the two mounting plates 623. Corresponding to the heat exchange tubes 622 on the mounting plates 623, flow ports 6231 are penetrated. The mounting plates 623 are fixed at the upper and lower ends of the heat exchange tubes 622 and move as a whole. The wastewater flows in from the top of the contact chamber 611. The incoming wastewater first pours onto the flow buffer plate 621 and then evenly distributes and slows down into the plurality of heat exchange tubes 622. The flow buffer plate 621 bears the impact of the water inlet and evenly distributes and slows down the wastewater to ensure that the subsequent wastewater enters the heat exchange tubes 622 evenly and stably.

[0046] As Figure 2 and Figure 3As shown, the scale reduction member 624 includes a scale reduction drive 6241 and a scale reduction fixer 6242. The scale reduction drive 6241 includes a drive gear disk 62411 disposed below the top mounting disk 623, a drive gear 62412 meshing with the drive gear disk 62411, and a drive motor 62413 controlling the rotation of the drive gear 62412. The drive gear disk 62411 is coaxially disposed with the mounting disk 623. The drive gear 62412 is sleeved on the output shaft of the drive motor 62413. The axis of the drive gear 62412 is perpendicular to the axis of the drive gear disk 62411 and is disposed below the upper mounting disk 623. The axis of the drive gear disk 62411 is vertical, and the axis of the drive gear 62412 is horizontal.

[0047] The scale reduction fixer 6242 includes a plurality of abutting columns 62421 and a plurality of abutting springs 62422. The abutting columns 62421 and the abutting springs 62422 are correspondingly arranged. The abutting columns 62421 are arranged in a circumferential array on the outside of the mounting disk 623 and are arranged along the radial direction of the mounting disk 623. A ball 62423 is provided at the contact position between the abutting column 62421 and the mounting disk 623. One end of the abutting spring 62422 is connected to the abutting column 62421, and the other end is fixed in the heat exchange cavity 61.

[0048] The drive motor 62413 controls the rotation of the drive gear 62412 to drive the rotation of the drive gear disk 62411, thereby controlling the rotation of the mounting disk 623 fixed to the drive gear disk 62411 and simultaneously driving the rotation of the lower mounting disk 623. Since the mounting disk 623 is installed through the scale reduction fixer 6242 around its circumference, when the mounting disk 623 drives the heat exchange tube 622 to rotate, the abutting spring 62422 is compressed. The abutting spring 62422 generates a reaction force to cause the mounting disk 623 to vibrate slightly. Therefore, the centrifugal force generated by the rotation of the mounting disk 623 and the reaction force brought by the abutting spring 62422 cause vibration, reducing the adhesion of salt crystals on the inner wall of the heat exchange tube 622, thereby avoiding the generation of water scale and extending the service life of the heat exchange tube 622.

[0049] Working principle and usage method of this optical fiber production wastewater treatment system: The saline wastewater from optical fiber production first enters the pretreatment unit 1 for sedimentation treatment and adjustment treatment. The wastewater enters the sedimentation tank body 21 through the wastewater inlet pipe 211 and impacts and contacts the sedimentation partition plate 22. After coagulation sedimentation in the sedimentation tank body 21, the upper-layer wastewater is sent to the adjustment device 3 through the adjustment pipe 23 to adjust the pH value to neutral. A scum cleaning device 33 is provided on the conditioning tank 31. The cleaning scraper 331 scrapes the surface scum and collects it into the slag collection tank 314. The wastewater after sedimentation and adjustment treatment is transported to the evaporation unit 4. The wastewater enters the separation cavity 51. The circulating pipe 81 is sent into the heat exchange cavity 61 under the forced action of the circulating pump 82 for heating, and then enters the separation cavity 51 through the feeding pipe 11 for gas-liquid separation, realizing continuous heating and concentration of the wastewater. Until the wastewater concentration reaches certain requirements, it is forced to be pumped by the discharge pump 151 and processed through the discharge pipe 15; when the wastewater is in the heat exchange cavity 61, the centrifugal force generated by the rotation of the mounting disc 623 and the reaction force vibration brought by the abutting spring 62422 can reduce the adhesion of salt crystals on the inner wall of the heat exchange pipe 622; the condensate water tank 14 connected to the evaporator 13 can use the purified water to wash the inner wall of the separator, reducing the adhesion of salt crystals and the like inside the separator.

