A high-efficiency recovery treatment device for low-concentration sulfur-containing waste liquid and a recovery method thereof

Abstract

The application discloses a kind of low-concentration sulfur-containing waste liquid efficient recovery processing device and recovery method thereof, including base, the middle position of the upper end of the base is provided with biological box, one side of the upper end of the base is provided with pretreatment tank, the other side of the upper end of the base is provided with oxidation tank, the lower side of the front end of the biological box is provided with rotating door, further including first processing cavity, which is opened in the upper end of the pretreatment tank inside, the lower end of the pretreatment tank inside is opened with second processing cavity, the first processing cavity and second processing cavity are connected by electric valve and are communicated, the second processing cavity is communicated with biological box, the two sides of the first processing cavity are provided with ultrasonic transducer.The low-concentration sulfur-containing waste liquid efficient recovery processing device can effectively reduce the impurity content of suspended solids, colloidal particles and the like in waste liquid, without additional device for recovery treatment, realizes the efficient oxidation treatment to waste liquid.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of low-concentration sulfur-containing waste liquid treatment, in particular to a high-efficiency recovery treatment device for low-concentration sulfur-containing waste liquid and a recovery method thereof. BACKGROUND

[0002] Low-concentration sulfur-containing waste liquid refers to waste water containing low-concentration sulfides. These sulfides may come from various industrial processes, such as petroleum refining, chemical production, metal smelting, etc. The sulfide content in these waste liquids is relatively low, but still has certain environmental risks. If directly discharged into the natural environment, it may cause pollution to water bodies, soil and atmosphere. Therefore, the treatment and recovery of low-concentration sulfur-containing waste liquid is particularly important. Although the sulfides in low-concentration sulfur-containing waste liquid have low concentration, their cumulative effect may still cause long-term harm to the ecological environment if not recovered and treated. In addition, the sulfides in waste liquid have certain resource value. Through recovery and treatment, resource reuse can be realized, production costs can be reduced, economic benefits can be improved, and environmental pollution risks can be reduced, which is in line with the concept of sustainable development.

[0003] For example, the Chinese authorized patent with publication number CN211635402U, "Sulfur-containing waste liquid drying pretreatment filter device", includes a filter box body, a liquid inlet pipe, a liquid outlet pipe, a filter separation plate, a cleaning and scraping assembly, and a switch assembly are arranged on the filter box body. The liquid inlet pipe is arranged at the top of the filter box body, the liquid outlet pipe is arranged at the bottom of the filter box body, the filter separation plate is arranged inside the filter box body, the filter separation plate is fixedly connected with the inner side wall of the filter box body, the cleaning and scraping assembly is arranged at the top of the filter box body, a cleaning port is arranged on the filter box body beside the filter separation plate, and the switch assembly is arranged on the cleaning port.

[0004] The above-mentioned prior art solves the problem that impurities and liquid are left on the inner wall of the cylinder containing waste liquid during the pretreatment and filtration of sulfur-containing waste liquid, which is not only inconvenient to clean, but also easy to cause material waste. However, the pretreatment and filtration of the treatment device is only carried out by the filter plate, and the filtration effect is not ideal. At the same time, the device only carries out pretreatment and filtration, and lacks effective treatment for the recovery of low-concentration sulfur-containing waste liquid, which still needs to be treated by an additional device, affecting the convenience of treatment. Therefore, it does not meet the existing needs. Therefore, we propose a high-efficiency recovery treatment device for low-concentration sulfur-containing waste liquid and a recovery method thereof. SUMMARY

[0005] The present application aims to provide a high-efficiency recovery treatment device for low-concentration sulfur-containing waste liquid and a recovery method thereof, to solve the problems of unsatisfactory filtration effect of the recovery treatment device for pretreatment and lack of effective subsequent treatment after pretreatment affecting the convenience of treatment as mentioned in the background.

[0006] To achieve the above object, the application provides the following technical scheme: a low-concentration sulfur-containing waste liquid high-efficiency recovery treatment device, comprising a base, a biological box is arranged at the middle position of the upper end of the base, a pretreatment box is arranged on one side of the upper end of the base, an oxidation box is arranged on the other side of the upper end of the base, and a rotating door is arranged on the lower side of the front end of the biological box;

[0007] It also comprises a first treatment cavity which is arranged at the upper end inside the pretreatment box, a second treatment cavity which is arranged at the lower end inside the pretreatment box, an electric valve which is arranged between the first treatment cavity and the second treatment cavity, the second treatment cavity which is connected with the biological box, ultrasonic transducers which are arranged on the two sides of the first treatment cavity, metal vibrating plates which are arranged on the two sides inside the first treatment cavity and are fixedly sealed with the first treatment cavity, and a filter plate which is slidably arranged on the upper side inside the second treatment cavity.

