A multi-stage treatment device for urea catalytic hydrolysis wastewater

Abstract

The present invention relates to the technical field of wastewater treatment, and in particular to a multi-stage treatment device for urea catalytic hydrolysis wastewater, comprising: a stirring assembly, including a holding tank, a reciprocating rod arranged inside the holding tank, a first reciprocating groove arranged on the outer wall of the reciprocating rod, a first push plate arranged on the outer wall of the reciprocating rod, and a second push plate arranged inside the holding tank, and the second push plate is penetrated by a first through hole; a filtering assembly, a filter plate arranged inside the holding tank. The present invention utilizes two push plates to stir the internal wastewater to accelerate the mutual dissolution of the internal solution, utilizes two push plates to compress the internal space of the holding tank, accelerates the internal water flow rate, and further increases the mutual dissolution of the solution; at the same time, the push plates are used to change the water flow, so that the internal solution circulates in one direction, so that the mutually dissolvable solution can be filtered.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment, in particular to a multi-stage treatment device for urea catalytic hydrolysis wastewater. Background Art

[0002] Urea synthesis is the reaction of NH3 and CO2 to form ammonium carbamate, and then the ammonium carbamate is dehydrated at high temperature to form urea. In the flue gas denitrification process of thermal power plants, urea hydrolysis ammonia production technology is favored due to its environmental friendliness and operational safety. Urea, as a non-toxic and harmless solid chemical, generates ammonia through hydrolysis reaction, and then serves as a reducing agent in the selective catalytic reduction (SCR) denitrification process to effectively reduce the emission of oxides (NOx). The urea hydrolysis process is also accompanied by the generation of wastewater.

[0003] If the wastewater is discharged directly, it will cause varying degrees of pollution to the receiving water body and cause ecological damage. Therefore, the wastewater needs to be treated before being discharged. Most of the existing multi-stage treatment devices for urea catalytic hydrolysis wastewater in thermal power plants simply cool and filter the wastewater, and start discharging it after it meets the emission standards. However, the discharged water still contains a lot of impurities and cannot meet the requirements for use. Summary of the invention

[0004] Some simplifications or omissions may be made in this section and the abstract and title of the present application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the above problems or problems existing in the prior art, the present invention is proposed.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a multi-stage treatment device for urea catalytic hydrolysis wastewater, comprising a stirring assembly, including a holding tank, a reciprocating rod arranged inside the holding tank, a first reciprocating groove arranged on the outer wall of the reciprocating rod, a first push plate arranged on the outer wall of the reciprocating rod, and a second push plate arranged inside the holding tank, and the second push plate is penetrated by a first through hole;

[0007] A filter assembly is provided on a filter plate inside the holding tank.

[0008] As a preferred solution of the multi-stage treatment device for urea catalytic hydrolysis wastewater of the present invention, wherein: a first slide groove is provided on the inner wall of the first through hole;

[0009] A rotating shaft is arranged inside the holding tank, a stirring plate is arranged in an array on the outer wall of the rotating shaft, a groove is arranged on the outer wall of the stirring plate, and a rolling ball which can roll along the inner wall of the first slide groove is arranged inside the groove.

[0010] As a preferred solution of the multi-stage treatment device for urea catalytic hydrolysis wastewater of the present invention, wherein: the outer wall of the reciprocating rod is provided with a second reciprocating groove;

[0011] The inner wall of the second push plate is provided with a first sliding block which can slide along the inside of the second reciprocating groove;

[0012] The inner wall of the first push plate is provided with a first sliding block which can slide along the inside of the first reciprocating groove.

[0013] As a preferred solution of the multi-stage treatment device for urea catalytic hydrolysis wastewater described in the present invention, the inner wall of the holding tank is provided with a second slide groove, and the outer walls of the first push plate and the second push plate are both provided with a second sliding block that can slide along the inside of the second slide groove.

[0014] As a preferred solution of the multi-stage treatment device for urea catalytic hydrolysis wastewater described in the present invention, the outer wall of the holding tank is connected to a delivery pipe, both ends of the delivery pipe are connected to the interior of the holding tank, and the two ends of the delivery pipe are respectively on the upper and lower sides of the first push plate.

