Hexazinone wastewater desalting process

Abstract

The invention relates to the technical field of hexazinone wastewater treatment, in particular to a hexazinone wastewater desalting process which comprises the following specific steps: hexazinone wastewater is introduced into a pretreatment mechanism, the pretreatment mechanism comprises a precipitation barrel and a stirring barrel, a motor is arranged at the top of the precipitation barrel, a plurality of stirring rods are arranged on the peripheral wall of the stirring barrel, and the stirring rods are arranged on the top of the precipitation barrel; a coagulant is added into the precipitation cylinder, and the output end of the motor drives the stirring cylinder to rotate; sediments in the wastewater are filtered and then introduced into a heating pipe, and the heating pipe is connected with a vacuum pump and a condensation pipe; the heating pipe is heated, the pressure in the heating pipe is reduced through the vacuum pump, and water vapor is guided into the condensation pipe to be condensed and recycled after being evaporated; introducing the residual salt-containing concentrated solution in the heating pipe into a separation mechanism, wherein the separation mechanism comprises a separation box and a semi-permeable membrane; a pressure pump is arranged on the separation box, so that the pressure in the separation box is increased, salt and other soluble solid substances are intercepted on one side of the semi-permeable membrane, only water molecules are allowed to pass through, and deep desalination of the wastewater is realized.

Description

Technical Field

[0001] The invention relates to the technical field of hexazinone wastewater treatment, in particular to a hexazinone wastewater desalination process. Background Art

[0002] Cyclozinone, also known as Lincaojing, is a highly effective, low-toxic herbicide that is widely used in clearing obstacles and weeds in forests, airports, railways, industrial areas, and in field weeding of crops such as bananas and sugarcane. However, the production process of cyclozinone produces a large amount of wastewater, which is not only rich in chemical oxygen demand, but also contains high concentrations of highly toxic substances such as dimethyl sulfate and dimethylamine, as well as high concentrations of salt, such as inorganic salts such as sodium chloride. These components make cyclozinone wastewater extremely bioinhibitory and difficult to directly treat biochemically.

[0003] The traditional cyclohexane wastewater desalination process generally adds a coagulant to the wastewater to make the colloids and suspended matter in the wastewater form flocs and precipitate. After filtration, the metabolic action of microorganisms is used to remove the dissolved organic matter and part of the salt in the wastewater, and then membrane technology or ion exchange technology is used to further remove the salt in the wastewater.

[0004] However, when filtering the sediment, larger sediments are prone to cause blockage, affecting the filtration efficiency. At the same time, during the biochemical treatment process, the metabolic activity of microorganisms is seriously affected due to the inhibitory effects of salt and toxic substances, resulting in low organic matter removal rate and salt removal rate, and limited wastewater recycling. Summary of the invention

[0005] The purpose of the present application is to provide a cycloazinone wastewater desalination process, which can effectively isolate larger precipitates by arranging filter holes on the outer peripheral wall of the mixing drum, and at the same time, the water in the wastewater is evaporated and condensed and recovered through evaporation concentration, thereby reducing the discharge of wastewater and realizing the reuse of resources.

[0006] To achieve the above purpose, the present application provides a hexazinone wastewater desalination process, the specific steps are as follows:

[0007] The first step is to introduce the hexazinone wastewater into a pretreatment mechanism, which includes a sedimentation cylinder and a stirring cylinder. A motor is provided on the top of the sedimentation cylinder, and a plurality of stirring rods are provided on the outer peripheral wall of the stirring cylinder. A coagulant is added into the sedimentation cylinder, and the output end of the motor drives the stirring cylinder to rotate, so that the colloid, suspended matter and some soluble organic matter in the wastewater are flocculated into larger precipitates;

[0008] The second step is to filter the sediment in the wastewater and pass it into a heating pipe, which is connected to a vacuum pump and a condenser;

[0009] The third step is to heat the heating tube, and then reduce the pressure in the heating tube through a vacuum pump to reduce the boiling point of water. The water vapor in the wastewater evaporates and is introduced into the condenser for condensation recovery;

[0010] Step 4: introducing the remaining salt-containing concentrated liquid in the heating tube into a separation mechanism, wherein the separation mechanism comprises a separation box and a semipermeable membrane; the semipermeable membrane is arranged in the middle of the separation box; and a pressure pump is arranged on the separation box;

[0011] Step 5: Use a pressure pump to increase the pressure inside the separation box, so that the salt and other soluble solid matter in the salt concentrate is retained on one side of the semi-permeable membrane, and only water molecules are allowed to pass through, thus achieving deep desalination of the wastewater.