[0008] It also comprises a rotating disc which is arranged on the lower side inside the oxidation box, a plurality of nozzles which are arranged on the upper end of the rotating disc, a transmission cavity which is arranged on the upper side inside the oxidation box, a hollow pipe which is rotatably arranged on one side of the upper end inside the transmission cavity, the hollow pipe which is connected with the rotating disc, and nozzles which are installed on the two sides directly above the rotating disc.

[0009] Preferably, an ultrasonic generator is installed on the outer side of the ultrasonic transducer, the output end of the ultrasonic generator is electrically connected with the input end of the ultrasonic transducer, and control panels are installed on the two sides of the upper end of the front end of the pretreatment box.

[0010] Preferably, four supporting blocks are arranged below the filter plate, the supporting blocks are fixedly welded with the second treatment cavity, and the supporting blocks and the filter plate are connected through return springs.

[0011] Preferably, two first motors are installed on the lower side of one side of the base, rotating rods are arranged on the front and back sides directly below the filter plate and are rotatably connected with the second treatment cavity, the output ends of the first motors are drivingly connected with the rotating rods through couplings, and three protrusions which are equidistantly distributed are welded on the outer wall of the rotating rod.

[0012] Preferably, two electric telescopic rods are installed on the two sides of the biological box, a top cover is arranged directly above the biological box and is connected with the output end of the electric telescopic rod, a lifting frame is arranged below the top cover, a plurality of through holes which are arranged in a rectangular array are arranged on the outer wall of the lifting frame, and four biological purifiers are arranged on the upper end of the lifting frame.

[0013] Preferably, a water pump is arranged on one side of the upper end inside the oxidation box, and the water pump is connected with the biological box and the nozzles through connecting pipes.

[0014] Preferably, one side of the upper end of the transmission cavity is provided with a second motor, the output end of the second motor is provided with a rotating shaft through a shaft coupling, and one end of the rotating shaft is rotationally connected with the transmission cavity.

[0015] Preferably, the outer wall of the rotating shaft and the outer wall of the hollow tube at the inner end of the transmission cavity are both provided with transmission gears, and the transmission gears are meshingly connected.

[0016] Preferably, one side of the upper end of the oxidation box is provided with a storage box, one end of the storage box is provided with a liquid adding pipe, one end of the liquid adding pipe extends into the interior of the hollow tube, a bearing is arranged on the outer wall of the hollow tube at one end of the liquid adding pipe, the inner wall of the bearing is connected with the outer wall of the liquid adding pipe, and the outer wall of the bearing is connected with the inner wall of the hollow tube.

[0017] The recovery method of the high-efficiency recovery treatment device for low-concentration sulfur-containing waste liquid comprises the following steps:

[0018] Step one: the low-concentration sulfur-containing waste liquid is added into the interior of the first treatment cavity through the upper end feeding port of the pretreatment box, the ultrasonic generator is started through the control panel, the ultrasonic generator generates ultrasonic waves, the metal vibrating piece vibrates at a high frequency after the ultrasonic generator receives the ultrasonic waves, the micro displacement and acceleration generated on the surface of the metal vibrating piece when it vibrates at a high frequency in the low-concentration sulfur-containing waste liquid will drive the surrounding waste liquid molecules to vibrate, forming a strong sound field, which can destroy the surface structure of the impurity particles in the low-concentration sulfur-containing waste liquid and promote the coalescence and settlement between the impurities;

[0019] Step two: after the low-concentration sulfur-containing waste liquid is preliminarily treated, the electric valve is started to make the low-concentration sulfur-containing waste liquid enter the interior of the second treatment cavity, the filter plate filters the low-concentration sulfur-containing waste liquid, the first motor is started, the first motor drives the rotating rod to rotate through the shaft coupling, the rotating rod drives the protruding block to rotate, the protruding end of the protruding block pushes the filter plate to move upwards, the return spring is stretched, the protruding end of the protruding block rotates to the lower side to release the pushing of the filter plate, the elastic restoring force of the return spring drives the filter plate to move downwards, and the movement of the filter plate avoids the blockage of the impurities during the filtration;