[0050] The above description shows and describes the preferred embodiments of the present invention. As mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the inventive concept described herein through the above teachings or the technology or knowledge in related fields. And the changes and alterations made by those skilled in the art that do not depart from the spirit and scope of the present invention should all be within the protection scope of the appended claims of the present invention.

Claims

1. An optical fiber production wastewater treatment system, characterized in that: The invention comprises a pre-treatment unit (1) and an evaporation unit (4), wherein the pre-treatment unit (1) and the evaporation unit (4) are connected via a delivery pipe (10), wherein a feed pump (101) is arranged on the delivery pipe (10), wherein the pre-treatment unit (1) comprises a precipitation device (2) and an adjustment device (3), wherein the precipitation device (2) and the adjustment device (3) are arranged in parallel and connected via an adjustment pipe (23), wherein the evaporation unit (4) comprises a separation chamber (5), a heat exchange chamber (6), a compressor (7), a circulation component (8) and a discharge component (9), wherein the delivery pipe (10) is connected to the middle part of one side of the separation chamber (5), wherein the separation chamber (5) and the heat exchange chamber (6) are arranged in parallel and connected via a delivery pipe (11), wherein the separation chamber (5) ) is also connected to the heat exchange chamber (6) through a circulation member (8); the top of the separation chamber (5) is connected to the compressor (7); the compressor (7) is also connected to the side of the heat exchange chamber (6) near the top; the bottom of the separation chamber (5) is also connected to a discharge member (9); the separation chamber (5) comprises a separation chamber (51) and a cleaning member (52); the cleaning member (52) is arranged at the top of the separation chamber (51); the heat exchange chamber (6) comprises a heat exchange chamber (61), a heat exchanger (62) and a scale reduction member (624); the heat exchanger (62) is arranged at the side of the heat exchange chamber (61) near the top; the scale reduction member (624) is arranged at both ends of the top and bottom of the heat exchanger (62) and controls the rotation of the heat exchanger (62).

2. The optical fiber production wastewater treatment system according to claim 1, characterized in that: The sedimentation device (2) comprises a sedimentation tank body (21) and a plurality of sedimentation baffles (22) with through holes, wherein the sedimentation baffles (22) are arranged in an inclined and staggered manner, and the height of each sedimentation baffle (22) close to the center of the sedimentation tank body (21) is lower than the height of the sedimentation baffle (22) close to the side wall of the sedimentation tank body (21). The side walls of both sides of the sedimentation tank body (21) are provided with a wastewater inlet pipe (211) and a wastewater outlet (212), wherein the wastewater inlet pipe (211) is arranged above the wastewater outlet (212), and the wastewater outlet (212) is connected to an adjustment pipe (23) and communicated with the adjustment device (3), and a coagulation-aiding inlet pipe (213) is arranged on the sedimentation tank body (21) near the top on the side away from the wastewater inlet pipe (211).

3. The optical fiber production wastewater treatment system according to claim 2, characterized in that: The adjustment device (3) comprises a conditioning tank (31) and a dosing pipe (32); one end of the conditioning tank (23) away from the wastewater outlet (212) is connected to the upper side of the conditioning tank (31); the dosing pipe (32) is arranged above the other side of the conditioning tank (31) away from the adjustment pipe (23); the dosing pipe (32) extends into the conditioning tank (31); a plurality of stirring members (311) are arranged in the conditioning tank (31); the axes of the stirring members (311) are arranged along the width direction of the conditioning tank (31); a delivery port (312) connected to the delivery pipe (10) is arranged at the bottom of the side of the conditioning tank (31) away from the adjustment pipe (23); a coarse filter mesh member (313) is arranged on the delivery port (312).