[0012] As a further solution of the present invention: a plurality of filter holes are arranged in an annular shape on the outer peripheral wall of the mixing drum, the interior of the mixing drum is a hollow structure, a water outlet pipe is opened at the bottom of the sedimentation drum, the water outlet pipe is located inside the mixing drum in the projection of the horizontal plane, and a discharge pipe is arranged on the side wall of the sedimentation drum.

[0013] As a further solution of the present invention: a filter box is connected to the bottom of the water outlet pipe, a first slide groove is provided on the side wall of the filter box, a filter plate is slidably provided in the first slide groove, a guide pipe is provided on the side wall of the filter box, and the guide pipe is connected to the heating pipe.

[0014] As a further solution of the present invention: a second slide groove is arranged on the top of the separation box, the semipermeable membrane is slidably matched with the second slide groove, blocks are arranged on both sides of the semipermeable membrane, the blocks are connected to the inner side walls of the semipermeable membrane with springs, a slot is opened on the side walls of the second slide groove, the blocks are matched with the slot, a push plate is arranged inside the slot, one end of the push plate abuts against the side wall of the block, and the other end passes through the slot and is connected to a push rod.

[0015] As a further solution of the present invention: the side wall of the block is provided with rounded corners.

[0016] As a further solution of the present invention: a rubber pad is arranged at the bottom of the semipermeable membrane, a mounting groove is arranged inside the separation box, and the rubber pad is adapted to the mounting groove.

[0017] As a further solution of the present invention: a first handle is provided on the outer side wall of the filter plate.

[0018] As a further solution of the present invention: a second handle is arranged on the top of the semipermeable membrane.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention can effectively remove impurities such as colloids, suspended matter, soluble organic matter and salt in wastewater through the treatment of pretreatment mechanism, evaporation concentration and separation mechanism, thereby improving the treatment efficiency. At the same time, the water in the wastewater is evaporated and condensed for recovery, thereby reducing the discharge of wastewater and realizing the reuse of resources.

[0021] 2. The present invention can effectively isolate larger sediments by setting filter holes on the outer wall of the mixing drum. After the wastewater and smaller sediments pass through the filter holes and are discharged from the outlet pipe, they are filtered again, which can avoid the accumulation of larger sediments during filtration and affect the filtration efficiency.

[0022] 3. The present invention further removes smaller particles and suspended matter in the wastewater by providing a filter box and a filter plate, thereby improving the cleanliness of the wastewater and the efficiency of subsequent treatment. At the same time, the filter plate slides with the first chute, and under the action of the first handle, the installation, disassembly and cleaning of the filter plate become simple, thereby reducing maintenance costs and time.

[0023] 4. The present invention facilitates and quickly installs and fixes the semipermeable membrane through the design of the card block and the spring, so that the semipermeable membrane can maintain stable sliding in the second slide groove, avoiding leakage problems caused by shaking or misalignment; at the same time, through the cooperation of the push plate and the push rod, the card block can be easily separated from the card slot, the semipermeable membrane can be disassembled, the cleaning and replacement of the semipermeable membrane is convenient, and the efficiency of wastewater treatment is improved.

[0024] 5. The present invention provides a sealing gasket at the bottom of the semipermeable membrane, which can fit tightly in the installation groove to prevent wastewater from leaking from the gap between the semipermeable membrane and the separation box during the treatment process; at the same time, the rubber gasket can increase the friction between the semipermeable membrane and the separation box, making the semipermeable membrane more stable in the installation groove and not easy to loosen or shift due to water impact or vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the prior art and the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a three-dimensional structural schematic diagram of a cyclohexanone wastewater desalination process.