[0020] Step three: the pretreated low-concentration sulfur-containing waste liquid enters the interior of the biological box, the low-concentration sulfur-containing waste liquid reacts with the microorganism flora and biological carrier material filled in the biological purifier, the sulfide in the waste liquid is oxidized into sulfate ions, the content of sulfur in the waste liquid is reduced, the electric telescopic rod is started to make the top cover move upwards, the top cover drives the lifting frame to move upwards synchronously, the biological purifier moves to the outside of the biological box, and the biological purifier is replaced;

[0021] Step four: start the water pump, through the connecting pipe to make the low concentration of sulfur-containing waste liquid into the nozzle and spray out, the storage tank through the liquid pipe to make the oxidant into the inside of the hollow pipe, start the second motor, through the shaft to make the rotating shaft rotate, the rotating shaft will start the transmission gear to rotate, under the meshing transmission of the transmission gear, another transmission gear drives the hollow pipe to rotate, the bearing ensures the relative rotation of the hollow pipe and the liquid pipe, the rotating hollow pipe makes the rotating disc rotate synchronously, the falling low concentration of sulfur-containing waste liquid will fall on the rotating disc to form a uniform liquid film, the oxidant sprayed from the nozzle at the upper end of the rotating disc is uniformly distributed in the form of fine mist on the waste liquid film, and the oxidant reacts with the sulfide and organic matter pollutants in the waste liquid to realize the efficient recovery and treatment of the low concentration of sulfur-containing waste liquid.

[0022] Compared with the prior art, the beneficial effects of the present application are:

[0023] 1. The present application is provided with a pretreatment tank on one side of the upper end of the base, a first treatment is formed in the inside of the pretreatment tank, and the low concentration of sulfur-containing waste liquid is introduced into the first treatment cavity to start the ultrasonic generator to generate ultrasonic waves, which are received by the ultrasonic transducer, and the sound wave energy is converted into mechanical vibration, which drives the metal vibrating piece to vibrate at high frequency, when the metal vibrating piece vibrates at high frequency in the waste liquid, the micro displacement and acceleration generated on the surface of the metal vibrating piece will drive the surrounding waste liquid molecules to vibrate, forming a strong sound field, in which the cavitation effect is significantly enhanced, the micro bubble nucleus in the waste liquid is disturbed more strongly, and the cycle process of vibration, expansion and closure is more easily achieved, and the high temperature and high pressure points generated by the cavitation effect can destroy the surface structure of impurity particles, promoting their coalescence and sedimentation, thereby effectively reducing the impurity content such as suspended solids and colloidal particles in the waste liquid.

[0024] 2. The waste water passing through the first treatment cavity enters the second treatment cavity, so that the waste liquid after preliminary treatment is filtered by the filter plate for the second time, and the first motor is started to drive the rotating shaft to rotate, which drives the three protrusions to rotate synchronously, the rotation of the protrusions drives the filter plate to move upwards, at this time the return spring is stretched, and when the protrusions rotate, the drag on the filter plate is released, and under the elastic action of the return spring, the filter plate moves downwards, and the up-down movement of the filter plate avoids the blockage of impurities, since the filter plate can automatically clean the impurities, the wear and damage caused by long-term blockage are avoided, thereby significantly prolonging the service life of the filter plate, which not only reduces the frequency and cost of replacing the filter plate, but also improves the stability and reliability of the entire waste liquid treatment, and the impurities on the filter plate can be removed by opening the rotating door.

[0025] 3. The application is provided with a biological tank at the middle position of the upper end of the base, the waste liquid after preliminary filtration enters the biological tank, four biological purifiers are arranged in the biological tank, the biological purifiers are filled with high-efficiency microbial flora and biological carrier materials, the microbial flora has strong sulfur oxidation capacity, can rapidly oxidize sulfides such as sulfates and sulfites in the waste liquid into sulfate ions, significantly reduces the sulfur content in the waste liquid, and the microorganisms can also tolerate low-concentration waste liquid environment, maintain high-efficiency and stable purification effect, the top cover can be moved up by starting the electric telescopic rod, the lifting frame can be moved up synchronously, the biological purifier is drawn out of the biological tank, so that the biological tank is replaced, and the long-term purification effect is ensured.