4. The optical fiber production wastewater treatment system according to claim 3, characterized in that: The adjustment device (3) further comprises a scum cleaning device (33), the scum cleaning device (33) comprising a cleaning scraper (331) and a cleaning drive (332), the cleaning scraper (331) being arranged along the length direction of the quenching and tempering tank (31), the cleaning drive (332) controlling the cleaning scraper (331) to move along the width direction of the quenching and tempering tank (31), a scum collecting groove (314) being arranged on the outer front side of the quenching and tempering tank (31) along the length direction of the quenching and tempering tank (31), the bottom of the scum collecting groove (314) being connected to the quenching and tempering tank (31) and being provided with a filter screen (315).

5. The optical fiber production wastewater treatment system according to claim 1, characterized in that: Two feeding pipes (11) with parallel axes are arranged on the side of the separation chamber (51) away from the conveying pipe (10); the circulation member (8) comprises a circulation pipe (81) and a circulation pump (82); the circulation pump (82) is arranged on the circulation pipe (81); one end of the circulation pipe (81) is connected to the rear side wall of the separation chamber (51) near the bottom, and the other end is connected to the top center of the heat exchange chamber (61); the top of the separation chamber (5) is connected to the compressor (7) through the steam inlet pipe (12); the bottom of the separation chamber (51) is in a conical shape with a decreasing diameter, and the center of the bottom is connected to the discharge member (9) through a discharge pipe (15); and the discharge pipe (15) is provided with a discharge pump (151).

6. The optical fiber production wastewater treatment system according to claim 5, characterized in that: The steam inlet pipe (12) is also provided with an evaporator (13), and the evaporator (13) is also connected to a condensate tank (14) through a pipeline. The condensate tank (14) is connected to a cleaning component (52) through a condensate pipe (141). The cleaning component (52) comprises a spray ring pipe (521) and a plurality of spray ports (522). The spray ring pipe (521) is arranged along the inner diameter of the separation chamber (51) and is connected to the condensate pipe (141). The spray ports (522) are provided at the bottom of the spray ring pipe (521). The discharge component (9) comprises a centrifuge (91) and a liquid storage tank (92). The other end of the discharge pipe (15) is connected to the centrifuge (91). The centrifuge (91) is provided with a liquid pipe (911) connected to the liquid storage tank (92). The centrifuge (91) is also provided with a solid material outlet (912).

7. The optical fiber production wastewater treatment system according to claim 5, characterized in that: The heat exchange cavity (61) comprises an integrally arranged contact chamber (611) and a storage chamber (612); the diameter of the contact chamber (611) is larger than the diameter of the storage chamber (612) and the contact chamber (611) is arranged above the storage chamber (612); the side wall of the contact chamber (611) is connected to the compressor (7) via a steam outlet pipe (16); both ends of the heat exchanger (62) are positioned and rotatably installed in the contact chamber (611); the heat exchanger (62) comprises a slow flow plate (621), a plurality of heat exchange tubes (622) and mounting plates (623) at both ends of the heat exchange tubes (622); the slow flow plate (621) is fixed at the middle of the upper mounting plate (623); the heat exchange tubes (622) are arranged in a circular array and are arranged between two mounting plates (623); and a flow port (6231) is provided on the mounting plate (623) corresponding to the heat exchange tubes (622).

8. The optical fiber production wastewater treatment system according to claim 7, characterized in that: The scale reduction member (624) includes a scale reduction drive (6241) and a scale reduction fixture (6242). The scale reduction drive (6241) includes a driving toothed disc (62411) arranged below the top mounting disc (623), a driving gear (62412) meshing with the driving toothed disc (62411), and a driving motor (62413) controlling the rotation of the driving gear (62412). The driving gear (62412) is sleeved on the output shaft of the driving motor (62413). The axis of the driving gear (62412) is perpendicular to the axis of the driving toothed disc (62411) and is arranged above the mounting disc (623). Below the disk (623), the scale reduction fixer (6242) includes a plurality of clamping columns (62421) and a plurality of clamping springs (62422), the clamping columns (62421) and the clamping springs (62422) being arranged correspondingly, the clamping columns (62421) being arranged in a circular array on the outside of the mounting disk (623) and radially along the mounting disk (623), a ball (62423) being arranged at the contact point between the clamping columns (62421) and the mounting disk (623), one end of the clamping spring (62422) being connected to the clamping column (62421), and the other end being fixed in the heat exchange cavity (61).

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