[0027] Figure 2 Schematic diagram of the three-dimensional structure of the filter box installation.

[0028] Figure 3 It is a schematic diagram of the three-dimensional structure of the mixing drum.

[0029] Figure 4 Schematic diagram of semipermeable membrane installation.

[0030] Figure 5 It is a schematic diagram of the three-dimensional structure of the separation box.

[0031] Figure 6 Schematic diagram of the three-dimensional structure of a semipermeable membrane.

[0032] Figure 7 This is a cross-sectional view of the interior of the separation box.

[0033] The reference numerals in the figure are: 1. sedimentation cylinder; 11. motor; 12. water outlet pipe; 13. discharge pipe; 2. mixing cylinder; 21. mixing rod; 22. filter hole; 3. heating tube; 31. vacuum pump; 32. condenser; 4. filter box; 41. first slide groove; 42. filter plate; 43. first handle; 44. guide tube; 5. separation box; 51. second slide groove; 52. card slot; 53. installation slot; 6. semipermeable membrane; 61. block; 62. fillet; 63. spring; 64. second handle; 65. rubber pad; 7. pressure pump; 8. push plate; 81. push rod. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0035] like Figures 1 to 7 As shown, a hexazinone wastewater desalination process, the specific steps are as follows:

[0036] The first step is to introduce the hexazinone wastewater into a pretreatment mechanism, wherein the pretreatment mechanism includes a sedimentation drum 1 and a stirring drum 2. A motor 11 is provided on the top of the sedimentation drum 1, and a plurality of stirring rods 21 are provided on the outer peripheral wall of the stirring drum 2. A coagulant is added into the sedimentation drum 1, and the stirring drum 2 is driven to rotate by the output end of the motor 11, so as to drive the stirring rods 21 to stir the wastewater. Under the action of the coagulant, the colloid, suspended matter and some soluble organic matter in the wastewater are flocculated into larger precipitates;

[0037] Step 2: After filtering, the sediment in the wastewater is passed into the heating tube 3, and the heating tube 3 is connected to a vacuum pump 31 and a condenser 32;

[0038] Step 3: Heat the heating tube 3, and then reduce the pressure in the heating tube 3 through the vacuum pump 31 to reduce the boiling point of water. The water vapor in the wastewater evaporates and is introduced into the condenser 32 for condensation recovery.

[0039] Step 4: introduce the remaining salt-containing concentrated liquid in the heating tube 3 into a separation mechanism, wherein the separation mechanism comprises a separation box 5 and a semipermeable membrane 6; the semipermeable membrane 6 is arranged in the middle of the separation box 5; and a pressure pump 7 is arranged on the separation box 5;

[0040] Step 5: Increase the pressure inside the separation box 5 through the pressure pump 7, retain the salt and other soluble solid substances in the salt-containing concentrate on one side of the semipermeable membrane 6, and only allow water molecules to pass through, thereby achieving deep desalination of the wastewater.

[0041] Through the treatment of pretreatment mechanism, evaporation concentration and separation mechanism, this process can effectively remove impurities such as colloids, suspended matter, soluble organic matter and salt in wastewater, improve treatment efficiency, and at the same time, the water in the wastewater is evaporated and condensed for recovery, reducing the discharge of wastewater and realizing the reuse of resources.

[0042] A plurality of filter holes 22 are arranged in an annular pattern on the outer wall of the mixing drum 2. The interior of the mixing drum 2 is a hollow structure. A water outlet pipe 12 is provided at the bottom of the sedimentation drum 1. The water outlet pipe 12 is located inside the mixing drum 2 in the projection of the horizontal plane. A discharge pipe 13 is provided on the side wall of the sedimentation drum 1.

[0043] By setting the filter holes 22 on the outer wall of the mixing drum 2, larger sediments can be effectively isolated. After the wastewater and smaller sediments pass through the filter holes 22 and are discharged from the outlet pipe 12, they are filtered again, which can avoid the accumulation of larger sediments during filtration and affect the filtration efficiency.