[0026] 4. The application is provided with an oxidation tank on the other side of the upper end of the base, a rotating disc is arranged on the lower side in the oxidation tank, the treated waste liquid can be sucked into the nozzle and sprayed out by starting the water pump, at this time, the oxidant in the storage tank can enter the hollow pipe, and then be transported to the rotating disc through the hollow pipe, and be sprayed out through the nozzle on the upper end of the rotating disc, the transmission gear can be rotated by starting the second motor, the hollow pipe can be rotated under the meshing transmission of the transmission gear, so that the rotating disc can be rotated synchronously, the falling waste liquid can form a uniform liquid film on the surface of the rotating disc, and the oxidant sprayed out of the nozzle on the upper end of the rotating disc is uniformly distributed on the liquid film in the form of fine mist, and has a strong oxidation reaction with sulfides, organic matter and other pollutants in the waste liquid, the oxidant has strong oxidizing property, can rapidly destroy the molecular structure of the pollutants, and convert them into harmless or low-toxic substances, the high-speed rotation of the rotating disc not only promotes the full mixing of the waste liquid and the oxidant, but also disperses the small particles and bubbles in the waste liquid through the centrifugal force, increases the contact area of the reactants, and accelerates the oxidation reaction, realizes the efficient oxidation treatment of the waste liquid, and further does not need additional devices for treatment. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the three-dimensional structure of the application;

[0028] Figure 2 It is a schematic diagram of the internal structure of the application;

[0029] Figure 3 It is a schematic diagram of the overall structure of the application;

[0030] Figure 4 It is a schematic diagram of the internal structure of the application;

[0031] Figure 5 It is a schematic diagram of the internal structure of the application; Figure 2 It is a local enlarged view of area A in the middle;

[0032] Figure 6 The application provides a low-concentration sulfur-containing waste liquid high-efficiency recovery treatment device Figure 2 The local amplification view of the B region in the application.

[0033] In the figure: 1, base; 2, pretreatment box; 3, biological box; 4, oxidation box; 5, first treatment cavity; 6, second treatment cavity; 7, electric valve; 8, control panel; 9, ultrasonic generator; 10, ultrasonic transducer; 11, metal vibrating plate; 12, first motor; 13, rotating rod; 14, protruding block; 15, filter plate; 16, supporting block; 17, reset spring; 18, top cover; 19, electric telescopic rod; 20, lifting frame; 21, biological purifier; 22, connecting pipe; 23, water pump; 24, nozzle; 25, rotating disc; 26, hollow pipe; 27, transmission cavity; 28, second motor; 29, rotating shaft; 30, transmission gear; 31, bearing; 32, liquid adding pipe; 33, storage box; 34, rotating door. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the application will be apparently and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application.

[0035] Please refer to Figures 1-6 An embodiment provided by the application is a low-concentration sulfur-containing waste liquid high-efficiency recovery treatment device, which comprises a base 1, a biological box 3 arranged at the middle position of the upper end of the base 1, a pretreatment box 2 arranged at one side of the upper end of the base 1, an oxidation box 4 arranged at the other side of the upper end of the base 1, and a rotating door 34 arranged at the lower side of the front end of the biological box 3.

[0036] The device further comprises a first treatment cavity 5 arranged at the upper end inside the pretreatment box 2, a second treatment cavity 6 arranged at the lower end inside the pretreatment box 2, an electric valve 7 arranged between the first treatment cavity 5 and the second treatment cavity 6, the second treatment cavity 6 in communication with the biological box 3, ultrasonic transducers 10 arranged at the two sides of the first treatment cavity 5, metal vibrating plates 11 arranged at the two sides inside the first treatment cavity 5 and sealed and fixed with the first treatment cavity 5, and a filter plate 15 arranged to slide at the upper side inside the second treatment cavity 6.

[0037] The device further comprises a rotating disc 25 arranged at the lower side inside the oxidation box 4, a plurality of nozzles 24 arranged at the two sides above the rotating disc 25, a transmission cavity 27 arranged at the upper side inside the oxidation box 4, and a hollow pipe 26 arranged to rotate at one side of the upper end inside the transmission cavity 27 and in communication with the rotating disc 25.