[0015] As a preferred solution of the multi-stage treatment device for urea catalytic hydrolysis wastewater of the present invention, wherein: a second through hole is penetrated through the first push plate, and a third slide groove is provided on the inner wall of the second through hole;

[0016] A blocking plate is provided inside the containing tank, and a third sliding block which can slide along the inside of the third sliding groove is provided on the end surface of the blocking plate.

[0017] As a preferred solution of the multi-stage treatment device for urea catalytic hydrolysis wastewater described in the present invention, a cover plate is provided on the end surface of the holding tank.

[0018] As a preferred solution of the multi-stage treatment device for urea catalytic hydrolysis wastewater of the present invention, wherein: an output shaft is arranged inside the reciprocating rod, one end of the output shaft is slidably connected with a driving shaft, an outer wall of the driving shaft is provided with a movable channel, a resistance rod is arranged inside the movable channel, and the resistance rod is connected to the inner wall of the movable channel by a first elastic member;

[0019] The inner wall array of the filter plate is provided with a limit block, and the outer wall of the limit block is provided with a first arc surface.

[0020] As a preferred solution of the multi-stage treatment device for urea catalytic hydrolysis wastewater of the present invention, the inner wall of the reciprocating rod is provided with a movable space, and the outer wall of the output shaft is provided with a resistance block that can slide along the inner part of the movable space.

[0021] As a preferred solution of the multi-stage treatment device for urea catalytic hydrolysis wastewater described in the present invention, the inner wall of the holding tank is provided with a closed-loop groove, and the outer wall of the filter plate is provided with a roller that can slide along the inside of the closed-loop groove.

[0022] Beneficial effects of the present invention: The present invention utilizes two push plates to stir internal wastewater, accelerates the internal solution dissolution, utilizes two push plates to compress the internal space of the holding tank, accelerates the internal water flow rate, and further increases the solution dissolution; at the same time, utilizes the push plates to change the water flow, allows the internal solution to circulate in one direction, and allows the miscible solution to be filtered. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. 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. Among them:

[0024] Figure 1 It is a schematic diagram of the overall appearance of a multi-stage treatment device for urea catalytic hydrolysis wastewater.

[0025] Figure 2 This is a schematic diagram of the overall internal structure of a multi-stage treatment device for urea catalytic hydrolysis wastewater.

[0026] Figure 3 A multi-stage treatment device for urea catalytic hydrolysis wastewater Figure 2 Schematic diagram of the enlarged structure of the "A" area.

[0027] Figure 4 It is a schematic diagram of the second push plate structure of the multi-stage treatment device for urea catalytic hydrolysis wastewater.

[0028] Figure 5 The diagram is a schematic diagram of the rotating shaft and stirring plate structure of a multi-stage treatment device for urea catalytic hydrolysis wastewater.

[0029] Figure 6 This is a schematic diagram of the position structure of the filter plates and reciprocating rods of a multi-stage treatment device for urea catalytic hydrolysis wastewater.

[0030] Figure 7 The present invention is a schematic diagram of the matching structure of the reciprocating rod and the output shaft of a multi-stage treatment device for urea catalytic hydrolysis wastewater.

[0031] Figure 8 A multi-stage treatment device for urea catalytic hydrolysis wastewater Figure 7 Schematic diagram of the enlarged structure of the "B" area in the middle.

[0032] Fig. 9This is a schematic diagram of the structural position of the reciprocating rod, output shaft and drive shaft of a multi-stage treatment device for urea catalytic hydrolysis wastewater.

[0033] Fig.10 The figure is a schematic diagram of the filter plate structure of a multi-stage treatment device for urea catalytic hydrolysis wastewater.

[0034] Fig.11 A multi-stage treatment device for urea catalytic hydrolysis wastewater Fig.10 Schematic diagram of the enlarged structure of the "C" region in the middle.