[0044] The bottom of the water outlet pipe 12 is connected to a filter box 4, and a first slide groove 41 is provided on the side wall of the filter box 4. A filter plate 42 is slidably provided in the first slide groove 41, and a first handle 43 is provided on the outer wall of the filter plate 42; a guide pipe 44 is provided on the side wall of the filter box 4, and the guide pipe 44 is connected to the heating pipe 3.

[0045] By providing the filter box 4 and the filter plate 42, smaller particles and suspended solids in the wastewater are further removed, thereby improving the cleanliness of the wastewater and the efficiency of subsequent treatment. At the same time, the filter plate 42 slides with the first chute 41, and the first handle 43 makes it easier to install, disassemble and clean the filter plate 42, thereby reducing maintenance costs and time.

[0046] A second slide groove 51 is provided on the top of the separation box 5, and the semipermeable membrane 6 is slidably matched with the second slide groove 51. Blocks 61 are provided on both sides of the semipermeable membrane 6, and a spring 63 is connected to the block 61 and the side wall of the semipermeable membrane 6. A slot 52 is opened on the side wall of the second slide groove 51, and the block 61 is adapted to the slot 52. A push plate 8 is provided inside the slot 52, and one end of the push plate 8 abuts against the side wall of the block 61, and the other end passes through the slot 52 and is connected to a push rod 81. A second handle 64 is provided on the top of the semipermeable membrane 6.

[0047] When the semipermeable membrane 6 needs to be installed, the semipermeable membrane 6 is first placed in the second slide groove 51 at the top of the separation box 5, and then the semipermeable membrane 6 is slid along the direction of the slide groove to gradually enter the separation box 5. During the sliding process, the blocks 61 on both sides of the semipermeable membrane 6 will automatically pop outward under the action of the spring 63, and when the blocks 61 slide to the position corresponding to the slot 52, the elastic force of the spring 63 will push the blocks 61 into the slot 52, thereby fixing the semipermeable membrane 6.

[0048] When the semipermeable membrane 6 needs to be removed for cleaning or replacement, first push the push rod 81 to drive the push plate 8 to move in the card slot 52. One end of the push plate 8 abuts against the side wall of the block 61. As the push plate 8 moves, the block 61 will be gradually pushed out of the card slot 52, thereby releasing the fixation of the semipermeable membrane 6. At this time, the semipermeable membrane 6 can be slid out of the separation box 5 along the direction of the second slide groove 51 to complete the disassembly process. The semipermeable membrane 6 has selective permeability, which can allow some solvents such as water molecules to pass through, while preventing solutes such as salts, organic matter, etc. from passing through, thereby achieving the concentration and purification of wastewater.

[0049] Through the design of the block 61 and the spring 63, the semipermeable membrane 6 can be installed and fixed quickly and conveniently, so that the semipermeable membrane 6 can maintain stable sliding in the second slide groove 51, avoiding leakage problems caused by shaking or misalignment; at the same time, through the cooperation of the push plate 8 and the push rod 81, the block 61 can be easily separated from the slot 52, thereby realizing the disassembly of the semipermeable membrane 6, facilitating the cleaning and replacement of the semipermeable membrane 6, and improving the efficiency of wastewater treatment.

[0050] The side wall of the block 61 is provided with a rounded corner 62 .

[0051] The rounded corners 62 can guide the block 61 to slide more smoothly along the slide groove and engage with the groove 52, thereby reducing the possibility of jamming or blocking, making the installation and removal process of the semipermeable membrane 6 easier and more efficient.

[0052] A rubber pad 65 is disposed at the bottom of the semipermeable membrane 6 , and a mounting groove 53 is disposed inside the separation box 5 . The rubber pad 65 is adapted to the mounting groove 53 .

[0053] The rubber pad 65 has good elasticity and sealing properties, and can fit tightly in the installation groove 53 to prevent wastewater from leaking from the gap between the semipermeable membrane 6 and the separation box 5 during the treatment process; at the same time, the rubber pad 65 can increase the friction between the semipermeable membrane 6 and the separation box 5, making the semipermeable membrane 6 more stable in the installation groove 53 and not easy to loosen or shift due to water flow impact or vibration.