[0038] In use, the waste liquid enters the first treatment cavity 5 of the pretreatment box 2, the ultrasonic wave generated by the ultrasonic generator 9 makes the metal vibrating piece 11 vibrate, which promotes the coagulation and sedimentation of impurities, then the waste liquid flows into the second treatment cavity 6 through the electric valve 7, under the reciprocating movement of the filter plate 15, effectively preventing the impurities from blocking, then the waste liquid enters the biological box 3 and reacts with the microorganism flora in the biological purifier 21, significantly reducing the sulfur content, the biological purifier 21 is replaced conveniently through the electric telescopic rod 19 and the lifting frame 20, finally the waste liquid enters the oxidation box 4, forms a liquid film through the rotation of the rotating disc 25, and fully reacts with the oxidizing agent sprayed by the nozzle 24, efficiently removing sulfides and organic matter, the whole treatment process has high automation degree, compact structure and remarkable treatment effect.

[0039] Please refer to Figure 2 , the outside of the ultrasonic transducer 10 is provided with the ultrasonic generator 9, and the output end of the ultrasonic generator 9 is electrically connected with the input end of the ultrasonic transducer 10, the two sides of the upper side of the front end of the pretreatment box 2 are provided with the control panel 8, the ultrasonic transducer 10 can ensure that the electric energy generated by the ultrasonic generator 9 is efficiently converted into ultrasonic vibration, which directly acts on the waste liquid through the ultrasonic transducer 10, realizing the rapid coagulation and sedimentation of impurity particles in the waste liquid and improving the pretreatment efficiency.

[0040] Please refer to Figure 2 and Figure 4 , four supporting blocks 16 are arranged below the filter plate 15, and the supporting blocks 16 are all welded and fixed with the second treatment cavity 6, and the supporting blocks 16 and the filter plate 15 are all connected through the return springs 17, the supporting blocks 16 provide stable support for the filter plate 15, and the return springs 17 can make the filter plate 15 move up and down under the pushing of the protruding blocks 14, effectively preventing the impurities from blocking the filter plate 15 during the filtration process, and improving the filtration efficiency and stability.

[0041] Please refer to Figure 1 , Figure 2 and Figure 4 , two first motors 12 are installed on the lower side of one side of the base 1, rotating rods 13 are arranged on the front and rear sides below the filter plate 15, and the rotating rods 13 are all rotationally connected with the second treatment cavity 6, the output ends of the first motors 12 are all transmissionally connected with the rotating rods 13 through couplings, and the outer walls of the rotating rods 13 are all welded with three equidistantly distributed protruding blocks 14, the rotating rods 13 and the protruding blocks 14 are driven to rotate through the first motors 12, which can periodically push the filter plate 15 to move up and down, realizing the automatic cleaning and anti-blocking function of the filter plate 15, and improving the automation degree and filtration effect of the equipment.

[0042] Please refer to Figure 1 and Figure 2Two electric telescopic rods 19 are installed on both sides of the biological tank 3, a top cover 18 is arranged above the biological tank 3, and the top cover 18 is connected with the output end of the electric telescopic rod 19, a lifting frame 20 is arranged below the top cover 18, a plurality of through holes in a rectangular array are arranged on the outer wall of the lifting frame 20, four biological purifiers 21 are arranged on the upper end of the lifting frame 20, and the electric telescopic rod 19 can conveniently control the lifting of the top cover 18 and the lifting frame 20, so as to realize the quick replacement and maintenance of the biological purifier 21, and improve the maintenance convenience and operation efficiency of the equipment.

[0043] Please refer to Figure 2 A water pump 23 is arranged on one side of the upper end inside the oxidation tank 4, the water pump 23 is connected with the biological tank 3 and the nozzle 24 through the connecting pipe 22, the water pump 23 can stably pump the pretreated waste liquid from the biological tank 3 to the nozzle 24 for spraying, so as to ensure that the waste liquid is uniformly distributed in the oxidation tank and fully contacts with the oxidant, and improve the efficiency and quality of the oxidation reaction.

[0044] Please refer to Figure 5 A second motor 28 is arranged on one side of the upper end inside the transmission cavity 27, a rotating shaft 29 is arranged on the output end of the second motor 28 through a shaft coupling, one end of the rotating shaft 29 is rotationally connected with the transmission cavity 27, and the second motor 28 provides a stable power source for the rotating shaft 29 and the subsequent transmission gear 30, and through the shaft coupling, the effective transmission of the power is ensured, and the accurate control of the rotating disc 25 and the hollow pipe 26 is realized.