[0035] In the figure: 100, stirring assembly; 101, containing tank; 101a, second slide groove; 101b, closed loop groove; 102, reciprocating rod; 102a, first reciprocating groove; 102b, second reciprocating groove; 102c, activity space; 103, first push plate; 103a, second through hole; 103a-1, third slide groove; 104, second push plate; 104a, first through hole; 104a-1 first slide groove; 104b, The first slider; 104c, the second slider; 105, the rotating shaft; 105a, the stirring plate; 105a-1, the groove; 106, the rolling ball; 107, the conveying pipe; 108, the blocking plate; 108a, the third slider; 109, the cover plate; 200, the filter assembly; 201, the filter plate; 201a, the limit block; 201a-1, the first arc surface; 201b, the roller; 202, the output shaft; 202a, the resistance block. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0037] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0038] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0039] Example 1

[0040] Reference Figure 1~Figure 4, which is the first embodiment of the present invention, and provides a multi-stage treatment device for urea catalytic hydrolysis wastewater, comprising a stirring assembly 100, including a holding tank 101, a reciprocating rod 102 disposed inside the holding tank 101, a first reciprocating groove 102a disposed on the outer wall of the reciprocating rod 102, a first push plate 103 disposed on the outer wall of the reciprocating rod 102, and a second push plate 104 disposed inside the holding tank 101, and the second push plate 104 is penetrated by a first through hole 104a;

[0041] The filter assembly 200 is a filter plate 201 disposed inside the container 101 .

[0042] The container 101 is a hollow cylinder with an open top and a closed bottom. A bracket is fixedly mounted on the bottom surface of the container 101 so that the bottom surface of the container 101 does not contact the ground. The lower end of the reciprocating rod 102 passes through the container 101 and extends to the bottom of the container 101. The end of the reciprocating rod 102 extending out of the container 101 is connected to a servo motor. The servo motor is a conventional motor commonly used in the market that can control the speed and direction, which will not be described in detail here. The servo motor can The reciprocating rod 102 can be driven to rotate. In order to enable the reciprocating rod 102 to rotate and drive the first push plate 103 to move up and down at the same time, in this embodiment, a spiral groove is dug on the outer wall of the reciprocating rod 102, and a third slider is fixedly installed on the inner wall where the first push plate 103 and the reciprocating rod 102 are in contact. Relying on the friction between the first push plate 103 and the inner wall of the container 101, the rotation of the reciprocating rod 102 does not drive the first push plate 103 to rotate, but allows the third slider on the inner wall of the first push plate 103 to move along the inner wall of the container 101. The first reciprocating groove 102a that rises in a spiral moves internally, so that the first push plate 103 can be raised or lowered when the reciprocating rod 102 rotates. Here, the first push plate 103 is a solid plate without a through hole. In this embodiment, the second push plate 104 is fixed to the inner wall of the container 101 and does not contact the reciprocating rod 102. A plurality of first through holes 104a are arranged in an array and penetrate the second push plate 104. The sum of the cross-sectional areas of all the first through holes 104a is smaller than the cross-sectional area of ​​the second push plate 104. When the inner When the wastewater needs to be stirred, the servo motor drives the reciprocating rod 102 to rotate repeatedly, driving the first push plate 103 to move up and down, and the first push plate 103 pushes the wastewater to flow toward the second push plate 104, and the wastewater flows from the first through hole 104a to the top of the second push plate 104. Due to the small opening, the wastewater forms turbulence at the first through hole 104a, thereby achieving the stirring effect; when the servo motor reverses, the first push plate 103 moves downward, and the water flows downward from the first through hole 104a due to gravity.

[0043] A filter plate 201 is installed at the opening of the holding tank 101. The filter plate 201 is composed of an outer frame and a filter screen. The outer frame is mainly used to facilitate the installation of the filter screen on the inner wall of the holding tank 101. The filter screen is used to filter out large-grained impurities contained in the wastewater when it enters the tank.

[0044] In summary, when treating wastewater, the wastewater is first injected into the interior of the holding tank 101 from the upper end. This process needs to pass through the filter plate 201, and the impurities with larger particle sizes in the wastewater are filtered out through the filter net. Then, other solutions required for treating the wastewater are injected, and then the servo motor is started to allow the first push plate 103 to reciprocate up and down, so that the internal solution is continuously stirred and fully dissolved. The advantage of this design is that it can allow the solution inside the holding tank 101 to continuously form turbulence inside, allowing the solutions to continuously exchange positions, so that the solutions can be more fully dissolved in each other.