[0054] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hexazinone wastewater desalination process, characterized in that: Here are the steps: The first step is to introduce hexazinone wastewater into a pretreatment mechanism, wherein the pretreatment mechanism comprises a sedimentation cylinder (1) and a stirring cylinder (2), wherein a motor (11) is arranged on the top of the sedimentation cylinder (1), and a plurality of stirring rods (21) are arranged on the outer peripheral wall of the stirring cylinder (2). A coagulant is added into the sedimentation cylinder (1), and the output end of the motor (11) drives the stirring cylinder (2) to rotate, so that colloids, suspended matter and some soluble organic matter in the wastewater are flocculated into larger precipitates; Step 2: After filtering, the sediment in the wastewater is passed into a heating pipe (3), and the heating pipe (3) is connected to a vacuum pump (31) and a condenser (32); The third step is to heat the heating tube (3), and then reduce the pressure in the heating tube (3) through the vacuum pump (31) to reduce the boiling point of water. After the water vapor in the waste water evaporates, it is introduced into the condenser (32) for condensation recovery; Step 4: introducing the remaining salt-containing concentrated liquid in the heating tube (3) into a separation mechanism, wherein the separation mechanism comprises a separation box (5) and a semipermeable membrane (6); the semipermeable membrane (6) is arranged in the middle of the separation box (5); and a pressure pump (7) is arranged on the separation box (5); Step 5: The pressure inside the separation box (5) is increased by a pressure pump (7), so that the salt and other soluble solid substances in the salt-containing concentrate are retained on one side of the semipermeable membrane (6), and only water molecules are allowed to pass through, thereby achieving deep desalination of the wastewater.

2. A hexazinone wastewater desalination process according to claim 1, characterized in that: A plurality of filter holes (22) are arranged in an annular shape on the outer peripheral wall of the mixing drum (2); the interior of the mixing drum (2) is a hollow structure; a water outlet pipe (12) is provided at the bottom of the sedimentation drum (1); the water outlet pipe (12) is located inside the mixing drum (2) in projection on a horizontal plane; and a discharge pipe (13) is provided on the side wall of the sedimentation drum (1).

3. A hexazinone wastewater desalination process according to claim 2, characterized in that: The bottom of the water outlet pipe (12) is connected to a filter box (4), a first slide groove (41) is provided on the side wall of the filter box (4), a filter plate (42) is slidably provided in the first slide groove (41), a flow guide pipe (44) is provided on the side wall of the filter box (4), and the flow guide pipe (44) is connected to the heating pipe (3).

4. A hexazinone wastewater desalination process according to claim 1, characterized in that: A second slide groove (51) is arranged on the top of the separation box (5), the semipermeable membrane (6) is slidably matched with the second slide groove (51), blocks (61) are arranged on both sides of the semipermeable membrane (6), a spring (63) is connected between the block (61) and the side wall of the semipermeable membrane (6), a slot (52) is provided on the side wall of the second slide groove (51), the block (61) is matched with the slot (52), a push plate (8) is arranged inside the slot (52), one end of the push plate (8) is in contact with the side wall of the block (61), and the other end passes through the slot (52) and is connected with a push rod (81).

5. A hexazinone wastewater desalination process according to claim 4, characterized in that: The side wall of the block (61) is provided with a rounded corner (62).

6. A hexazinone wastewater desalination process according to claim 1, characterized in that: A rubber pad (65) is provided at the bottom of the semipermeable membrane (6), a mounting groove (53) is provided inside the separation box (5), and the rubber pad (65) is adapted to fit the mounting groove (53).

7. A hexazinone wastewater desalination process according to claim 3, characterized in that: The outer side wall of the filter plate (42) is provided with a first handle (43).

8. A hexazinone wastewater desalination process according to claim 1, characterized in that: A second handle (64) is provided on the top of the semipermeable membrane (6).

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