[0045] Please refer to Figure 5 The outer wall of the rotating shaft 29 and the outer wall of one end of the hollow pipe 26 inside the transmission cavity 27 are both provided with transmission gears 30, and the transmission gears 30 are meshingly connected, and through the meshing transmission of the transmission gears 30, it can be ensured that the rotary motion of the rotating shaft 29 is accurately transmitted to the hollow pipe 26, so as to drive the rotating disc 25 to rotate synchronously, and the uniform distribution of the waste liquid on the rotating disc and the full mixing with the oxidant are realized.

[0046] Please refer to Figure 1 、 Figure 2 and Figure 5 One end of the storage tank 33 is provided with a liquid adding pipe 32, one end of the liquid adding pipe 32 extends into the inside of the hollow pipe 26, the outer wall of one end of the liquid adding pipe 32 inside the hollow pipe 26 is provided with a bearing 31, the inner wall of the bearing 31 is connected with the outer wall of the liquid adding pipe 32, and the outer wall of the bearing 31 is connected with the inner wall of the hollow pipe 26, the storage tank 33 provides convenience for the storage of the oxidant, the liquid adding pipe 32 ensures that the oxidant can smoothly enter the hollow pipe 26 and be delivered to the nozzle above the rotating disc for spraying, and at the same time, the setting of the bearing 31 allows the liquid adding pipe 32 to remain relatively stationary when rotating inside the hollow pipe 26, and ensures the stability of the delivery of the oxidant.

[0047] The recovery method of the high-efficiency recovery treatment device for low-concentration sulfur-containing waste liquid comprises the following steps:

[0048] Step one: the low-concentration sulfur-containing waste liquid is added into the first treatment cavity 5 through the upper end feeding port of the pretreatment box 2, the ultrasonic generator 9 is started through the control panel 8, the ultrasonic generator 9 generates ultrasonic waves, the metal vibrating piece 11 vibrates at high frequency after receiving the ultrasonic waves, the micro displacement and acceleration of the surface of the metal vibrating piece 11 in the low-concentration sulfur-containing waste liquid will drive the surrounding waste liquid molecules to vibrate, forming a strong sound field, destroying the surface structure of the impurity particles in the low-concentration sulfur-containing waste liquid, and promoting the coalescence and settlement between the impurities;

[0049] Step two: after the low-concentration sulfur-containing waste liquid is preliminarily treated, the electric valve 7 is started to make the low-concentration sulfur-containing waste liquid enter the second treatment cavity 6, the filter plate 15 filters the low-concentration sulfur-containing waste liquid, the first motor 12 is started, the first motor 12 rotates the rotating rod 13 through the shaft coupling, the rotating rod 13 rotates to drive the protruding block 14 to rotate, the protruding end of the protruding block 14 pushes the filter plate 15 to move upwards, the reset spring 17 is stretched, the protruding end of the protruding block 14 rotates to the lower side to release the pushing of the filter plate 15, the elastic restoring force of the reset spring 17 drives the filter plate 15 to move downwards, and the movement of the filter plate 15 avoids the blockage of impurities during filtration;

[0050] Step three: the pretreated low-concentration sulfur-containing waste liquid enters the inside of the biological box 3, the low-concentration sulfur-containing waste liquid reacts with the microorganism flora and biological carrier material filled in the biological purifier 21, the sulfide in the waste liquid is oxidized to sulfate ion, the content of sulfur in the waste liquid is reduced, the electric telescopic rod 19 is started to make the top cover 18 move upwards, the top cover 18 drives the lifting frame 20 to move upwards synchronously, the biological purifier 21 moves to the outside of the biological box 3, and the biological purifier 21 is replaced;

[0051] Step four: the water pump 23 is started, the low-concentration sulfur-containing waste liquid enters the nozzle 24 and is sprayed out through the connecting pipe 22, the oxidant enters the inside of the hollow pipe 26 through the liquid adding pipe 32 of the storage box 33, the second motor 28 is started, the rotating shaft 29 is rotated through the shaft coupling, the rotating shaft 29 starts the transmission gear 30 to rotate, another transmission gear 30 drives the hollow pipe 26 to rotate under the meshing transmission of the transmission gear 30, the bearing 31 ensures the relative rotation of the hollow pipe 26 and the liquid adding pipe 32, the rotating hollow pipe 26 synchronously rotates the rotating disc 25, the falling low-concentration sulfur-containing waste liquid falls on the rotating rotating disc 25 to form a uniform liquid film, the oxidant sprayed out of the nozzle at the upper end of the rotating disc 25 is uniformly distributed on the waste liquid film in the form of fine mist, and the oxidant reacts with the sulfide and organic pollutant in the waste liquid to realize the high-efficiency recovery treatment of the low-concentration sulfur-containing waste liquid.