[0045] Example 2

[0046] Reference Figure 1 to Figure 6 , which is the second embodiment of the present invention, and which is different from the first embodiment in that: it also includes a first slide groove 104a-1 provided on the inner wall of the first through hole 104a;

[0047] A rotating shaft 105 is provided inside the holding tank 101, and a stirring plate 105a is arranged in an array on the outer wall of the rotating shaft 105. A groove 105a-1 is provided on the outer wall of the stirring plate 105a, and a rolling ball 106 that can roll along the inner wall of the first slide groove 104a-1 is provided inside the groove 105a-1.

[0048] Among them, in order to further accelerate the mutual dissolution of the solutions, an annular first chute 104a-1 is provided on the inner wall of the first through hole 104a, and the ball 106 can roll inside without falling, that is, more than half of the surface of the ball 106 is inside the first chute 104a-1, and the width of the first chute 104a-1 at the opening is smaller than the diameter of the ball 106; the part of the ball 106 exposed from the first chute 104a-1 abuts against the inside of the groove 105a-1 on the outer wall of the stirring plate 105a, and this design is to allow the rotating shaft 105 and the stirring plate 105a to rotate inside the first chute 104a-1; and the stirring plate 105a is not parallel to the second push plate 104. The advantage of this design is that the water surges from the first through hole 104a, which will thrust the stirring plate 105a inclined relative to the second push plate 104, so that the stirring plate 105a can rotate, stir the passing wastewater, and further repeatedly stir the wastewater solution.

[0049] The outer wall of the reciprocating rod 102 is provided with a second reciprocating groove 102b;

[0050] The inner wall of the second push plate 104 is provided with a first sliding block 104b which can slide along the inside of the second reciprocating groove 102b;

[0051] A first sliding block 104b is disposed on the inner wall of the first push plate 103 and can slide along the inside of the first reciprocating groove 102a.

[0052] A second slide groove 101 a is disposed on the inner wall of the holding tank 101 , and a second sliding block 104 c that can slide along the inside of the second slide groove 101 a is disposed on the outer walls of the first push plate 103 and the second push plate 104 .

[0053] Among them, this scheme changes the scheme of the first push plate 103 and the second push plate 104, and allows the second push plate 104 to be installed on the surface of the reciprocating rod 102; the first reciprocating groove 102a and the second reciprocating groove 102b of this scheme are both grooves with spiral grooves at both ends interlaced and interconnected at both ends. The first push plate 103 and the second push plate 104 are respectively installed at the position corresponding to the first reciprocating groove 102a and the position corresponding to the second reciprocating groove 102b, and the first slider 104b is rotatably installed on the inner wall of the first push plate 103 and the second push plate 104. When the reciprocating rod 102 rotates unidirectionally, the first push plate 103 and the second push plate 104 can reciprocate up and down; in order to ensure that the process movement can be carried out smoothly, the second slider 104c is fixedly installed on the outer wall of the first push plate 103 and the second push plate 104, and the second slider 104c can slide inside the vertical second slide groove 101a on the inner wall of the holding tank 101, ensuring that the first push plate 103 and the second push plate 104 can reciprocate up and down during the rotation of the reciprocating rod 102. The advantage of this design is that the movement of the first push plate 103 and the second push plate 104 will compress the space of the wastewater, further increase the flow speed of the wastewater through the first through hole 104a, further accelerate the rotation speed of the shaft 105, and enhance the stirring effect on the wastewater.

[0054] The outer wall of the holding tank 101 is connected with a delivery pipe 107 , both ends of the delivery pipe 107 are connected to the interior of the holding tank 101 , and both ends of the delivery pipe 107 are respectively on the upper and lower sides of the first push plate 103 .

[0055] Among them, the upper end of the delivery pipe 107 is distributed on the outer wall of the holding tank 101, and the lower end is installed on the lower surface of the holding tank 101, so that when the first push plate 103 moves downward, the wastewater can be transported from the lower end of the delivery pipe 107 to the upper end, and then flow back into the holding tank 101 above the second push plate 104; when the reciprocating rod 102 rotates, the first push plate 103 will move downward, and the second push plate 104 will move upward. The first push plate 103 transports the wastewater to the top of the second push plate 104 through the delivery pipe 107. At the same time, the second push plate 104 moves upward to accelerate the water flow and accelerate the stirring.

[0056] It should be noted that a one-way valve is installed at the lower end of the delivery pipe 107. The one-way valve is a common valve on the market that allows the solution to flow in one direction without backflow. This is a prior art and will not be described in detail. When the wastewater flows upward from the delivery pipe 107, the one-way valve will open. When there is a tendency of reverse flow, the one-way valve will close to prevent the wastewater from flowing back.

[0057] The first push plate 103 is penetrated by a second through hole 103a, and the inner wall of the second through hole 103a is provided with a third sliding groove 103a-1;

[0058] A blocking plate 108 is provided inside the containing tank 101, and a third sliding block 108a which can slide along the inside of the third sliding groove 103a-1 is provided on the end surface of the blocking plate 108.

[0059] In order to allow the wastewater to circulate and be continuously stirred inside the holding tank 101, the first push plate 103 is arrayed with multiple second through holes 103a, and then a blocking plate 108 with a larger cross-section than the second through hole 103a is installed below the second through hole 103a. At the same time, a third slider 108a is fixedly installed on the upper surface of the blocking plate 108, and the third slider 108a can slide along the inside of the third slide groove 103a-1. It should be noted that the third slide groove 103a-1 does not penetrate the first push plate 103, so the third slider 108a slides along the inside of the third slide groove 103a-1, which will open or close the second through hole 103a, that is, when the blocking plate 108 moves upward When it reaches a certain distance, it will hit the lower surface of the first push plate 103, making it unable to move further upward. At this time, the third slider 108a slides out of the third slide groove 103a-1, and when the blocking plate 108 moves downward, the third slider 108a will hit the bottom of the third slide groove 103a-1; in this scheme, the blocking plate 108 is made of a material with greater buoyancy. When the first push plate 103 moves downward, the blocking plate 108 will move upward when it contacts the water surface, and then block the second through hole 103a; waste water falls on the upper surface of the first push plate 103 from above, and the first push plate 103 moves upward, and the water will push the blocking plate 108 away and flow from the second through hole 103a to the lower surface, thereby realizing circulation.

[0060] A cover plate 109 is provided on the end surface of the container 101 .

[0061] In order to increase the flow rate of the wastewater moving downward when the second push plate 104 moves upward, a cover plate 109 is installed above the open holding tank 101, and the cover plate 109 can be equipped with openings and closing ports for adding wastewater, other solutions, etc.; the advantage of this design is that the wastewater enters the holding tank 101 from above, first passes through the filter plate 201, and the large particles of impurities in the wastewater are removed first. At the same time, when the second push plate 104 moves upward, the upper space is reduced, and the upper water pressure tends to increase, the water speed passing through the first through hole 104a is accelerated, the rotation speed of the shaft 105 is accelerated, and the stirring effect is better.

[0062] In summary, wastewater enters the holding tank 101 from above, the filter plate 201 preferentially filters large particles of impurities, and then other solutions or substances required for treating the wastewater are added; then the servo motor is started to allow the first push plate 103 and the second push plate 104 to reciprocate up and down, continuously stirring the internal wastewater to allow the internal solution to be evenly stirred.

[0063] Example 3

[0064] Reference Figure 1 to Figure 11 , which is the third embodiment of the present invention, and is different from the first two embodiments in that: the reciprocating rod 102 is provided with an output shaft 202, one end of the output shaft 202 is slidably connected to a driving shaft 203, an outer wall of the driving shaft 203 is provided with a movable channel 203a, and the movable channel 203a is provided with a resisting rod 204, and the resisting rod 204 is connected to the inner wall of the movable channel 203a by a first elastic member 205;

[0065] The inner wall array of the filter plate 201 is provided with a limit block 201a, and the outer wall of the limit block 201a is provided with a first arc surface 201a-1.