[0052] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims shall be construed as limiting the scope of the claims.

Claims

1. A low-concentration sulfur-containing waste liquid efficient recovery method, using a low-concentration sulfur-containing waste liquid efficient recovery treatment device for recovery treatment, the low-concentration sulfur-containing waste liquid efficient recovery treatment device comprising a base (1), a biological tank (3) being arranged at the middle position of the upper end of the base (1), a pretreatment tank (2) being arranged at one side of the upper end of the base (1), and an oxidation tank (4) being arranged at the other side of the upper end of the base (1), a rotating door (34) being arranged at the lower side of the front end of the biological tank (3), characterized in that: a first treatment cavity (5) is further arranged at the upper end inside the pretreatment tank (2), a second treatment cavity (6) is further arranged at the lower end inside the pretreatment tank (2), the first treatment cavity (5) and the second treatment cavity (6) are connected in communication through an electric valve (7), the second treatment cavity (6) is connected in communication with the biological tank (3), ultrasonic transducers (10) are arranged at both sides of the first treatment cavity (5), metal vibration pieces (11) are arranged at both sides inside the first treatment cavity (5), and the metal vibration pieces (11) are sealingly fixed with the first treatment cavity (5), and a filter plate (15) is slidingly arranged at the upper side inside the second treatment cavity (6); a rotating disc (25) is further arranged at the lower side inside the oxidation tank (4), a plurality of nozzles are arranged at the upper end of the rotating disc (25), a transmission cavity (27) is arranged at the upper side inside the oxidation tank (4), a hollow pipe (26) is rotatably arranged at one side of the upper end inside the transmission cavity (27), the hollow pipe (26) is connected in communication with the rotating disc (25), and nozzles (24) are installed at both sides directly above the rotating disc (25); the method comprises the following steps: Step one: the low-concentration sulfur-containing waste liquid is added into the first treatment cavity (5) through the upper end feeding port of the pretreatment tank (2), the ultrasonic generator (9) is started through the control panel (8), the ultrasonic generator (9) generates ultrasonic waves, the metal vibration pieces (11) vibrate at high frequency after receiving the ultrasonic waves, the micro displacement and acceleration generated on the surface of the metal vibration pieces (11) when vibrating at high frequency in the low-concentration sulfur-containing waste liquid will drive the surrounding waste liquid molecules to vibrate, forming a strong sound field, destroying the surface structure of the impurity particles in the low-concentration sulfur-containing waste liquid, and promoting the coalescence and settlement between the impurities; Step two: after the low-concentration sulfur-containing waste liquid is preliminarily treated, the electric valve (7) is started, the low-concentration sulfur-containing waste liquid enters the inside of the second treatment cavity (6), the filter plate (15) filters the low-concentration sulfur-containing waste liquid, the first motor (12) is started, the rotating rod (13) is rotated through the coupling, the rotating rod (13) rotates to drive the protruding block (14) to rotate, the protruding end of the protruding block (14) pushes the filter plate (15) to move upwards, the return spring (17) is stretched, the protruding end of the protruding block (14) rotates to the lower side to release the pushing of the filter plate (15), the elastic restoring force of the return spring (17) drives the filter plate (15) to move downwards, and the movement of the filter plate (15) avoids the blockage of impurities during filtration. ​ Step three: the low concentration of sulfur-containing waste liquid after pretreatment will enter the inside of the biological box (3), the low concentration of sulfur-containing waste liquid reacts with the microorganism flora and biological carrier material filled in the biological purifier (21), the sulfide in the waste liquid is oxidized to sulfate ion, the sulfur content in the waste liquid is reduced, the top cover (18) is moved up by starting the electric telescopic rod (19), the top cover (18) drives the lifting frame (20) to move up synchronously, the biological purifier (21) is moved to the outside of the biological box (3), and the biological purifier (21) is replaced; Step four: start the water pump (23), make the low concentration of sulfur-containing waste liquid enter the nozzle (24) and spray out through the connecting pipe (22), the storage tank (33) makes the oxidizing agent enter the inside of the hollow pipe (26) through the liquid adding pipe (32), start the second motor (28), make the rotating shaft (29) rotate through the shaft coupling, the rotating shaft (29) starts the transmission gear (30) to rotate, another transmission gear (30) drives the hollow pipe (26) to rotate under the meshing transmission of the transmission gear (30), the bearing (31) ensures the relative rotation of the hollow pipe (26) and the liquid adding pipe (32), the rotating hollow pipe (26) makes the rotating disc (25) rotate synchronously, the falling low concentration of sulfur-containing waste liquid falls on the rotating disc (25), forms a uniform liquid film, the oxidizing agent sprayed from the nozzle at the upper end of the rotating disc (25) is uniformly distributed in the form of fine mist on the waste liquid film, and the oxidizing reaction of the sulfide and organic pollutant in the waste liquid is realized, so that the low concentration of sulfur-containing waste liquid is efficiently recovered and treated.