[0066] Among them, the servo motor of this scheme is connected to the output shaft 202, and the end of the output shaft 202 away from the servo motor is slidably connected to the drive shaft 203. This connection adopts a keyway matching connection, that is, when the output shaft 202 rotates, it can drive the output shaft 202 to rotate, and the key on the outer wall of the drive shaft 203 can slide up and down along the groove on the inner wall of the output shaft 202; the outer wall array of the drive shaft 203 has multiple active channels 203a, and a first elastic member 205 is fixedly installed at the bottom of the active channel 203a. The first elastic member 205 is a compression spring, and the other end of the first elastic member 205 is fixedly connected to the resistance rod 204. When the drive shaft 203 rotates, the resistance rod 204 slides along the first arc surface 201a-1, and is then pushed into the inside of the active channel 203a. When the drive shaft 203 reverses, the resistance rod 204 will resist the surface of the limit block 201a, and the filter plate 201 with it rotates together.

[0067] An active space 102c is disposed on the inner wall of the reciprocating rod 102 , and an abutment block 202a is disposed on the outer wall of the output shaft 202 and can slide along the inner part of the active space 102c .

[0068] In order to enable the reciprocating rod 102 to rotate when the output shaft 202 rotates, an active space 102c is opened on the inner wall of the reciprocating rod 102, and a resistance block 202a is fixedly installed on the outer wall of the output shaft 202; the active space 102c can be set larger than the resistance block 202a, so that when the output shaft 202 rotates, the resistance block 202a will resist the inner wall of the active space 102c, and then drive the reciprocating rod 102 to rotate. When reversal is required, the resistance block 202a will slide to the other inner wall of the active space 102c. In this process, the output shaft 202 drives the drive shaft 203 to rotate, and at the same time drives the filter plate 201 to rotate.

[0069] A closed-loop groove 101 b is provided on the inner wall of the holding tank 101 , and a roller 201 b which can slide along the inner part of the closed-loop groove 101 b is provided on the outer wall of the filter plate 201 .

[0070] A closed-loop groove 101b is provided on the inner wall of the holding tank 101. The closed-loop groove 101b is a wave-shaped closed-loop groove, which is divided into a high point 101b-1 and a low point 101b-2. The upper outlet of the delivery pipe 107 is between the high point 101b-1 and the low point 101b-2. When the driving shaft 203 drives the filter plate 201 to rotate, the roller 201b on the outer wall of the filter plate 201 will move along. When the filter plate 201 is at the high point 101b-1, the reciprocating rod 102 is driven to rotate, driving the first push rod 107 to rotate. The disk 103 and the second push disk 104 reciprocate up and down to accelerate the dissolution of the internal solutions. After the stirring process is completed, the filter plate 201 is driven to move to the low point 101b-2. At this time, the reciprocating rod 102 continues to be driven to rotate, and the internal solution will be filtered through the filter plate 201 from the delivery pipe 107; it should be noted that a manual switch valve is installed at the lowest point of the delivery pipe 107. When the solution is processed, the solution can then flow into the next process or be collected through the valve at the lower end of the delivery pipe 107.

[0071] It should be noted that in this solution, there is a space on the inner wall of the filter plate 201, the limit block 201a is on the inner wall of this space, and the resistance rod 204 is between this space, so when the filter plate 201 moves up and down, the filter plate 201 can drive the drive shaft 203 to slide.

[0072] In summary, during the process of adding wastewater, the filter plate 201 is at the high point 101b-1 of the closed-loop groove 101b, and at the same time, large particles of impurities in the wastewater are filtered; then other materials required for treating the wastewater are added, and then the servo motor is started to drive the reciprocating rod 102 to rotate, so that the first push plate 103 and the second push plate 104 accelerate the internal solution to dissolve each other and treat the wastewater; when the stirring is completed, the output shaft 202 is reversed, driving the drive shaft 203 to reverse, at this time, the resistance rod 204 on the outer wall of the drive shaft 203 resists the limit block 201a on the inner wall of the filter plate 201, thereby driving the filter plate 201 to rotate, and the roller 201b on the outer wall of the filter plate 201 moves along the high point 101b-1 of the closed-loop groove 101b to the low point 101b-2, at this time, the filter plate 201 is below the upper end outlet of the conveying pipe 107; the reciprocating rod 102 is driven to rotate again, so that the internal solution passes through the filter plate 201 and is completely filtered.

[0073] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A multi-stage treatment device for urea catalytic hydrolysis wastewater, characterized in that: include, A stirring assembly (100) comprises a containing tank (101), a reciprocating rod (102) disposed inside the containing tank (101), a first reciprocating groove (102a) disposed on the outer wall of the reciprocating rod (102), a first push plate (103) disposed on the outer wall of the reciprocating rod (102), and a second push plate (104) disposed inside the containing tank (101), wherein the second push plate (104) is penetrated by a first through hole (104a); A filter assembly (200), a filter plate (201) arranged inside the containing tank (101); The outer wall of the containing tank (101) is connected to a conveying pipe (107), both ends of the conveying pipe (107) are connected to the interior of the containing tank (101), and both ends of the conveying pipe (107) are respectively located on the upper and lower sides of the first push plate (103); The inner wall of the holding tank (101) is provided with a closed-loop groove (101b), and the outer wall of the filter plate (201) is provided with a roller (201b) that can slide along the inside of the closed-loop groove (101b); A second through hole (103a) is formed through the first push plate (103), and a third sliding groove (103a-1) is formed on the inner wall of the second through hole (103a); A blocking plate (108) is provided inside the containing tank (101), and an end surface of the blocking plate (108) is provided with a third sliding block (108a) that can slide along the inside of the third sliding groove (103a-1); An output shaft (202) is provided inside the reciprocating rod (102), one end of the output shaft (202) is slidably connected to a driving shaft (203), an outer wall of the driving shaft (203) is provided with a movable channel (203a), a resisting rod (204) is provided inside the movable channel (203a), and the resisting rod (204) is connected to the inner wall of the movable channel (203a) by means of a first elastic member (205); The inner wall array of the filter plate (201) is provided with a limit block (201a), and the outer wall of the limit block (201a) is provided with a first curved surface (201a-1).

2. The multi-stage treatment device for urea catalytic hydrolysis wastewater according to claim 1, characterized in that: A first sliding groove (104a-1) is provided on the inner wall of the first through hole (104a); A rotating shaft (105) is provided inside the containing tank (101); an array of stirring plates (105a) are provided on the outer wall of the rotating shaft (105); a groove (105a-1) is provided on the outer wall of the stirring plate (105a); a rolling ball (106) is provided inside the groove (105a-1) and can roll along the inner wall of the first slide groove (104a-1).

3. The multi-stage treatment device for urea catalytic hydrolysis wastewater according to claim 2, characterized in that: The outer wall of the reciprocating rod (102) is provided with a second reciprocating groove (102b); The inner wall of the second push plate (104) is provided with a first sliding block (104b) which can slide along the inside of the second reciprocating groove (102b); The inner wall of the first push plate (103) is provided with a first sliding block (104b) which can slide along the inside of the first reciprocating groove (102a).

4. The multi-stage treatment device for urea catalytic hydrolysis wastewater according to claim 3, characterized in that: The inner wall of the containing tank (101) is provided with a second slide groove (101a), and the outer walls of the first push plate (103) and the second push plate (104) are both provided with a second sliding block (104c) that can slide along the inside of the second slide groove (101a).

5. The multi-stage treatment device for urea catalytic hydrolysis wastewater according to claim 4, characterized in that: The end surface of the containing tank (101) is provided with a cover plate (109).

6. The multi-stage treatment device for urea catalytic hydrolysis wastewater according to claim 1 or 5, characterized in that: An activity space (102c) is provided on the inner wall of the reciprocating rod (102), and an abutment block (202a) that can slide along the inside of the activity space (102c) is provided on the outer wall of the output shaft (202).

Images