2. The method according to claim 1, wherein the method is characterized by: The outside of the ultrasonic transducer (10) is provided with an ultrasonic generator (9), and the output end of the ultrasonic generator (9) is electrically connected with the input end of the ultrasonic transducer (10).

3. The method according to claim 1, wherein the method is characterized by: Four supporting blocks (16) are arranged below the filter plate (15) and are welded and fixed with the second treatment cavity (6), and a reset spring (17) is arranged between each supporting block (16) and the filter plate (15).

4. The method according to claim 3, wherein the low concentration sulfur-containing waste liquid is a sulfur-containing waste liquid containing 0.1 to 5 g / L of sulfur. Two first motors (12) are arranged on the lower side of one side of the base (1), rotating rods (13) are arranged in front of and behind the filter plate (15) below, and the rotating rods (13) are rotationally connected with the second treatment cavity (6), the output ends of the first motors (12) are drivingly connected with the rotating rods (13) through shaft couplings, and three equidistant protrusions (14) are welded on the outer wall of each rotating rod (13).

5. The method of claim 1, wherein the low concentration sulfur-containing waste liquid is recovered with high efficiency. Two electric telescopic rods (19) are arranged on the two sides of the biological box (3), a top cover (18) is arranged above the biological box (3) and is connected with the output ends of the electric telescopic rods (19), a lifting frame (20) is arranged below the top cover (18), a plurality of through holes arranged in a rectangular array are formed in the outer wall of the lifting frame (20), and four biological purifiers (21) are arranged on the upper end of the lifting frame (20).

6. The method of claim 1, wherein the low concentration sulfur-containing waste liquid is recovered with high efficiency. One side of the upper end of the oxidation box (4) is provided with a water pump (23), and the water pump (23) is connected with the biological box (3) and the nozzle (24) through the connecting pipe (22).

7. The method of claim 1, wherein the low concentration sulfur-containing waste liquid is recovered with high efficiency. One side of the upper end of the transmission cavity (27) is provided with a second motor (28), the output end of the second motor (28) is provided with a rotating shaft (29) through a shaft coupling, and one end of the rotating shaft (29) is rotatably connected with the transmission cavity (27).

8. The method according to claim 7, wherein the low concentration sulfur-containing waste liquid is a sulfur-containing waste liquid containing 0.1 to 5 g / L of sulfur. The outer wall of the rotating shaft (29) and the outer wall of the hollow pipe (26) located at one end of the transmission cavity (27) are both provided with transmission gears (30), and the transmission gears (30) are meshedly connected.

9. The method of claim 1, wherein the low concentration sulfur-containing waste liquid is recovered with high efficiency. One side of the upper end of the oxidation box (4) is provided with a storage box (33), one end of the storage box (33) is provided with a liquid adding pipe (32), one end of the liquid adding pipe (32) extends into the hollow pipe (26), a bearing (31) is arranged on the outer wall of the hollow pipe (26) at one end of the liquid adding pipe (32), the inner wall of the bearing (31) is connected with the outer wall of the liquid adding pipe (32), and the outer wall of the bearing (31) is connected with the inner wall of the hollow pipe (26).

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